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95ea3627 | 1 | /* |
811aa9ca | 2 | Copyright (C) 2004 - 2008 rt2x00 SourceForge Project |
95ea3627 ID |
3 | <http://rt2x00.serialmonkey.com> |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the | |
17 | Free Software Foundation, Inc., | |
18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | /* | |
22 | Module: rt2x00lib | |
23 | Abstract: rt2x00 generic device routines. | |
24 | */ | |
25 | ||
95ea3627 ID |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | ||
29 | #include "rt2x00.h" | |
30 | #include "rt2x00lib.h" | |
4d8dd66c | 31 | #include "rt2x00dump.h" |
95ea3627 | 32 | |
95ea3627 ID |
33 | /* |
34 | * Link tuning handlers | |
35 | */ | |
53b3f8e4 | 36 | void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev) |
95ea3627 | 37 | { |
53b3f8e4 ID |
38 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) |
39 | return; | |
40 | ||
41 | /* | |
42 | * Reset link information. | |
43 | * Both the currently active vgc level as well as | |
44 | * the link tuner counter should be reset. Resetting | |
45 | * the counter is important for devices where the | |
46 | * device should only perform link tuning during the | |
47 | * first minute after being enabled. | |
48 | */ | |
8de8c516 ID |
49 | rt2x00dev->link.count = 0; |
50 | rt2x00dev->link.vgc_level = 0; | |
51 | ||
53b3f8e4 ID |
52 | /* |
53 | * Reset the link tuner. | |
54 | */ | |
55 | rt2x00dev->ops->lib->reset_tuner(rt2x00dev); | |
56 | } | |
57 | ||
58 | static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev) | |
59 | { | |
60 | /* | |
61 | * Clear all (possibly) pre-existing quality statistics. | |
62 | */ | |
8de8c516 ID |
63 | memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual)); |
64 | ||
65 | /* | |
66 | * The RX and TX percentage should start at 50% | |
67 | * this will assure we will get at least get some | |
68 | * decent value when the link tuner starts. | |
69 | * The value will be dropped and overwritten with | |
70 | * the correct (measured )value anyway during the | |
71 | * first run of the link tuner. | |
72 | */ | |
73 | rt2x00dev->link.qual.rx_percentage = 50; | |
74 | rt2x00dev->link.qual.tx_percentage = 50; | |
95ea3627 | 75 | |
53b3f8e4 | 76 | rt2x00lib_reset_link_tuner(rt2x00dev); |
95ea3627 ID |
77 | |
78 | queue_delayed_work(rt2x00dev->hw->workqueue, | |
79 | &rt2x00dev->link.work, LINK_TUNE_INTERVAL); | |
80 | } | |
81 | ||
82 | static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev) | |
83 | { | |
3e30968e | 84 | cancel_delayed_work_sync(&rt2x00dev->link.work); |
95ea3627 ID |
85 | } |
86 | ||
95ea3627 ID |
87 | /* |
88 | * Radio control handlers. | |
89 | */ | |
90 | int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) | |
91 | { | |
92 | int status; | |
93 | ||
94 | /* | |
95 | * Don't enable the radio twice. | |
96 | * And check if the hardware button has been disabled. | |
97 | */ | |
98 | if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || | |
81873e9c | 99 | test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags)) |
95ea3627 ID |
100 | return 0; |
101 | ||
837e7f24 | 102 | /* |
181d6902 | 103 | * Initialize all data queues. |
837e7f24 | 104 | */ |
181d6902 ID |
105 | rt2x00queue_init_rx(rt2x00dev); |
106 | rt2x00queue_init_tx(rt2x00dev); | |
837e7f24 | 107 | |
95ea3627 ID |
108 | /* |
109 | * Enable radio. | |
110 | */ | |
111 | status = rt2x00dev->ops->lib->set_device_state(rt2x00dev, | |
112 | STATE_RADIO_ON); | |
113 | if (status) | |
114 | return status; | |
115 | ||
116 | __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags); | |
117 | ||
118 | /* | |
119 | * Enable RX. | |
120 | */ | |
5cbf830e | 121 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 ID |
122 | |
123 | /* | |
124 | * Start the TX queues. | |
125 | */ | |
126 | ieee80211_start_queues(rt2x00dev->hw); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
132 | { | |
133 | if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
134 | return; | |
135 | ||
136 | /* | |
4150c572 | 137 | * Stop all scheduled work. |
95ea3627 | 138 | */ |
6bb40dd1 ID |
139 | if (work_pending(&rt2x00dev->intf_work)) |
140 | cancel_work_sync(&rt2x00dev->intf_work); | |
4150c572 JB |
141 | if (work_pending(&rt2x00dev->filter_work)) |
142 | cancel_work_sync(&rt2x00dev->filter_work); | |
95ea3627 ID |
143 | |
144 | /* | |
145 | * Stop the TX queues. | |
146 | */ | |
147 | ieee80211_stop_queues(rt2x00dev->hw); | |
148 | ||
149 | /* | |
150 | * Disable RX. | |
151 | */ | |
5cbf830e | 152 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
153 | |
154 | /* | |
155 | * Disable radio. | |
156 | */ | |
157 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
158 | } | |
159 | ||
5cbf830e | 160 | void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) |
95ea3627 | 161 | { |
95ea3627 ID |
162 | /* |
163 | * When we are disabling the RX, we should also stop the link tuner. | |
164 | */ | |
5cbf830e | 165 | if (state == STATE_RADIO_RX_OFF) |
95ea3627 ID |
166 | rt2x00lib_stop_link_tuner(rt2x00dev); |
167 | ||
168 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); | |
169 | ||
170 | /* | |
171 | * When we are enabling the RX, we should also start the link tuner. | |
172 | */ | |
5cbf830e | 173 | if (state == STATE_RADIO_RX_ON && |
6bb40dd1 | 174 | (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count)) |
95ea3627 ID |
175 | rt2x00lib_start_link_tuner(rt2x00dev); |
176 | } | |
177 | ||
69f81a2c ID |
178 | static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev) |
179 | { | |
180 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
181 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
182 | int sample_a = | |
183 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A); | |
184 | int sample_b = | |
185 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B); | |
186 | ||
187 | /* | |
188 | * We are done sampling. Now we should evaluate the results. | |
189 | */ | |
190 | rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE; | |
191 | ||
192 | /* | |
193 | * During the last period we have sampled the RSSI | |
194 | * from both antenna's. It now is time to determine | |
195 | * which antenna demonstrated the best performance. | |
196 | * When we are already on the antenna with the best | |
197 | * performance, then there really is nothing for us | |
198 | * left to do. | |
199 | */ | |
200 | if (sample_a == sample_b) | |
201 | return; | |
202 | ||
05253c93 ID |
203 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) |
204 | rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c | 205 | |
05253c93 ID |
206 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) |
207 | tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c ID |
208 | |
209 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
210 | } | |
211 | ||
212 | static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev) | |
213 | { | |
214 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
215 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
216 | int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link); | |
217 | int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr); | |
218 | ||
219 | /* | |
220 | * Legacy driver indicates that we should swap antenna's | |
221 | * when the difference in RSSI is greater that 5. This | |
222 | * also should be done when the RSSI was actually better | |
223 | * then the previous sample. | |
224 | * When the difference exceeds the threshold we should | |
225 | * sample the rssi from the other antenna to make a valid | |
226 | * comparison between the 2 antennas. | |
227 | */ | |
b290d433 | 228 | if (abs(rssi_curr - rssi_old) < 5) |
69f81a2c ID |
229 | return; |
230 | ||
231 | rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE; | |
232 | ||
233 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) | |
234 | rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
235 | ||
236 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) | |
237 | tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
238 | ||
239 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
240 | } | |
241 | ||
242 | static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev) | |
243 | { | |
244 | /* | |
245 | * Determine if software diversity is enabled for | |
246 | * either the TX or RX antenna (or both). | |
247 | * Always perform this check since within the link | |
248 | * tuner interval the configuration might have changed. | |
249 | */ | |
250 | rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY; | |
251 | rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY; | |
252 | ||
253 | if (rt2x00dev->hw->conf.antenna_sel_rx == 0 && | |
b290d433 | 254 | rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
255 | rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY; |
256 | if (rt2x00dev->hw->conf.antenna_sel_tx == 0 && | |
b290d433 | 257 | rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
258 | rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY; |
259 | ||
260 | if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) && | |
261 | !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) { | |
05253c93 | 262 | rt2x00dev->link.ant.flags = 0; |
69f81a2c ID |
263 | return; |
264 | } | |
265 | ||
266 | /* | |
267 | * If we have only sampled the data over the last period | |
268 | * we should now harvest the data. Otherwise just evaluate | |
269 | * the data. The latter should only be performed once | |
270 | * every 2 seconds. | |
271 | */ | |
272 | if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE) | |
273 | rt2x00lib_evaluate_antenna_sample(rt2x00dev); | |
274 | else if (rt2x00dev->link.count & 1) | |
275 | rt2x00lib_evaluate_antenna_eval(rt2x00dev); | |
276 | } | |
277 | ||
278 | static void rt2x00lib_update_link_stats(struct link *link, int rssi) | |
279 | { | |
280 | int avg_rssi = rssi; | |
281 | ||
282 | /* | |
283 | * Update global RSSI | |
284 | */ | |
285 | if (link->qual.avg_rssi) | |
286 | avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8); | |
287 | link->qual.avg_rssi = avg_rssi; | |
288 | ||
289 | /* | |
290 | * Update antenna RSSI | |
291 | */ | |
292 | if (link->ant.rssi_ant) | |
293 | rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8); | |
294 | link->ant.rssi_ant = rssi; | |
295 | } | |
296 | ||
ebcf26da | 297 | static void rt2x00lib_precalculate_link_signal(struct link_qual *qual) |
95ea3627 | 298 | { |
ebcf26da ID |
299 | if (qual->rx_failed || qual->rx_success) |
300 | qual->rx_percentage = | |
301 | (qual->rx_success * 100) / | |
302 | (qual->rx_failed + qual->rx_success); | |
95ea3627 | 303 | else |
ebcf26da | 304 | qual->rx_percentage = 50; |
95ea3627 | 305 | |
ebcf26da ID |
306 | if (qual->tx_failed || qual->tx_success) |
307 | qual->tx_percentage = | |
308 | (qual->tx_success * 100) / | |
309 | (qual->tx_failed + qual->tx_success); | |
95ea3627 | 310 | else |
ebcf26da | 311 | qual->tx_percentage = 50; |
95ea3627 | 312 | |
ebcf26da ID |
313 | qual->rx_success = 0; |
314 | qual->rx_failed = 0; | |
315 | qual->tx_success = 0; | |
316 | qual->tx_failed = 0; | |
95ea3627 ID |
317 | } |
318 | ||
319 | static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, | |
320 | int rssi) | |
321 | { | |
322 | int rssi_percentage = 0; | |
323 | int signal; | |
324 | ||
325 | /* | |
326 | * We need a positive value for the RSSI. | |
327 | */ | |
328 | if (rssi < 0) | |
329 | rssi += rt2x00dev->rssi_offset; | |
330 | ||
331 | /* | |
332 | * Calculate the different percentages, | |
333 | * which will be used for the signal. | |
334 | */ | |
335 | if (rt2x00dev->rssi_offset) | |
336 | rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; | |
337 | ||
338 | /* | |
339 | * Add the individual percentages and use the WEIGHT | |
340 | * defines to calculate the current link signal. | |
341 | */ | |
342 | signal = ((WEIGHT_RSSI * rssi_percentage) + | |
ebcf26da ID |
343 | (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) + |
344 | (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100; | |
95ea3627 ID |
345 | |
346 | return (signal > 100) ? 100 : signal; | |
347 | } | |
348 | ||
349 | static void rt2x00lib_link_tuner(struct work_struct *work) | |
350 | { | |
351 | struct rt2x00_dev *rt2x00dev = | |
352 | container_of(work, struct rt2x00_dev, link.work.work); | |
353 | ||
25ab002f ID |
354 | /* |
355 | * When the radio is shutting down we should | |
356 | * immediately cease all link tuning. | |
357 | */ | |
358 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
359 | return; | |
360 | ||
95ea3627 ID |
361 | /* |
362 | * Update statistics. | |
363 | */ | |
ebcf26da | 364 | rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual); |
95ea3627 | 365 | rt2x00dev->low_level_stats.dot11FCSErrorCount += |
ebcf26da | 366 | rt2x00dev->link.qual.rx_failed; |
95ea3627 | 367 | |
95ea3627 ID |
368 | /* |
369 | * Only perform the link tuning when Link tuning | |
370 | * has been enabled (This could have been disabled from the EEPROM). | |
371 | */ | |
372 | if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) | |
373 | rt2x00dev->ops->lib->link_tuner(rt2x00dev); | |
374 | ||
725d99d4 ID |
375 | /* |
376 | * Precalculate a portion of the link signal which is | |
377 | * in based on the tx/rx success/failure counters. | |
378 | */ | |
ebcf26da | 379 | rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual); |
725d99d4 | 380 | |
a9450b70 ID |
381 | /* |
382 | * Send a signal to the led to update the led signal strength. | |
383 | */ | |
384 | rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi); | |
385 | ||
53b3f8e4 ID |
386 | /* |
387 | * Evaluate antenna setup, make this the last step since this could | |
388 | * possibly reset some statistics. | |
389 | */ | |
390 | rt2x00lib_evaluate_antenna(rt2x00dev); | |
391 | ||
95ea3627 ID |
392 | /* |
393 | * Increase tuner counter, and reschedule the next link tuner run. | |
394 | */ | |
395 | rt2x00dev->link.count++; | |
396 | queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, | |
397 | LINK_TUNE_INTERVAL); | |
398 | } | |
399 | ||
4150c572 JB |
400 | static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) |
401 | { | |
402 | struct rt2x00_dev *rt2x00dev = | |
403 | container_of(work, struct rt2x00_dev, filter_work); | |
3c4f2085 | 404 | unsigned int filter = rt2x00dev->packet_filter; |
5886d0db ID |
405 | |
406 | /* | |
6bb40dd1 | 407 | * Since we had stored the filter inside rt2x00dev->packet_filter, |
5886d0db ID |
408 | * we should now clear that field. Otherwise the driver will |
409 | * assume nothing has changed (*total_flags will be compared | |
6bb40dd1 | 410 | * to rt2x00dev->packet_filter to determine if any action is required). |
5886d0db | 411 | */ |
3c4f2085 | 412 | rt2x00dev->packet_filter = 0; |
4150c572 JB |
413 | |
414 | rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw, | |
5886d0db | 415 | filter, &filter, 0, NULL); |
4150c572 JB |
416 | } |
417 | ||
6bb40dd1 ID |
418 | static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, |
419 | struct ieee80211_vif *vif) | |
5c58ee51 | 420 | { |
6bb40dd1 ID |
421 | struct rt2x00_dev *rt2x00dev = data; |
422 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
423 | struct sk_buff *skb; | |
424 | struct ieee80211_tx_control control; | |
425 | struct ieee80211_bss_conf conf; | |
426 | int delayed_flags; | |
427 | ||
428 | /* | |
429 | * Copy all data we need during this action under the protection | |
430 | * of a spinlock. Otherwise race conditions might occur which results | |
431 | * into an invalid configuration. | |
432 | */ | |
433 | spin_lock(&intf->lock); | |
434 | ||
435 | memcpy(&conf, &intf->conf, sizeof(conf)); | |
436 | delayed_flags = intf->delayed_flags; | |
437 | intf->delayed_flags = 0; | |
438 | ||
439 | spin_unlock(&intf->lock); | |
440 | ||
441 | if (delayed_flags & DELAYED_UPDATE_BEACON) { | |
442 | skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control); | |
443 | if (skb) { | |
444 | rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb, | |
445 | &control); | |
446 | dev_kfree_skb(skb); | |
447 | } | |
448 | } | |
449 | ||
450 | if (delayed_flags & DELAYED_CONFIG_PREAMBLE) | |
451 | rt2x00lib_config_preamble(rt2x00dev, intf, | |
452 | intf->conf.use_short_preamble); | |
453 | } | |
5c58ee51 | 454 | |
6bb40dd1 ID |
455 | static void rt2x00lib_intf_scheduled(struct work_struct *work) |
456 | { | |
457 | struct rt2x00_dev *rt2x00dev = | |
458 | container_of(work, struct rt2x00_dev, intf_work); | |
471b3efd JB |
459 | |
460 | /* | |
6bb40dd1 ID |
461 | * Iterate over each interface and perform the |
462 | * requested configurations. | |
471b3efd | 463 | */ |
6bb40dd1 ID |
464 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
465 | rt2x00lib_intf_scheduled_iter, | |
466 | rt2x00dev); | |
5c58ee51 ID |
467 | } |
468 | ||
95ea3627 ID |
469 | /* |
470 | * Interrupt context handlers. | |
471 | */ | |
6bb40dd1 ID |
472 | static void rt2x00lib_beacondone_iter(void *data, u8 *mac, |
473 | struct ieee80211_vif *vif) | |
95ea3627 | 474 | { |
6bb40dd1 | 475 | struct rt2x00_intf *intf = vif_to_intf(vif); |
95ea3627 | 476 | |
6bb40dd1 ID |
477 | if (vif->type != IEEE80211_IF_TYPE_AP && |
478 | vif->type != IEEE80211_IF_TYPE_IBSS) | |
95ea3627 ID |
479 | return; |
480 | ||
6bb40dd1 ID |
481 | spin_lock(&intf->lock); |
482 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
483 | spin_unlock(&intf->lock); | |
95ea3627 ID |
484 | } |
485 | ||
486 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
487 | { | |
488 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
489 | return; | |
490 | ||
6bb40dd1 ID |
491 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
492 | rt2x00lib_beacondone_iter, | |
493 | rt2x00dev); | |
494 | ||
495 | queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work); | |
95ea3627 ID |
496 | } |
497 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
498 | ||
181d6902 ID |
499 | void rt2x00lib_txdone(struct queue_entry *entry, |
500 | struct txdone_entry_desc *txdesc) | |
95ea3627 | 501 | { |
181d6902 ID |
502 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
503 | struct ieee80211_tx_status tx_status; | |
504 | int success = !!(txdesc->status == TX_SUCCESS || | |
505 | txdesc->status == TX_SUCCESS_RETRY); | |
506 | int fail = !!(txdesc->status == TX_FAIL_RETRY || | |
507 | txdesc->status == TX_FAIL_INVALID || | |
508 | txdesc->status == TX_FAIL_OTHER); | |
95ea3627 ID |
509 | |
510 | /* | |
511 | * Update TX statistics. | |
512 | */ | |
ebcf26da | 513 | rt2x00dev->link.qual.tx_success += success; |
181d6902 | 514 | rt2x00dev->link.qual.tx_failed += txdesc->retry + fail; |
95ea3627 | 515 | |
181d6902 ID |
516 | /* |
517 | * Initialize TX status | |
518 | */ | |
519 | tx_status.flags = 0; | |
520 | tx_status.ack_signal = 0; | |
521 | tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY); | |
522 | tx_status.retry_count = txdesc->retry; | |
523 | memcpy(&tx_status.control, txdesc->control, sizeof(txdesc->control)); | |
524 | ||
525 | if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) { | |
95ea3627 | 526 | if (success) |
181d6902 | 527 | tx_status.flags |= IEEE80211_TX_STATUS_ACK; |
95ea3627 | 528 | else |
181d6902 | 529 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
530 | } |
531 | ||
181d6902 ID |
532 | tx_status.queue_length = entry->queue->limit; |
533 | tx_status.queue_number = tx_status.control.queue; | |
95ea3627 | 534 | |
181d6902 | 535 | if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { |
95ea3627 | 536 | if (success) |
181d6902 | 537 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
95ea3627 | 538 | else |
181d6902 | 539 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
540 | } |
541 | ||
542 | /* | |
4d8dd66c ID |
543 | * Send the tx_status to mac80211 & debugfs. |
544 | * mac80211 will clean up the skb structure. | |
95ea3627 | 545 | */ |
181d6902 | 546 | get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_TXDONE; |
4d8dd66c | 547 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); |
181d6902 | 548 | ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, &tx_status); |
95ea3627 ID |
549 | entry->skb = NULL; |
550 | } | |
551 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
552 | ||
181d6902 ID |
553 | void rt2x00lib_rxdone(struct queue_entry *entry, |
554 | struct rxdone_entry_desc *rxdesc) | |
95ea3627 | 555 | { |
181d6902 | 556 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
95ea3627 | 557 | struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; |
8318d78a | 558 | struct ieee80211_supported_band *sband; |
61af43c5 | 559 | struct ieee80211_hdr *hdr; |
70e2fed4 | 560 | const struct rt2x00_rate *rate; |
95ea3627 | 561 | unsigned int i; |
70e2fed4 | 562 | int idx = -1; |
61af43c5 | 563 | u16 fc; |
95ea3627 ID |
564 | |
565 | /* | |
566 | * Update RX statistics. | |
567 | */ | |
8318d78a JB |
568 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; |
569 | for (i = 0; i < sband->n_bitrates; i++) { | |
70e2fed4 | 570 | rate = rt2x00_get_rate(sband->bitrates[i].hw_value); |
95ea3627 ID |
571 | |
572 | /* | |
573 | * When frame was received with an OFDM bitrate, | |
574 | * the signal is the PLCP value. If it was received with | |
70e2fed4 | 575 | * a CCK bitrate the signal is the rate in 100kbit/s. |
95ea3627 | 576 | */ |
70e2fed4 ID |
577 | if ((rxdesc->ofdm && rate->plcp == rxdesc->signal) || |
578 | (!rxdesc->ofdm && rate->bitrate == rxdesc->signal)) { | |
8318d78a | 579 | idx = i; |
95ea3627 ID |
580 | break; |
581 | } | |
582 | } | |
583 | ||
61af43c5 | 584 | /* |
7e56d38d | 585 | * Only update link status if this is a beacon frame carrying our bssid. |
61af43c5 | 586 | */ |
70e2fed4 | 587 | hdr = (struct ieee80211_hdr *)entry->skb->data; |
7e56d38d | 588 | fc = le16_to_cpu(hdr->frame_control); |
181d6902 ID |
589 | if (is_beacon(fc) && rxdesc->my_bss) |
590 | rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi); | |
61af43c5 | 591 | |
ebcf26da | 592 | rt2x00dev->link.qual.rx_success++; |
69f81a2c | 593 | |
8318d78a | 594 | rx_status->rate_idx = idx; |
4150c572 | 595 | rx_status->signal = |
181d6902 ID |
596 | rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi); |
597 | rx_status->ssi = rxdesc->rssi; | |
598 | rx_status->flag = rxdesc->flags; | |
69f81a2c | 599 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 ID |
600 | |
601 | /* | |
181d6902 ID |
602 | * Send frame to mac80211 & debugfs. |
603 | * mac80211 will clean up the skb structure. | |
95ea3627 | 604 | */ |
181d6902 ID |
605 | get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE; |
606 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); | |
607 | ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status); | |
608 | entry->skb = NULL; | |
95ea3627 ID |
609 | } |
610 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
611 | ||
612 | /* | |
613 | * TX descriptor initializer | |
614 | */ | |
615 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
08992f7f | 616 | struct sk_buff *skb, |
95ea3627 ID |
617 | struct ieee80211_tx_control *control) |
618 | { | |
181d6902 ID |
619 | struct txentry_desc txdesc; |
620 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); | |
70e2fed4 ID |
621 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
622 | const struct rt2x00_rate *rate; | |
95ea3627 | 623 | int tx_rate; |
08992f7f | 624 | int length; |
95ea3627 ID |
625 | int duration; |
626 | int residual; | |
627 | u16 frame_control; | |
628 | u16 seq_ctrl; | |
629 | ||
181d6902 | 630 | memset(&txdesc, 0, sizeof(txdesc)); |
95ea3627 | 631 | |
091ed315 | 632 | txdesc.queue = skbdesc->entry->queue->qid; |
181d6902 ID |
633 | txdesc.cw_min = skbdesc->entry->queue->cw_min; |
634 | txdesc.cw_max = skbdesc->entry->queue->cw_max; | |
635 | txdesc.aifs = skbdesc->entry->queue->aifs; | |
95ea3627 | 636 | |
95ea3627 ID |
637 | /* |
638 | * Read required fields from ieee80211 header. | |
639 | */ | |
70e2fed4 ID |
640 | frame_control = le16_to_cpu(hdr->frame_control); |
641 | seq_ctrl = le16_to_cpu(hdr->seq_ctrl); | |
95ea3627 | 642 | |
8318d78a | 643 | tx_rate = control->tx_rate->hw_value; |
95ea3627 | 644 | |
2700f8b0 MN |
645 | /* |
646 | * Check whether this frame is to be acked | |
647 | */ | |
648 | if (!(control->flags & IEEE80211_TXCTL_NO_ACK)) | |
181d6902 | 649 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); |
2700f8b0 | 650 | |
95ea3627 ID |
651 | /* |
652 | * Check if this is a RTS/CTS frame | |
653 | */ | |
654 | if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { | |
181d6902 | 655 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
2700f8b0 | 656 | if (is_rts_frame(frame_control)) { |
181d6902 ID |
657 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags); |
658 | __set_bit(ENTRY_TXD_ACK, &txdesc.flags); | |
2700f8b0 | 659 | } else |
181d6902 | 660 | __clear_bit(ENTRY_TXD_ACK, &txdesc.flags); |
95ea3627 | 661 | if (control->rts_cts_rate) |
8318d78a | 662 | tx_rate = control->rts_cts_rate->hw_value; |
95ea3627 ID |
663 | } |
664 | ||
70e2fed4 | 665 | rate = rt2x00_get_rate(tx_rate); |
95ea3627 ID |
666 | |
667 | /* | |
668 | * Check if more fragments are pending | |
669 | */ | |
70e2fed4 | 670 | if (ieee80211_get_morefrag(hdr)) { |
181d6902 ID |
671 | __set_bit(ENTRY_TXD_BURST, &txdesc.flags); |
672 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags); | |
95ea3627 ID |
673 | } |
674 | ||
675 | /* | |
676 | * Beacons and probe responses require the tsf timestamp | |
677 | * to be inserted into the frame. | |
678 | */ | |
5957da4c | 679 | if (control->queue == RT2X00_BCN_QUEUE_BEACON || |
95ea3627 | 680 | is_probe_resp(frame_control)) |
181d6902 | 681 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags); |
95ea3627 ID |
682 | |
683 | /* | |
684 | * Determine with what IFS priority this frame should be send. | |
685 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
686 | * or this fragment came after RTS/CTS. | |
687 | */ | |
688 | if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || | |
181d6902 ID |
689 | test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags)) |
690 | txdesc.ifs = IFS_SIFS; | |
95ea3627 | 691 | else |
181d6902 | 692 | txdesc.ifs = IFS_BACKOFF; |
95ea3627 ID |
693 | |
694 | /* | |
695 | * PLCP setup | |
696 | * Length calculation depends on OFDM/CCK rate. | |
697 | */ | |
70e2fed4 | 698 | txdesc.signal = rate->plcp; |
181d6902 | 699 | txdesc.service = 0x04; |
95ea3627 | 700 | |
181d6902 | 701 | length = skb->len + FCS_LEN; |
70e2fed4 ID |
702 | if (rate->flags & DEV_RATE_OFDM) { |
703 | __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags); | |
704 | ||
181d6902 ID |
705 | txdesc.length_high = (length >> 6) & 0x3f; |
706 | txdesc.length_low = length & 0x3f; | |
95ea3627 | 707 | } else { |
95ea3627 ID |
708 | /* |
709 | * Convert length to microseconds. | |
710 | */ | |
70e2fed4 ID |
711 | residual = get_duration_res(length, rate->bitrate); |
712 | duration = get_duration(length, rate->bitrate); | |
95ea3627 ID |
713 | |
714 | if (residual != 0) { | |
715 | duration++; | |
716 | ||
717 | /* | |
718 | * Check if we need to set the Length Extension | |
719 | */ | |
70e2fed4 | 720 | if (rate->bitrate == 110 && residual <= 30) |
181d6902 | 721 | txdesc.service |= 0x80; |
95ea3627 ID |
722 | } |
723 | ||
181d6902 ID |
724 | txdesc.length_high = (duration >> 8) & 0xff; |
725 | txdesc.length_low = duration & 0xff; | |
95ea3627 ID |
726 | |
727 | /* | |
728 | * When preamble is enabled we should set the | |
729 | * preamble bit for the signal. | |
730 | */ | |
70e2fed4 | 731 | if (rt2x00_get_rate_preamble(tx_rate)) |
181d6902 | 732 | txdesc.signal |= 0x08; |
95ea3627 ID |
733 | } |
734 | ||
181d6902 | 735 | rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control); |
08992f7f ID |
736 | |
737 | /* | |
181d6902 | 738 | * Update queue entry. |
08992f7f ID |
739 | */ |
740 | skbdesc->entry->skb = skb; | |
4d8dd66c ID |
741 | |
742 | /* | |
743 | * The frame has been completely initialized and ready | |
744 | * for sending to the device. The caller will push the | |
745 | * frame to the device, but we are going to push the | |
746 | * frame to debugfs here. | |
747 | */ | |
748 | skbdesc->frame_type = DUMP_FRAME_TX; | |
749 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
750 | } |
751 | EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); | |
752 | ||
753 | /* | |
754 | * Driver initialization handlers. | |
755 | */ | |
70e2fed4 ID |
756 | const struct rt2x00_rate rt2x00_supported_rates[12] = { |
757 | { | |
758 | .flags = 0, | |
759 | .bitrate = 10, | |
760 | .ratemask = DEV_RATEMASK_1MB, | |
761 | .plcp = 0x00, | |
762 | }, | |
763 | { | |
764 | .flags = DEV_RATE_SHORT_PREAMBLE, | |
765 | .bitrate = 20, | |
766 | .ratemask = DEV_RATEMASK_2MB, | |
767 | .plcp = 0x01, | |
768 | }, | |
769 | { | |
770 | .flags = DEV_RATE_SHORT_PREAMBLE, | |
771 | .bitrate = 55, | |
772 | .ratemask = DEV_RATEMASK_5_5MB, | |
773 | .plcp = 0x02, | |
774 | }, | |
775 | { | |
776 | .flags = DEV_RATE_SHORT_PREAMBLE, | |
777 | .bitrate = 110, | |
778 | .ratemask = DEV_RATEMASK_11MB, | |
779 | .plcp = 0x03, | |
780 | }, | |
781 | { | |
782 | .flags = DEV_RATE_OFDM, | |
783 | .bitrate = 60, | |
784 | .ratemask = DEV_RATEMASK_6MB, | |
785 | .plcp = 0x0b, | |
786 | }, | |
787 | { | |
788 | .flags = DEV_RATE_OFDM, | |
789 | .bitrate = 90, | |
790 | .ratemask = DEV_RATEMASK_9MB, | |
791 | .plcp = 0x0f, | |
792 | }, | |
793 | { | |
794 | .flags = DEV_RATE_OFDM, | |
795 | .bitrate = 120, | |
796 | .ratemask = DEV_RATEMASK_12MB, | |
797 | .plcp = 0x0a, | |
798 | }, | |
799 | { | |
800 | .flags = DEV_RATE_OFDM, | |
801 | .bitrate = 180, | |
802 | .ratemask = DEV_RATEMASK_18MB, | |
803 | .plcp = 0x0e, | |
804 | }, | |
805 | { | |
806 | .flags = DEV_RATE_OFDM, | |
807 | .bitrate = 240, | |
808 | .ratemask = DEV_RATEMASK_24MB, | |
809 | .plcp = 0x09, | |
810 | }, | |
811 | { | |
812 | .flags = DEV_RATE_OFDM, | |
813 | .bitrate = 360, | |
814 | .ratemask = DEV_RATEMASK_36MB, | |
815 | .plcp = 0x0d, | |
816 | }, | |
817 | { | |
818 | .flags = DEV_RATE_OFDM, | |
819 | .bitrate = 480, | |
820 | .ratemask = DEV_RATEMASK_48MB, | |
821 | .plcp = 0x08, | |
822 | }, | |
823 | { | |
824 | .flags = DEV_RATE_OFDM, | |
825 | .bitrate = 540, | |
826 | .ratemask = DEV_RATEMASK_54MB, | |
827 | .plcp = 0x0c, | |
828 | }, | |
829 | }; | |
830 | ||
95ea3627 ID |
831 | static void rt2x00lib_channel(struct ieee80211_channel *entry, |
832 | const int channel, const int tx_power, | |
833 | const int value) | |
834 | { | |
f2a3c7f5 | 835 | entry->center_freq = ieee80211_channel_to_frequency(channel); |
8318d78a JB |
836 | entry->hw_value = value; |
837 | entry->max_power = tx_power; | |
838 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
839 | } |
840 | ||
841 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
70e2fed4 | 842 | const u16 index, const struct rt2x00_rate *rate) |
95ea3627 | 843 | { |
70e2fed4 ID |
844 | entry->flags = 0; |
845 | entry->bitrate = rate->bitrate; | |
846 | entry->hw_value = rt2x00_create_rate_hw_value(index, 0); | |
8318d78a | 847 | entry->hw_value_short = entry->hw_value; |
70e2fed4 ID |
848 | |
849 | if (rate->flags & DEV_RATE_SHORT_PREAMBLE) { | |
850 | entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE; | |
851 | entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1); | |
852 | } | |
95ea3627 ID |
853 | } |
854 | ||
855 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
856 | struct hw_mode_spec *spec) | |
857 | { | |
858 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
8318d78a | 859 | struct ieee80211_supported_band *sbands; |
95ea3627 ID |
860 | struct ieee80211_channel *channels; |
861 | struct ieee80211_rate *rates; | |
862 | unsigned int i; | |
863 | unsigned char tx_power; | |
864 | ||
8318d78a | 865 | sbands = &rt2x00dev->bands[0]; |
95ea3627 ID |
866 | |
867 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
868 | if (!channels) | |
8318d78a | 869 | return -ENOMEM; |
95ea3627 ID |
870 | |
871 | rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL); | |
872 | if (!rates) | |
873 | goto exit_free_channels; | |
874 | ||
875 | /* | |
876 | * Initialize Rate list. | |
877 | */ | |
70e2fed4 | 878 | for (i = 0; i < spec->num_rates; i++) |
8f5fa7f0 | 879 | rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i)); |
95ea3627 ID |
880 | |
881 | /* | |
882 | * Initialize Channel list. | |
883 | */ | |
884 | for (i = 0; i < spec->num_channels; i++) { | |
885 | if (spec->channels[i].channel <= 14) | |
886 | tx_power = spec->tx_power_bg[i]; | |
887 | else if (spec->tx_power_a) | |
888 | tx_power = spec->tx_power_a[i]; | |
889 | else | |
890 | tx_power = spec->tx_power_default; | |
891 | ||
892 | rt2x00lib_channel(&channels[i], | |
893 | spec->channels[i].channel, tx_power, i); | |
894 | } | |
895 | ||
896 | /* | |
897 | * Intitialize 802.11b | |
898 | * Rates: CCK. | |
8318d78a | 899 | * Channels: 2.4 GHz |
95ea3627 | 900 | */ |
f5507ce9 | 901 | if (spec->num_modes > 0) { |
8318d78a JB |
902 | sbands[IEEE80211_BAND_2GHZ].n_channels = 14; |
903 | sbands[IEEE80211_BAND_2GHZ].n_bitrates = 4; | |
904 | sbands[IEEE80211_BAND_2GHZ].channels = channels; | |
905 | sbands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
906 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
95ea3627 ID |
907 | } |
908 | ||
909 | /* | |
910 | * Intitialize 802.11g | |
911 | * Rates: CCK, OFDM. | |
8318d78a | 912 | * Channels: 2.4 GHz |
95ea3627 | 913 | */ |
f5507ce9 | 914 | if (spec->num_modes > 1) { |
8318d78a JB |
915 | sbands[IEEE80211_BAND_2GHZ].n_channels = 14; |
916 | sbands[IEEE80211_BAND_2GHZ].n_bitrates = spec->num_rates; | |
917 | sbands[IEEE80211_BAND_2GHZ].channels = channels; | |
918 | sbands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
919 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
95ea3627 ID |
920 | } |
921 | ||
922 | /* | |
923 | * Intitialize 802.11a | |
924 | * Rates: OFDM. | |
925 | * Channels: OFDM, UNII, HiperLAN2. | |
926 | */ | |
f5507ce9 | 927 | if (spec->num_modes > 2) { |
8318d78a JB |
928 | sbands[IEEE80211_BAND_5GHZ].n_channels = spec->num_channels - 14; |
929 | sbands[IEEE80211_BAND_5GHZ].n_bitrates = spec->num_rates - 4; | |
930 | sbands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
931 | sbands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
932 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
95ea3627 ID |
933 | } |
934 | ||
95ea3627 ID |
935 | return 0; |
936 | ||
8318d78a | 937 | exit_free_channels: |
95ea3627 | 938 | kfree(channels); |
95ea3627 ID |
939 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
940 | return -ENOMEM; | |
941 | } | |
942 | ||
943 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
944 | { | |
066cb637 | 945 | if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
946 | ieee80211_unregister_hw(rt2x00dev->hw); |
947 | ||
8318d78a JB |
948 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
949 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
950 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
951 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
952 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 ID |
953 | } |
954 | } | |
955 | ||
956 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
957 | { | |
958 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
959 | int status; | |
960 | ||
961 | /* | |
962 | * Initialize HW modes. | |
963 | */ | |
964 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
965 | if (status) | |
966 | return status; | |
967 | ||
968 | /* | |
969 | * Register HW. | |
970 | */ | |
971 | status = ieee80211_register_hw(rt2x00dev->hw); | |
972 | if (status) { | |
973 | rt2x00lib_remove_hw(rt2x00dev); | |
974 | return status; | |
975 | } | |
976 | ||
066cb637 | 977 | __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
978 | |
979 | return 0; | |
980 | } | |
981 | ||
982 | /* | |
983 | * Initialization/uninitialization handlers. | |
984 | */ | |
e37ea213 | 985 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
986 | { |
987 | if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
988 | return; | |
989 | ||
990 | /* | |
991 | * Unregister rfkill. | |
992 | */ | |
993 | rt2x00rfkill_unregister(rt2x00dev); | |
994 | ||
995 | /* | |
996 | * Allow the HW to uninitialize. | |
997 | */ | |
998 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
999 | ||
1000 | /* | |
181d6902 | 1001 | * Free allocated queue entries. |
95ea3627 | 1002 | */ |
181d6902 | 1003 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
1004 | } |
1005 | ||
e37ea213 | 1006 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1007 | { |
1008 | int status; | |
1009 | ||
1010 | if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1011 | return 0; | |
1012 | ||
1013 | /* | |
181d6902 | 1014 | * Allocate all queue entries. |
95ea3627 | 1015 | */ |
181d6902 ID |
1016 | status = rt2x00queue_initialize(rt2x00dev); |
1017 | if (status) | |
95ea3627 | 1018 | return status; |
95ea3627 ID |
1019 | |
1020 | /* | |
1021 | * Initialize the device. | |
1022 | */ | |
1023 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
1024 | if (status) | |
1025 | goto exit; | |
1026 | ||
1027 | __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); | |
1028 | ||
1029 | /* | |
1030 | * Register the rfkill handler. | |
1031 | */ | |
1032 | status = rt2x00rfkill_register(rt2x00dev); | |
1033 | if (status) | |
181d6902 | 1034 | goto exit; |
95ea3627 ID |
1035 | |
1036 | return 0; | |
1037 | ||
95ea3627 | 1038 | exit: |
181d6902 | 1039 | rt2x00lib_uninitialize(rt2x00dev); |
95ea3627 ID |
1040 | |
1041 | return status; | |
1042 | } | |
1043 | ||
e37ea213 ID |
1044 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1045 | { | |
1046 | int retval; | |
1047 | ||
1048 | if (test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1049 | return 0; | |
1050 | ||
1051 | /* | |
1052 | * If this is the first interface which is added, | |
1053 | * we should load the firmware now. | |
1054 | */ | |
9404ef34 ID |
1055 | retval = rt2x00lib_load_firmware(rt2x00dev); |
1056 | if (retval) | |
1057 | return retval; | |
e37ea213 ID |
1058 | |
1059 | /* | |
1060 | * Initialize the device. | |
1061 | */ | |
1062 | retval = rt2x00lib_initialize(rt2x00dev); | |
1063 | if (retval) | |
1064 | return retval; | |
1065 | ||
1066 | /* | |
1067 | * Enable radio. | |
1068 | */ | |
1069 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1070 | if (retval) { | |
1071 | rt2x00lib_uninitialize(rt2x00dev); | |
1072 | return retval; | |
1073 | } | |
1074 | ||
6bb40dd1 ID |
1075 | rt2x00dev->intf_ap_count = 0; |
1076 | rt2x00dev->intf_sta_count = 0; | |
1077 | rt2x00dev->intf_associated = 0; | |
1078 | ||
e37ea213 ID |
1079 | __set_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1085 | { | |
1086 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1087 | return; | |
1088 | ||
1089 | /* | |
1090 | * Perhaps we can add something smarter here, | |
1091 | * but for now just disabling the radio should do. | |
1092 | */ | |
1093 | rt2x00lib_disable_radio(rt2x00dev); | |
1094 | ||
6bb40dd1 ID |
1095 | rt2x00dev->intf_ap_count = 0; |
1096 | rt2x00dev->intf_sta_count = 0; | |
1097 | rt2x00dev->intf_associated = 0; | |
1098 | ||
e37ea213 ID |
1099 | __clear_bit(DEVICE_STARTED, &rt2x00dev->flags); |
1100 | } | |
1101 | ||
95ea3627 ID |
1102 | /* |
1103 | * driver allocation handlers. | |
1104 | */ | |
95ea3627 ID |
1105 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
1106 | { | |
1107 | int retval = -ENOMEM; | |
1108 | ||
6bb40dd1 ID |
1109 | /* |
1110 | * Make room for rt2x00_intf inside the per-interface | |
1111 | * structure ieee80211_vif. | |
1112 | */ | |
1113 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
1114 | ||
95ea3627 ID |
1115 | /* |
1116 | * Let the driver probe the device to detect the capabilities. | |
1117 | */ | |
1118 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1119 | if (retval) { | |
1120 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1121 | goto exit; | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Initialize configuration work. | |
1126 | */ | |
6bb40dd1 | 1127 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); |
4150c572 | 1128 | INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); |
95ea3627 ID |
1129 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); |
1130 | ||
95ea3627 | 1131 | /* |
181d6902 | 1132 | * Allocate queue array. |
95ea3627 | 1133 | */ |
181d6902 | 1134 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1135 | if (retval) |
1136 | goto exit; | |
1137 | ||
1138 | /* | |
1139 | * Initialize ieee80211 structure. | |
1140 | */ | |
1141 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1142 | if (retval) { | |
1143 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1144 | goto exit; | |
1145 | } | |
1146 | ||
a9450b70 ID |
1147 | /* |
1148 | * Register LED. | |
1149 | */ | |
1150 | rt2x00leds_register(rt2x00dev); | |
1151 | ||
95ea3627 ID |
1152 | /* |
1153 | * Allocatie rfkill. | |
1154 | */ | |
1155 | retval = rt2x00rfkill_allocate(rt2x00dev); | |
1156 | if (retval) | |
1157 | goto exit; | |
1158 | ||
1159 | /* | |
1160 | * Open the debugfs entry. | |
1161 | */ | |
1162 | rt2x00debug_register(rt2x00dev); | |
1163 | ||
066cb637 ID |
1164 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1165 | ||
95ea3627 ID |
1166 | return 0; |
1167 | ||
1168 | exit: | |
1169 | rt2x00lib_remove_dev(rt2x00dev); | |
1170 | ||
1171 | return retval; | |
1172 | } | |
1173 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1174 | ||
1175 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1176 | { | |
066cb637 ID |
1177 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1178 | ||
95ea3627 ID |
1179 | /* |
1180 | * Disable radio. | |
1181 | */ | |
1182 | rt2x00lib_disable_radio(rt2x00dev); | |
1183 | ||
1184 | /* | |
1185 | * Uninitialize device. | |
1186 | */ | |
1187 | rt2x00lib_uninitialize(rt2x00dev); | |
1188 | ||
1189 | /* | |
1190 | * Close debugfs entry. | |
1191 | */ | |
1192 | rt2x00debug_deregister(rt2x00dev); | |
1193 | ||
1194 | /* | |
1195 | * Free rfkill | |
1196 | */ | |
1197 | rt2x00rfkill_free(rt2x00dev); | |
1198 | ||
a9450b70 ID |
1199 | /* |
1200 | * Free LED. | |
1201 | */ | |
1202 | rt2x00leds_unregister(rt2x00dev); | |
1203 | ||
95ea3627 ID |
1204 | /* |
1205 | * Free ieee80211_hw memory. | |
1206 | */ | |
1207 | rt2x00lib_remove_hw(rt2x00dev); | |
1208 | ||
1209 | /* | |
1210 | * Free firmware image. | |
1211 | */ | |
1212 | rt2x00lib_free_firmware(rt2x00dev); | |
1213 | ||
1214 | /* | |
181d6902 | 1215 | * Free queue structures. |
95ea3627 | 1216 | */ |
181d6902 | 1217 | rt2x00queue_free(rt2x00dev); |
95ea3627 ID |
1218 | } |
1219 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1220 | ||
1221 | /* | |
1222 | * Device state handlers | |
1223 | */ | |
1224 | #ifdef CONFIG_PM | |
1225 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1226 | { | |
1227 | int retval; | |
1228 | ||
1229 | NOTICE(rt2x00dev, "Going to sleep.\n"); | |
066cb637 ID |
1230 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1231 | ||
1232 | /* | |
1233 | * Only continue if mac80211 has open interfaces. | |
1234 | */ | |
1235 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1236 | goto exit; | |
6d7f9877 | 1237 | __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); |
95ea3627 ID |
1238 | |
1239 | /* | |
1240 | * Disable radio and unitialize all items | |
1241 | * that must be recreated on resume. | |
1242 | */ | |
e37ea213 | 1243 | rt2x00lib_stop(rt2x00dev); |
95ea3627 | 1244 | rt2x00lib_uninitialize(rt2x00dev); |
a9450b70 | 1245 | rt2x00leds_suspend(rt2x00dev); |
95ea3627 ID |
1246 | rt2x00debug_deregister(rt2x00dev); |
1247 | ||
066cb637 | 1248 | exit: |
95ea3627 ID |
1249 | /* |
1250 | * Set device mode to sleep for power management. | |
1251 | */ | |
1252 | retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); | |
1253 | if (retval) | |
1254 | return retval; | |
1255 | ||
1256 | return 0; | |
1257 | } | |
1258 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1259 | ||
6bb40dd1 ID |
1260 | static void rt2x00lib_resume_intf(void *data, u8 *mac, |
1261 | struct ieee80211_vif *vif) | |
1262 | { | |
1263 | struct rt2x00_dev *rt2x00dev = data; | |
1264 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
1265 | ||
1266 | spin_lock(&intf->lock); | |
1267 | ||
1268 | rt2x00lib_config_intf(rt2x00dev, intf, | |
1269 | vif->type, intf->mac, intf->bssid); | |
1270 | ||
1271 | ||
1272 | /* | |
1273 | * Master or Ad-hoc mode require a new beacon update. | |
1274 | */ | |
1275 | if (vif->type == IEEE80211_IF_TYPE_AP || | |
1276 | vif->type == IEEE80211_IF_TYPE_IBSS) | |
1277 | intf->delayed_flags |= DELAYED_UPDATE_BEACON; | |
1278 | ||
1279 | spin_unlock(&intf->lock); | |
1280 | } | |
1281 | ||
95ea3627 ID |
1282 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) |
1283 | { | |
95ea3627 ID |
1284 | int retval; |
1285 | ||
1286 | NOTICE(rt2x00dev, "Waking up.\n"); | |
95ea3627 ID |
1287 | |
1288 | /* | |
a9450b70 | 1289 | * Open the debugfs entry and restore led handling. |
95ea3627 ID |
1290 | */ |
1291 | rt2x00debug_register(rt2x00dev); | |
a9450b70 | 1292 | rt2x00leds_resume(rt2x00dev); |
95ea3627 | 1293 | |
066cb637 | 1294 | /* |
6d7f9877 | 1295 | * Only continue if mac80211 had open interfaces. |
066cb637 | 1296 | */ |
6d7f9877 | 1297 | if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) |
066cb637 ID |
1298 | return 0; |
1299 | ||
95ea3627 ID |
1300 | /* |
1301 | * Reinitialize device and all active interfaces. | |
1302 | */ | |
e37ea213 | 1303 | retval = rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
1304 | if (retval) |
1305 | goto exit; | |
1306 | ||
1307 | /* | |
1308 | * Reconfigure device. | |
1309 | */ | |
066cb637 ID |
1310 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); |
1311 | if (!rt2x00dev->hw->conf.radio_enabled) | |
1312 | rt2x00lib_disable_radio(rt2x00dev); | |
95ea3627 | 1313 | |
6bb40dd1 ID |
1314 | /* |
1315 | * Iterator over each active interface to | |
1316 | * reconfigure the hardware. | |
1317 | */ | |
1318 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, | |
1319 | rt2x00lib_resume_intf, rt2x00dev); | |
95ea3627 | 1320 | |
e37ea213 ID |
1321 | /* |
1322 | * We are ready again to receive requests from mac80211. | |
1323 | */ | |
1324 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); | |
1325 | ||
066cb637 ID |
1326 | /* |
1327 | * It is possible that during that mac80211 has attempted | |
1328 | * to send frames while we were suspending or resuming. | |
1329 | * In that case we have disabled the TX queue and should | |
1330 | * now enable it again | |
1331 | */ | |
1332 | ieee80211_start_queues(rt2x00dev->hw); | |
1333 | ||
95ea3627 | 1334 | /* |
6bb40dd1 ID |
1335 | * During interface iteration we might have changed the |
1336 | * delayed_flags, time to handles the event by calling | |
1337 | * the work handler directly. | |
95ea3627 | 1338 | */ |
6bb40dd1 | 1339 | rt2x00lib_intf_scheduled(&rt2x00dev->intf_work); |
95ea3627 | 1340 | |
95ea3627 ID |
1341 | return 0; |
1342 | ||
1343 | exit: | |
1344 | rt2x00lib_disable_radio(rt2x00dev); | |
1345 | rt2x00lib_uninitialize(rt2x00dev); | |
1346 | rt2x00debug_deregister(rt2x00dev); | |
1347 | ||
95ea3627 ID |
1348 | return retval; |
1349 | } | |
1350 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1351 | #endif /* CONFIG_PM */ | |
1352 | ||
1353 | /* | |
1354 | * rt2x00lib module information. | |
1355 | */ | |
1356 | MODULE_AUTHOR(DRV_PROJECT); | |
1357 | MODULE_VERSION(DRV_VERSION); | |
1358 | MODULE_DESCRIPTION("rt2x00 library"); | |
1359 | MODULE_LICENSE("GPL"); |