PORT_PVCR
__raw_writew(0x0142, PORT_PVCR); /* 00 00 00 01 01 00 00 10 */
data = __raw_readw(PORT_PVCR);
__raw_writew((data & 0xfc03), PORT_PVCR);
data = __raw_readw(PORT_PVCR);
__raw_writew((data & 0xffc3), PORT_PVCR);