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; | |
230323da | 68 | bool disconnected; |
53d2f744 TI |
69 | struct snd_timer_read *queue; |
70 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
71 | spinlock_t qlock; |
72 | unsigned long last_resolution; | |
73 | unsigned int filter; | |
74 | struct timespec tstamp; /* trigger tstamp */ | |
75 | wait_queue_head_t qchange_sleep; | |
76 | struct fasync_struct *fasync; | |
af368027 | 77 | struct mutex ioctl_lock; |
53d2f744 | 78 | }; |
1da177e4 LT |
79 | |
80 | /* list of timers */ | |
81 | static LIST_HEAD(snd_timer_list); | |
82 | ||
83 | /* list of slave instances */ | |
84 | static LIST_HEAD(snd_timer_slave_list); | |
85 | ||
86 | /* lock for slave active lists */ | |
87 | static DEFINE_SPINLOCK(slave_active_lock); | |
88 | ||
1a60d4c5 | 89 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 90 | |
53d2f744 TI |
91 | static int snd_timer_free(struct snd_timer *timer); |
92 | static int snd_timer_dev_free(struct snd_device *device); | |
93 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 94 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 95 | |
53d2f744 | 96 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
97 | |
98 | /* | |
99 | * create a timer instance with the given owner string. | |
100 | * when timer is not NULL, increments the module counter | |
101 | */ | |
53d2f744 TI |
102 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
103 | struct snd_timer *timer) | |
1da177e4 | 104 | { |
53d2f744 | 105 | struct snd_timer_instance *timeri; |
ca2c0966 | 106 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
107 | if (timeri == NULL) |
108 | return NULL; | |
543537bd | 109 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
110 | if (! timeri->owner) { |
111 | kfree(timeri); | |
112 | return NULL; | |
113 | } | |
114 | INIT_LIST_HEAD(&timeri->open_list); | |
115 | INIT_LIST_HEAD(&timeri->active_list); | |
116 | INIT_LIST_HEAD(&timeri->ack_list); | |
117 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
118 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
119 | ||
120 | timeri->timer = timer; | |
de24214d | 121 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
122 | kfree(timeri->owner); |
123 | kfree(timeri); | |
124 | return NULL; | |
125 | } | |
126 | ||
127 | return timeri; | |
128 | } | |
129 | ||
130 | /* | |
131 | * find a timer instance from the given timer id | |
132 | */ | |
53d2f744 | 133 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 134 | { |
53d2f744 | 135 | struct snd_timer *timer = NULL; |
1da177e4 | 136 | |
9244b2c3 | 137 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
138 | if (timer->tmr_class != tid->dev_class) |
139 | continue; | |
140 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
141 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
142 | (timer->card == NULL || | |
143 | timer->card->number != tid->card)) | |
144 | continue; | |
145 | if (timer->tmr_device != tid->device) | |
146 | continue; | |
147 | if (timer->tmr_subdevice != tid->subdevice) | |
148 | continue; | |
149 | return timer; | |
150 | } | |
151 | return NULL; | |
152 | } | |
153 | ||
ee2da997 | 154 | #ifdef CONFIG_MODULES |
1da177e4 | 155 | |
53d2f744 | 156 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 157 | { |
1da177e4 LT |
158 | switch (tid->dev_class) { |
159 | case SNDRV_TIMER_CLASS_GLOBAL: | |
160 | if (tid->device < timer_limit) | |
161 | request_module("snd-timer-%i", tid->device); | |
162 | break; | |
163 | case SNDRV_TIMER_CLASS_CARD: | |
164 | case SNDRV_TIMER_CLASS_PCM: | |
165 | if (tid->card < snd_ecards_limit) | |
166 | request_module("snd-card-%i", tid->card); | |
167 | break; | |
168 | default: | |
169 | break; | |
170 | } | |
171 | } | |
172 | ||
173 | #endif | |
174 | ||
175 | /* | |
176 | * look for a master instance matching with the slave id of the given slave. | |
177 | * when found, relink the open_link of the slave. | |
178 | * | |
179 | * call this with register_mutex down. | |
180 | */ | |
53d2f744 | 181 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 182 | { |
53d2f744 TI |
183 | struct snd_timer *timer; |
184 | struct snd_timer_instance *master; | |
1da177e4 LT |
185 | |
186 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
187 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
188 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
189 | if (slave->slave_class == master->slave_class && |
190 | slave->slave_id == master->slave_id) { | |
5b7c757d NK |
191 | list_move_tail(&slave->open_list, |
192 | &master->slave_list_head); | |
1da177e4 LT |
193 | spin_lock_irq(&slave_active_lock); |
194 | slave->master = master; | |
195 | slave->timer = master->timer; | |
196 | spin_unlock_irq(&slave_active_lock); | |
197 | return; | |
198 | } | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | /* | |
204 | * look for slave instances matching with the slave id of the given master. | |
205 | * when found, relink the open_link of slaves. | |
206 | * | |
207 | * call this with register_mutex down. | |
208 | */ | |
53d2f744 | 209 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 210 | { |
9244b2c3 | 211 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
212 | |
213 | /* check all pending slaves */ | |
9244b2c3 | 214 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
215 | if (slave->slave_class == master->slave_class && |
216 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 217 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 | 218 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 219 | spin_lock(&master->timer->lock); |
1da177e4 LT |
220 | slave->master = master; |
221 | slave->timer = master->timer; | |
222 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
223 | list_add_tail(&slave->active_list, |
224 | &master->slave_active_head); | |
b5a663aa | 225 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
226 | spin_unlock_irq(&slave_active_lock); |
227 | } | |
228 | } | |
229 | } | |
230 | ||
231 | /* | |
232 | * open a timer instance | |
233 | * when opening a master, the slave id must be here given. | |
234 | */ | |
53d2f744 TI |
235 | int snd_timer_open(struct snd_timer_instance **ti, |
236 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
237 | unsigned int slave_id) |
238 | { | |
53d2f744 TI |
239 | struct snd_timer *timer; |
240 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 241 | |
1da177e4 LT |
242 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
243 | /* open a slave instance */ | |
244 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
245 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
246 | pr_debug("ALSA: timer: invalid slave class %i\n", |
247 | tid->dev_sclass); | |
1da177e4 LT |
248 | return -EINVAL; |
249 | } | |
1a60d4c5 | 250 | mutex_lock(®ister_mutex); |
1da177e4 | 251 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 252 | if (!timeri) { |
1a60d4c5 | 253 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
254 | return -ENOMEM; |
255 | } | |
1da177e4 LT |
256 | timeri->slave_class = tid->dev_sclass; |
257 | timeri->slave_id = tid->device; | |
258 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
259 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
260 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 261 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
262 | *ti = timeri; |
263 | return 0; | |
264 | } | |
265 | ||
266 | /* open a master instance */ | |
1a60d4c5 | 267 | mutex_lock(®ister_mutex); |
1da177e4 | 268 | timer = snd_timer_find(tid); |
ee2da997 JB |
269 | #ifdef CONFIG_MODULES |
270 | if (!timer) { | |
1a60d4c5 | 271 | mutex_unlock(®ister_mutex); |
1da177e4 | 272 | snd_timer_request(tid); |
1a60d4c5 | 273 | mutex_lock(®ister_mutex); |
1da177e4 LT |
274 | timer = snd_timer_find(tid); |
275 | } | |
276 | #endif | |
2fd43d11 | 277 | if (!timer) { |
1a60d4c5 | 278 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
279 | return -ENODEV; |
280 | } | |
2fd43d11 CL |
281 | if (!list_empty(&timer->open_list_head)) { |
282 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 283 | struct snd_timer_instance, open_list); |
2fd43d11 | 284 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 285 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
286 | return -EBUSY; |
287 | } | |
288 | } | |
289 | timeri = snd_timer_instance_new(owner, timer); | |
290 | if (!timeri) { | |
1a60d4c5 | 291 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
292 | return -ENOMEM; |
293 | } | |
230323da TI |
294 | /* take a card refcount for safe disconnection */ |
295 | if (timer->card) | |
296 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
297 | timeri->slave_class = tid->dev_sclass; |
298 | timeri->slave_id = slave_id; | |
299 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
300 | timer->hw.open(timer); | |
301 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
302 | snd_timer_check_master(timeri); | |
1a60d4c5 | 303 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
304 | *ti = timeri; |
305 | return 0; | |
306 | } | |
307 | ||
1da177e4 LT |
308 | /* |
309 | * close a timer instance | |
310 | */ | |
53d2f744 | 311 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 312 | { |
53d2f744 | 313 | struct snd_timer *timer = NULL; |
9244b2c3 | 314 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 315 | |
0072889a | 316 | if (snd_BUG_ON(!timeri)) |
7eaa943c | 317 | return -ENXIO; |
1da177e4 | 318 | |
9984d1b5 TI |
319 | mutex_lock(®ister_mutex); |
320 | list_del(&timeri->open_list); | |
321 | ||
1da177e4 LT |
322 | /* force to stop the timer */ |
323 | snd_timer_stop(timeri); | |
324 | ||
9984d1b5 TI |
325 | timer = timeri->timer; |
326 | if (timer) { | |
1da177e4 LT |
327 | /* wait, until the active callback is finished */ |
328 | spin_lock_irq(&timer->lock); | |
329 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
330 | spin_unlock_irq(&timer->lock); | |
331 | udelay(10); | |
332 | spin_lock_irq(&timer->lock); | |
333 | } | |
334 | spin_unlock_irq(&timer->lock); | |
9984d1b5 | 335 | |
1da177e4 | 336 | /* remove slave links */ |
b5a663aa TI |
337 | spin_lock_irq(&slave_active_lock); |
338 | spin_lock(&timer->lock); | |
9244b2c3 JB |
339 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
340 | open_list) { | |
9244b2c3 | 341 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
342 | slave->master = NULL; |
343 | slave->timer = NULL; | |
b5a663aa TI |
344 | list_del_init(&slave->ack_list); |
345 | list_del_init(&slave->active_list); | |
1da177e4 | 346 | } |
b5a663aa TI |
347 | spin_unlock(&timer->lock); |
348 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
349 | |
350 | /* slave doesn't need to release timer resources below */ | |
351 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
352 | timer = NULL; | |
1da177e4 | 353 | } |
9984d1b5 | 354 | |
1da177e4 LT |
355 | if (timeri->private_free) |
356 | timeri->private_free(timeri); | |
357 | kfree(timeri->owner); | |
358 | kfree(timeri); | |
9984d1b5 TI |
359 | |
360 | if (timer) { | |
361 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
362 | timer->hw.close(timer); | |
363 | /* release a card refcount for safe disconnection */ | |
364 | if (timer->card) | |
365 | put_device(&timer->card->card_dev); | |
de24214d | 366 | module_put(timer->module); |
9984d1b5 TI |
367 | } |
368 | ||
369 | mutex_unlock(®ister_mutex); | |
1da177e4 LT |
370 | return 0; |
371 | } | |
372 | ||
53d2f744 | 373 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 374 | { |
53d2f744 | 375 | struct snd_timer * timer; |
1da177e4 LT |
376 | |
377 | if (timeri == NULL) | |
378 | return 0; | |
379 | if ((timer = timeri->timer) != NULL) { | |
380 | if (timer->hw.c_resolution) | |
381 | return timer->hw.c_resolution(timer); | |
382 | return timer->hw.resolution; | |
383 | } | |
384 | return 0; | |
385 | } | |
386 | ||
53d2f744 | 387 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 388 | { |
53d2f744 | 389 | struct snd_timer *timer; |
1da177e4 | 390 | unsigned long resolution = 0; |
53d2f744 | 391 | struct snd_timer_instance *ts; |
1da177e4 LT |
392 | struct timespec tstamp; |
393 | ||
b751eef1 | 394 | if (timer_tstamp_monotonic) |
26204e04 | 395 | ktime_get_ts(&tstamp); |
b751eef1 JK |
396 | else |
397 | getnstimeofday(&tstamp); | |
7eaa943c TI |
398 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
399 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
400 | return; | |
6b172a85 CL |
401 | if (event == SNDRV_TIMER_EVENT_START || |
402 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
403 | resolution = snd_timer_resolution(ti); |
404 | if (ti->ccallback) | |
b30477d5 | 405 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
406 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
407 | return; | |
408 | timer = ti->timer; | |
409 | if (timer == NULL) | |
410 | return; | |
411 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
412 | return; | |
9244b2c3 | 413 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 414 | if (ts->ccallback) |
117159f0 | 415 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
416 | } |
417 | ||
f65e0d29 TI |
418 | /* start/continue a master timer */ |
419 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
420 | bool start, unsigned long ticks) | |
1da177e4 | 421 | { |
f65e0d29 TI |
422 | struct snd_timer *timer; |
423 | int result; | |
424 | unsigned long flags; | |
425 | ||
426 | timer = timeri->timer; | |
427 | if (!timer) | |
428 | return -EINVAL; | |
429 | ||
430 | spin_lock_irqsave(&timer->lock, flags); | |
431 | if (timer->card && timer->card->shutdown) { | |
432 | result = -ENODEV; | |
433 | goto unlock; | |
434 | } | |
435 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
436 | SNDRV_TIMER_IFLG_START)) { | |
437 | result = -EBUSY; | |
438 | goto unlock; | |
439 | } | |
440 | ||
441 | if (start) | |
442 | timeri->ticks = timeri->cticks = ticks; | |
443 | else if (!timeri->cticks) | |
444 | timeri->cticks = 1; | |
445 | timeri->pticks = 0; | |
446 | ||
5b7c757d | 447 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
448 | if (timer->running) { |
449 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
450 | goto __start_now; | |
451 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
452 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 453 | result = 1; /* delayed start */ |
1da177e4 | 454 | } else { |
f65e0d29 TI |
455 | if (start) |
456 | timer->sticks = ticks; | |
1da177e4 LT |
457 | timer->hw.start(timer); |
458 | __start_now: | |
459 | timer->running++; | |
460 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 461 | result = 0; |
1da177e4 | 462 | } |
f65e0d29 TI |
463 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
464 | SNDRV_TIMER_EVENT_CONTINUE); | |
465 | unlock: | |
466 | spin_unlock_irqrestore(&timer->lock, flags); | |
467 | return result; | |
1da177e4 LT |
468 | } |
469 | ||
f65e0d29 TI |
470 | /* start/continue a slave timer */ |
471 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
472 | bool start) | |
1da177e4 LT |
473 | { |
474 | unsigned long flags; | |
475 | ||
476 | spin_lock_irqsave(&slave_active_lock, flags); | |
f784beb7 TI |
477 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
478 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
479 | return -EBUSY; | |
480 | } | |
1da177e4 | 481 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
482 | if (timeri->master && timeri->timer) { |
483 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
484 | list_add_tail(&timeri->active_list, |
485 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
486 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
487 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
488 | spin_unlock(&timeri->timer->lock); |
489 | } | |
1da177e4 LT |
490 | spin_unlock_irqrestore(&slave_active_lock, flags); |
491 | return 1; /* delayed start */ | |
492 | } | |
493 | ||
f65e0d29 TI |
494 | /* stop/pause a master timer */ |
495 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 496 | { |
53d2f744 | 497 | struct snd_timer *timer; |
f65e0d29 | 498 | int result = 0; |
1da177e4 LT |
499 | unsigned long flags; |
500 | ||
1da177e4 LT |
501 | timer = timeri->timer; |
502 | if (!timer) | |
503 | return -EINVAL; | |
504 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
505 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
506 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
507 | result = -EBUSY; |
508 | goto unlock; | |
f784beb7 | 509 | } |
1da177e4 LT |
510 | list_del_init(&timeri->ack_list); |
511 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
512 | if (timer->card && timer->card->shutdown) |
513 | goto unlock; | |
514 | if (stop) { | |
515 | timeri->cticks = timeri->ticks; | |
516 | timeri->pticks = 0; | |
230323da | 517 | } |
1da177e4 LT |
518 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
519 | !(--timer->running)) { | |
520 | timer->hw.stop(timer); | |
521 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
522 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
523 | snd_timer_reschedule(timer, 0); | |
524 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
525 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
526 | timer->hw.start(timer); | |
527 | } | |
528 | } | |
529 | } | |
c3b16813 | 530 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
f65e0d29 TI |
531 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
532 | SNDRV_TIMER_EVENT_CONTINUE); | |
533 | unlock: | |
1da177e4 | 534 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
535 | return result; |
536 | } | |
537 | ||
538 | /* stop/pause a slave timer */ | |
539 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
540 | { | |
541 | unsigned long flags; | |
542 | ||
543 | spin_lock_irqsave(&slave_active_lock, flags); | |
544 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
545 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
546 | return -EBUSY; | |
547 | } | |
548 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
549 | if (timeri->timer) { | |
550 | spin_lock(&timeri->timer->lock); | |
551 | list_del_init(&timeri->ack_list); | |
552 | list_del_init(&timeri->active_list); | |
553 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
554 | SNDRV_TIMER_EVENT_CONTINUE); | |
555 | spin_unlock(&timeri->timer->lock); | |
556 | } | |
557 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
558 | return 0; |
559 | } | |
560 | ||
f65e0d29 TI |
561 | /* |
562 | * start the timer instance | |
563 | */ | |
564 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
565 | { | |
566 | if (timeri == NULL || ticks < 1) | |
567 | return -EINVAL; | |
568 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
569 | return snd_timer_start_slave(timeri, true); | |
570 | else | |
571 | return snd_timer_start1(timeri, true, ticks); | |
572 | } | |
573 | ||
1da177e4 LT |
574 | /* |
575 | * stop the timer instance. | |
576 | * | |
577 | * do not call this from the timer callback! | |
578 | */ | |
53d2f744 | 579 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 580 | { |
f65e0d29 TI |
581 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
582 | return snd_timer_stop_slave(timeri, true); | |
583 | else | |
584 | return snd_timer_stop1(timeri, true); | |
1da177e4 LT |
585 | } |
586 | ||
587 | /* | |
588 | * start again.. the tick is kept. | |
589 | */ | |
53d2f744 | 590 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 591 | { |
1da177e4 | 592 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
593 | return snd_timer_start_slave(timeri, false); |
594 | else | |
595 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 LT |
596 | } |
597 | ||
598 | /* | |
599 | * pause.. remember the ticks left | |
600 | */ | |
53d2f744 | 601 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 602 | { |
f65e0d29 TI |
603 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
604 | return snd_timer_stop_slave(timeri, false); | |
605 | else | |
606 | return snd_timer_stop1(timeri, false); | |
1da177e4 LT |
607 | } |
608 | ||
609 | /* | |
610 | * reschedule the timer | |
611 | * | |
612 | * start pending instances and check the scheduling ticks. | |
613 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
614 | */ | |
53d2f744 | 615 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 616 | { |
53d2f744 | 617 | struct snd_timer_instance *ti; |
1da177e4 | 618 | unsigned long ticks = ~0UL; |
1da177e4 | 619 | |
9244b2c3 | 620 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
621 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
622 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
623 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
624 | timer->running++; | |
625 | } | |
626 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
627 | if (ticks > ti->cticks) | |
628 | ticks = ti->cticks; | |
629 | } | |
630 | } | |
631 | if (ticks == ~0UL) { | |
632 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
633 | return; | |
634 | } | |
635 | if (ticks > timer->hw.ticks) | |
636 | ticks = timer->hw.ticks; | |
637 | if (ticks_left != ticks) | |
638 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
639 | timer->sticks = ticks; | |
640 | } | |
641 | ||
642 | /* | |
643 | * timer tasklet | |
644 | * | |
645 | */ | |
646 | static void snd_timer_tasklet(unsigned long arg) | |
647 | { | |
53d2f744 TI |
648 | struct snd_timer *timer = (struct snd_timer *) arg; |
649 | struct snd_timer_instance *ti; | |
1da177e4 LT |
650 | struct list_head *p; |
651 | unsigned long resolution, ticks; | |
2999ff5b | 652 | unsigned long flags; |
1da177e4 | 653 | |
230323da TI |
654 | if (timer->card && timer->card->shutdown) |
655 | return; | |
656 | ||
2999ff5b | 657 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
658 | /* now process all callbacks */ |
659 | while (!list_empty(&timer->sack_list_head)) { | |
660 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 661 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
662 | |
663 | /* remove from ack_list and make empty */ | |
664 | list_del_init(p); | |
6b172a85 | 665 | |
1da177e4 LT |
666 | ticks = ti->pticks; |
667 | ti->pticks = 0; | |
668 | resolution = ti->resolution; | |
669 | ||
670 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
671 | spin_unlock(&timer->lock); | |
672 | if (ti->callback) | |
673 | ti->callback(ti, resolution, ticks); | |
674 | spin_lock(&timer->lock); | |
675 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
676 | } | |
2999ff5b | 677 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
678 | } |
679 | ||
680 | /* | |
681 | * timer interrupt | |
682 | * | |
683 | * ticks_left is usually equal to timer->sticks. | |
684 | * | |
685 | */ | |
53d2f744 | 686 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 687 | { |
9244b2c3 | 688 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 689 | unsigned long resolution, ticks; |
9244b2c3 | 690 | struct list_head *p, *ack_list_head; |
b32425ac | 691 | unsigned long flags; |
1da177e4 LT |
692 | int use_tasklet = 0; |
693 | ||
694 | if (timer == NULL) | |
695 | return; | |
696 | ||
230323da TI |
697 | if (timer->card && timer->card->shutdown) |
698 | return; | |
699 | ||
b32425ac | 700 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
701 | |
702 | /* remember the current resolution */ | |
703 | if (timer->hw.c_resolution) | |
704 | resolution = timer->hw.c_resolution(timer); | |
705 | else | |
706 | resolution = timer->hw.resolution; | |
707 | ||
708 | /* loop for all active instances | |
9244b2c3 | 709 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
710 | * processed instance is relinked to done_list_head before the callback |
711 | * is called. | |
1da177e4 | 712 | */ |
9244b2c3 JB |
713 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
714 | active_list) { | |
1da177e4 LT |
715 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
716 | continue; | |
717 | ti->pticks += ticks_left; | |
718 | ti->resolution = resolution; | |
719 | if (ti->cticks < ticks_left) | |
720 | ti->cticks = 0; | |
721 | else | |
722 | ti->cticks -= ticks_left; | |
723 | if (ti->cticks) /* not expired */ | |
724 | continue; | |
725 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
726 | ti->cticks = ti->ticks; | |
727 | } else { | |
728 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
729 | --timer->running; |
730 | list_del_init(&ti->active_list); | |
1da177e4 | 731 | } |
6b172a85 CL |
732 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
733 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
734 | ack_list_head = &timer->ack_list_head; | |
735 | else | |
736 | ack_list_head = &timer->sack_list_head; | |
737 | if (list_empty(&ti->ack_list)) | |
738 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 739 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
740 | ts->pticks = ti->pticks; |
741 | ts->resolution = resolution; | |
6b172a85 CL |
742 | if (list_empty(&ts->ack_list)) |
743 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
744 | } |
745 | } | |
746 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 747 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
748 | if (timer->running) { |
749 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
750 | timer->hw.stop(timer); | |
751 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
752 | } | |
753 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
754 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
755 | /* restart timer */ | |
756 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
757 | timer->hw.start(timer); | |
758 | } | |
759 | } else { | |
760 | timer->hw.stop(timer); | |
761 | } | |
762 | ||
763 | /* now process all fast callbacks */ | |
764 | while (!list_empty(&timer->ack_list_head)) { | |
765 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 766 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 767 | |
1da177e4 LT |
768 | /* remove from ack_list and make empty */ |
769 | list_del_init(p); | |
6b172a85 | 770 | |
1da177e4 LT |
771 | ticks = ti->pticks; |
772 | ti->pticks = 0; | |
773 | ||
774 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
775 | spin_unlock(&timer->lock); | |
776 | if (ti->callback) | |
777 | ti->callback(ti, resolution, ticks); | |
778 | spin_lock(&timer->lock); | |
779 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
780 | } | |
781 | ||
782 | /* do we have any slow callbacks? */ | |
783 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 784 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
785 | |
786 | if (use_tasklet) | |
1f04128a | 787 | tasklet_schedule(&timer->task_queue); |
1da177e4 LT |
788 | } |
789 | ||
790 | /* | |
791 | ||
792 | */ | |
793 | ||
53d2f744 TI |
794 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
795 | struct snd_timer **rtimer) | |
1da177e4 | 796 | { |
53d2f744 | 797 | struct snd_timer *timer; |
1da177e4 | 798 | int err; |
53d2f744 | 799 | static struct snd_device_ops ops = { |
1da177e4 LT |
800 | .dev_free = snd_timer_dev_free, |
801 | .dev_register = snd_timer_dev_register, | |
c461482c | 802 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
803 | }; |
804 | ||
7eaa943c TI |
805 | if (snd_BUG_ON(!tid)) |
806 | return -EINVAL; | |
807 | if (rtimer) | |
808 | *rtimer = NULL; | |
ca2c0966 | 809 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 810 | if (!timer) |
1da177e4 LT |
811 | return -ENOMEM; |
812 | timer->tmr_class = tid->dev_class; | |
813 | timer->card = card; | |
814 | timer->tmr_device = tid->device; | |
815 | timer->tmr_subdevice = tid->subdevice; | |
816 | if (id) | |
817 | strlcpy(timer->id, id, sizeof(timer->id)); | |
818 | INIT_LIST_HEAD(&timer->device_list); | |
819 | INIT_LIST_HEAD(&timer->open_list_head); | |
820 | INIT_LIST_HEAD(&timer->active_list_head); | |
821 | INIT_LIST_HEAD(&timer->ack_list_head); | |
822 | INIT_LIST_HEAD(&timer->sack_list_head); | |
823 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
824 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
825 | (unsigned long)timer); | |
1da177e4 | 826 | if (card != NULL) { |
de24214d | 827 | timer->module = card->module; |
6b172a85 CL |
828 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
829 | if (err < 0) { | |
1da177e4 LT |
830 | snd_timer_free(timer); |
831 | return err; | |
832 | } | |
833 | } | |
7eaa943c TI |
834 | if (rtimer) |
835 | *rtimer = timer; | |
1da177e4 LT |
836 | return 0; |
837 | } | |
838 | ||
53d2f744 | 839 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 840 | { |
7eaa943c TI |
841 | if (!timer) |
842 | return 0; | |
c461482c TI |
843 | |
844 | mutex_lock(®ister_mutex); | |
845 | if (! list_empty(&timer->open_list_head)) { | |
846 | struct list_head *p, *n; | |
847 | struct snd_timer_instance *ti; | |
cf74dcf3 | 848 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
849 | list_for_each_safe(p, n, &timer->open_list_head) { |
850 | list_del_init(p); | |
851 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
852 | ti->timer = NULL; | |
853 | } | |
854 | } | |
855 | list_del(&timer->device_list); | |
856 | mutex_unlock(®ister_mutex); | |
857 | ||
1da177e4 LT |
858 | if (timer->private_free) |
859 | timer->private_free(timer); | |
860 | kfree(timer); | |
861 | return 0; | |
862 | } | |
863 | ||
53d2f744 | 864 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 865 | { |
53d2f744 | 866 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
867 | return snd_timer_free(timer); |
868 | } | |
869 | ||
53d2f744 | 870 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 871 | { |
53d2f744 TI |
872 | struct snd_timer *timer = dev->device_data; |
873 | struct snd_timer *timer1; | |
1da177e4 | 874 | |
7eaa943c TI |
875 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
876 | return -ENXIO; | |
1da177e4 LT |
877 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
878 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
879 | return -EINVAL; | |
880 | ||
1a60d4c5 | 881 | mutex_lock(®ister_mutex); |
9244b2c3 | 882 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
883 | if (timer1->tmr_class > timer->tmr_class) |
884 | break; | |
885 | if (timer1->tmr_class < timer->tmr_class) | |
886 | continue; | |
887 | if (timer1->card && timer->card) { | |
888 | if (timer1->card->number > timer->card->number) | |
889 | break; | |
890 | if (timer1->card->number < timer->card->number) | |
891 | continue; | |
892 | } | |
893 | if (timer1->tmr_device > timer->tmr_device) | |
894 | break; | |
895 | if (timer1->tmr_device < timer->tmr_device) | |
896 | continue; | |
897 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
898 | break; | |
899 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
900 | continue; | |
901 | /* conflicts.. */ | |
1a60d4c5 | 902 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
903 | return -EBUSY; |
904 | } | |
9244b2c3 | 905 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 906 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
907 | return 0; |
908 | } | |
909 | ||
c461482c | 910 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 911 | { |
c461482c | 912 | struct snd_timer *timer = device->device_data; |
230323da TI |
913 | struct snd_timer_instance *ti; |
914 | ||
1a60d4c5 | 915 | mutex_lock(®ister_mutex); |
c461482c | 916 | list_del_init(&timer->device_list); |
230323da TI |
917 | /* wake up pending sleepers */ |
918 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
919 | if (ti->disconnect) |
920 | ti->disconnect(ti); | |
230323da | 921 | } |
1a60d4c5 | 922 | mutex_unlock(®ister_mutex); |
c461482c | 923 | return 0; |
1da177e4 LT |
924 | } |
925 | ||
53d2f744 | 926 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
927 | { |
928 | unsigned long flags; | |
929 | unsigned long resolution = 0; | |
53d2f744 | 930 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 931 | |
230323da TI |
932 | if (timer->card && timer->card->shutdown) |
933 | return; | |
7c22f1aa TI |
934 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
935 | return; | |
7eaa943c TI |
936 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
937 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
938 | return; | |
1da177e4 | 939 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
940 | if (event == SNDRV_TIMER_EVENT_MSTART || |
941 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
942 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
943 | if (timer->hw.c_resolution) |
944 | resolution = timer->hw.c_resolution(timer); | |
945 | else | |
946 | resolution = timer->hw.resolution; | |
947 | } | |
9244b2c3 | 948 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
949 | if (ti->ccallback) |
950 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 951 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
952 | if (ts->ccallback) |
953 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
954 | } |
955 | spin_unlock_irqrestore(&timer->lock, flags); | |
956 | } | |
957 | ||
958 | /* | |
959 | * exported functions for global timers | |
960 | */ | |
53d2f744 | 961 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 962 | { |
53d2f744 | 963 | struct snd_timer_id tid; |
6b172a85 | 964 | |
1da177e4 LT |
965 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
966 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
967 | tid.card = -1; | |
968 | tid.device = device; | |
969 | tid.subdevice = 0; | |
970 | return snd_timer_new(NULL, id, &tid, rtimer); | |
971 | } | |
972 | ||
53d2f744 | 973 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
974 | { |
975 | return snd_timer_free(timer); | |
976 | } | |
977 | ||
53d2f744 | 978 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 979 | { |
53d2f744 | 980 | struct snd_device dev; |
1da177e4 LT |
981 | |
982 | memset(&dev, 0, sizeof(dev)); | |
983 | dev.device_data = timer; | |
984 | return snd_timer_dev_register(&dev); | |
985 | } | |
986 | ||
6b172a85 | 987 | /* |
1da177e4 LT |
988 | * System timer |
989 | */ | |
990 | ||
991 | struct snd_timer_system_private { | |
992 | struct timer_list tlist; | |
1da177e4 LT |
993 | unsigned long last_expires; |
994 | unsigned long last_jiffies; | |
995 | unsigned long correction; | |
996 | }; | |
997 | ||
1da177e4 LT |
998 | static void snd_timer_s_function(unsigned long data) |
999 | { | |
53d2f744 | 1000 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
1001 | struct snd_timer_system_private *priv = timer->private_data; |
1002 | unsigned long jiff = jiffies; | |
1003 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1004 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1005 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1006 | } | |
1007 | ||
53d2f744 | 1008 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1009 | { |
1010 | struct snd_timer_system_private *priv; | |
1011 | unsigned long njiff; | |
1012 | ||
1013 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1014 | njiff = (priv->last_jiffies = jiffies); | |
1015 | if (priv->correction > timer->sticks - 1) { | |
1016 | priv->correction -= timer->sticks - 1; | |
1017 | njiff++; | |
1018 | } else { | |
1019 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1020 | priv->correction = 0; |
1da177e4 | 1021 | } |
4a07083e TI |
1022 | priv->last_expires = njiff; |
1023 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1024 | return 0; |
1025 | } | |
1026 | ||
53d2f744 | 1027 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1028 | { |
1029 | struct snd_timer_system_private *priv; | |
1030 | unsigned long jiff; | |
1031 | ||
1032 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1033 | del_timer(&priv->tlist); | |
1034 | jiff = jiffies; | |
1035 | if (time_before(jiff, priv->last_expires)) | |
1036 | timer->sticks = priv->last_expires - jiff; | |
1037 | else | |
1038 | timer->sticks = 1; | |
de2696d8 | 1039 | priv->correction = 0; |
1da177e4 LT |
1040 | return 0; |
1041 | } | |
1042 | ||
f146357f TI |
1043 | static int snd_timer_s_close(struct snd_timer *timer) |
1044 | { | |
1045 | struct snd_timer_system_private *priv; | |
1046 | ||
1047 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1048 | del_timer_sync(&priv->tlist); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
53d2f744 | 1052 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1053 | { |
1054 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1055 | .resolution = 1000000000L / HZ, | |
1056 | .ticks = 10000000L, | |
f146357f | 1057 | .close = snd_timer_s_close, |
1da177e4 LT |
1058 | .start = snd_timer_s_start, |
1059 | .stop = snd_timer_s_stop | |
1060 | }; | |
1061 | ||
53d2f744 | 1062 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1063 | { |
1064 | kfree(timer->private_data); | |
1065 | } | |
1066 | ||
1067 | static int snd_timer_register_system(void) | |
1068 | { | |
53d2f744 | 1069 | struct snd_timer *timer; |
1da177e4 LT |
1070 | struct snd_timer_system_private *priv; |
1071 | int err; | |
1072 | ||
6b172a85 CL |
1073 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1074 | if (err < 0) | |
1da177e4 LT |
1075 | return err; |
1076 | strcpy(timer->name, "system timer"); | |
1077 | timer->hw = snd_timer_system; | |
ca2c0966 | 1078 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1079 | if (priv == NULL) { |
1080 | snd_timer_free(timer); | |
1081 | return -ENOMEM; | |
1082 | } | |
f169c105 | 1083 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
1da177e4 LT |
1084 | timer->private_data = priv; |
1085 | timer->private_free = snd_timer_free_system; | |
1086 | return snd_timer_global_register(timer); | |
1087 | } | |
1088 | ||
cd6a6503 | 1089 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1090 | /* |
1091 | * Info interface | |
1092 | */ | |
1093 | ||
53d2f744 TI |
1094 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1095 | struct snd_info_buffer *buffer) | |
1da177e4 | 1096 | { |
53d2f744 TI |
1097 | struct snd_timer *timer; |
1098 | struct snd_timer_instance *ti; | |
1da177e4 | 1099 | |
1a60d4c5 | 1100 | mutex_lock(®ister_mutex); |
9244b2c3 | 1101 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1102 | if (timer->card && timer->card->shutdown) |
1103 | continue; | |
1da177e4 LT |
1104 | switch (timer->tmr_class) { |
1105 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1106 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1107 | break; | |
1108 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1109 | snd_iprintf(buffer, "C%i-%i: ", |
1110 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1111 | break; |
1112 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1113 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1114 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1115 | break; |
1116 | default: | |
6b172a85 CL |
1117 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1118 | timer->card ? timer->card->number : -1, | |
1119 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1120 | } |
1121 | snd_iprintf(buffer, "%s :", timer->name); | |
1122 | if (timer->hw.resolution) | |
6b172a85 CL |
1123 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1124 | timer->hw.resolution / 1000, | |
1125 | timer->hw.resolution % 1000, | |
1126 | timer->hw.ticks); | |
1da177e4 LT |
1127 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1128 | snd_iprintf(buffer, " SLAVE"); | |
1129 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1130 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1131 | snd_iprintf(buffer, " Client %s : %s\n", |
1132 | ti->owner ? ti->owner : "unknown", | |
1133 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1134 | SNDRV_TIMER_IFLG_RUNNING) | |
1135 | ? "running" : "stopped"); | |
1da177e4 | 1136 | } |
1a60d4c5 | 1137 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1138 | } |
1139 | ||
6581f4e7 | 1140 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1141 | |
1142 | static void __init snd_timer_proc_init(void) | |
1143 | { | |
1144 | struct snd_info_entry *entry; | |
1145 | ||
1146 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1147 | if (entry != NULL) { | |
e28563cc TI |
1148 | entry->c.text.read = snd_timer_proc_read; |
1149 | if (snd_info_register(entry) < 0) { | |
1150 | snd_info_free_entry(entry); | |
1151 | entry = NULL; | |
1152 | } | |
1153 | } | |
1154 | snd_timer_proc_entry = entry; | |
1155 | } | |
1156 | ||
1157 | static void __exit snd_timer_proc_done(void) | |
1158 | { | |
746d4a02 | 1159 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1160 | } |
cd6a6503 | 1161 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1162 | #define snd_timer_proc_init() |
1163 | #define snd_timer_proc_done() | |
1164 | #endif | |
1165 | ||
1da177e4 LT |
1166 | /* |
1167 | * USER SPACE interface | |
1168 | */ | |
1169 | ||
53d2f744 | 1170 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1171 | unsigned long resolution, |
1172 | unsigned long ticks) | |
1173 | { | |
53d2f744 TI |
1174 | struct snd_timer_user *tu = timeri->callback_data; |
1175 | struct snd_timer_read *r; | |
1da177e4 | 1176 | int prev; |
6b172a85 | 1177 | |
1da177e4 LT |
1178 | spin_lock(&tu->qlock); |
1179 | if (tu->qused > 0) { | |
1180 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1181 | r = &tu->queue[prev]; | |
1182 | if (r->resolution == resolution) { | |
1183 | r->ticks += ticks; | |
1184 | goto __wake; | |
1185 | } | |
1186 | } | |
1187 | if (tu->qused >= tu->queue_size) { | |
1188 | tu->overrun++; | |
1189 | } else { | |
1190 | r = &tu->queue[tu->qtail++]; | |
1191 | tu->qtail %= tu->queue_size; | |
1192 | r->resolution = resolution; | |
1193 | r->ticks = ticks; | |
1194 | tu->qused++; | |
1195 | } | |
1196 | __wake: | |
1197 | spin_unlock(&tu->qlock); | |
1198 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1199 | wake_up(&tu->qchange_sleep); | |
1200 | } | |
1201 | ||
53d2f744 TI |
1202 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1203 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1204 | { |
1205 | if (tu->qused >= tu->queue_size) { | |
1206 | tu->overrun++; | |
1207 | } else { | |
1208 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1209 | tu->qtail %= tu->queue_size; | |
1210 | tu->qused++; | |
1211 | } | |
1212 | } | |
1213 | ||
53d2f744 TI |
1214 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1215 | int event, | |
1da177e4 LT |
1216 | struct timespec *tstamp, |
1217 | unsigned long resolution) | |
1218 | { | |
53d2f744 TI |
1219 | struct snd_timer_user *tu = timeri->callback_data; |
1220 | struct snd_timer_tread r1; | |
bfe70783 | 1221 | unsigned long flags; |
1da177e4 | 1222 | |
6b172a85 CL |
1223 | if (event >= SNDRV_TIMER_EVENT_START && |
1224 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1225 | tu->tstamp = *tstamp; |
1226 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1227 | return; | |
1228 | r1.event = event; | |
1229 | r1.tstamp = *tstamp; | |
1230 | r1.val = resolution; | |
bfe70783 | 1231 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1232 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1233 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1234 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1235 | wake_up(&tu->qchange_sleep); | |
1236 | } | |
1237 | ||
40ed9444 TI |
1238 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1239 | { | |
1240 | struct snd_timer_user *tu = timeri->callback_data; | |
1241 | ||
1242 | tu->disconnected = true; | |
1243 | wake_up(&tu->qchange_sleep); | |
1244 | } | |
1245 | ||
53d2f744 | 1246 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1247 | unsigned long resolution, |
1248 | unsigned long ticks) | |
1249 | { | |
53d2f744 TI |
1250 | struct snd_timer_user *tu = timeri->callback_data; |
1251 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1252 | struct timespec tstamp; |
1253 | int prev, append = 0; | |
1254 | ||
07799e75 | 1255 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1256 | spin_lock(&tu->qlock); |
6b172a85 CL |
1257 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1258 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1259 | spin_unlock(&tu->qlock); |
1260 | return; | |
1261 | } | |
b751eef1 JK |
1262 | if (tu->last_resolution != resolution || ticks > 0) { |
1263 | if (timer_tstamp_monotonic) | |
26204e04 | 1264 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1265 | else |
1266 | getnstimeofday(&tstamp); | |
1267 | } | |
6b172a85 CL |
1268 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1269 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1270 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1271 | r1.tstamp = tstamp; | |
1272 | r1.val = resolution; | |
1273 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1274 | tu->last_resolution = resolution; | |
1275 | append++; | |
1276 | } | |
1277 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1278 | goto __wake; | |
1279 | if (ticks == 0) | |
1280 | goto __wake; | |
1281 | if (tu->qused > 0) { | |
1282 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1283 | r = &tu->tqueue[prev]; | |
1284 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1285 | r->tstamp = tstamp; | |
1286 | r->val += ticks; | |
1287 | append++; | |
1288 | goto __wake; | |
1289 | } | |
1290 | } | |
1291 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1292 | r1.tstamp = tstamp; | |
1293 | r1.val = ticks; | |
1294 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1295 | append++; | |
1296 | __wake: | |
1297 | spin_unlock(&tu->qlock); | |
1298 | if (append == 0) | |
1299 | return; | |
1300 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1301 | wake_up(&tu->qchange_sleep); | |
1302 | } | |
1303 | ||
1304 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1305 | { | |
53d2f744 | 1306 | struct snd_timer_user *tu; |
02f4865f TI |
1307 | int err; |
1308 | ||
1309 | err = nonseekable_open(inode, file); | |
1310 | if (err < 0) | |
1311 | return err; | |
6b172a85 | 1312 | |
ca2c0966 | 1313 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1314 | if (tu == NULL) |
1315 | return -ENOMEM; | |
1316 | spin_lock_init(&tu->qlock); | |
1317 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1318 | mutex_init(&tu->ioctl_lock); |
1da177e4 LT |
1319 | tu->ticks = 1; |
1320 | tu->queue_size = 128; | |
53d2f744 | 1321 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1322 | GFP_KERNEL); |
1da177e4 LT |
1323 | if (tu->queue == NULL) { |
1324 | kfree(tu); | |
1325 | return -ENOMEM; | |
1326 | } | |
1327 | file->private_data = tu; | |
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1332 | { | |
53d2f744 | 1333 | struct snd_timer_user *tu; |
1da177e4 LT |
1334 | |
1335 | if (file->private_data) { | |
1336 | tu = file->private_data; | |
1337 | file->private_data = NULL; | |
af368027 | 1338 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1339 | if (tu->timeri) |
1340 | snd_timer_close(tu->timeri); | |
af368027 | 1341 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1342 | kfree(tu->queue); |
1343 | kfree(tu->tqueue); | |
1344 | kfree(tu); | |
1345 | } | |
1346 | return 0; | |
1347 | } | |
1348 | ||
53d2f744 | 1349 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1350 | { |
1351 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1352 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1353 | id->card = -1; | |
1354 | id->device = -1; | |
1355 | id->subdevice = -1; | |
1356 | } | |
1357 | ||
53d2f744 | 1358 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1359 | { |
1360 | id->dev_class = timer->tmr_class; | |
1361 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1362 | id->card = timer->card ? timer->card->number : -1; | |
1363 | id->device = timer->tmr_device; | |
1364 | id->subdevice = timer->tmr_subdevice; | |
1365 | } | |
1366 | ||
53d2f744 | 1367 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1368 | { |
53d2f744 TI |
1369 | struct snd_timer_id id; |
1370 | struct snd_timer *timer; | |
1da177e4 | 1371 | struct list_head *p; |
6b172a85 | 1372 | |
1da177e4 LT |
1373 | if (copy_from_user(&id, _tid, sizeof(id))) |
1374 | return -EFAULT; | |
1a60d4c5 | 1375 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1376 | if (id.dev_class < 0) { /* first item */ |
1377 | if (list_empty(&snd_timer_list)) | |
1378 | snd_timer_user_zero_id(&id); | |
1379 | else { | |
9dfba380 | 1380 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1381 | struct snd_timer, device_list); |
1da177e4 LT |
1382 | snd_timer_user_copy_id(&id, timer); |
1383 | } | |
1384 | } else { | |
1385 | switch (id.dev_class) { | |
1386 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1387 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1388 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1389 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1390 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1391 | snd_timer_user_copy_id(&id, timer); | |
1392 | break; | |
1393 | } | |
1394 | if (timer->tmr_device >= id.device) { | |
1395 | snd_timer_user_copy_id(&id, timer); | |
1396 | break; | |
1397 | } | |
1398 | } | |
1399 | if (p == &snd_timer_list) | |
1400 | snd_timer_user_zero_id(&id); | |
1401 | break; | |
1402 | case SNDRV_TIMER_CLASS_CARD: | |
1403 | case SNDRV_TIMER_CLASS_PCM: | |
1404 | if (id.card < 0) { | |
1405 | id.card = 0; | |
1406 | } else { | |
1407 | if (id.card < 0) { | |
1408 | id.card = 0; | |
1409 | } else { | |
1410 | if (id.device < 0) { | |
1411 | id.device = 0; | |
1412 | } else { | |
6b172a85 CL |
1413 | if (id.subdevice < 0) { |
1414 | id.subdevice = 0; | |
1415 | } else { | |
1416 | id.subdevice++; | |
1417 | } | |
1da177e4 LT |
1418 | } |
1419 | } | |
1420 | } | |
1421 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1422 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1423 | if (timer->tmr_class > id.dev_class) { |
1424 | snd_timer_user_copy_id(&id, timer); | |
1425 | break; | |
1426 | } | |
1427 | if (timer->tmr_class < id.dev_class) | |
1428 | continue; | |
1429 | if (timer->card->number > id.card) { | |
1430 | snd_timer_user_copy_id(&id, timer); | |
1431 | break; | |
1432 | } | |
1433 | if (timer->card->number < id.card) | |
1434 | continue; | |
1435 | if (timer->tmr_device > id.device) { | |
1436 | snd_timer_user_copy_id(&id, timer); | |
1437 | break; | |
1438 | } | |
1439 | if (timer->tmr_device < id.device) | |
1440 | continue; | |
1441 | if (timer->tmr_subdevice > id.subdevice) { | |
1442 | snd_timer_user_copy_id(&id, timer); | |
1443 | break; | |
1444 | } | |
1445 | if (timer->tmr_subdevice < id.subdevice) | |
1446 | continue; | |
1447 | snd_timer_user_copy_id(&id, timer); | |
1448 | break; | |
1449 | } | |
1450 | if (p == &snd_timer_list) | |
1451 | snd_timer_user_zero_id(&id); | |
1452 | break; | |
1453 | default: | |
1454 | snd_timer_user_zero_id(&id); | |
1455 | } | |
1456 | } | |
1a60d4c5 | 1457 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1458 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1459 | return -EFAULT; | |
1460 | return 0; | |
6b172a85 | 1461 | } |
1da177e4 | 1462 | |
6b172a85 | 1463 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1464 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1465 | { |
53d2f744 TI |
1466 | struct snd_timer_ginfo *ginfo; |
1467 | struct snd_timer_id tid; | |
1468 | struct snd_timer *t; | |
1da177e4 LT |
1469 | struct list_head *p; |
1470 | int err = 0; | |
1471 | ||
ef44a1ec LZ |
1472 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1473 | if (IS_ERR(ginfo)) | |
1474 | return PTR_ERR(ginfo); | |
1475 | ||
1da177e4 LT |
1476 | tid = ginfo->tid; |
1477 | memset(ginfo, 0, sizeof(*ginfo)); | |
1478 | ginfo->tid = tid; | |
1a60d4c5 | 1479 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1480 | t = snd_timer_find(&tid); |
1481 | if (t != NULL) { | |
1482 | ginfo->card = t->card ? t->card->number : -1; | |
1483 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1484 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1485 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1486 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1487 | ginfo->resolution = t->hw.resolution; | |
1488 | if (t->hw.resolution_min > 0) { | |
1489 | ginfo->resolution_min = t->hw.resolution_min; | |
1490 | ginfo->resolution_max = t->hw.resolution_max; | |
1491 | } | |
1492 | list_for_each(p, &t->open_list_head) { | |
1493 | ginfo->clients++; | |
1494 | } | |
1495 | } else { | |
1496 | err = -ENODEV; | |
1497 | } | |
1a60d4c5 | 1498 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1499 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1500 | err = -EFAULT; | |
1501 | kfree(ginfo); | |
1502 | return err; | |
1503 | } | |
1504 | ||
91d2178e | 1505 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1506 | { |
53d2f744 | 1507 | struct snd_timer *t; |
1da177e4 LT |
1508 | int err; |
1509 | ||
1a60d4c5 | 1510 | mutex_lock(®ister_mutex); |
91d2178e | 1511 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1512 | if (!t) { |
1da177e4 | 1513 | err = -ENODEV; |
6b172a85 CL |
1514 | goto _error; |
1515 | } | |
1516 | if (!list_empty(&t->open_list_head)) { | |
1517 | err = -EBUSY; | |
1518 | goto _error; | |
1519 | } | |
1520 | if (!t->hw.set_period) { | |
1521 | err = -ENOSYS; | |
1522 | goto _error; | |
1da177e4 | 1523 | } |
91d2178e | 1524 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1525 | _error: |
1a60d4c5 | 1526 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1527 | return err; |
1528 | } | |
1529 | ||
91d2178e TS |
1530 | static int snd_timer_user_gparams(struct file *file, |
1531 | struct snd_timer_gparams __user *_gparams) | |
1532 | { | |
1533 | struct snd_timer_gparams gparams; | |
1534 | ||
1535 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1536 | return -EFAULT; | |
1537 | return timer_set_gparams(&gparams); | |
1538 | } | |
1539 | ||
6b172a85 | 1540 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1541 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1542 | { |
53d2f744 TI |
1543 | struct snd_timer_gstatus gstatus; |
1544 | struct snd_timer_id tid; | |
1545 | struct snd_timer *t; | |
1da177e4 LT |
1546 | int err = 0; |
1547 | ||
1548 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1549 | return -EFAULT; | |
1550 | tid = gstatus.tid; | |
1551 | memset(&gstatus, 0, sizeof(gstatus)); | |
1552 | gstatus.tid = tid; | |
1a60d4c5 | 1553 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1554 | t = snd_timer_find(&tid); |
1555 | if (t != NULL) { | |
1556 | if (t->hw.c_resolution) | |
1557 | gstatus.resolution = t->hw.c_resolution(t); | |
1558 | else | |
1559 | gstatus.resolution = t->hw.resolution; | |
1560 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1561 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1562 | &gstatus.resolution_den); | |
1da177e4 LT |
1563 | } else { |
1564 | gstatus.resolution_num = gstatus.resolution; | |
1565 | gstatus.resolution_den = 1000000000uL; | |
1566 | } | |
1567 | } else { | |
1568 | err = -ENODEV; | |
1569 | } | |
1a60d4c5 | 1570 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1571 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1572 | err = -EFAULT; | |
1573 | return err; | |
1574 | } | |
1575 | ||
6b172a85 | 1576 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1577 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1578 | { |
53d2f744 TI |
1579 | struct snd_timer_user *tu; |
1580 | struct snd_timer_select tselect; | |
1da177e4 | 1581 | char str[32]; |
c1935b4d | 1582 | int err = 0; |
6b172a85 | 1583 | |
1da177e4 | 1584 | tu = file->private_data; |
c1935b4d | 1585 | if (tu->timeri) { |
1da177e4 | 1586 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1587 | tu->timeri = NULL; |
1588 | } | |
1589 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1590 | err = -EFAULT; | |
1591 | goto __err; | |
1592 | } | |
1da177e4 LT |
1593 | sprintf(str, "application %i", current->pid); |
1594 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1595 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1596 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1597 | if (err < 0) | |
c1935b4d | 1598 | goto __err; |
1da177e4 | 1599 | |
4d572776 JJ |
1600 | kfree(tu->queue); |
1601 | tu->queue = NULL; | |
1602 | kfree(tu->tqueue); | |
1603 | tu->tqueue = NULL; | |
1da177e4 | 1604 | if (tu->tread) { |
53d2f744 | 1605 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1606 | GFP_KERNEL); |
c1935b4d JK |
1607 | if (tu->tqueue == NULL) |
1608 | err = -ENOMEM; | |
1da177e4 | 1609 | } else { |
53d2f744 | 1610 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1611 | GFP_KERNEL); |
c1935b4d JK |
1612 | if (tu->queue == NULL) |
1613 | err = -ENOMEM; | |
1da177e4 | 1614 | } |
6b172a85 | 1615 | |
c1935b4d JK |
1616 | if (err < 0) { |
1617 | snd_timer_close(tu->timeri); | |
1618 | tu->timeri = NULL; | |
1619 | } else { | |
1620 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1621 | tu->timeri->callback = tu->tread |
1622 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1623 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1624 | tu->timeri->callback_data = (void *)tu; | |
40ed9444 | 1625 | tu->timeri->disconnect = snd_timer_user_disconnect; |
c1935b4d JK |
1626 | } |
1627 | ||
1628 | __err: | |
c1935b4d | 1629 | return err; |
1da177e4 LT |
1630 | } |
1631 | ||
6b172a85 | 1632 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1633 | struct snd_timer_info __user *_info) |
1da177e4 | 1634 | { |
53d2f744 TI |
1635 | struct snd_timer_user *tu; |
1636 | struct snd_timer_info *info; | |
1637 | struct snd_timer *t; | |
1da177e4 LT |
1638 | int err = 0; |
1639 | ||
1640 | tu = file->private_data; | |
7c64ec34 CL |
1641 | if (!tu->timeri) |
1642 | return -EBADFD; | |
1da177e4 | 1643 | t = tu->timeri->timer; |
7c64ec34 CL |
1644 | if (!t) |
1645 | return -EBADFD; | |
1da177e4 | 1646 | |
ca2c0966 | 1647 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1648 | if (! info) |
1649 | return -ENOMEM; | |
1650 | info->card = t->card ? t->card->number : -1; | |
1651 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1652 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1653 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1654 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1655 | info->resolution = t->hw.resolution; | |
1656 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1657 | err = -EFAULT; | |
1658 | kfree(info); | |
1659 | return err; | |
1660 | } | |
1661 | ||
6b172a85 | 1662 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1663 | struct snd_timer_params __user *_params) |
1da177e4 | 1664 | { |
53d2f744 TI |
1665 | struct snd_timer_user *tu; |
1666 | struct snd_timer_params params; | |
1667 | struct snd_timer *t; | |
1668 | struct snd_timer_read *tr; | |
1669 | struct snd_timer_tread *ttr; | |
1da177e4 | 1670 | int err; |
6b172a85 | 1671 | |
1da177e4 | 1672 | tu = file->private_data; |
7c64ec34 CL |
1673 | if (!tu->timeri) |
1674 | return -EBADFD; | |
1da177e4 | 1675 | t = tu->timeri->timer; |
7c64ec34 CL |
1676 | if (!t) |
1677 | return -EBADFD; | |
1da177e4 LT |
1678 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1679 | return -EFAULT; | |
1680 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1681 | err = -EINVAL; | |
1682 | goto _end; | |
1683 | } | |
6b172a85 CL |
1684 | if (params.queue_size > 0 && |
1685 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1686 | err = -EINVAL; |
1687 | goto _end; | |
1688 | } | |
1689 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1690 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1691 | (1<<SNDRV_TIMER_EVENT_START)| | |
1692 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1693 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1694 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1695 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1696 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1697 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1698 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1699 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1700 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1701 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1702 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1703 | err = -EINVAL; |
1704 | goto _end; | |
1705 | } | |
1706 | snd_timer_stop(tu->timeri); | |
1707 | spin_lock_irq(&t->lock); | |
1708 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1709 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1710 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1711 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1712 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1713 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1714 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1715 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1716 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1717 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1718 | if (params.queue_size > 0 && |
1719 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1720 | if (tu->tread) { |
6b172a85 CL |
1721 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1722 | GFP_KERNEL); | |
1da177e4 LT |
1723 | if (ttr) { |
1724 | kfree(tu->tqueue); | |
1725 | tu->queue_size = params.queue_size; | |
1726 | tu->tqueue = ttr; | |
1727 | } | |
1728 | } else { | |
6b172a85 CL |
1729 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1730 | GFP_KERNEL); | |
1da177e4 LT |
1731 | if (tr) { |
1732 | kfree(tu->queue); | |
1733 | tu->queue_size = params.queue_size; | |
1734 | tu->queue = tr; | |
1735 | } | |
1736 | } | |
1737 | } | |
1738 | tu->qhead = tu->qtail = tu->qused = 0; | |
1739 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1740 | if (tu->tread) { | |
53d2f744 | 1741 | struct snd_timer_tread tread; |
1da177e4 LT |
1742 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1743 | tread.tstamp.tv_sec = 0; | |
1744 | tread.tstamp.tv_nsec = 0; | |
1745 | tread.val = 0; | |
1746 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1747 | } else { | |
53d2f744 | 1748 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1749 | r->resolution = 0; |
1750 | r->ticks = 0; | |
1751 | tu->qused++; | |
1752 | tu->qtail++; | |
1753 | } | |
1da177e4 LT |
1754 | } |
1755 | tu->filter = params.filter; | |
1756 | tu->ticks = params.ticks; | |
1757 | err = 0; | |
1758 | _end: | |
1759 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1760 | return -EFAULT; | |
1761 | return err; | |
1762 | } | |
1763 | ||
6b172a85 | 1764 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1765 | struct snd_timer_status __user *_status) |
1da177e4 | 1766 | { |
53d2f744 TI |
1767 | struct snd_timer_user *tu; |
1768 | struct snd_timer_status status; | |
6b172a85 | 1769 | |
1da177e4 | 1770 | tu = file->private_data; |
7c64ec34 CL |
1771 | if (!tu->timeri) |
1772 | return -EBADFD; | |
1da177e4 LT |
1773 | memset(&status, 0, sizeof(status)); |
1774 | status.tstamp = tu->tstamp; | |
1775 | status.resolution = snd_timer_resolution(tu->timeri); | |
1776 | status.lost = tu->timeri->lost; | |
1777 | status.overrun = tu->overrun; | |
1778 | spin_lock_irq(&tu->qlock); | |
1779 | status.queue = tu->qused; | |
1780 | spin_unlock_irq(&tu->qlock); | |
1781 | if (copy_to_user(_status, &status, sizeof(status))) | |
1782 | return -EFAULT; | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | static int snd_timer_user_start(struct file *file) | |
1787 | { | |
1788 | int err; | |
53d2f744 | 1789 | struct snd_timer_user *tu; |
6b172a85 | 1790 | |
1da177e4 | 1791 | tu = file->private_data; |
7c64ec34 CL |
1792 | if (!tu->timeri) |
1793 | return -EBADFD; | |
1da177e4 LT |
1794 | snd_timer_stop(tu->timeri); |
1795 | tu->timeri->lost = 0; | |
1796 | tu->last_resolution = 0; | |
1797 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1798 | } | |
1799 | ||
1800 | static int snd_timer_user_stop(struct file *file) | |
1801 | { | |
1802 | int err; | |
53d2f744 | 1803 | struct snd_timer_user *tu; |
6b172a85 | 1804 | |
1da177e4 | 1805 | tu = file->private_data; |
7c64ec34 CL |
1806 | if (!tu->timeri) |
1807 | return -EBADFD; | |
1da177e4 LT |
1808 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1809 | } | |
1810 | ||
1811 | static int snd_timer_user_continue(struct file *file) | |
1812 | { | |
1813 | int err; | |
53d2f744 | 1814 | struct snd_timer_user *tu; |
6b172a85 | 1815 | |
1da177e4 | 1816 | tu = file->private_data; |
7c64ec34 CL |
1817 | if (!tu->timeri) |
1818 | return -EBADFD; | |
1da177e4 LT |
1819 | tu->timeri->lost = 0; |
1820 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1821 | } | |
1822 | ||
15790a6b TI |
1823 | static int snd_timer_user_pause(struct file *file) |
1824 | { | |
1825 | int err; | |
53d2f744 | 1826 | struct snd_timer_user *tu; |
6b172a85 | 1827 | |
15790a6b | 1828 | tu = file->private_data; |
7c64ec34 CL |
1829 | if (!tu->timeri) |
1830 | return -EBADFD; | |
d138b445 | 1831 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1832 | } |
1833 | ||
8c50b37c TI |
1834 | enum { |
1835 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1836 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1837 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1838 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1839 | }; | |
1840 | ||
af368027 | 1841 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1842 | unsigned long arg) |
1da177e4 | 1843 | { |
53d2f744 | 1844 | struct snd_timer_user *tu; |
1da177e4 LT |
1845 | void __user *argp = (void __user *)arg; |
1846 | int __user *p = argp; | |
6b172a85 | 1847 | |
1da177e4 LT |
1848 | tu = file->private_data; |
1849 | switch (cmd) { | |
1850 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1851 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1852 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1853 | return snd_timer_user_next_device(argp); | |
1854 | case SNDRV_TIMER_IOCTL_TREAD: | |
1855 | { | |
1856 | int xarg; | |
6b172a85 | 1857 | |
af368027 | 1858 | if (tu->timeri) /* too late */ |
1da177e4 | 1859 | return -EBUSY; |
af368027 | 1860 | if (get_user(xarg, p)) |
1da177e4 LT |
1861 | return -EFAULT; |
1862 | tu->tread = xarg ? 1 : 0; | |
1863 | return 0; | |
1864 | } | |
1865 | case SNDRV_TIMER_IOCTL_GINFO: | |
1866 | return snd_timer_user_ginfo(file, argp); | |
1867 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1868 | return snd_timer_user_gparams(file, argp); | |
1869 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1870 | return snd_timer_user_gstatus(file, argp); | |
1871 | case SNDRV_TIMER_IOCTL_SELECT: | |
1872 | return snd_timer_user_tselect(file, argp); | |
1873 | case SNDRV_TIMER_IOCTL_INFO: | |
1874 | return snd_timer_user_info(file, argp); | |
1875 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1876 | return snd_timer_user_params(file, argp); | |
1877 | case SNDRV_TIMER_IOCTL_STATUS: | |
1878 | return snd_timer_user_status(file, argp); | |
1879 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1880 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1881 | return snd_timer_user_start(file); |
1882 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1883 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1884 | return snd_timer_user_stop(file); |
1885 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1886 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1887 | return snd_timer_user_continue(file); |
15790a6b | 1888 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1889 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1890 | return snd_timer_user_pause(file); |
1da177e4 LT |
1891 | } |
1892 | return -ENOTTY; | |
1893 | } | |
1894 | ||
af368027 TI |
1895 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1896 | unsigned long arg) | |
1897 | { | |
1898 | struct snd_timer_user *tu = file->private_data; | |
1899 | long ret; | |
1900 | ||
1901 | mutex_lock(&tu->ioctl_lock); | |
1902 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
1903 | mutex_unlock(&tu->ioctl_lock); | |
1904 | return ret; | |
1905 | } | |
1906 | ||
1da177e4 LT |
1907 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
1908 | { | |
53d2f744 | 1909 | struct snd_timer_user *tu; |
6b172a85 | 1910 | |
1da177e4 | 1911 | tu = file->private_data; |
60aa4924 | 1912 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
1913 | } |
1914 | ||
6b172a85 CL |
1915 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1916 | size_t count, loff_t *offset) | |
1da177e4 | 1917 | { |
53d2f744 | 1918 | struct snd_timer_user *tu; |
1da177e4 | 1919 | long result = 0, unit; |
4dff5c7b | 1920 | int qhead; |
1da177e4 | 1921 | int err = 0; |
6b172a85 | 1922 | |
1da177e4 | 1923 | tu = file->private_data; |
53d2f744 | 1924 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1925 | spin_lock_irq(&tu->qlock); |
1926 | while ((long)count - result >= unit) { | |
1927 | while (!tu->qused) { | |
1928 | wait_queue_t wait; | |
1929 | ||
1930 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1931 | err = -EAGAIN; | |
4dff5c7b | 1932 | goto _error; |
1da177e4 LT |
1933 | } |
1934 | ||
1935 | set_current_state(TASK_INTERRUPTIBLE); | |
1936 | init_waitqueue_entry(&wait, current); | |
1937 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1938 | ||
1939 | spin_unlock_irq(&tu->qlock); | |
1940 | schedule(); | |
1941 | spin_lock_irq(&tu->qlock); | |
1942 | ||
1943 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1944 | ||
230323da TI |
1945 | if (tu->disconnected) { |
1946 | err = -ENODEV; | |
4dff5c7b | 1947 | goto _error; |
230323da | 1948 | } |
1da177e4 LT |
1949 | if (signal_pending(current)) { |
1950 | err = -ERESTARTSYS; | |
4dff5c7b | 1951 | goto _error; |
1da177e4 LT |
1952 | } |
1953 | } | |
1954 | ||
4dff5c7b TI |
1955 | qhead = tu->qhead++; |
1956 | tu->qhead %= tu->queue_size; | |
1da177e4 | 1957 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1958 | |
1959 | if (tu->tread) { | |
4dff5c7b TI |
1960 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
1961 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 1962 | err = -EFAULT; |
1da177e4 | 1963 | } else { |
4dff5c7b TI |
1964 | if (copy_to_user(buffer, &tu->queue[qhead], |
1965 | sizeof(struct snd_timer_read))) | |
1da177e4 | 1966 | err = -EFAULT; |
1da177e4 LT |
1967 | } |
1968 | ||
1da177e4 LT |
1969 | spin_lock_irq(&tu->qlock); |
1970 | tu->qused--; | |
4dff5c7b TI |
1971 | if (err < 0) |
1972 | goto _error; | |
1973 | result += unit; | |
1974 | buffer += unit; | |
1da177e4 | 1975 | } |
1da177e4 | 1976 | _error: |
4dff5c7b | 1977 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1978 | return result > 0 ? result : err; |
1979 | } | |
1980 | ||
1981 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1982 | { | |
1983 | unsigned int mask; | |
53d2f744 | 1984 | struct snd_timer_user *tu; |
1da177e4 LT |
1985 | |
1986 | tu = file->private_data; | |
1987 | ||
1988 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1989 | |
1da177e4 LT |
1990 | mask = 0; |
1991 | if (tu->qused) | |
1992 | mask |= POLLIN | POLLRDNORM; | |
230323da TI |
1993 | if (tu->disconnected) |
1994 | mask |= POLLERR; | |
1da177e4 LT |
1995 | |
1996 | return mask; | |
1997 | } | |
1998 | ||
1999 | #ifdef CONFIG_COMPAT | |
2000 | #include "timer_compat.c" | |
2001 | #else | |
2002 | #define snd_timer_user_ioctl_compat NULL | |
2003 | #endif | |
2004 | ||
9c2e08c5 | 2005 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2006 | { |
2007 | .owner = THIS_MODULE, | |
2008 | .read = snd_timer_user_read, | |
2009 | .open = snd_timer_user_open, | |
2010 | .release = snd_timer_user_release, | |
02f4865f | 2011 | .llseek = no_llseek, |
1da177e4 LT |
2012 | .poll = snd_timer_user_poll, |
2013 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2014 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2015 | .fasync = snd_timer_user_fasync, | |
2016 | }; | |
2017 | ||
7c35860d TI |
2018 | /* unregister the system timer */ |
2019 | static void snd_timer_free_all(void) | |
2020 | { | |
2021 | struct snd_timer *timer, *n; | |
2022 | ||
2023 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2024 | snd_timer_free(timer); | |
2025 | } | |
2026 | ||
89da061f TI |
2027 | static struct device timer_dev; |
2028 | ||
1da177e4 LT |
2029 | /* |
2030 | * ENTRY functions | |
2031 | */ | |
2032 | ||
1da177e4 LT |
2033 | static int __init alsa_timer_init(void) |
2034 | { | |
2035 | int err; | |
1da177e4 | 2036 | |
89da061f TI |
2037 | snd_device_initialize(&timer_dev, NULL); |
2038 | dev_set_name(&timer_dev, "timer"); | |
2039 | ||
1da177e4 | 2040 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2041 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2042 | "system timer"); | |
1da177e4 | 2043 | #endif |
e28563cc | 2044 | |
7c35860d TI |
2045 | err = snd_timer_register_system(); |
2046 | if (err < 0) { | |
cf74dcf3 | 2047 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
89da061f | 2048 | put_device(&timer_dev); |
7c35860d TI |
2049 | return err; |
2050 | } | |
2051 | ||
40a4b263 TI |
2052 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2053 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2054 | if (err < 0) { |
cf74dcf3 | 2055 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2056 | snd_timer_free_all(); |
89da061f | 2057 | put_device(&timer_dev); |
7c35860d TI |
2058 | return err; |
2059 | } | |
2060 | ||
e28563cc | 2061 | snd_timer_proc_init(); |
1da177e4 LT |
2062 | return 0; |
2063 | } | |
2064 | ||
2065 | static void __exit alsa_timer_exit(void) | |
2066 | { | |
40a4b263 | 2067 | snd_unregister_device(&timer_dev); |
7c35860d | 2068 | snd_timer_free_all(); |
89da061f | 2069 | put_device(&timer_dev); |
e28563cc | 2070 | snd_timer_proc_done(); |
1da177e4 LT |
2071 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2072 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2073 | #endif | |
2074 | } | |
2075 | ||
2076 | module_init(alsa_timer_init) | |
2077 | module_exit(alsa_timer_exit) | |
2078 | ||
2079 | EXPORT_SYMBOL(snd_timer_open); | |
2080 | EXPORT_SYMBOL(snd_timer_close); | |
2081 | EXPORT_SYMBOL(snd_timer_resolution); | |
2082 | EXPORT_SYMBOL(snd_timer_start); | |
2083 | EXPORT_SYMBOL(snd_timer_stop); | |
2084 | EXPORT_SYMBOL(snd_timer_continue); | |
2085 | EXPORT_SYMBOL(snd_timer_pause); | |
2086 | EXPORT_SYMBOL(snd_timer_new); | |
2087 | EXPORT_SYMBOL(snd_timer_notify); | |
2088 | EXPORT_SYMBOL(snd_timer_global_new); | |
2089 | EXPORT_SYMBOL(snd_timer_global_free); | |
2090 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 2091 | EXPORT_SYMBOL(snd_timer_interrupt); |