Commit | Line | Data |
---|---|---|
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 | |
8eeaa2f9 | 38 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
109fef9e | 39 | #define DEFAULT_TIMER_LIMIT 4 |
8eeaa2f9 | 40 | #elif IS_ENABLED(CONFIG_SND_RTCTIMER) |
1da177e4 LT |
41 | #define DEFAULT_TIMER_LIMIT 2 |
42 | #else | |
43 | #define DEFAULT_TIMER_LIMIT 1 | |
44 | #endif | |
45 | ||
46 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 47 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 48 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
49 | MODULE_DESCRIPTION("ALSA timer interface"); |
50 | MODULE_LICENSE("GPL"); | |
51 | module_param(timer_limit, int, 0444); | |
52 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
53 | module_param(timer_tstamp_monotonic, int, 0444); |
54 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 55 | |
03cfe6f5 KS |
56 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
57 | MODULE_ALIAS("devname:snd/timer"); | |
58 | ||
53d2f744 TI |
59 | struct snd_timer_user { |
60 | struct snd_timer_instance *timeri; | |
6b172a85 | 61 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
62 | unsigned long ticks; |
63 | unsigned long overrun; | |
64 | int qhead; | |
65 | int qtail; | |
66 | int qused; | |
67 | int queue_size; | |
53d2f744 TI |
68 | struct snd_timer_read *queue; |
69 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
70 | spinlock_t qlock; |
71 | unsigned long last_resolution; | |
72 | unsigned int filter; | |
73 | struct timespec tstamp; /* trigger tstamp */ | |
74 | wait_queue_head_t qchange_sleep; | |
75 | struct fasync_struct *fasync; | |
af368027 | 76 | struct mutex ioctl_lock; |
53d2f744 | 77 | }; |
1da177e4 LT |
78 | |
79 | /* list of timers */ | |
80 | static LIST_HEAD(snd_timer_list); | |
81 | ||
82 | /* list of slave instances */ | |
83 | static LIST_HEAD(snd_timer_slave_list); | |
84 | ||
85 | /* lock for slave active lists */ | |
86 | static DEFINE_SPINLOCK(slave_active_lock); | |
87 | ||
1a60d4c5 | 88 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 89 | |
53d2f744 TI |
90 | static int snd_timer_free(struct snd_timer *timer); |
91 | static int snd_timer_dev_free(struct snd_device *device); | |
92 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 93 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 94 | |
53d2f744 | 95 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
96 | |
97 | /* | |
98 | * create a timer instance with the given owner string. | |
99 | * when timer is not NULL, increments the module counter | |
100 | */ | |
53d2f744 TI |
101 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
102 | struct snd_timer *timer) | |
1da177e4 | 103 | { |
53d2f744 | 104 | struct snd_timer_instance *timeri; |
ca2c0966 | 105 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
106 | if (timeri == NULL) |
107 | return NULL; | |
543537bd | 108 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
109 | if (! timeri->owner) { |
110 | kfree(timeri); | |
111 | return NULL; | |
112 | } | |
113 | INIT_LIST_HEAD(&timeri->open_list); | |
114 | INIT_LIST_HEAD(&timeri->active_list); | |
115 | INIT_LIST_HEAD(&timeri->ack_list); | |
116 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
117 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
118 | ||
119 | timeri->timer = timer; | |
de24214d | 120 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
121 | kfree(timeri->owner); |
122 | kfree(timeri); | |
123 | return NULL; | |
124 | } | |
125 | ||
126 | return timeri; | |
127 | } | |
128 | ||
129 | /* | |
130 | * find a timer instance from the given timer id | |
131 | */ | |
53d2f744 | 132 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 133 | { |
53d2f744 | 134 | struct snd_timer *timer = NULL; |
1da177e4 | 135 | |
9244b2c3 | 136 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
137 | if (timer->tmr_class != tid->dev_class) |
138 | continue; | |
139 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
140 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
141 | (timer->card == NULL || | |
142 | timer->card->number != tid->card)) | |
143 | continue; | |
144 | if (timer->tmr_device != tid->device) | |
145 | continue; | |
146 | if (timer->tmr_subdevice != tid->subdevice) | |
147 | continue; | |
148 | return timer; | |
149 | } | |
150 | return NULL; | |
151 | } | |
152 | ||
ee2da997 | 153 | #ifdef CONFIG_MODULES |
1da177e4 | 154 | |
53d2f744 | 155 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 156 | { |
1da177e4 LT |
157 | switch (tid->dev_class) { |
158 | case SNDRV_TIMER_CLASS_GLOBAL: | |
159 | if (tid->device < timer_limit) | |
160 | request_module("snd-timer-%i", tid->device); | |
161 | break; | |
162 | case SNDRV_TIMER_CLASS_CARD: | |
163 | case SNDRV_TIMER_CLASS_PCM: | |
164 | if (tid->card < snd_ecards_limit) | |
165 | request_module("snd-card-%i", tid->card); | |
166 | break; | |
167 | default: | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
172 | #endif | |
173 | ||
174 | /* | |
175 | * look for a master instance matching with the slave id of the given slave. | |
176 | * when found, relink the open_link of the slave. | |
177 | * | |
178 | * call this with register_mutex down. | |
179 | */ | |
53d2f744 | 180 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 181 | { |
53d2f744 TI |
182 | struct snd_timer *timer; |
183 | struct snd_timer_instance *master; | |
1da177e4 LT |
184 | |
185 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
186 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
187 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
188 | if (slave->slave_class == master->slave_class && |
189 | slave->slave_id == master->slave_id) { | |
5b7c757d NK |
190 | list_move_tail(&slave->open_list, |
191 | &master->slave_list_head); | |
1da177e4 LT |
192 | spin_lock_irq(&slave_active_lock); |
193 | slave->master = master; | |
194 | slave->timer = master->timer; | |
195 | spin_unlock_irq(&slave_active_lock); | |
196 | return; | |
197 | } | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | /* | |
203 | * look for slave instances matching with the slave id of the given master. | |
204 | * when found, relink the open_link of slaves. | |
205 | * | |
206 | * call this with register_mutex down. | |
207 | */ | |
53d2f744 | 208 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 209 | { |
9244b2c3 | 210 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
211 | |
212 | /* check all pending slaves */ | |
9244b2c3 | 213 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
214 | if (slave->slave_class == master->slave_class && |
215 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 216 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 | 217 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 218 | spin_lock(&master->timer->lock); |
1da177e4 LT |
219 | slave->master = master; |
220 | slave->timer = master->timer; | |
221 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
222 | list_add_tail(&slave->active_list, |
223 | &master->slave_active_head); | |
b5a663aa | 224 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
225 | spin_unlock_irq(&slave_active_lock); |
226 | } | |
227 | } | |
228 | } | |
229 | ||
230 | /* | |
231 | * open a timer instance | |
232 | * when opening a master, the slave id must be here given. | |
233 | */ | |
53d2f744 TI |
234 | int snd_timer_open(struct snd_timer_instance **ti, |
235 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
236 | unsigned int slave_id) |
237 | { | |
53d2f744 TI |
238 | struct snd_timer *timer; |
239 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 240 | |
1da177e4 LT |
241 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
242 | /* open a slave instance */ | |
243 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
244 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
245 | pr_debug("ALSA: timer: invalid slave class %i\n", |
246 | tid->dev_sclass); | |
1da177e4 LT |
247 | return -EINVAL; |
248 | } | |
1a60d4c5 | 249 | mutex_lock(®ister_mutex); |
1da177e4 | 250 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 251 | if (!timeri) { |
1a60d4c5 | 252 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
253 | return -ENOMEM; |
254 | } | |
1da177e4 LT |
255 | timeri->slave_class = tid->dev_sclass; |
256 | timeri->slave_id = tid->device; | |
257 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
258 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
259 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 260 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
261 | *ti = timeri; |
262 | return 0; | |
263 | } | |
264 | ||
265 | /* open a master instance */ | |
1a60d4c5 | 266 | mutex_lock(®ister_mutex); |
1da177e4 | 267 | timer = snd_timer_find(tid); |
ee2da997 JB |
268 | #ifdef CONFIG_MODULES |
269 | if (!timer) { | |
1a60d4c5 | 270 | mutex_unlock(®ister_mutex); |
1da177e4 | 271 | snd_timer_request(tid); |
1a60d4c5 | 272 | mutex_lock(®ister_mutex); |
1da177e4 LT |
273 | timer = snd_timer_find(tid); |
274 | } | |
275 | #endif | |
2fd43d11 | 276 | if (!timer) { |
1a60d4c5 | 277 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
278 | return -ENODEV; |
279 | } | |
2fd43d11 CL |
280 | if (!list_empty(&timer->open_list_head)) { |
281 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 282 | struct snd_timer_instance, open_list); |
2fd43d11 | 283 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 284 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
285 | return -EBUSY; |
286 | } | |
287 | } | |
288 | timeri = snd_timer_instance_new(owner, timer); | |
289 | if (!timeri) { | |
1a60d4c5 | 290 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
291 | return -ENOMEM; |
292 | } | |
293 | timeri->slave_class = tid->dev_sclass; | |
294 | timeri->slave_id = slave_id; | |
295 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
296 | timer->hw.open(timer); | |
297 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
298 | snd_timer_check_master(timeri); | |
1a60d4c5 | 299 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
300 | *ti = timeri; |
301 | return 0; | |
302 | } | |
303 | ||
c3b16813 | 304 | static int _snd_timer_stop(struct snd_timer_instance *timeri, int event); |
1da177e4 LT |
305 | |
306 | /* | |
307 | * close a timer instance | |
308 | */ | |
53d2f744 | 309 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 310 | { |
53d2f744 | 311 | struct snd_timer *timer = NULL; |
9244b2c3 | 312 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 313 | |
0072889a | 314 | if (snd_BUG_ON(!timeri)) |
7eaa943c | 315 | return -ENXIO; |
1da177e4 LT |
316 | |
317 | /* force to stop the timer */ | |
318 | snd_timer_stop(timeri); | |
319 | ||
320 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
321 | /* wait, until the active callback is finished */ | |
322 | spin_lock_irq(&slave_active_lock); | |
323 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
324 | spin_unlock_irq(&slave_active_lock); | |
325 | udelay(10); | |
326 | spin_lock_irq(&slave_active_lock); | |
327 | } | |
328 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 329 | mutex_lock(®ister_mutex); |
1da177e4 | 330 | list_del(&timeri->open_list); |
1a60d4c5 | 331 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
332 | } else { |
333 | timer = timeri->timer; | |
94094c8a TI |
334 | if (snd_BUG_ON(!timer)) |
335 | goto out; | |
1da177e4 LT |
336 | /* wait, until the active callback is finished */ |
337 | spin_lock_irq(&timer->lock); | |
338 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
339 | spin_unlock_irq(&timer->lock); | |
340 | udelay(10); | |
341 | spin_lock_irq(&timer->lock); | |
342 | } | |
343 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 344 | mutex_lock(®ister_mutex); |
1da177e4 | 345 | list_del(&timeri->open_list); |
c3b16813 | 346 | if (list_empty(&timer->open_list_head) && |
6b172a85 | 347 | timer->hw.close) |
1da177e4 LT |
348 | timer->hw.close(timer); |
349 | /* remove slave links */ | |
b5a663aa TI |
350 | spin_lock_irq(&slave_active_lock); |
351 | spin_lock(&timer->lock); | |
9244b2c3 JB |
352 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
353 | open_list) { | |
9244b2c3 | 354 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
355 | slave->master = NULL; |
356 | slave->timer = NULL; | |
b5a663aa TI |
357 | list_del_init(&slave->ack_list); |
358 | list_del_init(&slave->active_list); | |
1da177e4 | 359 | } |
b5a663aa TI |
360 | spin_unlock(&timer->lock); |
361 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 362 | mutex_unlock(®ister_mutex); |
1da177e4 | 363 | } |
94094c8a | 364 | out: |
1da177e4 LT |
365 | if (timeri->private_free) |
366 | timeri->private_free(timeri); | |
367 | kfree(timeri->owner); | |
368 | kfree(timeri); | |
de24214d CL |
369 | if (timer) |
370 | module_put(timer->module); | |
1da177e4 LT |
371 | return 0; |
372 | } | |
373 | ||
53d2f744 | 374 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 375 | { |
53d2f744 | 376 | struct snd_timer * timer; |
1da177e4 LT |
377 | |
378 | if (timeri == NULL) | |
379 | return 0; | |
380 | if ((timer = timeri->timer) != NULL) { | |
381 | if (timer->hw.c_resolution) | |
382 | return timer->hw.c_resolution(timer); | |
383 | return timer->hw.resolution; | |
384 | } | |
385 | return 0; | |
386 | } | |
387 | ||
53d2f744 | 388 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 389 | { |
53d2f744 | 390 | struct snd_timer *timer; |
1da177e4 LT |
391 | unsigned long flags; |
392 | unsigned long resolution = 0; | |
53d2f744 | 393 | struct snd_timer_instance *ts; |
1da177e4 LT |
394 | struct timespec tstamp; |
395 | ||
b751eef1 | 396 | if (timer_tstamp_monotonic) |
26204e04 | 397 | ktime_get_ts(&tstamp); |
b751eef1 JK |
398 | else |
399 | getnstimeofday(&tstamp); | |
7eaa943c TI |
400 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
401 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
402 | return; | |
6b172a85 CL |
403 | if (event == SNDRV_TIMER_EVENT_START || |
404 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
405 | resolution = snd_timer_resolution(ti); |
406 | if (ti->ccallback) | |
b30477d5 | 407 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
408 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
409 | return; | |
410 | timer = ti->timer; | |
411 | if (timer == NULL) | |
412 | return; | |
413 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
414 | return; | |
415 | spin_lock_irqsave(&timer->lock, flags); | |
9244b2c3 | 416 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
417 | if (ts->ccallback) |
418 | ts->ccallback(ti, event + 100, &tstamp, resolution); | |
1da177e4 LT |
419 | spin_unlock_irqrestore(&timer->lock, flags); |
420 | } | |
421 | ||
53d2f744 | 422 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
6b172a85 | 423 | unsigned long sticks) |
1da177e4 | 424 | { |
5b7c757d | 425 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
426 | if (timer->running) { |
427 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
428 | goto __start_now; | |
429 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
430 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
431 | return 1; /* delayed start */ | |
432 | } else { | |
433 | timer->sticks = sticks; | |
434 | timer->hw.start(timer); | |
435 | __start_now: | |
436 | timer->running++; | |
437 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
438 | return 0; | |
439 | } | |
440 | } | |
441 | ||
53d2f744 | 442 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
1da177e4 LT |
443 | { |
444 | unsigned long flags; | |
445 | ||
446 | spin_lock_irqsave(&slave_active_lock, flags); | |
447 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
b5a663aa TI |
448 | if (timeri->master && timeri->timer) { |
449 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
450 | list_add_tail(&timeri->active_list, |
451 | &timeri->master->slave_active_head); | |
b5a663aa TI |
452 | spin_unlock(&timeri->timer->lock); |
453 | } | |
1da177e4 LT |
454 | spin_unlock_irqrestore(&slave_active_lock, flags); |
455 | return 1; /* delayed start */ | |
456 | } | |
457 | ||
458 | /* | |
459 | * start the timer instance | |
6b172a85 | 460 | */ |
53d2f744 | 461 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
1da177e4 | 462 | { |
53d2f744 | 463 | struct snd_timer *timer; |
1da177e4 LT |
464 | int result = -EINVAL; |
465 | unsigned long flags; | |
466 | ||
467 | if (timeri == NULL || ticks < 1) | |
468 | return -EINVAL; | |
469 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
470 | result = snd_timer_start_slave(timeri); | |
471 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
472 | return result; | |
473 | } | |
474 | timer = timeri->timer; | |
475 | if (timer == NULL) | |
476 | return -EINVAL; | |
477 | spin_lock_irqsave(&timer->lock, flags); | |
478 | timeri->ticks = timeri->cticks = ticks; | |
479 | timeri->pticks = 0; | |
480 | result = snd_timer_start1(timer, timeri, ticks); | |
481 | spin_unlock_irqrestore(&timer->lock, flags); | |
482 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
483 | return result; | |
484 | } | |
485 | ||
c3b16813 | 486 | static int _snd_timer_stop(struct snd_timer_instance *timeri, int event) |
1da177e4 | 487 | { |
53d2f744 | 488 | struct snd_timer *timer; |
1da177e4 LT |
489 | unsigned long flags; |
490 | ||
7eaa943c TI |
491 | if (snd_BUG_ON(!timeri)) |
492 | return -ENXIO; | |
1da177e4 LT |
493 | |
494 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
c3b16813 TI |
495 | spin_lock_irqsave(&slave_active_lock, flags); |
496 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
497 | list_del_init(&timeri->ack_list); | |
498 | list_del_init(&timeri->active_list); | |
499 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
500 | goto __end; |
501 | } | |
502 | timer = timeri->timer; | |
503 | if (!timer) | |
504 | return -EINVAL; | |
505 | spin_lock_irqsave(&timer->lock, flags); | |
506 | list_del_init(&timeri->ack_list); | |
507 | list_del_init(&timeri->active_list); | |
508 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
509 | !(--timer->running)) { | |
510 | timer->hw.stop(timer); | |
511 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
512 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
513 | snd_timer_reschedule(timer, 0); | |
514 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
515 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
516 | timer->hw.start(timer); | |
517 | } | |
518 | } | |
519 | } | |
c3b16813 | 520 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
1da177e4 LT |
521 | spin_unlock_irqrestore(&timer->lock, flags); |
522 | __end: | |
523 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
524 | snd_timer_notify1(timeri, event); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | /* | |
529 | * stop the timer instance. | |
530 | * | |
531 | * do not call this from the timer callback! | |
532 | */ | |
53d2f744 | 533 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 534 | { |
53d2f744 | 535 | struct snd_timer *timer; |
1da177e4 LT |
536 | unsigned long flags; |
537 | int err; | |
538 | ||
c3b16813 | 539 | err = _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_STOP); |
1da177e4 LT |
540 | if (err < 0) |
541 | return err; | |
542 | timer = timeri->timer; | |
0584ffa5 TI |
543 | if (!timer) |
544 | return -EINVAL; | |
1da177e4 LT |
545 | spin_lock_irqsave(&timer->lock, flags); |
546 | timeri->cticks = timeri->ticks; | |
547 | timeri->pticks = 0; | |
548 | spin_unlock_irqrestore(&timer->lock, flags); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | /* | |
553 | * start again.. the tick is kept. | |
554 | */ | |
53d2f744 | 555 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 556 | { |
53d2f744 | 557 | struct snd_timer *timer; |
1da177e4 LT |
558 | int result = -EINVAL; |
559 | unsigned long flags; | |
560 | ||
561 | if (timeri == NULL) | |
562 | return result; | |
563 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
564 | return snd_timer_start_slave(timeri); | |
565 | timer = timeri->timer; | |
566 | if (! timer) | |
567 | return -EINVAL; | |
568 | spin_lock_irqsave(&timer->lock, flags); | |
569 | if (!timeri->cticks) | |
570 | timeri->cticks = 1; | |
571 | timeri->pticks = 0; | |
572 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
573 | spin_unlock_irqrestore(&timer->lock, flags); | |
574 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
575 | return result; | |
576 | } | |
577 | ||
578 | /* | |
579 | * pause.. remember the ticks left | |
580 | */ | |
53d2f744 | 581 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 582 | { |
c3b16813 | 583 | return _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_PAUSE); |
1da177e4 LT |
584 | } |
585 | ||
586 | /* | |
587 | * reschedule the timer | |
588 | * | |
589 | * start pending instances and check the scheduling ticks. | |
590 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
591 | */ | |
53d2f744 | 592 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 593 | { |
53d2f744 | 594 | struct snd_timer_instance *ti; |
1da177e4 | 595 | unsigned long ticks = ~0UL; |
1da177e4 | 596 | |
9244b2c3 | 597 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
598 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
599 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
600 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
601 | timer->running++; | |
602 | } | |
603 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
604 | if (ticks > ti->cticks) | |
605 | ticks = ti->cticks; | |
606 | } | |
607 | } | |
608 | if (ticks == ~0UL) { | |
609 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
610 | return; | |
611 | } | |
612 | if (ticks > timer->hw.ticks) | |
613 | ticks = timer->hw.ticks; | |
614 | if (ticks_left != ticks) | |
615 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
616 | timer->sticks = ticks; | |
617 | } | |
618 | ||
619 | /* | |
620 | * timer tasklet | |
621 | * | |
622 | */ | |
623 | static void snd_timer_tasklet(unsigned long arg) | |
624 | { | |
53d2f744 TI |
625 | struct snd_timer *timer = (struct snd_timer *) arg; |
626 | struct snd_timer_instance *ti; | |
1da177e4 LT |
627 | struct list_head *p; |
628 | unsigned long resolution, ticks; | |
2999ff5b | 629 | unsigned long flags; |
1da177e4 | 630 | |
2999ff5b | 631 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
632 | /* now process all callbacks */ |
633 | while (!list_empty(&timer->sack_list_head)) { | |
634 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 635 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
636 | |
637 | /* remove from ack_list and make empty */ | |
638 | list_del_init(p); | |
6b172a85 | 639 | |
1da177e4 LT |
640 | ticks = ti->pticks; |
641 | ti->pticks = 0; | |
642 | resolution = ti->resolution; | |
643 | ||
644 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
645 | spin_unlock(&timer->lock); | |
646 | if (ti->callback) | |
647 | ti->callback(ti, resolution, ticks); | |
648 | spin_lock(&timer->lock); | |
649 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
650 | } | |
2999ff5b | 651 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
652 | } |
653 | ||
654 | /* | |
655 | * timer interrupt | |
656 | * | |
657 | * ticks_left is usually equal to timer->sticks. | |
658 | * | |
659 | */ | |
53d2f744 | 660 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 661 | { |
9244b2c3 | 662 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 663 | unsigned long resolution, ticks; |
9244b2c3 | 664 | struct list_head *p, *ack_list_head; |
b32425ac | 665 | unsigned long flags; |
1da177e4 LT |
666 | int use_tasklet = 0; |
667 | ||
668 | if (timer == NULL) | |
669 | return; | |
670 | ||
b32425ac | 671 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
672 | |
673 | /* remember the current resolution */ | |
674 | if (timer->hw.c_resolution) | |
675 | resolution = timer->hw.c_resolution(timer); | |
676 | else | |
677 | resolution = timer->hw.resolution; | |
678 | ||
679 | /* loop for all active instances | |
9244b2c3 | 680 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
681 | * processed instance is relinked to done_list_head before the callback |
682 | * is called. | |
1da177e4 | 683 | */ |
9244b2c3 JB |
684 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
685 | active_list) { | |
1da177e4 LT |
686 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
687 | continue; | |
688 | ti->pticks += ticks_left; | |
689 | ti->resolution = resolution; | |
690 | if (ti->cticks < ticks_left) | |
691 | ti->cticks = 0; | |
692 | else | |
693 | ti->cticks -= ticks_left; | |
694 | if (ti->cticks) /* not expired */ | |
695 | continue; | |
696 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
697 | ti->cticks = ti->ticks; | |
698 | } else { | |
699 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
700 | if (--timer->running) | |
ee8413b0 | 701 | list_del_init(&ti->active_list); |
1da177e4 | 702 | } |
6b172a85 CL |
703 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
704 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
705 | ack_list_head = &timer->ack_list_head; | |
706 | else | |
707 | ack_list_head = &timer->sack_list_head; | |
708 | if (list_empty(&ti->ack_list)) | |
709 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 710 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
711 | ts->pticks = ti->pticks; |
712 | ts->resolution = resolution; | |
6b172a85 CL |
713 | if (list_empty(&ts->ack_list)) |
714 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
715 | } |
716 | } | |
717 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 718 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
719 | if (timer->running) { |
720 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
721 | timer->hw.stop(timer); | |
722 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
723 | } | |
724 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
725 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
726 | /* restart timer */ | |
727 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
728 | timer->hw.start(timer); | |
729 | } | |
730 | } else { | |
731 | timer->hw.stop(timer); | |
732 | } | |
733 | ||
734 | /* now process all fast callbacks */ | |
735 | while (!list_empty(&timer->ack_list_head)) { | |
736 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 737 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 738 | |
1da177e4 LT |
739 | /* remove from ack_list and make empty */ |
740 | list_del_init(p); | |
6b172a85 | 741 | |
1da177e4 LT |
742 | ticks = ti->pticks; |
743 | ti->pticks = 0; | |
744 | ||
745 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
746 | spin_unlock(&timer->lock); | |
747 | if (ti->callback) | |
748 | ti->callback(ti, resolution, ticks); | |
749 | spin_lock(&timer->lock); | |
750 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
751 | } | |
752 | ||
753 | /* do we have any slow callbacks? */ | |
754 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 755 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
756 | |
757 | if (use_tasklet) | |
1f04128a | 758 | tasklet_schedule(&timer->task_queue); |
1da177e4 LT |
759 | } |
760 | ||
761 | /* | |
762 | ||
763 | */ | |
764 | ||
53d2f744 TI |
765 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
766 | struct snd_timer **rtimer) | |
1da177e4 | 767 | { |
53d2f744 | 768 | struct snd_timer *timer; |
1da177e4 | 769 | int err; |
53d2f744 | 770 | static struct snd_device_ops ops = { |
1da177e4 LT |
771 | .dev_free = snd_timer_dev_free, |
772 | .dev_register = snd_timer_dev_register, | |
c461482c | 773 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
774 | }; |
775 | ||
7eaa943c TI |
776 | if (snd_BUG_ON(!tid)) |
777 | return -EINVAL; | |
778 | if (rtimer) | |
779 | *rtimer = NULL; | |
ca2c0966 | 780 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 781 | if (!timer) |
1da177e4 LT |
782 | return -ENOMEM; |
783 | timer->tmr_class = tid->dev_class; | |
784 | timer->card = card; | |
785 | timer->tmr_device = tid->device; | |
786 | timer->tmr_subdevice = tid->subdevice; | |
787 | if (id) | |
788 | strlcpy(timer->id, id, sizeof(timer->id)); | |
789 | INIT_LIST_HEAD(&timer->device_list); | |
790 | INIT_LIST_HEAD(&timer->open_list_head); | |
791 | INIT_LIST_HEAD(&timer->active_list_head); | |
792 | INIT_LIST_HEAD(&timer->ack_list_head); | |
793 | INIT_LIST_HEAD(&timer->sack_list_head); | |
794 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
795 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
796 | (unsigned long)timer); | |
1da177e4 | 797 | if (card != NULL) { |
de24214d | 798 | timer->module = card->module; |
6b172a85 CL |
799 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
800 | if (err < 0) { | |
1da177e4 LT |
801 | snd_timer_free(timer); |
802 | return err; | |
803 | } | |
804 | } | |
7eaa943c TI |
805 | if (rtimer) |
806 | *rtimer = timer; | |
1da177e4 LT |
807 | return 0; |
808 | } | |
809 | ||
53d2f744 | 810 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 811 | { |
7eaa943c TI |
812 | if (!timer) |
813 | return 0; | |
c461482c TI |
814 | |
815 | mutex_lock(®ister_mutex); | |
816 | if (! list_empty(&timer->open_list_head)) { | |
817 | struct list_head *p, *n; | |
818 | struct snd_timer_instance *ti; | |
cf74dcf3 | 819 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
820 | list_for_each_safe(p, n, &timer->open_list_head) { |
821 | list_del_init(p); | |
822 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
823 | ti->timer = NULL; | |
824 | } | |
825 | } | |
826 | list_del(&timer->device_list); | |
827 | mutex_unlock(®ister_mutex); | |
828 | ||
1da177e4 LT |
829 | if (timer->private_free) |
830 | timer->private_free(timer); | |
831 | kfree(timer); | |
832 | return 0; | |
833 | } | |
834 | ||
53d2f744 | 835 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 836 | { |
53d2f744 | 837 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
838 | return snd_timer_free(timer); |
839 | } | |
840 | ||
53d2f744 | 841 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 842 | { |
53d2f744 TI |
843 | struct snd_timer *timer = dev->device_data; |
844 | struct snd_timer *timer1; | |
1da177e4 | 845 | |
7eaa943c TI |
846 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
847 | return -ENXIO; | |
1da177e4 LT |
848 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
849 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
850 | return -EINVAL; | |
851 | ||
1a60d4c5 | 852 | mutex_lock(®ister_mutex); |
9244b2c3 | 853 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
854 | if (timer1->tmr_class > timer->tmr_class) |
855 | break; | |
856 | if (timer1->tmr_class < timer->tmr_class) | |
857 | continue; | |
858 | if (timer1->card && timer->card) { | |
859 | if (timer1->card->number > timer->card->number) | |
860 | break; | |
861 | if (timer1->card->number < timer->card->number) | |
862 | continue; | |
863 | } | |
864 | if (timer1->tmr_device > timer->tmr_device) | |
865 | break; | |
866 | if (timer1->tmr_device < timer->tmr_device) | |
867 | continue; | |
868 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
869 | break; | |
870 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
871 | continue; | |
872 | /* conflicts.. */ | |
1a60d4c5 | 873 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
874 | return -EBUSY; |
875 | } | |
9244b2c3 | 876 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 877 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
878 | return 0; |
879 | } | |
880 | ||
c461482c | 881 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 882 | { |
c461482c | 883 | struct snd_timer *timer = device->device_data; |
1a60d4c5 | 884 | mutex_lock(®ister_mutex); |
c461482c | 885 | list_del_init(&timer->device_list); |
1a60d4c5 | 886 | mutex_unlock(®ister_mutex); |
c461482c | 887 | return 0; |
1da177e4 LT |
888 | } |
889 | ||
53d2f744 | 890 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
891 | { |
892 | unsigned long flags; | |
893 | unsigned long resolution = 0; | |
53d2f744 | 894 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 895 | |
7c22f1aa TI |
896 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
897 | return; | |
7eaa943c TI |
898 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
899 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
900 | return; | |
1da177e4 | 901 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
902 | if (event == SNDRV_TIMER_EVENT_MSTART || |
903 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
904 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
905 | if (timer->hw.c_resolution) |
906 | resolution = timer->hw.c_resolution(timer); | |
907 | else | |
908 | resolution = timer->hw.resolution; | |
909 | } | |
9244b2c3 | 910 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
911 | if (ti->ccallback) |
912 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 913 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
914 | if (ts->ccallback) |
915 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
916 | } |
917 | spin_unlock_irqrestore(&timer->lock, flags); | |
918 | } | |
919 | ||
920 | /* | |
921 | * exported functions for global timers | |
922 | */ | |
53d2f744 | 923 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 924 | { |
53d2f744 | 925 | struct snd_timer_id tid; |
6b172a85 | 926 | |
1da177e4 LT |
927 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
928 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
929 | tid.card = -1; | |
930 | tid.device = device; | |
931 | tid.subdevice = 0; | |
932 | return snd_timer_new(NULL, id, &tid, rtimer); | |
933 | } | |
934 | ||
53d2f744 | 935 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
936 | { |
937 | return snd_timer_free(timer); | |
938 | } | |
939 | ||
53d2f744 | 940 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 941 | { |
53d2f744 | 942 | struct snd_device dev; |
1da177e4 LT |
943 | |
944 | memset(&dev, 0, sizeof(dev)); | |
945 | dev.device_data = timer; | |
946 | return snd_timer_dev_register(&dev); | |
947 | } | |
948 | ||
6b172a85 | 949 | /* |
1da177e4 LT |
950 | * System timer |
951 | */ | |
952 | ||
953 | struct snd_timer_system_private { | |
954 | struct timer_list tlist; | |
1da177e4 LT |
955 | unsigned long last_expires; |
956 | unsigned long last_jiffies; | |
957 | unsigned long correction; | |
958 | }; | |
959 | ||
1da177e4 LT |
960 | static void snd_timer_s_function(unsigned long data) |
961 | { | |
53d2f744 | 962 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
963 | struct snd_timer_system_private *priv = timer->private_data; |
964 | unsigned long jiff = jiffies; | |
965 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 966 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
967 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
968 | } | |
969 | ||
53d2f744 | 970 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
971 | { |
972 | struct snd_timer_system_private *priv; | |
973 | unsigned long njiff; | |
974 | ||
975 | priv = (struct snd_timer_system_private *) timer->private_data; | |
976 | njiff = (priv->last_jiffies = jiffies); | |
977 | if (priv->correction > timer->sticks - 1) { | |
978 | priv->correction -= timer->sticks - 1; | |
979 | njiff++; | |
980 | } else { | |
981 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 982 | priv->correction = 0; |
1da177e4 LT |
983 | } |
984 | priv->last_expires = priv->tlist.expires = njiff; | |
985 | add_timer(&priv->tlist); | |
986 | return 0; | |
987 | } | |
988 | ||
53d2f744 | 989 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
990 | { |
991 | struct snd_timer_system_private *priv; | |
992 | unsigned long jiff; | |
993 | ||
994 | priv = (struct snd_timer_system_private *) timer->private_data; | |
995 | del_timer(&priv->tlist); | |
996 | jiff = jiffies; | |
997 | if (time_before(jiff, priv->last_expires)) | |
998 | timer->sticks = priv->last_expires - jiff; | |
999 | else | |
1000 | timer->sticks = 1; | |
de2696d8 | 1001 | priv->correction = 0; |
1da177e4 LT |
1002 | return 0; |
1003 | } | |
1004 | ||
53d2f744 | 1005 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1006 | { |
1007 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1008 | .resolution = 1000000000L / HZ, | |
1009 | .ticks = 10000000L, | |
1010 | .start = snd_timer_s_start, | |
1011 | .stop = snd_timer_s_stop | |
1012 | }; | |
1013 | ||
53d2f744 | 1014 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1015 | { |
1016 | kfree(timer->private_data); | |
1017 | } | |
1018 | ||
1019 | static int snd_timer_register_system(void) | |
1020 | { | |
53d2f744 | 1021 | struct snd_timer *timer; |
1da177e4 LT |
1022 | struct snd_timer_system_private *priv; |
1023 | int err; | |
1024 | ||
6b172a85 CL |
1025 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1026 | if (err < 0) | |
1da177e4 LT |
1027 | return err; |
1028 | strcpy(timer->name, "system timer"); | |
1029 | timer->hw = snd_timer_system; | |
ca2c0966 | 1030 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1031 | if (priv == NULL) { |
1032 | snd_timer_free(timer); | |
1033 | return -ENOMEM; | |
1034 | } | |
f169c105 | 1035 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
1da177e4 LT |
1036 | timer->private_data = priv; |
1037 | timer->private_free = snd_timer_free_system; | |
1038 | return snd_timer_global_register(timer); | |
1039 | } | |
1040 | ||
cd6a6503 | 1041 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1042 | /* |
1043 | * Info interface | |
1044 | */ | |
1045 | ||
53d2f744 TI |
1046 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1047 | struct snd_info_buffer *buffer) | |
1da177e4 | 1048 | { |
53d2f744 TI |
1049 | struct snd_timer *timer; |
1050 | struct snd_timer_instance *ti; | |
1da177e4 | 1051 | |
1a60d4c5 | 1052 | mutex_lock(®ister_mutex); |
9244b2c3 | 1053 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
1054 | switch (timer->tmr_class) { |
1055 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1056 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1057 | break; | |
1058 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1059 | snd_iprintf(buffer, "C%i-%i: ", |
1060 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1061 | break; |
1062 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1063 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1064 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1065 | break; |
1066 | default: | |
6b172a85 CL |
1067 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1068 | timer->card ? timer->card->number : -1, | |
1069 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1070 | } |
1071 | snd_iprintf(buffer, "%s :", timer->name); | |
1072 | if (timer->hw.resolution) | |
6b172a85 CL |
1073 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1074 | timer->hw.resolution / 1000, | |
1075 | timer->hw.resolution % 1000, | |
1076 | timer->hw.ticks); | |
1da177e4 LT |
1077 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1078 | snd_iprintf(buffer, " SLAVE"); | |
1079 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1080 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1081 | snd_iprintf(buffer, " Client %s : %s\n", |
1082 | ti->owner ? ti->owner : "unknown", | |
1083 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1084 | SNDRV_TIMER_IFLG_RUNNING) | |
1085 | ? "running" : "stopped"); | |
1da177e4 | 1086 | } |
1a60d4c5 | 1087 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1088 | } |
1089 | ||
6581f4e7 | 1090 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1091 | |
1092 | static void __init snd_timer_proc_init(void) | |
1093 | { | |
1094 | struct snd_info_entry *entry; | |
1095 | ||
1096 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1097 | if (entry != NULL) { | |
e28563cc TI |
1098 | entry->c.text.read = snd_timer_proc_read; |
1099 | if (snd_info_register(entry) < 0) { | |
1100 | snd_info_free_entry(entry); | |
1101 | entry = NULL; | |
1102 | } | |
1103 | } | |
1104 | snd_timer_proc_entry = entry; | |
1105 | } | |
1106 | ||
1107 | static void __exit snd_timer_proc_done(void) | |
1108 | { | |
746d4a02 | 1109 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1110 | } |
cd6a6503 | 1111 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1112 | #define snd_timer_proc_init() |
1113 | #define snd_timer_proc_done() | |
1114 | #endif | |
1115 | ||
1da177e4 LT |
1116 | /* |
1117 | * USER SPACE interface | |
1118 | */ | |
1119 | ||
53d2f744 | 1120 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1121 | unsigned long resolution, |
1122 | unsigned long ticks) | |
1123 | { | |
53d2f744 TI |
1124 | struct snd_timer_user *tu = timeri->callback_data; |
1125 | struct snd_timer_read *r; | |
1da177e4 | 1126 | int prev; |
6b172a85 | 1127 | |
1da177e4 LT |
1128 | spin_lock(&tu->qlock); |
1129 | if (tu->qused > 0) { | |
1130 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1131 | r = &tu->queue[prev]; | |
1132 | if (r->resolution == resolution) { | |
1133 | r->ticks += ticks; | |
1134 | goto __wake; | |
1135 | } | |
1136 | } | |
1137 | if (tu->qused >= tu->queue_size) { | |
1138 | tu->overrun++; | |
1139 | } else { | |
1140 | r = &tu->queue[tu->qtail++]; | |
1141 | tu->qtail %= tu->queue_size; | |
1142 | r->resolution = resolution; | |
1143 | r->ticks = ticks; | |
1144 | tu->qused++; | |
1145 | } | |
1146 | __wake: | |
1147 | spin_unlock(&tu->qlock); | |
1148 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1149 | wake_up(&tu->qchange_sleep); | |
1150 | } | |
1151 | ||
53d2f744 TI |
1152 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1153 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1154 | { |
1155 | if (tu->qused >= tu->queue_size) { | |
1156 | tu->overrun++; | |
1157 | } else { | |
1158 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1159 | tu->qtail %= tu->queue_size; | |
1160 | tu->qused++; | |
1161 | } | |
1162 | } | |
1163 | ||
53d2f744 TI |
1164 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1165 | int event, | |
1da177e4 LT |
1166 | struct timespec *tstamp, |
1167 | unsigned long resolution) | |
1168 | { | |
53d2f744 TI |
1169 | struct snd_timer_user *tu = timeri->callback_data; |
1170 | struct snd_timer_tread r1; | |
bfe70783 | 1171 | unsigned long flags; |
1da177e4 | 1172 | |
6b172a85 CL |
1173 | if (event >= SNDRV_TIMER_EVENT_START && |
1174 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1175 | tu->tstamp = *tstamp; |
1176 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1177 | return; | |
1178 | r1.event = event; | |
1179 | r1.tstamp = *tstamp; | |
1180 | r1.val = resolution; | |
bfe70783 | 1181 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1182 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1183 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1184 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1185 | wake_up(&tu->qchange_sleep); | |
1186 | } | |
1187 | ||
53d2f744 | 1188 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1189 | unsigned long resolution, |
1190 | unsigned long ticks) | |
1191 | { | |
53d2f744 TI |
1192 | struct snd_timer_user *tu = timeri->callback_data; |
1193 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1194 | struct timespec tstamp; |
1195 | int prev, append = 0; | |
1196 | ||
07799e75 | 1197 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1198 | spin_lock(&tu->qlock); |
6b172a85 CL |
1199 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1200 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1201 | spin_unlock(&tu->qlock); |
1202 | return; | |
1203 | } | |
b751eef1 JK |
1204 | if (tu->last_resolution != resolution || ticks > 0) { |
1205 | if (timer_tstamp_monotonic) | |
26204e04 | 1206 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1207 | else |
1208 | getnstimeofday(&tstamp); | |
1209 | } | |
6b172a85 CL |
1210 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1211 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1212 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1213 | r1.tstamp = tstamp; | |
1214 | r1.val = resolution; | |
1215 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1216 | tu->last_resolution = resolution; | |
1217 | append++; | |
1218 | } | |
1219 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1220 | goto __wake; | |
1221 | if (ticks == 0) | |
1222 | goto __wake; | |
1223 | if (tu->qused > 0) { | |
1224 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1225 | r = &tu->tqueue[prev]; | |
1226 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1227 | r->tstamp = tstamp; | |
1228 | r->val += ticks; | |
1229 | append++; | |
1230 | goto __wake; | |
1231 | } | |
1232 | } | |
1233 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1234 | r1.tstamp = tstamp; | |
1235 | r1.val = ticks; | |
1236 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1237 | append++; | |
1238 | __wake: | |
1239 | spin_unlock(&tu->qlock); | |
1240 | if (append == 0) | |
1241 | return; | |
1242 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1243 | wake_up(&tu->qchange_sleep); | |
1244 | } | |
1245 | ||
1246 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1247 | { | |
53d2f744 | 1248 | struct snd_timer_user *tu; |
02f4865f TI |
1249 | int err; |
1250 | ||
1251 | err = nonseekable_open(inode, file); | |
1252 | if (err < 0) | |
1253 | return err; | |
6b172a85 | 1254 | |
ca2c0966 | 1255 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1256 | if (tu == NULL) |
1257 | return -ENOMEM; | |
1258 | spin_lock_init(&tu->qlock); | |
1259 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1260 | mutex_init(&tu->ioctl_lock); |
1da177e4 LT |
1261 | tu->ticks = 1; |
1262 | tu->queue_size = 128; | |
53d2f744 | 1263 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1264 | GFP_KERNEL); |
1da177e4 LT |
1265 | if (tu->queue == NULL) { |
1266 | kfree(tu); | |
1267 | return -ENOMEM; | |
1268 | } | |
1269 | file->private_data = tu; | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1274 | { | |
53d2f744 | 1275 | struct snd_timer_user *tu; |
1da177e4 LT |
1276 | |
1277 | if (file->private_data) { | |
1278 | tu = file->private_data; | |
1279 | file->private_data = NULL; | |
af368027 | 1280 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1281 | if (tu->timeri) |
1282 | snd_timer_close(tu->timeri); | |
af368027 | 1283 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1284 | kfree(tu->queue); |
1285 | kfree(tu->tqueue); | |
1286 | kfree(tu); | |
1287 | } | |
1288 | return 0; | |
1289 | } | |
1290 | ||
53d2f744 | 1291 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1292 | { |
1293 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1294 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1295 | id->card = -1; | |
1296 | id->device = -1; | |
1297 | id->subdevice = -1; | |
1298 | } | |
1299 | ||
53d2f744 | 1300 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1301 | { |
1302 | id->dev_class = timer->tmr_class; | |
1303 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1304 | id->card = timer->card ? timer->card->number : -1; | |
1305 | id->device = timer->tmr_device; | |
1306 | id->subdevice = timer->tmr_subdevice; | |
1307 | } | |
1308 | ||
53d2f744 | 1309 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1310 | { |
53d2f744 TI |
1311 | struct snd_timer_id id; |
1312 | struct snd_timer *timer; | |
1da177e4 | 1313 | struct list_head *p; |
6b172a85 | 1314 | |
1da177e4 LT |
1315 | if (copy_from_user(&id, _tid, sizeof(id))) |
1316 | return -EFAULT; | |
1a60d4c5 | 1317 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1318 | if (id.dev_class < 0) { /* first item */ |
1319 | if (list_empty(&snd_timer_list)) | |
1320 | snd_timer_user_zero_id(&id); | |
1321 | else { | |
9dfba380 | 1322 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1323 | struct snd_timer, device_list); |
1da177e4 LT |
1324 | snd_timer_user_copy_id(&id, timer); |
1325 | } | |
1326 | } else { | |
1327 | switch (id.dev_class) { | |
1328 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1329 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1330 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1331 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1332 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1333 | snd_timer_user_copy_id(&id, timer); | |
1334 | break; | |
1335 | } | |
1336 | if (timer->tmr_device >= id.device) { | |
1337 | snd_timer_user_copy_id(&id, timer); | |
1338 | break; | |
1339 | } | |
1340 | } | |
1341 | if (p == &snd_timer_list) | |
1342 | snd_timer_user_zero_id(&id); | |
1343 | break; | |
1344 | case SNDRV_TIMER_CLASS_CARD: | |
1345 | case SNDRV_TIMER_CLASS_PCM: | |
1346 | if (id.card < 0) { | |
1347 | id.card = 0; | |
1348 | } else { | |
1349 | if (id.card < 0) { | |
1350 | id.card = 0; | |
1351 | } else { | |
1352 | if (id.device < 0) { | |
1353 | id.device = 0; | |
1354 | } else { | |
6b172a85 CL |
1355 | if (id.subdevice < 0) { |
1356 | id.subdevice = 0; | |
1357 | } else { | |
1358 | id.subdevice++; | |
1359 | } | |
1da177e4 LT |
1360 | } |
1361 | } | |
1362 | } | |
1363 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1364 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1365 | if (timer->tmr_class > id.dev_class) { |
1366 | snd_timer_user_copy_id(&id, timer); | |
1367 | break; | |
1368 | } | |
1369 | if (timer->tmr_class < id.dev_class) | |
1370 | continue; | |
1371 | if (timer->card->number > id.card) { | |
1372 | snd_timer_user_copy_id(&id, timer); | |
1373 | break; | |
1374 | } | |
1375 | if (timer->card->number < id.card) | |
1376 | continue; | |
1377 | if (timer->tmr_device > id.device) { | |
1378 | snd_timer_user_copy_id(&id, timer); | |
1379 | break; | |
1380 | } | |
1381 | if (timer->tmr_device < id.device) | |
1382 | continue; | |
1383 | if (timer->tmr_subdevice > id.subdevice) { | |
1384 | snd_timer_user_copy_id(&id, timer); | |
1385 | break; | |
1386 | } | |
1387 | if (timer->tmr_subdevice < id.subdevice) | |
1388 | continue; | |
1389 | snd_timer_user_copy_id(&id, timer); | |
1390 | break; | |
1391 | } | |
1392 | if (p == &snd_timer_list) | |
1393 | snd_timer_user_zero_id(&id); | |
1394 | break; | |
1395 | default: | |
1396 | snd_timer_user_zero_id(&id); | |
1397 | } | |
1398 | } | |
1a60d4c5 | 1399 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1400 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1401 | return -EFAULT; | |
1402 | return 0; | |
6b172a85 | 1403 | } |
1da177e4 | 1404 | |
6b172a85 | 1405 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1406 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1407 | { |
53d2f744 TI |
1408 | struct snd_timer_ginfo *ginfo; |
1409 | struct snd_timer_id tid; | |
1410 | struct snd_timer *t; | |
1da177e4 LT |
1411 | struct list_head *p; |
1412 | int err = 0; | |
1413 | ||
ef44a1ec LZ |
1414 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1415 | if (IS_ERR(ginfo)) | |
1416 | return PTR_ERR(ginfo); | |
1417 | ||
1da177e4 LT |
1418 | tid = ginfo->tid; |
1419 | memset(ginfo, 0, sizeof(*ginfo)); | |
1420 | ginfo->tid = tid; | |
1a60d4c5 | 1421 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1422 | t = snd_timer_find(&tid); |
1423 | if (t != NULL) { | |
1424 | ginfo->card = t->card ? t->card->number : -1; | |
1425 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1426 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1427 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1428 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1429 | ginfo->resolution = t->hw.resolution; | |
1430 | if (t->hw.resolution_min > 0) { | |
1431 | ginfo->resolution_min = t->hw.resolution_min; | |
1432 | ginfo->resolution_max = t->hw.resolution_max; | |
1433 | } | |
1434 | list_for_each(p, &t->open_list_head) { | |
1435 | ginfo->clients++; | |
1436 | } | |
1437 | } else { | |
1438 | err = -ENODEV; | |
1439 | } | |
1a60d4c5 | 1440 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1441 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1442 | err = -EFAULT; | |
1443 | kfree(ginfo); | |
1444 | return err; | |
1445 | } | |
1446 | ||
6b172a85 | 1447 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1448 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1449 | { |
53d2f744 TI |
1450 | struct snd_timer_gparams gparams; |
1451 | struct snd_timer *t; | |
1da177e4 LT |
1452 | int err; |
1453 | ||
1454 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1455 | return -EFAULT; | |
1a60d4c5 | 1456 | mutex_lock(®ister_mutex); |
1da177e4 | 1457 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1458 | if (!t) { |
1da177e4 | 1459 | err = -ENODEV; |
6b172a85 CL |
1460 | goto _error; |
1461 | } | |
1462 | if (!list_empty(&t->open_list_head)) { | |
1463 | err = -EBUSY; | |
1464 | goto _error; | |
1465 | } | |
1466 | if (!t->hw.set_period) { | |
1467 | err = -ENOSYS; | |
1468 | goto _error; | |
1da177e4 | 1469 | } |
6b172a85 CL |
1470 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1471 | _error: | |
1a60d4c5 | 1472 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1473 | return err; |
1474 | } | |
1475 | ||
6b172a85 | 1476 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1477 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1478 | { |
53d2f744 TI |
1479 | struct snd_timer_gstatus gstatus; |
1480 | struct snd_timer_id tid; | |
1481 | struct snd_timer *t; | |
1da177e4 LT |
1482 | int err = 0; |
1483 | ||
1484 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1485 | return -EFAULT; | |
1486 | tid = gstatus.tid; | |
1487 | memset(&gstatus, 0, sizeof(gstatus)); | |
1488 | gstatus.tid = tid; | |
1a60d4c5 | 1489 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1490 | t = snd_timer_find(&tid); |
1491 | if (t != NULL) { | |
1492 | if (t->hw.c_resolution) | |
1493 | gstatus.resolution = t->hw.c_resolution(t); | |
1494 | else | |
1495 | gstatus.resolution = t->hw.resolution; | |
1496 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1497 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1498 | &gstatus.resolution_den); | |
1da177e4 LT |
1499 | } else { |
1500 | gstatus.resolution_num = gstatus.resolution; | |
1501 | gstatus.resolution_den = 1000000000uL; | |
1502 | } | |
1503 | } else { | |
1504 | err = -ENODEV; | |
1505 | } | |
1a60d4c5 | 1506 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1507 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1508 | err = -EFAULT; | |
1509 | return err; | |
1510 | } | |
1511 | ||
6b172a85 | 1512 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1513 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1514 | { |
53d2f744 TI |
1515 | struct snd_timer_user *tu; |
1516 | struct snd_timer_select tselect; | |
1da177e4 | 1517 | char str[32]; |
c1935b4d | 1518 | int err = 0; |
6b172a85 | 1519 | |
1da177e4 | 1520 | tu = file->private_data; |
c1935b4d | 1521 | if (tu->timeri) { |
1da177e4 | 1522 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1523 | tu->timeri = NULL; |
1524 | } | |
1525 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1526 | err = -EFAULT; | |
1527 | goto __err; | |
1528 | } | |
1da177e4 LT |
1529 | sprintf(str, "application %i", current->pid); |
1530 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1531 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1532 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1533 | if (err < 0) | |
c1935b4d | 1534 | goto __err; |
1da177e4 | 1535 | |
4d572776 JJ |
1536 | kfree(tu->queue); |
1537 | tu->queue = NULL; | |
1538 | kfree(tu->tqueue); | |
1539 | tu->tqueue = NULL; | |
1da177e4 | 1540 | if (tu->tread) { |
53d2f744 | 1541 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1542 | GFP_KERNEL); |
c1935b4d JK |
1543 | if (tu->tqueue == NULL) |
1544 | err = -ENOMEM; | |
1da177e4 | 1545 | } else { |
53d2f744 | 1546 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1547 | GFP_KERNEL); |
c1935b4d JK |
1548 | if (tu->queue == NULL) |
1549 | err = -ENOMEM; | |
1da177e4 | 1550 | } |
6b172a85 | 1551 | |
c1935b4d JK |
1552 | if (err < 0) { |
1553 | snd_timer_close(tu->timeri); | |
1554 | tu->timeri = NULL; | |
1555 | } else { | |
1556 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1557 | tu->timeri->callback = tu->tread |
1558 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1559 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1560 | tu->timeri->callback_data = (void *)tu; | |
1561 | } | |
1562 | ||
1563 | __err: | |
c1935b4d | 1564 | return err; |
1da177e4 LT |
1565 | } |
1566 | ||
6b172a85 | 1567 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1568 | struct snd_timer_info __user *_info) |
1da177e4 | 1569 | { |
53d2f744 TI |
1570 | struct snd_timer_user *tu; |
1571 | struct snd_timer_info *info; | |
1572 | struct snd_timer *t; | |
1da177e4 LT |
1573 | int err = 0; |
1574 | ||
1575 | tu = file->private_data; | |
7c64ec34 CL |
1576 | if (!tu->timeri) |
1577 | return -EBADFD; | |
1da177e4 | 1578 | t = tu->timeri->timer; |
7c64ec34 CL |
1579 | if (!t) |
1580 | return -EBADFD; | |
1da177e4 | 1581 | |
ca2c0966 | 1582 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1583 | if (! info) |
1584 | return -ENOMEM; | |
1585 | info->card = t->card ? t->card->number : -1; | |
1586 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1587 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1588 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1589 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1590 | info->resolution = t->hw.resolution; | |
1591 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1592 | err = -EFAULT; | |
1593 | kfree(info); | |
1594 | return err; | |
1595 | } | |
1596 | ||
6b172a85 | 1597 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1598 | struct snd_timer_params __user *_params) |
1da177e4 | 1599 | { |
53d2f744 TI |
1600 | struct snd_timer_user *tu; |
1601 | struct snd_timer_params params; | |
1602 | struct snd_timer *t; | |
1603 | struct snd_timer_read *tr; | |
1604 | struct snd_timer_tread *ttr; | |
1da177e4 | 1605 | int err; |
6b172a85 | 1606 | |
1da177e4 | 1607 | tu = file->private_data; |
7c64ec34 CL |
1608 | if (!tu->timeri) |
1609 | return -EBADFD; | |
1da177e4 | 1610 | t = tu->timeri->timer; |
7c64ec34 CL |
1611 | if (!t) |
1612 | return -EBADFD; | |
1da177e4 LT |
1613 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1614 | return -EFAULT; | |
1615 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1616 | err = -EINVAL; | |
1617 | goto _end; | |
1618 | } | |
6b172a85 CL |
1619 | if (params.queue_size > 0 && |
1620 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1621 | err = -EINVAL; |
1622 | goto _end; | |
1623 | } | |
1624 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1625 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1626 | (1<<SNDRV_TIMER_EVENT_START)| | |
1627 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1628 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1629 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1630 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1631 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1632 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1633 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1634 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1635 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1636 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1637 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1638 | err = -EINVAL; |
1639 | goto _end; | |
1640 | } | |
1641 | snd_timer_stop(tu->timeri); | |
1642 | spin_lock_irq(&t->lock); | |
1643 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1644 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1645 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1646 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1647 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1648 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1649 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1650 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1651 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1652 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1653 | if (params.queue_size > 0 && |
1654 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1655 | if (tu->tread) { |
6b172a85 CL |
1656 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1657 | GFP_KERNEL); | |
1da177e4 LT |
1658 | if (ttr) { |
1659 | kfree(tu->tqueue); | |
1660 | tu->queue_size = params.queue_size; | |
1661 | tu->tqueue = ttr; | |
1662 | } | |
1663 | } else { | |
6b172a85 CL |
1664 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1665 | GFP_KERNEL); | |
1da177e4 LT |
1666 | if (tr) { |
1667 | kfree(tu->queue); | |
1668 | tu->queue_size = params.queue_size; | |
1669 | tu->queue = tr; | |
1670 | } | |
1671 | } | |
1672 | } | |
1673 | tu->qhead = tu->qtail = tu->qused = 0; | |
1674 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1675 | if (tu->tread) { | |
53d2f744 | 1676 | struct snd_timer_tread tread; |
1da177e4 LT |
1677 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1678 | tread.tstamp.tv_sec = 0; | |
1679 | tread.tstamp.tv_nsec = 0; | |
1680 | tread.val = 0; | |
1681 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1682 | } else { | |
53d2f744 | 1683 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1684 | r->resolution = 0; |
1685 | r->ticks = 0; | |
1686 | tu->qused++; | |
1687 | tu->qtail++; | |
1688 | } | |
1da177e4 LT |
1689 | } |
1690 | tu->filter = params.filter; | |
1691 | tu->ticks = params.ticks; | |
1692 | err = 0; | |
1693 | _end: | |
1694 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1695 | return -EFAULT; | |
1696 | return err; | |
1697 | } | |
1698 | ||
6b172a85 | 1699 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1700 | struct snd_timer_status __user *_status) |
1da177e4 | 1701 | { |
53d2f744 TI |
1702 | struct snd_timer_user *tu; |
1703 | struct snd_timer_status status; | |
6b172a85 | 1704 | |
1da177e4 | 1705 | tu = file->private_data; |
7c64ec34 CL |
1706 | if (!tu->timeri) |
1707 | return -EBADFD; | |
1da177e4 LT |
1708 | memset(&status, 0, sizeof(status)); |
1709 | status.tstamp = tu->tstamp; | |
1710 | status.resolution = snd_timer_resolution(tu->timeri); | |
1711 | status.lost = tu->timeri->lost; | |
1712 | status.overrun = tu->overrun; | |
1713 | spin_lock_irq(&tu->qlock); | |
1714 | status.queue = tu->qused; | |
1715 | spin_unlock_irq(&tu->qlock); | |
1716 | if (copy_to_user(_status, &status, sizeof(status))) | |
1717 | return -EFAULT; | |
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | static int snd_timer_user_start(struct file *file) | |
1722 | { | |
1723 | int err; | |
53d2f744 | 1724 | struct snd_timer_user *tu; |
6b172a85 | 1725 | |
1da177e4 | 1726 | tu = file->private_data; |
7c64ec34 CL |
1727 | if (!tu->timeri) |
1728 | return -EBADFD; | |
1da177e4 LT |
1729 | snd_timer_stop(tu->timeri); |
1730 | tu->timeri->lost = 0; | |
1731 | tu->last_resolution = 0; | |
1732 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1733 | } | |
1734 | ||
1735 | static int snd_timer_user_stop(struct file *file) | |
1736 | { | |
1737 | int err; | |
53d2f744 | 1738 | struct snd_timer_user *tu; |
6b172a85 | 1739 | |
1da177e4 | 1740 | tu = file->private_data; |
7c64ec34 CL |
1741 | if (!tu->timeri) |
1742 | return -EBADFD; | |
1da177e4 LT |
1743 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1744 | } | |
1745 | ||
1746 | static int snd_timer_user_continue(struct file *file) | |
1747 | { | |
1748 | int err; | |
53d2f744 | 1749 | struct snd_timer_user *tu; |
6b172a85 | 1750 | |
1da177e4 | 1751 | tu = file->private_data; |
7c64ec34 CL |
1752 | if (!tu->timeri) |
1753 | return -EBADFD; | |
1da177e4 LT |
1754 | tu->timeri->lost = 0; |
1755 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1756 | } | |
1757 | ||
15790a6b TI |
1758 | static int snd_timer_user_pause(struct file *file) |
1759 | { | |
1760 | int err; | |
53d2f744 | 1761 | struct snd_timer_user *tu; |
6b172a85 | 1762 | |
15790a6b | 1763 | tu = file->private_data; |
7c64ec34 CL |
1764 | if (!tu->timeri) |
1765 | return -EBADFD; | |
d138b445 | 1766 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1767 | } |
1768 | ||
8c50b37c TI |
1769 | enum { |
1770 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1771 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1772 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1773 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1774 | }; | |
1775 | ||
af368027 | 1776 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1777 | unsigned long arg) |
1da177e4 | 1778 | { |
53d2f744 | 1779 | struct snd_timer_user *tu; |
1da177e4 LT |
1780 | void __user *argp = (void __user *)arg; |
1781 | int __user *p = argp; | |
6b172a85 | 1782 | |
1da177e4 LT |
1783 | tu = file->private_data; |
1784 | switch (cmd) { | |
1785 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1786 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1787 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1788 | return snd_timer_user_next_device(argp); | |
1789 | case SNDRV_TIMER_IOCTL_TREAD: | |
1790 | { | |
1791 | int xarg; | |
6b172a85 | 1792 | |
af368027 | 1793 | if (tu->timeri) /* too late */ |
1da177e4 | 1794 | return -EBUSY; |
af368027 | 1795 | if (get_user(xarg, p)) |
1da177e4 LT |
1796 | return -EFAULT; |
1797 | tu->tread = xarg ? 1 : 0; | |
1798 | return 0; | |
1799 | } | |
1800 | case SNDRV_TIMER_IOCTL_GINFO: | |
1801 | return snd_timer_user_ginfo(file, argp); | |
1802 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1803 | return snd_timer_user_gparams(file, argp); | |
1804 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1805 | return snd_timer_user_gstatus(file, argp); | |
1806 | case SNDRV_TIMER_IOCTL_SELECT: | |
1807 | return snd_timer_user_tselect(file, argp); | |
1808 | case SNDRV_TIMER_IOCTL_INFO: | |
1809 | return snd_timer_user_info(file, argp); | |
1810 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1811 | return snd_timer_user_params(file, argp); | |
1812 | case SNDRV_TIMER_IOCTL_STATUS: | |
1813 | return snd_timer_user_status(file, argp); | |
1814 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1815 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1816 | return snd_timer_user_start(file); |
1817 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1818 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1819 | return snd_timer_user_stop(file); |
1820 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1821 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1822 | return snd_timer_user_continue(file); |
15790a6b | 1823 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1824 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1825 | return snd_timer_user_pause(file); |
1da177e4 LT |
1826 | } |
1827 | return -ENOTTY; | |
1828 | } | |
1829 | ||
af368027 TI |
1830 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1831 | unsigned long arg) | |
1832 | { | |
1833 | struct snd_timer_user *tu = file->private_data; | |
1834 | long ret; | |
1835 | ||
1836 | mutex_lock(&tu->ioctl_lock); | |
1837 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
1838 | mutex_unlock(&tu->ioctl_lock); | |
1839 | return ret; | |
1840 | } | |
1841 | ||
1da177e4 LT |
1842 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
1843 | { | |
53d2f744 | 1844 | struct snd_timer_user *tu; |
6b172a85 | 1845 | |
1da177e4 | 1846 | tu = file->private_data; |
60aa4924 | 1847 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
1848 | } |
1849 | ||
6b172a85 CL |
1850 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1851 | size_t count, loff_t *offset) | |
1da177e4 | 1852 | { |
53d2f744 | 1853 | struct snd_timer_user *tu; |
1da177e4 LT |
1854 | long result = 0, unit; |
1855 | int err = 0; | |
6b172a85 | 1856 | |
1da177e4 | 1857 | tu = file->private_data; |
53d2f744 | 1858 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1859 | spin_lock_irq(&tu->qlock); |
1860 | while ((long)count - result >= unit) { | |
1861 | while (!tu->qused) { | |
1862 | wait_queue_t wait; | |
1863 | ||
1864 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1865 | err = -EAGAIN; | |
1866 | break; | |
1867 | } | |
1868 | ||
1869 | set_current_state(TASK_INTERRUPTIBLE); | |
1870 | init_waitqueue_entry(&wait, current); | |
1871 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1872 | ||
1873 | spin_unlock_irq(&tu->qlock); | |
1874 | schedule(); | |
1875 | spin_lock_irq(&tu->qlock); | |
1876 | ||
1877 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1878 | ||
1879 | if (signal_pending(current)) { | |
1880 | err = -ERESTARTSYS; | |
1881 | break; | |
1882 | } | |
1883 | } | |
1884 | ||
1885 | spin_unlock_irq(&tu->qlock); | |
1886 | if (err < 0) | |
1887 | goto _error; | |
1888 | ||
1889 | if (tu->tread) { | |
6b172a85 | 1890 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1891 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1892 | err = -EFAULT; |
1893 | goto _error; | |
1894 | } | |
1895 | } else { | |
6b172a85 | 1896 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1897 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1898 | err = -EFAULT; |
1899 | goto _error; | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | tu->qhead %= tu->queue_size; | |
1904 | ||
1905 | result += unit; | |
1906 | buffer += unit; | |
1907 | ||
1908 | spin_lock_irq(&tu->qlock); | |
1909 | tu->qused--; | |
1910 | } | |
1911 | spin_unlock_irq(&tu->qlock); | |
1912 | _error: | |
1913 | return result > 0 ? result : err; | |
1914 | } | |
1915 | ||
1916 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1917 | { | |
1918 | unsigned int mask; | |
53d2f744 | 1919 | struct snd_timer_user *tu; |
1da177e4 LT |
1920 | |
1921 | tu = file->private_data; | |
1922 | ||
1923 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1924 | |
1da177e4 LT |
1925 | mask = 0; |
1926 | if (tu->qused) | |
1927 | mask |= POLLIN | POLLRDNORM; | |
1928 | ||
1929 | return mask; | |
1930 | } | |
1931 | ||
1932 | #ifdef CONFIG_COMPAT | |
1933 | #include "timer_compat.c" | |
1934 | #else | |
1935 | #define snd_timer_user_ioctl_compat NULL | |
1936 | #endif | |
1937 | ||
9c2e08c5 | 1938 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
1939 | { |
1940 | .owner = THIS_MODULE, | |
1941 | .read = snd_timer_user_read, | |
1942 | .open = snd_timer_user_open, | |
1943 | .release = snd_timer_user_release, | |
02f4865f | 1944 | .llseek = no_llseek, |
1da177e4 LT |
1945 | .poll = snd_timer_user_poll, |
1946 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1947 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1948 | .fasync = snd_timer_user_fasync, | |
1949 | }; | |
1950 | ||
7c35860d TI |
1951 | /* unregister the system timer */ |
1952 | static void snd_timer_free_all(void) | |
1953 | { | |
1954 | struct snd_timer *timer, *n; | |
1955 | ||
1956 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
1957 | snd_timer_free(timer); | |
1958 | } | |
1959 | ||
89da061f TI |
1960 | static struct device timer_dev; |
1961 | ||
1da177e4 LT |
1962 | /* |
1963 | * ENTRY functions | |
1964 | */ | |
1965 | ||
1da177e4 LT |
1966 | static int __init alsa_timer_init(void) |
1967 | { | |
1968 | int err; | |
1da177e4 | 1969 | |
89da061f TI |
1970 | snd_device_initialize(&timer_dev, NULL); |
1971 | dev_set_name(&timer_dev, "timer"); | |
1972 | ||
1da177e4 | 1973 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
1974 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1975 | "system timer"); | |
1da177e4 | 1976 | #endif |
e28563cc | 1977 | |
7c35860d TI |
1978 | err = snd_timer_register_system(); |
1979 | if (err < 0) { | |
cf74dcf3 | 1980 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
89da061f | 1981 | put_device(&timer_dev); |
7c35860d TI |
1982 | return err; |
1983 | } | |
1984 | ||
40a4b263 TI |
1985 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1986 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 1987 | if (err < 0) { |
cf74dcf3 | 1988 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 1989 | snd_timer_free_all(); |
89da061f | 1990 | put_device(&timer_dev); |
7c35860d TI |
1991 | return err; |
1992 | } | |
1993 | ||
e28563cc | 1994 | snd_timer_proc_init(); |
1da177e4 LT |
1995 | return 0; |
1996 | } | |
1997 | ||
1998 | static void __exit alsa_timer_exit(void) | |
1999 | { | |
40a4b263 | 2000 | snd_unregister_device(&timer_dev); |
7c35860d | 2001 | snd_timer_free_all(); |
89da061f | 2002 | put_device(&timer_dev); |
e28563cc | 2003 | snd_timer_proc_done(); |
1da177e4 LT |
2004 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2005 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2006 | #endif | |
2007 | } | |
2008 | ||
2009 | module_init(alsa_timer_init) | |
2010 | module_exit(alsa_timer_exit) | |
2011 | ||
2012 | EXPORT_SYMBOL(snd_timer_open); | |
2013 | EXPORT_SYMBOL(snd_timer_close); | |
2014 | EXPORT_SYMBOL(snd_timer_resolution); | |
2015 | EXPORT_SYMBOL(snd_timer_start); | |
2016 | EXPORT_SYMBOL(snd_timer_stop); | |
2017 | EXPORT_SYMBOL(snd_timer_continue); | |
2018 | EXPORT_SYMBOL(snd_timer_pause); | |
2019 | EXPORT_SYMBOL(snd_timer_new); | |
2020 | EXPORT_SYMBOL(snd_timer_notify); | |
2021 | EXPORT_SYMBOL(snd_timer_global_new); | |
2022 | EXPORT_SYMBOL(snd_timer_global_free); | |
2023 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 2024 | EXPORT_SYMBOL(snd_timer_interrupt); |