Hi,

I have some issues with /dev/snd. First I should explain what I try to do.

I am developing a driver for TLV320AIC23B codec and want to use it on a AT91RM9200-based board.

I read documentation in sound/soc and created a codec driver (tlv320aic23b) and a machine driver (for my board). I think it's all I have to do since AT91 is supported and tlv320aic23b works with i2c and I2S.

When I load my module I obtain that output:

# modprobe snd-soc-armus-tlv320aic23b ASoC version 0.13.1 AIC23B Audio Codec 0.1 <6>asoc: aic23b <-> at91-ssc1 mapping ok <6>armus_tlv320aic23b: MCLK rate 12000000Hz armus_tlv320aic23b: Codec in Master Mode

(I activated debug in soc-core and in my machine driver (based mainly on eti_b1_wm8731 machine driver)).

I think there is no error here for now...

But there is no /dev/snd created. I don't know for now why... Maybe someone has an idea?

I think all I have in /proc/asound is correct too:

In /proc/asound I have this listing:

lrwxrwxrwx 1 root root 5 Jan 1 00:02 ARMUSTLV320AIC2 -> card0 dr-xr-xr-x 4 root root 0 Jan 1 00:02 card0 -r--r--r-- 1 root root 0 Jan 1 00:02 cards -r--r--r-- 1 root root 0 Jan 1 00:02 devices -r--r--r-- 1 root root 0 Jan 1 00:02 modules -r--r--r-- 1 root root 0 Jan 1 00:02 pcm -r--r--r-- 1 root root 0 Jan 1 00:02 timers -r--r--r-- 1 root root 0 Jan 1 00:02 version

cat cards:

0 [ARMUSTLV320AIC2]: aic23b - ARMUS_TLV320AIC23B ARMUS_TLV320AIC23B (aic23b)

cat devices:

0: [ 0] : control 16: [ 0- 0]: digital audio playback 24: [ 0- 0]: digital audio capture 33: : timer

cat modules:

0 snd_soc_tlv320aic23b

cat pcm:

00-00: TLV320AIC23B PCM aic23b-PCM-0 : : playback 1 : capture 1

cat timers:

G0: system timer : 7812.500us (10000000 ticks) P0-0-0: PCM playback 0-0-0 : SLAVE P0-0-1: PCM capture 0-0-1 : SLAVE

cat version (of alsa): Advanced Linux Sound Architecture Driver Version 1.0.15 (Tue Nov 20 19:16:42 2007 UTC).

My Linux Kernel version (uname -a): Linux uclibc 2.6.24 #32 PREEMPT Thu Aug 7 16:20:06 EDT 2008 armv4tl unknown.

When I try to use aplay it doesn't work. I have this error ouput from aplay:

ALSA lib confmisc.c:769:(parse_card) cannot find card '' ALSA lib conf.c:3510:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:3510:(_snd_config_evaluate) function snd_func_concat returned error: No such device ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name ALSA lib conf.c:3510:(_snd_config_evaluate) function snd_func_refer returned error: No such device ALSA lib conf.c:3982:(snd_config_expand) Evaluate error: No such device ALSA lib pcm.c:2144:(snd_pcm_open_noupdate) Unknown PCM default aplay: main:545: audio open error: No such device

I think it's because I have nothing in /dev/snd. I'm right?

Thank you,

Simon Tremblay