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