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 #if (LINUX_VERSION_CODE == KERNEL_VERSION(2,6,28))
  30 #include <linux/device.h>
  31 #endif
  32 #include <linux/crc32.h>
  33 #include <linux/etherdevice.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include "wl1251.h"
  37 #include "wl12xx_80211.h"
  38 #include "wl1251_reg.h"
  39 #include "wl1251_io.h"
  40 #include "wl1251_cmd.h"
  41 #include "wl1251_event.h"
  42 #include "wl1251_tx.h"
  43 #include "wl1251_rx.h"
  44 #include "wl1251_ps.h"
  45 #include "wl1251_init.h"
  46 #include "wl1251_debugfs.h"
  47 #include "wl1251_boot.h"
  48
  49 void wl1251_enable_interrupts(struct wl1251 *wl)
  50 {
  51         wl->if_ops->enable_irq(wl);
  52 }
  53
  54 void wl1251_disable_interrupts(struct wl1251 *wl)
  55 {
  56         wl->if_ops->disable_irq(wl);
  57 }
  58
  59 static void wl1251_power_off(struct wl1251 *wl)
  60 {
  61         wl->set_power(false);
  62 }
  63
  64 static void wl1251_power_on(struct wl1251 *wl)
  65 {
  66         wl->set_power(true);
  67 }
  68
  69 static int wl1251_fetch_firmware(struct wl1251 *wl)
  70 {
  71         const struct firmware *fw;
  72         struct device *dev = wiphy_dev(wl->hw->wiphy);
  73         int ret;
  74
  75         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  76
  77         if (ret < 0) {
  78                 wl1251_error("could not get firmware: %d", ret);
  79                 return ret;
  80         }
  81
  82         if (fw->size % 4) {
  83                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  84                              fw->size);
  85                 ret = -EILSEQ;
  86                 goto out;
  87         }
  88
  89         wl->fw_len = fw->size;
  90         wl->fw = vmalloc(wl->fw_len);
  91
  92         if (!wl->fw) {
  93                 wl1251_error("could not allocate memory for the firmware");
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97
  98         memcpy(wl->fw, fw->data, wl->fw_len);
  99
 100         ret = 0;
 101
 102 out:
 103         release_firmware(fw);
 104
 105         return ret;
 106 }
 107
 108 static int wl1251_fetch_nvs(struct wl1251 *wl)
 109 {
 110         const struct firmware *fw;
 111         struct device *dev = wiphy_dev(wl->hw->wiphy);
 112         int ret;
 113
 114         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 115
 116         if (ret < 0) {
 117                 wl1251_error("could not get nvs file: %d", ret);
 118                 return ret;
 119         }
 120
 121         if (fw->size % 4) {
 122                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 123                              fw->size);
 124                 ret = -EILSEQ;
 125                 goto out;
 126         }
 127
 128         wl->nvs_len = fw->size;
 129         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 130
 131         if (!wl->nvs) {
 132                 wl1251_error("could not allocate memory for the nvs file");
 133                 ret = -ENOMEM;
 134                 goto out;
 135         }
 136
 137         memcpy(wl->nvs, fw->data, wl->nvs_len);
 138
 139         ret = 0;
 140
 141 out:
 142         release_firmware(fw);
 143
 144         return ret;
 145 }
 146
 147 static void wl1251_fw_wakeup(struct wl1251 *wl)
 148 {
 149         u32 elp_reg;
 150
 151         elp_reg = ELPCTRL_WAKE_UP;
 152         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 153         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 154
 155         if (!(elp_reg & ELPCTRL_WLAN_READY))
 156                 wl1251_warning("WLAN not ready");
 157 }
 158
 159 static int wl1251_chip_wakeup(struct wl1251 *wl)
 160 {
 161         int ret = 0;
 162
 163         wl1251_power_on(wl);
 164         msleep(WL1251_POWER_ON_SLEEP);
 165         wl->if_ops->reset(wl);
 166
 167         /* We don't need a real memory partition here, because we only want
 168          * to use the registers at this point. */
 169         wl1251_set_partition(wl,
 170                              0x00000000,
 171                              0x00000000,
 172                              REGISTERS_BASE,
 173                              REGISTERS_DOWN_SIZE);
 174
 175         /* ELP module wake up */
 176         wl1251_fw_wakeup(wl);
 177
 178         /* whal_FwCtrl_BootSm() */
 179
 180         /* 0. read chip id from CHIP_ID */
 181         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 182
 183         /* 1. check if chip id is valid */
 184
 185         switch (wl->chip_id) {
 186         case CHIP_ID_1251_PG12:
 187                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 188                              wl->chip_id);
 189                 break;
 190         case CHIP_ID_1251_PG11:
 191                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 192                              wl->chip_id);
 193                 break;
 194         case CHIP_ID_1251_PG10:
 195         default:
 196                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 197                 ret = -ENODEV;
 198                 goto out;
 199         }
 200
 201         if (wl->fw == NULL) {
 202                 ret = wl1251_fetch_firmware(wl);
 203                 if (ret < 0)
 204                         goto out;
 205         }
 206
 207         if (wl->nvs == NULL && !wl->use_eeprom) {
 208                 /* No NVS from netlink, try to get it from the filesystem */
 209                 ret = wl1251_fetch_nvs(wl);
 210                 if (ret < 0)
 211                         goto out;
 212         }
 213
 214 out:
 215         return ret;
 216 }
 217
 218 #define WL1251_IRQ_LOOP_COUNT 10
 219 static void wl1251_irq_work(struct work_struct *work)
 220 {
 221         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 222         struct wl1251 *wl =
 223                 container_of(work, struct wl1251, irq_work);
 224         int ret;
 225
 226         mutex_lock(&wl->mutex);
 227
 228         wl1251_debug(DEBUG_IRQ, "IRQ work");
 229
 230         if (wl->state == WL1251_STATE_OFF)
 231                 goto out;
 232
 233         ret = wl1251_ps_elp_wakeup(wl);
 234         if (ret < 0)
 235                 goto out;
 236
 237         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 238
 239         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 240         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 241
 242         do {
 243                 if (wl->data_path) {
 244                         wl->rx_counter = wl1251_mem_read32(
 245                                 wl, wl->data_path->rx_control_addr);
 246
 247                         /* We handle a frmware bug here */
 248                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 249                         case 0:
 250                                 wl1251_debug(DEBUG_IRQ,
 251                                              "RX: FW and host in sync");
 252                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 253                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 254                                 break;
 255                         case 1:
 256                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 257                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 258                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 259                                 break;
 260                         case 2:
 261                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 262                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 263                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 264                                 break;
 265                         default:
 266                                 wl1251_warning(
 267                                         "RX: FW and host out of sync: %d",
 268                                         wl->rx_counter - wl->rx_handled);
 269                                 break;
 270                         }
 271
 272                         wl->rx_handled = wl->rx_counter;
 273
 274                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 275                                      wl->rx_counter);
 276                 }
 277
 278                 intr &= wl->intr_mask;
 279
 280                 if (intr == 0) {
 281                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 282                         goto out_sleep;
 283                 }
 284
 285                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 286                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 287                         wl1251_rx(wl);
 288                 }
 289
 290                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 291                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 292                         wl1251_rx(wl);
 293                 }
 294
 295                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 296                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 297                         wl1251_tx_complete(wl);
 298                 }
 299
 300                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 301                             WL1251_ACX_INTR_EVENT_B)) {
 302                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 303                                      intr);
 304                         if (intr & WL1251_ACX_INTR_EVENT_A)
 305                                 wl1251_event_handle(wl, 0);
 306                         else
 307                                 wl1251_event_handle(wl, 1);
 308                 }
 309
 310                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 311                         wl1251_debug(DEBUG_IRQ,
 312                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 313
 314                 if (--ctr == 0)
 315                         break;
 316
 317                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 318         } while (intr);
 319
 320 out_sleep:
 321         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 322         wl1251_ps_elp_sleep(wl);
 323
 324 out:
 325         mutex_unlock(&wl->mutex);
 326 }
 327
 328 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 329                        u16 beacon_interval, u8 dtim_period)
 330 {
 331         int ret;
 332
 333         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 334                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 335                                      wl->tx_mgmt_frm_rate,
 336                                      wl->tx_mgmt_frm_mod);
 337         if (ret < 0)
 338                 goto out;
 339
 340
 341         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 342                               dtim_period);
 343         if (ret < 0)
 344                 goto out;
 345
 346         /*
 347          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 348          * locking we just sleep instead, for now
 349          */
 350         msleep(10);
 351
 352 out:
 353         return ret;
 354 }
 355
 356 static void wl1251_filter_work(struct work_struct *work)
 357 {
 358         struct wl1251 *wl =
 359                 container_of(work, struct wl1251, filter_work);
 360         int ret;
 361
 362         mutex_lock(&wl->mutex);
 363
 364         if (wl->state == WL1251_STATE_OFF)
 365                 goto out;
 366
 367         ret = wl1251_ps_elp_wakeup(wl);
 368         if (ret < 0)
 369                 goto out;
 370
 371         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 372                           wl->dtim_period);
 373         if (ret < 0)
 374                 goto out_sleep;
 375
 376 out_sleep:
 377         wl1251_ps_elp_sleep(wl);
 378
 379 out:
 380         mutex_unlock(&wl->mutex);
 381 }
 382
 383 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386
 387         skb_queue_tail(&wl->tx_queue, skb);
 388
 389         /*
 390          * The chip specific setup must run before the first TX packet -
 391          * before that, the tx_work will not be initialized!
 392          */
 393
 394         ieee80211_queue_work(wl->hw, &wl->tx_work);
 395
 396         /*
 397          * The workqueue is slow to process the tx_queue and we need stop
 398          * the queue here, otherwise the queue will get too long.
 399          */
 400         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 401                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 402                 ieee80211_stop_queues(wl->hw);
 403
 404                 /*
 405                  * FIXME: this is racy, the variable is not properly
 406                  * protected. Maybe fix this by removing the stupid
 407                  * variable altogether and checking the real queue state?
 408                  */
 409                 wl->tx_queue_stopped = true;
 410         }
 411
 412         return NETDEV_TX_OK;
 413 }
 414
 415 static int wl1251_op_start(struct ieee80211_hw *hw)
 416 {
 417         struct wl1251 *wl = hw->priv;
 418         struct wiphy *wiphy = hw->wiphy;
 419         int ret = 0;
 420
 421         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 422
 423         mutex_lock(&wl->mutex);
 424
 425         if (wl->state != WL1251_STATE_OFF) {
 426                 wl1251_error("cannot start because not in off state: %d",
 427                              wl->state);
 428                 ret = -EBUSY;
 429                 goto out;
 430         }
 431
 432         ret = wl1251_chip_wakeup(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_boot(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_hw_init(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         ret = wl1251_acx_station_id(wl);
 445         if (ret < 0)
 446                 goto out;
 447
 448         wl->state = WL1251_STATE_ON;
 449
 450         wl1251_info("firmware booted (%s)", wl->fw_ver);
 451
 452         /* update hw/fw version info in wiphy struct */
 453         wiphy->hw_version = wl->chip_id;
 454         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 455
 456 out:
 457         if (ret < 0)
 458                 wl1251_power_off(wl);
 459
 460         mutex_unlock(&wl->mutex);
 461
 462         return ret;
 463 }
 464
 465 static void wl1251_op_stop(struct ieee80211_hw *hw)
 466 {
 467         struct wl1251 *wl = hw->priv;
 468
 469         wl1251_info("down");
 470
 471         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 472
 473         mutex_lock(&wl->mutex);
 474
 475         WARN_ON(wl->state != WL1251_STATE_ON);
 476
 477         if (wl->scanning) {
 478                 mutex_unlock(&wl->mutex);
 479                 ieee80211_scan_completed(wl->hw, true);
 480                 mutex_lock(&wl->mutex);
 481                 wl->scanning = false;
 482         }
 483
 484         wl->state = WL1251_STATE_OFF;
 485
 486         wl1251_disable_interrupts(wl);
 487
 488         mutex_unlock(&wl->mutex);
 489
 490         cancel_work_sync(&wl->irq_work);
 491         cancel_work_sync(&wl->tx_work);
 492         cancel_work_sync(&wl->filter_work);
 493
 494         mutex_lock(&wl->mutex);
 495
 496         /* let's notify MAC80211 about the remaining pending TX frames */
 497         wl1251_tx_flush(wl);
 498         wl1251_power_off(wl);
 499
 500         memset(wl->bssid, 0, ETH_ALEN);
 501         wl->listen_int = 1;
 502         wl->bss_type = MAX_BSS_TYPE;
 503
 504         wl->data_in_count = 0;
 505         wl->rx_counter = 0;
 506         wl->rx_handled = 0;
 507         wl->rx_current_buffer = 0;
 508         wl->rx_last_id = 0;
 509         wl->next_tx_complete = 0;
 510         wl->elp = false;
 511         wl->psm = 0;
 512         wl->tx_queue_stopped = false;
 513         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 514         wl->channel = WL1251_DEFAULT_CHANNEL;
 515
 516         wl1251_debugfs_reset(wl);
 517
 518         mutex_unlock(&wl->mutex);
 519 }
 520
 521 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 522                                    struct ieee80211_vif *vif)
 523 {
 524         struct wl1251 *wl = hw->priv;
 525         int ret = 0;
 526
 527         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 528                      vif->type, vif->addr);
 529
 530         mutex_lock(&wl->mutex);
 531         if (wl->vif) {
 532                 ret = -EBUSY;
 533                 goto out;
 534         }
 535
 536         wl->vif = vif;
 537
 538         switch (vif->type) {
 539         case NL80211_IFTYPE_STATION:
 540                 wl->bss_type = BSS_TYPE_STA_BSS;
 541                 break;
 542         case NL80211_IFTYPE_ADHOC:
 543                 wl->bss_type = BSS_TYPE_IBSS;
 544                 break;
 545         default:
 546                 ret = -EOPNOTSUPP;
 547                 goto out;
 548         }
 549
 550         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 551                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 552                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 553                 ret = wl1251_acx_station_id(wl);
 554                 if (ret < 0)
 555                         goto out;
 556         }
 557
 558 out:
 559         mutex_unlock(&wl->mutex);
 560         return ret;
 561 }
 562
 563 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 564                                          struct ieee80211_vif *vif)
 565 {
 566         struct wl1251 *wl = hw->priv;
 567
 568         mutex_lock(&wl->mutex);
 569         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 570         wl->vif = NULL;
 571         mutex_unlock(&wl->mutex);
 572 }
 573
 574 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 575 {
 576         struct ieee80211_qos_hdr template;
 577
 578         memset(&template, 0, sizeof(template));
 579
 580         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 581         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 582         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 583
 584         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 585                                              IEEE80211_STYPE_QOS_NULLFUNC |
 586                                              IEEE80211_FCTL_TODS);
 587
 588         /* FIXME: not sure what priority to use here */
 589         template.qos_ctrl = cpu_to_le16(0);
 590
 591         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 592                                        sizeof(template));
 593 }
 594
 595 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 596 {
 597         struct wl1251 *wl = hw->priv;
 598         struct ieee80211_conf *conf = &hw->conf;
 599         int channel, ret = 0;
 600
 601         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 602
 603         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 604                      channel,
 605                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 606                      conf->power_level);
 607
 608         mutex_lock(&wl->mutex);
 609
 610         ret = wl1251_ps_elp_wakeup(wl);
 611         if (ret < 0)
 612                 goto out;
 613
 614         if (channel != wl->channel) {
 615                 wl->channel = channel;
 616
 617                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 618                                   wl->beacon_int, wl->dtim_period);
 619                 if (ret < 0)
 620                         goto out_sleep;
 621         }
 622
 623         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 624                 wl1251_debug(DEBUG_PSM, "psm enabled");
 625
 626                 wl->psm_requested = true;
 627
 628                 wl->dtim_period = conf->ps_dtim_period;
 629
 630                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 631                                                   wl->dtim_period);
 632
 633                 /*
 634                  * mac80211 enables PSM only if we're already associated.
 635                  */
 636                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 637                 if (ret < 0)
 638                         goto out_sleep;
 639         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 640                    wl->psm_requested) {
 641                 wl1251_debug(DEBUG_PSM, "psm disabled");
 642
 643                 wl->psm_requested = false;
 644
 645                 if (wl->psm) {
 646                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 647                         if (ret < 0)
 648                                 goto out_sleep;
 649                 }
 650         }
 651
 652         if (conf->power_level != wl->power_level) {
 653                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 654                 if (ret < 0)
 655                         goto out_sleep;
 656
 657                 wl->power_level = conf->power_level;
 658         }
 659
 660 out_sleep:
 661         wl1251_ps_elp_sleep(wl);
 662
 663 out:
 664         mutex_unlock(&wl->mutex);
 665
 666         return ret;
 667 }
 668
 669 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 670                                   FIF_ALLMULTI | \
 671                                   FIF_FCSFAIL | \
 672                                   FIF_BCN_PRBRESP_PROMISC | \
 673                                   FIF_CONTROL | \
 674                                   FIF_OTHER_BSS)
 675
 676 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 677                                        unsigned int changed,
 678                                        unsigned int *total,u64 multicast)
 679 {
 680         struct wl1251 *wl = hw->priv;
 681
 682         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 683
 684         *total &= WL1251_SUPPORTED_FILTERS;
 685         changed &= WL1251_SUPPORTED_FILTERS;
 686
 687         if (changed == 0)
 688                 /* no filters which we support changed */
 689                 return;
 690
 691         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 692
 693         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 694         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 695
 696         if (*total & FIF_PROMISC_IN_BSS) {
 697                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 698                 wl->rx_config |= CFG_RX_ALL_GOOD;
 699         }
 700         if (*total & FIF_ALLMULTI)
 701                 /*
 702                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 703                  * all multicast frames
 704                  */
 705                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 706         if (*total & FIF_FCSFAIL)
 707                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 708         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 709                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 710                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 711         }
 712         if (*total & FIF_CONTROL)
 713                 wl->rx_filter |= CFG_RX_CTL_EN;
 714         if (*total & FIF_OTHER_BSS)
 715                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 716
 717         /*
 718          * FIXME: workqueues need to be properly cancelled on stop(), for
 719          * now let's just disable changing the filter settings. They will
 720          * be updated any on config().
 721          */
 722         /* schedule_work(&wl->filter_work); */
 723 }
 724
 725 /* HW encryption */
 726 static int wl1251_set_key_type(struct wl1251 *wl,
 727                                struct wl1251_cmd_set_keys *key,
 728                                enum set_key_cmd cmd,
 729                                struct ieee80211_key_conf *mac80211_key,
 730                                const u8 *addr)
 731 {
 732         switch (mac80211_key->alg) {
 733         case ALG_WEP:
 734                 if (is_broadcast_ether_addr(addr))
 735                         key->key_type = KEY_WEP_DEFAULT;
 736                 else
 737                         key->key_type = KEY_WEP_ADDR;
 738
 739                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 740                 break;
 741         case ALG_TKIP:
 742                 if (is_broadcast_ether_addr(addr))
 743                         key->key_type = KEY_TKIP_MIC_GROUP;
 744                 else
 745                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 746
 747                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 748                 break;
 749         case ALG_CCMP:
 750                 if (is_broadcast_ether_addr(addr))
 751                         key->key_type = KEY_AES_GROUP;
 752                 else
 753                         key->key_type = KEY_AES_PAIRWISE;
 754                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 755                 break;
 756         default:
 757                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 758                 return -EOPNOTSUPP;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 765                              struct ieee80211_vif *vif,
 766                              struct ieee80211_sta *sta,
 767                              struct ieee80211_key_conf *key)
 768 {
 769         struct wl1251 *wl = hw->priv;
 770         struct wl1251_cmd_set_keys *wl_cmd;
 771         const u8 *addr;
 772         int ret;
 773
 774         static const u8 bcast_addr[ETH_ALEN] =
 775                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 776
 777         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 778
 779         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 780         if (!wl_cmd) {
 781                 ret = -ENOMEM;
 782                 goto out;
 783         }
 784
 785         addr = sta ? sta->addr : bcast_addr;
 786
 787         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 788         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 789         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 790                      key->alg, key->keyidx, key->keylen, key->flags);
 791         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 792
 793         if (is_zero_ether_addr(addr)) {
 794                 /* We dont support TX only encryption */
 795                 ret = -EOPNOTSUPP;
 796                 goto out;
 797         }
 798
 799         mutex_lock(&wl->mutex);
 800
 801         ret = wl1251_ps_elp_wakeup(wl);
 802         if (ret < 0)
 803                 goto out_unlock;
 804
 805         switch (cmd) {
 806         case SET_KEY:
 807                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 808                 break;
 809         case DISABLE_KEY:
 810                 wl_cmd->key_action = KEY_REMOVE;
 811                 break;
 812         default:
 813                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 814                 break;
 815         }
 816
 817         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 818         if (ret < 0) {
 819                 wl1251_error("Set KEY type failed");
 820                 goto out_sleep;
 821         }
 822
 823         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 824                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 825
 826         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 827             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 828                 /*
 829                  * We get the key in the following form:
 830                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 831                  * but the target is expecting:
 832                  * TKIP - RX MIC - TX MIC
 833                  */
 834                 memcpy(wl_cmd->key, key->key, 16);
 835                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 836                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 837
 838         } else {
 839                 memcpy(wl_cmd->key, key->key, key->keylen);
 840         }
 841         wl_cmd->key_size = key->keylen;
 842
 843         wl_cmd->id = key->keyidx;
 844         wl_cmd->ssid_profile = 0;
 845
 846         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 847
 848         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 849         if (ret < 0) {
 850                 wl1251_warning("could not set keys");
 851                 goto out_sleep;
 852         }
 853
 854 out_sleep:
 855         wl1251_ps_elp_sleep(wl);
 856
 857 out_unlock:
 858         mutex_unlock(&wl->mutex);
 859
 860 out:
 861         kfree(wl_cmd);
 862
 863         return ret;
 864 }
 865
 866 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 867                              struct cfg80211_scan_request *req)
 868 {
 869         struct wl1251 *wl = hw->priv;
 870         struct sk_buff *skb;
 871         size_t ssid_len = 0;
 872         u8 *ssid = NULL;
 873         int ret;
 874
 875         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 876
 877         if (req->n_ssids) {
 878                 ssid = req->ssids[0].ssid;
 879                 ssid_len = req->ssids[0].ssid_len;
 880         }
 881
 882         mutex_lock(&wl->mutex);
 883
 884         if (wl->scanning) {
 885                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 886                 ret = -EINVAL;
 887                 goto out;
 888         }
 889
 890         ret = wl1251_ps_elp_wakeup(wl);
 891         if (ret < 0)
 892                 goto out;
 893
 894         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 895                                      req->ie, req->ie_len);
 896         if (!skb) {
 897                 ret = -ENOMEM;
 898                 goto out;
 899         }
 900
 901         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 902                                       skb->len);
 903         dev_kfree_skb(skb);
 904         if (ret < 0)
 905                 goto out_sleep;
 906
 907         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 908         if (ret < 0)
 909                 goto out_sleep;
 910
 911         wl->scanning = true;
 912
 913         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 914                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 915         if (ret < 0) {
 916                 wl->scanning = false;
 917                 goto out_sleep;
 918         }
 919
 920 out_sleep:
 921         wl1251_ps_elp_sleep(wl);
 922
 923 out:
 924         mutex_unlock(&wl->mutex);
 925
 926         return ret;
 927 }
 928
 929 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 930 {
 931         struct wl1251 *wl = hw->priv;
 932         int ret;
 933
 934         mutex_lock(&wl->mutex);
 935
 936         ret = wl1251_ps_elp_wakeup(wl);
 937         if (ret < 0)
 938                 goto out;
 939
 940         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 941         if (ret < 0)
 942                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 943
 944         wl1251_ps_elp_sleep(wl);
 945
 946 out:
 947         mutex_unlock(&wl->mutex);
 948
 949         return ret;
 950 }
 951
 952 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 953                                        struct ieee80211_vif *vif,
 954                                        struct ieee80211_bss_conf *bss_conf,
 955                                        u32 changed)
 956 {
 957         struct wl1251 *wl = hw->priv;
 958         struct sk_buff *beacon, *skb;
 959         int ret;
 960
 961         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 962
 963         mutex_lock(&wl->mutex);
 964
 965         ret = wl1251_ps_elp_wakeup(wl);
 966         if (ret < 0)
 967                 goto out;
 968
 969         if (changed & BSS_CHANGED_BSSID) {
 970                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 971
 972                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 973                 if (!skb)
 974                         goto out_sleep;
 975
 976                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 977                                               skb->data, skb->len);
 978                 dev_kfree_skb(skb);
 979                 if (ret < 0)
 980                         goto out_sleep;
 981
 982                 ret = wl1251_build_qos_null_data(wl);
 983                 if (ret < 0)
 984                         goto out;
 985
 986                 if (wl->bss_type != BSS_TYPE_IBSS) {
 987                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 988                                           wl->beacon_int, wl->dtim_period);
 989                         if (ret < 0)
 990                                 goto out_sleep;
 991                 }
 992         }
 993
 994         if (changed & BSS_CHANGED_ASSOC) {
 995                 if (bss_conf->assoc) {
 996                         wl->beacon_int = bss_conf->beacon_int;
 997
 998                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 999                         if (!skb)
1000                                 goto out_sleep;
1001
1002                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1003                                                       skb->data,
1004                                                       skb->len);
1005                         dev_kfree_skb(skb);
1006                         if (ret < 0)
1007                                 goto out_sleep;
1008
1009                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1010                         if (ret < 0)
1011                                 goto out_sleep;
1012                 } else {
1013                         /* use defaults when not associated */
1014                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1015                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1016                 }
1017         }
1018         if (changed & BSS_CHANGED_ERP_SLOT) {
1019                 if (bss_conf->use_short_slot)
1020                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1021                 else
1022                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1023                 if (ret < 0) {
1024                         wl1251_warning("Set slot time failed %d", ret);
1025                         goto out_sleep;
1026                 }
1027         }
1028
1029         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1030                 if (bss_conf->use_short_preamble)
1031                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1032                 else
1033                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1034         }
1035
1036         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1037                 if (bss_conf->use_cts_prot)
1038                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1039                 else
1040                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1041                 if (ret < 0) {
1042                         wl1251_warning("Set ctsprotect failed %d", ret);
1043                         goto out_sleep;
1044                 }
1045         }
1046
1047         if (changed & BSS_CHANGED_BEACON) {
1048                 beacon = ieee80211_beacon_get(hw, vif);
1049                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1050                                               beacon->len);
1051
1052                 if (ret < 0) {
1053                         dev_kfree_skb(beacon);
1054                         goto out_sleep;
1055                 }
1056
1057                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1058                                               beacon->len);
1059
1060                 dev_kfree_skb(beacon);
1061
1062                 if (ret < 0)
1063                         goto out_sleep;
1064
1065                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1066                                   wl->channel, wl->dtim_period);
1067
1068                 if (ret < 0)
1069                         goto out_sleep;
1070         }
1071
1072 out_sleep:
1073         wl1251_ps_elp_sleep(wl);
1074
1075 out:
1076         mutex_unlock(&wl->mutex);
1077 }
1078
1079
1080 /* can't be const, mac80211 writes to this */
1081 static struct ieee80211_rate wl1251_rates[] = {
1082         { .bitrate = 10,
1083           .hw_value = 0x1,
1084           .hw_value_short = 0x1, },
1085         { .bitrate = 20,
1086           .hw_value = 0x2,
1087           .hw_value_short = 0x2,
1088           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1089         { .bitrate = 55,
1090           .hw_value = 0x4,
1091           .hw_value_short = 0x4,
1092           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1093         { .bitrate = 110,
1094           .hw_value = 0x20,
1095           .hw_value_short = 0x20,
1096           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1097         { .bitrate = 60,
1098           .hw_value = 0x8,
1099           .hw_value_short = 0x8, },
1100         { .bitrate = 90,
1101           .hw_value = 0x10,
1102           .hw_value_short = 0x10, },
1103         { .bitrate = 120,
1104           .hw_value = 0x40,
1105           .hw_value_short = 0x40, },
1106         { .bitrate = 180,
1107           .hw_value = 0x80,
1108           .hw_value_short = 0x80, },
1109         { .bitrate = 240,
1110           .hw_value = 0x200,
1111           .hw_value_short = 0x200, },
1112         { .bitrate = 360,
1113          .hw_value = 0x400,
1114          .hw_value_short = 0x400, },
1115         { .bitrate = 480,
1116           .hw_value = 0x800,
1117           .hw_value_short = 0x800, },
1118         { .bitrate = 540,
1119           .hw_value = 0x1000,
1120           .hw_value_short = 0x1000, },
1121 };
1122
1123 /* can't be const, mac80211 writes to this */
1124 static struct ieee80211_channel wl1251_channels[] = {
1125         { .hw_value = 1, .center_freq = 2412},
1126         { .hw_value = 2, .center_freq = 2417},
1127         { .hw_value = 3, .center_freq = 2422},
1128         { .hw_value = 4, .center_freq = 2427},
1129         { .hw_value = 5, .center_freq = 2432},
1130         { .hw_value = 6, .center_freq = 2437},
1131         { .hw_value = 7, .center_freq = 2442},
1132         { .hw_value = 8, .center_freq = 2447},
1133         { .hw_value = 9, .center_freq = 2452},
1134         { .hw_value = 10, .center_freq = 2457},
1135         { .hw_value = 11, .center_freq = 2462},
1136         { .hw_value = 12, .center_freq = 2467},
1137         { .hw_value = 13, .center_freq = 2472},
1138 };
1139
1140 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1141                              const struct ieee80211_tx_queue_params *params)
1142 {
1143         enum wl1251_acx_ps_scheme ps_scheme;
1144         struct wl1251 *wl = hw->priv;
1145         int ret;
1146
1147         mutex_lock(&wl->mutex);
1148
1149         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1150
1151         ret = wl1251_ps_elp_wakeup(wl);
1152         if (ret < 0)
1153                 goto out;
1154
1155         /* mac80211 uses units of 32 usec */
1156         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1157                                 params->cw_min, params->cw_max,
1158                                 params->aifs, params->txop * 32);
1159         if (ret < 0)
1160                 goto out_sleep;
1161
1162         if (params->uapsd)
1163                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1164         else
1165                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1166
1167         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1168                                  CHANNEL_TYPE_EDCF,
1169                                  wl1251_tx_get_queue(queue), ps_scheme,
1170                                  WL1251_ACX_ACK_POLICY_LEGACY);
1171         if (ret < 0)
1172                 goto out_sleep;
1173
1174 out_sleep:
1175         wl1251_ps_elp_sleep(wl);
1176
1177 out:
1178         mutex_unlock(&wl->mutex);
1179
1180         return ret;
1181 }
1182
1183 /* can't be const, mac80211 writes to this */
1184 static struct ieee80211_supported_band wl1251_band_2ghz = {
1185         .channels = wl1251_channels,
1186         .n_channels = ARRAY_SIZE(wl1251_channels),
1187         .bitrates = wl1251_rates,
1188         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1189 };
1190
1191 static const struct ieee80211_ops wl1251_ops = {
1192         .start = wl1251_op_start,
1193         .stop = wl1251_op_stop,
1194         .add_interface = wl1251_op_add_interface,
1195         .remove_interface = wl1251_op_remove_interface,
1196         .config = wl1251_op_config,
1197         .configure_filter = wl1251_op_configure_filter,
1198         .tx = wl1251_op_tx,
1199         .set_key = wl1251_op_set_key,
1200         .hw_scan = wl1251_op_hw_scan,
1201         .bss_info_changed = wl1251_op_bss_info_changed,
1202         .set_rts_threshold = wl1251_op_set_rts_threshold,
1203         .conf_tx = wl1251_op_conf_tx,
1204 };
1205
1206 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1207 {
1208         unsigned long timeout;
1209
1210         wl1251_reg_write32(wl, EE_ADDR, offset);
1211         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1212
1213         /* EE_CTL_READ clears when data is ready */
1214         timeout = jiffies + msecs_to_jiffies(100);
1215         while (1) {
1216                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1217                         break;
1218
1219                 if (time_after(jiffies, timeout))
1220                         return -ETIMEDOUT;
1221
1222                 msleep(1);
1223         }
1224
1225         *data = wl1251_reg_read32(wl, EE_DATA);
1226         return 0;
1227 }
1228
1229 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1230                               u8 *data, size_t len)
1231 {
1232         size_t i;
1233         int ret;
1234
1235         wl1251_reg_write32(wl, EE_START, 0);
1236
1237         for (i = 0; i < len; i++) {
1238                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1239                 if (ret < 0)
1240                         return ret;
1241         }
1242
1243         return 0;
1244 }
1245
1246 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1247 {
1248         u8 mac[ETH_ALEN];
1249         int i, ret;
1250
1251         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1252
1253         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1254         if (ret < 0) {
1255                 wl1251_warning("failed to read MAC address from EEPROM");
1256                 return ret;
1257         }
1258
1259         /* MAC is stored in reverse order */
1260         for (i = 0; i < ETH_ALEN; i++)
1261                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1262
1263         return 0;
1264 }
1265
1266 static int wl1251_register_hw(struct wl1251 *wl)
1267 {
1268         int ret;
1269
1270         if (wl->mac80211_registered)
1271                 return 0;
1272
1273         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1274
1275         ret = ieee80211_register_hw(wl->hw);
1276         if (ret < 0) {
1277                 wl1251_error("unable to register mac80211 hw: %d", ret);
1278                 return ret;
1279         }
1280
1281         wl->mac80211_registered = true;
1282
1283         wl1251_notice("loaded");
1284
1285         return 0;
1286 }
1287
1288 int wl1251_init_ieee80211(struct wl1251 *wl)
1289 {
1290         int ret;
1291
1292         /* The tx descriptor buffer and the TKIP space */
1293         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1294                 + WL1251_TKIP_IV_SPACE;
1295
1296         /* unit us */
1297         /* FIXME: find a proper value */
1298         wl->hw->channel_change_time = 10000;
1299
1300         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1301                 IEEE80211_HW_NOISE_DBM |
1302                 IEEE80211_HW_SUPPORTS_PS |
1303                 IEEE80211_HW_BEACON_FILTER |
1304                 IEEE80211_HW_SUPPORTS_UAPSD;
1305
1306         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1307         wl->hw->wiphy->max_scan_ssids = 1;
1308         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1309
1310         wl->hw->queues = 4;
1311
1312         if (wl->use_eeprom)
1313                 wl1251_read_eeprom_mac(wl);
1314
1315         ret = wl1251_register_hw(wl);
1316         if (ret)
1317                 goto out;
1318
1319         wl1251_debugfs_init(wl);
1320         wl1251_notice("initialized");
1321
1322         ret = 0;
1323
1324 out:
1325         return ret;
1326 }
1327 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1328
1329 struct ieee80211_hw *wl1251_alloc_hw(void)
1330 {
1331         struct ieee80211_hw *hw;
1332         struct wl1251 *wl;
1333         int i;
1334         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1335
1336         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1337         if (!hw) {
1338                 wl1251_error("could not alloc ieee80211_hw");
1339                 return ERR_PTR(-ENOMEM);
1340         }
1341
1342         wl = hw->priv;
1343         memset(wl, 0, sizeof(*wl));
1344
1345         wl->hw = hw;
1346
1347         wl->data_in_count = 0;
1348
1349         skb_queue_head_init(&wl->tx_queue);
1350
1351         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1352         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1353         wl->channel = WL1251_DEFAULT_CHANNEL;
1354         wl->scanning = false;
1355         wl->default_key = 0;
1356         wl->listen_int = 1;
1357         wl->rx_counter = 0;
1358         wl->rx_handled = 0;
1359         wl->rx_current_buffer = 0;
1360         wl->rx_last_id = 0;
1361         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1362         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1363         wl->elp = false;
1364         wl->psm = 0;
1365         wl->psm_requested = false;
1366         wl->tx_queue_stopped = false;
1367         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1368         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1369         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1370         wl->vif = NULL;
1371
1372         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1373                 wl->tx_frames[i] = NULL;
1374
1375         wl->next_tx_complete = 0;
1376
1377         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1378         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1379
1380         /*
1381          * In case our MAC address is not correctly set,
1382          * we use a random but Nokia MAC.
1383          */
1384         memcpy(wl->mac_addr, nokia_oui, 3);
1385         get_random_bytes(wl->mac_addr + 3, 3);
1386
1387         wl->state = WL1251_STATE_OFF;
1388         mutex_init(&wl->mutex);
1389
1390         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1391         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1392
1393         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1394         if (!wl->rx_descriptor) {
1395                 wl1251_error("could not allocate memory for rx descriptor");
1396                 ieee80211_free_hw(hw);
1397                 return ERR_PTR(-ENOMEM);
1398         }
1399
1400         return hw;
1401 }
1402 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1403
1404 int wl1251_free_hw(struct wl1251 *wl)
1405 {
1406         ieee80211_unregister_hw(wl->hw);
1407
1408         wl1251_debugfs_exit(wl);
1409
1410         kfree(wl->target_mem_map);
1411         kfree(wl->data_path);
1412         vfree(wl->fw);
1413         wl->fw = NULL;
1414         kfree(wl->nvs);
1415         wl->nvs = NULL;
1416
1417         kfree(wl->rx_descriptor);
1418         wl->rx_descriptor = NULL;
1419
1420         ieee80211_free_hw(wl->hw);
1421
1422         return 0;
1423 }
1424 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1425
1426 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1427 MODULE_LICENSE("GPL");
1428 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1429 MODULE_FIRMWARE(WL1251_FW_NAME);