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