DWC_MMC_CMD
MMC_WRITE(sc, DWC_MMC_CMD, cmd);
if (!(MMC_READ(sc, DWC_MMC_CMD) & DWC_MMC_CMD_START))
MMC_READ(sc, DWC_MMC_CMD));
MMC_WRITE(sc, DWC_MMC_CMD, cmdval | cmd->c_opcode);