SXIMMC_CMD
MMC_WRITE(sc, SXIMMC_CMD, cmdval | cmd->c_opcode);
MMC_WRITE(sc, SXIMMC_CMD, cmd);
if (!(MMC_READ(sc, SXIMMC_CMD) & SXIMMC_CMD_START))
printf("CMD: 0x%08x\n", MMC_READ(sc, SXIMMC_CMD));
MMC_WRITE(sc, SXIMMC_CMD, cmdval | cmd->c_opcode);
MMC_WRITE(sc, SXIMMC_CMD, cmdval | cmd->c_opcode);