Commit | Line | Data |
---|---|---|
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 | ||
fdea53fe TI |
77 | #define MAX_SLAVE_INSTANCES 1000 |
78 | static int num_slaves; | |
79 | ||
1a60d4c5 | 80 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 81 | |
53d2f744 TI |
82 | static int snd_timer_free(struct snd_timer *timer); |
83 | static int snd_timer_dev_free(struct snd_device *device); | |
84 | static int snd_timer_dev_register(struct snd_device *device); | |
c461482c | 85 | static int snd_timer_dev_disconnect(struct snd_device *device); |
1da177e4 | 86 | |
53d2f744 | 87 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
1da177e4 LT |
88 | |
89 | /* | |
90 | * create a timer instance with the given owner string. | |
1da177e4 | 91 | */ |
6a34367e | 92 | struct snd_timer_instance *snd_timer_instance_new(const char *owner) |
1da177e4 | 93 | { |
53d2f744 | 94 | struct snd_timer_instance *timeri; |
6a34367e | 95 | |
ca2c0966 | 96 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
1da177e4 LT |
97 | if (timeri == NULL) |
98 | return NULL; | |
543537bd | 99 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
1da177e4 LT |
100 | if (! timeri->owner) { |
101 | kfree(timeri); | |
102 | return NULL; | |
103 | } | |
104 | INIT_LIST_HEAD(&timeri->open_list); | |
105 | INIT_LIST_HEAD(&timeri->active_list); | |
106 | INIT_LIST_HEAD(&timeri->ack_list); | |
107 | INIT_LIST_HEAD(&timeri->slave_list_head); | |
108 | INIT_LIST_HEAD(&timeri->slave_active_head); | |
109 | ||
6a34367e TI |
110 | return timeri; |
111 | } | |
112 | EXPORT_SYMBOL(snd_timer_instance_new); | |
113 | ||
114 | void snd_timer_instance_free(struct snd_timer_instance *timeri) | |
115 | { | |
116 | if (timeri) { | |
117 | if (timeri->private_free) | |
118 | timeri->private_free(timeri); | |
1da177e4 LT |
119 | kfree(timeri->owner); |
120 | kfree(timeri); | |
1da177e4 | 121 | } |
1da177e4 | 122 | } |
6a34367e | 123 | EXPORT_SYMBOL(snd_timer_instance_free); |
1da177e4 LT |
124 | |
125 | /* | |
126 | * find a timer instance from the given timer id | |
127 | */ | |
53d2f744 | 128 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
1da177e4 | 129 | { |
53d2f744 | 130 | struct snd_timer *timer = NULL; |
1da177e4 | 131 | |
9244b2c3 | 132 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
1da177e4 LT |
133 | if (timer->tmr_class != tid->dev_class) |
134 | continue; | |
135 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || | |
136 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && | |
137 | (timer->card == NULL || | |
138 | timer->card->number != tid->card)) | |
139 | continue; | |
140 | if (timer->tmr_device != tid->device) | |
141 | continue; | |
142 | if (timer->tmr_subdevice != tid->subdevice) | |
143 | continue; | |
144 | return timer; | |
145 | } | |
146 | return NULL; | |
147 | } | |
148 | ||
ee2da997 | 149 | #ifdef CONFIG_MODULES |
1da177e4 | 150 | |
53d2f744 | 151 | static void snd_timer_request(struct snd_timer_id *tid) |
1da177e4 | 152 | { |
1da177e4 LT |
153 | switch (tid->dev_class) { |
154 | case SNDRV_TIMER_CLASS_GLOBAL: | |
155 | if (tid->device < timer_limit) | |
156 | request_module("snd-timer-%i", tid->device); | |
157 | break; | |
158 | case SNDRV_TIMER_CLASS_CARD: | |
159 | case SNDRV_TIMER_CLASS_PCM: | |
160 | if (tid->card < snd_ecards_limit) | |
161 | request_module("snd-card-%i", tid->card); | |
162 | break; | |
163 | default: | |
164 | break; | |
165 | } | |
166 | } | |
167 | ||
168 | #endif | |
169 | ||
ebfc6de2 TI |
170 | /* move the slave if it belongs to the master; return 1 if match */ |
171 | static int check_matching_master_slave(struct snd_timer_instance *master, | |
172 | struct snd_timer_instance *slave) | |
173 | { | |
174 | if (slave->slave_class != master->slave_class || | |
175 | slave->slave_id != master->slave_id) | |
176 | return 0; | |
177 | if (master->timer->num_instances >= master->timer->max_instances) | |
178 | return -EBUSY; | |
179 | list_move_tail(&slave->open_list, &master->slave_list_head); | |
180 | master->timer->num_instances++; | |
181 | spin_lock_irq(&slave_active_lock); | |
182 | spin_lock(&master->timer->lock); | |
183 | slave->master = master; | |
184 | slave->timer = master->timer; | |
185 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) | |
186 | list_add_tail(&slave->active_list, &master->slave_active_head); | |
187 | spin_unlock(&master->timer->lock); | |
188 | spin_unlock_irq(&slave_active_lock); | |
189 | return 1; | |
190 | } | |
191 | ||
1da177e4 LT |
192 | /* |
193 | * look for a master instance matching with the slave id of the given slave. | |
194 | * when found, relink the open_link of the slave. | |
195 | * | |
196 | * call this with register_mutex down. | |
197 | */ | |
9b7d869e | 198 | static int snd_timer_check_slave(struct snd_timer_instance *slave) |
1da177e4 | 199 | { |
53d2f744 TI |
200 | struct snd_timer *timer; |
201 | struct snd_timer_instance *master; | |
ebfc6de2 | 202 | int err = 0; |
1da177e4 LT |
203 | |
204 | /* FIXME: it's really dumb to look up all entries.. */ | |
9244b2c3 JB |
205 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
206 | list_for_each_entry(master, &timer->open_list_head, open_list) { | |
ebfc6de2 TI |
207 | err = check_matching_master_slave(master, slave); |
208 | if (err != 0) /* match found or error */ | |
209 | goto out; | |
1da177e4 LT |
210 | } |
211 | } | |
ebfc6de2 TI |
212 | out: |
213 | return err < 0 ? err : 0; | |
1da177e4 LT |
214 | } |
215 | ||
216 | /* | |
217 | * look for slave instances matching with the slave id of the given master. | |
218 | * when found, relink the open_link of slaves. | |
219 | * | |
220 | * call this with register_mutex down. | |
221 | */ | |
9b7d869e | 222 | static int snd_timer_check_master(struct snd_timer_instance *master) |
1da177e4 | 223 | { |
9244b2c3 | 224 | struct snd_timer_instance *slave, *tmp; |
ebfc6de2 | 225 | int err = 0; |
1da177e4 LT |
226 | |
227 | /* check all pending slaves */ | |
9244b2c3 | 228 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
ebfc6de2 TI |
229 | err = check_matching_master_slave(master, slave); |
230 | if (err < 0) | |
231 | break; | |
1da177e4 | 232 | } |
ebfc6de2 | 233 | return err < 0 ? err : 0; |
1da177e4 LT |
234 | } |
235 | ||
33bbb8a0 TI |
236 | static void snd_timer_close_locked(struct snd_timer_instance *timeri, |
237 | struct device **card_devp_to_put); | |
9b7d869e | 238 | |
1da177e4 LT |
239 | /* |
240 | * open a timer instance | |
241 | * when opening a master, the slave id must be here given. | |
242 | */ | |
6a34367e TI |
243 | int snd_timer_open(struct snd_timer_instance *timeri, |
244 | struct snd_timer_id *tid, | |
1da177e4 LT |
245 | unsigned int slave_id) |
246 | { | |
53d2f744 | 247 | struct snd_timer *timer; |
a3933186 | 248 | struct device *card_dev_to_put = NULL; |
9b7d869e | 249 | int err; |
6b172a85 | 250 | |
41672c0c | 251 | mutex_lock(®ister_mutex); |
1da177e4 LT |
252 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
253 | /* open a slave instance */ | |
254 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || | |
255 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { | |
cf74dcf3 TI |
256 | pr_debug("ALSA: timer: invalid slave class %i\n", |
257 | tid->dev_sclass); | |
41672c0c TI |
258 | err = -EINVAL; |
259 | goto unlock; | |
1da177e4 | 260 | } |
fdea53fe TI |
261 | if (num_slaves >= MAX_SLAVE_INSTANCES) { |
262 | err = -EBUSY; | |
263 | goto unlock; | |
264 | } | |
1da177e4 LT |
265 | timeri->slave_class = tid->dev_sclass; |
266 | timeri->slave_id = tid->device; | |
267 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; | |
268 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); | |
fdea53fe | 269 | num_slaves++; |
9b7d869e | 270 | err = snd_timer_check_slave(timeri); |
6a34367e TI |
271 | if (err < 0) |
272 | goto close; | |
1da177e4 LT |
273 | } |
274 | ||
275 | /* open a master instance */ | |
1da177e4 | 276 | timer = snd_timer_find(tid); |
ee2da997 JB |
277 | #ifdef CONFIG_MODULES |
278 | if (!timer) { | |
1a60d4c5 | 279 | mutex_unlock(®ister_mutex); |
1da177e4 | 280 | snd_timer_request(tid); |
1a60d4c5 | 281 | mutex_lock(®ister_mutex); |
1da177e4 LT |
282 | timer = snd_timer_find(tid); |
283 | } | |
284 | #endif | |
2fd43d11 | 285 | if (!timer) { |
41672c0c TI |
286 | err = -ENODEV; |
287 | goto unlock; | |
1da177e4 | 288 | } |
2fd43d11 | 289 | if (!list_empty(&timer->open_list_head)) { |
e7af6307 TI |
290 | struct snd_timer_instance *t = |
291 | list_entry(timer->open_list_head.next, | |
53d2f744 | 292 | struct snd_timer_instance, open_list); |
e7af6307 | 293 | if (t->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
41672c0c | 294 | err = -EBUSY; |
41672c0c | 295 | goto unlock; |
2fd43d11 CL |
296 | } |
297 | } | |
9b7d869e | 298 | if (timer->num_instances >= timer->max_instances) { |
41672c0c TI |
299 | err = -EBUSY; |
300 | goto unlock; | |
9b7d869e | 301 | } |
6a34367e TI |
302 | if (!try_module_get(timer->module)) { |
303 | err = -EBUSY; | |
41672c0c | 304 | goto unlock; |
2fd43d11 | 305 | } |
230323da | 306 | /* take a card refcount for safe disconnection */ |
6a34367e | 307 | if (timer->card) { |
230323da | 308 | get_device(&timer->card->card_dev); |
6a34367e TI |
309 | card_dev_to_put = &timer->card->card_dev; |
310 | } | |
8ddc0563 VN |
311 | |
312 | if (list_empty(&timer->open_list_head) && timer->hw.open) { | |
41672c0c | 313 | err = timer->hw.open(timer); |
8ddc0563 | 314 | if (err) { |
8ddc0563 | 315 | module_put(timer->module); |
41672c0c | 316 | goto unlock; |
8ddc0563 VN |
317 | } |
318 | } | |
319 | ||
6a34367e TI |
320 | timeri->timer = timer; |
321 | timeri->slave_class = tid->dev_sclass; | |
322 | timeri->slave_id = slave_id; | |
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); | |
6a34367e TI |
327 | close: |
328 | if (err < 0) | |
a3933186 | 329 | snd_timer_close_locked(timeri, &card_dev_to_put); |
41672c0c TI |
330 | |
331 | unlock: | |
1a60d4c5 | 332 | mutex_unlock(®ister_mutex); |
a3933186 | 333 | /* put_device() is called after unlock for avoiding deadlock */ |
6a34367e | 334 | if (err < 0 && card_dev_to_put) |
a3933186 | 335 | put_device(card_dev_to_put); |
9b7d869e | 336 | return err; |
1da177e4 | 337 | } |
98856392 | 338 | EXPORT_SYMBOL(snd_timer_open); |
1da177e4 | 339 | |
1da177e4 LT |
340 | /* |
341 | * close a timer instance | |
9b7d869e | 342 | * call this with register_mutex down. |
1da177e4 | 343 | */ |
33bbb8a0 TI |
344 | static void snd_timer_close_locked(struct snd_timer_instance *timeri, |
345 | struct device **card_devp_to_put) | |
1da177e4 | 346 | { |
fe1b26c9 | 347 | struct snd_timer *timer = timeri->timer; |
9244b2c3 | 348 | struct snd_timer_instance *slave, *tmp; |
1da177e4 | 349 | |
fe1b26c9 TI |
350 | if (timer) { |
351 | spin_lock_irq(&timer->lock); | |
352 | timeri->flags |= SNDRV_TIMER_IFLG_DEAD; | |
353 | spin_unlock_irq(&timer->lock); | |
354 | } | |
355 | ||
6a34367e TI |
356 | if (!list_empty(&timeri->open_list)) { |
357 | list_del_init(&timeri->open_list); | |
358 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
359 | num_slaves--; | |
360 | } | |
9984d1b5 | 361 | |
1da177e4 LT |
362 | /* force to stop the timer */ |
363 | snd_timer_stop(timeri); | |
364 | ||
9984d1b5 | 365 | if (timer) { |
9b7d869e | 366 | timer->num_instances--; |
1da177e4 LT |
367 | /* wait, until the active callback is finished */ |
368 | spin_lock_irq(&timer->lock); | |
369 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { | |
370 | spin_unlock_irq(&timer->lock); | |
371 | udelay(10); | |
372 | spin_lock_irq(&timer->lock); | |
373 | } | |
374 | spin_unlock_irq(&timer->lock); | |
9984d1b5 | 375 | |
1da177e4 | 376 | /* remove slave links */ |
b5a663aa TI |
377 | spin_lock_irq(&slave_active_lock); |
378 | spin_lock(&timer->lock); | |
6a34367e | 379 | timeri->timer = NULL; |
9244b2c3 JB |
380 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
381 | open_list) { | |
9244b2c3 | 382 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
9b7d869e | 383 | timer->num_instances--; |
1da177e4 LT |
384 | slave->master = NULL; |
385 | slave->timer = NULL; | |
b5a663aa TI |
386 | list_del_init(&slave->ack_list); |
387 | list_del_init(&slave->active_list); | |
1da177e4 | 388 | } |
b5a663aa TI |
389 | spin_unlock(&timer->lock); |
390 | spin_unlock_irq(&slave_active_lock); | |
9984d1b5 TI |
391 | |
392 | /* slave doesn't need to release timer resources below */ | |
393 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
394 | timer = NULL; | |
1da177e4 | 395 | } |
9984d1b5 | 396 | |
9984d1b5 TI |
397 | if (timer) { |
398 | if (list_empty(&timer->open_list_head) && timer->hw.close) | |
399 | timer->hw.close(timer); | |
400 | /* release a card refcount for safe disconnection */ | |
401 | if (timer->card) | |
a3933186 | 402 | *card_devp_to_put = &timer->card->card_dev; |
de24214d | 403 | module_put(timer->module); |
9984d1b5 | 404 | } |
1da177e4 | 405 | } |
9b7d869e TI |
406 | |
407 | /* | |
408 | * close a timer instance | |
409 | */ | |
33bbb8a0 | 410 | void snd_timer_close(struct snd_timer_instance *timeri) |
9b7d869e | 411 | { |
a3933186 | 412 | struct device *card_dev_to_put = NULL; |
9b7d869e TI |
413 | |
414 | if (snd_BUG_ON(!timeri)) | |
33bbb8a0 | 415 | return; |
9b7d869e TI |
416 | |
417 | mutex_lock(®ister_mutex); | |
33bbb8a0 | 418 | snd_timer_close_locked(timeri, &card_dev_to_put); |
9b7d869e | 419 | mutex_unlock(®ister_mutex); |
a3933186 TI |
420 | /* put_device() is called after unlock for avoiding deadlock */ |
421 | if (card_dev_to_put) | |
422 | put_device(card_dev_to_put); | |
9b7d869e | 423 | } |
98856392 | 424 | EXPORT_SYMBOL(snd_timer_close); |
1da177e4 | 425 | |
fdcb5761 TI |
426 | static unsigned long snd_timer_hw_resolution(struct snd_timer *timer) |
427 | { | |
428 | if (timer->hw.c_resolution) | |
429 | return timer->hw.c_resolution(timer); | |
430 | else | |
431 | return timer->hw.resolution; | |
432 | } | |
433 | ||
53d2f744 | 434 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
1da177e4 | 435 | { |
53d2f744 | 436 | struct snd_timer * timer; |
9d4d207d TI |
437 | unsigned long ret = 0; |
438 | unsigned long flags; | |
1da177e4 LT |
439 | |
440 | if (timeri == NULL) | |
441 | return 0; | |
dd1f7ab8 | 442 | timer = timeri->timer; |
9d4d207d TI |
443 | if (timer) { |
444 | spin_lock_irqsave(&timer->lock, flags); | |
445 | ret = snd_timer_hw_resolution(timer); | |
446 | spin_unlock_irqrestore(&timer->lock, flags); | |
447 | } | |
448 | return ret; | |
1da177e4 | 449 | } |
98856392 | 450 | EXPORT_SYMBOL(snd_timer_resolution); |
1da177e4 | 451 | |
53d2f744 | 452 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
1da177e4 | 453 | { |
9d4d207d | 454 | struct snd_timer *timer = ti->timer; |
1da177e4 | 455 | unsigned long resolution = 0; |
53d2f744 | 456 | struct snd_timer_instance *ts; |
1da177e4 LT |
457 | struct timespec tstamp; |
458 | ||
b751eef1 | 459 | if (timer_tstamp_monotonic) |
26204e04 | 460 | ktime_get_ts(&tstamp); |
b751eef1 JK |
461 | else |
462 | getnstimeofday(&tstamp); | |
7eaa943c TI |
463 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
464 | event > SNDRV_TIMER_EVENT_PAUSE)) | |
465 | return; | |
9d4d207d TI |
466 | if (timer && |
467 | (event == SNDRV_TIMER_EVENT_START || | |
468 | event == SNDRV_TIMER_EVENT_CONTINUE)) | |
469 | resolution = snd_timer_hw_resolution(timer); | |
1da177e4 | 470 | if (ti->ccallback) |
b30477d5 | 471 | ti->ccallback(ti, event, &tstamp, resolution); |
1da177e4 LT |
472 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
473 | return; | |
1da177e4 LT |
474 | if (timer == NULL) |
475 | return; | |
476 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
477 | return; | |
9244b2c3 | 478 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 | 479 | if (ts->ccallback) |
117159f0 | 480 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
1da177e4 LT |
481 | } |
482 | ||
f65e0d29 TI |
483 | /* start/continue a master timer */ |
484 | static int snd_timer_start1(struct snd_timer_instance *timeri, | |
485 | bool start, unsigned long ticks) | |
1da177e4 | 486 | { |
f65e0d29 TI |
487 | struct snd_timer *timer; |
488 | int result; | |
489 | unsigned long flags; | |
490 | ||
491 | timer = timeri->timer; | |
492 | if (!timer) | |
493 | return -EINVAL; | |
494 | ||
495 | spin_lock_irqsave(&timer->lock, flags); | |
fe1b26c9 TI |
496 | if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { |
497 | result = -EINVAL; | |
498 | goto unlock; | |
499 | } | |
f65e0d29 TI |
500 | if (timer->card && timer->card->shutdown) { |
501 | result = -ENODEV; | |
502 | goto unlock; | |
503 | } | |
504 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | | |
505 | SNDRV_TIMER_IFLG_START)) { | |
506 | result = -EBUSY; | |
507 | goto unlock; | |
508 | } | |
509 | ||
510 | if (start) | |
511 | timeri->ticks = timeri->cticks = ticks; | |
512 | else if (!timeri->cticks) | |
513 | timeri->cticks = 1; | |
514 | timeri->pticks = 0; | |
515 | ||
5b7c757d | 516 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
1da177e4 LT |
517 | if (timer->running) { |
518 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
519 | goto __start_now; | |
520 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; | |
521 | timeri->flags |= SNDRV_TIMER_IFLG_START; | |
f65e0d29 | 522 | result = 1; /* delayed start */ |
1da177e4 | 523 | } else { |
f65e0d29 TI |
524 | if (start) |
525 | timer->sticks = ticks; | |
1da177e4 LT |
526 | timer->hw.start(timer); |
527 | __start_now: | |
528 | timer->running++; | |
529 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
f65e0d29 | 530 | result = 0; |
1da177e4 | 531 | } |
f65e0d29 TI |
532 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
533 | SNDRV_TIMER_EVENT_CONTINUE); | |
534 | unlock: | |
535 | spin_unlock_irqrestore(&timer->lock, flags); | |
536 | return result; | |
1da177e4 LT |
537 | } |
538 | ||
f65e0d29 TI |
539 | /* start/continue a slave timer */ |
540 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, | |
541 | bool start) | |
1da177e4 LT |
542 | { |
543 | unsigned long flags; | |
fe1b26c9 | 544 | int err; |
1da177e4 LT |
545 | |
546 | spin_lock_irqsave(&slave_active_lock, flags); | |
fe1b26c9 TI |
547 | if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { |
548 | err = -EINVAL; | |
549 | goto unlock; | |
550 | } | |
f784beb7 | 551 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
fe1b26c9 TI |
552 | err = -EBUSY; |
553 | goto unlock; | |
f784beb7 | 554 | } |
1da177e4 | 555 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
b5a663aa TI |
556 | if (timeri->master && timeri->timer) { |
557 | spin_lock(&timeri->timer->lock); | |
6b172a85 CL |
558 | list_add_tail(&timeri->active_list, |
559 | &timeri->master->slave_active_head); | |
f65e0d29 TI |
560 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
561 | SNDRV_TIMER_EVENT_CONTINUE); | |
b5a663aa TI |
562 | spin_unlock(&timeri->timer->lock); |
563 | } | |
fe1b26c9 TI |
564 | err = 1; /* delayed start */ |
565 | unlock: | |
1da177e4 | 566 | spin_unlock_irqrestore(&slave_active_lock, flags); |
fe1b26c9 | 567 | return err; |
1da177e4 LT |
568 | } |
569 | ||
f65e0d29 TI |
570 | /* stop/pause a master timer */ |
571 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) | |
1da177e4 | 572 | { |
53d2f744 | 573 | struct snd_timer *timer; |
f65e0d29 | 574 | int result = 0; |
1da177e4 LT |
575 | unsigned long flags; |
576 | ||
1da177e4 LT |
577 | timer = timeri->timer; |
578 | if (!timer) | |
579 | return -EINVAL; | |
580 | spin_lock_irqsave(&timer->lock, flags); | |
f784beb7 TI |
581 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
582 | SNDRV_TIMER_IFLG_START))) { | |
f65e0d29 TI |
583 | result = -EBUSY; |
584 | goto unlock; | |
f784beb7 | 585 | } |
1da177e4 LT |
586 | list_del_init(&timeri->ack_list); |
587 | list_del_init(&timeri->active_list); | |
f65e0d29 TI |
588 | if (timer->card && timer->card->shutdown) |
589 | goto unlock; | |
590 | if (stop) { | |
591 | timeri->cticks = timeri->ticks; | |
592 | timeri->pticks = 0; | |
230323da | 593 | } |
1da177e4 LT |
594 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
595 | !(--timer->running)) { | |
596 | timer->hw.stop(timer); | |
597 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { | |
598 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
599 | snd_timer_reschedule(timer, 0); | |
600 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { | |
601 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
602 | timer->hw.start(timer); | |
603 | } | |
604 | } | |
605 | } | |
c3b16813 | 606 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
9f8a7658 TI |
607 | if (stop) |
608 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; | |
609 | else | |
610 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; | |
f65e0d29 | 611 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
3ae18097 | 612 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 | 613 | unlock: |
1da177e4 | 614 | spin_unlock_irqrestore(&timer->lock, flags); |
f65e0d29 TI |
615 | return result; |
616 | } | |
617 | ||
618 | /* stop/pause a slave timer */ | |
619 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) | |
620 | { | |
621 | unsigned long flags; | |
622 | ||
623 | spin_lock_irqsave(&slave_active_lock, flags); | |
624 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { | |
625 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
626 | return -EBUSY; | |
627 | } | |
628 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
629 | if (timeri->timer) { | |
630 | spin_lock(&timeri->timer->lock); | |
631 | list_del_init(&timeri->ack_list); | |
632 | list_del_init(&timeri->active_list); | |
633 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : | |
3ae18097 | 634 | SNDRV_TIMER_EVENT_PAUSE); |
f65e0d29 TI |
635 | spin_unlock(&timeri->timer->lock); |
636 | } | |
637 | spin_unlock_irqrestore(&slave_active_lock, flags); | |
1da177e4 LT |
638 | return 0; |
639 | } | |
640 | ||
f65e0d29 TI |
641 | /* |
642 | * start the timer instance | |
643 | */ | |
644 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) | |
645 | { | |
646 | if (timeri == NULL || ticks < 1) | |
647 | return -EINVAL; | |
648 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) | |
649 | return snd_timer_start_slave(timeri, true); | |
650 | else | |
651 | return snd_timer_start1(timeri, true, ticks); | |
652 | } | |
98856392 | 653 | EXPORT_SYMBOL(snd_timer_start); |
f65e0d29 | 654 | |
1da177e4 LT |
655 | /* |
656 | * stop the timer instance. | |
657 | * | |
658 | * do not call this from the timer callback! | |
659 | */ | |
53d2f744 | 660 | int snd_timer_stop(struct snd_timer_instance *timeri) |
1da177e4 | 661 | { |
f65e0d29 TI |
662 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
663 | return snd_timer_stop_slave(timeri, true); | |
664 | else | |
665 | return snd_timer_stop1(timeri, true); | |
1da177e4 | 666 | } |
98856392 | 667 | EXPORT_SYMBOL(snd_timer_stop); |
1da177e4 LT |
668 | |
669 | /* | |
670 | * start again.. the tick is kept. | |
671 | */ | |
53d2f744 | 672 | int snd_timer_continue(struct snd_timer_instance *timeri) |
1da177e4 | 673 | { |
9f8a7658 TI |
674 | /* timer can continue only after pause */ |
675 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
676 | return -EINVAL; | |
677 | ||
1da177e4 | 678 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
f65e0d29 TI |
679 | return snd_timer_start_slave(timeri, false); |
680 | else | |
681 | return snd_timer_start1(timeri, false, 0); | |
1da177e4 | 682 | } |
98856392 | 683 | EXPORT_SYMBOL(snd_timer_continue); |
1da177e4 LT |
684 | |
685 | /* | |
686 | * pause.. remember the ticks left | |
687 | */ | |
53d2f744 | 688 | int snd_timer_pause(struct snd_timer_instance * timeri) |
1da177e4 | 689 | { |
f65e0d29 TI |
690 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
691 | return snd_timer_stop_slave(timeri, false); | |
692 | else | |
693 | return snd_timer_stop1(timeri, false); | |
1da177e4 | 694 | } |
98856392 | 695 | EXPORT_SYMBOL(snd_timer_pause); |
1da177e4 LT |
696 | |
697 | /* | |
698 | * reschedule the timer | |
699 | * | |
700 | * start pending instances and check the scheduling ticks. | |
701 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. | |
702 | */ | |
53d2f744 | 703 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 704 | { |
53d2f744 | 705 | struct snd_timer_instance *ti; |
1da177e4 | 706 | unsigned long ticks = ~0UL; |
1da177e4 | 707 | |
9244b2c3 | 708 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
709 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
710 | ti->flags &= ~SNDRV_TIMER_IFLG_START; | |
711 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; | |
712 | timer->running++; | |
713 | } | |
714 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { | |
715 | if (ticks > ti->cticks) | |
716 | ticks = ti->cticks; | |
717 | } | |
718 | } | |
719 | if (ticks == ~0UL) { | |
720 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; | |
721 | return; | |
722 | } | |
723 | if (ticks > timer->hw.ticks) | |
724 | ticks = timer->hw.ticks; | |
725 | if (ticks_left != ticks) | |
726 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
727 | timer->sticks = ticks; | |
728 | } | |
729 | ||
8748b850 TI |
730 | /* call callbacks in timer ack list */ |
731 | static void snd_timer_process_callbacks(struct snd_timer *timer, | |
732 | struct list_head *head) | |
1da177e4 | 733 | { |
53d2f744 | 734 | struct snd_timer_instance *ti; |
1da177e4 | 735 | unsigned long resolution, ticks; |
230323da | 736 | |
8748b850 TI |
737 | while (!list_empty(head)) { |
738 | ti = list_first_entry(head, struct snd_timer_instance, | |
739 | ack_list); | |
1da177e4 | 740 | |
df55531b TI |
741 | /* remove from ack_list and make empty */ |
742 | list_del_init(&ti->ack_list); | |
743 | ||
fe1b26c9 TI |
744 | if (!(ti->flags & SNDRV_TIMER_IFLG_DEAD)) { |
745 | ticks = ti->pticks; | |
746 | ti->pticks = 0; | |
747 | resolution = ti->resolution; | |
df55531b | 748 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; |
fe1b26c9 TI |
749 | spin_unlock(&timer->lock); |
750 | if (ti->callback) | |
751 | ti->callback(ti, resolution, ticks); | |
752 | spin_lock(&timer->lock); | |
df55531b | 753 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; |
fe1b26c9 | 754 | } |
1da177e4 | 755 | } |
8748b850 TI |
756 | } |
757 | ||
7bb4a8a2 TI |
758 | /* clear pending instances from ack list */ |
759 | static void snd_timer_clear_callbacks(struct snd_timer *timer, | |
760 | struct list_head *head) | |
761 | { | |
762 | unsigned long flags; | |
763 | ||
764 | spin_lock_irqsave(&timer->lock, flags); | |
765 | while (!list_empty(head)) | |
766 | list_del_init(head->next); | |
767 | spin_unlock_irqrestore(&timer->lock, flags); | |
768 | } | |
769 | ||
1da177e4 LT |
770 | /* |
771 | * timer tasklet | |
772 | * | |
773 | */ | |
774 | static void snd_timer_tasklet(unsigned long arg) | |
775 | { | |
53d2f744 | 776 | struct snd_timer *timer = (struct snd_timer *) arg; |
2999ff5b | 777 | unsigned long flags; |
1da177e4 | 778 | |
7bb4a8a2 TI |
779 | if (timer->card && timer->card->shutdown) { |
780 | snd_timer_clear_callbacks(timer, &timer->sack_list_head); | |
230323da | 781 | return; |
7bb4a8a2 | 782 | } |
230323da | 783 | |
2999ff5b | 784 | spin_lock_irqsave(&timer->lock, flags); |
8748b850 | 785 | snd_timer_process_callbacks(timer, &timer->sack_list_head); |
2999ff5b | 786 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
787 | } |
788 | ||
789 | /* | |
790 | * timer interrupt | |
791 | * | |
792 | * ticks_left is usually equal to timer->sticks. | |
793 | * | |
794 | */ | |
53d2f744 | 795 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
1da177e4 | 796 | { |
9244b2c3 | 797 | struct snd_timer_instance *ti, *ts, *tmp; |
8748b850 TI |
798 | unsigned long resolution; |
799 | struct list_head *ack_list_head; | |
b32425ac | 800 | unsigned long flags; |
1da177e4 LT |
801 | int use_tasklet = 0; |
802 | ||
803 | if (timer == NULL) | |
804 | return; | |
805 | ||
7bb4a8a2 TI |
806 | if (timer->card && timer->card->shutdown) { |
807 | snd_timer_clear_callbacks(timer, &timer->ack_list_head); | |
230323da | 808 | return; |
7bb4a8a2 | 809 | } |
230323da | 810 | |
b32425ac | 811 | spin_lock_irqsave(&timer->lock, flags); |
1da177e4 LT |
812 | |
813 | /* remember the current resolution */ | |
fdcb5761 | 814 | resolution = snd_timer_hw_resolution(timer); |
1da177e4 LT |
815 | |
816 | /* loop for all active instances | |
9244b2c3 | 817 | * Here we cannot use list_for_each_entry because the active_list of a |
6b172a85 CL |
818 | * processed instance is relinked to done_list_head before the callback |
819 | * is called. | |
1da177e4 | 820 | */ |
9244b2c3 JB |
821 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
822 | active_list) { | |
fe1b26c9 TI |
823 | if (ti->flags & SNDRV_TIMER_IFLG_DEAD) |
824 | continue; | |
1da177e4 LT |
825 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
826 | continue; | |
827 | ti->pticks += ticks_left; | |
828 | ti->resolution = resolution; | |
829 | if (ti->cticks < ticks_left) | |
830 | ti->cticks = 0; | |
831 | else | |
832 | ti->cticks -= ticks_left; | |
833 | if (ti->cticks) /* not expired */ | |
834 | continue; | |
835 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { | |
836 | ti->cticks = ti->ticks; | |
837 | } else { | |
838 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; | |
094fd3be TI |
839 | --timer->running; |
840 | list_del_init(&ti->active_list); | |
1da177e4 | 841 | } |
6b172a85 CL |
842 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
843 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) | |
844 | ack_list_head = &timer->ack_list_head; | |
845 | else | |
846 | ack_list_head = &timer->sack_list_head; | |
847 | if (list_empty(&ti->ack_list)) | |
848 | list_add_tail(&ti->ack_list, ack_list_head); | |
9244b2c3 | 849 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
1da177e4 LT |
850 | ts->pticks = ti->pticks; |
851 | ts->resolution = resolution; | |
6b172a85 CL |
852 | if (list_empty(&ts->ack_list)) |
853 | list_add_tail(&ts->ack_list, ack_list_head); | |
1da177e4 LT |
854 | } |
855 | } | |
856 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) | |
cd93fe47 | 857 | snd_timer_reschedule(timer, timer->sticks); |
1da177e4 LT |
858 | if (timer->running) { |
859 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { | |
860 | timer->hw.stop(timer); | |
861 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; | |
862 | } | |
863 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || | |
864 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { | |
865 | /* restart timer */ | |
866 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; | |
867 | timer->hw.start(timer); | |
868 | } | |
869 | } else { | |
870 | timer->hw.stop(timer); | |
871 | } | |
872 | ||
873 | /* now process all fast callbacks */ | |
8748b850 | 874 | snd_timer_process_callbacks(timer, &timer->ack_list_head); |
1da177e4 LT |
875 | |
876 | /* do we have any slow callbacks? */ | |
877 | use_tasklet = !list_empty(&timer->sack_list_head); | |
b32425ac | 878 | spin_unlock_irqrestore(&timer->lock, flags); |
1da177e4 LT |
879 | |
880 | if (use_tasklet) | |
1f04128a | 881 | tasklet_schedule(&timer->task_queue); |
1da177e4 | 882 | } |
98856392 | 883 | EXPORT_SYMBOL(snd_timer_interrupt); |
1da177e4 LT |
884 | |
885 | /* | |
886 | ||
887 | */ | |
888 | ||
53d2f744 TI |
889 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
890 | struct snd_timer **rtimer) | |
1da177e4 | 891 | { |
53d2f744 | 892 | struct snd_timer *timer; |
1da177e4 | 893 | int err; |
53d2f744 | 894 | static struct snd_device_ops ops = { |
1da177e4 LT |
895 | .dev_free = snd_timer_dev_free, |
896 | .dev_register = snd_timer_dev_register, | |
c461482c | 897 | .dev_disconnect = snd_timer_dev_disconnect, |
1da177e4 LT |
898 | }; |
899 | ||
7eaa943c TI |
900 | if (snd_BUG_ON(!tid)) |
901 | return -EINVAL; | |
d10ee9c5 S |
902 | if (tid->dev_class == SNDRV_TIMER_CLASS_CARD || |
903 | tid->dev_class == SNDRV_TIMER_CLASS_PCM) { | |
904 | if (WARN_ON(!card)) | |
905 | return -EINVAL; | |
906 | } | |
7eaa943c TI |
907 | if (rtimer) |
908 | *rtimer = NULL; | |
ca2c0966 | 909 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
ec0e9937 | 910 | if (!timer) |
1da177e4 LT |
911 | return -ENOMEM; |
912 | timer->tmr_class = tid->dev_class; | |
913 | timer->card = card; | |
914 | timer->tmr_device = tid->device; | |
915 | timer->tmr_subdevice = tid->subdevice; | |
916 | if (id) | |
917 | strlcpy(timer->id, id, sizeof(timer->id)); | |
6b760bb2 | 918 | timer->sticks = 1; |
1da177e4 LT |
919 | INIT_LIST_HEAD(&timer->device_list); |
920 | INIT_LIST_HEAD(&timer->open_list_head); | |
921 | INIT_LIST_HEAD(&timer->active_list_head); | |
922 | INIT_LIST_HEAD(&timer->ack_list_head); | |
923 | INIT_LIST_HEAD(&timer->sack_list_head); | |
924 | spin_lock_init(&timer->lock); | |
6b172a85 CL |
925 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
926 | (unsigned long)timer); | |
9b7d869e | 927 | timer->max_instances = 1000; /* default limit per timer */ |
1da177e4 | 928 | if (card != NULL) { |
de24214d | 929 | timer->module = card->module; |
6b172a85 CL |
930 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
931 | if (err < 0) { | |
1da177e4 LT |
932 | snd_timer_free(timer); |
933 | return err; | |
934 | } | |
935 | } | |
7eaa943c TI |
936 | if (rtimer) |
937 | *rtimer = timer; | |
1da177e4 LT |
938 | return 0; |
939 | } | |
98856392 | 940 | EXPORT_SYMBOL(snd_timer_new); |
1da177e4 | 941 | |
53d2f744 | 942 | static int snd_timer_free(struct snd_timer *timer) |
1da177e4 | 943 | { |
7eaa943c TI |
944 | if (!timer) |
945 | return 0; | |
c461482c TI |
946 | |
947 | mutex_lock(®ister_mutex); | |
948 | if (! list_empty(&timer->open_list_head)) { | |
949 | struct list_head *p, *n; | |
950 | struct snd_timer_instance *ti; | |
cf74dcf3 | 951 | pr_warn("ALSA: timer %p is busy?\n", timer); |
c461482c TI |
952 | list_for_each_safe(p, n, &timer->open_list_head) { |
953 | list_del_init(p); | |
954 | ti = list_entry(p, struct snd_timer_instance, open_list); | |
955 | ti->timer = NULL; | |
956 | } | |
957 | } | |
958 | list_del(&timer->device_list); | |
959 | mutex_unlock(®ister_mutex); | |
960 | ||
1da177e4 LT |
961 | if (timer->private_free) |
962 | timer->private_free(timer); | |
963 | kfree(timer); | |
964 | return 0; | |
965 | } | |
966 | ||
53d2f744 | 967 | static int snd_timer_dev_free(struct snd_device *device) |
1da177e4 | 968 | { |
53d2f744 | 969 | struct snd_timer *timer = device->device_data; |
1da177e4 LT |
970 | return snd_timer_free(timer); |
971 | } | |
972 | ||
53d2f744 | 973 | static int snd_timer_dev_register(struct snd_device *dev) |
1da177e4 | 974 | { |
53d2f744 TI |
975 | struct snd_timer *timer = dev->device_data; |
976 | struct snd_timer *timer1; | |
1da177e4 | 977 | |
7eaa943c TI |
978 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
979 | return -ENXIO; | |
1da177e4 LT |
980 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
981 | !timer->hw.resolution && timer->hw.c_resolution == NULL) | |
982 | return -EINVAL; | |
983 | ||
1a60d4c5 | 984 | mutex_lock(®ister_mutex); |
9244b2c3 | 985 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
1da177e4 LT |
986 | if (timer1->tmr_class > timer->tmr_class) |
987 | break; | |
988 | if (timer1->tmr_class < timer->tmr_class) | |
989 | continue; | |
990 | if (timer1->card && timer->card) { | |
991 | if (timer1->card->number > timer->card->number) | |
992 | break; | |
993 | if (timer1->card->number < timer->card->number) | |
994 | continue; | |
995 | } | |
996 | if (timer1->tmr_device > timer->tmr_device) | |
997 | break; | |
998 | if (timer1->tmr_device < timer->tmr_device) | |
999 | continue; | |
1000 | if (timer1->tmr_subdevice > timer->tmr_subdevice) | |
1001 | break; | |
1002 | if (timer1->tmr_subdevice < timer->tmr_subdevice) | |
1003 | continue; | |
1004 | /* conflicts.. */ | |
1a60d4c5 | 1005 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1006 | return -EBUSY; |
1007 | } | |
9244b2c3 | 1008 | list_add_tail(&timer->device_list, &timer1->device_list); |
1a60d4c5 | 1009 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1010 | return 0; |
1011 | } | |
1012 | ||
c461482c | 1013 | static int snd_timer_dev_disconnect(struct snd_device *device) |
1da177e4 | 1014 | { |
c461482c | 1015 | struct snd_timer *timer = device->device_data; |
230323da TI |
1016 | struct snd_timer_instance *ti; |
1017 | ||
1a60d4c5 | 1018 | mutex_lock(®ister_mutex); |
c461482c | 1019 | list_del_init(&timer->device_list); |
230323da TI |
1020 | /* wake up pending sleepers */ |
1021 | list_for_each_entry(ti, &timer->open_list_head, open_list) { | |
40ed9444 TI |
1022 | if (ti->disconnect) |
1023 | ti->disconnect(ti); | |
230323da | 1024 | } |
1a60d4c5 | 1025 | mutex_unlock(®ister_mutex); |
c461482c | 1026 | return 0; |
1da177e4 LT |
1027 | } |
1028 | ||
53d2f744 | 1029 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
1da177e4 LT |
1030 | { |
1031 | unsigned long flags; | |
1032 | unsigned long resolution = 0; | |
53d2f744 | 1033 | struct snd_timer_instance *ti, *ts; |
1da177e4 | 1034 | |
230323da TI |
1035 | if (timer->card && timer->card->shutdown) |
1036 | return; | |
7c22f1aa TI |
1037 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
1038 | return; | |
7eaa943c TI |
1039 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
1040 | event > SNDRV_TIMER_EVENT_MRESUME)) | |
1041 | return; | |
1da177e4 | 1042 | spin_lock_irqsave(&timer->lock, flags); |
a501dfa3 JK |
1043 | if (event == SNDRV_TIMER_EVENT_MSTART || |
1044 | event == SNDRV_TIMER_EVENT_MCONTINUE || | |
fdcb5761 TI |
1045 | event == SNDRV_TIMER_EVENT_MRESUME) |
1046 | resolution = snd_timer_hw_resolution(timer); | |
9244b2c3 | 1047 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
1da177e4 LT |
1048 | if (ti->ccallback) |
1049 | ti->ccallback(ti, event, tstamp, resolution); | |
9244b2c3 | 1050 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
1da177e4 LT |
1051 | if (ts->ccallback) |
1052 | ts->ccallback(ts, event, tstamp, resolution); | |
1da177e4 LT |
1053 | } |
1054 | spin_unlock_irqrestore(&timer->lock, flags); | |
1055 | } | |
98856392 | 1056 | EXPORT_SYMBOL(snd_timer_notify); |
1da177e4 LT |
1057 | |
1058 | /* | |
1059 | * exported functions for global timers | |
1060 | */ | |
53d2f744 | 1061 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
1da177e4 | 1062 | { |
53d2f744 | 1063 | struct snd_timer_id tid; |
6b172a85 | 1064 | |
1da177e4 LT |
1065 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
1066 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1067 | tid.card = -1; | |
1068 | tid.device = device; | |
1069 | tid.subdevice = 0; | |
1070 | return snd_timer_new(NULL, id, &tid, rtimer); | |
1071 | } | |
98856392 | 1072 | EXPORT_SYMBOL(snd_timer_global_new); |
1da177e4 | 1073 | |
53d2f744 | 1074 | int snd_timer_global_free(struct snd_timer *timer) |
1da177e4 LT |
1075 | { |
1076 | return snd_timer_free(timer); | |
1077 | } | |
98856392 | 1078 | EXPORT_SYMBOL(snd_timer_global_free); |
1da177e4 | 1079 | |
53d2f744 | 1080 | int snd_timer_global_register(struct snd_timer *timer) |
1da177e4 | 1081 | { |
53d2f744 | 1082 | struct snd_device dev; |
1da177e4 LT |
1083 | |
1084 | memset(&dev, 0, sizeof(dev)); | |
1085 | dev.device_data = timer; | |
1086 | return snd_timer_dev_register(&dev); | |
1087 | } | |
98856392 | 1088 | EXPORT_SYMBOL(snd_timer_global_register); |
1da177e4 | 1089 | |
6b172a85 | 1090 | /* |
1da177e4 LT |
1091 | * System timer |
1092 | */ | |
1093 | ||
1094 | struct snd_timer_system_private { | |
1095 | struct timer_list tlist; | |
38e9a80f | 1096 | struct snd_timer *snd_timer; |
1da177e4 LT |
1097 | unsigned long last_expires; |
1098 | unsigned long last_jiffies; | |
1099 | unsigned long correction; | |
1100 | }; | |
1101 | ||
38e9a80f | 1102 | static void snd_timer_s_function(struct timer_list *t) |
1da177e4 | 1103 | { |
38e9a80f KC |
1104 | struct snd_timer_system_private *priv = from_timer(priv, t, |
1105 | tlist); | |
1106 | struct snd_timer *timer = priv->snd_timer; | |
1da177e4 LT |
1107 | unsigned long jiff = jiffies; |
1108 | if (time_after(jiff, priv->last_expires)) | |
6ed5eff0 | 1109 | priv->correction += (long)jiff - (long)priv->last_expires; |
1da177e4 LT |
1110 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
1111 | } | |
1112 | ||
53d2f744 | 1113 | static int snd_timer_s_start(struct snd_timer * timer) |
1da177e4 LT |
1114 | { |
1115 | struct snd_timer_system_private *priv; | |
1116 | unsigned long njiff; | |
1117 | ||
1118 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1119 | njiff = (priv->last_jiffies = jiffies); | |
1120 | if (priv->correction > timer->sticks - 1) { | |
1121 | priv->correction -= timer->sticks - 1; | |
1122 | njiff++; | |
1123 | } else { | |
1124 | njiff += timer->sticks - priv->correction; | |
17f48ec3 | 1125 | priv->correction = 0; |
1da177e4 | 1126 | } |
4a07083e TI |
1127 | priv->last_expires = njiff; |
1128 | mod_timer(&priv->tlist, njiff); | |
1da177e4 LT |
1129 | return 0; |
1130 | } | |
1131 | ||
53d2f744 | 1132 | static int snd_timer_s_stop(struct snd_timer * timer) |
1da177e4 LT |
1133 | { |
1134 | struct snd_timer_system_private *priv; | |
1135 | unsigned long jiff; | |
1136 | ||
1137 | priv = (struct snd_timer_system_private *) timer->private_data; | |
1138 | del_timer(&priv->tlist); | |
1139 | jiff = jiffies; | |
1140 | if (time_before(jiff, priv->last_expires)) | |
1141 | timer->sticks = priv->last_expires - jiff; | |
1142 | else | |
1143 | timer->sticks = 1; | |
de2696d8 | 1144 | priv->correction = 0; |
1da177e4 LT |
1145 | return 0; |
1146 | } | |
1147 | ||
f146357f TI |
1148 | static int snd_timer_s_close(struct snd_timer *timer) |
1149 | { | |
1150 | struct snd_timer_system_private *priv; | |
1151 | ||
1152 | priv = (struct snd_timer_system_private *)timer->private_data; | |
1153 | del_timer_sync(&priv->tlist); | |
1154 | return 0; | |
1155 | } | |
1156 | ||
53d2f744 | 1157 | static struct snd_timer_hardware snd_timer_system = |
1da177e4 LT |
1158 | { |
1159 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, | |
1160 | .resolution = 1000000000L / HZ, | |
1161 | .ticks = 10000000L, | |
f146357f | 1162 | .close = snd_timer_s_close, |
1da177e4 LT |
1163 | .start = snd_timer_s_start, |
1164 | .stop = snd_timer_s_stop | |
1165 | }; | |
1166 | ||
53d2f744 | 1167 | static void snd_timer_free_system(struct snd_timer *timer) |
1da177e4 LT |
1168 | { |
1169 | kfree(timer->private_data); | |
1170 | } | |
1171 | ||
1172 | static int snd_timer_register_system(void) | |
1173 | { | |
53d2f744 | 1174 | struct snd_timer *timer; |
1da177e4 LT |
1175 | struct snd_timer_system_private *priv; |
1176 | int err; | |
1177 | ||
6b172a85 CL |
1178 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
1179 | if (err < 0) | |
1da177e4 LT |
1180 | return err; |
1181 | strcpy(timer->name, "system timer"); | |
1182 | timer->hw = snd_timer_system; | |
ca2c0966 | 1183 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1da177e4 LT |
1184 | if (priv == NULL) { |
1185 | snd_timer_free(timer); | |
1186 | return -ENOMEM; | |
1187 | } | |
38e9a80f KC |
1188 | priv->snd_timer = timer; |
1189 | timer_setup(&priv->tlist, snd_timer_s_function, 0); | |
1da177e4 LT |
1190 | timer->private_data = priv; |
1191 | timer->private_free = snd_timer_free_system; | |
1192 | return snd_timer_global_register(timer); | |
1193 | } | |
1194 | ||
cd6a6503 | 1195 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1196 | /* |
1197 | * Info interface | |
1198 | */ | |
1199 | ||
53d2f744 TI |
1200 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
1201 | struct snd_info_buffer *buffer) | |
1da177e4 | 1202 | { |
53d2f744 TI |
1203 | struct snd_timer *timer; |
1204 | struct snd_timer_instance *ti; | |
1da177e4 | 1205 | |
1a60d4c5 | 1206 | mutex_lock(®ister_mutex); |
9244b2c3 | 1207 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
230323da TI |
1208 | if (timer->card && timer->card->shutdown) |
1209 | continue; | |
1da177e4 LT |
1210 | switch (timer->tmr_class) { |
1211 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1212 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); | |
1213 | break; | |
1214 | case SNDRV_TIMER_CLASS_CARD: | |
6b172a85 CL |
1215 | snd_iprintf(buffer, "C%i-%i: ", |
1216 | timer->card->number, timer->tmr_device); | |
1da177e4 LT |
1217 | break; |
1218 | case SNDRV_TIMER_CLASS_PCM: | |
6b172a85 CL |
1219 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
1220 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1221 | break; |
1222 | default: | |
6b172a85 CL |
1223 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
1224 | timer->card ? timer->card->number : -1, | |
1225 | timer->tmr_device, timer->tmr_subdevice); | |
1da177e4 LT |
1226 | } |
1227 | snd_iprintf(buffer, "%s :", timer->name); | |
1228 | if (timer->hw.resolution) | |
6b172a85 CL |
1229 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
1230 | timer->hw.resolution / 1000, | |
1231 | timer->hw.resolution % 1000, | |
1232 | timer->hw.ticks); | |
1da177e4 LT |
1233 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
1234 | snd_iprintf(buffer, " SLAVE"); | |
1235 | snd_iprintf(buffer, "\n"); | |
9244b2c3 | 1236 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
6b172a85 CL |
1237 | snd_iprintf(buffer, " Client %s : %s\n", |
1238 | ti->owner ? ti->owner : "unknown", | |
1239 | ti->flags & (SNDRV_TIMER_IFLG_START | | |
1240 | SNDRV_TIMER_IFLG_RUNNING) | |
1241 | ? "running" : "stopped"); | |
1da177e4 | 1242 | } |
1a60d4c5 | 1243 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1244 | } |
1245 | ||
6581f4e7 | 1246 | static struct snd_info_entry *snd_timer_proc_entry; |
e28563cc TI |
1247 | |
1248 | static void __init snd_timer_proc_init(void) | |
1249 | { | |
1250 | struct snd_info_entry *entry; | |
1251 | ||
1252 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); | |
1253 | if (entry != NULL) { | |
e28563cc TI |
1254 | entry->c.text.read = snd_timer_proc_read; |
1255 | if (snd_info_register(entry) < 0) { | |
1256 | snd_info_free_entry(entry); | |
1257 | entry = NULL; | |
1258 | } | |
1259 | } | |
1260 | snd_timer_proc_entry = entry; | |
1261 | } | |
1262 | ||
1263 | static void __exit snd_timer_proc_done(void) | |
1264 | { | |
746d4a02 | 1265 | snd_info_free_entry(snd_timer_proc_entry); |
e28563cc | 1266 | } |
cd6a6503 | 1267 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1268 | #define snd_timer_proc_init() |
1269 | #define snd_timer_proc_done() | |
1270 | #endif | |
1271 | ||
1da177e4 LT |
1272 | /* |
1273 | * USER SPACE interface | |
1274 | */ | |
1275 | ||
53d2f744 | 1276 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1277 | unsigned long resolution, |
1278 | unsigned long ticks) | |
1279 | { | |
53d2f744 TI |
1280 | struct snd_timer_user *tu = timeri->callback_data; |
1281 | struct snd_timer_read *r; | |
1da177e4 | 1282 | int prev; |
6b172a85 | 1283 | |
1da177e4 LT |
1284 | spin_lock(&tu->qlock); |
1285 | if (tu->qused > 0) { | |
1286 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1287 | r = &tu->queue[prev]; | |
1288 | if (r->resolution == resolution) { | |
1289 | r->ticks += ticks; | |
1290 | goto __wake; | |
1291 | } | |
1292 | } | |
1293 | if (tu->qused >= tu->queue_size) { | |
1294 | tu->overrun++; | |
1295 | } else { | |
1296 | r = &tu->queue[tu->qtail++]; | |
1297 | tu->qtail %= tu->queue_size; | |
1298 | r->resolution = resolution; | |
1299 | r->ticks = ticks; | |
1300 | tu->qused++; | |
1301 | } | |
1302 | __wake: | |
1303 | spin_unlock(&tu->qlock); | |
1304 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1305 | wake_up(&tu->qchange_sleep); | |
1306 | } | |
1307 | ||
53d2f744 TI |
1308 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
1309 | struct snd_timer_tread *tread) | |
1da177e4 LT |
1310 | { |
1311 | if (tu->qused >= tu->queue_size) { | |
1312 | tu->overrun++; | |
1313 | } else { | |
1314 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); | |
1315 | tu->qtail %= tu->queue_size; | |
1316 | tu->qused++; | |
1317 | } | |
1318 | } | |
1319 | ||
53d2f744 TI |
1320 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
1321 | int event, | |
1da177e4 LT |
1322 | struct timespec *tstamp, |
1323 | unsigned long resolution) | |
1324 | { | |
53d2f744 TI |
1325 | struct snd_timer_user *tu = timeri->callback_data; |
1326 | struct snd_timer_tread r1; | |
bfe70783 | 1327 | unsigned long flags; |
1da177e4 | 1328 | |
6b172a85 CL |
1329 | if (event >= SNDRV_TIMER_EVENT_START && |
1330 | event <= SNDRV_TIMER_EVENT_PAUSE) | |
1da177e4 LT |
1331 | tu->tstamp = *tstamp; |
1332 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) | |
1333 | return; | |
9a47e9cf | 1334 | memset(&r1, 0, sizeof(r1)); |
1da177e4 LT |
1335 | r1.event = event; |
1336 | r1.tstamp = *tstamp; | |
1337 | r1.val = resolution; | |
bfe70783 | 1338 | spin_lock_irqsave(&tu->qlock, flags); |
1da177e4 | 1339 | snd_timer_user_append_to_tqueue(tu, &r1); |
bfe70783 | 1340 | spin_unlock_irqrestore(&tu->qlock, flags); |
1da177e4 LT |
1341 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
1342 | wake_up(&tu->qchange_sleep); | |
1343 | } | |
1344 | ||
40ed9444 TI |
1345 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
1346 | { | |
1347 | struct snd_timer_user *tu = timeri->callback_data; | |
1348 | ||
1349 | tu->disconnected = true; | |
1350 | wake_up(&tu->qchange_sleep); | |
1351 | } | |
1352 | ||
53d2f744 | 1353 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
1da177e4 LT |
1354 | unsigned long resolution, |
1355 | unsigned long ticks) | |
1356 | { | |
53d2f744 TI |
1357 | struct snd_timer_user *tu = timeri->callback_data; |
1358 | struct snd_timer_tread *r, r1; | |
1da177e4 LT |
1359 | struct timespec tstamp; |
1360 | int prev, append = 0; | |
1361 | ||
a8c006aa | 1362 | memset(&r1, 0, sizeof(r1)); |
07799e75 | 1363 | memset(&tstamp, 0, sizeof(tstamp)); |
1da177e4 | 1364 | spin_lock(&tu->qlock); |
6b172a85 CL |
1365 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
1366 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { | |
1da177e4 LT |
1367 | spin_unlock(&tu->qlock); |
1368 | return; | |
1369 | } | |
b751eef1 JK |
1370 | if (tu->last_resolution != resolution || ticks > 0) { |
1371 | if (timer_tstamp_monotonic) | |
26204e04 | 1372 | ktime_get_ts(&tstamp); |
b751eef1 JK |
1373 | else |
1374 | getnstimeofday(&tstamp); | |
1375 | } | |
6b172a85 CL |
1376 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
1377 | tu->last_resolution != resolution) { | |
1da177e4 LT |
1378 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
1379 | r1.tstamp = tstamp; | |
1380 | r1.val = resolution; | |
1381 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1382 | tu->last_resolution = resolution; | |
1383 | append++; | |
1384 | } | |
1385 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) | |
1386 | goto __wake; | |
1387 | if (ticks == 0) | |
1388 | goto __wake; | |
1389 | if (tu->qused > 0) { | |
1390 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; | |
1391 | r = &tu->tqueue[prev]; | |
1392 | if (r->event == SNDRV_TIMER_EVENT_TICK) { | |
1393 | r->tstamp = tstamp; | |
1394 | r->val += ticks; | |
1395 | append++; | |
1396 | goto __wake; | |
1397 | } | |
1398 | } | |
1399 | r1.event = SNDRV_TIMER_EVENT_TICK; | |
1400 | r1.tstamp = tstamp; | |
1401 | r1.val = ticks; | |
1402 | snd_timer_user_append_to_tqueue(tu, &r1); | |
1403 | append++; | |
1404 | __wake: | |
1405 | spin_unlock(&tu->qlock); | |
1406 | if (append == 0) | |
1407 | return; | |
1408 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); | |
1409 | wake_up(&tu->qchange_sleep); | |
1410 | } | |
1411 | ||
890e2cb5 TI |
1412 | static int realloc_user_queue(struct snd_timer_user *tu, int size) |
1413 | { | |
1414 | struct snd_timer_read *queue = NULL; | |
1415 | struct snd_timer_tread *tqueue = NULL; | |
1416 | ||
1417 | if (tu->tread) { | |
1418 | tqueue = kcalloc(size, sizeof(*tqueue), GFP_KERNEL); | |
1419 | if (!tqueue) | |
1420 | return -ENOMEM; | |
1421 | } else { | |
1422 | queue = kcalloc(size, sizeof(*queue), GFP_KERNEL); | |
1423 | if (!queue) | |
1424 | return -ENOMEM; | |
1425 | } | |
1426 | ||
1427 | spin_lock_irq(&tu->qlock); | |
1428 | kfree(tu->queue); | |
1429 | kfree(tu->tqueue); | |
1430 | tu->queue_size = size; | |
1431 | tu->queue = queue; | |
1432 | tu->tqueue = tqueue; | |
1433 | tu->qhead = tu->qtail = tu->qused = 0; | |
1434 | spin_unlock_irq(&tu->qlock); | |
1435 | ||
1436 | return 0; | |
1437 | } | |
1438 | ||
1da177e4 LT |
1439 | static int snd_timer_user_open(struct inode *inode, struct file *file) |
1440 | { | |
53d2f744 | 1441 | struct snd_timer_user *tu; |
02f4865f TI |
1442 | int err; |
1443 | ||
c5bf68fe | 1444 | err = stream_open(inode, file); |
02f4865f TI |
1445 | if (err < 0) |
1446 | return err; | |
6b172a85 | 1447 | |
ca2c0966 | 1448 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
1da177e4 LT |
1449 | if (tu == NULL) |
1450 | return -ENOMEM; | |
1451 | spin_lock_init(&tu->qlock); | |
1452 | init_waitqueue_head(&tu->qchange_sleep); | |
af368027 | 1453 | mutex_init(&tu->ioctl_lock); |
1da177e4 | 1454 | tu->ticks = 1; |
890e2cb5 | 1455 | if (realloc_user_queue(tu, 128) < 0) { |
1da177e4 LT |
1456 | kfree(tu); |
1457 | return -ENOMEM; | |
1458 | } | |
1459 | file->private_data = tu; | |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | static int snd_timer_user_release(struct inode *inode, struct file *file) | |
1464 | { | |
53d2f744 | 1465 | struct snd_timer_user *tu; |
1da177e4 LT |
1466 | |
1467 | if (file->private_data) { | |
1468 | tu = file->private_data; | |
1469 | file->private_data = NULL; | |
af368027 | 1470 | mutex_lock(&tu->ioctl_lock); |
6a34367e | 1471 | if (tu->timeri) { |
1da177e4 | 1472 | snd_timer_close(tu->timeri); |
6a34367e TI |
1473 | snd_timer_instance_free(tu->timeri); |
1474 | } | |
af368027 | 1475 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
1476 | kfree(tu->queue); |
1477 | kfree(tu->tqueue); | |
1478 | kfree(tu); | |
1479 | } | |
1480 | return 0; | |
1481 | } | |
1482 | ||
53d2f744 | 1483 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
1da177e4 LT |
1484 | { |
1485 | id->dev_class = SNDRV_TIMER_CLASS_NONE; | |
1486 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1487 | id->card = -1; | |
1488 | id->device = -1; | |
1489 | id->subdevice = -1; | |
1490 | } | |
1491 | ||
53d2f744 | 1492 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
1da177e4 LT |
1493 | { |
1494 | id->dev_class = timer->tmr_class; | |
1495 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
1496 | id->card = timer->card ? timer->card->number : -1; | |
1497 | id->device = timer->tmr_device; | |
1498 | id->subdevice = timer->tmr_subdevice; | |
1499 | } | |
1500 | ||
53d2f744 | 1501 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
1da177e4 | 1502 | { |
53d2f744 TI |
1503 | struct snd_timer_id id; |
1504 | struct snd_timer *timer; | |
1da177e4 | 1505 | struct list_head *p; |
6b172a85 | 1506 | |
1da177e4 LT |
1507 | if (copy_from_user(&id, _tid, sizeof(id))) |
1508 | return -EFAULT; | |
1a60d4c5 | 1509 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1510 | if (id.dev_class < 0) { /* first item */ |
1511 | if (list_empty(&snd_timer_list)) | |
1512 | snd_timer_user_zero_id(&id); | |
1513 | else { | |
9dfba380 | 1514 | timer = list_entry(snd_timer_list.next, |
53d2f744 | 1515 | struct snd_timer, device_list); |
1da177e4 LT |
1516 | snd_timer_user_copy_id(&id, timer); |
1517 | } | |
1518 | } else { | |
1519 | switch (id.dev_class) { | |
1520 | case SNDRV_TIMER_CLASS_GLOBAL: | |
1521 | id.device = id.device < 0 ? 0 : id.device + 1; | |
1522 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1523 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1524 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
1525 | snd_timer_user_copy_id(&id, timer); | |
1526 | break; | |
1527 | } | |
1528 | if (timer->tmr_device >= id.device) { | |
1529 | snd_timer_user_copy_id(&id, timer); | |
1530 | break; | |
1531 | } | |
1532 | } | |
1533 | if (p == &snd_timer_list) | |
1534 | snd_timer_user_zero_id(&id); | |
1535 | break; | |
1536 | case SNDRV_TIMER_CLASS_CARD: | |
1537 | case SNDRV_TIMER_CLASS_PCM: | |
1538 | if (id.card < 0) { | |
1539 | id.card = 0; | |
1540 | } else { | |
e8ed6820 DC |
1541 | if (id.device < 0) { |
1542 | id.device = 0; | |
1da177e4 | 1543 | } else { |
e8ed6820 DC |
1544 | if (id.subdevice < 0) |
1545 | id.subdevice = 0; | |
b41f794f | 1546 | else if (id.subdevice < INT_MAX) |
e8ed6820 | 1547 | id.subdevice++; |
1da177e4 LT |
1548 | } |
1549 | } | |
1550 | list_for_each(p, &snd_timer_list) { | |
53d2f744 | 1551 | timer = list_entry(p, struct snd_timer, device_list); |
1da177e4 LT |
1552 | if (timer->tmr_class > id.dev_class) { |
1553 | snd_timer_user_copy_id(&id, timer); | |
1554 | break; | |
1555 | } | |
1556 | if (timer->tmr_class < id.dev_class) | |
1557 | continue; | |
1558 | if (timer->card->number > id.card) { | |
1559 | snd_timer_user_copy_id(&id, timer); | |
1560 | break; | |
1561 | } | |
1562 | if (timer->card->number < id.card) | |
1563 | continue; | |
1564 | if (timer->tmr_device > id.device) { | |
1565 | snd_timer_user_copy_id(&id, timer); | |
1566 | break; | |
1567 | } | |
1568 | if (timer->tmr_device < id.device) | |
1569 | continue; | |
1570 | if (timer->tmr_subdevice > id.subdevice) { | |
1571 | snd_timer_user_copy_id(&id, timer); | |
1572 | break; | |
1573 | } | |
1574 | if (timer->tmr_subdevice < id.subdevice) | |
1575 | continue; | |
1576 | snd_timer_user_copy_id(&id, timer); | |
1577 | break; | |
1578 | } | |
1579 | if (p == &snd_timer_list) | |
1580 | snd_timer_user_zero_id(&id); | |
1581 | break; | |
1582 | default: | |
1583 | snd_timer_user_zero_id(&id); | |
1584 | } | |
1585 | } | |
1a60d4c5 | 1586 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1587 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
1588 | return -EFAULT; | |
1589 | return 0; | |
6b172a85 | 1590 | } |
1da177e4 | 1591 | |
6b172a85 | 1592 | static int snd_timer_user_ginfo(struct file *file, |
53d2f744 | 1593 | struct snd_timer_ginfo __user *_ginfo) |
1da177e4 | 1594 | { |
53d2f744 TI |
1595 | struct snd_timer_ginfo *ginfo; |
1596 | struct snd_timer_id tid; | |
1597 | struct snd_timer *t; | |
1da177e4 LT |
1598 | struct list_head *p; |
1599 | int err = 0; | |
1600 | ||
ef44a1ec LZ |
1601 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
1602 | if (IS_ERR(ginfo)) | |
1603 | return PTR_ERR(ginfo); | |
1604 | ||
1da177e4 LT |
1605 | tid = ginfo->tid; |
1606 | memset(ginfo, 0, sizeof(*ginfo)); | |
1607 | ginfo->tid = tid; | |
1a60d4c5 | 1608 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1609 | t = snd_timer_find(&tid); |
1610 | if (t != NULL) { | |
1611 | ginfo->card = t->card ? t->card->number : -1; | |
1612 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1613 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1614 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); | |
1615 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); | |
1616 | ginfo->resolution = t->hw.resolution; | |
1617 | if (t->hw.resolution_min > 0) { | |
1618 | ginfo->resolution_min = t->hw.resolution_min; | |
1619 | ginfo->resolution_max = t->hw.resolution_max; | |
1620 | } | |
1621 | list_for_each(p, &t->open_list_head) { | |
1622 | ginfo->clients++; | |
1623 | } | |
1624 | } else { | |
1625 | err = -ENODEV; | |
1626 | } | |
1a60d4c5 | 1627 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1628 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
1629 | err = -EFAULT; | |
1630 | kfree(ginfo); | |
1631 | return err; | |
1632 | } | |
1633 | ||
91d2178e | 1634 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
1da177e4 | 1635 | { |
53d2f744 | 1636 | struct snd_timer *t; |
1da177e4 LT |
1637 | int err; |
1638 | ||
1a60d4c5 | 1639 | mutex_lock(®ister_mutex); |
91d2178e | 1640 | t = snd_timer_find(&gparams->tid); |
6b172a85 | 1641 | if (!t) { |
1da177e4 | 1642 | err = -ENODEV; |
6b172a85 CL |
1643 | goto _error; |
1644 | } | |
1645 | if (!list_empty(&t->open_list_head)) { | |
1646 | err = -EBUSY; | |
1647 | goto _error; | |
1648 | } | |
1649 | if (!t->hw.set_period) { | |
1650 | err = -ENOSYS; | |
1651 | goto _error; | |
1da177e4 | 1652 | } |
91d2178e | 1653 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
6b172a85 | 1654 | _error: |
1a60d4c5 | 1655 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1656 | return err; |
1657 | } | |
1658 | ||
91d2178e TS |
1659 | static int snd_timer_user_gparams(struct file *file, |
1660 | struct snd_timer_gparams __user *_gparams) | |
1661 | { | |
1662 | struct snd_timer_gparams gparams; | |
1663 | ||
1664 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) | |
1665 | return -EFAULT; | |
1666 | return timer_set_gparams(&gparams); | |
1667 | } | |
1668 | ||
6b172a85 | 1669 | static int snd_timer_user_gstatus(struct file *file, |
53d2f744 | 1670 | struct snd_timer_gstatus __user *_gstatus) |
1da177e4 | 1671 | { |
53d2f744 TI |
1672 | struct snd_timer_gstatus gstatus; |
1673 | struct snd_timer_id tid; | |
1674 | struct snd_timer *t; | |
1da177e4 LT |
1675 | int err = 0; |
1676 | ||
1677 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) | |
1678 | return -EFAULT; | |
1679 | tid = gstatus.tid; | |
1680 | memset(&gstatus, 0, sizeof(gstatus)); | |
1681 | gstatus.tid = tid; | |
1a60d4c5 | 1682 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1683 | t = snd_timer_find(&tid); |
1684 | if (t != NULL) { | |
9d4d207d | 1685 | spin_lock_irq(&t->lock); |
fdcb5761 | 1686 | gstatus.resolution = snd_timer_hw_resolution(t); |
1da177e4 | 1687 | if (t->hw.precise_resolution) { |
6b172a85 CL |
1688 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
1689 | &gstatus.resolution_den); | |
1da177e4 LT |
1690 | } else { |
1691 | gstatus.resolution_num = gstatus.resolution; | |
1692 | gstatus.resolution_den = 1000000000uL; | |
1693 | } | |
9d4d207d | 1694 | spin_unlock_irq(&t->lock); |
1da177e4 LT |
1695 | } else { |
1696 | err = -ENODEV; | |
1697 | } | |
1a60d4c5 | 1698 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1699 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
1700 | err = -EFAULT; | |
1701 | return err; | |
1702 | } | |
1703 | ||
6b172a85 | 1704 | static int snd_timer_user_tselect(struct file *file, |
53d2f744 | 1705 | struct snd_timer_select __user *_tselect) |
1da177e4 | 1706 | { |
53d2f744 TI |
1707 | struct snd_timer_user *tu; |
1708 | struct snd_timer_select tselect; | |
1da177e4 | 1709 | char str[32]; |
c1935b4d | 1710 | int err = 0; |
6b172a85 | 1711 | |
1da177e4 | 1712 | tu = file->private_data; |
c1935b4d | 1713 | if (tu->timeri) { |
1da177e4 | 1714 | snd_timer_close(tu->timeri); |
6a34367e | 1715 | snd_timer_instance_free(tu->timeri); |
c1935b4d JK |
1716 | tu->timeri = NULL; |
1717 | } | |
1718 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { | |
1719 | err = -EFAULT; | |
1720 | goto __err; | |
1721 | } | |
1da177e4 LT |
1722 | sprintf(str, "application %i", current->pid); |
1723 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) | |
1724 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; | |
6a34367e TI |
1725 | tu->timeri = snd_timer_instance_new(str); |
1726 | if (!tu->timeri) { | |
1727 | err = -ENOMEM; | |
c1935b4d | 1728 | goto __err; |
6a34367e | 1729 | } |
1da177e4 | 1730 | |
890e2cb5 TI |
1731 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; |
1732 | tu->timeri->callback = tu->tread | |
6b172a85 | 1733 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; |
890e2cb5 TI |
1734 | tu->timeri->ccallback = snd_timer_user_ccallback; |
1735 | tu->timeri->callback_data = (void *)tu; | |
1736 | tu->timeri->disconnect = snd_timer_user_disconnect; | |
c1935b4d | 1737 | |
6a34367e TI |
1738 | err = snd_timer_open(tu->timeri, &tselect.id, current->pid); |
1739 | if (err < 0) { | |
1740 | snd_timer_instance_free(tu->timeri); | |
1741 | tu->timeri = NULL; | |
1742 | } | |
1743 | ||
c1935b4d | 1744 | __err: |
c1935b4d | 1745 | return err; |
1da177e4 LT |
1746 | } |
1747 | ||
6b172a85 | 1748 | static int snd_timer_user_info(struct file *file, |
53d2f744 | 1749 | struct snd_timer_info __user *_info) |
1da177e4 | 1750 | { |
53d2f744 TI |
1751 | struct snd_timer_user *tu; |
1752 | struct snd_timer_info *info; | |
1753 | struct snd_timer *t; | |
1da177e4 LT |
1754 | int err = 0; |
1755 | ||
1756 | tu = file->private_data; | |
7c64ec34 CL |
1757 | if (!tu->timeri) |
1758 | return -EBADFD; | |
1da177e4 | 1759 | t = tu->timeri->timer; |
7c64ec34 CL |
1760 | if (!t) |
1761 | return -EBADFD; | |
1da177e4 | 1762 | |
ca2c0966 | 1763 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
1764 | if (! info) |
1765 | return -ENOMEM; | |
1766 | info->card = t->card ? t->card->number : -1; | |
1767 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) | |
1768 | info->flags |= SNDRV_TIMER_FLG_SLAVE; | |
1769 | strlcpy(info->id, t->id, sizeof(info->id)); | |
1770 | strlcpy(info->name, t->name, sizeof(info->name)); | |
1771 | info->resolution = t->hw.resolution; | |
1772 | if (copy_to_user(_info, info, sizeof(*_info))) | |
1773 | err = -EFAULT; | |
1774 | kfree(info); | |
1775 | return err; | |
1776 | } | |
1777 | ||
6b172a85 | 1778 | static int snd_timer_user_params(struct file *file, |
53d2f744 | 1779 | struct snd_timer_params __user *_params) |
1da177e4 | 1780 | { |
53d2f744 TI |
1781 | struct snd_timer_user *tu; |
1782 | struct snd_timer_params params; | |
1783 | struct snd_timer *t; | |
1da177e4 | 1784 | int err; |
6b172a85 | 1785 | |
1da177e4 | 1786 | tu = file->private_data; |
7c64ec34 CL |
1787 | if (!tu->timeri) |
1788 | return -EBADFD; | |
1da177e4 | 1789 | t = tu->timeri->timer; |
7c64ec34 CL |
1790 | if (!t) |
1791 | return -EBADFD; | |
1da177e4 LT |
1792 | if (copy_from_user(¶ms, _params, sizeof(params))) |
1793 | return -EFAULT; | |
71321eb3 TI |
1794 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { |
1795 | u64 resolution; | |
1796 | ||
1797 | if (params.ticks < 1) { | |
1798 | err = -EINVAL; | |
1799 | goto _end; | |
1800 | } | |
1801 | ||
1802 | /* Don't allow resolution less than 1ms */ | |
1803 | resolution = snd_timer_resolution(tu->timeri); | |
1804 | resolution *= params.ticks; | |
1805 | if (resolution < 1000000) { | |
1806 | err = -EINVAL; | |
1807 | goto _end; | |
1808 | } | |
1da177e4 | 1809 | } |
6b172a85 CL |
1810 | if (params.queue_size > 0 && |
1811 | (params.queue_size < 32 || params.queue_size > 1024)) { | |
1da177e4 LT |
1812 | err = -EINVAL; |
1813 | goto _end; | |
1814 | } | |
1815 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| | |
1816 | (1<<SNDRV_TIMER_EVENT_TICK)| | |
1817 | (1<<SNDRV_TIMER_EVENT_START)| | |
1818 | (1<<SNDRV_TIMER_EVENT_STOP)| | |
1819 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| | |
1820 | (1<<SNDRV_TIMER_EVENT_PAUSE)| | |
a501dfa3 JK |
1821 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
1822 | (1<<SNDRV_TIMER_EVENT_RESUME)| | |
1da177e4 LT |
1823 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
1824 | (1<<SNDRV_TIMER_EVENT_MSTOP)| | |
1825 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| | |
65d11d95 JK |
1826 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
1827 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| | |
a501dfa3 | 1828 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
1da177e4 LT |
1829 | err = -EINVAL; |
1830 | goto _end; | |
1831 | } | |
1832 | snd_timer_stop(tu->timeri); | |
1833 | spin_lock_irq(&t->lock); | |
1834 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| | |
1835 | SNDRV_TIMER_IFLG_EXCLUSIVE| | |
1836 | SNDRV_TIMER_IFLG_EARLY_EVENT); | |
1837 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) | |
1838 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; | |
1839 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) | |
1840 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; | |
1841 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) | |
1842 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; | |
1843 | spin_unlock_irq(&t->lock); | |
6b172a85 CL |
1844 | if (params.queue_size > 0 && |
1845 | (unsigned int)tu->queue_size != params.queue_size) { | |
890e2cb5 TI |
1846 | err = realloc_user_queue(tu, params.queue_size); |
1847 | if (err < 0) | |
1848 | goto _end; | |
1da177e4 | 1849 | } |
d7f910bf | 1850 | spin_lock_irq(&tu->qlock); |
1da177e4 LT |
1851 | tu->qhead = tu->qtail = tu->qused = 0; |
1852 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { | |
1853 | if (tu->tread) { | |
53d2f744 | 1854 | struct snd_timer_tread tread; |
cec8f96e | 1855 | memset(&tread, 0, sizeof(tread)); |
1da177e4 LT |
1856 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
1857 | tread.tstamp.tv_sec = 0; | |
1858 | tread.tstamp.tv_nsec = 0; | |
1859 | tread.val = 0; | |
1860 | snd_timer_user_append_to_tqueue(tu, &tread); | |
1861 | } else { | |
53d2f744 | 1862 | struct snd_timer_read *r = &tu->queue[0]; |
1da177e4 LT |
1863 | r->resolution = 0; |
1864 | r->ticks = 0; | |
1865 | tu->qused++; | |
1866 | tu->qtail++; | |
1867 | } | |
1da177e4 LT |
1868 | } |
1869 | tu->filter = params.filter; | |
1870 | tu->ticks = params.ticks; | |
d7f910bf | 1871 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
1872 | err = 0; |
1873 | _end: | |
1874 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
1875 | return -EFAULT; | |
1876 | return err; | |
1877 | } | |
1878 | ||
6b172a85 | 1879 | static int snd_timer_user_status(struct file *file, |
53d2f744 | 1880 | struct snd_timer_status __user *_status) |
1da177e4 | 1881 | { |
53d2f744 TI |
1882 | struct snd_timer_user *tu; |
1883 | struct snd_timer_status status; | |
6b172a85 | 1884 | |
1da177e4 | 1885 | tu = file->private_data; |
7c64ec34 CL |
1886 | if (!tu->timeri) |
1887 | return -EBADFD; | |
1da177e4 LT |
1888 | memset(&status, 0, sizeof(status)); |
1889 | status.tstamp = tu->tstamp; | |
1890 | status.resolution = snd_timer_resolution(tu->timeri); | |
1891 | status.lost = tu->timeri->lost; | |
1892 | status.overrun = tu->overrun; | |
1893 | spin_lock_irq(&tu->qlock); | |
1894 | status.queue = tu->qused; | |
1895 | spin_unlock_irq(&tu->qlock); | |
1896 | if (copy_to_user(_status, &status, sizeof(status))) | |
1897 | return -EFAULT; | |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | static int snd_timer_user_start(struct file *file) | |
1902 | { | |
1903 | int err; | |
53d2f744 | 1904 | struct snd_timer_user *tu; |
6b172a85 | 1905 | |
1da177e4 | 1906 | tu = file->private_data; |
7c64ec34 CL |
1907 | if (!tu->timeri) |
1908 | return -EBADFD; | |
1da177e4 LT |
1909 | snd_timer_stop(tu->timeri); |
1910 | tu->timeri->lost = 0; | |
1911 | tu->last_resolution = 0; | |
5d704b0d TI |
1912 | err = snd_timer_start(tu->timeri, tu->ticks); |
1913 | if (err < 0) | |
1914 | return err; | |
1915 | return 0; | |
1da177e4 LT |
1916 | } |
1917 | ||
1918 | static int snd_timer_user_stop(struct file *file) | |
1919 | { | |
1920 | int err; | |
53d2f744 | 1921 | struct snd_timer_user *tu; |
6b172a85 | 1922 | |
1da177e4 | 1923 | tu = file->private_data; |
7c64ec34 CL |
1924 | if (!tu->timeri) |
1925 | return -EBADFD; | |
5d704b0d TI |
1926 | err = snd_timer_stop(tu->timeri); |
1927 | if (err < 0) | |
1928 | return err; | |
1929 | return 0; | |
1da177e4 LT |
1930 | } |
1931 | ||
1932 | static int snd_timer_user_continue(struct file *file) | |
1933 | { | |
1934 | int err; | |
53d2f744 | 1935 | struct snd_timer_user *tu; |
6b172a85 | 1936 | |
1da177e4 | 1937 | tu = file->private_data; |
7c64ec34 CL |
1938 | if (!tu->timeri) |
1939 | return -EBADFD; | |
9f8a7658 TI |
1940 | /* start timer instead of continue if it's not used before */ |
1941 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) | |
1942 | return snd_timer_user_start(file); | |
1da177e4 | 1943 | tu->timeri->lost = 0; |
5d704b0d TI |
1944 | err = snd_timer_continue(tu->timeri); |
1945 | if (err < 0) | |
1946 | return err; | |
1947 | return 0; | |
1da177e4 LT |
1948 | } |
1949 | ||
15790a6b TI |
1950 | static int snd_timer_user_pause(struct file *file) |
1951 | { | |
1952 | int err; | |
53d2f744 | 1953 | struct snd_timer_user *tu; |
6b172a85 | 1954 | |
15790a6b | 1955 | tu = file->private_data; |
7c64ec34 CL |
1956 | if (!tu->timeri) |
1957 | return -EBADFD; | |
5d704b0d TI |
1958 | err = snd_timer_pause(tu->timeri); |
1959 | if (err < 0) | |
1960 | return err; | |
1961 | return 0; | |
15790a6b TI |
1962 | } |
1963 | ||
8c50b37c TI |
1964 | enum { |
1965 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), | |
1966 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), | |
1967 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), | |
1968 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), | |
1969 | }; | |
1970 | ||
af368027 | 1971 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
6b172a85 | 1972 | unsigned long arg) |
1da177e4 | 1973 | { |
53d2f744 | 1974 | struct snd_timer_user *tu; |
1da177e4 LT |
1975 | void __user *argp = (void __user *)arg; |
1976 | int __user *p = argp; | |
6b172a85 | 1977 | |
1da177e4 LT |
1978 | tu = file->private_data; |
1979 | switch (cmd) { | |
1980 | case SNDRV_TIMER_IOCTL_PVERSION: | |
1981 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; | |
1982 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: | |
1983 | return snd_timer_user_next_device(argp); | |
1984 | case SNDRV_TIMER_IOCTL_TREAD: | |
1985 | { | |
890e2cb5 | 1986 | int xarg, old_tread; |
6b172a85 | 1987 | |
af368027 | 1988 | if (tu->timeri) /* too late */ |
1da177e4 | 1989 | return -EBUSY; |
af368027 | 1990 | if (get_user(xarg, p)) |
1da177e4 | 1991 | return -EFAULT; |
890e2cb5 | 1992 | old_tread = tu->tread; |
1da177e4 | 1993 | tu->tread = xarg ? 1 : 0; |
890e2cb5 TI |
1994 | if (tu->tread != old_tread && |
1995 | realloc_user_queue(tu, tu->queue_size) < 0) { | |
1996 | tu->tread = old_tread; | |
1997 | return -ENOMEM; | |
1998 | } | |
1da177e4 LT |
1999 | return 0; |
2000 | } | |
2001 | case SNDRV_TIMER_IOCTL_GINFO: | |
2002 | return snd_timer_user_ginfo(file, argp); | |
2003 | case SNDRV_TIMER_IOCTL_GPARAMS: | |
2004 | return snd_timer_user_gparams(file, argp); | |
2005 | case SNDRV_TIMER_IOCTL_GSTATUS: | |
2006 | return snd_timer_user_gstatus(file, argp); | |
2007 | case SNDRV_TIMER_IOCTL_SELECT: | |
2008 | return snd_timer_user_tselect(file, argp); | |
2009 | case SNDRV_TIMER_IOCTL_INFO: | |
2010 | return snd_timer_user_info(file, argp); | |
2011 | case SNDRV_TIMER_IOCTL_PARAMS: | |
2012 | return snd_timer_user_params(file, argp); | |
2013 | case SNDRV_TIMER_IOCTL_STATUS: | |
2014 | return snd_timer_user_status(file, argp); | |
2015 | case SNDRV_TIMER_IOCTL_START: | |
8c50b37c | 2016 | case SNDRV_TIMER_IOCTL_START_OLD: |
1da177e4 LT |
2017 | return snd_timer_user_start(file); |
2018 | case SNDRV_TIMER_IOCTL_STOP: | |
8c50b37c | 2019 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
1da177e4 LT |
2020 | return snd_timer_user_stop(file); |
2021 | case SNDRV_TIMER_IOCTL_CONTINUE: | |
8c50b37c | 2022 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
1da177e4 | 2023 | return snd_timer_user_continue(file); |
15790a6b | 2024 | case SNDRV_TIMER_IOCTL_PAUSE: |
8c50b37c | 2025 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
15790a6b | 2026 | return snd_timer_user_pause(file); |
1da177e4 LT |
2027 | } |
2028 | return -ENOTTY; | |
2029 | } | |
2030 | ||
af368027 TI |
2031 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
2032 | unsigned long arg) | |
2033 | { | |
2034 | struct snd_timer_user *tu = file->private_data; | |
2035 | long ret; | |
2036 | ||
2037 | mutex_lock(&tu->ioctl_lock); | |
2038 | ret = __snd_timer_user_ioctl(file, cmd, arg); | |
2039 | mutex_unlock(&tu->ioctl_lock); | |
2040 | return ret; | |
2041 | } | |
2042 | ||
1da177e4 LT |
2043 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
2044 | { | |
53d2f744 | 2045 | struct snd_timer_user *tu; |
6b172a85 | 2046 | |
1da177e4 | 2047 | tu = file->private_data; |
60aa4924 | 2048 | return fasync_helper(fd, file, on, &tu->fasync); |
1da177e4 LT |
2049 | } |
2050 | ||
6b172a85 CL |
2051 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
2052 | size_t count, loff_t *offset) | |
1da177e4 | 2053 | { |
53d2f744 | 2054 | struct snd_timer_user *tu; |
1da177e4 | 2055 | long result = 0, unit; |
4dff5c7b | 2056 | int qhead; |
1da177e4 | 2057 | int err = 0; |
6b172a85 | 2058 | |
1da177e4 | 2059 | tu = file->private_data; |
53d2f744 | 2060 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
d11662f4 | 2061 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2062 | spin_lock_irq(&tu->qlock); |
2063 | while ((long)count - result >= unit) { | |
2064 | while (!tu->qused) { | |
ac6424b9 | 2065 | wait_queue_entry_t wait; |
1da177e4 LT |
2066 | |
2067 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
2068 | err = -EAGAIN; | |
4dff5c7b | 2069 | goto _error; |
1da177e4 LT |
2070 | } |
2071 | ||
2072 | set_current_state(TASK_INTERRUPTIBLE); | |
2073 | init_waitqueue_entry(&wait, current); | |
2074 | add_wait_queue(&tu->qchange_sleep, &wait); | |
2075 | ||
2076 | spin_unlock_irq(&tu->qlock); | |
d11662f4 | 2077 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 | 2078 | schedule(); |
d11662f4 | 2079 | mutex_lock(&tu->ioctl_lock); |
1da177e4 LT |
2080 | spin_lock_irq(&tu->qlock); |
2081 | ||
2082 | remove_wait_queue(&tu->qchange_sleep, &wait); | |
2083 | ||
230323da TI |
2084 | if (tu->disconnected) { |
2085 | err = -ENODEV; | |
4dff5c7b | 2086 | goto _error; |
230323da | 2087 | } |
1da177e4 LT |
2088 | if (signal_pending(current)) { |
2089 | err = -ERESTARTSYS; | |
4dff5c7b | 2090 | goto _error; |
1da177e4 LT |
2091 | } |
2092 | } | |
2093 | ||
4dff5c7b TI |
2094 | qhead = tu->qhead++; |
2095 | tu->qhead %= tu->queue_size; | |
3fa6993f | 2096 | tu->qused--; |
1da177e4 | 2097 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2098 | |
2099 | if (tu->tread) { | |
4dff5c7b TI |
2100 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
2101 | sizeof(struct snd_timer_tread))) | |
1da177e4 | 2102 | err = -EFAULT; |
1da177e4 | 2103 | } else { |
4dff5c7b TI |
2104 | if (copy_to_user(buffer, &tu->queue[qhead], |
2105 | sizeof(struct snd_timer_read))) | |
1da177e4 | 2106 | err = -EFAULT; |
1da177e4 LT |
2107 | } |
2108 | ||
1da177e4 | 2109 | spin_lock_irq(&tu->qlock); |
4dff5c7b TI |
2110 | if (err < 0) |
2111 | goto _error; | |
2112 | result += unit; | |
2113 | buffer += unit; | |
1da177e4 | 2114 | } |
1da177e4 | 2115 | _error: |
4dff5c7b | 2116 | spin_unlock_irq(&tu->qlock); |
d11662f4 | 2117 | mutex_unlock(&tu->ioctl_lock); |
1da177e4 LT |
2118 | return result > 0 ? result : err; |
2119 | } | |
2120 | ||
680ef72a | 2121 | static __poll_t snd_timer_user_poll(struct file *file, poll_table * wait) |
1da177e4 | 2122 | { |
680ef72a | 2123 | __poll_t mask; |
53d2f744 | 2124 | struct snd_timer_user *tu; |
1da177e4 LT |
2125 | |
2126 | tu = file->private_data; | |
2127 | ||
2128 | poll_wait(file, &tu->qchange_sleep, wait); | |
6b172a85 | 2129 | |
1da177e4 | 2130 | mask = 0; |
d7f910bf | 2131 | spin_lock_irq(&tu->qlock); |
1da177e4 | 2132 | if (tu->qused) |
a9a08845 | 2133 | mask |= EPOLLIN | EPOLLRDNORM; |
230323da | 2134 | if (tu->disconnected) |
a9a08845 | 2135 | mask |= EPOLLERR; |
d7f910bf | 2136 | spin_unlock_irq(&tu->qlock); |
1da177e4 LT |
2137 | |
2138 | return mask; | |
2139 | } | |
2140 | ||
2141 | #ifdef CONFIG_COMPAT | |
2142 | #include "timer_compat.c" | |
2143 | #else | |
2144 | #define snd_timer_user_ioctl_compat NULL | |
2145 | #endif | |
2146 | ||
9c2e08c5 | 2147 | static const struct file_operations snd_timer_f_ops = |
1da177e4 LT |
2148 | { |
2149 | .owner = THIS_MODULE, | |
2150 | .read = snd_timer_user_read, | |
2151 | .open = snd_timer_user_open, | |
2152 | .release = snd_timer_user_release, | |
02f4865f | 2153 | .llseek = no_llseek, |
1da177e4 LT |
2154 | .poll = snd_timer_user_poll, |
2155 | .unlocked_ioctl = snd_timer_user_ioctl, | |
2156 | .compat_ioctl = snd_timer_user_ioctl_compat, | |
2157 | .fasync = snd_timer_user_fasync, | |
2158 | }; | |
2159 | ||
7c35860d TI |
2160 | /* unregister the system timer */ |
2161 | static void snd_timer_free_all(void) | |
2162 | { | |
2163 | struct snd_timer *timer, *n; | |
2164 | ||
2165 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) | |
2166 | snd_timer_free(timer); | |
2167 | } | |
2168 | ||
89da061f TI |
2169 | static struct device timer_dev; |
2170 | ||
1da177e4 LT |
2171 | /* |
2172 | * ENTRY functions | |
2173 | */ | |
2174 | ||
1da177e4 LT |
2175 | static int __init alsa_timer_init(void) |
2176 | { | |
2177 | int err; | |
1da177e4 | 2178 | |
89da061f TI |
2179 | snd_device_initialize(&timer_dev, NULL); |
2180 | dev_set_name(&timer_dev, "timer"); | |
2181 | ||
1da177e4 | 2182 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
6b172a85 CL |
2183 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
2184 | "system timer"); | |
1da177e4 | 2185 | #endif |
e28563cc | 2186 | |
7c35860d TI |
2187 | err = snd_timer_register_system(); |
2188 | if (err < 0) { | |
cf74dcf3 | 2189 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
1ae0e4ce | 2190 | goto put_timer; |
7c35860d TI |
2191 | } |
2192 | ||
40a4b263 TI |
2193 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
2194 | &snd_timer_f_ops, NULL, &timer_dev); | |
7c35860d | 2195 | if (err < 0) { |
cf74dcf3 | 2196 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
7c35860d | 2197 | snd_timer_free_all(); |
1ae0e4ce | 2198 | goto put_timer; |
7c35860d TI |
2199 | } |
2200 | ||
e28563cc | 2201 | snd_timer_proc_init(); |
1da177e4 | 2202 | return 0; |
1ae0e4ce ME |
2203 | |
2204 | put_timer: | |
2205 | put_device(&timer_dev); | |
2206 | return err; | |
1da177e4 LT |
2207 | } |
2208 | ||
2209 | static void __exit alsa_timer_exit(void) | |
2210 | { | |
40a4b263 | 2211 | snd_unregister_device(&timer_dev); |
7c35860d | 2212 | snd_timer_free_all(); |
89da061f | 2213 | put_device(&timer_dev); |
e28563cc | 2214 | snd_timer_proc_done(); |
1da177e4 LT |
2215 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
2216 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); | |
2217 | #endif | |
2218 | } | |
2219 | ||
2220 | module_init(alsa_timer_init) | |
2221 | module_exit(alsa_timer_exit) |