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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/init.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
65a77217 | 28 | #include <linux/module.h> |
543537bd | 29 | #include <linux/string.h> |
174cd4b1 | 30 | #include <linux/sched/signal.h> |
1da177e4 LT |
31 | #include <sound/core.h> |
32 | #include <sound/timer.h> | |
33 | #include <sound/control.h> | |
34 | #include <sound/info.h> | |
35 | #include <sound/minors.h> | |
36 | #include <sound/initval.h> | |
37 | #include <linux/kmod.h> | |
1da177e4 | 38 | |
9f8a7658 TI |
39 | /* internal flags */ |
40 | #define SNDRV_TIMER_IFLG_PAUSED 0x00010000 | |
41 | ||
8eeaa2f9 | 42 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
109fef9e | 43 | #define DEFAULT_TIMER_LIMIT 4 |
1da177e4 LT |
44 | #else |
45 | #define DEFAULT_TIMER_LIMIT 1 | |
46 | #endif | |
47 | ||
48 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 49 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 50 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
51 | MODULE_DESCRIPTION("ALSA timer interface"); |
52 | MODULE_LICENSE("GPL"); | |
53 | module_param(timer_limit, int, 0444); | |
54 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
55 | module_param(timer_tstamp_monotonic, int, 0444); |
56 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 57 | |
03cfe6f5 KS |
58 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
59 | MODULE_ALIAS("devname:snd/timer"); | |
60 | ||
53d2f744 TI |
61 | struct snd_timer_user { |
62 | struct snd_timer_instance *timeri; | |
6b172a85 | 63 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
64 | unsigned long ticks; |
65 | unsigned long overrun; | |
66 | int qhead; | |
67 | int qtail; | |
68 | int qused; | |
69 | int queue_size; | |
230323da | 70 | bool disconnected; |
53d2f744 TI |
71 | struct snd_timer_read *queue; |
72 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
73 | spinlock_t qlock; |
74 | unsigned long last_resolution; | |
75 | unsigned int filter; | |
76 | struct timespec tstamp; /* trigger tstamp */ | |
77 | wait_queue_head_t qchange_sleep; | |
78 | struct fasync_struct *fasync; | |
af368027 | 79 | struct mutex ioctl_lock; |
53d2f744 | 80 | }; |
1da177e4 LT |
81 | |
82 | /* list of timers */ | |
83 | static LIST_HEAD(snd_timer_list); | |
84 | ||
85 | /* list of slave instances */ | |
86 | static LIST_HEAD(snd_timer_slave_list); | |
87 | ||
88 | /* lock for slave active lists */ | |
89 | static DEFINE_SPINLOCK(slave_active_lock); | |
90 | ||
1a60d4c5 | 91 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 92 | |
53d2f744 TI |
93 | static int snd_timer_free(struct snd_timer *timer); |
94 | static int snd_timer_dev_free(struct snd_device *device); | |
95 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 96 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 97 | |
53d2f744 | 98 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
99 | |
100 | /* | |
101 | * create a timer instance with the given owner string. | |
102 | * when timer is not NULL, increments the module counter | |
103 | */ | |
53d2f744 TI |
104 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
105 | struct snd_timer *timer) | |
1da177e4 | 106 | { |
53d2f744 | 107 | struct snd_timer_instance *timeri; |
ca2c0966 | 108 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
109 | if (timeri == NULL) |
110 | return NULL; | |
543537bd | 111 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
112 | if (! timeri->owner) { |
113 | kfree(timeri); | |
114 | return NULL; | |
115 | } | |
116 | INIT_LIST_HEAD(&timeri->open_list); | |
117 | INIT_LIST_HEAD(&timeri->active_list); | |
118 | INIT_LIST_HEAD(&timeri->ack_list); | |
119 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
120 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
121 | ||
122 | timeri->timer = timer; | |
de24214d | 123 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
124 | kfree(timeri->owner); |
125 | kfree(timeri); | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | return timeri; | |
130 | } | |
131 | ||
132 | /* | |
133 | * find a timer instance from the given timer id | |
134 | */ | |
53d2f744 | 135 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 136 | { |
53d2f744 | 137 | struct snd_timer *timer = NULL; |
1da177e4 | 138 | |
9244b2c3 | 139 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
140 | if (timer->tmr_class != tid->dev_class) |
141 | continue; | |
142 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
143 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
144 | (timer->card == NULL || | |
145 | timer->card->number != tid->card)) | |
146 | continue; | |
147 | if (timer->tmr_device != tid->device) | |
148 | continue; | |
149 | if (timer->tmr_subdevice != tid->subdevice) | |
150 | continue; | |
151 | return timer; | |
152 | } | |
153 | return NULL; | |
154 | } | |
155 | ||
ee2da997 | 156 | #ifdef CONFIG_MODULES |
1da177e4 | 157 | |
53d2f744 | 158 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 159 | { |
1da177e4 LT |
160 | switch (tid->dev_class) { |
161 | case SNDRV_TIMER_CLASS_GLOBAL: | |
162 | if (tid->device < timer_limit) | |
163 | request_module("snd-timer-%i", tid->device); | |
164 | break; | |
165 | case SNDRV_TIMER_CLASS_CARD: | |
166 | case SNDRV_TIMER_CLASS_PCM: | |
167 | if (tid->card < snd_ecards_limit) | |
168 | request_module("snd-card-%i", tid->card); | |
169 | break; | |
170 | default: | |
171 | break; | |
172 | } | |
173 | } | |
174 | ||
175 | #endif | |
176 | ||
177 | /* | |
178 | * look for a master instance matching with the slave id of the given slave. | |
179 | * when found, relink the open_link of the slave. | |
180 | * | |
181 | * call this with register_mutex down. | |
182 | */ | |
9b7d869e | 183 | static int snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 184 | { |
53d2f744 TI |
185 | struct snd_timer *timer; |
186 | struct snd_timer_instance *master; | |
1da177e4 LT |
187 | |
188 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
189 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
190 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
191 | if (slave->slave_class == master->slave_class && |
192 | slave->slave_id == master->slave_id) { | |
9b7d869e TI |
193 | if (master->timer->num_instances >= |
194 | master->timer->max_instances) | |
195 | return -EBUSY; | |
5b7c757d NK |
196 | list_move_tail(&slave->open_list, |
197 | &master->slave_list_head); | |
9b7d869e | 198 | master->timer->num_instances++; |
1da177e4 LT |
199 | spin_lock_irq(&slave_active_lock); |
200 | slave->master = master; | |
201 | slave->timer = master->timer; | |
202 | spin_unlock_irq(&slave_active_lock); | |
9b7d869e | 203 | return 0; |
1da177e4 LT |
204 | } |
205 | } | |
206 | } | |
9b7d869e | 207 | return 0; |
1da177e4 LT |
208 | } |
209 | ||
210 | /* | |
211 | * look for slave instances matching with the slave id of the given master. | |
212 | * when found, relink the open_link of slaves. | |
213 | * | |
214 | * call this with register_mutex down. | |
215 | */ | |
9b7d869e | 216 | static int snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 217 | { |
9244b2c3 | 218 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
219 | |
220 | /* check all pending slaves */ | |
9244b2c3 | 221 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
222 | if (slave->slave_class == master->slave_class && |
223 | slave->slave_id == master->slave_id) { | |
9b7d869e TI |
224 | if (master->timer->num_instances >= |
225 | master->timer->max_instances) | |
226 | return -EBUSY; | |
9244b2c3 | 227 | list_move_tail(&slave->open_list, &master->slave_list_head); |
9b7d869e | 228 | master->timer->num_instances++; |
1da177e4 | 229 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 230 | spin_lock(&master->timer->lock); |
1da177e4 LT |
231 | slave->master = master; |
232 | slave->timer = master->timer; | |
233 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
234 | list_add_tail(&slave->active_list, |
235 | &master->slave_active_head); | |
b5a663aa | 236 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
237 | spin_unlock_irq(&slave_active_lock); |
238 | } | |
239 | } | |
9b7d869e | 240 | return 0; |
1da177e4 LT |
241 | } |
242 | ||
9b7d869e TI |
243 | static int snd_timer_close_locked(struct snd_timer_instance *timeri); |
244 | ||
1da177e4 LT |
245 | /* |
246 | * open a timer instance | |
247 | * when opening a master, the slave id must be here given. | |
248 | */ | |
53d2f744 TI |
249 | int snd_timer_open(struct snd_timer_instance **ti, |
250 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
251 | unsigned int slave_id) |
252 | { | |
53d2f744 TI |
253 | struct snd_timer *timer; |
254 | struct snd_timer_instance *timeri = NULL; | |
9b7d869e | 255 | int err; |
6b172a85 | 256 | |
1da177e4 LT |
257 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
258 | /* open a slave instance */ | |
259 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
260 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
261 | pr_debug("ALSA: timer: invalid slave class %i\n", |
262 | tid->dev_sclass); | |
1da177e4 LT |
263 | return -EINVAL; |
264 | } | |
1a60d4c5 | 265 | mutex_lock(®ister_mutex); |
1da177e4 | 266 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 267 | if (!timeri) { |
1a60d4c5 | 268 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
269 | return -ENOMEM; |
270 | } | |
1da177e4 LT |
271 | timeri->slave_class = tid->dev_sclass; |
272 | timeri->slave_id = tid->device; | |
273 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
274 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
9b7d869e TI |
275 | err = snd_timer_check_slave(timeri); |
276 | if (err < 0) { | |
277 | snd_timer_close_locked(timeri); | |
278 | timeri = NULL; | |
279 | } | |
1a60d4c5 | 280 | mutex_unlock(®ister_mutex); |
1da177e4 | 281 | *ti = timeri; |
9b7d869e | 282 | return err; |
1da177e4 LT |
283 | } |
284 | ||
285 | /* open a master instance */ | |
1a60d4c5 | 286 | mutex_lock(®ister_mutex); |
1da177e4 | 287 | timer = snd_timer_find(tid); |
ee2da997 JB |
288 | #ifdef CONFIG_MODULES |
289 | if (!timer) { | |
1a60d4c5 | 290 | mutex_unlock(®ister_mutex); |
1da177e4 | 291 | snd_timer_request(tid); |
1a60d4c5 | 292 | mutex_lock(®ister_mutex); |
1da177e4 LT |
293 | timer = snd_timer_find(tid); |
294 | } | |
295 | #endif | |
2fd43d11 | 296 | if (!timer) { |
1a60d4c5 | 297 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
298 | return -ENODEV; |
299 | } | |
2fd43d11 CL |
300 | if (!list_empty(&timer->open_list_head)) { |
301 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 302 | struct snd_timer_instance, open_list); |
2fd43d11 | 303 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 304 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
305 | return -EBUSY; |
306 | } | |
307 | } | |
9b7d869e TI |
308 | if (timer->num_instances >= timer->max_instances) { |
309 | mutex_unlock(®ister_mutex); | |
310 | return -EBUSY; | |
311 | } | |
2fd43d11 CL |
312 | timeri = snd_timer_instance_new(owner, timer); |
313 | if (!timeri) { | |
1a60d4c5 | 314 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
315 | return -ENOMEM; |
316 | } | |
230323da TI |
317 | /* take a card refcount for safe disconnection */ |
318 | if (timer->card) | |
319 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
320 | timeri->slave_class = tid->dev_sclass; |
321 | timeri->slave_id = slave_id; | |
8ddc0563 VN |
322 | |
323 | if (list_empty(&timer->open_list_head) && timer->hw.open) { | |
324 | int err = timer->hw.open(timer); | |
325 | if (err) { | |
326 | kfree(timeri->owner); | |
327 | kfree(timeri); | |
328 | ||
329 | if (timer->card) | |
330 | put_device(&timer->card->card_dev); | |
331 | module_put(timer->module); | |
332 | mutex_unlock(®ister_mutex); | |
333 | return err; | |
334 | } | |
335 | } | |
336 | ||
2fd43d11 | 337 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
9b7d869e TI |
338 | timer->num_instances++; |
339 | err = snd_timer_check_master(timeri); | |
340 | if (err < 0) { | |
341 | snd_timer_close_locked(timeri); | |
342 | timeri = NULL; | |
343 | } | |
1a60d4c5 | 344 | mutex_unlock(®ister_mutex); |
1da177e4 | 345 | *ti = timeri; |
9b7d869e | 346 | return err; |
1da177e4 | 347 | } |
98856392 | 348 | EXPORT_SYMBOL(snd_timer_open); |
1da177e4 | 349 | |
1da177e4 LT |
350 | /* |
351 | * close a timer instance | |
9b7d869e | 352 | * call this with register_mutex down. |
1da177e4 | 353 | */ |
9b7d869e | 354 | static int snd_timer_close_locked(struct snd_timer_instance *timeri) |
1da177e4 | 355 | { |
53d2f744 | 356 | struct snd_timer *timer = NULL; |
9244b2c3 | 357 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 358 | |
9984d1b5 TI |
359 | list_del(&timeri->open_list); |
360 | ||
1da177e4 LT |
361 | /* force to stop the timer */ |
362 | snd_timer_stop(timeri); | |
363 | ||
9984d1b5 TI |
364 | timer = timeri->timer; |
365 | if (timer) { | |
9b7d869e | 366 | timer->num_instances--; |
1da177e4 LT |
367 | /* wait, until the active callback is finished */ |
368 | spin_lock_irq(&timer->lock); | |
369 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
370 | spin_unlock_irq(&timer->lock); | |
371 | udelay(10); | |
372 | spin_lock_irq(&timer->lock); | |
373 | } | |
374 | spin_unlock_irq(&timer->lock); | |
9984d1b5 | 375 | |
1da177e4 | 376 | /* remove slave links */ |
b5a663aa TI |
377 | spin_lock_irq(&slave_active_lock); |
378 | spin_lock(&timer->lock); | |
9244b2c3 JB |
379 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
380 | open_list) { | |
9244b2c3 | 381 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
9b7d869e | 382 | timer->num_instances--; |
1da177e4 LT |
383 | slave->master = NULL; |
384 | slave->timer = NULL; | |
b5a663aa TI |
385 | list_del_init(&slave->ack_list); |
386 | list_del_init(&slave->active_list); | |
1da177e4 | 387 | } |
b5a663aa TI |
388 | spin_unlock(&timer->lock); |
389 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
390 | |
391 | /* slave doesn't need to release timer resources below */ | |
392 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
393 | timer = NULL; | |
1da177e4 | 394 | } |
9984d1b5 | 395 | |
1da177e4 LT |
396 | if (timeri->private_free) |
397 | timeri->private_free(timeri); | |
398 | kfree(timeri->owner); | |
399 | kfree(timeri); | |
9984d1b5 TI |
400 | |
401 | if (timer) { | |
402 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
403 | timer->hw.close(timer); | |
404 | /* release a card refcount for safe disconnection */ | |
405 | if (timer->card) | |
406 | put_device(&timer->card->card_dev); | |
de24214d | 407 | module_put(timer->module); |
9984d1b5 TI |
408 | } |
409 | ||
1da177e4 LT |
410 | return 0; |
411 | } | |
9b7d869e TI |
412 | |
413 | /* | |
414 | * close a timer instance | |
415 | */ | |
416 | int snd_timer_close(struct snd_timer_instance *timeri) | |
417 | { | |
418 | int err; | |
419 | ||
420 | if (snd_BUG_ON(!timeri)) | |
421 | return -ENXIO; | |
422 | ||
423 | mutex_lock(®ister_mutex); | |
424 | err = snd_timer_close_locked(timeri); | |
425 | mutex_unlock(®ister_mutex); | |
426 | return err; | |
427 | } | |
98856392 | 428 | EXPORT_SYMBOL(snd_timer_close); |
1da177e4 | 429 | |
53d2f744 | 430 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 431 | { |
53d2f744 | 432 | struct snd_timer * timer; |
1da177e4 LT |
433 | |
434 | if (timeri == NULL) | |
435 | return 0; | |
dd1f7ab8 ME |
436 | timer = timeri->timer; |
437 | if (timer) { | |
1da177e4 LT |
438 | if (timer->hw.c_resolution) |
439 | return timer->hw.c_resolution(timer); | |
440 | return timer->hw.resolution; | |
441 | } | |
442 | return 0; | |
443 | } | |
98856392 | 444 | EXPORT_SYMBOL(snd_timer_resolution); |
1da177e4 | 445 | |
53d2f744 | 446 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 447 | { |
53d2f744 | 448 | struct snd_timer *timer; |
1da177e4 | 449 | unsigned long resolution = 0; |
53d2f744 | 450 | struct snd_timer_instance *ts; |
1da177e4 LT |
451 | struct timespec tstamp; |
452 | ||
b751eef1 | 453 | if (timer_tstamp_monotonic) |
26204e04 | 454 | ktime_get_ts(&tstamp); |
b751eef1 JK |
455 | else |
456 | getnstimeofday(&tstamp); | |
7eaa943c TI |
457 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
458 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
459 | return; | |
6b172a85 CL |
460 | if (event == SNDRV_TIMER_EVENT_START || |
461 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
462 | resolution = snd_timer_resolution(ti); |
463 | if (ti->ccallback) | |
b30477d5 | 464 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
465 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
466 | return; | |
467 | timer = ti->timer; | |
468 | if (timer == NULL) | |
469 | return; | |
470 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
471 | return; | |
9244b2c3 | 472 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 473 | if (ts->ccallback) |
117159f0 | 474 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
475 | } |
476 | ||
f65e0d29 TI |
477 | /* start/continue a master timer */ |
478 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
479 | bool start, unsigned long ticks) | |
1da177e4 | 480 | { |
f65e0d29 TI |
481 | struct snd_timer *timer; |
482 | int result; | |
483 | unsigned long flags; | |
484 | ||
485 | timer = timeri->timer; | |
486 | if (!timer) | |
487 | return -EINVAL; | |
488 | ||
489 | spin_lock_irqsave(&timer->lock, flags); | |
490 | if (timer->card && timer->card->shutdown) { | |
491 | result = -ENODEV; | |
492 | goto unlock; | |
493 | } | |
494 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
495 | SNDRV_TIMER_IFLG_START)) { | |
496 | result = -EBUSY; | |
497 | goto unlock; | |
498 | } | |
499 | ||
500 | if (start) | |
501 | timeri->ticks = timeri->cticks = ticks; | |
502 | else if (!timeri->cticks) | |
503 | timeri->cticks = 1; | |
504 | timeri->pticks = 0; | |
505 | ||
5b7c757d | 506 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
507 | if (timer->running) { |
508 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
509 | goto __start_now; | |
510 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
511 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 512 | result = 1; /* delayed start */ |
1da177e4 | 513 | } else { |
f65e0d29 TI |
514 | if (start) |
515 | timer->sticks = ticks; | |
1da177e4 LT |
516 | timer->hw.start(timer); |
517 | __start_now: | |
518 | timer->running++; | |
519 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 520 | result = 0; |
1da177e4 | 521 | } |
f65e0d29 TI |
522 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
523 | SNDRV_TIMER_EVENT_CONTINUE); | |
524 | unlock: | |
525 | spin_unlock_irqrestore(&timer->lock, flags); | |
526 | return result; | |
1da177e4 LT |
527 | } |
528 | ||
f65e0d29 TI |
529 | /* start/continue a slave timer */ |
530 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
531 | bool start) | |
1da177e4 LT |
532 | { |
533 | unsigned long flags; | |
534 | ||
535 | spin_lock_irqsave(&slave_active_lock, flags); | |
f784beb7 TI |
536 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
537 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
538 | return -EBUSY; | |
539 | } | |
1da177e4 | 540 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
541 | if (timeri->master && timeri->timer) { |
542 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
543 | list_add_tail(&timeri->active_list, |
544 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
545 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
546 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
547 | spin_unlock(&timeri->timer->lock); |
548 | } | |
1da177e4 LT |
549 | spin_unlock_irqrestore(&slave_active_lock, flags); |
550 | return 1; /* delayed start */ | |
551 | } | |
552 | ||
f65e0d29 TI |
553 | /* stop/pause a master timer */ |
554 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 555 | { |
53d2f744 | 556 | struct snd_timer *timer; |
f65e0d29 | 557 | int result = 0; |
1da177e4 LT |
558 | unsigned long flags; |
559 | ||
1da177e4 LT |
560 | timer = timeri->timer; |
561 | if (!timer) | |
562 | return -EINVAL; | |
563 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
564 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
565 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
566 | result = -EBUSY; |
567 | goto unlock; | |
f784beb7 | 568 | } |
1da177e4 LT |
569 | list_del_init(&timeri->ack_list); |
570 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
571 | if (timer->card && timer->card->shutdown) |
572 | goto unlock; | |
573 | if (stop) { | |
574 | timeri->cticks = timeri->ticks; | |
575 | timeri->pticks = 0; | |
230323da | 576 | } |
1da177e4 LT |
577 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
578 | !(--timer->running)) { | |
579 | timer->hw.stop(timer); | |
580 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
581 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
582 | snd_timer_reschedule(timer, 0); | |
583 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
584 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
585 | timer->hw.start(timer); | |
586 | } | |
587 | } | |
588 | } | |
c3b16813 | 589 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
9f8a7658 TI |
590 | if (stop) |
591 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; | |
592 | else | |
593 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; | |
f65e0d29 | 594 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
837603d5 | 595 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 | 596 | unlock: |
1da177e4 | 597 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
598 | return result; |
599 | } | |
600 | ||
601 | /* stop/pause a slave timer */ | |
602 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
603 | { | |
604 | unsigned long flags; | |
605 | ||
606 | spin_lock_irqsave(&slave_active_lock, flags); | |
607 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
608 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
609 | return -EBUSY; | |
610 | } | |
611 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
612 | if (timeri->timer) { | |
613 | spin_lock(&timeri->timer->lock); | |
614 | list_del_init(&timeri->ack_list); | |
615 | list_del_init(&timeri->active_list); | |
616 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
837603d5 | 617 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 TI |
618 | spin_unlock(&timeri->timer->lock); |
619 | } | |
620 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
621 | return 0; |
622 | } | |
623 | ||
f65e0d29 TI |
624 | /* |
625 | * start the timer instance | |
626 | */ | |
627 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
628 | { | |
629 | if (timeri == NULL || ticks < 1) | |
630 | return -EINVAL; | |
631 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
632 | return snd_timer_start_slave(timeri, true); | |
633 | else | |
634 | return snd_timer_start1(timeri, true, ticks); | |
635 | } | |
98856392 | 636 | EXPORT_SYMBOL(snd_timer_start); |
f65e0d29 | 637 | |
1da177e4 LT |
638 | /* |
639 | * stop the timer instance. | |
640 | * | |
641 | * do not call this from the timer callback! | |
642 | */ | |
53d2f744 | 643 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 644 | { |
f65e0d29 TI |
645 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
646 | return snd_timer_stop_slave(timeri, true); | |
647 | else | |
648 | return snd_timer_stop1(timeri, true); | |
1da177e4 | 649 | } |
98856392 | 650 | EXPORT_SYMBOL(snd_timer_stop); |
1da177e4 LT |
651 | |
652 | /* | |
653 | * start again.. the tick is kept. | |
654 | */ | |
53d2f744 | 655 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 656 | { |
9f8a7658 TI |
657 | /* timer can continue only after pause */ |
658 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
659 | return -EINVAL; | |
660 | ||
1da177e4 | 661 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
662 | return snd_timer_start_slave(timeri, false); |
663 | else | |
664 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 | 665 | } |
98856392 | 666 | EXPORT_SYMBOL(snd_timer_continue); |
1da177e4 LT |
667 | |
668 | /* | |
669 | * pause.. remember the ticks left | |
670 | */ | |
53d2f744 | 671 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 672 | { |
f65e0d29 TI |
673 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
674 | return snd_timer_stop_slave(timeri, false); | |
675 | else | |
676 | return snd_timer_stop1(timeri, false); | |
1da177e4 | 677 | } |
98856392 | 678 | EXPORT_SYMBOL(snd_timer_pause); |
1da177e4 LT |
679 | |
680 | /* | |
681 | * reschedule the timer | |
682 | * | |
683 | * start pending instances and check the scheduling ticks. | |
684 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
685 | */ | |
53d2f744 | 686 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 687 | { |
53d2f744 | 688 | struct snd_timer_instance *ti; |
1da177e4 | 689 | unsigned long ticks = ~0UL; |
1da177e4 | 690 | |
9244b2c3 | 691 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
692 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
693 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
694 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
695 | timer->running++; | |
696 | } | |
697 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
698 | if (ticks > ti->cticks) | |
699 | ticks = ti->cticks; | |
700 | } | |
701 | } | |
702 | if (ticks == ~0UL) { | |
703 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
704 | return; | |
705 | } | |
706 | if (ticks > timer->hw.ticks) | |
707 | ticks = timer->hw.ticks; | |
708 | if (ticks_left != ticks) | |
709 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
710 | timer->sticks = ticks; | |
711 | } | |
712 | ||
713 | /* | |
714 | * timer tasklet | |
715 | * | |
716 | */ | |
717 | static void snd_timer_tasklet(unsigned long arg) | |
718 | { | |
53d2f744 TI |
719 | struct snd_timer *timer = (struct snd_timer *) arg; |
720 | struct snd_timer_instance *ti; | |
1da177e4 LT |
721 | struct list_head *p; |
722 | unsigned long resolution, ticks; | |
2999ff5b | 723 | unsigned long flags; |
1da177e4 | 724 | |
230323da TI |
725 | if (timer->card && timer->card->shutdown) |
726 | return; | |
727 | ||
2999ff5b | 728 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
729 | /* now process all callbacks */ |
730 | while (!list_empty(&timer->sack_list_head)) { | |
731 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 732 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
733 | |
734 | /* remove from ack_list and make empty */ | |
735 | list_del_init(p); | |
6b172a85 | 736 | |
1da177e4 LT |
737 | ticks = ti->pticks; |
738 | ti->pticks = 0; | |
739 | resolution = ti->resolution; | |
740 | ||
741 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
742 | spin_unlock(&timer->lock); | |
743 | if (ti->callback) | |
744 | ti->callback(ti, resolution, ticks); | |
745 | spin_lock(&timer->lock); | |
746 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
747 | } | |
2999ff5b | 748 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
749 | } |
750 | ||
751 | /* | |
752 | * timer interrupt | |
753 | * | |
754 | * ticks_left is usually equal to timer->sticks. | |
755 | * | |
756 | */ | |
53d2f744 | 757 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 758 | { |
9244b2c3 | 759 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 760 | unsigned long resolution, ticks; |
9244b2c3 | 761 | struct list_head *p, *ack_list_head; |
b32425ac | 762 | unsigned long flags; |
1da177e4 LT |
763 | int use_tasklet = 0; |
764 | ||
765 | if (timer == NULL) | |
766 | return; | |
767 | ||
230323da TI |
768 | if (timer->card && timer->card->shutdown) |
769 | return; | |
770 | ||
b32425ac | 771 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
772 | |
773 | /* remember the current resolution */ | |
774 | if (timer->hw.c_resolution) | |
775 | resolution = timer->hw.c_resolution(timer); | |
776 | else | |
777 | resolution = timer->hw.resolution; | |
778 | ||
779 | /* loop for all active instances | |
9244b2c3 | 780 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
781 | * processed instance is relinked to done_list_head before the callback |
782 | * is called. | |
1da177e4 | 783 | */ |
9244b2c3 JB |
784 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
785 | active_list) { | |
1da177e4 LT |
786 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
787 | continue; | |
788 | ti->pticks += ticks_left; | |
789 | ti->resolution = resolution; | |
790 | if (ti->cticks < ticks_left) | |
791 | ti->cticks = 0; | |
792 | else | |
793 | ti->cticks -= ticks_left; | |
794 | if (ti->cticks) /* not expired */ | |
795 | continue; | |
796 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
797 | ti->cticks = ti->ticks; | |
798 | } else { | |
799 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
800 | --timer->running; |
801 | list_del_init(&ti->active_list); | |
1da177e4 | 802 | } |
6b172a85 CL |
803 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
804 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
805 | ack_list_head = &timer->ack_list_head; | |
806 | else | |
807 | ack_list_head = &timer->sack_list_head; | |
808 | if (list_empty(&ti->ack_list)) | |
809 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 810 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
811 | ts->pticks = ti->pticks; |
812 | ts->resolution = resolution; | |
6b172a85 CL |
813 | if (list_empty(&ts->ack_list)) |
814 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
815 | } |
816 | } | |
817 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 818 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
819 | if (timer->running) { |
820 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
821 | timer->hw.stop(timer); | |
822 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
823 | } | |
824 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
825 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
826 | /* restart timer */ | |
827 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
828 | timer->hw.start(timer); | |
829 | } | |
830 | } else { | |
831 | timer->hw.stop(timer); | |
832 | } | |
833 | ||
834 | /* now process all fast callbacks */ | |
835 | while (!list_empty(&timer->ack_list_head)) { | |
836 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 837 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 838 | |
1da177e4 LT |
839 | /* remove from ack_list and make empty */ |
840 | list_del_init(p); | |
6b172a85 | 841 | |
1da177e4 LT |
842 | ticks = ti->pticks; |
843 | ti->pticks = 0; | |
844 | ||
845 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
846 | spin_unlock(&timer->lock); | |
847 | if (ti->callback) | |
848 | ti->callback(ti, resolution, ticks); | |
849 | spin_lock(&timer->lock); | |
850 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
851 | } | |
852 | ||
853 | /* do we have any slow callbacks? */ | |
854 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 855 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
856 | |
857 | if (use_tasklet) | |
1f04128a | 858 | tasklet_schedule(&timer->task_queue); |
1da177e4 | 859 | } |
98856392 | 860 | EXPORT_SYMBOL(snd_timer_interrupt); |
1da177e4 LT |
861 | |
862 | /* | |
863 | ||
864 | */ | |
865 | ||
53d2f744 TI |
866 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
867 | struct snd_timer **rtimer) | |
1da177e4 | 868 | { |
53d2f744 | 869 | struct snd_timer *timer; |
1da177e4 | 870 | int err; |
53d2f744 | 871 | static struct snd_device_ops ops = { |
1da177e4 LT |
872 | .dev_free = snd_timer_dev_free, |
873 | .dev_register = snd_timer_dev_register, | |
c461482c | 874 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
875 | }; |
876 | ||
7eaa943c TI |
877 | if (snd_BUG_ON(!tid)) |
878 | return -EINVAL; | |
879 | if (rtimer) | |
880 | *rtimer = NULL; | |
ca2c0966 | 881 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 882 | if (!timer) |
1da177e4 LT |
883 | return -ENOMEM; |
884 | timer->tmr_class = tid->dev_class; | |
885 | timer->card = card; | |
886 | timer->tmr_device = tid->device; | |
887 | timer->tmr_subdevice = tid->subdevice; | |
888 | if (id) | |
889 | strlcpy(timer->id, id, sizeof(timer->id)); | |
6b760bb2 | 890 | timer->sticks = 1; |
1da177e4 LT |
891 | INIT_LIST_HEAD(&timer->device_list); |
892 | INIT_LIST_HEAD(&timer->open_list_head); | |
893 | INIT_LIST_HEAD(&timer->active_list_head); | |
894 | INIT_LIST_HEAD(&timer->ack_list_head); | |
895 | INIT_LIST_HEAD(&timer->sack_list_head); | |
896 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
897 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
898 | (unsigned long)timer); | |
9b7d869e | 899 | timer->max_instances = 1000; /* default limit per timer */ |
1da177e4 | 900 | if (card != NULL) { |
de24214d | 901 | timer->module = card->module; |
6b172a85 CL |
902 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
903 | if (err < 0) { | |
1da177e4 LT |
904 | snd_timer_free(timer); |
905 | return err; | |
906 | } | |
907 | } | |
7eaa943c TI |
908 | if (rtimer) |
909 | *rtimer = timer; | |
1da177e4 LT |
910 | return 0; |
911 | } | |
98856392 | 912 | EXPORT_SYMBOL(snd_timer_new); |
1da177e4 | 913 | |
53d2f744 | 914 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 915 | { |
7eaa943c TI |
916 | if (!timer) |
917 | return 0; | |
c461482c TI |
918 | |
919 | mutex_lock(®ister_mutex); | |
920 | if (! list_empty(&timer->open_list_head)) { | |
921 | struct list_head *p, *n; | |
922 | struct snd_timer_instance *ti; | |
cf74dcf3 | 923 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
924 | list_for_each_safe(p, n, &timer->open_list_head) { |
925 | list_del_init(p); | |
926 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
927 | ti->timer = NULL; | |
928 | } | |
929 | } | |
930 | list_del(&timer->device_list); | |
931 | mutex_unlock(®ister_mutex); | |
932 | ||
1da177e4 LT |
933 | if (timer->private_free) |
934 | timer->private_free(timer); | |
935 | kfree(timer); | |
936 | return 0; | |
937 | } | |
938 | ||
53d2f744 | 939 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 940 | { |
53d2f744 | 941 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
942 | return snd_timer_free(timer); |
943 | } | |
944 | ||
53d2f744 | 945 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 946 | { |
53d2f744 TI |
947 | struct snd_timer *timer = dev->device_data; |
948 | struct snd_timer *timer1; | |
1da177e4 | 949 | |
7eaa943c TI |
950 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
951 | return -ENXIO; | |
1da177e4 LT |
952 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
953 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
954 | return -EINVAL; | |
955 | ||
1a60d4c5 | 956 | mutex_lock(®ister_mutex); |
9244b2c3 | 957 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
958 | if (timer1->tmr_class > timer->tmr_class) |
959 | break; | |
960 | if (timer1->tmr_class < timer->tmr_class) | |
961 | continue; | |
962 | if (timer1->card && timer->card) { | |
963 | if (timer1->card->number > timer->card->number) | |
964 | break; | |
965 | if (timer1->card->number < timer->card->number) | |
966 | continue; | |
967 | } | |
968 | if (timer1->tmr_device > timer->tmr_device) | |
969 | break; | |
970 | if (timer1->tmr_device < timer->tmr_device) | |
971 | continue; | |
972 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
973 | break; | |
974 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
975 | continue; | |
976 | /* conflicts.. */ | |
1a60d4c5 | 977 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
978 | return -EBUSY; |
979 | } | |
9244b2c3 | 980 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 981 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
982 | return 0; |
983 | } | |
984 | ||
c461482c | 985 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 986 | { |
c461482c | 987 | struct snd_timer *timer = device->device_data; |
230323da TI |
988 | struct snd_timer_instance *ti; |
989 | ||
1a60d4c5 | 990 | mutex_lock(®ister_mutex); |
c461482c | 991 | list_del_init(&timer->device_list); |
230323da TI |
992 | /* wake up pending sleepers */ |
993 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
994 | if (ti->disconnect) |
995 | ti->disconnect(ti); | |
230323da | 996 | } |
1a60d4c5 | 997 | mutex_unlock(®ister_mutex); |
c461482c | 998 | return 0; |
1da177e4 LT |
999 | } |
1000 | ||
53d2f744 | 1001 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
1002 | { |
1003 | unsigned long flags; | |
1004 | unsigned long resolution = 0; | |
53d2f744 | 1005 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 1006 | |
230323da TI |
1007 | if (timer->card && timer->card->shutdown) |
1008 | return; | |
7c22f1aa TI |
1009 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
1010 | return; | |
7eaa943c TI |
1011 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
1012 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
1013 | return; | |
1da177e4 | 1014 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
1015 | if (event == SNDRV_TIMER_EVENT_MSTART || |
1016 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
1017 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
1018 | if (timer->hw.c_resolution) |
1019 | resolution = timer->hw.c_resolution(timer); | |
1020 | else | |
1021 | resolution = timer->hw.resolution; | |
1022 | } | |
9244b2c3 | 1023 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
1024 | if (ti->ccallback) |
1025 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 1026 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
1027 | if (ts->ccallback) |
1028 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
1029 | } |
1030 | spin_unlock_irqrestore(&timer->lock, flags); | |
1031 | } | |
98856392 | 1032 | EXPORT_SYMBOL(snd_timer_notify); |
1da177e4 LT |
1033 | |
1034 | /* | |
1035 | * exported functions for global timers | |
1036 | */ | |
53d2f744 | 1037 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 1038 | { |
53d2f744 | 1039 | struct snd_timer_id tid; |
6b172a85 | 1040 | |
1da177e4 LT |
1041 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
1042 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1043 | tid.card = -1; | |
1044 | tid.device = device; | |
1045 | tid.subdevice = 0; | |
1046 | return snd_timer_new(NULL, id, &tid, rtimer); | |
1047 | } | |
98856392 | 1048 | EXPORT_SYMBOL(snd_timer_global_new); |
1da177e4 | 1049 | |
53d2f744 | 1050 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
1051 | { |
1052 | return snd_timer_free(timer); | |
1053 | } | |
98856392 | 1054 | EXPORT_SYMBOL(snd_timer_global_free); |
1da177e4 | 1055 | |
53d2f744 | 1056 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 1057 | { |
53d2f744 | 1058 | struct snd_device dev; |
1da177e4 LT |
1059 | |
1060 | memset(&dev, 0, sizeof(dev)); | |
1061 | dev.device_data = timer; | |
1062 | return snd_timer_dev_register(&dev); | |
1063 | } | |
98856392 | 1064 | EXPORT_SYMBOL(snd_timer_global_register); |
1da177e4 | 1065 | |
6b172a85 | 1066 | /* |
1da177e4 LT |
1067 | * System timer |
1068 | */ | |
1069 | ||
1070 | struct snd_timer_system_private { | |
1071 | struct timer_list tlist; | |
38e9a80f | 1072 | struct snd_timer *snd_timer; |
1da177e4 LT |
1073 | unsigned long last_expires; |
1074 | unsigned long last_jiffies; | |
1075 | unsigned long correction; | |
1076 | }; | |
1077 | ||
38e9a80f | 1078 | static void snd_timer_s_function(struct timer_list *t) |
1da177e4 | 1079 | { |
38e9a80f KC |
1080 | struct snd_timer_system_private *priv = from_timer(priv, t, |
1081 | tlist); | |
1082 | struct snd_timer *timer = priv->snd_timer; | |
1da177e4 LT |
1083 | unsigned long jiff = jiffies; |
1084 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1085 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1086 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1087 | } | |
1088 | ||
53d2f744 | 1089 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1090 | { |
1091 | struct snd_timer_system_private *priv; | |
1092 | unsigned long njiff; | |
1093 | ||
1094 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1095 | njiff = (priv->last_jiffies = jiffies); | |
1096 | if (priv->correction > timer->sticks - 1) { | |
1097 | priv->correction -= timer->sticks - 1; | |
1098 | njiff++; | |
1099 | } else { | |
1100 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1101 | priv->correction = 0; |
1da177e4 | 1102 | } |
4a07083e TI |
1103 | priv->last_expires = njiff; |
1104 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1105 | return 0; |
1106 | } | |
1107 | ||
53d2f744 | 1108 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1109 | { |
1110 | struct snd_timer_system_private *priv; | |
1111 | unsigned long jiff; | |
1112 | ||
1113 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1114 | del_timer(&priv->tlist); | |
1115 | jiff = jiffies; | |
1116 | if (time_before(jiff, priv->last_expires)) | |
1117 | timer->sticks = priv->last_expires - jiff; | |
1118 | else | |
1119 | timer->sticks = 1; | |
de2696d8 | 1120 | priv->correction = 0; |
1da177e4 LT |
1121 | return 0; |
1122 | } | |
1123 | ||
f146357f TI |
1124 | static int snd_timer_s_close(struct snd_timer *timer) |
1125 | { | |
1126 | struct snd_timer_system_private *priv; | |
1127 | ||
1128 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1129 | del_timer_sync(&priv->tlist); | |
1130 | return 0; | |
1131 | } | |
1132 | ||
53d2f744 | 1133 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1134 | { |
1135 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1136 | .resolution = 1000000000L / HZ, | |
1137 | .ticks = 10000000L, | |
f146357f | 1138 | .close = snd_timer_s_close, |
1da177e4 LT |
1139 | .start = snd_timer_s_start, |
1140 | .stop = snd_timer_s_stop | |
1141 | }; | |
1142 | ||
53d2f744 | 1143 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1144 | { |
1145 | kfree(timer->private_data); | |
1146 | } | |
1147 | ||
1148 | static int snd_timer_register_system(void) | |
1149 | { | |
53d2f744 | 1150 | struct snd_timer *timer; |
1da177e4 LT |
1151 | struct snd_timer_system_private *priv; |
1152 | int err; | |
1153 | ||
6b172a85 CL |
1154 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1155 | if (err < 0) | |
1da177e4 LT |
1156 | return err; |
1157 | strcpy(timer->name, "system timer"); | |
1158 | timer->hw = snd_timer_system; | |
ca2c0966 | 1159 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1160 | if (priv == NULL) { |
1161 | snd_timer_free(timer); | |
1162 | return -ENOMEM; | |
1163 | } | |
38e9a80f KC |
1164 | priv->snd_timer = timer; |
1165 | timer_setup(&priv->tlist, snd_timer_s_function, 0); | |
1da177e4 LT |
1166 | timer->private_data = priv; |
1167 | timer->private_free = snd_timer_free_system; | |
1168 | return snd_timer_global_register(timer); | |
1169 | } | |
1170 | ||
cd6a6503 | 1171 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1172 | /* |
1173 | * Info interface | |
1174 | */ | |
1175 | ||
53d2f744 TI |
1176 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1177 | struct snd_info_buffer *buffer) | |
1da177e4 | 1178 | { |
53d2f744 TI |
1179 | struct snd_timer *timer; |
1180 | struct snd_timer_instance *ti; | |
1da177e4 | 1181 | |
1a60d4c5 | 1182 | mutex_lock(®ister_mutex); |
9244b2c3 | 1183 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1184 | if (timer->card && timer->card->shutdown) |
1185 | continue; | |
1da177e4 LT |
1186 | switch (timer->tmr_class) { |
1187 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1188 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1189 | break; | |
1190 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1191 | snd_iprintf(buffer, "C%i-%i: ", |
1192 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1193 | break; |
1194 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1195 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1196 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1197 | break; |
1198 | default: | |
6b172a85 CL |
1199 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1200 | timer->card ? timer->card->number : -1, | |
1201 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1202 | } |
1203 | snd_iprintf(buffer, "%s :", timer->name); | |
1204 | if (timer->hw.resolution) | |
6b172a85 CL |
1205 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1206 | timer->hw.resolution / 1000, | |
1207 | timer->hw.resolution % 1000, | |
1208 | timer->hw.ticks); | |
1da177e4 LT |
1209 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1210 | snd_iprintf(buffer, " SLAVE"); | |
1211 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1212 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1213 | snd_iprintf(buffer, " Client %s : %s\n", |
1214 | ti->owner ? ti->owner : "unknown", | |
1215 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1216 | SNDRV_TIMER_IFLG_RUNNING) | |
1217 | ? "running" : "stopped"); | |
1da177e4 | 1218 | } |
1a60d4c5 | 1219 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1220 | } |
1221 | ||
6581f4e7 | 1222 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1223 | |
1224 | static void __init snd_timer_proc_init(void) | |
1225 | { | |
1226 | struct snd_info_entry *entry; | |
1227 | ||
1228 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1229 | if (entry != NULL) { | |
e28563cc TI |
1230 | entry->c.text.read = snd_timer_proc_read; |
1231 | if (snd_info_register(entry) < 0) { | |
1232 | snd_info_free_entry(entry); | |
1233 | entry = NULL; | |
1234 | } | |
1235 | } | |
1236 | snd_timer_proc_entry = entry; | |
1237 | } | |
1238 | ||
1239 | static void __exit snd_timer_proc_done(void) | |
1240 | { | |
746d4a02 | 1241 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1242 | } |
cd6a6503 | 1243 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1244 | #define snd_timer_proc_init() |
1245 | #define snd_timer_proc_done() | |
1246 | #endif | |
1247 | ||
1da177e4 LT |
1248 | /* |
1249 | * USER SPACE interface | |
1250 | */ | |
1251 | ||
53d2f744 | 1252 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1253 | unsigned long resolution, |
1254 | unsigned long ticks) | |
1255 | { | |
53d2f744 TI |
1256 | struct snd_timer_user *tu = timeri->callback_data; |
1257 | struct snd_timer_read *r; | |
1da177e4 | 1258 | int prev; |
6b172a85 | 1259 | |
1da177e4 LT |
1260 | spin_lock(&tu->qlock); |
1261 | if (tu->qused > 0) { | |
1262 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1263 | r = &tu->queue[prev]; | |
1264 | if (r->resolution == resolution) { | |
1265 | r->ticks += ticks; | |
1266 | goto __wake; | |
1267 | } | |
1268 | } | |
1269 | if (tu->qused >= tu->queue_size) { | |
1270 | tu->overrun++; | |
1271 | } else { | |
1272 | r = &tu->queue[tu->qtail++]; | |
1273 | tu->qtail %= tu->queue_size; | |
1274 | r->resolution = resolution; | |
1275 | r->ticks = ticks; | |
1276 | tu->qused++; | |
1277 | } | |
1278 | __wake: | |
1279 | spin_unlock(&tu->qlock); | |
1280 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1281 | wake_up(&tu->qchange_sleep); | |
1282 | } | |
1283 | ||
53d2f744 TI |
1284 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1285 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1286 | { |
1287 | if (tu->qused >= tu->queue_size) { | |
1288 | tu->overrun++; | |
1289 | } else { | |
1290 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1291 | tu->qtail %= tu->queue_size; | |
1292 | tu->qused++; | |
1293 | } | |
1294 | } | |
1295 | ||
53d2f744 TI |
1296 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1297 | int event, | |
1da177e4 LT |
1298 | struct timespec *tstamp, |
1299 | unsigned long resolution) | |
1300 | { | |
53d2f744 TI |
1301 | struct snd_timer_user *tu = timeri->callback_data; |
1302 | struct snd_timer_tread r1; | |
bfe70783 | 1303 | unsigned long flags; |
1da177e4 | 1304 | |
6b172a85 CL |
1305 | if (event >= SNDRV_TIMER_EVENT_START && |
1306 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1307 | tu->tstamp = *tstamp; |
1308 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1309 | return; | |
9a47e9cf | 1310 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1311 | r1.event = event; |
1312 | r1.tstamp = *tstamp; | |
1313 | r1.val = resolution; | |
bfe70783 | 1314 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1315 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1316 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1317 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1318 | wake_up(&tu->qchange_sleep); | |
1319 | } | |
1320 | ||
40ed9444 TI |
1321 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1322 | { | |
1323 | struct snd_timer_user *tu = timeri->callback_data; | |
1324 | ||
1325 | tu->disconnected = true; | |
1326 | wake_up(&tu->qchange_sleep); | |
1327 | } | |
1328 | ||
53d2f744 | 1329 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1330 | unsigned long resolution, |
1331 | unsigned long ticks) | |
1332 | { | |
53d2f744 TI |
1333 | struct snd_timer_user *tu = timeri->callback_data; |
1334 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1335 | struct timespec tstamp; |
1336 | int prev, append = 0; | |
1337 | ||
a8c006aa | 1338 | memset(&r1, 0, sizeof(r1)); |
07799e75 | 1339 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1340 | spin_lock(&tu->qlock); |
6b172a85 CL |
1341 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1342 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1343 | spin_unlock(&tu->qlock); |
1344 | return; | |
1345 | } | |
b751eef1 JK |
1346 | if (tu->last_resolution != resolution || ticks > 0) { |
1347 | if (timer_tstamp_monotonic) | |
26204e04 | 1348 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1349 | else |
1350 | getnstimeofday(&tstamp); | |
1351 | } | |
6b172a85 CL |
1352 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1353 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1354 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1355 | r1.tstamp = tstamp; | |
1356 | r1.val = resolution; | |
1357 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1358 | tu->last_resolution = resolution; | |
1359 | append++; | |
1360 | } | |
1361 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1362 | goto __wake; | |
1363 | if (ticks == 0) | |
1364 | goto __wake; | |
1365 | if (tu->qused > 0) { | |
1366 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1367 | r = &tu->tqueue[prev]; | |
1368 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1369 | r->tstamp = tstamp; | |
1370 | r->val += ticks; | |
1371 | append++; | |
1372 | goto __wake; | |
1373 | } | |
1374 | } | |
1375 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1376 | r1.tstamp = tstamp; | |
1377 | r1.val = ticks; | |
1378 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1379 | append++; | |
1380 | __wake: | |
1381 | spin_unlock(&tu->qlock); | |
1382 | if (append == 0) | |
1383 | return; | |
1384 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1385 | wake_up(&tu->qchange_sleep); | |
1386 | } | |
1387 | ||
890e2cb5 TI |
1388 | static int realloc_user_queue(struct snd_timer_user *tu, int size) |
1389 | { | |
1390 | struct snd_timer_read *queue = NULL; | |
1391 | struct snd_timer_tread *tqueue = NULL; | |
1392 | ||
1393 | if (tu->tread) { | |
1394 | tqueue = kcalloc(size, sizeof(*tqueue), GFP_KERNEL); | |
1395 | if (!tqueue) | |
1396 | return -ENOMEM; | |
1397 | } else { | |
1398 | queue = kcalloc(size, sizeof(*queue), GFP_KERNEL); | |
1399 | if (!queue) | |
1400 | return -ENOMEM; | |
1401 | } | |
1402 | ||
1403 | spin_lock_irq(&tu->qlock); | |
1404 | kfree(tu->queue); | |
1405 | kfree(tu->tqueue); | |
1406 | tu->queue_size = size; | |
1407 | tu->queue = queue; | |
1408 | tu->tqueue = tqueue; | |
1409 | tu->qhead = tu->qtail = tu->qused = 0; | |
1410 | spin_unlock_irq(&tu->qlock); | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1da177e4 LT |
1415 | static int snd_timer_user_open(struct inode *inode, struct file *file) |
1416 | { | |
53d2f744 | 1417 | struct snd_timer_user *tu; |
02f4865f TI |
1418 | int err; |
1419 | ||
1420 | err = nonseekable_open(inode, file); | |
1421 | if (err < 0) | |
1422 | return err; | |
6b172a85 | 1423 | |
ca2c0966 | 1424 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1425 | if (tu == NULL) |
1426 | return -ENOMEM; | |
1427 | spin_lock_init(&tu->qlock); | |
1428 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1429 | mutex_init(&tu->ioctl_lock); |
1da177e4 | 1430 | tu->ticks = 1; |
890e2cb5 | 1431 | if (realloc_user_queue(tu, 128) < 0) { |
1da177e4 LT |
1432 | kfree(tu); |
1433 | return -ENOMEM; | |
1434 | } | |
1435 | file->private_data = tu; | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1440 | { | |
53d2f744 | 1441 | struct snd_timer_user *tu; |
1da177e4 LT |
1442 | |
1443 | if (file->private_data) { | |
1444 | tu = file->private_data; | |
1445 | file->private_data = NULL; | |
af368027 | 1446 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1447 | if (tu->timeri) |
1448 | snd_timer_close(tu->timeri); | |
af368027 | 1449 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1450 | kfree(tu->queue); |
1451 | kfree(tu->tqueue); | |
1452 | kfree(tu); | |
1453 | } | |
1454 | return 0; | |
1455 | } | |
1456 | ||
53d2f744 | 1457 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1458 | { |
1459 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1460 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1461 | id->card = -1; | |
1462 | id->device = -1; | |
1463 | id->subdevice = -1; | |
1464 | } | |
1465 | ||
53d2f744 | 1466 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1467 | { |
1468 | id->dev_class = timer->tmr_class; | |
1469 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1470 | id->card = timer->card ? timer->card->number : -1; | |
1471 | id->device = timer->tmr_device; | |
1472 | id->subdevice = timer->tmr_subdevice; | |
1473 | } | |
1474 | ||
53d2f744 | 1475 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1476 | { |
53d2f744 TI |
1477 | struct snd_timer_id id; |
1478 | struct snd_timer *timer; | |
1da177e4 | 1479 | struct list_head *p; |
6b172a85 | 1480 | |
1da177e4 LT |
1481 | if (copy_from_user(&id, _tid, sizeof(id))) |
1482 | return -EFAULT; | |
1a60d4c5 | 1483 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1484 | if (id.dev_class < 0) { /* first item */ |
1485 | if (list_empty(&snd_timer_list)) | |
1486 | snd_timer_user_zero_id(&id); | |
1487 | else { | |
9dfba380 | 1488 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1489 | struct snd_timer, device_list); |
1da177e4 LT |
1490 | snd_timer_user_copy_id(&id, timer); |
1491 | } | |
1492 | } else { | |
1493 | switch (id.dev_class) { | |
1494 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1495 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1496 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1497 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1498 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1499 | snd_timer_user_copy_id(&id, timer); | |
1500 | break; | |
1501 | } | |
1502 | if (timer->tmr_device >= id.device) { | |
1503 | snd_timer_user_copy_id(&id, timer); | |
1504 | break; | |
1505 | } | |
1506 | } | |
1507 | if (p == &snd_timer_list) | |
1508 | snd_timer_user_zero_id(&id); | |
1509 | break; | |
1510 | case SNDRV_TIMER_CLASS_CARD: | |
1511 | case SNDRV_TIMER_CLASS_PCM: | |
1512 | if (id.card < 0) { | |
1513 | id.card = 0; | |
1514 | } else { | |
e8ed6820 DC |
1515 | if (id.device < 0) { |
1516 | id.device = 0; | |
1da177e4 | 1517 | } else { |
e8ed6820 DC |
1518 | if (id.subdevice < 0) |
1519 | id.subdevice = 0; | |
1520 | else | |
1521 | id.subdevice++; | |
1da177e4 LT |
1522 | } |
1523 | } | |
1524 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1525 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1526 | if (timer->tmr_class > id.dev_class) { |
1527 | snd_timer_user_copy_id(&id, timer); | |
1528 | break; | |
1529 | } | |
1530 | if (timer->tmr_class < id.dev_class) | |
1531 | continue; | |
1532 | if (timer->card->number > id.card) { | |
1533 | snd_timer_user_copy_id(&id, timer); | |
1534 | break; | |
1535 | } | |
1536 | if (timer->card->number < id.card) | |
1537 | continue; | |
1538 | if (timer->tmr_device > id.device) { | |
1539 | snd_timer_user_copy_id(&id, timer); | |
1540 | break; | |
1541 | } | |
1542 | if (timer->tmr_device < id.device) | |
1543 | continue; | |
1544 | if (timer->tmr_subdevice > id.subdevice) { | |
1545 | snd_timer_user_copy_id(&id, timer); | |
1546 | break; | |
1547 | } | |
1548 | if (timer->tmr_subdevice < id.subdevice) | |
1549 | continue; | |
1550 | snd_timer_user_copy_id(&id, timer); | |
1551 | break; | |
1552 | } | |
1553 | if (p == &snd_timer_list) | |
1554 | snd_timer_user_zero_id(&id); | |
1555 | break; | |
1556 | default: | |
1557 | snd_timer_user_zero_id(&id); | |
1558 | } | |
1559 | } | |
1a60d4c5 | 1560 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1561 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1562 | return -EFAULT; | |
1563 | return 0; | |
6b172a85 | 1564 | } |
1da177e4 | 1565 | |
6b172a85 | 1566 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1567 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1568 | { |
53d2f744 TI |
1569 | struct snd_timer_ginfo *ginfo; |
1570 | struct snd_timer_id tid; | |
1571 | struct snd_timer *t; | |
1da177e4 LT |
1572 | struct list_head *p; |
1573 | int err = 0; | |
1574 | ||
ef44a1ec LZ |
1575 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1576 | if (IS_ERR(ginfo)) | |
1577 | return PTR_ERR(ginfo); | |
1578 | ||
1da177e4 LT |
1579 | tid = ginfo->tid; |
1580 | memset(ginfo, 0, sizeof(*ginfo)); | |
1581 | ginfo->tid = tid; | |
1a60d4c5 | 1582 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1583 | t = snd_timer_find(&tid); |
1584 | if (t != NULL) { | |
1585 | ginfo->card = t->card ? t->card->number : -1; | |
1586 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1587 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1588 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1589 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1590 | ginfo->resolution = t->hw.resolution; | |
1591 | if (t->hw.resolution_min > 0) { | |
1592 | ginfo->resolution_min = t->hw.resolution_min; | |
1593 | ginfo->resolution_max = t->hw.resolution_max; | |
1594 | } | |
1595 | list_for_each(p, &t->open_list_head) { | |
1596 | ginfo->clients++; | |
1597 | } | |
1598 | } else { | |
1599 | err = -ENODEV; | |
1600 | } | |
1a60d4c5 | 1601 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1602 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1603 | err = -EFAULT; | |
1604 | kfree(ginfo); | |
1605 | return err; | |
1606 | } | |
1607 | ||
91d2178e | 1608 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1609 | { |
53d2f744 | 1610 | struct snd_timer *t; |
1da177e4 LT |
1611 | int err; |
1612 | ||
1a60d4c5 | 1613 | mutex_lock(®ister_mutex); |
91d2178e | 1614 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1615 | if (!t) { |
1da177e4 | 1616 | err = -ENODEV; |
6b172a85 CL |
1617 | goto _error; |
1618 | } | |
1619 | if (!list_empty(&t->open_list_head)) { | |
1620 | err = -EBUSY; | |
1621 | goto _error; | |
1622 | } | |
1623 | if (!t->hw.set_period) { | |
1624 | err = -ENOSYS; | |
1625 | goto _error; | |
1da177e4 | 1626 | } |
91d2178e | 1627 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1628 | _error: |
1a60d4c5 | 1629 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1630 | return err; |
1631 | } | |
1632 | ||
91d2178e TS |
1633 | static int snd_timer_user_gparams(struct file *file, |
1634 | struct snd_timer_gparams __user *_gparams) | |
1635 | { | |
1636 | struct snd_timer_gparams gparams; | |
1637 | ||
1638 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1639 | return -EFAULT; | |
1640 | return timer_set_gparams(&gparams); | |
1641 | } | |
1642 | ||
6b172a85 | 1643 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1644 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1645 | { |
53d2f744 TI |
1646 | struct snd_timer_gstatus gstatus; |
1647 | struct snd_timer_id tid; | |
1648 | struct snd_timer *t; | |
1da177e4 LT |
1649 | int err = 0; |
1650 | ||
1651 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1652 | return -EFAULT; | |
1653 | tid = gstatus.tid; | |
1654 | memset(&gstatus, 0, sizeof(gstatus)); | |
1655 | gstatus.tid = tid; | |
1a60d4c5 | 1656 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1657 | t = snd_timer_find(&tid); |
1658 | if (t != NULL) { | |
1659 | if (t->hw.c_resolution) | |
1660 | gstatus.resolution = t->hw.c_resolution(t); | |
1661 | else | |
1662 | gstatus.resolution = t->hw.resolution; | |
1663 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1664 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1665 | &gstatus.resolution_den); | |
1da177e4 LT |
1666 | } else { |
1667 | gstatus.resolution_num = gstatus.resolution; | |
1668 | gstatus.resolution_den = 1000000000uL; | |
1669 | } | |
1670 | } else { | |
1671 | err = -ENODEV; | |
1672 | } | |
1a60d4c5 | 1673 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1674 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1675 | err = -EFAULT; | |
1676 | return err; | |
1677 | } | |
1678 | ||
6b172a85 | 1679 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1680 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1681 | { |
53d2f744 TI |
1682 | struct snd_timer_user *tu; |
1683 | struct snd_timer_select tselect; | |
1da177e4 | 1684 | char str[32]; |
c1935b4d | 1685 | int err = 0; |
6b172a85 | 1686 | |
1da177e4 | 1687 | tu = file->private_data; |
c1935b4d | 1688 | if (tu->timeri) { |
1da177e4 | 1689 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1690 | tu->timeri = NULL; |
1691 | } | |
1692 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1693 | err = -EFAULT; | |
1694 | goto __err; | |
1695 | } | |
1da177e4 LT |
1696 | sprintf(str, "application %i", current->pid); |
1697 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1698 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1699 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1700 | if (err < 0) | |
c1935b4d | 1701 | goto __err; |
1da177e4 | 1702 | |
890e2cb5 TI |
1703 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; |
1704 | tu->timeri->callback = tu->tread | |
6b172a85 | 1705 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; |
890e2cb5 TI |
1706 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1707 | tu->timeri->callback_data = (void *)tu; | |
1708 | tu->timeri->disconnect = snd_timer_user_disconnect; | |
c1935b4d JK |
1709 | |
1710 | __err: | |
c1935b4d | 1711 | return err; |
1da177e4 LT |
1712 | } |
1713 | ||
6b172a85 | 1714 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1715 | struct snd_timer_info __user *_info) |
1da177e4 | 1716 | { |
53d2f744 TI |
1717 | struct snd_timer_user *tu; |
1718 | struct snd_timer_info *info; | |
1719 | struct snd_timer *t; | |
1da177e4 LT |
1720 | int err = 0; |
1721 | ||
1722 | tu = file->private_data; | |
7c64ec34 CL |
1723 | if (!tu->timeri) |
1724 | return -EBADFD; | |
1da177e4 | 1725 | t = tu->timeri->timer; |
7c64ec34 CL |
1726 | if (!t) |
1727 | return -EBADFD; | |
1da177e4 | 1728 | |
ca2c0966 | 1729 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1730 | if (! info) |
1731 | return -ENOMEM; | |
1732 | info->card = t->card ? t->card->number : -1; | |
1733 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1734 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1735 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1736 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1737 | info->resolution = t->hw.resolution; | |
1738 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1739 | err = -EFAULT; | |
1740 | kfree(info); | |
1741 | return err; | |
1742 | } | |
1743 | ||
6b172a85 | 1744 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1745 | struct snd_timer_params __user *_params) |
1da177e4 | 1746 | { |
53d2f744 TI |
1747 | struct snd_timer_user *tu; |
1748 | struct snd_timer_params params; | |
1749 | struct snd_timer *t; | |
1da177e4 | 1750 | int err; |
6b172a85 | 1751 | |
1da177e4 | 1752 | tu = file->private_data; |
7c64ec34 CL |
1753 | if (!tu->timeri) |
1754 | return -EBADFD; | |
1da177e4 | 1755 | t = tu->timeri->timer; |
7c64ec34 CL |
1756 | if (!t) |
1757 | return -EBADFD; | |
1da177e4 LT |
1758 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1759 | return -EFAULT; | |
71321eb3 TI |
1760 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { |
1761 | u64 resolution; | |
1762 | ||
1763 | if (params.ticks < 1) { | |
1764 | err = -EINVAL; | |
1765 | goto _end; | |
1766 | } | |
1767 | ||
1768 | /* Don't allow resolution less than 1ms */ | |
1769 | resolution = snd_timer_resolution(tu->timeri); | |
1770 | resolution *= params.ticks; | |
1771 | if (resolution < 1000000) { | |
1772 | err = -EINVAL; | |
1773 | goto _end; | |
1774 | } | |
1da177e4 | 1775 | } |
6b172a85 CL |
1776 | if (params.queue_size > 0 && |
1777 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1778 | err = -EINVAL; |
1779 | goto _end; | |
1780 | } | |
1781 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1782 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1783 | (1<<SNDRV_TIMER_EVENT_START)| | |
1784 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1785 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1786 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1787 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1788 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1789 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1790 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1791 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1792 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1793 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1794 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1795 | err = -EINVAL; |
1796 | goto _end; | |
1797 | } | |
1798 | snd_timer_stop(tu->timeri); | |
1799 | spin_lock_irq(&t->lock); | |
1800 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1801 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1802 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1803 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1804 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1805 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1806 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1807 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1808 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1809 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1810 | if (params.queue_size > 0 && |
1811 | (unsigned int)tu->queue_size != params.queue_size) { | |
890e2cb5 TI |
1812 | err = realloc_user_queue(tu, params.queue_size); |
1813 | if (err < 0) | |
1814 | goto _end; | |
1da177e4 | 1815 | } |
d7f910bf | 1816 | spin_lock_irq(&tu->qlock); |
1da177e4 LT |
1817 | tu->qhead = tu->qtail = tu->qused = 0; |
1818 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1819 | if (tu->tread) { | |
53d2f744 | 1820 | struct snd_timer_tread tread; |
cec8f96e | 1821 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1822 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1823 | tread.tstamp.tv_sec = 0; | |
1824 | tread.tstamp.tv_nsec = 0; | |
1825 | tread.val = 0; | |
1826 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1827 | } else { | |
53d2f744 | 1828 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1829 | r->resolution = 0; |
1830 | r->ticks = 0; | |
1831 | tu->qused++; | |
1832 | tu->qtail++; | |
1833 | } | |
1da177e4 LT |
1834 | } |
1835 | tu->filter = params.filter; | |
1836 | tu->ticks = params.ticks; | |
d7f910bf | 1837 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1838 | err = 0; |
1839 | _end: | |
1840 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1841 | return -EFAULT; | |
1842 | return err; | |
1843 | } | |
1844 | ||
6b172a85 | 1845 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1846 | struct snd_timer_status __user *_status) |
1da177e4 | 1847 | { |
53d2f744 TI |
1848 | struct snd_timer_user *tu; |
1849 | struct snd_timer_status status; | |
6b172a85 | 1850 | |
1da177e4 | 1851 | tu = file->private_data; |
7c64ec34 CL |
1852 | if (!tu->timeri) |
1853 | return -EBADFD; | |
1da177e4 LT |
1854 | memset(&status, 0, sizeof(status)); |
1855 | status.tstamp = tu->tstamp; | |
1856 | status.resolution = snd_timer_resolution(tu->timeri); | |
1857 | status.lost = tu->timeri->lost; | |
1858 | status.overrun = tu->overrun; | |
1859 | spin_lock_irq(&tu->qlock); | |
1860 | status.queue = tu->qused; | |
1861 | spin_unlock_irq(&tu->qlock); | |
1862 | if (copy_to_user(_status, &status, sizeof(status))) | |
1863 | return -EFAULT; | |
1864 | return 0; | |
1865 | } | |
1866 | ||
1867 | static int snd_timer_user_start(struct file *file) | |
1868 | { | |
1869 | int err; | |
53d2f744 | 1870 | struct snd_timer_user *tu; |
6b172a85 | 1871 | |
1da177e4 | 1872 | tu = file->private_data; |
7c64ec34 CL |
1873 | if (!tu->timeri) |
1874 | return -EBADFD; | |
1da177e4 LT |
1875 | snd_timer_stop(tu->timeri); |
1876 | tu->timeri->lost = 0; | |
1877 | tu->last_resolution = 0; | |
1878 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1879 | } | |
1880 | ||
1881 | static int snd_timer_user_stop(struct file *file) | |
1882 | { | |
1883 | int err; | |
53d2f744 | 1884 | struct snd_timer_user *tu; |
6b172a85 | 1885 | |
1da177e4 | 1886 | tu = file->private_data; |
7c64ec34 CL |
1887 | if (!tu->timeri) |
1888 | return -EBADFD; | |
1da177e4 LT |
1889 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1890 | } | |
1891 | ||
1892 | static int snd_timer_user_continue(struct file *file) | |
1893 | { | |
1894 | int err; | |
53d2f744 | 1895 | struct snd_timer_user *tu; |
6b172a85 | 1896 | |
1da177e4 | 1897 | tu = file->private_data; |
7c64ec34 CL |
1898 | if (!tu->timeri) |
1899 | return -EBADFD; | |
9f8a7658 TI |
1900 | /* start timer instead of continue if it's not used before */ |
1901 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
1902 | return snd_timer_user_start(file); | |
1da177e4 LT |
1903 | tu->timeri->lost = 0; |
1904 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1905 | } | |
1906 | ||
15790a6b TI |
1907 | static int snd_timer_user_pause(struct file *file) |
1908 | { | |
1909 | int err; | |
53d2f744 | 1910 | struct snd_timer_user *tu; |
6b172a85 | 1911 | |
15790a6b | 1912 | tu = file->private_data; |
7c64ec34 CL |
1913 | if (!tu->timeri) |
1914 | return -EBADFD; | |
d138b445 | 1915 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1916 | } |
1917 | ||
8c50b37c TI |
1918 | enum { |
1919 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1920 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1921 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1922 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1923 | }; | |
1924 | ||
af368027 | 1925 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1926 | unsigned long arg) |
1da177e4 | 1927 | { |
53d2f744 | 1928 | struct snd_timer_user *tu; |
1da177e4 LT |
1929 | void __user *argp = (void __user *)arg; |
1930 | int __user *p = argp; | |
6b172a85 | 1931 | |
1da177e4 LT |
1932 | tu = file->private_data; |
1933 | switch (cmd) { | |
1934 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1935 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1936 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1937 | return snd_timer_user_next_device(argp); | |
1938 | case SNDRV_TIMER_IOCTL_TREAD: | |
1939 | { | |
890e2cb5 | 1940 | int xarg, old_tread; |
6b172a85 | 1941 | |
af368027 | 1942 | if (tu->timeri) /* too late */ |
1da177e4 | 1943 | return -EBUSY; |
af368027 | 1944 | if (get_user(xarg, p)) |
1da177e4 | 1945 | return -EFAULT; |
890e2cb5 | 1946 | old_tread = tu->tread; |
1da177e4 | 1947 | tu->tread = xarg ? 1 : 0; |
890e2cb5 TI |
1948 | if (tu->tread != old_tread && |
1949 | realloc_user_queue(tu, tu->queue_size) < 0) { | |
1950 | tu->tread = old_tread; | |
1951 | return -ENOMEM; | |
1952 | } | |
1da177e4 LT |
1953 | return 0; |
1954 | } | |
1955 | case SNDRV_TIMER_IOCTL_GINFO: | |
1956 | return snd_timer_user_ginfo(file, argp); | |
1957 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1958 | return snd_timer_user_gparams(file, argp); | |
1959 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1960 | return snd_timer_user_gstatus(file, argp); | |
1961 | case SNDRV_TIMER_IOCTL_SELECT: | |
1962 | return snd_timer_user_tselect(file, argp); | |
1963 | case SNDRV_TIMER_IOCTL_INFO: | |
1964 | return snd_timer_user_info(file, argp); | |
1965 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1966 | return snd_timer_user_params(file, argp); | |
1967 | case SNDRV_TIMER_IOCTL_STATUS: | |
1968 | return snd_timer_user_status(file, argp); | |
1969 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1970 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1971 | return snd_timer_user_start(file); |
1972 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1973 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1974 | return snd_timer_user_stop(file); |
1975 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1976 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1977 | return snd_timer_user_continue(file); |
15790a6b | 1978 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1979 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1980 | return snd_timer_user_pause(file); |
1da177e4 LT |
1981 | } |
1982 | return -ENOTTY; | |
1983 | } | |
1984 | ||
af368027 TI |
1985 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1986 | unsigned long arg) | |
1987 | { | |
1988 | struct snd_timer_user *tu = file->private_data; | |
1989 | long ret; | |
1990 | ||
1991 | mutex_lock(&tu->ioctl_lock); | |
1992 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
1993 | mutex_unlock(&tu->ioctl_lock); | |
1994 | return ret; | |
1995 | } | |
1996 | ||
1da177e4 LT |
1997 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
1998 | { | |
53d2f744 | 1999 | struct snd_timer_user *tu; |
6b172a85 | 2000 | |
1da177e4 | 2001 | tu = file->private_data; |
60aa4924 | 2002 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
2003 | } |
2004 | ||
6b172a85 CL |
2005 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
2006 | size_t count, loff_t *offset) | |
1da177e4 | 2007 | { |
53d2f744 | 2008 | struct snd_timer_user *tu; |
1da177e4 | 2009 | long result = 0, unit; |
4dff5c7b | 2010 | int qhead; |
1da177e4 | 2011 | int err = 0; |
6b172a85 | 2012 | |
1da177e4 | 2013 | tu = file->private_data; |
53d2f744 | 2014 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
d11662f4 | 2015 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2016 | spin_lock_irq(&tu->qlock); |
2017 | while ((long)count - result >= unit) { | |
2018 | while (!tu->qused) { | |
ac6424b9 | 2019 | wait_queue_entry_t wait; |
1da177e4 LT |
2020 | |
2021 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
2022 | err = -EAGAIN; | |
4dff5c7b | 2023 | goto _error; |
1da177e4 LT |
2024 | } |
2025 | ||
2026 | set_current_state(TASK_INTERRUPTIBLE); | |
2027 | init_waitqueue_entry(&wait, current); | |
2028 | add_wait_queue(&tu->qchange_sleep, &wait); | |
2029 | ||
2030 | spin_unlock_irq(&tu->qlock); | |
d11662f4 | 2031 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 | 2032 | schedule(); |
d11662f4 | 2033 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2034 | spin_lock_irq(&tu->qlock); |
2035 | ||
2036 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
2037 | ||
230323da TI |
2038 | if (tu->disconnected) { |
2039 | err = -ENODEV; | |
4dff5c7b | 2040 | goto _error; |
230323da | 2041 | } |
1da177e4 LT |
2042 | if (signal_pending(current)) { |
2043 | err = -ERESTARTSYS; | |
4dff5c7b | 2044 | goto _error; |
1da177e4 LT |
2045 | } |
2046 | } | |
2047 | ||
4dff5c7b TI |
2048 | qhead = tu->qhead++; |
2049 | tu->qhead %= tu->queue_size; | |
3fa6993f | 2050 | tu->qused--; |
1da177e4 | 2051 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2052 | |
2053 | if (tu->tread) { | |
4dff5c7b TI |
2054 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
2055 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 2056 | err = -EFAULT; |
1da177e4 | 2057 | } else { |
4dff5c7b TI |
2058 | if (copy_to_user(buffer, &tu->queue[qhead], |
2059 | sizeof(struct snd_timer_read))) | |
1da177e4 | 2060 | err = -EFAULT; |
1da177e4 LT |
2061 | } |
2062 | ||
1da177e4 | 2063 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
2064 | if (err < 0) |
2065 | goto _error; | |
2066 | result += unit; | |
2067 | buffer += unit; | |
1da177e4 | 2068 | } |
1da177e4 | 2069 | _error: |
4dff5c7b | 2070 | spin_unlock_irq(&tu->qlock); |
d11662f4 | 2071 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
2072 | return result > 0 ? result : err; |
2073 | } | |
2074 | ||
2075 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
2076 | { | |
2077 | unsigned int mask; | |
53d2f744 | 2078 | struct snd_timer_user *tu; |
1da177e4 LT |
2079 | |
2080 | tu = file->private_data; | |
2081 | ||
2082 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 2083 | |
1da177e4 | 2084 | mask = 0; |
d7f910bf | 2085 | spin_lock_irq(&tu->qlock); |
1da177e4 LT |
2086 | if (tu->qused) |
2087 | mask |= POLLIN | POLLRDNORM; | |
230323da TI |
2088 | if (tu->disconnected) |
2089 | mask |= POLLERR; | |
d7f910bf | 2090 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2091 | |
2092 | return mask; | |
2093 | } | |
2094 | ||
2095 | #ifdef CONFIG_COMPAT | |
2096 | #include "timer_compat.c" | |
2097 | #else | |
2098 | #define snd_timer_user_ioctl_compat NULL | |
2099 | #endif | |
2100 | ||
9c2e08c5 | 2101 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2102 | { |
2103 | .owner = THIS_MODULE, | |
2104 | .read = snd_timer_user_read, | |
2105 | .open = snd_timer_user_open, | |
2106 | .release = snd_timer_user_release, | |
02f4865f | 2107 | .llseek = no_llseek, |
1da177e4 LT |
2108 | .poll = snd_timer_user_poll, |
2109 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2110 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2111 | .fasync = snd_timer_user_fasync, | |
2112 | }; | |
2113 | ||
7c35860d TI |
2114 | /* unregister the system timer */ |
2115 | static void snd_timer_free_all(void) | |
2116 | { | |
2117 | struct snd_timer *timer, *n; | |
2118 | ||
2119 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2120 | snd_timer_free(timer); | |
2121 | } | |
2122 | ||
89da061f TI |
2123 | static struct device timer_dev; |
2124 | ||
1da177e4 LT |
2125 | /* |
2126 | * ENTRY functions | |
2127 | */ | |
2128 | ||
1da177e4 LT |
2129 | static int __init alsa_timer_init(void) |
2130 | { | |
2131 | int err; | |
1da177e4 | 2132 | |
89da061f TI |
2133 | snd_device_initialize(&timer_dev, NULL); |
2134 | dev_set_name(&timer_dev, "timer"); | |
2135 | ||
1da177e4 | 2136 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2137 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2138 | "system timer"); | |
1da177e4 | 2139 | #endif |
e28563cc | 2140 | |
7c35860d TI |
2141 | err = snd_timer_register_system(); |
2142 | if (err < 0) { | |
cf74dcf3 | 2143 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
1ae0e4ce | 2144 | goto put_timer; |
7c35860d TI |
2145 | } |
2146 | ||
40a4b263 TI |
2147 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2148 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2149 | if (err < 0) { |
cf74dcf3 | 2150 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2151 | snd_timer_free_all(); |
1ae0e4ce | 2152 | goto put_timer; |
7c35860d TI |
2153 | } |
2154 | ||
e28563cc | 2155 | snd_timer_proc_init(); |
1da177e4 | 2156 | return 0; |
1ae0e4ce ME |
2157 | |
2158 | put_timer: | |
2159 | put_device(&timer_dev); | |
2160 | return err; | |
1da177e4 LT |
2161 | } |
2162 | ||
2163 | static void __exit alsa_timer_exit(void) | |
2164 | { | |
40a4b263 | 2165 | snd_unregister_device(&timer_dev); |
7c35860d | 2166 | snd_timer_free_all(); |
89da061f | 2167 | put_device(&timer_dev); |
e28563cc | 2168 | snd_timer_proc_done(); |
1da177e4 LT |
2169 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2170 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2171 | #endif | |
2172 | } | |
2173 | ||
2174 | module_init(alsa_timer_init) | |
2175 | module_exit(alsa_timer_exit) |