drivers/net/wireless/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "reg.h"
  35 #include "io.h"
  36 #include "cmd.h"
  37 #include "event.h"
  38 #include "tx.h"
  39 #include "rx.h"
  40 #include "ps.h"
  41 #include "init.h"
  42 #include "debugfs.h"
  43 #include "boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static int wl1251_power_off(struct wl1251 *wl)
  56 {
  57         return wl->if_ops->power(wl, false);
  58 }
  59
  60 static int wl1251_power_on(struct wl1251 *wl)
  61 {
  62         return wl->if_ops->power(wl, true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = vmalloc(wl->fw_len);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         ret = 0;
 134
 135 out:
 136         release_firmware(fw);
 137
 138         return ret;
 139 }
 140
 141 static void wl1251_fw_wakeup(struct wl1251 *wl)
 142 {
 143         u32 elp_reg;
 144
 145         elp_reg = ELPCTRL_WAKE_UP;
 146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 148
 149         if (!(elp_reg & ELPCTRL_WLAN_READY))
 150                 wl1251_warning("WLAN not ready");
 151 }
 152
 153 static int wl1251_chip_wakeup(struct wl1251 *wl)
 154 {
 155         int ret;
 156
 157         ret = wl1251_power_on(wl);
 158         if (ret < 0)
 159                 return ret;
 160
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         if (wl->nvs == NULL && !wl->use_eeprom) {
 205                 /* No NVS from netlink, try to get it from the filesystem */
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 10
 216 static void wl1251_irq_work(struct work_struct *work)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl =
 220                 container_of(work, struct wl1251, irq_work);
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 if (--ctr == 0)
 312                         break;
 313
 314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 315         } while (intr);
 316
 317 out_sleep:
 318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 319         wl1251_ps_elp_sleep(wl);
 320
 321 out:
 322         mutex_unlock(&wl->mutex);
 323 }
 324
 325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 326                        u16 beacon_interval, u8 dtim_period)
 327 {
 328         int ret;
 329
 330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 332                                      wl->tx_mgmt_frm_rate,
 333                                      wl->tx_mgmt_frm_mod);
 334         if (ret < 0)
 335                 goto out;
 336
 337
 338         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 339                               dtim_period);
 340         if (ret < 0)
 341                 goto out;
 342
 343         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 344         if (ret < 0)
 345                 wl1251_warning("join timeout");
 346
 347 out:
 348         return ret;
 349 }
 350
 351 static void wl1251_filter_work(struct work_struct *work)
 352 {
 353         struct wl1251 *wl =
 354                 container_of(work, struct wl1251, filter_work);
 355         int ret;
 356
 357         mutex_lock(&wl->mutex);
 358
 359         if (wl->state == WL1251_STATE_OFF)
 360                 goto out;
 361
 362         ret = wl1251_ps_elp_wakeup(wl);
 363         if (ret < 0)
 364                 goto out;
 365
 366         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 367                           wl->dtim_period);
 368         if (ret < 0)
 369                 goto out_sleep;
 370
 371 out_sleep:
 372         wl1251_ps_elp_sleep(wl);
 373
 374 out:
 375         mutex_unlock(&wl->mutex);
 376 }
 377
 378 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 379 {
 380         struct wl1251 *wl = hw->priv;
 381         unsigned long flags;
 382
 383         skb_queue_tail(&wl->tx_queue, skb);
 384
 385         /*
 386          * The chip specific setup must run before the first TX packet -
 387          * before that, the tx_work will not be initialized!
 388          */
 389
 390         ieee80211_queue_work(wl->hw, &wl->tx_work);
 391
 392         /*
 393          * The workqueue is slow to process the tx_queue and we need stop
 394          * the queue here, otherwise the queue will get too long.
 395          */
 396         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 397                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 398
 399                 spin_lock_irqsave(&wl->wl_lock, flags);
 400                 ieee80211_stop_queues(wl->hw);
 401                 wl->tx_queue_stopped = true;
 402                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 403         }
 404
 405         return NETDEV_TX_OK;
 406 }
 407
 408 static int wl1251_op_start(struct ieee80211_hw *hw)
 409 {
 410         struct wl1251 *wl = hw->priv;
 411         struct wiphy *wiphy = hw->wiphy;
 412         int ret = 0;
 413
 414         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 415
 416         mutex_lock(&wl->mutex);
 417
 418         if (wl->state != WL1251_STATE_OFF) {
 419                 wl1251_error("cannot start because not in off state: %d",
 420                              wl->state);
 421                 ret = -EBUSY;
 422                 goto out;
 423         }
 424
 425         ret = wl1251_chip_wakeup(wl);
 426         if (ret < 0)
 427                 goto out;
 428
 429         ret = wl1251_boot(wl);
 430         if (ret < 0)
 431                 goto out;
 432
 433         ret = wl1251_hw_init(wl);
 434         if (ret < 0)
 435                 goto out;
 436
 437         ret = wl1251_acx_station_id(wl);
 438         if (ret < 0)
 439                 goto out;
 440
 441         wl->state = WL1251_STATE_ON;
 442
 443         wl1251_info("firmware booted (%s)", wl->fw_ver);
 444
 445         /* update hw/fw version info in wiphy struct */
 446         wiphy->hw_version = wl->chip_id;
 447         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 448
 449 out:
 450         if (ret < 0)
 451                 wl1251_power_off(wl);
 452
 453         mutex_unlock(&wl->mutex);
 454
 455         return ret;
 456 }
 457
 458 static void wl1251_op_stop(struct ieee80211_hw *hw)
 459 {
 460         struct wl1251 *wl = hw->priv;
 461
 462         wl1251_info("down");
 463
 464         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 465
 466         mutex_lock(&wl->mutex);
 467
 468         WARN_ON(wl->state != WL1251_STATE_ON);
 469
 470         if (wl->scanning) {
 471                 ieee80211_scan_completed(wl->hw, true);
 472                 wl->scanning = false;
 473         }
 474
 475         wl->state = WL1251_STATE_OFF;
 476
 477         wl1251_disable_interrupts(wl);
 478
 479         mutex_unlock(&wl->mutex);
 480
 481         cancel_work_sync(&wl->irq_work);
 482         cancel_work_sync(&wl->tx_work);
 483         cancel_work_sync(&wl->filter_work);
 484
 485         mutex_lock(&wl->mutex);
 486
 487         /* let's notify MAC80211 about the remaining pending TX frames */
 488         wl1251_tx_flush(wl);
 489         wl1251_power_off(wl);
 490
 491         memset(wl->bssid, 0, ETH_ALEN);
 492         wl->listen_int = 1;
 493         wl->bss_type = MAX_BSS_TYPE;
 494
 495         wl->data_in_count = 0;
 496         wl->rx_counter = 0;
 497         wl->rx_handled = 0;
 498         wl->rx_current_buffer = 0;
 499         wl->rx_last_id = 0;
 500         wl->next_tx_complete = 0;
 501         wl->elp = false;
 502         wl->psm = 0;
 503         wl->tx_queue_stopped = false;
 504         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 505         wl->rssi_thold = 0;
 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_build_qos_null_data(struct wl1251 *wl)
 567 {
 568         struct ieee80211_qos_hdr template;
 569
 570         memset(&template, 0, sizeof(template));
 571
 572         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 573         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 574         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 575
 576         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 577                                              IEEE80211_STYPE_QOS_NULLFUNC |
 578                                              IEEE80211_FCTL_TODS);
 579
 580         /* FIXME: not sure what priority to use here */
 581         template.qos_ctrl = cpu_to_le16(0);
 582
 583         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 584                                        sizeof(template));
 585 }
 586
 587 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 588 {
 589         struct wl1251 *wl = hw->priv;
 590         struct ieee80211_conf *conf = &hw->conf;
 591         int channel, ret = 0;
 592
 593         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 594
 595         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 596                      channel,
 597                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 598                      conf->power_level);
 599
 600         mutex_lock(&wl->mutex);
 601
 602         ret = wl1251_ps_elp_wakeup(wl);
 603         if (ret < 0)
 604                 goto out;
 605
 606         if (channel != wl->channel) {
 607                 wl->channel = channel;
 608
 609                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 610                                   wl->beacon_int, wl->dtim_period);
 611                 if (ret < 0)
 612                         goto out_sleep;
 613         }
 614
 615         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 616                 wl1251_debug(DEBUG_PSM, "psm enabled");
 617
 618                 wl->psm_requested = true;
 619
 620                 wl->dtim_period = conf->ps_dtim_period;
 621
 622                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 623                                                   wl->dtim_period);
 624
 625                 /*
 626                  * mac80211 enables PSM only if we're already associated.
 627                  */
 628                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 629                 if (ret < 0)
 630                         goto out_sleep;
 631         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 632                    wl->psm_requested) {
 633                 wl1251_debug(DEBUG_PSM, "psm disabled");
 634
 635                 wl->psm_requested = false;
 636
 637                 if (wl->psm) {
 638                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 639                         if (ret < 0)
 640                                 goto out_sleep;
 641                 }
 642         }
 643
 644         if (conf->power_level != wl->power_level) {
 645                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 646                 if (ret < 0)
 647                         goto out_sleep;
 648
 649                 wl->power_level = conf->power_level;
 650         }
 651
 652 out_sleep:
 653         wl1251_ps_elp_sleep(wl);
 654
 655 out:
 656         mutex_unlock(&wl->mutex);
 657
 658         return ret;
 659 }
 660
 661 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 662                                   FIF_ALLMULTI | \
 663                                   FIF_FCSFAIL | \
 664                                   FIF_BCN_PRBRESP_PROMISC | \
 665                                   FIF_CONTROL | \
 666                                   FIF_OTHER_BSS)
 667
 668 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 669                                        unsigned int changed,
 670                                        unsigned int *total,u64 multicast)
 671 {
 672         struct wl1251 *wl = hw->priv;
 673
 674         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 675
 676         *total &= WL1251_SUPPORTED_FILTERS;
 677         changed &= WL1251_SUPPORTED_FILTERS;
 678
 679         if (changed == 0)
 680                 /* no filters which we support changed */
 681                 return;
 682
 683         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 684
 685         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 686         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 687
 688         if (*total & FIF_PROMISC_IN_BSS) {
 689                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 690                 wl->rx_config |= CFG_RX_ALL_GOOD;
 691         }
 692         if (*total & FIF_ALLMULTI)
 693                 /*
 694                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 695                  * all multicast frames
 696                  */
 697                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 698         if (*total & FIF_FCSFAIL)
 699                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 700         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 701                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 702                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 703         }
 704         if (*total & FIF_CONTROL)
 705                 wl->rx_filter |= CFG_RX_CTL_EN;
 706         if (*total & FIF_OTHER_BSS)
 707                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 708
 709         /*
 710          * FIXME: workqueues need to be properly cancelled on stop(), for
 711          * now let's just disable changing the filter settings. They will
 712          * be updated any on config().
 713          */
 714         /* schedule_work(&wl->filter_work); */
 715 }
 716
 717 /* HW encryption */
 718 static int wl1251_set_key_type(struct wl1251 *wl,
 719                                struct wl1251_cmd_set_keys *key,
 720                                enum set_key_cmd cmd,
 721                                struct ieee80211_key_conf *mac80211_key,
 722                                const u8 *addr)
 723 {
 724         switch (mac80211_key->cipher) {
 725         case WLAN_CIPHER_SUITE_WEP40:
 726         case WLAN_CIPHER_SUITE_WEP104:
 727                 if (is_broadcast_ether_addr(addr))
 728                         key->key_type = KEY_WEP_DEFAULT;
 729                 else
 730                         key->key_type = KEY_WEP_ADDR;
 731
 732                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 733                 break;
 734         case WLAN_CIPHER_SUITE_TKIP:
 735                 if (is_broadcast_ether_addr(addr))
 736                         key->key_type = KEY_TKIP_MIC_GROUP;
 737                 else
 738                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 739
 740                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 741                 break;
 742         case WLAN_CIPHER_SUITE_CCMP:
 743                 if (is_broadcast_ether_addr(addr))
 744                         key->key_type = KEY_AES_GROUP;
 745                 else
 746                         key->key_type = KEY_AES_PAIRWISE;
 747                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 748                 break;
 749         default:
 750                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 751                 return -EOPNOTSUPP;
 752         }
 753
 754         return 0;
 755 }
 756
 757 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 758                              struct ieee80211_vif *vif,
 759                              struct ieee80211_sta *sta,
 760                              struct ieee80211_key_conf *key)
 761 {
 762         struct wl1251 *wl = hw->priv;
 763         struct wl1251_cmd_set_keys *wl_cmd;
 764         const u8 *addr;
 765         int ret;
 766
 767         static const u8 bcast_addr[ETH_ALEN] =
 768                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 769
 770         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 771
 772         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 773         if (!wl_cmd) {
 774                 ret = -ENOMEM;
 775                 goto out;
 776         }
 777
 778         addr = sta ? sta->addr : bcast_addr;
 779
 780         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 781         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 782         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 783                      key->cipher, key->keyidx, key->keylen, key->flags);
 784         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 785
 786         if (is_zero_ether_addr(addr)) {
 787                 /* We dont support TX only encryption */
 788                 ret = -EOPNOTSUPP;
 789                 goto out;
 790         }
 791
 792         mutex_lock(&wl->mutex);
 793
 794         ret = wl1251_ps_elp_wakeup(wl);
 795         if (ret < 0)
 796                 goto out_unlock;
 797
 798         switch (cmd) {
 799         case SET_KEY:
 800                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 801                 break;
 802         case DISABLE_KEY:
 803                 wl_cmd->key_action = KEY_REMOVE;
 804                 break;
 805         default:
 806                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 807                 break;
 808         }
 809
 810         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 811         if (ret < 0) {
 812                 wl1251_error("Set KEY type failed");
 813                 goto out_sleep;
 814         }
 815
 816         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 817                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 818
 819         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 820             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 821                 /*
 822                  * We get the key in the following form:
 823                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 824                  * but the target is expecting:
 825                  * TKIP - RX MIC - TX MIC
 826                  */
 827                 memcpy(wl_cmd->key, key->key, 16);
 828                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 829                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 830
 831         } else {
 832                 memcpy(wl_cmd->key, key->key, key->keylen);
 833         }
 834         wl_cmd->key_size = key->keylen;
 835
 836         wl_cmd->id = key->keyidx;
 837         wl_cmd->ssid_profile = 0;
 838
 839         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 840
 841         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 842         if (ret < 0) {
 843                 wl1251_warning("could not set keys");
 844                 goto out_sleep;
 845         }
 846
 847 out_sleep:
 848         wl1251_ps_elp_sleep(wl);
 849
 850 out_unlock:
 851         mutex_unlock(&wl->mutex);
 852
 853 out:
 854         kfree(wl_cmd);
 855
 856         return ret;
 857 }
 858
 859 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 860                              struct ieee80211_vif *vif,
 861                              struct cfg80211_scan_request *req)
 862 {
 863         struct wl1251 *wl = hw->priv;
 864         struct sk_buff *skb;
 865         size_t ssid_len = 0;
 866         u8 *ssid = NULL;
 867         int ret;
 868
 869         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 870
 871         if (req->n_ssids) {
 872                 ssid = req->ssids[0].ssid;
 873                 ssid_len = req->ssids[0].ssid_len;
 874         }
 875
 876         mutex_lock(&wl->mutex);
 877
 878         if (wl->scanning) {
 879                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 880                 ret = -EINVAL;
 881                 goto out;
 882         }
 883
 884         ret = wl1251_ps_elp_wakeup(wl);
 885         if (ret < 0)
 886                 goto out;
 887
 888         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 889                                      req->ie, req->ie_len);
 890         if (!skb) {
 891                 ret = -ENOMEM;
 892                 goto out;
 893         }
 894
 895         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 896                                       skb->len);
 897         dev_kfree_skb(skb);
 898         if (ret < 0)
 899                 goto out_sleep;
 900
 901         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 902         if (ret < 0)
 903                 goto out_sleep;
 904
 905         wl->scanning = true;
 906
 907         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 908                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 909         if (ret < 0) {
 910                 wl->scanning = false;
 911                 goto out_sleep;
 912         }
 913
 914 out_sleep:
 915         wl1251_ps_elp_sleep(wl);
 916
 917 out:
 918         mutex_unlock(&wl->mutex);
 919
 920         return ret;
 921 }
 922
 923 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 924 {
 925         struct wl1251 *wl = hw->priv;
 926         int ret;
 927
 928         mutex_lock(&wl->mutex);
 929
 930         ret = wl1251_ps_elp_wakeup(wl);
 931         if (ret < 0)
 932                 goto out;
 933
 934         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 935         if (ret < 0)
 936                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 937
 938         wl1251_ps_elp_sleep(wl);
 939
 940 out:
 941         mutex_unlock(&wl->mutex);
 942
 943         return ret;
 944 }
 945
 946 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 947                                        struct ieee80211_vif *vif,
 948                                        struct ieee80211_bss_conf *bss_conf,
 949                                        u32 changed)
 950 {
 951         struct wl1251 *wl = hw->priv;
 952         struct sk_buff *beacon, *skb;
 953         int ret;
 954
 955         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 956
 957         mutex_lock(&wl->mutex);
 958
 959         ret = wl1251_ps_elp_wakeup(wl);
 960         if (ret < 0)
 961                 goto out;
 962
 963         if (changed & BSS_CHANGED_CQM) {
 964                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
 965                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
 966                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
 967                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
 968                 if (ret < 0)
 969                         goto out;
 970                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
 971         }
 972
 973         if (changed & BSS_CHANGED_BSSID) {
 974                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 975
 976                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 977                 if (!skb)
 978                         goto out_sleep;
 979
 980                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 981                                               skb->data, skb->len);
 982                 dev_kfree_skb(skb);
 983                 if (ret < 0)
 984                         goto out_sleep;
 985
 986                 ret = wl1251_build_qos_null_data(wl);
 987                 if (ret < 0)
 988                         goto out;
 989
 990                 if (wl->bss_type != BSS_TYPE_IBSS) {
 991                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 992                                           wl->beacon_int, wl->dtim_period);
 993                         if (ret < 0)
 994                                 goto out_sleep;
 995                 }
 996         }
 997
 998         if (changed & BSS_CHANGED_ASSOC) {
 999                 if (bss_conf->assoc) {
1000                         wl->beacon_int = bss_conf->beacon_int;
1001
1002                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1003                         if (!skb)
1004                                 goto out_sleep;
1005
1006                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1007                                                       skb->data,
1008                                                       skb->len);
1009                         dev_kfree_skb(skb);
1010                         if (ret < 0)
1011                                 goto out_sleep;
1012
1013                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1014                         if (ret < 0)
1015                                 goto out_sleep;
1016                 } else {
1017                         /* use defaults when not associated */
1018                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1019                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1020                 }
1021         }
1022         if (changed & BSS_CHANGED_ERP_SLOT) {
1023                 if (bss_conf->use_short_slot)
1024                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1025                 else
1026                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1027                 if (ret < 0) {
1028                         wl1251_warning("Set slot time failed %d", ret);
1029                         goto out_sleep;
1030                 }
1031         }
1032
1033         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1034                 if (bss_conf->use_short_preamble)
1035                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1036                 else
1037                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1038         }
1039
1040         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1041                 if (bss_conf->use_cts_prot)
1042                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1043                 else
1044                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1045                 if (ret < 0) {
1046                         wl1251_warning("Set ctsprotect failed %d", ret);
1047                         goto out_sleep;
1048                 }
1049         }
1050
1051         if (changed & BSS_CHANGED_BEACON) {
1052                 beacon = ieee80211_beacon_get(hw, vif);
1053                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1054                                               beacon->len);
1055
1056                 if (ret < 0) {
1057                         dev_kfree_skb(beacon);
1058                         goto out_sleep;
1059                 }
1060
1061                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1062                                               beacon->len);
1063
1064                 dev_kfree_skb(beacon);
1065
1066                 if (ret < 0)
1067                         goto out_sleep;
1068
1069                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1070                                   wl->channel, wl->dtim_period);
1071
1072                 if (ret < 0)
1073                         goto out_sleep;
1074         }
1075
1076 out_sleep:
1077         wl1251_ps_elp_sleep(wl);
1078
1079 out:
1080         mutex_unlock(&wl->mutex);
1081 }
1082
1083
1084 /* can't be const, mac80211 writes to this */
1085 static struct ieee80211_rate wl1251_rates[] = {
1086         { .bitrate = 10,
1087           .hw_value = 0x1,
1088           .hw_value_short = 0x1, },
1089         { .bitrate = 20,
1090           .hw_value = 0x2,
1091           .hw_value_short = 0x2,
1092           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1093         { .bitrate = 55,
1094           .hw_value = 0x4,
1095           .hw_value_short = 0x4,
1096           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1097         { .bitrate = 110,
1098           .hw_value = 0x20,
1099           .hw_value_short = 0x20,
1100           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1101         { .bitrate = 60,
1102           .hw_value = 0x8,
1103           .hw_value_short = 0x8, },
1104         { .bitrate = 90,
1105           .hw_value = 0x10,
1106           .hw_value_short = 0x10, },
1107         { .bitrate = 120,
1108           .hw_value = 0x40,
1109           .hw_value_short = 0x40, },
1110         { .bitrate = 180,
1111           .hw_value = 0x80,
1112           .hw_value_short = 0x80, },
1113         { .bitrate = 240,
1114           .hw_value = 0x200,
1115           .hw_value_short = 0x200, },
1116         { .bitrate = 360,
1117          .hw_value = 0x400,
1118          .hw_value_short = 0x400, },
1119         { .bitrate = 480,
1120           .hw_value = 0x800,
1121           .hw_value_short = 0x800, },
1122         { .bitrate = 540,
1123           .hw_value = 0x1000,
1124           .hw_value_short = 0x1000, },
1125 };
1126
1127 /* can't be const, mac80211 writes to this */
1128 static struct ieee80211_channel wl1251_channels[] = {
1129         { .hw_value = 1, .center_freq = 2412},
1130         { .hw_value = 2, .center_freq = 2417},
1131         { .hw_value = 3, .center_freq = 2422},
1132         { .hw_value = 4, .center_freq = 2427},
1133         { .hw_value = 5, .center_freq = 2432},
1134         { .hw_value = 6, .center_freq = 2437},
1135         { .hw_value = 7, .center_freq = 2442},
1136         { .hw_value = 8, .center_freq = 2447},
1137         { .hw_value = 9, .center_freq = 2452},
1138         { .hw_value = 10, .center_freq = 2457},
1139         { .hw_value = 11, .center_freq = 2462},
1140         { .hw_value = 12, .center_freq = 2467},
1141         { .hw_value = 13, .center_freq = 2472},
1142 };
1143
1144 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1145                              const struct ieee80211_tx_queue_params *params)
1146 {
1147         enum wl1251_acx_ps_scheme ps_scheme;
1148         struct wl1251 *wl = hw->priv;
1149         int ret;
1150
1151         mutex_lock(&wl->mutex);
1152
1153         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1154
1155         ret = wl1251_ps_elp_wakeup(wl);
1156         if (ret < 0)
1157                 goto out;
1158
1159         /* mac80211 uses units of 32 usec */
1160         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1161                                 params->cw_min, params->cw_max,
1162                                 params->aifs, params->txop * 32);
1163         if (ret < 0)
1164                 goto out_sleep;
1165
1166         if (params->uapsd)
1167                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1168         else
1169                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1170
1171         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1172                                  CHANNEL_TYPE_EDCF,
1173                                  wl1251_tx_get_queue(queue), ps_scheme,
1174                                  WL1251_ACX_ACK_POLICY_LEGACY);
1175         if (ret < 0)
1176                 goto out_sleep;
1177
1178 out_sleep:
1179         wl1251_ps_elp_sleep(wl);
1180
1181 out:
1182         mutex_unlock(&wl->mutex);
1183
1184         return ret;
1185 }
1186
1187 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1188                                 struct survey_info *survey)
1189 {
1190         struct wl1251 *wl = hw->priv;
1191         struct ieee80211_conf *conf = &hw->conf;
1192
1193         if (idx != 0)
1194                 return -ENOENT;
1195
1196         survey->channel = conf->channel;
1197         survey->filled = SURVEY_INFO_NOISE_DBM;
1198         survey->noise = wl->noise;
1199
1200         return 0;
1201 }
1202
1203 /* can't be const, mac80211 writes to this */
1204 static struct ieee80211_supported_band wl1251_band_2ghz = {
1205         .channels = wl1251_channels,
1206         .n_channels = ARRAY_SIZE(wl1251_channels),
1207         .bitrates = wl1251_rates,
1208         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1209 };
1210
1211 static const struct ieee80211_ops wl1251_ops = {
1212         .start = wl1251_op_start,
1213         .stop = wl1251_op_stop,
1214         .add_interface = wl1251_op_add_interface,
1215         .remove_interface = wl1251_op_remove_interface,
1216         .config = wl1251_op_config,
1217         .configure_filter = wl1251_op_configure_filter,
1218         .tx = wl1251_op_tx,
1219         .set_key = wl1251_op_set_key,
1220         .hw_scan = wl1251_op_hw_scan,
1221         .bss_info_changed = wl1251_op_bss_info_changed,
1222         .set_rts_threshold = wl1251_op_set_rts_threshold,
1223         .conf_tx = wl1251_op_conf_tx,
1224         .get_survey = wl1251_op_get_survey,
1225 };
1226
1227 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1228 {
1229         unsigned long timeout;
1230
1231         wl1251_reg_write32(wl, EE_ADDR, offset);
1232         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1233
1234         /* EE_CTL_READ clears when data is ready */
1235         timeout = jiffies + msecs_to_jiffies(100);
1236         while (1) {
1237                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1238                         break;
1239
1240                 if (time_after(jiffies, timeout))
1241                         return -ETIMEDOUT;
1242
1243                 msleep(1);
1244         }
1245
1246         *data = wl1251_reg_read32(wl, EE_DATA);
1247         return 0;
1248 }
1249
1250 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1251                               u8 *data, size_t len)
1252 {
1253         size_t i;
1254         int ret;
1255
1256         wl1251_reg_write32(wl, EE_START, 0);
1257
1258         for (i = 0; i < len; i++) {
1259                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1260                 if (ret < 0)
1261                         return ret;
1262         }
1263
1264         return 0;
1265 }
1266
1267 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1268 {
1269         u8 mac[ETH_ALEN];
1270         int i, ret;
1271
1272         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1273
1274         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1275         if (ret < 0) {
1276                 wl1251_warning("failed to read MAC address from EEPROM");
1277                 return ret;
1278         }
1279
1280         /* MAC is stored in reverse order */
1281         for (i = 0; i < ETH_ALEN; i++)
1282                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1283
1284         return 0;
1285 }
1286
1287 static int wl1251_register_hw(struct wl1251 *wl)
1288 {
1289         int ret;
1290
1291         if (wl->mac80211_registered)
1292                 return 0;
1293
1294         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1295
1296         ret = ieee80211_register_hw(wl->hw);
1297         if (ret < 0) {
1298                 wl1251_error("unable to register mac80211 hw: %d", ret);
1299                 return ret;
1300         }
1301
1302         wl->mac80211_registered = true;
1303
1304         wl1251_notice("loaded");
1305
1306         return 0;
1307 }
1308
1309 int wl1251_init_ieee80211(struct wl1251 *wl)
1310 {
1311         int ret;
1312
1313         /* The tx descriptor buffer and the TKIP space */
1314         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1315                 + WL1251_TKIP_IV_SPACE;
1316
1317         /* unit us */
1318         /* FIXME: find a proper value */
1319         wl->hw->channel_change_time = 10000;
1320
1321         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1322                 IEEE80211_HW_SUPPORTS_PS |
1323                 IEEE80211_HW_BEACON_FILTER |
1324                 IEEE80211_HW_SUPPORTS_UAPSD |
1325                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1326
1327         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1328         wl->hw->wiphy->max_scan_ssids = 1;
1329         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1330
1331         wl->hw->queues = 4;
1332
1333         if (wl->use_eeprom)
1334                 wl1251_read_eeprom_mac(wl);
1335
1336         ret = wl1251_register_hw(wl);
1337         if (ret)
1338                 goto out;
1339
1340         wl1251_debugfs_init(wl);
1341         wl1251_notice("initialized");
1342
1343         ret = 0;
1344
1345 out:
1346         return ret;
1347 }
1348 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1349
1350 struct ieee80211_hw *wl1251_alloc_hw(void)
1351 {
1352         struct ieee80211_hw *hw;
1353         struct wl1251 *wl;
1354         int i;
1355         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1356
1357         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1358         if (!hw) {
1359                 wl1251_error("could not alloc ieee80211_hw");
1360                 return ERR_PTR(-ENOMEM);
1361         }
1362
1363         wl = hw->priv;
1364         memset(wl, 0, sizeof(*wl));
1365
1366         wl->hw = hw;
1367
1368         wl->data_in_count = 0;
1369
1370         skb_queue_head_init(&wl->tx_queue);
1371
1372         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1373         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1374         wl->channel = WL1251_DEFAULT_CHANNEL;
1375         wl->scanning = false;
1376         wl->default_key = 0;
1377         wl->listen_int = 1;
1378         wl->rx_counter = 0;
1379         wl->rx_handled = 0;
1380         wl->rx_current_buffer = 0;
1381         wl->rx_last_id = 0;
1382         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1383         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1384         wl->elp = false;
1385         wl->psm = 0;
1386         wl->psm_requested = false;
1387         wl->tx_queue_stopped = false;
1388         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1389         wl->rssi_thold = 0;
1390         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1391         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1392         wl->vif = NULL;
1393
1394         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1395                 wl->tx_frames[i] = NULL;
1396
1397         wl->next_tx_complete = 0;
1398
1399         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1400         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1401
1402         /*
1403          * In case our MAC address is not correctly set,
1404          * we use a random but Nokia MAC.
1405          */
1406         memcpy(wl->mac_addr, nokia_oui, 3);
1407         get_random_bytes(wl->mac_addr + 3, 3);
1408
1409         wl->state = WL1251_STATE_OFF;
1410         mutex_init(&wl->mutex);
1411
1412         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1413         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1414
1415         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1416         if (!wl->rx_descriptor) {
1417                 wl1251_error("could not allocate memory for rx descriptor");
1418                 ieee80211_free_hw(hw);
1419                 return ERR_PTR(-ENOMEM);
1420         }
1421
1422         return hw;
1423 }
1424 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1425
1426 int wl1251_free_hw(struct wl1251 *wl)
1427 {
1428         ieee80211_unregister_hw(wl->hw);
1429
1430         wl1251_debugfs_exit(wl);
1431
1432         kfree(wl->target_mem_map);
1433         kfree(wl->data_path);
1434         vfree(wl->fw);
1435         wl->fw = NULL;
1436         kfree(wl->nvs);
1437         wl->nvs = NULL;
1438
1439         kfree(wl->rx_descriptor);
1440         wl->rx_descriptor = NULL;
1441
1442         ieee80211_free_hw(wl->hw);
1443
1444         return 0;
1445 }
1446 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1447
1448 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1449 MODULE_LICENSE("GPL");
1450 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1451 MODULE_FIRMWARE(WL1251_FW_NAME);