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