shakti/m_class/sdmmc.mdwn

   1 ## SD/MMC (including eMMC)
   2
   3 * <http://bugs.libre-riscv.org/show_bug.cgi?id=7>
   4 * <https://opencores.org/project,sd_mmc_emulator>
   5 * (needs work) <https://opencores.org/project,sdcard_mass_storage_controller>
   6 * <https://github.com/enjoy-digital/litesdcard> - needs investigation
   7 * <https://github.com/lowRISC/lowrisc-chip/tree/ethernet-v0.5/src/main/verilog> - looks good.
   8 * <https://github.com/mczerski/SD-card-controller>
   9
  10 # Requirements
  11
  12 * eMMC 8-bit mode
  13 * SD/MMC 1, 2 and 4-bit mode
  14 * SPI compatible
  15 * Must be libre BSD or MIT Licensed (no restrictions, no non-free "non-commercial" clauses).
  16 * AXI interface preferred, Wishbone acceptable (bridge will be used).
  17 * Linux kernel driver needed (preferred).