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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
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 | ||
ee2da997 | 149 | #ifdef CONFIG_MODULES |
1da177e4 | 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 | 261 | timer = snd_timer_find(tid); |
ee2da997 JB |
262 | #ifdef CONFIG_MODULES |
263 | if (!timer) { | |
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 | 308 | |
7eaa943c TI |
309 | if (snd_BUG_ON(!timer)) |
310 | return -ENXIO; | |
1da177e4 LT |
311 | |
312 | /* force to stop the timer */ | |
313 | snd_timer_stop(timeri); | |
314 | ||
315 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
316 | /* wait, until the active callback is finished */ | |
317 | spin_lock_irq(&slave_active_lock); | |
318 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
319 | spin_unlock_irq(&slave_active_lock); | |
320 | udelay(10); | |
321 | spin_lock_irq(&slave_active_lock); | |
322 | } | |
323 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 324 | mutex_lock(®ister_mutex); |
1da177e4 | 325 | list_del(&timeri->open_list); |
1a60d4c5 | 326 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
327 | } else { |
328 | timer = timeri->timer; | |
329 | /* wait, until the active callback is finished */ | |
330 | spin_lock_irq(&timer->lock); | |
331 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
332 | spin_unlock_irq(&timer->lock); | |
333 | udelay(10); | |
334 | spin_lock_irq(&timer->lock); | |
335 | } | |
336 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 337 | mutex_lock(®ister_mutex); |
1da177e4 | 338 | list_del(&timeri->open_list); |
6b172a85 CL |
339 | if (timer && list_empty(&timer->open_list_head) && |
340 | timer->hw.close) | |
1da177e4 LT |
341 | timer->hw.close(timer); |
342 | /* remove slave links */ | |
9244b2c3 JB |
343 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
344 | open_list) { | |
1da177e4 LT |
345 | spin_lock_irq(&slave_active_lock); |
346 | _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); | |
9244b2c3 | 347 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
348 | slave->master = NULL; |
349 | slave->timer = NULL; | |
350 | spin_unlock_irq(&slave_active_lock); | |
351 | } | |
1a60d4c5 | 352 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
353 | } |
354 | if (timeri->private_free) | |
355 | timeri->private_free(timeri); | |
356 | kfree(timeri->owner); | |
357 | kfree(timeri); | |
de24214d CL |
358 | if (timer) |
359 | module_put(timer->module); | |
1da177e4 LT |
360 | return 0; |
361 | } | |
362 | ||
53d2f744 | 363 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 364 | { |
53d2f744 | 365 | struct snd_timer * timer; |
1da177e4 LT |
366 | |
367 | if (timeri == NULL) | |
368 | return 0; | |
369 | if ((timer = timeri->timer) != NULL) { | |
370 | if (timer->hw.c_resolution) | |
371 | return timer->hw.c_resolution(timer); | |
372 | return timer->hw.resolution; | |
373 | } | |
374 | return 0; | |
375 | } | |
376 | ||
53d2f744 | 377 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 378 | { |
53d2f744 | 379 | struct snd_timer *timer; |
1da177e4 LT |
380 | unsigned long flags; |
381 | unsigned long resolution = 0; | |
53d2f744 | 382 | struct snd_timer_instance *ts; |
1da177e4 LT |
383 | struct timespec tstamp; |
384 | ||
b751eef1 JK |
385 | if (timer_tstamp_monotonic) |
386 | do_posix_clock_monotonic_gettime(&tstamp); | |
387 | else | |
388 | getnstimeofday(&tstamp); | |
7eaa943c TI |
389 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
390 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
391 | return; | |
6b172a85 CL |
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 | ||
7eaa943c TI |
479 | if (snd_BUG_ON(!timeri)) |
480 | return -ENXIO; | |
1da177e4 LT |
481 | |
482 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
483 | if (!keep_flag) { | |
484 | spin_lock_irqsave(&slave_active_lock, flags); | |
485 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
486 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
487 | } | |
488 | goto __end; | |
489 | } | |
490 | timer = timeri->timer; | |
491 | if (!timer) | |
492 | return -EINVAL; | |
493 | spin_lock_irqsave(&timer->lock, flags); | |
494 | list_del_init(&timeri->ack_list); | |
495 | list_del_init(&timeri->active_list); | |
496 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
497 | !(--timer->running)) { | |
498 | timer->hw.stop(timer); | |
499 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
500 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
501 | snd_timer_reschedule(timer, 0); | |
502 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
503 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
504 | timer->hw.start(timer); | |
505 | } | |
506 | } | |
507 | } | |
508 | if (!keep_flag) | |
6b172a85 CL |
509 | timeri->flags &= |
510 | ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); | |
1da177e4 LT |
511 | spin_unlock_irqrestore(&timer->lock, flags); |
512 | __end: | |
513 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
514 | snd_timer_notify1(timeri, event); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | /* | |
519 | * stop the timer instance. | |
520 | * | |
521 | * do not call this from the timer callback! | |
522 | */ | |
53d2f744 | 523 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 524 | { |
53d2f744 | 525 | struct snd_timer *timer; |
1da177e4 LT |
526 | unsigned long flags; |
527 | int err; | |
528 | ||
529 | err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); | |
530 | if (err < 0) | |
531 | return err; | |
532 | timer = timeri->timer; | |
533 | spin_lock_irqsave(&timer->lock, flags); | |
534 | timeri->cticks = timeri->ticks; | |
535 | timeri->pticks = 0; | |
536 | spin_unlock_irqrestore(&timer->lock, flags); | |
537 | return 0; | |
538 | } | |
539 | ||
540 | /* | |
541 | * start again.. the tick is kept. | |
542 | */ | |
53d2f744 | 543 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 544 | { |
53d2f744 | 545 | struct snd_timer *timer; |
1da177e4 LT |
546 | int result = -EINVAL; |
547 | unsigned long flags; | |
548 | ||
549 | if (timeri == NULL) | |
550 | return result; | |
551 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
552 | return snd_timer_start_slave(timeri); | |
553 | timer = timeri->timer; | |
554 | if (! timer) | |
555 | return -EINVAL; | |
556 | spin_lock_irqsave(&timer->lock, flags); | |
557 | if (!timeri->cticks) | |
558 | timeri->cticks = 1; | |
559 | timeri->pticks = 0; | |
560 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
561 | spin_unlock_irqrestore(&timer->lock, flags); | |
562 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
563 | return result; | |
564 | } | |
565 | ||
566 | /* | |
567 | * pause.. remember the ticks left | |
568 | */ | |
53d2f744 | 569 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 LT |
570 | { |
571 | return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); | |
572 | } | |
573 | ||
574 | /* | |
575 | * reschedule the timer | |
576 | * | |
577 | * start pending instances and check the scheduling ticks. | |
578 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
579 | */ | |
53d2f744 | 580 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 581 | { |
53d2f744 | 582 | struct snd_timer_instance *ti; |
1da177e4 | 583 | unsigned long ticks = ~0UL; |
1da177e4 | 584 | |
9244b2c3 | 585 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
586 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
587 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
588 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
589 | timer->running++; | |
590 | } | |
591 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
592 | if (ticks > ti->cticks) | |
593 | ticks = ti->cticks; | |
594 | } | |
595 | } | |
596 | if (ticks == ~0UL) { | |
597 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
598 | return; | |
599 | } | |
600 | if (ticks > timer->hw.ticks) | |
601 | ticks = timer->hw.ticks; | |
602 | if (ticks_left != ticks) | |
603 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
604 | timer->sticks = ticks; | |
605 | } | |
606 | ||
607 | /* | |
608 | * timer tasklet | |
609 | * | |
610 | */ | |
611 | static void snd_timer_tasklet(unsigned long arg) | |
612 | { | |
53d2f744 TI |
613 | struct snd_timer *timer = (struct snd_timer *) arg; |
614 | struct snd_timer_instance *ti; | |
1da177e4 LT |
615 | struct list_head *p; |
616 | unsigned long resolution, ticks; | |
2999ff5b | 617 | unsigned long flags; |
1da177e4 | 618 | |
2999ff5b | 619 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
620 | /* now process all callbacks */ |
621 | while (!list_empty(&timer->sack_list_head)) { | |
622 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 623 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
624 | |
625 | /* remove from ack_list and make empty */ | |
626 | list_del_init(p); | |
6b172a85 | 627 | |
1da177e4 LT |
628 | ticks = ti->pticks; |
629 | ti->pticks = 0; | |
630 | resolution = ti->resolution; | |
631 | ||
632 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
633 | spin_unlock(&timer->lock); | |
634 | if (ti->callback) | |
635 | ti->callback(ti, resolution, ticks); | |
636 | spin_lock(&timer->lock); | |
637 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
638 | } | |
2999ff5b | 639 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
640 | } |
641 | ||
642 | /* | |
643 | * timer interrupt | |
644 | * | |
645 | * ticks_left is usually equal to timer->sticks. | |
646 | * | |
647 | */ | |
53d2f744 | 648 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 649 | { |
9244b2c3 | 650 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 651 | unsigned long resolution, ticks; |
9244b2c3 | 652 | struct list_head *p, *ack_list_head; |
b32425ac | 653 | unsigned long flags; |
1da177e4 LT |
654 | int use_tasklet = 0; |
655 | ||
656 | if (timer == NULL) | |
657 | return; | |
658 | ||
b32425ac | 659 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
660 | |
661 | /* remember the current resolution */ | |
662 | if (timer->hw.c_resolution) | |
663 | resolution = timer->hw.c_resolution(timer); | |
664 | else | |
665 | resolution = timer->hw.resolution; | |
666 | ||
667 | /* loop for all active instances | |
9244b2c3 | 668 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
669 | * processed instance is relinked to done_list_head before the callback |
670 | * is called. | |
1da177e4 | 671 | */ |
9244b2c3 JB |
672 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
673 | active_list) { | |
1da177e4 LT |
674 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
675 | continue; | |
676 | ti->pticks += ticks_left; | |
677 | ti->resolution = resolution; | |
678 | if (ti->cticks < ticks_left) | |
679 | ti->cticks = 0; | |
680 | else | |
681 | ti->cticks -= ticks_left; | |
682 | if (ti->cticks) /* not expired */ | |
683 | continue; | |
684 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
685 | ti->cticks = ti->ticks; | |
686 | } else { | |
687 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
688 | if (--timer->running) | |
9244b2c3 | 689 | list_del(&ti->active_list); |
1da177e4 | 690 | } |
6b172a85 CL |
691 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
692 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
693 | ack_list_head = &timer->ack_list_head; | |
694 | else | |
695 | ack_list_head = &timer->sack_list_head; | |
696 | if (list_empty(&ti->ack_list)) | |
697 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 698 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
699 | ts->pticks = ti->pticks; |
700 | ts->resolution = resolution; | |
6b172a85 CL |
701 | if (list_empty(&ts->ack_list)) |
702 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
703 | } |
704 | } | |
705 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 706 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
707 | if (timer->running) { |
708 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
709 | timer->hw.stop(timer); | |
710 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
711 | } | |
712 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
713 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
714 | /* restart timer */ | |
715 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
716 | timer->hw.start(timer); | |
717 | } | |
718 | } else { | |
719 | timer->hw.stop(timer); | |
720 | } | |
721 | ||
722 | /* now process all fast callbacks */ | |
723 | while (!list_empty(&timer->ack_list_head)) { | |
724 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 725 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 726 | |
1da177e4 LT |
727 | /* remove from ack_list and make empty */ |
728 | list_del_init(p); | |
6b172a85 | 729 | |
1da177e4 LT |
730 | ticks = ti->pticks; |
731 | ti->pticks = 0; | |
732 | ||
733 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
734 | spin_unlock(&timer->lock); | |
735 | if (ti->callback) | |
736 | ti->callback(ti, resolution, ticks); | |
737 | spin_lock(&timer->lock); | |
738 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
739 | } | |
740 | ||
741 | /* do we have any slow callbacks? */ | |
742 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 743 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
744 | |
745 | if (use_tasklet) | |
746 | tasklet_hi_schedule(&timer->task_queue); | |
747 | } | |
748 | ||
749 | /* | |
750 | ||
751 | */ | |
752 | ||
53d2f744 TI |
753 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
754 | struct snd_timer **rtimer) | |
1da177e4 | 755 | { |
53d2f744 | 756 | struct snd_timer *timer; |
1da177e4 | 757 | int err; |
53d2f744 | 758 | static struct snd_device_ops ops = { |
1da177e4 LT |
759 | .dev_free = snd_timer_dev_free, |
760 | .dev_register = snd_timer_dev_register, | |
c461482c | 761 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
762 | }; |
763 | ||
7eaa943c TI |
764 | if (snd_BUG_ON(!tid)) |
765 | return -EINVAL; | |
766 | if (rtimer) | |
767 | *rtimer = NULL; | |
ca2c0966 | 768 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
73e77ba0 TI |
769 | if (timer == NULL) { |
770 | snd_printk(KERN_ERR "timer: cannot allocate\n"); | |
1da177e4 | 771 | return -ENOMEM; |
73e77ba0 | 772 | } |
1da177e4 LT |
773 | timer->tmr_class = tid->dev_class; |
774 | timer->card = card; | |
775 | timer->tmr_device = tid->device; | |
776 | timer->tmr_subdevice = tid->subdevice; | |
777 | if (id) | |
778 | strlcpy(timer->id, id, sizeof(timer->id)); | |
779 | INIT_LIST_HEAD(&timer->device_list); | |
780 | INIT_LIST_HEAD(&timer->open_list_head); | |
781 | INIT_LIST_HEAD(&timer->active_list_head); | |
782 | INIT_LIST_HEAD(&timer->ack_list_head); | |
783 | INIT_LIST_HEAD(&timer->sack_list_head); | |
784 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
785 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
786 | (unsigned long)timer); | |
1da177e4 | 787 | if (card != NULL) { |
de24214d | 788 | timer->module = card->module; |
6b172a85 CL |
789 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
790 | if (err < 0) { | |
1da177e4 LT |
791 | snd_timer_free(timer); |
792 | return err; | |
793 | } | |
794 | } | |
7eaa943c TI |
795 | if (rtimer) |
796 | *rtimer = timer; | |
1da177e4 LT |
797 | return 0; |
798 | } | |
799 | ||
53d2f744 | 800 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 801 | { |
7eaa943c TI |
802 | if (!timer) |
803 | return 0; | |
c461482c TI |
804 | |
805 | mutex_lock(®ister_mutex); | |
806 | if (! list_empty(&timer->open_list_head)) { | |
807 | struct list_head *p, *n; | |
808 | struct snd_timer_instance *ti; | |
809 | snd_printk(KERN_WARNING "timer %p is busy?\n", timer); | |
810 | list_for_each_safe(p, n, &timer->open_list_head) { | |
811 | list_del_init(p); | |
812 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
813 | ti->timer = NULL; | |
814 | } | |
815 | } | |
816 | list_del(&timer->device_list); | |
817 | mutex_unlock(®ister_mutex); | |
818 | ||
1da177e4 LT |
819 | if (timer->private_free) |
820 | timer->private_free(timer); | |
821 | kfree(timer); | |
822 | return 0; | |
823 | } | |
824 | ||
53d2f744 | 825 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 826 | { |
53d2f744 | 827 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
828 | return snd_timer_free(timer); |
829 | } | |
830 | ||
53d2f744 | 831 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 832 | { |
53d2f744 TI |
833 | struct snd_timer *timer = dev->device_data; |
834 | struct snd_timer *timer1; | |
1da177e4 | 835 | |
7eaa943c TI |
836 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
837 | return -ENXIO; | |
1da177e4 LT |
838 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
839 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
840 | return -EINVAL; | |
841 | ||
1a60d4c5 | 842 | mutex_lock(®ister_mutex); |
9244b2c3 | 843 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
844 | if (timer1->tmr_class > timer->tmr_class) |
845 | break; | |
846 | if (timer1->tmr_class < timer->tmr_class) | |
847 | continue; | |
848 | if (timer1->card && timer->card) { | |
849 | if (timer1->card->number > timer->card->number) | |
850 | break; | |
851 | if (timer1->card->number < timer->card->number) | |
852 | continue; | |
853 | } | |
854 | if (timer1->tmr_device > timer->tmr_device) | |
855 | break; | |
856 | if (timer1->tmr_device < timer->tmr_device) | |
857 | continue; | |
858 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
859 | break; | |
860 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
861 | continue; | |
862 | /* conflicts.. */ | |
1a60d4c5 | 863 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
864 | return -EBUSY; |
865 | } | |
9244b2c3 | 866 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 867 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
868 | return 0; |
869 | } | |
870 | ||
c461482c | 871 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 872 | { |
c461482c | 873 | struct snd_timer *timer = device->device_data; |
1a60d4c5 | 874 | mutex_lock(®ister_mutex); |
c461482c | 875 | list_del_init(&timer->device_list); |
1a60d4c5 | 876 | mutex_unlock(®ister_mutex); |
c461482c | 877 | return 0; |
1da177e4 LT |
878 | } |
879 | ||
53d2f744 | 880 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
881 | { |
882 | unsigned long flags; | |
883 | unsigned long resolution = 0; | |
53d2f744 | 884 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 885 | |
7c22f1aa TI |
886 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
887 | return; | |
7eaa943c TI |
888 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
889 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
890 | return; | |
1da177e4 | 891 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
892 | if (event == SNDRV_TIMER_EVENT_MSTART || |
893 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
894 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
895 | if (timer->hw.c_resolution) |
896 | resolution = timer->hw.c_resolution(timer); | |
897 | else | |
898 | resolution = timer->hw.resolution; | |
899 | } | |
9244b2c3 | 900 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
901 | if (ti->ccallback) |
902 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 903 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
904 | if (ts->ccallback) |
905 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
906 | } |
907 | spin_unlock_irqrestore(&timer->lock, flags); | |
908 | } | |
909 | ||
910 | /* | |
911 | * exported functions for global timers | |
912 | */ | |
53d2f744 | 913 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 914 | { |
53d2f744 | 915 | struct snd_timer_id tid; |
6b172a85 | 916 | |
1da177e4 LT |
917 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
918 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
919 | tid.card = -1; | |
920 | tid.device = device; | |
921 | tid.subdevice = 0; | |
922 | return snd_timer_new(NULL, id, &tid, rtimer); | |
923 | } | |
924 | ||
53d2f744 | 925 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
926 | { |
927 | return snd_timer_free(timer); | |
928 | } | |
929 | ||
53d2f744 | 930 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 931 | { |
53d2f744 | 932 | struct snd_device dev; |
1da177e4 LT |
933 | |
934 | memset(&dev, 0, sizeof(dev)); | |
935 | dev.device_data = timer; | |
936 | return snd_timer_dev_register(&dev); | |
937 | } | |
938 | ||
6b172a85 | 939 | /* |
1da177e4 LT |
940 | * System timer |
941 | */ | |
942 | ||
943 | struct snd_timer_system_private { | |
944 | struct timer_list tlist; | |
1da177e4 LT |
945 | unsigned long last_expires; |
946 | unsigned long last_jiffies; | |
947 | unsigned long correction; | |
948 | }; | |
949 | ||
1da177e4 LT |
950 | static void snd_timer_s_function(unsigned long data) |
951 | { | |
53d2f744 | 952 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
953 | struct snd_timer_system_private *priv = timer->private_data; |
954 | unsigned long jiff = jiffies; | |
955 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 956 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
957 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
958 | } | |
959 | ||
53d2f744 | 960 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
961 | { |
962 | struct snd_timer_system_private *priv; | |
963 | unsigned long njiff; | |
964 | ||
965 | priv = (struct snd_timer_system_private *) timer->private_data; | |
966 | njiff = (priv->last_jiffies = jiffies); | |
967 | if (priv->correction > timer->sticks - 1) { | |
968 | priv->correction -= timer->sticks - 1; | |
969 | njiff++; | |
970 | } else { | |
971 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 972 | priv->correction = 0; |
1da177e4 LT |
973 | } |
974 | priv->last_expires = priv->tlist.expires = njiff; | |
975 | add_timer(&priv->tlist); | |
976 | return 0; | |
977 | } | |
978 | ||
53d2f744 | 979 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
980 | { |
981 | struct snd_timer_system_private *priv; | |
982 | unsigned long jiff; | |
983 | ||
984 | priv = (struct snd_timer_system_private *) timer->private_data; | |
985 | del_timer(&priv->tlist); | |
986 | jiff = jiffies; | |
987 | if (time_before(jiff, priv->last_expires)) | |
988 | timer->sticks = priv->last_expires - jiff; | |
989 | else | |
990 | timer->sticks = 1; | |
de2696d8 | 991 | priv->correction = 0; |
1da177e4 LT |
992 | return 0; |
993 | } | |
994 | ||
53d2f744 | 995 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
996 | { |
997 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
998 | .resolution = 1000000000L / HZ, | |
999 | .ticks = 10000000L, | |
1000 | .start = snd_timer_s_start, | |
1001 | .stop = snd_timer_s_stop | |
1002 | }; | |
1003 | ||
53d2f744 | 1004 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1005 | { |
1006 | kfree(timer->private_data); | |
1007 | } | |
1008 | ||
1009 | static int snd_timer_register_system(void) | |
1010 | { | |
53d2f744 | 1011 | struct snd_timer *timer; |
1da177e4 LT |
1012 | struct snd_timer_system_private *priv; |
1013 | int err; | |
1014 | ||
6b172a85 CL |
1015 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1016 | if (err < 0) | |
1da177e4 LT |
1017 | return err; |
1018 | strcpy(timer->name, "system timer"); | |
1019 | timer->hw = snd_timer_system; | |
ca2c0966 | 1020 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1021 | if (priv == NULL) { |
1022 | snd_timer_free(timer); | |
1023 | return -ENOMEM; | |
1024 | } | |
1025 | init_timer(&priv->tlist); | |
1026 | priv->tlist.function = snd_timer_s_function; | |
1027 | priv->tlist.data = (unsigned long) timer; | |
1028 | timer->private_data = priv; | |
1029 | timer->private_free = snd_timer_free_system; | |
1030 | return snd_timer_global_register(timer); | |
1031 | } | |
1032 | ||
e28563cc | 1033 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1034 | /* |
1035 | * Info interface | |
1036 | */ | |
1037 | ||
53d2f744 TI |
1038 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1039 | struct snd_info_buffer *buffer) | |
1da177e4 | 1040 | { |
53d2f744 TI |
1041 | struct snd_timer *timer; |
1042 | struct snd_timer_instance *ti; | |
1da177e4 | 1043 | |
1a60d4c5 | 1044 | mutex_lock(®ister_mutex); |
9244b2c3 | 1045 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
1046 | switch (timer->tmr_class) { |
1047 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1048 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1049 | break; | |
1050 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1051 | snd_iprintf(buffer, "C%i-%i: ", |
1052 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1053 | break; |
1054 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1055 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1056 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1057 | break; |
1058 | default: | |
6b172a85 CL |
1059 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1060 | timer->card ? timer->card->number : -1, | |
1061 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1062 | } |
1063 | snd_iprintf(buffer, "%s :", timer->name); | |
1064 | if (timer->hw.resolution) | |
6b172a85 CL |
1065 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1066 | timer->hw.resolution / 1000, | |
1067 | timer->hw.resolution % 1000, | |
1068 | timer->hw.ticks); | |
1da177e4 LT |
1069 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1070 | snd_iprintf(buffer, " SLAVE"); | |
1071 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1072 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1073 | snd_iprintf(buffer, " Client %s : %s\n", |
1074 | ti->owner ? ti->owner : "unknown", | |
1075 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1076 | SNDRV_TIMER_IFLG_RUNNING) | |
1077 | ? "running" : "stopped"); | |
1da177e4 | 1078 | } |
1a60d4c5 | 1079 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1080 | } |
1081 | ||
6581f4e7 | 1082 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1083 | |
1084 | static void __init snd_timer_proc_init(void) | |
1085 | { | |
1086 | struct snd_info_entry *entry; | |
1087 | ||
1088 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1089 | if (entry != NULL) { | |
e28563cc TI |
1090 | entry->c.text.read = snd_timer_proc_read; |
1091 | if (snd_info_register(entry) < 0) { | |
1092 | snd_info_free_entry(entry); | |
1093 | entry = NULL; | |
1094 | } | |
1095 | } | |
1096 | snd_timer_proc_entry = entry; | |
1097 | } | |
1098 | ||
1099 | static void __exit snd_timer_proc_done(void) | |
1100 | { | |
746d4a02 | 1101 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc TI |
1102 | } |
1103 | #else /* !CONFIG_PROC_FS */ | |
1104 | #define snd_timer_proc_init() | |
1105 | #define snd_timer_proc_done() | |
1106 | #endif | |
1107 | ||
1da177e4 LT |
1108 | /* |
1109 | * USER SPACE interface | |
1110 | */ | |
1111 | ||
53d2f744 | 1112 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1113 | unsigned long resolution, |
1114 | unsigned long ticks) | |
1115 | { | |
53d2f744 TI |
1116 | struct snd_timer_user *tu = timeri->callback_data; |
1117 | struct snd_timer_read *r; | |
1da177e4 | 1118 | int prev; |
6b172a85 | 1119 | |
1da177e4 LT |
1120 | spin_lock(&tu->qlock); |
1121 | if (tu->qused > 0) { | |
1122 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1123 | r = &tu->queue[prev]; | |
1124 | if (r->resolution == resolution) { | |
1125 | r->ticks += ticks; | |
1126 | goto __wake; | |
1127 | } | |
1128 | } | |
1129 | if (tu->qused >= tu->queue_size) { | |
1130 | tu->overrun++; | |
1131 | } else { | |
1132 | r = &tu->queue[tu->qtail++]; | |
1133 | tu->qtail %= tu->queue_size; | |
1134 | r->resolution = resolution; | |
1135 | r->ticks = ticks; | |
1136 | tu->qused++; | |
1137 | } | |
1138 | __wake: | |
1139 | spin_unlock(&tu->qlock); | |
1140 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1141 | wake_up(&tu->qchange_sleep); | |
1142 | } | |
1143 | ||
53d2f744 TI |
1144 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1145 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1146 | { |
1147 | if (tu->qused >= tu->queue_size) { | |
1148 | tu->overrun++; | |
1149 | } else { | |
1150 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1151 | tu->qtail %= tu->queue_size; | |
1152 | tu->qused++; | |
1153 | } | |
1154 | } | |
1155 | ||
53d2f744 TI |
1156 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1157 | int event, | |
1da177e4 LT |
1158 | struct timespec *tstamp, |
1159 | unsigned long resolution) | |
1160 | { | |
53d2f744 TI |
1161 | struct snd_timer_user *tu = timeri->callback_data; |
1162 | struct snd_timer_tread r1; | |
1da177e4 | 1163 | |
6b172a85 CL |
1164 | if (event >= SNDRV_TIMER_EVENT_START && |
1165 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1166 | tu->tstamp = *tstamp; |
1167 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1168 | return; | |
1169 | r1.event = event; | |
1170 | r1.tstamp = *tstamp; | |
1171 | r1.val = resolution; | |
1172 | spin_lock(&tu->qlock); | |
1173 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1174 | spin_unlock(&tu->qlock); | |
1175 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1176 | wake_up(&tu->qchange_sleep); | |
1177 | } | |
1178 | ||
53d2f744 | 1179 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1180 | unsigned long resolution, |
1181 | unsigned long ticks) | |
1182 | { | |
53d2f744 TI |
1183 | struct snd_timer_user *tu = timeri->callback_data; |
1184 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1185 | struct timespec tstamp; |
1186 | int prev, append = 0; | |
1187 | ||
07799e75 | 1188 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1189 | spin_lock(&tu->qlock); |
6b172a85 CL |
1190 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1191 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1192 | spin_unlock(&tu->qlock); |
1193 | return; | |
1194 | } | |
b751eef1 JK |
1195 | if (tu->last_resolution != resolution || ticks > 0) { |
1196 | if (timer_tstamp_monotonic) | |
1197 | do_posix_clock_monotonic_gettime(&tstamp); | |
1198 | else | |
1199 | getnstimeofday(&tstamp); | |
1200 | } | |
6b172a85 CL |
1201 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1202 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1203 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1204 | r1.tstamp = tstamp; | |
1205 | r1.val = resolution; | |
1206 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1207 | tu->last_resolution = resolution; | |
1208 | append++; | |
1209 | } | |
1210 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1211 | goto __wake; | |
1212 | if (ticks == 0) | |
1213 | goto __wake; | |
1214 | if (tu->qused > 0) { | |
1215 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1216 | r = &tu->tqueue[prev]; | |
1217 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1218 | r->tstamp = tstamp; | |
1219 | r->val += ticks; | |
1220 | append++; | |
1221 | goto __wake; | |
1222 | } | |
1223 | } | |
1224 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1225 | r1.tstamp = tstamp; | |
1226 | r1.val = ticks; | |
1227 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1228 | append++; | |
1229 | __wake: | |
1230 | spin_unlock(&tu->qlock); | |
1231 | if (append == 0) | |
1232 | return; | |
1233 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1234 | wake_up(&tu->qchange_sleep); | |
1235 | } | |
1236 | ||
1237 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1238 | { | |
53d2f744 | 1239 | struct snd_timer_user *tu; |
6b172a85 | 1240 | |
ca2c0966 | 1241 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1242 | if (tu == NULL) |
1243 | return -ENOMEM; | |
1244 | spin_lock_init(&tu->qlock); | |
1245 | init_waitqueue_head(&tu->qchange_sleep); | |
1a60d4c5 | 1246 | mutex_init(&tu->tread_sem); |
1da177e4 LT |
1247 | tu->ticks = 1; |
1248 | tu->queue_size = 128; | |
53d2f744 | 1249 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1250 | GFP_KERNEL); |
1da177e4 LT |
1251 | if (tu->queue == NULL) { |
1252 | kfree(tu); | |
1253 | return -ENOMEM; | |
1254 | } | |
1255 | file->private_data = tu; | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1260 | { | |
53d2f744 | 1261 | struct snd_timer_user *tu; |
1da177e4 LT |
1262 | |
1263 | if (file->private_data) { | |
1264 | tu = file->private_data; | |
1265 | file->private_data = NULL; | |
1266 | fasync_helper(-1, file, 0, &tu->fasync); | |
1267 | if (tu->timeri) | |
1268 | snd_timer_close(tu->timeri); | |
1269 | kfree(tu->queue); | |
1270 | kfree(tu->tqueue); | |
1271 | kfree(tu); | |
1272 | } | |
1273 | return 0; | |
1274 | } | |
1275 | ||
53d2f744 | 1276 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1277 | { |
1278 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1279 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1280 | id->card = -1; | |
1281 | id->device = -1; | |
1282 | id->subdevice = -1; | |
1283 | } | |
1284 | ||
53d2f744 | 1285 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1286 | { |
1287 | id->dev_class = timer->tmr_class; | |
1288 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1289 | id->card = timer->card ? timer->card->number : -1; | |
1290 | id->device = timer->tmr_device; | |
1291 | id->subdevice = timer->tmr_subdevice; | |
1292 | } | |
1293 | ||
53d2f744 | 1294 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1295 | { |
53d2f744 TI |
1296 | struct snd_timer_id id; |
1297 | struct snd_timer *timer; | |
1da177e4 | 1298 | struct list_head *p; |
6b172a85 | 1299 | |
1da177e4 LT |
1300 | if (copy_from_user(&id, _tid, sizeof(id))) |
1301 | return -EFAULT; | |
1a60d4c5 | 1302 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1303 | if (id.dev_class < 0) { /* first item */ |
1304 | if (list_empty(&snd_timer_list)) | |
1305 | snd_timer_user_zero_id(&id); | |
1306 | else { | |
9dfba380 | 1307 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1308 | struct snd_timer, device_list); |
1da177e4 LT |
1309 | snd_timer_user_copy_id(&id, timer); |
1310 | } | |
1311 | } else { | |
1312 | switch (id.dev_class) { | |
1313 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1314 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1315 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1316 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1317 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1318 | snd_timer_user_copy_id(&id, timer); | |
1319 | break; | |
1320 | } | |
1321 | if (timer->tmr_device >= id.device) { | |
1322 | snd_timer_user_copy_id(&id, timer); | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | if (p == &snd_timer_list) | |
1327 | snd_timer_user_zero_id(&id); | |
1328 | break; | |
1329 | case SNDRV_TIMER_CLASS_CARD: | |
1330 | case SNDRV_TIMER_CLASS_PCM: | |
1331 | if (id.card < 0) { | |
1332 | id.card = 0; | |
1333 | } else { | |
1334 | if (id.card < 0) { | |
1335 | id.card = 0; | |
1336 | } else { | |
1337 | if (id.device < 0) { | |
1338 | id.device = 0; | |
1339 | } else { | |
6b172a85 CL |
1340 | if (id.subdevice < 0) { |
1341 | id.subdevice = 0; | |
1342 | } else { | |
1343 | id.subdevice++; | |
1344 | } | |
1da177e4 LT |
1345 | } |
1346 | } | |
1347 | } | |
1348 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1349 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1350 | if (timer->tmr_class > id.dev_class) { |
1351 | snd_timer_user_copy_id(&id, timer); | |
1352 | break; | |
1353 | } | |
1354 | if (timer->tmr_class < id.dev_class) | |
1355 | continue; | |
1356 | if (timer->card->number > id.card) { | |
1357 | snd_timer_user_copy_id(&id, timer); | |
1358 | break; | |
1359 | } | |
1360 | if (timer->card->number < id.card) | |
1361 | continue; | |
1362 | if (timer->tmr_device > id.device) { | |
1363 | snd_timer_user_copy_id(&id, timer); | |
1364 | break; | |
1365 | } | |
1366 | if (timer->tmr_device < id.device) | |
1367 | continue; | |
1368 | if (timer->tmr_subdevice > id.subdevice) { | |
1369 | snd_timer_user_copy_id(&id, timer); | |
1370 | break; | |
1371 | } | |
1372 | if (timer->tmr_subdevice < id.subdevice) | |
1373 | continue; | |
1374 | snd_timer_user_copy_id(&id, timer); | |
1375 | break; | |
1376 | } | |
1377 | if (p == &snd_timer_list) | |
1378 | snd_timer_user_zero_id(&id); | |
1379 | break; | |
1380 | default: | |
1381 | snd_timer_user_zero_id(&id); | |
1382 | } | |
1383 | } | |
1a60d4c5 | 1384 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1385 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1386 | return -EFAULT; | |
1387 | return 0; | |
6b172a85 | 1388 | } |
1da177e4 | 1389 | |
6b172a85 | 1390 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1391 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1392 | { |
53d2f744 TI |
1393 | struct snd_timer_ginfo *ginfo; |
1394 | struct snd_timer_id tid; | |
1395 | struct snd_timer *t; | |
1da177e4 LT |
1396 | struct list_head *p; |
1397 | int err = 0; | |
1398 | ||
1399 | ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL); | |
1400 | if (! ginfo) | |
1401 | return -ENOMEM; | |
1402 | if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) { | |
1403 | kfree(ginfo); | |
1404 | return -EFAULT; | |
1405 | } | |
1406 | tid = ginfo->tid; | |
1407 | memset(ginfo, 0, sizeof(*ginfo)); | |
1408 | ginfo->tid = tid; | |
1a60d4c5 | 1409 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1410 | t = snd_timer_find(&tid); |
1411 | if (t != NULL) { | |
1412 | ginfo->card = t->card ? t->card->number : -1; | |
1413 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1414 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1415 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1416 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1417 | ginfo->resolution = t->hw.resolution; | |
1418 | if (t->hw.resolution_min > 0) { | |
1419 | ginfo->resolution_min = t->hw.resolution_min; | |
1420 | ginfo->resolution_max = t->hw.resolution_max; | |
1421 | } | |
1422 | list_for_each(p, &t->open_list_head) { | |
1423 | ginfo->clients++; | |
1424 | } | |
1425 | } else { | |
1426 | err = -ENODEV; | |
1427 | } | |
1a60d4c5 | 1428 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1429 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1430 | err = -EFAULT; | |
1431 | kfree(ginfo); | |
1432 | return err; | |
1433 | } | |
1434 | ||
6b172a85 | 1435 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1436 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1437 | { |
53d2f744 TI |
1438 | struct snd_timer_gparams gparams; |
1439 | struct snd_timer *t; | |
1da177e4 LT |
1440 | int err; |
1441 | ||
1442 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1443 | return -EFAULT; | |
1a60d4c5 | 1444 | mutex_lock(®ister_mutex); |
1da177e4 | 1445 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1446 | if (!t) { |
1da177e4 | 1447 | err = -ENODEV; |
6b172a85 CL |
1448 | goto _error; |
1449 | } | |
1450 | if (!list_empty(&t->open_list_head)) { | |
1451 | err = -EBUSY; | |
1452 | goto _error; | |
1453 | } | |
1454 | if (!t->hw.set_period) { | |
1455 | err = -ENOSYS; | |
1456 | goto _error; | |
1da177e4 | 1457 | } |
6b172a85 CL |
1458 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1459 | _error: | |
1a60d4c5 | 1460 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1461 | return err; |
1462 | } | |
1463 | ||
6b172a85 | 1464 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1465 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1466 | { |
53d2f744 TI |
1467 | struct snd_timer_gstatus gstatus; |
1468 | struct snd_timer_id tid; | |
1469 | struct snd_timer *t; | |
1da177e4 LT |
1470 | int err = 0; |
1471 | ||
1472 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1473 | return -EFAULT; | |
1474 | tid = gstatus.tid; | |
1475 | memset(&gstatus, 0, sizeof(gstatus)); | |
1476 | gstatus.tid = tid; | |
1a60d4c5 | 1477 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1478 | t = snd_timer_find(&tid); |
1479 | if (t != NULL) { | |
1480 | if (t->hw.c_resolution) | |
1481 | gstatus.resolution = t->hw.c_resolution(t); | |
1482 | else | |
1483 | gstatus.resolution = t->hw.resolution; | |
1484 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1485 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1486 | &gstatus.resolution_den); | |
1da177e4 LT |
1487 | } else { |
1488 | gstatus.resolution_num = gstatus.resolution; | |
1489 | gstatus.resolution_den = 1000000000uL; | |
1490 | } | |
1491 | } else { | |
1492 | err = -ENODEV; | |
1493 | } | |
1a60d4c5 | 1494 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1495 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1496 | err = -EFAULT; | |
1497 | return err; | |
1498 | } | |
1499 | ||
6b172a85 | 1500 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1501 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1502 | { |
53d2f744 TI |
1503 | struct snd_timer_user *tu; |
1504 | struct snd_timer_select tselect; | |
1da177e4 | 1505 | char str[32]; |
c1935b4d | 1506 | int err = 0; |
6b172a85 | 1507 | |
1da177e4 | 1508 | tu = file->private_data; |
1a60d4c5 | 1509 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1510 | if (tu->timeri) { |
1da177e4 | 1511 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1512 | tu->timeri = NULL; |
1513 | } | |
1514 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1515 | err = -EFAULT; | |
1516 | goto __err; | |
1517 | } | |
1da177e4 LT |
1518 | sprintf(str, "application %i", current->pid); |
1519 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1520 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1521 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1522 | if (err < 0) | |
c1935b4d | 1523 | goto __err; |
1da177e4 | 1524 | |
4d572776 JJ |
1525 | kfree(tu->queue); |
1526 | tu->queue = NULL; | |
1527 | kfree(tu->tqueue); | |
1528 | tu->tqueue = NULL; | |
1da177e4 | 1529 | if (tu->tread) { |
53d2f744 | 1530 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1531 | GFP_KERNEL); |
c1935b4d JK |
1532 | if (tu->tqueue == NULL) |
1533 | err = -ENOMEM; | |
1da177e4 | 1534 | } else { |
53d2f744 | 1535 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1536 | GFP_KERNEL); |
c1935b4d JK |
1537 | if (tu->queue == NULL) |
1538 | err = -ENOMEM; | |
1da177e4 | 1539 | } |
6b172a85 | 1540 | |
c1935b4d JK |
1541 | if (err < 0) { |
1542 | snd_timer_close(tu->timeri); | |
1543 | tu->timeri = NULL; | |
1544 | } else { | |
1545 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1546 | tu->timeri->callback = tu->tread |
1547 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1548 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1549 | tu->timeri->callback_data = (void *)tu; | |
1550 | } | |
1551 | ||
1552 | __err: | |
1a60d4c5 | 1553 | mutex_unlock(&tu->tread_sem); |
c1935b4d | 1554 | return err; |
1da177e4 LT |
1555 | } |
1556 | ||
6b172a85 | 1557 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1558 | struct snd_timer_info __user *_info) |
1da177e4 | 1559 | { |
53d2f744 TI |
1560 | struct snd_timer_user *tu; |
1561 | struct snd_timer_info *info; | |
1562 | struct snd_timer *t; | |
1da177e4 LT |
1563 | int err = 0; |
1564 | ||
1565 | tu = file->private_data; | |
7c64ec34 CL |
1566 | if (!tu->timeri) |
1567 | return -EBADFD; | |
1da177e4 | 1568 | t = tu->timeri->timer; |
7c64ec34 CL |
1569 | if (!t) |
1570 | return -EBADFD; | |
1da177e4 | 1571 | |
ca2c0966 | 1572 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1573 | if (! info) |
1574 | return -ENOMEM; | |
1575 | info->card = t->card ? t->card->number : -1; | |
1576 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1577 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1578 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1579 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1580 | info->resolution = t->hw.resolution; | |
1581 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1582 | err = -EFAULT; | |
1583 | kfree(info); | |
1584 | return err; | |
1585 | } | |
1586 | ||
6b172a85 | 1587 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1588 | struct snd_timer_params __user *_params) |
1da177e4 | 1589 | { |
53d2f744 TI |
1590 | struct snd_timer_user *tu; |
1591 | struct snd_timer_params params; | |
1592 | struct snd_timer *t; | |
1593 | struct snd_timer_read *tr; | |
1594 | struct snd_timer_tread *ttr; | |
1da177e4 | 1595 | int err; |
6b172a85 | 1596 | |
1da177e4 | 1597 | tu = file->private_data; |
7c64ec34 CL |
1598 | if (!tu->timeri) |
1599 | return -EBADFD; | |
1da177e4 | 1600 | t = tu->timeri->timer; |
7c64ec34 CL |
1601 | if (!t) |
1602 | return -EBADFD; | |
1da177e4 LT |
1603 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1604 | return -EFAULT; | |
1605 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1606 | err = -EINVAL; | |
1607 | goto _end; | |
1608 | } | |
6b172a85 CL |
1609 | if (params.queue_size > 0 && |
1610 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1611 | err = -EINVAL; |
1612 | goto _end; | |
1613 | } | |
1614 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1615 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1616 | (1<<SNDRV_TIMER_EVENT_START)| | |
1617 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1618 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1619 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1620 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1621 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1622 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1623 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1624 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1625 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1626 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1627 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1628 | err = -EINVAL; |
1629 | goto _end; | |
1630 | } | |
1631 | snd_timer_stop(tu->timeri); | |
1632 | spin_lock_irq(&t->lock); | |
1633 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1634 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1635 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1636 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1637 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1638 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1639 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1640 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1641 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1642 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1643 | if (params.queue_size > 0 && |
1644 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1645 | if (tu->tread) { |
6b172a85 CL |
1646 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1647 | GFP_KERNEL); | |
1da177e4 LT |
1648 | if (ttr) { |
1649 | kfree(tu->tqueue); | |
1650 | tu->queue_size = params.queue_size; | |
1651 | tu->tqueue = ttr; | |
1652 | } | |
1653 | } else { | |
6b172a85 CL |
1654 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1655 | GFP_KERNEL); | |
1da177e4 LT |
1656 | if (tr) { |
1657 | kfree(tu->queue); | |
1658 | tu->queue_size = params.queue_size; | |
1659 | tu->queue = tr; | |
1660 | } | |
1661 | } | |
1662 | } | |
1663 | tu->qhead = tu->qtail = tu->qused = 0; | |
1664 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1665 | if (tu->tread) { | |
53d2f744 | 1666 | struct snd_timer_tread tread; |
1da177e4 LT |
1667 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1668 | tread.tstamp.tv_sec = 0; | |
1669 | tread.tstamp.tv_nsec = 0; | |
1670 | tread.val = 0; | |
1671 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1672 | } else { | |
53d2f744 | 1673 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1674 | r->resolution = 0; |
1675 | r->ticks = 0; | |
1676 | tu->qused++; | |
1677 | tu->qtail++; | |
1678 | } | |
1da177e4 LT |
1679 | } |
1680 | tu->filter = params.filter; | |
1681 | tu->ticks = params.ticks; | |
1682 | err = 0; | |
1683 | _end: | |
1684 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1685 | return -EFAULT; | |
1686 | return err; | |
1687 | } | |
1688 | ||
6b172a85 | 1689 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1690 | struct snd_timer_status __user *_status) |
1da177e4 | 1691 | { |
53d2f744 TI |
1692 | struct snd_timer_user *tu; |
1693 | struct snd_timer_status status; | |
6b172a85 | 1694 | |
1da177e4 | 1695 | tu = file->private_data; |
7c64ec34 CL |
1696 | if (!tu->timeri) |
1697 | return -EBADFD; | |
1da177e4 LT |
1698 | memset(&status, 0, sizeof(status)); |
1699 | status.tstamp = tu->tstamp; | |
1700 | status.resolution = snd_timer_resolution(tu->timeri); | |
1701 | status.lost = tu->timeri->lost; | |
1702 | status.overrun = tu->overrun; | |
1703 | spin_lock_irq(&tu->qlock); | |
1704 | status.queue = tu->qused; | |
1705 | spin_unlock_irq(&tu->qlock); | |
1706 | if (copy_to_user(_status, &status, sizeof(status))) | |
1707 | return -EFAULT; | |
1708 | return 0; | |
1709 | } | |
1710 | ||
1711 | static int snd_timer_user_start(struct file *file) | |
1712 | { | |
1713 | int err; | |
53d2f744 | 1714 | struct snd_timer_user *tu; |
6b172a85 | 1715 | |
1da177e4 | 1716 | tu = file->private_data; |
7c64ec34 CL |
1717 | if (!tu->timeri) |
1718 | return -EBADFD; | |
1da177e4 LT |
1719 | snd_timer_stop(tu->timeri); |
1720 | tu->timeri->lost = 0; | |
1721 | tu->last_resolution = 0; | |
1722 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1723 | } | |
1724 | ||
1725 | static int snd_timer_user_stop(struct file *file) | |
1726 | { | |
1727 | int err; | |
53d2f744 | 1728 | struct snd_timer_user *tu; |
6b172a85 | 1729 | |
1da177e4 | 1730 | tu = file->private_data; |
7c64ec34 CL |
1731 | if (!tu->timeri) |
1732 | return -EBADFD; | |
1da177e4 LT |
1733 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1734 | } | |
1735 | ||
1736 | static int snd_timer_user_continue(struct file *file) | |
1737 | { | |
1738 | int err; | |
53d2f744 | 1739 | struct snd_timer_user *tu; |
6b172a85 | 1740 | |
1da177e4 | 1741 | tu = file->private_data; |
7c64ec34 CL |
1742 | if (!tu->timeri) |
1743 | return -EBADFD; | |
1da177e4 LT |
1744 | tu->timeri->lost = 0; |
1745 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1746 | } | |
1747 | ||
15790a6b TI |
1748 | static int snd_timer_user_pause(struct file *file) |
1749 | { | |
1750 | int err; | |
53d2f744 | 1751 | struct snd_timer_user *tu; |
6b172a85 | 1752 | |
15790a6b | 1753 | tu = file->private_data; |
7c64ec34 CL |
1754 | if (!tu->timeri) |
1755 | return -EBADFD; | |
d138b445 | 1756 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1757 | } |
1758 | ||
8c50b37c TI |
1759 | enum { |
1760 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1761 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1762 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1763 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1764 | }; | |
1765 | ||
6b172a85 CL |
1766 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1767 | unsigned long arg) | |
1da177e4 | 1768 | { |
53d2f744 | 1769 | struct snd_timer_user *tu; |
1da177e4 LT |
1770 | void __user *argp = (void __user *)arg; |
1771 | int __user *p = argp; | |
6b172a85 | 1772 | |
1da177e4 LT |
1773 | tu = file->private_data; |
1774 | switch (cmd) { | |
1775 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1776 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1777 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1778 | return snd_timer_user_next_device(argp); | |
1779 | case SNDRV_TIMER_IOCTL_TREAD: | |
1780 | { | |
1781 | int xarg; | |
6b172a85 | 1782 | |
1a60d4c5 | 1783 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1784 | if (tu->timeri) { /* too late */ |
1a60d4c5 | 1785 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1786 | return -EBUSY; |
c1935b4d JK |
1787 | } |
1788 | if (get_user(xarg, p)) { | |
1a60d4c5 | 1789 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1790 | return -EFAULT; |
c1935b4d | 1791 | } |
1da177e4 | 1792 | tu->tread = xarg ? 1 : 0; |
1a60d4c5 | 1793 | mutex_unlock(&tu->tread_sem); |
1da177e4 LT |
1794 | return 0; |
1795 | } | |
1796 | case SNDRV_TIMER_IOCTL_GINFO: | |
1797 | return snd_timer_user_ginfo(file, argp); | |
1798 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1799 | return snd_timer_user_gparams(file, argp); | |
1800 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1801 | return snd_timer_user_gstatus(file, argp); | |
1802 | case SNDRV_TIMER_IOCTL_SELECT: | |
1803 | return snd_timer_user_tselect(file, argp); | |
1804 | case SNDRV_TIMER_IOCTL_INFO: | |
1805 | return snd_timer_user_info(file, argp); | |
1806 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1807 | return snd_timer_user_params(file, argp); | |
1808 | case SNDRV_TIMER_IOCTL_STATUS: | |
1809 | return snd_timer_user_status(file, argp); | |
1810 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1811 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1812 | return snd_timer_user_start(file); |
1813 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1814 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1815 | return snd_timer_user_stop(file); |
1816 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1817 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1818 | return snd_timer_user_continue(file); |
15790a6b | 1819 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1820 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1821 | return snd_timer_user_pause(file); |
1da177e4 LT |
1822 | } |
1823 | return -ENOTTY; | |
1824 | } | |
1825 | ||
1826 | static int snd_timer_user_fasync(int fd, struct file * file, int on) | |
1827 | { | |
53d2f744 | 1828 | struct snd_timer_user *tu; |
1da177e4 | 1829 | int err; |
6b172a85 | 1830 | |
1da177e4 LT |
1831 | tu = file->private_data; |
1832 | err = fasync_helper(fd, file, on, &tu->fasync); | |
1833 | if (err < 0) | |
1834 | return err; | |
1835 | return 0; | |
1836 | } | |
1837 | ||
6b172a85 CL |
1838 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1839 | size_t count, loff_t *offset) | |
1da177e4 | 1840 | { |
53d2f744 | 1841 | struct snd_timer_user *tu; |
1da177e4 LT |
1842 | long result = 0, unit; |
1843 | int err = 0; | |
6b172a85 | 1844 | |
1da177e4 | 1845 | tu = file->private_data; |
53d2f744 | 1846 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1847 | spin_lock_irq(&tu->qlock); |
1848 | while ((long)count - result >= unit) { | |
1849 | while (!tu->qused) { | |
1850 | wait_queue_t wait; | |
1851 | ||
1852 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1853 | err = -EAGAIN; | |
1854 | break; | |
1855 | } | |
1856 | ||
1857 | set_current_state(TASK_INTERRUPTIBLE); | |
1858 | init_waitqueue_entry(&wait, current); | |
1859 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1860 | ||
1861 | spin_unlock_irq(&tu->qlock); | |
1862 | schedule(); | |
1863 | spin_lock_irq(&tu->qlock); | |
1864 | ||
1865 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1866 | ||
1867 | if (signal_pending(current)) { | |
1868 | err = -ERESTARTSYS; | |
1869 | break; | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | spin_unlock_irq(&tu->qlock); | |
1874 | if (err < 0) | |
1875 | goto _error; | |
1876 | ||
1877 | if (tu->tread) { | |
6b172a85 | 1878 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1879 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1880 | err = -EFAULT; |
1881 | goto _error; | |
1882 | } | |
1883 | } else { | |
6b172a85 | 1884 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1885 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1886 | err = -EFAULT; |
1887 | goto _error; | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | tu->qhead %= tu->queue_size; | |
1892 | ||
1893 | result += unit; | |
1894 | buffer += unit; | |
1895 | ||
1896 | spin_lock_irq(&tu->qlock); | |
1897 | tu->qused--; | |
1898 | } | |
1899 | spin_unlock_irq(&tu->qlock); | |
1900 | _error: | |
1901 | return result > 0 ? result : err; | |
1902 | } | |
1903 | ||
1904 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1905 | { | |
1906 | unsigned int mask; | |
53d2f744 | 1907 | struct snd_timer_user *tu; |
1da177e4 LT |
1908 | |
1909 | tu = file->private_data; | |
1910 | ||
1911 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1912 | |
1da177e4 LT |
1913 | mask = 0; |
1914 | if (tu->qused) | |
1915 | mask |= POLLIN | POLLRDNORM; | |
1916 | ||
1917 | return mask; | |
1918 | } | |
1919 | ||
1920 | #ifdef CONFIG_COMPAT | |
1921 | #include "timer_compat.c" | |
1922 | #else | |
1923 | #define snd_timer_user_ioctl_compat NULL | |
1924 | #endif | |
1925 | ||
9c2e08c5 | 1926 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
1927 | { |
1928 | .owner = THIS_MODULE, | |
1929 | .read = snd_timer_user_read, | |
1930 | .open = snd_timer_user_open, | |
1931 | .release = snd_timer_user_release, | |
1932 | .poll = snd_timer_user_poll, | |
1933 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1934 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1935 | .fasync = snd_timer_user_fasync, | |
1936 | }; | |
1937 | ||
1da177e4 LT |
1938 | /* |
1939 | * ENTRY functions | |
1940 | */ | |
1941 | ||
1da177e4 LT |
1942 | static int __init alsa_timer_init(void) |
1943 | { | |
1944 | int err; | |
1da177e4 LT |
1945 | |
1946 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS | |
6b172a85 CL |
1947 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1948 | "system timer"); | |
1da177e4 | 1949 | #endif |
e28563cc | 1950 | |
1da177e4 | 1951 | if ((err = snd_timer_register_system()) < 0) |
6b172a85 CL |
1952 | snd_printk(KERN_ERR "unable to register system timer (%i)\n", |
1953 | err); | |
f87135f5 CL |
1954 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1955 | &snd_timer_f_ops, NULL, "timer")) < 0) | |
6b172a85 CL |
1956 | snd_printk(KERN_ERR "unable to register timer device (%i)\n", |
1957 | err); | |
e28563cc | 1958 | snd_timer_proc_init(); |
1da177e4 LT |
1959 | return 0; |
1960 | } | |
1961 | ||
1962 | static void __exit alsa_timer_exit(void) | |
1963 | { | |
1964 | struct list_head *p, *n; | |
1965 | ||
1966 | snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); | |
1967 | /* unregister the system timer */ | |
1968 | list_for_each_safe(p, n, &snd_timer_list) { | |
53d2f744 | 1969 | struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); |
c461482c | 1970 | snd_timer_free(timer); |
1da177e4 | 1971 | } |
e28563cc | 1972 | snd_timer_proc_done(); |
1da177e4 LT |
1973 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
1974 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
1975 | #endif | |
1976 | } | |
1977 | ||
1978 | module_init(alsa_timer_init) | |
1979 | module_exit(alsa_timer_exit) | |
1980 | ||
1981 | EXPORT_SYMBOL(snd_timer_open); | |
1982 | EXPORT_SYMBOL(snd_timer_close); | |
1983 | EXPORT_SYMBOL(snd_timer_resolution); | |
1984 | EXPORT_SYMBOL(snd_timer_start); | |
1985 | EXPORT_SYMBOL(snd_timer_stop); | |
1986 | EXPORT_SYMBOL(snd_timer_continue); | |
1987 | EXPORT_SYMBOL(snd_timer_pause); | |
1988 | EXPORT_SYMBOL(snd_timer_new); | |
1989 | EXPORT_SYMBOL(snd_timer_notify); | |
1990 | EXPORT_SYMBOL(snd_timer_global_new); | |
1991 | EXPORT_SYMBOL(snd_timer_global_free); | |
1992 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 1993 | EXPORT_SYMBOL(snd_timer_interrupt); |