Hi<br>  I want to write a AC'97 sound driver for ARM cpu based ALSA. I<br>have seen &quot;writing an ALSA driver&quot; written by Takashi Iwai, but it<br>focuses mainly on the PCI soundcard. I don't find any source code for<br>ARM in ALSA driver.<br>  Who can give me any suggestion? Where can I find any open source<br>code of ac97 sound driver as reference? <br>Thanks!<br><br>Sudong<br><br>