drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/crc32.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/vmalloc.h>
  32 #include <linux/slab.h>
  33
  34 #include "wl1251.h"
  35 #include "wl12xx_80211.h"
  36 #include "wl1251_reg.h"
  37 #include "wl1251_io.h"
  38 #include "wl1251_cmd.h"
  39 #include "wl1251_event.h"
  40 #include "wl1251_tx.h"
  41 #include "wl1251_rx.h"
  42 #include "wl1251_ps.h"
  43 #include "wl1251_init.h"
  44 #include "wl1251_debugfs.h"
  45 #include "wl1251_boot.h"
  46
  47 void wl1251_enable_interrupts(struct wl1251 *wl)
  48 {
  49         wl->if_ops->enable_irq(wl);
  50 }
  51
  52 void wl1251_disable_interrupts(struct wl1251 *wl)
  53 {
  54         wl->if_ops->disable_irq(wl);
  55 }
  56
  57 static void wl1251_power_off(struct wl1251 *wl)
  58 {
  59         wl->set_power(false);
  60 }
  61
  62 static void wl1251_power_on(struct wl1251 *wl)
  63 {
  64         wl->set_power(true);
  65 }
  66
  67 static int wl1251_fetch_firmware(struct wl1251 *wl)
  68 {
  69         const struct firmware *fw;
  70         struct device *dev = wiphy_dev(wl->hw->wiphy);
  71         int ret;
  72
  73         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  74
  75         if (ret < 0) {
  76                 wl1251_error("could not get firmware: %d", ret);
  77                 return ret;
  78         }
  79
  80         if (fw->size % 4) {
  81                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  82                              fw->size);
  83                 ret = -EILSEQ;
  84                 goto out;
  85         }
  86
  87         wl->fw_len = fw->size;
  88         wl->fw = vmalloc(wl->fw_len);
  89
  90         if (!wl->fw) {
  91                 wl1251_error("could not allocate memory for the firmware");
  92                 ret = -ENOMEM;
  93                 goto out;
  94         }
  95
  96         memcpy(wl->fw, fw->data, wl->fw_len);
  97
  98         ret = 0;
  99
 100 out:
 101         release_firmware(fw);
 102
 103         return ret;
 104 }
 105
 106 static int wl1251_fetch_nvs(struct wl1251 *wl)
 107 {
 108         const struct firmware *fw;
 109         struct device *dev = wiphy_dev(wl->hw->wiphy);
 110         int ret;
 111
 112         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 113
 114         if (ret < 0) {
 115                 wl1251_error("could not get nvs file: %d", ret);
 116                 return ret;
 117         }
 118
 119         if (fw->size % 4) {
 120                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 121                              fw->size);
 122                 ret = -EILSEQ;
 123                 goto out;
 124         }
 125
 126         wl->nvs_len = fw->size;
 127         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 128
 129         if (!wl->nvs) {
 130                 wl1251_error("could not allocate memory for the nvs file");
 131                 ret = -ENOMEM;
 132                 goto out;
 133         }
 134
 135         memcpy(wl->nvs, fw->data, wl->nvs_len);
 136
 137         ret = 0;
 138
 139 out:
 140         release_firmware(fw);
 141
 142         return ret;
 143 }
 144
 145 static void wl1251_fw_wakeup(struct wl1251 *wl)
 146 {
 147         u32 elp_reg;
 148
 149         elp_reg = ELPCTRL_WAKE_UP;
 150         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 151         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 152
 153         if (!(elp_reg & ELPCTRL_WLAN_READY))
 154                 wl1251_warning("WLAN not ready");
 155 }
 156
 157 static int wl1251_chip_wakeup(struct wl1251 *wl)
 158 {
 159         int ret = 0;
 160
 161         wl1251_power_on(wl);
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         /* No NVS from netlink, try to get it from the filesystem */
 206         if (wl->nvs == NULL) {
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 299                             WL1251_ACX_INTR_EVENT_B)) {
 300                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 301                                      intr);
 302                         if (intr & WL1251_ACX_INTR_EVENT_A)
 303                                 wl1251_event_handle(wl, 0);
 304                         else
 305                                 wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338
 339         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 340                               dtim_period);
 341         if (ret < 0)
 342                 goto out;
 343
 344         /*
 345          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 346          * locking we just sleep instead, for now
 347          */
 348         msleep(10);
 349
 350 out:
 351         return ret;
 352 }
 353
 354 static void wl1251_filter_work(struct work_struct *work)
 355 {
 356         struct wl1251 *wl =
 357                 container_of(work, struct wl1251, filter_work);
 358         int ret;
 359
 360         mutex_lock(&wl->mutex);
 361
 362         if (wl->state == WL1251_STATE_OFF)
 363                 goto out;
 364
 365         ret = wl1251_ps_elp_wakeup(wl);
 366         if (ret < 0)
 367                 goto out;
 368
 369         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 370                           wl->dtim_period);
 371         if (ret < 0)
 372                 goto out_sleep;
 373
 374 out_sleep:
 375         wl1251_ps_elp_sleep(wl);
 376
 377 out:
 378         mutex_unlock(&wl->mutex);
 379 }
 380
 381 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 382 {
 383         struct wl1251 *wl = hw->priv;
 384
 385         skb_queue_tail(&wl->tx_queue, skb);
 386
 387         /*
 388          * The chip specific setup must run before the first TX packet -
 389          * before that, the tx_work will not be initialized!
 390          */
 391
 392         ieee80211_queue_work(wl->hw, &wl->tx_work);
 393
 394         /*
 395          * The workqueue is slow to process the tx_queue and we need stop
 396          * the queue here, otherwise the queue will get too long.
 397          */
 398         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 399                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 400                 ieee80211_stop_queues(wl->hw);
 401
 402                 /*
 403                  * FIXME: this is racy, the variable is not properly
 404                  * protected. Maybe fix this by removing the stupid
 405                  * variable altogether and checking the real queue state?
 406                  */
 407                 wl->tx_queue_stopped = true;
 408         }
 409
 410         return NETDEV_TX_OK;
 411 }
 412
 413 static int wl1251_op_start(struct ieee80211_hw *hw)
 414 {
 415         struct wl1251 *wl = hw->priv;
 416         int ret = 0;
 417
 418         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 419
 420         mutex_lock(&wl->mutex);
 421
 422         if (wl->state != WL1251_STATE_OFF) {
 423                 wl1251_error("cannot start because not in off state: %d",
 424                              wl->state);
 425                 ret = -EBUSY;
 426                 goto out;
 427         }
 428
 429         ret = wl1251_chip_wakeup(wl);
 430         if (ret < 0)
 431                 goto out;
 432
 433         ret = wl1251_boot(wl);
 434         if (ret < 0)
 435                 goto out;
 436
 437         ret = wl1251_hw_init(wl);
 438         if (ret < 0)
 439                 goto out;
 440
 441         ret = wl1251_acx_station_id(wl);
 442         if (ret < 0)
 443                 goto out;
 444
 445         wl->state = WL1251_STATE_ON;
 446
 447         wl1251_info("firmware booted (%s)", wl->fw_ver);
 448
 449 out:
 450         if (ret < 0)
 451                 wl1251_power_off(wl);
 452
 453         mutex_unlock(&wl->mutex);
 454
 455         return ret;
 456 }
 457
 458 static void wl1251_op_stop(struct ieee80211_hw *hw)
 459 {
 460         struct wl1251 *wl = hw->priv;
 461
 462         wl1251_info("down");
 463
 464         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 465
 466         mutex_lock(&wl->mutex);
 467
 468         WARN_ON(wl->state != WL1251_STATE_ON);
 469
 470         if (wl->scanning) {
 471                 mutex_unlock(&wl->mutex);
 472                 ieee80211_scan_completed(wl->hw, true);
 473                 mutex_lock(&wl->mutex);
 474                 wl->scanning = false;
 475         }
 476
 477         wl->state = WL1251_STATE_OFF;
 478
 479         wl1251_disable_interrupts(wl);
 480
 481         mutex_unlock(&wl->mutex);
 482
 483         cancel_work_sync(&wl->irq_work);
 484         cancel_work_sync(&wl->tx_work);
 485         cancel_work_sync(&wl->filter_work);
 486
 487         mutex_lock(&wl->mutex);
 488
 489         /* let's notify MAC80211 about the remaining pending TX frames */
 490         wl1251_tx_flush(wl);
 491         wl1251_power_off(wl);
 492
 493         memset(wl->bssid, 0, ETH_ALEN);
 494         wl->listen_int = 1;
 495         wl->bss_type = MAX_BSS_TYPE;
 496
 497         wl->data_in_count = 0;
 498         wl->rx_counter = 0;
 499         wl->rx_handled = 0;
 500         wl->rx_current_buffer = 0;
 501         wl->rx_last_id = 0;
 502         wl->next_tx_complete = 0;
 503         wl->elp = false;
 504         wl->psm = 0;
 505         wl->tx_queue_stopped = false;
 506         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 507         wl->channel = WL1251_DEFAULT_CHANNEL;
 508
 509         wl1251_debugfs_reset(wl);
 510
 511         mutex_unlock(&wl->mutex);
 512 }
 513
 514 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 515                                    struct ieee80211_vif *vif)
 516 {
 517         struct wl1251 *wl = hw->priv;
 518         int ret = 0;
 519
 520         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 521                      vif->type, vif->addr);
 522
 523         mutex_lock(&wl->mutex);
 524         if (wl->vif) {
 525                 ret = -EBUSY;
 526                 goto out;
 527         }
 528
 529         wl->vif = vif;
 530
 531         switch (vif->type) {
 532         case NL80211_IFTYPE_STATION:
 533                 wl->bss_type = BSS_TYPE_STA_BSS;
 534                 break;
 535         case NL80211_IFTYPE_ADHOC:
 536                 wl->bss_type = BSS_TYPE_IBSS;
 537                 break;
 538         default:
 539                 ret = -EOPNOTSUPP;
 540                 goto out;
 541         }
 542
 543         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 544                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 545                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 546                 ret = wl1251_acx_station_id(wl);
 547                 if (ret < 0)
 548                         goto out;
 549         }
 550
 551 out:
 552         mutex_unlock(&wl->mutex);
 553         return ret;
 554 }
 555
 556 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 557                                          struct ieee80211_vif *vif)
 558 {
 559         struct wl1251 *wl = hw->priv;
 560
 561         mutex_lock(&wl->mutex);
 562         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 563         wl->vif = NULL;
 564         mutex_unlock(&wl->mutex);
 565 }
 566
 567 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 568 {
 569         struct ieee80211_qos_hdr template;
 570
 571         memset(&template, 0, sizeof(template));
 572
 573         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 574         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 575         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 576
 577         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 578                                              IEEE80211_STYPE_QOS_NULLFUNC |
 579                                              IEEE80211_FCTL_TODS);
 580
 581         /* FIXME: not sure what priority to use here */
 582         template.qos_ctrl = cpu_to_le16(0);
 583
 584         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 585                                        sizeof(template));
 586 }
 587
 588 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 589 {
 590         struct wl1251 *wl = hw->priv;
 591         struct ieee80211_conf *conf = &hw->conf;
 592         int channel, ret = 0;
 593
 594         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 595
 596         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 597                      channel,
 598                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 599                      conf->power_level);
 600
 601         mutex_lock(&wl->mutex);
 602
 603         ret = wl1251_ps_elp_wakeup(wl);
 604         if (ret < 0)
 605                 goto out;
 606
 607         if (channel != wl->channel) {
 608                 wl->channel = channel;
 609
 610                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 611                                   wl->beacon_int, wl->dtim_period);
 612                 if (ret < 0)
 613                         goto out_sleep;
 614         }
 615
 616         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 617                 wl1251_debug(DEBUG_PSM, "psm enabled");
 618
 619                 wl->psm_requested = true;
 620
 621                 wl->dtim_period = conf->ps_dtim_period;
 622
 623                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 624                                                   wl->dtim_period);
 625
 626                 /*
 627                  * mac80211 enables PSM only if we're already associated.
 628                  */
 629                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 630                 if (ret < 0)
 631                         goto out_sleep;
 632         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 633                    wl->psm_requested) {
 634                 wl1251_debug(DEBUG_PSM, "psm disabled");
 635
 636                 wl->psm_requested = false;
 637
 638                 if (wl->psm) {
 639                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 640                         if (ret < 0)
 641                                 goto out_sleep;
 642                 }
 643         }
 644
 645         if (conf->power_level != wl->power_level) {
 646                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 647                 if (ret < 0)
 648                         goto out_sleep;
 649
 650                 wl->power_level = conf->power_level;
 651         }
 652
 653 out_sleep:
 654         wl1251_ps_elp_sleep(wl);
 655
 656 out:
 657         mutex_unlock(&wl->mutex);
 658
 659         return ret;
 660 }
 661
 662 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 663                                   FIF_ALLMULTI | \
 664                                   FIF_FCSFAIL | \
 665                                   FIF_BCN_PRBRESP_PROMISC | \
 666                                   FIF_CONTROL | \
 667                                   FIF_OTHER_BSS)
 668
 669 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 670                                        unsigned int changed,
 671                                        unsigned int *total,u64 multicast)
 672 {
 673         struct wl1251 *wl = hw->priv;
 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         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 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)
 708                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 709
 710         /*
 711          * FIXME: workqueues need to be properly cancelled on stop(), for
 712          * now let's just disable changing the filter settings. They will
 713          * be updated any on config().
 714          */
 715         /* schedule_work(&wl->filter_work); */
 716 }
 717
 718 /* HW encryption */
 719 static int wl1251_set_key_type(struct wl1251 *wl,
 720                                struct wl1251_cmd_set_keys *key,
 721                                enum set_key_cmd cmd,
 722                                struct ieee80211_key_conf *mac80211_key,
 723                                const u8 *addr)
 724 {
 725         switch (mac80211_key->alg) {
 726         case ALG_WEP:
 727                 if (is_broadcast_ether_addr(addr))
 728                         key->key_type = KEY_WEP_DEFAULT;
 729                 else
 730                         key->key_type = KEY_WEP_ADDR;
 731
 732                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 733                 break;
 734         case ALG_TKIP:
 735                 if (is_broadcast_ether_addr(addr))
 736                         key->key_type = KEY_TKIP_MIC_GROUP;
 737                 else
 738                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 739
 740                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 741                 break;
 742         case ALG_CCMP:
 743                 if (is_broadcast_ether_addr(addr))
 744                         key->key_type = KEY_AES_GROUP;
 745                 else
 746                         key->key_type = KEY_AES_PAIRWISE;
 747                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 748                 break;
 749         default:
 750                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 751                 return -EOPNOTSUPP;
 752         }
 753
 754         return 0;
 755 }
 756
 757 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 758                              struct ieee80211_vif *vif,
 759                              struct ieee80211_sta *sta,
 760                              struct ieee80211_key_conf *key)
 761 {
 762         struct wl1251 *wl = hw->priv;
 763         struct wl1251_cmd_set_keys *wl_cmd;
 764         const u8 *addr;
 765         int ret;
 766
 767         static const u8 bcast_addr[ETH_ALEN] =
 768                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 769
 770         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 771
 772         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 773         if (!wl_cmd) {
 774                 ret = -ENOMEM;
 775                 goto out;
 776         }
 777
 778         addr = sta ? sta->addr : bcast_addr;
 779
 780         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 781         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 782         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 783                      key->alg, key->keyidx, key->keylen, key->flags);
 784         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 785
 786         if (is_zero_ether_addr(addr)) {
 787                 /* We dont support TX only encryption */
 788                 ret = -EOPNOTSUPP;
 789                 goto out;
 790         }
 791
 792         mutex_lock(&wl->mutex);
 793
 794         ret = wl1251_ps_elp_wakeup(wl);
 795         if (ret < 0)
 796                 goto out_unlock;
 797
 798         switch (cmd) {
 799         case SET_KEY:
 800                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 801                 break;
 802         case DISABLE_KEY:
 803                 wl_cmd->key_action = KEY_REMOVE;
 804                 break;
 805         default:
 806                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 807                 break;
 808         }
 809
 810         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 811         if (ret < 0) {
 812                 wl1251_error("Set KEY type failed");
 813                 goto out_sleep;
 814         }
 815
 816         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 817                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 818
 819         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 820             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 821                 /*
 822                  * We get the key in the following form:
 823                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 824                  * but the target is expecting:
 825                  * TKIP - RX MIC - TX MIC
 826                  */
 827                 memcpy(wl_cmd->key, key->key, 16);
 828                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 829                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 830
 831         } else {
 832                 memcpy(wl_cmd->key, key->key, key->keylen);
 833         }
 834         wl_cmd->key_size = key->keylen;
 835
 836         wl_cmd->id = key->keyidx;
 837         wl_cmd->ssid_profile = 0;
 838
 839         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 840
 841         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 842         if (ret < 0) {
 843                 wl1251_warning("could not set keys");
 844                 goto out_sleep;
 845         }
 846
 847 out_sleep:
 848         wl1251_ps_elp_sleep(wl);
 849
 850 out_unlock:
 851         mutex_unlock(&wl->mutex);
 852
 853 out:
 854         kfree(wl_cmd);
 855
 856         return ret;
 857 }
 858
 859 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 860                              struct cfg80211_scan_request *req)
 861 {
 862         struct wl1251 *wl = hw->priv;
 863         struct sk_buff *skb;
 864         size_t ssid_len = 0;
 865         u8 *ssid = NULL;
 866         int ret;
 867
 868         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 869
 870         if (req->n_ssids) {
 871                 ssid = req->ssids[0].ssid;
 872                 ssid_len = req->ssids[0].ssid_len;
 873         }
 874
 875         mutex_lock(&wl->mutex);
 876
 877         if (wl->scanning) {
 878                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 879                 ret = -EINVAL;
 880                 goto out;
 881         }
 882
 883         ret = wl1251_ps_elp_wakeup(wl);
 884         if (ret < 0)
 885                 goto out;
 886
 887         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 888                                      req->ie, req->ie_len);
 889         if (!skb) {
 890                 ret = -ENOMEM;
 891                 goto out;
 892         }
 893
 894         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 895                                       skb->len);
 896         dev_kfree_skb(skb);
 897         if (ret < 0)
 898                 goto out_sleep;
 899
 900         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 901         if (ret < 0)
 902                 goto out_sleep;
 903
 904         wl->scanning = true;
 905
 906         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 907                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 908         if (ret < 0) {
 909                 wl->scanning = false;
 910                 goto out_sleep;
 911         }
 912
 913 out_sleep:
 914         wl1251_ps_elp_sleep(wl);
 915
 916 out:
 917         mutex_unlock(&wl->mutex);
 918
 919         return ret;
 920 }
 921
 922 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 923 {
 924         struct wl1251 *wl = hw->priv;
 925         int ret;
 926
 927         mutex_lock(&wl->mutex);
 928
 929         ret = wl1251_ps_elp_wakeup(wl);
 930         if (ret < 0)
 931                 goto out;
 932
 933         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 934         if (ret < 0)
 935                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 936
 937         wl1251_ps_elp_sleep(wl);
 938
 939 out:
 940         mutex_unlock(&wl->mutex);
 941
 942         return ret;
 943 }
 944
 945 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 946                                        struct ieee80211_vif *vif,
 947                                        struct ieee80211_bss_conf *bss_conf,
 948                                        u32 changed)
 949 {
 950         struct wl1251 *wl = hw->priv;
 951         struct sk_buff *beacon, *skb;
 952         int ret;
 953
 954         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 955
 956         mutex_lock(&wl->mutex);
 957
 958         ret = wl1251_ps_elp_wakeup(wl);
 959         if (ret < 0)
 960                 goto out;
 961
 962         if (changed & BSS_CHANGED_BSSID) {
 963                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 964
 965                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 966                 if (!skb)
 967                         goto out_sleep;
 968
 969                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 970                                               skb->data, skb->len);
 971                 dev_kfree_skb(skb);
 972                 if (ret < 0)
 973                         goto out_sleep;
 974
 975                 ret = wl1251_build_qos_null_data(wl);
 976                 if (ret < 0)
 977                         goto out;
 978
 979                 if (wl->bss_type != BSS_TYPE_IBSS) {
 980                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 981                                           wl->beacon_int, wl->dtim_period);
 982                         if (ret < 0)
 983                                 goto out_sleep;
 984                 }
 985         }
 986
 987         if (changed & BSS_CHANGED_ASSOC) {
 988                 if (bss_conf->assoc) {
 989                         wl->beacon_int = bss_conf->beacon_int;
 990
 991                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 992                         if (!skb)
 993                                 goto out_sleep;
 994
 995                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 996                                                       skb->data,
 997                                                       skb->len);
 998                         dev_kfree_skb(skb);
 999                         if (ret < 0)
1000                                 goto out_sleep;
1001
1002                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1003                         if (ret < 0)
1004                                 goto out_sleep;
1005                 } else {
1006                         /* use defaults when not associated */
1007                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1008                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1009                 }
1010         }
1011         if (changed & BSS_CHANGED_ERP_SLOT) {
1012                 if (bss_conf->use_short_slot)
1013                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1014                 else
1015                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1016                 if (ret < 0) {
1017                         wl1251_warning("Set slot time failed %d", ret);
1018                         goto out_sleep;
1019                 }
1020         }
1021
1022         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1023                 if (bss_conf->use_short_preamble)
1024                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1025                 else
1026                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1027         }
1028
1029         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1030                 if (bss_conf->use_cts_prot)
1031                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1032                 else
1033                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1034                 if (ret < 0) {
1035                         wl1251_warning("Set ctsprotect failed %d", ret);
1036                         goto out_sleep;
1037                 }
1038         }
1039
1040         if (changed & BSS_CHANGED_BEACON) {
1041                 beacon = ieee80211_beacon_get(hw, vif);
1042                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1043                                               beacon->len);
1044
1045                 if (ret < 0) {
1046                         dev_kfree_skb(beacon);
1047                         goto out_sleep;
1048                 }
1049
1050                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1051                                               beacon->len);
1052
1053                 dev_kfree_skb(beacon);
1054
1055                 if (ret < 0)
1056                         goto out_sleep;
1057
1058                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1059                                   wl->channel, wl->dtim_period);
1060
1061                 if (ret < 0)
1062                         goto out_sleep;
1063         }
1064
1065 out_sleep:
1066         wl1251_ps_elp_sleep(wl);
1067
1068 out:
1069         mutex_unlock(&wl->mutex);
1070 }
1071
1072
1073 /* can't be const, mac80211 writes to this */
1074 static struct ieee80211_rate wl1251_rates[] = {
1075         { .bitrate = 10,
1076           .hw_value = 0x1,
1077           .hw_value_short = 0x1, },
1078         { .bitrate = 20,
1079           .hw_value = 0x2,
1080           .hw_value_short = 0x2,
1081           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1082         { .bitrate = 55,
1083           .hw_value = 0x4,
1084           .hw_value_short = 0x4,
1085           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1086         { .bitrate = 110,
1087           .hw_value = 0x20,
1088           .hw_value_short = 0x20,
1089           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1090         { .bitrate = 60,
1091           .hw_value = 0x8,
1092           .hw_value_short = 0x8, },
1093         { .bitrate = 90,
1094           .hw_value = 0x10,
1095           .hw_value_short = 0x10, },
1096         { .bitrate = 120,
1097           .hw_value = 0x40,
1098           .hw_value_short = 0x40, },
1099         { .bitrate = 180,
1100           .hw_value = 0x80,
1101           .hw_value_short = 0x80, },
1102         { .bitrate = 240,
1103           .hw_value = 0x200,
1104           .hw_value_short = 0x200, },
1105         { .bitrate = 360,
1106          .hw_value = 0x400,
1107          .hw_value_short = 0x400, },
1108         { .bitrate = 480,
1109           .hw_value = 0x800,
1110           .hw_value_short = 0x800, },
1111         { .bitrate = 540,
1112           .hw_value = 0x1000,
1113           .hw_value_short = 0x1000, },
1114 };
1115
1116 /* can't be const, mac80211 writes to this */
1117 static struct ieee80211_channel wl1251_channels[] = {
1118         { .hw_value = 1, .center_freq = 2412},
1119         { .hw_value = 2, .center_freq = 2417},
1120         { .hw_value = 3, .center_freq = 2422},
1121         { .hw_value = 4, .center_freq = 2427},
1122         { .hw_value = 5, .center_freq = 2432},
1123         { .hw_value = 6, .center_freq = 2437},
1124         { .hw_value = 7, .center_freq = 2442},
1125         { .hw_value = 8, .center_freq = 2447},
1126         { .hw_value = 9, .center_freq = 2452},
1127         { .hw_value = 10, .center_freq = 2457},
1128         { .hw_value = 11, .center_freq = 2462},
1129         { .hw_value = 12, .center_freq = 2467},
1130         { .hw_value = 13, .center_freq = 2472},
1131 };
1132
1133 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1134                              const struct ieee80211_tx_queue_params *params)
1135 {
1136         enum wl1251_acx_ps_scheme ps_scheme;
1137         struct wl1251 *wl = hw->priv;
1138         int ret;
1139
1140         mutex_lock(&wl->mutex);
1141
1142         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1143
1144         ret = wl1251_ps_elp_wakeup(wl);
1145         if (ret < 0)
1146                 goto out;
1147
1148         /* mac80211 uses units of 32 usec */
1149         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1150                                 params->cw_min, params->cw_max,
1151                                 params->aifs, params->txop * 32);
1152         if (ret < 0)
1153                 goto out_sleep;
1154
1155         if (params->uapsd)
1156                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1157         else
1158                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1159
1160         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1161                                  CHANNEL_TYPE_EDCF,
1162                                  wl1251_tx_get_queue(queue), ps_scheme,
1163                                  WL1251_ACX_ACK_POLICY_LEGACY);
1164         if (ret < 0)
1165                 goto out_sleep;
1166
1167 out_sleep:
1168         wl1251_ps_elp_sleep(wl);
1169
1170 out:
1171         mutex_unlock(&wl->mutex);
1172
1173         return ret;
1174 }
1175
1176 /* can't be const, mac80211 writes to this */
1177 static struct ieee80211_supported_band wl1251_band_2ghz = {
1178         .channels = wl1251_channels,
1179         .n_channels = ARRAY_SIZE(wl1251_channels),
1180         .bitrates = wl1251_rates,
1181         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1182 };
1183
1184 static const struct ieee80211_ops wl1251_ops = {
1185         .start = wl1251_op_start,
1186         .stop = wl1251_op_stop,
1187         .add_interface = wl1251_op_add_interface,
1188         .remove_interface = wl1251_op_remove_interface,
1189         .config = wl1251_op_config,
1190         .configure_filter = wl1251_op_configure_filter,
1191         .tx = wl1251_op_tx,
1192         .set_key = wl1251_op_set_key,
1193         .hw_scan = wl1251_op_hw_scan,
1194         .bss_info_changed = wl1251_op_bss_info_changed,
1195         .set_rts_threshold = wl1251_op_set_rts_threshold,
1196         .conf_tx = wl1251_op_conf_tx,
1197 };
1198
1199 static int wl1251_register_hw(struct wl1251 *wl)
1200 {
1201         int ret;
1202
1203         if (wl->mac80211_registered)
1204                 return 0;
1205
1206         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1207
1208         ret = ieee80211_register_hw(wl->hw);
1209         if (ret < 0) {
1210                 wl1251_error("unable to register mac80211 hw: %d", ret);
1211                 return ret;
1212         }
1213
1214         wl->mac80211_registered = true;
1215
1216         wl1251_notice("loaded");
1217
1218         return 0;
1219 }
1220
1221 int wl1251_init_ieee80211(struct wl1251 *wl)
1222 {
1223         int ret;
1224
1225         /* The tx descriptor buffer and the TKIP space */
1226         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1227                 + WL1251_TKIP_IV_SPACE;
1228
1229         /* unit us */
1230         /* FIXME: find a proper value */
1231         wl->hw->channel_change_time = 10000;
1232
1233         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1234                 IEEE80211_HW_NOISE_DBM |
1235                 IEEE80211_HW_SUPPORTS_PS |
1236                 IEEE80211_HW_BEACON_FILTER |
1237                 IEEE80211_HW_SUPPORTS_UAPSD;
1238
1239         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1240         wl->hw->wiphy->max_scan_ssids = 1;
1241         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1242
1243         wl->hw->queues = 4;
1244
1245         ret = wl1251_register_hw(wl);
1246         if (ret)
1247                 goto out;
1248
1249         wl1251_debugfs_init(wl);
1250         wl1251_notice("initialized");
1251
1252         ret = 0;
1253
1254 out:
1255         return ret;
1256 }
1257 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1258
1259 struct ieee80211_hw *wl1251_alloc_hw(void)
1260 {
1261         struct ieee80211_hw *hw;
1262         struct wl1251 *wl;
1263         int i;
1264         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1265
1266         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1267         if (!hw) {
1268                 wl1251_error("could not alloc ieee80211_hw");
1269                 return ERR_PTR(-ENOMEM);
1270         }
1271
1272         wl = hw->priv;
1273         memset(wl, 0, sizeof(*wl));
1274
1275         wl->hw = hw;
1276
1277         wl->data_in_count = 0;
1278
1279         skb_queue_head_init(&wl->tx_queue);
1280
1281         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1282         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1283         wl->channel = WL1251_DEFAULT_CHANNEL;
1284         wl->scanning = false;
1285         wl->default_key = 0;
1286         wl->listen_int = 1;
1287         wl->rx_counter = 0;
1288         wl->rx_handled = 0;
1289         wl->rx_current_buffer = 0;
1290         wl->rx_last_id = 0;
1291         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1292         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1293         wl->elp = false;
1294         wl->psm = 0;
1295         wl->psm_requested = false;
1296         wl->tx_queue_stopped = false;
1297         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1298         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1299         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1300         wl->vif = NULL;
1301
1302         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1303                 wl->tx_frames[i] = NULL;
1304
1305         wl->next_tx_complete = 0;
1306
1307         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1308         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1309
1310         /*
1311          * In case our MAC address is not correctly set,
1312          * we use a random but Nokia MAC.
1313          */
1314         memcpy(wl->mac_addr, nokia_oui, 3);
1315         get_random_bytes(wl->mac_addr + 3, 3);
1316
1317         wl->state = WL1251_STATE_OFF;
1318         mutex_init(&wl->mutex);
1319
1320         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1321         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1322
1323         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1324         if (!wl->rx_descriptor) {
1325                 wl1251_error("could not allocate memory for rx descriptor");
1326                 ieee80211_free_hw(hw);
1327                 return ERR_PTR(-ENOMEM);
1328         }
1329
1330         return hw;
1331 }
1332 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1333
1334 int wl1251_free_hw(struct wl1251 *wl)
1335 {
1336         ieee80211_unregister_hw(wl->hw);
1337
1338         wl1251_debugfs_exit(wl);
1339
1340         kfree(wl->target_mem_map);
1341         kfree(wl->data_path);
1342         vfree(wl->fw);
1343         wl->fw = NULL;
1344         kfree(wl->nvs);
1345         wl->nvs = NULL;
1346
1347         kfree(wl->rx_descriptor);
1348         wl->rx_descriptor = NULL;
1349
1350         ieee80211_free_hw(wl->hw);
1351
1352         return 0;
1353 }
1354 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1355
1356 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1357 MODULE_LICENSE("GPL");
1358 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1359 MODULE_ALIAS("spi:wl1251");
1360 MODULE_FIRMWARE(WL1251_FW_NAME);