Hardware
/
litedram
mirror of https://github.com/enjoy-digital/litedram.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

phy/gensdrphy: simplify commands and add dm support.

This commit is contained in:
Florent Kermarrec 2020-09-30 10:39:36 +02:00
parent b772bb54a7
commit 5d41cce080
1 changed files with 16 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
litedram/phy/gensdrphy.py
View File

@ -5,7 +5,7 @@
# Copyright (c) 2020 Antmicro <www.antmicro.com>
# SPDX-License-Identifier: BSD-2-Clause
# 1:1 frequency-ratio Generic SDR PHY
# 1:1, 1:2 frequency-ratio Generic SDR PHY
from migen import *
@ -52,16 +52,20 @@ class GENSDRPHY(Module):
for pads_group in range(len(pads.groups)):
pads.sel_group(pads_group)
# Addresses and Commands ---------------------------------------------------------------
self.specials += [SDROutput(i=dfi.p0.address[i], o=pads.a[i]) for i in range(len(pads.a))]
self.specials += [SDROutput(i=dfi.p0.bank[i], o=pads.ba[i]) for i in range(len(pads.ba))]
self.specials += SDROutput(i=dfi.p0.cas_n, o=pads.cas_n)
self.specials += SDROutput(i=dfi.p0.ras_n, o=pads.ras_n)
self.specials += SDROutput(i=dfi.p0.we_n, o=pads.we_n)
if hasattr(pads, "cke"):
self.specials += SDROutput(i=dfi.p0.cke, o=pads.cke)
if hasattr(pads, "cs_n"):
self.specials += SDROutput(i=dfi.p0.cs_n, o=pads.cs_n)
# Commands -----------------------------------------------------------------------------
commands = {
"a" : "address",
"ba" : "bank" ,
"ras_n": "ras_n" ,
"cas_n": "cas_n" ,
"we_n" : "we_n" ,
}
if hasattr(pads, "cke") : commands.update({"cke" : "cke"})
if hasattr(pads, "cs_n"): commands.update({"cs_n" : "cs_n"})
for pad_name, dfi_name in commands.items():
pad = getattr(pads, pad_name)
for i in range(len(pad)):
self.specials += SDROutput(i=getattr(dfi.p0, dfi_name)[i], o=pad[i])
# DQ/DM Data Path --------------------------------------------------------------------------
for i in range(len(pads.dq)):
@ -73,7 +77,7 @@ class GENSDRPHY(Module):
)
if hasattr(pads, "dm"):
for i in range(len(pads.dm)):
self.comb += pads.dm[i].eq(0) # FIXME
self.specials += SDROutput(i=dfi.p0.wrdata_en & dfi.p0.wrdata_mask[i], o=pads.dm[i])
# DQ/DM Control Path -----------------------------------------------------------------------
rddata_en = Signal(cl + cmd_latency)