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mac80211: make tx() operation return void
[deliverable/linux.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 void 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
406 static int wl1251_op_start(struct ieee80211_hw *hw)
407 {
408 struct wl1251 *wl = hw->priv;
409 struct wiphy *wiphy = hw->wiphy;
410 int ret = 0;
411
412 wl1251_debug(DEBUG_MAC80211, "mac80211 start");
413
414 mutex_lock(&wl->mutex);
415
416 if (wl->state != WL1251_STATE_OFF) {
417 wl1251_error("cannot start because not in off state: %d",
418 wl->state);
419 ret = -EBUSY;
420 goto out;
421 }
422
423 ret = wl1251_chip_wakeup(wl);
424 if (ret < 0)
425 goto out;
426
427 ret = wl1251_boot(wl);
428 if (ret < 0)
429 goto out;
430
431 ret = wl1251_hw_init(wl);
432 if (ret < 0)
433 goto out;
434
435 ret = wl1251_acx_station_id(wl);
436 if (ret < 0)
437 goto out;
438
439 wl->state = WL1251_STATE_ON;
440
441 wl1251_info("firmware booted (%s)", wl->fw_ver);
442
443 /* update hw/fw version info in wiphy struct */
444 wiphy->hw_version = wl->chip_id;
445 strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
446
447 out:
448 if (ret < 0)
449 wl1251_power_off(wl);
450
451 mutex_unlock(&wl->mutex);
452
453 return ret;
454 }
455
456 static void wl1251_op_stop(struct ieee80211_hw *hw)
457 {
458 struct wl1251 *wl = hw->priv;
459
460 wl1251_info("down");
461
462 wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
463
464 mutex_lock(&wl->mutex);
465
466 WARN_ON(wl->state != WL1251_STATE_ON);
467
468 if (wl->scanning) {
469 ieee80211_scan_completed(wl->hw, true);
470 wl->scanning = false;
471 }
472
473 wl->state = WL1251_STATE_OFF;
474
475 wl1251_disable_interrupts(wl);
476
477 mutex_unlock(&wl->mutex);
478
479 cancel_work_sync(&wl->irq_work);
480 cancel_work_sync(&wl->tx_work);
481 cancel_work_sync(&wl->filter_work);
482
483 mutex_lock(&wl->mutex);
484
485 /* let's notify MAC80211 about the remaining pending TX frames */
486 wl1251_tx_flush(wl);
487 wl1251_power_off(wl);
488
489 memset(wl->bssid, 0, ETH_ALEN);
490 wl->listen_int = 1;
491 wl->bss_type = MAX_BSS_TYPE;
492
493 wl->data_in_count = 0;
494 wl->rx_counter = 0;
495 wl->rx_handled = 0;
496 wl->rx_current_buffer = 0;
497 wl->rx_last_id = 0;
498 wl->next_tx_complete = 0;
499 wl->elp = false;
500 wl->psm = 0;
501 wl->tx_queue_stopped = false;
502 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
503 wl->rssi_thold = 0;
504 wl->channel = WL1251_DEFAULT_CHANNEL;
505
506 wl1251_debugfs_reset(wl);
507
508 mutex_unlock(&wl->mutex);
509 }
510
511 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
512 struct ieee80211_vif *vif)
513 {
514 struct wl1251 *wl = hw->priv;
515 int ret = 0;
516
517 wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
518 vif->type, vif->addr);
519
520 mutex_lock(&wl->mutex);
521 if (wl->vif) {
522 ret = -EBUSY;
523 goto out;
524 }
525
526 wl->vif = vif;
527
528 switch (vif->type) {
529 case NL80211_IFTYPE_STATION:
530 wl->bss_type = BSS_TYPE_STA_BSS;
531 break;
532 case NL80211_IFTYPE_ADHOC:
533 wl->bss_type = BSS_TYPE_IBSS;
534 break;
535 default:
536 ret = -EOPNOTSUPP;
537 goto out;
538 }
539
540 if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
541 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
542 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
543 ret = wl1251_acx_station_id(wl);
544 if (ret < 0)
545 goto out;
546 }
547
548 out:
549 mutex_unlock(&wl->mutex);
550 return ret;
551 }
552
553 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
554 struct ieee80211_vif *vif)
555 {
556 struct wl1251 *wl = hw->priv;
557
558 mutex_lock(&wl->mutex);
559 wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
560 wl->vif = NULL;
561 mutex_unlock(&wl->mutex);
562 }
563
564 static int wl1251_build_qos_null_data(struct wl1251 *wl)
565 {
566 struct ieee80211_qos_hdr template;
567
568 memset(&template, 0, sizeof(template));
569
570 memcpy(template.addr1, wl->bssid, ETH_ALEN);
571 memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
572 memcpy(template.addr3, wl->bssid, ETH_ALEN);
573
574 template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
575 IEEE80211_STYPE_QOS_NULLFUNC |
576 IEEE80211_FCTL_TODS);
577
578 /* FIXME: not sure what priority to use here */
579 template.qos_ctrl = cpu_to_le16(0);
580
581 return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
582 sizeof(template));
583 }
584
585 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
586 {
587 struct wl1251 *wl = hw->priv;
588 struct ieee80211_conf *conf = &hw->conf;
589 int channel, ret = 0;
590
591 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
592
593 wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
594 channel,
595 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
596 conf->power_level);
597
598 mutex_lock(&wl->mutex);
599
600 ret = wl1251_ps_elp_wakeup(wl);
601 if (ret < 0)
602 goto out;
603
604 if (channel != wl->channel) {
605 wl->channel = channel;
606
607 ret = wl1251_join(wl, wl->bss_type, wl->channel,
608 wl->beacon_int, wl->dtim_period);
609 if (ret < 0)
610 goto out_sleep;
611 }
612
613 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
614 wl1251_debug(DEBUG_PSM, "psm enabled");
615
616 wl->psm_requested = true;
617
618 wl->dtim_period = conf->ps_dtim_period;
619
620 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
621 wl->dtim_period);
622
623 /*
624 * mac80211 enables PSM only if we're already associated.
625 */
626 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
627 if (ret < 0)
628 goto out_sleep;
629 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
630 wl->psm_requested) {
631 wl1251_debug(DEBUG_PSM, "psm disabled");
632
633 wl->psm_requested = false;
634
635 if (wl->psm) {
636 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
637 if (ret < 0)
638 goto out_sleep;
639 }
640 }
641
642 if (conf->power_level != wl->power_level) {
643 ret = wl1251_acx_tx_power(wl, conf->power_level);
644 if (ret < 0)
645 goto out_sleep;
646
647 wl->power_level = conf->power_level;
648 }
649
650 out_sleep:
651 wl1251_ps_elp_sleep(wl);
652
653 out:
654 mutex_unlock(&wl->mutex);
655
656 return ret;
657 }
658
659 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
660 FIF_ALLMULTI | \
661 FIF_FCSFAIL | \
662 FIF_BCN_PRBRESP_PROMISC | \
663 FIF_CONTROL | \
664 FIF_OTHER_BSS)
665
666 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
667 unsigned int changed,
668 unsigned int *total,u64 multicast)
669 {
670 struct wl1251 *wl = hw->priv;
671
672 wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
673
674 *total &= WL1251_SUPPORTED_FILTERS;
675 changed &= WL1251_SUPPORTED_FILTERS;
676
677 if (changed == 0)
678 /* no filters which we support changed */
679 return;
680
681 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
682
683 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
684 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
685
686 if (*total & FIF_PROMISC_IN_BSS) {
687 wl->rx_config |= CFG_BSSID_FILTER_EN;
688 wl->rx_config |= CFG_RX_ALL_GOOD;
689 }
690 if (*total & FIF_ALLMULTI)
691 /*
692 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
693 * all multicast frames
694 */
695 wl->rx_config &= ~CFG_MC_FILTER_EN;
696 if (*total & FIF_FCSFAIL)
697 wl->rx_filter |= CFG_RX_FCS_ERROR;
698 if (*total & FIF_BCN_PRBRESP_PROMISC) {
699 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
700 wl->rx_config &= ~CFG_SSID_FILTER_EN;
701 }
702 if (*total & FIF_CONTROL)
703 wl->rx_filter |= CFG_RX_CTL_EN;
704 if (*total & FIF_OTHER_BSS)
705 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
706
707 /*
708 * FIXME: workqueues need to be properly cancelled on stop(), for
709 * now let's just disable changing the filter settings. They will
710 * be updated any on config().
711 */
712 /* schedule_work(&wl->filter_work); */
713 }
714
715 /* HW encryption */
716 static int wl1251_set_key_type(struct wl1251 *wl,
717 struct wl1251_cmd_set_keys *key,
718 enum set_key_cmd cmd,
719 struct ieee80211_key_conf *mac80211_key,
720 const u8 *addr)
721 {
722 switch (mac80211_key->cipher) {
723 case WLAN_CIPHER_SUITE_WEP40:
724 case WLAN_CIPHER_SUITE_WEP104:
725 if (is_broadcast_ether_addr(addr))
726 key->key_type = KEY_WEP_DEFAULT;
727 else
728 key->key_type = KEY_WEP_ADDR;
729
730 mac80211_key->hw_key_idx = mac80211_key->keyidx;
731 break;
732 case WLAN_CIPHER_SUITE_TKIP:
733 if (is_broadcast_ether_addr(addr))
734 key->key_type = KEY_TKIP_MIC_GROUP;
735 else
736 key->key_type = KEY_TKIP_MIC_PAIRWISE;
737
738 mac80211_key->hw_key_idx = mac80211_key->keyidx;
739 break;
740 case WLAN_CIPHER_SUITE_CCMP:
741 if (is_broadcast_ether_addr(addr))
742 key->key_type = KEY_AES_GROUP;
743 else
744 key->key_type = KEY_AES_PAIRWISE;
745 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
746 break;
747 default:
748 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
749 return -EOPNOTSUPP;
750 }
751
752 return 0;
753 }
754
755 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
756 struct ieee80211_vif *vif,
757 struct ieee80211_sta *sta,
758 struct ieee80211_key_conf *key)
759 {
760 struct wl1251 *wl = hw->priv;
761 struct wl1251_cmd_set_keys *wl_cmd;
762 const u8 *addr;
763 int ret;
764
765 static const u8 bcast_addr[ETH_ALEN] =
766 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
767
768 wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
769
770 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
771 if (!wl_cmd) {
772 ret = -ENOMEM;
773 goto out;
774 }
775
776 addr = sta ? sta->addr : bcast_addr;
777
778 wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
779 wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
780 wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
781 key->cipher, key->keyidx, key->keylen, key->flags);
782 wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
783
784 if (is_zero_ether_addr(addr)) {
785 /* We dont support TX only encryption */
786 ret = -EOPNOTSUPP;
787 goto out;
788 }
789
790 mutex_lock(&wl->mutex);
791
792 ret = wl1251_ps_elp_wakeup(wl);
793 if (ret < 0)
794 goto out_unlock;
795
796 switch (cmd) {
797 case SET_KEY:
798 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
799 break;
800 case DISABLE_KEY:
801 wl_cmd->key_action = KEY_REMOVE;
802 break;
803 default:
804 wl1251_error("Unsupported key cmd 0x%x", cmd);
805 break;
806 }
807
808 ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
809 if (ret < 0) {
810 wl1251_error("Set KEY type failed");
811 goto out_sleep;
812 }
813
814 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
815 memcpy(wl_cmd->addr, addr, ETH_ALEN);
816
817 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
818 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
819 /*
820 * We get the key in the following form:
821 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
822 * but the target is expecting:
823 * TKIP - RX MIC - TX MIC
824 */
825 memcpy(wl_cmd->key, key->key, 16);
826 memcpy(wl_cmd->key + 16, key->key + 24, 8);
827 memcpy(wl_cmd->key + 24, key->key + 16, 8);
828
829 } else {
830 memcpy(wl_cmd->key, key->key, key->keylen);
831 }
832 wl_cmd->key_size = key->keylen;
833
834 wl_cmd->id = key->keyidx;
835 wl_cmd->ssid_profile = 0;
836
837 wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
838
839 ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
840 if (ret < 0) {
841 wl1251_warning("could not set keys");
842 goto out_sleep;
843 }
844
845 out_sleep:
846 wl1251_ps_elp_sleep(wl);
847
848 out_unlock:
849 mutex_unlock(&wl->mutex);
850
851 out:
852 kfree(wl_cmd);
853
854 return ret;
855 }
856
857 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
858 struct ieee80211_vif *vif,
859 struct cfg80211_scan_request *req)
860 {
861 struct wl1251 *wl = hw->priv;
862 struct sk_buff *skb;
863 size_t ssid_len = 0;
864 u8 *ssid = NULL;
865 int ret;
866
867 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
868
869 if (req->n_ssids) {
870 ssid = req->ssids[0].ssid;
871 ssid_len = req->ssids[0].ssid_len;
872 }
873
874 mutex_lock(&wl->mutex);
875
876 if (wl->scanning) {
877 wl1251_debug(DEBUG_SCAN, "scan already in progress");
878 ret = -EINVAL;
879 goto out;
880 }
881
882 ret = wl1251_ps_elp_wakeup(wl);
883 if (ret < 0)
884 goto out;
885
886 skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
887 req->ie, req->ie_len);
888 if (!skb) {
889 ret = -ENOMEM;
890 goto out;
891 }
892
893 ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
894 skb->len);
895 dev_kfree_skb(skb);
896 if (ret < 0)
897 goto out_sleep;
898
899 ret = wl1251_cmd_trigger_scan_to(wl, 0);
900 if (ret < 0)
901 goto out_sleep;
902
903 wl->scanning = true;
904
905 ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
906 req->n_channels, WL1251_SCAN_NUM_PROBES);
907 if (ret < 0) {
908 wl->scanning = false;
909 goto out_sleep;
910 }
911
912 out_sleep:
913 wl1251_ps_elp_sleep(wl);
914
915 out:
916 mutex_unlock(&wl->mutex);
917
918 return ret;
919 }
920
921 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
922 {
923 struct wl1251 *wl = hw->priv;
924 int ret;
925
926 mutex_lock(&wl->mutex);
927
928 ret = wl1251_ps_elp_wakeup(wl);
929 if (ret < 0)
930 goto out;
931
932 ret = wl1251_acx_rts_threshold(wl, (u16) value);
933 if (ret < 0)
934 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
935
936 wl1251_ps_elp_sleep(wl);
937
938 out:
939 mutex_unlock(&wl->mutex);
940
941 return ret;
942 }
943
944 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
945 struct ieee80211_vif *vif,
946 struct ieee80211_bss_conf *bss_conf,
947 u32 changed)
948 {
949 struct wl1251 *wl = hw->priv;
950 struct sk_buff *beacon, *skb;
951 int ret;
952
953 wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
954
955 mutex_lock(&wl->mutex);
956
957 ret = wl1251_ps_elp_wakeup(wl);
958 if (ret < 0)
959 goto out;
960
961 if (changed & BSS_CHANGED_CQM) {
962 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
963 WL1251_DEFAULT_LOW_RSSI_WEIGHT,
964 WL1251_DEFAULT_LOW_RSSI_DEPTH,
965 WL1251_ACX_LOW_RSSI_TYPE_EDGE);
966 if (ret < 0)
967 goto out;
968 wl->rssi_thold = bss_conf->cqm_rssi_thold;
969 }
970
971 if (changed & BSS_CHANGED_BSSID) {
972 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
973
974 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
975 if (!skb)
976 goto out_sleep;
977
978 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
979 skb->data, skb->len);
980 dev_kfree_skb(skb);
981 if (ret < 0)
982 goto out_sleep;
983
984 ret = wl1251_build_qos_null_data(wl);
985 if (ret < 0)
986 goto out;
987
988 if (wl->bss_type != BSS_TYPE_IBSS) {
989 ret = wl1251_join(wl, wl->bss_type, wl->channel,
990 wl->beacon_int, wl->dtim_period);
991 if (ret < 0)
992 goto out_sleep;
993 }
994 }
995
996 if (changed & BSS_CHANGED_ASSOC) {
997 if (bss_conf->assoc) {
998 wl->beacon_int = bss_conf->beacon_int;
999
1000 skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1001 if (!skb)
1002 goto out_sleep;
1003
1004 ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1005 skb->data,
1006 skb->len);
1007 dev_kfree_skb(skb);
1008 if (ret < 0)
1009 goto out_sleep;
1010
1011 ret = wl1251_acx_aid(wl, bss_conf->aid);
1012 if (ret < 0)
1013 goto out_sleep;
1014 } else {
1015 /* use defaults when not associated */
1016 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1017 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1018 }
1019 }
1020 if (changed & BSS_CHANGED_ERP_SLOT) {
1021 if (bss_conf->use_short_slot)
1022 ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1023 else
1024 ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1025 if (ret < 0) {
1026 wl1251_warning("Set slot time failed %d", ret);
1027 goto out_sleep;
1028 }
1029 }
1030
1031 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1032 if (bss_conf->use_short_preamble)
1033 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1034 else
1035 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1036 }
1037
1038 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1039 if (bss_conf->use_cts_prot)
1040 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1041 else
1042 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1043 if (ret < 0) {
1044 wl1251_warning("Set ctsprotect failed %d", ret);
1045 goto out_sleep;
1046 }
1047 }
1048
1049 if (changed & BSS_CHANGED_BEACON) {
1050 beacon = ieee80211_beacon_get(hw, vif);
1051 if (!beacon)
1052 goto out_sleep;
1053
1054 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1055 beacon->len);
1056
1057 if (ret < 0) {
1058 dev_kfree_skb(beacon);
1059 goto out_sleep;
1060 }
1061
1062 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1063 beacon->len);
1064
1065 dev_kfree_skb(beacon);
1066
1067 if (ret < 0)
1068 goto out_sleep;
1069
1070 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1071 wl->channel, wl->dtim_period);
1072
1073 if (ret < 0)
1074 goto out_sleep;
1075 }
1076
1077 out_sleep:
1078 wl1251_ps_elp_sleep(wl);
1079
1080 out:
1081 mutex_unlock(&wl->mutex);
1082 }
1083
1084
1085 /* can't be const, mac80211 writes to this */
1086 static struct ieee80211_rate wl1251_rates[] = {
1087 { .bitrate = 10,
1088 .hw_value = 0x1,
1089 .hw_value_short = 0x1, },
1090 { .bitrate = 20,
1091 .hw_value = 0x2,
1092 .hw_value_short = 0x2,
1093 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1094 { .bitrate = 55,
1095 .hw_value = 0x4,
1096 .hw_value_short = 0x4,
1097 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1098 { .bitrate = 110,
1099 .hw_value = 0x20,
1100 .hw_value_short = 0x20,
1101 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1102 { .bitrate = 60,
1103 .hw_value = 0x8,
1104 .hw_value_short = 0x8, },
1105 { .bitrate = 90,
1106 .hw_value = 0x10,
1107 .hw_value_short = 0x10, },
1108 { .bitrate = 120,
1109 .hw_value = 0x40,
1110 .hw_value_short = 0x40, },
1111 { .bitrate = 180,
1112 .hw_value = 0x80,
1113 .hw_value_short = 0x80, },
1114 { .bitrate = 240,
1115 .hw_value = 0x200,
1116 .hw_value_short = 0x200, },
1117 { .bitrate = 360,
1118 .hw_value = 0x400,
1119 .hw_value_short = 0x400, },
1120 { .bitrate = 480,
1121 .hw_value = 0x800,
1122 .hw_value_short = 0x800, },
1123 { .bitrate = 540,
1124 .hw_value = 0x1000,
1125 .hw_value_short = 0x1000, },
1126 };
1127
1128 /* can't be const, mac80211 writes to this */
1129 static struct ieee80211_channel wl1251_channels[] = {
1130 { .hw_value = 1, .center_freq = 2412},
1131 { .hw_value = 2, .center_freq = 2417},
1132 { .hw_value = 3, .center_freq = 2422},
1133 { .hw_value = 4, .center_freq = 2427},
1134 { .hw_value = 5, .center_freq = 2432},
1135 { .hw_value = 6, .center_freq = 2437},
1136 { .hw_value = 7, .center_freq = 2442},
1137 { .hw_value = 8, .center_freq = 2447},
1138 { .hw_value = 9, .center_freq = 2452},
1139 { .hw_value = 10, .center_freq = 2457},
1140 { .hw_value = 11, .center_freq = 2462},
1141 { .hw_value = 12, .center_freq = 2467},
1142 { .hw_value = 13, .center_freq = 2472},
1143 };
1144
1145 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1146 const struct ieee80211_tx_queue_params *params)
1147 {
1148 enum wl1251_acx_ps_scheme ps_scheme;
1149 struct wl1251 *wl = hw->priv;
1150 int ret;
1151
1152 mutex_lock(&wl->mutex);
1153
1154 wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1155
1156 ret = wl1251_ps_elp_wakeup(wl);
1157 if (ret < 0)
1158 goto out;
1159
1160 /* mac80211 uses units of 32 usec */
1161 ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1162 params->cw_min, params->cw_max,
1163 params->aifs, params->txop * 32);
1164 if (ret < 0)
1165 goto out_sleep;
1166
1167 if (params->uapsd)
1168 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1169 else
1170 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1171
1172 ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1173 CHANNEL_TYPE_EDCF,
1174 wl1251_tx_get_queue(queue), ps_scheme,
1175 WL1251_ACX_ACK_POLICY_LEGACY);
1176 if (ret < 0)
1177 goto out_sleep;
1178
1179 out_sleep:
1180 wl1251_ps_elp_sleep(wl);
1181
1182 out:
1183 mutex_unlock(&wl->mutex);
1184
1185 return ret;
1186 }
1187
1188 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1189 struct survey_info *survey)
1190 {
1191 struct wl1251 *wl = hw->priv;
1192 struct ieee80211_conf *conf = &hw->conf;
1193
1194 if (idx != 0)
1195 return -ENOENT;
1196
1197 survey->channel = conf->channel;
1198 survey->filled = SURVEY_INFO_NOISE_DBM;
1199 survey->noise = wl->noise;
1200
1201 return 0;
1202 }
1203
1204 /* can't be const, mac80211 writes to this */
1205 static struct ieee80211_supported_band wl1251_band_2ghz = {
1206 .channels = wl1251_channels,
1207 .n_channels = ARRAY_SIZE(wl1251_channels),
1208 .bitrates = wl1251_rates,
1209 .n_bitrates = ARRAY_SIZE(wl1251_rates),
1210 };
1211
1212 static const struct ieee80211_ops wl1251_ops = {
1213 .start = wl1251_op_start,
1214 .stop = wl1251_op_stop,
1215 .add_interface = wl1251_op_add_interface,
1216 .remove_interface = wl1251_op_remove_interface,
1217 .config = wl1251_op_config,
1218 .configure_filter = wl1251_op_configure_filter,
1219 .tx = wl1251_op_tx,
1220 .set_key = wl1251_op_set_key,
1221 .hw_scan = wl1251_op_hw_scan,
1222 .bss_info_changed = wl1251_op_bss_info_changed,
1223 .set_rts_threshold = wl1251_op_set_rts_threshold,
1224 .conf_tx = wl1251_op_conf_tx,
1225 .get_survey = wl1251_op_get_survey,
1226 };
1227
1228 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1229 {
1230 unsigned long timeout;
1231
1232 wl1251_reg_write32(wl, EE_ADDR, offset);
1233 wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1234
1235 /* EE_CTL_READ clears when data is ready */
1236 timeout = jiffies + msecs_to_jiffies(100);
1237 while (1) {
1238 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1239 break;
1240
1241 if (time_after(jiffies, timeout))
1242 return -ETIMEDOUT;
1243
1244 msleep(1);
1245 }
1246
1247 *data = wl1251_reg_read32(wl, EE_DATA);
1248 return 0;
1249 }
1250
1251 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1252 u8 *data, size_t len)
1253 {
1254 size_t i;
1255 int ret;
1256
1257 wl1251_reg_write32(wl, EE_START, 0);
1258
1259 for (i = 0; i < len; i++) {
1260 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1261 if (ret < 0)
1262 return ret;
1263 }
1264
1265 return 0;
1266 }
1267
1268 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1269 {
1270 u8 mac[ETH_ALEN];
1271 int i, ret;
1272
1273 wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1274
1275 ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1276 if (ret < 0) {
1277 wl1251_warning("failed to read MAC address from EEPROM");
1278 return ret;
1279 }
1280
1281 /* MAC is stored in reverse order */
1282 for (i = 0; i < ETH_ALEN; i++)
1283 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1284
1285 return 0;
1286 }
1287
1288 static int wl1251_register_hw(struct wl1251 *wl)
1289 {
1290 int ret;
1291
1292 if (wl->mac80211_registered)
1293 return 0;
1294
1295 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1296
1297 ret = ieee80211_register_hw(wl->hw);
1298 if (ret < 0) {
1299 wl1251_error("unable to register mac80211 hw: %d", ret);
1300 return ret;
1301 }
1302
1303 wl->mac80211_registered = true;
1304
1305 wl1251_notice("loaded");
1306
1307 return 0;
1308 }
1309
1310 int wl1251_init_ieee80211(struct wl1251 *wl)
1311 {
1312 int ret;
1313
1314 /* The tx descriptor buffer and the TKIP space */
1315 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1316 + WL1251_TKIP_IV_SPACE;
1317
1318 /* unit us */
1319 /* FIXME: find a proper value */
1320 wl->hw->channel_change_time = 10000;
1321
1322 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1323 IEEE80211_HW_SUPPORTS_PS |
1324 IEEE80211_HW_BEACON_FILTER |
1325 IEEE80211_HW_SUPPORTS_UAPSD |
1326 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1327
1328 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1329 BIT(NL80211_IFTYPE_ADHOC);
1330 wl->hw->wiphy->max_scan_ssids = 1;
1331 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1332
1333 wl->hw->queues = 4;
1334
1335 if (wl->use_eeprom)
1336 wl1251_read_eeprom_mac(wl);
1337
1338 ret = wl1251_register_hw(wl);
1339 if (ret)
1340 goto out;
1341
1342 wl1251_debugfs_init(wl);
1343 wl1251_notice("initialized");
1344
1345 ret = 0;
1346
1347 out:
1348 return ret;
1349 }
1350 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1351
1352 struct ieee80211_hw *wl1251_alloc_hw(void)
1353 {
1354 struct ieee80211_hw *hw;
1355 struct wl1251 *wl;
1356 int i;
1357 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1358
1359 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1360 if (!hw) {
1361 wl1251_error("could not alloc ieee80211_hw");
1362 return ERR_PTR(-ENOMEM);
1363 }
1364
1365 wl = hw->priv;
1366 memset(wl, 0, sizeof(*wl));
1367
1368 wl->hw = hw;
1369
1370 wl->data_in_count = 0;
1371
1372 skb_queue_head_init(&wl->tx_queue);
1373
1374 INIT_WORK(&wl->filter_work, wl1251_filter_work);
1375 INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1376 wl->channel = WL1251_DEFAULT_CHANNEL;
1377 wl->scanning = false;
1378 wl->default_key = 0;
1379 wl->listen_int = 1;
1380 wl->rx_counter = 0;
1381 wl->rx_handled = 0;
1382 wl->rx_current_buffer = 0;
1383 wl->rx_last_id = 0;
1384 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1385 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1386 wl->elp = false;
1387 wl->psm = 0;
1388 wl->psm_requested = false;
1389 wl->tx_queue_stopped = false;
1390 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1391 wl->rssi_thold = 0;
1392 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1393 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1394 wl->vif = NULL;
1395
1396 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1397 wl->tx_frames[i] = NULL;
1398
1399 wl->next_tx_complete = 0;
1400
1401 INIT_WORK(&wl->irq_work, wl1251_irq_work);
1402 INIT_WORK(&wl->tx_work, wl1251_tx_work);
1403
1404 /*
1405 * In case our MAC address is not correctly set,
1406 * we use a random but Nokia MAC.
1407 */
1408 memcpy(wl->mac_addr, nokia_oui, 3);
1409 get_random_bytes(wl->mac_addr + 3, 3);
1410
1411 wl->state = WL1251_STATE_OFF;
1412 mutex_init(&wl->mutex);
1413
1414 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1415 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1416
1417 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1418 if (!wl->rx_descriptor) {
1419 wl1251_error("could not allocate memory for rx descriptor");
1420 ieee80211_free_hw(hw);
1421 return ERR_PTR(-ENOMEM);
1422 }
1423
1424 return hw;
1425 }
1426 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1427
1428 int wl1251_free_hw(struct wl1251 *wl)
1429 {
1430 ieee80211_unregister_hw(wl->hw);
1431
1432 wl1251_debugfs_exit(wl);
1433
1434 kfree(wl->target_mem_map);
1435 kfree(wl->data_path);
1436 vfree(wl->fw);
1437 wl->fw = NULL;
1438 kfree(wl->nvs);
1439 wl->nvs = NULL;
1440
1441 kfree(wl->rx_descriptor);
1442 wl->rx_descriptor = NULL;
1443
1444 ieee80211_free_hw(wl->hw);
1445
1446 return 0;
1447 }
1448 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1449
1450 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1451 MODULE_LICENSE("GPL");
1452 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1453 MODULE_FIRMWARE(WL1251_FW_NAME);
Linux kernel - Deliverables
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