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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / wireless / wl12xx / wl1271_main.c
blob27298b19d5bd393592da7a165887ba21c0c97067
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 int ret = 0;
609
610 wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
611 conf->type, conf->mac_addr);
612
613 mutex_lock(&wl->mutex);
614
615 switch (conf->type) {
616 case NL80211_IFTYPE_STATION:
617 wl->bss_type = BSS_TYPE_STA_BSS;
618 break;
619 case NL80211_IFTYPE_ADHOC:
620 wl->bss_type = BSS_TYPE_IBSS;
621 break;
622 default:
623 ret = -EOPNOTSUPP;
624 goto out;
625 }
626
627 /* FIXME: what if conf->mac_addr changes? */
628
629 out:
630 mutex_unlock(&wl->mutex);
631 return ret;
632 }
633
634 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
635 struct ieee80211_if_init_conf *conf)
636 {
637 wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
638 }
639
640 #if 0
641 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
642 struct ieee80211_vif *vif,
643 struct ieee80211_if_conf *conf)
644 {
645 struct wl1271 *wl = hw->priv;
646 struct sk_buff *beacon;
647 int ret;
648
649 wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %pM",
650 conf->bssid);
651 wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
652 conf->ssid_len);
653
654 mutex_lock(&wl->mutex);
655
656 ret = wl1271_ps_elp_wakeup(wl, false);
657 if (ret < 0)
658 goto out;
659
660 memcpy(wl->bssid, conf->bssid, ETH_ALEN);
661
662 ret = wl1271_cmd_build_null_data(wl);
663 if (ret < 0)
664 goto out_sleep;
665
666 wl->ssid_len = conf->ssid_len;
667 if (wl->ssid_len)
668 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
669
670 if (wl->bss_type != BSS_TYPE_IBSS) {
671 /* FIXME: replace the magic numbers with proper definitions */
672 ret = wl1271_cmd_join(wl, wl->bss_type, 5, 100, 1);
673 if (ret < 0)
674 goto out_sleep;
675 }
676
677 if (conf->changed & IEEE80211_IFCC_BEACON) {
678 beacon = ieee80211_beacon_get(hw, vif);
679 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
680 beacon->data, beacon->len);
681
682 if (ret < 0) {
683 dev_kfree_skb(beacon);
684 goto out_sleep;
685 }
686
687 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
688 beacon->data, beacon->len);
689
690 dev_kfree_skb(beacon);
691
692 if (ret < 0)
693 goto out_sleep;
694
695 /* FIXME: replace the magic numbers with proper definitions */
696 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
697
698 if (ret < 0)
699 goto out_sleep;
700 }
701
702 out_sleep:
703 wl1271_ps_elp_sleep(wl);
704
705 out:
706 mutex_unlock(&wl->mutex);
707
708 return ret;
709 }
710 #endif
711
712 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
713 {
714 struct wl1271 *wl = hw->priv;
715 struct ieee80211_conf *conf = &hw->conf;
716 int channel, ret = 0;
717
718 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
719
720 wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
721 channel,
722 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
723 conf->power_level);
724
725 mutex_lock(&wl->mutex);
726
727 ret = wl1271_ps_elp_wakeup(wl, false);
728 if (ret < 0)
729 goto out;
730
731 if (channel != wl->channel) {
732 u8 old_channel = wl->channel;
733 wl->channel = channel;
734
735 /* FIXME: use beacon interval provided by mac80211 */
736 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
737 if (ret < 0) {
738 wl->channel = old_channel;
739 goto out_sleep;
740 }
741 }
742
743 ret = wl1271_cmd_build_null_data(wl);
744 if (ret < 0)
745 goto out_sleep;
746
747 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
748 wl1271_info("psm enabled");
749
750 wl->psm_requested = true;
751
752 /*
753 * We enter PSM only if we're already associated.
754 * If we're not, we'll enter it when joining an SSID,
755 * through the bss_info_changed() hook.
756 */
757 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
758 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
759 wl->psm_requested) {
760 wl1271_info("psm disabled");
761
762 wl->psm_requested = false;
763
764 if (wl->psm)
765 ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
766 }
767
768 if (conf->power_level != wl->power_level) {
769 ret = wl1271_acx_tx_power(wl, conf->power_level);
770 if (ret < 0)
771 goto out;
772
773 wl->power_level = conf->power_level;
774 }
775
776 out_sleep:
777 wl1271_ps_elp_sleep(wl);
778
779 out:
780 mutex_unlock(&wl->mutex);
781
782 return ret;
783 }
784
785 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
786 FIF_ALLMULTI | \
787 FIF_FCSFAIL | \
788 FIF_BCN_PRBRESP_PROMISC | \
789 FIF_CONTROL | \
790 FIF_OTHER_BSS)
791
792 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
793 unsigned int changed,
794 unsigned int *total,u64 multicast)
795 {
796 struct wl1271 *wl = hw->priv;
797
798 wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
799
800 *total &= WL1271_SUPPORTED_FILTERS;
801 changed &= WL1271_SUPPORTED_FILTERS;
802
803 if (changed == 0)
804 return;
805
806 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
807 wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
808 wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
809
810 /*
811 * FIXME: workqueues need to be properly cancelled on stop(), for
812 * now let's just disable changing the filter settings. They will
813 * be updated any on config().
814 */
815 /* schedule_work(&wl->filter_work); */
816 }
817
818 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
819 struct ieee80211_vif *vif,
820 struct ieee80211_sta *sta,
821 struct ieee80211_key_conf *key_conf)
822 {
823 struct wl1271 *wl = hw->priv;
824 const u8 *addr;
825 int ret;
826 u8 key_type;
827
828 static const u8 bcast_addr[ETH_ALEN] =
829 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
830
831 wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
832
833 addr = sta ? sta->addr : bcast_addr;
834
835 wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
836 wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
837 wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
838 key_conf->alg, key_conf->keyidx,
839 key_conf->keylen, key_conf->flags);
840 wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
841
842 if (is_zero_ether_addr(addr)) {
843 /* We dont support TX only encryption */
844 ret = -EOPNOTSUPP;
845 goto out;
846 }
847
848 mutex_lock(&wl->mutex);
849
850 ret = wl1271_ps_elp_wakeup(wl, false);
851 if (ret < 0)
852 goto out_unlock;
853
854 switch (key_conf->alg) {
855 case ALG_WEP:
856 key_type = KEY_WEP;
857
858 key_conf->hw_key_idx = key_conf->keyidx;
859 break;
860 case ALG_TKIP:
861 key_type = KEY_TKIP;
862
863 key_conf->hw_key_idx = key_conf->keyidx;
864 break;
865 case ALG_CCMP:
866 key_type = KEY_AES;
867
868 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
869 break;
870 default:
871 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
872
873 ret = -EOPNOTSUPP;
874 goto out_sleep;
875 }
876
877 switch (cmd) {
878 case SET_KEY:
879 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
880 key_conf->keyidx, key_type,
881 key_conf->keylen, key_conf->key,
882 addr);
883 if (ret < 0) {
884 wl1271_error("Could not add or replace key");
885 goto out_sleep;
886 }
887 break;
888
889 case DISABLE_KEY:
890 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
891 key_conf->keyidx, key_type,
892 key_conf->keylen, key_conf->key,
893 addr);
894 if (ret < 0) {
895 wl1271_error("Could not remove key");
896 goto out_sleep;
897 }
898 break;
899
900 default:
901 wl1271_error("Unsupported key cmd 0x%x", cmd);
902 ret = -EOPNOTSUPP;
903 goto out_sleep;
904
905 break;
906 }
907
908 out_sleep:
909 wl1271_ps_elp_sleep(wl);
910
911 out_unlock:
912 mutex_unlock(&wl->mutex);
913
914 out:
915 return ret;
916 }
917
918 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
919 struct cfg80211_scan_request *req)
920 {
921 struct wl1271 *wl = hw->priv;
922 int ret;
923 u8 *ssid = NULL;
924 size_t ssid_len = 0;
925
926 wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
927
928 if (req->n_ssids) {
929 ssid = req->ssids[0].ssid;
930 ssid_len = req->ssids[0].ssid_len;
931 }
932
933 mutex_lock(&wl->mutex);
934
935 ret = wl1271_ps_elp_wakeup(wl, false);
936 if (ret < 0)
937 goto out;
938
939 ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
940
941 wl1271_ps_elp_sleep(wl);
942
943 out:
944 mutex_unlock(&wl->mutex);
945
946 return ret;
947 }
948
949 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
950 {
951 struct wl1271 *wl = hw->priv;
952 int ret;
953
954 mutex_lock(&wl->mutex);
955
956 ret = wl1271_ps_elp_wakeup(wl, false);
957 if (ret < 0)
958 goto out;
959
960 ret = wl1271_acx_rts_threshold(wl, (u16) value);
961 if (ret < 0)
962 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
963
964 wl1271_ps_elp_sleep(wl);
965
966 out:
967 mutex_unlock(&wl->mutex);
968
969 return ret;
970 }
971
972 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
973 struct ieee80211_vif *vif,
974 struct ieee80211_bss_conf *bss_conf,
975 u32 changed)
976 {
977 enum wl1271_cmd_ps_mode mode;
978 struct wl1271 *wl = hw->priv;
979 int ret;
980
981 wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
982
983 mutex_lock(&wl->mutex);
984
985 ret = wl1271_ps_elp_wakeup(wl, false);
986 if (ret < 0)
987 goto out;
988
989 if (changed & BSS_CHANGED_ASSOC) {
990 if (bss_conf->assoc) {
991 wl->aid = bss_conf->aid;
992
993 ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
994 if (ret < 0)
995 goto out_sleep;
996
997 ret = wl1271_acx_aid(wl, wl->aid);
998 if (ret < 0)
999 goto out_sleep;
1000
1001 /* If we want to go in PSM but we're not there yet */
1002 if (wl->psm_requested && !wl->psm) {
1003 mode = STATION_POWER_SAVE_MODE;
1004 ret = wl1271_ps_set_mode(wl, mode);
1005 if (ret < 0)
1006 goto out_sleep;
1007 }
1008 }
1009 }
1010 if (changed & BSS_CHANGED_ERP_SLOT) {
1011 if (bss_conf->use_short_slot)
1012 ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1013 else
1014 ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1015 if (ret < 0) {
1016 wl1271_warning("Set slot time failed %d", ret);
1017 goto out_sleep;
1018 }
1019 }
1020
1021 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1022 if (bss_conf->use_short_preamble)
1023 wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1024 else
1025 wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1026 }
1027
1028 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1029 if (bss_conf->use_cts_prot)
1030 ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1031 else
1032 ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1033 if (ret < 0) {
1034 wl1271_warning("Set ctsprotect failed %d", ret);
1035 goto out_sleep;
1036 }
1037 }
1038
1039 out_sleep:
1040 wl1271_ps_elp_sleep(wl);
1041
1042 out:
1043 mutex_unlock(&wl->mutex);
1044 }
1045
1046
1047 /* can't be const, mac80211 writes to this */
1048 static struct ieee80211_rate wl1271_rates[] = {
1049 { .bitrate = 10,
1050 .hw_value = 0x1,
1051 .hw_value_short = 0x1, },
1052 { .bitrate = 20,
1053 .hw_value = 0x2,
1054 .hw_value_short = 0x2,
1055 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1056 { .bitrate = 55,
1057 .hw_value = 0x4,
1058 .hw_value_short = 0x4,
1059 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1060 { .bitrate = 110,
1061 .hw_value = 0x20,
1062 .hw_value_short = 0x20,
1063 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1064 { .bitrate = 60,
1065 .hw_value = 0x8,
1066 .hw_value_short = 0x8, },
1067 { .bitrate = 90,
1068 .hw_value = 0x10,
1069 .hw_value_short = 0x10, },
1070 { .bitrate = 120,
1071 .hw_value = 0x40,
1072 .hw_value_short = 0x40, },
1073 { .bitrate = 180,
1074 .hw_value = 0x80,
1075 .hw_value_short = 0x80, },
1076 { .bitrate = 240,
1077 .hw_value = 0x200,
1078 .hw_value_short = 0x200, },
1079 { .bitrate = 360,
1080 .hw_value = 0x400,
1081 .hw_value_short = 0x400, },
1082 { .bitrate = 480,
1083 .hw_value = 0x800,
1084 .hw_value_short = 0x800, },
1085 { .bitrate = 540,
1086 .hw_value = 0x1000,
1087 .hw_value_short = 0x1000, },
1088 };
1089
1090 /* can't be const, mac80211 writes to this */
1091 static struct ieee80211_channel wl1271_channels[] = {
1092 { .hw_value = 1, .center_freq = 2412},
1093 { .hw_value = 2, .center_freq = 2417},
1094 { .hw_value = 3, .center_freq = 2422},
1095 { .hw_value = 4, .center_freq = 2427},
1096 { .hw_value = 5, .center_freq = 2432},
1097 { .hw_value = 6, .center_freq = 2437},
1098 { .hw_value = 7, .center_freq = 2442},
1099 { .hw_value = 8, .center_freq = 2447},
1100 { .hw_value = 9, .center_freq = 2452},
1101 { .hw_value = 10, .center_freq = 2457},
1102 { .hw_value = 11, .center_freq = 2462},
1103 { .hw_value = 12, .center_freq = 2467},
1104 { .hw_value = 13, .center_freq = 2472},
1105 };
1106
1107 /* can't be const, mac80211 writes to this */
1108 static struct ieee80211_supported_band wl1271_band_2ghz = {
1109 .channels = wl1271_channels,
1110 .n_channels = ARRAY_SIZE(wl1271_channels),
1111 .bitrates = wl1271_rates,
1112 .n_bitrates = ARRAY_SIZE(wl1271_rates),
1113 };
1114
1115 static const struct ieee80211_ops wl1271_ops = {
1116 .start = wl1271_op_start,
1117 .stop = wl1271_op_stop,
1118 .add_interface = wl1271_op_add_interface,
1119 .remove_interface = wl1271_op_remove_interface,
1120 .config = wl1271_op_config,
1121 /* .config_interface = wl1271_op_config_interface, */
1122 .configure_filter = wl1271_op_configure_filter,
1123 .tx = wl1271_op_tx,
1124 .set_key = wl1271_op_set_key,
1125 .hw_scan = wl1271_op_hw_scan,
1126 .bss_info_changed = wl1271_op_bss_info_changed,
1127 .set_rts_threshold = wl1271_op_set_rts_threshold,
1128 };
1129
1130 static int wl1271_register_hw(struct wl1271 *wl)
1131 {
1132 int ret;
1133
1134 if (wl->mac80211_registered)
1135 return 0;
1136
1137 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1138
1139 ret = ieee80211_register_hw(wl->hw);
1140 if (ret < 0) {
1141 wl1271_error("unable to register mac80211 hw: %d", ret);
1142 return ret;
1143 }
1144
1145 wl->mac80211_registered = true;
1146
1147 wl1271_notice("loaded");
1148
1149 return 0;
1150 }
1151
1152 static int wl1271_init_ieee80211(struct wl1271 *wl)
1153 {
1154 /*
1155 * The tx descriptor buffer and the TKIP space.
1156 *
1157 * FIXME: add correct 1271 descriptor size
1158 */
1159 wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE;
1160
1161 /* unit us */
1162 /* FIXME: find a proper value */
1163 wl->hw->channel_change_time = 10000;
1164
1165 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1166 IEEE80211_HW_NOISE_DBM;
1167
1168 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1169 wl->hw->wiphy->max_scan_ssids = 1;
1170 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1171
1172 SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1173
1174 return 0;
1175 }
1176
1177 static void wl1271_device_release(struct device *dev)
1178 {
1179
1180 }
1181
1182 static struct platform_device wl1271_device = {
1183 .name = "wl1271",
1184 .id = -1,
1185
1186 /* device model insists to have a release function */
1187 .dev = {
1188 .release = wl1271_device_release,
1189 },
1190 };
1191
1192 #define WL1271_DEFAULT_CHANNEL 0
1193 static int __devinit wl1271_probe(struct spi_device *spi)
1194 {
1195 struct wl12xx_platform_data *pdata;
1196 struct ieee80211_hw *hw;
1197 struct wl1271 *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 wl1271_error("no platform data");
1204 return -ENODEV;
1205 }
1206
1207 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1208 if (!hw) {
1209 wl1271_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 skb_queue_head_init(&wl->tx_queue);
1221
1222 INIT_WORK(&wl->filter_work, wl1271_filter_work);
1223 wl->channel = WL1271_DEFAULT_CHANNEL;
1224 wl->scanning = false;
1225 wl->default_key = 0;
1226 wl->listen_int = 1;
1227 wl->rx_counter = 0;
1228 wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1229 wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1230 wl->elp = false;
1231 wl->psm = 0;
1232 wl->psm_requested = false;
1233 wl->tx_queue_stopped = false;
1234 wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1235
1236 /* We use the default power on sleep time until we know which chip
1237 * we're using */
1238 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1239 wl->tx_frames[i] = NULL;
1240
1241 spin_lock_init(&wl->wl_lock);
1242
1243 /*
1244 * In case our MAC address is not correctly set,
1245 * we use a random but Nokia MAC.
1246 */
1247 memcpy(wl->mac_addr, nokia_oui, 3);
1248 get_random_bytes(wl->mac_addr + 3, 3);
1249
1250 wl->state = WL1271_STATE_OFF;
1251 mutex_init(&wl->mutex);
1252
1253 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1254 if (!wl->rx_descriptor) {
1255 wl1271_error("could not allocate memory for rx descriptor");
1256 ret = -ENOMEM;
1257 goto out_free;
1258 }
1259
1260 /* This is the only SPI value that we need to set here, the rest
1261 * comes from the board-peripherals file */
1262 spi->bits_per_word = 32;
1263
1264 ret = spi_setup(spi);
1265 if (ret < 0) {
1266 wl1271_error("spi_setup failed");
1267 goto out_free;
1268 }
1269
1270 wl->set_power = pdata->set_power;
1271 if (!wl->set_power) {
1272 wl1271_error("set power function missing in platform data");
1273 ret = -ENODEV;
1274 goto out_free;
1275 }
1276
1277 wl->irq = spi->irq;
1278 if (wl->irq < 0) {
1279 wl1271_error("irq missing in platform data");
1280 ret = -ENODEV;
1281 goto out_free;
1282 }
1283
1284 ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1285 if (ret < 0) {
1286 wl1271_error("request_irq() failed: %d", ret);
1287 goto out_free;
1288 }
1289
1290 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1291
1292 disable_irq(wl->irq);
1293
1294 ret = platform_device_register(&wl1271_device);
1295 if (ret) {
1296 wl1271_error("couldn't register platform device");
1297 goto out_irq;
1298 }
1299 dev_set_drvdata(&wl1271_device.dev, wl);
1300
1301 ret = wl1271_init_ieee80211(wl);
1302 if (ret)
1303 goto out_platform;
1304
1305 ret = wl1271_register_hw(wl);
1306 if (ret)
1307 goto out_platform;
1308
1309 wl1271_debugfs_init(wl);
1310
1311 wl1271_notice("initialized");
1312
1313 return 0;
1314
1315 out_platform:
1316 platform_device_unregister(&wl1271_device);
1317
1318 out_irq:
1319 free_irq(wl->irq, wl);
1320
1321 out_free:
1322 kfree(wl->rx_descriptor);
1323 wl->rx_descriptor = NULL;
1324
1325 ieee80211_free_hw(hw);
1326
1327 return ret;
1328 }
1329
1330 static int __devexit wl1271_remove(struct spi_device *spi)
1331 {
1332 struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1333
1334 ieee80211_unregister_hw(wl->hw);
1335
1336 wl1271_debugfs_exit(wl);
1337 platform_device_unregister(&wl1271_device);
1338 free_irq(wl->irq, wl);
1339 kfree(wl->target_mem_map);
1340 kfree(wl->fw);
1341 wl->fw = NULL;
1342 kfree(wl->nvs);
1343 wl->nvs = NULL;
1344
1345 kfree(wl->rx_descriptor);
1346 wl->rx_descriptor = NULL;
1347
1348 kfree(wl->fw_status);
1349 kfree(wl->tx_res_if);
1350
1351 ieee80211_free_hw(wl->hw);
1352
1353 return 0;
1354 }
1355
1356
1357 static struct spi_driver wl1271_spi_driver = {
1358 .driver = {
1359 .name = "wl1271",
1360 .bus = &spi_bus_type,
1361 .owner = THIS_MODULE,
1362 },
1363
1364 .probe = wl1271_probe,
1365 .remove = __devexit_p(wl1271_remove),
1366 };
1367
1368 static int __init wl1271_init(void)
1369 {
1370 int ret;
1371
1372 ret = spi_register_driver(&wl1271_spi_driver);
1373 if (ret < 0) {
1374 wl1271_error("failed to register spi driver: %d", ret);
1375 goto out;
1376 }
1377
1378 out:
1379 return ret;
1380 }
1381
1382 static void __exit wl1271_exit(void)
1383 {
1384 spi_unregister_driver(&wl1271_spi_driver);
1385
1386 wl1271_notice("unloaded");
1387 }
1388
1389 module_init(wl1271_init);
1390 module_exit(wl1271_exit);
1391
1392 MODULE_LICENSE("GPL");
1393 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
Linux for Ginger Game Console