Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <sound/driver.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/smp_lock.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
1a60d4c5 | 28 | #include <linux/mutex.h> |
1da177e4 | 29 | #include <linux/moduleparam.h> |
543537bd | 30 | #include <linux/string.h> |
1da177e4 LT |
31 | #include <sound/core.h> |
32 | #include <sound/timer.h> | |
33 | #include <sound/control.h> | |
34 | #include <sound/info.h> | |
35 | #include <sound/minors.h> | |
36 | #include <sound/initval.h> | |
37 | #include <linux/kmod.h> | |
38 | #ifdef CONFIG_KERNELD | |
39 | #include <linux/kerneld.h> | |
40 | #endif | |
41 | ||
42 | #if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE) | |
43 | #define DEFAULT_TIMER_LIMIT 3 | |
44 | #elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE) | |
45 | #define DEFAULT_TIMER_LIMIT 2 | |
46 | #else | |
47 | #define DEFAULT_TIMER_LIMIT 1 | |
48 | #endif | |
49 | ||
50 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
51 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Takashi Iwai <tiwai@suse.de>"); | |
52 | MODULE_DESCRIPTION("ALSA timer interface"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | module_param(timer_limit, int, 0444); | |
55 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
56 | ||
53d2f744 TI |
57 | struct snd_timer_user { |
58 | struct snd_timer_instance *timeri; | |
6b172a85 | 59 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
60 | unsigned long ticks; |
61 | unsigned long overrun; | |
62 | int qhead; | |
63 | int qtail; | |
64 | int qused; | |
65 | int queue_size; | |
53d2f744 TI |
66 | struct snd_timer_read *queue; |
67 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
68 | spinlock_t qlock; |
69 | unsigned long last_resolution; | |
70 | unsigned int filter; | |
71 | struct timespec tstamp; /* trigger tstamp */ | |
72 | wait_queue_head_t qchange_sleep; | |
73 | struct fasync_struct *fasync; | |
1a60d4c5 | 74 | struct mutex tread_sem; |
53d2f744 | 75 | }; |
1da177e4 LT |
76 | |
77 | /* list of timers */ | |
78 | static LIST_HEAD(snd_timer_list); | |
79 | ||
80 | /* list of slave instances */ | |
81 | static LIST_HEAD(snd_timer_slave_list); | |
82 | ||
83 | /* lock for slave active lists */ | |
84 | static DEFINE_SPINLOCK(slave_active_lock); | |
85 | ||
1a60d4c5 | 86 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 87 | |
53d2f744 TI |
88 | static int snd_timer_free(struct snd_timer *timer); |
89 | static int snd_timer_dev_free(struct snd_device *device); | |
90 | static int snd_timer_dev_register(struct snd_device *device); | |
91 | static int snd_timer_dev_unregister(struct snd_device *device); | |
1da177e4 | 92 | |
53d2f744 | 93 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
94 | |
95 | /* | |
96 | * create a timer instance with the given owner string. | |
97 | * when timer is not NULL, increments the module counter | |
98 | */ | |
53d2f744 TI |
99 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
100 | struct snd_timer *timer) | |
1da177e4 | 101 | { |
53d2f744 | 102 | struct snd_timer_instance *timeri; |
ca2c0966 | 103 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
104 | if (timeri == NULL) |
105 | return NULL; | |
543537bd | 106 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
107 | if (! timeri->owner) { |
108 | kfree(timeri); | |
109 | return NULL; | |
110 | } | |
111 | INIT_LIST_HEAD(&timeri->open_list); | |
112 | INIT_LIST_HEAD(&timeri->active_list); | |
113 | INIT_LIST_HEAD(&timeri->ack_list); | |
114 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
115 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
116 | ||
117 | timeri->timer = timer; | |
de24214d | 118 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
119 | kfree(timeri->owner); |
120 | kfree(timeri); | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | return timeri; | |
125 | } | |
126 | ||
127 | /* | |
128 | * find a timer instance from the given timer id | |
129 | */ | |
53d2f744 | 130 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 131 | { |
53d2f744 | 132 | struct snd_timer *timer = NULL; |
1da177e4 LT |
133 | struct list_head *p; |
134 | ||
135 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 136 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
137 | |
138 | if (timer->tmr_class != tid->dev_class) | |
139 | continue; | |
140 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
141 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
142 | (timer->card == NULL || | |
143 | timer->card->number != tid->card)) | |
144 | continue; | |
145 | if (timer->tmr_device != tid->device) | |
146 | continue; | |
147 | if (timer->tmr_subdevice != tid->subdevice) | |
148 | continue; | |
149 | return timer; | |
150 | } | |
151 | return NULL; | |
152 | } | |
153 | ||
154 | #ifdef CONFIG_KMOD | |
155 | ||
53d2f744 | 156 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 LT |
157 | { |
158 | if (! current->fs->root) | |
159 | return; | |
160 | switch (tid->dev_class) { | |
161 | case SNDRV_TIMER_CLASS_GLOBAL: | |
162 | if (tid->device < timer_limit) | |
163 | request_module("snd-timer-%i", tid->device); | |
164 | break; | |
165 | case SNDRV_TIMER_CLASS_CARD: | |
166 | case SNDRV_TIMER_CLASS_PCM: | |
167 | if (tid->card < snd_ecards_limit) | |
168 | request_module("snd-card-%i", tid->card); | |
169 | break; | |
170 | default: | |
171 | break; | |
172 | } | |
173 | } | |
174 | ||
175 | #endif | |
176 | ||
177 | /* | |
178 | * look for a master instance matching with the slave id of the given slave. | |
179 | * when found, relink the open_link of the slave. | |
180 | * | |
181 | * call this with register_mutex down. | |
182 | */ | |
53d2f744 | 183 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 184 | { |
53d2f744 TI |
185 | struct snd_timer *timer; |
186 | struct snd_timer_instance *master; | |
1da177e4 LT |
187 | struct list_head *p, *q; |
188 | ||
189 | /* FIXME: it's really dumb to look up all entries.. */ | |
190 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 191 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 | 192 | list_for_each(q, &timer->open_list_head) { |
53d2f744 | 193 | master = list_entry(q, struct snd_timer_instance, open_list); |
1da177e4 LT |
194 | if (slave->slave_class == master->slave_class && |
195 | slave->slave_id == master->slave_id) { | |
196 | list_del(&slave->open_list); | |
6b172a85 CL |
197 | list_add_tail(&slave->open_list, |
198 | &master->slave_list_head); | |
1da177e4 LT |
199 | spin_lock_irq(&slave_active_lock); |
200 | slave->master = master; | |
201 | slave->timer = master->timer; | |
202 | spin_unlock_irq(&slave_active_lock); | |
203 | return; | |
204 | } | |
205 | } | |
206 | } | |
207 | } | |
208 | ||
209 | /* | |
210 | * look for slave instances matching with the slave id of the given master. | |
211 | * when found, relink the open_link of slaves. | |
212 | * | |
213 | * call this with register_mutex down. | |
214 | */ | |
53d2f744 | 215 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 216 | { |
53d2f744 | 217 | struct snd_timer_instance *slave; |
1da177e4 LT |
218 | struct list_head *p, *n; |
219 | ||
220 | /* check all pending slaves */ | |
221 | list_for_each_safe(p, n, &snd_timer_slave_list) { | |
53d2f744 | 222 | slave = list_entry(p, struct snd_timer_instance, open_list); |
1da177e4 LT |
223 | if (slave->slave_class == master->slave_class && |
224 | slave->slave_id == master->slave_id) { | |
225 | list_del(p); | |
226 | list_add_tail(p, &master->slave_list_head); | |
227 | spin_lock_irq(&slave_active_lock); | |
228 | slave->master = master; | |
229 | slave->timer = master->timer; | |
230 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
231 | list_add_tail(&slave->active_list, |
232 | &master->slave_active_head); | |
1da177e4 LT |
233 | spin_unlock_irq(&slave_active_lock); |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | /* | |
239 | * open a timer instance | |
240 | * when opening a master, the slave id must be here given. | |
241 | */ | |
53d2f744 TI |
242 | int snd_timer_open(struct snd_timer_instance **ti, |
243 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
244 | unsigned int slave_id) |
245 | { | |
53d2f744 TI |
246 | struct snd_timer *timer; |
247 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 248 | |
1da177e4 LT |
249 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
250 | /* open a slave instance */ | |
251 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
252 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
253 | snd_printd("invalid slave class %i\n", tid->dev_sclass); | |
254 | return -EINVAL; | |
255 | } | |
1a60d4c5 | 256 | mutex_lock(®ister_mutex); |
1da177e4 | 257 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 258 | if (!timeri) { |
1a60d4c5 | 259 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
260 | return -ENOMEM; |
261 | } | |
1da177e4 LT |
262 | timeri->slave_class = tid->dev_sclass; |
263 | timeri->slave_id = tid->device; | |
264 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
265 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
266 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 267 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
268 | *ti = timeri; |
269 | return 0; | |
270 | } | |
271 | ||
272 | /* open a master instance */ | |
1a60d4c5 | 273 | mutex_lock(®ister_mutex); |
1da177e4 LT |
274 | timer = snd_timer_find(tid); |
275 | #ifdef CONFIG_KMOD | |
276 | if (timer == NULL) { | |
1a60d4c5 | 277 | mutex_unlock(®ister_mutex); |
1da177e4 | 278 | snd_timer_request(tid); |
1a60d4c5 | 279 | mutex_lock(®ister_mutex); |
1da177e4 LT |
280 | timer = snd_timer_find(tid); |
281 | } | |
282 | #endif | |
2fd43d11 | 283 | if (!timer) { |
1a60d4c5 | 284 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
285 | return -ENODEV; |
286 | } | |
2fd43d11 CL |
287 | if (!list_empty(&timer->open_list_head)) { |
288 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 289 | struct snd_timer_instance, open_list); |
2fd43d11 | 290 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 291 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
292 | return -EBUSY; |
293 | } | |
294 | } | |
295 | timeri = snd_timer_instance_new(owner, timer); | |
296 | if (!timeri) { | |
1a60d4c5 | 297 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
298 | return -ENOMEM; |
299 | } | |
300 | timeri->slave_class = tid->dev_sclass; | |
301 | timeri->slave_id = slave_id; | |
302 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
303 | timer->hw.open(timer); | |
304 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
305 | snd_timer_check_master(timeri); | |
1a60d4c5 | 306 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
307 | *ti = timeri; |
308 | return 0; | |
309 | } | |
310 | ||
53d2f744 TI |
311 | static int _snd_timer_stop(struct snd_timer_instance *timeri, |
312 | int keep_flag, int event); | |
1da177e4 LT |
313 | |
314 | /* | |
315 | * close a timer instance | |
316 | */ | |
53d2f744 | 317 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 318 | { |
53d2f744 | 319 | struct snd_timer *timer = NULL; |
1da177e4 | 320 | struct list_head *p, *n; |
53d2f744 | 321 | struct snd_timer_instance *slave; |
1da177e4 LT |
322 | |
323 | snd_assert(timeri != NULL, return -ENXIO); | |
324 | ||
325 | /* force to stop the timer */ | |
326 | snd_timer_stop(timeri); | |
327 | ||
328 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
329 | /* wait, until the active callback is finished */ | |
330 | spin_lock_irq(&slave_active_lock); | |
331 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
332 | spin_unlock_irq(&slave_active_lock); | |
333 | udelay(10); | |
334 | spin_lock_irq(&slave_active_lock); | |
335 | } | |
336 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 337 | mutex_lock(®ister_mutex); |
1da177e4 | 338 | list_del(&timeri->open_list); |
1a60d4c5 | 339 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
340 | } else { |
341 | timer = timeri->timer; | |
342 | /* wait, until the active callback is finished */ | |
343 | spin_lock_irq(&timer->lock); | |
344 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
345 | spin_unlock_irq(&timer->lock); | |
346 | udelay(10); | |
347 | spin_lock_irq(&timer->lock); | |
348 | } | |
349 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 350 | mutex_lock(®ister_mutex); |
1da177e4 | 351 | list_del(&timeri->open_list); |
6b172a85 CL |
352 | if (timer && list_empty(&timer->open_list_head) && |
353 | timer->hw.close) | |
1da177e4 LT |
354 | timer->hw.close(timer); |
355 | /* remove slave links */ | |
356 | list_for_each_safe(p, n, &timeri->slave_list_head) { | |
53d2f744 | 357 | slave = list_entry(p, struct snd_timer_instance, open_list); |
1da177e4 LT |
358 | spin_lock_irq(&slave_active_lock); |
359 | _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); | |
360 | list_del(p); | |
361 | list_add_tail(p, &snd_timer_slave_list); | |
362 | slave->master = NULL; | |
363 | slave->timer = NULL; | |
364 | spin_unlock_irq(&slave_active_lock); | |
365 | } | |
1a60d4c5 | 366 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
367 | } |
368 | if (timeri->private_free) | |
369 | timeri->private_free(timeri); | |
370 | kfree(timeri->owner); | |
371 | kfree(timeri); | |
de24214d CL |
372 | if (timer) |
373 | module_put(timer->module); | |
1da177e4 LT |
374 | return 0; |
375 | } | |
376 | ||
53d2f744 | 377 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 378 | { |
53d2f744 | 379 | struct snd_timer * timer; |
1da177e4 LT |
380 | |
381 | if (timeri == NULL) | |
382 | return 0; | |
383 | if ((timer = timeri->timer) != NULL) { | |
384 | if (timer->hw.c_resolution) | |
385 | return timer->hw.c_resolution(timer); | |
386 | return timer->hw.resolution; | |
387 | } | |
388 | return 0; | |
389 | } | |
390 | ||
53d2f744 | 391 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 392 | { |
53d2f744 | 393 | struct snd_timer *timer; |
1da177e4 LT |
394 | unsigned long flags; |
395 | unsigned long resolution = 0; | |
53d2f744 | 396 | struct snd_timer_instance *ts; |
1da177e4 LT |
397 | struct list_head *n; |
398 | struct timespec tstamp; | |
399 | ||
07799e75 | 400 | getnstimeofday(&tstamp); |
6b172a85 CL |
401 | snd_assert(event >= SNDRV_TIMER_EVENT_START && |
402 | event <= SNDRV_TIMER_EVENT_PAUSE, return); | |
403 | if (event == SNDRV_TIMER_EVENT_START || | |
404 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
405 | resolution = snd_timer_resolution(ti); |
406 | if (ti->ccallback) | |
407 | ti->ccallback(ti, SNDRV_TIMER_EVENT_START, &tstamp, resolution); | |
408 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) | |
409 | return; | |
410 | timer = ti->timer; | |
411 | if (timer == NULL) | |
412 | return; | |
413 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
414 | return; | |
415 | spin_lock_irqsave(&timer->lock, flags); | |
416 | list_for_each(n, &ti->slave_active_head) { | |
53d2f744 | 417 | ts = list_entry(n, struct snd_timer_instance, active_list); |
1da177e4 LT |
418 | if (ts->ccallback) |
419 | ts->ccallback(ti, event + 100, &tstamp, resolution); | |
420 | } | |
421 | spin_unlock_irqrestore(&timer->lock, flags); | |
422 | } | |
423 | ||
53d2f744 | 424 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
6b172a85 | 425 | unsigned long sticks) |
1da177e4 LT |
426 | { |
427 | list_del(&timeri->active_list); | |
428 | list_add_tail(&timeri->active_list, &timer->active_list_head); | |
429 | if (timer->running) { | |
430 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
431 | goto __start_now; | |
432 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
433 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
434 | return 1; /* delayed start */ | |
435 | } else { | |
436 | timer->sticks = sticks; | |
437 | timer->hw.start(timer); | |
438 | __start_now: | |
439 | timer->running++; | |
440 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
441 | return 0; | |
442 | } | |
443 | } | |
444 | ||
53d2f744 | 445 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
1da177e4 LT |
446 | { |
447 | unsigned long flags; | |
448 | ||
449 | spin_lock_irqsave(&slave_active_lock, flags); | |
450 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
451 | if (timeri->master) | |
6b172a85 CL |
452 | list_add_tail(&timeri->active_list, |
453 | &timeri->master->slave_active_head); | |
1da177e4 LT |
454 | spin_unlock_irqrestore(&slave_active_lock, flags); |
455 | return 1; /* delayed start */ | |
456 | } | |
457 | ||
458 | /* | |
459 | * start the timer instance | |
6b172a85 | 460 | */ |
53d2f744 | 461 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
1da177e4 | 462 | { |
53d2f744 | 463 | struct snd_timer *timer; |
1da177e4 LT |
464 | int result = -EINVAL; |
465 | unsigned long flags; | |
466 | ||
467 | if (timeri == NULL || ticks < 1) | |
468 | return -EINVAL; | |
469 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
470 | result = snd_timer_start_slave(timeri); | |
471 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
472 | return result; | |
473 | } | |
474 | timer = timeri->timer; | |
475 | if (timer == NULL) | |
476 | return -EINVAL; | |
477 | spin_lock_irqsave(&timer->lock, flags); | |
478 | timeri->ticks = timeri->cticks = ticks; | |
479 | timeri->pticks = 0; | |
480 | result = snd_timer_start1(timer, timeri, ticks); | |
481 | spin_unlock_irqrestore(&timer->lock, flags); | |
482 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
483 | return result; | |
484 | } | |
485 | ||
53d2f744 TI |
486 | static int _snd_timer_stop(struct snd_timer_instance * timeri, |
487 | int keep_flag, int event) | |
1da177e4 | 488 | { |
53d2f744 | 489 | struct snd_timer *timer; |
1da177e4 LT |
490 | unsigned long flags; |
491 | ||
492 | snd_assert(timeri != NULL, return -ENXIO); | |
493 | ||
494 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
495 | if (!keep_flag) { | |
496 | spin_lock_irqsave(&slave_active_lock, flags); | |
497 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
498 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
499 | } | |
500 | goto __end; | |
501 | } | |
502 | timer = timeri->timer; | |
503 | if (!timer) | |
504 | return -EINVAL; | |
505 | spin_lock_irqsave(&timer->lock, flags); | |
506 | list_del_init(&timeri->ack_list); | |
507 | list_del_init(&timeri->active_list); | |
508 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
509 | !(--timer->running)) { | |
510 | timer->hw.stop(timer); | |
511 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
512 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
513 | snd_timer_reschedule(timer, 0); | |
514 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
515 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
516 | timer->hw.start(timer); | |
517 | } | |
518 | } | |
519 | } | |
520 | if (!keep_flag) | |
6b172a85 CL |
521 | timeri->flags &= |
522 | ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); | |
1da177e4 LT |
523 | spin_unlock_irqrestore(&timer->lock, flags); |
524 | __end: | |
525 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
526 | snd_timer_notify1(timeri, event); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | /* | |
531 | * stop the timer instance. | |
532 | * | |
533 | * do not call this from the timer callback! | |
534 | */ | |
53d2f744 | 535 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 536 | { |
53d2f744 | 537 | struct snd_timer *timer; |
1da177e4 LT |
538 | unsigned long flags; |
539 | int err; | |
540 | ||
541 | err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); | |
542 | if (err < 0) | |
543 | return err; | |
544 | timer = timeri->timer; | |
545 | spin_lock_irqsave(&timer->lock, flags); | |
546 | timeri->cticks = timeri->ticks; | |
547 | timeri->pticks = 0; | |
548 | spin_unlock_irqrestore(&timer->lock, flags); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | /* | |
553 | * start again.. the tick is kept. | |
554 | */ | |
53d2f744 | 555 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 556 | { |
53d2f744 | 557 | struct snd_timer *timer; |
1da177e4 LT |
558 | int result = -EINVAL; |
559 | unsigned long flags; | |
560 | ||
561 | if (timeri == NULL) | |
562 | return result; | |
563 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
564 | return snd_timer_start_slave(timeri); | |
565 | timer = timeri->timer; | |
566 | if (! timer) | |
567 | return -EINVAL; | |
568 | spin_lock_irqsave(&timer->lock, flags); | |
569 | if (!timeri->cticks) | |
570 | timeri->cticks = 1; | |
571 | timeri->pticks = 0; | |
572 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
573 | spin_unlock_irqrestore(&timer->lock, flags); | |
574 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
575 | return result; | |
576 | } | |
577 | ||
578 | /* | |
579 | * pause.. remember the ticks left | |
580 | */ | |
53d2f744 | 581 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 LT |
582 | { |
583 | return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); | |
584 | } | |
585 | ||
586 | /* | |
587 | * reschedule the timer | |
588 | * | |
589 | * start pending instances and check the scheduling ticks. | |
590 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
591 | */ | |
53d2f744 | 592 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 593 | { |
53d2f744 | 594 | struct snd_timer_instance *ti; |
1da177e4 LT |
595 | unsigned long ticks = ~0UL; |
596 | struct list_head *p; | |
597 | ||
598 | list_for_each(p, &timer->active_list_head) { | |
53d2f744 | 599 | ti = list_entry(p, struct snd_timer_instance, active_list); |
1da177e4 LT |
600 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
601 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
602 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
603 | timer->running++; | |
604 | } | |
605 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
606 | if (ticks > ti->cticks) | |
607 | ticks = ti->cticks; | |
608 | } | |
609 | } | |
610 | if (ticks == ~0UL) { | |
611 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
612 | return; | |
613 | } | |
614 | if (ticks > timer->hw.ticks) | |
615 | ticks = timer->hw.ticks; | |
616 | if (ticks_left != ticks) | |
617 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
618 | timer->sticks = ticks; | |
619 | } | |
620 | ||
621 | /* | |
622 | * timer tasklet | |
623 | * | |
624 | */ | |
625 | static void snd_timer_tasklet(unsigned long arg) | |
626 | { | |
53d2f744 TI |
627 | struct snd_timer *timer = (struct snd_timer *) arg; |
628 | struct snd_timer_instance *ti; | |
1da177e4 LT |
629 | struct list_head *p; |
630 | unsigned long resolution, ticks; | |
631 | ||
632 | spin_lock(&timer->lock); | |
633 | /* now process all callbacks */ | |
634 | while (!list_empty(&timer->sack_list_head)) { | |
635 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 636 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
637 | |
638 | /* remove from ack_list and make empty */ | |
639 | list_del_init(p); | |
6b172a85 | 640 | |
1da177e4 LT |
641 | ticks = ti->pticks; |
642 | ti->pticks = 0; | |
643 | resolution = ti->resolution; | |
644 | ||
645 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
646 | spin_unlock(&timer->lock); | |
647 | if (ti->callback) | |
648 | ti->callback(ti, resolution, ticks); | |
649 | spin_lock(&timer->lock); | |
650 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
651 | } | |
652 | spin_unlock(&timer->lock); | |
653 | } | |
654 | ||
655 | /* | |
656 | * timer interrupt | |
657 | * | |
658 | * ticks_left is usually equal to timer->sticks. | |
659 | * | |
660 | */ | |
53d2f744 | 661 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 662 | { |
53d2f744 | 663 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 664 | unsigned long resolution, ticks; |
6b172a85 | 665 | struct list_head *p, *q, *n, *ack_list_head; |
b32425ac | 666 | unsigned long flags; |
1da177e4 LT |
667 | int use_tasklet = 0; |
668 | ||
669 | if (timer == NULL) | |
670 | return; | |
671 | ||
b32425ac | 672 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
673 | |
674 | /* remember the current resolution */ | |
675 | if (timer->hw.c_resolution) | |
676 | resolution = timer->hw.c_resolution(timer); | |
677 | else | |
678 | resolution = timer->hw.resolution; | |
679 | ||
680 | /* loop for all active instances | |
6b172a85 CL |
681 | * Here we cannot use list_for_each because the active_list of a |
682 | * processed instance is relinked to done_list_head before the callback | |
683 | * is called. | |
1da177e4 LT |
684 | */ |
685 | list_for_each_safe(p, n, &timer->active_list_head) { | |
53d2f744 | 686 | ti = list_entry(p, struct snd_timer_instance, active_list); |
1da177e4 LT |
687 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
688 | continue; | |
689 | ti->pticks += ticks_left; | |
690 | ti->resolution = resolution; | |
691 | if (ti->cticks < ticks_left) | |
692 | ti->cticks = 0; | |
693 | else | |
694 | ti->cticks -= ticks_left; | |
695 | if (ti->cticks) /* not expired */ | |
696 | continue; | |
697 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
698 | ti->cticks = ti->ticks; | |
699 | } else { | |
700 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
701 | if (--timer->running) | |
702 | list_del(p); | |
703 | } | |
6b172a85 CL |
704 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
705 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
706 | ack_list_head = &timer->ack_list_head; | |
707 | else | |
708 | ack_list_head = &timer->sack_list_head; | |
709 | if (list_empty(&ti->ack_list)) | |
710 | list_add_tail(&ti->ack_list, ack_list_head); | |
1da177e4 | 711 | list_for_each(q, &ti->slave_active_head) { |
53d2f744 | 712 | ts = list_entry(q, struct snd_timer_instance, active_list); |
1da177e4 LT |
713 | ts->pticks = ti->pticks; |
714 | ts->resolution = resolution; | |
6b172a85 CL |
715 | if (list_empty(&ts->ack_list)) |
716 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
717 | } |
718 | } | |
719 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
720 | snd_timer_reschedule(timer, ticks_left); | |
721 | if (timer->running) { | |
722 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
723 | timer->hw.stop(timer); | |
724 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
725 | } | |
726 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
727 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
728 | /* restart timer */ | |
729 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
730 | timer->hw.start(timer); | |
731 | } | |
732 | } else { | |
733 | timer->hw.stop(timer); | |
734 | } | |
735 | ||
736 | /* now process all fast callbacks */ | |
737 | while (!list_empty(&timer->ack_list_head)) { | |
738 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 739 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 740 | |
1da177e4 LT |
741 | /* remove from ack_list and make empty */ |
742 | list_del_init(p); | |
6b172a85 | 743 | |
1da177e4 LT |
744 | ticks = ti->pticks; |
745 | ti->pticks = 0; | |
746 | ||
747 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
748 | spin_unlock(&timer->lock); | |
749 | if (ti->callback) | |
750 | ti->callback(ti, resolution, ticks); | |
751 | spin_lock(&timer->lock); | |
752 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
753 | } | |
754 | ||
755 | /* do we have any slow callbacks? */ | |
756 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 757 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
758 | |
759 | if (use_tasklet) | |
760 | tasklet_hi_schedule(&timer->task_queue); | |
761 | } | |
762 | ||
763 | /* | |
764 | ||
765 | */ | |
766 | ||
53d2f744 TI |
767 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
768 | struct snd_timer **rtimer) | |
1da177e4 | 769 | { |
53d2f744 | 770 | struct snd_timer *timer; |
1da177e4 | 771 | int err; |
53d2f744 | 772 | static struct snd_device_ops ops = { |
1da177e4 LT |
773 | .dev_free = snd_timer_dev_free, |
774 | .dev_register = snd_timer_dev_register, | |
775 | .dev_unregister = snd_timer_dev_unregister | |
776 | }; | |
777 | ||
778 | snd_assert(tid != NULL, return -EINVAL); | |
779 | snd_assert(rtimer != NULL, return -EINVAL); | |
780 | *rtimer = NULL; | |
ca2c0966 | 781 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
73e77ba0 TI |
782 | if (timer == NULL) { |
783 | snd_printk(KERN_ERR "timer: cannot allocate\n"); | |
1da177e4 | 784 | return -ENOMEM; |
73e77ba0 | 785 | } |
1da177e4 LT |
786 | timer->tmr_class = tid->dev_class; |
787 | timer->card = card; | |
788 | timer->tmr_device = tid->device; | |
789 | timer->tmr_subdevice = tid->subdevice; | |
790 | if (id) | |
791 | strlcpy(timer->id, id, sizeof(timer->id)); | |
792 | INIT_LIST_HEAD(&timer->device_list); | |
793 | INIT_LIST_HEAD(&timer->open_list_head); | |
794 | INIT_LIST_HEAD(&timer->active_list_head); | |
795 | INIT_LIST_HEAD(&timer->ack_list_head); | |
796 | INIT_LIST_HEAD(&timer->sack_list_head); | |
797 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
798 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
799 | (unsigned long)timer); | |
1da177e4 | 800 | if (card != NULL) { |
de24214d | 801 | timer->module = card->module; |
6b172a85 CL |
802 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
803 | if (err < 0) { | |
1da177e4 LT |
804 | snd_timer_free(timer); |
805 | return err; | |
806 | } | |
807 | } | |
808 | *rtimer = timer; | |
809 | return 0; | |
810 | } | |
811 | ||
53d2f744 | 812 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 LT |
813 | { |
814 | snd_assert(timer != NULL, return -ENXIO); | |
815 | if (timer->private_free) | |
816 | timer->private_free(timer); | |
817 | kfree(timer); | |
818 | return 0; | |
819 | } | |
820 | ||
53d2f744 | 821 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 822 | { |
53d2f744 | 823 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
824 | return snd_timer_free(timer); |
825 | } | |
826 | ||
53d2f744 | 827 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 828 | { |
53d2f744 TI |
829 | struct snd_timer *timer = dev->device_data; |
830 | struct snd_timer *timer1; | |
1da177e4 LT |
831 | struct list_head *p; |
832 | ||
6b172a85 CL |
833 | snd_assert(timer != NULL && timer->hw.start != NULL && |
834 | timer->hw.stop != NULL, return -ENXIO); | |
1da177e4 LT |
835 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
836 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
837 | return -EINVAL; | |
838 | ||
1a60d4c5 | 839 | mutex_lock(®ister_mutex); |
1da177e4 | 840 | list_for_each(p, &snd_timer_list) { |
53d2f744 | 841 | timer1 = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
842 | if (timer1->tmr_class > timer->tmr_class) |
843 | break; | |
844 | if (timer1->tmr_class < timer->tmr_class) | |
845 | continue; | |
846 | if (timer1->card && timer->card) { | |
847 | if (timer1->card->number > timer->card->number) | |
848 | break; | |
849 | if (timer1->card->number < timer->card->number) | |
850 | continue; | |
851 | } | |
852 | if (timer1->tmr_device > timer->tmr_device) | |
853 | break; | |
854 | if (timer1->tmr_device < timer->tmr_device) | |
855 | continue; | |
856 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
857 | break; | |
858 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
859 | continue; | |
860 | /* conflicts.. */ | |
1a60d4c5 | 861 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
862 | return -EBUSY; |
863 | } | |
864 | list_add_tail(&timer->device_list, p); | |
1a60d4c5 | 865 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
866 | return 0; |
867 | } | |
868 | ||
53d2f744 | 869 | static int snd_timer_unregister(struct snd_timer *timer) |
1da177e4 LT |
870 | { |
871 | struct list_head *p, *n; | |
53d2f744 | 872 | struct snd_timer_instance *ti; |
1da177e4 LT |
873 | |
874 | snd_assert(timer != NULL, return -ENXIO); | |
1a60d4c5 | 875 | mutex_lock(®ister_mutex); |
1da177e4 LT |
876 | if (! list_empty(&timer->open_list_head)) { |
877 | snd_printk(KERN_WARNING "timer 0x%lx is busy?\n", (long)timer); | |
878 | list_for_each_safe(p, n, &timer->open_list_head) { | |
879 | list_del_init(p); | |
53d2f744 | 880 | ti = list_entry(p, struct snd_timer_instance, open_list); |
1da177e4 LT |
881 | ti->timer = NULL; |
882 | } | |
883 | } | |
884 | list_del(&timer->device_list); | |
1a60d4c5 | 885 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
886 | return snd_timer_free(timer); |
887 | } | |
888 | ||
53d2f744 | 889 | static int snd_timer_dev_unregister(struct snd_device *device) |
1da177e4 | 890 | { |
53d2f744 | 891 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
892 | return snd_timer_unregister(timer); |
893 | } | |
894 | ||
53d2f744 | 895 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
896 | { |
897 | unsigned long flags; | |
898 | unsigned long resolution = 0; | |
53d2f744 | 899 | struct snd_timer_instance *ti, *ts; |
1da177e4 LT |
900 | struct list_head *p, *n; |
901 | ||
7c22f1aa TI |
902 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
903 | return; | |
6b172a85 CL |
904 | snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && |
905 | event <= SNDRV_TIMER_EVENT_MRESUME, return); | |
1da177e4 | 906 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
907 | if (event == SNDRV_TIMER_EVENT_MSTART || |
908 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
909 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
910 | if (timer->hw.c_resolution) |
911 | resolution = timer->hw.c_resolution(timer); | |
912 | else | |
913 | resolution = timer->hw.resolution; | |
914 | } | |
915 | list_for_each(p, &timer->active_list_head) { | |
53d2f744 | 916 | ti = list_entry(p, struct snd_timer_instance, active_list); |
1da177e4 LT |
917 | if (ti->ccallback) |
918 | ti->ccallback(ti, event, tstamp, resolution); | |
919 | list_for_each(n, &ti->slave_active_head) { | |
53d2f744 | 920 | ts = list_entry(n, struct snd_timer_instance, active_list); |
1da177e4 LT |
921 | if (ts->ccallback) |
922 | ts->ccallback(ts, event, tstamp, resolution); | |
923 | } | |
924 | } | |
925 | spin_unlock_irqrestore(&timer->lock, flags); | |
926 | } | |
927 | ||
928 | /* | |
929 | * exported functions for global timers | |
930 | */ | |
53d2f744 | 931 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 932 | { |
53d2f744 | 933 | struct snd_timer_id tid; |
6b172a85 | 934 | |
1da177e4 LT |
935 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
936 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
937 | tid.card = -1; | |
938 | tid.device = device; | |
939 | tid.subdevice = 0; | |
940 | return snd_timer_new(NULL, id, &tid, rtimer); | |
941 | } | |
942 | ||
53d2f744 | 943 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
944 | { |
945 | return snd_timer_free(timer); | |
946 | } | |
947 | ||
53d2f744 | 948 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 949 | { |
53d2f744 | 950 | struct snd_device dev; |
1da177e4 LT |
951 | |
952 | memset(&dev, 0, sizeof(dev)); | |
953 | dev.device_data = timer; | |
954 | return snd_timer_dev_register(&dev); | |
955 | } | |
956 | ||
53d2f744 | 957 | int snd_timer_global_unregister(struct snd_timer *timer) |
1da177e4 LT |
958 | { |
959 | return snd_timer_unregister(timer); | |
960 | } | |
961 | ||
6b172a85 | 962 | /* |
1da177e4 LT |
963 | * System timer |
964 | */ | |
965 | ||
966 | struct snd_timer_system_private { | |
967 | struct timer_list tlist; | |
968 | struct timer * timer; | |
969 | unsigned long last_expires; | |
970 | unsigned long last_jiffies; | |
971 | unsigned long correction; | |
972 | }; | |
973 | ||
1da177e4 LT |
974 | static void snd_timer_s_function(unsigned long data) |
975 | { | |
53d2f744 | 976 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
977 | struct snd_timer_system_private *priv = timer->private_data; |
978 | unsigned long jiff = jiffies; | |
979 | if (time_after(jiff, priv->last_expires)) | |
980 | priv->correction = (long)jiff - (long)priv->last_expires; | |
981 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); | |
982 | } | |
983 | ||
53d2f744 | 984 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
985 | { |
986 | struct snd_timer_system_private *priv; | |
987 | unsigned long njiff; | |
988 | ||
989 | priv = (struct snd_timer_system_private *) timer->private_data; | |
990 | njiff = (priv->last_jiffies = jiffies); | |
991 | if (priv->correction > timer->sticks - 1) { | |
992 | priv->correction -= timer->sticks - 1; | |
993 | njiff++; | |
994 | } else { | |
995 | njiff += timer->sticks - priv->correction; | |
996 | priv->correction -= timer->sticks; | |
997 | } | |
998 | priv->last_expires = priv->tlist.expires = njiff; | |
999 | add_timer(&priv->tlist); | |
1000 | return 0; | |
1001 | } | |
1002 | ||
53d2f744 | 1003 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1004 | { |
1005 | struct snd_timer_system_private *priv; | |
1006 | unsigned long jiff; | |
1007 | ||
1008 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1009 | del_timer(&priv->tlist); | |
1010 | jiff = jiffies; | |
1011 | if (time_before(jiff, priv->last_expires)) | |
1012 | timer->sticks = priv->last_expires - jiff; | |
1013 | else | |
1014 | timer->sticks = 1; | |
1015 | return 0; | |
1016 | } | |
1017 | ||
53d2f744 | 1018 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1019 | { |
1020 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1021 | .resolution = 1000000000L / HZ, | |
1022 | .ticks = 10000000L, | |
1023 | .start = snd_timer_s_start, | |
1024 | .stop = snd_timer_s_stop | |
1025 | }; | |
1026 | ||
53d2f744 | 1027 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1028 | { |
1029 | kfree(timer->private_data); | |
1030 | } | |
1031 | ||
1032 | static int snd_timer_register_system(void) | |
1033 | { | |
53d2f744 | 1034 | struct snd_timer *timer; |
1da177e4 LT |
1035 | struct snd_timer_system_private *priv; |
1036 | int err; | |
1037 | ||
6b172a85 CL |
1038 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1039 | if (err < 0) | |
1da177e4 LT |
1040 | return err; |
1041 | strcpy(timer->name, "system timer"); | |
1042 | timer->hw = snd_timer_system; | |
ca2c0966 | 1043 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1044 | if (priv == NULL) { |
1045 | snd_timer_free(timer); | |
1046 | return -ENOMEM; | |
1047 | } | |
1048 | init_timer(&priv->tlist); | |
1049 | priv->tlist.function = snd_timer_s_function; | |
1050 | priv->tlist.data = (unsigned long) timer; | |
1051 | timer->private_data = priv; | |
1052 | timer->private_free = snd_timer_free_system; | |
1053 | return snd_timer_global_register(timer); | |
1054 | } | |
1055 | ||
e28563cc | 1056 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1057 | /* |
1058 | * Info interface | |
1059 | */ | |
1060 | ||
53d2f744 TI |
1061 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1062 | struct snd_info_buffer *buffer) | |
1da177e4 | 1063 | { |
53d2f744 TI |
1064 | struct snd_timer *timer; |
1065 | struct snd_timer_instance *ti; | |
1da177e4 LT |
1066 | struct list_head *p, *q; |
1067 | ||
1a60d4c5 | 1068 | mutex_lock(®ister_mutex); |
1da177e4 | 1069 | list_for_each(p, &snd_timer_list) { |
53d2f744 | 1070 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1071 | switch (timer->tmr_class) { |
1072 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1073 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1074 | break; | |
1075 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1076 | snd_iprintf(buffer, "C%i-%i: ", |
1077 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1078 | break; |
1079 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1080 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1081 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1082 | break; |
1083 | default: | |
6b172a85 CL |
1084 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1085 | timer->card ? timer->card->number : -1, | |
1086 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1087 | } |
1088 | snd_iprintf(buffer, "%s :", timer->name); | |
1089 | if (timer->hw.resolution) | |
6b172a85 CL |
1090 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1091 | timer->hw.resolution / 1000, | |
1092 | timer->hw.resolution % 1000, | |
1093 | timer->hw.ticks); | |
1da177e4 LT |
1094 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1095 | snd_iprintf(buffer, " SLAVE"); | |
1096 | snd_iprintf(buffer, "\n"); | |
1da177e4 | 1097 | list_for_each(q, &timer->open_list_head) { |
53d2f744 | 1098 | ti = list_entry(q, struct snd_timer_instance, open_list); |
6b172a85 CL |
1099 | snd_iprintf(buffer, " Client %s : %s\n", |
1100 | ti->owner ? ti->owner : "unknown", | |
1101 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1102 | SNDRV_TIMER_IFLG_RUNNING) | |
1103 | ? "running" : "stopped"); | |
1da177e4 | 1104 | } |
1da177e4 | 1105 | } |
1a60d4c5 | 1106 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1107 | } |
1108 | ||
6581f4e7 | 1109 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1110 | |
1111 | static void __init snd_timer_proc_init(void) | |
1112 | { | |
1113 | struct snd_info_entry *entry; | |
1114 | ||
1115 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1116 | if (entry != NULL) { | |
e28563cc TI |
1117 | entry->c.text.read = snd_timer_proc_read; |
1118 | if (snd_info_register(entry) < 0) { | |
1119 | snd_info_free_entry(entry); | |
1120 | entry = NULL; | |
1121 | } | |
1122 | } | |
1123 | snd_timer_proc_entry = entry; | |
1124 | } | |
1125 | ||
1126 | static void __exit snd_timer_proc_done(void) | |
1127 | { | |
1128 | snd_info_unregister(snd_timer_proc_entry); | |
1129 | } | |
1130 | #else /* !CONFIG_PROC_FS */ | |
1131 | #define snd_timer_proc_init() | |
1132 | #define snd_timer_proc_done() | |
1133 | #endif | |
1134 | ||
1da177e4 LT |
1135 | /* |
1136 | * USER SPACE interface | |
1137 | */ | |
1138 | ||
53d2f744 | 1139 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1140 | unsigned long resolution, |
1141 | unsigned long ticks) | |
1142 | { | |
53d2f744 TI |
1143 | struct snd_timer_user *tu = timeri->callback_data; |
1144 | struct snd_timer_read *r; | |
1da177e4 | 1145 | int prev; |
6b172a85 | 1146 | |
1da177e4 LT |
1147 | spin_lock(&tu->qlock); |
1148 | if (tu->qused > 0) { | |
1149 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1150 | r = &tu->queue[prev]; | |
1151 | if (r->resolution == resolution) { | |
1152 | r->ticks += ticks; | |
1153 | goto __wake; | |
1154 | } | |
1155 | } | |
1156 | if (tu->qused >= tu->queue_size) { | |
1157 | tu->overrun++; | |
1158 | } else { | |
1159 | r = &tu->queue[tu->qtail++]; | |
1160 | tu->qtail %= tu->queue_size; | |
1161 | r->resolution = resolution; | |
1162 | r->ticks = ticks; | |
1163 | tu->qused++; | |
1164 | } | |
1165 | __wake: | |
1166 | spin_unlock(&tu->qlock); | |
1167 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1168 | wake_up(&tu->qchange_sleep); | |
1169 | } | |
1170 | ||
53d2f744 TI |
1171 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1172 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1173 | { |
1174 | if (tu->qused >= tu->queue_size) { | |
1175 | tu->overrun++; | |
1176 | } else { | |
1177 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1178 | tu->qtail %= tu->queue_size; | |
1179 | tu->qused++; | |
1180 | } | |
1181 | } | |
1182 | ||
53d2f744 TI |
1183 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1184 | int event, | |
1da177e4 LT |
1185 | struct timespec *tstamp, |
1186 | unsigned long resolution) | |
1187 | { | |
53d2f744 TI |
1188 | struct snd_timer_user *tu = timeri->callback_data; |
1189 | struct snd_timer_tread r1; | |
1da177e4 | 1190 | |
6b172a85 CL |
1191 | if (event >= SNDRV_TIMER_EVENT_START && |
1192 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1193 | tu->tstamp = *tstamp; |
1194 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1195 | return; | |
1196 | r1.event = event; | |
1197 | r1.tstamp = *tstamp; | |
1198 | r1.val = resolution; | |
1199 | spin_lock(&tu->qlock); | |
1200 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1201 | spin_unlock(&tu->qlock); | |
1202 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1203 | wake_up(&tu->qchange_sleep); | |
1204 | } | |
1205 | ||
53d2f744 | 1206 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1207 | unsigned long resolution, |
1208 | unsigned long ticks) | |
1209 | { | |
53d2f744 TI |
1210 | struct snd_timer_user *tu = timeri->callback_data; |
1211 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1212 | struct timespec tstamp; |
1213 | int prev, append = 0; | |
1214 | ||
07799e75 | 1215 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1216 | spin_lock(&tu->qlock); |
6b172a85 CL |
1217 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1218 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1219 | spin_unlock(&tu->qlock); |
1220 | return; | |
1221 | } | |
1222 | if (tu->last_resolution != resolution || ticks > 0) | |
07799e75 | 1223 | getnstimeofday(&tstamp); |
6b172a85 CL |
1224 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1225 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1226 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1227 | r1.tstamp = tstamp; | |
1228 | r1.val = resolution; | |
1229 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1230 | tu->last_resolution = resolution; | |
1231 | append++; | |
1232 | } | |
1233 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1234 | goto __wake; | |
1235 | if (ticks == 0) | |
1236 | goto __wake; | |
1237 | if (tu->qused > 0) { | |
1238 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1239 | r = &tu->tqueue[prev]; | |
1240 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1241 | r->tstamp = tstamp; | |
1242 | r->val += ticks; | |
1243 | append++; | |
1244 | goto __wake; | |
1245 | } | |
1246 | } | |
1247 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1248 | r1.tstamp = tstamp; | |
1249 | r1.val = ticks; | |
1250 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1251 | append++; | |
1252 | __wake: | |
1253 | spin_unlock(&tu->qlock); | |
1254 | if (append == 0) | |
1255 | return; | |
1256 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1257 | wake_up(&tu->qchange_sleep); | |
1258 | } | |
1259 | ||
1260 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1261 | { | |
53d2f744 | 1262 | struct snd_timer_user *tu; |
6b172a85 | 1263 | |
ca2c0966 | 1264 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1265 | if (tu == NULL) |
1266 | return -ENOMEM; | |
1267 | spin_lock_init(&tu->qlock); | |
1268 | init_waitqueue_head(&tu->qchange_sleep); | |
1a60d4c5 | 1269 | mutex_init(&tu->tread_sem); |
1da177e4 LT |
1270 | tu->ticks = 1; |
1271 | tu->queue_size = 128; | |
53d2f744 | 1272 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1273 | GFP_KERNEL); |
1da177e4 LT |
1274 | if (tu->queue == NULL) { |
1275 | kfree(tu); | |
1276 | return -ENOMEM; | |
1277 | } | |
1278 | file->private_data = tu; | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1283 | { | |
53d2f744 | 1284 | struct snd_timer_user *tu; |
1da177e4 LT |
1285 | |
1286 | if (file->private_data) { | |
1287 | tu = file->private_data; | |
1288 | file->private_data = NULL; | |
1289 | fasync_helper(-1, file, 0, &tu->fasync); | |
1290 | if (tu->timeri) | |
1291 | snd_timer_close(tu->timeri); | |
1292 | kfree(tu->queue); | |
1293 | kfree(tu->tqueue); | |
1294 | kfree(tu); | |
1295 | } | |
1296 | return 0; | |
1297 | } | |
1298 | ||
53d2f744 | 1299 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1300 | { |
1301 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1302 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1303 | id->card = -1; | |
1304 | id->device = -1; | |
1305 | id->subdevice = -1; | |
1306 | } | |
1307 | ||
53d2f744 | 1308 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1309 | { |
1310 | id->dev_class = timer->tmr_class; | |
1311 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1312 | id->card = timer->card ? timer->card->number : -1; | |
1313 | id->device = timer->tmr_device; | |
1314 | id->subdevice = timer->tmr_subdevice; | |
1315 | } | |
1316 | ||
53d2f744 | 1317 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1318 | { |
53d2f744 TI |
1319 | struct snd_timer_id id; |
1320 | struct snd_timer *timer; | |
1da177e4 | 1321 | struct list_head *p; |
6b172a85 | 1322 | |
1da177e4 LT |
1323 | if (copy_from_user(&id, _tid, sizeof(id))) |
1324 | return -EFAULT; | |
1a60d4c5 | 1325 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1326 | if (id.dev_class < 0) { /* first item */ |
1327 | if (list_empty(&snd_timer_list)) | |
1328 | snd_timer_user_zero_id(&id); | |
1329 | else { | |
9dfba380 | 1330 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1331 | struct snd_timer, device_list); |
1da177e4 LT |
1332 | snd_timer_user_copy_id(&id, timer); |
1333 | } | |
1334 | } else { | |
1335 | switch (id.dev_class) { | |
1336 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1337 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1338 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1339 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1340 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1341 | snd_timer_user_copy_id(&id, timer); | |
1342 | break; | |
1343 | } | |
1344 | if (timer->tmr_device >= id.device) { | |
1345 | snd_timer_user_copy_id(&id, timer); | |
1346 | break; | |
1347 | } | |
1348 | } | |
1349 | if (p == &snd_timer_list) | |
1350 | snd_timer_user_zero_id(&id); | |
1351 | break; | |
1352 | case SNDRV_TIMER_CLASS_CARD: | |
1353 | case SNDRV_TIMER_CLASS_PCM: | |
1354 | if (id.card < 0) { | |
1355 | id.card = 0; | |
1356 | } else { | |
1357 | if (id.card < 0) { | |
1358 | id.card = 0; | |
1359 | } else { | |
1360 | if (id.device < 0) { | |
1361 | id.device = 0; | |
1362 | } else { | |
6b172a85 CL |
1363 | if (id.subdevice < 0) { |
1364 | id.subdevice = 0; | |
1365 | } else { | |
1366 | id.subdevice++; | |
1367 | } | |
1da177e4 LT |
1368 | } |
1369 | } | |
1370 | } | |
1371 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1372 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1373 | if (timer->tmr_class > id.dev_class) { |
1374 | snd_timer_user_copy_id(&id, timer); | |
1375 | break; | |
1376 | } | |
1377 | if (timer->tmr_class < id.dev_class) | |
1378 | continue; | |
1379 | if (timer->card->number > id.card) { | |
1380 | snd_timer_user_copy_id(&id, timer); | |
1381 | break; | |
1382 | } | |
1383 | if (timer->card->number < id.card) | |
1384 | continue; | |
1385 | if (timer->tmr_device > id.device) { | |
1386 | snd_timer_user_copy_id(&id, timer); | |
1387 | break; | |
1388 | } | |
1389 | if (timer->tmr_device < id.device) | |
1390 | continue; | |
1391 | if (timer->tmr_subdevice > id.subdevice) { | |
1392 | snd_timer_user_copy_id(&id, timer); | |
1393 | break; | |
1394 | } | |
1395 | if (timer->tmr_subdevice < id.subdevice) | |
1396 | continue; | |
1397 | snd_timer_user_copy_id(&id, timer); | |
1398 | break; | |
1399 | } | |
1400 | if (p == &snd_timer_list) | |
1401 | snd_timer_user_zero_id(&id); | |
1402 | break; | |
1403 | default: | |
1404 | snd_timer_user_zero_id(&id); | |
1405 | } | |
1406 | } | |
1a60d4c5 | 1407 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1408 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1409 | return -EFAULT; | |
1410 | return 0; | |
6b172a85 | 1411 | } |
1da177e4 | 1412 | |
6b172a85 | 1413 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1414 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1415 | { |
53d2f744 TI |
1416 | struct snd_timer_ginfo *ginfo; |
1417 | struct snd_timer_id tid; | |
1418 | struct snd_timer *t; | |
1da177e4 LT |
1419 | struct list_head *p; |
1420 | int err = 0; | |
1421 | ||
1422 | ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL); | |
1423 | if (! ginfo) | |
1424 | return -ENOMEM; | |
1425 | if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) { | |
1426 | kfree(ginfo); | |
1427 | return -EFAULT; | |
1428 | } | |
1429 | tid = ginfo->tid; | |
1430 | memset(ginfo, 0, sizeof(*ginfo)); | |
1431 | ginfo->tid = tid; | |
1a60d4c5 | 1432 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1433 | t = snd_timer_find(&tid); |
1434 | if (t != NULL) { | |
1435 | ginfo->card = t->card ? t->card->number : -1; | |
1436 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1437 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1438 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1439 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1440 | ginfo->resolution = t->hw.resolution; | |
1441 | if (t->hw.resolution_min > 0) { | |
1442 | ginfo->resolution_min = t->hw.resolution_min; | |
1443 | ginfo->resolution_max = t->hw.resolution_max; | |
1444 | } | |
1445 | list_for_each(p, &t->open_list_head) { | |
1446 | ginfo->clients++; | |
1447 | } | |
1448 | } else { | |
1449 | err = -ENODEV; | |
1450 | } | |
1a60d4c5 | 1451 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1452 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1453 | err = -EFAULT; | |
1454 | kfree(ginfo); | |
1455 | return err; | |
1456 | } | |
1457 | ||
6b172a85 | 1458 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1459 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1460 | { |
53d2f744 TI |
1461 | struct snd_timer_gparams gparams; |
1462 | struct snd_timer *t; | |
1da177e4 LT |
1463 | int err; |
1464 | ||
1465 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1466 | return -EFAULT; | |
1a60d4c5 | 1467 | mutex_lock(®ister_mutex); |
1da177e4 | 1468 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1469 | if (!t) { |
1da177e4 | 1470 | err = -ENODEV; |
6b172a85 CL |
1471 | goto _error; |
1472 | } | |
1473 | if (!list_empty(&t->open_list_head)) { | |
1474 | err = -EBUSY; | |
1475 | goto _error; | |
1476 | } | |
1477 | if (!t->hw.set_period) { | |
1478 | err = -ENOSYS; | |
1479 | goto _error; | |
1da177e4 | 1480 | } |
6b172a85 CL |
1481 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1482 | _error: | |
1a60d4c5 | 1483 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1484 | return err; |
1485 | } | |
1486 | ||
6b172a85 | 1487 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1488 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1489 | { |
53d2f744 TI |
1490 | struct snd_timer_gstatus gstatus; |
1491 | struct snd_timer_id tid; | |
1492 | struct snd_timer *t; | |
1da177e4 LT |
1493 | int err = 0; |
1494 | ||
1495 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1496 | return -EFAULT; | |
1497 | tid = gstatus.tid; | |
1498 | memset(&gstatus, 0, sizeof(gstatus)); | |
1499 | gstatus.tid = tid; | |
1a60d4c5 | 1500 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1501 | t = snd_timer_find(&tid); |
1502 | if (t != NULL) { | |
1503 | if (t->hw.c_resolution) | |
1504 | gstatus.resolution = t->hw.c_resolution(t); | |
1505 | else | |
1506 | gstatus.resolution = t->hw.resolution; | |
1507 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1508 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1509 | &gstatus.resolution_den); | |
1da177e4 LT |
1510 | } else { |
1511 | gstatus.resolution_num = gstatus.resolution; | |
1512 | gstatus.resolution_den = 1000000000uL; | |
1513 | } | |
1514 | } else { | |
1515 | err = -ENODEV; | |
1516 | } | |
1a60d4c5 | 1517 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1518 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1519 | err = -EFAULT; | |
1520 | return err; | |
1521 | } | |
1522 | ||
6b172a85 | 1523 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1524 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1525 | { |
53d2f744 TI |
1526 | struct snd_timer_user *tu; |
1527 | struct snd_timer_select tselect; | |
1da177e4 | 1528 | char str[32]; |
c1935b4d | 1529 | int err = 0; |
6b172a85 | 1530 | |
1da177e4 | 1531 | tu = file->private_data; |
1a60d4c5 | 1532 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1533 | if (tu->timeri) { |
1da177e4 | 1534 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1535 | tu->timeri = NULL; |
1536 | } | |
1537 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1538 | err = -EFAULT; | |
1539 | goto __err; | |
1540 | } | |
1da177e4 LT |
1541 | sprintf(str, "application %i", current->pid); |
1542 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1543 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1544 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1545 | if (err < 0) | |
c1935b4d | 1546 | goto __err; |
1da177e4 | 1547 | |
4d572776 JJ |
1548 | kfree(tu->queue); |
1549 | tu->queue = NULL; | |
1550 | kfree(tu->tqueue); | |
1551 | tu->tqueue = NULL; | |
1da177e4 | 1552 | if (tu->tread) { |
53d2f744 | 1553 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1554 | GFP_KERNEL); |
c1935b4d JK |
1555 | if (tu->tqueue == NULL) |
1556 | err = -ENOMEM; | |
1da177e4 | 1557 | } else { |
53d2f744 | 1558 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1559 | GFP_KERNEL); |
c1935b4d JK |
1560 | if (tu->queue == NULL) |
1561 | err = -ENOMEM; | |
1da177e4 | 1562 | } |
6b172a85 | 1563 | |
c1935b4d JK |
1564 | if (err < 0) { |
1565 | snd_timer_close(tu->timeri); | |
1566 | tu->timeri = NULL; | |
1567 | } else { | |
1568 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1569 | tu->timeri->callback = tu->tread |
1570 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1571 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1572 | tu->timeri->callback_data = (void *)tu; | |
1573 | } | |
1574 | ||
1575 | __err: | |
1a60d4c5 | 1576 | mutex_unlock(&tu->tread_sem); |
c1935b4d | 1577 | return err; |
1da177e4 LT |
1578 | } |
1579 | ||
6b172a85 | 1580 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1581 | struct snd_timer_info __user *_info) |
1da177e4 | 1582 | { |
53d2f744 TI |
1583 | struct snd_timer_user *tu; |
1584 | struct snd_timer_info *info; | |
1585 | struct snd_timer *t; | |
1da177e4 LT |
1586 | int err = 0; |
1587 | ||
1588 | tu = file->private_data; | |
1589 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1590 | t = tu->timeri->timer; | |
1591 | snd_assert(t != NULL, return -ENXIO); | |
1592 | ||
ca2c0966 | 1593 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1594 | if (! info) |
1595 | return -ENOMEM; | |
1596 | info->card = t->card ? t->card->number : -1; | |
1597 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1598 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1599 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1600 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1601 | info->resolution = t->hw.resolution; | |
1602 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1603 | err = -EFAULT; | |
1604 | kfree(info); | |
1605 | return err; | |
1606 | } | |
1607 | ||
6b172a85 | 1608 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1609 | struct snd_timer_params __user *_params) |
1da177e4 | 1610 | { |
53d2f744 TI |
1611 | struct snd_timer_user *tu; |
1612 | struct snd_timer_params params; | |
1613 | struct snd_timer *t; | |
1614 | struct snd_timer_read *tr; | |
1615 | struct snd_timer_tread *ttr; | |
1da177e4 | 1616 | int err; |
6b172a85 | 1617 | |
1da177e4 LT |
1618 | tu = file->private_data; |
1619 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1620 | t = tu->timeri->timer; | |
1621 | snd_assert(t != NULL, return -ENXIO); | |
1622 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
1623 | return -EFAULT; | |
1624 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1625 | err = -EINVAL; | |
1626 | goto _end; | |
1627 | } | |
6b172a85 CL |
1628 | if (params.queue_size > 0 && |
1629 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1630 | err = -EINVAL; |
1631 | goto _end; | |
1632 | } | |
1633 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1634 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1635 | (1<<SNDRV_TIMER_EVENT_START)| | |
1636 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1637 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1638 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1639 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1640 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1641 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1642 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1643 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1644 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1645 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1646 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1647 | err = -EINVAL; |
1648 | goto _end; | |
1649 | } | |
1650 | snd_timer_stop(tu->timeri); | |
1651 | spin_lock_irq(&t->lock); | |
1652 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1653 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1654 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1655 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1656 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1657 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1658 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1659 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1660 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1661 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1662 | if (params.queue_size > 0 && |
1663 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1664 | if (tu->tread) { |
6b172a85 CL |
1665 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1666 | GFP_KERNEL); | |
1da177e4 LT |
1667 | if (ttr) { |
1668 | kfree(tu->tqueue); | |
1669 | tu->queue_size = params.queue_size; | |
1670 | tu->tqueue = ttr; | |
1671 | } | |
1672 | } else { | |
6b172a85 CL |
1673 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1674 | GFP_KERNEL); | |
1da177e4 LT |
1675 | if (tr) { |
1676 | kfree(tu->queue); | |
1677 | tu->queue_size = params.queue_size; | |
1678 | tu->queue = tr; | |
1679 | } | |
1680 | } | |
1681 | } | |
1682 | tu->qhead = tu->qtail = tu->qused = 0; | |
1683 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1684 | if (tu->tread) { | |
53d2f744 | 1685 | struct snd_timer_tread tread; |
1da177e4 LT |
1686 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1687 | tread.tstamp.tv_sec = 0; | |
1688 | tread.tstamp.tv_nsec = 0; | |
1689 | tread.val = 0; | |
1690 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1691 | } else { | |
53d2f744 | 1692 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1693 | r->resolution = 0; |
1694 | r->ticks = 0; | |
1695 | tu->qused++; | |
1696 | tu->qtail++; | |
1697 | } | |
1da177e4 LT |
1698 | } |
1699 | tu->filter = params.filter; | |
1700 | tu->ticks = params.ticks; | |
1701 | err = 0; | |
1702 | _end: | |
1703 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1704 | return -EFAULT; | |
1705 | return err; | |
1706 | } | |
1707 | ||
6b172a85 | 1708 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1709 | struct snd_timer_status __user *_status) |
1da177e4 | 1710 | { |
53d2f744 TI |
1711 | struct snd_timer_user *tu; |
1712 | struct snd_timer_status status; | |
6b172a85 | 1713 | |
1da177e4 LT |
1714 | tu = file->private_data; |
1715 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1716 | memset(&status, 0, sizeof(status)); | |
1717 | status.tstamp = tu->tstamp; | |
1718 | status.resolution = snd_timer_resolution(tu->timeri); | |
1719 | status.lost = tu->timeri->lost; | |
1720 | status.overrun = tu->overrun; | |
1721 | spin_lock_irq(&tu->qlock); | |
1722 | status.queue = tu->qused; | |
1723 | spin_unlock_irq(&tu->qlock); | |
1724 | if (copy_to_user(_status, &status, sizeof(status))) | |
1725 | return -EFAULT; | |
1726 | return 0; | |
1727 | } | |
1728 | ||
1729 | static int snd_timer_user_start(struct file *file) | |
1730 | { | |
1731 | int err; | |
53d2f744 | 1732 | struct snd_timer_user *tu; |
6b172a85 | 1733 | |
1da177e4 LT |
1734 | tu = file->private_data; |
1735 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1736 | snd_timer_stop(tu->timeri); | |
1737 | tu->timeri->lost = 0; | |
1738 | tu->last_resolution = 0; | |
1739 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1740 | } | |
1741 | ||
1742 | static int snd_timer_user_stop(struct file *file) | |
1743 | { | |
1744 | int err; | |
53d2f744 | 1745 | struct snd_timer_user *tu; |
6b172a85 | 1746 | |
1da177e4 LT |
1747 | tu = file->private_data; |
1748 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1749 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; | |
1750 | } | |
1751 | ||
1752 | static int snd_timer_user_continue(struct file *file) | |
1753 | { | |
1754 | int err; | |
53d2f744 | 1755 | struct snd_timer_user *tu; |
6b172a85 | 1756 | |
1da177e4 LT |
1757 | tu = file->private_data; |
1758 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
1759 | tu->timeri->lost = 0; | |
1760 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1761 | } | |
1762 | ||
15790a6b TI |
1763 | static int snd_timer_user_pause(struct file *file) |
1764 | { | |
1765 | int err; | |
53d2f744 | 1766 | struct snd_timer_user *tu; |
6b172a85 | 1767 | |
15790a6b TI |
1768 | tu = file->private_data; |
1769 | snd_assert(tu->timeri != NULL, return -ENXIO); | |
d138b445 | 1770 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1771 | } |
1772 | ||
8c50b37c TI |
1773 | enum { |
1774 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1775 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1776 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1777 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1778 | }; | |
1779 | ||
6b172a85 CL |
1780 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1781 | unsigned long arg) | |
1da177e4 | 1782 | { |
53d2f744 | 1783 | struct snd_timer_user *tu; |
1da177e4 LT |
1784 | void __user *argp = (void __user *)arg; |
1785 | int __user *p = argp; | |
6b172a85 | 1786 | |
1da177e4 LT |
1787 | tu = file->private_data; |
1788 | switch (cmd) { | |
1789 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1790 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1791 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1792 | return snd_timer_user_next_device(argp); | |
1793 | case SNDRV_TIMER_IOCTL_TREAD: | |
1794 | { | |
1795 | int xarg; | |
6b172a85 | 1796 | |
1a60d4c5 | 1797 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1798 | if (tu->timeri) { /* too late */ |
1a60d4c5 | 1799 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1800 | return -EBUSY; |
c1935b4d JK |
1801 | } |
1802 | if (get_user(xarg, p)) { | |
1a60d4c5 | 1803 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1804 | return -EFAULT; |
c1935b4d | 1805 | } |
1da177e4 | 1806 | tu->tread = xarg ? 1 : 0; |
1a60d4c5 | 1807 | mutex_unlock(&tu->tread_sem); |
1da177e4 LT |
1808 | return 0; |
1809 | } | |
1810 | case SNDRV_TIMER_IOCTL_GINFO: | |
1811 | return snd_timer_user_ginfo(file, argp); | |
1812 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1813 | return snd_timer_user_gparams(file, argp); | |
1814 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1815 | return snd_timer_user_gstatus(file, argp); | |
1816 | case SNDRV_TIMER_IOCTL_SELECT: | |
1817 | return snd_timer_user_tselect(file, argp); | |
1818 | case SNDRV_TIMER_IOCTL_INFO: | |
1819 | return snd_timer_user_info(file, argp); | |
1820 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1821 | return snd_timer_user_params(file, argp); | |
1822 | case SNDRV_TIMER_IOCTL_STATUS: | |
1823 | return snd_timer_user_status(file, argp); | |
1824 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1825 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1826 | return snd_timer_user_start(file); |
1827 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1828 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1829 | return snd_timer_user_stop(file); |
1830 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1831 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1832 | return snd_timer_user_continue(file); |
15790a6b | 1833 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1834 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1835 | return snd_timer_user_pause(file); |
1da177e4 LT |
1836 | } |
1837 | return -ENOTTY; | |
1838 | } | |
1839 | ||
1840 | static int snd_timer_user_fasync(int fd, struct file * file, int on) | |
1841 | { | |
53d2f744 | 1842 | struct snd_timer_user *tu; |
1da177e4 | 1843 | int err; |
6b172a85 | 1844 | |
1da177e4 LT |
1845 | tu = file->private_data; |
1846 | err = fasync_helper(fd, file, on, &tu->fasync); | |
1847 | if (err < 0) | |
1848 | return err; | |
1849 | return 0; | |
1850 | } | |
1851 | ||
6b172a85 CL |
1852 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1853 | size_t count, loff_t *offset) | |
1da177e4 | 1854 | { |
53d2f744 | 1855 | struct snd_timer_user *tu; |
1da177e4 LT |
1856 | long result = 0, unit; |
1857 | int err = 0; | |
6b172a85 | 1858 | |
1da177e4 | 1859 | tu = file->private_data; |
53d2f744 | 1860 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1861 | spin_lock_irq(&tu->qlock); |
1862 | while ((long)count - result >= unit) { | |
1863 | while (!tu->qused) { | |
1864 | wait_queue_t wait; | |
1865 | ||
1866 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1867 | err = -EAGAIN; | |
1868 | break; | |
1869 | } | |
1870 | ||
1871 | set_current_state(TASK_INTERRUPTIBLE); | |
1872 | init_waitqueue_entry(&wait, current); | |
1873 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1874 | ||
1875 | spin_unlock_irq(&tu->qlock); | |
1876 | schedule(); | |
1877 | spin_lock_irq(&tu->qlock); | |
1878 | ||
1879 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1880 | ||
1881 | if (signal_pending(current)) { | |
1882 | err = -ERESTARTSYS; | |
1883 | break; | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | spin_unlock_irq(&tu->qlock); | |
1888 | if (err < 0) | |
1889 | goto _error; | |
1890 | ||
1891 | if (tu->tread) { | |
6b172a85 | 1892 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1893 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1894 | err = -EFAULT; |
1895 | goto _error; | |
1896 | } | |
1897 | } else { | |
6b172a85 | 1898 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1899 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1900 | err = -EFAULT; |
1901 | goto _error; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | tu->qhead %= tu->queue_size; | |
1906 | ||
1907 | result += unit; | |
1908 | buffer += unit; | |
1909 | ||
1910 | spin_lock_irq(&tu->qlock); | |
1911 | tu->qused--; | |
1912 | } | |
1913 | spin_unlock_irq(&tu->qlock); | |
1914 | _error: | |
1915 | return result > 0 ? result : err; | |
1916 | } | |
1917 | ||
1918 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1919 | { | |
1920 | unsigned int mask; | |
53d2f744 | 1921 | struct snd_timer_user *tu; |
1da177e4 LT |
1922 | |
1923 | tu = file->private_data; | |
1924 | ||
1925 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1926 | |
1da177e4 LT |
1927 | mask = 0; |
1928 | if (tu->qused) | |
1929 | mask |= POLLIN | POLLRDNORM; | |
1930 | ||
1931 | return mask; | |
1932 | } | |
1933 | ||
1934 | #ifdef CONFIG_COMPAT | |
1935 | #include "timer_compat.c" | |
1936 | #else | |
1937 | #define snd_timer_user_ioctl_compat NULL | |
1938 | #endif | |
1939 | ||
1940 | static struct file_operations snd_timer_f_ops = | |
1941 | { | |
1942 | .owner = THIS_MODULE, | |
1943 | .read = snd_timer_user_read, | |
1944 | .open = snd_timer_user_open, | |
1945 | .release = snd_timer_user_release, | |
1946 | .poll = snd_timer_user_poll, | |
1947 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1948 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1949 | .fasync = snd_timer_user_fasync, | |
1950 | }; | |
1951 | ||
1da177e4 LT |
1952 | /* |
1953 | * ENTRY functions | |
1954 | */ | |
1955 | ||
1da177e4 LT |
1956 | static int __init alsa_timer_init(void) |
1957 | { | |
1958 | int err; | |
1da177e4 LT |
1959 | |
1960 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS | |
6b172a85 CL |
1961 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1962 | "system timer"); | |
1da177e4 | 1963 | #endif |
e28563cc | 1964 | |
1da177e4 | 1965 | if ((err = snd_timer_register_system()) < 0) |
6b172a85 CL |
1966 | snd_printk(KERN_ERR "unable to register system timer (%i)\n", |
1967 | err); | |
f87135f5 CL |
1968 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1969 | &snd_timer_f_ops, NULL, "timer")) < 0) | |
6b172a85 CL |
1970 | snd_printk(KERN_ERR "unable to register timer device (%i)\n", |
1971 | err); | |
e28563cc | 1972 | snd_timer_proc_init(); |
1da177e4 LT |
1973 | return 0; |
1974 | } | |
1975 | ||
1976 | static void __exit alsa_timer_exit(void) | |
1977 | { | |
1978 | struct list_head *p, *n; | |
1979 | ||
1980 | snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); | |
1981 | /* unregister the system timer */ | |
1982 | list_for_each_safe(p, n, &snd_timer_list) { | |
53d2f744 | 1983 | struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1984 | snd_timer_unregister(timer); |
1985 | } | |
e28563cc | 1986 | snd_timer_proc_done(); |
1da177e4 LT |
1987 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
1988 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
1989 | #endif | |
1990 | } | |
1991 | ||
1992 | module_init(alsa_timer_init) | |
1993 | module_exit(alsa_timer_exit) | |
1994 | ||
1995 | EXPORT_SYMBOL(snd_timer_open); | |
1996 | EXPORT_SYMBOL(snd_timer_close); | |
1997 | EXPORT_SYMBOL(snd_timer_resolution); | |
1998 | EXPORT_SYMBOL(snd_timer_start); | |
1999 | EXPORT_SYMBOL(snd_timer_stop); | |
2000 | EXPORT_SYMBOL(snd_timer_continue); | |
2001 | EXPORT_SYMBOL(snd_timer_pause); | |
2002 | EXPORT_SYMBOL(snd_timer_new); | |
2003 | EXPORT_SYMBOL(snd_timer_notify); | |
2004 | EXPORT_SYMBOL(snd_timer_global_new); | |
2005 | EXPORT_SYMBOL(snd_timer_global_free); | |
2006 | EXPORT_SYMBOL(snd_timer_global_register); | |
2007 | EXPORT_SYMBOL(snd_timer_global_unregister); | |
2008 | EXPORT_SYMBOL(snd_timer_interrupt); |