txsibsf0_reg_read
reg = txsibsf0_reg_read(sa->sa_tc, UCB1200_ID_REG);
reg = txsibsf0_reg_read(sa->sa_tc, UCB1200_ID_REG);
reg = txsibsf0_reg_read(tc, i);
reg = txsibsf0_reg_read(tc, UCB1200_IO_DATA_REG);
txreg_t reg = txsibsf0_reg_read(tc, UCB1200_IO_DATA_REG);
dir = stat->dir = txsibsf0_reg_read(tc, UCB1200_IO_DIR_REG);
data = txsibsf0_reg_read(tc, UCB1200_IO_DATA_REG);
u_int16_t txsibsf0_reg_read(tx_chipset_tag_t, int);