tinyriscv-openocd/contrib/loaders/flash/fpga/xilinx_bscan_spi.py

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#!/usr/bin/python3
#
# Copyright (C) 2015 Robert Jordens <jordens@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
from migen import *
from migen.build.generic_platform import *
from migen.build import xilinx
"""
This migen script produces proxy bitstreams to allow programming SPI flashes
behind FPGAs.
Bitstream binaries built with this script are available at:
https://github.com/jordens/bscan_spi_bitstreams
JTAG signalling is connected directly to SPI signalling. CS_N is
asserted when the JTAG IR contains the USER1 instruction and the state is
SHIFT-DR. Xilinx bscan cells sample TDO on falling TCK and forward it.
MISO requires sampling on rising CLK and leads to one cycle of latency.
https://github.com/m-labs/migen
"""
class Spartan3(Module):
macro = "BSCAN_SPARTAN3"
toolchain = "ise"
def __init__(self, platform):
platform.toolchain.bitgen_opt += " -g compress -g UnusedPin:Pullup"
self.clock_domains.cd_jtag = ClockDomain(reset_less=True)
spi = platform.request("spiflash")
shift = Signal()
tdo = Signal()
sel1 = Signal()
self.comb += [
self.cd_jtag.clk.eq(spi.clk),
spi.cs_n.eq(~shift | ~sel1),
]
self.sync.jtag += tdo.eq(spi.miso)
self.specials += Instance(self.macro,
o_DRCK1=spi.clk, o_SHIFT=shift,
o_TDI=spi.mosi, i_TDO1=tdo, i_TDO2=0,
o_SEL1=sel1)
class Spartan3A(Spartan3):
macro = "BSCAN_SPARTAN3A"
class Spartan6(Module):
toolchain = "ise"
def __init__(self, platform):
platform.toolchain.bitgen_opt += " -g compress -g UnusedPin:Pullup"
self.clock_domains.cd_jtag = ClockDomain(reset_less=True)
spi = platform.request("spiflash")
shift = Signal()
tdo = Signal()
sel = Signal()
self.comb += self.cd_jtag.clk.eq(spi.clk), spi.cs_n.eq(~shift | ~sel)
self.sync.jtag += tdo.eq(spi.miso)
self.specials += Instance("BSCAN_SPARTAN6", p_JTAG_CHAIN=1,
o_TCK=spi.clk, o_SHIFT=shift, o_SEL=sel,
o_TDI=spi.mosi, i_TDO=tdo)
class Series7(Module):
toolchain = "vivado"
def __init__(self, platform):
platform.toolchain.bitstream_commands.extend([
"set_property BITSTREAM.GENERAL.COMPRESS True [current_design]",
"set_property BITSTREAM.CONFIG.UNUSEDPIN Pullnone [current_design]",
])
self.clock_domains.cd_jtag = ClockDomain(reset_less=True)
spi = platform.request("spiflash")
clk = Signal()
shift = Signal()
tdo = Signal()
sel = Signal()
self.comb += self.cd_jtag.clk.eq(clk), spi.cs_n.eq(~shift | ~sel)
self.sync.jtag += tdo.eq(spi.miso)
self.specials += Instance("BSCANE2", p_JTAG_CHAIN=1,
o_SHIFT=shift, o_TCK=clk, o_SEL=sel,
o_TDI=spi.mosi, i_TDO=tdo)
self.specials += Instance("STARTUPE2", i_CLK=0, i_GSR=0, i_GTS=0,
i_KEYCLEARB=0, i_PACK=1, i_USRCCLKO=clk,
i_USRCCLKTS=0, i_USRDONEO=1, i_USRDONETS=1)
class XilinxBscanSpi(xilinx.XilinxPlatform):
packages = {
# (package-speedgrade, id): [cs_n, clk, mosi, miso, *pullups]
("cp132", 1): ["M2", "N12", "N2", "N8"],
("fg320", 1): ["U3", "U16", "T4", "N10"],
("fg320", 2): ["V3", "U16", "T11", "V16"],
("fg484", 1): ["Y4", "AA20", "AB14", "AB20"],
("fgg484", 1): ["Y4", "AA20", "AB14", "AB20"],
("fgg400", 1): ["Y2", "Y19", "W12", "W18"],
("ftg256", 1): ["T2", "R14", "P10", "T14"],
("ft256", 1): ["T2", "R14", "P10", "T14"],
("fg400", 1): ["Y2", "Y19", "W12", "W18"],
("cs484", 1): ["U7", "V17", "V13", "W17"],
("qg144-2", 1): ["P38", "P70", "P64", "P65", "P62", "P61"],
("cpg196-2", 1): ["P2", "N13", "P11", "N11", "N10", "P10"],
("cpg236-1", 1): ["K19", None, "D18", "D19", "G18", "F18"],
("csg484-2", 1): ["AB5", "W17", "AB17", "Y17", "V13", "W13"],
("csg324-2", 1): ["V3", "R15", "T13", "R13", "T14", "V14"],
("csg324-1", 1): ["L13", None, "K17", "K18", "L14", "M14"],
("fbg484-1", 1): ["T19", None, "P22", "R22", "P21", "R21"],
("fbg484-1", 2): ["L16", None, "H18", "H19", "G18", "F19"],
("fbg676-1", 1): ["C23", None, "B24", "A25", "B22", "A22"],
("ffg901-1", 1): ["V26", None, "R30", "T30", "R28", "T28"],
("ffg1156-1", 1): ["V30", None, "AA33", "AA34", "Y33", "Y34"],
("ffg1157-1", 1): ["AL33", None, "AN33", "AN34", "AK34", "AL34"],
("ffg1158-1", 1): ["C24", None, "A23", "A24", "B26", "A26"],
("ffg1926-1", 1): ["AK33", None, "AN34", "AN35", "AJ34", "AK34"],
("fhg1761-1", 1): ["AL36", None, "AM36", "AN36", "AJ36", "AJ37"],
("flg1155-1", 1): ["AL28", None, "AE28", "AF28", "AJ29", "AJ30"],
("flg1932-1", 1): ["V32", None, "T33", "R33", "U31", "T31"],
("flg1926-1", 1): ["AK33", None, "AN34", "AN35", "AJ34", "AK34"],
}
pinouts = {
# bitstreams are named by die, package does not matter, speed grade
# should not matter.
#
# chip: (package, id, standard, class)
"xc3s100e": ("cp132", 1, "LVCMOS33", Spartan3),
"xc3s1200e": ("fg320", 1, "LVCMOS33", Spartan3),
"xc3s1400a": ("fg484", 1, "LVCMOS33", Spartan3A),
"xc3s1400an": ("fgg484", 1, "LVCMOS33", Spartan3A),
"xc3s1600e": ("fg320", 1, "LVCMOS33", Spartan3),
"xc3s200a": ("fg320", 2, "LVCMOS33", Spartan3A),
"xc3s200an": ("ftg256", 1, "LVCMOS33", Spartan3A),
"xc3s250e": ("cp132", 1, "LVCMOS33", Spartan3),
"xc3s400a": ("fg320", 2, "LVCMOS33", Spartan3A),
"xc3s400an": ("fgg400", 1, "LVCMOS33", Spartan3A),
"xc3s500e": ("cp132", 1, "LVCMOS33", Spartan3),
"xc3s50a": ("ft256", 1, "LVCMOS33", Spartan3A),
"xc3s50an": ("ftg256", 1, "LVCMOS33", Spartan3A),
"xc3s700a": ("fg400", 1, "LVCMOS33", Spartan3A),
"xc3s700an": ("fgg484", 1, "LVCMOS33", Spartan3A),
"xc3sd1800a": ("cs484", 1, "LVCMOS33", Spartan3A),
"xc3sd3400a": ("cs484", 1, "LVCMOS33", Spartan3A),
"xc6slx100": ("csg484-2", 1, "LVCMOS33", Spartan6),
"xc6slx100t": ("csg484-2", 1, "LVCMOS33", Spartan6),
"xc6slx150": ("csg484-2", 1, "LVCMOS33", Spartan6),
"xc6slx150t": ("csg484-2", 1, "LVCMOS33", Spartan6),
"xc6slx16": ("cpg196-2", 1, "LVCMOS33", Spartan6),
"xc6slx25": ("csg324-2", 1, "LVCMOS33", Spartan6),
"xc6slx25t": ("csg324-2", 1, "LVCMOS33", Spartan6),
"xc6slx45": ("csg324-2", 1, "LVCMOS33", Spartan6),
"xc6slx45t": ("csg324-2", 1, "LVCMOS33", Spartan6),
"xc6slx4": ("cpg196-2", 1, "LVCMOS33", Spartan6),
"xc6slx4t": ("qg144-2", 1, "LVCMOS33", Spartan6),
"xc6slx75": ("csg484-2", 1, "LVCMOS33", Spartan6),
"xc6slx75t": ("csg484-2", 1, "LVCMOS33", Spartan6),
"xc6slx9": ("cpg196-2", 1, "LVCMOS33", Spartan6),
"xc6slx9t": ("qg144-2", 1, "LVCMOS33", Spartan6),
"xc7a100t": ("csg324-1", 1, "LVCMOS25", Series7),
"xc7a15t": ("cpg236-1", 1, "LVCMOS25", Series7),
"xc7a200t": ("fbg484-1", 1, "LVCMOS25", Series7),
"xc7a35t": ("cpg236-1", 1, "LVCMOS25", Series7),
"xc7a50t": ("cpg236-1", 1, "LVCMOS25", Series7),
"xc7a75t": ("csg324-1", 1, "LVCMOS25", Series7),
"xc7k160t": ("fbg484-1", 2, "LVCMOS25", Series7),
"xc7k325t": ("fbg676-1", 1, "LVCMOS25", Series7),
"xc7k355t": ("ffg901-1", 1, "LVCMOS25", Series7),
"xc7k410t": ("fbg676-1", 1, "LVCMOS25", Series7),
"xc7k420t": ("ffg1156-1", 1, "LVCMOS25", Series7),
"xc7k480t": ("ffg1156-1", 1, "LVCMOS25", Series7),
"xc7k70t": ("fbg484-1", 2, "LVCMOS25", Series7),
"xc7v2000t": ("fhg1761-1", 1, "LVCMOS18", Series7),
"xc7v585t": ("ffg1157-1", 1, "LVCMOS18", Series7),
"xc7vh580t": ("flg1155-1", 1, "LVCMOS18", Series7),
"xc7vh870t": ("flg1932-1", 1, "LVCMOS18", Series7),
"xc7vx1140t": ("flg1926-1", 1, "LVCMOS18", Series7),
"xc7vx330t": ("ffg1157-1", 1, "LVCMOS18", Series7),
"xc7vx415t": ("ffg1157-1", 1, "LVCMOS18", Series7),
"xc7vx485t": ("ffg1157-1", 1, "LVCMOS18", Series7),
"xc7vx550t": ("ffg1158-1", 1, "LVCMOS18", Series7),
"xc7vx690t": ("ffg1157-1", 1, "LVCMOS18", Series7),
"xc7vx980t": ("ffg1926-1", 1, "LVCMOS18", Series7),
}
def __init__(self, device, pins, std, toolchain="ise"):
cs_n, clk, mosi, miso = pins[:4]
io = ["spiflash", 0,
Subsignal("cs_n", Pins(cs_n)),
Subsignal("mosi", Pins(mosi)),
Subsignal("miso", Pins(miso), Misc("PULLUP")),
IOStandard(std),
]
if clk:
io.append(Subsignal("clk", Pins(clk)))
for i, p in enumerate(pins[4:]):
io.append(Subsignal("pullup{}".format(i), Pins(p), Misc("PULLUP")))
xilinx.XilinxPlatform.__init__(self, device, [io], toolchain=toolchain)
@classmethod
def make(cls, device, errors=False):
pkg, id, std, Top = cls.pinouts[device]
pins = cls.packages[(pkg, id)]
platform = cls("{}-{}".format(device, pkg), pins, std, Top.toolchain)
top = Top(platform)
name = "bscan_spi_{}".format(device)
dir = "build_{}".format(device)
try:
platform.build(top, build_name=name, build_dir=dir)
except Exception as e:
print(("ERROR: xilinx_bscan_spi build failed "
"for {}: {}").format(device, e))
if errors:
raise
if __name__ == "__main__":
import argparse
import multiprocessing
p = argparse.ArgumentParser(description="build bscan_spi bitstreams "
"for openocd jtagspi flash driver")
p.add_argument("device", nargs="*",
default=sorted(list(XilinxBscanSpi.pinouts)),
help="build for these devices (default: %(default)s)")
p.add_argument("-p", "--parallel", default=1, type=int,
help="number of parallel builds (default: %(default)s)")
args = p.parse_args()
pool = multiprocessing.Pool(args.parallel)
pool.map(XilinxBscanSpi.make, args.device, chunksize=1)