cc5c3285deacbc764ffc6624230229d51bfa8b38
[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->tx_security_last_seq = 0;
596         wl->tx_security_seq_16 = 0;
597         wl->tx_security_seq_32 = 0;
598         wl->time_offset = 0;
599         wl->session_counter = 0;
600         for (i = 0; i < NUM_TX_QUEUES; i++)
601                 wl->tx_blocks_freed[i] = 0;
602
603         wl1271_debugfs_reset(wl);
604         mutex_unlock(&wl->mutex);
605 }
606
607 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
608                                    struct ieee80211_if_init_conf *conf)
609 {
610         struct wl1271 *wl = hw->priv;
611         int ret = 0;
612
613         wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
614                      conf->type, conf->mac_addr);
615
616         mutex_lock(&wl->mutex);
617
618         switch (conf->type) {
619         case NL80211_IFTYPE_STATION:
620                 wl->bss_type = BSS_TYPE_STA_BSS;
621                 break;
622         case NL80211_IFTYPE_ADHOC:
623                 wl->bss_type = BSS_TYPE_IBSS;
624                 break;
625         default:
626                 ret = -EOPNOTSUPP;
627                 goto out;
628         }
629
630         /* FIXME: what if conf->mac_addr changes? */
631
632 out:
633         mutex_unlock(&wl->mutex);
634         return ret;
635 }
636
637 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
638                                          struct ieee80211_if_init_conf *conf)
639 {
640         wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
641 }
642
643 #if 0
644 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
645                                       struct ieee80211_vif *vif,
646                                       struct ieee80211_if_conf *conf)
647 {
648         struct wl1271 *wl = hw->priv;
649         struct sk_buff *beacon;
650         int ret;
651
652         wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %pM",
653                      conf->bssid);
654         wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
655                           conf->ssid_len);
656
657         mutex_lock(&wl->mutex);
658
659         ret = wl1271_ps_elp_wakeup(wl, false);
660         if (ret < 0)
661                 goto out;
662
663         memcpy(wl->bssid, conf->bssid, ETH_ALEN);
664
665         ret = wl1271_cmd_build_null_data(wl);
666         if (ret < 0)
667                 goto out_sleep;
668
669         wl->ssid_len = conf->ssid_len;
670         if (wl->ssid_len)
671                 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
672
673         if (wl->bss_type != BSS_TYPE_IBSS) {
674                 /* FIXME: replace the magic numbers with proper definitions */
675                 ret = wl1271_cmd_join(wl, wl->bss_type, 5, 100, 1);
676                 if (ret < 0)
677                         goto out_sleep;
678         }
679
680         if (conf->changed & IEEE80211_IFCC_BEACON) {
681                 beacon = ieee80211_beacon_get(hw, vif);
682                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
683                                               beacon->data, beacon->len);
684
685                 if (ret < 0) {
686                         dev_kfree_skb(beacon);
687                         goto out_sleep;
688                 }
689
690                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
691                                               beacon->data, beacon->len);
692
693                 dev_kfree_skb(beacon);
694
695                 if (ret < 0)
696                         goto out_sleep;
697
698                 /* FIXME: replace the magic numbers with proper definitions */
699                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
700
701                 if (ret < 0)
702                         goto out_sleep;
703         }
704
705 out_sleep:
706         wl1271_ps_elp_sleep(wl);
707
708 out:
709         mutex_unlock(&wl->mutex);
710
711         return ret;
712 }
713 #endif
714
715 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
716 {
717         struct wl1271 *wl = hw->priv;
718         struct ieee80211_conf *conf = &hw->conf;
719         int channel, ret = 0;
720
721         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
722
723         wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
724                      channel,
725                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
726                      conf->power_level);
727
728         mutex_lock(&wl->mutex);
729
730         ret = wl1271_ps_elp_wakeup(wl, false);
731         if (ret < 0)
732                 goto out;
733
734         if (channel != wl->channel) {
735                 u8 old_channel = wl->channel;
736                 wl->channel = channel;
737
738                 /* FIXME: use beacon interval provided by mac80211 */
739                 ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
740                 if (ret < 0) {
741                         wl->channel = old_channel;
742                         goto out_sleep;
743                 }
744         }
745
746         ret = wl1271_cmd_build_null_data(wl);
747         if (ret < 0)
748                 goto out_sleep;
749
750         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
751                 wl1271_info("psm enabled");
752
753                 wl->psm_requested = true;
754
755                 /*
756                  * We enter PSM only if we're already associated.
757                  * If we're not, we'll enter it when joining an SSID,
758                  * through the bss_info_changed() hook.
759                  */
760                 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
761         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
762                    wl->psm_requested) {
763                 wl1271_info("psm disabled");
764
765                 wl->psm_requested = false;
766
767                 if (wl->psm)
768                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
769         }
770
771         if (conf->power_level != wl->power_level) {
772                 ret = wl1271_acx_tx_power(wl, conf->power_level);
773                 if (ret < 0)
774                         goto out;
775
776                 wl->power_level = conf->power_level;
777         }
778
779 out_sleep:
780         wl1271_ps_elp_sleep(wl);
781
782 out:
783         mutex_unlock(&wl->mutex);
784
785         return ret;
786 }
787
788 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
789                                   FIF_ALLMULTI | \
790                                   FIF_FCSFAIL | \
791                                   FIF_BCN_PRBRESP_PROMISC | \
792                                   FIF_CONTROL | \
793                                   FIF_OTHER_BSS)
794
795 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
796                                        unsigned int changed,
797                                        unsigned int *total,u64 multicast)
798 {
799         struct wl1271 *wl = hw->priv;
800
801         wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
802
803         *total &= WL1271_SUPPORTED_FILTERS;
804         changed &= WL1271_SUPPORTED_FILTERS;
805
806         if (changed == 0)
807                 return;
808
809         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
810         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
811         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
812
813         /*
814          * FIXME: workqueues need to be properly cancelled on stop(), for
815          * now let's just disable changing the filter settings. They will
816          * be updated any on config().
817          */
818         /* schedule_work(&wl->filter_work); */
819 }
820
821 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
822                              struct ieee80211_vif *vif,
823                              struct ieee80211_sta *sta,
824                              struct ieee80211_key_conf *key_conf)
825 {
826         struct wl1271 *wl = hw->priv;
827         const u8 *addr;
828         int ret;
829         u32 tx_seq_32 = 0;
830         u16 tx_seq_16 = 0;
831         u8 key_type;
832
833         static const u8 bcast_addr[ETH_ALEN] =
834                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
835
836         wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
837
838         addr = sta ? sta->addr : bcast_addr;
839
840         wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
841         wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
842         wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
843                      key_conf->alg, key_conf->keyidx,
844                      key_conf->keylen, key_conf->flags);
845         wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
846
847         if (is_zero_ether_addr(addr)) {
848                 /* We dont support TX only encryption */
849                 ret = -EOPNOTSUPP;
850                 goto out;
851         }
852
853         mutex_lock(&wl->mutex);
854
855         ret = wl1271_ps_elp_wakeup(wl, false);
856         if (ret < 0)
857                 goto out_unlock;
858
859         switch (key_conf->alg) {
860         case ALG_WEP:
861                 key_type = KEY_WEP;
862
863                 key_conf->hw_key_idx = key_conf->keyidx;
864                 break;
865         case ALG_TKIP:
866                 key_type = KEY_TKIP;
867
868                 key_conf->hw_key_idx = key_conf->keyidx;
869                 tx_seq_32 = wl->tx_security_seq_32;
870                 tx_seq_16 = wl->tx_security_seq_16;
871                 break;
872         case ALG_CCMP:
873                 key_type = KEY_AES;
874
875                 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
876                 tx_seq_32 = wl->tx_security_seq_32;
877                 tx_seq_16 = wl->tx_security_seq_16;
878                 break;
879         default:
880                 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
881
882                 ret = -EOPNOTSUPP;
883                 goto out_sleep;
884         }
885
886         switch (cmd) {
887         case SET_KEY:
888                 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
889                                          key_conf->keyidx, key_type,
890                                          key_conf->keylen, key_conf->key,
891                                          addr, tx_seq_32, tx_seq_16);
892                 if (ret < 0) {
893                         wl1271_error("Could not add or replace key");
894                         goto out_sleep;
895                 }
896                 break;
897
898         case DISABLE_KEY:
899                 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
900                                          key_conf->keyidx, key_type,
901                                          key_conf->keylen, key_conf->key,
902                                          addr, 0, 0);
903                 if (ret < 0) {
904                         wl1271_error("Could not remove key");
905                         goto out_sleep;
906                 }
907                 break;
908
909         default:
910                 wl1271_error("Unsupported key cmd 0x%x", cmd);
911                 ret = -EOPNOTSUPP;
912                 goto out_sleep;
913
914                 break;
915         }
916
917 out_sleep:
918         wl1271_ps_elp_sleep(wl);
919
920 out_unlock:
921         mutex_unlock(&wl->mutex);
922
923 out:
924         return ret;
925 }
926
927 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
928                              struct cfg80211_scan_request *req)
929 {
930         struct wl1271 *wl = hw->priv;
931         int ret;
932         u8 *ssid = NULL;
933         size_t ssid_len = 0;
934
935         wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
936
937         if (req->n_ssids) {
938                 ssid = req->ssids[0].ssid;
939                 ssid_len = req->ssids[0].ssid_len;
940         }
941
942         mutex_lock(&wl->mutex);
943
944         ret = wl1271_ps_elp_wakeup(wl, false);
945         if (ret < 0)
946                 goto out;
947
948         ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
949
950         wl1271_ps_elp_sleep(wl);
951
952 out:
953         mutex_unlock(&wl->mutex);
954
955         return ret;
956 }
957
958 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
959 {
960         struct wl1271 *wl = hw->priv;
961         int ret;
962
963         mutex_lock(&wl->mutex);
964
965         ret = wl1271_ps_elp_wakeup(wl, false);
966         if (ret < 0)
967                 goto out;
968
969         ret = wl1271_acx_rts_threshold(wl, (u16) value);
970         if (ret < 0)
971                 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
972
973         wl1271_ps_elp_sleep(wl);
974
975 out:
976         mutex_unlock(&wl->mutex);
977
978         return ret;
979 }
980
981 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
982                                        struct ieee80211_vif *vif,
983                                        struct ieee80211_bss_conf *bss_conf,
984                                        u32 changed)
985 {
986         enum wl1271_cmd_ps_mode mode;
987         struct wl1271 *wl = hw->priv;
988         int ret;
989
990         wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
991
992         mutex_lock(&wl->mutex);
993
994         ret = wl1271_ps_elp_wakeup(wl, false);
995         if (ret < 0)
996                 goto out;
997
998         if (changed & BSS_CHANGED_ASSOC) {
999                 if (bss_conf->assoc) {
1000                         wl->aid = bss_conf->aid;
1001
1002                         ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
1003                         if (ret < 0)
1004                                 goto out_sleep;
1005
1006                         ret = wl1271_acx_aid(wl, wl->aid);
1007                         if (ret < 0)
1008                                 goto out_sleep;
1009
1010                         /* If we want to go in PSM but we're not there yet */
1011                         if (wl->psm_requested && !wl->psm) {
1012                                 mode = STATION_POWER_SAVE_MODE;
1013                                 ret = wl1271_ps_set_mode(wl, mode);
1014                                 if (ret < 0)
1015                                         goto out_sleep;
1016                         }
1017                 }
1018         }
1019         if (changed & BSS_CHANGED_ERP_SLOT) {
1020                 if (bss_conf->use_short_slot)
1021                         ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1022                 else
1023                         ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1024                 if (ret < 0) {
1025                         wl1271_warning("Set slot time failed %d", ret);
1026                         goto out_sleep;
1027                 }
1028         }
1029
1030         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1031                 if (bss_conf->use_short_preamble)
1032                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1033                 else
1034                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1035         }
1036
1037         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1038                 if (bss_conf->use_cts_prot)
1039                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1040                 else
1041                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1042                 if (ret < 0) {
1043                         wl1271_warning("Set ctsprotect failed %d", ret);
1044                         goto out_sleep;
1045                 }
1046         }
1047
1048 out_sleep:
1049         wl1271_ps_elp_sleep(wl);
1050
1051 out:
1052         mutex_unlock(&wl->mutex);
1053 }
1054
1055
1056 /* can't be const, mac80211 writes to this */
1057 static struct ieee80211_rate wl1271_rates[] = {
1058         { .bitrate = 10,
1059           .hw_value = 0x1,
1060           .hw_value_short = 0x1, },
1061         { .bitrate = 20,
1062           .hw_value = 0x2,
1063           .hw_value_short = 0x2,
1064           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1065         { .bitrate = 55,
1066           .hw_value = 0x4,
1067           .hw_value_short = 0x4,
1068           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1069         { .bitrate = 110,
1070           .hw_value = 0x20,
1071           .hw_value_short = 0x20,
1072           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1073         { .bitrate = 60,
1074           .hw_value = 0x8,
1075           .hw_value_short = 0x8, },
1076         { .bitrate = 90,
1077           .hw_value = 0x10,
1078           .hw_value_short = 0x10, },
1079         { .bitrate = 120,
1080           .hw_value = 0x40,
1081           .hw_value_short = 0x40, },
1082         { .bitrate = 180,
1083           .hw_value = 0x80,
1084           .hw_value_short = 0x80, },
1085         { .bitrate = 240,
1086           .hw_value = 0x200,
1087           .hw_value_short = 0x200, },
1088         { .bitrate = 360,
1089          .hw_value = 0x400,
1090          .hw_value_short = 0x400, },
1091         { .bitrate = 480,
1092           .hw_value = 0x800,
1093           .hw_value_short = 0x800, },
1094         { .bitrate = 540,
1095           .hw_value = 0x1000,
1096           .hw_value_short = 0x1000, },
1097 };
1098
1099 /* can't be const, mac80211 writes to this */
1100 static struct ieee80211_channel wl1271_channels[] = {
1101         { .hw_value = 1, .center_freq = 2412},
1102         { .hw_value = 2, .center_freq = 2417},
1103         { .hw_value = 3, .center_freq = 2422},
1104         { .hw_value = 4, .center_freq = 2427},
1105         { .hw_value = 5, .center_freq = 2432},
1106         { .hw_value = 6, .center_freq = 2437},
1107         { .hw_value = 7, .center_freq = 2442},
1108         { .hw_value = 8, .center_freq = 2447},
1109         { .hw_value = 9, .center_freq = 2452},
1110         { .hw_value = 10, .center_freq = 2457},
1111         { .hw_value = 11, .center_freq = 2462},
1112         { .hw_value = 12, .center_freq = 2467},
1113         { .hw_value = 13, .center_freq = 2472},
1114 };
1115
1116 /* can't be const, mac80211 writes to this */
1117 static struct ieee80211_supported_band wl1271_band_2ghz = {
1118         .channels = wl1271_channels,
1119         .n_channels = ARRAY_SIZE(wl1271_channels),
1120         .bitrates = wl1271_rates,
1121         .n_bitrates = ARRAY_SIZE(wl1271_rates),
1122 };
1123
1124 static const struct ieee80211_ops wl1271_ops = {
1125         .start = wl1271_op_start,
1126         .stop = wl1271_op_stop,
1127         .add_interface = wl1271_op_add_interface,
1128         .remove_interface = wl1271_op_remove_interface,
1129         .config = wl1271_op_config,
1130 /*      .config_interface = wl1271_op_config_interface, */
1131         .configure_filter = wl1271_op_configure_filter,
1132         .tx = wl1271_op_tx,
1133         .set_key = wl1271_op_set_key,
1134         .hw_scan = wl1271_op_hw_scan,
1135         .bss_info_changed = wl1271_op_bss_info_changed,
1136         .set_rts_threshold = wl1271_op_set_rts_threshold,
1137 };
1138
1139 static int wl1271_register_hw(struct wl1271 *wl)
1140 {
1141         int ret;
1142
1143         if (wl->mac80211_registered)
1144                 return 0;
1145
1146         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1147
1148         ret = ieee80211_register_hw(wl->hw);
1149         if (ret < 0) {
1150                 wl1271_error("unable to register mac80211 hw: %d", ret);
1151                 return ret;
1152         }
1153
1154         wl->mac80211_registered = true;
1155
1156         wl1271_notice("loaded");
1157
1158         return 0;
1159 }
1160
1161 static int wl1271_init_ieee80211(struct wl1271 *wl)
1162 {
1163         /* The tx descriptor buffer and the TKIP space. */
1164         wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE +
1165                 sizeof(struct wl1271_tx_hw_descr);
1166
1167         /* unit us */
1168         /* FIXME: find a proper value */
1169         wl->hw->channel_change_time = 10000;
1170
1171         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1172                 IEEE80211_HW_NOISE_DBM;
1173
1174         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1175         wl->hw->wiphy->max_scan_ssids = 1;
1176         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1177
1178         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1179
1180         return 0;
1181 }
1182
1183 static void wl1271_device_release(struct device *dev)
1184 {
1185
1186 }
1187
1188 static struct platform_device wl1271_device = {
1189         .name           = "wl1271",
1190         .id             = -1,
1191
1192         /* device model insists to have a release function */
1193         .dev            = {
1194                 .release = wl1271_device_release,
1195         },
1196 };
1197
1198 #define WL1271_DEFAULT_CHANNEL 0
1199 static int __devinit wl1271_probe(struct spi_device *spi)
1200 {
1201         struct wl12xx_platform_data *pdata;
1202         struct ieee80211_hw *hw;
1203         struct wl1271 *wl;
1204         int ret, i;
1205         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1206
1207         pdata = spi->dev.platform_data;
1208         if (!pdata) {
1209                 wl1271_error("no platform data");
1210                 return -ENODEV;
1211         }
1212
1213         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1214         if (!hw) {
1215                 wl1271_error("could not alloc ieee80211_hw");
1216                 return -ENOMEM;
1217         }
1218
1219         wl = hw->priv;
1220         memset(wl, 0, sizeof(*wl));
1221
1222         wl->hw = hw;
1223         dev_set_drvdata(&spi->dev, wl);
1224         wl->spi = spi;
1225
1226         skb_queue_head_init(&wl->tx_queue);
1227
1228         INIT_WORK(&wl->filter_work, wl1271_filter_work);
1229         INIT_DELAYED_WORK(&wl->elp_work, wl1271_elp_work);
1230         wl->channel = WL1271_DEFAULT_CHANNEL;
1231         wl->scanning = false;
1232         wl->default_key = 0;
1233         wl->listen_int = 1;
1234         wl->rx_counter = 0;
1235         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1236         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1237         wl->elp = false;
1238         wl->psm = 0;
1239         wl->psm_requested = false;
1240         wl->tx_queue_stopped = false;
1241         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1242
1243         /* We use the default power on sleep time until we know which chip
1244          * we're using */
1245         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1246                 wl->tx_frames[i] = NULL;
1247
1248         spin_lock_init(&wl->wl_lock);
1249
1250         /*
1251          * In case our MAC address is not correctly set,
1252          * we use a random but Nokia MAC.
1253          */
1254         memcpy(wl->mac_addr, nokia_oui, 3);
1255         get_random_bytes(wl->mac_addr + 3, 3);
1256
1257         wl->state = WL1271_STATE_OFF;
1258         mutex_init(&wl->mutex);
1259
1260         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1261         if (!wl->rx_descriptor) {
1262                 wl1271_error("could not allocate memory for rx descriptor");
1263                 ret = -ENOMEM;
1264                 goto out_free;
1265         }
1266
1267         /* This is the only SPI value that we need to set here, the rest
1268          * comes from the board-peripherals file */
1269         spi->bits_per_word = 32;
1270
1271         ret = spi_setup(spi);
1272         if (ret < 0) {
1273                 wl1271_error("spi_setup failed");
1274                 goto out_free;
1275         }
1276
1277         wl->set_power = pdata->set_power;
1278         if (!wl->set_power) {
1279                 wl1271_error("set power function missing in platform data");
1280                 ret = -ENODEV;
1281                 goto out_free;
1282         }
1283
1284         wl->irq = spi->irq;
1285         if (wl->irq < 0) {
1286                 wl1271_error("irq missing in platform data");
1287                 ret = -ENODEV;
1288                 goto out_free;
1289         }
1290
1291         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1292         if (ret < 0) {
1293                 wl1271_error("request_irq() failed: %d", ret);
1294                 goto out_free;
1295         }
1296
1297         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1298
1299         disable_irq(wl->irq);
1300
1301         ret = platform_device_register(&wl1271_device);
1302         if (ret) {
1303                 wl1271_error("couldn't register platform device");
1304                 goto out_irq;
1305         }
1306         dev_set_drvdata(&wl1271_device.dev, wl);
1307
1308         ret = wl1271_init_ieee80211(wl);
1309         if (ret)
1310                 goto out_platform;
1311
1312         ret = wl1271_register_hw(wl);
1313         if (ret)
1314                 goto out_platform;
1315
1316         wl1271_debugfs_init(wl);
1317
1318         wl1271_notice("initialized");
1319
1320         return 0;
1321
1322  out_platform:
1323         platform_device_unregister(&wl1271_device);
1324
1325  out_irq:
1326         free_irq(wl->irq, wl);
1327
1328  out_free:
1329         kfree(wl->rx_descriptor);
1330         wl->rx_descriptor = NULL;
1331
1332         ieee80211_free_hw(hw);
1333
1334         return ret;
1335 }
1336
1337 static int __devexit wl1271_remove(struct spi_device *spi)
1338 {
1339         struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1340
1341         ieee80211_unregister_hw(wl->hw);
1342
1343         wl1271_debugfs_exit(wl);
1344         platform_device_unregister(&wl1271_device);
1345         free_irq(wl->irq, wl);
1346         kfree(wl->target_mem_map);
1347         kfree(wl->fw);
1348         wl->fw = NULL;
1349         kfree(wl->nvs);
1350         wl->nvs = NULL;
1351
1352         kfree(wl->rx_descriptor);
1353         wl->rx_descriptor = NULL;
1354
1355         kfree(wl->fw_status);
1356         kfree(wl->tx_res_if);
1357
1358         ieee80211_free_hw(wl->hw);
1359
1360         return 0;
1361 }
1362
1363
1364 static struct spi_driver wl1271_spi_driver = {
1365         .driver = {
1366                 .name           = "wl1271",
1367                 .bus            = &spi_bus_type,
1368                 .owner          = THIS_MODULE,
1369         },
1370
1371         .probe          = wl1271_probe,
1372         .remove         = __devexit_p(wl1271_remove),
1373 };
1374
1375 static int __init wl1271_init(void)
1376 {
1377         int ret;
1378
1379         ret = spi_register_driver(&wl1271_spi_driver);
1380         if (ret < 0) {
1381                 wl1271_error("failed to register spi driver: %d", ret);
1382                 goto out;
1383         }
1384
1385 out:
1386         return ret;
1387 }
1388
1389 static void __exit wl1271_exit(void)
1390 {
1391         spi_unregister_driver(&wl1271_spi_driver);
1392
1393         wl1271_notice("unloaded");
1394 }
1395
1396 module_init(wl1271_init);
1397 module_exit(wl1271_exit);
1398
1399 MODULE_LICENSE("GPL");
1400 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");