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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 | */ | |
a2e1d52a ID |
111 | status = |
112 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON); | |
95ea3627 ID |
113 | if (status) |
114 | return status; | |
115 | ||
a2e1d52a ID |
116 | rt2x00leds_led_radio(rt2x00dev, true); |
117 | ||
95ea3627 ID |
118 | __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags); |
119 | ||
120 | /* | |
121 | * Enable RX. | |
122 | */ | |
5cbf830e | 123 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 ID |
124 | |
125 | /* | |
126 | * Start the TX queues. | |
127 | */ | |
128 | ieee80211_start_queues(rt2x00dev->hw); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
134 | { | |
135 | if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
136 | return; | |
137 | ||
138 | /* | |
4150c572 | 139 | * Stop all scheduled work. |
95ea3627 | 140 | */ |
6bb40dd1 ID |
141 | if (work_pending(&rt2x00dev->intf_work)) |
142 | cancel_work_sync(&rt2x00dev->intf_work); | |
4150c572 JB |
143 | if (work_pending(&rt2x00dev->filter_work)) |
144 | cancel_work_sync(&rt2x00dev->filter_work); | |
95ea3627 ID |
145 | |
146 | /* | |
147 | * Stop the TX queues. | |
148 | */ | |
149 | ieee80211_stop_queues(rt2x00dev->hw); | |
150 | ||
151 | /* | |
152 | * Disable RX. | |
153 | */ | |
5cbf830e | 154 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
155 | |
156 | /* | |
157 | * Disable radio. | |
158 | */ | |
159 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
a2e1d52a | 160 | rt2x00leds_led_radio(rt2x00dev, false); |
95ea3627 ID |
161 | } |
162 | ||
5cbf830e | 163 | void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) |
95ea3627 | 164 | { |
95ea3627 ID |
165 | /* |
166 | * When we are disabling the RX, we should also stop the link tuner. | |
167 | */ | |
5cbf830e | 168 | if (state == STATE_RADIO_RX_OFF) |
95ea3627 ID |
169 | rt2x00lib_stop_link_tuner(rt2x00dev); |
170 | ||
171 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); | |
172 | ||
173 | /* | |
174 | * When we are enabling the RX, we should also start the link tuner. | |
175 | */ | |
5cbf830e | 176 | if (state == STATE_RADIO_RX_ON && |
6bb40dd1 | 177 | (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count)) |
95ea3627 ID |
178 | rt2x00lib_start_link_tuner(rt2x00dev); |
179 | } | |
180 | ||
69f81a2c ID |
181 | static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev) |
182 | { | |
183 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
184 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
185 | int sample_a = | |
186 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A); | |
187 | int sample_b = | |
188 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B); | |
189 | ||
190 | /* | |
191 | * We are done sampling. Now we should evaluate the results. | |
192 | */ | |
193 | rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE; | |
194 | ||
195 | /* | |
196 | * During the last period we have sampled the RSSI | |
197 | * from both antenna's. It now is time to determine | |
198 | * which antenna demonstrated the best performance. | |
199 | * When we are already on the antenna with the best | |
200 | * performance, then there really is nothing for us | |
201 | * left to do. | |
202 | */ | |
203 | if (sample_a == sample_b) | |
204 | return; | |
205 | ||
05253c93 ID |
206 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) |
207 | rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c | 208 | |
05253c93 ID |
209 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) |
210 | tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c ID |
211 | |
212 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
213 | } | |
214 | ||
215 | static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev) | |
216 | { | |
217 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
218 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
219 | int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link); | |
220 | int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr); | |
221 | ||
222 | /* | |
223 | * Legacy driver indicates that we should swap antenna's | |
224 | * when the difference in RSSI is greater that 5. This | |
225 | * also should be done when the RSSI was actually better | |
226 | * then the previous sample. | |
227 | * When the difference exceeds the threshold we should | |
228 | * sample the rssi from the other antenna to make a valid | |
229 | * comparison between the 2 antennas. | |
230 | */ | |
b290d433 | 231 | if (abs(rssi_curr - rssi_old) < 5) |
69f81a2c ID |
232 | return; |
233 | ||
234 | rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE; | |
235 | ||
236 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) | |
237 | rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
238 | ||
239 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) | |
240 | tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
241 | ||
242 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
243 | } | |
244 | ||
245 | static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev) | |
246 | { | |
247 | /* | |
248 | * Determine if software diversity is enabled for | |
249 | * either the TX or RX antenna (or both). | |
250 | * Always perform this check since within the link | |
251 | * tuner interval the configuration might have changed. | |
252 | */ | |
253 | rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY; | |
254 | rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY; | |
255 | ||
256 | if (rt2x00dev->hw->conf.antenna_sel_rx == 0 && | |
b290d433 | 257 | rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
258 | rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY; |
259 | if (rt2x00dev->hw->conf.antenna_sel_tx == 0 && | |
b290d433 | 260 | rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
261 | rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY; |
262 | ||
263 | if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) && | |
264 | !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) { | |
05253c93 | 265 | rt2x00dev->link.ant.flags = 0; |
69f81a2c ID |
266 | return; |
267 | } | |
268 | ||
269 | /* | |
270 | * If we have only sampled the data over the last period | |
271 | * we should now harvest the data. Otherwise just evaluate | |
272 | * the data. The latter should only be performed once | |
273 | * every 2 seconds. | |
274 | */ | |
275 | if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE) | |
276 | rt2x00lib_evaluate_antenna_sample(rt2x00dev); | |
277 | else if (rt2x00dev->link.count & 1) | |
278 | rt2x00lib_evaluate_antenna_eval(rt2x00dev); | |
279 | } | |
280 | ||
281 | static void rt2x00lib_update_link_stats(struct link *link, int rssi) | |
282 | { | |
283 | int avg_rssi = rssi; | |
284 | ||
285 | /* | |
286 | * Update global RSSI | |
287 | */ | |
288 | if (link->qual.avg_rssi) | |
289 | avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8); | |
290 | link->qual.avg_rssi = avg_rssi; | |
291 | ||
292 | /* | |
293 | * Update antenna RSSI | |
294 | */ | |
295 | if (link->ant.rssi_ant) | |
296 | rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8); | |
297 | link->ant.rssi_ant = rssi; | |
298 | } | |
299 | ||
ebcf26da | 300 | static void rt2x00lib_precalculate_link_signal(struct link_qual *qual) |
95ea3627 | 301 | { |
ebcf26da ID |
302 | if (qual->rx_failed || qual->rx_success) |
303 | qual->rx_percentage = | |
304 | (qual->rx_success * 100) / | |
305 | (qual->rx_failed + qual->rx_success); | |
95ea3627 | 306 | else |
ebcf26da | 307 | qual->rx_percentage = 50; |
95ea3627 | 308 | |
ebcf26da ID |
309 | if (qual->tx_failed || qual->tx_success) |
310 | qual->tx_percentage = | |
311 | (qual->tx_success * 100) / | |
312 | (qual->tx_failed + qual->tx_success); | |
95ea3627 | 313 | else |
ebcf26da | 314 | qual->tx_percentage = 50; |
95ea3627 | 315 | |
ebcf26da ID |
316 | qual->rx_success = 0; |
317 | qual->rx_failed = 0; | |
318 | qual->tx_success = 0; | |
319 | qual->tx_failed = 0; | |
95ea3627 ID |
320 | } |
321 | ||
322 | static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, | |
323 | int rssi) | |
324 | { | |
325 | int rssi_percentage = 0; | |
326 | int signal; | |
327 | ||
328 | /* | |
329 | * We need a positive value for the RSSI. | |
330 | */ | |
331 | if (rssi < 0) | |
332 | rssi += rt2x00dev->rssi_offset; | |
333 | ||
334 | /* | |
335 | * Calculate the different percentages, | |
336 | * which will be used for the signal. | |
337 | */ | |
338 | if (rt2x00dev->rssi_offset) | |
339 | rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; | |
340 | ||
341 | /* | |
342 | * Add the individual percentages and use the WEIGHT | |
343 | * defines to calculate the current link signal. | |
344 | */ | |
345 | signal = ((WEIGHT_RSSI * rssi_percentage) + | |
ebcf26da ID |
346 | (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) + |
347 | (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100; | |
95ea3627 ID |
348 | |
349 | return (signal > 100) ? 100 : signal; | |
350 | } | |
351 | ||
352 | static void rt2x00lib_link_tuner(struct work_struct *work) | |
353 | { | |
354 | struct rt2x00_dev *rt2x00dev = | |
355 | container_of(work, struct rt2x00_dev, link.work.work); | |
356 | ||
25ab002f ID |
357 | /* |
358 | * When the radio is shutting down we should | |
359 | * immediately cease all link tuning. | |
360 | */ | |
361 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
362 | return; | |
363 | ||
95ea3627 ID |
364 | /* |
365 | * Update statistics. | |
366 | */ | |
ebcf26da | 367 | rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual); |
95ea3627 | 368 | rt2x00dev->low_level_stats.dot11FCSErrorCount += |
ebcf26da | 369 | rt2x00dev->link.qual.rx_failed; |
95ea3627 | 370 | |
95ea3627 ID |
371 | /* |
372 | * Only perform the link tuning when Link tuning | |
373 | * has been enabled (This could have been disabled from the EEPROM). | |
374 | */ | |
375 | if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) | |
376 | rt2x00dev->ops->lib->link_tuner(rt2x00dev); | |
377 | ||
725d99d4 ID |
378 | /* |
379 | * Precalculate a portion of the link signal which is | |
380 | * in based on the tx/rx success/failure counters. | |
381 | */ | |
ebcf26da | 382 | rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual); |
725d99d4 | 383 | |
a9450b70 ID |
384 | /* |
385 | * Send a signal to the led to update the led signal strength. | |
386 | */ | |
387 | rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi); | |
388 | ||
53b3f8e4 ID |
389 | /* |
390 | * Evaluate antenna setup, make this the last step since this could | |
391 | * possibly reset some statistics. | |
392 | */ | |
393 | rt2x00lib_evaluate_antenna(rt2x00dev); | |
394 | ||
95ea3627 ID |
395 | /* |
396 | * Increase tuner counter, and reschedule the next link tuner run. | |
397 | */ | |
398 | rt2x00dev->link.count++; | |
399 | queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, | |
400 | LINK_TUNE_INTERVAL); | |
401 | } | |
402 | ||
4150c572 JB |
403 | static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) |
404 | { | |
405 | struct rt2x00_dev *rt2x00dev = | |
406 | container_of(work, struct rt2x00_dev, filter_work); | |
5886d0db | 407 | |
133adf08 | 408 | rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter); |
4150c572 JB |
409 | } |
410 | ||
6bb40dd1 ID |
411 | static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, |
412 | struct ieee80211_vif *vif) | |
5c58ee51 | 413 | { |
6bb40dd1 ID |
414 | struct rt2x00_dev *rt2x00dev = data; |
415 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
416 | struct sk_buff *skb; | |
417 | struct ieee80211_tx_control control; | |
418 | struct ieee80211_bss_conf conf; | |
419 | int delayed_flags; | |
420 | ||
421 | /* | |
422 | * Copy all data we need during this action under the protection | |
423 | * of a spinlock. Otherwise race conditions might occur which results | |
424 | * into an invalid configuration. | |
425 | */ | |
426 | spin_lock(&intf->lock); | |
427 | ||
428 | memcpy(&conf, &intf->conf, sizeof(conf)); | |
429 | delayed_flags = intf->delayed_flags; | |
430 | intf->delayed_flags = 0; | |
431 | ||
432 | spin_unlock(&intf->lock); | |
433 | ||
434 | if (delayed_flags & DELAYED_UPDATE_BEACON) { | |
435 | skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control); | |
171afcd4 ID |
436 | if (skb && rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, |
437 | skb, &control)) | |
6bb40dd1 | 438 | dev_kfree_skb(skb); |
6bb40dd1 ID |
439 | } |
440 | ||
72810379 ID |
441 | if (delayed_flags & DELAYED_CONFIG_ERP) |
442 | rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf); | |
a2e1d52a ID |
443 | |
444 | if (delayed_flags & DELAYED_LED_ASSOC) | |
445 | rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); | |
6bb40dd1 | 446 | } |
5c58ee51 | 447 | |
6bb40dd1 ID |
448 | static void rt2x00lib_intf_scheduled(struct work_struct *work) |
449 | { | |
450 | struct rt2x00_dev *rt2x00dev = | |
451 | container_of(work, struct rt2x00_dev, intf_work); | |
471b3efd JB |
452 | |
453 | /* | |
6bb40dd1 ID |
454 | * Iterate over each interface and perform the |
455 | * requested configurations. | |
471b3efd | 456 | */ |
6bb40dd1 ID |
457 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
458 | rt2x00lib_intf_scheduled_iter, | |
459 | rt2x00dev); | |
5c58ee51 ID |
460 | } |
461 | ||
95ea3627 ID |
462 | /* |
463 | * Interrupt context handlers. | |
464 | */ | |
6bb40dd1 ID |
465 | static void rt2x00lib_beacondone_iter(void *data, u8 *mac, |
466 | struct ieee80211_vif *vif) | |
95ea3627 | 467 | { |
6bb40dd1 | 468 | struct rt2x00_intf *intf = vif_to_intf(vif); |
95ea3627 | 469 | |
6bb40dd1 ID |
470 | if (vif->type != IEEE80211_IF_TYPE_AP && |
471 | vif->type != IEEE80211_IF_TYPE_IBSS) | |
95ea3627 ID |
472 | return; |
473 | ||
6bb40dd1 ID |
474 | spin_lock(&intf->lock); |
475 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
476 | spin_unlock(&intf->lock); | |
95ea3627 ID |
477 | } |
478 | ||
479 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
480 | { | |
481 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
482 | return; | |
483 | ||
6bb40dd1 ID |
484 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
485 | rt2x00lib_beacondone_iter, | |
486 | rt2x00dev); | |
487 | ||
488 | queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work); | |
95ea3627 ID |
489 | } |
490 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
491 | ||
181d6902 ID |
492 | void rt2x00lib_txdone(struct queue_entry *entry, |
493 | struct txdone_entry_desc *txdesc) | |
95ea3627 | 494 | { |
181d6902 | 495 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
baf26a7e | 496 | struct skb_frame_desc *skbdesc; |
181d6902 ID |
497 | struct ieee80211_tx_status tx_status; |
498 | int success = !!(txdesc->status == TX_SUCCESS || | |
499 | txdesc->status == TX_SUCCESS_RETRY); | |
500 | int fail = !!(txdesc->status == TX_FAIL_RETRY || | |
501 | txdesc->status == TX_FAIL_INVALID || | |
502 | txdesc->status == TX_FAIL_OTHER); | |
95ea3627 ID |
503 | |
504 | /* | |
505 | * Update TX statistics. | |
506 | */ | |
ebcf26da | 507 | rt2x00dev->link.qual.tx_success += success; |
181d6902 | 508 | rt2x00dev->link.qual.tx_failed += txdesc->retry + fail; |
95ea3627 | 509 | |
181d6902 ID |
510 | /* |
511 | * Initialize TX status | |
512 | */ | |
513 | tx_status.flags = 0; | |
514 | tx_status.ack_signal = 0; | |
515 | tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY); | |
516 | tx_status.retry_count = txdesc->retry; | |
95db4d4d | 517 | memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control)); |
181d6902 ID |
518 | |
519 | if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) { | |
95ea3627 | 520 | if (success) |
181d6902 | 521 | tx_status.flags |= IEEE80211_TX_STATUS_ACK; |
95ea3627 | 522 | else |
181d6902 | 523 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
524 | } |
525 | ||
181d6902 ID |
526 | tx_status.queue_length = entry->queue->limit; |
527 | tx_status.queue_number = tx_status.control.queue; | |
95ea3627 | 528 | |
181d6902 | 529 | if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { |
95ea3627 | 530 | if (success) |
181d6902 | 531 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
95ea3627 | 532 | else |
181d6902 | 533 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
534 | } |
535 | ||
536 | /* | |
baf26a7e ID |
537 | * Send the tx_status to debugfs. Only send the status report |
538 | * to mac80211 when the frame originated from there. If this was | |
539 | * a extra frame coming through a mac80211 library call (RTS/CTS) | |
540 | * then we should not send the status report back. | |
541 | * If send to mac80211, mac80211 will clean up the skb structure, | |
542 | * otherwise we have to do it ourself. | |
95ea3627 | 543 | */ |
baf26a7e ID |
544 | skbdesc = get_skb_frame_desc(entry->skb); |
545 | skbdesc->frame_type = DUMP_FRAME_TXDONE; | |
546 | ||
4d8dd66c | 547 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); |
baf26a7e ID |
548 | |
549 | if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED)) | |
550 | ieee80211_tx_status_irqsafe(rt2x00dev->hw, | |
551 | entry->skb, &tx_status); | |
552 | else | |
553 | dev_kfree_skb(entry->skb); | |
95ea3627 ID |
554 | entry->skb = NULL; |
555 | } | |
556 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
557 | ||
181d6902 ID |
558 | void rt2x00lib_rxdone(struct queue_entry *entry, |
559 | struct rxdone_entry_desc *rxdesc) | |
95ea3627 | 560 | { |
181d6902 | 561 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
95ea3627 | 562 | struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; |
8318d78a | 563 | struct ieee80211_supported_band *sband; |
61af43c5 | 564 | struct ieee80211_hdr *hdr; |
70e2fed4 | 565 | const struct rt2x00_rate *rate; |
95ea3627 | 566 | unsigned int i; |
70e2fed4 | 567 | int idx = -1; |
61af43c5 | 568 | u16 fc; |
95ea3627 ID |
569 | |
570 | /* | |
571 | * Update RX statistics. | |
572 | */ | |
8318d78a JB |
573 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; |
574 | for (i = 0; i < sband->n_bitrates; i++) { | |
70e2fed4 | 575 | rate = rt2x00_get_rate(sband->bitrates[i].hw_value); |
95ea3627 | 576 | |
19d30e02 ID |
577 | if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) && |
578 | (rate->plcp == rxdesc->signal)) || | |
579 | (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) && | |
580 | (rate->bitrate == rxdesc->signal))) { | |
8318d78a | 581 | idx = i; |
95ea3627 ID |
582 | break; |
583 | } | |
584 | } | |
585 | ||
866a0503 ID |
586 | if (idx < 0) { |
587 | WARNING(rt2x00dev, "Frame received with unrecognized signal," | |
588 | "signal=0x%.2x, plcp=%d.\n", rxdesc->signal, | |
589 | !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP)); | |
590 | idx = 0; | |
591 | } | |
592 | ||
61af43c5 | 593 | /* |
7e56d38d | 594 | * Only update link status if this is a beacon frame carrying our bssid. |
61af43c5 | 595 | */ |
70e2fed4 | 596 | hdr = (struct ieee80211_hdr *)entry->skb->data; |
7e56d38d | 597 | fc = le16_to_cpu(hdr->frame_control); |
19d30e02 | 598 | if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS)) |
181d6902 | 599 | rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi); |
61af43c5 | 600 | |
ebcf26da | 601 | rt2x00dev->link.qual.rx_success++; |
69f81a2c | 602 | |
8318d78a | 603 | rx_status->rate_idx = idx; |
4150c572 | 604 | rx_status->signal = |
181d6902 ID |
605 | rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi); |
606 | rx_status->ssi = rxdesc->rssi; | |
607 | rx_status->flag = rxdesc->flags; | |
69f81a2c | 608 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 ID |
609 | |
610 | /* | |
181d6902 ID |
611 | * Send frame to mac80211 & debugfs. |
612 | * mac80211 will clean up the skb structure. | |
95ea3627 | 613 | */ |
181d6902 ID |
614 | get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE; |
615 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); | |
616 | ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status); | |
617 | entry->skb = NULL; | |
95ea3627 ID |
618 | } |
619 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
620 | ||
621 | /* | |
622 | * TX descriptor initializer | |
623 | */ | |
624 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
08992f7f | 625 | struct sk_buff *skb, |
95ea3627 ID |
626 | struct ieee80211_tx_control *control) |
627 | { | |
181d6902 ID |
628 | struct txentry_desc txdesc; |
629 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); | |
3976ae6c | 630 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data; |
70e2fed4 | 631 | const struct rt2x00_rate *rate; |
95ea3627 | 632 | int tx_rate; |
08992f7f | 633 | int length; |
95ea3627 ID |
634 | int duration; |
635 | int residual; | |
636 | u16 frame_control; | |
637 | u16 seq_ctrl; | |
638 | ||
181d6902 | 639 | memset(&txdesc, 0, sizeof(txdesc)); |
95ea3627 | 640 | |
091ed315 | 641 | txdesc.queue = skbdesc->entry->queue->qid; |
181d6902 ID |
642 | txdesc.cw_min = skbdesc->entry->queue->cw_min; |
643 | txdesc.cw_max = skbdesc->entry->queue->cw_max; | |
644 | txdesc.aifs = skbdesc->entry->queue->aifs; | |
95ea3627 | 645 | |
95ea3627 ID |
646 | /* |
647 | * Read required fields from ieee80211 header. | |
648 | */ | |
70e2fed4 ID |
649 | frame_control = le16_to_cpu(hdr->frame_control); |
650 | seq_ctrl = le16_to_cpu(hdr->seq_ctrl); | |
95ea3627 | 651 | |
8318d78a | 652 | tx_rate = control->tx_rate->hw_value; |
95ea3627 | 653 | |
2700f8b0 MN |
654 | /* |
655 | * Check whether this frame is to be acked | |
656 | */ | |
657 | if (!(control->flags & IEEE80211_TXCTL_NO_ACK)) | |
181d6902 | 658 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); |
2700f8b0 | 659 | |
95ea3627 ID |
660 | /* |
661 | * Check if this is a RTS/CTS frame | |
662 | */ | |
663 | if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { | |
181d6902 | 664 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
2700f8b0 | 665 | if (is_rts_frame(frame_control)) { |
181d6902 ID |
666 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags); |
667 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); | |
2700f8b0 | 668 | } else |
181d6902 | 669 | __clear_bit(ENTRY_TXD_ACK, &txdesc.flags); |
95ea3627 | 670 | if (control->rts_cts_rate) |
8318d78a | 671 | tx_rate = control->rts_cts_rate->hw_value; |
95ea3627 ID |
672 | } |
673 | ||
70e2fed4 | 674 | rate = rt2x00_get_rate(tx_rate); |
95ea3627 ID |
675 | |
676 | /* | |
677 | * Check if more fragments are pending | |
678 | */ | |
70e2fed4 | 679 | if (ieee80211_get_morefrag(hdr)) { |
181d6902 ID |
680 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
681 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags); | |
95ea3627 ID |
682 | } |
683 | ||
684 | /* | |
685 | * Beacons and probe responses require the tsf timestamp | |
686 | * to be inserted into the frame. | |
687 | */ | |
5957da4c | 688 | if (control->queue == RT2X00_BCN_QUEUE_BEACON || |
95ea3627 | 689 | is_probe_resp(frame_control)) |
181d6902 | 690 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags); |
95ea3627 ID |
691 | |
692 | /* | |
693 | * Determine with what IFS priority this frame should be send. | |
694 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
695 | * or this fragment came after RTS/CTS. | |
696 | */ | |
697 | if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || | |
181d6902 ID |
698 | test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags)) |
699 | txdesc.ifs = IFS_SIFS; | |
95ea3627 | 700 | else |
181d6902 | 701 | txdesc.ifs = IFS_BACKOFF; |
95ea3627 ID |
702 | |
703 | /* | |
704 | * PLCP setup | |
705 | * Length calculation depends on OFDM/CCK rate. | |
706 | */ | |
70e2fed4 | 707 | txdesc.signal = rate->plcp; |
181d6902 | 708 | txdesc.service = 0x04; |
95ea3627 | 709 | |
3976ae6c | 710 | length = skbdesc->data_len + FCS_LEN; |
70e2fed4 ID |
711 | if (rate->flags & DEV_RATE_OFDM) { |
712 | __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags); | |
713 | ||
181d6902 ID |
714 | txdesc.length_high = (length >> 6) & 0x3f; |
715 | txdesc.length_low = length & 0x3f; | |
95ea3627 | 716 | } else { |
95ea3627 ID |
717 | /* |
718 | * Convert length to microseconds. | |
719 | */ | |
70e2fed4 ID |
720 | residual = get_duration_res(length, rate->bitrate); |
721 | duration = get_duration(length, rate->bitrate); | |
95ea3627 ID |
722 | |
723 | if (residual != 0) { | |
724 | duration++; | |
725 | ||
726 | /* | |
727 | * Check if we need to set the Length Extension | |
728 | */ | |
70e2fed4 | 729 | if (rate->bitrate == 110 && residual <= 30) |
181d6902 | 730 | txdesc.service |= 0x80; |
95ea3627 ID |
731 | } |
732 | ||
181d6902 ID |
733 | txdesc.length_high = (duration >> 8) & 0xff; |
734 | txdesc.length_low = duration & 0xff; | |
95ea3627 ID |
735 | |
736 | /* | |
737 | * When preamble is enabled we should set the | |
738 | * preamble bit for the signal. | |
739 | */ | |
70e2fed4 | 740 | if (rt2x00_get_rate_preamble(tx_rate)) |
181d6902 | 741 | txdesc.signal |= 0x08; |
95ea3627 ID |
742 | } |
743 | ||
181d6902 | 744 | rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control); |
08992f7f ID |
745 | |
746 | /* | |
181d6902 | 747 | * Update queue entry. |
08992f7f ID |
748 | */ |
749 | skbdesc->entry->skb = skb; | |
4d8dd66c ID |
750 | |
751 | /* | |
752 | * The frame has been completely initialized and ready | |
753 | * for sending to the device. The caller will push the | |
754 | * frame to the device, but we are going to push the | |
755 | * frame to debugfs here. | |
756 | */ | |
757 | skbdesc->frame_type = DUMP_FRAME_TX; | |
758 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
759 | } |
760 | EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); | |
761 | ||
762 | /* | |
763 | * Driver initialization handlers. | |
764 | */ | |
70e2fed4 ID |
765 | const struct rt2x00_rate rt2x00_supported_rates[12] = { |
766 | { | |
aa776721 | 767 | .flags = DEV_RATE_CCK | DEV_RATE_BASIC, |
70e2fed4 | 768 | .bitrate = 10, |
aa776721 | 769 | .ratemask = BIT(0), |
70e2fed4 ID |
770 | .plcp = 0x00, |
771 | }, | |
772 | { | |
aa776721 | 773 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC, |
70e2fed4 | 774 | .bitrate = 20, |
aa776721 | 775 | .ratemask = BIT(1), |
70e2fed4 ID |
776 | .plcp = 0x01, |
777 | }, | |
778 | { | |
aa776721 | 779 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC, |
70e2fed4 | 780 | .bitrate = 55, |
aa776721 | 781 | .ratemask = BIT(2), |
70e2fed4 ID |
782 | .plcp = 0x02, |
783 | }, | |
784 | { | |
aa776721 | 785 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC, |
70e2fed4 | 786 | .bitrate = 110, |
aa776721 | 787 | .ratemask = BIT(3), |
70e2fed4 ID |
788 | .plcp = 0x03, |
789 | }, | |
790 | { | |
aa776721 | 791 | .flags = DEV_RATE_OFDM | DEV_RATE_BASIC, |
70e2fed4 | 792 | .bitrate = 60, |
aa776721 | 793 | .ratemask = BIT(4), |
70e2fed4 ID |
794 | .plcp = 0x0b, |
795 | }, | |
796 | { | |
797 | .flags = DEV_RATE_OFDM, | |
798 | .bitrate = 90, | |
aa776721 | 799 | .ratemask = BIT(5), |
70e2fed4 ID |
800 | .plcp = 0x0f, |
801 | }, | |
802 | { | |
aa776721 | 803 | .flags = DEV_RATE_OFDM | DEV_RATE_BASIC, |
70e2fed4 | 804 | .bitrate = 120, |
aa776721 | 805 | .ratemask = BIT(6), |
70e2fed4 ID |
806 | .plcp = 0x0a, |
807 | }, | |
808 | { | |
809 | .flags = DEV_RATE_OFDM, | |
810 | .bitrate = 180, | |
aa776721 | 811 | .ratemask = BIT(7), |
70e2fed4 ID |
812 | .plcp = 0x0e, |
813 | }, | |
814 | { | |
aa776721 | 815 | .flags = DEV_RATE_OFDM | DEV_RATE_BASIC, |
70e2fed4 | 816 | .bitrate = 240, |
aa776721 | 817 | .ratemask = BIT(8), |
70e2fed4 ID |
818 | .plcp = 0x09, |
819 | }, | |
820 | { | |
821 | .flags = DEV_RATE_OFDM, | |
822 | .bitrate = 360, | |
aa776721 | 823 | .ratemask = BIT(9), |
70e2fed4 ID |
824 | .plcp = 0x0d, |
825 | }, | |
826 | { | |
827 | .flags = DEV_RATE_OFDM, | |
828 | .bitrate = 480, | |
aa776721 | 829 | .ratemask = BIT(10), |
70e2fed4 ID |
830 | .plcp = 0x08, |
831 | }, | |
832 | { | |
833 | .flags = DEV_RATE_OFDM, | |
834 | .bitrate = 540, | |
aa776721 | 835 | .ratemask = BIT(11), |
70e2fed4 ID |
836 | .plcp = 0x0c, |
837 | }, | |
838 | }; | |
839 | ||
95ea3627 ID |
840 | static void rt2x00lib_channel(struct ieee80211_channel *entry, |
841 | const int channel, const int tx_power, | |
842 | const int value) | |
843 | { | |
f2a3c7f5 | 844 | entry->center_freq = ieee80211_channel_to_frequency(channel); |
8318d78a JB |
845 | entry->hw_value = value; |
846 | entry->max_power = tx_power; | |
847 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
848 | } |
849 | ||
850 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
70e2fed4 | 851 | const u16 index, const struct rt2x00_rate *rate) |
95ea3627 | 852 | { |
70e2fed4 ID |
853 | entry->flags = 0; |
854 | entry->bitrate = rate->bitrate; | |
855 | entry->hw_value = rt2x00_create_rate_hw_value(index, 0); | |
8318d78a | 856 | entry->hw_value_short = entry->hw_value; |
70e2fed4 ID |
857 | |
858 | if (rate->flags & DEV_RATE_SHORT_PREAMBLE) { | |
859 | entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE; | |
860 | entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1); | |
861 | } | |
95ea3627 ID |
862 | } |
863 | ||
864 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
865 | struct hw_mode_spec *spec) | |
866 | { | |
867 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
95ea3627 ID |
868 | struct ieee80211_channel *channels; |
869 | struct ieee80211_rate *rates; | |
31562e80 | 870 | unsigned int num_rates; |
95ea3627 ID |
871 | unsigned int i; |
872 | unsigned char tx_power; | |
873 | ||
31562e80 ID |
874 | num_rates = 0; |
875 | if (spec->supported_rates & SUPPORT_RATE_CCK) | |
876 | num_rates += 4; | |
877 | if (spec->supported_rates & SUPPORT_RATE_OFDM) | |
878 | num_rates += 8; | |
95ea3627 ID |
879 | |
880 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
881 | if (!channels) | |
8318d78a | 882 | return -ENOMEM; |
95ea3627 | 883 | |
31562e80 | 884 | rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL); |
95ea3627 ID |
885 | if (!rates) |
886 | goto exit_free_channels; | |
887 | ||
888 | /* | |
889 | * Initialize Rate list. | |
890 | */ | |
31562e80 | 891 | for (i = 0; i < num_rates; i++) |
8f5fa7f0 | 892 | rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i)); |
95ea3627 ID |
893 | |
894 | /* | |
895 | * Initialize Channel list. | |
896 | */ | |
897 | for (i = 0; i < spec->num_channels; i++) { | |
31562e80 ID |
898 | if (spec->channels[i].channel <= 14) { |
899 | if (spec->tx_power_bg) | |
900 | tx_power = spec->tx_power_bg[i]; | |
901 | else | |
902 | tx_power = spec->tx_power_default; | |
903 | } else { | |
904 | if (spec->tx_power_a) | |
905 | tx_power = spec->tx_power_a[i]; | |
906 | else | |
907 | tx_power = spec->tx_power_default; | |
908 | } | |
95ea3627 ID |
909 | |
910 | rt2x00lib_channel(&channels[i], | |
911 | spec->channels[i].channel, tx_power, i); | |
912 | } | |
913 | ||
914 | /* | |
31562e80 | 915 | * Intitialize 802.11b, 802.11g |
95ea3627 | 916 | * Rates: CCK, OFDM. |
8318d78a | 917 | * Channels: 2.4 GHz |
95ea3627 | 918 | */ |
47ac2683 | 919 | if (spec->supported_bands & SUPPORT_BAND_2GHZ) { |
31562e80 ID |
920 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14; |
921 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates; | |
922 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels; | |
923 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
924 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = | |
925 | &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
95ea3627 ID |
926 | } |
927 | ||
928 | /* | |
929 | * Intitialize 802.11a | |
930 | * Rates: OFDM. | |
931 | * Channels: OFDM, UNII, HiperLAN2. | |
932 | */ | |
47ac2683 | 933 | if (spec->supported_bands & SUPPORT_BAND_5GHZ) { |
31562e80 ID |
934 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels = |
935 | spec->num_channels - 14; | |
936 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates = | |
937 | num_rates - 4; | |
938 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
939 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
940 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = | |
941 | &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
95ea3627 ID |
942 | } |
943 | ||
95ea3627 ID |
944 | return 0; |
945 | ||
8318d78a | 946 | exit_free_channels: |
95ea3627 | 947 | kfree(channels); |
95ea3627 ID |
948 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
949 | return -ENOMEM; | |
950 | } | |
951 | ||
952 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
953 | { | |
066cb637 | 954 | if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
955 | ieee80211_unregister_hw(rt2x00dev->hw); |
956 | ||
8318d78a JB |
957 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
958 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
959 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
960 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
961 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 ID |
962 | } |
963 | } | |
964 | ||
965 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
966 | { | |
967 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
968 | int status; | |
969 | ||
970 | /* | |
971 | * Initialize HW modes. | |
972 | */ | |
973 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
974 | if (status) | |
975 | return status; | |
976 | ||
977 | /* | |
978 | * Register HW. | |
979 | */ | |
980 | status = ieee80211_register_hw(rt2x00dev->hw); | |
981 | if (status) { | |
982 | rt2x00lib_remove_hw(rt2x00dev); | |
983 | return status; | |
984 | } | |
985 | ||
066cb637 | 986 | __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
987 | |
988 | return 0; | |
989 | } | |
990 | ||
991 | /* | |
992 | * Initialization/uninitialization handlers. | |
993 | */ | |
e37ea213 | 994 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
995 | { |
996 | if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
997 | return; | |
998 | ||
999 | /* | |
1682fe6d | 1000 | * Unregister extra components. |
95ea3627 ID |
1001 | */ |
1002 | rt2x00rfkill_unregister(rt2x00dev); | |
1003 | ||
1004 | /* | |
1005 | * Allow the HW to uninitialize. | |
1006 | */ | |
1007 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
1008 | ||
1009 | /* | |
181d6902 | 1010 | * Free allocated queue entries. |
95ea3627 | 1011 | */ |
181d6902 | 1012 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
1013 | } |
1014 | ||
e37ea213 | 1015 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1016 | { |
1017 | int status; | |
1018 | ||
1019 | if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1020 | return 0; | |
1021 | ||
1022 | /* | |
181d6902 | 1023 | * Allocate all queue entries. |
95ea3627 | 1024 | */ |
181d6902 ID |
1025 | status = rt2x00queue_initialize(rt2x00dev); |
1026 | if (status) | |
95ea3627 | 1027 | return status; |
95ea3627 ID |
1028 | |
1029 | /* | |
1030 | * Initialize the device. | |
1031 | */ | |
1032 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
1033 | if (status) | |
1034 | goto exit; | |
1035 | ||
1036 | __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); | |
1037 | ||
1038 | /* | |
1682fe6d | 1039 | * Register the extra components. |
95ea3627 | 1040 | */ |
1682fe6d | 1041 | rt2x00rfkill_register(rt2x00dev); |
95ea3627 ID |
1042 | |
1043 | return 0; | |
1044 | ||
95ea3627 | 1045 | exit: |
181d6902 | 1046 | rt2x00lib_uninitialize(rt2x00dev); |
95ea3627 ID |
1047 | |
1048 | return status; | |
1049 | } | |
1050 | ||
e37ea213 ID |
1051 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1052 | { | |
1053 | int retval; | |
1054 | ||
1055 | if (test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1056 | return 0; | |
1057 | ||
1058 | /* | |
1059 | * If this is the first interface which is added, | |
1060 | * we should load the firmware now. | |
1061 | */ | |
9404ef34 ID |
1062 | retval = rt2x00lib_load_firmware(rt2x00dev); |
1063 | if (retval) | |
1064 | return retval; | |
e37ea213 ID |
1065 | |
1066 | /* | |
1067 | * Initialize the device. | |
1068 | */ | |
1069 | retval = rt2x00lib_initialize(rt2x00dev); | |
1070 | if (retval) | |
1071 | return retval; | |
1072 | ||
1073 | /* | |
1074 | * Enable radio. | |
1075 | */ | |
1076 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1077 | if (retval) { | |
1078 | rt2x00lib_uninitialize(rt2x00dev); | |
1079 | return retval; | |
1080 | } | |
1081 | ||
6bb40dd1 ID |
1082 | rt2x00dev->intf_ap_count = 0; |
1083 | rt2x00dev->intf_sta_count = 0; | |
1084 | rt2x00dev->intf_associated = 0; | |
1085 | ||
e37ea213 ID |
1086 | __set_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1092 | { | |
1093 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1094 | return; | |
1095 | ||
1096 | /* | |
1097 | * Perhaps we can add something smarter here, | |
1098 | * but for now just disabling the radio should do. | |
1099 | */ | |
1100 | rt2x00lib_disable_radio(rt2x00dev); | |
1101 | ||
6bb40dd1 ID |
1102 | rt2x00dev->intf_ap_count = 0; |
1103 | rt2x00dev->intf_sta_count = 0; | |
1104 | rt2x00dev->intf_associated = 0; | |
1105 | ||
e37ea213 ID |
1106 | __clear_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1107 | } | |
1108 | ||
95ea3627 ID |
1109 | /* |
1110 | * driver allocation handlers. | |
1111 | */ | |
95ea3627 ID |
1112 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
1113 | { | |
1114 | int retval = -ENOMEM; | |
1115 | ||
6bb40dd1 ID |
1116 | /* |
1117 | * Make room for rt2x00_intf inside the per-interface | |
1118 | * structure ieee80211_vif. | |
1119 | */ | |
1120 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
1121 | ||
95ea3627 ID |
1122 | /* |
1123 | * Let the driver probe the device to detect the capabilities. | |
1124 | */ | |
1125 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1126 | if (retval) { | |
1127 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1128 | goto exit; | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Initialize configuration work. | |
1133 | */ | |
6bb40dd1 | 1134 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); |
4150c572 | 1135 | INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); |
95ea3627 ID |
1136 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); |
1137 | ||
95ea3627 | 1138 | /* |
181d6902 | 1139 | * Allocate queue array. |
95ea3627 | 1140 | */ |
181d6902 | 1141 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1142 | if (retval) |
1143 | goto exit; | |
1144 | ||
1145 | /* | |
1146 | * Initialize ieee80211 structure. | |
1147 | */ | |
1148 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1149 | if (retval) { | |
1150 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1151 | goto exit; | |
1152 | } | |
1153 | ||
a9450b70 | 1154 | /* |
1682fe6d | 1155 | * Register extra components. |
a9450b70 ID |
1156 | */ |
1157 | rt2x00leds_register(rt2x00dev); | |
1682fe6d | 1158 | rt2x00rfkill_allocate(rt2x00dev); |
95ea3627 ID |
1159 | rt2x00debug_register(rt2x00dev); |
1160 | ||
066cb637 ID |
1161 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1162 | ||
95ea3627 ID |
1163 | return 0; |
1164 | ||
1165 | exit: | |
1166 | rt2x00lib_remove_dev(rt2x00dev); | |
1167 | ||
1168 | return retval; | |
1169 | } | |
1170 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1171 | ||
1172 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1173 | { | |
066cb637 ID |
1174 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1175 | ||
95ea3627 ID |
1176 | /* |
1177 | * Disable radio. | |
1178 | */ | |
1179 | rt2x00lib_disable_radio(rt2x00dev); | |
1180 | ||
1181 | /* | |
1182 | * Uninitialize device. | |
1183 | */ | |
1184 | rt2x00lib_uninitialize(rt2x00dev); | |
1185 | ||
1186 | /* | |
1682fe6d | 1187 | * Free extra components |
95ea3627 ID |
1188 | */ |
1189 | rt2x00debug_deregister(rt2x00dev); | |
95ea3627 | 1190 | rt2x00rfkill_free(rt2x00dev); |
a9450b70 ID |
1191 | rt2x00leds_unregister(rt2x00dev); |
1192 | ||
95ea3627 ID |
1193 | /* |
1194 | * Free ieee80211_hw memory. | |
1195 | */ | |
1196 | rt2x00lib_remove_hw(rt2x00dev); | |
1197 | ||
1198 | /* | |
1199 | * Free firmware image. | |
1200 | */ | |
1201 | rt2x00lib_free_firmware(rt2x00dev); | |
1202 | ||
1203 | /* | |
181d6902 | 1204 | * Free queue structures. |
95ea3627 | 1205 | */ |
181d6902 | 1206 | rt2x00queue_free(rt2x00dev); |
95ea3627 ID |
1207 | } |
1208 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1209 | ||
1210 | /* | |
1211 | * Device state handlers | |
1212 | */ | |
1213 | #ifdef CONFIG_PM | |
1214 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1215 | { | |
1216 | int retval; | |
1217 | ||
1218 | NOTICE(rt2x00dev, "Going to sleep.\n"); | |
066cb637 ID |
1219 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1220 | ||
1221 | /* | |
1222 | * Only continue if mac80211 has open interfaces. | |
1223 | */ | |
1224 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1225 | goto exit; | |
6d7f9877 | 1226 | __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); |
95ea3627 ID |
1227 | |
1228 | /* | |
1682fe6d | 1229 | * Disable radio. |
95ea3627 | 1230 | */ |
e37ea213 | 1231 | rt2x00lib_stop(rt2x00dev); |
95ea3627 | 1232 | rt2x00lib_uninitialize(rt2x00dev); |
1682fe6d ID |
1233 | |
1234 | /* | |
1235 | * Suspend/disable extra components. | |
1236 | */ | |
a9450b70 | 1237 | rt2x00leds_suspend(rt2x00dev); |
1682fe6d | 1238 | rt2x00rfkill_suspend(rt2x00dev); |
95ea3627 ID |
1239 | rt2x00debug_deregister(rt2x00dev); |
1240 | ||
066cb637 | 1241 | exit: |
95ea3627 | 1242 | /* |
9896322a ID |
1243 | * Set device mode to sleep for power management, |
1244 | * on some hardware this call seems to consistently fail. | |
1245 | * From the specifications it is hard to tell why it fails, | |
1246 | * and if this is a "bad thing". | |
1247 | * Overall it is safe to just ignore the failure and | |
1248 | * continue suspending. The only downside is that the | |
1249 | * device will not be in optimal power save mode, but with | |
1250 | * the radio and the other components already disabled the | |
1251 | * device is as good as disabled. | |
95ea3627 ID |
1252 | */ |
1253 | retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); | |
1254 | if (retval) | |
9896322a ID |
1255 | WARNING(rt2x00dev, "Device failed to enter sleep state, " |
1256 | "continue suspending.\n"); | |
95ea3627 ID |
1257 | |
1258 | return 0; | |
1259 | } | |
1260 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1261 | ||
6bb40dd1 ID |
1262 | static void rt2x00lib_resume_intf(void *data, u8 *mac, |
1263 | struct ieee80211_vif *vif) | |
1264 | { | |
1265 | struct rt2x00_dev *rt2x00dev = data; | |
1266 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
1267 | ||
1268 | spin_lock(&intf->lock); | |
1269 | ||
1270 | rt2x00lib_config_intf(rt2x00dev, intf, | |
1271 | vif->type, intf->mac, intf->bssid); | |
1272 | ||
1273 | ||
1274 | /* | |
1275 | * Master or Ad-hoc mode require a new beacon update. | |
1276 | */ | |
1277 | if (vif->type == IEEE80211_IF_TYPE_AP || | |
1278 | vif->type == IEEE80211_IF_TYPE_IBSS) | |
1279 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
1280 | ||
1281 | spin_unlock(&intf->lock); | |
1282 | } | |
1283 | ||
95ea3627 ID |
1284 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) |
1285 | { | |
95ea3627 ID |
1286 | int retval; |
1287 | ||
1288 | NOTICE(rt2x00dev, "Waking up.\n"); | |
95ea3627 ID |
1289 | |
1290 | /* | |
1682fe6d | 1291 | * Restore/enable extra components. |
95ea3627 ID |
1292 | */ |
1293 | rt2x00debug_register(rt2x00dev); | |
1682fe6d | 1294 | rt2x00rfkill_resume(rt2x00dev); |
a9450b70 | 1295 | rt2x00leds_resume(rt2x00dev); |
95ea3627 | 1296 | |
066cb637 | 1297 | /* |
6d7f9877 | 1298 | * Only continue if mac80211 had open interfaces. |
066cb637 | 1299 | */ |
6d7f9877 | 1300 | if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) |
066cb637 ID |
1301 | return 0; |
1302 | ||
95ea3627 ID |
1303 | /* |
1304 | * Reinitialize device and all active interfaces. | |
1305 | */ | |
e37ea213 | 1306 | retval = rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
1307 | if (retval) |
1308 | goto exit; | |
1309 | ||
1310 | /* | |
1311 | * Reconfigure device. | |
1312 | */ | |
066cb637 ID |
1313 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); |
1314 | if (!rt2x00dev->hw->conf.radio_enabled) | |
1315 | rt2x00lib_disable_radio(rt2x00dev); | |
95ea3627 | 1316 | |
6bb40dd1 ID |
1317 | /* |
1318 | * Iterator over each active interface to | |
1319 | * reconfigure the hardware. | |
1320 | */ | |
1321 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, | |
1322 | rt2x00lib_resume_intf, rt2x00dev); | |
95ea3627 | 1323 | |
e37ea213 ID |
1324 | /* |
1325 | * We are ready again to receive requests from mac80211. | |
1326 | */ | |
1327 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); | |
1328 | ||
066cb637 ID |
1329 | /* |
1330 | * It is possible that during that mac80211 has attempted | |
1331 | * to send frames while we were suspending or resuming. | |
1332 | * In that case we have disabled the TX queue and should | |
1333 | * now enable it again | |
1334 | */ | |
1335 | ieee80211_start_queues(rt2x00dev->hw); | |
1336 | ||
95ea3627 | 1337 | /* |
6bb40dd1 ID |
1338 | * During interface iteration we might have changed the |
1339 | * delayed_flags, time to handles the event by calling | |
1340 | * the work handler directly. | |
95ea3627 | 1341 | */ |
6bb40dd1 | 1342 | rt2x00lib_intf_scheduled(&rt2x00dev->intf_work); |
95ea3627 | 1343 | |
95ea3627 ID |
1344 | return 0; |
1345 | ||
1346 | exit: | |
1347 | rt2x00lib_disable_radio(rt2x00dev); | |
1348 | rt2x00lib_uninitialize(rt2x00dev); | |
1349 | rt2x00debug_deregister(rt2x00dev); | |
1350 | ||
95ea3627 ID |
1351 | return retval; |
1352 | } | |
1353 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1354 | #endif /* CONFIG_PM */ | |
1355 | ||
1356 | /* | |
1357 | * rt2x00lib module information. | |
1358 | */ | |
1359 | MODULE_AUTHOR(DRV_PROJECT); | |
1360 | MODULE_VERSION(DRV_VERSION); | |
1361 | MODULE_DESCRIPTION("rt2x00 library"); | |
1362 | MODULE_LICENSE("GPL"); |