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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 | ||
e1ac631c TI |
91 | #define MAX_SLAVE_INSTANCES 1000 |
92 | static int num_slaves; | |
93 | ||
1a60d4c5 | 94 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 95 | |
53d2f744 TI |
96 | static int snd_timer_free(struct snd_timer *timer); |
97 | static int snd_timer_dev_free(struct snd_device *device); | |
98 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 99 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 100 | |
53d2f744 | 101 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
102 | |
103 | /* | |
104 | * create a timer instance with the given owner string. | |
105 | * when timer is not NULL, increments the module counter | |
106 | */ | |
53d2f744 TI |
107 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
108 | struct snd_timer *timer) | |
1da177e4 | 109 | { |
53d2f744 | 110 | struct snd_timer_instance *timeri; |
ca2c0966 | 111 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
112 | if (timeri == NULL) |
113 | return NULL; | |
543537bd | 114 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
115 | if (! timeri->owner) { |
116 | kfree(timeri); | |
117 | return NULL; | |
118 | } | |
119 | INIT_LIST_HEAD(&timeri->open_list); | |
120 | INIT_LIST_HEAD(&timeri->active_list); | |
121 | INIT_LIST_HEAD(&timeri->ack_list); | |
122 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
123 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
124 | ||
125 | timeri->timer = timer; | |
de24214d | 126 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
127 | kfree(timeri->owner); |
128 | kfree(timeri); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | return timeri; | |
133 | } | |
134 | ||
135 | /* | |
136 | * find a timer instance from the given timer id | |
137 | */ | |
53d2f744 | 138 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 139 | { |
53d2f744 | 140 | struct snd_timer *timer = NULL; |
1da177e4 | 141 | |
9244b2c3 | 142 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
143 | if (timer->tmr_class != tid->dev_class) |
144 | continue; | |
145 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
146 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
147 | (timer->card == NULL || | |
148 | timer->card->number != tid->card)) | |
149 | continue; | |
150 | if (timer->tmr_device != tid->device) | |
151 | continue; | |
152 | if (timer->tmr_subdevice != tid->subdevice) | |
153 | continue; | |
154 | return timer; | |
155 | } | |
156 | return NULL; | |
157 | } | |
158 | ||
ee2da997 | 159 | #ifdef CONFIG_MODULES |
1da177e4 | 160 | |
53d2f744 | 161 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 162 | { |
1da177e4 LT |
163 | switch (tid->dev_class) { |
164 | case SNDRV_TIMER_CLASS_GLOBAL: | |
165 | if (tid->device < timer_limit) | |
166 | request_module("snd-timer-%i", tid->device); | |
167 | break; | |
168 | case SNDRV_TIMER_CLASS_CARD: | |
169 | case SNDRV_TIMER_CLASS_PCM: | |
170 | if (tid->card < snd_ecards_limit) | |
171 | request_module("snd-card-%i", tid->card); | |
172 | break; | |
173 | default: | |
174 | break; | |
175 | } | |
176 | } | |
177 | ||
178 | #endif | |
179 | ||
180 | /* | |
181 | * look for a master instance matching with the slave id of the given slave. | |
182 | * when found, relink the open_link of the slave. | |
183 | * | |
184 | * call this with register_mutex down. | |
185 | */ | |
9b7d869e | 186 | static int snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 187 | { |
53d2f744 TI |
188 | struct snd_timer *timer; |
189 | struct snd_timer_instance *master; | |
1da177e4 LT |
190 | |
191 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
192 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
193 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
194 | if (slave->slave_class == master->slave_class && |
195 | slave->slave_id == master->slave_id) { | |
9b7d869e TI |
196 | if (master->timer->num_instances >= |
197 | master->timer->max_instances) | |
198 | return -EBUSY; | |
5b7c757d NK |
199 | list_move_tail(&slave->open_list, |
200 | &master->slave_list_head); | |
9b7d869e | 201 | master->timer->num_instances++; |
1da177e4 LT |
202 | spin_lock_irq(&slave_active_lock); |
203 | slave->master = master; | |
204 | slave->timer = master->timer; | |
205 | spin_unlock_irq(&slave_active_lock); | |
9b7d869e | 206 | return 0; |
1da177e4 LT |
207 | } |
208 | } | |
209 | } | |
9b7d869e | 210 | return 0; |
1da177e4 LT |
211 | } |
212 | ||
213 | /* | |
214 | * look for slave instances matching with the slave id of the given master. | |
215 | * when found, relink the open_link of slaves. | |
216 | * | |
217 | * call this with register_mutex down. | |
218 | */ | |
9b7d869e | 219 | static int snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 220 | { |
9244b2c3 | 221 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
222 | |
223 | /* check all pending slaves */ | |
9244b2c3 | 224 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
225 | if (slave->slave_class == master->slave_class && |
226 | slave->slave_id == master->slave_id) { | |
9b7d869e TI |
227 | if (master->timer->num_instances >= |
228 | master->timer->max_instances) | |
229 | return -EBUSY; | |
9244b2c3 | 230 | list_move_tail(&slave->open_list, &master->slave_list_head); |
9b7d869e | 231 | master->timer->num_instances++; |
1da177e4 | 232 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 233 | spin_lock(&master->timer->lock); |
1da177e4 LT |
234 | slave->master = master; |
235 | slave->timer = master->timer; | |
236 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
237 | list_add_tail(&slave->active_list, |
238 | &master->slave_active_head); | |
b5a663aa | 239 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
240 | spin_unlock_irq(&slave_active_lock); |
241 | } | |
242 | } | |
9b7d869e | 243 | return 0; |
1da177e4 LT |
244 | } |
245 | ||
b50b0dc1 TI |
246 | static int snd_timer_close_locked(struct snd_timer_instance *timeri, |
247 | struct device **card_devp_to_put); | |
9b7d869e | 248 | |
1da177e4 LT |
249 | /* |
250 | * open a timer instance | |
251 | * when opening a master, the slave id must be here given. | |
252 | */ | |
53d2f744 TI |
253 | int snd_timer_open(struct snd_timer_instance **ti, |
254 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
255 | unsigned int slave_id) |
256 | { | |
53d2f744 TI |
257 | struct snd_timer *timer; |
258 | struct snd_timer_instance *timeri = NULL; | |
b50b0dc1 | 259 | struct device *card_dev_to_put = NULL; |
9b7d869e | 260 | int err; |
6b172a85 | 261 | |
2ec7970c | 262 | mutex_lock(®ister_mutex); |
1da177e4 LT |
263 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
264 | /* open a slave instance */ | |
265 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
266 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
267 | pr_debug("ALSA: timer: invalid slave class %i\n", |
268 | tid->dev_sclass); | |
2ec7970c TI |
269 | err = -EINVAL; |
270 | goto unlock; | |
1da177e4 | 271 | } |
e1ac631c TI |
272 | if (num_slaves >= MAX_SLAVE_INSTANCES) { |
273 | err = -EBUSY; | |
274 | goto unlock; | |
275 | } | |
1da177e4 | 276 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 277 | if (!timeri) { |
2ec7970c TI |
278 | err = -ENOMEM; |
279 | goto unlock; | |
2fd43d11 | 280 | } |
1da177e4 LT |
281 | timeri->slave_class = tid->dev_sclass; |
282 | timeri->slave_id = tid->device; | |
283 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
284 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
e1ac631c | 285 | num_slaves++; |
9b7d869e TI |
286 | err = snd_timer_check_slave(timeri); |
287 | if (err < 0) { | |
b50b0dc1 | 288 | snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e TI |
289 | timeri = NULL; |
290 | } | |
2ec7970c | 291 | goto unlock; |
1da177e4 LT |
292 | } |
293 | ||
294 | /* open a master instance */ | |
1da177e4 | 295 | timer = snd_timer_find(tid); |
ee2da997 JB |
296 | #ifdef CONFIG_MODULES |
297 | if (!timer) { | |
1a60d4c5 | 298 | mutex_unlock(®ister_mutex); |
1da177e4 | 299 | snd_timer_request(tid); |
1a60d4c5 | 300 | mutex_lock(®ister_mutex); |
1da177e4 LT |
301 | timer = snd_timer_find(tid); |
302 | } | |
303 | #endif | |
2fd43d11 | 304 | if (!timer) { |
2ec7970c TI |
305 | err = -ENODEV; |
306 | goto unlock; | |
1da177e4 | 307 | } |
2fd43d11 | 308 | if (!list_empty(&timer->open_list_head)) { |
021de099 TI |
309 | struct snd_timer_instance *t = |
310 | list_entry(timer->open_list_head.next, | |
53d2f744 | 311 | struct snd_timer_instance, open_list); |
021de099 | 312 | if (t->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
2ec7970c | 313 | err = -EBUSY; |
2ec7970c | 314 | goto unlock; |
2fd43d11 CL |
315 | } |
316 | } | |
9b7d869e | 317 | if (timer->num_instances >= timer->max_instances) { |
2ec7970c TI |
318 | err = -EBUSY; |
319 | goto unlock; | |
9b7d869e | 320 | } |
2fd43d11 CL |
321 | timeri = snd_timer_instance_new(owner, timer); |
322 | if (!timeri) { | |
2ec7970c TI |
323 | err = -ENOMEM; |
324 | goto unlock; | |
2fd43d11 | 325 | } |
230323da TI |
326 | /* take a card refcount for safe disconnection */ |
327 | if (timer->card) | |
328 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
329 | timeri->slave_class = tid->dev_sclass; |
330 | timeri->slave_id = slave_id; | |
8ddc0563 VN |
331 | |
332 | if (list_empty(&timer->open_list_head) && timer->hw.open) { | |
2ec7970c | 333 | err = timer->hw.open(timer); |
8ddc0563 VN |
334 | if (err) { |
335 | kfree(timeri->owner); | |
336 | kfree(timeri); | |
2ec7970c | 337 | timeri = NULL; |
8ddc0563 VN |
338 | |
339 | if (timer->card) | |
b50b0dc1 | 340 | card_dev_to_put = &timer->card->card_dev; |
8ddc0563 | 341 | module_put(timer->module); |
2ec7970c | 342 | goto unlock; |
8ddc0563 VN |
343 | } |
344 | } | |
345 | ||
2fd43d11 | 346 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
9b7d869e TI |
347 | timer->num_instances++; |
348 | err = snd_timer_check_master(timeri); | |
349 | if (err < 0) { | |
b50b0dc1 | 350 | snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e TI |
351 | timeri = NULL; |
352 | } | |
2ec7970c TI |
353 | |
354 | unlock: | |
1a60d4c5 | 355 | mutex_unlock(®ister_mutex); |
b50b0dc1 TI |
356 | /* put_device() is called after unlock for avoiding deadlock */ |
357 | if (card_dev_to_put) | |
358 | put_device(card_dev_to_put); | |
1da177e4 | 359 | *ti = timeri; |
9b7d869e | 360 | return err; |
1da177e4 | 361 | } |
98856392 | 362 | EXPORT_SYMBOL(snd_timer_open); |
1da177e4 | 363 | |
1da177e4 LT |
364 | /* |
365 | * close a timer instance | |
9b7d869e | 366 | * call this with register_mutex down. |
1da177e4 | 367 | */ |
b50b0dc1 TI |
368 | static int snd_timer_close_locked(struct snd_timer_instance *timeri, |
369 | struct device **card_devp_to_put) | |
1da177e4 | 370 | { |
53d2f744 | 371 | struct snd_timer *timer = NULL; |
9244b2c3 | 372 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 373 | |
9984d1b5 | 374 | list_del(&timeri->open_list); |
e1ac631c TI |
375 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
376 | num_slaves--; | |
9984d1b5 | 377 | |
1da177e4 LT |
378 | /* force to stop the timer */ |
379 | snd_timer_stop(timeri); | |
380 | ||
9984d1b5 TI |
381 | timer = timeri->timer; |
382 | if (timer) { | |
9b7d869e | 383 | timer->num_instances--; |
1da177e4 LT |
384 | /* wait, until the active callback is finished */ |
385 | spin_lock_irq(&timer->lock); | |
386 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
387 | spin_unlock_irq(&timer->lock); | |
388 | udelay(10); | |
389 | spin_lock_irq(&timer->lock); | |
390 | } | |
391 | spin_unlock_irq(&timer->lock); | |
9984d1b5 | 392 | |
1da177e4 | 393 | /* remove slave links */ |
b5a663aa TI |
394 | spin_lock_irq(&slave_active_lock); |
395 | spin_lock(&timer->lock); | |
9244b2c3 JB |
396 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
397 | open_list) { | |
9244b2c3 | 398 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
9b7d869e | 399 | timer->num_instances--; |
1da177e4 LT |
400 | slave->master = NULL; |
401 | slave->timer = NULL; | |
b5a663aa TI |
402 | list_del_init(&slave->ack_list); |
403 | list_del_init(&slave->active_list); | |
1da177e4 | 404 | } |
b5a663aa TI |
405 | spin_unlock(&timer->lock); |
406 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
407 | |
408 | /* slave doesn't need to release timer resources below */ | |
409 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
410 | timer = NULL; | |
1da177e4 | 411 | } |
9984d1b5 | 412 | |
1da177e4 LT |
413 | if (timeri->private_free) |
414 | timeri->private_free(timeri); | |
415 | kfree(timeri->owner); | |
416 | kfree(timeri); | |
9984d1b5 TI |
417 | |
418 | if (timer) { | |
419 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
420 | timer->hw.close(timer); | |
421 | /* release a card refcount for safe disconnection */ | |
422 | if (timer->card) | |
b50b0dc1 | 423 | *card_devp_to_put = &timer->card->card_dev; |
de24214d | 424 | module_put(timer->module); |
9984d1b5 TI |
425 | } |
426 | ||
1da177e4 LT |
427 | return 0; |
428 | } | |
9b7d869e TI |
429 | |
430 | /* | |
431 | * close a timer instance | |
432 | */ | |
433 | int snd_timer_close(struct snd_timer_instance *timeri) | |
434 | { | |
b50b0dc1 | 435 | struct device *card_dev_to_put = NULL; |
9b7d869e TI |
436 | int err; |
437 | ||
438 | if (snd_BUG_ON(!timeri)) | |
439 | return -ENXIO; | |
440 | ||
441 | mutex_lock(®ister_mutex); | |
b50b0dc1 | 442 | err = snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e | 443 | mutex_unlock(®ister_mutex); |
b50b0dc1 TI |
444 | /* put_device() is called after unlock for avoiding deadlock */ |
445 | if (card_dev_to_put) | |
446 | put_device(card_dev_to_put); | |
9b7d869e TI |
447 | return err; |
448 | } | |
98856392 | 449 | EXPORT_SYMBOL(snd_timer_close); |
1da177e4 | 450 | |
53d2f744 | 451 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 452 | { |
53d2f744 | 453 | struct snd_timer * timer; |
1da177e4 LT |
454 | |
455 | if (timeri == NULL) | |
456 | return 0; | |
dd1f7ab8 ME |
457 | timer = timeri->timer; |
458 | if (timer) { | |
1da177e4 LT |
459 | if (timer->hw.c_resolution) |
460 | return timer->hw.c_resolution(timer); | |
461 | return timer->hw.resolution; | |
462 | } | |
463 | return 0; | |
464 | } | |
98856392 | 465 | EXPORT_SYMBOL(snd_timer_resolution); |
1da177e4 | 466 | |
53d2f744 | 467 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 468 | { |
53d2f744 | 469 | struct snd_timer *timer; |
1da177e4 | 470 | unsigned long resolution = 0; |
53d2f744 | 471 | struct snd_timer_instance *ts; |
1da177e4 LT |
472 | struct timespec tstamp; |
473 | ||
b751eef1 | 474 | if (timer_tstamp_monotonic) |
26204e04 | 475 | ktime_get_ts(&tstamp); |
b751eef1 JK |
476 | else |
477 | getnstimeofday(&tstamp); | |
7eaa943c TI |
478 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
479 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
480 | return; | |
6b172a85 CL |
481 | if (event == SNDRV_TIMER_EVENT_START || |
482 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
483 | resolution = snd_timer_resolution(ti); |
484 | if (ti->ccallback) | |
b30477d5 | 485 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
486 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
487 | return; | |
488 | timer = ti->timer; | |
489 | if (timer == NULL) | |
490 | return; | |
491 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
492 | return; | |
9244b2c3 | 493 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 494 | if (ts->ccallback) |
117159f0 | 495 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
496 | } |
497 | ||
f65e0d29 TI |
498 | /* start/continue a master timer */ |
499 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
500 | bool start, unsigned long ticks) | |
1da177e4 | 501 | { |
f65e0d29 TI |
502 | struct snd_timer *timer; |
503 | int result; | |
504 | unsigned long flags; | |
505 | ||
506 | timer = timeri->timer; | |
507 | if (!timer) | |
508 | return -EINVAL; | |
509 | ||
510 | spin_lock_irqsave(&timer->lock, flags); | |
511 | if (timer->card && timer->card->shutdown) { | |
512 | result = -ENODEV; | |
513 | goto unlock; | |
514 | } | |
515 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
516 | SNDRV_TIMER_IFLG_START)) { | |
517 | result = -EBUSY; | |
518 | goto unlock; | |
519 | } | |
520 | ||
521 | if (start) | |
522 | timeri->ticks = timeri->cticks = ticks; | |
523 | else if (!timeri->cticks) | |
524 | timeri->cticks = 1; | |
525 | timeri->pticks = 0; | |
526 | ||
5b7c757d | 527 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
528 | if (timer->running) { |
529 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
530 | goto __start_now; | |
531 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
532 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 533 | result = 1; /* delayed start */ |
1da177e4 | 534 | } else { |
f65e0d29 TI |
535 | if (start) |
536 | timer->sticks = ticks; | |
1da177e4 LT |
537 | timer->hw.start(timer); |
538 | __start_now: | |
539 | timer->running++; | |
540 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 541 | result = 0; |
1da177e4 | 542 | } |
f65e0d29 TI |
543 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
544 | SNDRV_TIMER_EVENT_CONTINUE); | |
545 | unlock: | |
546 | spin_unlock_irqrestore(&timer->lock, flags); | |
547 | return result; | |
1da177e4 LT |
548 | } |
549 | ||
f65e0d29 TI |
550 | /* start/continue a slave timer */ |
551 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
552 | bool start) | |
1da177e4 LT |
553 | { |
554 | unsigned long flags; | |
555 | ||
556 | spin_lock_irqsave(&slave_active_lock, flags); | |
f784beb7 TI |
557 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
558 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
559 | return -EBUSY; | |
560 | } | |
1da177e4 | 561 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
562 | if (timeri->master && timeri->timer) { |
563 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
564 | list_add_tail(&timeri->active_list, |
565 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
566 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
567 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
568 | spin_unlock(&timeri->timer->lock); |
569 | } | |
1da177e4 LT |
570 | spin_unlock_irqrestore(&slave_active_lock, flags); |
571 | return 1; /* delayed start */ | |
572 | } | |
573 | ||
f65e0d29 TI |
574 | /* stop/pause a master timer */ |
575 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 576 | { |
53d2f744 | 577 | struct snd_timer *timer; |
f65e0d29 | 578 | int result = 0; |
1da177e4 LT |
579 | unsigned long flags; |
580 | ||
1da177e4 LT |
581 | timer = timeri->timer; |
582 | if (!timer) | |
583 | return -EINVAL; | |
584 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
585 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
586 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
587 | result = -EBUSY; |
588 | goto unlock; | |
f784beb7 | 589 | } |
1da177e4 LT |
590 | list_del_init(&timeri->ack_list); |
591 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
592 | if (timer->card && timer->card->shutdown) |
593 | goto unlock; | |
594 | if (stop) { | |
595 | timeri->cticks = timeri->ticks; | |
596 | timeri->pticks = 0; | |
230323da | 597 | } |
1da177e4 LT |
598 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
599 | !(--timer->running)) { | |
600 | timer->hw.stop(timer); | |
601 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
602 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
603 | snd_timer_reschedule(timer, 0); | |
604 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
605 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
606 | timer->hw.start(timer); | |
607 | } | |
608 | } | |
609 | } | |
c3b16813 | 610 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
9f8a7658 TI |
611 | if (stop) |
612 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; | |
613 | else | |
614 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; | |
f65e0d29 | 615 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
837603d5 | 616 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 | 617 | unlock: |
1da177e4 | 618 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
619 | return result; |
620 | } | |
621 | ||
622 | /* stop/pause a slave timer */ | |
623 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
624 | { | |
625 | unsigned long flags; | |
626 | ||
627 | spin_lock_irqsave(&slave_active_lock, flags); | |
628 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
629 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
630 | return -EBUSY; | |
631 | } | |
632 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
633 | if (timeri->timer) { | |
634 | spin_lock(&timeri->timer->lock); | |
635 | list_del_init(&timeri->ack_list); | |
636 | list_del_init(&timeri->active_list); | |
637 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
837603d5 | 638 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 TI |
639 | spin_unlock(&timeri->timer->lock); |
640 | } | |
641 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
642 | return 0; |
643 | } | |
644 | ||
f65e0d29 TI |
645 | /* |
646 | * start the timer instance | |
647 | */ | |
648 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
649 | { | |
650 | if (timeri == NULL || ticks < 1) | |
651 | return -EINVAL; | |
652 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
653 | return snd_timer_start_slave(timeri, true); | |
654 | else | |
655 | return snd_timer_start1(timeri, true, ticks); | |
656 | } | |
98856392 | 657 | EXPORT_SYMBOL(snd_timer_start); |
f65e0d29 | 658 | |
1da177e4 LT |
659 | /* |
660 | * stop the timer instance. | |
661 | * | |
662 | * do not call this from the timer callback! | |
663 | */ | |
53d2f744 | 664 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 665 | { |
f65e0d29 TI |
666 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
667 | return snd_timer_stop_slave(timeri, true); | |
668 | else | |
669 | return snd_timer_stop1(timeri, true); | |
1da177e4 | 670 | } |
98856392 | 671 | EXPORT_SYMBOL(snd_timer_stop); |
1da177e4 LT |
672 | |
673 | /* | |
674 | * start again.. the tick is kept. | |
675 | */ | |
53d2f744 | 676 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 677 | { |
9f8a7658 TI |
678 | /* timer can continue only after pause */ |
679 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
680 | return -EINVAL; | |
681 | ||
1da177e4 | 682 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
683 | return snd_timer_start_slave(timeri, false); |
684 | else | |
685 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 | 686 | } |
98856392 | 687 | EXPORT_SYMBOL(snd_timer_continue); |
1da177e4 LT |
688 | |
689 | /* | |
690 | * pause.. remember the ticks left | |
691 | */ | |
53d2f744 | 692 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 693 | { |
f65e0d29 TI |
694 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
695 | return snd_timer_stop_slave(timeri, false); | |
696 | else | |
697 | return snd_timer_stop1(timeri, false); | |
1da177e4 | 698 | } |
98856392 | 699 | EXPORT_SYMBOL(snd_timer_pause); |
1da177e4 LT |
700 | |
701 | /* | |
702 | * reschedule the timer | |
703 | * | |
704 | * start pending instances and check the scheduling ticks. | |
705 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
706 | */ | |
53d2f744 | 707 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 708 | { |
53d2f744 | 709 | struct snd_timer_instance *ti; |
1da177e4 | 710 | unsigned long ticks = ~0UL; |
1da177e4 | 711 | |
9244b2c3 | 712 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
713 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
714 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
715 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
716 | timer->running++; | |
717 | } | |
718 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
719 | if (ticks > ti->cticks) | |
720 | ticks = ti->cticks; | |
721 | } | |
722 | } | |
723 | if (ticks == ~0UL) { | |
724 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
725 | return; | |
726 | } | |
727 | if (ticks > timer->hw.ticks) | |
728 | ticks = timer->hw.ticks; | |
729 | if (ticks_left != ticks) | |
730 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
731 | timer->sticks = ticks; | |
732 | } | |
733 | ||
734 | /* | |
735 | * timer tasklet | |
736 | * | |
737 | */ | |
738 | static void snd_timer_tasklet(unsigned long arg) | |
739 | { | |
53d2f744 TI |
740 | struct snd_timer *timer = (struct snd_timer *) arg; |
741 | struct snd_timer_instance *ti; | |
1da177e4 LT |
742 | struct list_head *p; |
743 | unsigned long resolution, ticks; | |
2999ff5b | 744 | unsigned long flags; |
1da177e4 | 745 | |
230323da TI |
746 | if (timer->card && timer->card->shutdown) |
747 | return; | |
748 | ||
2999ff5b | 749 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
750 | /* now process all callbacks */ |
751 | while (!list_empty(&timer->sack_list_head)) { | |
752 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 753 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
754 | |
755 | /* remove from ack_list and make empty */ | |
756 | list_del_init(p); | |
6b172a85 | 757 | |
1da177e4 LT |
758 | ticks = ti->pticks; |
759 | ti->pticks = 0; | |
760 | resolution = ti->resolution; | |
761 | ||
762 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
763 | spin_unlock(&timer->lock); | |
764 | if (ti->callback) | |
765 | ti->callback(ti, resolution, ticks); | |
766 | spin_lock(&timer->lock); | |
767 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
768 | } | |
2999ff5b | 769 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
770 | } |
771 | ||
772 | /* | |
773 | * timer interrupt | |
774 | * | |
775 | * ticks_left is usually equal to timer->sticks. | |
776 | * | |
777 | */ | |
53d2f744 | 778 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 779 | { |
9244b2c3 | 780 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 781 | unsigned long resolution, ticks; |
9244b2c3 | 782 | struct list_head *p, *ack_list_head; |
b32425ac | 783 | unsigned long flags; |
1da177e4 LT |
784 | int use_tasklet = 0; |
785 | ||
786 | if (timer == NULL) | |
787 | return; | |
788 | ||
230323da TI |
789 | if (timer->card && timer->card->shutdown) |
790 | return; | |
791 | ||
b32425ac | 792 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
793 | |
794 | /* remember the current resolution */ | |
795 | if (timer->hw.c_resolution) | |
796 | resolution = timer->hw.c_resolution(timer); | |
797 | else | |
798 | resolution = timer->hw.resolution; | |
799 | ||
800 | /* loop for all active instances | |
9244b2c3 | 801 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
802 | * processed instance is relinked to done_list_head before the callback |
803 | * is called. | |
1da177e4 | 804 | */ |
9244b2c3 JB |
805 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
806 | active_list) { | |
1da177e4 LT |
807 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
808 | continue; | |
809 | ti->pticks += ticks_left; | |
810 | ti->resolution = resolution; | |
811 | if (ti->cticks < ticks_left) | |
812 | ti->cticks = 0; | |
813 | else | |
814 | ti->cticks -= ticks_left; | |
815 | if (ti->cticks) /* not expired */ | |
816 | continue; | |
817 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
818 | ti->cticks = ti->ticks; | |
819 | } else { | |
820 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
821 | --timer->running; |
822 | list_del_init(&ti->active_list); | |
1da177e4 | 823 | } |
6b172a85 CL |
824 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
825 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
826 | ack_list_head = &timer->ack_list_head; | |
827 | else | |
828 | ack_list_head = &timer->sack_list_head; | |
829 | if (list_empty(&ti->ack_list)) | |
830 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 831 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
832 | ts->pticks = ti->pticks; |
833 | ts->resolution = resolution; | |
6b172a85 CL |
834 | if (list_empty(&ts->ack_list)) |
835 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
836 | } |
837 | } | |
838 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 839 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
840 | if (timer->running) { |
841 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
842 | timer->hw.stop(timer); | |
843 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
844 | } | |
845 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
846 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
847 | /* restart timer */ | |
848 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
849 | timer->hw.start(timer); | |
850 | } | |
851 | } else { | |
852 | timer->hw.stop(timer); | |
853 | } | |
854 | ||
855 | /* now process all fast callbacks */ | |
856 | while (!list_empty(&timer->ack_list_head)) { | |
857 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 858 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 859 | |
1da177e4 LT |
860 | /* remove from ack_list and make empty */ |
861 | list_del_init(p); | |
6b172a85 | 862 | |
1da177e4 LT |
863 | ticks = ti->pticks; |
864 | ti->pticks = 0; | |
865 | ||
866 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
867 | spin_unlock(&timer->lock); | |
868 | if (ti->callback) | |
869 | ti->callback(ti, resolution, ticks); | |
870 | spin_lock(&timer->lock); | |
871 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
872 | } | |
873 | ||
874 | /* do we have any slow callbacks? */ | |
875 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 876 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
877 | |
878 | if (use_tasklet) | |
1f04128a | 879 | tasklet_schedule(&timer->task_queue); |
1da177e4 | 880 | } |
98856392 | 881 | EXPORT_SYMBOL(snd_timer_interrupt); |
1da177e4 LT |
882 | |
883 | /* | |
884 | ||
885 | */ | |
886 | ||
53d2f744 TI |
887 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
888 | struct snd_timer **rtimer) | |
1da177e4 | 889 | { |
53d2f744 | 890 | struct snd_timer *timer; |
1da177e4 | 891 | int err; |
53d2f744 | 892 | static struct snd_device_ops ops = { |
1da177e4 LT |
893 | .dev_free = snd_timer_dev_free, |
894 | .dev_register = snd_timer_dev_register, | |
c461482c | 895 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
896 | }; |
897 | ||
7eaa943c TI |
898 | if (snd_BUG_ON(!tid)) |
899 | return -EINVAL; | |
900 | if (rtimer) | |
901 | *rtimer = NULL; | |
ca2c0966 | 902 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 903 | if (!timer) |
1da177e4 LT |
904 | return -ENOMEM; |
905 | timer->tmr_class = tid->dev_class; | |
906 | timer->card = card; | |
907 | timer->tmr_device = tid->device; | |
908 | timer->tmr_subdevice = tid->subdevice; | |
909 | if (id) | |
910 | strlcpy(timer->id, id, sizeof(timer->id)); | |
6b760bb2 | 911 | timer->sticks = 1; |
1da177e4 LT |
912 | INIT_LIST_HEAD(&timer->device_list); |
913 | INIT_LIST_HEAD(&timer->open_list_head); | |
914 | INIT_LIST_HEAD(&timer->active_list_head); | |
915 | INIT_LIST_HEAD(&timer->ack_list_head); | |
916 | INIT_LIST_HEAD(&timer->sack_list_head); | |
917 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
918 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
919 | (unsigned long)timer); | |
9b7d869e | 920 | timer->max_instances = 1000; /* default limit per timer */ |
1da177e4 | 921 | if (card != NULL) { |
de24214d | 922 | timer->module = card->module; |
6b172a85 CL |
923 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
924 | if (err < 0) { | |
1da177e4 LT |
925 | snd_timer_free(timer); |
926 | return err; | |
927 | } | |
928 | } | |
7eaa943c TI |
929 | if (rtimer) |
930 | *rtimer = timer; | |
1da177e4 LT |
931 | return 0; |
932 | } | |
98856392 | 933 | EXPORT_SYMBOL(snd_timer_new); |
1da177e4 | 934 | |
53d2f744 | 935 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 936 | { |
7eaa943c TI |
937 | if (!timer) |
938 | return 0; | |
c461482c TI |
939 | |
940 | mutex_lock(®ister_mutex); | |
941 | if (! list_empty(&timer->open_list_head)) { | |
942 | struct list_head *p, *n; | |
943 | struct snd_timer_instance *ti; | |
cf74dcf3 | 944 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
945 | list_for_each_safe(p, n, &timer->open_list_head) { |
946 | list_del_init(p); | |
947 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
948 | ti->timer = NULL; | |
949 | } | |
950 | } | |
951 | list_del(&timer->device_list); | |
952 | mutex_unlock(®ister_mutex); | |
953 | ||
1da177e4 LT |
954 | if (timer->private_free) |
955 | timer->private_free(timer); | |
956 | kfree(timer); | |
957 | return 0; | |
958 | } | |
959 | ||
53d2f744 | 960 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 961 | { |
53d2f744 | 962 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
963 | return snd_timer_free(timer); |
964 | } | |
965 | ||
53d2f744 | 966 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 967 | { |
53d2f744 TI |
968 | struct snd_timer *timer = dev->device_data; |
969 | struct snd_timer *timer1; | |
1da177e4 | 970 | |
7eaa943c TI |
971 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
972 | return -ENXIO; | |
1da177e4 LT |
973 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
974 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
975 | return -EINVAL; | |
976 | ||
1a60d4c5 | 977 | mutex_lock(®ister_mutex); |
9244b2c3 | 978 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
979 | if (timer1->tmr_class > timer->tmr_class) |
980 | break; | |
981 | if (timer1->tmr_class < timer->tmr_class) | |
982 | continue; | |
983 | if (timer1->card && timer->card) { | |
984 | if (timer1->card->number > timer->card->number) | |
985 | break; | |
986 | if (timer1->card->number < timer->card->number) | |
987 | continue; | |
988 | } | |
989 | if (timer1->tmr_device > timer->tmr_device) | |
990 | break; | |
991 | if (timer1->tmr_device < timer->tmr_device) | |
992 | continue; | |
993 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
994 | break; | |
995 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
996 | continue; | |
997 | /* conflicts.. */ | |
1a60d4c5 | 998 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
999 | return -EBUSY; |
1000 | } | |
9244b2c3 | 1001 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 1002 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1003 | return 0; |
1004 | } | |
1005 | ||
c461482c | 1006 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 1007 | { |
c461482c | 1008 | struct snd_timer *timer = device->device_data; |
230323da TI |
1009 | struct snd_timer_instance *ti; |
1010 | ||
1a60d4c5 | 1011 | mutex_lock(®ister_mutex); |
c461482c | 1012 | list_del_init(&timer->device_list); |
230323da TI |
1013 | /* wake up pending sleepers */ |
1014 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
1015 | if (ti->disconnect) |
1016 | ti->disconnect(ti); | |
230323da | 1017 | } |
1a60d4c5 | 1018 | mutex_unlock(®ister_mutex); |
c461482c | 1019 | return 0; |
1da177e4 LT |
1020 | } |
1021 | ||
53d2f744 | 1022 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
1023 | { |
1024 | unsigned long flags; | |
1025 | unsigned long resolution = 0; | |
53d2f744 | 1026 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 1027 | |
230323da TI |
1028 | if (timer->card && timer->card->shutdown) |
1029 | return; | |
7c22f1aa TI |
1030 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
1031 | return; | |
7eaa943c TI |
1032 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
1033 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
1034 | return; | |
1da177e4 | 1035 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
1036 | if (event == SNDRV_TIMER_EVENT_MSTART || |
1037 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
1038 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
1039 | if (timer->hw.c_resolution) |
1040 | resolution = timer->hw.c_resolution(timer); | |
1041 | else | |
1042 | resolution = timer->hw.resolution; | |
1043 | } | |
9244b2c3 | 1044 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
1045 | if (ti->ccallback) |
1046 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 1047 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
1048 | if (ts->ccallback) |
1049 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
1050 | } |
1051 | spin_unlock_irqrestore(&timer->lock, flags); | |
1052 | } | |
98856392 | 1053 | EXPORT_SYMBOL(snd_timer_notify); |
1da177e4 LT |
1054 | |
1055 | /* | |
1056 | * exported functions for global timers | |
1057 | */ | |
53d2f744 | 1058 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 1059 | { |
53d2f744 | 1060 | struct snd_timer_id tid; |
6b172a85 | 1061 | |
1da177e4 LT |
1062 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
1063 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1064 | tid.card = -1; | |
1065 | tid.device = device; | |
1066 | tid.subdevice = 0; | |
1067 | return snd_timer_new(NULL, id, &tid, rtimer); | |
1068 | } | |
98856392 | 1069 | EXPORT_SYMBOL(snd_timer_global_new); |
1da177e4 | 1070 | |
53d2f744 | 1071 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
1072 | { |
1073 | return snd_timer_free(timer); | |
1074 | } | |
98856392 | 1075 | EXPORT_SYMBOL(snd_timer_global_free); |
1da177e4 | 1076 | |
53d2f744 | 1077 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 1078 | { |
53d2f744 | 1079 | struct snd_device dev; |
1da177e4 LT |
1080 | |
1081 | memset(&dev, 0, sizeof(dev)); | |
1082 | dev.device_data = timer; | |
1083 | return snd_timer_dev_register(&dev); | |
1084 | } | |
98856392 | 1085 | EXPORT_SYMBOL(snd_timer_global_register); |
1da177e4 | 1086 | |
6b172a85 | 1087 | /* |
1da177e4 LT |
1088 | * System timer |
1089 | */ | |
1090 | ||
1091 | struct snd_timer_system_private { | |
1092 | struct timer_list tlist; | |
38e9a80f | 1093 | struct snd_timer *snd_timer; |
1da177e4 LT |
1094 | unsigned long last_expires; |
1095 | unsigned long last_jiffies; | |
1096 | unsigned long correction; | |
1097 | }; | |
1098 | ||
38e9a80f | 1099 | static void snd_timer_s_function(struct timer_list *t) |
1da177e4 | 1100 | { |
38e9a80f KC |
1101 | struct snd_timer_system_private *priv = from_timer(priv, t, |
1102 | tlist); | |
1103 | struct snd_timer *timer = priv->snd_timer; | |
1da177e4 LT |
1104 | unsigned long jiff = jiffies; |
1105 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1106 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1107 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1108 | } | |
1109 | ||
53d2f744 | 1110 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1111 | { |
1112 | struct snd_timer_system_private *priv; | |
1113 | unsigned long njiff; | |
1114 | ||
1115 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1116 | njiff = (priv->last_jiffies = jiffies); | |
1117 | if (priv->correction > timer->sticks - 1) { | |
1118 | priv->correction -= timer->sticks - 1; | |
1119 | njiff++; | |
1120 | } else { | |
1121 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1122 | priv->correction = 0; |
1da177e4 | 1123 | } |
4a07083e TI |
1124 | priv->last_expires = njiff; |
1125 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1126 | return 0; |
1127 | } | |
1128 | ||
53d2f744 | 1129 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1130 | { |
1131 | struct snd_timer_system_private *priv; | |
1132 | unsigned long jiff; | |
1133 | ||
1134 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1135 | del_timer(&priv->tlist); | |
1136 | jiff = jiffies; | |
1137 | if (time_before(jiff, priv->last_expires)) | |
1138 | timer->sticks = priv->last_expires - jiff; | |
1139 | else | |
1140 | timer->sticks = 1; | |
de2696d8 | 1141 | priv->correction = 0; |
1da177e4 LT |
1142 | return 0; |
1143 | } | |
1144 | ||
f146357f TI |
1145 | static int snd_timer_s_close(struct snd_timer *timer) |
1146 | { | |
1147 | struct snd_timer_system_private *priv; | |
1148 | ||
1149 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1150 | del_timer_sync(&priv->tlist); | |
1151 | return 0; | |
1152 | } | |
1153 | ||
53d2f744 | 1154 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1155 | { |
1156 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1157 | .resolution = 1000000000L / HZ, | |
1158 | .ticks = 10000000L, | |
f146357f | 1159 | .close = snd_timer_s_close, |
1da177e4 LT |
1160 | .start = snd_timer_s_start, |
1161 | .stop = snd_timer_s_stop | |
1162 | }; | |
1163 | ||
53d2f744 | 1164 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1165 | { |
1166 | kfree(timer->private_data); | |
1167 | } | |
1168 | ||
1169 | static int snd_timer_register_system(void) | |
1170 | { | |
53d2f744 | 1171 | struct snd_timer *timer; |
1da177e4 LT |
1172 | struct snd_timer_system_private *priv; |
1173 | int err; | |
1174 | ||
6b172a85 CL |
1175 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1176 | if (err < 0) | |
1da177e4 LT |
1177 | return err; |
1178 | strcpy(timer->name, "system timer"); | |
1179 | timer->hw = snd_timer_system; | |
ca2c0966 | 1180 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1181 | if (priv == NULL) { |
1182 | snd_timer_free(timer); | |
1183 | return -ENOMEM; | |
1184 | } | |
38e9a80f KC |
1185 | priv->snd_timer = timer; |
1186 | timer_setup(&priv->tlist, snd_timer_s_function, 0); | |
1da177e4 LT |
1187 | timer->private_data = priv; |
1188 | timer->private_free = snd_timer_free_system; | |
1189 | return snd_timer_global_register(timer); | |
1190 | } | |
1191 | ||
cd6a6503 | 1192 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1193 | /* |
1194 | * Info interface | |
1195 | */ | |
1196 | ||
53d2f744 TI |
1197 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1198 | struct snd_info_buffer *buffer) | |
1da177e4 | 1199 | { |
53d2f744 TI |
1200 | struct snd_timer *timer; |
1201 | struct snd_timer_instance *ti; | |
1da177e4 | 1202 | |
1a60d4c5 | 1203 | mutex_lock(®ister_mutex); |
9244b2c3 | 1204 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1205 | if (timer->card && timer->card->shutdown) |
1206 | continue; | |
1da177e4 LT |
1207 | switch (timer->tmr_class) { |
1208 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1209 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1210 | break; | |
1211 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1212 | snd_iprintf(buffer, "C%i-%i: ", |
1213 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1214 | break; |
1215 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1216 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1217 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1218 | break; |
1219 | default: | |
6b172a85 CL |
1220 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1221 | timer->card ? timer->card->number : -1, | |
1222 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1223 | } |
1224 | snd_iprintf(buffer, "%s :", timer->name); | |
1225 | if (timer->hw.resolution) | |
6b172a85 CL |
1226 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1227 | timer->hw.resolution / 1000, | |
1228 | timer->hw.resolution % 1000, | |
1229 | timer->hw.ticks); | |
1da177e4 LT |
1230 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1231 | snd_iprintf(buffer, " SLAVE"); | |
1232 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1233 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1234 | snd_iprintf(buffer, " Client %s : %s\n", |
1235 | ti->owner ? ti->owner : "unknown", | |
1236 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1237 | SNDRV_TIMER_IFLG_RUNNING) | |
1238 | ? "running" : "stopped"); | |
1da177e4 | 1239 | } |
1a60d4c5 | 1240 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1241 | } |
1242 | ||
6581f4e7 | 1243 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1244 | |
1245 | static void __init snd_timer_proc_init(void) | |
1246 | { | |
1247 | struct snd_info_entry *entry; | |
1248 | ||
1249 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1250 | if (entry != NULL) { | |
e28563cc TI |
1251 | entry->c.text.read = snd_timer_proc_read; |
1252 | if (snd_info_register(entry) < 0) { | |
1253 | snd_info_free_entry(entry); | |
1254 | entry = NULL; | |
1255 | } | |
1256 | } | |
1257 | snd_timer_proc_entry = entry; | |
1258 | } | |
1259 | ||
1260 | static void __exit snd_timer_proc_done(void) | |
1261 | { | |
746d4a02 | 1262 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1263 | } |
cd6a6503 | 1264 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1265 | #define snd_timer_proc_init() |
1266 | #define snd_timer_proc_done() | |
1267 | #endif | |
1268 | ||
1da177e4 LT |
1269 | /* |
1270 | * USER SPACE interface | |
1271 | */ | |
1272 | ||
53d2f744 | 1273 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1274 | unsigned long resolution, |
1275 | unsigned long ticks) | |
1276 | { | |
53d2f744 TI |
1277 | struct snd_timer_user *tu = timeri->callback_data; |
1278 | struct snd_timer_read *r; | |
1da177e4 | 1279 | int prev; |
6b172a85 | 1280 | |
1da177e4 LT |
1281 | spin_lock(&tu->qlock); |
1282 | if (tu->qused > 0) { | |
1283 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1284 | r = &tu->queue[prev]; | |
1285 | if (r->resolution == resolution) { | |
1286 | r->ticks += ticks; | |
1287 | goto __wake; | |
1288 | } | |
1289 | } | |
1290 | if (tu->qused >= tu->queue_size) { | |
1291 | tu->overrun++; | |
1292 | } else { | |
1293 | r = &tu->queue[tu->qtail++]; | |
1294 | tu->qtail %= tu->queue_size; | |
1295 | r->resolution = resolution; | |
1296 | r->ticks = ticks; | |
1297 | tu->qused++; | |
1298 | } | |
1299 | __wake: | |
1300 | spin_unlock(&tu->qlock); | |
1301 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1302 | wake_up(&tu->qchange_sleep); | |
1303 | } | |
1304 | ||
53d2f744 TI |
1305 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1306 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1307 | { |
1308 | if (tu->qused >= tu->queue_size) { | |
1309 | tu->overrun++; | |
1310 | } else { | |
1311 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1312 | tu->qtail %= tu->queue_size; | |
1313 | tu->qused++; | |
1314 | } | |
1315 | } | |
1316 | ||
53d2f744 TI |
1317 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1318 | int event, | |
1da177e4 LT |
1319 | struct timespec *tstamp, |
1320 | unsigned long resolution) | |
1321 | { | |
53d2f744 TI |
1322 | struct snd_timer_user *tu = timeri->callback_data; |
1323 | struct snd_timer_tread r1; | |
bfe70783 | 1324 | unsigned long flags; |
1da177e4 | 1325 | |
6b172a85 CL |
1326 | if (event >= SNDRV_TIMER_EVENT_START && |
1327 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1328 | tu->tstamp = *tstamp; |
1329 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1330 | return; | |
9a47e9cf | 1331 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1332 | r1.event = event; |
1333 | r1.tstamp = *tstamp; | |
1334 | r1.val = resolution; | |
bfe70783 | 1335 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1336 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1337 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1338 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1339 | wake_up(&tu->qchange_sleep); | |
1340 | } | |
1341 | ||
40ed9444 TI |
1342 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1343 | { | |
1344 | struct snd_timer_user *tu = timeri->callback_data; | |
1345 | ||
1346 | tu->disconnected = true; | |
1347 | wake_up(&tu->qchange_sleep); | |
1348 | } | |
1349 | ||
53d2f744 | 1350 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1351 | unsigned long resolution, |
1352 | unsigned long ticks) | |
1353 | { | |
53d2f744 TI |
1354 | struct snd_timer_user *tu = timeri->callback_data; |
1355 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1356 | struct timespec tstamp; |
1357 | int prev, append = 0; | |
1358 | ||
a8c006aa | 1359 | memset(&r1, 0, sizeof(r1)); |
07799e75 | 1360 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1361 | spin_lock(&tu->qlock); |
6b172a85 CL |
1362 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1363 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1364 | spin_unlock(&tu->qlock); |
1365 | return; | |
1366 | } | |
b751eef1 JK |
1367 | if (tu->last_resolution != resolution || ticks > 0) { |
1368 | if (timer_tstamp_monotonic) | |
26204e04 | 1369 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1370 | else |
1371 | getnstimeofday(&tstamp); | |
1372 | } | |
6b172a85 CL |
1373 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1374 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1375 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1376 | r1.tstamp = tstamp; | |
1377 | r1.val = resolution; | |
1378 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1379 | tu->last_resolution = resolution; | |
1380 | append++; | |
1381 | } | |
1382 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1383 | goto __wake; | |
1384 | if (ticks == 0) | |
1385 | goto __wake; | |
1386 | if (tu->qused > 0) { | |
1387 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1388 | r = &tu->tqueue[prev]; | |
1389 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1390 | r->tstamp = tstamp; | |
1391 | r->val += ticks; | |
1392 | append++; | |
1393 | goto __wake; | |
1394 | } | |
1395 | } | |
1396 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1397 | r1.tstamp = tstamp; | |
1398 | r1.val = ticks; | |
1399 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1400 | append++; | |
1401 | __wake: | |
1402 | spin_unlock(&tu->qlock); | |
1403 | if (append == 0) | |
1404 | return; | |
1405 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1406 | wake_up(&tu->qchange_sleep); | |
1407 | } | |
1408 | ||
890e2cb5 TI |
1409 | static int realloc_user_queue(struct snd_timer_user *tu, int size) |
1410 | { | |
1411 | struct snd_timer_read *queue = NULL; | |
1412 | struct snd_timer_tread *tqueue = NULL; | |
1413 | ||
1414 | if (tu->tread) { | |
1415 | tqueue = kcalloc(size, sizeof(*tqueue), GFP_KERNEL); | |
1416 | if (!tqueue) | |
1417 | return -ENOMEM; | |
1418 | } else { | |
1419 | queue = kcalloc(size, sizeof(*queue), GFP_KERNEL); | |
1420 | if (!queue) | |
1421 | return -ENOMEM; | |
1422 | } | |
1423 | ||
1424 | spin_lock_irq(&tu->qlock); | |
1425 | kfree(tu->queue); | |
1426 | kfree(tu->tqueue); | |
1427 | tu->queue_size = size; | |
1428 | tu->queue = queue; | |
1429 | tu->tqueue = tqueue; | |
1430 | tu->qhead = tu->qtail = tu->qused = 0; | |
1431 | spin_unlock_irq(&tu->qlock); | |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
1da177e4 LT |
1436 | static int snd_timer_user_open(struct inode *inode, struct file *file) |
1437 | { | |
53d2f744 | 1438 | struct snd_timer_user *tu; |
02f4865f TI |
1439 | int err; |
1440 | ||
1441 | err = nonseekable_open(inode, file); | |
1442 | if (err < 0) | |
1443 | return err; | |
6b172a85 | 1444 | |
ca2c0966 | 1445 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1446 | if (tu == NULL) |
1447 | return -ENOMEM; | |
1448 | spin_lock_init(&tu->qlock); | |
1449 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1450 | mutex_init(&tu->ioctl_lock); |
1da177e4 | 1451 | tu->ticks = 1; |
890e2cb5 | 1452 | if (realloc_user_queue(tu, 128) < 0) { |
1da177e4 LT |
1453 | kfree(tu); |
1454 | return -ENOMEM; | |
1455 | } | |
1456 | file->private_data = tu; | |
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1461 | { | |
53d2f744 | 1462 | struct snd_timer_user *tu; |
1da177e4 LT |
1463 | |
1464 | if (file->private_data) { | |
1465 | tu = file->private_data; | |
1466 | file->private_data = NULL; | |
af368027 | 1467 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1468 | if (tu->timeri) |
1469 | snd_timer_close(tu->timeri); | |
af368027 | 1470 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1471 | kfree(tu->queue); |
1472 | kfree(tu->tqueue); | |
1473 | kfree(tu); | |
1474 | } | |
1475 | return 0; | |
1476 | } | |
1477 | ||
53d2f744 | 1478 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1479 | { |
1480 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1481 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1482 | id->card = -1; | |
1483 | id->device = -1; | |
1484 | id->subdevice = -1; | |
1485 | } | |
1486 | ||
53d2f744 | 1487 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1488 | { |
1489 | id->dev_class = timer->tmr_class; | |
1490 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1491 | id->card = timer->card ? timer->card->number : -1; | |
1492 | id->device = timer->tmr_device; | |
1493 | id->subdevice = timer->tmr_subdevice; | |
1494 | } | |
1495 | ||
53d2f744 | 1496 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1497 | { |
53d2f744 TI |
1498 | struct snd_timer_id id; |
1499 | struct snd_timer *timer; | |
1da177e4 | 1500 | struct list_head *p; |
6b172a85 | 1501 | |
1da177e4 LT |
1502 | if (copy_from_user(&id, _tid, sizeof(id))) |
1503 | return -EFAULT; | |
1a60d4c5 | 1504 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1505 | if (id.dev_class < 0) { /* first item */ |
1506 | if (list_empty(&snd_timer_list)) | |
1507 | snd_timer_user_zero_id(&id); | |
1508 | else { | |
9dfba380 | 1509 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1510 | struct snd_timer, device_list); |
1da177e4 LT |
1511 | snd_timer_user_copy_id(&id, timer); |
1512 | } | |
1513 | } else { | |
1514 | switch (id.dev_class) { | |
1515 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1516 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1517 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1518 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1519 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1520 | snd_timer_user_copy_id(&id, timer); | |
1521 | break; | |
1522 | } | |
1523 | if (timer->tmr_device >= id.device) { | |
1524 | snd_timer_user_copy_id(&id, timer); | |
1525 | break; | |
1526 | } | |
1527 | } | |
1528 | if (p == &snd_timer_list) | |
1529 | snd_timer_user_zero_id(&id); | |
1530 | break; | |
1531 | case SNDRV_TIMER_CLASS_CARD: | |
1532 | case SNDRV_TIMER_CLASS_PCM: | |
1533 | if (id.card < 0) { | |
1534 | id.card = 0; | |
1535 | } else { | |
e8ed6820 DC |
1536 | if (id.device < 0) { |
1537 | id.device = 0; | |
1da177e4 | 1538 | } else { |
e8ed6820 DC |
1539 | if (id.subdevice < 0) |
1540 | id.subdevice = 0; | |
f8b37fd0 | 1541 | else if (id.subdevice < INT_MAX) |
e8ed6820 | 1542 | id.subdevice++; |
1da177e4 LT |
1543 | } |
1544 | } | |
1545 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1546 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1547 | if (timer->tmr_class > id.dev_class) { |
1548 | snd_timer_user_copy_id(&id, timer); | |
1549 | break; | |
1550 | } | |
1551 | if (timer->tmr_class < id.dev_class) | |
1552 | continue; | |
1553 | if (timer->card->number > id.card) { | |
1554 | snd_timer_user_copy_id(&id, timer); | |
1555 | break; | |
1556 | } | |
1557 | if (timer->card->number < id.card) | |
1558 | continue; | |
1559 | if (timer->tmr_device > id.device) { | |
1560 | snd_timer_user_copy_id(&id, timer); | |
1561 | break; | |
1562 | } | |
1563 | if (timer->tmr_device < id.device) | |
1564 | continue; | |
1565 | if (timer->tmr_subdevice > id.subdevice) { | |
1566 | snd_timer_user_copy_id(&id, timer); | |
1567 | break; | |
1568 | } | |
1569 | if (timer->tmr_subdevice < id.subdevice) | |
1570 | continue; | |
1571 | snd_timer_user_copy_id(&id, timer); | |
1572 | break; | |
1573 | } | |
1574 | if (p == &snd_timer_list) | |
1575 | snd_timer_user_zero_id(&id); | |
1576 | break; | |
1577 | default: | |
1578 | snd_timer_user_zero_id(&id); | |
1579 | } | |
1580 | } | |
1a60d4c5 | 1581 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1582 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1583 | return -EFAULT; | |
1584 | return 0; | |
6b172a85 | 1585 | } |
1da177e4 | 1586 | |
6b172a85 | 1587 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1588 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1589 | { |
53d2f744 TI |
1590 | struct snd_timer_ginfo *ginfo; |
1591 | struct snd_timer_id tid; | |
1592 | struct snd_timer *t; | |
1da177e4 LT |
1593 | struct list_head *p; |
1594 | int err = 0; | |
1595 | ||
ef44a1ec LZ |
1596 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1597 | if (IS_ERR(ginfo)) | |
1598 | return PTR_ERR(ginfo); | |
1599 | ||
1da177e4 LT |
1600 | tid = ginfo->tid; |
1601 | memset(ginfo, 0, sizeof(*ginfo)); | |
1602 | ginfo->tid = tid; | |
1a60d4c5 | 1603 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1604 | t = snd_timer_find(&tid); |
1605 | if (t != NULL) { | |
1606 | ginfo->card = t->card ? t->card->number : -1; | |
1607 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1608 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1609 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1610 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1611 | ginfo->resolution = t->hw.resolution; | |
1612 | if (t->hw.resolution_min > 0) { | |
1613 | ginfo->resolution_min = t->hw.resolution_min; | |
1614 | ginfo->resolution_max = t->hw.resolution_max; | |
1615 | } | |
1616 | list_for_each(p, &t->open_list_head) { | |
1617 | ginfo->clients++; | |
1618 | } | |
1619 | } else { | |
1620 | err = -ENODEV; | |
1621 | } | |
1a60d4c5 | 1622 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1623 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1624 | err = -EFAULT; | |
1625 | kfree(ginfo); | |
1626 | return err; | |
1627 | } | |
1628 | ||
91d2178e | 1629 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1630 | { |
53d2f744 | 1631 | struct snd_timer *t; |
1da177e4 LT |
1632 | int err; |
1633 | ||
1a60d4c5 | 1634 | mutex_lock(®ister_mutex); |
91d2178e | 1635 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1636 | if (!t) { |
1da177e4 | 1637 | err = -ENODEV; |
6b172a85 CL |
1638 | goto _error; |
1639 | } | |
1640 | if (!list_empty(&t->open_list_head)) { | |
1641 | err = -EBUSY; | |
1642 | goto _error; | |
1643 | } | |
1644 | if (!t->hw.set_period) { | |
1645 | err = -ENOSYS; | |
1646 | goto _error; | |
1da177e4 | 1647 | } |
91d2178e | 1648 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1649 | _error: |
1a60d4c5 | 1650 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1651 | return err; |
1652 | } | |
1653 | ||
91d2178e TS |
1654 | static int snd_timer_user_gparams(struct file *file, |
1655 | struct snd_timer_gparams __user *_gparams) | |
1656 | { | |
1657 | struct snd_timer_gparams gparams; | |
1658 | ||
1659 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1660 | return -EFAULT; | |
1661 | return timer_set_gparams(&gparams); | |
1662 | } | |
1663 | ||
6b172a85 | 1664 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1665 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1666 | { |
53d2f744 TI |
1667 | struct snd_timer_gstatus gstatus; |
1668 | struct snd_timer_id tid; | |
1669 | struct snd_timer *t; | |
1da177e4 LT |
1670 | int err = 0; |
1671 | ||
1672 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1673 | return -EFAULT; | |
1674 | tid = gstatus.tid; | |
1675 | memset(&gstatus, 0, sizeof(gstatus)); | |
1676 | gstatus.tid = tid; | |
1a60d4c5 | 1677 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1678 | t = snd_timer_find(&tid); |
1679 | if (t != NULL) { | |
1680 | if (t->hw.c_resolution) | |
1681 | gstatus.resolution = t->hw.c_resolution(t); | |
1682 | else | |
1683 | gstatus.resolution = t->hw.resolution; | |
1684 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1685 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1686 | &gstatus.resolution_den); | |
1da177e4 LT |
1687 | } else { |
1688 | gstatus.resolution_num = gstatus.resolution; | |
1689 | gstatus.resolution_den = 1000000000uL; | |
1690 | } | |
1691 | } else { | |
1692 | err = -ENODEV; | |
1693 | } | |
1a60d4c5 | 1694 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1695 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1696 | err = -EFAULT; | |
1697 | return err; | |
1698 | } | |
1699 | ||
6b172a85 | 1700 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1701 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1702 | { |
53d2f744 TI |
1703 | struct snd_timer_user *tu; |
1704 | struct snd_timer_select tselect; | |
1da177e4 | 1705 | char str[32]; |
c1935b4d | 1706 | int err = 0; |
6b172a85 | 1707 | |
1da177e4 | 1708 | tu = file->private_data; |
c1935b4d | 1709 | if (tu->timeri) { |
1da177e4 | 1710 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1711 | tu->timeri = NULL; |
1712 | } | |
1713 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1714 | err = -EFAULT; | |
1715 | goto __err; | |
1716 | } | |
1da177e4 LT |
1717 | sprintf(str, "application %i", current->pid); |
1718 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1719 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1720 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1721 | if (err < 0) | |
c1935b4d | 1722 | goto __err; |
1da177e4 | 1723 | |
890e2cb5 TI |
1724 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; |
1725 | tu->timeri->callback = tu->tread | |
6b172a85 | 1726 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; |
890e2cb5 TI |
1727 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1728 | tu->timeri->callback_data = (void *)tu; | |
1729 | tu->timeri->disconnect = snd_timer_user_disconnect; | |
c1935b4d JK |
1730 | |
1731 | __err: | |
c1935b4d | 1732 | return err; |
1da177e4 LT |
1733 | } |
1734 | ||
6b172a85 | 1735 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1736 | struct snd_timer_info __user *_info) |
1da177e4 | 1737 | { |
53d2f744 TI |
1738 | struct snd_timer_user *tu; |
1739 | struct snd_timer_info *info; | |
1740 | struct snd_timer *t; | |
1da177e4 LT |
1741 | int err = 0; |
1742 | ||
1743 | tu = file->private_data; | |
7c64ec34 CL |
1744 | if (!tu->timeri) |
1745 | return -EBADFD; | |
1da177e4 | 1746 | t = tu->timeri->timer; |
7c64ec34 CL |
1747 | if (!t) |
1748 | return -EBADFD; | |
1da177e4 | 1749 | |
ca2c0966 | 1750 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1751 | if (! info) |
1752 | return -ENOMEM; | |
1753 | info->card = t->card ? t->card->number : -1; | |
1754 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1755 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1756 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1757 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1758 | info->resolution = t->hw.resolution; | |
1759 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1760 | err = -EFAULT; | |
1761 | kfree(info); | |
1762 | return err; | |
1763 | } | |
1764 | ||
6b172a85 | 1765 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1766 | struct snd_timer_params __user *_params) |
1da177e4 | 1767 | { |
53d2f744 TI |
1768 | struct snd_timer_user *tu; |
1769 | struct snd_timer_params params; | |
1770 | struct snd_timer *t; | |
1da177e4 | 1771 | int err; |
6b172a85 | 1772 | |
1da177e4 | 1773 | tu = file->private_data; |
7c64ec34 CL |
1774 | if (!tu->timeri) |
1775 | return -EBADFD; | |
1da177e4 | 1776 | t = tu->timeri->timer; |
7c64ec34 CL |
1777 | if (!t) |
1778 | return -EBADFD; | |
1da177e4 LT |
1779 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1780 | return -EFAULT; | |
71321eb3 TI |
1781 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { |
1782 | u64 resolution; | |
1783 | ||
1784 | if (params.ticks < 1) { | |
1785 | err = -EINVAL; | |
1786 | goto _end; | |
1787 | } | |
1788 | ||
1789 | /* Don't allow resolution less than 1ms */ | |
1790 | resolution = snd_timer_resolution(tu->timeri); | |
1791 | resolution *= params.ticks; | |
1792 | if (resolution < 1000000) { | |
1793 | err = -EINVAL; | |
1794 | goto _end; | |
1795 | } | |
1da177e4 | 1796 | } |
6b172a85 CL |
1797 | if (params.queue_size > 0 && |
1798 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1799 | err = -EINVAL; |
1800 | goto _end; | |
1801 | } | |
1802 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1803 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1804 | (1<<SNDRV_TIMER_EVENT_START)| | |
1805 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1806 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1807 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1808 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1809 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1810 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1811 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1812 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1813 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1814 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1815 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1816 | err = -EINVAL; |
1817 | goto _end; | |
1818 | } | |
1819 | snd_timer_stop(tu->timeri); | |
1820 | spin_lock_irq(&t->lock); | |
1821 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1822 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1823 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1824 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1825 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1826 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1827 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1828 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1829 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1830 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1831 | if (params.queue_size > 0 && |
1832 | (unsigned int)tu->queue_size != params.queue_size) { | |
890e2cb5 TI |
1833 | err = realloc_user_queue(tu, params.queue_size); |
1834 | if (err < 0) | |
1835 | goto _end; | |
1da177e4 | 1836 | } |
d7f910bf | 1837 | spin_lock_irq(&tu->qlock); |
1da177e4 LT |
1838 | tu->qhead = tu->qtail = tu->qused = 0; |
1839 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1840 | if (tu->tread) { | |
53d2f744 | 1841 | struct snd_timer_tread tread; |
cec8f96e | 1842 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1843 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1844 | tread.tstamp.tv_sec = 0; | |
1845 | tread.tstamp.tv_nsec = 0; | |
1846 | tread.val = 0; | |
1847 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1848 | } else { | |
53d2f744 | 1849 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1850 | r->resolution = 0; |
1851 | r->ticks = 0; | |
1852 | tu->qused++; | |
1853 | tu->qtail++; | |
1854 | } | |
1da177e4 LT |
1855 | } |
1856 | tu->filter = params.filter; | |
1857 | tu->ticks = params.ticks; | |
d7f910bf | 1858 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1859 | err = 0; |
1860 | _end: | |
1861 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1862 | return -EFAULT; | |
1863 | return err; | |
1864 | } | |
1865 | ||
6b172a85 | 1866 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1867 | struct snd_timer_status __user *_status) |
1da177e4 | 1868 | { |
53d2f744 TI |
1869 | struct snd_timer_user *tu; |
1870 | struct snd_timer_status status; | |
6b172a85 | 1871 | |
1da177e4 | 1872 | tu = file->private_data; |
7c64ec34 CL |
1873 | if (!tu->timeri) |
1874 | return -EBADFD; | |
1da177e4 LT |
1875 | memset(&status, 0, sizeof(status)); |
1876 | status.tstamp = tu->tstamp; | |
1877 | status.resolution = snd_timer_resolution(tu->timeri); | |
1878 | status.lost = tu->timeri->lost; | |
1879 | status.overrun = tu->overrun; | |
1880 | spin_lock_irq(&tu->qlock); | |
1881 | status.queue = tu->qused; | |
1882 | spin_unlock_irq(&tu->qlock); | |
1883 | if (copy_to_user(_status, &status, sizeof(status))) | |
1884 | return -EFAULT; | |
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | static int snd_timer_user_start(struct file *file) | |
1889 | { | |
1890 | int err; | |
53d2f744 | 1891 | struct snd_timer_user *tu; |
6b172a85 | 1892 | |
1da177e4 | 1893 | tu = file->private_data; |
7c64ec34 CL |
1894 | if (!tu->timeri) |
1895 | return -EBADFD; | |
1da177e4 LT |
1896 | snd_timer_stop(tu->timeri); |
1897 | tu->timeri->lost = 0; | |
1898 | tu->last_resolution = 0; | |
1899 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1900 | } | |
1901 | ||
1902 | static int snd_timer_user_stop(struct file *file) | |
1903 | { | |
1904 | int err; | |
53d2f744 | 1905 | struct snd_timer_user *tu; |
6b172a85 | 1906 | |
1da177e4 | 1907 | tu = file->private_data; |
7c64ec34 CL |
1908 | if (!tu->timeri) |
1909 | return -EBADFD; | |
1da177e4 LT |
1910 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1911 | } | |
1912 | ||
1913 | static int snd_timer_user_continue(struct file *file) | |
1914 | { | |
1915 | int err; | |
53d2f744 | 1916 | struct snd_timer_user *tu; |
6b172a85 | 1917 | |
1da177e4 | 1918 | tu = file->private_data; |
7c64ec34 CL |
1919 | if (!tu->timeri) |
1920 | return -EBADFD; | |
9f8a7658 TI |
1921 | /* start timer instead of continue if it's not used before */ |
1922 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
1923 | return snd_timer_user_start(file); | |
1da177e4 LT |
1924 | tu->timeri->lost = 0; |
1925 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1926 | } | |
1927 | ||
15790a6b TI |
1928 | static int snd_timer_user_pause(struct file *file) |
1929 | { | |
1930 | int err; | |
53d2f744 | 1931 | struct snd_timer_user *tu; |
6b172a85 | 1932 | |
15790a6b | 1933 | tu = file->private_data; |
7c64ec34 CL |
1934 | if (!tu->timeri) |
1935 | return -EBADFD; | |
d138b445 | 1936 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1937 | } |
1938 | ||
8c50b37c TI |
1939 | enum { |
1940 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1941 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1942 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1943 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1944 | }; | |
1945 | ||
af368027 | 1946 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1947 | unsigned long arg) |
1da177e4 | 1948 | { |
53d2f744 | 1949 | struct snd_timer_user *tu; |
1da177e4 LT |
1950 | void __user *argp = (void __user *)arg; |
1951 | int __user *p = argp; | |
6b172a85 | 1952 | |
1da177e4 LT |
1953 | tu = file->private_data; |
1954 | switch (cmd) { | |
1955 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1956 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1957 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1958 | return snd_timer_user_next_device(argp); | |
1959 | case SNDRV_TIMER_IOCTL_TREAD: | |
1960 | { | |
890e2cb5 | 1961 | int xarg, old_tread; |
6b172a85 | 1962 | |
af368027 | 1963 | if (tu->timeri) /* too late */ |
1da177e4 | 1964 | return -EBUSY; |
af368027 | 1965 | if (get_user(xarg, p)) |
1da177e4 | 1966 | return -EFAULT; |
890e2cb5 | 1967 | old_tread = tu->tread; |
1da177e4 | 1968 | tu->tread = xarg ? 1 : 0; |
890e2cb5 TI |
1969 | if (tu->tread != old_tread && |
1970 | realloc_user_queue(tu, tu->queue_size) < 0) { | |
1971 | tu->tread = old_tread; | |
1972 | return -ENOMEM; | |
1973 | } | |
1da177e4 LT |
1974 | return 0; |
1975 | } | |
1976 | case SNDRV_TIMER_IOCTL_GINFO: | |
1977 | return snd_timer_user_ginfo(file, argp); | |
1978 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1979 | return snd_timer_user_gparams(file, argp); | |
1980 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1981 | return snd_timer_user_gstatus(file, argp); | |
1982 | case SNDRV_TIMER_IOCTL_SELECT: | |
1983 | return snd_timer_user_tselect(file, argp); | |
1984 | case SNDRV_TIMER_IOCTL_INFO: | |
1985 | return snd_timer_user_info(file, argp); | |
1986 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1987 | return snd_timer_user_params(file, argp); | |
1988 | case SNDRV_TIMER_IOCTL_STATUS: | |
1989 | return snd_timer_user_status(file, argp); | |
1990 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1991 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1992 | return snd_timer_user_start(file); |
1993 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1994 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1995 | return snd_timer_user_stop(file); |
1996 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1997 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1998 | return snd_timer_user_continue(file); |
15790a6b | 1999 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 2000 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 2001 | return snd_timer_user_pause(file); |
1da177e4 LT |
2002 | } |
2003 | return -ENOTTY; | |
2004 | } | |
2005 | ||
af368027 TI |
2006 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
2007 | unsigned long arg) | |
2008 | { | |
2009 | struct snd_timer_user *tu = file->private_data; | |
2010 | long ret; | |
2011 | ||
2012 | mutex_lock(&tu->ioctl_lock); | |
2013 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
2014 | mutex_unlock(&tu->ioctl_lock); | |
2015 | return ret; | |
2016 | } | |
2017 | ||
1da177e4 LT |
2018 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
2019 | { | |
53d2f744 | 2020 | struct snd_timer_user *tu; |
6b172a85 | 2021 | |
1da177e4 | 2022 | tu = file->private_data; |
60aa4924 | 2023 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
2024 | } |
2025 | ||
6b172a85 CL |
2026 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
2027 | size_t count, loff_t *offset) | |
1da177e4 | 2028 | { |
53d2f744 | 2029 | struct snd_timer_user *tu; |
1da177e4 | 2030 | long result = 0, unit; |
4dff5c7b | 2031 | int qhead; |
1da177e4 | 2032 | int err = 0; |
6b172a85 | 2033 | |
1da177e4 | 2034 | tu = file->private_data; |
53d2f744 | 2035 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
d11662f4 | 2036 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2037 | spin_lock_irq(&tu->qlock); |
2038 | while ((long)count - result >= unit) { | |
2039 | while (!tu->qused) { | |
ac6424b9 | 2040 | wait_queue_entry_t wait; |
1da177e4 LT |
2041 | |
2042 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
2043 | err = -EAGAIN; | |
4dff5c7b | 2044 | goto _error; |
1da177e4 LT |
2045 | } |
2046 | ||
2047 | set_current_state(TASK_INTERRUPTIBLE); | |
2048 | init_waitqueue_entry(&wait, current); | |
2049 | add_wait_queue(&tu->qchange_sleep, &wait); | |
2050 | ||
2051 | spin_unlock_irq(&tu->qlock); | |
d11662f4 | 2052 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 | 2053 | schedule(); |
d11662f4 | 2054 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2055 | spin_lock_irq(&tu->qlock); |
2056 | ||
2057 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
2058 | ||
230323da TI |
2059 | if (tu->disconnected) { |
2060 | err = -ENODEV; | |
4dff5c7b | 2061 | goto _error; |
230323da | 2062 | } |
1da177e4 LT |
2063 | if (signal_pending(current)) { |
2064 | err = -ERESTARTSYS; | |
4dff5c7b | 2065 | goto _error; |
1da177e4 LT |
2066 | } |
2067 | } | |
2068 | ||
4dff5c7b TI |
2069 | qhead = tu->qhead++; |
2070 | tu->qhead %= tu->queue_size; | |
3fa6993f | 2071 | tu->qused--; |
1da177e4 | 2072 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2073 | |
2074 | if (tu->tread) { | |
4dff5c7b TI |
2075 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
2076 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 2077 | err = -EFAULT; |
1da177e4 | 2078 | } else { |
4dff5c7b TI |
2079 | if (copy_to_user(buffer, &tu->queue[qhead], |
2080 | sizeof(struct snd_timer_read))) | |
1da177e4 | 2081 | err = -EFAULT; |
1da177e4 LT |
2082 | } |
2083 | ||
1da177e4 | 2084 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
2085 | if (err < 0) |
2086 | goto _error; | |
2087 | result += unit; | |
2088 | buffer += unit; | |
1da177e4 | 2089 | } |
1da177e4 | 2090 | _error: |
4dff5c7b | 2091 | spin_unlock_irq(&tu->qlock); |
d11662f4 | 2092 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
2093 | return result > 0 ? result : err; |
2094 | } | |
2095 | ||
2096 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
2097 | { | |
2098 | unsigned int mask; | |
53d2f744 | 2099 | struct snd_timer_user *tu; |
1da177e4 LT |
2100 | |
2101 | tu = file->private_data; | |
2102 | ||
2103 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 2104 | |
1da177e4 | 2105 | mask = 0; |
d7f910bf | 2106 | spin_lock_irq(&tu->qlock); |
1da177e4 LT |
2107 | if (tu->qused) |
2108 | mask |= POLLIN | POLLRDNORM; | |
230323da TI |
2109 | if (tu->disconnected) |
2110 | mask |= POLLERR; | |
d7f910bf | 2111 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2112 | |
2113 | return mask; | |
2114 | } | |
2115 | ||
2116 | #ifdef CONFIG_COMPAT | |
2117 | #include "timer_compat.c" | |
2118 | #else | |
2119 | #define snd_timer_user_ioctl_compat NULL | |
2120 | #endif | |
2121 | ||
9c2e08c5 | 2122 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2123 | { |
2124 | .owner = THIS_MODULE, | |
2125 | .read = snd_timer_user_read, | |
2126 | .open = snd_timer_user_open, | |
2127 | .release = snd_timer_user_release, | |
02f4865f | 2128 | .llseek = no_llseek, |
1da177e4 LT |
2129 | .poll = snd_timer_user_poll, |
2130 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2131 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2132 | .fasync = snd_timer_user_fasync, | |
2133 | }; | |
2134 | ||
7c35860d TI |
2135 | /* unregister the system timer */ |
2136 | static void snd_timer_free_all(void) | |
2137 | { | |
2138 | struct snd_timer *timer, *n; | |
2139 | ||
2140 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2141 | snd_timer_free(timer); | |
2142 | } | |
2143 | ||
89da061f TI |
2144 | static struct device timer_dev; |
2145 | ||
1da177e4 LT |
2146 | /* |
2147 | * ENTRY functions | |
2148 | */ | |
2149 | ||
1da177e4 LT |
2150 | static int __init alsa_timer_init(void) |
2151 | { | |
2152 | int err; | |
1da177e4 | 2153 | |
89da061f TI |
2154 | snd_device_initialize(&timer_dev, NULL); |
2155 | dev_set_name(&timer_dev, "timer"); | |
2156 | ||
1da177e4 | 2157 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2158 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2159 | "system timer"); | |
1da177e4 | 2160 | #endif |
e28563cc | 2161 | |
7c35860d TI |
2162 | err = snd_timer_register_system(); |
2163 | if (err < 0) { | |
cf74dcf3 | 2164 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
1ae0e4ce | 2165 | goto put_timer; |
7c35860d TI |
2166 | } |
2167 | ||
40a4b263 TI |
2168 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2169 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2170 | if (err < 0) { |
cf74dcf3 | 2171 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2172 | snd_timer_free_all(); |
1ae0e4ce | 2173 | goto put_timer; |
7c35860d TI |
2174 | } |
2175 | ||
e28563cc | 2176 | snd_timer_proc_init(); |
1da177e4 | 2177 | return 0; |
1ae0e4ce ME |
2178 | |
2179 | put_timer: | |
2180 | put_device(&timer_dev); | |
2181 | return err; | |
1da177e4 LT |
2182 | } |
2183 | ||
2184 | static void __exit alsa_timer_exit(void) | |
2185 | { | |
40a4b263 | 2186 | snd_unregister_device(&timer_dev); |
7c35860d | 2187 | snd_timer_free_all(); |
89da061f | 2188 | put_device(&timer_dev); |
e28563cc | 2189 | snd_timer_proc_done(); |
1da177e4 LT |
2190 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2191 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2192 | #endif | |
2193 | } | |
2194 | ||
2195 | module_init(alsa_timer_init) | |
2196 | module_exit(alsa_timer_exit) |