drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #if (LINUX_VERSION_CODE == KERNEL_VERSION(2,6,28))
  30 #include <linux/device.h>
  31 #endif
  32 #include <linux/crc32.h>
  33 #include <linux/etherdevice.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include "wl1251.h"
  37 #include "wl12xx_80211.h"
  38 #include "wl1251_reg.h"
  39 #include "wl1251_io.h"
  40 #include "wl1251_cmd.h"
  41 #include "wl1251_event.h"
  42 #include "wl1251_tx.h"
  43 #include "wl1251_rx.h"
  44 #include "wl1251_ps.h"
  45 #include "wl1251_init.h"
  46 #include "wl1251_debugfs.h"
  47 #include "wl1251_boot.h"
  48
  49 void wl1251_enable_interrupts(struct wl1251 *wl)
  50 {
  51         wl->if_ops->enable_irq(wl);
  52 }
  53
  54 void wl1251_disable_interrupts(struct wl1251 *wl)
  55 {
  56         wl->if_ops->disable_irq(wl);
  57 }
  58
  59 static void wl1251_power_off(struct wl1251 *wl)
  60 {
  61         wl->set_power(false);
  62 }
  63
  64 static void wl1251_power_on(struct wl1251 *wl)
  65 {
  66         wl->set_power(true);
  67 }
  68
  69 static int wl1251_fetch_firmware(struct wl1251 *wl)
  70 {
  71         const struct firmware *fw;
  72         struct device *dev = wiphy_dev(wl->hw->wiphy);
  73         int ret;
  74
  75         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  76
  77         if (ret < 0) {
  78                 wl1251_error("could not get firmware: %d", ret);
  79                 return ret;
  80         }
  81
  82         if (fw->size % 4) {
  83                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  84                              fw->size);
  85                 ret = -EILSEQ;
  86                 goto out;
  87         }
  88
  89         wl->fw_len = fw->size;
  90         wl->fw = vmalloc(wl->fw_len);
  91
  92         if (!wl->fw) {
  93                 wl1251_error("could not allocate memory for the firmware");
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97
  98         memcpy(wl->fw, fw->data, wl->fw_len);
  99
 100         ret = 0;
 101
 102 out:
 103         release_firmware(fw);
 104
 105         return ret;
 106 }
 107
 108 static int wl1251_fetch_nvs(struct wl1251 *wl)
 109 {
 110         const struct firmware *fw;
 111         struct device *dev = wiphy_dev(wl->hw->wiphy);
 112         int ret;
 113
 114         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 115
 116         if (ret < 0) {
 117                 wl1251_error("could not get nvs file: %d", ret);
 118                 return ret;
 119         }
 120
 121         if (fw->size % 4) {
 122                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 123                              fw->size);
 124                 ret = -EILSEQ;
 125                 goto out;
 126         }
 127
 128         wl->nvs_len = fw->size;
 129         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 130
 131         if (!wl->nvs) {
 132                 wl1251_error("could not allocate memory for the nvs file");
 133                 ret = -ENOMEM;
 134                 goto out;
 135         }
 136
 137         memcpy(wl->nvs, fw->data, wl->nvs_len);
 138
 139         ret = 0;
 140
 141 out:
 142         release_firmware(fw);
 143
 144         return ret;
 145 }
 146
 147 static void wl1251_fw_wakeup(struct wl1251 *wl)
 148 {
 149         u32 elp_reg;
 150
 151         elp_reg = ELPCTRL_WAKE_UP;
 152         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 153         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 154
 155         if (!(elp_reg & ELPCTRL_WLAN_READY))
 156                 wl1251_warning("WLAN not ready");
 157 }
 158
 159 static int wl1251_chip_wakeup(struct wl1251 *wl)
 160 {
 161         int ret = 0;
 162
 163         wl1251_power_on(wl);
 164         msleep(WL1251_POWER_ON_SLEEP);
 165         wl->if_ops->reset(wl);
 166
 167         /* We don't need a real memory partition here, because we only want
 168          * to use the registers at this point. */
 169         wl1251_set_partition(wl,
 170                              0x00000000,
 171                              0x00000000,
 172                              REGISTERS_BASE,
 173                              REGISTERS_DOWN_SIZE);
 174
 175         /* ELP module wake up */
 176         wl1251_fw_wakeup(wl);
 177
 178         /* whal_FwCtrl_BootSm() */
 179
 180         /* 0. read chip id from CHIP_ID */
 181         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 182
 183         /* 1. check if chip id is valid */
 184
 185         switch (wl->chip_id) {
 186         case CHIP_ID_1251_PG12:
 187                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 188                              wl->chip_id);
 189                 break;
 190         case CHIP_ID_1251_PG11:
 191                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 192                              wl->chip_id);
 193                 break;
 194         case CHIP_ID_1251_PG10:
 195         default:
 196                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 197                 ret = -ENODEV;
 198                 goto out;
 199         }
 200
 201         if (wl->fw == NULL) {
 202                 ret = wl1251_fetch_firmware(wl);
 203                 if (ret < 0)
 204                         goto out;
 205         }
 206
 207         if (wl->nvs == NULL && !wl->use_eeprom) {
 208                 /* No NVS from netlink, try to get it from the filesystem */
 209                 ret = wl1251_fetch_nvs(wl);
 210                 if (ret < 0)
 211                         goto out;
 212         }
 213
 214 out:
 215         return ret;
 216 }
 217
 218 #define WL1251_IRQ_LOOP_COUNT 10
 219 static void wl1251_irq_work(struct work_struct *work)
 220 {
 221         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 222         struct wl1251 *wl =
 223                 container_of(work, struct wl1251, irq_work);
 224         int ret;
 225
 226         mutex_lock(&wl->mutex);
 227
 228         wl1251_debug(DEBUG_IRQ, "IRQ work");
 229
 230         if (wl->state == WL1251_STATE_OFF)
 231                 goto out;
 232
 233         ret = wl1251_ps_elp_wakeup(wl);
 234         if (ret < 0)
 235                 goto out;
 236
 237         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 238
 239         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 240         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 241
 242         do {
 243                 if (wl->data_path) {
 244                         wl->rx_counter = wl1251_mem_read32(
 245                                 wl, wl->data_path->rx_control_addr);
 246
 247                         /* We handle a frmware bug here */
 248                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 249                         case 0:
 250                                 wl1251_debug(DEBUG_IRQ,
 251                                              "RX: FW and host in sync");
 252                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 253                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 254                                 break;
 255                         case 1:
 256                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 257                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 258                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 259                                 break;
 260                         case 2:
 261                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 262                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 263                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 264                                 break;
 265                         default:
 266                                 wl1251_warning(
 267                                         "RX: FW and host out of sync: %d",
 268                                         wl->rx_counter - wl->rx_handled);
 269                                 break;
 270                         }
 271
 272                         wl->rx_handled = wl->rx_counter;
 273
 274                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 275                                      wl->rx_counter);
 276                 }
 277
 278                 intr &= wl->intr_mask;
 279
 280                 if (intr == 0) {
 281                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 282                         goto out_sleep;
 283                 }
 284
 285                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 286                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 287                         wl1251_rx(wl);
 288                 }
 289
 290                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 291                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 292                         wl1251_rx(wl);
 293                 }
 294
 295                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 296                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 297                         wl1251_tx_complete(wl);
 298                 }
 299
 300                 if (intr & (WL1251_ACX_INTR_EVENT_A |
 301                             WL1251_ACX_INTR_EVENT_B)) {
 302                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
 303                                      intr);
 304                         if (intr & WL1251_ACX_INTR_EVENT_A)
 305                                 wl1251_event_handle(wl, 0);
 306                         else
 307                                 wl1251_event_handle(wl, 1);
 308                 }
 309
 310                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 311                         wl1251_debug(DEBUG_IRQ,
 312                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 313
 314                 if (--ctr == 0)
 315                         break;
 316
 317                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 318         } while (intr);
 319
 320 out_sleep:
 321         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 322         wl1251_ps_elp_sleep(wl);
 323
 324 out:
 325         mutex_unlock(&wl->mutex);
 326 }
 327
 328 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 329                        u16 beacon_interval, u8 dtim_period)
 330 {
 331         int ret;
 332
 333         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 334                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 335                                      wl->tx_mgmt_frm_rate,
 336                                      wl->tx_mgmt_frm_mod);
 337         if (ret < 0)
 338                 goto out;
 339
 340
 341         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 342                               dtim_period);
 343         if (ret < 0)
 344                 goto out;
 345
 346         /*
 347          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 348          * locking we just sleep instead, for now
 349          */
 350         msleep(10);
 351
 352 out:
 353         return ret;
 354 }
 355
 356 static void wl1251_filter_work(struct work_struct *work)
 357 {
 358         struct wl1251 *wl =
 359                 container_of(work, struct wl1251, filter_work);
 360         int ret;
 361
 362         mutex_lock(&wl->mutex);
 363
 364         if (wl->state == WL1251_STATE_OFF)
 365                 goto out;
 366
 367         ret = wl1251_ps_elp_wakeup(wl);
 368         if (ret < 0)
 369                 goto out;
 370
 371         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 372                           wl->dtim_period);
 373         if (ret < 0)
 374                 goto out_sleep;
 375
 376 out_sleep:
 377         wl1251_ps_elp_sleep(wl);
 378
 379 out:
 380         mutex_unlock(&wl->mutex);
 381 }
 382
 383 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386
 387         skb_queue_tail(&wl->tx_queue, skb);
 388
 389         /*
 390          * The chip specific setup must run before the first TX packet -
 391          * before that, the tx_work will not be initialized!
 392          */
 393
 394         ieee80211_queue_work(wl->hw, &wl->tx_work);
 395
 396         /*
 397          * The workqueue is slow to process the tx_queue and we need stop
 398          * the queue here, otherwise the queue will get too long.
 399          */
 400         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 401                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 402                 ieee80211_stop_queues(wl->hw);
 403
 404                 /*
 405                  * FIXME: this is racy, the variable is not properly
 406                  * protected. Maybe fix this by removing the stupid
 407                  * variable altogether and checking the real queue state?
 408                  */
 409                 wl->tx_queue_stopped = true;
 410         }
 411
 412         return NETDEV_TX_OK;
 413 }
 414
 415 static int wl1251_op_start(struct ieee80211_hw *hw)
 416 {
 417         struct wl1251 *wl = hw->priv;
 418         int ret = 0;
 419
 420         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 421
 422         mutex_lock(&wl->mutex);
 423
 424         if (wl->state != WL1251_STATE_OFF) {
 425                 wl1251_error("cannot start because not in off state: %d",
 426                              wl->state);
 427                 ret = -EBUSY;
 428                 goto out;
 429         }
 430
 431         ret = wl1251_chip_wakeup(wl);
 432         if (ret < 0)
 433                 goto out;
 434
 435         ret = wl1251_boot(wl);
 436         if (ret < 0)
 437                 goto out;
 438
 439         ret = wl1251_hw_init(wl);
 440         if (ret < 0)
 441                 goto out;
 442
 443         ret = wl1251_acx_station_id(wl);
 444         if (ret < 0)
 445                 goto out;
 446
 447         wl->state = WL1251_STATE_ON;
 448
 449         wl1251_info("firmware booted (%s)", wl->fw_ver);
 450
 451 out:
 452         if (ret < 0)
 453                 wl1251_power_off(wl);
 454
 455         mutex_unlock(&wl->mutex);
 456
 457         return ret;
 458 }
 459
 460 static void wl1251_op_stop(struct ieee80211_hw *hw)
 461 {
 462         struct wl1251 *wl = hw->priv;
 463
 464         wl1251_info("down");
 465
 466         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 467
 468         mutex_lock(&wl->mutex);
 469
 470         WARN_ON(wl->state != WL1251_STATE_ON);
 471
 472         if (wl->scanning) {
 473                 mutex_unlock(&wl->mutex);
 474                 ieee80211_scan_completed(wl->hw, true);
 475                 mutex_lock(&wl->mutex);
 476                 wl->scanning = false;
 477         }
 478
 479         wl->state = WL1251_STATE_OFF;
 480
 481         wl1251_disable_interrupts(wl);
 482
 483         mutex_unlock(&wl->mutex);
 484
 485         cancel_work_sync(&wl->irq_work);
 486         cancel_work_sync(&wl->tx_work);
 487         cancel_work_sync(&wl->filter_work);
 488
 489         mutex_lock(&wl->mutex);
 490
 491         /* let's notify MAC80211 about the remaining pending TX frames */
 492         wl1251_tx_flush(wl);
 493         wl1251_power_off(wl);
 494
 495         memset(wl->bssid, 0, ETH_ALEN);
 496         wl->listen_int = 1;
 497         wl->bss_type = MAX_BSS_TYPE;
 498
 499         wl->data_in_count = 0;
 500         wl->rx_counter = 0;
 501         wl->rx_handled = 0;
 502         wl->rx_current_buffer = 0;
 503         wl->rx_last_id = 0;
 504         wl->next_tx_complete = 0;
 505         wl->elp = false;
 506         wl->psm = 0;
 507         wl->tx_queue_stopped = false;
 508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 509         wl->channel = WL1251_DEFAULT_CHANNEL;
 510
 511         wl1251_debugfs_reset(wl);
 512
 513         mutex_unlock(&wl->mutex);
 514 }
 515
 516 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 517                                    struct ieee80211_vif *vif)
 518 {
 519         struct wl1251 *wl = hw->priv;
 520         int ret = 0;
 521
 522         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 523                      vif->type, vif->addr);
 524
 525         mutex_lock(&wl->mutex);
 526         if (wl->vif) {
 527                 ret = -EBUSY;
 528                 goto out;
 529         }
 530
 531         wl->vif = vif;
 532
 533         switch (vif->type) {
 534         case NL80211_IFTYPE_STATION:
 535                 wl->bss_type = BSS_TYPE_STA_BSS;
 536                 break;
 537         case NL80211_IFTYPE_ADHOC:
 538                 wl->bss_type = BSS_TYPE_IBSS;
 539                 break;
 540         default:
 541                 ret = -EOPNOTSUPP;
 542                 goto out;
 543         }
 544
 545         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 546                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 547                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 548                 ret = wl1251_acx_station_id(wl);
 549                 if (ret < 0)
 550                         goto out;
 551         }
 552
 553 out:
 554         mutex_unlock(&wl->mutex);
 555         return ret;
 556 }
 557
 558 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 559                                          struct ieee80211_vif *vif)
 560 {
 561         struct wl1251 *wl = hw->priv;
 562
 563         mutex_lock(&wl->mutex);
 564         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 565         wl->vif = NULL;
 566         mutex_unlock(&wl->mutex);
 567 }
 568
 569 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 570 {
 571         struct ieee80211_qos_hdr template;
 572
 573         memset(&template, 0, sizeof(template));
 574
 575         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 576         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 577         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 578
 579         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 580                                              IEEE80211_STYPE_QOS_NULLFUNC |
 581                                              IEEE80211_FCTL_TODS);
 582
 583         /* FIXME: not sure what priority to use here */
 584         template.qos_ctrl = cpu_to_le16(0);
 585
 586         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 587                                        sizeof(template));
 588 }
 589
 590 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 591 {
 592         struct wl1251 *wl = hw->priv;
 593         struct ieee80211_conf *conf = &hw->conf;
 594         int channel, ret = 0;
 595
 596         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 597
 598         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 599                      channel,
 600                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 601                      conf->power_level);
 602
 603         mutex_lock(&wl->mutex);
 604
 605         ret = wl1251_ps_elp_wakeup(wl);
 606         if (ret < 0)
 607                 goto out;
 608
 609         if (channel != wl->channel) {
 610                 wl->channel = channel;
 611
 612                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 613                                   wl->beacon_int, wl->dtim_period);
 614                 if (ret < 0)
 615                         goto out_sleep;
 616         }
 617
 618         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 619                 wl1251_debug(DEBUG_PSM, "psm enabled");
 620
 621                 wl->psm_requested = true;
 622
 623                 wl->dtim_period = conf->ps_dtim_period;
 624
 625                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 626                                                   wl->dtim_period);
 627
 628                 /*
 629                  * mac80211 enables PSM only if we're already associated.
 630                  */
 631                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 632                 if (ret < 0)
 633                         goto out_sleep;
 634         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 635                    wl->psm_requested) {
 636                 wl1251_debug(DEBUG_PSM, "psm disabled");
 637
 638                 wl->psm_requested = false;
 639
 640                 if (wl->psm) {
 641                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 642                         if (ret < 0)
 643                                 goto out_sleep;
 644                 }
 645         }
 646
 647         if (conf->power_level != wl->power_level) {
 648                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 649                 if (ret < 0)
 650                         goto out_sleep;
 651
 652                 wl->power_level = conf->power_level;
 653         }
 654
 655 out_sleep:
 656         wl1251_ps_elp_sleep(wl);
 657
 658 out:
 659         mutex_unlock(&wl->mutex);
 660
 661         return ret;
 662 }
 663
 664 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 665                                   FIF_ALLMULTI | \
 666                                   FIF_FCSFAIL | \
 667                                   FIF_BCN_PRBRESP_PROMISC | \
 668                                   FIF_CONTROL | \
 669                                   FIF_OTHER_BSS)
 670
 671 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 672                                        unsigned int changed,
 673                                        unsigned int *total,u64 multicast)
 674 {
 675         struct wl1251 *wl = hw->priv;
 676
 677         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 678
 679         *total &= WL1251_SUPPORTED_FILTERS;
 680         changed &= WL1251_SUPPORTED_FILTERS;
 681
 682         if (changed == 0)
 683                 /* no filters which we support changed */
 684                 return;
 685
 686         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 687
 688         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 689         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 690
 691         if (*total & FIF_PROMISC_IN_BSS) {
 692                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 693                 wl->rx_config |= CFG_RX_ALL_GOOD;
 694         }
 695         if (*total & FIF_ALLMULTI)
 696                 /*
 697                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 698                  * all multicast frames
 699                  */
 700                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 701         if (*total & FIF_FCSFAIL)
 702                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 703         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 704                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 705                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 706         }
 707         if (*total & FIF_CONTROL)
 708                 wl->rx_filter |= CFG_RX_CTL_EN;
 709         if (*total & FIF_OTHER_BSS)
 710                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 711
 712         /*
 713          * FIXME: workqueues need to be properly cancelled on stop(), for
 714          * now let's just disable changing the filter settings. They will
 715          * be updated any on config().
 716          */
 717         /* schedule_work(&wl->filter_work); */
 718 }
 719
 720 /* HW encryption */
 721 static int wl1251_set_key_type(struct wl1251 *wl,
 722                                struct wl1251_cmd_set_keys *key,
 723                                enum set_key_cmd cmd,
 724                                struct ieee80211_key_conf *mac80211_key,
 725                                const u8 *addr)
 726 {
 727         switch (mac80211_key->alg) {
 728         case ALG_WEP:
 729                 if (is_broadcast_ether_addr(addr))
 730                         key->key_type = KEY_WEP_DEFAULT;
 731                 else
 732                         key->key_type = KEY_WEP_ADDR;
 733
 734                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 735                 break;
 736         case ALG_TKIP:
 737                 if (is_broadcast_ether_addr(addr))
 738                         key->key_type = KEY_TKIP_MIC_GROUP;
 739                 else
 740                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 741
 742                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 743                 break;
 744         case ALG_CCMP:
 745                 if (is_broadcast_ether_addr(addr))
 746                         key->key_type = KEY_AES_GROUP;
 747                 else
 748                         key->key_type = KEY_AES_PAIRWISE;
 749                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 750                 break;
 751         default:
 752                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 753                 return -EOPNOTSUPP;
 754         }
 755
 756         return 0;
 757 }
 758
 759 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 760                              struct ieee80211_vif *vif,
 761                              struct ieee80211_sta *sta,
 762                              struct ieee80211_key_conf *key)
 763 {
 764         struct wl1251 *wl = hw->priv;
 765         struct wl1251_cmd_set_keys *wl_cmd;
 766         const u8 *addr;
 767         int ret;
 768
 769         static const u8 bcast_addr[ETH_ALEN] =
 770                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 771
 772         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 773
 774         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 775         if (!wl_cmd) {
 776                 ret = -ENOMEM;
 777                 goto out;
 778         }
 779
 780         addr = sta ? sta->addr : bcast_addr;
 781
 782         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 783         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 784         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 785                      key->alg, key->keyidx, key->keylen, key->flags);
 786         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 787
 788         if (is_zero_ether_addr(addr)) {
 789                 /* We dont support TX only encryption */
 790                 ret = -EOPNOTSUPP;
 791                 goto out;
 792         }
 793
 794         mutex_lock(&wl->mutex);
 795
 796         ret = wl1251_ps_elp_wakeup(wl);
 797         if (ret < 0)
 798                 goto out_unlock;
 799
 800         switch (cmd) {
 801         case SET_KEY:
 802                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 803                 break;
 804         case DISABLE_KEY:
 805                 wl_cmd->key_action = KEY_REMOVE;
 806                 break;
 807         default:
 808                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 809                 break;
 810         }
 811
 812         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 813         if (ret < 0) {
 814                 wl1251_error("Set KEY type failed");
 815                 goto out_sleep;
 816         }
 817
 818         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 819                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 820
 821         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 822             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 823                 /*
 824                  * We get the key in the following form:
 825                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 826                  * but the target is expecting:
 827                  * TKIP - RX MIC - TX MIC
 828                  */
 829                 memcpy(wl_cmd->key, key->key, 16);
 830                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 831                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 832
 833         } else {
 834                 memcpy(wl_cmd->key, key->key, key->keylen);
 835         }
 836         wl_cmd->key_size = key->keylen;
 837
 838         wl_cmd->id = key->keyidx;
 839         wl_cmd->ssid_profile = 0;
 840
 841         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 842
 843         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 844         if (ret < 0) {
 845                 wl1251_warning("could not set keys");
 846                 goto out_sleep;
 847         }
 848
 849 out_sleep:
 850         wl1251_ps_elp_sleep(wl);
 851
 852 out_unlock:
 853         mutex_unlock(&wl->mutex);
 854
 855 out:
 856         kfree(wl_cmd);
 857
 858         return ret;
 859 }
 860
 861 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 862                              struct cfg80211_scan_request *req)
 863 {
 864         struct wl1251 *wl = hw->priv;
 865         struct sk_buff *skb;
 866         size_t ssid_len = 0;
 867         u8 *ssid = NULL;
 868         int ret;
 869
 870         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 871
 872         if (req->n_ssids) {
 873                 ssid = req->ssids[0].ssid;
 874                 ssid_len = req->ssids[0].ssid_len;
 875         }
 876
 877         mutex_lock(&wl->mutex);
 878
 879         if (wl->scanning) {
 880                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 881                 ret = -EINVAL;
 882                 goto out;
 883         }
 884
 885         ret = wl1251_ps_elp_wakeup(wl);
 886         if (ret < 0)
 887                 goto out;
 888
 889         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 890                                      req->ie, req->ie_len);
 891         if (!skb) {
 892                 ret = -ENOMEM;
 893                 goto out;
 894         }
 895
 896         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 897                                       skb->len);
 898         dev_kfree_skb(skb);
 899         if (ret < 0)
 900                 goto out_sleep;
 901
 902         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 903         if (ret < 0)
 904                 goto out_sleep;
 905
 906         wl->scanning = true;
 907
 908         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 909                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 910         if (ret < 0) {
 911                 wl->scanning = false;
 912                 goto out_sleep;
 913         }
 914
 915 out_sleep:
 916         wl1251_ps_elp_sleep(wl);
 917
 918 out:
 919         mutex_unlock(&wl->mutex);
 920
 921         return ret;
 922 }
 923
 924 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 925 {
 926         struct wl1251 *wl = hw->priv;
 927         int ret;
 928
 929         mutex_lock(&wl->mutex);
 930
 931         ret = wl1251_ps_elp_wakeup(wl);
 932         if (ret < 0)
 933                 goto out;
 934
 935         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 936         if (ret < 0)
 937                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 938
 939         wl1251_ps_elp_sleep(wl);
 940
 941 out:
 942         mutex_unlock(&wl->mutex);
 943
 944         return ret;
 945 }
 946
 947 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 948                                        struct ieee80211_vif *vif,
 949                                        struct ieee80211_bss_conf *bss_conf,
 950                                        u32 changed)
 951 {
 952         struct wl1251 *wl = hw->priv;
 953         struct sk_buff *beacon, *skb;
 954         int ret;
 955
 956         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 957
 958         mutex_lock(&wl->mutex);
 959
 960         ret = wl1251_ps_elp_wakeup(wl);
 961         if (ret < 0)
 962                 goto out;
 963
 964         if (changed & BSS_CHANGED_BSSID) {
 965                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 966
 967                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 968                 if (!skb)
 969                         goto out_sleep;
 970
 971                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 972                                               skb->data, skb->len);
 973                 dev_kfree_skb(skb);
 974                 if (ret < 0)
 975                         goto out_sleep;
 976
 977                 ret = wl1251_build_qos_null_data(wl);
 978                 if (ret < 0)
 979                         goto out;
 980
 981                 if (wl->bss_type != BSS_TYPE_IBSS) {
 982                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 983                                           wl->beacon_int, wl->dtim_period);
 984                         if (ret < 0)
 985                                 goto out_sleep;
 986                 }
 987         }
 988
 989         if (changed & BSS_CHANGED_ASSOC) {
 990                 if (bss_conf->assoc) {
 991                         wl->beacon_int = bss_conf->beacon_int;
 992
 993                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 994                         if (!skb)
 995                                 goto out_sleep;
 996
 997                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 998                                                       skb->data,
 999                                                       skb->len);
1000                         dev_kfree_skb(skb);
1001                         if (ret < 0)
1002                                 goto out_sleep;
1003
1004                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1005                         if (ret < 0)
1006                                 goto out_sleep;
1007                 } else {
1008                         /* use defaults when not associated */
1009                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1010                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1011                 }
1012         }
1013         if (changed & BSS_CHANGED_ERP_SLOT) {
1014                 if (bss_conf->use_short_slot)
1015                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1016                 else
1017                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1018                 if (ret < 0) {
1019                         wl1251_warning("Set slot time failed %d", ret);
1020                         goto out_sleep;
1021                 }
1022         }
1023
1024         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1025                 if (bss_conf->use_short_preamble)
1026                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1027                 else
1028                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1029         }
1030
1031         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1032                 if (bss_conf->use_cts_prot)
1033                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1034                 else
1035                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1036                 if (ret < 0) {
1037                         wl1251_warning("Set ctsprotect failed %d", ret);
1038                         goto out_sleep;
1039                 }
1040         }
1041
1042         if (changed & BSS_CHANGED_BEACON) {
1043                 beacon = ieee80211_beacon_get(hw, vif);
1044                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1045                                               beacon->len);
1046
1047                 if (ret < 0) {
1048                         dev_kfree_skb(beacon);
1049                         goto out_sleep;
1050                 }
1051
1052                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1053                                               beacon->len);
1054
1055                 dev_kfree_skb(beacon);
1056
1057                 if (ret < 0)
1058                         goto out_sleep;
1059
1060                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1061                                   wl->channel, wl->dtim_period);
1062
1063                 if (ret < 0)
1064                         goto out_sleep;
1065         }
1066
1067 out_sleep:
1068         wl1251_ps_elp_sleep(wl);
1069
1070 out:
1071         mutex_unlock(&wl->mutex);
1072 }
1073
1074
1075 /* can't be const, mac80211 writes to this */
1076 static struct ieee80211_rate wl1251_rates[] = {
1077         { .bitrate = 10,
1078           .hw_value = 0x1,
1079           .hw_value_short = 0x1, },
1080         { .bitrate = 20,
1081           .hw_value = 0x2,
1082           .hw_value_short = 0x2,
1083           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1084         { .bitrate = 55,
1085           .hw_value = 0x4,
1086           .hw_value_short = 0x4,
1087           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1088         { .bitrate = 110,
1089           .hw_value = 0x20,
1090           .hw_value_short = 0x20,
1091           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1092         { .bitrate = 60,
1093           .hw_value = 0x8,
1094           .hw_value_short = 0x8, },
1095         { .bitrate = 90,
1096           .hw_value = 0x10,
1097           .hw_value_short = 0x10, },
1098         { .bitrate = 120,
1099           .hw_value = 0x40,
1100           .hw_value_short = 0x40, },
1101         { .bitrate = 180,
1102           .hw_value = 0x80,
1103           .hw_value_short = 0x80, },
1104         { .bitrate = 240,
1105           .hw_value = 0x200,
1106           .hw_value_short = 0x200, },
1107         { .bitrate = 360,
1108          .hw_value = 0x400,
1109          .hw_value_short = 0x400, },
1110         { .bitrate = 480,
1111           .hw_value = 0x800,
1112           .hw_value_short = 0x800, },
1113         { .bitrate = 540,
1114           .hw_value = 0x1000,
1115           .hw_value_short = 0x1000, },
1116 };
1117
1118 /* can't be const, mac80211 writes to this */
1119 static struct ieee80211_channel wl1251_channels[] = {
1120         { .hw_value = 1, .center_freq = 2412},
1121         { .hw_value = 2, .center_freq = 2417},
1122         { .hw_value = 3, .center_freq = 2422},
1123         { .hw_value = 4, .center_freq = 2427},
1124         { .hw_value = 5, .center_freq = 2432},
1125         { .hw_value = 6, .center_freq = 2437},
1126         { .hw_value = 7, .center_freq = 2442},
1127         { .hw_value = 8, .center_freq = 2447},
1128         { .hw_value = 9, .center_freq = 2452},
1129         { .hw_value = 10, .center_freq = 2457},
1130         { .hw_value = 11, .center_freq = 2462},
1131         { .hw_value = 12, .center_freq = 2467},
1132         { .hw_value = 13, .center_freq = 2472},
1133 };
1134
1135 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1136                              const struct ieee80211_tx_queue_params *params)
1137 {
1138         enum wl1251_acx_ps_scheme ps_scheme;
1139         struct wl1251 *wl = hw->priv;
1140         int ret;
1141
1142         mutex_lock(&wl->mutex);
1143
1144         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1145
1146         ret = wl1251_ps_elp_wakeup(wl);
1147         if (ret < 0)
1148                 goto out;
1149
1150         /* mac80211 uses units of 32 usec */
1151         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1152                                 params->cw_min, params->cw_max,
1153                                 params->aifs, params->txop * 32);
1154         if (ret < 0)
1155                 goto out_sleep;
1156
1157         if (params->uapsd)
1158                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1159         else
1160                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1161
1162         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1163                                  CHANNEL_TYPE_EDCF,
1164                                  wl1251_tx_get_queue(queue), ps_scheme,
1165                                  WL1251_ACX_ACK_POLICY_LEGACY);
1166         if (ret < 0)
1167                 goto out_sleep;
1168
1169 out_sleep:
1170         wl1251_ps_elp_sleep(wl);
1171
1172 out:
1173         mutex_unlock(&wl->mutex);
1174
1175         return ret;
1176 }
1177
1178 /* can't be const, mac80211 writes to this */
1179 static struct ieee80211_supported_band wl1251_band_2ghz = {
1180         .channels = wl1251_channels,
1181         .n_channels = ARRAY_SIZE(wl1251_channels),
1182         .bitrates = wl1251_rates,
1183         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1184 };
1185
1186 static const struct ieee80211_ops wl1251_ops = {
1187         .start = wl1251_op_start,
1188         .stop = wl1251_op_stop,
1189         .add_interface = wl1251_op_add_interface,
1190         .remove_interface = wl1251_op_remove_interface,
1191         .config = wl1251_op_config,
1192         .configure_filter = wl1251_op_configure_filter,
1193         .tx = wl1251_op_tx,
1194         .set_key = wl1251_op_set_key,
1195         .hw_scan = wl1251_op_hw_scan,
1196         .bss_info_changed = wl1251_op_bss_info_changed,
1197         .set_rts_threshold = wl1251_op_set_rts_threshold,
1198         .conf_tx = wl1251_op_conf_tx,
1199 };
1200
1201 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1202 {
1203         unsigned long timeout;
1204
1205         wl1251_reg_write32(wl, EE_ADDR, offset);
1206         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1207
1208         /* EE_CTL_READ clears when data is ready */
1209         timeout = jiffies + msecs_to_jiffies(100);
1210         while (1) {
1211                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1212                         break;
1213
1214                 if (time_after(jiffies, timeout))
1215                         return -ETIMEDOUT;
1216
1217                 msleep(1);
1218         }
1219
1220         *data = wl1251_reg_read32(wl, EE_DATA);
1221         return 0;
1222 }
1223
1224 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1225                               u8 *data, size_t len)
1226 {
1227         size_t i;
1228         int ret;
1229
1230         wl1251_reg_write32(wl, EE_START, 0);
1231
1232         for (i = 0; i < len; i++) {
1233                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1234                 if (ret < 0)
1235                         return ret;
1236         }
1237
1238         return 0;
1239 }
1240
1241 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1242 {
1243         u8 mac[ETH_ALEN];
1244         int i, ret;
1245
1246         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1247
1248         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1249         if (ret < 0) {
1250                 wl1251_warning("failed to read MAC address from EEPROM");
1251                 return ret;
1252         }
1253
1254         /* MAC is stored in reverse order */
1255         for (i = 0; i < ETH_ALEN; i++)
1256                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1257
1258         return 0;
1259 }
1260
1261 static int wl1251_register_hw(struct wl1251 *wl)
1262 {
1263         int ret;
1264
1265         if (wl->mac80211_registered)
1266                 return 0;
1267
1268         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1269
1270         ret = ieee80211_register_hw(wl->hw);
1271         if (ret < 0) {
1272                 wl1251_error("unable to register mac80211 hw: %d", ret);
1273                 return ret;
1274         }
1275
1276         wl->mac80211_registered = true;
1277
1278         wl1251_notice("loaded");
1279
1280         return 0;
1281 }
1282
1283 int wl1251_init_ieee80211(struct wl1251 *wl)
1284 {
1285         int ret;
1286
1287         /* The tx descriptor buffer and the TKIP space */
1288         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1289                 + WL1251_TKIP_IV_SPACE;
1290
1291         /* unit us */
1292         /* FIXME: find a proper value */
1293         wl->hw->channel_change_time = 10000;
1294
1295         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1296                 IEEE80211_HW_NOISE_DBM |
1297                 IEEE80211_HW_SUPPORTS_PS |
1298                 IEEE80211_HW_BEACON_FILTER |
1299                 IEEE80211_HW_SUPPORTS_UAPSD;
1300
1301         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1302         wl->hw->wiphy->max_scan_ssids = 1;
1303         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1304
1305         wl->hw->queues = 4;
1306
1307         if (wl->use_eeprom)
1308                 wl1251_read_eeprom_mac(wl);
1309
1310         ret = wl1251_register_hw(wl);
1311         if (ret)
1312                 goto out;
1313
1314         wl1251_debugfs_init(wl);
1315         wl1251_notice("initialized");
1316
1317         ret = 0;
1318
1319 out:
1320         return ret;
1321 }
1322 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1323
1324 struct ieee80211_hw *wl1251_alloc_hw(void)
1325 {
1326         struct ieee80211_hw *hw;
1327         struct wl1251 *wl;
1328         int i;
1329         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1330
1331         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1332         if (!hw) {
1333                 wl1251_error("could not alloc ieee80211_hw");
1334                 return ERR_PTR(-ENOMEM);
1335         }
1336
1337         wl = hw->priv;
1338         memset(wl, 0, sizeof(*wl));
1339
1340         wl->hw = hw;
1341
1342         wl->data_in_count = 0;
1343
1344         skb_queue_head_init(&wl->tx_queue);
1345
1346         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1347         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1348         wl->channel = WL1251_DEFAULT_CHANNEL;
1349         wl->scanning = false;
1350         wl->default_key = 0;
1351         wl->listen_int = 1;
1352         wl->rx_counter = 0;
1353         wl->rx_handled = 0;
1354         wl->rx_current_buffer = 0;
1355         wl->rx_last_id = 0;
1356         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1357         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1358         wl->elp = false;
1359         wl->psm = 0;
1360         wl->psm_requested = false;
1361         wl->tx_queue_stopped = false;
1362         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1363         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1364         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1365         wl->vif = NULL;
1366
1367         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1368                 wl->tx_frames[i] = NULL;
1369
1370         wl->next_tx_complete = 0;
1371
1372         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1373         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1374
1375         /*
1376          * In case our MAC address is not correctly set,
1377          * we use a random but Nokia MAC.
1378          */
1379         memcpy(wl->mac_addr, nokia_oui, 3);
1380         get_random_bytes(wl->mac_addr + 3, 3);
1381
1382         wl->state = WL1251_STATE_OFF;
1383         mutex_init(&wl->mutex);
1384
1385         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1386         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1387
1388         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1389         if (!wl->rx_descriptor) {
1390                 wl1251_error("could not allocate memory for rx descriptor");
1391                 ieee80211_free_hw(hw);
1392                 return ERR_PTR(-ENOMEM);
1393         }
1394
1395         return hw;
1396 }
1397 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1398
1399 int wl1251_free_hw(struct wl1251 *wl)
1400 {
1401         ieee80211_unregister_hw(wl->hw);
1402
1403         wl1251_debugfs_exit(wl);
1404
1405         kfree(wl->target_mem_map);
1406         kfree(wl->data_path);
1407         vfree(wl->fw);
1408         wl->fw = NULL;
1409         kfree(wl->nvs);
1410         wl->nvs = NULL;
1411
1412         kfree(wl->rx_descriptor);
1413         wl->rx_descriptor = NULL;
1414
1415         ieee80211_free_hw(wl->hw);
1416
1417         return 0;
1418 }
1419 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1420
1421 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1422 MODULE_LICENSE("GPL");
1423 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1424 MODULE_FIRMWARE(WL1251_FW_NAME);