Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-4965.h"
  49 #include "iwl-helpers.h"
  50
  51 #ifdef CONFIG_IWL4965_DEBUG
  52 u32 iwl4965_debug_level;
  53 #endif
  54
  55 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
  56                                   struct iwl4965_tx_queue *txq);
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /* module parameters */
  65 static int iwl4965_param_disable_hw_scan; /* def: 0 = use 4965's h/w scan */
  66 static int iwl4965_param_debug;    /* def: 0 = minimal debug log messages */
  67 static int iwl4965_param_disable;  /* def: enable radio */
  68 static int iwl4965_param_antenna;  /* def: 0 = both antennas (use diversity) */
  69 int iwl4965_param_hwcrypto;        /* def: using software encryption */
  70 static int iwl4965_param_qos_enable = 1; /* def: 1 = use quality of service */
  71 int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 16 Tx queues */
  72 int iwl4965_param_amsdu_size_8K;   /* def: enable 8K amsdu size */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  80
  81 #ifdef CONFIG_IWL4965_DEBUG
  82 #define VD "d"
  83 #else
  84 #define VD
  85 #endif
  86
  87 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  88 #define VS "s"
  89 #else
  90 #define VS
  91 #endif
  92
  93 #define IWLWIFI_VERSION "1.2.23k" VD VS
  94 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  95 #define DRV_VERSION     IWLWIFI_VERSION
  96
  97 /* Change firmware file name, using "-" and incrementing number,
  98  *   *only* when uCode interface or architecture changes so that it
  99  *   is not compatible with earlier drivers.
 100  * This number will also appear in << 8 position of 1st dword of uCode file */
 101 #define IWL4965_UCODE_API "-1"
 102
 103 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 104 MODULE_VERSION(DRV_VERSION);
 105 MODULE_AUTHOR(DRV_COPYRIGHT);
 106 MODULE_LICENSE("GPL");
 107
 108 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 109 {
 110         u16 fc = le16_to_cpu(hdr->frame_control);
 111         int hdr_len = ieee80211_get_hdrlen(fc);
 112
 113         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 114                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 115         return NULL;
 116 }
 117
 118 static const struct ieee80211_hw_mode *iwl4965_get_hw_mode(
 119                 struct iwl4965_priv *priv, int mode)
 120 {
 121         int i;
 122
 123         for (i = 0; i < 3; i++)
 124                 if (priv->modes[i].mode == mode)
 125                         return &priv->modes[i];
 126
 127         return NULL;
 128 }
 129
 130 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 131 {
 132         /* Single white space is for Linksys APs */
 133         if (essid_len == 1 && essid[0] == ' ')
 134                 return 1;
 135
 136         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 137         while (essid_len) {
 138                 essid_len--;
 139                 if (essid[essid_len] != '\0')
 140                         return 0;
 141         }
 142
 143         return 1;
 144 }
 145
 146 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 147 {
 148         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 149         const char *s = essid;
 150         char *d = escaped;
 151
 152         if (iwl4965_is_empty_essid(essid, essid_len)) {
 153                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 154                 return escaped;
 155         }
 156
 157         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 158         while (essid_len--) {
 159                 if (*s == '\0') {
 160                         *d++ = '\\';
 161                         *d++ = '0';
 162                         s++;
 163                 } else
 164                         *d++ = *s++;
 165         }
 166         *d = '\0';
 167         return escaped;
 168 }
 169
 170 static void iwl4965_print_hex_dump(int level, void *p, u32 len)
 171 {
 172 #ifdef CONFIG_IWL4965_DEBUG
 173         if (!(iwl4965_debug_level & level))
 174                 return;
 175
 176         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 177                         p, len, 1);
 178 #endif
 179 }
 180
 181 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 182  * DMA services
 183  *
 184  * Theory of operation
 185  *
 186  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 187  * of buffer descriptors, each of which points to one or more data buffers for
 188  * the device to read from or fill.  Driver and device exchange status of each
 189  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 190  * entries in each circular buffer, to protect against confusing empty and full
 191  * queue states.
 192  *
 193  * The device reads or writes the data in the queues via the device's several
 194  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 195  *
 196  * For Tx queue, there are low mark and high mark limits. If, after queuing
 197  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 198  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 199  * Tx queue resumed.
 200  *
 201  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 202  * queue (#4) for sending commands to the device firmware, and 15 other
 203  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 204  *
 205  * See more detailed info in iwl-4965-hw.h.
 206  ***************************************************/
 207
 208 int iwl4965_queue_space(const struct iwl4965_queue *q)
 209 {
 210         int s = q->read_ptr - q->write_ptr;
 211
 212         if (q->read_ptr > q->write_ptr)
 213                 s -= q->n_bd;
 214
 215         if (s <= 0)
 216                 s += q->n_window;
 217         /* keep some reserve to not confuse empty and full situations */
 218         s -= 2;
 219         if (s < 0)
 220                 s = 0;
 221         return s;
 222 }
 223
 224 /**
 225  * iwl4965_queue_inc_wrap - increment queue index, wrap back to beginning
 226  * @index -- current index
 227  * @n_bd -- total number of entries in queue (must be power of 2)
 228  */
 229 static inline int iwl4965_queue_inc_wrap(int index, int n_bd)
 230 {
 231         return ++index & (n_bd - 1);
 232 }
 233
 234 /**
 235  * iwl4965_queue_dec_wrap - decrement queue index, wrap back to end
 236  * @index -- current index
 237  * @n_bd -- total number of entries in queue (must be power of 2)
 238  */
 239 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
 240 {
 241         return --index & (n_bd - 1);
 242 }
 243
 244 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 245 {
 246         return q->write_ptr > q->read_ptr ?
 247                 (i >= q->read_ptr && i < q->write_ptr) :
 248                 !(i < q->read_ptr && i >= q->write_ptr);
 249 }
 250
 251 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 252 {
 253         /* This is for scan command, the big buffer at end of command array */
 254         if (is_huge)
 255                 return q->n_window;     /* must be power of 2 */
 256
 257         /* Otherwise, use normal size buffers */
 258         return index & (q->n_window - 1);
 259 }
 260
 261 /**
 262  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 263  */
 264 static int iwl4965_queue_init(struct iwl4965_priv *priv, struct iwl4965_queue *q,
 265                           int count, int slots_num, u32 id)
 266 {
 267         q->n_bd = count;
 268         q->n_window = slots_num;
 269         q->id = id;
 270
 271         /* count must be power-of-two size, otherwise iwl4965_queue_inc_wrap
 272          * and iwl4965_queue_dec_wrap are broken. */
 273         BUG_ON(!is_power_of_2(count));
 274
 275         /* slots_num must be power-of-two size, otherwise
 276          * get_cmd_index is broken. */
 277         BUG_ON(!is_power_of_2(slots_num));
 278
 279         q->low_mark = q->n_window / 4;
 280         if (q->low_mark < 4)
 281                 q->low_mark = 4;
 282
 283         q->high_mark = q->n_window / 8;
 284         if (q->high_mark < 2)
 285                 q->high_mark = 2;
 286
 287         q->write_ptr = q->read_ptr = 0;
 288
 289         return 0;
 290 }
 291
 292 /**
 293  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 294  */
 295 static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv,
 296                               struct iwl4965_tx_queue *txq, u32 id)
 297 {
 298         struct pci_dev *dev = priv->pci_dev;
 299
 300         /* Driver private data, only for Tx (not command) queues,
 301          * not shared with device. */
 302         if (id != IWL_CMD_QUEUE_NUM) {
 303                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 304                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 305                 if (!txq->txb) {
 306                         IWL_ERROR("kmalloc for auxiliary BD "
 307                                   "structures failed\n");
 308                         goto error;
 309                 }
 310         } else
 311                 txq->txb = NULL;
 312
 313         /* Circular buffer of transmit frame descriptors (TFDs),
 314          * shared with device */
 315         txq->bd = pci_alloc_consistent(dev,
 316                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 317                         &txq->q.dma_addr);
 318
 319         if (!txq->bd) {
 320                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 321                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 322                 goto error;
 323         }
 324         txq->q.id = id;
 325
 326         return 0;
 327
 328  error:
 329         if (txq->txb) {
 330                 kfree(txq->txb);
 331                 txq->txb = NULL;
 332         }
 333
 334         return -ENOMEM;
 335 }
 336
 337 /**
 338  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 339  */
 340 int iwl4965_tx_queue_init(struct iwl4965_priv *priv,
 341                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 342 {
 343         struct pci_dev *dev = priv->pci_dev;
 344         int len;
 345         int rc = 0;
 346
 347         /*
 348          * Alloc buffer array for commands (Tx or other types of commands).
 349          * For the command queue (#4), allocate command space + one big
 350          * command for scan, since scan command is very huge; the system will
 351          * not have two scans at the same time, so only one is needed.
 352          * For normal Tx queues (all other queues), no super-size command
 353          * space is needed.
 354          */
 355         len = sizeof(struct iwl4965_cmd) * slots_num;
 356         if (txq_id == IWL_CMD_QUEUE_NUM)
 357                 len +=  IWL_MAX_SCAN_SIZE;
 358         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 359         if (!txq->cmd)
 360                 return -ENOMEM;
 361
 362         /* Alloc driver data array and TFD circular buffer */
 363         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 364         if (rc) {
 365                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 366
 367                 return -ENOMEM;
 368         }
 369         txq->need_update = 0;
 370
 371         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 372          * iwl4965_queue_inc_wrap and iwl4965_queue_dec_wrap are broken. */
 373         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 374
 375         /* Initialize queue's high/low-water marks, and head/tail indexes */
 376         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 377
 378         /* Tell device where to find queue */
 379         iwl4965_hw_tx_queue_init(priv, txq);
 380
 381         return 0;
 382 }
 383
 384 /**
 385  * iwl4965_tx_queue_free - Deallocate DMA queue.
 386  * @txq: Transmit queue to deallocate.
 387  *
 388  * Empty queue by removing and destroying all BD's.
 389  * Free all buffers.
 390  * 0-fill, but do not free "txq" descriptor structure.
 391  */
 392 void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
 393 {
 394         struct iwl4965_queue *q = &txq->q;
 395         struct pci_dev *dev = priv->pci_dev;
 396         int len;
 397
 398         if (q->n_bd == 0)
 399                 return;
 400
 401         /* first, empty all BD's */
 402         for (; q->write_ptr != q->read_ptr;
 403              q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd))
 404                 iwl4965_hw_txq_free_tfd(priv, txq);
 405
 406         len = sizeof(struct iwl4965_cmd) * q->n_window;
 407         if (q->id == IWL_CMD_QUEUE_NUM)
 408                 len += IWL_MAX_SCAN_SIZE;
 409
 410         /* De-alloc array of command/tx buffers */
 411         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 412
 413         /* De-alloc circular buffer of TFDs */
 414         if (txq->q.n_bd)
 415                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 416                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 417
 418         /* De-alloc array of per-TFD driver data */
 419         if (txq->txb) {
 420                 kfree(txq->txb);
 421                 txq->txb = NULL;
 422         }
 423
 424         /* 0-fill queue descriptor structure */
 425         memset(txq, 0, sizeof(*txq));
 426 }
 427
 428 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 429
 430 /*************** STATION TABLE MANAGEMENT ****
 431  * mac80211 should be examined to determine if sta_info is duplicating
 432  * the functionality provided here
 433  */
 434
 435 /**************************************************************/
 436
 437 #if 0 /* temporary disable till we add real remove station */
 438 /**
 439  * iwl4965_remove_station - Remove driver's knowledge of station.
 440  *
 441  * NOTE:  This does not remove station from device's station table.
 442  */
 443 static u8 iwl4965_remove_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
 444 {
 445         int index = IWL_INVALID_STATION;
 446         int i;
 447         unsigned long flags;
 448
 449         spin_lock_irqsave(&priv->sta_lock, flags);
 450
 451         if (is_ap)
 452                 index = IWL_AP_ID;
 453         else if (is_broadcast_ether_addr(addr))
 454                 index = priv->hw_setting.bcast_sta_id;
 455         else
 456                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 457                         if (priv->stations[i].used &&
 458                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 459                                                 addr)) {
 460                                 index = i;
 461                                 break;
 462                         }
 463
 464         if (unlikely(index == IWL_INVALID_STATION))
 465                 goto out;
 466
 467         if (priv->stations[index].used) {
 468                 priv->stations[index].used = 0;
 469                 priv->num_stations--;
 470         }
 471
 472         BUG_ON(priv->num_stations < 0);
 473
 474 out:
 475         spin_unlock_irqrestore(&priv->sta_lock, flags);
 476         return 0;
 477 }
 478 #endif
 479
 480 /**
 481  * iwl4965_clear_stations_table - Clear the driver's station table
 482  *
 483  * NOTE:  This does not clear or otherwise alter the device's station table.
 484  */
 485 static void iwl4965_clear_stations_table(struct iwl4965_priv *priv)
 486 {
 487         unsigned long flags;
 488
 489         spin_lock_irqsave(&priv->sta_lock, flags);
 490
 491         priv->num_stations = 0;
 492         memset(priv->stations, 0, sizeof(priv->stations));
 493
 494         spin_unlock_irqrestore(&priv->sta_lock, flags);
 495 }
 496
 497 /**
 498  * iwl4965_add_station_flags - Add station to tables in driver and device
 499  */
 500 u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr,
 501                                 int is_ap, u8 flags, void *ht_data)
 502 {
 503         int i;
 504         int index = IWL_INVALID_STATION;
 505         struct iwl4965_station_entry *station;
 506         unsigned long flags_spin;
 507         DECLARE_MAC_BUF(mac);
 508
 509         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 510         if (is_ap)
 511                 index = IWL_AP_ID;
 512         else if (is_broadcast_ether_addr(addr))
 513                 index = priv->hw_setting.bcast_sta_id;
 514         else
 515                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 516                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 517                                                 addr)) {
 518                                 index = i;
 519                                 break;
 520                         }
 521
 522                         if (!priv->stations[i].used &&
 523                             index == IWL_INVALID_STATION)
 524                                 index = i;
 525                 }
 526
 527
 528         /* These two conditions have the same outcome, but keep them separate
 529           since they have different meanings */
 530         if (unlikely(index == IWL_INVALID_STATION)) {
 531                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 532                 return index;
 533         }
 534
 535         if (priv->stations[index].used &&
 536             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 537                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 538                 return index;
 539         }
 540
 541
 542         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 543         station = &priv->stations[index];
 544         station->used = 1;
 545         priv->num_stations++;
 546
 547         /* Set up the REPLY_ADD_STA command to send to device */
 548         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 549         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 550         station->sta.mode = 0;
 551         station->sta.sta.sta_id = index;
 552         station->sta.station_flags = 0;
 553
 554 #ifdef CONFIG_IWL4965_HT
 555         /* BCAST station and IBSS stations do not work in HT mode */
 556         if (index != priv->hw_setting.bcast_sta_id &&
 557             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 558                 iwl4965_set_ht_add_station(priv, index,
 559                                  (struct ieee80211_ht_info *) ht_data);
 560 #endif /*CONFIG_IWL4965_HT*/
 561
 562         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 563
 564         /* Add station to device's station table */
 565         iwl4965_send_add_station(priv, &station->sta, flags);
 566         return index;
 567
 568 }
 569
 570 /*************** DRIVER STATUS FUNCTIONS   *****/
 571
 572 static inline int iwl4965_is_ready(struct iwl4965_priv *priv)
 573 {
 574         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 575          * set but EXIT_PENDING is not */
 576         return test_bit(STATUS_READY, &priv->status) &&
 577                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 578                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 579 }
 580
 581 static inline int iwl4965_is_alive(struct iwl4965_priv *priv)
 582 {
 583         return test_bit(STATUS_ALIVE, &priv->status);
 584 }
 585
 586 static inline int iwl4965_is_init(struct iwl4965_priv *priv)
 587 {
 588         return test_bit(STATUS_INIT, &priv->status);
 589 }
 590
 591 static inline int iwl4965_is_rfkill(struct iwl4965_priv *priv)
 592 {
 593         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 594                test_bit(STATUS_RF_KILL_SW, &priv->status);
 595 }
 596
 597 static inline int iwl4965_is_ready_rf(struct iwl4965_priv *priv)
 598 {
 599
 600         if (iwl4965_is_rfkill(priv))
 601                 return 0;
 602
 603         return iwl4965_is_ready(priv);
 604 }
 605
 606 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 607
 608 #define IWL_CMD(x) case x : return #x
 609
 610 static const char *get_cmd_string(u8 cmd)
 611 {
 612         switch (cmd) {
 613                 IWL_CMD(REPLY_ALIVE);
 614                 IWL_CMD(REPLY_ERROR);
 615                 IWL_CMD(REPLY_RXON);
 616                 IWL_CMD(REPLY_RXON_ASSOC);
 617                 IWL_CMD(REPLY_QOS_PARAM);
 618                 IWL_CMD(REPLY_RXON_TIMING);
 619                 IWL_CMD(REPLY_ADD_STA);
 620                 IWL_CMD(REPLY_REMOVE_STA);
 621                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 622                 IWL_CMD(REPLY_TX);
 623                 IWL_CMD(REPLY_RATE_SCALE);
 624                 IWL_CMD(REPLY_LEDS_CMD);
 625                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 626                 IWL_CMD(RADAR_NOTIFICATION);
 627                 IWL_CMD(REPLY_QUIET_CMD);
 628                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 629                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 630                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 631                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 632                 IWL_CMD(POWER_TABLE_CMD);
 633                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 634                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 635                 IWL_CMD(REPLY_SCAN_CMD);
 636                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 637                 IWL_CMD(SCAN_START_NOTIFICATION);
 638                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 639                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 640                 IWL_CMD(BEACON_NOTIFICATION);
 641                 IWL_CMD(REPLY_TX_BEACON);
 642                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 643                 IWL_CMD(QUIET_NOTIFICATION);
 644                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 645                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 646                 IWL_CMD(REPLY_BT_CONFIG);
 647                 IWL_CMD(REPLY_STATISTICS_CMD);
 648                 IWL_CMD(STATISTICS_NOTIFICATION);
 649                 IWL_CMD(REPLY_CARD_STATE_CMD);
 650                 IWL_CMD(CARD_STATE_NOTIFICATION);
 651                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 652                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 653                 IWL_CMD(SENSITIVITY_CMD);
 654                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 655                 IWL_CMD(REPLY_RX_PHY_CMD);
 656                 IWL_CMD(REPLY_RX_MPDU_CMD);
 657                 IWL_CMD(REPLY_4965_RX);
 658                 IWL_CMD(REPLY_COMPRESSED_BA);
 659         default:
 660                 return "UNKNOWN";
 661
 662         }
 663 }
 664
 665 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 666
 667 /**
 668  * iwl4965_enqueue_hcmd - enqueue a uCode command
 669  * @priv: device private data point
 670  * @cmd: a point to the ucode command structure
 671  *
 672  * The function returns < 0 values to indicate the operation is
 673  * failed. On success, it turns the index (> 0) of command in the
 674  * command queue.
 675  */
 676 static int iwl4965_enqueue_hcmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 677 {
 678         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 679         struct iwl4965_queue *q = &txq->q;
 680         struct iwl4965_tfd_frame *tfd;
 681         u32 *control_flags;
 682         struct iwl4965_cmd *out_cmd;
 683         u32 idx;
 684         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 685         dma_addr_t phys_addr;
 686         int ret;
 687         unsigned long flags;
 688
 689         /* If any of the command structures end up being larger than
 690          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 691          * we will need to increase the size of the TFD entries */
 692         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 693                !(cmd->meta.flags & CMD_SIZE_HUGE));
 694
 695         if (iwl4965_is_rfkill(priv)) {
 696                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 697                 return -EIO;
 698         }
 699
 700         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 701                 IWL_ERROR("No space for Tx\n");
 702                 return -ENOSPC;
 703         }
 704
 705         spin_lock_irqsave(&priv->hcmd_lock, flags);
 706
 707         tfd = &txq->bd[q->write_ptr];
 708         memset(tfd, 0, sizeof(*tfd));
 709
 710         control_flags = (u32 *) tfd;
 711
 712         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 713         out_cmd = &txq->cmd[idx];
 714
 715         out_cmd->hdr.cmd = cmd->id;
 716         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 717         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 718
 719         /* At this point, the out_cmd now has all of the incoming cmd
 720          * information */
 721
 722         out_cmd->hdr.flags = 0;
 723         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 724                         INDEX_TO_SEQ(q->write_ptr));
 725         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 726                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 727
 728         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 729                         offsetof(struct iwl4965_cmd, hdr);
 730         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 731
 732         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 733                      "%d bytes at %d[%d]:%d\n",
 734                      get_cmd_string(out_cmd->hdr.cmd),
 735                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 736                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 737
 738         txq->need_update = 1;
 739
 740         /* Set up entry in queue's byte count circular buffer */
 741         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 742
 743         /* Increment and update queue's write index */
 744         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
 745         iwl4965_tx_queue_update_write_ptr(priv, txq);
 746
 747         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 748         return ret ? ret : idx;
 749 }
 750
 751 static int iwl4965_send_cmd_async(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 752 {
 753         int ret;
 754
 755         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 756
 757         /* An asynchronous command can not expect an SKB to be set. */
 758         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 759
 760         /* An asynchronous command MUST have a callback. */
 761         BUG_ON(!cmd->meta.u.callback);
 762
 763         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 764                 return -EBUSY;
 765
 766         ret = iwl4965_enqueue_hcmd(priv, cmd);
 767         if (ret < 0) {
 768                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 769                           get_cmd_string(cmd->id), ret);
 770                 return ret;
 771         }
 772         return 0;
 773 }
 774
 775 static int iwl4965_send_cmd_sync(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 776 {
 777         int cmd_idx;
 778         int ret;
 779         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 780
 781         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 782
 783          /* A synchronous command can not have a callback set. */
 784         BUG_ON(cmd->meta.u.callback != NULL);
 785
 786         if (atomic_xchg(&entry, 1)) {
 787                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 788                           get_cmd_string(cmd->id));
 789                 return -EBUSY;
 790         }
 791
 792         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 793
 794         if (cmd->meta.flags & CMD_WANT_SKB)
 795                 cmd->meta.source = &cmd->meta;
 796
 797         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
 798         if (cmd_idx < 0) {
 799                 ret = cmd_idx;
 800                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 801                           get_cmd_string(cmd->id), ret);
 802                 goto out;
 803         }
 804
 805         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 806                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 807                         HOST_COMPLETE_TIMEOUT);
 808         if (!ret) {
 809                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 810                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 811                                   get_cmd_string(cmd->id),
 812                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 813
 814                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 815                         ret = -ETIMEDOUT;
 816                         goto cancel;
 817                 }
 818         }
 819
 820         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 821                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 822                                get_cmd_string(cmd->id));
 823                 ret = -ECANCELED;
 824                 goto fail;
 825         }
 826         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 827                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 828                                get_cmd_string(cmd->id));
 829                 ret = -EIO;
 830                 goto fail;
 831         }
 832         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 833                 IWL_ERROR("Error: Response NULL in '%s'\n",
 834                           get_cmd_string(cmd->id));
 835                 ret = -EIO;
 836                 goto out;
 837         }
 838
 839         ret = 0;
 840         goto out;
 841
 842 cancel:
 843         if (cmd->meta.flags & CMD_WANT_SKB) {
 844                 struct iwl4965_cmd *qcmd;
 845
 846                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 847                  * TX cmd queue. Otherwise in case the cmd comes
 848                  * in later, it will possibly set an invalid
 849                  * address (cmd->meta.source). */
 850                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 851                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 852         }
 853 fail:
 854         if (cmd->meta.u.skb) {
 855                 dev_kfree_skb_any(cmd->meta.u.skb);
 856                 cmd->meta.u.skb = NULL;
 857         }
 858 out:
 859         atomic_set(&entry, 0);
 860         return ret;
 861 }
 862
 863 int iwl4965_send_cmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 864 {
 865         if (cmd->meta.flags & CMD_ASYNC)
 866                 return iwl4965_send_cmd_async(priv, cmd);
 867
 868         return iwl4965_send_cmd_sync(priv, cmd);
 869 }
 870
 871 int iwl4965_send_cmd_pdu(struct iwl4965_priv *priv, u8 id, u16 len, const void *data)
 872 {
 873         struct iwl4965_host_cmd cmd = {
 874                 .id = id,
 875                 .len = len,
 876                 .data = data,
 877         };
 878
 879         return iwl4965_send_cmd_sync(priv, &cmd);
 880 }
 881
 882 static int __must_check iwl4965_send_cmd_u32(struct iwl4965_priv *priv, u8 id, u32 val)
 883 {
 884         struct iwl4965_host_cmd cmd = {
 885                 .id = id,
 886                 .len = sizeof(val),
 887                 .data = &val,
 888         };
 889
 890         return iwl4965_send_cmd_sync(priv, &cmd);
 891 }
 892
 893 int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
 894 {
 895         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 896 }
 897
 898 /**
 899  * iwl4965_rxon_add_station - add station into station table.
 900  *
 901  * there is only one AP station with id= IWL_AP_ID
 902  * NOTE: mutex must be held before calling this fnction
 903  */
 904 static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
 905                                 const u8 *addr, int is_ap)
 906 {
 907         u8 sta_id;
 908
 909         /* Add station to device's station table */
 910 #ifdef CONFIG_IWL4965_HT
 911         struct ieee80211_conf *conf = &priv->hw->conf;
 912         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 913
 914         if ((is_ap) &&
 915             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 916             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 917                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 918                                                    0, cur_ht_config);
 919         else
 920 #endif /* CONFIG_IWL4965_HT */
 921                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 922                                                    0, NULL);
 923
 924         /* Set up default rate scaling table in device's station table */
 925         iwl4965_add_station(priv, addr, is_ap);
 926
 927         return sta_id;
 928 }
 929
 930 /**
 931  * iwl4965_set_rxon_channel - Set the phymode and channel values in staging RXON
 932  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 933  * @channel: Any channel valid for the requested phymode
 934
 935  * In addition to setting the staging RXON, priv->phymode is also set.
 936  *
 937  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 938  * in the staging RXON flag structure based on the phymode
 939  */
 940 static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv, u8 phymode,
 941                                  u16 channel)
 942 {
 943         if (!iwl4965_get_channel_info(priv, phymode, channel)) {
 944                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 945                                channel, phymode);
 946                 return -EINVAL;
 947         }
 948
 949         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 950             (priv->phymode == phymode))
 951                 return 0;
 952
 953         priv->staging_rxon.channel = cpu_to_le16(channel);
 954         if (phymode == MODE_IEEE80211A)
 955                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 956         else
 957                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 958
 959         priv->phymode = phymode;
 960
 961         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 962
 963         return 0;
 964 }
 965
 966 /**
 967  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 968  *
 969  * NOTE:  This is really only useful during development and can eventually
 970  * be #ifdef'd out once the driver is stable and folks aren't actively
 971  * making changes
 972  */
 973 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 974 {
 975         int error = 0;
 976         int counter = 1;
 977
 978         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 979                 error |= le32_to_cpu(rxon->flags &
 980                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 981                                  RXON_FLG_RADAR_DETECT_MSK));
 982                 if (error)
 983                         IWL_WARNING("check 24G fields %d | %d\n",
 984                                     counter++, error);
 985         } else {
 986                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 987                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 988                 if (error)
 989                         IWL_WARNING("check 52 fields %d | %d\n",
 990                                     counter++, error);
 991                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 992                 if (error)
 993                         IWL_WARNING("check 52 CCK %d | %d\n",
 994                                     counter++, error);
 995         }
 996         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 997         if (error)
 998                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 999
1000         /* make sure basic rates 6Mbps and 1Mbps are supported */
1001         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
1002                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
1003         if (error)
1004                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
1005
1006         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
1007         if (error)
1008                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
1009
1010         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
1011                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
1012         if (error)
1013                 IWL_WARNING("check CCK and short slot %d | %d\n",
1014                             counter++, error);
1015
1016         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
1017                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
1018         if (error)
1019                 IWL_WARNING("check CCK & auto detect %d | %d\n",
1020                             counter++, error);
1021
1022         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
1023                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
1024         if (error)
1025                 IWL_WARNING("check TGG and auto detect %d | %d\n",
1026                             counter++, error);
1027
1028         if (error)
1029                 IWL_WARNING("Tuning to channel %d\n",
1030                             le16_to_cpu(rxon->channel));
1031
1032         if (error) {
1033                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
1034                 return -1;
1035         }
1036         return 0;
1037 }
1038
1039 /**
1040  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1041  * @priv: staging_rxon is compared to active_rxon
1042  *
1043  * If the RXON structure is changing enough to require a new tune,
1044  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1045  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1046  */
1047 static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
1048 {
1049
1050         /* These items are only settable from the full RXON command */
1051         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1052             compare_ether_addr(priv->staging_rxon.bssid_addr,
1053                                priv->active_rxon.bssid_addr) ||
1054             compare_ether_addr(priv->staging_rxon.node_addr,
1055                                priv->active_rxon.node_addr) ||
1056             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1057                                priv->active_rxon.wlap_bssid_addr) ||
1058             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1059             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1060             (priv->staging_rxon.air_propagation !=
1061              priv->active_rxon.air_propagation) ||
1062             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
1063              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1064             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1065              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1066             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1067             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1068                 return 1;
1069
1070         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1071          * be updated with the RXON_ASSOC command -- however only some
1072          * flag transitions are allowed using RXON_ASSOC */
1073
1074         /* Check if we are not switching bands */
1075         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1076             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1077                 return 1;
1078
1079         /* Check if we are switching association toggle */
1080         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1081                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1082                 return 1;
1083
1084         return 0;
1085 }
1086
1087 static int iwl4965_send_rxon_assoc(struct iwl4965_priv *priv)
1088 {
1089         int rc = 0;
1090         struct iwl4965_rx_packet *res = NULL;
1091         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1092         struct iwl4965_host_cmd cmd = {
1093                 .id = REPLY_RXON_ASSOC,
1094                 .len = sizeof(rxon_assoc),
1095                 .meta.flags = CMD_WANT_SKB,
1096                 .data = &rxon_assoc,
1097         };
1098         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1099         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1100
1101         if ((rxon1->flags == rxon2->flags) &&
1102             (rxon1->filter_flags == rxon2->filter_flags) &&
1103             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1104             (rxon1->ofdm_ht_single_stream_basic_rates ==
1105              rxon2->ofdm_ht_single_stream_basic_rates) &&
1106             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1107              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1108             (rxon1->rx_chain == rxon2->rx_chain) &&
1109             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1110                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1111                 return 0;
1112         }
1113
1114         rxon_assoc.flags = priv->staging_rxon.flags;
1115         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1116         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1117         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1118         rxon_assoc.reserved = 0;
1119         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1120             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1121         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1122             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1123         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1124
1125         rc = iwl4965_send_cmd_sync(priv, &cmd);
1126         if (rc)
1127                 return rc;
1128
1129         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1130         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1131                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1132                 rc = -EIO;
1133         }
1134
1135         priv->alloc_rxb_skb--;
1136         dev_kfree_skb_any(cmd.meta.u.skb);
1137
1138         return rc;
1139 }
1140
1141 /**
1142  * iwl4965_commit_rxon - commit staging_rxon to hardware
1143  *
1144  * The RXON command in staging_rxon is committed to the hardware and
1145  * the active_rxon structure is updated with the new data.  This
1146  * function correctly transitions out of the RXON_ASSOC_MSK state if
1147  * a HW tune is required based on the RXON structure changes.
1148  */
1149 static int iwl4965_commit_rxon(struct iwl4965_priv *priv)
1150 {
1151         /* cast away the const for active_rxon in this function */
1152         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1153         DECLARE_MAC_BUF(mac);
1154         int rc = 0;
1155
1156         if (!iwl4965_is_alive(priv))
1157                 return -1;
1158
1159         /* always get timestamp with Rx frame */
1160         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1161
1162         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1163         if (rc) {
1164                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1165                 return -EINVAL;
1166         }
1167
1168         /* If we don't need to send a full RXON, we can use
1169          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1170          * and other flags for the current radio configuration. */
1171         if (!iwl4965_full_rxon_required(priv)) {
1172                 rc = iwl4965_send_rxon_assoc(priv);
1173                 if (rc) {
1174                         IWL_ERROR("Error setting RXON_ASSOC "
1175                                   "configuration (%d).\n", rc);
1176                         return rc;
1177                 }
1178
1179                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1180
1181                 return 0;
1182         }
1183
1184         /* station table will be cleared */
1185         priv->assoc_station_added = 0;
1186
1187 #ifdef CONFIG_IWL4965_SENSITIVITY
1188         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1189         if (!priv->error_recovering)
1190                 priv->start_calib = 0;
1191
1192         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1193 #endif /* CONFIG_IWL4965_SENSITIVITY */
1194
1195         /* If we are currently associated and the new config requires
1196          * an RXON_ASSOC and the new config wants the associated mask enabled,
1197          * we must clear the associated from the active configuration
1198          * before we apply the new config */
1199         if (iwl4965_is_associated(priv) &&
1200             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1201                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1202                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1203
1204                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1205                                       sizeof(struct iwl4965_rxon_cmd),
1206                                       &priv->active_rxon);
1207
1208                 /* If the mask clearing failed then we set
1209                  * active_rxon back to what it was previously */
1210                 if (rc) {
1211                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1212                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1213                                   "configuration (%d).\n", rc);
1214                         return rc;
1215                 }
1216         }
1217
1218         IWL_DEBUG_INFO("Sending RXON\n"
1219                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1220                        "* channel = %d\n"
1221                        "* bssid = %s\n",
1222                        ((priv->staging_rxon.filter_flags &
1223                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1224                        le16_to_cpu(priv->staging_rxon.channel),
1225                        print_mac(mac, priv->staging_rxon.bssid_addr));
1226
1227         /* Apply the new configuration */
1228         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1229                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1230         if (rc) {
1231                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1232                 return rc;
1233         }
1234
1235         iwl4965_clear_stations_table(priv);
1236
1237 #ifdef CONFIG_IWL4965_SENSITIVITY
1238         if (!priv->error_recovering)
1239                 priv->start_calib = 0;
1240
1241         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1242         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1243 #endif /* CONFIG_IWL4965_SENSITIVITY */
1244
1245         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1246
1247         /* If we issue a new RXON command which required a tune then we must
1248          * send a new TXPOWER command or we won't be able to Tx any frames */
1249         rc = iwl4965_hw_reg_send_txpower(priv);
1250         if (rc) {
1251                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1252                 return rc;
1253         }
1254
1255         /* Add the broadcast address so we can send broadcast frames */
1256         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1257             IWL_INVALID_STATION) {
1258                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1259                 return -EIO;
1260         }
1261
1262         /* If we have set the ASSOC_MSK and we are in BSS mode then
1263          * add the IWL_AP_ID to the station rate table */
1264         if (iwl4965_is_associated(priv) &&
1265             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1266                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1267                     == IWL_INVALID_STATION) {
1268                         IWL_ERROR("Error adding AP address for transmit.\n");
1269                         return -EIO;
1270                 }
1271                 priv->assoc_station_added = 1;
1272         }
1273
1274         return 0;
1275 }
1276
1277 static int iwl4965_send_bt_config(struct iwl4965_priv *priv)
1278 {
1279         struct iwl4965_bt_cmd bt_cmd = {
1280                 .flags = 3,
1281                 .lead_time = 0xAA,
1282                 .max_kill = 1,
1283                 .kill_ack_mask = 0,
1284                 .kill_cts_mask = 0,
1285         };
1286
1287         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1288                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1289 }
1290
1291 static int iwl4965_send_scan_abort(struct iwl4965_priv *priv)
1292 {
1293         int rc = 0;
1294         struct iwl4965_rx_packet *res;
1295         struct iwl4965_host_cmd cmd = {
1296                 .id = REPLY_SCAN_ABORT_CMD,
1297                 .meta.flags = CMD_WANT_SKB,
1298         };
1299
1300         /* If there isn't a scan actively going on in the hardware
1301          * then we are in between scan bands and not actually
1302          * actively scanning, so don't send the abort command */
1303         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1304                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1305                 return 0;
1306         }
1307
1308         rc = iwl4965_send_cmd_sync(priv, &cmd);
1309         if (rc) {
1310                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1311                 return rc;
1312         }
1313
1314         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1315         if (res->u.status != CAN_ABORT_STATUS) {
1316                 /* The scan abort will return 1 for success or
1317                  * 2 for "failure".  A failure condition can be
1318                  * due to simply not being in an active scan which
1319                  * can occur if we send the scan abort before we
1320                  * the microcode has notified us that a scan is
1321                  * completed. */
1322                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1323                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1324                 clear_bit(STATUS_SCAN_HW, &priv->status);
1325         }
1326
1327         dev_kfree_skb_any(cmd.meta.u.skb);
1328
1329         return rc;
1330 }
1331
1332 static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
1333                                         struct iwl4965_cmd *cmd,
1334                                         struct sk_buff *skb)
1335 {
1336         return 1;
1337 }
1338
1339 /*
1340  * CARD_STATE_CMD
1341  *
1342  * Use: Sets the device's internal card state to enable, disable, or halt
1343  *
1344  * When in the 'enable' state the card operates as normal.
1345  * When in the 'disable' state, the card enters into a low power mode.
1346  * When in the 'halt' state, the card is shut down and must be fully
1347  * restarted to come back on.
1348  */
1349 static int iwl4965_send_card_state(struct iwl4965_priv *priv, u32 flags, u8 meta_flag)
1350 {
1351         struct iwl4965_host_cmd cmd = {
1352                 .id = REPLY_CARD_STATE_CMD,
1353                 .len = sizeof(u32),
1354                 .data = &flags,
1355                 .meta.flags = meta_flag,
1356         };
1357
1358         if (meta_flag & CMD_ASYNC)
1359                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1360
1361         return iwl4965_send_cmd(priv, &cmd);
1362 }
1363
1364 static int iwl4965_add_sta_sync_callback(struct iwl4965_priv *priv,
1365                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1366 {
1367         struct iwl4965_rx_packet *res = NULL;
1368
1369         if (!skb) {
1370                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1371                 return 1;
1372         }
1373
1374         res = (struct iwl4965_rx_packet *)skb->data;
1375         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1376                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1377                           res->hdr.flags);
1378                 return 1;
1379         }
1380
1381         switch (res->u.add_sta.status) {
1382         case ADD_STA_SUCCESS_MSK:
1383                 break;
1384         default:
1385                 break;
1386         }
1387
1388         /* We didn't cache the SKB; let the caller free it */
1389         return 1;
1390 }
1391
1392 int iwl4965_send_add_station(struct iwl4965_priv *priv,
1393                          struct iwl4965_addsta_cmd *sta, u8 flags)
1394 {
1395         struct iwl4965_rx_packet *res = NULL;
1396         int rc = 0;
1397         struct iwl4965_host_cmd cmd = {
1398                 .id = REPLY_ADD_STA,
1399                 .len = sizeof(struct iwl4965_addsta_cmd),
1400                 .meta.flags = flags,
1401                 .data = sta,
1402         };
1403
1404         if (flags & CMD_ASYNC)
1405                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1406         else
1407                 cmd.meta.flags |= CMD_WANT_SKB;
1408
1409         rc = iwl4965_send_cmd(priv, &cmd);
1410
1411         if (rc || (flags & CMD_ASYNC))
1412                 return rc;
1413
1414         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1415         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1416                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1417                           res->hdr.flags);
1418                 rc = -EIO;
1419         }
1420
1421         if (rc == 0) {
1422                 switch (res->u.add_sta.status) {
1423                 case ADD_STA_SUCCESS_MSK:
1424                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1425                         break;
1426                 default:
1427                         rc = -EIO;
1428                         IWL_WARNING("REPLY_ADD_STA failed\n");
1429                         break;
1430                 }
1431         }
1432
1433         priv->alloc_rxb_skb--;
1434         dev_kfree_skb_any(cmd.meta.u.skb);
1435
1436         return rc;
1437 }
1438
1439 static int iwl4965_update_sta_key_info(struct iwl4965_priv *priv,
1440                                    struct ieee80211_key_conf *keyconf,
1441                                    u8 sta_id)
1442 {
1443         unsigned long flags;
1444         __le16 key_flags = 0;
1445
1446         switch (keyconf->alg) {
1447         case ALG_CCMP:
1448                 key_flags |= STA_KEY_FLG_CCMP;
1449                 key_flags |= cpu_to_le16(
1450                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1451                 key_flags &= ~STA_KEY_FLG_INVALID;
1452                 break;
1453         case ALG_TKIP:
1454         case ALG_WEP:
1455         default:
1456                 return -EINVAL;
1457         }
1458         spin_lock_irqsave(&priv->sta_lock, flags);
1459         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1460         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1461         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1462                keyconf->keylen);
1463
1464         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1465                keyconf->keylen);
1466         priv->stations[sta_id].sta.key.key_flags = key_flags;
1467         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1468         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1469
1470         spin_unlock_irqrestore(&priv->sta_lock, flags);
1471
1472         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1473         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1474         return 0;
1475 }
1476
1477 static int iwl4965_clear_sta_key_info(struct iwl4965_priv *priv, u8 sta_id)
1478 {
1479         unsigned long flags;
1480
1481         spin_lock_irqsave(&priv->sta_lock, flags);
1482         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1483         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1484         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1485         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1486         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1487         spin_unlock_irqrestore(&priv->sta_lock, flags);
1488
1489         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1490         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1491         return 0;
1492 }
1493
1494 static void iwl4965_clear_free_frames(struct iwl4965_priv *priv)
1495 {
1496         struct list_head *element;
1497
1498         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1499                        priv->frames_count);
1500
1501         while (!list_empty(&priv->free_frames)) {
1502                 element = priv->free_frames.next;
1503                 list_del(element);
1504                 kfree(list_entry(element, struct iwl4965_frame, list));
1505                 priv->frames_count--;
1506         }
1507
1508         if (priv->frames_count) {
1509                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1510                             priv->frames_count);
1511                 priv->frames_count = 0;
1512         }
1513 }
1514
1515 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl4965_priv *priv)
1516 {
1517         struct iwl4965_frame *frame;
1518         struct list_head *element;
1519         if (list_empty(&priv->free_frames)) {
1520                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1521                 if (!frame) {
1522                         IWL_ERROR("Could not allocate frame!\n");
1523                         return NULL;
1524                 }
1525
1526                 priv->frames_count++;
1527                 return frame;
1528         }
1529
1530         element = priv->free_frames.next;
1531         list_del(element);
1532         return list_entry(element, struct iwl4965_frame, list);
1533 }
1534
1535 static void iwl4965_free_frame(struct iwl4965_priv *priv, struct iwl4965_frame *frame)
1536 {
1537         memset(frame, 0, sizeof(*frame));
1538         list_add(&frame->list, &priv->free_frames);
1539 }
1540
1541 unsigned int iwl4965_fill_beacon_frame(struct iwl4965_priv *priv,
1542                                 struct ieee80211_hdr *hdr,
1543                                 const u8 *dest, int left)
1544 {
1545
1546         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1547             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1548              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1549                 return 0;
1550
1551         if (priv->ibss_beacon->len > left)
1552                 return 0;
1553
1554         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1555
1556         return priv->ibss_beacon->len;
1557 }
1558
1559 int iwl4965_rate_index_from_plcp(int plcp)
1560 {
1561         int i = 0;
1562
1563         /* 4965 HT rate format */
1564         if (plcp & RATE_MCS_HT_MSK) {
1565                 i = (plcp & 0xff);
1566
1567                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1568                         i = i - IWL_RATE_MIMO_6M_PLCP;
1569
1570                 i += IWL_FIRST_OFDM_RATE;
1571                 /* skip 9M not supported in ht*/
1572                 if (i >= IWL_RATE_9M_INDEX)
1573                         i += 1;
1574                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1575                     (i <= IWL_LAST_OFDM_RATE))
1576                         return i;
1577
1578         /* 4965 legacy rate format, search for match in table */
1579         } else {
1580                 for (i = 0; i < ARRAY_SIZE(iwl4965_rates); i++)
1581                         if (iwl4965_rates[i].plcp == (plcp &0xFF))
1582                                 return i;
1583         }
1584         return -1;
1585 }
1586
1587 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1588 {
1589         u8 i;
1590
1591         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1592              i = iwl4965_rates[i].next_ieee) {
1593                 if (rate_mask & (1 << i))
1594                         return iwl4965_rates[i].plcp;
1595         }
1596
1597         return IWL_RATE_INVALID;
1598 }
1599
1600 static int iwl4965_send_beacon_cmd(struct iwl4965_priv *priv)
1601 {
1602         struct iwl4965_frame *frame;
1603         unsigned int frame_size;
1604         int rc;
1605         u8 rate;
1606
1607         frame = iwl4965_get_free_frame(priv);
1608
1609         if (!frame) {
1610                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1611                           "command.\n");
1612                 return -ENOMEM;
1613         }
1614
1615         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1616                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1617                                                 0xFF0);
1618                 if (rate == IWL_INVALID_RATE)
1619                         rate = IWL_RATE_6M_PLCP;
1620         } else {
1621                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1622                 if (rate == IWL_INVALID_RATE)
1623                         rate = IWL_RATE_1M_PLCP;
1624         }
1625
1626         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1627
1628         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1629                               &frame->u.cmd[0]);
1630
1631         iwl4965_free_frame(priv, frame);
1632
1633         return rc;
1634 }
1635
1636 /******************************************************************************
1637  *
1638  * EEPROM related functions
1639  *
1640  ******************************************************************************/
1641
1642 static void get_eeprom_mac(struct iwl4965_priv *priv, u8 *mac)
1643 {
1644         memcpy(mac, priv->eeprom.mac_address, 6);
1645 }
1646
1647 static inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv *priv)
1648 {
1649         iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1650                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
1651 }
1652
1653 /**
1654  * iwl4965_eeprom_init - read EEPROM contents
1655  *
1656  * Load the EEPROM contents from adapter into priv->eeprom
1657  *
1658  * NOTE:  This routine uses the non-debug IO access functions.
1659  */
1660 int iwl4965_eeprom_init(struct iwl4965_priv *priv)
1661 {
1662         u16 *e = (u16 *)&priv->eeprom;
1663         u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
1664         u32 r;
1665         int sz = sizeof(priv->eeprom);
1666         int rc;
1667         int i;
1668         u16 addr;
1669
1670         /* The EEPROM structure has several padding buffers within it
1671          * and when adding new EEPROM maps is subject to programmer errors
1672          * which may be very difficult to identify without explicitly
1673          * checking the resulting size of the eeprom map. */
1674         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1675
1676         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1677                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1678                 return -ENOENT;
1679         }
1680
1681         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1682         rc = iwl4965_eeprom_acquire_semaphore(priv);
1683         if (rc < 0) {
1684                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1685                 return -ENOENT;
1686         }
1687
1688         /* eeprom is an array of 16bit values */
1689         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1690                 _iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
1691                 _iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1692
1693                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1694                                         i += IWL_EEPROM_ACCESS_DELAY) {
1695                         r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
1696                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1697                                 break;
1698                         udelay(IWL_EEPROM_ACCESS_DELAY);
1699                 }
1700
1701                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1702                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1703                         rc = -ETIMEDOUT;
1704                         goto done;
1705                 }
1706                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1707         }
1708         rc = 0;
1709
1710 done:
1711         iwl4965_eeprom_release_semaphore(priv);
1712         return rc;
1713 }
1714
1715 /******************************************************************************
1716  *
1717  * Misc. internal state and helper functions
1718  *
1719  ******************************************************************************/
1720 #ifdef CONFIG_IWL4965_DEBUG
1721
1722 /**
1723  * iwl4965_report_frame - dump frame to syslog during debug sessions
1724  *
1725  * You may hack this function to show different aspects of received frames,
1726  * including selective frame dumps.
1727  * group100 parameter selects whether to show 1 out of 100 good frames.
1728  *
1729  * TODO:  This was originally written for 3945, need to audit for
1730  *        proper operation with 4965.
1731  */
1732 void iwl4965_report_frame(struct iwl4965_priv *priv,
1733                       struct iwl4965_rx_packet *pkt,
1734                       struct ieee80211_hdr *header, int group100)
1735 {
1736         u32 to_us;
1737         u32 print_summary = 0;
1738         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1739         u32 hundred = 0;
1740         u32 dataframe = 0;
1741         u16 fc;
1742         u16 seq_ctl;
1743         u16 channel;
1744         u16 phy_flags;
1745         int rate_sym;
1746         u16 length;
1747         u16 status;
1748         u16 bcn_tmr;
1749         u32 tsf_low;
1750         u64 tsf;
1751         u8 rssi;
1752         u8 agc;
1753         u16 sig_avg;
1754         u16 noise_diff;
1755         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1756         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1757         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
1758         u8 *data = IWL_RX_DATA(pkt);
1759
1760         /* MAC header */
1761         fc = le16_to_cpu(header->frame_control);
1762         seq_ctl = le16_to_cpu(header->seq_ctrl);
1763
1764         /* metadata */
1765         channel = le16_to_cpu(rx_hdr->channel);
1766         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1767         rate_sym = rx_hdr->rate;
1768         length = le16_to_cpu(rx_hdr->len);
1769
1770         /* end-of-frame status and timestamp */
1771         status = le32_to_cpu(rx_end->status);
1772         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1773         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1774         tsf = le64_to_cpu(rx_end->timestamp);
1775
1776         /* signal statistics */
1777         rssi = rx_stats->rssi;
1778         agc = rx_stats->agc;
1779         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1780         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1781
1782         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1783
1784         /* if data frame is to us and all is good,
1785          *   (optionally) print summary for only 1 out of every 100 */
1786         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1787             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1788                 dataframe = 1;
1789                 if (!group100)
1790                         print_summary = 1;      /* print each frame */
1791                 else if (priv->framecnt_to_us < 100) {
1792                         priv->framecnt_to_us++;
1793                         print_summary = 0;
1794                 } else {
1795                         priv->framecnt_to_us = 0;
1796                         print_summary = 1;
1797                         hundred = 1;
1798                 }
1799         } else {
1800                 /* print summary for all other frames */
1801                 print_summary = 1;
1802         }
1803
1804         if (print_summary) {
1805                 char *title;
1806                 u32 rate;
1807
1808                 if (hundred)
1809                         title = "100Frames";
1810                 else if (fc & IEEE80211_FCTL_RETRY)
1811                         title = "Retry";
1812                 else if (ieee80211_is_assoc_response(fc))
1813                         title = "AscRsp";
1814                 else if (ieee80211_is_reassoc_response(fc))
1815                         title = "RasRsp";
1816                 else if (ieee80211_is_probe_response(fc)) {
1817                         title = "PrbRsp";
1818                         print_dump = 1; /* dump frame contents */
1819                 } else if (ieee80211_is_beacon(fc)) {
1820                         title = "Beacon";
1821                         print_dump = 1; /* dump frame contents */
1822                 } else if (ieee80211_is_atim(fc))
1823                         title = "ATIM";
1824                 else if (ieee80211_is_auth(fc))
1825                         title = "Auth";
1826                 else if (ieee80211_is_deauth(fc))
1827                         title = "DeAuth";
1828                 else if (ieee80211_is_disassoc(fc))
1829                         title = "DisAssoc";
1830                 else
1831                         title = "Frame";
1832
1833                 rate = iwl4965_rate_index_from_plcp(rate_sym);
1834                 if (rate == -1)
1835                         rate = 0;
1836                 else
1837                         rate = iwl4965_rates[rate].ieee / 2;
1838
1839                 /* print frame summary.
1840                  * MAC addresses show just the last byte (for brevity),
1841                  *    but you can hack it to show more, if you'd like to. */
1842                 if (dataframe)
1843                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1844                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1845                                      title, fc, header->addr1[5],
1846                                      length, rssi, channel, rate);
1847                 else {
1848                         /* src/dst addresses assume managed mode */
1849                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1850                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1851                                      "phy=0x%02x, chnl=%d\n",
1852                                      title, fc, header->addr1[5],
1853                                      header->addr3[5], rssi,
1854                                      tsf_low - priv->scan_start_tsf,
1855                                      phy_flags, channel);
1856                 }
1857         }
1858         if (print_dump)
1859                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
1860 }
1861 #endif
1862
1863 static void iwl4965_unset_hw_setting(struct iwl4965_priv *priv)
1864 {
1865         if (priv->hw_setting.shared_virt)
1866                 pci_free_consistent(priv->pci_dev,
1867                                     sizeof(struct iwl4965_shared),
1868                                     priv->hw_setting.shared_virt,
1869                                     priv->hw_setting.shared_phys);
1870 }
1871
1872 /**
1873  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1874  *
1875  * return : set the bit for each supported rate insert in ie
1876  */
1877 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1878                                     u16 basic_rate, int *left)
1879 {
1880         u16 ret_rates = 0, bit;
1881         int i;
1882         u8 *cnt = ie;
1883         u8 *rates = ie + 1;
1884
1885         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1886                 if (bit & supported_rate) {
1887                         ret_rates |= bit;
1888                         rates[*cnt] = iwl4965_rates[i].ieee |
1889                                 ((bit & basic_rate) ? 0x80 : 0x00);
1890                         (*cnt)++;
1891                         (*left)--;
1892                         if ((*left <= 0) ||
1893                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1894                                 break;
1895                 }
1896         }
1897
1898         return ret_rates;
1899 }
1900
1901 #ifdef CONFIG_IWL4965_HT
1902 void static iwl4965_set_ht_capab(struct ieee80211_hw *hw,
1903                              struct ieee80211_ht_cap *ht_cap,
1904                              u8 use_current_config);
1905 #endif
1906
1907 /**
1908  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1909  */
1910 static u16 iwl4965_fill_probe_req(struct iwl4965_priv *priv,
1911                               struct ieee80211_mgmt *frame,
1912                               int left, int is_direct)
1913 {
1914         int len = 0;
1915         u8 *pos = NULL;
1916         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1917 #ifdef CONFIG_IWL4965_HT
1918         struct ieee80211_hw_mode *mode;
1919 #endif /* CONFIG_IWL4965_HT */
1920
1921         /* Make sure there is enough space for the probe request,
1922          * two mandatory IEs and the data */
1923         left -= 24;
1924         if (left < 0)
1925                 return 0;
1926         len += 24;
1927
1928         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1929         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1930         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1931         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1932         frame->seq_ctrl = 0;
1933
1934         /* fill in our indirect SSID IE */
1935         /* ...next IE... */
1936
1937         left -= 2;
1938         if (left < 0)
1939                 return 0;
1940         len += 2;
1941         pos = &(frame->u.probe_req.variable[0]);
1942         *pos++ = WLAN_EID_SSID;
1943         *pos++ = 0;
1944
1945         /* fill in our direct SSID IE... */
1946         if (is_direct) {
1947                 /* ...next IE... */
1948                 left -= 2 + priv->essid_len;
1949                 if (left < 0)
1950                         return 0;
1951                 /* ... fill it in... */
1952                 *pos++ = WLAN_EID_SSID;
1953                 *pos++ = priv->essid_len;
1954                 memcpy(pos, priv->essid, priv->essid_len);
1955                 pos += priv->essid_len;
1956                 len += 2 + priv->essid_len;
1957         }
1958
1959         /* fill in supported rate */
1960         /* ...next IE... */
1961         left -= 2;
1962         if (left < 0)
1963                 return 0;
1964
1965         /* ... fill it in... */
1966         *pos++ = WLAN_EID_SUPP_RATES;
1967         *pos = 0;
1968
1969         /* exclude 60M rate */
1970         active_rates = priv->rates_mask;
1971         active_rates &= ~IWL_RATE_60M_MASK;
1972
1973         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1974
1975         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1976         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1977                         active_rate_basic, &left);
1978         active_rates &= ~ret_rates;
1979
1980         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1981                                  active_rate_basic, &left);
1982         active_rates &= ~ret_rates;
1983
1984         len += 2 + *pos;
1985         pos += (*pos) + 1;
1986         if (active_rates == 0)
1987                 goto fill_end;
1988
1989         /* fill in supported extended rate */
1990         /* ...next IE... */
1991         left -= 2;
1992         if (left < 0)
1993                 return 0;
1994         /* ... fill it in... */
1995         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1996         *pos = 0;
1997         iwl4965_supported_rate_to_ie(pos, active_rates,
1998                                  active_rate_basic, &left);
1999         if (*pos > 0)
2000                 len += 2 + *pos;
2001
2002 #ifdef CONFIG_IWL4965_HT
2003         mode = priv->hw->conf.mode;
2004         if (mode->ht_info.ht_supported) {
2005                 pos += (*pos) + 1;
2006                 *pos++ = WLAN_EID_HT_CAPABILITY;
2007                 *pos++ = sizeof(struct ieee80211_ht_cap);
2008                 iwl4965_set_ht_capab(priv->hw,
2009                                 (struct ieee80211_ht_cap *)pos, 0);
2010                 len += 2 + sizeof(struct ieee80211_ht_cap);
2011         }
2012 #endif  /*CONFIG_IWL4965_HT */
2013
2014  fill_end:
2015         return (u16)len;
2016 }
2017
2018 /*
2019  * QoS  support
2020 */
2021 #ifdef CONFIG_IWL4965_QOS
2022 static int iwl4965_send_qos_params_command(struct iwl4965_priv *priv,
2023                                        struct iwl4965_qosparam_cmd *qos)
2024 {
2025
2026         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
2027                                 sizeof(struct iwl4965_qosparam_cmd), qos);
2028 }
2029
2030 static void iwl4965_reset_qos(struct iwl4965_priv *priv)
2031 {
2032         u16 cw_min = 15;
2033         u16 cw_max = 1023;
2034         u8 aifs = 2;
2035         u8 is_legacy = 0;
2036         unsigned long flags;
2037         int i;
2038
2039         spin_lock_irqsave(&priv->lock, flags);
2040         priv->qos_data.qos_active = 0;
2041
2042         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
2043                 if (priv->qos_data.qos_enable)
2044                         priv->qos_data.qos_active = 1;
2045                 if (!(priv->active_rate & 0xfff0)) {
2046                         cw_min = 31;
2047                         is_legacy = 1;
2048                 }
2049         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2050                 if (priv->qos_data.qos_enable)
2051                         priv->qos_data.qos_active = 1;
2052         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
2053                 cw_min = 31;
2054                 is_legacy = 1;
2055         }
2056
2057         if (priv->qos_data.qos_active)
2058                 aifs = 3;
2059
2060         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
2061         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
2062         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
2063         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
2064         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
2065
2066         if (priv->qos_data.qos_active) {
2067                 i = 1;
2068                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
2069                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
2070                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
2071                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2072                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2073
2074                 i = 2;
2075                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2076                         cpu_to_le16((cw_min + 1) / 2 - 1);
2077                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2078                         cpu_to_le16(cw_max);
2079                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2080                 if (is_legacy)
2081                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2082                                 cpu_to_le16(6016);
2083                 else
2084                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2085                                 cpu_to_le16(3008);
2086                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2087
2088                 i = 3;
2089                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2090                         cpu_to_le16((cw_min + 1) / 4 - 1);
2091                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2092                         cpu_to_le16((cw_max + 1) / 2 - 1);
2093                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2094                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2095                 if (is_legacy)
2096                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2097                                 cpu_to_le16(3264);
2098                 else
2099                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2100                                 cpu_to_le16(1504);
2101         } else {
2102                 for (i = 1; i < 4; i++) {
2103                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2104                                 cpu_to_le16(cw_min);
2105                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2106                                 cpu_to_le16(cw_max);
2107                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2108                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2109                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2110                 }
2111         }
2112         IWL_DEBUG_QOS("set QoS to default \n");
2113
2114         spin_unlock_irqrestore(&priv->lock, flags);
2115 }
2116
2117 static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
2118 {
2119         unsigned long flags;
2120
2121         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2122                 return;
2123
2124         if (!priv->qos_data.qos_enable)
2125                 return;
2126
2127         spin_lock_irqsave(&priv->lock, flags);
2128         priv->qos_data.def_qos_parm.qos_flags = 0;
2129
2130         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2131             !priv->qos_data.qos_cap.q_AP.txop_request)
2132                 priv->qos_data.def_qos_parm.qos_flags |=
2133                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2134         if (priv->qos_data.qos_active)
2135                 priv->qos_data.def_qos_parm.qos_flags |=
2136                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2137
2138 #ifdef CONFIG_IWL4965_HT
2139         if (priv->current_ht_config.is_ht)
2140                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2141 #endif /* CONFIG_IWL4965_HT */
2142
2143         spin_unlock_irqrestore(&priv->lock, flags);
2144
2145         if (force || iwl4965_is_associated(priv)) {
2146                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2147                                 priv->qos_data.qos_active,
2148                                 priv->qos_data.def_qos_parm.qos_flags);
2149
2150                 iwl4965_send_qos_params_command(priv,
2151                                 &(priv->qos_data.def_qos_parm));
2152         }
2153 }
2154
2155 #endif /* CONFIG_IWL4965_QOS */
2156 /*
2157  * Power management (not Tx power!) functions
2158  */
2159 #define MSEC_TO_USEC 1024
2160
2161 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2162 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2163 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2164 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2165                                      __constant_cpu_to_le32(X1), \
2166                                      __constant_cpu_to_le32(X2), \
2167                                      __constant_cpu_to_le32(X3), \
2168                                      __constant_cpu_to_le32(X4)}
2169
2170
2171 /* default power management (not Tx power) table values */
2172 /* for tim  0-10 */
2173 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
2174         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2175         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2176         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2177         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2178         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2179         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2180 };
2181
2182 /* for tim > 10 */
2183 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
2184         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2185         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2186                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2187         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2188                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2189         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2190                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2191         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2192         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2193                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2194 };
2195
2196 int iwl4965_power_init_handle(struct iwl4965_priv *priv)
2197 {
2198         int rc = 0, i;
2199         struct iwl4965_power_mgr *pow_data;
2200         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
2201         u16 pci_pm;
2202
2203         IWL_DEBUG_POWER("Initialize power \n");
2204
2205         pow_data = &(priv->power_data);
2206
2207         memset(pow_data, 0, sizeof(*pow_data));
2208
2209         pow_data->active_index = IWL_POWER_RANGE_0;
2210         pow_data->dtim_val = 0xffff;
2211
2212         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2213         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2214
2215         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2216         if (rc != 0)
2217                 return 0;
2218         else {
2219                 struct iwl4965_powertable_cmd *cmd;
2220
2221                 IWL_DEBUG_POWER("adjust power command flags\n");
2222
2223                 for (i = 0; i < IWL_POWER_AC; i++) {
2224                         cmd = &pow_data->pwr_range_0[i].cmd;
2225
2226                         if (pci_pm & 0x1)
2227                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2228                         else
2229                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2230                 }
2231         }
2232         return rc;
2233 }
2234
2235 static int iwl4965_update_power_cmd(struct iwl4965_priv *priv,
2236                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
2237 {
2238         int rc = 0, i;
2239         u8 skip;
2240         u32 max_sleep = 0;
2241         struct iwl4965_power_vec_entry *range;
2242         u8 period = 0;
2243         struct iwl4965_power_mgr *pow_data;
2244
2245         if (mode > IWL_POWER_INDEX_5) {
2246                 IWL_DEBUG_POWER("Error invalid power mode \n");
2247                 return -1;
2248         }
2249         pow_data = &(priv->power_data);
2250
2251         if (pow_data->active_index == IWL_POWER_RANGE_0)
2252                 range = &pow_data->pwr_range_0[0];
2253         else
2254                 range = &pow_data->pwr_range_1[1];
2255
2256         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
2257
2258 #ifdef IWL_MAC80211_DISABLE
2259         if (priv->assoc_network != NULL) {
2260                 unsigned long flags;
2261
2262                 period = priv->assoc_network->tim.tim_period;
2263         }
2264 #endif  /*IWL_MAC80211_DISABLE */
2265         skip = range[mode].no_dtim;
2266
2267         if (period == 0) {
2268                 period = 1;
2269                 skip = 0;
2270         }
2271
2272         if (skip == 0) {
2273                 max_sleep = period;
2274                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2275         } else {
2276                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2277                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2278                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2279         }
2280
2281         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2282                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2283                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2284         }
2285
2286         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2287         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2288         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2289         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2290                         le32_to_cpu(cmd->sleep_interval[0]),
2291                         le32_to_cpu(cmd->sleep_interval[1]),
2292                         le32_to_cpu(cmd->sleep_interval[2]),
2293                         le32_to_cpu(cmd->sleep_interval[3]),
2294                         le32_to_cpu(cmd->sleep_interval[4]));
2295
2296         return rc;
2297 }
2298
2299 static int iwl4965_send_power_mode(struct iwl4965_priv *priv, u32 mode)
2300 {
2301         u32 uninitialized_var(final_mode);
2302         int rc;
2303         struct iwl4965_powertable_cmd cmd;
2304
2305         /* If on battery, set to 3,
2306          * if plugged into AC power, set to CAM ("continuously aware mode"),
2307          * else user level */
2308         switch (mode) {
2309         case IWL_POWER_BATTERY:
2310                 final_mode = IWL_POWER_INDEX_3;
2311                 break;
2312         case IWL_POWER_AC:
2313                 final_mode = IWL_POWER_MODE_CAM;
2314                 break;
2315         default:
2316                 final_mode = mode;
2317                 break;
2318         }
2319
2320         cmd.keep_alive_beacons = 0;
2321
2322         iwl4965_update_power_cmd(priv, &cmd, final_mode);
2323
2324         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2325
2326         if (final_mode == IWL_POWER_MODE_CAM)
2327                 clear_bit(STATUS_POWER_PMI, &priv->status);
2328         else
2329                 set_bit(STATUS_POWER_PMI, &priv->status);
2330
2331         return rc;
2332 }
2333
2334 int iwl4965_is_network_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2335 {
2336         /* Filter incoming packets to determine if they are targeted toward
2337          * this network, discarding packets coming from ourselves */
2338         switch (priv->iw_mode) {
2339         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2340                 /* packets from our adapter are dropped (echo) */
2341                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2342                         return 0;
2343                 /* {broad,multi}cast packets to our IBSS go through */
2344                 if (is_multicast_ether_addr(header->addr1))
2345                         return !compare_ether_addr(header->addr3, priv->bssid);
2346                 /* packets to our adapter go through */
2347                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2348         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2349                 /* packets from our adapter are dropped (echo) */
2350                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2351                         return 0;
2352                 /* {broad,multi}cast packets to our BSS go through */
2353                 if (is_multicast_ether_addr(header->addr1))
2354                         return !compare_ether_addr(header->addr2, priv->bssid);
2355                 /* packets to our adapter go through */
2356                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2357         }
2358
2359         return 1;
2360 }
2361
2362 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2363
2364 static const char *iwl4965_get_tx_fail_reason(u32 status)
2365 {
2366         switch (status & TX_STATUS_MSK) {
2367         case TX_STATUS_SUCCESS:
2368                 return "SUCCESS";
2369                 TX_STATUS_ENTRY(SHORT_LIMIT);
2370                 TX_STATUS_ENTRY(LONG_LIMIT);
2371                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2372                 TX_STATUS_ENTRY(MGMNT_ABORT);
2373                 TX_STATUS_ENTRY(NEXT_FRAG);
2374                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2375                 TX_STATUS_ENTRY(DEST_PS);
2376                 TX_STATUS_ENTRY(ABORTED);
2377                 TX_STATUS_ENTRY(BT_RETRY);
2378                 TX_STATUS_ENTRY(STA_INVALID);
2379                 TX_STATUS_ENTRY(FRAG_DROPPED);
2380                 TX_STATUS_ENTRY(TID_DISABLE);
2381                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2382                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2383                 TX_STATUS_ENTRY(TX_LOCKED);
2384                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2385         }
2386
2387         return "UNKNOWN";
2388 }
2389
2390 /**
2391  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2392  *
2393  * NOTE: priv->mutex is not required before calling this function
2394  */
2395 static int iwl4965_scan_cancel(struct iwl4965_priv *priv)
2396 {
2397         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2398                 clear_bit(STATUS_SCANNING, &priv->status);
2399                 return 0;
2400         }
2401
2402         if (test_bit(STATUS_SCANNING, &priv->status)) {
2403                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2404                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2405                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2406                         queue_work(priv->workqueue, &priv->abort_scan);
2407
2408                 } else
2409                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2410
2411                 return test_bit(STATUS_SCANNING, &priv->status);
2412         }
2413
2414         return 0;
2415 }
2416
2417 /**
2418  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2419  * @ms: amount of time to wait (in milliseconds) for scan to abort
2420  *
2421  * NOTE: priv->mutex must be held before calling this function
2422  */
2423 static int iwl4965_scan_cancel_timeout(struct iwl4965_priv *priv, unsigned long ms)
2424 {
2425         unsigned long now = jiffies;
2426         int ret;
2427
2428         ret = iwl4965_scan_cancel(priv);
2429         if (ret && ms) {
2430                 mutex_unlock(&priv->mutex);
2431                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2432                                 test_bit(STATUS_SCANNING, &priv->status))
2433                         msleep(1);
2434                 mutex_lock(&priv->mutex);
2435
2436                 return test_bit(STATUS_SCANNING, &priv->status);
2437         }
2438
2439         return ret;
2440 }
2441
2442 static void iwl4965_sequence_reset(struct iwl4965_priv *priv)
2443 {
2444         /* Reset ieee stats */
2445
2446         /* We don't reset the net_device_stats (ieee->stats) on
2447          * re-association */
2448
2449         priv->last_seq_num = -1;
2450         priv->last_frag_num = -1;
2451         priv->last_packet_time = 0;
2452
2453         iwl4965_scan_cancel(priv);
2454 }
2455
2456 #define MAX_UCODE_BEACON_INTERVAL       4096
2457 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2458
2459 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2460 {
2461         u16 new_val = 0;
2462         u16 beacon_factor = 0;
2463
2464         beacon_factor =
2465             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2466                 / MAX_UCODE_BEACON_INTERVAL;
2467         new_val = beacon_val / beacon_factor;
2468
2469         return cpu_to_le16(new_val);
2470 }
2471
2472 static void iwl4965_setup_rxon_timing(struct iwl4965_priv *priv)
2473 {
2474         u64 interval_tm_unit;
2475         u64 tsf, result;
2476         unsigned long flags;
2477         struct ieee80211_conf *conf = NULL;
2478         u16 beacon_int = 0;
2479
2480         conf = ieee80211_get_hw_conf(priv->hw);
2481
2482         spin_lock_irqsave(&priv->lock, flags);
2483         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2484         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2485
2486         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2487
2488         tsf = priv->timestamp1;
2489         tsf = ((tsf << 32) | priv->timestamp0);
2490
2491         beacon_int = priv->beacon_int;
2492         spin_unlock_irqrestore(&priv->lock, flags);
2493
2494         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2495                 if (beacon_int == 0) {
2496                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2497                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2498                 } else {
2499                         priv->rxon_timing.beacon_interval =
2500                                 cpu_to_le16(beacon_int);
2501                         priv->rxon_timing.beacon_interval =
2502                             iwl4965_adjust_beacon_interval(
2503                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2504                 }
2505
2506                 priv->rxon_timing.atim_window = 0;
2507         } else {
2508                 priv->rxon_timing.beacon_interval =
2509                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2510                 /* TODO: we need to get atim_window from upper stack
2511                  * for now we set to 0 */
2512                 priv->rxon_timing.atim_window = 0;
2513         }
2514
2515         interval_tm_unit =
2516                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2517         result = do_div(tsf, interval_tm_unit);
2518         priv->rxon_timing.beacon_init_val =
2519             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2520
2521         IWL_DEBUG_ASSOC
2522             ("beacon interval %d beacon timer %d beacon tim %d\n",
2523                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2524                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2525                 le16_to_cpu(priv->rxon_timing.atim_window));
2526 }
2527
2528 static int iwl4965_scan_initiate(struct iwl4965_priv *priv)
2529 {
2530         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2531                 IWL_ERROR("APs don't scan.\n");
2532                 return 0;
2533         }
2534
2535         if (!iwl4965_is_ready_rf(priv)) {
2536                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2537                 return -EIO;
2538         }
2539
2540         if (test_bit(STATUS_SCANNING, &priv->status)) {
2541                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2542                 return -EAGAIN;
2543         }
2544
2545         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2546                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2547                                "Queuing.\n");
2548                 return -EAGAIN;
2549         }
2550
2551         IWL_DEBUG_INFO("Starting scan...\n");
2552         priv->scan_bands = 2;
2553         set_bit(STATUS_SCANNING, &priv->status);
2554         priv->scan_start = jiffies;
2555         priv->scan_pass_start = priv->scan_start;
2556
2557         queue_work(priv->workqueue, &priv->request_scan);
2558
2559         return 0;
2560 }
2561
2562 static int iwl4965_set_rxon_hwcrypto(struct iwl4965_priv *priv, int hw_decrypt)
2563 {
2564         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
2565
2566         if (hw_decrypt)
2567                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2568         else
2569                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2570
2571         return 0;
2572 }
2573
2574 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode)
2575 {
2576         if (phymode == MODE_IEEE80211A) {
2577                 priv->staging_rxon.flags &=
2578                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2579                       | RXON_FLG_CCK_MSK);
2580                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2581         } else {
2582                 /* Copied from iwl4965_bg_post_associate() */
2583                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2584                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2585                 else
2586                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2587
2588                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2589                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2590
2591                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2592                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2593                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2594         }
2595 }
2596
2597 /*
2598  * initialize rxon structure with default values from eeprom
2599  */
2600 static void iwl4965_connection_init_rx_config(struct iwl4965_priv *priv)
2601 {
2602         const struct iwl4965_channel_info *ch_info;
2603
2604         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2605
2606         switch (priv->iw_mode) {
2607         case IEEE80211_IF_TYPE_AP:
2608                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2609                 break;
2610
2611         case IEEE80211_IF_TYPE_STA:
2612                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2613                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2614                 break;
2615
2616         case IEEE80211_IF_TYPE_IBSS:
2617                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2618                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2619                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2620                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2621                 break;
2622
2623         case IEEE80211_IF_TYPE_MNTR:
2624                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2625                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2626                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2627                 break;
2628         }
2629
2630 #if 0
2631         /* TODO:  Figure out when short_preamble would be set and cache from
2632          * that */
2633         if (!hw_to_local(priv->hw)->short_preamble)
2634                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2635         else
2636                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2637 #endif
2638
2639         ch_info = iwl4965_get_channel_info(priv, priv->phymode,
2640                                        le16_to_cpu(priv->staging_rxon.channel));
2641
2642         if (!ch_info)
2643                 ch_info = &priv->channel_info[0];
2644
2645         /*
2646          * in some case A channels are all non IBSS
2647          * in this case force B/G channel
2648          */
2649         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2650             !(is_channel_ibss(ch_info)))
2651                 ch_info = &priv->channel_info[0];
2652
2653         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2654         if (is_channel_a_band(ch_info))
2655                 priv->phymode = MODE_IEEE80211A;
2656         else
2657                 priv->phymode = MODE_IEEE80211G;
2658
2659         iwl4965_set_flags_for_phymode(priv, priv->phymode);
2660
2661         priv->staging_rxon.ofdm_basic_rates =
2662             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2663         priv->staging_rxon.cck_basic_rates =
2664             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2665
2666         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2667                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2668         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2669         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2670         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2671         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2672         iwl4965_set_rxon_chain(priv);
2673 }
2674
2675 static int iwl4965_set_mode(struct iwl4965_priv *priv, int mode)
2676 {
2677         if (mode == IEEE80211_IF_TYPE_IBSS) {
2678                 const struct iwl4965_channel_info *ch_info;
2679
2680                 ch_info = iwl4965_get_channel_info(priv,
2681                         priv->phymode,
2682                         le16_to_cpu(priv->staging_rxon.channel));
2683
2684                 if (!ch_info || !is_channel_ibss(ch_info)) {
2685                         IWL_ERROR("channel %d not IBSS channel\n",
2686                                   le16_to_cpu(priv->staging_rxon.channel));
2687                         return -EINVAL;
2688                 }
2689         }
2690
2691         priv->iw_mode = mode;
2692
2693         iwl4965_connection_init_rx_config(priv);
2694         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2695
2696         iwl4965_clear_stations_table(priv);
2697
2698         /* dont commit rxon if rf-kill is on*/
2699         if (!iwl4965_is_ready_rf(priv))
2700                 return -EAGAIN;
2701
2702         cancel_delayed_work(&priv->scan_check);
2703         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2704                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2705                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2706                 return -EAGAIN;
2707         }
2708
2709         iwl4965_commit_rxon(priv);
2710
2711         return 0;
2712 }
2713
2714 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
2715                                       struct ieee80211_tx_control *ctl,
2716                                       struct iwl4965_cmd *cmd,
2717                                       struct sk_buff *skb_frag,
2718                                       int last_frag)
2719 {
2720         struct iwl4965_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2721
2722         switch (keyinfo->alg) {
2723         case ALG_CCMP:
2724                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2725                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2726                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2727                 break;
2728
2729         case ALG_TKIP:
2730 #if 0
2731                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2732
2733                 if (last_frag)
2734                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2735                                8);
2736                 else
2737                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2738 #endif
2739                 break;
2740
2741         case ALG_WEP:
2742                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2743                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2744
2745                 if (keyinfo->keylen == 13)
2746                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2747
2748                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2749
2750                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2751                              "with key %d\n", ctl->key_idx);
2752                 break;
2753
2754         default:
2755                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2756                 break;
2757         }
2758 }
2759
2760 /*
2761  * handle build REPLY_TX command notification.
2762  */
2763 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2764                                   struct iwl4965_cmd *cmd,
2765                                   struct ieee80211_tx_control *ctrl,
2766                                   struct ieee80211_hdr *hdr,
2767                                   int is_unicast, u8 std_id)
2768 {
2769         __le16 *qc;
2770         u16 fc = le16_to_cpu(hdr->frame_control);
2771         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2772
2773         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2774         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2775                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2776                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2777                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2778                 if (ieee80211_is_probe_response(fc) &&
2779                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2780                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2781         } else {
2782                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2783                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2784         }
2785
2786         if (ieee80211_is_back_request(fc))
2787                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2788
2789
2790         cmd->cmd.tx.sta_id = std_id;
2791         if (ieee80211_get_morefrag(hdr))
2792                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2793
2794         qc = ieee80211_get_qos_ctrl(hdr);
2795         if (qc) {
2796                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2797                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2798         } else
2799                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2800
2801         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2802                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2803                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2804         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2805                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2806                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2807         }
2808
2809         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2810                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2811
2812         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2813         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2814                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2815                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2816                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2817                 else
2818                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2819         } else
2820                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2821
2822         cmd->cmd.tx.driver_txop = 0;
2823         cmd->cmd.tx.tx_flags = tx_flags;
2824         cmd->cmd.tx.next_frame_len = 0;
2825 }
2826
2827 /**
2828  * iwl4965_get_sta_id - Find station's index within station table
2829  *
2830  * If new IBSS station, create new entry in station table
2831  */
2832 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2833                                 struct ieee80211_hdr *hdr)
2834 {
2835         int sta_id;
2836         u16 fc = le16_to_cpu(hdr->frame_control);
2837         DECLARE_MAC_BUF(mac);
2838
2839         /* If this frame is broadcast or management, use broadcast station id */
2840         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2841             is_multicast_ether_addr(hdr->addr1))
2842                 return priv->hw_setting.bcast_sta_id;
2843
2844         switch (priv->iw_mode) {
2845
2846         /* If we are a client station in a BSS network, use the special
2847          * AP station entry (that's the only station we communicate with) */
2848         case IEEE80211_IF_TYPE_STA:
2849                 return IWL_AP_ID;
2850
2851         /* If we are an AP, then find the station, or use BCAST */
2852         case IEEE80211_IF_TYPE_AP:
2853                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2854                 if (sta_id != IWL_INVALID_STATION)
2855                         return sta_id;
2856                 return priv->hw_setting.bcast_sta_id;
2857
2858         /* If this frame is going out to an IBSS network, find the station,
2859          * or create a new station table entry */
2860         case IEEE80211_IF_TYPE_IBSS:
2861                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2862                 if (sta_id != IWL_INVALID_STATION)
2863                         return sta_id;
2864
2865                 /* Create new station table entry */
2866                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2867                                                    0, CMD_ASYNC, NULL);
2868
2869                 if (sta_id != IWL_INVALID_STATION)
2870                         return sta_id;
2871
2872                 IWL_DEBUG_DROP("Station %s not in station map. "
2873                                "Defaulting to broadcast...\n",
2874                                print_mac(mac, hdr->addr1));
2875                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2876                 return priv->hw_setting.bcast_sta_id;
2877
2878         default:
2879                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2880                 return priv->hw_setting.bcast_sta_id;
2881         }
2882 }
2883
2884 /*
2885  * start REPLY_TX command process
2886  */
2887 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2888                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2889 {
2890         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2891         struct iwl4965_tfd_frame *tfd;
2892         u32 *control_flags;
2893         int txq_id = ctl->queue;
2894         struct iwl4965_tx_queue *txq = NULL;
2895         struct iwl4965_queue *q = NULL;
2896         dma_addr_t phys_addr;
2897         dma_addr_t txcmd_phys;
2898         dma_addr_t scratch_phys;
2899         struct iwl4965_cmd *out_cmd = NULL;
2900         u16 len, idx, len_org;
2901         u8 id, hdr_len, unicast;
2902         u8 sta_id;
2903         u16 seq_number = 0;
2904         u16 fc;
2905         __le16 *qc;
2906         u8 wait_write_ptr = 0;
2907         unsigned long flags;
2908         int rc;
2909
2910         spin_lock_irqsave(&priv->lock, flags);
2911         if (iwl4965_is_rfkill(priv)) {
2912                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2913                 goto drop_unlock;
2914         }
2915
2916         if (!priv->vif) {
2917                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2918                 goto drop_unlock;
2919         }
2920
2921         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2922                 IWL_ERROR("ERROR: No TX rate available.\n");
2923                 goto drop_unlock;
2924         }
2925
2926         unicast = !is_multicast_ether_addr(hdr->addr1);
2927         id = 0;
2928
2929         fc = le16_to_cpu(hdr->frame_control);
2930
2931 #ifdef CONFIG_IWL4965_DEBUG
2932         if (ieee80211_is_auth(fc))
2933                 IWL_DEBUG_TX("Sending AUTH frame\n");
2934         else if (ieee80211_is_assoc_request(fc))
2935                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2936         else if (ieee80211_is_reassoc_request(fc))
2937                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2938 #endif
2939
2940         /* drop all data frame if we are not associated */
2941         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2942            (!iwl4965_is_associated(priv) ||
2943             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2944             !priv->assoc_station_added)) {
2945                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2946                 goto drop_unlock;
2947         }
2948
2949         spin_unlock_irqrestore(&priv->lock, flags);
2950
2951         hdr_len = ieee80211_get_hdrlen(fc);
2952
2953         /* Find (or create) index into station table for destination station */
2954         sta_id = iwl4965_get_sta_id(priv, hdr);
2955         if (sta_id == IWL_INVALID_STATION) {
2956                 DECLARE_MAC_BUF(mac);
2957
2958                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2959                                print_mac(mac, hdr->addr1));
2960                 goto drop;
2961         }
2962
2963         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2964
2965         qc = ieee80211_get_qos_ctrl(hdr);
2966         if (qc) {
2967                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2968                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2969                                 IEEE80211_SCTL_SEQ;
2970                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2971                         (hdr->seq_ctrl &
2972                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2973                 seq_number += 0x10;
2974 #ifdef CONFIG_IWL4965_HT
2975                 /* aggregation is on for this <sta,tid> */
2976                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2977                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2978                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2979 #endif /* CONFIG_IWL4965_HT */
2980         }
2981
2982         /* Descriptor for chosen Tx queue */
2983         txq = &priv->txq[txq_id];
2984         q = &txq->q;
2985
2986         spin_lock_irqsave(&priv->lock, flags);
2987
2988         /* Set up first empty TFD within this queue's circular TFD buffer */
2989         tfd = &txq->bd[q->write_ptr];
2990         memset(tfd, 0, sizeof(*tfd));
2991         control_flags = (u32 *) tfd;
2992         idx = get_cmd_index(q, q->write_ptr, 0);
2993
2994         /* Set up driver data for this TFD */
2995         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2996         txq->txb[q->write_ptr].skb[0] = skb;
2997         memcpy(&(txq->txb[q->write_ptr].status.control),
2998                ctl, sizeof(struct ieee80211_tx_control));
2999
3000         /* Set up first empty entry in queue's array of Tx/cmd buffers */
3001         out_cmd = &txq->cmd[idx];
3002         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
3003         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
3004
3005         /*
3006          * Set up the Tx-command (not MAC!) header.
3007          * Store the chosen Tx queue and TFD index within the sequence field;
3008          * after Tx, uCode's Tx response will return this value so driver can
3009          * locate the frame within the tx queue and do post-tx processing.
3010          */
3011         out_cmd->hdr.cmd = REPLY_TX;
3012         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
3013                                 INDEX_TO_SEQ(q->write_ptr)));
3014
3015         /* Copy MAC header from skb into command buffer */
3016         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
3017
3018         /*
3019          * Use the first empty entry in this queue's command buffer array
3020          * to contain the Tx command and MAC header concatenated together
3021          * (payload data will be in another buffer).
3022          * Size of this varies, due to varying MAC header length.
3023          * If end is not dword aligned, we'll have 2 extra bytes at the end
3024          * of the MAC header (device reads on dword boundaries).
3025          * We'll tell device about this padding later.
3026          */
3027         len = priv->hw_setting.tx_cmd_len +
3028                 sizeof(struct iwl4965_cmd_header) + hdr_len;
3029
3030         len_org = len;
3031         len = (len + 3) & ~3;
3032
3033         if (len_org != len)
3034                 len_org = 1;
3035         else
3036                 len_org = 0;
3037
3038         /* Physical address of this Tx command's header (not MAC header!),
3039          * within command buffer array. */
3040         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
3041                      offsetof(struct iwl4965_cmd, hdr);
3042
3043         /* Add buffer containing Tx command and MAC(!) header to TFD's
3044          * first entry */
3045         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
3046
3047         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
3048                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
3049
3050         /* Set up TFD's 2nd entry to point directly to remainder of skb,
3051          * if any (802.11 null frames have no payload). */
3052         len = skb->len - hdr_len;
3053         if (len) {
3054                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
3055                                            len, PCI_DMA_TODEVICE);
3056                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
3057         }
3058
3059         /* Tell 4965 about any 2-byte padding after MAC header */
3060         if (len_org)
3061                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
3062
3063         /* Total # bytes to be transmitted */
3064         len = (u16)skb->len;
3065         out_cmd->cmd.tx.len = cpu_to_le16(len);
3066
3067         /* TODO need this for burst mode later on */
3068         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
3069
3070         /* set is_hcca to 0; it probably will never be implemented */
3071         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
3072
3073         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3074                 offsetof(struct iwl4965_tx_cmd, scratch);
3075         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
3076         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
3077
3078         if (!ieee80211_get_morefrag(hdr)) {
3079                 txq->need_update = 1;
3080                 if (qc) {
3081                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
3082                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
3083                 }
3084         } else {
3085                 wait_write_ptr = 1;
3086                 txq->need_update = 0;
3087         }
3088
3089         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
3090                            sizeof(out_cmd->cmd.tx));
3091
3092         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
3093                            ieee80211_get_hdrlen(fc));
3094
3095         /* Set up entry for this TFD in Tx byte-count array */
3096         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
3097
3098         /* Tell device the write index *just past* this latest filled TFD */
3099         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
3100         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
3101         spin_unlock_irqrestore(&priv->lock, flags);
3102
3103         if (rc)
3104                 return rc;
3105
3106         if ((iwl4965_queue_space(q) < q->high_mark)
3107             && priv->mac80211_registered) {
3108                 if (wait_write_ptr) {
3109                         spin_lock_irqsave(&priv->lock, flags);
3110                         txq->need_update = 1;
3111                         iwl4965_tx_queue_update_write_ptr(priv, txq);
3112                         spin_unlock_irqrestore(&priv->lock, flags);
3113                 }
3114
3115                 ieee80211_stop_queue(priv->hw, ctl->queue);
3116         }
3117
3118         return 0;
3119
3120 drop_unlock:
3121         spin_unlock_irqrestore(&priv->lock, flags);
3122 drop:
3123         return -1;
3124 }
3125
3126 static void iwl4965_set_rate(struct iwl4965_priv *priv)
3127 {
3128         const struct ieee80211_hw_mode *hw = NULL;
3129         struct ieee80211_rate *rate;
3130         int i;
3131
3132         hw = iwl4965_get_hw_mode(priv, priv->phymode);
3133         if (!hw) {
3134                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3135                 return;
3136         }
3137
3138         priv->active_rate = 0;
3139         priv->active_rate_basic = 0;
3140
3141         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3142                        hw->mode == MODE_IEEE80211A ?
3143                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3144
3145         for (i = 0; i < hw->num_rates; i++) {
3146                 rate = &(hw->rates[i]);
3147                 if ((rate->val < IWL_RATE_COUNT) &&
3148                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3149                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3150                                        rate->val, iwl4965_rates[rate->val].plcp,
3151                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3152                                        "*" : "");
3153                         priv->active_rate |= (1 << rate->val);
3154                         if (rate->flags & IEEE80211_RATE_BASIC)
3155                                 priv->active_rate_basic |= (1 << rate->val);
3156                 } else
3157                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3158                                        rate->val, iwl4965_rates[rate->val].plcp);
3159         }
3160
3161         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3162                        priv->active_rate, priv->active_rate_basic);
3163
3164         /*
3165          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3166          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3167          * OFDM
3168          */
3169         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3170                 priv->staging_rxon.cck_basic_rates =
3171                     ((priv->active_rate_basic &
3172                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3173         else
3174                 priv->staging_rxon.cck_basic_rates =
3175                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3176
3177         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3178                 priv->staging_rxon.ofdm_basic_rates =
3179                     ((priv->active_rate_basic &
3180                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3181                       IWL_FIRST_OFDM_RATE) & 0xFF;
3182         else
3183                 priv->staging_rxon.ofdm_basic_rates =
3184                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3185 }
3186
3187 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
3188 {
3189         unsigned long flags;
3190
3191         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3192                 return;
3193
3194         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3195                           disable_radio ? "OFF" : "ON");
3196
3197         if (disable_radio) {
3198                 iwl4965_scan_cancel(priv);
3199                 /* FIXME: This is a workaround for AP */
3200                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3201                         spin_lock_irqsave(&priv->lock, flags);
3202                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3203                                     CSR_UCODE_SW_BIT_RFKILL);
3204                         spin_unlock_irqrestore(&priv->lock, flags);
3205                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3206                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3207                 }
3208                 return;
3209         }
3210
3211         spin_lock_irqsave(&priv->lock, flags);
3212         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3213
3214         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3215         spin_unlock_irqrestore(&priv->lock, flags);
3216
3217         /* wake up ucode */
3218         msleep(10);
3219
3220         spin_lock_irqsave(&priv->lock, flags);
3221         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3222         if (!iwl4965_grab_nic_access(priv))
3223                 iwl4965_release_nic_access(priv);
3224         spin_unlock_irqrestore(&priv->lock, flags);
3225
3226         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3227                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3228                                   "disabled by HW switch\n");
3229                 return;
3230         }
3231
3232         queue_work(priv->workqueue, &priv->restart);
3233         return;
3234 }
3235
3236 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
3237                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3238 {
3239         u16 fc =
3240             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3241
3242         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3243                 return;
3244
3245         if (!(fc & IEEE80211_FCTL_PROTECTED))
3246                 return;
3247
3248         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3249         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3250         case RX_RES_STATUS_SEC_TYPE_TKIP:
3251                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3252                     RX_RES_STATUS_BAD_ICV_MIC)
3253                         stats->flag |= RX_FLAG_MMIC_ERROR;
3254         case RX_RES_STATUS_SEC_TYPE_WEP:
3255         case RX_RES_STATUS_SEC_TYPE_CCMP:
3256                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3257                     RX_RES_STATUS_DECRYPT_OK) {
3258                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3259                         stats->flag |= RX_FLAG_DECRYPTED;
3260                 }
3261                 break;
3262
3263         default:
3264                 break;
3265         }
3266 }
3267
3268
3269 #define IWL_PACKET_RETRY_TIME HZ
3270
3271 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
3272 {
3273         u16 sc = le16_to_cpu(header->seq_ctrl);
3274         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3275         u16 frag = sc & IEEE80211_SCTL_FRAG;
3276         u16 *last_seq, *last_frag;
3277         unsigned long *last_time;
3278
3279         switch (priv->iw_mode) {
3280         case IEEE80211_IF_TYPE_IBSS:{
3281                 struct list_head *p;
3282                 struct iwl4965_ibss_seq *entry = NULL;
3283                 u8 *mac = header->addr2;
3284                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3285
3286                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3287                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
3288                         if (!compare_ether_addr(entry->mac, mac))
3289                                 break;
3290                 }
3291                 if (p == &priv->ibss_mac_hash[index]) {
3292                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3293                         if (!entry) {
3294                                 IWL_ERROR("Cannot malloc new mac entry\n");
3295                                 return 0;
3296                         }
3297                         memcpy(entry->mac, mac, ETH_ALEN);
3298                         entry->seq_num = seq;
3299                         entry->frag_num = frag;
3300                         entry->packet_time = jiffies;
3301                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3302                         return 0;
3303                 }
3304                 last_seq = &entry->seq_num;
3305                 last_frag = &entry->frag_num;
3306                 last_time = &entry->packet_time;
3307                 break;
3308         }
3309         case IEEE80211_IF_TYPE_STA:
3310                 last_seq = &priv->last_seq_num;
3311                 last_frag = &priv->last_frag_num;
3312                 last_time = &priv->last_packet_time;
3313                 break;
3314         default:
3315                 return 0;
3316         }
3317         if ((*last_seq == seq) &&
3318             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3319                 if (*last_frag == frag)
3320                         goto drop;
3321                 if (*last_frag + 1 != frag)
3322                         /* out-of-order fragment */
3323                         goto drop;
3324         } else
3325                 *last_seq = seq;
3326
3327         *last_frag = frag;
3328         *last_time = jiffies;
3329         return 0;
3330
3331  drop:
3332         return 1;
3333 }
3334
3335 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3336
3337 #include "iwl-spectrum.h"
3338
3339 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3340 #define BEACON_TIME_MASK_HIGH   0xFF000000
3341 #define TIME_UNIT               1024
3342
3343 /*
3344  * extended beacon time format
3345  * time in usec will be changed into a 32-bit value in 8:24 format
3346  * the high 1 byte is the beacon counts
3347  * the lower 3 bytes is the time in usec within one beacon interval
3348  */
3349
3350 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3351 {
3352         u32 quot;
3353         u32 rem;
3354         u32 interval = beacon_interval * 1024;
3355
3356         if (!interval || !usec)
3357                 return 0;
3358
3359         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3360         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3361
3362         return (quot << 24) + rem;
3363 }
3364
3365 /* base is usually what we get from ucode with each received frame,
3366  * the same as HW timer counter counting down
3367  */
3368
3369 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3370 {
3371         u32 base_low = base & BEACON_TIME_MASK_LOW;
3372         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3373         u32 interval = beacon_interval * TIME_UNIT;
3374         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3375             (addon & BEACON_TIME_MASK_HIGH);
3376
3377         if (base_low > addon_low)
3378                 res += base_low - addon_low;
3379         else if (base_low < addon_low) {
3380                 res += interval + base_low - addon_low;
3381                 res += (1 << 24);
3382         } else
3383                 res += (1 << 24);
3384
3385         return cpu_to_le32(res);
3386 }
3387
3388 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3389                                struct ieee80211_measurement_params *params,
3390                                u8 type)
3391 {
3392         struct iwl4965_spectrum_cmd spectrum;
3393         struct iwl4965_rx_packet *res;
3394         struct iwl4965_host_cmd cmd = {
3395                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3396                 .data = (void *)&spectrum,
3397                 .meta.flags = CMD_WANT_SKB,
3398         };
3399         u32 add_time = le64_to_cpu(params->start_time);
3400         int rc;
3401         int spectrum_resp_status;
3402         int duration = le16_to_cpu(params->duration);
3403
3404         if (iwl4965_is_associated(priv))
3405                 add_time =
3406                     iwl4965_usecs_to_beacons(
3407                         le64_to_cpu(params->start_time) - priv->last_tsf,
3408                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3409
3410         memset(&spectrum, 0, sizeof(spectrum));
3411
3412         spectrum.channel_count = cpu_to_le16(1);
3413         spectrum.flags =
3414             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3415         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3416         cmd.len = sizeof(spectrum);
3417         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3418
3419         if (iwl4965_is_associated(priv))
3420                 spectrum.start_time =
3421                     iwl4965_add_beacon_time(priv->last_beacon_time,
3422                                 add_time,
3423                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3424         else
3425                 spectrum.start_time = 0;
3426
3427         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3428         spectrum.channels[0].channel = params->channel;
3429         spectrum.channels[0].type = type;
3430         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3431                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3432                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3433
3434         rc = iwl4965_send_cmd_sync(priv, &cmd);
3435         if (rc)
3436                 return rc;
3437
3438         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3439         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3440                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3441                 rc = -EIO;
3442         }
3443
3444         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3445         switch (spectrum_resp_status) {
3446         case 0:         /* Command will be handled */
3447                 if (res->u.spectrum.id != 0xff) {
3448                         IWL_DEBUG_INFO
3449                             ("Replaced existing measurement: %d\n",
3450                              res->u.spectrum.id);
3451                         priv->measurement_status &= ~MEASUREMENT_READY;
3452                 }
3453                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3454                 rc = 0;
3455                 break;
3456
3457         case 1:         /* Command will not be handled */
3458                 rc = -EAGAIN;
3459                 break;
3460         }
3461
3462         dev_kfree_skb_any(cmd.meta.u.skb);
3463
3464         return rc;
3465 }
3466 #endif
3467
3468 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3469                                  struct iwl4965_tx_info *tx_sta)
3470 {
3471
3472         tx_sta->status.ack_signal = 0;
3473         tx_sta->status.excessive_retries = 0;
3474         tx_sta->status.queue_length = 0;
3475         tx_sta->status.queue_number = 0;
3476
3477         if (in_interrupt())
3478                 ieee80211_tx_status_irqsafe(priv->hw,
3479                                             tx_sta->skb[0], &(tx_sta->status));
3480         else
3481                 ieee80211_tx_status(priv->hw,
3482                                     tx_sta->skb[0], &(tx_sta->status));
3483
3484         tx_sta->skb[0] = NULL;
3485 }
3486
3487 /**
3488  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3489  *
3490  * When FW advances 'R' index, all entries between old and new 'R' index
3491  * need to be reclaimed. As result, some free space forms.  If there is
3492  * enough free space (> low mark), wake the stack that feeds us.
3493  */
3494 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3495 {
3496         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3497         struct iwl4965_queue *q = &txq->q;
3498         int nfreed = 0;
3499
3500         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3501                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3502                           "is out of range [0-%d] %d %d.\n", txq_id,
3503                           index, q->n_bd, q->write_ptr, q->read_ptr);
3504                 return 0;
3505         }
3506
3507         for (index = iwl4965_queue_inc_wrap(index, q->n_bd);
3508                 q->read_ptr != index;
3509                 q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3510                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3511                         iwl4965_txstatus_to_ieee(priv,
3512                                         &(txq->txb[txq->q.read_ptr]));
3513                         iwl4965_hw_txq_free_tfd(priv, txq);
3514                 } else if (nfreed > 1) {
3515                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3516                                         q->write_ptr, q->read_ptr);
3517                         queue_work(priv->workqueue, &priv->restart);
3518                 }
3519                 nfreed++;
3520         }
3521
3522 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3523                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3524                         priv->mac80211_registered)
3525                 ieee80211_wake_queue(priv->hw, txq_id); */
3526
3527
3528         return nfreed;
3529 }
3530
3531 static int iwl4965_is_tx_success(u32 status)
3532 {
3533         status &= TX_STATUS_MSK;
3534         return (status == TX_STATUS_SUCCESS)
3535             || (status == TX_STATUS_DIRECT_DONE);
3536 }
3537
3538 /******************************************************************************
3539  *
3540  * Generic RX handler implementations
3541  *
3542  ******************************************************************************/
3543 #ifdef CONFIG_IWL4965_HT
3544
3545 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3546                                     struct ieee80211_hdr *hdr)
3547 {
3548         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3549                 return IWL_AP_ID;
3550         else {
3551                 u8 *da = ieee80211_get_DA(hdr);
3552                 return iwl4965_hw_find_station(priv, da);
3553         }
3554 }
3555
3556 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3557         struct iwl4965_priv *priv, int txq_id, int idx)
3558 {
3559         if (priv->txq[txq_id].txb[idx].skb[0])
3560                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3561                                 txb[idx].skb[0]->data;
3562         return NULL;
3563 }
3564
3565 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3566 {
3567         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3568                                 tx_resp->frame_count);
3569         return le32_to_cpu(*scd_ssn) & MAX_SN;
3570
3571 }
3572
3573 /**
3574  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3575  */
3576 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3577                                       struct iwl4965_ht_agg *agg,
3578                                       struct iwl4965_tx_resp_agg *tx_resp,
3579                                       u16 start_idx)
3580 {
3581         u16 status;
3582         struct agg_tx_status *frame_status = &tx_resp->status;
3583         struct ieee80211_tx_status *tx_status = NULL;
3584         struct ieee80211_hdr *hdr = NULL;
3585         int i, sh;
3586         int txq_id, idx;
3587         u16 seq;
3588
3589         if (agg->wait_for_ba)
3590                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3591
3592         agg->frame_count = tx_resp->frame_count;
3593         agg->start_idx = start_idx;
3594         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3595         agg->bitmap = 0;
3596
3597         /* # frames attempted by Tx command */
3598         if (agg->frame_count == 1) {
3599                 /* Only one frame was attempted; no block-ack will arrive */
3600                 status = le16_to_cpu(frame_status[0].status);
3601                 seq  = le16_to_cpu(frame_status[0].sequence);
3602                 idx = SEQ_TO_INDEX(seq);
3603                 txq_id = SEQ_TO_QUEUE(seq);
3604
3605                 /* FIXME: code repetition */
3606                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3607                                    agg->frame_count, agg->start_idx, idx);
3608
3609                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3610                 tx_status->retry_count = tx_resp->failure_frame;
3611                 tx_status->queue_number = status & 0xff;
3612                 tx_status->queue_length = tx_resp->failure_rts;
3613                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3614                 tx_status->flags = iwl4965_is_tx_success(status)?
3615                         IEEE80211_TX_STATUS_ACK : 0;
3616                 tx_status->control.tx_rate =
3617                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3618                 /* FIXME: code repetition end */
3619
3620                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3621                                     status & 0xff, tx_resp->failure_frame);
3622                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3623                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3624
3625                 agg->wait_for_ba = 0;
3626         } else {
3627                 /* Two or more frames were attempted; expect block-ack */
3628                 u64 bitmap = 0;
3629                 int start = agg->start_idx;
3630
3631                 /* Construct bit-map of pending frames within Tx window */
3632                 for (i = 0; i < agg->frame_count; i++) {
3633                         u16 sc;
3634                         status = le16_to_cpu(frame_status[i].status);
3635                         seq  = le16_to_cpu(frame_status[i].sequence);
3636                         idx = SEQ_TO_INDEX(seq);
3637                         txq_id = SEQ_TO_QUEUE(seq);
3638
3639                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3640                                       AGG_TX_STATE_ABORT_MSK))
3641                                 continue;
3642
3643                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3644                                            agg->frame_count, txq_id, idx);
3645
3646                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3647
3648                         sc = le16_to_cpu(hdr->seq_ctrl);
3649                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3650                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3651                                           " idx=%d, seq_idx=%d, seq=%d\n",
3652                                           idx, SEQ_TO_SN(sc),
3653                                           hdr->seq_ctrl);
3654                                 return -1;
3655                         }
3656
3657                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3658                                            i, idx, SEQ_TO_SN(sc));
3659
3660                         sh = idx - start;
3661                         if (sh > 64) {
3662                                 sh = (start - idx) + 0xff;
3663                                 bitmap = bitmap << sh;
3664                                 sh = 0;
3665                                 start = idx;
3666                         } else if (sh < -64)
3667                                 sh  = 0xff - (start - idx);
3668                         else if (sh < 0) {
3669                                 sh = start - idx;
3670                                 start = idx;
3671                                 bitmap = bitmap << sh;
3672                                 sh = 0;
3673                         }
3674                         bitmap |= (1 << sh);
3675                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3676                                            start, (u32)(bitmap & 0xFFFFFFFF));
3677                 }
3678
3679                 agg->bitmap = bitmap;
3680                 agg->start_idx = start;
3681                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3682                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3683                                    agg->frame_count, agg->start_idx,
3684                                    agg->bitmap);
3685
3686                 if (bitmap)
3687                         agg->wait_for_ba = 1;
3688         }
3689         return 0;
3690 }
3691 #endif
3692
3693 /**
3694  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3695  */
3696 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3697                             struct iwl4965_rx_mem_buffer *rxb)
3698 {
3699         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3700         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3701         int txq_id = SEQ_TO_QUEUE(sequence);
3702         int index = SEQ_TO_INDEX(sequence);
3703         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3704         struct ieee80211_tx_status *tx_status;
3705         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3706         u32  status = le32_to_cpu(tx_resp->status);
3707 #ifdef CONFIG_IWL4965_HT
3708         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3709         struct ieee80211_hdr *hdr;
3710         __le16 *qc;
3711 #endif
3712
3713         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3714                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3715                           "is out of range [0-%d] %d %d\n", txq_id,
3716                           index, txq->q.n_bd, txq->q.write_ptr,
3717                           txq->q.read_ptr);
3718                 return;
3719         }
3720
3721 #ifdef CONFIG_IWL4965_HT
3722         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3723         qc = ieee80211_get_qos_ctrl(hdr);
3724
3725         if (qc)
3726                 tid = le16_to_cpu(*qc) & 0xf;
3727
3728         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3729         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3730                 IWL_ERROR("Station not known\n");
3731                 return;
3732         }
3733
3734         if (txq->sched_retry) {
3735                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3736                 struct iwl4965_ht_agg *agg = NULL;
3737
3738                 if (!qc)
3739                         return;
3740
3741                 agg = &priv->stations[sta_id].tid[tid].agg;
3742
3743                 iwl4965_tx_status_reply_tx(priv, agg,
3744                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3745
3746                 if ((tx_resp->frame_count == 1) &&
3747                     !iwl4965_is_tx_success(status)) {
3748                         /* TODO: send BAR */
3749                 }
3750
3751                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3752                         int freed;
3753                         index = iwl4965_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3754                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3755                                            "%d index %d\n", scd_ssn , index);
3756                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3757                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3758
3759                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3760                             txq_id >= 0 && priv->mac80211_registered &&
3761                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3762                                 ieee80211_wake_queue(priv->hw, txq_id);
3763
3764                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3765                 }
3766         } else {
3767 #endif /* CONFIG_IWL4965_HT */
3768         tx_status = &(txq->txb[txq->q.read_ptr].status);
3769
3770         tx_status->retry_count = tx_resp->failure_frame;
3771         tx_status->queue_number = status;
3772         tx_status->queue_length = tx_resp->bt_kill_count;
3773         tx_status->queue_length |= tx_resp->failure_rts;
3774
3775         tx_status->flags =
3776             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3777
3778         tx_status->control.tx_rate =
3779                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3780
3781         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3782                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3783                      status, le32_to_cpu(tx_resp->rate_n_flags),
3784                      tx_resp->failure_frame);
3785
3786         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3787         if (index != -1) {
3788                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3789 #ifdef CONFIG_IWL4965_HT
3790                 if (tid != MAX_TID_COUNT)
3791                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3792                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3793                         (txq_id >= 0) &&
3794                         priv->mac80211_registered)
3795                         ieee80211_wake_queue(priv->hw, txq_id);
3796                 if (tid != MAX_TID_COUNT)
3797                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3798 #endif
3799         }
3800 #ifdef CONFIG_IWL4965_HT
3801         }
3802 #endif /* CONFIG_IWL4965_HT */
3803
3804         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3805                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3806 }
3807
3808
3809 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3810                                struct iwl4965_rx_mem_buffer *rxb)
3811 {
3812         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3813         struct iwl4965_alive_resp *palive;
3814         struct delayed_work *pwork;
3815
3816         palive = &pkt->u.alive_frame;
3817
3818         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3819                        "0x%01X 0x%01X\n",
3820                        palive->is_valid, palive->ver_type,
3821                        palive->ver_subtype);
3822
3823         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3824                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3825                 memcpy(&priv->card_alive_init,
3826                        &pkt->u.alive_frame,
3827                        sizeof(struct iwl4965_init_alive_resp));
3828                 pwork = &priv->init_alive_start;
3829         } else {
3830                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3831                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3832                        sizeof(struct iwl4965_alive_resp));
3833                 pwork = &priv->alive_start;
3834         }
3835
3836         /* We delay the ALIVE response by 5ms to
3837          * give the HW RF Kill time to activate... */
3838         if (palive->is_valid == UCODE_VALID_OK)
3839                 queue_delayed_work(priv->workqueue, pwork,
3840                                    msecs_to_jiffies(5));
3841         else
3842                 IWL_WARNING("uCode did not respond OK.\n");
3843 }
3844
3845 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3846                                  struct iwl4965_rx_mem_buffer *rxb)
3847 {
3848         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3849
3850         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3851         return;
3852 }
3853
3854 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3855                                struct iwl4965_rx_mem_buffer *rxb)
3856 {
3857         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3858
3859         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3860                 "seq 0x%04X ser 0x%08X\n",
3861                 le32_to_cpu(pkt->u.err_resp.error_type),
3862                 get_cmd_string(pkt->u.err_resp.cmd_id),
3863                 pkt->u.err_resp.cmd_id,
3864                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3865                 le32_to_cpu(pkt->u.err_resp.error_info));
3866 }
3867
3868 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3869
3870 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3871 {
3872         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3873         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3874         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3875         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3876                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3877         rxon->channel = csa->channel;
3878         priv->staging_rxon.channel = csa->channel;
3879 }
3880
3881 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3882                                           struct iwl4965_rx_mem_buffer *rxb)
3883 {
3884 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3885         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3886         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3887
3888         if (!report->state) {
3889                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3890                           "Spectrum Measure Notification: Start\n");
3891                 return;
3892         }
3893
3894         memcpy(&priv->measure_report, report, sizeof(*report));
3895         priv->measurement_status |= MEASUREMENT_READY;
3896 #endif
3897 }
3898
3899 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3900                                   struct iwl4965_rx_mem_buffer *rxb)
3901 {
3902 #ifdef CONFIG_IWL4965_DEBUG
3903         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3904         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3905         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3906                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3907 #endif
3908 }
3909
3910 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3911                                              struct iwl4965_rx_mem_buffer *rxb)
3912 {
3913         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3914         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3915                         "notification for %s:\n",
3916                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3917         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3918 }
3919
3920 static void iwl4965_bg_beacon_update(struct work_struct *work)
3921 {
3922         struct iwl4965_priv *priv =
3923                 container_of(work, struct iwl4965_priv, beacon_update);
3924         struct sk_buff *beacon;
3925
3926         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3927         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3928
3929         if (!beacon) {
3930                 IWL_ERROR("update beacon failed\n");
3931                 return;
3932         }
3933
3934         mutex_lock(&priv->mutex);
3935         /* new beacon skb is allocated every time; dispose previous.*/
3936         if (priv->ibss_beacon)
3937                 dev_kfree_skb(priv->ibss_beacon);
3938
3939         priv->ibss_beacon = beacon;
3940         mutex_unlock(&priv->mutex);
3941
3942         iwl4965_send_beacon_cmd(priv);
3943 }
3944
3945 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3946                                 struct iwl4965_rx_mem_buffer *rxb)
3947 {
3948 #ifdef CONFIG_IWL4965_DEBUG
3949         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3950         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3951         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3952
3953         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3954                 "tsf %d %d rate %d\n",
3955                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3956                 beacon->beacon_notify_hdr.failure_frame,
3957                 le32_to_cpu(beacon->ibss_mgr_status),
3958                 le32_to_cpu(beacon->high_tsf),
3959                 le32_to_cpu(beacon->low_tsf), rate);
3960 #endif
3961
3962         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3963             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3964                 queue_work(priv->workqueue, &priv->beacon_update);
3965 }
3966
3967 /* Service response to REPLY_SCAN_CMD (0x80) */
3968 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3969                               struct iwl4965_rx_mem_buffer *rxb)
3970 {
3971 #ifdef CONFIG_IWL4965_DEBUG
3972         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3973         struct iwl4965_scanreq_notification *notif =
3974             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3975
3976         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3977 #endif
3978 }
3979
3980 /* Service SCAN_START_NOTIFICATION (0x82) */
3981 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3982                                     struct iwl4965_rx_mem_buffer *rxb)
3983 {
3984         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3985         struct iwl4965_scanstart_notification *notif =
3986             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3987         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3988         IWL_DEBUG_SCAN("Scan start: "
3989                        "%d [802.11%s] "
3990                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3991                        notif->channel,
3992                        notif->band ? "bg" : "a",
3993                        notif->tsf_high,
3994                        notif->tsf_low, notif->status, notif->beacon_timer);
3995 }
3996
3997 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3998 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3999                                       struct iwl4965_rx_mem_buffer *rxb)
4000 {
4001         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4002         struct iwl4965_scanresults_notification *notif =
4003             (struct iwl4965_scanresults_notification *)pkt->u.raw;
4004
4005         IWL_DEBUG_SCAN("Scan ch.res: "
4006                        "%d [802.11%s] "
4007                        "(TSF: 0x%08X:%08X) - %d "
4008                        "elapsed=%lu usec (%dms since last)\n",
4009                        notif->channel,
4010                        notif->band ? "bg" : "a",
4011                        le32_to_cpu(notif->tsf_high),
4012                        le32_to_cpu(notif->tsf_low),
4013                        le32_to_cpu(notif->statistics[0]),
4014                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
4015                        jiffies_to_msecs(elapsed_jiffies
4016                                         (priv->last_scan_jiffies, jiffies)));
4017
4018         priv->last_scan_jiffies = jiffies;
4019         priv->next_scan_jiffies = 0;
4020 }
4021
4022 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
4023 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
4024                                        struct iwl4965_rx_mem_buffer *rxb)
4025 {
4026         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4027         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
4028
4029         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
4030                        scan_notif->scanned_channels,
4031                        scan_notif->tsf_low,
4032                        scan_notif->tsf_high, scan_notif->status);
4033
4034         /* The HW is no longer scanning */
4035         clear_bit(STATUS_SCAN_HW, &priv->status);
4036
4037         /* The scan completion notification came in, so kill that timer... */
4038         cancel_delayed_work(&priv->scan_check);
4039
4040         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
4041                        (priv->scan_bands == 2) ? "2.4" : "5.2",
4042                        jiffies_to_msecs(elapsed_jiffies
4043                                         (priv->scan_pass_start, jiffies)));
4044
4045         /* Remove this scanned band from the list
4046          * of pending bands to scan */
4047         priv->scan_bands--;
4048
4049         /* If a request to abort was given, or the scan did not succeed
4050          * then we reset the scan state machine and terminate,
4051          * re-queuing another scan if one has been requested */
4052         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4053                 IWL_DEBUG_INFO("Aborted scan completed.\n");
4054                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
4055         } else {
4056                 /* If there are more bands on this scan pass reschedule */
4057                 if (priv->scan_bands > 0)
4058                         goto reschedule;
4059         }
4060
4061         priv->last_scan_jiffies = jiffies;
4062         priv->next_scan_jiffies = 0;
4063         IWL_DEBUG_INFO("Setting scan to off\n");
4064
4065         clear_bit(STATUS_SCANNING, &priv->status);
4066
4067         IWL_DEBUG_INFO("Scan took %dms\n",
4068                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4069
4070         queue_work(priv->workqueue, &priv->scan_completed);
4071
4072         return;
4073
4074 reschedule:
4075         priv->scan_pass_start = jiffies;
4076         queue_work(priv->workqueue, &priv->request_scan);
4077 }
4078
4079 /* Handle notification from uCode that card's power state is changing
4080  * due to software, hardware, or critical temperature RFKILL */
4081 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
4082                                     struct iwl4965_rx_mem_buffer *rxb)
4083 {
4084         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4085         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4086         unsigned long status = priv->status;
4087
4088         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4089                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4090                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4091
4092         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4093                      RF_CARD_DISABLED)) {
4094
4095                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4096                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4097
4098                 if (!iwl4965_grab_nic_access(priv)) {
4099                         iwl4965_write_direct32(
4100                                 priv, HBUS_TARG_MBX_C,
4101                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4102
4103                         iwl4965_release_nic_access(priv);
4104                 }
4105
4106                 if (!(flags & RXON_CARD_DISABLED)) {
4107                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4108                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4109                         if (!iwl4965_grab_nic_access(priv)) {
4110                                 iwl4965_write_direct32(
4111                                         priv, HBUS_TARG_MBX_C,
4112                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4113
4114                                 iwl4965_release_nic_access(priv);
4115                         }
4116                 }
4117
4118                 if (flags & RF_CARD_DISABLED) {
4119                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4120                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4121                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4122                         if (!iwl4965_grab_nic_access(priv))
4123                                 iwl4965_release_nic_access(priv);
4124                 }
4125         }
4126
4127         if (flags & HW_CARD_DISABLED)
4128                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4129         else
4130                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4131
4132
4133         if (flags & SW_CARD_DISABLED)
4134                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4135         else
4136                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4137
4138         if (!(flags & RXON_CARD_DISABLED))
4139                 iwl4965_scan_cancel(priv);
4140
4141         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4142              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4143             (test_bit(STATUS_RF_KILL_SW, &status) !=
4144              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4145                 queue_work(priv->workqueue, &priv->rf_kill);
4146         else
4147                 wake_up_interruptible(&priv->wait_command_queue);
4148 }
4149
4150 /**
4151  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
4152  *
4153  * Setup the RX handlers for each of the reply types sent from the uCode
4154  * to the host.
4155  *
4156  * This function chains into the hardware specific files for them to setup
4157  * any hardware specific handlers as well.
4158  */
4159 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
4160 {
4161         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
4162         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
4163         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
4164         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
4165         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4166             iwl4965_rx_spectrum_measure_notif;
4167         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
4168         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4169             iwl4965_rx_pm_debug_statistics_notif;
4170         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
4171
4172         /*
4173          * The same handler is used for both the REPLY to a discrete
4174          * statistics request from the host as well as for the periodic
4175          * statistics notifications (after received beacons) from the uCode.
4176          */
4177         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
4178         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
4179
4180         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
4181         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
4182         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4183             iwl4965_rx_scan_results_notif;
4184         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4185             iwl4965_rx_scan_complete_notif;
4186         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
4187         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
4188
4189         /* Set up hardware specific Rx handlers */
4190         iwl4965_hw_rx_handler_setup(priv);
4191 }
4192
4193 /**
4194  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4195  * @rxb: Rx buffer to reclaim
4196  *
4197  * If an Rx buffer has an async callback associated with it the callback
4198  * will be executed.  The attached skb (if present) will only be freed
4199  * if the callback returns 1
4200  */
4201 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
4202                                 struct iwl4965_rx_mem_buffer *rxb)
4203 {
4204         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4205         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4206         int txq_id = SEQ_TO_QUEUE(sequence);
4207         int index = SEQ_TO_INDEX(sequence);
4208         int huge = sequence & SEQ_HUGE_FRAME;
4209         int cmd_index;
4210         struct iwl4965_cmd *cmd;
4211
4212         /* If a Tx command is being handled and it isn't in the actual
4213          * command queue then there a command routing bug has been introduced
4214          * in the queue management code. */
4215         if (txq_id != IWL_CMD_QUEUE_NUM)
4216                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4217                           txq_id, pkt->hdr.cmd);
4218         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4219
4220         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4221         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4222
4223         /* Input error checking is done when commands are added to queue. */
4224         if (cmd->meta.flags & CMD_WANT_SKB) {
4225                 cmd->meta.source->u.skb = rxb->skb;
4226                 rxb->skb = NULL;
4227         } else if (cmd->meta.u.callback &&
4228                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4229                 rxb->skb = NULL;
4230
4231         iwl4965_tx_queue_reclaim(priv, txq_id, index);
4232
4233         if (!(cmd->meta.flags & CMD_ASYNC)) {
4234                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4235                 wake_up_interruptible(&priv->wait_command_queue);
4236         }
4237 }
4238
4239 /************************** RX-FUNCTIONS ****************************/
4240 /*
4241  * Rx theory of operation
4242  *
4243  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
4244  * each of which point to Receive Buffers to be filled by 4965.  These get
4245  * used not only for Rx frames, but for any command response or notification
4246  * from the 4965.  The driver and 4965 manage the Rx buffers by means
4247  * of indexes into the circular buffer.
4248  *
4249  * Rx Queue Indexes
4250  * The host/firmware share two index registers for managing the Rx buffers.
4251  *
4252  * The READ index maps to the first position that the firmware may be writing
4253  * to -- the driver can read up to (but not including) this position and get
4254  * good data.
4255  * The READ index is managed by the firmware once the card is enabled.
4256  *
4257  * The WRITE index maps to the last position the driver has read from -- the
4258  * position preceding WRITE is the last slot the firmware can place a packet.
4259  *
4260  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4261  * WRITE = READ.
4262  *
4263  * During initialization, the host sets up the READ queue position to the first
4264  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4265  *
4266  * When the firmware places a packet in a buffer, it will advance the READ index
4267  * and fire the RX interrupt.  The driver can then query the READ index and
4268  * process as many packets as possible, moving the WRITE index forward as it
4269  * resets the Rx queue buffers with new memory.
4270  *
4271  * The management in the driver is as follows:
4272  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4273  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4274  *   to replenish the iwl->rxq->rx_free.
4275  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
4276  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4277  *   'processed' and 'read' driver indexes as well)
4278  * + A received packet is processed and handed to the kernel network stack,
4279  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4280  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4281  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4282  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4283  *   were enough free buffers and RX_STALLED is set it is cleared.
4284  *
4285  *
4286  * Driver sequence:
4287  *
4288  * iwl4965_rx_queue_alloc()   Allocates rx_free
4289  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
4290  *                            iwl4965_rx_queue_restock
4291  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
4292  *                            queue, updates firmware pointers, and updates
4293  *                            the WRITE index.  If insufficient rx_free buffers
4294  *                            are available, schedules iwl4965_rx_replenish
4295  *
4296  * -- enable interrupts --
4297  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
4298  *                            READ INDEX, detaching the SKB from the pool.
4299  *                            Moves the packet buffer from queue to rx_used.
4300  *                            Calls iwl4965_rx_queue_restock to refill any empty
4301  *                            slots.
4302  * ...
4303  *
4304  */
4305
4306 /**
4307  * iwl4965_rx_queue_space - Return number of free slots available in queue.
4308  */
4309 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
4310 {
4311         int s = q->read - q->write;
4312         if (s <= 0)
4313                 s += RX_QUEUE_SIZE;
4314         /* keep some buffer to not confuse full and empty queue */
4315         s -= 2;
4316         if (s < 0)
4317                 s = 0;
4318         return s;
4319 }
4320
4321 /**
4322  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4323  */
4324 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4325 {
4326         u32 reg = 0;
4327         int rc = 0;
4328         unsigned long flags;
4329
4330         spin_lock_irqsave(&q->lock, flags);
4331
4332         if (q->need_update == 0)
4333                 goto exit_unlock;
4334
4335         /* If power-saving is in use, make sure device is awake */
4336         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4337                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4338
4339                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4340                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4341                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4342                         goto exit_unlock;
4343                 }
4344
4345                 rc = iwl4965_grab_nic_access(priv);
4346                 if (rc)
4347                         goto exit_unlock;
4348
4349                 /* Device expects a multiple of 8 */
4350                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4351                                      q->write & ~0x7);
4352                 iwl4965_release_nic_access(priv);
4353
4354         /* Else device is assumed to be awake */
4355         } else
4356                 /* Device expects a multiple of 8 */
4357                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4358
4359
4360         q->need_update = 0;
4361
4362  exit_unlock:
4363         spin_unlock_irqrestore(&q->lock, flags);
4364         return rc;
4365 }
4366
4367 /**
4368  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4369  */
4370 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4371                                           dma_addr_t dma_addr)
4372 {
4373         return cpu_to_le32((u32)(dma_addr >> 8));
4374 }
4375
4376
4377 /**
4378  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4379  *
4380  * If there are slots in the RX queue that need to be restocked,
4381  * and we have free pre-allocated buffers, fill the ranks as much
4382  * as we can, pulling from rx_free.
4383  *
4384  * This moves the 'write' index forward to catch up with 'processed', and
4385  * also updates the memory address in the firmware to reference the new
4386  * target buffer.
4387  */
4388 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4389 {
4390         struct iwl4965_rx_queue *rxq = &priv->rxq;
4391         struct list_head *element;
4392         struct iwl4965_rx_mem_buffer *rxb;
4393         unsigned long flags;
4394         int write, rc;
4395
4396         spin_lock_irqsave(&rxq->lock, flags);
4397         write = rxq->write & ~0x7;
4398         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4399                 /* Get next free Rx buffer, remove from free list */
4400                 element = rxq->rx_free.next;
4401                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4402                 list_del(element);
4403
4404                 /* Point to Rx buffer via next RBD in circular buffer */
4405                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4406                 rxq->queue[rxq->write] = rxb;
4407                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4408                 rxq->free_count--;
4409         }
4410         spin_unlock_irqrestore(&rxq->lock, flags);
4411         /* If the pre-allocated buffer pool is dropping low, schedule to
4412          * refill it */
4413         if (rxq->free_count <= RX_LOW_WATERMARK)
4414                 queue_work(priv->workqueue, &priv->rx_replenish);
4415
4416
4417         /* If we've added more space for the firmware to place data, tell it.
4418          * Increment device's write pointer in multiples of 8. */
4419         if ((write != (rxq->write & ~0x7))
4420             || (abs(rxq->write - rxq->read) > 7)) {
4421                 spin_lock_irqsave(&rxq->lock, flags);
4422                 rxq->need_update = 1;
4423                 spin_unlock_irqrestore(&rxq->lock, flags);
4424                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4425                 if (rc)
4426                         return rc;
4427         }
4428
4429         return 0;
4430 }
4431
4432 /**
4433  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4434  *
4435  * When moving to rx_free an SKB is allocated for the slot.
4436  *
4437  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4438  * This is called as a scheduled work item (except for during initialization)
4439  */
4440 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4441 {
4442         struct iwl4965_rx_queue *rxq = &priv->rxq;
4443         struct list_head *element;
4444         struct iwl4965_rx_mem_buffer *rxb;
4445         unsigned long flags;
4446         spin_lock_irqsave(&rxq->lock, flags);
4447         while (!list_empty(&rxq->rx_used)) {
4448                 element = rxq->rx_used.next;
4449                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4450
4451                 /* Alloc a new receive buffer */
4452                 rxb->skb =
4453                     alloc_skb(priv->hw_setting.rx_buf_size,
4454                                 __GFP_NOWARN | GFP_ATOMIC);
4455                 if (!rxb->skb) {
4456                         if (net_ratelimit())
4457                                 printk(KERN_CRIT DRV_NAME
4458                                        ": Can not allocate SKB buffers\n");
4459                         /* We don't reschedule replenish work here -- we will
4460                          * call the restock method and if it still needs
4461                          * more buffers it will schedule replenish */
4462                         break;
4463                 }
4464                 priv->alloc_rxb_skb++;
4465                 list_del(element);
4466
4467                 /* Get physical address of RB/SKB */
4468                 rxb->dma_addr =
4469                     pci_map_single(priv->pci_dev, rxb->skb->data,
4470                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4471                 list_add_tail(&rxb->list, &rxq->rx_free);
4472                 rxq->free_count++;
4473         }
4474         spin_unlock_irqrestore(&rxq->lock, flags);
4475 }
4476
4477 /*
4478  * this should be called while priv->lock is locked
4479 */
4480 static void __iwl4965_rx_replenish(void *data)
4481 {
4482         struct iwl4965_priv *priv = data;
4483
4484         iwl4965_rx_allocate(priv);
4485         iwl4965_rx_queue_restock(priv);
4486 }
4487
4488
4489 void iwl4965_rx_replenish(void *data)
4490 {
4491         struct iwl4965_priv *priv = data;
4492         unsigned long flags;
4493
4494         iwl4965_rx_allocate(priv);
4495
4496         spin_lock_irqsave(&priv->lock, flags);
4497         iwl4965_rx_queue_restock(priv);
4498         spin_unlock_irqrestore(&priv->lock, flags);
4499 }
4500
4501 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4502  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4503  * This free routine walks the list of POOL entries and if SKB is set to
4504  * non NULL it is unmapped and freed
4505  */
4506 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4507 {
4508         int i;
4509         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4510                 if (rxq->pool[i].skb != NULL) {
4511                         pci_unmap_single(priv->pci_dev,
4512                                          rxq->pool[i].dma_addr,
4513                                          priv->hw_setting.rx_buf_size,
4514                                          PCI_DMA_FROMDEVICE);
4515                         dev_kfree_skb(rxq->pool[i].skb);
4516                 }
4517         }
4518
4519         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4520                             rxq->dma_addr);
4521         rxq->bd = NULL;
4522 }
4523
4524 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4525 {
4526         struct iwl4965_rx_queue *rxq = &priv->rxq;
4527         struct pci_dev *dev = priv->pci_dev;
4528         int i;
4529
4530         spin_lock_init(&rxq->lock);
4531         INIT_LIST_HEAD(&rxq->rx_free);
4532         INIT_LIST_HEAD(&rxq->rx_used);
4533
4534         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4535         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4536         if (!rxq->bd)
4537                 return -ENOMEM;
4538
4539         /* Fill the rx_used queue with _all_ of the Rx buffers */
4540         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4541                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4542
4543         /* Set us so that we have processed and used all buffers, but have
4544          * not restocked the Rx queue with fresh buffers */
4545         rxq->read = rxq->write = 0;
4546         rxq->free_count = 0;
4547         rxq->need_update = 0;
4548         return 0;
4549 }
4550
4551 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4552 {
4553         unsigned long flags;
4554         int i;
4555         spin_lock_irqsave(&rxq->lock, flags);
4556         INIT_LIST_HEAD(&rxq->rx_free);
4557         INIT_LIST_HEAD(&rxq->rx_used);
4558         /* Fill the rx_used queue with _all_ of the Rx buffers */
4559         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4560                 /* In the reset function, these buffers may have been allocated
4561                  * to an SKB, so we need to unmap and free potential storage */
4562                 if (rxq->pool[i].skb != NULL) {
4563                         pci_unmap_single(priv->pci_dev,
4564                                          rxq->pool[i].dma_addr,
4565                                          priv->hw_setting.rx_buf_size,
4566                                          PCI_DMA_FROMDEVICE);
4567                         priv->alloc_rxb_skb--;
4568                         dev_kfree_skb(rxq->pool[i].skb);
4569                         rxq->pool[i].skb = NULL;
4570                 }
4571                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4572         }
4573
4574         /* Set us so that we have processed and used all buffers, but have
4575          * not restocked the Rx queue with fresh buffers */
4576         rxq->read = rxq->write = 0;
4577         rxq->free_count = 0;
4578         spin_unlock_irqrestore(&rxq->lock, flags);
4579 }
4580
4581 /* Convert linear signal-to-noise ratio into dB */
4582 static u8 ratio2dB[100] = {
4583 /*       0   1   2   3   4   5   6   7   8   9 */
4584          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4585         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4586         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4587         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4588         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4589         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4590         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4591         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4592         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4593         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4594 };
4595
4596 /* Calculates a relative dB value from a ratio of linear
4597  *   (i.e. not dB) signal levels.
4598  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4599 int iwl4965_calc_db_from_ratio(int sig_ratio)
4600 {
4601         /* 1000:1 or higher just report as 60 dB */
4602         if (sig_ratio >= 1000)
4603                 return 60;
4604
4605         /* 100:1 or higher, divide by 10 and use table,
4606          *   add 20 dB to make up for divide by 10 */
4607         if (sig_ratio >= 100)
4608                 return (20 + (int)ratio2dB[sig_ratio/10]);
4609
4610         /* We shouldn't see this */
4611         if (sig_ratio < 1)
4612                 return 0;
4613
4614         /* Use table for ratios 1:1 - 99:1 */
4615         return (int)ratio2dB[sig_ratio];
4616 }
4617
4618 #define PERFECT_RSSI (-20) /* dBm */
4619 #define WORST_RSSI (-95)   /* dBm */
4620 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4621
4622 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4623  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4624  *   about formulas used below. */
4625 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4626 {
4627         int sig_qual;
4628         int degradation = PERFECT_RSSI - rssi_dbm;
4629
4630         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4631          * as indicator; formula is (signal dbm - noise dbm).
4632          * SNR at or above 40 is a great signal (100%).
4633          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4634          * Weakest usable signal is usually 10 - 15 dB SNR. */
4635         if (noise_dbm) {
4636                 if (rssi_dbm - noise_dbm >= 40)
4637                         return 100;
4638                 else if (rssi_dbm < noise_dbm)
4639                         return 0;
4640                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4641
4642         /* Else use just the signal level.
4643          * This formula is a least squares fit of data points collected and
4644          *   compared with a reference system that had a percentage (%) display
4645          *   for signal quality. */
4646         } else
4647                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4648                             (15 * RSSI_RANGE + 62 * degradation)) /
4649                            (RSSI_RANGE * RSSI_RANGE);
4650
4651         if (sig_qual > 100)
4652                 sig_qual = 100;
4653         else if (sig_qual < 1)
4654                 sig_qual = 0;
4655
4656         return sig_qual;
4657 }
4658
4659 /**
4660  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4661  *
4662  * Uses the priv->rx_handlers callback function array to invoke
4663  * the appropriate handlers, including command responses,
4664  * frame-received notifications, and other notifications.
4665  */
4666 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4667 {
4668         struct iwl4965_rx_mem_buffer *rxb;
4669         struct iwl4965_rx_packet *pkt;
4670         struct iwl4965_rx_queue *rxq = &priv->rxq;
4671         u32 r, i;
4672         int reclaim;
4673         unsigned long flags;
4674         u8 fill_rx = 0;
4675         u32 count = 8;
4676
4677         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4678          * buffer that the driver may process (last buffer filled by ucode). */
4679         r = iwl4965_hw_get_rx_read(priv);
4680         i = rxq->read;
4681
4682         /* Rx interrupt, but nothing sent from uCode */
4683         if (i == r)
4684                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4685
4686         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4687                 fill_rx = 1;
4688
4689         while (i != r) {
4690                 rxb = rxq->queue[i];
4691
4692                 /* If an RXB doesn't have a Rx queue slot associated with it,
4693                  * then a bug has been introduced in the queue refilling
4694                  * routines -- catch it here */
4695                 BUG_ON(rxb == NULL);
4696
4697                 rxq->queue[i] = NULL;
4698
4699                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4700                                             priv->hw_setting.rx_buf_size,
4701                                             PCI_DMA_FROMDEVICE);
4702                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4703
4704                 /* Reclaim a command buffer only if this packet is a response
4705                  *   to a (driver-originated) command.
4706                  * If the packet (e.g. Rx frame) originated from uCode,
4707                  *   there is no command buffer to reclaim.
4708                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4709                  *   but apparently a few don't get set; catch them here. */
4710                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4711                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4712                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4713                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4714                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4715                         (pkt->hdr.cmd != REPLY_TX);
4716
4717                 /* Based on type of command response or notification,
4718                  *   handle those that need handling via function in
4719                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4720                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4721                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4722                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4723                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4724                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4725                 } else {
4726                         /* No handling needed */
4727                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4728                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4729                                 r, i, get_cmd_string(pkt->hdr.cmd),
4730                                 pkt->hdr.cmd);
4731                 }
4732
4733                 if (reclaim) {
4734                         /* Invoke any callbacks, transfer the skb to caller, and
4735                          * fire off the (possibly) blocking iwl4965_send_cmd()
4736                          * as we reclaim the driver command queue */
4737                         if (rxb && rxb->skb)
4738                                 iwl4965_tx_cmd_complete(priv, rxb);
4739                         else
4740                                 IWL_WARNING("Claim null rxb?\n");
4741                 }
4742
4743                 /* For now we just don't re-use anything.  We can tweak this
4744                  * later to try and re-use notification packets and SKBs that
4745                  * fail to Rx correctly */
4746                 if (rxb->skb != NULL) {
4747                         priv->alloc_rxb_skb--;
4748                         dev_kfree_skb_any(rxb->skb);
4749                         rxb->skb = NULL;
4750                 }
4751
4752                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4753                                  priv->hw_setting.rx_buf_size,
4754                                  PCI_DMA_FROMDEVICE);
4755                 spin_lock_irqsave(&rxq->lock, flags);
4756                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4757                 spin_unlock_irqrestore(&rxq->lock, flags);
4758                 i = (i + 1) & RX_QUEUE_MASK;
4759                 /* If there are a lot of unused frames,
4760                  * restock the Rx queue so ucode wont assert. */
4761                 if (fill_rx) {
4762                         count++;
4763                         if (count >= 8) {
4764                                 priv->rxq.read = i;
4765                                 __iwl4965_rx_replenish(priv);
4766                                 count = 0;
4767                         }
4768                 }
4769         }
4770
4771         /* Backtrack one entry */
4772         priv->rxq.read = i;
4773         iwl4965_rx_queue_restock(priv);
4774 }
4775
4776 /**
4777  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4778  */
4779 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4780                                   struct iwl4965_tx_queue *txq)
4781 {
4782         u32 reg = 0;
4783         int rc = 0;
4784         int txq_id = txq->q.id;
4785
4786         if (txq->need_update == 0)
4787                 return rc;
4788
4789         /* if we're trying to save power */
4790         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4791                 /* wake up nic if it's powered down ...
4792                  * uCode will wake up, and interrupt us again, so next
4793                  * time we'll skip this part. */
4794                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4795
4796                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4797                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4798                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4799                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4800                         return rc;
4801                 }
4802
4803                 /* restore this queue's parameters in nic hardware. */
4804                 rc = iwl4965_grab_nic_access(priv);
4805                 if (rc)
4806                         return rc;
4807                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4808                                      txq->q.write_ptr | (txq_id << 8));
4809                 iwl4965_release_nic_access(priv);
4810
4811         /* else not in power-save mode, uCode will never sleep when we're
4812          * trying to tx (during RFKILL, we're not trying to tx). */
4813         } else
4814                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4815                             txq->q.write_ptr | (txq_id << 8));
4816
4817         txq->need_update = 0;
4818
4819         return rc;
4820 }
4821
4822 #ifdef CONFIG_IWL4965_DEBUG
4823 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4824 {
4825         DECLARE_MAC_BUF(mac);
4826
4827         IWL_DEBUG_RADIO("RX CONFIG:\n");
4828         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4829         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4830         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4831         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4832                         le32_to_cpu(rxon->filter_flags));
4833         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4834         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4835                         rxon->ofdm_basic_rates);
4836         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4837         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4838                         print_mac(mac, rxon->node_addr));
4839         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4840                         print_mac(mac, rxon->bssid_addr));
4841         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4842 }
4843 #endif
4844
4845 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4846 {
4847         IWL_DEBUG_ISR("Enabling interrupts\n");
4848         set_bit(STATUS_INT_ENABLED, &priv->status);
4849         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4850 }
4851
4852 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4853 {
4854         clear_bit(STATUS_INT_ENABLED, &priv->status);
4855
4856         /* disable interrupts from uCode/NIC to host */
4857         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4858
4859         /* acknowledge/clear/reset any interrupts still pending
4860          * from uCode or flow handler (Rx/Tx DMA) */
4861         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4862         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4863         IWL_DEBUG_ISR("Disabled interrupts\n");
4864 }
4865
4866 static const char *desc_lookup(int i)
4867 {
4868         switch (i) {
4869         case 1:
4870                 return "FAIL";
4871         case 2:
4872                 return "BAD_PARAM";
4873         case 3:
4874                 return "BAD_CHECKSUM";
4875         case 4:
4876                 return "NMI_INTERRUPT";
4877         case 5:
4878                 return "SYSASSERT";
4879         case 6:
4880                 return "FATAL_ERROR";
4881         }
4882
4883         return "UNKNOWN";
4884 }
4885
4886 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4887 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4888
4889 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4890 {
4891         u32 data2, line;
4892         u32 desc, time, count, base, data1;
4893         u32 blink1, blink2, ilink1, ilink2;
4894         int rc;
4895
4896         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4897
4898         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4899                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4900                 return;
4901         }
4902
4903         rc = iwl4965_grab_nic_access(priv);
4904         if (rc) {
4905                 IWL_WARNING("Can not read from adapter at this time.\n");
4906                 return;
4907         }
4908
4909         count = iwl4965_read_targ_mem(priv, base);
4910
4911         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4912                 IWL_ERROR("Start IWL Error Log Dump:\n");
4913                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4914                           priv->status, priv->config, count);
4915         }
4916
4917         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4918         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4919         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4920         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4921         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4922         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4923         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4924         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4925         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4926
4927         IWL_ERROR("Desc               Time       "
4928                   "data1      data2      line\n");
4929         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4930                   desc_lookup(desc), desc, time, data1, data2, line);
4931         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4932         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4933                   ilink1, ilink2);
4934
4935         iwl4965_release_nic_access(priv);
4936 }
4937
4938 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4939
4940 /**
4941  * iwl4965_print_event_log - Dump error event log to syslog
4942  *
4943  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4944  */
4945 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4946                                 u32 num_events, u32 mode)
4947 {
4948         u32 i;
4949         u32 base;       /* SRAM byte address of event log header */
4950         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4951         u32 ptr;        /* SRAM byte address of log data */
4952         u32 ev, time, data; /* event log data */
4953
4954         if (num_events == 0)
4955                 return;
4956
4957         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4958
4959         if (mode == 0)
4960                 event_size = 2 * sizeof(u32);
4961         else
4962                 event_size = 3 * sizeof(u32);
4963
4964         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4965
4966         /* "time" is actually "data" for mode 0 (no timestamp).
4967          * place event id # at far right for easier visual parsing. */
4968         for (i = 0; i < num_events; i++) {
4969                 ev = iwl4965_read_targ_mem(priv, ptr);
4970                 ptr += sizeof(u32);
4971                 time = iwl4965_read_targ_mem(priv, ptr);
4972                 ptr += sizeof(u32);
4973                 if (mode == 0)
4974                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4975                 else {
4976                         data = iwl4965_read_targ_mem(priv, ptr);
4977                         ptr += sizeof(u32);
4978                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4979                 }
4980         }
4981 }
4982
4983 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4984 {
4985         int rc;
4986         u32 base;       /* SRAM byte address of event log header */
4987         u32 capacity;   /* event log capacity in # entries */
4988         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4989         u32 num_wraps;  /* # times uCode wrapped to top of log */
4990         u32 next_entry; /* index of next entry to be written by uCode */
4991         u32 size;       /* # entries that we'll print */
4992
4993         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4994         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4995                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4996                 return;
4997         }
4998
4999         rc = iwl4965_grab_nic_access(priv);
5000         if (rc) {
5001                 IWL_WARNING("Can not read from adapter at this time.\n");
5002                 return;
5003         }
5004
5005         /* event log header */
5006         capacity = iwl4965_read_targ_mem(priv, base);
5007         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
5008         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
5009         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
5010
5011         size = num_wraps ? capacity : next_entry;
5012
5013         /* bail out if nothing in log */
5014         if (size == 0) {
5015                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
5016                 iwl4965_release_nic_access(priv);
5017                 return;
5018         }
5019
5020         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
5021                   size, num_wraps);
5022
5023         /* if uCode has wrapped back to top of log, start at the oldest entry,
5024          * i.e the next one that uCode would fill. */
5025         if (num_wraps)
5026                 iwl4965_print_event_log(priv, next_entry,
5027                                     capacity - next_entry, mode);
5028
5029         /* (then/else) start at top of log */
5030         iwl4965_print_event_log(priv, 0, next_entry, mode);
5031
5032         iwl4965_release_nic_access(priv);
5033 }
5034
5035 /**
5036  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
5037  */
5038 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
5039 {
5040         /* Set the FW error flag -- cleared on iwl4965_down */
5041         set_bit(STATUS_FW_ERROR, &priv->status);
5042
5043         /* Cancel currently queued command. */
5044         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
5045
5046 #ifdef CONFIG_IWL4965_DEBUG
5047         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
5048                 iwl4965_dump_nic_error_log(priv);
5049                 iwl4965_dump_nic_event_log(priv);
5050                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
5051         }
5052 #endif
5053
5054         wake_up_interruptible(&priv->wait_command_queue);
5055
5056         /* Keep the restart process from trying to send host
5057          * commands by clearing the INIT status bit */
5058         clear_bit(STATUS_READY, &priv->status);
5059
5060         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5061                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
5062                           "Restarting adapter due to uCode error.\n");
5063
5064                 if (iwl4965_is_associated(priv)) {
5065                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
5066                                sizeof(priv->recovery_rxon));
5067                         priv->error_recovering = 1;
5068                 }
5069                 queue_work(priv->workqueue, &priv->restart);
5070         }
5071 }
5072
5073 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
5074 {
5075         unsigned long flags;
5076
5077         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
5078                sizeof(priv->staging_rxon));
5079         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5080         iwl4965_commit_rxon(priv);
5081
5082         iwl4965_rxon_add_station(priv, priv->bssid, 1);
5083
5084         spin_lock_irqsave(&priv->lock, flags);
5085         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
5086         priv->error_recovering = 0;
5087         spin_unlock_irqrestore(&priv->lock, flags);
5088 }
5089
5090 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
5091 {
5092         u32 inta, handled = 0;
5093         u32 inta_fh;
5094         unsigned long flags;
5095 #ifdef CONFIG_IWL4965_DEBUG
5096         u32 inta_mask;
5097 #endif
5098
5099         spin_lock_irqsave(&priv->lock, flags);
5100
5101         /* Ack/clear/reset pending uCode interrupts.
5102          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
5103          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
5104         inta = iwl4965_read32(priv, CSR_INT);
5105         iwl4965_write32(priv, CSR_INT, inta);
5106
5107         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
5108          * Any new interrupts that happen after this, either while we're
5109          * in this tasklet, or later, will show up in next ISR/tasklet. */
5110         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5111         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
5112
5113 #ifdef CONFIG_IWL4965_DEBUG
5114         if (iwl4965_debug_level & IWL_DL_ISR) {
5115                 /* just for debug */
5116                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5117                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5118                               inta, inta_mask, inta_fh);
5119         }
5120 #endif
5121
5122         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5123          * atomic, make sure that inta covers all the interrupts that
5124          * we've discovered, even if FH interrupt came in just after
5125          * reading CSR_INT. */
5126         if (inta_fh & CSR_FH_INT_RX_MASK)
5127                 inta |= CSR_INT_BIT_FH_RX;
5128         if (inta_fh & CSR_FH_INT_TX_MASK)
5129                 inta |= CSR_INT_BIT_FH_TX;
5130
5131         /* Now service all interrupt bits discovered above. */
5132         if (inta & CSR_INT_BIT_HW_ERR) {
5133                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5134
5135                 /* Tell the device to stop sending interrupts */
5136                 iwl4965_disable_interrupts(priv);
5137
5138                 iwl4965_irq_handle_error(priv);
5139
5140                 handled |= CSR_INT_BIT_HW_ERR;
5141
5142                 spin_unlock_irqrestore(&priv->lock, flags);
5143
5144                 return;
5145         }
5146
5147 #ifdef CONFIG_IWL4965_DEBUG
5148         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5149                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5150                 if (inta & CSR_INT_BIT_SCD)
5151                         IWL_DEBUG_ISR("Scheduler finished to transmit "
5152                                       "the frame/frames.\n");
5153
5154                 /* Alive notification via Rx interrupt will do the real work */
5155                 if (inta & CSR_INT_BIT_ALIVE)
5156                         IWL_DEBUG_ISR("Alive interrupt\n");
5157         }
5158 #endif
5159         /* Safely ignore these bits for debug checks below */
5160         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
5161
5162         /* HW RF KILL switch toggled */
5163         if (inta & CSR_INT_BIT_RF_KILL) {
5164                 int hw_rf_kill = 0;
5165                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
5166                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5167                         hw_rf_kill = 1;
5168
5169                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5170                                 "RF_KILL bit toggled to %s.\n",
5171                                 hw_rf_kill ? "disable radio":"enable radio");
5172
5173                 /* Queue restart only if RF_KILL switch was set to "kill"
5174                  *   when we loaded driver, and is now set to "enable".
5175                  * After we're Alive, RF_KILL gets handled by
5176                  *   iwl_rx_card_state_notif() */
5177                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5178                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
5179                         queue_work(priv->workqueue, &priv->restart);
5180                 }
5181
5182                 handled |= CSR_INT_BIT_RF_KILL;
5183         }
5184
5185         /* Chip got too hot and stopped itself */
5186         if (inta & CSR_INT_BIT_CT_KILL) {
5187                 IWL_ERROR("Microcode CT kill error detected.\n");
5188                 handled |= CSR_INT_BIT_CT_KILL;
5189         }
5190
5191         /* Error detected by uCode */
5192         if (inta & CSR_INT_BIT_SW_ERR) {
5193                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5194                           inta);
5195                 iwl4965_irq_handle_error(priv);
5196                 handled |= CSR_INT_BIT_SW_ERR;
5197         }
5198
5199         /* uCode wakes up after power-down sleep */
5200         if (inta & CSR_INT_BIT_WAKEUP) {
5201                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5202                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
5203                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5204                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5205                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5206                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5207                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5208                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5209
5210                 handled |= CSR_INT_BIT_WAKEUP;
5211         }
5212
5213         /* All uCode command responses, including Tx command responses,
5214          * Rx "responses" (frame-received notification), and other
5215          * notifications from uCode come through here*/
5216         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5217                 iwl4965_rx_handle(priv);
5218                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5219         }
5220
5221         if (inta & CSR_INT_BIT_FH_TX) {
5222                 IWL_DEBUG_ISR("Tx interrupt\n");
5223                 handled |= CSR_INT_BIT_FH_TX;
5224         }
5225
5226         if (inta & ~handled)
5227                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5228
5229         if (inta & ~CSR_INI_SET_MASK) {
5230                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5231                          inta & ~CSR_INI_SET_MASK);
5232                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5233         }
5234
5235         /* Re-enable all interrupts */
5236         iwl4965_enable_interrupts(priv);
5237
5238 #ifdef CONFIG_IWL4965_DEBUG
5239         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5240                 inta = iwl4965_read32(priv, CSR_INT);
5241                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5242                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5243                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5244                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5245         }
5246 #endif
5247         spin_unlock_irqrestore(&priv->lock, flags);
5248 }
5249
5250 static irqreturn_t iwl4965_isr(int irq, void *data)
5251 {
5252         struct iwl4965_priv *priv = data;
5253         u32 inta, inta_mask;
5254         u32 inta_fh;
5255         if (!priv)
5256                 return IRQ_NONE;
5257
5258         spin_lock(&priv->lock);
5259
5260         /* Disable (but don't clear!) interrupts here to avoid
5261          *    back-to-back ISRs and sporadic interrupts from our NIC.
5262          * If we have something to service, the tasklet will re-enable ints.
5263          * If we *don't* have something, we'll re-enable before leaving here. */
5264         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
5265         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
5266
5267         /* Discover which interrupts are active/pending */
5268         inta = iwl4965_read32(priv, CSR_INT);
5269         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5270
5271         /* Ignore interrupt if there's nothing in NIC to service.
5272          * This may be due to IRQ shared with another device,
5273          * or due to sporadic interrupts thrown from our NIC. */
5274         if (!inta && !inta_fh) {
5275                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5276                 goto none;
5277         }
5278
5279         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5280                 /* Hardware disappeared. It might have already raised
5281                  * an interrupt */
5282                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5283                 goto unplugged;
5284         }
5285
5286         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5287                       inta, inta_mask, inta_fh);
5288
5289         inta &= ~CSR_INT_BIT_SCD;
5290
5291         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
5292         if (likely(inta || inta_fh))
5293                 tasklet_schedule(&priv->irq_tasklet);
5294
5295  unplugged:
5296         spin_unlock(&priv->lock);
5297         return IRQ_HANDLED;
5298
5299  none:
5300         /* re-enable interrupts here since we don't have anything to service. */
5301         iwl4965_enable_interrupts(priv);
5302         spin_unlock(&priv->lock);
5303         return IRQ_NONE;
5304 }
5305
5306 /************************** EEPROM BANDS ****************************
5307  *
5308  * The iwl4965_eeprom_band definitions below provide the mapping from the
5309  * EEPROM contents to the specific channel number supported for each
5310  * band.
5311  *
5312  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5313  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5314  * The specific geography and calibration information for that channel
5315  * is contained in the eeprom map itself.
5316  *
5317  * During init, we copy the eeprom information and channel map
5318  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5319  *
5320  * channel_map_24/52 provides the index in the channel_info array for a
5321  * given channel.  We have to have two separate maps as there is channel
5322  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5323  * band_2
5324  *
5325  * A value of 0xff stored in the channel_map indicates that the channel
5326  * is not supported by the hardware at all.
5327  *
5328  * A value of 0xfe in the channel_map indicates that the channel is not
5329  * valid for Tx with the current hardware.  This means that
5330  * while the system can tune and receive on a given channel, it may not
5331  * be able to associate or transmit any frames on that
5332  * channel.  There is no corresponding channel information for that
5333  * entry.
5334  *
5335  *********************************************************************/
5336
5337 /* 2.4 GHz */
5338 static const u8 iwl4965_eeprom_band_1[14] = {
5339         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5340 };
5341
5342 /* 5.2 GHz bands */
5343 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5344         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5345 };
5346
5347 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5348         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5349 };
5350
5351 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5352         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5353 };
5354
5355 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5356         145, 149, 153, 157, 161, 165
5357 };
5358
5359 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5360         1, 2, 3, 4, 5, 6, 7
5361 };
5362
5363 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5364         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5365 };
5366
5367 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5368                                     int band,
5369                                     int *eeprom_ch_count,
5370                                     const struct iwl4965_eeprom_channel
5371                                     **eeprom_ch_info,
5372                                     const u8 **eeprom_ch_index)
5373 {
5374         switch (band) {
5375         case 1:         /* 2.4GHz band */
5376                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5377                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5378                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5379                 break;
5380         case 2:         /* 4.9GHz band */
5381                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5382                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5383                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5384                 break;
5385         case 3:         /* 5.2GHz band */
5386                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5387                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5388                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5389                 break;
5390         case 4:         /* 5.5GHz band */
5391                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5392                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5393                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5394                 break;
5395         case 5:         /* 5.7GHz band */
5396                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5397                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5398                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5399                 break;
5400         case 6:         /* 2.4GHz FAT channels */
5401                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5402                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5403                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5404                 break;
5405         case 7:         /* 5 GHz FAT channels */
5406                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5407                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5408                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5409                 break;
5410         default:
5411                 BUG();
5412                 return;
5413         }
5414 }
5415
5416 /**
5417  * iwl4965_get_channel_info - Find driver's private channel info
5418  *
5419  * Based on band and channel number.
5420  */
5421 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5422                                                     int phymode, u16 channel)
5423 {
5424         int i;
5425
5426         switch (phymode) {
5427         case MODE_IEEE80211A:
5428                 for (i = 14; i < priv->channel_count; i++) {
5429                         if (priv->channel_info[i].channel == channel)
5430                                 return &priv->channel_info[i];
5431                 }
5432                 break;
5433
5434         case MODE_IEEE80211B:
5435         case MODE_IEEE80211G:
5436                 if (channel >= 1 && channel <= 14)
5437                         return &priv->channel_info[channel - 1];
5438                 break;
5439
5440         }
5441
5442         return NULL;
5443 }
5444
5445 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5446                             ? # x " " : "")
5447
5448 /**
5449  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5450  */
5451 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5452 {
5453         int eeprom_ch_count = 0;
5454         const u8 *eeprom_ch_index = NULL;
5455         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5456         int band, ch;
5457         struct iwl4965_channel_info *ch_info;
5458
5459         if (priv->channel_count) {
5460                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5461                 return 0;
5462         }
5463
5464         if (priv->eeprom.version < 0x2f) {
5465                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5466                             priv->eeprom.version);
5467                 return -EINVAL;
5468         }
5469
5470         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5471
5472         priv->channel_count =
5473             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5474             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5475             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5476             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5477             ARRAY_SIZE(iwl4965_eeprom_band_5);
5478
5479         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5480
5481         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5482                                      priv->channel_count, GFP_KERNEL);
5483         if (!priv->channel_info) {
5484                 IWL_ERROR("Could not allocate channel_info\n");
5485                 priv->channel_count = 0;
5486                 return -ENOMEM;
5487         }
5488
5489         ch_info = priv->channel_info;
5490
5491         /* Loop through the 5 EEPROM bands adding them in order to the
5492          * channel map we maintain (that contains additional information than
5493          * what just in the EEPROM) */
5494         for (band = 1; band <= 5; band++) {
5495
5496                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5497                                         &eeprom_ch_info, &eeprom_ch_index);
5498
5499                 /* Loop through each band adding each of the channels */
5500                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5501                         ch_info->channel = eeprom_ch_index[ch];
5502                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5503                             MODE_IEEE80211A;
5504
5505                         /* permanently store EEPROM's channel regulatory flags
5506                          *   and max power in channel info database. */
5507                         ch_info->eeprom = eeprom_ch_info[ch];
5508
5509                         /* Copy the run-time flags so they are there even on
5510                          * invalid channels */
5511                         ch_info->flags = eeprom_ch_info[ch].flags;
5512
5513                         if (!(is_channel_valid(ch_info))) {
5514                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5515                                                "No traffic\n",
5516                                                ch_info->channel,
5517                                                ch_info->flags,
5518                                                is_channel_a_band(ch_info) ?
5519                                                "5.2" : "2.4");
5520                                 ch_info++;
5521                                 continue;
5522                         }
5523
5524                         /* Initialize regulatory-based run-time data */
5525                         ch_info->max_power_avg = ch_info->curr_txpow =
5526                             eeprom_ch_info[ch].max_power_avg;
5527                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5528                         ch_info->min_power = 0;
5529
5530                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5531                                        " %ddBm): Ad-Hoc %ssupported\n",
5532                                        ch_info->channel,
5533                                        is_channel_a_band(ch_info) ?
5534                                        "5.2" : "2.4",
5535                                        CHECK_AND_PRINT(IBSS),
5536                                        CHECK_AND_PRINT(ACTIVE),
5537                                        CHECK_AND_PRINT(RADAR),
5538                                        CHECK_AND_PRINT(WIDE),
5539                                        CHECK_AND_PRINT(NARROW),
5540                                        CHECK_AND_PRINT(DFS),
5541                                        eeprom_ch_info[ch].flags,
5542                                        eeprom_ch_info[ch].max_power_avg,
5543                                        ((eeprom_ch_info[ch].
5544                                          flags & EEPROM_CHANNEL_IBSS)
5545                                         && !(eeprom_ch_info[ch].
5546                                              flags & EEPROM_CHANNEL_RADAR))
5547                                        ? "" : "not ");
5548
5549                         /* Set the user_txpower_limit to the highest power
5550                          * supported by any channel */
5551                         if (eeprom_ch_info[ch].max_power_avg >
5552                             priv->user_txpower_limit)
5553                                 priv->user_txpower_limit =
5554                                     eeprom_ch_info[ch].max_power_avg;
5555
5556                         ch_info++;
5557                 }
5558         }
5559
5560         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5561         for (band = 6; band <= 7; band++) {
5562                 int phymode;
5563                 u8 fat_extension_chan;
5564
5565                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5566                                         &eeprom_ch_info, &eeprom_ch_index);
5567
5568                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5569                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5570
5571                 /* Loop through each band adding each of the channels */
5572                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5573
5574                         if ((band == 6) &&
5575                             ((eeprom_ch_index[ch] == 5) ||
5576                             (eeprom_ch_index[ch] == 6) ||
5577                             (eeprom_ch_index[ch] == 7)))
5578                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5579                         else
5580                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5581
5582                         /* Set up driver's info for lower half */
5583                         iwl4965_set_fat_chan_info(priv, phymode,
5584                                                   eeprom_ch_index[ch],
5585                                                   &(eeprom_ch_info[ch]),
5586                                                   fat_extension_chan);
5587
5588                         /* Set up driver's info for upper half */
5589                         iwl4965_set_fat_chan_info(priv, phymode,
5590                                                   (eeprom_ch_index[ch] + 4),
5591                                                   &(eeprom_ch_info[ch]),
5592                                                   HT_IE_EXT_CHANNEL_BELOW);
5593                 }
5594         }
5595
5596         return 0;
5597 }
5598
5599 /*
5600  * iwl4965_free_channel_map - undo allocations in iwl4965_init_channel_map
5601  */
5602 static void iwl4965_free_channel_map(struct iwl4965_priv *priv)
5603 {
5604         kfree(priv->channel_info);
5605         priv->channel_count = 0;
5606 }
5607
5608 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5609  * sending probe req.  This should be set long enough to hear probe responses
5610  * from more than one AP.  */
5611 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5612 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5613
5614 /* For faster active scanning, scan will move to the next channel if fewer than
5615  * PLCP_QUIET_THRESH packets are heard on this channel within
5616  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5617  * time if it's a quiet channel (nothing responded to our probe, and there's
5618  * no other traffic).
5619  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5620 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5621 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5622
5623 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5624  * Must be set longer than active dwell time.
5625  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5626 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5627 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5628 #define IWL_PASSIVE_DWELL_BASE      (100)
5629 #define IWL_CHANNEL_TUNE_TIME       5
5630
5631 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv, int phymode)
5632 {
5633         if (phymode == MODE_IEEE80211A)
5634                 return IWL_ACTIVE_DWELL_TIME_52;
5635         else
5636                 return IWL_ACTIVE_DWELL_TIME_24;
5637 }
5638
5639 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv, int phymode)
5640 {
5641         u16 active = iwl4965_get_active_dwell_time(priv, phymode);
5642         u16 passive = (phymode != MODE_IEEE80211A) ?
5643             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5644             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5645
5646         if (iwl4965_is_associated(priv)) {
5647                 /* If we're associated, we clamp the maximum passive
5648                  * dwell time to be 98% of the beacon interval (minus
5649                  * 2 * channel tune time) */
5650                 passive = priv->beacon_int;
5651                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5652                         passive = IWL_PASSIVE_DWELL_BASE;
5653                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5654         }
5655
5656         if (passive <= active)
5657                 passive = active + 1;
5658
5659         return passive;
5660 }
5661
5662 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
5663                                      u8 is_active, u8 direct_mask,
5664                                      struct iwl4965_scan_channel *scan_ch)
5665 {
5666         const struct ieee80211_channel *channels = NULL;
5667         const struct ieee80211_hw_mode *hw_mode;
5668         const struct iwl4965_channel_info *ch_info;
5669         u16 passive_dwell = 0;
5670         u16 active_dwell = 0;
5671         int added, i;
5672
5673         hw_mode = iwl4965_get_hw_mode(priv, phymode);
5674         if (!hw_mode)
5675                 return 0;
5676
5677         channels = hw_mode->channels;
5678
5679         active_dwell = iwl4965_get_active_dwell_time(priv, phymode);
5680         passive_dwell = iwl4965_get_passive_dwell_time(priv, phymode);
5681
5682         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5683                 if (channels[i].chan ==
5684                     le16_to_cpu(priv->active_rxon.channel)) {
5685                         if (iwl4965_is_associated(priv)) {
5686                                 IWL_DEBUG_SCAN
5687                                     ("Skipping current channel %d\n",
5688                                      le16_to_cpu(priv->active_rxon.channel));
5689                                 continue;
5690                         }
5691                 } else if (priv->only_active_channel)
5692                         continue;
5693
5694                 scan_ch->channel = channels[i].chan;
5695
5696                 ch_info = iwl4965_get_channel_info(priv, phymode,
5697                                          scan_ch->channel);
5698                 if (!is_channel_valid(ch_info)) {
5699                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5700                                        scan_ch->channel);
5701                         continue;
5702                 }
5703
5704                 if (!is_active || is_channel_passive(ch_info) ||
5705                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5706                         scan_ch->type = 0;      /* passive */
5707                 else
5708                         scan_ch->type = 1;      /* active */
5709
5710                 if (scan_ch->type & 1)
5711                         scan_ch->type |= (direct_mask << 1);
5712
5713                 if (is_channel_narrow(ch_info))
5714                         scan_ch->type |= (1 << 7);
5715
5716                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5717                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5718
5719                 /* Set txpower levels to defaults */
5720                 scan_ch->tpc.dsp_atten = 110;
5721                 /* scan_pwr_info->tpc.dsp_atten; */
5722
5723                 /*scan_pwr_info->tpc.tx_gain; */
5724                 if (phymode == MODE_IEEE80211A)
5725                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5726                 else {
5727                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5728                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5729                          * power level:
5730                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5731                          */
5732                 }
5733
5734                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5735                                scan_ch->channel,
5736                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5737                                (scan_ch->type & 1) ?
5738                                active_dwell : passive_dwell);
5739
5740                 scan_ch++;
5741                 added++;
5742         }
5743
5744         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5745         return added;
5746 }
5747
5748 static void iwl4965_reset_channel_flag(struct iwl4965_priv *priv)
5749 {
5750         int i, j;
5751         for (i = 0; i < 3; i++) {
5752                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5753                 for (j = 0; j < hw_mode->num_channels; j++)
5754                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5755         }
5756 }
5757
5758 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5759                               struct ieee80211_rate *rates)
5760 {
5761         int i;
5762
5763         for (i = 0; i < IWL_RATE_COUNT; i++) {
5764                 rates[i].rate = iwl4965_rates[i].ieee * 5;
5765                 rates[i].val = i; /* Rate scaling will work on indexes */
5766                 rates[i].val2 = i;
5767                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5768                 /* Only OFDM have the bits-per-symbol set */
5769                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5770                         rates[i].flags |= IEEE80211_RATE_OFDM;
5771                 else {
5772                         /*
5773                          * If CCK 1M then set rate flag to CCK else CCK_2
5774                          * which is CCK | PREAMBLE2
5775                          */
5776                         rates[i].flags |= (iwl4965_rates[i].plcp == 10) ?
5777                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5778                 }
5779
5780                 /* Set up which ones are basic rates... */
5781                 if (IWL_BASIC_RATES_MASK & (1 << i))
5782                         rates[i].flags |= IEEE80211_RATE_BASIC;
5783         }
5784 }
5785
5786 /**
5787  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5788  */
5789 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5790 {
5791         struct iwl4965_channel_info *ch;
5792         struct ieee80211_hw_mode *modes;
5793         struct ieee80211_channel *channels;
5794         struct ieee80211_channel *geo_ch;
5795         struct ieee80211_rate *rates;
5796         int i = 0;
5797         enum {
5798                 A = 0,
5799                 B = 1,
5800                 G = 2,
5801         };
5802         int mode_count = 3;
5803
5804         if (priv->modes) {
5805                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5806                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5807                 return 0;
5808         }
5809
5810         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5811                         GFP_KERNEL);
5812         if (!modes)
5813                 return -ENOMEM;
5814
5815         channels = kzalloc(sizeof(struct ieee80211_channel) *
5816                            priv->channel_count, GFP_KERNEL);
5817         if (!channels) {
5818                 kfree(modes);
5819                 return -ENOMEM;
5820         }
5821
5822         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5823                         GFP_KERNEL);
5824         if (!rates) {
5825                 kfree(modes);
5826                 kfree(channels);
5827                 return -ENOMEM;
5828         }
5829
5830         /* 0 = 802.11a
5831          * 1 = 802.11b
5832          * 2 = 802.11g
5833          */
5834
5835         /* 5.2GHz channels start after the 2.4GHz channels */
5836         modes[A].mode = MODE_IEEE80211A;
5837         modes[A].channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5838         modes[A].rates = rates;
5839         modes[A].num_rates = 8; /* just OFDM */
5840         modes[A].rates = &rates[4];
5841         modes[A].num_channels = 0;
5842 #ifdef CONFIG_IWL4965_HT
5843         iwl4965_init_ht_hw_capab(&modes[A].ht_info, MODE_IEEE80211A);
5844 #endif
5845
5846         modes[B].mode = MODE_IEEE80211B;
5847         modes[B].channels = channels;
5848         modes[B].rates = rates;
5849         modes[B].num_rates = 4; /* just CCK */
5850         modes[B].num_channels = 0;
5851
5852         modes[G].mode = MODE_IEEE80211G;
5853         modes[G].channels = channels;
5854         modes[G].rates = rates;
5855         modes[G].num_rates = 12;        /* OFDM & CCK */
5856         modes[G].num_channels = 0;
5857 #ifdef CONFIG_IWL4965_HT
5858         iwl4965_init_ht_hw_capab(&modes[G].ht_info, MODE_IEEE80211G);
5859 #endif
5860
5861         priv->ieee_channels = channels;
5862         priv->ieee_rates = rates;
5863
5864         iwl4965_init_hw_rates(priv, rates);
5865
5866         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5867                 ch = &priv->channel_info[i];
5868
5869                 if (!is_channel_valid(ch)) {
5870                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5871                                     "skipping.\n",
5872                                     ch->channel, is_channel_a_band(ch) ?
5873                                     "5.2" : "2.4");
5874                         continue;
5875                 }
5876
5877                 if (is_channel_a_band(ch)) {
5878                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5879                 } else {
5880                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5881                         modes[G].num_channels++;
5882                 }
5883
5884                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5885                 geo_ch->chan = ch->channel;
5886                 geo_ch->power_level = ch->max_power_avg;
5887                 geo_ch->antenna_max = 0xff;
5888
5889                 if (is_channel_valid(ch)) {
5890                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5891                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5892                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5893
5894                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5895                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5896
5897                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5898                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5899
5900                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5901                                 priv->max_channel_txpower_limit =
5902                                     ch->max_power_avg;
5903                 }
5904
5905                 geo_ch->val = geo_ch->flag;
5906         }
5907
5908         if ((modes[A].num_channels == 0) && priv->is_abg) {
5909                 printk(KERN_INFO DRV_NAME
5910                        ": Incorrectly detected BG card as ABG.  Please send "
5911                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5912                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5913                 priv->is_abg = 0;
5914         }
5915
5916         printk(KERN_INFO DRV_NAME
5917                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5918                modes[G].num_channels, modes[A].num_channels);
5919
5920         /*
5921          * NOTE:  We register these in preference of order -- the
5922          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5923          * a phymode based on rates or AP capabilities but seems to
5924          * configure it purely on if the channel being configured
5925          * is supported by a mode -- and the first match is taken
5926          */
5927
5928         if (modes[G].num_channels)
5929                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5930         if (modes[B].num_channels)
5931                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5932         if (modes[A].num_channels)
5933                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5934
5935         priv->modes = modes;
5936         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5937
5938         return 0;
5939 }
5940
5941 /*
5942  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5943  */
5944 static void iwl4965_free_geos(struct iwl4965_priv *priv)
5945 {
5946         kfree(priv->modes);
5947         kfree(priv->ieee_channels);
5948         kfree(priv->ieee_rates);
5949         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5950 }
5951
5952 /******************************************************************************
5953  *
5954  * uCode download functions
5955  *
5956  ******************************************************************************/
5957
5958 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5959 {
5960         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5961         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5962         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5963         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5964         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5965         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5966 }
5967
5968 /**
5969  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5970  *     looking at all data.
5971  */
5972 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5973                                  u32 len)
5974 {
5975         u32 val;
5976         u32 save_len = len;
5977         int rc = 0;
5978         u32 errcnt;
5979
5980         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5981
5982         rc = iwl4965_grab_nic_access(priv);
5983         if (rc)
5984                 return rc;
5985
5986         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5987
5988         errcnt = 0;
5989         for (; len > 0; len -= sizeof(u32), image++) {
5990                 /* read data comes through single port, auto-incr addr */
5991                 /* NOTE: Use the debugless read so we don't flood kernel log
5992                  * if IWL_DL_IO is set */
5993                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5994                 if (val != le32_to_cpu(*image)) {
5995                         IWL_ERROR("uCode INST section is invalid at "
5996                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5997                                   save_len - len, val, le32_to_cpu(*image));
5998                         rc = -EIO;
5999                         errcnt++;
6000                         if (errcnt >= 20)
6001                                 break;
6002                 }
6003         }
6004
6005         iwl4965_release_nic_access(priv);
6006
6007         if (!errcnt)
6008                 IWL_DEBUG_INFO
6009                     ("ucode image in INSTRUCTION memory is good\n");
6010
6011         return rc;
6012 }
6013
6014
6015 /**
6016  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
6017  *   using sample data 100 bytes apart.  If these sample points are good,
6018  *   it's a pretty good bet that everything between them is good, too.
6019  */
6020 static int iwl4965_verify_inst_sparse(struct iwl4965_priv *priv, __le32 *image, u32 len)
6021 {
6022         u32 val;
6023         int rc = 0;
6024         u32 errcnt = 0;
6025         u32 i;
6026
6027         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
6028
6029         rc = iwl4965_grab_nic_access(priv);
6030         if (rc)
6031                 return rc;
6032
6033         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
6034                 /* read data comes through single port, auto-incr addr */
6035                 /* NOTE: Use the debugless read so we don't flood kernel log
6036                  * if IWL_DL_IO is set */
6037                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
6038                         i + RTC_INST_LOWER_BOUND);
6039                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
6040                 if (val != le32_to_cpu(*image)) {
6041 #if 0 /* Enable this if you want to see details */
6042                         IWL_ERROR("uCode INST section is invalid at "
6043                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
6044                                   i, val, *image);
6045 #endif
6046                         rc = -EIO;
6047                         errcnt++;
6048                         if (errcnt >= 3)
6049                                 break;
6050                 }
6051         }
6052
6053         iwl4965_release_nic_access(priv);
6054
6055         return rc;
6056 }
6057
6058
6059 /**
6060  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
6061  *    and verify its contents
6062  */
6063 static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
6064 {
6065         __le32 *image;
6066         u32 len;
6067         int rc = 0;
6068
6069         /* Try bootstrap */
6070         image = (__le32 *)priv->ucode_boot.v_addr;
6071         len = priv->ucode_boot.len;
6072         rc = iwl4965_verify_inst_sparse(priv, image, len);
6073         if (rc == 0) {
6074                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
6075                 return 0;
6076         }
6077
6078         /* Try initialize */
6079         image = (__le32 *)priv->ucode_init.v_addr;
6080         len = priv->ucode_init.len;
6081         rc = iwl4965_verify_inst_sparse(priv, image, len);
6082         if (rc == 0) {
6083                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
6084                 return 0;
6085         }
6086
6087         /* Try runtime/protocol */
6088         image = (__le32 *)priv->ucode_code.v_addr;
6089         len = priv->ucode_code.len;
6090         rc = iwl4965_verify_inst_sparse(priv, image, len);
6091         if (rc == 0) {
6092                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
6093                 return 0;
6094         }
6095
6096         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
6097
6098         /* Since nothing seems to match, show first several data entries in
6099          * instruction SRAM, so maybe visual inspection will give a clue.
6100          * Selection of bootstrap image (vs. other images) is arbitrary. */
6101         image = (__le32 *)priv->ucode_boot.v_addr;
6102         len = priv->ucode_boot.len;
6103         rc = iwl4965_verify_inst_full(priv, image, len);
6104
6105         return rc;
6106 }
6107
6108
6109 /* check contents of special bootstrap uCode SRAM */
6110 static int iwl4965_verify_bsm(struct iwl4965_priv *priv)
6111 {
6112         __le32 *image = priv->ucode_boot.v_addr;
6113         u32 len = priv->ucode_boot.len;
6114         u32 reg;
6115         u32 val;
6116
6117         IWL_DEBUG_INFO("Begin verify bsm\n");
6118
6119         /* verify BSM SRAM contents */
6120         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
6121         for (reg = BSM_SRAM_LOWER_BOUND;
6122              reg < BSM_SRAM_LOWER_BOUND + len;
6123              reg += sizeof(u32), image ++) {
6124                 val = iwl4965_read_prph(priv, reg);
6125                 if (val != le32_to_cpu(*image)) {
6126                         IWL_ERROR("BSM uCode verification failed at "
6127                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6128                                   BSM_SRAM_LOWER_BOUND,
6129                                   reg - BSM_SRAM_LOWER_BOUND, len,
6130                                   val, le32_to_cpu(*image));
6131                         return -EIO;
6132                 }
6133         }
6134
6135         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6136
6137         return 0;
6138 }
6139
6140 /**
6141  * iwl4965_load_bsm - Load bootstrap instructions
6142  *
6143  * BSM operation:
6144  *
6145  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6146  * in special SRAM that does not power down during RFKILL.  When powering back
6147  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6148  * the bootstrap program into the on-board processor, and starts it.
6149  *
6150  * The bootstrap program loads (via DMA) instructions and data for a new
6151  * program from host DRAM locations indicated by the host driver in the
6152  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6153  * automatically.
6154  *
6155  * When initializing the NIC, the host driver points the BSM to the
6156  * "initialize" uCode image.  This uCode sets up some internal data, then
6157  * notifies host via "initialize alive" that it is complete.
6158  *
6159  * The host then replaces the BSM_DRAM_* pointer values to point to the
6160  * normal runtime uCode instructions and a backup uCode data cache buffer
6161  * (filled initially with starting data values for the on-board processor),
6162  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6163  * which begins normal operation.
6164  *
6165  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6166  * the backup data cache in DRAM before SRAM is powered down.
6167  *
6168  * When powering back up, the BSM loads the bootstrap program.  This reloads
6169  * the runtime uCode instructions and the backup data cache into SRAM,
6170  * and re-launches the runtime uCode from where it left off.
6171  */
6172 static int iwl4965_load_bsm(struct iwl4965_priv *priv)
6173 {
6174         __le32 *image = priv->ucode_boot.v_addr;
6175         u32 len = priv->ucode_boot.len;
6176         dma_addr_t pinst;
6177         dma_addr_t pdata;
6178         u32 inst_len;
6179         u32 data_len;
6180         int rc;
6181         int i;
6182         u32 done;
6183         u32 reg_offset;
6184
6185         IWL_DEBUG_INFO("Begin load bsm\n");
6186
6187         /* make sure bootstrap program is no larger than BSM's SRAM size */
6188         if (len > IWL_MAX_BSM_SIZE)
6189                 return -EINVAL;
6190
6191         /* Tell bootstrap uCode where to find the "Initialize" uCode
6192          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
6193          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
6194          *        after the "initialize" uCode has run, to point to
6195          *        runtime/protocol instructions and backup data cache. */
6196         pinst = priv->ucode_init.p_addr >> 4;
6197         pdata = priv->ucode_init_data.p_addr >> 4;
6198         inst_len = priv->ucode_init.len;
6199         data_len = priv->ucode_init_data.len;
6200
6201         rc = iwl4965_grab_nic_access(priv);
6202         if (rc)
6203                 return rc;
6204
6205         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6206         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6207         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6208         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6209
6210         /* Fill BSM memory with bootstrap instructions */
6211         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6212              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6213              reg_offset += sizeof(u32), image++)
6214                 _iwl4965_write_prph(priv, reg_offset,
6215                                           le32_to_cpu(*image));
6216
6217         rc = iwl4965_verify_bsm(priv);
6218         if (rc) {
6219                 iwl4965_release_nic_access(priv);
6220                 return rc;
6221         }
6222
6223         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6224         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
6225         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
6226                                  RTC_INST_LOWER_BOUND);
6227         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6228
6229         /* Load bootstrap code into instruction SRAM now,
6230          *   to prepare to load "initialize" uCode */
6231         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6232                 BSM_WR_CTRL_REG_BIT_START);
6233
6234         /* Wait for load of bootstrap uCode to finish */
6235         for (i = 0; i < 100; i++) {
6236                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
6237                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6238                         break;
6239                 udelay(10);
6240         }
6241         if (i < 100)
6242                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6243         else {
6244                 IWL_ERROR("BSM write did not complete!\n");
6245                 return -EIO;
6246         }
6247
6248         /* Enable future boot loads whenever power management unit triggers it
6249          *   (e.g. when powering back up after power-save shutdown) */
6250         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6251                 BSM_WR_CTRL_REG_BIT_START_EN);
6252
6253         iwl4965_release_nic_access(priv);
6254
6255         return 0;
6256 }
6257
6258 static void iwl4965_nic_start(struct iwl4965_priv *priv)
6259 {
6260         /* Remove all resets to allow NIC to operate */
6261         iwl4965_write32(priv, CSR_RESET, 0);
6262 }
6263
6264
6265 /**
6266  * iwl4965_read_ucode - Read uCode images from disk file.
6267  *
6268  * Copy into buffers for card to fetch via bus-mastering
6269  */
6270 static int iwl4965_read_ucode(struct iwl4965_priv *priv)
6271 {
6272         struct iwl4965_ucode *ucode;
6273         int ret;
6274         const struct firmware *ucode_raw;
6275         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6276         u8 *src;
6277         size_t len;
6278         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6279
6280         /* Ask kernel firmware_class module to get the boot firmware off disk.
6281          * request_firmware() is synchronous, file is in memory on return. */
6282         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6283         if (ret < 0) {
6284                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
6285                                         name, ret);
6286                 goto error;
6287         }
6288
6289         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6290                        name, ucode_raw->size);
6291
6292         /* Make sure that we got at least our header! */
6293         if (ucode_raw->size < sizeof(*ucode)) {
6294                 IWL_ERROR("File size way too small!\n");
6295                 ret = -EINVAL;
6296                 goto err_release;
6297         }
6298
6299         /* Data from ucode file:  header followed by uCode images */
6300         ucode = (void *)ucode_raw->data;
6301
6302         ver = le32_to_cpu(ucode->ver);
6303         inst_size = le32_to_cpu(ucode->inst_size);
6304         data_size = le32_to_cpu(ucode->data_size);
6305         init_size = le32_to_cpu(ucode->init_size);
6306         init_data_size = le32_to_cpu(ucode->init_data_size);
6307         boot_size = le32_to_cpu(ucode->boot_size);
6308
6309         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6310         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6311                        inst_size);
6312         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6313                        data_size);
6314         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6315                        init_size);
6316         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6317                        init_data_size);
6318         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6319                        boot_size);
6320
6321         /* Verify size of file vs. image size info in file's header */
6322         if (ucode_raw->size < sizeof(*ucode) +
6323                 inst_size + data_size + init_size +
6324                 init_data_size + boot_size) {
6325
6326                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6327                                (int)ucode_raw->size);
6328                 ret = -EINVAL;
6329                 goto err_release;
6330         }
6331
6332         /* Verify that uCode images will fit in card's SRAM */
6333         if (inst_size > IWL_MAX_INST_SIZE) {
6334                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
6335                                inst_size);
6336                 ret = -EINVAL;
6337                 goto err_release;
6338         }
6339
6340         if (data_size > IWL_MAX_DATA_SIZE) {
6341                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
6342                                 data_size);
6343                 ret = -EINVAL;
6344                 goto err_release;
6345         }
6346         if (init_size > IWL_MAX_INST_SIZE) {
6347                 IWL_DEBUG_INFO
6348                     ("uCode init instr len %d too large to fit in\n",
6349                       init_size);
6350                 ret = -EINVAL;
6351                 goto err_release;
6352         }
6353         if (init_data_size > IWL_MAX_DATA_SIZE) {
6354                 IWL_DEBUG_INFO
6355                     ("uCode init data len %d too large to fit in\n",
6356                       init_data_size);
6357                 ret = -EINVAL;
6358                 goto err_release;
6359         }
6360         if (boot_size > IWL_MAX_BSM_SIZE) {
6361                 IWL_DEBUG_INFO
6362                     ("uCode boot instr len %d too large to fit in\n",
6363                       boot_size);
6364                 ret = -EINVAL;
6365                 goto err_release;
6366         }
6367
6368         /* Allocate ucode buffers for card's bus-master loading ... */
6369
6370         /* Runtime instructions and 2 copies of data:
6371          * 1) unmodified from disk
6372          * 2) backup cache for save/restore during power-downs */
6373         priv->ucode_code.len = inst_size;
6374         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
6375
6376         priv->ucode_data.len = data_size;
6377         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
6378
6379         priv->ucode_data_backup.len = data_size;
6380         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
6381
6382         /* Initialization instructions and data */
6383         if (init_size && init_data_size) {
6384                 priv->ucode_init.len = init_size;
6385                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
6386
6387                 priv->ucode_init_data.len = init_data_size;
6388                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
6389
6390                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6391                         goto err_pci_alloc;
6392         }
6393
6394         /* Bootstrap (instructions only, no data) */
6395         if (boot_size) {
6396                 priv->ucode_boot.len = boot_size;
6397                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6398
6399                 if (!priv->ucode_boot.v_addr)
6400                         goto err_pci_alloc;
6401         }
6402
6403         /* Copy images into buffers for card's bus-master reads ... */
6404
6405         /* Runtime instructions (first block of data in file) */
6406         src = &ucode->data[0];
6407         len = priv->ucode_code.len;
6408         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6409         memcpy(priv->ucode_code.v_addr, src, len);
6410         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6411                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6412
6413         /* Runtime data (2nd block)
6414          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
6415         src = &ucode->data[inst_size];
6416         len = priv->ucode_data.len;
6417         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6418         memcpy(priv->ucode_data.v_addr, src, len);
6419         memcpy(priv->ucode_data_backup.v_addr, src, len);
6420
6421         /* Initialization instructions (3rd block) */
6422         if (init_size) {
6423                 src = &ucode->data[inst_size + data_size];
6424                 len = priv->ucode_init.len;
6425                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6426                                 len);
6427                 memcpy(priv->ucode_init.v_addr, src, len);
6428         }
6429
6430         /* Initialization data (4th block) */
6431         if (init_data_size) {
6432                 src = &ucode->data[inst_size + data_size + init_size];
6433                 len = priv->ucode_init_data.len;
6434                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
6435                                len);
6436                 memcpy(priv->ucode_init_data.v_addr, src, len);
6437         }
6438
6439         /* Bootstrap instructions (5th block) */
6440         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6441         len = priv->ucode_boot.len;
6442         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
6443         memcpy(priv->ucode_boot.v_addr, src, len);
6444
6445         /* We have our copies now, allow OS release its copies */
6446         release_firmware(ucode_raw);
6447         return 0;
6448
6449  err_pci_alloc:
6450         IWL_ERROR("failed to allocate pci memory\n");
6451         ret = -ENOMEM;
6452         iwl4965_dealloc_ucode_pci(priv);
6453
6454  err_release:
6455         release_firmware(ucode_raw);
6456
6457  error:
6458         return ret;
6459 }
6460
6461
6462 /**
6463  * iwl4965_set_ucode_ptrs - Set uCode address location
6464  *
6465  * Tell initialization uCode where to find runtime uCode.
6466  *
6467  * BSM registers initially contain pointers to initialization uCode.
6468  * We need to replace them to load runtime uCode inst and data,
6469  * and to save runtime data when powering down.
6470  */
6471 static int iwl4965_set_ucode_ptrs(struct iwl4965_priv *priv)
6472 {
6473         dma_addr_t pinst;
6474         dma_addr_t pdata;
6475         int rc = 0;
6476         unsigned long flags;
6477
6478         /* bits 35:4 for 4965 */
6479         pinst = priv->ucode_code.p_addr >> 4;
6480         pdata = priv->ucode_data_backup.p_addr >> 4;
6481
6482         spin_lock_irqsave(&priv->lock, flags);
6483         rc = iwl4965_grab_nic_access(priv);
6484         if (rc) {
6485                 spin_unlock_irqrestore(&priv->lock, flags);
6486                 return rc;
6487         }
6488
6489         /* Tell bootstrap uCode where to find image to load */
6490         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6491         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6492         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6493                                  priv->ucode_data.len);
6494
6495         /* Inst bytecount must be last to set up, bit 31 signals uCode
6496          *   that all new ptr/size info is in place */
6497         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6498                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6499
6500         iwl4965_release_nic_access(priv);
6501
6502         spin_unlock_irqrestore(&priv->lock, flags);
6503
6504         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6505
6506         return rc;
6507 }
6508
6509 /**
6510  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
6511  *
6512  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6513  *
6514  * The 4965 "initialize" ALIVE reply contains calibration data for:
6515  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6516  *   (3945 does not contain this data).
6517  *
6518  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6519 */
6520 static void iwl4965_init_alive_start(struct iwl4965_priv *priv)
6521 {
6522         /* Check alive response for "valid" sign from uCode */
6523         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6524                 /* We had an error bringing up the hardware, so take it
6525                  * all the way back down so we can try again */
6526                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6527                 goto restart;
6528         }
6529
6530         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6531          * This is a paranoid check, because we would not have gotten the
6532          * "initialize" alive if code weren't properly loaded.  */
6533         if (iwl4965_verify_ucode(priv)) {
6534                 /* Runtime instruction load was bad;
6535                  * take it all the way back down so we can try again */
6536                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6537                 goto restart;
6538         }
6539
6540         /* Calculate temperature */
6541         priv->temperature = iwl4965_get_temperature(priv);
6542
6543         /* Send pointers to protocol/runtime uCode image ... init code will
6544          * load and launch runtime uCode, which will send us another "Alive"
6545          * notification. */
6546         IWL_DEBUG_INFO("Initialization Alive received.\n");
6547         if (iwl4965_set_ucode_ptrs(priv)) {
6548                 /* Runtime instruction load won't happen;
6549                  * take it all the way back down so we can try again */
6550                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6551                 goto restart;
6552         }
6553         return;
6554
6555  restart:
6556         queue_work(priv->workqueue, &priv->restart);
6557 }
6558
6559
6560 /**
6561  * iwl4965_alive_start - called after REPLY_ALIVE notification received
6562  *                   from protocol/runtime uCode (initialization uCode's
6563  *                   Alive gets handled by iwl4965_init_alive_start()).
6564  */
6565 static void iwl4965_alive_start(struct iwl4965_priv *priv)
6566 {
6567         int rc = 0;
6568
6569         IWL_DEBUG_INFO("Runtime Alive received.\n");
6570
6571         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6572                 /* We had an error bringing up the hardware, so take it
6573                  * all the way back down so we can try again */
6574                 IWL_DEBUG_INFO("Alive failed.\n");
6575                 goto restart;
6576         }
6577
6578         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6579          * This is a paranoid check, because we would not have gotten the
6580          * "runtime" alive if code weren't properly loaded.  */
6581         if (iwl4965_verify_ucode(priv)) {
6582                 /* Runtime instruction load was bad;
6583                  * take it all the way back down so we can try again */
6584                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6585                 goto restart;
6586         }
6587
6588         iwl4965_clear_stations_table(priv);
6589
6590         rc = iwl4965_alive_notify(priv);
6591         if (rc) {
6592                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6593                             rc);
6594                 goto restart;
6595         }
6596
6597         /* After the ALIVE response, we can send host commands to 4965 uCode */
6598         set_bit(STATUS_ALIVE, &priv->status);
6599
6600         /* Clear out the uCode error bit if it is set */
6601         clear_bit(STATUS_FW_ERROR, &priv->status);
6602
6603         if (iwl4965_is_rfkill(priv))
6604                 return;
6605
6606         ieee80211_start_queues(priv->hw);
6607
6608         priv->active_rate = priv->rates_mask;
6609         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6610
6611         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6612
6613         if (iwl4965_is_associated(priv)) {
6614                 struct iwl4965_rxon_cmd *active_rxon =
6615                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
6616
6617                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6618                        sizeof(priv->staging_rxon));
6619                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6620         } else {
6621                 /* Initialize our rx_config data */
6622                 iwl4965_connection_init_rx_config(priv);
6623                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6624         }
6625
6626         /* Configure Bluetooth device coexistence support */
6627         iwl4965_send_bt_config(priv);
6628
6629         /* Configure the adapter for unassociated operation */
6630         iwl4965_commit_rxon(priv);
6631
6632         /* At this point, the NIC is initialized and operational */
6633         priv->notif_missed_beacons = 0;
6634         set_bit(STATUS_READY, &priv->status);
6635
6636         iwl4965_rf_kill_ct_config(priv);
6637
6638         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6639         wake_up_interruptible(&priv->wait_command_queue);
6640
6641         if (priv->error_recovering)
6642                 iwl4965_error_recovery(priv);
6643
6644         return;
6645
6646  restart:
6647         queue_work(priv->workqueue, &priv->restart);
6648 }
6649
6650 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv);
6651
6652 static void __iwl4965_down(struct iwl4965_priv *priv)
6653 {
6654         unsigned long flags;
6655         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6656         struct ieee80211_conf *conf = NULL;
6657
6658         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6659
6660         conf = ieee80211_get_hw_conf(priv->hw);
6661
6662         if (!exit_pending)
6663                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6664
6665         iwl4965_clear_stations_table(priv);
6666
6667         /* Unblock any waiting calls */
6668         wake_up_interruptible_all(&priv->wait_command_queue);
6669
6670         /* Wipe out the EXIT_PENDING status bit if we are not actually
6671          * exiting the module */
6672         if (!exit_pending)
6673                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6674
6675         /* stop and reset the on-board processor */
6676         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6677
6678         /* tell the device to stop sending interrupts */
6679         iwl4965_disable_interrupts(priv);
6680
6681         if (priv->mac80211_registered)
6682                 ieee80211_stop_queues(priv->hw);
6683
6684         /* If we have not previously called iwl4965_init() then
6685          * clear all bits but the RF Kill and SUSPEND bits and return */
6686         if (!iwl4965_is_init(priv)) {
6687                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6688                                         STATUS_RF_KILL_HW |
6689                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6690                                         STATUS_RF_KILL_SW |
6691                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6692                                         STATUS_GEO_CONFIGURED |
6693                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6694                                         STATUS_IN_SUSPEND;
6695                 goto exit;
6696         }
6697
6698         /* ...otherwise clear out all the status bits but the RF Kill and
6699          * SUSPEND bits and continue taking the NIC down. */
6700         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6701                                 STATUS_RF_KILL_HW |
6702                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6703                                 STATUS_RF_KILL_SW |
6704                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6705                                 STATUS_GEO_CONFIGURED |
6706                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6707                                 STATUS_IN_SUSPEND |
6708                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6709                                 STATUS_FW_ERROR;
6710
6711         spin_lock_irqsave(&priv->lock, flags);
6712         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
6713                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6714         spin_unlock_irqrestore(&priv->lock, flags);
6715
6716         iwl4965_hw_txq_ctx_stop(priv);
6717         iwl4965_hw_rxq_stop(priv);
6718
6719         spin_lock_irqsave(&priv->lock, flags);
6720         if (!iwl4965_grab_nic_access(priv)) {
6721                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
6722                                          APMG_CLK_VAL_DMA_CLK_RQT);
6723                 iwl4965_release_nic_access(priv);
6724         }
6725         spin_unlock_irqrestore(&priv->lock, flags);
6726
6727         udelay(5);
6728
6729         iwl4965_hw_nic_stop_master(priv);
6730         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6731         iwl4965_hw_nic_reset(priv);
6732
6733  exit:
6734         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6735
6736         if (priv->ibss_beacon)
6737                 dev_kfree_skb(priv->ibss_beacon);
6738         priv->ibss_beacon = NULL;
6739
6740         /* clear out any free frames */
6741         iwl4965_clear_free_frames(priv);
6742 }
6743
6744 static void iwl4965_down(struct iwl4965_priv *priv)
6745 {
6746         mutex_lock(&priv->mutex);
6747         __iwl4965_down(priv);
6748         mutex_unlock(&priv->mutex);
6749
6750         iwl4965_cancel_deferred_work(priv);
6751 }
6752
6753 #define MAX_HW_RESTARTS 5
6754
6755 static int __iwl4965_up(struct iwl4965_priv *priv)
6756 {
6757         int rc, i;
6758
6759         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6760                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6761                 return -EIO;
6762         }
6763
6764         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6765                 IWL_WARNING("Radio disabled by SW RF kill (module "
6766                             "parameter)\n");
6767                 return -ENODEV;
6768         }
6769
6770         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6771                 IWL_ERROR("ucode not available for device bringup\n");
6772                 return -EIO;
6773         }
6774
6775         /* If platform's RF_KILL switch is NOT set to KILL */
6776         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6777                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6778                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6779         else {
6780                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6781                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6782                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6783                         return -ENODEV;
6784                 }
6785         }
6786
6787         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6788
6789         rc = iwl4965_hw_nic_init(priv);
6790         if (rc) {
6791                 IWL_ERROR("Unable to int nic\n");
6792                 return rc;
6793         }
6794
6795         /* make sure rfkill handshake bits are cleared */
6796         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6797         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6798                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6799
6800         /* clear (again), then enable host interrupts */
6801         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6802         iwl4965_enable_interrupts(priv);
6803
6804         /* really make sure rfkill handshake bits are cleared */
6805         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6806         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6807
6808         /* Copy original ucode data image from disk into backup cache.
6809          * This will be used to initialize the on-board processor's
6810          * data SRAM for a clean start when the runtime program first loads. */
6811         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6812                priv->ucode_data.len);
6813
6814         /* We return success when we resume from suspend and rf_kill is on. */
6815         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6816                 return 0;
6817
6818         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6819
6820                 iwl4965_clear_stations_table(priv);
6821
6822                 /* load bootstrap state machine,
6823                  * load bootstrap program into processor's memory,
6824                  * prepare to load the "initialize" uCode */
6825                 rc = iwl4965_load_bsm(priv);
6826
6827                 if (rc) {
6828                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6829                         continue;
6830                 }
6831
6832                 /* start card; "initialize" will load runtime ucode */
6833                 iwl4965_nic_start(priv);
6834
6835                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6836
6837                 return 0;
6838         }
6839
6840         set_bit(STATUS_EXIT_PENDING, &priv->status);
6841         __iwl4965_down(priv);
6842
6843         /* tried to restart and config the device for as long as our
6844          * patience could withstand */
6845         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6846         return -EIO;
6847 }
6848
6849
6850 /*****************************************************************************
6851  *
6852  * Workqueue callbacks
6853  *
6854  *****************************************************************************/
6855
6856 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6857 {
6858         struct iwl4965_priv *priv =
6859             container_of(data, struct iwl4965_priv, init_alive_start.work);
6860
6861         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6862                 return;
6863
6864         mutex_lock(&priv->mutex);
6865         iwl4965_init_alive_start(priv);
6866         mutex_unlock(&priv->mutex);
6867 }
6868
6869 static void iwl4965_bg_alive_start(struct work_struct *data)
6870 {
6871         struct iwl4965_priv *priv =
6872             container_of(data, struct iwl4965_priv, alive_start.work);
6873
6874         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6875                 return;
6876
6877         mutex_lock(&priv->mutex);
6878         iwl4965_alive_start(priv);
6879         mutex_unlock(&priv->mutex);
6880 }
6881
6882 static void iwl4965_bg_rf_kill(struct work_struct *work)
6883 {
6884         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, rf_kill);
6885
6886         wake_up_interruptible(&priv->wait_command_queue);
6887
6888         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6889                 return;
6890
6891         mutex_lock(&priv->mutex);
6892
6893         if (!iwl4965_is_rfkill(priv)) {
6894                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6895                           "HW and/or SW RF Kill no longer active, restarting "
6896                           "device\n");
6897                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6898                         queue_work(priv->workqueue, &priv->restart);
6899         } else {
6900
6901                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6902                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6903                                           "disabled by SW switch\n");
6904                 else
6905                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6906                                     "Kill switch must be turned off for "
6907                                     "wireless networking to work.\n");
6908         }
6909         mutex_unlock(&priv->mutex);
6910 }
6911
6912 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6913
6914 static void iwl4965_bg_scan_check(struct work_struct *data)
6915 {
6916         struct iwl4965_priv *priv =
6917             container_of(data, struct iwl4965_priv, scan_check.work);
6918
6919         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6920                 return;
6921
6922         mutex_lock(&priv->mutex);
6923         if (test_bit(STATUS_SCANNING, &priv->status) ||
6924             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6925                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6926                           "Scan completion watchdog resetting adapter (%dms)\n",
6927                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6928
6929                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6930                         iwl4965_send_scan_abort(priv);
6931         }
6932         mutex_unlock(&priv->mutex);
6933 }
6934
6935 static void iwl4965_bg_request_scan(struct work_struct *data)
6936 {
6937         struct iwl4965_priv *priv =
6938             container_of(data, struct iwl4965_priv, request_scan);
6939         struct iwl4965_host_cmd cmd = {
6940                 .id = REPLY_SCAN_CMD,
6941                 .len = sizeof(struct iwl4965_scan_cmd),
6942                 .meta.flags = CMD_SIZE_HUGE,
6943         };
6944         int rc = 0;
6945         struct iwl4965_scan_cmd *scan;
6946         struct ieee80211_conf *conf = NULL;
6947         u8 direct_mask;
6948         int phymode;
6949
6950         conf = ieee80211_get_hw_conf(priv->hw);
6951
6952         mutex_lock(&priv->mutex);
6953
6954         if (!iwl4965_is_ready(priv)) {
6955                 IWL_WARNING("request scan called when driver not ready.\n");
6956                 goto done;
6957         }
6958
6959         /* Make sure the scan wasn't cancelled before this queued work
6960          * was given the chance to run... */
6961         if (!test_bit(STATUS_SCANNING, &priv->status))
6962                 goto done;
6963
6964         /* This should never be called or scheduled if there is currently
6965          * a scan active in the hardware. */
6966         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6967                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6968                                "Ignoring second request.\n");
6969                 rc = -EIO;
6970                 goto done;
6971         }
6972
6973         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6974                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6975                 goto done;
6976         }
6977
6978         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6979                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6980                 goto done;
6981         }
6982
6983         if (iwl4965_is_rfkill(priv)) {
6984                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6985                 goto done;
6986         }
6987
6988         if (!test_bit(STATUS_READY, &priv->status)) {
6989                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6990                 goto done;
6991         }
6992
6993         if (!priv->scan_bands) {
6994                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6995                 goto done;
6996         }
6997
6998         if (!priv->scan) {
6999                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
7000                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
7001                 if (!priv->scan) {
7002                         rc = -ENOMEM;
7003                         goto done;
7004                 }
7005         }
7006         scan = priv->scan;
7007         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
7008
7009         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
7010         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
7011
7012         if (iwl4965_is_associated(priv)) {
7013                 u16 interval = 0;
7014                 u32 extra;
7015                 u32 suspend_time = 100;
7016                 u32 scan_suspend_time = 100;
7017                 unsigned long flags;
7018
7019                 IWL_DEBUG_INFO("Scanning while associated...\n");
7020
7021                 spin_lock_irqsave(&priv->lock, flags);
7022                 interval = priv->beacon_int;
7023                 spin_unlock_irqrestore(&priv->lock, flags);
7024
7025                 scan->suspend_time = 0;
7026                 scan->max_out_time = cpu_to_le32(200 * 1024);
7027                 if (!interval)
7028                         interval = suspend_time;
7029
7030                 extra = (suspend_time / interval) << 22;
7031                 scan_suspend_time = (extra |
7032                     ((suspend_time % interval) * 1024));
7033                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
7034                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
7035                                scan_suspend_time, interval);
7036         }
7037
7038         /* We should add the ability for user to lock to PASSIVE ONLY */
7039         if (priv->one_direct_scan) {
7040                 IWL_DEBUG_SCAN
7041                     ("Kicking off one direct scan for '%s'\n",
7042                      iwl4965_escape_essid(priv->direct_ssid,
7043                                       priv->direct_ssid_len));
7044                 scan->direct_scan[0].id = WLAN_EID_SSID;
7045                 scan->direct_scan[0].len = priv->direct_ssid_len;
7046                 memcpy(scan->direct_scan[0].ssid,
7047                        priv->direct_ssid, priv->direct_ssid_len);
7048                 direct_mask = 1;
7049         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
7050                 scan->direct_scan[0].id = WLAN_EID_SSID;
7051                 scan->direct_scan[0].len = priv->essid_len;
7052                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
7053                 direct_mask = 1;
7054         } else
7055                 direct_mask = 0;
7056
7057         /* We don't build a direct scan probe request; the uCode will do
7058          * that based on the direct_mask added to each channel entry */
7059         scan->tx_cmd.len = cpu_to_le16(
7060                 iwl4965_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
7061                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
7062         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
7063         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
7064         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
7065
7066         /* flags + rate selection */
7067
7068         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
7069
7070         switch (priv->scan_bands) {
7071         case 2:
7072                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7073                 scan->tx_cmd.rate_n_flags =
7074                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7075                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7076
7077                 scan->good_CRC_th = 0;
7078                 phymode = MODE_IEEE80211G;
7079                 break;
7080
7081         case 1:
7082                 scan->tx_cmd.rate_n_flags =
7083                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7084                                 RATE_MCS_ANT_B_MSK);
7085                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7086                 phymode = MODE_IEEE80211A;
7087                 break;
7088
7089         default:
7090                 IWL_WARNING("Invalid scan band count\n");
7091                 goto done;
7092         }
7093
7094         /* select Rx chains */
7095
7096         /* Force use of chains B and C (0x6) for scan Rx.
7097          * Avoid A (0x1) because of its off-channel reception on A-band.
7098          * MIMO is not used here, but value is required to make uCode happy. */
7099         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7100                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7101                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7102                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7103
7104         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7105                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7106
7107         if (direct_mask)
7108                 IWL_DEBUG_SCAN
7109                     ("Initiating direct scan for %s.\n",
7110                      iwl4965_escape_essid(priv->essid, priv->essid_len));
7111         else
7112                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7113
7114         scan->channel_count =
7115                 iwl4965_get_channels_for_scan(
7116                         priv, phymode, 1, /* active */
7117                         direct_mask,
7118                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7119
7120         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7121             scan->channel_count * sizeof(struct iwl4965_scan_channel);
7122         cmd.data = scan;
7123         scan->len = cpu_to_le16(cmd.len);
7124
7125         set_bit(STATUS_SCAN_HW, &priv->status);
7126         rc = iwl4965_send_cmd_sync(priv, &cmd);
7127         if (rc)
7128                 goto done;
7129
7130         queue_delayed_work(priv->workqueue, &priv->scan_check,
7131                            IWL_SCAN_CHECK_WATCHDOG);
7132
7133         mutex_unlock(&priv->mutex);
7134         return;
7135
7136  done:
7137         /* inform mac80211 scan aborted */
7138         queue_work(priv->workqueue, &priv->scan_completed);
7139         mutex_unlock(&priv->mutex);
7140 }
7141
7142 static void iwl4965_bg_up(struct work_struct *data)
7143 {
7144         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, up);
7145
7146         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7147                 return;
7148
7149         mutex_lock(&priv->mutex);
7150         __iwl4965_up(priv);
7151         mutex_unlock(&priv->mutex);
7152 }
7153
7154 static void iwl4965_bg_restart(struct work_struct *data)
7155 {
7156         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, restart);
7157
7158         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7159                 return;
7160
7161         iwl4965_down(priv);
7162         queue_work(priv->workqueue, &priv->up);
7163 }
7164
7165 static void iwl4965_bg_rx_replenish(struct work_struct *data)
7166 {
7167         struct iwl4965_priv *priv =
7168             container_of(data, struct iwl4965_priv, rx_replenish);
7169
7170         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7171                 return;
7172
7173         mutex_lock(&priv->mutex);
7174         iwl4965_rx_replenish(priv);
7175         mutex_unlock(&priv->mutex);
7176 }
7177
7178 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7179
7180 static void iwl4965_bg_post_associate(struct work_struct *data)
7181 {
7182         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv,
7183                                              post_associate.work);
7184
7185         int rc = 0;
7186         struct ieee80211_conf *conf = NULL;
7187         DECLARE_MAC_BUF(mac);
7188
7189         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7190                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7191                 return;
7192         }
7193
7194         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7195                         priv->assoc_id,
7196                         print_mac(mac, priv->active_rxon.bssid_addr));
7197
7198
7199         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7200                 return;
7201
7202         mutex_lock(&priv->mutex);
7203
7204         if (!priv->vif || !priv->is_open) {
7205                 mutex_unlock(&priv->mutex);
7206                 return;
7207         }
7208         iwl4965_scan_cancel_timeout(priv, 200);
7209
7210         conf = ieee80211_get_hw_conf(priv->hw);
7211
7212         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7213         iwl4965_commit_rxon(priv);
7214
7215         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7216         iwl4965_setup_rxon_timing(priv);
7217         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7218                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7219         if (rc)
7220                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7221                             "Attempting to continue.\n");
7222
7223         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7224
7225 #ifdef CONFIG_IWL4965_HT
7226         if (priv->current_ht_config.is_ht)
7227                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
7228 #endif /* CONFIG_IWL4965_HT*/
7229         iwl4965_set_rxon_chain(priv);
7230         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7231
7232         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7233                         priv->assoc_id, priv->beacon_int);
7234
7235         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7236                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7237         else
7238                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7239
7240         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7241                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7242                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7243                 else
7244                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7245
7246                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7247                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7248
7249         }
7250
7251         iwl4965_commit_rxon(priv);
7252
7253         switch (priv->iw_mode) {
7254         case IEEE80211_IF_TYPE_STA:
7255                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
7256                 break;
7257
7258         case IEEE80211_IF_TYPE_IBSS:
7259
7260                 /* clear out the station table */
7261                 iwl4965_clear_stations_table(priv);
7262
7263                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7264                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
7265                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
7266                 iwl4965_send_beacon_cmd(priv);
7267
7268                 break;
7269
7270         default:
7271                 IWL_ERROR("%s Should not be called in %d mode\n",
7272                                 __FUNCTION__, priv->iw_mode);
7273                 break;
7274         }
7275
7276         iwl4965_sequence_reset(priv);
7277
7278 #ifdef CONFIG_IWL4965_SENSITIVITY
7279         /* Enable Rx differential gain and sensitivity calibrations */
7280         iwl4965_chain_noise_reset(priv);
7281         priv->start_calib = 1;
7282 #endif /* CONFIG_IWL4965_SENSITIVITY */
7283
7284         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7285                 priv->assoc_station_added = 1;
7286
7287 #ifdef CONFIG_IWL4965_QOS
7288         iwl4965_activate_qos(priv, 0);
7289 #endif /* CONFIG_IWL4965_QOS */
7290         /* we have just associated, don't start scan too early */
7291         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
7292         mutex_unlock(&priv->mutex);
7293 }
7294
7295 static void iwl4965_bg_abort_scan(struct work_struct *work)
7296 {
7297         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, abort_scan);
7298
7299         if (!iwl4965_is_ready(priv))
7300                 return;
7301
7302         mutex_lock(&priv->mutex);
7303
7304         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7305         iwl4965_send_scan_abort(priv);
7306
7307         mutex_unlock(&priv->mutex);
7308 }
7309
7310 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
7311
7312 static void iwl4965_bg_scan_completed(struct work_struct *work)
7313 {
7314         struct iwl4965_priv *priv =
7315             container_of(work, struct iwl4965_priv, scan_completed);
7316
7317         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7318
7319         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7320                 return;
7321
7322         if (test_bit(STATUS_CONF_PENDING, &priv->status))
7323                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
7324
7325         ieee80211_scan_completed(priv->hw);
7326
7327         /* Since setting the TXPOWER may have been deferred while
7328          * performing the scan, fire one off */
7329         mutex_lock(&priv->mutex);
7330         iwl4965_hw_reg_send_txpower(priv);
7331         mutex_unlock(&priv->mutex);
7332 }
7333
7334 /*****************************************************************************
7335  *
7336  * mac80211 entry point functions
7337  *
7338  *****************************************************************************/
7339
7340 #define UCODE_READY_TIMEOUT     (2 * HZ)
7341
7342 static int iwl4965_mac_start(struct ieee80211_hw *hw)
7343 {
7344         struct iwl4965_priv *priv = hw->priv;
7345         int ret;
7346
7347         IWL_DEBUG_MAC80211("enter\n");
7348
7349         if (pci_enable_device(priv->pci_dev)) {
7350                 IWL_ERROR("Fail to pci_enable_device\n");
7351                 return -ENODEV;
7352         }
7353         pci_restore_state(priv->pci_dev);
7354         pci_enable_msi(priv->pci_dev);
7355
7356         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
7357                           DRV_NAME, priv);
7358         if (ret) {
7359                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
7360                 goto out_disable_msi;
7361         }
7362
7363         /* we should be verifying the device is ready to be opened */
7364         mutex_lock(&priv->mutex);
7365
7366         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
7367         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
7368          * ucode filename and max sizes are card-specific. */
7369
7370         if (!priv->ucode_code.len) {
7371                 ret = iwl4965_read_ucode(priv);
7372                 if (ret) {
7373                         IWL_ERROR("Could not read microcode: %d\n", ret);
7374                         mutex_unlock(&priv->mutex);
7375                         goto out_release_irq;
7376                 }
7377         }
7378
7379         ret = __iwl4965_up(priv);
7380
7381         mutex_unlock(&priv->mutex);
7382
7383         if (ret)
7384                 goto out_release_irq;
7385
7386         IWL_DEBUG_INFO("Start UP work done.\n");
7387
7388         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
7389                 return 0;
7390
7391         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
7392          * mac80211 will not be run successfully. */
7393         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
7394                         test_bit(STATUS_READY, &priv->status),
7395                         UCODE_READY_TIMEOUT);
7396         if (!ret) {
7397                 if (!test_bit(STATUS_READY, &priv->status)) {
7398                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
7399                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
7400                         ret = -ETIMEDOUT;
7401                         goto out_release_irq;
7402                 }
7403         }
7404
7405         priv->is_open = 1;
7406         IWL_DEBUG_MAC80211("leave\n");
7407         return 0;
7408
7409 out_release_irq:
7410         free_irq(priv->pci_dev->irq, priv);
7411 out_disable_msi:
7412         pci_disable_msi(priv->pci_dev);
7413         pci_disable_device(priv->pci_dev);
7414         priv->is_open = 0;
7415         IWL_DEBUG_MAC80211("leave - failed\n");
7416         return ret;
7417 }
7418
7419 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
7420 {
7421         struct iwl4965_priv *priv = hw->priv;
7422
7423         IWL_DEBUG_MAC80211("enter\n");
7424
7425         if (!priv->is_open) {
7426                 IWL_DEBUG_MAC80211("leave - skip\n");
7427                 return;
7428         }
7429
7430         priv->is_open = 0;
7431
7432         if (iwl4965_is_ready_rf(priv)) {
7433                 /* stop mac, cancel any scan request and clear
7434                  * RXON_FILTER_ASSOC_MSK BIT
7435                  */
7436                 mutex_lock(&priv->mutex);
7437                 iwl4965_scan_cancel_timeout(priv, 100);
7438                 cancel_delayed_work(&priv->post_associate);
7439                 mutex_unlock(&priv->mutex);
7440         }
7441
7442         iwl4965_down(priv);
7443
7444         flush_workqueue(priv->workqueue);
7445         free_irq(priv->pci_dev->irq, priv);
7446         pci_disable_msi(priv->pci_dev);
7447         pci_save_state(priv->pci_dev);
7448         pci_disable_device(priv->pci_dev);
7449
7450         IWL_DEBUG_MAC80211("leave\n");
7451 }
7452
7453 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7454                       struct ieee80211_tx_control *ctl)
7455 {
7456         struct iwl4965_priv *priv = hw->priv;
7457
7458         IWL_DEBUG_MAC80211("enter\n");
7459
7460         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7461                 IWL_DEBUG_MAC80211("leave - monitor\n");
7462                 return -1;
7463         }
7464
7465         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7466                      ctl->tx_rate);
7467
7468         if (iwl4965_tx_skb(priv, skb, ctl))
7469                 dev_kfree_skb_any(skb);
7470
7471         IWL_DEBUG_MAC80211("leave\n");
7472         return 0;
7473 }
7474
7475 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
7476                                  struct ieee80211_if_init_conf *conf)
7477 {
7478         struct iwl4965_priv *priv = hw->priv;
7479         unsigned long flags;
7480         DECLARE_MAC_BUF(mac);
7481
7482         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7483
7484         if (priv->vif) {
7485                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7486                 return -EOPNOTSUPP;
7487         }
7488
7489         spin_lock_irqsave(&priv->lock, flags);
7490         priv->vif = conf->vif;
7491
7492         spin_unlock_irqrestore(&priv->lock, flags);
7493
7494         mutex_lock(&priv->mutex);
7495
7496         if (conf->mac_addr) {
7497                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7498                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7499         }
7500
7501         if (iwl4965_is_ready(priv))
7502                 iwl4965_set_mode(priv, conf->type);
7503
7504         mutex_unlock(&priv->mutex);
7505
7506         IWL_DEBUG_MAC80211("leave\n");
7507         return 0;
7508 }
7509
7510 /**
7511  * iwl4965_mac_config - mac80211 config callback
7512  *
7513  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7514  * be set inappropriately and the driver currently sets the hardware up to
7515  * use it whenever needed.
7516  */
7517 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7518 {
7519         struct iwl4965_priv *priv = hw->priv;
7520         const struct iwl4965_channel_info *ch_info;
7521         unsigned long flags;
7522         int ret = 0;
7523
7524         mutex_lock(&priv->mutex);
7525         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7526
7527         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7528
7529         if (!iwl4965_is_ready(priv)) {
7530                 IWL_DEBUG_MAC80211("leave - not ready\n");
7531                 ret = -EIO;
7532                 goto out;
7533         }
7534
7535         if (unlikely(!iwl4965_param_disable_hw_scan &&
7536                      test_bit(STATUS_SCANNING, &priv->status))) {
7537                 IWL_DEBUG_MAC80211("leave - scanning\n");
7538                 set_bit(STATUS_CONF_PENDING, &priv->status);
7539                 mutex_unlock(&priv->mutex);
7540                 return 0;
7541         }
7542
7543         spin_lock_irqsave(&priv->lock, flags);
7544
7545         ch_info = iwl4965_get_channel_info(priv, conf->phymode, conf->channel);
7546         if (!is_channel_valid(ch_info)) {
7547                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7548                                conf->channel, conf->phymode);
7549                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7550                 spin_unlock_irqrestore(&priv->lock, flags);
7551                 ret = -EINVAL;
7552                 goto out;
7553         }
7554
7555 #ifdef CONFIG_IWL4965_HT
7556         /* if we are switching fron ht to 2.4 clear flags
7557          * from any ht related info since 2.4 does not
7558          * support ht */
7559         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7560 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7561             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7562 #endif
7563         )
7564                 priv->staging_rxon.flags = 0;
7565 #endif /* CONFIG_IWL4965_HT */
7566
7567         iwl4965_set_rxon_channel(priv, conf->phymode, conf->channel);
7568
7569         iwl4965_set_flags_for_phymode(priv, conf->phymode);
7570
7571         /* The list of supported rates and rate mask can be different
7572          * for each phymode; since the phymode may have changed, reset
7573          * the rate mask to what mac80211 lists */
7574         iwl4965_set_rate(priv);
7575
7576         spin_unlock_irqrestore(&priv->lock, flags);
7577
7578 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7579         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7580                 iwl4965_hw_channel_switch(priv, conf->channel);
7581                 goto out;
7582         }
7583 #endif
7584
7585         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
7586
7587         if (!conf->radio_enabled) {
7588                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7589                 goto out;
7590         }
7591
7592         if (iwl4965_is_rfkill(priv)) {
7593                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7594                 ret = -EIO;
7595                 goto out;
7596         }
7597
7598         iwl4965_set_rate(priv);
7599
7600         if (memcmp(&priv->active_rxon,
7601                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7602                 iwl4965_commit_rxon(priv);
7603         else
7604                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7605
7606         IWL_DEBUG_MAC80211("leave\n");
7607
7608 out:
7609         clear_bit(STATUS_CONF_PENDING, &priv->status);
7610         mutex_unlock(&priv->mutex);
7611         return ret;
7612 }
7613
7614 static void iwl4965_config_ap(struct iwl4965_priv *priv)
7615 {
7616         int rc = 0;
7617
7618         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7619                 return;
7620
7621         /* The following should be done only at AP bring up */
7622         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7623
7624                 /* RXON - unassoc (to set timing command) */
7625                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7626                 iwl4965_commit_rxon(priv);
7627
7628                 /* RXON Timing */
7629                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7630                 iwl4965_setup_rxon_timing(priv);
7631                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7632                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7633                 if (rc)
7634                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7635                                         "Attempting to continue.\n");
7636
7637                 iwl4965_set_rxon_chain(priv);
7638
7639                 /* FIXME: what should be the assoc_id for AP? */
7640                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7641                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7642                         priv->staging_rxon.flags |=
7643                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7644                 else
7645                         priv->staging_rxon.flags &=
7646                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7647
7648                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7649                         if (priv->assoc_capability &
7650                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7651                                 priv->staging_rxon.flags |=
7652                                         RXON_FLG_SHORT_SLOT_MSK;
7653                         else
7654                                 priv->staging_rxon.flags &=
7655                                         ~RXON_FLG_SHORT_SLOT_MSK;
7656
7657                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7658                                 priv->staging_rxon.flags &=
7659                                         ~RXON_FLG_SHORT_SLOT_MSK;
7660                 }
7661                 /* restore RXON assoc */
7662                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7663                 iwl4965_commit_rxon(priv);
7664 #ifdef CONFIG_IWL4965_QOS
7665                 iwl4965_activate_qos(priv, 1);
7666 #endif
7667                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7668         }
7669         iwl4965_send_beacon_cmd(priv);
7670
7671         /* FIXME - we need to add code here to detect a totally new
7672          * configuration, reset the AP, unassoc, rxon timing, assoc,
7673          * clear sta table, add BCAST sta... */
7674 }
7675
7676 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
7677                                         struct ieee80211_vif *vif,
7678                                     struct ieee80211_if_conf *conf)
7679 {
7680         struct iwl4965_priv *priv = hw->priv;
7681         DECLARE_MAC_BUF(mac);
7682         unsigned long flags;
7683         int rc;
7684
7685         if (conf == NULL)
7686                 return -EIO;
7687
7688         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7689             (!conf->beacon || !conf->ssid_len)) {
7690                 IWL_DEBUG_MAC80211
7691                     ("Leaving in AP mode because HostAPD is not ready.\n");
7692                 return 0;
7693         }
7694
7695         if (!iwl4965_is_alive(priv))
7696                 return -EAGAIN;
7697
7698         mutex_lock(&priv->mutex);
7699
7700         if (conf->bssid)
7701                 IWL_DEBUG_MAC80211("bssid: %s\n",
7702                                    print_mac(mac, conf->bssid));
7703
7704 /*
7705  * very dubious code was here; the probe filtering flag is never set:
7706  *
7707         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7708             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7709  */
7710         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7711                 IWL_DEBUG_MAC80211("leave - scanning\n");
7712                 mutex_unlock(&priv->mutex);
7713                 return 0;
7714         }
7715
7716         if (priv->vif != vif) {
7717                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7718                 mutex_unlock(&priv->mutex);
7719                 return 0;
7720         }
7721
7722         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7723                 if (!conf->bssid) {
7724                         conf->bssid = priv->mac_addr;
7725                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7726                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7727                                            print_mac(mac, conf->bssid));
7728                 }
7729                 if (priv->ibss_beacon)
7730                         dev_kfree_skb(priv->ibss_beacon);
7731
7732                 priv->ibss_beacon = conf->beacon;
7733         }
7734
7735         if (iwl4965_is_rfkill(priv))
7736                 goto done;
7737
7738         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7739             !is_multicast_ether_addr(conf->bssid)) {
7740                 /* If there is currently a HW scan going on in the background
7741                  * then we need to cancel it else the RXON below will fail. */
7742                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7743                         IWL_WARNING("Aborted scan still in progress "
7744                                     "after 100ms\n");
7745                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7746                         mutex_unlock(&priv->mutex);
7747                         return -EAGAIN;
7748                 }
7749                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7750
7751                 /* TODO: Audit driver for usage of these members and see
7752                  * if mac80211 deprecates them (priv->bssid looks like it
7753                  * shouldn't be there, but I haven't scanned the IBSS code
7754                  * to verify) - jpk */
7755                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7756
7757                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7758                         iwl4965_config_ap(priv);
7759                 else {
7760                         rc = iwl4965_commit_rxon(priv);
7761                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7762                                 iwl4965_rxon_add_station(
7763                                         priv, priv->active_rxon.bssid_addr, 1);
7764                 }
7765
7766         } else {
7767                 iwl4965_scan_cancel_timeout(priv, 100);
7768                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7769                 iwl4965_commit_rxon(priv);
7770         }
7771
7772  done:
7773         spin_lock_irqsave(&priv->lock, flags);
7774         if (!conf->ssid_len)
7775                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7776         else
7777                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7778
7779         priv->essid_len = conf->ssid_len;
7780         spin_unlock_irqrestore(&priv->lock, flags);
7781
7782         IWL_DEBUG_MAC80211("leave\n");
7783         mutex_unlock(&priv->mutex);
7784
7785         return 0;
7786 }
7787
7788 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7789                                  unsigned int changed_flags,
7790                                  unsigned int *total_flags,
7791                                  int mc_count, struct dev_addr_list *mc_list)
7792 {
7793         /*
7794          * XXX: dummy
7795          * see also iwl4965_connection_init_rx_config
7796          */
7797         *total_flags = 0;
7798 }
7799
7800 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7801                                      struct ieee80211_if_init_conf *conf)
7802 {
7803         struct iwl4965_priv *priv = hw->priv;
7804
7805         IWL_DEBUG_MAC80211("enter\n");
7806
7807         mutex_lock(&priv->mutex);
7808
7809         if (iwl4965_is_ready_rf(priv)) {
7810                 iwl4965_scan_cancel_timeout(priv, 100);
7811                 cancel_delayed_work(&priv->post_associate);
7812                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7813                 iwl4965_commit_rxon(priv);
7814         }
7815         if (priv->vif == conf->vif) {
7816                 priv->vif = NULL;
7817                 memset(priv->bssid, 0, ETH_ALEN);
7818                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7819                 priv->essid_len = 0;
7820         }
7821         mutex_unlock(&priv->mutex);
7822
7823         IWL_DEBUG_MAC80211("leave\n");
7824
7825 }
7826
7827 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7828                                      struct ieee80211_vif *vif,
7829                                      struct ieee80211_bss_conf *bss_conf,
7830                                      u32 changes)
7831 {
7832         struct iwl4965_priv *priv = hw->priv;
7833
7834         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7835                 if (bss_conf->use_short_preamble)
7836                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7837                 else
7838                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7839         }
7840
7841         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7842                 if (bss_conf->use_cts_prot && (priv->phymode != MODE_IEEE80211A))
7843                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7844                 else
7845                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7846         }
7847
7848         if (changes & BSS_CHANGED_ASSOC) {
7849                 /*
7850                  * TODO:
7851                  * do stuff instead of sniffing assoc resp
7852                  */
7853         }
7854
7855         if (iwl4965_is_associated(priv))
7856                 iwl4965_send_rxon_assoc(priv);
7857 }
7858
7859 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7860 {
7861         int rc = 0;
7862         unsigned long flags;
7863         struct iwl4965_priv *priv = hw->priv;
7864
7865         IWL_DEBUG_MAC80211("enter\n");
7866
7867         mutex_lock(&priv->mutex);
7868         spin_lock_irqsave(&priv->lock, flags);
7869
7870         if (!iwl4965_is_ready_rf(priv)) {
7871                 rc = -EIO;
7872                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7873                 goto out_unlock;
7874         }
7875
7876         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7877                 rc = -EIO;
7878                 IWL_ERROR("ERROR: APs don't scan\n");
7879                 goto out_unlock;
7880         }
7881
7882         /* we don't schedule scan within next_scan_jiffies period */
7883         if (priv->next_scan_jiffies &&
7884                         time_after(priv->next_scan_jiffies, jiffies)) {
7885                 rc = -EAGAIN;
7886                 goto out_unlock;
7887         }
7888         /* if we just finished scan ask for delay */
7889         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7890                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7891                 rc = -EAGAIN;
7892                 goto out_unlock;
7893         }
7894         if (len) {
7895                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7896                                iwl4965_escape_essid(ssid, len), (int)len);
7897
7898                 priv->one_direct_scan = 1;
7899                 priv->direct_ssid_len = (u8)
7900                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7901                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7902         } else
7903                 priv->one_direct_scan = 0;
7904
7905         rc = iwl4965_scan_initiate(priv);
7906
7907         IWL_DEBUG_MAC80211("leave\n");
7908
7909 out_unlock:
7910         spin_unlock_irqrestore(&priv->lock, flags);
7911         mutex_unlock(&priv->mutex);
7912
7913         return rc;
7914 }
7915
7916 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7917                            const u8 *local_addr, const u8 *addr,
7918                            struct ieee80211_key_conf *key)
7919 {
7920         struct iwl4965_priv *priv = hw->priv;
7921         DECLARE_MAC_BUF(mac);
7922         int rc = 0;
7923         u8 sta_id;
7924
7925         IWL_DEBUG_MAC80211("enter\n");
7926
7927         if (!iwl4965_param_hwcrypto) {
7928                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7929                 return -EOPNOTSUPP;
7930         }
7931
7932         if (is_zero_ether_addr(addr))
7933                 /* only support pairwise keys */
7934                 return -EOPNOTSUPP;
7935
7936         sta_id = iwl4965_hw_find_station(priv, addr);
7937         if (sta_id == IWL_INVALID_STATION) {
7938                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7939                                    print_mac(mac, addr));
7940                 return -EINVAL;
7941         }
7942
7943         mutex_lock(&priv->mutex);
7944
7945         iwl4965_scan_cancel_timeout(priv, 100);
7946
7947         switch (cmd) {
7948         case  SET_KEY:
7949                 rc = iwl4965_update_sta_key_info(priv, key, sta_id);
7950                 if (!rc) {
7951                         iwl4965_set_rxon_hwcrypto(priv, 1);
7952                         iwl4965_commit_rxon(priv);
7953                         key->hw_key_idx = sta_id;
7954                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7955                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7956                 }
7957                 break;
7958         case DISABLE_KEY:
7959                 rc = iwl4965_clear_sta_key_info(priv, sta_id);
7960                 if (!rc) {
7961                         iwl4965_set_rxon_hwcrypto(priv, 0);
7962                         iwl4965_commit_rxon(priv);
7963                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7964                 }
7965                 break;
7966         default:
7967                 rc = -EINVAL;
7968         }
7969
7970         IWL_DEBUG_MAC80211("leave\n");
7971         mutex_unlock(&priv->mutex);
7972
7973         return rc;
7974 }
7975
7976 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7977                            const struct ieee80211_tx_queue_params *params)
7978 {
7979         struct iwl4965_priv *priv = hw->priv;
7980 #ifdef CONFIG_IWL4965_QOS
7981         unsigned long flags;
7982         int q;
7983 #endif /* CONFIG_IWL4965_QOS */
7984
7985         IWL_DEBUG_MAC80211("enter\n");
7986
7987         if (!iwl4965_is_ready_rf(priv)) {
7988                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7989                 return -EIO;
7990         }
7991
7992         if (queue >= AC_NUM) {
7993                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7994                 return 0;
7995         }
7996
7997 #ifdef CONFIG_IWL4965_QOS
7998         if (!priv->qos_data.qos_enable) {
7999                 priv->qos_data.qos_active = 0;
8000                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
8001                 return 0;
8002         }
8003         q = AC_NUM - 1 - queue;
8004
8005         spin_lock_irqsave(&priv->lock, flags);
8006
8007         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
8008         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
8009         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
8010         priv->qos_data.def_qos_parm.ac[q].edca_txop =
8011                         cpu_to_le16((params->burst_time * 100));
8012
8013         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
8014         priv->qos_data.qos_active = 1;
8015
8016         spin_unlock_irqrestore(&priv->lock, flags);
8017
8018         mutex_lock(&priv->mutex);
8019         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
8020                 iwl4965_activate_qos(priv, 1);
8021         else if (priv->assoc_id && iwl4965_is_associated(priv))
8022                 iwl4965_activate_qos(priv, 0);
8023
8024         mutex_unlock(&priv->mutex);
8025
8026 #endif /*CONFIG_IWL4965_QOS */
8027
8028         IWL_DEBUG_MAC80211("leave\n");
8029         return 0;
8030 }
8031
8032 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
8033                                 struct ieee80211_tx_queue_stats *stats)
8034 {
8035         struct iwl4965_priv *priv = hw->priv;
8036         int i, avail;
8037         struct iwl4965_tx_queue *txq;
8038         struct iwl4965_queue *q;
8039         unsigned long flags;
8040
8041         IWL_DEBUG_MAC80211("enter\n");
8042
8043         if (!iwl4965_is_ready_rf(priv)) {
8044                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8045                 return -EIO;
8046         }
8047
8048         spin_lock_irqsave(&priv->lock, flags);
8049
8050         for (i = 0; i < AC_NUM; i++) {
8051                 txq = &priv->txq[i];
8052                 q = &txq->q;
8053                 avail = iwl4965_queue_space(q);
8054
8055                 stats->data[i].len = q->n_window - avail;
8056                 stats->data[i].limit = q->n_window - q->high_mark;
8057                 stats->data[i].count = q->n_window;
8058
8059         }
8060         spin_unlock_irqrestore(&priv->lock, flags);
8061
8062         IWL_DEBUG_MAC80211("leave\n");
8063
8064         return 0;
8065 }
8066
8067 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
8068                              struct ieee80211_low_level_stats *stats)
8069 {
8070         IWL_DEBUG_MAC80211("enter\n");
8071         IWL_DEBUG_MAC80211("leave\n");
8072
8073         return 0;
8074 }
8075
8076 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
8077 {
8078         IWL_DEBUG_MAC80211("enter\n");
8079         IWL_DEBUG_MAC80211("leave\n");
8080
8081         return 0;
8082 }
8083
8084 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
8085 {
8086         struct iwl4965_priv *priv = hw->priv;
8087         unsigned long flags;
8088
8089         mutex_lock(&priv->mutex);
8090         IWL_DEBUG_MAC80211("enter\n");
8091
8092         priv->lq_mngr.lq_ready = 0;
8093 #ifdef CONFIG_IWL4965_HT
8094         spin_lock_irqsave(&priv->lock, flags);
8095         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
8096         spin_unlock_irqrestore(&priv->lock, flags);
8097 #endif /* CONFIG_IWL4965_HT */
8098
8099 #ifdef CONFIG_IWL4965_QOS
8100         iwl4965_reset_qos(priv);
8101 #endif
8102
8103         cancel_delayed_work(&priv->post_associate);
8104
8105         spin_lock_irqsave(&priv->lock, flags);
8106         priv->assoc_id = 0;
8107         priv->assoc_capability = 0;
8108         priv->call_post_assoc_from_beacon = 0;
8109         priv->assoc_station_added = 0;
8110
8111         /* new association get rid of ibss beacon skb */
8112         if (priv->ibss_beacon)
8113                 dev_kfree_skb(priv->ibss_beacon);
8114
8115         priv->ibss_beacon = NULL;
8116
8117         priv->beacon_int = priv->hw->conf.beacon_int;
8118         priv->timestamp1 = 0;
8119         priv->timestamp0 = 0;
8120         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
8121                 priv->beacon_int = 0;
8122
8123         spin_unlock_irqrestore(&priv->lock, flags);
8124
8125         if (!iwl4965_is_ready_rf(priv)) {
8126                 IWL_DEBUG_MAC80211("leave - not ready\n");
8127                 mutex_unlock(&priv->mutex);
8128                 return;
8129         }
8130
8131         /* we are restarting association process
8132          * clear RXON_FILTER_ASSOC_MSK bit
8133          */
8134         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
8135                 iwl4965_scan_cancel_timeout(priv, 100);
8136                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
8137                 iwl4965_commit_rxon(priv);
8138         }
8139
8140         /* Per mac80211.h: This is only used in IBSS mode... */
8141         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8142
8143                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
8144                 mutex_unlock(&priv->mutex);
8145                 return;
8146         }
8147
8148         priv->only_active_channel = 0;
8149
8150         iwl4965_set_rate(priv);
8151
8152         mutex_unlock(&priv->mutex);
8153
8154         IWL_DEBUG_MAC80211("leave\n");
8155 }
8156
8157 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
8158                                  struct ieee80211_tx_control *control)
8159 {
8160         struct iwl4965_priv *priv = hw->priv;
8161         unsigned long flags;
8162
8163         mutex_lock(&priv->mutex);
8164         IWL_DEBUG_MAC80211("enter\n");
8165
8166         if (!iwl4965_is_ready_rf(priv)) {
8167                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8168                 mutex_unlock(&priv->mutex);
8169                 return -EIO;
8170         }
8171
8172         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8173                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8174                 mutex_unlock(&priv->mutex);
8175                 return -EIO;
8176         }
8177
8178         spin_lock_irqsave(&priv->lock, flags);
8179
8180         if (priv->ibss_beacon)
8181                 dev_kfree_skb(priv->ibss_beacon);
8182
8183         priv->ibss_beacon = skb;
8184
8185         priv->assoc_id = 0;
8186
8187         IWL_DEBUG_MAC80211("leave\n");
8188         spin_unlock_irqrestore(&priv->lock, flags);
8189
8190 #ifdef CONFIG_IWL4965_QOS
8191         iwl4965_reset_qos(priv);
8192 #endif
8193
8194         queue_work(priv->workqueue, &priv->post_associate.work);
8195
8196         mutex_unlock(&priv->mutex);
8197
8198         return 0;
8199 }
8200
8201 #ifdef CONFIG_IWL4965_HT
8202
8203 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
8204                                  struct iwl4965_priv *priv)
8205 {
8206         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
8207         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
8208         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
8209
8210         IWL_DEBUG_MAC80211("enter: \n");
8211
8212         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
8213                 iwl_conf->is_ht = 0;
8214                 return;
8215         }
8216
8217         iwl_conf->is_ht = 1;
8218         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8219
8220         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
8221                 iwl_conf->sgf |= 0x1;
8222         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
8223                 iwl_conf->sgf |= 0x2;
8224
8225         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
8226         iwl_conf->max_amsdu_size =
8227                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
8228         iwl_conf->supported_chan_width =
8229                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
8230         iwl_conf->tx_mimo_ps_mode =
8231                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8232         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
8233
8234         iwl_conf->control_channel = ht_bss_conf->primary_channel;
8235         iwl_conf->extension_chan_offset =
8236                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
8237         iwl_conf->tx_chan_width =
8238                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
8239         iwl_conf->ht_protection =
8240                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
8241         iwl_conf->non_GF_STA_present =
8242                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
8243
8244         IWL_DEBUG_MAC80211("control channel %d\n",
8245                 iwl_conf->control_channel);
8246         IWL_DEBUG_MAC80211("leave\n");
8247 }
8248
8249 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
8250                                struct ieee80211_conf *conf)
8251 {
8252         struct iwl4965_priv *priv = hw->priv;
8253
8254         IWL_DEBUG_MAC80211("enter: \n");
8255
8256         iwl4965_ht_info_fill(conf, priv);
8257         iwl4965_set_rxon_chain(priv);
8258
8259         if (priv && priv->assoc_id &&
8260             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8261                 unsigned long flags;
8262
8263                 spin_lock_irqsave(&priv->lock, flags);
8264                 if (priv->beacon_int)
8265                         queue_work(priv->workqueue, &priv->post_associate.work);
8266                 else
8267                         priv->call_post_assoc_from_beacon = 1;
8268                 spin_unlock_irqrestore(&priv->lock, flags);
8269         }
8270
8271         IWL_DEBUG_MAC80211("leave:\n");
8272         return 0;
8273 }
8274
8275 static void iwl4965_set_ht_capab(struct ieee80211_hw *hw,
8276                         struct ieee80211_ht_cap *ht_cap,
8277                         u8 use_current_config)
8278 {
8279         struct ieee80211_conf *conf = &hw->conf;
8280         struct ieee80211_hw_mode *mode = conf->mode;
8281
8282         if (use_current_config) {
8283                 ht_cap->cap_info = cpu_to_le16(conf->ht_conf.cap);
8284                 memcpy(ht_cap->supp_mcs_set,
8285                                 conf->ht_conf.supp_mcs_set, 16);
8286         } else {
8287                 ht_cap->cap_info = cpu_to_le16(mode->ht_info.cap);
8288                 memcpy(ht_cap->supp_mcs_set,
8289                                 mode->ht_info.supp_mcs_set, 16);
8290         }
8291         ht_cap->ampdu_params_info =
8292                 (mode->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
8293                 ((mode->ht_info.ampdu_density << 2) &
8294                                         IEEE80211_HT_CAP_AMPDU_DENSITY);
8295 }
8296
8297 #endif /*CONFIG_IWL4965_HT*/
8298
8299 /*****************************************************************************
8300  *
8301  * sysfs attributes
8302  *
8303  *****************************************************************************/
8304
8305 #ifdef CONFIG_IWL4965_DEBUG
8306
8307 /*
8308  * The following adds a new attribute to the sysfs representation
8309  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8310  * used for controlling the debug level.
8311  *
8312  * See the level definitions in iwl for details.
8313  */
8314
8315 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8316 {
8317         return sprintf(buf, "0x%08X\n", iwl4965_debug_level);
8318 }
8319 static ssize_t store_debug_level(struct device_driver *d,
8320                                  const char *buf, size_t count)
8321 {
8322         char *p = (char *)buf;
8323         u32 val;
8324
8325         val = simple_strtoul(p, &p, 0);
8326         if (p == buf)
8327                 printk(KERN_INFO DRV_NAME
8328                        ": %s is not in hex or decimal form.\n", buf);
8329         else
8330                 iwl4965_debug_level = val;
8331
8332         return strnlen(buf, count);
8333 }
8334
8335 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8336                    show_debug_level, store_debug_level);
8337
8338 #endif /* CONFIG_IWL4965_DEBUG */
8339
8340 static ssize_t show_rf_kill(struct device *d,
8341                             struct device_attribute *attr, char *buf)
8342 {
8343         /*
8344          * 0 - RF kill not enabled
8345          * 1 - SW based RF kill active (sysfs)
8346          * 2 - HW based RF kill active
8347          * 3 - Both HW and SW based RF kill active
8348          */
8349         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8350         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8351                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8352
8353         return sprintf(buf, "%i\n", val);
8354 }
8355
8356 static ssize_t store_rf_kill(struct device *d,
8357                              struct device_attribute *attr,
8358                              const char *buf, size_t count)
8359 {
8360         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8361
8362         mutex_lock(&priv->mutex);
8363         iwl4965_radio_kill_sw(priv, buf[0] == '1');
8364         mutex_unlock(&priv->mutex);
8365
8366         return count;
8367 }
8368
8369 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8370
8371 static ssize_t show_temperature(struct device *d,
8372                                 struct device_attribute *attr, char *buf)
8373 {
8374         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8375
8376         if (!iwl4965_is_alive(priv))
8377                 return -EAGAIN;
8378
8379         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
8380 }
8381
8382 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8383
8384 static ssize_t show_rs_window(struct device *d,
8385                               struct device_attribute *attr,
8386                               char *buf)
8387 {
8388         struct iwl4965_priv *priv = d->driver_data;
8389         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8390 }
8391 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8392
8393 static ssize_t show_tx_power(struct device *d,
8394                              struct device_attribute *attr, char *buf)
8395 {
8396         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8397         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8398 }
8399
8400 static ssize_t store_tx_power(struct device *d,
8401                               struct device_attribute *attr,
8402                               const char *buf, size_t count)
8403 {
8404         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8405         char *p = (char *)buf;
8406         u32 val;
8407
8408         val = simple_strtoul(p, &p, 10);
8409         if (p == buf)
8410                 printk(KERN_INFO DRV_NAME
8411                        ": %s is not in decimal form.\n", buf);
8412         else
8413                 iwl4965_hw_reg_set_txpower(priv, val);
8414
8415         return count;
8416 }
8417
8418 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8419
8420 static ssize_t show_flags(struct device *d,
8421                           struct device_attribute *attr, char *buf)
8422 {
8423         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8424
8425         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8426 }
8427
8428 static ssize_t store_flags(struct device *d,
8429                            struct device_attribute *attr,
8430                            const char *buf, size_t count)
8431 {
8432         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8433         u32 flags = simple_strtoul(buf, NULL, 0);
8434
8435         mutex_lock(&priv->mutex);
8436         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8437                 /* Cancel any currently running scans... */
8438                 if (iwl4965_scan_cancel_timeout(priv, 100))
8439                         IWL_WARNING("Could not cancel scan.\n");
8440                 else {
8441                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8442                                        flags);
8443                         priv->staging_rxon.flags = cpu_to_le32(flags);
8444                         iwl4965_commit_rxon(priv);
8445                 }
8446         }
8447         mutex_unlock(&priv->mutex);
8448
8449         return count;
8450 }
8451
8452 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8453
8454 static ssize_t show_filter_flags(struct device *d,
8455                                  struct device_attribute *attr, char *buf)
8456 {
8457         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8458
8459         return sprintf(buf, "0x%04X\n",
8460                 le32_to_cpu(priv->active_rxon.filter_flags));
8461 }
8462
8463 static ssize_t store_filter_flags(struct device *d,
8464                                   struct device_attribute *attr,
8465                                   const char *buf, size_t count)
8466 {
8467         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8468         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8469
8470         mutex_lock(&priv->mutex);
8471         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8472                 /* Cancel any currently running scans... */
8473                 if (iwl4965_scan_cancel_timeout(priv, 100))
8474                         IWL_WARNING("Could not cancel scan.\n");
8475                 else {
8476                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8477                                        "0x%04X\n", filter_flags);
8478                         priv->staging_rxon.filter_flags =
8479                                 cpu_to_le32(filter_flags);
8480                         iwl4965_commit_rxon(priv);
8481                 }
8482         }
8483         mutex_unlock(&priv->mutex);
8484
8485         return count;
8486 }
8487
8488 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8489                    store_filter_flags);
8490
8491 static ssize_t show_tune(struct device *d,
8492                          struct device_attribute *attr, char *buf)
8493 {
8494         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8495
8496         return sprintf(buf, "0x%04X\n",
8497                        (priv->phymode << 8) |
8498                         le16_to_cpu(priv->active_rxon.channel));
8499 }
8500
8501 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode);
8502
8503 static ssize_t store_tune(struct device *d,
8504                           struct device_attribute *attr,
8505                           const char *buf, size_t count)
8506 {
8507         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8508         char *p = (char *)buf;
8509         u16 tune = simple_strtoul(p, &p, 0);
8510         u8 phymode = (tune >> 8) & 0xff;
8511         u16 channel = tune & 0xff;
8512
8513         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8514
8515         mutex_lock(&priv->mutex);
8516         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8517             (priv->phymode != phymode)) {
8518                 const struct iwl4965_channel_info *ch_info;
8519
8520                 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
8521                 if (!ch_info) {
8522                         IWL_WARNING("Requested invalid phymode/channel "
8523                                     "combination: %d %d\n", phymode, channel);
8524                         mutex_unlock(&priv->mutex);
8525                         return -EINVAL;
8526                 }
8527
8528                 /* Cancel any currently running scans... */
8529                 if (iwl4965_scan_cancel_timeout(priv, 100))
8530                         IWL_WARNING("Could not cancel scan.\n");
8531                 else {
8532                         IWL_DEBUG_INFO("Committing phymode and "
8533                                        "rxon.channel = %d %d\n",
8534                                        phymode, channel);
8535
8536                         iwl4965_set_rxon_channel(priv, phymode, channel);
8537                         iwl4965_set_flags_for_phymode(priv, phymode);
8538
8539                         iwl4965_set_rate(priv);
8540                         iwl4965_commit_rxon(priv);
8541                 }
8542         }
8543         mutex_unlock(&priv->mutex);
8544
8545         return count;
8546 }
8547
8548 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8549
8550 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8551
8552 static ssize_t show_measurement(struct device *d,
8553                                 struct device_attribute *attr, char *buf)
8554 {
8555         struct iwl4965_priv *priv = dev_get_drvdata(d);
8556         struct iwl4965_spectrum_notification measure_report;
8557         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8558         u8 *data = (u8 *) & measure_report;
8559         unsigned long flags;
8560
8561         spin_lock_irqsave(&priv->lock, flags);
8562         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8563                 spin_unlock_irqrestore(&priv->lock, flags);
8564                 return 0;
8565         }
8566         memcpy(&measure_report, &priv->measure_report, size);
8567         priv->measurement_status = 0;
8568         spin_unlock_irqrestore(&priv->lock, flags);
8569
8570         while (size && (PAGE_SIZE - len)) {
8571                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8572                                    PAGE_SIZE - len, 1);
8573                 len = strlen(buf);
8574                 if (PAGE_SIZE - len)
8575                         buf[len++] = '\n';
8576
8577                 ofs += 16;
8578                 size -= min(size, 16U);
8579         }
8580
8581         return len;
8582 }
8583
8584 static ssize_t store_measurement(struct device *d,
8585                                  struct device_attribute *attr,
8586                                  const char *buf, size_t count)
8587 {
8588         struct iwl4965_priv *priv = dev_get_drvdata(d);
8589         struct ieee80211_measurement_params params = {
8590                 .channel = le16_to_cpu(priv->active_rxon.channel),
8591                 .start_time = cpu_to_le64(priv->last_tsf),
8592                 .duration = cpu_to_le16(1),
8593         };
8594         u8 type = IWL_MEASURE_BASIC;
8595         u8 buffer[32];
8596         u8 channel;
8597
8598         if (count) {
8599                 char *p = buffer;
8600                 strncpy(buffer, buf, min(sizeof(buffer), count));
8601                 channel = simple_strtoul(p, NULL, 0);
8602                 if (channel)
8603                         params.channel = channel;
8604
8605                 p = buffer;
8606                 while (*p && *p != ' ')
8607                         p++;
8608                 if (*p)
8609                         type = simple_strtoul(p + 1, NULL, 0);
8610         }
8611
8612         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8613                        "channel %d (for '%s')\n", type, params.channel, buf);
8614         iwl4965_get_measurement(priv, &params, type);
8615
8616         return count;
8617 }
8618
8619 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8620                    show_measurement, store_measurement);
8621 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
8622
8623 static ssize_t store_retry_rate(struct device *d,
8624                                 struct device_attribute *attr,
8625                                 const char *buf, size_t count)
8626 {
8627         struct iwl4965_priv *priv = dev_get_drvdata(d);
8628
8629         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8630         if (priv->retry_rate <= 0)
8631                 priv->retry_rate = 1;
8632
8633         return count;
8634 }
8635
8636 static ssize_t show_retry_rate(struct device *d,
8637                                struct device_attribute *attr, char *buf)
8638 {
8639         struct iwl4965_priv *priv = dev_get_drvdata(d);
8640         return sprintf(buf, "%d", priv->retry_rate);
8641 }
8642
8643 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8644                    store_retry_rate);
8645
8646 static ssize_t store_power_level(struct device *d,
8647                                  struct device_attribute *attr,
8648                                  const char *buf, size_t count)
8649 {
8650         struct iwl4965_priv *priv = dev_get_drvdata(d);
8651         int rc;
8652         int mode;
8653
8654         mode = simple_strtoul(buf, NULL, 0);
8655         mutex_lock(&priv->mutex);
8656
8657         if (!iwl4965_is_ready(priv)) {
8658                 rc = -EAGAIN;
8659                 goto out;
8660         }
8661
8662         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8663                 mode = IWL_POWER_AC;
8664         else
8665                 mode |= IWL_POWER_ENABLED;
8666
8667         if (mode != priv->power_mode) {
8668                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8669                 if (rc) {
8670                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8671                         goto out;
8672                 }
8673                 priv->power_mode = mode;
8674         }
8675
8676         rc = count;
8677
8678  out:
8679         mutex_unlock(&priv->mutex);
8680         return rc;
8681 }
8682
8683 #define MAX_WX_STRING 80
8684
8685 /* Values are in microsecond */
8686 static const s32 timeout_duration[] = {
8687         350000,
8688         250000,
8689         75000,
8690         37000,
8691         25000,
8692 };
8693 static const s32 period_duration[] = {
8694         400000,
8695         700000,
8696         1000000,
8697         1000000,
8698         1000000
8699 };
8700
8701 static ssize_t show_power_level(struct device *d,
8702                                 struct device_attribute *attr, char *buf)
8703 {
8704         struct iwl4965_priv *priv = dev_get_drvdata(d);
8705         int level = IWL_POWER_LEVEL(priv->power_mode);
8706         char *p = buf;
8707
8708         p += sprintf(p, "%d ", level);
8709         switch (level) {
8710         case IWL_POWER_MODE_CAM:
8711         case IWL_POWER_AC:
8712                 p += sprintf(p, "(AC)");
8713                 break;
8714         case IWL_POWER_BATTERY:
8715                 p += sprintf(p, "(BATTERY)");
8716                 break;
8717         default:
8718                 p += sprintf(p,
8719                              "(Timeout %dms, Period %dms)",
8720                              timeout_duration[level - 1] / 1000,
8721                              period_duration[level - 1] / 1000);
8722         }
8723
8724         if (!(priv->power_mode & IWL_POWER_ENABLED))
8725                 p += sprintf(p, " OFF\n");
8726         else
8727                 p += sprintf(p, " \n");
8728
8729         return (p - buf + 1);
8730
8731 }
8732
8733 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8734                    store_power_level);
8735
8736 static ssize_t show_channels(struct device *d,
8737                              struct device_attribute *attr, char *buf)
8738 {
8739         struct iwl4965_priv *priv = dev_get_drvdata(d);
8740         int len = 0, i;
8741         struct ieee80211_channel *channels = NULL;
8742         const struct ieee80211_hw_mode *hw_mode = NULL;
8743         int count = 0;
8744
8745         if (!iwl4965_is_ready(priv))
8746                 return -EAGAIN;
8747
8748         hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211G);
8749         if (!hw_mode)
8750                 hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211B);
8751         if (hw_mode) {
8752                 channels = hw_mode->channels;
8753                 count = hw_mode->num_channels;
8754         }
8755
8756         len +=
8757             sprintf(&buf[len],
8758                     "Displaying %d channels in 2.4GHz band "
8759                     "(802.11bg):\n", count);
8760
8761         for (i = 0; i < count; i++)
8762                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8763                                channels[i].chan,
8764                                channels[i].power_level,
8765                                channels[i].
8766                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8767                                " (IEEE 802.11h required)" : "",
8768                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8769                                 || (channels[i].
8770                                     flag &
8771                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8772                                ", IBSS",
8773                                channels[i].
8774                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8775                                "active/passive" : "passive only");
8776
8777         hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211A);
8778         if (hw_mode) {
8779                 channels = hw_mode->channels;
8780                 count = hw_mode->num_channels;
8781         } else {
8782                 channels = NULL;
8783                 count = 0;
8784         }
8785
8786         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8787                        "(802.11a):\n", count);
8788
8789         for (i = 0; i < count; i++)
8790                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8791                                channels[i].chan,
8792                                channels[i].power_level,
8793                                channels[i].
8794                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8795                                " (IEEE 802.11h required)" : "",
8796                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8797                                 || (channels[i].
8798                                     flag &
8799                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8800                                ", IBSS",
8801                                channels[i].
8802                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8803                                "active/passive" : "passive only");
8804
8805         return len;
8806 }
8807
8808 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8809
8810 static ssize_t show_statistics(struct device *d,
8811                                struct device_attribute *attr, char *buf)
8812 {
8813         struct iwl4965_priv *priv = dev_get_drvdata(d);
8814         u32 size = sizeof(struct iwl4965_notif_statistics);
8815         u32 len = 0, ofs = 0;
8816         u8 *data = (u8 *) & priv->statistics;
8817         int rc = 0;
8818
8819         if (!iwl4965_is_alive(priv))
8820                 return -EAGAIN;
8821
8822         mutex_lock(&priv->mutex);
8823         rc = iwl4965_send_statistics_request(priv);
8824         mutex_unlock(&priv->mutex);
8825
8826         if (rc) {
8827                 len = sprintf(buf,
8828                               "Error sending statistics request: 0x%08X\n", rc);
8829                 return len;
8830         }
8831
8832         while (size && (PAGE_SIZE - len)) {
8833                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8834                                    PAGE_SIZE - len, 1);
8835                 len = strlen(buf);
8836                 if (PAGE_SIZE - len)
8837                         buf[len++] = '\n';
8838
8839                 ofs += 16;
8840                 size -= min(size, 16U);
8841         }
8842
8843         return len;
8844 }
8845
8846 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8847
8848 static ssize_t show_antenna(struct device *d,
8849                             struct device_attribute *attr, char *buf)
8850 {
8851         struct iwl4965_priv *priv = dev_get_drvdata(d);
8852
8853         if (!iwl4965_is_alive(priv))
8854                 return -EAGAIN;
8855
8856         return sprintf(buf, "%d\n", priv->antenna);
8857 }
8858
8859 static ssize_t store_antenna(struct device *d,
8860                              struct device_attribute *attr,
8861                              const char *buf, size_t count)
8862 {
8863         int ant;
8864         struct iwl4965_priv *priv = dev_get_drvdata(d);
8865
8866         if (count == 0)
8867                 return 0;
8868
8869         if (sscanf(buf, "%1i", &ant) != 1) {
8870                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8871                 return count;
8872         }
8873
8874         if ((ant >= 0) && (ant <= 2)) {
8875                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8876                 priv->antenna = (enum iwl4965_antenna)ant;
8877         } else
8878                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8879
8880
8881         return count;
8882 }
8883
8884 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8885
8886 static ssize_t show_status(struct device *d,
8887                            struct device_attribute *attr, char *buf)
8888 {
8889         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8890         if (!iwl4965_is_alive(priv))
8891                 return -EAGAIN;
8892         return sprintf(buf, "0x%08x\n", (int)priv->status);
8893 }
8894
8895 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8896
8897 static ssize_t dump_error_log(struct device *d,
8898                               struct device_attribute *attr,
8899                               const char *buf, size_t count)
8900 {
8901         char *p = (char *)buf;
8902
8903         if (p[0] == '1')
8904                 iwl4965_dump_nic_error_log((struct iwl4965_priv *)d->driver_data);
8905
8906         return strnlen(buf, count);
8907 }
8908
8909 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8910
8911 static ssize_t dump_event_log(struct device *d,
8912                               struct device_attribute *attr,
8913                               const char *buf, size_t count)
8914 {
8915         char *p = (char *)buf;
8916
8917         if (p[0] == '1')
8918                 iwl4965_dump_nic_event_log((struct iwl4965_priv *)d->driver_data);
8919
8920         return strnlen(buf, count);
8921 }
8922
8923 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8924
8925 /*****************************************************************************
8926  *
8927  * driver setup and teardown
8928  *
8929  *****************************************************************************/
8930
8931 static void iwl4965_setup_deferred_work(struct iwl4965_priv *priv)
8932 {
8933         priv->workqueue = create_workqueue(DRV_NAME);
8934
8935         init_waitqueue_head(&priv->wait_command_queue);
8936
8937         INIT_WORK(&priv->up, iwl4965_bg_up);
8938         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8939         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8940         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8941         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8942         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8943         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8944         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8945         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8946         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8947         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8948         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8949
8950         iwl4965_hw_setup_deferred_work(priv);
8951
8952         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8953                      iwl4965_irq_tasklet, (unsigned long)priv);
8954 }
8955
8956 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv)
8957 {
8958         iwl4965_hw_cancel_deferred_work(priv);
8959
8960         cancel_delayed_work_sync(&priv->init_alive_start);
8961         cancel_delayed_work(&priv->scan_check);
8962         cancel_delayed_work(&priv->alive_start);
8963         cancel_delayed_work(&priv->post_associate);
8964         cancel_work_sync(&priv->beacon_update);
8965 }
8966
8967 static struct attribute *iwl4965_sysfs_entries[] = {
8968         &dev_attr_antenna.attr,
8969         &dev_attr_channels.attr,
8970         &dev_attr_dump_errors.attr,
8971         &dev_attr_dump_events.attr,
8972         &dev_attr_flags.attr,
8973         &dev_attr_filter_flags.attr,
8974 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8975         &dev_attr_measurement.attr,
8976 #endif
8977         &dev_attr_power_level.attr,
8978         &dev_attr_retry_rate.attr,
8979         &dev_attr_rf_kill.attr,
8980         &dev_attr_rs_window.attr,
8981         &dev_attr_statistics.attr,
8982         &dev_attr_status.attr,
8983         &dev_attr_temperature.attr,
8984         &dev_attr_tune.attr,
8985         &dev_attr_tx_power.attr,
8986
8987         NULL
8988 };
8989
8990 static struct attribute_group iwl4965_attribute_group = {
8991         .name = NULL,           /* put in device directory */
8992         .attrs = iwl4965_sysfs_entries,
8993 };
8994
8995 static struct ieee80211_ops iwl4965_hw_ops = {
8996         .tx = iwl4965_mac_tx,
8997         .start = iwl4965_mac_start,
8998         .stop = iwl4965_mac_stop,
8999         .add_interface = iwl4965_mac_add_interface,
9000         .remove_interface = iwl4965_mac_remove_interface,
9001         .config = iwl4965_mac_config,
9002         .config_interface = iwl4965_mac_config_interface,
9003         .configure_filter = iwl4965_configure_filter,
9004         .set_key = iwl4965_mac_set_key,
9005         .get_stats = iwl4965_mac_get_stats,
9006         .get_tx_stats = iwl4965_mac_get_tx_stats,
9007         .conf_tx = iwl4965_mac_conf_tx,
9008         .get_tsf = iwl4965_mac_get_tsf,
9009         .reset_tsf = iwl4965_mac_reset_tsf,
9010         .beacon_update = iwl4965_mac_beacon_update,
9011         .bss_info_changed = iwl4965_bss_info_changed,
9012 #ifdef CONFIG_IWL4965_HT
9013         .conf_ht = iwl4965_mac_conf_ht,
9014         .ampdu_action = iwl4965_mac_ampdu_action,
9015 #endif  /* CONFIG_IWL4965_HT */
9016         .hw_scan = iwl4965_mac_hw_scan
9017 };
9018
9019 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9020 {
9021         int err = 0;
9022         struct iwl4965_priv *priv;
9023         struct ieee80211_hw *hw;
9024         int i;
9025         DECLARE_MAC_BUF(mac);
9026
9027         /* Disabling hardware scan means that mac80211 will perform scans
9028          * "the hard way", rather than using device's scan. */
9029         if (iwl4965_param_disable_hw_scan) {
9030                 IWL_DEBUG_INFO("Disabling hw_scan\n");
9031                 iwl4965_hw_ops.hw_scan = NULL;
9032         }
9033
9034         if ((iwl4965_param_queues_num > IWL_MAX_NUM_QUEUES) ||
9035             (iwl4965_param_queues_num < IWL_MIN_NUM_QUEUES)) {
9036                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
9037                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
9038                 err = -EINVAL;
9039                 goto out;
9040         }
9041
9042         /* mac80211 allocates memory for this device instance, including
9043          *   space for this driver's private structure */
9044         hw = ieee80211_alloc_hw(sizeof(struct iwl4965_priv), &iwl4965_hw_ops);
9045         if (hw == NULL) {
9046                 IWL_ERROR("Can not allocate network device\n");
9047                 err = -ENOMEM;
9048                 goto out;
9049         }
9050         SET_IEEE80211_DEV(hw, &pdev->dev);
9051
9052         hw->rate_control_algorithm = "iwl-4965-rs";
9053
9054         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
9055         priv = hw->priv;
9056         priv->hw = hw;
9057
9058         priv->pci_dev = pdev;
9059         priv->antenna = (enum iwl4965_antenna)iwl4965_param_antenna;
9060 #ifdef CONFIG_IWL4965_DEBUG
9061         iwl4965_debug_level = iwl4965_param_debug;
9062         atomic_set(&priv->restrict_refcnt, 0);
9063 #endif
9064         priv->retry_rate = 1;
9065
9066         priv->ibss_beacon = NULL;
9067
9068         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
9069          *   the range of signal quality values that we'll provide.
9070          * Negative values for level/noise indicate that we'll provide dBm.
9071          * For WE, at least, non-0 values here *enable* display of values
9072          *   in app (iwconfig). */
9073         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
9074         hw->max_noise = -20;    /* noise level, negative indicates dBm */
9075         hw->max_signal = 100;   /* link quality indication (%) */
9076
9077         /* Tell mac80211 our Tx characteristics */
9078         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9079
9080         /* Default value; 4 EDCA QOS priorities */
9081         hw->queues = 4;
9082 #ifdef CONFIG_IWL4965_HT
9083         /* Enhanced value; more queues, to support 11n aggregation */
9084         hw->queues = 16;
9085 #endif /* CONFIG_IWL4965_HT */
9086
9087         spin_lock_init(&priv->lock);
9088         spin_lock_init(&priv->power_data.lock);
9089         spin_lock_init(&priv->sta_lock);
9090         spin_lock_init(&priv->hcmd_lock);
9091         spin_lock_init(&priv->lq_mngr.lock);
9092
9093         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9094                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9095
9096         INIT_LIST_HEAD(&priv->free_frames);
9097
9098         mutex_init(&priv->mutex);
9099         if (pci_enable_device(pdev)) {
9100                 err = -ENODEV;
9101                 goto out_ieee80211_free_hw;
9102         }
9103
9104         pci_set_master(pdev);
9105
9106         /* Clear the driver's (not device's) station table */
9107         iwl4965_clear_stations_table(priv);
9108
9109         priv->data_retry_limit = -1;
9110         priv->ieee_channels = NULL;
9111         priv->ieee_rates = NULL;
9112         priv->phymode = -1;
9113
9114         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9115         if (!err)
9116                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9117         if (err) {
9118                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9119                 goto out_pci_disable_device;
9120         }
9121
9122         pci_set_drvdata(pdev, priv);
9123         err = pci_request_regions(pdev, DRV_NAME);
9124         if (err)
9125                 goto out_pci_disable_device;
9126
9127         /* We disable the RETRY_TIMEOUT register (0x41) to keep
9128          * PCI Tx retries from interfering with C3 CPU state */
9129         pci_write_config_byte(pdev, 0x41, 0x00);
9130
9131         priv->hw_base = pci_iomap(pdev, 0, 0);
9132         if (!priv->hw_base) {
9133                 err = -ENODEV;
9134                 goto out_pci_release_regions;
9135         }
9136
9137         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9138                         (unsigned long long) pci_resource_len(pdev, 0));
9139         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9140
9141         /* Initialize module parameter values here */
9142
9143         /* Disable radio (SW RF KILL) via parameter when loading driver */
9144         if (iwl4965_param_disable) {
9145                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9146                 IWL_DEBUG_INFO("Radio disabled.\n");
9147         }
9148
9149         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9150
9151         priv->ps_mode = 0;
9152         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9153         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9154         priv->ps_mode = IWL_MIMO_PS_NONE;
9155
9156         /* Choose which receivers/antennas to use */
9157         iwl4965_set_rxon_chain(priv);
9158
9159         printk(KERN_INFO DRV_NAME
9160                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9161
9162         /* Device-specific setup */
9163         if (iwl4965_hw_set_hw_setting(priv)) {
9164                 IWL_ERROR("failed to set hw settings\n");
9165                 goto out_iounmap;
9166         }
9167
9168 #ifdef CONFIG_IWL4965_QOS
9169         if (iwl4965_param_qos_enable)
9170                 priv->qos_data.qos_enable = 1;
9171
9172         iwl4965_reset_qos(priv);
9173
9174         priv->qos_data.qos_active = 0;
9175         priv->qos_data.qos_cap.val = 0;
9176 #endif /* CONFIG_IWL4965_QOS */
9177
9178         iwl4965_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9179         iwl4965_setup_deferred_work(priv);
9180         iwl4965_setup_rx_handlers(priv);
9181
9182         priv->rates_mask = IWL_RATES_MASK;
9183         /* If power management is turned on, default to AC mode */
9184         priv->power_mode = IWL_POWER_AC;
9185         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9186
9187         iwl4965_disable_interrupts(priv);
9188
9189         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9190         if (err) {
9191                 IWL_ERROR("failed to create sysfs device attributes\n");
9192                 goto out_release_irq;
9193         }
9194
9195         /* nic init */
9196         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
9197                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
9198
9199         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
9200         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
9201                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
9202                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
9203         if (err < 0) {
9204                 IWL_DEBUG_INFO("Failed to init the card\n");
9205                 goto out_remove_sysfs;
9206         }
9207         /* Read the EEPROM */
9208         err = iwl4965_eeprom_init(priv);
9209         if (err) {
9210                 IWL_ERROR("Unable to init EEPROM\n");
9211                 goto out_remove_sysfs;
9212         }
9213         /* MAC Address location in EEPROM same for 3945/4965 */
9214         get_eeprom_mac(priv, priv->mac_addr);
9215         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
9216         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
9217
9218         err = iwl4965_init_channel_map(priv);
9219         if (err) {
9220                 IWL_ERROR("initializing regulatory failed: %d\n", err);
9221                 goto out_remove_sysfs;
9222         }
9223
9224         err = iwl4965_init_geos(priv);
9225         if (err) {
9226                 IWL_ERROR("initializing geos failed: %d\n", err);
9227                 goto out_free_channel_map;
9228         }
9229         iwl4965_reset_channel_flag(priv);
9230
9231         iwl4965_rate_control_register(priv->hw);
9232         err = ieee80211_register_hw(priv->hw);
9233         if (err) {
9234                 IWL_ERROR("Failed to register network device (error %d)\n", err);
9235                 goto out_free_geos;
9236         }
9237
9238         priv->hw->conf.beacon_int = 100;
9239         priv->mac80211_registered = 1;
9240         pci_save_state(pdev);
9241         pci_disable_device(pdev);
9242
9243         return 0;
9244
9245  out_free_geos:
9246         iwl4965_free_geos(priv);
9247  out_free_channel_map:
9248         iwl4965_free_channel_map(priv);
9249  out_remove_sysfs:
9250         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9251
9252  out_release_irq:
9253         destroy_workqueue(priv->workqueue);
9254         priv->workqueue = NULL;
9255         iwl4965_unset_hw_setting(priv);
9256
9257  out_iounmap:
9258         pci_iounmap(pdev, priv->hw_base);
9259  out_pci_release_regions:
9260         pci_release_regions(pdev);
9261  out_pci_disable_device:
9262         pci_disable_device(pdev);
9263         pci_set_drvdata(pdev, NULL);
9264  out_ieee80211_free_hw:
9265         ieee80211_free_hw(priv->hw);
9266  out:
9267         return err;
9268 }
9269
9270 static void iwl4965_pci_remove(struct pci_dev *pdev)
9271 {
9272         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9273         struct list_head *p, *q;
9274         int i;
9275
9276         if (!priv)
9277                 return;
9278
9279         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9280
9281         set_bit(STATUS_EXIT_PENDING, &priv->status);
9282
9283         iwl4965_down(priv);
9284
9285         /* Free MAC hash list for ADHOC */
9286         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9287                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9288                         list_del(p);
9289                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
9290                 }
9291         }
9292
9293         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9294
9295         iwl4965_dealloc_ucode_pci(priv);
9296
9297         if (priv->rxq.bd)
9298                 iwl4965_rx_queue_free(priv, &priv->rxq);
9299         iwl4965_hw_txq_ctx_free(priv);
9300
9301         iwl4965_unset_hw_setting(priv);
9302         iwl4965_clear_stations_table(priv);
9303
9304         if (priv->mac80211_registered) {
9305                 ieee80211_unregister_hw(priv->hw);
9306                 iwl4965_rate_control_unregister(priv->hw);
9307         }
9308
9309         /*netif_stop_queue(dev); */
9310         flush_workqueue(priv->workqueue);
9311
9312         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
9313          * priv->workqueue... so we can't take down the workqueue
9314          * until now... */
9315         destroy_workqueue(priv->workqueue);
9316         priv->workqueue = NULL;
9317
9318         pci_iounmap(pdev, priv->hw_base);
9319         pci_release_regions(pdev);
9320         pci_disable_device(pdev);
9321         pci_set_drvdata(pdev, NULL);
9322
9323         iwl4965_free_channel_map(priv);
9324         iwl4965_free_geos(priv);
9325
9326         if (priv->ibss_beacon)
9327                 dev_kfree_skb(priv->ibss_beacon);
9328
9329         ieee80211_free_hw(priv->hw);
9330 }
9331
9332 #ifdef CONFIG_PM
9333
9334 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9335 {
9336         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9337
9338         if (priv->is_open) {
9339                 set_bit(STATUS_IN_SUSPEND, &priv->status);
9340                 iwl4965_mac_stop(priv->hw);
9341                 priv->is_open = 1;
9342         }
9343
9344         pci_set_power_state(pdev, PCI_D3hot);
9345
9346         return 0;
9347 }
9348
9349 static int iwl4965_pci_resume(struct pci_dev *pdev)
9350 {
9351         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9352
9353         pci_set_power_state(pdev, PCI_D0);
9354
9355         if (priv->is_open)
9356                 iwl4965_mac_start(priv->hw);
9357
9358         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9359         return 0;
9360 }
9361
9362 #endif /* CONFIG_PM */
9363
9364 /*****************************************************************************
9365  *
9366  * driver and module entry point
9367  *
9368  *****************************************************************************/
9369
9370 static struct pci_driver iwl4965_driver = {
9371         .name = DRV_NAME,
9372         .id_table = iwl4965_hw_card_ids,
9373         .probe = iwl4965_pci_probe,
9374         .remove = __devexit_p(iwl4965_pci_remove),
9375 #ifdef CONFIG_PM
9376         .suspend = iwl4965_pci_suspend,
9377         .resume = iwl4965_pci_resume,
9378 #endif
9379 };
9380
9381 static int __init iwl4965_init(void)
9382 {
9383
9384         int ret;
9385         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9386         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9387         ret = pci_register_driver(&iwl4965_driver);
9388         if (ret) {
9389                 IWL_ERROR("Unable to initialize PCI module\n");
9390                 return ret;
9391         }
9392 #ifdef CONFIG_IWL4965_DEBUG
9393         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9394         if (ret) {
9395                 IWL_ERROR("Unable to create driver sysfs file\n");
9396                 pci_unregister_driver(&iwl4965_driver);
9397                 return ret;
9398         }
9399 #endif
9400
9401         return ret;
9402 }
9403
9404 static void __exit iwl4965_exit(void)
9405 {
9406 #ifdef CONFIG_IWL4965_DEBUG
9407         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9408 #endif
9409         pci_unregister_driver(&iwl4965_driver);
9410 }
9411
9412 module_param_named(antenna, iwl4965_param_antenna, int, 0444);
9413 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9414 module_param_named(disable, iwl4965_param_disable, int, 0444);
9415 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9416 module_param_named(hwcrypto, iwl4965_param_hwcrypto, int, 0444);
9417 MODULE_PARM_DESC(hwcrypto,
9418                  "using hardware crypto engine (default 0 [software])\n");
9419 module_param_named(debug, iwl4965_param_debug, int, 0444);
9420 MODULE_PARM_DESC(debug, "debug output mask");
9421 module_param_named(disable_hw_scan, iwl4965_param_disable_hw_scan, int, 0444);
9422 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9423
9424 module_param_named(queues_num, iwl4965_param_queues_num, int, 0444);
9425 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9426
9427 /* QoS */
9428 module_param_named(qos_enable, iwl4965_param_qos_enable, int, 0444);
9429 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9430 module_param_named(amsdu_size_8K, iwl4965_param_amsdu_size_8K, int, 0444);
9431 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
9432
9433 module_exit(iwl4965_exit);
9434 module_init(iwl4965_init);