wl1271: remove unnecessary joins and join only when the bssid changes
[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/vmalloc.h>
34 #include <linux/spi/wl12xx.h>
35
36 #include "wl1271.h"
37 #include "wl12xx_80211.h"
38 #include "wl1271_reg.h"
39 #include "wl1271_spi.h"
40 #include "wl1271_event.h"
41 #include "wl1271_tx.h"
42 #include "wl1271_rx.h"
43 #include "wl1271_ps.h"
44 #include "wl1271_init.h"
45 #include "wl1271_debugfs.h"
46 #include "wl1271_cmd.h"
47 #include "wl1271_boot.h"
48
49 static int wl1271_plt_init(struct wl1271 *wl)
50 {
51         int ret;
52
53         ret = wl1271_acx_init_mem_config(wl);
54         if (ret < 0)
55                 return ret;
56
57         ret = wl1271_cmd_data_path(wl, wl->channel, 1);
58         if (ret < 0)
59                 return ret;
60
61         return 0;
62 }
63
64 static void wl1271_disable_interrupts(struct wl1271 *wl)
65 {
66         disable_irq(wl->irq);
67 }
68
69 static void wl1271_power_off(struct wl1271 *wl)
70 {
71         wl->set_power(false);
72 }
73
74 static void wl1271_power_on(struct wl1271 *wl)
75 {
76         wl->set_power(true);
77 }
78
79 static void wl1271_fw_status(struct wl1271 *wl,
80                              struct wl1271_fw_status *status)
81 {
82         u32 total = 0;
83         int i;
84
85         wl1271_spi_read(wl, FW_STATUS_ADDR, status,
86                         sizeof(*status), false);
87
88         wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
89                      "drv_rx_counter = %d, tx_results_counter = %d)",
90                      status->intr,
91                      status->fw_rx_counter,
92                      status->drv_rx_counter,
93                      status->tx_results_counter);
94
95         /* update number of available TX blocks */
96         for (i = 0; i < NUM_TX_QUEUES; i++) {
97                 u32 cnt = status->tx_released_blks[i] - wl->tx_blocks_freed[i];
98                 wl->tx_blocks_freed[i] = status->tx_released_blks[i];
99                 wl->tx_blocks_available += cnt;
100                 total += cnt;
101         }
102
103         /* if more blocks are available now, schedule some tx work */
104         if (total && !skb_queue_empty(&wl->tx_queue))
105                 ieee80211_queue_work(wl->hw, &wl->tx_work);
106
107         /* update the host-chipset time offset */
108         wl->time_offset = jiffies_to_usecs(jiffies) - status->fw_localtime;
109 }
110
111 static void wl1271_irq_work(struct work_struct *work)
112 {
113         int ret;
114         u32 intr;
115         struct wl1271 *wl =
116                 container_of(work, struct wl1271, irq_work);
117
118         mutex_lock(&wl->mutex);
119
120         wl1271_debug(DEBUG_IRQ, "IRQ work");
121
122         if (wl->state == WL1271_STATE_OFF)
123                 goto out;
124
125         ret = wl1271_ps_elp_wakeup(wl, true);
126         if (ret < 0)
127                 goto out;
128
129         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
130
131         wl1271_fw_status(wl, wl->fw_status);
132         intr = wl->fw_status->intr;
133         if (!intr) {
134                 wl1271_debug(DEBUG_IRQ, "Zero interrupt received.");
135                 goto out_sleep;
136         }
137
138         intr &= WL1271_INTR_MASK;
139
140         if (intr & (WL1271_ACX_INTR_EVENT_A |
141                     WL1271_ACX_INTR_EVENT_B)) {
142                 wl1271_debug(DEBUG_IRQ,
143                              "WL1271_ACX_INTR_EVENT (0x%x)", intr);
144                 if (intr & WL1271_ACX_INTR_EVENT_A)
145                         wl1271_event_handle(wl, 0);
146                 else
147                         wl1271_event_handle(wl, 1);
148         }
149
150         if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
151                 wl1271_debug(DEBUG_IRQ,
152                              "WL1271_ACX_INTR_INIT_COMPLETE");
153
154         if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
155                 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
156
157         if (intr & WL1271_ACX_INTR_DATA) {
158                 u8 tx_res_cnt = wl->fw_status->tx_results_counter -
159                         wl->tx_results_count;
160
161                 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
162
163                 /* check for tx results */
164                 if (tx_res_cnt)
165                         wl1271_tx_complete(wl, tx_res_cnt);
166
167                 wl1271_rx(wl, wl->fw_status);
168         }
169
170 out_sleep:
171         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_MASK,
172                            WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
173         wl1271_ps_elp_sleep(wl);
174
175 out:
176         mutex_unlock(&wl->mutex);
177 }
178
179 static irqreturn_t wl1271_irq(int irq, void *cookie)
180 {
181         struct wl1271 *wl;
182         unsigned long flags;
183
184         wl1271_debug(DEBUG_IRQ, "IRQ");
185
186         wl = cookie;
187
188         /* complete the ELP completion */
189         spin_lock_irqsave(&wl->wl_lock, flags);
190         if (wl->elp_compl) {
191                 complete(wl->elp_compl);
192                 wl->elp_compl = NULL;
193         }
194
195         ieee80211_queue_work(wl->hw, &wl->irq_work);
196         spin_unlock_irqrestore(&wl->wl_lock, flags);
197
198         return IRQ_HANDLED;
199 }
200
201 static int wl1271_fetch_firmware(struct wl1271 *wl)
202 {
203         const struct firmware *fw;
204         int ret;
205
206         ret = request_firmware(&fw, WL1271_FW_NAME, &wl->spi->dev);
207
208         if (ret < 0) {
209                 wl1271_error("could not get firmware: %d", ret);
210                 return ret;
211         }
212
213         if (fw->size % 4) {
214                 wl1271_error("firmware size is not multiple of 32 bits: %zu",
215                              fw->size);
216                 ret = -EILSEQ;
217                 goto out;
218         }
219
220         wl->fw_len = fw->size;
221         wl->fw = vmalloc(wl->fw_len);
222
223         if (!wl->fw) {
224                 wl1271_error("could not allocate memory for the firmware");
225                 ret = -ENOMEM;
226                 goto out;
227         }
228
229         memcpy(wl->fw, fw->data, wl->fw_len);
230
231         ret = 0;
232
233 out:
234         release_firmware(fw);
235
236         return ret;
237 }
238
239 static int wl1271_fetch_nvs(struct wl1271 *wl)
240 {
241         const struct firmware *fw;
242         int ret;
243
244         ret = request_firmware(&fw, WL1271_NVS_NAME, &wl->spi->dev);
245
246         if (ret < 0) {
247                 wl1271_error("could not get nvs file: %d", ret);
248                 return ret;
249         }
250
251         if (fw->size % 4) {
252                 wl1271_error("nvs size is not multiple of 32 bits: %zu",
253                              fw->size);
254                 ret = -EILSEQ;
255                 goto out;
256         }
257
258         wl->nvs_len = fw->size;
259         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
260
261         if (!wl->nvs) {
262                 wl1271_error("could not allocate memory for the nvs file");
263                 ret = -ENOMEM;
264                 goto out;
265         }
266
267         memcpy(wl->nvs, fw->data, wl->nvs_len);
268
269         ret = 0;
270
271 out:
272         release_firmware(fw);
273
274         return ret;
275 }
276
277 static void wl1271_fw_wakeup(struct wl1271 *wl)
278 {
279         u32 elp_reg;
280
281         elp_reg = ELPCTRL_WAKE_UP;
282         wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
283 }
284
285 static int wl1271_setup(struct wl1271 *wl)
286 {
287         wl->fw_status = kmalloc(sizeof(*wl->fw_status), GFP_KERNEL);
288         if (!wl->fw_status)
289                 return -ENOMEM;
290
291         wl->tx_res_if = kmalloc(sizeof(*wl->tx_res_if), GFP_KERNEL);
292         if (!wl->tx_res_if) {
293                 kfree(wl->fw_status);
294                 return -ENOMEM;
295         }
296
297         INIT_WORK(&wl->irq_work, wl1271_irq_work);
298         INIT_WORK(&wl->tx_work, wl1271_tx_work);
299         return 0;
300 }
301
302 static int wl1271_chip_wakeup(struct wl1271 *wl)
303 {
304         struct wl1271_partition_set partition;
305         int ret = 0;
306
307         wl1271_power_on(wl);
308         msleep(WL1271_POWER_ON_SLEEP);
309         wl1271_spi_reset(wl);
310         wl1271_spi_init(wl);
311
312         /* We don't need a real memory partition here, because we only want
313          * to use the registers at this point. */
314         memset(&partition, 0, sizeof(partition));
315         partition.reg.start = REGISTERS_BASE;
316         partition.reg.size = REGISTERS_DOWN_SIZE;
317         wl1271_set_partition(wl, &partition);
318
319         /* ELP module wake up */
320         wl1271_fw_wakeup(wl);
321
322         /* whal_FwCtrl_BootSm() */
323
324         /* 0. read chip id from CHIP_ID */
325         wl->chip.id = wl1271_spi_read32(wl, CHIP_ID_B);
326
327         /* 1. check if chip id is valid */
328
329         switch (wl->chip.id) {
330         case CHIP_ID_1271_PG10:
331                 wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
332                                wl->chip.id);
333
334                 ret = wl1271_setup(wl);
335                 if (ret < 0)
336                         goto out;
337                 break;
338         case CHIP_ID_1271_PG20:
339                 wl1271_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
340                              wl->chip.id);
341
342                 ret = wl1271_setup(wl);
343                 if (ret < 0)
344                         goto out;
345                 break;
346         default:
347                 wl1271_error("unsupported chip id: 0x%x", wl->chip.id);
348                 ret = -ENODEV;
349                 goto out;
350         }
351
352         if (wl->fw == NULL) {
353                 ret = wl1271_fetch_firmware(wl);
354                 if (ret < 0)
355                         goto out;
356         }
357
358         /* No NVS from netlink, try to get it from the filesystem */
359         if (wl->nvs == NULL) {
360                 ret = wl1271_fetch_nvs(wl);
361                 if (ret < 0)
362                         goto out;
363         }
364
365 out:
366         return ret;
367 }
368
369 struct wl1271_filter_params {
370         unsigned int filters;
371         unsigned int changed;
372         int mc_list_length;
373         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
374 };
375
376 #define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
377                                   FIF_ALLMULTI | \
378                                   FIF_FCSFAIL | \
379                                   FIF_BCN_PRBRESP_PROMISC | \
380                                   FIF_CONTROL | \
381                                   FIF_OTHER_BSS)
382
383 static void wl1271_filter_work(struct work_struct *work)
384 {
385         struct wl1271 *wl =
386                 container_of(work, struct wl1271, filter_work);
387         struct wl1271_filter_params *fp;
388         unsigned long flags;
389         bool enabled = true;
390         int ret;
391
392         /* first, get the filter parameters */
393         spin_lock_irqsave(&wl->wl_lock, flags);
394         fp = wl->filter_params;
395         wl->filter_params = NULL;
396         spin_unlock_irqrestore(&wl->wl_lock, flags);
397
398         if (!fp)
399                 return;
400
401         /* then, lock the mutex without risk of lock-up */
402         mutex_lock(&wl->mutex);
403
404         if (wl->state == WL1271_STATE_OFF)
405                 goto out;
406
407         ret = wl1271_ps_elp_wakeup(wl, false);
408         if (ret < 0)
409                 goto out;
410
411         /* configure the mc filter regardless of the changed flags */
412         if (fp->filters & FIF_ALLMULTI)
413                 enabled = false;
414
415         ret = wl1271_acx_group_address_tbl(wl, enabled,
416                                            fp->mc_list, fp->mc_list_length);
417         if (ret < 0)
418                 goto out_sleep;
419
420         /* determine, whether supported filter values have changed */
421         if (fp->changed == 0)
422                 goto out;
423
424         /* apply configured filters */
425         ret = wl1271_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
426         if (ret < 0)
427                 goto out_sleep;
428
429 out_sleep:
430         wl1271_ps_elp_sleep(wl);
431
432 out:
433         mutex_unlock(&wl->mutex);
434         kfree(fp);
435 }
436
437 int wl1271_plt_start(struct wl1271 *wl)
438 {
439         int ret;
440
441         mutex_lock(&wl->mutex);
442
443         wl1271_notice("power up");
444
445         if (wl->state != WL1271_STATE_OFF) {
446                 wl1271_error("cannot go into PLT state because not "
447                              "in off state: %d", wl->state);
448                 ret = -EBUSY;
449                 goto out;
450         }
451
452         wl->state = WL1271_STATE_PLT;
453
454         ret = wl1271_chip_wakeup(wl);
455         if (ret < 0)
456                 goto out;
457
458         ret = wl1271_boot(wl);
459         if (ret < 0)
460                 goto out;
461
462         wl1271_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
463
464         ret = wl1271_plt_init(wl);
465         if (ret < 0)
466                 goto out;
467
468 out:
469         mutex_unlock(&wl->mutex);
470
471         return ret;
472 }
473
474 int wl1271_plt_stop(struct wl1271 *wl)
475 {
476         int ret = 0;
477
478         mutex_lock(&wl->mutex);
479
480         wl1271_notice("power down");
481
482         if (wl->state != WL1271_STATE_PLT) {
483                 wl1271_error("cannot power down because not in PLT "
484                              "state: %d", wl->state);
485                 ret = -EBUSY;
486                 goto out;
487         }
488
489         wl1271_disable_interrupts(wl);
490         wl1271_power_off(wl);
491
492         wl->state = WL1271_STATE_OFF;
493
494 out:
495         mutex_unlock(&wl->mutex);
496
497         return ret;
498 }
499
500
501 static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
502 {
503         struct wl1271 *wl = hw->priv;
504
505         skb_queue_tail(&wl->tx_queue, skb);
506
507         /*
508          * The chip specific setup must run before the first TX packet -
509          * before that, the tx_work will not be initialized!
510          */
511
512         ieee80211_queue_work(wl->hw, &wl->tx_work);
513
514         /*
515          * The workqueue is slow to process the tx_queue and we need stop
516          * the queue here, otherwise the queue will get too long.
517          */
518         if (skb_queue_len(&wl->tx_queue) >= WL1271_TX_QUEUE_MAX_LENGTH) {
519                 ieee80211_stop_queues(wl->hw);
520
521                 /*
522                  * FIXME: this is racy, the variable is not properly
523                  * protected. Maybe fix this by removing the stupid
524                  * variable altogether and checking the real queue state?
525                  */
526                 wl->tx_queue_stopped = true;
527         }
528
529         return NETDEV_TX_OK;
530 }
531
532 static int wl1271_op_start(struct ieee80211_hw *hw)
533 {
534         struct wl1271 *wl = hw->priv;
535         int ret = 0;
536
537         wl1271_debug(DEBUG_MAC80211, "mac80211 start");
538
539         mutex_lock(&wl->mutex);
540
541         if (wl->state != WL1271_STATE_OFF) {
542                 wl1271_error("cannot start because not in off state: %d",
543                              wl->state);
544                 ret = -EBUSY;
545                 goto out;
546         }
547
548         ret = wl1271_chip_wakeup(wl);
549         if (ret < 0)
550                 goto out;
551
552         ret = wl1271_boot(wl);
553         if (ret < 0)
554                 goto out;
555
556         ret = wl1271_hw_init(wl);
557         if (ret < 0)
558                 goto out;
559
560         wl->state = WL1271_STATE_ON;
561
562         wl1271_info("firmware booted (%s)", wl->chip.fw_ver);
563
564 out:
565         if (ret < 0)
566                 wl1271_power_off(wl);
567
568         mutex_unlock(&wl->mutex);
569
570         return ret;
571 }
572
573 static void wl1271_op_stop(struct ieee80211_hw *hw)
574 {
575         struct wl1271 *wl = hw->priv;
576         unsigned long flags;
577         int i;
578
579         wl1271_info("down");
580
581         wl1271_debug(DEBUG_MAC80211, "mac80211 stop");
582
583         /* complete/cancel ongoing work */
584         cancel_work_sync(&wl->filter_work);
585         spin_lock_irqsave(&wl->wl_lock, flags);
586         kfree(wl->filter_params);
587         wl->filter_params = NULL;
588         spin_unlock_irqrestore(&wl->wl_lock, flags);
589
590         mutex_lock(&wl->mutex);
591
592         WARN_ON(wl->state != WL1271_STATE_ON);
593
594         if (wl->scanning) {
595                 mutex_unlock(&wl->mutex);
596                 ieee80211_scan_completed(wl->hw, true);
597                 mutex_lock(&wl->mutex);
598                 wl->scanning = false;
599         }
600
601         wl->state = WL1271_STATE_OFF;
602
603         wl1271_disable_interrupts(wl);
604
605         mutex_unlock(&wl->mutex);
606
607         cancel_work_sync(&wl->irq_work);
608         cancel_work_sync(&wl->tx_work);
609         cancel_work_sync(&wl->filter_work);
610
611         mutex_lock(&wl->mutex);
612
613         /* let's notify MAC80211 about the remaining pending TX frames */
614         wl1271_tx_flush(wl);
615         wl1271_power_off(wl);
616
617         memset(wl->bssid, 0, ETH_ALEN);
618         memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
619         wl->ssid_len = 0;
620         wl->listen_int = 1;
621         wl->bss_type = MAX_BSS_TYPE;
622         wl->band = IEEE80211_BAND_2GHZ;
623
624         wl->rx_counter = 0;
625         wl->elp = false;
626         wl->psm = 0;
627         wl->tx_queue_stopped = false;
628         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
629         wl->tx_blocks_available = 0;
630         wl->tx_results_count = 0;
631         wl->tx_packets_count = 0;
632         wl->tx_security_last_seq = 0;
633         wl->tx_security_seq_16 = 0;
634         wl->tx_security_seq_32 = 0;
635         wl->time_offset = 0;
636         wl->session_counter = 0;
637         wl->joined = false;
638
639         for (i = 0; i < NUM_TX_QUEUES; i++)
640                 wl->tx_blocks_freed[i] = 0;
641
642         wl1271_debugfs_reset(wl);
643         mutex_unlock(&wl->mutex);
644 }
645
646 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
647                                    struct ieee80211_if_init_conf *conf)
648 {
649         struct wl1271 *wl = hw->priv;
650         int ret = 0;
651
652         wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
653                      conf->type, conf->mac_addr);
654
655         mutex_lock(&wl->mutex);
656         if (wl->vif) {
657                 ret = -EBUSY;
658                 goto out;
659         }
660
661         wl->vif = conf->vif;
662
663         switch (conf->type) {
664         case NL80211_IFTYPE_STATION:
665                 wl->bss_type = BSS_TYPE_STA_BSS;
666                 break;
667         case NL80211_IFTYPE_ADHOC:
668                 wl->bss_type = BSS_TYPE_IBSS;
669                 break;
670         default:
671                 ret = -EOPNOTSUPP;
672                 goto out;
673         }
674
675         /* FIXME: what if conf->mac_addr changes? */
676
677 out:
678         mutex_unlock(&wl->mutex);
679         return ret;
680 }
681
682 static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
683                                          struct ieee80211_if_init_conf *conf)
684 {
685         struct wl1271 *wl = hw->priv;
686
687         mutex_lock(&wl->mutex);
688         wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
689         wl->vif = NULL;
690         mutex_unlock(&wl->mutex);
691 }
692
693 #if 0
694 static int wl1271_op_config_interface(struct ieee80211_hw *hw,
695                                       struct ieee80211_vif *vif,
696                                       struct ieee80211_if_conf *conf)
697 {
698         struct wl1271 *wl = hw->priv;
699         struct sk_buff *beacon;
700         int ret;
701
702         wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %pM",
703                      conf->bssid);
704         wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
705                           conf->ssid_len);
706
707         mutex_lock(&wl->mutex);
708
709         ret = wl1271_ps_elp_wakeup(wl, false);
710         if (ret < 0)
711                 goto out;
712
713         if (memcmp(wl->bssid, conf->bssid, ETH_ALEN)) {
714                 wl1271_debug(DEBUG_MAC80211, "bssid changed");
715
716                 memcpy(wl->bssid, conf->bssid, ETH_ALEN);
717
718                 ret = wl1271_cmd_join(wl);
719                 if (ret < 0)
720                         goto out_sleep;
721         }
722
723         ret = wl1271_cmd_build_null_data(wl);
724         if (ret < 0)
725                 goto out_sleep;
726
727         wl->ssid_len = conf->ssid_len;
728         if (wl->ssid_len)
729                 memcpy(wl->ssid, conf->ssid, wl->ssid_len);
730
731         if (conf->changed & IEEE80211_IFCC_BEACON) {
732                 beacon = ieee80211_beacon_get(hw, vif);
733                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
734                                               beacon->data, beacon->len);
735
736                 if (ret < 0) {
737                         dev_kfree_skb(beacon);
738                         goto out_sleep;
739                 }
740
741                 ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
742                                               beacon->data, beacon->len);
743
744                 dev_kfree_skb(beacon);
745
746                 if (ret < 0)
747                         goto out_sleep;
748         }
749
750 out_sleep:
751         wl1271_ps_elp_sleep(wl);
752
753 out:
754         mutex_unlock(&wl->mutex);
755
756         return ret;
757 }
758 #endif
759
760 static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
761 {
762         struct wl1271 *wl = hw->priv;
763         struct ieee80211_conf *conf = &hw->conf;
764         int channel, ret = 0;
765
766         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
767
768         wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
769                      channel,
770                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
771                      conf->power_level);
772
773         mutex_lock(&wl->mutex);
774
775         wl->band = conf->channel->band;
776
777         ret = wl1271_ps_elp_wakeup(wl, false);
778         if (ret < 0)
779                 goto out;
780
781         if (channel != wl->channel) {
782                 /*
783                  * We assume that the stack will configure the right channel
784                  * before associating, so we don't need to send a join
785                  * command here.  We will join the right channel when the
786                  * BSSID changes
787                  */
788                 wl->channel = channel;
789         }
790
791         ret = wl1271_cmd_build_null_data(wl);
792         if (ret < 0)
793                 goto out_sleep;
794
795         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
796                 wl1271_info("psm enabled");
797
798                 wl->psm_requested = true;
799
800                 /*
801                  * We enter PSM only if we're already associated.
802                  * If we're not, we'll enter it when joining an SSID,
803                  * through the bss_info_changed() hook.
804                  */
805                 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
806         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
807                    wl->psm_requested) {
808                 wl1271_info("psm disabled");
809
810                 wl->psm_requested = false;
811
812                 if (wl->psm)
813                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
814         }
815
816         if (conf->power_level != wl->power_level) {
817                 ret = wl1271_acx_tx_power(wl, conf->power_level);
818                 if (ret < 0)
819                         goto out;
820
821                 wl->power_level = conf->power_level;
822         }
823
824 out_sleep:
825         wl1271_ps_elp_sleep(wl);
826
827 out:
828         mutex_unlock(&wl->mutex);
829
830         return ret;
831 }
832
833 static u64 wl1271_op_prepare_multicast(struct ieee80211_hw *hw, int mc_count,
834                                        struct dev_addr_list *mc_list)
835 {
836         struct wl1271 *wl = hw->priv;
837         struct wl1271_filter_params *fp;
838         unsigned long flags;
839         int i;
840
841         /*
842          * FIXME: we should return a hash that will be passed to
843          * configure_filter() instead of saving everything in the context.
844          */
845
846         fp = kzalloc(sizeof(*fp), GFP_KERNEL);
847         if (!fp) {
848                 wl1271_error("Out of memory setting filters.");
849                 return 0;
850         }
851
852         /* update multicast filtering parameters */
853         if (mc_count > ACX_MC_ADDRESS_GROUP_MAX) {
854                 mc_count = 0;
855                 fp->filters |= FIF_ALLMULTI;
856         }
857
858         fp->mc_list_length = 0;
859         for (i = 0; i < mc_count; i++) {
860                 if (mc_list->da_addrlen == ETH_ALEN) {
861                         memcpy(fp->mc_list[fp->mc_list_length],
862                                mc_list->da_addr, ETH_ALEN);
863                         fp->mc_list_length++;
864                 } else
865                         wl1271_warning("Unknown mc address length.");
866         }
867
868         /* FIXME: We still need to set our filters properly */
869
870         spin_lock_irqsave(&wl->wl_lock, flags);
871         kfree(wl->filter_params);
872         wl->filter_params = fp;
873         spin_unlock_irqrestore(&wl->wl_lock, flags);
874
875         return 1;
876 }
877
878 static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
879                                        unsigned int changed,
880                                        unsigned int *total, u64 multicast)
881 {
882         struct wl1271 *wl = hw->priv;
883
884         wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
885
886         *total &= WL1271_SUPPORTED_FILTERS;
887         changed &= WL1271_SUPPORTED_FILTERS;
888
889         if (!multicast)
890                 return;
891
892         /*
893          * FIXME: for now we are still using a workqueue for filter
894          * configuration, but with the new mac80211, this is not needed,
895          * since configure_filter can now sleep.  We now have
896          * prepare_multicast, which needs to be atomic instead.
897          */
898
899         /* store current filter config */
900         wl->filter_params->filters = *total;
901         wl->filter_params->changed = changed;
902
903         ieee80211_queue_work(wl->hw, &wl->filter_work);
904 }
905
906 static int wl1271_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
907                              struct ieee80211_vif *vif,
908                              struct ieee80211_sta *sta,
909                              struct ieee80211_key_conf *key_conf)
910 {
911         struct wl1271 *wl = hw->priv;
912         const u8 *addr;
913         int ret;
914         u32 tx_seq_32 = 0;
915         u16 tx_seq_16 = 0;
916         u8 key_type;
917
918         static const u8 bcast_addr[ETH_ALEN] =
919                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
920
921         wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
922
923         addr = sta ? sta->addr : bcast_addr;
924
925         wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
926         wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
927         wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
928                      key_conf->alg, key_conf->keyidx,
929                      key_conf->keylen, key_conf->flags);
930         wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
931
932         if (is_zero_ether_addr(addr)) {
933                 /* We dont support TX only encryption */
934                 ret = -EOPNOTSUPP;
935                 goto out;
936         }
937
938         mutex_lock(&wl->mutex);
939
940         ret = wl1271_ps_elp_wakeup(wl, false);
941         if (ret < 0)
942                 goto out_unlock;
943
944         switch (key_conf->alg) {
945         case ALG_WEP:
946                 key_type = KEY_WEP;
947
948                 key_conf->hw_key_idx = key_conf->keyidx;
949                 break;
950         case ALG_TKIP:
951                 key_type = KEY_TKIP;
952
953                 key_conf->hw_key_idx = key_conf->keyidx;
954                 tx_seq_32 = wl->tx_security_seq_32;
955                 tx_seq_16 = wl->tx_security_seq_16;
956                 break;
957         case ALG_CCMP:
958                 key_type = KEY_AES;
959
960                 key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
961                 tx_seq_32 = wl->tx_security_seq_32;
962                 tx_seq_16 = wl->tx_security_seq_16;
963                 break;
964         default:
965                 wl1271_error("Unknown key algo 0x%x", key_conf->alg);
966
967                 ret = -EOPNOTSUPP;
968                 goto out_sleep;
969         }
970
971         switch (cmd) {
972         case SET_KEY:
973                 ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
974                                          key_conf->keyidx, key_type,
975                                          key_conf->keylen, key_conf->key,
976                                          addr, tx_seq_32, tx_seq_16);
977                 if (ret < 0) {
978                         wl1271_error("Could not add or replace key");
979                         goto out_sleep;
980                 }
981                 break;
982
983         case DISABLE_KEY:
984                 ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
985                                          key_conf->keyidx, key_type,
986                                          key_conf->keylen, key_conf->key,
987                                          addr, 0, 0);
988                 if (ret < 0) {
989                         wl1271_error("Could not remove key");
990                         goto out_sleep;
991                 }
992                 break;
993
994         default:
995                 wl1271_error("Unsupported key cmd 0x%x", cmd);
996                 ret = -EOPNOTSUPP;
997                 goto out_sleep;
998
999                 break;
1000         }
1001
1002 out_sleep:
1003         wl1271_ps_elp_sleep(wl);
1004
1005 out_unlock:
1006         mutex_unlock(&wl->mutex);
1007
1008 out:
1009         return ret;
1010 }
1011
1012 static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
1013                              struct cfg80211_scan_request *req)
1014 {
1015         struct wl1271 *wl = hw->priv;
1016         int ret;
1017         u8 *ssid = NULL;
1018         size_t ssid_len = 0;
1019
1020         wl1271_debug(DEBUG_MAC80211, "mac80211 hw scan");
1021
1022         if (req->n_ssids) {
1023                 ssid = req->ssids[0].ssid;
1024                 ssid_len = req->ssids[0].ssid_len;
1025         }
1026
1027         mutex_lock(&wl->mutex);
1028
1029         ret = wl1271_ps_elp_wakeup(wl, false);
1030         if (ret < 0)
1031                 goto out;
1032
1033         ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1034
1035         wl1271_ps_elp_sleep(wl);
1036
1037 out:
1038         mutex_unlock(&wl->mutex);
1039
1040         return ret;
1041 }
1042
1043 static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1044 {
1045         struct wl1271 *wl = hw->priv;
1046         int ret;
1047
1048         mutex_lock(&wl->mutex);
1049
1050         ret = wl1271_ps_elp_wakeup(wl, false);
1051         if (ret < 0)
1052                 goto out;
1053
1054         ret = wl1271_acx_rts_threshold(wl, (u16) value);
1055         if (ret < 0)
1056                 wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
1057
1058         wl1271_ps_elp_sleep(wl);
1059
1060 out:
1061         mutex_unlock(&wl->mutex);
1062
1063         return ret;
1064 }
1065
1066 static u32 wl1271_enabled_rates_get(struct wl1271 *wl, u64 basic_rate_set)
1067 {
1068         struct ieee80211_supported_band *band;
1069         u32 enabled_rates = 0;
1070         int bit;
1071
1072         band = wl->hw->wiphy->bands[wl->band];
1073         for (bit = 0; bit < band->n_bitrates; bit++) {
1074                 if (basic_rate_set & 0x1)
1075                         enabled_rates |= band->bitrates[bit].hw_value;
1076                 basic_rate_set >>= 1;
1077         }
1078
1079         return enabled_rates;
1080 }
1081
1082 static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
1083                                        struct ieee80211_vif *vif,
1084                                        struct ieee80211_bss_conf *bss_conf,
1085                                        u32 changed)
1086 {
1087         enum wl1271_cmd_ps_mode mode;
1088         struct wl1271 *wl = hw->priv;
1089         int ret;
1090
1091         wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1092
1093         mutex_lock(&wl->mutex);
1094
1095         ret = wl1271_ps_elp_wakeup(wl, false);
1096         if (ret < 0)
1097                 goto out;
1098
1099         if (changed & BSS_CHANGED_ASSOC) {
1100                 if (bss_conf->assoc) {
1101                         wl->aid = bss_conf->aid;
1102
1103                         /*
1104                          * with wl1271, we don't need to update the
1105                          * beacon_int and dtim_period, because the firmware
1106                          * updates it by itself when the first beacon is
1107                          * received after a join.
1108                          */
1109                         ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
1110                         if (ret < 0)
1111                                 goto out_sleep;
1112
1113                         ret = wl1271_acx_aid(wl, wl->aid);
1114                         if (ret < 0)
1115                                 goto out_sleep;
1116
1117                         /* If we want to go in PSM but we're not there yet */
1118                         if (wl->psm_requested && !wl->psm) {
1119                                 mode = STATION_POWER_SAVE_MODE;
1120                                 ret = wl1271_ps_set_mode(wl, mode);
1121                                 if (ret < 0)
1122                                         goto out_sleep;
1123                         }
1124                 } else {
1125                         /* use defaults when not associated */
1126                         wl->basic_rate_set = WL1271_DEFAULT_BASIC_RATE_SET;
1127                         wl->aid = 0;
1128                 }
1129
1130         }
1131
1132         if (changed & BSS_CHANGED_ERP_SLOT) {
1133                 if (bss_conf->use_short_slot)
1134                         ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
1135                 else
1136                         ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
1137                 if (ret < 0) {
1138                         wl1271_warning("Set slot time failed %d", ret);
1139                         goto out_sleep;
1140                 }
1141         }
1142
1143         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1144                 if (bss_conf->use_short_preamble)
1145                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1146                 else
1147                         wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1148         }
1149
1150         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1151                 if (bss_conf->use_cts_prot)
1152                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1153                 else
1154                         ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1155                 if (ret < 0) {
1156                         wl1271_warning("Set ctsprotect failed %d", ret);
1157                         goto out_sleep;
1158                 }
1159         }
1160
1161         if (changed & BSS_CHANGED_BASIC_RATES) {
1162                 wl->basic_rate_set = wl1271_enabled_rates_get(
1163                         wl, bss_conf->basic_rates);
1164
1165                 ret = wl1271_acx_rate_policies(wl, wl->basic_rate_set);
1166                 if (ret < 0) {
1167                         wl1271_warning("Set rate policies failed %d", ret);
1168                         goto out_sleep;
1169                 }
1170         }
1171
1172 out_sleep:
1173         wl1271_ps_elp_sleep(wl);
1174
1175 out:
1176         mutex_unlock(&wl->mutex);
1177 }
1178
1179
1180 /* can't be const, mac80211 writes to this */
1181 static struct ieee80211_rate wl1271_rates[] = {
1182         { .bitrate = 10,
1183           .hw_value = 0x1,
1184           .hw_value_short = 0x1, },
1185         { .bitrate = 20,
1186           .hw_value = 0x2,
1187           .hw_value_short = 0x2,
1188           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1189         { .bitrate = 55,
1190           .hw_value = 0x4,
1191           .hw_value_short = 0x4,
1192           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1193         { .bitrate = 110,
1194           .hw_value = 0x20,
1195           .hw_value_short = 0x20,
1196           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1197         { .bitrate = 60,
1198           .hw_value = 0x8,
1199           .hw_value_short = 0x8, },
1200         { .bitrate = 90,
1201           .hw_value = 0x10,
1202           .hw_value_short = 0x10, },
1203         { .bitrate = 120,
1204           .hw_value = 0x40,
1205           .hw_value_short = 0x40, },
1206         { .bitrate = 180,
1207           .hw_value = 0x80,
1208           .hw_value_short = 0x80, },
1209         { .bitrate = 240,
1210           .hw_value = 0x200,
1211           .hw_value_short = 0x200, },
1212         { .bitrate = 360,
1213          .hw_value = 0x400,
1214          .hw_value_short = 0x400, },
1215         { .bitrate = 480,
1216           .hw_value = 0x800,
1217           .hw_value_short = 0x800, },
1218         { .bitrate = 540,
1219           .hw_value = 0x1000,
1220           .hw_value_short = 0x1000, },
1221 };
1222
1223 /* can't be const, mac80211 writes to this */
1224 static struct ieee80211_channel wl1271_channels[] = {
1225         { .hw_value = 1, .center_freq = 2412},
1226         { .hw_value = 2, .center_freq = 2417},
1227         { .hw_value = 3, .center_freq = 2422},
1228         { .hw_value = 4, .center_freq = 2427},
1229         { .hw_value = 5, .center_freq = 2432},
1230         { .hw_value = 6, .center_freq = 2437},
1231         { .hw_value = 7, .center_freq = 2442},
1232         { .hw_value = 8, .center_freq = 2447},
1233         { .hw_value = 9, .center_freq = 2452},
1234         { .hw_value = 10, .center_freq = 2457},
1235         { .hw_value = 11, .center_freq = 2462},
1236         { .hw_value = 12, .center_freq = 2467},
1237         { .hw_value = 13, .center_freq = 2472},
1238 };
1239
1240 /* can't be const, mac80211 writes to this */
1241 static struct ieee80211_supported_band wl1271_band_2ghz = {
1242         .channels = wl1271_channels,
1243         .n_channels = ARRAY_SIZE(wl1271_channels),
1244         .bitrates = wl1271_rates,
1245         .n_bitrates = ARRAY_SIZE(wl1271_rates),
1246 };
1247
1248 static const struct ieee80211_ops wl1271_ops = {
1249         .start = wl1271_op_start,
1250         .stop = wl1271_op_stop,
1251         .add_interface = wl1271_op_add_interface,
1252         .remove_interface = wl1271_op_remove_interface,
1253         .config = wl1271_op_config,
1254 /*      .config_interface = wl1271_op_config_interface, */
1255         .prepare_multicast = wl1271_op_prepare_multicast,
1256         .configure_filter = wl1271_op_configure_filter,
1257         .tx = wl1271_op_tx,
1258         .set_key = wl1271_op_set_key,
1259         .hw_scan = wl1271_op_hw_scan,
1260         .bss_info_changed = wl1271_op_bss_info_changed,
1261         .set_rts_threshold = wl1271_op_set_rts_threshold,
1262 };
1263
1264 static int wl1271_register_hw(struct wl1271 *wl)
1265 {
1266         int ret;
1267
1268         if (wl->mac80211_registered)
1269                 return 0;
1270
1271         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1272
1273         ret = ieee80211_register_hw(wl->hw);
1274         if (ret < 0) {
1275                 wl1271_error("unable to register mac80211 hw: %d", ret);
1276                 return ret;
1277         }
1278
1279         wl->mac80211_registered = true;
1280
1281         wl1271_notice("loaded");
1282
1283         return 0;
1284 }
1285
1286 static int wl1271_init_ieee80211(struct wl1271 *wl)
1287 {
1288         /* The tx descriptor buffer and the TKIP space. */
1289         wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE +
1290                 sizeof(struct wl1271_tx_hw_descr);
1291
1292         /* unit us */
1293         /* FIXME: find a proper value */
1294         wl->hw->channel_change_time = 10000;
1295
1296         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1297                 IEEE80211_HW_NOISE_DBM |
1298                 IEEE80211_HW_BEACON_FILTER;
1299
1300         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1301         wl->hw->wiphy->max_scan_ssids = 1;
1302         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
1303
1304         SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
1305
1306         return 0;
1307 }
1308
1309 static void wl1271_device_release(struct device *dev)
1310 {
1311
1312 }
1313
1314 static struct platform_device wl1271_device = {
1315         .name           = "wl1271",
1316         .id             = -1,
1317
1318         /* device model insists to have a release function */
1319         .dev            = {
1320                 .release = wl1271_device_release,
1321         },
1322 };
1323
1324 #define WL1271_DEFAULT_CHANNEL 0
1325 static int __devinit wl1271_probe(struct spi_device *spi)
1326 {
1327         struct wl12xx_platform_data *pdata;
1328         struct ieee80211_hw *hw;
1329         struct wl1271 *wl;
1330         int ret, i;
1331         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1332
1333         pdata = spi->dev.platform_data;
1334         if (!pdata) {
1335                 wl1271_error("no platform data");
1336                 return -ENODEV;
1337         }
1338
1339         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
1340         if (!hw) {
1341                 wl1271_error("could not alloc ieee80211_hw");
1342                 return -ENOMEM;
1343         }
1344
1345         wl = hw->priv;
1346         memset(wl, 0, sizeof(*wl));
1347
1348         wl->hw = hw;
1349         dev_set_drvdata(&spi->dev, wl);
1350         wl->spi = spi;
1351
1352         skb_queue_head_init(&wl->tx_queue);
1353
1354         INIT_WORK(&wl->filter_work, wl1271_filter_work);
1355         INIT_DELAYED_WORK(&wl->elp_work, wl1271_elp_work);
1356         wl->channel = WL1271_DEFAULT_CHANNEL;
1357         wl->scanning = false;
1358         wl->default_key = 0;
1359         wl->listen_int = 1;
1360         wl->rx_counter = 0;
1361         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
1362         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
1363         wl->elp = false;
1364         wl->psm = 0;
1365         wl->psm_requested = false;
1366         wl->tx_queue_stopped = false;
1367         wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
1368         wl->basic_rate_set = WL1271_DEFAULT_BASIC_RATE_SET;
1369         wl->band = IEEE80211_BAND_2GHZ;
1370         wl->vif = NULL;
1371         wl->joined = false;
1372
1373         for (i = 0; i < ACX_TX_DESCRIPTORS; i++)
1374                 wl->tx_frames[i] = NULL;
1375
1376         spin_lock_init(&wl->wl_lock);
1377
1378         /*
1379          * In case our MAC address is not correctly set,
1380          * we use a random but Nokia MAC.
1381          */
1382         memcpy(wl->mac_addr, nokia_oui, 3);
1383         get_random_bytes(wl->mac_addr + 3, 3);
1384
1385         wl->state = WL1271_STATE_OFF;
1386         mutex_init(&wl->mutex);
1387
1388         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1389         if (!wl->rx_descriptor) {
1390                 wl1271_error("could not allocate memory for rx descriptor");
1391                 ret = -ENOMEM;
1392                 goto out_free;
1393         }
1394
1395         /* This is the only SPI value that we need to set here, the rest
1396          * comes from the board-peripherals file */
1397         spi->bits_per_word = 32;
1398
1399         ret = spi_setup(spi);
1400         if (ret < 0) {
1401                 wl1271_error("spi_setup failed");
1402                 goto out_free;
1403         }
1404
1405         wl->set_power = pdata->set_power;
1406         if (!wl->set_power) {
1407                 wl1271_error("set power function missing in platform data");
1408                 ret = -ENODEV;
1409                 goto out_free;
1410         }
1411
1412         wl->irq = spi->irq;
1413         if (wl->irq < 0) {
1414                 wl1271_error("irq missing in platform data");
1415                 ret = -ENODEV;
1416                 goto out_free;
1417         }
1418
1419         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
1420         if (ret < 0) {
1421                 wl1271_error("request_irq() failed: %d", ret);
1422                 goto out_free;
1423         }
1424
1425         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
1426
1427         disable_irq(wl->irq);
1428
1429         ret = platform_device_register(&wl1271_device);
1430         if (ret) {
1431                 wl1271_error("couldn't register platform device");
1432                 goto out_irq;
1433         }
1434         dev_set_drvdata(&wl1271_device.dev, wl);
1435
1436         ret = wl1271_init_ieee80211(wl);
1437         if (ret)
1438                 goto out_platform;
1439
1440         ret = wl1271_register_hw(wl);
1441         if (ret)
1442                 goto out_platform;
1443
1444         wl1271_debugfs_init(wl);
1445
1446         wl1271_notice("initialized");
1447
1448         return 0;
1449
1450  out_platform:
1451         platform_device_unregister(&wl1271_device);
1452
1453  out_irq:
1454         free_irq(wl->irq, wl);
1455
1456  out_free:
1457         kfree(wl->rx_descriptor);
1458         wl->rx_descriptor = NULL;
1459
1460         ieee80211_free_hw(hw);
1461
1462         return ret;
1463 }
1464
1465 static int __devexit wl1271_remove(struct spi_device *spi)
1466 {
1467         struct wl1271 *wl = dev_get_drvdata(&spi->dev);
1468
1469         ieee80211_unregister_hw(wl->hw);
1470
1471         wl1271_debugfs_exit(wl);
1472         platform_device_unregister(&wl1271_device);
1473         free_irq(wl->irq, wl);
1474         kfree(wl->target_mem_map);
1475         vfree(wl->fw);
1476         wl->fw = NULL;
1477         kfree(wl->nvs);
1478         wl->nvs = NULL;
1479
1480         kfree(wl->rx_descriptor);
1481         wl->rx_descriptor = NULL;
1482
1483         kfree(wl->fw_status);
1484         kfree(wl->tx_res_if);
1485
1486         ieee80211_free_hw(wl->hw);
1487
1488         return 0;
1489 }
1490
1491
1492 static struct spi_driver wl1271_spi_driver = {
1493         .driver = {
1494                 .name           = "wl1271",
1495                 .bus            = &spi_bus_type,
1496                 .owner          = THIS_MODULE,
1497         },
1498
1499         .probe          = wl1271_probe,
1500         .remove         = __devexit_p(wl1271_remove),
1501 };
1502
1503 static int __init wl1271_init(void)
1504 {
1505         int ret;
1506
1507         ret = spi_register_driver(&wl1271_spi_driver);
1508         if (ret < 0) {
1509                 wl1271_error("failed to register spi driver: %d", ret);
1510                 goto out;
1511         }
1512
1513 out:
1514         return ret;
1515 }
1516
1517 static void __exit wl1271_exit(void)
1518 {
1519         spi_unregister_driver(&wl1271_spi_driver);
1520
1521         wl1271_notice("unloaded");
1522 }
1523
1524 module_init(wl1271_init);
1525 module_exit(wl1271_exit);
1526
1527 MODULE_LICENSE("GPL");
1528 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
1529 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");