From: Jan Niehusmann <jan@gondor.com>
To: linux-sound@vger.kernel.org
Subject: cmpci spdif in/out
Date: Mon, 29 May 2000 23:44:20 +0000 [thread overview]
Message-ID: <marc-linux-sound-95964476831040@msgid-missing> (raw)
I didn't read this list until yesterday, so I don't know if something
similar has been discussed here.
The patch below enables S/PDIF input and output on cmi8338 soundcards.
It's against the current 3.21 cmpci driver from www.cmedia.com.tw.
(lupo@aitek.it provides patches to make it work with 2.3.99-kernels
on http://web.tiscalinet.it/luvassu)
Unfortunately it doesn't give perfect results - a file piped through
an spdif channel shows lost bytes, duplicated bytes and random corruption.
This corruption can hardly be heard, but I think spidif should allow
perfect transfers.
Any ideas?
Jan
--- linux/drivers/sound/cmpci.c.orig Mon May 29 15:29:40 2000
+++ linux/drivers/sound/cmpci.c Mon May 29 18:03:47 2000
@@ -62,6 +62,7 @@
* Add support for modem, S/PDIF loop and 4 channels.
* (8738 only)
* Fix bug cause x11amp cannot play.
+ * 29.05.00 Added support for S/PDIF in/out (jan@gondor.com)
*
* 28.05.00 Patches for kernel 2.4 compliance (lupo@aitek.it)
*/
@@ -2984,11 +2403,17 @@
#ifdef MODULE
int spdif_loop = 0;
+int spdif_in = 1;
+int spdif_out = 1;
+int spdif_32 = 0;
int four_ch = 0;
int rear_out = 0;
int modem = 0;
int joystick = 0;
MODULE_PARM(spdif_loop, "i");
+MODULE_PARM(spdif_in, "i");
+MODULE_PARM(spdif_out, "i");
+MODULE_PARM(spdif_32, "i");
MODULE_PARM(four_ch, "i");
MODULE_PARM(rear_out, "i");
MODULE_PARM(modem, "i");
@@ -2999,6 +2424,15 @@
#ifdef CONFIG_SOUND_CMPCI_SPDIFLOOP
int spdif_loop = 1;
#endif
+#ifdef CONFIG_SOUND_CMPCI_SPDIFIN
+int spdif_in = 1;
+#endif
+#ifdef CONFIG_SOUND_CMPCI_SPDIFOUT
+int spdif_out = 1;
+#endif
+#ifdef CONFIG_SOUND_CMPCI_SPDIF32
+int spdif_32 = 1;
+#endif
#ifdef CONFIG_SOUND_CMPCI_4CH
int four_ch = 1;
#endif
@@ -3158,15 +2584,6 @@
outb(inb((s->iobase + CODEC_CMI_MISC_CTRL) | 0x80) & ~0x40, s->iobase + CODEC_CMI_MISC_CTRL);
printk(KERN_INFO "cm: modem function supported\n");
}
- /* enable SPDIF loop */
- if (spdif_loop)
- {
- /* turn on spdif-in to spdif-out */
- outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) | 0x80, s->iobase + CODEC_CMI_FUNCTRL1);
- printk(KERN_INFO "cm: Enable SPDIF loop\n");
- }
- else
- outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) & ~0x80, s->iobase + CODEC_CMI_FUNCTRL1);
/* enable 4 channels mode */
if (four_ch)
{
@@ -3188,6 +2605,41 @@
else
outb(inb(s->iobase + CODEC_CMI_MISC_CTRL + 3) & ~0x04, s->iobase + CODEC_CMI_MISC_CTRL + 3);
}
+ /* enable SPDIF loop */
+ if (spdif_loop)
+ {
+ /* turn on spdif-in to spdif-out */
+ outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) | 0x80, s->iobase + CODEC_CMI_FUNCTRL1);
+ printk(KERN_INFO "cm: Enable SPDIF loop\n");
+ }
+ else
+ outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) & ~0x80, s->iobase + CODEC_CMI_FUNCTRL1);
+ /* enable SPDIF 32-bit-mode (untested) */
+ if (spdif_32)
+ {
+ /* turn on 32 bit (SPD32SEL) */
+ outb(inb(s->iobase + CODEC_CMI_MISC_CTRL + 2) | 0x20, s->iobase + CODEC_CMI_MISC_CTRL + 2);
+ printk(KERN_INFO "cm: Enable SPDIF32 \n");
+ }
+ else
+ outb(inb(s->iobase + CODEC_CMI_MISC_CTRL + 2) & ~0x20, s->iobase + CODEC_CMI_MISC_CTRL + 2);
+ /* enable SPDIF in */
+ if (spdif_in)
+ {
+ /* turn on spdif in */
+ outb(inb(s->iobase + CODEC_CMI_FUNCTRL1 + 1) | 0x02, s->iobase + CODEC_CMI_FUNCTRL1 + 1);
+ printk(KERN_INFO "cm: Enable SPDIF in \n");
+ }
+ else
+ outb(inb(s->iobase + CODEC_CMI_FUNCTRL1 + 1) & ~0x02, s->iobase + CODEC_CMI_FUNCTRL1 + 1);
+ if (spdif_out)
+ {
+ /* turn on spdif out */
+ outb(inb(s->iobase + CODEC_CMI_FUNCTRL1 + 1) | 0x01, s->iobase + CODEC_CMI_FUNCTRL1 + 1);
+ printk(KERN_INFO "cm: Enable SPDIF out \n");
+ }
+ else
+ outb(inb(s->iobase + CODEC_CMI_FUNCTRL1 + 1) & ~0x01, s->iobase + CODEC_CMI_FUNCTRL1 + 1);
/* enable joystick */
if (joystick)
outb(inb(s->iobase + CODEC_CMI_FUNCTRL1) | 0x02, s->iobase + CODEC_CMI_FUNCTRL1);
--- linux/drivers/sound/Config.in.orig Fri May 12 03:30:14 2000
+++ linux/drivers/sound/Config.in Mon May 29 15:32:11 2000
@@ -12,6 +12,11 @@
dep_tristate ' C-Media PCI (CMI8338/8378)' CONFIG_SOUND_CMPCI $CONFIG_SOUND
if [ "$CONFIG_SOUND_CMPCI" = "y" -o "$CONFIG_SOUND_CMPCI" = "m" ]; then
bool ' Enable S/PDIF loop for CMI8738' CONFIG_SOUND_CMPCI_SPDIFLOOP
+ bool ' Enable S/PDIF in for CMI8738' CONFIG_SOUND_CMPCI_SPDIFIN
+ bool ' Enable S/PDIF out for CMI8738' CONFIG_SOUND_CMPCI_SPDIFOUT
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ bool ' Enable S/PDIF 32bit-mode for CMI8738' CONFIG_SOUND_CMPCI_SPDIF32
+ fi
bool ' Enable 4 channel mode for CMI8738' CONFIG_SOUND_CMPCI_4CH
if [ "$CONFIG_SOUND_CMPCI_4CH" = "y" ]; then
bool ' Separate rear out jack' CONFIG_SOUND_CMPCI_REAR
reply other threads:[~2000-05-29 23:44 UTC|newest]
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