Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <sound/driver.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/smp_lock.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
1a60d4c5 | 28 | #include <linux/mutex.h> |
1da177e4 | 29 | #include <linux/moduleparam.h> |
543537bd | 30 | #include <linux/string.h> |
1da177e4 LT |
31 | #include <sound/core.h> |
32 | #include <sound/timer.h> | |
33 | #include <sound/control.h> | |
34 | #include <sound/info.h> | |
35 | #include <sound/minors.h> | |
36 | #include <sound/initval.h> | |
37 | #include <linux/kmod.h> | |
1da177e4 LT |
38 | |
39 | #if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE) | |
40 | #define DEFAULT_TIMER_LIMIT 3 | |
41 | #elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE) | |
42 | #define DEFAULT_TIMER_LIMIT 2 | |
43 | #else | |
44 | #define DEFAULT_TIMER_LIMIT 1 | |
45 | #endif | |
46 | ||
47 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
48 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Takashi Iwai <tiwai@suse.de>"); | |
49 | MODULE_DESCRIPTION("ALSA timer interface"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | module_param(timer_limit, int, 0444); | |
52 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
53 | ||
53d2f744 TI |
54 | struct snd_timer_user { |
55 | struct snd_timer_instance *timeri; | |
6b172a85 | 56 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
57 | unsigned long ticks; |
58 | unsigned long overrun; | |
59 | int qhead; | |
60 | int qtail; | |
61 | int qused; | |
62 | int queue_size; | |
53d2f744 TI |
63 | struct snd_timer_read *queue; |
64 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
65 | spinlock_t qlock; |
66 | unsigned long last_resolution; | |
67 | unsigned int filter; | |
68 | struct timespec tstamp; /* trigger tstamp */ | |
69 | wait_queue_head_t qchange_sleep; | |
70 | struct fasync_struct *fasync; | |
1a60d4c5 | 71 | struct mutex tread_sem; |
53d2f744 | 72 | }; |
1da177e4 LT |
73 | |
74 | /* list of timers */ | |
75 | static LIST_HEAD(snd_timer_list); | |
76 | ||
77 | /* list of slave instances */ | |
78 | static LIST_HEAD(snd_timer_slave_list); | |
79 | ||
80 | /* lock for slave active lists */ | |
81 | static DEFINE_SPINLOCK(slave_active_lock); | |
82 | ||
1a60d4c5 | 83 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 84 | |
53d2f744 TI |
85 | static int snd_timer_free(struct snd_timer *timer); |
86 | static int snd_timer_dev_free(struct snd_device *device); | |
87 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 88 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 89 | |
53d2f744 | 90 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
91 | |
92 | /* | |
93 | * create a timer instance with the given owner string. | |
94 | * when timer is not NULL, increments the module counter | |
95 | */ | |
53d2f744 TI |
96 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
97 | struct snd_timer *timer) | |
1da177e4 | 98 | { |
53d2f744 | 99 | struct snd_timer_instance *timeri; |
ca2c0966 | 100 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
101 | if (timeri == NULL) |
102 | return NULL; | |
543537bd | 103 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
104 | if (! timeri->owner) { |
105 | kfree(timeri); | |
106 | return NULL; | |
107 | } | |
108 | INIT_LIST_HEAD(&timeri->open_list); | |
109 | INIT_LIST_HEAD(&timeri->active_list); | |
110 | INIT_LIST_HEAD(&timeri->ack_list); | |
111 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
112 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
113 | ||
114 | timeri->timer = timer; | |
de24214d | 115 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
116 | kfree(timeri->owner); |
117 | kfree(timeri); | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | return timeri; | |
122 | } | |
123 | ||
124 | /* | |
125 | * find a timer instance from the given timer id | |
126 | */ | |
53d2f744 | 127 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 128 | { |
53d2f744 | 129 | struct snd_timer *timer = NULL; |
1da177e4 | 130 | |
9244b2c3 | 131 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
132 | if (timer->tmr_class != tid->dev_class) |
133 | continue; | |
134 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
135 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
136 | (timer->card == NULL || | |
137 | timer->card->number != tid->card)) | |
138 | continue; | |
139 | if (timer->tmr_device != tid->device) | |
140 | continue; | |
141 | if (timer->tmr_subdevice != tid->subdevice) | |
142 | continue; | |
143 | return timer; | |
144 | } | |
145 | return NULL; | |
146 | } | |
147 | ||
148 | #ifdef CONFIG_KMOD | |
149 | ||
53d2f744 | 150 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 LT |
151 | { |
152 | if (! current->fs->root) | |
153 | return; | |
154 | switch (tid->dev_class) { | |
155 | case SNDRV_TIMER_CLASS_GLOBAL: | |
156 | if (tid->device < timer_limit) | |
157 | request_module("snd-timer-%i", tid->device); | |
158 | break; | |
159 | case SNDRV_TIMER_CLASS_CARD: | |
160 | case SNDRV_TIMER_CLASS_PCM: | |
161 | if (tid->card < snd_ecards_limit) | |
162 | request_module("snd-card-%i", tid->card); | |
163 | break; | |
164 | default: | |
165 | break; | |
166 | } | |
167 | } | |
168 | ||
169 | #endif | |
170 | ||
171 | /* | |
172 | * look for a master instance matching with the slave id of the given slave. | |
173 | * when found, relink the open_link of the slave. | |
174 | * | |
175 | * call this with register_mutex down. | |
176 | */ | |
53d2f744 | 177 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 178 | { |
53d2f744 TI |
179 | struct snd_timer *timer; |
180 | struct snd_timer_instance *master; | |
1da177e4 LT |
181 | |
182 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
183 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
184 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
185 | if (slave->slave_class == master->slave_class && |
186 | slave->slave_id == master->slave_id) { | |
187 | list_del(&slave->open_list); | |
6b172a85 CL |
188 | list_add_tail(&slave->open_list, |
189 | &master->slave_list_head); | |
1da177e4 LT |
190 | spin_lock_irq(&slave_active_lock); |
191 | slave->master = master; | |
192 | slave->timer = master->timer; | |
193 | spin_unlock_irq(&slave_active_lock); | |
194 | return; | |
195 | } | |
196 | } | |
197 | } | |
198 | } | |
199 | ||
200 | /* | |
201 | * look for slave instances matching with the slave id of the given master. | |
202 | * when found, relink the open_link of slaves. | |
203 | * | |
204 | * call this with register_mutex down. | |
205 | */ | |
53d2f744 | 206 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 207 | { |
9244b2c3 | 208 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
209 | |
210 | /* check all pending slaves */ | |
9244b2c3 | 211 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
212 | if (slave->slave_class == master->slave_class && |
213 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 214 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 LT |
215 | spin_lock_irq(&slave_active_lock); |
216 | slave->master = master; | |
217 | slave->timer = master->timer; | |
218 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
219 | list_add_tail(&slave->active_list, |
220 | &master->slave_active_head); | |
1da177e4 LT |
221 | spin_unlock_irq(&slave_active_lock); |
222 | } | |
223 | } | |
224 | } | |
225 | ||
226 | /* | |
227 | * open a timer instance | |
228 | * when opening a master, the slave id must be here given. | |
229 | */ | |
53d2f744 TI |
230 | int snd_timer_open(struct snd_timer_instance **ti, |
231 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
232 | unsigned int slave_id) |
233 | { | |
53d2f744 TI |
234 | struct snd_timer *timer; |
235 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 236 | |
1da177e4 LT |
237 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
238 | /* open a slave instance */ | |
239 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
240 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
241 | snd_printd("invalid slave class %i\n", tid->dev_sclass); | |
242 | return -EINVAL; | |
243 | } | |
1a60d4c5 | 244 | mutex_lock(®ister_mutex); |
1da177e4 | 245 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 246 | if (!timeri) { |
1a60d4c5 | 247 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
248 | return -ENOMEM; |
249 | } | |
1da177e4 LT |
250 | timeri->slave_class = tid->dev_sclass; |
251 | timeri->slave_id = tid->device; | |
252 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
253 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
254 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 255 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
256 | *ti = timeri; |
257 | return 0; | |
258 | } | |
259 | ||
260 | /* open a master instance */ | |
1a60d4c5 | 261 | mutex_lock(®ister_mutex); |
1da177e4 LT |
262 | timer = snd_timer_find(tid); |
263 | #ifdef CONFIG_KMOD | |
264 | if (timer == NULL) { | |
1a60d4c5 | 265 | mutex_unlock(®ister_mutex); |
1da177e4 | 266 | snd_timer_request(tid); |
1a60d4c5 | 267 | mutex_lock(®ister_mutex); |
1da177e4 LT |
268 | timer = snd_timer_find(tid); |
269 | } | |
270 | #endif | |
2fd43d11 | 271 | if (!timer) { |
1a60d4c5 | 272 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
273 | return -ENODEV; |
274 | } | |
2fd43d11 CL |
275 | if (!list_empty(&timer->open_list_head)) { |
276 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 277 | struct snd_timer_instance, open_list); |
2fd43d11 | 278 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 279 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
280 | return -EBUSY; |
281 | } | |
282 | } | |
283 | timeri = snd_timer_instance_new(owner, timer); | |
284 | if (!timeri) { | |
1a60d4c5 | 285 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
286 | return -ENOMEM; |
287 | } | |
288 | timeri->slave_class = tid->dev_sclass; | |
289 | timeri->slave_id = slave_id; | |
290 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
291 | timer->hw.open(timer); | |
292 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
293 | snd_timer_check_master(timeri); | |
1a60d4c5 | 294 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
295 | *ti = timeri; |
296 | return 0; | |
297 | } | |
298 | ||
53d2f744 TI |
299 | static int _snd_timer_stop(struct snd_timer_instance *timeri, |
300 | int keep_flag, int event); | |
1da177e4 LT |
301 | |
302 | /* | |
303 | * close a timer instance | |
304 | */ | |
53d2f744 | 305 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 306 | { |
53d2f744 | 307 | struct snd_timer *timer = NULL; |
9244b2c3 | 308 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
309 | |
310 | snd_assert(timeri != NULL, return -ENXIO); | |
311 | ||
312 | /* force to stop the timer */ | |
313 | snd_timer_stop(timeri); | |
314 | ||
315 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
316 | /* wait, until the active callback is finished */ | |
317 | spin_lock_irq(&slave_active_lock); | |
318 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
319 | spin_unlock_irq(&slave_active_lock); | |
320 | udelay(10); | |
321 | spin_lock_irq(&slave_active_lock); | |
322 | } | |
323 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 324 | mutex_lock(®ister_mutex); |
1da177e4 | 325 | list_del(&timeri->open_list); |
1a60d4c5 | 326 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
327 | } else { |
328 | timer = timeri->timer; | |
329 | /* wait, until the active callback is finished */ | |
330 | spin_lock_irq(&timer->lock); | |
331 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
332 | spin_unlock_irq(&timer->lock); | |
333 | udelay(10); | |
334 | spin_lock_irq(&timer->lock); | |
335 | } | |
336 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 337 | mutex_lock(®ister_mutex); |
1da177e4 | 338 | list_del(&timeri->open_list); |
6b172a85 CL |
339 | if (timer && list_empty(&timer->open_list_head) && |
340 | timer->hw.close) | |
1da177e4 LT |
341 | timer->hw.close(timer); |
342 | /* remove slave links */ | |
9244b2c3 JB |
343 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
344 | open_list) { | |
1da177e4 LT |
345 | spin_lock_irq(&slave_active_lock); |
346 | _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); | |
9244b2c3 | 347 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
348 | slave->master = NULL; |
349 | slave->timer = NULL; | |
350 | spin_unlock_irq(&slave_active_lock); | |
351 | } | |
1a60d4c5 | 352 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
353 | } |
354 | if (timeri->private_free) | |
355 | timeri->private_free(timeri); | |
356 | kfree(timeri->owner); | |
357 | kfree(timeri); | |
de24214d CL |
358 | if (timer) |
359 | module_put(timer->module); | |
1da177e4 LT |
360 | return 0; |
361 | } | |
362 | ||
53d2f744 | 363 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 364 | { |
53d2f744 | 365 | struct snd_timer * timer; |
1da177e4 LT |
366 | |
367 | if (timeri == NULL) | |
368 | return 0; | |
369 | if ((timer = timeri->timer) != NULL) { | |
370 | if (timer->hw.c_resolution) | |
371 | return timer->hw.c_resolution(timer); | |
372 | return timer->hw.resolution; | |
373 | } | |
374 | return 0; | |
375 | } | |
376 | ||
53d2f744 | 377 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 378 | { |
53d2f744 | 379 | struct snd_timer *timer; |
1da177e4 LT |
380 | unsigned long flags; |
381 | unsigned long resolution = 0; | |
53d2f744 | 382 | struct snd_timer_instance *ts; |
1da177e4 LT |
383 | struct timespec tstamp; |
384 | ||
07799e75 | 385 | getnstimeofday(&tstamp); |
6b172a85 CL |
386 | snd_assert(event >= SNDRV_TIMER_EVENT_START && |
387 | event <= SNDRV_TIMER_EVENT_PAUSE, return); | |
388 | if (event == SNDRV_TIMER_EVENT_START || | |
389 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
390 | resolution = snd_timer_resolution(ti); |
391 | if (ti->ccallback) | |
392 | ti->ccallback(ti, SNDRV_TIMER_EVENT_START, &tstamp, resolution); | |
393 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) | |
394 | return; | |
395 | timer = ti->timer; | |
396 | if (timer == NULL) | |
397 | return; | |
398 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
399 | return; | |
400 | spin_lock_irqsave(&timer->lock, flags); | |
9244b2c3 | 401 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
402 | if (ts->ccallback) |
403 | ts->ccallback(ti, event + 100, &tstamp, resolution); | |
1da177e4 LT |
404 | spin_unlock_irqrestore(&timer->lock, flags); |
405 | } | |
406 | ||
53d2f744 | 407 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
6b172a85 | 408 | unsigned long sticks) |
1da177e4 LT |
409 | { |
410 | list_del(&timeri->active_list); | |
411 | list_add_tail(&timeri->active_list, &timer->active_list_head); | |
412 | if (timer->running) { | |
413 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
414 | goto __start_now; | |
415 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
416 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
417 | return 1; /* delayed start */ | |
418 | } else { | |
419 | timer->sticks = sticks; | |
420 | timer->hw.start(timer); | |
421 | __start_now: | |
422 | timer->running++; | |
423 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
424 | return 0; | |
425 | } | |
426 | } | |
427 | ||
53d2f744 | 428 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
1da177e4 LT |
429 | { |
430 | unsigned long flags; | |
431 | ||
432 | spin_lock_irqsave(&slave_active_lock, flags); | |
433 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
434 | if (timeri->master) | |
6b172a85 CL |
435 | list_add_tail(&timeri->active_list, |
436 | &timeri->master->slave_active_head); | |
1da177e4 LT |
437 | spin_unlock_irqrestore(&slave_active_lock, flags); |
438 | return 1; /* delayed start */ | |
439 | } | |
440 | ||
441 | /* | |
442 | * start the timer instance | |
6b172a85 | 443 | */ |
53d2f744 | 444 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
1da177e4 | 445 | { |
53d2f744 | 446 | struct snd_timer *timer; |
1da177e4 LT |
447 | int result = -EINVAL; |
448 | unsigned long flags; | |
449 | ||
450 | if (timeri == NULL || ticks < 1) | |
451 | return -EINVAL; | |
452 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
453 | result = snd_timer_start_slave(timeri); | |
454 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
455 | return result; | |
456 | } | |
457 | timer = timeri->timer; | |
458 | if (timer == NULL) | |
459 | return -EINVAL; | |
460 | spin_lock_irqsave(&timer->lock, flags); | |
461 | timeri->ticks = timeri->cticks = ticks; | |
462 | timeri->pticks = 0; | |
463 | result = snd_timer_start1(timer, timeri, ticks); | |
464 | spin_unlock_irqrestore(&timer->lock, flags); | |
465 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
466 | return result; | |
467 | } | |
468 | ||
53d2f744 TI |
469 | static int _snd_timer_stop(struct snd_timer_instance * timeri, |
470 | int keep_flag, int event) | |
1da177e4 | 471 | { |
53d2f744 | 472 | struct snd_timer *timer; |
1da177e4 LT |
473 | unsigned long flags; |
474 | ||
475 | snd_assert(timeri != NULL, return -ENXIO); | |
476 | ||
477 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
478 | if (!keep_flag) { | |
479 | spin_lock_irqsave(&slave_active_lock, flags); | |
480 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
481 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
482 | } | |
483 | goto __end; | |
484 | } | |
485 | timer = timeri->timer; | |
486 | if (!timer) | |
487 | return -EINVAL; | |
488 | spin_lock_irqsave(&timer->lock, flags); | |
489 | list_del_init(&timeri->ack_list); | |
490 | list_del_init(&timeri->active_list); | |
491 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
492 | !(--timer->running)) { | |
493 | timer->hw.stop(timer); | |
494 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
495 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
496 | snd_timer_reschedule(timer, 0); | |
497 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
498 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
499 | timer->hw.start(timer); | |
500 | } | |
501 | } | |
502 | } | |
503 | if (!keep_flag) | |
6b172a85 CL |
504 | timeri->flags &= |
505 | ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); | |
1da177e4 LT |
506 | spin_unlock_irqrestore(&timer->lock, flags); |
507 | __end: | |
508 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
509 | snd_timer_notify1(timeri, event); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | /* | |
514 | * stop the timer instance. | |
515 | * | |
516 | * do not call this from the timer callback! | |
517 | */ | |
53d2f744 | 518 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 519 | { |
53d2f744 | 520 | struct snd_timer *timer; |
1da177e4 LT |
521 | unsigned long flags; |
522 | int err; | |
523 | ||
524 | err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); | |
525 | if (err < 0) | |
526 | return err; | |
527 | timer = timeri->timer; | |
528 | spin_lock_irqsave(&timer->lock, flags); | |
529 | timeri->cticks = timeri->ticks; | |
530 | timeri->pticks = 0; | |
531 | spin_unlock_irqrestore(&timer->lock, flags); | |
532 | return 0; | |
533 | } | |
534 | ||
535 | /* | |
536 | * start again.. the tick is kept. | |
537 | */ | |
53d2f744 | 538 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 539 | { |
53d2f744 | 540 | struct snd_timer *timer; |
1da177e4 LT |
541 | int result = -EINVAL; |
542 | unsigned long flags; | |
543 | ||
544 | if (timeri == NULL) | |
545 | return result; | |
546 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
547 | return snd_timer_start_slave(timeri); | |
548 | timer = timeri->timer; | |
549 | if (! timer) | |
550 | return -EINVAL; | |
551 | spin_lock_irqsave(&timer->lock, flags); | |
552 | if (!timeri->cticks) | |
553 | timeri->cticks = 1; | |
554 | timeri->pticks = 0; | |
555 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
556 | spin_unlock_irqrestore(&timer->lock, flags); | |
557 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
558 | return result; | |
559 | } | |
560 | ||
561 | /* | |
562 | * pause.. remember the ticks left | |
563 | */ | |
53d2f744 | 564 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 LT |
565 | { |
566 | return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); | |
567 | } | |
568 | ||
569 | /* | |
570 | * reschedule the timer | |
571 | * | |
572 | * start pending instances and check the scheduling ticks. | |
573 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
574 | */ | |
53d2f744 | 575 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 576 | { |
53d2f744 | 577 | struct snd_timer_instance *ti; |
1da177e4 | 578 | unsigned long ticks = ~0UL; |
1da177e4 | 579 | |
9244b2c3 | 580 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
581 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
582 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
583 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
584 | timer->running++; | |
585 | } | |
586 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
587 | if (ticks > ti->cticks) | |
588 | ticks = ti->cticks; | |
589 | } | |
590 | } | |
591 | if (ticks == ~0UL) { | |
592 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
593 | return; | |
594 | } | |
595 | if (ticks > timer->hw.ticks) | |
596 | ticks = timer->hw.ticks; | |
597 | if (ticks_left != ticks) | |
598 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
599 | timer->sticks = ticks; | |
600 | } | |
601 | ||
602 | /* | |
603 | * timer tasklet | |
604 | * | |
605 | */ | |
606 | static void snd_timer_tasklet(unsigned long arg) | |
607 | { | |
53d2f744 TI |
608 | struct snd_timer *timer = (struct snd_timer *) arg; |
609 | struct snd_timer_instance *ti; | |
1da177e4 LT |
610 | struct list_head *p; |
611 | unsigned long resolution, ticks; | |
2999ff5b | 612 | unsigned long flags; |
1da177e4 | 613 | |
2999ff5b | 614 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
615 | /* now process all callbacks */ |
616 | while (!list_empty(&timer->sack_list_head)) { | |
617 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 618 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
619 | |
620 | /* remove from ack_list and make empty */ | |
621 | list_del_init(p); | |
6b172a85 | 622 | |
1da177e4 LT |
623 | ticks = ti->pticks; |
624 | ti->pticks = 0; | |
625 | resolution = ti->resolution; | |
626 | ||
627 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
628 | spin_unlock(&timer->lock); | |
629 | if (ti->callback) | |
630 | ti->callback(ti, resolution, ticks); | |
631 | spin_lock(&timer->lock); | |
632 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
633 | } | |
2999ff5b | 634 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
635 | } |
636 | ||
637 | /* | |
638 | * timer interrupt | |
639 | * | |
640 | * ticks_left is usually equal to timer->sticks. | |
641 | * | |
642 | */ | |
53d2f744 | 643 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 644 | { |
9244b2c3 | 645 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 646 | unsigned long resolution, ticks; |
9244b2c3 | 647 | struct list_head *p, *ack_list_head; |
b32425ac | 648 | unsigned long flags; |
1da177e4 LT |
649 | int use_tasklet = 0; |
650 | ||
651 | if (timer == NULL) | |
652 | return; | |
653 | ||
b32425ac | 654 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
655 | |
656 | /* remember the current resolution */ | |
657 | if (timer->hw.c_resolution) | |
658 | resolution = timer->hw.c_resolution(timer); | |
659 | else | |
660 | resolution = timer->hw.resolution; | |
661 | ||
662 | /* loop for all active instances | |
9244b2c3 | 663 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
664 | * processed instance is relinked to done_list_head before the callback |
665 | * is called. | |
1da177e4 | 666 | */ |
9244b2c3 JB |
667 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
668 | active_list) { | |
1da177e4 LT |
669 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
670 | continue; | |
671 | ti->pticks += ticks_left; | |
672 | ti->resolution = resolution; | |
673 | if (ti->cticks < ticks_left) | |
674 | ti->cticks = 0; | |
675 | else | |
676 | ti->cticks -= ticks_left; | |
677 | if (ti->cticks) /* not expired */ | |
678 | continue; | |
679 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
680 | ti->cticks = ti->ticks; | |
681 | } else { | |
682 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
683 | if (--timer->running) | |
9244b2c3 | 684 | list_del(&ti->active_list); |
1da177e4 | 685 | } |
6b172a85 CL |
686 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
687 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
688 | ack_list_head = &timer->ack_list_head; | |
689 | else | |
690 | ack_list_head = &timer->sack_list_head; | |
691 | if (list_empty(&ti->ack_list)) | |
692 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 693 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
694 | ts->pticks = ti->pticks; |
695 | ts->resolution = resolution; | |
6b172a85 CL |
696 | if (list_empty(&ts->ack_list)) |
697 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
698 | } |
699 | } | |
700 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 701 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
702 | if (timer->running) { |
703 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
704 | timer->hw.stop(timer); | |
705 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
706 | } | |
707 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
708 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
709 | /* restart timer */ | |
710 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
711 | timer->hw.start(timer); | |
712 | } | |
713 | } else { | |
714 | timer->hw.stop(timer); | |
715 | } | |
716 | ||
717 | /* now process all fast callbacks */ | |
718 | while (!list_empty(&timer->ack_list_head)) { | |
719 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 720 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 721 | |
1da177e4 LT |
722 | /* remove from ack_list and make empty */ |
723 | list_del_init(p); | |
6b172a85 | 724 | |
1da177e4 LT |
725 | ticks = ti->pticks; |
726 | ti->pticks = 0; | |
727 | ||
728 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
729 | spin_unlock(&timer->lock); | |
730 | if (ti->callback) | |
731 | ti->callback(ti, resolution, ticks); | |
732 | spin_lock(&timer->lock); | |
733 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
734 | } | |
735 | ||
736 | /* do we have any slow callbacks? */ | |
737 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 738 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
739 | |
740 | if (use_tasklet) | |
741 | tasklet_hi_schedule(&timer->task_queue); | |
742 | } | |
743 | ||
744 | /* | |
745 | ||
746 | */ | |
747 | ||
53d2f744 TI |
748 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
749 | struct snd_timer **rtimer) | |
1da177e4 | 750 | { |
53d2f744 | 751 | struct snd_timer *timer; |
1da177e4 | 752 | int err; |
53d2f744 | 753 | static struct snd_device_ops ops = { |
1da177e4 LT |
754 | .dev_free = snd_timer_dev_free, |
755 | .dev_register = snd_timer_dev_register, | |
c461482c | 756 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
757 | }; |
758 | ||
759 | snd_assert(tid != NULL, return -EINVAL); | |
760 | snd_assert(rtimer != NULL, return -EINVAL); | |
761 | *rtimer = NULL; | |
ca2c0966 | 762 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
73e77ba0 TI |
763 | if (timer == NULL) { |
764 | snd_printk(KERN_ERR "timer: cannot allocate\n"); | |
1da177e4 | 765 | return -ENOMEM; |
73e77ba0 | 766 | } |
1da177e4 LT |
767 | timer->tmr_class = tid->dev_class; |
768 | timer->card = card; | |
769 | timer->tmr_device = tid->device; | |
770 | timer->tmr_subdevice = tid->subdevice; | |
771 | if (id) | |
772 | strlcpy(timer->id, id, sizeof(timer->id)); | |
773 | INIT_LIST_HEAD(&timer->device_list); | |
774 | INIT_LIST_HEAD(&timer->open_list_head); | |
775 | INIT_LIST_HEAD(&timer->active_list_head); | |
776 | INIT_LIST_HEAD(&timer->ack_list_head); | |
777 | INIT_LIST_HEAD(&timer->sack_list_head); | |
778 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
779 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
780 | (unsigned long)timer); | |
1da177e4 | 781 | if (card != NULL) { |
de24214d | 782 | timer->module = card->module; |
6b172a85 CL |
783 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
784 | if (err < 0) { | |
1da177e4 LT |
785 | snd_timer_free(timer); |
786 | return err; | |
787 | } | |
788 | } | |
789 | *rtimer = timer; | |
790 | return 0; | |
791 | } | |
792 | ||
53d2f744 | 793 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 LT |
794 | { |
795 | snd_assert(timer != NULL, return -ENXIO); | |
c461482c TI |
796 | |
797 | mutex_lock(®ister_mutex); | |
798 | if (! list_empty(&timer->open_list_head)) { | |
799 | struct list_head *p, *n; | |
800 | struct snd_timer_instance *ti; | |
801 | snd_printk(KERN_WARNING "timer %p is busy?\n", timer); | |
802 | list_for_each_safe(p, n, &timer->open_list_head) { | |
803 | list_del_init(p); | |
804 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
805 | ti->timer = NULL; | |
806 | } | |
807 | } | |
808 | list_del(&timer->device_list); | |
809 | mutex_unlock(®ister_mutex); | |
810 | ||
1da177e4 LT |
811 | if (timer->private_free) |
812 | timer->private_free(timer); | |
813 | kfree(timer); | |
814 | return 0; | |
815 | } | |
816 | ||
53d2f744 | 817 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 818 | { |
53d2f744 | 819 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
820 | return snd_timer_free(timer); |
821 | } | |
822 | ||
53d2f744 | 823 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 824 | { |
53d2f744 TI |
825 | struct snd_timer *timer = dev->device_data; |
826 | struct snd_timer *timer1; | |
1da177e4 | 827 | |
6b172a85 CL |
828 | snd_assert(timer != NULL && timer->hw.start != NULL && |
829 | timer->hw.stop != NULL, return -ENXIO); | |
1da177e4 LT |
830 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
831 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
832 | return -EINVAL; | |
833 | ||
1a60d4c5 | 834 | mutex_lock(®ister_mutex); |
9244b2c3 | 835 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
836 | if (timer1->tmr_class > timer->tmr_class) |
837 | break; | |
838 | if (timer1->tmr_class < timer->tmr_class) | |
839 | continue; | |
840 | if (timer1->card && timer->card) { | |
841 | if (timer1->card->number > timer->card->number) | |
842 | break; | |
843 | if (timer1->card->number < timer->card->number) | |
844 | continue; | |
845 | } | |
846 | if (timer1->tmr_device > timer->tmr_device) | |
847 | break; | |
848 | if (timer1->tmr_device < timer->tmr_device) | |
849 | continue; | |
850 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
851 | break; | |
852 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
853 | continue; | |
854 | /* conflicts.. */ | |
1a60d4c5 | 855 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
856 | return -EBUSY; |
857 | } | |
9244b2c3 | 858 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 859 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
860 | return 0; |
861 | } | |
862 | ||
c461482c | 863 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 864 | { |
c461482c | 865 | struct snd_timer *timer = device->device_data; |
1a60d4c5 | 866 | mutex_lock(®ister_mutex); |
c461482c | 867 | list_del_init(&timer->device_list); |
1a60d4c5 | 868 | mutex_unlock(®ister_mutex); |
c461482c | 869 | return 0; |
1da177e4 LT |
870 | } |
871 | ||
53d2f744 | 872 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
873 | { |
874 | unsigned long flags; | |
875 | unsigned long resolution = 0; | |
53d2f744 | 876 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 877 | |
7c22f1aa TI |
878 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
879 | return; | |
6b172a85 CL |
880 | snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && |
881 | event <= SNDRV_TIMER_EVENT_MRESUME, return); | |
1da177e4 | 882 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
883 | if (event == SNDRV_TIMER_EVENT_MSTART || |
884 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
885 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
886 | if (timer->hw.c_resolution) |
887 | resolution = timer->hw.c_resolution(timer); | |
888 | else | |
889 | resolution = timer->hw.resolution; | |
890 | } | |
9244b2c3 | 891 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
892 | if (ti->ccallback) |
893 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 894 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
895 | if (ts->ccallback) |
896 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
897 | } |
898 | spin_unlock_irqrestore(&timer->lock, flags); | |
899 | } | |
900 | ||
901 | /* | |
902 | * exported functions for global timers | |
903 | */ | |
53d2f744 | 904 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 905 | { |
53d2f744 | 906 | struct snd_timer_id tid; |
6b172a85 | 907 | |
1da177e4 LT |
908 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
909 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
910 | tid.card = -1; | |
911 | tid.device = device; | |
912 | tid.subdevice = 0; | |
913 | return snd_timer_new(NULL, id, &tid, rtimer); | |
914 | } | |
915 | ||
53d2f744 | 916 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
917 | { |
918 | return snd_timer_free(timer); | |
919 | } | |
920 | ||
53d2f744 | 921 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 922 | { |
53d2f744 | 923 | struct snd_device dev; |
1da177e4 LT |
924 | |
925 | memset(&dev, 0, sizeof(dev)); | |
926 | dev.device_data = timer; | |
927 | return snd_timer_dev_register(&dev); | |
928 | } | |
929 | ||
6b172a85 | 930 | /* |
1da177e4 LT |
931 | * System timer |
932 | */ | |
933 | ||
934 | struct snd_timer_system_private { | |
935 | struct timer_list tlist; | |
1da177e4 LT |
936 | unsigned long last_expires; |
937 | unsigned long last_jiffies; | |
938 | unsigned long correction; | |
939 | }; | |
940 | ||
1da177e4 LT |
941 | static void snd_timer_s_function(unsigned long data) |
942 | { | |
53d2f744 | 943 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
944 | struct snd_timer_system_private *priv = timer->private_data; |
945 | unsigned long jiff = jiffies; | |
946 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 947 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
948 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
949 | } | |
950 | ||
53d2f744 | 951 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
952 | { |
953 | struct snd_timer_system_private *priv; | |
954 | unsigned long njiff; | |
955 | ||
956 | priv = (struct snd_timer_system_private *) timer->private_data; | |
957 | njiff = (priv->last_jiffies = jiffies); | |
958 | if (priv->correction > timer->sticks - 1) { | |
959 | priv->correction -= timer->sticks - 1; | |
960 | njiff++; | |
961 | } else { | |
962 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 963 | priv->correction = 0; |
1da177e4 LT |
964 | } |
965 | priv->last_expires = priv->tlist.expires = njiff; | |
966 | add_timer(&priv->tlist); | |
967 | return 0; | |
968 | } | |
969 | ||
53d2f744 | 970 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
971 | { |
972 | struct snd_timer_system_private *priv; | |
973 | unsigned long jiff; | |
974 | ||
975 | priv = (struct snd_timer_system_private *) timer->private_data; | |
976 | del_timer(&priv->tlist); | |
977 | jiff = jiffies; | |
978 | if (time_before(jiff, priv->last_expires)) | |
979 | timer->sticks = priv->last_expires - jiff; | |
980 | else | |
981 | timer->sticks = 1; | |
de2696d8 | 982 | priv->correction = 0; |
1da177e4 LT |
983 | return 0; |
984 | } | |
985 | ||
53d2f744 | 986 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
987 | { |
988 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
989 | .resolution = 1000000000L / HZ, | |
990 | .ticks = 10000000L, | |
991 | .start = snd_timer_s_start, | |
992 | .stop = snd_timer_s_stop | |
993 | }; | |
994 | ||
53d2f744 | 995 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
996 | { |
997 | kfree(timer->private_data); | |
998 | } | |
999 | ||
1000 | static int snd_timer_register_system(void) | |
1001 | { | |
53d2f744 | 1002 | struct snd_timer *timer; |
1da177e4 LT |
1003 | struct snd_timer_system_private *priv; |
1004 | int err; | |
1005 | ||
6b172a85 CL |
1006 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1007 | if (err < 0) | |
1da177e4 LT |
1008 | return err; |
1009 | strcpy(timer->name, "system timer"); | |
1010 | timer->hw = snd_timer_system; | |
ca2c0966 | 1011 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1012 | if (priv == NULL) { |
1013 | snd_timer_free(timer); | |
1014 | return -ENOMEM; | |
1015 | } | |
1016 | init_timer(&priv->tlist); | |
1017 | priv->tlist.function = snd_timer_s_function; | |
1018 | priv->tlist.data = (unsigned long) timer; | |
1019 | timer->private_data = priv; | |
1020 | timer->private_free = snd_timer_free_system; | |
1021 | return snd_timer_global_register(timer); | |
1022 | } | |
1023 | ||
e28563cc | 1024 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1025 | /* |
1026 | * Info interface | |
1027 | */ | |
1028 | ||
53d2f744 TI |
1029 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1030 | struct snd_info_buffer *buffer) | |
1da177e4 | 1031 | { |
53d2f744 TI |
1032 | struct snd_timer *timer; |
1033 | struct snd_timer_instance *ti; | |
1da177e4 | 1034 | |
1a60d4c5 | 1035 | mutex_lock(®ister_mutex); |
9244b2c3 | 1036 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
1037 | switch (timer->tmr_class) { |
1038 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1039 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1040 | break; | |
1041 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1042 | snd_iprintf(buffer, "C%i-%i: ", |
1043 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1044 | break; |
1045 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1046 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1047 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1048 | break; |
1049 | default: | |
6b172a85 CL |
1050 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1051 | timer->card ? timer->card->number : -1, | |
1052 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1053 | } |
1054 | snd_iprintf(buffer, "%s :", timer->name); | |
1055 | if (timer->hw.resolution) | |
6b172a85 CL |
1056 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1057 | timer->hw.resolution / 1000, | |
1058 | timer->hw.resolution % 1000, | |
1059 | timer->hw.ticks); | |
1da177e4 LT |
1060 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1061 | snd_iprintf(buffer, " SLAVE"); | |
1062 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1063 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1064 | snd_iprintf(buffer, " Client %s : %s\n", |
1065 | ti->owner ? ti->owner : "unknown", | |
1066 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1067 | SNDRV_TIMER_IFLG_RUNNING) | |
1068 | ? "running" : "stopped"); | |
1da177e4 | 1069 | } |
1a60d4c5 | 1070 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1071 | } |
1072 | ||
6581f4e7 | 1073 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1074 | |
1075 | static void __init snd_timer_proc_init(void) | |
1076 | { | |
1077 | struct snd_info_entry *entry; | |
1078 | ||
1079 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1080 | if (entry != NULL) { | |
e28563cc TI |
1081 | entry->c.text.read = snd_timer_proc_read; |
1082 | if (snd_info_register(entry) < 0) { | |
1083 | snd_info_free_entry(entry); | |
1084 | entry = NULL; | |
1085 | } | |
1086 | } | |
1087 | snd_timer_proc_entry = entry; | |
1088 | } | |
1089 | ||
1090 | static void __exit snd_timer_proc_done(void) | |
1091 | { | |
746d4a02 | 1092 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc TI |
1093 | } |
1094 | #else /* !CONFIG_PROC_FS */ | |
1095 | #define snd_timer_proc_init() | |
1096 | #define snd_timer_proc_done() | |
1097 | #endif | |
1098 | ||
1da177e4 LT |
1099 | /* |
1100 | * USER SPACE interface | |
1101 | */ | |
1102 | ||
53d2f744 | 1103 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1104 | unsigned long resolution, |
1105 | unsigned long ticks) | |
1106 | { | |
53d2f744 TI |
1107 | struct snd_timer_user *tu = timeri->callback_data; |
1108 | struct snd_timer_read *r; | |
1da177e4 | 1109 | int prev; |
6b172a85 | 1110 | |
1da177e4 LT |
1111 | spin_lock(&tu->qlock); |
1112 | if (tu->qused > 0) { | |
1113 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1114 | r = &tu->queue[prev]; | |
1115 | if (r->resolution == resolution) { | |
1116 | r->ticks += ticks; | |
1117 | goto __wake; | |
1118 | } | |
1119 | } | |
1120 | if (tu->qused >= tu->queue_size) { | |
1121 | tu->overrun++; | |
1122 | } else { | |
1123 | r = &tu->queue[tu->qtail++]; | |
1124 | tu->qtail %= tu->queue_size; | |
1125 | r->resolution = resolution; | |
1126 | r->ticks = ticks; | |
1127 | tu->qused++; | |
1128 | } | |
1129 | __wake: | |
1130 | spin_unlock(&tu->qlock); | |
1131 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1132 | wake_up(&tu->qchange_sleep); | |
1133 | } | |
1134 | ||
53d2f744 TI |
1135 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1136 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1137 | { |
1138 | if (tu->qused >= tu->queue_size) { | |
1139 | tu->overrun++; | |
1140 | } else { | |
1141 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1142 | tu->qtail %= tu->queue_size; | |
1143 | tu->qused++; | |
1144 | } | |
1145 | } | |
1146 | ||
53d2f744 TI |
1147 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1148 | int event, | |
1da177e4 LT |
1149 | struct timespec *tstamp, |
1150 | unsigned long resolution) | |
1151 | { | |
53d2f744 TI |
1152 | struct snd_timer_user *tu = timeri->callback_data; |
1153 | struct snd_timer_tread r1; | |
1da177e4 | 1154 | |
6b172a85 CL |
1155 | if (event >= SNDRV_TIMER_EVENT_START && |
1156 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1157 | tu->tstamp = *tstamp; |
1158 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1159 | return; | |
1160 | r1.event = event; | |
1161 | r1.tstamp = *tstamp; | |
1162 | r1.val = resolution; | |
1163 | spin_lock(&tu->qlock); | |
1164 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1165 | spin_unlock(&tu->qlock); | |
1166 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1167 | wake_up(&tu->qchange_sleep); | |
1168 | } | |
1169 | ||
53d2f744 | 1170 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1171 | unsigned long resolution, |
1172 | unsigned long ticks) | |
1173 | { | |
53d2f744 TI |
1174 | struct snd_timer_user *tu = timeri->callback_data; |
1175 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1176 | struct timespec tstamp; |
1177 | int prev, append = 0; | |
1178 | ||
07799e75 | 1179 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1180 | spin_lock(&tu->qlock); |
6b172a85 CL |
1181 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1182 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1183 | spin_unlock(&tu->qlock); |
1184 | return; | |
1185 | } | |
1186 | if (tu->last_resolution != resolution || ticks > 0) | |
07799e75 | 1187 | getnstimeofday(&tstamp); |
6b172a85 CL |
1188 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1189 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1190 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1191 | r1.tstamp = tstamp; | |
1192 | r1.val = resolution; | |
1193 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1194 | tu->last_resolution = resolution; | |
1195 | append++; | |
1196 | } | |
1197 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1198 | goto __wake; | |
1199 | if (ticks == 0) | |
1200 | goto __wake; | |
1201 | if (tu->qused > 0) { | |
1202 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1203 | r = &tu->tqueue[prev]; | |
1204 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1205 | r->tstamp = tstamp; | |
1206 | r->val += ticks; | |
1207 | append++; | |
1208 | goto __wake; | |
1209 | } | |
1210 | } | |
1211 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1212 | r1.tstamp = tstamp; | |
1213 | r1.val = ticks; | |
1214 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1215 | append++; | |
1216 | __wake: | |
1217 | spin_unlock(&tu->qlock); | |
1218 | if (append == 0) | |
1219 | return; | |
1220 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1221 | wake_up(&tu->qchange_sleep); | |
1222 | } | |
1223 | ||
1224 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1225 | { | |
53d2f744 | 1226 | struct snd_timer_user *tu; |
6b172a85 | 1227 | |
ca2c0966 | 1228 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1229 | if (tu == NULL) |
1230 | return -ENOMEM; | |
1231 | spin_lock_init(&tu->qlock); | |
1232 | init_waitqueue_head(&tu->qchange_sleep); | |
1a60d4c5 | 1233 | mutex_init(&tu->tread_sem); |
1da177e4 LT |
1234 | tu->ticks = 1; |
1235 | tu->queue_size = 128; | |
53d2f744 | 1236 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1237 | GFP_KERNEL); |
1da177e4 LT |
1238 | if (tu->queue == NULL) { |
1239 | kfree(tu); | |
1240 | return -ENOMEM; | |
1241 | } | |
1242 | file->private_data = tu; | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1247 | { | |
53d2f744 | 1248 | struct snd_timer_user *tu; |
1da177e4 LT |
1249 | |
1250 | if (file->private_data) { | |
1251 | tu = file->private_data; | |
1252 | file->private_data = NULL; | |
1253 | fasync_helper(-1, file, 0, &tu->fasync); | |
1254 | if (tu->timeri) | |
1255 | snd_timer_close(tu->timeri); | |
1256 | kfree(tu->queue); | |
1257 | kfree(tu->tqueue); | |
1258 | kfree(tu); | |
1259 | } | |
1260 | return 0; | |
1261 | } | |
1262 | ||
53d2f744 | 1263 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1264 | { |
1265 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1266 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1267 | id->card = -1; | |
1268 | id->device = -1; | |
1269 | id->subdevice = -1; | |
1270 | } | |
1271 | ||
53d2f744 | 1272 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1273 | { |
1274 | id->dev_class = timer->tmr_class; | |
1275 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1276 | id->card = timer->card ? timer->card->number : -1; | |
1277 | id->device = timer->tmr_device; | |
1278 | id->subdevice = timer->tmr_subdevice; | |
1279 | } | |
1280 | ||
53d2f744 | 1281 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1282 | { |
53d2f744 TI |
1283 | struct snd_timer_id id; |
1284 | struct snd_timer *timer; | |
1da177e4 | 1285 | struct list_head *p; |
6b172a85 | 1286 | |
1da177e4 LT |
1287 | if (copy_from_user(&id, _tid, sizeof(id))) |
1288 | return -EFAULT; | |
1a60d4c5 | 1289 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1290 | if (id.dev_class < 0) { /* first item */ |
1291 | if (list_empty(&snd_timer_list)) | |
1292 | snd_timer_user_zero_id(&id); | |
1293 | else { | |
9dfba380 | 1294 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1295 | struct snd_timer, device_list); |
1da177e4 LT |
1296 | snd_timer_user_copy_id(&id, timer); |
1297 | } | |
1298 | } else { | |
1299 | switch (id.dev_class) { | |
1300 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1301 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1302 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1303 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1304 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1305 | snd_timer_user_copy_id(&id, timer); | |
1306 | break; | |
1307 | } | |
1308 | if (timer->tmr_device >= id.device) { | |
1309 | snd_timer_user_copy_id(&id, timer); | |
1310 | break; | |
1311 | } | |
1312 | } | |
1313 | if (p == &snd_timer_list) | |
1314 | snd_timer_user_zero_id(&id); | |
1315 | break; | |
1316 | case SNDRV_TIMER_CLASS_CARD: | |
1317 | case SNDRV_TIMER_CLASS_PCM: | |
1318 | if (id.card < 0) { | |
1319 | id.card = 0; | |
1320 | } else { | |
1321 | if (id.card < 0) { | |
1322 | id.card = 0; | |
1323 | } else { | |
1324 | if (id.device < 0) { | |
1325 | id.device = 0; | |
1326 | } else { | |
6b172a85 CL |
1327 | if (id.subdevice < 0) { |
1328 | id.subdevice = 0; | |
1329 | } else { | |
1330 | id.subdevice++; | |
1331 | } | |
1da177e4 LT |
1332 | } |
1333 | } | |
1334 | } | |
1335 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1336 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1337 | if (timer->tmr_class > id.dev_class) { |
1338 | snd_timer_user_copy_id(&id, timer); | |
1339 | break; | |
1340 | } | |
1341 | if (timer->tmr_class < id.dev_class) | |
1342 | continue; | |
1343 | if (timer->card->number > id.card) { | |
1344 | snd_timer_user_copy_id(&id, timer); | |
1345 | break; | |
1346 | } | |
1347 | if (timer->card->number < id.card) | |
1348 | continue; | |
1349 | if (timer->tmr_device > id.device) { | |
1350 | snd_timer_user_copy_id(&id, timer); | |
1351 | break; | |
1352 | } | |
1353 | if (timer->tmr_device < id.device) | |
1354 | continue; | |
1355 | if (timer->tmr_subdevice > id.subdevice) { | |
1356 | snd_timer_user_copy_id(&id, timer); | |
1357 | break; | |
1358 | } | |
1359 | if (timer->tmr_subdevice < id.subdevice) | |
1360 | continue; | |
1361 | snd_timer_user_copy_id(&id, timer); | |
1362 | break; | |
1363 | } | |
1364 | if (p == &snd_timer_list) | |
1365 | snd_timer_user_zero_id(&id); | |
1366 | break; | |
1367 | default: | |
1368 | snd_timer_user_zero_id(&id); | |
1369 | } | |
1370 | } | |
1a60d4c5 | 1371 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1372 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1373 | return -EFAULT; | |
1374 | return 0; | |
6b172a85 | 1375 | } |
1da177e4 | 1376 | |
6b172a85 | 1377 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1378 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1379 | { |
53d2f744 TI |
1380 | struct snd_timer_ginfo *ginfo; |
1381 | struct snd_timer_id tid; | |
1382 | struct snd_timer *t; | |
1da177e4 LT |
1383 | struct list_head *p; |
1384 | int err = 0; | |
1385 | ||
1386 | ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL); | |
1387 | if (! ginfo) | |
1388 | return -ENOMEM; | |
1389 | if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) { | |
1390 | kfree(ginfo); | |
1391 | return -EFAULT; | |
1392 | } | |
1393 | tid = ginfo->tid; | |
1394 | memset(ginfo, 0, sizeof(*ginfo)); | |
1395 | ginfo->tid = tid; | |
1a60d4c5 | 1396 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1397 | t = snd_timer_find(&tid); |
1398 | if (t != NULL) { | |
1399 | ginfo->card = t->card ? t->card->number : -1; | |
1400 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1401 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1402 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1403 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1404 | ginfo->resolution = t->hw.resolution; | |
1405 | if (t->hw.resolution_min > 0) { | |
1406 | ginfo->resolution_min = t->hw.resolution_min; | |
1407 | ginfo->resolution_max = t->hw.resolution_max; | |
1408 | } | |
1409 | list_for_each(p, &t->open_list_head) { | |
1410 | ginfo->clients++; | |
1411 | } | |
1412 | } else { | |
1413 | err = -ENODEV; | |
1414 | } | |
1a60d4c5 | 1415 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1416 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1417 | err = -EFAULT; | |
1418 | kfree(ginfo); | |
1419 | return err; | |
1420 | } | |
1421 | ||
6b172a85 | 1422 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1423 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1424 | { |
53d2f744 TI |
1425 | struct snd_timer_gparams gparams; |
1426 | struct snd_timer *t; | |
1da177e4 LT |
1427 | int err; |
1428 | ||
1429 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1430 | return -EFAULT; | |
1a60d4c5 | 1431 | mutex_lock(®ister_mutex); |
1da177e4 | 1432 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1433 | if (!t) { |
1da177e4 | 1434 | err = -ENODEV; |
6b172a85 CL |
1435 | goto _error; |
1436 | } | |
1437 | if (!list_empty(&t->open_list_head)) { | |
1438 | err = -EBUSY; | |
1439 | goto _error; | |
1440 | } | |
1441 | if (!t->hw.set_period) { | |
1442 | err = -ENOSYS; | |
1443 | goto _error; | |
1da177e4 | 1444 | } |
6b172a85 CL |
1445 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1446 | _error: | |
1a60d4c5 | 1447 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1448 | return err; |
1449 | } | |
1450 | ||
6b172a85 | 1451 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1452 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1453 | { |
53d2f744 TI |
1454 | struct snd_timer_gstatus gstatus; |
1455 | struct snd_timer_id tid; | |
1456 | struct snd_timer *t; | |
1da177e4 LT |
1457 | int err = 0; |
1458 | ||
1459 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1460 | return -EFAULT; | |
1461 | tid = gstatus.tid; | |
1462 | memset(&gstatus, 0, sizeof(gstatus)); | |
1463 | gstatus.tid = tid; | |
1a60d4c5 | 1464 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1465 | t = snd_timer_find(&tid); |
1466 | if (t != NULL) { | |
1467 | if (t->hw.c_resolution) | |
1468 | gstatus.resolution = t->hw.c_resolution(t); | |
1469 | else | |
1470 | gstatus.resolution = t->hw.resolution; | |
1471 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1472 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1473 | &gstatus.resolution_den); | |
1da177e4 LT |
1474 | } else { |
1475 | gstatus.resolution_num = gstatus.resolution; | |
1476 | gstatus.resolution_den = 1000000000uL; | |
1477 | } | |
1478 | } else { | |
1479 | err = -ENODEV; | |
1480 | } | |
1a60d4c5 | 1481 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1482 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1483 | err = -EFAULT; | |
1484 | return err; | |
1485 | } | |
1486 | ||
6b172a85 | 1487 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1488 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1489 | { |
53d2f744 TI |
1490 | struct snd_timer_user *tu; |
1491 | struct snd_timer_select tselect; | |
1da177e4 | 1492 | char str[32]; |
c1935b4d | 1493 | int err = 0; |
6b172a85 | 1494 | |
1da177e4 | 1495 | tu = file->private_data; |
1a60d4c5 | 1496 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1497 | if (tu->timeri) { |
1da177e4 | 1498 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1499 | tu->timeri = NULL; |
1500 | } | |
1501 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1502 | err = -EFAULT; | |
1503 | goto __err; | |
1504 | } | |
1da177e4 LT |
1505 | sprintf(str, "application %i", current->pid); |
1506 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1507 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1508 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1509 | if (err < 0) | |
c1935b4d | 1510 | goto __err; |
1da177e4 | 1511 | |
4d572776 JJ |
1512 | kfree(tu->queue); |
1513 | tu->queue = NULL; | |
1514 | kfree(tu->tqueue); | |
1515 | tu->tqueue = NULL; | |
1da177e4 | 1516 | if (tu->tread) { |
53d2f744 | 1517 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1518 | GFP_KERNEL); |
c1935b4d JK |
1519 | if (tu->tqueue == NULL) |
1520 | err = -ENOMEM; | |
1da177e4 | 1521 | } else { |
53d2f744 | 1522 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1523 | GFP_KERNEL); |
c1935b4d JK |
1524 | if (tu->queue == NULL) |
1525 | err = -ENOMEM; | |
1da177e4 | 1526 | } |
6b172a85 | 1527 | |
c1935b4d JK |
1528 | if (err < 0) { |
1529 | snd_timer_close(tu->timeri); | |
1530 | tu->timeri = NULL; | |
1531 | } else { | |
1532 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1533 | tu->timeri->callback = tu->tread |
1534 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1535 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1536 | tu->timeri->callback_data = (void *)tu; | |
1537 | } | |
1538 | ||
1539 | __err: | |
1a60d4c5 | 1540 | mutex_unlock(&tu->tread_sem); |
c1935b4d | 1541 | return err; |
1da177e4 LT |
1542 | } |
1543 | ||
6b172a85 | 1544 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1545 | struct snd_timer_info __user *_info) |
1da177e4 | 1546 | { |
53d2f744 TI |
1547 | struct snd_timer_user *tu; |
1548 | struct snd_timer_info *info; | |
1549 | struct snd_timer *t; | |
1da177e4 LT |
1550 | int err = 0; |
1551 | ||
1552 | tu = file->private_data; | |
1553 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1554 | t = tu->timeri->timer; | |
1555 | snd_assert(t != NULL, return -ENXIO); | |
1556 | ||
ca2c0966 | 1557 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1558 | if (! info) |
1559 | return -ENOMEM; | |
1560 | info->card = t->card ? t->card->number : -1; | |
1561 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1562 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1563 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1564 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1565 | info->resolution = t->hw.resolution; | |
1566 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1567 | err = -EFAULT; | |
1568 | kfree(info); | |
1569 | return err; | |
1570 | } | |
1571 | ||
6b172a85 | 1572 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1573 | struct snd_timer_params __user *_params) |
1da177e4 | 1574 | { |
53d2f744 TI |
1575 | struct snd_timer_user *tu; |
1576 | struct snd_timer_params params; | |
1577 | struct snd_timer *t; | |
1578 | struct snd_timer_read *tr; | |
1579 | struct snd_timer_tread *ttr; | |
1da177e4 | 1580 | int err; |
6b172a85 | 1581 | |
1da177e4 LT |
1582 | tu = file->private_data; |
1583 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1584 | t = tu->timeri->timer; | |
1585 | snd_assert(t != NULL, return -ENXIO); | |
1586 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
1587 | return -EFAULT; | |
1588 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1589 | err = -EINVAL; | |
1590 | goto _end; | |
1591 | } | |
6b172a85 CL |
1592 | if (params.queue_size > 0 && |
1593 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1594 | err = -EINVAL; |
1595 | goto _end; | |
1596 | } | |
1597 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1598 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1599 | (1<<SNDRV_TIMER_EVENT_START)| | |
1600 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1601 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1602 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1603 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1604 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1605 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1606 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1607 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1608 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1609 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1610 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1611 | err = -EINVAL; |
1612 | goto _end; | |
1613 | } | |
1614 | snd_timer_stop(tu->timeri); | |
1615 | spin_lock_irq(&t->lock); | |
1616 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1617 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1618 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1619 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1620 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1621 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1622 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1623 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1624 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1625 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1626 | if (params.queue_size > 0 && |
1627 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1628 | if (tu->tread) { |
6b172a85 CL |
1629 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1630 | GFP_KERNEL); | |
1da177e4 LT |
1631 | if (ttr) { |
1632 | kfree(tu->tqueue); | |
1633 | tu->queue_size = params.queue_size; | |
1634 | tu->tqueue = ttr; | |
1635 | } | |
1636 | } else { | |
6b172a85 CL |
1637 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1638 | GFP_KERNEL); | |
1da177e4 LT |
1639 | if (tr) { |
1640 | kfree(tu->queue); | |
1641 | tu->queue_size = params.queue_size; | |
1642 | tu->queue = tr; | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | tu->qhead = tu->qtail = tu->qused = 0; | |
1647 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1648 | if (tu->tread) { | |
53d2f744 | 1649 | struct snd_timer_tread tread; |
1da177e4 LT |
1650 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1651 | tread.tstamp.tv_sec = 0; | |
1652 | tread.tstamp.tv_nsec = 0; | |
1653 | tread.val = 0; | |
1654 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1655 | } else { | |
53d2f744 | 1656 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1657 | r->resolution = 0; |
1658 | r->ticks = 0; | |
1659 | tu->qused++; | |
1660 | tu->qtail++; | |
1661 | } | |
1da177e4 LT |
1662 | } |
1663 | tu->filter = params.filter; | |
1664 | tu->ticks = params.ticks; | |
1665 | err = 0; | |
1666 | _end: | |
1667 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1668 | return -EFAULT; | |
1669 | return err; | |
1670 | } | |
1671 | ||
6b172a85 | 1672 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1673 | struct snd_timer_status __user *_status) |
1da177e4 | 1674 | { |
53d2f744 TI |
1675 | struct snd_timer_user *tu; |
1676 | struct snd_timer_status status; | |
6b172a85 | 1677 | |
1da177e4 LT |
1678 | tu = file->private_data; |
1679 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1680 | memset(&status, 0, sizeof(status)); | |
1681 | status.tstamp = tu->tstamp; | |
1682 | status.resolution = snd_timer_resolution(tu->timeri); | |
1683 | status.lost = tu->timeri->lost; | |
1684 | status.overrun = tu->overrun; | |
1685 | spin_lock_irq(&tu->qlock); | |
1686 | status.queue = tu->qused; | |
1687 | spin_unlock_irq(&tu->qlock); | |
1688 | if (copy_to_user(_status, &status, sizeof(status))) | |
1689 | return -EFAULT; | |
1690 | return 0; | |
1691 | } | |
1692 | ||
1693 | static int snd_timer_user_start(struct file *file) | |
1694 | { | |
1695 | int err; | |
53d2f744 | 1696 | struct snd_timer_user *tu; |
6b172a85 | 1697 | |
1da177e4 LT |
1698 | tu = file->private_data; |
1699 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1700 | snd_timer_stop(tu->timeri); | |
1701 | tu->timeri->lost = 0; | |
1702 | tu->last_resolution = 0; | |
1703 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1704 | } | |
1705 | ||
1706 | static int snd_timer_user_stop(struct file *file) | |
1707 | { | |
1708 | int err; | |
53d2f744 | 1709 | struct snd_timer_user *tu; |
6b172a85 | 1710 | |
1da177e4 LT |
1711 | tu = file->private_data; |
1712 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1713 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; | |
1714 | } | |
1715 | ||
1716 | static int snd_timer_user_continue(struct file *file) | |
1717 | { | |
1718 | int err; | |
53d2f744 | 1719 | struct snd_timer_user *tu; |
6b172a85 | 1720 | |
1da177e4 LT |
1721 | tu = file->private_data; |
1722 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1723 | tu->timeri->lost = 0; | |
1724 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1725 | } | |
1726 | ||
15790a6b TI |
1727 | static int snd_timer_user_pause(struct file *file) |
1728 | { | |
1729 | int err; | |
53d2f744 | 1730 | struct snd_timer_user *tu; |
6b172a85 | 1731 | |
15790a6b TI |
1732 | tu = file->private_data; |
1733 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
d138b445 | 1734 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1735 | } |
1736 | ||
8c50b37c TI |
1737 | enum { |
1738 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1739 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1740 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1741 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1742 | }; | |
1743 | ||
6b172a85 CL |
1744 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1745 | unsigned long arg) | |
1da177e4 | 1746 | { |
53d2f744 | 1747 | struct snd_timer_user *tu; |
1da177e4 LT |
1748 | void __user *argp = (void __user *)arg; |
1749 | int __user *p = argp; | |
6b172a85 | 1750 | |
1da177e4 LT |
1751 | tu = file->private_data; |
1752 | switch (cmd) { | |
1753 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1754 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1755 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1756 | return snd_timer_user_next_device(argp); | |
1757 | case SNDRV_TIMER_IOCTL_TREAD: | |
1758 | { | |
1759 | int xarg; | |
6b172a85 | 1760 | |
1a60d4c5 | 1761 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1762 | if (tu->timeri) { /* too late */ |
1a60d4c5 | 1763 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1764 | return -EBUSY; |
c1935b4d JK |
1765 | } |
1766 | if (get_user(xarg, p)) { | |
1a60d4c5 | 1767 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1768 | return -EFAULT; |
c1935b4d | 1769 | } |
1da177e4 | 1770 | tu->tread = xarg ? 1 : 0; |
1a60d4c5 | 1771 | mutex_unlock(&tu->tread_sem); |
1da177e4 LT |
1772 | return 0; |
1773 | } | |
1774 | case SNDRV_TIMER_IOCTL_GINFO: | |
1775 | return snd_timer_user_ginfo(file, argp); | |
1776 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1777 | return snd_timer_user_gparams(file, argp); | |
1778 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1779 | return snd_timer_user_gstatus(file, argp); | |
1780 | case SNDRV_TIMER_IOCTL_SELECT: | |
1781 | return snd_timer_user_tselect(file, argp); | |
1782 | case SNDRV_TIMER_IOCTL_INFO: | |
1783 | return snd_timer_user_info(file, argp); | |
1784 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1785 | return snd_timer_user_params(file, argp); | |
1786 | case SNDRV_TIMER_IOCTL_STATUS: | |
1787 | return snd_timer_user_status(file, argp); | |
1788 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1789 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1790 | return snd_timer_user_start(file); |
1791 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1792 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1793 | return snd_timer_user_stop(file); |
1794 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1795 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1796 | return snd_timer_user_continue(file); |
15790a6b | 1797 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1798 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1799 | return snd_timer_user_pause(file); |
1da177e4 LT |
1800 | } |
1801 | return -ENOTTY; | |
1802 | } | |
1803 | ||
1804 | static int snd_timer_user_fasync(int fd, struct file * file, int on) | |
1805 | { | |
53d2f744 | 1806 | struct snd_timer_user *tu; |
1da177e4 | 1807 | int err; |
6b172a85 | 1808 | |
1da177e4 LT |
1809 | tu = file->private_data; |
1810 | err = fasync_helper(fd, file, on, &tu->fasync); | |
1811 | if (err < 0) | |
1812 | return err; | |
1813 | return 0; | |
1814 | } | |
1815 | ||
6b172a85 CL |
1816 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1817 | size_t count, loff_t *offset) | |
1da177e4 | 1818 | { |
53d2f744 | 1819 | struct snd_timer_user *tu; |
1da177e4 LT |
1820 | long result = 0, unit; |
1821 | int err = 0; | |
6b172a85 | 1822 | |
1da177e4 | 1823 | tu = file->private_data; |
53d2f744 | 1824 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1825 | spin_lock_irq(&tu->qlock); |
1826 | while ((long)count - result >= unit) { | |
1827 | while (!tu->qused) { | |
1828 | wait_queue_t wait; | |
1829 | ||
1830 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1831 | err = -EAGAIN; | |
1832 | break; | |
1833 | } | |
1834 | ||
1835 | set_current_state(TASK_INTERRUPTIBLE); | |
1836 | init_waitqueue_entry(&wait, current); | |
1837 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1838 | ||
1839 | spin_unlock_irq(&tu->qlock); | |
1840 | schedule(); | |
1841 | spin_lock_irq(&tu->qlock); | |
1842 | ||
1843 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1844 | ||
1845 | if (signal_pending(current)) { | |
1846 | err = -ERESTARTSYS; | |
1847 | break; | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | spin_unlock_irq(&tu->qlock); | |
1852 | if (err < 0) | |
1853 | goto _error; | |
1854 | ||
1855 | if (tu->tread) { | |
6b172a85 | 1856 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1857 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1858 | err = -EFAULT; |
1859 | goto _error; | |
1860 | } | |
1861 | } else { | |
6b172a85 | 1862 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1863 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1864 | err = -EFAULT; |
1865 | goto _error; | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | tu->qhead %= tu->queue_size; | |
1870 | ||
1871 | result += unit; | |
1872 | buffer += unit; | |
1873 | ||
1874 | spin_lock_irq(&tu->qlock); | |
1875 | tu->qused--; | |
1876 | } | |
1877 | spin_unlock_irq(&tu->qlock); | |
1878 | _error: | |
1879 | return result > 0 ? result : err; | |
1880 | } | |
1881 | ||
1882 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1883 | { | |
1884 | unsigned int mask; | |
53d2f744 | 1885 | struct snd_timer_user *tu; |
1da177e4 LT |
1886 | |
1887 | tu = file->private_data; | |
1888 | ||
1889 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1890 | |
1da177e4 LT |
1891 | mask = 0; |
1892 | if (tu->qused) | |
1893 | mask |= POLLIN | POLLRDNORM; | |
1894 | ||
1895 | return mask; | |
1896 | } | |
1897 | ||
1898 | #ifdef CONFIG_COMPAT | |
1899 | #include "timer_compat.c" | |
1900 | #else | |
1901 | #define snd_timer_user_ioctl_compat NULL | |
1902 | #endif | |
1903 | ||
1904 | static struct file_operations snd_timer_f_ops = | |
1905 | { | |
1906 | .owner = THIS_MODULE, | |
1907 | .read = snd_timer_user_read, | |
1908 | .open = snd_timer_user_open, | |
1909 | .release = snd_timer_user_release, | |
1910 | .poll = snd_timer_user_poll, | |
1911 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1912 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1913 | .fasync = snd_timer_user_fasync, | |
1914 | }; | |
1915 | ||
1da177e4 LT |
1916 | /* |
1917 | * ENTRY functions | |
1918 | */ | |
1919 | ||
1da177e4 LT |
1920 | static int __init alsa_timer_init(void) |
1921 | { | |
1922 | int err; | |
1da177e4 LT |
1923 | |
1924 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS | |
6b172a85 CL |
1925 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1926 | "system timer"); | |
1da177e4 | 1927 | #endif |
e28563cc | 1928 | |
1da177e4 | 1929 | if ((err = snd_timer_register_system()) < 0) |
6b172a85 CL |
1930 | snd_printk(KERN_ERR "unable to register system timer (%i)\n", |
1931 | err); | |
f87135f5 CL |
1932 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1933 | &snd_timer_f_ops, NULL, "timer")) < 0) | |
6b172a85 CL |
1934 | snd_printk(KERN_ERR "unable to register timer device (%i)\n", |
1935 | err); | |
e28563cc | 1936 | snd_timer_proc_init(); |
1da177e4 LT |
1937 | return 0; |
1938 | } | |
1939 | ||
1940 | static void __exit alsa_timer_exit(void) | |
1941 | { | |
1942 | struct list_head *p, *n; | |
1943 | ||
1944 | snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); | |
1945 | /* unregister the system timer */ | |
1946 | list_for_each_safe(p, n, &snd_timer_list) { | |
53d2f744 | 1947 | struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); |
c461482c | 1948 | snd_timer_free(timer); |
1da177e4 | 1949 | } |
e28563cc | 1950 | snd_timer_proc_done(); |
1da177e4 LT |
1951 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
1952 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
1953 | #endif | |
1954 | } | |
1955 | ||
1956 | module_init(alsa_timer_init) | |
1957 | module_exit(alsa_timer_exit) | |
1958 | ||
1959 | EXPORT_SYMBOL(snd_timer_open); | |
1960 | EXPORT_SYMBOL(snd_timer_close); | |
1961 | EXPORT_SYMBOL(snd_timer_resolution); | |
1962 | EXPORT_SYMBOL(snd_timer_start); | |
1963 | EXPORT_SYMBOL(snd_timer_stop); | |
1964 | EXPORT_SYMBOL(snd_timer_continue); | |
1965 | EXPORT_SYMBOL(snd_timer_pause); | |
1966 | EXPORT_SYMBOL(snd_timer_new); | |
1967 | EXPORT_SYMBOL(snd_timer_notify); | |
1968 | EXPORT_SYMBOL(snd_timer_global_new); | |
1969 | EXPORT_SYMBOL(snd_timer_global_free); | |
1970 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 1971 | EXPORT_SYMBOL(snd_timer_interrupt); |