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          * Join command applies filters, and if we are not associated,
 339          * BSSID filter must be disabled for association to work.
 340          */
 341         if (is_zero_ether_addr(wl->bssid))
 342                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 343
 344         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 345                               dtim_period);
 346         if (ret < 0)
 347                 goto out;
 348
 349         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 350         if (ret < 0)
 351                 wl1251_warning("join timeout");
 352
 353 out:
 354         return ret;
 355 }
 356
 357 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 358 {
 359         struct wl1251 *wl = hw->priv;
 360         unsigned long flags;
 361
 362         skb_queue_tail(&wl->tx_queue, skb);
 363
 364         /*
 365          * The chip specific setup must run before the first TX packet -
 366          * before that, the tx_work will not be initialized!
 367          */
 368
 369         ieee80211_queue_work(wl->hw, &wl->tx_work);
 370
 371         /*
 372          * The workqueue is slow to process the tx_queue and we need stop
 373          * the queue here, otherwise the queue will get too long.
 374          */
 375         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 376                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 377
 378                 spin_lock_irqsave(&wl->wl_lock, flags);
 379                 ieee80211_stop_queues(wl->hw);
 380                 wl->tx_queue_stopped = true;
 381                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 382         }
 383 }
 384
 385 static int wl1251_op_start(struct ieee80211_hw *hw)
 386 {
 387         struct wl1251 *wl = hw->priv;
 388         struct wiphy *wiphy = hw->wiphy;
 389         int ret = 0;
 390
 391         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 392
 393         mutex_lock(&wl->mutex);
 394
 395         if (wl->state != WL1251_STATE_OFF) {
 396                 wl1251_error("cannot start because not in off state: %d",
 397                              wl->state);
 398                 ret = -EBUSY;
 399                 goto out;
 400         }
 401
 402         ret = wl1251_chip_wakeup(wl);
 403         if (ret < 0)
 404                 goto out;
 405
 406         ret = wl1251_boot(wl);
 407         if (ret < 0)
 408                 goto out;
 409
 410         ret = wl1251_hw_init(wl);
 411         if (ret < 0)
 412                 goto out;
 413
 414         ret = wl1251_acx_station_id(wl);
 415         if (ret < 0)
 416                 goto out;
 417
 418         wl->state = WL1251_STATE_ON;
 419
 420         wl1251_info("firmware booted (%s)", wl->fw_ver);
 421
 422         /* update hw/fw version info in wiphy struct */
 423         wiphy->hw_version = wl->chip_id;
 424         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 425
 426 out:
 427         if (ret < 0)
 428                 wl1251_power_off(wl);
 429
 430         mutex_unlock(&wl->mutex);
 431
 432         return ret;
 433 }
 434
 435 static void wl1251_op_stop(struct ieee80211_hw *hw)
 436 {
 437         struct wl1251 *wl = hw->priv;
 438
 439         wl1251_info("down");
 440
 441         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 442
 443         mutex_lock(&wl->mutex);
 444
 445         WARN_ON(wl->state != WL1251_STATE_ON);
 446
 447         if (wl->scanning) {
 448                 ieee80211_scan_completed(wl->hw, true);
 449                 wl->scanning = false;
 450         }
 451
 452         wl->state = WL1251_STATE_OFF;
 453
 454         wl1251_disable_interrupts(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         cancel_work_sync(&wl->irq_work);
 459         cancel_work_sync(&wl->tx_work);
 460         cancel_delayed_work_sync(&wl->elp_work);
 461
 462         mutex_lock(&wl->mutex);
 463
 464         /* let's notify MAC80211 about the remaining pending TX frames */
 465         wl1251_tx_flush(wl);
 466         wl1251_power_off(wl);
 467
 468         memset(wl->bssid, 0, ETH_ALEN);
 469         wl->listen_int = 1;
 470         wl->bss_type = MAX_BSS_TYPE;
 471
 472         wl->data_in_count = 0;
 473         wl->rx_counter = 0;
 474         wl->rx_handled = 0;
 475         wl->rx_current_buffer = 0;
 476         wl->rx_last_id = 0;
 477         wl->next_tx_complete = 0;
 478         wl->elp = false;
 479         wl->station_mode = STATION_ACTIVE_MODE;
 480         wl->tx_queue_stopped = false;
 481         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 482         wl->rssi_thold = 0;
 483         wl->channel = WL1251_DEFAULT_CHANNEL;
 484
 485         wl1251_debugfs_reset(wl);
 486
 487         mutex_unlock(&wl->mutex);
 488 }
 489
 490 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 491                                    struct ieee80211_vif *vif)
 492 {
 493         struct wl1251 *wl = hw->priv;
 494         int ret = 0;
 495
 496         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 497                      vif->type, vif->addr);
 498
 499         mutex_lock(&wl->mutex);
 500         if (wl->vif) {
 501                 ret = -EBUSY;
 502                 goto out;
 503         }
 504
 505         wl->vif = vif;
 506
 507         switch (vif->type) {
 508         case NL80211_IFTYPE_STATION:
 509                 wl->bss_type = BSS_TYPE_STA_BSS;
 510                 break;
 511         case NL80211_IFTYPE_ADHOC:
 512                 wl->bss_type = BSS_TYPE_IBSS;
 513                 break;
 514         default:
 515                 ret = -EOPNOTSUPP;
 516                 goto out;
 517         }
 518
 519         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 520                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 521                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 522                 ret = wl1251_acx_station_id(wl);
 523                 if (ret < 0)
 524                         goto out;
 525         }
 526
 527 out:
 528         mutex_unlock(&wl->mutex);
 529         return ret;
 530 }
 531
 532 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 533                                          struct ieee80211_vif *vif)
 534 {
 535         struct wl1251 *wl = hw->priv;
 536
 537         mutex_lock(&wl->mutex);
 538         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 539         wl->vif = NULL;
 540         mutex_unlock(&wl->mutex);
 541 }
 542
 543 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 544 {
 545         struct ieee80211_qos_hdr template;
 546
 547         memset(&template, 0, sizeof(template));
 548
 549         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 550         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 551         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 552
 553         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 554                                              IEEE80211_STYPE_QOS_NULLFUNC |
 555                                              IEEE80211_FCTL_TODS);
 556
 557         /* FIXME: not sure what priority to use here */
 558         template.qos_ctrl = cpu_to_le16(0);
 559
 560         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 561                                        sizeof(template));
 562 }
 563
 564 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 565 {
 566         struct wl1251 *wl = hw->priv;
 567         struct ieee80211_conf *conf = &hw->conf;
 568         int channel, ret = 0;
 569
 570         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 571
 572         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 573                      channel,
 574                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 575                      conf->power_level);
 576
 577         mutex_lock(&wl->mutex);
 578
 579         ret = wl1251_ps_elp_wakeup(wl);
 580         if (ret < 0)
 581                 goto out;
 582
 583         if (channel != wl->channel) {
 584                 wl->channel = channel;
 585
 586                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 587                                   wl->beacon_int, wl->dtim_period);
 588                 if (ret < 0)
 589                         goto out_sleep;
 590         }
 591
 592         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 593                 wl1251_debug(DEBUG_PSM, "psm enabled");
 594
 595                 wl->psm_requested = true;
 596
 597                 wl->dtim_period = conf->ps_dtim_period;
 598
 599                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 600                                                   wl->dtim_period);
 601
 602                 /*
 603                  * mac80211 enables PSM only if we're already associated.
 604                  */
 605                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 606                 if (ret < 0)
 607                         goto out_sleep;
 608         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 609                    wl->psm_requested) {
 610                 wl1251_debug(DEBUG_PSM, "psm disabled");
 611
 612                 wl->psm_requested = false;
 613
 614                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 615                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 616                         if (ret < 0)
 617                                 goto out_sleep;
 618                 }
 619         }
 620
 621         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 622                 if (conf->flags & IEEE80211_CONF_IDLE) {
 623                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 624                         if (ret < 0)
 625                                 goto out_sleep;
 626                 } else {
 627                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 628                         if (ret < 0)
 629                                 goto out_sleep;
 630                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 631                                           wl->beacon_int, wl->dtim_period);
 632                         if (ret < 0)
 633                                 goto out_sleep;
 634                 }
 635         }
 636
 637         if (conf->power_level != wl->power_level) {
 638                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 639                 if (ret < 0)
 640                         goto out_sleep;
 641
 642                 wl->power_level = conf->power_level;
 643         }
 644
 645 out_sleep:
 646         wl1251_ps_elp_sleep(wl);
 647
 648 out:
 649         mutex_unlock(&wl->mutex);
 650
 651         return ret;
 652 }
 653
 654 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 655                                   FIF_ALLMULTI | \
 656                                   FIF_FCSFAIL | \
 657                                   FIF_BCN_PRBRESP_PROMISC | \
 658                                   FIF_CONTROL | \
 659                                   FIF_OTHER_BSS)
 660
 661 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 662                                        unsigned int changed,
 663                                        unsigned int *total,u64 multicast)
 664 {
 665         struct wl1251 *wl = hw->priv;
 666
 667         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 668
 669         *total &= WL1251_SUPPORTED_FILTERS;
 670         changed &= WL1251_SUPPORTED_FILTERS;
 671
 672         if (changed == 0)
 673                 /* no filters which we support changed */
 674                 return;
 675
 676         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 677
 678         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 679         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 680
 681         if (*total & FIF_PROMISC_IN_BSS) {
 682                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 683                 wl->rx_config |= CFG_RX_ALL_GOOD;
 684         }
 685         if (*total & FIF_ALLMULTI)
 686                 /*
 687                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 688                  * all multicast frames
 689                  */
 690                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 691         if (*total & FIF_FCSFAIL)
 692                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 693         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 694                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 695                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 696         }
 697         if (*total & FIF_CONTROL)
 698                 wl->rx_filter |= CFG_RX_CTL_EN;
 699         if (*total & FIF_OTHER_BSS)
 700                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 701 }
 702
 703 /* HW encryption */
 704 static int wl1251_set_key_type(struct wl1251 *wl,
 705                                struct wl1251_cmd_set_keys *key,
 706                                enum set_key_cmd cmd,
 707                                struct ieee80211_key_conf *mac80211_key,
 708                                const u8 *addr)
 709 {
 710         switch (mac80211_key->cipher) {
 711         case WLAN_CIPHER_SUITE_WEP40:
 712         case WLAN_CIPHER_SUITE_WEP104:
 713                 if (is_broadcast_ether_addr(addr))
 714                         key->key_type = KEY_WEP_DEFAULT;
 715                 else
 716                         key->key_type = KEY_WEP_ADDR;
 717
 718                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 719                 break;
 720         case WLAN_CIPHER_SUITE_TKIP:
 721                 if (is_broadcast_ether_addr(addr))
 722                         key->key_type = KEY_TKIP_MIC_GROUP;
 723                 else
 724                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 725
 726                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 727                 break;
 728         case WLAN_CIPHER_SUITE_CCMP:
 729                 if (is_broadcast_ether_addr(addr))
 730                         key->key_type = KEY_AES_GROUP;
 731                 else
 732                         key->key_type = KEY_AES_PAIRWISE;
 733                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 734                 break;
 735         default:
 736                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 737                 return -EOPNOTSUPP;
 738         }
 739
 740         return 0;
 741 }
 742
 743 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 744                              struct ieee80211_vif *vif,
 745                              struct ieee80211_sta *sta,
 746                              struct ieee80211_key_conf *key)
 747 {
 748         struct wl1251 *wl = hw->priv;
 749         struct wl1251_cmd_set_keys *wl_cmd;
 750         const u8 *addr;
 751         int ret;
 752
 753         static const u8 bcast_addr[ETH_ALEN] =
 754                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 755
 756         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 757
 758         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 759         if (!wl_cmd) {
 760                 ret = -ENOMEM;
 761                 goto out;
 762         }
 763
 764         addr = sta ? sta->addr : bcast_addr;
 765
 766         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 767         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 768         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 769                      key->cipher, key->keyidx, key->keylen, key->flags);
 770         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 771
 772         if (is_zero_ether_addr(addr)) {
 773                 /* We dont support TX only encryption */
 774                 ret = -EOPNOTSUPP;
 775                 goto out;
 776         }
 777
 778         mutex_lock(&wl->mutex);
 779
 780         ret = wl1251_ps_elp_wakeup(wl);
 781         if (ret < 0)
 782                 goto out_unlock;
 783
 784         switch (cmd) {
 785         case SET_KEY:
 786                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 787                 break;
 788         case DISABLE_KEY:
 789                 wl_cmd->key_action = KEY_REMOVE;
 790                 break;
 791         default:
 792                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 793                 break;
 794         }
 795
 796         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 797         if (ret < 0) {
 798                 wl1251_error("Set KEY type failed");
 799                 goto out_sleep;
 800         }
 801
 802         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 803                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 804
 805         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 806             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 807                 /*
 808                  * We get the key in the following form:
 809                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 810                  * but the target is expecting:
 811                  * TKIP - RX MIC - TX MIC
 812                  */
 813                 memcpy(wl_cmd->key, key->key, 16);
 814                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 815                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 816
 817         } else {
 818                 memcpy(wl_cmd->key, key->key, key->keylen);
 819         }
 820         wl_cmd->key_size = key->keylen;
 821
 822         wl_cmd->id = key->keyidx;
 823         wl_cmd->ssid_profile = 0;
 824
 825         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 826
 827         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 828         if (ret < 0) {
 829                 wl1251_warning("could not set keys");
 830                 goto out_sleep;
 831         }
 832
 833 out_sleep:
 834         wl1251_ps_elp_sleep(wl);
 835
 836 out_unlock:
 837         mutex_unlock(&wl->mutex);
 838
 839 out:
 840         kfree(wl_cmd);
 841
 842         return ret;
 843 }
 844
 845 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 846                              struct ieee80211_vif *vif,
 847                              struct cfg80211_scan_request *req)
 848 {
 849         struct wl1251 *wl = hw->priv;
 850         struct sk_buff *skb;
 851         size_t ssid_len = 0;
 852         u8 *ssid = NULL;
 853         int ret;
 854
 855         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 856
 857         if (req->n_ssids) {
 858                 ssid = req->ssids[0].ssid;
 859                 ssid_len = req->ssids[0].ssid_len;
 860         }
 861
 862         mutex_lock(&wl->mutex);
 863
 864         if (wl->scanning) {
 865                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 866                 ret = -EINVAL;
 867                 goto out;
 868         }
 869
 870         ret = wl1251_ps_elp_wakeup(wl);
 871         if (ret < 0)
 872                 goto out;
 873
 874         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 875                                      req->ie, req->ie_len);
 876         if (!skb) {
 877                 ret = -ENOMEM;
 878                 goto out;
 879         }
 880
 881         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 882                                       skb->len);
 883         dev_kfree_skb(skb);
 884         if (ret < 0)
 885                 goto out_sleep;
 886
 887         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 888         if (ret < 0)
 889                 goto out_sleep;
 890
 891         wl->scanning = true;
 892
 893         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 894                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 895         if (ret < 0) {
 896                 wl->scanning = false;
 897                 goto out_sleep;
 898         }
 899
 900 out_sleep:
 901         wl1251_ps_elp_sleep(wl);
 902
 903 out:
 904         mutex_unlock(&wl->mutex);
 905
 906         return ret;
 907 }
 908
 909 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 910 {
 911         struct wl1251 *wl = hw->priv;
 912         int ret;
 913
 914         mutex_lock(&wl->mutex);
 915
 916         ret = wl1251_ps_elp_wakeup(wl);
 917         if (ret < 0)
 918                 goto out;
 919
 920         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 921         if (ret < 0)
 922                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 923
 924         wl1251_ps_elp_sleep(wl);
 925
 926 out:
 927         mutex_unlock(&wl->mutex);
 928
 929         return ret;
 930 }
 931
 932 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 933                                        struct ieee80211_vif *vif,
 934                                        struct ieee80211_bss_conf *bss_conf,
 935                                        u32 changed)
 936 {
 937         struct wl1251 *wl = hw->priv;
 938         struct sk_buff *beacon, *skb;
 939         int ret;
 940
 941         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 942
 943         mutex_lock(&wl->mutex);
 944
 945         ret = wl1251_ps_elp_wakeup(wl);
 946         if (ret < 0)
 947                 goto out;
 948
 949         if (changed & BSS_CHANGED_CQM) {
 950                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
 951                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
 952                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
 953                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
 954                 if (ret < 0)
 955                         goto out;
 956                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
 957         }
 958
 959         if (changed & BSS_CHANGED_BSSID) {
 960                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 961
 962                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 963                 if (!skb)
 964                         goto out_sleep;
 965
 966                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 967                                               skb->data, skb->len);
 968                 dev_kfree_skb(skb);
 969                 if (ret < 0)
 970                         goto out_sleep;
 971
 972                 ret = wl1251_build_qos_null_data(wl);
 973                 if (ret < 0)
 974                         goto out;
 975
 976                 if (wl->bss_type != BSS_TYPE_IBSS) {
 977                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 978                                           wl->beacon_int, wl->dtim_period);
 979                         if (ret < 0)
 980                                 goto out_sleep;
 981                 }
 982         }
 983
 984         if (changed & BSS_CHANGED_ASSOC) {
 985                 if (bss_conf->assoc) {
 986                         wl->beacon_int = bss_conf->beacon_int;
 987
 988                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 989                         if (!skb)
 990                                 goto out_sleep;
 991
 992                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 993                                                       skb->data,
 994                                                       skb->len);
 995                         dev_kfree_skb(skb);
 996                         if (ret < 0)
 997                                 goto out_sleep;
 998
 999                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1000                         if (ret < 0)
1001                                 goto out_sleep;
1002                 } else {
1003                         /* use defaults when not associated */
1004                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1005                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1006                 }
1007         }
1008         if (changed & BSS_CHANGED_ERP_SLOT) {
1009                 if (bss_conf->use_short_slot)
1010                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1011                 else
1012                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1013                 if (ret < 0) {
1014                         wl1251_warning("Set slot time failed %d", ret);
1015                         goto out_sleep;
1016                 }
1017         }
1018
1019         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1020                 if (bss_conf->use_short_preamble)
1021                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1022                 else
1023                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1024         }
1025
1026         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1027                 if (bss_conf->use_cts_prot)
1028                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1029                 else
1030                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1031                 if (ret < 0) {
1032                         wl1251_warning("Set ctsprotect failed %d", ret);
1033                         goto out_sleep;
1034                 }
1035         }
1036
1037         if (changed & BSS_CHANGED_BEACON) {
1038                 beacon = ieee80211_beacon_get(hw, vif);
1039                 if (!beacon)
1040                         goto out_sleep;
1041
1042                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1043                                               beacon->len);
1044
1045                 if (ret < 0) {
1046                         dev_kfree_skb(beacon);
1047                         goto out_sleep;
1048                 }
1049
1050                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1051                                               beacon->len);
1052
1053                 dev_kfree_skb(beacon);
1054
1055                 if (ret < 0)
1056                         goto out_sleep;
1057
1058                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1059                                   wl->channel, wl->dtim_period);
1060
1061                 if (ret < 0)
1062                         goto out_sleep;
1063         }
1064
1065 out_sleep:
1066         wl1251_ps_elp_sleep(wl);
1067
1068 out:
1069         mutex_unlock(&wl->mutex);
1070 }
1071
1072
1073 /* can't be const, mac80211 writes to this */
1074 static struct ieee80211_rate wl1251_rates[] = {
1075         { .bitrate = 10,
1076           .hw_value = 0x1,
1077           .hw_value_short = 0x1, },
1078         { .bitrate = 20,
1079           .hw_value = 0x2,
1080           .hw_value_short = 0x2,
1081           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1082         { .bitrate = 55,
1083           .hw_value = 0x4,
1084           .hw_value_short = 0x4,
1085           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1086         { .bitrate = 110,
1087           .hw_value = 0x20,
1088           .hw_value_short = 0x20,
1089           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1090         { .bitrate = 60,
1091           .hw_value = 0x8,
1092           .hw_value_short = 0x8, },
1093         { .bitrate = 90,
1094           .hw_value = 0x10,
1095           .hw_value_short = 0x10, },
1096         { .bitrate = 120,
1097           .hw_value = 0x40,
1098           .hw_value_short = 0x40, },
1099         { .bitrate = 180,
1100           .hw_value = 0x80,
1101           .hw_value_short = 0x80, },
1102         { .bitrate = 240,
1103           .hw_value = 0x200,
1104           .hw_value_short = 0x200, },
1105         { .bitrate = 360,
1106          .hw_value = 0x400,
1107          .hw_value_short = 0x400, },
1108         { .bitrate = 480,
1109           .hw_value = 0x800,
1110           .hw_value_short = 0x800, },
1111         { .bitrate = 540,
1112           .hw_value = 0x1000,
1113           .hw_value_short = 0x1000, },
1114 };
1115
1116 /* can't be const, mac80211 writes to this */
1117 static struct ieee80211_channel wl1251_channels[] = {
1118         { .hw_value = 1, .center_freq = 2412},
1119         { .hw_value = 2, .center_freq = 2417},
1120         { .hw_value = 3, .center_freq = 2422},
1121         { .hw_value = 4, .center_freq = 2427},
1122         { .hw_value = 5, .center_freq = 2432},
1123         { .hw_value = 6, .center_freq = 2437},
1124         { .hw_value = 7, .center_freq = 2442},
1125         { .hw_value = 8, .center_freq = 2447},
1126         { .hw_value = 9, .center_freq = 2452},
1127         { .hw_value = 10, .center_freq = 2457},
1128         { .hw_value = 11, .center_freq = 2462},
1129         { .hw_value = 12, .center_freq = 2467},
1130         { .hw_value = 13, .center_freq = 2472},
1131 };
1132
1133 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1134                              struct ieee80211_vif *vif, u16 queue,
1135                              const struct ieee80211_tx_queue_params *params)
1136 {
1137         enum wl1251_acx_ps_scheme ps_scheme;
1138         struct wl1251 *wl = hw->priv;
1139         int ret;
1140
1141         mutex_lock(&wl->mutex);
1142
1143         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1144
1145         ret = wl1251_ps_elp_wakeup(wl);
1146         if (ret < 0)
1147                 goto out;
1148
1149         /* mac80211 uses units of 32 usec */
1150         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1151                                 params->cw_min, params->cw_max,
1152                                 params->aifs, params->txop * 32);
1153         if (ret < 0)
1154                 goto out_sleep;
1155
1156         if (params->uapsd)
1157                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1158         else
1159                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1160
1161         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1162                                  CHANNEL_TYPE_EDCF,
1163                                  wl1251_tx_get_queue(queue), ps_scheme,
1164                                  WL1251_ACX_ACK_POLICY_LEGACY);
1165         if (ret < 0)
1166                 goto out_sleep;
1167
1168 out_sleep:
1169         wl1251_ps_elp_sleep(wl);
1170
1171 out:
1172         mutex_unlock(&wl->mutex);
1173
1174         return ret;
1175 }
1176
1177 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1178                                 struct survey_info *survey)
1179 {
1180         struct wl1251 *wl = hw->priv;
1181         struct ieee80211_conf *conf = &hw->conf;
1182
1183         if (idx != 0)
1184                 return -ENOENT;
1185
1186         survey->channel = conf->channel;
1187         survey->filled = SURVEY_INFO_NOISE_DBM;
1188         survey->noise = wl->noise;
1189
1190         return 0;
1191 }
1192
1193 /* can't be const, mac80211 writes to this */
1194 static struct ieee80211_supported_band wl1251_band_2ghz = {
1195         .channels = wl1251_channels,
1196         .n_channels = ARRAY_SIZE(wl1251_channels),
1197         .bitrates = wl1251_rates,
1198         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1199 };
1200
1201 static const struct ieee80211_ops wl1251_ops = {
1202         .start = wl1251_op_start,
1203         .stop = wl1251_op_stop,
1204         .add_interface = wl1251_op_add_interface,
1205         .remove_interface = wl1251_op_remove_interface,
1206         .config = wl1251_op_config,
1207         .configure_filter = wl1251_op_configure_filter,
1208         .tx = wl1251_op_tx,
1209         .set_key = wl1251_op_set_key,
1210         .hw_scan = wl1251_op_hw_scan,
1211         .bss_info_changed = wl1251_op_bss_info_changed,
1212         .set_rts_threshold = wl1251_op_set_rts_threshold,
1213         .conf_tx = wl1251_op_conf_tx,
1214         .get_survey = wl1251_op_get_survey,
1215 };
1216
1217 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1218 {
1219         unsigned long timeout;
1220
1221         wl1251_reg_write32(wl, EE_ADDR, offset);
1222         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1223
1224         /* EE_CTL_READ clears when data is ready */
1225         timeout = jiffies + msecs_to_jiffies(100);
1226         while (1) {
1227                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1228                         break;
1229
1230                 if (time_after(jiffies, timeout))
1231                         return -ETIMEDOUT;
1232
1233                 msleep(1);
1234         }
1235
1236         *data = wl1251_reg_read32(wl, EE_DATA);
1237         return 0;
1238 }
1239
1240 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1241                               u8 *data, size_t len)
1242 {
1243         size_t i;
1244         int ret;
1245
1246         wl1251_reg_write32(wl, EE_START, 0);
1247
1248         for (i = 0; i < len; i++) {
1249                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1250                 if (ret < 0)
1251                         return ret;
1252         }
1253
1254         return 0;
1255 }
1256
1257 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1258 {
1259         u8 mac[ETH_ALEN];
1260         int i, ret;
1261
1262         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1263
1264         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1265         if (ret < 0) {
1266                 wl1251_warning("failed to read MAC address from EEPROM");
1267                 return ret;
1268         }
1269
1270         /* MAC is stored in reverse order */
1271         for (i = 0; i < ETH_ALEN; i++)
1272                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1273
1274         return 0;
1275 }
1276
1277 static int wl1251_register_hw(struct wl1251 *wl)
1278 {
1279         int ret;
1280
1281         if (wl->mac80211_registered)
1282                 return 0;
1283
1284         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1285
1286         ret = ieee80211_register_hw(wl->hw);
1287         if (ret < 0) {
1288                 wl1251_error("unable to register mac80211 hw: %d", ret);
1289                 return ret;
1290         }
1291
1292         wl->mac80211_registered = true;
1293
1294         wl1251_notice("loaded");
1295
1296         return 0;
1297 }
1298
1299 int wl1251_init_ieee80211(struct wl1251 *wl)
1300 {
1301         int ret;
1302
1303         /* The tx descriptor buffer and the TKIP space */
1304         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1305                 + WL1251_TKIP_IV_SPACE;
1306
1307         /* unit us */
1308         /* FIXME: find a proper value */
1309         wl->hw->channel_change_time = 10000;
1310
1311         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1312                 IEEE80211_HW_SUPPORTS_PS |
1313                 IEEE80211_HW_BEACON_FILTER |
1314                 IEEE80211_HW_SUPPORTS_UAPSD |
1315                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1316
1317         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1318                                          BIT(NL80211_IFTYPE_ADHOC);
1319         wl->hw->wiphy->max_scan_ssids = 1;
1320         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1321
1322         wl->hw->queues = 4;
1323
1324         if (wl->use_eeprom)
1325                 wl1251_read_eeprom_mac(wl);
1326
1327         ret = wl1251_register_hw(wl);
1328         if (ret)
1329                 goto out;
1330
1331         wl1251_debugfs_init(wl);
1332         wl1251_notice("initialized");
1333
1334         ret = 0;
1335
1336 out:
1337         return ret;
1338 }
1339 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1340
1341 struct ieee80211_hw *wl1251_alloc_hw(void)
1342 {
1343         struct ieee80211_hw *hw;
1344         struct wl1251 *wl;
1345         int i;
1346         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1347
1348         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1349         if (!hw) {
1350                 wl1251_error("could not alloc ieee80211_hw");
1351                 return ERR_PTR(-ENOMEM);
1352         }
1353
1354         wl = hw->priv;
1355         memset(wl, 0, sizeof(*wl));
1356
1357         wl->hw = hw;
1358
1359         wl->data_in_count = 0;
1360
1361         skb_queue_head_init(&wl->tx_queue);
1362
1363         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1364         wl->channel = WL1251_DEFAULT_CHANNEL;
1365         wl->scanning = false;
1366         wl->default_key = 0;
1367         wl->listen_int = 1;
1368         wl->rx_counter = 0;
1369         wl->rx_handled = 0;
1370         wl->rx_current_buffer = 0;
1371         wl->rx_last_id = 0;
1372         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1373         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1374         wl->elp = false;
1375         wl->station_mode = STATION_ACTIVE_MODE;
1376         wl->psm_requested = false;
1377         wl->tx_queue_stopped = false;
1378         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1379         wl->rssi_thold = 0;
1380         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1381         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1382         wl->vif = NULL;
1383
1384         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1385                 wl->tx_frames[i] = NULL;
1386
1387         wl->next_tx_complete = 0;
1388
1389         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1390         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1391
1392         /*
1393          * In case our MAC address is not correctly set,
1394          * we use a random but Nokia MAC.
1395          */
1396         memcpy(wl->mac_addr, nokia_oui, 3);
1397         get_random_bytes(wl->mac_addr + 3, 3);
1398
1399         wl->state = WL1251_STATE_OFF;
1400         mutex_init(&wl->mutex);
1401
1402         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1403         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1404
1405         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1406         if (!wl->rx_descriptor) {
1407                 wl1251_error("could not allocate memory for rx descriptor");
1408                 ieee80211_free_hw(hw);
1409                 return ERR_PTR(-ENOMEM);
1410         }
1411
1412         return hw;
1413 }
1414 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1415
1416 int wl1251_free_hw(struct wl1251 *wl)
1417 {
1418         ieee80211_unregister_hw(wl->hw);
1419
1420         wl1251_debugfs_exit(wl);
1421
1422         kfree(wl->target_mem_map);
1423         kfree(wl->data_path);
1424         vfree(wl->fw);
1425         wl->fw = NULL;
1426         kfree(wl->nvs);
1427         wl->nvs = NULL;
1428
1429         kfree(wl->rx_descriptor);
1430         wl->rx_descriptor = NULL;
1431
1432         ieee80211_free_hw(wl->hw);
1433
1434         return 0;
1435 }
1436 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1437
1438 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1439 MODULE_LICENSE("GPL");
1440 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1441 MODULE_FIRMWARE(WL1251_FW_NAME);