MMC_SEND_OP_COND
mmcio->cmd.opcode = MMC_SEND_OP_COND; /* CMD 1 */
cmd.opcode = MMC_SEND_OP_COND;
case MMC_SEND_OP_COND:
IS_CMD(MMC_SEND_OP_COND, opcode, flags)) {