SD_CMD3
SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));