Commit | Line | Data |
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84e3196f | 1 | /* |
9c9a0d14 | 2 | Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
84e3196f 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 link tuning routines. | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | ||
29 | #include "rt2x00.h" | |
30 | #include "rt2x00lib.h" | |
31 | ||
5352ff65 ID |
32 | /* |
33 | * When we lack RSSI information return something less then -80 to | |
34 | * tell the driver to tune the device to maximum sensitivity. | |
35 | */ | |
36 | #define DEFAULT_RSSI -128 | |
37 | ||
66679a65 LE |
38 | /* |
39 | * Helper struct and macro to work with moving/walking averages. | |
5352ff65 ID |
40 | * When adding a value to the average value the following calculation |
41 | * is needed: | |
42 | * | |
43 | * avg_rssi = ((avg_rssi * 7) + rssi) / 8; | |
44 | * | |
45 | * The advantage of this approach is that we only need 1 variable | |
46 | * to store the average in (No need for a count and a total). | |
47 | * But more importantly, normal average values will over time | |
48 | * move less and less towards newly added values this results | |
49 | * that with link tuning, the device can have a very good RSSI | |
50 | * for a few minutes but when the device is moved away from the AP | |
51 | * the average will not decrease fast enough to compensate. | |
52 | * The walking average compensates this and will move towards | |
66679a65 LE |
53 | * the new values correctly allowing a effective link tuning, |
54 | * the speed of the average moving towards other values depends | |
55 | * on the value for the number of samples. The higher the number | |
56 | * of samples, the slower the average will move. | |
57 | * We use two variables to keep track of the average value to | |
58 | * compensate for the rounding errors. This can be a significant | |
59 | * error (>5dBm) if the factor is too low. | |
5352ff65 | 60 | */ |
66679a65 LE |
61 | #define AVG_SAMPLES 8 |
62 | #define AVG_FACTOR 1000 | |
63 | #define MOVING_AVERAGE(__avg, __val) \ | |
64 | ({ \ | |
65 | struct avg_val __new; \ | |
66 | __new.avg_weight = \ | |
67 | (__avg).avg_weight ? \ | |
68 | ((((__avg).avg_weight * ((AVG_SAMPLES) - 1)) + \ | |
69 | ((__val) * (AVG_FACTOR))) / \ | |
027e8fd1 | 70 | (AVG_SAMPLES)) : \ |
66679a65 LE |
71 | ((__val) * (AVG_FACTOR)); \ |
72 | __new.avg = __new.avg_weight / (AVG_FACTOR); \ | |
73 | __new; \ | |
74 | }) | |
5352ff65 | 75 | |
84e3196f ID |
76 | static int rt2x00link_antenna_get_link_rssi(struct rt2x00_dev *rt2x00dev) |
77 | { | |
78 | struct link_ant *ant = &rt2x00dev->link.ant; | |
79 | ||
66679a65 LE |
80 | if (ant->rssi_ant.avg && rt2x00dev->link.qual.rx_success) |
81 | return ant->rssi_ant.avg; | |
84e3196f ID |
82 | return DEFAULT_RSSI; |
83 | } | |
84 | ||
193df183 | 85 | static int rt2x00link_antenna_get_rssi_history(struct rt2x00_dev *rt2x00dev) |
84e3196f ID |
86 | { |
87 | struct link_ant *ant = &rt2x00dev->link.ant; | |
88 | ||
193df183 LE |
89 | if (ant->rssi_history) |
90 | return ant->rssi_history; | |
84e3196f ID |
91 | return DEFAULT_RSSI; |
92 | } | |
84e3196f ID |
93 | |
94 | static void rt2x00link_antenna_update_rssi_history(struct rt2x00_dev *rt2x00dev, | |
84e3196f ID |
95 | int rssi) |
96 | { | |
97 | struct link_ant *ant = &rt2x00dev->link.ant; | |
193df183 | 98 | ant->rssi_history = rssi; |
84e3196f | 99 | } |
84e3196f ID |
100 | |
101 | static void rt2x00link_antenna_reset(struct rt2x00_dev *rt2x00dev) | |
102 | { | |
66679a65 LE |
103 | rt2x00dev->link.ant.rssi_ant.avg = 0; |
104 | rt2x00dev->link.ant.rssi_ant.avg_weight = 0; | |
84e3196f ID |
105 | } |
106 | ||
107 | static void rt2x00lib_antenna_diversity_sample(struct rt2x00_dev *rt2x00dev) | |
108 | { | |
109 | struct link_ant *ant = &rt2x00dev->link.ant; | |
110 | struct antenna_setup new_ant; | |
193df183 LE |
111 | int other_antenna; |
112 | ||
113 | int sample_current = rt2x00link_antenna_get_link_rssi(rt2x00dev); | |
114 | int sample_other = rt2x00link_antenna_get_rssi_history(rt2x00dev); | |
84e3196f ID |
115 | |
116 | memcpy(&new_ant, &ant->active, sizeof(new_ant)); | |
117 | ||
118 | /* | |
119 | * We are done sampling. Now we should evaluate the results. | |
120 | */ | |
121 | ant->flags &= ~ANTENNA_MODE_SAMPLE; | |
122 | ||
123 | /* | |
124 | * During the last period we have sampled the RSSI | |
49513481 | 125 | * from both antennas. It now is time to determine |
84e3196f ID |
126 | * which antenna demonstrated the best performance. |
127 | * When we are already on the antenna with the best | |
193df183 LE |
128 | * performance, just create a good starting point |
129 | * for the history and we are done. | |
84e3196f | 130 | */ |
193df183 LE |
131 | if (sample_current >= sample_other) { |
132 | rt2x00link_antenna_update_rssi_history(rt2x00dev, | |
133 | sample_current); | |
84e3196f | 134 | return; |
193df183 LE |
135 | } |
136 | ||
137 | other_antenna = (ant->active.rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
84e3196f ID |
138 | |
139 | if (ant->flags & ANTENNA_RX_DIVERSITY) | |
193df183 | 140 | new_ant.rx = other_antenna; |
84e3196f ID |
141 | |
142 | if (ant->flags & ANTENNA_TX_DIVERSITY) | |
193df183 | 143 | new_ant.tx = other_antenna; |
84e3196f | 144 | |
eb87eaac | 145 | rt2x00lib_config_antenna(rt2x00dev, new_ant); |
84e3196f ID |
146 | } |
147 | ||
148 | static void rt2x00lib_antenna_diversity_eval(struct rt2x00_dev *rt2x00dev) | |
149 | { | |
150 | struct link_ant *ant = &rt2x00dev->link.ant; | |
151 | struct antenna_setup new_ant; | |
152 | int rssi_curr; | |
153 | int rssi_old; | |
154 | ||
155 | memcpy(&new_ant, &ant->active, sizeof(new_ant)); | |
156 | ||
157 | /* | |
158 | * Get current RSSI value along with the historical value, | |
159 | * after that update the history with the current value. | |
160 | */ | |
161 | rssi_curr = rt2x00link_antenna_get_link_rssi(rt2x00dev); | |
193df183 LE |
162 | rssi_old = rt2x00link_antenna_get_rssi_history(rt2x00dev); |
163 | rt2x00link_antenna_update_rssi_history(rt2x00dev, rssi_curr); | |
84e3196f ID |
164 | |
165 | /* | |
166 | * Legacy driver indicates that we should swap antenna's | |
167 | * when the difference in RSSI is greater that 5. This | |
168 | * also should be done when the RSSI was actually better | |
169 | * then the previous sample. | |
170 | * When the difference exceeds the threshold we should | |
171 | * sample the rssi from the other antenna to make a valid | |
172 | * comparison between the 2 antennas. | |
173 | */ | |
174 | if (abs(rssi_curr - rssi_old) < 5) | |
175 | return; | |
176 | ||
177 | ant->flags |= ANTENNA_MODE_SAMPLE; | |
178 | ||
179 | if (ant->flags & ANTENNA_RX_DIVERSITY) | |
180 | new_ant.rx = (new_ant.rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
181 | ||
182 | if (ant->flags & ANTENNA_TX_DIVERSITY) | |
183 | new_ant.tx = (new_ant.tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
184 | ||
eb87eaac | 185 | rt2x00lib_config_antenna(rt2x00dev, new_ant); |
84e3196f ID |
186 | } |
187 | ||
193df183 | 188 | static bool rt2x00lib_antenna_diversity(struct rt2x00_dev *rt2x00dev) |
84e3196f ID |
189 | { |
190 | struct link_ant *ant = &rt2x00dev->link.ant; | |
191 | ||
192 | /* | |
193 | * Determine if software diversity is enabled for | |
194 | * either the TX or RX antenna (or both). | |
84e3196f | 195 | */ |
84e3196f ID |
196 | if (!(ant->flags & ANTENNA_RX_DIVERSITY) && |
197 | !(ant->flags & ANTENNA_TX_DIVERSITY)) { | |
198 | ant->flags = 0; | |
193df183 | 199 | return true; |
84e3196f ID |
200 | } |
201 | ||
202 | /* | |
203 | * If we have only sampled the data over the last period | |
204 | * we should now harvest the data. Otherwise just evaluate | |
205 | * the data. The latter should only be performed once | |
206 | * every 2 seconds. | |
207 | */ | |
193df183 | 208 | if (ant->flags & ANTENNA_MODE_SAMPLE) { |
84e3196f | 209 | rt2x00lib_antenna_diversity_sample(rt2x00dev); |
193df183 LE |
210 | return true; |
211 | } else if (rt2x00dev->link.count & 1) { | |
84e3196f | 212 | rt2x00lib_antenna_diversity_eval(rt2x00dev); |
193df183 LE |
213 | return true; |
214 | } | |
215 | ||
216 | return false; | |
84e3196f ID |
217 | } |
218 | ||
219 | void rt2x00link_update_stats(struct rt2x00_dev *rt2x00dev, | |
220 | struct sk_buff *skb, | |
221 | struct rxdone_entry_desc *rxdesc) | |
222 | { | |
5352ff65 | 223 | struct link *link = &rt2x00dev->link; |
84e3196f ID |
224 | struct link_qual *qual = &rt2x00dev->link.qual; |
225 | struct link_ant *ant = &rt2x00dev->link.ant; | |
226 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
84e3196f | 227 | |
a23c2208 HS |
228 | /* |
229 | * No need to update the stats for !=STA interfaces | |
230 | */ | |
231 | if (!rt2x00dev->intf_sta_count) | |
232 | return; | |
233 | ||
84e3196f ID |
234 | /* |
235 | * Frame was received successfully since non-succesfull | |
236 | * frames would have been dropped by the hardware. | |
237 | */ | |
238 | qual->rx_success++; | |
239 | ||
240 | /* | |
241 | * We are only interested in quality statistics from | |
242 | * beacons which came from the BSS which we are | |
243 | * associated with. | |
244 | */ | |
245 | if (!ieee80211_is_beacon(hdr->frame_control) || | |
246 | !(rxdesc->dev_flags & RXDONE_MY_BSS)) | |
247 | return; | |
248 | ||
249 | /* | |
250 | * Update global RSSI | |
251 | */ | |
66679a65 | 252 | link->avg_rssi = MOVING_AVERAGE(link->avg_rssi, rxdesc->rssi); |
84e3196f ID |
253 | |
254 | /* | |
255 | * Update antenna RSSI | |
256 | */ | |
66679a65 | 257 | ant->rssi_ant = MOVING_AVERAGE(ant->rssi_ant, rxdesc->rssi); |
84e3196f ID |
258 | } |
259 | ||
84e3196f ID |
260 | void rt2x00link_start_tuner(struct rt2x00_dev *rt2x00dev) |
261 | { | |
5352ff65 | 262 | struct link *link = &rt2x00dev->link; |
84e3196f ID |
263 | |
264 | /* | |
265 | * Link tuning should only be performed when | |
8654b79f HS |
266 | * an active sta interface exists. AP interfaces |
267 | * don't need link tuning and monitor mode interfaces | |
268 | * should never have to work with link tuners. | |
84e3196f | 269 | */ |
8654b79f | 270 | if (!rt2x00dev->intf_sta_count) |
84e3196f ID |
271 | return; |
272 | ||
d8147f9d ID |
273 | /** |
274 | * While scanning, link tuning is disabled. By default | |
275 | * the most sensitive settings will be used to make sure | |
25985edc | 276 | * that all beacons and probe responses will be received |
d8147f9d ID |
277 | * during the scan. |
278 | */ | |
279 | if (test_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags)) | |
280 | return; | |
281 | ||
84e3196f ID |
282 | rt2x00link_reset_tuner(rt2x00dev, false); |
283 | ||
66f84d65 SC |
284 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
285 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
286 | &link->work, LINK_TUNE_INTERVAL); | |
84e3196f ID |
287 | } |
288 | ||
289 | void rt2x00link_stop_tuner(struct rt2x00_dev *rt2x00dev) | |
290 | { | |
291 | cancel_delayed_work_sync(&rt2x00dev->link.work); | |
292 | } | |
293 | ||
294 | void rt2x00link_reset_tuner(struct rt2x00_dev *rt2x00dev, bool antenna) | |
295 | { | |
5352ff65 | 296 | struct link_qual *qual = &rt2x00dev->link.qual; |
223dcc26 | 297 | u8 vgc_level = qual->vgc_level_reg; |
5352ff65 | 298 | |
84e3196f ID |
299 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
300 | return; | |
301 | ||
302 | /* | |
303 | * Reset link information. | |
304 | * Both the currently active vgc level as well as | |
305 | * the link tuner counter should be reset. Resetting | |
306 | * the counter is important for devices where the | |
307 | * device should only perform link tuning during the | |
308 | * first minute after being enabled. | |
309 | */ | |
310 | rt2x00dev->link.count = 0; | |
5352ff65 | 311 | memset(qual, 0, sizeof(*qual)); |
84e3196f | 312 | |
223dcc26 ID |
313 | /* |
314 | * Restore the VGC level as stored in the registers, | |
315 | * the driver can use this to determine if the register | |
316 | * must be updated during reset or not. | |
317 | */ | |
318 | qual->vgc_level_reg = vgc_level; | |
319 | ||
84e3196f ID |
320 | /* |
321 | * Reset the link tuner. | |
322 | */ | |
5352ff65 | 323 | rt2x00dev->ops->lib->reset_tuner(rt2x00dev, qual); |
84e3196f ID |
324 | |
325 | if (antenna) | |
326 | rt2x00link_antenna_reset(rt2x00dev); | |
327 | } | |
328 | ||
a57e2e84 | 329 | static void rt2x00link_reset_qual(struct rt2x00_dev *rt2x00dev) |
64abd803 ID |
330 | { |
331 | struct link_qual *qual = &rt2x00dev->link.qual; | |
332 | ||
333 | qual->rx_success = 0; | |
334 | qual->rx_failed = 0; | |
335 | qual->tx_success = 0; | |
336 | qual->tx_failed = 0; | |
337 | } | |
338 | ||
84e3196f ID |
339 | static void rt2x00link_tuner(struct work_struct *work) |
340 | { | |
341 | struct rt2x00_dev *rt2x00dev = | |
342 | container_of(work, struct rt2x00_dev, link.work.work); | |
5352ff65 | 343 | struct link *link = &rt2x00dev->link; |
84e3196f ID |
344 | struct link_qual *qual = &rt2x00dev->link.qual; |
345 | ||
346 | /* | |
347 | * When the radio is shutting down we should | |
348 | * immediately cease all link tuning. | |
349 | */ | |
d8147f9d ID |
350 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
351 | test_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags)) | |
84e3196f ID |
352 | return; |
353 | ||
354 | /* | |
355 | * Update statistics. | |
356 | */ | |
357 | rt2x00dev->ops->lib->link_stats(rt2x00dev, qual); | |
358 | rt2x00dev->low_level_stats.dot11FCSErrorCount += qual->rx_failed; | |
359 | ||
5352ff65 ID |
360 | /* |
361 | * Update quality RSSI for link tuning, | |
362 | * when we have received some frames and we managed to | |
363 | * collect the RSSI data we could use this. Otherwise we | |
364 | * must fallback to the default RSSI value. | |
365 | */ | |
66679a65 | 366 | if (!link->avg_rssi.avg || !qual->rx_success) |
5352ff65 ID |
367 | qual->rssi = DEFAULT_RSSI; |
368 | else | |
66679a65 | 369 | qual->rssi = link->avg_rssi.avg; |
5352ff65 | 370 | |
84e3196f | 371 | /* |
27df2a9c ID |
372 | * Check if link tuning is supported by the hardware, some hardware |
373 | * do not support link tuning at all, while other devices can disable | |
374 | * the feature from the EEPROM. | |
84e3196f | 375 | */ |
7dab73b3 | 376 | if (test_bit(CAPABILITY_LINK_TUNING, &rt2x00dev->cap_flags)) |
5352ff65 | 377 | rt2x00dev->ops->lib->link_tuner(rt2x00dev, qual, link->count); |
84e3196f | 378 | |
84e3196f ID |
379 | /* |
380 | * Send a signal to the led to update the led signal strength. | |
381 | */ | |
66679a65 | 382 | rt2x00leds_led_quality(rt2x00dev, qual->rssi); |
84e3196f ID |
383 | |
384 | /* | |
193df183 LE |
385 | * Evaluate antenna setup, make this the last step when |
386 | * rt2x00lib_antenna_diversity made changes the quality | |
387 | * statistics will be reset. | |
64abd803 | 388 | */ |
193df183 LE |
389 | if (rt2x00lib_antenna_diversity(rt2x00dev)) |
390 | rt2x00link_reset_qual(rt2x00dev); | |
64abd803 | 391 | |
84e3196f ID |
392 | /* |
393 | * Increase tuner counter, and reschedule the next link tuner run. | |
394 | */ | |
5352ff65 | 395 | link->count++; |
66f84d65 SC |
396 | |
397 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
398 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
399 | &link->work, LINK_TUNE_INTERVAL); | |
84e3196f ID |
400 | } |
401 | ||
c965c74b ID |
402 | void rt2x00link_start_watchdog(struct rt2x00_dev *rt2x00dev) |
403 | { | |
404 | struct link *link = &rt2x00dev->link; | |
405 | ||
aca7305b HS |
406 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && |
407 | rt2x00dev->ops->lib->watchdog) | |
408 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
409 | &link->watchdog_work, | |
410 | WATCHDOG_INTERVAL); | |
c965c74b ID |
411 | } |
412 | ||
413 | void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev) | |
414 | { | |
415 | cancel_delayed_work_sync(&rt2x00dev->link.watchdog_work); | |
416 | } | |
417 | ||
418 | static void rt2x00link_watchdog(struct work_struct *work) | |
419 | { | |
420 | struct rt2x00_dev *rt2x00dev = | |
421 | container_of(work, struct rt2x00_dev, link.watchdog_work.work); | |
422 | struct link *link = &rt2x00dev->link; | |
423 | ||
424 | /* | |
425 | * When the radio is shutting down we should | |
426 | * immediately cease the watchdog monitoring. | |
427 | */ | |
428 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
429 | return; | |
430 | ||
431 | rt2x00dev->ops->lib->watchdog(rt2x00dev); | |
432 | ||
433 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
0439f536 ID |
434 | ieee80211_queue_delayed_work(rt2x00dev->hw, |
435 | &link->watchdog_work, | |
436 | WATCHDOG_INTERVAL); | |
c965c74b ID |
437 | } |
438 | ||
9e33a355 HS |
439 | void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev) |
440 | { | |
441 | struct link *link = &rt2x00dev->link; | |
442 | ||
443 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && | |
444 | rt2x00dev->ops->lib->gain_calibration) | |
445 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
446 | &link->agc_work, | |
447 | AGC_INTERVAL); | |
448 | } | |
449 | ||
2e9c43dd JL |
450 | void rt2x00link_start_vcocal(struct rt2x00_dev *rt2x00dev) |
451 | { | |
452 | struct link *link = &rt2x00dev->link; | |
453 | ||
454 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && | |
455 | rt2x00dev->ops->lib->vco_calibration) | |
456 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
457 | &link->vco_work, | |
458 | VCO_INTERVAL); | |
459 | } | |
460 | ||
9e33a355 HS |
461 | void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev) |
462 | { | |
463 | cancel_delayed_work_sync(&rt2x00dev->link.agc_work); | |
464 | } | |
465 | ||
2e9c43dd JL |
466 | void rt2x00link_stop_vcocal(struct rt2x00_dev *rt2x00dev) |
467 | { | |
468 | cancel_delayed_work_sync(&rt2x00dev->link.vco_work); | |
469 | } | |
470 | ||
9e33a355 HS |
471 | static void rt2x00link_agc(struct work_struct *work) |
472 | { | |
473 | struct rt2x00_dev *rt2x00dev = | |
474 | container_of(work, struct rt2x00_dev, link.agc_work.work); | |
475 | struct link *link = &rt2x00dev->link; | |
476 | ||
477 | /* | |
478 | * When the radio is shutting down we should | |
479 | * immediately cease the watchdog monitoring. | |
480 | */ | |
481 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
482 | return; | |
483 | ||
484 | rt2x00dev->ops->lib->gain_calibration(rt2x00dev); | |
485 | ||
486 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
487 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
488 | &link->agc_work, | |
489 | AGC_INTERVAL); | |
490 | } | |
491 | ||
2e9c43dd JL |
492 | static void rt2x00link_vcocal(struct work_struct *work) |
493 | { | |
494 | struct rt2x00_dev *rt2x00dev = | |
495 | container_of(work, struct rt2x00_dev, link.vco_work.work); | |
496 | struct link *link = &rt2x00dev->link; | |
497 | ||
498 | /* | |
499 | * When the radio is shutting down we should | |
500 | * immediately cease the VCO calibration. | |
501 | */ | |
502 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
503 | return; | |
504 | ||
505 | rt2x00dev->ops->lib->vco_calibration(rt2x00dev); | |
506 | ||
507 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
508 | ieee80211_queue_delayed_work(rt2x00dev->hw, | |
509 | &link->vco_work, | |
510 | VCO_INTERVAL); | |
511 | } | |
512 | ||
84e3196f ID |
513 | void rt2x00link_register(struct rt2x00_dev *rt2x00dev) |
514 | { | |
9e33a355 | 515 | INIT_DELAYED_WORK(&rt2x00dev->link.agc_work, rt2x00link_agc); |
2e9c43dd JL |
516 | if (test_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags)) |
517 | INIT_DELAYED_WORK(&rt2x00dev->link.vco_work, rt2x00link_vcocal); | |
c965c74b | 518 | INIT_DELAYED_WORK(&rt2x00dev->link.watchdog_work, rt2x00link_watchdog); |
84e3196f ID |
519 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00link_tuner); |
520 | } |