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wl1251: Fix regression in IRQ loop handling
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / wl12xx / wl1251_main.c
blob2e1c10f9670ae06619573b13227248eb0a13e69a
1 /*
2 * This file is part of wl1251
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Contact: Kalle Valo <kalle.valo@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/interrupt.h>
26 #include <linux/firmware.h>
27 #include <linux/delay.h>
28 #include <linux/irq.h>
29 #include <linux/crc32.h>
30 #include <linux/etherdevice.h>
31 #include <linux/vmalloc.h>
32
33 #include "wl1251.h"
34 #include "wl12xx_80211.h"
35 #include "wl1251_reg.h"
36 #include "wl1251_io.h"
37 #include "wl1251_cmd.h"
38 #include "wl1251_event.h"
39 #include "wl1251_tx.h"
40 #include "wl1251_rx.h"
41 #include "wl1251_ps.h"
42 #include "wl1251_init.h"
43 #include "wl1251_debugfs.h"
44 #include "wl1251_boot.h"
45
46 void wl1251_enable_interrupts(struct wl1251 *wl)
47 {
48 wl->if_ops->enable_irq(wl);
49 }
50
51 void wl1251_disable_interrupts(struct wl1251 *wl)
52 {
53 wl->if_ops->disable_irq(wl);
54 }
55
56 static void wl1251_power_off(struct wl1251 *wl)
57 {
58 wl->set_power(false);
59 }
60
61 static void wl1251_power_on(struct wl1251 *wl)
62 {
63 wl->set_power(true);
64 }
65
66 static int wl1251_fetch_firmware(struct wl1251 *wl)
67 {
68 const struct firmware *fw;
69 struct device *dev = wiphy_dev(wl->hw->wiphy);
70 int ret;
71
72 ret = request_firmware(&fw, WL1251_FW_NAME, dev);
73
74 if (ret < 0) {
75 wl1251_error("could not get firmware: %d", ret);
76 return ret;
77 }
78
79 if (fw->size % 4) {
80 wl1251_error("firmware size is not multiple of 32 bits: %zu",
81 fw->size);
82 ret = -EILSEQ;
83 goto out;
84 }
85
86 wl->fw_len = fw->size;
87 wl->fw = vmalloc(wl->fw_len);
88
89 if (!wl->fw) {
90 wl1251_error("could not allocate memory for the firmware");
91 ret = -ENOMEM;
92 goto out;
93 }
94
95 memcpy(wl->fw, fw->data, wl->fw_len);
96
97 ret = 0;
98
99 out:
100 release_firmware(fw);
101
102 return ret;
103 }
104
105 static int wl1251_fetch_nvs(struct wl1251 *wl)
106 {
107 const struct firmware *fw;
108 struct device *dev = wiphy_dev(wl->hw->wiphy);
109 int ret;
110
111 ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
112
113 if (ret < 0) {
114 wl1251_error("could not get nvs file: %d", ret);
115 return ret;
116 }
117
118 if (fw->size % 4) {
119 wl1251_error("nvs size is not multiple of 32 bits: %zu",
120 fw->size);
121 ret = -EILSEQ;
122 goto out;
123 }
124
125 wl->nvs_len = fw->size;
126 wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
127
128 if (!wl->nvs) {
129 wl1251_error("could not allocate memory for the nvs file");
130 ret = -ENOMEM;
131 goto out;
132 }
133
134 memcpy(wl->nvs, fw->data, wl->nvs_len);
135
136 ret = 0;
137
138 out:
139 release_firmware(fw);
140
141 return ret;
142 }
143
144 static void wl1251_fw_wakeup(struct wl1251 *wl)
145 {
146 u32 elp_reg;
147
148 elp_reg = ELPCTRL_WAKE_UP;
149 wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
150 elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
151
152 if (!(elp_reg & ELPCTRL_WLAN_READY))
153 wl1251_warning("WLAN not ready");
154 }
155
156 static int wl1251_chip_wakeup(struct wl1251 *wl)
157 {
158 int ret = 0;
159
160 wl1251_power_on(wl);
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 /* No NVS from netlink, try to get it from the filesystem */
205 if (wl->nvs == NULL) {
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_ACX_INTR_EVENT_B)) {
299 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
300 intr);
301 if (intr & WL1251_ACX_INTR_EVENT_A)
302 wl1251_event_handle(wl, 0);
303 else
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 /*
344 * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
345 * locking we just sleep instead, for now
346 */
347 msleep(10);
348
349 out:
350 return ret;
351 }
352
353 static void wl1251_filter_work(struct work_struct *work)
354 {
355 struct wl1251 *wl =
356 container_of(work, struct wl1251, filter_work);
357 int ret;
358
359 mutex_lock(&wl->mutex);
360
361 if (wl->state == WL1251_STATE_OFF)
362 goto out;
363
364 ret = wl1251_ps_elp_wakeup(wl);
365 if (ret < 0)
366 goto out;
367
368 ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
369 wl->dtim_period);
370 if (ret < 0)
371 goto out_sleep;
372
373 out_sleep:
374 wl1251_ps_elp_sleep(wl);
375
376 out:
377 mutex_unlock(&wl->mutex);
378 }
379
380 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
381 {
382 struct wl1251 *wl = hw->priv;
383
384 skb_queue_tail(&wl->tx_queue, skb);
385
386 /*
387 * The chip specific setup must run before the first TX packet -
388 * before that, the tx_work will not be initialized!
389 */
390
391 ieee80211_queue_work(wl->hw, &wl->tx_work);
392
393 /*
394 * The workqueue is slow to process the tx_queue and we need stop
395 * the queue here, otherwise the queue will get too long.
396 */
397 if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
398 ieee80211_stop_queues(wl->hw);
399
400 /*
401 * FIXME: this is racy, the variable is not properly
402 * protected. Maybe fix this by removing the stupid
403 * variable altogether and checking the real queue state?
404 */
405 wl->tx_queue_stopped = true;
406 }
407
408 return NETDEV_TX_OK;
409 }
410
411 static int wl1251_op_start(struct ieee80211_hw *hw)
412 {
413 struct wl1251 *wl = hw->priv;
414 int ret = 0;
415
416 wl1251_debug(DEBUG_MAC80211, "mac80211 start");
417
418 mutex_lock(&wl->mutex);
419
420 if (wl->state != WL1251_STATE_OFF) {
421 wl1251_error("cannot start because not in off state: %d",
422 wl->state);
423 ret = -EBUSY;
424 goto out;
425 }
426
427 ret = wl1251_chip_wakeup(wl);
428 if (ret < 0)
429 goto out;
430
431 ret = wl1251_boot(wl);
432 if (ret < 0)
433 goto out;
434
435 ret = wl1251_hw_init(wl);
436 if (ret < 0)
437 goto out;
438
439 ret = wl1251_acx_station_id(wl);
440 if (ret < 0)
441 goto out;
442
443 wl->state = WL1251_STATE_ON;
444
445 wl1251_info("firmware booted (%s)", wl->fw_ver);
446
447 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 mutex_unlock(&wl->mutex);
470 ieee80211_scan_completed(wl->hw, true);
471 mutex_lock(&wl->mutex);
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->channel = WL1251_DEFAULT_CHANNEL;
506
507 wl1251_debugfs_reset(wl);
508
509 mutex_unlock(&wl->mutex);
510 }
511
512 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
513 struct ieee80211_if_init_conf *conf)
514 {
515 struct wl1251 *wl = hw->priv;
516 int ret = 0;
517
518 wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
519 conf->type, conf->mac_addr);
520
521 mutex_lock(&wl->mutex);
522 if (wl->vif) {
523 ret = -EBUSY;
524 goto out;
525 }
526
527 wl->vif = conf->vif;
528
529 switch (conf->type) {
530 case NL80211_IFTYPE_STATION:
531 wl->bss_type = BSS_TYPE_STA_BSS;
532 break;
533 case NL80211_IFTYPE_ADHOC:
534 wl->bss_type = BSS_TYPE_IBSS;
535 break;
536 default:
537 ret = -EOPNOTSUPP;
538 goto out;
539 }
540
541 if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
542 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
543 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
544 ret = wl1251_acx_station_id(wl);
545 if (ret < 0)
546 goto out;
547 }
548
549 out:
550 mutex_unlock(&wl->mutex);
551 return ret;
552 }
553
554 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
555 struct ieee80211_if_init_conf *conf)
556 {
557 struct wl1251 *wl = hw->priv;
558
559 mutex_lock(&wl->mutex);
560 wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
561 wl->vif = NULL;
562 mutex_unlock(&wl->mutex);
563 }
564
565 static int wl1251_build_null_data(struct wl1251 *wl)
566 {
567 struct wl12xx_null_data_template template;
568
569 if (!is_zero_ether_addr(wl->bssid)) {
570 memcpy(template.header.da, wl->bssid, ETH_ALEN);
571 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
572 } else {
573 memset(template.header.da, 0xff, ETH_ALEN);
574 memset(template.header.bssid, 0xff, ETH_ALEN);
575 }
576
577 memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
578 template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
579 IEEE80211_STYPE_NULLFUNC);
580
581 return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
582 sizeof(template));
583
584 }
585
586 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
587 {
588 struct wl12xx_ps_poll_template template;
589
590 memcpy(template.bssid, wl->bssid, ETH_ALEN);
591 memcpy(template.ta, wl->mac_addr, ETH_ALEN);
592
593 /* aid in PS-Poll has its two MSBs each set to 1 */
594 template.aid = cpu_to_le16(1 << 15 | 1 << 14 | aid);
595
596 template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
597
598 return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
599 sizeof(template));
600
601 }
602
603 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
604 {
605 struct wl1251 *wl = hw->priv;
606 struct ieee80211_conf *conf = &hw->conf;
607 int channel, ret = 0;
608
609 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
610
611 wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
612 channel,
613 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
614 conf->power_level);
615
616 mutex_lock(&wl->mutex);
617
618 ret = wl1251_ps_elp_wakeup(wl);
619 if (ret < 0)
620 goto out;
621
622 if (channel != wl->channel) {
623 wl->channel = channel;
624
625 ret = wl1251_join(wl, wl->bss_type, wl->channel,
626 wl->beacon_int, wl->dtim_period);
627 if (ret < 0)
628 goto out_sleep;
629 }
630
631 ret = wl1251_build_null_data(wl);
632 if (ret < 0)
633 goto out_sleep;
634
635 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
636 wl1251_debug(DEBUG_PSM, "psm enabled");
637
638 wl->psm_requested = true;
639
640 /*
641 * We enter PSM only if we're already associated.
642 * If we're not, we'll enter it when joining an SSID,
643 * through the bss_info_changed() hook.
644 */
645 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
646 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
647 wl->psm_requested) {
648 wl1251_debug(DEBUG_PSM, "psm disabled");
649
650 wl->psm_requested = false;
651
652 if (wl->psm)
653 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
654 }
655
656 if (conf->power_level != wl->power_level) {
657 ret = wl1251_acx_tx_power(wl, conf->power_level);
658 if (ret < 0)
659 goto out;
660
661 wl->power_level = conf->power_level;
662 }
663
664 out_sleep:
665 wl1251_ps_elp_sleep(wl);
666
667 out:
668 mutex_unlock(&wl->mutex);
669
670 return ret;
671 }
672
673 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
674 FIF_ALLMULTI | \
675 FIF_FCSFAIL | \
676 FIF_BCN_PRBRESP_PROMISC | \
677 FIF_CONTROL | \
678 FIF_OTHER_BSS)
679
680 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
681 unsigned int changed,
682 unsigned int *total,u64 multicast)
683 {
684 struct wl1251 *wl = hw->priv;
685
686 wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
687
688 *total &= WL1251_SUPPORTED_FILTERS;
689 changed &= WL1251_SUPPORTED_FILTERS;
690
691 if (changed == 0)
692 /* no filters which we support changed */
693 return;
694
695 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
696
697 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
698 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
699
700 if (*total & FIF_PROMISC_IN_BSS) {
701 wl->rx_config |= CFG_BSSID_FILTER_EN;
702 wl->rx_config |= CFG_RX_ALL_GOOD;
703 }
704 if (*total & FIF_ALLMULTI)
705 /*
706 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
707 * all multicast frames
708 */
709 wl->rx_config &= ~CFG_MC_FILTER_EN;
710 if (*total & FIF_FCSFAIL)
711 wl->rx_filter |= CFG_RX_FCS_ERROR;
712 if (*total & FIF_BCN_PRBRESP_PROMISC) {
713 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
714 wl->rx_config &= ~CFG_SSID_FILTER_EN;
715 }
716 if (*total & FIF_CONTROL)
717 wl->rx_filter |= CFG_RX_CTL_EN;
718 if (*total & FIF_OTHER_BSS)
719 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
720
721 /*
722 * FIXME: workqueues need to be properly cancelled on stop(), for
723 * now let's just disable changing the filter settings. They will
724 * be updated any on config().
725 */
726 /* schedule_work(&wl->filter_work); */
727 }
728
729 /* HW encryption */
730 static int wl1251_set_key_type(struct wl1251 *wl,
731 struct wl1251_cmd_set_keys *key,
732 enum set_key_cmd cmd,
733 struct ieee80211_key_conf *mac80211_key,
734 const u8 *addr)
735 {
736 switch (mac80211_key->alg) {
737 case ALG_WEP:
738 if (is_broadcast_ether_addr(addr))
739 key->key_type = KEY_WEP_DEFAULT;
740 else
741 key->key_type = KEY_WEP_ADDR;
742
743 mac80211_key->hw_key_idx = mac80211_key->keyidx;
744 break;
745 case ALG_TKIP:
746 if (is_broadcast_ether_addr(addr))
747 key->key_type = KEY_TKIP_MIC_GROUP;
748 else
749 key->key_type = KEY_TKIP_MIC_PAIRWISE;
750
751 mac80211_key->hw_key_idx = mac80211_key->keyidx;
752 break;
753 case ALG_CCMP:
754 if (is_broadcast_ether_addr(addr))
755 key->key_type = KEY_AES_GROUP;
756 else
757 key->key_type = KEY_AES_PAIRWISE;
758 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
759 break;
760 default:
761 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
762 return -EOPNOTSUPP;
763 }
764
765 return 0;
766 }
767
768 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
769 struct ieee80211_vif *vif,
770 struct ieee80211_sta *sta,
771 struct ieee80211_key_conf *key)
772 {
773 struct wl1251 *wl = hw->priv;
774 struct wl1251_cmd_set_keys *wl_cmd;
775 const u8 *addr;
776 int ret;
777
778 static const u8 bcast_addr[ETH_ALEN] =
779 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
780
781 wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
782
783 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
784 if (!wl_cmd) {
785 ret = -ENOMEM;
786 goto out;
787 }
788
789 addr = sta ? sta->addr : bcast_addr;
790
791 wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
792 wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
793 wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
794 key->alg, key->keyidx, key->keylen, key->flags);
795 wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
796
797 if (is_zero_ether_addr(addr)) {
798 /* We dont support TX only encryption */
799 ret = -EOPNOTSUPP;
800 goto out;
801 }
802
803 mutex_lock(&wl->mutex);
804
805 ret = wl1251_ps_elp_wakeup(wl);
806 if (ret < 0)
807 goto out_unlock;
808
809 switch (cmd) {
810 case SET_KEY:
811 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
812 break;
813 case DISABLE_KEY:
814 wl_cmd->key_action = KEY_REMOVE;
815 break;
816 default:
817 wl1251_error("Unsupported key cmd 0x%x", cmd);
818 break;
819 }
820
821 ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
822 if (ret < 0) {
823 wl1251_error("Set KEY type failed");
824 goto out_sleep;
825 }
826
827 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
828 memcpy(wl_cmd->addr, addr, ETH_ALEN);
829
830 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
831 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
832 /*
833 * We get the key in the following form:
834 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
835 * but the target is expecting:
836 * TKIP - RX MIC - TX MIC
837 */
838 memcpy(wl_cmd->key, key->key, 16);
839 memcpy(wl_cmd->key + 16, key->key + 24, 8);
840 memcpy(wl_cmd->key + 24, key->key + 16, 8);
841
842 } else {
843 memcpy(wl_cmd->key, key->key, key->keylen);
844 }
845 wl_cmd->key_size = key->keylen;
846
847 wl_cmd->id = key->keyidx;
848 wl_cmd->ssid_profile = 0;
849
850 wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
851
852 ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
853 if (ret < 0) {
854 wl1251_warning("could not set keys");
855 goto out_sleep;
856 }
857
858 out_sleep:
859 wl1251_ps_elp_sleep(wl);
860
861 out_unlock:
862 mutex_unlock(&wl->mutex);
863
864 out:
865 kfree(wl_cmd);
866
867 return ret;
868 }
869
870 static int wl1251_build_basic_rates(char *rates)
871 {
872 u8 index = 0;
873
874 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
875 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
876 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
877 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
878
879 return index;
880 }
881
882 static int wl1251_build_extended_rates(char *rates)
883 {
884 u8 index = 0;
885
886 rates[index++] = IEEE80211_OFDM_RATE_6MB;
887 rates[index++] = IEEE80211_OFDM_RATE_9MB;
888 rates[index++] = IEEE80211_OFDM_RATE_12MB;
889 rates[index++] = IEEE80211_OFDM_RATE_18MB;
890 rates[index++] = IEEE80211_OFDM_RATE_24MB;
891 rates[index++] = IEEE80211_OFDM_RATE_36MB;
892 rates[index++] = IEEE80211_OFDM_RATE_48MB;
893 rates[index++] = IEEE80211_OFDM_RATE_54MB;
894
895 return index;
896 }
897
898
899 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
900 {
901 struct wl12xx_probe_req_template template;
902 struct wl12xx_ie_rates *rates;
903 char *ptr;
904 u16 size;
905
906 ptr = (char *)&template;
907 size = sizeof(struct ieee80211_header);
908
909 memset(template.header.da, 0xff, ETH_ALEN);
910 memset(template.header.bssid, 0xff, ETH_ALEN);
911 memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
912 template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
913
914 /* IEs */
915 /* SSID */
916 template.ssid.header.id = WLAN_EID_SSID;
917 template.ssid.header.len = ssid_len;
918 if (ssid_len && ssid)
919 memcpy(template.ssid.ssid, ssid, ssid_len);
920 size += sizeof(struct wl12xx_ie_header) + ssid_len;
921 ptr += size;
922
923 /* Basic Rates */
924 rates = (struct wl12xx_ie_rates *)ptr;
925 rates->header.id = WLAN_EID_SUPP_RATES;
926 rates->header.len = wl1251_build_basic_rates(rates->rates);
927 size += sizeof(struct wl12xx_ie_header) + rates->header.len;
928 ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
929
930 /* Extended rates */
931 rates = (struct wl12xx_ie_rates *)ptr;
932 rates->header.id = WLAN_EID_EXT_SUPP_RATES;
933 rates->header.len = wl1251_build_extended_rates(rates->rates);
934 size += sizeof(struct wl12xx_ie_header) + rates->header.len;
935
936 wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
937
938 return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
939 size);
940 }
941
942 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
943 u8 active_scan, u8 high_prio, u8 num_channels,
944 u8 probe_requests)
945 {
946 struct wl1251_cmd_trigger_scan_to *trigger = NULL;
947 struct cmd_scan *params = NULL;
948 int i, ret;
949 u16 scan_options = 0;
950
951 if (wl->scanning)
952 return -EINVAL;
953
954 params = kzalloc(sizeof(*params), GFP_KERNEL);
955 if (!params)
956 return -ENOMEM;
957
958 params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
959 params->params.rx_filter_options =
960 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
961
962 /* High priority scan */
963 if (!active_scan)
964 scan_options |= SCAN_PASSIVE;
965 if (high_prio)
966 scan_options |= SCAN_PRIORITY_HIGH;
967 params->params.scan_options = scan_options;
968
969 params->params.num_channels = num_channels;
970 params->params.num_probe_requests = probe_requests;
971 params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
972 params->params.tid_trigger = 0;
973
974 for (i = 0; i < num_channels; i++) {
975 params->channels[i].min_duration = cpu_to_le32(30000);
976 params->channels[i].max_duration = cpu_to_le32(60000);
977 memset(&params->channels[i].bssid_lsb, 0xff, 4);
978 memset(&params->channels[i].bssid_msb, 0xff, 2);
979 params->channels[i].early_termination = 0;
980 params->channels[i].tx_power_att = 0;
981 params->channels[i].channel = i + 1;
982 memset(params->channels[i].pad, 0, 3);
983 }
984
985 for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
986 memset(&params->channels[i], 0,
987 sizeof(struct basic_scan_channel_parameters));
988
989 if (len && ssid) {
990 params->params.ssid_len = len;
991 memcpy(params->params.ssid, ssid, len);
992 } else {
993 params->params.ssid_len = 0;
994 memset(params->params.ssid, 0, 32);
995 }
996
997 ret = wl1251_build_probe_req(wl, ssid, len);
998 if (ret < 0) {
999 wl1251_error("PROBE request template failed");
1000 goto out;
1001 }
1002
1003 trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
1004 if (!trigger)
1005 goto out;
1006
1007 trigger->timeout = 0;
1008
1009 ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
1010 sizeof(*trigger));
1011 if (ret < 0) {
1012 wl1251_error("trigger scan to failed for hw scan");
1013 goto out;
1014 }
1015
1016 wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
1017
1018 wl->scanning = true;
1019
1020 ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
1021 if (ret < 0)
1022 wl1251_error("SCAN failed");
1023
1024 wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
1025
1026 if (params->header.status != CMD_STATUS_SUCCESS) {
1027 wl1251_error("TEST command answer error: %d",
1028 params->header.status);
1029 wl->scanning = false;
1030 ret = -EIO;
1031 goto out;
1032 }
1033
1034 out:
1035 kfree(params);
1036 return ret;
1037
1038 }
1039
1040 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1041 struct cfg80211_scan_request *req)
1042 {
1043 struct wl1251 *wl = hw->priv;
1044 int ret;
1045 u8 *ssid = NULL;
1046 size_t ssid_len = 0;
1047
1048 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1049
1050 if (req->n_ssids) {
1051 ssid = req->ssids[0].ssid;
1052 ssid_len = req->ssids[0].ssid_len;
1053 }
1054
1055 mutex_lock(&wl->mutex);
1056
1057 ret = wl1251_ps_elp_wakeup(wl);
1058 if (ret < 0)
1059 goto out;
1060
1061 ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1062
1063 wl1251_ps_elp_sleep(wl);
1064
1065 out:
1066 mutex_unlock(&wl->mutex);
1067
1068 return ret;
1069 }
1070
1071 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1072 {
1073 struct wl1251 *wl = hw->priv;
1074 int ret;
1075
1076 mutex_lock(&wl->mutex);
1077
1078 ret = wl1251_ps_elp_wakeup(wl);
1079 if (ret < 0)
1080 goto out;
1081
1082 ret = wl1251_acx_rts_threshold(wl, (u16) value);
1083 if (ret < 0)
1084 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1085
1086 wl1251_ps_elp_sleep(wl);
1087
1088 out:
1089 mutex_unlock(&wl->mutex);
1090
1091 return ret;
1092 }
1093
1094 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1095 struct ieee80211_vif *vif,
1096 struct ieee80211_bss_conf *bss_conf,
1097 u32 changed)
1098 {
1099 enum wl1251_cmd_ps_mode mode;
1100 struct wl1251 *wl = hw->priv;
1101 struct sk_buff *beacon;
1102 int ret;
1103
1104 wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1105
1106 mutex_lock(&wl->mutex);
1107
1108 ret = wl1251_ps_elp_wakeup(wl);
1109 if (ret < 0)
1110 goto out;
1111
1112 if (changed & BSS_CHANGED_ASSOC) {
1113 if (bss_conf->assoc) {
1114 wl->beacon_int = bss_conf->beacon_int;
1115 wl->dtim_period = bss_conf->dtim_period;
1116
1117 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
1118 wl->dtim_period);
1119 wl->aid = bss_conf->aid;
1120
1121 ret = wl1251_build_ps_poll(wl, wl->aid);
1122 if (ret < 0)
1123 goto out_sleep;
1124
1125 ret = wl1251_acx_aid(wl, wl->aid);
1126 if (ret < 0)
1127 goto out_sleep;
1128
1129 /* If we want to go in PSM but we're not there yet */
1130 if (wl->psm_requested && !wl->psm) {
1131 mode = STATION_POWER_SAVE_MODE;
1132 ret = wl1251_ps_set_mode(wl, mode);
1133 if (ret < 0)
1134 goto out_sleep;
1135 }
1136 } else {
1137 /* use defaults when not associated */
1138 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1139 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1140 }
1141 }
1142 if (changed & BSS_CHANGED_ERP_SLOT) {
1143 if (bss_conf->use_short_slot)
1144 ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1145 else
1146 ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1147 if (ret < 0) {
1148 wl1251_warning("Set slot time failed %d", ret);
1149 goto out_sleep;
1150 }
1151 }
1152
1153 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1154 if (bss_conf->use_short_preamble)
1155 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1156 else
1157 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1158 }
1159
1160 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1161 if (bss_conf->use_cts_prot)
1162 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1163 else
1164 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1165 if (ret < 0) {
1166 wl1251_warning("Set ctsprotect failed %d", ret);
1167 goto out;
1168 }
1169 }
1170
1171 if (changed & BSS_CHANGED_BSSID) {
1172 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1173
1174 ret = wl1251_build_null_data(wl);
1175 if (ret < 0)
1176 goto out;
1177
1178 if (wl->bss_type != BSS_TYPE_IBSS) {
1179 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1180 wl->beacon_int, wl->dtim_period);
1181 if (ret < 0)
1182 goto out_sleep;
1183 wl1251_warning("Set ctsprotect failed %d", ret);
1184 goto out_sleep;
1185 }
1186 }
1187
1188 if (changed & BSS_CHANGED_BEACON) {
1189 beacon = ieee80211_beacon_get(hw, vif);
1190 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1191 beacon->len);
1192
1193 if (ret < 0) {
1194 dev_kfree_skb(beacon);
1195 goto out;
1196 }
1197
1198 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1199 beacon->len);
1200
1201 dev_kfree_skb(beacon);
1202
1203 if (ret < 0)
1204 goto out;
1205
1206 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1207 wl->channel, wl->dtim_period);
1208
1209 if (ret < 0)
1210 goto out;
1211 }
1212
1213 out_sleep:
1214 wl1251_ps_elp_sleep(wl);
1215
1216 out:
1217 mutex_unlock(&wl->mutex);
1218 }
1219
1220
1221 /* can't be const, mac80211 writes to this */
1222 static struct ieee80211_rate wl1251_rates[] = {
1223 { .bitrate = 10,
1224 .hw_value = 0x1,
1225 .hw_value_short = 0x1, },
1226 { .bitrate = 20,
1227 .hw_value = 0x2,
1228 .hw_value_short = 0x2,
1229 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1230 { .bitrate = 55,
1231 .hw_value = 0x4,
1232 .hw_value_short = 0x4,
1233 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1234 { .bitrate = 110,
1235 .hw_value = 0x20,
1236 .hw_value_short = 0x20,
1237 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1238 { .bitrate = 60,
1239 .hw_value = 0x8,
1240 .hw_value_short = 0x8, },
1241 { .bitrate = 90,
1242 .hw_value = 0x10,
1243 .hw_value_short = 0x10, },
1244 { .bitrate = 120,
1245 .hw_value = 0x40,
1246 .hw_value_short = 0x40, },
1247 { .bitrate = 180,
1248 .hw_value = 0x80,
1249 .hw_value_short = 0x80, },
1250 { .bitrate = 240,
1251 .hw_value = 0x200,
1252 .hw_value_short = 0x200, },
1253 { .bitrate = 360,
1254 .hw_value = 0x400,
1255 .hw_value_short = 0x400, },
1256 { .bitrate = 480,
1257 .hw_value = 0x800,
1258 .hw_value_short = 0x800, },
1259 { .bitrate = 540,
1260 .hw_value = 0x1000,
1261 .hw_value_short = 0x1000, },
1262 };
1263
1264 /* can't be const, mac80211 writes to this */
1265 static struct ieee80211_channel wl1251_channels[] = {
1266 { .hw_value = 1, .center_freq = 2412},
1267 { .hw_value = 2, .center_freq = 2417},
1268 { .hw_value = 3, .center_freq = 2422},
1269 { .hw_value = 4, .center_freq = 2427},
1270 { .hw_value = 5, .center_freq = 2432},
1271 { .hw_value = 6, .center_freq = 2437},
1272 { .hw_value = 7, .center_freq = 2442},
1273 { .hw_value = 8, .center_freq = 2447},
1274 { .hw_value = 9, .center_freq = 2452},
1275 { .hw_value = 10, .center_freq = 2457},
1276 { .hw_value = 11, .center_freq = 2462},
1277 { .hw_value = 12, .center_freq = 2467},
1278 { .hw_value = 13, .center_freq = 2472},
1279 };
1280
1281 /* can't be const, mac80211 writes to this */
1282 static struct ieee80211_supported_band wl1251_band_2ghz = {
1283 .channels = wl1251_channels,
1284 .n_channels = ARRAY_SIZE(wl1251_channels),
1285 .bitrates = wl1251_rates,
1286 .n_bitrates = ARRAY_SIZE(wl1251_rates),
1287 };
1288
1289 static const struct ieee80211_ops wl1251_ops = {
1290 .start = wl1251_op_start,
1291 .stop = wl1251_op_stop,
1292 .add_interface = wl1251_op_add_interface,
1293 .remove_interface = wl1251_op_remove_interface,
1294 .config = wl1251_op_config,
1295 .configure_filter = wl1251_op_configure_filter,
1296 .tx = wl1251_op_tx,
1297 .set_key = wl1251_op_set_key,
1298 .hw_scan = wl1251_op_hw_scan,
1299 .bss_info_changed = wl1251_op_bss_info_changed,
1300 .set_rts_threshold = wl1251_op_set_rts_threshold,
1301 };
1302
1303 static int wl1251_register_hw(struct wl1251 *wl)
1304 {
1305 int ret;
1306
1307 if (wl->mac80211_registered)
1308 return 0;
1309
1310 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1311
1312 ret = ieee80211_register_hw(wl->hw);
1313 if (ret < 0) {
1314 wl1251_error("unable to register mac80211 hw: %d", ret);
1315 return ret;
1316 }
1317
1318 wl->mac80211_registered = true;
1319
1320 wl1251_notice("loaded");
1321
1322 return 0;
1323 }
1324
1325 int wl1251_init_ieee80211(struct wl1251 *wl)
1326 {
1327 int ret;
1328
1329 /* The tx descriptor buffer and the TKIP space */
1330 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1331 + WL1251_TKIP_IV_SPACE;
1332
1333 /* unit us */
1334 /* FIXME: find a proper value */
1335 wl->hw->channel_change_time = 10000;
1336
1337 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1338 IEEE80211_HW_NOISE_DBM |
1339 IEEE80211_HW_SUPPORTS_PS |
1340 IEEE80211_HW_BEACON_FILTER;
1341
1342 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1343 wl->hw->wiphy->max_scan_ssids = 1;
1344 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1345
1346 ret = wl1251_register_hw(wl);
1347 if (ret)
1348 goto out;
1349
1350 wl1251_debugfs_init(wl);
1351 wl1251_notice("initialized");
1352
1353 ret = 0;
1354
1355 out:
1356 return ret;
1357 }
1358 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1359
1360 struct ieee80211_hw *wl1251_alloc_hw(void)
1361 {
1362 struct ieee80211_hw *hw;
1363 struct wl1251 *wl;
1364 int i;
1365 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1366
1367 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1368 if (!hw) {
1369 wl1251_error("could not alloc ieee80211_hw");
1370 return ERR_PTR(-ENOMEM);
1371 }
1372
1373 wl = hw->priv;
1374 memset(wl, 0, sizeof(*wl));
1375
1376 wl->hw = hw;
1377
1378 wl->data_in_count = 0;
1379
1380 skb_queue_head_init(&wl->tx_queue);
1381
1382 INIT_WORK(&wl->filter_work, wl1251_filter_work);
1383 INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1384 wl->channel = WL1251_DEFAULT_CHANNEL;
1385 wl->scanning = false;
1386 wl->default_key = 0;
1387 wl->listen_int = 1;
1388 wl->rx_counter = 0;
1389 wl->rx_handled = 0;
1390 wl->rx_current_buffer = 0;
1391 wl->rx_last_id = 0;
1392 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1393 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1394 wl->elp = false;
1395 wl->psm = 0;
1396 wl->psm_requested = false;
1397 wl->tx_queue_stopped = false;
1398 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1399 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1400 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1401 wl->vif = NULL;
1402
1403 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1404 wl->tx_frames[i] = NULL;
1405
1406 wl->next_tx_complete = 0;
1407
1408 INIT_WORK(&wl->irq_work, wl1251_irq_work);
1409 INIT_WORK(&wl->tx_work, wl1251_tx_work);
1410
1411 /*
1412 * In case our MAC address is not correctly set,
1413 * we use a random but Nokia MAC.
1414 */
1415 memcpy(wl->mac_addr, nokia_oui, 3);
1416 get_random_bytes(wl->mac_addr + 3, 3);
1417
1418 wl->state = WL1251_STATE_OFF;
1419 mutex_init(&wl->mutex);
1420
1421 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1422 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1423
1424 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1425 if (!wl->rx_descriptor) {
1426 wl1251_error("could not allocate memory for rx descriptor");
1427 ieee80211_free_hw(hw);
1428 return ERR_PTR(-ENOMEM);
1429 }
1430
1431 return hw;
1432 }
1433 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1434
1435 int wl1251_free_hw(struct wl1251 *wl)
1436 {
1437 ieee80211_unregister_hw(wl->hw);
1438
1439 wl1251_debugfs_exit(wl);
1440
1441 kfree(wl->target_mem_map);
1442 kfree(wl->data_path);
1443 vfree(wl->fw);
1444 wl->fw = NULL;
1445 kfree(wl->nvs);
1446 wl->nvs = NULL;
1447
1448 kfree(wl->rx_descriptor);
1449 wl->rx_descriptor = NULL;
1450
1451 ieee80211_free_hw(wl->hw);
1452
1453 return 0;
1454 }
1455 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1456
1457 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1458 MODULE_LICENSE("GPL");
1459 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1460 MODULE_ALIAS("spi:wl1251");
1461 MODULE_FIRMWARE(WL1251_FW_NAME);
(deprecated) Btrfs devel tree