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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Timers abstract layer
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02003 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/delay.h>
23#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/slab.h>
25#include <linux/time.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010026#include <linux/mutex.h>
Paul Gortmaker51990e82012-01-22 11:23:42 -050027#include <linux/device.h>
Paul Gortmaker65a77212011-07-15 13:13:37 -040028#include <linux/module.h>
Paulo Marques543537b2005-06-23 00:09:02 -070029#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <sound/core.h>
31#include <sound/timer.h>
32#include <sound/control.h>
33#include <sound/info.h>
34#include <sound/minors.h>
35#include <sound/initval.h>
36#include <linux/kmod.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Takashi Iwai8eeaa2f2014-02-10 09:48:47 +010038#if IS_ENABLED(CONFIG_SND_HRTIMER)
Clemens Ladisch109fef92010-11-18 09:53:54 +010039#define DEFAULT_TIMER_LIMIT 4
Takashi Iwai8eeaa2f2014-02-10 09:48:47 +010040#elif IS_ENABLED(CONFIG_SND_RTCTIMER)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define DEFAULT_TIMER_LIMIT 2
42#else
43#define DEFAULT_TIMER_LIMIT 1
44#endif
45
46static int timer_limit = DEFAULT_TIMER_LIMIT;
Jaroslav Kyselab751eef2007-12-13 10:19:42 +010047static int timer_tstamp_monotonic = 1;
Jaroslav Kyselac1017a42007-10-15 09:50:19 +020048MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>");
Linus Torvalds1da177e2005-04-16 15:20:36 -070049MODULE_DESCRIPTION("ALSA timer interface");
50MODULE_LICENSE("GPL");
51module_param(timer_limit, int, 0444);
52MODULE_PARM_DESC(timer_limit, "Maximum global timers in system.");
Jaroslav Kyselab751eef2007-12-13 10:19:42 +010053module_param(timer_tstamp_monotonic, int, 0444);
54MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default).");
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Kay Sievers03cfe6f2010-11-23 17:43:19 +010056MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER);
57MODULE_ALIAS("devname:snd/timer");
58
Takashi Iwai53d2f742005-11-17 13:56:05 +010059struct snd_timer_user {
60 struct snd_timer_instance *timeri;
Clemens Ladisch6b172a82005-10-12 17:20:21 +020061 int tread; /* enhanced read with timestamps and events */
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 unsigned long ticks;
63 unsigned long overrun;
64 int qhead;
65 int qtail;
66 int qused;
67 int queue_size;
Takashi Iwai230323d2016-01-21 17:19:31 +010068 bool disconnected;
Takashi Iwai53d2f742005-11-17 13:56:05 +010069 struct snd_timer_read *queue;
70 struct snd_timer_tread *tqueue;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 spinlock_t qlock;
72 unsigned long last_resolution;
73 unsigned int filter;
74 struct timespec tstamp; /* trigger tstamp */
75 wait_queue_head_t qchange_sleep;
76 struct fasync_struct *fasync;
Takashi Iwaiaf368022016-01-13 17:48:01 +010077 struct mutex ioctl_lock;
Takashi Iwai53d2f742005-11-17 13:56:05 +010078};
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80/* list of timers */
81static LIST_HEAD(snd_timer_list);
82
83/* list of slave instances */
84static LIST_HEAD(snd_timer_slave_list);
85
86/* lock for slave active lists */
87static DEFINE_SPINLOCK(slave_active_lock);
88
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010089static DEFINE_MUTEX(register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Takashi Iwai53d2f742005-11-17 13:56:05 +010091static int snd_timer_free(struct snd_timer *timer);
92static int snd_timer_dev_free(struct snd_device *device);
93static int snd_timer_dev_register(struct snd_device *device);
Takashi Iwaic4614822006-06-23 14:38:23 +020094static int snd_timer_dev_disconnect(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Takashi Iwai53d2f742005-11-17 13:56:05 +010096static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98/*
99 * create a timer instance with the given owner string.
100 * when timer is not NULL, increments the module counter
101 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100102static struct snd_timer_instance *snd_timer_instance_new(char *owner,
103 struct snd_timer *timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100105 struct snd_timer_instance *timeri;
Takashi Iwaica2c0962005-09-09 14:20:23 +0200106 timeri = kzalloc(sizeof(*timeri), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 if (timeri == NULL)
108 return NULL;
Paulo Marques543537b2005-06-23 00:09:02 -0700109 timeri->owner = kstrdup(owner, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 if (! timeri->owner) {
111 kfree(timeri);
112 return NULL;
113 }
114 INIT_LIST_HEAD(&timeri->open_list);
115 INIT_LIST_HEAD(&timeri->active_list);
116 INIT_LIST_HEAD(&timeri->ack_list);
117 INIT_LIST_HEAD(&timeri->slave_list_head);
118 INIT_LIST_HEAD(&timeri->slave_active_head);
119
120 timeri->timer = timer;
Clemens Ladischde242142005-10-12 17:12:31 +0200121 if (timer && !try_module_get(timer->module)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 kfree(timeri->owner);
123 kfree(timeri);
124 return NULL;
125 }
126
127 return timeri;
128}
129
130/*
131 * find a timer instance from the given timer id
132 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100133static struct snd_timer *snd_timer_find(struct snd_timer_id *tid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100135 struct snd_timer *timer = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Johannes Berg9244b2c2006-10-05 16:02:22 +0200137 list_for_each_entry(timer, &snd_timer_list, device_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 if (timer->tmr_class != tid->dev_class)
139 continue;
140 if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD ||
141 timer->tmr_class == SNDRV_TIMER_CLASS_PCM) &&
142 (timer->card == NULL ||
143 timer->card->number != tid->card))
144 continue;
145 if (timer->tmr_device != tid->device)
146 continue;
147 if (timer->tmr_subdevice != tid->subdevice)
148 continue;
149 return timer;
150 }
151 return NULL;
152}
153
Johannes Bergee2da992008-07-09 10:28:41 +0200154#ifdef CONFIG_MODULES
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Takashi Iwai53d2f742005-11-17 13:56:05 +0100156static void snd_timer_request(struct snd_timer_id *tid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 switch (tid->dev_class) {
159 case SNDRV_TIMER_CLASS_GLOBAL:
160 if (tid->device < timer_limit)
161 request_module("snd-timer-%i", tid->device);
162 break;
163 case SNDRV_TIMER_CLASS_CARD:
164 case SNDRV_TIMER_CLASS_PCM:
165 if (tid->card < snd_ecards_limit)
166 request_module("snd-card-%i", tid->card);
167 break;
168 default:
169 break;
170 }
171}
172
173#endif
174
175/*
176 * look for a master instance matching with the slave id of the given slave.
177 * when found, relink the open_link of the slave.
178 *
179 * call this with register_mutex down.
180 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100181static void snd_timer_check_slave(struct snd_timer_instance *slave)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100183 struct snd_timer *timer;
184 struct snd_timer_instance *master;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 /* FIXME: it's really dumb to look up all entries.. */
Johannes Berg9244b2c2006-10-05 16:02:22 +0200187 list_for_each_entry(timer, &snd_timer_list, device_list) {
188 list_for_each_entry(master, &timer->open_list_head, open_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 if (slave->slave_class == master->slave_class &&
190 slave->slave_id == master->slave_id) {
Nicolas Kaiser5b7c7572011-03-16 17:10:11 +0100191 list_move_tail(&slave->open_list,
192 &master->slave_list_head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 spin_lock_irq(&slave_active_lock);
194 slave->master = master;
195 slave->timer = master->timer;
196 spin_unlock_irq(&slave_active_lock);
197 return;
198 }
199 }
200 }
201}
202
203/*
204 * look for slave instances matching with the slave id of the given master.
205 * when found, relink the open_link of slaves.
206 *
207 * call this with register_mutex down.
208 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100209static void snd_timer_check_master(struct snd_timer_instance *master)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
Johannes Berg9244b2c2006-10-05 16:02:22 +0200211 struct snd_timer_instance *slave, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213 /* check all pending slaves */
Johannes Berg9244b2c2006-10-05 16:02:22 +0200214 list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 if (slave->slave_class == master->slave_class &&
216 slave->slave_id == master->slave_id) {
Johannes Berg9244b2c2006-10-05 16:02:22 +0200217 list_move_tail(&slave->open_list, &master->slave_list_head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 spin_lock_irq(&slave_active_lock);
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100219 spin_lock(&master->timer->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 slave->master = master;
221 slave->timer = master->timer;
222 if (slave->flags & SNDRV_TIMER_IFLG_RUNNING)
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200223 list_add_tail(&slave->active_list,
224 &master->slave_active_head);
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100225 spin_unlock(&master->timer->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 spin_unlock_irq(&slave_active_lock);
227 }
228 }
229}
230
231/*
232 * open a timer instance
233 * when opening a master, the slave id must be here given.
234 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100235int snd_timer_open(struct snd_timer_instance **ti,
236 char *owner, struct snd_timer_id *tid,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 unsigned int slave_id)
238{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100239 struct snd_timer *timer;
240 struct snd_timer_instance *timeri = NULL;
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) {
243 /* open a slave instance */
244 if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE ||
245 tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) {
Takashi Iwaicf74dcf2014-02-04 18:22:39 +0100246 pr_debug("ALSA: timer: invalid slave class %i\n",
247 tid->dev_sclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 return -EINVAL;
249 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100250 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 timeri = snd_timer_instance_new(owner, NULL);
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200252 if (!timeri) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100253 mutex_unlock(&register_mutex);
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200254 return -ENOMEM;
255 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 timeri->slave_class = tid->dev_sclass;
257 timeri->slave_id = tid->device;
258 timeri->flags |= SNDRV_TIMER_IFLG_SLAVE;
259 list_add_tail(&timeri->open_list, &snd_timer_slave_list);
260 snd_timer_check_slave(timeri);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100261 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 *ti = timeri;
263 return 0;
264 }
265
266 /* open a master instance */
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100267 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 timer = snd_timer_find(tid);
Johannes Bergee2da992008-07-09 10:28:41 +0200269#ifdef CONFIG_MODULES
270 if (!timer) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100271 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 snd_timer_request(tid);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100273 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 timer = snd_timer_find(tid);
275 }
276#endif
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200277 if (!timer) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100278 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 return -ENODEV;
280 }
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200281 if (!list_empty(&timer->open_list_head)) {
282 timeri = list_entry(timer->open_list_head.next,
Takashi Iwai53d2f742005-11-17 13:56:05 +0100283 struct snd_timer_instance, open_list);
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200284 if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100285 mutex_unlock(&register_mutex);
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200286 return -EBUSY;
287 }
288 }
289 timeri = snd_timer_instance_new(owner, timer);
290 if (!timeri) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100291 mutex_unlock(&register_mutex);
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200292 return -ENOMEM;
293 }
Takashi Iwai230323d2016-01-21 17:19:31 +0100294 /* take a card refcount for safe disconnection */
295 if (timer->card)
296 get_device(&timer->card->card_dev);
Clemens Ladisch2fd43d12005-10-12 17:10:35 +0200297 timeri->slave_class = tid->dev_sclass;
298 timeri->slave_id = slave_id;
299 if (list_empty(&timer->open_list_head) && timer->hw.open)
300 timer->hw.open(timer);
301 list_add_tail(&timeri->open_list, &timer->open_list_head);
302 snd_timer_check_master(timeri);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100303 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 *ti = timeri;
305 return 0;
306}
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308/*
309 * close a timer instance
310 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100311int snd_timer_close(struct snd_timer_instance *timeri)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100313 struct snd_timer *timer = NULL;
Johannes Berg9244b2c2006-10-05 16:02:22 +0200314 struct snd_timer_instance *slave, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
Takashi Iwai00728892008-08-14 07:51:57 +0200316 if (snd_BUG_ON(!timeri))
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200317 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100319 mutex_lock(&register_mutex);
320 list_del(&timeri->open_list);
321
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 /* force to stop the timer */
323 snd_timer_stop(timeri);
324
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100325 timer = timeri->timer;
326 if (timer) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 /* wait, until the active callback is finished */
328 spin_lock_irq(&timer->lock);
329 while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) {
330 spin_unlock_irq(&timer->lock);
331 udelay(10);
332 spin_lock_irq(&timer->lock);
333 }
334 spin_unlock_irq(&timer->lock);
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 /* remove slave links */
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100337 spin_lock_irq(&slave_active_lock);
338 spin_lock(&timer->lock);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200339 list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head,
340 open_list) {
Johannes Berg9244b2c2006-10-05 16:02:22 +0200341 list_move_tail(&slave->open_list, &snd_timer_slave_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 slave->master = NULL;
343 slave->timer = NULL;
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100344 list_del_init(&slave->ack_list);
345 list_del_init(&slave->active_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 }
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100347 spin_unlock(&timer->lock);
348 spin_unlock_irq(&slave_active_lock);
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100349
350 /* slave doesn't need to release timer resources below */
351 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
352 timer = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 }
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 if (timeri->private_free)
356 timeri->private_free(timeri);
357 kfree(timeri->owner);
358 kfree(timeri);
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100359
360 if (timer) {
361 if (list_empty(&timer->open_list_head) && timer->hw.close)
362 timer->hw.close(timer);
363 /* release a card refcount for safe disconnection */
364 if (timer->card)
365 put_device(&timer->card->card_dev);
Clemens Ladischde242142005-10-12 17:12:31 +0200366 module_put(timer->module);
Takashi Iwai9984d1b2016-02-10 11:53:30 +0100367 }
368
369 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 return 0;
371}
372
Takashi Iwai53d2f742005-11-17 13:56:05 +0100373unsigned long snd_timer_resolution(struct snd_timer_instance *timeri)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100375 struct snd_timer * timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377 if (timeri == NULL)
378 return 0;
379 if ((timer = timeri->timer) != NULL) {
380 if (timer->hw.c_resolution)
381 return timer->hw.c_resolution(timer);
382 return timer->hw.resolution;
383 }
384 return 0;
385}
386
Takashi Iwai53d2f742005-11-17 13:56:05 +0100387static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100389 struct snd_timer *timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 unsigned long resolution = 0;
Takashi Iwai53d2f742005-11-17 13:56:05 +0100391 struct snd_timer_instance *ts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 struct timespec tstamp;
393
Jaroslav Kyselab751eef2007-12-13 10:19:42 +0100394 if (timer_tstamp_monotonic)
Thomas Gleixner26204e02014-06-11 23:59:14 +0000395 ktime_get_ts(&tstamp);
Jaroslav Kyselab751eef2007-12-13 10:19:42 +0100396 else
397 getnstimeofday(&tstamp);
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200398 if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START ||
399 event > SNDRV_TIMER_EVENT_PAUSE))
400 return;
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200401 if (event == SNDRV_TIMER_EVENT_START ||
402 event == SNDRV_TIMER_EVENT_CONTINUE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 resolution = snd_timer_resolution(ti);
404 if (ti->ccallback)
Jaroslav Kyselab30477d2010-03-03 11:05:55 +0100405 ti->ccallback(ti, event, &tstamp, resolution);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 if (ti->flags & SNDRV_TIMER_IFLG_SLAVE)
407 return;
408 timer = ti->timer;
409 if (timer == NULL)
410 return;
411 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
412 return;
Johannes Berg9244b2c2006-10-05 16:02:22 +0200413 list_for_each_entry(ts, &ti->slave_active_head, active_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 if (ts->ccallback)
Takashi Iwai117159f2016-02-08 17:36:25 +0100415 ts->ccallback(ts, event + 100, &tstamp, resolution);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416}
417
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100418/* start/continue a master timer */
419static int snd_timer_start1(struct snd_timer_instance *timeri,
420 bool start, unsigned long ticks)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421{
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100422 struct snd_timer *timer;
423 int result;
424 unsigned long flags;
425
426 timer = timeri->timer;
427 if (!timer)
428 return -EINVAL;
429
430 spin_lock_irqsave(&timer->lock, flags);
431 if (timer->card && timer->card->shutdown) {
432 result = -ENODEV;
433 goto unlock;
434 }
435 if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING |
436 SNDRV_TIMER_IFLG_START)) {
437 result = -EBUSY;
438 goto unlock;
439 }
440
441 if (start)
442 timeri->ticks = timeri->cticks = ticks;
443 else if (!timeri->cticks)
444 timeri->cticks = 1;
445 timeri->pticks = 0;
446
Nicolas Kaiser5b7c7572011-03-16 17:10:11 +0100447 list_move_tail(&timeri->active_list, &timer->active_list_head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 if (timer->running) {
449 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
450 goto __start_now;
451 timer->flags |= SNDRV_TIMER_FLG_RESCHED;
452 timeri->flags |= SNDRV_TIMER_IFLG_START;
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100453 result = 1; /* delayed start */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 } else {
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100455 if (start)
456 timer->sticks = ticks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 timer->hw.start(timer);
458 __start_now:
459 timer->running++;
460 timeri->flags |= SNDRV_TIMER_IFLG_RUNNING;
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100461 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 }
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100463 snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START :
464 SNDRV_TIMER_EVENT_CONTINUE);
465 unlock:
466 spin_unlock_irqrestore(&timer->lock, flags);
467 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468}
469
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100470/* start/continue a slave timer */
471static int snd_timer_start_slave(struct snd_timer_instance *timeri,
472 bool start)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473{
474 unsigned long flags;
475
476 spin_lock_irqsave(&slave_active_lock, flags);
Takashi Iwaif784beb2016-01-30 23:09:08 +0100477 if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) {
478 spin_unlock_irqrestore(&slave_active_lock, flags);
479 return -EBUSY;
480 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 timeri->flags |= SNDRV_TIMER_IFLG_RUNNING;
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100482 if (timeri->master && timeri->timer) {
483 spin_lock(&timeri->timer->lock);
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200484 list_add_tail(&timeri->active_list,
485 &timeri->master->slave_active_head);
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100486 snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START :
487 SNDRV_TIMER_EVENT_CONTINUE);
Takashi Iwaib5a663a2016-01-14 16:30:58 +0100488 spin_unlock(&timeri->timer->lock);
489 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 spin_unlock_irqrestore(&slave_active_lock, flags);
491 return 1; /* delayed start */
492}
493
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100494/* stop/pause a master timer */
495static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100497 struct snd_timer *timer;
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100498 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 unsigned long flags;
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 timer = timeri->timer;
502 if (!timer)
503 return -EINVAL;
504 spin_lock_irqsave(&timer->lock, flags);
Takashi Iwaif784beb2016-01-30 23:09:08 +0100505 if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING |
506 SNDRV_TIMER_IFLG_START))) {
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100507 result = -EBUSY;
508 goto unlock;
Takashi Iwaif784beb2016-01-30 23:09:08 +0100509 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 list_del_init(&timeri->ack_list);
511 list_del_init(&timeri->active_list);
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100512 if (timer->card && timer->card->shutdown)
513 goto unlock;
514 if (stop) {
515 timeri->cticks = timeri->ticks;
516 timeri->pticks = 0;
Takashi Iwai230323d2016-01-21 17:19:31 +0100517 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) &&
519 !(--timer->running)) {
520 timer->hw.stop(timer);
521 if (timer->flags & SNDRV_TIMER_FLG_RESCHED) {
522 timer->flags &= ~SNDRV_TIMER_FLG_RESCHED;
523 snd_timer_reschedule(timer, 0);
524 if (timer->flags & SNDRV_TIMER_FLG_CHANGE) {
525 timer->flags &= ~SNDRV_TIMER_FLG_CHANGE;
526 timer->hw.start(timer);
527 }
528 }
529 }
Takashi Iwaic3b16812016-01-14 17:01:46 +0100530 timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START);
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100531 snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP :
532 SNDRV_TIMER_EVENT_CONTINUE);
533 unlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 spin_unlock_irqrestore(&timer->lock, flags);
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100535 return result;
536}
537
538/* stop/pause a slave timer */
539static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop)
540{
541 unsigned long flags;
542
543 spin_lock_irqsave(&slave_active_lock, flags);
544 if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) {
545 spin_unlock_irqrestore(&slave_active_lock, flags);
546 return -EBUSY;
547 }
548 timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
549 if (timeri->timer) {
550 spin_lock(&timeri->timer->lock);
551 list_del_init(&timeri->ack_list);
552 list_del_init(&timeri->active_list);
553 snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP :
554 SNDRV_TIMER_EVENT_CONTINUE);
555 spin_unlock(&timeri->timer->lock);
556 }
557 spin_unlock_irqrestore(&slave_active_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 return 0;
559}
560
561/*
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100562 * start the timer instance
563 */
564int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks)
565{
566 if (timeri == NULL || ticks < 1)
567 return -EINVAL;
568 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
569 return snd_timer_start_slave(timeri, true);
570 else
571 return snd_timer_start1(timeri, true, ticks);
572}
573
574/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 * stop the timer instance.
576 *
577 * do not call this from the timer callback!
578 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100579int snd_timer_stop(struct snd_timer_instance *timeri)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580{
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100581 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
582 return snd_timer_stop_slave(timeri, true);
583 else
584 return snd_timer_stop1(timeri, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
586
587/*
588 * start again.. the tick is kept.
589 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100590int snd_timer_continue(struct snd_timer_instance *timeri)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100593 return snd_timer_start_slave(timeri, false);
594 else
595 return snd_timer_start1(timeri, false, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596}
597
598/*
599 * pause.. remember the ticks left
600 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100601int snd_timer_pause(struct snd_timer_instance * timeri)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
Takashi Iwaif65e0d22016-02-10 12:47:03 +0100603 if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
604 return snd_timer_stop_slave(timeri, false);
605 else
606 return snd_timer_stop1(timeri, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607}
608
609/*
610 * reschedule the timer
611 *
612 * start pending instances and check the scheduling ticks.
613 * when the scheduling ticks is changed set CHANGE flag to reprogram the timer.
614 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100615static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100617 struct snd_timer_instance *ti;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 unsigned long ticks = ~0UL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Johannes Berg9244b2c2006-10-05 16:02:22 +0200620 list_for_each_entry(ti, &timer->active_list_head, active_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 if (ti->flags & SNDRV_TIMER_IFLG_START) {
622 ti->flags &= ~SNDRV_TIMER_IFLG_START;
623 ti->flags |= SNDRV_TIMER_IFLG_RUNNING;
624 timer->running++;
625 }
626 if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) {
627 if (ticks > ti->cticks)
628 ticks = ti->cticks;
629 }
630 }
631 if (ticks == ~0UL) {
632 timer->flags &= ~SNDRV_TIMER_FLG_RESCHED;
633 return;
634 }
635 if (ticks > timer->hw.ticks)
636 ticks = timer->hw.ticks;
637 if (ticks_left != ticks)
638 timer->flags |= SNDRV_TIMER_FLG_CHANGE;
639 timer->sticks = ticks;
640}
641
642/*
643 * timer tasklet
644 *
645 */
646static void snd_timer_tasklet(unsigned long arg)
647{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100648 struct snd_timer *timer = (struct snd_timer *) arg;
649 struct snd_timer_instance *ti;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 struct list_head *p;
651 unsigned long resolution, ticks;
Takashi Iwai2999ff52006-07-05 17:16:58 +0200652 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Takashi Iwai230323d2016-01-21 17:19:31 +0100654 if (timer->card && timer->card->shutdown)
655 return;
656
Takashi Iwai2999ff52006-07-05 17:16:58 +0200657 spin_lock_irqsave(&timer->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 /* now process all callbacks */
659 while (!list_empty(&timer->sack_list_head)) {
660 p = timer->sack_list_head.next; /* get first item */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100661 ti = list_entry(p, struct snd_timer_instance, ack_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663 /* remove from ack_list and make empty */
664 list_del_init(p);
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 ticks = ti->pticks;
667 ti->pticks = 0;
668 resolution = ti->resolution;
669
670 ti->flags |= SNDRV_TIMER_IFLG_CALLBACK;
671 spin_unlock(&timer->lock);
672 if (ti->callback)
673 ti->callback(ti, resolution, ticks);
674 spin_lock(&timer->lock);
675 ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK;
676 }
Takashi Iwai2999ff52006-07-05 17:16:58 +0200677 spin_unlock_irqrestore(&timer->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678}
679
680/*
681 * timer interrupt
682 *
683 * ticks_left is usually equal to timer->sticks.
684 *
685 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100686void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687{
Johannes Berg9244b2c2006-10-05 16:02:22 +0200688 struct snd_timer_instance *ti, *ts, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 unsigned long resolution, ticks;
Johannes Berg9244b2c2006-10-05 16:02:22 +0200690 struct list_head *p, *ack_list_head;
Takashi Iwaib32425a2005-11-18 18:52:14 +0100691 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 int use_tasklet = 0;
693
694 if (timer == NULL)
695 return;
696
Takashi Iwai230323d2016-01-21 17:19:31 +0100697 if (timer->card && timer->card->shutdown)
698 return;
699
Takashi Iwaib32425a2005-11-18 18:52:14 +0100700 spin_lock_irqsave(&timer->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702 /* remember the current resolution */
703 if (timer->hw.c_resolution)
704 resolution = timer->hw.c_resolution(timer);
705 else
706 resolution = timer->hw.resolution;
707
708 /* loop for all active instances
Johannes Berg9244b2c2006-10-05 16:02:22 +0200709 * Here we cannot use list_for_each_entry because the active_list of a
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200710 * processed instance is relinked to done_list_head before the callback
711 * is called.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 */
Johannes Berg9244b2c2006-10-05 16:02:22 +0200713 list_for_each_entry_safe(ti, tmp, &timer->active_list_head,
714 active_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING))
716 continue;
717 ti->pticks += ticks_left;
718 ti->resolution = resolution;
719 if (ti->cticks < ticks_left)
720 ti->cticks = 0;
721 else
722 ti->cticks -= ticks_left;
723 if (ti->cticks) /* not expired */
724 continue;
725 if (ti->flags & SNDRV_TIMER_IFLG_AUTO) {
726 ti->cticks = ti->ticks;
727 } else {
728 ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
Takashi Iwai094fd3b2016-02-04 17:06:13 +0100729 --timer->running;
730 list_del_init(&ti->active_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 }
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200732 if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||
733 (ti->flags & SNDRV_TIMER_IFLG_FAST))
734 ack_list_head = &timer->ack_list_head;
735 else
736 ack_list_head = &timer->sack_list_head;
737 if (list_empty(&ti->ack_list))
738 list_add_tail(&ti->ack_list, ack_list_head);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200739 list_for_each_entry(ts, &ti->slave_active_head, active_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 ts->pticks = ti->pticks;
741 ts->resolution = resolution;
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200742 if (list_empty(&ts->ack_list))
743 list_add_tail(&ts->ack_list, ack_list_head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 }
745 }
746 if (timer->flags & SNDRV_TIMER_FLG_RESCHED)
Clemens Ladischcd93fe42006-07-17 16:53:57 +0200747 snd_timer_reschedule(timer, timer->sticks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 if (timer->running) {
749 if (timer->hw.flags & SNDRV_TIMER_HW_STOP) {
750 timer->hw.stop(timer);
751 timer->flags |= SNDRV_TIMER_FLG_CHANGE;
752 }
753 if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) ||
754 (timer->flags & SNDRV_TIMER_FLG_CHANGE)) {
755 /* restart timer */
756 timer->flags &= ~SNDRV_TIMER_FLG_CHANGE;
757 timer->hw.start(timer);
758 }
759 } else {
760 timer->hw.stop(timer);
761 }
762
763 /* now process all fast callbacks */
764 while (!list_empty(&timer->ack_list_head)) {
765 p = timer->ack_list_head.next; /* get first item */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100766 ti = list_entry(p, struct snd_timer_instance, ack_list);
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200767
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 /* remove from ack_list and make empty */
769 list_del_init(p);
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 ticks = ti->pticks;
772 ti->pticks = 0;
773
774 ti->flags |= SNDRV_TIMER_IFLG_CALLBACK;
775 spin_unlock(&timer->lock);
776 if (ti->callback)
777 ti->callback(ti, resolution, ticks);
778 spin_lock(&timer->lock);
779 ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK;
780 }
781
782 /* do we have any slow callbacks? */
783 use_tasklet = !list_empty(&timer->sack_list_head);
Takashi Iwaib32425a2005-11-18 18:52:14 +0100784 spin_unlock_irqrestore(&timer->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
786 if (use_tasklet)
Takashi Iwai1f041282008-12-18 12:17:55 +0100787 tasklet_schedule(&timer->task_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788}
789
790/*
791
792 */
793
Takashi Iwai53d2f742005-11-17 13:56:05 +0100794int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
795 struct snd_timer **rtimer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100797 struct snd_timer *timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 int err;
Takashi Iwai53d2f742005-11-17 13:56:05 +0100799 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 .dev_free = snd_timer_dev_free,
801 .dev_register = snd_timer_dev_register,
Takashi Iwaic4614822006-06-23 14:38:23 +0200802 .dev_disconnect = snd_timer_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 };
804
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200805 if (snd_BUG_ON(!tid))
806 return -EINVAL;
807 if (rtimer)
808 *rtimer = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +0200809 timer = kzalloc(sizeof(*timer), GFP_KERNEL);
Takashi Iwaiec0e9932015-03-10 15:42:14 +0100810 if (!timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 return -ENOMEM;
812 timer->tmr_class = tid->dev_class;
813 timer->card = card;
814 timer->tmr_device = tid->device;
815 timer->tmr_subdevice = tid->subdevice;
816 if (id)
817 strlcpy(timer->id, id, sizeof(timer->id));
818 INIT_LIST_HEAD(&timer->device_list);
819 INIT_LIST_HEAD(&timer->open_list_head);
820 INIT_LIST_HEAD(&timer->active_list_head);
821 INIT_LIST_HEAD(&timer->ack_list_head);
822 INIT_LIST_HEAD(&timer->sack_list_head);
823 spin_lock_init(&timer->lock);
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200824 tasklet_init(&timer->task_queue, snd_timer_tasklet,
825 (unsigned long)timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 if (card != NULL) {
Clemens Ladischde242142005-10-12 17:12:31 +0200827 timer->module = card->module;
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200828 err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops);
829 if (err < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 snd_timer_free(timer);
831 return err;
832 }
833 }
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200834 if (rtimer)
835 *rtimer = timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 return 0;
837}
838
Takashi Iwai53d2f742005-11-17 13:56:05 +0100839static int snd_timer_free(struct snd_timer *timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840{
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200841 if (!timer)
842 return 0;
Takashi Iwaic4614822006-06-23 14:38:23 +0200843
844 mutex_lock(&register_mutex);
845 if (! list_empty(&timer->open_list_head)) {
846 struct list_head *p, *n;
847 struct snd_timer_instance *ti;
Takashi Iwaicf74dcf2014-02-04 18:22:39 +0100848 pr_warn("ALSA: timer %p is busy?\n", timer);
Takashi Iwaic4614822006-06-23 14:38:23 +0200849 list_for_each_safe(p, n, &timer->open_list_head) {
850 list_del_init(p);
851 ti = list_entry(p, struct snd_timer_instance, open_list);
852 ti->timer = NULL;
853 }
854 }
855 list_del(&timer->device_list);
856 mutex_unlock(&register_mutex);
857
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 if (timer->private_free)
859 timer->private_free(timer);
860 kfree(timer);
861 return 0;
862}
863
Takashi Iwai53d2f742005-11-17 13:56:05 +0100864static int snd_timer_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100866 struct snd_timer *timer = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 return snd_timer_free(timer);
868}
869
Takashi Iwai53d2f742005-11-17 13:56:05 +0100870static int snd_timer_dev_register(struct snd_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100872 struct snd_timer *timer = dev->device_data;
873 struct snd_timer *timer1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200875 if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop))
876 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) &&
878 !timer->hw.resolution && timer->hw.c_resolution == NULL)
879 return -EINVAL;
880
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100881 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200882 list_for_each_entry(timer1, &snd_timer_list, device_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 if (timer1->tmr_class > timer->tmr_class)
884 break;
885 if (timer1->tmr_class < timer->tmr_class)
886 continue;
887 if (timer1->card && timer->card) {
888 if (timer1->card->number > timer->card->number)
889 break;
890 if (timer1->card->number < timer->card->number)
891 continue;
892 }
893 if (timer1->tmr_device > timer->tmr_device)
894 break;
895 if (timer1->tmr_device < timer->tmr_device)
896 continue;
897 if (timer1->tmr_subdevice > timer->tmr_subdevice)
898 break;
899 if (timer1->tmr_subdevice < timer->tmr_subdevice)
900 continue;
901 /* conflicts.. */
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100902 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 return -EBUSY;
904 }
Johannes Berg9244b2c2006-10-05 16:02:22 +0200905 list_add_tail(&timer->device_list, &timer1->device_list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100906 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 return 0;
908}
909
Takashi Iwaic4614822006-06-23 14:38:23 +0200910static int snd_timer_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100912 struct snd_timer *timer = device->device_data;
Takashi Iwai230323d2016-01-21 17:19:31 +0100913 struct snd_timer_instance *ti;
914
Takashi Iwaic4614822006-06-23 14:38:23 +0200915 mutex_lock(&register_mutex);
916 list_del_init(&timer->device_list);
Takashi Iwai230323d2016-01-21 17:19:31 +0100917 /* wake up pending sleepers */
918 list_for_each_entry(ti, &timer->open_list_head, open_list) {
Takashi Iwai40ed94442016-01-21 17:43:08 +0100919 if (ti->disconnect)
920 ti->disconnect(ti);
Takashi Iwai230323d2016-01-21 17:19:31 +0100921 }
Takashi Iwaic4614822006-06-23 14:38:23 +0200922 mutex_unlock(&register_mutex);
923 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924}
925
Takashi Iwai53d2f742005-11-17 13:56:05 +0100926void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927{
928 unsigned long flags;
929 unsigned long resolution = 0;
Takashi Iwai53d2f742005-11-17 13:56:05 +0100930 struct snd_timer_instance *ti, *ts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
Takashi Iwai230323d2016-01-21 17:19:31 +0100932 if (timer->card && timer->card->shutdown)
933 return;
Takashi Iwai7c22f1a2005-10-10 11:46:31 +0200934 if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))
935 return;
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200936 if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART ||
937 event > SNDRV_TIMER_EVENT_MRESUME))
938 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 spin_lock_irqsave(&timer->lock, flags);
Jaroslav Kyselaa501dfa2005-08-16 11:09:05 +0200940 if (event == SNDRV_TIMER_EVENT_MSTART ||
941 event == SNDRV_TIMER_EVENT_MCONTINUE ||
942 event == SNDRV_TIMER_EVENT_MRESUME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 if (timer->hw.c_resolution)
944 resolution = timer->hw.c_resolution(timer);
945 else
946 resolution = timer->hw.resolution;
947 }
Johannes Berg9244b2c2006-10-05 16:02:22 +0200948 list_for_each_entry(ti, &timer->active_list_head, active_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 if (ti->ccallback)
950 ti->ccallback(ti, event, tstamp, resolution);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200951 list_for_each_entry(ts, &ti->slave_active_head, active_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 if (ts->ccallback)
953 ts->ccallback(ts, event, tstamp, resolution);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 }
955 spin_unlock_irqrestore(&timer->lock, flags);
956}
957
958/*
959 * exported functions for global timers
960 */
Takashi Iwai53d2f742005-11-17 13:56:05 +0100961int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100963 struct snd_timer_id tid;
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL;
966 tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
967 tid.card = -1;
968 tid.device = device;
969 tid.subdevice = 0;
970 return snd_timer_new(NULL, id, &tid, rtimer);
971}
972
Takashi Iwai53d2f742005-11-17 13:56:05 +0100973int snd_timer_global_free(struct snd_timer *timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974{
975 return snd_timer_free(timer);
976}
977
Takashi Iwai53d2f742005-11-17 13:56:05 +0100978int snd_timer_global_register(struct snd_timer *timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979{
Takashi Iwai53d2f742005-11-17 13:56:05 +0100980 struct snd_device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
982 memset(&dev, 0, sizeof(dev));
983 dev.device_data = timer;
984 return snd_timer_dev_register(&dev);
985}
986
Clemens Ladisch6b172a82005-10-12 17:20:21 +0200987/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 * System timer
989 */
990
991struct snd_timer_system_private {
992 struct timer_list tlist;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 unsigned long last_expires;
994 unsigned long last_jiffies;
995 unsigned long correction;
996};
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998static void snd_timer_s_function(unsigned long data)
999{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001000 struct snd_timer *timer = (struct snd_timer *)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 struct snd_timer_system_private *priv = timer->private_data;
1002 unsigned long jiff = jiffies;
1003 if (time_after(jiff, priv->last_expires))
Clemens Ladisch6ed5eff2006-07-17 16:51:37 +02001004 priv->correction += (long)jiff - (long)priv->last_expires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies);
1006}
1007
Takashi Iwai53d2f742005-11-17 13:56:05 +01001008static int snd_timer_s_start(struct snd_timer * timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009{
1010 struct snd_timer_system_private *priv;
1011 unsigned long njiff;
1012
1013 priv = (struct snd_timer_system_private *) timer->private_data;
1014 njiff = (priv->last_jiffies = jiffies);
1015 if (priv->correction > timer->sticks - 1) {
1016 priv->correction -= timer->sticks - 1;
1017 njiff++;
1018 } else {
1019 njiff += timer->sticks - priv->correction;
Clemens Ladisch17f48ec2006-07-17 16:50:56 +02001020 priv->correction = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 }
1022 priv->last_expires = priv->tlist.expires = njiff;
1023 add_timer(&priv->tlist);
1024 return 0;
1025}
1026
Takashi Iwai53d2f742005-11-17 13:56:05 +01001027static int snd_timer_s_stop(struct snd_timer * timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028{
1029 struct snd_timer_system_private *priv;
1030 unsigned long jiff;
1031
1032 priv = (struct snd_timer_system_private *) timer->private_data;
1033 del_timer(&priv->tlist);
1034 jiff = jiffies;
1035 if (time_before(jiff, priv->last_expires))
1036 timer->sticks = priv->last_expires - jiff;
1037 else
1038 timer->sticks = 1;
Clemens Ladischde2696d2006-07-17 16:52:09 +02001039 priv->correction = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 return 0;
1041}
1042
Takashi Iwaif1463572016-02-02 14:14:10 +01001043static int snd_timer_s_close(struct snd_timer *timer)
1044{
1045 struct snd_timer_system_private *priv;
1046
1047 priv = (struct snd_timer_system_private *)timer->private_data;
1048 del_timer_sync(&priv->tlist);
1049 return 0;
1050}
1051
Takashi Iwai53d2f742005-11-17 13:56:05 +01001052static struct snd_timer_hardware snd_timer_system =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053{
1054 .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET,
1055 .resolution = 1000000000L / HZ,
1056 .ticks = 10000000L,
Takashi Iwaif1463572016-02-02 14:14:10 +01001057 .close = snd_timer_s_close,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 .start = snd_timer_s_start,
1059 .stop = snd_timer_s_stop
1060};
1061
Takashi Iwai53d2f742005-11-17 13:56:05 +01001062static void snd_timer_free_system(struct snd_timer *timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063{
1064 kfree(timer->private_data);
1065}
1066
1067static int snd_timer_register_system(void)
1068{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001069 struct snd_timer *timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 struct snd_timer_system_private *priv;
1071 int err;
1072
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001073 err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer);
1074 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 return err;
1076 strcpy(timer->name, "system timer");
1077 timer->hw = snd_timer_system;
Takashi Iwaica2c0962005-09-09 14:20:23 +02001078 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 if (priv == NULL) {
1080 snd_timer_free(timer);
1081 return -ENOMEM;
1082 }
Takashi Iwaif169c102015-01-19 11:26:25 +01001083 setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 timer->private_data = priv;
1085 timer->private_free = snd_timer_free_system;
1086 return snd_timer_global_register(timer);
1087}
1088
Jie Yangcd6a6502015-05-27 19:45:45 +08001089#ifdef CONFIG_SND_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090/*
1091 * Info interface
1092 */
1093
Takashi Iwai53d2f742005-11-17 13:56:05 +01001094static void snd_timer_proc_read(struct snd_info_entry *entry,
1095 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001097 struct snd_timer *timer;
1098 struct snd_timer_instance *ti;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001100 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +02001101 list_for_each_entry(timer, &snd_timer_list, device_list) {
Takashi Iwai230323d2016-01-21 17:19:31 +01001102 if (timer->card && timer->card->shutdown)
1103 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 switch (timer->tmr_class) {
1105 case SNDRV_TIMER_CLASS_GLOBAL:
1106 snd_iprintf(buffer, "G%i: ", timer->tmr_device);
1107 break;
1108 case SNDRV_TIMER_CLASS_CARD:
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001109 snd_iprintf(buffer, "C%i-%i: ",
1110 timer->card->number, timer->tmr_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 break;
1112 case SNDRV_TIMER_CLASS_PCM:
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001113 snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number,
1114 timer->tmr_device, timer->tmr_subdevice);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 break;
1116 default:
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001117 snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class,
1118 timer->card ? timer->card->number : -1,
1119 timer->tmr_device, timer->tmr_subdevice);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 }
1121 snd_iprintf(buffer, "%s :", timer->name);
1122 if (timer->hw.resolution)
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001123 snd_iprintf(buffer, " %lu.%03luus (%lu ticks)",
1124 timer->hw.resolution / 1000,
1125 timer->hw.resolution % 1000,
1126 timer->hw.ticks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
1128 snd_iprintf(buffer, " SLAVE");
1129 snd_iprintf(buffer, "\n");
Johannes Berg9244b2c2006-10-05 16:02:22 +02001130 list_for_each_entry(ti, &timer->open_list_head, open_list)
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001131 snd_iprintf(buffer, " Client %s : %s\n",
1132 ti->owner ? ti->owner : "unknown",
1133 ti->flags & (SNDRV_TIMER_IFLG_START |
1134 SNDRV_TIMER_IFLG_RUNNING)
1135 ? "running" : "stopped");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001137 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138}
1139
Takashi Iwai6581f4e2006-05-17 17:14:51 +02001140static struct snd_info_entry *snd_timer_proc_entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +01001141
1142static void __init snd_timer_proc_init(void)
1143{
1144 struct snd_info_entry *entry;
1145
1146 entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL);
1147 if (entry != NULL) {
Takashi Iwaie28563c2005-12-01 10:42:42 +01001148 entry->c.text.read = snd_timer_proc_read;
1149 if (snd_info_register(entry) < 0) {
1150 snd_info_free_entry(entry);
1151 entry = NULL;
1152 }
1153 }
1154 snd_timer_proc_entry = entry;
1155}
1156
1157static void __exit snd_timer_proc_done(void)
1158{
Takashi Iwai746d4a02006-06-23 14:37:59 +02001159 snd_info_free_entry(snd_timer_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +01001160}
Jie Yangcd6a6502015-05-27 19:45:45 +08001161#else /* !CONFIG_SND_PROC_FS */
Takashi Iwaie28563c2005-12-01 10:42:42 +01001162#define snd_timer_proc_init()
1163#define snd_timer_proc_done()
1164#endif
1165
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166/*
1167 * USER SPACE interface
1168 */
1169
Takashi Iwai53d2f742005-11-17 13:56:05 +01001170static void snd_timer_user_interrupt(struct snd_timer_instance *timeri,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 unsigned long resolution,
1172 unsigned long ticks)
1173{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001174 struct snd_timer_user *tu = timeri->callback_data;
1175 struct snd_timer_read *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 int prev;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001177
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 spin_lock(&tu->qlock);
1179 if (tu->qused > 0) {
1180 prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1;
1181 r = &tu->queue[prev];
1182 if (r->resolution == resolution) {
1183 r->ticks += ticks;
1184 goto __wake;
1185 }
1186 }
1187 if (tu->qused >= tu->queue_size) {
1188 tu->overrun++;
1189 } else {
1190 r = &tu->queue[tu->qtail++];
1191 tu->qtail %= tu->queue_size;
1192 r->resolution = resolution;
1193 r->ticks = ticks;
1194 tu->qused++;
1195 }
1196 __wake:
1197 spin_unlock(&tu->qlock);
1198 kill_fasync(&tu->fasync, SIGIO, POLL_IN);
1199 wake_up(&tu->qchange_sleep);
1200}
1201
Takashi Iwai53d2f742005-11-17 13:56:05 +01001202static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu,
1203 struct snd_timer_tread *tread)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204{
1205 if (tu->qused >= tu->queue_size) {
1206 tu->overrun++;
1207 } else {
1208 memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread));
1209 tu->qtail %= tu->queue_size;
1210 tu->qused++;
1211 }
1212}
1213
Takashi Iwai53d2f742005-11-17 13:56:05 +01001214static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
1215 int event,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 struct timespec *tstamp,
1217 unsigned long resolution)
1218{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001219 struct snd_timer_user *tu = timeri->callback_data;
1220 struct snd_timer_tread r1;
Dan Carpenterbfe70782010-04-28 10:29:14 +02001221 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001223 if (event >= SNDRV_TIMER_EVENT_START &&
1224 event <= SNDRV_TIMER_EVENT_PAUSE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 tu->tstamp = *tstamp;
1226 if ((tu->filter & (1 << event)) == 0 || !tu->tread)
1227 return;
1228 r1.event = event;
1229 r1.tstamp = *tstamp;
1230 r1.val = resolution;
Dan Carpenterbfe70782010-04-28 10:29:14 +02001231 spin_lock_irqsave(&tu->qlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 snd_timer_user_append_to_tqueue(tu, &r1);
Dan Carpenterbfe70782010-04-28 10:29:14 +02001233 spin_unlock_irqrestore(&tu->qlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 kill_fasync(&tu->fasync, SIGIO, POLL_IN);
1235 wake_up(&tu->qchange_sleep);
1236}
1237
Takashi Iwai40ed94442016-01-21 17:43:08 +01001238static void snd_timer_user_disconnect(struct snd_timer_instance *timeri)
1239{
1240 struct snd_timer_user *tu = timeri->callback_data;
1241
1242 tu->disconnected = true;
1243 wake_up(&tu->qchange_sleep);
1244}
1245
Takashi Iwai53d2f742005-11-17 13:56:05 +01001246static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 unsigned long resolution,
1248 unsigned long ticks)
1249{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001250 struct snd_timer_user *tu = timeri->callback_data;
1251 struct snd_timer_tread *r, r1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 struct timespec tstamp;
1253 int prev, append = 0;
1254
Takashi Iwai07799e72005-10-10 11:49:49 +02001255 memset(&tstamp, 0, sizeof(tstamp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 spin_lock(&tu->qlock);
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001257 if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) |
1258 (1 << SNDRV_TIMER_EVENT_TICK))) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 spin_unlock(&tu->qlock);
1260 return;
1261 }
Jaroslav Kyselab751eef2007-12-13 10:19:42 +01001262 if (tu->last_resolution != resolution || ticks > 0) {
1263 if (timer_tstamp_monotonic)
Thomas Gleixner26204e02014-06-11 23:59:14 +00001264 ktime_get_ts(&tstamp);
Jaroslav Kyselab751eef2007-12-13 10:19:42 +01001265 else
1266 getnstimeofday(&tstamp);
1267 }
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001268 if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
1269 tu->last_resolution != resolution) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 r1.event = SNDRV_TIMER_EVENT_RESOLUTION;
1271 r1.tstamp = tstamp;
1272 r1.val = resolution;
1273 snd_timer_user_append_to_tqueue(tu, &r1);
1274 tu->last_resolution = resolution;
1275 append++;
1276 }
1277 if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0)
1278 goto __wake;
1279 if (ticks == 0)
1280 goto __wake;
1281 if (tu->qused > 0) {
1282 prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1;
1283 r = &tu->tqueue[prev];
1284 if (r->event == SNDRV_TIMER_EVENT_TICK) {
1285 r->tstamp = tstamp;
1286 r->val += ticks;
1287 append++;
1288 goto __wake;
1289 }
1290 }
1291 r1.event = SNDRV_TIMER_EVENT_TICK;
1292 r1.tstamp = tstamp;
1293 r1.val = ticks;
1294 snd_timer_user_append_to_tqueue(tu, &r1);
1295 append++;
1296 __wake:
1297 spin_unlock(&tu->qlock);
1298 if (append == 0)
1299 return;
1300 kill_fasync(&tu->fasync, SIGIO, POLL_IN);
1301 wake_up(&tu->qchange_sleep);
1302}
1303
1304static int snd_timer_user_open(struct inode *inode, struct file *file)
1305{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001306 struct snd_timer_user *tu;
Takashi Iwai02f48652010-04-13 11:49:04 +02001307 int err;
1308
1309 err = nonseekable_open(inode, file);
1310 if (err < 0)
1311 return err;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001312
Takashi Iwaica2c0962005-09-09 14:20:23 +02001313 tu = kzalloc(sizeof(*tu), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 if (tu == NULL)
1315 return -ENOMEM;
1316 spin_lock_init(&tu->qlock);
1317 init_waitqueue_head(&tu->qchange_sleep);
Takashi Iwaiaf368022016-01-13 17:48:01 +01001318 mutex_init(&tu->ioctl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 tu->ticks = 1;
1320 tu->queue_size = 128;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001321 tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001322 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 if (tu->queue == NULL) {
1324 kfree(tu);
1325 return -ENOMEM;
1326 }
1327 file->private_data = tu;
1328 return 0;
1329}
1330
1331static int snd_timer_user_release(struct inode *inode, struct file *file)
1332{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001333 struct snd_timer_user *tu;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
1335 if (file->private_data) {
1336 tu = file->private_data;
1337 file->private_data = NULL;
Takashi Iwaiaf368022016-01-13 17:48:01 +01001338 mutex_lock(&tu->ioctl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 if (tu->timeri)
1340 snd_timer_close(tu->timeri);
Takashi Iwaiaf368022016-01-13 17:48:01 +01001341 mutex_unlock(&tu->ioctl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 kfree(tu->queue);
1343 kfree(tu->tqueue);
1344 kfree(tu);
1345 }
1346 return 0;
1347}
1348
Takashi Iwai53d2f742005-11-17 13:56:05 +01001349static void snd_timer_user_zero_id(struct snd_timer_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350{
1351 id->dev_class = SNDRV_TIMER_CLASS_NONE;
1352 id->dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1353 id->card = -1;
1354 id->device = -1;
1355 id->subdevice = -1;
1356}
1357
Takashi Iwai53d2f742005-11-17 13:56:05 +01001358static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359{
1360 id->dev_class = timer->tmr_class;
1361 id->dev_sclass = SNDRV_TIMER_SCLASS_NONE;
1362 id->card = timer->card ? timer->card->number : -1;
1363 id->device = timer->tmr_device;
1364 id->subdevice = timer->tmr_subdevice;
1365}
1366
Takashi Iwai53d2f742005-11-17 13:56:05 +01001367static int snd_timer_user_next_device(struct snd_timer_id __user *_tid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001369 struct snd_timer_id id;
1370 struct snd_timer *timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 struct list_head *p;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001372
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 if (copy_from_user(&id, _tid, sizeof(id)))
1374 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001375 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 if (id.dev_class < 0) { /* first item */
1377 if (list_empty(&snd_timer_list))
1378 snd_timer_user_zero_id(&id);
1379 else {
Clemens Ladisch9dfba382005-10-12 17:14:55 +02001380 timer = list_entry(snd_timer_list.next,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001381 struct snd_timer, device_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 snd_timer_user_copy_id(&id, timer);
1383 }
1384 } else {
1385 switch (id.dev_class) {
1386 case SNDRV_TIMER_CLASS_GLOBAL:
1387 id.device = id.device < 0 ? 0 : id.device + 1;
1388 list_for_each(p, &snd_timer_list) {
Takashi Iwai53d2f742005-11-17 13:56:05 +01001389 timer = list_entry(p, struct snd_timer, device_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) {
1391 snd_timer_user_copy_id(&id, timer);
1392 break;
1393 }
1394 if (timer->tmr_device >= id.device) {
1395 snd_timer_user_copy_id(&id, timer);
1396 break;
1397 }
1398 }
1399 if (p == &snd_timer_list)
1400 snd_timer_user_zero_id(&id);
1401 break;
1402 case SNDRV_TIMER_CLASS_CARD:
1403 case SNDRV_TIMER_CLASS_PCM:
1404 if (id.card < 0) {
1405 id.card = 0;
1406 } else {
1407 if (id.card < 0) {
1408 id.card = 0;
1409 } else {
1410 if (id.device < 0) {
1411 id.device = 0;
1412 } else {
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001413 if (id.subdevice < 0) {
1414 id.subdevice = 0;
1415 } else {
1416 id.subdevice++;
1417 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 }
1419 }
1420 }
1421 list_for_each(p, &snd_timer_list) {
Takashi Iwai53d2f742005-11-17 13:56:05 +01001422 timer = list_entry(p, struct snd_timer, device_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 if (timer->tmr_class > id.dev_class) {
1424 snd_timer_user_copy_id(&id, timer);
1425 break;
1426 }
1427 if (timer->tmr_class < id.dev_class)
1428 continue;
1429 if (timer->card->number > id.card) {
1430 snd_timer_user_copy_id(&id, timer);
1431 break;
1432 }
1433 if (timer->card->number < id.card)
1434 continue;
1435 if (timer->tmr_device > id.device) {
1436 snd_timer_user_copy_id(&id, timer);
1437 break;
1438 }
1439 if (timer->tmr_device < id.device)
1440 continue;
1441 if (timer->tmr_subdevice > id.subdevice) {
1442 snd_timer_user_copy_id(&id, timer);
1443 break;
1444 }
1445 if (timer->tmr_subdevice < id.subdevice)
1446 continue;
1447 snd_timer_user_copy_id(&id, timer);
1448 break;
1449 }
1450 if (p == &snd_timer_list)
1451 snd_timer_user_zero_id(&id);
1452 break;
1453 default:
1454 snd_timer_user_zero_id(&id);
1455 }
1456 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001457 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 if (copy_to_user(_tid, &id, sizeof(*_tid)))
1459 return -EFAULT;
1460 return 0;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001461}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001463static int snd_timer_user_ginfo(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001464 struct snd_timer_ginfo __user *_ginfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001466 struct snd_timer_ginfo *ginfo;
1467 struct snd_timer_id tid;
1468 struct snd_timer *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 struct list_head *p;
1470 int err = 0;
1471
Li Zefanef44a1e2009-04-10 09:43:08 +08001472 ginfo = memdup_user(_ginfo, sizeof(*ginfo));
1473 if (IS_ERR(ginfo))
1474 return PTR_ERR(ginfo);
1475
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 tid = ginfo->tid;
1477 memset(ginfo, 0, sizeof(*ginfo));
1478 ginfo->tid = tid;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001479 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 t = snd_timer_find(&tid);
1481 if (t != NULL) {
1482 ginfo->card = t->card ? t->card->number : -1;
1483 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
1484 ginfo->flags |= SNDRV_TIMER_FLG_SLAVE;
1485 strlcpy(ginfo->id, t->id, sizeof(ginfo->id));
1486 strlcpy(ginfo->name, t->name, sizeof(ginfo->name));
1487 ginfo->resolution = t->hw.resolution;
1488 if (t->hw.resolution_min > 0) {
1489 ginfo->resolution_min = t->hw.resolution_min;
1490 ginfo->resolution_max = t->hw.resolution_max;
1491 }
1492 list_for_each(p, &t->open_list_head) {
1493 ginfo->clients++;
1494 }
1495 } else {
1496 err = -ENODEV;
1497 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001498 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo)))
1500 err = -EFAULT;
1501 kfree(ginfo);
1502 return err;
1503}
1504
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001505static int snd_timer_user_gparams(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001506 struct snd_timer_gparams __user *_gparams)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001508 struct snd_timer_gparams gparams;
1509 struct snd_timer *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 int err;
1511
1512 if (copy_from_user(&gparams, _gparams, sizeof(gparams)))
1513 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001514 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 t = snd_timer_find(&gparams.tid);
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001516 if (!t) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 err = -ENODEV;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001518 goto _error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519 }
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001520 if (!list_empty(&t->open_list_head)) {
1521 err = -EBUSY;
1522 goto _error;
1523 }
1524 if (!t->hw.set_period) {
1525 err = -ENOSYS;
1526 goto _error;
1527 }
1528 err = t->hw.set_period(t, gparams.period_num, gparams.period_den);
1529_error:
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001530 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 return err;
1532}
1533
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001534static int snd_timer_user_gstatus(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001535 struct snd_timer_gstatus __user *_gstatus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001537 struct snd_timer_gstatus gstatus;
1538 struct snd_timer_id tid;
1539 struct snd_timer *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 int err = 0;
1541
1542 if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus)))
1543 return -EFAULT;
1544 tid = gstatus.tid;
1545 memset(&gstatus, 0, sizeof(gstatus));
1546 gstatus.tid = tid;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001547 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 t = snd_timer_find(&tid);
1549 if (t != NULL) {
1550 if (t->hw.c_resolution)
1551 gstatus.resolution = t->hw.c_resolution(t);
1552 else
1553 gstatus.resolution = t->hw.resolution;
1554 if (t->hw.precise_resolution) {
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001555 t->hw.precise_resolution(t, &gstatus.resolution_num,
1556 &gstatus.resolution_den);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 } else {
1558 gstatus.resolution_num = gstatus.resolution;
1559 gstatus.resolution_den = 1000000000uL;
1560 }
1561 } else {
1562 err = -ENODEV;
1563 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001564 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus)))
1566 err = -EFAULT;
1567 return err;
1568}
1569
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001570static int snd_timer_user_tselect(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001571 struct snd_timer_select __user *_tselect)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001573 struct snd_timer_user *tu;
1574 struct snd_timer_select tselect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 char str[32];
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001576 int err = 0;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001577
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 tu = file->private_data;
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001579 if (tu->timeri) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 snd_timer_close(tu->timeri);
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001581 tu->timeri = NULL;
1582 }
1583 if (copy_from_user(&tselect, _tselect, sizeof(tselect))) {
1584 err = -EFAULT;
1585 goto __err;
1586 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 sprintf(str, "application %i", current->pid);
1588 if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE)
1589 tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001590 err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid);
1591 if (err < 0)
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001592 goto __err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593
Jesper Juhl4d572772005-05-30 17:30:32 +02001594 kfree(tu->queue);
1595 tu->queue = NULL;
1596 kfree(tu->tqueue);
1597 tu->tqueue = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 if (tu->tread) {
Takashi Iwai53d2f742005-11-17 13:56:05 +01001599 tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread),
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001600 GFP_KERNEL);
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001601 if (tu->tqueue == NULL)
1602 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 } else {
Takashi Iwai53d2f742005-11-17 13:56:05 +01001604 tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001605 GFP_KERNEL);
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001606 if (tu->queue == NULL)
1607 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 }
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001609
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001610 if (err < 0) {
1611 snd_timer_close(tu->timeri);
1612 tu->timeri = NULL;
1613 } else {
1614 tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001615 tu->timeri->callback = tu->tread
1616 ? snd_timer_user_tinterrupt : snd_timer_user_interrupt;
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001617 tu->timeri->ccallback = snd_timer_user_ccallback;
1618 tu->timeri->callback_data = (void *)tu;
Takashi Iwai40ed94442016-01-21 17:43:08 +01001619 tu->timeri->disconnect = snd_timer_user_disconnect;
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001620 }
1621
1622 __err:
Jaroslav Kyselac1935b42005-04-04 16:44:58 +02001623 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624}
1625
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001626static int snd_timer_user_info(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001627 struct snd_timer_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001629 struct snd_timer_user *tu;
1630 struct snd_timer_info *info;
1631 struct snd_timer *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 int err = 0;
1633
1634 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001635 if (!tu->timeri)
1636 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 t = tu->timeri->timer;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001638 if (!t)
1639 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640
Takashi Iwaica2c0962005-09-09 14:20:23 +02001641 info = kzalloc(sizeof(*info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 if (! info)
1643 return -ENOMEM;
1644 info->card = t->card ? t->card->number : -1;
1645 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
1646 info->flags |= SNDRV_TIMER_FLG_SLAVE;
1647 strlcpy(info->id, t->id, sizeof(info->id));
1648 strlcpy(info->name, t->name, sizeof(info->name));
1649 info->resolution = t->hw.resolution;
1650 if (copy_to_user(_info, info, sizeof(*_info)))
1651 err = -EFAULT;
1652 kfree(info);
1653 return err;
1654}
1655
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001656static int snd_timer_user_params(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001657 struct snd_timer_params __user *_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001659 struct snd_timer_user *tu;
1660 struct snd_timer_params params;
1661 struct snd_timer *t;
1662 struct snd_timer_read *tr;
1663 struct snd_timer_tread *ttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 int err;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001665
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001667 if (!tu->timeri)
1668 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 t = tu->timeri->timer;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001670 if (!t)
1671 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 if (copy_from_user(&params, _params, sizeof(params)))
1673 return -EFAULT;
1674 if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) {
1675 err = -EINVAL;
1676 goto _end;
1677 }
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001678 if (params.queue_size > 0 &&
1679 (params.queue_size < 32 || params.queue_size > 1024)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 err = -EINVAL;
1681 goto _end;
1682 }
1683 if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)|
1684 (1<<SNDRV_TIMER_EVENT_TICK)|
1685 (1<<SNDRV_TIMER_EVENT_START)|
1686 (1<<SNDRV_TIMER_EVENT_STOP)|
1687 (1<<SNDRV_TIMER_EVENT_CONTINUE)|
1688 (1<<SNDRV_TIMER_EVENT_PAUSE)|
Jaroslav Kyselaa501dfa2005-08-16 11:09:05 +02001689 (1<<SNDRV_TIMER_EVENT_SUSPEND)|
1690 (1<<SNDRV_TIMER_EVENT_RESUME)|
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 (1<<SNDRV_TIMER_EVENT_MSTART)|
1692 (1<<SNDRV_TIMER_EVENT_MSTOP)|
1693 (1<<SNDRV_TIMER_EVENT_MCONTINUE)|
Jaroslav Kysela65d11d92005-08-16 13:05:43 +02001694 (1<<SNDRV_TIMER_EVENT_MPAUSE)|
1695 (1<<SNDRV_TIMER_EVENT_MSUSPEND)|
Jaroslav Kyselaa501dfa2005-08-16 11:09:05 +02001696 (1<<SNDRV_TIMER_EVENT_MRESUME))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 err = -EINVAL;
1698 goto _end;
1699 }
1700 snd_timer_stop(tu->timeri);
1701 spin_lock_irq(&t->lock);
1702 tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO|
1703 SNDRV_TIMER_IFLG_EXCLUSIVE|
1704 SNDRV_TIMER_IFLG_EARLY_EVENT);
1705 if (params.flags & SNDRV_TIMER_PSFLG_AUTO)
1706 tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO;
1707 if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE)
1708 tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE;
1709 if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT)
1710 tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT;
1711 spin_unlock_irq(&t->lock);
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001712 if (params.queue_size > 0 &&
1713 (unsigned int)tu->queue_size != params.queue_size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 if (tu->tread) {
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001715 ttr = kmalloc(params.queue_size * sizeof(*ttr),
1716 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 if (ttr) {
1718 kfree(tu->tqueue);
1719 tu->queue_size = params.queue_size;
1720 tu->tqueue = ttr;
1721 }
1722 } else {
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001723 tr = kmalloc(params.queue_size * sizeof(*tr),
1724 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 if (tr) {
1726 kfree(tu->queue);
1727 tu->queue_size = params.queue_size;
1728 tu->queue = tr;
1729 }
1730 }
1731 }
1732 tu->qhead = tu->qtail = tu->qused = 0;
1733 if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) {
1734 if (tu->tread) {
Takashi Iwai53d2f742005-11-17 13:56:05 +01001735 struct snd_timer_tread tread;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 tread.event = SNDRV_TIMER_EVENT_EARLY;
1737 tread.tstamp.tv_sec = 0;
1738 tread.tstamp.tv_nsec = 0;
1739 tread.val = 0;
1740 snd_timer_user_append_to_tqueue(tu, &tread);
1741 } else {
Takashi Iwai53d2f742005-11-17 13:56:05 +01001742 struct snd_timer_read *r = &tu->queue[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 r->resolution = 0;
1744 r->ticks = 0;
1745 tu->qused++;
1746 tu->qtail++;
1747 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 }
1749 tu->filter = params.filter;
1750 tu->ticks = params.ticks;
1751 err = 0;
1752 _end:
1753 if (copy_to_user(_params, &params, sizeof(params)))
1754 return -EFAULT;
1755 return err;
1756}
1757
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001758static int snd_timer_user_status(struct file *file,
Takashi Iwai53d2f742005-11-17 13:56:05 +01001759 struct snd_timer_status __user *_status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001761 struct snd_timer_user *tu;
1762 struct snd_timer_status status;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001763
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001765 if (!tu->timeri)
1766 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 memset(&status, 0, sizeof(status));
1768 status.tstamp = tu->tstamp;
1769 status.resolution = snd_timer_resolution(tu->timeri);
1770 status.lost = tu->timeri->lost;
1771 status.overrun = tu->overrun;
1772 spin_lock_irq(&tu->qlock);
1773 status.queue = tu->qused;
1774 spin_unlock_irq(&tu->qlock);
1775 if (copy_to_user(_status, &status, sizeof(status)))
1776 return -EFAULT;
1777 return 0;
1778}
1779
1780static int snd_timer_user_start(struct file *file)
1781{
1782 int err;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001783 struct snd_timer_user *tu;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001784
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001786 if (!tu->timeri)
1787 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788 snd_timer_stop(tu->timeri);
1789 tu->timeri->lost = 0;
1790 tu->last_resolution = 0;
1791 return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0;
1792}
1793
1794static int snd_timer_user_stop(struct file *file)
1795{
1796 int err;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001797 struct snd_timer_user *tu;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001798
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001800 if (!tu->timeri)
1801 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802 return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0;
1803}
1804
1805static int snd_timer_user_continue(struct file *file)
1806{
1807 int err;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001808 struct snd_timer_user *tu;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001809
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001811 if (!tu->timeri)
1812 return -EBADFD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 tu->timeri->lost = 0;
1814 return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0;
1815}
1816
Takashi Iwai15790a62005-05-15 15:04:14 +02001817static int snd_timer_user_pause(struct file *file)
1818{
1819 int err;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001820 struct snd_timer_user *tu;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001821
Takashi Iwai15790a62005-05-15 15:04:14 +02001822 tu = file->private_data;
Clemens Ladisch7c64ec32007-07-16 11:01:30 +02001823 if (!tu->timeri)
1824 return -EBADFD;
Jaroslav Kyselad138b442005-05-16 13:51:39 +02001825 return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0;
Takashi Iwai15790a62005-05-15 15:04:14 +02001826}
1827
Takashi Iwai8c50b372005-05-15 15:43:54 +02001828enum {
1829 SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20),
1830 SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21),
1831 SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22),
1832 SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23),
1833};
1834
Takashi Iwaiaf368022016-01-13 17:48:01 +01001835static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd,
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001836 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001838 struct snd_timer_user *tu;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 void __user *argp = (void __user *)arg;
1840 int __user *p = argp;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001841
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 tu = file->private_data;
1843 switch (cmd) {
1844 case SNDRV_TIMER_IOCTL_PVERSION:
1845 return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0;
1846 case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
1847 return snd_timer_user_next_device(argp);
1848 case SNDRV_TIMER_IOCTL_TREAD:
1849 {
1850 int xarg;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001851
Takashi Iwaiaf368022016-01-13 17:48:01 +01001852 if (tu->timeri) /* too late */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853 return -EBUSY;
Takashi Iwaiaf368022016-01-13 17:48:01 +01001854 if (get_user(xarg, p))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 return -EFAULT;
1856 tu->tread = xarg ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 return 0;
1858 }
1859 case SNDRV_TIMER_IOCTL_GINFO:
1860 return snd_timer_user_ginfo(file, argp);
1861 case SNDRV_TIMER_IOCTL_GPARAMS:
1862 return snd_timer_user_gparams(file, argp);
1863 case SNDRV_TIMER_IOCTL_GSTATUS:
1864 return snd_timer_user_gstatus(file, argp);
1865 case SNDRV_TIMER_IOCTL_SELECT:
1866 return snd_timer_user_tselect(file, argp);
1867 case SNDRV_TIMER_IOCTL_INFO:
1868 return snd_timer_user_info(file, argp);
1869 case SNDRV_TIMER_IOCTL_PARAMS:
1870 return snd_timer_user_params(file, argp);
1871 case SNDRV_TIMER_IOCTL_STATUS:
1872 return snd_timer_user_status(file, argp);
1873 case SNDRV_TIMER_IOCTL_START:
Takashi Iwai8c50b372005-05-15 15:43:54 +02001874 case SNDRV_TIMER_IOCTL_START_OLD:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 return snd_timer_user_start(file);
1876 case SNDRV_TIMER_IOCTL_STOP:
Takashi Iwai8c50b372005-05-15 15:43:54 +02001877 case SNDRV_TIMER_IOCTL_STOP_OLD:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 return snd_timer_user_stop(file);
1879 case SNDRV_TIMER_IOCTL_CONTINUE:
Takashi Iwai8c50b372005-05-15 15:43:54 +02001880 case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 return snd_timer_user_continue(file);
Takashi Iwai15790a62005-05-15 15:04:14 +02001882 case SNDRV_TIMER_IOCTL_PAUSE:
Takashi Iwai8c50b372005-05-15 15:43:54 +02001883 case SNDRV_TIMER_IOCTL_PAUSE_OLD:
Takashi Iwai15790a62005-05-15 15:04:14 +02001884 return snd_timer_user_pause(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 }
1886 return -ENOTTY;
1887}
1888
Takashi Iwaiaf368022016-01-13 17:48:01 +01001889static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
1890 unsigned long arg)
1891{
1892 struct snd_timer_user *tu = file->private_data;
1893 long ret;
1894
1895 mutex_lock(&tu->ioctl_lock);
1896 ret = __snd_timer_user_ioctl(file, cmd, arg);
1897 mutex_unlock(&tu->ioctl_lock);
1898 return ret;
1899}
1900
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901static int snd_timer_user_fasync(int fd, struct file * file, int on)
1902{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001903 struct snd_timer_user *tu;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001904
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 tu = file->private_data;
Jonathan Corbet60aa4922009-02-01 14:52:56 -07001906 return fasync_helper(fd, file, on, &tu->fasync);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907}
1908
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001909static ssize_t snd_timer_user_read(struct file *file, char __user *buffer,
1910 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911{
Takashi Iwai53d2f742005-11-17 13:56:05 +01001912 struct snd_timer_user *tu;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 long result = 0, unit;
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001914 int qhead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915 int err = 0;
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001916
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 tu = file->private_data;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001918 unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919 spin_lock_irq(&tu->qlock);
1920 while ((long)count - result >= unit) {
1921 while (!tu->qused) {
1922 wait_queue_t wait;
1923
1924 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
1925 err = -EAGAIN;
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001926 goto _error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 }
1928
1929 set_current_state(TASK_INTERRUPTIBLE);
1930 init_waitqueue_entry(&wait, current);
1931 add_wait_queue(&tu->qchange_sleep, &wait);
1932
1933 spin_unlock_irq(&tu->qlock);
1934 schedule();
1935 spin_lock_irq(&tu->qlock);
1936
1937 remove_wait_queue(&tu->qchange_sleep, &wait);
1938
Takashi Iwai230323d2016-01-21 17:19:31 +01001939 if (tu->disconnected) {
1940 err = -ENODEV;
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001941 goto _error;
Takashi Iwai230323d2016-01-21 17:19:31 +01001942 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 if (signal_pending(current)) {
1944 err = -ERESTARTSYS;
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001945 goto _error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 }
1947 }
1948
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001949 qhead = tu->qhead++;
1950 tu->qhead %= tu->queue_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 spin_unlock_irq(&tu->qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952
1953 if (tu->tread) {
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001954 if (copy_to_user(buffer, &tu->tqueue[qhead],
1955 sizeof(struct snd_timer_tread)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 } else {
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001958 if (copy_to_user(buffer, &tu->queue[qhead],
1959 sizeof(struct snd_timer_read)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 }
1962
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 spin_lock_irq(&tu->qlock);
1964 tu->qused--;
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001965 if (err < 0)
1966 goto _error;
1967 result += unit;
1968 buffer += unit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 _error:
Takashi Iwai4dff5c72016-02-08 17:26:58 +01001971 spin_unlock_irq(&tu->qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972 return result > 0 ? result : err;
1973}
1974
1975static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait)
1976{
1977 unsigned int mask;
Takashi Iwai53d2f742005-11-17 13:56:05 +01001978 struct snd_timer_user *tu;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979
1980 tu = file->private_data;
1981
1982 poll_wait(file, &tu->qchange_sleep, wait);
Clemens Ladisch6b172a82005-10-12 17:20:21 +02001983
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 mask = 0;
1985 if (tu->qused)
1986 mask |= POLLIN | POLLRDNORM;
Takashi Iwai230323d2016-01-21 17:19:31 +01001987 if (tu->disconnected)
1988 mask |= POLLERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989
1990 return mask;
1991}
1992
1993#ifdef CONFIG_COMPAT
1994#include "timer_compat.c"
1995#else
1996#define snd_timer_user_ioctl_compat NULL
1997#endif
1998
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -08001999static const struct file_operations snd_timer_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000{
2001 .owner = THIS_MODULE,
2002 .read = snd_timer_user_read,
2003 .open = snd_timer_user_open,
2004 .release = snd_timer_user_release,
Takashi Iwai02f48652010-04-13 11:49:04 +02002005 .llseek = no_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 .poll = snd_timer_user_poll,
2007 .unlocked_ioctl = snd_timer_user_ioctl,
2008 .compat_ioctl = snd_timer_user_ioctl_compat,
2009 .fasync = snd_timer_user_fasync,
2010};
2011
Takashi Iwai7c358602015-01-29 18:09:05 +01002012/* unregister the system timer */
2013static void snd_timer_free_all(void)
2014{
2015 struct snd_timer *timer, *n;
2016
2017 list_for_each_entry_safe(timer, n, &snd_timer_list, device_list)
2018 snd_timer_free(timer);
2019}
2020
Takashi Iwai89da0612015-01-29 18:12:26 +01002021static struct device timer_dev;
2022
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023/*
2024 * ENTRY functions
2025 */
2026
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027static int __init alsa_timer_init(void)
2028{
2029 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030
Takashi Iwai89da0612015-01-29 18:12:26 +01002031 snd_device_initialize(&timer_dev, NULL);
2032 dev_set_name(&timer_dev, "timer");
2033
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034#ifdef SNDRV_OSS_INFO_DEV_TIMERS
Clemens Ladisch6b172a82005-10-12 17:20:21 +02002035 snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1,
2036 "system timer");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037#endif
Takashi Iwaie28563c2005-12-01 10:42:42 +01002038
Takashi Iwai7c358602015-01-29 18:09:05 +01002039 err = snd_timer_register_system();
2040 if (err < 0) {
Takashi Iwaicf74dcf2014-02-04 18:22:39 +01002041 pr_err("ALSA: unable to register system timer (%i)\n", err);
Takashi Iwai89da0612015-01-29 18:12:26 +01002042 put_device(&timer_dev);
Takashi Iwai7c358602015-01-29 18:09:05 +01002043 return err;
2044 }
2045
Takashi Iwai40a4b262015-01-30 08:34:58 +01002046 err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0,
2047 &snd_timer_f_ops, NULL, &timer_dev);
Takashi Iwai7c358602015-01-29 18:09:05 +01002048 if (err < 0) {
Takashi Iwaicf74dcf2014-02-04 18:22:39 +01002049 pr_err("ALSA: unable to register timer device (%i)\n", err);
Takashi Iwai7c358602015-01-29 18:09:05 +01002050 snd_timer_free_all();
Takashi Iwai89da0612015-01-29 18:12:26 +01002051 put_device(&timer_dev);
Takashi Iwai7c358602015-01-29 18:09:05 +01002052 return err;
2053 }
2054
Takashi Iwaie28563c2005-12-01 10:42:42 +01002055 snd_timer_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 return 0;
2057}
2058
2059static void __exit alsa_timer_exit(void)
2060{
Takashi Iwai40a4b262015-01-30 08:34:58 +01002061 snd_unregister_device(&timer_dev);
Takashi Iwai7c358602015-01-29 18:09:05 +01002062 snd_timer_free_all();
Takashi Iwai89da0612015-01-29 18:12:26 +01002063 put_device(&timer_dev);
Takashi Iwaie28563c2005-12-01 10:42:42 +01002064 snd_timer_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065#ifdef SNDRV_OSS_INFO_DEV_TIMERS
2066 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1);
2067#endif
2068}
2069
2070module_init(alsa_timer_init)
2071module_exit(alsa_timer_exit)
2072
2073EXPORT_SYMBOL(snd_timer_open);
2074EXPORT_SYMBOL(snd_timer_close);
2075EXPORT_SYMBOL(snd_timer_resolution);
2076EXPORT_SYMBOL(snd_timer_start);
2077EXPORT_SYMBOL(snd_timer_stop);
2078EXPORT_SYMBOL(snd_timer_continue);
2079EXPORT_SYMBOL(snd_timer_pause);
2080EXPORT_SYMBOL(snd_timer_new);
2081EXPORT_SYMBOL(snd_timer_notify);
2082EXPORT_SYMBOL(snd_timer_global_new);
2083EXPORT_SYMBOL(snd_timer_global_free);
2084EXPORT_SYMBOL(snd_timer_global_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085EXPORT_SYMBOL(snd_timer_interrupt);