Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
[linux-2.6.git] / drivers / net / wireless / wl1251 / main.c
1 /*
2  * This file is part of wl1251
3  *
4  * Copyright (C) 2008-2009 Nokia Corporation
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * version 2 as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18  * 02110-1301 USA
19  *
20  */
21
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
24 #include <linux/firmware.h>
25 #include <linux/delay.h>
26 #include <linux/irq.h>
27 #include <linux/crc32.h>
28 #include <linux/etherdevice.h>
29 #include <linux/vmalloc.h>
30 #include <linux/slab.h>
31
32 #include "wl1251.h"
33 #include "wl12xx_80211.h"
34 #include "reg.h"
35 #include "io.h"
36 #include "cmd.h"
37 #include "event.h"
38 #include "tx.h"
39 #include "rx.h"
40 #include "ps.h"
41 #include "init.h"
42 #include "debugfs.h"
43 #include "boot.h"
44
45 void wl1251_enable_interrupts(struct wl1251 *wl)
46 {
47         wl->if_ops->enable_irq(wl);
48 }
49
50 void wl1251_disable_interrupts(struct wl1251 *wl)
51 {
52         wl->if_ops->disable_irq(wl);
53 }
54
55 static int wl1251_power_off(struct wl1251 *wl)
56 {
57         return wl->if_ops->power(wl, false);
58 }
59
60 static int wl1251_power_on(struct wl1251 *wl)
61 {
62         return wl->if_ops->power(wl, true);
63 }
64
65 static int wl1251_fetch_firmware(struct wl1251 *wl)
66 {
67         const struct firmware *fw;
68         struct device *dev = wiphy_dev(wl->hw->wiphy);
69         int ret;
70
71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
72
73         if (ret < 0) {
74                 wl1251_error("could not get firmware: %d", ret);
75                 return ret;
76         }
77
78         if (fw->size % 4) {
79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
80                              fw->size);
81                 ret = -EILSEQ;
82                 goto out;
83         }
84
85         wl->fw_len = fw->size;
86         wl->fw = vmalloc(wl->fw_len);
87
88         if (!wl->fw) {
89                 wl1251_error("could not allocate memory for the firmware");
90                 ret = -ENOMEM;
91                 goto out;
92         }
93
94         memcpy(wl->fw, fw->data, wl->fw_len);
95
96         ret = 0;
97
98 out:
99         release_firmware(fw);
100
101         return ret;
102 }
103
104 static int wl1251_fetch_nvs(struct wl1251 *wl)
105 {
106         const struct firmware *fw;
107         struct device *dev = wiphy_dev(wl->hw->wiphy);
108         int ret;
109
110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
111
112         if (ret < 0) {
113                 wl1251_error("could not get nvs file: %d", ret);
114                 return ret;
115         }
116
117         if (fw->size % 4) {
118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
119                              fw->size);
120                 ret = -EILSEQ;
121                 goto out;
122         }
123
124         wl->nvs_len = fw->size;
125         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
126
127         if (!wl->nvs) {
128                 wl1251_error("could not allocate memory for the nvs file");
129                 ret = -ENOMEM;
130                 goto out;
131         }
132
133         ret = 0;
134
135 out:
136         release_firmware(fw);
137
138         return ret;
139 }
140
141 static void wl1251_fw_wakeup(struct wl1251 *wl)
142 {
143         u32 elp_reg;
144
145         elp_reg = ELPCTRL_WAKE_UP;
146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
148
149         if (!(elp_reg & ELPCTRL_WLAN_READY))
150                 wl1251_warning("WLAN not ready");
151 }
152
153 static int wl1251_chip_wakeup(struct wl1251 *wl)
154 {
155         int ret;
156
157         ret = wl1251_power_on(wl);
158         if (ret < 0)
159                 return ret;
160
161         msleep(WL1251_POWER_ON_SLEEP);
162         wl->if_ops->reset(wl);
163
164         /* We don't need a real memory partition here, because we only want
165          * to use the registers at this point. */
166         wl1251_set_partition(wl,
167                              0x00000000,
168                              0x00000000,
169                              REGISTERS_BASE,
170                              REGISTERS_DOWN_SIZE);
171
172         /* ELP module wake up */
173         wl1251_fw_wakeup(wl);
174
175         /* whal_FwCtrl_BootSm() */
176
177         /* 0. read chip id from CHIP_ID */
178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
179
180         /* 1. check if chip id is valid */
181
182         switch (wl->chip_id) {
183         case CHIP_ID_1251_PG12:
184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
185                              wl->chip_id);
186                 break;
187         case CHIP_ID_1251_PG11:
188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
189                              wl->chip_id);
190                 break;
191         case CHIP_ID_1251_PG10:
192         default:
193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
194                 ret = -ENODEV;
195                 goto out;
196         }
197
198         if (wl->fw == NULL) {
199                 ret = wl1251_fetch_firmware(wl);
200                 if (ret < 0)
201                         goto out;
202         }
203
204         if (wl->nvs == NULL && !wl->use_eeprom) {
205                 /* No NVS from netlink, try to get it from the filesystem */
206                 ret = wl1251_fetch_nvs(wl);
207                 if (ret < 0)
208                         goto out;
209         }
210
211 out:
212         return ret;
213 }
214
215 #define WL1251_IRQ_LOOP_COUNT 10
216 static void wl1251_irq_work(struct work_struct *work)
217 {
218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
219         struct wl1251 *wl =
220                 container_of(work, struct wl1251, irq_work);
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                 if (--ctr == 0)
312                         break;
313
314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
315         } while (intr);
316
317 out_sleep:
318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
319         wl1251_ps_elp_sleep(wl);
320
321 out:
322         mutex_unlock(&wl->mutex);
323 }
324
325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
326                        u16 beacon_interval, u8 dtim_period)
327 {
328         int ret;
329
330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
332                                      wl->tx_mgmt_frm_rate,
333                                      wl->tx_mgmt_frm_mod);
334         if (ret < 0)
335                 goto out;
336
337
338         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
339                               dtim_period);
340         if (ret < 0)
341                 goto out;
342
343         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
344         if (ret < 0)
345                 wl1251_warning("join timeout");
346
347 out:
348         return ret;
349 }
350
351 static void wl1251_filter_work(struct work_struct *work)
352 {
353         struct wl1251 *wl =
354                 container_of(work, struct wl1251, filter_work);
355         int ret;
356
357         mutex_lock(&wl->mutex);
358
359         if (wl->state == WL1251_STATE_OFF)
360                 goto out;
361
362         ret = wl1251_ps_elp_wakeup(wl);
363         if (ret < 0)
364                 goto out;
365
366         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
367                           wl->dtim_period);
368         if (ret < 0)
369                 goto out_sleep;
370
371 out_sleep:
372         wl1251_ps_elp_sleep(wl);
373
374 out:
375         mutex_unlock(&wl->mutex);
376 }
377
378 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
379 {
380         struct wl1251 *wl = hw->priv;
381         unsigned long flags;
382
383         skb_queue_tail(&wl->tx_queue, skb);
384
385         /*
386          * The chip specific setup must run before the first TX packet -
387          * before that, the tx_work will not be initialized!
388          */
389
390         ieee80211_queue_work(wl->hw, &wl->tx_work);
391
392         /*
393          * The workqueue is slow to process the tx_queue and we need stop
394          * the queue here, otherwise the queue will get too long.
395          */
396         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
397                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
398
399                 spin_lock_irqsave(&wl->wl_lock, flags);
400                 ieee80211_stop_queues(wl->hw);
401                 wl->tx_queue_stopped = true;
402                 spin_unlock_irqrestore(&wl->wl_lock, flags);
403         }
404
405         return NETDEV_TX_OK;
406 }
407
408 static int wl1251_op_start(struct ieee80211_hw *hw)
409 {
410         struct wl1251 *wl = hw->priv;
411         struct wiphy *wiphy = hw->wiphy;
412         int ret = 0;
413
414         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
415
416         mutex_lock(&wl->mutex);
417
418         if (wl->state != WL1251_STATE_OFF) {
419                 wl1251_error("cannot start because not in off state: %d",
420                              wl->state);
421                 ret = -EBUSY;
422                 goto out;
423         }
424
425         ret = wl1251_chip_wakeup(wl);
426         if (ret < 0)
427                 goto out;
428
429         ret = wl1251_boot(wl);
430         if (ret < 0)
431                 goto out;
432
433         ret = wl1251_hw_init(wl);
434         if (ret < 0)
435                 goto out;
436
437         ret = wl1251_acx_station_id(wl);
438         if (ret < 0)
439                 goto out;
440
441         wl->state = WL1251_STATE_ON;
442
443         wl1251_info("firmware booted (%s)", wl->fw_ver);
444
445         /* update hw/fw version info in wiphy struct */
446         wiphy->hw_version = wl->chip_id;
447         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
448
449 out:
450         if (ret < 0)
451                 wl1251_power_off(wl);
452
453         mutex_unlock(&wl->mutex);
454
455         return ret;
456 }
457
458 static void wl1251_op_stop(struct ieee80211_hw *hw)
459 {
460         struct wl1251 *wl = hw->priv;
461
462         wl1251_info("down");
463
464         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
465
466         mutex_lock(&wl->mutex);
467
468         WARN_ON(wl->state != WL1251_STATE_ON);
469
470         if (wl->scanning) {
471                 ieee80211_scan_completed(wl->hw, true);
472                 wl->scanning = false;
473         }
474
475         wl->state = WL1251_STATE_OFF;
476
477         wl1251_disable_interrupts(wl);
478
479         mutex_unlock(&wl->mutex);
480
481         cancel_work_sync(&wl->irq_work);
482         cancel_work_sync(&wl->tx_work);
483         cancel_work_sync(&wl->filter_work);
484
485         mutex_lock(&wl->mutex);
486
487         /* let's notify MAC80211 about the remaining pending TX frames */
488         wl1251_tx_flush(wl);
489         wl1251_power_off(wl);
490
491         memset(wl->bssid, 0, ETH_ALEN);
492         wl->listen_int = 1;
493         wl->bss_type = MAX_BSS_TYPE;
494
495         wl->data_in_count = 0;
496         wl->rx_counter = 0;
497         wl->rx_handled = 0;
498         wl->rx_current_buffer = 0;
499         wl->rx_last_id = 0;
500         wl->next_tx_complete = 0;
501         wl->elp = false;
502         wl->psm = 0;
503         wl->tx_queue_stopped = false;
504         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
505         wl->rssi_thold = 0;
506         wl->channel = WL1251_DEFAULT_CHANNEL;
507
508         wl1251_debugfs_reset(wl);
509
510         mutex_unlock(&wl->mutex);
511 }
512
513 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
514                                    struct ieee80211_vif *vif)
515 {
516         struct wl1251 *wl = hw->priv;
517         int ret = 0;
518
519         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
520                      vif->type, vif->addr);
521
522         mutex_lock(&wl->mutex);
523         if (wl->vif) {
524                 ret = -EBUSY;
525                 goto out;
526         }
527
528         wl->vif = vif;
529
530         switch (vif->type) {
531         case NL80211_IFTYPE_STATION:
532                 wl->bss_type = BSS_TYPE_STA_BSS;
533                 break;
534         case NL80211_IFTYPE_ADHOC:
535                 wl->bss_type = BSS_TYPE_IBSS;
536                 break;
537         default:
538                 ret = -EOPNOTSUPP;
539                 goto out;
540         }
541
542         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
543                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
544                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
545                 ret = wl1251_acx_station_id(wl);
546                 if (ret < 0)
547                         goto out;
548         }
549
550 out:
551         mutex_unlock(&wl->mutex);
552         return ret;
553 }
554
555 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
556                                          struct ieee80211_vif *vif)
557 {
558         struct wl1251 *wl = hw->priv;
559
560         mutex_lock(&wl->mutex);
561         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
562         wl->vif = NULL;
563         mutex_unlock(&wl->mutex);
564 }
565
566 static int wl1251_build_qos_null_data(struct wl1251 *wl)
567 {
568         struct ieee80211_qos_hdr template;
569
570         memset(&template, 0, sizeof(template));
571
572         memcpy(template.addr1, wl->bssid, ETH_ALEN);
573         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
574         memcpy(template.addr3, wl->bssid, ETH_ALEN);
575
576         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
577                                              IEEE80211_STYPE_QOS_NULLFUNC |
578                                              IEEE80211_FCTL_TODS);
579
580         /* FIXME: not sure what priority to use here */
581         template.qos_ctrl = cpu_to_le16(0);
582
583         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
584                                        sizeof(template));
585 }
586
587 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
588 {
589         struct wl1251 *wl = hw->priv;
590         struct ieee80211_conf *conf = &hw->conf;
591         int channel, ret = 0;
592
593         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
594
595         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
596                      channel,
597                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
598                      conf->power_level);
599
600         mutex_lock(&wl->mutex);
601
602         ret = wl1251_ps_elp_wakeup(wl);
603         if (ret < 0)
604                 goto out;
605
606         if (channel != wl->channel) {
607                 wl->channel = channel;
608
609                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
610                                   wl->beacon_int, wl->dtim_period);
611                 if (ret < 0)
612                         goto out_sleep;
613         }
614
615         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
616                 wl1251_debug(DEBUG_PSM, "psm enabled");
617
618                 wl->psm_requested = true;
619
620                 wl->dtim_period = conf->ps_dtim_period;
621
622                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
623                                                   wl->dtim_period);
624
625                 /*
626                  * mac80211 enables PSM only if we're already associated.
627                  */
628                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
629                 if (ret < 0)
630                         goto out_sleep;
631         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
632                    wl->psm_requested) {
633                 wl1251_debug(DEBUG_PSM, "psm disabled");
634
635                 wl->psm_requested = false;
636
637                 if (wl->psm) {
638                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
639                         if (ret < 0)
640                                 goto out_sleep;
641                 }
642         }
643
644         if (conf->power_level != wl->power_level) {
645                 ret = wl1251_acx_tx_power(wl, conf->power_level);
646                 if (ret < 0)
647                         goto out_sleep;
648
649                 wl->power_level = conf->power_level;
650         }
651
652 out_sleep:
653         wl1251_ps_elp_sleep(wl);
654
655 out:
656         mutex_unlock(&wl->mutex);
657
658         return ret;
659 }
660
661 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
662                                   FIF_ALLMULTI | \
663                                   FIF_FCSFAIL | \
664                                   FIF_BCN_PRBRESP_PROMISC | \
665                                   FIF_CONTROL | \
666                                   FIF_OTHER_BSS)
667
668 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
669                                        unsigned int changed,
670                                        unsigned int *total,u64 multicast)
671 {
672         struct wl1251 *wl = hw->priv;
673
674         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
675
676         *total &= WL1251_SUPPORTED_FILTERS;
677         changed &= WL1251_SUPPORTED_FILTERS;
678
679         if (changed == 0)
680                 /* no filters which we support changed */
681                 return;
682
683         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
684
685         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
686         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
687
688         if (*total & FIF_PROMISC_IN_BSS) {
689                 wl->rx_config |= CFG_BSSID_FILTER_EN;
690                 wl->rx_config |= CFG_RX_ALL_GOOD;
691         }
692         if (*total & FIF_ALLMULTI)
693                 /*
694                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
695                  * all multicast frames
696                  */
697                 wl->rx_config &= ~CFG_MC_FILTER_EN;
698         if (*total & FIF_FCSFAIL)
699                 wl->rx_filter |= CFG_RX_FCS_ERROR;
700         if (*total & FIF_BCN_PRBRESP_PROMISC) {
701                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
702                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
703         }
704         if (*total & FIF_CONTROL)
705                 wl->rx_filter |= CFG_RX_CTL_EN;
706         if (*total & FIF_OTHER_BSS)
707                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
708
709         /*
710          * FIXME: workqueues need to be properly cancelled on stop(), for
711          * now let's just disable changing the filter settings. They will
712          * be updated any on config().
713          */
714         /* schedule_work(&wl->filter_work); */
715 }
716
717 /* HW encryption */
718 static int wl1251_set_key_type(struct wl1251 *wl,
719                                struct wl1251_cmd_set_keys *key,
720                                enum set_key_cmd cmd,
721                                struct ieee80211_key_conf *mac80211_key,
722                                const u8 *addr)
723 {
724         switch (mac80211_key->cipher) {
725         case WLAN_CIPHER_SUITE_WEP40:
726         case WLAN_CIPHER_SUITE_WEP104:
727                 if (is_broadcast_ether_addr(addr))
728                         key->key_type = KEY_WEP_DEFAULT;
729                 else
730                         key->key_type = KEY_WEP_ADDR;
731
732                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
733                 break;
734         case WLAN_CIPHER_SUITE_TKIP:
735                 if (is_broadcast_ether_addr(addr))
736                         key->key_type = KEY_TKIP_MIC_GROUP;
737                 else
738                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
739
740                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
741                 break;
742         case WLAN_CIPHER_SUITE_CCMP:
743                 if (is_broadcast_ether_addr(addr))
744                         key->key_type = KEY_AES_GROUP;
745                 else
746                         key->key_type = KEY_AES_PAIRWISE;
747                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
748                 break;
749         default:
750                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
751                 return -EOPNOTSUPP;
752         }
753
754         return 0;
755 }
756
757 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
758                              struct ieee80211_vif *vif,
759                              struct ieee80211_sta *sta,
760                              struct ieee80211_key_conf *key)
761 {
762         struct wl1251 *wl = hw->priv;
763         struct wl1251_cmd_set_keys *wl_cmd;
764         const u8 *addr;
765         int ret;
766
767         static const u8 bcast_addr[ETH_ALEN] =
768                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
769
770         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
771
772         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
773         if (!wl_cmd) {
774                 ret = -ENOMEM;
775                 goto out;
776         }
777
778         addr = sta ? sta->addr : bcast_addr;
779
780         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
781         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
782         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
783                      key->cipher, key->keyidx, key->keylen, key->flags);
784         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
785
786         if (is_zero_ether_addr(addr)) {
787                 /* We dont support TX only encryption */
788                 ret = -EOPNOTSUPP;
789                 goto out;
790         }
791
792         mutex_lock(&wl->mutex);
793
794         ret = wl1251_ps_elp_wakeup(wl);
795         if (ret < 0)
796                 goto out_unlock;
797
798         switch (cmd) {
799         case SET_KEY:
800                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
801                 break;
802         case DISABLE_KEY:
803                 wl_cmd->key_action = KEY_REMOVE;
804                 break;
805         default:
806                 wl1251_error("Unsupported key cmd 0x%x", cmd);
807                 break;
808         }
809
810         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
811         if (ret < 0) {
812                 wl1251_error("Set KEY type failed");
813                 goto out_sleep;
814         }
815
816         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
817                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
818
819         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
820             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
821                 /*
822                  * We get the key in the following form:
823                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
824                  * but the target is expecting:
825                  * TKIP - RX MIC - TX MIC
826                  */
827                 memcpy(wl_cmd->key, key->key, 16);
828                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
829                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
830
831         } else {
832                 memcpy(wl_cmd->key, key->key, key->keylen);
833         }
834         wl_cmd->key_size = key->keylen;
835
836         wl_cmd->id = key->keyidx;
837         wl_cmd->ssid_profile = 0;
838
839         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
840
841         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
842         if (ret < 0) {
843                 wl1251_warning("could not set keys");
844                 goto out_sleep;
845         }
846
847 out_sleep:
848         wl1251_ps_elp_sleep(wl);
849
850 out_unlock:
851         mutex_unlock(&wl->mutex);
852
853 out:
854         kfree(wl_cmd);
855
856         return ret;
857 }
858
859 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
860                              struct ieee80211_vif *vif,
861                              struct cfg80211_scan_request *req)
862 {
863         struct wl1251 *wl = hw->priv;
864         struct sk_buff *skb;
865         size_t ssid_len = 0;
866         u8 *ssid = NULL;
867         int ret;
868
869         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
870
871         if (req->n_ssids) {
872                 ssid = req->ssids[0].ssid;
873                 ssid_len = req->ssids[0].ssid_len;
874         }
875
876         mutex_lock(&wl->mutex);
877
878         if (wl->scanning) {
879                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
880                 ret = -EINVAL;
881                 goto out;
882         }
883
884         ret = wl1251_ps_elp_wakeup(wl);
885         if (ret < 0)
886                 goto out;
887
888         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
889                                      req->ie, req->ie_len);
890         if (!skb) {
891                 ret = -ENOMEM;
892                 goto out;
893         }
894
895         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
896                                       skb->len);
897         dev_kfree_skb(skb);
898         if (ret < 0)
899                 goto out_sleep;
900
901         ret = wl1251_cmd_trigger_scan_to(wl, 0);
902         if (ret < 0)
903                 goto out_sleep;
904
905         wl->scanning = true;
906
907         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
908                               req->n_channels, WL1251_SCAN_NUM_PROBES);
909         if (ret < 0) {
910                 wl->scanning = false;
911                 goto out_sleep;
912         }
913
914 out_sleep:
915         wl1251_ps_elp_sleep(wl);
916
917 out:
918         mutex_unlock(&wl->mutex);
919
920         return ret;
921 }
922
923 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
924 {
925         struct wl1251 *wl = hw->priv;
926         int ret;
927
928         mutex_lock(&wl->mutex);
929
930         ret = wl1251_ps_elp_wakeup(wl);
931         if (ret < 0)
932                 goto out;
933
934         ret = wl1251_acx_rts_threshold(wl, (u16) value);
935         if (ret < 0)
936                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
937
938         wl1251_ps_elp_sleep(wl);
939
940 out:
941         mutex_unlock(&wl->mutex);
942
943         return ret;
944 }
945
946 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
947                                        struct ieee80211_vif *vif,
948                                        struct ieee80211_bss_conf *bss_conf,
949                                        u32 changed)
950 {
951         struct wl1251 *wl = hw->priv;
952         struct sk_buff *beacon, *skb;
953         int ret;
954
955         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
956
957         mutex_lock(&wl->mutex);
958
959         ret = wl1251_ps_elp_wakeup(wl);
960         if (ret < 0)
961                 goto out;
962
963         if (changed & BSS_CHANGED_CQM) {
964                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
965                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
966                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
967                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
968                 if (ret < 0)
969                         goto out;
970                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
971         }
972
973         if (changed & BSS_CHANGED_BSSID) {
974                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
975
976                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
977                 if (!skb)
978                         goto out_sleep;
979
980                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
981                                               skb->data, skb->len);
982                 dev_kfree_skb(skb);
983                 if (ret < 0)
984                         goto out_sleep;
985
986                 ret = wl1251_build_qos_null_data(wl);
987                 if (ret < 0)
988                         goto out;
989
990                 if (wl->bss_type != BSS_TYPE_IBSS) {
991                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
992                                           wl->beacon_int, wl->dtim_period);
993                         if (ret < 0)
994                                 goto out_sleep;
995                 }
996         }
997
998         if (changed & BSS_CHANGED_ASSOC) {
999                 if (bss_conf->assoc) {
1000                         wl->beacon_int = bss_conf->beacon_int;
1001
1002                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1003                         if (!skb)
1004                                 goto out_sleep;
1005
1006                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1007                                                       skb->data,
1008                                                       skb->len);
1009                         dev_kfree_skb(skb);
1010                         if (ret < 0)
1011                                 goto out_sleep;
1012
1013                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1014                         if (ret < 0)
1015                                 goto out_sleep;
1016                 } else {
1017                         /* use defaults when not associated */
1018                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1019                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1020                 }
1021         }
1022         if (changed & BSS_CHANGED_ERP_SLOT) {
1023                 if (bss_conf->use_short_slot)
1024                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1025                 else
1026                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1027                 if (ret < 0) {
1028                         wl1251_warning("Set slot time failed %d", ret);
1029                         goto out_sleep;
1030                 }
1031         }
1032
1033         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1034                 if (bss_conf->use_short_preamble)
1035                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1036                 else
1037                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1038         }
1039
1040         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1041                 if (bss_conf->use_cts_prot)
1042                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1043                 else
1044                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1045                 if (ret < 0) {
1046                         wl1251_warning("Set ctsprotect failed %d", ret);
1047                         goto out_sleep;
1048                 }
1049         }
1050
1051         if (changed & BSS_CHANGED_BEACON) {
1052                 beacon = ieee80211_beacon_get(hw, vif);
1053                 if (!beacon)
1054                         goto out_sleep;
1055
1056                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1057                                               beacon->len);
1058
1059                 if (ret < 0) {
1060                         dev_kfree_skb(beacon);
1061                         goto out_sleep;
1062                 }
1063
1064                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1065                                               beacon->len);
1066
1067                 dev_kfree_skb(beacon);
1068
1069                 if (ret < 0)
1070                         goto out_sleep;
1071
1072                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1073                                   wl->channel, wl->dtim_period);
1074
1075                 if (ret < 0)
1076                         goto out_sleep;
1077         }
1078
1079 out_sleep:
1080         wl1251_ps_elp_sleep(wl);
1081
1082 out:
1083         mutex_unlock(&wl->mutex);
1084 }
1085
1086
1087 /* can't be const, mac80211 writes to this */
1088 static struct ieee80211_rate wl1251_rates[] = {
1089         { .bitrate = 10,
1090           .hw_value = 0x1,
1091           .hw_value_short = 0x1, },
1092         { .bitrate = 20,
1093           .hw_value = 0x2,
1094           .hw_value_short = 0x2,
1095           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1096         { .bitrate = 55,
1097           .hw_value = 0x4,
1098           .hw_value_short = 0x4,
1099           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1100         { .bitrate = 110,
1101           .hw_value = 0x20,
1102           .hw_value_short = 0x20,
1103           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1104         { .bitrate = 60,
1105           .hw_value = 0x8,
1106           .hw_value_short = 0x8, },
1107         { .bitrate = 90,
1108           .hw_value = 0x10,
1109           .hw_value_short = 0x10, },
1110         { .bitrate = 120,
1111           .hw_value = 0x40,
1112           .hw_value_short = 0x40, },
1113         { .bitrate = 180,
1114           .hw_value = 0x80,
1115           .hw_value_short = 0x80, },
1116         { .bitrate = 240,
1117           .hw_value = 0x200,
1118           .hw_value_short = 0x200, },
1119         { .bitrate = 360,
1120          .hw_value = 0x400,
1121          .hw_value_short = 0x400, },
1122         { .bitrate = 480,
1123           .hw_value = 0x800,
1124           .hw_value_short = 0x800, },
1125         { .bitrate = 540,
1126           .hw_value = 0x1000,
1127           .hw_value_short = 0x1000, },
1128 };
1129
1130 /* can't be const, mac80211 writes to this */
1131 static struct ieee80211_channel wl1251_channels[] = {
1132         { .hw_value = 1, .center_freq = 2412},
1133         { .hw_value = 2, .center_freq = 2417},
1134         { .hw_value = 3, .center_freq = 2422},
1135         { .hw_value = 4, .center_freq = 2427},
1136         { .hw_value = 5, .center_freq = 2432},
1137         { .hw_value = 6, .center_freq = 2437},
1138         { .hw_value = 7, .center_freq = 2442},
1139         { .hw_value = 8, .center_freq = 2447},
1140         { .hw_value = 9, .center_freq = 2452},
1141         { .hw_value = 10, .center_freq = 2457},
1142         { .hw_value = 11, .center_freq = 2462},
1143         { .hw_value = 12, .center_freq = 2467},
1144         { .hw_value = 13, .center_freq = 2472},
1145 };
1146
1147 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1148                              const struct ieee80211_tx_queue_params *params)
1149 {
1150         enum wl1251_acx_ps_scheme ps_scheme;
1151         struct wl1251 *wl = hw->priv;
1152         int ret;
1153
1154         mutex_lock(&wl->mutex);
1155
1156         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1157
1158         ret = wl1251_ps_elp_wakeup(wl);
1159         if (ret < 0)
1160                 goto out;
1161
1162         /* mac80211 uses units of 32 usec */
1163         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1164                                 params->cw_min, params->cw_max,
1165                                 params->aifs, params->txop * 32);
1166         if (ret < 0)
1167                 goto out_sleep;
1168
1169         if (params->uapsd)
1170                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1171         else
1172                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1173
1174         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1175                                  CHANNEL_TYPE_EDCF,
1176                                  wl1251_tx_get_queue(queue), ps_scheme,
1177                                  WL1251_ACX_ACK_POLICY_LEGACY);
1178         if (ret < 0)
1179                 goto out_sleep;
1180
1181 out_sleep:
1182         wl1251_ps_elp_sleep(wl);
1183
1184 out:
1185         mutex_unlock(&wl->mutex);
1186
1187         return ret;
1188 }
1189
1190 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1191                                 struct survey_info *survey)
1192 {
1193         struct wl1251 *wl = hw->priv;
1194         struct ieee80211_conf *conf = &hw->conf;
1195  
1196         if (idx != 0)
1197                 return -ENOENT;
1198  
1199         survey->channel = conf->channel;
1200         survey->filled = SURVEY_INFO_NOISE_DBM;
1201         survey->noise = wl->noise;
1202  
1203         return 0;
1204 }
1205
1206 /* can't be const, mac80211 writes to this */
1207 static struct ieee80211_supported_band wl1251_band_2ghz = {
1208         .channels = wl1251_channels,
1209         .n_channels = ARRAY_SIZE(wl1251_channels),
1210         .bitrates = wl1251_rates,
1211         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1212 };
1213
1214 static const struct ieee80211_ops wl1251_ops = {
1215         .start = wl1251_op_start,
1216         .stop = wl1251_op_stop,
1217         .add_interface = wl1251_op_add_interface,
1218         .remove_interface = wl1251_op_remove_interface,
1219         .config = wl1251_op_config,
1220         .configure_filter = wl1251_op_configure_filter,
1221         .tx = wl1251_op_tx,
1222         .set_key = wl1251_op_set_key,
1223         .hw_scan = wl1251_op_hw_scan,
1224         .bss_info_changed = wl1251_op_bss_info_changed,
1225         .set_rts_threshold = wl1251_op_set_rts_threshold,
1226         .conf_tx = wl1251_op_conf_tx,
1227         .get_survey = wl1251_op_get_survey,
1228 };
1229
1230 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1231 {
1232         unsigned long timeout;
1233
1234         wl1251_reg_write32(wl, EE_ADDR, offset);
1235         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1236
1237         /* EE_CTL_READ clears when data is ready */
1238         timeout = jiffies + msecs_to_jiffies(100);
1239         while (1) {
1240                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1241                         break;
1242
1243                 if (time_after(jiffies, timeout))
1244                         return -ETIMEDOUT;
1245
1246                 msleep(1);
1247         }
1248
1249         *data = wl1251_reg_read32(wl, EE_DATA);
1250         return 0;
1251 }
1252
1253 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1254                               u8 *data, size_t len)
1255 {
1256         size_t i;
1257         int ret;
1258
1259         wl1251_reg_write32(wl, EE_START, 0);
1260
1261         for (i = 0; i < len; i++) {
1262                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1263                 if (ret < 0)
1264                         return ret;
1265         }
1266
1267         return 0;
1268 }
1269
1270 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1271 {
1272         u8 mac[ETH_ALEN];
1273         int i, ret;
1274
1275         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1276
1277         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1278         if (ret < 0) {
1279                 wl1251_warning("failed to read MAC address from EEPROM");
1280                 return ret;
1281         }
1282
1283         /* MAC is stored in reverse order */
1284         for (i = 0; i < ETH_ALEN; i++)
1285                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1286
1287         return 0;
1288 }
1289
1290 static int wl1251_register_hw(struct wl1251 *wl)
1291 {
1292         int ret;
1293
1294         if (wl->mac80211_registered)
1295                 return 0;
1296
1297         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1298
1299         ret = ieee80211_register_hw(wl->hw);
1300         if (ret < 0) {
1301                 wl1251_error("unable to register mac80211 hw: %d", ret);
1302                 return ret;
1303         }
1304
1305         wl->mac80211_registered = true;
1306
1307         wl1251_notice("loaded");
1308
1309         return 0;
1310 }
1311
1312 int wl1251_init_ieee80211(struct wl1251 *wl)
1313 {
1314         int ret;
1315
1316         /* The tx descriptor buffer and the TKIP space */
1317         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1318                 + WL1251_TKIP_IV_SPACE;
1319
1320         /* unit us */
1321         /* FIXME: find a proper value */
1322         wl->hw->channel_change_time = 10000;
1323
1324         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1325                 IEEE80211_HW_SUPPORTS_PS |
1326                 IEEE80211_HW_BEACON_FILTER |
1327                 IEEE80211_HW_SUPPORTS_UAPSD |
1328                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1329
1330         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1331                                          BIT(NL80211_IFTYPE_ADHOC);
1332         wl->hw->wiphy->max_scan_ssids = 1;
1333         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1334
1335         wl->hw->queues = 4;
1336
1337         if (wl->use_eeprom)
1338                 wl1251_read_eeprom_mac(wl);
1339
1340         ret = wl1251_register_hw(wl);
1341         if (ret)
1342                 goto out;
1343
1344         wl1251_debugfs_init(wl);
1345         wl1251_notice("initialized");
1346
1347         ret = 0;
1348
1349 out:
1350         return ret;
1351 }
1352 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1353
1354 struct ieee80211_hw *wl1251_alloc_hw(void)
1355 {
1356         struct ieee80211_hw *hw;
1357         struct wl1251 *wl;
1358         int i;
1359         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1360
1361         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1362         if (!hw) {
1363                 wl1251_error("could not alloc ieee80211_hw");
1364                 return ERR_PTR(-ENOMEM);
1365         }
1366
1367         wl = hw->priv;
1368         memset(wl, 0, sizeof(*wl));
1369
1370         wl->hw = hw;
1371
1372         wl->data_in_count = 0;
1373
1374         skb_queue_head_init(&wl->tx_queue);
1375
1376         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1377         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1378         wl->channel = WL1251_DEFAULT_CHANNEL;
1379         wl->scanning = false;
1380         wl->default_key = 0;
1381         wl->listen_int = 1;
1382         wl->rx_counter = 0;
1383         wl->rx_handled = 0;
1384         wl->rx_current_buffer = 0;
1385         wl->rx_last_id = 0;
1386         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1387         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1388         wl->elp = false;
1389         wl->psm = 0;
1390         wl->psm_requested = false;
1391         wl->tx_queue_stopped = false;
1392         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1393         wl->rssi_thold = 0;
1394         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1395         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1396         wl->vif = NULL;
1397
1398         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1399                 wl->tx_frames[i] = NULL;
1400
1401         wl->next_tx_complete = 0;
1402
1403         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1404         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1405
1406         /*
1407          * In case our MAC address is not correctly set,
1408          * we use a random but Nokia MAC.
1409          */
1410         memcpy(wl->mac_addr, nokia_oui, 3);
1411         get_random_bytes(wl->mac_addr + 3, 3);
1412
1413         wl->state = WL1251_STATE_OFF;
1414         mutex_init(&wl->mutex);
1415
1416         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1417         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1418
1419         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1420         if (!wl->rx_descriptor) {
1421                 wl1251_error("could not allocate memory for rx descriptor");
1422                 ieee80211_free_hw(hw);
1423                 return ERR_PTR(-ENOMEM);
1424         }
1425
1426         return hw;
1427 }
1428 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1429
1430 int wl1251_free_hw(struct wl1251 *wl)
1431 {
1432         ieee80211_unregister_hw(wl->hw);
1433
1434         wl1251_debugfs_exit(wl);
1435
1436         kfree(wl->target_mem_map);
1437         kfree(wl->data_path);
1438         vfree(wl->fw);
1439         wl->fw = NULL;
1440         kfree(wl->nvs);
1441         wl->nvs = NULL;
1442
1443         kfree(wl->rx_descriptor);
1444         wl->rx_descriptor = NULL;
1445
1446         ieee80211_free_hw(wl->hw);
1447
1448         return 0;
1449 }
1450 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1451
1452 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1453 MODULE_LICENSE("GPL");
1454 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1455 MODULE_FIRMWARE(WL1251_FW_NAME);