Pileus Git - ~andy/linux/blob - drivers/net/wireless/ti/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 300                         wl1251_event_handle(wl, 0);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 305                         wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338         /*
 339          * Join command applies filters, and if we are not associated,
 340          * BSSID filter must be disabled for association to work.
 341          */
 342         if (is_zero_ether_addr(wl->bssid))
 343                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 344
 345         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 346                               dtim_period);
 347         if (ret < 0)
 348                 goto out;
 349
 350         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 351         if (ret < 0)
 352                 wl1251_warning("join timeout");
 353
 354 out:
 355         return ret;
 356 }
 357
 358 static void wl1251_op_tx(struct ieee80211_hw *hw,
 359                          struct ieee80211_tx_control *control,
 360                          struct sk_buff *skb)
 361 {
 362         struct wl1251 *wl = hw->priv;
 363         unsigned long flags;
 364
 365         skb_queue_tail(&wl->tx_queue, skb);
 366
 367         /*
 368          * The chip specific setup must run before the first TX packet -
 369          * before that, the tx_work will not be initialized!
 370          */
 371
 372         ieee80211_queue_work(wl->hw, &wl->tx_work);
 373
 374         /*
 375          * The workqueue is slow to process the tx_queue and we need stop
 376          * the queue here, otherwise the queue will get too long.
 377          */
 378         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 379                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 380
 381                 spin_lock_irqsave(&wl->wl_lock, flags);
 382                 ieee80211_stop_queues(wl->hw);
 383                 wl->tx_queue_stopped = true;
 384                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 385         }
 386 }
 387
 388 static int wl1251_op_start(struct ieee80211_hw *hw)
 389 {
 390         struct wl1251 *wl = hw->priv;
 391         struct wiphy *wiphy = hw->wiphy;
 392         int ret = 0;
 393
 394         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 395
 396         mutex_lock(&wl->mutex);
 397
 398         if (wl->state != WL1251_STATE_OFF) {
 399                 wl1251_error("cannot start because not in off state: %d",
 400                              wl->state);
 401                 ret = -EBUSY;
 402                 goto out;
 403         }
 404
 405         ret = wl1251_chip_wakeup(wl);
 406         if (ret < 0)
 407                 goto out;
 408
 409         ret = wl1251_boot(wl);
 410         if (ret < 0)
 411                 goto out;
 412
 413         ret = wl1251_hw_init(wl);
 414         if (ret < 0)
 415                 goto out;
 416
 417         ret = wl1251_acx_station_id(wl);
 418         if (ret < 0)
 419                 goto out;
 420
 421         wl->state = WL1251_STATE_ON;
 422
 423         wl1251_info("firmware booted (%s)", wl->fw_ver);
 424
 425         /* update hw/fw version info in wiphy struct */
 426         wiphy->hw_version = wl->chip_id;
 427         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 428
 429 out:
 430         if (ret < 0)
 431                 wl1251_power_off(wl);
 432
 433         mutex_unlock(&wl->mutex);
 434
 435         return ret;
 436 }
 437
 438 static void wl1251_op_stop(struct ieee80211_hw *hw)
 439 {
 440         struct wl1251 *wl = hw->priv;
 441
 442         wl1251_info("down");
 443
 444         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 445
 446         mutex_lock(&wl->mutex);
 447
 448         WARN_ON(wl->state != WL1251_STATE_ON);
 449
 450         if (wl->scanning) {
 451                 ieee80211_scan_completed(wl->hw, true);
 452                 wl->scanning = false;
 453         }
 454
 455         wl->state = WL1251_STATE_OFF;
 456
 457         wl1251_disable_interrupts(wl);
 458
 459         mutex_unlock(&wl->mutex);
 460
 461         cancel_work_sync(&wl->irq_work);
 462         cancel_work_sync(&wl->tx_work);
 463         cancel_delayed_work_sync(&wl->elp_work);
 464
 465         mutex_lock(&wl->mutex);
 466
 467         /* let's notify MAC80211 about the remaining pending TX frames */
 468         wl1251_tx_flush(wl);
 469         wl1251_power_off(wl);
 470
 471         memset(wl->bssid, 0, ETH_ALEN);
 472         wl->listen_int = 1;
 473         wl->bss_type = MAX_BSS_TYPE;
 474
 475         wl->data_in_count = 0;
 476         wl->rx_counter = 0;
 477         wl->rx_handled = 0;
 478         wl->rx_current_buffer = 0;
 479         wl->rx_last_id = 0;
 480         wl->next_tx_complete = 0;
 481         wl->elp = false;
 482         wl->station_mode = STATION_ACTIVE_MODE;
 483         wl->psm_entry_retry = 0;
 484         wl->tx_queue_stopped = false;
 485         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 486         wl->rssi_thold = 0;
 487         wl->channel = WL1251_DEFAULT_CHANNEL;
 488         wl->monitor_present = false;
 489         wl->joined = false;
 490
 491         wl1251_debugfs_reset(wl);
 492
 493         mutex_unlock(&wl->mutex);
 494 }
 495
 496 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 497                                    struct ieee80211_vif *vif)
 498 {
 499         struct wl1251 *wl = hw->priv;
 500         int ret = 0;
 501
 502         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 503                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 504
 505         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 506                      vif->type, vif->addr);
 507
 508         mutex_lock(&wl->mutex);
 509         if (wl->vif) {
 510                 ret = -EBUSY;
 511                 goto out;
 512         }
 513
 514         wl->vif = vif;
 515
 516         switch (vif->type) {
 517         case NL80211_IFTYPE_STATION:
 518                 wl->bss_type = BSS_TYPE_STA_BSS;
 519                 break;
 520         case NL80211_IFTYPE_ADHOC:
 521                 wl->bss_type = BSS_TYPE_IBSS;
 522                 break;
 523         default:
 524                 ret = -EOPNOTSUPP;
 525                 goto out;
 526         }
 527
 528         if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
 529                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 530                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 531                 ret = wl1251_acx_station_id(wl);
 532                 if (ret < 0)
 533                         goto out;
 534         }
 535
 536 out:
 537         mutex_unlock(&wl->mutex);
 538         return ret;
 539 }
 540
 541 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 542                                          struct ieee80211_vif *vif)
 543 {
 544         struct wl1251 *wl = hw->priv;
 545
 546         mutex_lock(&wl->mutex);
 547         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 548         wl->vif = NULL;
 549         memset(wl->bssid, 0, ETH_ALEN);
 550         mutex_unlock(&wl->mutex);
 551 }
 552
 553 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 554 {
 555         struct ieee80211_qos_hdr template;
 556
 557         memset(&template, 0, sizeof(template));
 558
 559         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 560         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 561         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 562
 563         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 564                                              IEEE80211_STYPE_QOS_NULLFUNC |
 565                                              IEEE80211_FCTL_TODS);
 566
 567         /* FIXME: not sure what priority to use here */
 568         template.qos_ctrl = cpu_to_le16(0);
 569
 570         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 571                                        sizeof(template));
 572 }
 573
 574 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 575 {
 576         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 577 }
 578
 579 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 580 {
 581         struct wl1251 *wl = hw->priv;
 582         struct ieee80211_conf *conf = &hw->conf;
 583         int channel, ret = 0;
 584
 585         channel = ieee80211_frequency_to_channel(
 586                         conf->chandef.chan->center_freq);
 587
 588         wl1251_debug(DEBUG_MAC80211,
 589                      "mac80211 config ch %d monitor %s psm %s power %d",
 590                      channel,
 591                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 592                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 593                      conf->power_level);
 594
 595         mutex_lock(&wl->mutex);
 596
 597         ret = wl1251_ps_elp_wakeup(wl);
 598         if (ret < 0)
 599                 goto out;
 600
 601         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 602                 u32 mode;
 603
 604                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 605                         wl->monitor_present = true;
 606                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 607                 } else {
 608                         wl->monitor_present = false;
 609                         mode = 0;
 610                 }
 611
 612                 ret = wl1251_acx_feature_cfg(wl, mode);
 613                 if (ret < 0)
 614                         goto out_sleep;
 615         }
 616
 617         if (channel != wl->channel) {
 618                 wl->channel = channel;
 619
 620                 /*
 621                  * Use ENABLE_RX command for channel switching when no
 622                  * interface is present (monitor mode only).
 623                  * This leaves the tx path disabled in firmware, whereas
 624                  * the usual JOIN command seems to transmit some frames
 625                  * at firmware level.
 626                  */
 627                 if (wl->vif == NULL) {
 628                         wl->joined = false;
 629                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 630                 } else {
 631                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 632                                           wl->beacon_int, wl->dtim_period);
 633                 }
 634                 if (ret < 0)
 635                         goto out_sleep;
 636         }
 637
 638         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 639                 wl1251_debug(DEBUG_PSM, "psm enabled");
 640
 641                 wl->psm_requested = true;
 642
 643                 wl->dtim_period = conf->ps_dtim_period;
 644
 645                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 646                                                   wl->dtim_period);
 647
 648                 /*
 649                  * mac80211 enables PSM only if we're already associated.
 650                  */
 651                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 652                 if (ret < 0)
 653                         goto out_sleep;
 654         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 655                 wl1251_debug(DEBUG_PSM, "psm disabled");
 656
 657                 wl->psm_requested = false;
 658
 659                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 660                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 661                         if (ret < 0)
 662                                 goto out_sleep;
 663                 }
 664         }
 665
 666         if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 667                 if (conf->flags & IEEE80211_CONF_IDLE) {
 668                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 669                         if (ret < 0)
 670                                 goto out_sleep;
 671                 } else {
 672                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 673                         if (ret < 0)
 674                                 goto out_sleep;
 675                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 676                                           wl->beacon_int, wl->dtim_period);
 677                         if (ret < 0)
 678                                 goto out_sleep;
 679                 }
 680         }
 681
 682         if (conf->power_level != wl->power_level) {
 683                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 684                 if (ret < 0)
 685                         goto out_sleep;
 686
 687                 wl->power_level = conf->power_level;
 688         }
 689
 690         /*
 691          * Tell stack that connection is lost because hw encryption isn't
 692          * supported in monitor mode.
 693          * This requires temporary enabling of the hw connection monitor flag
 694          */
 695         if ((changed & IEEE80211_CONF_CHANGE_MONITOR) && wl->vif) {
 696                 wl->hw->flags |= IEEE80211_HW_CONNECTION_MONITOR;
 697                 ieee80211_connection_loss(wl->vif);
 698         }
 699
 700 out_sleep:
 701         wl1251_ps_elp_sleep(wl);
 702
 703 out:
 704         mutex_unlock(&wl->mutex);
 705
 706         return ret;
 707 }
 708
 709 struct wl1251_filter_params {
 710         bool enabled;
 711         int mc_list_length;
 712         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 713 };
 714
 715 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 716                                        struct netdev_hw_addr_list *mc_list)
 717 {
 718         struct wl1251_filter_params *fp;
 719         struct netdev_hw_addr *ha;
 720         struct wl1251 *wl = hw->priv;
 721
 722         if (unlikely(wl->state == WL1251_STATE_OFF))
 723                 return 0;
 724
 725         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 726         if (!fp) {
 727                 wl1251_error("Out of memory setting filters.");
 728                 return 0;
 729         }
 730
 731         /* update multicast filtering parameters */
 732         fp->mc_list_length = 0;
 733         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 734                 fp->enabled = false;
 735         } else {
 736                 fp->enabled = true;
 737                 netdev_hw_addr_list_for_each(ha, mc_list) {
 738                         memcpy(fp->mc_list[fp->mc_list_length],
 739                                         ha->addr, ETH_ALEN);
 740                         fp->mc_list_length++;
 741                 }
 742         }
 743
 744         return (u64)(unsigned long)fp;
 745 }
 746
 747 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 748                                   FIF_ALLMULTI | \
 749                                   FIF_FCSFAIL | \
 750                                   FIF_BCN_PRBRESP_PROMISC | \
 751                                   FIF_CONTROL | \
 752                                   FIF_OTHER_BSS | \
 753                                   FIF_PROBE_REQ)
 754
 755 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 756                                        unsigned int changed,
 757                                        unsigned int *total, u64 multicast)
 758 {
 759         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 760         struct wl1251 *wl = hw->priv;
 761         int ret;
 762
 763         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 764
 765         *total &= WL1251_SUPPORTED_FILTERS;
 766         changed &= WL1251_SUPPORTED_FILTERS;
 767
 768         if (changed == 0) {
 769                 /* no filters which we support changed */
 770                 kfree(fp);
 771                 return;
 772         }
 773
 774         mutex_lock(&wl->mutex);
 775
 776         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 777         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 778
 779         if (*total & FIF_PROMISC_IN_BSS) {
 780                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 781                 wl->rx_config |= CFG_RX_ALL_GOOD;
 782         }
 783         if (*total & FIF_ALLMULTI)
 784                 /*
 785                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 786                  * all multicast frames
 787                  */
 788                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 789         if (*total & FIF_FCSFAIL)
 790                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 791         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 792                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 793                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 794         }
 795         if (*total & FIF_CONTROL)
 796                 wl->rx_filter |= CFG_RX_CTL_EN;
 797         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 798                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 799         if (*total & FIF_PROBE_REQ)
 800                 wl->rx_filter |= CFG_RX_PREQ_EN;
 801
 802         if (wl->state == WL1251_STATE_OFF)
 803                 goto out;
 804
 805         ret = wl1251_ps_elp_wakeup(wl);
 806         if (ret < 0)
 807                 goto out;
 808
 809         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 810                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 811         else if (fp)
 812                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 813                                                    fp->mc_list,
 814                                                    fp->mc_list_length);
 815         if (ret < 0)
 816                 goto out;
 817
 818         /* send filters to firmware */
 819         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 820
 821         wl1251_ps_elp_sleep(wl);
 822
 823 out:
 824         mutex_unlock(&wl->mutex);
 825         kfree(fp);
 826 }
 827
 828 /* HW encryption */
 829 static int wl1251_set_key_type(struct wl1251 *wl,
 830                                struct wl1251_cmd_set_keys *key,
 831                                enum set_key_cmd cmd,
 832                                struct ieee80211_key_conf *mac80211_key,
 833                                const u8 *addr)
 834 {
 835         switch (mac80211_key->cipher) {
 836         case WLAN_CIPHER_SUITE_WEP40:
 837         case WLAN_CIPHER_SUITE_WEP104:
 838                 if (is_broadcast_ether_addr(addr))
 839                         key->key_type = KEY_WEP_DEFAULT;
 840                 else
 841                         key->key_type = KEY_WEP_ADDR;
 842
 843                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 844                 break;
 845         case WLAN_CIPHER_SUITE_TKIP:
 846                 if (is_broadcast_ether_addr(addr))
 847                         key->key_type = KEY_TKIP_MIC_GROUP;
 848                 else
 849                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 850
 851                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 852                 break;
 853         case WLAN_CIPHER_SUITE_CCMP:
 854                 if (is_broadcast_ether_addr(addr))
 855                         key->key_type = KEY_AES_GROUP;
 856                 else
 857                         key->key_type = KEY_AES_PAIRWISE;
 858                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 859                 break;
 860         default:
 861                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 862                 return -EOPNOTSUPP;
 863         }
 864
 865         return 0;
 866 }
 867
 868 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 869                              struct ieee80211_vif *vif,
 870                              struct ieee80211_sta *sta,
 871                              struct ieee80211_key_conf *key)
 872 {
 873         struct wl1251 *wl = hw->priv;
 874         struct wl1251_cmd_set_keys *wl_cmd;
 875         const u8 *addr;
 876         int ret;
 877
 878         static const u8 bcast_addr[ETH_ALEN] =
 879                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 880
 881         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 882
 883         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 884         if (!wl_cmd) {
 885                 ret = -ENOMEM;
 886                 goto out;
 887         }
 888
 889         addr = sta ? sta->addr : bcast_addr;
 890
 891         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 892         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 893         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 894                      key->cipher, key->keyidx, key->keylen, key->flags);
 895         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 896
 897         if (is_zero_ether_addr(addr)) {
 898                 /* We dont support TX only encryption */
 899                 ret = -EOPNOTSUPP;
 900                 goto out;
 901         }
 902
 903         mutex_lock(&wl->mutex);
 904
 905         switch (cmd) {
 906         case SET_KEY:
 907                 if (wl->monitor_present) {
 908                         ret = -EOPNOTSUPP;
 909                         goto out_unlock;
 910                 }
 911                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 912                 break;
 913         case DISABLE_KEY:
 914                 wl_cmd->key_action = KEY_REMOVE;
 915                 break;
 916         default:
 917                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 918                 break;
 919         }
 920
 921         ret = wl1251_ps_elp_wakeup(wl);
 922         if (ret < 0)
 923                 goto out_unlock;
 924
 925         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 926         if (ret < 0) {
 927                 wl1251_error("Set KEY type failed");
 928                 goto out_sleep;
 929         }
 930
 931         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 932                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 933
 934         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 935             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 936                 /*
 937                  * We get the key in the following form:
 938                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 939                  * but the target is expecting:
 940                  * TKIP - RX MIC - TX MIC
 941                  */
 942                 memcpy(wl_cmd->key, key->key, 16);
 943                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 944                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 945
 946         } else {
 947                 memcpy(wl_cmd->key, key->key, key->keylen);
 948         }
 949         wl_cmd->key_size = key->keylen;
 950
 951         wl_cmd->id = key->keyidx;
 952         wl_cmd->ssid_profile = 0;
 953
 954         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 955
 956         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 957         if (ret < 0) {
 958                 wl1251_warning("could not set keys");
 959                 goto out_sleep;
 960         }
 961
 962 out_sleep:
 963         wl1251_ps_elp_sleep(wl);
 964
 965 out_unlock:
 966         mutex_unlock(&wl->mutex);
 967
 968 out:
 969         kfree(wl_cmd);
 970
 971         return ret;
 972 }
 973
 974 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 975                              struct ieee80211_vif *vif,
 976                              struct cfg80211_scan_request *req)
 977 {
 978         struct wl1251 *wl = hw->priv;
 979         struct sk_buff *skb;
 980         size_t ssid_len = 0;
 981         u8 *ssid = NULL;
 982         int ret;
 983
 984         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 985
 986         if (req->n_ssids) {
 987                 ssid = req->ssids[0].ssid;
 988                 ssid_len = req->ssids[0].ssid_len;
 989         }
 990
 991         mutex_lock(&wl->mutex);
 992
 993         if (wl->scanning) {
 994                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 995                 ret = -EINVAL;
 996                 goto out;
 997         }
 998
 999         ret = wl1251_ps_elp_wakeup(wl);
1000         if (ret < 0)
1001                 goto out;
1002
1003         if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1004                 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1005                 if (ret < 0)
1006                         goto out_sleep;
1007                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1008                                   wl->beacon_int, wl->dtim_period);
1009                 if (ret < 0)
1010                         goto out_sleep;
1011         }
1012
1013         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1014                                      req->ie_len);
1015         if (!skb) {
1016                 ret = -ENOMEM;
1017                 goto out_idle;
1018         }
1019         if (req->ie_len)
1020                 memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len);
1021
1022         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1023                                       skb->len);
1024         dev_kfree_skb(skb);
1025         if (ret < 0)
1026                 goto out_idle;
1027
1028         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1029         if (ret < 0)
1030                 goto out_idle;
1031
1032         wl->scanning = true;
1033
1034         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1035                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1036         if (ret < 0) {
1037                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1038                 wl->scanning = false;
1039                 goto out_idle;
1040         }
1041         goto out_sleep;
1042
1043 out_idle:
1044         if (hw->conf.flags & IEEE80211_CONF_IDLE)
1045                 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1046 out_sleep:
1047         wl1251_ps_elp_sleep(wl);
1048
1049 out:
1050         mutex_unlock(&wl->mutex);
1051
1052         return ret;
1053 }
1054
1055 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1056 {
1057         struct wl1251 *wl = hw->priv;
1058         int ret;
1059
1060         mutex_lock(&wl->mutex);
1061
1062         ret = wl1251_ps_elp_wakeup(wl);
1063         if (ret < 0)
1064                 goto out;
1065
1066         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1067         if (ret < 0)
1068                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1069
1070         wl1251_ps_elp_sleep(wl);
1071
1072 out:
1073         mutex_unlock(&wl->mutex);
1074
1075         return ret;
1076 }
1077
1078 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1079                                        struct ieee80211_vif *vif,
1080                                        struct ieee80211_bss_conf *bss_conf,
1081                                        u32 changed)
1082 {
1083         struct wl1251 *wl = hw->priv;
1084         struct sk_buff *beacon, *skb;
1085         bool enable;
1086         int ret;
1087
1088         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1089
1090         mutex_lock(&wl->mutex);
1091
1092         ret = wl1251_ps_elp_wakeup(wl);
1093         if (ret < 0)
1094                 goto out;
1095
1096         if (changed & BSS_CHANGED_CQM) {
1097                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1098                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1099                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1100                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1101                 if (ret < 0)
1102                         goto out;
1103                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1104         }
1105
1106         if (changed & BSS_CHANGED_BSSID) {
1107                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1108
1109                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1110                 if (!skb)
1111                         goto out_sleep;
1112
1113                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1114                                               skb->data, skb->len);
1115                 dev_kfree_skb(skb);
1116                 if (ret < 0)
1117                         goto out_sleep;
1118
1119                 ret = wl1251_build_qos_null_data(wl);
1120                 if (ret < 0)
1121                         goto out;
1122
1123                 if (wl->bss_type != BSS_TYPE_IBSS) {
1124                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1125                                           wl->beacon_int, wl->dtim_period);
1126                         if (ret < 0)
1127                                 goto out_sleep;
1128                 }
1129         }
1130
1131         if (changed & BSS_CHANGED_ASSOC) {
1132                 /* Disable temporary enabled hw connection monitor flag */
1133                 wl->hw->flags &= ~IEEE80211_HW_CONNECTION_MONITOR;
1134
1135                 if (bss_conf->assoc) {
1136                         wl->beacon_int = bss_conf->beacon_int;
1137
1138                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1139                         if (!skb)
1140                                 goto out_sleep;
1141
1142                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1143                                                       skb->data,
1144                                                       skb->len);
1145                         dev_kfree_skb(skb);
1146                         if (ret < 0)
1147                                 goto out_sleep;
1148
1149                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1150                         if (ret < 0)
1151                                 goto out_sleep;
1152                 } else {
1153                         /* use defaults when not associated */
1154                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1155                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1156                 }
1157         }
1158         if (changed & BSS_CHANGED_ERP_SLOT) {
1159                 if (bss_conf->use_short_slot)
1160                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1161                 else
1162                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1163                 if (ret < 0) {
1164                         wl1251_warning("Set slot time failed %d", ret);
1165                         goto out_sleep;
1166                 }
1167         }
1168
1169         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1170                 if (bss_conf->use_short_preamble)
1171                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1172                 else
1173                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1174         }
1175
1176         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1177                 if (bss_conf->use_cts_prot)
1178                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1179                 else
1180                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1181                 if (ret < 0) {
1182                         wl1251_warning("Set ctsprotect failed %d", ret);
1183                         goto out_sleep;
1184                 }
1185         }
1186
1187         if (changed & BSS_CHANGED_ARP_FILTER) {
1188                 __be32 addr = bss_conf->arp_addr_list[0];
1189                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1190
1191                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1192                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1193
1194                 if (ret < 0)
1195                         goto out_sleep;
1196         }
1197
1198         if (changed & BSS_CHANGED_BEACON) {
1199                 beacon = ieee80211_beacon_get(hw, vif);
1200                 if (!beacon)
1201                         goto out_sleep;
1202
1203                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1204                                               beacon->len);
1205
1206                 if (ret < 0) {
1207                         dev_kfree_skb(beacon);
1208                         goto out_sleep;
1209                 }
1210
1211                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1212                                               beacon->len);
1213
1214                 dev_kfree_skb(beacon);
1215
1216                 if (ret < 0)
1217                         goto out_sleep;
1218
1219                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1220                                   wl->channel, wl->dtim_period);
1221
1222                 if (ret < 0)
1223                         goto out_sleep;
1224         }
1225
1226 out_sleep:
1227         wl1251_ps_elp_sleep(wl);
1228
1229 out:
1230         mutex_unlock(&wl->mutex);
1231 }
1232
1233
1234 /* can't be const, mac80211 writes to this */
1235 static struct ieee80211_rate wl1251_rates[] = {
1236         { .bitrate = 10,
1237           .hw_value = 0x1,
1238           .hw_value_short = 0x1, },
1239         { .bitrate = 20,
1240           .hw_value = 0x2,
1241           .hw_value_short = 0x2,
1242           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1243         { .bitrate = 55,
1244           .hw_value = 0x4,
1245           .hw_value_short = 0x4,
1246           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1247         { .bitrate = 110,
1248           .hw_value = 0x20,
1249           .hw_value_short = 0x20,
1250           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1251         { .bitrate = 60,
1252           .hw_value = 0x8,
1253           .hw_value_short = 0x8, },
1254         { .bitrate = 90,
1255           .hw_value = 0x10,
1256           .hw_value_short = 0x10, },
1257         { .bitrate = 120,
1258           .hw_value = 0x40,
1259           .hw_value_short = 0x40, },
1260         { .bitrate = 180,
1261           .hw_value = 0x80,
1262           .hw_value_short = 0x80, },
1263         { .bitrate = 240,
1264           .hw_value = 0x200,
1265           .hw_value_short = 0x200, },
1266         { .bitrate = 360,
1267          .hw_value = 0x400,
1268          .hw_value_short = 0x400, },
1269         { .bitrate = 480,
1270           .hw_value = 0x800,
1271           .hw_value_short = 0x800, },
1272         { .bitrate = 540,
1273           .hw_value = 0x1000,
1274           .hw_value_short = 0x1000, },
1275 };
1276
1277 /* can't be const, mac80211 writes to this */
1278 static struct ieee80211_channel wl1251_channels[] = {
1279         { .hw_value = 1, .center_freq = 2412},
1280         { .hw_value = 2, .center_freq = 2417},
1281         { .hw_value = 3, .center_freq = 2422},
1282         { .hw_value = 4, .center_freq = 2427},
1283         { .hw_value = 5, .center_freq = 2432},
1284         { .hw_value = 6, .center_freq = 2437},
1285         { .hw_value = 7, .center_freq = 2442},
1286         { .hw_value = 8, .center_freq = 2447},
1287         { .hw_value = 9, .center_freq = 2452},
1288         { .hw_value = 10, .center_freq = 2457},
1289         { .hw_value = 11, .center_freq = 2462},
1290         { .hw_value = 12, .center_freq = 2467},
1291         { .hw_value = 13, .center_freq = 2472},
1292 };
1293
1294 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1295                              struct ieee80211_vif *vif, u16 queue,
1296                              const struct ieee80211_tx_queue_params *params)
1297 {
1298         enum wl1251_acx_ps_scheme ps_scheme;
1299         struct wl1251 *wl = hw->priv;
1300         int ret;
1301
1302         mutex_lock(&wl->mutex);
1303
1304         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1305
1306         ret = wl1251_ps_elp_wakeup(wl);
1307         if (ret < 0)
1308                 goto out;
1309
1310         /* mac80211 uses units of 32 usec */
1311         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1312                                 params->cw_min, params->cw_max,
1313                                 params->aifs, params->txop * 32);
1314         if (ret < 0)
1315                 goto out_sleep;
1316
1317         if (params->uapsd)
1318                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1319         else
1320                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1321
1322         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1323                                  CHANNEL_TYPE_EDCF,
1324                                  wl1251_tx_get_queue(queue), ps_scheme,
1325                                  WL1251_ACX_ACK_POLICY_LEGACY);
1326         if (ret < 0)
1327                 goto out_sleep;
1328
1329 out_sleep:
1330         wl1251_ps_elp_sleep(wl);
1331
1332 out:
1333         mutex_unlock(&wl->mutex);
1334
1335         return ret;
1336 }
1337
1338 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1339                                 struct survey_info *survey)
1340 {
1341         struct wl1251 *wl = hw->priv;
1342         struct ieee80211_conf *conf = &hw->conf;
1343
1344         if (idx != 0)
1345                 return -ENOENT;
1346
1347         survey->channel = conf->chandef.chan;
1348         survey->filled = SURVEY_INFO_NOISE_DBM;
1349         survey->noise = wl->noise;
1350
1351         return 0;
1352 }
1353
1354 /* can't be const, mac80211 writes to this */
1355 static struct ieee80211_supported_band wl1251_band_2ghz = {
1356         .channels = wl1251_channels,
1357         .n_channels = ARRAY_SIZE(wl1251_channels),
1358         .bitrates = wl1251_rates,
1359         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1360 };
1361
1362 static const struct ieee80211_ops wl1251_ops = {
1363         .start = wl1251_op_start,
1364         .stop = wl1251_op_stop,
1365         .add_interface = wl1251_op_add_interface,
1366         .remove_interface = wl1251_op_remove_interface,
1367         .config = wl1251_op_config,
1368         .prepare_multicast = wl1251_op_prepare_multicast,
1369         .configure_filter = wl1251_op_configure_filter,
1370         .tx = wl1251_op_tx,
1371         .set_key = wl1251_op_set_key,
1372         .hw_scan = wl1251_op_hw_scan,
1373         .bss_info_changed = wl1251_op_bss_info_changed,
1374         .set_rts_threshold = wl1251_op_set_rts_threshold,
1375         .conf_tx = wl1251_op_conf_tx,
1376         .get_survey = wl1251_op_get_survey,
1377 };
1378
1379 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1380 {
1381         unsigned long timeout;
1382
1383         wl1251_reg_write32(wl, EE_ADDR, offset);
1384         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1385
1386         /* EE_CTL_READ clears when data is ready */
1387         timeout = jiffies + msecs_to_jiffies(100);
1388         while (1) {
1389                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1390                         break;
1391
1392                 if (time_after(jiffies, timeout))
1393                         return -ETIMEDOUT;
1394
1395                 msleep(1);
1396         }
1397
1398         *data = wl1251_reg_read32(wl, EE_DATA);
1399         return 0;
1400 }
1401
1402 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1403                               u8 *data, size_t len)
1404 {
1405         size_t i;
1406         int ret;
1407
1408         wl1251_reg_write32(wl, EE_START, 0);
1409
1410         for (i = 0; i < len; i++) {
1411                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1412                 if (ret < 0)
1413                         return ret;
1414         }
1415
1416         return 0;
1417 }
1418
1419 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1420 {
1421         u8 mac[ETH_ALEN];
1422         int i, ret;
1423
1424         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1425
1426         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1427         if (ret < 0) {
1428                 wl1251_warning("failed to read MAC address from EEPROM");
1429                 return ret;
1430         }
1431
1432         /* MAC is stored in reverse order */
1433         for (i = 0; i < ETH_ALEN; i++)
1434                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1435
1436         return 0;
1437 }
1438
1439 static int wl1251_register_hw(struct wl1251 *wl)
1440 {
1441         int ret;
1442
1443         if (wl->mac80211_registered)
1444                 return 0;
1445
1446         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1447
1448         ret = ieee80211_register_hw(wl->hw);
1449         if (ret < 0) {
1450                 wl1251_error("unable to register mac80211 hw: %d", ret);
1451                 return ret;
1452         }
1453
1454         wl->mac80211_registered = true;
1455
1456         wl1251_notice("loaded");
1457
1458         return 0;
1459 }
1460
1461 int wl1251_init_ieee80211(struct wl1251 *wl)
1462 {
1463         int ret;
1464
1465         /* The tx descriptor buffer and the TKIP space */
1466         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1467                 + WL1251_TKIP_IV_SPACE;
1468
1469         /* unit us */
1470         /* FIXME: find a proper value */
1471         wl->hw->channel_change_time = 10000;
1472
1473         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1474                 IEEE80211_HW_SUPPORTS_PS |
1475                 IEEE80211_HW_SUPPORTS_UAPSD;
1476
1477         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1478                                          BIT(NL80211_IFTYPE_ADHOC);
1479         wl->hw->wiphy->max_scan_ssids = 1;
1480         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1481
1482         wl->hw->queues = 4;
1483
1484         if (wl->use_eeprom)
1485                 wl1251_read_eeprom_mac(wl);
1486
1487         ret = wl1251_register_hw(wl);
1488         if (ret)
1489                 goto out;
1490
1491         wl1251_debugfs_init(wl);
1492         wl1251_notice("initialized");
1493
1494         ret = 0;
1495
1496 out:
1497         return ret;
1498 }
1499 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1500
1501 struct ieee80211_hw *wl1251_alloc_hw(void)
1502 {
1503         struct ieee80211_hw *hw;
1504         struct wl1251 *wl;
1505         int i;
1506         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1507
1508         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1509         if (!hw) {
1510                 wl1251_error("could not alloc ieee80211_hw");
1511                 return ERR_PTR(-ENOMEM);
1512         }
1513
1514         wl = hw->priv;
1515         memset(wl, 0, sizeof(*wl));
1516
1517         wl->hw = hw;
1518
1519         wl->data_in_count = 0;
1520
1521         skb_queue_head_init(&wl->tx_queue);
1522
1523         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1524         wl->channel = WL1251_DEFAULT_CHANNEL;
1525         wl->monitor_present = false;
1526         wl->joined = false;
1527         wl->scanning = false;
1528         wl->bss_type = MAX_BSS_TYPE;
1529         wl->default_key = 0;
1530         wl->listen_int = 1;
1531         wl->rx_counter = 0;
1532         wl->rx_handled = 0;
1533         wl->rx_current_buffer = 0;
1534         wl->rx_last_id = 0;
1535         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1536         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1537         wl->elp = false;
1538         wl->station_mode = STATION_ACTIVE_MODE;
1539         wl->psm_requested = false;
1540         wl->psm_entry_retry = 0;
1541         wl->tx_queue_stopped = false;
1542         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1543         wl->rssi_thold = 0;
1544         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1545         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1546         wl->vif = NULL;
1547
1548         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1549                 wl->tx_frames[i] = NULL;
1550
1551         wl->next_tx_complete = 0;
1552
1553         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1554         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1555
1556         /*
1557          * In case our MAC address is not correctly set,
1558          * we use a random but Nokia MAC.
1559          */
1560         memcpy(wl->mac_addr, nokia_oui, 3);
1561         get_random_bytes(wl->mac_addr + 3, 3);
1562
1563         wl->state = WL1251_STATE_OFF;
1564         mutex_init(&wl->mutex);
1565
1566         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1567         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1568
1569         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1570         if (!wl->rx_descriptor) {
1571                 wl1251_error("could not allocate memory for rx descriptor");
1572                 ieee80211_free_hw(hw);
1573                 return ERR_PTR(-ENOMEM);
1574         }
1575
1576         return hw;
1577 }
1578 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1579
1580 int wl1251_free_hw(struct wl1251 *wl)
1581 {
1582         ieee80211_unregister_hw(wl->hw);
1583
1584         wl1251_debugfs_exit(wl);
1585
1586         kfree(wl->target_mem_map);
1587         kfree(wl->data_path);
1588         vfree(wl->fw);
1589         wl->fw = NULL;
1590         kfree(wl->nvs);
1591         wl->nvs = NULL;
1592
1593         kfree(wl->rx_descriptor);
1594         wl->rx_descriptor = NULL;
1595
1596         ieee80211_free_hw(wl->hw);
1597
1598         return 0;
1599 }
1600 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1601
1602 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1603 MODULE_LICENSE("GPL");
1604 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1605 MODULE_FIRMWARE(WL1251_FW_NAME);
1606 MODULE_FIRMWARE(WL1251_NVS_NAME);