mac80211: allow configure_filter callback to sleep
[linux-2.6.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,u64 multicast)
797 {
798         struct wl1271 *wl = hw->priv;
799
800         wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
801
802         *total &= WL1271_SUPPORTED_FILTERS;
803         changed &= WL1271_SUPPORTED_FILTERS;
804
805         if (changed == 0)
806                 return;
807
808         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
809         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
810         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
811
812         /*
813          * FIXME: workqueues need to be properly cancelled on stop(), for
814          * now let's just disable changing the filter settings. They will
815          * be updated any on config().
816          */
817         /* schedule_work(&wl->filter_work); */
818 }
819
820 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
821                              struct ieee80211_vif *vif,
822                              struct ieee80211_sta *sta,
823                              struct ieee80211_key_conf *key_conf)
824 {
825         struct wl1271 *wl = hw->priv;
826         const u8 *addr;
827         int ret;
828         u8 key_type;
829
830         static const u8 bcast_addr[ETH_ALEN] =
831                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
832
833         wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
834
835         addr = sta ? sta->addr : bcast_addr;
836
837         wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
838         wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
839         wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
840                      key_conf->alg, key_conf->keyidx,
841                      key_conf->keylen, key_conf->flags);
842         wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
843
844         if (is_zero_ether_addr(addr)) {
845                 /* We dont support TX only encryption */
846                 ret = -EOPNOTSUPP;
847                 goto out;
848         }
849
850         mutex_lock(&wl->mutex);
851
852         ret = wl1271_ps_elp_wakeup(wl, false);
853         if (ret < 0)
854                 goto out_unlock;
855
856         switch (key_conf->alg) {
857         case ALG_WEP:
858                 key_type = KEY_WEP;
859
860                 key_conf->hw_key_idx = key_conf->keyidx;
861                 break;
862         case ALG_TKIP:
863                 key_type = KEY_TKIP;
864
865                 key_conf->hw_key_idx = key_conf->keyidx;
866                 break;
867         case ALG_CCMP:
868                 key_type = KEY_AES;
869
870                 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
871                 break;
872         default:
873                 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
874
875                 ret = -EOPNOTSUPP;
876                 goto out_sleep;
877         }
878
879         switch (cmd) {
880         case SET_KEY:
881                 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
882                                          key_conf->keyidx, key_type,
883                                          key_conf->keylen, key_conf->key,
884                                          addr);
885                 if (ret < 0) {
886                         wl1271_error("Could not add or replace key");
887                         goto out_sleep;
888                 }
889                 break;
890
891         case DISABLE_KEY:
892                 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
893                                          key_conf->keyidx, key_type,
894                                          key_conf->keylen, key_conf->key,
895                                          addr);
896                 if (ret < 0) {
897                         wl1271_error("Could not remove key");
898                         goto out_sleep;
899                 }
900                 break;
901
902         default:
903                 wl1271_error("Unsupported key cmd 0x%x", cmd);
904                 ret = -EOPNOTSUPP;
905                 goto out_sleep;
906
907                 break;
908         }
909
910 out_sleep:
911         wl1271_ps_elp_sleep(wl);
912
913 out_unlock:
914         mutex_unlock(&wl->mutex);
915
916 out:
917         return ret;
918 }
919
920 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
921                              struct cfg80211_scan_request *req)
922 {
923         struct wl1271 *wl = hw->priv;
924         int ret;
925         u8 *ssid = NULL;
926         size_t ssid_len = 0;
927
928         wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
929
930         if (req->n_ssids) {
931                 ssid = req->ssids[0].ssid;
932                 ssid_len = req->ssids[0].ssid_len;
933         }
934
935         mutex_lock(&wl->mutex);
936
937         ret = wl1271_ps_elp_wakeup(wl, false);
938         if (ret < 0)
939                 goto out;
940
941         ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
942
943         wl1271_ps_elp_sleep(wl);
944
945 out:
946         mutex_unlock(&wl->mutex);
947
948         return ret;
949 }
950
951 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
952 {
953         struct wl1271 *wl = hw->priv;
954         int ret;
955
956         mutex_lock(&wl->mutex);
957
958         ret = wl1271_ps_elp_wakeup(wl, false);
959         if (ret < 0)
960                 goto out;
961
962         ret = wl1271_acx_rts_threshold(wl, (u16) value);
963         if (ret < 0)
964                 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
965
966         wl1271_ps_elp_sleep(wl);
967
968 out:
969         mutex_unlock(&wl->mutex);
970
971         return ret;
972 }
973
974 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
975                                        struct ieee80211_vif *vif,
976                                        struct ieee80211_bss_conf *bss_conf,
977                                        u32 changed)
978 {
979         enum wl1271_cmd_ps_mode mode;
980         struct wl1271 *wl = hw->priv;
981         int ret;
982
983         wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
984
985         mutex_lock(&wl->mutex);
986
987         ret = wl1271_ps_elp_wakeup(wl, false);
988         if (ret < 0)
989                 goto out;
990
991         if (changed & BSS_CHANGED_ASSOC) {
992                 if (bss_conf->assoc) {
993                         wl->aid = bss_conf->aid;
994
995                         ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
996                         if (ret < 0)
997                                 goto out_sleep;
998
999                         ret = wl1271_acx_aid(wl, wl->aid);
1000                         if (ret < 0)
1001                                 goto out_sleep;
1002
1003                         /* If we want to go in PSM but we're not there yet */
1004                         if (wl->psm_requested && !wl->psm) {
1005                                 mode = STATION_POWER_SAVE_MODE;
1006                                 ret = wl1271_ps_set_mode(wl, mode);
1007                                 if (ret < 0)
1008                                         goto out_sleep;
1009                         }
1010                 }
1011         }
1012         if (changed & BSS_CHANGED_ERP_SLOT) {
1013                 if (bss_conf->use_short_slot)
1014                         ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1015                 else
1016                         ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1017                 if (ret < 0) {
1018                         wl1271_warning("Set slot time failed %d", ret);
1019                         goto out_sleep;
1020                 }
1021         }
1022
1023         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1024                 if (bss_conf->use_short_preamble)
1025                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1026                 else
1027                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1028         }
1029
1030         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1031                 if (bss_conf->use_cts_prot)
1032                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1033                 else
1034                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1035                 if (ret < 0) {
1036                         wl1271_warning("Set ctsprotect failed %d", ret);
1037                         goto out_sleep;
1038                 }
1039         }
1040
1041 out_sleep:
1042         wl1271_ps_elp_sleep(wl);
1043
1044 out:
1045         mutex_unlock(&wl->mutex);
1046 }
1047
1048
1049 /* can't be const, mac80211 writes to this */
1050 static struct ieee80211_rate wl1271_rates[] = {
1051         { .bitrate = 10,
1052           .hw_value = 0x1,
1053           .hw_value_short = 0x1, },
1054         { .bitrate = 20,
1055           .hw_value = 0x2,
1056           .hw_value_short = 0x2,
1057           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1058         { .bitrate = 55,
1059           .hw_value = 0x4,
1060           .hw_value_short = 0x4,
1061           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1062         { .bitrate = 110,
1063           .hw_value = 0x20,
1064           .hw_value_short = 0x20,
1065           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1066         { .bitrate = 60,
1067           .hw_value = 0x8,
1068           .hw_value_short = 0x8, },
1069         { .bitrate = 90,
1070           .hw_value = 0x10,
1071           .hw_value_short = 0x10, },
1072         { .bitrate = 120,
1073           .hw_value = 0x40,
1074           .hw_value_short = 0x40, },
1075         { .bitrate = 180,
1076           .hw_value = 0x80,
1077           .hw_value_short = 0x80, },
1078         { .bitrate = 240,
1079           .hw_value = 0x200,
1080           .hw_value_short = 0x200, },
1081         { .bitrate = 360,
1082          .hw_value = 0x400,
1083          .hw_value_short = 0x400, },
1084         { .bitrate = 480,
1085           .hw_value = 0x800,
1086           .hw_value_short = 0x800, },
1087         { .bitrate = 540,
1088           .hw_value = 0x1000,
1089           .hw_value_short = 0x1000, },
1090 };
1091
1092 /* can't be const, mac80211 writes to this */
1093 static struct ieee80211_channel wl1271_channels[] = {
1094         { .hw_value = 1, .center_freq = 2412},
1095         { .hw_value = 2, .center_freq = 2417},
1096         { .hw_value = 3, .center_freq = 2422},
1097         { .hw_value = 4, .center_freq = 2427},
1098         { .hw_value = 5, .center_freq = 2432},
1099         { .hw_value = 6, .center_freq = 2437},
1100         { .hw_value = 7, .center_freq = 2442},
1101         { .hw_value = 8, .center_freq = 2447},
1102         { .hw_value = 9, .center_freq = 2452},
1103         { .hw_value = 10, .center_freq = 2457},
1104         { .hw_value = 11, .center_freq = 2462},
1105         { .hw_value = 12, .center_freq = 2467},
1106         { .hw_value = 13, .center_freq = 2472},
1107 };
1108
1109 /* can't be const, mac80211 writes to this */
1110 static struct ieee80211_supported_band wl1271_band_2ghz = {
1111         .channels = wl1271_channels,
1112         .n_channels = ARRAY_SIZE(wl1271_channels),
1113         .bitrates = wl1271_rates,
1114         .n_bitrates = ARRAY_SIZE(wl1271_rates),
1115 };
1116
1117 static const struct ieee80211_ops wl1271_ops = {
1118         .start = wl1271_op_start,
1119         .stop = wl1271_op_stop,
1120         .add_interface = wl1271_op_add_interface,
1121         .remove_interface = wl1271_op_remove_interface,
1122         .config = wl1271_op_config,
1123 /*      .config_interface = wl1271_op_config_interface, */
1124         .configure_filter = wl1271_op_configure_filter,
1125         .tx = wl1271_op_tx,
1126         .set_key = wl1271_op_set_key,
1127         .hw_scan = wl1271_op_hw_scan,
1128         .bss_info_changed = wl1271_op_bss_info_changed,
1129         .set_rts_threshold = wl1271_op_set_rts_threshold,
1130 };
1131
1132 static int wl1271_register_hw(struct wl1271 *wl)
1133 {
1134         int ret;
1135
1136         if (wl->mac80211_registered)
1137                 return 0;
1138
1139         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1140
1141         ret = ieee80211_register_hw(wl->hw);
1142         if (ret < 0) {
1143                 wl1271_error("unable to register mac80211 hw: %d", ret);
1144                 return ret;
1145         }
1146
1147         wl->mac80211_registered = true;
1148
1149         wl1271_notice("loaded");
1150
1151         return 0;
1152 }
1153
1154 static int wl1271_init_ieee80211(struct wl1271 *wl)
1155 {
1156         /*
1157          * The tx descriptor buffer and the TKIP space.
1158          *
1159          * FIXME: add correct 1271 descriptor size
1160          */
1161         wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE;
1162
1163         /* unit us */
1164         /* FIXME: find a proper value */
1165         wl->hw->channel_change_time = 10000;
1166
1167         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1168                 IEEE80211_HW_NOISE_DBM;
1169
1170         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1171         wl->hw->wiphy->max_scan_ssids = 1;
1172         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1173
1174         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1175
1176         return 0;
1177 }
1178
1179 static void wl1271_device_release(struct device *dev)
1180 {
1181
1182 }
1183
1184 static struct platform_device wl1271_device = {
1185         .name           = "wl1271",
1186         .id             = -1,
1187
1188         /* device model insists to have a release function */
1189         .dev            = {
1190                 .release = wl1271_device_release,
1191         },
1192 };
1193
1194 #define WL1271_DEFAULT_CHANNEL 0
1195 static int __devinit wl1271_probe(struct spi_device *spi)
1196 {
1197         struct wl12xx_platform_data *pdata;
1198         struct ieee80211_hw *hw;
1199         struct wl1271 *wl;
1200         int ret, i;
1201         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1202
1203         pdata = spi->dev.platform_data;
1204         if (!pdata) {
1205                 wl1271_error("no platform data");
1206                 return -ENODEV;
1207         }
1208
1209         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1210         if (!hw) {
1211                 wl1271_error("could not alloc ieee80211_hw");
1212                 return -ENOMEM;
1213         }
1214
1215         wl = hw->priv;
1216         memset(wl, 0, sizeof(*wl));
1217
1218         wl->hw = hw;
1219         dev_set_drvdata(&spi->dev, wl);
1220         wl->spi = spi;
1221
1222         skb_queue_head_init(&wl->tx_queue);
1223
1224         INIT_WORK(&wl->filter_work, wl1271_filter_work);
1225         wl->channel = WL1271_DEFAULT_CHANNEL;
1226         wl->scanning = false;
1227         wl->default_key = 0;
1228         wl->listen_int = 1;
1229         wl->rx_counter = 0;
1230         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1231         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1232         wl->elp = false;
1233         wl->psm = 0;
1234         wl->psm_requested = false;
1235         wl->tx_queue_stopped = false;
1236         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1237
1238         /* We use the default power on sleep time until we know which chip
1239          * we're using */
1240         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1241                 wl->tx_frames[i] = NULL;
1242
1243         spin_lock_init(&wl->wl_lock);
1244
1245         /*
1246          * In case our MAC address is not correctly set,
1247          * we use a random but Nokia MAC.
1248          */
1249         memcpy(wl->mac_addr, nokia_oui, 3);
1250         get_random_bytes(wl->mac_addr + 3, 3);
1251
1252         wl->state = WL1271_STATE_OFF;
1253         mutex_init(&wl->mutex);
1254
1255         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1256         if (!wl->rx_descriptor) {
1257                 wl1271_error("could not allocate memory for rx descriptor");
1258                 ret = -ENOMEM;
1259                 goto out_free;
1260         }
1261
1262         /* This is the only SPI value that we need to set here, the rest
1263          * comes from the board-peripherals file */
1264         spi->bits_per_word = 32;
1265
1266         ret = spi_setup(spi);
1267         if (ret < 0) {
1268                 wl1271_error("spi_setup failed");
1269                 goto out_free;
1270         }
1271
1272         wl->set_power = pdata->set_power;
1273         if (!wl->set_power) {
1274                 wl1271_error("set power function missing in platform data");
1275                 ret = -ENODEV;
1276                 goto out_free;
1277         }
1278
1279         wl->irq = spi->irq;
1280         if (wl->irq < 0) {
1281                 wl1271_error("irq missing in platform data");
1282                 ret = -ENODEV;
1283                 goto out_free;
1284         }
1285
1286         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1287         if (ret < 0) {
1288                 wl1271_error("request_irq() failed: %d", ret);
1289                 goto out_free;
1290         }
1291
1292         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1293
1294         disable_irq(wl->irq);
1295
1296         ret = platform_device_register(&wl1271_device);
1297         if (ret) {
1298                 wl1271_error("couldn't register platform device");
1299                 goto out_irq;
1300         }
1301         dev_set_drvdata(&wl1271_device.dev, wl);
1302
1303         ret = wl1271_init_ieee80211(wl);
1304         if (ret)
1305                 goto out_platform;
1306
1307         ret = wl1271_register_hw(wl);
1308         if (ret)
1309                 goto out_platform;
1310
1311         wl1271_debugfs_init(wl);
1312
1313         wl1271_notice("initialized");
1314
1315         return 0;
1316
1317  out_platform:
1318         platform_device_unregister(&wl1271_device);
1319
1320  out_irq:
1321         free_irq(wl->irq, wl);
1322
1323  out_free:
1324         kfree(wl->rx_descriptor);
1325         wl->rx_descriptor = NULL;
1326
1327         ieee80211_free_hw(hw);
1328
1329         return ret;
1330 }
1331
1332 static int __devexit wl1271_remove(struct spi_device *spi)
1333 {
1334         struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1335
1336         ieee80211_unregister_hw(wl->hw);
1337
1338         wl1271_debugfs_exit(wl);
1339         platform_device_unregister(&wl1271_device);
1340         free_irq(wl->irq, wl);
1341         kfree(wl->target_mem_map);
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         kfree(wl->fw_status);
1351         kfree(wl->tx_res_if);
1352
1353         ieee80211_free_hw(wl->hw);
1354
1355         return 0;
1356 }
1357
1358
1359 static struct spi_driver wl1271_spi_driver = {
1360         .driver = {
1361                 .name           = "wl1271",
1362                 .bus            = &spi_bus_type,
1363                 .owner          = THIS_MODULE,
1364         },
1365
1366         .probe          = wl1271_probe,
1367         .remove         = __devexit_p(wl1271_remove),
1368 };
1369
1370 static int __init wl1271_init(void)
1371 {
1372         int ret;
1373
1374         ret = spi_register_driver(&wl1271_spi_driver);
1375         if (ret < 0) {
1376                 wl1271_error("failed to register spi driver: %d", ret);
1377                 goto out;
1378         }
1379
1380 out:
1381         return ret;
1382 }
1383
1384 static void __exit wl1271_exit(void)
1385 {
1386         spi_unregister_driver(&wl1271_spi_driver);
1387
1388         wl1271_notice("unloaded");
1389 }
1390
1391 module_init(wl1271_init);
1392 module_exit(wl1271_exit);
1393
1394 MODULE_LICENSE("GPL");
1395 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");