11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Timers abstract layer 3c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 81da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 91da177e4SLinus Torvalds * (at your option) any later version. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 121da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 131da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 141da177e4SLinus Torvalds * GNU General Public License for more details. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 171da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 181da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds */ 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds #include <linux/delay.h> 231da177e4SLinus Torvalds #include <linux/init.h> 241da177e4SLinus Torvalds #include <linux/slab.h> 251da177e4SLinus Torvalds #include <linux/time.h> 261a60d4c5SIngo Molnar #include <linux/mutex.h> 2751990e82SPaul Gortmaker #include <linux/device.h> 2865a77217SPaul Gortmaker #include <linux/module.h> 29543537bdSPaulo Marques #include <linux/string.h> 301da177e4SLinus Torvalds #include <sound/core.h> 311da177e4SLinus Torvalds #include <sound/timer.h> 321da177e4SLinus Torvalds #include <sound/control.h> 331da177e4SLinus Torvalds #include <sound/info.h> 341da177e4SLinus Torvalds #include <sound/minors.h> 351da177e4SLinus Torvalds #include <sound/initval.h> 361da177e4SLinus Torvalds #include <linux/kmod.h> 371da177e4SLinus Torvalds 389f8a7658STakashi Iwai /* internal flags */ 399f8a7658STakashi Iwai #define SNDRV_TIMER_IFLG_PAUSED 0x00010000 409f8a7658STakashi Iwai 418eeaa2f9STakashi Iwai #if IS_ENABLED(CONFIG_SND_HRTIMER) 42109fef9eSClemens Ladisch #define DEFAULT_TIMER_LIMIT 4 431da177e4SLinus Torvalds #else 441da177e4SLinus Torvalds #define DEFAULT_TIMER_LIMIT 1 451da177e4SLinus Torvalds #endif 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds static int timer_limit = DEFAULT_TIMER_LIMIT; 48b751eef1SJaroslav Kysela static int timer_tstamp_monotonic = 1; 49c1017a4cSJaroslav Kysela MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); 501da177e4SLinus Torvalds MODULE_DESCRIPTION("ALSA timer interface"); 511da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 521da177e4SLinus Torvalds module_param(timer_limit, int, 0444); 531da177e4SLinus Torvalds MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); 54b751eef1SJaroslav Kysela module_param(timer_tstamp_monotonic, int, 0444); 55b751eef1SJaroslav Kysela MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); 561da177e4SLinus Torvalds 5703cfe6f5SKay Sievers MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); 5803cfe6f5SKay Sievers MODULE_ALIAS("devname:snd/timer"); 5903cfe6f5SKay Sievers 6053d2f744STakashi Iwai struct snd_timer_user { 6153d2f744STakashi Iwai struct snd_timer_instance *timeri; 621da177e4SLinus Torvalds int tread; /* enhanced read with timestamps and events */ 631da177e4SLinus Torvalds unsigned long ticks; 641da177e4SLinus Torvalds unsigned long overrun; 651da177e4SLinus Torvalds int qhead; 661da177e4SLinus Torvalds int qtail; 671da177e4SLinus Torvalds int qused; 681da177e4SLinus Torvalds int queue_size; 69230323daSTakashi Iwai bool disconnected; 7053d2f744STakashi Iwai struct snd_timer_read *queue; 7153d2f744STakashi Iwai struct snd_timer_tread *tqueue; 721da177e4SLinus Torvalds spinlock_t qlock; 731da177e4SLinus Torvalds unsigned long last_resolution; 741da177e4SLinus Torvalds unsigned int filter; 751da177e4SLinus Torvalds struct timespec tstamp; /* trigger tstamp */ 761da177e4SLinus Torvalds wait_queue_head_t qchange_sleep; 771da177e4SLinus Torvalds struct fasync_struct *fasync; 78af368027STakashi Iwai struct mutex ioctl_lock; 7953d2f744STakashi Iwai }; 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds /* list of timers */ 821da177e4SLinus Torvalds static LIST_HEAD(snd_timer_list); 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds /* list of slave instances */ 851da177e4SLinus Torvalds static LIST_HEAD(snd_timer_slave_list); 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds /* lock for slave active lists */ 881da177e4SLinus Torvalds static DEFINE_SPINLOCK(slave_active_lock); 891da177e4SLinus Torvalds 901a60d4c5SIngo Molnar static DEFINE_MUTEX(register_mutex); 911da177e4SLinus Torvalds 9253d2f744STakashi Iwai static int snd_timer_free(struct snd_timer *timer); 9353d2f744STakashi Iwai static int snd_timer_dev_free(struct snd_device *device); 9453d2f744STakashi Iwai static int snd_timer_dev_register(struct snd_device *device); 95c461482cSTakashi Iwai static int snd_timer_dev_disconnect(struct snd_device *device); 961da177e4SLinus Torvalds 9753d2f744STakashi Iwai static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds /* 1001da177e4SLinus Torvalds * create a timer instance with the given owner string. 1011da177e4SLinus Torvalds * when timer is not NULL, increments the module counter 1021da177e4SLinus Torvalds */ 10353d2f744STakashi Iwai static struct snd_timer_instance *snd_timer_instance_new(char *owner, 10453d2f744STakashi Iwai struct snd_timer *timer) 1051da177e4SLinus Torvalds { 10653d2f744STakashi Iwai struct snd_timer_instance *timeri; 107ca2c0966STakashi Iwai timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); 1081da177e4SLinus Torvalds if (timeri == NULL) 1091da177e4SLinus Torvalds return NULL; 110543537bdSPaulo Marques timeri->owner = kstrdup(owner, GFP_KERNEL); 1111da177e4SLinus Torvalds if (! timeri->owner) { 1121da177e4SLinus Torvalds kfree(timeri); 1131da177e4SLinus Torvalds return NULL; 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->open_list); 1161da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->active_list); 1171da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->ack_list); 1181da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->slave_list_head); 1191da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->slave_active_head); 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds timeri->timer = timer; 122de24214dSClemens Ladisch if (timer && !try_module_get(timer->module)) { 1231da177e4SLinus Torvalds kfree(timeri->owner); 1241da177e4SLinus Torvalds kfree(timeri); 1251da177e4SLinus Torvalds return NULL; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds return timeri; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds /* 1321da177e4SLinus Torvalds * find a timer instance from the given timer id 1331da177e4SLinus Torvalds */ 13453d2f744STakashi Iwai static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) 1351da177e4SLinus Torvalds { 13653d2f744STakashi Iwai struct snd_timer *timer = NULL; 1371da177e4SLinus Torvalds 1389244b2c3SJohannes Berg list_for_each_entry(timer, &snd_timer_list, device_list) { 1391da177e4SLinus Torvalds if (timer->tmr_class != tid->dev_class) 1401da177e4SLinus Torvalds continue; 1411da177e4SLinus Torvalds if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || 1421da177e4SLinus Torvalds timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && 1431da177e4SLinus Torvalds (timer->card == NULL || 1441da177e4SLinus Torvalds timer->card->number != tid->card)) 1451da177e4SLinus Torvalds continue; 1461da177e4SLinus Torvalds if (timer->tmr_device != tid->device) 1471da177e4SLinus Torvalds continue; 1481da177e4SLinus Torvalds if (timer->tmr_subdevice != tid->subdevice) 1491da177e4SLinus Torvalds continue; 1501da177e4SLinus Torvalds return timer; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds return NULL; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 155ee2da997SJohannes Berg #ifdef CONFIG_MODULES 1561da177e4SLinus Torvalds 15753d2f744STakashi Iwai static void snd_timer_request(struct snd_timer_id *tid) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds switch (tid->dev_class) { 1601da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_GLOBAL: 1611da177e4SLinus Torvalds if (tid->device < timer_limit) 1621da177e4SLinus Torvalds request_module("snd-timer-%i", tid->device); 1631da177e4SLinus Torvalds break; 1641da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_CARD: 1651da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_PCM: 1661da177e4SLinus Torvalds if (tid->card < snd_ecards_limit) 1671da177e4SLinus Torvalds request_module("snd-card-%i", tid->card); 1681da177e4SLinus Torvalds break; 1691da177e4SLinus Torvalds default: 1701da177e4SLinus Torvalds break; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds #endif 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds /* 1771da177e4SLinus Torvalds * look for a master instance matching with the slave id of the given slave. 1781da177e4SLinus Torvalds * when found, relink the open_link of the slave. 1791da177e4SLinus Torvalds * 1801da177e4SLinus Torvalds * call this with register_mutex down. 1811da177e4SLinus Torvalds */ 18253d2f744STakashi Iwai static void snd_timer_check_slave(struct snd_timer_instance *slave) 1831da177e4SLinus Torvalds { 18453d2f744STakashi Iwai struct snd_timer *timer; 18553d2f744STakashi Iwai struct snd_timer_instance *master; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds /* FIXME: it's really dumb to look up all entries.. */ 1889244b2c3SJohannes Berg list_for_each_entry(timer, &snd_timer_list, device_list) { 1899244b2c3SJohannes Berg list_for_each_entry(master, &timer->open_list_head, open_list) { 1901da177e4SLinus Torvalds if (slave->slave_class == master->slave_class && 1911da177e4SLinus Torvalds slave->slave_id == master->slave_id) { 1925b7c757dSNicolas Kaiser list_move_tail(&slave->open_list, 1936b172a85SClemens Ladisch &master->slave_list_head); 1941da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 1951da177e4SLinus Torvalds slave->master = master; 1961da177e4SLinus Torvalds slave->timer = master->timer; 1971da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 1981da177e4SLinus Torvalds return; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds /* 2051da177e4SLinus Torvalds * look for slave instances matching with the slave id of the given master. 2061da177e4SLinus Torvalds * when found, relink the open_link of slaves. 2071da177e4SLinus Torvalds * 2081da177e4SLinus Torvalds * call this with register_mutex down. 2091da177e4SLinus Torvalds */ 21053d2f744STakashi Iwai static void snd_timer_check_master(struct snd_timer_instance *master) 2111da177e4SLinus Torvalds { 2129244b2c3SJohannes Berg struct snd_timer_instance *slave, *tmp; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds /* check all pending slaves */ 2159244b2c3SJohannes Berg list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { 2161da177e4SLinus Torvalds if (slave->slave_class == master->slave_class && 2171da177e4SLinus Torvalds slave->slave_id == master->slave_id) { 2189244b2c3SJohannes Berg list_move_tail(&slave->open_list, &master->slave_list_head); 2191da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 220b5a663aaSTakashi Iwai spin_lock(&master->timer->lock); 2211da177e4SLinus Torvalds slave->master = master; 2221da177e4SLinus Torvalds slave->timer = master->timer; 2231da177e4SLinus Torvalds if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) 2246b172a85SClemens Ladisch list_add_tail(&slave->active_list, 2256b172a85SClemens Ladisch &master->slave_active_head); 226b5a663aaSTakashi Iwai spin_unlock(&master->timer->lock); 2271da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds /* 2331da177e4SLinus Torvalds * open a timer instance 2341da177e4SLinus Torvalds * when opening a master, the slave id must be here given. 2351da177e4SLinus Torvalds */ 23653d2f744STakashi Iwai int snd_timer_open(struct snd_timer_instance **ti, 23753d2f744STakashi Iwai char *owner, struct snd_timer_id *tid, 2381da177e4SLinus Torvalds unsigned int slave_id) 2391da177e4SLinus Torvalds { 24053d2f744STakashi Iwai struct snd_timer *timer; 24153d2f744STakashi Iwai struct snd_timer_instance *timeri = NULL; 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { 2441da177e4SLinus Torvalds /* open a slave instance */ 2451da177e4SLinus Torvalds if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || 2461da177e4SLinus Torvalds tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { 247cf74dcf3STakashi Iwai pr_debug("ALSA: timer: invalid slave class %i\n", 248cf74dcf3STakashi Iwai tid->dev_sclass); 2491da177e4SLinus Torvalds return -EINVAL; 2501da177e4SLinus Torvalds } 2511a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 2521da177e4SLinus Torvalds timeri = snd_timer_instance_new(owner, NULL); 2532fd43d11SClemens Ladisch if (!timeri) { 2541a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2552fd43d11SClemens Ladisch return -ENOMEM; 2562fd43d11SClemens Ladisch } 2571da177e4SLinus Torvalds timeri->slave_class = tid->dev_sclass; 2581da177e4SLinus Torvalds timeri->slave_id = tid->device; 2591da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; 2601da177e4SLinus Torvalds list_add_tail(&timeri->open_list, &snd_timer_slave_list); 2611da177e4SLinus Torvalds snd_timer_check_slave(timeri); 2621a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2631da177e4SLinus Torvalds *ti = timeri; 2641da177e4SLinus Torvalds return 0; 2651da177e4SLinus Torvalds } 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* open a master instance */ 2681a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 2691da177e4SLinus Torvalds timer = snd_timer_find(tid); 270ee2da997SJohannes Berg #ifdef CONFIG_MODULES 271ee2da997SJohannes Berg if (!timer) { 2721a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2731da177e4SLinus Torvalds snd_timer_request(tid); 2741a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 2751da177e4SLinus Torvalds timer = snd_timer_find(tid); 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds #endif 2782fd43d11SClemens Ladisch if (!timer) { 2791a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2802fd43d11SClemens Ladisch return -ENODEV; 2812fd43d11SClemens Ladisch } 2821da177e4SLinus Torvalds if (!list_empty(&timer->open_list_head)) { 2832fd43d11SClemens Ladisch timeri = list_entry(timer->open_list_head.next, 28453d2f744STakashi Iwai struct snd_timer_instance, open_list); 2851da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { 2861a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2871da177e4SLinus Torvalds return -EBUSY; 2881da177e4SLinus Torvalds } 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds timeri = snd_timer_instance_new(owner, timer); 2912fd43d11SClemens Ladisch if (!timeri) { 2921a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2932fd43d11SClemens Ladisch return -ENOMEM; 2942fd43d11SClemens Ladisch } 295230323daSTakashi Iwai /* take a card refcount for safe disconnection */ 296230323daSTakashi Iwai if (timer->card) 297230323daSTakashi Iwai get_device(&timer->card->card_dev); 2981da177e4SLinus Torvalds timeri->slave_class = tid->dev_sclass; 2991da177e4SLinus Torvalds timeri->slave_id = slave_id; 3008ddc0563SVegard Nossum 3018ddc0563SVegard Nossum if (list_empty(&timer->open_list_head) && timer->hw.open) { 3028ddc0563SVegard Nossum int err = timer->hw.open(timer); 3038ddc0563SVegard Nossum if (err) { 3048ddc0563SVegard Nossum kfree(timeri->owner); 3058ddc0563SVegard Nossum kfree(timeri); 3068ddc0563SVegard Nossum 3078ddc0563SVegard Nossum if (timer->card) 3088ddc0563SVegard Nossum put_device(&timer->card->card_dev); 3098ddc0563SVegard Nossum module_put(timer->module); 3108ddc0563SVegard Nossum mutex_unlock(®ister_mutex); 3118ddc0563SVegard Nossum return err; 3128ddc0563SVegard Nossum } 3138ddc0563SVegard Nossum } 3148ddc0563SVegard Nossum 3151da177e4SLinus Torvalds list_add_tail(&timeri->open_list, &timer->open_list_head); 3161da177e4SLinus Torvalds snd_timer_check_master(timeri); 3171a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 3181da177e4SLinus Torvalds *ti = timeri; 3191da177e4SLinus Torvalds return 0; 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds /* 3231da177e4SLinus Torvalds * close a timer instance 3241da177e4SLinus Torvalds */ 32553d2f744STakashi Iwai int snd_timer_close(struct snd_timer_instance *timeri) 3261da177e4SLinus Torvalds { 32753d2f744STakashi Iwai struct snd_timer *timer = NULL; 3289244b2c3SJohannes Berg struct snd_timer_instance *slave, *tmp; 3291da177e4SLinus Torvalds 3300072889aSTakashi Iwai if (snd_BUG_ON(!timeri)) 3317eaa943cSTakashi Iwai return -ENXIO; 3321da177e4SLinus Torvalds 3339984d1b5STakashi Iwai mutex_lock(®ister_mutex); 3349984d1b5STakashi Iwai list_del(&timeri->open_list); 3359984d1b5STakashi Iwai 3361da177e4SLinus Torvalds /* force to stop the timer */ 3371da177e4SLinus Torvalds snd_timer_stop(timeri); 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds timer = timeri->timer; 3409984d1b5STakashi Iwai if (timer) { 3411da177e4SLinus Torvalds /* wait, until the active callback is finished */ 3421da177e4SLinus Torvalds spin_lock_irq(&timer->lock); 3431da177e4SLinus Torvalds while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { 3441da177e4SLinus Torvalds spin_unlock_irq(&timer->lock); 3451da177e4SLinus Torvalds udelay(10); 3461da177e4SLinus Torvalds spin_lock_irq(&timer->lock); 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds spin_unlock_irq(&timer->lock); 3499984d1b5STakashi Iwai 3501da177e4SLinus Torvalds /* remove slave links */ 351b5a663aaSTakashi Iwai spin_lock_irq(&slave_active_lock); 352b5a663aaSTakashi Iwai spin_lock(&timer->lock); 3539244b2c3SJohannes Berg list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, 3549244b2c3SJohannes Berg open_list) { 3559244b2c3SJohannes Berg list_move_tail(&slave->open_list, &snd_timer_slave_list); 3561da177e4SLinus Torvalds slave->master = NULL; 3571da177e4SLinus Torvalds slave->timer = NULL; 358b5a663aaSTakashi Iwai list_del_init(&slave->ack_list); 359b5a663aaSTakashi Iwai list_del_init(&slave->active_list); 3601da177e4SLinus Torvalds } 361b5a663aaSTakashi Iwai spin_unlock(&timer->lock); 362b5a663aaSTakashi Iwai spin_unlock_irq(&slave_active_lock); 3639984d1b5STakashi Iwai 3649984d1b5STakashi Iwai /* slave doesn't need to release timer resources below */ 3659984d1b5STakashi Iwai if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) 3669984d1b5STakashi Iwai timer = NULL; 3671da177e4SLinus Torvalds } 3689984d1b5STakashi Iwai 3691da177e4SLinus Torvalds if (timeri->private_free) 3701da177e4SLinus Torvalds timeri->private_free(timeri); 3711da177e4SLinus Torvalds kfree(timeri->owner); 3721da177e4SLinus Torvalds kfree(timeri); 3739984d1b5STakashi Iwai 3749984d1b5STakashi Iwai if (timer) { 3759984d1b5STakashi Iwai if (list_empty(&timer->open_list_head) && timer->hw.close) 3769984d1b5STakashi Iwai timer->hw.close(timer); 3779984d1b5STakashi Iwai /* release a card refcount for safe disconnection */ 3789984d1b5STakashi Iwai if (timer->card) 3799984d1b5STakashi Iwai put_device(&timer->card->card_dev); 380de24214dSClemens Ladisch module_put(timer->module); 3819984d1b5STakashi Iwai } 3829984d1b5STakashi Iwai 3839984d1b5STakashi Iwai mutex_unlock(®ister_mutex); 3841da177e4SLinus Torvalds return 0; 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 38753d2f744STakashi Iwai unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) 3881da177e4SLinus Torvalds { 38953d2f744STakashi Iwai struct snd_timer * timer; 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds if (timeri == NULL) 3921da177e4SLinus Torvalds return 0; 3931da177e4SLinus Torvalds if ((timer = timeri->timer) != NULL) { 3941da177e4SLinus Torvalds if (timer->hw.c_resolution) 3951da177e4SLinus Torvalds return timer->hw.c_resolution(timer); 3961da177e4SLinus Torvalds return timer->hw.resolution; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds return 0; 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds 40153d2f744STakashi Iwai static void snd_timer_notify1(struct snd_timer_instance *ti, int event) 4021da177e4SLinus Torvalds { 40353d2f744STakashi Iwai struct snd_timer *timer; 4041da177e4SLinus Torvalds unsigned long resolution = 0; 40553d2f744STakashi Iwai struct snd_timer_instance *ts; 4061da177e4SLinus Torvalds struct timespec tstamp; 4071da177e4SLinus Torvalds 408b751eef1SJaroslav Kysela if (timer_tstamp_monotonic) 40926204e04SThomas Gleixner ktime_get_ts(&tstamp); 410b751eef1SJaroslav Kysela else 41107799e75STakashi Iwai getnstimeofday(&tstamp); 4127eaa943cSTakashi Iwai if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || 4137eaa943cSTakashi Iwai event > SNDRV_TIMER_EVENT_PAUSE)) 4147eaa943cSTakashi Iwai return; 4156b172a85SClemens Ladisch if (event == SNDRV_TIMER_EVENT_START || 4166b172a85SClemens Ladisch event == SNDRV_TIMER_EVENT_CONTINUE) 4171da177e4SLinus Torvalds resolution = snd_timer_resolution(ti); 4181da177e4SLinus Torvalds if (ti->ccallback) 419b30477d5SJaroslav Kysela ti->ccallback(ti, event, &tstamp, resolution); 4201da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) 4211da177e4SLinus Torvalds return; 4221da177e4SLinus Torvalds timer = ti->timer; 4231da177e4SLinus Torvalds if (timer == NULL) 4241da177e4SLinus Torvalds return; 4251da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) 4261da177e4SLinus Torvalds return; 4279244b2c3SJohannes Berg list_for_each_entry(ts, &ti->slave_active_head, active_list) 4281da177e4SLinus Torvalds if (ts->ccallback) 429117159f0STakashi Iwai ts->ccallback(ts, event + 100, &tstamp, resolution); 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds 432f65e0d29STakashi Iwai /* start/continue a master timer */ 433f65e0d29STakashi Iwai static int snd_timer_start1(struct snd_timer_instance *timeri, 434f65e0d29STakashi Iwai bool start, unsigned long ticks) 4351da177e4SLinus Torvalds { 436f65e0d29STakashi Iwai struct snd_timer *timer; 437f65e0d29STakashi Iwai int result; 438f65e0d29STakashi Iwai unsigned long flags; 439f65e0d29STakashi Iwai 440f65e0d29STakashi Iwai timer = timeri->timer; 441f65e0d29STakashi Iwai if (!timer) 442f65e0d29STakashi Iwai return -EINVAL; 443f65e0d29STakashi Iwai 444f65e0d29STakashi Iwai spin_lock_irqsave(&timer->lock, flags); 445f65e0d29STakashi Iwai if (timer->card && timer->card->shutdown) { 446f65e0d29STakashi Iwai result = -ENODEV; 447f65e0d29STakashi Iwai goto unlock; 448f65e0d29STakashi Iwai } 449f65e0d29STakashi Iwai if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | 450f65e0d29STakashi Iwai SNDRV_TIMER_IFLG_START)) { 451f65e0d29STakashi Iwai result = -EBUSY; 452f65e0d29STakashi Iwai goto unlock; 453f65e0d29STakashi Iwai } 454f65e0d29STakashi Iwai 455f65e0d29STakashi Iwai if (start) 456f65e0d29STakashi Iwai timeri->ticks = timeri->cticks = ticks; 457f65e0d29STakashi Iwai else if (!timeri->cticks) 458f65e0d29STakashi Iwai timeri->cticks = 1; 459f65e0d29STakashi Iwai timeri->pticks = 0; 460f65e0d29STakashi Iwai 4615b7c757dSNicolas Kaiser list_move_tail(&timeri->active_list, &timer->active_list_head); 4621da177e4SLinus Torvalds if (timer->running) { 4631da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) 4641da177e4SLinus Torvalds goto __start_now; 4651da177e4SLinus Torvalds timer->flags |= SNDRV_TIMER_FLG_RESCHED; 4661da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_START; 467f65e0d29STakashi Iwai result = 1; /* delayed start */ 4681da177e4SLinus Torvalds } else { 469f65e0d29STakashi Iwai if (start) 470f65e0d29STakashi Iwai timer->sticks = ticks; 4711da177e4SLinus Torvalds timer->hw.start(timer); 4721da177e4SLinus Torvalds __start_now: 4731da177e4SLinus Torvalds timer->running++; 4741da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; 475f65e0d29STakashi Iwai result = 0; 4761da177e4SLinus Torvalds } 477f65e0d29STakashi Iwai snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : 478f65e0d29STakashi Iwai SNDRV_TIMER_EVENT_CONTINUE); 479f65e0d29STakashi Iwai unlock: 480f65e0d29STakashi Iwai spin_unlock_irqrestore(&timer->lock, flags); 481f65e0d29STakashi Iwai return result; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 484f65e0d29STakashi Iwai /* start/continue a slave timer */ 485f65e0d29STakashi Iwai static int snd_timer_start_slave(struct snd_timer_instance *timeri, 486f65e0d29STakashi Iwai bool start) 4871da177e4SLinus Torvalds { 4881da177e4SLinus Torvalds unsigned long flags; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds spin_lock_irqsave(&slave_active_lock, flags); 491f784beb7STakashi Iwai if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { 492f784beb7STakashi Iwai spin_unlock_irqrestore(&slave_active_lock, flags); 493f784beb7STakashi Iwai return -EBUSY; 494f784beb7STakashi Iwai } 4951da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; 496b5a663aaSTakashi Iwai if (timeri->master && timeri->timer) { 497b5a663aaSTakashi Iwai spin_lock(&timeri->timer->lock); 4986b172a85SClemens Ladisch list_add_tail(&timeri->active_list, 4996b172a85SClemens Ladisch &timeri->master->slave_active_head); 500f65e0d29STakashi Iwai snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : 501f65e0d29STakashi Iwai SNDRV_TIMER_EVENT_CONTINUE); 502b5a663aaSTakashi Iwai spin_unlock(&timeri->timer->lock); 503b5a663aaSTakashi Iwai } 5041da177e4SLinus Torvalds spin_unlock_irqrestore(&slave_active_lock, flags); 5051da177e4SLinus Torvalds return 1; /* delayed start */ 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 508f65e0d29STakashi Iwai /* stop/pause a master timer */ 509f65e0d29STakashi Iwai static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) 5101da177e4SLinus Torvalds { 51153d2f744STakashi Iwai struct snd_timer *timer; 512f65e0d29STakashi Iwai int result = 0; 5131da177e4SLinus Torvalds unsigned long flags; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds timer = timeri->timer; 5161da177e4SLinus Torvalds if (!timer) 5171da177e4SLinus Torvalds return -EINVAL; 5181da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 519f784beb7STakashi Iwai if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | 520f784beb7STakashi Iwai SNDRV_TIMER_IFLG_START))) { 521f65e0d29STakashi Iwai result = -EBUSY; 522f65e0d29STakashi Iwai goto unlock; 523f784beb7STakashi Iwai } 5241da177e4SLinus Torvalds list_del_init(&timeri->ack_list); 5251da177e4SLinus Torvalds list_del_init(&timeri->active_list); 526f65e0d29STakashi Iwai if (timer->card && timer->card->shutdown) 527f65e0d29STakashi Iwai goto unlock; 528f65e0d29STakashi Iwai if (stop) { 529f65e0d29STakashi Iwai timeri->cticks = timeri->ticks; 530f65e0d29STakashi Iwai timeri->pticks = 0; 531230323daSTakashi Iwai } 5321da177e4SLinus Torvalds if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && 5331da177e4SLinus Torvalds !(--timer->running)) { 5341da177e4SLinus Torvalds timer->hw.stop(timer); 5351da177e4SLinus Torvalds if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { 5361da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; 5371da177e4SLinus Torvalds snd_timer_reschedule(timer, 0); 5381da177e4SLinus Torvalds if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { 5391da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; 5401da177e4SLinus Torvalds timer->hw.start(timer); 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds } 544c3b16813STakashi Iwai timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); 5459f8a7658STakashi Iwai if (stop) 5469f8a7658STakashi Iwai timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; 5479f8a7658STakashi Iwai else 5489f8a7658STakashi Iwai timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; 549f65e0d29STakashi Iwai snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : 550f65e0d29STakashi Iwai SNDRV_TIMER_EVENT_CONTINUE); 551f65e0d29STakashi Iwai unlock: 5521da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 553f65e0d29STakashi Iwai return result; 554f65e0d29STakashi Iwai } 555f65e0d29STakashi Iwai 556f65e0d29STakashi Iwai /* stop/pause a slave timer */ 557f65e0d29STakashi Iwai static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) 558f65e0d29STakashi Iwai { 559f65e0d29STakashi Iwai unsigned long flags; 560f65e0d29STakashi Iwai 561f65e0d29STakashi Iwai spin_lock_irqsave(&slave_active_lock, flags); 562f65e0d29STakashi Iwai if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { 563f65e0d29STakashi Iwai spin_unlock_irqrestore(&slave_active_lock, flags); 564f65e0d29STakashi Iwai return -EBUSY; 565f65e0d29STakashi Iwai } 566f65e0d29STakashi Iwai timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; 567f65e0d29STakashi Iwai if (timeri->timer) { 568f65e0d29STakashi Iwai spin_lock(&timeri->timer->lock); 569f65e0d29STakashi Iwai list_del_init(&timeri->ack_list); 570f65e0d29STakashi Iwai list_del_init(&timeri->active_list); 571f65e0d29STakashi Iwai snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : 572f65e0d29STakashi Iwai SNDRV_TIMER_EVENT_CONTINUE); 573f65e0d29STakashi Iwai spin_unlock(&timeri->timer->lock); 574f65e0d29STakashi Iwai } 575f65e0d29STakashi Iwai spin_unlock_irqrestore(&slave_active_lock, flags); 5761da177e4SLinus Torvalds return 0; 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds /* 580f65e0d29STakashi Iwai * start the timer instance 581f65e0d29STakashi Iwai */ 582f65e0d29STakashi Iwai int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) 583f65e0d29STakashi Iwai { 584f65e0d29STakashi Iwai if (timeri == NULL || ticks < 1) 585f65e0d29STakashi Iwai return -EINVAL; 586f65e0d29STakashi Iwai if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) 587f65e0d29STakashi Iwai return snd_timer_start_slave(timeri, true); 588f65e0d29STakashi Iwai else 589f65e0d29STakashi Iwai return snd_timer_start1(timeri, true, ticks); 590f65e0d29STakashi Iwai } 591f65e0d29STakashi Iwai 592f65e0d29STakashi Iwai /* 5931da177e4SLinus Torvalds * stop the timer instance. 5941da177e4SLinus Torvalds * 5951da177e4SLinus Torvalds * do not call this from the timer callback! 5961da177e4SLinus Torvalds */ 59753d2f744STakashi Iwai int snd_timer_stop(struct snd_timer_instance *timeri) 5981da177e4SLinus Torvalds { 599f65e0d29STakashi Iwai if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) 600f65e0d29STakashi Iwai return snd_timer_stop_slave(timeri, true); 601f65e0d29STakashi Iwai else 602f65e0d29STakashi Iwai return snd_timer_stop1(timeri, true); 6031da177e4SLinus Torvalds } 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds /* 6061da177e4SLinus Torvalds * start again.. the tick is kept. 6071da177e4SLinus Torvalds */ 60853d2f744STakashi Iwai int snd_timer_continue(struct snd_timer_instance *timeri) 6091da177e4SLinus Torvalds { 6109f8a7658STakashi Iwai /* timer can continue only after pause */ 6119f8a7658STakashi Iwai if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) 6129f8a7658STakashi Iwai return -EINVAL; 6139f8a7658STakashi Iwai 6141da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) 615f65e0d29STakashi Iwai return snd_timer_start_slave(timeri, false); 616f65e0d29STakashi Iwai else 617f65e0d29STakashi Iwai return snd_timer_start1(timeri, false, 0); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds /* 6211da177e4SLinus Torvalds * pause.. remember the ticks left 6221da177e4SLinus Torvalds */ 62353d2f744STakashi Iwai int snd_timer_pause(struct snd_timer_instance * timeri) 6241da177e4SLinus Torvalds { 625f65e0d29STakashi Iwai if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) 626f65e0d29STakashi Iwai return snd_timer_stop_slave(timeri, false); 627f65e0d29STakashi Iwai else 628f65e0d29STakashi Iwai return snd_timer_stop1(timeri, false); 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds /* 6321da177e4SLinus Torvalds * reschedule the timer 6331da177e4SLinus Torvalds * 6341da177e4SLinus Torvalds * start pending instances and check the scheduling ticks. 6351da177e4SLinus Torvalds * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. 6361da177e4SLinus Torvalds */ 63753d2f744STakashi Iwai static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) 6381da177e4SLinus Torvalds { 63953d2f744STakashi Iwai struct snd_timer_instance *ti; 6401da177e4SLinus Torvalds unsigned long ticks = ~0UL; 6411da177e4SLinus Torvalds 6429244b2c3SJohannes Berg list_for_each_entry(ti, &timer->active_list_head, active_list) { 6431da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_START) { 6441da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_START; 6451da177e4SLinus Torvalds ti->flags |= SNDRV_TIMER_IFLG_RUNNING; 6461da177e4SLinus Torvalds timer->running++; 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { 6491da177e4SLinus Torvalds if (ticks > ti->cticks) 6501da177e4SLinus Torvalds ticks = ti->cticks; 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds if (ticks == ~0UL) { 6541da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; 6551da177e4SLinus Torvalds return; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds if (ticks > timer->hw.ticks) 6581da177e4SLinus Torvalds ticks = timer->hw.ticks; 6591da177e4SLinus Torvalds if (ticks_left != ticks) 6601da177e4SLinus Torvalds timer->flags |= SNDRV_TIMER_FLG_CHANGE; 6611da177e4SLinus Torvalds timer->sticks = ticks; 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds /* 6651da177e4SLinus Torvalds * timer tasklet 6661da177e4SLinus Torvalds * 6671da177e4SLinus Torvalds */ 6681da177e4SLinus Torvalds static void snd_timer_tasklet(unsigned long arg) 6691da177e4SLinus Torvalds { 67053d2f744STakashi Iwai struct snd_timer *timer = (struct snd_timer *) arg; 67153d2f744STakashi Iwai struct snd_timer_instance *ti; 6721da177e4SLinus Torvalds struct list_head *p; 6731da177e4SLinus Torvalds unsigned long resolution, ticks; 6742999ff5bSTakashi Iwai unsigned long flags; 6751da177e4SLinus Torvalds 676230323daSTakashi Iwai if (timer->card && timer->card->shutdown) 677230323daSTakashi Iwai return; 678230323daSTakashi Iwai 6792999ff5bSTakashi Iwai spin_lock_irqsave(&timer->lock, flags); 6801da177e4SLinus Torvalds /* now process all callbacks */ 6811da177e4SLinus Torvalds while (!list_empty(&timer->sack_list_head)) { 6821da177e4SLinus Torvalds p = timer->sack_list_head.next; /* get first item */ 68353d2f744STakashi Iwai ti = list_entry(p, struct snd_timer_instance, ack_list); 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds /* remove from ack_list and make empty */ 6861da177e4SLinus Torvalds list_del_init(p); 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds ticks = ti->pticks; 6891da177e4SLinus Torvalds ti->pticks = 0; 6901da177e4SLinus Torvalds resolution = ti->resolution; 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; 6931da177e4SLinus Torvalds spin_unlock(&timer->lock); 6941da177e4SLinus Torvalds if (ti->callback) 6951da177e4SLinus Torvalds ti->callback(ti, resolution, ticks); 6961da177e4SLinus Torvalds spin_lock(&timer->lock); 6971da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; 6981da177e4SLinus Torvalds } 6992999ff5bSTakashi Iwai spin_unlock_irqrestore(&timer->lock, flags); 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds /* 7031da177e4SLinus Torvalds * timer interrupt 7041da177e4SLinus Torvalds * 7051da177e4SLinus Torvalds * ticks_left is usually equal to timer->sticks. 7061da177e4SLinus Torvalds * 7071da177e4SLinus Torvalds */ 70853d2f744STakashi Iwai void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) 7091da177e4SLinus Torvalds { 7109244b2c3SJohannes Berg struct snd_timer_instance *ti, *ts, *tmp; 7111da177e4SLinus Torvalds unsigned long resolution, ticks; 7129244b2c3SJohannes Berg struct list_head *p, *ack_list_head; 713b32425acSTakashi Iwai unsigned long flags; 7141da177e4SLinus Torvalds int use_tasklet = 0; 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds if (timer == NULL) 7171da177e4SLinus Torvalds return; 7181da177e4SLinus Torvalds 719230323daSTakashi Iwai if (timer->card && timer->card->shutdown) 720230323daSTakashi Iwai return; 721230323daSTakashi Iwai 722b32425acSTakashi Iwai spin_lock_irqsave(&timer->lock, flags); 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds /* remember the current resolution */ 7251da177e4SLinus Torvalds if (timer->hw.c_resolution) 7261da177e4SLinus Torvalds resolution = timer->hw.c_resolution(timer); 7271da177e4SLinus Torvalds else 7281da177e4SLinus Torvalds resolution = timer->hw.resolution; 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds /* loop for all active instances 7319244b2c3SJohannes Berg * Here we cannot use list_for_each_entry because the active_list of a 7326b172a85SClemens Ladisch * processed instance is relinked to done_list_head before the callback 7336b172a85SClemens Ladisch * is called. 7341da177e4SLinus Torvalds */ 7359244b2c3SJohannes Berg list_for_each_entry_safe(ti, tmp, &timer->active_list_head, 7369244b2c3SJohannes Berg active_list) { 7371da177e4SLinus Torvalds if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) 7381da177e4SLinus Torvalds continue; 7391da177e4SLinus Torvalds ti->pticks += ticks_left; 7401da177e4SLinus Torvalds ti->resolution = resolution; 7411da177e4SLinus Torvalds if (ti->cticks < ticks_left) 7421da177e4SLinus Torvalds ti->cticks = 0; 7431da177e4SLinus Torvalds else 7441da177e4SLinus Torvalds ti->cticks -= ticks_left; 7451da177e4SLinus Torvalds if (ti->cticks) /* not expired */ 7461da177e4SLinus Torvalds continue; 7471da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { 7481da177e4SLinus Torvalds ti->cticks = ti->ticks; 7491da177e4SLinus Torvalds } else { 7501da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; 751094fd3beSTakashi Iwai --timer->running; 752ee8413b0STakashi Iwai list_del_init(&ti->active_list); 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || 7556b172a85SClemens Ladisch (ti->flags & SNDRV_TIMER_IFLG_FAST)) 7566b172a85SClemens Ladisch ack_list_head = &timer->ack_list_head; 7576b172a85SClemens Ladisch else 7586b172a85SClemens Ladisch ack_list_head = &timer->sack_list_head; 7596b172a85SClemens Ladisch if (list_empty(&ti->ack_list)) 7606b172a85SClemens Ladisch list_add_tail(&ti->ack_list, ack_list_head); 7619244b2c3SJohannes Berg list_for_each_entry(ts, &ti->slave_active_head, active_list) { 7621da177e4SLinus Torvalds ts->pticks = ti->pticks; 7631da177e4SLinus Torvalds ts->resolution = resolution; 7646b172a85SClemens Ladisch if (list_empty(&ts->ack_list)) 7656b172a85SClemens Ladisch list_add_tail(&ts->ack_list, ack_list_head); 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds if (timer->flags & SNDRV_TIMER_FLG_RESCHED) 769cd93fe47SClemens Ladisch snd_timer_reschedule(timer, timer->sticks); 7701da177e4SLinus Torvalds if (timer->running) { 7711da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { 7721da177e4SLinus Torvalds timer->hw.stop(timer); 7731da177e4SLinus Torvalds timer->flags |= SNDRV_TIMER_FLG_CHANGE; 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || 7761da177e4SLinus Torvalds (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { 7771da177e4SLinus Torvalds /* restart timer */ 7781da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; 7791da177e4SLinus Torvalds timer->hw.start(timer); 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds } else { 7821da177e4SLinus Torvalds timer->hw.stop(timer); 7831da177e4SLinus Torvalds } 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds /* now process all fast callbacks */ 7861da177e4SLinus Torvalds while (!list_empty(&timer->ack_list_head)) { 7871da177e4SLinus Torvalds p = timer->ack_list_head.next; /* get first item */ 78853d2f744STakashi Iwai ti = list_entry(p, struct snd_timer_instance, ack_list); 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds /* remove from ack_list and make empty */ 7911da177e4SLinus Torvalds list_del_init(p); 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds ticks = ti->pticks; 7941da177e4SLinus Torvalds ti->pticks = 0; 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; 7971da177e4SLinus Torvalds spin_unlock(&timer->lock); 7981da177e4SLinus Torvalds if (ti->callback) 7991da177e4SLinus Torvalds ti->callback(ti, resolution, ticks); 8001da177e4SLinus Torvalds spin_lock(&timer->lock); 8011da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds /* do we have any slow callbacks? */ 8051da177e4SLinus Torvalds use_tasklet = !list_empty(&timer->sack_list_head); 806b32425acSTakashi Iwai spin_unlock_irqrestore(&timer->lock, flags); 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds if (use_tasklet) 8091f04128aSTakashi Iwai tasklet_schedule(&timer->task_queue); 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds /* 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds */ 8151da177e4SLinus Torvalds 81653d2f744STakashi Iwai int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, 81753d2f744STakashi Iwai struct snd_timer **rtimer) 8181da177e4SLinus Torvalds { 81953d2f744STakashi Iwai struct snd_timer *timer; 8201da177e4SLinus Torvalds int err; 82153d2f744STakashi Iwai static struct snd_device_ops ops = { 8221da177e4SLinus Torvalds .dev_free = snd_timer_dev_free, 8231da177e4SLinus Torvalds .dev_register = snd_timer_dev_register, 824c461482cSTakashi Iwai .dev_disconnect = snd_timer_dev_disconnect, 8251da177e4SLinus Torvalds }; 8261da177e4SLinus Torvalds 8277eaa943cSTakashi Iwai if (snd_BUG_ON(!tid)) 8287eaa943cSTakashi Iwai return -EINVAL; 8297eaa943cSTakashi Iwai if (rtimer) 8301da177e4SLinus Torvalds *rtimer = NULL; 831ca2c0966STakashi Iwai timer = kzalloc(sizeof(*timer), GFP_KERNEL); 832ec0e9937STakashi Iwai if (!timer) 8331da177e4SLinus Torvalds return -ENOMEM; 8341da177e4SLinus Torvalds timer->tmr_class = tid->dev_class; 8351da177e4SLinus Torvalds timer->card = card; 8361da177e4SLinus Torvalds timer->tmr_device = tid->device; 8371da177e4SLinus Torvalds timer->tmr_subdevice = tid->subdevice; 8381da177e4SLinus Torvalds if (id) 8391da177e4SLinus Torvalds strlcpy(timer->id, id, sizeof(timer->id)); 8406b760bb2SVegard Nossum timer->sticks = 1; 8411da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->device_list); 8421da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->open_list_head); 8431da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->active_list_head); 8441da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->ack_list_head); 8451da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->sack_list_head); 8461da177e4SLinus Torvalds spin_lock_init(&timer->lock); 8476b172a85SClemens Ladisch tasklet_init(&timer->task_queue, snd_timer_tasklet, 8486b172a85SClemens Ladisch (unsigned long)timer); 8491da177e4SLinus Torvalds if (card != NULL) { 850de24214dSClemens Ladisch timer->module = card->module; 8516b172a85SClemens Ladisch err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); 8526b172a85SClemens Ladisch if (err < 0) { 8531da177e4SLinus Torvalds snd_timer_free(timer); 8541da177e4SLinus Torvalds return err; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds } 8577eaa943cSTakashi Iwai if (rtimer) 8581da177e4SLinus Torvalds *rtimer = timer; 8591da177e4SLinus Torvalds return 0; 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds 86253d2f744STakashi Iwai static int snd_timer_free(struct snd_timer *timer) 8631da177e4SLinus Torvalds { 8647eaa943cSTakashi Iwai if (!timer) 8657eaa943cSTakashi Iwai return 0; 866c461482cSTakashi Iwai 867c461482cSTakashi Iwai mutex_lock(®ister_mutex); 868c461482cSTakashi Iwai if (! list_empty(&timer->open_list_head)) { 869c461482cSTakashi Iwai struct list_head *p, *n; 870c461482cSTakashi Iwai struct snd_timer_instance *ti; 871cf74dcf3STakashi Iwai pr_warn("ALSA: timer %p is busy?\n", timer); 872c461482cSTakashi Iwai list_for_each_safe(p, n, &timer->open_list_head) { 873c461482cSTakashi Iwai list_del_init(p); 874c461482cSTakashi Iwai ti = list_entry(p, struct snd_timer_instance, open_list); 875c461482cSTakashi Iwai ti->timer = NULL; 876c461482cSTakashi Iwai } 877c461482cSTakashi Iwai } 878c461482cSTakashi Iwai list_del(&timer->device_list); 879c461482cSTakashi Iwai mutex_unlock(®ister_mutex); 880c461482cSTakashi Iwai 8811da177e4SLinus Torvalds if (timer->private_free) 8821da177e4SLinus Torvalds timer->private_free(timer); 8831da177e4SLinus Torvalds kfree(timer); 8841da177e4SLinus Torvalds return 0; 8851da177e4SLinus Torvalds } 8861da177e4SLinus Torvalds 88753d2f744STakashi Iwai static int snd_timer_dev_free(struct snd_device *device) 8881da177e4SLinus Torvalds { 88953d2f744STakashi Iwai struct snd_timer *timer = device->device_data; 8901da177e4SLinus Torvalds return snd_timer_free(timer); 8911da177e4SLinus Torvalds } 8921da177e4SLinus Torvalds 89353d2f744STakashi Iwai static int snd_timer_dev_register(struct snd_device *dev) 8941da177e4SLinus Torvalds { 89553d2f744STakashi Iwai struct snd_timer *timer = dev->device_data; 89653d2f744STakashi Iwai struct snd_timer *timer1; 8971da177e4SLinus Torvalds 8987eaa943cSTakashi Iwai if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) 8997eaa943cSTakashi Iwai return -ENXIO; 9001da177e4SLinus Torvalds if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && 9011da177e4SLinus Torvalds !timer->hw.resolution && timer->hw.c_resolution == NULL) 9021da177e4SLinus Torvalds return -EINVAL; 9031da177e4SLinus Torvalds 9041a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 9059244b2c3SJohannes Berg list_for_each_entry(timer1, &snd_timer_list, device_list) { 9061da177e4SLinus Torvalds if (timer1->tmr_class > timer->tmr_class) 9071da177e4SLinus Torvalds break; 9081da177e4SLinus Torvalds if (timer1->tmr_class < timer->tmr_class) 9091da177e4SLinus Torvalds continue; 9101da177e4SLinus Torvalds if (timer1->card && timer->card) { 9111da177e4SLinus Torvalds if (timer1->card->number > timer->card->number) 9121da177e4SLinus Torvalds break; 9131da177e4SLinus Torvalds if (timer1->card->number < timer->card->number) 9141da177e4SLinus Torvalds continue; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds if (timer1->tmr_device > timer->tmr_device) 9171da177e4SLinus Torvalds break; 9181da177e4SLinus Torvalds if (timer1->tmr_device < timer->tmr_device) 9191da177e4SLinus Torvalds continue; 9201da177e4SLinus Torvalds if (timer1->tmr_subdevice > timer->tmr_subdevice) 9211da177e4SLinus Torvalds break; 9221da177e4SLinus Torvalds if (timer1->tmr_subdevice < timer->tmr_subdevice) 9231da177e4SLinus Torvalds continue; 9241da177e4SLinus Torvalds /* conflicts.. */ 9251a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 9261da177e4SLinus Torvalds return -EBUSY; 9271da177e4SLinus Torvalds } 9289244b2c3SJohannes Berg list_add_tail(&timer->device_list, &timer1->device_list); 9291a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 9301da177e4SLinus Torvalds return 0; 9311da177e4SLinus Torvalds } 9321da177e4SLinus Torvalds 933c461482cSTakashi Iwai static int snd_timer_dev_disconnect(struct snd_device *device) 9341da177e4SLinus Torvalds { 93553d2f744STakashi Iwai struct snd_timer *timer = device->device_data; 936230323daSTakashi Iwai struct snd_timer_instance *ti; 937230323daSTakashi Iwai 938c461482cSTakashi Iwai mutex_lock(®ister_mutex); 939c461482cSTakashi Iwai list_del_init(&timer->device_list); 940230323daSTakashi Iwai /* wake up pending sleepers */ 941230323daSTakashi Iwai list_for_each_entry(ti, &timer->open_list_head, open_list) { 94240ed9444STakashi Iwai if (ti->disconnect) 94340ed9444STakashi Iwai ti->disconnect(ti); 944230323daSTakashi Iwai } 945c461482cSTakashi Iwai mutex_unlock(®ister_mutex); 946c461482cSTakashi Iwai return 0; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 94953d2f744STakashi Iwai void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) 9501da177e4SLinus Torvalds { 9511da177e4SLinus Torvalds unsigned long flags; 9521da177e4SLinus Torvalds unsigned long resolution = 0; 95353d2f744STakashi Iwai struct snd_timer_instance *ti, *ts; 9541da177e4SLinus Torvalds 955230323daSTakashi Iwai if (timer->card && timer->card->shutdown) 956230323daSTakashi Iwai return; 9577c22f1aaSTakashi Iwai if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) 9587c22f1aaSTakashi Iwai return; 9597eaa943cSTakashi Iwai if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || 9607eaa943cSTakashi Iwai event > SNDRV_TIMER_EVENT_MRESUME)) 9617eaa943cSTakashi Iwai return; 9621da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 963a501dfa3SJaroslav Kysela if (event == SNDRV_TIMER_EVENT_MSTART || 964a501dfa3SJaroslav Kysela event == SNDRV_TIMER_EVENT_MCONTINUE || 965a501dfa3SJaroslav Kysela event == SNDRV_TIMER_EVENT_MRESUME) { 9661da177e4SLinus Torvalds if (timer->hw.c_resolution) 9671da177e4SLinus Torvalds resolution = timer->hw.c_resolution(timer); 9681da177e4SLinus Torvalds else 9691da177e4SLinus Torvalds resolution = timer->hw.resolution; 9701da177e4SLinus Torvalds } 9719244b2c3SJohannes Berg list_for_each_entry(ti, &timer->active_list_head, active_list) { 9721da177e4SLinus Torvalds if (ti->ccallback) 9731da177e4SLinus Torvalds ti->ccallback(ti, event, tstamp, resolution); 9749244b2c3SJohannes Berg list_for_each_entry(ts, &ti->slave_active_head, active_list) 9751da177e4SLinus Torvalds if (ts->ccallback) 9761da177e4SLinus Torvalds ts->ccallback(ts, event, tstamp, resolution); 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds /* 9821da177e4SLinus Torvalds * exported functions for global timers 9831da177e4SLinus Torvalds */ 98453d2f744STakashi Iwai int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) 9851da177e4SLinus Torvalds { 98653d2f744STakashi Iwai struct snd_timer_id tid; 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; 9891da177e4SLinus Torvalds tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; 9901da177e4SLinus Torvalds tid.card = -1; 9911da177e4SLinus Torvalds tid.device = device; 9921da177e4SLinus Torvalds tid.subdevice = 0; 9931da177e4SLinus Torvalds return snd_timer_new(NULL, id, &tid, rtimer); 9941da177e4SLinus Torvalds } 9951da177e4SLinus Torvalds 99653d2f744STakashi Iwai int snd_timer_global_free(struct snd_timer *timer) 9971da177e4SLinus Torvalds { 9981da177e4SLinus Torvalds return snd_timer_free(timer); 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds 100153d2f744STakashi Iwai int snd_timer_global_register(struct snd_timer *timer) 10021da177e4SLinus Torvalds { 100353d2f744STakashi Iwai struct snd_device dev; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds memset(&dev, 0, sizeof(dev)); 10061da177e4SLinus Torvalds dev.device_data = timer; 10071da177e4SLinus Torvalds return snd_timer_dev_register(&dev); 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds /* 10111da177e4SLinus Torvalds * System timer 10121da177e4SLinus Torvalds */ 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds struct snd_timer_system_private { 10151da177e4SLinus Torvalds struct timer_list tlist; 10161da177e4SLinus Torvalds unsigned long last_expires; 10171da177e4SLinus Torvalds unsigned long last_jiffies; 10181da177e4SLinus Torvalds unsigned long correction; 10191da177e4SLinus Torvalds }; 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds static void snd_timer_s_function(unsigned long data) 10221da177e4SLinus Torvalds { 102353d2f744STakashi Iwai struct snd_timer *timer = (struct snd_timer *)data; 10241da177e4SLinus Torvalds struct snd_timer_system_private *priv = timer->private_data; 10251da177e4SLinus Torvalds unsigned long jiff = jiffies; 10261da177e4SLinus Torvalds if (time_after(jiff, priv->last_expires)) 10276ed5eff0SClemens Ladisch priv->correction += (long)jiff - (long)priv->last_expires; 10281da177e4SLinus Torvalds snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds 103153d2f744STakashi Iwai static int snd_timer_s_start(struct snd_timer * timer) 10321da177e4SLinus Torvalds { 10331da177e4SLinus Torvalds struct snd_timer_system_private *priv; 10341da177e4SLinus Torvalds unsigned long njiff; 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds priv = (struct snd_timer_system_private *) timer->private_data; 10371da177e4SLinus Torvalds njiff = (priv->last_jiffies = jiffies); 10381da177e4SLinus Torvalds if (priv->correction > timer->sticks - 1) { 10391da177e4SLinus Torvalds priv->correction -= timer->sticks - 1; 10401da177e4SLinus Torvalds njiff++; 10411da177e4SLinus Torvalds } else { 10421da177e4SLinus Torvalds njiff += timer->sticks - priv->correction; 104317f48ec3SClemens Ladisch priv->correction = 0; 10441da177e4SLinus Torvalds } 10454a07083eSTakashi Iwai priv->last_expires = njiff; 10464a07083eSTakashi Iwai mod_timer(&priv->tlist, njiff); 10471da177e4SLinus Torvalds return 0; 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 105053d2f744STakashi Iwai static int snd_timer_s_stop(struct snd_timer * timer) 10511da177e4SLinus Torvalds { 10521da177e4SLinus Torvalds struct snd_timer_system_private *priv; 10531da177e4SLinus Torvalds unsigned long jiff; 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds priv = (struct snd_timer_system_private *) timer->private_data; 10561da177e4SLinus Torvalds del_timer(&priv->tlist); 10571da177e4SLinus Torvalds jiff = jiffies; 10581da177e4SLinus Torvalds if (time_before(jiff, priv->last_expires)) 10591da177e4SLinus Torvalds timer->sticks = priv->last_expires - jiff; 10601da177e4SLinus Torvalds else 10611da177e4SLinus Torvalds timer->sticks = 1; 1062de2696d8SClemens Ladisch priv->correction = 0; 10631da177e4SLinus Torvalds return 0; 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 1066f146357fSTakashi Iwai static int snd_timer_s_close(struct snd_timer *timer) 1067f146357fSTakashi Iwai { 1068f146357fSTakashi Iwai struct snd_timer_system_private *priv; 1069f146357fSTakashi Iwai 1070f146357fSTakashi Iwai priv = (struct snd_timer_system_private *)timer->private_data; 1071f146357fSTakashi Iwai del_timer_sync(&priv->tlist); 1072f146357fSTakashi Iwai return 0; 1073f146357fSTakashi Iwai } 1074f146357fSTakashi Iwai 107553d2f744STakashi Iwai static struct snd_timer_hardware snd_timer_system = 10761da177e4SLinus Torvalds { 10771da177e4SLinus Torvalds .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, 10781da177e4SLinus Torvalds .resolution = 1000000000L / HZ, 10791da177e4SLinus Torvalds .ticks = 10000000L, 1080f146357fSTakashi Iwai .close = snd_timer_s_close, 10811da177e4SLinus Torvalds .start = snd_timer_s_start, 10821da177e4SLinus Torvalds .stop = snd_timer_s_stop 10831da177e4SLinus Torvalds }; 10841da177e4SLinus Torvalds 108553d2f744STakashi Iwai static void snd_timer_free_system(struct snd_timer *timer) 10861da177e4SLinus Torvalds { 10871da177e4SLinus Torvalds kfree(timer->private_data); 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds static int snd_timer_register_system(void) 10911da177e4SLinus Torvalds { 109253d2f744STakashi Iwai struct snd_timer *timer; 10931da177e4SLinus Torvalds struct snd_timer_system_private *priv; 10941da177e4SLinus Torvalds int err; 10951da177e4SLinus Torvalds 10966b172a85SClemens Ladisch err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); 10976b172a85SClemens Ladisch if (err < 0) 10981da177e4SLinus Torvalds return err; 10991da177e4SLinus Torvalds strcpy(timer->name, "system timer"); 11001da177e4SLinus Torvalds timer->hw = snd_timer_system; 1101ca2c0966STakashi Iwai priv = kzalloc(sizeof(*priv), GFP_KERNEL); 11021da177e4SLinus Torvalds if (priv == NULL) { 11031da177e4SLinus Torvalds snd_timer_free(timer); 11041da177e4SLinus Torvalds return -ENOMEM; 11051da177e4SLinus Torvalds } 1106f169c105STakashi Iwai setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); 11071da177e4SLinus Torvalds timer->private_data = priv; 11081da177e4SLinus Torvalds timer->private_free = snd_timer_free_system; 11091da177e4SLinus Torvalds return snd_timer_global_register(timer); 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 1112cd6a6503SJie Yang #ifdef CONFIG_SND_PROC_FS 11131da177e4SLinus Torvalds /* 11141da177e4SLinus Torvalds * Info interface 11151da177e4SLinus Torvalds */ 11161da177e4SLinus Torvalds 111753d2f744STakashi Iwai static void snd_timer_proc_read(struct snd_info_entry *entry, 111853d2f744STakashi Iwai struct snd_info_buffer *buffer) 11191da177e4SLinus Torvalds { 112053d2f744STakashi Iwai struct snd_timer *timer; 112153d2f744STakashi Iwai struct snd_timer_instance *ti; 11221da177e4SLinus Torvalds 11231a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 11249244b2c3SJohannes Berg list_for_each_entry(timer, &snd_timer_list, device_list) { 1125230323daSTakashi Iwai if (timer->card && timer->card->shutdown) 1126230323daSTakashi Iwai continue; 11271da177e4SLinus Torvalds switch (timer->tmr_class) { 11281da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_GLOBAL: 11291da177e4SLinus Torvalds snd_iprintf(buffer, "G%i: ", timer->tmr_device); 11301da177e4SLinus Torvalds break; 11311da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_CARD: 11326b172a85SClemens Ladisch snd_iprintf(buffer, "C%i-%i: ", 11336b172a85SClemens Ladisch timer->card->number, timer->tmr_device); 11341da177e4SLinus Torvalds break; 11351da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_PCM: 11366b172a85SClemens Ladisch snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, 11376b172a85SClemens Ladisch timer->tmr_device, timer->tmr_subdevice); 11381da177e4SLinus Torvalds break; 11391da177e4SLinus Torvalds default: 11406b172a85SClemens Ladisch snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, 11416b172a85SClemens Ladisch timer->card ? timer->card->number : -1, 11426b172a85SClemens Ladisch timer->tmr_device, timer->tmr_subdevice); 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds snd_iprintf(buffer, "%s :", timer->name); 11451da177e4SLinus Torvalds if (timer->hw.resolution) 11466b172a85SClemens Ladisch snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", 11476b172a85SClemens Ladisch timer->hw.resolution / 1000, 11486b172a85SClemens Ladisch timer->hw.resolution % 1000, 11496b172a85SClemens Ladisch timer->hw.ticks); 11501da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) 11511da177e4SLinus Torvalds snd_iprintf(buffer, " SLAVE"); 11521da177e4SLinus Torvalds snd_iprintf(buffer, "\n"); 11539244b2c3SJohannes Berg list_for_each_entry(ti, &timer->open_list_head, open_list) 11546b172a85SClemens Ladisch snd_iprintf(buffer, " Client %s : %s\n", 11551da177e4SLinus Torvalds ti->owner ? ti->owner : "unknown", 11566b172a85SClemens Ladisch ti->flags & (SNDRV_TIMER_IFLG_START | 11576b172a85SClemens Ladisch SNDRV_TIMER_IFLG_RUNNING) 11586b172a85SClemens Ladisch ? "running" : "stopped"); 11591da177e4SLinus Torvalds } 11601a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds 11636581f4e7STakashi Iwai static struct snd_info_entry *snd_timer_proc_entry; 1164e28563ccSTakashi Iwai 1165e28563ccSTakashi Iwai static void __init snd_timer_proc_init(void) 1166e28563ccSTakashi Iwai { 1167e28563ccSTakashi Iwai struct snd_info_entry *entry; 1168e28563ccSTakashi Iwai 1169e28563ccSTakashi Iwai entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); 1170e28563ccSTakashi Iwai if (entry != NULL) { 1171e28563ccSTakashi Iwai entry->c.text.read = snd_timer_proc_read; 1172e28563ccSTakashi Iwai if (snd_info_register(entry) < 0) { 1173e28563ccSTakashi Iwai snd_info_free_entry(entry); 1174e28563ccSTakashi Iwai entry = NULL; 1175e28563ccSTakashi Iwai } 1176e28563ccSTakashi Iwai } 1177e28563ccSTakashi Iwai snd_timer_proc_entry = entry; 1178e28563ccSTakashi Iwai } 1179e28563ccSTakashi Iwai 1180e28563ccSTakashi Iwai static void __exit snd_timer_proc_done(void) 1181e28563ccSTakashi Iwai { 1182746d4a02STakashi Iwai snd_info_free_entry(snd_timer_proc_entry); 1183e28563ccSTakashi Iwai } 1184cd6a6503SJie Yang #else /* !CONFIG_SND_PROC_FS */ 1185e28563ccSTakashi Iwai #define snd_timer_proc_init() 1186e28563ccSTakashi Iwai #define snd_timer_proc_done() 1187e28563ccSTakashi Iwai #endif 1188e28563ccSTakashi Iwai 11891da177e4SLinus Torvalds /* 11901da177e4SLinus Torvalds * USER SPACE interface 11911da177e4SLinus Torvalds */ 11921da177e4SLinus Torvalds 119353d2f744STakashi Iwai static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, 11941da177e4SLinus Torvalds unsigned long resolution, 11951da177e4SLinus Torvalds unsigned long ticks) 11961da177e4SLinus Torvalds { 119753d2f744STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 119853d2f744STakashi Iwai struct snd_timer_read *r; 11991da177e4SLinus Torvalds int prev; 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds spin_lock(&tu->qlock); 12021da177e4SLinus Torvalds if (tu->qused > 0) { 12031da177e4SLinus Torvalds prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; 12041da177e4SLinus Torvalds r = &tu->queue[prev]; 12051da177e4SLinus Torvalds if (r->resolution == resolution) { 12061da177e4SLinus Torvalds r->ticks += ticks; 12071da177e4SLinus Torvalds goto __wake; 12081da177e4SLinus Torvalds } 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds if (tu->qused >= tu->queue_size) { 12111da177e4SLinus Torvalds tu->overrun++; 12121da177e4SLinus Torvalds } else { 12131da177e4SLinus Torvalds r = &tu->queue[tu->qtail++]; 12141da177e4SLinus Torvalds tu->qtail %= tu->queue_size; 12151da177e4SLinus Torvalds r->resolution = resolution; 12161da177e4SLinus Torvalds r->ticks = ticks; 12171da177e4SLinus Torvalds tu->qused++; 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds __wake: 12201da177e4SLinus Torvalds spin_unlock(&tu->qlock); 12211da177e4SLinus Torvalds kill_fasync(&tu->fasync, SIGIO, POLL_IN); 12221da177e4SLinus Torvalds wake_up(&tu->qchange_sleep); 12231da177e4SLinus Torvalds } 12241da177e4SLinus Torvalds 122553d2f744STakashi Iwai static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, 122653d2f744STakashi Iwai struct snd_timer_tread *tread) 12271da177e4SLinus Torvalds { 12281da177e4SLinus Torvalds if (tu->qused >= tu->queue_size) { 12291da177e4SLinus Torvalds tu->overrun++; 12301da177e4SLinus Torvalds } else { 12311da177e4SLinus Torvalds memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); 12321da177e4SLinus Torvalds tu->qtail %= tu->queue_size; 12331da177e4SLinus Torvalds tu->qused++; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds 123753d2f744STakashi Iwai static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, 123853d2f744STakashi Iwai int event, 12391da177e4SLinus Torvalds struct timespec *tstamp, 12401da177e4SLinus Torvalds unsigned long resolution) 12411da177e4SLinus Torvalds { 124253d2f744STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 124353d2f744STakashi Iwai struct snd_timer_tread r1; 1244bfe70783SDan Carpenter unsigned long flags; 12451da177e4SLinus Torvalds 12466b172a85SClemens Ladisch if (event >= SNDRV_TIMER_EVENT_START && 12476b172a85SClemens Ladisch event <= SNDRV_TIMER_EVENT_PAUSE) 12481da177e4SLinus Torvalds tu->tstamp = *tstamp; 12491da177e4SLinus Torvalds if ((tu->filter & (1 << event)) == 0 || !tu->tread) 12501da177e4SLinus Torvalds return; 12519a47e9cfSKangjie Lu memset(&r1, 0, sizeof(r1)); 12521da177e4SLinus Torvalds r1.event = event; 12531da177e4SLinus Torvalds r1.tstamp = *tstamp; 12541da177e4SLinus Torvalds r1.val = resolution; 1255bfe70783SDan Carpenter spin_lock_irqsave(&tu->qlock, flags); 12561da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &r1); 1257bfe70783SDan Carpenter spin_unlock_irqrestore(&tu->qlock, flags); 12581da177e4SLinus Torvalds kill_fasync(&tu->fasync, SIGIO, POLL_IN); 12591da177e4SLinus Torvalds wake_up(&tu->qchange_sleep); 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 126240ed9444STakashi Iwai static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) 126340ed9444STakashi Iwai { 126440ed9444STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 126540ed9444STakashi Iwai 126640ed9444STakashi Iwai tu->disconnected = true; 126740ed9444STakashi Iwai wake_up(&tu->qchange_sleep); 126840ed9444STakashi Iwai } 126940ed9444STakashi Iwai 127053d2f744STakashi Iwai static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, 12711da177e4SLinus Torvalds unsigned long resolution, 12721da177e4SLinus Torvalds unsigned long ticks) 12731da177e4SLinus Torvalds { 127453d2f744STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 127553d2f744STakashi Iwai struct snd_timer_tread *r, r1; 12761da177e4SLinus Torvalds struct timespec tstamp; 12771da177e4SLinus Torvalds int prev, append = 0; 12781da177e4SLinus Torvalds 127907799e75STakashi Iwai memset(&tstamp, 0, sizeof(tstamp)); 12801da177e4SLinus Torvalds spin_lock(&tu->qlock); 12816b172a85SClemens Ladisch if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | 12826b172a85SClemens Ladisch (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { 12831da177e4SLinus Torvalds spin_unlock(&tu->qlock); 12841da177e4SLinus Torvalds return; 12851da177e4SLinus Torvalds } 1286b751eef1SJaroslav Kysela if (tu->last_resolution != resolution || ticks > 0) { 1287b751eef1SJaroslav Kysela if (timer_tstamp_monotonic) 128826204e04SThomas Gleixner ktime_get_ts(&tstamp); 1289b751eef1SJaroslav Kysela else 129007799e75STakashi Iwai getnstimeofday(&tstamp); 1291b751eef1SJaroslav Kysela } 12926b172a85SClemens Ladisch if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && 12936b172a85SClemens Ladisch tu->last_resolution != resolution) { 1294e4ec8cc8SKangjie Lu memset(&r1, 0, sizeof(r1)); 12951da177e4SLinus Torvalds r1.event = SNDRV_TIMER_EVENT_RESOLUTION; 12961da177e4SLinus Torvalds r1.tstamp = tstamp; 12971da177e4SLinus Torvalds r1.val = resolution; 12981da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &r1); 12991da177e4SLinus Torvalds tu->last_resolution = resolution; 13001da177e4SLinus Torvalds append++; 13011da177e4SLinus Torvalds } 13021da177e4SLinus Torvalds if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) 13031da177e4SLinus Torvalds goto __wake; 13041da177e4SLinus Torvalds if (ticks == 0) 13051da177e4SLinus Torvalds goto __wake; 13061da177e4SLinus Torvalds if (tu->qused > 0) { 13071da177e4SLinus Torvalds prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; 13081da177e4SLinus Torvalds r = &tu->tqueue[prev]; 13091da177e4SLinus Torvalds if (r->event == SNDRV_TIMER_EVENT_TICK) { 13101da177e4SLinus Torvalds r->tstamp = tstamp; 13111da177e4SLinus Torvalds r->val += ticks; 13121da177e4SLinus Torvalds append++; 13131da177e4SLinus Torvalds goto __wake; 13141da177e4SLinus Torvalds } 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds r1.event = SNDRV_TIMER_EVENT_TICK; 13171da177e4SLinus Torvalds r1.tstamp = tstamp; 13181da177e4SLinus Torvalds r1.val = ticks; 13191da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &r1); 13201da177e4SLinus Torvalds append++; 13211da177e4SLinus Torvalds __wake: 13221da177e4SLinus Torvalds spin_unlock(&tu->qlock); 13231da177e4SLinus Torvalds if (append == 0) 13241da177e4SLinus Torvalds return; 13251da177e4SLinus Torvalds kill_fasync(&tu->fasync, SIGIO, POLL_IN); 13261da177e4SLinus Torvalds wake_up(&tu->qchange_sleep); 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds static int snd_timer_user_open(struct inode *inode, struct file *file) 13301da177e4SLinus Torvalds { 133153d2f744STakashi Iwai struct snd_timer_user *tu; 133202f4865fSTakashi Iwai int err; 133302f4865fSTakashi Iwai 133402f4865fSTakashi Iwai err = nonseekable_open(inode, file); 133502f4865fSTakashi Iwai if (err < 0) 133602f4865fSTakashi Iwai return err; 13371da177e4SLinus Torvalds 1338ca2c0966STakashi Iwai tu = kzalloc(sizeof(*tu), GFP_KERNEL); 13391da177e4SLinus Torvalds if (tu == NULL) 13401da177e4SLinus Torvalds return -ENOMEM; 13411da177e4SLinus Torvalds spin_lock_init(&tu->qlock); 13421da177e4SLinus Torvalds init_waitqueue_head(&tu->qchange_sleep); 1343af368027STakashi Iwai mutex_init(&tu->ioctl_lock); 13441da177e4SLinus Torvalds tu->ticks = 1; 13451da177e4SLinus Torvalds tu->queue_size = 128; 134653d2f744STakashi Iwai tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), 13476b172a85SClemens Ladisch GFP_KERNEL); 13481da177e4SLinus Torvalds if (tu->queue == NULL) { 13491da177e4SLinus Torvalds kfree(tu); 13501da177e4SLinus Torvalds return -ENOMEM; 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds file->private_data = tu; 13531da177e4SLinus Torvalds return 0; 13541da177e4SLinus Torvalds } 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds static int snd_timer_user_release(struct inode *inode, struct file *file) 13571da177e4SLinus Torvalds { 135853d2f744STakashi Iwai struct snd_timer_user *tu; 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds if (file->private_data) { 13611da177e4SLinus Torvalds tu = file->private_data; 13621da177e4SLinus Torvalds file->private_data = NULL; 1363af368027STakashi Iwai mutex_lock(&tu->ioctl_lock); 13641da177e4SLinus Torvalds if (tu->timeri) 13651da177e4SLinus Torvalds snd_timer_close(tu->timeri); 1366af368027STakashi Iwai mutex_unlock(&tu->ioctl_lock); 13671da177e4SLinus Torvalds kfree(tu->queue); 13681da177e4SLinus Torvalds kfree(tu->tqueue); 13691da177e4SLinus Torvalds kfree(tu); 13701da177e4SLinus Torvalds } 13711da177e4SLinus Torvalds return 0; 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds 137453d2f744STakashi Iwai static void snd_timer_user_zero_id(struct snd_timer_id *id) 13751da177e4SLinus Torvalds { 13761da177e4SLinus Torvalds id->dev_class = SNDRV_TIMER_CLASS_NONE; 13771da177e4SLinus Torvalds id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; 13781da177e4SLinus Torvalds id->card = -1; 13791da177e4SLinus Torvalds id->device = -1; 13801da177e4SLinus Torvalds id->subdevice = -1; 13811da177e4SLinus Torvalds } 13821da177e4SLinus Torvalds 138353d2f744STakashi Iwai static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) 13841da177e4SLinus Torvalds { 13851da177e4SLinus Torvalds id->dev_class = timer->tmr_class; 13861da177e4SLinus Torvalds id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; 13871da177e4SLinus Torvalds id->card = timer->card ? timer->card->number : -1; 13881da177e4SLinus Torvalds id->device = timer->tmr_device; 13891da177e4SLinus Torvalds id->subdevice = timer->tmr_subdevice; 13901da177e4SLinus Torvalds } 13911da177e4SLinus Torvalds 139253d2f744STakashi Iwai static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) 13931da177e4SLinus Torvalds { 139453d2f744STakashi Iwai struct snd_timer_id id; 139553d2f744STakashi Iwai struct snd_timer *timer; 13961da177e4SLinus Torvalds struct list_head *p; 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds if (copy_from_user(&id, _tid, sizeof(id))) 13991da177e4SLinus Torvalds return -EFAULT; 14001a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 14011da177e4SLinus Torvalds if (id.dev_class < 0) { /* first item */ 14021da177e4SLinus Torvalds if (list_empty(&snd_timer_list)) 14031da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 14041da177e4SLinus Torvalds else { 14059dfba380SClemens Ladisch timer = list_entry(snd_timer_list.next, 140653d2f744STakashi Iwai struct snd_timer, device_list); 14071da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds } else { 14101da177e4SLinus Torvalds switch (id.dev_class) { 14111da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_GLOBAL: 14121da177e4SLinus Torvalds id.device = id.device < 0 ? 0 : id.device + 1; 14131da177e4SLinus Torvalds list_for_each(p, &snd_timer_list) { 141453d2f744STakashi Iwai timer = list_entry(p, struct snd_timer, device_list); 14151da177e4SLinus Torvalds if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { 14161da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14171da177e4SLinus Torvalds break; 14181da177e4SLinus Torvalds } 14191da177e4SLinus Torvalds if (timer->tmr_device >= id.device) { 14201da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14211da177e4SLinus Torvalds break; 14221da177e4SLinus Torvalds } 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds if (p == &snd_timer_list) 14251da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 14261da177e4SLinus Torvalds break; 14271da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_CARD: 14281da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_PCM: 14291da177e4SLinus Torvalds if (id.card < 0) { 14301da177e4SLinus Torvalds id.card = 0; 14311da177e4SLinus Torvalds } else { 14321da177e4SLinus Torvalds if (id.card < 0) { 14331da177e4SLinus Torvalds id.card = 0; 14341da177e4SLinus Torvalds } else { 14351da177e4SLinus Torvalds if (id.device < 0) { 14361da177e4SLinus Torvalds id.device = 0; 14371da177e4SLinus Torvalds } else { 14386b172a85SClemens Ladisch if (id.subdevice < 0) { 14396b172a85SClemens Ladisch id.subdevice = 0; 14406b172a85SClemens Ladisch } else { 14416b172a85SClemens Ladisch id.subdevice++; 14426b172a85SClemens Ladisch } 14431da177e4SLinus Torvalds } 14441da177e4SLinus Torvalds } 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds list_for_each(p, &snd_timer_list) { 144753d2f744STakashi Iwai timer = list_entry(p, struct snd_timer, device_list); 14481da177e4SLinus Torvalds if (timer->tmr_class > id.dev_class) { 14491da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14501da177e4SLinus Torvalds break; 14511da177e4SLinus Torvalds } 14521da177e4SLinus Torvalds if (timer->tmr_class < id.dev_class) 14531da177e4SLinus Torvalds continue; 14541da177e4SLinus Torvalds if (timer->card->number > id.card) { 14551da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14561da177e4SLinus Torvalds break; 14571da177e4SLinus Torvalds } 14581da177e4SLinus Torvalds if (timer->card->number < id.card) 14591da177e4SLinus Torvalds continue; 14601da177e4SLinus Torvalds if (timer->tmr_device > id.device) { 14611da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14621da177e4SLinus Torvalds break; 14631da177e4SLinus Torvalds } 14641da177e4SLinus Torvalds if (timer->tmr_device < id.device) 14651da177e4SLinus Torvalds continue; 14661da177e4SLinus Torvalds if (timer->tmr_subdevice > id.subdevice) { 14671da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14681da177e4SLinus Torvalds break; 14691da177e4SLinus Torvalds } 14701da177e4SLinus Torvalds if (timer->tmr_subdevice < id.subdevice) 14711da177e4SLinus Torvalds continue; 14721da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 14731da177e4SLinus Torvalds break; 14741da177e4SLinus Torvalds } 14751da177e4SLinus Torvalds if (p == &snd_timer_list) 14761da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 14771da177e4SLinus Torvalds break; 14781da177e4SLinus Torvalds default: 14791da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 14801da177e4SLinus Torvalds } 14811da177e4SLinus Torvalds } 14821a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 14831da177e4SLinus Torvalds if (copy_to_user(_tid, &id, sizeof(*_tid))) 14841da177e4SLinus Torvalds return -EFAULT; 14851da177e4SLinus Torvalds return 0; 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds 14886b172a85SClemens Ladisch static int snd_timer_user_ginfo(struct file *file, 148953d2f744STakashi Iwai struct snd_timer_ginfo __user *_ginfo) 14901da177e4SLinus Torvalds { 149153d2f744STakashi Iwai struct snd_timer_ginfo *ginfo; 149253d2f744STakashi Iwai struct snd_timer_id tid; 149353d2f744STakashi Iwai struct snd_timer *t; 14941da177e4SLinus Torvalds struct list_head *p; 14951da177e4SLinus Torvalds int err = 0; 14961da177e4SLinus Torvalds 1497ef44a1ecSLi Zefan ginfo = memdup_user(_ginfo, sizeof(*ginfo)); 1498ef44a1ecSLi Zefan if (IS_ERR(ginfo)) 1499ef44a1ecSLi Zefan return PTR_ERR(ginfo); 1500ef44a1ecSLi Zefan 15011da177e4SLinus Torvalds tid = ginfo->tid; 15021da177e4SLinus Torvalds memset(ginfo, 0, sizeof(*ginfo)); 15031da177e4SLinus Torvalds ginfo->tid = tid; 15041a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 15051da177e4SLinus Torvalds t = snd_timer_find(&tid); 15061da177e4SLinus Torvalds if (t != NULL) { 15071da177e4SLinus Torvalds ginfo->card = t->card ? t->card->number : -1; 15081da177e4SLinus Torvalds if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) 15091da177e4SLinus Torvalds ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; 15101da177e4SLinus Torvalds strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); 15111da177e4SLinus Torvalds strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); 15121da177e4SLinus Torvalds ginfo->resolution = t->hw.resolution; 15131da177e4SLinus Torvalds if (t->hw.resolution_min > 0) { 15141da177e4SLinus Torvalds ginfo->resolution_min = t->hw.resolution_min; 15151da177e4SLinus Torvalds ginfo->resolution_max = t->hw.resolution_max; 15161da177e4SLinus Torvalds } 15171da177e4SLinus Torvalds list_for_each(p, &t->open_list_head) { 15181da177e4SLinus Torvalds ginfo->clients++; 15191da177e4SLinus Torvalds } 15201da177e4SLinus Torvalds } else { 15211da177e4SLinus Torvalds err = -ENODEV; 15221da177e4SLinus Torvalds } 15231a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 15241da177e4SLinus Torvalds if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) 15251da177e4SLinus Torvalds err = -EFAULT; 15261da177e4SLinus Torvalds kfree(ginfo); 15271da177e4SLinus Torvalds return err; 15281da177e4SLinus Torvalds } 15291da177e4SLinus Torvalds 153091d2178eSTakashi Sakamoto static int timer_set_gparams(struct snd_timer_gparams *gparams) 15311da177e4SLinus Torvalds { 153253d2f744STakashi Iwai struct snd_timer *t; 15331da177e4SLinus Torvalds int err; 15341da177e4SLinus Torvalds 15351a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 153691d2178eSTakashi Sakamoto t = snd_timer_find(&gparams->tid); 15376b172a85SClemens Ladisch if (!t) { 15381da177e4SLinus Torvalds err = -ENODEV; 15396b172a85SClemens Ladisch goto _error; 15401da177e4SLinus Torvalds } 15416b172a85SClemens Ladisch if (!list_empty(&t->open_list_head)) { 15426b172a85SClemens Ladisch err = -EBUSY; 15436b172a85SClemens Ladisch goto _error; 15446b172a85SClemens Ladisch } 15456b172a85SClemens Ladisch if (!t->hw.set_period) { 15466b172a85SClemens Ladisch err = -ENOSYS; 15476b172a85SClemens Ladisch goto _error; 15486b172a85SClemens Ladisch } 154991d2178eSTakashi Sakamoto err = t->hw.set_period(t, gparams->period_num, gparams->period_den); 15506b172a85SClemens Ladisch _error: 15511a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 15521da177e4SLinus Torvalds return err; 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds 155591d2178eSTakashi Sakamoto static int snd_timer_user_gparams(struct file *file, 155691d2178eSTakashi Sakamoto struct snd_timer_gparams __user *_gparams) 155791d2178eSTakashi Sakamoto { 155891d2178eSTakashi Sakamoto struct snd_timer_gparams gparams; 155991d2178eSTakashi Sakamoto 156091d2178eSTakashi Sakamoto if (copy_from_user(&gparams, _gparams, sizeof(gparams))) 156191d2178eSTakashi Sakamoto return -EFAULT; 156291d2178eSTakashi Sakamoto return timer_set_gparams(&gparams); 156391d2178eSTakashi Sakamoto } 156491d2178eSTakashi Sakamoto 15656b172a85SClemens Ladisch static int snd_timer_user_gstatus(struct file *file, 156653d2f744STakashi Iwai struct snd_timer_gstatus __user *_gstatus) 15671da177e4SLinus Torvalds { 156853d2f744STakashi Iwai struct snd_timer_gstatus gstatus; 156953d2f744STakashi Iwai struct snd_timer_id tid; 157053d2f744STakashi Iwai struct snd_timer *t; 15711da177e4SLinus Torvalds int err = 0; 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) 15741da177e4SLinus Torvalds return -EFAULT; 15751da177e4SLinus Torvalds tid = gstatus.tid; 15761da177e4SLinus Torvalds memset(&gstatus, 0, sizeof(gstatus)); 15771da177e4SLinus Torvalds gstatus.tid = tid; 15781a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 15791da177e4SLinus Torvalds t = snd_timer_find(&tid); 15801da177e4SLinus Torvalds if (t != NULL) { 15811da177e4SLinus Torvalds if (t->hw.c_resolution) 15821da177e4SLinus Torvalds gstatus.resolution = t->hw.c_resolution(t); 15831da177e4SLinus Torvalds else 15841da177e4SLinus Torvalds gstatus.resolution = t->hw.resolution; 15851da177e4SLinus Torvalds if (t->hw.precise_resolution) { 15866b172a85SClemens Ladisch t->hw.precise_resolution(t, &gstatus.resolution_num, 15876b172a85SClemens Ladisch &gstatus.resolution_den); 15881da177e4SLinus Torvalds } else { 15891da177e4SLinus Torvalds gstatus.resolution_num = gstatus.resolution; 15901da177e4SLinus Torvalds gstatus.resolution_den = 1000000000uL; 15911da177e4SLinus Torvalds } 15921da177e4SLinus Torvalds } else { 15931da177e4SLinus Torvalds err = -ENODEV; 15941da177e4SLinus Torvalds } 15951a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 15961da177e4SLinus Torvalds if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) 15971da177e4SLinus Torvalds err = -EFAULT; 15981da177e4SLinus Torvalds return err; 15991da177e4SLinus Torvalds } 16001da177e4SLinus Torvalds 16016b172a85SClemens Ladisch static int snd_timer_user_tselect(struct file *file, 160253d2f744STakashi Iwai struct snd_timer_select __user *_tselect) 16031da177e4SLinus Torvalds { 160453d2f744STakashi Iwai struct snd_timer_user *tu; 160553d2f744STakashi Iwai struct snd_timer_select tselect; 16061da177e4SLinus Torvalds char str[32]; 1607c1935b4dSJaroslav Kysela int err = 0; 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds tu = file->private_data; 1610c1935b4dSJaroslav Kysela if (tu->timeri) { 16111da177e4SLinus Torvalds snd_timer_close(tu->timeri); 1612c1935b4dSJaroslav Kysela tu->timeri = NULL; 1613c1935b4dSJaroslav Kysela } 1614c1935b4dSJaroslav Kysela if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { 1615c1935b4dSJaroslav Kysela err = -EFAULT; 1616c1935b4dSJaroslav Kysela goto __err; 1617c1935b4dSJaroslav Kysela } 16181da177e4SLinus Torvalds sprintf(str, "application %i", current->pid); 16191da177e4SLinus Torvalds if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) 16201da177e4SLinus Torvalds tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; 16216b172a85SClemens Ladisch err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); 16226b172a85SClemens Ladisch if (err < 0) 1623c1935b4dSJaroslav Kysela goto __err; 16241da177e4SLinus Torvalds 16251da177e4SLinus Torvalds kfree(tu->queue); 16261da177e4SLinus Torvalds tu->queue = NULL; 16271da177e4SLinus Torvalds kfree(tu->tqueue); 16281da177e4SLinus Torvalds tu->tqueue = NULL; 16291da177e4SLinus Torvalds if (tu->tread) { 163053d2f744STakashi Iwai tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), 16316b172a85SClemens Ladisch GFP_KERNEL); 1632c1935b4dSJaroslav Kysela if (tu->tqueue == NULL) 1633c1935b4dSJaroslav Kysela err = -ENOMEM; 16341da177e4SLinus Torvalds } else { 163553d2f744STakashi Iwai tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), 16366b172a85SClemens Ladisch GFP_KERNEL); 1637c1935b4dSJaroslav Kysela if (tu->queue == NULL) 1638c1935b4dSJaroslav Kysela err = -ENOMEM; 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds 1641c1935b4dSJaroslav Kysela if (err < 0) { 1642c1935b4dSJaroslav Kysela snd_timer_close(tu->timeri); 1643c1935b4dSJaroslav Kysela tu->timeri = NULL; 1644c1935b4dSJaroslav Kysela } else { 16451da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; 16466b172a85SClemens Ladisch tu->timeri->callback = tu->tread 16476b172a85SClemens Ladisch ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; 16481da177e4SLinus Torvalds tu->timeri->ccallback = snd_timer_user_ccallback; 16491da177e4SLinus Torvalds tu->timeri->callback_data = (void *)tu; 165040ed9444STakashi Iwai tu->timeri->disconnect = snd_timer_user_disconnect; 1651c1935b4dSJaroslav Kysela } 1652c1935b4dSJaroslav Kysela 1653c1935b4dSJaroslav Kysela __err: 1654c1935b4dSJaroslav Kysela return err; 16551da177e4SLinus Torvalds } 16561da177e4SLinus Torvalds 16576b172a85SClemens Ladisch static int snd_timer_user_info(struct file *file, 165853d2f744STakashi Iwai struct snd_timer_info __user *_info) 16591da177e4SLinus Torvalds { 166053d2f744STakashi Iwai struct snd_timer_user *tu; 166153d2f744STakashi Iwai struct snd_timer_info *info; 166253d2f744STakashi Iwai struct snd_timer *t; 16631da177e4SLinus Torvalds int err = 0; 16641da177e4SLinus Torvalds 16651da177e4SLinus Torvalds tu = file->private_data; 16667c64ec34SClemens Ladisch if (!tu->timeri) 16677c64ec34SClemens Ladisch return -EBADFD; 16681da177e4SLinus Torvalds t = tu->timeri->timer; 16697c64ec34SClemens Ladisch if (!t) 16707c64ec34SClemens Ladisch return -EBADFD; 16711da177e4SLinus Torvalds 1672ca2c0966STakashi Iwai info = kzalloc(sizeof(*info), GFP_KERNEL); 16731da177e4SLinus Torvalds if (! info) 16741da177e4SLinus Torvalds return -ENOMEM; 16751da177e4SLinus Torvalds info->card = t->card ? t->card->number : -1; 16761da177e4SLinus Torvalds if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) 16771da177e4SLinus Torvalds info->flags |= SNDRV_TIMER_FLG_SLAVE; 16781da177e4SLinus Torvalds strlcpy(info->id, t->id, sizeof(info->id)); 16791da177e4SLinus Torvalds strlcpy(info->name, t->name, sizeof(info->name)); 16801da177e4SLinus Torvalds info->resolution = t->hw.resolution; 16811da177e4SLinus Torvalds if (copy_to_user(_info, info, sizeof(*_info))) 16821da177e4SLinus Torvalds err = -EFAULT; 16831da177e4SLinus Torvalds kfree(info); 16841da177e4SLinus Torvalds return err; 16851da177e4SLinus Torvalds } 16861da177e4SLinus Torvalds 16876b172a85SClemens Ladisch static int snd_timer_user_params(struct file *file, 168853d2f744STakashi Iwai struct snd_timer_params __user *_params) 16891da177e4SLinus Torvalds { 169053d2f744STakashi Iwai struct snd_timer_user *tu; 169153d2f744STakashi Iwai struct snd_timer_params params; 169253d2f744STakashi Iwai struct snd_timer *t; 169353d2f744STakashi Iwai struct snd_timer_read *tr; 169453d2f744STakashi Iwai struct snd_timer_tread *ttr; 16951da177e4SLinus Torvalds int err; 16961da177e4SLinus Torvalds 16971da177e4SLinus Torvalds tu = file->private_data; 16987c64ec34SClemens Ladisch if (!tu->timeri) 16997c64ec34SClemens Ladisch return -EBADFD; 17001da177e4SLinus Torvalds t = tu->timeri->timer; 17017c64ec34SClemens Ladisch if (!t) 17027c64ec34SClemens Ladisch return -EBADFD; 17031da177e4SLinus Torvalds if (copy_from_user(¶ms, _params, sizeof(params))) 17041da177e4SLinus Torvalds return -EFAULT; 1705*71321eb3STakashi Iwai if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { 1706*71321eb3STakashi Iwai u64 resolution; 1707*71321eb3STakashi Iwai 1708*71321eb3STakashi Iwai if (params.ticks < 1) { 17091da177e4SLinus Torvalds err = -EINVAL; 17101da177e4SLinus Torvalds goto _end; 17111da177e4SLinus Torvalds } 1712*71321eb3STakashi Iwai 1713*71321eb3STakashi Iwai /* Don't allow resolution less than 1ms */ 1714*71321eb3STakashi Iwai resolution = snd_timer_resolution(tu->timeri); 1715*71321eb3STakashi Iwai resolution *= params.ticks; 1716*71321eb3STakashi Iwai if (resolution < 1000000) { 1717*71321eb3STakashi Iwai err = -EINVAL; 1718*71321eb3STakashi Iwai goto _end; 1719*71321eb3STakashi Iwai } 1720*71321eb3STakashi Iwai } 17216b172a85SClemens Ladisch if (params.queue_size > 0 && 17226b172a85SClemens Ladisch (params.queue_size < 32 || params.queue_size > 1024)) { 17231da177e4SLinus Torvalds err = -EINVAL; 17241da177e4SLinus Torvalds goto _end; 17251da177e4SLinus Torvalds } 17261da177e4SLinus Torvalds if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| 17271da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_TICK)| 17281da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_START)| 17291da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_STOP)| 17301da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_CONTINUE)| 17311da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_PAUSE)| 1732a501dfa3SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_SUSPEND)| 1733a501dfa3SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_RESUME)| 17341da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_MSTART)| 17351da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_MSTOP)| 17361da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_MCONTINUE)| 173765d11d95SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_MPAUSE)| 173865d11d95SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_MSUSPEND)| 1739a501dfa3SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_MRESUME))) { 17401da177e4SLinus Torvalds err = -EINVAL; 17411da177e4SLinus Torvalds goto _end; 17421da177e4SLinus Torvalds } 17431da177e4SLinus Torvalds snd_timer_stop(tu->timeri); 17441da177e4SLinus Torvalds spin_lock_irq(&t->lock); 17451da177e4SLinus Torvalds tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| 17461da177e4SLinus Torvalds SNDRV_TIMER_IFLG_EXCLUSIVE| 17471da177e4SLinus Torvalds SNDRV_TIMER_IFLG_EARLY_EVENT); 17481da177e4SLinus Torvalds if (params.flags & SNDRV_TIMER_PSFLG_AUTO) 17491da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; 17501da177e4SLinus Torvalds if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) 17511da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; 17521da177e4SLinus Torvalds if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) 17531da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; 17541da177e4SLinus Torvalds spin_unlock_irq(&t->lock); 17556b172a85SClemens Ladisch if (params.queue_size > 0 && 17566b172a85SClemens Ladisch (unsigned int)tu->queue_size != params.queue_size) { 17571da177e4SLinus Torvalds if (tu->tread) { 17586b172a85SClemens Ladisch ttr = kmalloc(params.queue_size * sizeof(*ttr), 17596b172a85SClemens Ladisch GFP_KERNEL); 17601da177e4SLinus Torvalds if (ttr) { 17611da177e4SLinus Torvalds kfree(tu->tqueue); 17621da177e4SLinus Torvalds tu->queue_size = params.queue_size; 17631da177e4SLinus Torvalds tu->tqueue = ttr; 17641da177e4SLinus Torvalds } 17651da177e4SLinus Torvalds } else { 17666b172a85SClemens Ladisch tr = kmalloc(params.queue_size * sizeof(*tr), 17676b172a85SClemens Ladisch GFP_KERNEL); 17681da177e4SLinus Torvalds if (tr) { 17691da177e4SLinus Torvalds kfree(tu->queue); 17701da177e4SLinus Torvalds tu->queue_size = params.queue_size; 17711da177e4SLinus Torvalds tu->queue = tr; 17721da177e4SLinus Torvalds } 17731da177e4SLinus Torvalds } 17741da177e4SLinus Torvalds } 17751da177e4SLinus Torvalds tu->qhead = tu->qtail = tu->qused = 0; 17761da177e4SLinus Torvalds if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { 17771da177e4SLinus Torvalds if (tu->tread) { 177853d2f744STakashi Iwai struct snd_timer_tread tread; 1779cec8f96eSKangjie Lu memset(&tread, 0, sizeof(tread)); 17801da177e4SLinus Torvalds tread.event = SNDRV_TIMER_EVENT_EARLY; 17811da177e4SLinus Torvalds tread.tstamp.tv_sec = 0; 17821da177e4SLinus Torvalds tread.tstamp.tv_nsec = 0; 17831da177e4SLinus Torvalds tread.val = 0; 17841da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &tread); 17851da177e4SLinus Torvalds } else { 178653d2f744STakashi Iwai struct snd_timer_read *r = &tu->queue[0]; 17871da177e4SLinus Torvalds r->resolution = 0; 17881da177e4SLinus Torvalds r->ticks = 0; 17891da177e4SLinus Torvalds tu->qused++; 17901da177e4SLinus Torvalds tu->qtail++; 17911da177e4SLinus Torvalds } 17921da177e4SLinus Torvalds } 17931da177e4SLinus Torvalds tu->filter = params.filter; 17941da177e4SLinus Torvalds tu->ticks = params.ticks; 17951da177e4SLinus Torvalds err = 0; 17961da177e4SLinus Torvalds _end: 17971da177e4SLinus Torvalds if (copy_to_user(_params, ¶ms, sizeof(params))) 17981da177e4SLinus Torvalds return -EFAULT; 17991da177e4SLinus Torvalds return err; 18001da177e4SLinus Torvalds } 18011da177e4SLinus Torvalds 18026b172a85SClemens Ladisch static int snd_timer_user_status(struct file *file, 180353d2f744STakashi Iwai struct snd_timer_status __user *_status) 18041da177e4SLinus Torvalds { 180553d2f744STakashi Iwai struct snd_timer_user *tu; 180653d2f744STakashi Iwai struct snd_timer_status status; 18071da177e4SLinus Torvalds 18081da177e4SLinus Torvalds tu = file->private_data; 18097c64ec34SClemens Ladisch if (!tu->timeri) 18107c64ec34SClemens Ladisch return -EBADFD; 18111da177e4SLinus Torvalds memset(&status, 0, sizeof(status)); 18121da177e4SLinus Torvalds status.tstamp = tu->tstamp; 18131da177e4SLinus Torvalds status.resolution = snd_timer_resolution(tu->timeri); 18141da177e4SLinus Torvalds status.lost = tu->timeri->lost; 18151da177e4SLinus Torvalds status.overrun = tu->overrun; 18161da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 18171da177e4SLinus Torvalds status.queue = tu->qused; 18181da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 18191da177e4SLinus Torvalds if (copy_to_user(_status, &status, sizeof(status))) 18201da177e4SLinus Torvalds return -EFAULT; 18211da177e4SLinus Torvalds return 0; 18221da177e4SLinus Torvalds } 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds static int snd_timer_user_start(struct file *file) 18251da177e4SLinus Torvalds { 18261da177e4SLinus Torvalds int err; 182753d2f744STakashi Iwai struct snd_timer_user *tu; 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvalds tu = file->private_data; 18307c64ec34SClemens Ladisch if (!tu->timeri) 18317c64ec34SClemens Ladisch return -EBADFD; 18321da177e4SLinus Torvalds snd_timer_stop(tu->timeri); 18331da177e4SLinus Torvalds tu->timeri->lost = 0; 18341da177e4SLinus Torvalds tu->last_resolution = 0; 18351da177e4SLinus Torvalds return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds static int snd_timer_user_stop(struct file *file) 18391da177e4SLinus Torvalds { 18401da177e4SLinus Torvalds int err; 184153d2f744STakashi Iwai struct snd_timer_user *tu; 18421da177e4SLinus Torvalds 18431da177e4SLinus Torvalds tu = file->private_data; 18447c64ec34SClemens Ladisch if (!tu->timeri) 18457c64ec34SClemens Ladisch return -EBADFD; 18461da177e4SLinus Torvalds return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds static int snd_timer_user_continue(struct file *file) 18501da177e4SLinus Torvalds { 18511da177e4SLinus Torvalds int err; 185253d2f744STakashi Iwai struct snd_timer_user *tu; 18531da177e4SLinus Torvalds 18541da177e4SLinus Torvalds tu = file->private_data; 18557c64ec34SClemens Ladisch if (!tu->timeri) 18567c64ec34SClemens Ladisch return -EBADFD; 18579f8a7658STakashi Iwai /* start timer instead of continue if it's not used before */ 18589f8a7658STakashi Iwai if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) 18599f8a7658STakashi Iwai return snd_timer_user_start(file); 18601da177e4SLinus Torvalds tu->timeri->lost = 0; 18611da177e4SLinus Torvalds return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds 186415790a6bSTakashi Iwai static int snd_timer_user_pause(struct file *file) 186515790a6bSTakashi Iwai { 186615790a6bSTakashi Iwai int err; 186753d2f744STakashi Iwai struct snd_timer_user *tu; 186815790a6bSTakashi Iwai 186915790a6bSTakashi Iwai tu = file->private_data; 18707c64ec34SClemens Ladisch if (!tu->timeri) 18717c64ec34SClemens Ladisch return -EBADFD; 1872d138b445SJaroslav Kysela return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; 187315790a6bSTakashi Iwai } 187415790a6bSTakashi Iwai 18758c50b37cSTakashi Iwai enum { 18768c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), 18778c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), 18788c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), 18798c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), 18808c50b37cSTakashi Iwai }; 18818c50b37cSTakashi Iwai 1882af368027STakashi Iwai static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, 18836b172a85SClemens Ladisch unsigned long arg) 18841da177e4SLinus Torvalds { 188553d2f744STakashi Iwai struct snd_timer_user *tu; 18861da177e4SLinus Torvalds void __user *argp = (void __user *)arg; 18871da177e4SLinus Torvalds int __user *p = argp; 18881da177e4SLinus Torvalds 18891da177e4SLinus Torvalds tu = file->private_data; 18901da177e4SLinus Torvalds switch (cmd) { 18911da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_PVERSION: 18921da177e4SLinus Torvalds return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; 18931da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_NEXT_DEVICE: 18941da177e4SLinus Torvalds return snd_timer_user_next_device(argp); 18951da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_TREAD: 18961da177e4SLinus Torvalds { 18971da177e4SLinus Torvalds int xarg; 18981da177e4SLinus Torvalds 1899af368027STakashi Iwai if (tu->timeri) /* too late */ 19001da177e4SLinus Torvalds return -EBUSY; 1901af368027STakashi Iwai if (get_user(xarg, p)) 19021da177e4SLinus Torvalds return -EFAULT; 19031da177e4SLinus Torvalds tu->tread = xarg ? 1 : 0; 19041da177e4SLinus Torvalds return 0; 19051da177e4SLinus Torvalds } 19061da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_GINFO: 19071da177e4SLinus Torvalds return snd_timer_user_ginfo(file, argp); 19081da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_GPARAMS: 19091da177e4SLinus Torvalds return snd_timer_user_gparams(file, argp); 19101da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_GSTATUS: 19111da177e4SLinus Torvalds return snd_timer_user_gstatus(file, argp); 19121da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_SELECT: 19131da177e4SLinus Torvalds return snd_timer_user_tselect(file, argp); 19141da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_INFO: 19151da177e4SLinus Torvalds return snd_timer_user_info(file, argp); 19161da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_PARAMS: 19171da177e4SLinus Torvalds return snd_timer_user_params(file, argp); 19181da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_STATUS: 19191da177e4SLinus Torvalds return snd_timer_user_status(file, argp); 19201da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_START: 19218c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_START_OLD: 19221da177e4SLinus Torvalds return snd_timer_user_start(file); 19231da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_STOP: 19248c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_STOP_OLD: 19251da177e4SLinus Torvalds return snd_timer_user_stop(file); 19261da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_CONTINUE: 19278c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_CONTINUE_OLD: 19281da177e4SLinus Torvalds return snd_timer_user_continue(file); 192915790a6bSTakashi Iwai case SNDRV_TIMER_IOCTL_PAUSE: 19308c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_PAUSE_OLD: 193115790a6bSTakashi Iwai return snd_timer_user_pause(file); 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds return -ENOTTY; 19341da177e4SLinus Torvalds } 19351da177e4SLinus Torvalds 1936af368027STakashi Iwai static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, 1937af368027STakashi Iwai unsigned long arg) 1938af368027STakashi Iwai { 1939af368027STakashi Iwai struct snd_timer_user *tu = file->private_data; 1940af368027STakashi Iwai long ret; 1941af368027STakashi Iwai 1942af368027STakashi Iwai mutex_lock(&tu->ioctl_lock); 1943af368027STakashi Iwai ret = __snd_timer_user_ioctl(file, cmd, arg); 1944af368027STakashi Iwai mutex_unlock(&tu->ioctl_lock); 1945af368027STakashi Iwai return ret; 1946af368027STakashi Iwai } 1947af368027STakashi Iwai 19481da177e4SLinus Torvalds static int snd_timer_user_fasync(int fd, struct file * file, int on) 19491da177e4SLinus Torvalds { 195053d2f744STakashi Iwai struct snd_timer_user *tu; 19511da177e4SLinus Torvalds 19521da177e4SLinus Torvalds tu = file->private_data; 195360aa4924SJonathan Corbet return fasync_helper(fd, file, on, &tu->fasync); 19541da177e4SLinus Torvalds } 19551da177e4SLinus Torvalds 19566b172a85SClemens Ladisch static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, 19576b172a85SClemens Ladisch size_t count, loff_t *offset) 19581da177e4SLinus Torvalds { 195953d2f744STakashi Iwai struct snd_timer_user *tu; 19601da177e4SLinus Torvalds long result = 0, unit; 19614dff5c7bSTakashi Iwai int qhead; 19621da177e4SLinus Torvalds int err = 0; 19631da177e4SLinus Torvalds 19641da177e4SLinus Torvalds tu = file->private_data; 196553d2f744STakashi Iwai unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); 19661da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 19671da177e4SLinus Torvalds while ((long)count - result >= unit) { 19681da177e4SLinus Torvalds while (!tu->qused) { 19691da177e4SLinus Torvalds wait_queue_t wait; 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { 19721da177e4SLinus Torvalds err = -EAGAIN; 19734dff5c7bSTakashi Iwai goto _error; 19741da177e4SLinus Torvalds } 19751da177e4SLinus Torvalds 19761da177e4SLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 19771da177e4SLinus Torvalds init_waitqueue_entry(&wait, current); 19781da177e4SLinus Torvalds add_wait_queue(&tu->qchange_sleep, &wait); 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 19811da177e4SLinus Torvalds schedule(); 19821da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds remove_wait_queue(&tu->qchange_sleep, &wait); 19851da177e4SLinus Torvalds 1986230323daSTakashi Iwai if (tu->disconnected) { 1987230323daSTakashi Iwai err = -ENODEV; 19884dff5c7bSTakashi Iwai goto _error; 1989230323daSTakashi Iwai } 19901da177e4SLinus Torvalds if (signal_pending(current)) { 19911da177e4SLinus Torvalds err = -ERESTARTSYS; 19924dff5c7bSTakashi Iwai goto _error; 19931da177e4SLinus Torvalds } 19941da177e4SLinus Torvalds } 19951da177e4SLinus Torvalds 19964dff5c7bSTakashi Iwai qhead = tu->qhead++; 19974dff5c7bSTakashi Iwai tu->qhead %= tu->queue_size; 19983fa6993fSTakashi Iwai tu->qused--; 19991da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 20001da177e4SLinus Torvalds 200111749e08SVegard Nossum mutex_lock(&tu->ioctl_lock); 20021da177e4SLinus Torvalds if (tu->tread) { 20034dff5c7bSTakashi Iwai if (copy_to_user(buffer, &tu->tqueue[qhead], 20044dff5c7bSTakashi Iwai sizeof(struct snd_timer_tread))) 20051da177e4SLinus Torvalds err = -EFAULT; 20061da177e4SLinus Torvalds } else { 20074dff5c7bSTakashi Iwai if (copy_to_user(buffer, &tu->queue[qhead], 20084dff5c7bSTakashi Iwai sizeof(struct snd_timer_read))) 20091da177e4SLinus Torvalds err = -EFAULT; 20101da177e4SLinus Torvalds } 201111749e08SVegard Nossum mutex_unlock(&tu->ioctl_lock); 20121da177e4SLinus Torvalds 20131da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 20144dff5c7bSTakashi Iwai if (err < 0) 20154dff5c7bSTakashi Iwai goto _error; 20164dff5c7bSTakashi Iwai result += unit; 20174dff5c7bSTakashi Iwai buffer += unit; 20181da177e4SLinus Torvalds } 20191da177e4SLinus Torvalds _error: 20204dff5c7bSTakashi Iwai spin_unlock_irq(&tu->qlock); 20211da177e4SLinus Torvalds return result > 0 ? result : err; 20221da177e4SLinus Torvalds } 20231da177e4SLinus Torvalds 20241da177e4SLinus Torvalds static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) 20251da177e4SLinus Torvalds { 20261da177e4SLinus Torvalds unsigned int mask; 202753d2f744STakashi Iwai struct snd_timer_user *tu; 20281da177e4SLinus Torvalds 20291da177e4SLinus Torvalds tu = file->private_data; 20301da177e4SLinus Torvalds 20311da177e4SLinus Torvalds poll_wait(file, &tu->qchange_sleep, wait); 20321da177e4SLinus Torvalds 20331da177e4SLinus Torvalds mask = 0; 20341da177e4SLinus Torvalds if (tu->qused) 20351da177e4SLinus Torvalds mask |= POLLIN | POLLRDNORM; 2036230323daSTakashi Iwai if (tu->disconnected) 2037230323daSTakashi Iwai mask |= POLLERR; 20381da177e4SLinus Torvalds 20391da177e4SLinus Torvalds return mask; 20401da177e4SLinus Torvalds } 20411da177e4SLinus Torvalds 20421da177e4SLinus Torvalds #ifdef CONFIG_COMPAT 20431da177e4SLinus Torvalds #include "timer_compat.c" 20441da177e4SLinus Torvalds #else 20451da177e4SLinus Torvalds #define snd_timer_user_ioctl_compat NULL 20461da177e4SLinus Torvalds #endif 20471da177e4SLinus Torvalds 20489c2e08c5SArjan van de Ven static const struct file_operations snd_timer_f_ops = 20491da177e4SLinus Torvalds { 20501da177e4SLinus Torvalds .owner = THIS_MODULE, 20511da177e4SLinus Torvalds .read = snd_timer_user_read, 20521da177e4SLinus Torvalds .open = snd_timer_user_open, 20531da177e4SLinus Torvalds .release = snd_timer_user_release, 205402f4865fSTakashi Iwai .llseek = no_llseek, 20551da177e4SLinus Torvalds .poll = snd_timer_user_poll, 20561da177e4SLinus Torvalds .unlocked_ioctl = snd_timer_user_ioctl, 20571da177e4SLinus Torvalds .compat_ioctl = snd_timer_user_ioctl_compat, 20581da177e4SLinus Torvalds .fasync = snd_timer_user_fasync, 20591da177e4SLinus Torvalds }; 20601da177e4SLinus Torvalds 20617c35860dSTakashi Iwai /* unregister the system timer */ 20627c35860dSTakashi Iwai static void snd_timer_free_all(void) 20637c35860dSTakashi Iwai { 20647c35860dSTakashi Iwai struct snd_timer *timer, *n; 20657c35860dSTakashi Iwai 20667c35860dSTakashi Iwai list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) 20677c35860dSTakashi Iwai snd_timer_free(timer); 20687c35860dSTakashi Iwai } 20697c35860dSTakashi Iwai 207089da061fSTakashi Iwai static struct device timer_dev; 207189da061fSTakashi Iwai 20721da177e4SLinus Torvalds /* 20731da177e4SLinus Torvalds * ENTRY functions 20741da177e4SLinus Torvalds */ 20751da177e4SLinus Torvalds 20761da177e4SLinus Torvalds static int __init alsa_timer_init(void) 20771da177e4SLinus Torvalds { 20781da177e4SLinus Torvalds int err; 20791da177e4SLinus Torvalds 208089da061fSTakashi Iwai snd_device_initialize(&timer_dev, NULL); 208189da061fSTakashi Iwai dev_set_name(&timer_dev, "timer"); 208289da061fSTakashi Iwai 20831da177e4SLinus Torvalds #ifdef SNDRV_OSS_INFO_DEV_TIMERS 20846b172a85SClemens Ladisch snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, 20856b172a85SClemens Ladisch "system timer"); 20861da177e4SLinus Torvalds #endif 2087e28563ccSTakashi Iwai 20887c35860dSTakashi Iwai err = snd_timer_register_system(); 20897c35860dSTakashi Iwai if (err < 0) { 2090cf74dcf3STakashi Iwai pr_err("ALSA: unable to register system timer (%i)\n", err); 209189da061fSTakashi Iwai put_device(&timer_dev); 20927c35860dSTakashi Iwai return err; 20937c35860dSTakashi Iwai } 20947c35860dSTakashi Iwai 209540a4b263STakashi Iwai err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, 209640a4b263STakashi Iwai &snd_timer_f_ops, NULL, &timer_dev); 20977c35860dSTakashi Iwai if (err < 0) { 2098cf74dcf3STakashi Iwai pr_err("ALSA: unable to register timer device (%i)\n", err); 20997c35860dSTakashi Iwai snd_timer_free_all(); 210089da061fSTakashi Iwai put_device(&timer_dev); 21017c35860dSTakashi Iwai return err; 21027c35860dSTakashi Iwai } 21037c35860dSTakashi Iwai 2104e28563ccSTakashi Iwai snd_timer_proc_init(); 21051da177e4SLinus Torvalds return 0; 21061da177e4SLinus Torvalds } 21071da177e4SLinus Torvalds 21081da177e4SLinus Torvalds static void __exit alsa_timer_exit(void) 21091da177e4SLinus Torvalds { 211040a4b263STakashi Iwai snd_unregister_device(&timer_dev); 21117c35860dSTakashi Iwai snd_timer_free_all(); 211289da061fSTakashi Iwai put_device(&timer_dev); 2113e28563ccSTakashi Iwai snd_timer_proc_done(); 21141da177e4SLinus Torvalds #ifdef SNDRV_OSS_INFO_DEV_TIMERS 21151da177e4SLinus Torvalds snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); 21161da177e4SLinus Torvalds #endif 21171da177e4SLinus Torvalds } 21181da177e4SLinus Torvalds 21191da177e4SLinus Torvalds module_init(alsa_timer_init) 21201da177e4SLinus Torvalds module_exit(alsa_timer_exit) 21211da177e4SLinus Torvalds 21221da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_open); 21231da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_close); 21241da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_resolution); 21251da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_start); 21261da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_stop); 21271da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_continue); 21281da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_pause); 21291da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_new); 21301da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_notify); 21311da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_global_new); 21321da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_global_free); 21331da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_global_register); 21341da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_interrupt); 2135