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dm6446 通过asp 外接 tlv320aic23 芯片 驱动移植

根据 dm6446 evm 裁剪的开发板 linux 2.6.18 移植aic23的驱动

声卡相关的启动信息

Advanced Linux Sound Architecture Driver Version 1.0.12rc1 (Thu Jun 22 13:55:50 2006 UTC).
ASoC version 0.13.1
AIC23 Audio Codec 0.1
asoc: tlv320aic23 <-> davinci-i2s mapping ok

这个说明声卡驱动已经注册成功了吧?

做简单的录音/播放测试 会有如下错误

root@192.168.1.203:/test# cat /dev/dsp >/test.wav
cat: /dev/dsp: Input/output error

root@192.168.1.203:/test# cat /readsun.wav >/dev/dsp
cat: write error: Input/output error

想问下是哪里出了问题...