db54fcc94c8f62f0749105fdc60cabf17a7d061f
[pandora-kernel.git] / drivers / net / wireless / rt2x00 / rt2x00dev.c
1 /*
2         Copyright (C) 2004 - 2009 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                 return 0;
45
46         /*
47          * Initialize all data queues.
48          */
49         rt2x00queue_init_queues(rt2x00dev);
50
51         /*
52          * Enable radio.
53          */
54         status =
55             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
56         if (status)
57                 return status;
58
59         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
60
61         rt2x00leds_led_radio(rt2x00dev, true);
62         rt2x00led_led_activity(rt2x00dev, true);
63
64         set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);
65
66         /*
67          * Enable RX.
68          */
69         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
70
71         /*
72          * Start the TX queues.
73          */
74         ieee80211_wake_queues(rt2x00dev->hw);
75
76         return 0;
77 }
78
79 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
80 {
81         if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
82                 return;
83
84         /*
85          * Stop the TX queues in mac80211.
86          */
87         ieee80211_stop_queues(rt2x00dev->hw);
88         rt2x00queue_stop_queues(rt2x00dev);
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, true);
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         ieee80211_queue_work(rt2x00dev->hw, &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         unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
230         u8 rate_idx, rate_flags;
231
232         /*
233          * Unmap the skb.
234          */
235         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
236
237         /*
238          * Remove L2 padding which was added during
239          */
240         if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
241                 rt2x00queue_payload_align(entry->skb, true, header_length);
242
243         /*
244          * If the IV/EIV data was stripped from the frame before it was
245          * passed to the hardware, we should now reinsert it again because
246          * mac80211 will expect the the same data to be present it the
247          * frame as it was passed to us.
248          */
249         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
250                 rt2x00crypto_tx_insert_iv(entry->skb, header_length);
251
252         /*
253          * Send frame to debugfs immediately, after this call is completed
254          * we are going to overwrite the skb->cb array.
255          */
256         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
257
258         /*
259          * Update TX statistics.
260          */
261         rt2x00dev->link.qual.tx_success +=
262             test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
263             test_bit(TXDONE_UNKNOWN, &txdesc->flags);
264         rt2x00dev->link.qual.tx_failed +=
265             test_bit(TXDONE_FAILURE, &txdesc->flags);
266
267         rate_idx = skbdesc->tx_rate_idx;
268         rate_flags = skbdesc->tx_rate_flags;
269
270         /*
271          * Initialize TX status
272          */
273         memset(&tx_info->status, 0, sizeof(tx_info->status));
274         tx_info->status.ack_signal = 0;
275         tx_info->status.rates[0].idx = rate_idx;
276         tx_info->status.rates[0].flags = rate_flags;
277         tx_info->status.rates[0].count = txdesc->retry + 1;
278         tx_info->status.rates[1].idx = -1; /* terminate */
279
280         if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
281                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
282                                 test_bit(TXDONE_UNKNOWN, &txdesc->flags))
283                         tx_info->flags |= IEEE80211_TX_STAT_ACK;
284                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
285                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
286         }
287
288         if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
289                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
290                                 test_bit(TXDONE_UNKNOWN, &txdesc->flags))
291                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
292                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
293                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
294         }
295
296         /*
297          * Only send the status report to mac80211 when TX status was
298          * requested by it. If this was a extra frame coming through
299          * a mac80211 library call (RTS/CTS) then we should not send the
300          * status report back.
301          */
302         if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
303                 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
304         else
305                 dev_kfree_skb_irq(entry->skb);
306
307         /*
308          * Make this entry available for reuse.
309          */
310         entry->skb = NULL;
311         entry->flags = 0;
312
313         rt2x00dev->ops->lib->clear_entry(entry);
314
315         clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
316         rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
317
318         /*
319          * If the data queue was below the threshold before the txdone
320          * handler we must make sure the packet queue in the mac80211 stack
321          * is reenabled when the txdone handler has finished.
322          */
323         if (!rt2x00queue_threshold(entry->queue))
324                 ieee80211_wake_queue(rt2x00dev->hw, qid);
325 }
326 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
327
328 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,
329                                         struct rxdone_entry_desc *rxdesc)
330 {
331         struct ieee80211_supported_band *sband;
332         const struct rt2x00_rate *rate;
333         unsigned int i;
334         int signal;
335         int type;
336
337         /*
338          * For non-HT rates the MCS value needs to contain the
339          * actually used rate modulation (CCK or OFDM).
340          */
341         if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
342                 signal = RATE_MCS(rxdesc->rate_mode, rxdesc->signal);
343         else
344                 signal = rxdesc->signal;
345
346         type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
347
348         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
349         for (i = 0; i < sband->n_bitrates; i++) {
350                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
351
352                 if (((type == RXDONE_SIGNAL_PLCP) &&
353                      (rate->plcp == signal)) ||
354                     ((type == RXDONE_SIGNAL_BITRATE) &&
355                       (rate->bitrate == signal)) ||
356                     ((type == RXDONE_SIGNAL_MCS) &&
357                       (rate->mcs == signal))) {
358                         return i;
359                 }
360         }
361
362         WARNING(rt2x00dev, "Frame received with unrecognized signal, "
363                 "signal=0x%.4x, type=%d.\n", signal, type);
364         return 0;
365 }
366
367 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
368                       struct queue_entry *entry)
369 {
370         struct rxdone_entry_desc rxdesc;
371         struct sk_buff *skb;
372         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
373         unsigned int header_length;
374         bool l2pad;
375         int rate_idx;
376         /*
377          * Allocate a new sk_buffer. If no new buffer available, drop the
378          * received frame and reuse the existing buffer.
379          */
380         skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
381         if (!skb)
382                 return;
383
384         /*
385          * Unmap the skb.
386          */
387         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
388
389         /*
390          * Extract the RXD details.
391          */
392         memset(&rxdesc, 0, sizeof(rxdesc));
393         rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
394
395         /* Trim buffer to correct size */
396         skb_trim(entry->skb, rxdesc.size);
397
398         /*
399          * The data behind the ieee80211 header must be
400          * aligned on a 4 byte boundary.
401          */
402         header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
403         l2pad = !!(rxdesc.dev_flags & RXDONE_L2PAD);
404
405         /*
406          * Hardware might have stripped the IV/EIV/ICV data,
407          * in that case it is possible that the data was
408          * provided seperately (through hardware descriptor)
409          * in which case we should reinsert the data into the frame.
410          */
411         if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
412             (rxdesc.flags & RX_FLAG_IV_STRIPPED))
413                 rt2x00crypto_rx_insert_iv(entry->skb, l2pad, header_length,
414                                           &rxdesc);
415         else
416                 rt2x00queue_payload_align(entry->skb, l2pad, header_length);
417
418         /*
419          * Check if the frame was received using HT. In that case,
420          * the rate is the MCS index and should be passed to mac80211
421          * directly. Otherwise we need to translate the signal to
422          * the correct bitrate index.
423          */
424         if (rxdesc.rate_mode == RATE_MODE_CCK ||
425             rxdesc.rate_mode == RATE_MODE_OFDM) {
426                 rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
427         } else {
428                 rxdesc.flags |= RX_FLAG_HT;
429                 rate_idx = rxdesc.signal;
430         }
431
432         /*
433          * Update extra components
434          */
435         rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
436         rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
437
438         rx_status->mactime = rxdesc.timestamp;
439         rx_status->rate_idx = rate_idx;
440         rx_status->qual = rt2x00link_calculate_signal(rt2x00dev, rxdesc.rssi);
441         rx_status->signal = rxdesc.rssi;
442         rx_status->noise = rxdesc.noise;
443         rx_status->flag = rxdesc.flags;
444         rx_status->antenna = rt2x00dev->link.ant.active.rx;
445
446         /*
447          * Send frame to mac80211 & debugfs.
448          * mac80211 will clean up the skb structure.
449          */
450         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
451         memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
452         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
453
454         /*
455          * Replace the skb with the freshly allocated one.
456          */
457         entry->skb = skb;
458         entry->flags = 0;
459
460         rt2x00dev->ops->lib->clear_entry(entry);
461
462         rt2x00queue_index_inc(entry->queue, Q_INDEX);
463 }
464 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
465
466 /*
467  * Driver initialization handlers.
468  */
469 const struct rt2x00_rate rt2x00_supported_rates[12] = {
470         {
471                 .flags = DEV_RATE_CCK,
472                 .bitrate = 10,
473                 .ratemask = BIT(0),
474                 .plcp = 0x00,
475                 .mcs = RATE_MCS(RATE_MODE_CCK, 0),
476         },
477         {
478                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
479                 .bitrate = 20,
480                 .ratemask = BIT(1),
481                 .plcp = 0x01,
482                 .mcs = RATE_MCS(RATE_MODE_CCK, 1),
483         },
484         {
485                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
486                 .bitrate = 55,
487                 .ratemask = BIT(2),
488                 .plcp = 0x02,
489                 .mcs = RATE_MCS(RATE_MODE_CCK, 2),
490         },
491         {
492                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
493                 .bitrate = 110,
494                 .ratemask = BIT(3),
495                 .plcp = 0x03,
496                 .mcs = RATE_MCS(RATE_MODE_CCK, 3),
497         },
498         {
499                 .flags = DEV_RATE_OFDM,
500                 .bitrate = 60,
501                 .ratemask = BIT(4),
502                 .plcp = 0x0b,
503                 .mcs = RATE_MCS(RATE_MODE_OFDM, 0),
504         },
505         {
506                 .flags = DEV_RATE_OFDM,
507                 .bitrate = 90,
508                 .ratemask = BIT(5),
509                 .plcp = 0x0f,
510                 .mcs = RATE_MCS(RATE_MODE_OFDM, 1),
511         },
512         {
513                 .flags = DEV_RATE_OFDM,
514                 .bitrate = 120,
515                 .ratemask = BIT(6),
516                 .plcp = 0x0a,
517                 .mcs = RATE_MCS(RATE_MODE_OFDM, 2),
518         },
519         {
520                 .flags = DEV_RATE_OFDM,
521                 .bitrate = 180,
522                 .ratemask = BIT(7),
523                 .plcp = 0x0e,
524                 .mcs = RATE_MCS(RATE_MODE_OFDM, 3),
525         },
526         {
527                 .flags = DEV_RATE_OFDM,
528                 .bitrate = 240,
529                 .ratemask = BIT(8),
530                 .plcp = 0x09,
531                 .mcs = RATE_MCS(RATE_MODE_OFDM, 4),
532         },
533         {
534                 .flags = DEV_RATE_OFDM,
535                 .bitrate = 360,
536                 .ratemask = BIT(9),
537                 .plcp = 0x0d,
538                 .mcs = RATE_MCS(RATE_MODE_OFDM, 5),
539         },
540         {
541                 .flags = DEV_RATE_OFDM,
542                 .bitrate = 480,
543                 .ratemask = BIT(10),
544                 .plcp = 0x08,
545                 .mcs = RATE_MCS(RATE_MODE_OFDM, 6),
546         },
547         {
548                 .flags = DEV_RATE_OFDM,
549                 .bitrate = 540,
550                 .ratemask = BIT(11),
551                 .plcp = 0x0c,
552                 .mcs = RATE_MCS(RATE_MODE_OFDM, 7),
553         },
554 };
555
556 static void rt2x00lib_channel(struct ieee80211_channel *entry,
557                               const int channel, const int tx_power,
558                               const int value)
559 {
560         entry->center_freq = ieee80211_channel_to_frequency(channel);
561         entry->hw_value = value;
562         entry->max_power = tx_power;
563         entry->max_antenna_gain = 0xff;
564 }
565
566 static void rt2x00lib_rate(struct ieee80211_rate *entry,
567                            const u16 index, const struct rt2x00_rate *rate)
568 {
569         entry->flags = 0;
570         entry->bitrate = rate->bitrate;
571         entry->hw_value =index;
572         entry->hw_value_short = index;
573
574         if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
575                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
576 }
577
578 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
579                                     struct hw_mode_spec *spec)
580 {
581         struct ieee80211_hw *hw = rt2x00dev->hw;
582         struct ieee80211_channel *channels;
583         struct ieee80211_rate *rates;
584         unsigned int num_rates;
585         unsigned int i;
586
587         num_rates = 0;
588         if (spec->supported_rates & SUPPORT_RATE_CCK)
589                 num_rates += 4;
590         if (spec->supported_rates & SUPPORT_RATE_OFDM)
591                 num_rates += 8;
592
593         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
594         if (!channels)
595                 return -ENOMEM;
596
597         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
598         if (!rates)
599                 goto exit_free_channels;
600
601         /*
602          * Initialize Rate list.
603          */
604         for (i = 0; i < num_rates; i++)
605                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
606
607         /*
608          * Initialize Channel list.
609          */
610         for (i = 0; i < spec->num_channels; i++) {
611                 rt2x00lib_channel(&channels[i],
612                                   spec->channels[i].channel,
613                                   spec->channels_info[i].tx_power1, i);
614         }
615
616         /*
617          * Intitialize 802.11b, 802.11g
618          * Rates: CCK, OFDM.
619          * Channels: 2.4 GHz
620          */
621         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
622                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
623                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
624                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
625                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
626                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
627                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
628                 memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap,
629                        &spec->ht, sizeof(spec->ht));
630         }
631
632         /*
633          * Intitialize 802.11a
634          * Rates: OFDM.
635          * Channels: OFDM, UNII, HiperLAN2.
636          */
637         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
638                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
639                     spec->num_channels - 14;
640                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
641                     num_rates - 4;
642                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
643                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
644                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
645                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
646                 memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap,
647                        &spec->ht, sizeof(spec->ht));
648         }
649
650         return 0;
651
652  exit_free_channels:
653         kfree(channels);
654         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
655         return -ENOMEM;
656 }
657
658 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
659 {
660         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
661                 ieee80211_unregister_hw(rt2x00dev->hw);
662
663         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
664                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
665                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
666                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
667                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
668         }
669
670         kfree(rt2x00dev->spec.channels_info);
671 }
672
673 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
674 {
675         struct hw_mode_spec *spec = &rt2x00dev->spec;
676         int status;
677
678         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
679                 return 0;
680
681         /*
682          * Initialize HW modes.
683          */
684         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
685         if (status)
686                 return status;
687
688         /*
689          * Initialize HW fields.
690          */
691         rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
692
693         /*
694          * Register HW.
695          */
696         status = ieee80211_register_hw(rt2x00dev->hw);
697         if (status)
698                 return status;
699
700         set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
701
702         return 0;
703 }
704
705 /*
706  * Initialization/uninitialization handlers.
707  */
708 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
709 {
710         if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
711                 return;
712
713         /*
714          * Unregister extra components.
715          */
716         rt2x00rfkill_unregister(rt2x00dev);
717
718         /*
719          * Allow the HW to uninitialize.
720          */
721         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
722
723         /*
724          * Free allocated queue entries.
725          */
726         rt2x00queue_uninitialize(rt2x00dev);
727 }
728
729 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
730 {
731         int status;
732
733         if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
734                 return 0;
735
736         /*
737          * Allocate all queue entries.
738          */
739         status = rt2x00queue_initialize(rt2x00dev);
740         if (status)
741                 return status;
742
743         /*
744          * Initialize the device.
745          */
746         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
747         if (status) {
748                 rt2x00queue_uninitialize(rt2x00dev);
749                 return status;
750         }
751
752         set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
753
754         /*
755          * Register the extra components.
756          */
757         rt2x00rfkill_register(rt2x00dev);
758
759         return 0;
760 }
761
762 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
763 {
764         int retval;
765
766         if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
767                 return 0;
768
769         /*
770          * If this is the first interface which is added,
771          * we should load the firmware now.
772          */
773         retval = rt2x00lib_load_firmware(rt2x00dev);
774         if (retval)
775                 return retval;
776
777         /*
778          * Initialize the device.
779          */
780         retval = rt2x00lib_initialize(rt2x00dev);
781         if (retval)
782                 return retval;
783
784         rt2x00dev->intf_ap_count = 0;
785         rt2x00dev->intf_sta_count = 0;
786         rt2x00dev->intf_associated = 0;
787
788         set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
789
790         return 0;
791 }
792
793 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
794 {
795         if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
796                 return;
797
798         /*
799          * Perhaps we can add something smarter here,
800          * but for now just disabling the radio should do.
801          */
802         rt2x00lib_disable_radio(rt2x00dev);
803
804         rt2x00dev->intf_ap_count = 0;
805         rt2x00dev->intf_sta_count = 0;
806         rt2x00dev->intf_associated = 0;
807 }
808
809 /*
810  * driver allocation handlers.
811  */
812 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
813 {
814         int retval = -ENOMEM;
815
816         mutex_init(&rt2x00dev->csr_mutex);
817
818         /*
819          * Make room for rt2x00_intf inside the per-interface
820          * structure ieee80211_vif.
821          */
822         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
823
824         /*
825          * Determine which operating modes are supported, all modes
826          * which require beaconing, depend on the availability of
827          * beacon entries.
828          */
829         rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
830         if (rt2x00dev->ops->bcn->entry_num > 0)
831                 rt2x00dev->hw->wiphy->interface_modes |=
832                     BIT(NL80211_IFTYPE_ADHOC) |
833                     BIT(NL80211_IFTYPE_AP) |
834                     BIT(NL80211_IFTYPE_MESH_POINT) |
835                     BIT(NL80211_IFTYPE_WDS);
836
837         /*
838          * Let the driver probe the device to detect the capabilities.
839          */
840         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
841         if (retval) {
842                 ERROR(rt2x00dev, "Failed to allocate device.\n");
843                 goto exit;
844         }
845
846         /*
847          * Initialize configuration work.
848          */
849         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
850         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
851
852         /*
853          * Allocate queue array.
854          */
855         retval = rt2x00queue_allocate(rt2x00dev);
856         if (retval)
857                 goto exit;
858
859         /*
860          * Initialize ieee80211 structure.
861          */
862         retval = rt2x00lib_probe_hw(rt2x00dev);
863         if (retval) {
864                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
865                 goto exit;
866         }
867
868         /*
869          * Register extra components.
870          */
871         rt2x00link_register(rt2x00dev);
872         rt2x00leds_register(rt2x00dev);
873         rt2x00debug_register(rt2x00dev);
874
875         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
876
877         return 0;
878
879 exit:
880         rt2x00lib_remove_dev(rt2x00dev);
881
882         return retval;
883 }
884 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
885
886 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
887 {
888         clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
889
890         /*
891          * Disable radio.
892          */
893         rt2x00lib_disable_radio(rt2x00dev);
894
895         /*
896          * Stop all work.
897          */
898         cancel_work_sync(&rt2x00dev->filter_work);
899         cancel_work_sync(&rt2x00dev->intf_work);
900
901         /*
902          * Uninitialize device.
903          */
904         rt2x00lib_uninitialize(rt2x00dev);
905
906         /*
907          * Free extra components
908          */
909         rt2x00debug_deregister(rt2x00dev);
910         rt2x00leds_unregister(rt2x00dev);
911
912         /*
913          * Free ieee80211_hw memory.
914          */
915         rt2x00lib_remove_hw(rt2x00dev);
916
917         /*
918          * Free firmware image.
919          */
920         rt2x00lib_free_firmware(rt2x00dev);
921
922         /*
923          * Free queue structures.
924          */
925         rt2x00queue_free(rt2x00dev);
926 }
927 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
928
929 /*
930  * Device state handlers
931  */
932 #ifdef CONFIG_PM
933 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
934 {
935         NOTICE(rt2x00dev, "Going to sleep.\n");
936
937         /*
938          * Prevent mac80211 from accessing driver while suspended.
939          */
940         if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
941                 return 0;
942
943         /*
944          * Cleanup as much as possible.
945          */
946         rt2x00lib_uninitialize(rt2x00dev);
947
948         /*
949          * Suspend/disable extra components.
950          */
951         rt2x00leds_suspend(rt2x00dev);
952         rt2x00debug_deregister(rt2x00dev);
953
954         /*
955          * Set device mode to sleep for power management,
956          * on some hardware this call seems to consistently fail.
957          * From the specifications it is hard to tell why it fails,
958          * and if this is a "bad thing".
959          * Overall it is safe to just ignore the failure and
960          * continue suspending. The only downside is that the
961          * device will not be in optimal power save mode, but with
962          * the radio and the other components already disabled the
963          * device is as good as disabled.
964          */
965         if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP))
966                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
967                         "continue suspending.\n");
968
969         return 0;
970 }
971 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
972
973 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
974 {
975         NOTICE(rt2x00dev, "Waking up.\n");
976
977         /*
978          * Restore/enable extra components.
979          */
980         rt2x00debug_register(rt2x00dev);
981         rt2x00leds_resume(rt2x00dev);
982
983         /*
984          * We are ready again to receive requests from mac80211.
985          */
986         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
987
988         return 0;
989 }
990 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
991 #endif /* CONFIG_PM */
992
993 /*
994  * rt2x00lib module information.
995  */
996 MODULE_AUTHOR(DRV_PROJECT);
997 MODULE_VERSION(DRV_VERSION);
998 MODULE_DESCRIPTION("rt2x00 library");
999 MODULE_LICENSE("GPL");