IG4_DATA_COMMAND_RD
last = IG4_DATA_RESTART | IG4_DATA_COMMAND_RD;
last = IG4_DATA_COMMAND_RD;
reg_write(sc, IG4_REG_DATA_CMD, IG4_DATA_COMMAND_RD |
reg_write(sc, IG4_REG_DATA_CMD, IG4_DATA_COMMAND_RD);