drivers/net/wireless/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31
  32 #include "wl1251.h"
  33 #include "wl12xx_80211.h"
  34 #include "reg.h"
  35 #include "io.h"
  36 #include "cmd.h"
  37 #include "event.h"
  38 #include "tx.h"
  39 #include "rx.h"
  40 #include "ps.h"
  41 #include "init.h"
  42 #include "debugfs.h"
  43 #include "boot.h"
  44
  45 void wl1251_enable_interrupts(struct wl1251 *wl)
  46 {
  47         wl->if_ops->enable_irq(wl);
  48 }
  49
  50 void wl1251_disable_interrupts(struct wl1251 *wl)
  51 {
  52         wl->if_ops->disable_irq(wl);
  53 }
  54
  55 static int wl1251_power_off(struct wl1251 *wl)
  56 {
  57         return wl->if_ops->power(wl, false);
  58 }
  59
  60 static int wl1251_power_on(struct wl1251 *wl)
  61 {
  62         return wl->if_ops->power(wl, true);
  63 }
  64
  65 static int wl1251_fetch_firmware(struct wl1251 *wl)
  66 {
  67         const struct firmware *fw;
  68         struct device *dev = wiphy_dev(wl->hw->wiphy);
  69         int ret;
  70
  71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  72
  73         if (ret < 0) {
  74                 wl1251_error("could not get firmware: %d", ret);
  75                 return ret;
  76         }
  77
  78         if (fw->size % 4) {
  79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  80                              fw->size);
  81                 ret = -EILSEQ;
  82                 goto out;
  83         }
  84
  85         wl->fw_len = fw->size;
  86         wl->fw = vmalloc(wl->fw_len);
  87
  88         if (!wl->fw) {
  89                 wl1251_error("could not allocate memory for the firmware");
  90                 ret = -ENOMEM;
  91                 goto out;
  92         }
  93
  94         memcpy(wl->fw, fw->data, wl->fw_len);
  95
  96         ret = 0;
  97
  98 out:
  99         release_firmware(fw);
 100
 101         return ret;
 102 }
 103
 104 static int wl1251_fetch_nvs(struct wl1251 *wl)
 105 {
 106         const struct firmware *fw;
 107         struct device *dev = wiphy_dev(wl->hw->wiphy);
 108         int ret;
 109
 110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 111
 112         if (ret < 0) {
 113                 wl1251_error("could not get nvs file: %d", ret);
 114                 return ret;
 115         }
 116
 117         if (fw->size % 4) {
 118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 119                              fw->size);
 120                 ret = -EILSEQ;
 121                 goto out;
 122         }
 123
 124         wl->nvs_len = fw->size;
 125         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 126
 127         if (!wl->nvs) {
 128                 wl1251_error("could not allocate memory for the nvs file");
 129                 ret = -ENOMEM;
 130                 goto out;
 131         }
 132
 133         ret = 0;
 134
 135 out:
 136         release_firmware(fw);
 137
 138         return ret;
 139 }
 140
 141 static void wl1251_fw_wakeup(struct wl1251 *wl)
 142 {
 143         u32 elp_reg;
 144
 145         elp_reg = ELPCTRL_WAKE_UP;
 146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 148
 149         if (!(elp_reg & ELPCTRL_WLAN_READY))
 150                 wl1251_warning("WLAN not ready");
 151 }
 152
 153 static int wl1251_chip_wakeup(struct wl1251 *wl)
 154 {
 155         int ret;
 156
 157         ret = wl1251_power_on(wl);
 158         if (ret < 0)
 159                 return ret;
 160
 161         msleep(WL1251_POWER_ON_SLEEP);
 162         wl->if_ops->reset(wl);
 163
 164         /* We don't need a real memory partition here, because we only want
 165          * to use the registers at this point. */
 166         wl1251_set_partition(wl,
 167                              0x00000000,
 168                              0x00000000,
 169                              REGISTERS_BASE,
 170                              REGISTERS_DOWN_SIZE);
 171
 172         /* ELP module wake up */
 173         wl1251_fw_wakeup(wl);
 174
 175         /* whal_FwCtrl_BootSm() */
 176
 177         /* 0. read chip id from CHIP_ID */
 178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 179
 180         /* 1. check if chip id is valid */
 181
 182         switch (wl->chip_id) {
 183         case CHIP_ID_1251_PG12:
 184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 185                              wl->chip_id);
 186                 break;
 187         case CHIP_ID_1251_PG11:
 188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 189                              wl->chip_id);
 190                 break;
 191         case CHIP_ID_1251_PG10:
 192         default:
 193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 194                 ret = -ENODEV;
 195                 goto out;
 196         }
 197
 198         if (wl->fw == NULL) {
 199                 ret = wl1251_fetch_firmware(wl);
 200                 if (ret < 0)
 201                         goto out;
 202         }
 203
 204         if (wl->nvs == NULL && !wl->use_eeprom) {
 205                 /* No NVS from netlink, try to get it from the filesystem */
 206                 ret = wl1251_fetch_nvs(wl);
 207                 if (ret < 0)
 208                         goto out;
 209         }
 210
 211 out:
 212         return ret;
 213 }
 214
 215 #define WL1251_IRQ_LOOP_COUNT 100
 216 irqreturn_t wl1251_irq(int irq, void *cookie)
 217 {
 218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 219         struct wl1251 *wl = cookie;
 220         int ret;
 221
 222         mutex_lock(&wl->mutex);
 223
 224         wl1251_debug(DEBUG_IRQ, "IRQ work");
 225
 226         if (wl->state == WL1251_STATE_OFF)
 227                 goto out;
 228
 229         ret = wl1251_ps_elp_wakeup(wl);
 230         if (ret < 0)
 231                 goto out;
 232
 233         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 234
 235         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 236         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 237
 238         do {
 239                 if (wl->data_path) {
 240                         wl->rx_counter = wl1251_mem_read32(
 241                                 wl, wl->data_path->rx_control_addr);
 242
 243                         /* We handle a frmware bug here */
 244                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 245                         case 0:
 246                                 wl1251_debug(DEBUG_IRQ,
 247                                              "RX: FW and host in sync");
 248                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 249                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 250                                 break;
 251                         case 1:
 252                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 253                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 254                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 255                                 break;
 256                         case 2:
 257                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 258                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 259                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 260                                 break;
 261                         default:
 262                                 wl1251_warning(
 263                                         "RX: FW and host out of sync: %d",
 264                                         wl->rx_counter - wl->rx_handled);
 265                                 break;
 266                         }
 267
 268                         wl->rx_handled = wl->rx_counter;
 269
 270                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 271                                      wl->rx_counter);
 272                 }
 273
 274                 intr &= wl->intr_mask;
 275
 276                 if (intr == 0) {
 277                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 278                         goto out_sleep;
 279                 }
 280
 281                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 282                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 283                         wl1251_rx(wl);
 284                 }
 285
 286                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 287                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 288                         wl1251_rx(wl);
 289                 }
 290
 291                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 292                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 293                         wl1251_tx_complete(wl);
 294                 }
 295
 296                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 297                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 298                         wl1251_event_handle(wl, 0);
 299                 }
 300
 301                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 302                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 303                         wl1251_event_handle(wl, 1);
 304                 }
 305
 306                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 307                         wl1251_debug(DEBUG_IRQ,
 308                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 309
 310                 while (skb_queue_len(&wl->tx_queue) > 0
 311                        && wl1251_tx_path_status(wl) == 0) {
 312
 313                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 314                         if (skb == NULL)
 315                                 goto out_sleep;
 316
 317                         ret = wl1251_tx_frame(wl, skb);
 318                         if (ret == -EBUSY) {
 319                                 skb_queue_head(&wl->tx_queue, skb);
 320                                 break;
 321                         } else if (ret < 0) {
 322                                 dev_kfree_skb(skb);
 323                         }
 324                 }
 325
 326                 if (--ctr == 0)
 327                         break;
 328
 329                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 330         } while (intr);
 331
 332 out_sleep:
 333         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 334         wl1251_ps_elp_sleep(wl);
 335
 336 out:
 337         mutex_unlock(&wl->mutex);
 338         return IRQ_HANDLED;
 339 }
 340 EXPORT_SYMBOL_GPL(wl1251_irq);
 341
 342 static void wl1251_irq_work(struct work_struct *work)
 343 {
 344         struct wl1251 *wl =
 345                 container_of(work, struct wl1251, irq_work);
 346
 347         wl1251_irq(0, wl);
 348 }
 349
 350 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 351                        u16 beacon_interval, u8 dtim_period)
 352 {
 353         int ret;
 354
 355         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 356                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 357                                      wl->tx_mgmt_frm_rate,
 358                                      wl->tx_mgmt_frm_mod);
 359         if (ret < 0)
 360                 goto out;
 361
 362         /*
 363          * Join command applies filters, and if we are not associated,
 364          * BSSID filter must be disabled for association to work.
 365          */
 366         if (is_zero_ether_addr(wl->bssid))
 367                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 368
 369         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 370                               dtim_period);
 371         if (ret < 0)
 372                 goto out;
 373
 374         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 375         if (ret < 0)
 376                 wl1251_warning("join timeout");
 377
 378 out:
 379         return ret;
 380 }
 381
 382 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 383 {
 384         struct wl1251 *wl = hw->priv;
 385         unsigned long flags;
 386
 387         skb_queue_tail(&wl->tx_queue, skb);
 388
 389         /*
 390          * The chip specific setup must run before the first TX packet -
 391          * before that, the tx_work will not be initialized!
 392          */
 393
 394         ieee80211_queue_work(wl->hw, &wl->tx_work);
 395
 396         /*
 397          * The workqueue is slow to process the tx_queue and we need stop
 398          * the queue here, otherwise the queue will get too long.
 399          */
 400         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 401                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 402
 403                 spin_lock_irqsave(&wl->wl_lock, flags);
 404                 ieee80211_stop_queues(wl->hw);
 405                 wl->tx_queue_stopped = true;
 406                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 407         }
 408 }
 409
 410 static int wl1251_op_start(struct ieee80211_hw *hw)
 411 {
 412         struct wl1251 *wl = hw->priv;
 413         struct wiphy *wiphy = hw->wiphy;
 414         int ret = 0;
 415
 416         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 417
 418         mutex_lock(&wl->mutex);
 419
 420         if (wl->state != WL1251_STATE_OFF) {
 421                 wl1251_error("cannot start because not in off state: %d",
 422                              wl->state);
 423                 ret = -EBUSY;
 424                 goto out;
 425         }
 426
 427         ret = wl1251_chip_wakeup(wl);
 428         if (ret < 0)
 429                 goto out;
 430
 431         ret = wl1251_boot(wl);
 432         if (ret < 0)
 433                 goto out;
 434
 435         ret = wl1251_hw_init(wl);
 436         if (ret < 0)
 437                 goto out;
 438
 439         ret = wl1251_acx_station_id(wl);
 440         if (ret < 0)
 441                 goto out;
 442
 443         wl->state = WL1251_STATE_ON;
 444
 445         wl1251_info("firmware booted (%s)", wl->fw_ver);
 446
 447         /* update hw/fw version info in wiphy struct */
 448         wiphy->hw_version = wl->chip_id;
 449         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 450
 451 out:
 452         if (ret < 0)
 453                 wl1251_power_off(wl);
 454
 455         mutex_unlock(&wl->mutex);
 456
 457         return ret;
 458 }
 459
 460 static void wl1251_op_stop(struct ieee80211_hw *hw)
 461 {
 462         struct wl1251 *wl = hw->priv;
 463
 464         wl1251_info("down");
 465
 466         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 467
 468         mutex_lock(&wl->mutex);
 469
 470         WARN_ON(wl->state != WL1251_STATE_ON);
 471
 472         if (wl->scanning) {
 473                 ieee80211_scan_completed(wl->hw, true);
 474                 wl->scanning = false;
 475         }
 476
 477         wl->state = WL1251_STATE_OFF;
 478
 479         wl1251_disable_interrupts(wl);
 480
 481         mutex_unlock(&wl->mutex);
 482
 483         cancel_work_sync(&wl->irq_work);
 484         cancel_work_sync(&wl->tx_work);
 485         cancel_delayed_work_sync(&wl->ps_work);
 486         cancel_delayed_work_sync(&wl->elp_work);
 487
 488         mutex_lock(&wl->mutex);
 489
 490         /* let's notify MAC80211 about the remaining pending TX frames */
 491         wl1251_tx_flush(wl);
 492         wl1251_power_off(wl);
 493
 494         memset(wl->bssid, 0, ETH_ALEN);
 495         wl->listen_int = 1;
 496         wl->bss_type = MAX_BSS_TYPE;
 497
 498         wl->data_in_count = 0;
 499         wl->rx_counter = 0;
 500         wl->rx_handled = 0;
 501         wl->rx_current_buffer = 0;
 502         wl->rx_last_id = 0;
 503         wl->next_tx_complete = 0;
 504         wl->elp = false;
 505         wl->station_mode = STATION_ACTIVE_MODE;
 506         wl->tx_queue_stopped = false;
 507         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 508         wl->rssi_thold = 0;
 509         wl->channel = WL1251_DEFAULT_CHANNEL;
 510
 511         wl1251_debugfs_reset(wl);
 512
 513         mutex_unlock(&wl->mutex);
 514 }
 515
 516 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 517                                    struct ieee80211_vif *vif)
 518 {
 519         struct wl1251 *wl = hw->priv;
 520         int ret = 0;
 521
 522         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 523                      vif->type, vif->addr);
 524
 525         mutex_lock(&wl->mutex);
 526         if (wl->vif) {
 527                 ret = -EBUSY;
 528                 goto out;
 529         }
 530
 531         wl->vif = vif;
 532
 533         switch (vif->type) {
 534         case NL80211_IFTYPE_STATION:
 535                 wl->bss_type = BSS_TYPE_STA_BSS;
 536                 break;
 537         case NL80211_IFTYPE_ADHOC:
 538                 wl->bss_type = BSS_TYPE_IBSS;
 539                 break;
 540         default:
 541                 ret = -EOPNOTSUPP;
 542                 goto out;
 543         }
 544
 545         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 546                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 547                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 548                 ret = wl1251_acx_station_id(wl);
 549                 if (ret < 0)
 550                         goto out;
 551         }
 552
 553 out:
 554         mutex_unlock(&wl->mutex);
 555         return ret;
 556 }
 557
 558 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 559                                          struct ieee80211_vif *vif)
 560 {
 561         struct wl1251 *wl = hw->priv;
 562
 563         mutex_lock(&wl->mutex);
 564         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 565         wl->vif = NULL;
 566         mutex_unlock(&wl->mutex);
 567 }
 568
 569 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 570 {
 571         struct ieee80211_qos_hdr template;
 572
 573         memset(&template, 0, sizeof(template));
 574
 575         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 576         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 577         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 578
 579         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 580                                              IEEE80211_STYPE_QOS_NULLFUNC |
 581                                              IEEE80211_FCTL_TODS);
 582
 583         /* FIXME: not sure what priority to use here */
 584         template.qos_ctrl = cpu_to_le16(0);
 585
 586         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 587                                        sizeof(template));
 588 }
 589
 590 static void wl1251_ps_work(struct work_struct *work)
 591 {
 592         struct delayed_work *dwork;
 593         struct wl1251 *wl;
 594         unsigned long diff, wait;
 595         bool need_ps;
 596         bool have_ps;
 597         int ret;
 598         int i;
 599
 600         dwork = container_of(work, struct delayed_work, work);
 601         wl = container_of(dwork, struct wl1251, ps_work);
 602
 603         mutex_lock(&wl->mutex);
 604
 605         /* don't change PS modes while still transitioning, to avoid possbile
 606          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 607         if (wl->ps_transitioning) {
 608                 diff = jiffies - wl->ps_change_jiffies;
 609                 if (diff > msecs_to_jiffies(500)) {
 610                         wl1251_error("PS change taking too long: %lu", diff);
 611                         wl->ps_transitioning = false;
 612                 } else {
 613                         //wl1251_error("PS still transitioning");
 614                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 615                                 msecs_to_jiffies(50));
 616                         goto out;
 617                 }
 618         }
 619
 620         need_ps = wl->psm_requested && !wl->bss_lost;
 621         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 622
 623         if (need_ps == have_ps) {
 624                 //wl1251_info("ps: already in mode %d", have_ps);
 625                 goto out;
 626         }
 627
 628         /* don't enter PS if there was recent activity */
 629         if (need_ps) {
 630                 wait = 0;
 631
 632                 diff = jiffies - wl->last_io_jiffies;
 633                 if (diff < msecs_to_jiffies(150)) {
 634                         //wl1251_info("ps: postponed psm, j %ld", diff);
 635                         wait = msecs_to_jiffies(150) - diff + 1;
 636                 }
 637
 638                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 639                         if (wl->tx_frames[i] != NULL) {
 640                                 //wl1251_error("  frm %d busy", i);
 641                                 if (wait < msecs_to_jiffies(50))
 642                                         wait = msecs_to_jiffies(50);
 643                                 break;
 644                         }
 645                 }
 646
 647                 if (wait > 0) {
 648                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 649                         goto out;
 650                 }
 651         }
 652
 653         ret = wl1251_ps_elp_wakeup(wl);
 654         if (ret < 0)
 655                 goto out;
 656
 657         if (need_ps) {
 658                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 659                                             wl->dtim_period);
 660         }
 661         ret = wl1251_ps_set_mode(wl,
 662                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 663         if (ret < 0)
 664                 goto out_sleep;
 665
 666         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 667         //      jiffies - wl->last_io_jiffies);
 668
 669 out_sleep:
 670         wl1251_ps_elp_sleep(wl);
 671
 672 out:
 673         mutex_unlock(&wl->mutex);
 674 }
 675
 676 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 677 {
 678         struct wl1251 *wl = hw->priv;
 679         struct ieee80211_conf *conf = &hw->conf;
 680         int channel, ret = 0;
 681
 682         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 683
 684         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 685                      channel,
 686                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 687                      conf->power_level);
 688
 689         mutex_lock(&wl->mutex);
 690
 691         ret = wl1251_ps_elp_wakeup(wl);
 692         if (ret < 0)
 693                 goto out;
 694
 695         if (channel != wl->channel) {
 696                 wl->channel = channel;
 697
 698                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
 699                                   wl->beacon_int, wl->dtim_period);
 700                 if (ret < 0)
 701                         goto out_sleep;
 702         }
 703
 704         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 705                 wl1251_debug(DEBUG_PSM, "psm enabled");
 706
 707                 wl->psm_requested = true;
 708
 709                 wl->dtim_period = conf->ps_dtim_period;
 710
 711                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 712         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 713                    wl->psm_requested) {
 714                 wl1251_debug(DEBUG_PSM, "psm disabled");
 715
 716                 wl->psm_requested = false;
 717
 718                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 719         }
 720
 721         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 722                 if (conf->flags & IEEE80211_CONF_IDLE) {
 723                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 724                         if (ret < 0)
 725                                 goto out_sleep;
 726                 } else {
 727                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 728                         if (ret < 0)
 729                                 goto out_sleep;
 730
 731                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 732                         if (ret < 0)
 733                                 wl1251_error("error waiting for wakeup");
 734
 735                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 736                                           wl->beacon_int, wl->dtim_period);
 737                         if (ret < 0)
 738                                 goto out_sleep;
 739                 }
 740         }
 741
 742         if (conf->power_level != wl->power_level) {
 743                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 744                 if (ret < 0)
 745                         goto out_sleep;
 746
 747                 wl->power_level = conf->power_level;
 748         }
 749
 750 out_sleep:
 751         wl1251_ps_elp_sleep(wl);
 752
 753 out:
 754         mutex_unlock(&wl->mutex);
 755
 756         return ret;
 757 }
 758
 759 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 760                                   FIF_ALLMULTI | \
 761                                   FIF_FCSFAIL | \
 762                                   FIF_BCN_PRBRESP_PROMISC | \
 763                                   FIF_CONTROL | \
 764                                   FIF_OTHER_BSS | \
 765                                   FIF_PROBE_REQ)
 766
 767 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 768                                        unsigned int changed,
 769                                        unsigned int *total,u64 multicast)
 770 {
 771         struct wl1251 *wl = hw->priv;
 772         int ret;
 773
 774         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 775
 776         *total &= WL1251_SUPPORTED_FILTERS;
 777         changed &= WL1251_SUPPORTED_FILTERS;
 778
 779         if (changed == 0)
 780                 /* no filters which we support changed */
 781                 return;
 782
 783         mutex_lock(&wl->mutex);
 784
 785         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 786         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 787
 788         if (*total & FIF_PROMISC_IN_BSS) {
 789                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 790                 wl->rx_config |= CFG_RX_ALL_GOOD;
 791         }
 792         if (*total & FIF_ALLMULTI)
 793                 /*
 794                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 795                  * all multicast frames
 796                  */
 797                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 798         if (*total & FIF_FCSFAIL)
 799                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 800         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 801                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 802                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 803         }
 804         if (*total & FIF_CONTROL)
 805                 wl->rx_filter |= CFG_RX_CTL_EN;
 806         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 807                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 808         if (*total & FIF_PROBE_REQ)
 809                 wl->rx_filter |= CFG_RX_PREQ_EN;
 810
 811         if (wl->state == WL1251_STATE_OFF)
 812                 goto out;
 813
 814         ret = wl1251_ps_elp_wakeup(wl);
 815         if (ret < 0)
 816                 goto out;
 817
 818         /* send filters to firmware */
 819         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 820
 821         wl1251_ps_elp_sleep(wl);
 822
 823 out:
 824         mutex_unlock(&wl->mutex);
 825 }
 826
 827 /* HW encryption */
 828 static int wl1251_set_key_type(struct wl1251 *wl,
 829                                struct wl1251_cmd_set_keys *key,
 830                                enum set_key_cmd cmd,
 831                                struct ieee80211_key_conf *mac80211_key,
 832                                const u8 *addr)
 833 {
 834         switch (mac80211_key->cipher) {
 835         case WLAN_CIPHER_SUITE_WEP40:
 836         case WLAN_CIPHER_SUITE_WEP104:
 837                 if (is_broadcast_ether_addr(addr))
 838                         key->key_type = KEY_WEP_DEFAULT;
 839                 else
 840                         key->key_type = KEY_WEP_ADDR;
 841
 842                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 843                 break;
 844         case WLAN_CIPHER_SUITE_TKIP:
 845                 if (is_broadcast_ether_addr(addr))
 846                         key->key_type = KEY_TKIP_MIC_GROUP;
 847                 else
 848                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 849
 850                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 851                 break;
 852         case WLAN_CIPHER_SUITE_CCMP:
 853                 if (is_broadcast_ether_addr(addr))
 854                         key->key_type = KEY_AES_GROUP;
 855                 else
 856                         key->key_type = KEY_AES_PAIRWISE;
 857                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 858                 break;
 859         default:
 860                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 861                 return -EOPNOTSUPP;
 862         }
 863
 864         return 0;
 865 }
 866
 867 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 868                              struct ieee80211_vif *vif,
 869                              struct ieee80211_sta *sta,
 870                              struct ieee80211_key_conf *key)
 871 {
 872         struct wl1251 *wl = hw->priv;
 873         struct wl1251_cmd_set_keys *wl_cmd;
 874         const u8 *addr;
 875         int ret;
 876
 877         static const u8 bcast_addr[ETH_ALEN] =
 878                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 879
 880         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 881
 882         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 883         if (!wl_cmd) {
 884                 ret = -ENOMEM;
 885                 goto out;
 886         }
 887
 888         addr = sta ? sta->addr : bcast_addr;
 889
 890         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 891         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 892         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 893                      key->cipher, key->keyidx, key->keylen, key->flags);
 894         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 895
 896         if (is_zero_ether_addr(addr)) {
 897                 /* We dont support TX only encryption */
 898                 ret = -EOPNOTSUPP;
 899                 goto out;
 900         }
 901
 902         mutex_lock(&wl->mutex);
 903
 904         ret = wl1251_ps_elp_wakeup(wl);
 905         if (ret < 0)
 906                 goto out_unlock;
 907
 908         switch (cmd) {
 909         case SET_KEY:
 910                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 911                 break;
 912         case DISABLE_KEY:
 913                 wl_cmd->key_action = KEY_REMOVE;
 914                 break;
 915         default:
 916                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 917                 break;
 918         }
 919
 920         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 921         if (ret < 0) {
 922                 wl1251_error("Set KEY type failed");
 923                 goto out_sleep;
 924         }
 925
 926         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 927                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 928
 929         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 930             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 931                 /*
 932                  * We get the key in the following form:
 933                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 934                  * but the target is expecting:
 935                  * TKIP - RX MIC - TX MIC
 936                  */
 937                 memcpy(wl_cmd->key, key->key, 16);
 938                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 939                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 940
 941         } else {
 942                 memcpy(wl_cmd->key, key->key, key->keylen);
 943         }
 944         wl_cmd->key_size = key->keylen;
 945
 946         wl_cmd->id = key->keyidx;
 947         wl_cmd->ssid_profile = 0;
 948
 949         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 950
 951         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 952         if (ret < 0) {
 953                 wl1251_warning("could not set keys");
 954                 goto out_sleep;
 955         }
 956
 957 out_sleep:
 958         wl1251_ps_elp_sleep(wl);
 959
 960 out_unlock:
 961         mutex_unlock(&wl->mutex);
 962
 963 out:
 964         kfree(wl_cmd);
 965
 966         return ret;
 967 }
 968
 969 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 970                              struct ieee80211_vif *vif,
 971                              struct cfg80211_scan_request *req)
 972 {
 973         struct wl1251 *wl = hw->priv;
 974         struct sk_buff *skb;
 975         size_t ssid_len = 0;
 976         u8 *ssid = NULL;
 977         int ret;
 978
 979         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 980
 981         if (req->n_ssids) {
 982                 ssid = req->ssids[0].ssid;
 983                 ssid_len = req->ssids[0].ssid_len;
 984         }
 985
 986         mutex_lock(&wl->mutex);
 987
 988         if (wl->scanning) {
 989                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 990                 ret = -EINVAL;
 991                 goto out;
 992         }
 993
 994         ret = wl1251_ps_elp_wakeup(wl);
 995         if (ret < 0)
 996                 goto out;
 997
 998         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 999                                      req->ie, req->ie_len);
1000         if (!skb) {
1001                 ret = -ENOMEM;
1002                 goto out;
1003         }
1004
1005         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1006                                       skb->len);
1007         dev_kfree_skb(skb);
1008         if (ret < 0)
1009                 goto out_sleep;
1010
1011         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1012         if (ret < 0)
1013                 goto out_sleep;
1014
1015         wl->scanning = true;
1016
1017         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1018                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1019         if (ret < 0) {
1020                 wl->scanning = false;
1021                 goto out_sleep;
1022         }
1023
1024 out_sleep:
1025         wl1251_ps_elp_sleep(wl);
1026
1027 out:
1028         mutex_unlock(&wl->mutex);
1029
1030         return ret;
1031 }
1032
1033 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1034 {
1035         struct wl1251 *wl = hw->priv;
1036         int ret;
1037
1038         mutex_lock(&wl->mutex);
1039
1040         ret = wl1251_ps_elp_wakeup(wl);
1041         if (ret < 0)
1042                 goto out;
1043
1044         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1045         if (ret < 0)
1046                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1047
1048         wl1251_ps_elp_sleep(wl);
1049
1050 out:
1051         mutex_unlock(&wl->mutex);
1052
1053         return ret;
1054 }
1055
1056 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1057                                        struct ieee80211_vif *vif,
1058                                        struct ieee80211_bss_conf *bss_conf,
1059                                        u32 changed)
1060 {
1061         struct wl1251 *wl = hw->priv;
1062         struct sk_buff *beacon, *skb;
1063         int ret;
1064
1065         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1066
1067         mutex_lock(&wl->mutex);
1068
1069         ret = wl1251_ps_elp_wakeup(wl);
1070         if (ret < 0)
1071                 goto out;
1072
1073         if (changed & BSS_CHANGED_CQM) {
1074                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1075                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1076                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1077                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1078                 if (ret < 0)
1079                         goto out;
1080                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1081         }
1082
1083         if (changed & BSS_CHANGED_BSSID) {
1084                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1085
1086                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1087                 if (!skb)
1088                         goto out_sleep;
1089
1090                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1091                                               skb->data, skb->len);
1092                 dev_kfree_skb(skb);
1093                 if (ret < 0)
1094                         goto out_sleep;
1095
1096                 ret = wl1251_build_qos_null_data(wl);
1097                 if (ret < 0)
1098                         goto out;
1099
1100                 if (wl->bss_type != BSS_TYPE_IBSS) {
1101                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1102                                           wl->beacon_int, wl->dtim_period);
1103                         if (ret < 0)
1104                                 goto out_sleep;
1105                 }
1106         }
1107
1108         if (changed & BSS_CHANGED_ASSOC) {
1109                 if (bss_conf->assoc) {
1110                         wl->beacon_int = bss_conf->beacon_int;
1111
1112                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1113                         if (!skb)
1114                                 goto out_sleep;
1115
1116                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1117                                                       skb->data,
1118                                                       skb->len);
1119                         dev_kfree_skb(skb);
1120                         if (ret < 0)
1121                                 goto out_sleep;
1122
1123                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1124                         if (ret < 0)
1125                                 goto out_sleep;
1126                 } else {
1127                         /* use defaults when not associated */
1128                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1129                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1130                 }
1131         }
1132         if (changed & BSS_CHANGED_ERP_SLOT) {
1133                 if (bss_conf->use_short_slot)
1134                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1135                 else
1136                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1137                 if (ret < 0) {
1138                         wl1251_warning("Set slot time failed %d", ret);
1139                         goto out_sleep;
1140                 }
1141         }
1142
1143         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1144                 if (bss_conf->use_short_preamble)
1145                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1146                 else
1147                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1148         }
1149
1150         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1151                 if (bss_conf->use_cts_prot)
1152                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1153                 else
1154                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1155                 if (ret < 0) {
1156                         wl1251_warning("Set ctsprotect failed %d", ret);
1157                         goto out_sleep;
1158                 }
1159         }
1160
1161         if (changed & BSS_CHANGED_BEACON) {
1162                 beacon = ieee80211_beacon_get(hw, vif);
1163                 if (!beacon)
1164                         goto out_sleep;
1165
1166                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1167                                               beacon->len);
1168
1169                 if (ret < 0) {
1170                         dev_kfree_skb(beacon);
1171                         goto out_sleep;
1172                 }
1173
1174                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1175                                               beacon->len);
1176
1177                 dev_kfree_skb(beacon);
1178
1179                 if (ret < 0)
1180                         goto out_sleep;
1181
1182                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1183                                   wl->channel, wl->dtim_period);
1184
1185                 if (ret < 0)
1186                         goto out_sleep;
1187         }
1188
1189 out_sleep:
1190         wl1251_ps_elp_sleep(wl);
1191
1192 out:
1193         mutex_unlock(&wl->mutex);
1194 }
1195
1196
1197 /* can't be const, mac80211 writes to this */
1198 static struct ieee80211_rate wl1251_rates[] = {
1199         { .bitrate = 10,
1200           .hw_value = 0x1,
1201           .hw_value_short = 0x1, },
1202         { .bitrate = 20,
1203           .hw_value = 0x2,
1204           .hw_value_short = 0x2,
1205           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1206         { .bitrate = 55,
1207           .hw_value = 0x4,
1208           .hw_value_short = 0x4,
1209           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1210         { .bitrate = 110,
1211           .hw_value = 0x20,
1212           .hw_value_short = 0x20,
1213           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1214         { .bitrate = 60,
1215           .hw_value = 0x8,
1216           .hw_value_short = 0x8, },
1217         { .bitrate = 90,
1218           .hw_value = 0x10,
1219           .hw_value_short = 0x10, },
1220         { .bitrate = 120,
1221           .hw_value = 0x40,
1222           .hw_value_short = 0x40, },
1223         { .bitrate = 180,
1224           .hw_value = 0x80,
1225           .hw_value_short = 0x80, },
1226         { .bitrate = 240,
1227           .hw_value = 0x200,
1228           .hw_value_short = 0x200, },
1229         { .bitrate = 360,
1230          .hw_value = 0x400,
1231          .hw_value_short = 0x400, },
1232         { .bitrate = 480,
1233           .hw_value = 0x800,
1234           .hw_value_short = 0x800, },
1235         { .bitrate = 540,
1236           .hw_value = 0x1000,
1237           .hw_value_short = 0x1000, },
1238 };
1239
1240 /* can't be const, mac80211 writes to this */
1241 static struct ieee80211_channel wl1251_channels[] = {
1242         { .hw_value = 1, .center_freq = 2412},
1243         { .hw_value = 2, .center_freq = 2417},
1244         { .hw_value = 3, .center_freq = 2422},
1245         { .hw_value = 4, .center_freq = 2427},
1246         { .hw_value = 5, .center_freq = 2432},
1247         { .hw_value = 6, .center_freq = 2437},
1248         { .hw_value = 7, .center_freq = 2442},
1249         { .hw_value = 8, .center_freq = 2447},
1250         { .hw_value = 9, .center_freq = 2452},
1251         { .hw_value = 10, .center_freq = 2457},
1252         { .hw_value = 11, .center_freq = 2462},
1253         { .hw_value = 12, .center_freq = 2467},
1254         { .hw_value = 13, .center_freq = 2472},
1255 };
1256
1257 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1258                              struct ieee80211_vif *vif, u16 queue,
1259                              const struct ieee80211_tx_queue_params *params)
1260 {
1261         enum wl1251_acx_ps_scheme ps_scheme;
1262         struct wl1251 *wl = hw->priv;
1263         int ret;
1264
1265         mutex_lock(&wl->mutex);
1266
1267         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1268
1269         ret = wl1251_ps_elp_wakeup(wl);
1270         if (ret < 0)
1271                 goto out;
1272
1273         /* mac80211 uses units of 32 usec */
1274         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1275                                 params->cw_min, params->cw_max,
1276                                 params->aifs, params->txop * 32);
1277         if (ret < 0)
1278                 goto out_sleep;
1279
1280         if (params->uapsd)
1281                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1282         else
1283                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1284
1285         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1286                                  CHANNEL_TYPE_EDCF,
1287                                  wl1251_tx_get_queue(queue), ps_scheme,
1288                                  WL1251_ACX_ACK_POLICY_LEGACY);
1289         if (ret < 0)
1290                 goto out_sleep;
1291
1292 out_sleep:
1293         wl1251_ps_elp_sleep(wl);
1294
1295 out:
1296         mutex_unlock(&wl->mutex);
1297
1298         return ret;
1299 }
1300
1301 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1302                                 struct survey_info *survey)
1303 {
1304         struct wl1251 *wl = hw->priv;
1305         struct ieee80211_conf *conf = &hw->conf;
1306
1307         if (idx != 0)
1308                 return -ENOENT;
1309
1310         survey->channel = conf->channel;
1311         survey->filled = SURVEY_INFO_NOISE_DBM;
1312         survey->noise = wl->noise;
1313
1314         return 0;
1315 }
1316
1317 /* can't be const, mac80211 writes to this */
1318 static struct ieee80211_supported_band wl1251_band_2ghz = {
1319         .channels = wl1251_channels,
1320         .n_channels = ARRAY_SIZE(wl1251_channels),
1321         .bitrates = wl1251_rates,
1322         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1323 };
1324
1325 static const struct ieee80211_ops wl1251_ops = {
1326         .start = wl1251_op_start,
1327         .stop = wl1251_op_stop,
1328         .add_interface = wl1251_op_add_interface,
1329         .remove_interface = wl1251_op_remove_interface,
1330         .config = wl1251_op_config,
1331         .configure_filter = wl1251_op_configure_filter,
1332         .tx = wl1251_op_tx,
1333         .set_key = wl1251_op_set_key,
1334         .hw_scan = wl1251_op_hw_scan,
1335         .bss_info_changed = wl1251_op_bss_info_changed,
1336         .set_rts_threshold = wl1251_op_set_rts_threshold,
1337         .conf_tx = wl1251_op_conf_tx,
1338         .get_survey = wl1251_op_get_survey,
1339 };
1340
1341 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1342 {
1343         unsigned long timeout;
1344
1345         wl1251_reg_write32(wl, EE_ADDR, offset);
1346         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1347
1348         /* EE_CTL_READ clears when data is ready */
1349         timeout = jiffies + msecs_to_jiffies(100);
1350         while (1) {
1351                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1352                         break;
1353
1354                 if (time_after(jiffies, timeout))
1355                         return -ETIMEDOUT;
1356
1357                 msleep(1);
1358         }
1359
1360         *data = wl1251_reg_read32(wl, EE_DATA);
1361         return 0;
1362 }
1363
1364 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1365                               u8 *data, size_t len)
1366 {
1367         size_t i;
1368         int ret;
1369
1370         wl1251_reg_write32(wl, EE_START, 0);
1371
1372         for (i = 0; i < len; i++) {
1373                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1374                 if (ret < 0)
1375                         return ret;
1376         }
1377
1378         return 0;
1379 }
1380
1381 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1382 {
1383         u8 mac[ETH_ALEN];
1384         int i, ret;
1385
1386         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1387
1388         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1389         if (ret < 0) {
1390                 wl1251_warning("failed to read MAC address from EEPROM");
1391                 return ret;
1392         }
1393
1394         /* MAC is stored in reverse order */
1395         for (i = 0; i < ETH_ALEN; i++)
1396                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1397
1398         return 0;
1399 }
1400
1401 /* temporary (?) hack for EEPROM dumping
1402  * (it seems this can only be done before fw is running) */
1403 static int wl1251_dump_eeprom(struct wl1251 *wl)
1404 {
1405         int ret;
1406
1407         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1408
1409         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1410         if (wl->eeprom_dump == NULL) {
1411                 ret = -ENOMEM;
1412                 goto out;
1413         }
1414
1415         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1416         if (ret != 0) {
1417                 wl1251_error("eeprom dump failed: %d", ret);
1418                 kfree(wl->eeprom_dump);
1419                 wl->eeprom_dump = NULL;
1420                 goto out;
1421         }
1422
1423         wl1251_info("eeprom dumped.");
1424
1425 out:
1426         return ret;
1427 }
1428
1429 static int wl1251_register_hw(struct wl1251 *wl)
1430 {
1431         int ret;
1432
1433         if (wl->mac80211_registered)
1434                 return 0;
1435
1436         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1437
1438         ret = ieee80211_register_hw(wl->hw);
1439         if (ret < 0) {
1440                 wl1251_error("unable to register mac80211 hw: %d", ret);
1441                 return ret;
1442         }
1443
1444         wl->mac80211_registered = true;
1445
1446         wl1251_notice("loaded");
1447
1448         return 0;
1449 }
1450
1451 int wl1251_init_ieee80211(struct wl1251 *wl)
1452 {
1453         int ret;
1454
1455         /* The tx descriptor buffer and the TKIP space */
1456         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1457                 + WL1251_TKIP_IV_SPACE;
1458
1459         /* unit us */
1460         /* FIXME: find a proper value */
1461         wl->hw->channel_change_time = 10000;
1462
1463         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1464                 IEEE80211_HW_SUPPORTS_PS |
1465                 IEEE80211_HW_BEACON_FILTER |
1466                 IEEE80211_HW_SUPPORTS_UAPSD |
1467                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1468
1469         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1470                                          BIT(NL80211_IFTYPE_ADHOC);
1471         wl->hw->wiphy->max_scan_ssids = 1;
1472         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1473
1474         wl->hw->queues = 4;
1475
1476         if (wl->use_eeprom)
1477                 wl1251_read_eeprom_mac(wl);
1478         if (wl->dump_eeprom)
1479                 wl1251_dump_eeprom(wl);
1480
1481         ret = wl1251_register_hw(wl);
1482         if (ret)
1483                 goto out;
1484
1485         wl1251_debugfs_init(wl);
1486         wl1251_notice("initialized");
1487
1488         ret = 0;
1489
1490 out:
1491         return ret;
1492 }
1493 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1494
1495 struct ieee80211_hw *wl1251_alloc_hw(void)
1496 {
1497         struct ieee80211_hw *hw;
1498         struct wl1251 *wl;
1499         int i;
1500         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1501
1502         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1503         if (!hw) {
1504                 wl1251_error("could not alloc ieee80211_hw");
1505                 return ERR_PTR(-ENOMEM);
1506         }
1507
1508         wl = hw->priv;
1509         memset(wl, 0, sizeof(*wl));
1510
1511         wl->hw = hw;
1512
1513         wl->data_in_count = 0;
1514
1515         skb_queue_head_init(&wl->tx_queue);
1516
1517         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1518         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1519         wl->channel = WL1251_DEFAULT_CHANNEL;
1520         wl->scanning = false;
1521         wl->default_key = 0;
1522         wl->listen_int = 1;
1523         wl->rx_counter = 0;
1524         wl->rx_handled = 0;
1525         wl->rx_current_buffer = 0;
1526         wl->rx_last_id = 0;
1527         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1528         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1529         wl->elp = false;
1530         wl->station_mode = STATION_ACTIVE_MODE;
1531         wl->psm_requested = false;
1532         wl->tx_queue_stopped = false;
1533         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1534         wl->rssi_thold = 0;
1535         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1536         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1537         wl->vif = NULL;
1538
1539         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1540                 wl->tx_frames[i] = NULL;
1541
1542         wl->next_tx_complete = 0;
1543
1544         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1545         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1546
1547         /*
1548          * In case our MAC address is not correctly set,
1549          * we use a random but Nokia MAC.
1550          */
1551         memcpy(wl->mac_addr, nokia_oui, 3);
1552         get_random_bytes(wl->mac_addr + 3, 3);
1553
1554         wl->state = WL1251_STATE_OFF;
1555         mutex_init(&wl->mutex);
1556
1557         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1558         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1559
1560         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1561         if (!wl->rx_descriptor) {
1562                 wl1251_error("could not allocate memory for rx descriptor");
1563                 ieee80211_free_hw(hw);
1564                 return ERR_PTR(-ENOMEM);
1565         }
1566
1567         return hw;
1568 }
1569 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1570
1571 int wl1251_free_hw(struct wl1251 *wl)
1572 {
1573         ieee80211_unregister_hw(wl->hw);
1574
1575         wl1251_debugfs_exit(wl);
1576
1577         kfree(wl->target_mem_map);
1578         kfree(wl->data_path);
1579         vfree(wl->fw);
1580         wl->fw = NULL;
1581         kfree(wl->nvs);
1582         wl->nvs = NULL;
1583
1584         kfree(wl->rx_descriptor);
1585         wl->rx_descriptor = NULL;
1586
1587         ieee80211_free_hw(wl->hw);
1588
1589         if (wl->eeprom_dump != NULL)
1590                 kfree(wl->eeprom_dump);
1591
1592         return 0;
1593 }
1594 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1595
1596 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1597 MODULE_LICENSE("GPL");
1598 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1599 MODULE_FIRMWARE(WL1251_FW_NAME);