[Patch 20/20] V4L (925) Saa7134 alsa is now a standalone module
From: mchehab
Date: Sun Nov 06 2005 - 22:16:50 EST
From: Ricardo Cerqueira <v4l@xxxxxxxxxxxxx>
- Saa7134-alsa is now a standalone module
Signed-off-by: Ricardo Cerqueira <v4l@xxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxx>
-----------------
drivers/media/video/saa7134/saa7134-alsa.c | 110 +++++++++++++++++++++++---
drivers/media/video/saa7134/saa7134-core.c | 29 ++++--
drivers/media/video/saa7134/saa7134-tvaudio.c | 3
drivers/media/video/saa7134/saa7134.h | 8 -
4 files changed, 121 insertions(+), 29 deletions(-)
--- hg.orig/drivers/media/video/saa7134/saa7134-alsa.c
+++ hg/drivers/media/video/saa7134/saa7134-alsa.c
@@ -1,6 +1,5 @@
/*
* SAA713x ALSA support for V4L
- * Ricardo Cerqueira <v4l@xxxxxxxxxxxxx>
*
*
* Caveats:
@@ -37,9 +36,13 @@
#include "saa7134.h"
#include "saa7134-reg.h"
-static unsigned int alsa_debug = 0;
-module_param(alsa_debug, int, 0644);
-MODULE_PARM_DESC(alsa_debug,"enable debug messages [alsa]");
+static unsigned int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
+
+unsigned int dsp_nr = 0;
+module_param(dsp_nr, int, 0444);
+MODULE_PARM_DESC(dsp_nr, "alsa device number");
/*
* Configuration macros
@@ -70,7 +73,7 @@ static int index[SNDRV_CARDS] = SNDRV_DE
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
-#define dprintk(fmt, arg...) if (alsa_debug) \
+#define dprintk(fmt, arg...) if (debug) \
printk(KERN_DEBUG "%s/alsa: " fmt, dev->name, ## arg)
@@ -110,6 +113,7 @@ typedef struct snd_card_saa7134_pcm {
static snd_card_t *snd_saa7134_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
+
/*
* saa7134 DMA audio stop
*
@@ -192,12 +196,11 @@ void saa7134_irq_alsa_done(struct saa713
/* next block addr */
next_blk = (dev->oss.dma_blk + 2) % dev->oss.blocks;
saa_writel(reg,next_blk * dev->oss.blksize);
- if (alsa_debug > 2)
+ if (debug > 2)
dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
(status & 0x10000000) ? "even" : "odd ", next_blk,
next_blk * dev->oss.blksize, dev->oss.blocks, dev->oss.blksize, dev->oss.read_count);
-
/* update status & wake waiting readers */
dev->oss.dma_blk = (dev->oss.dma_blk + 1) % dev->oss.blocks;
dev->oss.read_count += dev->oss.blksize;
@@ -215,6 +218,41 @@ void saa7134_irq_alsa_done(struct saa713
}
/*
+ * IRQ request handler
+ *
+ * Runs along with saa7134's IRQ handler, discards anything that isn't
+ * DMA sound
+ *
+ */
+
+static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct saa7134_dev *dev = (struct saa7134_dev*) dev_id;
+ 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_alsa_done(dev, status);
+ } else {
+ goto out;
+ }
+ }
+
+ if (loop == 10) {
+ dprintk("error! looping IRQ!");
+ }
+
+out:
+ return IRQ_RETVAL(handled);
+}
+
+/*
* ALSA capture trigger
*
* - One of the ALSA capture callbacks.
@@ -825,11 +863,9 @@ static int snd_saa7134_capsrc_put(snd_kc
saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
if (left || right) { // We've got data, turn the input on
- //saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL2, 0x101010);
saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
} else {
- //saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL2, 0x101010);
saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
}
@@ -892,9 +928,10 @@ static int snd_saa7134_dev_free(snd_devi
*
*/
-int alsa_card_saa7134_create(struct saa7134_dev *saadev, unsigned int devicenum)
+int alsa_card_saa7134_create (struct saa7134_dev *saadev, unsigned int devicenum)
{
static int dev;
+
snd_card_t *card;
snd_card_saa7134_t *chip;
int err;
@@ -902,6 +939,7 @@ int alsa_card_saa7134_create(struct saa7
.dev_free = snd_saa7134_dev_free,
};
+
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev])
@@ -909,6 +947,7 @@ int alsa_card_saa7134_create(struct saa7
if (devicenum) {
card = snd_card_new(devicenum, id[dev], THIS_MODULE, 0);
+ dsp_nr++;
} else {
card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
}
@@ -934,6 +973,15 @@ int alsa_card_saa7134_create(struct saa7
chip->irq = saadev->pci->irq;
chip->iobase = pci_resource_start(saadev->pci, 0);
+ err = request_irq(chip->pci->irq, saa7134_alsa_irq,
+ SA_SHIRQ | SA_INTERRUPT, saadev->name, saadev);
+
+ if (err < 0) {
+ printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
+ saadev->name, saadev->pci->irq);
+ return err;
+ }
+
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
snd_saa7134_free(chip);
return err;
@@ -966,10 +1014,48 @@ __nodev:
return err;
}
-void alsa_card_saa7134_exit(void)
+/*
+ * Module initializer
+ *
+ * Loops through present saa7134 cards, and assigns an ALSA device
+ * to each one
+ *
+ */
+
+static int saa7134_alsa_init(void)
+{
+ struct saa7134_dev *saadev = NULL;
+ struct list_head *list;
+
+ 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,dsp_nr);
+ }
+
+ if (saadev == NULL)
+ printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
+
+ return 0;
+
+}
+
+/*
+ * Module destructor
+ */
+
+void saa7134_alsa_exit(void)
{
int idx;
- for (idx = 0; idx < SNDRV_CARDS; idx++) {
+ for (idx = 0; idx < SNDRV_CARDS; idx++) {
snd_card_free(snd_saa7134_cards[idx]);
}
+ printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
+ return;
}
+
+module_init(saa7134_alsa_init);
+module_exit(saa7134_alsa_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ricardo Cerqueira");
--- hg.orig/drivers/media/video/saa7134/saa7134-core.c
+++ hg/drivers/media/video/saa7134/saa7134-core.c
@@ -574,6 +574,17 @@ static irqreturn_t saa7134_irq(int irq,
dev->name);
goto out;
}
+
+ /* If alsa support is active and we get a sound report, exit
+ and let the saa7134-alsa module deal with it */
+
+ if ((report & SAA7134_IRQ_REPORT_DONE_RA3) && alsa) {
+ if (irq_debug > 1)
+ printk(KERN_DEBUG "%s/irq: ignoring interrupt for ALSA\n",
+ dev->name);
+ goto out;
+ }
+
handled = 1;
saa_writel(SAA7134_IRQ_REPORT,report);
if (irq_debug)
@@ -598,8 +609,6 @@ static irqreturn_t saa7134_irq(int irq,
if ((report & SAA7134_IRQ_REPORT_DONE_RA3)) {
if (oss) {
saa7134_irq_oss_done(dev,status);
- } else if (alsa) {
- saa7134_irq_alsa_done(dev,status);
}
}
@@ -1029,9 +1038,7 @@ static int __devinit saa7134_initdev(str
printk(KERN_INFO "%s: registered device mixer%d\n",
dev->name,dev->oss.minor_mixer >> 4);
} else if (alsa) {
- alsa_card_saa7134_create(dev,dsp_nr[dev->nr]);
- printk(KERN_INFO "%s: registered ALSA devices\n",
- dev->name);
+ request_module("saa7134-alsa");
}
break;
}
@@ -1059,8 +1066,6 @@ static int __devinit saa7134_initdev(str
case PCI_DEVICE_ID_PHILIPS_SAA7135:
if (oss)
unregister_sound_dsp(dev->oss.minor_dsp);
- else if (alsa)
- alsa_card_saa7134_exit();
break;
}
fail4:
@@ -1120,8 +1125,7 @@ static void __devexit saa7134_finidev(st
if (oss) {
unregister_sound_mixer(dev->oss.minor_mixer);
unregister_sound_dsp(dev->oss.minor_dsp);
- } else if (alsa)
- alsa_card_saa7134_exit();
+ }
break;
}
saa7134_unregister_video(dev);
@@ -1214,6 +1218,13 @@ EXPORT_SYMBOL(saa7134_i2c_call_clients);
EXPORT_SYMBOL(saa7134_devlist);
EXPORT_SYMBOL(saa7134_boards);
+/* ----------------- For ALSA -------------------------------- */
+
+EXPORT_SYMBOL(saa7134_pgtable_free);
+EXPORT_SYMBOL(saa7134_pgtable_build);
+EXPORT_SYMBOL(saa7134_pgtable_alloc);
+EXPORT_SYMBOL(saa7134_set_dmabits);
+
/* ----------------------------------------------------------- */
/*
* Local variables:
--- hg.orig/drivers/media/video/saa7134/saa7134.h
+++ hg/drivers/media/video/saa7134/saa7134.h
@@ -665,14 +665,6 @@ void saa7134_input_fini(struct saa7134_d
void saa7134_input_irq(struct saa7134_dev *dev);
void saa7134_set_i2c_ir(struct saa7134_dev *dev, struct IR_i2c *ir);
-/* ----------------------------------------------------------- */
-/* saa7134-alsa.c */
-
-int alsa_card_saa7134_create(struct saa7134_dev *saadev, unsigned int devnum);
-void alsa_card_saa7134_exit(void);
-void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status);
-
-
/*
* Local variables:
* c-basic-offset: 8
--- hg.orig/drivers/media/video/saa7134/saa7134-tvaudio.c
+++ hg/drivers/media/video/saa7134/saa7134-tvaudio.c
@@ -1024,9 +1024,12 @@ int saa7134_tvaudio_do_scan(struct saa71
return 0;
}
+EXPORT_SYMBOL(saa_dsp_writel);
+
/* ----------------------------------------------------------- */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
+
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