drivers/net/wireless/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 void wl1251_power_off(struct wl1251 *wl)
  56 {
  57         wl->set_power(false);
  58 }
  59
  60 static void wl1251_power_on(struct wl1251 *wl)
  61 {
  62         wl->set_power(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 = 0;
 156
 157         wl1251_power_on(wl);
 158         msleep(WL1251_POWER_ON_SLEEP);
 159         wl->if_ops->reset(wl);
 160
 161         /* We don't need a real memory partition here, because we only want
 162          * to use the registers at this point. */
 163         wl1251_set_partition(wl,
 164                              0x00000000,
 165                              0x00000000,
 166                              REGISTERS_BASE,
 167                              REGISTERS_DOWN_SIZE);
 168
 169         /* ELP module wake up */
 170         wl1251_fw_wakeup(wl);
 171
 172         /* whal_FwCtrl_BootSm() */
 173
 174         /* 0. read chip id from CHIP_ID */
 175         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 176
 177         /* 1. check if chip id is valid */
 178
 179         switch (wl->chip_id) {
 180         case CHIP_ID_1251_PG12:
 181                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 182                              wl->chip_id);
 183                 break;
 184         case CHIP_ID_1251_PG11:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG10:
 189         default:
 190                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 191                 ret = -ENODEV;
 192                 goto out;
 193         }
 194
 195         if (wl->fw == NULL) {
 196                 ret = wl1251_fetch_firmware(wl);
 197                 if (ret < 0)
 198                         goto out;
 199         }
 200
 201         if (wl->nvs == NULL && !wl->use_eeprom) {
 202                 /* No NVS from netlink, try to get it from the filesystem */
 203                 ret = wl1251_fetch_nvs(wl);
 204                 if (ret < 0)
 205                         goto out;
 206         }
 207
 208 out:
 209         return ret;
 210 }
 211
 212 #define WL1251_IRQ_LOOP_COUNT 10
 213 static void wl1251_irq_work(struct work_struct *work)
 214 {
 215         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 216         struct wl1251 *wl =
 217                 container_of(work, struct wl1251, irq_work);
 218         int ret;
 219
 220         mutex_lock(&wl->mutex);
 221
 222         wl1251_debug(DEBUG_IRQ, "IRQ work");
 223
 224         if (wl->state == WL1251_STATE_OFF)
 225                 goto out;
 226
 227         ret = wl1251_ps_elp_wakeup(wl);
 228         if (ret < 0)
 229                 goto out;
 230
 231         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 232
 233         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 234         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 235
 236         do {
 237                 if (wl->data_path) {
 238                         wl->rx_counter = wl1251_mem_read32(
 239                                 wl, wl->data_path->rx_control_addr);
 240
 241                         /* We handle a frmware bug here */
 242                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 243                         case 0:
 244                                 wl1251_debug(DEBUG_IRQ,
 245                                              "RX: FW and host in sync");
 246                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 247                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 248                                 break;
 249                         case 1:
 250                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 251                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 252                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 253                                 break;
 254                         case 2:
 255                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 256                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 257                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 258                                 break;
 259                         default:
 260                                 wl1251_warning(
 261                                         "RX: FW and host out of sync: %d",
 262                                         wl->rx_counter - wl->rx_handled);
 263                                 break;
 264                         }
 265
 266                         wl->rx_handled = wl->rx_counter;
 267
 268                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 269                                      wl->rx_counter);
 270                 }
 271
 272                 intr &= wl->intr_mask;
 273
 274                 if (intr == 0) {
 275                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 276                         goto out_sleep;
 277                 }
 278
 279                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 280                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 281                         wl1251_rx(wl);
 282                 }
 283
 284                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 285                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 286                         wl1251_rx(wl);
 287                 }
 288
 289                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 290                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 291                         wl1251_tx_complete(wl);
 292                 }
 293
 294                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 295                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 296                         wl1251_event_handle(wl, 0);
 297                 }
 298
 299                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 300                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 301                         wl1251_event_handle(wl, 1);
 302                 }
 303
 304                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 305                         wl1251_debug(DEBUG_IRQ,
 306                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 307
 308                 if (--ctr == 0)
 309                         break;
 310
 311                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 312         } while (intr);
 313
 314 out_sleep:
 315         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 316         wl1251_ps_elp_sleep(wl);
 317
 318 out:
 319         mutex_unlock(&wl->mutex);
 320 }
 321
 322 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 323                        u16 beacon_interval, u8 dtim_period)
 324 {
 325         int ret;
 326
 327         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 328                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 329                                      wl->tx_mgmt_frm_rate,
 330                                      wl->tx_mgmt_frm_mod);
 331         if (ret < 0)
 332                 goto out;
 333
 334
 335         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 336                               dtim_period);
 337         if (ret < 0)
 338                 goto out;
 339
 340         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 341         if (ret < 0)
 342                 wl1251_warning("join timeout");
 343
 344 out:
 345         return ret;
 346 }
 347
 348 static void wl1251_filter_work(struct work_struct *work)
 349 {
 350         struct wl1251 *wl =
 351                 container_of(work, struct wl1251, filter_work);
 352         int ret;
 353
 354         mutex_lock(&wl->mutex);
 355
 356         if (wl->state == WL1251_STATE_OFF)
 357                 goto out;
 358
 359         ret = wl1251_ps_elp_wakeup(wl);
 360         if (ret < 0)
 361                 goto out;
 362
 363         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 364                           wl->dtim_period);
 365         if (ret < 0)
 366                 goto out_sleep;
 367
 368 out_sleep:
 369         wl1251_ps_elp_sleep(wl);
 370
 371 out:
 372         mutex_unlock(&wl->mutex);
 373 }
 374
 375 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 376 {
 377         struct wl1251 *wl = hw->priv;
 378         unsigned long flags;
 379
 380         skb_queue_tail(&wl->tx_queue, skb);
 381
 382         /*
 383          * The chip specific setup must run before the first TX packet -
 384          * before that, the tx_work will not be initialized!
 385          */
 386
 387         ieee80211_queue_work(wl->hw, &wl->tx_work);
 388
 389         /*
 390          * The workqueue is slow to process the tx_queue and we need stop
 391          * the queue here, otherwise the queue will get too long.
 392          */
 393         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 394                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 395
 396                 spin_lock_irqsave(&wl->wl_lock, flags);
 397                 ieee80211_stop_queues(wl->hw);
 398                 wl->tx_queue_stopped = true;
 399                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 400         }
 401
 402         return NETDEV_TX_OK;
 403 }
 404
 405 static int wl1251_op_start(struct ieee80211_hw *hw)
 406 {
 407         struct wl1251 *wl = hw->priv;
 408         struct wiphy *wiphy = hw->wiphy;
 409         int ret = 0;
 410
 411         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 412
 413         mutex_lock(&wl->mutex);
 414
 415         if (wl->state != WL1251_STATE_OFF) {
 416                 wl1251_error("cannot start because not in off state: %d",
 417                              wl->state);
 418                 ret = -EBUSY;
 419                 goto out;
 420         }
 421
 422         ret = wl1251_chip_wakeup(wl);
 423         if (ret < 0)
 424                 goto out;
 425
 426         ret = wl1251_boot(wl);
 427         if (ret < 0)
 428                 goto out;
 429
 430         ret = wl1251_hw_init(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         ret = wl1251_acx_station_id(wl);
 435         if (ret < 0)
 436                 goto out;
 437
 438         wl->state = WL1251_STATE_ON;
 439
 440         wl1251_info("firmware booted (%s)", wl->fw_ver);
 441
 442         /* update hw/fw version info in wiphy struct */
 443         wiphy->hw_version = wl->chip_id;
 444         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 445
 446 out:
 447         if (ret < 0)
 448                 wl1251_power_off(wl);
 449
 450         mutex_unlock(&wl->mutex);
 451
 452         return ret;
 453 }
 454
 455 static void wl1251_op_stop(struct ieee80211_hw *hw)
 456 {
 457         struct wl1251 *wl = hw->priv;
 458
 459         wl1251_info("down");
 460
 461         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 462
 463         mutex_lock(&wl->mutex);
 464
 465         WARN_ON(wl->state != WL1251_STATE_ON);
 466
 467         if (wl->scanning) {
 468                 ieee80211_scan_completed(wl->hw, true);
 469                 wl->scanning = false;
 470         }
 471
 472         wl->state = WL1251_STATE_OFF;
 473
 474         wl1251_disable_interrupts(wl);
 475
 476         mutex_unlock(&wl->mutex);
 477
 478         cancel_work_sync(&wl->irq_work);
 479         cancel_work_sync(&wl->tx_work);
 480         cancel_work_sync(&wl->filter_work);
 481
 482         mutex_lock(&wl->mutex);
 483
 484         /* let's notify MAC80211 about the remaining pending TX frames */
 485         wl1251_tx_flush(wl);
 486         wl1251_power_off(wl);
 487
 488         memset(wl->bssid, 0, ETH_ALEN);
 489         wl->listen_int = 1;
 490         wl->bss_type = MAX_BSS_TYPE;
 491
 492         wl->data_in_count = 0;
 493         wl->rx_counter = 0;
 494         wl->rx_handled = 0;
 495         wl->rx_current_buffer = 0;
 496         wl->rx_last_id = 0;
 497         wl->next_tx_complete = 0;
 498         wl->elp = false;
 499         wl->psm = 0;
 500         wl->tx_queue_stopped = false;
 501         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 502         wl->channel = WL1251_DEFAULT_CHANNEL;
 503
 504         wl1251_debugfs_reset(wl);
 505
 506         mutex_unlock(&wl->mutex);
 507 }
 508
 509 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 510                                    struct ieee80211_vif *vif)
 511 {
 512         struct wl1251 *wl = hw->priv;
 513         int ret = 0;
 514
 515         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 516                      vif->type, vif->addr);
 517
 518         mutex_lock(&wl->mutex);
 519         if (wl->vif) {
 520                 ret = -EBUSY;
 521                 goto out;
 522         }
 523
 524         wl->vif = vif;
 525
 526         switch (vif->type) {
 527         case NL80211_IFTYPE_STATION:
 528                 wl->bss_type = BSS_TYPE_STA_BSS;
 529                 break;
 530         case NL80211_IFTYPE_ADHOC:
 531                 wl->bss_type = BSS_TYPE_IBSS;
 532                 break;
 533         default:
 534                 ret = -EOPNOTSUPP;
 535                 goto out;
 536         }
 537
 538         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 539                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 540                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 541                 ret = wl1251_acx_station_id(wl);
 542                 if (ret < 0)
 543                         goto out;
 544         }
 545
 546 out:
 547         mutex_unlock(&wl->mutex);
 548         return ret;
 549 }
 550
 551 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 552                                          struct ieee80211_vif *vif)
 553 {
 554         struct wl1251 *wl = hw->priv;
 555
 556         mutex_lock(&wl->mutex);
 557         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 558         wl->vif = NULL;
 559         mutex_unlock(&wl->mutex);
 560 }
 561
 562 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 563 {
 564         struct ieee80211_qos_hdr template;
 565
 566         memset(&template, 0, sizeof(template));
 567
 568         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 569         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 570         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 571
 572         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 573                                              IEEE80211_STYPE_QOS_NULLFUNC |
 574                                              IEEE80211_FCTL_TODS);
 575
 576         /* FIXME: not sure what priority to use here */
 577         template.qos_ctrl = cpu_to_le16(0);
 578
 579         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 580                                        sizeof(template));
 581 }
 582
 583 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 584 {
 585         struct wl1251 *wl = hw->priv;
 586         struct ieee80211_conf *conf = &hw->conf;
 587         int channel, ret = 0;
 588
 589         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 590
 591         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 592                      channel,
 593                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 594                      conf->power_level);
 595
 596         mutex_lock(&wl->mutex);
 597
 598         ret = wl1251_ps_elp_wakeup(wl);
 599         if (ret < 0)
 600                 goto out;
 601
 602         if (channel != wl->channel) {
 603                 wl->channel = channel;
 604
 605                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 606                                   wl->beacon_int, wl->dtim_period);
 607                 if (ret < 0)
 608                         goto out_sleep;
 609         }
 610
 611         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 612                 wl1251_debug(DEBUG_PSM, "psm enabled");
 613
 614                 wl->psm_requested = true;
 615
 616                 wl->dtim_period = conf->ps_dtim_period;
 617
 618                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 619                                                   wl->dtim_period);
 620
 621                 /*
 622                  * mac80211 enables PSM only if we're already associated.
 623                  */
 624                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 625                 if (ret < 0)
 626                         goto out_sleep;
 627         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 628                    wl->psm_requested) {
 629                 wl1251_debug(DEBUG_PSM, "psm disabled");
 630
 631                 wl->psm_requested = false;
 632
 633                 if (wl->psm) {
 634                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 635                         if (ret < 0)
 636                                 goto out_sleep;
 637                 }
 638         }
 639
 640         if (conf->power_level != wl->power_level) {
 641                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 642                 if (ret < 0)
 643                         goto out_sleep;
 644
 645                 wl->power_level = conf->power_level;
 646         }
 647
 648 out_sleep:
 649         wl1251_ps_elp_sleep(wl);
 650
 651 out:
 652         mutex_unlock(&wl->mutex);
 653
 654         return ret;
 655 }
 656
 657 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 658                                   FIF_ALLMULTI | \
 659                                   FIF_FCSFAIL | \
 660                                   FIF_BCN_PRBRESP_PROMISC | \
 661                                   FIF_CONTROL | \
 662                                   FIF_OTHER_BSS)
 663
 664 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 665                                        unsigned int changed,
 666                                        unsigned int *total,u64 multicast)
 667 {
 668         struct wl1251 *wl = hw->priv;
 669
 670         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 671
 672         *total &= WL1251_SUPPORTED_FILTERS;
 673         changed &= WL1251_SUPPORTED_FILTERS;
 674
 675         if (changed == 0)
 676                 /* no filters which we support changed */
 677                 return;
 678
 679         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 680
 681         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 682         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 683
 684         if (*total & FIF_PROMISC_IN_BSS) {
 685                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 686                 wl->rx_config |= CFG_RX_ALL_GOOD;
 687         }
 688         if (*total & FIF_ALLMULTI)
 689                 /*
 690                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 691                  * all multicast frames
 692                  */
 693                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 694         if (*total & FIF_FCSFAIL)
 695                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 696         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 697                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 698                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 699         }
 700         if (*total & FIF_CONTROL)
 701                 wl->rx_filter |= CFG_RX_CTL_EN;
 702         if (*total & FIF_OTHER_BSS)
 703                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 704
 705         /*
 706          * FIXME: workqueues need to be properly cancelled on stop(), for
 707          * now let's just disable changing the filter settings. They will
 708          * be updated any on config().
 709          */
 710         /* schedule_work(&wl->filter_work); */
 711 }
 712
 713 /* HW encryption */
 714 static int wl1251_set_key_type(struct wl1251 *wl,
 715                                struct wl1251_cmd_set_keys *key,
 716                                enum set_key_cmd cmd,
 717                                struct ieee80211_key_conf *mac80211_key,
 718                                const u8 *addr)
 719 {
 720         switch (mac80211_key->cipher) {
 721         case WLAN_CIPHER_SUITE_WEP40:
 722         case WLAN_CIPHER_SUITE_WEP104:
 723                 if (is_broadcast_ether_addr(addr))
 724                         key->key_type = KEY_WEP_DEFAULT;
 725                 else
 726                         key->key_type = KEY_WEP_ADDR;
 727
 728                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 729                 break;
 730         case WLAN_CIPHER_SUITE_TKIP:
 731                 if (is_broadcast_ether_addr(addr))
 732                         key->key_type = KEY_TKIP_MIC_GROUP;
 733                 else
 734                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 735
 736                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 737                 break;
 738         case WLAN_CIPHER_SUITE_CCMP:
 739                 if (is_broadcast_ether_addr(addr))
 740                         key->key_type = KEY_AES_GROUP;
 741                 else
 742                         key->key_type = KEY_AES_PAIRWISE;
 743                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 744                 break;
 745         default:
 746                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 747                 return -EOPNOTSUPP;
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 754                              struct ieee80211_vif *vif,
 755                              struct ieee80211_sta *sta,
 756                              struct ieee80211_key_conf *key)
 757 {
 758         struct wl1251 *wl = hw->priv;
 759         struct wl1251_cmd_set_keys *wl_cmd;
 760         const u8 *addr;
 761         int ret;
 762
 763         static const u8 bcast_addr[ETH_ALEN] =
 764                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 765
 766         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 767
 768         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 769         if (!wl_cmd) {
 770                 ret = -ENOMEM;
 771                 goto out;
 772         }
 773
 774         addr = sta ? sta->addr : bcast_addr;
 775
 776         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 777         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 778         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 779                      key->cipher, key->keyidx, key->keylen, key->flags);
 780         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 781
 782         if (is_zero_ether_addr(addr)) {
 783                 /* We dont support TX only encryption */
 784                 ret = -EOPNOTSUPP;
 785                 goto out;
 786         }
 787
 788         mutex_lock(&wl->mutex);
 789
 790         ret = wl1251_ps_elp_wakeup(wl);
 791         if (ret < 0)
 792                 goto out_unlock;
 793
 794         switch (cmd) {
 795         case SET_KEY:
 796                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 797                 break;
 798         case DISABLE_KEY:
 799                 wl_cmd->key_action = KEY_REMOVE;
 800                 break;
 801         default:
 802                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 803                 break;
 804         }
 805
 806         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 807         if (ret < 0) {
 808                 wl1251_error("Set KEY type failed");
 809                 goto out_sleep;
 810         }
 811
 812         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 813                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 814
 815         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 816             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 817                 /*
 818                  * We get the key in the following form:
 819                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 820                  * but the target is expecting:
 821                  * TKIP - RX MIC - TX MIC
 822                  */
 823                 memcpy(wl_cmd->key, key->key, 16);
 824                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 825                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 826
 827         } else {
 828                 memcpy(wl_cmd->key, key->key, key->keylen);
 829         }
 830         wl_cmd->key_size = key->keylen;
 831
 832         wl_cmd->id = key->keyidx;
 833         wl_cmd->ssid_profile = 0;
 834
 835         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 836
 837         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 838         if (ret < 0) {
 839                 wl1251_warning("could not set keys");
 840                 goto out_sleep;
 841         }
 842
 843 out_sleep:
 844         wl1251_ps_elp_sleep(wl);
 845
 846 out_unlock:
 847         mutex_unlock(&wl->mutex);
 848
 849 out:
 850         kfree(wl_cmd);
 851
 852         return ret;
 853 }
 854
 855 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 856                              struct ieee80211_vif *vif,
 857                              struct cfg80211_scan_request *req)
 858 {
 859         struct wl1251 *wl = hw->priv;
 860         struct sk_buff *skb;
 861         size_t ssid_len = 0;
 862         u8 *ssid = NULL;
 863         int ret;
 864
 865         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 866
 867         if (req->n_ssids) {
 868                 ssid = req->ssids[0].ssid;
 869                 ssid_len = req->ssids[0].ssid_len;
 870         }
 871
 872         mutex_lock(&wl->mutex);
 873
 874         if (wl->scanning) {
 875                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 876                 ret = -EINVAL;
 877                 goto out;
 878         }
 879
 880         ret = wl1251_ps_elp_wakeup(wl);
 881         if (ret < 0)
 882                 goto out;
 883
 884         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 885                                      req->ie, req->ie_len);
 886         if (!skb) {
 887                 ret = -ENOMEM;
 888                 goto out;
 889         }
 890
 891         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 892                                       skb->len);
 893         dev_kfree_skb(skb);
 894         if (ret < 0)
 895                 goto out_sleep;
 896
 897         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 898         if (ret < 0)
 899                 goto out_sleep;
 900
 901         wl->scanning = true;
 902
 903         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 904                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 905         if (ret < 0) {
 906                 wl->scanning = false;
 907                 goto out_sleep;
 908         }
 909
 910 out_sleep:
 911         wl1251_ps_elp_sleep(wl);
 912
 913 out:
 914         mutex_unlock(&wl->mutex);
 915
 916         return ret;
 917 }
 918
 919 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 920 {
 921         struct wl1251 *wl = hw->priv;
 922         int ret;
 923
 924         mutex_lock(&wl->mutex);
 925
 926         ret = wl1251_ps_elp_wakeup(wl);
 927         if (ret < 0)
 928                 goto out;
 929
 930         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 931         if (ret < 0)
 932                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 933
 934         wl1251_ps_elp_sleep(wl);
 935
 936 out:
 937         mutex_unlock(&wl->mutex);
 938
 939         return ret;
 940 }
 941
 942 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 943                                        struct ieee80211_vif *vif,
 944                                        struct ieee80211_bss_conf *bss_conf,
 945                                        u32 changed)
 946 {
 947         struct wl1251 *wl = hw->priv;
 948         struct sk_buff *beacon, *skb;
 949         int ret;
 950
 951         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 952
 953         mutex_lock(&wl->mutex);
 954
 955         ret = wl1251_ps_elp_wakeup(wl);
 956         if (ret < 0)
 957                 goto out;
 958
 959         if (changed & BSS_CHANGED_BSSID) {
 960                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 961
 962                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 963                 if (!skb)
 964                         goto out_sleep;
 965
 966                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 967                                               skb->data, skb->len);
 968                 dev_kfree_skb(skb);
 969                 if (ret < 0)
 970                         goto out_sleep;
 971
 972                 ret = wl1251_build_qos_null_data(wl);
 973                 if (ret < 0)
 974                         goto out;
 975
 976                 if (wl->bss_type != BSS_TYPE_IBSS) {
 977                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 978                                           wl->beacon_int, wl->dtim_period);
 979                         if (ret < 0)
 980                                 goto out_sleep;
 981                 }
 982         }
 983
 984         if (changed & BSS_CHANGED_ASSOC) {
 985                 if (bss_conf->assoc) {
 986                         wl->beacon_int = bss_conf->beacon_int;
 987
 988                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 989                         if (!skb)
 990                                 goto out_sleep;
 991
 992                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 993                                                       skb->data,
 994                                                       skb->len);
 995                         dev_kfree_skb(skb);
 996                         if (ret < 0)
 997                                 goto out_sleep;
 998
 999                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1000                         if (ret < 0)
1001                                 goto out_sleep;
1002                 } else {
1003                         /* use defaults when not associated */
1004                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1005                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1006                 }
1007         }
1008         if (changed & BSS_CHANGED_ERP_SLOT) {
1009                 if (bss_conf->use_short_slot)
1010                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1011                 else
1012                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1013                 if (ret < 0) {
1014                         wl1251_warning("Set slot time failed %d", ret);
1015                         goto out_sleep;
1016                 }
1017         }
1018
1019         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1020                 if (bss_conf->use_short_preamble)
1021                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1022                 else
1023                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1024         }
1025
1026         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1027                 if (bss_conf->use_cts_prot)
1028                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1029                 else
1030                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1031                 if (ret < 0) {
1032                         wl1251_warning("Set ctsprotect failed %d", ret);
1033                         goto out_sleep;
1034                 }
1035         }
1036
1037         if (changed & BSS_CHANGED_BEACON) {
1038                 beacon = ieee80211_beacon_get(hw, vif);
1039                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1040                                               beacon->len);
1041
1042                 if (ret < 0) {
1043                         dev_kfree_skb(beacon);
1044                         goto out_sleep;
1045                 }
1046
1047                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1048                                               beacon->len);
1049
1050                 dev_kfree_skb(beacon);
1051
1052                 if (ret < 0)
1053                         goto out_sleep;
1054
1055                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1056                                   wl->channel, wl->dtim_period);
1057
1058                 if (ret < 0)
1059                         goto out_sleep;
1060         }
1061
1062 out_sleep:
1063         wl1251_ps_elp_sleep(wl);
1064
1065 out:
1066         mutex_unlock(&wl->mutex);
1067 }
1068
1069
1070 /* can't be const, mac80211 writes to this */
1071 static struct ieee80211_rate wl1251_rates[] = {
1072         { .bitrate = 10,
1073           .hw_value = 0x1,
1074           .hw_value_short = 0x1, },
1075         { .bitrate = 20,
1076           .hw_value = 0x2,
1077           .hw_value_short = 0x2,
1078           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1079         { .bitrate = 55,
1080           .hw_value = 0x4,
1081           .hw_value_short = 0x4,
1082           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1083         { .bitrate = 110,
1084           .hw_value = 0x20,
1085           .hw_value_short = 0x20,
1086           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1087         { .bitrate = 60,
1088           .hw_value = 0x8,
1089           .hw_value_short = 0x8, },
1090         { .bitrate = 90,
1091           .hw_value = 0x10,
1092           .hw_value_short = 0x10, },
1093         { .bitrate = 120,
1094           .hw_value = 0x40,
1095           .hw_value_short = 0x40, },
1096         { .bitrate = 180,
1097           .hw_value = 0x80,
1098           .hw_value_short = 0x80, },
1099         { .bitrate = 240,
1100           .hw_value = 0x200,
1101           .hw_value_short = 0x200, },
1102         { .bitrate = 360,
1103          .hw_value = 0x400,
1104          .hw_value_short = 0x400, },
1105         { .bitrate = 480,
1106           .hw_value = 0x800,
1107           .hw_value_short = 0x800, },
1108         { .bitrate = 540,
1109           .hw_value = 0x1000,
1110           .hw_value_short = 0x1000, },
1111 };
1112
1113 /* can't be const, mac80211 writes to this */
1114 static struct ieee80211_channel wl1251_channels[] = {
1115         { .hw_value = 1, .center_freq = 2412},
1116         { .hw_value = 2, .center_freq = 2417},
1117         { .hw_value = 3, .center_freq = 2422},
1118         { .hw_value = 4, .center_freq = 2427},
1119         { .hw_value = 5, .center_freq = 2432},
1120         { .hw_value = 6, .center_freq = 2437},
1121         { .hw_value = 7, .center_freq = 2442},
1122         { .hw_value = 8, .center_freq = 2447},
1123         { .hw_value = 9, .center_freq = 2452},
1124         { .hw_value = 10, .center_freq = 2457},
1125         { .hw_value = 11, .center_freq = 2462},
1126         { .hw_value = 12, .center_freq = 2467},
1127         { .hw_value = 13, .center_freq = 2472},
1128 };
1129
1130 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1131                              const struct ieee80211_tx_queue_params *params)
1132 {
1133         enum wl1251_acx_ps_scheme ps_scheme;
1134         struct wl1251 *wl = hw->priv;
1135         int ret;
1136
1137         mutex_lock(&wl->mutex);
1138
1139         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1140
1141         ret = wl1251_ps_elp_wakeup(wl);
1142         if (ret < 0)
1143                 goto out;
1144
1145         /* mac80211 uses units of 32 usec */
1146         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1147                                 params->cw_min, params->cw_max,
1148                                 params->aifs, params->txop * 32);
1149         if (ret < 0)
1150                 goto out_sleep;
1151
1152         if (params->uapsd)
1153                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1154         else
1155                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1156
1157         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1158                                  CHANNEL_TYPE_EDCF,
1159                                  wl1251_tx_get_queue(queue), ps_scheme,
1160                                  WL1251_ACX_ACK_POLICY_LEGACY);
1161         if (ret < 0)
1162                 goto out_sleep;
1163
1164 out_sleep:
1165         wl1251_ps_elp_sleep(wl);
1166
1167 out:
1168         mutex_unlock(&wl->mutex);
1169
1170         return ret;
1171 }
1172
1173 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1174                                 struct survey_info *survey)
1175 {
1176         struct wl1251 *wl = hw->priv;
1177         struct ieee80211_conf *conf = &hw->conf;
1178
1179         if (idx != 0)
1180                 return -ENOENT;
1181
1182         survey->channel = conf->channel;
1183         survey->filled = SURVEY_INFO_NOISE_DBM;
1184         survey->noise = wl->noise;
1185
1186         return 0;
1187 }
1188
1189 /* can't be const, mac80211 writes to this */
1190 static struct ieee80211_supported_band wl1251_band_2ghz = {
1191         .channels = wl1251_channels,
1192         .n_channels = ARRAY_SIZE(wl1251_channels),
1193         .bitrates = wl1251_rates,
1194         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1195 };
1196
1197 static const struct ieee80211_ops wl1251_ops = {
1198         .start = wl1251_op_start,
1199         .stop = wl1251_op_stop,
1200         .add_interface = wl1251_op_add_interface,
1201         .remove_interface = wl1251_op_remove_interface,
1202         .config = wl1251_op_config,
1203         .configure_filter = wl1251_op_configure_filter,
1204         .tx = wl1251_op_tx,
1205         .set_key = wl1251_op_set_key,
1206         .hw_scan = wl1251_op_hw_scan,
1207         .bss_info_changed = wl1251_op_bss_info_changed,
1208         .set_rts_threshold = wl1251_op_set_rts_threshold,
1209         .conf_tx = wl1251_op_conf_tx,
1210         .get_survey = wl1251_op_get_survey,
1211 };
1212
1213 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1214 {
1215         unsigned long timeout;
1216
1217         wl1251_reg_write32(wl, EE_ADDR, offset);
1218         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1219
1220         /* EE_CTL_READ clears when data is ready */
1221         timeout = jiffies + msecs_to_jiffies(100);
1222         while (1) {
1223                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1224                         break;
1225
1226                 if (time_after(jiffies, timeout))
1227                         return -ETIMEDOUT;
1228
1229                 msleep(1);
1230         }
1231
1232         *data = wl1251_reg_read32(wl, EE_DATA);
1233         return 0;
1234 }
1235
1236 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1237                               u8 *data, size_t len)
1238 {
1239         size_t i;
1240         int ret;
1241
1242         wl1251_reg_write32(wl, EE_START, 0);
1243
1244         for (i = 0; i < len; i++) {
1245                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1246                 if (ret < 0)
1247                         return ret;
1248         }
1249
1250         return 0;
1251 }
1252
1253 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1254 {
1255         u8 mac[ETH_ALEN];
1256         int i, ret;
1257
1258         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1259
1260         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1261         if (ret < 0) {
1262                 wl1251_warning("failed to read MAC address from EEPROM");
1263                 return ret;
1264         }
1265
1266         /* MAC is stored in reverse order */
1267         for (i = 0; i < ETH_ALEN; i++)
1268                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1269
1270         return 0;
1271 }
1272
1273 static int wl1251_register_hw(struct wl1251 *wl)
1274 {
1275         int ret;
1276
1277         if (wl->mac80211_registered)
1278                 return 0;
1279
1280         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1281
1282         ret = ieee80211_register_hw(wl->hw);
1283         if (ret < 0) {
1284                 wl1251_error("unable to register mac80211 hw: %d", ret);
1285                 return ret;
1286         }
1287
1288         wl->mac80211_registered = true;
1289
1290         wl1251_notice("loaded");
1291
1292         return 0;
1293 }
1294
1295 int wl1251_init_ieee80211(struct wl1251 *wl)
1296 {
1297         int ret;
1298
1299         /* The tx descriptor buffer and the TKIP space */
1300         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1301                 + WL1251_TKIP_IV_SPACE;
1302
1303         /* unit us */
1304         /* FIXME: find a proper value */
1305         wl->hw->channel_change_time = 10000;
1306
1307         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1308                 IEEE80211_HW_SUPPORTS_PS |
1309                 IEEE80211_HW_BEACON_FILTER |
1310                 IEEE80211_HW_SUPPORTS_UAPSD;
1311
1312         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1313         wl->hw->wiphy->max_scan_ssids = 1;
1314         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1315
1316         wl->hw->queues = 4;
1317
1318         if (wl->use_eeprom)
1319                 wl1251_read_eeprom_mac(wl);
1320
1321         ret = wl1251_register_hw(wl);
1322         if (ret)
1323                 goto out;
1324
1325         wl1251_debugfs_init(wl);
1326         wl1251_notice("initialized");
1327
1328         ret = 0;
1329
1330 out:
1331         return ret;
1332 }
1333 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1334
1335 struct ieee80211_hw *wl1251_alloc_hw(void)
1336 {
1337         struct ieee80211_hw *hw;
1338         struct wl1251 *wl;
1339         int i;
1340         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1341
1342         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1343         if (!hw) {
1344                 wl1251_error("could not alloc ieee80211_hw");
1345                 return ERR_PTR(-ENOMEM);
1346         }
1347
1348         wl = hw->priv;
1349         memset(wl, 0, sizeof(*wl));
1350
1351         wl->hw = hw;
1352
1353         wl->data_in_count = 0;
1354
1355         skb_queue_head_init(&wl->tx_queue);
1356
1357         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1358         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1359         wl->channel = WL1251_DEFAULT_CHANNEL;
1360         wl->scanning = false;
1361         wl->default_key = 0;
1362         wl->listen_int = 1;
1363         wl->rx_counter = 0;
1364         wl->rx_handled = 0;
1365         wl->rx_current_buffer = 0;
1366         wl->rx_last_id = 0;
1367         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1368         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1369         wl->elp = false;
1370         wl->psm = 0;
1371         wl->psm_requested = false;
1372         wl->tx_queue_stopped = false;
1373         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1374         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1375         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1376         wl->vif = NULL;
1377
1378         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1379                 wl->tx_frames[i] = NULL;
1380
1381         wl->next_tx_complete = 0;
1382
1383         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1384         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1385
1386         /*
1387          * In case our MAC address is not correctly set,
1388          * we use a random but Nokia MAC.
1389          */
1390         memcpy(wl->mac_addr, nokia_oui, 3);
1391         get_random_bytes(wl->mac_addr + 3, 3);
1392
1393         wl->state = WL1251_STATE_OFF;
1394         mutex_init(&wl->mutex);
1395
1396         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1397         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1398
1399         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1400         if (!wl->rx_descriptor) {
1401                 wl1251_error("could not allocate memory for rx descriptor");
1402                 ieee80211_free_hw(hw);
1403                 return ERR_PTR(-ENOMEM);
1404         }
1405
1406         return hw;
1407 }
1408 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1409
1410 int wl1251_free_hw(struct wl1251 *wl)
1411 {
1412         ieee80211_unregister_hw(wl->hw);
1413
1414         wl1251_debugfs_exit(wl);
1415
1416         kfree(wl->target_mem_map);
1417         kfree(wl->data_path);
1418         vfree(wl->fw);
1419         wl->fw = NULL;
1420         kfree(wl->nvs);
1421         wl->nvs = NULL;
1422
1423         kfree(wl->rx_descriptor);
1424         wl->rx_descriptor = NULL;
1425
1426         ieee80211_free_hw(wl->hw);
1427
1428         return 0;
1429 }
1430 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1431
1432 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1433 MODULE_LICENSE("GPL");
1434 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1435 MODULE_FIRMWARE(WL1251_FW_NAME);