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 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 100
 217 irqreturn_t wl1251_irq(int irq, void *cookie)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl = cookie;
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 while (skb_queue_len(&wl->tx_queue) > 0
 312                        && wl1251_tx_path_status(wl) == 0) {
 313
 314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 315                         if (skb == NULL)
 316                                 goto out_sleep;
 317
 318                         ret = wl1251_tx_frame(wl, skb);
 319                         if (ret == -EBUSY) {
 320                                 skb_queue_head(&wl->tx_queue, skb);
 321                                 break;
 322                         } else if (ret < 0) {
 323                                 dev_kfree_skb(skb);
 324                         }
 325                 }
 326
 327                 if (--ctr == 0)
 328                         break;
 329
 330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 331         } while (intr);
 332
 333 out_sleep:
 334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 335         wl1251_ps_elp_sleep(wl);
 336
 337 out:
 338         mutex_unlock(&wl->mutex);
 339         return IRQ_HANDLED;
 340 }
 341 EXPORT_SYMBOL_GPL(wl1251_irq);
 342
 343 static void wl1251_irq_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, irq_work);
 347
 348         wl1251_irq(0, wl);
 349 }
 350
 351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 352                        u16 beacon_interval, u8 dtim_period)
 353 {
 354         int ret;
 355
 356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 358                                      wl->tx_mgmt_frm_rate,
 359                                      wl->tx_mgmt_frm_mod);
 360         if (ret < 0)
 361                 goto out;
 362
 363         /*
 364          * Join command applies filters, and if we are not associated,
 365          * BSSID filter must be disabled for association to work.
 366          */
 367         if (is_zero_ether_addr(wl->bssid))
 368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 369
 370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 371                               dtim_period);
 372         if (ret < 0)
 373                 goto out;
 374
 375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 376         if (ret < 0)
 377                 wl1251_warning("join timeout");
 378
 379         wl1251_no_ps_event(wl);
 380
 381 out:
 382         return ret;
 383 }
 384
 385 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 386 {
 387         struct wl1251 *wl = hw->priv;
 388         unsigned long flags;
 389
 390         skb_queue_tail(&wl->tx_queue, skb);
 391
 392         /*
 393          * The chip specific setup must run before the first TX packet -
 394          * before that, the tx_work will not be initialized!
 395          */
 396
 397         ieee80211_queue_work(wl->hw, &wl->tx_work);
 398
 399         /*
 400          * The workqueue is slow to process the tx_queue and we need stop
 401          * the queue here, otherwise the queue will get too long.
 402          */
 403         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 404                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 405
 406                 spin_lock_irqsave(&wl->wl_lock, flags);
 407                 ieee80211_stop_queues(wl->hw);
 408                 wl->tx_queue_stopped = true;
 409                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 410         }
 411 }
 412
 413 static int wl1251_op_start(struct ieee80211_hw *hw)
 414 {
 415         struct wl1251 *wl = hw->priv;
 416         struct wiphy *wiphy = hw->wiphy;
 417         int ret = 0;
 418
 419         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 420
 421         mutex_lock(&wl->mutex);
 422
 423         if (wl->state != WL1251_STATE_OFF) {
 424                 wl1251_error("cannot start because not in off state: %d",
 425                              wl->state);
 426                 ret = -EBUSY;
 427                 goto out;
 428         }
 429
 430         ret = wl1251_chip_wakeup(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         ret = wl1251_boot(wl);
 435         if (ret < 0)
 436                 goto out;
 437
 438         ret = wl1251_hw_init(wl);
 439         if (ret < 0)
 440                 goto out;
 441
 442         ret = wl1251_acx_station_id(wl);
 443         if (ret < 0)
 444                 goto out;
 445
 446         wl->state = WL1251_STATE_ON;
 447
 448         wl1251_info("firmware booted (%s)", wl->fw_ver);
 449
 450         /* update hw/fw version info in wiphy struct */
 451         wiphy->hw_version = wl->chip_id;
 452         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 453
 454 out:
 455         if (ret < 0)
 456                 wl1251_power_off(wl);
 457
 458         mutex_unlock(&wl->mutex);
 459
 460         return ret;
 461 }
 462
 463 static void wl1251_op_stop(struct ieee80211_hw *hw)
 464 {
 465         struct wl1251 *wl = hw->priv;
 466
 467         wl1251_info("down");
 468
 469         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 470
 471         mutex_lock(&wl->mutex);
 472
 473         WARN_ON(wl->state != WL1251_STATE_ON);
 474
 475         if (wl->scanning) {
 476                 ieee80211_scan_completed(wl->hw, true);
 477                 wl->scanning = false;
 478         }
 479
 480         wl->state = WL1251_STATE_OFF;
 481
 482         wl1251_disable_interrupts(wl);
 483
 484         mutex_unlock(&wl->mutex);
 485
 486         cancel_work_sync(&wl->irq_work);
 487         cancel_work_sync(&wl->tx_work);
 488         cancel_delayed_work_sync(&wl->ps_work);
 489         cancel_delayed_work_sync(&wl->elp_work);
 490
 491         mutex_lock(&wl->mutex);
 492
 493         /* let's notify MAC80211 about the remaining pending TX frames */
 494         wl1251_tx_flush(wl);
 495         wl1251_power_off(wl);
 496
 497         memset(wl->bssid, 0, ETH_ALEN);
 498         wl->listen_int = 1;
 499         wl->bss_type = MAX_BSS_TYPE;
 500
 501         wl->data_in_count = 0;
 502         wl->rx_counter = 0;
 503         wl->rx_handled = 0;
 504         wl->rx_current_buffer = 0;
 505         wl->rx_last_id = 0;
 506         wl->next_tx_complete = 0;
 507         wl->elp = false;
 508         wl->station_mode = STATION_ACTIVE_MODE;
 509         wl->tx_queue_stopped = false;
 510         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 511         wl->rssi_thold = 0;
 512         wl->channel = WL1251_DEFAULT_CHANNEL;
 513         wl->monitor_present = false;
 514         wl->joined = false;
 515         wl->long_doze_mode_set = false;
 516
 517         wl1251_debugfs_reset(wl);
 518
 519         mutex_unlock(&wl->mutex);
 520 }
 521
 522 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 523                                    struct ieee80211_vif *vif)
 524 {
 525         struct wl1251 *wl = hw->priv;
 526         int ret = 0;
 527
 528         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 529                      vif->type, vif->addr);
 530
 531         mutex_lock(&wl->mutex);
 532         if (wl->vif) {
 533                 ret = -EBUSY;
 534                 goto out;
 535         }
 536
 537         wl->vif = vif;
 538
 539         switch (vif->type) {
 540         case NL80211_IFTYPE_STATION:
 541                 wl->bss_type = BSS_TYPE_STA_BSS;
 542                 break;
 543         case NL80211_IFTYPE_ADHOC:
 544                 wl->bss_type = BSS_TYPE_IBSS;
 545                 break;
 546         default:
 547                 ret = -EOPNOTSUPP;
 548                 goto out;
 549         }
 550
 551         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 552                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 553                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 554                 ret = wl1251_acx_station_id(wl);
 555                 if (ret < 0)
 556                         goto out;
 557         }
 558
 559 out:
 560         mutex_unlock(&wl->mutex);
 561         return ret;
 562 }
 563
 564 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 565                                          struct ieee80211_vif *vif)
 566 {
 567         struct wl1251 *wl = hw->priv;
 568
 569         mutex_lock(&wl->mutex);
 570         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 571         wl->vif = NULL;
 572         memset(wl->bssid, 0, ETH_ALEN);
 573         mutex_unlock(&wl->mutex);
 574 }
 575
 576 static int wl1251_build_null_data(struct wl1251 *wl)
 577 {
 578         struct sk_buff *skb = NULL;
 579         int size;
 580         void *ptr;
 581         int ret = -ENOMEM;
 582
 583
 584         if (wl->bss_type == BSS_TYPE_IBSS) {
 585                 size = sizeof(struct wl12xx_null_data_template);
 586                 ptr = NULL;
 587         } else {
 588                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 589                 if (!skb)
 590                         goto out;
 591                 size = skb->len;
 592                 ptr = skb->data;
 593         }
 594
 595         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 596
 597 out:
 598         dev_kfree_skb(skb);
 599         if (ret)
 600                 wl1251_warning("cmd buld null data failed %d", ret);
 601
 602         return ret;
 603
 604 }
 605
 606 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 607 {
 608         struct ieee80211_qos_hdr template;
 609
 610         memset(&template, 0, sizeof(template));
 611
 612         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 613         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 614         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 615
 616         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 617                                              IEEE80211_STYPE_QOS_NULLFUNC |
 618                                              IEEE80211_FCTL_TODS);
 619
 620         /* FIXME: not sure what priority to use here */
 621         template.qos_ctrl = cpu_to_le16(0);
 622
 623         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 624                                        sizeof(template));
 625 }
 626
 627 static void wl1251_ps_work(struct work_struct *work)
 628 {
 629         struct delayed_work *dwork;
 630         struct wl1251 *wl;
 631         unsigned long diff, wait;
 632         bool need_ps;
 633         bool have_ps;
 634         int ret;
 635         int i;
 636
 637         dwork = container_of(work, struct delayed_work, work);
 638         wl = container_of(dwork, struct wl1251, ps_work);
 639
 640         mutex_lock(&wl->mutex);
 641
 642         /* don't change PS modes while still transitioning, to avoid possbile
 643          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 644         if (wl->ps_transitioning) {
 645                 diff = jiffies - wl->ps_change_jiffies;
 646                 if (diff > msecs_to_jiffies(500)) {
 647                         wl1251_error("PS change taking too long: %lu", diff);
 648                         wl->ps_transitioning = false;
 649                 } else {
 650                         //wl1251_error("PS still transitioning");
 651                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 652                                 msecs_to_jiffies(50));
 653                         goto out;
 654                 }
 655         }
 656
 657         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 658         need_ps = wl->psm_requested && !wl->bss_lost
 659                 && wl->rate < wl->ps_rate_threshold;
 660
 661         if (need_ps == have_ps) {
 662                 //wl1251_info("ps: already in mode %d", have_ps);
 663                 goto out;
 664         }
 665
 666         /* don't enter PS if there was recent activity */
 667         if (need_ps) {
 668                 wait = 0;
 669
 670                 diff = jiffies - wl->last_no_ps_jiffies[1];
 671                 if (diff < msecs_to_jiffies(1000))
 672                         wait = msecs_to_jiffies(1000) - diff + 1;
 673
 674                 diff = jiffies - wl->last_no_ps_jiffies[0];
 675                 if (diff < msecs_to_jiffies(3000))
 676                         wait += msecs_to_jiffies(1000);
 677
 678                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 679                         if (wl->tx_frames[i] != NULL) {
 680                                 //wl1251_error("  frm %d busy", i);
 681                                 if (wait < msecs_to_jiffies(50))
 682                                         wait = msecs_to_jiffies(50);
 683                                 break;
 684                         }
 685                 }
 686
 687                 if (wait > 0) {
 688                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 689                         goto out;
 690                 }
 691         }
 692
 693         ret = wl1251_ps_elp_wakeup(wl);
 694         if (ret < 0)
 695                 goto out;
 696
 697         if (need_ps) {
 698                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 699                                             wl->dtim_period);
 700         }
 701         ret = wl1251_ps_set_mode(wl,
 702                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 703         if (ret < 0)
 704                 goto out_sleep;
 705
 706         // wl1251_info("psm %d, r %u", need_ps, wl->rate);
 707
 708 out_sleep:
 709         wl1251_ps_elp_sleep(wl);
 710
 711 out:
 712         mutex_unlock(&wl->mutex);
 713 }
 714
 715 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 716 {
 717         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 718 }
 719
 720 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 721 {
 722         struct wl1251 *wl = hw->priv;
 723         struct ieee80211_conf *conf = &hw->conf;
 724         int channel, ret = 0;
 725
 726         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 727
 728         wl1251_debug(DEBUG_MAC80211,
 729                      "mac80211 config ch %d monitor %s psm %s power %d",
 730                      channel,
 731                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 732                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 733                      conf->power_level);
 734
 735         mutex_lock(&wl->mutex);
 736
 737         ret = wl1251_ps_elp_wakeup(wl);
 738         if (ret < 0)
 739                 goto out;
 740
 741         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 742                 u32 mode;
 743
 744                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 745                         wl->monitor_present = true;
 746                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 747                 } else {
 748                         wl->monitor_present = false;
 749                         mode = 0;
 750                 }
 751
 752                 ret = wl1251_acx_feature_cfg(wl, mode);
 753                 if (ret < 0)
 754                         goto out_sleep;
 755         }
 756
 757         if (channel != wl->channel) {
 758                 wl->channel = channel;
 759
 760                 /*
 761                  * Use ENABLE_RX command for channel switching when no
 762                  * interface is present (monitor mode only).
 763                  * This leaves the tx path disabled in firmware, whereas
 764                  * the usual JOIN command seems to transmit some frames
 765                  * at firmware level.
 766                  *
 767                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 768                  * one join has to be performed before CMD_ENABLE_RX can
 769                  * properly switch channels (join will be done by CONF_IDLE).
 770                  */
 771                 if (wl->vif == NULL) {
 772                         wl->bss_type = BSS_TYPE_STA_BSS;
 773                         wl->joined = false;
 774                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 775                 } else {
 776                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 777                                           wl->beacon_int, wl->dtim_period);
 778                 }
 779                 if (ret < 0)
 780                         goto out_sleep;
 781         }
 782
 783         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 784                 wl1251_debug(DEBUG_PSM, "psm enabled");
 785
 786                 wl->psm_requested = true;
 787
 788                 wl->dtim_period = conf->ps_dtim_period;
 789
 790                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 791         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 792                 wl1251_debug(DEBUG_PSM, "psm disabled");
 793
 794                 wl->psm_requested = false;
 795
 796                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 797         }
 798
 799         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 800                 if (conf->flags & IEEE80211_CONF_IDLE) {
 801                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 802                         if (ret < 0)
 803                                 goto out_sleep;
 804                 } else {
 805                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 806                         if (ret < 0)
 807                                 goto out_sleep;
 808
 809                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 810                         if (ret < 0)
 811                                 wl1251_error("error waiting for wakeup");
 812
 813                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 814                                           wl->beacon_int, wl->dtim_period);
 815                         if (ret < 0)
 816                                 goto out_sleep;
 817                 }
 818         }
 819
 820         if (conf->power_level != wl->power_level) {
 821                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 822                 if (ret < 0)
 823                         goto out_sleep;
 824
 825                 wl->power_level = conf->power_level;
 826         }
 827
 828 out_sleep:
 829         wl1251_ps_elp_sleep(wl);
 830
 831 out:
 832         mutex_unlock(&wl->mutex);
 833
 834         return ret;
 835 }
 836
 837 struct wl1251_filter_params {
 838         bool enabled;
 839         int mc_list_length;
 840         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 841 };
 842
 843 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 844                                        struct netdev_hw_addr_list *mc_list)
 845 {
 846         struct wl1251_filter_params *fp;
 847         struct netdev_hw_addr *ha;
 848         struct wl1251 *wl = hw->priv;
 849
 850         if (unlikely(wl->state == WL1251_STATE_OFF))
 851                 return 0;
 852
 853         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 854         if (!fp) {
 855                 wl1251_error("Out of memory setting filters.");
 856                 return 0;
 857         }
 858
 859         /* update multicast filtering parameters */
 860         fp->mc_list_length = 0;
 861         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 862                 fp->enabled = false;
 863         } else {
 864                 fp->enabled = true;
 865                 netdev_hw_addr_list_for_each(ha, mc_list) {
 866                         memcpy(fp->mc_list[fp->mc_list_length],
 867                                         ha->addr, ETH_ALEN);
 868                         fp->mc_list_length++;
 869                 }
 870         }
 871
 872         return (u64)(unsigned long)fp;
 873 }
 874
 875 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 876                                   FIF_ALLMULTI | \
 877                                   FIF_FCSFAIL | \
 878                                   FIF_BCN_PRBRESP_PROMISC | \
 879                                   FIF_CONTROL | \
 880                                   FIF_OTHER_BSS | \
 881                                   FIF_PROBE_REQ)
 882
 883 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 884                                        unsigned int changed,
 885                                        unsigned int *total, u64 multicast)
 886 {
 887         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 888         struct wl1251 *wl = hw->priv;
 889         int ret;
 890
 891         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 892
 893         *total &= WL1251_SUPPORTED_FILTERS;
 894         changed &= WL1251_SUPPORTED_FILTERS;
 895
 896         if (changed == 0) {
 897                 /* no filters which we support changed */
 898                 kfree(fp);
 899                 return;
 900         }
 901
 902         mutex_lock(&wl->mutex);
 903
 904         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 905         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 906
 907         if (*total & FIF_PROMISC_IN_BSS) {
 908                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 909                 wl->rx_config |= CFG_RX_ALL_GOOD;
 910         }
 911         if (*total & FIF_ALLMULTI)
 912                 /*
 913                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 914                  * all multicast frames
 915                  */
 916                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 917         if (*total & FIF_FCSFAIL)
 918                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 919         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 920                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 921                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 922         }
 923         if (*total & FIF_CONTROL)
 924                 wl->rx_filter |= CFG_RX_CTL_EN;
 925         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 926                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 927         if (*total & FIF_PROBE_REQ)
 928                 wl->rx_filter |= CFG_RX_PREQ_EN;
 929
 930         if (wl->state == WL1251_STATE_OFF)
 931                 goto out;
 932
 933         ret = wl1251_ps_elp_wakeup(wl);
 934         if (ret < 0)
 935                 goto out;
 936
 937         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 938                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 939         else if (fp)
 940                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 941                                                    fp->mc_list,
 942                                                    fp->mc_list_length);
 943         if (ret < 0)
 944                 goto out;
 945
 946         /* send filters to firmware */
 947         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 948
 949         wl1251_ps_elp_sleep(wl);
 950
 951 out:
 952         mutex_unlock(&wl->mutex);
 953         kfree(fp);
 954 }
 955
 956 /* HW encryption */
 957 static int wl1251_set_key_type(struct wl1251 *wl,
 958                                struct wl1251_cmd_set_keys *key,
 959                                enum set_key_cmd cmd,
 960                                struct ieee80211_key_conf *mac80211_key,
 961                                const u8 *addr)
 962 {
 963         switch (mac80211_key->cipher) {
 964         case WLAN_CIPHER_SUITE_WEP40:
 965         case WLAN_CIPHER_SUITE_WEP104:
 966                 if (is_broadcast_ether_addr(addr))
 967                         key->key_type = KEY_WEP_DEFAULT;
 968                 else
 969                         key->key_type = KEY_WEP_ADDR;
 970
 971                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 972                 break;
 973         case WLAN_CIPHER_SUITE_TKIP:
 974                 if (is_broadcast_ether_addr(addr))
 975                         key->key_type = KEY_TKIP_MIC_GROUP;
 976                 else
 977                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 978
 979                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 980                 break;
 981         case WLAN_CIPHER_SUITE_CCMP:
 982                 if (is_broadcast_ether_addr(addr))
 983                         key->key_type = KEY_AES_GROUP;
 984                 else
 985                         key->key_type = KEY_AES_PAIRWISE;
 986                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 987                 break;
 988         default:
 989                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 990                 return -EOPNOTSUPP;
 991         }
 992
 993         return 0;
 994 }
 995
 996 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 997                              struct ieee80211_vif *vif,
 998                              struct ieee80211_sta *sta,
 999                              struct ieee80211_key_conf *key)
1000 {
1001         struct wl1251 *wl = hw->priv;
1002         struct wl1251_cmd_set_keys *wl_cmd;
1003         const u8 *addr;
1004         int ret;
1005
1006         static const u8 bcast_addr[ETH_ALEN] =
1007                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1008
1009         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1010
1011         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1012         if (!wl_cmd) {
1013                 ret = -ENOMEM;
1014                 goto out;
1015         }
1016
1017         addr = sta ? sta->addr : bcast_addr;
1018
1019         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1020         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1021         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1022                      key->cipher, key->keyidx, key->keylen, key->flags);
1023         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1024
1025         if (is_zero_ether_addr(addr)) {
1026                 /* We dont support TX only encryption */
1027                 ret = -EOPNOTSUPP;
1028                 goto out;
1029         }
1030
1031         mutex_lock(&wl->mutex);
1032
1033         switch (cmd) {
1034         case SET_KEY:
1035                 if (wl->monitor_present) {
1036                         ret = -EOPNOTSUPP;
1037                         goto out_unlock;
1038                 }
1039                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1040                 break;
1041         case DISABLE_KEY:
1042                 wl_cmd->key_action = KEY_REMOVE;
1043                 break;
1044         default:
1045                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1046                 break;
1047         }
1048
1049         ret = wl1251_ps_elp_wakeup(wl);
1050         if (ret < 0)
1051                 goto out_unlock;
1052
1053         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1054         if (ret < 0) {
1055                 wl1251_error("Set KEY type failed");
1056                 goto out_sleep;
1057         }
1058
1059         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1060                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1061
1062         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1063             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1064                 /*
1065                  * We get the key in the following form:
1066                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1067                  * but the target is expecting:
1068                  * TKIP - RX MIC - TX MIC
1069                  */
1070                 memcpy(wl_cmd->key, key->key, 16);
1071                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1072                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1073
1074         } else {
1075                 memcpy(wl_cmd->key, key->key, key->keylen);
1076         }
1077         wl_cmd->key_size = key->keylen;
1078
1079         wl_cmd->id = key->keyidx;
1080         wl_cmd->ssid_profile = 0;
1081
1082         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1083
1084         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1085         if (ret < 0) {
1086                 wl1251_warning("could not set keys");
1087                 goto out_sleep;
1088         }
1089
1090 out_sleep:
1091         wl1251_ps_elp_sleep(wl);
1092
1093 out_unlock:
1094         mutex_unlock(&wl->mutex);
1095
1096 out:
1097         kfree(wl_cmd);
1098
1099         return ret;
1100 }
1101
1102 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1103                              struct ieee80211_vif *vif,
1104                              struct cfg80211_scan_request *req)
1105 {
1106         struct wl1251 *wl = hw->priv;
1107         struct sk_buff *skb;
1108         size_t ssid_len = 0;
1109         u8 *ssid = NULL;
1110         int ret;
1111
1112         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1113
1114         if (req->n_ssids) {
1115                 ssid = req->ssids[0].ssid;
1116                 ssid_len = req->ssids[0].ssid_len;
1117         }
1118
1119         mutex_lock(&wl->mutex);
1120
1121         if (wl->scanning) {
1122                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1123                 ret = -EINVAL;
1124                 goto out;
1125         }
1126
1127         ret = wl1251_ps_elp_wakeup(wl);
1128         if (ret < 0)
1129                 goto out;
1130
1131         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1132                                      req->ie, req->ie_len);
1133         if (!skb) {
1134                 ret = -ENOMEM;
1135                 goto out;
1136         }
1137
1138         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1139                                       skb->len);
1140         dev_kfree_skb(skb);
1141         if (ret < 0)
1142                 goto out_sleep;
1143
1144         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1145         if (ret < 0)
1146                 goto out_sleep;
1147
1148         wl->scanning = true;
1149
1150         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1151                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1152         if (ret < 0) {
1153                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1154                 wl->scanning = false;
1155                 goto out_sleep;
1156         }
1157
1158 out_sleep:
1159         wl1251_ps_elp_sleep(wl);
1160
1161 out:
1162         mutex_unlock(&wl->mutex);
1163
1164         return ret;
1165 }
1166
1167 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1168 {
1169         struct wl1251 *wl = hw->priv;
1170         int ret;
1171
1172         mutex_lock(&wl->mutex);
1173
1174         ret = wl1251_ps_elp_wakeup(wl);
1175         if (ret < 0)
1176                 goto out;
1177
1178         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1179         if (ret < 0)
1180                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1181
1182         wl1251_ps_elp_sleep(wl);
1183
1184 out:
1185         mutex_unlock(&wl->mutex);
1186
1187         return ret;
1188 }
1189
1190 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1191                                        struct ieee80211_vif *vif,
1192                                        struct ieee80211_bss_conf *bss_conf,
1193                                        u32 changed)
1194 {
1195         struct wl1251 *wl = hw->priv;
1196         struct sk_buff *beacon, *skb;
1197         bool do_join = false;
1198         bool enable;
1199         int ret;
1200
1201         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1202
1203         mutex_lock(&wl->mutex);
1204
1205         ret = wl1251_ps_elp_wakeup(wl);
1206         if (ret < 0)
1207                 goto out;
1208
1209         if (changed & BSS_CHANGED_CQM) {
1210                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1211                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1212                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1213                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1214                 if (ret < 0)
1215                         goto out;
1216                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1217         }
1218
1219         if ((changed & BSS_CHANGED_BSSID) &&
1220             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1221                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1222
1223                 if (!is_zero_ether_addr(wl->bssid)) {
1224                         ret = wl1251_build_null_data(wl);
1225                         if (ret < 0)
1226                                 goto out_sleep;
1227
1228                         ret = wl1251_build_qos_null_data(wl);
1229                         if (ret < 0)
1230                                 goto out_sleep;
1231
1232                         do_join = true;
1233                 }
1234         }
1235
1236         if (changed & BSS_CHANGED_ASSOC) {
1237                 if (bss_conf->assoc) {
1238                         wl->beacon_int = bss_conf->beacon_int;
1239
1240                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1241                         if (!skb)
1242                                 goto out_sleep;
1243
1244                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1245                                                       skb->data,
1246                                                       skb->len);
1247                         dev_kfree_skb(skb);
1248                         if (ret < 0)
1249                                 goto out_sleep;
1250
1251                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1252                         if (ret < 0)
1253                                 goto out_sleep;
1254                 } else {
1255                         /* use defaults when not associated */
1256                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1257                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1258                 }
1259         }
1260         if (changed & BSS_CHANGED_ERP_SLOT) {
1261                 if (bss_conf->use_short_slot)
1262                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1263                 else
1264                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1265                 if (ret < 0) {
1266                         wl1251_warning("Set slot time failed %d", ret);
1267                         goto out_sleep;
1268                 }
1269         }
1270
1271         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1272                 if (bss_conf->use_short_preamble)
1273                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1274                 else
1275                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1276         }
1277
1278         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1279                 if (bss_conf->use_cts_prot)
1280                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1281                 else
1282                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1283                 if (ret < 0) {
1284                         wl1251_warning("Set ctsprotect failed %d", ret);
1285                         goto out_sleep;
1286                 }
1287         }
1288
1289         if (changed & BSS_CHANGED_ARP_FILTER) {
1290                 __be32 addr = bss_conf->arp_addr_list[0];
1291                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1292
1293                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1294                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1295
1296                 if (ret < 0)
1297                         goto out_sleep;
1298         }
1299
1300         if (changed & BSS_CHANGED_BEACON) {
1301                 beacon = ieee80211_beacon_get(hw, vif);
1302                 if (!beacon)
1303                         goto out_sleep;
1304
1305                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1306                                               beacon->len);
1307
1308                 if (ret < 0) {
1309                         dev_kfree_skb(beacon);
1310                         goto out_sleep;
1311                 }
1312
1313                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1314                                               beacon->len);
1315
1316                 dev_kfree_skb(beacon);
1317
1318                 if (ret < 0)
1319                         goto out_sleep;
1320
1321                 do_join = true;
1322         }
1323
1324         if (do_join) {
1325                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1326                                   wl->beacon_int, wl->dtim_period);
1327                 if (ret < 0)
1328                         goto out_sleep;
1329         }
1330
1331 out_sleep:
1332         wl1251_ps_elp_sleep(wl);
1333
1334 out:
1335         mutex_unlock(&wl->mutex);
1336 }
1337
1338
1339 /* can't be const, mac80211 writes to this */
1340 static struct ieee80211_rate wl1251_rates[] = {
1341         { .bitrate = 10,
1342           .hw_value = 0x1,
1343           .hw_value_short = 0x1, },
1344         { .bitrate = 20,
1345           .hw_value = 0x2,
1346           .hw_value_short = 0x2,
1347           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1348         { .bitrate = 55,
1349           .hw_value = 0x4,
1350           .hw_value_short = 0x4,
1351           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1352         { .bitrate = 110,
1353           .hw_value = 0x20,
1354           .hw_value_short = 0x20,
1355           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1356         { .bitrate = 60,
1357           .hw_value = 0x8,
1358           .hw_value_short = 0x8, },
1359         { .bitrate = 90,
1360           .hw_value = 0x10,
1361           .hw_value_short = 0x10, },
1362         { .bitrate = 120,
1363           .hw_value = 0x40,
1364           .hw_value_short = 0x40, },
1365         { .bitrate = 180,
1366           .hw_value = 0x80,
1367           .hw_value_short = 0x80, },
1368         { .bitrate = 240,
1369           .hw_value = 0x200,
1370           .hw_value_short = 0x200, },
1371         { .bitrate = 360,
1372          .hw_value = 0x400,
1373          .hw_value_short = 0x400, },
1374         { .bitrate = 480,
1375           .hw_value = 0x800,
1376           .hw_value_short = 0x800, },
1377         { .bitrate = 540,
1378           .hw_value = 0x1000,
1379           .hw_value_short = 0x1000, },
1380 };
1381
1382 /* can't be const, mac80211 writes to this */
1383 static struct ieee80211_channel wl1251_channels[] = {
1384         { .hw_value = 1, .center_freq = 2412},
1385         { .hw_value = 2, .center_freq = 2417},
1386         { .hw_value = 3, .center_freq = 2422},
1387         { .hw_value = 4, .center_freq = 2427},
1388         { .hw_value = 5, .center_freq = 2432},
1389         { .hw_value = 6, .center_freq = 2437},
1390         { .hw_value = 7, .center_freq = 2442},
1391         { .hw_value = 8, .center_freq = 2447},
1392         { .hw_value = 9, .center_freq = 2452},
1393         { .hw_value = 10, .center_freq = 2457},
1394         { .hw_value = 11, .center_freq = 2462},
1395         { .hw_value = 12, .center_freq = 2467},
1396         { .hw_value = 13, .center_freq = 2472},
1397 };
1398
1399 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1400                              struct ieee80211_vif *vif, u16 queue,
1401                              const struct ieee80211_tx_queue_params *params)
1402 {
1403         enum wl1251_acx_ps_scheme ps_scheme;
1404         struct wl1251 *wl = hw->priv;
1405         int ret;
1406
1407         mutex_lock(&wl->mutex);
1408
1409         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1410
1411         ret = wl1251_ps_elp_wakeup(wl);
1412         if (ret < 0)
1413                 goto out;
1414
1415         /* mac80211 uses units of 32 usec */
1416         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1417                                 params->cw_min, params->cw_max,
1418                                 params->aifs, params->txop * 32);
1419         if (ret < 0)
1420                 goto out_sleep;
1421
1422         if (params->uapsd)
1423                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1424         else
1425                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1426
1427         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1428                                  CHANNEL_TYPE_EDCF,
1429                                  wl1251_tx_get_queue(queue), ps_scheme,
1430                                  WL1251_ACX_ACK_POLICY_LEGACY);
1431         if (ret < 0)
1432                 goto out_sleep;
1433
1434 out_sleep:
1435         wl1251_ps_elp_sleep(wl);
1436
1437 out:
1438         mutex_unlock(&wl->mutex);
1439
1440         return ret;
1441 }
1442
1443 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1444                                 struct survey_info *survey)
1445 {
1446         struct wl1251 *wl = hw->priv;
1447         struct ieee80211_conf *conf = &hw->conf;
1448
1449         if (idx != 0)
1450                 return -ENOENT;
1451
1452         survey->channel = conf->channel;
1453         survey->filled = SURVEY_INFO_NOISE_DBM;
1454         survey->noise = wl->noise;
1455
1456         return 0;
1457 }
1458
1459 /* can't be const, mac80211 writes to this */
1460 static struct ieee80211_supported_band wl1251_band_2ghz = {
1461         .channels = wl1251_channels,
1462         .n_channels = ARRAY_SIZE(wl1251_channels),
1463         .bitrates = wl1251_rates,
1464         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1465 };
1466
1467 static const struct ieee80211_ops wl1251_ops = {
1468         .start = wl1251_op_start,
1469         .stop = wl1251_op_stop,
1470         .add_interface = wl1251_op_add_interface,
1471         .remove_interface = wl1251_op_remove_interface,
1472         .config = wl1251_op_config,
1473         .prepare_multicast = wl1251_op_prepare_multicast,
1474         .configure_filter = wl1251_op_configure_filter,
1475         .tx = wl1251_op_tx,
1476         .set_key = wl1251_op_set_key,
1477         .hw_scan = wl1251_op_hw_scan,
1478         .bss_info_changed = wl1251_op_bss_info_changed,
1479         .set_rts_threshold = wl1251_op_set_rts_threshold,
1480         .conf_tx = wl1251_op_conf_tx,
1481         .get_survey = wl1251_op_get_survey,
1482 };
1483
1484 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1485 {
1486         unsigned long timeout;
1487
1488         wl1251_reg_write32(wl, EE_ADDR, offset);
1489         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1490
1491         /* EE_CTL_READ clears when data is ready */
1492         timeout = jiffies + msecs_to_jiffies(100);
1493         while (1) {
1494                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1495                         break;
1496
1497                 if (time_after(jiffies, timeout))
1498                         return -ETIMEDOUT;
1499
1500                 msleep(1);
1501         }
1502
1503         *data = wl1251_reg_read32(wl, EE_DATA);
1504         return 0;
1505 }
1506
1507 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1508                               u8 *data, size_t len)
1509 {
1510         size_t i;
1511         int ret;
1512
1513         wl1251_reg_write32(wl, EE_START, 0);
1514
1515         for (i = 0; i < len; i++) {
1516                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1517                 if (ret < 0)
1518                         return ret;
1519         }
1520
1521         return 0;
1522 }
1523
1524 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1525 {
1526         u8 mac[ETH_ALEN];
1527         int i, ret;
1528
1529         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1530
1531         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1532         if (ret < 0) {
1533                 wl1251_warning("failed to read MAC address from EEPROM");
1534                 return ret;
1535         }
1536
1537         /* MAC is stored in reverse order */
1538         for (i = 0; i < ETH_ALEN; i++)
1539                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1540
1541         return 0;
1542 }
1543
1544 /* temporary (?) hack for EEPROM dumping
1545  * (it seems this can only be done before fw is running) */
1546 static int wl1251_dump_eeprom(struct wl1251 *wl)
1547 {
1548         int ret;
1549
1550         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1551
1552         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1553         if (wl->eeprom_dump == NULL) {
1554                 ret = -ENOMEM;
1555                 goto out;
1556         }
1557
1558         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1559         if (ret != 0) {
1560                 wl1251_error("eeprom dump failed: %d", ret);
1561                 kfree(wl->eeprom_dump);
1562                 wl->eeprom_dump = NULL;
1563                 goto out;
1564         }
1565
1566         wl1251_info("eeprom dumped.");
1567
1568 out:
1569         return ret;
1570 }
1571
1572 static int wl1251_register_hw(struct wl1251 *wl)
1573 {
1574         int ret;
1575
1576         if (wl->mac80211_registered)
1577                 return 0;
1578
1579         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1580
1581         ret = ieee80211_register_hw(wl->hw);
1582         if (ret < 0) {
1583                 wl1251_error("unable to register mac80211 hw: %d", ret);
1584                 return ret;
1585         }
1586
1587         wl->mac80211_registered = true;
1588
1589         wl1251_notice("loaded");
1590
1591         return 0;
1592 }
1593
1594 int wl1251_init_ieee80211(struct wl1251 *wl)
1595 {
1596         int ret;
1597
1598         /* The tx descriptor buffer and the TKIP space */
1599         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1600                 + WL1251_TKIP_IV_SPACE;
1601
1602         /* unit us */
1603         /* FIXME: find a proper value */
1604         wl->hw->channel_change_time = 10000;
1605
1606         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1607                 IEEE80211_HW_SUPPORTS_PS |
1608                 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
1609                 IEEE80211_HW_BEACON_FILTER |
1610                 IEEE80211_HW_SUPPORTS_UAPSD |
1611                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1612
1613         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1614                                          BIT(NL80211_IFTYPE_ADHOC);
1615         wl->hw->wiphy->max_scan_ssids = 1;
1616         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1617
1618         wl->hw->queues = 4;
1619
1620         if (wl->use_eeprom)
1621                 wl1251_read_eeprom_mac(wl);
1622         if (wl->dump_eeprom)
1623                 wl1251_dump_eeprom(wl);
1624
1625         ret = wl1251_register_hw(wl);
1626         if (ret)
1627                 goto out;
1628
1629         wl1251_debugfs_init(wl);
1630         wl1251_notice("initialized");
1631
1632         ret = 0;
1633
1634 out:
1635         return ret;
1636 }
1637 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1638
1639 struct ieee80211_hw *wl1251_alloc_hw(void)
1640 {
1641         struct ieee80211_hw *hw;
1642         struct wl1251 *wl;
1643         int i;
1644         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1645
1646         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1647         if (!hw) {
1648                 wl1251_error("could not alloc ieee80211_hw");
1649                 return ERR_PTR(-ENOMEM);
1650         }
1651
1652         wl = hw->priv;
1653         memset(wl, 0, sizeof(*wl));
1654
1655         wl->hw = hw;
1656
1657         wl->data_in_count = 0;
1658
1659         skb_queue_head_init(&wl->tx_queue);
1660
1661         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1662         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1663         wl->channel = WL1251_DEFAULT_CHANNEL;
1664         wl->monitor_present = false;
1665         wl->joined = false;
1666         wl->scanning = false;
1667         wl->bss_type = MAX_BSS_TYPE;
1668         wl->default_key = 0;
1669         wl->listen_int = 1;
1670         wl->rx_counter = 0;
1671         wl->rx_handled = 0;
1672         wl->rx_current_buffer = 0;
1673         wl->rx_last_id = 0;
1674         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1675         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1676         wl->elp = false;
1677         wl->station_mode = STATION_ACTIVE_MODE;
1678         wl->psm_requested = false;
1679         wl->tx_queue_stopped = false;
1680         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1681         wl->rssi_thold = 0;
1682         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1683         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1684         wl->vif = NULL;
1685         wl->ps_rate_threshold = 100000;
1686
1687         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1688                 wl->tx_frames[i] = NULL;
1689
1690         wl->next_tx_complete = 0;
1691
1692         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1693         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1694
1695         /*
1696          * In case our MAC address is not correctly set,
1697          * we use a random but Nokia MAC.
1698          */
1699         memcpy(wl->mac_addr, nokia_oui, 3);
1700         get_random_bytes(wl->mac_addr + 3, 3);
1701
1702         wl->state = WL1251_STATE_OFF;
1703         mutex_init(&wl->mutex);
1704
1705         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1706         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1707
1708         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1709         if (!wl->rx_descriptor) {
1710                 wl1251_error("could not allocate memory for rx descriptor");
1711                 ieee80211_free_hw(hw);
1712                 return ERR_PTR(-ENOMEM);
1713         }
1714
1715         return hw;
1716 }
1717 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1718
1719 int wl1251_free_hw(struct wl1251 *wl)
1720 {
1721         ieee80211_unregister_hw(wl->hw);
1722
1723         wl1251_debugfs_exit(wl);
1724
1725         kfree(wl->target_mem_map);
1726         kfree(wl->data_path);
1727         vfree(wl->fw);
1728         wl->fw = NULL;
1729         kfree(wl->nvs);
1730         wl->nvs = NULL;
1731
1732         kfree(wl->rx_descriptor);
1733         wl->rx_descriptor = NULL;
1734
1735         ieee80211_free_hw(wl->hw);
1736
1737         if (wl->eeprom_dump != NULL)
1738                 kfree(wl->eeprom_dump);
1739
1740         return 0;
1741 }
1742 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1743
1744 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1745 MODULE_LICENSE("GPL");
1746 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1747 MODULE_FIRMWARE(WL1251_FW_NAME);