projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[ALSA] dynamic minors (3/6): store device-specific object pointers dynamically
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / timer.c
CommitLineData
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>
28#include <linux/moduleparam.h>
543537bd 29#include <linux/string.h>
1da177e4
LT		 30#include <sound/core.h>
31#include <sound/timer.h>
32#include <sound/control.h>
33#include <sound/info.h>
34#include <sound/minors.h>
35#include <sound/initval.h>
36#include <linux/kmod.h>
37#ifdef CONFIG_KERNELD
38#include <linux/kerneld.h>
39#endif
40
41#if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE)
42#define DEFAULT_TIMER_LIMIT 3
43#elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE)
44#define DEFAULT_TIMER_LIMIT 2
45#else
46#define DEFAULT_TIMER_LIMIT 1
47#endif
48
49static int timer_limit = DEFAULT_TIMER_LIMIT;
50MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Takashi Iwai <tiwai@suse.de>");
51MODULE_DESCRIPTION("ALSA timer interface");
52MODULE_LICENSE("GPL");
53module_param(timer_limit, int, 0444);
54MODULE_PARM_DESC(timer_limit, "Maximum global timers in system.");
55
53d2f744
TI		 56struct snd_timer_user {
57 struct snd_timer_instance *timeri;
6b172a85 58 int tread; /* enhanced read with timestamps and events */
1da177e4
LT		 59 unsigned long ticks;
60 unsigned long overrun;
61 int qhead;
62 int qtail;
63 int qused;
64 int queue_size;
53d2f744
TI		 65 struct snd_timer_read *queue;
66 struct snd_timer_tread *tqueue;
1da177e4
LT		 67 spinlock_t qlock;
68 unsigned long last_resolution;
69 unsigned int filter;
70 struct timespec tstamp; /* trigger tstamp */
71 wait_queue_head_t qchange_sleep;
72 struct fasync_struct *fasync;
c1935b4d 73 struct semaphore tread_sem;
53d2f744 74};
1da177e4
LT		 75
76/* list of timers */
77static LIST_HEAD(snd_timer_list);
78
79/* list of slave instances */
80static LIST_HEAD(snd_timer_slave_list);
81
82/* lock for slave active lists */
83static DEFINE_SPINLOCK(slave_active_lock);
84
85static DECLARE_MUTEX(register_mutex);
86
53d2f744
TI		 87static int snd_timer_free(struct snd_timer *timer);
88static int snd_timer_dev_free(struct snd_device *device);
89static int snd_timer_dev_register(struct snd_device *device);
90static int snd_timer_dev_unregister(struct snd_device *device);
1da177e4 91
53d2f744 92static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left);
1da177e4
LT		 93
94/*
95 * create a timer instance with the given owner string.
96 * when timer is not NULL, increments the module counter
97 */
53d2f744
TI		 98static struct snd_timer_instance *snd_timer_instance_new(char *owner,
99 struct snd_timer *timer)
1da177e4 100{
53d2f744 101 struct snd_timer_instance *timeri;
ca2c0966 102 timeri = kzalloc(sizeof(*timeri), GFP_KERNEL);
1da177e4
LT		 103 if (timeri == NULL)
104 return NULL;
543537bd 105 timeri->owner = kstrdup(owner, GFP_KERNEL);
1da177e4
LT		 106 if (! timeri->owner) {
107 kfree(timeri);
108 return NULL;
109 }
110 INIT_LIST_HEAD(&timeri->open_list);
111 INIT_LIST_HEAD(&timeri->active_list);
112 INIT_LIST_HEAD(&timeri->ack_list);
113 INIT_LIST_HEAD(&timeri->slave_list_head);
114 INIT_LIST_HEAD(&timeri->slave_active_head);
115
116 timeri->timer = timer;
de24214d 117 if (timer && !try_module_get(timer->module)) {
1da177e4
LT		 118 kfree(timeri->owner);
119 kfree(timeri);
120 return NULL;
121 }
122
123 return timeri;
124}
125
126/*
127 * find a timer instance from the given timer id
128 */
53d2f744 129static struct snd_timer *snd_timer_find(struct snd_timer_id *tid)
1da177e4 130{
53d2f744 131 struct snd_timer *timer = NULL;
1da177e4
LT		 132 struct list_head *p;
133
134 list_for_each(p, &snd_timer_list) {
53d2f744 135 timer = list_entry(p, struct snd_timer, device_list);
1da177e4
LT		 136
137 if (timer->tmr_class != tid->dev_class)
138 continue;
139 if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD ||
140 timer->tmr_class == SNDRV_TIMER_CLASS_PCM) &&
141 (timer->card == NULL ||
142 timer->card->number != tid->card))
143 continue;
144 if (timer->tmr_device != tid->device)
145 continue;
146 if (timer->tmr_subdevice != tid->subdevice)
147 continue;
148 return timer;
149 }
150 return NULL;
151}
152
153#ifdef CONFIG_KMOD
154
53d2f744 155static void snd_timer_request(struct snd_timer_id *tid)
1da177e4
LT		 156{
157 if (! current->fs->root)
158 return;
159 switch (tid->dev_class) {
160 case SNDRV_TIMER_CLASS_GLOBAL:
161 if (tid->device < timer_limit)
162 request_module("snd-timer-%i", tid->device);
163 break;
164 case SNDRV_TIMER_CLASS_CARD:
165 case SNDRV_TIMER_CLASS_PCM:
166 if (tid->card < snd_ecards_limit)
167 request_module("snd-card-%i", tid->card);
168 break;
169 default:
170 break;
171 }
172}
173
174#endif
175
176/*
177 * look for a master instance matching with the slave id of the given slave.
178 * when found, relink the open_link of the slave.
179 *
180 * call this with register_mutex down.
181 */
53d2f744 182static void snd_timer_check_slave(struct snd_timer_instance *slave)
1da177e4 183{
53d2f744
TI		 184 struct snd_timer *timer;
185 struct snd_timer_instance *master;
1da177e4
LT		 186 struct list_head *p, *q;
187
188 /* FIXME: it's really dumb to look up all entries.. */
189 list_for_each(p, &snd_timer_list) {
53d2f744 190 timer = list_entry(p, struct snd_timer, device_list);
1da177e4 191 list_for_each(q, &timer->open_list_head) {
53d2f744 192 master = list_entry(q, struct snd_timer_instance, open_list);
1da177e4
LT		 193 if (slave->slave_class == master->slave_class &&
194 slave->slave_id == master->slave_id) {
195 list_del(&slave->open_list);
6b172a85
CL		 196 list_add_tail(&slave->open_list,
197 &master->slave_list_head);
1da177e4
LT		 198 spin_lock_irq(&slave_active_lock);
199 slave->master = master;
200 slave->timer = master->timer;
201 spin_unlock_irq(&slave_active_lock);
202 return;
203 }
204 }
205 }
206}
207
208/*
209 * look for slave instances matching with the slave id of the given master.
210 * when found, relink the open_link of slaves.
211 *
212 * call this with register_mutex down.
213 */
53d2f744 214static void snd_timer_check_master(struct snd_timer_instance *master)
1da177e4 215{
53d2f744 216 struct snd_timer_instance *slave;
1da177e4
LT		 217 struct list_head *p, *n;
218
219 /* check all pending slaves */
220 list_for_each_safe(p, n, &snd_timer_slave_list) {
53d2f744 221 slave = list_entry(p, struct snd_timer_instance, open_list);
1da177e4
LT		 222 if (slave->slave_class == master->slave_class &&
223 slave->slave_id == master->slave_id) {
224 list_del(p);
225 list_add_tail(p, &master->slave_list_head);
226 spin_lock_irq(&slave_active_lock);
227 slave->master = master;
228 slave->timer = master->timer;
229 if (slave->flags & SNDRV_TIMER_IFLG_RUNNING)
6b172a85
CL		 230 list_add_tail(&slave->active_list,
231 &master->slave_active_head);
1da177e4
LT		 232 spin_unlock_irq(&slave_active_lock);
233 }
234 }
235}
236
237/*
238 * open a timer instance
239 * when opening a master, the slave id must be here given.
240 */
53d2f744
TI		 241int snd_timer_open(struct snd_timer_instance **ti,
242 char *owner, struct snd_timer_id *tid,
1da177e4
LT		 243 unsigned int slave_id)
244{
53d2f744
TI		 245 struct snd_timer *timer;
246 struct snd_timer_instance *timeri = NULL;
6b172a85 247
1da177e4
LT		 248 if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) {
249 /* open a slave instance */
250 if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE ||
251 tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) {
252 snd_printd("invalid slave class %i\n", tid->dev_sclass);
253 return -EINVAL;
254 }
255 down(&register_mutex);
256 timeri = snd_timer_instance_new(owner, NULL);
2fd43d11
CL		 257 if (!timeri) {
258 up(&register_mutex);
259 return -ENOMEM;
260 }
1da177e4
LT		 261 timeri->slave_class = tid->dev_sclass;
262 timeri->slave_id = tid->device;
263 timeri->flags |= SNDRV_TIMER_IFLG_SLAVE;
264 list_add_tail(&timeri->open_list, &snd_timer_slave_list);
265 snd_timer_check_slave(timeri);
266 up(&register_mutex);
267 *ti = timeri;
268 return 0;
269 }
270
271 /* open a master instance */
272 down(&register_mutex);
273 timer = snd_timer_find(tid);
274#ifdef CONFIG_KMOD
275 if (timer == NULL) {
276 up(&register_mutex);
277 snd_timer_request(tid);
278 down(&register_mutex);
279 timer = snd_timer_find(tid);
280 }
281#endif
2fd43d11 282 if (!timer) {
1da177e4
LT		 283 up(&register_mutex);
284 return -ENODEV;
285 }
2fd43d11
CL		 286 if (!list_empty(&timer->open_list_head)) {
287 timeri = list_entry(timer->open_list_head.next,
53d2f744 288 struct snd_timer_instance, open_list);
2fd43d11
CL		 289 if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) {
290 up(&register_mutex);
291 return -EBUSY;
292 }
293 }
294 timeri = snd_timer_instance_new(owner, timer);
295 if (!timeri) {
296 up(&register_mutex);
297 return -ENOMEM;
298 }
299 timeri->slave_class = tid->dev_sclass;
300 timeri->slave_id = slave_id;
301 if (list_empty(&timer->open_list_head) && timer->hw.open)
302 timer->hw.open(timer);
303 list_add_tail(&timeri->open_list, &timer->open_list_head);
304 snd_timer_check_master(timeri);
1da177e4
LT		 305 up(&register_mutex);
306 *ti = timeri;
307 return 0;
308}
309
53d2f744
TI		 310static int _snd_timer_stop(struct snd_timer_instance *timeri,
311 int keep_flag, int event);
1da177e4
LT		 312
313/*
314 * close a timer instance
315 */
53d2f744 316int snd_timer_close(struct snd_timer_instance *timeri)
1da177e4 317{
53d2f744 318 struct snd_timer *timer = NULL;
1da177e4 319 struct list_head *p, *n;
53d2f744 320 struct snd_timer_instance *slave;
1da177e4
LT		 321
322 snd_assert(timeri != NULL, return -ENXIO);
323
324 /* force to stop the timer */
325 snd_timer_stop(timeri);
326
327 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
328 /* wait, until the active callback is finished */
329 spin_lock_irq(&slave_active_lock);
330 while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) {
331 spin_unlock_irq(&slave_active_lock);
332 udelay(10);
333 spin_lock_irq(&slave_active_lock);
334 }
335 spin_unlock_irq(&slave_active_lock);
336 down(&register_mutex);
337 list_del(&timeri->open_list);
338 up(&register_mutex);
339 } else {
340 timer = timeri->timer;
341 /* wait, until the active callback is finished */
342 spin_lock_irq(&timer->lock);
343 while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) {
344 spin_unlock_irq(&timer->lock);
345 udelay(10);
346 spin_lock_irq(&timer->lock);
347 }
348 spin_unlock_irq(&timer->lock);
349 down(&register_mutex);
350 list_del(&timeri->open_list);
6b172a85
CL		 351 if (timer && list_empty(&timer->open_list_head) &&
352 timer->hw.close)
1da177e4
LT		 353 timer->hw.close(timer);
354 /* remove slave links */
355 list_for_each_safe(p, n, &timeri->slave_list_head) {
53d2f744 356 slave = list_entry(p, struct snd_timer_instance, open_list);
1da177e4
LT		 357 spin_lock_irq(&slave_active_lock);
358 _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION);
359 list_del(p);
360 list_add_tail(p, &snd_timer_slave_list);
361 slave->master = NULL;
362 slave->timer = NULL;
363 spin_unlock_irq(&slave_active_lock);
364 }
365 up(&register_mutex);
366 }
367 if (timeri->private_free)
368 timeri->private_free(timeri);
369 kfree(timeri->owner);
370 kfree(timeri);
de24214d
CL		 371 if (timer)
372 module_put(timer->module);
1da177e4
LT		 373 return 0;
374}
375
53d2f744 376unsigned long snd_timer_resolution(struct snd_timer_instance *timeri)
1da177e4 377{
53d2f744 378 struct snd_timer * timer;
1da177e4
LT		 379
380 if (timeri == NULL)
381 return 0;
382 if ((timer = timeri->timer) != NULL) {
383 if (timer->hw.c_resolution)
384 return timer->hw.c_resolution(timer);
385 return timer->hw.resolution;
386 }
387 return 0;
388}
389
53d2f744 390static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
1da177e4 391{
53d2f744 392 struct snd_timer *timer;
1da177e4
LT		 393 unsigned long flags;
394 unsigned long resolution = 0;
53d2f744 395 struct snd_timer_instance *ts;
1da177e4
LT		 396 struct list_head *n;
397 struct timespec tstamp;
398
07799e75 399 getnstimeofday(&tstamp);
6b172a85
CL		 400 snd_assert(event >= SNDRV_TIMER_EVENT_START &&
401 event <= SNDRV_TIMER_EVENT_PAUSE, return);
402 if (event == SNDRV_TIMER_EVENT_START ||
403 event == SNDRV_TIMER_EVENT_CONTINUE)
1da177e4
LT		 404 resolution = snd_timer_resolution(ti);
405 if (ti->ccallback)
406 ti->ccallback(ti, SNDRV_TIMER_EVENT_START, &tstamp, resolution);
407 if (ti->flags & SNDRV_TIMER_IFLG_SLAVE)
408 return;
409 timer = ti->timer;
410 if (timer == NULL)
411 return;
412 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
413 return;
414 spin_lock_irqsave(&timer->lock, flags);
415 list_for_each(n, &ti->slave_active_head) {
53d2f744 416 ts = list_entry(n, struct snd_timer_instance, active_list);
1da177e4
LT		 417 if (ts->ccallback)
418 ts->ccallback(ti, event + 100, &tstamp, resolution);
419 }
420 spin_unlock_irqrestore(&timer->lock, flags);
421}
422
53d2f744 423static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri,
6b172a85 424 unsigned long sticks)
1da177e4
LT		 425{
426 list_del(&timeri->active_list);
427 list_add_tail(&timeri->active_list, &timer->active_list_head);
428 if (timer->running) {
429 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
430 goto __start_now;
431 timer->flags |= SNDRV_TIMER_FLG_RESCHED;
432 timeri->flags |= SNDRV_TIMER_IFLG_START;
433 return 1; /* delayed start */
434 } else {
435 timer->sticks = sticks;
436 timer->hw.start(timer);
437 __start_now:
438 timer->running++;
439 timeri->flags |= SNDRV_TIMER_IFLG_RUNNING;
440 return 0;
441 }
442}
443
53d2f744 444static int snd_timer_start_slave(struct snd_timer_instance *timeri)
1da177e4
LT		 445{
446 unsigned long flags;
447
448 spin_lock_irqsave(&slave_active_lock, flags);
449 timeri->flags |= SNDRV_TIMER_IFLG_RUNNING;
450 if (timeri->master)
6b172a85
CL		 451 list_add_tail(&timeri->active_list,
452 &timeri->master->slave_active_head);
1da177e4
LT		 453 spin_unlock_irqrestore(&slave_active_lock, flags);
454 return 1; /* delayed start */
455}
456
457/*
458 * start the timer instance
6b172a85 459 */
53d2f744 460int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks)
1da177e4 461{
53d2f744 462 struct snd_timer *timer;
1da177e4
LT		 463 int result = -EINVAL;
464 unsigned long flags;
465
466 if (timeri == NULL || ticks < 1)
467 return -EINVAL;
468 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
469 result = snd_timer_start_slave(timeri);
470 snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
471 return result;
472 }
473 timer = timeri->timer;
474 if (timer == NULL)
475 return -EINVAL;
476 spin_lock_irqsave(&timer->lock, flags);
477 timeri->ticks = timeri->cticks = ticks;
478 timeri->pticks = 0;
479 result = snd_timer_start1(timer, timeri, ticks);
480 spin_unlock_irqrestore(&timer->lock, flags);
481 snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
482 return result;
483}
484
53d2f744
TI		 485static int _snd_timer_stop(struct snd_timer_instance * timeri,
486 int keep_flag, int event)
1da177e4 487{
53d2f744 488 struct snd_timer *timer;
1da177e4
LT		 489 unsigned long flags;
490
491 snd_assert(timeri != NULL, return -ENXIO);
492
493 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
494 if (!keep_flag) {
495 spin_lock_irqsave(&slave_active_lock, flags);
496 timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
497 spin_unlock_irqrestore(&slave_active_lock, flags);
498 }
499 goto __end;
500 }
501 timer = timeri->timer;
502 if (!timer)
503 return -EINVAL;
504 spin_lock_irqsave(&timer->lock, flags);
505 list_del_init(&timeri->ack_list);
506 list_del_init(&timeri->active_list);
507 if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) &&
508 !(--timer->running)) {
509 timer->hw.stop(timer);
510 if (timer->flags & SNDRV_TIMER_FLG_RESCHED) {
511 timer->flags &= ~SNDRV_TIMER_FLG_RESCHED;
512 snd_timer_reschedule(timer, 0);
513 if (timer->flags & SNDRV_TIMER_FLG_CHANGE) {
514 timer->flags &= ~SNDRV_TIMER_FLG_CHANGE;
515 timer->hw.start(timer);
516 }
517 }
518 }
519 if (!keep_flag)
6b172a85
CL		 520 timeri->flags &=
521 ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START);
1da177e4
LT		 522 spin_unlock_irqrestore(&timer->lock, flags);
523 __end:
524 if (event != SNDRV_TIMER_EVENT_RESOLUTION)
525 snd_timer_notify1(timeri, event);
526 return 0;
527}
528
529/*
530 * stop the timer instance.
531 *
532 * do not call this from the timer callback!
533 */
53d2f744 534int snd_timer_stop(struct snd_timer_instance *timeri)
1da177e4 535{
53d2f744 536 struct snd_timer *timer;
1da177e4
LT		 537 unsigned long flags;
538 int err;
539
540 err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP);
541 if (err < 0)
542 return err;
543 timer = timeri->timer;
544 spin_lock_irqsave(&timer->lock, flags);
545 timeri->cticks = timeri->ticks;
546 timeri->pticks = 0;
547 spin_unlock_irqrestore(&timer->lock, flags);
548 return 0;
549}
550
551/*
552 * start again.. the tick is kept.
553 */
53d2f744 554int snd_timer_continue(struct snd_timer_instance *timeri)
1da177e4 555{
53d2f744 556 struct snd_timer *timer;
1da177e4
LT		 557 int result = -EINVAL;
558 unsigned long flags;
559
560 if (timeri == NULL)
561 return result;
562 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
563 return snd_timer_start_slave(timeri);
564 timer = timeri->timer;
565 if (! timer)
566 return -EINVAL;
567 spin_lock_irqsave(&timer->lock, flags);
568 if (!timeri->cticks)
569 timeri->cticks = 1;
570 timeri->pticks = 0;
571 result = snd_timer_start1(timer, timeri, timer->sticks);
572 spin_unlock_irqrestore(&timer->lock, flags);
573 snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE);
574 return result;
575}
576
577/*
578 * pause.. remember the ticks left
579 */
53d2f744 580int snd_timer_pause(struct snd_timer_instance * timeri)
1da177e4
LT		 581{
582 return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE);
583}
584
585/*
586 * reschedule the timer
587 *
588 * start pending instances and check the scheduling ticks.
589 * when the scheduling ticks is changed set CHANGE flag to reprogram the timer.
590 */
53d2f744 591static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left)
1da177e4 592{
53d2f744 593 struct snd_timer_instance *ti;
1da177e4
LT		 594 unsigned long ticks = ~0UL;
595 struct list_head *p;
596
597 list_for_each(p, &timer->active_list_head) {
53d2f744 598 ti = list_entry(p, struct snd_timer_instance, active_list);
1da177e4
LT		 599 if (ti->flags & SNDRV_TIMER_IFLG_START) {
600 ti->flags &= ~SNDRV_TIMER_IFLG_START;
601 ti->flags |= SNDRV_TIMER_IFLG_RUNNING;
602 timer->running++;
603 }
604 if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) {
605 if (ticks > ti->cticks)
606 ticks = ti->cticks;
607 }
608 }
609 if (ticks == ~0UL) {
610 timer->flags &= ~SNDRV_TIMER_FLG_RESCHED;
611 return;
612 }
613 if (ticks > timer->hw.ticks)
614 ticks = timer->hw.ticks;
615 if (ticks_left != ticks)
616 timer->flags |= SNDRV_TIMER_FLG_CHANGE;
617 timer->sticks = ticks;
618}
619
620/*
621 * timer tasklet
622 *
623 */
624static void snd_timer_tasklet(unsigned long arg)
625{
53d2f744
TI		 626 struct snd_timer *timer = (struct snd_timer *) arg;
627 struct snd_timer_instance *ti;
1da177e4
LT		 628 struct list_head *p;
629 unsigned long resolution, ticks;
630
631 spin_lock(&timer->lock);
632 /* now process all callbacks */
633 while (!list_empty(&timer->sack_list_head)) {
634 p = timer->sack_list_head.next; /* get first item */
53d2f744 635 ti = list_entry(p, struct snd_timer_instance, ack_list);
1da177e4
LT		 636
637 /* remove from ack_list and make empty */
638 list_del_init(p);
6b172a85 639
1da177e4
LT		 640 ticks = ti->pticks;
641 ti->pticks = 0;
642 resolution = ti->resolution;
643
644 ti->flags |= SNDRV_TIMER_IFLG_CALLBACK;
645 spin_unlock(&timer->lock);
646 if (ti->callback)
647 ti->callback(ti, resolution, ticks);
648 spin_lock(&timer->lock);
649 ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK;
650 }
651 spin_unlock(&timer->lock);
652}
653
654/*
655 * timer interrupt
656 *
657 * ticks_left is usually equal to timer->sticks.
658 *
659 */
53d2f744 660void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
1da177e4 661{
53d2f744 662 struct snd_timer_instance *ti, *ts;
1da177e4 663 unsigned long resolution, ticks;
6b172a85 664 struct list_head *p, *q, *n, *ack_list_head;
b32425ac 665 unsigned long flags;
1da177e4
LT		 666 int use_tasklet = 0;
667
668 if (timer == NULL)
669 return;
670
b32425ac 671 spin_lock_irqsave(&timer->lock, flags);
1da177e4
LT		 672
673 /* remember the current resolution */
674 if (timer->hw.c_resolution)
675 resolution = timer->hw.c_resolution(timer);
676 else
677 resolution = timer->hw.resolution;
678
679 /* loop for all active instances
6b172a85
CL		 680 * Here we cannot use list_for_each because the active_list of a
681 * processed instance is relinked to done_list_head before the callback
682 * is called.
1da177e4
LT		 683 */
684 list_for_each_safe(p, n, &timer->active_list_head) {
53d2f744 685 ti = list_entry(p, struct snd_timer_instance, active_list);
1da177e4
LT		 686 if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING))
687 continue;
688 ti->pticks += ticks_left;
689 ti->resolution = resolution;
690 if (ti->cticks < ticks_left)
691 ti->cticks = 0;
692 else
693 ti->cticks -= ticks_left;
694 if (ti->cticks) /* not expired */
695 continue;
696 if (ti->flags & SNDRV_TIMER_IFLG_AUTO) {
697 ti->cticks = ti->ticks;
698 } else {
699 ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
700 if (--timer->running)
701 list_del(p);
702 }
6b172a85
CL		 703 if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||
704 (ti->flags & SNDRV_TIMER_IFLG_FAST))
705 ack_list_head = &timer->ack_list_head;
706 else
707 ack_list_head = &timer->sack_list_head;
708 if (list_empty(&ti->ack_list))
709 list_add_tail(&ti->ack_list, ack_list_head);
1da177e4 710 list_for_each(q, &ti->slave_active_head) {
53d2f744 711 ts = list_entry(q, struct snd_timer_instance, active_list);
1da177e4
LT		 712 ts->pticks = ti->pticks;
713 ts->resolution = resolution;
6b172a85
CL		 714 if (list_empty(&ts->ack_list))
715 list_add_tail(&ts->ack_list, ack_list_head);
1da177e4
LT		 716 }
717 }
718 if (timer->flags & SNDRV_TIMER_FLG_RESCHED)
719 snd_timer_reschedule(timer, ticks_left);
720 if (timer->running) {
721 if (timer->hw.flags & SNDRV_TIMER_HW_STOP) {
722 timer->hw.stop(timer);
723 timer->flags |= SNDRV_TIMER_FLG_CHANGE;
724 }
725 if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) ||
726 (timer->flags & SNDRV_TIMER_FLG_CHANGE)) {
727 /* restart timer */
728 timer->flags &= ~SNDRV_TIMER_FLG_CHANGE;
729 timer->hw.start(timer);
730 }
731 } else {
732 timer->hw.stop(timer);
733 }
734
735 /* now process all fast callbacks */
736 while (!list_empty(&timer->ack_list_head)) {
737 p = timer->ack_list_head.next; /* get first item */
53d2f744 738 ti = list_entry(p, struct snd_timer_instance, ack_list);
6b172a85 739
1da177e4
LT		 740 /* remove from ack_list and make empty */
741 list_del_init(p);
6b172a85 742
1da177e4
LT		 743 ticks = ti->pticks;
744 ti->pticks = 0;
745
746 ti->flags |= SNDRV_TIMER_IFLG_CALLBACK;
747 spin_unlock(&timer->lock);
748 if (ti->callback)
749 ti->callback(ti, resolution, ticks);
750 spin_lock(&timer->lock);
751 ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK;
752 }
753
754 /* do we have any slow callbacks? */
755 use_tasklet = !list_empty(&timer->sack_list_head);
b32425ac 756 spin_unlock_irqrestore(&timer->lock, flags);
1da177e4
LT		 757
758 if (use_tasklet)
759 tasklet_hi_schedule(&timer->task_queue);
760}
761
762/*
763
764 */
765
53d2f744
TI		 766int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
767 struct snd_timer **rtimer)
1da177e4 768{
53d2f744 769 struct snd_timer *timer;
1da177e4 770 int err;
53d2f744 771 static struct snd_device_ops ops = {
1da177e4
LT		 772 .dev_free = snd_timer_dev_free,
773 .dev_register = snd_timer_dev_register,
774 .dev_unregister = snd_timer_dev_unregister
775 };
776
777 snd_assert(tid != NULL, return -EINVAL);
778 snd_assert(rtimer != NULL, return -EINVAL);
779 *rtimer = NULL;
ca2c0966 780 timer = kzalloc(sizeof(*timer), GFP_KERNEL);
73e77ba0
TI		 781 if (timer == NULL) {
782 snd_printk(KERN_ERR "timer: cannot allocate\n");
1da177e4 783 return -ENOMEM;
73e77ba0 784 }
1da177e4
LT		 785 timer->tmr_class = tid->dev_class;
786 timer->card = card;
787 timer->tmr_device = tid->device;
788 timer->tmr_subdevice = tid->subdevice;
789 if (id)
790 strlcpy(timer->id, id, sizeof(timer->id));
791 INIT_LIST_HEAD(&timer->device_list);
792 INIT_LIST_HEAD(&timer->open_list_head);
793 INIT_LIST_HEAD(&timer->active_list_head);
794 INIT_LIST_HEAD(&timer->ack_list_head);
795 INIT_LIST_HEAD(&timer->sack_list_head);
796 spin_lock_init(&timer->lock);
6b172a85
CL		 797 tasklet_init(&timer->task_queue, snd_timer_tasklet,
798 (unsigned long)timer);
1da177e4 799 if (card != NULL) {
de24214d 800 timer->module = card->module;
6b172a85
CL		 801 err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops);
802 if (err < 0) {
1da177e4
LT		 803 snd_timer_free(timer);
804 return err;
805 }
806 }
807 *rtimer = timer;
808 return 0;
809}
810
53d2f744 811static int snd_timer_free(struct snd_timer *timer)
1da177e4
LT		 812{
813 snd_assert(timer != NULL, return -ENXIO);
814 if (timer->private_free)
815 timer->private_free(timer);
816 kfree(timer);
817 return 0;
818}
819
53d2f744 820static int snd_timer_dev_free(struct snd_device *device)
1da177e4 821{
53d2f744 822 struct snd_timer *timer = device->device_data;
1da177e4
LT		 823 return snd_timer_free(timer);
824}
825
53d2f744 826static int snd_timer_dev_register(struct snd_device *dev)
1da177e4 827{
53d2f744
TI		 828 struct snd_timer *timer = dev->device_data;
829 struct snd_timer *timer1;
1da177e4
LT		 830 struct list_head *p;
831
6b172a85
CL		 832 snd_assert(timer != NULL && timer->hw.start != NULL &&
833 timer->hw.stop != NULL, return -ENXIO);
1da177e4
LT		 834 if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) &&
835 !timer->hw.resolution && timer->hw.c_resolution == NULL)
836 return -EINVAL;
837
838 down(&register_mutex);
839 list_for_each(p, &snd_timer_list) {
53d2f744 840 timer1 = list_entry(p, struct snd_timer, device_list);
1da177e4
LT		 841 if (timer1->tmr_class > timer->tmr_class)
842 break;
843 if (timer1->tmr_class < timer->tmr_class)
844 continue;
845 if (timer1->card && timer->card) {
846 if (timer1->card->number > timer->card->number)
847 break;
848 if (timer1->card->number < timer->card->number)
849 continue;
850 }
851 if (timer1->tmr_device > timer->tmr_device)
852 break;
853 if (timer1->tmr_device < timer->tmr_device)
854 continue;
855 if (timer1->tmr_subdevice > timer->tmr_subdevice)
856 break;
857 if (timer1->tmr_subdevice < timer->tmr_subdevice)
858 continue;
859 /* conflicts.. */
860 up(&register_mutex);
861 return -EBUSY;
862 }
863 list_add_tail(&timer->device_list, p);
864 up(&register_mutex);
865 return 0;
866}
867
53d2f744 868static int snd_timer_unregister(struct snd_timer *timer)
1da177e4
LT		 869{
870 struct list_head *p, *n;
53d2f744 871 struct snd_timer_instance *ti;
1da177e4
LT		 872
873 snd_assert(timer != NULL, return -ENXIO);
874 down(&register_mutex);
875 if (! list_empty(&timer->open_list_head)) {
876 snd_printk(KERN_WARNING "timer 0x%lx is busy?\n", (long)timer);
877 list_for_each_safe(p, n, &timer->open_list_head) {
878 list_del_init(p);
53d2f744 879 ti = list_entry(p, struct snd_timer_instance, open_list);
1da177e4
LT		 880 ti->timer = NULL;
881 }
882 }
883 list_del(&timer->device_list);
884 up(&register_mutex);
885 return snd_timer_free(timer);
886}
887
53d2f744 888static int snd_timer_dev_unregister(struct snd_device *device)
1da177e4 889{
53d2f744 890 struct snd_timer *timer = device->device_data;
1da177e4
LT		 891 return snd_timer_unregister(timer);
892}
893
53d2f744 894void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp)
1da177e4
LT		 895{
896 unsigned long flags;
897 unsigned long resolution = 0;
53d2f744 898 struct snd_timer_instance *ti, *ts;
1da177e4
LT		 899 struct list_head *p, *n;
900
7c22f1aa
TI		 901 if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))
902 return;
6b172a85
CL		 903 snd_assert(event >= SNDRV_TIMER_EVENT_MSTART &&
904 event <= SNDRV_TIMER_EVENT_MRESUME, return);
1da177e4 905 spin_lock_irqsave(&timer->lock, flags);
a501dfa3
JK		 906 if (event == SNDRV_TIMER_EVENT_MSTART ||
907 event == SNDRV_TIMER_EVENT_MCONTINUE ||
908 event == SNDRV_TIMER_EVENT_MRESUME) {
1da177e4
LT		 909 if (timer->hw.c_resolution)
910 resolution = timer->hw.c_resolution(timer);
911 else
912 resolution = timer->hw.resolution;
913 }
914 list_for_each(p, &timer->active_list_head) {
53d2f744 915 ti = list_entry(p, struct snd_timer_instance, active_list);
1da177e4
LT		 916 if (ti->ccallback)
917 ti->ccallback(ti, event, tstamp, resolution);
918 list_for_each(n, &ti->slave_active_head) {
53d2f744 919 ts = list_entry(n, struct snd_timer_instance, active_list);
1da177e4
LT		 920 if (ts->ccallback)
921 ts->ccallback(ts, event, tstamp, resolution);
922 }
923 }
924 spin_unlock_irqrestore(&timer->lock, flags);
925}
926
927/*
928 * exported functions for global timers
929 */
53d2f744 930int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer)
1da177e4 931{
53d2f744 932 struct snd_timer_id tid;
6b172a85 933
1da177e4
LT		 934 tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL;
935 tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
936 tid.card = -1;
937 tid.device = device;
938 tid.subdevice = 0;
939 return snd_timer_new(NULL, id, &tid, rtimer);
940}
941
53d2f744 942int snd_timer_global_free(struct snd_timer *timer)
1da177e4
LT		 943{
944 return snd_timer_free(timer);
945}
946
53d2f744 947int snd_timer_global_register(struct snd_timer *timer)
1da177e4 948{
53d2f744 949 struct snd_device dev;
1da177e4
LT		 950
951 memset(&dev, 0, sizeof(dev));
952 dev.device_data = timer;
953 return snd_timer_dev_register(&dev);
954}
955
53d2f744 956int snd_timer_global_unregister(struct snd_timer *timer)
1da177e4
LT		 957{
958 return snd_timer_unregister(timer);
959}
960
6b172a85 961/*
1da177e4
LT		 962 * System timer
963 */
964
965struct snd_timer_system_private {
966 struct timer_list tlist;
967 struct timer * timer;
968 unsigned long last_expires;
969 unsigned long last_jiffies;
970 unsigned long correction;
971};
972
1da177e4
LT		 973static void snd_timer_s_function(unsigned long data)
974{
53d2f744 975 struct snd_timer *timer = (struct snd_timer *)data;
1da177e4
LT		 976 struct snd_timer_system_private *priv = timer->private_data;
977 unsigned long jiff = jiffies;
978 if (time_after(jiff, priv->last_expires))
979 priv->correction = (long)jiff - (long)priv->last_expires;
980 snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies);
981}
982
53d2f744 983static int snd_timer_s_start(struct snd_timer * timer)
1da177e4
LT		 984{
985 struct snd_timer_system_private *priv;
986 unsigned long njiff;
987
988 priv = (struct snd_timer_system_private *) timer->private_data;
989 njiff = (priv->last_jiffies = jiffies);
990 if (priv->correction > timer->sticks - 1) {
991 priv->correction -= timer->sticks - 1;
992 njiff++;
993 } else {
994 njiff += timer->sticks - priv->correction;
995 priv->correction -= timer->sticks;
996 }
997 priv->last_expires = priv->tlist.expires = njiff;
998 add_timer(&priv->tlist);
999 return 0;
1000}
1001
53d2f744 1002static int snd_timer_s_stop(struct snd_timer * timer)
1da177e4
LT		 1003{
1004 struct snd_timer_system_private *priv;
1005 unsigned long jiff;
1006
1007 priv = (struct snd_timer_system_private *) timer->private_data;
1008 del_timer(&priv->tlist);
1009 jiff = jiffies;
1010 if (time_before(jiff, priv->last_expires))
1011 timer->sticks = priv->last_expires - jiff;
1012 else
1013 timer->sticks = 1;
1014 return 0;
1015}
1016
53d2f744 1017static struct snd_timer_hardware snd_timer_system =
1da177e4
LT		 1018{
1019 .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET,
1020 .resolution = 1000000000L / HZ,
1021 .ticks = 10000000L,
1022 .start = snd_timer_s_start,
1023 .stop = snd_timer_s_stop
1024};
1025
53d2f744 1026static void snd_timer_free_system(struct snd_timer *timer)
1da177e4
LT		 1027{
1028 kfree(timer->private_data);
1029}
1030
1031static int snd_timer_register_system(void)
1032{
53d2f744 1033 struct snd_timer *timer;
1da177e4
LT		 1034 struct snd_timer_system_private *priv;
1035 int err;
1036
6b172a85
CL		 1037 err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer);
1038 if (err < 0)
1da177e4
LT		 1039 return err;
1040 strcpy(timer->name, "system timer");
1041 timer->hw = snd_timer_system;
ca2c0966 1042 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1da177e4
LT		 1043 if (priv == NULL) {
1044 snd_timer_free(timer);
1045 return -ENOMEM;
1046 }
1047 init_timer(&priv->tlist);
1048 priv->tlist.function = snd_timer_s_function;
1049 priv->tlist.data = (unsigned long) timer;
1050 timer->private_data = priv;
1051 timer->private_free = snd_timer_free_system;
1052 return snd_timer_global_register(timer);
1053}
1054
1055/*
1056 * Info interface
1057 */
1058
53d2f744
TI		 1059static void snd_timer_proc_read(struct snd_info_entry *entry,
1060 struct snd_info_buffer *buffer)
1da177e4
LT		 1061{
1062 unsigned long flags;
53d2f744
TI		 1063 struct snd_timer *timer;
1064 struct snd_timer_instance *ti;
1da177e4
LT		 1065 struct list_head *p, *q;
1066
1067 down(&register_mutex);
1068 list_for_each(p, &snd_timer_list) {
53d2f744 1069 timer = list_entry(p, struct snd_timer, device_list);
1da177e4
LT		 1070 switch (timer->tmr_class) {
1071 case SNDRV_TIMER_CLASS_GLOBAL:
1072 snd_iprintf(buffer, "G%i: ", timer->tmr_device);
1073 break;
1074 case SNDRV_TIMER_CLASS_CARD:
6b172a85
CL		 1075 snd_iprintf(buffer, "C%i-%i: ",
1076 timer->card->number, timer->tmr_device);
1da177e4
LT		 1077 break;
1078 case SNDRV_TIMER_CLASS_PCM:
6b172a85
CL		 1079 snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number,
1080 timer->tmr_device, timer->tmr_subdevice);
1da177e4
LT		 1081 break;
1082 default:
6b172a85
CL		 1083 snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class,
1084 timer->card ? timer->card->number : -1,
1085 timer->tmr_device, timer->tmr_subdevice);
1da177e4
LT		 1086 }
1087 snd_iprintf(buffer, "%s :", timer->name);
1088 if (timer->hw.resolution)
6b172a85
CL		 1089 snd_iprintf(buffer, " %lu.%03luus (%lu ticks)",
1090 timer->hw.resolution / 1000,
1091 timer->hw.resolution % 1000,
1092 timer->hw.ticks);
1da177e4
LT		 1093 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
1094 snd_iprintf(buffer, " SLAVE");
1095 snd_iprintf(buffer, "\n");
1096 spin_lock_irqsave(&timer->lock, flags);
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
LT		 1104 }
1105 spin_unlock_irqrestore(&timer->lock, flags);
1106 }
1107 up(&register_mutex);
1108}
1109
1110/*
1111 * USER SPACE interface
1112 */
1113
53d2f744 1114static void snd_timer_user_interrupt(struct snd_timer_instance *timeri,
1da177e4
LT		 1115 unsigned long resolution,
1116 unsigned long ticks)
1117{
53d2f744
TI		 1118 struct snd_timer_user *tu = timeri->callback_data;
1119 struct snd_timer_read *r;
1da177e4 1120 int prev;
6b172a85 1121
1da177e4
LT		 1122 spin_lock(&tu->qlock);
1123 if (tu->qused > 0) {
1124 prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1;
1125 r = &tu->queue[prev];
1126 if (r->resolution == resolution) {
1127 r->ticks += ticks;
1128 goto __wake;
1129 }
1130 }
1131 if (tu->qused >= tu->queue_size) {
1132 tu->overrun++;
1133 } else {
1134 r = &tu->queue[tu->qtail++];
1135 tu->qtail %= tu->queue_size;
1136 r->resolution = resolution;
1137 r->ticks = ticks;
1138 tu->qused++;
1139 }
1140 __wake:
1141 spin_unlock(&tu->qlock);
1142 kill_fasync(&tu->fasync, SIGIO, POLL_IN);
1143 wake_up(&tu->qchange_sleep);
1144}
1145
53d2f744
TI		 1146static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu,
1147 struct snd_timer_tread *tread)
1da177e4
LT		 1148{
1149 if (tu->qused >= tu->queue_size) {
1150 tu->overrun++;
1151 } else {
1152 memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread));
1153 tu->qtail %= tu->queue_size;
1154 tu->qused++;
1155 }
1156}
1157
53d2f744
TI		 1158static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
1159 int event,
1da177e4
LT		 1160 struct timespec *tstamp,
1161 unsigned long resolution)
1162{
53d2f744
TI		 1163 struct snd_timer_user *tu = timeri->callback_data;
1164 struct snd_timer_tread r1;
1da177e4 1165
6b172a85
CL		 1166 if (event >= SNDRV_TIMER_EVENT_START &&
1167 event <= SNDRV_TIMER_EVENT_PAUSE)
1da177e4
LT		 1168 tu->tstamp = *tstamp;
1169 if ((tu->filter & (1 << event)) == 0 || !tu->tread)
1170 return;
1171 r1.event = event;
1172 r1.tstamp = *tstamp;
1173 r1.val = resolution;
1174 spin_lock(&tu->qlock);
1175 snd_timer_user_append_to_tqueue(tu, &r1);
1176 spin_unlock(&tu->qlock);
1177 kill_fasync(&tu->fasync, SIGIO, POLL_IN);
1178 wake_up(&tu->qchange_sleep);
1179}
1180
53d2f744 1181static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
1da177e4
LT		 1182 unsigned long resolution,
1183 unsigned long ticks)
1184{
53d2f744
TI		 1185 struct snd_timer_user *tu = timeri->callback_data;
1186 struct snd_timer_tread *r, r1;
1da177e4
LT		 1187 struct timespec tstamp;
1188 int prev, append = 0;
1189
07799e75 1190 memset(&tstamp, 0, sizeof(tstamp));
1da177e4 1191 spin_lock(&tu->qlock);
6b172a85
CL		 1192 if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) |
1193 (1 << SNDRV_TIMER_EVENT_TICK))) == 0) {
1da177e4
LT		 1194 spin_unlock(&tu->qlock);
1195 return;
1196 }
1197 if (tu->last_resolution != resolution || ticks > 0)
07799e75 1198 getnstimeofday(&tstamp);
6b172a85
CL		 1199 if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
1200 tu->last_resolution != resolution) {
1da177e4
LT		 1201 r1.event = SNDRV_TIMER_EVENT_RESOLUTION;
1202 r1.tstamp = tstamp;
1203 r1.val = resolution;
1204 snd_timer_user_append_to_tqueue(tu, &r1);
1205 tu->last_resolution = resolution;
1206 append++;
1207 }
1208 if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0)
1209 goto __wake;
1210 if (ticks == 0)
1211 goto __wake;
1212 if (tu->qused > 0) {
1213 prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1;
1214 r = &tu->tqueue[prev];
1215 if (r->event == SNDRV_TIMER_EVENT_TICK) {
1216 r->tstamp = tstamp;
1217 r->val += ticks;
1218 append++;
1219 goto __wake;
1220 }
1221 }
1222 r1.event = SNDRV_TIMER_EVENT_TICK;
1223 r1.tstamp = tstamp;
1224 r1.val = ticks;
1225 snd_timer_user_append_to_tqueue(tu, &r1);
1226 append++;
1227 __wake:
1228 spin_unlock(&tu->qlock);
1229 if (append == 0)
1230 return;
1231 kill_fasync(&tu->fasync, SIGIO, POLL_IN);
1232 wake_up(&tu->qchange_sleep);
1233}
1234
1235static int snd_timer_user_open(struct inode *inode, struct file *file)
1236{
53d2f744 1237 struct snd_timer_user *tu;
6b172a85 1238
ca2c0966 1239 tu = kzalloc(sizeof(*tu), GFP_KERNEL);
1da177e4
LT		 1240 if (tu == NULL)
1241 return -ENOMEM;
1242 spin_lock_init(&tu->qlock);
1243 init_waitqueue_head(&tu->qchange_sleep);
c1935b4d 1244 init_MUTEX(&tu->tread_sem);
1da177e4
LT		 1245 tu->ticks = 1;
1246 tu->queue_size = 128;
53d2f744 1247 tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
6b172a85 1248 GFP_KERNEL);
1da177e4
LT		 1249 if (tu->queue == NULL) {
1250 kfree(tu);
1251 return -ENOMEM;
1252 }
1253 file->private_data = tu;
1254 return 0;
1255}
1256
1257static int snd_timer_user_release(struct inode *inode, struct file *file)
1258{
53d2f744 1259 struct snd_timer_user *tu;
1da177e4
LT		 1260
1261 if (file->private_data) {
1262 tu = file->private_data;
1263 file->private_data = NULL;
1264 fasync_helper(-1, file, 0, &tu->fasync);
1265 if (tu->timeri)
1266 snd_timer_close(tu->timeri);
1267 kfree(tu->queue);
1268 kfree(tu->tqueue);
1269 kfree(tu);
1270 }
1271 return 0;
1272}
1273
53d2f744 1274static void snd_timer_user_zero_id(struct snd_timer_id *id)
1da177e4
LT		 1275{
1276 id->dev_class = SNDRV_TIMER_CLASS_NONE;
1277 id->dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1278 id->card = -1;
1279 id->device = -1;
1280 id->subdevice = -1;
1281}
1282
53d2f744 1283static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer)
1da177e4
LT		 1284{
1285 id->dev_class = timer->tmr_class;
1286 id->dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1287 id->card = timer->card ? timer->card->number : -1;
1288 id->device = timer->tmr_device;
1289 id->subdevice = timer->tmr_subdevice;
1290}
1291
53d2f744 1292static int snd_timer_user_next_device(struct snd_timer_id __user *_tid)
1da177e4 1293{
53d2f744
TI		 1294 struct snd_timer_id id;
1295 struct snd_timer *timer;
1da177e4 1296 struct list_head *p;
6b172a85 1297
1da177e4
LT		 1298 if (copy_from_user(&id, _tid, sizeof(id)))
1299 return -EFAULT;
1300 down(&register_mutex);
1301 if (id.dev_class < 0) { /* first item */
1302 if (list_empty(&snd_timer_list))
1303 snd_timer_user_zero_id(&id);
1304 else {
9dfba380 1305 timer = list_entry(snd_timer_list.next,
53d2f744 1306 struct snd_timer, device_list);
1da177e4
LT		 1307 snd_timer_user_copy_id(&id, timer);
1308 }
1309 } else {
1310 switch (id.dev_class) {
1311 case SNDRV_TIMER_CLASS_GLOBAL:
1312 id.device = id.device < 0 ? 0 : id.device + 1;
1313 list_for_each(p, &snd_timer_list) {
53d2f744 1314 timer = list_entry(p, struct snd_timer, device_list);
1da177e4
LT		 1315 if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) {
1316 snd_timer_user_copy_id(&id, timer);
1317 break;
1318 }
1319 if (timer->tmr_device >= id.device) {
1320 snd_timer_user_copy_id(&id, timer);
1321 break;
1322 }
1323 }
1324 if (p == &snd_timer_list)
1325 snd_timer_user_zero_id(&id);
1326 break;
1327 case SNDRV_TIMER_CLASS_CARD:
1328 case SNDRV_TIMER_CLASS_PCM:
1329 if (id.card < 0) {
1330 id.card = 0;
1331 } else {
1332 if (id.card < 0) {
1333 id.card = 0;
1334 } else {
1335 if (id.device < 0) {
1336 id.device = 0;
1337 } else {
6b172a85
CL		 1338 if (id.subdevice < 0) {
1339 id.subdevice = 0;
1340 } else {
1341 id.subdevice++;
1342 }
1da177e4
LT		 1343 }
1344 }
1345 }
1346 list_for_each(p, &snd_timer_list) {
53d2f744 1347 timer = list_entry(p, struct snd_timer, device_list);
1da177e4
LT		 1348 if (timer->tmr_class > id.dev_class) {
1349 snd_timer_user_copy_id(&id, timer);
1350 break;
1351 }
1352 if (timer->tmr_class < id.dev_class)
1353 continue;
1354 if (timer->card->number > id.card) {
1355 snd_timer_user_copy_id(&id, timer);
1356 break;
1357 }
1358 if (timer->card->number < id.card)
1359 continue;
1360 if (timer->tmr_device > id.device) {
1361 snd_timer_user_copy_id(&id, timer);
1362 break;
1363 }
1364 if (timer->tmr_device < id.device)
1365 continue;
1366 if (timer->tmr_subdevice > id.subdevice) {
1367 snd_timer_user_copy_id(&id, timer);
1368 break;
1369 }
1370 if (timer->tmr_subdevice < id.subdevice)
1371 continue;
1372 snd_timer_user_copy_id(&id, timer);
1373 break;
1374 }
1375 if (p == &snd_timer_list)
1376 snd_timer_user_zero_id(&id);
1377 break;
1378 default:
1379 snd_timer_user_zero_id(&id);
1380 }
1381 }
1382 up(&register_mutex);
1383 if (copy_to_user(_tid, &id, sizeof(*_tid)))
1384 return -EFAULT;
1385 return 0;
6b172a85 1386}
1da177e4 1387
6b172a85 1388static int snd_timer_user_ginfo(struct file *file,
53d2f744 1389 struct snd_timer_ginfo __user *_ginfo)
1da177e4 1390{
53d2f744
TI		 1391 struct snd_timer_ginfo *ginfo;
1392 struct snd_timer_id tid;
1393 struct snd_timer *t;
1da177e4
LT		 1394 struct list_head *p;
1395 int err = 0;
1396
1397 ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL);
1398 if (! ginfo)
1399 return -ENOMEM;
1400 if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) {
1401 kfree(ginfo);
1402 return -EFAULT;
1403 }
1404 tid = ginfo->tid;
1405 memset(ginfo, 0, sizeof(*ginfo));
1406 ginfo->tid = tid;
1407 down(&register_mutex);
1408 t = snd_timer_find(&tid);
1409 if (t != NULL) {
1410 ginfo->card = t->card ? t->card->number : -1;
1411 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
1412 ginfo->flags |= SNDRV_TIMER_FLG_SLAVE;
1413 strlcpy(ginfo->id, t->id, sizeof(ginfo->id));
1414 strlcpy(ginfo->name, t->name, sizeof(ginfo->name));
1415 ginfo->resolution = t->hw.resolution;
1416 if (t->hw.resolution_min > 0) {
1417 ginfo->resolution_min = t->hw.resolution_min;
1418 ginfo->resolution_max = t->hw.resolution_max;
1419 }
1420 list_for_each(p, &t->open_list_head) {
1421 ginfo->clients++;
1422 }
1423 } else {
1424 err = -ENODEV;
1425 }
1426 up(&register_mutex);
1427 if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo)))
1428 err = -EFAULT;
1429 kfree(ginfo);
1430 return err;
1431}
1432
6b172a85 1433static int snd_timer_user_gparams(struct file *file,
53d2f744 1434 struct snd_timer_gparams __user *_gparams)
1da177e4 1435{
53d2f744
TI		 1436 struct snd_timer_gparams gparams;
1437 struct snd_timer *t;
1da177e4
LT		 1438 int err;
1439
1440 if (copy_from_user(&gparams, _gparams, sizeof(gparams)))
1441 return -EFAULT;
1442 down(&register_mutex);
1443 t = snd_timer_find(&gparams.tid);
6b172a85 1444 if (!t) {
1da177e4 1445 err = -ENODEV;
6b172a85
CL		 1446 goto _error;
1447 }
1448 if (!list_empty(&t->open_list_head)) {
1449 err = -EBUSY;
1450 goto _error;
1451 }
1452 if (!t->hw.set_period) {
1453 err = -ENOSYS;
1454 goto _error;
1da177e4 1455 }
6b172a85
CL		 1456 err = t->hw.set_period(t, gparams.period_num, gparams.period_den);
1457_error:
1da177e4
LT		 1458 up(&register_mutex);
1459 return err;
1460}
1461
6b172a85 1462static int snd_timer_user_gstatus(struct file *file,
53d2f744 1463 struct snd_timer_gstatus __user *_gstatus)
1da177e4 1464{
53d2f744
TI		 1465 struct snd_timer_gstatus gstatus;
1466 struct snd_timer_id tid;
1467 struct snd_timer *t;
1da177e4
LT		 1468 int err = 0;
1469
1470 if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus)))
1471 return -EFAULT;
1472 tid = gstatus.tid;
1473 memset(&gstatus, 0, sizeof(gstatus));
1474 gstatus.tid = tid;
1475 down(&register_mutex);
1476 t = snd_timer_find(&tid);
1477 if (t != NULL) {
1478 if (t->hw.c_resolution)
1479 gstatus.resolution = t->hw.c_resolution(t);
1480 else
1481 gstatus.resolution = t->hw.resolution;
1482 if (t->hw.precise_resolution) {
6b172a85
CL		 1483 t->hw.precise_resolution(t, &gstatus.resolution_num,
1484 &gstatus.resolution_den);
1da177e4
LT		 1485 } else {
1486 gstatus.resolution_num = gstatus.resolution;
1487 gstatus.resolution_den = 1000000000uL;
1488 }
1489 } else {
1490 err = -ENODEV;
1491 }
1492 up(&register_mutex);
1493 if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus)))
1494 err = -EFAULT;
1495 return err;
1496}
1497
6b172a85 1498static int snd_timer_user_tselect(struct file *file,
53d2f744 1499 struct snd_timer_select __user *_tselect)
1da177e4 1500{
53d2f744
TI		 1501 struct snd_timer_user *tu;
1502 struct snd_timer_select tselect;
1da177e4 1503 char str[32];
c1935b4d 1504 int err = 0;
6b172a85 1505
1da177e4 1506 tu = file->private_data;
c1935b4d
JK		 1507 down(&tu->tread_sem);
1508 if (tu->timeri) {
1da177e4 1509 snd_timer_close(tu->timeri);
c1935b4d
JK		 1510 tu->timeri = NULL;
1511 }
1512 if (copy_from_user(&tselect, _tselect, sizeof(tselect))) {
1513 err = -EFAULT;
1514 goto __err;
1515 }
1da177e4
LT		 1516 sprintf(str, "application %i", current->pid);
1517 if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE)
1518 tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION;
6b172a85
CL		 1519 err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid);
1520 if (err < 0)
c1935b4d 1521 goto __err;
1da177e4 1522
4d572776
JJ		 1523 kfree(tu->queue);
1524 tu->queue = NULL;
1525 kfree(tu->tqueue);
1526 tu->tqueue = NULL;
1da177e4 1527 if (tu->tread) {
53d2f744 1528 tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread),
6b172a85 1529 GFP_KERNEL);
c1935b4d
JK		 1530 if (tu->tqueue == NULL)
1531 err = -ENOMEM;
1da177e4 1532 } else {
53d2f744 1533 tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
6b172a85 1534 GFP_KERNEL);
c1935b4d
JK		 1535 if (tu->queue == NULL)
1536 err = -ENOMEM;
1da177e4 1537 }
6b172a85 1538
c1935b4d
JK		 1539 if (err < 0) {
1540 snd_timer_close(tu->timeri);
1541 tu->timeri = NULL;
1542 } else {
1543 tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST;
6b172a85
CL		 1544 tu->timeri->callback = tu->tread
1545 ? snd_timer_user_tinterrupt : snd_timer_user_interrupt;
c1935b4d
JK		 1546 tu->timeri->ccallback = snd_timer_user_ccallback;
1547 tu->timeri->callback_data = (void *)tu;
1548 }
1549
1550 __err:
1551 up(&tu->tread_sem);
1552 return err;
1da177e4
LT		 1553}
1554
6b172a85 1555static int snd_timer_user_info(struct file *file,
53d2f744 1556 struct snd_timer_info __user *_info)
1da177e4 1557{
53d2f744
TI		 1558 struct snd_timer_user *tu;
1559 struct snd_timer_info *info;
1560 struct snd_timer *t;
1da177e4
LT		 1561 int err = 0;
1562
1563 tu = file->private_data;
1564 snd_assert(tu->timeri != NULL, return -ENXIO);
1565 t = tu->timeri->timer;
1566 snd_assert(t != NULL, return -ENXIO);
1567
ca2c0966 1568 info = kzalloc(sizeof(*info), GFP_KERNEL);
1da177e4
LT		 1569 if (! info)
1570 return -ENOMEM;
1571 info->card = t->card ? t->card->number : -1;
1572 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
1573 info->flags |= SNDRV_TIMER_FLG_SLAVE;
1574 strlcpy(info->id, t->id, sizeof(info->id));
1575 strlcpy(info->name, t->name, sizeof(info->name));
1576 info->resolution = t->hw.resolution;
1577 if (copy_to_user(_info, info, sizeof(*_info)))
1578 err = -EFAULT;
1579 kfree(info);
1580 return err;
1581}
1582
6b172a85 1583static int snd_timer_user_params(struct file *file,
53d2f744 1584 struct snd_timer_params __user *_params)
1da177e4 1585{
53d2f744
TI		 1586 struct snd_timer_user *tu;
1587 struct snd_timer_params params;
1588 struct snd_timer *t;
1589 struct snd_timer_read *tr;
1590 struct snd_timer_tread *ttr;
1da177e4 1591 int err;
6b172a85 1592
1da177e4
LT		 1593 tu = file->private_data;
1594 snd_assert(tu->timeri != NULL, return -ENXIO);
1595 t = tu->timeri->timer;
1596 snd_assert(t != NULL, return -ENXIO);
1597 if (copy_from_user(&params, _params, sizeof(params)))
1598 return -EFAULT;
1599 if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) {
1600 err = -EINVAL;
1601 goto _end;
1602 }
6b172a85
CL		 1603 if (params.queue_size > 0 &&
1604 (params.queue_size < 32 || params.queue_size > 1024)) {
1da177e4
LT		 1605 err = -EINVAL;
1606 goto _end;
1607 }
1608 if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)|
1609 (1<<SNDRV_TIMER_EVENT_TICK)|
1610 (1<<SNDRV_TIMER_EVENT_START)|
1611 (1<<SNDRV_TIMER_EVENT_STOP)|
1612 (1<<SNDRV_TIMER_EVENT_CONTINUE)|
1613 (1<<SNDRV_TIMER_EVENT_PAUSE)|
a501dfa3
JK		 1614 (1<<SNDRV_TIMER_EVENT_SUSPEND)|
1615 (1<<SNDRV_TIMER_EVENT_RESUME)|
1da177e4
LT		 1616 (1<<SNDRV_TIMER_EVENT_MSTART)|
1617 (1<<SNDRV_TIMER_EVENT_MSTOP)|
1618 (1<<SNDRV_TIMER_EVENT_MCONTINUE)|
65d11d95
JK		 1619 (1<<SNDRV_TIMER_EVENT_MPAUSE)|
1620 (1<<SNDRV_TIMER_EVENT_MSUSPEND)|
a501dfa3 1621 (1<<SNDRV_TIMER_EVENT_MRESUME))) {
1da177e4
LT		 1622 err = -EINVAL;
1623 goto _end;
1624 }
1625 snd_timer_stop(tu->timeri);
1626 spin_lock_irq(&t->lock);
1627 tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO|
1628 SNDRV_TIMER_IFLG_EXCLUSIVE|
1629 SNDRV_TIMER_IFLG_EARLY_EVENT);
1630 if (params.flags & SNDRV_TIMER_PSFLG_AUTO)
1631 tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO;
1632 if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE)
1633 tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE;
1634 if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT)
1635 tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT;
1636 spin_unlock_irq(&t->lock);
6b172a85
CL		 1637 if (params.queue_size > 0 &&
1638 (unsigned int)tu->queue_size != params.queue_size) {
1da177e4 1639 if (tu->tread) {
6b172a85
CL		 1640 ttr = kmalloc(params.queue_size * sizeof(*ttr),
1641 GFP_KERNEL);
1da177e4
LT		 1642 if (ttr) {
1643 kfree(tu->tqueue);
1644 tu->queue_size = params.queue_size;
1645 tu->tqueue = ttr;
1646 }
1647 } else {
6b172a85
CL		 1648 tr = kmalloc(params.queue_size * sizeof(*tr),
1649 GFP_KERNEL);
1da177e4
LT		 1650 if (tr) {
1651 kfree(tu->queue);
1652 tu->queue_size = params.queue_size;
1653 tu->queue = tr;
1654 }
1655 }
1656 }
1657 tu->qhead = tu->qtail = tu->qused = 0;
1658 if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) {
1659 if (tu->tread) {
53d2f744 1660 struct snd_timer_tread tread;
1da177e4
LT		 1661 tread.event = SNDRV_TIMER_EVENT_EARLY;
1662 tread.tstamp.tv_sec = 0;
1663 tread.tstamp.tv_nsec = 0;
1664 tread.val = 0;
1665 snd_timer_user_append_to_tqueue(tu, &tread);
1666 } else {
53d2f744 1667 struct snd_timer_read *r = &tu->queue[0];
1da177e4
LT		 1668 r->resolution = 0;
1669 r->ticks = 0;
1670 tu->qused++;
1671 tu->qtail++;
1672 }
1da177e4
LT		 1673 }
1674 tu->filter = params.filter;
1675 tu->ticks = params.ticks;
1676 err = 0;
1677 _end:
1678 if (copy_to_user(_params, &params, sizeof(params)))
1679 return -EFAULT;
1680 return err;
1681}
1682
6b172a85 1683static int snd_timer_user_status(struct file *file,
53d2f744 1684 struct snd_timer_status __user *_status)
1da177e4 1685{
53d2f744
TI		 1686 struct snd_timer_user *tu;
1687 struct snd_timer_status status;
6b172a85 1688
1da177e4
LT		 1689 tu = file->private_data;
1690 snd_assert(tu->timeri != NULL, return -ENXIO);
1691 memset(&status, 0, sizeof(status));
1692 status.tstamp = tu->tstamp;
1693 status.resolution = snd_timer_resolution(tu->timeri);
1694 status.lost = tu->timeri->lost;
1695 status.overrun = tu->overrun;
1696 spin_lock_irq(&tu->qlock);
1697 status.queue = tu->qused;
1698 spin_unlock_irq(&tu->qlock);
1699 if (copy_to_user(_status, &status, sizeof(status)))
1700 return -EFAULT;
1701 return 0;
1702}
1703
1704static int snd_timer_user_start(struct file *file)
1705{
1706 int err;
53d2f744 1707 struct snd_timer_user *tu;
6b172a85 1708
1da177e4
LT		 1709 tu = file->private_data;
1710 snd_assert(tu->timeri != NULL, return -ENXIO);
1711 snd_timer_stop(tu->timeri);
1712 tu->timeri->lost = 0;
1713 tu->last_resolution = 0;
1714 return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0;
1715}
1716
1717static int snd_timer_user_stop(struct file *file)
1718{
1719 int err;
53d2f744 1720 struct snd_timer_user *tu;
6b172a85 1721
1da177e4
LT		 1722 tu = file->private_data;
1723 snd_assert(tu->timeri != NULL, return -ENXIO);
1724 return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0;
1725}
1726
1727static int snd_timer_user_continue(struct file *file)
1728{
1729 int err;
53d2f744 1730 struct snd_timer_user *tu;
6b172a85 1731
1da177e4
LT		 1732 tu = file->private_data;
1733 snd_assert(tu->timeri != NULL, return -ENXIO);
1734 tu->timeri->lost = 0;
1735 return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0;
1736}
1737
15790a6b
TI		 1738static int snd_timer_user_pause(struct file *file)
1739{
1740 int err;
53d2f744 1741 struct snd_timer_user *tu;
6b172a85 1742
15790a6b
TI		 1743 tu = file->private_data;
1744 snd_assert(tu->timeri != NULL, return -ENXIO);
d138b445 1745 return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0;
15790a6b
TI		 1746}
1747
8c50b37c
TI		 1748enum {
1749 SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20),
1750 SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21),
1751 SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22),
1752 SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23),
1753};
1754
6b172a85
CL		 1755static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
1756 unsigned long arg)
1da177e4 1757{
53d2f744 1758 struct snd_timer_user *tu;
1da177e4
LT		 1759 void __user *argp = (void __user *)arg;
1760 int __user *p = argp;
6b172a85 1761
1da177e4
LT		 1762 tu = file->private_data;
1763 switch (cmd) {
1764 case SNDRV_TIMER_IOCTL_PVERSION:
1765 return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0;
1766 case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
1767 return snd_timer_user_next_device(argp);
1768 case SNDRV_TIMER_IOCTL_TREAD:
1769 {
1770 int xarg;
6b172a85 1771
c1935b4d
JK		 1772 down(&tu->tread_sem);
1773 if (tu->timeri) { /* too late */
1774 up(&tu->tread_sem);
1da177e4 1775 return -EBUSY;
c1935b4d
JK		 1776 }
1777 if (get_user(xarg, p)) {
1778 up(&tu->tread_sem);
1da177e4 1779 return -EFAULT;
c1935b4d 1780 }
1da177e4 1781 tu->tread = xarg ? 1 : 0;
c1935b4d 1782 up(&tu->tread_sem);
1da177e4
LT		 1783 return 0;
1784 }
1785 case SNDRV_TIMER_IOCTL_GINFO:
1786 return snd_timer_user_ginfo(file, argp);
1787 case SNDRV_TIMER_IOCTL_GPARAMS:
1788 return snd_timer_user_gparams(file, argp);
1789 case SNDRV_TIMER_IOCTL_GSTATUS:
1790 return snd_timer_user_gstatus(file, argp);
1791 case SNDRV_TIMER_IOCTL_SELECT:
1792 return snd_timer_user_tselect(file, argp);
1793 case SNDRV_TIMER_IOCTL_INFO:
1794 return snd_timer_user_info(file, argp);
1795 case SNDRV_TIMER_IOCTL_PARAMS:
1796 return snd_timer_user_params(file, argp);
1797 case SNDRV_TIMER_IOCTL_STATUS:
1798 return snd_timer_user_status(file, argp);
1799 case SNDRV_TIMER_IOCTL_START:
8c50b37c 1800 case SNDRV_TIMER_IOCTL_START_OLD:
1da177e4
LT		 1801 return snd_timer_user_start(file);
1802 case SNDRV_TIMER_IOCTL_STOP:
8c50b37c 1803 case SNDRV_TIMER_IOCTL_STOP_OLD:
1da177e4
LT		 1804 return snd_timer_user_stop(file);
1805 case SNDRV_TIMER_IOCTL_CONTINUE:
8c50b37c 1806 case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
1da177e4 1807 return snd_timer_user_continue(file);
15790a6b 1808 case SNDRV_TIMER_IOCTL_PAUSE:
8c50b37c 1809 case SNDRV_TIMER_IOCTL_PAUSE_OLD:
15790a6b 1810 return snd_timer_user_pause(file);
1da177e4
LT		 1811 }
1812 return -ENOTTY;
1813}
1814
1815static int snd_timer_user_fasync(int fd, struct file * file, int on)
1816{
53d2f744 1817 struct snd_timer_user *tu;
1da177e4 1818 int err;
6b172a85 1819
1da177e4
LT		 1820 tu = file->private_data;
1821 err = fasync_helper(fd, file, on, &tu->fasync);
1822 if (err < 0)
1823 return err;
1824 return 0;
1825}
1826
6b172a85
CL		 1827static ssize_t snd_timer_user_read(struct file *file, char __user *buffer,
1828 size_t count, loff_t *offset)
1da177e4 1829{
53d2f744 1830 struct snd_timer_user *tu;
1da177e4
LT		 1831 long result = 0, unit;
1832 int err = 0;
6b172a85 1833
1da177e4 1834 tu = file->private_data;
53d2f744 1835 unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read);
1da177e4
LT		 1836 spin_lock_irq(&tu->qlock);
1837 while ((long)count - result >= unit) {
1838 while (!tu->qused) {
1839 wait_queue_t wait;
1840
1841 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
1842 err = -EAGAIN;
1843 break;
1844 }
1845
1846 set_current_state(TASK_INTERRUPTIBLE);
1847 init_waitqueue_entry(&wait, current);
1848 add_wait_queue(&tu->qchange_sleep, &wait);
1849
1850 spin_unlock_irq(&tu->qlock);
1851 schedule();
1852 spin_lock_irq(&tu->qlock);
1853
1854 remove_wait_queue(&tu->qchange_sleep, &wait);
1855
1856 if (signal_pending(current)) {
1857 err = -ERESTARTSYS;
1858 break;
1859 }
1860 }
1861
1862 spin_unlock_irq(&tu->qlock);
1863 if (err < 0)
1864 goto _error;
1865
1866 if (tu->tread) {
6b172a85 1867 if (copy_to_user(buffer, &tu->tqueue[tu->qhead++],
53d2f744 1868 sizeof(struct snd_timer_tread))) {
1da177e4
LT		 1869 err = -EFAULT;
1870 goto _error;
1871 }
1872 } else {
6b172a85 1873 if (copy_to_user(buffer, &tu->queue[tu->qhead++],
53d2f744 1874 sizeof(struct snd_timer_read))) {
1da177e4
LT		 1875 err = -EFAULT;
1876 goto _error;
1877 }
1878 }
1879
1880 tu->qhead %= tu->queue_size;
1881
1882 result += unit;
1883 buffer += unit;
1884
1885 spin_lock_irq(&tu->qlock);
1886 tu->qused--;
1887 }
1888 spin_unlock_irq(&tu->qlock);
1889 _error:
1890 return result > 0 ? result : err;
1891}
1892
1893static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait)
1894{
1895 unsigned int mask;
53d2f744 1896 struct snd_timer_user *tu;
1da177e4
LT		 1897
1898 tu = file->private_data;
1899
1900 poll_wait(file, &tu->qchange_sleep, wait);
6b172a85 1901
1da177e4
LT		 1902 mask = 0;
1903 if (tu->qused)
1904 mask |= POLLIN | POLLRDNORM;
1905
1906 return mask;
1907}
1908
1909#ifdef CONFIG_COMPAT
1910#include "timer_compat.c"
1911#else
1912#define snd_timer_user_ioctl_compat NULL
1913#endif
1914
1915static struct file_operations snd_timer_f_ops =
1916{
1917 .owner = THIS_MODULE,
1918 .read = snd_timer_user_read,
1919 .open = snd_timer_user_open,
1920 .release = snd_timer_user_release,
1921 .poll = snd_timer_user_poll,
1922 .unlocked_ioctl = snd_timer_user_ioctl,
1923 .compat_ioctl = snd_timer_user_ioctl_compat,
1924 .fasync = snd_timer_user_fasync,
1925};
1926
1da177e4
LT		 1927/*
1928 * ENTRY functions
1929 */
1930
53d2f744 1931static struct snd_info_entry *snd_timer_proc_entry = NULL;
1da177e4
LT		 1932
1933static int __init alsa_timer_init(void)
1934{
1935 int err;
53d2f744 1936 struct snd_info_entry *entry;
1da177e4
LT		 1937
1938#ifdef SNDRV_OSS_INFO_DEV_TIMERS
6b172a85
CL		 1939 snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1,
1940 "system timer");
1da177e4 1941#endif
6b172a85
CL		 1942 entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL);
1943 if (entry != NULL) {
1da177e4
LT		 1944 entry->c.text.read_size = SNDRV_TIMER_DEVICES * 128;
1945 entry->c.text.read = snd_timer_proc_read;
1946 if (snd_info_register(entry) < 0) {
1947 snd_info_free_entry(entry);
1948 entry = NULL;
1949 }
1950 }
1951 snd_timer_proc_entry = entry;
1952 if ((err = snd_timer_register_system()) < 0)
6b172a85
CL		 1953 snd_printk(KERN_ERR "unable to register system timer (%i)\n",
1954 err);
f87135f5
CL		 1955 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0,
1956 &snd_timer_f_ops, NULL, "timer")) < 0)
6b172a85
CL		 1957 snd_printk(KERN_ERR "unable to register timer device (%i)\n",
1958 err);
1da177e4
LT		 1959 return 0;
1960}
1961
1962static 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);
1da177e4
LT		 1970 snd_timer_unregister(timer);
1971 }
1972 if (snd_timer_proc_entry) {
1973 snd_info_unregister(snd_timer_proc_entry);
1974 snd_timer_proc_entry = NULL;
1975 }
1976#ifdef SNDRV_OSS_INFO_DEV_TIMERS
1977 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1);
1978#endif
1979}
1980
1981module_init(alsa_timer_init)
1982module_exit(alsa_timer_exit)
1983
1984EXPORT_SYMBOL(snd_timer_open);
1985EXPORT_SYMBOL(snd_timer_close);
1986EXPORT_SYMBOL(snd_timer_resolution);
1987EXPORT_SYMBOL(snd_timer_start);
1988EXPORT_SYMBOL(snd_timer_stop);
1989EXPORT_SYMBOL(snd_timer_continue);
1990EXPORT_SYMBOL(snd_timer_pause);
1991EXPORT_SYMBOL(snd_timer_new);
1992EXPORT_SYMBOL(snd_timer_notify);
1993EXPORT_SYMBOL(snd_timer_global_new);
1994EXPORT_SYMBOL(snd_timer_global_free);
1995EXPORT_SYMBOL(snd_timer_global_register);
1996EXPORT_SYMBOL(snd_timer_global_unregister);
1997EXPORT_SYMBOL(snd_timer_interrupt);
kernel source for telekom puls (alcatel/mediatek)