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 #include <linux/crc32.h>
  30 #include <linux/etherdevice.h>
  31
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "reg.h"
  35 #include "wl1251_io.h"
  36 #include "wl1251_cmd.h"
  37 #include "wl1251_event.h"
  38 #include "wl1251_tx.h"
  39 #include "wl1251_rx.h"
  40 #include "wl1251_ps.h"
  41 #include "wl1251_init.h"
  42 #include "wl1251_debugfs.h"
  43 #include "wl1251_boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static void wl1251_power_off(struct wl1251 *wl)
  56 {
  57         wl->set_power(false);
  58 }
  59
  60 static void wl1251_power_on(struct wl1251 *wl)
  61 {
  62         wl->set_power(true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         memcpy(wl->nvs, fw->data, wl->nvs_len);
 134
 135         ret = 0;
 136
 137 out:
 138         release_firmware(fw);
 139
 140         return ret;
 141 }
 142
 143 static void wl1251_fw_wakeup(struct wl1251 *wl)
 144 {
 145         u32 elp_reg;
 146
 147         elp_reg = ELPCTRL_WAKE_UP;
 148         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 149         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 150
 151         if (!(elp_reg & ELPCTRL_WLAN_READY))
 152                 wl1251_warning("WLAN not ready");
 153 }
 154
 155 static int wl1251_chip_wakeup(struct wl1251 *wl)
 156 {
 157         int ret = 0;
 158
 159         wl1251_power_on(wl);
 160         msleep(WL1251_POWER_ON_SLEEP);
 161         wl->if_ops->reset(wl);
 162
 163         /* We don't need a real memory partition here, because we only want
 164          * to use the registers at this point. */
 165         wl1251_set_partition(wl,
 166                              0x00000000,
 167                              0x00000000,
 168                              REGISTERS_BASE,
 169                              REGISTERS_DOWN_SIZE);
 170
 171         /* ELP module wake up */
 172         wl1251_fw_wakeup(wl);
 173
 174         /* whal_FwCtrl_BootSm() */
 175
 176         /* 0. read chip id from CHIP_ID */
 177         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 178
 179         /* 1. check if chip id is valid */
 180
 181         switch (wl->chip_id) {
 182         case CHIP_ID_1251_PG12:
 183                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 184                              wl->chip_id);
 185                 break;
 186         case CHIP_ID_1251_PG10:
 187         case CHIP_ID_1251_PG11:
 188         default:
 189                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 190                 ret = -ENODEV;
 191                 goto out;
 192         }
 193
 194         if (wl->fw == NULL) {
 195                 ret = wl1251_fetch_firmware(wl);
 196                 if (ret < 0)
 197                         goto out;
 198         }
 199
 200         /* No NVS from netlink, try to get it from the filesystem */
 201         if (wl->nvs == NULL) {
 202                 ret = wl1251_fetch_nvs(wl);
 203                 if (ret < 0)
 204                         goto out;
 205         }
 206
 207 out:
 208         return ret;
 209 }
 210
 211 static void wl1251_irq_work(struct work_struct *work)
 212 {
 213         u32 intr;
 214         struct wl1251 *wl =
 215                 container_of(work, struct wl1251, irq_work);
 216         int ret;
 217
 218         mutex_lock(&wl->mutex);
 219
 220         wl1251_debug(DEBUG_IRQ, "IRQ work");
 221
 222         if (wl->state == WL1251_STATE_OFF)
 223                 goto out;
 224
 225         ret = wl1251_ps_elp_wakeup(wl);
 226         if (ret < 0)
 227                 goto out;
 228
 229         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 230
 231         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 232         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 233
 234         if (wl->data_path) {
 235                 wl->rx_counter =
 236                         wl1251_mem_read32(wl, wl->data_path->rx_control_addr);
 237
 238                 /* We handle a frmware bug here */
 239                 switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 240                 case 0:
 241                         wl1251_debug(DEBUG_IRQ, "RX: FW and host in sync");
 242                         intr &= ~WL1251_ACX_INTR_RX0_DATA;
 243                         intr &= ~WL1251_ACX_INTR_RX1_DATA;
 244                         break;
 245                 case 1:
 246                         wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 247                         intr |= WL1251_ACX_INTR_RX0_DATA;
 248                         intr &= ~WL1251_ACX_INTR_RX1_DATA;
 249                         break;
 250                 case 2:
 251                         wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 252                         intr |= WL1251_ACX_INTR_RX0_DATA;
 253                         intr |= WL1251_ACX_INTR_RX1_DATA;
 254                         break;
 255                 default:
 256                         wl1251_warning("RX: FW and host out of sync: %d",
 257                                        wl->rx_counter - wl->rx_handled);
 258                         break;
 259                 }
 260
 261                 wl->rx_handled = wl->rx_counter;
 262
 263
 264                 wl1251_debug(DEBUG_IRQ, "RX counter: %d", wl->rx_counter);
 265         }
 266
 267         intr &= wl->intr_mask;
 268
 269         if (intr == 0) {
 270                 wl1251_debug(DEBUG_IRQ, "INTR is 0");
 271                 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
 272                                    ~(wl->intr_mask));
 273
 274                 goto out_sleep;
 275         }
 276
 277         if (intr & WL1251_ACX_INTR_RX0_DATA) {
 278                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 279                 wl1251_rx(wl);
 280         }
 281
 282         if (intr & WL1251_ACX_INTR_RX1_DATA) {
 283                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 284                 wl1251_rx(wl);
 285         }
 286
 287         if (intr & WL1251_ACX_INTR_TX_RESULT) {
 288                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 289                 wl1251_tx_complete(wl);
 290         }
 291
 292         if (intr & (WL1251_ACX_INTR_EVENT_A | WL1251_ACX_INTR_EVENT_B)) {
 293                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)", intr);
 294                 if (intr & WL1251_ACX_INTR_EVENT_A)
 295                         wl1251_event_handle(wl, 0);
 296                 else
 297                         wl1251_event_handle(wl, 1);
 298         }
 299
 300         if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 301                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_INIT_COMPLETE");
 302
 303         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 304
 305 out_sleep:
 306         wl1251_ps_elp_sleep(wl);
 307
 308 out:
 309         mutex_unlock(&wl->mutex);
 310 }
 311
 312 static void wl1251_filter_work(struct work_struct *work)
 313 {
 314         struct wl1251 *wl =
 315                 container_of(work, struct wl1251, filter_work);
 316         int ret;
 317
 318         mutex_lock(&wl->mutex);
 319
 320         if (wl->state == WL1251_STATE_OFF)
 321                 goto out;
 322
 323         ret = wl1251_ps_elp_wakeup(wl);
 324         if (ret < 0)
 325                 goto out;
 326
 327         ret = wl1251_cmd_join(wl, wl->bss_type, wl->beacon_int,
 328                                    wl->dtim_period);
 329         if (ret < 0)
 330                 goto out_sleep;
 331
 332 out_sleep:
 333         wl1251_ps_elp_sleep(wl);
 334
 335 out:
 336         mutex_unlock(&wl->mutex);
 337 }
 338
 339 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 340 {
 341         struct wl1251 *wl = hw->priv;
 342
 343         skb_queue_tail(&wl->tx_queue, skb);
 344
 345         /*
 346          * The chip specific setup must run before the first TX packet -
 347          * before that, the tx_work will not be initialized!
 348          */
 349
 350         schedule_work(&wl->tx_work);
 351
 352         /*
 353          * The workqueue is slow to process the tx_queue and we need stop
 354          * the queue here, otherwise the queue will get too long.
 355          */
 356         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 357                 ieee80211_stop_queues(wl->hw);
 358
 359                 /*
 360                  * FIXME: this is racy, the variable is not properly
 361                  * protected. Maybe fix this by removing the stupid
 362                  * variable altogether and checking the real queue state?
 363                  */
 364                 wl->tx_queue_stopped = true;
 365         }
 366
 367         return NETDEV_TX_OK;
 368 }
 369
 370 static int wl1251_op_start(struct ieee80211_hw *hw)
 371 {
 372         struct wl1251 *wl = hw->priv;
 373         int ret = 0;
 374
 375         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 376
 377         mutex_lock(&wl->mutex);
 378
 379         if (wl->state != WL1251_STATE_OFF) {
 380                 wl1251_error("cannot start because not in off state: %d",
 381                              wl->state);
 382                 ret = -EBUSY;
 383                 goto out;
 384         }
 385
 386         ret = wl1251_chip_wakeup(wl);
 387         if (ret < 0)
 388                 goto out;
 389
 390         ret = wl1251_boot(wl);
 391         if (ret < 0)
 392                 goto out;
 393
 394         ret = wl1251_hw_init(wl);
 395         if (ret < 0)
 396                 goto out;
 397
 398         ret = wl1251_acx_station_id(wl);
 399         if (ret < 0)
 400                 goto out;
 401
 402         wl->state = WL1251_STATE_ON;
 403
 404         wl1251_info("firmware booted (%s)", wl->fw_ver);
 405
 406 out:
 407         if (ret < 0)
 408                 wl1251_power_off(wl);
 409
 410         mutex_unlock(&wl->mutex);
 411
 412         return ret;
 413 }
 414
 415 static void wl1251_op_stop(struct ieee80211_hw *hw)
 416 {
 417         struct wl1251 *wl = hw->priv;
 418
 419         wl1251_info("down");
 420
 421         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 422
 423         mutex_lock(&wl->mutex);
 424
 425         WARN_ON(wl->state != WL1251_STATE_ON);
 426
 427         if (wl->scanning) {
 428                 mutex_unlock(&wl->mutex);
 429                 ieee80211_scan_completed(wl->hw, true);
 430                 mutex_lock(&wl->mutex);
 431                 wl->scanning = false;
 432         }
 433
 434         wl->state = WL1251_STATE_OFF;
 435
 436         wl1251_disable_interrupts(wl);
 437
 438         mutex_unlock(&wl->mutex);
 439
 440         cancel_work_sync(&wl->irq_work);
 441         cancel_work_sync(&wl->tx_work);
 442         cancel_work_sync(&wl->filter_work);
 443
 444         mutex_lock(&wl->mutex);
 445
 446         /* let's notify MAC80211 about the remaining pending TX frames */
 447         wl1251_tx_flush(wl);
 448         wl1251_power_off(wl);
 449
 450         memset(wl->bssid, 0, ETH_ALEN);
 451         wl->listen_int = 1;
 452         wl->bss_type = MAX_BSS_TYPE;
 453
 454         wl->data_in_count = 0;
 455         wl->rx_counter = 0;
 456         wl->rx_handled = 0;
 457         wl->rx_current_buffer = 0;
 458         wl->rx_last_id = 0;
 459         wl->next_tx_complete = 0;
 460         wl->elp = false;
 461         wl->psm = 0;
 462         wl->tx_queue_stopped = false;
 463         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 464         wl->channel = WL1251_DEFAULT_CHANNEL;
 465
 466         wl1251_debugfs_reset(wl);
 467
 468         mutex_unlock(&wl->mutex);
 469 }
 470
 471 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 472                                    struct ieee80211_if_init_conf *conf)
 473 {
 474         struct wl1251 *wl = hw->priv;
 475         int ret = 0;
 476
 477         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 478                      conf->type, conf->mac_addr);
 479
 480         mutex_lock(&wl->mutex);
 481
 482         switch (conf->type) {
 483         case NL80211_IFTYPE_STATION:
 484                 wl->bss_type = BSS_TYPE_STA_BSS;
 485                 break;
 486         case NL80211_IFTYPE_ADHOC:
 487                 wl->bss_type = BSS_TYPE_IBSS;
 488                 break;
 489         default:
 490                 ret = -EOPNOTSUPP;
 491                 goto out;
 492         }
 493
 494         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 495                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 496                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 497                 ret = wl1251_acx_station_id(wl);
 498                 if (ret < 0)
 499                         goto out;
 500         }
 501
 502 out:
 503         mutex_unlock(&wl->mutex);
 504         return ret;
 505 }
 506
 507 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 508                                          struct ieee80211_if_init_conf *conf)
 509 {
 510         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 511 }
 512
 513 static int wl1251_build_null_data(struct wl1251 *wl)
 514 {
 515         struct wl12xx_null_data_template template;
 516
 517         if (!is_zero_ether_addr(wl->bssid)) {
 518                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 519                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 520         } else {
 521                 memset(template.header.da, 0xff, ETH_ALEN);
 522                 memset(template.header.bssid, 0xff, ETH_ALEN);
 523         }
 524
 525         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 526         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 527                                                 IEEE80211_STYPE_NULLFUNC);
 528
 529         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
 530                                        sizeof(template));
 531
 532 }
 533
 534 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
 535 {
 536         struct wl12xx_ps_poll_template template;
 537
 538         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 539         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 540         template.aid = aid;
 541         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 542
 543         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
 544                                        sizeof(template));
 545
 546 }
 547
 548 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 549 {
 550         struct wl1251 *wl = hw->priv;
 551         struct ieee80211_conf *conf = &hw->conf;
 552         int channel, ret = 0;
 553
 554         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 555
 556         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 557                      channel,
 558                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 559                      conf->power_level);
 560
 561         mutex_lock(&wl->mutex);
 562
 563         ret = wl1251_ps_elp_wakeup(wl);
 564         if (ret < 0)
 565                 goto out;
 566
 567         if (channel != wl->channel) {
 568                 ret = wl1251_cmd_join(wl, wl->bss_type, wl->beacon_int,
 569                                            wl->dtim_period);
 570                 if (ret < 0)
 571                         goto out_sleep;
 572
 573                 wl->channel = channel;
 574         }
 575
 576         ret = wl1251_build_null_data(wl);
 577         if (ret < 0)
 578                 goto out_sleep;
 579
 580         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 581                 wl1251_debug(DEBUG_PSM, "psm enabled");
 582
 583                 wl->psm_requested = true;
 584
 585                 /*
 586                  * We enter PSM only if we're already associated.
 587                  * If we're not, we'll enter it when joining an SSID,
 588                  * through the bss_info_changed() hook.
 589                  */
 590                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 591         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 592                    wl->psm_requested) {
 593                 wl1251_debug(DEBUG_PSM, "psm disabled");
 594
 595                 wl->psm_requested = false;
 596
 597                 if (wl->psm)
 598                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 599         }
 600
 601         if (conf->power_level != wl->power_level) {
 602                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 603                 if (ret < 0)
 604                         goto out;
 605
 606                 wl->power_level = conf->power_level;
 607         }
 608
 609 out_sleep:
 610         wl1251_ps_elp_sleep(wl);
 611
 612 out:
 613         mutex_unlock(&wl->mutex);
 614
 615         return ret;
 616 }
 617
 618 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 619                                   FIF_ALLMULTI | \
 620                                   FIF_FCSFAIL | \
 621                                   FIF_BCN_PRBRESP_PROMISC | \
 622                                   FIF_CONTROL | \
 623                                   FIF_OTHER_BSS)
 624
 625 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 626                                        unsigned int changed,
 627                                        unsigned int *total,
 628                                        int mc_count,
 629                                        struct dev_addr_list *mc_list)
 630 {
 631         struct wl1251 *wl = hw->priv;
 632
 633         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 634
 635         *total &= WL1251_SUPPORTED_FILTERS;
 636         changed &= WL1251_SUPPORTED_FILTERS;
 637
 638         if (changed == 0)
 639                 /* no filters which we support changed */
 640                 return;
 641
 642         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 643
 644         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 645         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 646
 647         if (*total & FIF_PROMISC_IN_BSS) {
 648                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 649                 wl->rx_config |= CFG_RX_ALL_GOOD;
 650         }
 651         if (*total & FIF_ALLMULTI)
 652                 /*
 653                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 654                  * all multicast frames
 655                  */
 656                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 657         if (*total & FIF_FCSFAIL)
 658                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 659         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 660                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 661                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 662         }
 663         if (*total & FIF_CONTROL)
 664                 wl->rx_filter |= CFG_RX_CTL_EN;
 665         if (*total & FIF_OTHER_BSS)
 666                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 667
 668         /*
 669          * FIXME: workqueues need to be properly cancelled on stop(), for
 670          * now let's just disable changing the filter settings. They will
 671          * be updated any on config().
 672          */
 673         /* schedule_work(&wl->filter_work); */
 674 }
 675
 676 /* HW encryption */
 677 static int wl1251_set_key_type(struct wl1251 *wl,
 678                                struct wl1251_cmd_set_keys *key,
 679                                enum set_key_cmd cmd,
 680                                struct ieee80211_key_conf *mac80211_key,
 681                                const u8 *addr)
 682 {
 683         switch (mac80211_key->alg) {
 684         case ALG_WEP:
 685                 if (is_broadcast_ether_addr(addr))
 686                         key->key_type = KEY_WEP_DEFAULT;
 687                 else
 688                         key->key_type = KEY_WEP_ADDR;
 689
 690                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 691                 break;
 692         case ALG_TKIP:
 693                 if (is_broadcast_ether_addr(addr))
 694                         key->key_type = KEY_TKIP_MIC_GROUP;
 695                 else
 696                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 697
 698                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 699                 break;
 700         case ALG_CCMP:
 701                 if (is_broadcast_ether_addr(addr))
 702                         key->key_type = KEY_AES_GROUP;
 703                 else
 704                         key->key_type = KEY_AES_PAIRWISE;
 705                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 706                 break;
 707         default:
 708                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 709                 return -EOPNOTSUPP;
 710         }
 711
 712         return 0;
 713 }
 714
 715 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 716                              struct ieee80211_vif *vif,
 717                              struct ieee80211_sta *sta,
 718                              struct ieee80211_key_conf *key)
 719 {
 720         struct wl1251 *wl = hw->priv;
 721         struct wl1251_cmd_set_keys *wl_cmd;
 722         const u8 *addr;
 723         int ret;
 724
 725         static const u8 bcast_addr[ETH_ALEN] =
 726                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 727
 728         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 729
 730         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 731         if (!wl_cmd) {
 732                 ret = -ENOMEM;
 733                 goto out;
 734         }
 735
 736         addr = sta ? sta->addr : bcast_addr;
 737
 738         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 739         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 740         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 741                      key->alg, key->keyidx, key->keylen, key->flags);
 742         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 743
 744         if (is_zero_ether_addr(addr)) {
 745                 /* We dont support TX only encryption */
 746                 ret = -EOPNOTSUPP;
 747                 goto out;
 748         }
 749
 750         mutex_lock(&wl->mutex);
 751
 752         ret = wl1251_ps_elp_wakeup(wl);
 753         if (ret < 0)
 754                 goto out_unlock;
 755
 756         switch (cmd) {
 757         case SET_KEY:
 758                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 759                 break;
 760         case DISABLE_KEY:
 761                 wl_cmd->key_action = KEY_REMOVE;
 762                 break;
 763         default:
 764                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 765                 break;
 766         }
 767
 768         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 769         if (ret < 0) {
 770                 wl1251_error("Set KEY type failed");
 771                 goto out_sleep;
 772         }
 773
 774         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 775                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 776
 777         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 778             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 779                 /*
 780                  * We get the key in the following form:
 781                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 782                  * but the target is expecting:
 783                  * TKIP - RX MIC - TX MIC
 784                  */
 785                 memcpy(wl_cmd->key, key->key, 16);
 786                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 787                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 788
 789         } else {
 790                 memcpy(wl_cmd->key, key->key, key->keylen);
 791         }
 792         wl_cmd->key_size = key->keylen;
 793
 794         wl_cmd->id = key->keyidx;
 795         wl_cmd->ssid_profile = 0;
 796
 797         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 798
 799         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 800         if (ret < 0) {
 801                 wl1251_warning("could not set keys");
 802                 goto out_sleep;
 803         }
 804
 805 out_sleep:
 806         wl1251_ps_elp_sleep(wl);
 807
 808 out_unlock:
 809         mutex_unlock(&wl->mutex);
 810
 811 out:
 812         kfree(wl_cmd);
 813
 814         return ret;
 815 }
 816
 817 static int wl1251_build_basic_rates(char *rates)
 818 {
 819         u8 index = 0;
 820
 821         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 822         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 823         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 824         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 825
 826         return index;
 827 }
 828
 829 static int wl1251_build_extended_rates(char *rates)
 830 {
 831         u8 index = 0;
 832
 833         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 834         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 835         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 836         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 837         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 838         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 839         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 840         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 841
 842         return index;
 843 }
 844
 845
 846 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
 847 {
 848         struct wl12xx_probe_req_template template;
 849         struct wl12xx_ie_rates *rates;
 850         char *ptr;
 851         u16 size;
 852
 853         ptr = (char *)&template;
 854         size = sizeof(struct ieee80211_header);
 855
 856         memset(template.header.da, 0xff, ETH_ALEN);
 857         memset(template.header.bssid, 0xff, ETH_ALEN);
 858         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 859         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 860
 861         /* IEs */
 862         /* SSID */
 863         template.ssid.header.id = WLAN_EID_SSID;
 864         template.ssid.header.len = ssid_len;
 865         if (ssid_len && ssid)
 866                 memcpy(template.ssid.ssid, ssid, ssid_len);
 867         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 868         ptr += size;
 869
 870         /* Basic Rates */
 871         rates = (struct wl12xx_ie_rates *)ptr;
 872         rates->header.id = WLAN_EID_SUPP_RATES;
 873         rates->header.len = wl1251_build_basic_rates(rates->rates);
 874         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 875         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 876
 877         /* Extended rates */
 878         rates = (struct wl12xx_ie_rates *)ptr;
 879         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 880         rates->header.len = wl1251_build_extended_rates(rates->rates);
 881         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 882
 883         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 884
 885         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 886                                       size);
 887 }
 888
 889 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
 890                           u8 active_scan, u8 high_prio, u8 num_channels,
 891                           u8 probe_requests)
 892 {
 893         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
 894         struct cmd_scan *params = NULL;
 895         int i, ret;
 896         u16 scan_options = 0;
 897
 898         if (wl->scanning)
 899                 return -EINVAL;
 900
 901         params = kzalloc(sizeof(*params), GFP_KERNEL);
 902         if (!params)
 903                 return -ENOMEM;
 904
 905         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 906         params->params.rx_filter_options =
 907                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 908
 909         /* High priority scan */
 910         if (!active_scan)
 911                 scan_options |= SCAN_PASSIVE;
 912         if (high_prio)
 913                 scan_options |= SCAN_PRIORITY_HIGH;
 914         params->params.scan_options = scan_options;
 915
 916         params->params.num_channels = num_channels;
 917         params->params.num_probe_requests = probe_requests;
 918         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 919         params->params.tid_trigger = 0;
 920
 921         for (i = 0; i < num_channels; i++) {
 922                 params->channels[i].min_duration = cpu_to_le32(30000);
 923                 params->channels[i].max_duration = cpu_to_le32(60000);
 924                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 925                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 926                 params->channels[i].early_termination = 0;
 927                 params->channels[i].tx_power_att = 0;
 928                 params->channels[i].channel = i + 1;
 929                 memset(params->channels[i].pad, 0, 3);
 930         }
 931
 932         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 933                 memset(&params->channels[i], 0,
 934                        sizeof(struct basic_scan_channel_parameters));
 935
 936         if (len && ssid) {
 937                 params->params.ssid_len = len;
 938                 memcpy(params->params.ssid, ssid, len);
 939         } else {
 940                 params->params.ssid_len = 0;
 941                 memset(params->params.ssid, 0, 32);
 942         }
 943
 944         ret = wl1251_build_probe_req(wl, ssid, len);
 945         if (ret < 0) {
 946                 wl1251_error("PROBE request template failed");
 947                 goto out;
 948         }
 949
 950         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
 951         if (!trigger)
 952                 goto out;
 953
 954         trigger->timeout = 0;
 955
 956         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
 957                               sizeof(*trigger));
 958         if (ret < 0) {
 959                 wl1251_error("trigger scan to failed for hw scan");
 960                 goto out;
 961         }
 962
 963         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
 964
 965         wl->scanning = true;
 966
 967         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 968         if (ret < 0)
 969                 wl1251_error("SCAN failed");
 970
 971         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
 972
 973         if (params->header.status != CMD_STATUS_SUCCESS) {
 974                 wl1251_error("TEST command answer error: %d",
 975                              params->header.status);
 976                 wl->scanning = false;
 977                 ret = -EIO;
 978                 goto out;
 979         }
 980
 981 out:
 982         kfree(params);
 983         return ret;
 984
 985 }
 986
 987 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 988                              struct cfg80211_scan_request *req)
 989 {
 990         struct wl1251 *wl = hw->priv;
 991         int ret;
 992         u8 *ssid = NULL;
 993         size_t ssid_len = 0;
 994
 995         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 996
 997         if (req->n_ssids) {
 998                 ssid = req->ssids[0].ssid;
 999                 ssid_len = req->ssids[0].ssid_len;
1000         }
1001
1002         mutex_lock(&wl->mutex);
1003
1004         ret = wl1251_ps_elp_wakeup(wl);
1005         if (ret < 0)
1006                 goto out;
1007
1008         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1009
1010         wl1251_ps_elp_sleep(wl);
1011
1012 out:
1013         mutex_unlock(&wl->mutex);
1014
1015         return ret;
1016 }
1017
1018 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1019 {
1020         struct wl1251 *wl = hw->priv;
1021         int ret;
1022
1023         mutex_lock(&wl->mutex);
1024
1025         ret = wl1251_ps_elp_wakeup(wl);
1026         if (ret < 0)
1027                 goto out;
1028
1029         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1030         if (ret < 0)
1031                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1032
1033         wl1251_ps_elp_sleep(wl);
1034
1035 out:
1036         mutex_unlock(&wl->mutex);
1037
1038         return ret;
1039 }
1040
1041 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1042                                        struct ieee80211_vif *vif,
1043                                        struct ieee80211_bss_conf *bss_conf,
1044                                        u32 changed)
1045 {
1046         enum wl1251_cmd_ps_mode mode;
1047         struct wl1251 *wl = hw->priv;
1048         struct sk_buff *beacon;
1049         int ret;
1050
1051         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1052
1053         mutex_lock(&wl->mutex);
1054
1055         ret = wl1251_ps_elp_wakeup(wl);
1056         if (ret < 0)
1057                 goto out;
1058
1059         if (changed & BSS_CHANGED_ASSOC) {
1060                 if (bss_conf->assoc) {
1061                         wl->beacon_int = bss_conf->beacon_int;
1062                         wl->dtim_period = bss_conf->dtim_period;
1063
1064                         /* FIXME: call join */
1065
1066                         wl->aid = bss_conf->aid;
1067
1068                         ret = wl1251_build_ps_poll(wl, wl->aid);
1069                         if (ret < 0)
1070                                 goto out_sleep;
1071
1072                         ret = wl1251_acx_aid(wl, wl->aid);
1073                         if (ret < 0)
1074                                 goto out_sleep;
1075
1076                         /* If we want to go in PSM but we're not there yet */
1077                         if (wl->psm_requested && !wl->psm) {
1078                                 mode = STATION_POWER_SAVE_MODE;
1079                                 ret = wl1251_ps_set_mode(wl, mode);
1080                                 if (ret < 0)
1081                                         goto out_sleep;
1082                         }
1083                 } else {
1084                         /* use defaults when not associated */
1085                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1086                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1087                 }
1088         }
1089         if (changed & BSS_CHANGED_ERP_SLOT) {
1090                 if (bss_conf->use_short_slot)
1091                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1092                 else
1093                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1094                 if (ret < 0) {
1095                         wl1251_warning("Set slot time failed %d", ret);
1096                         goto out_sleep;
1097                 }
1098         }
1099
1100         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1101                 if (bss_conf->use_short_preamble)
1102                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1103                 else
1104                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1105         }
1106
1107         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1108                 if (bss_conf->use_cts_prot)
1109                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1110                 else
1111                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1112                 if (ret < 0) {
1113                         wl1251_warning("Set ctsprotect failed %d", ret);
1114                         goto out;
1115                 }
1116         }
1117
1118         if (changed & BSS_CHANGED_BSSID) {
1119                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1120
1121                 ret = wl1251_build_null_data(wl);
1122                 if (ret < 0)
1123                         goto out;
1124
1125                 if (wl->bss_type != BSS_TYPE_IBSS) {
1126                         ret = wl1251_cmd_join(wl, wl->bss_type,
1127                                               wl->beacon_int,
1128                                               wl->dtim_period);
1129                         if (ret < 0)
1130                                 goto out_sleep;
1131                         wl1251_warning("Set ctsprotect failed %d", ret);
1132                         goto out_sleep;
1133                 }
1134         }
1135
1136         if (changed & BSS_CHANGED_BEACON) {
1137                 beacon = ieee80211_beacon_get(hw, vif);
1138                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1139                                               beacon->len);
1140
1141                 if (ret < 0) {
1142                         dev_kfree_skb(beacon);
1143                         goto out;
1144                 }
1145
1146                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1147                                               beacon->len);
1148
1149                 dev_kfree_skb(beacon);
1150
1151                 if (ret < 0)
1152                         goto out;
1153
1154                 ret = wl1251_cmd_join(wl, wl->bss_type, wl->beacon_int,
1155                                       wl->dtim_period);
1156
1157                 if (ret < 0)
1158                         goto out;
1159         }
1160
1161 out_sleep:
1162         wl1251_ps_elp_sleep(wl);
1163
1164 out:
1165         mutex_unlock(&wl->mutex);
1166 }
1167
1168
1169 /* can't be const, mac80211 writes to this */
1170 static struct ieee80211_rate wl1251_rates[] = {
1171         { .bitrate = 10,
1172           .hw_value = 0x1,
1173           .hw_value_short = 0x1, },
1174         { .bitrate = 20,
1175           .hw_value = 0x2,
1176           .hw_value_short = 0x2,
1177           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1178         { .bitrate = 55,
1179           .hw_value = 0x4,
1180           .hw_value_short = 0x4,
1181           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1182         { .bitrate = 110,
1183           .hw_value = 0x20,
1184           .hw_value_short = 0x20,
1185           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1186         { .bitrate = 60,
1187           .hw_value = 0x8,
1188           .hw_value_short = 0x8, },
1189         { .bitrate = 90,
1190           .hw_value = 0x10,
1191           .hw_value_short = 0x10, },
1192         { .bitrate = 120,
1193           .hw_value = 0x40,
1194           .hw_value_short = 0x40, },
1195         { .bitrate = 180,
1196           .hw_value = 0x80,
1197           .hw_value_short = 0x80, },
1198         { .bitrate = 240,
1199           .hw_value = 0x200,
1200           .hw_value_short = 0x200, },
1201         { .bitrate = 360,
1202          .hw_value = 0x400,
1203          .hw_value_short = 0x400, },
1204         { .bitrate = 480,
1205           .hw_value = 0x800,
1206           .hw_value_short = 0x800, },
1207         { .bitrate = 540,
1208           .hw_value = 0x1000,
1209           .hw_value_short = 0x1000, },
1210 };
1211
1212 /* can't be const, mac80211 writes to this */
1213 static struct ieee80211_channel wl1251_channels[] = {
1214         { .hw_value = 1, .center_freq = 2412},
1215         { .hw_value = 2, .center_freq = 2417},
1216         { .hw_value = 3, .center_freq = 2422},
1217         { .hw_value = 4, .center_freq = 2427},
1218         { .hw_value = 5, .center_freq = 2432},
1219         { .hw_value = 6, .center_freq = 2437},
1220         { .hw_value = 7, .center_freq = 2442},
1221         { .hw_value = 8, .center_freq = 2447},
1222         { .hw_value = 9, .center_freq = 2452},
1223         { .hw_value = 10, .center_freq = 2457},
1224         { .hw_value = 11, .center_freq = 2462},
1225         { .hw_value = 12, .center_freq = 2467},
1226         { .hw_value = 13, .center_freq = 2472},
1227 };
1228
1229 /* can't be const, mac80211 writes to this */
1230 static struct ieee80211_supported_band wl1251_band_2ghz = {
1231         .channels = wl1251_channels,
1232         .n_channels = ARRAY_SIZE(wl1251_channels),
1233         .bitrates = wl1251_rates,
1234         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1235 };
1236
1237 static const struct ieee80211_ops wl1251_ops = {
1238         .start = wl1251_op_start,
1239         .stop = wl1251_op_stop,
1240         .add_interface = wl1251_op_add_interface,
1241         .remove_interface = wl1251_op_remove_interface,
1242         .config = wl1251_op_config,
1243         .configure_filter = wl1251_op_configure_filter,
1244         .tx = wl1251_op_tx,
1245         .set_key = wl1251_op_set_key,
1246         .hw_scan = wl1251_op_hw_scan,
1247         .bss_info_changed = wl1251_op_bss_info_changed,
1248         .set_rts_threshold = wl1251_op_set_rts_threshold,
1249 };
1250
1251 static int wl1251_register_hw(struct wl1251 *wl)
1252 {
1253         int ret;
1254
1255         if (wl->mac80211_registered)
1256                 return 0;
1257
1258         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1259
1260         ret = ieee80211_register_hw(wl->hw);
1261         if (ret < 0) {
1262                 wl1251_error("unable to register mac80211 hw: %d", ret);
1263                 return ret;
1264         }
1265
1266         wl->mac80211_registered = true;
1267
1268         wl1251_notice("loaded");
1269
1270         return 0;
1271 }
1272
1273 int wl1251_init_ieee80211(struct wl1251 *wl)
1274 {
1275         int ret;
1276
1277         /* The tx descriptor buffer and the TKIP space */
1278         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1279                 + WL1251_TKIP_IV_SPACE;
1280
1281         /* unit us */
1282         /* FIXME: find a proper value */
1283         wl->hw->channel_change_time = 10000;
1284
1285         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1286                 IEEE80211_HW_NOISE_DBM;
1287
1288         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1289         wl->hw->wiphy->max_scan_ssids = 1;
1290         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1291
1292         ret = wl1251_register_hw(wl);
1293         if (ret)
1294                 goto out;
1295
1296         wl1251_debugfs_init(wl);
1297         wl1251_notice("initialized");
1298
1299         ret = 0;
1300
1301 out:
1302         return ret;
1303 }
1304 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1305
1306 struct ieee80211_hw *wl1251_alloc_hw(void)
1307 {
1308         struct ieee80211_hw *hw;
1309         struct wl1251 *wl;
1310         int i;
1311         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1312
1313         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1314         if (!hw) {
1315                 wl1251_error("could not alloc ieee80211_hw");
1316                 return ERR_PTR(-ENOMEM);
1317         }
1318
1319         wl = hw->priv;
1320         memset(wl, 0, sizeof(*wl));
1321
1322         wl->hw = hw;
1323
1324         wl->data_in_count = 0;
1325
1326         skb_queue_head_init(&wl->tx_queue);
1327
1328         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1329         wl->channel = WL1251_DEFAULT_CHANNEL;
1330         wl->scanning = false;
1331         wl->default_key = 0;
1332         wl->listen_int = 1;
1333         wl->rx_counter = 0;
1334         wl->rx_handled = 0;
1335         wl->rx_current_buffer = 0;
1336         wl->rx_last_id = 0;
1337         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1338         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1339         wl->elp = false;
1340         wl->psm = 0;
1341         wl->psm_requested = false;
1342         wl->tx_queue_stopped = false;
1343         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1344         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1345         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1346
1347         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1348                 wl->tx_frames[i] = NULL;
1349
1350         wl->next_tx_complete = 0;
1351
1352         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1353         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1354
1355         /*
1356          * In case our MAC address is not correctly set,
1357          * we use a random but Nokia MAC.
1358          */
1359         memcpy(wl->mac_addr, nokia_oui, 3);
1360         get_random_bytes(wl->mac_addr + 3, 3);
1361
1362         wl->state = WL1251_STATE_OFF;
1363         mutex_init(&wl->mutex);
1364
1365         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1366         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1367
1368         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1369         if (!wl->rx_descriptor) {
1370                 wl1251_error("could not allocate memory for rx descriptor");
1371                 ieee80211_free_hw(hw);
1372                 return ERR_PTR(-ENOMEM);
1373         }
1374
1375         return hw;
1376 }
1377 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1378
1379 int wl1251_free_hw(struct wl1251 *wl)
1380 {
1381         ieee80211_unregister_hw(wl->hw);
1382
1383         wl1251_debugfs_exit(wl);
1384
1385         kfree(wl->target_mem_map);
1386         kfree(wl->data_path);
1387         kfree(wl->fw);
1388         wl->fw = NULL;
1389         kfree(wl->nvs);
1390         wl->nvs = NULL;
1391
1392         kfree(wl->rx_descriptor);
1393         wl->rx_descriptor = NULL;
1394
1395         ieee80211_free_hw(wl->hw);
1396
1397         return 0;
1398 }
1399 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1400
1401 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1402 MODULE_LICENSE("GPL");
1403 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
1404 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");