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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 | 116 | rt2x00leds_led_radio(rt2x00dev, true); |
61c2b682 | 117 | rt2x00led_led_activity(rt2x00dev, true); |
a2e1d52a | 118 | |
95ea3627 ID |
119 | __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags); |
120 | ||
121 | /* | |
122 | * Enable RX. | |
123 | */ | |
5cbf830e | 124 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 ID |
125 | |
126 | /* | |
127 | * Start the TX queues. | |
128 | */ | |
129 | ieee80211_start_queues(rt2x00dev->hw); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
135 | { | |
136 | if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
137 | return; | |
138 | ||
139 | /* | |
4150c572 | 140 | * Stop all scheduled work. |
95ea3627 | 141 | */ |
6bb40dd1 ID |
142 | if (work_pending(&rt2x00dev->intf_work)) |
143 | cancel_work_sync(&rt2x00dev->intf_work); | |
4150c572 JB |
144 | if (work_pending(&rt2x00dev->filter_work)) |
145 | cancel_work_sync(&rt2x00dev->filter_work); | |
95ea3627 ID |
146 | |
147 | /* | |
148 | * Stop the TX queues. | |
149 | */ | |
150 | ieee80211_stop_queues(rt2x00dev->hw); | |
151 | ||
152 | /* | |
153 | * Disable RX. | |
154 | */ | |
5cbf830e | 155 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
156 | |
157 | /* | |
158 | * Disable radio. | |
159 | */ | |
160 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
61c2b682 | 161 | rt2x00led_led_activity(rt2x00dev, false); |
a2e1d52a | 162 | rt2x00leds_led_radio(rt2x00dev, false); |
95ea3627 ID |
163 | } |
164 | ||
5cbf830e | 165 | void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) |
95ea3627 | 166 | { |
95ea3627 ID |
167 | /* |
168 | * When we are disabling the RX, we should also stop the link tuner. | |
169 | */ | |
5cbf830e | 170 | if (state == STATE_RADIO_RX_OFF) |
95ea3627 ID |
171 | rt2x00lib_stop_link_tuner(rt2x00dev); |
172 | ||
173 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); | |
174 | ||
175 | /* | |
176 | * When we are enabling the RX, we should also start the link tuner. | |
177 | */ | |
5cbf830e | 178 | if (state == STATE_RADIO_RX_ON && |
6bb40dd1 | 179 | (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count)) |
95ea3627 ID |
180 | rt2x00lib_start_link_tuner(rt2x00dev); |
181 | } | |
182 | ||
69f81a2c ID |
183 | static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev) |
184 | { | |
185 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
186 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
187 | int sample_a = | |
188 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A); | |
189 | int sample_b = | |
190 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B); | |
191 | ||
192 | /* | |
193 | * We are done sampling. Now we should evaluate the results. | |
194 | */ | |
195 | rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE; | |
196 | ||
197 | /* | |
198 | * During the last period we have sampled the RSSI | |
199 | * from both antenna's. It now is time to determine | |
200 | * which antenna demonstrated the best performance. | |
201 | * When we are already on the antenna with the best | |
202 | * performance, then there really is nothing for us | |
203 | * left to do. | |
204 | */ | |
205 | if (sample_a == sample_b) | |
206 | return; | |
207 | ||
05253c93 ID |
208 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) |
209 | rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c | 210 | |
05253c93 ID |
211 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) |
212 | tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c ID |
213 | |
214 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
215 | } | |
216 | ||
217 | static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev) | |
218 | { | |
219 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
220 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
221 | int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link); | |
222 | int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr); | |
223 | ||
224 | /* | |
225 | * Legacy driver indicates that we should swap antenna's | |
226 | * when the difference in RSSI is greater that 5. This | |
227 | * also should be done when the RSSI was actually better | |
228 | * then the previous sample. | |
229 | * When the difference exceeds the threshold we should | |
230 | * sample the rssi from the other antenna to make a valid | |
231 | * comparison between the 2 antennas. | |
232 | */ | |
b290d433 | 233 | if (abs(rssi_curr - rssi_old) < 5) |
69f81a2c ID |
234 | return; |
235 | ||
236 | rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE; | |
237 | ||
238 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) | |
239 | rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
240 | ||
241 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) | |
242 | tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
243 | ||
244 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
245 | } | |
246 | ||
247 | static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev) | |
248 | { | |
249 | /* | |
250 | * Determine if software diversity is enabled for | |
251 | * either the TX or RX antenna (or both). | |
252 | * Always perform this check since within the link | |
253 | * tuner interval the configuration might have changed. | |
254 | */ | |
255 | rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY; | |
256 | rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY; | |
257 | ||
258 | if (rt2x00dev->hw->conf.antenna_sel_rx == 0 && | |
b290d433 | 259 | rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
260 | rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY; |
261 | if (rt2x00dev->hw->conf.antenna_sel_tx == 0 && | |
b290d433 | 262 | rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
263 | rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY; |
264 | ||
265 | if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) && | |
266 | !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) { | |
05253c93 | 267 | rt2x00dev->link.ant.flags = 0; |
69f81a2c ID |
268 | return; |
269 | } | |
270 | ||
271 | /* | |
272 | * If we have only sampled the data over the last period | |
273 | * we should now harvest the data. Otherwise just evaluate | |
274 | * the data. The latter should only be performed once | |
275 | * every 2 seconds. | |
276 | */ | |
277 | if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE) | |
278 | rt2x00lib_evaluate_antenna_sample(rt2x00dev); | |
279 | else if (rt2x00dev->link.count & 1) | |
280 | rt2x00lib_evaluate_antenna_eval(rt2x00dev); | |
281 | } | |
282 | ||
283 | static void rt2x00lib_update_link_stats(struct link *link, int rssi) | |
284 | { | |
285 | int avg_rssi = rssi; | |
286 | ||
287 | /* | |
288 | * Update global RSSI | |
289 | */ | |
290 | if (link->qual.avg_rssi) | |
291 | avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8); | |
292 | link->qual.avg_rssi = avg_rssi; | |
293 | ||
294 | /* | |
295 | * Update antenna RSSI | |
296 | */ | |
297 | if (link->ant.rssi_ant) | |
298 | rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8); | |
299 | link->ant.rssi_ant = rssi; | |
300 | } | |
301 | ||
ebcf26da | 302 | static void rt2x00lib_precalculate_link_signal(struct link_qual *qual) |
95ea3627 | 303 | { |
ebcf26da ID |
304 | if (qual->rx_failed || qual->rx_success) |
305 | qual->rx_percentage = | |
306 | (qual->rx_success * 100) / | |
307 | (qual->rx_failed + qual->rx_success); | |
95ea3627 | 308 | else |
ebcf26da | 309 | qual->rx_percentage = 50; |
95ea3627 | 310 | |
ebcf26da ID |
311 | if (qual->tx_failed || qual->tx_success) |
312 | qual->tx_percentage = | |
313 | (qual->tx_success * 100) / | |
314 | (qual->tx_failed + qual->tx_success); | |
95ea3627 | 315 | else |
ebcf26da | 316 | qual->tx_percentage = 50; |
95ea3627 | 317 | |
ebcf26da ID |
318 | qual->rx_success = 0; |
319 | qual->rx_failed = 0; | |
320 | qual->tx_success = 0; | |
321 | qual->tx_failed = 0; | |
95ea3627 ID |
322 | } |
323 | ||
324 | static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, | |
325 | int rssi) | |
326 | { | |
327 | int rssi_percentage = 0; | |
328 | int signal; | |
329 | ||
330 | /* | |
331 | * We need a positive value for the RSSI. | |
332 | */ | |
333 | if (rssi < 0) | |
334 | rssi += rt2x00dev->rssi_offset; | |
335 | ||
336 | /* | |
337 | * Calculate the different percentages, | |
338 | * which will be used for the signal. | |
339 | */ | |
340 | if (rt2x00dev->rssi_offset) | |
341 | rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; | |
342 | ||
343 | /* | |
344 | * Add the individual percentages and use the WEIGHT | |
345 | * defines to calculate the current link signal. | |
346 | */ | |
347 | signal = ((WEIGHT_RSSI * rssi_percentage) + | |
ebcf26da ID |
348 | (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) + |
349 | (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100; | |
95ea3627 ID |
350 | |
351 | return (signal > 100) ? 100 : signal; | |
352 | } | |
353 | ||
354 | static void rt2x00lib_link_tuner(struct work_struct *work) | |
355 | { | |
356 | struct rt2x00_dev *rt2x00dev = | |
357 | container_of(work, struct rt2x00_dev, link.work.work); | |
358 | ||
25ab002f ID |
359 | /* |
360 | * When the radio is shutting down we should | |
361 | * immediately cease all link tuning. | |
362 | */ | |
363 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
364 | return; | |
365 | ||
95ea3627 ID |
366 | /* |
367 | * Update statistics. | |
368 | */ | |
ebcf26da | 369 | rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual); |
95ea3627 | 370 | rt2x00dev->low_level_stats.dot11FCSErrorCount += |
ebcf26da | 371 | rt2x00dev->link.qual.rx_failed; |
95ea3627 | 372 | |
95ea3627 ID |
373 | /* |
374 | * Only perform the link tuning when Link tuning | |
375 | * has been enabled (This could have been disabled from the EEPROM). | |
376 | */ | |
377 | if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) | |
378 | rt2x00dev->ops->lib->link_tuner(rt2x00dev); | |
379 | ||
725d99d4 ID |
380 | /* |
381 | * Precalculate a portion of the link signal which is | |
382 | * in based on the tx/rx success/failure counters. | |
383 | */ | |
ebcf26da | 384 | rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual); |
725d99d4 | 385 | |
a9450b70 ID |
386 | /* |
387 | * Send a signal to the led to update the led signal strength. | |
388 | */ | |
389 | rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi); | |
390 | ||
53b3f8e4 ID |
391 | /* |
392 | * Evaluate antenna setup, make this the last step since this could | |
393 | * possibly reset some statistics. | |
394 | */ | |
395 | rt2x00lib_evaluate_antenna(rt2x00dev); | |
396 | ||
95ea3627 ID |
397 | /* |
398 | * Increase tuner counter, and reschedule the next link tuner run. | |
399 | */ | |
400 | rt2x00dev->link.count++; | |
401 | queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, | |
402 | LINK_TUNE_INTERVAL); | |
403 | } | |
404 | ||
4150c572 JB |
405 | static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) |
406 | { | |
407 | struct rt2x00_dev *rt2x00dev = | |
408 | container_of(work, struct rt2x00_dev, filter_work); | |
5886d0db | 409 | |
133adf08 | 410 | rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter); |
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); | |
171afcd4 ID |
438 | if (skb && rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, |
439 | skb, &control)) | |
6bb40dd1 | 440 | dev_kfree_skb(skb); |
6bb40dd1 ID |
441 | } |
442 | ||
72810379 ID |
443 | if (delayed_flags & DELAYED_CONFIG_ERP) |
444 | rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf); | |
a2e1d52a ID |
445 | |
446 | if (delayed_flags & DELAYED_LED_ASSOC) | |
447 | rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); | |
6bb40dd1 | 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 | ||
633257d3 ID |
486 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
487 | rt2x00lib_beacondone_iter, | |
488 | rt2x00dev); | |
6bb40dd1 ID |
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 | 497 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
baf26a7e | 498 | struct skb_frame_desc *skbdesc; |
181d6902 ID |
499 | struct ieee80211_tx_status tx_status; |
500 | int success = !!(txdesc->status == TX_SUCCESS || | |
501 | txdesc->status == TX_SUCCESS_RETRY); | |
502 | int fail = !!(txdesc->status == TX_FAIL_RETRY || | |
503 | txdesc->status == TX_FAIL_INVALID || | |
504 | txdesc->status == TX_FAIL_OTHER); | |
95ea3627 ID |
505 | |
506 | /* | |
507 | * Update TX statistics. | |
508 | */ | |
ebcf26da | 509 | rt2x00dev->link.qual.tx_success += success; |
2088d417 | 510 | rt2x00dev->link.qual.tx_failed += fail; |
95ea3627 | 511 | |
181d6902 ID |
512 | /* |
513 | * Initialize TX status | |
514 | */ | |
515 | tx_status.flags = 0; | |
516 | tx_status.ack_signal = 0; | |
517 | tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY); | |
518 | tx_status.retry_count = txdesc->retry; | |
95db4d4d | 519 | memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control)); |
181d6902 ID |
520 | |
521 | if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) { | |
95ea3627 | 522 | if (success) |
181d6902 | 523 | tx_status.flags |= IEEE80211_TX_STATUS_ACK; |
95ea3627 | 524 | else |
181d6902 | 525 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
526 | } |
527 | ||
181d6902 ID |
528 | tx_status.queue_length = entry->queue->limit; |
529 | tx_status.queue_number = tx_status.control.queue; | |
95ea3627 | 530 | |
181d6902 | 531 | if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { |
95ea3627 | 532 | if (success) |
181d6902 | 533 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
95ea3627 | 534 | else |
181d6902 | 535 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
536 | } |
537 | ||
538 | /* | |
baf26a7e ID |
539 | * Send the tx_status to debugfs. Only send the status report |
540 | * to mac80211 when the frame originated from there. If this was | |
541 | * a extra frame coming through a mac80211 library call (RTS/CTS) | |
542 | * then we should not send the status report back. | |
543 | * If send to mac80211, mac80211 will clean up the skb structure, | |
544 | * otherwise we have to do it ourself. | |
95ea3627 | 545 | */ |
baf26a7e ID |
546 | skbdesc = get_skb_frame_desc(entry->skb); |
547 | skbdesc->frame_type = DUMP_FRAME_TXDONE; | |
548 | ||
4d8dd66c | 549 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); |
baf26a7e ID |
550 | |
551 | if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED)) | |
552 | ieee80211_tx_status_irqsafe(rt2x00dev->hw, | |
553 | entry->skb, &tx_status); | |
554 | else | |
555 | dev_kfree_skb(entry->skb); | |
95ea3627 ID |
556 | entry->skb = NULL; |
557 | } | |
558 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
559 | ||
181d6902 ID |
560 | void rt2x00lib_rxdone(struct queue_entry *entry, |
561 | struct rxdone_entry_desc *rxdesc) | |
95ea3627 | 562 | { |
181d6902 | 563 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
95ea3627 | 564 | struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; |
8318d78a | 565 | struct ieee80211_supported_band *sband; |
61af43c5 | 566 | struct ieee80211_hdr *hdr; |
70e2fed4 | 567 | const struct rt2x00_rate *rate; |
95ea3627 | 568 | unsigned int i; |
70e2fed4 | 569 | int idx = -1; |
61af43c5 | 570 | u16 fc; |
95ea3627 ID |
571 | |
572 | /* | |
573 | * Update RX statistics. | |
574 | */ | |
8318d78a JB |
575 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; |
576 | for (i = 0; i < sband->n_bitrates; i++) { | |
70e2fed4 | 577 | rate = rt2x00_get_rate(sband->bitrates[i].hw_value); |
95ea3627 | 578 | |
19d30e02 ID |
579 | if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) && |
580 | (rate->plcp == rxdesc->signal)) || | |
581 | (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) && | |
582 | (rate->bitrate == rxdesc->signal))) { | |
8318d78a | 583 | idx = i; |
95ea3627 ID |
584 | break; |
585 | } | |
586 | } | |
587 | ||
866a0503 ID |
588 | if (idx < 0) { |
589 | WARNING(rt2x00dev, "Frame received with unrecognized signal," | |
590 | "signal=0x%.2x, plcp=%d.\n", rxdesc->signal, | |
591 | !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP)); | |
592 | idx = 0; | |
593 | } | |
594 | ||
61af43c5 | 595 | /* |
7e56d38d | 596 | * Only update link status if this is a beacon frame carrying our bssid. |
61af43c5 | 597 | */ |
70e2fed4 | 598 | hdr = (struct ieee80211_hdr *)entry->skb->data; |
7e56d38d | 599 | fc = le16_to_cpu(hdr->frame_control); |
19d30e02 | 600 | if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS)) |
181d6902 | 601 | rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi); |
61af43c5 | 602 | |
ebcf26da | 603 | rt2x00dev->link.qual.rx_success++; |
69f81a2c | 604 | |
8318d78a | 605 | rx_status->rate_idx = idx; |
4150c572 | 606 | rx_status->signal = |
181d6902 ID |
607 | rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi); |
608 | rx_status->ssi = rxdesc->rssi; | |
609 | rx_status->flag = rxdesc->flags; | |
69f81a2c | 610 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 ID |
611 | |
612 | /* | |
181d6902 ID |
613 | * Send frame to mac80211 & debugfs. |
614 | * mac80211 will clean up the skb structure. | |
95ea3627 | 615 | */ |
181d6902 ID |
616 | get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE; |
617 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); | |
618 | ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status); | |
619 | entry->skb = NULL; | |
95ea3627 ID |
620 | } |
621 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
622 | ||
623 | /* | |
624 | * TX descriptor initializer | |
625 | */ | |
626 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
08992f7f | 627 | struct sk_buff *skb, |
95ea3627 ID |
628 | struct ieee80211_tx_control *control) |
629 | { | |
181d6902 ID |
630 | struct txentry_desc txdesc; |
631 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); | |
3976ae6c | 632 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data; |
70e2fed4 | 633 | const struct rt2x00_rate *rate; |
95ea3627 | 634 | int tx_rate; |
08992f7f | 635 | int length; |
95ea3627 ID |
636 | int duration; |
637 | int residual; | |
638 | u16 frame_control; | |
639 | u16 seq_ctrl; | |
640 | ||
181d6902 | 641 | memset(&txdesc, 0, sizeof(txdesc)); |
95ea3627 | 642 | |
091ed315 | 643 | txdesc.queue = skbdesc->entry->queue->qid; |
181d6902 ID |
644 | txdesc.cw_min = skbdesc->entry->queue->cw_min; |
645 | txdesc.cw_max = skbdesc->entry->queue->cw_max; | |
646 | txdesc.aifs = skbdesc->entry->queue->aifs; | |
95ea3627 | 647 | |
95ea3627 ID |
648 | /* |
649 | * Read required fields from ieee80211 header. | |
650 | */ | |
70e2fed4 ID |
651 | frame_control = le16_to_cpu(hdr->frame_control); |
652 | seq_ctrl = le16_to_cpu(hdr->seq_ctrl); | |
95ea3627 | 653 | |
8318d78a | 654 | tx_rate = control->tx_rate->hw_value; |
95ea3627 | 655 | |
2700f8b0 MN |
656 | /* |
657 | * Check whether this frame is to be acked | |
658 | */ | |
659 | if (!(control->flags & IEEE80211_TXCTL_NO_ACK)) | |
181d6902 | 660 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); |
2700f8b0 | 661 | |
95ea3627 ID |
662 | /* |
663 | * Check if this is a RTS/CTS frame | |
664 | */ | |
665 | if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { | |
181d6902 | 666 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
2700f8b0 | 667 | if (is_rts_frame(frame_control)) { |
181d6902 ID |
668 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags); |
669 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); | |
2700f8b0 | 670 | } else |
181d6902 | 671 | __clear_bit(ENTRY_TXD_ACK, &txdesc.flags); |
95ea3627 | 672 | if (control->rts_cts_rate) |
8318d78a | 673 | tx_rate = control->rts_cts_rate->hw_value; |
95ea3627 ID |
674 | } |
675 | ||
70e2fed4 | 676 | rate = rt2x00_get_rate(tx_rate); |
95ea3627 ID |
677 | |
678 | /* | |
679 | * Check if more fragments are pending | |
680 | */ | |
70e2fed4 | 681 | if (ieee80211_get_morefrag(hdr)) { |
181d6902 ID |
682 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
683 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags); | |
95ea3627 ID |
684 | } |
685 | ||
686 | /* | |
687 | * Beacons and probe responses require the tsf timestamp | |
688 | * to be inserted into the frame. | |
689 | */ | |
5957da4c | 690 | if (control->queue == RT2X00_BCN_QUEUE_BEACON || |
95ea3627 | 691 | is_probe_resp(frame_control)) |
181d6902 | 692 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags); |
95ea3627 ID |
693 | |
694 | /* | |
695 | * Determine with what IFS priority this frame should be send. | |
696 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
697 | * or this fragment came after RTS/CTS. | |
698 | */ | |
699 | if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || | |
181d6902 ID |
700 | test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags)) |
701 | txdesc.ifs = IFS_SIFS; | |
95ea3627 | 702 | else |
181d6902 | 703 | txdesc.ifs = IFS_BACKOFF; |
95ea3627 ID |
704 | |
705 | /* | |
706 | * PLCP setup | |
707 | * Length calculation depends on OFDM/CCK rate. | |
708 | */ | |
70e2fed4 | 709 | txdesc.signal = rate->plcp; |
181d6902 | 710 | txdesc.service = 0x04; |
95ea3627 | 711 | |
3976ae6c | 712 | length = skbdesc->data_len + FCS_LEN; |
70e2fed4 ID |
713 | if (rate->flags & DEV_RATE_OFDM) { |
714 | __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags); | |
715 | ||
181d6902 ID |
716 | txdesc.length_high = (length >> 6) & 0x3f; |
717 | txdesc.length_low = length & 0x3f; | |
95ea3627 | 718 | } else { |
95ea3627 ID |
719 | /* |
720 | * Convert length to microseconds. | |
721 | */ | |
70e2fed4 ID |
722 | residual = get_duration_res(length, rate->bitrate); |
723 | duration = get_duration(length, rate->bitrate); | |
95ea3627 ID |
724 | |
725 | if (residual != 0) { | |
726 | duration++; | |
727 | ||
728 | /* | |
729 | * Check if we need to set the Length Extension | |
730 | */ | |
70e2fed4 | 731 | if (rate->bitrate == 110 && residual <= 30) |
181d6902 | 732 | txdesc.service |= 0x80; |
95ea3627 ID |
733 | } |
734 | ||
181d6902 ID |
735 | txdesc.length_high = (duration >> 8) & 0xff; |
736 | txdesc.length_low = duration & 0xff; | |
95ea3627 ID |
737 | |
738 | /* | |
739 | * When preamble is enabled we should set the | |
740 | * preamble bit for the signal. | |
741 | */ | |
70e2fed4 | 742 | if (rt2x00_get_rate_preamble(tx_rate)) |
181d6902 | 743 | txdesc.signal |= 0x08; |
95ea3627 ID |
744 | } |
745 | ||
181d6902 | 746 | rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control); |
08992f7f ID |
747 | |
748 | /* | |
181d6902 | 749 | * Update queue entry. |
08992f7f ID |
750 | */ |
751 | skbdesc->entry->skb = skb; | |
4d8dd66c ID |
752 | |
753 | /* | |
754 | * The frame has been completely initialized and ready | |
755 | * for sending to the device. The caller will push the | |
756 | * frame to the device, but we are going to push the | |
757 | * frame to debugfs here. | |
758 | */ | |
759 | skbdesc->frame_type = DUMP_FRAME_TX; | |
760 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
761 | } |
762 | EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); | |
763 | ||
764 | /* | |
765 | * Driver initialization handlers. | |
766 | */ | |
70e2fed4 ID |
767 | const struct rt2x00_rate rt2x00_supported_rates[12] = { |
768 | { | |
aa776721 | 769 | .flags = DEV_RATE_CCK | DEV_RATE_BASIC, |
70e2fed4 | 770 | .bitrate = 10, |
aa776721 | 771 | .ratemask = BIT(0), |
70e2fed4 ID |
772 | .plcp = 0x00, |
773 | }, | |
774 | { | |
aa776721 | 775 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC, |
70e2fed4 | 776 | .bitrate = 20, |
aa776721 | 777 | .ratemask = BIT(1), |
70e2fed4 ID |
778 | .plcp = 0x01, |
779 | }, | |
780 | { | |
aa776721 | 781 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC, |
70e2fed4 | 782 | .bitrate = 55, |
aa776721 | 783 | .ratemask = BIT(2), |
70e2fed4 ID |
784 | .plcp = 0x02, |
785 | }, | |
786 | { | |
aa776721 | 787 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC, |
70e2fed4 | 788 | .bitrate = 110, |
aa776721 | 789 | .ratemask = BIT(3), |
70e2fed4 ID |
790 | .plcp = 0x03, |
791 | }, | |
792 | { | |
aa776721 | 793 | .flags = DEV_RATE_OFDM | DEV_RATE_BASIC, |
70e2fed4 | 794 | .bitrate = 60, |
aa776721 | 795 | .ratemask = BIT(4), |
70e2fed4 ID |
796 | .plcp = 0x0b, |
797 | }, | |
798 | { | |
799 | .flags = DEV_RATE_OFDM, | |
800 | .bitrate = 90, | |
aa776721 | 801 | .ratemask = BIT(5), |
70e2fed4 ID |
802 | .plcp = 0x0f, |
803 | }, | |
804 | { | |
aa776721 | 805 | .flags = DEV_RATE_OFDM | DEV_RATE_BASIC, |
70e2fed4 | 806 | .bitrate = 120, |
aa776721 | 807 | .ratemask = BIT(6), |
70e2fed4 ID |
808 | .plcp = 0x0a, |
809 | }, | |
810 | { | |
811 | .flags = DEV_RATE_OFDM, | |
812 | .bitrate = 180, | |
aa776721 | 813 | .ratemask = BIT(7), |
70e2fed4 ID |
814 | .plcp = 0x0e, |
815 | }, | |
816 | { | |
aa776721 | 817 | .flags = DEV_RATE_OFDM | DEV_RATE_BASIC, |
70e2fed4 | 818 | .bitrate = 240, |
aa776721 | 819 | .ratemask = BIT(8), |
70e2fed4 ID |
820 | .plcp = 0x09, |
821 | }, | |
822 | { | |
823 | .flags = DEV_RATE_OFDM, | |
824 | .bitrate = 360, | |
aa776721 | 825 | .ratemask = BIT(9), |
70e2fed4 ID |
826 | .plcp = 0x0d, |
827 | }, | |
828 | { | |
829 | .flags = DEV_RATE_OFDM, | |
830 | .bitrate = 480, | |
aa776721 | 831 | .ratemask = BIT(10), |
70e2fed4 ID |
832 | .plcp = 0x08, |
833 | }, | |
834 | { | |
835 | .flags = DEV_RATE_OFDM, | |
836 | .bitrate = 540, | |
aa776721 | 837 | .ratemask = BIT(11), |
70e2fed4 ID |
838 | .plcp = 0x0c, |
839 | }, | |
840 | }; | |
841 | ||
95ea3627 ID |
842 | static void rt2x00lib_channel(struct ieee80211_channel *entry, |
843 | const int channel, const int tx_power, | |
844 | const int value) | |
845 | { | |
f2a3c7f5 | 846 | entry->center_freq = ieee80211_channel_to_frequency(channel); |
8318d78a JB |
847 | entry->hw_value = value; |
848 | entry->max_power = tx_power; | |
849 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
850 | } |
851 | ||
852 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
70e2fed4 | 853 | const u16 index, const struct rt2x00_rate *rate) |
95ea3627 | 854 | { |
70e2fed4 ID |
855 | entry->flags = 0; |
856 | entry->bitrate = rate->bitrate; | |
857 | entry->hw_value = rt2x00_create_rate_hw_value(index, 0); | |
8318d78a | 858 | entry->hw_value_short = entry->hw_value; |
70e2fed4 ID |
859 | |
860 | if (rate->flags & DEV_RATE_SHORT_PREAMBLE) { | |
861 | entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE; | |
862 | entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1); | |
863 | } | |
95ea3627 ID |
864 | } |
865 | ||
866 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
867 | struct hw_mode_spec *spec) | |
868 | { | |
869 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
95ea3627 ID |
870 | struct ieee80211_channel *channels; |
871 | struct ieee80211_rate *rates; | |
31562e80 | 872 | unsigned int num_rates; |
95ea3627 ID |
873 | unsigned int i; |
874 | unsigned char tx_power; | |
875 | ||
31562e80 ID |
876 | num_rates = 0; |
877 | if (spec->supported_rates & SUPPORT_RATE_CCK) | |
878 | num_rates += 4; | |
879 | if (spec->supported_rates & SUPPORT_RATE_OFDM) | |
880 | num_rates += 8; | |
95ea3627 ID |
881 | |
882 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
883 | if (!channels) | |
8318d78a | 884 | return -ENOMEM; |
95ea3627 | 885 | |
31562e80 | 886 | rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL); |
95ea3627 ID |
887 | if (!rates) |
888 | goto exit_free_channels; | |
889 | ||
890 | /* | |
891 | * Initialize Rate list. | |
892 | */ | |
31562e80 | 893 | for (i = 0; i < num_rates; i++) |
8f5fa7f0 | 894 | rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i)); |
95ea3627 ID |
895 | |
896 | /* | |
897 | * Initialize Channel list. | |
898 | */ | |
899 | for (i = 0; i < spec->num_channels; i++) { | |
31562e80 ID |
900 | if (spec->channels[i].channel <= 14) { |
901 | if (spec->tx_power_bg) | |
902 | tx_power = spec->tx_power_bg[i]; | |
903 | else | |
904 | tx_power = spec->tx_power_default; | |
905 | } else { | |
906 | if (spec->tx_power_a) | |
907 | tx_power = spec->tx_power_a[i]; | |
908 | else | |
909 | tx_power = spec->tx_power_default; | |
910 | } | |
95ea3627 ID |
911 | |
912 | rt2x00lib_channel(&channels[i], | |
913 | spec->channels[i].channel, tx_power, i); | |
914 | } | |
915 | ||
916 | /* | |
31562e80 | 917 | * Intitialize 802.11b, 802.11g |
95ea3627 | 918 | * Rates: CCK, OFDM. |
8318d78a | 919 | * Channels: 2.4 GHz |
95ea3627 | 920 | */ |
47ac2683 | 921 | if (spec->supported_bands & SUPPORT_BAND_2GHZ) { |
31562e80 ID |
922 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14; |
923 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates; | |
924 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels; | |
925 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
926 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = | |
927 | &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
95ea3627 ID |
928 | } |
929 | ||
930 | /* | |
931 | * Intitialize 802.11a | |
932 | * Rates: OFDM. | |
933 | * Channels: OFDM, UNII, HiperLAN2. | |
934 | */ | |
47ac2683 | 935 | if (spec->supported_bands & SUPPORT_BAND_5GHZ) { |
31562e80 ID |
936 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels = |
937 | spec->num_channels - 14; | |
938 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates = | |
939 | num_rates - 4; | |
940 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
941 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
942 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = | |
943 | &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
95ea3627 ID |
944 | } |
945 | ||
95ea3627 ID |
946 | return 0; |
947 | ||
8318d78a | 948 | exit_free_channels: |
95ea3627 | 949 | kfree(channels); |
95ea3627 ID |
950 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
951 | return -ENOMEM; | |
952 | } | |
953 | ||
954 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
955 | { | |
066cb637 | 956 | if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
957 | ieee80211_unregister_hw(rt2x00dev->hw); |
958 | ||
8318d78a JB |
959 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
960 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
961 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
962 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
963 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 ID |
964 | } |
965 | } | |
966 | ||
967 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
968 | { | |
969 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
970 | int status; | |
971 | ||
972 | /* | |
973 | * Initialize HW modes. | |
974 | */ | |
975 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
976 | if (status) | |
977 | return status; | |
978 | ||
979 | /* | |
980 | * Register HW. | |
981 | */ | |
982 | status = ieee80211_register_hw(rt2x00dev->hw); | |
983 | if (status) { | |
984 | rt2x00lib_remove_hw(rt2x00dev); | |
985 | return status; | |
986 | } | |
987 | ||
066cb637 | 988 | __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
989 | |
990 | return 0; | |
991 | } | |
992 | ||
993 | /* | |
994 | * Initialization/uninitialization handlers. | |
995 | */ | |
e37ea213 | 996 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
997 | { |
998 | if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
999 | return; | |
1000 | ||
1001 | /* | |
1682fe6d | 1002 | * Unregister extra components. |
95ea3627 ID |
1003 | */ |
1004 | rt2x00rfkill_unregister(rt2x00dev); | |
1005 | ||
1006 | /* | |
1007 | * Allow the HW to uninitialize. | |
1008 | */ | |
1009 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
1010 | ||
1011 | /* | |
181d6902 | 1012 | * Free allocated queue entries. |
95ea3627 | 1013 | */ |
181d6902 | 1014 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
1015 | } |
1016 | ||
e37ea213 | 1017 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1018 | { |
1019 | int status; | |
1020 | ||
1021 | if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1022 | return 0; | |
1023 | ||
1024 | /* | |
181d6902 | 1025 | * Allocate all queue entries. |
95ea3627 | 1026 | */ |
181d6902 ID |
1027 | status = rt2x00queue_initialize(rt2x00dev); |
1028 | if (status) | |
95ea3627 | 1029 | return status; |
95ea3627 ID |
1030 | |
1031 | /* | |
1032 | * Initialize the device. | |
1033 | */ | |
1034 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
ed499983 ID |
1035 | if (status) { |
1036 | rt2x00queue_uninitialize(rt2x00dev); | |
1037 | return status; | |
1038 | } | |
95ea3627 ID |
1039 | |
1040 | __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); | |
1041 | ||
1042 | /* | |
1682fe6d | 1043 | * Register the extra components. |
95ea3627 | 1044 | */ |
1682fe6d | 1045 | rt2x00rfkill_register(rt2x00dev); |
95ea3627 ID |
1046 | |
1047 | return 0; | |
95ea3627 ID |
1048 | } |
1049 | ||
e37ea213 ID |
1050 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1051 | { | |
1052 | int retval; | |
1053 | ||
1054 | if (test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1055 | return 0; | |
1056 | ||
1057 | /* | |
1058 | * If this is the first interface which is added, | |
1059 | * we should load the firmware now. | |
1060 | */ | |
9404ef34 ID |
1061 | retval = rt2x00lib_load_firmware(rt2x00dev); |
1062 | if (retval) | |
1063 | return retval; | |
e37ea213 ID |
1064 | |
1065 | /* | |
1066 | * Initialize the device. | |
1067 | */ | |
1068 | retval = rt2x00lib_initialize(rt2x00dev); | |
1069 | if (retval) | |
1070 | return retval; | |
1071 | ||
1072 | /* | |
1073 | * Enable radio. | |
1074 | */ | |
1075 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1076 | if (retval) { | |
1077 | rt2x00lib_uninitialize(rt2x00dev); | |
1078 | return retval; | |
1079 | } | |
1080 | ||
6bb40dd1 ID |
1081 | rt2x00dev->intf_ap_count = 0; |
1082 | rt2x00dev->intf_sta_count = 0; | |
1083 | rt2x00dev->intf_associated = 0; | |
1084 | ||
e37ea213 ID |
1085 | __set_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1091 | { | |
1092 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1093 | return; | |
1094 | ||
1095 | /* | |
1096 | * Perhaps we can add something smarter here, | |
1097 | * but for now just disabling the radio should do. | |
1098 | */ | |
1099 | rt2x00lib_disable_radio(rt2x00dev); | |
1100 | ||
6bb40dd1 ID |
1101 | rt2x00dev->intf_ap_count = 0; |
1102 | rt2x00dev->intf_sta_count = 0; | |
1103 | rt2x00dev->intf_associated = 0; | |
1104 | ||
e37ea213 ID |
1105 | __clear_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1106 | } | |
1107 | ||
95ea3627 ID |
1108 | /* |
1109 | * driver allocation handlers. | |
1110 | */ | |
95ea3627 ID |
1111 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
1112 | { | |
1113 | int retval = -ENOMEM; | |
1114 | ||
6bb40dd1 ID |
1115 | /* |
1116 | * Make room for rt2x00_intf inside the per-interface | |
1117 | * structure ieee80211_vif. | |
1118 | */ | |
1119 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
1120 | ||
95ea3627 ID |
1121 | /* |
1122 | * Let the driver probe the device to detect the capabilities. | |
1123 | */ | |
1124 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1125 | if (retval) { | |
1126 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1127 | goto exit; | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * Initialize configuration work. | |
1132 | */ | |
6bb40dd1 | 1133 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); |
4150c572 | 1134 | INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); |
95ea3627 ID |
1135 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); |
1136 | ||
95ea3627 | 1137 | /* |
181d6902 | 1138 | * Allocate queue array. |
95ea3627 | 1139 | */ |
181d6902 | 1140 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1141 | if (retval) |
1142 | goto exit; | |
1143 | ||
1144 | /* | |
1145 | * Initialize ieee80211 structure. | |
1146 | */ | |
1147 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1148 | if (retval) { | |
1149 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1150 | goto exit; | |
1151 | } | |
1152 | ||
a9450b70 | 1153 | /* |
1682fe6d | 1154 | * Register extra components. |
a9450b70 ID |
1155 | */ |
1156 | rt2x00leds_register(rt2x00dev); | |
1682fe6d | 1157 | rt2x00rfkill_allocate(rt2x00dev); |
95ea3627 ID |
1158 | rt2x00debug_register(rt2x00dev); |
1159 | ||
066cb637 ID |
1160 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1161 | ||
95ea3627 ID |
1162 | return 0; |
1163 | ||
1164 | exit: | |
1165 | rt2x00lib_remove_dev(rt2x00dev); | |
1166 | ||
1167 | return retval; | |
1168 | } | |
1169 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1170 | ||
1171 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1172 | { | |
066cb637 ID |
1173 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1174 | ||
95ea3627 ID |
1175 | /* |
1176 | * Disable radio. | |
1177 | */ | |
1178 | rt2x00lib_disable_radio(rt2x00dev); | |
1179 | ||
1180 | /* | |
1181 | * Uninitialize device. | |
1182 | */ | |
1183 | rt2x00lib_uninitialize(rt2x00dev); | |
1184 | ||
1185 | /* | |
1682fe6d | 1186 | * Free extra components |
95ea3627 ID |
1187 | */ |
1188 | rt2x00debug_deregister(rt2x00dev); | |
95ea3627 | 1189 | rt2x00rfkill_free(rt2x00dev); |
a9450b70 ID |
1190 | rt2x00leds_unregister(rt2x00dev); |
1191 | ||
95ea3627 ID |
1192 | /* |
1193 | * Free ieee80211_hw memory. | |
1194 | */ | |
1195 | rt2x00lib_remove_hw(rt2x00dev); | |
1196 | ||
1197 | /* | |
1198 | * Free firmware image. | |
1199 | */ | |
1200 | rt2x00lib_free_firmware(rt2x00dev); | |
1201 | ||
1202 | /* | |
181d6902 | 1203 | * Free queue structures. |
95ea3627 | 1204 | */ |
181d6902 | 1205 | rt2x00queue_free(rt2x00dev); |
95ea3627 ID |
1206 | } |
1207 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1208 | ||
1209 | /* | |
1210 | * Device state handlers | |
1211 | */ | |
1212 | #ifdef CONFIG_PM | |
1213 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1214 | { | |
1215 | int retval; | |
1216 | ||
1217 | NOTICE(rt2x00dev, "Going to sleep.\n"); | |
066cb637 ID |
1218 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1219 | ||
1220 | /* | |
1221 | * Only continue if mac80211 has open interfaces. | |
1222 | */ | |
1223 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1224 | goto exit; | |
6d7f9877 | 1225 | __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); |
95ea3627 ID |
1226 | |
1227 | /* | |
1682fe6d | 1228 | * Disable radio. |
95ea3627 | 1229 | */ |
e37ea213 | 1230 | rt2x00lib_stop(rt2x00dev); |
95ea3627 | 1231 | rt2x00lib_uninitialize(rt2x00dev); |
1682fe6d ID |
1232 | |
1233 | /* | |
1234 | * Suspend/disable extra components. | |
1235 | */ | |
a9450b70 | 1236 | rt2x00leds_suspend(rt2x00dev); |
1682fe6d | 1237 | rt2x00rfkill_suspend(rt2x00dev); |
95ea3627 ID |
1238 | rt2x00debug_deregister(rt2x00dev); |
1239 | ||
066cb637 | 1240 | exit: |
95ea3627 | 1241 | /* |
9896322a ID |
1242 | * Set device mode to sleep for power management, |
1243 | * on some hardware this call seems to consistently fail. | |
1244 | * From the specifications it is hard to tell why it fails, | |
1245 | * and if this is a "bad thing". | |
1246 | * Overall it is safe to just ignore the failure and | |
1247 | * continue suspending. The only downside is that the | |
1248 | * device will not be in optimal power save mode, but with | |
1249 | * the radio and the other components already disabled the | |
1250 | * device is as good as disabled. | |
95ea3627 ID |
1251 | */ |
1252 | retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); | |
1253 | if (retval) | |
9896322a ID |
1254 | WARNING(rt2x00dev, "Device failed to enter sleep state, " |
1255 | "continue suspending.\n"); | |
95ea3627 ID |
1256 | |
1257 | return 0; | |
1258 | } | |
1259 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1260 | ||
6bb40dd1 ID |
1261 | static void rt2x00lib_resume_intf(void *data, u8 *mac, |
1262 | struct ieee80211_vif *vif) | |
1263 | { | |
1264 | struct rt2x00_dev *rt2x00dev = data; | |
1265 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
1266 | ||
1267 | spin_lock(&intf->lock); | |
1268 | ||
1269 | rt2x00lib_config_intf(rt2x00dev, intf, | |
1270 | vif->type, intf->mac, intf->bssid); | |
1271 | ||
1272 | ||
1273 | /* | |
1274 | * Master or Ad-hoc mode require a new beacon update. | |
1275 | */ | |
1276 | if (vif->type == IEEE80211_IF_TYPE_AP || | |
1277 | vif->type == IEEE80211_IF_TYPE_IBSS) | |
1278 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
1279 | ||
1280 | spin_unlock(&intf->lock); | |
1281 | } | |
1282 | ||
95ea3627 ID |
1283 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) |
1284 | { | |
95ea3627 ID |
1285 | int retval; |
1286 | ||
1287 | NOTICE(rt2x00dev, "Waking up.\n"); | |
95ea3627 ID |
1288 | |
1289 | /* | |
1682fe6d | 1290 | * Restore/enable extra components. |
95ea3627 ID |
1291 | */ |
1292 | rt2x00debug_register(rt2x00dev); | |
1682fe6d | 1293 | rt2x00rfkill_resume(rt2x00dev); |
a9450b70 | 1294 | rt2x00leds_resume(rt2x00dev); |
95ea3627 | 1295 | |
066cb637 | 1296 | /* |
6d7f9877 | 1297 | * Only continue if mac80211 had open interfaces. |
066cb637 | 1298 | */ |
6d7f9877 | 1299 | if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) |
066cb637 ID |
1300 | return 0; |
1301 | ||
95ea3627 ID |
1302 | /* |
1303 | * Reinitialize device and all active interfaces. | |
1304 | */ | |
e37ea213 | 1305 | retval = rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
1306 | if (retval) |
1307 | goto exit; | |
1308 | ||
1309 | /* | |
1310 | * Reconfigure device. | |
1311 | */ | |
066cb637 ID |
1312 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); |
1313 | if (!rt2x00dev->hw->conf.radio_enabled) | |
1314 | rt2x00lib_disable_radio(rt2x00dev); | |
95ea3627 | 1315 | |
6bb40dd1 ID |
1316 | /* |
1317 | * Iterator over each active interface to | |
1318 | * reconfigure the hardware. | |
1319 | */ | |
1320 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, | |
1321 | rt2x00lib_resume_intf, rt2x00dev); | |
95ea3627 | 1322 | |
e37ea213 ID |
1323 | /* |
1324 | * We are ready again to receive requests from mac80211. | |
1325 | */ | |
1326 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); | |
1327 | ||
066cb637 ID |
1328 | /* |
1329 | * It is possible that during that mac80211 has attempted | |
1330 | * to send frames while we were suspending or resuming. | |
1331 | * In that case we have disabled the TX queue and should | |
1332 | * now enable it again | |
1333 | */ | |
1334 | ieee80211_start_queues(rt2x00dev->hw); | |
1335 | ||
95ea3627 | 1336 | /* |
6bb40dd1 ID |
1337 | * During interface iteration we might have changed the |
1338 | * delayed_flags, time to handles the event by calling | |
1339 | * the work handler directly. | |
95ea3627 | 1340 | */ |
6bb40dd1 | 1341 | rt2x00lib_intf_scheduled(&rt2x00dev->intf_work); |
95ea3627 | 1342 | |
95ea3627 ID |
1343 | return 0; |
1344 | ||
1345 | exit: | |
1346 | rt2x00lib_disable_radio(rt2x00dev); | |
1347 | rt2x00lib_uninitialize(rt2x00dev); | |
1348 | rt2x00debug_deregister(rt2x00dev); | |
1349 | ||
95ea3627 ID |
1350 | return retval; |
1351 | } | |
1352 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1353 | #endif /* CONFIG_PM */ | |
1354 | ||
1355 | /* | |
1356 | * rt2x00lib module information. | |
1357 | */ | |
1358 | MODULE_AUTHOR(DRV_PROJECT); | |
1359 | MODULE_VERSION(DRV_VERSION); | |
1360 | MODULE_DESCRIPTION("rt2x00 library"); | |
1361 | MODULE_LICENSE("GPL"); |