litex-boards/litex_boards/platforms/antmicro_datacenter_ddr4_te...

152 lines
6.1 KiB
Python

#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Antmicro <www.antmicro.com>
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.xilinx import XilinxPlatform
from litex.build.openocd import OpenOCD
# IOs ----------------------------------------------------------------------------------------------
_io = [
("clk100", 0, Pins("C12"), IOStandard("LVCMOS33")),
("user_led", 0, Pins("D21"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("B20"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("B21"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("C22"), IOStandard("LVCMOS33")),
("user_led", 4, Pins("E22"), IOStandard("LVCMOS33")),
("user_btn", 0, Pins("C21"), IOStandard("LVCMOS33")),
("user_btn", 1, Pins("A20"), IOStandard("LVCMOS33")),
("user_btn", 2, Pins("E21"), IOStandard("LVCMOS33")),
("user_btn", 3, Pins("D23"), IOStandard("LVCMOS33")),
("serial", 0,
Subsignal("tx", Pins("E26")),
Subsignal("rx", Pins("F25")),
IOStandard("LVCMOS33")
),
("serial", 1,
Subsignal("tx", Pins("D26")),
Subsignal("rx", Pins("E25")),
IOStandard("LVCMOS33")
),
# DDR4
("ddr4", 0,
Subsignal("a", Pins(
"AF10 AC11 AD11 AD10 AC9 AD9 AB9 AF7 AE8",
"AE7 Y12 AC7 AB7 AD13"),
IOStandard("SSTL12_DCI")),
Subsignal("ba", Pins("AB11 AB10"), IOStandard("SSTL12_DCI")),
Subsignal("bg", Pins("AA9 AF9"), IOStandard("SSTL12_DCI")),
Subsignal("ras_n", Pins("AA12"), IOStandard("SSTL12_DCI")), # A16
Subsignal("cas_n", Pins("AF13"), IOStandard("SSTL12_DCI")), # A15
Subsignal("we_n", Pins("AA13"), IOStandard("SSTL12_DCI")), # A14
Subsignal("cs_n", Pins("W13"), IOStandard("SSTL12_DCI")),
Subsignal("act_n", Pins("Y8"), IOStandard("SSTL12_DCI")),
Subsignal("alert_n", Pins("AE10"), IOStandard("SSTL12_DCI")),
Subsignal("par", Pins("AE13"), IOStandard("SSTL12_DCI")),
Subsignal("dm", Pins("AF3 AE5 AD6 AC6 AF2 AE3 AE6 AD5"),
IOStandard("SSTL12_DCI")),
Subsignal("dq", Pins(
"W11 Y11 V7 Y7 V11 V9 V8 W8",
"U2 V6 Y2 Y3 U5 U4 W3 Y1",
"AA2 AB2 AE1 AE2 V2 W1 AD1 AC2",
"W4 AA3 AD3 AC4 V3 V4 AB4 AC3",
"AC16 AC17 AB16 AA19 AB15 AD16 AC18 AC19",
"AF17 AE17 AF20 AD19 AE15 AE16 AF19 AD18",
"Y18 Y17 W14 V14 AA20 AA15 V18 W16",
"AA18 AB19 V16 W15 AB17 AA17 V19 V17"),
IOStandard("SSTL12_T_DCI")),
Subsignal("dqs_p", Pins(
"W10 B17 W6 D19 AB1 L19 AA5 J15",
"AD20 T24 AE18 P19 W18 R16 Y15 M25"),
IOStandard("DIFF_HSUL_12")),
Subsignal("dqs_n", Pins(
"W9 A17 W5 D20 AC1 L20 AB5 J16",
"AE20 T25 AF18 P20 W19 R17 Y16 L25"),
IOStandard("DIFF_HSUL_12")),
Subsignal("clk_p", Pins("AE12"), IOStandard("DIFF_SSTL12_DCI")),
Subsignal("clk_n", Pins("AF12"), IOStandard("DIFF_SSTL12_DCI")),
Subsignal("cke", Pins("AA8"), IOStandard("SSTL12_DCI")), # also AM15 for larger SODIMMs
Subsignal("odt", Pins("Y13"), IOStandard("SSTL12_DCI")), # also AM16 for larger SODIMMs
Subsignal("reset_n", Pins("AB6"), IOStandard("SSTL12")),
Misc("SLEW=FAST"),
),
# RGMII Ethernet
("eth_ref_clk", 0, Pins("AA23"), IOStandard("LVCMOS33")),
("eth_clocks", 0,
Subsignal("rx", Pins("Y23")),
Subsignal("tx", Pins("AA24")),
IOStandard("LVCMOS33")
),
("eth", 0,
Subsignal("rst_n", Pins("AA22")),
Subsignal("mdio", Pins("AB26")),
Subsignal("mdc", Pins("AA25")),
Subsignal("rx_ctl", Pins("Y25")),
Subsignal("rx_data", Pins("W26 W25 V26 U25")),
Subsignal("tx_ctl", Pins("U26")),
Subsignal("tx_data", Pins("W24 Y26 Y22 Y21")),
IOStandard("LVCMOS33")
),
# HyperRAM
("hyperram", 0,
Subsignal("clk_n", Pins("AE26")),
Subsignal("clk_p", Pins("AD26")),
Subsignal("rst_n", Pins("AC24")),
Subsignal("cs_n", Pins("AC26")),
Subsignal("dq", Pins("AE23 AD25 AF24 AE22 AF23 AF25 AE25 AD24")),
Subsignal("rwds", Pins("AD23")),
IOStandard("LVCMOS33")
),
# SD Card
("sdcard", 0,
Subsignal("data", Pins("E10 F8 C9 D9"), Misc("PULLUP True")),
Subsignal("cmd", Pins("D8"), Misc("PULLUP True")),
Subsignal("clk", Pins("D10")),
Subsignal("cd", Pins("F9")),
Misc("SLEW=FAST"),
IOStandard("LVCMOS33"),
),
# I2C
("i2c", 0,
Subsignal("scl", Pins("Y5")),
Subsignal("sda", Pins("Y6")),
IOStandard("SSTL12_T_DCI"),
),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(XilinxPlatform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self, device="xc7k160tffg676-1", toolchain="vivado"):
XilinxPlatform.__init__(self, device, _io, toolchain=toolchain)
self.toolchain.bitstream_commands = \
["set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]"]
self.toolchain.additional_commands = \
["write_cfgmem -force -format bin -interface spix4 -size 16 "
"-loadbit \"up 0x0 {build_name}.bit\" -file {build_name}.bin"]
self.add_platform_command("set_property INTERNAL_VREF 0.6 [get_iobanks 32]")
self.add_platform_command("set_property INTERNAL_VREF 0.6 [get_iobanks 33]")
self.add_platform_command("set_property INTERNAL_VREF 0.6 [get_iobanks 34]")
self.add_platform_command("set_property DCI_CASCADE {{32 34}} [get_iobanks 33]")
def create_programmer(self):
return OpenOCD("openocd_xc7_ft4232.cfg", "bscan_spi_xc7k100t.bit")
def do_finalize(self, fragment):
XilinxPlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)