Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Timers abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/init.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
65a77217 | 28 | #include <linux/module.h> |
543537bd | 29 | #include <linux/string.h> |
1da177e4 LT |
30 | #include <sound/core.h> |
31 | #include <sound/timer.h> | |
32 | #include <sound/control.h> | |
33 | #include <sound/info.h> | |
34 | #include <sound/minors.h> | |
35 | #include <sound/initval.h> | |
36 | #include <linux/kmod.h> | |
1da177e4 | 37 | |
109fef9e CL |
38 | #if defined(CONFIG_SND_HRTIMER) || defined(CONFIG_SND_HRTIMER_MODULE) |
39 | #define DEFAULT_TIMER_LIMIT 4 | |
1da177e4 LT |
40 | #elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE) |
41 | #define DEFAULT_TIMER_LIMIT 2 | |
42 | #else | |
43 | #define DEFAULT_TIMER_LIMIT 1 | |
44 | #endif | |
45 | ||
46 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 47 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 48 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
49 | MODULE_DESCRIPTION("ALSA timer interface"); |
50 | MODULE_LICENSE("GPL"); | |
51 | module_param(timer_limit, int, 0444); | |
52 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
53 | module_param(timer_tstamp_monotonic, int, 0444); |
54 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 55 | |
03cfe6f5 KS |
56 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
57 | MODULE_ALIAS("devname:snd/timer"); | |
58 | ||
53d2f744 TI |
59 | struct snd_timer_user { |
60 | struct snd_timer_instance *timeri; | |
6b172a85 | 61 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
62 | unsigned long ticks; |
63 | unsigned long overrun; | |
64 | int qhead; | |
65 | int qtail; | |
66 | int qused; | |
67 | int queue_size; | |
53d2f744 TI |
68 | struct snd_timer_read *queue; |
69 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
70 | spinlock_t qlock; |
71 | unsigned long last_resolution; | |
72 | unsigned int filter; | |
73 | struct timespec tstamp; /* trigger tstamp */ | |
74 | wait_queue_head_t qchange_sleep; | |
75 | struct fasync_struct *fasync; | |
1a60d4c5 | 76 | struct mutex tread_sem; |
53d2f744 | 77 | }; |
1da177e4 LT |
78 | |
79 | /* list of timers */ | |
80 | static LIST_HEAD(snd_timer_list); | |
81 | ||
82 | /* list of slave instances */ | |
83 | static LIST_HEAD(snd_timer_slave_list); | |
84 | ||
85 | /* lock for slave active lists */ | |
86 | static DEFINE_SPINLOCK(slave_active_lock); | |
87 | ||
1a60d4c5 | 88 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 89 | |
53d2f744 TI |
90 | static int snd_timer_free(struct snd_timer *timer); |
91 | static int snd_timer_dev_free(struct snd_device *device); | |
92 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 93 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 94 | |
53d2f744 | 95 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
96 | |
97 | /* | |
98 | * create a timer instance with the given owner string. | |
99 | * when timer is not NULL, increments the module counter | |
100 | */ | |
53d2f744 TI |
101 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
102 | struct snd_timer *timer) | |
1da177e4 | 103 | { |
53d2f744 | 104 | struct snd_timer_instance *timeri; |
ca2c0966 | 105 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
106 | if (timeri == NULL) |
107 | return NULL; | |
543537bd | 108 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
109 | if (! timeri->owner) { |
110 | kfree(timeri); | |
111 | return NULL; | |
112 | } | |
113 | INIT_LIST_HEAD(&timeri->open_list); | |
114 | INIT_LIST_HEAD(&timeri->active_list); | |
115 | INIT_LIST_HEAD(&timeri->ack_list); | |
116 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
117 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
118 | ||
119 | timeri->timer = timer; | |
de24214d | 120 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
121 | kfree(timeri->owner); |
122 | kfree(timeri); | |
123 | return NULL; | |
124 | } | |
125 | ||
126 | return timeri; | |
127 | } | |
128 | ||
129 | /* | |
130 | * find a timer instance from the given timer id | |
131 | */ | |
53d2f744 | 132 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 133 | { |
53d2f744 | 134 | struct snd_timer *timer = NULL; |
1da177e4 | 135 | |
9244b2c3 | 136 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
137 | if (timer->tmr_class != tid->dev_class) |
138 | continue; | |
139 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
140 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
141 | (timer->card == NULL || | |
142 | timer->card->number != tid->card)) | |
143 | continue; | |
144 | if (timer->tmr_device != tid->device) | |
145 | continue; | |
146 | if (timer->tmr_subdevice != tid->subdevice) | |
147 | continue; | |
148 | return timer; | |
149 | } | |
150 | return NULL; | |
151 | } | |
152 | ||
ee2da997 | 153 | #ifdef CONFIG_MODULES |
1da177e4 | 154 | |
53d2f744 | 155 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 156 | { |
1da177e4 LT |
157 | switch (tid->dev_class) { |
158 | case SNDRV_TIMER_CLASS_GLOBAL: | |
159 | if (tid->device < timer_limit) | |
160 | request_module("snd-timer-%i", tid->device); | |
161 | break; | |
162 | case SNDRV_TIMER_CLASS_CARD: | |
163 | case SNDRV_TIMER_CLASS_PCM: | |
164 | if (tid->card < snd_ecards_limit) | |
165 | request_module("snd-card-%i", tid->card); | |
166 | break; | |
167 | default: | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
172 | #endif | |
173 | ||
174 | /* | |
175 | * look for a master instance matching with the slave id of the given slave. | |
176 | * when found, relink the open_link of the slave. | |
177 | * | |
178 | * call this with register_mutex down. | |
179 | */ | |
53d2f744 | 180 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 181 | { |
53d2f744 TI |
182 | struct snd_timer *timer; |
183 | struct snd_timer_instance *master; | |
1da177e4 LT |
184 | |
185 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
186 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
187 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
188 | if (slave->slave_class == master->slave_class && |
189 | slave->slave_id == master->slave_id) { | |
5b7c757d NK |
190 | list_move_tail(&slave->open_list, |
191 | &master->slave_list_head); | |
1da177e4 LT |
192 | spin_lock_irq(&slave_active_lock); |
193 | slave->master = master; | |
194 | slave->timer = master->timer; | |
195 | spin_unlock_irq(&slave_active_lock); | |
196 | return; | |
197 | } | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | /* | |
203 | * look for slave instances matching with the slave id of the given master. | |
204 | * when found, relink the open_link of slaves. | |
205 | * | |
206 | * call this with register_mutex down. | |
207 | */ | |
53d2f744 | 208 | static void snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 209 | { |
9244b2c3 | 210 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
211 | |
212 | /* check all pending slaves */ | |
9244b2c3 | 213 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
214 | if (slave->slave_class == master->slave_class && |
215 | slave->slave_id == master->slave_id) { | |
9244b2c3 | 216 | list_move_tail(&slave->open_list, &master->slave_list_head); |
1da177e4 LT |
217 | spin_lock_irq(&slave_active_lock); |
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); | |
1da177e4 LT |
223 | spin_unlock_irq(&slave_active_lock); |
224 | } | |
225 | } | |
226 | } | |
227 | ||
228 | /* | |
229 | * open a timer instance | |
230 | * when opening a master, the slave id must be here given. | |
231 | */ | |
53d2f744 TI |
232 | int snd_timer_open(struct snd_timer_instance **ti, |
233 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
234 | unsigned int slave_id) |
235 | { | |
53d2f744 TI |
236 | struct snd_timer *timer; |
237 | struct snd_timer_instance *timeri = NULL; | |
6b172a85 | 238 | |
1da177e4 LT |
239 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
240 | /* open a slave instance */ | |
241 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
242 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
243 | snd_printd("invalid slave class %i\n", tid->dev_sclass); | |
244 | return -EINVAL; | |
245 | } | |
1a60d4c5 | 246 | mutex_lock(®ister_mutex); |
1da177e4 | 247 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 248 | if (!timeri) { |
1a60d4c5 | 249 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
250 | return -ENOMEM; |
251 | } | |
1da177e4 LT |
252 | timeri->slave_class = tid->dev_sclass; |
253 | timeri->slave_id = tid->device; | |
254 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
255 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
256 | snd_timer_check_slave(timeri); | |
1a60d4c5 | 257 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
258 | *ti = timeri; |
259 | return 0; | |
260 | } | |
261 | ||
262 | /* open a master instance */ | |
1a60d4c5 | 263 | mutex_lock(®ister_mutex); |
1da177e4 | 264 | timer = snd_timer_find(tid); |
ee2da997 JB |
265 | #ifdef CONFIG_MODULES |
266 | if (!timer) { | |
1a60d4c5 | 267 | mutex_unlock(®ister_mutex); |
1da177e4 | 268 | snd_timer_request(tid); |
1a60d4c5 | 269 | mutex_lock(®ister_mutex); |
1da177e4 LT |
270 | timer = snd_timer_find(tid); |
271 | } | |
272 | #endif | |
2fd43d11 | 273 | if (!timer) { |
1a60d4c5 | 274 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
275 | return -ENODEV; |
276 | } | |
2fd43d11 CL |
277 | if (!list_empty(&timer->open_list_head)) { |
278 | timeri = list_entry(timer->open_list_head.next, | |
53d2f744 | 279 | struct snd_timer_instance, open_list); |
2fd43d11 | 280 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
1a60d4c5 | 281 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
282 | return -EBUSY; |
283 | } | |
284 | } | |
285 | timeri = snd_timer_instance_new(owner, timer); | |
286 | if (!timeri) { | |
1a60d4c5 | 287 | mutex_unlock(®ister_mutex); |
2fd43d11 CL |
288 | return -ENOMEM; |
289 | } | |
290 | timeri->slave_class = tid->dev_sclass; | |
291 | timeri->slave_id = slave_id; | |
292 | if (list_empty(&timer->open_list_head) && timer->hw.open) | |
293 | timer->hw.open(timer); | |
294 | list_add_tail(&timeri->open_list, &timer->open_list_head); | |
295 | snd_timer_check_master(timeri); | |
1a60d4c5 | 296 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
297 | *ti = timeri; |
298 | return 0; | |
299 | } | |
300 | ||
53d2f744 TI |
301 | static int _snd_timer_stop(struct snd_timer_instance *timeri, |
302 | int keep_flag, int event); | |
1da177e4 LT |
303 | |
304 | /* | |
305 | * close a timer instance | |
306 | */ | |
53d2f744 | 307 | int snd_timer_close(struct snd_timer_instance *timeri) |
1da177e4 | 308 | { |
53d2f744 | 309 | struct snd_timer *timer = NULL; |
9244b2c3 | 310 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 311 | |
0072889a | 312 | if (snd_BUG_ON(!timeri)) |
7eaa943c | 313 | return -ENXIO; |
1da177e4 LT |
314 | |
315 | /* force to stop the timer */ | |
316 | snd_timer_stop(timeri); | |
317 | ||
318 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
319 | /* wait, until the active callback is finished */ | |
320 | spin_lock_irq(&slave_active_lock); | |
321 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
322 | spin_unlock_irq(&slave_active_lock); | |
323 | udelay(10); | |
324 | spin_lock_irq(&slave_active_lock); | |
325 | } | |
326 | spin_unlock_irq(&slave_active_lock); | |
1a60d4c5 | 327 | mutex_lock(®ister_mutex); |
1da177e4 | 328 | list_del(&timeri->open_list); |
1a60d4c5 | 329 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
330 | } else { |
331 | timer = timeri->timer; | |
94094c8a TI |
332 | if (snd_BUG_ON(!timer)) |
333 | goto out; | |
1da177e4 LT |
334 | /* wait, until the active callback is finished */ |
335 | spin_lock_irq(&timer->lock); | |
336 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
337 | spin_unlock_irq(&timer->lock); | |
338 | udelay(10); | |
339 | spin_lock_irq(&timer->lock); | |
340 | } | |
341 | spin_unlock_irq(&timer->lock); | |
1a60d4c5 | 342 | mutex_lock(®ister_mutex); |
1da177e4 | 343 | list_del(&timeri->open_list); |
6b172a85 CL |
344 | if (timer && list_empty(&timer->open_list_head) && |
345 | timer->hw.close) | |
1da177e4 LT |
346 | timer->hw.close(timer); |
347 | /* remove slave links */ | |
9244b2c3 JB |
348 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
349 | open_list) { | |
1da177e4 LT |
350 | spin_lock_irq(&slave_active_lock); |
351 | _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); | |
9244b2c3 | 352 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
1da177e4 LT |
353 | slave->master = NULL; |
354 | slave->timer = NULL; | |
355 | spin_unlock_irq(&slave_active_lock); | |
356 | } | |
1a60d4c5 | 357 | mutex_unlock(®ister_mutex); |
1da177e4 | 358 | } |
94094c8a | 359 | out: |
1da177e4 LT |
360 | if (timeri->private_free) |
361 | timeri->private_free(timeri); | |
362 | kfree(timeri->owner); | |
363 | kfree(timeri); | |
de24214d CL |
364 | if (timer) |
365 | module_put(timer->module); | |
1da177e4 LT |
366 | return 0; |
367 | } | |
368 | ||
53d2f744 | 369 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 370 | { |
53d2f744 | 371 | struct snd_timer * timer; |
1da177e4 LT |
372 | |
373 | if (timeri == NULL) | |
374 | return 0; | |
375 | if ((timer = timeri->timer) != NULL) { | |
376 | if (timer->hw.c_resolution) | |
377 | return timer->hw.c_resolution(timer); | |
378 | return timer->hw.resolution; | |
379 | } | |
380 | return 0; | |
381 | } | |
382 | ||
53d2f744 | 383 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 384 | { |
53d2f744 | 385 | struct snd_timer *timer; |
1da177e4 LT |
386 | unsigned long flags; |
387 | unsigned long resolution = 0; | |
53d2f744 | 388 | struct snd_timer_instance *ts; |
1da177e4 LT |
389 | struct timespec tstamp; |
390 | ||
b751eef1 JK |
391 | if (timer_tstamp_monotonic) |
392 | do_posix_clock_monotonic_gettime(&tstamp); | |
393 | else | |
394 | getnstimeofday(&tstamp); | |
7eaa943c TI |
395 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
396 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
397 | return; | |
6b172a85 CL |
398 | if (event == SNDRV_TIMER_EVENT_START || |
399 | event == SNDRV_TIMER_EVENT_CONTINUE) | |
1da177e4 LT |
400 | resolution = snd_timer_resolution(ti); |
401 | if (ti->ccallback) | |
b30477d5 | 402 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
403 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
404 | return; | |
405 | timer = ti->timer; | |
406 | if (timer == NULL) | |
407 | return; | |
408 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
409 | return; | |
410 | spin_lock_irqsave(&timer->lock, flags); | |
9244b2c3 | 411 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
412 | if (ts->ccallback) |
413 | ts->ccallback(ti, event + 100, &tstamp, resolution); | |
1da177e4 LT |
414 | spin_unlock_irqrestore(&timer->lock, flags); |
415 | } | |
416 | ||
53d2f744 | 417 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
6b172a85 | 418 | unsigned long sticks) |
1da177e4 | 419 | { |
5b7c757d | 420 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
421 | if (timer->running) { |
422 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
423 | goto __start_now; | |
424 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
425 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
426 | return 1; /* delayed start */ | |
427 | } else { | |
428 | timer->sticks = sticks; | |
429 | timer->hw.start(timer); | |
430 | __start_now: | |
431 | timer->running++; | |
432 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
433 | return 0; | |
434 | } | |
435 | } | |
436 | ||
53d2f744 | 437 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
1da177e4 LT |
438 | { |
439 | unsigned long flags; | |
440 | ||
441 | spin_lock_irqsave(&slave_active_lock, flags); | |
442 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
443 | if (timeri->master) | |
6b172a85 CL |
444 | list_add_tail(&timeri->active_list, |
445 | &timeri->master->slave_active_head); | |
1da177e4 LT |
446 | spin_unlock_irqrestore(&slave_active_lock, flags); |
447 | return 1; /* delayed start */ | |
448 | } | |
449 | ||
450 | /* | |
451 | * start the timer instance | |
6b172a85 | 452 | */ |
53d2f744 | 453 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
1da177e4 | 454 | { |
53d2f744 | 455 | struct snd_timer *timer; |
1da177e4 LT |
456 | int result = -EINVAL; |
457 | unsigned long flags; | |
458 | ||
459 | if (timeri == NULL || ticks < 1) | |
460 | return -EINVAL; | |
461 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
462 | result = snd_timer_start_slave(timeri); | |
463 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
464 | return result; | |
465 | } | |
466 | timer = timeri->timer; | |
467 | if (timer == NULL) | |
468 | return -EINVAL; | |
469 | spin_lock_irqsave(&timer->lock, flags); | |
470 | timeri->ticks = timeri->cticks = ticks; | |
471 | timeri->pticks = 0; | |
472 | result = snd_timer_start1(timer, timeri, ticks); | |
473 | spin_unlock_irqrestore(&timer->lock, flags); | |
474 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); | |
475 | return result; | |
476 | } | |
477 | ||
53d2f744 TI |
478 | static int _snd_timer_stop(struct snd_timer_instance * timeri, |
479 | int keep_flag, int event) | |
1da177e4 | 480 | { |
53d2f744 | 481 | struct snd_timer *timer; |
1da177e4 LT |
482 | unsigned long flags; |
483 | ||
7eaa943c TI |
484 | if (snd_BUG_ON(!timeri)) |
485 | return -ENXIO; | |
1da177e4 LT |
486 | |
487 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { | |
488 | if (!keep_flag) { | |
489 | spin_lock_irqsave(&slave_active_lock, flags); | |
490 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
491 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
492 | } | |
493 | goto __end; | |
494 | } | |
495 | timer = timeri->timer; | |
496 | if (!timer) | |
497 | return -EINVAL; | |
498 | spin_lock_irqsave(&timer->lock, flags); | |
499 | list_del_init(&timeri->ack_list); | |
500 | list_del_init(&timeri->active_list); | |
501 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && | |
502 | !(--timer->running)) { | |
503 | timer->hw.stop(timer); | |
504 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
505 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
506 | snd_timer_reschedule(timer, 0); | |
507 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
508 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
509 | timer->hw.start(timer); | |
510 | } | |
511 | } | |
512 | } | |
513 | if (!keep_flag) | |
6b172a85 CL |
514 | timeri->flags &= |
515 | ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); | |
1da177e4 LT |
516 | spin_unlock_irqrestore(&timer->lock, flags); |
517 | __end: | |
518 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) | |
519 | snd_timer_notify1(timeri, event); | |
520 | return 0; | |
521 | } | |
522 | ||
523 | /* | |
524 | * stop the timer instance. | |
525 | * | |
526 | * do not call this from the timer callback! | |
527 | */ | |
53d2f744 | 528 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 529 | { |
53d2f744 | 530 | struct snd_timer *timer; |
1da177e4 LT |
531 | unsigned long flags; |
532 | int err; | |
533 | ||
534 | err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); | |
535 | if (err < 0) | |
536 | return err; | |
537 | timer = timeri->timer; | |
0584ffa5 TI |
538 | if (!timer) |
539 | return -EINVAL; | |
1da177e4 LT |
540 | spin_lock_irqsave(&timer->lock, flags); |
541 | timeri->cticks = timeri->ticks; | |
542 | timeri->pticks = 0; | |
543 | spin_unlock_irqrestore(&timer->lock, flags); | |
544 | return 0; | |
545 | } | |
546 | ||
547 | /* | |
548 | * start again.. the tick is kept. | |
549 | */ | |
53d2f744 | 550 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 551 | { |
53d2f744 | 552 | struct snd_timer *timer; |
1da177e4 LT |
553 | int result = -EINVAL; |
554 | unsigned long flags; | |
555 | ||
556 | if (timeri == NULL) | |
557 | return result; | |
558 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
559 | return snd_timer_start_slave(timeri); | |
560 | timer = timeri->timer; | |
561 | if (! timer) | |
562 | return -EINVAL; | |
563 | spin_lock_irqsave(&timer->lock, flags); | |
564 | if (!timeri->cticks) | |
565 | timeri->cticks = 1; | |
566 | timeri->pticks = 0; | |
567 | result = snd_timer_start1(timer, timeri, timer->sticks); | |
568 | spin_unlock_irqrestore(&timer->lock, flags); | |
569 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); | |
570 | return result; | |
571 | } | |
572 | ||
573 | /* | |
574 | * pause.. remember the ticks left | |
575 | */ | |
53d2f744 | 576 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 LT |
577 | { |
578 | return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); | |
579 | } | |
580 | ||
581 | /* | |
582 | * reschedule the timer | |
583 | * | |
584 | * start pending instances and check the scheduling ticks. | |
585 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
586 | */ | |
53d2f744 | 587 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 588 | { |
53d2f744 | 589 | struct snd_timer_instance *ti; |
1da177e4 | 590 | unsigned long ticks = ~0UL; |
1da177e4 | 591 | |
9244b2c3 | 592 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
593 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
594 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
595 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
596 | timer->running++; | |
597 | } | |
598 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
599 | if (ticks > ti->cticks) | |
600 | ticks = ti->cticks; | |
601 | } | |
602 | } | |
603 | if (ticks == ~0UL) { | |
604 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
605 | return; | |
606 | } | |
607 | if (ticks > timer->hw.ticks) | |
608 | ticks = timer->hw.ticks; | |
609 | if (ticks_left != ticks) | |
610 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
611 | timer->sticks = ticks; | |
612 | } | |
613 | ||
614 | /* | |
615 | * timer tasklet | |
616 | * | |
617 | */ | |
618 | static void snd_timer_tasklet(unsigned long arg) | |
619 | { | |
53d2f744 TI |
620 | struct snd_timer *timer = (struct snd_timer *) arg; |
621 | struct snd_timer_instance *ti; | |
1da177e4 LT |
622 | struct list_head *p; |
623 | unsigned long resolution, ticks; | |
2999ff5b | 624 | unsigned long flags; |
1da177e4 | 625 | |
2999ff5b | 626 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
627 | /* now process all callbacks */ |
628 | while (!list_empty(&timer->sack_list_head)) { | |
629 | p = timer->sack_list_head.next; /* get first item */ | |
53d2f744 | 630 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
1da177e4 LT |
631 | |
632 | /* remove from ack_list and make empty */ | |
633 | list_del_init(p); | |
6b172a85 | 634 | |
1da177e4 LT |
635 | ticks = ti->pticks; |
636 | ti->pticks = 0; | |
637 | resolution = ti->resolution; | |
638 | ||
639 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
640 | spin_unlock(&timer->lock); | |
641 | if (ti->callback) | |
642 | ti->callback(ti, resolution, ticks); | |
643 | spin_lock(&timer->lock); | |
644 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
645 | } | |
2999ff5b | 646 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
647 | } |
648 | ||
649 | /* | |
650 | * timer interrupt | |
651 | * | |
652 | * ticks_left is usually equal to timer->sticks. | |
653 | * | |
654 | */ | |
53d2f744 | 655 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 656 | { |
9244b2c3 | 657 | struct snd_timer_instance *ti, *ts, *tmp; |
1da177e4 | 658 | unsigned long resolution, ticks; |
9244b2c3 | 659 | struct list_head *p, *ack_list_head; |
b32425ac | 660 | unsigned long flags; |
1da177e4 LT |
661 | int use_tasklet = 0; |
662 | ||
663 | if (timer == NULL) | |
664 | return; | |
665 | ||
b32425ac | 666 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
667 | |
668 | /* remember the current resolution */ | |
669 | if (timer->hw.c_resolution) | |
670 | resolution = timer->hw.c_resolution(timer); | |
671 | else | |
672 | resolution = timer->hw.resolution; | |
673 | ||
674 | /* loop for all active instances | |
9244b2c3 | 675 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
676 | * processed instance is relinked to done_list_head before the callback |
677 | * is called. | |
1da177e4 | 678 | */ |
9244b2c3 JB |
679 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
680 | active_list) { | |
1da177e4 LT |
681 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
682 | continue; | |
683 | ti->pticks += ticks_left; | |
684 | ti->resolution = resolution; | |
685 | if (ti->cticks < ticks_left) | |
686 | ti->cticks = 0; | |
687 | else | |
688 | ti->cticks -= ticks_left; | |
689 | if (ti->cticks) /* not expired */ | |
690 | continue; | |
691 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
692 | ti->cticks = ti->ticks; | |
693 | } else { | |
694 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
695 | if (--timer->running) | |
9244b2c3 | 696 | list_del(&ti->active_list); |
1da177e4 | 697 | } |
6b172a85 CL |
698 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
699 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
700 | ack_list_head = &timer->ack_list_head; | |
701 | else | |
702 | ack_list_head = &timer->sack_list_head; | |
703 | if (list_empty(&ti->ack_list)) | |
704 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 705 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
706 | ts->pticks = ti->pticks; |
707 | ts->resolution = resolution; | |
6b172a85 CL |
708 | if (list_empty(&ts->ack_list)) |
709 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
710 | } |
711 | } | |
712 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 713 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
714 | if (timer->running) { |
715 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
716 | timer->hw.stop(timer); | |
717 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
718 | } | |
719 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
720 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
721 | /* restart timer */ | |
722 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
723 | timer->hw.start(timer); | |
724 | } | |
725 | } else { | |
726 | timer->hw.stop(timer); | |
727 | } | |
728 | ||
729 | /* now process all fast callbacks */ | |
730 | while (!list_empty(&timer->ack_list_head)) { | |
731 | p = timer->ack_list_head.next; /* get first item */ | |
53d2f744 | 732 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
6b172a85 | 733 | |
1da177e4 LT |
734 | /* remove from ack_list and make empty */ |
735 | list_del_init(p); | |
6b172a85 | 736 | |
1da177e4 LT |
737 | ticks = ti->pticks; |
738 | ti->pticks = 0; | |
739 | ||
740 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; | |
741 | spin_unlock(&timer->lock); | |
742 | if (ti->callback) | |
743 | ti->callback(ti, resolution, ticks); | |
744 | spin_lock(&timer->lock); | |
745 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; | |
746 | } | |
747 | ||
748 | /* do we have any slow callbacks? */ | |
749 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 750 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
751 | |
752 | if (use_tasklet) | |
1f04128a | 753 | tasklet_schedule(&timer->task_queue); |
1da177e4 LT |
754 | } |
755 | ||
756 | /* | |
757 | ||
758 | */ | |
759 | ||
53d2f744 TI |
760 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
761 | struct snd_timer **rtimer) | |
1da177e4 | 762 | { |
53d2f744 | 763 | struct snd_timer *timer; |
1da177e4 | 764 | int err; |
53d2f744 | 765 | static struct snd_device_ops ops = { |
1da177e4 LT |
766 | .dev_free = snd_timer_dev_free, |
767 | .dev_register = snd_timer_dev_register, | |
c461482c | 768 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
769 | }; |
770 | ||
7eaa943c TI |
771 | if (snd_BUG_ON(!tid)) |
772 | return -EINVAL; | |
773 | if (rtimer) | |
774 | *rtimer = NULL; | |
ca2c0966 | 775 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
73e77ba0 TI |
776 | if (timer == NULL) { |
777 | snd_printk(KERN_ERR "timer: cannot allocate\n"); | |
1da177e4 | 778 | return -ENOMEM; |
73e77ba0 | 779 | } |
1da177e4 LT |
780 | timer->tmr_class = tid->dev_class; |
781 | timer->card = card; | |
782 | timer->tmr_device = tid->device; | |
783 | timer->tmr_subdevice = tid->subdevice; | |
784 | if (id) | |
785 | strlcpy(timer->id, id, sizeof(timer->id)); | |
786 | INIT_LIST_HEAD(&timer->device_list); | |
787 | INIT_LIST_HEAD(&timer->open_list_head); | |
788 | INIT_LIST_HEAD(&timer->active_list_head); | |
789 | INIT_LIST_HEAD(&timer->ack_list_head); | |
790 | INIT_LIST_HEAD(&timer->sack_list_head); | |
791 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
792 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
793 | (unsigned long)timer); | |
1da177e4 | 794 | if (card != NULL) { |
de24214d | 795 | timer->module = card->module; |
6b172a85 CL |
796 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
797 | if (err < 0) { | |
1da177e4 LT |
798 | snd_timer_free(timer); |
799 | return err; | |
800 | } | |
801 | } | |
7eaa943c TI |
802 | if (rtimer) |
803 | *rtimer = timer; | |
1da177e4 LT |
804 | return 0; |
805 | } | |
806 | ||
53d2f744 | 807 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 808 | { |
7eaa943c TI |
809 | if (!timer) |
810 | return 0; | |
c461482c TI |
811 | |
812 | mutex_lock(®ister_mutex); | |
813 | if (! list_empty(&timer->open_list_head)) { | |
814 | struct list_head *p, *n; | |
815 | struct snd_timer_instance *ti; | |
816 | snd_printk(KERN_WARNING "timer %p is busy?\n", timer); | |
817 | list_for_each_safe(p, n, &timer->open_list_head) { | |
818 | list_del_init(p); | |
819 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
820 | ti->timer = NULL; | |
821 | } | |
822 | } | |
823 | list_del(&timer->device_list); | |
824 | mutex_unlock(®ister_mutex); | |
825 | ||
1da177e4 LT |
826 | if (timer->private_free) |
827 | timer->private_free(timer); | |
828 | kfree(timer); | |
829 | return 0; | |
830 | } | |
831 | ||
53d2f744 | 832 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 833 | { |
53d2f744 | 834 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
835 | return snd_timer_free(timer); |
836 | } | |
837 | ||
53d2f744 | 838 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 839 | { |
53d2f744 TI |
840 | struct snd_timer *timer = dev->device_data; |
841 | struct snd_timer *timer1; | |
1da177e4 | 842 | |
7eaa943c TI |
843 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
844 | return -ENXIO; | |
1da177e4 LT |
845 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
846 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
847 | return -EINVAL; | |
848 | ||
1a60d4c5 | 849 | mutex_lock(®ister_mutex); |
9244b2c3 | 850 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
851 | if (timer1->tmr_class > timer->tmr_class) |
852 | break; | |
853 | if (timer1->tmr_class < timer->tmr_class) | |
854 | continue; | |
855 | if (timer1->card && timer->card) { | |
856 | if (timer1->card->number > timer->card->number) | |
857 | break; | |
858 | if (timer1->card->number < timer->card->number) | |
859 | continue; | |
860 | } | |
861 | if (timer1->tmr_device > timer->tmr_device) | |
862 | break; | |
863 | if (timer1->tmr_device < timer->tmr_device) | |
864 | continue; | |
865 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
866 | break; | |
867 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
868 | continue; | |
869 | /* conflicts.. */ | |
1a60d4c5 | 870 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
871 | return -EBUSY; |
872 | } | |
9244b2c3 | 873 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 874 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
875 | return 0; |
876 | } | |
877 | ||
c461482c | 878 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 879 | { |
c461482c | 880 | struct snd_timer *timer = device->device_data; |
1a60d4c5 | 881 | mutex_lock(®ister_mutex); |
c461482c | 882 | list_del_init(&timer->device_list); |
1a60d4c5 | 883 | mutex_unlock(®ister_mutex); |
c461482c | 884 | return 0; |
1da177e4 LT |
885 | } |
886 | ||
53d2f744 | 887 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
888 | { |
889 | unsigned long flags; | |
890 | unsigned long resolution = 0; | |
53d2f744 | 891 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 892 | |
7c22f1aa TI |
893 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
894 | return; | |
7eaa943c TI |
895 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
896 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
897 | return; | |
1da177e4 | 898 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
899 | if (event == SNDRV_TIMER_EVENT_MSTART || |
900 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
901 | event == SNDRV_TIMER_EVENT_MRESUME) { | |
1da177e4 LT |
902 | if (timer->hw.c_resolution) |
903 | resolution = timer->hw.c_resolution(timer); | |
904 | else | |
905 | resolution = timer->hw.resolution; | |
906 | } | |
9244b2c3 | 907 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
908 | if (ti->ccallback) |
909 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 910 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
911 | if (ts->ccallback) |
912 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
913 | } |
914 | spin_unlock_irqrestore(&timer->lock, flags); | |
915 | } | |
916 | ||
917 | /* | |
918 | * exported functions for global timers | |
919 | */ | |
53d2f744 | 920 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 921 | { |
53d2f744 | 922 | struct snd_timer_id tid; |
6b172a85 | 923 | |
1da177e4 LT |
924 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
925 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
926 | tid.card = -1; | |
927 | tid.device = device; | |
928 | tid.subdevice = 0; | |
929 | return snd_timer_new(NULL, id, &tid, rtimer); | |
930 | } | |
931 | ||
53d2f744 | 932 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
933 | { |
934 | return snd_timer_free(timer); | |
935 | } | |
936 | ||
53d2f744 | 937 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 938 | { |
53d2f744 | 939 | struct snd_device dev; |
1da177e4 LT |
940 | |
941 | memset(&dev, 0, sizeof(dev)); | |
942 | dev.device_data = timer; | |
943 | return snd_timer_dev_register(&dev); | |
944 | } | |
945 | ||
6b172a85 | 946 | /* |
1da177e4 LT |
947 | * System timer |
948 | */ | |
949 | ||
950 | struct snd_timer_system_private { | |
951 | struct timer_list tlist; | |
1da177e4 LT |
952 | unsigned long last_expires; |
953 | unsigned long last_jiffies; | |
954 | unsigned long correction; | |
955 | }; | |
956 | ||
1da177e4 LT |
957 | static void snd_timer_s_function(unsigned long data) |
958 | { | |
53d2f744 | 959 | struct snd_timer *timer = (struct snd_timer *)data; |
1da177e4 LT |
960 | struct snd_timer_system_private *priv = timer->private_data; |
961 | unsigned long jiff = jiffies; | |
962 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 963 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
964 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
965 | } | |
966 | ||
53d2f744 | 967 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
968 | { |
969 | struct snd_timer_system_private *priv; | |
970 | unsigned long njiff; | |
971 | ||
972 | priv = (struct snd_timer_system_private *) timer->private_data; | |
973 | njiff = (priv->last_jiffies = jiffies); | |
974 | if (priv->correction > timer->sticks - 1) { | |
975 | priv->correction -= timer->sticks - 1; | |
976 | njiff++; | |
977 | } else { | |
978 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 979 | priv->correction = 0; |
1da177e4 LT |
980 | } |
981 | priv->last_expires = priv->tlist.expires = njiff; | |
982 | add_timer(&priv->tlist); | |
983 | return 0; | |
984 | } | |
985 | ||
53d2f744 | 986 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
987 | { |
988 | struct snd_timer_system_private *priv; | |
989 | unsigned long jiff; | |
990 | ||
991 | priv = (struct snd_timer_system_private *) timer->private_data; | |
992 | del_timer(&priv->tlist); | |
993 | jiff = jiffies; | |
994 | if (time_before(jiff, priv->last_expires)) | |
995 | timer->sticks = priv->last_expires - jiff; | |
996 | else | |
997 | timer->sticks = 1; | |
de2696d8 | 998 | priv->correction = 0; |
1da177e4 LT |
999 | return 0; |
1000 | } | |
1001 | ||
53d2f744 | 1002 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1003 | { |
1004 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1005 | .resolution = 1000000000L / HZ, | |
1006 | .ticks = 10000000L, | |
1007 | .start = snd_timer_s_start, | |
1008 | .stop = snd_timer_s_stop | |
1009 | }; | |
1010 | ||
53d2f744 | 1011 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1012 | { |
1013 | kfree(timer->private_data); | |
1014 | } | |
1015 | ||
1016 | static int snd_timer_register_system(void) | |
1017 | { | |
53d2f744 | 1018 | struct snd_timer *timer; |
1da177e4 LT |
1019 | struct snd_timer_system_private *priv; |
1020 | int err; | |
1021 | ||
6b172a85 CL |
1022 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1023 | if (err < 0) | |
1da177e4 LT |
1024 | return err; |
1025 | strcpy(timer->name, "system timer"); | |
1026 | timer->hw = snd_timer_system; | |
ca2c0966 | 1027 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1028 | if (priv == NULL) { |
1029 | snd_timer_free(timer); | |
1030 | return -ENOMEM; | |
1031 | } | |
1032 | init_timer(&priv->tlist); | |
1033 | priv->tlist.function = snd_timer_s_function; | |
1034 | priv->tlist.data = (unsigned long) timer; | |
1035 | timer->private_data = priv; | |
1036 | timer->private_free = snd_timer_free_system; | |
1037 | return snd_timer_global_register(timer); | |
1038 | } | |
1039 | ||
e28563cc | 1040 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1041 | /* |
1042 | * Info interface | |
1043 | */ | |
1044 | ||
53d2f744 TI |
1045 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1046 | struct snd_info_buffer *buffer) | |
1da177e4 | 1047 | { |
53d2f744 TI |
1048 | struct snd_timer *timer; |
1049 | struct snd_timer_instance *ti; | |
1da177e4 | 1050 | |
1a60d4c5 | 1051 | mutex_lock(®ister_mutex); |
9244b2c3 | 1052 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
1053 | switch (timer->tmr_class) { |
1054 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1055 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1056 | break; | |
1057 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1058 | snd_iprintf(buffer, "C%i-%i: ", |
1059 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1060 | break; |
1061 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1062 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1063 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1064 | break; |
1065 | default: | |
6b172a85 CL |
1066 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1067 | timer->card ? timer->card->number : -1, | |
1068 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1069 | } |
1070 | snd_iprintf(buffer, "%s :", timer->name); | |
1071 | if (timer->hw.resolution) | |
6b172a85 CL |
1072 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1073 | timer->hw.resolution / 1000, | |
1074 | timer->hw.resolution % 1000, | |
1075 | timer->hw.ticks); | |
1da177e4 LT |
1076 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1077 | snd_iprintf(buffer, " SLAVE"); | |
1078 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1079 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1080 | snd_iprintf(buffer, " Client %s : %s\n", |
1081 | ti->owner ? ti->owner : "unknown", | |
1082 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1083 | SNDRV_TIMER_IFLG_RUNNING) | |
1084 | ? "running" : "stopped"); | |
1da177e4 | 1085 | } |
1a60d4c5 | 1086 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1087 | } |
1088 | ||
6581f4e7 | 1089 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1090 | |
1091 | static void __init snd_timer_proc_init(void) | |
1092 | { | |
1093 | struct snd_info_entry *entry; | |
1094 | ||
1095 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1096 | if (entry != NULL) { | |
e28563cc TI |
1097 | entry->c.text.read = snd_timer_proc_read; |
1098 | if (snd_info_register(entry) < 0) { | |
1099 | snd_info_free_entry(entry); | |
1100 | entry = NULL; | |
1101 | } | |
1102 | } | |
1103 | snd_timer_proc_entry = entry; | |
1104 | } | |
1105 | ||
1106 | static void __exit snd_timer_proc_done(void) | |
1107 | { | |
746d4a02 | 1108 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc TI |
1109 | } |
1110 | #else /* !CONFIG_PROC_FS */ | |
1111 | #define snd_timer_proc_init() | |
1112 | #define snd_timer_proc_done() | |
1113 | #endif | |
1114 | ||
1da177e4 LT |
1115 | /* |
1116 | * USER SPACE interface | |
1117 | */ | |
1118 | ||
53d2f744 | 1119 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1120 | unsigned long resolution, |
1121 | unsigned long ticks) | |
1122 | { | |
53d2f744 TI |
1123 | struct snd_timer_user *tu = timeri->callback_data; |
1124 | struct snd_timer_read *r; | |
1da177e4 | 1125 | int prev; |
6b172a85 | 1126 | |
1da177e4 LT |
1127 | spin_lock(&tu->qlock); |
1128 | if (tu->qused > 0) { | |
1129 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1130 | r = &tu->queue[prev]; | |
1131 | if (r->resolution == resolution) { | |
1132 | r->ticks += ticks; | |
1133 | goto __wake; | |
1134 | } | |
1135 | } | |
1136 | if (tu->qused >= tu->queue_size) { | |
1137 | tu->overrun++; | |
1138 | } else { | |
1139 | r = &tu->queue[tu->qtail++]; | |
1140 | tu->qtail %= tu->queue_size; | |
1141 | r->resolution = resolution; | |
1142 | r->ticks = ticks; | |
1143 | tu->qused++; | |
1144 | } | |
1145 | __wake: | |
1146 | spin_unlock(&tu->qlock); | |
1147 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1148 | wake_up(&tu->qchange_sleep); | |
1149 | } | |
1150 | ||
53d2f744 TI |
1151 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1152 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1153 | { |
1154 | if (tu->qused >= tu->queue_size) { | |
1155 | tu->overrun++; | |
1156 | } else { | |
1157 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1158 | tu->qtail %= tu->queue_size; | |
1159 | tu->qused++; | |
1160 | } | |
1161 | } | |
1162 | ||
53d2f744 TI |
1163 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1164 | int event, | |
1da177e4 LT |
1165 | struct timespec *tstamp, |
1166 | unsigned long resolution) | |
1167 | { | |
53d2f744 TI |
1168 | struct snd_timer_user *tu = timeri->callback_data; |
1169 | struct snd_timer_tread r1; | |
bfe70783 | 1170 | unsigned long flags; |
1da177e4 | 1171 | |
6b172a85 CL |
1172 | if (event >= SNDRV_TIMER_EVENT_START && |
1173 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1174 | tu->tstamp = *tstamp; |
1175 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1176 | return; | |
1177 | r1.event = event; | |
1178 | r1.tstamp = *tstamp; | |
1179 | r1.val = resolution; | |
bfe70783 | 1180 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1181 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1182 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1183 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1184 | wake_up(&tu->qchange_sleep); | |
1185 | } | |
1186 | ||
53d2f744 | 1187 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1188 | unsigned long resolution, |
1189 | unsigned long ticks) | |
1190 | { | |
53d2f744 TI |
1191 | struct snd_timer_user *tu = timeri->callback_data; |
1192 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1193 | struct timespec tstamp; |
1194 | int prev, append = 0; | |
1195 | ||
07799e75 | 1196 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1197 | spin_lock(&tu->qlock); |
6b172a85 CL |
1198 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1199 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1200 | spin_unlock(&tu->qlock); |
1201 | return; | |
1202 | } | |
b751eef1 JK |
1203 | if (tu->last_resolution != resolution || ticks > 0) { |
1204 | if (timer_tstamp_monotonic) | |
1205 | do_posix_clock_monotonic_gettime(&tstamp); | |
1206 | else | |
1207 | getnstimeofday(&tstamp); | |
1208 | } | |
6b172a85 CL |
1209 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1210 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1211 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1212 | r1.tstamp = tstamp; | |
1213 | r1.val = resolution; | |
1214 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1215 | tu->last_resolution = resolution; | |
1216 | append++; | |
1217 | } | |
1218 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1219 | goto __wake; | |
1220 | if (ticks == 0) | |
1221 | goto __wake; | |
1222 | if (tu->qused > 0) { | |
1223 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1224 | r = &tu->tqueue[prev]; | |
1225 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1226 | r->tstamp = tstamp; | |
1227 | r->val += ticks; | |
1228 | append++; | |
1229 | goto __wake; | |
1230 | } | |
1231 | } | |
1232 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1233 | r1.tstamp = tstamp; | |
1234 | r1.val = ticks; | |
1235 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1236 | append++; | |
1237 | __wake: | |
1238 | spin_unlock(&tu->qlock); | |
1239 | if (append == 0) | |
1240 | return; | |
1241 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1242 | wake_up(&tu->qchange_sleep); | |
1243 | } | |
1244 | ||
1245 | static int snd_timer_user_open(struct inode *inode, struct file *file) | |
1246 | { | |
53d2f744 | 1247 | struct snd_timer_user *tu; |
02f4865f TI |
1248 | int err; |
1249 | ||
1250 | err = nonseekable_open(inode, file); | |
1251 | if (err < 0) | |
1252 | return err; | |
6b172a85 | 1253 | |
ca2c0966 | 1254 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1255 | if (tu == NULL) |
1256 | return -ENOMEM; | |
1257 | spin_lock_init(&tu->qlock); | |
1258 | init_waitqueue_head(&tu->qchange_sleep); | |
1a60d4c5 | 1259 | mutex_init(&tu->tread_sem); |
1da177e4 LT |
1260 | tu->ticks = 1; |
1261 | tu->queue_size = 128; | |
53d2f744 | 1262 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1263 | GFP_KERNEL); |
1da177e4 LT |
1264 | if (tu->queue == NULL) { |
1265 | kfree(tu); | |
1266 | return -ENOMEM; | |
1267 | } | |
1268 | file->private_data = tu; | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1273 | { | |
53d2f744 | 1274 | struct snd_timer_user *tu; |
1da177e4 LT |
1275 | |
1276 | if (file->private_data) { | |
1277 | tu = file->private_data; | |
1278 | file->private_data = NULL; | |
1da177e4 LT |
1279 | if (tu->timeri) |
1280 | snd_timer_close(tu->timeri); | |
1281 | kfree(tu->queue); | |
1282 | kfree(tu->tqueue); | |
1283 | kfree(tu); | |
1284 | } | |
1285 | return 0; | |
1286 | } | |
1287 | ||
53d2f744 | 1288 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1289 | { |
1290 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1291 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1292 | id->card = -1; | |
1293 | id->device = -1; | |
1294 | id->subdevice = -1; | |
1295 | } | |
1296 | ||
53d2f744 | 1297 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1298 | { |
1299 | id->dev_class = timer->tmr_class; | |
1300 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1301 | id->card = timer->card ? timer->card->number : -1; | |
1302 | id->device = timer->tmr_device; | |
1303 | id->subdevice = timer->tmr_subdevice; | |
1304 | } | |
1305 | ||
53d2f744 | 1306 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1307 | { |
53d2f744 TI |
1308 | struct snd_timer_id id; |
1309 | struct snd_timer *timer; | |
1da177e4 | 1310 | struct list_head *p; |
6b172a85 | 1311 | |
1da177e4 LT |
1312 | if (copy_from_user(&id, _tid, sizeof(id))) |
1313 | return -EFAULT; | |
1a60d4c5 | 1314 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1315 | if (id.dev_class < 0) { /* first item */ |
1316 | if (list_empty(&snd_timer_list)) | |
1317 | snd_timer_user_zero_id(&id); | |
1318 | else { | |
9dfba380 | 1319 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1320 | struct snd_timer, device_list); |
1da177e4 LT |
1321 | snd_timer_user_copy_id(&id, timer); |
1322 | } | |
1323 | } else { | |
1324 | switch (id.dev_class) { | |
1325 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1326 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1327 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1328 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1329 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1330 | snd_timer_user_copy_id(&id, timer); | |
1331 | break; | |
1332 | } | |
1333 | if (timer->tmr_device >= id.device) { | |
1334 | snd_timer_user_copy_id(&id, timer); | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | if (p == &snd_timer_list) | |
1339 | snd_timer_user_zero_id(&id); | |
1340 | break; | |
1341 | case SNDRV_TIMER_CLASS_CARD: | |
1342 | case SNDRV_TIMER_CLASS_PCM: | |
1343 | if (id.card < 0) { | |
1344 | id.card = 0; | |
1345 | } else { | |
1346 | if (id.card < 0) { | |
1347 | id.card = 0; | |
1348 | } else { | |
1349 | if (id.device < 0) { | |
1350 | id.device = 0; | |
1351 | } else { | |
6b172a85 CL |
1352 | if (id.subdevice < 0) { |
1353 | id.subdevice = 0; | |
1354 | } else { | |
1355 | id.subdevice++; | |
1356 | } | |
1da177e4 LT |
1357 | } |
1358 | } | |
1359 | } | |
1360 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1361 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1362 | if (timer->tmr_class > id.dev_class) { |
1363 | snd_timer_user_copy_id(&id, timer); | |
1364 | break; | |
1365 | } | |
1366 | if (timer->tmr_class < id.dev_class) | |
1367 | continue; | |
1368 | if (timer->card->number > id.card) { | |
1369 | snd_timer_user_copy_id(&id, timer); | |
1370 | break; | |
1371 | } | |
1372 | if (timer->card->number < id.card) | |
1373 | continue; | |
1374 | if (timer->tmr_device > id.device) { | |
1375 | snd_timer_user_copy_id(&id, timer); | |
1376 | break; | |
1377 | } | |
1378 | if (timer->tmr_device < id.device) | |
1379 | continue; | |
1380 | if (timer->tmr_subdevice > id.subdevice) { | |
1381 | snd_timer_user_copy_id(&id, timer); | |
1382 | break; | |
1383 | } | |
1384 | if (timer->tmr_subdevice < id.subdevice) | |
1385 | continue; | |
1386 | snd_timer_user_copy_id(&id, timer); | |
1387 | break; | |
1388 | } | |
1389 | if (p == &snd_timer_list) | |
1390 | snd_timer_user_zero_id(&id); | |
1391 | break; | |
1392 | default: | |
1393 | snd_timer_user_zero_id(&id); | |
1394 | } | |
1395 | } | |
1a60d4c5 | 1396 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1397 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1398 | return -EFAULT; | |
1399 | return 0; | |
6b172a85 | 1400 | } |
1da177e4 | 1401 | |
6b172a85 | 1402 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1403 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1404 | { |
53d2f744 TI |
1405 | struct snd_timer_ginfo *ginfo; |
1406 | struct snd_timer_id tid; | |
1407 | struct snd_timer *t; | |
1da177e4 LT |
1408 | struct list_head *p; |
1409 | int err = 0; | |
1410 | ||
ef44a1ec LZ |
1411 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1412 | if (IS_ERR(ginfo)) | |
1413 | return PTR_ERR(ginfo); | |
1414 | ||
1da177e4 LT |
1415 | tid = ginfo->tid; |
1416 | memset(ginfo, 0, sizeof(*ginfo)); | |
1417 | ginfo->tid = tid; | |
1a60d4c5 | 1418 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1419 | t = snd_timer_find(&tid); |
1420 | if (t != NULL) { | |
1421 | ginfo->card = t->card ? t->card->number : -1; | |
1422 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1423 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1424 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1425 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1426 | ginfo->resolution = t->hw.resolution; | |
1427 | if (t->hw.resolution_min > 0) { | |
1428 | ginfo->resolution_min = t->hw.resolution_min; | |
1429 | ginfo->resolution_max = t->hw.resolution_max; | |
1430 | } | |
1431 | list_for_each(p, &t->open_list_head) { | |
1432 | ginfo->clients++; | |
1433 | } | |
1434 | } else { | |
1435 | err = -ENODEV; | |
1436 | } | |
1a60d4c5 | 1437 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1438 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1439 | err = -EFAULT; | |
1440 | kfree(ginfo); | |
1441 | return err; | |
1442 | } | |
1443 | ||
6b172a85 | 1444 | static int snd_timer_user_gparams(struct file *file, |
53d2f744 | 1445 | struct snd_timer_gparams __user *_gparams) |
1da177e4 | 1446 | { |
53d2f744 TI |
1447 | struct snd_timer_gparams gparams; |
1448 | struct snd_timer *t; | |
1da177e4 LT |
1449 | int err; |
1450 | ||
1451 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1452 | return -EFAULT; | |
1a60d4c5 | 1453 | mutex_lock(®ister_mutex); |
1da177e4 | 1454 | t = snd_timer_find(&gparams.tid); |
6b172a85 | 1455 | if (!t) { |
1da177e4 | 1456 | err = -ENODEV; |
6b172a85 CL |
1457 | goto _error; |
1458 | } | |
1459 | if (!list_empty(&t->open_list_head)) { | |
1460 | err = -EBUSY; | |
1461 | goto _error; | |
1462 | } | |
1463 | if (!t->hw.set_period) { | |
1464 | err = -ENOSYS; | |
1465 | goto _error; | |
1da177e4 | 1466 | } |
6b172a85 CL |
1467 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
1468 | _error: | |
1a60d4c5 | 1469 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1470 | return err; |
1471 | } | |
1472 | ||
6b172a85 | 1473 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1474 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1475 | { |
53d2f744 TI |
1476 | struct snd_timer_gstatus gstatus; |
1477 | struct snd_timer_id tid; | |
1478 | struct snd_timer *t; | |
1da177e4 LT |
1479 | int err = 0; |
1480 | ||
1481 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1482 | return -EFAULT; | |
1483 | tid = gstatus.tid; | |
1484 | memset(&gstatus, 0, sizeof(gstatus)); | |
1485 | gstatus.tid = tid; | |
1a60d4c5 | 1486 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1487 | t = snd_timer_find(&tid); |
1488 | if (t != NULL) { | |
1489 | if (t->hw.c_resolution) | |
1490 | gstatus.resolution = t->hw.c_resolution(t); | |
1491 | else | |
1492 | gstatus.resolution = t->hw.resolution; | |
1493 | if (t->hw.precise_resolution) { | |
6b172a85 CL |
1494 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1495 | &gstatus.resolution_den); | |
1da177e4 LT |
1496 | } else { |
1497 | gstatus.resolution_num = gstatus.resolution; | |
1498 | gstatus.resolution_den = 1000000000uL; | |
1499 | } | |
1500 | } else { | |
1501 | err = -ENODEV; | |
1502 | } | |
1a60d4c5 | 1503 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1504 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1505 | err = -EFAULT; | |
1506 | return err; | |
1507 | } | |
1508 | ||
6b172a85 | 1509 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1510 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1511 | { |
53d2f744 TI |
1512 | struct snd_timer_user *tu; |
1513 | struct snd_timer_select tselect; | |
1da177e4 | 1514 | char str[32]; |
c1935b4d | 1515 | int err = 0; |
6b172a85 | 1516 | |
1da177e4 | 1517 | tu = file->private_data; |
1a60d4c5 | 1518 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1519 | if (tu->timeri) { |
1da177e4 | 1520 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1521 | tu->timeri = NULL; |
1522 | } | |
1523 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1524 | err = -EFAULT; | |
1525 | goto __err; | |
1526 | } | |
1da177e4 LT |
1527 | sprintf(str, "application %i", current->pid); |
1528 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1529 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1530 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1531 | if (err < 0) | |
c1935b4d | 1532 | goto __err; |
1da177e4 | 1533 | |
4d572776 JJ |
1534 | kfree(tu->queue); |
1535 | tu->queue = NULL; | |
1536 | kfree(tu->tqueue); | |
1537 | tu->tqueue = NULL; | |
1da177e4 | 1538 | if (tu->tread) { |
53d2f744 | 1539 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
6b172a85 | 1540 | GFP_KERNEL); |
c1935b4d JK |
1541 | if (tu->tqueue == NULL) |
1542 | err = -ENOMEM; | |
1da177e4 | 1543 | } else { |
53d2f744 | 1544 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
6b172a85 | 1545 | GFP_KERNEL); |
c1935b4d JK |
1546 | if (tu->queue == NULL) |
1547 | err = -ENOMEM; | |
1da177e4 | 1548 | } |
6b172a85 | 1549 | |
c1935b4d JK |
1550 | if (err < 0) { |
1551 | snd_timer_close(tu->timeri); | |
1552 | tu->timeri = NULL; | |
1553 | } else { | |
1554 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; | |
6b172a85 CL |
1555 | tu->timeri->callback = tu->tread |
1556 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; | |
c1935b4d JK |
1557 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1558 | tu->timeri->callback_data = (void *)tu; | |
1559 | } | |
1560 | ||
1561 | __err: | |
1a60d4c5 | 1562 | mutex_unlock(&tu->tread_sem); |
c1935b4d | 1563 | return err; |
1da177e4 LT |
1564 | } |
1565 | ||
6b172a85 | 1566 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1567 | struct snd_timer_info __user *_info) |
1da177e4 | 1568 | { |
53d2f744 TI |
1569 | struct snd_timer_user *tu; |
1570 | struct snd_timer_info *info; | |
1571 | struct snd_timer *t; | |
1da177e4 LT |
1572 | int err = 0; |
1573 | ||
1574 | tu = file->private_data; | |
7c64ec34 CL |
1575 | if (!tu->timeri) |
1576 | return -EBADFD; | |
1da177e4 | 1577 | t = tu->timeri->timer; |
7c64ec34 CL |
1578 | if (!t) |
1579 | return -EBADFD; | |
1da177e4 | 1580 | |
ca2c0966 | 1581 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1582 | if (! info) |
1583 | return -ENOMEM; | |
1584 | info->card = t->card ? t->card->number : -1; | |
1585 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1586 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1587 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1588 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1589 | info->resolution = t->hw.resolution; | |
1590 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1591 | err = -EFAULT; | |
1592 | kfree(info); | |
1593 | return err; | |
1594 | } | |
1595 | ||
6b172a85 | 1596 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1597 | struct snd_timer_params __user *_params) |
1da177e4 | 1598 | { |
53d2f744 TI |
1599 | struct snd_timer_user *tu; |
1600 | struct snd_timer_params params; | |
1601 | struct snd_timer *t; | |
1602 | struct snd_timer_read *tr; | |
1603 | struct snd_timer_tread *ttr; | |
1da177e4 | 1604 | int err; |
6b172a85 | 1605 | |
1da177e4 | 1606 | tu = file->private_data; |
7c64ec34 CL |
1607 | if (!tu->timeri) |
1608 | return -EBADFD; | |
1da177e4 | 1609 | t = tu->timeri->timer; |
7c64ec34 CL |
1610 | if (!t) |
1611 | return -EBADFD; | |
1da177e4 LT |
1612 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1613 | return -EFAULT; | |
1614 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { | |
1615 | err = -EINVAL; | |
1616 | goto _end; | |
1617 | } | |
6b172a85 CL |
1618 | if (params.queue_size > 0 && |
1619 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1620 | err = -EINVAL; |
1621 | goto _end; | |
1622 | } | |
1623 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1624 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1625 | (1<<SNDRV_TIMER_EVENT_START)| | |
1626 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1627 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1628 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1629 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1630 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1631 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1632 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1633 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1634 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1635 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1636 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1637 | err = -EINVAL; |
1638 | goto _end; | |
1639 | } | |
1640 | snd_timer_stop(tu->timeri); | |
1641 | spin_lock_irq(&t->lock); | |
1642 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1643 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1644 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1645 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1646 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1647 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1648 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1649 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1650 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1651 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1652 | if (params.queue_size > 0 && |
1653 | (unsigned int)tu->queue_size != params.queue_size) { | |
1da177e4 | 1654 | if (tu->tread) { |
6b172a85 CL |
1655 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
1656 | GFP_KERNEL); | |
1da177e4 LT |
1657 | if (ttr) { |
1658 | kfree(tu->tqueue); | |
1659 | tu->queue_size = params.queue_size; | |
1660 | tu->tqueue = ttr; | |
1661 | } | |
1662 | } else { | |
6b172a85 CL |
1663 | tr = kmalloc(params.queue_size * sizeof(*tr), |
1664 | GFP_KERNEL); | |
1da177e4 LT |
1665 | if (tr) { |
1666 | kfree(tu->queue); | |
1667 | tu->queue_size = params.queue_size; | |
1668 | tu->queue = tr; | |
1669 | } | |
1670 | } | |
1671 | } | |
1672 | tu->qhead = tu->qtail = tu->qused = 0; | |
1673 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1674 | if (tu->tread) { | |
53d2f744 | 1675 | struct snd_timer_tread tread; |
1da177e4 LT |
1676 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1677 | tread.tstamp.tv_sec = 0; | |
1678 | tread.tstamp.tv_nsec = 0; | |
1679 | tread.val = 0; | |
1680 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1681 | } else { | |
53d2f744 | 1682 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1683 | r->resolution = 0; |
1684 | r->ticks = 0; | |
1685 | tu->qused++; | |
1686 | tu->qtail++; | |
1687 | } | |
1da177e4 LT |
1688 | } |
1689 | tu->filter = params.filter; | |
1690 | tu->ticks = params.ticks; | |
1691 | err = 0; | |
1692 | _end: | |
1693 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1694 | return -EFAULT; | |
1695 | return err; | |
1696 | } | |
1697 | ||
6b172a85 | 1698 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1699 | struct snd_timer_status __user *_status) |
1da177e4 | 1700 | { |
53d2f744 TI |
1701 | struct snd_timer_user *tu; |
1702 | struct snd_timer_status status; | |
6b172a85 | 1703 | |
1da177e4 | 1704 | tu = file->private_data; |
7c64ec34 CL |
1705 | if (!tu->timeri) |
1706 | return -EBADFD; | |
1da177e4 LT |
1707 | memset(&status, 0, sizeof(status)); |
1708 | status.tstamp = tu->tstamp; | |
1709 | status.resolution = snd_timer_resolution(tu->timeri); | |
1710 | status.lost = tu->timeri->lost; | |
1711 | status.overrun = tu->overrun; | |
1712 | spin_lock_irq(&tu->qlock); | |
1713 | status.queue = tu->qused; | |
1714 | spin_unlock_irq(&tu->qlock); | |
1715 | if (copy_to_user(_status, &status, sizeof(status))) | |
1716 | return -EFAULT; | |
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | static int snd_timer_user_start(struct file *file) | |
1721 | { | |
1722 | int err; | |
53d2f744 | 1723 | struct snd_timer_user *tu; |
6b172a85 | 1724 | |
1da177e4 | 1725 | tu = file->private_data; |
7c64ec34 CL |
1726 | if (!tu->timeri) |
1727 | return -EBADFD; | |
1da177e4 LT |
1728 | snd_timer_stop(tu->timeri); |
1729 | tu->timeri->lost = 0; | |
1730 | tu->last_resolution = 0; | |
1731 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; | |
1732 | } | |
1733 | ||
1734 | static int snd_timer_user_stop(struct file *file) | |
1735 | { | |
1736 | int err; | |
53d2f744 | 1737 | struct snd_timer_user *tu; |
6b172a85 | 1738 | |
1da177e4 | 1739 | tu = file->private_data; |
7c64ec34 CL |
1740 | if (!tu->timeri) |
1741 | return -EBADFD; | |
1da177e4 LT |
1742 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
1743 | } | |
1744 | ||
1745 | static int snd_timer_user_continue(struct file *file) | |
1746 | { | |
1747 | int err; | |
53d2f744 | 1748 | struct snd_timer_user *tu; |
6b172a85 | 1749 | |
1da177e4 | 1750 | tu = file->private_data; |
7c64ec34 CL |
1751 | if (!tu->timeri) |
1752 | return -EBADFD; | |
1da177e4 LT |
1753 | tu->timeri->lost = 0; |
1754 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; | |
1755 | } | |
1756 | ||
15790a6b TI |
1757 | static int snd_timer_user_pause(struct file *file) |
1758 | { | |
1759 | int err; | |
53d2f744 | 1760 | struct snd_timer_user *tu; |
6b172a85 | 1761 | |
15790a6b | 1762 | tu = file->private_data; |
7c64ec34 CL |
1763 | if (!tu->timeri) |
1764 | return -EBADFD; | |
d138b445 | 1765 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
15790a6b TI |
1766 | } |
1767 | ||
8c50b37c TI |
1768 | enum { |
1769 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1770 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1771 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1772 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1773 | }; | |
1774 | ||
6b172a85 CL |
1775 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
1776 | unsigned long arg) | |
1da177e4 | 1777 | { |
53d2f744 | 1778 | struct snd_timer_user *tu; |
1da177e4 LT |
1779 | void __user *argp = (void __user *)arg; |
1780 | int __user *p = argp; | |
6b172a85 | 1781 | |
1da177e4 LT |
1782 | tu = file->private_data; |
1783 | switch (cmd) { | |
1784 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1785 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1786 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1787 | return snd_timer_user_next_device(argp); | |
1788 | case SNDRV_TIMER_IOCTL_TREAD: | |
1789 | { | |
1790 | int xarg; | |
6b172a85 | 1791 | |
1a60d4c5 | 1792 | mutex_lock(&tu->tread_sem); |
c1935b4d | 1793 | if (tu->timeri) { /* too late */ |
1a60d4c5 | 1794 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1795 | return -EBUSY; |
c1935b4d JK |
1796 | } |
1797 | if (get_user(xarg, p)) { | |
1a60d4c5 | 1798 | mutex_unlock(&tu->tread_sem); |
1da177e4 | 1799 | return -EFAULT; |
c1935b4d | 1800 | } |
1da177e4 | 1801 | tu->tread = xarg ? 1 : 0; |
1a60d4c5 | 1802 | mutex_unlock(&tu->tread_sem); |
1da177e4 LT |
1803 | return 0; |
1804 | } | |
1805 | case SNDRV_TIMER_IOCTL_GINFO: | |
1806 | return snd_timer_user_ginfo(file, argp); | |
1807 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1808 | return snd_timer_user_gparams(file, argp); | |
1809 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
1810 | return snd_timer_user_gstatus(file, argp); | |
1811 | case SNDRV_TIMER_IOCTL_SELECT: | |
1812 | return snd_timer_user_tselect(file, argp); | |
1813 | case SNDRV_TIMER_IOCTL_INFO: | |
1814 | return snd_timer_user_info(file, argp); | |
1815 | case SNDRV_TIMER_IOCTL_PARAMS: | |
1816 | return snd_timer_user_params(file, argp); | |
1817 | case SNDRV_TIMER_IOCTL_STATUS: | |
1818 | return snd_timer_user_status(file, argp); | |
1819 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 1820 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
1821 | return snd_timer_user_start(file); |
1822 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 1823 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
1824 | return snd_timer_user_stop(file); |
1825 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 1826 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 1827 | return snd_timer_user_continue(file); |
15790a6b | 1828 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 1829 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 1830 | return snd_timer_user_pause(file); |
1da177e4 LT |
1831 | } |
1832 | return -ENOTTY; | |
1833 | } | |
1834 | ||
1835 | static int snd_timer_user_fasync(int fd, struct file * file, int on) | |
1836 | { | |
53d2f744 | 1837 | struct snd_timer_user *tu; |
6b172a85 | 1838 | |
1da177e4 | 1839 | tu = file->private_data; |
60aa4924 | 1840 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
1841 | } |
1842 | ||
6b172a85 CL |
1843 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
1844 | size_t count, loff_t *offset) | |
1da177e4 | 1845 | { |
53d2f744 | 1846 | struct snd_timer_user *tu; |
1da177e4 LT |
1847 | long result = 0, unit; |
1848 | int err = 0; | |
6b172a85 | 1849 | |
1da177e4 | 1850 | tu = file->private_data; |
53d2f744 | 1851 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
1da177e4 LT |
1852 | spin_lock_irq(&tu->qlock); |
1853 | while ((long)count - result >= unit) { | |
1854 | while (!tu->qused) { | |
1855 | wait_queue_t wait; | |
1856 | ||
1857 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1858 | err = -EAGAIN; | |
1859 | break; | |
1860 | } | |
1861 | ||
1862 | set_current_state(TASK_INTERRUPTIBLE); | |
1863 | init_waitqueue_entry(&wait, current); | |
1864 | add_wait_queue(&tu->qchange_sleep, &wait); | |
1865 | ||
1866 | spin_unlock_irq(&tu->qlock); | |
1867 | schedule(); | |
1868 | spin_lock_irq(&tu->qlock); | |
1869 | ||
1870 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
1871 | ||
1872 | if (signal_pending(current)) { | |
1873 | err = -ERESTARTSYS; | |
1874 | break; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | spin_unlock_irq(&tu->qlock); | |
1879 | if (err < 0) | |
1880 | goto _error; | |
1881 | ||
1882 | if (tu->tread) { | |
6b172a85 | 1883 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
53d2f744 | 1884 | sizeof(struct snd_timer_tread))) { |
1da177e4 LT |
1885 | err = -EFAULT; |
1886 | goto _error; | |
1887 | } | |
1888 | } else { | |
6b172a85 | 1889 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
53d2f744 | 1890 | sizeof(struct snd_timer_read))) { |
1da177e4 LT |
1891 | err = -EFAULT; |
1892 | goto _error; | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | tu->qhead %= tu->queue_size; | |
1897 | ||
1898 | result += unit; | |
1899 | buffer += unit; | |
1900 | ||
1901 | spin_lock_irq(&tu->qlock); | |
1902 | tu->qused--; | |
1903 | } | |
1904 | spin_unlock_irq(&tu->qlock); | |
1905 | _error: | |
1906 | return result > 0 ? result : err; | |
1907 | } | |
1908 | ||
1909 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) | |
1910 | { | |
1911 | unsigned int mask; | |
53d2f744 | 1912 | struct snd_timer_user *tu; |
1da177e4 LT |
1913 | |
1914 | tu = file->private_data; | |
1915 | ||
1916 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 1917 | |
1da177e4 LT |
1918 | mask = 0; |
1919 | if (tu->qused) | |
1920 | mask |= POLLIN | POLLRDNORM; | |
1921 | ||
1922 | return mask; | |
1923 | } | |
1924 | ||
1925 | #ifdef CONFIG_COMPAT | |
1926 | #include "timer_compat.c" | |
1927 | #else | |
1928 | #define snd_timer_user_ioctl_compat NULL | |
1929 | #endif | |
1930 | ||
9c2e08c5 | 1931 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
1932 | { |
1933 | .owner = THIS_MODULE, | |
1934 | .read = snd_timer_user_read, | |
1935 | .open = snd_timer_user_open, | |
1936 | .release = snd_timer_user_release, | |
02f4865f | 1937 | .llseek = no_llseek, |
1da177e4 LT |
1938 | .poll = snd_timer_user_poll, |
1939 | .unlocked_ioctl = snd_timer_user_ioctl, | |
1940 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
1941 | .fasync = snd_timer_user_fasync, | |
1942 | }; | |
1943 | ||
1da177e4 LT |
1944 | /* |
1945 | * ENTRY functions | |
1946 | */ | |
1947 | ||
1da177e4 LT |
1948 | static int __init alsa_timer_init(void) |
1949 | { | |
1950 | int err; | |
1da177e4 LT |
1951 | |
1952 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS | |
6b172a85 CL |
1953 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
1954 | "system timer"); | |
1da177e4 | 1955 | #endif |
e28563cc | 1956 | |
1da177e4 | 1957 | if ((err = snd_timer_register_system()) < 0) |
6b172a85 CL |
1958 | snd_printk(KERN_ERR "unable to register system timer (%i)\n", |
1959 | err); | |
f87135f5 CL |
1960 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
1961 | &snd_timer_f_ops, NULL, "timer")) < 0) | |
6b172a85 CL |
1962 | snd_printk(KERN_ERR "unable to register timer device (%i)\n", |
1963 | err); | |
e28563cc | 1964 | snd_timer_proc_init(); |
1da177e4 LT |
1965 | return 0; |
1966 | } | |
1967 | ||
1968 | static void __exit alsa_timer_exit(void) | |
1969 | { | |
1970 | struct list_head *p, *n; | |
1971 | ||
1972 | snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); | |
1973 | /* unregister the system timer */ | |
1974 | list_for_each_safe(p, n, &snd_timer_list) { | |
53d2f744 | 1975 | struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); |
c461482c | 1976 | snd_timer_free(timer); |
1da177e4 | 1977 | } |
e28563cc | 1978 | snd_timer_proc_done(); |
1da177e4 LT |
1979 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
1980 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
1981 | #endif | |
1982 | } | |
1983 | ||
1984 | module_init(alsa_timer_init) | |
1985 | module_exit(alsa_timer_exit) | |
1986 | ||
1987 | EXPORT_SYMBOL(snd_timer_open); | |
1988 | EXPORT_SYMBOL(snd_timer_close); | |
1989 | EXPORT_SYMBOL(snd_timer_resolution); | |
1990 | EXPORT_SYMBOL(snd_timer_start); | |
1991 | EXPORT_SYMBOL(snd_timer_stop); | |
1992 | EXPORT_SYMBOL(snd_timer_continue); | |
1993 | EXPORT_SYMBOL(snd_timer_pause); | |
1994 | EXPORT_SYMBOL(snd_timer_new); | |
1995 | EXPORT_SYMBOL(snd_timer_notify); | |
1996 | EXPORT_SYMBOL(snd_timer_global_new); | |
1997 | EXPORT_SYMBOL(snd_timer_global_free); | |
1998 | EXPORT_SYMBOL(snd_timer_global_register); | |
1da177e4 | 1999 | EXPORT_SYMBOL(snd_timer_interrupt); |