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wl12xx: fix rx descriptor use
[linux-2.6/kvm.git] / drivers / net / wireless / wl12xx / main.c
blob3c6cd774192ddbd0ba2712e9f630ad9adb4cef9e
1 /*
2 * This file is part of wl12xx
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/spi/spi.h>
30 #include <linux/crc32.h>
31 #include <linux/etherdevice.h>
32 #include <linux/spi/wl12xx.h>
33
34 #include "wl12xx.h"
35 #include "wl12xx_80211.h"
36 #include "reg.h"
37 #include "wl1251.h"
38 #include "spi.h"
39 #include "event.h"
40 #include "tx.h"
41 #include "rx.h"
42 #include "ps.h"
43 #include "init.h"
44 #include "debugfs.h"
45
46 static void wl12xx_disable_interrupts(struct wl12xx *wl)
47 {
48 disable_irq(wl->irq);
49 }
50
51 static void wl12xx_power_off(struct wl12xx *wl)
52 {
53 wl->set_power(false);
54 }
55
56 static void wl12xx_power_on(struct wl12xx *wl)
57 {
58 wl->set_power(true);
59 }
60
61 static irqreturn_t wl12xx_irq(int irq, void *cookie)
62 {
63 struct wl12xx *wl;
64
65 wl12xx_debug(DEBUG_IRQ, "IRQ");
66
67 wl = cookie;
68
69 schedule_work(&wl->irq_work);
70
71 return IRQ_HANDLED;
72 }
73
74 static int wl12xx_fetch_firmware(struct wl12xx *wl)
75 {
76 const struct firmware *fw;
77 int ret;
78
79 ret = request_firmware(&fw, wl->chip.fw_filename, &wl->spi->dev);
80
81 if (ret < 0) {
82 wl12xx_error("could not get firmware: %d", ret);
83 return ret;
84 }
85
86 if (fw->size % 4) {
87 wl12xx_error("firmware size is not multiple of 32 bits: %zu",
88 fw->size);
89 ret = -EILSEQ;
90 goto out;
91 }
92
93 wl->fw_len = fw->size;
94 wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
95
96 if (!wl->fw) {
97 wl12xx_error("could not allocate memory for the firmware");
98 ret = -ENOMEM;
99 goto out;
100 }
101
102 memcpy(wl->fw, fw->data, wl->fw_len);
103
104 ret = 0;
105
106 out:
107 release_firmware(fw);
108
109 return ret;
110 }
111
112 static int wl12xx_fetch_nvs(struct wl12xx *wl)
113 {
114 const struct firmware *fw;
115 int ret;
116
117 ret = request_firmware(&fw, wl->chip.nvs_filename, &wl->spi->dev);
118
119 if (ret < 0) {
120 wl12xx_error("could not get nvs file: %d", ret);
121 return ret;
122 }
123
124 if (fw->size % 4) {
125 wl12xx_error("nvs size is not multiple of 32 bits: %zu",
126 fw->size);
127 ret = -EILSEQ;
128 goto out;
129 }
130
131 wl->nvs_len = fw->size;
132 wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
133
134 if (!wl->nvs) {
135 wl12xx_error("could not allocate memory for the nvs file");
136 ret = -ENOMEM;
137 goto out;
138 }
139
140 memcpy(wl->nvs, fw->data, wl->nvs_len);
141
142 ret = 0;
143
144 out:
145 release_firmware(fw);
146
147 return ret;
148 }
149
150 static void wl12xx_fw_wakeup(struct wl12xx *wl)
151 {
152 u32 elp_reg;
153
154 elp_reg = ELPCTRL_WAKE_UP;
155 wl12xx_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
156 elp_reg = wl12xx_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
157
158 if (!(elp_reg & ELPCTRL_WLAN_READY)) {
159 wl12xx_warning("WLAN not ready");
160 elp_reg = ELPCTRL_WAKE_UP_WLAN_READY;
161 wl12xx_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
162 }
163 }
164
165 static int wl12xx_chip_wakeup(struct wl12xx *wl)
166 {
167 int ret = 0;
168
169 wl12xx_power_on(wl);
170 msleep(wl->chip.power_on_sleep);
171 wl12xx_spi_reset(wl);
172 wl12xx_spi_init(wl);
173
174 /* We don't need a real memory partition here, because we only want
175 * to use the registers at this point. */
176 wl12xx_set_partition(wl,
177 0x00000000,
178 0x00000000,
179 REGISTERS_BASE,
180 REGISTERS_DOWN_SIZE);
181
182 /* ELP module wake up */
183 wl12xx_fw_wakeup(wl);
184
185 /* whal_FwCtrl_BootSm() */
186
187 /* 0. read chip id from CHIP_ID */
188 wl->chip.id = wl12xx_reg_read32(wl, CHIP_ID_B);
189
190 /* 1. check if chip id is valid */
191
192 switch (wl->chip.id) {
193 case CHIP_ID_1251_PG12:
194 wl12xx_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
195 wl->chip.id);
196
197 wl1251_setup(wl);
198
199 break;
200 case CHIP_ID_1271_PG10:
201 case CHIP_ID_1251_PG10:
202 case CHIP_ID_1251_PG11:
203 default:
204 wl12xx_error("unsupported chip id: 0x%x", wl->chip.id);
205 ret = -ENODEV;
206 goto out;
207 }
208
209 if (wl->fw == NULL) {
210 ret = wl12xx_fetch_firmware(wl);
211 if (ret < 0)
212 goto out;
213 }
214
215 /* No NVS from netlink, try to get it from the filesystem */
216 if (wl->nvs == NULL) {
217 ret = wl12xx_fetch_nvs(wl);
218 if (ret < 0)
219 goto out;
220 }
221
222 out:
223 return ret;
224 }
225
226 static void wl12xx_filter_work(struct work_struct *work)
227 {
228 struct wl12xx *wl =
229 container_of(work, struct wl12xx, filter_work);
230 int ret;
231
232 mutex_lock(&wl->mutex);
233
234 if (wl->state == WL12XX_STATE_OFF)
235 goto out;
236
237 ret = wl12xx_cmd_join(wl, wl->bss_type, 1, 100, 0);
238 if (ret < 0)
239 goto out;
240
241 out:
242 mutex_unlock(&wl->mutex);
243 }
244
245 int wl12xx_plt_start(struct wl12xx *wl)
246 {
247 int ret;
248
249 wl12xx_notice("power up");
250
251 if (wl->state != WL12XX_STATE_OFF) {
252 wl12xx_error("cannot go into PLT state because not "
253 "in off state: %d", wl->state);
254 return -EBUSY;
255 }
256
257 wl->state = WL12XX_STATE_PLT;
258
259 ret = wl12xx_chip_wakeup(wl);
260 if (ret < 0)
261 return ret;
262
263 ret = wl->chip.op_boot(wl);
264 if (ret < 0)
265 return ret;
266
267 wl12xx_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
268
269 ret = wl->chip.op_plt_init(wl);
270 if (ret < 0)
271 return ret;
272
273 return 0;
274 }
275
276 int wl12xx_plt_stop(struct wl12xx *wl)
277 {
278 wl12xx_notice("power down");
279
280 if (wl->state != WL12XX_STATE_PLT) {
281 wl12xx_error("cannot power down because not in PLT "
282 "state: %d", wl->state);
283 return -EBUSY;
284 }
285
286 wl12xx_disable_interrupts(wl);
287 wl12xx_power_off(wl);
288
289 wl->state = WL12XX_STATE_OFF;
290
291 return 0;
292 }
293
294
295 static int wl12xx_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
296 {
297 struct wl12xx *wl = hw->priv;
298
299 skb_queue_tail(&wl->tx_queue, skb);
300
301 schedule_work(&wl->tx_work);
302
303 /*
304 * The workqueue is slow to process the tx_queue and we need stop
305 * the queue here, otherwise the queue will get too long.
306 */
307 if (skb_queue_len(&wl->tx_queue) >= WL12XX_TX_QUEUE_MAX_LENGTH) {
308 ieee80211_stop_queues(wl->hw);
309
310 /*
311 * FIXME: this is racy, the variable is not properly
312 * protected. Maybe fix this by removing the stupid
313 * variable altogether and checking the real queue state?
314 */
315 wl->tx_queue_stopped = true;
316 }
317
318 return NETDEV_TX_OK;
319 }
320
321 static int wl12xx_op_start(struct ieee80211_hw *hw)
322 {
323 struct wl12xx *wl = hw->priv;
324 int ret = 0;
325
326 wl12xx_debug(DEBUG_MAC80211, "mac80211 start");
327
328 mutex_lock(&wl->mutex);
329
330 if (wl->state != WL12XX_STATE_OFF) {
331 wl12xx_error("cannot start because not in off state: %d",
332 wl->state);
333 ret = -EBUSY;
334 goto out;
335 }
336
337 ret = wl12xx_chip_wakeup(wl);
338 if (ret < 0)
339 return ret;
340
341 ret = wl->chip.op_boot(wl);
342 if (ret < 0)
343 goto out;
344
345 ret = wl->chip.op_hw_init(wl);
346 if (ret < 0)
347 goto out;
348
349 ret = wl12xx_acx_station_id(wl);
350 if (ret < 0)
351 goto out;
352
353 wl->state = WL12XX_STATE_ON;
354
355 wl12xx_info("firmware booted (%s)", wl->chip.fw_ver);
356
357 out:
358 if (ret < 0)
359 wl12xx_power_off(wl);
360
361 mutex_unlock(&wl->mutex);
362
363 return ret;
364 }
365
366 static void wl12xx_op_stop(struct ieee80211_hw *hw)
367 {
368 struct wl12xx *wl = hw->priv;
369
370 wl12xx_info("down");
371
372 wl12xx_debug(DEBUG_MAC80211, "mac80211 stop");
373
374 mutex_lock(&wl->mutex);
375
376 WARN_ON(wl->state != WL12XX_STATE_ON);
377
378 if (wl->scanning) {
379 mutex_unlock(&wl->mutex);
380 ieee80211_scan_completed(wl->hw, true);
381 mutex_lock(&wl->mutex);
382 wl->scanning = false;
383 }
384
385 wl->state = WL12XX_STATE_OFF;
386
387 wl12xx_disable_interrupts(wl);
388
389 mutex_unlock(&wl->mutex);
390
391 cancel_work_sync(&wl->irq_work);
392 cancel_work_sync(&wl->tx_work);
393 cancel_work_sync(&wl->filter_work);
394
395 mutex_lock(&wl->mutex);
396
397 /* let's notify MAC80211 about the remaining pending TX frames */
398 wl12xx_tx_flush(wl);
399
400 wl12xx_power_off(wl);
401
402 memset(wl->bssid, 0, ETH_ALEN);
403 wl->listen_int = 1;
404 wl->bss_type = MAX_BSS_TYPE;
405
406 wl->data_in_count = 0;
407 wl->rx_counter = 0;
408 wl->rx_handled = 0;
409 wl->rx_current_buffer = 0;
410 wl->rx_last_id = 0;
411 wl->next_tx_complete = 0;
412 wl->elp = false;
413 wl->psm = 0;
414 wl->tx_queue_stopped = false;
415 wl->power_level = WL12XX_DEFAULT_POWER_LEVEL;
416
417 wl12xx_debugfs_reset(wl);
418
419 mutex_unlock(&wl->mutex);
420 }
421
422 static int wl12xx_op_add_interface(struct ieee80211_hw *hw,
423 struct ieee80211_if_init_conf *conf)
424 {
425 struct wl12xx *wl = hw->priv;
426 DECLARE_MAC_BUF(mac);
427 int ret = 0;
428
429 wl12xx_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %s",
430 conf->type, print_mac(mac, conf->mac_addr));
431
432 mutex_lock(&wl->mutex);
433
434 switch (conf->type) {
435 case NL80211_IFTYPE_STATION:
436 wl->bss_type = BSS_TYPE_STA_BSS;
437 break;
438 case NL80211_IFTYPE_ADHOC:
439 wl->bss_type = BSS_TYPE_IBSS;
440 break;
441 default:
442 ret = -EOPNOTSUPP;
443 goto out;
444 }
445
446 if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
447 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
448 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
449 ret = wl12xx_acx_station_id(wl);
450 if (ret < 0)
451 goto out;
452 }
453
454 out:
455 mutex_unlock(&wl->mutex);
456 return ret;
457 }
458
459 static void wl12xx_op_remove_interface(struct ieee80211_hw *hw,
460 struct ieee80211_if_init_conf *conf)
461 {
462 wl12xx_debug(DEBUG_MAC80211, "mac80211 remove interface");
463 }
464
465 static int wl12xx_build_null_data(struct wl12xx *wl)
466 {
467 struct wl12xx_null_data_template template;
468
469 if (!is_zero_ether_addr(wl->bssid)) {
470 memcpy(template.header.da, wl->bssid, ETH_ALEN);
471 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
472 } else {
473 memset(template.header.da, 0xff, ETH_ALEN);
474 memset(template.header.bssid, 0xff, ETH_ALEN);
475 }
476
477 memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
478 template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
479 IEEE80211_STYPE_NULLFUNC);
480
481 return wl12xx_cmd_template_set(wl, CMD_NULL_DATA, &template,
482 sizeof(template));
483
484 }
485
486 static int wl12xx_build_ps_poll(struct wl12xx *wl, u16 aid)
487 {
488 struct wl12xx_ps_poll_template template;
489
490 memcpy(template.bssid, wl->bssid, ETH_ALEN);
491 memcpy(template.ta, wl->mac_addr, ETH_ALEN);
492 template.aid = aid;
493 template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
494
495 return wl12xx_cmd_template_set(wl, CMD_PS_POLL, &template,
496 sizeof(template));
497
498 }
499
500 static int wl12xx_op_config(struct ieee80211_hw *hw, u32 changed)
501 {
502 struct wl12xx *wl = hw->priv;
503 struct ieee80211_conf *conf = &hw->conf;
504 int channel, ret = 0;
505
506 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
507
508 wl12xx_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
509 channel,
510 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
511 conf->power_level);
512
513 mutex_lock(&wl->mutex);
514
515 if (channel != wl->channel) {
516 /* FIXME: use beacon interval provided by mac80211 */
517 ret = wl12xx_cmd_join(wl, wl->bss_type, 1, 100, 0);
518 if (ret < 0)
519 goto out;
520
521 wl->channel = channel;
522 }
523
524 ret = wl12xx_build_null_data(wl);
525 if (ret < 0)
526 goto out;
527
528 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
529 wl12xx_info("psm enabled");
530
531 wl->psm_requested = true;
532
533 /*
534 * We enter PSM only if we're already associated.
535 * If we're not, we'll enter it when joining an SSID,
536 * through the bss_info_changed() hook.
537 */
538 ret = wl12xx_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
539 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
540 wl->psm_requested) {
541 wl12xx_info("psm disabled");
542
543 wl->psm_requested = false;
544
545 if (wl->psm)
546 ret = wl12xx_ps_set_mode(wl, STATION_ACTIVE_MODE);
547 }
548
549 if (conf->power_level != wl->power_level) {
550 ret = wl12xx_acx_tx_power(wl, conf->power_level);
551 if (ret < 0)
552 goto out;
553
554 wl->power_level = conf->power_level;
555 }
556
557 out:
558 mutex_unlock(&wl->mutex);
559 return ret;
560 }
561
562 #define WL12XX_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
563 FIF_ALLMULTI | \
564 FIF_FCSFAIL | \
565 FIF_BCN_PRBRESP_PROMISC | \
566 FIF_CONTROL | \
567 FIF_OTHER_BSS)
568
569 static void wl12xx_op_configure_filter(struct ieee80211_hw *hw,
570 unsigned int changed,
571 unsigned int *total,
572 int mc_count,
573 struct dev_addr_list *mc_list)
574 {
575 struct wl12xx *wl = hw->priv;
576
577 wl12xx_debug(DEBUG_MAC80211, "mac80211 configure filter");
578
579 *total &= WL12XX_SUPPORTED_FILTERS;
580 changed &= WL12XX_SUPPORTED_FILTERS;
581
582 if (changed == 0)
583 /* no filters which we support changed */
584 return;
585
586 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
587
588 wl->rx_config = WL12XX_DEFAULT_RX_CONFIG;
589 wl->rx_filter = WL12XX_DEFAULT_RX_FILTER;
590
591 if (*total & FIF_PROMISC_IN_BSS) {
592 wl->rx_config |= CFG_BSSID_FILTER_EN;
593 wl->rx_config |= CFG_RX_ALL_GOOD;
594 }
595 if (*total & FIF_ALLMULTI)
596 /*
597 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
598 * all multicast frames
599 */
600 wl->rx_config &= ~CFG_MC_FILTER_EN;
601 if (*total & FIF_FCSFAIL)
602 wl->rx_filter |= CFG_RX_FCS_ERROR;
603 if (*total & FIF_BCN_PRBRESP_PROMISC) {
604 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
605 wl->rx_config &= ~CFG_SSID_FILTER_EN;
606 }
607 if (*total & FIF_CONTROL)
608 wl->rx_filter |= CFG_RX_CTL_EN;
609 if (*total & FIF_OTHER_BSS)
610 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
611
612 /*
613 * FIXME: workqueues need to be properly cancelled on stop(), for
614 * now let's just disable changing the filter settings. They will
615 * be updated any on config().
616 */
617 /* schedule_work(&wl->filter_work); */
618 }
619
620 /* HW encryption */
621 static int wl12xx_set_key_type(struct wl12xx *wl,
622 struct wl12xx_cmd_set_keys *key,
623 enum set_key_cmd cmd,
624 struct ieee80211_key_conf *mac80211_key,
625 const u8 *addr)
626 {
627 switch (mac80211_key->alg) {
628 case ALG_WEP:
629 if (is_broadcast_ether_addr(addr))
630 key->key_type = KEY_WEP_DEFAULT;
631 else
632 key->key_type = KEY_WEP_ADDR;
633
634 mac80211_key->hw_key_idx = mac80211_key->keyidx;
635 break;
636 case ALG_TKIP:
637 if (is_broadcast_ether_addr(addr))
638 key->key_type = KEY_TKIP_MIC_GROUP;
639 else
640 key->key_type = KEY_TKIP_MIC_PAIRWISE;
641
642 mac80211_key->hw_key_idx = mac80211_key->keyidx;
643 break;
644 case ALG_CCMP:
645 if (is_broadcast_ether_addr(addr))
646 key->key_type = KEY_AES_GROUP;
647 else
648 key->key_type = KEY_AES_PAIRWISE;
649 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
650 break;
651 default:
652 wl12xx_error("Unknown key algo 0x%x", mac80211_key->alg);
653 return -EOPNOTSUPP;
654 }
655
656 return 0;
657 }
658
659 static int wl12xx_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
660 struct ieee80211_vif *vif,
661 struct ieee80211_sta *sta,
662 struct ieee80211_key_conf *key)
663 {
664 struct wl12xx *wl = hw->priv;
665 struct wl12xx_cmd_set_keys *wl_cmd;
666 const u8 *addr;
667 int ret;
668
669 static const u8 bcast_addr[ETH_ALEN] =
670 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
671
672 wl12xx_debug(DEBUG_MAC80211, "mac80211 set key");
673
674 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
675 if (!wl_cmd) {
676 ret = -ENOMEM;
677 goto out;
678 }
679
680 addr = sta ? sta->addr : bcast_addr;
681
682 wl12xx_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
683 wl12xx_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
684 wl12xx_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
685 key->alg, key->keyidx, key->keylen, key->flags);
686 wl12xx_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
687
688 if (is_zero_ether_addr(addr)) {
689 /* We dont support TX only encryption */
690 ret = -EOPNOTSUPP;
691 goto out;
692 }
693
694 mutex_lock(&wl->mutex);
695
696 switch (cmd) {
697 case SET_KEY:
698 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
699 break;
700 case DISABLE_KEY:
701 wl_cmd->key_action = KEY_REMOVE;
702 break;
703 default:
704 wl12xx_error("Unsupported key cmd 0x%x", cmd);
705 break;
706 }
707
708 ret = wl12xx_set_key_type(wl, wl_cmd, cmd, key, addr);
709 if (ret < 0) {
710 wl12xx_error("Set KEY type failed");
711 goto out_unlock;
712 }
713
714 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
715 memcpy(wl_cmd->addr, addr, ETH_ALEN);
716
717 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
718 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
719 /*
720 * We get the key in the following form:
721 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
722 * but the target is expecting:
723 * TKIP - RX MIC - TX MIC
724 */
725 memcpy(wl_cmd->key, key->key, 16);
726 memcpy(wl_cmd->key + 16, key->key + 24, 8);
727 memcpy(wl_cmd->key + 24, key->key + 16, 8);
728
729 } else {
730 memcpy(wl_cmd->key, key->key, key->keylen);
731 }
732 wl_cmd->key_size = key->keylen;
733
734 wl_cmd->id = key->keyidx;
735 wl_cmd->ssid_profile = 0;
736
737 wl12xx_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
738
739 ret = wl12xx_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
740 if (ret < 0) {
741 wl12xx_warning("could not set keys");
742 goto out_unlock;
743 }
744
745 out_unlock:
746 mutex_unlock(&wl->mutex);
747
748 out:
749 kfree(wl_cmd);
750
751 return ret;
752 }
753
754 static int wl12xx_build_basic_rates(char *rates)
755 {
756 u8 index = 0;
757
758 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
759 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
760 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
761 rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
762
763 return index;
764 }
765
766 static int wl12xx_build_extended_rates(char *rates)
767 {
768 u8 index = 0;
769
770 rates[index++] = IEEE80211_OFDM_RATE_6MB;
771 rates[index++] = IEEE80211_OFDM_RATE_9MB;
772 rates[index++] = IEEE80211_OFDM_RATE_12MB;
773 rates[index++] = IEEE80211_OFDM_RATE_18MB;
774 rates[index++] = IEEE80211_OFDM_RATE_24MB;
775 rates[index++] = IEEE80211_OFDM_RATE_36MB;
776 rates[index++] = IEEE80211_OFDM_RATE_48MB;
777 rates[index++] = IEEE80211_OFDM_RATE_54MB;
778
779 return index;
780 }
781
782
783 static int wl12xx_build_probe_req(struct wl12xx *wl, u8 *ssid, size_t ssid_len)
784 {
785 struct wl12xx_probe_req_template template;
786 struct wl12xx_ie_rates *rates;
787 char *ptr;
788 u16 size;
789
790 ptr = (char *)&template;
791 size = sizeof(struct ieee80211_header);
792
793 memset(template.header.da, 0xff, ETH_ALEN);
794 memset(template.header.bssid, 0xff, ETH_ALEN);
795 memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
796 template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
797
798 /* IEs */
799 /* SSID */
800 template.ssid.header.id = WLAN_EID_SSID;
801 template.ssid.header.len = ssid_len;
802 if (ssid_len && ssid)
803 memcpy(template.ssid.ssid, ssid, ssid_len);
804 size += sizeof(struct wl12xx_ie_header) + ssid_len;
805 ptr += size;
806
807 /* Basic Rates */
808 rates = (struct wl12xx_ie_rates *)ptr;
809 rates->header.id = WLAN_EID_SUPP_RATES;
810 rates->header.len = wl12xx_build_basic_rates(rates->rates);
811 size += sizeof(struct wl12xx_ie_header) + rates->header.len;
812 ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
813
814 /* Extended rates */
815 rates = (struct wl12xx_ie_rates *)ptr;
816 rates->header.id = WLAN_EID_EXT_SUPP_RATES;
817 rates->header.len = wl12xx_build_extended_rates(rates->rates);
818 size += sizeof(struct wl12xx_ie_header) + rates->header.len;
819
820 wl12xx_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
821
822 return wl12xx_cmd_template_set(wl, CMD_PROBE_REQ, &template,
823 size);
824 }
825
826 static int wl12xx_hw_scan(struct wl12xx *wl, u8 *ssid, size_t len,
827 u8 active_scan, u8 high_prio, u8 num_channels,
828 u8 probe_requests)
829 {
830 struct wl12xx_cmd_trigger_scan_to *trigger = NULL;
831 struct cmd_scan *params = NULL;
832 int i, ret;
833 u16 scan_options = 0;
834
835 if (wl->scanning)
836 return -EINVAL;
837
838 params = kzalloc(sizeof(*params), GFP_KERNEL);
839 if (!params)
840 return -ENOMEM;
841
842 params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
843 params->params.rx_filter_options =
844 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
845
846 /* High priority scan */
847 if (!active_scan)
848 scan_options |= SCAN_PASSIVE;
849 if (high_prio)
850 scan_options |= SCAN_PRIORITY_HIGH;
851 params->params.scan_options = scan_options;
852
853 params->params.num_channels = num_channels;
854 params->params.num_probe_requests = probe_requests;
855 params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
856 params->params.tid_trigger = 0;
857
858 for (i = 0; i < num_channels; i++) {
859 params->channels[i].min_duration = cpu_to_le32(30000);
860 params->channels[i].max_duration = cpu_to_le32(60000);
861 memset(&params->channels[i].bssid_lsb, 0xff, 4);
862 memset(&params->channels[i].bssid_msb, 0xff, 2);
863 params->channels[i].early_termination = 0;
864 params->channels[i].tx_power_att = 0;
865 params->channels[i].channel = i + 1;
866 memset(params->channels[i].pad, 0, 3);
867 }
868
869 for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
870 memset(&params->channels[i], 0,
871 sizeof(struct basic_scan_channel_parameters));
872
873 if (len && ssid) {
874 params->params.ssid_len = len;
875 memcpy(params->params.ssid, ssid, len);
876 } else {
877 params->params.ssid_len = 0;
878 memset(params->params.ssid, 0, 32);
879 }
880
881 ret = wl12xx_build_probe_req(wl, ssid, len);
882 if (ret < 0) {
883 wl12xx_error("PROBE request template failed");
884 goto out;
885 }
886
887 trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
888 if (!trigger)
889 goto out;
890
891 trigger->timeout = 0;
892
893 ret = wl12xx_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
894 sizeof(*trigger));
895 if (ret < 0) {
896 wl12xx_error("trigger scan to failed for hw scan");
897 goto out;
898 }
899
900 wl12xx_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
901
902 wl->scanning = true;
903
904 ret = wl12xx_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
905 if (ret < 0)
906 wl12xx_error("SCAN failed");
907
908 wl12xx_spi_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
909
910 if (params->header.status != CMD_STATUS_SUCCESS) {
911 wl12xx_error("TEST command answer error: %d",
912 params->header.status);
913 wl->scanning = false;
914 ret = -EIO;
915 goto out;
916 }
917
918 out:
919 kfree(params);
920 return ret;
921
922 }
923
924 static int wl12xx_op_hw_scan(struct ieee80211_hw *hw,
925 struct cfg80211_scan_request *req)
926 {
927 struct wl12xx *wl = hw->priv;
928 int ret;
929 u8 *ssid = NULL;
930 size_t ssid_len = 0;
931
932 wl12xx_debug(DEBUG_MAC80211, "mac80211 hw scan");
933
934 if (req->n_ssids) {
935 ssid = req->ssids[0].ssid;
936 ssid_len = req->ssids[0].ssid_len;
937 }
938
939 mutex_lock(&wl->mutex);
940 ret = wl12xx_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
941 mutex_unlock(&wl->mutex);
942
943 return ret;
944 }
945
946 static int wl12xx_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
947 {
948 struct wl12xx *wl = hw->priv;
949 int ret;
950
951 ret = wl12xx_acx_rts_threshold(wl, (u16) value);
952
953 if (ret < 0)
954 wl12xx_warning("wl12xx_op_set_rts_threshold failed: %d", ret);
955
956 return ret;
957 }
958
959 static void wl12xx_op_bss_info_changed(struct ieee80211_hw *hw,
960 struct ieee80211_vif *vif,
961 struct ieee80211_bss_conf *bss_conf,
962 u32 changed)
963 {
964 enum wl12xx_cmd_ps_mode mode;
965 struct wl12xx *wl = hw->priv;
966 struct sk_buff *beacon;
967 int ret;
968
969 wl12xx_debug(DEBUG_MAC80211, "mac80211 bss info changed");
970
971 mutex_lock(&wl->mutex);
972
973 if (changed & BSS_CHANGED_ASSOC) {
974 if (bss_conf->assoc) {
975 wl->aid = bss_conf->aid;
976
977 ret = wl12xx_build_ps_poll(wl, wl->aid);
978 if (ret < 0)
979 goto out;
980
981 ret = wl12xx_acx_aid(wl, wl->aid);
982 if (ret < 0)
983 goto out;
984
985 /* If we want to go in PSM but we're not there yet */
986 if (wl->psm_requested && !wl->psm) {
987 mode = STATION_POWER_SAVE_MODE;
988 ret = wl12xx_ps_set_mode(wl, mode);
989 if (ret < 0)
990 goto out;
991 }
992 }
993 }
994 if (changed & BSS_CHANGED_ERP_SLOT) {
995 if (bss_conf->use_short_slot)
996 ret = wl12xx_acx_slot(wl, SLOT_TIME_SHORT);
997 else
998 ret = wl12xx_acx_slot(wl, SLOT_TIME_LONG);
999 if (ret < 0) {
1000 wl12xx_warning("Set slot time failed %d", ret);
1001 goto out;
1002 }
1003 }
1004
1005 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1006 if (bss_conf->use_short_preamble)
1007 wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1008 else
1009 wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1010 }
1011
1012 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1013 if (bss_conf->use_cts_prot)
1014 ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1015 else
1016 ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1017 if (ret < 0) {
1018 wl12xx_warning("Set ctsprotect failed %d", ret);
1019 goto out;
1020 }
1021 }
1022
1023 if (changed & BSS_CHANGED_BSSID) {
1024 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1025
1026 ret = wl12xx_build_null_data(wl);
1027 if (ret < 0)
1028 goto out;
1029
1030 if (wl->bss_type != BSS_TYPE_IBSS) {
1031 ret = wl12xx_cmd_join(wl, wl->bss_type, 5, 100, 1);
1032 if (ret < 0)
1033 goto out;
1034 }
1035 }
1036
1037 if (changed & BSS_CHANGED_BEACON) {
1038 beacon = ieee80211_beacon_get(hw, vif);
1039 ret = wl12xx_cmd_template_set(wl, CMD_BEACON, beacon->data,
1040 beacon->len);
1041
1042 if (ret < 0) {
1043 dev_kfree_skb(beacon);
1044 goto out;
1045 }
1046
1047 ret = wl12xx_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1048 beacon->len);
1049
1050 dev_kfree_skb(beacon);
1051
1052 if (ret < 0)
1053 goto out;
1054
1055 ret = wl12xx_cmd_join(wl, wl->bss_type, 1, 100, 0);
1056
1057 if (ret < 0)
1058 goto out;
1059 }
1060
1061 out:
1062 mutex_unlock(&wl->mutex);
1063 }
1064
1065
1066 /* can't be const, mac80211 writes to this */
1067 static struct ieee80211_rate wl12xx_rates[] = {
1068 { .bitrate = 10,
1069 .hw_value = 0x1,
1070 .hw_value_short = 0x1, },
1071 { .bitrate = 20,
1072 .hw_value = 0x2,
1073 .hw_value_short = 0x2,
1074 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1075 { .bitrate = 55,
1076 .hw_value = 0x4,
1077 .hw_value_short = 0x4,
1078 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1079 { .bitrate = 110,
1080 .hw_value = 0x20,
1081 .hw_value_short = 0x20,
1082 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1083 { .bitrate = 60,
1084 .hw_value = 0x8,
1085 .hw_value_short = 0x8, },
1086 { .bitrate = 90,
1087 .hw_value = 0x10,
1088 .hw_value_short = 0x10, },
1089 { .bitrate = 120,
1090 .hw_value = 0x40,
1091 .hw_value_short = 0x40, },
1092 { .bitrate = 180,
1093 .hw_value = 0x80,
1094 .hw_value_short = 0x80, },
1095 { .bitrate = 240,
1096 .hw_value = 0x200,
1097 .hw_value_short = 0x200, },
1098 { .bitrate = 360,
1099 .hw_value = 0x400,
1100 .hw_value_short = 0x400, },
1101 { .bitrate = 480,
1102 .hw_value = 0x800,
1103 .hw_value_short = 0x800, },
1104 { .bitrate = 540,
1105 .hw_value = 0x1000,
1106 .hw_value_short = 0x1000, },
1107 };
1108
1109 /* can't be const, mac80211 writes to this */
1110 static struct ieee80211_channel wl12xx_channels[] = {
1111 { .hw_value = 1, .center_freq = 2412},
1112 { .hw_value = 2, .center_freq = 2417},
1113 { .hw_value = 3, .center_freq = 2422},
1114 { .hw_value = 4, .center_freq = 2427},
1115 { .hw_value = 5, .center_freq = 2432},
1116 { .hw_value = 6, .center_freq = 2437},
1117 { .hw_value = 7, .center_freq = 2442},
1118 { .hw_value = 8, .center_freq = 2447},
1119 { .hw_value = 9, .center_freq = 2452},
1120 { .hw_value = 10, .center_freq = 2457},
1121 { .hw_value = 11, .center_freq = 2462},
1122 { .hw_value = 12, .center_freq = 2467},
1123 { .hw_value = 13, .center_freq = 2472},
1124 };
1125
1126 /* can't be const, mac80211 writes to this */
1127 static struct ieee80211_supported_band wl12xx_band_2ghz = {
1128 .channels = wl12xx_channels,
1129 .n_channels = ARRAY_SIZE(wl12xx_channels),
1130 .bitrates = wl12xx_rates,
1131 .n_bitrates = ARRAY_SIZE(wl12xx_rates),
1132 };
1133
1134 static const struct ieee80211_ops wl12xx_ops = {
1135 .start = wl12xx_op_start,
1136 .stop = wl12xx_op_stop,
1137 .add_interface = wl12xx_op_add_interface,
1138 .remove_interface = wl12xx_op_remove_interface,
1139 .config = wl12xx_op_config,
1140 .configure_filter = wl12xx_op_configure_filter,
1141 .tx = wl12xx_op_tx,
1142 .set_key = wl12xx_op_set_key,
1143 .hw_scan = wl12xx_op_hw_scan,
1144 .bss_info_changed = wl12xx_op_bss_info_changed,
1145 .set_rts_threshold = wl12xx_op_set_rts_threshold,
1146 };
1147
1148 static int wl12xx_register_hw(struct wl12xx *wl)
1149 {
1150 int ret;
1151
1152 if (wl->mac80211_registered)
1153 return 0;
1154
1155 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1156
1157 ret = ieee80211_register_hw(wl->hw);
1158 if (ret < 0) {
1159 wl12xx_error("unable to register mac80211 hw: %d", ret);
1160 return ret;
1161 }
1162
1163 wl->mac80211_registered = true;
1164
1165 wl12xx_notice("loaded");
1166
1167 return 0;
1168 }
1169
1170 static int wl12xx_init_ieee80211(struct wl12xx *wl)
1171 {
1172 /* The tx descriptor buffer and the TKIP space */
1173 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1174 + WL12XX_TKIP_IV_SPACE;
1175
1176 /* unit us */
1177 /* FIXME: find a proper value */
1178 wl->hw->channel_change_time = 10000;
1179
1180 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1181 IEEE80211_HW_NOISE_DBM;
1182
1183 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1184 wl->hw->wiphy->max_scan_ssids = 1;
1185 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl12xx_band_2ghz;
1186
1187 SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1188
1189 return 0;
1190 }
1191
1192 #define WL12XX_DEFAULT_CHANNEL 1
1193 static int __devinit wl12xx_probe(struct spi_device *spi)
1194 {
1195 struct wl12xx_platform_data *pdata;
1196 struct ieee80211_hw *hw;
1197 struct wl12xx *wl;
1198 int ret, i;
1199 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1200
1201 pdata = spi->dev.platform_data;
1202 if (!pdata) {
1203 wl12xx_error("no platform data");
1204 return -ENODEV;
1205 }
1206
1207 hw = ieee80211_alloc_hw(sizeof(*wl), &wl12xx_ops);
1208 if (!hw) {
1209 wl12xx_error("could not alloc ieee80211_hw");
1210 return -ENOMEM;
1211 }
1212
1213 wl = hw->priv;
1214 memset(wl, 0, sizeof(*wl));
1215
1216 wl->hw = hw;
1217 dev_set_drvdata(&spi->dev, wl);
1218 wl->spi = spi;
1219
1220 wl->data_in_count = 0;
1221
1222 skb_queue_head_init(&wl->tx_queue);
1223
1224 INIT_WORK(&wl->tx_work, wl12xx_tx_work);
1225 INIT_WORK(&wl->filter_work, wl12xx_filter_work);
1226 wl->channel = WL12XX_DEFAULT_CHANNEL;
1227 wl->scanning = false;
1228 wl->default_key = 0;
1229 wl->listen_int = 1;
1230 wl->rx_counter = 0;
1231 wl->rx_handled = 0;
1232 wl->rx_current_buffer = 0;
1233 wl->rx_last_id = 0;
1234 wl->rx_config = WL12XX_DEFAULT_RX_CONFIG;
1235 wl->rx_filter = WL12XX_DEFAULT_RX_FILTER;
1236 wl->elp = false;
1237 wl->psm = 0;
1238 wl->psm_requested = false;
1239 wl->tx_queue_stopped = false;
1240 wl->power_level = WL12XX_DEFAULT_POWER_LEVEL;
1241
1242 /* We use the default power on sleep time until we know which chip
1243 * we're using */
1244 wl->chip.power_on_sleep = WL12XX_DEFAULT_POWER_ON_SLEEP;
1245
1246 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1247 wl->tx_frames[i] = NULL;
1248
1249 wl->next_tx_complete = 0;
1250
1251 /*
1252 * In case our MAC address is not correctly set,
1253 * we use a random but Nokia MAC.
1254 */
1255 memcpy(wl->mac_addr, nokia_oui, 3);
1256 get_random_bytes(wl->mac_addr + 3, 3);
1257
1258 wl->state = WL12XX_STATE_OFF;
1259 mutex_init(&wl->mutex);
1260
1261 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1262 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1263
1264 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1265 if (!wl->rx_descriptor) {
1266 wl12xx_error("could not allocate memory for rx descriptor");
1267 ret = -ENOMEM;
1268 goto out_free;
1269 }
1270
1271 /* This is the only SPI value that we need to set here, the rest
1272 * comes from the board-peripherals file */
1273 spi->bits_per_word = 32;
1274
1275 ret = spi_setup(spi);
1276 if (ret < 0) {
1277 wl12xx_error("spi_setup failed");
1278 goto out_free;
1279 }
1280
1281 wl->set_power = pdata->set_power;
1282 if (!wl->set_power) {
1283 wl12xx_error("set power function missing in platform data");
1284 ret = -ENODEV;
1285 goto out_free;
1286 }
1287
1288 wl->irq = spi->irq;
1289 if (wl->irq < 0) {
1290 wl12xx_error("irq missing in platform data");
1291 ret = -ENODEV;
1292 goto out_free;
1293 }
1294
1295 ret = request_irq(wl->irq, wl12xx_irq, 0, DRIVER_NAME, wl);
1296 if (ret < 0) {
1297 wl12xx_error("request_irq() failed: %d", ret);
1298 goto out_free;
1299 }
1300
1301 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1302
1303 disable_irq(wl->irq);
1304
1305 ret = wl12xx_init_ieee80211(wl);
1306 if (ret)
1307 goto out_irq;
1308
1309 ret = wl12xx_register_hw(wl);
1310 if (ret)
1311 goto out_irq;
1312
1313 wl12xx_debugfs_init(wl);
1314
1315 wl12xx_notice("initialized");
1316
1317 return 0;
1318
1319 out_irq:
1320 free_irq(wl->irq, wl);
1321
1322 out_free:
1323 kfree(wl->rx_descriptor);
1324 wl->rx_descriptor = NULL;
1325
1326 ieee80211_free_hw(hw);
1327
1328 return ret;
1329 }
1330
1331 static int __devexit wl12xx_remove(struct spi_device *spi)
1332 {
1333 struct wl12xx *wl = dev_get_drvdata(&spi->dev);
1334
1335 ieee80211_unregister_hw(wl->hw);
1336
1337 wl12xx_debugfs_exit(wl);
1338
1339 free_irq(wl->irq, wl);
1340 kfree(wl->target_mem_map);
1341 kfree(wl->data_path);
1342 kfree(wl->fw);
1343 wl->fw = NULL;
1344 kfree(wl->nvs);
1345 wl->nvs = NULL;
1346
1347 kfree(wl->rx_descriptor);
1348 wl->rx_descriptor = NULL;
1349
1350 ieee80211_free_hw(wl->hw);
1351
1352 return 0;
1353 }
1354
1355
1356 static struct spi_driver wl12xx_spi_driver = {
1357 .driver = {
1358 .name = "wl12xx",
1359 .bus = &spi_bus_type,
1360 .owner = THIS_MODULE,
1361 },
1362
1363 .probe = wl12xx_probe,
1364 .remove = __devexit_p(wl12xx_remove),
1365 };
1366
1367 static int __init wl12xx_init(void)
1368 {
1369 int ret;
1370
1371 ret = spi_register_driver(&wl12xx_spi_driver);
1372 if (ret < 0) {
1373 wl12xx_error("failed to register spi driver: %d", ret);
1374 goto out;
1375 }
1376
1377 out:
1378 return ret;
1379 }
1380
1381 static void __exit wl12xx_exit(void)
1382 {
1383 spi_unregister_driver(&wl12xx_spi_driver);
1384
1385 wl12xx_notice("unloaded");
1386 }
1387
1388 module_init(wl12xx_init);
1389 module_exit(wl12xx_exit);
1390
1391 MODULE_LICENSE("GPL");
1392 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>, "
1393 "Luciano Coelho <luciano.coelho@nokia.com>");
kernel-based virtual machine