aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/saa7134/saa7134-oss.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/saa7134/saa7134-oss.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-oss.c161
1 files changed, 149 insertions, 12 deletions
diff --git a/drivers/media/video/saa7134/saa7134-oss.c b/drivers/media/video/saa7134/saa7134-oss.c
index fd53dfcc1644..fd9ed11ab1e2 100644
--- a/drivers/media/video/saa7134/saa7134-oss.c
+++ b/drivers/media/video/saa7134/saa7134-oss.c
@@ -4,6 +4,8 @@
* oss dsp interface
*
* (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
+ * 2005 conversion to standalone module:
+ * Ricardo Cerqueira <v4l@cerqueira.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -25,7 +27,9 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
+#include <linux/interrupt.h>
#include <linux/slab.h>
+#include <linux/sound.h>
#include <linux/soundcard.h>
#include "saa7134-reg.h"
@@ -33,15 +37,23 @@
/* ------------------------------------------------------------------ */
-static unsigned int oss_debug = 0;
-module_param(oss_debug, int, 0644);
-MODULE_PARM_DESC(oss_debug,"enable debug messages [oss]");
+static unsigned int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,"enable debug messages [oss]");
-static unsigned int oss_rate = 0;
-module_param(oss_rate, int, 0444);
-MODULE_PARM_DESC(oss_rate,"sample rate (valid are: 32000,48000)");
+static unsigned int rate = 0;
+module_param(rate, int, 0444);
+MODULE_PARM_DESC(rate,"sample rate (valid are: 32000,48000)");
-#define dprintk(fmt, arg...) if (oss_debug) \
+static unsigned int dsp_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
+MODULE_PARM_DESC(dsp_nr, "device numbers for SAA7134 capture interface(s).");
+module_param_array(dsp_nr, int, NULL, 0444);
+
+static unsigned int mixer_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
+MODULE_PARM_DESC(mixer_nr, "mixer numbers for SAA7134 capture interface(s).");
+module_param_array(mixer_nr, int, NULL, 0444);
+
+#define dprintk(fmt, arg...) if (debug) \
printk(KERN_DEBUG "%s/oss: " fmt, dev->name , ## arg)
@@ -369,7 +381,7 @@ static int dsp_ioctl(struct inode *inode, struct file *file,
int __user *p = argp;
int val = 0;
- if (oss_debug > 1)
+ if (debug > 1)
saa7134_print_ioctl(dev->name,cmd);
switch (cmd) {
case OSS_GETVERSION:
@@ -665,7 +677,7 @@ static int mixer_ioctl(struct inode *inode, struct file *file,
void __user *argp = (void __user *) arg;
int __user *p = argp;
- if (oss_debug > 1)
+ if (debug > 1)
saa7134_print_ioctl(dev->name,cmd);
switch (cmd) {
case OSS_GETVERSION:
@@ -768,8 +780,41 @@ 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!");
+ }
+out:
+ 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,
+ (void*) &dev->dmasound)) < 0)
+ return -1;
+
/* general */
init_MUTEX(&dev->dmasound.lock);
init_waitqueue_head(&dev->dmasound.wq);
@@ -785,8 +830,8 @@ int saa7134_oss_init1(struct saa7134_dev *dev)
/* dsp */
dev->dmasound.rate = 32000;
- if (oss_rate)
- dev->dmasound.rate = oss_rate;
+ if (rate)
+ dev->dmasound.rate = rate;
dev->dmasound.rate = (dev->dmasound.rate > 40000) ? 48000 : 32000;
/* mixer */
@@ -840,7 +885,7 @@ void saa7134_irq_oss_done(struct saa7134_dev *dev, unsigned long status)
/* next block addr */
next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
saa_writel(reg,next_blk * dev->dmasound.blksize);
- if (oss_debug > 2)
+ if (debug > 2)
dprintk("irq: ok, %s, next_blk=%d, addr=%x\n",
(status & 0x10000000) ? "even" : "odd ", next_blk,
next_blk * dev->dmasound.blksize);
@@ -854,6 +899,98 @@ void saa7134_irq_oss_done(struct saa7134_dev *dev, unsigned long status)
spin_unlock(&dev->slock);
}
+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);
+
+ return 0;
+
+fail:
+ unregister_sound_dsp(dev->dmasound.minor_dsp);
+ return 0;
+
+
+}
+
+static int saa7134_oss_init(void)
+{
+ struct saa7134_dev *dev = NULL;
+ struct list_head *list;
+
+ 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);
+ if (dev->dmasound.priv_data == NULL) {
+ dev->dmasound.priv_data = dev;
+ saa7134_oss_init1(dev);
+ saa7134_dsp_create(dev);
+ } else {
+ 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");
+
+ return 0;
+
+}
+
+void saa7134_oss_exit(void)
+{
+ struct saa7134_dev *dev = NULL;
+ struct list_head *list;
+
+ 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);
+
+ 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;
+
+ }
+
+ printk(KERN_INFO "saa7134 OSS driver for DMA sound unloaded\n");
+
+ return;
+}
+
+module_init(saa7134_oss_init);
+module_exit(saa7134_oss_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
+
/* ----------------------------------------------------------- */
/*
* Local variables:
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.