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 "wl1251_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 int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 313                        u16 beacon_interval, u8 dtim_period)
 314 {
 315         int ret;
 316
 317         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 318                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 319                                      wl->tx_mgmt_frm_rate,
 320                                      wl->tx_mgmt_frm_mod);
 321         if (ret < 0)
 322                 goto out;
 323
 324
 325         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 326                               dtim_period);
 327         if (ret < 0)
 328                 goto out;
 329
 330         /*
 331          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
 332          * locking we just sleep instead, for now
 333          */
 334         msleep(10);
 335
 336 out:
 337         return ret;
 338 }
 339
 340 static void wl1251_filter_work(struct work_struct *work)
 341 {
 342         struct wl1251 *wl =
 343                 container_of(work, struct wl1251, filter_work);
 344         int ret;
 345
 346         mutex_lock(&wl->mutex);
 347
 348         if (wl->state == WL1251_STATE_OFF)
 349                 goto out;
 350
 351         ret = wl1251_ps_elp_wakeup(wl);
 352         if (ret < 0)
 353                 goto out;
 354
 355         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
 356                           wl->dtim_period);
 357         if (ret < 0)
 358                 goto out_sleep;
 359
 360 out_sleep:
 361         wl1251_ps_elp_sleep(wl);
 362
 363 out:
 364         mutex_unlock(&wl->mutex);
 365 }
 366
 367 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 368 {
 369         struct wl1251 *wl = hw->priv;
 370
 371         skb_queue_tail(&wl->tx_queue, skb);
 372
 373         /*
 374          * The chip specific setup must run before the first TX packet -
 375          * before that, the tx_work will not be initialized!
 376          */
 377
 378         ieee80211_queue_work(wl->hw, &wl->tx_work);
 379
 380         /*
 381          * The workqueue is slow to process the tx_queue and we need stop
 382          * the queue here, otherwise the queue will get too long.
 383          */
 384         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
 385                 ieee80211_stop_queues(wl->hw);
 386
 387                 /*
 388                  * FIXME: this is racy, the variable is not properly
 389                  * protected. Maybe fix this by removing the stupid
 390                  * variable altogether and checking the real queue state?
 391                  */
 392                 wl->tx_queue_stopped = true;
 393         }
 394
 395         return NETDEV_TX_OK;
 396 }
 397
 398 static int wl1251_op_start(struct ieee80211_hw *hw)
 399 {
 400         struct wl1251 *wl = hw->priv;
 401         int ret = 0;
 402
 403         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 404
 405         mutex_lock(&wl->mutex);
 406
 407         if (wl->state != WL1251_STATE_OFF) {
 408                 wl1251_error("cannot start because not in off state: %d",
 409                              wl->state);
 410                 ret = -EBUSY;
 411                 goto out;
 412         }
 413
 414         ret = wl1251_chip_wakeup(wl);
 415         if (ret < 0)
 416                 goto out;
 417
 418         ret = wl1251_boot(wl);
 419         if (ret < 0)
 420                 goto out;
 421
 422         ret = wl1251_hw_init(wl);
 423         if (ret < 0)
 424                 goto out;
 425
 426         ret = wl1251_acx_station_id(wl);
 427         if (ret < 0)
 428                 goto out;
 429
 430         wl->state = WL1251_STATE_ON;
 431
 432         wl1251_info("firmware booted (%s)", wl->fw_ver);
 433
 434 out:
 435         if (ret < 0)
 436                 wl1251_power_off(wl);
 437
 438         mutex_unlock(&wl->mutex);
 439
 440         return ret;
 441 }
 442
 443 static void wl1251_op_stop(struct ieee80211_hw *hw)
 444 {
 445         struct wl1251 *wl = hw->priv;
 446
 447         wl1251_info("down");
 448
 449         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 450
 451         mutex_lock(&wl->mutex);
 452
 453         WARN_ON(wl->state != WL1251_STATE_ON);
 454
 455         if (wl->scanning) {
 456                 mutex_unlock(&wl->mutex);
 457                 ieee80211_scan_completed(wl->hw, true);
 458                 mutex_lock(&wl->mutex);
 459                 wl->scanning = false;
 460         }
 461
 462         wl->state = WL1251_STATE_OFF;
 463
 464         wl1251_disable_interrupts(wl);
 465
 466         mutex_unlock(&wl->mutex);
 467
 468         cancel_work_sync(&wl->irq_work);
 469         cancel_work_sync(&wl->tx_work);
 470         cancel_work_sync(&wl->filter_work);
 471
 472         mutex_lock(&wl->mutex);
 473
 474         /* let's notify MAC80211 about the remaining pending TX frames */
 475         wl1251_tx_flush(wl);
 476         wl1251_power_off(wl);
 477
 478         memset(wl->bssid, 0, ETH_ALEN);
 479         wl->listen_int = 1;
 480         wl->bss_type = MAX_BSS_TYPE;
 481
 482         wl->data_in_count = 0;
 483         wl->rx_counter = 0;
 484         wl->rx_handled = 0;
 485         wl->rx_current_buffer = 0;
 486         wl->rx_last_id = 0;
 487         wl->next_tx_complete = 0;
 488         wl->elp = false;
 489         wl->psm = 0;
 490         wl->tx_queue_stopped = false;
 491         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 492         wl->channel = WL1251_DEFAULT_CHANNEL;
 493
 494         wl1251_debugfs_reset(wl);
 495
 496         mutex_unlock(&wl->mutex);
 497 }
 498
 499 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 500                                    struct ieee80211_if_init_conf *conf)
 501 {
 502         struct wl1251 *wl = hw->priv;
 503         int ret = 0;
 504
 505         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 506                      conf->type, conf->mac_addr);
 507
 508         mutex_lock(&wl->mutex);
 509
 510         switch (conf->type) {
 511         case NL80211_IFTYPE_STATION:
 512                 wl->bss_type = BSS_TYPE_STA_BSS;
 513                 break;
 514         case NL80211_IFTYPE_ADHOC:
 515                 wl->bss_type = BSS_TYPE_IBSS;
 516                 break;
 517         default:
 518                 ret = -EOPNOTSUPP;
 519                 goto out;
 520         }
 521
 522         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
 523                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
 524                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 525                 ret = wl1251_acx_station_id(wl);
 526                 if (ret < 0)
 527                         goto out;
 528         }
 529
 530 out:
 531         mutex_unlock(&wl->mutex);
 532         return ret;
 533 }
 534
 535 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 536                                          struct ieee80211_if_init_conf *conf)
 537 {
 538         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 539 }
 540
 541 static int wl1251_build_null_data(struct wl1251 *wl)
 542 {
 543         struct wl12xx_null_data_template template;
 544
 545         if (!is_zero_ether_addr(wl->bssid)) {
 546                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
 547                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
 548         } else {
 549                 memset(template.header.da, 0xff, ETH_ALEN);
 550                 memset(template.header.bssid, 0xff, ETH_ALEN);
 551         }
 552
 553         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 554         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
 555                                                 IEEE80211_STYPE_NULLFUNC);
 556
 557         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
 558                                        sizeof(template));
 559
 560 }
 561
 562 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
 563 {
 564         struct wl12xx_ps_poll_template template;
 565
 566         memcpy(template.bssid, wl->bssid, ETH_ALEN);
 567         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
 568         template.aid = aid;
 569         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
 570
 571         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
 572                                        sizeof(template));
 573
 574 }
 575
 576 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 577 {
 578         struct wl1251 *wl = hw->priv;
 579         struct ieee80211_conf *conf = &hw->conf;
 580         int channel, ret = 0;
 581
 582         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 583
 584         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 585                      channel,
 586                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 587                      conf->power_level);
 588
 589         mutex_lock(&wl->mutex);
 590
 591         ret = wl1251_ps_elp_wakeup(wl);
 592         if (ret < 0)
 593                 goto out;
 594
 595         if (channel != wl->channel) {
 596                 wl->channel = channel;
 597
 598                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 599                                   wl->beacon_int, wl->dtim_period);
 600                 if (ret < 0)
 601                         goto out_sleep;
 602         }
 603
 604         ret = wl1251_build_null_data(wl);
 605         if (ret < 0)
 606                 goto out_sleep;
 607
 608         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 609                 wl1251_debug(DEBUG_PSM, "psm enabled");
 610
 611                 wl->psm_requested = true;
 612
 613                 /*
 614                  * We enter PSM only if we're already associated.
 615                  * If we're not, we'll enter it when joining an SSID,
 616                  * through the bss_info_changed() hook.
 617                  */
 618                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 619         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 620                    wl->psm_requested) {
 621                 wl1251_debug(DEBUG_PSM, "psm disabled");
 622
 623                 wl->psm_requested = false;
 624
 625                 if (wl->psm)
 626                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 627         }
 628
 629         if (conf->power_level != wl->power_level) {
 630                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 631                 if (ret < 0)
 632                         goto out;
 633
 634                 wl->power_level = conf->power_level;
 635         }
 636
 637 out_sleep:
 638         wl1251_ps_elp_sleep(wl);
 639
 640 out:
 641         mutex_unlock(&wl->mutex);
 642
 643         return ret;
 644 }
 645
 646 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 647                                   FIF_ALLMULTI | \
 648                                   FIF_FCSFAIL | \
 649                                   FIF_BCN_PRBRESP_PROMISC | \
 650                                   FIF_CONTROL | \
 651                                   FIF_OTHER_BSS)
 652
 653 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 654                                        unsigned int changed,
 655                                        unsigned int *total,
 656                                        int mc_count,
 657                                        struct dev_addr_list *mc_list)
 658 {
 659         struct wl1251 *wl = hw->priv;
 660
 661         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 662
 663         *total &= WL1251_SUPPORTED_FILTERS;
 664         changed &= WL1251_SUPPORTED_FILTERS;
 665
 666         if (changed == 0)
 667                 /* no filters which we support changed */
 668                 return;
 669
 670         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 671
 672         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 673         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 674
 675         if (*total & FIF_PROMISC_IN_BSS) {
 676                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 677                 wl->rx_config |= CFG_RX_ALL_GOOD;
 678         }
 679         if (*total & FIF_ALLMULTI)
 680                 /*
 681                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 682                  * all multicast frames
 683                  */
 684                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 685         if (*total & FIF_FCSFAIL)
 686                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 687         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 688                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 689                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 690         }
 691         if (*total & FIF_CONTROL)
 692                 wl->rx_filter |= CFG_RX_CTL_EN;
 693         if (*total & FIF_OTHER_BSS)
 694                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
 695
 696         /*
 697          * FIXME: workqueues need to be properly cancelled on stop(), for
 698          * now let's just disable changing the filter settings. They will
 699          * be updated any on config().
 700          */
 701         /* schedule_work(&wl->filter_work); */
 702 }
 703
 704 /* HW encryption */
 705 static int wl1251_set_key_type(struct wl1251 *wl,
 706                                struct wl1251_cmd_set_keys *key,
 707                                enum set_key_cmd cmd,
 708                                struct ieee80211_key_conf *mac80211_key,
 709                                const u8 *addr)
 710 {
 711         switch (mac80211_key->alg) {
 712         case ALG_WEP:
 713                 if (is_broadcast_ether_addr(addr))
 714                         key->key_type = KEY_WEP_DEFAULT;
 715                 else
 716                         key->key_type = KEY_WEP_ADDR;
 717
 718                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 719                 break;
 720         case ALG_TKIP:
 721                 if (is_broadcast_ether_addr(addr))
 722                         key->key_type = KEY_TKIP_MIC_GROUP;
 723                 else
 724                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 725
 726                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 727                 break;
 728         case ALG_CCMP:
 729                 if (is_broadcast_ether_addr(addr))
 730                         key->key_type = KEY_AES_GROUP;
 731                 else
 732                         key->key_type = KEY_AES_PAIRWISE;
 733                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 734                 break;
 735         default:
 736                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 737                 return -EOPNOTSUPP;
 738         }
 739
 740         return 0;
 741 }
 742
 743 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 744                              struct ieee80211_vif *vif,
 745                              struct ieee80211_sta *sta,
 746                              struct ieee80211_key_conf *key)
 747 {
 748         struct wl1251 *wl = hw->priv;
 749         struct wl1251_cmd_set_keys *wl_cmd;
 750         const u8 *addr;
 751         int ret;
 752
 753         static const u8 bcast_addr[ETH_ALEN] =
 754                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 755
 756         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 757
 758         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 759         if (!wl_cmd) {
 760                 ret = -ENOMEM;
 761                 goto out;
 762         }
 763
 764         addr = sta ? sta->addr : bcast_addr;
 765
 766         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 767         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 768         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 769                      key->alg, key->keyidx, key->keylen, key->flags);
 770         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 771
 772         if (is_zero_ether_addr(addr)) {
 773                 /* We dont support TX only encryption */
 774                 ret = -EOPNOTSUPP;
 775                 goto out;
 776         }
 777
 778         mutex_lock(&wl->mutex);
 779
 780         ret = wl1251_ps_elp_wakeup(wl);
 781         if (ret < 0)
 782                 goto out_unlock;
 783
 784         switch (cmd) {
 785         case SET_KEY:
 786                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 787                 break;
 788         case DISABLE_KEY:
 789                 wl_cmd->key_action = KEY_REMOVE;
 790                 break;
 791         default:
 792                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 793                 break;
 794         }
 795
 796         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 797         if (ret < 0) {
 798                 wl1251_error("Set KEY type failed");
 799                 goto out_sleep;
 800         }
 801
 802         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 803                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 804
 805         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 806             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 807                 /*
 808                  * We get the key in the following form:
 809                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 810                  * but the target is expecting:
 811                  * TKIP - RX MIC - TX MIC
 812                  */
 813                 memcpy(wl_cmd->key, key->key, 16);
 814                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 815                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 816
 817         } else {
 818                 memcpy(wl_cmd->key, key->key, key->keylen);
 819         }
 820         wl_cmd->key_size = key->keylen;
 821
 822         wl_cmd->id = key->keyidx;
 823         wl_cmd->ssid_profile = 0;
 824
 825         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 826
 827         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 828         if (ret < 0) {
 829                 wl1251_warning("could not set keys");
 830                 goto out_sleep;
 831         }
 832
 833 out_sleep:
 834         wl1251_ps_elp_sleep(wl);
 835
 836 out_unlock:
 837         mutex_unlock(&wl->mutex);
 838
 839 out:
 840         kfree(wl_cmd);
 841
 842         return ret;
 843 }
 844
 845 static int wl1251_build_basic_rates(char *rates)
 846 {
 847         u8 index = 0;
 848
 849         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
 850         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
 851         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
 852         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
 853
 854         return index;
 855 }
 856
 857 static int wl1251_build_extended_rates(char *rates)
 858 {
 859         u8 index = 0;
 860
 861         rates[index++] = IEEE80211_OFDM_RATE_6MB;
 862         rates[index++] = IEEE80211_OFDM_RATE_9MB;
 863         rates[index++] = IEEE80211_OFDM_RATE_12MB;
 864         rates[index++] = IEEE80211_OFDM_RATE_18MB;
 865         rates[index++] = IEEE80211_OFDM_RATE_24MB;
 866         rates[index++] = IEEE80211_OFDM_RATE_36MB;
 867         rates[index++] = IEEE80211_OFDM_RATE_48MB;
 868         rates[index++] = IEEE80211_OFDM_RATE_54MB;
 869
 870         return index;
 871 }
 872
 873
 874 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
 875 {
 876         struct wl12xx_probe_req_template template;
 877         struct wl12xx_ie_rates *rates;
 878         char *ptr;
 879         u16 size;
 880
 881         ptr = (char *)&template;
 882         size = sizeof(struct ieee80211_header);
 883
 884         memset(template.header.da, 0xff, ETH_ALEN);
 885         memset(template.header.bssid, 0xff, ETH_ALEN);
 886         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
 887         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 888
 889         /* IEs */
 890         /* SSID */
 891         template.ssid.header.id = WLAN_EID_SSID;
 892         template.ssid.header.len = ssid_len;
 893         if (ssid_len && ssid)
 894                 memcpy(template.ssid.ssid, ssid, ssid_len);
 895         size += sizeof(struct wl12xx_ie_header) + ssid_len;
 896         ptr += size;
 897
 898         /* Basic Rates */
 899         rates = (struct wl12xx_ie_rates *)ptr;
 900         rates->header.id = WLAN_EID_SUPP_RATES;
 901         rates->header.len = wl1251_build_basic_rates(rates->rates);
 902         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 903         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
 904
 905         /* Extended rates */
 906         rates = (struct wl12xx_ie_rates *)ptr;
 907         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
 908         rates->header.len = wl1251_build_extended_rates(rates->rates);
 909         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
 910
 911         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
 912
 913         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
 914                                       size);
 915 }
 916
 917 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
 918                           u8 active_scan, u8 high_prio, u8 num_channels,
 919                           u8 probe_requests)
 920 {
 921         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
 922         struct cmd_scan *params = NULL;
 923         int i, ret;
 924         u16 scan_options = 0;
 925
 926         if (wl->scanning)
 927                 return -EINVAL;
 928
 929         params = kzalloc(sizeof(*params), GFP_KERNEL);
 930         if (!params)
 931                 return -ENOMEM;
 932
 933         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 934         params->params.rx_filter_options =
 935                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
 936
 937         /* High priority scan */
 938         if (!active_scan)
 939                 scan_options |= SCAN_PASSIVE;
 940         if (high_prio)
 941                 scan_options |= SCAN_PRIORITY_HIGH;
 942         params->params.scan_options = scan_options;
 943
 944         params->params.num_channels = num_channels;
 945         params->params.num_probe_requests = probe_requests;
 946         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 947         params->params.tid_trigger = 0;
 948
 949         for (i = 0; i < num_channels; i++) {
 950                 params->channels[i].min_duration = cpu_to_le32(30000);
 951                 params->channels[i].max_duration = cpu_to_le32(60000);
 952                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
 953                 memset(&params->channels[i].bssid_msb, 0xff, 2);
 954                 params->channels[i].early_termination = 0;
 955                 params->channels[i].tx_power_att = 0;
 956                 params->channels[i].channel = i + 1;
 957                 memset(params->channels[i].pad, 0, 3);
 958         }
 959
 960         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
 961                 memset(&params->channels[i], 0,
 962                        sizeof(struct basic_scan_channel_parameters));
 963
 964         if (len && ssid) {
 965                 params->params.ssid_len = len;
 966                 memcpy(params->params.ssid, ssid, len);
 967         } else {
 968                 params->params.ssid_len = 0;
 969                 memset(params->params.ssid, 0, 32);
 970         }
 971
 972         ret = wl1251_build_probe_req(wl, ssid, len);
 973         if (ret < 0) {
 974                 wl1251_error("PROBE request template failed");
 975                 goto out;
 976         }
 977
 978         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
 979         if (!trigger)
 980                 goto out;
 981
 982         trigger->timeout = 0;
 983
 984         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
 985                               sizeof(*trigger));
 986         if (ret < 0) {
 987                 wl1251_error("trigger scan to failed for hw scan");
 988                 goto out;
 989         }
 990
 991         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
 992
 993         wl->scanning = true;
 994
 995         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
 996         if (ret < 0)
 997                 wl1251_error("SCAN failed");
 998
 999         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
1000
1001         if (params->header.status != CMD_STATUS_SUCCESS) {
1002                 wl1251_error("TEST command answer error: %d",
1003                              params->header.status);
1004                 wl->scanning = false;
1005                 ret = -EIO;
1006                 goto out;
1007         }
1008
1009 out:
1010         kfree(params);
1011         return ret;
1012
1013 }
1014
1015 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1016                              struct cfg80211_scan_request *req)
1017 {
1018         struct wl1251 *wl = hw->priv;
1019         int ret;
1020         u8 *ssid = NULL;
1021         size_t ssid_len = 0;
1022
1023         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1024
1025         if (req->n_ssids) {
1026                 ssid = req->ssids[0].ssid;
1027                 ssid_len = req->ssids[0].ssid_len;
1028         }
1029
1030         mutex_lock(&wl->mutex);
1031
1032         ret = wl1251_ps_elp_wakeup(wl);
1033         if (ret < 0)
1034                 goto out;
1035
1036         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1037
1038         wl1251_ps_elp_sleep(wl);
1039
1040 out:
1041         mutex_unlock(&wl->mutex);
1042
1043         return ret;
1044 }
1045
1046 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1047 {
1048         struct wl1251 *wl = hw->priv;
1049         int ret;
1050
1051         mutex_lock(&wl->mutex);
1052
1053         ret = wl1251_ps_elp_wakeup(wl);
1054         if (ret < 0)
1055                 goto out;
1056
1057         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1058         if (ret < 0)
1059                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1060
1061         wl1251_ps_elp_sleep(wl);
1062
1063 out:
1064         mutex_unlock(&wl->mutex);
1065
1066         return ret;
1067 }
1068
1069 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1070                                        struct ieee80211_vif *vif,
1071                                        struct ieee80211_bss_conf *bss_conf,
1072                                        u32 changed)
1073 {
1074         enum wl1251_cmd_ps_mode mode;
1075         struct wl1251 *wl = hw->priv;
1076         struct sk_buff *beacon;
1077         int ret;
1078
1079         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1080
1081         mutex_lock(&wl->mutex);
1082
1083         ret = wl1251_ps_elp_wakeup(wl);
1084         if (ret < 0)
1085                 goto out;
1086
1087         if (changed & BSS_CHANGED_ASSOC) {
1088                 if (bss_conf->assoc) {
1089                         wl->beacon_int = bss_conf->beacon_int;
1090                         wl->dtim_period = bss_conf->dtim_period;
1091
1092                         /* FIXME: call join */
1093
1094                         wl->aid = bss_conf->aid;
1095
1096                         ret = wl1251_build_ps_poll(wl, wl->aid);
1097                         if (ret < 0)
1098                                 goto out_sleep;
1099
1100                         ret = wl1251_acx_aid(wl, wl->aid);
1101                         if (ret < 0)
1102                                 goto out_sleep;
1103
1104                         /* If we want to go in PSM but we're not there yet */
1105                         if (wl->psm_requested && !wl->psm) {
1106                                 mode = STATION_POWER_SAVE_MODE;
1107                                 ret = wl1251_ps_set_mode(wl, mode);
1108                                 if (ret < 0)
1109                                         goto out_sleep;
1110                         }
1111                 } else {
1112                         /* use defaults when not associated */
1113                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1114                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1115                 }
1116         }
1117         if (changed & BSS_CHANGED_ERP_SLOT) {
1118                 if (bss_conf->use_short_slot)
1119                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1120                 else
1121                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1122                 if (ret < 0) {
1123                         wl1251_warning("Set slot time failed %d", ret);
1124                         goto out_sleep;
1125                 }
1126         }
1127
1128         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1129                 if (bss_conf->use_short_preamble)
1130                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1131                 else
1132                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1133         }
1134
1135         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1136                 if (bss_conf->use_cts_prot)
1137                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1138                 else
1139                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1140                 if (ret < 0) {
1141                         wl1251_warning("Set ctsprotect failed %d", ret);
1142                         goto out;
1143                 }
1144         }
1145
1146         if (changed & BSS_CHANGED_BSSID) {
1147                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1148
1149                 ret = wl1251_build_null_data(wl);
1150                 if (ret < 0)
1151                         goto out;
1152
1153                 if (wl->bss_type != BSS_TYPE_IBSS) {
1154                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1155                                           wl->beacon_int, wl->dtim_period);
1156                         if (ret < 0)
1157                                 goto out_sleep;
1158                         wl1251_warning("Set ctsprotect failed %d", ret);
1159                         goto out_sleep;
1160                 }
1161         }
1162
1163         if (changed & BSS_CHANGED_BEACON) {
1164                 beacon = ieee80211_beacon_get(hw, vif);
1165                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1166                                               beacon->len);
1167
1168                 if (ret < 0) {
1169                         dev_kfree_skb(beacon);
1170                         goto out;
1171                 }
1172
1173                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1174                                               beacon->len);
1175
1176                 dev_kfree_skb(beacon);
1177
1178                 if (ret < 0)
1179                         goto out;
1180
1181                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1182                                   wl->channel, wl->dtim_period);
1183
1184                 if (ret < 0)
1185                         goto out;
1186         }
1187
1188 out_sleep:
1189         wl1251_ps_elp_sleep(wl);
1190
1191 out:
1192         mutex_unlock(&wl->mutex);
1193 }
1194
1195
1196 /* can't be const, mac80211 writes to this */
1197 static struct ieee80211_rate wl1251_rates[] = {
1198         { .bitrate = 10,
1199           .hw_value = 0x1,
1200           .hw_value_short = 0x1, },
1201         { .bitrate = 20,
1202           .hw_value = 0x2,
1203           .hw_value_short = 0x2,
1204           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1205         { .bitrate = 55,
1206           .hw_value = 0x4,
1207           .hw_value_short = 0x4,
1208           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1209         { .bitrate = 110,
1210           .hw_value = 0x20,
1211           .hw_value_short = 0x20,
1212           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1213         { .bitrate = 60,
1214           .hw_value = 0x8,
1215           .hw_value_short = 0x8, },
1216         { .bitrate = 90,
1217           .hw_value = 0x10,
1218           .hw_value_short = 0x10, },
1219         { .bitrate = 120,
1220           .hw_value = 0x40,
1221           .hw_value_short = 0x40, },
1222         { .bitrate = 180,
1223           .hw_value = 0x80,
1224           .hw_value_short = 0x80, },
1225         { .bitrate = 240,
1226           .hw_value = 0x200,
1227           .hw_value_short = 0x200, },
1228         { .bitrate = 360,
1229          .hw_value = 0x400,
1230          .hw_value_short = 0x400, },
1231         { .bitrate = 480,
1232           .hw_value = 0x800,
1233           .hw_value_short = 0x800, },
1234         { .bitrate = 540,
1235           .hw_value = 0x1000,
1236           .hw_value_short = 0x1000, },
1237 };
1238
1239 /* can't be const, mac80211 writes to this */
1240 static struct ieee80211_channel wl1251_channels[] = {
1241         { .hw_value = 1, .center_freq = 2412},
1242         { .hw_value = 2, .center_freq = 2417},
1243         { .hw_value = 3, .center_freq = 2422},
1244         { .hw_value = 4, .center_freq = 2427},
1245         { .hw_value = 5, .center_freq = 2432},
1246         { .hw_value = 6, .center_freq = 2437},
1247         { .hw_value = 7, .center_freq = 2442},
1248         { .hw_value = 8, .center_freq = 2447},
1249         { .hw_value = 9, .center_freq = 2452},
1250         { .hw_value = 10, .center_freq = 2457},
1251         { .hw_value = 11, .center_freq = 2462},
1252         { .hw_value = 12, .center_freq = 2467},
1253         { .hw_value = 13, .center_freq = 2472},
1254 };
1255
1256 /* can't be const, mac80211 writes to this */
1257 static struct ieee80211_supported_band wl1251_band_2ghz = {
1258         .channels = wl1251_channels,
1259         .n_channels = ARRAY_SIZE(wl1251_channels),
1260         .bitrates = wl1251_rates,
1261         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1262 };
1263
1264 static const struct ieee80211_ops wl1251_ops = {
1265         .start = wl1251_op_start,
1266         .stop = wl1251_op_stop,
1267         .add_interface = wl1251_op_add_interface,
1268         .remove_interface = wl1251_op_remove_interface,
1269         .config = wl1251_op_config,
1270         .configure_filter = wl1251_op_configure_filter,
1271         .tx = wl1251_op_tx,
1272         .set_key = wl1251_op_set_key,
1273         .hw_scan = wl1251_op_hw_scan,
1274         .bss_info_changed = wl1251_op_bss_info_changed,
1275         .set_rts_threshold = wl1251_op_set_rts_threshold,
1276 };
1277
1278 static int wl1251_register_hw(struct wl1251 *wl)
1279 {
1280         int ret;
1281
1282         if (wl->mac80211_registered)
1283                 return 0;
1284
1285         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1286
1287         ret = ieee80211_register_hw(wl->hw);
1288         if (ret < 0) {
1289                 wl1251_error("unable to register mac80211 hw: %d", ret);
1290                 return ret;
1291         }
1292
1293         wl->mac80211_registered = true;
1294
1295         wl1251_notice("loaded");
1296
1297         return 0;
1298 }
1299
1300 int wl1251_init_ieee80211(struct wl1251 *wl)
1301 {
1302         int ret;
1303
1304         /* The tx descriptor buffer and the TKIP space */
1305         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1306                 + WL1251_TKIP_IV_SPACE;
1307
1308         /* unit us */
1309         /* FIXME: find a proper value */
1310         wl->hw->channel_change_time = 10000;
1311
1312         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1313                 IEEE80211_HW_NOISE_DBM;
1314
1315         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1316         wl->hw->wiphy->max_scan_ssids = 1;
1317         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1318
1319         ret = wl1251_register_hw(wl);
1320         if (ret)
1321                 goto out;
1322
1323         wl1251_debugfs_init(wl);
1324         wl1251_notice("initialized");
1325
1326         ret = 0;
1327
1328 out:
1329         return ret;
1330 }
1331 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1332
1333 struct ieee80211_hw *wl1251_alloc_hw(void)
1334 {
1335         struct ieee80211_hw *hw;
1336         struct wl1251 *wl;
1337         int i;
1338         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1339
1340         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1341         if (!hw) {
1342                 wl1251_error("could not alloc ieee80211_hw");
1343                 return ERR_PTR(-ENOMEM);
1344         }
1345
1346         wl = hw->priv;
1347         memset(wl, 0, sizeof(*wl));
1348
1349         wl->hw = hw;
1350
1351         wl->data_in_count = 0;
1352
1353         skb_queue_head_init(&wl->tx_queue);
1354
1355         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1356         wl->channel = WL1251_DEFAULT_CHANNEL;
1357         wl->scanning = false;
1358         wl->default_key = 0;
1359         wl->listen_int = 1;
1360         wl->rx_counter = 0;
1361         wl->rx_handled = 0;
1362         wl->rx_current_buffer = 0;
1363         wl->rx_last_id = 0;
1364         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1365         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1366         wl->elp = false;
1367         wl->psm = 0;
1368         wl->psm_requested = false;
1369         wl->tx_queue_stopped = false;
1370         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1371         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1372         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1373
1374         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1375                 wl->tx_frames[i] = NULL;
1376
1377         wl->next_tx_complete = 0;
1378
1379         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1380         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1381
1382         /*
1383          * In case our MAC address is not correctly set,
1384          * we use a random but Nokia MAC.
1385          */
1386         memcpy(wl->mac_addr, nokia_oui, 3);
1387         get_random_bytes(wl->mac_addr + 3, 3);
1388
1389         wl->state = WL1251_STATE_OFF;
1390         mutex_init(&wl->mutex);
1391
1392         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1393         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1394
1395         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1396         if (!wl->rx_descriptor) {
1397                 wl1251_error("could not allocate memory for rx descriptor");
1398                 ieee80211_free_hw(hw);
1399                 return ERR_PTR(-ENOMEM);
1400         }
1401
1402         return hw;
1403 }
1404 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1405
1406 int wl1251_free_hw(struct wl1251 *wl)
1407 {
1408         ieee80211_unregister_hw(wl->hw);
1409
1410         wl1251_debugfs_exit(wl);
1411
1412         kfree(wl->target_mem_map);
1413         kfree(wl->data_path);
1414         kfree(wl->fw);
1415         wl->fw = NULL;
1416         kfree(wl->nvs);
1417         wl->nvs = NULL;
1418
1419         kfree(wl->rx_descriptor);
1420         wl->rx_descriptor = NULL;
1421
1422         ieee80211_free_hw(wl->hw);
1423
1424         return 0;
1425 }
1426 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1427
1428 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1429 MODULE_LICENSE("GPL");
1430 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
1431 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");