snd_cmipci_write_b
snd_cmipci_write_b(cm, CM_REG_EXT_MISC, 0x20); /* magic */
snd_cmipci_write_b(cm, CM_REG_EXT_MISC + 1, 0x09); /* more magic */
snd_cmipci_write_b(cm, reg, rate>>8);
snd_cmipci_write_b(cm, reg, rate&0xff);