README.md

nysa-sdio-device

SDIO device stack written in Verilog

Status: TLDR Version: Still designing and writing verilog cores

Designed to interface with SDIO Hosts. The associate Linux driver is at: https://github.com/CospanDesign/nysa-sdio-linux-driver

Code Organization:

rtl/ sdio_stack.v (Top File that applications interface with) sdio_defines.v (Set defines for the stack are here)

generic/ (Small modules that are used throughout the code are here)
  crc7.v (7-bit CRC Generator)
  crc16.v (16-bit CRC Generator)

control/ (SDIO Card Controller)
  sdio_card_control.v

cia/ (Common Information Area)
  sdio_cia.v  (This is where the SDIO card gets configured and contains
                information for the host)
  sdio_cccr.v (Card Common Control Register)
  sdio_csi.v  (Card Information Structure)
  sdio_fbr.v  (Function Basic Registers)

function/ (Function templates are here, use the function template to write
          your own interface)
  sdio_function_template.v

phy/ (Physical level interface, these toggle the pins for both the command
      and data lines)
  sdio_phy.v (Main phy interface, all other phys are called through here)
  sdio_phy_sd_1_bit.v (1 data bit used with SD protocol)
  sdio_phy_sd_4_bit.v (4 data bits used with SD protocol)
  sdio_phy_spi.v      (SPI based interface on SD protocol)

functions/ nysa_host_interface/ sdio_host_interface.v (SDIO Function that is a nysa host interface) sdio_host_interface_defines.v (Defines)

sim/ sdio_host/ sdio_host.v (Used to exercise the sdio_device stack, this will eventually become it's own repo)