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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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> | |
1da177e4 LT |
25 | #include <linux/slab.h> |
26 | #include <linux/time.h> | |
1a60d4c5 | 27 | #include <linux/mutex.h> |
1da177e4 | 28 | #include <linux/moduleparam.h> |
543537bd | 29 | #include <linux/string.h> |
1da177e4 LT |
30 | #include <sound/core.h> |
31 | #include <sound/timer.h> | |
32 | #include <sound/control.h> | |
33 | #include <sound/info.h> | |
34 | #include <sound/minors.h> | |
35 | #include <sound/initval.h> | |
36 | #include <linux/kmod.h> | |
1da177e4 LT |
37 | |
38 | #if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE) | |
39 | #define DEFAULT_TIMER_LIMIT 3 | |
40 | #elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE) | |
41 | #define DEFAULT_TIMER_LIMIT 2 | |
42 | #else | |
43 | #define DEFAULT_TIMER_LIMIT 1 | |
44 | #endif | |
45 | ||
46 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
c1017a4c | 47 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
48 | MODULE_DESCRIPTION("ALSA timer interface"); |
49 | MODULE_LICENSE("GPL"); | |
50 | module_param(timer_limit, int, 0444); | |
51 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
52 | ||
53d2f744 TI |
53 | struct snd_timer_user { |
54 | struct snd_timer_instance *timeri; | |
6b172a85 | 55 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
56 | unsigned long ticks; |
57 | unsigned long overrun; | |
58 | int qhead; | |
59 | int qtail; | |
60 | int qused; | |
61 | int queue_size; | |
53d2f744 TI |
62 | struct snd_timer_read *queue; |
63 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
64 | spinlock_t qlock; |
65 | unsigned long last_resolution; | |
66 | unsigned int filter; | |
67 | struct timespec tstamp; /* trigger tstamp */ | |
68 | wait_queue_head_t qchange_sleep; | |
69 | struct fasync_struct *fasync; | |
1a60d4c5 | 70 | struct mutex tread_sem; |
53d2f744 | 71 | }; |
1da177e4 LT |
72 | |
73 | /* list of timers */ | |
74 | static LIST_HEAD(snd_timer_list); | |
75 | ||
76 | /* list of slave instances */ | |
77 | static LIST_HEAD(snd_timer_slave_list); | |
78 | ||
79 | /* lock for slave active lists */ | |
80 | static DEFINE_SPINLOCK(slave_active_lock); | |
81 | ||
1a60d4c5 | 82 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 83 | |
53d2f744 TI |
84 | static int snd_timer_free(struct snd_timer *timer); |
85 | static int snd_timer_dev_free(struct snd_device *device); | |
86 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 87 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 88 | |
53d2f744 | 89 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
90 | |
91 | /* | |
92 | * create a timer instance with the given owner string. | |
93 | * when timer is not NULL, increments the module counter | |
94 | */ | |
53d2f744 TI |
95 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
96 | struct snd_timer *timer) | |
1da177e4 | 97 | { |
53d2f744 | 98 | struct snd_timer_instance *timeri; |
ca2c0966 | 99 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
100 | if (timeri == NULL) |
101 | return NULL; | |
543537bd | 102 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
103 | if (! timeri->owner) { |
104 | kfree(timeri); | |
105 | return NULL; | |
106 | } | |
107 | INIT_LIST_HEAD(&timeri->open_list); | |
108 | INIT_LIST_HEAD(&timeri->active_list); | |
109 | INIT_LIST_HEAD(&timeri->ack_list); | |
110 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
111 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
112 | ||
113 | timeri->timer = timer; | |
de24214d | 114 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
115 | kfree(timeri->owner); |
116 | kfree(timeri); | |
117 | return NULL; | |
118 | } | |
119 | ||
120 | return timeri; | |
121 | } | |
122 | ||
123 | /* | |
124 | * find a timer instance from the given timer id | |
125 | */ | |
53d2f744 | 126 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 127 | { |
53d2f744 | 128 | struct snd_timer *timer = NULL; |
1da177e4 | 129 | |
9244b2c3 | 130 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
131 | if (timer->tmr_class != tid->dev_class) |
132 | continue; | |
133 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
134 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
135 | (timer->card == NULL || | |
136 | timer->card->number != tid->card)) | |
137 | continue; | |
138 | if (timer->tmr_device != tid->device) | |
139 | continue; | |
140 | if (timer->tmr_subdevice != tid->subdevice) | |
141 | continue; | |
142 | return timer; | |
143 | } | |
144 | return NULL; | |
145 | } | |
146 | ||
147 | #ifdef CONFIG_KMOD | |
148 | ||
53d2f744 | 149 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 LT |
150 | { |
151 | if (! current->fs->root) | |
152 | return; | |
153 | switch (tid->dev_class) { | |
154 | case SNDRV_TIMER_CLASS_GLOBAL: | |
155 | if (tid->device < timer_limit) | |
156 | request_module("snd-timer-%i", tid->device); | |
157 | break; | |
158 | case SNDRV_TIMER_CLASS_CARD: | |
159 | case SNDRV_TIMER_CLASS_PCM: | |
160 | if (tid->card < snd_ecards_limit) | |
161 | request_module("snd-card-%i", tid->card); | |
162 | break; | |
163 | default: | |
164 | break; | |
165 | } | |
166 | } | |
167 | ||
168 | #endif | |
169 | ||
170 | /* | |
171 | * look for a master instance matching with the slave id of the given slave. | |
172 | * when found, relink the open_link of the slave. | |
173 | * | |
174 | * call this with register_mutex down. | |
175 | */ | |
53d2f744 | 176 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 177 | { |
53d2f744 TI |
178 | struct snd_timer *timer; |
179 | struct snd_timer_instance *master; | |
1da177e4 LT |
180 | |
181 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
182 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
183 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
184 | if (slave->slave_class == master->slave_class && |
185 | slave->slave_id == master->slave_id) { | |
186 | list_del(&slave->open_list); | |
6b172a85 CL |
187 | list_add_tail(&slave->open_list, |
188 | &master->slave_list_head); | |
1da177e4 LT |
189 | spin_lock_irq(&slave_active_lock); |
190 | slave->master = master; | |
191 | slave->timer = master->timer; | |
192 | spin_unlock_irq(&slave_active_lock); | |
193 | return; | |
194 | } | |
195 | } | |
196 | } | |
197 | } | |
198 | ||
199 | /* | |
200 | * look for slave instances matching with the slave id of the given master. | |
201 | * when found, relink the open_link of slaves. | |
202 | * | |
203 | * call this with register_mutex down. | |
204 | */ | |
53d2f744 | 205 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 206 | { |
9244b2c3 | 207 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
208 | |
209 | /* check all pending slaves */ | |
9244b2c3 | 210 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
211 | if (slave->slave_class == master->slave_class && |
212 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 213 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 LT |
214 | spin_lock_irq(&slave_active_lock); |
215 | slave->master = master; | |
216 | slave->timer = master->timer; | |
217 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
218 | list_add_tail(&slave->active_list, |
219 | &master->slave_active_head); | |
1da177e4 LT |
220 | spin_unlock_irq(&slave_active_lock); |
221 | } | |
222 | } | |
223 | } | |
224 | ||
225 | /* | |
226 | * open a timer instance | |
227 | * when opening a master, the slave id must be here given. | |
228 | */ | |
53d2f744 TI |
229 | int snd_timer_open(struct snd_timer_instance **ti, |
230 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
231 | unsigned int slave_id) |
232 | { | |
53d2f744 TI |
233 | struct snd_timer *timer; |
234 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 235 | |
1da177e4 LT |
236 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
237 | /* open a slave instance */ | |
238 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
239 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
240 | snd_printd("invalid slave class %i\n", tid->dev_sclass); | |
241 | return -EINVAL; | |
242 | } | |
1a60d4c5 | 243 | mutex_lock(®ister_mutex); |
1da177e4 | 244 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 245 | if (!timeri) { |
1a60d4c5 | 246 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
247 | return -ENOMEM; |
248 | } | |
1da177e4 LT |
249 | timeri->slave_class = tid->dev_sclass; |
250 | timeri->slave_id = tid->device; | |
251 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
252 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
253 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 254 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
255 | *ti = timeri; |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* open a master instance */ | |
1a60d4c5 | 260 | mutex_lock(®ister_mutex); |
1da177e4 LT |
261 | timer = snd_timer_find(tid); |
262 | #ifdef CONFIG_KMOD | |
263 | if (timer == NULL) { | |
1a60d4c5 | 264 | mutex_unlock(®ister_mutex); |
1da177e4 | 265 | snd_timer_request(tid); |
1a60d4c5 | 266 | mutex_lock(®ister_mutex); |
1da177e4 LT |
267 | timer = snd_timer_find(tid); |
268 | } | |
269 | #endif | |
2fd43d11 | 270 | if (!timer) { |
1a60d4c5 | 271 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
272 | return -ENODEV; |
273 | } | |
2fd43d11 CL |
274 | if (!list_empty(&timer->open_list_head)) { |
275 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 276 | struct snd_timer_instance, open_list); |
2fd43d11 | 277 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 278 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
279 | return -EBUSY; |
280 | } | |
281 | } | |
282 | timeri = snd_timer_instance_new(owner, timer); | |
283 | if (!timeri) { | |
1a60d4c5 | 284 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
285 | return -ENOMEM; |
286 | } | |
287 | timeri->slave_class = tid->dev_sclass; | |
288 | timeri->slave_id = slave_id; | |
289 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
290 | timer->hw.open(timer); | |
291 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
292 | snd_timer_check_master(timeri); | |
1a60d4c5 | 293 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
294 | *ti = timeri; |
295 | return 0; | |
296 | } | |
297 | ||
53d2f744 TI |
298 | static int _snd_timer_stop(struct snd_timer_instance *timeri, |
299 | int keep_flag, int event); | |
1da177e4 LT |
300 | |
301 | /* | |
302 | * close a timer instance | |
303 | */ | |
53d2f744 | 304 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 305 | { |
53d2f744 | 306 | struct snd_timer *timer = NULL; |
9244b2c3 | 307 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
308 | |
309 | snd_assert(timeri != NULL, return -ENXIO); | |
310 | ||
311 | /* force to stop the timer */ | |
312 | snd_timer_stop(timeri); | |
313 | ||
314 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
315 | /* wait, until the active callback is finished */ | |
316 | spin_lock_irq(&slave_active_lock); | |
317 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
318 | spin_unlock_irq(&slave_active_lock); | |
319 | udelay(10); | |
320 | spin_lock_irq(&slave_active_lock); | |
321 | } | |
322 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 323 | mutex_lock(®ister_mutex); |
1da177e4 | 324 | list_del(&timeri->open_list); |
1a60d4c5 | 325 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
326 | } else { |
327 | timer = timeri->timer; | |
328 | /* wait, until the active callback is finished */ | |
329 | spin_lock_irq(&timer->lock); | |
330 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
331 | spin_unlock_irq(&timer->lock); | |
332 | udelay(10); | |
333 | spin_lock_irq(&timer->lock); | |
334 | } | |
335 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 336 | mutex_lock(®ister_mutex); |
1da177e4 | 337 | list_del(&timeri->open_list); |
6b172a85 CL |
338 | if (timer && list_empty(&timer->open_list_head) && |
339 | timer->hw.close) | |
1da177e4 LT |
340 | timer->hw.close(timer); |
341 | /* remove slave links */ | |
9244b2c3 JB |
342 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
343 | open_list) { | |
1da177e4 LT |
344 | spin_lock_irq(&slave_active_lock); |
345 | _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); | |
9244b2c3 | 346 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
347 | slave->master = NULL; |
348 | slave->timer = NULL; | |
349 | spin_unlock_irq(&slave_active_lock); | |
350 | } | |
1a60d4c5 | 351 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
352 | } |
353 | if (timeri->private_free) | |
354 | timeri->private_free(timeri); | |
355 | kfree(timeri->owner); | |
356 | kfree(timeri); | |
de24214d CL |
357 | if (timer) |
358 | module_put(timer->module); | |
1da177e4 LT |
359 | return 0; |
360 | } | |
361 | ||
53d2f744 | 362 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 363 | { |
53d2f744 | 364 | struct snd_timer * timer; |
1da177e4 LT |
365 | |
366 | if (timeri == NULL) | |
367 | return 0; | |
368 | if ((timer = timeri->timer) != NULL) { | |
369 | if (timer->hw.c_resolution) | |
370 | return timer->hw.c_resolution(timer); | |
371 | return timer->hw.resolution; | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
53d2f744 | 376 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 377 | { |
53d2f744 | 378 | struct snd_timer *timer; |
1da177e4 LT |
379 | unsigned long flags; |
380 | unsigned long resolution = 0; | |
53d2f744 | 381 | struct snd_timer_instance *ts; |
1da177e4 LT |
382 | struct timespec tstamp; |
383 | ||
07799e75 | 384 | getnstimeofday(&tstamp); |
6b172a85 CL |
385 | snd_assert(event >= SNDRV_TIMER_EVENT_START && |
386 | event <= SNDRV_TIMER_EVENT_PAUSE, return); | |
387 | if (event == SNDRV_TIMER_EVENT_START || | |
388 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
389 | resolution = snd_timer_resolution(ti); |
390 | if (ti->ccallback) | |
391 | ti->ccallback(ti, SNDRV_TIMER_EVENT_START, &tstamp, resolution); | |
392 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) | |
393 | return; | |
394 | timer = ti->timer; | |
395 | if (timer == NULL) | |
396 | return; | |
397 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
398 | return; | |
399 | spin_lock_irqsave(&timer->lock, flags); | |
9244b2c3 | 400 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
401 | if (ts->ccallback) |
402 | ts->ccallback(ti, event + 100, &tstamp, resolution); | |
1da177e4 LT |
403 | spin_unlock_irqrestore(&timer->lock, flags); |
404 | } | |
405 | ||
53d2f744 | 406 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
6b172a85 | 407 | unsigned long sticks) |
1da177e4 LT |
408 | { |
409 | list_del(&timeri->active_list); | |
410 | list_add_tail(&timeri->active_list, &timer->active_list_head); | |
411 | if (timer->running) { | |
412 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
413 | goto __start_now; | |
414 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
415 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
416 | return 1; /* delayed start */ | |
417 | } else { | |
418 | timer->sticks = sticks; | |
419 | timer->hw.start(timer); | |
420 | __start_now: | |
421 | timer->running++; | |
422 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
423 | return 0; | |
424 | } | |
425 | } | |
426 | ||
53d2f744 | 427 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
1da177e4 LT |
428 | { |
429 | unsigned long flags; | |
430 | ||
431 | spin_lock_irqsave(&slave_active_lock, flags); | |
432 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
433 | if (timeri->master) | |
6b172a85 CL |
434 | list_add_tail(&timeri->active_list, |
435 | &timeri->master->slave_active_head); | |
1da177e4 LT |
436 | spin_unlock_irqrestore(&slave_active_lock, flags); |
437 | return 1; /* delayed start */ | |
438 | } | |
439 | ||
440 | /* | |
441 | * start the timer instance | |
6b172a85 | 442 | */ |
53d2f744 | 443 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
1da177e4 | 444 | { |
53d2f744 | 445 | struct snd_timer *timer; |
1da177e4 LT |
446 | int result = -EINVAL; |
447 | unsigned long flags; | |
448 | ||
449 | if (timeri == NULL || ticks < 1) | |
450 | return -EINVAL; | |
451 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
452 | result = snd_timer_start_slave(timeri); | |
453 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
454 | return result; | |
455 | } | |
456 | timer = timeri->timer; | |
457 | if (timer == NULL) | |
458 | return -EINVAL; | |
459 | spin_lock_irqsave(&timer->lock, flags); | |
460 | timeri->ticks = timeri->cticks = ticks; | |
461 | timeri->pticks = 0; | |
462 | result = snd_timer_start1(timer, timeri, ticks); | |
463 | spin_unlock_irqrestore(&timer->lock, flags); | |
464 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
465 | return result; | |
466 | } | |
467 | ||
53d2f744 TI |
468 | static int _snd_timer_stop(struct snd_timer_instance * timeri, |
469 | int keep_flag, int event) | |
1da177e4 | 470 | { |
53d2f744 | 471 | struct snd_timer *timer; |
1da177e4 LT |
472 | unsigned long flags; |
473 | ||
474 | snd_assert(timeri != NULL, return -ENXIO); | |
475 | ||
476 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
477 | if (!keep_flag) { | |
478 | spin_lock_irqsave(&slave_active_lock, flags); | |
479 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
480 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
481 | } | |
482 | goto __end; | |
483 | } | |
484 | timer = timeri->timer; | |
485 | if (!timer) | |
486 | return -EINVAL; | |
487 | spin_lock_irqsave(&timer->lock, flags); | |
488 | list_del_init(&timeri->ack_list); | |
489 | list_del_init(&timeri->active_list); | |
490 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
491 | !(--timer->running)) { | |
492 | timer->hw.stop(timer); | |
493 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
494 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
495 | snd_timer_reschedule(timer, 0); | |
496 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
497 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
498 | timer->hw.start(timer); | |
499 | } | |
500 | } | |
501 | } | |
502 | if (!keep_flag) | |
6b172a85 CL |
503 | timeri->flags &= |
504 | ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); | |
1da177e4 LT |
505 | spin_unlock_irqrestore(&timer->lock, flags); |
506 | __end: | |
507 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
508 | snd_timer_notify1(timeri, event); | |
509 | return 0; | |
510 | } | |
511 | ||
512 | /* | |
513 | * stop the timer instance. | |
514 | * | |
515 | * do not call this from the timer callback! | |
516 | */ | |
53d2f744 | 517 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 518 | { |
53d2f744 | 519 | struct snd_timer *timer; |
1da177e4 LT |
520 | unsigned long flags; |
521 | int err; | |
522 | ||
523 | err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); | |
524 | if (err < 0) | |
525 | return err; | |
526 | timer = timeri->timer; | |
527 | spin_lock_irqsave(&timer->lock, flags); | |
528 | timeri->cticks = timeri->ticks; | |
529 | timeri->pticks = 0; | |
530 | spin_unlock_irqrestore(&timer->lock, flags); | |
531 | return 0; | |
532 | } | |
533 | ||
534 | /* | |
535 | * start again.. the tick is kept. | |
536 | */ | |
53d2f744 | 537 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 538 | { |
53d2f744 | 539 | struct snd_timer *timer; |
1da177e4 LT |
540 | int result = -EINVAL; |
541 | unsigned long flags; | |
542 | ||
543 | if (timeri == NULL) | |
544 | return result; | |
545 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
546 | return snd_timer_start_slave(timeri); | |
547 | timer = timeri->timer; | |
548 | if (! timer) | |
549 | return -EINVAL; | |
550 | spin_lock_irqsave(&timer->lock, flags); | |
551 | if (!timeri->cticks) | |
552 | timeri->cticks = 1; | |
553 | timeri->pticks = 0; | |
554 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
555 | spin_unlock_irqrestore(&timer->lock, flags); | |
556 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
557 | return result; | |
558 | } | |
559 | ||
560 | /* | |
561 | * pause.. remember the ticks left | |
562 | */ | |
53d2f744 | 563 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 LT |
564 | { |
565 | return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); | |
566 | } | |
567 | ||
568 | /* | |
569 | * reschedule the timer | |
570 | * | |
571 | * start pending instances and check the scheduling ticks. | |
572 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
573 | */ | |
53d2f744 | 574 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 575 | { |
53d2f744 | 576 | struct snd_timer_instance *ti; |
1da177e4 | 577 | unsigned long ticks = ~0UL; |
1da177e4 | 578 | |
9244b2c3 | 579 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
580 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
581 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
582 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
583 | timer->running++; | |
584 | } | |
585 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
586 | if (ticks > ti->cticks) | |
587 | ticks = ti->cticks; | |
588 | } | |
589 | } | |
590 | if (ticks == ~0UL) { | |
591 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
592 | return; | |
593 | } | |
594 | if (ticks > timer->hw.ticks) | |
595 | ticks = timer->hw.ticks; | |
596 | if (ticks_left != ticks) | |
597 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
598 | timer->sticks = ticks; | |
599 | } | |
600 | ||
601 | /* | |
602 | * timer tasklet | |
603 | * | |
604 | */ | |
605 | static void snd_timer_tasklet(unsigned long arg) | |
606 | { | |
53d2f744 TI |
607 | struct snd_timer *timer = (struct snd_timer *) arg; |
608 | struct snd_timer_instance *ti; | |
1da177e4 LT |
609 | struct list_head *p; |
610 | unsigned long resolution, ticks; | |
2999ff5b | 611 | unsigned long flags; |
1da177e4 | 612 | |
2999ff5b | 613 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
614 | /* now process all callbacks */ |
615 | while (!list_empty(&timer->sack_list_head)) { | |
616 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 617 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
618 | |
619 | /* remove from ack_list and make empty */ | |
620 | list_del_init(p); | |
6b172a85 | 621 | |
1da177e4 LT |
622 | ticks = ti->pticks; |
623 | ti->pticks = 0; | |
624 | resolution = ti->resolution; | |
625 | ||
626 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
627 | spin_unlock(&timer->lock); | |
628 | if (ti->callback) | |
629 | ti->callback(ti, resolution, ticks); | |
630 | spin_lock(&timer->lock); | |
631 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
632 | } | |
2999ff5b | 633 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
634 | } |
635 | ||
636 | /* | |
637 | * timer interrupt | |
638 | * | |
639 | * ticks_left is usually equal to timer->sticks. | |
640 | * | |
641 | */ | |
53d2f744 | 642 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 643 | { |
9244b2c3 | 644 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 645 | unsigned long resolution, ticks; |
9244b2c3 | 646 | struct list_head *p, *ack_list_head; |
b32425ac | 647 | unsigned long flags; |
1da177e4 LT |
648 | int use_tasklet = 0; |
649 | ||
650 | if (timer == NULL) | |
651 | return; | |
652 | ||
b32425ac | 653 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
654 | |
655 | /* remember the current resolution */ | |
656 | if (timer->hw.c_resolution) | |
657 | resolution = timer->hw.c_resolution(timer); | |
658 | else | |
659 | resolution = timer->hw.resolution; | |
660 | ||
661 | /* loop for all active instances | |
9244b2c3 | 662 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
663 | * processed instance is relinked to done_list_head before the callback |
664 | * is called. | |
1da177e4 | 665 | */ |
9244b2c3 JB |
666 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
667 | active_list) { | |
1da177e4 LT |
668 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
669 | continue; | |
670 | ti->pticks += ticks_left; | |
671 | ti->resolution = resolution; | |
672 | if (ti->cticks < ticks_left) | |
673 | ti->cticks = 0; | |
674 | else | |
675 | ti->cticks -= ticks_left; | |
676 | if (ti->cticks) /* not expired */ | |
677 | continue; | |
678 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
679 | ti->cticks = ti->ticks; | |
680 | } else { | |
681 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
682 | if (--timer->running) | |
9244b2c3 | 683 | list_del(&ti->active_list); |
1da177e4 | 684 | } |
6b172a85 CL |
685 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
686 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
687 | ack_list_head = &timer->ack_list_head; | |
688 | else | |
689 | ack_list_head = &timer->sack_list_head; | |
690 | if (list_empty(&ti->ack_list)) | |
691 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 692 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
693 | ts->pticks = ti->pticks; |
694 | ts->resolution = resolution; | |
6b172a85 CL |
695 | if (list_empty(&ts->ack_list)) |
696 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
697 | } |
698 | } | |
699 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 700 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
701 | if (timer->running) { |
702 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
703 | timer->hw.stop(timer); | |
704 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
705 | } | |
706 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
707 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
708 | /* restart timer */ | |
709 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
710 | timer->hw.start(timer); | |
711 | } | |
712 | } else { | |
713 | timer->hw.stop(timer); | |
714 | } | |
715 | ||
716 | /* now process all fast callbacks */ | |
717 | while (!list_empty(&timer->ack_list_head)) { | |
718 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 719 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 720 | |
1da177e4 LT |
721 | /* remove from ack_list and make empty */ |
722 | list_del_init(p); | |
6b172a85 | 723 | |
1da177e4 LT |
724 | ticks = ti->pticks; |
725 | ti->pticks = 0; | |
726 | ||
727 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
728 | spin_unlock(&timer->lock); | |
729 | if (ti->callback) | |
730 | ti->callback(ti, resolution, ticks); | |
731 | spin_lock(&timer->lock); | |
732 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
733 | } | |
734 | ||
735 | /* do we have any slow callbacks? */ | |
736 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 737 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
738 | |
739 | if (use_tasklet) | |
740 | tasklet_hi_schedule(&timer->task_queue); | |
741 | } | |
742 | ||
743 | /* | |
744 | ||
745 | */ | |
746 | ||
53d2f744 TI |
747 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
748 | struct snd_timer **rtimer) | |
1da177e4 | 749 | { |
53d2f744 | 750 | struct snd_timer *timer; |
1da177e4 | 751 | int err; |
53d2f744 | 752 | static struct snd_device_ops ops = { |
1da177e4 LT |
753 | .dev_free = snd_timer_dev_free, |
754 | .dev_register = snd_timer_dev_register, | |
c461482c | 755 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
756 | }; |
757 | ||
758 | snd_assert(tid != NULL, return -EINVAL); | |
759 | snd_assert(rtimer != NULL, return -EINVAL); | |
760 | *rtimer = NULL; | |
ca2c0966 | 761 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
73e77ba0 TI |
762 | if (timer == NULL) { |
763 | snd_printk(KERN_ERR "timer: cannot allocate\n"); | |
1da177e4 | 764 | return -ENOMEM; |
73e77ba0 | 765 | } |
1da177e4 LT |
766 | timer->tmr_class = tid->dev_class; |
767 | timer->card = card; | |
768 | timer->tmr_device = tid->device; | |
769 | timer->tmr_subdevice = tid->subdevice; | |
770 | if (id) | |
771 | strlcpy(timer->id, id, sizeof(timer->id)); | |
772 | INIT_LIST_HEAD(&timer->device_list); | |
773 | INIT_LIST_HEAD(&timer->open_list_head); | |
774 | INIT_LIST_HEAD(&timer->active_list_head); | |
775 | INIT_LIST_HEAD(&timer->ack_list_head); | |
776 | INIT_LIST_HEAD(&timer->sack_list_head); | |
777 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
778 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
779 | (unsigned long)timer); | |
1da177e4 | 780 | if (card != NULL) { |
de24214d | 781 | timer->module = card->module; |
6b172a85 CL |
782 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
783 | if (err < 0) { | |
1da177e4 LT |
784 | snd_timer_free(timer); |
785 | return err; | |
786 | } | |
787 | } | |
788 | *rtimer = timer; | |
789 | return 0; | |
790 | } | |
791 | ||
53d2f744 | 792 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 LT |
793 | { |
794 | snd_assert(timer != NULL, return -ENXIO); | |
c461482c TI |
795 | |
796 | mutex_lock(®ister_mutex); | |
797 | if (! list_empty(&timer->open_list_head)) { | |
798 | struct list_head *p, *n; | |
799 | struct snd_timer_instance *ti; | |
800 | snd_printk(KERN_WARNING "timer %p is busy?\n", timer); | |
801 | list_for_each_safe(p, n, &timer->open_list_head) { | |
802 | list_del_init(p); | |
803 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
804 | ti->timer = NULL; | |
805 | } | |
806 | } | |
807 | list_del(&timer->device_list); | |
808 | mutex_unlock(®ister_mutex); | |
809 | ||
1da177e4 LT |
810 | if (timer->private_free) |
811 | timer->private_free(timer); | |
812 | kfree(timer); | |
813 | return 0; | |
814 | } | |
815 | ||
53d2f744 | 816 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 817 | { |
53d2f744 | 818 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
819 | return snd_timer_free(timer); |
820 | } | |
821 | ||
53d2f744 | 822 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 823 | { |
53d2f744 TI |
824 | struct snd_timer *timer = dev->device_data; |
825 | struct snd_timer *timer1; | |
1da177e4 | 826 | |
6b172a85 CL |
827 | snd_assert(timer != NULL && timer->hw.start != NULL && |
828 | timer->hw.stop != NULL, return -ENXIO); | |
1da177e4 LT |
829 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
830 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
831 | return -EINVAL; | |
832 | ||
1a60d4c5 | 833 | mutex_lock(®ister_mutex); |
9244b2c3 | 834 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
835 | if (timer1->tmr_class > timer->tmr_class) |
836 | break; | |
837 | if (timer1->tmr_class < timer->tmr_class) | |
838 | continue; | |
839 | if (timer1->card && timer->card) { | |
840 | if (timer1->card->number > timer->card->number) | |
841 | break; | |
842 | if (timer1->card->number < timer->card->number) | |
843 | continue; | |
844 | } | |
845 | if (timer1->tmr_device > timer->tmr_device) | |
846 | break; | |
847 | if (timer1->tmr_device < timer->tmr_device) | |
848 | continue; | |
849 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
850 | break; | |
851 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
852 | continue; | |
853 | /* conflicts.. */ | |
1a60d4c5 | 854 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
855 | return -EBUSY; |
856 | } | |
9244b2c3 | 857 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 858 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
859 | return 0; |
860 | } | |
861 | ||
c461482c | 862 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 863 | { |
c461482c | 864 | struct snd_timer *timer = device->device_data; |
1a60d4c5 | 865 | mutex_lock(®ister_mutex); |
c461482c | 866 | list_del_init(&timer->device_list); |
1a60d4c5 | 867 | mutex_unlock(®ister_mutex); |
c461482c | 868 | return 0; |
1da177e4 LT |
869 | } |
870 | ||
53d2f744 | 871 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
872 | { |
873 | unsigned long flags; | |
874 | unsigned long resolution = 0; | |
53d2f744 | 875 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 876 | |
7c22f1aa TI |
877 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
878 | return; | |
6b172a85 CL |
879 | snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && |
880 | event <= SNDRV_TIMER_EVENT_MRESUME, return); | |
1da177e4 | 881 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
882 | if (event == SNDRV_TIMER_EVENT_MSTART || |
883 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
884 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
885 | if (timer->hw.c_resolution) |
886 | resolution = timer->hw.c_resolution(timer); | |
887 | else | |
888 | resolution = timer->hw.resolution; | |
889 | } | |
9244b2c3 | 890 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
891 | if (ti->ccallback) |
892 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 893 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
894 | if (ts->ccallback) |
895 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
896 | } |
897 | spin_unlock_irqrestore(&timer->lock, flags); | |
898 | } | |
899 | ||
900 | /* | |
901 | * exported functions for global timers | |
902 | */ | |
53d2f744 | 903 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 904 | { |
53d2f744 | 905 | struct snd_timer_id tid; |
6b172a85 | 906 | |
1da177e4 LT |
907 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
908 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
909 | tid.card = -1; | |
910 | tid.device = device; | |
911 | tid.subdevice = 0; | |
912 | return snd_timer_new(NULL, id, &tid, rtimer); | |
913 | } | |
914 | ||
53d2f744 | 915 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
916 | { |
917 | return snd_timer_free(timer); | |
918 | } | |
919 | ||
53d2f744 | 920 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 921 | { |
53d2f744 | 922 | struct snd_device dev; |
1da177e4 LT |
923 | |
924 | memset(&dev, 0, sizeof(dev)); | |
925 | dev.device_data = timer; | |
926 | return snd_timer_dev_register(&dev); | |
927 | } | |
928 | ||
6b172a85 | 929 | /* |
1da177e4 LT |
930 | * System timer |
931 | */ | |
932 | ||
933 | struct snd_timer_system_private { | |
934 | struct timer_list tlist; | |
1da177e4 LT |
935 | unsigned long last_expires; |
936 | unsigned long last_jiffies; | |
937 | unsigned long correction; | |
938 | }; | |
939 | ||
1da177e4 LT |
940 | static void snd_timer_s_function(unsigned long data) |
941 | { | |
53d2f744 | 942 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
943 | struct snd_timer_system_private *priv = timer->private_data; |
944 | unsigned long jiff = jiffies; | |
945 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 946 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
947 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
948 | } | |
949 | ||
53d2f744 | 950 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
951 | { |
952 | struct snd_timer_system_private *priv; | |
953 | unsigned long njiff; | |
954 | ||
955 | priv = (struct snd_timer_system_private *) timer->private_data; | |
956 | njiff = (priv->last_jiffies = jiffies); | |
957 | if (priv->correction > timer->sticks - 1) { | |
958 | priv->correction -= timer->sticks - 1; | |
959 | njiff++; | |
960 | } else { | |
961 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 962 | priv->correction = 0; |
1da177e4 LT |
963 | } |
964 | priv->last_expires = priv->tlist.expires = njiff; | |
965 | add_timer(&priv->tlist); | |
966 | return 0; | |
967 | } | |
968 | ||
53d2f744 | 969 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
970 | { |
971 | struct snd_timer_system_private *priv; | |
972 | unsigned long jiff; | |
973 | ||
974 | priv = (struct snd_timer_system_private *) timer->private_data; | |
975 | del_timer(&priv->tlist); | |
976 | jiff = jiffies; | |
977 | if (time_before(jiff, priv->last_expires)) | |
978 | timer->sticks = priv->last_expires - jiff; | |
979 | else | |
980 | timer->sticks = 1; | |
de2696d8 | 981 | priv->correction = 0; |
1da177e4 LT |
982 | return 0; |
983 | } | |
984 | ||
53d2f744 | 985 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
986 | { |
987 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
988 | .resolution = 1000000000L / HZ, | |
989 | .ticks = 10000000L, | |
990 | .start = snd_timer_s_start, | |
991 | .stop = snd_timer_s_stop | |
992 | }; | |
993 | ||
53d2f744 | 994 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
995 | { |
996 | kfree(timer->private_data); | |
997 | } | |
998 | ||
999 | static int snd_timer_register_system(void) | |
1000 | { | |
53d2f744 | 1001 | struct snd_timer *timer; |
1da177e4 LT |
1002 | struct snd_timer_system_private *priv; |
1003 | int err; | |
1004 | ||
6b172a85 CL |
1005 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1006 | if (err < 0) | |
1da177e4 LT |
1007 | return err; |
1008 | strcpy(timer->name, "system timer"); | |
1009 | timer->hw = snd_timer_system; | |
ca2c0966 | 1010 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1011 | if (priv == NULL) { |
1012 | snd_timer_free(timer); | |
1013 | return -ENOMEM; | |
1014 | } | |
1015 | init_timer(&priv->tlist); | |
1016 | priv->tlist.function = snd_timer_s_function; | |
1017 | priv->tlist.data = (unsigned long) timer; | |
1018 | timer->private_data = priv; | |
1019 | timer->private_free = snd_timer_free_system; | |
1020 | return snd_timer_global_register(timer); | |
1021 | } | |
1022 | ||
e28563cc | 1023 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1024 | /* |
1025 | * Info interface | |
1026 | */ | |
1027 | ||
53d2f744 TI |
1028 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1029 | struct snd_info_buffer *buffer) | |
1da177e4 | 1030 | { |
53d2f744 TI |
1031 | struct snd_timer *timer; |
1032 | struct snd_timer_instance *ti; | |
1da177e4 | 1033 | |
1a60d4c5 | 1034 | mutex_lock(®ister_mutex); |
9244b2c3 | 1035 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
1036 | switch (timer->tmr_class) { |
1037 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1038 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1039 | break; | |
1040 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1041 | snd_iprintf(buffer, "C%i-%i: ", |
1042 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1043 | break; |
1044 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1045 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1046 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1047 | break; |
1048 | default: | |
6b172a85 CL |
1049 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1050 | timer->card ? timer->card->number : -1, | |
1051 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1052 | } |
1053 | snd_iprintf(buffer, "%s :", timer->name); | |
1054 | if (timer->hw.resolution) | |
6b172a85 CL |
1055 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1056 | timer->hw.resolution / 1000, | |
1057 | timer->hw.resolution % 1000, | |
1058 | timer->hw.ticks); | |
1da177e4 LT |
1059 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1060 | snd_iprintf(buffer, " SLAVE"); | |
1061 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1062 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1063 | snd_iprintf(buffer, " Client %s : %s\n", |
1064 | ti->owner ? ti->owner : "unknown", | |
1065 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1066 | SNDRV_TIMER_IFLG_RUNNING) | |
1067 | ? "running" : "stopped"); | |
1da177e4 | 1068 | } |
1a60d4c5 | 1069 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1070 | } |
1071 | ||
6581f4e7 | 1072 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1073 | |
1074 | static void __init snd_timer_proc_init(void) | |
1075 | { | |
1076 | struct snd_info_entry *entry; | |
1077 | ||
1078 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1079 | if (entry != NULL) { | |
e28563cc TI |
1080 | entry->c.text.read = snd_timer_proc_read; |
1081 | if (snd_info_register(entry) < 0) { | |
1082 | snd_info_free_entry(entry); | |
1083 | entry = NULL; | |
1084 | } | |
1085 | } | |
1086 | snd_timer_proc_entry = entry; | |
1087 | } | |
1088 | ||
1089 | static void __exit snd_timer_proc_done(void) | |
1090 | { | |
746d4a02 | 1091 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc TI |
1092 | } |
1093 | #else /* !CONFIG_PROC_FS */ | |
1094 | #define snd_timer_proc_init() | |
1095 | #define snd_timer_proc_done() | |
1096 | #endif | |
1097 | ||
1da177e4 LT |
1098 | /* |
1099 | * USER SPACE interface | |
1100 | */ | |
1101 | ||
53d2f744 | 1102 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1103 | unsigned long resolution, |
1104 | unsigned long ticks) | |
1105 | { | |
53d2f744 TI |
1106 | struct snd_timer_user *tu = timeri->callback_data; |
1107 | struct snd_timer_read *r; | |
1da177e4 | 1108 | int prev; |
6b172a85 | 1109 | |
1da177e4 LT |
1110 | spin_lock(&tu->qlock); |
1111 | if (tu->qused > 0) { | |
1112 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1113 | r = &tu->queue[prev]; | |
1114 | if (r->resolution == resolution) { | |
1115 | r->ticks += ticks; | |
1116 | goto __wake; | |
1117 | } | |
1118 | } | |
1119 | if (tu->qused >= tu->queue_size) { | |
1120 | tu->overrun++; | |
1121 | } else { | |
1122 | r = &tu->queue[tu->qtail++]; | |
1123 | tu->qtail %= tu->queue_size; | |
1124 | r->resolution = resolution; | |
1125 | r->ticks = ticks; | |
1126 | tu->qused++; | |
1127 | } | |
1128 | __wake: | |
1129 | spin_unlock(&tu->qlock); | |
1130 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1131 | wake_up(&tu->qchange_sleep); | |
1132 | } | |
1133 | ||
53d2f744 TI |
1134 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1135 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1136 | { |
1137 | if (tu->qused >= tu->queue_size) { | |
1138 | tu->overrun++; | |
1139 | } else { | |
1140 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1141 | tu->qtail %= tu->queue_size; | |
1142 | tu->qused++; | |
1143 | } | |
1144 | } | |
1145 | ||
53d2f744 TI |
1146 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1147 | int event, | |
1da177e4 LT |
1148 | struct timespec *tstamp, |
1149 | unsigned long resolution) | |
1150 | { | |
53d2f744 TI |
1151 | struct snd_timer_user *tu = timeri->callback_data; |
1152 | struct snd_timer_tread r1; | |
1da177e4 | 1153 | |
6b172a85 CL |
1154 | if (event >= SNDRV_TIMER_EVENT_START && |
1155 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1156 | tu->tstamp = *tstamp; |
1157 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1158 | return; | |
1159 | r1.event = event; | |
1160 | r1.tstamp = *tstamp; | |
1161 | r1.val = resolution; | |
1162 | spin_lock(&tu->qlock); | |
1163 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1164 | spin_unlock(&tu->qlock); | |
1165 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1166 | wake_up(&tu->qchange_sleep); | |
1167 | } | |
1168 | ||
53d2f744 | 1169 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1170 | unsigned long resolution, |
1171 | unsigned long ticks) | |
1172 | { | |
53d2f744 TI |
1173 | struct snd_timer_user *tu = timeri->callback_data; |
1174 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1175 | struct timespec tstamp; |
1176 | int prev, append = 0; | |
1177 | ||
07799e75 | 1178 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1179 | spin_lock(&tu->qlock); |
6b172a85 CL |
1180 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1181 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1182 | spin_unlock(&tu->qlock); |
1183 | return; | |
1184 | } | |
1185 | if (tu->last_resolution != resolution || ticks > 0) | |
07799e75 | 1186 | getnstimeofday(&tstamp); |
6b172a85 CL |
1187 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1188 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1189 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1190 | r1.tstamp = tstamp; | |
1191 | r1.val = resolution; | |
1192 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1193 | tu->last_resolution = resolution; | |
1194 | append++; | |
1195 | } | |
1196 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1197 | goto __wake; | |
1198 | if (ticks == 0) | |
1199 | goto __wake; | |
1200 | if (tu->qused > 0) { | |
1201 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1202 | r = &tu->tqueue[prev]; | |
1203 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1204 | r->tstamp = tstamp; | |
1205 | r->val += ticks; | |
1206 | append++; | |
1207 | goto __wake; | |
1208 | } | |
1209 | } | |
1210 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1211 | r1.tstamp = tstamp; | |
1212 | r1.val = ticks; | |
1213 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1214 | append++; | |
1215 | __wake: | |
1216 | spin_unlock(&tu->qlock); | |
1217 | if (append == 0) | |
1218 | return; | |
1219 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1220 | wake_up(&tu->qchange_sleep); | |
1221 | } | |
1222 | ||
1223 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1224 | { | |
53d2f744 | 1225 | struct snd_timer_user *tu; |
6b172a85 | 1226 | |
ca2c0966 | 1227 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1228 | if (tu == NULL) |
1229 | return -ENOMEM; | |
1230 | spin_lock_init(&tu->qlock); | |
1231 | init_waitqueue_head(&tu->qchange_sleep); | |
1a60d4c5 | 1232 | mutex_init(&tu->tread_sem); |
1da177e4 LT |
1233 | tu->ticks = 1; |
1234 | tu->queue_size = 128; | |
53d2f744 | 1235 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1236 | GFP_KERNEL); |
1da177e4 LT |
1237 | if (tu->queue == NULL) { |
1238 | kfree(tu); | |
1239 | return -ENOMEM; | |
1240 | } | |
1241 | file->private_data = tu; | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1246 | { | |
53d2f744 | 1247 | struct snd_timer_user *tu; |
1da177e4 LT |
1248 | |
1249 | if (file->private_data) { | |
1250 | tu = file->private_data; | |
1251 | file->private_data = NULL; | |
1252 | fasync_helper(-1, file, 0, &tu->fasync); | |
1253 | if (tu->timeri) | |
1254 | snd_timer_close(tu->timeri); | |
1255 | kfree(tu->queue); | |
1256 | kfree(tu->tqueue); | |
1257 | kfree(tu); | |
1258 | } | |
1259 | return 0; | |
1260 | } | |
1261 | ||
53d2f744 | 1262 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1263 | { |
1264 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1265 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1266 | id->card = -1; | |
1267 | id->device = -1; | |
1268 | id->subdevice = -1; | |
1269 | } | |
1270 | ||
53d2f744 | 1271 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1272 | { |
1273 | id->dev_class = timer->tmr_class; | |
1274 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1275 | id->card = timer->card ? timer->card->number : -1; | |
1276 | id->device = timer->tmr_device; | |
1277 | id->subdevice = timer->tmr_subdevice; | |
1278 | } | |
1279 | ||
53d2f744 | 1280 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1281 | { |
53d2f744 TI |
1282 | struct snd_timer_id id; |
1283 | struct snd_timer *timer; | |
1da177e4 | 1284 | struct list_head *p; |
6b172a85 | 1285 | |
1da177e4 LT |
1286 | if (copy_from_user(&id, _tid, sizeof(id))) |
1287 | return -EFAULT; | |
1a60d4c5 | 1288 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1289 | if (id.dev_class < 0) { /* first item */ |
1290 | if (list_empty(&snd_timer_list)) | |
1291 | snd_timer_user_zero_id(&id); | |
1292 | else { | |
9dfba380 | 1293 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1294 | struct snd_timer, device_list); |
1da177e4 LT |
1295 | snd_timer_user_copy_id(&id, timer); |
1296 | } | |
1297 | } else { | |
1298 | switch (id.dev_class) { | |
1299 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1300 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1301 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1302 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1303 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1304 | snd_timer_user_copy_id(&id, timer); | |
1305 | break; | |
1306 | } | |
1307 | if (timer->tmr_device >= id.device) { | |
1308 | snd_timer_user_copy_id(&id, timer); | |
1309 | break; | |
1310 | } | |
1311 | } | |
1312 | if (p == &snd_timer_list) | |
1313 | snd_timer_user_zero_id(&id); | |
1314 | break; | |
1315 | case SNDRV_TIMER_CLASS_CARD: | |
1316 | case SNDRV_TIMER_CLASS_PCM: | |
1317 | if (id.card < 0) { | |
1318 | id.card = 0; | |
1319 | } else { | |
1320 | if (id.card < 0) { | |
1321 | id.card = 0; | |
1322 | } else { | |
1323 | if (id.device < 0) { | |
1324 | id.device = 0; | |
1325 | } else { | |
6b172a85 CL |
1326 | if (id.subdevice < 0) { |
1327 | id.subdevice = 0; | |
1328 | } else { | |
1329 | id.subdevice++; | |
1330 | } | |
1da177e4 LT |
1331 | } |
1332 | } | |
1333 | } | |
1334 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1335 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1336 | if (timer->tmr_class > id.dev_class) { |
1337 | snd_timer_user_copy_id(&id, timer); | |
1338 | break; | |
1339 | } | |
1340 | if (timer->tmr_class < id.dev_class) | |
1341 | continue; | |
1342 | if (timer->card->number > id.card) { | |
1343 | snd_timer_user_copy_id(&id, timer); | |
1344 | break; | |
1345 | } | |
1346 | if (timer->card->number < id.card) | |
1347 | continue; | |
1348 | if (timer->tmr_device > id.device) { | |
1349 | snd_timer_user_copy_id(&id, timer); | |
1350 | break; | |
1351 | } | |
1352 | if (timer->tmr_device < id.device) | |
1353 | continue; | |
1354 | if (timer->tmr_subdevice > id.subdevice) { | |
1355 | snd_timer_user_copy_id(&id, timer); | |
1356 | break; | |
1357 | } | |
1358 | if (timer->tmr_subdevice < id.subdevice) | |
1359 | continue; | |
1360 | snd_timer_user_copy_id(&id, timer); | |
1361 | break; | |
1362 | } | |
1363 | if (p == &snd_timer_list) | |
1364 | snd_timer_user_zero_id(&id); | |
1365 | break; | |
1366 | default: | |
1367 | snd_timer_user_zero_id(&id); | |
1368 | } | |
1369 | } | |
1a60d4c5 | 1370 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1371 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1372 | return -EFAULT; | |
1373 | return 0; | |
6b172a85 | 1374 | } |
1da177e4 | 1375 | |
6b172a85 | 1376 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1377 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1378 | { |
53d2f744 TI |
1379 | struct snd_timer_ginfo *ginfo; |
1380 | struct snd_timer_id tid; | |
1381 | struct snd_timer *t; | |
1da177e4 LT |
1382 | struct list_head *p; |
1383 | int err = 0; | |
1384 | ||
1385 | ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL); | |
1386 | if (! ginfo) | |
1387 | return -ENOMEM; | |
1388 | if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) { | |
1389 | kfree(ginfo); | |
1390 | return -EFAULT; | |
1391 | } | |
1392 | tid = ginfo->tid; | |
1393 | memset(ginfo, 0, sizeof(*ginfo)); | |
1394 | ginfo->tid = tid; | |
1a60d4c5 | 1395 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1396 | t = snd_timer_find(&tid); |
1397 | if (t != NULL) { | |
1398 | ginfo->card = t->card ? t->card->number : -1; | |
1399 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1400 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1401 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1402 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1403 | ginfo->resolution = t->hw.resolution; | |
1404 | if (t->hw.resolution_min > 0) { | |
1405 | ginfo->resolution_min = t->hw.resolution_min; | |
1406 | ginfo->resolution_max = t->hw.resolution_max; | |
1407 | } | |
1408 | list_for_each(p, &t->open_list_head) { | |
1409 | ginfo->clients++; | |
1410 | } | |
1411 | } else { | |
1412 | err = -ENODEV; | |
1413 | } | |
1a60d4c5 | 1414 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1415 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1416 | err = -EFAULT; | |
1417 | kfree(ginfo); | |
1418 | return err; | |
1419 | } | |
1420 | ||
6b172a85 | 1421 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1422 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1423 | { |
53d2f744 TI |
1424 | struct snd_timer_gparams gparams; |
1425 | struct snd_timer *t; | |
1da177e4 LT |
1426 | int err; |
1427 | ||
1428 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1429 | return -EFAULT; | |
1a60d4c5 | 1430 | mutex_lock(®ister_mutex); |
1da177e4 | 1431 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1432 | if (!t) { |
1da177e4 | 1433 | err = -ENODEV; |
6b172a85 CL |
1434 | goto _error; |
1435 | } | |
1436 | if (!list_empty(&t->open_list_head)) { | |
1437 | err = -EBUSY; | |
1438 | goto _error; | |
1439 | } | |
1440 | if (!t->hw.set_period) { | |
1441 | err = -ENOSYS; | |
1442 | goto _error; | |
1da177e4 | 1443 | } |
6b172a85 CL |
1444 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1445 | _error: | |
1a60d4c5 | 1446 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1447 | return err; |
1448 | } | |
1449 | ||
6b172a85 | 1450 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1451 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1452 | { |
53d2f744 TI |
1453 | struct snd_timer_gstatus gstatus; |
1454 | struct snd_timer_id tid; | |
1455 | struct snd_timer *t; | |
1da177e4 LT |
1456 | int err = 0; |
1457 | ||
1458 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1459 | return -EFAULT; | |
1460 | tid = gstatus.tid; | |
1461 | memset(&gstatus, 0, sizeof(gstatus)); | |
1462 | gstatus.tid = tid; | |
1a60d4c5 | 1463 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1464 | t = snd_timer_find(&tid); |
1465 | if (t != NULL) { | |
1466 | if (t->hw.c_resolution) | |
1467 | gstatus.resolution = t->hw.c_resolution(t); | |
1468 | else | |
1469 | gstatus.resolution = t->hw.resolution; | |
1470 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1471 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1472 | &gstatus.resolution_den); | |
1da177e4 LT |
1473 | } else { |
1474 | gstatus.resolution_num = gstatus.resolution; | |
1475 | gstatus.resolution_den = 1000000000uL; | |
1476 | } | |
1477 | } else { | |
1478 | err = -ENODEV; | |
1479 | } | |
1a60d4c5 | 1480 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1481 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1482 | err = -EFAULT; | |
1483 | return err; | |
1484 | } | |
1485 | ||
6b172a85 | 1486 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1487 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1488 | { |
53d2f744 TI |
1489 | struct snd_timer_user *tu; |
1490 | struct snd_timer_select tselect; | |
1da177e4 | 1491 | char str[32]; |
c1935b4d | 1492 | int err = 0; |
6b172a85 | 1493 | |
1da177e4 | 1494 | tu = file->private_data; |
1a60d4c5 | 1495 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1496 | if (tu->timeri) { |
1da177e4 | 1497 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1498 | tu->timeri = NULL; |
1499 | } | |
1500 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1501 | err = -EFAULT; | |
1502 | goto __err; | |
1503 | } | |
1da177e4 LT |
1504 | sprintf(str, "application %i", current->pid); |
1505 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1506 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1507 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1508 | if (err < 0) | |
c1935b4d | 1509 | goto __err; |
1da177e4 | 1510 | |
4d572776 JJ |
1511 | kfree(tu->queue); |
1512 | tu->queue = NULL; | |
1513 | kfree(tu->tqueue); | |
1514 | tu->tqueue = NULL; | |
1da177e4 | 1515 | if (tu->tread) { |
53d2f744 | 1516 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1517 | GFP_KERNEL); |
c1935b4d JK |
1518 | if (tu->tqueue == NULL) |
1519 | err = -ENOMEM; | |
1da177e4 | 1520 | } else { |
53d2f744 | 1521 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1522 | GFP_KERNEL); |
c1935b4d JK |
1523 | if (tu->queue == NULL) |
1524 | err = -ENOMEM; | |
1da177e4 | 1525 | } |
6b172a85 | 1526 | |
c1935b4d JK |
1527 | if (err < 0) { |
1528 | snd_timer_close(tu->timeri); | |
1529 | tu->timeri = NULL; | |
1530 | } else { | |
1531 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1532 | tu->timeri->callback = tu->tread |
1533 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1534 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1535 | tu->timeri->callback_data = (void *)tu; | |
1536 | } | |
1537 | ||
1538 | __err: | |
1a60d4c5 | 1539 | mutex_unlock(&tu->tread_sem); |
c1935b4d | 1540 | return err; |
1da177e4 LT |
1541 | } |
1542 | ||
6b172a85 | 1543 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1544 | struct snd_timer_info __user *_info) |
1da177e4 | 1545 | { |
53d2f744 TI |
1546 | struct snd_timer_user *tu; |
1547 | struct snd_timer_info *info; | |
1548 | struct snd_timer *t; | |
1da177e4 LT |
1549 | int err = 0; |
1550 | ||
1551 | tu = file->private_data; | |
7c64ec34 CL |
1552 | if (!tu->timeri) |
1553 | return -EBADFD; | |
1da177e4 | 1554 | t = tu->timeri->timer; |
7c64ec34 CL |
1555 | if (!t) |
1556 | return -EBADFD; | |
1da177e4 | 1557 | |
ca2c0966 | 1558 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1559 | if (! info) |
1560 | return -ENOMEM; | |
1561 | info->card = t->card ? t->card->number : -1; | |
1562 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1563 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1564 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1565 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1566 | info->resolution = t->hw.resolution; | |
1567 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1568 | err = -EFAULT; | |
1569 | kfree(info); | |
1570 | return err; | |
1571 | } | |
1572 | ||
6b172a85 | 1573 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1574 | struct snd_timer_params __user *_params) |
1da177e4 | 1575 | { |
53d2f744 TI |
1576 | struct snd_timer_user *tu; |
1577 | struct snd_timer_params params; | |
1578 | struct snd_timer *t; | |
1579 | struct snd_timer_read *tr; | |
1580 | struct snd_timer_tread *ttr; | |
1da177e4 | 1581 | int err; |
6b172a85 | 1582 | |
1da177e4 | 1583 | tu = file->private_data; |
7c64ec34 CL |
1584 | if (!tu->timeri) |
1585 | return -EBADFD; | |
1da177e4 | 1586 | t = tu->timeri->timer; |
7c64ec34 CL |
1587 | if (!t) |
1588 | return -EBADFD; | |
1da177e4 LT |
1589 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1590 | return -EFAULT; | |
1591 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1592 | err = -EINVAL; | |
1593 | goto _end; | |
1594 | } | |
6b172a85 CL |
1595 | if (params.queue_size > 0 && |
1596 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1597 | err = -EINVAL; |
1598 | goto _end; | |
1599 | } | |
1600 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1601 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1602 | (1<<SNDRV_TIMER_EVENT_START)| | |
1603 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1604 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1605 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1606 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1607 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1608 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1609 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1610 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1611 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1612 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1613 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1614 | err = -EINVAL; |
1615 | goto _end; | |
1616 | } | |
1617 | snd_timer_stop(tu->timeri); | |
1618 | spin_lock_irq(&t->lock); | |
1619 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1620 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1621 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1622 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1623 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1624 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1625 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1626 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1627 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1628 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1629 | if (params.queue_size > 0 && |
1630 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1631 | if (tu->tread) { |
6b172a85 CL |
1632 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1633 | GFP_KERNEL); | |
1da177e4 LT |
1634 | if (ttr) { |
1635 | kfree(tu->tqueue); | |
1636 | tu->queue_size = params.queue_size; | |
1637 | tu->tqueue = ttr; | |
1638 | } | |
1639 | } else { | |
6b172a85 CL |
1640 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1641 | GFP_KERNEL); | |
1da177e4 LT |
1642 | if (tr) { |
1643 | kfree(tu->queue); | |
1644 | tu->queue_size = params.queue_size; | |
1645 | tu->queue = tr; | |
1646 | } | |
1647 | } | |
1648 | } | |
1649 | tu->qhead = tu->qtail = tu->qused = 0; | |
1650 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1651 | if (tu->tread) { | |
53d2f744 | 1652 | struct snd_timer_tread tread; |
1da177e4 LT |
1653 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1654 | tread.tstamp.tv_sec = 0; | |
1655 | tread.tstamp.tv_nsec = 0; | |
1656 | tread.val = 0; | |
1657 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1658 | } else { | |
53d2f744 | 1659 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1660 | r->resolution = 0; |
1661 | r->ticks = 0; | |
1662 | tu->qused++; | |
1663 | tu->qtail++; | |
1664 | } | |
1da177e4 LT |
1665 | } |
1666 | tu->filter = params.filter; | |
1667 | tu->ticks = params.ticks; | |
1668 | err = 0; | |
1669 | _end: | |
1670 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1671 | return -EFAULT; | |
1672 | return err; | |
1673 | } | |
1674 | ||
6b172a85 | 1675 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1676 | struct snd_timer_status __user *_status) |
1da177e4 | 1677 | { |
53d2f744 TI |
1678 | struct snd_timer_user *tu; |
1679 | struct snd_timer_status status; | |
6b172a85 | 1680 | |
1da177e4 | 1681 | tu = file->private_data; |
7c64ec34 CL |
1682 | if (!tu->timeri) |
1683 | return -EBADFD; | |
1da177e4 LT |
1684 | memset(&status, 0, sizeof(status)); |
1685 | status.tstamp = tu->tstamp; | |
1686 | status.resolution = snd_timer_resolution(tu->timeri); | |
1687 | status.lost = tu->timeri->lost; | |
1688 | status.overrun = tu->overrun; | |
1689 | spin_lock_irq(&tu->qlock); | |
1690 | status.queue = tu->qused; | |
1691 | spin_unlock_irq(&tu->qlock); | |
1692 | if (copy_to_user(_status, &status, sizeof(status))) | |
1693 | return -EFAULT; | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | static int snd_timer_user_start(struct file *file) | |
1698 | { | |
1699 | int err; | |
53d2f744 | 1700 | struct snd_timer_user *tu; |
6b172a85 | 1701 | |
1da177e4 | 1702 | tu = file->private_data; |
7c64ec34 CL |
1703 | if (!tu->timeri) |
1704 | return -EBADFD; | |
1da177e4 LT |
1705 | snd_timer_stop(tu->timeri); |
1706 | tu->timeri->lost = 0; | |
1707 | tu->last_resolution = 0; | |
1708 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1709 | } | |
1710 | ||
1711 | static int snd_timer_user_stop(struct file *file) | |
1712 | { | |
1713 | int err; | |
53d2f744 | 1714 | struct snd_timer_user *tu; |
6b172a85 | 1715 | |
1da177e4 | 1716 | tu = file->private_data; |
7c64ec34 CL |
1717 | if (!tu->timeri) |
1718 | return -EBADFD; | |
1da177e4 LT |
1719 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1720 | } | |
1721 | ||
1722 | static int snd_timer_user_continue(struct file *file) | |
1723 | { | |
1724 | int err; | |
53d2f744 | 1725 | struct snd_timer_user *tu; |
6b172a85 | 1726 | |
1da177e4 | 1727 | tu = file->private_data; |
7c64ec34 CL |
1728 | if (!tu->timeri) |
1729 | return -EBADFD; | |
1da177e4 LT |
1730 | tu->timeri->lost = 0; |
1731 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1732 | } | |
1733 | ||
15790a6b TI |
1734 | static int snd_timer_user_pause(struct file *file) |
1735 | { | |
1736 | int err; | |
53d2f744 | 1737 | struct snd_timer_user *tu; |
6b172a85 | 1738 | |
15790a6b | 1739 | tu = file->private_data; |
7c64ec34 CL |
1740 | if (!tu->timeri) |
1741 | return -EBADFD; | |
d138b445 | 1742 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1743 | } |
1744 | ||
8c50b37c TI |
1745 | enum { |
1746 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1747 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1748 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1749 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1750 | }; | |
1751 | ||
6b172a85 CL |
1752 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1753 | unsigned long arg) | |
1da177e4 | 1754 | { |
53d2f744 | 1755 | struct snd_timer_user *tu; |
1da177e4 LT |
1756 | void __user *argp = (void __user *)arg; |
1757 | int __user *p = argp; | |
6b172a85 | 1758 | |
1da177e4 LT |
1759 | tu = file->private_data; |
1760 | switch (cmd) { | |
1761 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1762 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1763 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1764 | return snd_timer_user_next_device(argp); | |
1765 | case SNDRV_TIMER_IOCTL_TREAD: | |
1766 | { | |
1767 | int xarg; | |
6b172a85 | 1768 | |
1a60d4c5 | 1769 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1770 | if (tu->timeri) { /* too late */ |
1a60d4c5 | 1771 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1772 | return -EBUSY; |
c1935b4d JK |
1773 | } |
1774 | if (get_user(xarg, p)) { | |
1a60d4c5 | 1775 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1776 | return -EFAULT; |
c1935b4d | 1777 | } |
1da177e4 | 1778 | tu->tread = xarg ? 1 : 0; |
1a60d4c5 | 1779 | mutex_unlock(&tu->tread_sem); |
1da177e4 LT |
1780 | return 0; |
1781 | } | |
1782 | case SNDRV_TIMER_IOCTL_GINFO: | |
1783 | return snd_timer_user_ginfo(file, argp); | |
1784 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1785 | return snd_timer_user_gparams(file, argp); | |
1786 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1787 | return snd_timer_user_gstatus(file, argp); | |
1788 | case SNDRV_TIMER_IOCTL_SELECT: | |
1789 | return snd_timer_user_tselect(file, argp); | |
1790 | case SNDRV_TIMER_IOCTL_INFO: | |
1791 | return snd_timer_user_info(file, argp); | |
1792 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1793 | return snd_timer_user_params(file, argp); | |
1794 | case SNDRV_TIMER_IOCTL_STATUS: | |
1795 | return snd_timer_user_status(file, argp); | |
1796 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1797 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1798 | return snd_timer_user_start(file); |
1799 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1800 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1801 | return snd_timer_user_stop(file); |
1802 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1803 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1804 | return snd_timer_user_continue(file); |
15790a6b | 1805 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1806 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1807 | return snd_timer_user_pause(file); |
1da177e4 LT |
1808 | } |
1809 | return -ENOTTY; | |
1810 | } | |
1811 | ||
1812 | static int snd_timer_user_fasync(int fd, struct file * file, int on) | |
1813 | { | |
53d2f744 | 1814 | struct snd_timer_user *tu; |
1da177e4 | 1815 | int err; |
6b172a85 | 1816 | |
1da177e4 LT |
1817 | tu = file->private_data; |
1818 | err = fasync_helper(fd, file, on, &tu->fasync); | |
1819 | if (err < 0) | |
1820 | return err; | |
1821 | return 0; | |
1822 | } | |
1823 | ||
6b172a85 CL |
1824 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1825 | size_t count, loff_t *offset) | |
1da177e4 | 1826 | { |
53d2f744 | 1827 | struct snd_timer_user *tu; |
1da177e4 LT |
1828 | long result = 0, unit; |
1829 | int err = 0; | |
6b172a85 | 1830 | |
1da177e4 | 1831 | tu = file->private_data; |
53d2f744 | 1832 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1833 | spin_lock_irq(&tu->qlock); |
1834 | while ((long)count - result >= unit) { | |
1835 | while (!tu->qused) { | |
1836 | wait_queue_t wait; | |
1837 | ||
1838 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1839 | err = -EAGAIN; | |
1840 | break; | |
1841 | } | |
1842 | ||
1843 | set_current_state(TASK_INTERRUPTIBLE); | |
1844 | init_waitqueue_entry(&wait, current); | |
1845 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1846 | ||
1847 | spin_unlock_irq(&tu->qlock); | |
1848 | schedule(); | |
1849 | spin_lock_irq(&tu->qlock); | |
1850 | ||
1851 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1852 | ||
1853 | if (signal_pending(current)) { | |
1854 | err = -ERESTARTSYS; | |
1855 | break; | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | spin_unlock_irq(&tu->qlock); | |
1860 | if (err < 0) | |
1861 | goto _error; | |
1862 | ||
1863 | if (tu->tread) { | |
6b172a85 | 1864 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1865 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1866 | err = -EFAULT; |
1867 | goto _error; | |
1868 | } | |
1869 | } else { | |
6b172a85 | 1870 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1871 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1872 | err = -EFAULT; |
1873 | goto _error; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | tu->qhead %= tu->queue_size; | |
1878 | ||
1879 | result += unit; | |
1880 | buffer += unit; | |
1881 | ||
1882 | spin_lock_irq(&tu->qlock); | |
1883 | tu->qused--; | |
1884 | } | |
1885 | spin_unlock_irq(&tu->qlock); | |
1886 | _error: | |
1887 | return result > 0 ? result : err; | |
1888 | } | |
1889 | ||
1890 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1891 | { | |
1892 | unsigned int mask; | |
53d2f744 | 1893 | struct snd_timer_user *tu; |
1da177e4 LT |
1894 | |
1895 | tu = file->private_data; | |
1896 | ||
1897 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1898 | |
1da177e4 LT |
1899 | mask = 0; |
1900 | if (tu->qused) | |
1901 | mask |= POLLIN | POLLRDNORM; | |
1902 | ||
1903 | return mask; | |
1904 | } | |
1905 | ||
1906 | #ifdef CONFIG_COMPAT | |
1907 | #include "timer_compat.c" | |
1908 | #else | |
1909 | #define snd_timer_user_ioctl_compat NULL | |
1910 | #endif | |
1911 | ||
9c2e08c5 | 1912 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
1913 | { |
1914 | .owner = THIS_MODULE, | |
1915 | .read = snd_timer_user_read, | |
1916 | .open = snd_timer_user_open, | |
1917 | .release = snd_timer_user_release, | |
1918 | .poll = snd_timer_user_poll, | |
1919 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1920 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1921 | .fasync = snd_timer_user_fasync, | |
1922 | }; | |
1923 | ||
1da177e4 LT |
1924 | /* |
1925 | * ENTRY functions | |
1926 | */ | |
1927 | ||
1da177e4 LT |
1928 | static int __init alsa_timer_init(void) |
1929 | { | |
1930 | int err; | |
1da177e4 LT |
1931 | |
1932 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS | |
6b172a85 CL |
1933 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1934 | "system timer"); | |
1da177e4 | 1935 | #endif |
e28563cc | 1936 | |
1da177e4 | 1937 | if ((err = snd_timer_register_system()) < 0) |
6b172a85 CL |
1938 | snd_printk(KERN_ERR "unable to register system timer (%i)\n", |
1939 | err); | |
f87135f5 CL |
1940 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1941 | &snd_timer_f_ops, NULL, "timer")) < 0) | |
6b172a85 CL |
1942 | snd_printk(KERN_ERR "unable to register timer device (%i)\n", |
1943 | err); | |
e28563cc | 1944 | snd_timer_proc_init(); |
1da177e4 LT |
1945 | return 0; |
1946 | } | |
1947 | ||
1948 | static void __exit alsa_timer_exit(void) | |
1949 | { | |
1950 | struct list_head *p, *n; | |
1951 | ||
1952 | snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); | |
1953 | /* unregister the system timer */ | |
1954 | list_for_each_safe(p, n, &snd_timer_list) { | |
53d2f744 | 1955 | struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); |
c461482c | 1956 | snd_timer_free(timer); |
1da177e4 | 1957 | } |
e28563cc | 1958 | snd_timer_proc_done(); |
1da177e4 LT |
1959 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
1960 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
1961 | #endif | |
1962 | } | |
1963 | ||
1964 | module_init(alsa_timer_init) | |
1965 | module_exit(alsa_timer_exit) | |
1966 | ||
1967 | EXPORT_SYMBOL(snd_timer_open); | |
1968 | EXPORT_SYMBOL(snd_timer_close); | |
1969 | EXPORT_SYMBOL(snd_timer_resolution); | |
1970 | EXPORT_SYMBOL(snd_timer_start); | |
1971 | EXPORT_SYMBOL(snd_timer_stop); | |
1972 | EXPORT_SYMBOL(snd_timer_continue); | |
1973 | EXPORT_SYMBOL(snd_timer_pause); | |
1974 | EXPORT_SYMBOL(snd_timer_new); | |
1975 | EXPORT_SYMBOL(snd_timer_notify); | |
1976 | EXPORT_SYMBOL(snd_timer_global_new); | |
1977 | EXPORT_SYMBOL(snd_timer_global_free); | |
1978 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 1979 | EXPORT_SYMBOL(snd_timer_interrupt); |