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
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "wl1251_reg.h"
  36 #include "wl1251_io.h"
  37 #include "wl1251_cmd.h"
  38 #include "wl1251_event.h"
  39 #include "wl1251_tx.h"
  40 #include "wl1251_rx.h"
  41 #include "wl1251_ps.h"
  42 #include "wl1251_init.h"
  43 #include "wl1251_debugfs.h"
  44 #include "wl1251_boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static void wl1251_power_off(struct wl1251 *wl)
  57 {
  58         wl->set_power(false);
  59 }
  60
  61 static void wl1251_power_on(struct wl1251 *wl)
  62 {
  63         wl->set_power(true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         memcpy(wl->nvs, fw->data, wl->nvs_len);
 135
 136         ret = 0;
 137
 138 out:
 139         release_firmware(fw);
 140
 141         return ret;
 142 }
 143
 144 static void wl1251_fw_wakeup(struct wl1251 *wl)
 145 {
 146         u32 elp_reg;
 147
 148         elp_reg = ELPCTRL_WAKE_UP;
 149         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 150         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 151
 152         if (!(elp_reg & ELPCTRL_WLAN_READY))
 153                 wl1251_warning("WLAN not ready");
 154 }
 155
 156 static int wl1251_chip_wakeup(struct wl1251 *wl)
 157 {
 158         int ret = 0;
 159
 160         wl1251_power_on(wl);
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         /* No NVS from netlink, try to get it from the filesystem */
 205         if (wl->nvs == NULL) {
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 10
 216 static void wl1251_irq_work(struct work_struct *work)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl =
 220                 container_of(work, struct wl1251, irq_work);
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 298                             WL1251_ACX_INTR_EVENT_B)) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 300                                      intr);
 301                         if (intr & WL1251_ACX_INTR_EVENT_A)
 302                                 wl1251_event_handle(wl, 0);
 303                         else
 304                                 wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 if (--ctr == 0)
 312                         break;
 313
 314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 315         } while (intr);
 316
 317 out_sleep:
 318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 319         wl1251_ps_elp_sleep(wl);
 320
 321 out:
 322         mutex_unlock(&wl->mutex);
 323 }
 324
 325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 326                        u16 beacon_interval, u8 dtim_period)
 327 {
 328         int ret;
 329
 330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 332                                      wl->tx_mgmt_frm_rate,
 333                                      wl->tx_mgmt_frm_mod);
 334         if (ret < 0)
 335                 goto out;
 336
 337
 338         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 339                               dtim_period);
 340         if (ret < 0)
 341                 goto out;
 342
 343         /*
 344          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 345          * locking we just sleep instead, for now
 346          */
 347         msleep(10);
 348
 349 out:
 350         return ret;
 351 }
 352
 353 static void wl1251_filter_work(struct work_struct *work)
 354 {
 355         struct wl1251 *wl =
 356                 container_of(work, struct wl1251, filter_work);
 357         int ret;
 358
 359         mutex_lock(&wl->mutex);
 360
 361         if (wl->state == WL1251_STATE_OFF)
 362                 goto out;
 363
 364         ret = wl1251_ps_elp_wakeup(wl);
 365         if (ret < 0)
 366                 goto out;
 367
 368         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 369                           wl->dtim_period);
 370         if (ret < 0)
 371                 goto out_sleep;
 372
 373 out_sleep:
 374         wl1251_ps_elp_sleep(wl);
 375
 376 out:
 377         mutex_unlock(&wl->mutex);
 378 }
 379
 380 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 381 {
 382         struct wl1251 *wl = hw->priv;
 383
 384         skb_queue_tail(&wl->tx_queue, skb);
 385
 386         /*
 387          * The chip specific setup must run before the first TX packet -
 388          * before that, the tx_work will not be initialized!
 389          */
 390
 391         ieee80211_queue_work(wl->hw, &wl->tx_work);
 392
 393         /*
 394          * The workqueue is slow to process the tx_queue and we need stop
 395          * the queue here, otherwise the queue will get too long.
 396          */
 397         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 398                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 399                 ieee80211_stop_queues(wl->hw);
 400
 401                 /*
 402                  * FIXME: this is racy, the variable is not properly
 403                  * protected. Maybe fix this by removing the stupid
 404                  * variable altogether and checking the real queue state?
 405                  */
 406                 wl->tx_queue_stopped = true;
 407         }
 408
 409         return NETDEV_TX_OK;
 410 }
 411
 412 static int wl1251_op_start(struct ieee80211_hw *hw)
 413 {
 414         struct wl1251 *wl = hw->priv;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448 out:
 449         if (ret < 0)
 450                 wl1251_power_off(wl);
 451
 452         mutex_unlock(&wl->mutex);
 453
 454         return ret;
 455 }
 456
 457 static void wl1251_op_stop(struct ieee80211_hw *hw)
 458 {
 459         struct wl1251 *wl = hw->priv;
 460
 461         wl1251_info("down");
 462
 463         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 464
 465         mutex_lock(&wl->mutex);
 466
 467         WARN_ON(wl->state != WL1251_STATE_ON);
 468
 469         if (wl->scanning) {
 470                 mutex_unlock(&wl->mutex);
 471                 ieee80211_scan_completed(wl->hw, true);
 472                 mutex_lock(&wl->mutex);
 473                 wl->scanning = false;
 474         }
 475
 476         wl->state = WL1251_STATE_OFF;
 477
 478         wl1251_disable_interrupts(wl);
 479
 480         mutex_unlock(&wl->mutex);
 481
 482         cancel_work_sync(&wl->irq_work);
 483         cancel_work_sync(&wl->tx_work);
 484         cancel_work_sync(&wl->filter_work);
 485
 486         mutex_lock(&wl->mutex);
 487
 488         /* let's notify MAC80211 about the remaining pending TX frames */
 489         wl1251_tx_flush(wl);
 490         wl1251_power_off(wl);
 491
 492         memset(wl->bssid, 0, ETH_ALEN);
 493         wl->listen_int = 1;
 494         wl->bss_type = MAX_BSS_TYPE;
 495
 496         wl->data_in_count = 0;
 497         wl->rx_counter = 0;
 498         wl->rx_handled = 0;
 499         wl->rx_current_buffer = 0;
 500         wl->rx_last_id = 0;
 501         wl->next_tx_complete = 0;
 502         wl->elp = false;
 503         wl->psm = 0;
 504         wl->tx_queue_stopped = false;
 505         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 506         wl->channel = WL1251_DEFAULT_CHANNEL;
 507
 508         wl1251_debugfs_reset(wl);
 509
 510         mutex_unlock(&wl->mutex);
 511 }
 512
 513 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 514                                    struct ieee80211_vif *vif)
 515 {
 516         struct wl1251 *wl = hw->priv;
 517         int ret = 0;
 518
 519         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 520                      vif->type, vif->addr);
 521
 522         mutex_lock(&wl->mutex);
 523         if (wl->vif) {
 524                 ret = -EBUSY;
 525                 goto out;
 526         }
 527
 528         wl->vif = vif;
 529
 530         switch (vif->type) {
 531         case NL80211_IFTYPE_STATION:
 532                 wl->bss_type = BSS_TYPE_STA_BSS;
 533                 break;
 534         case NL80211_IFTYPE_ADHOC:
 535                 wl->bss_type = BSS_TYPE_IBSS;
 536                 break;
 537         default:
 538                 ret = -EOPNOTSUPP;
 539                 goto out;
 540         }
 541
 542         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 543                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 544                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 545                 ret = wl1251_acx_station_id(wl);
 546                 if (ret < 0)
 547                         goto out;
 548         }
 549
 550 out:
 551         mutex_unlock(&wl->mutex);
 552         return ret;
 553 }
 554
 555 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 556                                          struct ieee80211_vif *vif)
 557 {
 558         struct wl1251 *wl = hw->priv;
 559
 560         mutex_lock(&wl->mutex);
 561         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 562         wl->vif = NULL;
 563         mutex_unlock(&wl->mutex);
 564 }
 565
 566 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 567 {
 568         struct wl1251 *wl = hw->priv;
 569         struct ieee80211_conf *conf = &hw->conf;
 570         int channel, ret = 0;
 571
 572         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 573
 574         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 575                      channel,
 576                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 577                      conf->power_level);
 578
 579         mutex_lock(&wl->mutex);
 580
 581         ret = wl1251_ps_elp_wakeup(wl);
 582         if (ret < 0)
 583                 goto out;
 584
 585         if (channel != wl->channel) {
 586                 wl->channel = channel;
 587
 588                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 589                                   wl->beacon_int, wl->dtim_period);
 590                 if (ret < 0)
 591                         goto out_sleep;
 592         }
 593
 594         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 595                 wl1251_debug(DEBUG_PSM, "psm enabled");
 596
 597                 wl->psm_requested = true;
 598
 599                 /*
 600                  * We enter PSM only if we're already associated.
 601                  * If we're not, we'll enter it when joining an SSID,
 602                  * through the bss_info_changed() hook.
 603                  */
 604                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 605                 if (ret < 0)
 606                         goto out_sleep;
 607         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 608                    wl->psm_requested) {
 609                 wl1251_debug(DEBUG_PSM, "psm disabled");
 610
 611                 wl->psm_requested = false;
 612
 613                 if (wl->psm) {
 614                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 615                         if (ret < 0)
 616                                 goto out_sleep;
 617                 }
 618         }
 619
 620         if (conf->power_level != wl->power_level) {
 621                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 622                 if (ret < 0)
 623                         goto out_sleep;
 624
 625                 wl->power_level = conf->power_level;
 626         }
 627
 628 out_sleep:
 629         wl1251_ps_elp_sleep(wl);
 630
 631 out:
 632         mutex_unlock(&wl->mutex);
 633
 634         return ret;
 635 }
 636
 637 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 638                                   FIF_ALLMULTI | \
 639                                   FIF_FCSFAIL | \
 640                                   FIF_BCN_PRBRESP_PROMISC | \
 641                                   FIF_CONTROL | \
 642                                   FIF_OTHER_BSS)
 643
 644 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 645                                        unsigned int changed,
 646                                        unsigned int *total,u64 multicast)
 647 {
 648         struct wl1251 *wl = hw->priv;
 649
 650         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 651
 652         *total &= WL1251_SUPPORTED_FILTERS;
 653         changed &= WL1251_SUPPORTED_FILTERS;
 654
 655         if (changed == 0)
 656                 /* no filters which we support changed */
 657                 return;
 658
 659         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 660
 661         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 662         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 663
 664         if (*total & FIF_PROMISC_IN_BSS) {
 665                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 666                 wl->rx_config |= CFG_RX_ALL_GOOD;
 667         }
 668         if (*total & FIF_ALLMULTI)
 669                 /*
 670                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 671                  * all multicast frames
 672                  */
 673                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 674         if (*total & FIF_FCSFAIL)
 675                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 676         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 677                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 678                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 679         }
 680         if (*total & FIF_CONTROL)
 681                 wl->rx_filter |= CFG_RX_CTL_EN;
 682         if (*total & FIF_OTHER_BSS)
 683                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 684
 685         /*
 686          * FIXME: workqueues need to be properly cancelled on stop(), for
 687          * now let's just disable changing the filter settings. They will
 688          * be updated any on config().
 689          */
 690         /* schedule_work(&wl->filter_work); */
 691 }
 692
 693 /* HW encryption */
 694 static int wl1251_set_key_type(struct wl1251 *wl,
 695                                struct wl1251_cmd_set_keys *key,
 696                                enum set_key_cmd cmd,
 697                                struct ieee80211_key_conf *mac80211_key,
 698                                const u8 *addr)
 699 {
 700         switch (mac80211_key->alg) {
 701         case ALG_WEP:
 702                 if (is_broadcast_ether_addr(addr))
 703                         key->key_type = KEY_WEP_DEFAULT;
 704                 else
 705                         key->key_type = KEY_WEP_ADDR;
 706
 707                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 708                 break;
 709         case ALG_TKIP:
 710                 if (is_broadcast_ether_addr(addr))
 711                         key->key_type = KEY_TKIP_MIC_GROUP;
 712                 else
 713                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 714
 715                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 716                 break;
 717         case ALG_CCMP:
 718                 if (is_broadcast_ether_addr(addr))
 719                         key->key_type = KEY_AES_GROUP;
 720                 else
 721                         key->key_type = KEY_AES_PAIRWISE;
 722                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 723                 break;
 724         default:
 725                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 726                 return -EOPNOTSUPP;
 727         }
 728
 729         return 0;
 730 }
 731
 732 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 733                              struct ieee80211_vif *vif,
 734                              struct ieee80211_sta *sta,
 735                              struct ieee80211_key_conf *key)
 736 {
 737         struct wl1251 *wl = hw->priv;
 738         struct wl1251_cmd_set_keys *wl_cmd;
 739         const u8 *addr;
 740         int ret;
 741
 742         static const u8 bcast_addr[ETH_ALEN] =
 743                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 744
 745         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 746
 747         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 748         if (!wl_cmd) {
 749                 ret = -ENOMEM;
 750                 goto out;
 751         }
 752
 753         addr = sta ? sta->addr : bcast_addr;
 754
 755         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 756         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 757         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 758                      key->alg, key->keyidx, key->keylen, key->flags);
 759         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 760
 761         if (is_zero_ether_addr(addr)) {
 762                 /* We dont support TX only encryption */
 763                 ret = -EOPNOTSUPP;
 764                 goto out;
 765         }
 766
 767         mutex_lock(&wl->mutex);
 768
 769         ret = wl1251_ps_elp_wakeup(wl);
 770         if (ret < 0)
 771                 goto out_unlock;
 772
 773         switch (cmd) {
 774         case SET_KEY:
 775                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 776                 break;
 777         case DISABLE_KEY:
 778                 wl_cmd->key_action = KEY_REMOVE;
 779                 break;
 780         default:
 781                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 782                 break;
 783         }
 784
 785         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 786         if (ret < 0) {
 787                 wl1251_error("Set KEY type failed");
 788                 goto out_sleep;
 789         }
 790
 791         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 792                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 793
 794         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 795             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 796                 /*
 797                  * We get the key in the following form:
 798                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 799                  * but the target is expecting:
 800                  * TKIP - RX MIC - TX MIC
 801                  */
 802                 memcpy(wl_cmd->key, key->key, 16);
 803                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 804                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 805
 806         } else {
 807                 memcpy(wl_cmd->key, key->key, key->keylen);
 808         }
 809         wl_cmd->key_size = key->keylen;
 810
 811         wl_cmd->id = key->keyidx;
 812         wl_cmd->ssid_profile = 0;
 813
 814         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 815
 816         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 817         if (ret < 0) {
 818                 wl1251_warning("could not set keys");
 819                 goto out_sleep;
 820         }
 821
 822 out_sleep:
 823         wl1251_ps_elp_sleep(wl);
 824
 825 out_unlock:
 826         mutex_unlock(&wl->mutex);
 827
 828 out:
 829         kfree(wl_cmd);
 830
 831         return ret;
 832 }
 833
 834 static int wl1251_build_basic_rates(char *rates)
 835 {
 836         u8 index = 0;
 837
 838         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 839         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 840         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 841         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 842
 843         return index;
 844 }
 845
 846 static int wl1251_build_extended_rates(char *rates)
 847 {
 848         u8 index = 0;
 849
 850         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 851         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 852         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 853         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 854         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 855         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 856         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 857         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 858
 859         return index;
 860 }
 861
 862
 863 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
 864 {
 865         struct wl12xx_probe_req_template template;
 866         struct wl12xx_ie_rates *rates;
 867         char *ptr;
 868         u16 size;
 869
 870         ptr = (char *)&template;
 871         size = sizeof(struct ieee80211_header);
 872
 873         memset(template.header.da, 0xff, ETH_ALEN);
 874         memset(template.header.bssid, 0xff, ETH_ALEN);
 875         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 876         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 877
 878         /* IEs */
 879         /* SSID */
 880         template.ssid.header.id = WLAN_EID_SSID;
 881         template.ssid.header.len = ssid_len;
 882         if (ssid_len && ssid)
 883                 memcpy(template.ssid.ssid, ssid, ssid_len);
 884         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 885         ptr += size;
 886
 887         /* Basic Rates */
 888         rates = (struct wl12xx_ie_rates *)ptr;
 889         rates->header.id = WLAN_EID_SUPP_RATES;
 890         rates->header.len = wl1251_build_basic_rates(rates->rates);
 891         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 892         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 893
 894         /* Extended rates */
 895         rates = (struct wl12xx_ie_rates *)ptr;
 896         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 897         rates->header.len = wl1251_build_extended_rates(rates->rates);
 898         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 899
 900         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 901
 902         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 903                                       size);
 904 }
 905
 906 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 907                              struct cfg80211_scan_request *req)
 908 {
 909         struct wl1251 *wl = hw->priv;
 910         size_t ssid_len = 0;
 911         u8 *ssid = NULL;
 912         int ret;
 913
 914         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 915
 916         if (req->n_ssids) {
 917                 ssid = req->ssids[0].ssid;
 918                 ssid_len = req->ssids[0].ssid_len;
 919         }
 920
 921         mutex_lock(&wl->mutex);
 922
 923         if (wl->scanning) {
 924                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 925                 ret = -EINVAL;
 926                 goto out;
 927         }
 928
 929         ret = wl1251_ps_elp_wakeup(wl);
 930         if (ret < 0)
 931                 goto out;
 932
 933         ret = wl1251_build_probe_req(wl, ssid, ssid_len);
 934         if (ret < 0)
 935                 wl1251_error("probe request template build failed");
 936
 937         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 938         if (ret < 0)
 939                 goto out_sleep;
 940
 941         wl->scanning = true;
 942
 943         ret = wl1251_cmd_scan(wl, ssid, ssid_len, 13, 3);
 944         if (ret < 0) {
 945                 wl->scanning = false;
 946                 goto out_sleep;
 947         }
 948
 949 out_sleep:
 950         wl1251_ps_elp_sleep(wl);
 951
 952 out:
 953         mutex_unlock(&wl->mutex);
 954
 955         return ret;
 956 }
 957
 958 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 959 {
 960         struct wl1251 *wl = hw->priv;
 961         int ret;
 962
 963         mutex_lock(&wl->mutex);
 964
 965         ret = wl1251_ps_elp_wakeup(wl);
 966         if (ret < 0)
 967                 goto out;
 968
 969         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 970         if (ret < 0)
 971                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 972
 973         wl1251_ps_elp_sleep(wl);
 974
 975 out:
 976         mutex_unlock(&wl->mutex);
 977
 978         return ret;
 979 }
 980
 981 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 982                                        struct ieee80211_vif *vif,
 983                                        struct ieee80211_bss_conf *bss_conf,
 984                                        u32 changed)
 985 {
 986         enum wl1251_cmd_ps_mode mode;
 987         struct wl1251 *wl = hw->priv;
 988         struct sk_buff *beacon, *skb;
 989         int ret;
 990
 991         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 992
 993         mutex_lock(&wl->mutex);
 994
 995         ret = wl1251_ps_elp_wakeup(wl);
 996         if (ret < 0)
 997                 goto out;
 998
 999         if (changed & BSS_CHANGED_BSSID) {
1000                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1001
1002                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1003                 if (!skb)
1004                         goto out_sleep;
1005
1006                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1007                                               skb->data, skb->len);
1008                 dev_kfree_skb(skb);
1009                 if (ret < 0)
1010                         goto out;
1011
1012                 if (wl->bss_type != BSS_TYPE_IBSS) {
1013                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1014                                           wl->beacon_int, wl->dtim_period);
1015                         if (ret < 0)
1016                                 goto out_sleep;
1017                 }
1018         }
1019
1020         if (changed & BSS_CHANGED_ASSOC) {
1021                 if (bss_conf->assoc) {
1022                         wl->beacon_int = bss_conf->beacon_int;
1023                         wl->dtim_period = bss_conf->dtim_period;
1024
1025                         ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
1026                                                           wl->dtim_period);
1027                         wl->aid = bss_conf->aid;
1028
1029                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1030                         if (!skb)
1031                                 goto out_sleep;
1032
1033                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1034                                                       skb->data,
1035                                                       skb->len);
1036                         dev_kfree_skb(skb);
1037                         if (ret < 0)
1038                                 goto out_sleep;
1039
1040                         ret = wl1251_acx_aid(wl, wl->aid);
1041                         if (ret < 0)
1042                                 goto out_sleep;
1043
1044                         /* If we want to go in PSM but we're not there yet */
1045                         if (wl->psm_requested && !wl->psm) {
1046                                 mode = STATION_POWER_SAVE_MODE;
1047                                 ret = wl1251_ps_set_mode(wl, mode);
1048                                 if (ret < 0)
1049                                         goto out_sleep;
1050                         }
1051                 } else {
1052                         /* use defaults when not associated */
1053                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1054                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1055                 }
1056         }
1057         if (changed & BSS_CHANGED_ERP_SLOT) {
1058                 if (bss_conf->use_short_slot)
1059                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1060                 else
1061                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1062                 if (ret < 0) {
1063                         wl1251_warning("Set slot time failed %d", ret);
1064                         goto out_sleep;
1065                 }
1066         }
1067
1068         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1069                 if (bss_conf->use_short_preamble)
1070                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1071                 else
1072                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1073         }
1074
1075         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1076                 if (bss_conf->use_cts_prot)
1077                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1078                 else
1079                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1080                 if (ret < 0) {
1081                         wl1251_warning("Set ctsprotect failed %d", ret);
1082                         goto out;
1083                 }
1084         }
1085
1086         if (changed & BSS_CHANGED_BEACON) {
1087                 beacon = ieee80211_beacon_get(hw, vif);
1088                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1089                                               beacon->len);
1090
1091                 if (ret < 0) {
1092                         dev_kfree_skb(beacon);
1093                         goto out;
1094                 }
1095
1096                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1097                                               beacon->len);
1098
1099                 dev_kfree_skb(beacon);
1100
1101                 if (ret < 0)
1102                         goto out;
1103
1104                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1105                                   wl->channel, wl->dtim_period);
1106
1107                 if (ret < 0)
1108                         goto out;
1109         }
1110
1111 out_sleep:
1112         wl1251_ps_elp_sleep(wl);
1113
1114 out:
1115         mutex_unlock(&wl->mutex);
1116 }
1117
1118
1119 /* can't be const, mac80211 writes to this */
1120 static struct ieee80211_rate wl1251_rates[] = {
1121         { .bitrate = 10,
1122           .hw_value = 0x1,
1123           .hw_value_short = 0x1, },
1124         { .bitrate = 20,
1125           .hw_value = 0x2,
1126           .hw_value_short = 0x2,
1127           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1128         { .bitrate = 55,
1129           .hw_value = 0x4,
1130           .hw_value_short = 0x4,
1131           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1132         { .bitrate = 110,
1133           .hw_value = 0x20,
1134           .hw_value_short = 0x20,
1135           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1136         { .bitrate = 60,
1137           .hw_value = 0x8,
1138           .hw_value_short = 0x8, },
1139         { .bitrate = 90,
1140           .hw_value = 0x10,
1141           .hw_value_short = 0x10, },
1142         { .bitrate = 120,
1143           .hw_value = 0x40,
1144           .hw_value_short = 0x40, },
1145         { .bitrate = 180,
1146           .hw_value = 0x80,
1147           .hw_value_short = 0x80, },
1148         { .bitrate = 240,
1149           .hw_value = 0x200,
1150           .hw_value_short = 0x200, },
1151         { .bitrate = 360,
1152          .hw_value = 0x400,
1153          .hw_value_short = 0x400, },
1154         { .bitrate = 480,
1155           .hw_value = 0x800,
1156           .hw_value_short = 0x800, },
1157         { .bitrate = 540,
1158           .hw_value = 0x1000,
1159           .hw_value_short = 0x1000, },
1160 };
1161
1162 /* can't be const, mac80211 writes to this */
1163 static struct ieee80211_channel wl1251_channels[] = {
1164         { .hw_value = 1, .center_freq = 2412},
1165         { .hw_value = 2, .center_freq = 2417},
1166         { .hw_value = 3, .center_freq = 2422},
1167         { .hw_value = 4, .center_freq = 2427},
1168         { .hw_value = 5, .center_freq = 2432},
1169         { .hw_value = 6, .center_freq = 2437},
1170         { .hw_value = 7, .center_freq = 2442},
1171         { .hw_value = 8, .center_freq = 2447},
1172         { .hw_value = 9, .center_freq = 2452},
1173         { .hw_value = 10, .center_freq = 2457},
1174         { .hw_value = 11, .center_freq = 2462},
1175         { .hw_value = 12, .center_freq = 2467},
1176         { .hw_value = 13, .center_freq = 2472},
1177 };
1178
1179 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1180                              const struct ieee80211_tx_queue_params *params)
1181 {
1182         struct wl1251 *wl = hw->priv;
1183         int ret;
1184
1185         mutex_lock(&wl->mutex);
1186
1187         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1188
1189         ret = wl1251_ps_elp_wakeup(wl);
1190         if (ret < 0)
1191                 goto out;
1192
1193         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1194                                 params->cw_min, params->cw_max,
1195                                 params->aifs, params->txop);
1196         if (ret < 0)
1197                 goto out_sleep;
1198
1199         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1200                                  CHANNEL_TYPE_EDCF,
1201                                  wl1251_tx_get_queue(queue),
1202                                  WL1251_ACX_PS_SCHEME_LEGACY,
1203                                  WL1251_ACX_ACK_POLICY_LEGACY);
1204         if (ret < 0)
1205                 goto out_sleep;
1206
1207 out_sleep:
1208         wl1251_ps_elp_sleep(wl);
1209
1210 out:
1211         mutex_unlock(&wl->mutex);
1212
1213         return ret;
1214 }
1215
1216 /* can't be const, mac80211 writes to this */
1217 static struct ieee80211_supported_band wl1251_band_2ghz = {
1218         .channels = wl1251_channels,
1219         .n_channels = ARRAY_SIZE(wl1251_channels),
1220         .bitrates = wl1251_rates,
1221         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1222 };
1223
1224 static const struct ieee80211_ops wl1251_ops = {
1225         .start = wl1251_op_start,
1226         .stop = wl1251_op_stop,
1227         .add_interface = wl1251_op_add_interface,
1228         .remove_interface = wl1251_op_remove_interface,
1229         .config = wl1251_op_config,
1230         .configure_filter = wl1251_op_configure_filter,
1231         .tx = wl1251_op_tx,
1232         .set_key = wl1251_op_set_key,
1233         .hw_scan = wl1251_op_hw_scan,
1234         .bss_info_changed = wl1251_op_bss_info_changed,
1235         .set_rts_threshold = wl1251_op_set_rts_threshold,
1236         .conf_tx = wl1251_op_conf_tx,
1237 };
1238
1239 static int wl1251_register_hw(struct wl1251 *wl)
1240 {
1241         int ret;
1242
1243         if (wl->mac80211_registered)
1244                 return 0;
1245
1246         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1247
1248         ret = ieee80211_register_hw(wl->hw);
1249         if (ret < 0) {
1250                 wl1251_error("unable to register mac80211 hw: %d", ret);
1251                 return ret;
1252         }
1253
1254         wl->mac80211_registered = true;
1255
1256         wl1251_notice("loaded");
1257
1258         return 0;
1259 }
1260
1261 int wl1251_init_ieee80211(struct wl1251 *wl)
1262 {
1263         int ret;
1264
1265         /* The tx descriptor buffer and the TKIP space */
1266         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1267                 + WL1251_TKIP_IV_SPACE;
1268
1269         /* unit us */
1270         /* FIXME: find a proper value */
1271         wl->hw->channel_change_time = 10000;
1272
1273         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1274                 IEEE80211_HW_NOISE_DBM |
1275                 IEEE80211_HW_SUPPORTS_PS |
1276                 IEEE80211_HW_BEACON_FILTER;
1277
1278         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1279         wl->hw->wiphy->max_scan_ssids = 1;
1280         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1281
1282         wl->hw->queues = 4;
1283
1284         ret = wl1251_register_hw(wl);
1285         if (ret)
1286                 goto out;
1287
1288         wl1251_debugfs_init(wl);
1289         wl1251_notice("initialized");
1290
1291         ret = 0;
1292
1293 out:
1294         return ret;
1295 }
1296 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1297
1298 struct ieee80211_hw *wl1251_alloc_hw(void)
1299 {
1300         struct ieee80211_hw *hw;
1301         struct wl1251 *wl;
1302         int i;
1303         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1304
1305         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1306         if (!hw) {
1307                 wl1251_error("could not alloc ieee80211_hw");
1308                 return ERR_PTR(-ENOMEM);
1309         }
1310
1311         wl = hw->priv;
1312         memset(wl, 0, sizeof(*wl));
1313
1314         wl->hw = hw;
1315
1316         wl->data_in_count = 0;
1317
1318         skb_queue_head_init(&wl->tx_queue);
1319
1320         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1321         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1322         wl->channel = WL1251_DEFAULT_CHANNEL;
1323         wl->scanning = false;
1324         wl->default_key = 0;
1325         wl->listen_int = 1;
1326         wl->rx_counter = 0;
1327         wl->rx_handled = 0;
1328         wl->rx_current_buffer = 0;
1329         wl->rx_last_id = 0;
1330         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1331         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1332         wl->elp = false;
1333         wl->psm = 0;
1334         wl->psm_requested = false;
1335         wl->tx_queue_stopped = false;
1336         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1337         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1338         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1339         wl->vif = NULL;
1340
1341         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1342                 wl->tx_frames[i] = NULL;
1343
1344         wl->next_tx_complete = 0;
1345
1346         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1347         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1348
1349         /*
1350          * In case our MAC address is not correctly set,
1351          * we use a random but Nokia MAC.
1352          */
1353         memcpy(wl->mac_addr, nokia_oui, 3);
1354         get_random_bytes(wl->mac_addr + 3, 3);
1355
1356         wl->state = WL1251_STATE_OFF;
1357         mutex_init(&wl->mutex);
1358
1359         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1360         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1361
1362         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1363         if (!wl->rx_descriptor) {
1364                 wl1251_error("could not allocate memory for rx descriptor");
1365                 ieee80211_free_hw(hw);
1366                 return ERR_PTR(-ENOMEM);
1367         }
1368
1369         return hw;
1370 }
1371 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1372
1373 int wl1251_free_hw(struct wl1251 *wl)
1374 {
1375         ieee80211_unregister_hw(wl->hw);
1376
1377         wl1251_debugfs_exit(wl);
1378
1379         kfree(wl->target_mem_map);
1380         kfree(wl->data_path);
1381         vfree(wl->fw);
1382         wl->fw = NULL;
1383         kfree(wl->nvs);
1384         wl->nvs = NULL;
1385
1386         kfree(wl->rx_descriptor);
1387         wl->rx_descriptor = NULL;
1388
1389         ieee80211_free_hw(wl->hw);
1390
1391         return 0;
1392 }
1393 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1394
1395 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1396 MODULE_LICENSE("GPL");
1397 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1398 MODULE_ALIAS("spi:wl1251");
1399 MODULE_FIRMWARE(WL1251_FW_NAME);