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Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Timers abstract layer | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/delay.h> |
8 | #include <linux/init.h> | |
1da177e4 LT |
9 | #include <linux/slab.h> |
10 | #include <linux/time.h> | |
1a60d4c5 | 11 | #include <linux/mutex.h> |
51990e82 | 12 | #include <linux/device.h> |
65a77217 | 13 | #include <linux/module.h> |
543537bd | 14 | #include <linux/string.h> |
174cd4b1 | 15 | #include <linux/sched/signal.h> |
1da177e4 LT |
16 | #include <sound/core.h> |
17 | #include <sound/timer.h> | |
18 | #include <sound/control.h> | |
19 | #include <sound/info.h> | |
20 | #include <sound/minors.h> | |
21 | #include <sound/initval.h> | |
22 | #include <linux/kmod.h> | |
1da177e4 | 23 | |
9f8a7658 TI |
24 | /* internal flags */ |
25 | #define SNDRV_TIMER_IFLG_PAUSED 0x00010000 | |
fe1b26c9 | 26 | #define SNDRV_TIMER_IFLG_DEAD 0x00020000 |
9f8a7658 | 27 | |
8eeaa2f9 | 28 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
109fef9e | 29 | #define DEFAULT_TIMER_LIMIT 4 |
1da177e4 LT |
30 | #else |
31 | #define DEFAULT_TIMER_LIMIT 1 | |
32 | #endif | |
33 | ||
34 | static int timer_limit = DEFAULT_TIMER_LIMIT; | |
b751eef1 | 35 | static int timer_tstamp_monotonic = 1; |
c1017a4c | 36 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
1da177e4 LT |
37 | MODULE_DESCRIPTION("ALSA timer interface"); |
38 | MODULE_LICENSE("GPL"); | |
39 | module_param(timer_limit, int, 0444); | |
40 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); | |
b751eef1 JK |
41 | module_param(timer_tstamp_monotonic, int, 0444); |
42 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); | |
1da177e4 | 43 | |
03cfe6f5 KS |
44 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
45 | MODULE_ALIAS("devname:snd/timer"); | |
46 | ||
53d2f744 TI |
47 | struct snd_timer_user { |
48 | struct snd_timer_instance *timeri; | |
6b172a85 | 49 | int tread; /* enhanced read with timestamps and events */ |
1da177e4 LT |
50 | unsigned long ticks; |
51 | unsigned long overrun; | |
52 | int qhead; | |
53 | int qtail; | |
54 | int qused; | |
55 | int queue_size; | |
230323da | 56 | bool disconnected; |
53d2f744 TI |
57 | struct snd_timer_read *queue; |
58 | struct snd_timer_tread *tqueue; | |
1da177e4 LT |
59 | spinlock_t qlock; |
60 | unsigned long last_resolution; | |
61 | unsigned int filter; | |
62 | struct timespec tstamp; /* trigger tstamp */ | |
63 | wait_queue_head_t qchange_sleep; | |
64 | struct fasync_struct *fasync; | |
af368027 | 65 | struct mutex ioctl_lock; |
53d2f744 | 66 | }; |
1da177e4 LT |
67 | |
68 | /* list of timers */ | |
69 | static LIST_HEAD(snd_timer_list); | |
70 | ||
71 | /* list of slave instances */ | |
72 | static LIST_HEAD(snd_timer_slave_list); | |
73 | ||
74 | /* lock for slave active lists */ | |
75 | static DEFINE_SPINLOCK(slave_active_lock); | |
76 | ||
1a60d4c5 | 77 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 78 | |
53d2f744 TI |
79 | static int snd_timer_free(struct snd_timer *timer); |
80 | static int snd_timer_dev_free(struct snd_device *device); | |
81 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 82 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 83 | |
53d2f744 | 84 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
85 | |
86 | /* | |
87 | * create a timer instance with the given owner string. | |
88 | * when timer is not NULL, increments the module counter | |
89 | */ | |
53d2f744 TI |
90 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
91 | struct snd_timer *timer) | |
1da177e4 | 92 | { |
53d2f744 | 93 | struct snd_timer_instance *timeri; |
ca2c0966 | 94 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
95 | if (timeri == NULL) |
96 | return NULL; | |
543537bd | 97 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
98 | if (! timeri->owner) { |
99 | kfree(timeri); | |
100 | return NULL; | |
101 | } | |
102 | INIT_LIST_HEAD(&timeri->open_list); | |
103 | INIT_LIST_HEAD(&timeri->active_list); | |
104 | INIT_LIST_HEAD(&timeri->ack_list); | |
105 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
106 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
107 | ||
108 | timeri->timer = timer; | |
de24214d | 109 | if (timer && !try_module_get(timer->module)) { |
1da177e4 LT |
110 | kfree(timeri->owner); |
111 | kfree(timeri); | |
112 | return NULL; | |
113 | } | |
114 | ||
115 | return timeri; | |
116 | } | |
117 | ||
118 | /* | |
119 | * find a timer instance from the given timer id | |
120 | */ | |
53d2f744 | 121 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 122 | { |
53d2f744 | 123 | struct snd_timer *timer = NULL; |
1da177e4 | 124 | |
9244b2c3 | 125 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
126 | if (timer->tmr_class != tid->dev_class) |
127 | continue; | |
128 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
129 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
130 | (timer->card == NULL || | |
131 | timer->card->number != tid->card)) | |
132 | continue; | |
133 | if (timer->tmr_device != tid->device) | |
134 | continue; | |
135 | if (timer->tmr_subdevice != tid->subdevice) | |
136 | continue; | |
137 | return timer; | |
138 | } | |
139 | return NULL; | |
140 | } | |
141 | ||
ee2da997 | 142 | #ifdef CONFIG_MODULES |
1da177e4 | 143 | |
53d2f744 | 144 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 145 | { |
1da177e4 LT |
146 | switch (tid->dev_class) { |
147 | case SNDRV_TIMER_CLASS_GLOBAL: | |
148 | if (tid->device < timer_limit) | |
149 | request_module("snd-timer-%i", tid->device); | |
150 | break; | |
151 | case SNDRV_TIMER_CLASS_CARD: | |
152 | case SNDRV_TIMER_CLASS_PCM: | |
153 | if (tid->card < snd_ecards_limit) | |
154 | request_module("snd-card-%i", tid->card); | |
155 | break; | |
156 | default: | |
157 | break; | |
158 | } | |
159 | } | |
160 | ||
161 | #endif | |
162 | ||
163 | /* | |
164 | * look for a master instance matching with the slave id of the given slave. | |
165 | * when found, relink the open_link of the slave. | |
166 | * | |
167 | * call this with register_mutex down. | |
168 | */ | |
9b7d869e | 169 | static int snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 170 | { |
53d2f744 TI |
171 | struct snd_timer *timer; |
172 | struct snd_timer_instance *master; | |
1da177e4 LT |
173 | |
174 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
175 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
176 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
1da177e4 LT |
177 | if (slave->slave_class == master->slave_class && |
178 | slave->slave_id == master->slave_id) { | |
9b7d869e TI |
179 | if (master->timer->num_instances >= |
180 | master->timer->max_instances) | |
181 | return -EBUSY; | |
5b7c757d NK |
182 | list_move_tail(&slave->open_list, |
183 | &master->slave_list_head); | |
9b7d869e | 184 | master->timer->num_instances++; |
1da177e4 LT |
185 | spin_lock_irq(&slave_active_lock); |
186 | slave->master = master; | |
187 | slave->timer = master->timer; | |
188 | spin_unlock_irq(&slave_active_lock); | |
9b7d869e | 189 | return 0; |
1da177e4 LT |
190 | } |
191 | } | |
192 | } | |
9b7d869e | 193 | return 0; |
1da177e4 LT |
194 | } |
195 | ||
196 | /* | |
197 | * look for slave instances matching with the slave id of the given master. | |
198 | * when found, relink the open_link of slaves. | |
199 | * | |
200 | * call this with register_mutex down. | |
201 | */ | |
9b7d869e | 202 | static int snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 203 | { |
9244b2c3 | 204 | struct snd_timer_instance *slave, *tmp; |
1da177e4 LT |
205 | |
206 | /* check all pending slaves */ | |
9244b2c3 | 207 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
1da177e4 LT |
208 | if (slave->slave_class == master->slave_class && |
209 | slave->slave_id == master->slave_id) { | |
9b7d869e TI |
210 | if (master->timer->num_instances >= |
211 | master->timer->max_instances) | |
212 | return -EBUSY; | |
9244b2c3 | 213 | list_move_tail(&slave->open_list, &master->slave_list_head); |
9b7d869e | 214 | master->timer->num_instances++; |
1da177e4 | 215 | spin_lock_irq(&slave_active_lock); |
b5a663aa | 216 | spin_lock(&master->timer->lock); |
1da177e4 LT |
217 | slave->master = master; |
218 | slave->timer = master->timer; | |
219 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
6b172a85 CL |
220 | list_add_tail(&slave->active_list, |
221 | &master->slave_active_head); | |
b5a663aa | 222 | spin_unlock(&master->timer->lock); |
1da177e4 LT |
223 | spin_unlock_irq(&slave_active_lock); |
224 | } | |
225 | } | |
9b7d869e | 226 | return 0; |
1da177e4 LT |
227 | } |
228 | ||
424ef308 TI |
229 | static int snd_timer_close_locked(struct snd_timer_instance *timeri, |
230 | struct device **card_devp_to_put); | |
9b7d869e | 231 | |
1da177e4 LT |
232 | /* |
233 | * open a timer instance | |
234 | * when opening a master, the slave id must be here given. | |
235 | */ | |
53d2f744 TI |
236 | int snd_timer_open(struct snd_timer_instance **ti, |
237 | char *owner, struct snd_timer_id *tid, | |
1da177e4 LT |
238 | unsigned int slave_id) |
239 | { | |
53d2f744 TI |
240 | struct snd_timer *timer; |
241 | struct snd_timer_instance *timeri = NULL; | |
424ef308 | 242 | struct device *card_dev_to_put = NULL; |
9b7d869e | 243 | int err; |
6b172a85 | 244 | |
41672c0c | 245 | mutex_lock(®ister_mutex); |
1da177e4 LT |
246 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
247 | /* open a slave instance */ | |
248 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
249 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
250 | pr_debug("ALSA: timer: invalid slave class %i\n", |
251 | tid->dev_sclass); | |
41672c0c TI |
252 | err = -EINVAL; |
253 | goto unlock; | |
1da177e4 | 254 | } |
1da177e4 | 255 | timeri = snd_timer_instance_new(owner, NULL); |
2fd43d11 | 256 | if (!timeri) { |
41672c0c TI |
257 | err = -ENOMEM; |
258 | goto unlock; | |
2fd43d11 | 259 | } |
1da177e4 LT |
260 | timeri->slave_class = tid->dev_sclass; |
261 | timeri->slave_id = tid->device; | |
262 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
263 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
9b7d869e TI |
264 | err = snd_timer_check_slave(timeri); |
265 | if (err < 0) { | |
424ef308 | 266 | snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e TI |
267 | timeri = NULL; |
268 | } | |
41672c0c | 269 | goto unlock; |
1da177e4 LT |
270 | } |
271 | ||
272 | /* open a master instance */ | |
1da177e4 | 273 | timer = snd_timer_find(tid); |
ee2da997 JB |
274 | #ifdef CONFIG_MODULES |
275 | if (!timer) { | |
1a60d4c5 | 276 | mutex_unlock(®ister_mutex); |
1da177e4 | 277 | snd_timer_request(tid); |
1a60d4c5 | 278 | mutex_lock(®ister_mutex); |
1da177e4 LT |
279 | timer = snd_timer_find(tid); |
280 | } | |
281 | #endif | |
2fd43d11 | 282 | if (!timer) { |
41672c0c TI |
283 | err = -ENODEV; |
284 | goto unlock; | |
1da177e4 | 285 | } |
2fd43d11 | 286 | if (!list_empty(&timer->open_list_head)) { |
a03ae53d TI |
287 | struct snd_timer_instance *t = |
288 | list_entry(timer->open_list_head.next, | |
53d2f744 | 289 | struct snd_timer_instance, open_list); |
a03ae53d | 290 | if (t->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
41672c0c | 291 | err = -EBUSY; |
41672c0c | 292 | goto unlock; |
2fd43d11 CL |
293 | } |
294 | } | |
9b7d869e | 295 | if (timer->num_instances >= timer->max_instances) { |
41672c0c TI |
296 | err = -EBUSY; |
297 | goto unlock; | |
9b7d869e | 298 | } |
2fd43d11 CL |
299 | timeri = snd_timer_instance_new(owner, timer); |
300 | if (!timeri) { | |
41672c0c TI |
301 | err = -ENOMEM; |
302 | goto unlock; | |
2fd43d11 | 303 | } |
230323da TI |
304 | /* take a card refcount for safe disconnection */ |
305 | if (timer->card) | |
306 | get_device(&timer->card->card_dev); | |
2fd43d11 CL |
307 | timeri->slave_class = tid->dev_sclass; |
308 | timeri->slave_id = slave_id; | |
8ddc0563 VN |
309 | |
310 | if (list_empty(&timer->open_list_head) && timer->hw.open) { | |
41672c0c | 311 | err = timer->hw.open(timer); |
8ddc0563 VN |
312 | if (err) { |
313 | kfree(timeri->owner); | |
314 | kfree(timeri); | |
41672c0c | 315 | timeri = NULL; |
8ddc0563 VN |
316 | |
317 | if (timer->card) | |
424ef308 | 318 | card_dev_to_put = &timer->card->card_dev; |
8ddc0563 | 319 | module_put(timer->module); |
41672c0c | 320 | goto unlock; |
8ddc0563 VN |
321 | } |
322 | } | |
323 | ||
2fd43d11 | 324 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
9b7d869e TI |
325 | timer->num_instances++; |
326 | err = snd_timer_check_master(timeri); | |
327 | if (err < 0) { | |
424ef308 | 328 | snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e TI |
329 | timeri = NULL; |
330 | } | |
41672c0c TI |
331 | |
332 | unlock: | |
1a60d4c5 | 333 | mutex_unlock(®ister_mutex); |
424ef308 TI |
334 | /* put_device() is called after unlock for avoiding deadlock */ |
335 | if (card_dev_to_put) | |
336 | put_device(card_dev_to_put); | |
1da177e4 | 337 | *ti = timeri; |
9b7d869e | 338 | return err; |
1da177e4 | 339 | } |
98856392 | 340 | EXPORT_SYMBOL(snd_timer_open); |
1da177e4 | 341 | |
1da177e4 LT |
342 | /* |
343 | * close a timer instance | |
9b7d869e | 344 | * call this with register_mutex down. |
1da177e4 | 345 | */ |
424ef308 TI |
346 | static int snd_timer_close_locked(struct snd_timer_instance *timeri, |
347 | struct device **card_devp_to_put) | |
1da177e4 | 348 | { |
fe1b26c9 | 349 | struct snd_timer *timer = timeri->timer; |
9244b2c3 | 350 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 351 | |
fe1b26c9 TI |
352 | if (timer) { |
353 | spin_lock_irq(&timer->lock); | |
354 | timeri->flags |= SNDRV_TIMER_IFLG_DEAD; | |
355 | spin_unlock_irq(&timer->lock); | |
356 | } | |
357 | ||
9984d1b5 TI |
358 | list_del(&timeri->open_list); |
359 | ||
1da177e4 LT |
360 | /* force to stop the timer */ |
361 | snd_timer_stop(timeri); | |
362 | ||
9984d1b5 | 363 | if (timer) { |
9b7d869e | 364 | timer->num_instances--; |
1da177e4 LT |
365 | /* wait, until the active callback is finished */ |
366 | spin_lock_irq(&timer->lock); | |
367 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
368 | spin_unlock_irq(&timer->lock); | |
369 | udelay(10); | |
370 | spin_lock_irq(&timer->lock); | |
371 | } | |
372 | spin_unlock_irq(&timer->lock); | |
9984d1b5 | 373 | |
1da177e4 | 374 | /* remove slave links */ |
b5a663aa TI |
375 | spin_lock_irq(&slave_active_lock); |
376 | spin_lock(&timer->lock); | |
9244b2c3 JB |
377 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
378 | open_list) { | |
9244b2c3 | 379 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
9b7d869e | 380 | timer->num_instances--; |
1da177e4 LT |
381 | slave->master = NULL; |
382 | slave->timer = NULL; | |
b5a663aa TI |
383 | list_del_init(&slave->ack_list); |
384 | list_del_init(&slave->active_list); | |
1da177e4 | 385 | } |
b5a663aa TI |
386 | spin_unlock(&timer->lock); |
387 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
388 | |
389 | /* slave doesn't need to release timer resources below */ | |
390 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
391 | timer = NULL; | |
1da177e4 | 392 | } |
9984d1b5 | 393 | |
1da177e4 LT |
394 | if (timeri->private_free) |
395 | timeri->private_free(timeri); | |
396 | kfree(timeri->owner); | |
397 | kfree(timeri); | |
9984d1b5 TI |
398 | |
399 | if (timer) { | |
400 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
401 | timer->hw.close(timer); | |
402 | /* release a card refcount for safe disconnection */ | |
403 | if (timer->card) | |
424ef308 | 404 | *card_devp_to_put = &timer->card->card_dev; |
de24214d | 405 | module_put(timer->module); |
9984d1b5 TI |
406 | } |
407 | ||
1da177e4 LT |
408 | return 0; |
409 | } | |
9b7d869e TI |
410 | |
411 | /* | |
412 | * close a timer instance | |
413 | */ | |
414 | int snd_timer_close(struct snd_timer_instance *timeri) | |
415 | { | |
424ef308 | 416 | struct device *card_dev_to_put = NULL; |
9b7d869e TI |
417 | int err; |
418 | ||
419 | if (snd_BUG_ON(!timeri)) | |
420 | return -ENXIO; | |
421 | ||
422 | mutex_lock(®ister_mutex); | |
424ef308 | 423 | err = snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e | 424 | mutex_unlock(®ister_mutex); |
424ef308 TI |
425 | /* put_device() is called after unlock for avoiding deadlock */ |
426 | if (card_dev_to_put) | |
427 | put_device(card_dev_to_put); | |
9b7d869e TI |
428 | return err; |
429 | } | |
98856392 | 430 | EXPORT_SYMBOL(snd_timer_close); |
1da177e4 | 431 | |
fdcb5761 TI |
432 | static unsigned long snd_timer_hw_resolution(struct snd_timer *timer) |
433 | { | |
434 | if (timer->hw.c_resolution) | |
435 | return timer->hw.c_resolution(timer); | |
436 | else | |
437 | return timer->hw.resolution; | |
438 | } | |
439 | ||
53d2f744 | 440 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 441 | { |
53d2f744 | 442 | struct snd_timer * timer; |
9d4d207d TI |
443 | unsigned long ret = 0; |
444 | unsigned long flags; | |
1da177e4 LT |
445 | |
446 | if (timeri == NULL) | |
447 | return 0; | |
dd1f7ab8 | 448 | timer = timeri->timer; |
9d4d207d TI |
449 | if (timer) { |
450 | spin_lock_irqsave(&timer->lock, flags); | |
451 | ret = snd_timer_hw_resolution(timer); | |
452 | spin_unlock_irqrestore(&timer->lock, flags); | |
453 | } | |
454 | return ret; | |
1da177e4 | 455 | } |
98856392 | 456 | EXPORT_SYMBOL(snd_timer_resolution); |
1da177e4 | 457 | |
53d2f744 | 458 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 459 | { |
9d4d207d | 460 | struct snd_timer *timer = ti->timer; |
1da177e4 | 461 | unsigned long resolution = 0; |
53d2f744 | 462 | struct snd_timer_instance *ts; |
1da177e4 LT |
463 | struct timespec tstamp; |
464 | ||
b751eef1 | 465 | if (timer_tstamp_monotonic) |
26204e04 | 466 | ktime_get_ts(&tstamp); |
b751eef1 JK |
467 | else |
468 | getnstimeofday(&tstamp); | |
7eaa943c TI |
469 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
470 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
471 | return; | |
9d4d207d TI |
472 | if (timer && |
473 | (event == SNDRV_TIMER_EVENT_START || | |
474 | event == SNDRV_TIMER_EVENT_CONTINUE)) | |
475 | resolution = snd_timer_hw_resolution(timer); | |
1da177e4 | 476 | if (ti->ccallback) |
b30477d5 | 477 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
478 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
479 | return; | |
1da177e4 LT |
480 | if (timer == NULL) |
481 | return; | |
482 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
483 | return; | |
9244b2c3 | 484 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 485 | if (ts->ccallback) |
117159f0 | 486 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
487 | } |
488 | ||
f65e0d29 TI |
489 | /* start/continue a master timer */ |
490 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
491 | bool start, unsigned long ticks) | |
1da177e4 | 492 | { |
f65e0d29 TI |
493 | struct snd_timer *timer; |
494 | int result; | |
495 | unsigned long flags; | |
496 | ||
497 | timer = timeri->timer; | |
498 | if (!timer) | |
499 | return -EINVAL; | |
500 | ||
501 | spin_lock_irqsave(&timer->lock, flags); | |
fe1b26c9 TI |
502 | if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { |
503 | result = -EINVAL; | |
504 | goto unlock; | |
505 | } | |
f65e0d29 TI |
506 | if (timer->card && timer->card->shutdown) { |
507 | result = -ENODEV; | |
508 | goto unlock; | |
509 | } | |
510 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
511 | SNDRV_TIMER_IFLG_START)) { | |
512 | result = -EBUSY; | |
513 | goto unlock; | |
514 | } | |
515 | ||
516 | if (start) | |
517 | timeri->ticks = timeri->cticks = ticks; | |
518 | else if (!timeri->cticks) | |
519 | timeri->cticks = 1; | |
520 | timeri->pticks = 0; | |
521 | ||
5b7c757d | 522 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
523 | if (timer->running) { |
524 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
525 | goto __start_now; | |
526 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
527 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 528 | result = 1; /* delayed start */ |
1da177e4 | 529 | } else { |
f65e0d29 TI |
530 | if (start) |
531 | timer->sticks = ticks; | |
1da177e4 LT |
532 | timer->hw.start(timer); |
533 | __start_now: | |
534 | timer->running++; | |
535 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 536 | result = 0; |
1da177e4 | 537 | } |
f65e0d29 TI |
538 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
539 | SNDRV_TIMER_EVENT_CONTINUE); | |
540 | unlock: | |
541 | spin_unlock_irqrestore(&timer->lock, flags); | |
542 | return result; | |
1da177e4 LT |
543 | } |
544 | ||
f65e0d29 TI |
545 | /* start/continue a slave timer */ |
546 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
547 | bool start) | |
1da177e4 LT |
548 | { |
549 | unsigned long flags; | |
fe1b26c9 | 550 | int err; |
1da177e4 LT |
551 | |
552 | spin_lock_irqsave(&slave_active_lock, flags); | |
fe1b26c9 TI |
553 | if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { |
554 | err = -EINVAL; | |
555 | goto unlock; | |
556 | } | |
f784beb7 | 557 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
fe1b26c9 TI |
558 | err = -EBUSY; |
559 | goto unlock; | |
f784beb7 | 560 | } |
1da177e4 | 561 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
562 | if (timeri->master && timeri->timer) { |
563 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
564 | list_add_tail(&timeri->active_list, |
565 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
566 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
567 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
568 | spin_unlock(&timeri->timer->lock); |
569 | } | |
fe1b26c9 TI |
570 | err = 1; /* delayed start */ |
571 | unlock: | |
1da177e4 | 572 | spin_unlock_irqrestore(&slave_active_lock, flags); |
fe1b26c9 | 573 | return err; |
1da177e4 LT |
574 | } |
575 | ||
f65e0d29 TI |
576 | /* stop/pause a master timer */ |
577 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 578 | { |
53d2f744 | 579 | struct snd_timer *timer; |
f65e0d29 | 580 | int result = 0; |
1da177e4 LT |
581 | unsigned long flags; |
582 | ||
1da177e4 LT |
583 | timer = timeri->timer; |
584 | if (!timer) | |
585 | return -EINVAL; | |
586 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
587 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
588 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
589 | result = -EBUSY; |
590 | goto unlock; | |
f784beb7 | 591 | } |
1da177e4 LT |
592 | list_del_init(&timeri->ack_list); |
593 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
594 | if (timer->card && timer->card->shutdown) |
595 | goto unlock; | |
596 | if (stop) { | |
597 | timeri->cticks = timeri->ticks; | |
598 | timeri->pticks = 0; | |
230323da | 599 | } |
1da177e4 LT |
600 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
601 | !(--timer->running)) { | |
602 | timer->hw.stop(timer); | |
603 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
604 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
605 | snd_timer_reschedule(timer, 0); | |
606 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
607 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
608 | timer->hw.start(timer); | |
609 | } | |
610 | } | |
611 | } | |
c3b16813 | 612 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
9f8a7658 TI |
613 | if (stop) |
614 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; | |
615 | else | |
616 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; | |
f65e0d29 | 617 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
3ae18097 | 618 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 | 619 | unlock: |
1da177e4 | 620 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
621 | return result; |
622 | } | |
623 | ||
624 | /* stop/pause a slave timer */ | |
625 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
626 | { | |
627 | unsigned long flags; | |
628 | ||
629 | spin_lock_irqsave(&slave_active_lock, flags); | |
630 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
631 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
632 | return -EBUSY; | |
633 | } | |
634 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
635 | if (timeri->timer) { | |
636 | spin_lock(&timeri->timer->lock); | |
637 | list_del_init(&timeri->ack_list); | |
638 | list_del_init(&timeri->active_list); | |
639 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
3ae18097 | 640 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 TI |
641 | spin_unlock(&timeri->timer->lock); |
642 | } | |
643 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
644 | return 0; |
645 | } | |
646 | ||
f65e0d29 TI |
647 | /* |
648 | * start the timer instance | |
649 | */ | |
650 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
651 | { | |
652 | if (timeri == NULL || ticks < 1) | |
653 | return -EINVAL; | |
654 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
655 | return snd_timer_start_slave(timeri, true); | |
656 | else | |
657 | return snd_timer_start1(timeri, true, ticks); | |
658 | } | |
98856392 | 659 | EXPORT_SYMBOL(snd_timer_start); |
f65e0d29 | 660 | |
1da177e4 LT |
661 | /* |
662 | * stop the timer instance. | |
663 | * | |
664 | * do not call this from the timer callback! | |
665 | */ | |
53d2f744 | 666 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 667 | { |
f65e0d29 TI |
668 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
669 | return snd_timer_stop_slave(timeri, true); | |
670 | else | |
671 | return snd_timer_stop1(timeri, true); | |
1da177e4 | 672 | } |
98856392 | 673 | EXPORT_SYMBOL(snd_timer_stop); |
1da177e4 LT |
674 | |
675 | /* | |
676 | * start again.. the tick is kept. | |
677 | */ | |
53d2f744 | 678 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 679 | { |
9f8a7658 TI |
680 | /* timer can continue only after pause */ |
681 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
682 | return -EINVAL; | |
683 | ||
1da177e4 | 684 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
685 | return snd_timer_start_slave(timeri, false); |
686 | else | |
687 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 | 688 | } |
98856392 | 689 | EXPORT_SYMBOL(snd_timer_continue); |
1da177e4 LT |
690 | |
691 | /* | |
692 | * pause.. remember the ticks left | |
693 | */ | |
53d2f744 | 694 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 695 | { |
f65e0d29 TI |
696 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
697 | return snd_timer_stop_slave(timeri, false); | |
698 | else | |
699 | return snd_timer_stop1(timeri, false); | |
1da177e4 | 700 | } |
98856392 | 701 | EXPORT_SYMBOL(snd_timer_pause); |
1da177e4 LT |
702 | |
703 | /* | |
704 | * reschedule the timer | |
705 | * | |
706 | * start pending instances and check the scheduling ticks. | |
707 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
708 | */ | |
53d2f744 | 709 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 710 | { |
53d2f744 | 711 | struct snd_timer_instance *ti; |
1da177e4 | 712 | unsigned long ticks = ~0UL; |
1da177e4 | 713 | |
9244b2c3 | 714 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
715 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
716 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
717 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
718 | timer->running++; | |
719 | } | |
720 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
721 | if (ticks > ti->cticks) | |
722 | ticks = ti->cticks; | |
723 | } | |
724 | } | |
725 | if (ticks == ~0UL) { | |
726 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
727 | return; | |
728 | } | |
729 | if (ticks > timer->hw.ticks) | |
730 | ticks = timer->hw.ticks; | |
731 | if (ticks_left != ticks) | |
732 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
733 | timer->sticks = ticks; | |
734 | } | |
735 | ||
8748b850 TI |
736 | /* call callbacks in timer ack list */ |
737 | static void snd_timer_process_callbacks(struct snd_timer *timer, | |
738 | struct list_head *head) | |
1da177e4 | 739 | { |
53d2f744 | 740 | struct snd_timer_instance *ti; |
1da177e4 | 741 | unsigned long resolution, ticks; |
230323da | 742 | |
8748b850 TI |
743 | while (!list_empty(head)) { |
744 | ti = list_first_entry(head, struct snd_timer_instance, | |
745 | ack_list); | |
1da177e4 | 746 | |
df55531b TI |
747 | /* remove from ack_list and make empty */ |
748 | list_del_init(&ti->ack_list); | |
749 | ||
fe1b26c9 TI |
750 | if (!(ti->flags & SNDRV_TIMER_IFLG_DEAD)) { |
751 | ticks = ti->pticks; | |
752 | ti->pticks = 0; | |
753 | resolution = ti->resolution; | |
df55531b | 754 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; |
fe1b26c9 TI |
755 | spin_unlock(&timer->lock); |
756 | if (ti->callback) | |
757 | ti->callback(ti, resolution, ticks); | |
758 | spin_lock(&timer->lock); | |
df55531b | 759 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; |
fe1b26c9 | 760 | } |
1da177e4 | 761 | } |
8748b850 TI |
762 | } |
763 | ||
7bb4a8a2 TI |
764 | /* clear pending instances from ack list */ |
765 | static void snd_timer_clear_callbacks(struct snd_timer *timer, | |
766 | struct list_head *head) | |
767 | { | |
768 | unsigned long flags; | |
769 | ||
770 | spin_lock_irqsave(&timer->lock, flags); | |
771 | while (!list_empty(head)) | |
772 | list_del_init(head->next); | |
773 | spin_unlock_irqrestore(&timer->lock, flags); | |
774 | } | |
775 | ||
1da177e4 LT |
776 | /* |
777 | * timer tasklet | |
778 | * | |
779 | */ | |
780 | static void snd_timer_tasklet(unsigned long arg) | |
781 | { | |
53d2f744 | 782 | struct snd_timer *timer = (struct snd_timer *) arg; |
2999ff5b | 783 | unsigned long flags; |
1da177e4 | 784 | |
7bb4a8a2 TI |
785 | if (timer->card && timer->card->shutdown) { |
786 | snd_timer_clear_callbacks(timer, &timer->sack_list_head); | |
230323da | 787 | return; |
7bb4a8a2 | 788 | } |
230323da | 789 | |
2999ff5b | 790 | spin_lock_irqsave(&timer->lock, flags); |
8748b850 | 791 | snd_timer_process_callbacks(timer, &timer->sack_list_head); |
2999ff5b | 792 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
793 | } |
794 | ||
795 | /* | |
796 | * timer interrupt | |
797 | * | |
798 | * ticks_left is usually equal to timer->sticks. | |
799 | * | |
800 | */ | |
53d2f744 | 801 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 802 | { |
9244b2c3 | 803 | struct snd_timer_instance *ti, *ts, *tmp; |
8748b850 TI |
804 | unsigned long resolution; |
805 | struct list_head *ack_list_head; | |
b32425ac | 806 | unsigned long flags; |
1da177e4 LT |
807 | int use_tasklet = 0; |
808 | ||
809 | if (timer == NULL) | |
810 | return; | |
811 | ||
7bb4a8a2 TI |
812 | if (timer->card && timer->card->shutdown) { |
813 | snd_timer_clear_callbacks(timer, &timer->ack_list_head); | |
230323da | 814 | return; |
7bb4a8a2 | 815 | } |
230323da | 816 | |
b32425ac | 817 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
818 | |
819 | /* remember the current resolution */ | |
fdcb5761 | 820 | resolution = snd_timer_hw_resolution(timer); |
1da177e4 LT |
821 | |
822 | /* loop for all active instances | |
9244b2c3 | 823 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
824 | * processed instance is relinked to done_list_head before the callback |
825 | * is called. | |
1da177e4 | 826 | */ |
9244b2c3 JB |
827 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
828 | active_list) { | |
fe1b26c9 TI |
829 | if (ti->flags & SNDRV_TIMER_IFLG_DEAD) |
830 | continue; | |
1da177e4 LT |
831 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
832 | continue; | |
833 | ti->pticks += ticks_left; | |
834 | ti->resolution = resolution; | |
835 | if (ti->cticks < ticks_left) | |
836 | ti->cticks = 0; | |
837 | else | |
838 | ti->cticks -= ticks_left; | |
839 | if (ti->cticks) /* not expired */ | |
840 | continue; | |
841 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
842 | ti->cticks = ti->ticks; | |
843 | } else { | |
844 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
845 | --timer->running; |
846 | list_del_init(&ti->active_list); | |
1da177e4 | 847 | } |
6b172a85 CL |
848 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
849 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
850 | ack_list_head = &timer->ack_list_head; | |
851 | else | |
852 | ack_list_head = &timer->sack_list_head; | |
853 | if (list_empty(&ti->ack_list)) | |
854 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 855 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
856 | ts->pticks = ti->pticks; |
857 | ts->resolution = resolution; | |
6b172a85 CL |
858 | if (list_empty(&ts->ack_list)) |
859 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
860 | } |
861 | } | |
862 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 863 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
864 | if (timer->running) { |
865 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
866 | timer->hw.stop(timer); | |
867 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
868 | } | |
869 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
870 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
871 | /* restart timer */ | |
872 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
873 | timer->hw.start(timer); | |
874 | } | |
875 | } else { | |
876 | timer->hw.stop(timer); | |
877 | } | |
878 | ||
879 | /* now process all fast callbacks */ | |
8748b850 | 880 | snd_timer_process_callbacks(timer, &timer->ack_list_head); |
1da177e4 LT |
881 | |
882 | /* do we have any slow callbacks? */ | |
883 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 884 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
885 | |
886 | if (use_tasklet) | |
1f04128a | 887 | tasklet_schedule(&timer->task_queue); |
1da177e4 | 888 | } |
98856392 | 889 | EXPORT_SYMBOL(snd_timer_interrupt); |
1da177e4 LT |
890 | |
891 | /* | |
892 | ||
893 | */ | |
894 | ||
53d2f744 TI |
895 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
896 | struct snd_timer **rtimer) | |
1da177e4 | 897 | { |
53d2f744 | 898 | struct snd_timer *timer; |
1da177e4 | 899 | int err; |
53d2f744 | 900 | static struct snd_device_ops ops = { |
1da177e4 LT |
901 | .dev_free = snd_timer_dev_free, |
902 | .dev_register = snd_timer_dev_register, | |
c461482c | 903 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
904 | }; |
905 | ||
7eaa943c TI |
906 | if (snd_BUG_ON(!tid)) |
907 | return -EINVAL; | |
d10ee9c5 S |
908 | if (tid->dev_class == SNDRV_TIMER_CLASS_CARD || |
909 | tid->dev_class == SNDRV_TIMER_CLASS_PCM) { | |
910 | if (WARN_ON(!card)) | |
911 | return -EINVAL; | |
912 | } | |
7eaa943c TI |
913 | if (rtimer) |
914 | *rtimer = NULL; | |
ca2c0966 | 915 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 916 | if (!timer) |
1da177e4 LT |
917 | return -ENOMEM; |
918 | timer->tmr_class = tid->dev_class; | |
919 | timer->card = card; | |
920 | timer->tmr_device = tid->device; | |
921 | timer->tmr_subdevice = tid->subdevice; | |
922 | if (id) | |
923 | strlcpy(timer->id, id, sizeof(timer->id)); | |
6b760bb2 | 924 | timer->sticks = 1; |
1da177e4 LT |
925 | INIT_LIST_HEAD(&timer->device_list); |
926 | INIT_LIST_HEAD(&timer->open_list_head); | |
927 | INIT_LIST_HEAD(&timer->active_list_head); | |
928 | INIT_LIST_HEAD(&timer->ack_list_head); | |
929 | INIT_LIST_HEAD(&timer->sack_list_head); | |
930 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
931 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
932 | (unsigned long)timer); | |
9b7d869e | 933 | timer->max_instances = 1000; /* default limit per timer */ |
1da177e4 | 934 | if (card != NULL) { |
de24214d | 935 | timer->module = card->module; |
6b172a85 CL |
936 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
937 | if (err < 0) { | |
1da177e4 LT |
938 | snd_timer_free(timer); |
939 | return err; | |
940 | } | |
941 | } | |
7eaa943c TI |
942 | if (rtimer) |
943 | *rtimer = timer; | |
1da177e4 LT |
944 | return 0; |
945 | } | |
98856392 | 946 | EXPORT_SYMBOL(snd_timer_new); |
1da177e4 | 947 | |
53d2f744 | 948 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 949 | { |
7eaa943c TI |
950 | if (!timer) |
951 | return 0; | |
c461482c TI |
952 | |
953 | mutex_lock(®ister_mutex); | |
954 | if (! list_empty(&timer->open_list_head)) { | |
955 | struct list_head *p, *n; | |
956 | struct snd_timer_instance *ti; | |
cf74dcf3 | 957 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
958 | list_for_each_safe(p, n, &timer->open_list_head) { |
959 | list_del_init(p); | |
960 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
961 | ti->timer = NULL; | |
962 | } | |
963 | } | |
964 | list_del(&timer->device_list); | |
965 | mutex_unlock(®ister_mutex); | |
966 | ||
1da177e4 LT |
967 | if (timer->private_free) |
968 | timer->private_free(timer); | |
969 | kfree(timer); | |
970 | return 0; | |
971 | } | |
972 | ||
53d2f744 | 973 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 974 | { |
53d2f744 | 975 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
976 | return snd_timer_free(timer); |
977 | } | |
978 | ||
53d2f744 | 979 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 980 | { |
53d2f744 TI |
981 | struct snd_timer *timer = dev->device_data; |
982 | struct snd_timer *timer1; | |
1da177e4 | 983 | |
7eaa943c TI |
984 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
985 | return -ENXIO; | |
1da177e4 LT |
986 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
987 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
988 | return -EINVAL; | |
989 | ||
1a60d4c5 | 990 | mutex_lock(®ister_mutex); |
9244b2c3 | 991 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
992 | if (timer1->tmr_class > timer->tmr_class) |
993 | break; | |
994 | if (timer1->tmr_class < timer->tmr_class) | |
995 | continue; | |
996 | if (timer1->card && timer->card) { | |
997 | if (timer1->card->number > timer->card->number) | |
998 | break; | |
999 | if (timer1->card->number < timer->card->number) | |
1000 | continue; | |
1001 | } | |
1002 | if (timer1->tmr_device > timer->tmr_device) | |
1003 | break; | |
1004 | if (timer1->tmr_device < timer->tmr_device) | |
1005 | continue; | |
1006 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
1007 | break; | |
1008 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
1009 | continue; | |
1010 | /* conflicts.. */ | |
1a60d4c5 | 1011 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1012 | return -EBUSY; |
1013 | } | |
9244b2c3 | 1014 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 1015 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1016 | return 0; |
1017 | } | |
1018 | ||
c461482c | 1019 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 1020 | { |
c461482c | 1021 | struct snd_timer *timer = device->device_data; |
230323da TI |
1022 | struct snd_timer_instance *ti; |
1023 | ||
1a60d4c5 | 1024 | mutex_lock(®ister_mutex); |
c461482c | 1025 | list_del_init(&timer->device_list); |
230323da TI |
1026 | /* wake up pending sleepers */ |
1027 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
1028 | if (ti->disconnect) |
1029 | ti->disconnect(ti); | |
230323da | 1030 | } |
1a60d4c5 | 1031 | mutex_unlock(®ister_mutex); |
c461482c | 1032 | return 0; |
1da177e4 LT |
1033 | } |
1034 | ||
53d2f744 | 1035 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
1036 | { |
1037 | unsigned long flags; | |
1038 | unsigned long resolution = 0; | |
53d2f744 | 1039 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 1040 | |
230323da TI |
1041 | if (timer->card && timer->card->shutdown) |
1042 | return; | |
7c22f1aa TI |
1043 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
1044 | return; | |
7eaa943c TI |
1045 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
1046 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
1047 | return; | |
1da177e4 | 1048 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
1049 | if (event == SNDRV_TIMER_EVENT_MSTART || |
1050 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
fdcb5761 TI |
1051 | event == SNDRV_TIMER_EVENT_MRESUME) |
1052 | resolution = snd_timer_hw_resolution(timer); | |
9244b2c3 | 1053 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
1054 | if (ti->ccallback) |
1055 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 1056 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
1057 | if (ts->ccallback) |
1058 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
1059 | } |
1060 | spin_unlock_irqrestore(&timer->lock, flags); | |
1061 | } | |
98856392 | 1062 | EXPORT_SYMBOL(snd_timer_notify); |
1da177e4 LT |
1063 | |
1064 | /* | |
1065 | * exported functions for global timers | |
1066 | */ | |
53d2f744 | 1067 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 1068 | { |
53d2f744 | 1069 | struct snd_timer_id tid; |
6b172a85 | 1070 | |
1da177e4 LT |
1071 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
1072 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1073 | tid.card = -1; | |
1074 | tid.device = device; | |
1075 | tid.subdevice = 0; | |
1076 | return snd_timer_new(NULL, id, &tid, rtimer); | |
1077 | } | |
98856392 | 1078 | EXPORT_SYMBOL(snd_timer_global_new); |
1da177e4 | 1079 | |
53d2f744 | 1080 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
1081 | { |
1082 | return snd_timer_free(timer); | |
1083 | } | |
98856392 | 1084 | EXPORT_SYMBOL(snd_timer_global_free); |
1da177e4 | 1085 | |
53d2f744 | 1086 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 1087 | { |
53d2f744 | 1088 | struct snd_device dev; |
1da177e4 LT |
1089 | |
1090 | memset(&dev, 0, sizeof(dev)); | |
1091 | dev.device_data = timer; | |
1092 | return snd_timer_dev_register(&dev); | |
1093 | } | |
98856392 | 1094 | EXPORT_SYMBOL(snd_timer_global_register); |
1da177e4 | 1095 | |
6b172a85 | 1096 | /* |
1da177e4 LT |
1097 | * System timer |
1098 | */ | |
1099 | ||
1100 | struct snd_timer_system_private { | |
1101 | struct timer_list tlist; | |
38e9a80f | 1102 | struct snd_timer *snd_timer; |
1da177e4 LT |
1103 | unsigned long last_expires; |
1104 | unsigned long last_jiffies; | |
1105 | unsigned long correction; | |
1106 | }; | |
1107 | ||
38e9a80f | 1108 | static void snd_timer_s_function(struct timer_list *t) |
1da177e4 | 1109 | { |
38e9a80f KC |
1110 | struct snd_timer_system_private *priv = from_timer(priv, t, |
1111 | tlist); | |
1112 | struct snd_timer *timer = priv->snd_timer; | |
1da177e4 LT |
1113 | unsigned long jiff = jiffies; |
1114 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1115 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1116 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1117 | } | |
1118 | ||
53d2f744 | 1119 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1120 | { |
1121 | struct snd_timer_system_private *priv; | |
1122 | unsigned long njiff; | |
1123 | ||
1124 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1125 | njiff = (priv->last_jiffies = jiffies); | |
1126 | if (priv->correction > timer->sticks - 1) { | |
1127 | priv->correction -= timer->sticks - 1; | |
1128 | njiff++; | |
1129 | } else { | |
1130 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1131 | priv->correction = 0; |
1da177e4 | 1132 | } |
4a07083e TI |
1133 | priv->last_expires = njiff; |
1134 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1135 | return 0; |
1136 | } | |
1137 | ||
53d2f744 | 1138 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1139 | { |
1140 | struct snd_timer_system_private *priv; | |
1141 | unsigned long jiff; | |
1142 | ||
1143 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1144 | del_timer(&priv->tlist); | |
1145 | jiff = jiffies; | |
1146 | if (time_before(jiff, priv->last_expires)) | |
1147 | timer->sticks = priv->last_expires - jiff; | |
1148 | else | |
1149 | timer->sticks = 1; | |
de2696d8 | 1150 | priv->correction = 0; |
1da177e4 LT |
1151 | return 0; |
1152 | } | |
1153 | ||
f146357f TI |
1154 | static int snd_timer_s_close(struct snd_timer *timer) |
1155 | { | |
1156 | struct snd_timer_system_private *priv; | |
1157 | ||
1158 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1159 | del_timer_sync(&priv->tlist); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
53d2f744 | 1163 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1164 | { |
1165 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1166 | .resolution = 1000000000L / HZ, | |
1167 | .ticks = 10000000L, | |
f146357f | 1168 | .close = snd_timer_s_close, |
1da177e4 LT |
1169 | .start = snd_timer_s_start, |
1170 | .stop = snd_timer_s_stop | |
1171 | }; | |
1172 | ||
53d2f744 | 1173 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1174 | { |
1175 | kfree(timer->private_data); | |
1176 | } | |
1177 | ||
1178 | static int snd_timer_register_system(void) | |
1179 | { | |
53d2f744 | 1180 | struct snd_timer *timer; |
1da177e4 LT |
1181 | struct snd_timer_system_private *priv; |
1182 | int err; | |
1183 | ||
6b172a85 CL |
1184 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1185 | if (err < 0) | |
1da177e4 LT |
1186 | return err; |
1187 | strcpy(timer->name, "system timer"); | |
1188 | timer->hw = snd_timer_system; | |
ca2c0966 | 1189 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1190 | if (priv == NULL) { |
1191 | snd_timer_free(timer); | |
1192 | return -ENOMEM; | |
1193 | } | |
38e9a80f KC |
1194 | priv->snd_timer = timer; |
1195 | timer_setup(&priv->tlist, snd_timer_s_function, 0); | |
1da177e4 LT |
1196 | timer->private_data = priv; |
1197 | timer->private_free = snd_timer_free_system; | |
1198 | return snd_timer_global_register(timer); | |
1199 | } | |
1200 | ||
cd6a6503 | 1201 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1202 | /* |
1203 | * Info interface | |
1204 | */ | |
1205 | ||
53d2f744 TI |
1206 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1207 | struct snd_info_buffer *buffer) | |
1da177e4 | 1208 | { |
53d2f744 TI |
1209 | struct snd_timer *timer; |
1210 | struct snd_timer_instance *ti; | |
1da177e4 | 1211 | |
1a60d4c5 | 1212 | mutex_lock(®ister_mutex); |
9244b2c3 | 1213 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1214 | if (timer->card && timer->card->shutdown) |
1215 | continue; | |
1da177e4 LT |
1216 | switch (timer->tmr_class) { |
1217 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1218 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1219 | break; | |
1220 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1221 | snd_iprintf(buffer, "C%i-%i: ", |
1222 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1223 | break; |
1224 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1225 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1226 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1227 | break; |
1228 | default: | |
6b172a85 CL |
1229 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1230 | timer->card ? timer->card->number : -1, | |
1231 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1232 | } |
1233 | snd_iprintf(buffer, "%s :", timer->name); | |
1234 | if (timer->hw.resolution) | |
6b172a85 CL |
1235 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1236 | timer->hw.resolution / 1000, | |
1237 | timer->hw.resolution % 1000, | |
1238 | timer->hw.ticks); | |
1da177e4 LT |
1239 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1240 | snd_iprintf(buffer, " SLAVE"); | |
1241 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1242 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1243 | snd_iprintf(buffer, " Client %s : %s\n", |
1244 | ti->owner ? ti->owner : "unknown", | |
1245 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1246 | SNDRV_TIMER_IFLG_RUNNING) | |
1247 | ? "running" : "stopped"); | |
1da177e4 | 1248 | } |
1a60d4c5 | 1249 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1250 | } |
1251 | ||
6581f4e7 | 1252 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1253 | |
1254 | static void __init snd_timer_proc_init(void) | |
1255 | { | |
1256 | struct snd_info_entry *entry; | |
1257 | ||
1258 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1259 | if (entry != NULL) { | |
e28563cc TI |
1260 | entry->c.text.read = snd_timer_proc_read; |
1261 | if (snd_info_register(entry) < 0) { | |
1262 | snd_info_free_entry(entry); | |
1263 | entry = NULL; | |
1264 | } | |
1265 | } | |
1266 | snd_timer_proc_entry = entry; | |
1267 | } | |
1268 | ||
1269 | static void __exit snd_timer_proc_done(void) | |
1270 | { | |
746d4a02 | 1271 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1272 | } |
cd6a6503 | 1273 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1274 | #define snd_timer_proc_init() |
1275 | #define snd_timer_proc_done() | |
1276 | #endif | |
1277 | ||
1da177e4 LT |
1278 | /* |
1279 | * USER SPACE interface | |
1280 | */ | |
1281 | ||
53d2f744 | 1282 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1283 | unsigned long resolution, |
1284 | unsigned long ticks) | |
1285 | { | |
53d2f744 TI |
1286 | struct snd_timer_user *tu = timeri->callback_data; |
1287 | struct snd_timer_read *r; | |
1da177e4 | 1288 | int prev; |
6b172a85 | 1289 | |
1da177e4 LT |
1290 | spin_lock(&tu->qlock); |
1291 | if (tu->qused > 0) { | |
1292 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1293 | r = &tu->queue[prev]; | |
1294 | if (r->resolution == resolution) { | |
1295 | r->ticks += ticks; | |
1296 | goto __wake; | |
1297 | } | |
1298 | } | |
1299 | if (tu->qused >= tu->queue_size) { | |
1300 | tu->overrun++; | |
1301 | } else { | |
1302 | r = &tu->queue[tu->qtail++]; | |
1303 | tu->qtail %= tu->queue_size; | |
1304 | r->resolution = resolution; | |
1305 | r->ticks = ticks; | |
1306 | tu->qused++; | |
1307 | } | |
1308 | __wake: | |
1309 | spin_unlock(&tu->qlock); | |
1310 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1311 | wake_up(&tu->qchange_sleep); | |
1312 | } | |
1313 | ||
53d2f744 TI |
1314 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1315 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1316 | { |
1317 | if (tu->qused >= tu->queue_size) { | |
1318 | tu->overrun++; | |
1319 | } else { | |
1320 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1321 | tu->qtail %= tu->queue_size; | |
1322 | tu->qused++; | |
1323 | } | |
1324 | } | |
1325 | ||
53d2f744 TI |
1326 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1327 | int event, | |
1da177e4 LT |
1328 | struct timespec *tstamp, |
1329 | unsigned long resolution) | |
1330 | { | |
53d2f744 TI |
1331 | struct snd_timer_user *tu = timeri->callback_data; |
1332 | struct snd_timer_tread r1; | |
bfe70783 | 1333 | unsigned long flags; |
1da177e4 | 1334 | |
6b172a85 CL |
1335 | if (event >= SNDRV_TIMER_EVENT_START && |
1336 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1337 | tu->tstamp = *tstamp; |
1338 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1339 | return; | |
9a47e9cf | 1340 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1341 | r1.event = event; |
1342 | r1.tstamp = *tstamp; | |
1343 | r1.val = resolution; | |
bfe70783 | 1344 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1345 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1346 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1347 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1348 | wake_up(&tu->qchange_sleep); | |
1349 | } | |
1350 | ||
40ed9444 TI |
1351 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1352 | { | |
1353 | struct snd_timer_user *tu = timeri->callback_data; | |
1354 | ||
1355 | tu->disconnected = true; | |
1356 | wake_up(&tu->qchange_sleep); | |
1357 | } | |
1358 | ||
53d2f744 | 1359 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1360 | unsigned long resolution, |
1361 | unsigned long ticks) | |
1362 | { | |
53d2f744 TI |
1363 | struct snd_timer_user *tu = timeri->callback_data; |
1364 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1365 | struct timespec tstamp; |
1366 | int prev, append = 0; | |
1367 | ||
a8c006aa | 1368 | memset(&r1, 0, sizeof(r1)); |
07799e75 | 1369 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1370 | spin_lock(&tu->qlock); |
6b172a85 CL |
1371 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1372 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1373 | spin_unlock(&tu->qlock); |
1374 | return; | |
1375 | } | |
b751eef1 JK |
1376 | if (tu->last_resolution != resolution || ticks > 0) { |
1377 | if (timer_tstamp_monotonic) | |
26204e04 | 1378 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1379 | else |
1380 | getnstimeofday(&tstamp); | |
1381 | } | |
6b172a85 CL |
1382 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1383 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1384 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1385 | r1.tstamp = tstamp; | |
1386 | r1.val = resolution; | |
1387 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1388 | tu->last_resolution = resolution; | |
1389 | append++; | |
1390 | } | |
1391 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1392 | goto __wake; | |
1393 | if (ticks == 0) | |
1394 | goto __wake; | |
1395 | if (tu->qused > 0) { | |
1396 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1397 | r = &tu->tqueue[prev]; | |
1398 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1399 | r->tstamp = tstamp; | |
1400 | r->val += ticks; | |
1401 | append++; | |
1402 | goto __wake; | |
1403 | } | |
1404 | } | |
1405 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1406 | r1.tstamp = tstamp; | |
1407 | r1.val = ticks; | |
1408 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1409 | append++; | |
1410 | __wake: | |
1411 | spin_unlock(&tu->qlock); | |
1412 | if (append == 0) | |
1413 | return; | |
1414 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1415 | wake_up(&tu->qchange_sleep); | |
1416 | } | |
1417 | ||
890e2cb5 TI |
1418 | static int realloc_user_queue(struct snd_timer_user *tu, int size) |
1419 | { | |
1420 | struct snd_timer_read *queue = NULL; | |
1421 | struct snd_timer_tread *tqueue = NULL; | |
1422 | ||
1423 | if (tu->tread) { | |
1424 | tqueue = kcalloc(size, sizeof(*tqueue), GFP_KERNEL); | |
1425 | if (!tqueue) | |
1426 | return -ENOMEM; | |
1427 | } else { | |
1428 | queue = kcalloc(size, sizeof(*queue), GFP_KERNEL); | |
1429 | if (!queue) | |
1430 | return -ENOMEM; | |
1431 | } | |
1432 | ||
1433 | spin_lock_irq(&tu->qlock); | |
1434 | kfree(tu->queue); | |
1435 | kfree(tu->tqueue); | |
1436 | tu->queue_size = size; | |
1437 | tu->queue = queue; | |
1438 | tu->tqueue = tqueue; | |
1439 | tu->qhead = tu->qtail = tu->qused = 0; | |
1440 | spin_unlock_irq(&tu->qlock); | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
1da177e4 LT |
1445 | static int snd_timer_user_open(struct inode *inode, struct file *file) |
1446 | { | |
53d2f744 | 1447 | struct snd_timer_user *tu; |
02f4865f TI |
1448 | int err; |
1449 | ||
c5bf68fe | 1450 | err = stream_open(inode, file); |
02f4865f TI |
1451 | if (err < 0) |
1452 | return err; | |
6b172a85 | 1453 | |
ca2c0966 | 1454 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1455 | if (tu == NULL) |
1456 | return -ENOMEM; | |
1457 | spin_lock_init(&tu->qlock); | |
1458 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1459 | mutex_init(&tu->ioctl_lock); |
1da177e4 | 1460 | tu->ticks = 1; |
890e2cb5 | 1461 | if (realloc_user_queue(tu, 128) < 0) { |
1da177e4 LT |
1462 | kfree(tu); |
1463 | return -ENOMEM; | |
1464 | } | |
1465 | file->private_data = tu; | |
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1470 | { | |
53d2f744 | 1471 | struct snd_timer_user *tu; |
1da177e4 LT |
1472 | |
1473 | if (file->private_data) { | |
1474 | tu = file->private_data; | |
1475 | file->private_data = NULL; | |
af368027 | 1476 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
1477 | if (tu->timeri) |
1478 | snd_timer_close(tu->timeri); | |
af368027 | 1479 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1480 | kfree(tu->queue); |
1481 | kfree(tu->tqueue); | |
1482 | kfree(tu); | |
1483 | } | |
1484 | return 0; | |
1485 | } | |
1486 | ||
53d2f744 | 1487 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1488 | { |
1489 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1490 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1491 | id->card = -1; | |
1492 | id->device = -1; | |
1493 | id->subdevice = -1; | |
1494 | } | |
1495 | ||
53d2f744 | 1496 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1497 | { |
1498 | id->dev_class = timer->tmr_class; | |
1499 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1500 | id->card = timer->card ? timer->card->number : -1; | |
1501 | id->device = timer->tmr_device; | |
1502 | id->subdevice = timer->tmr_subdevice; | |
1503 | } | |
1504 | ||
53d2f744 | 1505 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1506 | { |
53d2f744 TI |
1507 | struct snd_timer_id id; |
1508 | struct snd_timer *timer; | |
1da177e4 | 1509 | struct list_head *p; |
6b172a85 | 1510 | |
1da177e4 LT |
1511 | if (copy_from_user(&id, _tid, sizeof(id))) |
1512 | return -EFAULT; | |
1a60d4c5 | 1513 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1514 | if (id.dev_class < 0) { /* first item */ |
1515 | if (list_empty(&snd_timer_list)) | |
1516 | snd_timer_user_zero_id(&id); | |
1517 | else { | |
9dfba380 | 1518 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1519 | struct snd_timer, device_list); |
1da177e4 LT |
1520 | snd_timer_user_copy_id(&id, timer); |
1521 | } | |
1522 | } else { | |
1523 | switch (id.dev_class) { | |
1524 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1525 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1526 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1527 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1528 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1529 | snd_timer_user_copy_id(&id, timer); | |
1530 | break; | |
1531 | } | |
1532 | if (timer->tmr_device >= id.device) { | |
1533 | snd_timer_user_copy_id(&id, timer); | |
1534 | break; | |
1535 | } | |
1536 | } | |
1537 | if (p == &snd_timer_list) | |
1538 | snd_timer_user_zero_id(&id); | |
1539 | break; | |
1540 | case SNDRV_TIMER_CLASS_CARD: | |
1541 | case SNDRV_TIMER_CLASS_PCM: | |
1542 | if (id.card < 0) { | |
1543 | id.card = 0; | |
1544 | } else { | |
e8ed6820 DC |
1545 | if (id.device < 0) { |
1546 | id.device = 0; | |
1da177e4 | 1547 | } else { |
e8ed6820 DC |
1548 | if (id.subdevice < 0) |
1549 | id.subdevice = 0; | |
b41f794f | 1550 | else if (id.subdevice < INT_MAX) |
e8ed6820 | 1551 | id.subdevice++; |
1da177e4 LT |
1552 | } |
1553 | } | |
1554 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1555 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1556 | if (timer->tmr_class > id.dev_class) { |
1557 | snd_timer_user_copy_id(&id, timer); | |
1558 | break; | |
1559 | } | |
1560 | if (timer->tmr_class < id.dev_class) | |
1561 | continue; | |
1562 | if (timer->card->number > id.card) { | |
1563 | snd_timer_user_copy_id(&id, timer); | |
1564 | break; | |
1565 | } | |
1566 | if (timer->card->number < id.card) | |
1567 | continue; | |
1568 | if (timer->tmr_device > id.device) { | |
1569 | snd_timer_user_copy_id(&id, timer); | |
1570 | break; | |
1571 | } | |
1572 | if (timer->tmr_device < id.device) | |
1573 | continue; | |
1574 | if (timer->tmr_subdevice > id.subdevice) { | |
1575 | snd_timer_user_copy_id(&id, timer); | |
1576 | break; | |
1577 | } | |
1578 | if (timer->tmr_subdevice < id.subdevice) | |
1579 | continue; | |
1580 | snd_timer_user_copy_id(&id, timer); | |
1581 | break; | |
1582 | } | |
1583 | if (p == &snd_timer_list) | |
1584 | snd_timer_user_zero_id(&id); | |
1585 | break; | |
1586 | default: | |
1587 | snd_timer_user_zero_id(&id); | |
1588 | } | |
1589 | } | |
1a60d4c5 | 1590 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1591 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1592 | return -EFAULT; | |
1593 | return 0; | |
6b172a85 | 1594 | } |
1da177e4 | 1595 | |
6b172a85 | 1596 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1597 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1598 | { |
53d2f744 TI |
1599 | struct snd_timer_ginfo *ginfo; |
1600 | struct snd_timer_id tid; | |
1601 | struct snd_timer *t; | |
1da177e4 LT |
1602 | struct list_head *p; |
1603 | int err = 0; | |
1604 | ||
ef44a1ec LZ |
1605 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1606 | if (IS_ERR(ginfo)) | |
1607 | return PTR_ERR(ginfo); | |
1608 | ||
1da177e4 LT |
1609 | tid = ginfo->tid; |
1610 | memset(ginfo, 0, sizeof(*ginfo)); | |
1611 | ginfo->tid = tid; | |
1a60d4c5 | 1612 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1613 | t = snd_timer_find(&tid); |
1614 | if (t != NULL) { | |
1615 | ginfo->card = t->card ? t->card->number : -1; | |
1616 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1617 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1618 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1619 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1620 | ginfo->resolution = t->hw.resolution; | |
1621 | if (t->hw.resolution_min > 0) { | |
1622 | ginfo->resolution_min = t->hw.resolution_min; | |
1623 | ginfo->resolution_max = t->hw.resolution_max; | |
1624 | } | |
1625 | list_for_each(p, &t->open_list_head) { | |
1626 | ginfo->clients++; | |
1627 | } | |
1628 | } else { | |
1629 | err = -ENODEV; | |
1630 | } | |
1a60d4c5 | 1631 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1632 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1633 | err = -EFAULT; | |
1634 | kfree(ginfo); | |
1635 | return err; | |
1636 | } | |
1637 | ||
91d2178e | 1638 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1639 | { |
53d2f744 | 1640 | struct snd_timer *t; |
1da177e4 LT |
1641 | int err; |
1642 | ||
1a60d4c5 | 1643 | mutex_lock(®ister_mutex); |
91d2178e | 1644 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1645 | if (!t) { |
1da177e4 | 1646 | err = -ENODEV; |
6b172a85 CL |
1647 | goto _error; |
1648 | } | |
1649 | if (!list_empty(&t->open_list_head)) { | |
1650 | err = -EBUSY; | |
1651 | goto _error; | |
1652 | } | |
1653 | if (!t->hw.set_period) { | |
1654 | err = -ENOSYS; | |
1655 | goto _error; | |
1da177e4 | 1656 | } |
91d2178e | 1657 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1658 | _error: |
1a60d4c5 | 1659 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1660 | return err; |
1661 | } | |
1662 | ||
91d2178e TS |
1663 | static int snd_timer_user_gparams(struct file *file, |
1664 | struct snd_timer_gparams __user *_gparams) | |
1665 | { | |
1666 | struct snd_timer_gparams gparams; | |
1667 | ||
1668 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1669 | return -EFAULT; | |
1670 | return timer_set_gparams(&gparams); | |
1671 | } | |
1672 | ||
6b172a85 | 1673 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1674 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1675 | { |
53d2f744 TI |
1676 | struct snd_timer_gstatus gstatus; |
1677 | struct snd_timer_id tid; | |
1678 | struct snd_timer *t; | |
1da177e4 LT |
1679 | int err = 0; |
1680 | ||
1681 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1682 | return -EFAULT; | |
1683 | tid = gstatus.tid; | |
1684 | memset(&gstatus, 0, sizeof(gstatus)); | |
1685 | gstatus.tid = tid; | |
1a60d4c5 | 1686 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1687 | t = snd_timer_find(&tid); |
1688 | if (t != NULL) { | |
9d4d207d | 1689 | spin_lock_irq(&t->lock); |
fdcb5761 | 1690 | gstatus.resolution = snd_timer_hw_resolution(t); |
1da177e4 | 1691 | if (t->hw.precise_resolution) { |
6b172a85 CL |
1692 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1693 | &gstatus.resolution_den); | |
1da177e4 LT |
1694 | } else { |
1695 | gstatus.resolution_num = gstatus.resolution; | |
1696 | gstatus.resolution_den = 1000000000uL; | |
1697 | } | |
9d4d207d | 1698 | spin_unlock_irq(&t->lock); |
1da177e4 LT |
1699 | } else { |
1700 | err = -ENODEV; | |
1701 | } | |
1a60d4c5 | 1702 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1703 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1704 | err = -EFAULT; | |
1705 | return err; | |
1706 | } | |
1707 | ||
6b172a85 | 1708 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1709 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1710 | { |
53d2f744 TI |
1711 | struct snd_timer_user *tu; |
1712 | struct snd_timer_select tselect; | |
1da177e4 | 1713 | char str[32]; |
c1935b4d | 1714 | int err = 0; |
6b172a85 | 1715 | |
1da177e4 | 1716 | tu = file->private_data; |
c1935b4d | 1717 | if (tu->timeri) { |
1da177e4 | 1718 | snd_timer_close(tu->timeri); |
c1935b4d JK |
1719 | tu->timeri = NULL; |
1720 | } | |
1721 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1722 | err = -EFAULT; | |
1723 | goto __err; | |
1724 | } | |
1da177e4 LT |
1725 | sprintf(str, "application %i", current->pid); |
1726 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1727 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6b172a85 CL |
1728 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
1729 | if (err < 0) | |
c1935b4d | 1730 | goto __err; |
1da177e4 | 1731 | |
890e2cb5 TI |
1732 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; |
1733 | tu->timeri->callback = tu->tread | |
6b172a85 | 1734 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; |
890e2cb5 TI |
1735 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1736 | tu->timeri->callback_data = (void *)tu; | |
1737 | tu->timeri->disconnect = snd_timer_user_disconnect; | |
c1935b4d JK |
1738 | |
1739 | __err: | |
c1935b4d | 1740 | return err; |
1da177e4 LT |
1741 | } |
1742 | ||
6b172a85 | 1743 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1744 | struct snd_timer_info __user *_info) |
1da177e4 | 1745 | { |
53d2f744 TI |
1746 | struct snd_timer_user *tu; |
1747 | struct snd_timer_info *info; | |
1748 | struct snd_timer *t; | |
1da177e4 LT |
1749 | int err = 0; |
1750 | ||
1751 | tu = file->private_data; | |
7c64ec34 CL |
1752 | if (!tu->timeri) |
1753 | return -EBADFD; | |
1da177e4 | 1754 | t = tu->timeri->timer; |
7c64ec34 CL |
1755 | if (!t) |
1756 | return -EBADFD; | |
1da177e4 | 1757 | |
ca2c0966 | 1758 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1759 | if (! info) |
1760 | return -ENOMEM; | |
1761 | info->card = t->card ? t->card->number : -1; | |
1762 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1763 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1764 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1765 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1766 | info->resolution = t->hw.resolution; | |
1767 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1768 | err = -EFAULT; | |
1769 | kfree(info); | |
1770 | return err; | |
1771 | } | |
1772 | ||
6b172a85 | 1773 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1774 | struct snd_timer_params __user *_params) |
1da177e4 | 1775 | { |
53d2f744 TI |
1776 | struct snd_timer_user *tu; |
1777 | struct snd_timer_params params; | |
1778 | struct snd_timer *t; | |
1da177e4 | 1779 | int err; |
6b172a85 | 1780 | |
1da177e4 | 1781 | tu = file->private_data; |
7c64ec34 CL |
1782 | if (!tu->timeri) |
1783 | return -EBADFD; | |
1da177e4 | 1784 | t = tu->timeri->timer; |
7c64ec34 CL |
1785 | if (!t) |
1786 | return -EBADFD; | |
1da177e4 LT |
1787 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1788 | return -EFAULT; | |
71321eb3 TI |
1789 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { |
1790 | u64 resolution; | |
1791 | ||
1792 | if (params.ticks < 1) { | |
1793 | err = -EINVAL; | |
1794 | goto _end; | |
1795 | } | |
1796 | ||
1797 | /* Don't allow resolution less than 1ms */ | |
1798 | resolution = snd_timer_resolution(tu->timeri); | |
1799 | resolution *= params.ticks; | |
1800 | if (resolution < 1000000) { | |
1801 | err = -EINVAL; | |
1802 | goto _end; | |
1803 | } | |
1da177e4 | 1804 | } |
6b172a85 CL |
1805 | if (params.queue_size > 0 && |
1806 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1807 | err = -EINVAL; |
1808 | goto _end; | |
1809 | } | |
1810 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1811 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1812 | (1<<SNDRV_TIMER_EVENT_START)| | |
1813 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1814 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1815 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1816 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1817 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1818 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1819 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1820 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1821 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1822 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1823 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1824 | err = -EINVAL; |
1825 | goto _end; | |
1826 | } | |
1827 | snd_timer_stop(tu->timeri); | |
1828 | spin_lock_irq(&t->lock); | |
1829 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1830 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1831 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1832 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1833 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1834 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1835 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1836 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1837 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1838 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1839 | if (params.queue_size > 0 && |
1840 | (unsigned int)tu->queue_size != params.queue_size) { | |
890e2cb5 TI |
1841 | err = realloc_user_queue(tu, params.queue_size); |
1842 | if (err < 0) | |
1843 | goto _end; | |
1da177e4 | 1844 | } |
d7f910bf | 1845 | spin_lock_irq(&tu->qlock); |
1da177e4 LT |
1846 | tu->qhead = tu->qtail = tu->qused = 0; |
1847 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1848 | if (tu->tread) { | |
53d2f744 | 1849 | struct snd_timer_tread tread; |
cec8f96e | 1850 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1851 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1852 | tread.tstamp.tv_sec = 0; | |
1853 | tread.tstamp.tv_nsec = 0; | |
1854 | tread.val = 0; | |
1855 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1856 | } else { | |
53d2f744 | 1857 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1858 | r->resolution = 0; |
1859 | r->ticks = 0; | |
1860 | tu->qused++; | |
1861 | tu->qtail++; | |
1862 | } | |
1da177e4 LT |
1863 | } |
1864 | tu->filter = params.filter; | |
1865 | tu->ticks = params.ticks; | |
d7f910bf | 1866 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1867 | err = 0; |
1868 | _end: | |
1869 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1870 | return -EFAULT; | |
1871 | return err; | |
1872 | } | |
1873 | ||
6b172a85 | 1874 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1875 | struct snd_timer_status __user *_status) |
1da177e4 | 1876 | { |
53d2f744 TI |
1877 | struct snd_timer_user *tu; |
1878 | struct snd_timer_status status; | |
6b172a85 | 1879 | |
1da177e4 | 1880 | tu = file->private_data; |
7c64ec34 CL |
1881 | if (!tu->timeri) |
1882 | return -EBADFD; | |
1da177e4 LT |
1883 | memset(&status, 0, sizeof(status)); |
1884 | status.tstamp = tu->tstamp; | |
1885 | status.resolution = snd_timer_resolution(tu->timeri); | |
1886 | status.lost = tu->timeri->lost; | |
1887 | status.overrun = tu->overrun; | |
1888 | spin_lock_irq(&tu->qlock); | |
1889 | status.queue = tu->qused; | |
1890 | spin_unlock_irq(&tu->qlock); | |
1891 | if (copy_to_user(_status, &status, sizeof(status))) | |
1892 | return -EFAULT; | |
1893 | return 0; | |
1894 | } | |
1895 | ||
1896 | static int snd_timer_user_start(struct file *file) | |
1897 | { | |
1898 | int err; | |
53d2f744 | 1899 | struct snd_timer_user *tu; |
6b172a85 | 1900 | |
1da177e4 | 1901 | tu = file->private_data; |
7c64ec34 CL |
1902 | if (!tu->timeri) |
1903 | return -EBADFD; | |
1da177e4 LT |
1904 | snd_timer_stop(tu->timeri); |
1905 | tu->timeri->lost = 0; | |
1906 | tu->last_resolution = 0; | |
5d704b0d TI |
1907 | err = snd_timer_start(tu->timeri, tu->ticks); |
1908 | if (err < 0) | |
1909 | return err; | |
1910 | return 0; | |
1da177e4 LT |
1911 | } |
1912 | ||
1913 | static int snd_timer_user_stop(struct file *file) | |
1914 | { | |
1915 | int err; | |
53d2f744 | 1916 | struct snd_timer_user *tu; |
6b172a85 | 1917 | |
1da177e4 | 1918 | tu = file->private_data; |
7c64ec34 CL |
1919 | if (!tu->timeri) |
1920 | return -EBADFD; | |
5d704b0d TI |
1921 | err = snd_timer_stop(tu->timeri); |
1922 | if (err < 0) | |
1923 | return err; | |
1924 | return 0; | |
1da177e4 LT |
1925 | } |
1926 | ||
1927 | static int snd_timer_user_continue(struct file *file) | |
1928 | { | |
1929 | int err; | |
53d2f744 | 1930 | struct snd_timer_user *tu; |
6b172a85 | 1931 | |
1da177e4 | 1932 | tu = file->private_data; |
7c64ec34 CL |
1933 | if (!tu->timeri) |
1934 | return -EBADFD; | |
9f8a7658 TI |
1935 | /* start timer instead of continue if it's not used before */ |
1936 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
1937 | return snd_timer_user_start(file); | |
1da177e4 | 1938 | tu->timeri->lost = 0; |
5d704b0d TI |
1939 | err = snd_timer_continue(tu->timeri); |
1940 | if (err < 0) | |
1941 | return err; | |
1942 | return 0; | |
1da177e4 LT |
1943 | } |
1944 | ||
15790a6b TI |
1945 | static int snd_timer_user_pause(struct file *file) |
1946 | { | |
1947 | int err; | |
53d2f744 | 1948 | struct snd_timer_user *tu; |
6b172a85 | 1949 | |
15790a6b | 1950 | tu = file->private_data; |
7c64ec34 CL |
1951 | if (!tu->timeri) |
1952 | return -EBADFD; | |
5d704b0d TI |
1953 | err = snd_timer_pause(tu->timeri); |
1954 | if (err < 0) | |
1955 | return err; | |
1956 | return 0; | |
15790a6b TI |
1957 | } |
1958 | ||
8c50b37c TI |
1959 | enum { |
1960 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1961 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1962 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1963 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1964 | }; | |
1965 | ||
af368027 | 1966 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1967 | unsigned long arg) |
1da177e4 | 1968 | { |
53d2f744 | 1969 | struct snd_timer_user *tu; |
1da177e4 LT |
1970 | void __user *argp = (void __user *)arg; |
1971 | int __user *p = argp; | |
6b172a85 | 1972 | |
1da177e4 LT |
1973 | tu = file->private_data; |
1974 | switch (cmd) { | |
1975 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1976 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1977 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1978 | return snd_timer_user_next_device(argp); | |
1979 | case SNDRV_TIMER_IOCTL_TREAD: | |
1980 | { | |
890e2cb5 | 1981 | int xarg, old_tread; |
6b172a85 | 1982 | |
af368027 | 1983 | if (tu->timeri) /* too late */ |
1da177e4 | 1984 | return -EBUSY; |
af368027 | 1985 | if (get_user(xarg, p)) |
1da177e4 | 1986 | return -EFAULT; |
890e2cb5 | 1987 | old_tread = tu->tread; |
1da177e4 | 1988 | tu->tread = xarg ? 1 : 0; |
890e2cb5 TI |
1989 | if (tu->tread != old_tread && |
1990 | realloc_user_queue(tu, tu->queue_size) < 0) { | |
1991 | tu->tread = old_tread; | |
1992 | return -ENOMEM; | |
1993 | } | |
1da177e4 LT |
1994 | return 0; |
1995 | } | |
1996 | case SNDRV_TIMER_IOCTL_GINFO: | |
1997 | return snd_timer_user_ginfo(file, argp); | |
1998 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
1999 | return snd_timer_user_gparams(file, argp); | |
2000 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
2001 | return snd_timer_user_gstatus(file, argp); | |
2002 | case SNDRV_TIMER_IOCTL_SELECT: | |
2003 | return snd_timer_user_tselect(file, argp); | |
2004 | case SNDRV_TIMER_IOCTL_INFO: | |
2005 | return snd_timer_user_info(file, argp); | |
2006 | case SNDRV_TIMER_IOCTL_PARAMS: | |
2007 | return snd_timer_user_params(file, argp); | |
2008 | case SNDRV_TIMER_IOCTL_STATUS: | |
2009 | return snd_timer_user_status(file, argp); | |
2010 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 2011 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
2012 | return snd_timer_user_start(file); |
2013 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 2014 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
2015 | return snd_timer_user_stop(file); |
2016 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 2017 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 2018 | return snd_timer_user_continue(file); |
15790a6b | 2019 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 2020 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 2021 | return snd_timer_user_pause(file); |
1da177e4 LT |
2022 | } |
2023 | return -ENOTTY; | |
2024 | } | |
2025 | ||
af368027 TI |
2026 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
2027 | unsigned long arg) | |
2028 | { | |
2029 | struct snd_timer_user *tu = file->private_data; | |
2030 | long ret; | |
2031 | ||
2032 | mutex_lock(&tu->ioctl_lock); | |
2033 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
2034 | mutex_unlock(&tu->ioctl_lock); | |
2035 | return ret; | |
2036 | } | |
2037 | ||
1da177e4 LT |
2038 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
2039 | { | |
53d2f744 | 2040 | struct snd_timer_user *tu; |
6b172a85 | 2041 | |
1da177e4 | 2042 | tu = file->private_data; |
60aa4924 | 2043 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
2044 | } |
2045 | ||
6b172a85 CL |
2046 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
2047 | size_t count, loff_t *offset) | |
1da177e4 | 2048 | { |
53d2f744 | 2049 | struct snd_timer_user *tu; |
1da177e4 | 2050 | long result = 0, unit; |
4dff5c7b | 2051 | int qhead; |
1da177e4 | 2052 | int err = 0; |
6b172a85 | 2053 | |
1da177e4 | 2054 | tu = file->private_data; |
53d2f744 | 2055 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
d11662f4 | 2056 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2057 | spin_lock_irq(&tu->qlock); |
2058 | while ((long)count - result >= unit) { | |
2059 | while (!tu->qused) { | |
ac6424b9 | 2060 | wait_queue_entry_t wait; |
1da177e4 LT |
2061 | |
2062 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
2063 | err = -EAGAIN; | |
4dff5c7b | 2064 | goto _error; |
1da177e4 LT |
2065 | } |
2066 | ||
2067 | set_current_state(TASK_INTERRUPTIBLE); | |
2068 | init_waitqueue_entry(&wait, current); | |
2069 | add_wait_queue(&tu->qchange_sleep, &wait); | |
2070 | ||
2071 | spin_unlock_irq(&tu->qlock); | |
d11662f4 | 2072 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 | 2073 | schedule(); |
d11662f4 | 2074 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2075 | spin_lock_irq(&tu->qlock); |
2076 | ||
2077 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
2078 | ||
230323da TI |
2079 | if (tu->disconnected) { |
2080 | err = -ENODEV; | |
4dff5c7b | 2081 | goto _error; |
230323da | 2082 | } |
1da177e4 LT |
2083 | if (signal_pending(current)) { |
2084 | err = -ERESTARTSYS; | |
4dff5c7b | 2085 | goto _error; |
1da177e4 LT |
2086 | } |
2087 | } | |
2088 | ||
4dff5c7b TI |
2089 | qhead = tu->qhead++; |
2090 | tu->qhead %= tu->queue_size; | |
3fa6993f | 2091 | tu->qused--; |
1da177e4 | 2092 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2093 | |
2094 | if (tu->tread) { | |
4dff5c7b TI |
2095 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
2096 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 2097 | err = -EFAULT; |
1da177e4 | 2098 | } else { |
4dff5c7b TI |
2099 | if (copy_to_user(buffer, &tu->queue[qhead], |
2100 | sizeof(struct snd_timer_read))) | |
1da177e4 | 2101 | err = -EFAULT; |
1da177e4 LT |
2102 | } |
2103 | ||
1da177e4 | 2104 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
2105 | if (err < 0) |
2106 | goto _error; | |
2107 | result += unit; | |
2108 | buffer += unit; | |
1da177e4 | 2109 | } |
1da177e4 | 2110 | _error: |
4dff5c7b | 2111 | spin_unlock_irq(&tu->qlock); |
d11662f4 | 2112 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
2113 | return result > 0 ? result : err; |
2114 | } | |
2115 | ||
680ef72a | 2116 | static __poll_t snd_timer_user_poll(struct file *file, poll_table * wait) |
1da177e4 | 2117 | { |
680ef72a | 2118 | __poll_t mask; |
53d2f744 | 2119 | struct snd_timer_user *tu; |
1da177e4 LT |
2120 | |
2121 | tu = file->private_data; | |
2122 | ||
2123 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 2124 | |
1da177e4 | 2125 | mask = 0; |
d7f910bf | 2126 | spin_lock_irq(&tu->qlock); |
1da177e4 | 2127 | if (tu->qused) |
a9a08845 | 2128 | mask |= EPOLLIN | EPOLLRDNORM; |
230323da | 2129 | if (tu->disconnected) |
a9a08845 | 2130 | mask |= EPOLLERR; |
d7f910bf | 2131 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2132 | |
2133 | return mask; | |
2134 | } | |
2135 | ||
2136 | #ifdef CONFIG_COMPAT | |
2137 | #include "timer_compat.c" | |
2138 | #else | |
2139 | #define snd_timer_user_ioctl_compat NULL | |
2140 | #endif | |
2141 | ||
9c2e08c5 | 2142 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2143 | { |
2144 | .owner = THIS_MODULE, | |
2145 | .read = snd_timer_user_read, | |
2146 | .open = snd_timer_user_open, | |
2147 | .release = snd_timer_user_release, | |
02f4865f | 2148 | .llseek = no_llseek, |
1da177e4 LT |
2149 | .poll = snd_timer_user_poll, |
2150 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2151 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2152 | .fasync = snd_timer_user_fasync, | |
2153 | }; | |
2154 | ||
7c35860d TI |
2155 | /* unregister the system timer */ |
2156 | static void snd_timer_free_all(void) | |
2157 | { | |
2158 | struct snd_timer *timer, *n; | |
2159 | ||
2160 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2161 | snd_timer_free(timer); | |
2162 | } | |
2163 | ||
89da061f TI |
2164 | static struct device timer_dev; |
2165 | ||
1da177e4 LT |
2166 | /* |
2167 | * ENTRY functions | |
2168 | */ | |
2169 | ||
1da177e4 LT |
2170 | static int __init alsa_timer_init(void) |
2171 | { | |
2172 | int err; | |
1da177e4 | 2173 | |
89da061f TI |
2174 | snd_device_initialize(&timer_dev, NULL); |
2175 | dev_set_name(&timer_dev, "timer"); | |
2176 | ||
1da177e4 | 2177 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2178 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2179 | "system timer"); | |
1da177e4 | 2180 | #endif |
e28563cc | 2181 | |
7c35860d TI |
2182 | err = snd_timer_register_system(); |
2183 | if (err < 0) { | |
cf74dcf3 | 2184 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
1ae0e4ce | 2185 | goto put_timer; |
7c35860d TI |
2186 | } |
2187 | ||
40a4b263 TI |
2188 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2189 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2190 | if (err < 0) { |
cf74dcf3 | 2191 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2192 | snd_timer_free_all(); |
1ae0e4ce | 2193 | goto put_timer; |
7c35860d TI |
2194 | } |
2195 | ||
e28563cc | 2196 | snd_timer_proc_init(); |
1da177e4 | 2197 | return 0; |
1ae0e4ce ME |
2198 | |
2199 | put_timer: | |
2200 | put_device(&timer_dev); | |
2201 | return err; | |
1da177e4 LT |
2202 | } |
2203 | ||
2204 | static void __exit alsa_timer_exit(void) | |
2205 | { | |
40a4b263 | 2206 | snd_unregister_device(&timer_dev); |
7c35860d | 2207 | snd_timer_free_all(); |
89da061f | 2208 | put_device(&timer_dev); |
e28563cc | 2209 | snd_timer_proc_done(); |
1da177e4 LT |
2210 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2211 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2212 | #endif | |
2213 | } | |
2214 | ||
2215 | module_init(alsa_timer_init) | |
2216 | module_exit(alsa_timer_exit) |