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 = kmemdup(fw->data, 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         ret = 0;
 138
 139 out:
 140         release_firmware(fw);
 141
 142         return ret;
 143 }
 144
 145 static void wl1251_fw_wakeup(struct wl1251 *wl)
 146 {
 147         u32 elp_reg;
 148
 149         elp_reg = ELPCTRL_WAKE_UP;
 150         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 151         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 152
 153         if (!(elp_reg & ELPCTRL_WLAN_READY))
 154                 wl1251_warning("WLAN not ready");
 155 }
 156
 157 static int wl1251_chip_wakeup(struct wl1251 *wl)
 158 {
 159         int ret = 0;
 160
 161         wl1251_power_on(wl);
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 300                         wl1251_event_handle(wl, 0);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 305                         wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338
 339         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 340                               dtim_period);
 341         if (ret < 0)
 342                 goto out;
 343
 344         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 345         if (ret < 0)
 346                 wl1251_warning("join timeout");
 347
 348 out:
 349         return ret;
 350 }
 351
 352 static void wl1251_filter_work(struct work_struct *work)
 353 {
 354         struct wl1251 *wl =
 355                 container_of(work, struct wl1251, filter_work);
 356         int ret;
 357
 358         mutex_lock(&wl->mutex);
 359
 360         if (wl->state == WL1251_STATE_OFF)
 361                 goto out;
 362
 363         ret = wl1251_ps_elp_wakeup(wl);
 364         if (ret < 0)
 365                 goto out;
 366
 367         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 368                           wl->dtim_period);
 369         if (ret < 0)
 370                 goto out_sleep;
 371
 372 out_sleep:
 373         wl1251_ps_elp_sleep(wl);
 374
 375 out:
 376         mutex_unlock(&wl->mutex);
 377 }
 378
 379 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 380 {
 381         struct wl1251 *wl = hw->priv;
 382
 383         skb_queue_tail(&wl->tx_queue, skb);
 384
 385         /*
 386          * The chip specific setup must run before the first TX packet -
 387          * before that, the tx_work will not be initialized!
 388          */
 389
 390         ieee80211_queue_work(wl->hw, &wl->tx_work);
 391
 392         /*
 393          * The workqueue is slow to process the tx_queue and we need stop
 394          * the queue here, otherwise the queue will get too long.
 395          */
 396         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 397                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 398                 ieee80211_stop_queues(wl->hw);
 399
 400                 /*
 401                  * FIXME: this is racy, the variable is not properly
 402                  * protected. Maybe fix this by removing the stupid
 403                  * variable altogether and checking the real queue state?
 404                  */
 405                 wl->tx_queue_stopped = true;
 406         }
 407
 408         return NETDEV_TX_OK;
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         struct wiphy *wiphy = hw->wiphy;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448         /* update hw/fw version info in wiphy struct */
 449         wiphy->hw_version = wl->chip_id;
 450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 451
 452 out:
 453         if (ret < 0)
 454                 wl1251_power_off(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         return ret;
 459 }
 460
 461 static void wl1251_op_stop(struct ieee80211_hw *hw)
 462 {
 463         struct wl1251 *wl = hw->priv;
 464
 465         wl1251_info("down");
 466
 467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 468
 469         mutex_lock(&wl->mutex);
 470
 471         WARN_ON(wl->state != WL1251_STATE_ON);
 472
 473         if (wl->scanning) {
 474                 mutex_unlock(&wl->mutex);
 475                 ieee80211_scan_completed(wl->hw, true);
 476                 mutex_lock(&wl->mutex);
 477                 wl->scanning = false;
 478         }
 479
 480         wl->state = WL1251_STATE_OFF;
 481
 482         wl1251_disable_interrupts(wl);
 483
 484         mutex_unlock(&wl->mutex);
 485
 486         cancel_work_sync(&wl->irq_work);
 487         cancel_work_sync(&wl->tx_work);
 488         cancel_work_sync(&wl->filter_work);
 489
 490         mutex_lock(&wl->mutex);
 491
 492         /* let's notify MAC80211 about the remaining pending TX frames */
 493         wl1251_tx_flush(wl);
 494         wl1251_power_off(wl);
 495
 496         memset(wl->bssid, 0, ETH_ALEN);
 497         wl->listen_int = 1;
 498         wl->bss_type = MAX_BSS_TYPE;
 499
 500         wl->data_in_count = 0;
 501         wl->rx_counter = 0;
 502         wl->rx_handled = 0;
 503         wl->rx_current_buffer = 0;
 504         wl->rx_last_id = 0;
 505         wl->next_tx_complete = 0;
 506         wl->elp = false;
 507         wl->psm = 0;
 508         wl->tx_queue_stopped = false;
 509         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 510         wl->channel = WL1251_DEFAULT_CHANNEL;
 511
 512         wl1251_debugfs_reset(wl);
 513
 514         mutex_unlock(&wl->mutex);
 515 }
 516
 517 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 518                                    struct ieee80211_vif *vif)
 519 {
 520         struct wl1251 *wl = hw->priv;
 521         int ret = 0;
 522
 523         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 524                      vif->type, vif->addr);
 525
 526         mutex_lock(&wl->mutex);
 527         if (wl->vif) {
 528                 ret = -EBUSY;
 529                 goto out;
 530         }
 531
 532         wl->vif = vif;
 533
 534         switch (vif->type) {
 535         case NL80211_IFTYPE_STATION:
 536                 wl->bss_type = BSS_TYPE_STA_BSS;
 537                 break;
 538         case NL80211_IFTYPE_ADHOC:
 539                 wl->bss_type = BSS_TYPE_IBSS;
 540                 break;
 541         default:
 542                 ret = -EOPNOTSUPP;
 543                 goto out;
 544         }
 545
 546         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 547                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 548                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 549                 ret = wl1251_acx_station_id(wl);
 550                 if (ret < 0)
 551                         goto out;
 552         }
 553
 554 out:
 555         mutex_unlock(&wl->mutex);
 556         return ret;
 557 }
 558
 559 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 560                                          struct ieee80211_vif *vif)
 561 {
 562         struct wl1251 *wl = hw->priv;
 563
 564         mutex_lock(&wl->mutex);
 565         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 566         wl->vif = NULL;
 567         mutex_unlock(&wl->mutex);
 568 }
 569
 570 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 571 {
 572         struct ieee80211_qos_hdr template;
 573
 574         memset(&template, 0, sizeof(template));
 575
 576         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 577         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 578         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 579
 580         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 581                                              IEEE80211_STYPE_QOS_NULLFUNC |
 582                                              IEEE80211_FCTL_TODS);
 583
 584         /* FIXME: not sure what priority to use here */
 585         template.qos_ctrl = cpu_to_le16(0);
 586
 587         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 588                                        sizeof(template));
 589 }
 590
 591 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 592 {
 593         struct wl1251 *wl = hw->priv;
 594         struct ieee80211_conf *conf = &hw->conf;
 595         int channel, ret = 0;
 596
 597         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 598
 599         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 600                      channel,
 601                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 602                      conf->power_level);
 603
 604         mutex_lock(&wl->mutex);
 605
 606         ret = wl1251_ps_elp_wakeup(wl);
 607         if (ret < 0)
 608                 goto out;
 609
 610         if (channel != wl->channel) {
 611                 wl->channel = channel;
 612
 613                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 614                                   wl->beacon_int, wl->dtim_period);
 615                 if (ret < 0)
 616                         goto out_sleep;
 617         }
 618
 619         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 620                 wl1251_debug(DEBUG_PSM, "psm enabled");
 621
 622                 wl->psm_requested = true;
 623
 624                 wl->dtim_period = conf->ps_dtim_period;
 625
 626                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 627                                                   wl->dtim_period);
 628
 629                 /*
 630                  * mac80211 enables PSM only if we're already associated.
 631                  */
 632                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 633                 if (ret < 0)
 634                         goto out_sleep;
 635         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 636                    wl->psm_requested) {
 637                 wl1251_debug(DEBUG_PSM, "psm disabled");
 638
 639                 wl->psm_requested = false;
 640
 641                 if (wl->psm) {
 642                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 643                         if (ret < 0)
 644                                 goto out_sleep;
 645                 }
 646         }
 647
 648         if (conf->power_level != wl->power_level) {
 649                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 650                 if (ret < 0)
 651                         goto out_sleep;
 652
 653                 wl->power_level = conf->power_level;
 654         }
 655
 656 out_sleep:
 657         wl1251_ps_elp_sleep(wl);
 658
 659 out:
 660         mutex_unlock(&wl->mutex);
 661
 662         return ret;
 663 }
 664
 665 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 666                                   FIF_ALLMULTI | \
 667                                   FIF_FCSFAIL | \
 668                                   FIF_BCN_PRBRESP_PROMISC | \
 669                                   FIF_CONTROL | \
 670                                   FIF_OTHER_BSS)
 671
 672 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 673                                        unsigned int changed,
 674                                        unsigned int *total,u64 multicast)
 675 {
 676         struct wl1251 *wl = hw->priv;
 677
 678         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 679
 680         *total &= WL1251_SUPPORTED_FILTERS;
 681         changed &= WL1251_SUPPORTED_FILTERS;
 682
 683         if (changed == 0)
 684                 /* no filters which we support changed */
 685                 return;
 686
 687         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 688
 689         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 690         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 691
 692         if (*total & FIF_PROMISC_IN_BSS) {
 693                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 694                 wl->rx_config |= CFG_RX_ALL_GOOD;
 695         }
 696         if (*total & FIF_ALLMULTI)
 697                 /*
 698                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 699                  * all multicast frames
 700                  */
 701                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 702         if (*total & FIF_FCSFAIL)
 703                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 704         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 705                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 706                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 707         }
 708         if (*total & FIF_CONTROL)
 709                 wl->rx_filter |= CFG_RX_CTL_EN;
 710         if (*total & FIF_OTHER_BSS)
 711                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 712
 713         /*
 714          * FIXME: workqueues need to be properly cancelled on stop(), for
 715          * now let's just disable changing the filter settings. They will
 716          * be updated any on config().
 717          */
 718         /* schedule_work(&wl->filter_work); */
 719 }
 720
 721 /* HW encryption */
 722 static int wl1251_set_key_type(struct wl1251 *wl,
 723                                struct wl1251_cmd_set_keys *key,
 724                                enum set_key_cmd cmd,
 725                                struct ieee80211_key_conf *mac80211_key,
 726                                const u8 *addr)
 727 {
 728         switch (mac80211_key->alg) {
 729         case ALG_WEP:
 730                 if (is_broadcast_ether_addr(addr))
 731                         key->key_type = KEY_WEP_DEFAULT;
 732                 else
 733                         key->key_type = KEY_WEP_ADDR;
 734
 735                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 736                 break;
 737         case ALG_TKIP:
 738                 if (is_broadcast_ether_addr(addr))
 739                         key->key_type = KEY_TKIP_MIC_GROUP;
 740                 else
 741                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 742
 743                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 744                 break;
 745         case ALG_CCMP:
 746                 if (is_broadcast_ether_addr(addr))
 747                         key->key_type = KEY_AES_GROUP;
 748                 else
 749                         key->key_type = KEY_AES_PAIRWISE;
 750                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 751                 break;
 752         default:
 753                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 754                 return -EOPNOTSUPP;
 755         }
 756
 757         return 0;
 758 }
 759
 760 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 761                              struct ieee80211_vif *vif,
 762                              struct ieee80211_sta *sta,
 763                              struct ieee80211_key_conf *key)
 764 {
 765         struct wl1251 *wl = hw->priv;
 766         struct wl1251_cmd_set_keys *wl_cmd;
 767         const u8 *addr;
 768         int ret;
 769
 770         static const u8 bcast_addr[ETH_ALEN] =
 771                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 772
 773         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 774
 775         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 776         if (!wl_cmd) {
 777                 ret = -ENOMEM;
 778                 goto out;
 779         }
 780
 781         addr = sta ? sta->addr : bcast_addr;
 782
 783         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 784         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 785         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 786                      key->alg, key->keyidx, key->keylen, key->flags);
 787         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 788
 789         if (is_zero_ether_addr(addr)) {
 790                 /* We dont support TX only encryption */
 791                 ret = -EOPNOTSUPP;
 792                 goto out;
 793         }
 794
 795         mutex_lock(&wl->mutex);
 796
 797         ret = wl1251_ps_elp_wakeup(wl);
 798         if (ret < 0)
 799                 goto out_unlock;
 800
 801         switch (cmd) {
 802         case SET_KEY:
 803                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 804                 break;
 805         case DISABLE_KEY:
 806                 wl_cmd->key_action = KEY_REMOVE;
 807                 break;
 808         default:
 809                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 810                 break;
 811         }
 812
 813         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 814         if (ret < 0) {
 815                 wl1251_error("Set KEY type failed");
 816                 goto out_sleep;
 817         }
 818
 819         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 820                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 821
 822         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 823             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 824                 /*
 825                  * We get the key in the following form:
 826                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 827                  * but the target is expecting:
 828                  * TKIP - RX MIC - TX MIC
 829                  */
 830                 memcpy(wl_cmd->key, key->key, 16);
 831                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 832                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 833
 834         } else {
 835                 memcpy(wl_cmd->key, key->key, key->keylen);
 836         }
 837         wl_cmd->key_size = key->keylen;
 838
 839         wl_cmd->id = key->keyidx;
 840         wl_cmd->ssid_profile = 0;
 841
 842         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 843
 844         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 845         if (ret < 0) {
 846                 wl1251_warning("could not set keys");
 847                 goto out_sleep;
 848         }
 849
 850 out_sleep:
 851         wl1251_ps_elp_sleep(wl);
 852
 853 out_unlock:
 854         mutex_unlock(&wl->mutex);
 855
 856 out:
 857         kfree(wl_cmd);
 858
 859         return ret;
 860 }
 861
 862 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 863                              struct cfg80211_scan_request *req)
 864 {
 865         struct wl1251 *wl = hw->priv;
 866         struct sk_buff *skb;
 867         size_t ssid_len = 0;
 868         u8 *ssid = NULL;
 869         int ret;
 870
 871         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 872
 873         if (req->n_ssids) {
 874                 ssid = req->ssids[0].ssid;
 875                 ssid_len = req->ssids[0].ssid_len;
 876         }
 877
 878         mutex_lock(&wl->mutex);
 879
 880         if (wl->scanning) {
 881                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 882                 ret = -EINVAL;
 883                 goto out;
 884         }
 885
 886         ret = wl1251_ps_elp_wakeup(wl);
 887         if (ret < 0)
 888                 goto out;
 889
 890         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 891                                      req->ie, req->ie_len);
 892         if (!skb) {
 893                 ret = -ENOMEM;
 894                 goto out;
 895         }
 896
 897         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 898                                       skb->len);
 899         dev_kfree_skb(skb);
 900         if (ret < 0)
 901                 goto out_sleep;
 902
 903         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 904         if (ret < 0)
 905                 goto out_sleep;
 906
 907         wl->scanning = true;
 908
 909         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 910                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 911         if (ret < 0) {
 912                 wl->scanning = false;
 913                 goto out_sleep;
 914         }
 915
 916 out_sleep:
 917         wl1251_ps_elp_sleep(wl);
 918
 919 out:
 920         mutex_unlock(&wl->mutex);
 921
 922         return ret;
 923 }
 924
 925 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 926 {
 927         struct wl1251 *wl = hw->priv;
 928         int ret;
 929
 930         mutex_lock(&wl->mutex);
 931
 932         ret = wl1251_ps_elp_wakeup(wl);
 933         if (ret < 0)
 934                 goto out;
 935
 936         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 937         if (ret < 0)
 938                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 939
 940         wl1251_ps_elp_sleep(wl);
 941
 942 out:
 943         mutex_unlock(&wl->mutex);
 944
 945         return ret;
 946 }
 947
 948 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 949                                        struct ieee80211_vif *vif,
 950                                        struct ieee80211_bss_conf *bss_conf,
 951                                        u32 changed)
 952 {
 953         struct wl1251 *wl = hw->priv;
 954         struct sk_buff *beacon, *skb;
 955         int ret;
 956
 957         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 958
 959         mutex_lock(&wl->mutex);
 960
 961         ret = wl1251_ps_elp_wakeup(wl);
 962         if (ret < 0)
 963                 goto out;
 964
 965         if (changed & BSS_CHANGED_BSSID) {
 966                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
 967
 968                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 969                 if (!skb)
 970                         goto out_sleep;
 971
 972                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
 973                                               skb->data, skb->len);
 974                 dev_kfree_skb(skb);
 975                 if (ret < 0)
 976                         goto out_sleep;
 977
 978                 ret = wl1251_build_qos_null_data(wl);
 979                 if (ret < 0)
 980                         goto out;
 981
 982                 if (wl->bss_type != BSS_TYPE_IBSS) {
 983                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 984                                           wl->beacon_int, wl->dtim_period);
 985                         if (ret < 0)
 986                                 goto out_sleep;
 987                 }
 988         }
 989
 990         if (changed & BSS_CHANGED_ASSOC) {
 991                 if (bss_conf->assoc) {
 992                         wl->beacon_int = bss_conf->beacon_int;
 993
 994                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
 995                         if (!skb)
 996                                 goto out_sleep;
 997
 998                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
 999                                                       skb->data,
1000                                                       skb->len);
1001                         dev_kfree_skb(skb);
1002                         if (ret < 0)
1003                                 goto out_sleep;
1004
1005                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1006                         if (ret < 0)
1007                                 goto out_sleep;
1008                 } else {
1009                         /* use defaults when not associated */
1010                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1011                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1012                 }
1013         }
1014         if (changed & BSS_CHANGED_ERP_SLOT) {
1015                 if (bss_conf->use_short_slot)
1016                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1017                 else
1018                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1019                 if (ret < 0) {
1020                         wl1251_warning("Set slot time failed %d", ret);
1021                         goto out_sleep;
1022                 }
1023         }
1024
1025         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1026                 if (bss_conf->use_short_preamble)
1027                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1028                 else
1029                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1030         }
1031
1032         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1033                 if (bss_conf->use_cts_prot)
1034                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1035                 else
1036                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1037                 if (ret < 0) {
1038                         wl1251_warning("Set ctsprotect failed %d", ret);
1039                         goto out_sleep;
1040                 }
1041         }
1042
1043         if (changed & BSS_CHANGED_BEACON) {
1044                 beacon = ieee80211_beacon_get(hw, vif);
1045                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1046                                               beacon->len);
1047
1048                 if (ret < 0) {
1049                         dev_kfree_skb(beacon);
1050                         goto out_sleep;
1051                 }
1052
1053                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1054                                               beacon->len);
1055
1056                 dev_kfree_skb(beacon);
1057
1058                 if (ret < 0)
1059                         goto out_sleep;
1060
1061                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1062                                   wl->channel, wl->dtim_period);
1063
1064                 if (ret < 0)
1065                         goto out_sleep;
1066         }
1067
1068 out_sleep:
1069         wl1251_ps_elp_sleep(wl);
1070
1071 out:
1072         mutex_unlock(&wl->mutex);
1073 }
1074
1075
1076 /* can't be const, mac80211 writes to this */
1077 static struct ieee80211_rate wl1251_rates[] = {
1078         { .bitrate = 10,
1079           .hw_value = 0x1,
1080           .hw_value_short = 0x1, },
1081         { .bitrate = 20,
1082           .hw_value = 0x2,
1083           .hw_value_short = 0x2,
1084           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1085         { .bitrate = 55,
1086           .hw_value = 0x4,
1087           .hw_value_short = 0x4,
1088           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1089         { .bitrate = 110,
1090           .hw_value = 0x20,
1091           .hw_value_short = 0x20,
1092           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1093         { .bitrate = 60,
1094           .hw_value = 0x8,
1095           .hw_value_short = 0x8, },
1096         { .bitrate = 90,
1097           .hw_value = 0x10,
1098           .hw_value_short = 0x10, },
1099         { .bitrate = 120,
1100           .hw_value = 0x40,
1101           .hw_value_short = 0x40, },
1102         { .bitrate = 180,
1103           .hw_value = 0x80,
1104           .hw_value_short = 0x80, },
1105         { .bitrate = 240,
1106           .hw_value = 0x200,
1107           .hw_value_short = 0x200, },
1108         { .bitrate = 360,
1109          .hw_value = 0x400,
1110          .hw_value_short = 0x400, },
1111         { .bitrate = 480,
1112           .hw_value = 0x800,
1113           .hw_value_short = 0x800, },
1114         { .bitrate = 540,
1115           .hw_value = 0x1000,
1116           .hw_value_short = 0x1000, },
1117 };
1118
1119 /* can't be const, mac80211 writes to this */
1120 static struct ieee80211_channel wl1251_channels[] = {
1121         { .hw_value = 1, .center_freq = 2412},
1122         { .hw_value = 2, .center_freq = 2417},
1123         { .hw_value = 3, .center_freq = 2422},
1124         { .hw_value = 4, .center_freq = 2427},
1125         { .hw_value = 5, .center_freq = 2432},
1126         { .hw_value = 6, .center_freq = 2437},
1127         { .hw_value = 7, .center_freq = 2442},
1128         { .hw_value = 8, .center_freq = 2447},
1129         { .hw_value = 9, .center_freq = 2452},
1130         { .hw_value = 10, .center_freq = 2457},
1131         { .hw_value = 11, .center_freq = 2462},
1132         { .hw_value = 12, .center_freq = 2467},
1133         { .hw_value = 13, .center_freq = 2472},
1134 };
1135
1136 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1137                              const struct ieee80211_tx_queue_params *params)
1138 {
1139         enum wl1251_acx_ps_scheme ps_scheme;
1140         struct wl1251 *wl = hw->priv;
1141         int ret;
1142
1143         mutex_lock(&wl->mutex);
1144
1145         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1146
1147         ret = wl1251_ps_elp_wakeup(wl);
1148         if (ret < 0)
1149                 goto out;
1150
1151         /* mac80211 uses units of 32 usec */
1152         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1153                                 params->cw_min, params->cw_max,
1154                                 params->aifs, params->txop * 32);
1155         if (ret < 0)
1156                 goto out_sleep;
1157
1158         if (params->uapsd)
1159                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1160         else
1161                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1162
1163         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1164                                  CHANNEL_TYPE_EDCF,
1165                                  wl1251_tx_get_queue(queue), ps_scheme,
1166                                  WL1251_ACX_ACK_POLICY_LEGACY);
1167         if (ret < 0)
1168                 goto out_sleep;
1169
1170 out_sleep:
1171         wl1251_ps_elp_sleep(wl);
1172
1173 out:
1174         mutex_unlock(&wl->mutex);
1175
1176         return ret;
1177 }
1178
1179 /* can't be const, mac80211 writes to this */
1180 static struct ieee80211_supported_band wl1251_band_2ghz = {
1181         .channels = wl1251_channels,
1182         .n_channels = ARRAY_SIZE(wl1251_channels),
1183         .bitrates = wl1251_rates,
1184         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1185 };
1186
1187 static const struct ieee80211_ops wl1251_ops = {
1188         .start = wl1251_op_start,
1189         .stop = wl1251_op_stop,
1190         .add_interface = wl1251_op_add_interface,
1191         .remove_interface = wl1251_op_remove_interface,
1192         .config = wl1251_op_config,
1193         .configure_filter = wl1251_op_configure_filter,
1194         .tx = wl1251_op_tx,
1195         .set_key = wl1251_op_set_key,
1196         .hw_scan = wl1251_op_hw_scan,
1197         .bss_info_changed = wl1251_op_bss_info_changed,
1198         .set_rts_threshold = wl1251_op_set_rts_threshold,
1199         .conf_tx = wl1251_op_conf_tx,
1200 };
1201
1202 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1203 {
1204         unsigned long timeout;
1205
1206         wl1251_reg_write32(wl, EE_ADDR, offset);
1207         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1208
1209         /* EE_CTL_READ clears when data is ready */
1210         timeout = jiffies + msecs_to_jiffies(100);
1211         while (1) {
1212                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1213                         break;
1214
1215                 if (time_after(jiffies, timeout))
1216                         return -ETIMEDOUT;
1217
1218                 msleep(1);
1219         }
1220
1221         *data = wl1251_reg_read32(wl, EE_DATA);
1222         return 0;
1223 }
1224
1225 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1226                               u8 *data, size_t len)
1227 {
1228         size_t i;
1229         int ret;
1230
1231         wl1251_reg_write32(wl, EE_START, 0);
1232
1233         for (i = 0; i < len; i++) {
1234                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1235                 if (ret < 0)
1236                         return ret;
1237         }
1238
1239         return 0;
1240 }
1241
1242 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1243 {
1244         u8 mac[ETH_ALEN];
1245         int i, ret;
1246
1247         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1248
1249         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1250         if (ret < 0) {
1251                 wl1251_warning("failed to read MAC address from EEPROM");
1252                 return ret;
1253         }
1254
1255         /* MAC is stored in reverse order */
1256         for (i = 0; i < ETH_ALEN; i++)
1257                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1258
1259         return 0;
1260 }
1261
1262 static int wl1251_register_hw(struct wl1251 *wl)
1263 {
1264         int ret;
1265
1266         if (wl->mac80211_registered)
1267                 return 0;
1268
1269         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1270
1271         ret = ieee80211_register_hw(wl->hw);
1272         if (ret < 0) {
1273                 wl1251_error("unable to register mac80211 hw: %d", ret);
1274                 return ret;
1275         }
1276
1277         wl->mac80211_registered = true;
1278
1279         wl1251_notice("loaded");
1280
1281         return 0;
1282 }
1283
1284 int wl1251_init_ieee80211(struct wl1251 *wl)
1285 {
1286         int ret;
1287
1288         /* The tx descriptor buffer and the TKIP space */
1289         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1290                 + WL1251_TKIP_IV_SPACE;
1291
1292         /* unit us */
1293         /* FIXME: find a proper value */
1294         wl->hw->channel_change_time = 10000;
1295
1296         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1297                 IEEE80211_HW_NOISE_DBM |
1298                 IEEE80211_HW_SUPPORTS_PS |
1299                 IEEE80211_HW_BEACON_FILTER |
1300                 IEEE80211_HW_SUPPORTS_UAPSD;
1301
1302         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1303         wl->hw->wiphy->max_scan_ssids = 1;
1304         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1305
1306         wl->hw->queues = 4;
1307
1308         if (wl->use_eeprom)
1309                 wl1251_read_eeprom_mac(wl);
1310
1311         ret = wl1251_register_hw(wl);
1312         if (ret)
1313                 goto out;
1314
1315         wl1251_debugfs_init(wl);
1316         wl1251_notice("initialized");
1317
1318         ret = 0;
1319
1320 out:
1321         return ret;
1322 }
1323 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1324
1325 struct ieee80211_hw *wl1251_alloc_hw(void)
1326 {
1327         struct ieee80211_hw *hw;
1328         struct wl1251 *wl;
1329         int i;
1330         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1331
1332         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1333         if (!hw) {
1334                 wl1251_error("could not alloc ieee80211_hw");
1335                 return ERR_PTR(-ENOMEM);
1336         }
1337
1338         wl = hw->priv;
1339         memset(wl, 0, sizeof(*wl));
1340
1341         wl->hw = hw;
1342
1343         wl->data_in_count = 0;
1344
1345         skb_queue_head_init(&wl->tx_queue);
1346
1347         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1348         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1349         wl->channel = WL1251_DEFAULT_CHANNEL;
1350         wl->scanning = false;
1351         wl->default_key = 0;
1352         wl->listen_int = 1;
1353         wl->rx_counter = 0;
1354         wl->rx_handled = 0;
1355         wl->rx_current_buffer = 0;
1356         wl->rx_last_id = 0;
1357         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1358         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1359         wl->elp = false;
1360         wl->psm = 0;
1361         wl->psm_requested = false;
1362         wl->tx_queue_stopped = false;
1363         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1364         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1365         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1366         wl->vif = NULL;
1367
1368         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1369                 wl->tx_frames[i] = NULL;
1370
1371         wl->next_tx_complete = 0;
1372
1373         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1374         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1375
1376         /*
1377          * In case our MAC address is not correctly set,
1378          * we use a random but Nokia MAC.
1379          */
1380         memcpy(wl->mac_addr, nokia_oui, 3);
1381         get_random_bytes(wl->mac_addr + 3, 3);
1382
1383         wl->state = WL1251_STATE_OFF;
1384         mutex_init(&wl->mutex);
1385
1386         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1387         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1388
1389         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1390         if (!wl->rx_descriptor) {
1391                 wl1251_error("could not allocate memory for rx descriptor");
1392                 ieee80211_free_hw(hw);
1393                 return ERR_PTR(-ENOMEM);
1394         }
1395
1396         return hw;
1397 }
1398 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1399
1400 int wl1251_free_hw(struct wl1251 *wl)
1401 {
1402         ieee80211_unregister_hw(wl->hw);
1403
1404         wl1251_debugfs_exit(wl);
1405
1406         kfree(wl->target_mem_map);
1407         kfree(wl->data_path);
1408         vfree(wl->fw);
1409         wl->fw = NULL;
1410         kfree(wl->nvs);
1411         wl->nvs = NULL;
1412
1413         kfree(wl->rx_descriptor);
1414         wl->rx_descriptor = NULL;
1415
1416         ieee80211_free_hw(wl->hw);
1417
1418         return 0;
1419 }
1420 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1421
1422 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1423 MODULE_LICENSE("GPL");
1424 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1425 MODULE_FIRMWARE(WL1251_FW_NAME);