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path: root/drivers/media/video/saa7134/saa7134-alsa.c
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Diffstat (limited to 'drivers/media/video/saa7134/saa7134-alsa.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-alsa.c130
1 files changed, 66 insertions, 64 deletions
diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index 0025191f616..289ca3ac99b 100644
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -71,7 +71,7 @@ typedef struct snd_card_saa7134 {
int mixer_volume[MIXER_ADDR_LAST+1][2];
int capture_source[MIXER_ADDR_LAST+1][2];
struct pci_dev *pci;
- struct saa7134_dev *saadev;
+ struct saa7134_dev *dev;
unsigned long iobase;
int irq;
@@ -86,12 +86,10 @@ typedef struct snd_card_saa7134 {
*/
typedef struct snd_card_saa7134_pcm {
- struct saa7134_dev *saadev;
+ struct saa7134_dev *dev;
spinlock_t lock;
- unsigned int pcm_size; /* buffer size */
- unsigned int pcm_count; /* bytes per period */
- unsigned int pcm_bps; /* bytes per second */
+
snd_pcm_substream_t *substream;
} snd_card_saa7134_pcm_t;
@@ -193,6 +191,7 @@ void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status)
snd_pcm_period_elapsed(dev->dmasound.substream);
spin_lock(&dev->slock);
}
+
done:
spin_unlock(&dev->slock);
@@ -208,8 +207,9 @@ void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status)
static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
{
- snd_card_saa7134_t *saa7134 = dev_id;
- struct saa7134_dev *dev = saa7134->saadev;
+ struct saa7134_dmasound *dmasound = dev_id;
+ struct saa7134_dev *dev = dmasound->priv_data;
+
unsigned long report, status;
int loop, handled = 0;
@@ -248,8 +248,8 @@ static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
int cmd)
{
snd_pcm_runtime_t *runtime = substream->runtime;
- snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
- struct saa7134_dev *dev=saapcm->saadev;
+ snd_card_saa7134_pcm_t *pcm = runtime->private_data;
+ struct saa7134_dev *dev=pcm->dev;
int err = 0;
spin_lock_irq(&dev->slock);
@@ -315,8 +315,8 @@ static int dsp_buffer_init(struct saa7134_dev *dev)
{
int err;
- if (!dev->dmasound.bufsize)
- BUG();
+ BUG_ON(!dev->dmasound.bufsize);
+
videobuf_dma_init(&dev->dmasound.dma);
err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
(dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
@@ -344,28 +344,18 @@ static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
u32 fmt, control;
snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
struct saa7134_dev *dev;
- snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
- unsigned int bps;
+ snd_card_saa7134_pcm_t *pcm = runtime->private_data;
unsigned long size;
unsigned count;
size = snd_pcm_lib_buffer_bytes(substream);
count = snd_pcm_lib_period_bytes(substream);
- saapcm->saadev->dmasound.substream = substream;
- bps = runtime->rate * runtime->channels;
- bps *= snd_pcm_format_width(runtime->format);
- bps /= 8;
- if (bps <= 0)
- return -EINVAL;
- saapcm->pcm_bps = bps;
- saapcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
- saapcm->pcm_count = snd_pcm_lib_period_bytes(substream);
-
+ pcm->dev->dmasound.substream = substream;
- dev=saa7134->saadev;
+ dev=saa7134->dev;
- dsp_buffer_conf(dev,saapcm->pcm_count,(saapcm->pcm_size/saapcm->pcm_count));
+ dsp_buffer_conf(dev,count,(size/count));
err = dsp_buffer_init(dev);
if (0 != err)
@@ -445,7 +435,6 @@ static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
fmt |= 0x04;
saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
- //saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210);
break;
}
@@ -496,10 +485,8 @@ static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
- snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
- struct saa7134_dev *dev=saapcm->saadev;
-
-
+ snd_card_saa7134_pcm_t *pcm = runtime->private_data;
+ struct saa7134_dev *dev=pcm->dev;
if (dev->dmasound.read_count) {
dev->dmasound.read_count -= snd_pcm_lib_period_bytes(substream);
@@ -540,9 +527,9 @@ static snd_pcm_hardware_t snd_card_saa7134_capture =
static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
{
- snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
+ snd_card_saa7134_pcm_t *pcm = runtime->private_data;
- kfree(saapcm);
+ kfree(pcm);
}
@@ -571,7 +558,7 @@ static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
*
* Called after closing the device, but before snd_card_saa7134_capture_close
* Usually used in ALSA to free the DMA, but since we don't use the
- * ALSA DMA I'm almost sure this isn't necessary.
+ * ALSA DMA it does nothing
*
*/
@@ -614,7 +601,7 @@ static int dsp_buffer_free(struct saa7134_dev *dev)
static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
{
snd_card_saa7134_t *chip = snd_pcm_substream_chip(substream);
- struct saa7134_dev *dev = chip->saadev;
+ struct saa7134_dev *dev = chip->dev;
/* unlock buffer */
saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
@@ -637,29 +624,28 @@ static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
- snd_card_saa7134_pcm_t *saapcm;
+ snd_card_saa7134_pcm_t *pcm;
snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
- struct saa7134_dev *dev = saa7134->saadev;
+ struct saa7134_dev *dev = saa7134->dev;
int err;
down(&dev->dmasound.lock);
- dev->dmasound.afmt = SNDRV_PCM_FORMAT_U8;
- dev->dmasound.channels = 2;
dev->dmasound.read_count = 0;
dev->dmasound.read_offset = 0;
up(&dev->dmasound.lock);
- saapcm = kzalloc(sizeof(*saapcm), GFP_KERNEL);
- if (saapcm == NULL)
+ pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
+ if (pcm == NULL)
return -ENOMEM;
- saapcm->saadev=saa7134->saadev;
- spin_lock_init(&saapcm->lock);
+ pcm->dev=saa7134->dev;
+
+ spin_lock_init(&pcm->lock);
- saapcm->substream = substream;
- runtime->private_data = saapcm;
+ pcm->substream = substream;
+ runtime->private_data = pcm;
runtime->private_free = snd_card_saa7134_runtime_free;
runtime->hw = snd_card_saa7134_capture;
@@ -782,6 +768,7 @@ static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_
ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
spin_unlock_irqrestore(&chip->mixer_lock, flags);
+
return 0;
}
@@ -794,7 +781,7 @@ static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_
int analog_io, rate;
struct saa7134_dev *dev;
- dev = chip->saadev;
+ dev = chip->dev;
left = ucontrol->value.integer.value[0] & 1;
right = ucontrol->value.integer.value[1] & 1;
@@ -904,11 +891,16 @@ static int snd_saa7134_dev_free(snd_device_t *device)
{
snd_card_saa7134_t *chip = device->device_data;
+ if (chip->dev->dmasound.priv_data == NULL)
+ return 0;
+
if (chip->irq >= 0) {
synchronize_irq(chip->irq);
- free_irq(chip->irq, (void *) chip);
+ free_irq(chip->irq, &chip->dev->dmasound);
}
+ chip->dev->dmasound.priv_data = NULL;
+
return 0;
}
@@ -920,7 +912,7 @@ static int snd_saa7134_dev_free(snd_device_t *device)
*
*/
-int alsa_card_saa7134_create(struct saa7134_dev *saadev, int dev)
+int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
{
snd_card_t *card;
@@ -931,12 +923,12 @@ int alsa_card_saa7134_create(struct saa7134_dev *saadev, int dev)
};
- if (dev >= SNDRV_CARDS)
+ if (devnum >= SNDRV_CARDS)
return -ENODEV;
- if (!enable[dev])
+ if (!enable[devnum])
return -ENODEV;
- card = snd_card_new(index[dev], id[dev], THIS_MODULE, sizeof(snd_card_saa7134_t));
+ card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
if (card == NULL)
return -ENOMEM;
@@ -951,23 +943,27 @@ int alsa_card_saa7134_create(struct saa7134_dev *saadev, int dev)
spin_lock_init(&chip->lock);
spin_lock_init(&chip->mixer_lock);
- chip->saadev = saadev;
+ chip->dev = dev;
chip->card = card;
- chip->pci = saadev->pci;
- chip->irq = saadev->pci->irq;
- chip->iobase = pci_resource_start(saadev->pci, 0);
+ chip->pci = dev->pci;
+ chip->irq = dev->pci->irq;
+ chip->iobase = pci_resource_start(dev->pci, 0);
+
- err = request_irq(saadev->pci->irq, saa7134_alsa_irq,
- SA_SHIRQ | SA_INTERRUPT, saadev->name, (void *)chip);
+ err = request_irq(dev->pci->irq, saa7134_alsa_irq,
+ SA_SHIRQ | SA_INTERRUPT, dev->name,
+ (void*) &dev->dmasound);
if (err < 0) {
printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
- saadev->name, saadev->pci->irq);
+ dev->name, dev->pci->irq);
goto __nodev;
}
+ init_MUTEX(&dev->dmasound.lock);
+
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
goto __nodev;
}
@@ -984,10 +980,10 @@ int alsa_card_saa7134_create(struct saa7134_dev *saadev, int dev)
strcpy(card->shortname, "SAA7134");
sprintf(card->longname, "%s at 0x%lx irq %d",
- chip->saadev->name, chip->iobase, chip->irq);
+ chip->dev->name, chip->iobase, chip->irq);
if ((err = snd_card_register(card)) == 0) {
- snd_saa7134_cards[dev] = card;
+ snd_saa7134_cards[devnum] = card;
return 0;
}
@@ -1006,7 +1002,7 @@ __nodev:
static int saa7134_alsa_init(void)
{
- struct saa7134_dev *saadev = NULL;
+ struct saa7134_dev *dev = NULL;
struct list_head *list;
position = 0;
@@ -1014,12 +1010,18 @@ static int saa7134_alsa_init(void)
printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
list_for_each(list,&saa7134_devlist) {
- saadev = list_entry(list, struct saa7134_dev, devlist);
- alsa_card_saa7134_create(saadev,position);
- position++;
+ dev = list_entry(list, struct saa7134_dev, devlist);
+ if (dev->dmasound.priv_data == NULL) {
+ dev->dmasound.priv_data = dev;
+ alsa_card_saa7134_create(dev,position);
+ position++;
+ } else {
+ printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
+ return -EBUSY;
+ }
}
- if (saadev == NULL)
+ if (dev == NULL)
printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-09 17:51:11 +0000