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 388eeaa2f9STakashi Iwai #if IS_ENABLED(CONFIG_SND_HRTIMER) 39109fef9eSClemens Ladisch #define DEFAULT_TIMER_LIMIT 4 408eeaa2f9STakashi Iwai #elif IS_ENABLED(CONFIG_SND_RTCTIMER) 411da177e4SLinus Torvalds #define DEFAULT_TIMER_LIMIT 2 421da177e4SLinus Torvalds #else 431da177e4SLinus Torvalds #define DEFAULT_TIMER_LIMIT 1 441da177e4SLinus Torvalds #endif 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds static int timer_limit = DEFAULT_TIMER_LIMIT; 47b751eef1SJaroslav Kysela static int timer_tstamp_monotonic = 1; 48c1017a4cSJaroslav Kysela MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); 491da177e4SLinus Torvalds MODULE_DESCRIPTION("ALSA timer interface"); 501da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 511da177e4SLinus Torvalds module_param(timer_limit, int, 0444); 521da177e4SLinus Torvalds MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); 53b751eef1SJaroslav Kysela module_param(timer_tstamp_monotonic, int, 0444); 54b751eef1SJaroslav Kysela MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); 551da177e4SLinus Torvalds 5603cfe6f5SKay Sievers MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); 5703cfe6f5SKay Sievers MODULE_ALIAS("devname:snd/timer"); 5803cfe6f5SKay Sievers 5953d2f744STakashi Iwai struct snd_timer_user { 6053d2f744STakashi Iwai struct snd_timer_instance *timeri; 611da177e4SLinus Torvalds int tread; /* enhanced read with timestamps and events */ 621da177e4SLinus Torvalds unsigned long ticks; 631da177e4SLinus Torvalds unsigned long overrun; 641da177e4SLinus Torvalds int qhead; 651da177e4SLinus Torvalds int qtail; 661da177e4SLinus Torvalds int qused; 671da177e4SLinus Torvalds int queue_size; 6853d2f744STakashi Iwai struct snd_timer_read *queue; 6953d2f744STakashi Iwai struct snd_timer_tread *tqueue; 701da177e4SLinus Torvalds spinlock_t qlock; 711da177e4SLinus Torvalds unsigned long last_resolution; 721da177e4SLinus Torvalds unsigned int filter; 731da177e4SLinus Torvalds struct timespec tstamp; /* trigger tstamp */ 741da177e4SLinus Torvalds wait_queue_head_t qchange_sleep; 751da177e4SLinus Torvalds struct fasync_struct *fasync; 761a60d4c5SIngo Molnar struct mutex tread_sem; 7753d2f744STakashi Iwai }; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds /* list of timers */ 801da177e4SLinus Torvalds static LIST_HEAD(snd_timer_list); 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds /* list of slave instances */ 831da177e4SLinus Torvalds static LIST_HEAD(snd_timer_slave_list); 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* lock for slave active lists */ 861da177e4SLinus Torvalds static DEFINE_SPINLOCK(slave_active_lock); 871da177e4SLinus Torvalds 881a60d4c5SIngo Molnar static DEFINE_MUTEX(register_mutex); 891da177e4SLinus Torvalds 9053d2f744STakashi Iwai static int snd_timer_free(struct snd_timer *timer); 9153d2f744STakashi Iwai static int snd_timer_dev_free(struct snd_device *device); 9253d2f744STakashi Iwai static int snd_timer_dev_register(struct snd_device *device); 93c461482cSTakashi Iwai static int snd_timer_dev_disconnect(struct snd_device *device); 941da177e4SLinus Torvalds 9553d2f744STakashi Iwai static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds /* 981da177e4SLinus Torvalds * create a timer instance with the given owner string. 991da177e4SLinus Torvalds * when timer is not NULL, increments the module counter 1001da177e4SLinus Torvalds */ 10153d2f744STakashi Iwai static struct snd_timer_instance *snd_timer_instance_new(char *owner, 10253d2f744STakashi Iwai struct snd_timer *timer) 1031da177e4SLinus Torvalds { 10453d2f744STakashi Iwai struct snd_timer_instance *timeri; 105ca2c0966STakashi Iwai timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); 1061da177e4SLinus Torvalds if (timeri == NULL) 1071da177e4SLinus Torvalds return NULL; 108543537bdSPaulo Marques timeri->owner = kstrdup(owner, GFP_KERNEL); 1091da177e4SLinus Torvalds if (! timeri->owner) { 1101da177e4SLinus Torvalds kfree(timeri); 1111da177e4SLinus Torvalds return NULL; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->open_list); 1141da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->active_list); 1151da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->ack_list); 1161da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->slave_list_head); 1171da177e4SLinus Torvalds INIT_LIST_HEAD(&timeri->slave_active_head); 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds timeri->timer = timer; 120de24214dSClemens Ladisch if (timer && !try_module_get(timer->module)) { 1211da177e4SLinus Torvalds kfree(timeri->owner); 1221da177e4SLinus Torvalds kfree(timeri); 1231da177e4SLinus Torvalds return NULL; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds return timeri; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds /* 1301da177e4SLinus Torvalds * find a timer instance from the given timer id 1311da177e4SLinus Torvalds */ 13253d2f744STakashi Iwai static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) 1331da177e4SLinus Torvalds { 13453d2f744STakashi Iwai struct snd_timer *timer = NULL; 1351da177e4SLinus Torvalds 1369244b2c3SJohannes Berg list_for_each_entry(timer, &snd_timer_list, device_list) { 1371da177e4SLinus Torvalds if (timer->tmr_class != tid->dev_class) 1381da177e4SLinus Torvalds continue; 1391da177e4SLinus Torvalds if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || 1401da177e4SLinus Torvalds timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && 1411da177e4SLinus Torvalds (timer->card == NULL || 1421da177e4SLinus Torvalds timer->card->number != tid->card)) 1431da177e4SLinus Torvalds continue; 1441da177e4SLinus Torvalds if (timer->tmr_device != tid->device) 1451da177e4SLinus Torvalds continue; 1461da177e4SLinus Torvalds if (timer->tmr_subdevice != tid->subdevice) 1471da177e4SLinus Torvalds continue; 1481da177e4SLinus Torvalds return timer; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds return NULL; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 153ee2da997SJohannes Berg #ifdef CONFIG_MODULES 1541da177e4SLinus Torvalds 15553d2f744STakashi Iwai static void snd_timer_request(struct snd_timer_id *tid) 1561da177e4SLinus Torvalds { 1571da177e4SLinus Torvalds switch (tid->dev_class) { 1581da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_GLOBAL: 1591da177e4SLinus Torvalds if (tid->device < timer_limit) 1601da177e4SLinus Torvalds request_module("snd-timer-%i", tid->device); 1611da177e4SLinus Torvalds break; 1621da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_CARD: 1631da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_PCM: 1641da177e4SLinus Torvalds if (tid->card < snd_ecards_limit) 1651da177e4SLinus Torvalds request_module("snd-card-%i", tid->card); 1661da177e4SLinus Torvalds break; 1671da177e4SLinus Torvalds default: 1681da177e4SLinus Torvalds break; 1691da177e4SLinus Torvalds } 1701da177e4SLinus Torvalds } 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds #endif 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* 1751da177e4SLinus Torvalds * look for a master instance matching with the slave id of the given slave. 1761da177e4SLinus Torvalds * when found, relink the open_link of the slave. 1771da177e4SLinus Torvalds * 1781da177e4SLinus Torvalds * call this with register_mutex down. 1791da177e4SLinus Torvalds */ 18053d2f744STakashi Iwai static void snd_timer_check_slave(struct snd_timer_instance *slave) 1811da177e4SLinus Torvalds { 18253d2f744STakashi Iwai struct snd_timer *timer; 18353d2f744STakashi Iwai struct snd_timer_instance *master; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* FIXME: it's really dumb to look up all entries.. */ 1869244b2c3SJohannes Berg list_for_each_entry(timer, &snd_timer_list, device_list) { 1879244b2c3SJohannes Berg list_for_each_entry(master, &timer->open_list_head, open_list) { 1881da177e4SLinus Torvalds if (slave->slave_class == master->slave_class && 1891da177e4SLinus Torvalds slave->slave_id == master->slave_id) { 1905b7c757dSNicolas Kaiser list_move_tail(&slave->open_list, 1916b172a85SClemens Ladisch &master->slave_list_head); 1921da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 1931da177e4SLinus Torvalds slave->master = master; 1941da177e4SLinus Torvalds slave->timer = master->timer; 1951da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 1961da177e4SLinus Torvalds return; 1971da177e4SLinus Torvalds } 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds /* 2031da177e4SLinus Torvalds * look for slave instances matching with the slave id of the given master. 2041da177e4SLinus Torvalds * when found, relink the open_link of slaves. 2051da177e4SLinus Torvalds * 2061da177e4SLinus Torvalds * call this with register_mutex down. 2071da177e4SLinus Torvalds */ 20853d2f744STakashi Iwai static void snd_timer_check_master(struct snd_timer_instance *master) 2091da177e4SLinus Torvalds { 2109244b2c3SJohannes Berg struct snd_timer_instance *slave, *tmp; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds /* check all pending slaves */ 2139244b2c3SJohannes Berg list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { 2141da177e4SLinus Torvalds if (slave->slave_class == master->slave_class && 2151da177e4SLinus Torvalds slave->slave_id == master->slave_id) { 2169244b2c3SJohannes Berg list_move_tail(&slave->open_list, &master->slave_list_head); 2171da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 2181da177e4SLinus Torvalds slave->master = master; 2191da177e4SLinus Torvalds slave->timer = master->timer; 2201da177e4SLinus Torvalds if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) 2216b172a85SClemens Ladisch list_add_tail(&slave->active_list, 2226b172a85SClemens Ladisch &master->slave_active_head); 2231da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds } 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds /* 2291da177e4SLinus Torvalds * open a timer instance 2301da177e4SLinus Torvalds * when opening a master, the slave id must be here given. 2311da177e4SLinus Torvalds */ 23253d2f744STakashi Iwai int snd_timer_open(struct snd_timer_instance **ti, 23353d2f744STakashi Iwai char *owner, struct snd_timer_id *tid, 2341da177e4SLinus Torvalds unsigned int slave_id) 2351da177e4SLinus Torvalds { 23653d2f744STakashi Iwai struct snd_timer *timer; 23753d2f744STakashi Iwai struct snd_timer_instance *timeri = NULL; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { 2401da177e4SLinus Torvalds /* open a slave instance */ 2411da177e4SLinus Torvalds if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || 2421da177e4SLinus Torvalds tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { 2431da177e4SLinus Torvalds snd_printd("invalid slave class %i\n", tid->dev_sclass); 2441da177e4SLinus Torvalds return -EINVAL; 2451da177e4SLinus Torvalds } 2461a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 2471da177e4SLinus Torvalds timeri = snd_timer_instance_new(owner, NULL); 2482fd43d11SClemens Ladisch if (!timeri) { 2491a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2502fd43d11SClemens Ladisch return -ENOMEM; 2512fd43d11SClemens Ladisch } 2521da177e4SLinus Torvalds timeri->slave_class = tid->dev_sclass; 2531da177e4SLinus Torvalds timeri->slave_id = tid->device; 2541da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; 2551da177e4SLinus Torvalds list_add_tail(&timeri->open_list, &snd_timer_slave_list); 2561da177e4SLinus Torvalds snd_timer_check_slave(timeri); 2571a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2581da177e4SLinus Torvalds *ti = timeri; 2591da177e4SLinus Torvalds return 0; 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds /* open a master instance */ 2631a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 2641da177e4SLinus Torvalds timer = snd_timer_find(tid); 265ee2da997SJohannes Berg #ifdef CONFIG_MODULES 266ee2da997SJohannes Berg if (!timer) { 2671a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2681da177e4SLinus Torvalds snd_timer_request(tid); 2691a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 2701da177e4SLinus Torvalds timer = snd_timer_find(tid); 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds #endif 2732fd43d11SClemens Ladisch if (!timer) { 2741a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2752fd43d11SClemens Ladisch return -ENODEV; 2762fd43d11SClemens Ladisch } 2771da177e4SLinus Torvalds if (!list_empty(&timer->open_list_head)) { 2782fd43d11SClemens Ladisch timeri = list_entry(timer->open_list_head.next, 27953d2f744STakashi Iwai struct snd_timer_instance, open_list); 2801da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { 2811a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2821da177e4SLinus Torvalds return -EBUSY; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds timeri = snd_timer_instance_new(owner, timer); 2862fd43d11SClemens Ladisch if (!timeri) { 2871a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2882fd43d11SClemens Ladisch return -ENOMEM; 2892fd43d11SClemens Ladisch } 2901da177e4SLinus Torvalds timeri->slave_class = tid->dev_sclass; 2911da177e4SLinus Torvalds timeri->slave_id = slave_id; 2921da177e4SLinus Torvalds if (list_empty(&timer->open_list_head) && timer->hw.open) 2931da177e4SLinus Torvalds timer->hw.open(timer); 2941da177e4SLinus Torvalds list_add_tail(&timeri->open_list, &timer->open_list_head); 2951da177e4SLinus Torvalds snd_timer_check_master(timeri); 2961a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 2971da177e4SLinus Torvalds *ti = timeri; 2981da177e4SLinus Torvalds return 0; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 30153d2f744STakashi Iwai static int _snd_timer_stop(struct snd_timer_instance *timeri, 30253d2f744STakashi Iwai int keep_flag, int event); 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds /* 3051da177e4SLinus Torvalds * close a timer instance 3061da177e4SLinus Torvalds */ 30753d2f744STakashi Iwai int snd_timer_close(struct snd_timer_instance *timeri) 3081da177e4SLinus Torvalds { 30953d2f744STakashi Iwai struct snd_timer *timer = NULL; 3109244b2c3SJohannes Berg struct snd_timer_instance *slave, *tmp; 3111da177e4SLinus Torvalds 3120072889aSTakashi Iwai if (snd_BUG_ON(!timeri)) 3137eaa943cSTakashi Iwai return -ENXIO; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds /* force to stop the timer */ 3161da177e4SLinus Torvalds snd_timer_stop(timeri); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { 3191da177e4SLinus Torvalds /* wait, until the active callback is finished */ 3201da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 3211da177e4SLinus Torvalds while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { 3221da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 3231da177e4SLinus Torvalds udelay(10); 3241da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 3271a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 3281da177e4SLinus Torvalds list_del(&timeri->open_list); 3291a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 3301da177e4SLinus Torvalds } else { 3311da177e4SLinus Torvalds timer = timeri->timer; 33294094c8aSTakashi Iwai if (snd_BUG_ON(!timer)) 33394094c8aSTakashi Iwai goto out; 3341da177e4SLinus Torvalds /* wait, until the active callback is finished */ 3351da177e4SLinus Torvalds spin_lock_irq(&timer->lock); 3361da177e4SLinus Torvalds while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { 3371da177e4SLinus Torvalds spin_unlock_irq(&timer->lock); 3381da177e4SLinus Torvalds udelay(10); 3391da177e4SLinus Torvalds spin_lock_irq(&timer->lock); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds spin_unlock_irq(&timer->lock); 3421a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 3431da177e4SLinus Torvalds list_del(&timeri->open_list); 3446b172a85SClemens Ladisch if (timer && list_empty(&timer->open_list_head) && 3456b172a85SClemens Ladisch timer->hw.close) 3461da177e4SLinus Torvalds timer->hw.close(timer); 3471da177e4SLinus Torvalds /* remove slave links */ 3489244b2c3SJohannes Berg list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, 3499244b2c3SJohannes Berg open_list) { 3501da177e4SLinus Torvalds spin_lock_irq(&slave_active_lock); 3511da177e4SLinus Torvalds _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION); 3529244b2c3SJohannes Berg list_move_tail(&slave->open_list, &snd_timer_slave_list); 3531da177e4SLinus Torvalds slave->master = NULL; 3541da177e4SLinus Torvalds slave->timer = NULL; 3551da177e4SLinus Torvalds spin_unlock_irq(&slave_active_lock); 3561da177e4SLinus Torvalds } 3571a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 3581da177e4SLinus Torvalds } 35994094c8aSTakashi Iwai out: 3601da177e4SLinus Torvalds if (timeri->private_free) 3611da177e4SLinus Torvalds timeri->private_free(timeri); 3621da177e4SLinus Torvalds kfree(timeri->owner); 3631da177e4SLinus Torvalds kfree(timeri); 364de24214dSClemens Ladisch if (timer) 365de24214dSClemens Ladisch module_put(timer->module); 3661da177e4SLinus Torvalds return 0; 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 36953d2f744STakashi Iwai unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) 3701da177e4SLinus Torvalds { 37153d2f744STakashi Iwai struct snd_timer * timer; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds if (timeri == NULL) 3741da177e4SLinus Torvalds return 0; 3751da177e4SLinus Torvalds if ((timer = timeri->timer) != NULL) { 3761da177e4SLinus Torvalds if (timer->hw.c_resolution) 3771da177e4SLinus Torvalds return timer->hw.c_resolution(timer); 3781da177e4SLinus Torvalds return timer->hw.resolution; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds return 0; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 38353d2f744STakashi Iwai static void snd_timer_notify1(struct snd_timer_instance *ti, int event) 3841da177e4SLinus Torvalds { 38553d2f744STakashi Iwai struct snd_timer *timer; 3861da177e4SLinus Torvalds unsigned long flags; 3871da177e4SLinus Torvalds unsigned long resolution = 0; 38853d2f744STakashi Iwai struct snd_timer_instance *ts; 3891da177e4SLinus Torvalds struct timespec tstamp; 3901da177e4SLinus Torvalds 391b751eef1SJaroslav Kysela if (timer_tstamp_monotonic) 392b751eef1SJaroslav Kysela do_posix_clock_monotonic_gettime(&tstamp); 393b751eef1SJaroslav Kysela else 39407799e75STakashi Iwai getnstimeofday(&tstamp); 3957eaa943cSTakashi Iwai if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || 3967eaa943cSTakashi Iwai event > SNDRV_TIMER_EVENT_PAUSE)) 3977eaa943cSTakashi Iwai return; 3986b172a85SClemens Ladisch if (event == SNDRV_TIMER_EVENT_START || 3996b172a85SClemens Ladisch event == SNDRV_TIMER_EVENT_CONTINUE) 4001da177e4SLinus Torvalds resolution = snd_timer_resolution(ti); 4011da177e4SLinus Torvalds if (ti->ccallback) 402b30477d5SJaroslav Kysela ti->ccallback(ti, event, &tstamp, resolution); 4031da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) 4041da177e4SLinus Torvalds return; 4051da177e4SLinus Torvalds timer = ti->timer; 4061da177e4SLinus Torvalds if (timer == NULL) 4071da177e4SLinus Torvalds return; 4081da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) 4091da177e4SLinus Torvalds return; 4101da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 4119244b2c3SJohannes Berg list_for_each_entry(ts, &ti->slave_active_head, active_list) 4121da177e4SLinus Torvalds if (ts->ccallback) 4131da177e4SLinus Torvalds ts->ccallback(ti, event + 100, &tstamp, resolution); 4141da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 41753d2f744STakashi Iwai static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, 4186b172a85SClemens Ladisch unsigned long sticks) 4191da177e4SLinus Torvalds { 4205b7c757dSNicolas Kaiser list_move_tail(&timeri->active_list, &timer->active_list_head); 4211da177e4SLinus Torvalds if (timer->running) { 4221da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) 4231da177e4SLinus Torvalds goto __start_now; 4241da177e4SLinus Torvalds timer->flags |= SNDRV_TIMER_FLG_RESCHED; 4251da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_START; 4261da177e4SLinus Torvalds return 1; /* delayed start */ 4271da177e4SLinus Torvalds } else { 4281da177e4SLinus Torvalds timer->sticks = sticks; 4291da177e4SLinus Torvalds timer->hw.start(timer); 4301da177e4SLinus Torvalds __start_now: 4311da177e4SLinus Torvalds timer->running++; 4321da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; 4331da177e4SLinus Torvalds return 0; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds 43753d2f744STakashi Iwai static int snd_timer_start_slave(struct snd_timer_instance *timeri) 4381da177e4SLinus Torvalds { 4391da177e4SLinus Torvalds unsigned long flags; 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds spin_lock_irqsave(&slave_active_lock, flags); 4421da177e4SLinus Torvalds timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; 4431da177e4SLinus Torvalds if (timeri->master) 4446b172a85SClemens Ladisch list_add_tail(&timeri->active_list, 4456b172a85SClemens Ladisch &timeri->master->slave_active_head); 4461da177e4SLinus Torvalds spin_unlock_irqrestore(&slave_active_lock, flags); 4471da177e4SLinus Torvalds return 1; /* delayed start */ 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds /* 4511da177e4SLinus Torvalds * start the timer instance 4521da177e4SLinus Torvalds */ 45353d2f744STakashi Iwai int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) 4541da177e4SLinus Torvalds { 45553d2f744STakashi Iwai struct snd_timer *timer; 4561da177e4SLinus Torvalds int result = -EINVAL; 4571da177e4SLinus Torvalds unsigned long flags; 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds if (timeri == NULL || ticks < 1) 4601da177e4SLinus Torvalds return -EINVAL; 4611da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { 4621da177e4SLinus Torvalds result = snd_timer_start_slave(timeri); 4631da177e4SLinus Torvalds snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); 4641da177e4SLinus Torvalds return result; 4651da177e4SLinus Torvalds } 4661da177e4SLinus Torvalds timer = timeri->timer; 4671da177e4SLinus Torvalds if (timer == NULL) 4681da177e4SLinus Torvalds return -EINVAL; 4691da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 4701da177e4SLinus Torvalds timeri->ticks = timeri->cticks = ticks; 4711da177e4SLinus Torvalds timeri->pticks = 0; 4721da177e4SLinus Torvalds result = snd_timer_start1(timer, timeri, ticks); 4731da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 4741da177e4SLinus Torvalds snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); 4751da177e4SLinus Torvalds return result; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds 47853d2f744STakashi Iwai static int _snd_timer_stop(struct snd_timer_instance * timeri, 47953d2f744STakashi Iwai int keep_flag, int event) 4801da177e4SLinus Torvalds { 48153d2f744STakashi Iwai struct snd_timer *timer; 4821da177e4SLinus Torvalds unsigned long flags; 4831da177e4SLinus Torvalds 4847eaa943cSTakashi Iwai if (snd_BUG_ON(!timeri)) 4857eaa943cSTakashi Iwai return -ENXIO; 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { 4881da177e4SLinus Torvalds if (!keep_flag) { 4891da177e4SLinus Torvalds spin_lock_irqsave(&slave_active_lock, flags); 4901da177e4SLinus Torvalds timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; 4911da177e4SLinus Torvalds spin_unlock_irqrestore(&slave_active_lock, flags); 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds goto __end; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds timer = timeri->timer; 4961da177e4SLinus Torvalds if (!timer) 4971da177e4SLinus Torvalds return -EINVAL; 4981da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 4991da177e4SLinus Torvalds list_del_init(&timeri->ack_list); 5001da177e4SLinus Torvalds list_del_init(&timeri->active_list); 5011da177e4SLinus Torvalds if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && 5021da177e4SLinus Torvalds !(--timer->running)) { 5031da177e4SLinus Torvalds timer->hw.stop(timer); 5041da177e4SLinus Torvalds if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { 5051da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; 5061da177e4SLinus Torvalds snd_timer_reschedule(timer, 0); 5071da177e4SLinus Torvalds if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { 5081da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; 5091da177e4SLinus Torvalds timer->hw.start(timer); 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds } 5131da177e4SLinus Torvalds if (!keep_flag) 5146b172a85SClemens Ladisch timeri->flags &= 5156b172a85SClemens Ladisch ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); 5161da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 5171da177e4SLinus Torvalds __end: 5181da177e4SLinus Torvalds if (event != SNDRV_TIMER_EVENT_RESOLUTION) 5191da177e4SLinus Torvalds snd_timer_notify1(timeri, event); 5201da177e4SLinus Torvalds return 0; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds /* 5241da177e4SLinus Torvalds * stop the timer instance. 5251da177e4SLinus Torvalds * 5261da177e4SLinus Torvalds * do not call this from the timer callback! 5271da177e4SLinus Torvalds */ 52853d2f744STakashi Iwai int snd_timer_stop(struct snd_timer_instance *timeri) 5291da177e4SLinus Torvalds { 53053d2f744STakashi Iwai struct snd_timer *timer; 5311da177e4SLinus Torvalds unsigned long flags; 5321da177e4SLinus Torvalds int err; 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP); 5351da177e4SLinus Torvalds if (err < 0) 5361da177e4SLinus Torvalds return err; 5371da177e4SLinus Torvalds timer = timeri->timer; 5380584ffa5STakashi Iwai if (!timer) 5390584ffa5STakashi Iwai return -EINVAL; 5401da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 5411da177e4SLinus Torvalds timeri->cticks = timeri->ticks; 5421da177e4SLinus Torvalds timeri->pticks = 0; 5431da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 5441da177e4SLinus Torvalds return 0; 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds /* 5481da177e4SLinus Torvalds * start again.. the tick is kept. 5491da177e4SLinus Torvalds */ 55053d2f744STakashi Iwai int snd_timer_continue(struct snd_timer_instance *timeri) 5511da177e4SLinus Torvalds { 55253d2f744STakashi Iwai struct snd_timer *timer; 5531da177e4SLinus Torvalds int result = -EINVAL; 5541da177e4SLinus Torvalds unsigned long flags; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds if (timeri == NULL) 5571da177e4SLinus Torvalds return result; 5581da177e4SLinus Torvalds if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) 5591da177e4SLinus Torvalds return snd_timer_start_slave(timeri); 5601da177e4SLinus Torvalds timer = timeri->timer; 5611da177e4SLinus Torvalds if (! timer) 5621da177e4SLinus Torvalds return -EINVAL; 5631da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 5641da177e4SLinus Torvalds if (!timeri->cticks) 5651da177e4SLinus Torvalds timeri->cticks = 1; 5661da177e4SLinus Torvalds timeri->pticks = 0; 5671da177e4SLinus Torvalds result = snd_timer_start1(timer, timeri, timer->sticks); 5681da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 5691da177e4SLinus Torvalds snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); 5701da177e4SLinus Torvalds return result; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds /* 5741da177e4SLinus Torvalds * pause.. remember the ticks left 5751da177e4SLinus Torvalds */ 57653d2f744STakashi Iwai int snd_timer_pause(struct snd_timer_instance * timeri) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE); 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds /* 5821da177e4SLinus Torvalds * reschedule the timer 5831da177e4SLinus Torvalds * 5841da177e4SLinus Torvalds * start pending instances and check the scheduling ticks. 5851da177e4SLinus Torvalds * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. 5861da177e4SLinus Torvalds */ 58753d2f744STakashi Iwai static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) 5881da177e4SLinus Torvalds { 58953d2f744STakashi Iwai struct snd_timer_instance *ti; 5901da177e4SLinus Torvalds unsigned long ticks = ~0UL; 5911da177e4SLinus Torvalds 5929244b2c3SJohannes Berg list_for_each_entry(ti, &timer->active_list_head, active_list) { 5931da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_START) { 5941da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_START; 5951da177e4SLinus Torvalds ti->flags |= SNDRV_TIMER_IFLG_RUNNING; 5961da177e4SLinus Torvalds timer->running++; 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { 5991da177e4SLinus Torvalds if (ticks > ti->cticks) 6001da177e4SLinus Torvalds ticks = ti->cticks; 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds if (ticks == ~0UL) { 6041da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; 6051da177e4SLinus Torvalds return; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds if (ticks > timer->hw.ticks) 6081da177e4SLinus Torvalds ticks = timer->hw.ticks; 6091da177e4SLinus Torvalds if (ticks_left != ticks) 6101da177e4SLinus Torvalds timer->flags |= SNDRV_TIMER_FLG_CHANGE; 6111da177e4SLinus Torvalds timer->sticks = ticks; 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds /* 6151da177e4SLinus Torvalds * timer tasklet 6161da177e4SLinus Torvalds * 6171da177e4SLinus Torvalds */ 6181da177e4SLinus Torvalds static void snd_timer_tasklet(unsigned long arg) 6191da177e4SLinus Torvalds { 62053d2f744STakashi Iwai struct snd_timer *timer = (struct snd_timer *) arg; 62153d2f744STakashi Iwai struct snd_timer_instance *ti; 6221da177e4SLinus Torvalds struct list_head *p; 6231da177e4SLinus Torvalds unsigned long resolution, ticks; 6242999ff5bSTakashi Iwai unsigned long flags; 6251da177e4SLinus Torvalds 6262999ff5bSTakashi Iwai spin_lock_irqsave(&timer->lock, flags); 6271da177e4SLinus Torvalds /* now process all callbacks */ 6281da177e4SLinus Torvalds while (!list_empty(&timer->sack_list_head)) { 6291da177e4SLinus Torvalds p = timer->sack_list_head.next; /* get first item */ 63053d2f744STakashi Iwai ti = list_entry(p, struct snd_timer_instance, ack_list); 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds /* remove from ack_list and make empty */ 6331da177e4SLinus Torvalds list_del_init(p); 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds ticks = ti->pticks; 6361da177e4SLinus Torvalds ti->pticks = 0; 6371da177e4SLinus Torvalds resolution = ti->resolution; 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; 6401da177e4SLinus Torvalds spin_unlock(&timer->lock); 6411da177e4SLinus Torvalds if (ti->callback) 6421da177e4SLinus Torvalds ti->callback(ti, resolution, ticks); 6431da177e4SLinus Torvalds spin_lock(&timer->lock); 6441da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; 6451da177e4SLinus Torvalds } 6462999ff5bSTakashi Iwai spin_unlock_irqrestore(&timer->lock, flags); 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds /* 6501da177e4SLinus Torvalds * timer interrupt 6511da177e4SLinus Torvalds * 6521da177e4SLinus Torvalds * ticks_left is usually equal to timer->sticks. 6531da177e4SLinus Torvalds * 6541da177e4SLinus Torvalds */ 65553d2f744STakashi Iwai void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) 6561da177e4SLinus Torvalds { 6579244b2c3SJohannes Berg struct snd_timer_instance *ti, *ts, *tmp; 6581da177e4SLinus Torvalds unsigned long resolution, ticks; 6599244b2c3SJohannes Berg struct list_head *p, *ack_list_head; 660b32425acSTakashi Iwai unsigned long flags; 6611da177e4SLinus Torvalds int use_tasklet = 0; 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds if (timer == NULL) 6641da177e4SLinus Torvalds return; 6651da177e4SLinus Torvalds 666b32425acSTakashi Iwai spin_lock_irqsave(&timer->lock, flags); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /* remember the current resolution */ 6691da177e4SLinus Torvalds if (timer->hw.c_resolution) 6701da177e4SLinus Torvalds resolution = timer->hw.c_resolution(timer); 6711da177e4SLinus Torvalds else 6721da177e4SLinus Torvalds resolution = timer->hw.resolution; 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds /* loop for all active instances 6759244b2c3SJohannes Berg * Here we cannot use list_for_each_entry because the active_list of a 6766b172a85SClemens Ladisch * processed instance is relinked to done_list_head before the callback 6776b172a85SClemens Ladisch * is called. 6781da177e4SLinus Torvalds */ 6799244b2c3SJohannes Berg list_for_each_entry_safe(ti, tmp, &timer->active_list_head, 6809244b2c3SJohannes Berg active_list) { 6811da177e4SLinus Torvalds if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) 6821da177e4SLinus Torvalds continue; 6831da177e4SLinus Torvalds ti->pticks += ticks_left; 6841da177e4SLinus Torvalds ti->resolution = resolution; 6851da177e4SLinus Torvalds if (ti->cticks < ticks_left) 6861da177e4SLinus Torvalds ti->cticks = 0; 6871da177e4SLinus Torvalds else 6881da177e4SLinus Torvalds ti->cticks -= ticks_left; 6891da177e4SLinus Torvalds if (ti->cticks) /* not expired */ 6901da177e4SLinus Torvalds continue; 6911da177e4SLinus Torvalds if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { 6921da177e4SLinus Torvalds ti->cticks = ti->ticks; 6931da177e4SLinus Torvalds } else { 6941da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; 6951da177e4SLinus Torvalds if (--timer->running) 6969244b2c3SJohannes Berg list_del(&ti->active_list); 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || 6996b172a85SClemens Ladisch (ti->flags & SNDRV_TIMER_IFLG_FAST)) 7006b172a85SClemens Ladisch ack_list_head = &timer->ack_list_head; 7016b172a85SClemens Ladisch else 7026b172a85SClemens Ladisch ack_list_head = &timer->sack_list_head; 7036b172a85SClemens Ladisch if (list_empty(&ti->ack_list)) 7046b172a85SClemens Ladisch list_add_tail(&ti->ack_list, ack_list_head); 7059244b2c3SJohannes Berg list_for_each_entry(ts, &ti->slave_active_head, active_list) { 7061da177e4SLinus Torvalds ts->pticks = ti->pticks; 7071da177e4SLinus Torvalds ts->resolution = resolution; 7086b172a85SClemens Ladisch if (list_empty(&ts->ack_list)) 7096b172a85SClemens Ladisch list_add_tail(&ts->ack_list, ack_list_head); 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds if (timer->flags & SNDRV_TIMER_FLG_RESCHED) 713cd93fe47SClemens Ladisch snd_timer_reschedule(timer, timer->sticks); 7141da177e4SLinus Torvalds if (timer->running) { 7151da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { 7161da177e4SLinus Torvalds timer->hw.stop(timer); 7171da177e4SLinus Torvalds timer->flags |= SNDRV_TIMER_FLG_CHANGE; 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || 7201da177e4SLinus Torvalds (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { 7211da177e4SLinus Torvalds /* restart timer */ 7221da177e4SLinus Torvalds timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; 7231da177e4SLinus Torvalds timer->hw.start(timer); 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds } else { 7261da177e4SLinus Torvalds timer->hw.stop(timer); 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds /* now process all fast callbacks */ 7301da177e4SLinus Torvalds while (!list_empty(&timer->ack_list_head)) { 7311da177e4SLinus Torvalds p = timer->ack_list_head.next; /* get first item */ 73253d2f744STakashi Iwai ti = list_entry(p, struct snd_timer_instance, ack_list); 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds /* remove from ack_list and make empty */ 7351da177e4SLinus Torvalds list_del_init(p); 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds ticks = ti->pticks; 7381da177e4SLinus Torvalds ti->pticks = 0; 7391da177e4SLinus Torvalds 7401da177e4SLinus Torvalds ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; 7411da177e4SLinus Torvalds spin_unlock(&timer->lock); 7421da177e4SLinus Torvalds if (ti->callback) 7431da177e4SLinus Torvalds ti->callback(ti, resolution, ticks); 7441da177e4SLinus Torvalds spin_lock(&timer->lock); 7451da177e4SLinus Torvalds ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds /* do we have any slow callbacks? */ 7491da177e4SLinus Torvalds use_tasklet = !list_empty(&timer->sack_list_head); 750b32425acSTakashi Iwai spin_unlock_irqrestore(&timer->lock, flags); 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds if (use_tasklet) 7531f04128aSTakashi Iwai tasklet_schedule(&timer->task_queue); 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds /* 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds */ 7591da177e4SLinus Torvalds 76053d2f744STakashi Iwai int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, 76153d2f744STakashi Iwai struct snd_timer **rtimer) 7621da177e4SLinus Torvalds { 76353d2f744STakashi Iwai struct snd_timer *timer; 7641da177e4SLinus Torvalds int err; 76553d2f744STakashi Iwai static struct snd_device_ops ops = { 7661da177e4SLinus Torvalds .dev_free = snd_timer_dev_free, 7671da177e4SLinus Torvalds .dev_register = snd_timer_dev_register, 768c461482cSTakashi Iwai .dev_disconnect = snd_timer_dev_disconnect, 7691da177e4SLinus Torvalds }; 7701da177e4SLinus Torvalds 7717eaa943cSTakashi Iwai if (snd_BUG_ON(!tid)) 7727eaa943cSTakashi Iwai return -EINVAL; 7737eaa943cSTakashi Iwai if (rtimer) 7741da177e4SLinus Torvalds *rtimer = NULL; 775ca2c0966STakashi Iwai timer = kzalloc(sizeof(*timer), GFP_KERNEL); 77673e77ba0STakashi Iwai if (timer == NULL) { 77773e77ba0STakashi Iwai snd_printk(KERN_ERR "timer: cannot allocate\n"); 7781da177e4SLinus Torvalds return -ENOMEM; 77973e77ba0STakashi Iwai } 7801da177e4SLinus Torvalds timer->tmr_class = tid->dev_class; 7811da177e4SLinus Torvalds timer->card = card; 7821da177e4SLinus Torvalds timer->tmr_device = tid->device; 7831da177e4SLinus Torvalds timer->tmr_subdevice = tid->subdevice; 7841da177e4SLinus Torvalds if (id) 7851da177e4SLinus Torvalds strlcpy(timer->id, id, sizeof(timer->id)); 7861da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->device_list); 7871da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->open_list_head); 7881da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->active_list_head); 7891da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->ack_list_head); 7901da177e4SLinus Torvalds INIT_LIST_HEAD(&timer->sack_list_head); 7911da177e4SLinus Torvalds spin_lock_init(&timer->lock); 7926b172a85SClemens Ladisch tasklet_init(&timer->task_queue, snd_timer_tasklet, 7936b172a85SClemens Ladisch (unsigned long)timer); 7941da177e4SLinus Torvalds if (card != NULL) { 795de24214dSClemens Ladisch timer->module = card->module; 7966b172a85SClemens Ladisch err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); 7976b172a85SClemens Ladisch if (err < 0) { 7981da177e4SLinus Torvalds snd_timer_free(timer); 7991da177e4SLinus Torvalds return err; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds } 8027eaa943cSTakashi Iwai if (rtimer) 8031da177e4SLinus Torvalds *rtimer = timer; 8041da177e4SLinus Torvalds return 0; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 80753d2f744STakashi Iwai static int snd_timer_free(struct snd_timer *timer) 8081da177e4SLinus Torvalds { 8097eaa943cSTakashi Iwai if (!timer) 8107eaa943cSTakashi Iwai return 0; 811c461482cSTakashi Iwai 812c461482cSTakashi Iwai mutex_lock(®ister_mutex); 813c461482cSTakashi Iwai if (! list_empty(&timer->open_list_head)) { 814c461482cSTakashi Iwai struct list_head *p, *n; 815c461482cSTakashi Iwai struct snd_timer_instance *ti; 816c461482cSTakashi Iwai snd_printk(KERN_WARNING "timer %p is busy?\n", timer); 817c461482cSTakashi Iwai list_for_each_safe(p, n, &timer->open_list_head) { 818c461482cSTakashi Iwai list_del_init(p); 819c461482cSTakashi Iwai ti = list_entry(p, struct snd_timer_instance, open_list); 820c461482cSTakashi Iwai ti->timer = NULL; 821c461482cSTakashi Iwai } 822c461482cSTakashi Iwai } 823c461482cSTakashi Iwai list_del(&timer->device_list); 824c461482cSTakashi Iwai mutex_unlock(®ister_mutex); 825c461482cSTakashi Iwai 8261da177e4SLinus Torvalds if (timer->private_free) 8271da177e4SLinus Torvalds timer->private_free(timer); 8281da177e4SLinus Torvalds kfree(timer); 8291da177e4SLinus Torvalds return 0; 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds 83253d2f744STakashi Iwai static int snd_timer_dev_free(struct snd_device *device) 8331da177e4SLinus Torvalds { 83453d2f744STakashi Iwai struct snd_timer *timer = device->device_data; 8351da177e4SLinus Torvalds return snd_timer_free(timer); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds 83853d2f744STakashi Iwai static int snd_timer_dev_register(struct snd_device *dev) 8391da177e4SLinus Torvalds { 84053d2f744STakashi Iwai struct snd_timer *timer = dev->device_data; 84153d2f744STakashi Iwai struct snd_timer *timer1; 8421da177e4SLinus Torvalds 8437eaa943cSTakashi Iwai if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) 8447eaa943cSTakashi Iwai return -ENXIO; 8451da177e4SLinus Torvalds if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && 8461da177e4SLinus Torvalds !timer->hw.resolution && timer->hw.c_resolution == NULL) 8471da177e4SLinus Torvalds return -EINVAL; 8481da177e4SLinus Torvalds 8491a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 8509244b2c3SJohannes Berg list_for_each_entry(timer1, &snd_timer_list, device_list) { 8511da177e4SLinus Torvalds if (timer1->tmr_class > timer->tmr_class) 8521da177e4SLinus Torvalds break; 8531da177e4SLinus Torvalds if (timer1->tmr_class < timer->tmr_class) 8541da177e4SLinus Torvalds continue; 8551da177e4SLinus Torvalds if (timer1->card && timer->card) { 8561da177e4SLinus Torvalds if (timer1->card->number > timer->card->number) 8571da177e4SLinus Torvalds break; 8581da177e4SLinus Torvalds if (timer1->card->number < timer->card->number) 8591da177e4SLinus Torvalds continue; 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds if (timer1->tmr_device > timer->tmr_device) 8621da177e4SLinus Torvalds break; 8631da177e4SLinus Torvalds if (timer1->tmr_device < timer->tmr_device) 8641da177e4SLinus Torvalds continue; 8651da177e4SLinus Torvalds if (timer1->tmr_subdevice > timer->tmr_subdevice) 8661da177e4SLinus Torvalds break; 8671da177e4SLinus Torvalds if (timer1->tmr_subdevice < timer->tmr_subdevice) 8681da177e4SLinus Torvalds continue; 8691da177e4SLinus Torvalds /* conflicts.. */ 8701a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 8711da177e4SLinus Torvalds return -EBUSY; 8721da177e4SLinus Torvalds } 8739244b2c3SJohannes Berg list_add_tail(&timer->device_list, &timer1->device_list); 8741a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 8751da177e4SLinus Torvalds return 0; 8761da177e4SLinus Torvalds } 8771da177e4SLinus Torvalds 878c461482cSTakashi Iwai static int snd_timer_dev_disconnect(struct snd_device *device) 8791da177e4SLinus Torvalds { 88053d2f744STakashi Iwai struct snd_timer *timer = device->device_data; 881c461482cSTakashi Iwai mutex_lock(®ister_mutex); 882c461482cSTakashi Iwai list_del_init(&timer->device_list); 883c461482cSTakashi Iwai mutex_unlock(®ister_mutex); 884c461482cSTakashi Iwai return 0; 8851da177e4SLinus Torvalds } 8861da177e4SLinus Torvalds 88753d2f744STakashi Iwai void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) 8881da177e4SLinus Torvalds { 8891da177e4SLinus Torvalds unsigned long flags; 8901da177e4SLinus Torvalds unsigned long resolution = 0; 89153d2f744STakashi Iwai struct snd_timer_instance *ti, *ts; 8921da177e4SLinus Torvalds 8937c22f1aaSTakashi Iwai if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) 8947c22f1aaSTakashi Iwai return; 8957eaa943cSTakashi Iwai if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || 8967eaa943cSTakashi Iwai event > SNDRV_TIMER_EVENT_MRESUME)) 8977eaa943cSTakashi Iwai return; 8981da177e4SLinus Torvalds spin_lock_irqsave(&timer->lock, flags); 899a501dfa3SJaroslav Kysela if (event == SNDRV_TIMER_EVENT_MSTART || 900a501dfa3SJaroslav Kysela event == SNDRV_TIMER_EVENT_MCONTINUE || 901a501dfa3SJaroslav Kysela event == SNDRV_TIMER_EVENT_MRESUME) { 9021da177e4SLinus Torvalds if (timer->hw.c_resolution) 9031da177e4SLinus Torvalds resolution = timer->hw.c_resolution(timer); 9041da177e4SLinus Torvalds else 9051da177e4SLinus Torvalds resolution = timer->hw.resolution; 9061da177e4SLinus Torvalds } 9079244b2c3SJohannes Berg list_for_each_entry(ti, &timer->active_list_head, active_list) { 9081da177e4SLinus Torvalds if (ti->ccallback) 9091da177e4SLinus Torvalds ti->ccallback(ti, event, tstamp, resolution); 9109244b2c3SJohannes Berg list_for_each_entry(ts, &ti->slave_active_head, active_list) 9111da177e4SLinus Torvalds if (ts->ccallback) 9121da177e4SLinus Torvalds ts->ccallback(ts, event, tstamp, resolution); 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds spin_unlock_irqrestore(&timer->lock, flags); 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds /* 9181da177e4SLinus Torvalds * exported functions for global timers 9191da177e4SLinus Torvalds */ 92053d2f744STakashi Iwai int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) 9211da177e4SLinus Torvalds { 92253d2f744STakashi Iwai struct snd_timer_id tid; 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; 9251da177e4SLinus Torvalds tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; 9261da177e4SLinus Torvalds tid.card = -1; 9271da177e4SLinus Torvalds tid.device = device; 9281da177e4SLinus Torvalds tid.subdevice = 0; 9291da177e4SLinus Torvalds return snd_timer_new(NULL, id, &tid, rtimer); 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 93253d2f744STakashi Iwai int snd_timer_global_free(struct snd_timer *timer) 9331da177e4SLinus Torvalds { 9341da177e4SLinus Torvalds return snd_timer_free(timer); 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds 93753d2f744STakashi Iwai int snd_timer_global_register(struct snd_timer *timer) 9381da177e4SLinus Torvalds { 93953d2f744STakashi Iwai struct snd_device dev; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds memset(&dev, 0, sizeof(dev)); 9421da177e4SLinus Torvalds dev.device_data = timer; 9431da177e4SLinus Torvalds return snd_timer_dev_register(&dev); 9441da177e4SLinus Torvalds } 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds /* 9471da177e4SLinus Torvalds * System timer 9481da177e4SLinus Torvalds */ 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds struct snd_timer_system_private { 9511da177e4SLinus Torvalds struct timer_list tlist; 9521da177e4SLinus Torvalds unsigned long last_expires; 9531da177e4SLinus Torvalds unsigned long last_jiffies; 9541da177e4SLinus Torvalds unsigned long correction; 9551da177e4SLinus Torvalds }; 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds static void snd_timer_s_function(unsigned long data) 9581da177e4SLinus Torvalds { 95953d2f744STakashi Iwai struct snd_timer *timer = (struct snd_timer *)data; 9601da177e4SLinus Torvalds struct snd_timer_system_private *priv = timer->private_data; 9611da177e4SLinus Torvalds unsigned long jiff = jiffies; 9621da177e4SLinus Torvalds if (time_after(jiff, priv->last_expires)) 9636ed5eff0SClemens Ladisch priv->correction += (long)jiff - (long)priv->last_expires; 9641da177e4SLinus Torvalds snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 96753d2f744STakashi Iwai static int snd_timer_s_start(struct snd_timer * timer) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds struct snd_timer_system_private *priv; 9701da177e4SLinus Torvalds unsigned long njiff; 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds priv = (struct snd_timer_system_private *) timer->private_data; 9731da177e4SLinus Torvalds njiff = (priv->last_jiffies = jiffies); 9741da177e4SLinus Torvalds if (priv->correction > timer->sticks - 1) { 9751da177e4SLinus Torvalds priv->correction -= timer->sticks - 1; 9761da177e4SLinus Torvalds njiff++; 9771da177e4SLinus Torvalds } else { 9781da177e4SLinus Torvalds njiff += timer->sticks - priv->correction; 97917f48ec3SClemens Ladisch priv->correction = 0; 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds priv->last_expires = priv->tlist.expires = njiff; 9821da177e4SLinus Torvalds add_timer(&priv->tlist); 9831da177e4SLinus Torvalds return 0; 9841da177e4SLinus Torvalds } 9851da177e4SLinus Torvalds 98653d2f744STakashi Iwai static int snd_timer_s_stop(struct snd_timer * timer) 9871da177e4SLinus Torvalds { 9881da177e4SLinus Torvalds struct snd_timer_system_private *priv; 9891da177e4SLinus Torvalds unsigned long jiff; 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds priv = (struct snd_timer_system_private *) timer->private_data; 9921da177e4SLinus Torvalds del_timer(&priv->tlist); 9931da177e4SLinus Torvalds jiff = jiffies; 9941da177e4SLinus Torvalds if (time_before(jiff, priv->last_expires)) 9951da177e4SLinus Torvalds timer->sticks = priv->last_expires - jiff; 9961da177e4SLinus Torvalds else 9971da177e4SLinus Torvalds timer->sticks = 1; 998de2696d8SClemens Ladisch priv->correction = 0; 9991da177e4SLinus Torvalds return 0; 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds 100253d2f744STakashi Iwai static struct snd_timer_hardware snd_timer_system = 10031da177e4SLinus Torvalds { 10041da177e4SLinus Torvalds .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, 10051da177e4SLinus Torvalds .resolution = 1000000000L / HZ, 10061da177e4SLinus Torvalds .ticks = 10000000L, 10071da177e4SLinus Torvalds .start = snd_timer_s_start, 10081da177e4SLinus Torvalds .stop = snd_timer_s_stop 10091da177e4SLinus Torvalds }; 10101da177e4SLinus Torvalds 101153d2f744STakashi Iwai static void snd_timer_free_system(struct snd_timer *timer) 10121da177e4SLinus Torvalds { 10131da177e4SLinus Torvalds kfree(timer->private_data); 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds static int snd_timer_register_system(void) 10171da177e4SLinus Torvalds { 101853d2f744STakashi Iwai struct snd_timer *timer; 10191da177e4SLinus Torvalds struct snd_timer_system_private *priv; 10201da177e4SLinus Torvalds int err; 10211da177e4SLinus Torvalds 10226b172a85SClemens Ladisch err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); 10236b172a85SClemens Ladisch if (err < 0) 10241da177e4SLinus Torvalds return err; 10251da177e4SLinus Torvalds strcpy(timer->name, "system timer"); 10261da177e4SLinus Torvalds timer->hw = snd_timer_system; 1027ca2c0966STakashi Iwai priv = kzalloc(sizeof(*priv), GFP_KERNEL); 10281da177e4SLinus Torvalds if (priv == NULL) { 10291da177e4SLinus Torvalds snd_timer_free(timer); 10301da177e4SLinus Torvalds return -ENOMEM; 10311da177e4SLinus Torvalds } 10321da177e4SLinus Torvalds init_timer(&priv->tlist); 10331da177e4SLinus Torvalds priv->tlist.function = snd_timer_s_function; 10341da177e4SLinus Torvalds priv->tlist.data = (unsigned long) timer; 10351da177e4SLinus Torvalds timer->private_data = priv; 10361da177e4SLinus Torvalds timer->private_free = snd_timer_free_system; 10371da177e4SLinus Torvalds return snd_timer_global_register(timer); 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds 1040e28563ccSTakashi Iwai #ifdef CONFIG_PROC_FS 10411da177e4SLinus Torvalds /* 10421da177e4SLinus Torvalds * Info interface 10431da177e4SLinus Torvalds */ 10441da177e4SLinus Torvalds 104553d2f744STakashi Iwai static void snd_timer_proc_read(struct snd_info_entry *entry, 104653d2f744STakashi Iwai struct snd_info_buffer *buffer) 10471da177e4SLinus Torvalds { 104853d2f744STakashi Iwai struct snd_timer *timer; 104953d2f744STakashi Iwai struct snd_timer_instance *ti; 10501da177e4SLinus Torvalds 10511a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 10529244b2c3SJohannes Berg list_for_each_entry(timer, &snd_timer_list, device_list) { 10531da177e4SLinus Torvalds switch (timer->tmr_class) { 10541da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_GLOBAL: 10551da177e4SLinus Torvalds snd_iprintf(buffer, "G%i: ", timer->tmr_device); 10561da177e4SLinus Torvalds break; 10571da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_CARD: 10586b172a85SClemens Ladisch snd_iprintf(buffer, "C%i-%i: ", 10596b172a85SClemens Ladisch timer->card->number, timer->tmr_device); 10601da177e4SLinus Torvalds break; 10611da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_PCM: 10626b172a85SClemens Ladisch snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, 10636b172a85SClemens Ladisch timer->tmr_device, timer->tmr_subdevice); 10641da177e4SLinus Torvalds break; 10651da177e4SLinus Torvalds default: 10666b172a85SClemens Ladisch snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, 10676b172a85SClemens Ladisch timer->card ? timer->card->number : -1, 10686b172a85SClemens Ladisch timer->tmr_device, timer->tmr_subdevice); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds snd_iprintf(buffer, "%s :", timer->name); 10711da177e4SLinus Torvalds if (timer->hw.resolution) 10726b172a85SClemens Ladisch snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", 10736b172a85SClemens Ladisch timer->hw.resolution / 1000, 10746b172a85SClemens Ladisch timer->hw.resolution % 1000, 10756b172a85SClemens Ladisch timer->hw.ticks); 10761da177e4SLinus Torvalds if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) 10771da177e4SLinus Torvalds snd_iprintf(buffer, " SLAVE"); 10781da177e4SLinus Torvalds snd_iprintf(buffer, "\n"); 10799244b2c3SJohannes Berg list_for_each_entry(ti, &timer->open_list_head, open_list) 10806b172a85SClemens Ladisch snd_iprintf(buffer, " Client %s : %s\n", 10811da177e4SLinus Torvalds ti->owner ? ti->owner : "unknown", 10826b172a85SClemens Ladisch ti->flags & (SNDRV_TIMER_IFLG_START | 10836b172a85SClemens Ladisch SNDRV_TIMER_IFLG_RUNNING) 10846b172a85SClemens Ladisch ? "running" : "stopped"); 10851da177e4SLinus Torvalds } 10861a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10896581f4e7STakashi Iwai static struct snd_info_entry *snd_timer_proc_entry; 1090e28563ccSTakashi Iwai 1091e28563ccSTakashi Iwai static void __init snd_timer_proc_init(void) 1092e28563ccSTakashi Iwai { 1093e28563ccSTakashi Iwai struct snd_info_entry *entry; 1094e28563ccSTakashi Iwai 1095e28563ccSTakashi Iwai entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); 1096e28563ccSTakashi Iwai if (entry != NULL) { 1097e28563ccSTakashi Iwai entry->c.text.read = snd_timer_proc_read; 1098e28563ccSTakashi Iwai if (snd_info_register(entry) < 0) { 1099e28563ccSTakashi Iwai snd_info_free_entry(entry); 1100e28563ccSTakashi Iwai entry = NULL; 1101e28563ccSTakashi Iwai } 1102e28563ccSTakashi Iwai } 1103e28563ccSTakashi Iwai snd_timer_proc_entry = entry; 1104e28563ccSTakashi Iwai } 1105e28563ccSTakashi Iwai 1106e28563ccSTakashi Iwai static void __exit snd_timer_proc_done(void) 1107e28563ccSTakashi Iwai { 1108746d4a02STakashi Iwai snd_info_free_entry(snd_timer_proc_entry); 1109e28563ccSTakashi Iwai } 1110e28563ccSTakashi Iwai #else /* !CONFIG_PROC_FS */ 1111e28563ccSTakashi Iwai #define snd_timer_proc_init() 1112e28563ccSTakashi Iwai #define snd_timer_proc_done() 1113e28563ccSTakashi Iwai #endif 1114e28563ccSTakashi Iwai 11151da177e4SLinus Torvalds /* 11161da177e4SLinus Torvalds * USER SPACE interface 11171da177e4SLinus Torvalds */ 11181da177e4SLinus Torvalds 111953d2f744STakashi Iwai static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, 11201da177e4SLinus Torvalds unsigned long resolution, 11211da177e4SLinus Torvalds unsigned long ticks) 11221da177e4SLinus Torvalds { 112353d2f744STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 112453d2f744STakashi Iwai struct snd_timer_read *r; 11251da177e4SLinus Torvalds int prev; 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds spin_lock(&tu->qlock); 11281da177e4SLinus Torvalds if (tu->qused > 0) { 11291da177e4SLinus Torvalds prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; 11301da177e4SLinus Torvalds r = &tu->queue[prev]; 11311da177e4SLinus Torvalds if (r->resolution == resolution) { 11321da177e4SLinus Torvalds r->ticks += ticks; 11331da177e4SLinus Torvalds goto __wake; 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds if (tu->qused >= tu->queue_size) { 11371da177e4SLinus Torvalds tu->overrun++; 11381da177e4SLinus Torvalds } else { 11391da177e4SLinus Torvalds r = &tu->queue[tu->qtail++]; 11401da177e4SLinus Torvalds tu->qtail %= tu->queue_size; 11411da177e4SLinus Torvalds r->resolution = resolution; 11421da177e4SLinus Torvalds r->ticks = ticks; 11431da177e4SLinus Torvalds tu->qused++; 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds __wake: 11461da177e4SLinus Torvalds spin_unlock(&tu->qlock); 11471da177e4SLinus Torvalds kill_fasync(&tu->fasync, SIGIO, POLL_IN); 11481da177e4SLinus Torvalds wake_up(&tu->qchange_sleep); 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds 115153d2f744STakashi Iwai static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, 115253d2f744STakashi Iwai struct snd_timer_tread *tread) 11531da177e4SLinus Torvalds { 11541da177e4SLinus Torvalds if (tu->qused >= tu->queue_size) { 11551da177e4SLinus Torvalds tu->overrun++; 11561da177e4SLinus Torvalds } else { 11571da177e4SLinus Torvalds memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); 11581da177e4SLinus Torvalds tu->qtail %= tu->queue_size; 11591da177e4SLinus Torvalds tu->qused++; 11601da177e4SLinus Torvalds } 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds 116353d2f744STakashi Iwai static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, 116453d2f744STakashi Iwai int event, 11651da177e4SLinus Torvalds struct timespec *tstamp, 11661da177e4SLinus Torvalds unsigned long resolution) 11671da177e4SLinus Torvalds { 116853d2f744STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 116953d2f744STakashi Iwai struct snd_timer_tread r1; 1170bfe70783SDan Carpenter unsigned long flags; 11711da177e4SLinus Torvalds 11726b172a85SClemens Ladisch if (event >= SNDRV_TIMER_EVENT_START && 11736b172a85SClemens Ladisch event <= SNDRV_TIMER_EVENT_PAUSE) 11741da177e4SLinus Torvalds tu->tstamp = *tstamp; 11751da177e4SLinus Torvalds if ((tu->filter & (1 << event)) == 0 || !tu->tread) 11761da177e4SLinus Torvalds return; 11771da177e4SLinus Torvalds r1.event = event; 11781da177e4SLinus Torvalds r1.tstamp = *tstamp; 11791da177e4SLinus Torvalds r1.val = resolution; 1180bfe70783SDan Carpenter spin_lock_irqsave(&tu->qlock, flags); 11811da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &r1); 1182bfe70783SDan Carpenter spin_unlock_irqrestore(&tu->qlock, flags); 11831da177e4SLinus Torvalds kill_fasync(&tu->fasync, SIGIO, POLL_IN); 11841da177e4SLinus Torvalds wake_up(&tu->qchange_sleep); 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds 118753d2f744STakashi Iwai static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, 11881da177e4SLinus Torvalds unsigned long resolution, 11891da177e4SLinus Torvalds unsigned long ticks) 11901da177e4SLinus Torvalds { 119153d2f744STakashi Iwai struct snd_timer_user *tu = timeri->callback_data; 119253d2f744STakashi Iwai struct snd_timer_tread *r, r1; 11931da177e4SLinus Torvalds struct timespec tstamp; 11941da177e4SLinus Torvalds int prev, append = 0; 11951da177e4SLinus Torvalds 119607799e75STakashi Iwai memset(&tstamp, 0, sizeof(tstamp)); 11971da177e4SLinus Torvalds spin_lock(&tu->qlock); 11986b172a85SClemens Ladisch if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | 11996b172a85SClemens Ladisch (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { 12001da177e4SLinus Torvalds spin_unlock(&tu->qlock); 12011da177e4SLinus Torvalds return; 12021da177e4SLinus Torvalds } 1203b751eef1SJaroslav Kysela if (tu->last_resolution != resolution || ticks > 0) { 1204b751eef1SJaroslav Kysela if (timer_tstamp_monotonic) 1205b751eef1SJaroslav Kysela do_posix_clock_monotonic_gettime(&tstamp); 1206b751eef1SJaroslav Kysela else 120707799e75STakashi Iwai getnstimeofday(&tstamp); 1208b751eef1SJaroslav Kysela } 12096b172a85SClemens Ladisch if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && 12106b172a85SClemens Ladisch tu->last_resolution != resolution) { 12111da177e4SLinus Torvalds r1.event = SNDRV_TIMER_EVENT_RESOLUTION; 12121da177e4SLinus Torvalds r1.tstamp = tstamp; 12131da177e4SLinus Torvalds r1.val = resolution; 12141da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &r1); 12151da177e4SLinus Torvalds tu->last_resolution = resolution; 12161da177e4SLinus Torvalds append++; 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) 12191da177e4SLinus Torvalds goto __wake; 12201da177e4SLinus Torvalds if (ticks == 0) 12211da177e4SLinus Torvalds goto __wake; 12221da177e4SLinus Torvalds if (tu->qused > 0) { 12231da177e4SLinus Torvalds prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; 12241da177e4SLinus Torvalds r = &tu->tqueue[prev]; 12251da177e4SLinus Torvalds if (r->event == SNDRV_TIMER_EVENT_TICK) { 12261da177e4SLinus Torvalds r->tstamp = tstamp; 12271da177e4SLinus Torvalds r->val += ticks; 12281da177e4SLinus Torvalds append++; 12291da177e4SLinus Torvalds goto __wake; 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds r1.event = SNDRV_TIMER_EVENT_TICK; 12331da177e4SLinus Torvalds r1.tstamp = tstamp; 12341da177e4SLinus Torvalds r1.val = ticks; 12351da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &r1); 12361da177e4SLinus Torvalds append++; 12371da177e4SLinus Torvalds __wake: 12381da177e4SLinus Torvalds spin_unlock(&tu->qlock); 12391da177e4SLinus Torvalds if (append == 0) 12401da177e4SLinus Torvalds return; 12411da177e4SLinus Torvalds kill_fasync(&tu->fasync, SIGIO, POLL_IN); 12421da177e4SLinus Torvalds wake_up(&tu->qchange_sleep); 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds static int snd_timer_user_open(struct inode *inode, struct file *file) 12461da177e4SLinus Torvalds { 124753d2f744STakashi Iwai struct snd_timer_user *tu; 124802f4865fSTakashi Iwai int err; 124902f4865fSTakashi Iwai 125002f4865fSTakashi Iwai err = nonseekable_open(inode, file); 125102f4865fSTakashi Iwai if (err < 0) 125202f4865fSTakashi Iwai return err; 12531da177e4SLinus Torvalds 1254ca2c0966STakashi Iwai tu = kzalloc(sizeof(*tu), GFP_KERNEL); 12551da177e4SLinus Torvalds if (tu == NULL) 12561da177e4SLinus Torvalds return -ENOMEM; 12571da177e4SLinus Torvalds spin_lock_init(&tu->qlock); 12581da177e4SLinus Torvalds init_waitqueue_head(&tu->qchange_sleep); 12591a60d4c5SIngo Molnar mutex_init(&tu->tread_sem); 12601da177e4SLinus Torvalds tu->ticks = 1; 12611da177e4SLinus Torvalds tu->queue_size = 128; 126253d2f744STakashi Iwai tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), 12636b172a85SClemens Ladisch GFP_KERNEL); 12641da177e4SLinus Torvalds if (tu->queue == NULL) { 12651da177e4SLinus Torvalds kfree(tu); 12661da177e4SLinus Torvalds return -ENOMEM; 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds file->private_data = tu; 12691da177e4SLinus Torvalds return 0; 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds static int snd_timer_user_release(struct inode *inode, struct file *file) 12731da177e4SLinus Torvalds { 127453d2f744STakashi Iwai struct snd_timer_user *tu; 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds if (file->private_data) { 12771da177e4SLinus Torvalds tu = file->private_data; 12781da177e4SLinus Torvalds file->private_data = NULL; 12791da177e4SLinus Torvalds if (tu->timeri) 12801da177e4SLinus Torvalds snd_timer_close(tu->timeri); 12811da177e4SLinus Torvalds kfree(tu->queue); 12821da177e4SLinus Torvalds kfree(tu->tqueue); 12831da177e4SLinus Torvalds kfree(tu); 12841da177e4SLinus Torvalds } 12851da177e4SLinus Torvalds return 0; 12861da177e4SLinus Torvalds } 12871da177e4SLinus Torvalds 128853d2f744STakashi Iwai static void snd_timer_user_zero_id(struct snd_timer_id *id) 12891da177e4SLinus Torvalds { 12901da177e4SLinus Torvalds id->dev_class = SNDRV_TIMER_CLASS_NONE; 12911da177e4SLinus Torvalds id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; 12921da177e4SLinus Torvalds id->card = -1; 12931da177e4SLinus Torvalds id->device = -1; 12941da177e4SLinus Torvalds id->subdevice = -1; 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds 129753d2f744STakashi Iwai static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) 12981da177e4SLinus Torvalds { 12991da177e4SLinus Torvalds id->dev_class = timer->tmr_class; 13001da177e4SLinus Torvalds id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; 13011da177e4SLinus Torvalds id->card = timer->card ? timer->card->number : -1; 13021da177e4SLinus Torvalds id->device = timer->tmr_device; 13031da177e4SLinus Torvalds id->subdevice = timer->tmr_subdevice; 13041da177e4SLinus Torvalds } 13051da177e4SLinus Torvalds 130653d2f744STakashi Iwai static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) 13071da177e4SLinus Torvalds { 130853d2f744STakashi Iwai struct snd_timer_id id; 130953d2f744STakashi Iwai struct snd_timer *timer; 13101da177e4SLinus Torvalds struct list_head *p; 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds if (copy_from_user(&id, _tid, sizeof(id))) 13131da177e4SLinus Torvalds return -EFAULT; 13141a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 13151da177e4SLinus Torvalds if (id.dev_class < 0) { /* first item */ 13161da177e4SLinus Torvalds if (list_empty(&snd_timer_list)) 13171da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 13181da177e4SLinus Torvalds else { 13199dfba380SClemens Ladisch timer = list_entry(snd_timer_list.next, 132053d2f744STakashi Iwai struct snd_timer, device_list); 13211da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13221da177e4SLinus Torvalds } 13231da177e4SLinus Torvalds } else { 13241da177e4SLinus Torvalds switch (id.dev_class) { 13251da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_GLOBAL: 13261da177e4SLinus Torvalds id.device = id.device < 0 ? 0 : id.device + 1; 13271da177e4SLinus Torvalds list_for_each(p, &snd_timer_list) { 132853d2f744STakashi Iwai timer = list_entry(p, struct snd_timer, device_list); 13291da177e4SLinus Torvalds if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { 13301da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13311da177e4SLinus Torvalds break; 13321da177e4SLinus Torvalds } 13331da177e4SLinus Torvalds if (timer->tmr_device >= id.device) { 13341da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13351da177e4SLinus Torvalds break; 13361da177e4SLinus Torvalds } 13371da177e4SLinus Torvalds } 13381da177e4SLinus Torvalds if (p == &snd_timer_list) 13391da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 13401da177e4SLinus Torvalds break; 13411da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_CARD: 13421da177e4SLinus Torvalds case SNDRV_TIMER_CLASS_PCM: 13431da177e4SLinus Torvalds if (id.card < 0) { 13441da177e4SLinus Torvalds id.card = 0; 13451da177e4SLinus Torvalds } else { 13461da177e4SLinus Torvalds if (id.card < 0) { 13471da177e4SLinus Torvalds id.card = 0; 13481da177e4SLinus Torvalds } else { 13491da177e4SLinus Torvalds if (id.device < 0) { 13501da177e4SLinus Torvalds id.device = 0; 13511da177e4SLinus Torvalds } else { 13526b172a85SClemens Ladisch if (id.subdevice < 0) { 13536b172a85SClemens Ladisch id.subdevice = 0; 13546b172a85SClemens Ladisch } else { 13556b172a85SClemens Ladisch id.subdevice++; 13566b172a85SClemens Ladisch } 13571da177e4SLinus Torvalds } 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds } 13601da177e4SLinus Torvalds list_for_each(p, &snd_timer_list) { 136153d2f744STakashi Iwai timer = list_entry(p, struct snd_timer, device_list); 13621da177e4SLinus Torvalds if (timer->tmr_class > id.dev_class) { 13631da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13641da177e4SLinus Torvalds break; 13651da177e4SLinus Torvalds } 13661da177e4SLinus Torvalds if (timer->tmr_class < id.dev_class) 13671da177e4SLinus Torvalds continue; 13681da177e4SLinus Torvalds if (timer->card->number > id.card) { 13691da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13701da177e4SLinus Torvalds break; 13711da177e4SLinus Torvalds } 13721da177e4SLinus Torvalds if (timer->card->number < id.card) 13731da177e4SLinus Torvalds continue; 13741da177e4SLinus Torvalds if (timer->tmr_device > id.device) { 13751da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13761da177e4SLinus Torvalds break; 13771da177e4SLinus Torvalds } 13781da177e4SLinus Torvalds if (timer->tmr_device < id.device) 13791da177e4SLinus Torvalds continue; 13801da177e4SLinus Torvalds if (timer->tmr_subdevice > id.subdevice) { 13811da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13821da177e4SLinus Torvalds break; 13831da177e4SLinus Torvalds } 13841da177e4SLinus Torvalds if (timer->tmr_subdevice < id.subdevice) 13851da177e4SLinus Torvalds continue; 13861da177e4SLinus Torvalds snd_timer_user_copy_id(&id, timer); 13871da177e4SLinus Torvalds break; 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds if (p == &snd_timer_list) 13901da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 13911da177e4SLinus Torvalds break; 13921da177e4SLinus Torvalds default: 13931da177e4SLinus Torvalds snd_timer_user_zero_id(&id); 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds } 13961a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 13971da177e4SLinus Torvalds if (copy_to_user(_tid, &id, sizeof(*_tid))) 13981da177e4SLinus Torvalds return -EFAULT; 13991da177e4SLinus Torvalds return 0; 14001da177e4SLinus Torvalds } 14011da177e4SLinus Torvalds 14026b172a85SClemens Ladisch static int snd_timer_user_ginfo(struct file *file, 140353d2f744STakashi Iwai struct snd_timer_ginfo __user *_ginfo) 14041da177e4SLinus Torvalds { 140553d2f744STakashi Iwai struct snd_timer_ginfo *ginfo; 140653d2f744STakashi Iwai struct snd_timer_id tid; 140753d2f744STakashi Iwai struct snd_timer *t; 14081da177e4SLinus Torvalds struct list_head *p; 14091da177e4SLinus Torvalds int err = 0; 14101da177e4SLinus Torvalds 1411ef44a1ecSLi Zefan ginfo = memdup_user(_ginfo, sizeof(*ginfo)); 1412ef44a1ecSLi Zefan if (IS_ERR(ginfo)) 1413ef44a1ecSLi Zefan return PTR_ERR(ginfo); 1414ef44a1ecSLi Zefan 14151da177e4SLinus Torvalds tid = ginfo->tid; 14161da177e4SLinus Torvalds memset(ginfo, 0, sizeof(*ginfo)); 14171da177e4SLinus Torvalds ginfo->tid = tid; 14181a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 14191da177e4SLinus Torvalds t = snd_timer_find(&tid); 14201da177e4SLinus Torvalds if (t != NULL) { 14211da177e4SLinus Torvalds ginfo->card = t->card ? t->card->number : -1; 14221da177e4SLinus Torvalds if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) 14231da177e4SLinus Torvalds ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; 14241da177e4SLinus Torvalds strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); 14251da177e4SLinus Torvalds strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); 14261da177e4SLinus Torvalds ginfo->resolution = t->hw.resolution; 14271da177e4SLinus Torvalds if (t->hw.resolution_min > 0) { 14281da177e4SLinus Torvalds ginfo->resolution_min = t->hw.resolution_min; 14291da177e4SLinus Torvalds ginfo->resolution_max = t->hw.resolution_max; 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds list_for_each(p, &t->open_list_head) { 14321da177e4SLinus Torvalds ginfo->clients++; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds } else { 14351da177e4SLinus Torvalds err = -ENODEV; 14361da177e4SLinus Torvalds } 14371a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 14381da177e4SLinus Torvalds if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) 14391da177e4SLinus Torvalds err = -EFAULT; 14401da177e4SLinus Torvalds kfree(ginfo); 14411da177e4SLinus Torvalds return err; 14421da177e4SLinus Torvalds } 14431da177e4SLinus Torvalds 14446b172a85SClemens Ladisch static int snd_timer_user_gparams(struct file *file, 144553d2f744STakashi Iwai struct snd_timer_gparams __user *_gparams) 14461da177e4SLinus Torvalds { 144753d2f744STakashi Iwai struct snd_timer_gparams gparams; 144853d2f744STakashi Iwai struct snd_timer *t; 14491da177e4SLinus Torvalds int err; 14501da177e4SLinus Torvalds 14511da177e4SLinus Torvalds if (copy_from_user(&gparams, _gparams, sizeof(gparams))) 14521da177e4SLinus Torvalds return -EFAULT; 14531a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 14541da177e4SLinus Torvalds t = snd_timer_find(&gparams.tid); 14556b172a85SClemens Ladisch if (!t) { 14561da177e4SLinus Torvalds err = -ENODEV; 14576b172a85SClemens Ladisch goto _error; 14581da177e4SLinus Torvalds } 14596b172a85SClemens Ladisch if (!list_empty(&t->open_list_head)) { 14606b172a85SClemens Ladisch err = -EBUSY; 14616b172a85SClemens Ladisch goto _error; 14626b172a85SClemens Ladisch } 14636b172a85SClemens Ladisch if (!t->hw.set_period) { 14646b172a85SClemens Ladisch err = -ENOSYS; 14656b172a85SClemens Ladisch goto _error; 14666b172a85SClemens Ladisch } 14676b172a85SClemens Ladisch err = t->hw.set_period(t, gparams.period_num, gparams.period_den); 14686b172a85SClemens Ladisch _error: 14691a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 14701da177e4SLinus Torvalds return err; 14711da177e4SLinus Torvalds } 14721da177e4SLinus Torvalds 14736b172a85SClemens Ladisch static int snd_timer_user_gstatus(struct file *file, 147453d2f744STakashi Iwai struct snd_timer_gstatus __user *_gstatus) 14751da177e4SLinus Torvalds { 147653d2f744STakashi Iwai struct snd_timer_gstatus gstatus; 147753d2f744STakashi Iwai struct snd_timer_id tid; 147853d2f744STakashi Iwai struct snd_timer *t; 14791da177e4SLinus Torvalds int err = 0; 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) 14821da177e4SLinus Torvalds return -EFAULT; 14831da177e4SLinus Torvalds tid = gstatus.tid; 14841da177e4SLinus Torvalds memset(&gstatus, 0, sizeof(gstatus)); 14851da177e4SLinus Torvalds gstatus.tid = tid; 14861a60d4c5SIngo Molnar mutex_lock(®ister_mutex); 14871da177e4SLinus Torvalds t = snd_timer_find(&tid); 14881da177e4SLinus Torvalds if (t != NULL) { 14891da177e4SLinus Torvalds if (t->hw.c_resolution) 14901da177e4SLinus Torvalds gstatus.resolution = t->hw.c_resolution(t); 14911da177e4SLinus Torvalds else 14921da177e4SLinus Torvalds gstatus.resolution = t->hw.resolution; 14931da177e4SLinus Torvalds if (t->hw.precise_resolution) { 14946b172a85SClemens Ladisch t->hw.precise_resolution(t, &gstatus.resolution_num, 14956b172a85SClemens Ladisch &gstatus.resolution_den); 14961da177e4SLinus Torvalds } else { 14971da177e4SLinus Torvalds gstatus.resolution_num = gstatus.resolution; 14981da177e4SLinus Torvalds gstatus.resolution_den = 1000000000uL; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds } else { 15011da177e4SLinus Torvalds err = -ENODEV; 15021da177e4SLinus Torvalds } 15031a60d4c5SIngo Molnar mutex_unlock(®ister_mutex); 15041da177e4SLinus Torvalds if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) 15051da177e4SLinus Torvalds err = -EFAULT; 15061da177e4SLinus Torvalds return err; 15071da177e4SLinus Torvalds } 15081da177e4SLinus Torvalds 15096b172a85SClemens Ladisch static int snd_timer_user_tselect(struct file *file, 151053d2f744STakashi Iwai struct snd_timer_select __user *_tselect) 15111da177e4SLinus Torvalds { 151253d2f744STakashi Iwai struct snd_timer_user *tu; 151353d2f744STakashi Iwai struct snd_timer_select tselect; 15141da177e4SLinus Torvalds char str[32]; 1515c1935b4dSJaroslav Kysela int err = 0; 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds tu = file->private_data; 15181a60d4c5SIngo Molnar mutex_lock(&tu->tread_sem); 1519c1935b4dSJaroslav Kysela if (tu->timeri) { 15201da177e4SLinus Torvalds snd_timer_close(tu->timeri); 1521c1935b4dSJaroslav Kysela tu->timeri = NULL; 1522c1935b4dSJaroslav Kysela } 1523c1935b4dSJaroslav Kysela if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { 1524c1935b4dSJaroslav Kysela err = -EFAULT; 1525c1935b4dSJaroslav Kysela goto __err; 1526c1935b4dSJaroslav Kysela } 15271da177e4SLinus Torvalds sprintf(str, "application %i", current->pid); 15281da177e4SLinus Torvalds if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) 15291da177e4SLinus Torvalds tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; 15306b172a85SClemens Ladisch err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); 15316b172a85SClemens Ladisch if (err < 0) 1532c1935b4dSJaroslav Kysela goto __err; 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvalds kfree(tu->queue); 15351da177e4SLinus Torvalds tu->queue = NULL; 15361da177e4SLinus Torvalds kfree(tu->tqueue); 15371da177e4SLinus Torvalds tu->tqueue = NULL; 15381da177e4SLinus Torvalds if (tu->tread) { 153953d2f744STakashi Iwai tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), 15406b172a85SClemens Ladisch GFP_KERNEL); 1541c1935b4dSJaroslav Kysela if (tu->tqueue == NULL) 1542c1935b4dSJaroslav Kysela err = -ENOMEM; 15431da177e4SLinus Torvalds } else { 154453d2f744STakashi Iwai tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), 15456b172a85SClemens Ladisch GFP_KERNEL); 1546c1935b4dSJaroslav Kysela if (tu->queue == NULL) 1547c1935b4dSJaroslav Kysela err = -ENOMEM; 15481da177e4SLinus Torvalds } 15491da177e4SLinus Torvalds 1550c1935b4dSJaroslav Kysela if (err < 0) { 1551c1935b4dSJaroslav Kysela snd_timer_close(tu->timeri); 1552c1935b4dSJaroslav Kysela tu->timeri = NULL; 1553c1935b4dSJaroslav Kysela } else { 15541da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; 15556b172a85SClemens Ladisch tu->timeri->callback = tu->tread 15566b172a85SClemens Ladisch ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; 15571da177e4SLinus Torvalds tu->timeri->ccallback = snd_timer_user_ccallback; 15581da177e4SLinus Torvalds tu->timeri->callback_data = (void *)tu; 1559c1935b4dSJaroslav Kysela } 1560c1935b4dSJaroslav Kysela 1561c1935b4dSJaroslav Kysela __err: 15621a60d4c5SIngo Molnar mutex_unlock(&tu->tread_sem); 1563c1935b4dSJaroslav Kysela return err; 15641da177e4SLinus Torvalds } 15651da177e4SLinus Torvalds 15666b172a85SClemens Ladisch static int snd_timer_user_info(struct file *file, 156753d2f744STakashi Iwai struct snd_timer_info __user *_info) 15681da177e4SLinus Torvalds { 156953d2f744STakashi Iwai struct snd_timer_user *tu; 157053d2f744STakashi Iwai struct snd_timer_info *info; 157153d2f744STakashi Iwai struct snd_timer *t; 15721da177e4SLinus Torvalds int err = 0; 15731da177e4SLinus Torvalds 15741da177e4SLinus Torvalds tu = file->private_data; 15757c64ec34SClemens Ladisch if (!tu->timeri) 15767c64ec34SClemens Ladisch return -EBADFD; 15771da177e4SLinus Torvalds t = tu->timeri->timer; 15787c64ec34SClemens Ladisch if (!t) 15797c64ec34SClemens Ladisch return -EBADFD; 15801da177e4SLinus Torvalds 1581ca2c0966STakashi Iwai info = kzalloc(sizeof(*info), GFP_KERNEL); 15821da177e4SLinus Torvalds if (! info) 15831da177e4SLinus Torvalds return -ENOMEM; 15841da177e4SLinus Torvalds info->card = t->card ? t->card->number : -1; 15851da177e4SLinus Torvalds if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) 15861da177e4SLinus Torvalds info->flags |= SNDRV_TIMER_FLG_SLAVE; 15871da177e4SLinus Torvalds strlcpy(info->id, t->id, sizeof(info->id)); 15881da177e4SLinus Torvalds strlcpy(info->name, t->name, sizeof(info->name)); 15891da177e4SLinus Torvalds info->resolution = t->hw.resolution; 15901da177e4SLinus Torvalds if (copy_to_user(_info, info, sizeof(*_info))) 15911da177e4SLinus Torvalds err = -EFAULT; 15921da177e4SLinus Torvalds kfree(info); 15931da177e4SLinus Torvalds return err; 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds 15966b172a85SClemens Ladisch static int snd_timer_user_params(struct file *file, 159753d2f744STakashi Iwai struct snd_timer_params __user *_params) 15981da177e4SLinus Torvalds { 159953d2f744STakashi Iwai struct snd_timer_user *tu; 160053d2f744STakashi Iwai struct snd_timer_params params; 160153d2f744STakashi Iwai struct snd_timer *t; 160253d2f744STakashi Iwai struct snd_timer_read *tr; 160353d2f744STakashi Iwai struct snd_timer_tread *ttr; 16041da177e4SLinus Torvalds int err; 16051da177e4SLinus Torvalds 16061da177e4SLinus Torvalds tu = file->private_data; 16077c64ec34SClemens Ladisch if (!tu->timeri) 16087c64ec34SClemens Ladisch return -EBADFD; 16091da177e4SLinus Torvalds t = tu->timeri->timer; 16107c64ec34SClemens Ladisch if (!t) 16117c64ec34SClemens Ladisch return -EBADFD; 16121da177e4SLinus Torvalds if (copy_from_user(¶ms, _params, sizeof(params))) 16131da177e4SLinus Torvalds return -EFAULT; 16141da177e4SLinus Torvalds if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { 16151da177e4SLinus Torvalds err = -EINVAL; 16161da177e4SLinus Torvalds goto _end; 16171da177e4SLinus Torvalds } 16186b172a85SClemens Ladisch if (params.queue_size > 0 && 16196b172a85SClemens Ladisch (params.queue_size < 32 || params.queue_size > 1024)) { 16201da177e4SLinus Torvalds err = -EINVAL; 16211da177e4SLinus Torvalds goto _end; 16221da177e4SLinus Torvalds } 16231da177e4SLinus Torvalds if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| 16241da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_TICK)| 16251da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_START)| 16261da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_STOP)| 16271da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_CONTINUE)| 16281da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_PAUSE)| 1629a501dfa3SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_SUSPEND)| 1630a501dfa3SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_RESUME)| 16311da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_MSTART)| 16321da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_MSTOP)| 16331da177e4SLinus Torvalds (1<<SNDRV_TIMER_EVENT_MCONTINUE)| 163465d11d95SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_MPAUSE)| 163565d11d95SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_MSUSPEND)| 1636a501dfa3SJaroslav Kysela (1<<SNDRV_TIMER_EVENT_MRESUME))) { 16371da177e4SLinus Torvalds err = -EINVAL; 16381da177e4SLinus Torvalds goto _end; 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds snd_timer_stop(tu->timeri); 16411da177e4SLinus Torvalds spin_lock_irq(&t->lock); 16421da177e4SLinus Torvalds tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| 16431da177e4SLinus Torvalds SNDRV_TIMER_IFLG_EXCLUSIVE| 16441da177e4SLinus Torvalds SNDRV_TIMER_IFLG_EARLY_EVENT); 16451da177e4SLinus Torvalds if (params.flags & SNDRV_TIMER_PSFLG_AUTO) 16461da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; 16471da177e4SLinus Torvalds if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) 16481da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; 16491da177e4SLinus Torvalds if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) 16501da177e4SLinus Torvalds tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; 16511da177e4SLinus Torvalds spin_unlock_irq(&t->lock); 16526b172a85SClemens Ladisch if (params.queue_size > 0 && 16536b172a85SClemens Ladisch (unsigned int)tu->queue_size != params.queue_size) { 16541da177e4SLinus Torvalds if (tu->tread) { 16556b172a85SClemens Ladisch ttr = kmalloc(params.queue_size * sizeof(*ttr), 16566b172a85SClemens Ladisch GFP_KERNEL); 16571da177e4SLinus Torvalds if (ttr) { 16581da177e4SLinus Torvalds kfree(tu->tqueue); 16591da177e4SLinus Torvalds tu->queue_size = params.queue_size; 16601da177e4SLinus Torvalds tu->tqueue = ttr; 16611da177e4SLinus Torvalds } 16621da177e4SLinus Torvalds } else { 16636b172a85SClemens Ladisch tr = kmalloc(params.queue_size * sizeof(*tr), 16646b172a85SClemens Ladisch GFP_KERNEL); 16651da177e4SLinus Torvalds if (tr) { 16661da177e4SLinus Torvalds kfree(tu->queue); 16671da177e4SLinus Torvalds tu->queue_size = params.queue_size; 16681da177e4SLinus Torvalds tu->queue = tr; 16691da177e4SLinus Torvalds } 16701da177e4SLinus Torvalds } 16711da177e4SLinus Torvalds } 16721da177e4SLinus Torvalds tu->qhead = tu->qtail = tu->qused = 0; 16731da177e4SLinus Torvalds if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { 16741da177e4SLinus Torvalds if (tu->tread) { 167553d2f744STakashi Iwai struct snd_timer_tread tread; 16761da177e4SLinus Torvalds tread.event = SNDRV_TIMER_EVENT_EARLY; 16771da177e4SLinus Torvalds tread.tstamp.tv_sec = 0; 16781da177e4SLinus Torvalds tread.tstamp.tv_nsec = 0; 16791da177e4SLinus Torvalds tread.val = 0; 16801da177e4SLinus Torvalds snd_timer_user_append_to_tqueue(tu, &tread); 16811da177e4SLinus Torvalds } else { 168253d2f744STakashi Iwai struct snd_timer_read *r = &tu->queue[0]; 16831da177e4SLinus Torvalds r->resolution = 0; 16841da177e4SLinus Torvalds r->ticks = 0; 16851da177e4SLinus Torvalds tu->qused++; 16861da177e4SLinus Torvalds tu->qtail++; 16871da177e4SLinus Torvalds } 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds tu->filter = params.filter; 16901da177e4SLinus Torvalds tu->ticks = params.ticks; 16911da177e4SLinus Torvalds err = 0; 16921da177e4SLinus Torvalds _end: 16931da177e4SLinus Torvalds if (copy_to_user(_params, ¶ms, sizeof(params))) 16941da177e4SLinus Torvalds return -EFAULT; 16951da177e4SLinus Torvalds return err; 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds 16986b172a85SClemens Ladisch static int snd_timer_user_status(struct file *file, 169953d2f744STakashi Iwai struct snd_timer_status __user *_status) 17001da177e4SLinus Torvalds { 170153d2f744STakashi Iwai struct snd_timer_user *tu; 170253d2f744STakashi Iwai struct snd_timer_status status; 17031da177e4SLinus Torvalds 17041da177e4SLinus Torvalds tu = file->private_data; 17057c64ec34SClemens Ladisch if (!tu->timeri) 17067c64ec34SClemens Ladisch return -EBADFD; 17071da177e4SLinus Torvalds memset(&status, 0, sizeof(status)); 17081da177e4SLinus Torvalds status.tstamp = tu->tstamp; 17091da177e4SLinus Torvalds status.resolution = snd_timer_resolution(tu->timeri); 17101da177e4SLinus Torvalds status.lost = tu->timeri->lost; 17111da177e4SLinus Torvalds status.overrun = tu->overrun; 17121da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 17131da177e4SLinus Torvalds status.queue = tu->qused; 17141da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 17151da177e4SLinus Torvalds if (copy_to_user(_status, &status, sizeof(status))) 17161da177e4SLinus Torvalds return -EFAULT; 17171da177e4SLinus Torvalds return 0; 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds static int snd_timer_user_start(struct file *file) 17211da177e4SLinus Torvalds { 17221da177e4SLinus Torvalds int err; 172353d2f744STakashi Iwai struct snd_timer_user *tu; 17241da177e4SLinus Torvalds 17251da177e4SLinus Torvalds tu = file->private_data; 17267c64ec34SClemens Ladisch if (!tu->timeri) 17277c64ec34SClemens Ladisch return -EBADFD; 17281da177e4SLinus Torvalds snd_timer_stop(tu->timeri); 17291da177e4SLinus Torvalds tu->timeri->lost = 0; 17301da177e4SLinus Torvalds tu->last_resolution = 0; 17311da177e4SLinus Torvalds return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; 17321da177e4SLinus Torvalds } 17331da177e4SLinus Torvalds 17341da177e4SLinus Torvalds static int snd_timer_user_stop(struct file *file) 17351da177e4SLinus Torvalds { 17361da177e4SLinus Torvalds int err; 173753d2f744STakashi Iwai struct snd_timer_user *tu; 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds tu = file->private_data; 17407c64ec34SClemens Ladisch if (!tu->timeri) 17417c64ec34SClemens Ladisch return -EBADFD; 17421da177e4SLinus Torvalds return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds 17451da177e4SLinus Torvalds static int snd_timer_user_continue(struct file *file) 17461da177e4SLinus Torvalds { 17471da177e4SLinus Torvalds int err; 174853d2f744STakashi Iwai struct snd_timer_user *tu; 17491da177e4SLinus Torvalds 17501da177e4SLinus Torvalds tu = file->private_data; 17517c64ec34SClemens Ladisch if (!tu->timeri) 17527c64ec34SClemens Ladisch return -EBADFD; 17531da177e4SLinus Torvalds tu->timeri->lost = 0; 17541da177e4SLinus Torvalds return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds 175715790a6bSTakashi Iwai static int snd_timer_user_pause(struct file *file) 175815790a6bSTakashi Iwai { 175915790a6bSTakashi Iwai int err; 176053d2f744STakashi Iwai struct snd_timer_user *tu; 176115790a6bSTakashi Iwai 176215790a6bSTakashi Iwai tu = file->private_data; 17637c64ec34SClemens Ladisch if (!tu->timeri) 17647c64ec34SClemens Ladisch return -EBADFD; 1765d138b445SJaroslav Kysela return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; 176615790a6bSTakashi Iwai } 176715790a6bSTakashi Iwai 17688c50b37cSTakashi Iwai enum { 17698c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), 17708c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), 17718c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), 17728c50b37cSTakashi Iwai SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), 17738c50b37cSTakashi Iwai }; 17748c50b37cSTakashi Iwai 17756b172a85SClemens Ladisch static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, 17766b172a85SClemens Ladisch unsigned long arg) 17771da177e4SLinus Torvalds { 177853d2f744STakashi Iwai struct snd_timer_user *tu; 17791da177e4SLinus Torvalds void __user *argp = (void __user *)arg; 17801da177e4SLinus Torvalds int __user *p = argp; 17811da177e4SLinus Torvalds 17821da177e4SLinus Torvalds tu = file->private_data; 17831da177e4SLinus Torvalds switch (cmd) { 17841da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_PVERSION: 17851da177e4SLinus Torvalds return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; 17861da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_NEXT_DEVICE: 17871da177e4SLinus Torvalds return snd_timer_user_next_device(argp); 17881da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_TREAD: 17891da177e4SLinus Torvalds { 17901da177e4SLinus Torvalds int xarg; 17911da177e4SLinus Torvalds 17921a60d4c5SIngo Molnar mutex_lock(&tu->tread_sem); 1793c1935b4dSJaroslav Kysela if (tu->timeri) { /* too late */ 17941a60d4c5SIngo Molnar mutex_unlock(&tu->tread_sem); 17951da177e4SLinus Torvalds return -EBUSY; 1796c1935b4dSJaroslav Kysela } 1797c1935b4dSJaroslav Kysela if (get_user(xarg, p)) { 17981a60d4c5SIngo Molnar mutex_unlock(&tu->tread_sem); 17991da177e4SLinus Torvalds return -EFAULT; 1800c1935b4dSJaroslav Kysela } 18011da177e4SLinus Torvalds tu->tread = xarg ? 1 : 0; 18021a60d4c5SIngo Molnar mutex_unlock(&tu->tread_sem); 18031da177e4SLinus Torvalds return 0; 18041da177e4SLinus Torvalds } 18051da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_GINFO: 18061da177e4SLinus Torvalds return snd_timer_user_ginfo(file, argp); 18071da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_GPARAMS: 18081da177e4SLinus Torvalds return snd_timer_user_gparams(file, argp); 18091da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_GSTATUS: 18101da177e4SLinus Torvalds return snd_timer_user_gstatus(file, argp); 18111da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_SELECT: 18121da177e4SLinus Torvalds return snd_timer_user_tselect(file, argp); 18131da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_INFO: 18141da177e4SLinus Torvalds return snd_timer_user_info(file, argp); 18151da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_PARAMS: 18161da177e4SLinus Torvalds return snd_timer_user_params(file, argp); 18171da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_STATUS: 18181da177e4SLinus Torvalds return snd_timer_user_status(file, argp); 18191da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_START: 18208c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_START_OLD: 18211da177e4SLinus Torvalds return snd_timer_user_start(file); 18221da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_STOP: 18238c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_STOP_OLD: 18241da177e4SLinus Torvalds return snd_timer_user_stop(file); 18251da177e4SLinus Torvalds case SNDRV_TIMER_IOCTL_CONTINUE: 18268c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_CONTINUE_OLD: 18271da177e4SLinus Torvalds return snd_timer_user_continue(file); 182815790a6bSTakashi Iwai case SNDRV_TIMER_IOCTL_PAUSE: 18298c50b37cSTakashi Iwai case SNDRV_TIMER_IOCTL_PAUSE_OLD: 183015790a6bSTakashi Iwai return snd_timer_user_pause(file); 18311da177e4SLinus Torvalds } 18321da177e4SLinus Torvalds return -ENOTTY; 18331da177e4SLinus Torvalds } 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds static int snd_timer_user_fasync(int fd, struct file * file, int on) 18361da177e4SLinus Torvalds { 183753d2f744STakashi Iwai struct snd_timer_user *tu; 18381da177e4SLinus Torvalds 18391da177e4SLinus Torvalds tu = file->private_data; 184060aa4924SJonathan Corbet return fasync_helper(fd, file, on, &tu->fasync); 18411da177e4SLinus Torvalds } 18421da177e4SLinus Torvalds 18436b172a85SClemens Ladisch static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, 18446b172a85SClemens Ladisch size_t count, loff_t *offset) 18451da177e4SLinus Torvalds { 184653d2f744STakashi Iwai struct snd_timer_user *tu; 18471da177e4SLinus Torvalds long result = 0, unit; 18481da177e4SLinus Torvalds int err = 0; 18491da177e4SLinus Torvalds 18501da177e4SLinus Torvalds tu = file->private_data; 185153d2f744STakashi Iwai unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); 18521da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 18531da177e4SLinus Torvalds while ((long)count - result >= unit) { 18541da177e4SLinus Torvalds while (!tu->qused) { 18551da177e4SLinus Torvalds wait_queue_t wait; 18561da177e4SLinus Torvalds 18571da177e4SLinus Torvalds if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { 18581da177e4SLinus Torvalds err = -EAGAIN; 18591da177e4SLinus Torvalds break; 18601da177e4SLinus Torvalds } 18611da177e4SLinus Torvalds 18621da177e4SLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 18631da177e4SLinus Torvalds init_waitqueue_entry(&wait, current); 18641da177e4SLinus Torvalds add_wait_queue(&tu->qchange_sleep, &wait); 18651da177e4SLinus Torvalds 18661da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 18671da177e4SLinus Torvalds schedule(); 18681da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds remove_wait_queue(&tu->qchange_sleep, &wait); 18711da177e4SLinus Torvalds 18721da177e4SLinus Torvalds if (signal_pending(current)) { 18731da177e4SLinus Torvalds err = -ERESTARTSYS; 18741da177e4SLinus Torvalds break; 18751da177e4SLinus Torvalds } 18761da177e4SLinus Torvalds } 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 18791da177e4SLinus Torvalds if (err < 0) 18801da177e4SLinus Torvalds goto _error; 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds if (tu->tread) { 18836b172a85SClemens Ladisch if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], 188453d2f744STakashi Iwai sizeof(struct snd_timer_tread))) { 18851da177e4SLinus Torvalds err = -EFAULT; 18861da177e4SLinus Torvalds goto _error; 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds } else { 18896b172a85SClemens Ladisch if (copy_to_user(buffer, &tu->queue[tu->qhead++], 189053d2f744STakashi Iwai sizeof(struct snd_timer_read))) { 18911da177e4SLinus Torvalds err = -EFAULT; 18921da177e4SLinus Torvalds goto _error; 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds } 18951da177e4SLinus Torvalds 18961da177e4SLinus Torvalds tu->qhead %= tu->queue_size; 18971da177e4SLinus Torvalds 18981da177e4SLinus Torvalds result += unit; 18991da177e4SLinus Torvalds buffer += unit; 19001da177e4SLinus Torvalds 19011da177e4SLinus Torvalds spin_lock_irq(&tu->qlock); 19021da177e4SLinus Torvalds tu->qused--; 19031da177e4SLinus Torvalds } 19041da177e4SLinus Torvalds spin_unlock_irq(&tu->qlock); 19051da177e4SLinus Torvalds _error: 19061da177e4SLinus Torvalds return result > 0 ? result : err; 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds 19091da177e4SLinus Torvalds static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) 19101da177e4SLinus Torvalds { 19111da177e4SLinus Torvalds unsigned int mask; 191253d2f744STakashi Iwai struct snd_timer_user *tu; 19131da177e4SLinus Torvalds 19141da177e4SLinus Torvalds tu = file->private_data; 19151da177e4SLinus Torvalds 19161da177e4SLinus Torvalds poll_wait(file, &tu->qchange_sleep, wait); 19171da177e4SLinus Torvalds 19181da177e4SLinus Torvalds mask = 0; 19191da177e4SLinus Torvalds if (tu->qused) 19201da177e4SLinus Torvalds mask |= POLLIN | POLLRDNORM; 19211da177e4SLinus Torvalds 19221da177e4SLinus Torvalds return mask; 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds 19251da177e4SLinus Torvalds #ifdef CONFIG_COMPAT 19261da177e4SLinus Torvalds #include "timer_compat.c" 19271da177e4SLinus Torvalds #else 19281da177e4SLinus Torvalds #define snd_timer_user_ioctl_compat NULL 19291da177e4SLinus Torvalds #endif 19301da177e4SLinus Torvalds 19319c2e08c5SArjan van de Ven static const struct file_operations snd_timer_f_ops = 19321da177e4SLinus Torvalds { 19331da177e4SLinus Torvalds .owner = THIS_MODULE, 19341da177e4SLinus Torvalds .read = snd_timer_user_read, 19351da177e4SLinus Torvalds .open = snd_timer_user_open, 19361da177e4SLinus Torvalds .release = snd_timer_user_release, 193702f4865fSTakashi Iwai .llseek = no_llseek, 19381da177e4SLinus Torvalds .poll = snd_timer_user_poll, 19391da177e4SLinus Torvalds .unlocked_ioctl = snd_timer_user_ioctl, 19401da177e4SLinus Torvalds .compat_ioctl = snd_timer_user_ioctl_compat, 19411da177e4SLinus Torvalds .fasync = snd_timer_user_fasync, 19421da177e4SLinus Torvalds }; 19431da177e4SLinus Torvalds 19441da177e4SLinus Torvalds /* 19451da177e4SLinus Torvalds * ENTRY functions 19461da177e4SLinus Torvalds */ 19471da177e4SLinus Torvalds 19481da177e4SLinus Torvalds static int __init alsa_timer_init(void) 19491da177e4SLinus Torvalds { 19501da177e4SLinus Torvalds int err; 19511da177e4SLinus Torvalds 19521da177e4SLinus Torvalds #ifdef SNDRV_OSS_INFO_DEV_TIMERS 19536b172a85SClemens Ladisch snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, 19546b172a85SClemens Ladisch "system timer"); 19551da177e4SLinus Torvalds #endif 1956e28563ccSTakashi Iwai 19571da177e4SLinus Torvalds if ((err = snd_timer_register_system()) < 0) 19586b172a85SClemens Ladisch snd_printk(KERN_ERR "unable to register system timer (%i)\n", 19596b172a85SClemens Ladisch err); 1960f87135f5SClemens Ladisch if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, 1961f87135f5SClemens Ladisch &snd_timer_f_ops, NULL, "timer")) < 0) 19626b172a85SClemens Ladisch snd_printk(KERN_ERR "unable to register timer device (%i)\n", 19636b172a85SClemens Ladisch err); 1964e28563ccSTakashi Iwai snd_timer_proc_init(); 19651da177e4SLinus Torvalds return 0; 19661da177e4SLinus Torvalds } 19671da177e4SLinus Torvalds 19681da177e4SLinus Torvalds static void __exit alsa_timer_exit(void) 19691da177e4SLinus Torvalds { 19701da177e4SLinus Torvalds struct list_head *p, *n; 19711da177e4SLinus Torvalds 19721da177e4SLinus Torvalds snd_unregister_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0); 19731da177e4SLinus Torvalds /* unregister the system timer */ 19741da177e4SLinus Torvalds list_for_each_safe(p, n, &snd_timer_list) { 197553d2f744STakashi Iwai struct snd_timer *timer = list_entry(p, struct snd_timer, device_list); 1976c461482cSTakashi Iwai snd_timer_free(timer); 19771da177e4SLinus Torvalds } 1978e28563ccSTakashi Iwai snd_timer_proc_done(); 19791da177e4SLinus Torvalds #ifdef SNDRV_OSS_INFO_DEV_TIMERS 19801da177e4SLinus Torvalds snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); 19811da177e4SLinus Torvalds #endif 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds module_init(alsa_timer_init) 19851da177e4SLinus Torvalds module_exit(alsa_timer_exit) 19861da177e4SLinus Torvalds 19871da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_open); 19881da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_close); 19891da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_resolution); 19901da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_start); 19911da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_stop); 19921da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_continue); 19931da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_pause); 19941da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_new); 19951da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_notify); 19961da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_global_new); 19971da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_global_free); 19981da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_global_register); 19991da177e4SLinus Torvalds EXPORT_SYMBOL(snd_timer_interrupt); 2000