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95ea3627 | 1 | /* |
811aa9ca | 2 | Copyright (C) 2004 - 2008 rt2x00 SourceForge Project |
95ea3627 ID |
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 | ||
95ea3627 ID |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | ||
29 | #include "rt2x00.h" | |
30 | #include "rt2x00lib.h" | |
4d8dd66c | 31 | #include "rt2x00dump.h" |
95ea3627 | 32 | |
95ea3627 ID |
33 | /* |
34 | * Link tuning handlers | |
35 | */ | |
53b3f8e4 | 36 | void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev) |
95ea3627 | 37 | { |
53b3f8e4 ID |
38 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) |
39 | return; | |
40 | ||
41 | /* | |
42 | * Reset link information. | |
43 | * Both the currently active vgc level as well as | |
44 | * the link tuner counter should be reset. Resetting | |
45 | * the counter is important for devices where the | |
46 | * device should only perform link tuning during the | |
47 | * first minute after being enabled. | |
48 | */ | |
8de8c516 ID |
49 | rt2x00dev->link.count = 0; |
50 | rt2x00dev->link.vgc_level = 0; | |
51 | ||
53b3f8e4 ID |
52 | /* |
53 | * Reset the link tuner. | |
54 | */ | |
55 | rt2x00dev->ops->lib->reset_tuner(rt2x00dev); | |
56 | } | |
57 | ||
58 | static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev) | |
59 | { | |
60 | /* | |
61 | * Clear all (possibly) pre-existing quality statistics. | |
62 | */ | |
8de8c516 ID |
63 | memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual)); |
64 | ||
65 | /* | |
66 | * The RX and TX percentage should start at 50% | |
67 | * this will assure we will get at least get some | |
68 | * decent value when the link tuner starts. | |
69 | * The value will be dropped and overwritten with | |
70 | * the correct (measured )value anyway during the | |
71 | * first run of the link tuner. | |
72 | */ | |
73 | rt2x00dev->link.qual.rx_percentage = 50; | |
74 | rt2x00dev->link.qual.tx_percentage = 50; | |
95ea3627 | 75 | |
53b3f8e4 | 76 | rt2x00lib_reset_link_tuner(rt2x00dev); |
95ea3627 ID |
77 | |
78 | queue_delayed_work(rt2x00dev->hw->workqueue, | |
79 | &rt2x00dev->link.work, LINK_TUNE_INTERVAL); | |
80 | } | |
81 | ||
82 | static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev) | |
83 | { | |
3e30968e | 84 | cancel_delayed_work_sync(&rt2x00dev->link.work); |
95ea3627 ID |
85 | } |
86 | ||
95ea3627 ID |
87 | /* |
88 | * Radio control handlers. | |
89 | */ | |
90 | int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) | |
91 | { | |
92 | int status; | |
93 | ||
94 | /* | |
95 | * Don't enable the radio twice. | |
96 | * And check if the hardware button has been disabled. | |
97 | */ | |
98 | if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || | |
81873e9c | 99 | test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags)) |
95ea3627 ID |
100 | return 0; |
101 | ||
837e7f24 | 102 | /* |
181d6902 | 103 | * Initialize all data queues. |
837e7f24 | 104 | */ |
181d6902 ID |
105 | rt2x00queue_init_rx(rt2x00dev); |
106 | rt2x00queue_init_tx(rt2x00dev); | |
837e7f24 | 107 | |
95ea3627 ID |
108 | /* |
109 | * Enable radio. | |
110 | */ | |
111 | status = rt2x00dev->ops->lib->set_device_state(rt2x00dev, | |
112 | STATE_RADIO_ON); | |
113 | if (status) | |
114 | return status; | |
115 | ||
116 | __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags); | |
117 | ||
118 | /* | |
119 | * Enable RX. | |
120 | */ | |
5cbf830e | 121 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 ID |
122 | |
123 | /* | |
124 | * Start the TX queues. | |
125 | */ | |
126 | ieee80211_start_queues(rt2x00dev->hw); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
132 | { | |
133 | if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
134 | return; | |
135 | ||
136 | /* | |
4150c572 | 137 | * Stop all scheduled work. |
95ea3627 | 138 | */ |
6bb40dd1 ID |
139 | if (work_pending(&rt2x00dev->intf_work)) |
140 | cancel_work_sync(&rt2x00dev->intf_work); | |
4150c572 JB |
141 | if (work_pending(&rt2x00dev->filter_work)) |
142 | cancel_work_sync(&rt2x00dev->filter_work); | |
95ea3627 ID |
143 | |
144 | /* | |
145 | * Stop the TX queues. | |
146 | */ | |
147 | ieee80211_stop_queues(rt2x00dev->hw); | |
148 | ||
149 | /* | |
150 | * Disable RX. | |
151 | */ | |
5cbf830e | 152 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
153 | |
154 | /* | |
155 | * Disable radio. | |
156 | */ | |
157 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
158 | } | |
159 | ||
5cbf830e | 160 | void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) |
95ea3627 | 161 | { |
95ea3627 ID |
162 | /* |
163 | * When we are disabling the RX, we should also stop the link tuner. | |
164 | */ | |
5cbf830e | 165 | if (state == STATE_RADIO_RX_OFF) |
95ea3627 ID |
166 | rt2x00lib_stop_link_tuner(rt2x00dev); |
167 | ||
168 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); | |
169 | ||
170 | /* | |
171 | * When we are enabling the RX, we should also start the link tuner. | |
172 | */ | |
5cbf830e | 173 | if (state == STATE_RADIO_RX_ON && |
6bb40dd1 | 174 | (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count)) |
95ea3627 ID |
175 | rt2x00lib_start_link_tuner(rt2x00dev); |
176 | } | |
177 | ||
69f81a2c ID |
178 | static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev) |
179 | { | |
180 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
181 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
182 | int sample_a = | |
183 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A); | |
184 | int sample_b = | |
185 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B); | |
186 | ||
187 | /* | |
188 | * We are done sampling. Now we should evaluate the results. | |
189 | */ | |
190 | rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE; | |
191 | ||
192 | /* | |
193 | * During the last period we have sampled the RSSI | |
194 | * from both antenna's. It now is time to determine | |
195 | * which antenna demonstrated the best performance. | |
196 | * When we are already on the antenna with the best | |
197 | * performance, then there really is nothing for us | |
198 | * left to do. | |
199 | */ | |
200 | if (sample_a == sample_b) | |
201 | return; | |
202 | ||
05253c93 ID |
203 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) |
204 | rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c | 205 | |
05253c93 ID |
206 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) |
207 | tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c ID |
208 | |
209 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
210 | } | |
211 | ||
212 | static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev) | |
213 | { | |
214 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
215 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
216 | int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link); | |
217 | int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr); | |
218 | ||
219 | /* | |
220 | * Legacy driver indicates that we should swap antenna's | |
221 | * when the difference in RSSI is greater that 5. This | |
222 | * also should be done when the RSSI was actually better | |
223 | * then the previous sample. | |
224 | * When the difference exceeds the threshold we should | |
225 | * sample the rssi from the other antenna to make a valid | |
226 | * comparison between the 2 antennas. | |
227 | */ | |
b290d433 | 228 | if (abs(rssi_curr - rssi_old) < 5) |
69f81a2c ID |
229 | return; |
230 | ||
231 | rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE; | |
232 | ||
233 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) | |
234 | rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
235 | ||
236 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) | |
237 | tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
238 | ||
239 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
240 | } | |
241 | ||
242 | static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev) | |
243 | { | |
244 | /* | |
245 | * Determine if software diversity is enabled for | |
246 | * either the TX or RX antenna (or both). | |
247 | * Always perform this check since within the link | |
248 | * tuner interval the configuration might have changed. | |
249 | */ | |
250 | rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY; | |
251 | rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY; | |
252 | ||
253 | if (rt2x00dev->hw->conf.antenna_sel_rx == 0 && | |
b290d433 | 254 | rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
255 | rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY; |
256 | if (rt2x00dev->hw->conf.antenna_sel_tx == 0 && | |
b290d433 | 257 | rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
258 | rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY; |
259 | ||
260 | if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) && | |
261 | !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) { | |
05253c93 | 262 | rt2x00dev->link.ant.flags = 0; |
69f81a2c ID |
263 | return; |
264 | } | |
265 | ||
266 | /* | |
267 | * If we have only sampled the data over the last period | |
268 | * we should now harvest the data. Otherwise just evaluate | |
269 | * the data. The latter should only be performed once | |
270 | * every 2 seconds. | |
271 | */ | |
272 | if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE) | |
273 | rt2x00lib_evaluate_antenna_sample(rt2x00dev); | |
274 | else if (rt2x00dev->link.count & 1) | |
275 | rt2x00lib_evaluate_antenna_eval(rt2x00dev); | |
276 | } | |
277 | ||
278 | static void rt2x00lib_update_link_stats(struct link *link, int rssi) | |
279 | { | |
280 | int avg_rssi = rssi; | |
281 | ||
282 | /* | |
283 | * Update global RSSI | |
284 | */ | |
285 | if (link->qual.avg_rssi) | |
286 | avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8); | |
287 | link->qual.avg_rssi = avg_rssi; | |
288 | ||
289 | /* | |
290 | * Update antenna RSSI | |
291 | */ | |
292 | if (link->ant.rssi_ant) | |
293 | rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8); | |
294 | link->ant.rssi_ant = rssi; | |
295 | } | |
296 | ||
ebcf26da | 297 | static void rt2x00lib_precalculate_link_signal(struct link_qual *qual) |
95ea3627 | 298 | { |
ebcf26da ID |
299 | if (qual->rx_failed || qual->rx_success) |
300 | qual->rx_percentage = | |
301 | (qual->rx_success * 100) / | |
302 | (qual->rx_failed + qual->rx_success); | |
95ea3627 | 303 | else |
ebcf26da | 304 | qual->rx_percentage = 50; |
95ea3627 | 305 | |
ebcf26da ID |
306 | if (qual->tx_failed || qual->tx_success) |
307 | qual->tx_percentage = | |
308 | (qual->tx_success * 100) / | |
309 | (qual->tx_failed + qual->tx_success); | |
95ea3627 | 310 | else |
ebcf26da | 311 | qual->tx_percentage = 50; |
95ea3627 | 312 | |
ebcf26da ID |
313 | qual->rx_success = 0; |
314 | qual->rx_failed = 0; | |
315 | qual->tx_success = 0; | |
316 | qual->tx_failed = 0; | |
95ea3627 ID |
317 | } |
318 | ||
319 | static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, | |
320 | int rssi) | |
321 | { | |
322 | int rssi_percentage = 0; | |
323 | int signal; | |
324 | ||
325 | /* | |
326 | * We need a positive value for the RSSI. | |
327 | */ | |
328 | if (rssi < 0) | |
329 | rssi += rt2x00dev->rssi_offset; | |
330 | ||
331 | /* | |
332 | * Calculate the different percentages, | |
333 | * which will be used for the signal. | |
334 | */ | |
335 | if (rt2x00dev->rssi_offset) | |
336 | rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; | |
337 | ||
338 | /* | |
339 | * Add the individual percentages and use the WEIGHT | |
340 | * defines to calculate the current link signal. | |
341 | */ | |
342 | signal = ((WEIGHT_RSSI * rssi_percentage) + | |
ebcf26da ID |
343 | (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) + |
344 | (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100; | |
95ea3627 ID |
345 | |
346 | return (signal > 100) ? 100 : signal; | |
347 | } | |
348 | ||
349 | static void rt2x00lib_link_tuner(struct work_struct *work) | |
350 | { | |
351 | struct rt2x00_dev *rt2x00dev = | |
352 | container_of(work, struct rt2x00_dev, link.work.work); | |
353 | ||
25ab002f ID |
354 | /* |
355 | * When the radio is shutting down we should | |
356 | * immediately cease all link tuning. | |
357 | */ | |
358 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
359 | return; | |
360 | ||
95ea3627 ID |
361 | /* |
362 | * Update statistics. | |
363 | */ | |
ebcf26da | 364 | rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual); |
95ea3627 | 365 | rt2x00dev->low_level_stats.dot11FCSErrorCount += |
ebcf26da | 366 | rt2x00dev->link.qual.rx_failed; |
95ea3627 | 367 | |
95ea3627 ID |
368 | /* |
369 | * Only perform the link tuning when Link tuning | |
370 | * has been enabled (This could have been disabled from the EEPROM). | |
371 | */ | |
372 | if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) | |
373 | rt2x00dev->ops->lib->link_tuner(rt2x00dev); | |
374 | ||
725d99d4 ID |
375 | /* |
376 | * Precalculate a portion of the link signal which is | |
377 | * in based on the tx/rx success/failure counters. | |
378 | */ | |
ebcf26da | 379 | rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual); |
725d99d4 | 380 | |
53b3f8e4 ID |
381 | /* |
382 | * Evaluate antenna setup, make this the last step since this could | |
383 | * possibly reset some statistics. | |
384 | */ | |
385 | rt2x00lib_evaluate_antenna(rt2x00dev); | |
386 | ||
95ea3627 ID |
387 | /* |
388 | * Increase tuner counter, and reschedule the next link tuner run. | |
389 | */ | |
390 | rt2x00dev->link.count++; | |
391 | queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, | |
392 | LINK_TUNE_INTERVAL); | |
393 | } | |
394 | ||
4150c572 JB |
395 | static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) |
396 | { | |
397 | struct rt2x00_dev *rt2x00dev = | |
398 | container_of(work, struct rt2x00_dev, filter_work); | |
3c4f2085 | 399 | unsigned int filter = rt2x00dev->packet_filter; |
5886d0db ID |
400 | |
401 | /* | |
6bb40dd1 | 402 | * Since we had stored the filter inside rt2x00dev->packet_filter, |
5886d0db ID |
403 | * we should now clear that field. Otherwise the driver will |
404 | * assume nothing has changed (*total_flags will be compared | |
6bb40dd1 | 405 | * to rt2x00dev->packet_filter to determine if any action is required). |
5886d0db | 406 | */ |
3c4f2085 | 407 | rt2x00dev->packet_filter = 0; |
4150c572 JB |
408 | |
409 | rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw, | |
5886d0db | 410 | filter, &filter, 0, NULL); |
4150c572 JB |
411 | } |
412 | ||
6bb40dd1 ID |
413 | static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, |
414 | struct ieee80211_vif *vif) | |
5c58ee51 | 415 | { |
6bb40dd1 ID |
416 | struct rt2x00_dev *rt2x00dev = data; |
417 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
418 | struct sk_buff *skb; | |
419 | struct ieee80211_tx_control control; | |
420 | struct ieee80211_bss_conf conf; | |
421 | int delayed_flags; | |
422 | ||
423 | /* | |
424 | * Copy all data we need during this action under the protection | |
425 | * of a spinlock. Otherwise race conditions might occur which results | |
426 | * into an invalid configuration. | |
427 | */ | |
428 | spin_lock(&intf->lock); | |
429 | ||
430 | memcpy(&conf, &intf->conf, sizeof(conf)); | |
431 | delayed_flags = intf->delayed_flags; | |
432 | intf->delayed_flags = 0; | |
433 | ||
434 | spin_unlock(&intf->lock); | |
435 | ||
436 | if (delayed_flags & DELAYED_UPDATE_BEACON) { | |
437 | skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control); | |
438 | if (skb) { | |
439 | rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb, | |
440 | &control); | |
441 | dev_kfree_skb(skb); | |
442 | } | |
443 | } | |
444 | ||
445 | if (delayed_flags & DELAYED_CONFIG_PREAMBLE) | |
446 | rt2x00lib_config_preamble(rt2x00dev, intf, | |
447 | intf->conf.use_short_preamble); | |
448 | } | |
5c58ee51 | 449 | |
6bb40dd1 ID |
450 | static void rt2x00lib_intf_scheduled(struct work_struct *work) |
451 | { | |
452 | struct rt2x00_dev *rt2x00dev = | |
453 | container_of(work, struct rt2x00_dev, intf_work); | |
471b3efd JB |
454 | |
455 | /* | |
6bb40dd1 ID |
456 | * Iterate over each interface and perform the |
457 | * requested configurations. | |
471b3efd | 458 | */ |
6bb40dd1 ID |
459 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
460 | rt2x00lib_intf_scheduled_iter, | |
461 | rt2x00dev); | |
5c58ee51 ID |
462 | } |
463 | ||
95ea3627 ID |
464 | /* |
465 | * Interrupt context handlers. | |
466 | */ | |
6bb40dd1 ID |
467 | static void rt2x00lib_beacondone_iter(void *data, u8 *mac, |
468 | struct ieee80211_vif *vif) | |
95ea3627 | 469 | { |
6bb40dd1 | 470 | struct rt2x00_intf *intf = vif_to_intf(vif); |
95ea3627 | 471 | |
6bb40dd1 ID |
472 | if (vif->type != IEEE80211_IF_TYPE_AP && |
473 | vif->type != IEEE80211_IF_TYPE_IBSS) | |
95ea3627 ID |
474 | return; |
475 | ||
6bb40dd1 ID |
476 | spin_lock(&intf->lock); |
477 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
478 | spin_unlock(&intf->lock); | |
95ea3627 ID |
479 | } |
480 | ||
481 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
482 | { | |
483 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
484 | return; | |
485 | ||
6bb40dd1 ID |
486 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
487 | rt2x00lib_beacondone_iter, | |
488 | rt2x00dev); | |
489 | ||
490 | queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work); | |
95ea3627 ID |
491 | } |
492 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
493 | ||
181d6902 ID |
494 | void rt2x00lib_txdone(struct queue_entry *entry, |
495 | struct txdone_entry_desc *txdesc) | |
95ea3627 | 496 | { |
181d6902 ID |
497 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
498 | struct ieee80211_tx_status tx_status; | |
499 | int success = !!(txdesc->status == TX_SUCCESS || | |
500 | txdesc->status == TX_SUCCESS_RETRY); | |
501 | int fail = !!(txdesc->status == TX_FAIL_RETRY || | |
502 | txdesc->status == TX_FAIL_INVALID || | |
503 | txdesc->status == TX_FAIL_OTHER); | |
95ea3627 ID |
504 | |
505 | /* | |
506 | * Update TX statistics. | |
507 | */ | |
ebcf26da | 508 | rt2x00dev->link.qual.tx_success += success; |
181d6902 | 509 | rt2x00dev->link.qual.tx_failed += txdesc->retry + fail; |
95ea3627 | 510 | |
181d6902 ID |
511 | /* |
512 | * Initialize TX status | |
513 | */ | |
514 | tx_status.flags = 0; | |
515 | tx_status.ack_signal = 0; | |
516 | tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY); | |
517 | tx_status.retry_count = txdesc->retry; | |
518 | memcpy(&tx_status.control, txdesc->control, sizeof(txdesc->control)); | |
519 | ||
520 | if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) { | |
95ea3627 | 521 | if (success) |
181d6902 | 522 | tx_status.flags |= IEEE80211_TX_STATUS_ACK; |
95ea3627 | 523 | else |
181d6902 | 524 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
525 | } |
526 | ||
181d6902 ID |
527 | tx_status.queue_length = entry->queue->limit; |
528 | tx_status.queue_number = tx_status.control.queue; | |
95ea3627 | 529 | |
181d6902 | 530 | if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { |
95ea3627 | 531 | if (success) |
181d6902 | 532 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
95ea3627 | 533 | else |
181d6902 | 534 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
535 | } |
536 | ||
537 | /* | |
4d8dd66c ID |
538 | * Send the tx_status to mac80211 & debugfs. |
539 | * mac80211 will clean up the skb structure. | |
95ea3627 | 540 | */ |
181d6902 | 541 | get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_TXDONE; |
4d8dd66c | 542 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); |
181d6902 | 543 | ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, &tx_status); |
95ea3627 ID |
544 | entry->skb = NULL; |
545 | } | |
546 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
547 | ||
181d6902 ID |
548 | void rt2x00lib_rxdone(struct queue_entry *entry, |
549 | struct rxdone_entry_desc *rxdesc) | |
95ea3627 | 550 | { |
181d6902 | 551 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
95ea3627 | 552 | struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; |
8318d78a | 553 | struct ieee80211_supported_band *sband; |
95ea3627 | 554 | struct ieee80211_rate *rate; |
61af43c5 | 555 | struct ieee80211_hdr *hdr; |
95ea3627 | 556 | unsigned int i; |
8318d78a | 557 | int val = 0, idx = -1; |
61af43c5 | 558 | u16 fc; |
95ea3627 ID |
559 | |
560 | /* | |
561 | * Update RX statistics. | |
562 | */ | |
8318d78a JB |
563 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; |
564 | for (i = 0; i < sband->n_bitrates; i++) { | |
565 | rate = &sband->bitrates[i]; | |
95ea3627 ID |
566 | |
567 | /* | |
568 | * When frame was received with an OFDM bitrate, | |
569 | * the signal is the PLCP value. If it was received with | |
570 | * a CCK bitrate the signal is the rate in 0.5kbit/s. | |
571 | */ | |
181d6902 | 572 | if (!rxdesc->ofdm) |
8318d78a | 573 | val = DEVICE_GET_RATE_FIELD(rate->hw_value, RATE); |
95ea3627 | 574 | else |
8318d78a | 575 | val = DEVICE_GET_RATE_FIELD(rate->hw_value, PLCP); |
95ea3627 | 576 | |
181d6902 | 577 | if (val == rxdesc->signal) { |
8318d78a | 578 | idx = i; |
95ea3627 ID |
579 | break; |
580 | } | |
581 | } | |
582 | ||
61af43c5 | 583 | /* |
7e56d38d | 584 | * Only update link status if this is a beacon frame carrying our bssid. |
61af43c5 | 585 | */ |
181d6902 | 586 | hdr = (struct ieee80211_hdr*)entry->skb->data; |
7e56d38d | 587 | fc = le16_to_cpu(hdr->frame_control); |
181d6902 ID |
588 | if (is_beacon(fc) && rxdesc->my_bss) |
589 | rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi); | |
61af43c5 | 590 | |
ebcf26da | 591 | rt2x00dev->link.qual.rx_success++; |
69f81a2c | 592 | |
8318d78a | 593 | rx_status->rate_idx = idx; |
4150c572 | 594 | rx_status->signal = |
181d6902 ID |
595 | rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi); |
596 | rx_status->ssi = rxdesc->rssi; | |
597 | rx_status->flag = rxdesc->flags; | |
69f81a2c | 598 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 ID |
599 | |
600 | /* | |
181d6902 ID |
601 | * Send frame to mac80211 & debugfs. |
602 | * mac80211 will clean up the skb structure. | |
95ea3627 | 603 | */ |
181d6902 ID |
604 | get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE; |
605 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); | |
606 | ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status); | |
607 | entry->skb = NULL; | |
95ea3627 ID |
608 | } |
609 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
610 | ||
611 | /* | |
612 | * TX descriptor initializer | |
613 | */ | |
614 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
08992f7f | 615 | struct sk_buff *skb, |
95ea3627 ID |
616 | struct ieee80211_tx_control *control) |
617 | { | |
181d6902 ID |
618 | struct txentry_desc txdesc; |
619 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); | |
620 | struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data; | |
95ea3627 ID |
621 | int tx_rate; |
622 | int bitrate; | |
08992f7f | 623 | int length; |
95ea3627 ID |
624 | int duration; |
625 | int residual; | |
626 | u16 frame_control; | |
627 | u16 seq_ctrl; | |
628 | ||
181d6902 | 629 | memset(&txdesc, 0, sizeof(txdesc)); |
95ea3627 | 630 | |
091ed315 | 631 | txdesc.queue = skbdesc->entry->queue->qid; |
181d6902 ID |
632 | txdesc.cw_min = skbdesc->entry->queue->cw_min; |
633 | txdesc.cw_max = skbdesc->entry->queue->cw_max; | |
634 | txdesc.aifs = skbdesc->entry->queue->aifs; | |
95ea3627 | 635 | |
95ea3627 ID |
636 | /* |
637 | * Read required fields from ieee80211 header. | |
638 | */ | |
639 | frame_control = le16_to_cpu(ieee80211hdr->frame_control); | |
640 | seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl); | |
641 | ||
8318d78a | 642 | tx_rate = control->tx_rate->hw_value; |
95ea3627 | 643 | |
2700f8b0 MN |
644 | /* |
645 | * Check whether this frame is to be acked | |
646 | */ | |
647 | if (!(control->flags & IEEE80211_TXCTL_NO_ACK)) | |
181d6902 | 648 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); |
2700f8b0 | 649 | |
95ea3627 ID |
650 | /* |
651 | * Check if this is a RTS/CTS frame | |
652 | */ | |
653 | if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { | |
181d6902 | 654 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
2700f8b0 | 655 | if (is_rts_frame(frame_control)) { |
181d6902 ID |
656 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags); |
657 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); | |
2700f8b0 | 658 | } else |
181d6902 | 659 | __clear_bit(ENTRY_TXD_ACK, &txdesc.flags); |
95ea3627 | 660 | if (control->rts_cts_rate) |
8318d78a | 661 | tx_rate = control->rts_cts_rate->hw_value; |
95ea3627 ID |
662 | } |
663 | ||
664 | /* | |
665 | * Check for OFDM | |
666 | */ | |
667 | if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK) | |
181d6902 | 668 | __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags); |
95ea3627 ID |
669 | |
670 | /* | |
671 | * Check if more fragments are pending | |
672 | */ | |
673 | if (ieee80211_get_morefrag(ieee80211hdr)) { | |
181d6902 ID |
674 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
675 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags); | |
95ea3627 ID |
676 | } |
677 | ||
678 | /* | |
679 | * Beacons and probe responses require the tsf timestamp | |
680 | * to be inserted into the frame. | |
681 | */ | |
5957da4c | 682 | if (control->queue == RT2X00_BCN_QUEUE_BEACON || |
95ea3627 | 683 | is_probe_resp(frame_control)) |
181d6902 | 684 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags); |
95ea3627 ID |
685 | |
686 | /* | |
687 | * Determine with what IFS priority this frame should be send. | |
688 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
689 | * or this fragment came after RTS/CTS. | |
690 | */ | |
691 | if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || | |
181d6902 ID |
692 | test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags)) |
693 | txdesc.ifs = IFS_SIFS; | |
95ea3627 | 694 | else |
181d6902 | 695 | txdesc.ifs = IFS_BACKOFF; |
95ea3627 ID |
696 | |
697 | /* | |
698 | * PLCP setup | |
699 | * Length calculation depends on OFDM/CCK rate. | |
700 | */ | |
181d6902 ID |
701 | txdesc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP); |
702 | txdesc.service = 0x04; | |
95ea3627 | 703 | |
181d6902 ID |
704 | length = skb->len + FCS_LEN; |
705 | if (test_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags)) { | |
706 | txdesc.length_high = (length >> 6) & 0x3f; | |
707 | txdesc.length_low = length & 0x3f; | |
95ea3627 ID |
708 | } else { |
709 | bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE); | |
710 | ||
711 | /* | |
712 | * Convert length to microseconds. | |
713 | */ | |
08992f7f ID |
714 | residual = get_duration_res(length, bitrate); |
715 | duration = get_duration(length, bitrate); | |
95ea3627 ID |
716 | |
717 | if (residual != 0) { | |
718 | duration++; | |
719 | ||
720 | /* | |
721 | * Check if we need to set the Length Extension | |
722 | */ | |
db151787 | 723 | if (bitrate == 110 && residual <= 30) |
181d6902 | 724 | txdesc.service |= 0x80; |
95ea3627 ID |
725 | } |
726 | ||
181d6902 ID |
727 | txdesc.length_high = (duration >> 8) & 0xff; |
728 | txdesc.length_low = duration & 0xff; | |
95ea3627 ID |
729 | |
730 | /* | |
731 | * When preamble is enabled we should set the | |
732 | * preamble bit for the signal. | |
733 | */ | |
734 | if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE)) | |
181d6902 | 735 | txdesc.signal |= 0x08; |
95ea3627 ID |
736 | } |
737 | ||
181d6902 | 738 | rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control); |
08992f7f ID |
739 | |
740 | /* | |
181d6902 | 741 | * Update queue entry. |
08992f7f ID |
742 | */ |
743 | skbdesc->entry->skb = skb; | |
4d8dd66c ID |
744 | |
745 | /* | |
746 | * The frame has been completely initialized and ready | |
747 | * for sending to the device. The caller will push the | |
748 | * frame to the device, but we are going to push the | |
749 | * frame to debugfs here. | |
750 | */ | |
751 | skbdesc->frame_type = DUMP_FRAME_TX; | |
752 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
753 | } |
754 | EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); | |
755 | ||
756 | /* | |
757 | * Driver initialization handlers. | |
758 | */ | |
759 | static void rt2x00lib_channel(struct ieee80211_channel *entry, | |
760 | const int channel, const int tx_power, | |
761 | const int value) | |
762 | { | |
95ea3627 | 763 | if (channel <= 14) |
8318d78a | 764 | entry->center_freq = 2407 + (5 * channel); |
95ea3627 | 765 | else |
8318d78a JB |
766 | entry->center_freq = 5000 + (5 * channel); |
767 | entry->hw_value = value; | |
768 | entry->max_power = tx_power; | |
769 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
770 | } |
771 | ||
772 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
773 | const int rate, const int mask, | |
774 | const int plcp, const int flags) | |
775 | { | |
8318d78a JB |
776 | entry->bitrate = rate; |
777 | entry->hw_value = | |
95ea3627 ID |
778 | DEVICE_SET_RATE_FIELD(rate, RATE) | |
779 | DEVICE_SET_RATE_FIELD(mask, RATEMASK) | | |
780 | DEVICE_SET_RATE_FIELD(plcp, PLCP); | |
781 | entry->flags = flags; | |
8318d78a JB |
782 | entry->hw_value_short = entry->hw_value; |
783 | if (entry->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
784 | entry->hw_value_short |= DEVICE_SET_RATE_FIELD(1, PREAMBLE); | |
95ea3627 ID |
785 | } |
786 | ||
787 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
788 | struct hw_mode_spec *spec) | |
789 | { | |
790 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
8318d78a | 791 | struct ieee80211_supported_band *sbands; |
95ea3627 ID |
792 | struct ieee80211_channel *channels; |
793 | struct ieee80211_rate *rates; | |
794 | unsigned int i; | |
795 | unsigned char tx_power; | |
796 | ||
8318d78a | 797 | sbands = &rt2x00dev->bands[0]; |
95ea3627 ID |
798 | |
799 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
800 | if (!channels) | |
8318d78a | 801 | return -ENOMEM; |
95ea3627 ID |
802 | |
803 | rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL); | |
804 | if (!rates) | |
805 | goto exit_free_channels; | |
806 | ||
807 | /* | |
808 | * Initialize Rate list. | |
809 | */ | |
810 | rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB, | |
8318d78a | 811 | 0x00, 0); |
95ea3627 | 812 | rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB, |
8318d78a | 813 | 0x01, IEEE80211_RATE_SHORT_PREAMBLE); |
95ea3627 | 814 | rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB, |
8318d78a | 815 | 0x02, IEEE80211_RATE_SHORT_PREAMBLE); |
95ea3627 | 816 | rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB, |
8318d78a | 817 | 0x03, IEEE80211_RATE_SHORT_PREAMBLE); |
95ea3627 ID |
818 | |
819 | if (spec->num_rates > 4) { | |
820 | rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB, | |
8318d78a | 821 | 0x0b, 0); |
95ea3627 | 822 | rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB, |
8318d78a | 823 | 0x0f, 0); |
95ea3627 | 824 | rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB, |
8318d78a | 825 | 0x0a, 0); |
95ea3627 | 826 | rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB, |
8318d78a | 827 | 0x0e, 0); |
95ea3627 | 828 | rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB, |
8318d78a | 829 | 0x09, 0); |
95ea3627 | 830 | rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB, |
8318d78a | 831 | 0x0d, 0); |
95ea3627 | 832 | rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB, |
8318d78a | 833 | 0x08, 0); |
95ea3627 | 834 | rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB, |
8318d78a | 835 | 0x0c, 0); |
95ea3627 ID |
836 | } |
837 | ||
838 | /* | |
839 | * Initialize Channel list. | |
840 | */ | |
841 | for (i = 0; i < spec->num_channels; i++) { | |
842 | if (spec->channels[i].channel <= 14) | |
843 | tx_power = spec->tx_power_bg[i]; | |
844 | else if (spec->tx_power_a) | |
845 | tx_power = spec->tx_power_a[i]; | |
846 | else | |
847 | tx_power = spec->tx_power_default; | |
848 | ||
849 | rt2x00lib_channel(&channels[i], | |
850 | spec->channels[i].channel, tx_power, i); | |
851 | } | |
852 | ||
853 | /* | |
854 | * Intitialize 802.11b | |
855 | * Rates: CCK. | |
8318d78a | 856 | * Channels: 2.4 GHz |
95ea3627 ID |
857 | */ |
858 | if (spec->num_modes > HWMODE_B) { | |
8318d78a JB |
859 | sbands[IEEE80211_BAND_2GHZ].n_channels = 14; |
860 | sbands[IEEE80211_BAND_2GHZ].n_bitrates = 4; | |
861 | sbands[IEEE80211_BAND_2GHZ].channels = channels; | |
862 | sbands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
863 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
95ea3627 ID |
864 | } |
865 | ||
866 | /* | |
867 | * Intitialize 802.11g | |
868 | * Rates: CCK, OFDM. | |
8318d78a | 869 | * Channels: 2.4 GHz |
95ea3627 ID |
870 | */ |
871 | if (spec->num_modes > HWMODE_G) { | |
8318d78a JB |
872 | sbands[IEEE80211_BAND_2GHZ].n_channels = 14; |
873 | sbands[IEEE80211_BAND_2GHZ].n_bitrates = spec->num_rates; | |
874 | sbands[IEEE80211_BAND_2GHZ].channels = channels; | |
875 | sbands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
876 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
95ea3627 ID |
877 | } |
878 | ||
879 | /* | |
880 | * Intitialize 802.11a | |
881 | * Rates: OFDM. | |
882 | * Channels: OFDM, UNII, HiperLAN2. | |
883 | */ | |
884 | if (spec->num_modes > HWMODE_A) { | |
8318d78a JB |
885 | sbands[IEEE80211_BAND_5GHZ].n_channels = spec->num_channels - 14; |
886 | sbands[IEEE80211_BAND_5GHZ].n_bitrates = spec->num_rates - 4; | |
887 | sbands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
888 | sbands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
889 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
95ea3627 ID |
890 | } |
891 | ||
95ea3627 ID |
892 | return 0; |
893 | ||
8318d78a | 894 | exit_free_channels: |
95ea3627 | 895 | kfree(channels); |
95ea3627 ID |
896 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
897 | return -ENOMEM; | |
898 | } | |
899 | ||
900 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
901 | { | |
066cb637 | 902 | if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
903 | ieee80211_unregister_hw(rt2x00dev->hw); |
904 | ||
8318d78a JB |
905 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
906 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
907 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
908 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
909 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 ID |
910 | } |
911 | } | |
912 | ||
913 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
914 | { | |
915 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
916 | int status; | |
917 | ||
918 | /* | |
919 | * Initialize HW modes. | |
920 | */ | |
921 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
922 | if (status) | |
923 | return status; | |
924 | ||
925 | /* | |
926 | * Register HW. | |
927 | */ | |
928 | status = ieee80211_register_hw(rt2x00dev->hw); | |
929 | if (status) { | |
930 | rt2x00lib_remove_hw(rt2x00dev); | |
931 | return status; | |
932 | } | |
933 | ||
066cb637 | 934 | __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
935 | |
936 | return 0; | |
937 | } | |
938 | ||
939 | /* | |
940 | * Initialization/uninitialization handlers. | |
941 | */ | |
e37ea213 | 942 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
943 | { |
944 | if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
945 | return; | |
946 | ||
947 | /* | |
948 | * Unregister rfkill. | |
949 | */ | |
950 | rt2x00rfkill_unregister(rt2x00dev); | |
951 | ||
952 | /* | |
953 | * Allow the HW to uninitialize. | |
954 | */ | |
955 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
956 | ||
957 | /* | |
181d6902 | 958 | * Free allocated queue entries. |
95ea3627 | 959 | */ |
181d6902 | 960 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
961 | } |
962 | ||
e37ea213 | 963 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
964 | { |
965 | int status; | |
966 | ||
967 | if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
968 | return 0; | |
969 | ||
970 | /* | |
181d6902 | 971 | * Allocate all queue entries. |
95ea3627 | 972 | */ |
181d6902 ID |
973 | status = rt2x00queue_initialize(rt2x00dev); |
974 | if (status) | |
95ea3627 | 975 | return status; |
95ea3627 ID |
976 | |
977 | /* | |
978 | * Initialize the device. | |
979 | */ | |
980 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
981 | if (status) | |
982 | goto exit; | |
983 | ||
984 | __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); | |
985 | ||
986 | /* | |
987 | * Register the rfkill handler. | |
988 | */ | |
989 | status = rt2x00rfkill_register(rt2x00dev); | |
990 | if (status) | |
181d6902 | 991 | goto exit; |
95ea3627 ID |
992 | |
993 | return 0; | |
994 | ||
95ea3627 | 995 | exit: |
181d6902 | 996 | rt2x00lib_uninitialize(rt2x00dev); |
95ea3627 ID |
997 | |
998 | return status; | |
999 | } | |
1000 | ||
e37ea213 ID |
1001 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1002 | { | |
1003 | int retval; | |
1004 | ||
1005 | if (test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1006 | return 0; | |
1007 | ||
1008 | /* | |
1009 | * If this is the first interface which is added, | |
1010 | * we should load the firmware now. | |
1011 | */ | |
9404ef34 ID |
1012 | retval = rt2x00lib_load_firmware(rt2x00dev); |
1013 | if (retval) | |
1014 | return retval; | |
e37ea213 ID |
1015 | |
1016 | /* | |
1017 | * Initialize the device. | |
1018 | */ | |
1019 | retval = rt2x00lib_initialize(rt2x00dev); | |
1020 | if (retval) | |
1021 | return retval; | |
1022 | ||
1023 | /* | |
1024 | * Enable radio. | |
1025 | */ | |
1026 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1027 | if (retval) { | |
1028 | rt2x00lib_uninitialize(rt2x00dev); | |
1029 | return retval; | |
1030 | } | |
1031 | ||
6bb40dd1 ID |
1032 | rt2x00dev->intf_ap_count = 0; |
1033 | rt2x00dev->intf_sta_count = 0; | |
1034 | rt2x00dev->intf_associated = 0; | |
1035 | ||
e37ea213 ID |
1036 | __set_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1042 | { | |
1043 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1044 | return; | |
1045 | ||
1046 | /* | |
1047 | * Perhaps we can add something smarter here, | |
1048 | * but for now just disabling the radio should do. | |
1049 | */ | |
1050 | rt2x00lib_disable_radio(rt2x00dev); | |
1051 | ||
6bb40dd1 ID |
1052 | rt2x00dev->intf_ap_count = 0; |
1053 | rt2x00dev->intf_sta_count = 0; | |
1054 | rt2x00dev->intf_associated = 0; | |
1055 | ||
e37ea213 ID |
1056 | __clear_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1057 | } | |
1058 | ||
95ea3627 ID |
1059 | /* |
1060 | * driver allocation handlers. | |
1061 | */ | |
95ea3627 ID |
1062 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
1063 | { | |
1064 | int retval = -ENOMEM; | |
1065 | ||
6bb40dd1 ID |
1066 | /* |
1067 | * Make room for rt2x00_intf inside the per-interface | |
1068 | * structure ieee80211_vif. | |
1069 | */ | |
1070 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
1071 | ||
95ea3627 ID |
1072 | /* |
1073 | * Let the driver probe the device to detect the capabilities. | |
1074 | */ | |
1075 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1076 | if (retval) { | |
1077 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1078 | goto exit; | |
1079 | } | |
1080 | ||
1081 | /* | |
1082 | * Initialize configuration work. | |
1083 | */ | |
6bb40dd1 | 1084 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); |
4150c572 | 1085 | INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); |
95ea3627 ID |
1086 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); |
1087 | ||
95ea3627 | 1088 | /* |
181d6902 | 1089 | * Allocate queue array. |
95ea3627 | 1090 | */ |
181d6902 | 1091 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1092 | if (retval) |
1093 | goto exit; | |
1094 | ||
1095 | /* | |
1096 | * Initialize ieee80211 structure. | |
1097 | */ | |
1098 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1099 | if (retval) { | |
1100 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1101 | goto exit; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Allocatie rfkill. | |
1106 | */ | |
1107 | retval = rt2x00rfkill_allocate(rt2x00dev); | |
1108 | if (retval) | |
1109 | goto exit; | |
1110 | ||
1111 | /* | |
1112 | * Open the debugfs entry. | |
1113 | */ | |
1114 | rt2x00debug_register(rt2x00dev); | |
1115 | ||
066cb637 ID |
1116 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1117 | ||
95ea3627 ID |
1118 | return 0; |
1119 | ||
1120 | exit: | |
1121 | rt2x00lib_remove_dev(rt2x00dev); | |
1122 | ||
1123 | return retval; | |
1124 | } | |
1125 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1126 | ||
1127 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1128 | { | |
066cb637 ID |
1129 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1130 | ||
95ea3627 ID |
1131 | /* |
1132 | * Disable radio. | |
1133 | */ | |
1134 | rt2x00lib_disable_radio(rt2x00dev); | |
1135 | ||
1136 | /* | |
1137 | * Uninitialize device. | |
1138 | */ | |
1139 | rt2x00lib_uninitialize(rt2x00dev); | |
1140 | ||
1141 | /* | |
1142 | * Close debugfs entry. | |
1143 | */ | |
1144 | rt2x00debug_deregister(rt2x00dev); | |
1145 | ||
1146 | /* | |
1147 | * Free rfkill | |
1148 | */ | |
1149 | rt2x00rfkill_free(rt2x00dev); | |
1150 | ||
1151 | /* | |
1152 | * Free ieee80211_hw memory. | |
1153 | */ | |
1154 | rt2x00lib_remove_hw(rt2x00dev); | |
1155 | ||
1156 | /* | |
1157 | * Free firmware image. | |
1158 | */ | |
1159 | rt2x00lib_free_firmware(rt2x00dev); | |
1160 | ||
1161 | /* | |
181d6902 | 1162 | * Free queue structures. |
95ea3627 | 1163 | */ |
181d6902 | 1164 | rt2x00queue_free(rt2x00dev); |
95ea3627 ID |
1165 | } |
1166 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1167 | ||
1168 | /* | |
1169 | * Device state handlers | |
1170 | */ | |
1171 | #ifdef CONFIG_PM | |
1172 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1173 | { | |
1174 | int retval; | |
1175 | ||
1176 | NOTICE(rt2x00dev, "Going to sleep.\n"); | |
066cb637 ID |
1177 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1178 | ||
1179 | /* | |
1180 | * Only continue if mac80211 has open interfaces. | |
1181 | */ | |
1182 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1183 | goto exit; | |
6d7f9877 | 1184 | __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); |
95ea3627 ID |
1185 | |
1186 | /* | |
1187 | * Disable radio and unitialize all items | |
1188 | * that must be recreated on resume. | |
1189 | */ | |
e37ea213 | 1190 | rt2x00lib_stop(rt2x00dev); |
95ea3627 ID |
1191 | rt2x00lib_uninitialize(rt2x00dev); |
1192 | rt2x00debug_deregister(rt2x00dev); | |
1193 | ||
066cb637 | 1194 | exit: |
95ea3627 ID |
1195 | /* |
1196 | * Set device mode to sleep for power management. | |
1197 | */ | |
1198 | retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); | |
1199 | if (retval) | |
1200 | return retval; | |
1201 | ||
1202 | return 0; | |
1203 | } | |
1204 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1205 | ||
6bb40dd1 ID |
1206 | static void rt2x00lib_resume_intf(void *data, u8 *mac, |
1207 | struct ieee80211_vif *vif) | |
1208 | { | |
1209 | struct rt2x00_dev *rt2x00dev = data; | |
1210 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
1211 | ||
1212 | spin_lock(&intf->lock); | |
1213 | ||
1214 | rt2x00lib_config_intf(rt2x00dev, intf, | |
1215 | vif->type, intf->mac, intf->bssid); | |
1216 | ||
1217 | ||
1218 | /* | |
1219 | * Master or Ad-hoc mode require a new beacon update. | |
1220 | */ | |
1221 | if (vif->type == IEEE80211_IF_TYPE_AP || | |
1222 | vif->type == IEEE80211_IF_TYPE_IBSS) | |
1223 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
1224 | ||
1225 | spin_unlock(&intf->lock); | |
1226 | } | |
1227 | ||
95ea3627 ID |
1228 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) |
1229 | { | |
95ea3627 ID |
1230 | int retval; |
1231 | ||
1232 | NOTICE(rt2x00dev, "Waking up.\n"); | |
95ea3627 ID |
1233 | |
1234 | /* | |
1235 | * Open the debugfs entry. | |
1236 | */ | |
1237 | rt2x00debug_register(rt2x00dev); | |
1238 | ||
066cb637 | 1239 | /* |
6d7f9877 | 1240 | * Only continue if mac80211 had open interfaces. |
066cb637 | 1241 | */ |
6d7f9877 | 1242 | if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) |
066cb637 ID |
1243 | return 0; |
1244 | ||
95ea3627 ID |
1245 | /* |
1246 | * Reinitialize device and all active interfaces. | |
1247 | */ | |
e37ea213 | 1248 | retval = rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
1249 | if (retval) |
1250 | goto exit; | |
1251 | ||
1252 | /* | |
1253 | * Reconfigure device. | |
1254 | */ | |
066cb637 ID |
1255 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); |
1256 | if (!rt2x00dev->hw->conf.radio_enabled) | |
1257 | rt2x00lib_disable_radio(rt2x00dev); | |
95ea3627 | 1258 | |
6bb40dd1 ID |
1259 | /* |
1260 | * Iterator over each active interface to | |
1261 | * reconfigure the hardware. | |
1262 | */ | |
1263 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, | |
1264 | rt2x00lib_resume_intf, rt2x00dev); | |
95ea3627 | 1265 | |
e37ea213 ID |
1266 | /* |
1267 | * We are ready again to receive requests from mac80211. | |
1268 | */ | |
1269 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); | |
1270 | ||
066cb637 ID |
1271 | /* |
1272 | * It is possible that during that mac80211 has attempted | |
1273 | * to send frames while we were suspending or resuming. | |
1274 | * In that case we have disabled the TX queue and should | |
1275 | * now enable it again | |
1276 | */ | |
1277 | ieee80211_start_queues(rt2x00dev->hw); | |
1278 | ||
95ea3627 | 1279 | /* |
6bb40dd1 ID |
1280 | * During interface iteration we might have changed the |
1281 | * delayed_flags, time to handles the event by calling | |
1282 | * the work handler directly. | |
95ea3627 | 1283 | */ |
6bb40dd1 | 1284 | rt2x00lib_intf_scheduled(&rt2x00dev->intf_work); |
95ea3627 | 1285 | |
95ea3627 ID |
1286 | return 0; |
1287 | ||
1288 | exit: | |
1289 | rt2x00lib_disable_radio(rt2x00dev); | |
1290 | rt2x00lib_uninitialize(rt2x00dev); | |
1291 | rt2x00debug_deregister(rt2x00dev); | |
1292 | ||
95ea3627 ID |
1293 | return retval; |
1294 | } | |
1295 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1296 | #endif /* CONFIG_PM */ | |
1297 | ||
1298 | /* | |
1299 | * rt2x00lib module information. | |
1300 | */ | |
1301 | MODULE_AUTHOR(DRV_PROJECT); | |
1302 | MODULE_VERSION(DRV_VERSION); | |
1303 | MODULE_DESCRIPTION("rt2x00 library"); | |
1304 | MODULE_LICENSE("GPL"); |