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Diffstat (limited to 'drivers/media/video/saa7134/saa7134-oss.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-oss.c174
1 files changed, 100 insertions, 74 deletions
diff --git a/drivers/media/video/saa7134/saa7134-oss.c b/drivers/media/video/saa7134/saa7134-oss.c
index fd9ed11ab1e2..8badd2a9cb2f 100644
--- a/drivers/media/video/saa7134/saa7134-oss.c
+++ b/drivers/media/video/saa7134/saa7134-oss.c
@@ -782,36 +782,36 @@ struct file_operations saa7134_mixer_fops = {
static irqreturn_t saa7134_oss_irq(int irq, void *dev_id, struct pt_regs *regs)
{
- struct saa7134_dmasound *dmasound = dev_id;
- struct saa7134_dev *dev = dmasound->priv_data;
- unsigned long report, status;
- int loop, handled = 0;
-
- for (loop = 0; loop < 10; loop++) {
- report = saa_readl(SAA7134_IRQ_REPORT);
- status = saa_readl(SAA7134_IRQ_STATUS);
-
- if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
- handled = 1;
- saa_writel(SAA7134_IRQ_REPORT,report);
- saa7134_irq_oss_done(dev, status);
- } else {
- goto out;
- }
- }
-
- if (loop == 10) {
- dprintk("error! looping IRQ!");
- }
+ struct saa7134_dmasound *dmasound = dev_id;
+ struct saa7134_dev *dev = dmasound->priv_data;
+ unsigned long report, status;
+ int loop, handled = 0;
+
+ for (loop = 0; loop < 10; loop++) {
+ report = saa_readl(SAA7134_IRQ_REPORT);
+ status = saa_readl(SAA7134_IRQ_STATUS);
+
+ if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
+ handled = 1;
+ saa_writel(SAA7134_IRQ_REPORT,report);
+ saa7134_irq_oss_done(dev, status);
+ } else {
+ goto out;
+ }
+ }
+
+ if (loop == 10) {
+ dprintk("error! looping IRQ!");
+ }
out:
- return IRQ_RETVAL(handled);
+ return IRQ_RETVAL(handled);
}
int saa7134_oss_init1(struct saa7134_dev *dev)
{
- if ((request_irq(dev->pci->irq, saa7134_oss_irq,
- SA_SHIRQ | SA_INTERRUPT, dev->name,
+ if ((request_irq(dev->pci->irq, saa7134_oss_irq,
+ SA_SHIRQ | SA_INTERRUPT, dev->name,
(void*) &dev->dmasound)) < 0)
return -1;
@@ -899,94 +899,120 @@ void saa7134_irq_oss_done(struct saa7134_dev *dev, unsigned long status)
spin_unlock(&dev->slock);
}
-int saa7134_dsp_create(struct saa7134_dev *dev)
+static int saa7134_dsp_create(struct saa7134_dev *dev)
{
int err;
- err = dev->dmasound.minor_dsp =
- register_sound_dsp(&saa7134_dsp_fops,
- dsp_nr[dev->nr]);
- if (err < 0) {
- goto fail;
- }
- printk(KERN_INFO "%s: registered device dsp%d\n",
- dev->name,dev->dmasound.minor_dsp >> 4);
-
- err = dev->dmasound.minor_mixer =
- register_sound_mixer(&saa7134_mixer_fops,
- mixer_nr[dev->nr]);
- if (err < 0)
- goto fail;
- printk(KERN_INFO "%s: registered device mixer%d\n",
- dev->name,dev->dmasound.minor_mixer >> 4);
+ err = dev->dmasound.minor_dsp =
+ register_sound_dsp(&saa7134_dsp_fops,
+ dsp_nr[dev->nr]);
+ if (err < 0) {
+ goto fail;
+ }
+ printk(KERN_INFO "%s: registered device dsp%d\n",
+ dev->name,dev->dmasound.minor_dsp >> 4);
+
+ err = dev->dmasound.minor_mixer =
+ register_sound_mixer(&saa7134_mixer_fops,
+ mixer_nr[dev->nr]);
+ if (err < 0)
+ goto fail;
+ printk(KERN_INFO "%s: registered device mixer%d\n",
+ dev->name,dev->dmasound.minor_mixer >> 4);
return 0;
fail:
- unregister_sound_dsp(dev->dmasound.minor_dsp);
+ unregister_sound_dsp(dev->dmasound.minor_dsp);
return 0;
}
+static int oss_device_init(struct saa7134_dev *dev)
+{
+ dev->dmasound.priv_data = dev;
+ saa7134_oss_init1(dev);
+ saa7134_dsp_create(dev);
+ return 1;
+}
+
+static int oss_device_exit(struct saa7134_dev *dev)
+{
+
+ unregister_sound_mixer(dev->dmasound.minor_mixer);
+ unregister_sound_dsp(dev->dmasound.minor_dsp);
+
+ saa7134_oss_fini(dev);
+
+ if (dev->pci->irq > 0) {
+ synchronize_irq(dev->pci->irq);
+ free_irq(dev->pci->irq,&dev->dmasound);
+ }
+
+ dev->dmasound.priv_data = NULL;
+ return 1;
+}
+
static int saa7134_oss_init(void)
{
- struct saa7134_dev *dev = NULL;
- struct list_head *list;
+ struct saa7134_dev *dev = NULL;
+ struct list_head *list;
+
+ if (!dmasound_init && !dmasound_exit) {
+ dmasound_init = oss_device_init;
+ dmasound_exit = oss_device_exit;
+ } else {
+ printk(KERN_WARNING "saa7134 OSS: can't load, DMA sound handler already assigned (probably to ALSA)\n");
+ return -EBUSY;
+ }
- printk(KERN_INFO "saa7134 OSS driver for DMA sound loaded\n");
+ printk(KERN_INFO "saa7134 OSS driver for DMA sound loaded\n");
- list_for_each(list,&saa7134_devlist) {
- dev = list_entry(list, struct saa7134_dev, devlist);
+
+ list_for_each(list,&saa7134_devlist) {
+ dev = list_entry(list, struct saa7134_dev, devlist);
if (dev->dmasound.priv_data == NULL) {
- dev->dmasound.priv_data = dev;
- saa7134_oss_init1(dev);
- saa7134_dsp_create(dev);
+ oss_device_init(dev);
} else {
- printk(KERN_ERR "saa7134 OSS: DMA sound is being handled by ALSA, ignoring %s\n",dev->name);
+ printk(KERN_ERR "saa7134 OSS: DMA sound is being handled by ALSA, ignoring %s\n",dev->name);
return -EBUSY;
}
- }
+ }
- if (dev == NULL)
- printk(KERN_INFO "saa7134 OSS: no saa7134 cards found\n");
+ if (dev == NULL)
+ printk(KERN_INFO "saa7134 OSS: no saa7134 cards found\n");
- return 0;
+ return 0;
}
-void saa7134_oss_exit(void)
+static void saa7134_oss_exit(void)
{
- struct saa7134_dev *dev = NULL;
- struct list_head *list;
+ struct saa7134_dev *dev = NULL;
+ struct list_head *list;
- list_for_each(list,&saa7134_devlist) {
- dev = list_entry(list, struct saa7134_dev, devlist);
+ list_for_each(list,&saa7134_devlist) {
+ dev = list_entry(list, struct saa7134_dev, devlist);
/* Device isn't registered by OSS, probably ALSA's */
if (!dev->dmasound.minor_dsp)
continue;
- unregister_sound_mixer(dev->dmasound.minor_mixer);
- unregister_sound_dsp(dev->dmasound.minor_dsp);
+ oss_device_exit(dev);
- saa7134_oss_fini(dev);
-
- if (dev->pci->irq > 0) {
- synchronize_irq(dev->pci->irq);
- free_irq(dev->pci->irq,&dev->dmasound);
- }
-
- dev->dmasound.priv_data = NULL;
+ }
- }
+ dmasound_init = NULL;
+ dmasound_exit = NULL;
- printk(KERN_INFO "saa7134 OSS driver for DMA sound unloaded\n");
+ printk(KERN_INFO "saa7134 OSS driver for DMA sound unloaded\n");
- return;
+ return;
}
-module_init(saa7134_oss_init);
+/* We initialize this late, to make sure the sound system is up and running */
+late_initcall(saa7134_oss_init);
module_exit(saa7134_oss_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.