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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/init.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
65a77217 | 28 | #include <linux/module.h> |
543537bd | 29 | #include <linux/string.h> |
1da177e4 LT |
30 | #include <sound/core.h> |
31 | #include <sound/timer.h> | |
32 | #include <sound/control.h> | |
33 | #include <sound/info.h> | |
34 | #include <sound/minors.h> | |
35 | #include <sound/initval.h> | |
36 | #include <linux/kmod.h> | |
1da177e4 | 37 | |
8eeaa2f9 | 38 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
109fef9e | 39 | #define DEFAULT_TIMER_LIMIT 4 |
1da177e4 LT |
40 | #else |
41 | #define DEFAULT_TIMER_LIMIT 1 | |
42 | #endif | |
43 | ||
44 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 45 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 46 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
47 | MODULE_DESCRIPTION("ALSA timer interface"); |
48 | MODULE_LICENSE("GPL"); | |
49 | module_param(timer_limit, int, 0444); | |
50 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
51 | module_param(timer_tstamp_monotonic, int, 0444); |
52 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 53 | |
03cfe6f5 KS |
54 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
55 | MODULE_ALIAS("devname:snd/timer"); | |
56 | ||
53d2f744 TI |
57 | struct snd_timer_user { |
58 | struct snd_timer_instance *timeri; | |
6b172a85 | 59 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
60 | unsigned long ticks; |
61 | unsigned long overrun; | |
62 | int qhead; | |
63 | int qtail; | |
64 | int qused; | |
65 | int queue_size; | |
230323da | 66 | bool disconnected; |
53d2f744 TI |
67 | struct snd_timer_read *queue; |
68 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
69 | spinlock_t qlock; |
70 | unsigned long last_resolution; | |
71 | unsigned int filter; | |
72 | struct timespec tstamp; /* trigger tstamp */ | |
73 | wait_queue_head_t qchange_sleep; | |
74 | struct fasync_struct *fasync; | |
af368027 | 75 | struct mutex ioctl_lock; |
53d2f744 | 76 | }; |
1da177e4 LT |
77 | |
78 | /* list of timers */ | |
79 | static LIST_HEAD(snd_timer_list); | |
80 | ||
81 | /* list of slave instances */ | |
82 | static LIST_HEAD(snd_timer_slave_list); | |
83 | ||
84 | /* lock for slave active lists */ | |
85 | static DEFINE_SPINLOCK(slave_active_lock); | |
86 | ||
1a60d4c5 | 87 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 88 | |
53d2f744 TI |
89 | static int snd_timer_free(struct snd_timer *timer); |
90 | static int snd_timer_dev_free(struct snd_device *device); | |
91 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 92 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 93 | |
53d2f744 | 94 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * create a timer instance with the given owner string. | |
98 | * when timer is not NULL, increments the module counter | |
99 | */ | |
53d2f744 TI |
100 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
101 | struct snd_timer *timer) | |
1da177e4 | 102 | { |
53d2f744 | 103 | struct snd_timer_instance *timeri; |
ca2c0966 | 104 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
105 | if (timeri == NULL) |
106 | return NULL; | |
543537bd | 107 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
108 | if (! timeri->owner) { |
109 | kfree(timeri); | |
110 | return NULL; | |
111 | } | |
112 | INIT_LIST_HEAD(&timeri->open_list); | |
113 | INIT_LIST_HEAD(&timeri->active_list); | |
114 | INIT_LIST_HEAD(&timeri->ack_list); | |
115 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
116 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
117 | ||
118 | timeri->timer = timer; | |
de24214d | 119 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
120 | kfree(timeri->owner); |
121 | kfree(timeri); | |
122 | return NULL; | |
123 | } | |
124 | ||
125 | return timeri; | |
126 | } | |
127 | ||
128 | /* | |
129 | * find a timer instance from the given timer id | |
130 | */ | |
53d2f744 | 131 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 132 | { |
53d2f744 | 133 | struct snd_timer *timer = NULL; |
1da177e4 | 134 | |
9244b2c3 | 135 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
136 | if (timer->tmr_class != tid->dev_class) |
137 | continue; | |
138 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
139 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
140 | (timer->card == NULL || | |
141 | timer->card->number != tid->card)) | |
142 | continue; | |
143 | if (timer->tmr_device != tid->device) | |
144 | continue; | |
145 | if (timer->tmr_subdevice != tid->subdevice) | |
146 | continue; | |
147 | return timer; | |
148 | } | |
149 | return NULL; | |
150 | } | |
151 | ||
ee2da997 | 152 | #ifdef CONFIG_MODULES |
1da177e4 | 153 | |
53d2f744 | 154 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 155 | { |
1da177e4 LT |
156 | switch (tid->dev_class) { |
157 | case SNDRV_TIMER_CLASS_GLOBAL: | |
158 | if (tid->device < timer_limit) | |
159 | request_module("snd-timer-%i", tid->device); | |
160 | break; | |
161 | case SNDRV_TIMER_CLASS_CARD: | |
162 | case SNDRV_TIMER_CLASS_PCM: | |
163 | if (tid->card < snd_ecards_limit) | |
164 | request_module("snd-card-%i", tid->card); | |
165 | break; | |
166 | default: | |
167 | break; | |
168 | } | |
169 | } | |
170 | ||
171 | #endif | |
172 | ||
173 | /* | |
174 | * look for a master instance matching with the slave id of the given slave. | |
175 | * when found, relink the open_link of the slave. | |
176 | * | |
177 | * call this with register_mutex down. | |
178 | */ | |
53d2f744 | 179 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 180 | { |
53d2f744 TI |
181 | struct snd_timer *timer; |
182 | struct snd_timer_instance *master; | |
1da177e4 LT |
183 | |
184 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
185 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
186 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
187 | if (slave->slave_class == master->slave_class && |
188 | slave->slave_id == master->slave_id) { | |
5b7c757d NK |
189 | list_move_tail(&slave->open_list, |
190 | &master->slave_list_head); | |
1da177e4 LT |
191 | spin_lock_irq(&slave_active_lock); |
192 | slave->master = master; | |
193 | slave->timer = master->timer; | |
194 | spin_unlock_irq(&slave_active_lock); | |
195 | return; | |
196 | } | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | /* | |
202 | * look for slave instances matching with the slave id of the given master. | |
203 | * when found, relink the open_link of slaves. | |
204 | * | |
205 | * call this with register_mutex down. | |
206 | */ | |
53d2f744 | 207 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 208 | { |
9244b2c3 | 209 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
210 | |
211 | /* check all pending slaves */ | |
9244b2c3 | 212 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
213 | if (slave->slave_class == master->slave_class && |
214 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 215 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 | 216 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 217 | spin_lock(&master->timer->lock); |
1da177e4 LT |
218 | slave->master = master; |
219 | slave->timer = master->timer; | |
220 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
221 | list_add_tail(&slave->active_list, |
222 | &master->slave_active_head); | |
b5a663aa | 223 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
224 | spin_unlock_irq(&slave_active_lock); |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | /* | |
230 | * open a timer instance | |
231 | * when opening a master, the slave id must be here given. | |
232 | */ | |
53d2f744 TI |
233 | int snd_timer_open(struct snd_timer_instance **ti, |
234 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
235 | unsigned int slave_id) |
236 | { | |
53d2f744 TI |
237 | struct snd_timer *timer; |
238 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 239 | |
1da177e4 LT |
240 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
241 | /* open a slave instance */ | |
242 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
243 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
244 | pr_debug("ALSA: timer: invalid slave class %i\n", |
245 | tid->dev_sclass); | |
1da177e4 LT |
246 | return -EINVAL; |
247 | } | |
1a60d4c5 | 248 | mutex_lock(®ister_mutex); |
1da177e4 | 249 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 250 | if (!timeri) { |
1a60d4c5 | 251 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
252 | return -ENOMEM; |
253 | } | |
1da177e4 LT |
254 | timeri->slave_class = tid->dev_sclass; |
255 | timeri->slave_id = tid->device; | |
256 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
257 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
258 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 259 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
260 | *ti = timeri; |
261 | return 0; | |
262 | } | |
263 | ||
264 | /* open a master instance */ | |
1a60d4c5 | 265 | mutex_lock(®ister_mutex); |
1da177e4 | 266 | timer = snd_timer_find(tid); |
ee2da997 JB |
267 | #ifdef CONFIG_MODULES |
268 | if (!timer) { | |
1a60d4c5 | 269 | mutex_unlock(®ister_mutex); |
1da177e4 | 270 | snd_timer_request(tid); |
1a60d4c5 | 271 | mutex_lock(®ister_mutex); |
1da177e4 LT |
272 | timer = snd_timer_find(tid); |
273 | } | |
274 | #endif | |
2fd43d11 | 275 | if (!timer) { |
1a60d4c5 | 276 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
277 | return -ENODEV; |
278 | } | |
2fd43d11 CL |
279 | if (!list_empty(&timer->open_list_head)) { |
280 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 281 | struct snd_timer_instance, open_list); |
2fd43d11 | 282 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 283 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
284 | return -EBUSY; |
285 | } | |
286 | } | |
287 | timeri = snd_timer_instance_new(owner, timer); | |
288 | if (!timeri) { | |
1a60d4c5 | 289 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
290 | return -ENOMEM; |
291 | } | |
230323da TI |
292 | /* take a card refcount for safe disconnection */ |
293 | if (timer->card) | |
294 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
295 | timeri->slave_class = tid->dev_sclass; |
296 | timeri->slave_id = slave_id; | |
297 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
298 | timer->hw.open(timer); | |
299 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
300 | snd_timer_check_master(timeri); | |
1a60d4c5 | 301 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
302 | *ti = timeri; |
303 | return 0; | |
304 | } | |
305 | ||
1da177e4 LT |
306 | /* |
307 | * close a timer instance | |
308 | */ | |
53d2f744 | 309 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 310 | { |
53d2f744 | 311 | struct snd_timer *timer = NULL; |
9244b2c3 | 312 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 313 | |
0072889a | 314 | if (snd_BUG_ON(!timeri)) |
7eaa943c | 315 | return -ENXIO; |
1da177e4 | 316 | |
9984d1b5 TI |
317 | mutex_lock(®ister_mutex); |
318 | list_del(&timeri->open_list); | |
319 | ||
1da177e4 LT |
320 | /* force to stop the timer */ |
321 | snd_timer_stop(timeri); | |
322 | ||
9984d1b5 TI |
323 | timer = timeri->timer; |
324 | if (timer) { | |
1da177e4 LT |
325 | /* wait, until the active callback is finished */ |
326 | spin_lock_irq(&timer->lock); | |
327 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
328 | spin_unlock_irq(&timer->lock); | |
329 | udelay(10); | |
330 | spin_lock_irq(&timer->lock); | |
331 | } | |
332 | spin_unlock_irq(&timer->lock); | |
9984d1b5 | 333 | |
1da177e4 | 334 | /* remove slave links */ |
b5a663aa TI |
335 | spin_lock_irq(&slave_active_lock); |
336 | spin_lock(&timer->lock); | |
9244b2c3 JB |
337 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
338 | open_list) { | |
9244b2c3 | 339 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
340 | slave->master = NULL; |
341 | slave->timer = NULL; | |
b5a663aa TI |
342 | list_del_init(&slave->ack_list); |
343 | list_del_init(&slave->active_list); | |
1da177e4 | 344 | } |
b5a663aa TI |
345 | spin_unlock(&timer->lock); |
346 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
347 | |
348 | /* slave doesn't need to release timer resources below */ | |
349 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
350 | timer = NULL; | |
1da177e4 | 351 | } |
9984d1b5 | 352 | |
1da177e4 LT |
353 | if (timeri->private_free) |
354 | timeri->private_free(timeri); | |
355 | kfree(timeri->owner); | |
356 | kfree(timeri); | |
9984d1b5 TI |
357 | |
358 | if (timer) { | |
359 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
360 | timer->hw.close(timer); | |
361 | /* release a card refcount for safe disconnection */ | |
362 | if (timer->card) | |
363 | put_device(&timer->card->card_dev); | |
de24214d | 364 | module_put(timer->module); |
9984d1b5 TI |
365 | } |
366 | ||
367 | mutex_unlock(®ister_mutex); | |
1da177e4 LT |
368 | return 0; |
369 | } | |
370 | ||
53d2f744 | 371 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 372 | { |
53d2f744 | 373 | struct snd_timer * timer; |
1da177e4 LT |
374 | |
375 | if (timeri == NULL) | |
376 | return 0; | |
377 | if ((timer = timeri->timer) != NULL) { | |
378 | if (timer->hw.c_resolution) | |
379 | return timer->hw.c_resolution(timer); | |
380 | return timer->hw.resolution; | |
381 | } | |
382 | return 0; | |
383 | } | |
384 | ||
53d2f744 | 385 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 386 | { |
53d2f744 | 387 | struct snd_timer *timer; |
1da177e4 | 388 | unsigned long resolution = 0; |
53d2f744 | 389 | struct snd_timer_instance *ts; |
1da177e4 LT |
390 | struct timespec tstamp; |
391 | ||
b751eef1 | 392 | if (timer_tstamp_monotonic) |
26204e04 | 393 | ktime_get_ts(&tstamp); |
b751eef1 JK |
394 | else |
395 | getnstimeofday(&tstamp); | |
7eaa943c TI |
396 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
397 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
398 | return; | |
6b172a85 CL |
399 | if (event == SNDRV_TIMER_EVENT_START || |
400 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
401 | resolution = snd_timer_resolution(ti); |
402 | if (ti->ccallback) | |
b30477d5 | 403 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
404 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
405 | return; | |
406 | timer = ti->timer; | |
407 | if (timer == NULL) | |
408 | return; | |
409 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
410 | return; | |
9244b2c3 | 411 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 412 | if (ts->ccallback) |
117159f0 | 413 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
414 | } |
415 | ||
f65e0d29 TI |
416 | /* start/continue a master timer */ |
417 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
418 | bool start, unsigned long ticks) | |
1da177e4 | 419 | { |
f65e0d29 TI |
420 | struct snd_timer *timer; |
421 | int result; | |
422 | unsigned long flags; | |
423 | ||
424 | timer = timeri->timer; | |
425 | if (!timer) | |
426 | return -EINVAL; | |
427 | ||
428 | spin_lock_irqsave(&timer->lock, flags); | |
429 | if (timer->card && timer->card->shutdown) { | |
430 | result = -ENODEV; | |
431 | goto unlock; | |
432 | } | |
433 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
434 | SNDRV_TIMER_IFLG_START)) { | |
435 | result = -EBUSY; | |
436 | goto unlock; | |
437 | } | |
438 | ||
439 | if (start) | |
440 | timeri->ticks = timeri->cticks = ticks; | |
441 | else if (!timeri->cticks) | |
442 | timeri->cticks = 1; | |
443 | timeri->pticks = 0; | |
444 | ||
5b7c757d | 445 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
446 | if (timer->running) { |
447 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
448 | goto __start_now; | |
449 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
450 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 451 | result = 1; /* delayed start */ |
1da177e4 | 452 | } else { |
f65e0d29 TI |
453 | if (start) |
454 | timer->sticks = ticks; | |
1da177e4 LT |
455 | timer->hw.start(timer); |
456 | __start_now: | |
457 | timer->running++; | |
458 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 459 | result = 0; |
1da177e4 | 460 | } |
f65e0d29 TI |
461 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
462 | SNDRV_TIMER_EVENT_CONTINUE); | |
463 | unlock: | |
464 | spin_unlock_irqrestore(&timer->lock, flags); | |
465 | return result; | |
1da177e4 LT |
466 | } |
467 | ||
f65e0d29 TI |
468 | /* start/continue a slave timer */ |
469 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
470 | bool start) | |
1da177e4 LT |
471 | { |
472 | unsigned long flags; | |
473 | ||
474 | spin_lock_irqsave(&slave_active_lock, flags); | |
f784beb7 TI |
475 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
476 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
477 | return -EBUSY; | |
478 | } | |
1da177e4 | 479 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
480 | if (timeri->master && timeri->timer) { |
481 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
482 | list_add_tail(&timeri->active_list, |
483 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
484 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
485 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
486 | spin_unlock(&timeri->timer->lock); |
487 | } | |
1da177e4 LT |
488 | spin_unlock_irqrestore(&slave_active_lock, flags); |
489 | return 1; /* delayed start */ | |
490 | } | |
491 | ||
f65e0d29 TI |
492 | /* stop/pause a master timer */ |
493 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 494 | { |
53d2f744 | 495 | struct snd_timer *timer; |
f65e0d29 | 496 | int result = 0; |
1da177e4 LT |
497 | unsigned long flags; |
498 | ||
1da177e4 LT |
499 | timer = timeri->timer; |
500 | if (!timer) | |
501 | return -EINVAL; | |
502 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
503 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
504 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
505 | result = -EBUSY; |
506 | goto unlock; | |
f784beb7 | 507 | } |
1da177e4 LT |
508 | list_del_init(&timeri->ack_list); |
509 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
510 | if (timer->card && timer->card->shutdown) |
511 | goto unlock; | |
512 | if (stop) { | |
513 | timeri->cticks = timeri->ticks; | |
514 | timeri->pticks = 0; | |
230323da | 515 | } |
1da177e4 LT |
516 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
517 | !(--timer->running)) { | |
518 | timer->hw.stop(timer); | |
519 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
520 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
521 | snd_timer_reschedule(timer, 0); | |
522 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
523 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
524 | timer->hw.start(timer); | |
525 | } | |
526 | } | |
527 | } | |
c3b16813 | 528 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
f65e0d29 TI |
529 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
530 | SNDRV_TIMER_EVENT_CONTINUE); | |
531 | unlock: | |
1da177e4 | 532 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
533 | return result; |
534 | } | |
535 | ||
536 | /* stop/pause a slave timer */ | |
537 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
538 | { | |
539 | unsigned long flags; | |
540 | ||
541 | spin_lock_irqsave(&slave_active_lock, flags); | |
542 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
543 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
544 | return -EBUSY; | |
545 | } | |
546 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
547 | if (timeri->timer) { | |
548 | spin_lock(&timeri->timer->lock); | |
549 | list_del_init(&timeri->ack_list); | |
550 | list_del_init(&timeri->active_list); | |
551 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
552 | SNDRV_TIMER_EVENT_CONTINUE); | |
553 | spin_unlock(&timeri->timer->lock); | |
554 | } | |
555 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
556 | return 0; |
557 | } | |
558 | ||
f65e0d29 TI |
559 | /* |
560 | * start the timer instance | |
561 | */ | |
562 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
563 | { | |
564 | if (timeri == NULL || ticks < 1) | |
565 | return -EINVAL; | |
566 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
567 | return snd_timer_start_slave(timeri, true); | |
568 | else | |
569 | return snd_timer_start1(timeri, true, ticks); | |
570 | } | |
571 | ||
1da177e4 LT |
572 | /* |
573 | * stop the timer instance. | |
574 | * | |
575 | * do not call this from the timer callback! | |
576 | */ | |
53d2f744 | 577 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 578 | { |
f65e0d29 TI |
579 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
580 | return snd_timer_stop_slave(timeri, true); | |
581 | else | |
582 | return snd_timer_stop1(timeri, true); | |
1da177e4 LT |
583 | } |
584 | ||
585 | /* | |
586 | * start again.. the tick is kept. | |
587 | */ | |
53d2f744 | 588 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 589 | { |
1da177e4 | 590 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
591 | return snd_timer_start_slave(timeri, false); |
592 | else | |
593 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 LT |
594 | } |
595 | ||
596 | /* | |
597 | * pause.. remember the ticks left | |
598 | */ | |
53d2f744 | 599 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 600 | { |
f65e0d29 TI |
601 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
602 | return snd_timer_stop_slave(timeri, false); | |
603 | else | |
604 | return snd_timer_stop1(timeri, false); | |
1da177e4 LT |
605 | } |
606 | ||
607 | /* | |
608 | * reschedule the timer | |
609 | * | |
610 | * start pending instances and check the scheduling ticks. | |
611 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
612 | */ | |
53d2f744 | 613 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 614 | { |
53d2f744 | 615 | struct snd_timer_instance *ti; |
1da177e4 | 616 | unsigned long ticks = ~0UL; |
1da177e4 | 617 | |
9244b2c3 | 618 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
619 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
620 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
621 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
622 | timer->running++; | |
623 | } | |
624 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
625 | if (ticks > ti->cticks) | |
626 | ticks = ti->cticks; | |
627 | } | |
628 | } | |
629 | if (ticks == ~0UL) { | |
630 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
631 | return; | |
632 | } | |
633 | if (ticks > timer->hw.ticks) | |
634 | ticks = timer->hw.ticks; | |
635 | if (ticks_left != ticks) | |
636 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
637 | timer->sticks = ticks; | |
638 | } | |
639 | ||
640 | /* | |
641 | * timer tasklet | |
642 | * | |
643 | */ | |
644 | static void snd_timer_tasklet(unsigned long arg) | |
645 | { | |
53d2f744 TI |
646 | struct snd_timer *timer = (struct snd_timer *) arg; |
647 | struct snd_timer_instance *ti; | |
1da177e4 LT |
648 | struct list_head *p; |
649 | unsigned long resolution, ticks; | |
2999ff5b | 650 | unsigned long flags; |
1da177e4 | 651 | |
230323da TI |
652 | if (timer->card && timer->card->shutdown) |
653 | return; | |
654 | ||
2999ff5b | 655 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
656 | /* now process all callbacks */ |
657 | while (!list_empty(&timer->sack_list_head)) { | |
658 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 659 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
660 | |
661 | /* remove from ack_list and make empty */ | |
662 | list_del_init(p); | |
6b172a85 | 663 | |
1da177e4 LT |
664 | ticks = ti->pticks; |
665 | ti->pticks = 0; | |
666 | resolution = ti->resolution; | |
667 | ||
668 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
669 | spin_unlock(&timer->lock); | |
670 | if (ti->callback) | |
671 | ti->callback(ti, resolution, ticks); | |
672 | spin_lock(&timer->lock); | |
673 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
674 | } | |
2999ff5b | 675 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
676 | } |
677 | ||
678 | /* | |
679 | * timer interrupt | |
680 | * | |
681 | * ticks_left is usually equal to timer->sticks. | |
682 | * | |
683 | */ | |
53d2f744 | 684 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 685 | { |
9244b2c3 | 686 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 687 | unsigned long resolution, ticks; |
9244b2c3 | 688 | struct list_head *p, *ack_list_head; |
b32425ac | 689 | unsigned long flags; |
1da177e4 LT |
690 | int use_tasklet = 0; |
691 | ||
692 | if (timer == NULL) | |
693 | return; | |
694 | ||
230323da TI |
695 | if (timer->card && timer->card->shutdown) |
696 | return; | |
697 | ||
b32425ac | 698 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
699 | |
700 | /* remember the current resolution */ | |
701 | if (timer->hw.c_resolution) | |
702 | resolution = timer->hw.c_resolution(timer); | |
703 | else | |
704 | resolution = timer->hw.resolution; | |
705 | ||
706 | /* loop for all active instances | |
9244b2c3 | 707 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
708 | * processed instance is relinked to done_list_head before the callback |
709 | * is called. | |
1da177e4 | 710 | */ |
9244b2c3 JB |
711 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
712 | active_list) { | |
1da177e4 LT |
713 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
714 | continue; | |
715 | ti->pticks += ticks_left; | |
716 | ti->resolution = resolution; | |
717 | if (ti->cticks < ticks_left) | |
718 | ti->cticks = 0; | |
719 | else | |
720 | ti->cticks -= ticks_left; | |
721 | if (ti->cticks) /* not expired */ | |
722 | continue; | |
723 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
724 | ti->cticks = ti->ticks; | |
725 | } else { | |
726 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
727 | --timer->running; |
728 | list_del_init(&ti->active_list); | |
1da177e4 | 729 | } |
6b172a85 CL |
730 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
731 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
732 | ack_list_head = &timer->ack_list_head; | |
733 | else | |
734 | ack_list_head = &timer->sack_list_head; | |
735 | if (list_empty(&ti->ack_list)) | |
736 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 737 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
738 | ts->pticks = ti->pticks; |
739 | ts->resolution = resolution; | |
6b172a85 CL |
740 | if (list_empty(&ts->ack_list)) |
741 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
742 | } |
743 | } | |
744 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 745 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
746 | if (timer->running) { |
747 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
748 | timer->hw.stop(timer); | |
749 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
750 | } | |
751 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
752 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
753 | /* restart timer */ | |
754 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
755 | timer->hw.start(timer); | |
756 | } | |
757 | } else { | |
758 | timer->hw.stop(timer); | |
759 | } | |
760 | ||
761 | /* now process all fast callbacks */ | |
762 | while (!list_empty(&timer->ack_list_head)) { | |
763 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 764 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 765 | |
1da177e4 LT |
766 | /* remove from ack_list and make empty */ |
767 | list_del_init(p); | |
6b172a85 | 768 | |
1da177e4 LT |
769 | ticks = ti->pticks; |
770 | ti->pticks = 0; | |
771 | ||
772 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
773 | spin_unlock(&timer->lock); | |
774 | if (ti->callback) | |
775 | ti->callback(ti, resolution, ticks); | |
776 | spin_lock(&timer->lock); | |
777 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
778 | } | |
779 | ||
780 | /* do we have any slow callbacks? */ | |
781 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 782 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
783 | |
784 | if (use_tasklet) | |
1f04128a | 785 | tasklet_schedule(&timer->task_queue); |
1da177e4 LT |
786 | } |
787 | ||
788 | /* | |
789 | ||
790 | */ | |
791 | ||
53d2f744 TI |
792 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
793 | struct snd_timer **rtimer) | |
1da177e4 | 794 | { |
53d2f744 | 795 | struct snd_timer *timer; |
1da177e4 | 796 | int err; |
53d2f744 | 797 | static struct snd_device_ops ops = { |
1da177e4 LT |
798 | .dev_free = snd_timer_dev_free, |
799 | .dev_register = snd_timer_dev_register, | |
c461482c | 800 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
801 | }; |
802 | ||
7eaa943c TI |
803 | if (snd_BUG_ON(!tid)) |
804 | return -EINVAL; | |
805 | if (rtimer) | |
806 | *rtimer = NULL; | |
ca2c0966 | 807 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 808 | if (!timer) |
1da177e4 LT |
809 | return -ENOMEM; |
810 | timer->tmr_class = tid->dev_class; | |
811 | timer->card = card; | |
812 | timer->tmr_device = tid->device; | |
813 | timer->tmr_subdevice = tid->subdevice; | |
814 | if (id) | |
815 | strlcpy(timer->id, id, sizeof(timer->id)); | |
816 | INIT_LIST_HEAD(&timer->device_list); | |
817 | INIT_LIST_HEAD(&timer->open_list_head); | |
818 | INIT_LIST_HEAD(&timer->active_list_head); | |
819 | INIT_LIST_HEAD(&timer->ack_list_head); | |
820 | INIT_LIST_HEAD(&timer->sack_list_head); | |
821 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
822 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
823 | (unsigned long)timer); | |
1da177e4 | 824 | if (card != NULL) { |
de24214d | 825 | timer->module = card->module; |
6b172a85 CL |
826 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
827 | if (err < 0) { | |
1da177e4 LT |
828 | snd_timer_free(timer); |
829 | return err; | |
830 | } | |
831 | } | |
7eaa943c TI |
832 | if (rtimer) |
833 | *rtimer = timer; | |
1da177e4 LT |
834 | return 0; |
835 | } | |
836 | ||
53d2f744 | 837 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 838 | { |
7eaa943c TI |
839 | if (!timer) |
840 | return 0; | |
c461482c TI |
841 | |
842 | mutex_lock(®ister_mutex); | |
843 | if (! list_empty(&timer->open_list_head)) { | |
844 | struct list_head *p, *n; | |
845 | struct snd_timer_instance *ti; | |
cf74dcf3 | 846 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
847 | list_for_each_safe(p, n, &timer->open_list_head) { |
848 | list_del_init(p); | |
849 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
850 | ti->timer = NULL; | |
851 | } | |
852 | } | |
853 | list_del(&timer->device_list); | |
854 | mutex_unlock(®ister_mutex); | |
855 | ||
1da177e4 LT |
856 | if (timer->private_free) |
857 | timer->private_free(timer); | |
858 | kfree(timer); | |
859 | return 0; | |
860 | } | |
861 | ||
53d2f744 | 862 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 863 | { |
53d2f744 | 864 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
865 | return snd_timer_free(timer); |
866 | } | |
867 | ||
53d2f744 | 868 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 869 | { |
53d2f744 TI |
870 | struct snd_timer *timer = dev->device_data; |
871 | struct snd_timer *timer1; | |
1da177e4 | 872 | |
7eaa943c TI |
873 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
874 | return -ENXIO; | |
1da177e4 LT |
875 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
876 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
877 | return -EINVAL; | |
878 | ||
1a60d4c5 | 879 | mutex_lock(®ister_mutex); |
9244b2c3 | 880 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
881 | if (timer1->tmr_class > timer->tmr_class) |
882 | break; | |
883 | if (timer1->tmr_class < timer->tmr_class) | |
884 | continue; | |
885 | if (timer1->card && timer->card) { | |
886 | if (timer1->card->number > timer->card->number) | |
887 | break; | |
888 | if (timer1->card->number < timer->card->number) | |
889 | continue; | |
890 | } | |
891 | if (timer1->tmr_device > timer->tmr_device) | |
892 | break; | |
893 | if (timer1->tmr_device < timer->tmr_device) | |
894 | continue; | |
895 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
896 | break; | |
897 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
898 | continue; | |
899 | /* conflicts.. */ | |
1a60d4c5 | 900 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
901 | return -EBUSY; |
902 | } | |
9244b2c3 | 903 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 904 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
905 | return 0; |
906 | } | |
907 | ||
c461482c | 908 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 909 | { |
c461482c | 910 | struct snd_timer *timer = device->device_data; |
230323da TI |
911 | struct snd_timer_instance *ti; |
912 | ||
1a60d4c5 | 913 | mutex_lock(®ister_mutex); |
c461482c | 914 | list_del_init(&timer->device_list); |
230323da TI |
915 | /* wake up pending sleepers */ |
916 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
917 | if (ti->disconnect) |
918 | ti->disconnect(ti); | |
230323da | 919 | } |
1a60d4c5 | 920 | mutex_unlock(®ister_mutex); |
c461482c | 921 | return 0; |
1da177e4 LT |
922 | } |
923 | ||
53d2f744 | 924 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
925 | { |
926 | unsigned long flags; | |
927 | unsigned long resolution = 0; | |
53d2f744 | 928 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 929 | |
230323da TI |
930 | if (timer->card && timer->card->shutdown) |
931 | return; | |
7c22f1aa TI |
932 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
933 | return; | |
7eaa943c TI |
934 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
935 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
936 | return; | |
1da177e4 | 937 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
938 | if (event == SNDRV_TIMER_EVENT_MSTART || |
939 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
940 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
941 | if (timer->hw.c_resolution) |
942 | resolution = timer->hw.c_resolution(timer); | |
943 | else | |
944 | resolution = timer->hw.resolution; | |
945 | } | |
9244b2c3 | 946 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
947 | if (ti->ccallback) |
948 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 949 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
950 | if (ts->ccallback) |
951 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
952 | } |
953 | spin_unlock_irqrestore(&timer->lock, flags); | |
954 | } | |
955 | ||
956 | /* | |
957 | * exported functions for global timers | |
958 | */ | |
53d2f744 | 959 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 960 | { |
53d2f744 | 961 | struct snd_timer_id tid; |
6b172a85 | 962 | |
1da177e4 LT |
963 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
964 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
965 | tid.card = -1; | |
966 | tid.device = device; | |
967 | tid.subdevice = 0; | |
968 | return snd_timer_new(NULL, id, &tid, rtimer); | |
969 | } | |
970 | ||
53d2f744 | 971 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
972 | { |
973 | return snd_timer_free(timer); | |
974 | } | |
975 | ||
53d2f744 | 976 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 977 | { |
53d2f744 | 978 | struct snd_device dev; |
1da177e4 LT |
979 | |
980 | memset(&dev, 0, sizeof(dev)); | |
981 | dev.device_data = timer; | |
982 | return snd_timer_dev_register(&dev); | |
983 | } | |
984 | ||
6b172a85 | 985 | /* |
1da177e4 LT |
986 | * System timer |
987 | */ | |
988 | ||
989 | struct snd_timer_system_private { | |
990 | struct timer_list tlist; | |
1da177e4 LT |
991 | unsigned long last_expires; |
992 | unsigned long last_jiffies; | |
993 | unsigned long correction; | |
994 | }; | |
995 | ||
1da177e4 LT |
996 | static void snd_timer_s_function(unsigned long data) |
997 | { | |
53d2f744 | 998 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
999 | struct snd_timer_system_private *priv = timer->private_data; |
1000 | unsigned long jiff = jiffies; | |
1001 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1002 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1003 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1004 | } | |
1005 | ||
53d2f744 | 1006 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1007 | { |
1008 | struct snd_timer_system_private *priv; | |
1009 | unsigned long njiff; | |
1010 | ||
1011 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1012 | njiff = (priv->last_jiffies = jiffies); | |
1013 | if (priv->correction > timer->sticks - 1) { | |
1014 | priv->correction -= timer->sticks - 1; | |
1015 | njiff++; | |
1016 | } else { | |
1017 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1018 | priv->correction = 0; |
1da177e4 | 1019 | } |
4a07083e TI |
1020 | priv->last_expires = njiff; |
1021 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1022 | return 0; |
1023 | } | |
1024 | ||
53d2f744 | 1025 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1026 | { |
1027 | struct snd_timer_system_private *priv; | |
1028 | unsigned long jiff; | |
1029 | ||
1030 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1031 | del_timer(&priv->tlist); | |
1032 | jiff = jiffies; | |
1033 | if (time_before(jiff, priv->last_expires)) | |
1034 | timer->sticks = priv->last_expires - jiff; | |
1035 | else | |
1036 | timer->sticks = 1; | |
de2696d8 | 1037 | priv->correction = 0; |
1da177e4 LT |
1038 | return 0; |
1039 | } | |
1040 | ||
f146357f TI |
1041 | static int snd_timer_s_close(struct snd_timer *timer) |
1042 | { | |
1043 | struct snd_timer_system_private *priv; | |
1044 | ||
1045 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1046 | del_timer_sync(&priv->tlist); | |
1047 | return 0; | |
1048 | } | |
1049 | ||
53d2f744 | 1050 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1051 | { |
1052 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1053 | .resolution = 1000000000L / HZ, | |
1054 | .ticks = 10000000L, | |
f146357f | 1055 | .close = snd_timer_s_close, |
1da177e4 LT |
1056 | .start = snd_timer_s_start, |
1057 | .stop = snd_timer_s_stop | |
1058 | }; | |
1059 | ||
53d2f744 | 1060 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1061 | { |
1062 | kfree(timer->private_data); | |
1063 | } | |
1064 | ||
1065 | static int snd_timer_register_system(void) | |
1066 | { | |
53d2f744 | 1067 | struct snd_timer *timer; |
1da177e4 LT |
1068 | struct snd_timer_system_private *priv; |
1069 | int err; | |
1070 | ||
6b172a85 CL |
1071 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1072 | if (err < 0) | |
1da177e4 LT |
1073 | return err; |
1074 | strcpy(timer->name, "system timer"); | |
1075 | timer->hw = snd_timer_system; | |
ca2c0966 | 1076 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1077 | if (priv == NULL) { |
1078 | snd_timer_free(timer); | |
1079 | return -ENOMEM; | |
1080 | } | |
f169c105 | 1081 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
1da177e4 LT |
1082 | timer->private_data = priv; |
1083 | timer->private_free = snd_timer_free_system; | |
1084 | return snd_timer_global_register(timer); | |
1085 | } | |
1086 | ||
cd6a6503 | 1087 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1088 | /* |
1089 | * Info interface | |
1090 | */ | |
1091 | ||
53d2f744 TI |
1092 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1093 | struct snd_info_buffer *buffer) | |
1da177e4 | 1094 | { |
53d2f744 TI |
1095 | struct snd_timer *timer; |
1096 | struct snd_timer_instance *ti; | |
1da177e4 | 1097 | |
1a60d4c5 | 1098 | mutex_lock(®ister_mutex); |
9244b2c3 | 1099 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1100 | if (timer->card && timer->card->shutdown) |
1101 | continue; | |
1da177e4 LT |
1102 | switch (timer->tmr_class) { |
1103 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1104 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1105 | break; | |
1106 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1107 | snd_iprintf(buffer, "C%i-%i: ", |
1108 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1109 | break; |
1110 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1111 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1112 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1113 | break; |
1114 | default: | |
6b172a85 CL |
1115 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1116 | timer->card ? timer->card->number : -1, | |
1117 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1118 | } |
1119 | snd_iprintf(buffer, "%s :", timer->name); | |
1120 | if (timer->hw.resolution) | |
6b172a85 CL |
1121 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1122 | timer->hw.resolution / 1000, | |
1123 | timer->hw.resolution % 1000, | |
1124 | timer->hw.ticks); | |
1da177e4 LT |
1125 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1126 | snd_iprintf(buffer, " SLAVE"); | |
1127 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1128 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1129 | snd_iprintf(buffer, " Client %s : %s\n", |
1130 | ti->owner ? ti->owner : "unknown", | |
1131 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1132 | SNDRV_TIMER_IFLG_RUNNING) | |
1133 | ? "running" : "stopped"); | |
1da177e4 | 1134 | } |
1a60d4c5 | 1135 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1136 | } |
1137 | ||
6581f4e7 | 1138 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1139 | |
1140 | static void __init snd_timer_proc_init(void) | |
1141 | { | |
1142 | struct snd_info_entry *entry; | |
1143 | ||
1144 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1145 | if (entry != NULL) { | |
e28563cc TI |
1146 | entry->c.text.read = snd_timer_proc_read; |
1147 | if (snd_info_register(entry) < 0) { | |
1148 | snd_info_free_entry(entry); | |
1149 | entry = NULL; | |
1150 | } | |
1151 | } | |
1152 | snd_timer_proc_entry = entry; | |
1153 | } | |
1154 | ||
1155 | static void __exit snd_timer_proc_done(void) | |
1156 | { | |
746d4a02 | 1157 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1158 | } |
cd6a6503 | 1159 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1160 | #define snd_timer_proc_init() |
1161 | #define snd_timer_proc_done() | |
1162 | #endif | |
1163 | ||
1da177e4 LT |
1164 | /* |
1165 | * USER SPACE interface | |
1166 | */ | |
1167 | ||
53d2f744 | 1168 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1169 | unsigned long resolution, |
1170 | unsigned long ticks) | |
1171 | { | |
53d2f744 TI |
1172 | struct snd_timer_user *tu = timeri->callback_data; |
1173 | struct snd_timer_read *r; | |
1da177e4 | 1174 | int prev; |
6b172a85 | 1175 | |
1da177e4 LT |
1176 | spin_lock(&tu->qlock); |
1177 | if (tu->qused > 0) { | |
1178 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1179 | r = &tu->queue[prev]; | |
1180 | if (r->resolution == resolution) { | |
1181 | r->ticks += ticks; | |
1182 | goto __wake; | |
1183 | } | |
1184 | } | |
1185 | if (tu->qused >= tu->queue_size) { | |
1186 | tu->overrun++; | |
1187 | } else { | |
1188 | r = &tu->queue[tu->qtail++]; | |
1189 | tu->qtail %= tu->queue_size; | |
1190 | r->resolution = resolution; | |
1191 | r->ticks = ticks; | |
1192 | tu->qused++; | |
1193 | } | |
1194 | __wake: | |
1195 | spin_unlock(&tu->qlock); | |
1196 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1197 | wake_up(&tu->qchange_sleep); | |
1198 | } | |
1199 | ||
53d2f744 TI |
1200 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1201 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1202 | { |
1203 | if (tu->qused >= tu->queue_size) { | |
1204 | tu->overrun++; | |
1205 | } else { | |
1206 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1207 | tu->qtail %= tu->queue_size; | |
1208 | tu->qused++; | |
1209 | } | |
1210 | } | |
1211 | ||
53d2f744 TI |
1212 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1213 | int event, | |
1da177e4 LT |
1214 | struct timespec *tstamp, |
1215 | unsigned long resolution) | |
1216 | { | |
53d2f744 TI |
1217 | struct snd_timer_user *tu = timeri->callback_data; |
1218 | struct snd_timer_tread r1; | |
bfe70783 | 1219 | unsigned long flags; |
1da177e4 | 1220 | |
6b172a85 CL |
1221 | if (event >= SNDRV_TIMER_EVENT_START && |
1222 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1223 | tu->tstamp = *tstamp; |
1224 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1225 | return; | |
9a47e9cf | 1226 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1227 | r1.event = event; |
1228 | r1.tstamp = *tstamp; | |
1229 | r1.val = resolution; | |
bfe70783 | 1230 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1231 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1232 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1233 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1234 | wake_up(&tu->qchange_sleep); | |
1235 | } | |
1236 | ||
40ed9444 TI |
1237 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1238 | { | |
1239 | struct snd_timer_user *tu = timeri->callback_data; | |
1240 | ||
1241 | tu->disconnected = true; | |
1242 | wake_up(&tu->qchange_sleep); | |
1243 | } | |
1244 | ||
53d2f744 | 1245 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1246 | unsigned long resolution, |
1247 | unsigned long ticks) | |
1248 | { | |
53d2f744 TI |
1249 | struct snd_timer_user *tu = timeri->callback_data; |
1250 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1251 | struct timespec tstamp; |
1252 | int prev, append = 0; | |
1253 | ||
07799e75 | 1254 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1255 | spin_lock(&tu->qlock); |
6b172a85 CL |
1256 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1257 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1258 | spin_unlock(&tu->qlock); |
1259 | return; | |
1260 | } | |
b751eef1 JK |
1261 | if (tu->last_resolution != resolution || ticks > 0) { |
1262 | if (timer_tstamp_monotonic) | |
26204e04 | 1263 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1264 | else |
1265 | getnstimeofday(&tstamp); | |
1266 | } | |
6b172a85 CL |
1267 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1268 | tu->last_resolution != resolution) { | |
e4ec8cc8 | 1269 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1270 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1271 | r1.tstamp = tstamp; | |
1272 | r1.val = resolution; | |
1273 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1274 | tu->last_resolution = resolution; | |
1275 | append++; | |
1276 | } | |
1277 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1278 | goto __wake; | |
1279 | if (ticks == 0) | |
1280 | goto __wake; | |
1281 | if (tu->qused > 0) { | |
1282 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1283 | r = &tu->tqueue[prev]; | |
1284 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1285 | r->tstamp = tstamp; | |
1286 | r->val += ticks; | |
1287 | append++; | |
1288 | goto __wake; | |
1289 | } | |
1290 | } | |
1291 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1292 | r1.tstamp = tstamp; | |
1293 | r1.val = ticks; | |
1294 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1295 | append++; | |
1296 | __wake: | |
1297 | spin_unlock(&tu->qlock); | |
1298 | if (append == 0) | |
1299 | return; | |
1300 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1301 | wake_up(&tu->qchange_sleep); | |
1302 | } | |
1303 | ||
1304 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1305 | { | |
53d2f744 | 1306 | struct snd_timer_user *tu; |
02f4865f TI |
1307 | int err; |
1308 | ||
1309 | err = nonseekable_open(inode, file); | |
1310 | if (err < 0) | |
1311 | return err; | |
6b172a85 | 1312 | |
ca2c0966 | 1313 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1314 | if (tu == NULL) |
1315 | return -ENOMEM; | |
1316 | spin_lock_init(&tu->qlock); | |
1317 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1318 | mutex_init(&tu->ioctl_lock); |
1da177e4 LT |
1319 | tu->ticks = 1; |
1320 | tu->queue_size = 128; | |
53d2f744 | 1321 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1322 | GFP_KERNEL); |
1da177e4 LT |
1323 | if (tu->queue == NULL) { |
1324 | kfree(tu); | |
1325 | return -ENOMEM; | |
1326 | } | |
1327 | file->private_data = tu; | |
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1332 | { | |
53d2f744 | 1333 | struct snd_timer_user *tu; |
1da177e4 LT |
1334 | |
1335 | if (file->private_data) { | |
1336 | tu = file->private_data; | |
1337 | file->private_data = NULL; | |
af368027 | 1338 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1339 | if (tu->timeri) |
1340 | snd_timer_close(tu->timeri); | |
af368027 | 1341 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1342 | kfree(tu->queue); |
1343 | kfree(tu->tqueue); | |
1344 | kfree(tu); | |
1345 | } | |
1346 | return 0; | |
1347 | } | |
1348 | ||
53d2f744 | 1349 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1350 | { |
1351 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1352 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1353 | id->card = -1; | |
1354 | id->device = -1; | |
1355 | id->subdevice = -1; | |
1356 | } | |
1357 | ||
53d2f744 | 1358 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1359 | { |
1360 | id->dev_class = timer->tmr_class; | |
1361 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1362 | id->card = timer->card ? timer->card->number : -1; | |
1363 | id->device = timer->tmr_device; | |
1364 | id->subdevice = timer->tmr_subdevice; | |
1365 | } | |
1366 | ||
53d2f744 | 1367 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1368 | { |
53d2f744 TI |
1369 | struct snd_timer_id id; |
1370 | struct snd_timer *timer; | |
1da177e4 | 1371 | struct list_head *p; |
6b172a85 | 1372 | |
1da177e4 LT |
1373 | if (copy_from_user(&id, _tid, sizeof(id))) |
1374 | return -EFAULT; | |
1a60d4c5 | 1375 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1376 | if (id.dev_class < 0) { /* first item */ |
1377 | if (list_empty(&snd_timer_list)) | |
1378 | snd_timer_user_zero_id(&id); | |
1379 | else { | |
9dfba380 | 1380 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1381 | struct snd_timer, device_list); |
1da177e4 LT |
1382 | snd_timer_user_copy_id(&id, timer); |
1383 | } | |
1384 | } else { | |
1385 | switch (id.dev_class) { | |
1386 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1387 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1388 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1389 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1390 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1391 | snd_timer_user_copy_id(&id, timer); | |
1392 | break; | |
1393 | } | |
1394 | if (timer->tmr_device >= id.device) { | |
1395 | snd_timer_user_copy_id(&id, timer); | |
1396 | break; | |
1397 | } | |
1398 | } | |
1399 | if (p == &snd_timer_list) | |
1400 | snd_timer_user_zero_id(&id); | |
1401 | break; | |
1402 | case SNDRV_TIMER_CLASS_CARD: | |
1403 | case SNDRV_TIMER_CLASS_PCM: | |
1404 | if (id.card < 0) { | |
1405 | id.card = 0; | |
1406 | } else { | |
1407 | if (id.card < 0) { | |
1408 | id.card = 0; | |
1409 | } else { | |
1410 | if (id.device < 0) { | |
1411 | id.device = 0; | |
1412 | } else { | |
6b172a85 CL |
1413 | if (id.subdevice < 0) { |
1414 | id.subdevice = 0; | |
1415 | } else { | |
1416 | id.subdevice++; | |
1417 | } | |
1da177e4 LT |
1418 | } |
1419 | } | |
1420 | } | |
1421 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1422 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1423 | if (timer->tmr_class > id.dev_class) { |
1424 | snd_timer_user_copy_id(&id, timer); | |
1425 | break; | |
1426 | } | |
1427 | if (timer->tmr_class < id.dev_class) | |
1428 | continue; | |
1429 | if (timer->card->number > id.card) { | |
1430 | snd_timer_user_copy_id(&id, timer); | |
1431 | break; | |
1432 | } | |
1433 | if (timer->card->number < id.card) | |
1434 | continue; | |
1435 | if (timer->tmr_device > id.device) { | |
1436 | snd_timer_user_copy_id(&id, timer); | |
1437 | break; | |
1438 | } | |
1439 | if (timer->tmr_device < id.device) | |
1440 | continue; | |
1441 | if (timer->tmr_subdevice > id.subdevice) { | |
1442 | snd_timer_user_copy_id(&id, timer); | |
1443 | break; | |
1444 | } | |
1445 | if (timer->tmr_subdevice < id.subdevice) | |
1446 | continue; | |
1447 | snd_timer_user_copy_id(&id, timer); | |
1448 | break; | |
1449 | } | |
1450 | if (p == &snd_timer_list) | |
1451 | snd_timer_user_zero_id(&id); | |
1452 | break; | |
1453 | default: | |
1454 | snd_timer_user_zero_id(&id); | |
1455 | } | |
1456 | } | |
1a60d4c5 | 1457 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1458 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1459 | return -EFAULT; | |
1460 | return 0; | |
6b172a85 | 1461 | } |
1da177e4 | 1462 | |
6b172a85 | 1463 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1464 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1465 | { |
53d2f744 TI |
1466 | struct snd_timer_ginfo *ginfo; |
1467 | struct snd_timer_id tid; | |
1468 | struct snd_timer *t; | |
1da177e4 LT |
1469 | struct list_head *p; |
1470 | int err = 0; | |
1471 | ||
ef44a1ec LZ |
1472 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1473 | if (IS_ERR(ginfo)) | |
1474 | return PTR_ERR(ginfo); | |
1475 | ||
1da177e4 LT |
1476 | tid = ginfo->tid; |
1477 | memset(ginfo, 0, sizeof(*ginfo)); | |
1478 | ginfo->tid = tid; | |
1a60d4c5 | 1479 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1480 | t = snd_timer_find(&tid); |
1481 | if (t != NULL) { | |
1482 | ginfo->card = t->card ? t->card->number : -1; | |
1483 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1484 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1485 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1486 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1487 | ginfo->resolution = t->hw.resolution; | |
1488 | if (t->hw.resolution_min > 0) { | |
1489 | ginfo->resolution_min = t->hw.resolution_min; | |
1490 | ginfo->resolution_max = t->hw.resolution_max; | |
1491 | } | |
1492 | list_for_each(p, &t->open_list_head) { | |
1493 | ginfo->clients++; | |
1494 | } | |
1495 | } else { | |
1496 | err = -ENODEV; | |
1497 | } | |
1a60d4c5 | 1498 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1499 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1500 | err = -EFAULT; | |
1501 | kfree(ginfo); | |
1502 | return err; | |
1503 | } | |
1504 | ||
91d2178e | 1505 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1506 | { |
53d2f744 | 1507 | struct snd_timer *t; |
1da177e4 LT |
1508 | int err; |
1509 | ||
1a60d4c5 | 1510 | mutex_lock(®ister_mutex); |
91d2178e | 1511 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1512 | if (!t) { |
1da177e4 | 1513 | err = -ENODEV; |
6b172a85 CL |
1514 | goto _error; |
1515 | } | |
1516 | if (!list_empty(&t->open_list_head)) { | |
1517 | err = -EBUSY; | |
1518 | goto _error; | |
1519 | } | |
1520 | if (!t->hw.set_period) { | |
1521 | err = -ENOSYS; | |
1522 | goto _error; | |
1da177e4 | 1523 | } |
91d2178e | 1524 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1525 | _error: |
1a60d4c5 | 1526 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1527 | return err; |
1528 | } | |
1529 | ||
91d2178e TS |
1530 | static int snd_timer_user_gparams(struct file *file, |
1531 | struct snd_timer_gparams __user *_gparams) | |
1532 | { | |
1533 | struct snd_timer_gparams gparams; | |
1534 | ||
1535 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1536 | return -EFAULT; | |
1537 | return timer_set_gparams(&gparams); | |
1538 | } | |
1539 | ||
6b172a85 | 1540 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1541 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1542 | { |
53d2f744 TI |
1543 | struct snd_timer_gstatus gstatus; |
1544 | struct snd_timer_id tid; | |
1545 | struct snd_timer *t; | |
1da177e4 LT |
1546 | int err = 0; |
1547 | ||
1548 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1549 | return -EFAULT; | |
1550 | tid = gstatus.tid; | |
1551 | memset(&gstatus, 0, sizeof(gstatus)); | |
1552 | gstatus.tid = tid; | |
1a60d4c5 | 1553 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1554 | t = snd_timer_find(&tid); |
1555 | if (t != NULL) { | |
1556 | if (t->hw.c_resolution) | |
1557 | gstatus.resolution = t->hw.c_resolution(t); | |
1558 | else | |
1559 | gstatus.resolution = t->hw.resolution; | |
1560 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1561 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1562 | &gstatus.resolution_den); | |
1da177e4 LT |
1563 | } else { |
1564 | gstatus.resolution_num = gstatus.resolution; | |
1565 | gstatus.resolution_den = 1000000000uL; | |
1566 | } | |
1567 | } else { | |
1568 | err = -ENODEV; | |
1569 | } | |
1a60d4c5 | 1570 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1571 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1572 | err = -EFAULT; | |
1573 | return err; | |
1574 | } | |
1575 | ||
6b172a85 | 1576 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1577 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1578 | { |
53d2f744 TI |
1579 | struct snd_timer_user *tu; |
1580 | struct snd_timer_select tselect; | |
1da177e4 | 1581 | char str[32]; |
c1935b4d | 1582 | int err = 0; |
6b172a85 | 1583 | |
1da177e4 | 1584 | tu = file->private_data; |
c1935b4d | 1585 | if (tu->timeri) { |
1da177e4 | 1586 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1587 | tu->timeri = NULL; |
1588 | } | |
1589 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1590 | err = -EFAULT; | |
1591 | goto __err; | |
1592 | } | |
1da177e4 LT |
1593 | sprintf(str, "application %i", current->pid); |
1594 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1595 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1596 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1597 | if (err < 0) | |
c1935b4d | 1598 | goto __err; |
1da177e4 | 1599 | |
4d572776 JJ |
1600 | kfree(tu->queue); |
1601 | tu->queue = NULL; | |
1602 | kfree(tu->tqueue); | |
1603 | tu->tqueue = NULL; | |
1da177e4 | 1604 | if (tu->tread) { |
53d2f744 | 1605 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1606 | GFP_KERNEL); |
c1935b4d JK |
1607 | if (tu->tqueue == NULL) |
1608 | err = -ENOMEM; | |
1da177e4 | 1609 | } else { |
53d2f744 | 1610 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1611 | GFP_KERNEL); |
c1935b4d JK |
1612 | if (tu->queue == NULL) |
1613 | err = -ENOMEM; | |
1da177e4 | 1614 | } |
6b172a85 | 1615 | |
c1935b4d JK |
1616 | if (err < 0) { |
1617 | snd_timer_close(tu->timeri); | |
1618 | tu->timeri = NULL; | |
1619 | } else { | |
1620 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1621 | tu->timeri->callback = tu->tread |
1622 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1623 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1624 | tu->timeri->callback_data = (void *)tu; | |
40ed9444 | 1625 | tu->timeri->disconnect = snd_timer_user_disconnect; |
c1935b4d JK |
1626 | } |
1627 | ||
1628 | __err: | |
c1935b4d | 1629 | return err; |
1da177e4 LT |
1630 | } |
1631 | ||
6b172a85 | 1632 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1633 | struct snd_timer_info __user *_info) |
1da177e4 | 1634 | { |
53d2f744 TI |
1635 | struct snd_timer_user *tu; |
1636 | struct snd_timer_info *info; | |
1637 | struct snd_timer *t; | |
1da177e4 LT |
1638 | int err = 0; |
1639 | ||
1640 | tu = file->private_data; | |
7c64ec34 CL |
1641 | if (!tu->timeri) |
1642 | return -EBADFD; | |
1da177e4 | 1643 | t = tu->timeri->timer; |
7c64ec34 CL |
1644 | if (!t) |
1645 | return -EBADFD; | |
1da177e4 | 1646 | |
ca2c0966 | 1647 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1648 | if (! info) |
1649 | return -ENOMEM; | |
1650 | info->card = t->card ? t->card->number : -1; | |
1651 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1652 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1653 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1654 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1655 | info->resolution = t->hw.resolution; | |
1656 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1657 | err = -EFAULT; | |
1658 | kfree(info); | |
1659 | return err; | |
1660 | } | |
1661 | ||
6b172a85 | 1662 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1663 | struct snd_timer_params __user *_params) |
1da177e4 | 1664 | { |
53d2f744 TI |
1665 | struct snd_timer_user *tu; |
1666 | struct snd_timer_params params; | |
1667 | struct snd_timer *t; | |
1668 | struct snd_timer_read *tr; | |
1669 | struct snd_timer_tread *ttr; | |
1da177e4 | 1670 | int err; |
6b172a85 | 1671 | |
1da177e4 | 1672 | tu = file->private_data; |
7c64ec34 CL |
1673 | if (!tu->timeri) |
1674 | return -EBADFD; | |
1da177e4 | 1675 | t = tu->timeri->timer; |
7c64ec34 CL |
1676 | if (!t) |
1677 | return -EBADFD; | |
1da177e4 LT |
1678 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1679 | return -EFAULT; | |
1680 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1681 | err = -EINVAL; | |
1682 | goto _end; | |
1683 | } | |
6b172a85 CL |
1684 | if (params.queue_size > 0 && |
1685 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1686 | err = -EINVAL; |
1687 | goto _end; | |
1688 | } | |
1689 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1690 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1691 | (1<<SNDRV_TIMER_EVENT_START)| | |
1692 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1693 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1694 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1695 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1696 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1697 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1698 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1699 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1700 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1701 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1702 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1703 | err = -EINVAL; |
1704 | goto _end; | |
1705 | } | |
1706 | snd_timer_stop(tu->timeri); | |
1707 | spin_lock_irq(&t->lock); | |
1708 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1709 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1710 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1711 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1712 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1713 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1714 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1715 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1716 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1717 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1718 | if (params.queue_size > 0 && |
1719 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1720 | if (tu->tread) { |
6b172a85 CL |
1721 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1722 | GFP_KERNEL); | |
1da177e4 LT |
1723 | if (ttr) { |
1724 | kfree(tu->tqueue); | |
1725 | tu->queue_size = params.queue_size; | |
1726 | tu->tqueue = ttr; | |
1727 | } | |
1728 | } else { | |
6b172a85 CL |
1729 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1730 | GFP_KERNEL); | |
1da177e4 LT |
1731 | if (tr) { |
1732 | kfree(tu->queue); | |
1733 | tu->queue_size = params.queue_size; | |
1734 | tu->queue = tr; | |
1735 | } | |
1736 | } | |
1737 | } | |
1738 | tu->qhead = tu->qtail = tu->qused = 0; | |
1739 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1740 | if (tu->tread) { | |
53d2f744 | 1741 | struct snd_timer_tread tread; |
cec8f96e | 1742 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1743 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1744 | tread.tstamp.tv_sec = 0; | |
1745 | tread.tstamp.tv_nsec = 0; | |
1746 | tread.val = 0; | |
1747 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1748 | } else { | |
53d2f744 | 1749 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1750 | r->resolution = 0; |
1751 | r->ticks = 0; | |
1752 | tu->qused++; | |
1753 | tu->qtail++; | |
1754 | } | |
1da177e4 LT |
1755 | } |
1756 | tu->filter = params.filter; | |
1757 | tu->ticks = params.ticks; | |
1758 | err = 0; | |
1759 | _end: | |
1760 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1761 | return -EFAULT; | |
1762 | return err; | |
1763 | } | |
1764 | ||
6b172a85 | 1765 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1766 | struct snd_timer_status __user *_status) |
1da177e4 | 1767 | { |
53d2f744 TI |
1768 | struct snd_timer_user *tu; |
1769 | struct snd_timer_status status; | |
6b172a85 | 1770 | |
1da177e4 | 1771 | tu = file->private_data; |
7c64ec34 CL |
1772 | if (!tu->timeri) |
1773 | return -EBADFD; | |
1da177e4 LT |
1774 | memset(&status, 0, sizeof(status)); |
1775 | status.tstamp = tu->tstamp; | |
1776 | status.resolution = snd_timer_resolution(tu->timeri); | |
1777 | status.lost = tu->timeri->lost; | |
1778 | status.overrun = tu->overrun; | |
1779 | spin_lock_irq(&tu->qlock); | |
1780 | status.queue = tu->qused; | |
1781 | spin_unlock_irq(&tu->qlock); | |
1782 | if (copy_to_user(_status, &status, sizeof(status))) | |
1783 | return -EFAULT; | |
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | static int snd_timer_user_start(struct file *file) | |
1788 | { | |
1789 | int err; | |
53d2f744 | 1790 | struct snd_timer_user *tu; |
6b172a85 | 1791 | |
1da177e4 | 1792 | tu = file->private_data; |
7c64ec34 CL |
1793 | if (!tu->timeri) |
1794 | return -EBADFD; | |
1da177e4 LT |
1795 | snd_timer_stop(tu->timeri); |
1796 | tu->timeri->lost = 0; | |
1797 | tu->last_resolution = 0; | |
1798 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1799 | } | |
1800 | ||
1801 | static int snd_timer_user_stop(struct file *file) | |
1802 | { | |
1803 | int err; | |
53d2f744 | 1804 | struct snd_timer_user *tu; |
6b172a85 | 1805 | |
1da177e4 | 1806 | tu = file->private_data; |
7c64ec34 CL |
1807 | if (!tu->timeri) |
1808 | return -EBADFD; | |
1da177e4 LT |
1809 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1810 | } | |
1811 | ||
1812 | static int snd_timer_user_continue(struct file *file) | |
1813 | { | |
1814 | int err; | |
53d2f744 | 1815 | struct snd_timer_user *tu; |
6b172a85 | 1816 | |
1da177e4 | 1817 | tu = file->private_data; |
7c64ec34 CL |
1818 | if (!tu->timeri) |
1819 | return -EBADFD; | |
1da177e4 LT |
1820 | tu->timeri->lost = 0; |
1821 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1822 | } | |
1823 | ||
15790a6b TI |
1824 | static int snd_timer_user_pause(struct file *file) |
1825 | { | |
1826 | int err; | |
53d2f744 | 1827 | struct snd_timer_user *tu; |
6b172a85 | 1828 | |
15790a6b | 1829 | tu = file->private_data; |
7c64ec34 CL |
1830 | if (!tu->timeri) |
1831 | return -EBADFD; | |
d138b445 | 1832 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1833 | } |
1834 | ||
8c50b37c TI |
1835 | enum { |
1836 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1837 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1838 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1839 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1840 | }; | |
1841 | ||
af368027 | 1842 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1843 | unsigned long arg) |
1da177e4 | 1844 | { |
53d2f744 | 1845 | struct snd_timer_user *tu; |
1da177e4 LT |
1846 | void __user *argp = (void __user *)arg; |
1847 | int __user *p = argp; | |
6b172a85 | 1848 | |
1da177e4 LT |
1849 | tu = file->private_data; |
1850 | switch (cmd) { | |
1851 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1852 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1853 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1854 | return snd_timer_user_next_device(argp); | |
1855 | case SNDRV_TIMER_IOCTL_TREAD: | |
1856 | { | |
1857 | int xarg; | |
6b172a85 | 1858 | |
af368027 | 1859 | if (tu->timeri) /* too late */ |
1da177e4 | 1860 | return -EBUSY; |
af368027 | 1861 | if (get_user(xarg, p)) |
1da177e4 LT |
1862 | return -EFAULT; |
1863 | tu->tread = xarg ? 1 : 0; | |
1864 | return 0; | |
1865 | } | |
1866 | case SNDRV_TIMER_IOCTL_GINFO: | |
1867 | return snd_timer_user_ginfo(file, argp); | |
1868 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1869 | return snd_timer_user_gparams(file, argp); | |
1870 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1871 | return snd_timer_user_gstatus(file, argp); | |
1872 | case SNDRV_TIMER_IOCTL_SELECT: | |
1873 | return snd_timer_user_tselect(file, argp); | |
1874 | case SNDRV_TIMER_IOCTL_INFO: | |
1875 | return snd_timer_user_info(file, argp); | |
1876 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1877 | return snd_timer_user_params(file, argp); | |
1878 | case SNDRV_TIMER_IOCTL_STATUS: | |
1879 | return snd_timer_user_status(file, argp); | |
1880 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1881 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1882 | return snd_timer_user_start(file); |
1883 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1884 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1885 | return snd_timer_user_stop(file); |
1886 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1887 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1888 | return snd_timer_user_continue(file); |
15790a6b | 1889 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1890 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1891 | return snd_timer_user_pause(file); |
1da177e4 LT |
1892 | } |
1893 | return -ENOTTY; | |
1894 | } | |
1895 | ||
af368027 TI |
1896 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1897 | unsigned long arg) | |
1898 | { | |
1899 | struct snd_timer_user *tu = file->private_data; | |
1900 | long ret; | |
1901 | ||
1902 | mutex_lock(&tu->ioctl_lock); | |
1903 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
1904 | mutex_unlock(&tu->ioctl_lock); | |
1905 | return ret; | |
1906 | } | |
1907 | ||
1da177e4 LT |
1908 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
1909 | { | |
53d2f744 | 1910 | struct snd_timer_user *tu; |
6b172a85 | 1911 | |
1da177e4 | 1912 | tu = file->private_data; |
60aa4924 | 1913 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
1914 | } |
1915 | ||
6b172a85 CL |
1916 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1917 | size_t count, loff_t *offset) | |
1da177e4 | 1918 | { |
53d2f744 | 1919 | struct snd_timer_user *tu; |
1da177e4 | 1920 | long result = 0, unit; |
4dff5c7b | 1921 | int qhead; |
1da177e4 | 1922 | int err = 0; |
6b172a85 | 1923 | |
1da177e4 | 1924 | tu = file->private_data; |
53d2f744 | 1925 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1926 | spin_lock_irq(&tu->qlock); |
1927 | while ((long)count - result >= unit) { | |
1928 | while (!tu->qused) { | |
1929 | wait_queue_t wait; | |
1930 | ||
1931 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1932 | err = -EAGAIN; | |
4dff5c7b | 1933 | goto _error; |
1da177e4 LT |
1934 | } |
1935 | ||
1936 | set_current_state(TASK_INTERRUPTIBLE); | |
1937 | init_waitqueue_entry(&wait, current); | |
1938 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1939 | ||
1940 | spin_unlock_irq(&tu->qlock); | |
1941 | schedule(); | |
1942 | spin_lock_irq(&tu->qlock); | |
1943 | ||
1944 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1945 | ||
230323da TI |
1946 | if (tu->disconnected) { |
1947 | err = -ENODEV; | |
4dff5c7b | 1948 | goto _error; |
230323da | 1949 | } |
1da177e4 LT |
1950 | if (signal_pending(current)) { |
1951 | err = -ERESTARTSYS; | |
4dff5c7b | 1952 | goto _error; |
1da177e4 LT |
1953 | } |
1954 | } | |
1955 | ||
4dff5c7b TI |
1956 | qhead = tu->qhead++; |
1957 | tu->qhead %= tu->queue_size; | |
3fa6993f | 1958 | tu->qused--; |
1da177e4 | 1959 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1960 | |
1961 | if (tu->tread) { | |
4dff5c7b TI |
1962 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
1963 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 1964 | err = -EFAULT; |
1da177e4 | 1965 | } else { |
4dff5c7b TI |
1966 | if (copy_to_user(buffer, &tu->queue[qhead], |
1967 | sizeof(struct snd_timer_read))) | |
1da177e4 | 1968 | err = -EFAULT; |
1da177e4 LT |
1969 | } |
1970 | ||
1da177e4 | 1971 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
1972 | if (err < 0) |
1973 | goto _error; | |
1974 | result += unit; | |
1975 | buffer += unit; | |
1da177e4 | 1976 | } |
1da177e4 | 1977 | _error: |
4dff5c7b | 1978 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1979 | return result > 0 ? result : err; |
1980 | } | |
1981 | ||
1982 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1983 | { | |
1984 | unsigned int mask; | |
53d2f744 | 1985 | struct snd_timer_user *tu; |
1da177e4 LT |
1986 | |
1987 | tu = file->private_data; | |
1988 | ||
1989 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1990 | |
1da177e4 LT |
1991 | mask = 0; |
1992 | if (tu->qused) | |
1993 | mask |= POLLIN | POLLRDNORM; | |
230323da TI |
1994 | if (tu->disconnected) |
1995 | mask |= POLLERR; | |
1da177e4 LT |
1996 | |
1997 | return mask; | |
1998 | } | |
1999 | ||
2000 | #ifdef CONFIG_COMPAT | |
2001 | #include "timer_compat.c" | |
2002 | #else | |
2003 | #define snd_timer_user_ioctl_compat NULL | |
2004 | #endif | |
2005 | ||
9c2e08c5 | 2006 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2007 | { |
2008 | .owner = THIS_MODULE, | |
2009 | .read = snd_timer_user_read, | |
2010 | .open = snd_timer_user_open, | |
2011 | .release = snd_timer_user_release, | |
02f4865f | 2012 | .llseek = no_llseek, |
1da177e4 LT |
2013 | .poll = snd_timer_user_poll, |
2014 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2015 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2016 | .fasync = snd_timer_user_fasync, | |
2017 | }; | |
2018 | ||
7c35860d TI |
2019 | /* unregister the system timer */ |
2020 | static void snd_timer_free_all(void) | |
2021 | { | |
2022 | struct snd_timer *timer, *n; | |
2023 | ||
2024 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2025 | snd_timer_free(timer); | |
2026 | } | |
2027 | ||
89da061f TI |
2028 | static struct device timer_dev; |
2029 | ||
1da177e4 LT |
2030 | /* |
2031 | * ENTRY functions | |
2032 | */ | |
2033 | ||
1da177e4 LT |
2034 | static int __init alsa_timer_init(void) |
2035 | { | |
2036 | int err; | |
1da177e4 | 2037 | |
89da061f TI |
2038 | snd_device_initialize(&timer_dev, NULL); |
2039 | dev_set_name(&timer_dev, "timer"); | |
2040 | ||
1da177e4 | 2041 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2042 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2043 | "system timer"); | |
1da177e4 | 2044 | #endif |
e28563cc | 2045 | |
7c35860d TI |
2046 | err = snd_timer_register_system(); |
2047 | if (err < 0) { | |
cf74dcf3 | 2048 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
89da061f | 2049 | put_device(&timer_dev); |
7c35860d TI |
2050 | return err; |
2051 | } | |
2052 | ||
40a4b263 TI |
2053 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2054 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2055 | if (err < 0) { |
cf74dcf3 | 2056 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2057 | snd_timer_free_all(); |
89da061f | 2058 | put_device(&timer_dev); |
7c35860d TI |
2059 | return err; |
2060 | } | |
2061 | ||
e28563cc | 2062 | snd_timer_proc_init(); |
1da177e4 LT |
2063 | return 0; |
2064 | } | |
2065 | ||
2066 | static void __exit alsa_timer_exit(void) | |
2067 | { | |
40a4b263 | 2068 | snd_unregister_device(&timer_dev); |
7c35860d | 2069 | snd_timer_free_all(); |
89da061f | 2070 | put_device(&timer_dev); |
e28563cc | 2071 | snd_timer_proc_done(); |
1da177e4 LT |
2072 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2073 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2074 | #endif | |
2075 | } | |
2076 | ||
2077 | module_init(alsa_timer_init) | |
2078 | module_exit(alsa_timer_exit) | |
2079 | ||
2080 | EXPORT_SYMBOL(snd_timer_open); | |
2081 | EXPORT_SYMBOL(snd_timer_close); | |
2082 | EXPORT_SYMBOL(snd_timer_resolution); | |
2083 | EXPORT_SYMBOL(snd_timer_start); | |
2084 | EXPORT_SYMBOL(snd_timer_stop); | |
2085 | EXPORT_SYMBOL(snd_timer_continue); | |
2086 | EXPORT_SYMBOL(snd_timer_pause); | |
2087 | EXPORT_SYMBOL(snd_timer_new); | |
2088 | EXPORT_SYMBOL(snd_timer_notify); | |
2089 | EXPORT_SYMBOL(snd_timer_global_new); | |
2090 | EXPORT_SYMBOL(snd_timer_global_free); | |
2091 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 2092 | EXPORT_SYMBOL(snd_timer_interrupt); |