MMC tools introduction

There is one MMC test tools called mmc-utils, which is maintained by Chris Ball, you can find it at the below public git repository:


The mmc-utils tools can do the following:

  • Print and parse extcsd data.
  • Determine the eMMC writeprotect status.
  • Set the eMMC writeprotect status.
  • Set the eMMC data sector size to 4KB by disabling emulation.
  • Create general purpose partition.
  • Enable the enhanced user area.
  • Enable write reliability per partition.
  • Print the response to STATUS_SEND (CMD13).
  • Enable the boot partition.
  • Set Boot Bus Conditions.
  • Enable the eMMC BKOPS feature.
  • Permanently enable the eMMC H/W Reset feature.
  • Permanently disable the eMMC H/W Reset feature.
  • Send Sanitize command.
  • Program authentication key for the device.
  • Counter value for the rpmb device will be read to stdout.
  • Read from rpmb device to output.
  • Write to rpmb device from data file.
  • Enable the eMMC cache feature.
  • Disable the eMMC cache feature.
  • Print and parse CID data.
  • Print and parse CSD data.
  • Print and parse SCR data.