#include <sound/initval.h>
#include <linux/kmod.h>
+/* internal flags */
+#define SNDRV_TIMER_IFLG_PAUSED 0x00010000
+
#if defined(CONFIG_SND_HRTIMER) || defined(CONFIG_SND_HRTIMER_MODULE)
#define DEFAULT_TIMER_LIMIT 4
#elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE)
struct timespec tstamp; /* trigger tstamp */
wait_queue_head_t qchange_sleep;
struct fasync_struct *fasync;
- struct mutex tread_sem;
+ struct mutex ioctl_lock;
};
/* list of timers */
slave->slave_id == master->slave_id) {
list_move_tail(&slave->open_list, &master->slave_list_head);
spin_lock_irq(&slave_active_lock);
+ spin_lock(&master->timer->lock);
slave->master = master;
slave->timer = master->timer;
if (slave->flags & SNDRV_TIMER_IFLG_RUNNING)
list_add_tail(&slave->active_list,
&master->slave_active_head);
+ spin_unlock(&master->timer->lock);
spin_unlock_irq(&slave_active_lock);
}
}
}
timeri->slave_class = tid->dev_sclass;
timeri->slave_id = slave_id;
- if (list_empty(&timer->open_list_head) && timer->hw.open)
- timer->hw.open(timer);
+
+ if (list_empty(&timer->open_list_head) && timer->hw.open) {
+ int err = timer->hw.open(timer);
+ if (err) {
+ kfree(timeri->owner);
+ kfree(timeri);
+
+ module_put(timer->module);
+ mutex_unlock(®ister_mutex);
+ return err;
+ }
+ }
+
list_add_tail(&timeri->open_list, &timer->open_list_head);
snd_timer_check_master(timeri);
mutex_unlock(®ister_mutex);
return 0;
}
-static int _snd_timer_stop(struct snd_timer_instance *timeri,
- int keep_flag, int event);
+static int _snd_timer_stop(struct snd_timer_instance *timeri, int event);
/*
* close a timer instance
if (snd_BUG_ON(!timeri))
return -ENXIO;
+ mutex_lock(®ister_mutex);
+ list_del(&timeri->open_list);
+
/* force to stop the timer */
snd_timer_stop(timeri);
- if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
- /* wait, until the active callback is finished */
- spin_lock_irq(&slave_active_lock);
- while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) {
- spin_unlock_irq(&slave_active_lock);
- udelay(10);
- spin_lock_irq(&slave_active_lock);
- }
- spin_unlock_irq(&slave_active_lock);
- mutex_lock(®ister_mutex);
- list_del(&timeri->open_list);
- mutex_unlock(®ister_mutex);
- } else {
- timer = timeri->timer;
- if (snd_BUG_ON(!timer))
- goto out;
+ timer = timeri->timer;
+ if (timer) {
/* wait, until the active callback is finished */
spin_lock_irq(&timer->lock);
while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) {
spin_lock_irq(&timer->lock);
}
spin_unlock_irq(&timer->lock);
- mutex_lock(®ister_mutex);
- list_del(&timeri->open_list);
- if (timer && list_empty(&timer->open_list_head) &&
- timer->hw.close)
- timer->hw.close(timer);
+
/* remove slave links */
+ spin_lock_irq(&slave_active_lock);
+ spin_lock(&timer->lock);
list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head,
open_list) {
- spin_lock_irq(&slave_active_lock);
- _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION);
list_move_tail(&slave->open_list, &snd_timer_slave_list);
slave->master = NULL;
slave->timer = NULL;
- spin_unlock_irq(&slave_active_lock);
+ list_del_init(&slave->ack_list);
+ list_del_init(&slave->active_list);
}
- mutex_unlock(®ister_mutex);
+ spin_unlock(&timer->lock);
+ spin_unlock_irq(&slave_active_lock);
+
+ /* slave doesn't need to release timer resources below */
+ if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
+ timer = NULL;
}
- out:
+
if (timeri->private_free)
timeri->private_free(timeri);
kfree(timeri->owner);
kfree(timeri);
- if (timer)
+
+ if (timer) {
+ if (list_empty(&timer->open_list_head) && timer->hw.close)
+ timer->hw.close(timer);
module_put(timer->module);
+ }
+
+ mutex_unlock(®ister_mutex);
return 0;
}
spin_lock_irqsave(&timer->lock, flags);
list_for_each_entry(ts, &ti->slave_active_head, active_list)
if (ts->ccallback)
- ts->ccallback(ti, event + 100, &tstamp, resolution);
+ ts->ccallback(ts, event + 100, &tstamp, resolution);
spin_unlock_irqrestore(&timer->lock, flags);
}
unsigned long flags;
spin_lock_irqsave(&slave_active_lock, flags);
+ if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) {
+ spin_unlock_irqrestore(&slave_active_lock, flags);
+ return -EBUSY;
+ }
timeri->flags |= SNDRV_TIMER_IFLG_RUNNING;
- if (timeri->master)
+ if (timeri->master && timeri->timer) {
+ spin_lock(&timeri->timer->lock);
list_add_tail(&timeri->active_list,
&timeri->master->slave_active_head);
+ spin_unlock(&timeri->timer->lock);
+ }
spin_unlock_irqrestore(&slave_active_lock, flags);
return 1; /* delayed start */
}
return -EINVAL;
if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
result = snd_timer_start_slave(timeri);
- snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
+ if (result >= 0)
+ snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
return result;
}
timer = timeri->timer;
if (timer == NULL)
return -EINVAL;
spin_lock_irqsave(&timer->lock, flags);
+ if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING |
+ SNDRV_TIMER_IFLG_START)) {
+ result = -EBUSY;
+ goto unlock;
+ }
timeri->ticks = timeri->cticks = ticks;
timeri->pticks = 0;
result = snd_timer_start1(timer, timeri, ticks);
+ unlock:
spin_unlock_irqrestore(&timer->lock, flags);
- snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
+ if (result >= 0)
+ snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
return result;
}
-static int _snd_timer_stop(struct snd_timer_instance * timeri,
- int keep_flag, int event)
+static int _snd_timer_stop(struct snd_timer_instance *timeri, int event)
{
struct snd_timer *timer;
unsigned long flags;
return -ENXIO;
if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
- if (!keep_flag) {
- spin_lock_irqsave(&slave_active_lock, flags);
- timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
+ spin_lock_irqsave(&slave_active_lock, flags);
+ if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) {
spin_unlock_irqrestore(&slave_active_lock, flags);
+ return -EBUSY;
}
+ if (timeri->timer)
+ spin_lock(&timeri->timer->lock);
+ timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
+ list_del_init(&timeri->ack_list);
+ list_del_init(&timeri->active_list);
+ if (timeri->timer)
+ spin_unlock(&timeri->timer->lock);
+ spin_unlock_irqrestore(&slave_active_lock, flags);
goto __end;
}
timer = timeri->timer;
if (!timer)
return -EINVAL;
spin_lock_irqsave(&timer->lock, flags);
+ if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING |
+ SNDRV_TIMER_IFLG_START))) {
+ spin_unlock_irqrestore(&timer->lock, flags);
+ return -EBUSY;
+ }
list_del_init(&timeri->ack_list);
list_del_init(&timeri->active_list);
if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) &&
}
}
}
- if (!keep_flag)
- timeri->flags &=
- ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START);
+ timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START);
+ if (event == SNDRV_TIMER_EVENT_STOP)
+ timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED;
+ else
+ timeri->flags |= SNDRV_TIMER_IFLG_PAUSED;
spin_unlock_irqrestore(&timer->lock, flags);
__end:
if (event != SNDRV_TIMER_EVENT_RESOLUTION)
unsigned long flags;
int err;
- err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP);
+ err = _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_STOP);
if (err < 0)
return err;
timer = timeri->timer;
if (timeri == NULL)
return result;
+ /* timer can continue only after pause */
+ if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED))
+ return -EINVAL;
+
if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE)
return snd_timer_start_slave(timeri);
timer = timeri->timer;
if (! timer)
return -EINVAL;
spin_lock_irqsave(&timer->lock, flags);
+ if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) {
+ result = -EBUSY;
+ goto unlock;
+ }
if (!timeri->cticks)
timeri->cticks = 1;
timeri->pticks = 0;
result = snd_timer_start1(timer, timeri, timer->sticks);
+ unlock:
spin_unlock_irqrestore(&timer->lock, flags);
snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE);
return result;
*/
int snd_timer_pause(struct snd_timer_instance * timeri)
{
- return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE);
+ return _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_PAUSE);
}
/*
ti->cticks = ti->ticks;
} else {
ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
- if (--timer->running)
- list_del(&ti->active_list);
+ --timer->running;
+ list_del_init(&ti->active_list);
}
if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||
(ti->flags & SNDRV_TIMER_IFLG_FAST))
timer->tmr_subdevice = tid->subdevice;
if (id)
strlcpy(timer->id, id, sizeof(timer->id));
+ timer->sticks = 1;
INIT_LIST_HEAD(&timer->device_list);
INIT_LIST_HEAD(&timer->open_list_head);
INIT_LIST_HEAD(&timer->active_list_head);
njiff += timer->sticks - priv->correction;
priv->correction = 0;
}
- priv->last_expires = priv->tlist.expires = njiff;
- add_timer(&priv->tlist);
+ priv->last_expires = njiff;
+ mod_timer(&priv->tlist, njiff);
return 0;
}
tu->tstamp = *tstamp;
if ((tu->filter & (1 << event)) == 0 || !tu->tread)
return;
+ memset(&r1, 0, sizeof(r1));
r1.event = event;
r1.tstamp = *tstamp;
r1.val = resolution;
}
if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
tu->last_resolution != resolution) {
+ memset(&r1, 0, sizeof(r1));
r1.event = SNDRV_TIMER_EVENT_RESOLUTION;
r1.tstamp = tstamp;
r1.val = resolution;
return -ENOMEM;
spin_lock_init(&tu->qlock);
init_waitqueue_head(&tu->qchange_sleep);
- mutex_init(&tu->tread_sem);
+ mutex_init(&tu->ioctl_lock);
tu->ticks = 1;
tu->queue_size = 128;
tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
if (file->private_data) {
tu = file->private_data;
file->private_data = NULL;
+ mutex_lock(&tu->ioctl_lock);
if (tu->timeri)
snd_timer_close(tu->timeri);
+ mutex_unlock(&tu->ioctl_lock);
kfree(tu->queue);
kfree(tu->tqueue);
kfree(tu);
int err = 0;
tu = file->private_data;
- mutex_lock(&tu->tread_sem);
if (tu->timeri) {
snd_timer_close(tu->timeri);
tu->timeri = NULL;
if (err < 0)
goto __err;
+ tu->qhead = tu->qtail = tu->qused = 0;
kfree(tu->queue);
tu->queue = NULL;
kfree(tu->tqueue);
}
__err:
- mutex_unlock(&tu->tread_sem);
return err;
}
return -EBADFD;
if (copy_from_user(¶ms, _params, sizeof(params)))
return -EFAULT;
- if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) {
- err = -EINVAL;
- goto _end;
+ if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) {
+ u64 resolution;
+
+ if (params.ticks < 1) {
+ err = -EINVAL;
+ goto _end;
+ }
+
+ /* Don't allow resolution less than 1ms */
+ resolution = snd_timer_resolution(tu->timeri);
+ resolution *= params.ticks;
+ if (resolution < 1000000) {
+ err = -EINVAL;
+ goto _end;
+ }
}
if (params.queue_size > 0 &&
(params.queue_size < 32 || params.queue_size > 1024)) {
if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) {
if (tu->tread) {
struct snd_timer_tread tread;
+ memset(&tread, 0, sizeof(tread));
tread.event = SNDRV_TIMER_EVENT_EARLY;
tread.tstamp.tv_sec = 0;
tread.tstamp.tv_nsec = 0;
tu = file->private_data;
if (!tu->timeri)
return -EBADFD;
+ /* start timer instead of continue if it's not used before */
+ if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED))
+ return snd_timer_user_start(file);
tu->timeri->lost = 0;
return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0;
}
SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23),
};
-static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
+static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct snd_timer_user *tu;
{
int xarg;
- mutex_lock(&tu->tread_sem);
- if (tu->timeri) { /* too late */
- mutex_unlock(&tu->tread_sem);
+ if (tu->timeri) /* too late */
return -EBUSY;
- }
- if (get_user(xarg, p)) {
- mutex_unlock(&tu->tread_sem);
+ if (get_user(xarg, p))
return -EFAULT;
- }
tu->tread = xarg ? 1 : 0;
- mutex_unlock(&tu->tread_sem);
return 0;
}
case SNDRV_TIMER_IOCTL_GINFO:
return -ENOTTY;
}
+static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct snd_timer_user *tu = file->private_data;
+ long ret;
+
+ mutex_lock(&tu->ioctl_lock);
+ ret = __snd_timer_user_ioctl(file, cmd, arg);
+ mutex_unlock(&tu->ioctl_lock);
+ return ret;
+}
+
static int snd_timer_user_fasync(int fd, struct file * file, int on)
{
struct snd_timer_user *tu;
{
struct snd_timer_user *tu;
long result = 0, unit;
+ int qhead;
int err = 0;
tu = file->private_data;
unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read);
+ mutex_lock(&tu->ioctl_lock);
spin_lock_irq(&tu->qlock);
while ((long)count - result >= unit) {
while (!tu->qused) {
if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
err = -EAGAIN;
- break;
+ goto _error;
}
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&tu->qchange_sleep, &wait);
spin_unlock_irq(&tu->qlock);
+ mutex_unlock(&tu->ioctl_lock);
schedule();
+ mutex_lock(&tu->ioctl_lock);
spin_lock_irq(&tu->qlock);
remove_wait_queue(&tu->qchange_sleep, &wait);
if (signal_pending(current)) {
err = -ERESTARTSYS;
- break;
+ goto _error;
}
}
+ qhead = tu->qhead++;
+ tu->qhead %= tu->queue_size;
+ tu->qused--;
spin_unlock_irq(&tu->qlock);
- if (err < 0)
- goto _error;
if (tu->tread) {
- if (copy_to_user(buffer, &tu->tqueue[tu->qhead++],
- sizeof(struct snd_timer_tread))) {
+ if (copy_to_user(buffer, &tu->tqueue[qhead],
+ sizeof(struct snd_timer_tread)))
err = -EFAULT;
- goto _error;
- }
} else {
- if (copy_to_user(buffer, &tu->queue[tu->qhead++],
- sizeof(struct snd_timer_read))) {
+ if (copy_to_user(buffer, &tu->queue[qhead],
+ sizeof(struct snd_timer_read)))
err = -EFAULT;
- goto _error;
- }
}
- tu->qhead %= tu->queue_size;
-
+ spin_lock_irq(&tu->qlock);
+ if (err < 0)
+ goto _error;
result += unit;
buffer += unit;
-
- spin_lock_irq(&tu->qlock);
- tu->qused--;
}
- spin_unlock_irq(&tu->qlock);
_error:
+ spin_unlock_irq(&tu->qlock);
+ mutex_unlock(&tu->ioctl_lock);
return result > 0 ? result : err;
}