drivers/net/wireless/wl12xx/wl1271_main.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/firmware.h>
  28 #include <linux/delay.h>
  29 #include <linux/irq.h>
  30 #include <linux/spi/spi.h>
  31 #include <linux/crc32.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/spi/wl12xx.h>
  34
  35 #include "wl1271.h"
  36 #include "wl12xx_80211.h"
  37 #include "wl1271_reg.h"
  38 #include "wl1271_spi.h"
  39 #include "wl1271_event.h"
  40 #include "wl1271_tx.h"
  41 #include "wl1271_rx.h"
  42 #include "wl1271_ps.h"
  43 #include "wl1271_init.h"
  44 #include "wl1271_debugfs.h"
  45 #include "wl1271_cmd.h"
  46 #include "wl1271_boot.h"
  47
  48 static int wl1271_plt_init(struct wl1271 *wl)
  49 {
  50         int ret;
  51
  52         ret = wl1271_acx_init_mem_config(wl);
  53         if (ret < 0)
  54                 return ret;
  55
  56         ret = wl1271_cmd_data_path(wl, wl->channel, 1);
  57         if (ret < 0)
  58                 return ret;
  59
  60         return 0;
  61 }
  62
  63 static void wl1271_disable_interrupts(struct wl1271 *wl)
  64 {
  65         disable_irq(wl->irq);
  66 }
  67
  68 static void wl1271_power_off(struct wl1271 *wl)
  69 {
  70         wl->set_power(false);
  71 }
  72
  73 static void wl1271_power_on(struct wl1271 *wl)
  74 {
  75         wl->set_power(true);
  76 }
  77
  78 static void wl1271_fw_status(struct wl1271 *wl, struct wl1271_fw_status *status)
  79 {
  80         u32 total = 0;
  81         int i;
  82
  83         /*
  84          * FIXME: Reading the FW status directly from the registers seems to
  85          * be the right thing to do, but it doesn't work.  And in the
  86          * reference driver, there is a workaround called
  87          * USE_SDIO_24M_WORKAROUND, which reads the status from memory
  88          * instead, so we do the same here.
  89          */
  90
  91         wl1271_spi_mem_read(wl, STATUS_MEM_ADDRESS, status, sizeof(*status));
  92
  93         wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
  94                      "drv_rx_counter = %d, tx_results_counter = %d)",
  95                      status->intr,
  96                      status->fw_rx_counter,
  97                      status->drv_rx_counter,
  98                      status->tx_results_counter);
  99
 100         /* update number of available TX blocks */
 101         for (i = 0; i < NUM_TX_QUEUES; i++) {
 102                 u32 cnt = status->tx_released_blks[i] - wl->tx_blocks_freed[i];
 103                 wl->tx_blocks_freed[i] = status->tx_released_blks[i];
 104                 wl->tx_blocks_available += cnt;
 105                 total += cnt;
 106         }
 107
 108         /* if more blocks are available now, schedule some tx work */
 109         if (total && !skb_queue_empty(&wl->tx_queue))
 110                 schedule_work(&wl->tx_work);
 111
 112         /* update the host-chipset time offset */
 113         wl->time_offset = jiffies_to_usecs(jiffies) - status->fw_localtime;
 114 }
 115
 116 #define WL1271_IRQ_MAX_LOOPS 10
 117 static void wl1271_irq_work(struct work_struct *work)
 118 {
 119         u32 intr, ctr = WL1271_IRQ_MAX_LOOPS;
 120         int ret;
 121         struct wl1271 *wl =
 122                 container_of(work, struct wl1271, irq_work);
 123
 124         mutex_lock(&wl->mutex);
 125
 126         wl1271_debug(DEBUG_IRQ, "IRQ work");
 127
 128         if (wl->state == WL1271_STATE_OFF)
 129                 goto out;
 130
 131         ret = wl1271_ps_elp_wakeup(wl, true);
 132         if (ret < 0)
 133                 goto out;
 134
 135         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
 136
 137         intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 138         if (!intr) {
 139                 wl1271_debug(DEBUG_IRQ, "Zero interrupt received.");
 140                 goto out_sleep;
 141         }
 142
 143         intr &= WL1271_INTR_MASK;
 144
 145         do {
 146                 wl1271_fw_status(wl, wl->fw_status);
 147
 148
 149                 if (intr & (WL1271_ACX_INTR_EVENT_A |
 150                             WL1271_ACX_INTR_EVENT_B)) {
 151                         wl1271_debug(DEBUG_IRQ,
 152                                      "WL1271_ACX_INTR_EVENT (0x%x)", intr);
 153                         if (intr & WL1271_ACX_INTR_EVENT_A)
 154                                 wl1271_event_handle(wl, 0);
 155                         else
 156                                 wl1271_event_handle(wl, 1);
 157                 }
 158
 159                 if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
 160                         wl1271_debug(DEBUG_IRQ,
 161                                      "WL1271_ACX_INTR_INIT_COMPLETE");
 162
 163                 if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
 164                         wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
 165
 166                 if (intr & WL1271_ACX_INTR_DATA) {
 167                         u8 tx_res_cnt = wl->fw_status->tx_results_counter -
 168                                 wl->tx_results_count;
 169
 170                         wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
 171
 172                         /* check for tx results */
 173                         if (tx_res_cnt)
 174                                 wl1271_tx_complete(wl, tx_res_cnt);
 175
 176                         wl1271_rx(wl, wl->fw_status);
 177                 }
 178
 179                 intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 180                 intr &= WL1271_INTR_MASK;
 181         } while (intr && --ctr);
 182
 183 out_sleep:
 184         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
 185                            WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
 186         wl1271_ps_elp_sleep(wl);
 187
 188 out:
 189         mutex_unlock(&wl->mutex);
 190 }
 191
 192 static irqreturn_t wl1271_irq(int irq, void *cookie)
 193 {
 194         struct wl1271 *wl;
 195         unsigned long flags;
 196
 197         wl1271_debug(DEBUG_IRQ, "IRQ");
 198
 199         wl = cookie;
 200
 201         /* complete the ELP completion */
 202         spin_lock_irqsave(&wl->wl_lock, flags);
 203         if (wl->elp_compl) {
 204                 complete(wl->elp_compl);
 205                 wl->elp_compl = NULL;
 206         }
 207
 208         schedule_work(&wl->irq_work);
 209         spin_unlock_irqrestore(&wl->wl_lock, flags);
 210
 211         return IRQ_HANDLED;
 212 }
 213
 214 static int wl1271_fetch_firmware(struct wl1271 *wl)
 215 {
 216         const struct firmware *fw;
 217         int ret;
 218
 219         ret = request_firmware(&fw, WL1271_FW_NAME, &wl->spi->dev);
 220
 221         if (ret < 0) {
 222                 wl1271_error("could not get firmware: %d", ret);
 223                 return ret;
 224         }
 225
 226         if (fw->size % 4) {
 227                 wl1271_error("firmware size is not multiple of 32 bits: %zu",
 228                              fw->size);
 229                 ret = -EILSEQ;
 230                 goto out;
 231         }
 232
 233         wl->fw_len = fw->size;
 234         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
 235
 236         if (!wl->fw) {
 237                 wl1271_error("could not allocate memory for the firmware");
 238                 ret = -ENOMEM;
 239                 goto out;
 240         }
 241
 242         memcpy(wl->fw, fw->data, wl->fw_len);
 243
 244         ret = 0;
 245
 246 out:
 247         release_firmware(fw);
 248
 249         return ret;
 250 }
 251
 252 static int wl1271_fetch_nvs(struct wl1271 *wl)
 253 {
 254         const struct firmware *fw;
 255         int ret;
 256
 257         ret = request_firmware(&fw, WL1271_NVS_NAME, &wl->spi->dev);
 258
 259         if (ret < 0) {
 260                 wl1271_error("could not get nvs file: %d", ret);
 261                 return ret;
 262         }
 263
 264         if (fw->size % 4) {
 265                 wl1271_error("nvs size is not multiple of 32 bits: %zu",
 266                              fw->size);
 267                 ret = -EILSEQ;
 268                 goto out;
 269         }
 270
 271         wl->nvs_len = fw->size;
 272         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
 273
 274         if (!wl->nvs) {
 275                 wl1271_error("could not allocate memory for the nvs file");
 276                 ret = -ENOMEM;
 277                 goto out;
 278         }
 279
 280         memcpy(wl->nvs, fw->data, wl->nvs_len);
 281
 282         ret = 0;
 283
 284 out:
 285         release_firmware(fw);
 286
 287         return ret;
 288 }
 289
 290 static void wl1271_fw_wakeup(struct wl1271 *wl)
 291 {
 292         u32 elp_reg;
 293
 294         elp_reg = ELPCTRL_WAKE_UP;
 295         wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 296 }
 297
 298 static int wl1271_setup(struct wl1271 *wl)
 299 {
 300         wl->fw_status = kmalloc(sizeof(*wl->fw_status), GFP_KERNEL);
 301         if (!wl->fw_status)
 302                 return -ENOMEM;
 303
 304         wl->tx_res_if = kmalloc(sizeof(*wl->tx_res_if), GFP_KERNEL);
 305         if (!wl->tx_res_if) {
 306                 kfree(wl->fw_status);
 307                 return -ENOMEM;
 308         }
 309
 310         INIT_WORK(&wl->irq_work, wl1271_irq_work);
 311         INIT_WORK(&wl->tx_work, wl1271_tx_work);
 312         return 0;
 313 }
 314
 315 static int wl1271_chip_wakeup(struct wl1271 *wl)
 316 {
 317         int ret = 0;
 318
 319         wl1271_power_on(wl);
 320         msleep(WL1271_POWER_ON_SLEEP);
 321         wl1271_spi_reset(wl);
 322         wl1271_spi_init(wl);
 323
 324         /* We don't need a real memory partition here, because we only want
 325          * to use the registers at this point. */
 326         wl1271_set_partition(wl,
 327                              0x00000000,
 328                              0x00000000,
 329                              REGISTERS_BASE,
 330                              REGISTERS_DOWN_SIZE);
 331
 332         /* ELP module wake up */
 333         wl1271_fw_wakeup(wl);
 334
 335         /* whal_FwCtrl_BootSm() */
 336
 337         /* 0. read chip id from CHIP_ID */
 338         wl->chip.id = wl1271_reg_read32(wl, CHIP_ID_B);
 339
 340         /* 1. check if chip id is valid */
 341
 342         switch (wl->chip.id) {
 343         case CHIP_ID_1271_PG10:
 344                 wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
 345                                wl->chip.id);
 346
 347                 ret = wl1271_setup(wl);
 348                 if (ret < 0)
 349                         goto out;
 350                 break;
 351         case CHIP_ID_1271_PG20:
 352                 wl1271_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
 353                              wl->chip.id);
 354
 355                 ret = wl1271_setup(wl);
 356                 if (ret < 0)
 357                         goto out;
 358                 break;
 359         default:
 360                 wl1271_error("unsupported chip id: 0x%x", wl->chip.id);
 361                 ret = -ENODEV;
 362                 goto out;
 363         }
 364
 365         if (wl->fw == NULL) {
 366                 ret = wl1271_fetch_firmware(wl);
 367                 if (ret < 0)
 368                         goto out;
 369         }
 370
 371         /* No NVS from netlink, try to get it from the filesystem */
 372         if (wl->nvs == NULL) {
 373                 ret = wl1271_fetch_nvs(wl);
 374                 if (ret < 0)
 375                         goto out;
 376         }
 377
 378 out:
 379         return ret;
 380 }
 381
 382 static void wl1271_filter_work(struct work_struct *work)
 383 {
 384         struct wl1271 *wl =
 385                 container_of(work, struct wl1271, filter_work);
 386         int ret;
 387
 388         mutex_lock(&wl->mutex);
 389
 390         if (wl->state == WL1271_STATE_OFF)
 391                 goto out;
 392
 393         ret = wl1271_ps_elp_wakeup(wl, false);
 394         if (ret < 0)
 395                 goto out;
 396
 397         /* FIXME: replace the magic numbers with proper definitions */
 398         ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 399         if (ret < 0)
 400                 goto out_sleep;
 401
 402 out_sleep:
 403         wl1271_ps_elp_sleep(wl);
 404
 405 out:
 406         mutex_unlock(&wl->mutex);
 407 }
 408
 409 int wl1271_plt_start(struct wl1271 *wl)
 410 {
 411         int ret;
 412
 413         mutex_lock(&wl->mutex);
 414
 415         wl1271_notice("power up");
 416
 417         if (wl->state != WL1271_STATE_OFF) {
 418                 wl1271_error("cannot go into PLT state because not "
 419                              "in off state: %d", wl->state);
 420                 ret = -EBUSY;
 421                 goto out;
 422         }
 423
 424         wl->state = WL1271_STATE_PLT;
 425
 426         ret = wl1271_chip_wakeup(wl);
 427         if (ret < 0)
 428                 goto out;
 429
 430         ret = wl1271_boot(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         wl1271_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
 435
 436         ret = wl1271_plt_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440 out:
 441         mutex_unlock(&wl->mutex);
 442
 443         return ret;
 444 }
 445
 446 int wl1271_plt_stop(struct wl1271 *wl)
 447 {
 448         int ret = 0;
 449
 450         mutex_lock(&wl->mutex);
 451
 452         wl1271_notice("power down");
 453
 454         if (wl->state != WL1271_STATE_PLT) {
 455                 wl1271_error("cannot power down because not in PLT "
 456                              "state: %d", wl->state);
 457                 ret = -EBUSY;
 458                 goto out;
 459         }
 460
 461         wl1271_disable_interrupts(wl);
 462         wl1271_power_off(wl);
 463
 464         wl->state = WL1271_STATE_OFF;
 465
 466 out:
 467         mutex_unlock(&wl->mutex);
 468
 469         return ret;
 470 }
 471
 472
 473 static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 474 {
 475         struct wl1271 *wl = hw->priv;
 476
 477         skb_queue_tail(&wl->tx_queue, skb);
 478
 479         /*
 480          * The chip specific setup must run before the first TX packet -
 481          * before that, the tx_work will not be initialized!
 482          */
 483
 484         schedule_work(&wl->tx_work);
 485
 486         /*
 487          * The workqueue is slow to process the tx_queue and we need stop
 488          * the queue here, otherwise the queue will get too long.
 489          */
 490         if (skb_queue_len(&wl->tx_queue) >= WL1271_TX_QUEUE_MAX_LENGTH) {
 491                 ieee80211_stop_queues(wl->hw);
 492
 493                 /*
 494                  * FIXME: this is racy, the variable is not properly
 495                  * protected. Maybe fix this by removing the stupid
 496                  * variable altogether and checking the real queue state?
 497                  */
 498                 wl->tx_queue_stopped = true;
 499         }
 500
 501         return NETDEV_TX_OK;
 502 }
 503
 504 static int wl1271_op_start(struct ieee80211_hw *hw)
 505 {
 506         struct wl1271 *wl = hw->priv;
 507         int ret = 0;
 508
 509         wl1271_debug(DEBUG_MAC80211, "mac80211 start");
 510
 511         mutex_lock(&wl->mutex);
 512
 513         if (wl->state != WL1271_STATE_OFF) {
 514                 wl1271_error("cannot start because not in off state: %d",
 515                              wl->state);
 516                 ret = -EBUSY;
 517                 goto out;
 518         }
 519
 520         ret = wl1271_chip_wakeup(wl);
 521         if (ret < 0)
 522                 goto out;
 523
 524         ret = wl1271_boot(wl);
 525         if (ret < 0)
 526                 goto out;
 527
 528         ret = wl1271_hw_init(wl);
 529         if (ret < 0)
 530                 goto out;
 531
 532         wl->state = WL1271_STATE_ON;
 533
 534         wl1271_info("firmware booted (%s)", wl->chip.fw_ver);
 535
 536 out:
 537         if (ret < 0)
 538                 wl1271_power_off(wl);
 539
 540         mutex_unlock(&wl->mutex);
 541
 542         return ret;
 543 }
 544
 545 static void wl1271_op_stop(struct ieee80211_hw *hw)
 546 {
 547         struct wl1271 *wl = hw->priv;
 548         int i;
 549
 550         wl1271_info("down");
 551
 552         wl1271_debug(DEBUG_MAC80211, "mac80211 stop");
 553
 554         mutex_lock(&wl->mutex);
 555
 556         WARN_ON(wl->state != WL1271_STATE_ON);
 557
 558         if (wl->scanning) {
 559                 mutex_unlock(&wl->mutex);
 560                 ieee80211_scan_completed(wl->hw, true);
 561                 mutex_lock(&wl->mutex);
 562                 wl->scanning = false;
 563         }
 564
 565         wl->state = WL1271_STATE_OFF;
 566
 567         wl1271_disable_interrupts(wl);
 568
 569         mutex_unlock(&wl->mutex);
 570
 571         cancel_work_sync(&wl->irq_work);
 572         cancel_work_sync(&wl->tx_work);
 573         cancel_work_sync(&wl->filter_work);
 574
 575         mutex_lock(&wl->mutex);
 576
 577         /* let's notify MAC80211 about the remaining pending TX frames */
 578         wl1271_tx_flush(wl);
 579         wl1271_power_off(wl);
 580
 581         memset(wl->bssid, 0, ETH_ALEN);
 582         memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
 583         wl->ssid_len = 0;
 584         wl->listen_int = 1;
 585         wl->bss_type = MAX_BSS_TYPE;
 586
 587         wl->rx_counter = 0;
 588         wl->elp = false;
 589         wl->psm = 0;
 590         wl->tx_queue_stopped = false;
 591         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
 592         wl->tx_blocks_available = 0;
 593         wl->tx_results_count = 0;
 594         wl->tx_packets_count = 0;
 595         wl->time_offset = 0;
 596         wl->session_counter = 0;
 597         for (i = 0; i < NUM_TX_QUEUES; i++)
 598                 wl->tx_blocks_freed[i] = 0;
 599
 600         wl1271_debugfs_reset(wl);
 601         mutex_unlock(&wl->mutex);
 602 }
 603
 604 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 605                                    struct ieee80211_if_init_conf *conf)
 606 {
 607         struct wl1271 *wl = hw->priv;
 608         int ret = 0;
 609
 610         wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 611                      conf->type, conf->mac_addr);
 612
 613         mutex_lock(&wl->mutex);
 614
 615         switch (conf->type) {
 616         case NL80211_IFTYPE_STATION:
 617                 wl->bss_type = BSS_TYPE_STA_BSS;
 618                 break;
 619         case NL80211_IFTYPE_ADHOC:
 620                 wl->bss_type = BSS_TYPE_IBSS;
 621                 break;
 622         default:
 623                 ret = -EOPNOTSUPP;
 624                 goto out;
 625         }
 626
 627         /* FIXME: what if conf->mac_addr changes? */
 628
 629 out:
 630         mutex_unlock(&wl->mutex);
 631         return ret;
 632 }
 633
 634 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
 635                                          struct ieee80211_if_init_conf *conf)
 636 {
 637         wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
 638 }
 639
 640 #if 0
 641 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
 642                                       struct ieee80211_vif *vif,
 643                                       struct ieee80211_if_conf *conf)
 644 {
 645         struct wl1271 *wl = hw->priv;
 646         struct sk_buff *beacon;
 647         DECLARE_MAC_BUF(mac);
 648         int ret;
 649
 650         wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %s",
 651                      print_mac(mac, conf->bssid));
 652         wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
 653                           conf->ssid_len);
 654
 655         mutex_lock(&wl->mutex);
 656
 657         ret = wl1271_ps_elp_wakeup(wl, false);
 658         if (ret < 0)
 659                 goto out;
 660
 661         memcpy(wl->bssid, conf->bssid, ETH_ALEN);
 662
 663         ret = wl1271_cmd_build_null_data(wl);
 664         if (ret < 0)
 665                 goto out_sleep;
 666
 667         wl->ssid_len = conf->ssid_len;
 668         if (wl->ssid_len)
 669                 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
 670
 671         if (wl->bss_type != BSS_TYPE_IBSS) {
 672                 /* FIXME: replace the magic numbers with proper definitions */
 673                 ret = wl1271_cmd_join(wl, wl->bss_type, 5, 100, 1);
 674                 if (ret < 0)
 675                         goto out_sleep;
 676         }
 677
 678         if (conf->changed & IEEE80211_IFCC_BEACON) {
 679                 beacon = ieee80211_beacon_get(hw, vif);
 680                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
 681                                               beacon->data, beacon->len);
 682
 683                 if (ret < 0) {
 684                         dev_kfree_skb(beacon);
 685                         goto out_sleep;
 686                 }
 687
 688                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
 689                                               beacon->data, beacon->len);
 690
 691                 dev_kfree_skb(beacon);
 692
 693                 if (ret < 0)
 694                         goto out_sleep;
 695
 696                 /* FIXME: replace the magic numbers with proper definitions */
 697                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 698
 699                 if (ret < 0)
 700                         goto out_sleep;
 701         }
 702
 703 out_sleep:
 704         wl1271_ps_elp_sleep(wl);
 705
 706 out:
 707         mutex_unlock(&wl->mutex);
 708
 709         return ret;
 710 }
 711 #endif
 712
 713 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
 714 {
 715         struct wl1271 *wl = hw->priv;
 716         struct ieee80211_conf *conf = &hw->conf;
 717         int channel, ret = 0;
 718
 719         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 720
 721         wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 722                      channel,
 723                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 724                      conf->power_level);
 725
 726         mutex_lock(&wl->mutex);
 727
 728         ret = wl1271_ps_elp_wakeup(wl, false);
 729         if (ret < 0)
 730                 goto out;
 731
 732         if (channel != wl->channel) {
 733                 u8 old_channel = wl->channel;
 734                 wl->channel = channel;
 735
 736                 /* FIXME: use beacon interval provided by mac80211 */
 737                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
 738                 if (ret < 0) {
 739                         wl->channel = old_channel;
 740                         goto out_sleep;
 741                 }
 742         }
 743
 744         ret = wl1271_cmd_build_null_data(wl);
 745         if (ret < 0)
 746                 goto out_sleep;
 747
 748         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 749                 wl1271_info("psm enabled");
 750
 751                 wl->psm_requested = true;
 752
 753                 /*
 754                  * We enter PSM only if we're already associated.
 755                  * If we're not, we'll enter it when joining an SSID,
 756                  * through the bss_info_changed() hook.
 757                  */
 758                 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 759         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 760                    wl->psm_requested) {
 761                 wl1271_info("psm disabled");
 762
 763                 wl->psm_requested = false;
 764
 765                 if (wl->psm)
 766                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
 767         }
 768
 769         if (conf->power_level != wl->power_level) {
 770                 ret = wl1271_acx_tx_power(wl, conf->power_level);
 771                 if (ret < 0)
 772                         goto out;
 773
 774                 wl->power_level = conf->power_level;
 775         }
 776
 777 out_sleep:
 778         wl1271_ps_elp_sleep(wl);
 779
 780 out:
 781         mutex_unlock(&wl->mutex);
 782
 783         return ret;
 784 }
 785
 786 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 787                                   FIF_ALLMULTI | \
 788                                   FIF_FCSFAIL | \
 789                                   FIF_BCN_PRBRESP_PROMISC | \
 790                                   FIF_CONTROL | \
 791                                   FIF_OTHER_BSS)
 792
 793 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
 794                                        unsigned int changed,
 795                                        unsigned int *total,u64 multicast)
 796 {
 797         struct wl1271 *wl = hw->priv;
 798
 799         wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
 800
 801         *total &= WL1271_SUPPORTED_FILTERS;
 802         changed &= WL1271_SUPPORTED_FILTERS;
 803
 804         if (changed == 0)
 805                 return;
 806
 807         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
 808         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
 809         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
 810
 811         /*
 812          * FIXME: workqueues need to be properly cancelled on stop(), for
 813          * now let's just disable changing the filter settings. They will
 814          * be updated any on config().
 815          */
 816         /* schedule_work(&wl->filter_work); */
 817 }
 818
 819 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 820                              struct ieee80211_vif *vif,
 821                              struct ieee80211_sta *sta,
 822                              struct ieee80211_key_conf *key_conf)
 823 {
 824         struct wl1271 *wl = hw->priv;
 825         const u8 *addr;
 826         int ret;
 827         u8 key_type;
 828
 829         static const u8 bcast_addr[ETH_ALEN] =
 830                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 831
 832         wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
 833
 834         addr = sta ? sta->addr : bcast_addr;
 835
 836         wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 837         wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 838         wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 839                      key_conf->alg, key_conf->keyidx,
 840                      key_conf->keylen, key_conf->flags);
 841         wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
 842
 843         if (is_zero_ether_addr(addr)) {
 844                 /* We dont support TX only encryption */
 845                 ret = -EOPNOTSUPP;
 846                 goto out;
 847         }
 848
 849         mutex_lock(&wl->mutex);
 850
 851         ret = wl1271_ps_elp_wakeup(wl, false);
 852         if (ret < 0)
 853                 goto out_unlock;
 854
 855         switch (key_conf->alg) {
 856         case ALG_WEP:
 857                 key_type = KEY_WEP;
 858
 859                 key_conf->hw_key_idx = key_conf->keyidx;
 860                 break;
 861         case ALG_TKIP:
 862                 key_type = KEY_TKIP;
 863
 864                 key_conf->hw_key_idx = key_conf->keyidx;
 865                 break;
 866         case ALG_CCMP:
 867                 key_type = KEY_AES;
 868
 869                 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 870                 break;
 871         default:
 872                 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
 873
 874                 ret = -EOPNOTSUPP;
 875                 goto out_sleep;
 876         }
 877
 878         switch (cmd) {
 879         case SET_KEY:
 880                 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
 881                                          key_conf->keyidx, key_type,
 882                                          key_conf->keylen, key_conf->key,
 883                                          addr);
 884                 if (ret < 0) {
 885                         wl1271_error("Could not add or replace key");
 886                         goto out_sleep;
 887                 }
 888                 break;
 889
 890         case DISABLE_KEY:
 891                 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
 892                                          key_conf->keyidx, key_type,
 893                                          key_conf->keylen, key_conf->key,
 894                                          addr);
 895                 if (ret < 0) {
 896                         wl1271_error("Could not remove key");
 897                         goto out_sleep;
 898                 }
 899                 break;
 900
 901         default:
 902                 wl1271_error("Unsupported key cmd 0x%x", cmd);
 903                 ret = -EOPNOTSUPP;
 904                 goto out_sleep;
 905
 906                 break;
 907         }
 908
 909 out_sleep:
 910         wl1271_ps_elp_sleep(wl);
 911
 912 out_unlock:
 913         mutex_unlock(&wl->mutex);
 914
 915 out:
 916         return ret;
 917 }
 918
 919 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
 920                              struct cfg80211_scan_request *req)
 921 {
 922         struct wl1271 *wl = hw->priv;
 923         int ret;
 924         u8 *ssid = NULL;
 925         size_t ssid_len = 0;
 926
 927         wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
 928
 929         if (req->n_ssids) {
 930                 ssid = req->ssids[0].ssid;
 931                 ssid_len = req->ssids[0].ssid_len;
 932         }
 933
 934         mutex_lock(&wl->mutex);
 935
 936         ret = wl1271_ps_elp_wakeup(wl, false);
 937         if (ret < 0)
 938                 goto out;
 939
 940         ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
 941
 942         wl1271_ps_elp_sleep(wl);
 943
 944 out:
 945         mutex_unlock(&wl->mutex);
 946
 947         return ret;
 948 }
 949
 950 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 951 {
 952         struct wl1271 *wl = hw->priv;
 953         int ret;
 954
 955         mutex_lock(&wl->mutex);
 956
 957         ret = wl1271_ps_elp_wakeup(wl, false);
 958         if (ret < 0)
 959                 goto out;
 960
 961         ret = wl1271_acx_rts_threshold(wl, (u16) value);
 962         if (ret < 0)
 963                 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
 964
 965         wl1271_ps_elp_sleep(wl);
 966
 967 out:
 968         mutex_unlock(&wl->mutex);
 969
 970         return ret;
 971 }
 972
 973 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
 974                                        struct ieee80211_vif *vif,
 975                                        struct ieee80211_bss_conf *bss_conf,
 976                                        u32 changed)
 977 {
 978         enum wl1271_cmd_ps_mode mode;
 979         struct wl1271 *wl = hw->priv;
 980         int ret;
 981
 982         wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 983
 984         mutex_lock(&wl->mutex);
 985
 986         ret = wl1271_ps_elp_wakeup(wl, false);
 987         if (ret < 0)
 988                 goto out;
 989
 990         if (changed & BSS_CHANGED_ASSOC) {
 991                 if (bss_conf->assoc) {
 992                         wl->aid = bss_conf->aid;
 993
 994                         ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
 995                         if (ret < 0)
 996                                 goto out_sleep;
 997
 998                         ret = wl1271_acx_aid(wl, wl->aid);
 999                         if (ret < 0)
1000                                 goto out_sleep;
1001
1002                         /* If we want to go in PSM but we're not there yet */
1003                         if (wl->psm_requested && !wl->psm) {
1004                                 mode = STATION_POWER_SAVE_MODE;
1005                                 ret = wl1271_ps_set_mode(wl, mode);
1006                                 if (ret < 0)
1007                                         goto out_sleep;
1008                         }
1009                 }
1010         }
1011         if (changed & BSS_CHANGED_ERP_SLOT) {
1012                 if (bss_conf->use_short_slot)
1013                         ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1014                 else
1015                         ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1016                 if (ret < 0) {
1017                         wl1271_warning("Set slot time failed %d", ret);
1018                         goto out_sleep;
1019                 }
1020         }
1021
1022         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1023                 if (bss_conf->use_short_preamble)
1024                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1025                 else
1026                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1027         }
1028
1029         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1030                 if (bss_conf->use_cts_prot)
1031                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1032                 else
1033                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1034                 if (ret < 0) {
1035                         wl1271_warning("Set ctsprotect failed %d", ret);
1036                         goto out_sleep;
1037                 }
1038         }
1039
1040 out_sleep:
1041         wl1271_ps_elp_sleep(wl);
1042
1043 out:
1044         mutex_unlock(&wl->mutex);
1045 }
1046
1047
1048 /* can't be const, mac80211 writes to this */
1049 static struct ieee80211_rate wl1271_rates[] = {
1050         { .bitrate = 10,
1051           .hw_value = 0x1,
1052           .hw_value_short = 0x1, },
1053         { .bitrate = 20,
1054           .hw_value = 0x2,
1055           .hw_value_short = 0x2,
1056           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1057         { .bitrate = 55,
1058           .hw_value = 0x4,
1059           .hw_value_short = 0x4,
1060           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1061         { .bitrate = 110,
1062           .hw_value = 0x20,
1063           .hw_value_short = 0x20,
1064           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1065         { .bitrate = 60,
1066           .hw_value = 0x8,
1067           .hw_value_short = 0x8, },
1068         { .bitrate = 90,
1069           .hw_value = 0x10,
1070           .hw_value_short = 0x10, },
1071         { .bitrate = 120,
1072           .hw_value = 0x40,
1073           .hw_value_short = 0x40, },
1074         { .bitrate = 180,
1075           .hw_value = 0x80,
1076           .hw_value_short = 0x80, },
1077         { .bitrate = 240,
1078           .hw_value = 0x200,
1079           .hw_value_short = 0x200, },
1080         { .bitrate = 360,
1081          .hw_value = 0x400,
1082          .hw_value_short = 0x400, },
1083         { .bitrate = 480,
1084           .hw_value = 0x800,
1085           .hw_value_short = 0x800, },
1086         { .bitrate = 540,
1087           .hw_value = 0x1000,
1088           .hw_value_short = 0x1000, },
1089 };
1090
1091 /* can't be const, mac80211 writes to this */
1092 static struct ieee80211_channel wl1271_channels[] = {
1093         { .hw_value = 1, .center_freq = 2412},
1094         { .hw_value = 2, .center_freq = 2417},
1095         { .hw_value = 3, .center_freq = 2422},
1096         { .hw_value = 4, .center_freq = 2427},
1097         { .hw_value = 5, .center_freq = 2432},
1098         { .hw_value = 6, .center_freq = 2437},
1099         { .hw_value = 7, .center_freq = 2442},
1100         { .hw_value = 8, .center_freq = 2447},
1101         { .hw_value = 9, .center_freq = 2452},
1102         { .hw_value = 10, .center_freq = 2457},
1103         { .hw_value = 11, .center_freq = 2462},
1104         { .hw_value = 12, .center_freq = 2467},
1105         { .hw_value = 13, .center_freq = 2472},
1106 };
1107
1108 /* can't be const, mac80211 writes to this */
1109 static struct ieee80211_supported_band wl1271_band_2ghz = {
1110         .channels = wl1271_channels,
1111         .n_channels = ARRAY_SIZE(wl1271_channels),
1112         .bitrates = wl1271_rates,
1113         .n_bitrates = ARRAY_SIZE(wl1271_rates),
1114 };
1115
1116 static const struct ieee80211_ops wl1271_ops = {
1117         .start = wl1271_op_start,
1118         .stop = wl1271_op_stop,
1119         .add_interface = wl1271_op_add_interface,
1120         .remove_interface = wl1271_op_remove_interface,
1121         .config = wl1271_op_config,
1122 /*      .config_interface = wl1271_op_config_interface, */
1123         .configure_filter = wl1271_op_configure_filter,
1124         .tx = wl1271_op_tx,
1125         .set_key = wl1271_op_set_key,
1126         .hw_scan = wl1271_op_hw_scan,
1127         .bss_info_changed = wl1271_op_bss_info_changed,
1128         .set_rts_threshold = wl1271_op_set_rts_threshold,
1129 };
1130
1131 static int wl1271_register_hw(struct wl1271 *wl)
1132 {
1133         int ret;
1134
1135         if (wl->mac80211_registered)
1136                 return 0;
1137
1138         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1139
1140         ret = ieee80211_register_hw(wl->hw);
1141         if (ret < 0) {
1142                 wl1271_error("unable to register mac80211 hw: %d", ret);
1143                 return ret;
1144         }
1145
1146         wl->mac80211_registered = true;
1147
1148         wl1271_notice("loaded");
1149
1150         return 0;
1151 }
1152
1153 static int wl1271_init_ieee80211(struct wl1271 *wl)
1154 {
1155         /*
1156          * The tx descriptor buffer and the TKIP space.
1157          *
1158          * FIXME: add correct 1271 descriptor size
1159          */
1160         wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE;
1161
1162         /* unit us */
1163         /* FIXME: find a proper value */
1164         wl->hw->channel_change_time = 10000;
1165
1166         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1167                 IEEE80211_HW_NOISE_DBM;
1168
1169         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1170         wl->hw->wiphy->max_scan_ssids = 1;
1171         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1172
1173         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1174
1175         return 0;
1176 }
1177
1178 static void wl1271_device_release(struct device *dev)
1179 {
1180
1181 }
1182
1183 static struct platform_device wl1271_device = {
1184         .name           = "wl1271",
1185         .id             = -1,
1186
1187         /* device model insists to have a release function */
1188         .dev            = {
1189                 .release = wl1271_device_release,
1190         },
1191 };
1192
1193 #define WL1271_DEFAULT_CHANNEL 0
1194 static int __devinit wl1271_probe(struct spi_device *spi)
1195 {
1196         struct wl12xx_platform_data *pdata;
1197         struct ieee80211_hw *hw;
1198         struct wl1271 *wl;
1199         int ret, i;
1200         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1201
1202         pdata = spi->dev.platform_data;
1203         if (!pdata) {
1204                 wl1271_error("no platform data");
1205                 return -ENODEV;
1206         }
1207
1208         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1209         if (!hw) {
1210                 wl1271_error("could not alloc ieee80211_hw");
1211                 return -ENOMEM;
1212         }
1213
1214         wl = hw->priv;
1215         memset(wl, 0, sizeof(*wl));
1216
1217         wl->hw = hw;
1218         dev_set_drvdata(&spi->dev, wl);
1219         wl->spi = spi;
1220
1221         skb_queue_head_init(&wl->tx_queue);
1222
1223         INIT_WORK(&wl->filter_work, wl1271_filter_work);
1224         wl->channel = WL1271_DEFAULT_CHANNEL;
1225         wl->scanning = false;
1226         wl->default_key = 0;
1227         wl->listen_int = 1;
1228         wl->rx_counter = 0;
1229         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1230         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1231         wl->elp = false;
1232         wl->psm = 0;
1233         wl->psm_requested = false;
1234         wl->tx_queue_stopped = false;
1235         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1236
1237         /* We use the default power on sleep time until we know which chip
1238          * we're using */
1239         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1240                 wl->tx_frames[i] = NULL;
1241
1242         spin_lock_init(&wl->wl_lock);
1243
1244         /*
1245          * In case our MAC address is not correctly set,
1246          * we use a random but Nokia MAC.
1247          */
1248         memcpy(wl->mac_addr, nokia_oui, 3);
1249         get_random_bytes(wl->mac_addr + 3, 3);
1250
1251         wl->state = WL1271_STATE_OFF;
1252         mutex_init(&wl->mutex);
1253
1254         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1255         if (!wl->rx_descriptor) {
1256                 wl1271_error("could not allocate memory for rx descriptor");
1257                 ret = -ENOMEM;
1258                 goto out_free;
1259         }
1260
1261         /* This is the only SPI value that we need to set here, the rest
1262          * comes from the board-peripherals file */
1263         spi->bits_per_word = 32;
1264
1265         ret = spi_setup(spi);
1266         if (ret < 0) {
1267                 wl1271_error("spi_setup failed");
1268                 goto out_free;
1269         }
1270
1271         wl->set_power = pdata->set_power;
1272         if (!wl->set_power) {
1273                 wl1271_error("set power function missing in platform data");
1274                 ret = -ENODEV;
1275                 goto out_free;
1276         }
1277
1278         wl->irq = spi->irq;
1279         if (wl->irq < 0) {
1280                 wl1271_error("irq missing in platform data");
1281                 ret = -ENODEV;
1282                 goto out_free;
1283         }
1284
1285         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1286         if (ret < 0) {
1287                 wl1271_error("request_irq() failed: %d", ret);
1288                 goto out_free;
1289         }
1290
1291         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1292
1293         disable_irq(wl->irq);
1294
1295         ret = platform_device_register(&wl1271_device);
1296         if (ret) {
1297                 wl1271_error("couldn't register platform device");
1298                 goto out_irq;
1299         }
1300         dev_set_drvdata(&wl1271_device.dev, wl);
1301
1302         ret = wl1271_init_ieee80211(wl);
1303         if (ret)
1304                 goto out_platform;
1305
1306         ret = wl1271_register_hw(wl);
1307         if (ret)
1308                 goto out_platform;
1309
1310         wl1271_debugfs_init(wl);
1311
1312         wl1271_notice("initialized");
1313
1314         return 0;
1315
1316  out_platform:
1317         platform_device_unregister(&wl1271_device);
1318
1319  out_irq:
1320         free_irq(wl->irq, wl);
1321
1322  out_free:
1323         kfree(wl->rx_descriptor);
1324         wl->rx_descriptor = NULL;
1325
1326         ieee80211_free_hw(hw);
1327
1328         return ret;
1329 }
1330
1331 static int __devexit wl1271_remove(struct spi_device *spi)
1332 {
1333         struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1334
1335         ieee80211_unregister_hw(wl->hw);
1336
1337         wl1271_debugfs_exit(wl);
1338         platform_device_unregister(&wl1271_device);
1339         free_irq(wl->irq, wl);
1340         kfree(wl->target_mem_map);
1341         kfree(wl->fw);
1342         wl->fw = NULL;
1343         kfree(wl->nvs);
1344         wl->nvs = NULL;
1345
1346         kfree(wl->rx_descriptor);
1347         wl->rx_descriptor = NULL;
1348
1349         kfree(wl->fw_status);
1350         kfree(wl->tx_res_if);
1351
1352         ieee80211_free_hw(wl->hw);
1353
1354         return 0;
1355 }
1356
1357
1358 static struct spi_driver wl1271_spi_driver = {
1359         .driver = {
1360                 .name           = "wl1271",
1361                 .bus            = &spi_bus_type,
1362                 .owner          = THIS_MODULE,
1363         },
1364
1365         .probe          = wl1271_probe,
1366         .remove         = __devexit_p(wl1271_remove),
1367 };
1368
1369 static int __init wl1271_init(void)
1370 {
1371         int ret;
1372
1373         ret = spi_register_driver(&wl1271_spi_driver);
1374         if (ret < 0) {
1375                 wl1271_error("failed to register spi driver: %d", ret);
1376                 goto out;
1377         }
1378
1379 out:
1380         return ret;
1381 }
1382
1383 static void __exit wl1271_exit(void)
1384 {
1385         spi_unregister_driver(&wl1271_spi_driver);
1386
1387         wl1271_notice("unloaded");
1388 }
1389
1390 module_init(wl1271_init);
1391 module_exit(wl1271_exit);
1392
1393 MODULE_LICENSE("GPL");
1394 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");