#undef DEBUG
-#include <linux/version.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/ac97_codec.h>
+#include <linux/mutex.h>
+
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
* 0 = no VRA, 1 = use VRA if codec supports it
*/
static int vra = 1;
-MODULE_PARM(vra, "i");
+module_param(vra, bool, 0);
MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
static struct au1550_state {
int no_vra; /* do not use VRA */
spinlock_t lock;
- struct semaphore open_sem;
- struct semaphore sem;
+ struct mutex open_mutex;
+ struct mutex sem;
mode_t open_mode;
wait_queue_head_t open_wait;
/* Wait for Transmit Busy to show disabled.
*/
do {
- stat = readl((void *)PSC_AC97STAT);
+ stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_TB) != 0);
/* Wait for Receive Busy to show disabled.
*/
do {
- stat = readl((void *)PSC_AC97STAT);
+ stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_RB) != 0);
/* Wait for Device ready.
*/
do {
- stat = readl((void *)PSC_AC97STAT);
+ stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_DR) == 0);
}
/* Wait for Device ready.
*/
do {
- stat = readl((void *)PSC_AC97STAT);
+ stat = au_readl(PSC_AC97STAT);
au_sync();
} while ((stat & PSC_AC97STAT_DR) == 0);
}
+/* Hold spinlock for both start_dac() and start_adc() calls */
static void
start_dac(struct au1550_state *s)
{
struct dmabuf *db = &s->dma_dac;
- unsigned long flags;
if (!db->stopped)
return;
- spin_lock_irqsave(&s->lock, flags);
-
set_xmit_slots(db->num_channels);
au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
au_sync();
au1xxx_dbdma_start(db->dmanr);
db->stopped = 0;
-
- spin_unlock_irqrestore(&s->lock, flags);
}
static void
}
-/* hold spinlock for the following */
static void
dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct dmabuf *db = &s->dma_dac;
u32 ac97c_stat;
+ spin_lock(&s->lock);
+
ac97c_stat = au_readl(PSC_AC97STAT);
if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
/* wake up anybody listening */
if (waitqueue_active(&db->wait))
wake_up(&db->wait);
+
+ spin_unlock(&s->lock);
}
u32 obytes;
char *obuf;
+ spin_lock(&s->lock);
+
/* Pull the buffer from the dma queue.
*/
au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
if ((dp->count + obytes) > dp->dmasize) {
/* Overrun. Stop ADC and log the error
*/
+ spin_unlock(&s->lock);
stop_adc(s);
dp->error++;
err("adc overrun");
if (waitqueue_active(&dp->wait))
wake_up(&dp->wait);
+ spin_unlock(&s->lock);
}
static loff_t
count *= db->cnt_factor;
- down(&s->sem);
+ mutex_lock(&s->sem);
add_wait_queue(&db->wait, &wait);
while (count > 0) {
/* wait for samples in ADC dma buffer
*/
do {
+ spin_lock_irqsave(&s->lock, flags);
if (db->stopped)
start_adc(s);
- spin_lock_irqsave(&s->lock, flags);
avail = db->count;
if (avail <= 0)
__set_current_state(TASK_INTERRUPTIBLE);
ret = -EAGAIN;
goto out;
}
- up(&s->sem);
+ mutex_unlock(&s->sem);
schedule();
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
goto out2;
}
- down(&s->sem);
+ mutex_lock(&s->sem);
}
} while (avail <= 0);
} /* while (count > 0) */
out:
- up(&s->sem);
+ mutex_unlock(&s->sem);
out2:
remove_wait_queue(&db->wait, &wait);
set_current_state(TASK_RUNNING);
count *= db->cnt_factor;
- down(&s->sem);
+ mutex_lock(&s->sem);
add_wait_queue(&db->wait, &wait);
while (count > 0) {
ret = -EAGAIN;
goto out;
}
- up(&s->sem);
+ mutex_unlock(&s->sem);
schedule();
if (signal_pending(current)) {
if (!ret)
ret = -ERESTARTSYS;
goto out2;
}
- down(&s->sem);
+ mutex_lock(&s->sem);
}
} while (avail <= 0);
} /* while (count > 0) */
out:
- up(&s->sem);
+ mutex_unlock(&s->sem);
out2:
remove_wait_queue(&db->wait, &wait);
set_current_state(TASK_RUNNING);
int ret = 0;
lock_kernel();
- down(&s->sem);
+ mutex_lock(&s->sem);
if (vma->vm_flags & VM_WRITE)
db = &s->dma_dac;
else if (vma->vm_flags & VM_READ)
vma->vm_flags &= ~VM_IO;
db->mapped = 1;
out:
- up(&s->sem);
+ mutex_unlock(&s->sem);
unlock_kernel();
return ret;
}
if (get_user(val, (int *) arg))
return -EFAULT;
if (file->f_mode & FMODE_READ) {
- if (val & PCM_ENABLE_INPUT)
+ if (val & PCM_ENABLE_INPUT) {
+ spin_lock_irqsave(&s->lock, flags);
start_adc(s);
- else
+ spin_unlock_irqrestore(&s->lock, flags);
+ } else
stop_adc(s);
}
if (file->f_mode & FMODE_WRITE) {
- if (val & PCM_ENABLE_OUTPUT)
+ if (val & PCM_ENABLE_OUTPUT) {
+ spin_lock_irqsave(&s->lock, flags);
start_dac(s);
- else
+ spin_unlock_irqrestore(&s->lock, flags);
+ } else
stop_dac(s);
}
return 0;
file->private_data = s;
/* wait for device to become free */
- down(&s->open_sem);
+ mutex_lock(&s->open_mutex);
while (s->open_mode & file->f_mode) {
if (file->f_flags & O_NONBLOCK) {
- up(&s->open_sem);
+ mutex_unlock(&s->open_mutex);
return -EBUSY;
}
add_wait_queue(&s->open_wait, &wait);
__set_current_state(TASK_INTERRUPTIBLE);
- up(&s->open_sem);
+ mutex_unlock(&s->open_mutex);
schedule();
remove_wait_queue(&s->open_wait, &wait);
set_current_state(TASK_RUNNING);
if (signal_pending(current))
return -ERESTARTSYS;
- down(&s->open_sem);
+ mutex_lock(&s->open_mutex);
}
stop_dac(s);
}
s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
- up(&s->open_sem);
- init_MUTEX(&s->sem);
+ mutex_unlock(&s->open_mutex);
+ mutex_init(&s->sem);
return 0;
}
lock_kernel();
}
- down(&s->open_sem);
+ mutex_lock(&s->open_mutex);
if (file->f_mode & FMODE_WRITE) {
stop_dac(s);
kfree(s->dma_dac.rawbuf);
s->dma_adc.rawbuf = NULL;
}
s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
- up(&s->open_sem);
+ mutex_unlock(&s->open_mutex);
wake_up(&s->open_wait);
unlock_kernel();
return 0;
init_waitqueue_head(&s->dma_adc.wait);
init_waitqueue_head(&s->dma_dac.wait);
init_waitqueue_head(&s->open_wait);
- init_MUTEX(&s->open_sem);
+ mutex_init(&s->open_mutex);
spin_lock_init(&s->lock);
s->codec = ac97_alloc_codec();
/* Wait for PSC ready.
*/
do {
- val = readl((void *)PSC_AC97STAT);
+ val = au_readl(PSC_AC97STAT);
au_sync();
} while ((val & PSC_AC97STAT_SR) == 0);
/* Wait for Device ready.
*/
do {
- val = readl((void *)PSC_AC97STAT);
+ val = au_readl(PSC_AC97STAT);
au_sync();
} while ((val & PSC_AC97STAT_DR) == 0);
git://git.onelab.eu / linux-2.6.git / blobdiff