mac80211: extend/document powersave API
[linux-2.6] / drivers / net / wireless / rt2x00 / rt2x00dev.c
1 /*
2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3         <http://rt2x00.serialmonkey.com>
4
5         This program is free software; you can redistribute it and/or modify
6         it under the terms of the GNU General Public License as published by
7         the Free Software Foundation; either version 2 of the License, or
8         (at your option) any later version.
9
10         This program is distributed in the hope that it will be useful,
11         but WITHOUT ANY WARRANTY; without even the implied warranty of
12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13         GNU General Public License for more details.
14
15         You should have received a copy of the GNU General Public License
16         along with this program; if not, write to the
17         Free Software Foundation, Inc.,
18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  */
20
21 /*
22         Module: rt2x00lib
23         Abstract: rt2x00 generic device routines.
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28
29 #include "rt2x00.h"
30 #include "rt2x00lib.h"
31
32 /*
33  * Radio control handlers.
34  */
35 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
36 {
37         int status;
38
39         /*
40          * Don't enable the radio twice.
41          * And check if the hardware button has been disabled.
42          */
43         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
44             test_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags))
45                 return 0;
46
47         /*
48          * Initialize all data queues.
49          */
50         rt2x00queue_init_queues(rt2x00dev);
51
52         /*
53          * Enable radio.
54          */
55         status =
56             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
57         if (status)
58                 return status;
59
60         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
61
62         rt2x00leds_led_radio(rt2x00dev, true);
63         rt2x00led_led_activity(rt2x00dev, true);
64
65         set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);
66
67         /*
68          * Enable RX.
69          */
70         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
71
72         /*
73          * Start the TX queues.
74          */
75         ieee80211_wake_queues(rt2x00dev->hw);
76
77         return 0;
78 }
79
80 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
81 {
82         if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
83                 return;
84
85         /*
86          * Stop the TX queues.
87          */
88         ieee80211_stop_queues(rt2x00dev->hw);
89
90         /*
91          * Disable RX.
92          */
93         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
94
95         /*
96          * Disable radio.
97          */
98         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
99         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
100         rt2x00led_led_activity(rt2x00dev, false);
101         rt2x00leds_led_radio(rt2x00dev, false);
102 }
103
104 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
105 {
106         /*
107          * When we are disabling the RX, we should also stop the link tuner.
108          */
109         if (state == STATE_RADIO_RX_OFF)
110                 rt2x00link_stop_tuner(rt2x00dev);
111
112         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
113
114         /*
115          * When we are enabling the RX, we should also start the link tuner.
116          */
117         if (state == STATE_RADIO_RX_ON)
118                 rt2x00link_start_tuner(rt2x00dev);
119 }
120
121 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
122 {
123         struct rt2x00_dev *rt2x00dev =
124             container_of(work, struct rt2x00_dev, filter_work);
125
126         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
127 }
128
129 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
130                                           struct ieee80211_vif *vif)
131 {
132         struct rt2x00_dev *rt2x00dev = data;
133         struct rt2x00_intf *intf = vif_to_intf(vif);
134         struct ieee80211_bss_conf conf;
135         int delayed_flags;
136
137         /*
138          * Copy all data we need during this action under the protection
139          * of a spinlock. Otherwise race conditions might occur which results
140          * into an invalid configuration.
141          */
142         spin_lock(&intf->lock);
143
144         memcpy(&conf, &vif->bss_conf, sizeof(conf));
145         delayed_flags = intf->delayed_flags;
146         intf->delayed_flags = 0;
147
148         spin_unlock(&intf->lock);
149
150         /*
151          * It is possible the radio was disabled while the work had been
152          * scheduled. If that happens we should return here immediately,
153          * note that in the spinlock protected area above the delayed_flags
154          * have been cleared correctly.
155          */
156         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
157                 return;
158
159         if (delayed_flags & DELAYED_UPDATE_BEACON)
160                 rt2x00queue_update_beacon(rt2x00dev, vif);
161
162         if (delayed_flags & DELAYED_CONFIG_ERP)
163                 rt2x00lib_config_erp(rt2x00dev, intf, &conf);
164
165         if (delayed_flags & DELAYED_LED_ASSOC)
166                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
167 }
168
169 static void rt2x00lib_intf_scheduled(struct work_struct *work)
170 {
171         struct rt2x00_dev *rt2x00dev =
172             container_of(work, struct rt2x00_dev, intf_work);
173
174         /*
175          * Iterate over each interface and perform the
176          * requested configurations.
177          */
178         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
179                                             rt2x00lib_intf_scheduled_iter,
180                                             rt2x00dev);
181 }
182
183 /*
184  * Interrupt context handlers.
185  */
186 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
187                                       struct ieee80211_vif *vif)
188 {
189         struct rt2x00_dev *rt2x00dev = data;
190         struct rt2x00_intf *intf = vif_to_intf(vif);
191
192         if (vif->type != NL80211_IFTYPE_AP &&
193             vif->type != NL80211_IFTYPE_ADHOC &&
194             vif->type != NL80211_IFTYPE_MESH_POINT &&
195             vif->type != NL80211_IFTYPE_WDS)
196                 return;
197
198         /*
199          * Clean up the beacon skb.
200          */
201         rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
202         intf->beacon->skb = NULL;
203
204         spin_lock(&intf->lock);
205         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
206         spin_unlock(&intf->lock);
207 }
208
209 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
210 {
211         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
212                 return;
213
214         ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
215                                                    rt2x00lib_beacondone_iter,
216                                                    rt2x00dev);
217
218         schedule_work(&rt2x00dev->intf_work);
219 }
220 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
221
222 void rt2x00lib_txdone(struct queue_entry *entry,
223                       struct txdone_entry_desc *txdesc)
224 {
225         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
226         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
227         struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
228         enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
229         u8 rate_idx, rate_flags;
230
231         /*
232          * Unmap the skb.
233          */
234         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
235
236         /*
237          * If the IV/EIV data was stripped from the frame before it was
238          * passed to the hardware, we should now reinsert it again because
239          * mac80211 will expect the the same data to be present it the
240          * frame as it was passed to us.
241          */
242         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
243                 rt2x00crypto_tx_insert_iv(entry->skb);
244
245         /*
246          * Send frame to debugfs immediately, after this call is completed
247          * we are going to overwrite the skb->cb array.
248          */
249         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
250
251         /*
252          * Update TX statistics.
253          */
254         rt2x00dev->link.qual.tx_success +=
255             test_bit(TXDONE_SUCCESS, &txdesc->flags);
256         rt2x00dev->link.qual.tx_failed +=
257             test_bit(TXDONE_FAILURE, &txdesc->flags);
258
259         rate_idx = skbdesc->tx_rate_idx;
260         rate_flags = skbdesc->tx_rate_flags;
261
262         /*
263          * Initialize TX status
264          */
265         memset(&tx_info->status, 0, sizeof(tx_info->status));
266         tx_info->status.ack_signal = 0;
267         tx_info->status.rates[0].idx = rate_idx;
268         tx_info->status.rates[0].flags = rate_flags;
269         tx_info->status.rates[0].count = txdesc->retry + 1;
270         tx_info->status.rates[1].idx = -1; /* terminate */
271
272         if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
273                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
274                         tx_info->flags |= IEEE80211_TX_STAT_ACK;
275                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
276                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
277         }
278
279         if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
280                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
281                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
282                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
283                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
284         }
285
286         /*
287          * Only send the status report to mac80211 when TX status was
288          * requested by it. If this was a extra frame coming through
289          * a mac80211 library call (RTS/CTS) then we should not send the
290          * status report back.
291          */
292         if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
293                 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
294         else
295                 dev_kfree_skb_irq(entry->skb);
296
297         /*
298          * Make this entry available for reuse.
299          */
300         entry->skb = NULL;
301         entry->flags = 0;
302
303         rt2x00dev->ops->lib->clear_entry(entry);
304
305         clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
306         rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
307
308         /*
309          * If the data queue was below the threshold before the txdone
310          * handler we must make sure the packet queue in the mac80211 stack
311          * is reenabled when the txdone handler has finished.
312          */
313         if (!rt2x00queue_threshold(entry->queue))
314                 ieee80211_wake_queue(rt2x00dev->hw, qid);
315 }
316 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
317
318 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
319                       struct queue_entry *entry)
320 {
321         struct rxdone_entry_desc rxdesc;
322         struct sk_buff *skb;
323         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
324         struct ieee80211_supported_band *sband;
325         const struct rt2x00_rate *rate;
326         unsigned int header_length;
327         unsigned int align;
328         unsigned int i;
329         int idx = -1;
330
331         /*
332          * Allocate a new sk_buffer. If no new buffer available, drop the
333          * received frame and reuse the existing buffer.
334          */
335         skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
336         if (!skb)
337                 return;
338
339         /*
340          * Unmap the skb.
341          */
342         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
343
344         /*
345          * Extract the RXD details.
346          */
347         memset(&rxdesc, 0, sizeof(rxdesc));
348         rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
349
350         /*
351          * The data behind the ieee80211 header must be
352          * aligned on a 4 byte boundary.
353          */
354         header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
355         align = ((unsigned long)(entry->skb->data + header_length)) & 3;
356
357         /*
358          * Hardware might have stripped the IV/EIV/ICV data,
359          * in that case it is possible that the data was
360          * provided seperately (through hardware descriptor)
361          * in which case we should reinsert the data into the frame.
362          */
363         if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
364             (rxdesc.flags & RX_FLAG_IV_STRIPPED)) {
365                 rt2x00crypto_rx_insert_iv(entry->skb, align,
366                                           header_length, &rxdesc);
367         } else if (align) {
368                 skb_push(entry->skb, align);
369                 /* Move entire frame in 1 command */
370                 memmove(entry->skb->data, entry->skb->data + align,
371                         rxdesc.size);
372         }
373
374         /* Update data pointers, trim buffer to correct size */
375         skb_trim(entry->skb, rxdesc.size);
376
377         /*
378          * Update RX statistics.
379          */
380         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
381         for (i = 0; i < sband->n_bitrates; i++) {
382                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
383
384                 if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
385                      (rate->plcp == rxdesc.signal)) ||
386                     ((rxdesc.dev_flags & RXDONE_SIGNAL_BITRATE) &&
387                       (rate->bitrate == rxdesc.signal))) {
388                         idx = i;
389                         break;
390                 }
391         }
392
393         if (idx < 0) {
394                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
395                         "signal=0x%.2x, type=%d.\n", rxdesc.signal,
396                         (rxdesc.dev_flags & RXDONE_SIGNAL_MASK));
397                 idx = 0;
398         }
399
400         /*
401          * Update extra components
402          */
403         rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
404         rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
405
406         rx_status->mactime = rxdesc.timestamp;
407         rx_status->rate_idx = idx;
408         rx_status->qual = rt2x00link_calculate_signal(rt2x00dev, rxdesc.rssi);
409         rx_status->signal = rxdesc.rssi;
410         rx_status->noise = rxdesc.noise;
411         rx_status->flag = rxdesc.flags;
412         rx_status->antenna = rt2x00dev->link.ant.active.rx;
413
414         /*
415          * Send frame to mac80211 & debugfs.
416          * mac80211 will clean up the skb structure.
417          */
418         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
419         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
420
421         /*
422          * Replace the skb with the freshly allocated one.
423          */
424         entry->skb = skb;
425         entry->flags = 0;
426
427         rt2x00dev->ops->lib->clear_entry(entry);
428
429         rt2x00queue_index_inc(entry->queue, Q_INDEX);
430 }
431 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
432
433 /*
434  * Driver initialization handlers.
435  */
436 const struct rt2x00_rate rt2x00_supported_rates[12] = {
437         {
438                 .flags = DEV_RATE_CCK,
439                 .bitrate = 10,
440                 .ratemask = BIT(0),
441                 .plcp = 0x00,
442         },
443         {
444                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
445                 .bitrate = 20,
446                 .ratemask = BIT(1),
447                 .plcp = 0x01,
448         },
449         {
450                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
451                 .bitrate = 55,
452                 .ratemask = BIT(2),
453                 .plcp = 0x02,
454         },
455         {
456                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
457                 .bitrate = 110,
458                 .ratemask = BIT(3),
459                 .plcp = 0x03,
460         },
461         {
462                 .flags = DEV_RATE_OFDM,
463                 .bitrate = 60,
464                 .ratemask = BIT(4),
465                 .plcp = 0x0b,
466         },
467         {
468                 .flags = DEV_RATE_OFDM,
469                 .bitrate = 90,
470                 .ratemask = BIT(5),
471                 .plcp = 0x0f,
472         },
473         {
474                 .flags = DEV_RATE_OFDM,
475                 .bitrate = 120,
476                 .ratemask = BIT(6),
477                 .plcp = 0x0a,
478         },
479         {
480                 .flags = DEV_RATE_OFDM,
481                 .bitrate = 180,
482                 .ratemask = BIT(7),
483                 .plcp = 0x0e,
484         },
485         {
486                 .flags = DEV_RATE_OFDM,
487                 .bitrate = 240,
488                 .ratemask = BIT(8),
489                 .plcp = 0x09,
490         },
491         {
492                 .flags = DEV_RATE_OFDM,
493                 .bitrate = 360,
494                 .ratemask = BIT(9),
495                 .plcp = 0x0d,
496         },
497         {
498                 .flags = DEV_RATE_OFDM,
499                 .bitrate = 480,
500                 .ratemask = BIT(10),
501                 .plcp = 0x08,
502         },
503         {
504                 .flags = DEV_RATE_OFDM,
505                 .bitrate = 540,
506                 .ratemask = BIT(11),
507                 .plcp = 0x0c,
508         },
509 };
510
511 static void rt2x00lib_channel(struct ieee80211_channel *entry,
512                               const int channel, const int tx_power,
513                               const int value)
514 {
515         entry->center_freq = ieee80211_channel_to_frequency(channel);
516         entry->hw_value = value;
517         entry->max_power = tx_power;
518         entry->max_antenna_gain = 0xff;
519 }
520
521 static void rt2x00lib_rate(struct ieee80211_rate *entry,
522                            const u16 index, const struct rt2x00_rate *rate)
523 {
524         entry->flags = 0;
525         entry->bitrate = rate->bitrate;
526         entry->hw_value =index;
527         entry->hw_value_short = index;
528
529         if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
530                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
531 }
532
533 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
534                                     struct hw_mode_spec *spec)
535 {
536         struct ieee80211_hw *hw = rt2x00dev->hw;
537         struct ieee80211_channel *channels;
538         struct ieee80211_rate *rates;
539         unsigned int num_rates;
540         unsigned int i;
541
542         num_rates = 0;
543         if (spec->supported_rates & SUPPORT_RATE_CCK)
544                 num_rates += 4;
545         if (spec->supported_rates & SUPPORT_RATE_OFDM)
546                 num_rates += 8;
547
548         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
549         if (!channels)
550                 return -ENOMEM;
551
552         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
553         if (!rates)
554                 goto exit_free_channels;
555
556         /*
557          * Initialize Rate list.
558          */
559         for (i = 0; i < num_rates; i++)
560                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
561
562         /*
563          * Initialize Channel list.
564          */
565         for (i = 0; i < spec->num_channels; i++) {
566                 rt2x00lib_channel(&channels[i],
567                                   spec->channels[i].channel,
568                                   spec->channels_info[i].tx_power1, i);
569         }
570
571         /*
572          * Intitialize 802.11b, 802.11g
573          * Rates: CCK, OFDM.
574          * Channels: 2.4 GHz
575          */
576         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
577                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
578                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
579                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
580                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
581                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
582                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
583         }
584
585         /*
586          * Intitialize 802.11a
587          * Rates: OFDM.
588          * Channels: OFDM, UNII, HiperLAN2.
589          */
590         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
591                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
592                     spec->num_channels - 14;
593                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
594                     num_rates - 4;
595                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
596                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
597                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
598                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
599         }
600
601         return 0;
602
603  exit_free_channels:
604         kfree(channels);
605         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
606         return -ENOMEM;
607 }
608
609 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
610 {
611         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
612                 ieee80211_unregister_hw(rt2x00dev->hw);
613
614         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
615                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
616                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
617                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
618                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
619         }
620
621         kfree(rt2x00dev->spec.channels_info);
622 }
623
624 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
625 {
626         struct hw_mode_spec *spec = &rt2x00dev->spec;
627         int status;
628
629         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
630                 return 0;
631
632         /*
633          * Initialize HW modes.
634          */
635         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
636         if (status)
637                 return status;
638
639         /*
640          * Initialize HW fields.
641          */
642         rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
643
644         /*
645          * Register HW.
646          */
647         status = ieee80211_register_hw(rt2x00dev->hw);
648         if (status) {
649                 rt2x00lib_remove_hw(rt2x00dev);
650                 return status;
651         }
652
653         set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
654
655         return 0;
656 }
657
658 /*
659  * Initialization/uninitialization handlers.
660  */
661 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
662 {
663         if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
664                 return;
665
666         /*
667          * Unregister extra components.
668          */
669         rt2x00rfkill_unregister(rt2x00dev);
670
671         /*
672          * Allow the HW to uninitialize.
673          */
674         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
675
676         /*
677          * Free allocated queue entries.
678          */
679         rt2x00queue_uninitialize(rt2x00dev);
680 }
681
682 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
683 {
684         int status;
685
686         if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
687                 return 0;
688
689         /*
690          * Allocate all queue entries.
691          */
692         status = rt2x00queue_initialize(rt2x00dev);
693         if (status)
694                 return status;
695
696         /*
697          * Initialize the device.
698          */
699         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
700         if (status) {
701                 rt2x00queue_uninitialize(rt2x00dev);
702                 return status;
703         }
704
705         set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
706
707         /*
708          * Register the extra components.
709          */
710         rt2x00rfkill_register(rt2x00dev);
711
712         return 0;
713 }
714
715 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
716 {
717         int retval;
718
719         if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
720                 return 0;
721
722         /*
723          * If this is the first interface which is added,
724          * we should load the firmware now.
725          */
726         retval = rt2x00lib_load_firmware(rt2x00dev);
727         if (retval)
728                 return retval;
729
730         /*
731          * Initialize the device.
732          */
733         retval = rt2x00lib_initialize(rt2x00dev);
734         if (retval)
735                 return retval;
736
737         rt2x00dev->intf_ap_count = 0;
738         rt2x00dev->intf_sta_count = 0;
739         rt2x00dev->intf_associated = 0;
740
741         set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
742
743         return 0;
744 }
745
746 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
747 {
748         if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
749                 return;
750
751         /*
752          * Perhaps we can add something smarter here,
753          * but for now just disabling the radio should do.
754          */
755         rt2x00lib_disable_radio(rt2x00dev);
756
757         rt2x00dev->intf_ap_count = 0;
758         rt2x00dev->intf_sta_count = 0;
759         rt2x00dev->intf_associated = 0;
760 }
761
762 /*
763  * driver allocation handlers.
764  */
765 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
766 {
767         int retval = -ENOMEM;
768
769         mutex_init(&rt2x00dev->csr_mutex);
770
771         /*
772          * Make room for rt2x00_intf inside the per-interface
773          * structure ieee80211_vif.
774          */
775         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
776
777         /*
778          * Determine which operating modes are supported, all modes
779          * which require beaconing, depend on the availability of
780          * beacon entries.
781          */
782         rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
783         if (rt2x00dev->ops->bcn->entry_num > 0)
784                 rt2x00dev->hw->wiphy->interface_modes |=
785                     BIT(NL80211_IFTYPE_ADHOC) |
786                     BIT(NL80211_IFTYPE_AP) |
787                     BIT(NL80211_IFTYPE_MESH_POINT) |
788                     BIT(NL80211_IFTYPE_WDS);
789
790         /*
791          * Let the driver probe the device to detect the capabilities.
792          */
793         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
794         if (retval) {
795                 ERROR(rt2x00dev, "Failed to allocate device.\n");
796                 goto exit;
797         }
798
799         /*
800          * Initialize configuration work.
801          */
802         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
803         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
804
805         /*
806          * Allocate queue array.
807          */
808         retval = rt2x00queue_allocate(rt2x00dev);
809         if (retval)
810                 goto exit;
811
812         /*
813          * Initialize ieee80211 structure.
814          */
815         retval = rt2x00lib_probe_hw(rt2x00dev);
816         if (retval) {
817                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
818                 goto exit;
819         }
820
821         /*
822          * Register extra components.
823          */
824         rt2x00link_register(rt2x00dev);
825         rt2x00leds_register(rt2x00dev);
826         rt2x00rfkill_allocate(rt2x00dev);
827         rt2x00debug_register(rt2x00dev);
828
829         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
830
831         return 0;
832
833 exit:
834         rt2x00lib_remove_dev(rt2x00dev);
835
836         return retval;
837 }
838 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
839
840 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
841 {
842         clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
843
844         /*
845          * Disable radio.
846          */
847         rt2x00lib_disable_radio(rt2x00dev);
848
849         /*
850          * Uninitialize device.
851          */
852         rt2x00lib_uninitialize(rt2x00dev);
853
854         /*
855          * Free extra components
856          */
857         rt2x00debug_deregister(rt2x00dev);
858         rt2x00rfkill_free(rt2x00dev);
859         rt2x00leds_unregister(rt2x00dev);
860
861         /*
862          * Free ieee80211_hw memory.
863          */
864         rt2x00lib_remove_hw(rt2x00dev);
865
866         /*
867          * Free firmware image.
868          */
869         rt2x00lib_free_firmware(rt2x00dev);
870
871         /*
872          * Free queue structures.
873          */
874         rt2x00queue_free(rt2x00dev);
875 }
876 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
877
878 /*
879  * Device state handlers
880  */
881 #ifdef CONFIG_PM
882 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
883 {
884         int retval;
885
886         NOTICE(rt2x00dev, "Going to sleep.\n");
887
888         /*
889          * Only continue if mac80211 has open interfaces.
890          */
891         if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
892             !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
893                 goto exit;
894
895         set_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags);
896
897         /*
898          * Disable radio.
899          */
900         rt2x00lib_stop(rt2x00dev);
901         rt2x00lib_uninitialize(rt2x00dev);
902
903         /*
904          * Suspend/disable extra components.
905          */
906         rt2x00leds_suspend(rt2x00dev);
907         rt2x00debug_deregister(rt2x00dev);
908
909 exit:
910         /*
911          * Set device mode to sleep for power management,
912          * on some hardware this call seems to consistently fail.
913          * From the specifications it is hard to tell why it fails,
914          * and if this is a "bad thing".
915          * Overall it is safe to just ignore the failure and
916          * continue suspending. The only downside is that the
917          * device will not be in optimal power save mode, but with
918          * the radio and the other components already disabled the
919          * device is as good as disabled.
920          */
921         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
922         if (retval)
923                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
924                         "continue suspending.\n");
925
926         return 0;
927 }
928 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
929
930 static void rt2x00lib_resume_intf(void *data, u8 *mac,
931                                   struct ieee80211_vif *vif)
932 {
933         struct rt2x00_dev *rt2x00dev = data;
934         struct rt2x00_intf *intf = vif_to_intf(vif);
935
936         spin_lock(&intf->lock);
937
938         rt2x00lib_config_intf(rt2x00dev, intf,
939                               vif->type, intf->mac, intf->bssid);
940
941
942         /*
943          * AP, Ad-hoc, and Mesh Point mode require a new beacon update.
944          */
945         if (vif->type == NL80211_IFTYPE_AP ||
946             vif->type == NL80211_IFTYPE_ADHOC ||
947             vif->type == NL80211_IFTYPE_MESH_POINT ||
948             vif->type == NL80211_IFTYPE_WDS)
949                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
950
951         spin_unlock(&intf->lock);
952 }
953
954 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
955 {
956         int retval;
957
958         NOTICE(rt2x00dev, "Waking up.\n");
959
960         /*
961          * Restore/enable extra components.
962          */
963         rt2x00debug_register(rt2x00dev);
964         rt2x00leds_resume(rt2x00dev);
965
966         /*
967          * Only continue if mac80211 had open interfaces.
968          */
969         if (!test_and_clear_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags))
970                 return 0;
971
972         /*
973          * Reinitialize device and all active interfaces.
974          */
975         retval = rt2x00lib_start(rt2x00dev);
976         if (retval)
977                 goto exit;
978
979         /*
980          * Reconfigure device.
981          */
982         retval = rt2x00mac_config(rt2x00dev->hw, ~0);
983         if (retval)
984                 goto exit;
985
986         /*
987          * Iterator over each active interface to
988          * reconfigure the hardware.
989          */
990         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
991                                             rt2x00lib_resume_intf, rt2x00dev);
992
993         /*
994          * We are ready again to receive requests from mac80211.
995          */
996         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
997
998         /*
999          * It is possible that during that mac80211 has attempted
1000          * to send frames while we were suspending or resuming.
1001          * In that case we have disabled the TX queue and should
1002          * now enable it again
1003          */
1004         ieee80211_wake_queues(rt2x00dev->hw);
1005
1006         /*
1007          * During interface iteration we might have changed the
1008          * delayed_flags, time to handles the event by calling
1009          * the work handler directly.
1010          */
1011         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1012
1013         return 0;
1014
1015 exit:
1016         rt2x00lib_stop(rt2x00dev);
1017         rt2x00lib_uninitialize(rt2x00dev);
1018         rt2x00debug_deregister(rt2x00dev);
1019
1020         return retval;
1021 }
1022 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1023 #endif /* CONFIG_PM */
1024
1025 /*
1026  * rt2x00lib module information.
1027  */
1028 MODULE_AUTHOR(DRV_PROJECT);
1029 MODULE_VERSION(DRV_VERSION);
1030 MODULE_DESCRIPTION("rt2x00 library");
1031 MODULE_LICENSE("GPL");