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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/init.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
65a77217 | 28 | #include <linux/module.h> |
543537bd | 29 | #include <linux/string.h> |
174cd4b1 | 30 | #include <linux/sched/signal.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> | |
1da177e4 | 38 | |
9f8a7658 TI |
39 | /* internal flags */ |
40 | #define SNDRV_TIMER_IFLG_PAUSED 0x00010000 | |
41 | ||
8eeaa2f9 | 42 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
109fef9e | 43 | #define DEFAULT_TIMER_LIMIT 4 |
1da177e4 LT |
44 | #else |
45 | #define DEFAULT_TIMER_LIMIT 1 | |
46 | #endif | |
47 | ||
48 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 49 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 50 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
51 | MODULE_DESCRIPTION("ALSA timer interface"); |
52 | MODULE_LICENSE("GPL"); | |
53 | module_param(timer_limit, int, 0444); | |
54 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
55 | module_param(timer_tstamp_monotonic, int, 0444); |
56 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 57 | |
03cfe6f5 KS |
58 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
59 | MODULE_ALIAS("devname:snd/timer"); | |
60 | ||
53d2f744 TI |
61 | struct snd_timer_user { |
62 | struct snd_timer_instance *timeri; | |
6b172a85 | 63 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
64 | unsigned long ticks; |
65 | unsigned long overrun; | |
66 | int qhead; | |
67 | int qtail; | |
68 | int qused; | |
69 | int queue_size; | |
230323da | 70 | bool disconnected; |
53d2f744 TI |
71 | struct snd_timer_read *queue; |
72 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
73 | spinlock_t qlock; |
74 | unsigned long last_resolution; | |
75 | unsigned int filter; | |
76 | struct timespec tstamp; /* trigger tstamp */ | |
77 | wait_queue_head_t qchange_sleep; | |
78 | struct fasync_struct *fasync; | |
af368027 | 79 | struct mutex ioctl_lock; |
53d2f744 | 80 | }; |
1da177e4 LT |
81 | |
82 | /* list of timers */ | |
83 | static LIST_HEAD(snd_timer_list); | |
84 | ||
85 | /* list of slave instances */ | |
86 | static LIST_HEAD(snd_timer_slave_list); | |
87 | ||
88 | /* lock for slave active lists */ | |
89 | static DEFINE_SPINLOCK(slave_active_lock); | |
90 | ||
1a60d4c5 | 91 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 92 | |
53d2f744 TI |
93 | static int snd_timer_free(struct snd_timer *timer); |
94 | static int snd_timer_dev_free(struct snd_device *device); | |
95 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 96 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 97 | |
53d2f744 | 98 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
99 | |
100 | /* | |
101 | * create a timer instance with the given owner string. | |
102 | * when timer is not NULL, increments the module counter | |
103 | */ | |
53d2f744 TI |
104 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
105 | struct snd_timer *timer) | |
1da177e4 | 106 | { |
53d2f744 | 107 | struct snd_timer_instance *timeri; |
ca2c0966 | 108 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
109 | if (timeri == NULL) |
110 | return NULL; | |
543537bd | 111 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
112 | if (! timeri->owner) { |
113 | kfree(timeri); | |
114 | return NULL; | |
115 | } | |
116 | INIT_LIST_HEAD(&timeri->open_list); | |
117 | INIT_LIST_HEAD(&timeri->active_list); | |
118 | INIT_LIST_HEAD(&timeri->ack_list); | |
119 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
120 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
121 | ||
122 | timeri->timer = timer; | |
de24214d | 123 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
124 | kfree(timeri->owner); |
125 | kfree(timeri); | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | return timeri; | |
130 | } | |
131 | ||
132 | /* | |
133 | * find a timer instance from the given timer id | |
134 | */ | |
53d2f744 | 135 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 136 | { |
53d2f744 | 137 | struct snd_timer *timer = NULL; |
1da177e4 | 138 | |
9244b2c3 | 139 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
140 | if (timer->tmr_class != tid->dev_class) |
141 | continue; | |
142 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
143 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
144 | (timer->card == NULL || | |
145 | timer->card->number != tid->card)) | |
146 | continue; | |
147 | if (timer->tmr_device != tid->device) | |
148 | continue; | |
149 | if (timer->tmr_subdevice != tid->subdevice) | |
150 | continue; | |
151 | return timer; | |
152 | } | |
153 | return NULL; | |
154 | } | |
155 | ||
ee2da997 | 156 | #ifdef CONFIG_MODULES |
1da177e4 | 157 | |
53d2f744 | 158 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 159 | { |
1da177e4 LT |
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 | |
188 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
189 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
190 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
191 | if (slave->slave_class == master->slave_class && |
192 | slave->slave_id == master->slave_id) { | |
5b7c757d NK |
193 | list_move_tail(&slave->open_list, |
194 | &master->slave_list_head); | |
1da177e4 LT |
195 | spin_lock_irq(&slave_active_lock); |
196 | slave->master = master; | |
197 | slave->timer = master->timer; | |
198 | spin_unlock_irq(&slave_active_lock); | |
199 | return; | |
200 | } | |
201 | } | |
202 | } | |
203 | } | |
204 | ||
205 | /* | |
206 | * look for slave instances matching with the slave id of the given master. | |
207 | * when found, relink the open_link of slaves. | |
208 | * | |
209 | * call this with register_mutex down. | |
210 | */ | |
53d2f744 | 211 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 212 | { |
9244b2c3 | 213 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
214 | |
215 | /* check all pending slaves */ | |
9244b2c3 | 216 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
217 | if (slave->slave_class == master->slave_class && |
218 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 219 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 | 220 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 221 | spin_lock(&master->timer->lock); |
1da177e4 LT |
222 | slave->master = master; |
223 | slave->timer = master->timer; | |
224 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
225 | list_add_tail(&slave->active_list, |
226 | &master->slave_active_head); | |
b5a663aa | 227 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
228 | spin_unlock_irq(&slave_active_lock); |
229 | } | |
230 | } | |
231 | } | |
232 | ||
233 | /* | |
234 | * open a timer instance | |
235 | * when opening a master, the slave id must be here given. | |
236 | */ | |
53d2f744 TI |
237 | int snd_timer_open(struct snd_timer_instance **ti, |
238 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
239 | unsigned int slave_id) |
240 | { | |
53d2f744 TI |
241 | struct snd_timer *timer; |
242 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 243 | |
1da177e4 LT |
244 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
245 | /* open a slave instance */ | |
246 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
247 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
248 | pr_debug("ALSA: timer: invalid slave class %i\n", |
249 | tid->dev_sclass); | |
1da177e4 LT |
250 | return -EINVAL; |
251 | } | |
1a60d4c5 | 252 | mutex_lock(®ister_mutex); |
1da177e4 | 253 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 254 | if (!timeri) { |
1a60d4c5 | 255 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
256 | return -ENOMEM; |
257 | } | |
1da177e4 LT |
258 | timeri->slave_class = tid->dev_sclass; |
259 | timeri->slave_id = tid->device; | |
260 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
261 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
262 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 263 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
264 | *ti = timeri; |
265 | return 0; | |
266 | } | |
267 | ||
268 | /* open a master instance */ | |
1a60d4c5 | 269 | mutex_lock(®ister_mutex); |
1da177e4 | 270 | timer = snd_timer_find(tid); |
ee2da997 JB |
271 | #ifdef CONFIG_MODULES |
272 | if (!timer) { | |
1a60d4c5 | 273 | mutex_unlock(®ister_mutex); |
1da177e4 | 274 | snd_timer_request(tid); |
1a60d4c5 | 275 | mutex_lock(®ister_mutex); |
1da177e4 LT |
276 | timer = snd_timer_find(tid); |
277 | } | |
278 | #endif | |
2fd43d11 | 279 | if (!timer) { |
1a60d4c5 | 280 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
281 | return -ENODEV; |
282 | } | |
2fd43d11 CL |
283 | if (!list_empty(&timer->open_list_head)) { |
284 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 285 | struct snd_timer_instance, open_list); |
2fd43d11 | 286 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 287 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
288 | return -EBUSY; |
289 | } | |
290 | } | |
291 | timeri = snd_timer_instance_new(owner, timer); | |
292 | if (!timeri) { | |
1a60d4c5 | 293 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
294 | return -ENOMEM; |
295 | } | |
230323da TI |
296 | /* take a card refcount for safe disconnection */ |
297 | if (timer->card) | |
298 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
299 | timeri->slave_class = tid->dev_sclass; |
300 | timeri->slave_id = slave_id; | |
8ddc0563 VN |
301 | |
302 | if (list_empty(&timer->open_list_head) && timer->hw.open) { | |
303 | int err = timer->hw.open(timer); | |
304 | if (err) { | |
305 | kfree(timeri->owner); | |
306 | kfree(timeri); | |
307 | ||
308 | if (timer->card) | |
309 | put_device(&timer->card->card_dev); | |
310 | module_put(timer->module); | |
311 | mutex_unlock(®ister_mutex); | |
312 | return err; | |
313 | } | |
314 | } | |
315 | ||
2fd43d11 CL |
316 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
317 | snd_timer_check_master(timeri); | |
1a60d4c5 | 318 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
319 | *ti = timeri; |
320 | return 0; | |
321 | } | |
322 | ||
1da177e4 LT |
323 | /* |
324 | * close a timer instance | |
325 | */ | |
53d2f744 | 326 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 327 | { |
53d2f744 | 328 | struct snd_timer *timer = NULL; |
9244b2c3 | 329 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 330 | |
0072889a | 331 | if (snd_BUG_ON(!timeri)) |
7eaa943c | 332 | return -ENXIO; |
1da177e4 | 333 | |
9984d1b5 TI |
334 | mutex_lock(®ister_mutex); |
335 | list_del(&timeri->open_list); | |
336 | ||
1da177e4 LT |
337 | /* force to stop the timer */ |
338 | snd_timer_stop(timeri); | |
339 | ||
9984d1b5 TI |
340 | timer = timeri->timer; |
341 | if (timer) { | |
1da177e4 LT |
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); | |
9984d1b5 | 350 | |
1da177e4 | 351 | /* remove slave links */ |
b5a663aa TI |
352 | spin_lock_irq(&slave_active_lock); |
353 | spin_lock(&timer->lock); | |
9244b2c3 JB |
354 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
355 | open_list) { | |
9244b2c3 | 356 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
357 | slave->master = NULL; |
358 | slave->timer = NULL; | |
b5a663aa TI |
359 | list_del_init(&slave->ack_list); |
360 | list_del_init(&slave->active_list); | |
1da177e4 | 361 | } |
b5a663aa TI |
362 | spin_unlock(&timer->lock); |
363 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
364 | |
365 | /* slave doesn't need to release timer resources below */ | |
366 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
367 | timer = NULL; | |
1da177e4 | 368 | } |
9984d1b5 | 369 | |
1da177e4 LT |
370 | if (timeri->private_free) |
371 | timeri->private_free(timeri); | |
372 | kfree(timeri->owner); | |
373 | kfree(timeri); | |
9984d1b5 TI |
374 | |
375 | if (timer) { | |
376 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
377 | timer->hw.close(timer); | |
378 | /* release a card refcount for safe disconnection */ | |
379 | if (timer->card) | |
380 | put_device(&timer->card->card_dev); | |
de24214d | 381 | module_put(timer->module); |
9984d1b5 TI |
382 | } |
383 | ||
384 | mutex_unlock(®ister_mutex); | |
1da177e4 LT |
385 | return 0; |
386 | } | |
387 | ||
53d2f744 | 388 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 389 | { |
53d2f744 | 390 | struct snd_timer * timer; |
1da177e4 LT |
391 | |
392 | if (timeri == NULL) | |
393 | return 0; | |
394 | if ((timer = timeri->timer) != NULL) { | |
395 | if (timer->hw.c_resolution) | |
396 | return timer->hw.c_resolution(timer); | |
397 | return timer->hw.resolution; | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | ||
53d2f744 | 402 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 403 | { |
53d2f744 | 404 | struct snd_timer *timer; |
1da177e4 | 405 | unsigned long resolution = 0; |
53d2f744 | 406 | struct snd_timer_instance *ts; |
1da177e4 LT |
407 | struct timespec tstamp; |
408 | ||
b751eef1 | 409 | if (timer_tstamp_monotonic) |
26204e04 | 410 | ktime_get_ts(&tstamp); |
b751eef1 JK |
411 | else |
412 | getnstimeofday(&tstamp); | |
7eaa943c TI |
413 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
414 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
415 | return; | |
6b172a85 CL |
416 | if (event == SNDRV_TIMER_EVENT_START || |
417 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
418 | resolution = snd_timer_resolution(ti); |
419 | if (ti->ccallback) | |
b30477d5 | 420 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
421 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
422 | return; | |
423 | timer = ti->timer; | |
424 | if (timer == NULL) | |
425 | return; | |
426 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
427 | return; | |
9244b2c3 | 428 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 429 | if (ts->ccallback) |
117159f0 | 430 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
431 | } |
432 | ||
f65e0d29 TI |
433 | /* start/continue a master timer */ |
434 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
435 | bool start, unsigned long ticks) | |
1da177e4 | 436 | { |
f65e0d29 TI |
437 | struct snd_timer *timer; |
438 | int result; | |
439 | unsigned long flags; | |
440 | ||
441 | timer = timeri->timer; | |
442 | if (!timer) | |
443 | return -EINVAL; | |
444 | ||
445 | spin_lock_irqsave(&timer->lock, flags); | |
446 | if (timer->card && timer->card->shutdown) { | |
447 | result = -ENODEV; | |
448 | goto unlock; | |
449 | } | |
450 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
451 | SNDRV_TIMER_IFLG_START)) { | |
452 | result = -EBUSY; | |
453 | goto unlock; | |
454 | } | |
455 | ||
456 | if (start) | |
457 | timeri->ticks = timeri->cticks = ticks; | |
458 | else if (!timeri->cticks) | |
459 | timeri->cticks = 1; | |
460 | timeri->pticks = 0; | |
461 | ||
5b7c757d | 462 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
463 | if (timer->running) { |
464 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
465 | goto __start_now; | |
466 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
467 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 468 | result = 1; /* delayed start */ |
1da177e4 | 469 | } else { |
f65e0d29 TI |
470 | if (start) |
471 | timer->sticks = ticks; | |
1da177e4 LT |
472 | timer->hw.start(timer); |
473 | __start_now: | |
474 | timer->running++; | |
475 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 476 | result = 0; |
1da177e4 | 477 | } |
f65e0d29 TI |
478 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
479 | SNDRV_TIMER_EVENT_CONTINUE); | |
480 | unlock: | |
481 | spin_unlock_irqrestore(&timer->lock, flags); | |
482 | return result; | |
1da177e4 LT |
483 | } |
484 | ||
f65e0d29 TI |
485 | /* start/continue a slave timer */ |
486 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
487 | bool start) | |
1da177e4 LT |
488 | { |
489 | unsigned long flags; | |
490 | ||
491 | spin_lock_irqsave(&slave_active_lock, flags); | |
f784beb7 TI |
492 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
493 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
494 | return -EBUSY; | |
495 | } | |
1da177e4 | 496 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
497 | if (timeri->master && timeri->timer) { |
498 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
499 | list_add_tail(&timeri->active_list, |
500 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
501 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
502 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
503 | spin_unlock(&timeri->timer->lock); |
504 | } | |
1da177e4 LT |
505 | spin_unlock_irqrestore(&slave_active_lock, flags); |
506 | return 1; /* delayed start */ | |
507 | } | |
508 | ||
f65e0d29 TI |
509 | /* stop/pause a master timer */ |
510 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 511 | { |
53d2f744 | 512 | struct snd_timer *timer; |
f65e0d29 | 513 | int result = 0; |
1da177e4 LT |
514 | unsigned long flags; |
515 | ||
1da177e4 LT |
516 | timer = timeri->timer; |
517 | if (!timer) | |
518 | return -EINVAL; | |
519 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
520 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
521 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
522 | result = -EBUSY; |
523 | goto unlock; | |
f784beb7 | 524 | } |
1da177e4 LT |
525 | list_del_init(&timeri->ack_list); |
526 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
527 | if (timer->card && timer->card->shutdown) |
528 | goto unlock; | |
529 | if (stop) { | |
530 | timeri->cticks = timeri->ticks; | |
531 | timeri->pticks = 0; | |
230323da | 532 | } |
1da177e4 LT |
533 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
534 | !(--timer->running)) { | |
535 | timer->hw.stop(timer); | |
536 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
537 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
538 | snd_timer_reschedule(timer, 0); | |
539 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
540 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
541 | timer->hw.start(timer); | |
542 | } | |
543 | } | |
544 | } | |
c3b16813 | 545 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
9f8a7658 TI |
546 | if (stop) |
547 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; | |
548 | else | |
549 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; | |
f65e0d29 TI |
550 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
551 | SNDRV_TIMER_EVENT_CONTINUE); | |
552 | unlock: | |
1da177e4 | 553 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
554 | return result; |
555 | } | |
556 | ||
557 | /* stop/pause a slave timer */ | |
558 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
559 | { | |
560 | unsigned long flags; | |
561 | ||
562 | spin_lock_irqsave(&slave_active_lock, flags); | |
563 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
564 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
565 | return -EBUSY; | |
566 | } | |
567 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
568 | if (timeri->timer) { | |
569 | spin_lock(&timeri->timer->lock); | |
570 | list_del_init(&timeri->ack_list); | |
571 | list_del_init(&timeri->active_list); | |
572 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
573 | SNDRV_TIMER_EVENT_CONTINUE); | |
574 | spin_unlock(&timeri->timer->lock); | |
575 | } | |
576 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
577 | return 0; |
578 | } | |
579 | ||
f65e0d29 TI |
580 | /* |
581 | * start the timer instance | |
582 | */ | |
583 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
584 | { | |
585 | if (timeri == NULL || ticks < 1) | |
586 | return -EINVAL; | |
587 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
588 | return snd_timer_start_slave(timeri, true); | |
589 | else | |
590 | return snd_timer_start1(timeri, true, ticks); | |
591 | } | |
592 | ||
1da177e4 LT |
593 | /* |
594 | * stop the timer instance. | |
595 | * | |
596 | * do not call this from the timer callback! | |
597 | */ | |
53d2f744 | 598 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 599 | { |
f65e0d29 TI |
600 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
601 | return snd_timer_stop_slave(timeri, true); | |
602 | else | |
603 | return snd_timer_stop1(timeri, true); | |
1da177e4 LT |
604 | } |
605 | ||
606 | /* | |
607 | * start again.. the tick is kept. | |
608 | */ | |
53d2f744 | 609 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 610 | { |
9f8a7658 TI |
611 | /* timer can continue only after pause */ |
612 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
613 | return -EINVAL; | |
614 | ||
1da177e4 | 615 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
616 | return snd_timer_start_slave(timeri, false); |
617 | else | |
618 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 LT |
619 | } |
620 | ||
621 | /* | |
622 | * pause.. remember the ticks left | |
623 | */ | |
53d2f744 | 624 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 625 | { |
f65e0d29 TI |
626 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
627 | return snd_timer_stop_slave(timeri, false); | |
628 | else | |
629 | return snd_timer_stop1(timeri, false); | |
1da177e4 LT |
630 | } |
631 | ||
632 | /* | |
633 | * reschedule the timer | |
634 | * | |
635 | * start pending instances and check the scheduling ticks. | |
636 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
637 | */ | |
53d2f744 | 638 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 639 | { |
53d2f744 | 640 | struct snd_timer_instance *ti; |
1da177e4 | 641 | unsigned long ticks = ~0UL; |
1da177e4 | 642 | |
9244b2c3 | 643 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
644 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
645 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
646 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
647 | timer->running++; | |
648 | } | |
649 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
650 | if (ticks > ti->cticks) | |
651 | ticks = ti->cticks; | |
652 | } | |
653 | } | |
654 | if (ticks == ~0UL) { | |
655 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
656 | return; | |
657 | } | |
658 | if (ticks > timer->hw.ticks) | |
659 | ticks = timer->hw.ticks; | |
660 | if (ticks_left != ticks) | |
661 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
662 | timer->sticks = ticks; | |
663 | } | |
664 | ||
665 | /* | |
666 | * timer tasklet | |
667 | * | |
668 | */ | |
669 | static void snd_timer_tasklet(unsigned long arg) | |
670 | { | |
53d2f744 TI |
671 | struct snd_timer *timer = (struct snd_timer *) arg; |
672 | struct snd_timer_instance *ti; | |
1da177e4 LT |
673 | struct list_head *p; |
674 | unsigned long resolution, ticks; | |
2999ff5b | 675 | unsigned long flags; |
1da177e4 | 676 | |
230323da TI |
677 | if (timer->card && timer->card->shutdown) |
678 | return; | |
679 | ||
2999ff5b | 680 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
681 | /* now process all callbacks */ |
682 | while (!list_empty(&timer->sack_list_head)) { | |
683 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 684 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
685 | |
686 | /* remove from ack_list and make empty */ | |
687 | list_del_init(p); | |
6b172a85 | 688 | |
1da177e4 LT |
689 | ticks = ti->pticks; |
690 | ti->pticks = 0; | |
691 | resolution = ti->resolution; | |
692 | ||
693 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
694 | spin_unlock(&timer->lock); | |
695 | if (ti->callback) | |
696 | ti->callback(ti, resolution, ticks); | |
697 | spin_lock(&timer->lock); | |
698 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
699 | } | |
2999ff5b | 700 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
701 | } |
702 | ||
703 | /* | |
704 | * timer interrupt | |
705 | * | |
706 | * ticks_left is usually equal to timer->sticks. | |
707 | * | |
708 | */ | |
53d2f744 | 709 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 710 | { |
9244b2c3 | 711 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 712 | unsigned long resolution, ticks; |
9244b2c3 | 713 | struct list_head *p, *ack_list_head; |
b32425ac | 714 | unsigned long flags; |
1da177e4 LT |
715 | int use_tasklet = 0; |
716 | ||
717 | if (timer == NULL) | |
718 | return; | |
719 | ||
230323da TI |
720 | if (timer->card && timer->card->shutdown) |
721 | return; | |
722 | ||
b32425ac | 723 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
724 | |
725 | /* remember the current resolution */ | |
726 | if (timer->hw.c_resolution) | |
727 | resolution = timer->hw.c_resolution(timer); | |
728 | else | |
729 | resolution = timer->hw.resolution; | |
730 | ||
731 | /* loop for all active instances | |
9244b2c3 | 732 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
733 | * processed instance is relinked to done_list_head before the callback |
734 | * is called. | |
1da177e4 | 735 | */ |
9244b2c3 JB |
736 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
737 | active_list) { | |
1da177e4 LT |
738 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
739 | continue; | |
740 | ti->pticks += ticks_left; | |
741 | ti->resolution = resolution; | |
742 | if (ti->cticks < ticks_left) | |
743 | ti->cticks = 0; | |
744 | else | |
745 | ti->cticks -= ticks_left; | |
746 | if (ti->cticks) /* not expired */ | |
747 | continue; | |
748 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
749 | ti->cticks = ti->ticks; | |
750 | } else { | |
751 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
752 | --timer->running; |
753 | list_del_init(&ti->active_list); | |
1da177e4 | 754 | } |
6b172a85 CL |
755 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
756 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
757 | ack_list_head = &timer->ack_list_head; | |
758 | else | |
759 | ack_list_head = &timer->sack_list_head; | |
760 | if (list_empty(&ti->ack_list)) | |
761 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 762 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
763 | ts->pticks = ti->pticks; |
764 | ts->resolution = resolution; | |
6b172a85 CL |
765 | if (list_empty(&ts->ack_list)) |
766 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
767 | } |
768 | } | |
769 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 770 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
771 | if (timer->running) { |
772 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
773 | timer->hw.stop(timer); | |
774 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
775 | } | |
776 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
777 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
778 | /* restart timer */ | |
779 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
780 | timer->hw.start(timer); | |
781 | } | |
782 | } else { | |
783 | timer->hw.stop(timer); | |
784 | } | |
785 | ||
786 | /* now process all fast callbacks */ | |
787 | while (!list_empty(&timer->ack_list_head)) { | |
788 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 789 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 790 | |
1da177e4 LT |
791 | /* remove from ack_list and make empty */ |
792 | list_del_init(p); | |
6b172a85 | 793 | |
1da177e4 LT |
794 | ticks = ti->pticks; |
795 | ti->pticks = 0; | |
796 | ||
797 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
798 | spin_unlock(&timer->lock); | |
799 | if (ti->callback) | |
800 | ti->callback(ti, resolution, ticks); | |
801 | spin_lock(&timer->lock); | |
802 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
803 | } | |
804 | ||
805 | /* do we have any slow callbacks? */ | |
806 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 807 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
808 | |
809 | if (use_tasklet) | |
1f04128a | 810 | tasklet_schedule(&timer->task_queue); |
1da177e4 LT |
811 | } |
812 | ||
813 | /* | |
814 | ||
815 | */ | |
816 | ||
53d2f744 TI |
817 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
818 | struct snd_timer **rtimer) | |
1da177e4 | 819 | { |
53d2f744 | 820 | struct snd_timer *timer; |
1da177e4 | 821 | int err; |
53d2f744 | 822 | static struct snd_device_ops ops = { |
1da177e4 LT |
823 | .dev_free = snd_timer_dev_free, |
824 | .dev_register = snd_timer_dev_register, | |
c461482c | 825 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
826 | }; |
827 | ||
7eaa943c TI |
828 | if (snd_BUG_ON(!tid)) |
829 | return -EINVAL; | |
830 | if (rtimer) | |
831 | *rtimer = NULL; | |
ca2c0966 | 832 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 833 | if (!timer) |
1da177e4 LT |
834 | return -ENOMEM; |
835 | timer->tmr_class = tid->dev_class; | |
836 | timer->card = card; | |
837 | timer->tmr_device = tid->device; | |
838 | timer->tmr_subdevice = tid->subdevice; | |
839 | if (id) | |
840 | strlcpy(timer->id, id, sizeof(timer->id)); | |
6b760bb2 | 841 | timer->sticks = 1; |
1da177e4 LT |
842 | INIT_LIST_HEAD(&timer->device_list); |
843 | INIT_LIST_HEAD(&timer->open_list_head); | |
844 | INIT_LIST_HEAD(&timer->active_list_head); | |
845 | INIT_LIST_HEAD(&timer->ack_list_head); | |
846 | INIT_LIST_HEAD(&timer->sack_list_head); | |
847 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
848 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
849 | (unsigned long)timer); | |
1da177e4 | 850 | if (card != NULL) { |
de24214d | 851 | timer->module = card->module; |
6b172a85 CL |
852 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
853 | if (err < 0) { | |
1da177e4 LT |
854 | snd_timer_free(timer); |
855 | return err; | |
856 | } | |
857 | } | |
7eaa943c TI |
858 | if (rtimer) |
859 | *rtimer = timer; | |
1da177e4 LT |
860 | return 0; |
861 | } | |
862 | ||
53d2f744 | 863 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 864 | { |
7eaa943c TI |
865 | if (!timer) |
866 | return 0; | |
c461482c TI |
867 | |
868 | mutex_lock(®ister_mutex); | |
869 | if (! list_empty(&timer->open_list_head)) { | |
870 | struct list_head *p, *n; | |
871 | struct snd_timer_instance *ti; | |
cf74dcf3 | 872 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
873 | list_for_each_safe(p, n, &timer->open_list_head) { |
874 | list_del_init(p); | |
875 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
876 | ti->timer = NULL; | |
877 | } | |
878 | } | |
879 | list_del(&timer->device_list); | |
880 | mutex_unlock(®ister_mutex); | |
881 | ||
1da177e4 LT |
882 | if (timer->private_free) |
883 | timer->private_free(timer); | |
884 | kfree(timer); | |
885 | return 0; | |
886 | } | |
887 | ||
53d2f744 | 888 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 889 | { |
53d2f744 | 890 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
891 | return snd_timer_free(timer); |
892 | } | |
893 | ||
53d2f744 | 894 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 895 | { |
53d2f744 TI |
896 | struct snd_timer *timer = dev->device_data; |
897 | struct snd_timer *timer1; | |
1da177e4 | 898 | |
7eaa943c TI |
899 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
900 | return -ENXIO; | |
1da177e4 LT |
901 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
902 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
903 | return -EINVAL; | |
904 | ||
1a60d4c5 | 905 | mutex_lock(®ister_mutex); |
9244b2c3 | 906 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
907 | if (timer1->tmr_class > timer->tmr_class) |
908 | break; | |
909 | if (timer1->tmr_class < timer->tmr_class) | |
910 | continue; | |
911 | if (timer1->card && timer->card) { | |
912 | if (timer1->card->number > timer->card->number) | |
913 | break; | |
914 | if (timer1->card->number < timer->card->number) | |
915 | continue; | |
916 | } | |
917 | if (timer1->tmr_device > timer->tmr_device) | |
918 | break; | |
919 | if (timer1->tmr_device < timer->tmr_device) | |
920 | continue; | |
921 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
922 | break; | |
923 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
924 | continue; | |
925 | /* conflicts.. */ | |
1a60d4c5 | 926 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
927 | return -EBUSY; |
928 | } | |
9244b2c3 | 929 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 930 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
931 | return 0; |
932 | } | |
933 | ||
c461482c | 934 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 935 | { |
c461482c | 936 | struct snd_timer *timer = device->device_data; |
230323da TI |
937 | struct snd_timer_instance *ti; |
938 | ||
1a60d4c5 | 939 | mutex_lock(®ister_mutex); |
c461482c | 940 | list_del_init(&timer->device_list); |
230323da TI |
941 | /* wake up pending sleepers */ |
942 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
943 | if (ti->disconnect) |
944 | ti->disconnect(ti); | |
230323da | 945 | } |
1a60d4c5 | 946 | mutex_unlock(®ister_mutex); |
c461482c | 947 | return 0; |
1da177e4 LT |
948 | } |
949 | ||
53d2f744 | 950 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
951 | { |
952 | unsigned long flags; | |
953 | unsigned long resolution = 0; | |
53d2f744 | 954 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 955 | |
230323da TI |
956 | if (timer->card && timer->card->shutdown) |
957 | return; | |
7c22f1aa TI |
958 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
959 | return; | |
7eaa943c TI |
960 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
961 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
962 | return; | |
1da177e4 | 963 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
964 | if (event == SNDRV_TIMER_EVENT_MSTART || |
965 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
966 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
967 | if (timer->hw.c_resolution) |
968 | resolution = timer->hw.c_resolution(timer); | |
969 | else | |
970 | resolution = timer->hw.resolution; | |
971 | } | |
9244b2c3 | 972 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
973 | if (ti->ccallback) |
974 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 975 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
976 | if (ts->ccallback) |
977 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
978 | } |
979 | spin_unlock_irqrestore(&timer->lock, flags); | |
980 | } | |
981 | ||
982 | /* | |
983 | * exported functions for global timers | |
984 | */ | |
53d2f744 | 985 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 986 | { |
53d2f744 | 987 | struct snd_timer_id tid; |
6b172a85 | 988 | |
1da177e4 LT |
989 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
990 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
991 | tid.card = -1; | |
992 | tid.device = device; | |
993 | tid.subdevice = 0; | |
994 | return snd_timer_new(NULL, id, &tid, rtimer); | |
995 | } | |
996 | ||
53d2f744 | 997 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
998 | { |
999 | return snd_timer_free(timer); | |
1000 | } | |
1001 | ||
53d2f744 | 1002 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 1003 | { |
53d2f744 | 1004 | struct snd_device dev; |
1da177e4 LT |
1005 | |
1006 | memset(&dev, 0, sizeof(dev)); | |
1007 | dev.device_data = timer; | |
1008 | return snd_timer_dev_register(&dev); | |
1009 | } | |
1010 | ||
6b172a85 | 1011 | /* |
1da177e4 LT |
1012 | * System timer |
1013 | */ | |
1014 | ||
1015 | struct snd_timer_system_private { | |
1016 | struct timer_list tlist; | |
1da177e4 LT |
1017 | unsigned long last_expires; |
1018 | unsigned long last_jiffies; | |
1019 | unsigned long correction; | |
1020 | }; | |
1021 | ||
1da177e4 LT |
1022 | static void snd_timer_s_function(unsigned long data) |
1023 | { | |
53d2f744 | 1024 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
1025 | struct snd_timer_system_private *priv = timer->private_data; |
1026 | unsigned long jiff = jiffies; | |
1027 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1028 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1029 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1030 | } | |
1031 | ||
53d2f744 | 1032 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1033 | { |
1034 | struct snd_timer_system_private *priv; | |
1035 | unsigned long njiff; | |
1036 | ||
1037 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1038 | njiff = (priv->last_jiffies = jiffies); | |
1039 | if (priv->correction > timer->sticks - 1) { | |
1040 | priv->correction -= timer->sticks - 1; | |
1041 | njiff++; | |
1042 | } else { | |
1043 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1044 | priv->correction = 0; |
1da177e4 | 1045 | } |
4a07083e TI |
1046 | priv->last_expires = njiff; |
1047 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1048 | return 0; |
1049 | } | |
1050 | ||
53d2f744 | 1051 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1052 | { |
1053 | struct snd_timer_system_private *priv; | |
1054 | unsigned long jiff; | |
1055 | ||
1056 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1057 | del_timer(&priv->tlist); | |
1058 | jiff = jiffies; | |
1059 | if (time_before(jiff, priv->last_expires)) | |
1060 | timer->sticks = priv->last_expires - jiff; | |
1061 | else | |
1062 | timer->sticks = 1; | |
de2696d8 | 1063 | priv->correction = 0; |
1da177e4 LT |
1064 | return 0; |
1065 | } | |
1066 | ||
f146357f TI |
1067 | static int snd_timer_s_close(struct snd_timer *timer) |
1068 | { | |
1069 | struct snd_timer_system_private *priv; | |
1070 | ||
1071 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1072 | del_timer_sync(&priv->tlist); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
53d2f744 | 1076 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1077 | { |
1078 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1079 | .resolution = 1000000000L / HZ, | |
1080 | .ticks = 10000000L, | |
f146357f | 1081 | .close = snd_timer_s_close, |
1da177e4 LT |
1082 | .start = snd_timer_s_start, |
1083 | .stop = snd_timer_s_stop | |
1084 | }; | |
1085 | ||
53d2f744 | 1086 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1087 | { |
1088 | kfree(timer->private_data); | |
1089 | } | |
1090 | ||
1091 | static int snd_timer_register_system(void) | |
1092 | { | |
53d2f744 | 1093 | struct snd_timer *timer; |
1da177e4 LT |
1094 | struct snd_timer_system_private *priv; |
1095 | int err; | |
1096 | ||
6b172a85 CL |
1097 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1098 | if (err < 0) | |
1da177e4 LT |
1099 | return err; |
1100 | strcpy(timer->name, "system timer"); | |
1101 | timer->hw = snd_timer_system; | |
ca2c0966 | 1102 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1103 | if (priv == NULL) { |
1104 | snd_timer_free(timer); | |
1105 | return -ENOMEM; | |
1106 | } | |
f169c105 | 1107 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
1da177e4 LT |
1108 | timer->private_data = priv; |
1109 | timer->private_free = snd_timer_free_system; | |
1110 | return snd_timer_global_register(timer); | |
1111 | } | |
1112 | ||
cd6a6503 | 1113 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1114 | /* |
1115 | * Info interface | |
1116 | */ | |
1117 | ||
53d2f744 TI |
1118 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1119 | struct snd_info_buffer *buffer) | |
1da177e4 | 1120 | { |
53d2f744 TI |
1121 | struct snd_timer *timer; |
1122 | struct snd_timer_instance *ti; | |
1da177e4 | 1123 | |
1a60d4c5 | 1124 | mutex_lock(®ister_mutex); |
9244b2c3 | 1125 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1126 | if (timer->card && timer->card->shutdown) |
1127 | continue; | |
1da177e4 LT |
1128 | switch (timer->tmr_class) { |
1129 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1130 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1131 | break; | |
1132 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1133 | snd_iprintf(buffer, "C%i-%i: ", |
1134 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1135 | break; |
1136 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1137 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1138 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1139 | break; |
1140 | default: | |
6b172a85 CL |
1141 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1142 | timer->card ? timer->card->number : -1, | |
1143 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1144 | } |
1145 | snd_iprintf(buffer, "%s :", timer->name); | |
1146 | if (timer->hw.resolution) | |
6b172a85 CL |
1147 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1148 | timer->hw.resolution / 1000, | |
1149 | timer->hw.resolution % 1000, | |
1150 | timer->hw.ticks); | |
1da177e4 LT |
1151 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1152 | snd_iprintf(buffer, " SLAVE"); | |
1153 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1154 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1155 | snd_iprintf(buffer, " Client %s : %s\n", |
1156 | ti->owner ? ti->owner : "unknown", | |
1157 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1158 | SNDRV_TIMER_IFLG_RUNNING) | |
1159 | ? "running" : "stopped"); | |
1da177e4 | 1160 | } |
1a60d4c5 | 1161 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1162 | } |
1163 | ||
6581f4e7 | 1164 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1165 | |
1166 | static void __init snd_timer_proc_init(void) | |
1167 | { | |
1168 | struct snd_info_entry *entry; | |
1169 | ||
1170 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1171 | if (entry != NULL) { | |
e28563cc TI |
1172 | entry->c.text.read = snd_timer_proc_read; |
1173 | if (snd_info_register(entry) < 0) { | |
1174 | snd_info_free_entry(entry); | |
1175 | entry = NULL; | |
1176 | } | |
1177 | } | |
1178 | snd_timer_proc_entry = entry; | |
1179 | } | |
1180 | ||
1181 | static void __exit snd_timer_proc_done(void) | |
1182 | { | |
746d4a02 | 1183 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1184 | } |
cd6a6503 | 1185 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1186 | #define snd_timer_proc_init() |
1187 | #define snd_timer_proc_done() | |
1188 | #endif | |
1189 | ||
1da177e4 LT |
1190 | /* |
1191 | * USER SPACE interface | |
1192 | */ | |
1193 | ||
53d2f744 | 1194 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1195 | unsigned long resolution, |
1196 | unsigned long ticks) | |
1197 | { | |
53d2f744 TI |
1198 | struct snd_timer_user *tu = timeri->callback_data; |
1199 | struct snd_timer_read *r; | |
1da177e4 | 1200 | int prev; |
6b172a85 | 1201 | |
1da177e4 LT |
1202 | spin_lock(&tu->qlock); |
1203 | if (tu->qused > 0) { | |
1204 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1205 | r = &tu->queue[prev]; | |
1206 | if (r->resolution == resolution) { | |
1207 | r->ticks += ticks; | |
1208 | goto __wake; | |
1209 | } | |
1210 | } | |
1211 | if (tu->qused >= tu->queue_size) { | |
1212 | tu->overrun++; | |
1213 | } else { | |
1214 | r = &tu->queue[tu->qtail++]; | |
1215 | tu->qtail %= tu->queue_size; | |
1216 | r->resolution = resolution; | |
1217 | r->ticks = ticks; | |
1218 | tu->qused++; | |
1219 | } | |
1220 | __wake: | |
1221 | spin_unlock(&tu->qlock); | |
1222 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1223 | wake_up(&tu->qchange_sleep); | |
1224 | } | |
1225 | ||
53d2f744 TI |
1226 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1227 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1228 | { |
1229 | if (tu->qused >= tu->queue_size) { | |
1230 | tu->overrun++; | |
1231 | } else { | |
1232 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1233 | tu->qtail %= tu->queue_size; | |
1234 | tu->qused++; | |
1235 | } | |
1236 | } | |
1237 | ||
53d2f744 TI |
1238 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1239 | int event, | |
1da177e4 LT |
1240 | struct timespec *tstamp, |
1241 | unsigned long resolution) | |
1242 | { | |
53d2f744 TI |
1243 | struct snd_timer_user *tu = timeri->callback_data; |
1244 | struct snd_timer_tread r1; | |
bfe70783 | 1245 | unsigned long flags; |
1da177e4 | 1246 | |
6b172a85 CL |
1247 | if (event >= SNDRV_TIMER_EVENT_START && |
1248 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1249 | tu->tstamp = *tstamp; |
1250 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1251 | return; | |
9a47e9cf | 1252 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1253 | r1.event = event; |
1254 | r1.tstamp = *tstamp; | |
1255 | r1.val = resolution; | |
bfe70783 | 1256 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1257 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1258 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1259 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1260 | wake_up(&tu->qchange_sleep); | |
1261 | } | |
1262 | ||
40ed9444 TI |
1263 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1264 | { | |
1265 | struct snd_timer_user *tu = timeri->callback_data; | |
1266 | ||
1267 | tu->disconnected = true; | |
1268 | wake_up(&tu->qchange_sleep); | |
1269 | } | |
1270 | ||
53d2f744 | 1271 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1272 | unsigned long resolution, |
1273 | unsigned long ticks) | |
1274 | { | |
53d2f744 TI |
1275 | struct snd_timer_user *tu = timeri->callback_data; |
1276 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1277 | struct timespec tstamp; |
1278 | int prev, append = 0; | |
1279 | ||
07799e75 | 1280 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1281 | spin_lock(&tu->qlock); |
6b172a85 CL |
1282 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1283 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1284 | spin_unlock(&tu->qlock); |
1285 | return; | |
1286 | } | |
b751eef1 JK |
1287 | if (tu->last_resolution != resolution || ticks > 0) { |
1288 | if (timer_tstamp_monotonic) | |
26204e04 | 1289 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1290 | else |
1291 | getnstimeofday(&tstamp); | |
1292 | } | |
6b172a85 CL |
1293 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1294 | tu->last_resolution != resolution) { | |
e4ec8cc8 | 1295 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1296 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1297 | r1.tstamp = tstamp; | |
1298 | r1.val = resolution; | |
1299 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1300 | tu->last_resolution = resolution; | |
1301 | append++; | |
1302 | } | |
1303 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1304 | goto __wake; | |
1305 | if (ticks == 0) | |
1306 | goto __wake; | |
1307 | if (tu->qused > 0) { | |
1308 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1309 | r = &tu->tqueue[prev]; | |
1310 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1311 | r->tstamp = tstamp; | |
1312 | r->val += ticks; | |
1313 | append++; | |
1314 | goto __wake; | |
1315 | } | |
1316 | } | |
1317 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1318 | r1.tstamp = tstamp; | |
1319 | r1.val = ticks; | |
1320 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1321 | append++; | |
1322 | __wake: | |
1323 | spin_unlock(&tu->qlock); | |
1324 | if (append == 0) | |
1325 | return; | |
1326 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1327 | wake_up(&tu->qchange_sleep); | |
1328 | } | |
1329 | ||
1330 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1331 | { | |
53d2f744 | 1332 | struct snd_timer_user *tu; |
02f4865f TI |
1333 | int err; |
1334 | ||
1335 | err = nonseekable_open(inode, file); | |
1336 | if (err < 0) | |
1337 | return err; | |
6b172a85 | 1338 | |
ca2c0966 | 1339 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1340 | if (tu == NULL) |
1341 | return -ENOMEM; | |
1342 | spin_lock_init(&tu->qlock); | |
1343 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1344 | mutex_init(&tu->ioctl_lock); |
1da177e4 LT |
1345 | tu->ticks = 1; |
1346 | tu->queue_size = 128; | |
53d2f744 | 1347 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1348 | GFP_KERNEL); |
1da177e4 LT |
1349 | if (tu->queue == NULL) { |
1350 | kfree(tu); | |
1351 | return -ENOMEM; | |
1352 | } | |
1353 | file->private_data = tu; | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1358 | { | |
53d2f744 | 1359 | struct snd_timer_user *tu; |
1da177e4 LT |
1360 | |
1361 | if (file->private_data) { | |
1362 | tu = file->private_data; | |
1363 | file->private_data = NULL; | |
af368027 | 1364 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1365 | if (tu->timeri) |
1366 | snd_timer_close(tu->timeri); | |
af368027 | 1367 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1368 | kfree(tu->queue); |
1369 | kfree(tu->tqueue); | |
1370 | kfree(tu); | |
1371 | } | |
1372 | return 0; | |
1373 | } | |
1374 | ||
53d2f744 | 1375 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1376 | { |
1377 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1378 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1379 | id->card = -1; | |
1380 | id->device = -1; | |
1381 | id->subdevice = -1; | |
1382 | } | |
1383 | ||
53d2f744 | 1384 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1385 | { |
1386 | id->dev_class = timer->tmr_class; | |
1387 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1388 | id->card = timer->card ? timer->card->number : -1; | |
1389 | id->device = timer->tmr_device; | |
1390 | id->subdevice = timer->tmr_subdevice; | |
1391 | } | |
1392 | ||
53d2f744 | 1393 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1394 | { |
53d2f744 TI |
1395 | struct snd_timer_id id; |
1396 | struct snd_timer *timer; | |
1da177e4 | 1397 | struct list_head *p; |
6b172a85 | 1398 | |
1da177e4 LT |
1399 | if (copy_from_user(&id, _tid, sizeof(id))) |
1400 | return -EFAULT; | |
1a60d4c5 | 1401 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1402 | if (id.dev_class < 0) { /* first item */ |
1403 | if (list_empty(&snd_timer_list)) | |
1404 | snd_timer_user_zero_id(&id); | |
1405 | else { | |
9dfba380 | 1406 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1407 | struct snd_timer, device_list); |
1da177e4 LT |
1408 | snd_timer_user_copy_id(&id, timer); |
1409 | } | |
1410 | } else { | |
1411 | switch (id.dev_class) { | |
1412 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1413 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1414 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1415 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1416 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1417 | snd_timer_user_copy_id(&id, timer); | |
1418 | break; | |
1419 | } | |
1420 | if (timer->tmr_device >= id.device) { | |
1421 | snd_timer_user_copy_id(&id, timer); | |
1422 | break; | |
1423 | } | |
1424 | } | |
1425 | if (p == &snd_timer_list) | |
1426 | snd_timer_user_zero_id(&id); | |
1427 | break; | |
1428 | case SNDRV_TIMER_CLASS_CARD: | |
1429 | case SNDRV_TIMER_CLASS_PCM: | |
1430 | if (id.card < 0) { | |
1431 | id.card = 0; | |
1432 | } else { | |
1433 | if (id.card < 0) { | |
1434 | id.card = 0; | |
1435 | } else { | |
1436 | if (id.device < 0) { | |
1437 | id.device = 0; | |
1438 | } else { | |
6b172a85 CL |
1439 | if (id.subdevice < 0) { |
1440 | id.subdevice = 0; | |
1441 | } else { | |
1442 | id.subdevice++; | |
1443 | } | |
1da177e4 LT |
1444 | } |
1445 | } | |
1446 | } | |
1447 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1448 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1449 | if (timer->tmr_class > id.dev_class) { |
1450 | snd_timer_user_copy_id(&id, timer); | |
1451 | break; | |
1452 | } | |
1453 | if (timer->tmr_class < id.dev_class) | |
1454 | continue; | |
1455 | if (timer->card->number > id.card) { | |
1456 | snd_timer_user_copy_id(&id, timer); | |
1457 | break; | |
1458 | } | |
1459 | if (timer->card->number < id.card) | |
1460 | continue; | |
1461 | if (timer->tmr_device > id.device) { | |
1462 | snd_timer_user_copy_id(&id, timer); | |
1463 | break; | |
1464 | } | |
1465 | if (timer->tmr_device < id.device) | |
1466 | continue; | |
1467 | if (timer->tmr_subdevice > id.subdevice) { | |
1468 | snd_timer_user_copy_id(&id, timer); | |
1469 | break; | |
1470 | } | |
1471 | if (timer->tmr_subdevice < id.subdevice) | |
1472 | continue; | |
1473 | snd_timer_user_copy_id(&id, timer); | |
1474 | break; | |
1475 | } | |
1476 | if (p == &snd_timer_list) | |
1477 | snd_timer_user_zero_id(&id); | |
1478 | break; | |
1479 | default: | |
1480 | snd_timer_user_zero_id(&id); | |
1481 | } | |
1482 | } | |
1a60d4c5 | 1483 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1484 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1485 | return -EFAULT; | |
1486 | return 0; | |
6b172a85 | 1487 | } |
1da177e4 | 1488 | |
6b172a85 | 1489 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1490 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1491 | { |
53d2f744 TI |
1492 | struct snd_timer_ginfo *ginfo; |
1493 | struct snd_timer_id tid; | |
1494 | struct snd_timer *t; | |
1da177e4 LT |
1495 | struct list_head *p; |
1496 | int err = 0; | |
1497 | ||
ef44a1ec LZ |
1498 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1499 | if (IS_ERR(ginfo)) | |
1500 | return PTR_ERR(ginfo); | |
1501 | ||
1da177e4 LT |
1502 | tid = ginfo->tid; |
1503 | memset(ginfo, 0, sizeof(*ginfo)); | |
1504 | ginfo->tid = tid; | |
1a60d4c5 | 1505 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1506 | t = snd_timer_find(&tid); |
1507 | if (t != NULL) { | |
1508 | ginfo->card = t->card ? t->card->number : -1; | |
1509 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1510 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1511 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1512 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1513 | ginfo->resolution = t->hw.resolution; | |
1514 | if (t->hw.resolution_min > 0) { | |
1515 | ginfo->resolution_min = t->hw.resolution_min; | |
1516 | ginfo->resolution_max = t->hw.resolution_max; | |
1517 | } | |
1518 | list_for_each(p, &t->open_list_head) { | |
1519 | ginfo->clients++; | |
1520 | } | |
1521 | } else { | |
1522 | err = -ENODEV; | |
1523 | } | |
1a60d4c5 | 1524 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1525 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1526 | err = -EFAULT; | |
1527 | kfree(ginfo); | |
1528 | return err; | |
1529 | } | |
1530 | ||
91d2178e | 1531 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1532 | { |
53d2f744 | 1533 | struct snd_timer *t; |
1da177e4 LT |
1534 | int err; |
1535 | ||
1a60d4c5 | 1536 | mutex_lock(®ister_mutex); |
91d2178e | 1537 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1538 | if (!t) { |
1da177e4 | 1539 | err = -ENODEV; |
6b172a85 CL |
1540 | goto _error; |
1541 | } | |
1542 | if (!list_empty(&t->open_list_head)) { | |
1543 | err = -EBUSY; | |
1544 | goto _error; | |
1545 | } | |
1546 | if (!t->hw.set_period) { | |
1547 | err = -ENOSYS; | |
1548 | goto _error; | |
1da177e4 | 1549 | } |
91d2178e | 1550 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1551 | _error: |
1a60d4c5 | 1552 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1553 | return err; |
1554 | } | |
1555 | ||
91d2178e TS |
1556 | static int snd_timer_user_gparams(struct file *file, |
1557 | struct snd_timer_gparams __user *_gparams) | |
1558 | { | |
1559 | struct snd_timer_gparams gparams; | |
1560 | ||
1561 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1562 | return -EFAULT; | |
1563 | return timer_set_gparams(&gparams); | |
1564 | } | |
1565 | ||
6b172a85 | 1566 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1567 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1568 | { |
53d2f744 TI |
1569 | struct snd_timer_gstatus gstatus; |
1570 | struct snd_timer_id tid; | |
1571 | struct snd_timer *t; | |
1da177e4 LT |
1572 | int err = 0; |
1573 | ||
1574 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1575 | return -EFAULT; | |
1576 | tid = gstatus.tid; | |
1577 | memset(&gstatus, 0, sizeof(gstatus)); | |
1578 | gstatus.tid = tid; | |
1a60d4c5 | 1579 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1580 | t = snd_timer_find(&tid); |
1581 | if (t != NULL) { | |
1582 | if (t->hw.c_resolution) | |
1583 | gstatus.resolution = t->hw.c_resolution(t); | |
1584 | else | |
1585 | gstatus.resolution = t->hw.resolution; | |
1586 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1587 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1588 | &gstatus.resolution_den); | |
1da177e4 LT |
1589 | } else { |
1590 | gstatus.resolution_num = gstatus.resolution; | |
1591 | gstatus.resolution_den = 1000000000uL; | |
1592 | } | |
1593 | } else { | |
1594 | err = -ENODEV; | |
1595 | } | |
1a60d4c5 | 1596 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1597 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1598 | err = -EFAULT; | |
1599 | return err; | |
1600 | } | |
1601 | ||
6b172a85 | 1602 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1603 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1604 | { |
53d2f744 TI |
1605 | struct snd_timer_user *tu; |
1606 | struct snd_timer_select tselect; | |
1da177e4 | 1607 | char str[32]; |
c1935b4d | 1608 | int err = 0; |
6b172a85 | 1609 | |
1da177e4 | 1610 | tu = file->private_data; |
c1935b4d | 1611 | if (tu->timeri) { |
1da177e4 | 1612 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1613 | tu->timeri = NULL; |
1614 | } | |
1615 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1616 | err = -EFAULT; | |
1617 | goto __err; | |
1618 | } | |
1da177e4 LT |
1619 | sprintf(str, "application %i", current->pid); |
1620 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1621 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1622 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1623 | if (err < 0) | |
c1935b4d | 1624 | goto __err; |
1da177e4 | 1625 | |
4d572776 JJ |
1626 | kfree(tu->queue); |
1627 | tu->queue = NULL; | |
1628 | kfree(tu->tqueue); | |
1629 | tu->tqueue = NULL; | |
1da177e4 | 1630 | if (tu->tread) { |
53d2f744 | 1631 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1632 | GFP_KERNEL); |
c1935b4d JK |
1633 | if (tu->tqueue == NULL) |
1634 | err = -ENOMEM; | |
1da177e4 | 1635 | } else { |
53d2f744 | 1636 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1637 | GFP_KERNEL); |
c1935b4d JK |
1638 | if (tu->queue == NULL) |
1639 | err = -ENOMEM; | |
1da177e4 | 1640 | } |
6b172a85 | 1641 | |
c1935b4d JK |
1642 | if (err < 0) { |
1643 | snd_timer_close(tu->timeri); | |
1644 | tu->timeri = NULL; | |
1645 | } else { | |
1646 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1647 | tu->timeri->callback = tu->tread |
1648 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1649 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1650 | tu->timeri->callback_data = (void *)tu; | |
40ed9444 | 1651 | tu->timeri->disconnect = snd_timer_user_disconnect; |
c1935b4d JK |
1652 | } |
1653 | ||
1654 | __err: | |
c1935b4d | 1655 | return err; |
1da177e4 LT |
1656 | } |
1657 | ||
6b172a85 | 1658 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1659 | struct snd_timer_info __user *_info) |
1da177e4 | 1660 | { |
53d2f744 TI |
1661 | struct snd_timer_user *tu; |
1662 | struct snd_timer_info *info; | |
1663 | struct snd_timer *t; | |
1da177e4 LT |
1664 | int err = 0; |
1665 | ||
1666 | tu = file->private_data; | |
7c64ec34 CL |
1667 | if (!tu->timeri) |
1668 | return -EBADFD; | |
1da177e4 | 1669 | t = tu->timeri->timer; |
7c64ec34 CL |
1670 | if (!t) |
1671 | return -EBADFD; | |
1da177e4 | 1672 | |
ca2c0966 | 1673 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1674 | if (! info) |
1675 | return -ENOMEM; | |
1676 | info->card = t->card ? t->card->number : -1; | |
1677 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1678 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1679 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1680 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1681 | info->resolution = t->hw.resolution; | |
1682 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1683 | err = -EFAULT; | |
1684 | kfree(info); | |
1685 | return err; | |
1686 | } | |
1687 | ||
6b172a85 | 1688 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1689 | struct snd_timer_params __user *_params) |
1da177e4 | 1690 | { |
53d2f744 TI |
1691 | struct snd_timer_user *tu; |
1692 | struct snd_timer_params params; | |
1693 | struct snd_timer *t; | |
1694 | struct snd_timer_read *tr; | |
1695 | struct snd_timer_tread *ttr; | |
1da177e4 | 1696 | int err; |
6b172a85 | 1697 | |
1da177e4 | 1698 | tu = file->private_data; |
7c64ec34 CL |
1699 | if (!tu->timeri) |
1700 | return -EBADFD; | |
1da177e4 | 1701 | t = tu->timeri->timer; |
7c64ec34 CL |
1702 | if (!t) |
1703 | return -EBADFD; | |
1da177e4 LT |
1704 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1705 | return -EFAULT; | |
71321eb3 TI |
1706 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { |
1707 | u64 resolution; | |
1708 | ||
1709 | if (params.ticks < 1) { | |
1710 | err = -EINVAL; | |
1711 | goto _end; | |
1712 | } | |
1713 | ||
1714 | /* Don't allow resolution less than 1ms */ | |
1715 | resolution = snd_timer_resolution(tu->timeri); | |
1716 | resolution *= params.ticks; | |
1717 | if (resolution < 1000000) { | |
1718 | err = -EINVAL; | |
1719 | goto _end; | |
1720 | } | |
1da177e4 | 1721 | } |
6b172a85 CL |
1722 | if (params.queue_size > 0 && |
1723 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1724 | err = -EINVAL; |
1725 | goto _end; | |
1726 | } | |
1727 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1728 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1729 | (1<<SNDRV_TIMER_EVENT_START)| | |
1730 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1731 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1732 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1733 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1734 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1735 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1736 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1737 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1738 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1739 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1740 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1741 | err = -EINVAL; |
1742 | goto _end; | |
1743 | } | |
1744 | snd_timer_stop(tu->timeri); | |
1745 | spin_lock_irq(&t->lock); | |
1746 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1747 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1748 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1749 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1750 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1751 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1752 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1753 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1754 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1755 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1756 | if (params.queue_size > 0 && |
1757 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1758 | if (tu->tread) { |
6b172a85 CL |
1759 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1760 | GFP_KERNEL); | |
1da177e4 LT |
1761 | if (ttr) { |
1762 | kfree(tu->tqueue); | |
1763 | tu->queue_size = params.queue_size; | |
1764 | tu->tqueue = ttr; | |
1765 | } | |
1766 | } else { | |
6b172a85 CL |
1767 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1768 | GFP_KERNEL); | |
1da177e4 LT |
1769 | if (tr) { |
1770 | kfree(tu->queue); | |
1771 | tu->queue_size = params.queue_size; | |
1772 | tu->queue = tr; | |
1773 | } | |
1774 | } | |
1775 | } | |
1776 | tu->qhead = tu->qtail = tu->qused = 0; | |
1777 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1778 | if (tu->tread) { | |
53d2f744 | 1779 | struct snd_timer_tread tread; |
cec8f96e | 1780 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1781 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1782 | tread.tstamp.tv_sec = 0; | |
1783 | tread.tstamp.tv_nsec = 0; | |
1784 | tread.val = 0; | |
1785 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1786 | } else { | |
53d2f744 | 1787 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1788 | r->resolution = 0; |
1789 | r->ticks = 0; | |
1790 | tu->qused++; | |
1791 | tu->qtail++; | |
1792 | } | |
1da177e4 LT |
1793 | } |
1794 | tu->filter = params.filter; | |
1795 | tu->ticks = params.ticks; | |
1796 | err = 0; | |
1797 | _end: | |
1798 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1799 | return -EFAULT; | |
1800 | return err; | |
1801 | } | |
1802 | ||
6b172a85 | 1803 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1804 | struct snd_timer_status __user *_status) |
1da177e4 | 1805 | { |
53d2f744 TI |
1806 | struct snd_timer_user *tu; |
1807 | struct snd_timer_status status; | |
6b172a85 | 1808 | |
1da177e4 | 1809 | tu = file->private_data; |
7c64ec34 CL |
1810 | if (!tu->timeri) |
1811 | return -EBADFD; | |
1da177e4 LT |
1812 | memset(&status, 0, sizeof(status)); |
1813 | status.tstamp = tu->tstamp; | |
1814 | status.resolution = snd_timer_resolution(tu->timeri); | |
1815 | status.lost = tu->timeri->lost; | |
1816 | status.overrun = tu->overrun; | |
1817 | spin_lock_irq(&tu->qlock); | |
1818 | status.queue = tu->qused; | |
1819 | spin_unlock_irq(&tu->qlock); | |
1820 | if (copy_to_user(_status, &status, sizeof(status))) | |
1821 | return -EFAULT; | |
1822 | return 0; | |
1823 | } | |
1824 | ||
1825 | static int snd_timer_user_start(struct file *file) | |
1826 | { | |
1827 | int err; | |
53d2f744 | 1828 | struct snd_timer_user *tu; |
6b172a85 | 1829 | |
1da177e4 | 1830 | tu = file->private_data; |
7c64ec34 CL |
1831 | if (!tu->timeri) |
1832 | return -EBADFD; | |
1da177e4 LT |
1833 | snd_timer_stop(tu->timeri); |
1834 | tu->timeri->lost = 0; | |
1835 | tu->last_resolution = 0; | |
1836 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1837 | } | |
1838 | ||
1839 | static int snd_timer_user_stop(struct file *file) | |
1840 | { | |
1841 | int err; | |
53d2f744 | 1842 | struct snd_timer_user *tu; |
6b172a85 | 1843 | |
1da177e4 | 1844 | tu = file->private_data; |
7c64ec34 CL |
1845 | if (!tu->timeri) |
1846 | return -EBADFD; | |
1da177e4 LT |
1847 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1848 | } | |
1849 | ||
1850 | static int snd_timer_user_continue(struct file *file) | |
1851 | { | |
1852 | int err; | |
53d2f744 | 1853 | struct snd_timer_user *tu; |
6b172a85 | 1854 | |
1da177e4 | 1855 | tu = file->private_data; |
7c64ec34 CL |
1856 | if (!tu->timeri) |
1857 | return -EBADFD; | |
9f8a7658 TI |
1858 | /* start timer instead of continue if it's not used before */ |
1859 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
1860 | return snd_timer_user_start(file); | |
1da177e4 LT |
1861 | tu->timeri->lost = 0; |
1862 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1863 | } | |
1864 | ||
15790a6b TI |
1865 | static int snd_timer_user_pause(struct file *file) |
1866 | { | |
1867 | int err; | |
53d2f744 | 1868 | struct snd_timer_user *tu; |
6b172a85 | 1869 | |
15790a6b | 1870 | tu = file->private_data; |
7c64ec34 CL |
1871 | if (!tu->timeri) |
1872 | return -EBADFD; | |
d138b445 | 1873 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1874 | } |
1875 | ||
8c50b37c TI |
1876 | enum { |
1877 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1878 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1879 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1880 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1881 | }; | |
1882 | ||
af368027 | 1883 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1884 | unsigned long arg) |
1da177e4 | 1885 | { |
53d2f744 | 1886 | struct snd_timer_user *tu; |
1da177e4 LT |
1887 | void __user *argp = (void __user *)arg; |
1888 | int __user *p = argp; | |
6b172a85 | 1889 | |
1da177e4 LT |
1890 | tu = file->private_data; |
1891 | switch (cmd) { | |
1892 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1893 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1894 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1895 | return snd_timer_user_next_device(argp); | |
1896 | case SNDRV_TIMER_IOCTL_TREAD: | |
1897 | { | |
1898 | int xarg; | |
6b172a85 | 1899 | |
af368027 | 1900 | if (tu->timeri) /* too late */ |
1da177e4 | 1901 | return -EBUSY; |
af368027 | 1902 | if (get_user(xarg, p)) |
1da177e4 LT |
1903 | return -EFAULT; |
1904 | tu->tread = xarg ? 1 : 0; | |
1905 | return 0; | |
1906 | } | |
1907 | case SNDRV_TIMER_IOCTL_GINFO: | |
1908 | return snd_timer_user_ginfo(file, argp); | |
1909 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1910 | return snd_timer_user_gparams(file, argp); | |
1911 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1912 | return snd_timer_user_gstatus(file, argp); | |
1913 | case SNDRV_TIMER_IOCTL_SELECT: | |
1914 | return snd_timer_user_tselect(file, argp); | |
1915 | case SNDRV_TIMER_IOCTL_INFO: | |
1916 | return snd_timer_user_info(file, argp); | |
1917 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1918 | return snd_timer_user_params(file, argp); | |
1919 | case SNDRV_TIMER_IOCTL_STATUS: | |
1920 | return snd_timer_user_status(file, argp); | |
1921 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1922 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1923 | return snd_timer_user_start(file); |
1924 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1925 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1926 | return snd_timer_user_stop(file); |
1927 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1928 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1929 | return snd_timer_user_continue(file); |
15790a6b | 1930 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1931 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1932 | return snd_timer_user_pause(file); |
1da177e4 LT |
1933 | } |
1934 | return -ENOTTY; | |
1935 | } | |
1936 | ||
af368027 TI |
1937 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1938 | unsigned long arg) | |
1939 | { | |
1940 | struct snd_timer_user *tu = file->private_data; | |
1941 | long ret; | |
1942 | ||
1943 | mutex_lock(&tu->ioctl_lock); | |
1944 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
1945 | mutex_unlock(&tu->ioctl_lock); | |
1946 | return ret; | |
1947 | } | |
1948 | ||
1da177e4 LT |
1949 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
1950 | { | |
53d2f744 | 1951 | struct snd_timer_user *tu; |
6b172a85 | 1952 | |
1da177e4 | 1953 | tu = file->private_data; |
60aa4924 | 1954 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
1955 | } |
1956 | ||
6b172a85 CL |
1957 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1958 | size_t count, loff_t *offset) | |
1da177e4 | 1959 | { |
53d2f744 | 1960 | struct snd_timer_user *tu; |
1da177e4 | 1961 | long result = 0, unit; |
4dff5c7b | 1962 | int qhead; |
1da177e4 | 1963 | int err = 0; |
6b172a85 | 1964 | |
1da177e4 | 1965 | tu = file->private_data; |
53d2f744 | 1966 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1967 | spin_lock_irq(&tu->qlock); |
1968 | while ((long)count - result >= unit) { | |
1969 | while (!tu->qused) { | |
1970 | wait_queue_t wait; | |
1971 | ||
1972 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1973 | err = -EAGAIN; | |
4dff5c7b | 1974 | goto _error; |
1da177e4 LT |
1975 | } |
1976 | ||
1977 | set_current_state(TASK_INTERRUPTIBLE); | |
1978 | init_waitqueue_entry(&wait, current); | |
1979 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1980 | ||
1981 | spin_unlock_irq(&tu->qlock); | |
1982 | schedule(); | |
1983 | spin_lock_irq(&tu->qlock); | |
1984 | ||
1985 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1986 | ||
230323da TI |
1987 | if (tu->disconnected) { |
1988 | err = -ENODEV; | |
4dff5c7b | 1989 | goto _error; |
230323da | 1990 | } |
1da177e4 LT |
1991 | if (signal_pending(current)) { |
1992 | err = -ERESTARTSYS; | |
4dff5c7b | 1993 | goto _error; |
1da177e4 LT |
1994 | } |
1995 | } | |
1996 | ||
4dff5c7b TI |
1997 | qhead = tu->qhead++; |
1998 | tu->qhead %= tu->queue_size; | |
3fa6993f | 1999 | tu->qused--; |
1da177e4 | 2000 | spin_unlock_irq(&tu->qlock); |
1da177e4 | 2001 | |
11749e08 | 2002 | mutex_lock(&tu->ioctl_lock); |
1da177e4 | 2003 | if (tu->tread) { |
4dff5c7b TI |
2004 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
2005 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 2006 | err = -EFAULT; |
1da177e4 | 2007 | } else { |
4dff5c7b TI |
2008 | if (copy_to_user(buffer, &tu->queue[qhead], |
2009 | sizeof(struct snd_timer_read))) | |
1da177e4 | 2010 | err = -EFAULT; |
1da177e4 | 2011 | } |
11749e08 | 2012 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 | 2013 | |
1da177e4 | 2014 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
2015 | if (err < 0) |
2016 | goto _error; | |
2017 | result += unit; | |
2018 | buffer += unit; | |
1da177e4 | 2019 | } |
1da177e4 | 2020 | _error: |
4dff5c7b | 2021 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2022 | return result > 0 ? result : err; |
2023 | } | |
2024 | ||
2025 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
2026 | { | |
2027 | unsigned int mask; | |
53d2f744 | 2028 | struct snd_timer_user *tu; |
1da177e4 LT |
2029 | |
2030 | tu = file->private_data; | |
2031 | ||
2032 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 2033 | |
1da177e4 LT |
2034 | mask = 0; |
2035 | if (tu->qused) | |
2036 | mask |= POLLIN | POLLRDNORM; | |
230323da TI |
2037 | if (tu->disconnected) |
2038 | mask |= POLLERR; | |
1da177e4 LT |
2039 | |
2040 | return mask; | |
2041 | } | |
2042 | ||
2043 | #ifdef CONFIG_COMPAT | |
2044 | #include "timer_compat.c" | |
2045 | #else | |
2046 | #define snd_timer_user_ioctl_compat NULL | |
2047 | #endif | |
2048 | ||
9c2e08c5 | 2049 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2050 | { |
2051 | .owner = THIS_MODULE, | |
2052 | .read = snd_timer_user_read, | |
2053 | .open = snd_timer_user_open, | |
2054 | .release = snd_timer_user_release, | |
02f4865f | 2055 | .llseek = no_llseek, |
1da177e4 LT |
2056 | .poll = snd_timer_user_poll, |
2057 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2058 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2059 | .fasync = snd_timer_user_fasync, | |
2060 | }; | |
2061 | ||
7c35860d TI |
2062 | /* unregister the system timer */ |
2063 | static void snd_timer_free_all(void) | |
2064 | { | |
2065 | struct snd_timer *timer, *n; | |
2066 | ||
2067 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2068 | snd_timer_free(timer); | |
2069 | } | |
2070 | ||
89da061f TI |
2071 | static struct device timer_dev; |
2072 | ||
1da177e4 LT |
2073 | /* |
2074 | * ENTRY functions | |
2075 | */ | |
2076 | ||
1da177e4 LT |
2077 | static int __init alsa_timer_init(void) |
2078 | { | |
2079 | int err; | |
1da177e4 | 2080 | |
89da061f TI |
2081 | snd_device_initialize(&timer_dev, NULL); |
2082 | dev_set_name(&timer_dev, "timer"); | |
2083 | ||
1da177e4 | 2084 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2085 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2086 | "system timer"); | |
1da177e4 | 2087 | #endif |
e28563cc | 2088 | |
7c35860d TI |
2089 | err = snd_timer_register_system(); |
2090 | if (err < 0) { | |
cf74dcf3 | 2091 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
89da061f | 2092 | put_device(&timer_dev); |
7c35860d TI |
2093 | return err; |
2094 | } | |
2095 | ||
40a4b263 TI |
2096 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2097 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2098 | if (err < 0) { |
cf74dcf3 | 2099 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2100 | snd_timer_free_all(); |
89da061f | 2101 | put_device(&timer_dev); |
7c35860d TI |
2102 | return err; |
2103 | } | |
2104 | ||
e28563cc | 2105 | snd_timer_proc_init(); |
1da177e4 LT |
2106 | return 0; |
2107 | } | |
2108 | ||
2109 | static void __exit alsa_timer_exit(void) | |
2110 | { | |
40a4b263 | 2111 | snd_unregister_device(&timer_dev); |
7c35860d | 2112 | snd_timer_free_all(); |
89da061f | 2113 | put_device(&timer_dev); |
e28563cc | 2114 | snd_timer_proc_done(); |
1da177e4 LT |
2115 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2116 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2117 | #endif | |
2118 | } | |
2119 | ||
2120 | module_init(alsa_timer_init) | |
2121 | module_exit(alsa_timer_exit) | |
2122 | ||
2123 | EXPORT_SYMBOL(snd_timer_open); | |
2124 | EXPORT_SYMBOL(snd_timer_close); | |
2125 | EXPORT_SYMBOL(snd_timer_resolution); | |
2126 | EXPORT_SYMBOL(snd_timer_start); | |
2127 | EXPORT_SYMBOL(snd_timer_stop); | |
2128 | EXPORT_SYMBOL(snd_timer_continue); | |
2129 | EXPORT_SYMBOL(snd_timer_pause); | |
2130 | EXPORT_SYMBOL(snd_timer_new); | |
2131 | EXPORT_SYMBOL(snd_timer_notify); | |
2132 | EXPORT_SYMBOL(snd_timer_global_new); | |
2133 | EXPORT_SYMBOL(snd_timer_global_free); | |
2134 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 2135 | EXPORT_SYMBOL(snd_timer_interrupt); |