Sata stack written in Verilog
Staus: TLDR Version: Demonstrated reading and writing to a hard drive on a Spartan 6 LX45T board
For a reference implementation here is a wishbone slave core used to verify the functionality of the SATA Stack:
https://github.com/CospanDesign/nysa-verilog/tree/master/verilog/wishbone/slave/wb_sata
More documentation can be found on the wiki
Most of the license is MIT but some of the licenses are GPL
Here is a link to a Spartan 6 LX45T Project
http://www.cospandesign.com/Projects/SATA/sata_build.zip
TODO: Fix Link layer... there is a small FIFO in there that is used to handle all starting and stopping of the read, it's a work around and needs to be fixed TODO: Fix Link layer so that it only instantiates one instance of the scrambler, not two
Code Organization:
rtl/
sata_stack.v (Top File that applications interface with)
sata_defines.v (Set defines for the stack in here)
generic/ (small modules used throughout the design)
blk_mem.v (wraps around an infered block memory generator)
cross_clock_enable.v (simple module that allows users to
send enables across a clock domain)
debounce.v (debounce)
ppfifo.v (ping pong FIFO, similar to a ping pong buffer
except the user doesn't need to track the
addresses)
command/
sata_command_layer.v (Sata Command Layer)
transport/
sata_transport_layer.v (Sata Transport Layer)
link/
sata_link_layer.v (Sata Link Layer)
sata_link_layer_read.v (Sata link layer read side)
sata_link_layer_write.v (Sata link layer write side)
scrambler.v (scrambles/descrambles primitives)
crc.v (Cyclical Redundancy Check/ creator)
cont_controller.v (controls the scrambling of primitives)
phy/
sata_phy_layer.v (Sata phy layer)
oob_controller.v (out of band controller)
platform/
sata_platform.v (This is a template file you can use to interface with the gigabit transceivers)
Soapbox:
Although I believe this code should be distributed for free and people should redistribute their software I leave the ethics up to the user and have licensesed most of the code as MIT but I did use some GPL cores and if the user desires to use this in their closed source project be warned about the GPL'ed modules in this stack.