AC97_CM9739_MULTI_CHAN
snd_ac97_update_bits(ac97, AC97_CM9739_MULTI_CHAN, 1 << 10,
snd_ac97_update_bits(ac97, AC97_CM9739_MULTI_CHAN, 0x3000,
val = snd_ac97_read(ac97, AC97_CM9739_MULTI_CHAN) & (1 << 4);
snd_ac97_write_cache(ac97, AC97_CM9739_MULTI_CHAN, val);
snd_ac97_write_cache(ac97, AC97_CM9739_MULTI_CHAN,
snd_ac97_read(ac97, AC97_CM9739_MULTI_CHAN) | (1 << 14));