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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> |
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> | |
1da177e4 | 37 | |
9f8a7658 TI |
38 | /* internal flags */ |
39 | #define SNDRV_TIMER_IFLG_PAUSED 0x00010000 | |
40 | ||
8eeaa2f9 | 41 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
109fef9e | 42 | #define DEFAULT_TIMER_LIMIT 4 |
1da177e4 LT |
43 | #else |
44 | #define DEFAULT_TIMER_LIMIT 1 | |
45 | #endif | |
46 | ||
47 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 48 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 49 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
50 | MODULE_DESCRIPTION("ALSA timer interface"); |
51 | MODULE_LICENSE("GPL"); | |
52 | module_param(timer_limit, int, 0444); | |
53 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
54 | module_param(timer_tstamp_monotonic, int, 0444); |
55 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 56 | |
03cfe6f5 KS |
57 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
58 | MODULE_ALIAS("devname:snd/timer"); | |
59 | ||
53d2f744 TI |
60 | struct snd_timer_user { |
61 | struct snd_timer_instance *timeri; | |
6b172a85 | 62 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
63 | unsigned long ticks; |
64 | unsigned long overrun; | |
65 | int qhead; | |
66 | int qtail; | |
67 | int qused; | |
68 | int queue_size; | |
230323da | 69 | bool disconnected; |
53d2f744 TI |
70 | struct snd_timer_read *queue; |
71 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
72 | spinlock_t qlock; |
73 | unsigned long last_resolution; | |
74 | unsigned int filter; | |
75 | struct timespec tstamp; /* trigger tstamp */ | |
76 | wait_queue_head_t qchange_sleep; | |
77 | struct fasync_struct *fasync; | |
af368027 | 78 | struct mutex ioctl_lock; |
53d2f744 | 79 | }; |
1da177e4 LT |
80 | |
81 | /* list of timers */ | |
82 | static LIST_HEAD(snd_timer_list); | |
83 | ||
84 | /* list of slave instances */ | |
85 | static LIST_HEAD(snd_timer_slave_list); | |
86 | ||
87 | /* lock for slave active lists */ | |
88 | static DEFINE_SPINLOCK(slave_active_lock); | |
89 | ||
1a60d4c5 | 90 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 91 | |
53d2f744 TI |
92 | static int snd_timer_free(struct snd_timer *timer); |
93 | static int snd_timer_dev_free(struct snd_device *device); | |
94 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 95 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 96 | |
53d2f744 | 97 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * create a timer instance with the given owner string. | |
101 | * when timer is not NULL, increments the module counter | |
102 | */ | |
53d2f744 TI |
103 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
104 | struct snd_timer *timer) | |
1da177e4 | 105 | { |
53d2f744 | 106 | struct snd_timer_instance *timeri; |
ca2c0966 | 107 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
108 | if (timeri == NULL) |
109 | return NULL; | |
543537bd | 110 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
111 | if (! timeri->owner) { |
112 | kfree(timeri); | |
113 | return NULL; | |
114 | } | |
115 | INIT_LIST_HEAD(&timeri->open_list); | |
116 | INIT_LIST_HEAD(&timeri->active_list); | |
117 | INIT_LIST_HEAD(&timeri->ack_list); | |
118 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
119 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
120 | ||
121 | timeri->timer = timer; | |
de24214d | 122 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
123 | kfree(timeri->owner); |
124 | kfree(timeri); | |
125 | return NULL; | |
126 | } | |
127 | ||
128 | return timeri; | |
129 | } | |
130 | ||
131 | /* | |
132 | * find a timer instance from the given timer id | |
133 | */ | |
53d2f744 | 134 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 135 | { |
53d2f744 | 136 | struct snd_timer *timer = NULL; |
1da177e4 | 137 | |
9244b2c3 | 138 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
139 | if (timer->tmr_class != tid->dev_class) |
140 | continue; | |
141 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
142 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
143 | (timer->card == NULL || | |
144 | timer->card->number != tid->card)) | |
145 | continue; | |
146 | if (timer->tmr_device != tid->device) | |
147 | continue; | |
148 | if (timer->tmr_subdevice != tid->subdevice) | |
149 | continue; | |
150 | return timer; | |
151 | } | |
152 | return NULL; | |
153 | } | |
154 | ||
ee2da997 | 155 | #ifdef CONFIG_MODULES |
1da177e4 | 156 | |
53d2f744 | 157 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 158 | { |
1da177e4 LT |
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 | 182 | static 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 | |
187 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
188 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
189 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
190 | if (slave->slave_class == master->slave_class && |
191 | slave->slave_id == master->slave_id) { | |
5b7c757d NK |
192 | list_move_tail(&slave->open_list, |
193 | &master->slave_list_head); | |
1da177e4 LT |
194 | spin_lock_irq(&slave_active_lock); |
195 | slave->master = master; | |
196 | slave->timer = master->timer; | |
197 | spin_unlock_irq(&slave_active_lock); | |
198 | return; | |
199 | } | |
200 | } | |
201 | } | |
202 | } | |
203 | ||
204 | /* | |
205 | * look for slave instances matching with the slave id of the given master. | |
206 | * when found, relink the open_link of slaves. | |
207 | * | |
208 | * call this with register_mutex down. | |
209 | */ | |
53d2f744 | 210 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 211 | { |
9244b2c3 | 212 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
213 | |
214 | /* check all pending slaves */ | |
9244b2c3 | 215 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
216 | if (slave->slave_class == master->slave_class && |
217 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 218 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 | 219 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 220 | spin_lock(&master->timer->lock); |
1da177e4 LT |
221 | slave->master = master; |
222 | slave->timer = master->timer; | |
223 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
224 | list_add_tail(&slave->active_list, |
225 | &master->slave_active_head); | |
b5a663aa | 226 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
227 | spin_unlock_irq(&slave_active_lock); |
228 | } | |
229 | } | |
230 | } | |
231 | ||
232 | /* | |
233 | * open a timer instance | |
234 | * when opening a master, the slave id must be here given. | |
235 | */ | |
53d2f744 TI |
236 | int snd_timer_open(struct snd_timer_instance **ti, |
237 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
238 | unsigned int slave_id) |
239 | { | |
53d2f744 TI |
240 | struct snd_timer *timer; |
241 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 242 | |
1da177e4 LT |
243 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
244 | /* open a slave instance */ | |
245 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
246 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
247 | pr_debug("ALSA: timer: invalid slave class %i\n", |
248 | tid->dev_sclass); | |
1da177e4 LT |
249 | return -EINVAL; |
250 | } | |
1a60d4c5 | 251 | mutex_lock(®ister_mutex); |
1da177e4 | 252 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 253 | if (!timeri) { |
1a60d4c5 | 254 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
255 | return -ENOMEM; |
256 | } | |
1da177e4 LT |
257 | timeri->slave_class = tid->dev_sclass; |
258 | timeri->slave_id = tid->device; | |
259 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
260 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
261 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 262 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
263 | *ti = timeri; |
264 | return 0; | |
265 | } | |
266 | ||
267 | /* open a master instance */ | |
1a60d4c5 | 268 | mutex_lock(®ister_mutex); |
1da177e4 | 269 | timer = snd_timer_find(tid); |
ee2da997 JB |
270 | #ifdef CONFIG_MODULES |
271 | if (!timer) { | |
1a60d4c5 | 272 | mutex_unlock(®ister_mutex); |
1da177e4 | 273 | snd_timer_request(tid); |
1a60d4c5 | 274 | mutex_lock(®ister_mutex); |
1da177e4 LT |
275 | timer = snd_timer_find(tid); |
276 | } | |
277 | #endif | |
2fd43d11 | 278 | if (!timer) { |
1a60d4c5 | 279 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
280 | return -ENODEV; |
281 | } | |
2fd43d11 CL |
282 | if (!list_empty(&timer->open_list_head)) { |
283 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 284 | struct snd_timer_instance, open_list); |
2fd43d11 | 285 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 286 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
287 | return -EBUSY; |
288 | } | |
289 | } | |
290 | timeri = snd_timer_instance_new(owner, timer); | |
291 | if (!timeri) { | |
1a60d4c5 | 292 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
293 | return -ENOMEM; |
294 | } | |
230323da TI |
295 | /* take a card refcount for safe disconnection */ |
296 | if (timer->card) | |
297 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
298 | timeri->slave_class = tid->dev_sclass; |
299 | timeri->slave_id = slave_id; | |
8ddc0563 VN |
300 | |
301 | if (list_empty(&timer->open_list_head) && timer->hw.open) { | |
302 | int err = timer->hw.open(timer); | |
303 | if (err) { | |
304 | kfree(timeri->owner); | |
305 | kfree(timeri); | |
306 | ||
307 | if (timer->card) | |
308 | put_device(&timer->card->card_dev); | |
309 | module_put(timer->module); | |
310 | mutex_unlock(®ister_mutex); | |
311 | return err; | |
312 | } | |
313 | } | |
314 | ||
2fd43d11 CL |
315 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
316 | snd_timer_check_master(timeri); | |
1a60d4c5 | 317 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
318 | *ti = timeri; |
319 | return 0; | |
320 | } | |
321 | ||
1da177e4 LT |
322 | /* |
323 | * close a timer instance | |
324 | */ | |
53d2f744 | 325 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 326 | { |
53d2f744 | 327 | struct snd_timer *timer = NULL; |
9244b2c3 | 328 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 329 | |
0072889a | 330 | if (snd_BUG_ON(!timeri)) |
7eaa943c | 331 | return -ENXIO; |
1da177e4 | 332 | |
9984d1b5 TI |
333 | mutex_lock(®ister_mutex); |
334 | list_del(&timeri->open_list); | |
335 | ||
1da177e4 LT |
336 | /* force to stop the timer */ |
337 | snd_timer_stop(timeri); | |
338 | ||
9984d1b5 TI |
339 | timer = timeri->timer; |
340 | if (timer) { | |
1da177e4 LT |
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); | |
9984d1b5 | 349 | |
1da177e4 | 350 | /* remove slave links */ |
b5a663aa TI |
351 | spin_lock_irq(&slave_active_lock); |
352 | spin_lock(&timer->lock); | |
9244b2c3 JB |
353 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
354 | open_list) { | |
9244b2c3 | 355 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
356 | slave->master = NULL; |
357 | slave->timer = NULL; | |
b5a663aa TI |
358 | list_del_init(&slave->ack_list); |
359 | list_del_init(&slave->active_list); | |
1da177e4 | 360 | } |
b5a663aa TI |
361 | spin_unlock(&timer->lock); |
362 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
363 | |
364 | /* slave doesn't need to release timer resources below */ | |
365 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
366 | timer = NULL; | |
1da177e4 | 367 | } |
9984d1b5 | 368 | |
1da177e4 LT |
369 | if (timeri->private_free) |
370 | timeri->private_free(timeri); | |
371 | kfree(timeri->owner); | |
372 | kfree(timeri); | |
9984d1b5 TI |
373 | |
374 | if (timer) { | |
375 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
376 | timer->hw.close(timer); | |
377 | /* release a card refcount for safe disconnection */ | |
378 | if (timer->card) | |
379 | put_device(&timer->card->card_dev); | |
de24214d | 380 | module_put(timer->module); |
9984d1b5 TI |
381 | } |
382 | ||
383 | mutex_unlock(®ister_mutex); | |
1da177e4 LT |
384 | return 0; |
385 | } | |
386 | ||
53d2f744 | 387 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 388 | { |
53d2f744 | 389 | struct snd_timer * timer; |
1da177e4 LT |
390 | |
391 | if (timeri == NULL) | |
392 | return 0; | |
393 | if ((timer = timeri->timer) != NULL) { | |
394 | if (timer->hw.c_resolution) | |
395 | return timer->hw.c_resolution(timer); | |
396 | return timer->hw.resolution; | |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
53d2f744 | 401 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 402 | { |
53d2f744 | 403 | struct snd_timer *timer; |
1da177e4 | 404 | unsigned long resolution = 0; |
53d2f744 | 405 | struct snd_timer_instance *ts; |
1da177e4 LT |
406 | struct timespec tstamp; |
407 | ||
b751eef1 | 408 | if (timer_tstamp_monotonic) |
26204e04 | 409 | ktime_get_ts(&tstamp); |
b751eef1 JK |
410 | else |
411 | getnstimeofday(&tstamp); | |
7eaa943c TI |
412 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
413 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
414 | return; | |
6b172a85 CL |
415 | if (event == SNDRV_TIMER_EVENT_START || |
416 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
417 | resolution = snd_timer_resolution(ti); |
418 | if (ti->ccallback) | |
b30477d5 | 419 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
420 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
421 | return; | |
422 | timer = ti->timer; | |
423 | if (timer == NULL) | |
424 | return; | |
425 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
426 | return; | |
9244b2c3 | 427 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 428 | if (ts->ccallback) |
117159f0 | 429 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
430 | } |
431 | ||
f65e0d29 TI |
432 | /* start/continue a master timer */ |
433 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
434 | bool start, unsigned long ticks) | |
1da177e4 | 435 | { |
f65e0d29 TI |
436 | struct snd_timer *timer; |
437 | int result; | |
438 | unsigned long flags; | |
439 | ||
440 | timer = timeri->timer; | |
441 | if (!timer) | |
442 | return -EINVAL; | |
443 | ||
444 | spin_lock_irqsave(&timer->lock, flags); | |
445 | if (timer->card && timer->card->shutdown) { | |
446 | result = -ENODEV; | |
447 | goto unlock; | |
448 | } | |
449 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
450 | SNDRV_TIMER_IFLG_START)) { | |
451 | result = -EBUSY; | |
452 | goto unlock; | |
453 | } | |
454 | ||
455 | if (start) | |
456 | timeri->ticks = timeri->cticks = ticks; | |
457 | else if (!timeri->cticks) | |
458 | timeri->cticks = 1; | |
459 | timeri->pticks = 0; | |
460 | ||
5b7c757d | 461 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
462 | if (timer->running) { |
463 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
464 | goto __start_now; | |
465 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
466 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 467 | result = 1; /* delayed start */ |
1da177e4 | 468 | } else { |
f65e0d29 TI |
469 | if (start) |
470 | timer->sticks = ticks; | |
1da177e4 LT |
471 | timer->hw.start(timer); |
472 | __start_now: | |
473 | timer->running++; | |
474 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 475 | result = 0; |
1da177e4 | 476 | } |
f65e0d29 TI |
477 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
478 | SNDRV_TIMER_EVENT_CONTINUE); | |
479 | unlock: | |
480 | spin_unlock_irqrestore(&timer->lock, flags); | |
481 | return result; | |
1da177e4 LT |
482 | } |
483 | ||
f65e0d29 TI |
484 | /* start/continue a slave timer */ |
485 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
486 | bool start) | |
1da177e4 LT |
487 | { |
488 | unsigned long flags; | |
489 | ||
490 | spin_lock_irqsave(&slave_active_lock, flags); | |
f784beb7 TI |
491 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
492 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
493 | return -EBUSY; | |
494 | } | |
1da177e4 | 495 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
496 | if (timeri->master && timeri->timer) { |
497 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
498 | list_add_tail(&timeri->active_list, |
499 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
500 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
501 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
502 | spin_unlock(&timeri->timer->lock); |
503 | } | |
1da177e4 LT |
504 | spin_unlock_irqrestore(&slave_active_lock, flags); |
505 | return 1; /* delayed start */ | |
506 | } | |
507 | ||
f65e0d29 TI |
508 | /* stop/pause a master timer */ |
509 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 510 | { |
53d2f744 | 511 | struct snd_timer *timer; |
f65e0d29 | 512 | int result = 0; |
1da177e4 LT |
513 | unsigned long flags; |
514 | ||
1da177e4 LT |
515 | timer = timeri->timer; |
516 | if (!timer) | |
517 | return -EINVAL; | |
518 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
519 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
520 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
521 | result = -EBUSY; |
522 | goto unlock; | |
f784beb7 | 523 | } |
1da177e4 LT |
524 | list_del_init(&timeri->ack_list); |
525 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
526 | if (timer->card && timer->card->shutdown) |
527 | goto unlock; | |
528 | if (stop) { | |
529 | timeri->cticks = timeri->ticks; | |
530 | timeri->pticks = 0; | |
230323da | 531 | } |
1da177e4 LT |
532 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
533 | !(--timer->running)) { | |
534 | timer->hw.stop(timer); | |
535 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
536 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
537 | snd_timer_reschedule(timer, 0); | |
538 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
539 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
540 | timer->hw.start(timer); | |
541 | } | |
542 | } | |
543 | } | |
c3b16813 | 544 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
9f8a7658 TI |
545 | if (stop) |
546 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; | |
547 | else | |
548 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; | |
f65e0d29 TI |
549 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
550 | SNDRV_TIMER_EVENT_CONTINUE); | |
551 | unlock: | |
1da177e4 | 552 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
553 | return result; |
554 | } | |
555 | ||
556 | /* stop/pause a slave timer */ | |
557 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
558 | { | |
559 | unsigned long flags; | |
560 | ||
561 | spin_lock_irqsave(&slave_active_lock, flags); | |
562 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
563 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
564 | return -EBUSY; | |
565 | } | |
566 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
567 | if (timeri->timer) { | |
568 | spin_lock(&timeri->timer->lock); | |
569 | list_del_init(&timeri->ack_list); | |
570 | list_del_init(&timeri->active_list); | |
571 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
572 | SNDRV_TIMER_EVENT_CONTINUE); | |
573 | spin_unlock(&timeri->timer->lock); | |
574 | } | |
575 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
576 | return 0; |
577 | } | |
578 | ||
f65e0d29 TI |
579 | /* |
580 | * start the timer instance | |
581 | */ | |
582 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
583 | { | |
584 | if (timeri == NULL || ticks < 1) | |
585 | return -EINVAL; | |
586 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
587 | return snd_timer_start_slave(timeri, true); | |
588 | else | |
589 | return snd_timer_start1(timeri, true, ticks); | |
590 | } | |
591 | ||
1da177e4 LT |
592 | /* |
593 | * stop the timer instance. | |
594 | * | |
595 | * do not call this from the timer callback! | |
596 | */ | |
53d2f744 | 597 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 598 | { |
f65e0d29 TI |
599 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
600 | return snd_timer_stop_slave(timeri, true); | |
601 | else | |
602 | return snd_timer_stop1(timeri, true); | |
1da177e4 LT |
603 | } |
604 | ||
605 | /* | |
606 | * start again.. the tick is kept. | |
607 | */ | |
53d2f744 | 608 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 609 | { |
9f8a7658 TI |
610 | /* timer can continue only after pause */ |
611 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
612 | return -EINVAL; | |
613 | ||
1da177e4 | 614 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
615 | return snd_timer_start_slave(timeri, false); |
616 | else | |
617 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 LT |
618 | } |
619 | ||
620 | /* | |
621 | * pause.. remember the ticks left | |
622 | */ | |
53d2f744 | 623 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 624 | { |
f65e0d29 TI |
625 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
626 | return snd_timer_stop_slave(timeri, false); | |
627 | else | |
628 | return snd_timer_stop1(timeri, false); | |
1da177e4 LT |
629 | } |
630 | ||
631 | /* | |
632 | * reschedule the timer | |
633 | * | |
634 | * start pending instances and check the scheduling ticks. | |
635 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
636 | */ | |
53d2f744 | 637 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 638 | { |
53d2f744 | 639 | struct snd_timer_instance *ti; |
1da177e4 | 640 | unsigned long ticks = ~0UL; |
1da177e4 | 641 | |
9244b2c3 | 642 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
643 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
644 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
645 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
646 | timer->running++; | |
647 | } | |
648 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
649 | if (ticks > ti->cticks) | |
650 | ticks = ti->cticks; | |
651 | } | |
652 | } | |
653 | if (ticks == ~0UL) { | |
654 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
655 | return; | |
656 | } | |
657 | if (ticks > timer->hw.ticks) | |
658 | ticks = timer->hw.ticks; | |
659 | if (ticks_left != ticks) | |
660 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
661 | timer->sticks = ticks; | |
662 | } | |
663 | ||
664 | /* | |
665 | * timer tasklet | |
666 | * | |
667 | */ | |
668 | static void snd_timer_tasklet(unsigned long arg) | |
669 | { | |
53d2f744 TI |
670 | struct snd_timer *timer = (struct snd_timer *) arg; |
671 | struct snd_timer_instance *ti; | |
1da177e4 LT |
672 | struct list_head *p; |
673 | unsigned long resolution, ticks; | |
2999ff5b | 674 | unsigned long flags; |
1da177e4 | 675 | |
230323da TI |
676 | if (timer->card && timer->card->shutdown) |
677 | return; | |
678 | ||
2999ff5b | 679 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
680 | /* now process all callbacks */ |
681 | while (!list_empty(&timer->sack_list_head)) { | |
682 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 683 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
684 | |
685 | /* remove from ack_list and make empty */ | |
686 | list_del_init(p); | |
6b172a85 | 687 | |
1da177e4 LT |
688 | ticks = ti->pticks; |
689 | ti->pticks = 0; | |
690 | resolution = ti->resolution; | |
691 | ||
692 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
693 | spin_unlock(&timer->lock); | |
694 | if (ti->callback) | |
695 | ti->callback(ti, resolution, ticks); | |
696 | spin_lock(&timer->lock); | |
697 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
698 | } | |
2999ff5b | 699 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
700 | } |
701 | ||
702 | /* | |
703 | * timer interrupt | |
704 | * | |
705 | * ticks_left is usually equal to timer->sticks. | |
706 | * | |
707 | */ | |
53d2f744 | 708 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 709 | { |
9244b2c3 | 710 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 711 | unsigned long resolution, ticks; |
9244b2c3 | 712 | struct list_head *p, *ack_list_head; |
b32425ac | 713 | unsigned long flags; |
1da177e4 LT |
714 | int use_tasklet = 0; |
715 | ||
716 | if (timer == NULL) | |
717 | return; | |
718 | ||
230323da TI |
719 | if (timer->card && timer->card->shutdown) |
720 | return; | |
721 | ||
b32425ac | 722 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
723 | |
724 | /* remember the current resolution */ | |
725 | if (timer->hw.c_resolution) | |
726 | resolution = timer->hw.c_resolution(timer); | |
727 | else | |
728 | resolution = timer->hw.resolution; | |
729 | ||
730 | /* loop for all active instances | |
9244b2c3 | 731 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
732 | * processed instance is relinked to done_list_head before the callback |
733 | * is called. | |
1da177e4 | 734 | */ |
9244b2c3 JB |
735 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
736 | active_list) { | |
1da177e4 LT |
737 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
738 | continue; | |
739 | ti->pticks += ticks_left; | |
740 | ti->resolution = resolution; | |
741 | if (ti->cticks < ticks_left) | |
742 | ti->cticks = 0; | |
743 | else | |
744 | ti->cticks -= ticks_left; | |
745 | if (ti->cticks) /* not expired */ | |
746 | continue; | |
747 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
748 | ti->cticks = ti->ticks; | |
749 | } else { | |
750 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
751 | --timer->running; |
752 | list_del_init(&ti->active_list); | |
1da177e4 | 753 | } |
6b172a85 CL |
754 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
755 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
756 | ack_list_head = &timer->ack_list_head; | |
757 | else | |
758 | ack_list_head = &timer->sack_list_head; | |
759 | if (list_empty(&ti->ack_list)) | |
760 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 761 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
762 | ts->pticks = ti->pticks; |
763 | ts->resolution = resolution; | |
6b172a85 CL |
764 | if (list_empty(&ts->ack_list)) |
765 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
766 | } |
767 | } | |
768 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 769 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
770 | if (timer->running) { |
771 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
772 | timer->hw.stop(timer); | |
773 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
774 | } | |
775 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
776 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
777 | /* restart timer */ | |
778 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
779 | timer->hw.start(timer); | |
780 | } | |
781 | } else { | |
782 | timer->hw.stop(timer); | |
783 | } | |
784 | ||
785 | /* now process all fast callbacks */ | |
786 | while (!list_empty(&timer->ack_list_head)) { | |
787 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 788 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 789 | |
1da177e4 LT |
790 | /* remove from ack_list and make empty */ |
791 | list_del_init(p); | |
6b172a85 | 792 | |
1da177e4 LT |
793 | ticks = ti->pticks; |
794 | ti->pticks = 0; | |
795 | ||
796 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
797 | spin_unlock(&timer->lock); | |
798 | if (ti->callback) | |
799 | ti->callback(ti, resolution, ticks); | |
800 | spin_lock(&timer->lock); | |
801 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
802 | } | |
803 | ||
804 | /* do we have any slow callbacks? */ | |
805 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 806 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
807 | |
808 | if (use_tasklet) | |
1f04128a | 809 | tasklet_schedule(&timer->task_queue); |
1da177e4 LT |
810 | } |
811 | ||
812 | /* | |
813 | ||
814 | */ | |
815 | ||
53d2f744 TI |
816 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
817 | struct snd_timer **rtimer) | |
1da177e4 | 818 | { |
53d2f744 | 819 | struct snd_timer *timer; |
1da177e4 | 820 | int err; |
53d2f744 | 821 | static struct snd_device_ops ops = { |
1da177e4 LT |
822 | .dev_free = snd_timer_dev_free, |
823 | .dev_register = snd_timer_dev_register, | |
c461482c | 824 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
825 | }; |
826 | ||
7eaa943c TI |
827 | if (snd_BUG_ON(!tid)) |
828 | return -EINVAL; | |
829 | if (rtimer) | |
830 | *rtimer = NULL; | |
ca2c0966 | 831 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 832 | if (!timer) |
1da177e4 LT |
833 | return -ENOMEM; |
834 | timer->tmr_class = tid->dev_class; | |
835 | timer->card = card; | |
836 | timer->tmr_device = tid->device; | |
837 | timer->tmr_subdevice = tid->subdevice; | |
838 | if (id) | |
839 | strlcpy(timer->id, id, sizeof(timer->id)); | |
6b760bb2 | 840 | timer->sticks = 1; |
1da177e4 LT |
841 | INIT_LIST_HEAD(&timer->device_list); |
842 | INIT_LIST_HEAD(&timer->open_list_head); | |
843 | INIT_LIST_HEAD(&timer->active_list_head); | |
844 | INIT_LIST_HEAD(&timer->ack_list_head); | |
845 | INIT_LIST_HEAD(&timer->sack_list_head); | |
846 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
847 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
848 | (unsigned long)timer); | |
1da177e4 | 849 | if (card != NULL) { |
de24214d | 850 | timer->module = card->module; |
6b172a85 CL |
851 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
852 | if (err < 0) { | |
1da177e4 LT |
853 | snd_timer_free(timer); |
854 | return err; | |
855 | } | |
856 | } | |
7eaa943c TI |
857 | if (rtimer) |
858 | *rtimer = timer; | |
1da177e4 LT |
859 | return 0; |
860 | } | |
861 | ||
53d2f744 | 862 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 863 | { |
7eaa943c TI |
864 | if (!timer) |
865 | return 0; | |
c461482c TI |
866 | |
867 | mutex_lock(®ister_mutex); | |
868 | if (! list_empty(&timer->open_list_head)) { | |
869 | struct list_head *p, *n; | |
870 | struct snd_timer_instance *ti; | |
cf74dcf3 | 871 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
872 | list_for_each_safe(p, n, &timer->open_list_head) { |
873 | list_del_init(p); | |
874 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
875 | ti->timer = NULL; | |
876 | } | |
877 | } | |
878 | list_del(&timer->device_list); | |
879 | mutex_unlock(®ister_mutex); | |
880 | ||
1da177e4 LT |
881 | if (timer->private_free) |
882 | timer->private_free(timer); | |
883 | kfree(timer); | |
884 | return 0; | |
885 | } | |
886 | ||
53d2f744 | 887 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 888 | { |
53d2f744 | 889 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
890 | return snd_timer_free(timer); |
891 | } | |
892 | ||
53d2f744 | 893 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 894 | { |
53d2f744 TI |
895 | struct snd_timer *timer = dev->device_data; |
896 | struct snd_timer *timer1; | |
1da177e4 | 897 | |
7eaa943c TI |
898 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
899 | return -ENXIO; | |
1da177e4 LT |
900 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
901 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
902 | return -EINVAL; | |
903 | ||
1a60d4c5 | 904 | mutex_lock(®ister_mutex); |
9244b2c3 | 905 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
906 | if (timer1->tmr_class > timer->tmr_class) |
907 | break; | |
908 | if (timer1->tmr_class < timer->tmr_class) | |
909 | continue; | |
910 | if (timer1->card && timer->card) { | |
911 | if (timer1->card->number > timer->card->number) | |
912 | break; | |
913 | if (timer1->card->number < timer->card->number) | |
914 | continue; | |
915 | } | |
916 | if (timer1->tmr_device > timer->tmr_device) | |
917 | break; | |
918 | if (timer1->tmr_device < timer->tmr_device) | |
919 | continue; | |
920 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
921 | break; | |
922 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
923 | continue; | |
924 | /* conflicts.. */ | |
1a60d4c5 | 925 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
926 | return -EBUSY; |
927 | } | |
9244b2c3 | 928 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 929 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
930 | return 0; |
931 | } | |
932 | ||
c461482c | 933 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 934 | { |
c461482c | 935 | struct snd_timer *timer = device->device_data; |
230323da TI |
936 | struct snd_timer_instance *ti; |
937 | ||
1a60d4c5 | 938 | mutex_lock(®ister_mutex); |
c461482c | 939 | list_del_init(&timer->device_list); |
230323da TI |
940 | /* wake up pending sleepers */ |
941 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
942 | if (ti->disconnect) |
943 | ti->disconnect(ti); | |
230323da | 944 | } |
1a60d4c5 | 945 | mutex_unlock(®ister_mutex); |
c461482c | 946 | return 0; |
1da177e4 LT |
947 | } |
948 | ||
53d2f744 | 949 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
950 | { |
951 | unsigned long flags; | |
952 | unsigned long resolution = 0; | |
53d2f744 | 953 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 954 | |
230323da TI |
955 | if (timer->card && timer->card->shutdown) |
956 | return; | |
7c22f1aa TI |
957 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
958 | return; | |
7eaa943c TI |
959 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
960 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
961 | return; | |
1da177e4 | 962 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
963 | if (event == SNDRV_TIMER_EVENT_MSTART || |
964 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
965 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
966 | if (timer->hw.c_resolution) |
967 | resolution = timer->hw.c_resolution(timer); | |
968 | else | |
969 | resolution = timer->hw.resolution; | |
970 | } | |
9244b2c3 | 971 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
972 | if (ti->ccallback) |
973 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 974 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
975 | if (ts->ccallback) |
976 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
977 | } |
978 | spin_unlock_irqrestore(&timer->lock, flags); | |
979 | } | |
980 | ||
981 | /* | |
982 | * exported functions for global timers | |
983 | */ | |
53d2f744 | 984 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 985 | { |
53d2f744 | 986 | struct snd_timer_id tid; |
6b172a85 | 987 | |
1da177e4 LT |
988 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
989 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
990 | tid.card = -1; | |
991 | tid.device = device; | |
992 | tid.subdevice = 0; | |
993 | return snd_timer_new(NULL, id, &tid, rtimer); | |
994 | } | |
995 | ||
53d2f744 | 996 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
997 | { |
998 | return snd_timer_free(timer); | |
999 | } | |
1000 | ||
53d2f744 | 1001 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 1002 | { |
53d2f744 | 1003 | struct snd_device dev; |
1da177e4 LT |
1004 | |
1005 | memset(&dev, 0, sizeof(dev)); | |
1006 | dev.device_data = timer; | |
1007 | return snd_timer_dev_register(&dev); | |
1008 | } | |
1009 | ||
6b172a85 | 1010 | /* |
1da177e4 LT |
1011 | * System timer |
1012 | */ | |
1013 | ||
1014 | struct snd_timer_system_private { | |
1015 | struct timer_list tlist; | |
1da177e4 LT |
1016 | unsigned long last_expires; |
1017 | unsigned long last_jiffies; | |
1018 | unsigned long correction; | |
1019 | }; | |
1020 | ||
1da177e4 LT |
1021 | static void snd_timer_s_function(unsigned long data) |
1022 | { | |
53d2f744 | 1023 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
1024 | struct snd_timer_system_private *priv = timer->private_data; |
1025 | unsigned long jiff = jiffies; | |
1026 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1027 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1028 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1029 | } | |
1030 | ||
53d2f744 | 1031 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1032 | { |
1033 | struct snd_timer_system_private *priv; | |
1034 | unsigned long njiff; | |
1035 | ||
1036 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1037 | njiff = (priv->last_jiffies = jiffies); | |
1038 | if (priv->correction > timer->sticks - 1) { | |
1039 | priv->correction -= timer->sticks - 1; | |
1040 | njiff++; | |
1041 | } else { | |
1042 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1043 | priv->correction = 0; |
1da177e4 | 1044 | } |
4a07083e TI |
1045 | priv->last_expires = njiff; |
1046 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1047 | return 0; |
1048 | } | |
1049 | ||
53d2f744 | 1050 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1051 | { |
1052 | struct snd_timer_system_private *priv; | |
1053 | unsigned long jiff; | |
1054 | ||
1055 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1056 | del_timer(&priv->tlist); | |
1057 | jiff = jiffies; | |
1058 | if (time_before(jiff, priv->last_expires)) | |
1059 | timer->sticks = priv->last_expires - jiff; | |
1060 | else | |
1061 | timer->sticks = 1; | |
de2696d8 | 1062 | priv->correction = 0; |
1da177e4 LT |
1063 | return 0; |
1064 | } | |
1065 | ||
f146357f TI |
1066 | static int snd_timer_s_close(struct snd_timer *timer) |
1067 | { | |
1068 | struct snd_timer_system_private *priv; | |
1069 | ||
1070 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1071 | del_timer_sync(&priv->tlist); | |
1072 | return 0; | |
1073 | } | |
1074 | ||
53d2f744 | 1075 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1076 | { |
1077 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1078 | .resolution = 1000000000L / HZ, | |
1079 | .ticks = 10000000L, | |
f146357f | 1080 | .close = snd_timer_s_close, |
1da177e4 LT |
1081 | .start = snd_timer_s_start, |
1082 | .stop = snd_timer_s_stop | |
1083 | }; | |
1084 | ||
53d2f744 | 1085 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1086 | { |
1087 | kfree(timer->private_data); | |
1088 | } | |
1089 | ||
1090 | static int snd_timer_register_system(void) | |
1091 | { | |
53d2f744 | 1092 | struct snd_timer *timer; |
1da177e4 LT |
1093 | struct snd_timer_system_private *priv; |
1094 | int err; | |
1095 | ||
6b172a85 CL |
1096 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1097 | if (err < 0) | |
1da177e4 LT |
1098 | return err; |
1099 | strcpy(timer->name, "system timer"); | |
1100 | timer->hw = snd_timer_system; | |
ca2c0966 | 1101 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1102 | if (priv == NULL) { |
1103 | snd_timer_free(timer); | |
1104 | return -ENOMEM; | |
1105 | } | |
f169c105 | 1106 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
1da177e4 LT |
1107 | timer->private_data = priv; |
1108 | timer->private_free = snd_timer_free_system; | |
1109 | return snd_timer_global_register(timer); | |
1110 | } | |
1111 | ||
cd6a6503 | 1112 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1113 | /* |
1114 | * Info interface | |
1115 | */ | |
1116 | ||
53d2f744 TI |
1117 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1118 | struct snd_info_buffer *buffer) | |
1da177e4 | 1119 | { |
53d2f744 TI |
1120 | struct snd_timer *timer; |
1121 | struct snd_timer_instance *ti; | |
1da177e4 | 1122 | |
1a60d4c5 | 1123 | mutex_lock(®ister_mutex); |
9244b2c3 | 1124 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1125 | if (timer->card && timer->card->shutdown) |
1126 | continue; | |
1da177e4 LT |
1127 | switch (timer->tmr_class) { |
1128 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1129 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1130 | break; | |
1131 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1132 | snd_iprintf(buffer, "C%i-%i: ", |
1133 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1134 | break; |
1135 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1136 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1137 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1138 | break; |
1139 | default: | |
6b172a85 CL |
1140 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1141 | timer->card ? timer->card->number : -1, | |
1142 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1143 | } |
1144 | snd_iprintf(buffer, "%s :", timer->name); | |
1145 | if (timer->hw.resolution) | |
6b172a85 CL |
1146 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1147 | timer->hw.resolution / 1000, | |
1148 | timer->hw.resolution % 1000, | |
1149 | timer->hw.ticks); | |
1da177e4 LT |
1150 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1151 | snd_iprintf(buffer, " SLAVE"); | |
1152 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1153 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1154 | snd_iprintf(buffer, " Client %s : %s\n", |
1155 | ti->owner ? ti->owner : "unknown", | |
1156 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1157 | SNDRV_TIMER_IFLG_RUNNING) | |
1158 | ? "running" : "stopped"); | |
1da177e4 | 1159 | } |
1a60d4c5 | 1160 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1161 | } |
1162 | ||
6581f4e7 | 1163 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1164 | |
1165 | static void __init snd_timer_proc_init(void) | |
1166 | { | |
1167 | struct snd_info_entry *entry; | |
1168 | ||
1169 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1170 | if (entry != NULL) { | |
e28563cc TI |
1171 | entry->c.text.read = snd_timer_proc_read; |
1172 | if (snd_info_register(entry) < 0) { | |
1173 | snd_info_free_entry(entry); | |
1174 | entry = NULL; | |
1175 | } | |
1176 | } | |
1177 | snd_timer_proc_entry = entry; | |
1178 | } | |
1179 | ||
1180 | static void __exit snd_timer_proc_done(void) | |
1181 | { | |
746d4a02 | 1182 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1183 | } |
cd6a6503 | 1184 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1185 | #define snd_timer_proc_init() |
1186 | #define snd_timer_proc_done() | |
1187 | #endif | |
1188 | ||
1da177e4 LT |
1189 | /* |
1190 | * USER SPACE interface | |
1191 | */ | |
1192 | ||
53d2f744 | 1193 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1194 | unsigned long resolution, |
1195 | unsigned long ticks) | |
1196 | { | |
53d2f744 TI |
1197 | struct snd_timer_user *tu = timeri->callback_data; |
1198 | struct snd_timer_read *r; | |
1da177e4 | 1199 | int prev; |
6b172a85 | 1200 | |
1da177e4 LT |
1201 | spin_lock(&tu->qlock); |
1202 | if (tu->qused > 0) { | |
1203 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1204 | r = &tu->queue[prev]; | |
1205 | if (r->resolution == resolution) { | |
1206 | r->ticks += ticks; | |
1207 | goto __wake; | |
1208 | } | |
1209 | } | |
1210 | if (tu->qused >= tu->queue_size) { | |
1211 | tu->overrun++; | |
1212 | } else { | |
1213 | r = &tu->queue[tu->qtail++]; | |
1214 | tu->qtail %= tu->queue_size; | |
1215 | r->resolution = resolution; | |
1216 | r->ticks = ticks; | |
1217 | tu->qused++; | |
1218 | } | |
1219 | __wake: | |
1220 | spin_unlock(&tu->qlock); | |
1221 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1222 | wake_up(&tu->qchange_sleep); | |
1223 | } | |
1224 | ||
53d2f744 TI |
1225 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1226 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1227 | { |
1228 | if (tu->qused >= tu->queue_size) { | |
1229 | tu->overrun++; | |
1230 | } else { | |
1231 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1232 | tu->qtail %= tu->queue_size; | |
1233 | tu->qused++; | |
1234 | } | |
1235 | } | |
1236 | ||
53d2f744 TI |
1237 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1238 | int event, | |
1da177e4 LT |
1239 | struct timespec *tstamp, |
1240 | unsigned long resolution) | |
1241 | { | |
53d2f744 TI |
1242 | struct snd_timer_user *tu = timeri->callback_data; |
1243 | struct snd_timer_tread r1; | |
bfe70783 | 1244 | unsigned long flags; |
1da177e4 | 1245 | |
6b172a85 CL |
1246 | if (event >= SNDRV_TIMER_EVENT_START && |
1247 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1248 | tu->tstamp = *tstamp; |
1249 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1250 | return; | |
9a47e9cf | 1251 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1252 | r1.event = event; |
1253 | r1.tstamp = *tstamp; | |
1254 | r1.val = resolution; | |
bfe70783 | 1255 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1256 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1257 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1258 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1259 | wake_up(&tu->qchange_sleep); | |
1260 | } | |
1261 | ||
40ed9444 TI |
1262 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1263 | { | |
1264 | struct snd_timer_user *tu = timeri->callback_data; | |
1265 | ||
1266 | tu->disconnected = true; | |
1267 | wake_up(&tu->qchange_sleep); | |
1268 | } | |
1269 | ||
53d2f744 | 1270 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1271 | unsigned long resolution, |
1272 | unsigned long ticks) | |
1273 | { | |
53d2f744 TI |
1274 | struct snd_timer_user *tu = timeri->callback_data; |
1275 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1276 | struct timespec tstamp; |
1277 | int prev, append = 0; | |
1278 | ||
07799e75 | 1279 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1280 | spin_lock(&tu->qlock); |
6b172a85 CL |
1281 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1282 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1283 | spin_unlock(&tu->qlock); |
1284 | return; | |
1285 | } | |
b751eef1 JK |
1286 | if (tu->last_resolution != resolution || ticks > 0) { |
1287 | if (timer_tstamp_monotonic) | |
26204e04 | 1288 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1289 | else |
1290 | getnstimeofday(&tstamp); | |
1291 | } | |
6b172a85 CL |
1292 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1293 | tu->last_resolution != resolution) { | |
e4ec8cc8 | 1294 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1295 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1296 | r1.tstamp = tstamp; | |
1297 | r1.val = resolution; | |
1298 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1299 | tu->last_resolution = resolution; | |
1300 | append++; | |
1301 | } | |
1302 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1303 | goto __wake; | |
1304 | if (ticks == 0) | |
1305 | goto __wake; | |
1306 | if (tu->qused > 0) { | |
1307 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1308 | r = &tu->tqueue[prev]; | |
1309 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1310 | r->tstamp = tstamp; | |
1311 | r->val += ticks; | |
1312 | append++; | |
1313 | goto __wake; | |
1314 | } | |
1315 | } | |
1316 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1317 | r1.tstamp = tstamp; | |
1318 | r1.val = ticks; | |
1319 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1320 | append++; | |
1321 | __wake: | |
1322 | spin_unlock(&tu->qlock); | |
1323 | if (append == 0) | |
1324 | return; | |
1325 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1326 | wake_up(&tu->qchange_sleep); | |
1327 | } | |
1328 | ||
1329 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1330 | { | |
53d2f744 | 1331 | struct snd_timer_user *tu; |
02f4865f TI |
1332 | int err; |
1333 | ||
1334 | err = nonseekable_open(inode, file); | |
1335 | if (err < 0) | |
1336 | return err; | |
6b172a85 | 1337 | |
ca2c0966 | 1338 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1339 | if (tu == NULL) |
1340 | return -ENOMEM; | |
1341 | spin_lock_init(&tu->qlock); | |
1342 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1343 | mutex_init(&tu->ioctl_lock); |
1da177e4 LT |
1344 | tu->ticks = 1; |
1345 | tu->queue_size = 128; | |
53d2f744 | 1346 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1347 | GFP_KERNEL); |
1da177e4 LT |
1348 | if (tu->queue == NULL) { |
1349 | kfree(tu); | |
1350 | return -ENOMEM; | |
1351 | } | |
1352 | file->private_data = tu; | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1357 | { | |
53d2f744 | 1358 | struct snd_timer_user *tu; |
1da177e4 LT |
1359 | |
1360 | if (file->private_data) { | |
1361 | tu = file->private_data; | |
1362 | file->private_data = NULL; | |
af368027 | 1363 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1364 | if (tu->timeri) |
1365 | snd_timer_close(tu->timeri); | |
af368027 | 1366 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1367 | kfree(tu->queue); |
1368 | kfree(tu->tqueue); | |
1369 | kfree(tu); | |
1370 | } | |
1371 | return 0; | |
1372 | } | |
1373 | ||
53d2f744 | 1374 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1375 | { |
1376 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1377 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1378 | id->card = -1; | |
1379 | id->device = -1; | |
1380 | id->subdevice = -1; | |
1381 | } | |
1382 | ||
53d2f744 | 1383 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1384 | { |
1385 | id->dev_class = timer->tmr_class; | |
1386 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1387 | id->card = timer->card ? timer->card->number : -1; | |
1388 | id->device = timer->tmr_device; | |
1389 | id->subdevice = timer->tmr_subdevice; | |
1390 | } | |
1391 | ||
53d2f744 | 1392 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1393 | { |
53d2f744 TI |
1394 | struct snd_timer_id id; |
1395 | struct snd_timer *timer; | |
1da177e4 | 1396 | struct list_head *p; |
6b172a85 | 1397 | |
1da177e4 LT |
1398 | if (copy_from_user(&id, _tid, sizeof(id))) |
1399 | return -EFAULT; | |
1a60d4c5 | 1400 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1401 | if (id.dev_class < 0) { /* first item */ |
1402 | if (list_empty(&snd_timer_list)) | |
1403 | snd_timer_user_zero_id(&id); | |
1404 | else { | |
9dfba380 | 1405 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1406 | struct snd_timer, device_list); |
1da177e4 LT |
1407 | snd_timer_user_copy_id(&id, timer); |
1408 | } | |
1409 | } else { | |
1410 | switch (id.dev_class) { | |
1411 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1412 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1413 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1414 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1415 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1416 | snd_timer_user_copy_id(&id, timer); | |
1417 | break; | |
1418 | } | |
1419 | if (timer->tmr_device >= id.device) { | |
1420 | snd_timer_user_copy_id(&id, timer); | |
1421 | break; | |
1422 | } | |
1423 | } | |
1424 | if (p == &snd_timer_list) | |
1425 | snd_timer_user_zero_id(&id); | |
1426 | break; | |
1427 | case SNDRV_TIMER_CLASS_CARD: | |
1428 | case SNDRV_TIMER_CLASS_PCM: | |
1429 | if (id.card < 0) { | |
1430 | id.card = 0; | |
1431 | } else { | |
1432 | if (id.card < 0) { | |
1433 | id.card = 0; | |
1434 | } else { | |
1435 | if (id.device < 0) { | |
1436 | id.device = 0; | |
1437 | } else { | |
6b172a85 CL |
1438 | if (id.subdevice < 0) { |
1439 | id.subdevice = 0; | |
1440 | } else { | |
1441 | id.subdevice++; | |
1442 | } | |
1da177e4 LT |
1443 | } |
1444 | } | |
1445 | } | |
1446 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1447 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1448 | if (timer->tmr_class > id.dev_class) { |
1449 | snd_timer_user_copy_id(&id, timer); | |
1450 | break; | |
1451 | } | |
1452 | if (timer->tmr_class < id.dev_class) | |
1453 | continue; | |
1454 | if (timer->card->number > id.card) { | |
1455 | snd_timer_user_copy_id(&id, timer); | |
1456 | break; | |
1457 | } | |
1458 | if (timer->card->number < id.card) | |
1459 | continue; | |
1460 | if (timer->tmr_device > id.device) { | |
1461 | snd_timer_user_copy_id(&id, timer); | |
1462 | break; | |
1463 | } | |
1464 | if (timer->tmr_device < id.device) | |
1465 | continue; | |
1466 | if (timer->tmr_subdevice > id.subdevice) { | |
1467 | snd_timer_user_copy_id(&id, timer); | |
1468 | break; | |
1469 | } | |
1470 | if (timer->tmr_subdevice < id.subdevice) | |
1471 | continue; | |
1472 | snd_timer_user_copy_id(&id, timer); | |
1473 | break; | |
1474 | } | |
1475 | if (p == &snd_timer_list) | |
1476 | snd_timer_user_zero_id(&id); | |
1477 | break; | |
1478 | default: | |
1479 | snd_timer_user_zero_id(&id); | |
1480 | } | |
1481 | } | |
1a60d4c5 | 1482 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1483 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1484 | return -EFAULT; | |
1485 | return 0; | |
6b172a85 | 1486 | } |
1da177e4 | 1487 | |
6b172a85 | 1488 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1489 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1490 | { |
53d2f744 TI |
1491 | struct snd_timer_ginfo *ginfo; |
1492 | struct snd_timer_id tid; | |
1493 | struct snd_timer *t; | |
1da177e4 LT |
1494 | struct list_head *p; |
1495 | int err = 0; | |
1496 | ||
ef44a1ec LZ |
1497 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1498 | if (IS_ERR(ginfo)) | |
1499 | return PTR_ERR(ginfo); | |
1500 | ||
1da177e4 LT |
1501 | tid = ginfo->tid; |
1502 | memset(ginfo, 0, sizeof(*ginfo)); | |
1503 | ginfo->tid = tid; | |
1a60d4c5 | 1504 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1505 | t = snd_timer_find(&tid); |
1506 | if (t != NULL) { | |
1507 | ginfo->card = t->card ? t->card->number : -1; | |
1508 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1509 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1510 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1511 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1512 | ginfo->resolution = t->hw.resolution; | |
1513 | if (t->hw.resolution_min > 0) { | |
1514 | ginfo->resolution_min = t->hw.resolution_min; | |
1515 | ginfo->resolution_max = t->hw.resolution_max; | |
1516 | } | |
1517 | list_for_each(p, &t->open_list_head) { | |
1518 | ginfo->clients++; | |
1519 | } | |
1520 | } else { | |
1521 | err = -ENODEV; | |
1522 | } | |
1a60d4c5 | 1523 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1524 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1525 | err = -EFAULT; | |
1526 | kfree(ginfo); | |
1527 | return err; | |
1528 | } | |
1529 | ||
91d2178e | 1530 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1531 | { |
53d2f744 | 1532 | struct snd_timer *t; |
1da177e4 LT |
1533 | int err; |
1534 | ||
1a60d4c5 | 1535 | mutex_lock(®ister_mutex); |
91d2178e | 1536 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1537 | if (!t) { |
1da177e4 | 1538 | err = -ENODEV; |
6b172a85 CL |
1539 | goto _error; |
1540 | } | |
1541 | if (!list_empty(&t->open_list_head)) { | |
1542 | err = -EBUSY; | |
1543 | goto _error; | |
1544 | } | |
1545 | if (!t->hw.set_period) { | |
1546 | err = -ENOSYS; | |
1547 | goto _error; | |
1da177e4 | 1548 | } |
91d2178e | 1549 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1550 | _error: |
1a60d4c5 | 1551 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1552 | return err; |
1553 | } | |
1554 | ||
91d2178e TS |
1555 | static int snd_timer_user_gparams(struct file *file, |
1556 | struct snd_timer_gparams __user *_gparams) | |
1557 | { | |
1558 | struct snd_timer_gparams gparams; | |
1559 | ||
1560 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1561 | return -EFAULT; | |
1562 | return timer_set_gparams(&gparams); | |
1563 | } | |
1564 | ||
6b172a85 | 1565 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1566 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1567 | { |
53d2f744 TI |
1568 | struct snd_timer_gstatus gstatus; |
1569 | struct snd_timer_id tid; | |
1570 | struct snd_timer *t; | |
1da177e4 LT |
1571 | int err = 0; |
1572 | ||
1573 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1574 | return -EFAULT; | |
1575 | tid = gstatus.tid; | |
1576 | memset(&gstatus, 0, sizeof(gstatus)); | |
1577 | gstatus.tid = tid; | |
1a60d4c5 | 1578 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1579 | t = snd_timer_find(&tid); |
1580 | if (t != NULL) { | |
1581 | if (t->hw.c_resolution) | |
1582 | gstatus.resolution = t->hw.c_resolution(t); | |
1583 | else | |
1584 | gstatus.resolution = t->hw.resolution; | |
1585 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1586 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1587 | &gstatus.resolution_den); | |
1da177e4 LT |
1588 | } else { |
1589 | gstatus.resolution_num = gstatus.resolution; | |
1590 | gstatus.resolution_den = 1000000000uL; | |
1591 | } | |
1592 | } else { | |
1593 | err = -ENODEV; | |
1594 | } | |
1a60d4c5 | 1595 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1596 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1597 | err = -EFAULT; | |
1598 | return err; | |
1599 | } | |
1600 | ||
6b172a85 | 1601 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1602 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1603 | { |
53d2f744 TI |
1604 | struct snd_timer_user *tu; |
1605 | struct snd_timer_select tselect; | |
1da177e4 | 1606 | char str[32]; |
c1935b4d | 1607 | int err = 0; |
6b172a85 | 1608 | |
1da177e4 | 1609 | tu = file->private_data; |
c1935b4d | 1610 | if (tu->timeri) { |
1da177e4 | 1611 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1612 | tu->timeri = NULL; |
1613 | } | |
1614 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1615 | err = -EFAULT; | |
1616 | goto __err; | |
1617 | } | |
1da177e4 LT |
1618 | sprintf(str, "application %i", current->pid); |
1619 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1620 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1621 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1622 | if (err < 0) | |
c1935b4d | 1623 | goto __err; |
1da177e4 | 1624 | |
4d572776 JJ |
1625 | kfree(tu->queue); |
1626 | tu->queue = NULL; | |
1627 | kfree(tu->tqueue); | |
1628 | tu->tqueue = NULL; | |
1da177e4 | 1629 | if (tu->tread) { |
53d2f744 | 1630 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1631 | GFP_KERNEL); |
c1935b4d JK |
1632 | if (tu->tqueue == NULL) |
1633 | err = -ENOMEM; | |
1da177e4 | 1634 | } else { |
53d2f744 | 1635 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1636 | GFP_KERNEL); |
c1935b4d JK |
1637 | if (tu->queue == NULL) |
1638 | err = -ENOMEM; | |
1da177e4 | 1639 | } |
6b172a85 | 1640 | |
c1935b4d JK |
1641 | if (err < 0) { |
1642 | snd_timer_close(tu->timeri); | |
1643 | tu->timeri = NULL; | |
1644 | } else { | |
1645 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1646 | tu->timeri->callback = tu->tread |
1647 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1648 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1649 | tu->timeri->callback_data = (void *)tu; | |
40ed9444 | 1650 | tu->timeri->disconnect = snd_timer_user_disconnect; |
c1935b4d JK |
1651 | } |
1652 | ||
1653 | __err: | |
c1935b4d | 1654 | return err; |
1da177e4 LT |
1655 | } |
1656 | ||
6b172a85 | 1657 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1658 | struct snd_timer_info __user *_info) |
1da177e4 | 1659 | { |
53d2f744 TI |
1660 | struct snd_timer_user *tu; |
1661 | struct snd_timer_info *info; | |
1662 | struct snd_timer *t; | |
1da177e4 LT |
1663 | int err = 0; |
1664 | ||
1665 | tu = file->private_data; | |
7c64ec34 CL |
1666 | if (!tu->timeri) |
1667 | return -EBADFD; | |
1da177e4 | 1668 | t = tu->timeri->timer; |
7c64ec34 CL |
1669 | if (!t) |
1670 | return -EBADFD; | |
1da177e4 | 1671 | |
ca2c0966 | 1672 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1673 | if (! info) |
1674 | return -ENOMEM; | |
1675 | info->card = t->card ? t->card->number : -1; | |
1676 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1677 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1678 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1679 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1680 | info->resolution = t->hw.resolution; | |
1681 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1682 | err = -EFAULT; | |
1683 | kfree(info); | |
1684 | return err; | |
1685 | } | |
1686 | ||
6b172a85 | 1687 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1688 | struct snd_timer_params __user *_params) |
1da177e4 | 1689 | { |
53d2f744 TI |
1690 | struct snd_timer_user *tu; |
1691 | struct snd_timer_params params; | |
1692 | struct snd_timer *t; | |
1693 | struct snd_timer_read *tr; | |
1694 | struct snd_timer_tread *ttr; | |
1da177e4 | 1695 | int err; |
6b172a85 | 1696 | |
1da177e4 | 1697 | tu = file->private_data; |
7c64ec34 CL |
1698 | if (!tu->timeri) |
1699 | return -EBADFD; | |
1da177e4 | 1700 | t = tu->timeri->timer; |
7c64ec34 CL |
1701 | if (!t) |
1702 | return -EBADFD; | |
1da177e4 LT |
1703 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1704 | return -EFAULT; | |
1705 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1706 | err = -EINVAL; | |
1707 | goto _end; | |
1708 | } | |
6b172a85 CL |
1709 | if (params.queue_size > 0 && |
1710 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1711 | err = -EINVAL; |
1712 | goto _end; | |
1713 | } | |
1714 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1715 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1716 | (1<<SNDRV_TIMER_EVENT_START)| | |
1717 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1718 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1719 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1720 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1721 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1722 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1723 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1724 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1725 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1726 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1727 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1728 | err = -EINVAL; |
1729 | goto _end; | |
1730 | } | |
1731 | snd_timer_stop(tu->timeri); | |
1732 | spin_lock_irq(&t->lock); | |
1733 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1734 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1735 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1736 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1737 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1738 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1739 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1740 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1741 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1742 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1743 | if (params.queue_size > 0 && |
1744 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1745 | if (tu->tread) { |
6b172a85 CL |
1746 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1747 | GFP_KERNEL); | |
1da177e4 LT |
1748 | if (ttr) { |
1749 | kfree(tu->tqueue); | |
1750 | tu->queue_size = params.queue_size; | |
1751 | tu->tqueue = ttr; | |
1752 | } | |
1753 | } else { | |
6b172a85 CL |
1754 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1755 | GFP_KERNEL); | |
1da177e4 LT |
1756 | if (tr) { |
1757 | kfree(tu->queue); | |
1758 | tu->queue_size = params.queue_size; | |
1759 | tu->queue = tr; | |
1760 | } | |
1761 | } | |
1762 | } | |
1763 | tu->qhead = tu->qtail = tu->qused = 0; | |
1764 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1765 | if (tu->tread) { | |
53d2f744 | 1766 | struct snd_timer_tread tread; |
cec8f96e | 1767 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1768 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1769 | tread.tstamp.tv_sec = 0; | |
1770 | tread.tstamp.tv_nsec = 0; | |
1771 | tread.val = 0; | |
1772 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1773 | } else { | |
53d2f744 | 1774 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1775 | r->resolution = 0; |
1776 | r->ticks = 0; | |
1777 | tu->qused++; | |
1778 | tu->qtail++; | |
1779 | } | |
1da177e4 LT |
1780 | } |
1781 | tu->filter = params.filter; | |
1782 | tu->ticks = params.ticks; | |
1783 | err = 0; | |
1784 | _end: | |
1785 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1786 | return -EFAULT; | |
1787 | return err; | |
1788 | } | |
1789 | ||
6b172a85 | 1790 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1791 | struct snd_timer_status __user *_status) |
1da177e4 | 1792 | { |
53d2f744 TI |
1793 | struct snd_timer_user *tu; |
1794 | struct snd_timer_status status; | |
6b172a85 | 1795 | |
1da177e4 | 1796 | tu = file->private_data; |
7c64ec34 CL |
1797 | if (!tu->timeri) |
1798 | return -EBADFD; | |
1da177e4 LT |
1799 | memset(&status, 0, sizeof(status)); |
1800 | status.tstamp = tu->tstamp; | |
1801 | status.resolution = snd_timer_resolution(tu->timeri); | |
1802 | status.lost = tu->timeri->lost; | |
1803 | status.overrun = tu->overrun; | |
1804 | spin_lock_irq(&tu->qlock); | |
1805 | status.queue = tu->qused; | |
1806 | spin_unlock_irq(&tu->qlock); | |
1807 | if (copy_to_user(_status, &status, sizeof(status))) | |
1808 | return -EFAULT; | |
1809 | return 0; | |
1810 | } | |
1811 | ||
1812 | static int snd_timer_user_start(struct file *file) | |
1813 | { | |
1814 | int err; | |
53d2f744 | 1815 | struct snd_timer_user *tu; |
6b172a85 | 1816 | |
1da177e4 | 1817 | tu = file->private_data; |
7c64ec34 CL |
1818 | if (!tu->timeri) |
1819 | return -EBADFD; | |
1da177e4 LT |
1820 | snd_timer_stop(tu->timeri); |
1821 | tu->timeri->lost = 0; | |
1822 | tu->last_resolution = 0; | |
1823 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1824 | } | |
1825 | ||
1826 | static int snd_timer_user_stop(struct file *file) | |
1827 | { | |
1828 | int err; | |
53d2f744 | 1829 | struct snd_timer_user *tu; |
6b172a85 | 1830 | |
1da177e4 | 1831 | tu = file->private_data; |
7c64ec34 CL |
1832 | if (!tu->timeri) |
1833 | return -EBADFD; | |
1da177e4 LT |
1834 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1835 | } | |
1836 | ||
1837 | static int snd_timer_user_continue(struct file *file) | |
1838 | { | |
1839 | int err; | |
53d2f744 | 1840 | struct snd_timer_user *tu; |
6b172a85 | 1841 | |
1da177e4 | 1842 | tu = file->private_data; |
7c64ec34 CL |
1843 | if (!tu->timeri) |
1844 | return -EBADFD; | |
9f8a7658 TI |
1845 | /* start timer instead of continue if it's not used before */ |
1846 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
1847 | return snd_timer_user_start(file); | |
1da177e4 LT |
1848 | tu->timeri->lost = 0; |
1849 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1850 | } | |
1851 | ||
15790a6b TI |
1852 | static int snd_timer_user_pause(struct file *file) |
1853 | { | |
1854 | int err; | |
53d2f744 | 1855 | struct snd_timer_user *tu; |
6b172a85 | 1856 | |
15790a6b | 1857 | tu = file->private_data; |
7c64ec34 CL |
1858 | if (!tu->timeri) |
1859 | return -EBADFD; | |
d138b445 | 1860 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1861 | } |
1862 | ||
8c50b37c TI |
1863 | enum { |
1864 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1865 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1866 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1867 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1868 | }; | |
1869 | ||
af368027 | 1870 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1871 | unsigned long arg) |
1da177e4 | 1872 | { |
53d2f744 | 1873 | struct snd_timer_user *tu; |
1da177e4 LT |
1874 | void __user *argp = (void __user *)arg; |
1875 | int __user *p = argp; | |
6b172a85 | 1876 | |
1da177e4 LT |
1877 | tu = file->private_data; |
1878 | switch (cmd) { | |
1879 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1880 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1881 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1882 | return snd_timer_user_next_device(argp); | |
1883 | case SNDRV_TIMER_IOCTL_TREAD: | |
1884 | { | |
1885 | int xarg; | |
6b172a85 | 1886 | |
af368027 | 1887 | if (tu->timeri) /* too late */ |
1da177e4 | 1888 | return -EBUSY; |
af368027 | 1889 | if (get_user(xarg, p)) |
1da177e4 LT |
1890 | return -EFAULT; |
1891 | tu->tread = xarg ? 1 : 0; | |
1892 | return 0; | |
1893 | } | |
1894 | case SNDRV_TIMER_IOCTL_GINFO: | |
1895 | return snd_timer_user_ginfo(file, argp); | |
1896 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1897 | return snd_timer_user_gparams(file, argp); | |
1898 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1899 | return snd_timer_user_gstatus(file, argp); | |
1900 | case SNDRV_TIMER_IOCTL_SELECT: | |
1901 | return snd_timer_user_tselect(file, argp); | |
1902 | case SNDRV_TIMER_IOCTL_INFO: | |
1903 | return snd_timer_user_info(file, argp); | |
1904 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1905 | return snd_timer_user_params(file, argp); | |
1906 | case SNDRV_TIMER_IOCTL_STATUS: | |
1907 | return snd_timer_user_status(file, argp); | |
1908 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1909 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1910 | return snd_timer_user_start(file); |
1911 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1912 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1913 | return snd_timer_user_stop(file); |
1914 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1915 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1916 | return snd_timer_user_continue(file); |
15790a6b | 1917 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1918 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1919 | return snd_timer_user_pause(file); |
1da177e4 LT |
1920 | } |
1921 | return -ENOTTY; | |
1922 | } | |
1923 | ||
af368027 TI |
1924 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1925 | unsigned long arg) | |
1926 | { | |
1927 | struct snd_timer_user *tu = file->private_data; | |
1928 | long ret; | |
1929 | ||
1930 | mutex_lock(&tu->ioctl_lock); | |
1931 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
1932 | mutex_unlock(&tu->ioctl_lock); | |
1933 | return ret; | |
1934 | } | |
1935 | ||
1da177e4 LT |
1936 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
1937 | { | |
53d2f744 | 1938 | struct snd_timer_user *tu; |
6b172a85 | 1939 | |
1da177e4 | 1940 | tu = file->private_data; |
60aa4924 | 1941 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
1942 | } |
1943 | ||
6b172a85 CL |
1944 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1945 | size_t count, loff_t *offset) | |
1da177e4 | 1946 | { |
53d2f744 | 1947 | struct snd_timer_user *tu; |
1da177e4 | 1948 | long result = 0, unit; |
4dff5c7b | 1949 | int qhead; |
1da177e4 | 1950 | int err = 0; |
6b172a85 | 1951 | |
1da177e4 | 1952 | tu = file->private_data; |
53d2f744 | 1953 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1954 | spin_lock_irq(&tu->qlock); |
1955 | while ((long)count - result >= unit) { | |
1956 | while (!tu->qused) { | |
1957 | wait_queue_t wait; | |
1958 | ||
1959 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1960 | err = -EAGAIN; | |
4dff5c7b | 1961 | goto _error; |
1da177e4 LT |
1962 | } |
1963 | ||
1964 | set_current_state(TASK_INTERRUPTIBLE); | |
1965 | init_waitqueue_entry(&wait, current); | |
1966 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1967 | ||
1968 | spin_unlock_irq(&tu->qlock); | |
1969 | schedule(); | |
1970 | spin_lock_irq(&tu->qlock); | |
1971 | ||
1972 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1973 | ||
230323da TI |
1974 | if (tu->disconnected) { |
1975 | err = -ENODEV; | |
4dff5c7b | 1976 | goto _error; |
230323da | 1977 | } |
1da177e4 LT |
1978 | if (signal_pending(current)) { |
1979 | err = -ERESTARTSYS; | |
4dff5c7b | 1980 | goto _error; |
1da177e4 LT |
1981 | } |
1982 | } | |
1983 | ||
4dff5c7b TI |
1984 | qhead = tu->qhead++; |
1985 | tu->qhead %= tu->queue_size; | |
3fa6993f | 1986 | tu->qused--; |
1da177e4 | 1987 | spin_unlock_irq(&tu->qlock); |
1da177e4 | 1988 | |
11749e08 | 1989 | mutex_lock(&tu->ioctl_lock); |
1da177e4 | 1990 | if (tu->tread) { |
4dff5c7b TI |
1991 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
1992 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 1993 | err = -EFAULT; |
1da177e4 | 1994 | } else { |
4dff5c7b TI |
1995 | if (copy_to_user(buffer, &tu->queue[qhead], |
1996 | sizeof(struct snd_timer_read))) | |
1da177e4 | 1997 | err = -EFAULT; |
1da177e4 | 1998 | } |
11749e08 | 1999 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 | 2000 | |
1da177e4 | 2001 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
2002 | if (err < 0) |
2003 | goto _error; | |
2004 | result += unit; | |
2005 | buffer += unit; | |
1da177e4 | 2006 | } |
1da177e4 | 2007 | _error: |
4dff5c7b | 2008 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2009 | return result > 0 ? result : err; |
2010 | } | |
2011 | ||
2012 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
2013 | { | |
2014 | unsigned int mask; | |
53d2f744 | 2015 | struct snd_timer_user *tu; |
1da177e4 LT |
2016 | |
2017 | tu = file->private_data; | |
2018 | ||
2019 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 2020 | |
1da177e4 LT |
2021 | mask = 0; |
2022 | if (tu->qused) | |
2023 | mask |= POLLIN | POLLRDNORM; | |
230323da TI |
2024 | if (tu->disconnected) |
2025 | mask |= POLLERR; | |
1da177e4 LT |
2026 | |
2027 | return mask; | |
2028 | } | |
2029 | ||
2030 | #ifdef CONFIG_COMPAT | |
2031 | #include "timer_compat.c" | |
2032 | #else | |
2033 | #define snd_timer_user_ioctl_compat NULL | |
2034 | #endif | |
2035 | ||
9c2e08c5 | 2036 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2037 | { |
2038 | .owner = THIS_MODULE, | |
2039 | .read = snd_timer_user_read, | |
2040 | .open = snd_timer_user_open, | |
2041 | .release = snd_timer_user_release, | |
02f4865f | 2042 | .llseek = no_llseek, |
1da177e4 LT |
2043 | .poll = snd_timer_user_poll, |
2044 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2045 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2046 | .fasync = snd_timer_user_fasync, | |
2047 | }; | |
2048 | ||
7c35860d TI |
2049 | /* unregister the system timer */ |
2050 | static void snd_timer_free_all(void) | |
2051 | { | |
2052 | struct snd_timer *timer, *n; | |
2053 | ||
2054 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2055 | snd_timer_free(timer); | |
2056 | } | |
2057 | ||
89da061f TI |
2058 | static struct device timer_dev; |
2059 | ||
1da177e4 LT |
2060 | /* |
2061 | * ENTRY functions | |
2062 | */ | |
2063 | ||
1da177e4 LT |
2064 | static int __init alsa_timer_init(void) |
2065 | { | |
2066 | int err; | |
1da177e4 | 2067 | |
89da061f TI |
2068 | snd_device_initialize(&timer_dev, NULL); |
2069 | dev_set_name(&timer_dev, "timer"); | |
2070 | ||
1da177e4 | 2071 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2072 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2073 | "system timer"); | |
1da177e4 | 2074 | #endif |
e28563cc | 2075 | |
7c35860d TI |
2076 | err = snd_timer_register_system(); |
2077 | if (err < 0) { | |
cf74dcf3 | 2078 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
89da061f | 2079 | put_device(&timer_dev); |
7c35860d TI |
2080 | return err; |
2081 | } | |
2082 | ||
40a4b263 TI |
2083 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2084 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2085 | if (err < 0) { |
cf74dcf3 | 2086 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2087 | snd_timer_free_all(); |
89da061f | 2088 | put_device(&timer_dev); |
7c35860d TI |
2089 | return err; |
2090 | } | |
2091 | ||
e28563cc | 2092 | snd_timer_proc_init(); |
1da177e4 LT |
2093 | return 0; |
2094 | } | |
2095 | ||
2096 | static void __exit alsa_timer_exit(void) | |
2097 | { | |
40a4b263 | 2098 | snd_unregister_device(&timer_dev); |
7c35860d | 2099 | snd_timer_free_all(); |
89da061f | 2100 | put_device(&timer_dev); |
e28563cc | 2101 | snd_timer_proc_done(); |
1da177e4 LT |
2102 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2103 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2104 | #endif | |
2105 | } | |
2106 | ||
2107 | module_init(alsa_timer_init) | |
2108 | module_exit(alsa_timer_exit) | |
2109 | ||
2110 | EXPORT_SYMBOL(snd_timer_open); | |
2111 | EXPORT_SYMBOL(snd_timer_close); | |
2112 | EXPORT_SYMBOL(snd_timer_resolution); | |
2113 | EXPORT_SYMBOL(snd_timer_start); | |
2114 | EXPORT_SYMBOL(snd_timer_stop); | |
2115 | EXPORT_SYMBOL(snd_timer_continue); | |
2116 | EXPORT_SYMBOL(snd_timer_pause); | |
2117 | EXPORT_SYMBOL(snd_timer_new); | |
2118 | EXPORT_SYMBOL(snd_timer_notify); | |
2119 | EXPORT_SYMBOL(snd_timer_global_new); | |
2120 | EXPORT_SYMBOL(snd_timer_global_free); | |
2121 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 2122 | EXPORT_SYMBOL(snd_timer_interrupt); |