if (snd_nm256_acquire_irq(chip) < 0) return -EBUSY;
snd_nm256_capture_open(snd_pcm_substream_t *substream){	nm256_t *chip = snd_pcm_substream_chip(substream);	snd_nm256_setup_stream(chip, &chip->streams[SNDRV_PCM_STREAM_CAPTURE],			       substream, &snd_nm256_capture);	return 0;}