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4102d590b798566cda678d76987adf634726ecac
[deliverable/linux.git] / drivers / net / wireless / wl12xx / wl1271_main.c
1 /*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Contact: Luciano Coelho <luciano.coelho@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/platform_device.h>
26 #include <linux/interrupt.h>
27 #include <linux/firmware.h>
28 #include <linux/delay.h>
29 #include <linux/irq.h>
30 #include <linux/spi/spi.h>
31 #include <linux/crc32.h>
32 #include <linux/etherdevice.h>
33 #include <linux/spi/wl12xx.h>
34
35 #include "wl1271.h"
36 #include "wl12xx_80211.h"
37 #include "wl1271_reg.h"
38 #include "wl1271_spi.h"
39 #include "wl1271_event.h"
40 #include "wl1271_tx.h"
41 #include "wl1271_rx.h"
42 #include "wl1271_ps.h"
43 #include "wl1271_init.h"
44 #include "wl1271_debugfs.h"
45 #include "wl1271_cmd.h"
46 #include "wl1271_boot.h"
47
48 static int wl1271_plt_init(struct wl1271 *wl)
49 {
50 int ret;
51
52 ret = wl1271_acx_init_mem_config(wl);
53 if (ret < 0)
54 return ret;
55
56 ret = wl1271_cmd_data_path(wl, wl->channel, 1);
57 if (ret < 0)
58 return ret;
59
60 return 0;
61 }
62
63 static void wl1271_disable_interrupts(struct wl1271 *wl)
64 {
65 disable_irq(wl->irq);
66 }
67
68 static void wl1271_power_off(struct wl1271 *wl)
69 {
70 wl->set_power(false);
71 }
72
73 static void wl1271_power_on(struct wl1271 *wl)
74 {
75 wl->set_power(true);
76 }
77
78 static void wl1271_fw_status(struct wl1271 *wl, struct wl1271_fw_status *status)
79 {
80 u32 total = 0;
81 int i;
82
83 /*
84 * FIXME: Reading the FW status directly from the registers seems to
85 * be the right thing to do, but it doesn't work. And in the
86 * reference driver, there is a workaround called
87 * USE_SDIO_24M_WORKAROUND, which reads the status from memory
88 * instead, so we do the same here.
89 */
90
91 wl1271_spi_mem_read(wl, STATUS_MEM_ADDRESS, status, sizeof(*status));
92
93 wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
94 "drv_rx_counter = %d, tx_results_counter = %d)",
95 status->intr,
96 status->fw_rx_counter,
97 status->drv_rx_counter,
98 status->tx_results_counter);
99
100 /* update number of available TX blocks */
101 for (i = 0; i < NUM_TX_QUEUES; i++) {
102 u32 cnt = status->tx_released_blks[i] - wl->tx_blocks_freed[i];
103 wl->tx_blocks_freed[i] = status->tx_released_blks[i];
104 wl->tx_blocks_available += cnt;
105 total += cnt;
106 }
107
108 /* if more blocks are available now, schedule some tx work */
109 if (total && !skb_queue_empty(&wl->tx_queue))
110 schedule_work(&wl->tx_work);
111
112 /* update the host-chipset time offset */
113 wl->time_offset = jiffies_to_usecs(jiffies) - status->fw_localtime;
114 }
115
116 #define WL1271_IRQ_MAX_LOOPS 10
117 static void wl1271_irq_work(struct work_struct *work)
118 {
119 u32 intr, ctr = WL1271_IRQ_MAX_LOOPS;
120 int ret;
121 struct wl1271 *wl =
122 container_of(work, struct wl1271, irq_work);
123
124 mutex_lock(&wl->mutex);
125
126 wl1271_debug(DEBUG_IRQ, "IRQ work");
127
128 if (wl->state == WL1271_STATE_OFF)
129 goto out;
130
131 ret = wl1271_ps_elp_wakeup(wl, true);
132 if (ret < 0)
133 goto out;
134
135 wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
136
137 intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
138 if (!intr) {
139 wl1271_debug(DEBUG_IRQ, "Zero interrupt received.");
140 goto out_sleep;
141 }
142
143 intr &= WL1271_INTR_MASK;
144
145 do {
146 wl1271_fw_status(wl, wl->fw_status);
147
148
149 if (intr & (WL1271_ACX_INTR_EVENT_A |
150 WL1271_ACX_INTR_EVENT_B)) {
151 wl1271_debug(DEBUG_IRQ,
152 "WL1271_ACX_INTR_EVENT (0x%x)", intr);
153 if (intr & WL1271_ACX_INTR_EVENT_A)
154 wl1271_event_handle(wl, 0);
155 else
156 wl1271_event_handle(wl, 1);
157 }
158
159 if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
160 wl1271_debug(DEBUG_IRQ,
161 "WL1271_ACX_INTR_INIT_COMPLETE");
162
163 if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
164 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
165
166 if (intr & WL1271_ACX_INTR_DATA) {
167 u8 tx_res_cnt = wl->fw_status->tx_results_counter -
168 wl->tx_results_count;
169
170 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
171
172 /* check for tx results */
173 if (tx_res_cnt)
174 wl1271_tx_complete(wl, tx_res_cnt);
175
176 wl1271_rx(wl, wl->fw_status);
177 }
178
179 intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
180 intr &= WL1271_INTR_MASK;
181 } while (intr && --ctr);
182
183 out_sleep:
184 wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
185 WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
186 wl1271_ps_elp_sleep(wl);
187
188 out:
189 mutex_unlock(&wl->mutex);
190 }
191
192 static irqreturn_t wl1271_irq(int irq, void *cookie)
193 {
194 struct wl1271 *wl;
195 unsigned long flags;
196
197 wl1271_debug(DEBUG_IRQ, "IRQ");
198
199 wl = cookie;
200
201 /* complete the ELP completion */
202 spin_lock_irqsave(&wl->wl_lock, flags);
203 if (wl->elp_compl) {
204 complete(wl->elp_compl);
205 wl->elp_compl = NULL;
206 }
207
208 schedule_work(&wl->irq_work);
209 spin_unlock_irqrestore(&wl->wl_lock, flags);
210
211 return IRQ_HANDLED;
212 }
213
214 static int wl1271_fetch_firmware(struct wl1271 *wl)
215 {
216 const struct firmware *fw;
217 int ret;
218
219 ret = request_firmware(&fw, WL1271_FW_NAME, &wl->spi->dev);
220
221 if (ret < 0) {
222 wl1271_error("could not get firmware: %d", ret);
223 return ret;
224 }
225
226 if (fw->size % 4) {
227 wl1271_error("firmware size is not multiple of 32 bits: %zu",
228 fw->size);
229 ret = -EILSEQ;
230 goto out;
231 }
232
233 wl->fw_len = fw->size;
234 wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
235
236 if (!wl->fw) {
237 wl1271_error("could not allocate memory for the firmware");
238 ret = -ENOMEM;
239 goto out;
240 }
241
242 memcpy(wl->fw, fw->data, wl->fw_len);
243
244 ret = 0;
245
246 out:
247 release_firmware(fw);
248
249 return ret;
250 }
251
252 static int wl1271_fetch_nvs(struct wl1271 *wl)
253 {
254 const struct firmware *fw;
255 int ret;
256
257 ret = request_firmware(&fw, WL1271_NVS_NAME, &wl->spi->dev);
258
259 if (ret < 0) {
260 wl1271_error("could not get nvs file: %d", ret);
261 return ret;
262 }
263
264 if (fw->size % 4) {
265 wl1271_error("nvs size is not multiple of 32 bits: %zu",
266 fw->size);
267 ret = -EILSEQ;
268 goto out;
269 }
270
271 wl->nvs_len = fw->size;
272 wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
273
274 if (!wl->nvs) {
275 wl1271_error("could not allocate memory for the nvs file");
276 ret = -ENOMEM;
277 goto out;
278 }
279
280 memcpy(wl->nvs, fw->data, wl->nvs_len);
281
282 ret = 0;
283
284 out:
285 release_firmware(fw);
286
287 return ret;
288 }
289
290 static void wl1271_fw_wakeup(struct wl1271 *wl)
291 {
292 u32 elp_reg;
293
294 elp_reg = ELPCTRL_WAKE_UP;
295 wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
296 }
297
298 static int wl1271_setup(struct wl1271 *wl)
299 {
300 wl->fw_status = kmalloc(sizeof(*wl->fw_status), GFP_KERNEL);
301 if (!wl->fw_status)
302 return -ENOMEM;
303
304 wl->tx_res_if = kmalloc(sizeof(*wl->tx_res_if), GFP_KERNEL);
305 if (!wl->tx_res_if) {
306 kfree(wl->fw_status);
307 return -ENOMEM;
308 }
309
310 INIT_WORK(&wl->irq_work, wl1271_irq_work);
311 INIT_WORK(&wl->tx_work, wl1271_tx_work);
312 return 0;
313 }
314
315 static int wl1271_chip_wakeup(struct wl1271 *wl)
316 {
317 int ret = 0;
318
319 wl1271_power_on(wl);
320 msleep(WL1271_POWER_ON_SLEEP);
321 wl1271_spi_reset(wl);
322 wl1271_spi_init(wl);
323
324 /* We don't need a real memory partition here, because we only want
325 * to use the registers at this point. */
326 wl1271_set_partition(wl,
327 0x00000000,
328 0x00000000,
329 REGISTERS_BASE,
330 REGISTERS_DOWN_SIZE);
331
332 /* ELP module wake up */
333 wl1271_fw_wakeup(wl);
334
335 /* whal_FwCtrl_BootSm() */
336
337 /* 0. read chip id from CHIP_ID */
338 wl->chip.id = wl1271_reg_read32(wl, CHIP_ID_B);
339
340 /* 1. check if chip id is valid */
341
342 switch (wl->chip.id) {
343 case CHIP_ID_1271_PG10:
344 wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
345 wl->chip.id);
346
347 ret = wl1271_setup(wl);
348 if (ret < 0)
349 goto out;
350 break;
351 case CHIP_ID_1271_PG20:
352 wl1271_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
353 wl->chip.id);
354
355 ret = wl1271_setup(wl);
356 if (ret < 0)
357 goto out;
358 break;
359 default:
360 wl1271_error("unsupported chip id: 0x%x", wl->chip.id);
361 ret = -ENODEV;
362 goto out;
363 }
364
365 if (wl->fw == NULL) {
366 ret = wl1271_fetch_firmware(wl);
367 if (ret < 0)
368 goto out;
369 }
370
371 /* No NVS from netlink, try to get it from the filesystem */
372 if (wl->nvs == NULL) {
373 ret = wl1271_fetch_nvs(wl);
374 if (ret < 0)
375 goto out;
376 }
377
378 out:
379 return ret;
380 }
381
382 static void wl1271_filter_work(struct work_struct *work)
383 {
384 struct wl1271 *wl =
385 container_of(work, struct wl1271, filter_work);
386 int ret;
387
388 mutex_lock(&wl->mutex);
389
390 if (wl->state == WL1271_STATE_OFF)
391 goto out;
392
393 ret = wl1271_ps_elp_wakeup(wl, false);
394 if (ret < 0)
395 goto out;
396
397 /* FIXME: replace the magic numbers with proper definitions */
398 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
399 if (ret < 0)
400 goto out_sleep;
401
402 out_sleep:
403 wl1271_ps_elp_sleep(wl);
404
405 out:
406 mutex_unlock(&wl->mutex);
407 }
408
409 int wl1271_plt_start(struct wl1271 *wl)
410 {
411 int ret;
412
413 mutex_lock(&wl->mutex);
414
415 wl1271_notice("power up");
416
417 if (wl->state != WL1271_STATE_OFF) {
418 wl1271_error("cannot go into PLT state because not "
419 "in off state: %d", wl->state);
420 ret = -EBUSY;
421 goto out;
422 }
423
424 wl->state = WL1271_STATE_PLT;
425
426 ret = wl1271_chip_wakeup(wl);
427 if (ret < 0)
428 goto out;
429
430 ret = wl1271_boot(wl);
431 if (ret < 0)
432 goto out;
433
434 wl1271_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
435
436 ret = wl1271_plt_init(wl);
437 if (ret < 0)
438 goto out;
439
440 out:
441 mutex_unlock(&wl->mutex);
442
443 return ret;
444 }
445
446 int wl1271_plt_stop(struct wl1271 *wl)
447 {
448 int ret = 0;
449
450 mutex_lock(&wl->mutex);
451
452 wl1271_notice("power down");
453
454 if (wl->state != WL1271_STATE_PLT) {
455 wl1271_error("cannot power down because not in PLT "
456 "state: %d", wl->state);
457 ret = -EBUSY;
458 goto out;
459 }
460
461 wl1271_disable_interrupts(wl);
462 wl1271_power_off(wl);
463
464 wl->state = WL1271_STATE_OFF;
465
466 out:
467 mutex_unlock(&wl->mutex);
468
469 return ret;
470 }
471
472
473 static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
474 {
475 struct wl1271 *wl = hw->priv;
476
477 skb_queue_tail(&wl->tx_queue, skb);
478
479 /*
480 * The chip specific setup must run before the first TX packet -
481 * before that, the tx_work will not be initialized!
482 */
483
484 schedule_work(&wl->tx_work);
485
486 /*
487 * The workqueue is slow to process the tx_queue and we need stop
488 * the queue here, otherwise the queue will get too long.
489 */
490 if (skb_queue_len(&wl->tx_queue) >= WL1271_TX_QUEUE_MAX_LENGTH) {
491 ieee80211_stop_queues(wl->hw);
492
493 /*
494 * FIXME: this is racy, the variable is not properly
495 * protected. Maybe fix this by removing the stupid
496 * variable altogether and checking the real queue state?
497 */
498 wl->tx_queue_stopped = true;
499 }
500
501 return NETDEV_TX_OK;
502 }
503
504 static int wl1271_op_start(struct ieee80211_hw *hw)
505 {
506 struct wl1271 *wl = hw->priv;
507 int ret = 0;
508
509 wl1271_debug(DEBUG_MAC80211, "mac80211 start");
510
511 mutex_lock(&wl->mutex);
512
513 if (wl->state != WL1271_STATE_OFF) {
514 wl1271_error("cannot start because not in off state: %d",
515 wl->state);
516 ret = -EBUSY;
517 goto out;
518 }
519
520 ret = wl1271_chip_wakeup(wl);
521 if (ret < 0)
522 goto out;
523
524 ret = wl1271_boot(wl);
525 if (ret < 0)
526 goto out;
527
528 ret = wl1271_hw_init(wl);
529 if (ret < 0)
530 goto out;
531
532 wl->state = WL1271_STATE_ON;
533
534 wl1271_info("firmware booted (%s)", wl->chip.fw_ver);
535
536 out:
537 if (ret < 0)
538 wl1271_power_off(wl);
539
540 mutex_unlock(&wl->mutex);
541
542 return ret;
543 }
544
545 static void wl1271_op_stop(struct ieee80211_hw *hw)
546 {
547 struct wl1271 *wl = hw->priv;
548 int i;
549
550 wl1271_info("down");
551
552 wl1271_debug(DEBUG_MAC80211, "mac80211 stop");
553
554 mutex_lock(&wl->mutex);
555
556 WARN_ON(wl->state != WL1271_STATE_ON);
557
558 if (wl->scanning) {
559 mutex_unlock(&wl->mutex);
560 ieee80211_scan_completed(wl->hw, true);
561 mutex_lock(&wl->mutex);
562 wl->scanning = false;
563 }
564
565 wl->state = WL1271_STATE_OFF;
566
567 wl1271_disable_interrupts(wl);
568
569 mutex_unlock(&wl->mutex);
570
571 cancel_work_sync(&wl->irq_work);
572 cancel_work_sync(&wl->tx_work);
573 cancel_work_sync(&wl->filter_work);
574
575 mutex_lock(&wl->mutex);
576
577 /* let's notify MAC80211 about the remaining pending TX frames */
578 wl1271_tx_flush(wl);
579 wl1271_power_off(wl);
580
581 memset(wl->bssid, 0, ETH_ALEN);
582 memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
583 wl->ssid_len = 0;
584 wl->listen_int = 1;
585 wl->bss_type = MAX_BSS_TYPE;
586
587 wl->rx_counter = 0;
588 wl->elp = false;
589 wl->psm = 0;
590 wl->tx_queue_stopped = false;
591 wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
592 wl->tx_blocks_available = 0;
593 wl->tx_results_count = 0;
594 wl->tx_packets_count = 0;
595 wl->time_offset = 0;
596 wl->session_counter = 0;
597 for (i = 0; i < NUM_TX_QUEUES; i++)
598 wl->tx_blocks_freed[i] = 0;
599
600 wl1271_debugfs_reset(wl);
601 mutex_unlock(&wl->mutex);
602 }
603
604 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
605 struct ieee80211_if_init_conf *conf)
606 {
607 struct wl1271 *wl = hw->priv;
608 DECLARE_MAC_BUF(mac);
609 int ret = 0;
610
611 wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %s",
612 conf->type, print_mac(mac, conf->mac_addr));
613
614 mutex_lock(&wl->mutex);
615
616 switch (conf->type) {
617 case NL80211_IFTYPE_STATION:
618 wl->bss_type = BSS_TYPE_STA_BSS;
619 break;
620 case NL80211_IFTYPE_ADHOC:
621 wl->bss_type = BSS_TYPE_IBSS;
622 break;
623 default:
624 ret = -EOPNOTSUPP;
625 goto out;
626 }
627
628 /* FIXME: what if conf->mac_addr changes? */
629
630 out:
631 mutex_unlock(&wl->mutex);
632 return ret;
633 }
634
635 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
636 struct ieee80211_if_init_conf *conf)
637 {
638 wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
639 }
640
641 #if 0
642 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
643 struct ieee80211_vif *vif,
644 struct ieee80211_if_conf *conf)
645 {
646 struct wl1271 *wl = hw->priv;
647 struct sk_buff *beacon;
648 DECLARE_MAC_BUF(mac);
649 int ret;
650
651 wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %s",
652 print_mac(mac, conf->bssid));
653 wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
654 conf->ssid_len);
655
656 mutex_lock(&wl->mutex);
657
658 ret = wl1271_ps_elp_wakeup(wl, false);
659 if (ret < 0)
660 goto out;
661
662 memcpy(wl->bssid, conf->bssid, ETH_ALEN);
663
664 ret = wl1271_cmd_build_null_data(wl);
665 if (ret < 0)
666 goto out_sleep;
667
668 wl->ssid_len = conf->ssid_len;
669 if (wl->ssid_len)
670 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
671
672 if (wl->bss_type != BSS_TYPE_IBSS) {
673 /* FIXME: replace the magic numbers with proper definitions */
674 ret = wl1271_cmd_join(wl, wl->bss_type, 5, 100, 1);
675 if (ret < 0)
676 goto out_sleep;
677 }
678
679 if (conf->changed & IEEE80211_IFCC_BEACON) {
680 beacon = ieee80211_beacon_get(hw, vif);
681 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
682 beacon->data, beacon->len);
683
684 if (ret < 0) {
685 dev_kfree_skb(beacon);
686 goto out_sleep;
687 }
688
689 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
690 beacon->data, beacon->len);
691
692 dev_kfree_skb(beacon);
693
694 if (ret < 0)
695 goto out_sleep;
696
697 /* FIXME: replace the magic numbers with proper definitions */
698 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
699
700 if (ret < 0)
701 goto out_sleep;
702 }
703
704 out_sleep:
705 wl1271_ps_elp_sleep(wl);
706
707 out:
708 mutex_unlock(&wl->mutex);
709
710 return ret;
711 }
712 #endif
713
714 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
715 {
716 struct wl1271 *wl = hw->priv;
717 struct ieee80211_conf *conf = &hw->conf;
718 int channel, ret = 0;
719
720 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
721
722 wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
723 channel,
724 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
725 conf->power_level);
726
727 mutex_lock(&wl->mutex);
728
729 ret = wl1271_ps_elp_wakeup(wl, false);
730 if (ret < 0)
731 goto out;
732
733 if (channel != wl->channel) {
734 u8 old_channel = wl->channel;
735 wl->channel = channel;
736
737 /* FIXME: use beacon interval provided by mac80211 */
738 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
739 if (ret < 0) {
740 wl->channel = old_channel;
741 goto out_sleep;
742 }
743 }
744
745 ret = wl1271_cmd_build_null_data(wl);
746 if (ret < 0)
747 goto out_sleep;
748
749 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
750 wl1271_info("psm enabled");
751
752 wl->psm_requested = true;
753
754 /*
755 * We enter PSM only if we're already associated.
756 * If we're not, we'll enter it when joining an SSID,
757 * through the bss_info_changed() hook.
758 */
759 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
760 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
761 wl->psm_requested) {
762 wl1271_info("psm disabled");
763
764 wl->psm_requested = false;
765
766 if (wl->psm)
767 ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
768 }
769
770 if (conf->power_level != wl->power_level) {
771 ret = wl1271_acx_tx_power(wl, conf->power_level);
772 if (ret < 0)
773 goto out;
774
775 wl->power_level = conf->power_level;
776 }
777
778 out_sleep:
779 wl1271_ps_elp_sleep(wl);
780
781 out:
782 mutex_unlock(&wl->mutex);
783
784 return ret;
785 }
786
787 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
788 FIF_ALLMULTI | \
789 FIF_FCSFAIL | \
790 FIF_BCN_PRBRESP_PROMISC | \
791 FIF_CONTROL | \
792 FIF_OTHER_BSS)
793
794 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
795 unsigned int changed,
796 unsigned int *total,
797 int mc_count,
798 struct dev_addr_list *mc_list)
799 {
800 struct wl1271 *wl = hw->priv;
801
802 wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
803
804 *total &= WL1271_SUPPORTED_FILTERS;
805 changed &= WL1271_SUPPORTED_FILTERS;
806
807 if (changed == 0)
808 return;
809
810 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
811 wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
812 wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
813
814 /*
815 * FIXME: workqueues need to be properly cancelled on stop(), for
816 * now let's just disable changing the filter settings. They will
817 * be updated any on config().
818 */
819 /* schedule_work(&wl->filter_work); */
820 }
821
822 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
823 struct ieee80211_vif *vif,
824 struct ieee80211_sta *sta,
825 struct ieee80211_key_conf *key_conf)
826 {
827 struct wl1271 *wl = hw->priv;
828 const u8 *addr;
829 int ret;
830 u8 key_type;
831
832 static const u8 bcast_addr[ETH_ALEN] =
833 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
834
835 wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
836
837 addr = sta ? sta->addr : bcast_addr;
838
839 wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
840 wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
841 wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
842 key_conf->alg, key_conf->keyidx,
843 key_conf->keylen, key_conf->flags);
844 wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
845
846 if (is_zero_ether_addr(addr)) {
847 /* We dont support TX only encryption */
848 ret = -EOPNOTSUPP;
849 goto out;
850 }
851
852 mutex_lock(&wl->mutex);
853
854 ret = wl1271_ps_elp_wakeup(wl, false);
855 if (ret < 0)
856 goto out_unlock;
857
858 switch (key_conf->alg) {
859 case ALG_WEP:
860 key_type = KEY_WEP;
861
862 key_conf->hw_key_idx = key_conf->keyidx;
863 break;
864 case ALG_TKIP:
865 key_type = KEY_TKIP;
866
867 key_conf->hw_key_idx = key_conf->keyidx;
868 break;
869 case ALG_CCMP:
870 key_type = KEY_AES;
871
872 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
873 break;
874 default:
875 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
876
877 ret = -EOPNOTSUPP;
878 goto out_sleep;
879 }
880
881 switch (cmd) {
882 case SET_KEY:
883 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
884 key_conf->keyidx, key_type,
885 key_conf->keylen, key_conf->key,
886 addr);
887 if (ret < 0) {
888 wl1271_error("Could not add or replace key");
889 goto out_sleep;
890 }
891 break;
892
893 case DISABLE_KEY:
894 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
895 key_conf->keyidx, key_type,
896 key_conf->keylen, key_conf->key,
897 addr);
898 if (ret < 0) {
899 wl1271_error("Could not remove key");
900 goto out_sleep;
901 }
902 break;
903
904 default:
905 wl1271_error("Unsupported key cmd 0x%x", cmd);
906 ret = -EOPNOTSUPP;
907 goto out_sleep;
908
909 break;
910 }
911
912 out_sleep:
913 wl1271_ps_elp_sleep(wl);
914
915 out_unlock:
916 mutex_unlock(&wl->mutex);
917
918 out:
919 return ret;
920 }
921
922 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
923 struct cfg80211_scan_request *req)
924 {
925 struct wl1271 *wl = hw->priv;
926 int ret;
927 u8 *ssid = NULL;
928 size_t ssid_len = 0;
929
930 wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
931
932 if (req->n_ssids) {
933 ssid = req->ssids[0].ssid;
934 ssid_len = req->ssids[0].ssid_len;
935 }
936
937 mutex_lock(&wl->mutex);
938
939 ret = wl1271_ps_elp_wakeup(wl, false);
940 if (ret < 0)
941 goto out;
942
943 ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
944
945 wl1271_ps_elp_sleep(wl);
946
947 out:
948 mutex_unlock(&wl->mutex);
949
950 return ret;
951 }
952
953 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
954 {
955 struct wl1271 *wl = hw->priv;
956 int ret;
957
958 mutex_lock(&wl->mutex);
959
960 ret = wl1271_ps_elp_wakeup(wl, false);
961 if (ret < 0)
962 goto out;
963
964 ret = wl1271_acx_rts_threshold(wl, (u16) value);
965 if (ret < 0)
966 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
967
968 wl1271_ps_elp_sleep(wl);
969
970 out:
971 mutex_unlock(&wl->mutex);
972
973 return ret;
974 }
975
976 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
977 struct ieee80211_vif *vif,
978 struct ieee80211_bss_conf *bss_conf,
979 u32 changed)
980 {
981 enum wl1271_cmd_ps_mode mode;
982 struct wl1271 *wl = hw->priv;
983 int ret;
984
985 wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
986
987 mutex_lock(&wl->mutex);
988
989 ret = wl1271_ps_elp_wakeup(wl, false);
990 if (ret < 0)
991 goto out;
992
993 if (changed & BSS_CHANGED_ASSOC) {
994 if (bss_conf->assoc) {
995 wl->aid = bss_conf->aid;
996
997 ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
998 if (ret < 0)
999 goto out_sleep;
1000
1001 ret = wl1271_acx_aid(wl, wl->aid);
1002 if (ret < 0)
1003 goto out_sleep;
1004
1005 /* If we want to go in PSM but we're not there yet */
1006 if (wl->psm_requested && !wl->psm) {
1007 mode = STATION_POWER_SAVE_MODE;
1008 ret = wl1271_ps_set_mode(wl, mode);
1009 if (ret < 0)
1010 goto out_sleep;
1011 }
1012 }
1013 }
1014 if (changed & BSS_CHANGED_ERP_SLOT) {
1015 if (bss_conf->use_short_slot)
1016 ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1017 else
1018 ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1019 if (ret < 0) {
1020 wl1271_warning("Set slot time failed %d", ret);
1021 goto out_sleep;
1022 }
1023 }
1024
1025 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1026 if (bss_conf->use_short_preamble)
1027 wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1028 else
1029 wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1030 }
1031
1032 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1033 if (bss_conf->use_cts_prot)
1034 ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1035 else
1036 ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1037 if (ret < 0) {
1038 wl1271_warning("Set ctsprotect failed %d", ret);
1039 goto out_sleep;
1040 }
1041 }
1042
1043 out_sleep:
1044 wl1271_ps_elp_sleep(wl);
1045
1046 out:
1047 mutex_unlock(&wl->mutex);
1048 }
1049
1050
1051 /* can't be const, mac80211 writes to this */
1052 static struct ieee80211_rate wl1271_rates[] = {
1053 { .bitrate = 10,
1054 .hw_value = 0x1,
1055 .hw_value_short = 0x1, },
1056 { .bitrate = 20,
1057 .hw_value = 0x2,
1058 .hw_value_short = 0x2,
1059 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1060 { .bitrate = 55,
1061 .hw_value = 0x4,
1062 .hw_value_short = 0x4,
1063 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1064 { .bitrate = 110,
1065 .hw_value = 0x20,
1066 .hw_value_short = 0x20,
1067 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1068 { .bitrate = 60,
1069 .hw_value = 0x8,
1070 .hw_value_short = 0x8, },
1071 { .bitrate = 90,
1072 .hw_value = 0x10,
1073 .hw_value_short = 0x10, },
1074 { .bitrate = 120,
1075 .hw_value = 0x40,
1076 .hw_value_short = 0x40, },
1077 { .bitrate = 180,
1078 .hw_value = 0x80,
1079 .hw_value_short = 0x80, },
1080 { .bitrate = 240,
1081 .hw_value = 0x200,
1082 .hw_value_short = 0x200, },
1083 { .bitrate = 360,
1084 .hw_value = 0x400,
1085 .hw_value_short = 0x400, },
1086 { .bitrate = 480,
1087 .hw_value = 0x800,
1088 .hw_value_short = 0x800, },
1089 { .bitrate = 540,
1090 .hw_value = 0x1000,
1091 .hw_value_short = 0x1000, },
1092 };
1093
1094 /* can't be const, mac80211 writes to this */
1095 static struct ieee80211_channel wl1271_channels[] = {
1096 { .hw_value = 1, .center_freq = 2412},
1097 { .hw_value = 2, .center_freq = 2417},
1098 { .hw_value = 3, .center_freq = 2422},
1099 { .hw_value = 4, .center_freq = 2427},
1100 { .hw_value = 5, .center_freq = 2432},
1101 { .hw_value = 6, .center_freq = 2437},
1102 { .hw_value = 7, .center_freq = 2442},
1103 { .hw_value = 8, .center_freq = 2447},
1104 { .hw_value = 9, .center_freq = 2452},
1105 { .hw_value = 10, .center_freq = 2457},
1106 { .hw_value = 11, .center_freq = 2462},
1107 { .hw_value = 12, .center_freq = 2467},
1108 { .hw_value = 13, .center_freq = 2472},
1109 };
1110
1111 /* can't be const, mac80211 writes to this */
1112 static struct ieee80211_supported_band wl1271_band_2ghz = {
1113 .channels = wl1271_channels,
1114 .n_channels = ARRAY_SIZE(wl1271_channels),
1115 .bitrates = wl1271_rates,
1116 .n_bitrates = ARRAY_SIZE(wl1271_rates),
1117 };
1118
1119 static const struct ieee80211_ops wl1271_ops = {
1120 .start = wl1271_op_start,
1121 .stop = wl1271_op_stop,
1122 .add_interface = wl1271_op_add_interface,
1123 .remove_interface = wl1271_op_remove_interface,
1124 .config = wl1271_op_config,
1125 /* .config_interface = wl1271_op_config_interface, */
1126 .configure_filter = wl1271_op_configure_filter,
1127 .tx = wl1271_op_tx,
1128 .set_key = wl1271_op_set_key,
1129 .hw_scan = wl1271_op_hw_scan,
1130 .bss_info_changed = wl1271_op_bss_info_changed,
1131 .set_rts_threshold = wl1271_op_set_rts_threshold,
1132 };
1133
1134 static int wl1271_register_hw(struct wl1271 *wl)
1135 {
1136 int ret;
1137
1138 if (wl->mac80211_registered)
1139 return 0;
1140
1141 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1142
1143 ret = ieee80211_register_hw(wl->hw);
1144 if (ret < 0) {
1145 wl1271_error("unable to register mac80211 hw: %d", ret);
1146 return ret;
1147 }
1148
1149 wl->mac80211_registered = true;
1150
1151 wl1271_notice("loaded");
1152
1153 return 0;
1154 }
1155
1156 static int wl1271_init_ieee80211(struct wl1271 *wl)
1157 {
1158 /*
1159 * The tx descriptor buffer and the TKIP space.
1160 *
1161 * FIXME: add correct 1271 descriptor size
1162 */
1163 wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE;
1164
1165 /* unit us */
1166 /* FIXME: find a proper value */
1167 wl->hw->channel_change_time = 10000;
1168
1169 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1170 IEEE80211_HW_NOISE_DBM;
1171
1172 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1173 wl->hw->wiphy->max_scan_ssids = 1;
1174 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1175
1176 SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1177
1178 return 0;
1179 }
1180
1181 static void wl1271_device_release(struct device *dev)
1182 {
1183
1184 }
1185
1186 static struct platform_device wl1271_device = {
1187 .name = "wl1271",
1188 .id = -1,
1189
1190 /* device model insists to have a release function */
1191 .dev = {
1192 .release = wl1271_device_release,
1193 },
1194 };
1195
1196 #define WL1271_DEFAULT_CHANNEL 0
1197 static int __devinit wl1271_probe(struct spi_device *spi)
1198 {
1199 struct wl12xx_platform_data *pdata;
1200 struct ieee80211_hw *hw;
1201 struct wl1271 *wl;
1202 int ret, i;
1203 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1204
1205 pdata = spi->dev.platform_data;
1206 if (!pdata) {
1207 wl1271_error("no platform data");
1208 return -ENODEV;
1209 }
1210
1211 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1212 if (!hw) {
1213 wl1271_error("could not alloc ieee80211_hw");
1214 return -ENOMEM;
1215 }
1216
1217 wl = hw->priv;
1218 memset(wl, 0, sizeof(*wl));
1219
1220 wl->hw = hw;
1221 dev_set_drvdata(&spi->dev, wl);
1222 wl->spi = spi;
1223
1224 skb_queue_head_init(&wl->tx_queue);
1225
1226 INIT_WORK(&wl->filter_work, wl1271_filter_work);
1227 wl->channel = WL1271_DEFAULT_CHANNEL;
1228 wl->scanning = false;
1229 wl->default_key = 0;
1230 wl->listen_int = 1;
1231 wl->rx_counter = 0;
1232 wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1233 wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1234 wl->elp = false;
1235 wl->psm = 0;
1236 wl->psm_requested = false;
1237 wl->tx_queue_stopped = false;
1238 wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1239
1240 /* We use the default power on sleep time until we know which chip
1241 * we're using */
1242 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1243 wl->tx_frames[i] = NULL;
1244
1245 spin_lock_init(&wl->wl_lock);
1246
1247 /*
1248 * In case our MAC address is not correctly set,
1249 * we use a random but Nokia MAC.
1250 */
1251 memcpy(wl->mac_addr, nokia_oui, 3);
1252 get_random_bytes(wl->mac_addr + 3, 3);
1253
1254 wl->state = WL1271_STATE_OFF;
1255 mutex_init(&wl->mutex);
1256
1257 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1258 if (!wl->rx_descriptor) {
1259 wl1271_error("could not allocate memory for rx descriptor");
1260 ret = -ENOMEM;
1261 goto out_free;
1262 }
1263
1264 /* This is the only SPI value that we need to set here, the rest
1265 * comes from the board-peripherals file */
1266 spi->bits_per_word = 32;
1267
1268 ret = spi_setup(spi);
1269 if (ret < 0) {
1270 wl1271_error("spi_setup failed");
1271 goto out_free;
1272 }
1273
1274 wl->set_power = pdata->set_power;
1275 if (!wl->set_power) {
1276 wl1271_error("set power function missing in platform data");
1277 ret = -ENODEV;
1278 goto out_free;
1279 }
1280
1281 wl->irq = spi->irq;
1282 if (wl->irq < 0) {
1283 wl1271_error("irq missing in platform data");
1284 ret = -ENODEV;
1285 goto out_free;
1286 }
1287
1288 ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1289 if (ret < 0) {
1290 wl1271_error("request_irq() failed: %d", ret);
1291 goto out_free;
1292 }
1293
1294 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1295
1296 disable_irq(wl->irq);
1297
1298 ret = platform_device_register(&wl1271_device);
1299 if (ret) {
1300 wl1271_error("couldn't register platform device");
1301 goto out_irq;
1302 }
1303 dev_set_drvdata(&wl1271_device.dev, wl);
1304
1305 ret = wl1271_init_ieee80211(wl);
1306 if (ret)
1307 goto out_platform;
1308
1309 ret = wl1271_register_hw(wl);
1310 if (ret)
1311 goto out_platform;
1312
1313 wl1271_debugfs_init(wl);
1314
1315 wl1271_notice("initialized");
1316
1317 return 0;
1318
1319 out_platform:
1320 platform_device_unregister(&wl1271_device);
1321
1322 out_irq:
1323 free_irq(wl->irq, wl);
1324
1325 out_free:
1326 kfree(wl->rx_descriptor);
1327 wl->rx_descriptor = NULL;
1328
1329 ieee80211_free_hw(hw);
1330
1331 return ret;
1332 }
1333
1334 static int __devexit wl1271_remove(struct spi_device *spi)
1335 {
1336 struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1337
1338 ieee80211_unregister_hw(wl->hw);
1339
1340 wl1271_debugfs_exit(wl);
1341 platform_device_unregister(&wl1271_device);
1342 free_irq(wl->irq, wl);
1343 kfree(wl->target_mem_map);
1344 kfree(wl->fw);
1345 wl->fw = NULL;
1346 kfree(wl->nvs);
1347 wl->nvs = NULL;
1348
1349 kfree(wl->rx_descriptor);
1350 wl->rx_descriptor = NULL;
1351
1352 kfree(wl->fw_status);
1353 kfree(wl->tx_res_if);
1354
1355 ieee80211_free_hw(wl->hw);
1356
1357 return 0;
1358 }
1359
1360
1361 static struct spi_driver wl1271_spi_driver = {
1362 .driver = {
1363 .name = "wl1271",
1364 .bus = &spi_bus_type,
1365 .owner = THIS_MODULE,
1366 },
1367
1368 .probe = wl1271_probe,
1369 .remove = __devexit_p(wl1271_remove),
1370 };
1371
1372 static int __init wl1271_init(void)
1373 {
1374 int ret;
1375
1376 ret = spi_register_driver(&wl1271_spi_driver);
1377 if (ret < 0) {
1378 wl1271_error("failed to register spi driver: %d", ret);
1379 goto out;
1380 }
1381
1382 out:
1383 return ret;
1384 }
1385
1386 static void __exit wl1271_exit(void)
1387 {
1388 spi_unregister_driver(&wl1271_spi_driver);
1389
1390 wl1271_notice("unloaded");
1391 }
1392
1393 module_init(wl1271_init);
1394 module_exit(wl1271_exit);
1395
1396 MODULE_LICENSE("GPL");
1397 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
Linux kernel - Deliverables
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