?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
wl1251: Send null data packet with "TODS" bit set
[firewire-audio.git] / drivers / net / wireless / wl12xx / wl1251_main.c
blobff4be7bf5d360f8223a7cc3fad7b383fdb75d191
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 IEEE80211_FCTL_TODS);
581
582 return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
583 sizeof(template));
584
585 }
586
587 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
588 {
589 struct wl12xx_ps_poll_template template;
590
591 memcpy(template.bssid, wl->bssid, ETH_ALEN);
592 memcpy(template.ta, wl->mac_addr, ETH_ALEN);
593
594 /* aid in PS-Poll has its two MSBs each set to 1 */
595 template.aid = cpu_to_le16(1 << 15 | 1 << 14 | aid);
596
597 template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
598
599 return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
600 sizeof(template));
601
602 }
603
604 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
605 {
606 struct wl1251 *wl = hw->priv;
607 struct ieee80211_conf *conf = &hw->conf;
608 int channel, ret = 0;
609
610 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
611
612 wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
613 channel,
614 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
615 conf->power_level);
616
617 mutex_lock(&wl->mutex);
618
619 ret = wl1251_ps_elp_wakeup(wl);
620 if (ret < 0)
621 goto out;
622
623 if (channel != wl->channel) {
624 wl->channel = channel;
625
626 ret = wl1251_join(wl, wl->bss_type, wl->channel,
627 wl->beacon_int, wl->dtim_period);
628 if (ret < 0)
629 goto out_sleep;
630 }
631
632 ret = wl1251_build_null_data(wl);
633 if (ret < 0)
634 goto out_sleep;
635
636 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
637 wl1251_debug(DEBUG_PSM, "psm enabled");
638
639 wl->psm_requested = true;
640
641 /*
642 * We enter PSM only if we're already associated.
643 * If we're not, we'll enter it when joining an SSID,
644 * through the bss_info_changed() hook.
645 */
646 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
647 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
648 wl->psm_requested) {
649 wl1251_debug(DEBUG_PSM, "psm disabled");
650
651 wl->psm_requested = false;
652
653 if (wl->psm)
654 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
655 }
656
657 if (conf->power_level != wl->power_level) {
658 ret = wl1251_acx_tx_power(wl, conf->power_level);
659 if (ret < 0)
660 goto out;
661
662 wl->power_level = conf->power_level;
663 }
664
665 out_sleep:
666 wl1251_ps_elp_sleep(wl);
667
668 out:
669 mutex_unlock(&wl->mutex);
670
671 return ret;
672 }
673
674 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
675 FIF_ALLMULTI | \
676 FIF_FCSFAIL | \
677 FIF_BCN_PRBRESP_PROMISC | \
678 FIF_CONTROL | \
679 FIF_OTHER_BSS)
680
681 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
682 unsigned int changed,
683 unsigned int *total,u64 multicast)
684 {
685 struct wl1251 *wl = hw->priv;
686
687 wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
688
689 *total &= WL1251_SUPPORTED_FILTERS;
690 changed &= WL1251_SUPPORTED_FILTERS;
691
692 if (changed == 0)
693 /* no filters which we support changed */
694 return;
695
696 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
697
698 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
699 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
700
701 if (*total & FIF_PROMISC_IN_BSS) {
702 wl->rx_config |= CFG_BSSID_FILTER_EN;
703 wl->rx_config |= CFG_RX_ALL_GOOD;
704 }
705 if (*total & FIF_ALLMULTI)
706 /*
707 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
708 * all multicast frames
709 */
710 wl->rx_config &= ~CFG_MC_FILTER_EN;
711 if (*total & FIF_FCSFAIL)
712 wl->rx_filter |= CFG_RX_FCS_ERROR;
713 if (*total & FIF_BCN_PRBRESP_PROMISC) {
714 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
715 wl->rx_config &= ~CFG_SSID_FILTER_EN;
716 }
717 if (*total & FIF_CONTROL)
718 wl->rx_filter |= CFG_RX_CTL_EN;
719 if (*total & FIF_OTHER_BSS)
720 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
721
722 /*
723 * FIXME: workqueues need to be properly cancelled on stop(), for
724 * now let's just disable changing the filter settings. They will
725 * be updated any on config().
726 */
727 /* schedule_work(&wl->filter_work); */
728 }
729
730 /* HW encryption */
731 static int wl1251_set_key_type(struct wl1251 *wl,
732 struct wl1251_cmd_set_keys *key,
733 enum set_key_cmd cmd,
734 struct ieee80211_key_conf *mac80211_key,
735 const u8 *addr)
736 {
737 switch (mac80211_key->alg) {
738 case ALG_WEP:
739 if (is_broadcast_ether_addr(addr))
740 key->key_type = KEY_WEP_DEFAULT;
741 else
742 key->key_type = KEY_WEP_ADDR;
743
744 mac80211_key->hw_key_idx = mac80211_key->keyidx;
745 break;
746 case ALG_TKIP:
747 if (is_broadcast_ether_addr(addr))
748 key->key_type = KEY_TKIP_MIC_GROUP;
749 else
750 key->key_type = KEY_TKIP_MIC_PAIRWISE;
751
752 mac80211_key->hw_key_idx = mac80211_key->keyidx;
753 break;
754 case ALG_CCMP:
755 if (is_broadcast_ether_addr(addr))
756 key->key_type = KEY_AES_GROUP;
757 else
758 key->key_type = KEY_AES_PAIRWISE;
759 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
760 break;
761 default:
762 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
763 return -EOPNOTSUPP;
764 }
765
766 return 0;
767 }
768
769 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
770 struct ieee80211_vif *vif,
771 struct ieee80211_sta *sta,
772 struct ieee80211_key_conf *key)
773 {
774 struct wl1251 *wl = hw->priv;
775 struct wl1251_cmd_set_keys *wl_cmd;
776 const u8 *addr;
777 int ret;
778
779 static const u8 bcast_addr[ETH_ALEN] =
780 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
781
782 wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
783
784 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
785 if (!wl_cmd) {
786 ret = -ENOMEM;
787 goto out;
788 }
789
790 addr = sta ? sta->addr : bcast_addr;
791
792 wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
793 wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
794 wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
795 key->alg, key->keyidx, key->keylen, key->flags);
796 wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
797
798 if (is_zero_ether_addr(addr)) {
799 /* We dont support TX only encryption */
800 ret = -EOPNOTSUPP;
801 goto out;
802 }
803
804 mutex_lock(&wl->mutex);
805
806 ret = wl1251_ps_elp_wakeup(wl);
807 if (ret < 0)
808 goto out_unlock;
809
810 switch (cmd) {
811 case SET_KEY:
812 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
813 break;
814 case DISABLE_KEY:
815 wl_cmd->key_action = KEY_REMOVE;
816 break;
817 default:
818 wl1251_error("Unsupported key cmd 0x%x", cmd);
819 break;
820 }
821
822 ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
823 if (ret < 0) {
824 wl1251_error("Set KEY type failed");
825 goto out_sleep;
826 }
827
828 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
829 memcpy(wl_cmd->addr, addr, ETH_ALEN);
830
831 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
832 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
833 /*
834 * We get the key in the following form:
835 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
836 * but the target is expecting:
837 * TKIP - RX MIC - TX MIC
838 */
839 memcpy(wl_cmd->key, key->key, 16);
840 memcpy(wl_cmd->key + 16, key->key + 24, 8);
841 memcpy(wl_cmd->key + 24, key->key + 16, 8);
842
843 } else {
844 memcpy(wl_cmd->key, key->key, key->keylen);
845 }
846 wl_cmd->key_size = key->keylen;
847
848 wl_cmd->id = key->keyidx;
849 wl_cmd->ssid_profile = 0;
850
851 wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
852
853 ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
854 if (ret < 0) {
855 wl1251_warning("could not set keys");
856 goto out_sleep;
857 }
858
859 out_sleep:
860 wl1251_ps_elp_sleep(wl);
861
862 out_unlock:
863 mutex_unlock(&wl->mutex);
864
865 out:
866 kfree(wl_cmd);
867
868 return ret;
869 }
870
871 static int wl1251_build_basic_rates(char *rates)
872 {
873 u8 index = 0;
874
875 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
876 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
877 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
878 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
879
880 return index;
881 }
882
883 static int wl1251_build_extended_rates(char *rates)
884 {
885 u8 index = 0;
886
887 rates[index++] = IEEE80211_OFDM_RATE_6MB;
888 rates[index++] = IEEE80211_OFDM_RATE_9MB;
889 rates[index++] = IEEE80211_OFDM_RATE_12MB;
890 rates[index++] = IEEE80211_OFDM_RATE_18MB;
891 rates[index++] = IEEE80211_OFDM_RATE_24MB;
892 rates[index++] = IEEE80211_OFDM_RATE_36MB;
893 rates[index++] = IEEE80211_OFDM_RATE_48MB;
894 rates[index++] = IEEE80211_OFDM_RATE_54MB;
895
896 return index;
897 }
898
899
900 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
901 {
902 struct wl12xx_probe_req_template template;
903 struct wl12xx_ie_rates *rates;
904 char *ptr;
905 u16 size;
906
907 ptr = (char *)&template;
908 size = sizeof(struct ieee80211_header);
909
910 memset(template.header.da, 0xff, ETH_ALEN);
911 memset(template.header.bssid, 0xff, ETH_ALEN);
912 memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
913 template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
914
915 /* IEs */
916 /* SSID */
917 template.ssid.header.id = WLAN_EID_SSID;
918 template.ssid.header.len = ssid_len;
919 if (ssid_len && ssid)
920 memcpy(template.ssid.ssid, ssid, ssid_len);
921 size += sizeof(struct wl12xx_ie_header) + ssid_len;
922 ptr += size;
923
924 /* Basic Rates */
925 rates = (struct wl12xx_ie_rates *)ptr;
926 rates->header.id = WLAN_EID_SUPP_RATES;
927 rates->header.len = wl1251_build_basic_rates(rates->rates);
928 size += sizeof(struct wl12xx_ie_header) + rates->header.len;
929 ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
930
931 /* Extended rates */
932 rates = (struct wl12xx_ie_rates *)ptr;
933 rates->header.id = WLAN_EID_EXT_SUPP_RATES;
934 rates->header.len = wl1251_build_extended_rates(rates->rates);
935 size += sizeof(struct wl12xx_ie_header) + rates->header.len;
936
937 wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
938
939 return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
940 size);
941 }
942
943 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
944 u8 active_scan, u8 high_prio, u8 num_channels,
945 u8 probe_requests)
946 {
947 struct wl1251_cmd_trigger_scan_to *trigger = NULL;
948 struct cmd_scan *params = NULL;
949 int i, ret;
950 u16 scan_options = 0;
951
952 if (wl->scanning)
953 return -EINVAL;
954
955 params = kzalloc(sizeof(*params), GFP_KERNEL);
956 if (!params)
957 return -ENOMEM;
958
959 params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
960 params->params.rx_filter_options =
961 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
962
963 /* High priority scan */
964 if (!active_scan)
965 scan_options |= SCAN_PASSIVE;
966 if (high_prio)
967 scan_options |= SCAN_PRIORITY_HIGH;
968 params->params.scan_options = scan_options;
969
970 params->params.num_channels = num_channels;
971 params->params.num_probe_requests = probe_requests;
972 params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
973 params->params.tid_trigger = 0;
974
975 for (i = 0; i < num_channels; i++) {
976 params->channels[i].min_duration = cpu_to_le32(30000);
977 params->channels[i].max_duration = cpu_to_le32(60000);
978 memset(&params->channels[i].bssid_lsb, 0xff, 4);
979 memset(&params->channels[i].bssid_msb, 0xff, 2);
980 params->channels[i].early_termination = 0;
981 params->channels[i].tx_power_att = 0;
982 params->channels[i].channel = i + 1;
983 memset(params->channels[i].pad, 0, 3);
984 }
985
986 for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
987 memset(&params->channels[i], 0,
988 sizeof(struct basic_scan_channel_parameters));
989
990 if (len && ssid) {
991 params->params.ssid_len = len;
992 memcpy(params->params.ssid, ssid, len);
993 } else {
994 params->params.ssid_len = 0;
995 memset(params->params.ssid, 0, 32);
996 }
997
998 ret = wl1251_build_probe_req(wl, ssid, len);
999 if (ret < 0) {
1000 wl1251_error("PROBE request template failed");
1001 goto out;
1002 }
1003
1004 trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
1005 if (!trigger)
1006 goto out;
1007
1008 trigger->timeout = 0;
1009
1010 ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
1011 sizeof(*trigger));
1012 if (ret < 0) {
1013 wl1251_error("trigger scan to failed for hw scan");
1014 goto out;
1015 }
1016
1017 wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
1018
1019 wl->scanning = true;
1020
1021 ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
1022 if (ret < 0)
1023 wl1251_error("SCAN failed");
1024
1025 wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
1026
1027 if (params->header.status != CMD_STATUS_SUCCESS) {
1028 wl1251_error("TEST command answer error: %d",
1029 params->header.status);
1030 wl->scanning = false;
1031 ret = -EIO;
1032 goto out;
1033 }
1034
1035 out:
1036 kfree(params);
1037 return ret;
1038
1039 }
1040
1041 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1042 struct cfg80211_scan_request *req)
1043 {
1044 struct wl1251 *wl = hw->priv;
1045 int ret;
1046 u8 *ssid = NULL;
1047 size_t ssid_len = 0;
1048
1049 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1050
1051 if (req->n_ssids) {
1052 ssid = req->ssids[0].ssid;
1053 ssid_len = req->ssids[0].ssid_len;
1054 }
1055
1056 mutex_lock(&wl->mutex);
1057
1058 ret = wl1251_ps_elp_wakeup(wl);
1059 if (ret < 0)
1060 goto out;
1061
1062 ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1063
1064 wl1251_ps_elp_sleep(wl);
1065
1066 out:
1067 mutex_unlock(&wl->mutex);
1068
1069 return ret;
1070 }
1071
1072 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1073 {
1074 struct wl1251 *wl = hw->priv;
1075 int ret;
1076
1077 mutex_lock(&wl->mutex);
1078
1079 ret = wl1251_ps_elp_wakeup(wl);
1080 if (ret < 0)
1081 goto out;
1082
1083 ret = wl1251_acx_rts_threshold(wl, (u16) value);
1084 if (ret < 0)
1085 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1086
1087 wl1251_ps_elp_sleep(wl);
1088
1089 out:
1090 mutex_unlock(&wl->mutex);
1091
1092 return ret;
1093 }
1094
1095 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1096 struct ieee80211_vif *vif,
1097 struct ieee80211_bss_conf *bss_conf,
1098 u32 changed)
1099 {
1100 enum wl1251_cmd_ps_mode mode;
1101 struct wl1251 *wl = hw->priv;
1102 struct sk_buff *beacon;
1103 int ret;
1104
1105 wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1106
1107 mutex_lock(&wl->mutex);
1108
1109 ret = wl1251_ps_elp_wakeup(wl);
1110 if (ret < 0)
1111 goto out;
1112
1113 if (changed & BSS_CHANGED_ASSOC) {
1114 if (bss_conf->assoc) {
1115 wl->beacon_int = bss_conf->beacon_int;
1116 wl->dtim_period = bss_conf->dtim_period;
1117
1118 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
1119 wl->dtim_period);
1120 wl->aid = bss_conf->aid;
1121
1122 ret = wl1251_build_ps_poll(wl, wl->aid);
1123 if (ret < 0)
1124 goto out_sleep;
1125
1126 ret = wl1251_acx_aid(wl, wl->aid);
1127 if (ret < 0)
1128 goto out_sleep;
1129
1130 /* If we want to go in PSM but we're not there yet */
1131 if (wl->psm_requested && !wl->psm) {
1132 mode = STATION_POWER_SAVE_MODE;
1133 ret = wl1251_ps_set_mode(wl, mode);
1134 if (ret < 0)
1135 goto out_sleep;
1136 }
1137 } else {
1138 /* use defaults when not associated */
1139 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1140 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1141 }
1142 }
1143 if (changed & BSS_CHANGED_ERP_SLOT) {
1144 if (bss_conf->use_short_slot)
1145 ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1146 else
1147 ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1148 if (ret < 0) {
1149 wl1251_warning("Set slot time failed %d", ret);
1150 goto out_sleep;
1151 }
1152 }
1153
1154 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1155 if (bss_conf->use_short_preamble)
1156 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1157 else
1158 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1159 }
1160
1161 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1162 if (bss_conf->use_cts_prot)
1163 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1164 else
1165 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1166 if (ret < 0) {
1167 wl1251_warning("Set ctsprotect failed %d", ret);
1168 goto out;
1169 }
1170 }
1171
1172 if (changed & BSS_CHANGED_BSSID) {
1173 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1174
1175 ret = wl1251_build_null_data(wl);
1176 if (ret < 0)
1177 goto out;
1178
1179 if (wl->bss_type != BSS_TYPE_IBSS) {
1180 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1181 wl->beacon_int, wl->dtim_period);
1182 if (ret < 0)
1183 goto out_sleep;
1184 wl1251_warning("Set ctsprotect failed %d", ret);
1185 goto out_sleep;
1186 }
1187 }
1188
1189 if (changed & BSS_CHANGED_BEACON) {
1190 beacon = ieee80211_beacon_get(hw, vif);
1191 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1192 beacon->len);
1193
1194 if (ret < 0) {
1195 dev_kfree_skb(beacon);
1196 goto out;
1197 }
1198
1199 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1200 beacon->len);
1201
1202 dev_kfree_skb(beacon);
1203
1204 if (ret < 0)
1205 goto out;
1206
1207 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1208 wl->channel, wl->dtim_period);
1209
1210 if (ret < 0)
1211 goto out;
1212 }
1213
1214 out_sleep:
1215 wl1251_ps_elp_sleep(wl);
1216
1217 out:
1218 mutex_unlock(&wl->mutex);
1219 }
1220
1221
1222 /* can't be const, mac80211 writes to this */
1223 static struct ieee80211_rate wl1251_rates[] = {
1224 { .bitrate = 10,
1225 .hw_value = 0x1,
1226 .hw_value_short = 0x1, },
1227 { .bitrate = 20,
1228 .hw_value = 0x2,
1229 .hw_value_short = 0x2,
1230 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1231 { .bitrate = 55,
1232 .hw_value = 0x4,
1233 .hw_value_short = 0x4,
1234 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1235 { .bitrate = 110,
1236 .hw_value = 0x20,
1237 .hw_value_short = 0x20,
1238 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1239 { .bitrate = 60,
1240 .hw_value = 0x8,
1241 .hw_value_short = 0x8, },
1242 { .bitrate = 90,
1243 .hw_value = 0x10,
1244 .hw_value_short = 0x10, },
1245 { .bitrate = 120,
1246 .hw_value = 0x40,
1247 .hw_value_short = 0x40, },
1248 { .bitrate = 180,
1249 .hw_value = 0x80,
1250 .hw_value_short = 0x80, },
1251 { .bitrate = 240,
1252 .hw_value = 0x200,
1253 .hw_value_short = 0x200, },
1254 { .bitrate = 360,
1255 .hw_value = 0x400,
1256 .hw_value_short = 0x400, },
1257 { .bitrate = 480,
1258 .hw_value = 0x800,
1259 .hw_value_short = 0x800, },
1260 { .bitrate = 540,
1261 .hw_value = 0x1000,
1262 .hw_value_short = 0x1000, },
1263 };
1264
1265 /* can't be const, mac80211 writes to this */
1266 static struct ieee80211_channel wl1251_channels[] = {
1267 { .hw_value = 1, .center_freq = 2412},
1268 { .hw_value = 2, .center_freq = 2417},
1269 { .hw_value = 3, .center_freq = 2422},
1270 { .hw_value = 4, .center_freq = 2427},
1271 { .hw_value = 5, .center_freq = 2432},
1272 { .hw_value = 6, .center_freq = 2437},
1273 { .hw_value = 7, .center_freq = 2442},
1274 { .hw_value = 8, .center_freq = 2447},
1275 { .hw_value = 9, .center_freq = 2452},
1276 { .hw_value = 10, .center_freq = 2457},
1277 { .hw_value = 11, .center_freq = 2462},
1278 { .hw_value = 12, .center_freq = 2467},
1279 { .hw_value = 13, .center_freq = 2472},
1280 };
1281
1282 /* can't be const, mac80211 writes to this */
1283 static struct ieee80211_supported_band wl1251_band_2ghz = {
1284 .channels = wl1251_channels,
1285 .n_channels = ARRAY_SIZE(wl1251_channels),
1286 .bitrates = wl1251_rates,
1287 .n_bitrates = ARRAY_SIZE(wl1251_rates),
1288 };
1289
1290 static const struct ieee80211_ops wl1251_ops = {
1291 .start = wl1251_op_start,
1292 .stop = wl1251_op_stop,
1293 .add_interface = wl1251_op_add_interface,
1294 .remove_interface = wl1251_op_remove_interface,
1295 .config = wl1251_op_config,
1296 .configure_filter = wl1251_op_configure_filter,
1297 .tx = wl1251_op_tx,
1298 .set_key = wl1251_op_set_key,
1299 .hw_scan = wl1251_op_hw_scan,
1300 .bss_info_changed = wl1251_op_bss_info_changed,
1301 .set_rts_threshold = wl1251_op_set_rts_threshold,
1302 };
1303
1304 static int wl1251_register_hw(struct wl1251 *wl)
1305 {
1306 int ret;
1307
1308 if (wl->mac80211_registered)
1309 return 0;
1310
1311 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1312
1313 ret = ieee80211_register_hw(wl->hw);
1314 if (ret < 0) {
1315 wl1251_error("unable to register mac80211 hw: %d", ret);
1316 return ret;
1317 }
1318
1319 wl->mac80211_registered = true;
1320
1321 wl1251_notice("loaded");
1322
1323 return 0;
1324 }
1325
1326 int wl1251_init_ieee80211(struct wl1251 *wl)
1327 {
1328 int ret;
1329
1330 /* The tx descriptor buffer and the TKIP space */
1331 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1332 + WL1251_TKIP_IV_SPACE;
1333
1334 /* unit us */
1335 /* FIXME: find a proper value */
1336 wl->hw->channel_change_time = 10000;
1337
1338 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1339 IEEE80211_HW_NOISE_DBM |
1340 IEEE80211_HW_SUPPORTS_PS |
1341 IEEE80211_HW_BEACON_FILTER;
1342
1343 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1344 wl->hw->wiphy->max_scan_ssids = 1;
1345 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1346
1347 ret = wl1251_register_hw(wl);
1348 if (ret)
1349 goto out;
1350
1351 wl1251_debugfs_init(wl);
1352 wl1251_notice("initialized");
1353
1354 ret = 0;
1355
1356 out:
1357 return ret;
1358 }
1359 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1360
1361 struct ieee80211_hw *wl1251_alloc_hw(void)
1362 {
1363 struct ieee80211_hw *hw;
1364 struct wl1251 *wl;
1365 int i;
1366 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1367
1368 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1369 if (!hw) {
1370 wl1251_error("could not alloc ieee80211_hw");
1371 return ERR_PTR(-ENOMEM);
1372 }
1373
1374 wl = hw->priv;
1375 memset(wl, 0, sizeof(*wl));
1376
1377 wl->hw = hw;
1378
1379 wl->data_in_count = 0;
1380
1381 skb_queue_head_init(&wl->tx_queue);
1382
1383 INIT_WORK(&wl->filter_work, wl1251_filter_work);
1384 INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1385 wl->channel = WL1251_DEFAULT_CHANNEL;
1386 wl->scanning = false;
1387 wl->default_key = 0;
1388 wl->listen_int = 1;
1389 wl->rx_counter = 0;
1390 wl->rx_handled = 0;
1391 wl->rx_current_buffer = 0;
1392 wl->rx_last_id = 0;
1393 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1394 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1395 wl->elp = false;
1396 wl->psm = 0;
1397 wl->psm_requested = false;
1398 wl->tx_queue_stopped = false;
1399 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1400 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1401 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1402 wl->vif = NULL;
1403
1404 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1405 wl->tx_frames[i] = NULL;
1406
1407 wl->next_tx_complete = 0;
1408
1409 INIT_WORK(&wl->irq_work, wl1251_irq_work);
1410 INIT_WORK(&wl->tx_work, wl1251_tx_work);
1411
1412 /*
1413 * In case our MAC address is not correctly set,
1414 * we use a random but Nokia MAC.
1415 */
1416 memcpy(wl->mac_addr, nokia_oui, 3);
1417 get_random_bytes(wl->mac_addr + 3, 3);
1418
1419 wl->state = WL1251_STATE_OFF;
1420 mutex_init(&wl->mutex);
1421
1422 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1423 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1424
1425 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1426 if (!wl->rx_descriptor) {
1427 wl1251_error("could not allocate memory for rx descriptor");
1428 ieee80211_free_hw(hw);
1429 return ERR_PTR(-ENOMEM);
1430 }
1431
1432 return hw;
1433 }
1434 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1435
1436 int wl1251_free_hw(struct wl1251 *wl)
1437 {
1438 ieee80211_unregister_hw(wl->hw);
1439
1440 wl1251_debugfs_exit(wl);
1441
1442 kfree(wl->target_mem_map);
1443 kfree(wl->data_path);
1444 vfree(wl->fw);
1445 wl->fw = NULL;
1446 kfree(wl->nvs);
1447 wl->nvs = NULL;
1448
1449 kfree(wl->rx_descriptor);
1450 wl->rx_descriptor = NULL;
1451
1452 ieee80211_free_hw(wl->hw);
1453
1454 return 0;
1455 }
1456 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1457
1458 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1459 MODULE_LICENSE("GPL");
1460 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1461 MODULE_ALIAS("spi:wl1251");
1462 MODULE_FIRMWARE(WL1251_FW_NAME);
AMDTP streaming driver for the Linux FireWire stack (Juju)