]>
Commit | Line | Data |
---|---|---|
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 | ||
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/init.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
1da177e4 | 27 | #include <linux/moduleparam.h> |
543537bd | 28 | #include <linux/string.h> |
1da177e4 LT |
29 | #include <sound/core.h> |
30 | #include <sound/timer.h> | |
31 | #include <sound/control.h> | |
32 | #include <sound/info.h> | |
33 | #include <sound/minors.h> | |
34 | #include <sound/initval.h> | |
35 | #include <linux/kmod.h> | |
1da177e4 LT |
36 | |
37 | #if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE) | |
38 | #define DEFAULT_TIMER_LIMIT 3 | |
39 | #elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE) | |
40 | #define DEFAULT_TIMER_LIMIT 2 | |
41 | #else | |
42 | #define DEFAULT_TIMER_LIMIT 1 | |
43 | #endif | |
44 | ||
45 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 46 | static int timer_tstamp_monotonic = 1; |
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."); | |
b751eef1 JK |
52 | module_param(timer_tstamp_monotonic, int, 0444); |
53 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 54 | |
53d2f744 TI |
55 | struct snd_timer_user { |
56 | struct snd_timer_instance *timeri; | |
6b172a85 | 57 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
58 | unsigned long ticks; |
59 | unsigned long overrun; | |
60 | int qhead; | |
61 | int qtail; | |
62 | int qused; | |
63 | int queue_size; | |
53d2f744 TI |
64 | struct snd_timer_read *queue; |
65 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
66 | spinlock_t qlock; |
67 | unsigned long last_resolution; | |
68 | unsigned int filter; | |
69 | struct timespec tstamp; /* trigger tstamp */ | |
70 | wait_queue_head_t qchange_sleep; | |
71 | struct fasync_struct *fasync; | |
1a60d4c5 | 72 | struct mutex tread_sem; |
53d2f744 | 73 | }; |
1da177e4 LT |
74 | |
75 | /* list of timers */ | |
76 | static LIST_HEAD(snd_timer_list); | |
77 | ||
78 | /* list of slave instances */ | |
79 | static LIST_HEAD(snd_timer_slave_list); | |
80 | ||
81 | /* lock for slave active lists */ | |
82 | static DEFINE_SPINLOCK(slave_active_lock); | |
83 | ||
1a60d4c5 | 84 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 85 | |
53d2f744 TI |
86 | static int snd_timer_free(struct snd_timer *timer); |
87 | static int snd_timer_dev_free(struct snd_device *device); | |
88 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 89 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 90 | |
53d2f744 | 91 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
92 | |
93 | /* | |
94 | * create a timer instance with the given owner string. | |
95 | * when timer is not NULL, increments the module counter | |
96 | */ | |
53d2f744 TI |
97 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
98 | struct snd_timer *timer) | |
1da177e4 | 99 | { |
53d2f744 | 100 | struct snd_timer_instance *timeri; |
ca2c0966 | 101 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
102 | if (timeri == NULL) |
103 | return NULL; | |
543537bd | 104 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
105 | if (! timeri->owner) { |
106 | kfree(timeri); | |
107 | return NULL; | |
108 | } | |
109 | INIT_LIST_HEAD(&timeri->open_list); | |
110 | INIT_LIST_HEAD(&timeri->active_list); | |
111 | INIT_LIST_HEAD(&timeri->ack_list); | |
112 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
113 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
114 | ||
115 | timeri->timer = timer; | |
de24214d | 116 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
117 | kfree(timeri->owner); |
118 | kfree(timeri); | |
119 | return NULL; | |
120 | } | |
121 | ||
122 | return timeri; | |
123 | } | |
124 | ||
125 | /* | |
126 | * find a timer instance from the given timer id | |
127 | */ | |
53d2f744 | 128 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 129 | { |
53d2f744 | 130 | struct snd_timer *timer = NULL; |
1da177e4 | 131 | |
9244b2c3 | 132 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
133 | if (timer->tmr_class != tid->dev_class) |
134 | continue; | |
135 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
136 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
137 | (timer->card == NULL || | |
138 | timer->card->number != tid->card)) | |
139 | continue; | |
140 | if (timer->tmr_device != tid->device) | |
141 | continue; | |
142 | if (timer->tmr_subdevice != tid->subdevice) | |
143 | continue; | |
144 | return timer; | |
145 | } | |
146 | return NULL; | |
147 | } | |
148 | ||
149 | #ifdef CONFIG_KMOD | |
150 | ||
53d2f744 | 151 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 LT |
152 | { |
153 | if (! current->fs->root) | |
154 | return; | |
155 | switch (tid->dev_class) { | |
156 | case SNDRV_TIMER_CLASS_GLOBAL: | |
157 | if (tid->device < timer_limit) | |
158 | request_module("snd-timer-%i", tid->device); | |
159 | break; | |
160 | case SNDRV_TIMER_CLASS_CARD: | |
161 | case SNDRV_TIMER_CLASS_PCM: | |
162 | if (tid->card < snd_ecards_limit) | |
163 | request_module("snd-card-%i", tid->card); | |
164 | break; | |
165 | default: | |
166 | break; | |
167 | } | |
168 | } | |
169 | ||
170 | #endif | |
171 | ||
172 | /* | |
173 | * look for a master instance matching with the slave id of the given slave. | |
174 | * when found, relink the open_link of the slave. | |
175 | * | |
176 | * call this with register_mutex down. | |
177 | */ | |
53d2f744 | 178 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 179 | { |
53d2f744 TI |
180 | struct snd_timer *timer; |
181 | struct snd_timer_instance *master; | |
1da177e4 LT |
182 | |
183 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
184 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
185 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
186 | if (slave->slave_class == master->slave_class && |
187 | slave->slave_id == master->slave_id) { | |
188 | list_del(&slave->open_list); | |
6b172a85 CL |
189 | list_add_tail(&slave->open_list, |
190 | &master->slave_list_head); | |
1da177e4 LT |
191 | spin_lock_irq(&slave_active_lock); |
192 | slave->master = master; | |
193 | slave->timer = master->timer; | |
194 | spin_unlock_irq(&slave_active_lock); | |
195 | return; | |
196 | } | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | /* | |
202 | * look for slave instances matching with the slave id of the given master. | |
203 | * when found, relink the open_link of slaves. | |
204 | * | |
205 | * call this with register_mutex down. | |
206 | */ | |
53d2f744 | 207 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 208 | { |
9244b2c3 | 209 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
210 | |
211 | /* check all pending slaves */ | |
9244b2c3 | 212 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
213 | if (slave->slave_class == master->slave_class && |
214 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 215 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 LT |
216 | spin_lock_irq(&slave_active_lock); |
217 | slave->master = master; | |
218 | slave->timer = master->timer; | |
219 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
220 | list_add_tail(&slave->active_list, |
221 | &master->slave_active_head); | |
1da177e4 LT |
222 | spin_unlock_irq(&slave_active_lock); |
223 | } | |
224 | } | |
225 | } | |
226 | ||
227 | /* | |
228 | * open a timer instance | |
229 | * when opening a master, the slave id must be here given. | |
230 | */ | |
53d2f744 TI |
231 | int snd_timer_open(struct snd_timer_instance **ti, |
232 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
233 | unsigned int slave_id) |
234 | { | |
53d2f744 TI |
235 | struct snd_timer *timer; |
236 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 237 | |
1da177e4 LT |
238 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
239 | /* open a slave instance */ | |
240 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
241 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
242 | snd_printd("invalid slave class %i\n", tid->dev_sclass); | |
243 | return -EINVAL; | |
244 | } | |
1a60d4c5 | 245 | mutex_lock(®ister_mutex); |
1da177e4 | 246 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 247 | if (!timeri) { |
1a60d4c5 | 248 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
249 | return -ENOMEM; |
250 | } | |
1da177e4 LT |
251 | timeri->slave_class = tid->dev_sclass; |
252 | timeri->slave_id = tid->device; | |
253 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
254 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
255 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 256 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
257 | *ti = timeri; |
258 | return 0; | |
259 | } | |
260 | ||
261 | /* open a master instance */ | |
1a60d4c5 | 262 | mutex_lock(®ister_mutex); |
1da177e4 LT |
263 | timer = snd_timer_find(tid); |
264 | #ifdef CONFIG_KMOD | |
265 | if (timer == NULL) { | |
1a60d4c5 | 266 | mutex_unlock(®ister_mutex); |
1da177e4 | 267 | snd_timer_request(tid); |
1a60d4c5 | 268 | mutex_lock(®ister_mutex); |
1da177e4 LT |
269 | timer = snd_timer_find(tid); |
270 | } | |
271 | #endif | |
2fd43d11 | 272 | if (!timer) { |
1a60d4c5 | 273 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
274 | return -ENODEV; |
275 | } | |
2fd43d11 CL |
276 | if (!list_empty(&timer->open_list_head)) { |
277 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 278 | struct snd_timer_instance, open_list); |
2fd43d11 | 279 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 280 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
281 | return -EBUSY; |
282 | } | |
283 | } | |
284 | timeri = snd_timer_instance_new(owner, timer); | |
285 | if (!timeri) { | |
1a60d4c5 | 286 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
287 | return -ENOMEM; |
288 | } | |
289 | timeri->slave_class = tid->dev_sclass; | |
290 | timeri->slave_id = slave_id; | |
291 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
292 | timer->hw.open(timer); | |
293 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
294 | snd_timer_check_master(timeri); | |
1a60d4c5 | 295 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
296 | *ti = timeri; |
297 | return 0; | |
298 | } | |
299 | ||
53d2f744 TI |
300 | static int _snd_timer_stop(struct snd_timer_instance *timeri, |
301 | int keep_flag, int event); | |
1da177e4 LT |
302 | |
303 | /* | |
304 | * close a timer instance | |
305 | */ | |
53d2f744 | 306 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 307 | { |
53d2f744 | 308 | struct snd_timer *timer = NULL; |
9244b2c3 | 309 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
310 | |
311 | snd_assert(timeri != NULL, return -ENXIO); | |
312 | ||
313 | /* force to stop the timer */ | |
314 | snd_timer_stop(timeri); | |
315 | ||
316 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
317 | /* wait, until the active callback is finished */ | |
318 | spin_lock_irq(&slave_active_lock); | |
319 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
320 | spin_unlock_irq(&slave_active_lock); | |
321 | udelay(10); | |
322 | spin_lock_irq(&slave_active_lock); | |
323 | } | |
324 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 325 | mutex_lock(®ister_mutex); |
1da177e4 | 326 | list_del(&timeri->open_list); |
1a60d4c5 | 327 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
328 | } else { |
329 | timer = timeri->timer; | |
330 | /* wait, until the active callback is finished */ | |
331 | spin_lock_irq(&timer->lock); | |
332 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
333 | spin_unlock_irq(&timer->lock); | |
334 | udelay(10); | |
335 | spin_lock_irq(&timer->lock); | |
336 | } | |
337 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 338 | mutex_lock(®ister_mutex); |
1da177e4 | 339 | list_del(&timeri->open_list); |
6b172a85 CL |
340 | if (timer && list_empty(&timer->open_list_head) && |
341 | timer->hw.close) | |
1da177e4 LT |
342 | timer->hw.close(timer); |
343 | /* remove slave links */ | |
9244b2c3 JB |
344 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
345 | open_list) { | |
1da177e4 LT |
346 | spin_lock_irq(&slave_active_lock); |
347 | _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); | |
9244b2c3 | 348 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
349 | slave->master = NULL; |
350 | slave->timer = NULL; | |
351 | spin_unlock_irq(&slave_active_lock); | |
352 | } | |
1a60d4c5 | 353 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
354 | } |
355 | if (timeri->private_free) | |
356 | timeri->private_free(timeri); | |
357 | kfree(timeri->owner); | |
358 | kfree(timeri); | |
de24214d CL |
359 | if (timer) |
360 | module_put(timer->module); | |
1da177e4 LT |
361 | return 0; |
362 | } | |
363 | ||
53d2f744 | 364 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 365 | { |
53d2f744 | 366 | struct snd_timer * timer; |
1da177e4 LT |
367 | |
368 | if (timeri == NULL) | |
369 | return 0; | |
370 | if ((timer = timeri->timer) != NULL) { | |
371 | if (timer->hw.c_resolution) | |
372 | return timer->hw.c_resolution(timer); | |
373 | return timer->hw.resolution; | |
374 | } | |
375 | return 0; | |
376 | } | |
377 | ||
53d2f744 | 378 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 379 | { |
53d2f744 | 380 | struct snd_timer *timer; |
1da177e4 LT |
381 | unsigned long flags; |
382 | unsigned long resolution = 0; | |
53d2f744 | 383 | struct snd_timer_instance *ts; |
1da177e4 LT |
384 | struct timespec tstamp; |
385 | ||
b751eef1 JK |
386 | if (timer_tstamp_monotonic) |
387 | do_posix_clock_monotonic_gettime(&tstamp); | |
388 | else | |
389 | getnstimeofday(&tstamp); | |
6b172a85 CL |
390 | snd_assert(event >= SNDRV_TIMER_EVENT_START && |
391 | event <= SNDRV_TIMER_EVENT_PAUSE, return); | |
392 | if (event == SNDRV_TIMER_EVENT_START || | |
393 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
394 | resolution = snd_timer_resolution(ti); |
395 | if (ti->ccallback) | |
396 | ti->ccallback(ti, SNDRV_TIMER_EVENT_START, &tstamp, resolution); | |
397 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) | |
398 | return; | |
399 | timer = ti->timer; | |
400 | if (timer == NULL) | |
401 | return; | |
402 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
403 | return; | |
404 | spin_lock_irqsave(&timer->lock, flags); | |
9244b2c3 | 405 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
406 | if (ts->ccallback) |
407 | ts->ccallback(ti, event + 100, &tstamp, resolution); | |
1da177e4 LT |
408 | spin_unlock_irqrestore(&timer->lock, flags); |
409 | } | |
410 | ||
53d2f744 | 411 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
6b172a85 | 412 | unsigned long sticks) |
1da177e4 LT |
413 | { |
414 | list_del(&timeri->active_list); | |
415 | list_add_tail(&timeri->active_list, &timer->active_list_head); | |
416 | if (timer->running) { | |
417 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
418 | goto __start_now; | |
419 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
420 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
421 | return 1; /* delayed start */ | |
422 | } else { | |
423 | timer->sticks = sticks; | |
424 | timer->hw.start(timer); | |
425 | __start_now: | |
426 | timer->running++; | |
427 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
428 | return 0; | |
429 | } | |
430 | } | |
431 | ||
53d2f744 | 432 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
1da177e4 LT |
433 | { |
434 | unsigned long flags; | |
435 | ||
436 | spin_lock_irqsave(&slave_active_lock, flags); | |
437 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
438 | if (timeri->master) | |
6b172a85 CL |
439 | list_add_tail(&timeri->active_list, |
440 | &timeri->master->slave_active_head); | |
1da177e4 LT |
441 | spin_unlock_irqrestore(&slave_active_lock, flags); |
442 | return 1; /* delayed start */ | |
443 | } | |
444 | ||
445 | /* | |
446 | * start the timer instance | |
6b172a85 | 447 | */ |
53d2f744 | 448 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
1da177e4 | 449 | { |
53d2f744 | 450 | struct snd_timer *timer; |
1da177e4 LT |
451 | int result = -EINVAL; |
452 | unsigned long flags; | |
453 | ||
454 | if (timeri == NULL || ticks < 1) | |
455 | return -EINVAL; | |
456 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
457 | result = snd_timer_start_slave(timeri); | |
458 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
459 | return result; | |
460 | } | |
461 | timer = timeri->timer; | |
462 | if (timer == NULL) | |
463 | return -EINVAL; | |
464 | spin_lock_irqsave(&timer->lock, flags); | |
465 | timeri->ticks = timeri->cticks = ticks; | |
466 | timeri->pticks = 0; | |
467 | result = snd_timer_start1(timer, timeri, ticks); | |
468 | spin_unlock_irqrestore(&timer->lock, flags); | |
469 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
470 | return result; | |
471 | } | |
472 | ||
53d2f744 TI |
473 | static int _snd_timer_stop(struct snd_timer_instance * timeri, |
474 | int keep_flag, int event) | |
1da177e4 | 475 | { |
53d2f744 | 476 | struct snd_timer *timer; |
1da177e4 LT |
477 | unsigned long flags; |
478 | ||
479 | snd_assert(timeri != NULL, return -ENXIO); | |
480 | ||
481 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
482 | if (!keep_flag) { | |
483 | spin_lock_irqsave(&slave_active_lock, flags); | |
484 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
485 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
486 | } | |
487 | goto __end; | |
488 | } | |
489 | timer = timeri->timer; | |
490 | if (!timer) | |
491 | return -EINVAL; | |
492 | spin_lock_irqsave(&timer->lock, flags); | |
493 | list_del_init(&timeri->ack_list); | |
494 | list_del_init(&timeri->active_list); | |
495 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
496 | !(--timer->running)) { | |
497 | timer->hw.stop(timer); | |
498 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
499 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
500 | snd_timer_reschedule(timer, 0); | |
501 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
502 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
503 | timer->hw.start(timer); | |
504 | } | |
505 | } | |
506 | } | |
507 | if (!keep_flag) | |
6b172a85 CL |
508 | timeri->flags &= |
509 | ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); | |
1da177e4 LT |
510 | spin_unlock_irqrestore(&timer->lock, flags); |
511 | __end: | |
512 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
513 | snd_timer_notify1(timeri, event); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | /* | |
518 | * stop the timer instance. | |
519 | * | |
520 | * do not call this from the timer callback! | |
521 | */ | |
53d2f744 | 522 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 523 | { |
53d2f744 | 524 | struct snd_timer *timer; |
1da177e4 LT |
525 | unsigned long flags; |
526 | int err; | |
527 | ||
528 | err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); | |
529 | if (err < 0) | |
530 | return err; | |
531 | timer = timeri->timer; | |
532 | spin_lock_irqsave(&timer->lock, flags); | |
533 | timeri->cticks = timeri->ticks; | |
534 | timeri->pticks = 0; | |
535 | spin_unlock_irqrestore(&timer->lock, flags); | |
536 | return 0; | |
537 | } | |
538 | ||
539 | /* | |
540 | * start again.. the tick is kept. | |
541 | */ | |
53d2f744 | 542 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 543 | { |
53d2f744 | 544 | struct snd_timer *timer; |
1da177e4 LT |
545 | int result = -EINVAL; |
546 | unsigned long flags; | |
547 | ||
548 | if (timeri == NULL) | |
549 | return result; | |
550 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
551 | return snd_timer_start_slave(timeri); | |
552 | timer = timeri->timer; | |
553 | if (! timer) | |
554 | return -EINVAL; | |
555 | spin_lock_irqsave(&timer->lock, flags); | |
556 | if (!timeri->cticks) | |
557 | timeri->cticks = 1; | |
558 | timeri->pticks = 0; | |
559 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
560 | spin_unlock_irqrestore(&timer->lock, flags); | |
561 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
562 | return result; | |
563 | } | |
564 | ||
565 | /* | |
566 | * pause.. remember the ticks left | |
567 | */ | |
53d2f744 | 568 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 LT |
569 | { |
570 | return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); | |
571 | } | |
572 | ||
573 | /* | |
574 | * reschedule the timer | |
575 | * | |
576 | * start pending instances and check the scheduling ticks. | |
577 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
578 | */ | |
53d2f744 | 579 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 580 | { |
53d2f744 | 581 | struct snd_timer_instance *ti; |
1da177e4 | 582 | unsigned long ticks = ~0UL; |
1da177e4 | 583 | |
9244b2c3 | 584 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
585 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
586 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
587 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
588 | timer->running++; | |
589 | } | |
590 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
591 | if (ticks > ti->cticks) | |
592 | ticks = ti->cticks; | |
593 | } | |
594 | } | |
595 | if (ticks == ~0UL) { | |
596 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
597 | return; | |
598 | } | |
599 | if (ticks > timer->hw.ticks) | |
600 | ticks = timer->hw.ticks; | |
601 | if (ticks_left != ticks) | |
602 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
603 | timer->sticks = ticks; | |
604 | } | |
605 | ||
606 | /* | |
607 | * timer tasklet | |
608 | * | |
609 | */ | |
610 | static void snd_timer_tasklet(unsigned long arg) | |
611 | { | |
53d2f744 TI |
612 | struct snd_timer *timer = (struct snd_timer *) arg; |
613 | struct snd_timer_instance *ti; | |
1da177e4 LT |
614 | struct list_head *p; |
615 | unsigned long resolution, ticks; | |
2999ff5b | 616 | unsigned long flags; |
1da177e4 | 617 | |
2999ff5b | 618 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
619 | /* now process all callbacks */ |
620 | while (!list_empty(&timer->sack_list_head)) { | |
621 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 622 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
623 | |
624 | /* remove from ack_list and make empty */ | |
625 | list_del_init(p); | |
6b172a85 | 626 | |
1da177e4 LT |
627 | ticks = ti->pticks; |
628 | ti->pticks = 0; | |
629 | resolution = ti->resolution; | |
630 | ||
631 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
632 | spin_unlock(&timer->lock); | |
633 | if (ti->callback) | |
634 | ti->callback(ti, resolution, ticks); | |
635 | spin_lock(&timer->lock); | |
636 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
637 | } | |
2999ff5b | 638 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
639 | } |
640 | ||
641 | /* | |
642 | * timer interrupt | |
643 | * | |
644 | * ticks_left is usually equal to timer->sticks. | |
645 | * | |
646 | */ | |
53d2f744 | 647 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 648 | { |
9244b2c3 | 649 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 650 | unsigned long resolution, ticks; |
9244b2c3 | 651 | struct list_head *p, *ack_list_head; |
b32425ac | 652 | unsigned long flags; |
1da177e4 LT |
653 | int use_tasklet = 0; |
654 | ||
655 | if (timer == NULL) | |
656 | return; | |
657 | ||
b32425ac | 658 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
659 | |
660 | /* remember the current resolution */ | |
661 | if (timer->hw.c_resolution) | |
662 | resolution = timer->hw.c_resolution(timer); | |
663 | else | |
664 | resolution = timer->hw.resolution; | |
665 | ||
666 | /* loop for all active instances | |
9244b2c3 | 667 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
668 | * processed instance is relinked to done_list_head before the callback |
669 | * is called. | |
1da177e4 | 670 | */ |
9244b2c3 JB |
671 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
672 | active_list) { | |
1da177e4 LT |
673 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
674 | continue; | |
675 | ti->pticks += ticks_left; | |
676 | ti->resolution = resolution; | |
677 | if (ti->cticks < ticks_left) | |
678 | ti->cticks = 0; | |
679 | else | |
680 | ti->cticks -= ticks_left; | |
681 | if (ti->cticks) /* not expired */ | |
682 | continue; | |
683 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
684 | ti->cticks = ti->ticks; | |
685 | } else { | |
686 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
687 | if (--timer->running) | |
9244b2c3 | 688 | list_del(&ti->active_list); |
1da177e4 | 689 | } |
6b172a85 CL |
690 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
691 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
692 | ack_list_head = &timer->ack_list_head; | |
693 | else | |
694 | ack_list_head = &timer->sack_list_head; | |
695 | if (list_empty(&ti->ack_list)) | |
696 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 697 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
698 | ts->pticks = ti->pticks; |
699 | ts->resolution = resolution; | |
6b172a85 CL |
700 | if (list_empty(&ts->ack_list)) |
701 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
702 | } |
703 | } | |
704 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 705 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
706 | if (timer->running) { |
707 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
708 | timer->hw.stop(timer); | |
709 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
710 | } | |
711 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
712 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
713 | /* restart timer */ | |
714 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
715 | timer->hw.start(timer); | |
716 | } | |
717 | } else { | |
718 | timer->hw.stop(timer); | |
719 | } | |
720 | ||
721 | /* now process all fast callbacks */ | |
722 | while (!list_empty(&timer->ack_list_head)) { | |
723 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 724 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 725 | |
1da177e4 LT |
726 | /* remove from ack_list and make empty */ |
727 | list_del_init(p); | |
6b172a85 | 728 | |
1da177e4 LT |
729 | ticks = ti->pticks; |
730 | ti->pticks = 0; | |
731 | ||
732 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
733 | spin_unlock(&timer->lock); | |
734 | if (ti->callback) | |
735 | ti->callback(ti, resolution, ticks); | |
736 | spin_lock(&timer->lock); | |
737 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
738 | } | |
739 | ||
740 | /* do we have any slow callbacks? */ | |
741 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 742 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
743 | |
744 | if (use_tasklet) | |
745 | tasklet_hi_schedule(&timer->task_queue); | |
746 | } | |
747 | ||
748 | /* | |
749 | ||
750 | */ | |
751 | ||
53d2f744 TI |
752 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
753 | struct snd_timer **rtimer) | |
1da177e4 | 754 | { |
53d2f744 | 755 | struct snd_timer *timer; |
1da177e4 | 756 | int err; |
53d2f744 | 757 | static struct snd_device_ops ops = { |
1da177e4 LT |
758 | .dev_free = snd_timer_dev_free, |
759 | .dev_register = snd_timer_dev_register, | |
c461482c | 760 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
761 | }; |
762 | ||
763 | snd_assert(tid != NULL, return -EINVAL); | |
764 | snd_assert(rtimer != NULL, return -EINVAL); | |
765 | *rtimer = NULL; | |
ca2c0966 | 766 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
73e77ba0 TI |
767 | if (timer == NULL) { |
768 | snd_printk(KERN_ERR "timer: cannot allocate\n"); | |
1da177e4 | 769 | return -ENOMEM; |
73e77ba0 | 770 | } |
1da177e4 LT |
771 | timer->tmr_class = tid->dev_class; |
772 | timer->card = card; | |
773 | timer->tmr_device = tid->device; | |
774 | timer->tmr_subdevice = tid->subdevice; | |
775 | if (id) | |
776 | strlcpy(timer->id, id, sizeof(timer->id)); | |
777 | INIT_LIST_HEAD(&timer->device_list); | |
778 | INIT_LIST_HEAD(&timer->open_list_head); | |
779 | INIT_LIST_HEAD(&timer->active_list_head); | |
780 | INIT_LIST_HEAD(&timer->ack_list_head); | |
781 | INIT_LIST_HEAD(&timer->sack_list_head); | |
782 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
783 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
784 | (unsigned long)timer); | |
1da177e4 | 785 | if (card != NULL) { |
de24214d | 786 | timer->module = card->module; |
6b172a85 CL |
787 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
788 | if (err < 0) { | |
1da177e4 LT |
789 | snd_timer_free(timer); |
790 | return err; | |
791 | } | |
792 | } | |
793 | *rtimer = timer; | |
794 | return 0; | |
795 | } | |
796 | ||
53d2f744 | 797 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 LT |
798 | { |
799 | snd_assert(timer != NULL, return -ENXIO); | |
c461482c TI |
800 | |
801 | mutex_lock(®ister_mutex); | |
802 | if (! list_empty(&timer->open_list_head)) { | |
803 | struct list_head *p, *n; | |
804 | struct snd_timer_instance *ti; | |
805 | snd_printk(KERN_WARNING "timer %p is busy?\n", timer); | |
806 | list_for_each_safe(p, n, &timer->open_list_head) { | |
807 | list_del_init(p); | |
808 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
809 | ti->timer = NULL; | |
810 | } | |
811 | } | |
812 | list_del(&timer->device_list); | |
813 | mutex_unlock(®ister_mutex); | |
814 | ||
1da177e4 LT |
815 | if (timer->private_free) |
816 | timer->private_free(timer); | |
817 | kfree(timer); | |
818 | return 0; | |
819 | } | |
820 | ||
53d2f744 | 821 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 822 | { |
53d2f744 | 823 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
824 | return snd_timer_free(timer); |
825 | } | |
826 | ||
53d2f744 | 827 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 828 | { |
53d2f744 TI |
829 | struct snd_timer *timer = dev->device_data; |
830 | struct snd_timer *timer1; | |
1da177e4 | 831 | |
6b172a85 CL |
832 | snd_assert(timer != NULL && timer->hw.start != NULL && |
833 | timer->hw.stop != NULL, return -ENXIO); | |
1da177e4 LT |
834 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
835 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
836 | return -EINVAL; | |
837 | ||
1a60d4c5 | 838 | mutex_lock(®ister_mutex); |
9244b2c3 | 839 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
840 | if (timer1->tmr_class > timer->tmr_class) |
841 | break; | |
842 | if (timer1->tmr_class < timer->tmr_class) | |
843 | continue; | |
844 | if (timer1->card && timer->card) { | |
845 | if (timer1->card->number > timer->card->number) | |
846 | break; | |
847 | if (timer1->card->number < timer->card->number) | |
848 | continue; | |
849 | } | |
850 | if (timer1->tmr_device > timer->tmr_device) | |
851 | break; | |
852 | if (timer1->tmr_device < timer->tmr_device) | |
853 | continue; | |
854 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
855 | break; | |
856 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
857 | continue; | |
858 | /* conflicts.. */ | |
1a60d4c5 | 859 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
860 | return -EBUSY; |
861 | } | |
9244b2c3 | 862 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 863 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
864 | return 0; |
865 | } | |
866 | ||
c461482c | 867 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 868 | { |
c461482c | 869 | struct snd_timer *timer = device->device_data; |
1a60d4c5 | 870 | mutex_lock(®ister_mutex); |
c461482c | 871 | list_del_init(&timer->device_list); |
1a60d4c5 | 872 | mutex_unlock(®ister_mutex); |
c461482c | 873 | return 0; |
1da177e4 LT |
874 | } |
875 | ||
53d2f744 | 876 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
877 | { |
878 | unsigned long flags; | |
879 | unsigned long resolution = 0; | |
53d2f744 | 880 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 881 | |
7c22f1aa TI |
882 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
883 | return; | |
6b172a85 CL |
884 | snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && |
885 | event <= SNDRV_TIMER_EVENT_MRESUME, return); | |
1da177e4 | 886 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
887 | if (event == SNDRV_TIMER_EVENT_MSTART || |
888 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
889 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
890 | if (timer->hw.c_resolution) |
891 | resolution = timer->hw.c_resolution(timer); | |
892 | else | |
893 | resolution = timer->hw.resolution; | |
894 | } | |
9244b2c3 | 895 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
896 | if (ti->ccallback) |
897 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 898 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
899 | if (ts->ccallback) |
900 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
901 | } |
902 | spin_unlock_irqrestore(&timer->lock, flags); | |
903 | } | |
904 | ||
905 | /* | |
906 | * exported functions for global timers | |
907 | */ | |
53d2f744 | 908 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 909 | { |
53d2f744 | 910 | struct snd_timer_id tid; |
6b172a85 | 911 | |
1da177e4 LT |
912 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
913 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
914 | tid.card = -1; | |
915 | tid.device = device; | |
916 | tid.subdevice = 0; | |
917 | return snd_timer_new(NULL, id, &tid, rtimer); | |
918 | } | |
919 | ||
53d2f744 | 920 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
921 | { |
922 | return snd_timer_free(timer); | |
923 | } | |
924 | ||
53d2f744 | 925 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 926 | { |
53d2f744 | 927 | struct snd_device dev; |
1da177e4 LT |
928 | |
929 | memset(&dev, 0, sizeof(dev)); | |
930 | dev.device_data = timer; | |
931 | return snd_timer_dev_register(&dev); | |
932 | } | |
933 | ||
6b172a85 | 934 | /* |
1da177e4 LT |
935 | * System timer |
936 | */ | |
937 | ||
938 | struct snd_timer_system_private { | |
939 | struct timer_list tlist; | |
1da177e4 LT |
940 | unsigned long last_expires; |
941 | unsigned long last_jiffies; | |
942 | unsigned long correction; | |
943 | }; | |
944 | ||
1da177e4 LT |
945 | static void snd_timer_s_function(unsigned long data) |
946 | { | |
53d2f744 | 947 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
948 | struct snd_timer_system_private *priv = timer->private_data; |
949 | unsigned long jiff = jiffies; | |
950 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 951 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
952 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
953 | } | |
954 | ||
53d2f744 | 955 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
956 | { |
957 | struct snd_timer_system_private *priv; | |
958 | unsigned long njiff; | |
959 | ||
960 | priv = (struct snd_timer_system_private *) timer->private_data; | |
961 | njiff = (priv->last_jiffies = jiffies); | |
962 | if (priv->correction > timer->sticks - 1) { | |
963 | priv->correction -= timer->sticks - 1; | |
964 | njiff++; | |
965 | } else { | |
966 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 967 | priv->correction = 0; |
1da177e4 LT |
968 | } |
969 | priv->last_expires = priv->tlist.expires = njiff; | |
970 | add_timer(&priv->tlist); | |
971 | return 0; | |
972 | } | |
973 | ||
53d2f744 | 974 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
975 | { |
976 | struct snd_timer_system_private *priv; | |
977 | unsigned long jiff; | |
978 | ||
979 | priv = (struct snd_timer_system_private *) timer->private_data; | |
980 | del_timer(&priv->tlist); | |
981 | jiff = jiffies; | |
982 | if (time_before(jiff, priv->last_expires)) | |
983 | timer->sticks = priv->last_expires - jiff; | |
984 | else | |
985 | timer->sticks = 1; | |
de2696d8 | 986 | priv->correction = 0; |
1da177e4 LT |
987 | return 0; |
988 | } | |
989 | ||
53d2f744 | 990 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
991 | { |
992 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
993 | .resolution = 1000000000L / HZ, | |
994 | .ticks = 10000000L, | |
995 | .start = snd_timer_s_start, | |
996 | .stop = snd_timer_s_stop | |
997 | }; | |
998 | ||
53d2f744 | 999 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1000 | { |
1001 | kfree(timer->private_data); | |
1002 | } | |
1003 | ||
1004 | static int snd_timer_register_system(void) | |
1005 | { | |
53d2f744 | 1006 | struct snd_timer *timer; |
1da177e4 LT |
1007 | struct snd_timer_system_private *priv; |
1008 | int err; | |
1009 | ||
6b172a85 CL |
1010 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1011 | if (err < 0) | |
1da177e4 LT |
1012 | return err; |
1013 | strcpy(timer->name, "system timer"); | |
1014 | timer->hw = snd_timer_system; | |
ca2c0966 | 1015 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1016 | if (priv == NULL) { |
1017 | snd_timer_free(timer); | |
1018 | return -ENOMEM; | |
1019 | } | |
1020 | init_timer(&priv->tlist); | |
1021 | priv->tlist.function = snd_timer_s_function; | |
1022 | priv->tlist.data = (unsigned long) timer; | |
1023 | timer->private_data = priv; | |
1024 | timer->private_free = snd_timer_free_system; | |
1025 | return snd_timer_global_register(timer); | |
1026 | } | |
1027 | ||
e28563cc | 1028 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1029 | /* |
1030 | * Info interface | |
1031 | */ | |
1032 | ||
53d2f744 TI |
1033 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1034 | struct snd_info_buffer *buffer) | |
1da177e4 | 1035 | { |
53d2f744 TI |
1036 | struct snd_timer *timer; |
1037 | struct snd_timer_instance *ti; | |
1da177e4 | 1038 | |
1a60d4c5 | 1039 | mutex_lock(®ister_mutex); |
9244b2c3 | 1040 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
1041 | switch (timer->tmr_class) { |
1042 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1043 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1044 | break; | |
1045 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1046 | snd_iprintf(buffer, "C%i-%i: ", |
1047 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1048 | break; |
1049 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1050 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1051 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1052 | break; |
1053 | default: | |
6b172a85 CL |
1054 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1055 | timer->card ? timer->card->number : -1, | |
1056 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1057 | } |
1058 | snd_iprintf(buffer, "%s :", timer->name); | |
1059 | if (timer->hw.resolution) | |
6b172a85 CL |
1060 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1061 | timer->hw.resolution / 1000, | |
1062 | timer->hw.resolution % 1000, | |
1063 | timer->hw.ticks); | |
1da177e4 LT |
1064 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1065 | snd_iprintf(buffer, " SLAVE"); | |
1066 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1067 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1068 | snd_iprintf(buffer, " Client %s : %s\n", |
1069 | ti->owner ? ti->owner : "unknown", | |
1070 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1071 | SNDRV_TIMER_IFLG_RUNNING) | |
1072 | ? "running" : "stopped"); | |
1da177e4 | 1073 | } |
1a60d4c5 | 1074 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1075 | } |
1076 | ||
6581f4e7 | 1077 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1078 | |
1079 | static void __init snd_timer_proc_init(void) | |
1080 | { | |
1081 | struct snd_info_entry *entry; | |
1082 | ||
1083 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1084 | if (entry != NULL) { | |
e28563cc TI |
1085 | entry->c.text.read = snd_timer_proc_read; |
1086 | if (snd_info_register(entry) < 0) { | |
1087 | snd_info_free_entry(entry); | |
1088 | entry = NULL; | |
1089 | } | |
1090 | } | |
1091 | snd_timer_proc_entry = entry; | |
1092 | } | |
1093 | ||
1094 | static void __exit snd_timer_proc_done(void) | |
1095 | { | |
746d4a02 | 1096 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc TI |
1097 | } |
1098 | #else /* !CONFIG_PROC_FS */ | |
1099 | #define snd_timer_proc_init() | |
1100 | #define snd_timer_proc_done() | |
1101 | #endif | |
1102 | ||
1da177e4 LT |
1103 | /* |
1104 | * USER SPACE interface | |
1105 | */ | |
1106 | ||
53d2f744 | 1107 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1108 | unsigned long resolution, |
1109 | unsigned long ticks) | |
1110 | { | |
53d2f744 TI |
1111 | struct snd_timer_user *tu = timeri->callback_data; |
1112 | struct snd_timer_read *r; | |
1da177e4 | 1113 | int prev; |
6b172a85 | 1114 | |
1da177e4 LT |
1115 | spin_lock(&tu->qlock); |
1116 | if (tu->qused > 0) { | |
1117 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1118 | r = &tu->queue[prev]; | |
1119 | if (r->resolution == resolution) { | |
1120 | r->ticks += ticks; | |
1121 | goto __wake; | |
1122 | } | |
1123 | } | |
1124 | if (tu->qused >= tu->queue_size) { | |
1125 | tu->overrun++; | |
1126 | } else { | |
1127 | r = &tu->queue[tu->qtail++]; | |
1128 | tu->qtail %= tu->queue_size; | |
1129 | r->resolution = resolution; | |
1130 | r->ticks = ticks; | |
1131 | tu->qused++; | |
1132 | } | |
1133 | __wake: | |
1134 | spin_unlock(&tu->qlock); | |
1135 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1136 | wake_up(&tu->qchange_sleep); | |
1137 | } | |
1138 | ||
53d2f744 TI |
1139 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1140 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1141 | { |
1142 | if (tu->qused >= tu->queue_size) { | |
1143 | tu->overrun++; | |
1144 | } else { | |
1145 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1146 | tu->qtail %= tu->queue_size; | |
1147 | tu->qused++; | |
1148 | } | |
1149 | } | |
1150 | ||
53d2f744 TI |
1151 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1152 | int event, | |
1da177e4 LT |
1153 | struct timespec *tstamp, |
1154 | unsigned long resolution) | |
1155 | { | |
53d2f744 TI |
1156 | struct snd_timer_user *tu = timeri->callback_data; |
1157 | struct snd_timer_tread r1; | |
1da177e4 | 1158 | |
6b172a85 CL |
1159 | if (event >= SNDRV_TIMER_EVENT_START && |
1160 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1161 | tu->tstamp = *tstamp; |
1162 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1163 | return; | |
1164 | r1.event = event; | |
1165 | r1.tstamp = *tstamp; | |
1166 | r1.val = resolution; | |
1167 | spin_lock(&tu->qlock); | |
1168 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1169 | spin_unlock(&tu->qlock); | |
1170 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1171 | wake_up(&tu->qchange_sleep); | |
1172 | } | |
1173 | ||
53d2f744 | 1174 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1175 | unsigned long resolution, |
1176 | unsigned long ticks) | |
1177 | { | |
53d2f744 TI |
1178 | struct snd_timer_user *tu = timeri->callback_data; |
1179 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1180 | struct timespec tstamp; |
1181 | int prev, append = 0; | |
1182 | ||
07799e75 | 1183 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1184 | spin_lock(&tu->qlock); |
6b172a85 CL |
1185 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1186 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1187 | spin_unlock(&tu->qlock); |
1188 | return; | |
1189 | } | |
b751eef1 JK |
1190 | if (tu->last_resolution != resolution || ticks > 0) { |
1191 | if (timer_tstamp_monotonic) | |
1192 | do_posix_clock_monotonic_gettime(&tstamp); | |
1193 | else | |
1194 | getnstimeofday(&tstamp); | |
1195 | } | |
6b172a85 CL |
1196 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1197 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1198 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1199 | r1.tstamp = tstamp; | |
1200 | r1.val = resolution; | |
1201 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1202 | tu->last_resolution = resolution; | |
1203 | append++; | |
1204 | } | |
1205 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1206 | goto __wake; | |
1207 | if (ticks == 0) | |
1208 | goto __wake; | |
1209 | if (tu->qused > 0) { | |
1210 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1211 | r = &tu->tqueue[prev]; | |
1212 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1213 | r->tstamp = tstamp; | |
1214 | r->val += ticks; | |
1215 | append++; | |
1216 | goto __wake; | |
1217 | } | |
1218 | } | |
1219 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1220 | r1.tstamp = tstamp; | |
1221 | r1.val = ticks; | |
1222 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1223 | append++; | |
1224 | __wake: | |
1225 | spin_unlock(&tu->qlock); | |
1226 | if (append == 0) | |
1227 | return; | |
1228 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1229 | wake_up(&tu->qchange_sleep); | |
1230 | } | |
1231 | ||
1232 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1233 | { | |
53d2f744 | 1234 | struct snd_timer_user *tu; |
6b172a85 | 1235 | |
ca2c0966 | 1236 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1237 | if (tu == NULL) |
1238 | return -ENOMEM; | |
1239 | spin_lock_init(&tu->qlock); | |
1240 | init_waitqueue_head(&tu->qchange_sleep); | |
1a60d4c5 | 1241 | mutex_init(&tu->tread_sem); |
1da177e4 LT |
1242 | tu->ticks = 1; |
1243 | tu->queue_size = 128; | |
53d2f744 | 1244 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1245 | GFP_KERNEL); |
1da177e4 LT |
1246 | if (tu->queue == NULL) { |
1247 | kfree(tu); | |
1248 | return -ENOMEM; | |
1249 | } | |
1250 | file->private_data = tu; | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1255 | { | |
53d2f744 | 1256 | struct snd_timer_user *tu; |
1da177e4 LT |
1257 | |
1258 | if (file->private_data) { | |
1259 | tu = file->private_data; | |
1260 | file->private_data = NULL; | |
1261 | fasync_helper(-1, file, 0, &tu->fasync); | |
1262 | if (tu->timeri) | |
1263 | snd_timer_close(tu->timeri); | |
1264 | kfree(tu->queue); | |
1265 | kfree(tu->tqueue); | |
1266 | kfree(tu); | |
1267 | } | |
1268 | return 0; | |
1269 | } | |
1270 | ||
53d2f744 | 1271 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1272 | { |
1273 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1274 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1275 | id->card = -1; | |
1276 | id->device = -1; | |
1277 | id->subdevice = -1; | |
1278 | } | |
1279 | ||
53d2f744 | 1280 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1281 | { |
1282 | id->dev_class = timer->tmr_class; | |
1283 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1284 | id->card = timer->card ? timer->card->number : -1; | |
1285 | id->device = timer->tmr_device; | |
1286 | id->subdevice = timer->tmr_subdevice; | |
1287 | } | |
1288 | ||
53d2f744 | 1289 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1290 | { |
53d2f744 TI |
1291 | struct snd_timer_id id; |
1292 | struct snd_timer *timer; | |
1da177e4 | 1293 | struct list_head *p; |
6b172a85 | 1294 | |
1da177e4 LT |
1295 | if (copy_from_user(&id, _tid, sizeof(id))) |
1296 | return -EFAULT; | |
1a60d4c5 | 1297 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1298 | if (id.dev_class < 0) { /* first item */ |
1299 | if (list_empty(&snd_timer_list)) | |
1300 | snd_timer_user_zero_id(&id); | |
1301 | else { | |
9dfba380 | 1302 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1303 | struct snd_timer, device_list); |
1da177e4 LT |
1304 | snd_timer_user_copy_id(&id, timer); |
1305 | } | |
1306 | } else { | |
1307 | switch (id.dev_class) { | |
1308 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1309 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1310 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1311 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1312 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1313 | snd_timer_user_copy_id(&id, timer); | |
1314 | break; | |
1315 | } | |
1316 | if (timer->tmr_device >= id.device) { | |
1317 | snd_timer_user_copy_id(&id, timer); | |
1318 | break; | |
1319 | } | |
1320 | } | |
1321 | if (p == &snd_timer_list) | |
1322 | snd_timer_user_zero_id(&id); | |
1323 | break; | |
1324 | case SNDRV_TIMER_CLASS_CARD: | |
1325 | case SNDRV_TIMER_CLASS_PCM: | |
1326 | if (id.card < 0) { | |
1327 | id.card = 0; | |
1328 | } else { | |
1329 | if (id.card < 0) { | |
1330 | id.card = 0; | |
1331 | } else { | |
1332 | if (id.device < 0) { | |
1333 | id.device = 0; | |
1334 | } else { | |
6b172a85 CL |
1335 | if (id.subdevice < 0) { |
1336 | id.subdevice = 0; | |
1337 | } else { | |
1338 | id.subdevice++; | |
1339 | } | |
1da177e4 LT |
1340 | } |
1341 | } | |
1342 | } | |
1343 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1344 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1345 | if (timer->tmr_class > id.dev_class) { |
1346 | snd_timer_user_copy_id(&id, timer); | |
1347 | break; | |
1348 | } | |
1349 | if (timer->tmr_class < id.dev_class) | |
1350 | continue; | |
1351 | if (timer->card->number > id.card) { | |
1352 | snd_timer_user_copy_id(&id, timer); | |
1353 | break; | |
1354 | } | |
1355 | if (timer->card->number < id.card) | |
1356 | continue; | |
1357 | if (timer->tmr_device > id.device) { | |
1358 | snd_timer_user_copy_id(&id, timer); | |
1359 | break; | |
1360 | } | |
1361 | if (timer->tmr_device < id.device) | |
1362 | continue; | |
1363 | if (timer->tmr_subdevice > id.subdevice) { | |
1364 | snd_timer_user_copy_id(&id, timer); | |
1365 | break; | |
1366 | } | |
1367 | if (timer->tmr_subdevice < id.subdevice) | |
1368 | continue; | |
1369 | snd_timer_user_copy_id(&id, timer); | |
1370 | break; | |
1371 | } | |
1372 | if (p == &snd_timer_list) | |
1373 | snd_timer_user_zero_id(&id); | |
1374 | break; | |
1375 | default: | |
1376 | snd_timer_user_zero_id(&id); | |
1377 | } | |
1378 | } | |
1a60d4c5 | 1379 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1380 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1381 | return -EFAULT; | |
1382 | return 0; | |
6b172a85 | 1383 | } |
1da177e4 | 1384 | |
6b172a85 | 1385 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1386 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1387 | { |
53d2f744 TI |
1388 | struct snd_timer_ginfo *ginfo; |
1389 | struct snd_timer_id tid; | |
1390 | struct snd_timer *t; | |
1da177e4 LT |
1391 | struct list_head *p; |
1392 | int err = 0; | |
1393 | ||
1394 | ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL); | |
1395 | if (! ginfo) | |
1396 | return -ENOMEM; | |
1397 | if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) { | |
1398 | kfree(ginfo); | |
1399 | return -EFAULT; | |
1400 | } | |
1401 | tid = ginfo->tid; | |
1402 | memset(ginfo, 0, sizeof(*ginfo)); | |
1403 | ginfo->tid = tid; | |
1a60d4c5 | 1404 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1405 | t = snd_timer_find(&tid); |
1406 | if (t != NULL) { | |
1407 | ginfo->card = t->card ? t->card->number : -1; | |
1408 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1409 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1410 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1411 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1412 | ginfo->resolution = t->hw.resolution; | |
1413 | if (t->hw.resolution_min > 0) { | |
1414 | ginfo->resolution_min = t->hw.resolution_min; | |
1415 | ginfo->resolution_max = t->hw.resolution_max; | |
1416 | } | |
1417 | list_for_each(p, &t->open_list_head) { | |
1418 | ginfo->clients++; | |
1419 | } | |
1420 | } else { | |
1421 | err = -ENODEV; | |
1422 | } | |
1a60d4c5 | 1423 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1424 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1425 | err = -EFAULT; | |
1426 | kfree(ginfo); | |
1427 | return err; | |
1428 | } | |
1429 | ||
6b172a85 | 1430 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1431 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1432 | { |
53d2f744 TI |
1433 | struct snd_timer_gparams gparams; |
1434 | struct snd_timer *t; | |
1da177e4 LT |
1435 | int err; |
1436 | ||
1437 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1438 | return -EFAULT; | |
1a60d4c5 | 1439 | mutex_lock(®ister_mutex); |
1da177e4 | 1440 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1441 | if (!t) { |
1da177e4 | 1442 | err = -ENODEV; |
6b172a85 CL |
1443 | goto _error; |
1444 | } | |
1445 | if (!list_empty(&t->open_list_head)) { | |
1446 | err = -EBUSY; | |
1447 | goto _error; | |
1448 | } | |
1449 | if (!t->hw.set_period) { | |
1450 | err = -ENOSYS; | |
1451 | goto _error; | |
1da177e4 | 1452 | } |
6b172a85 CL |
1453 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1454 | _error: | |
1a60d4c5 | 1455 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1456 | return err; |
1457 | } | |
1458 | ||
6b172a85 | 1459 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1460 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1461 | { |
53d2f744 TI |
1462 | struct snd_timer_gstatus gstatus; |
1463 | struct snd_timer_id tid; | |
1464 | struct snd_timer *t; | |
1da177e4 LT |
1465 | int err = 0; |
1466 | ||
1467 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1468 | return -EFAULT; | |
1469 | tid = gstatus.tid; | |
1470 | memset(&gstatus, 0, sizeof(gstatus)); | |
1471 | gstatus.tid = tid; | |
1a60d4c5 | 1472 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1473 | t = snd_timer_find(&tid); |
1474 | if (t != NULL) { | |
1475 | if (t->hw.c_resolution) | |
1476 | gstatus.resolution = t->hw.c_resolution(t); | |
1477 | else | |
1478 | gstatus.resolution = t->hw.resolution; | |
1479 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1480 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1481 | &gstatus.resolution_den); | |
1da177e4 LT |
1482 | } else { |
1483 | gstatus.resolution_num = gstatus.resolution; | |
1484 | gstatus.resolution_den = 1000000000uL; | |
1485 | } | |
1486 | } else { | |
1487 | err = -ENODEV; | |
1488 | } | |
1a60d4c5 | 1489 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1490 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1491 | err = -EFAULT; | |
1492 | return err; | |
1493 | } | |
1494 | ||
6b172a85 | 1495 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1496 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1497 | { |
53d2f744 TI |
1498 | struct snd_timer_user *tu; |
1499 | struct snd_timer_select tselect; | |
1da177e4 | 1500 | char str[32]; |
c1935b4d | 1501 | int err = 0; |
6b172a85 | 1502 | |
1da177e4 | 1503 | tu = file->private_data; |
1a60d4c5 | 1504 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1505 | if (tu->timeri) { |
1da177e4 | 1506 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1507 | tu->timeri = NULL; |
1508 | } | |
1509 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1510 | err = -EFAULT; | |
1511 | goto __err; | |
1512 | } | |
1da177e4 LT |
1513 | sprintf(str, "application %i", current->pid); |
1514 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1515 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1516 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1517 | if (err < 0) | |
c1935b4d | 1518 | goto __err; |
1da177e4 | 1519 | |
4d572776 JJ |
1520 | kfree(tu->queue); |
1521 | tu->queue = NULL; | |
1522 | kfree(tu->tqueue); | |
1523 | tu->tqueue = NULL; | |
1da177e4 | 1524 | if (tu->tread) { |
53d2f744 | 1525 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1526 | GFP_KERNEL); |
c1935b4d JK |
1527 | if (tu->tqueue == NULL) |
1528 | err = -ENOMEM; | |
1da177e4 | 1529 | } else { |
53d2f744 | 1530 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1531 | GFP_KERNEL); |
c1935b4d JK |
1532 | if (tu->queue == NULL) |
1533 | err = -ENOMEM; | |
1da177e4 | 1534 | } |
6b172a85 | 1535 | |
c1935b4d JK |
1536 | if (err < 0) { |
1537 | snd_timer_close(tu->timeri); | |
1538 | tu->timeri = NULL; | |
1539 | } else { | |
1540 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1541 | tu->timeri->callback = tu->tread |
1542 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1543 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1544 | tu->timeri->callback_data = (void *)tu; | |
1545 | } | |
1546 | ||
1547 | __err: | |
1a60d4c5 | 1548 | mutex_unlock(&tu->tread_sem); |
c1935b4d | 1549 | return err; |
1da177e4 LT |
1550 | } |
1551 | ||
6b172a85 | 1552 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1553 | struct snd_timer_info __user *_info) |
1da177e4 | 1554 | { |
53d2f744 TI |
1555 | struct snd_timer_user *tu; |
1556 | struct snd_timer_info *info; | |
1557 | struct snd_timer *t; | |
1da177e4 LT |
1558 | int err = 0; |
1559 | ||
1560 | tu = file->private_data; | |
7c64ec34 CL |
1561 | if (!tu->timeri) |
1562 | return -EBADFD; | |
1da177e4 | 1563 | t = tu->timeri->timer; |
7c64ec34 CL |
1564 | if (!t) |
1565 | return -EBADFD; | |
1da177e4 | 1566 | |
ca2c0966 | 1567 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1568 | if (! info) |
1569 | return -ENOMEM; | |
1570 | info->card = t->card ? t->card->number : -1; | |
1571 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1572 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1573 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1574 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1575 | info->resolution = t->hw.resolution; | |
1576 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1577 | err = -EFAULT; | |
1578 | kfree(info); | |
1579 | return err; | |
1580 | } | |
1581 | ||
6b172a85 | 1582 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1583 | struct snd_timer_params __user *_params) |
1da177e4 | 1584 | { |
53d2f744 TI |
1585 | struct snd_timer_user *tu; |
1586 | struct snd_timer_params params; | |
1587 | struct snd_timer *t; | |
1588 | struct snd_timer_read *tr; | |
1589 | struct snd_timer_tread *ttr; | |
1da177e4 | 1590 | int err; |
6b172a85 | 1591 | |
1da177e4 | 1592 | tu = file->private_data; |
7c64ec34 CL |
1593 | if (!tu->timeri) |
1594 | return -EBADFD; | |
1da177e4 | 1595 | t = tu->timeri->timer; |
7c64ec34 CL |
1596 | if (!t) |
1597 | return -EBADFD; | |
1da177e4 LT |
1598 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1599 | return -EFAULT; | |
1600 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1601 | err = -EINVAL; | |
1602 | goto _end; | |
1603 | } | |
6b172a85 CL |
1604 | if (params.queue_size > 0 && |
1605 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1606 | err = -EINVAL; |
1607 | goto _end; | |
1608 | } | |
1609 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1610 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1611 | (1<<SNDRV_TIMER_EVENT_START)| | |
1612 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1613 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1614 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1615 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1616 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1617 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1618 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1619 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1620 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1621 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1622 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1623 | err = -EINVAL; |
1624 | goto _end; | |
1625 | } | |
1626 | snd_timer_stop(tu->timeri); | |
1627 | spin_lock_irq(&t->lock); | |
1628 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1629 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1630 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1631 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1632 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1633 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1634 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1635 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1636 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1637 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1638 | if (params.queue_size > 0 && |
1639 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1640 | if (tu->tread) { |
6b172a85 CL |
1641 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1642 | GFP_KERNEL); | |
1da177e4 LT |
1643 | if (ttr) { |
1644 | kfree(tu->tqueue); | |
1645 | tu->queue_size = params.queue_size; | |
1646 | tu->tqueue = ttr; | |
1647 | } | |
1648 | } else { | |
6b172a85 CL |
1649 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1650 | GFP_KERNEL); | |
1da177e4 LT |
1651 | if (tr) { |
1652 | kfree(tu->queue); | |
1653 | tu->queue_size = params.queue_size; | |
1654 | tu->queue = tr; | |
1655 | } | |
1656 | } | |
1657 | } | |
1658 | tu->qhead = tu->qtail = tu->qused = 0; | |
1659 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1660 | if (tu->tread) { | |
53d2f744 | 1661 | struct snd_timer_tread tread; |
1da177e4 LT |
1662 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1663 | tread.tstamp.tv_sec = 0; | |
1664 | tread.tstamp.tv_nsec = 0; | |
1665 | tread.val = 0; | |
1666 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1667 | } else { | |
53d2f744 | 1668 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1669 | r->resolution = 0; |
1670 | r->ticks = 0; | |
1671 | tu->qused++; | |
1672 | tu->qtail++; | |
1673 | } | |
1da177e4 LT |
1674 | } |
1675 | tu->filter = params.filter; | |
1676 | tu->ticks = params.ticks; | |
1677 | err = 0; | |
1678 | _end: | |
1679 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1680 | return -EFAULT; | |
1681 | return err; | |
1682 | } | |
1683 | ||
6b172a85 | 1684 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1685 | struct snd_timer_status __user *_status) |
1da177e4 | 1686 | { |
53d2f744 TI |
1687 | struct snd_timer_user *tu; |
1688 | struct snd_timer_status status; | |
6b172a85 | 1689 | |
1da177e4 | 1690 | tu = file->private_data; |
7c64ec34 CL |
1691 | if (!tu->timeri) |
1692 | return -EBADFD; | |
1da177e4 LT |
1693 | memset(&status, 0, sizeof(status)); |
1694 | status.tstamp = tu->tstamp; | |
1695 | status.resolution = snd_timer_resolution(tu->timeri); | |
1696 | status.lost = tu->timeri->lost; | |
1697 | status.overrun = tu->overrun; | |
1698 | spin_lock_irq(&tu->qlock); | |
1699 | status.queue = tu->qused; | |
1700 | spin_unlock_irq(&tu->qlock); | |
1701 | if (copy_to_user(_status, &status, sizeof(status))) | |
1702 | return -EFAULT; | |
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static int snd_timer_user_start(struct file *file) | |
1707 | { | |
1708 | int err; | |
53d2f744 | 1709 | struct snd_timer_user *tu; |
6b172a85 | 1710 | |
1da177e4 | 1711 | tu = file->private_data; |
7c64ec34 CL |
1712 | if (!tu->timeri) |
1713 | return -EBADFD; | |
1da177e4 LT |
1714 | snd_timer_stop(tu->timeri); |
1715 | tu->timeri->lost = 0; | |
1716 | tu->last_resolution = 0; | |
1717 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1718 | } | |
1719 | ||
1720 | static int snd_timer_user_stop(struct file *file) | |
1721 | { | |
1722 | int err; | |
53d2f744 | 1723 | struct snd_timer_user *tu; |
6b172a85 | 1724 | |
1da177e4 | 1725 | tu = file->private_data; |
7c64ec34 CL |
1726 | if (!tu->timeri) |
1727 | return -EBADFD; | |
1da177e4 LT |
1728 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1729 | } | |
1730 | ||
1731 | static int snd_timer_user_continue(struct file *file) | |
1732 | { | |
1733 | int err; | |
53d2f744 | 1734 | struct snd_timer_user *tu; |
6b172a85 | 1735 | |
1da177e4 | 1736 | tu = file->private_data; |
7c64ec34 CL |
1737 | if (!tu->timeri) |
1738 | return -EBADFD; | |
1da177e4 LT |
1739 | tu->timeri->lost = 0; |
1740 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1741 | } | |
1742 | ||
15790a6b TI |
1743 | static int snd_timer_user_pause(struct file *file) |
1744 | { | |
1745 | int err; | |
53d2f744 | 1746 | struct snd_timer_user *tu; |
6b172a85 | 1747 | |
15790a6b | 1748 | tu = file->private_data; |
7c64ec34 CL |
1749 | if (!tu->timeri) |
1750 | return -EBADFD; | |
d138b445 | 1751 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1752 | } |
1753 | ||
8c50b37c TI |
1754 | enum { |
1755 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1756 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1757 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1758 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1759 | }; | |
1760 | ||
6b172a85 CL |
1761 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1762 | unsigned long arg) | |
1da177e4 | 1763 | { |
53d2f744 | 1764 | struct snd_timer_user *tu; |
1da177e4 LT |
1765 | void __user *argp = (void __user *)arg; |
1766 | int __user *p = argp; | |
6b172a85 | 1767 | |
1da177e4 LT |
1768 | tu = file->private_data; |
1769 | switch (cmd) { | |
1770 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1771 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1772 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1773 | return snd_timer_user_next_device(argp); | |
1774 | case SNDRV_TIMER_IOCTL_TREAD: | |
1775 | { | |
1776 | int xarg; | |
6b172a85 | 1777 | |
1a60d4c5 | 1778 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1779 | if (tu->timeri) { /* too late */ |
1a60d4c5 | 1780 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1781 | return -EBUSY; |
c1935b4d JK |
1782 | } |
1783 | if (get_user(xarg, p)) { | |
1a60d4c5 | 1784 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1785 | return -EFAULT; |
c1935b4d | 1786 | } |
1da177e4 | 1787 | tu->tread = xarg ? 1 : 0; |
1a60d4c5 | 1788 | mutex_unlock(&tu->tread_sem); |
1da177e4 LT |
1789 | return 0; |
1790 | } | |
1791 | case SNDRV_TIMER_IOCTL_GINFO: | |
1792 | return snd_timer_user_ginfo(file, argp); | |
1793 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1794 | return snd_timer_user_gparams(file, argp); | |
1795 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1796 | return snd_timer_user_gstatus(file, argp); | |
1797 | case SNDRV_TIMER_IOCTL_SELECT: | |
1798 | return snd_timer_user_tselect(file, argp); | |
1799 | case SNDRV_TIMER_IOCTL_INFO: | |
1800 | return snd_timer_user_info(file, argp); | |
1801 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1802 | return snd_timer_user_params(file, argp); | |
1803 | case SNDRV_TIMER_IOCTL_STATUS: | |
1804 | return snd_timer_user_status(file, argp); | |
1805 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1806 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1807 | return snd_timer_user_start(file); |
1808 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1809 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1810 | return snd_timer_user_stop(file); |
1811 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1812 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1813 | return snd_timer_user_continue(file); |
15790a6b | 1814 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1815 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1816 | return snd_timer_user_pause(file); |
1da177e4 LT |
1817 | } |
1818 | return -ENOTTY; | |
1819 | } | |
1820 | ||
1821 | static int snd_timer_user_fasync(int fd, struct file * file, int on) | |
1822 | { | |
53d2f744 | 1823 | struct snd_timer_user *tu; |
1da177e4 | 1824 | int err; |
6b172a85 | 1825 | |
1da177e4 LT |
1826 | tu = file->private_data; |
1827 | err = fasync_helper(fd, file, on, &tu->fasync); | |
1828 | if (err < 0) | |
1829 | return err; | |
1830 | return 0; | |
1831 | } | |
1832 | ||
6b172a85 CL |
1833 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1834 | size_t count, loff_t *offset) | |
1da177e4 | 1835 | { |
53d2f744 | 1836 | struct snd_timer_user *tu; |
1da177e4 LT |
1837 | long result = 0, unit; |
1838 | int err = 0; | |
6b172a85 | 1839 | |
1da177e4 | 1840 | tu = file->private_data; |
53d2f744 | 1841 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1842 | spin_lock_irq(&tu->qlock); |
1843 | while ((long)count - result >= unit) { | |
1844 | while (!tu->qused) { | |
1845 | wait_queue_t wait; | |
1846 | ||
1847 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1848 | err = -EAGAIN; | |
1849 | break; | |
1850 | } | |
1851 | ||
1852 | set_current_state(TASK_INTERRUPTIBLE); | |
1853 | init_waitqueue_entry(&wait, current); | |
1854 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1855 | ||
1856 | spin_unlock_irq(&tu->qlock); | |
1857 | schedule(); | |
1858 | spin_lock_irq(&tu->qlock); | |
1859 | ||
1860 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1861 | ||
1862 | if (signal_pending(current)) { | |
1863 | err = -ERESTARTSYS; | |
1864 | break; | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | spin_unlock_irq(&tu->qlock); | |
1869 | if (err < 0) | |
1870 | goto _error; | |
1871 | ||
1872 | if (tu->tread) { | |
6b172a85 | 1873 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1874 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1875 | err = -EFAULT; |
1876 | goto _error; | |
1877 | } | |
1878 | } else { | |
6b172a85 | 1879 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1880 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1881 | err = -EFAULT; |
1882 | goto _error; | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | tu->qhead %= tu->queue_size; | |
1887 | ||
1888 | result += unit; | |
1889 | buffer += unit; | |
1890 | ||
1891 | spin_lock_irq(&tu->qlock); | |
1892 | tu->qused--; | |
1893 | } | |
1894 | spin_unlock_irq(&tu->qlock); | |
1895 | _error: | |
1896 | return result > 0 ? result : err; | |
1897 | } | |
1898 | ||
1899 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1900 | { | |
1901 | unsigned int mask; | |
53d2f744 | 1902 | struct snd_timer_user *tu; |
1da177e4 LT |
1903 | |
1904 | tu = file->private_data; | |
1905 | ||
1906 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1907 | |
1da177e4 LT |
1908 | mask = 0; |
1909 | if (tu->qused) | |
1910 | mask |= POLLIN | POLLRDNORM; | |
1911 | ||
1912 | return mask; | |
1913 | } | |
1914 | ||
1915 | #ifdef CONFIG_COMPAT | |
1916 | #include "timer_compat.c" | |
1917 | #else | |
1918 | #define snd_timer_user_ioctl_compat NULL | |
1919 | #endif | |
1920 | ||
9c2e08c5 | 1921 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
1922 | { |
1923 | .owner = THIS_MODULE, | |
1924 | .read = snd_timer_user_read, | |
1925 | .open = snd_timer_user_open, | |
1926 | .release = snd_timer_user_release, | |
1927 | .poll = snd_timer_user_poll, | |
1928 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1929 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1930 | .fasync = snd_timer_user_fasync, | |
1931 | }; | |
1932 | ||
1da177e4 LT |
1933 | /* |
1934 | * ENTRY functions | |
1935 | */ | |
1936 | ||
1da177e4 LT |
1937 | static int __init alsa_timer_init(void) |
1938 | { | |
1939 | int err; | |
1da177e4 LT |
1940 | |
1941 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS | |
6b172a85 CL |
1942 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1943 | "system timer"); | |
1da177e4 | 1944 | #endif |
e28563cc | 1945 | |
1da177e4 | 1946 | if ((err = snd_timer_register_system()) < 0) |
6b172a85 CL |
1947 | snd_printk(KERN_ERR "unable to register system timer (%i)\n", |
1948 | err); | |
f87135f5 CL |
1949 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1950 | &snd_timer_f_ops, NULL, "timer")) < 0) | |
6b172a85 CL |
1951 | snd_printk(KERN_ERR "unable to register timer device (%i)\n", |
1952 | err); | |
e28563cc | 1953 | snd_timer_proc_init(); |
1da177e4 LT |
1954 | return 0; |
1955 | } | |
1956 | ||
1957 | static void __exit alsa_timer_exit(void) | |
1958 | { | |
1959 | struct list_head *p, *n; | |
1960 | ||
1961 | snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); | |
1962 | /* unregister the system timer */ | |
1963 | list_for_each_safe(p, n, &snd_timer_list) { | |
53d2f744 | 1964 | struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); |
c461482c | 1965 | snd_timer_free(timer); |
1da177e4 | 1966 | } |
e28563cc | 1967 | snd_timer_proc_done(); |
1da177e4 LT |
1968 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
1969 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
1970 | #endif | |
1971 | } | |
1972 | ||
1973 | module_init(alsa_timer_init) | |
1974 | module_exit(alsa_timer_exit) | |
1975 | ||
1976 | EXPORT_SYMBOL(snd_timer_open); | |
1977 | EXPORT_SYMBOL(snd_timer_close); | |
1978 | EXPORT_SYMBOL(snd_timer_resolution); | |
1979 | EXPORT_SYMBOL(snd_timer_start); | |
1980 | EXPORT_SYMBOL(snd_timer_stop); | |
1981 | EXPORT_SYMBOL(snd_timer_continue); | |
1982 | EXPORT_SYMBOL(snd_timer_pause); | |
1983 | EXPORT_SYMBOL(snd_timer_new); | |
1984 | EXPORT_SYMBOL(snd_timer_notify); | |
1985 | EXPORT_SYMBOL(snd_timer_global_new); | |
1986 | EXPORT_SYMBOL(snd_timer_global_free); | |
1987 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 1988 | EXPORT_SYMBOL(snd_timer_interrupt); |