183 lines
7.1 KiB
Python
183 lines
7.1 KiB
Python
import os
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from fractions import Fraction
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from math import ceil
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from migen.fhdl.std import *
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from mibuild.generic_platform import ConstraintError
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from misoclib.mem.sdram.module import MT46V32M16
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from misoclib.mem.sdram.phy import s6ddrphy
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from misoclib.mem.sdram.core.lasmicon import LASMIconSettings
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from misoclib.mem.flash import norflash16
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from misoclib.video import framebuffer
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from misoclib.soc import mem_decoder
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from misoclib.soc.sdram import SDRAMSoC
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from misoclib.com import gpio
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from misoclib.com.liteeth.phy import LiteEthPHY
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from misoclib.com.liteeth.core.mac import LiteEthMAC
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class _MXCRG(Module):
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def __init__(self, pads, outfreq1x):
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self.clock_domains.cd_sys = ClockDomain()
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self.clock_domains.cd_sdram_half = ClockDomain()
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self.clock_domains.cd_sdram_full_wr = ClockDomain()
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self.clock_domains.cd_sdram_full_rd = ClockDomain()
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self.clock_domains.cd_base50 = ClockDomain(reset_less=True)
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self.clk4x_wr_strb = Signal()
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self.clk4x_rd_strb = Signal()
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###
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infreq = 50*1000000
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ratio = Fraction(outfreq1x)/Fraction(infreq)
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in_period = float(Fraction(1000000000)/Fraction(infreq))
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self.specials += Instance("mxcrg",
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Instance.Parameter("in_period", in_period),
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Instance.Parameter("f_mult", ratio.numerator),
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Instance.Parameter("f_div", ratio.denominator),
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Instance.Input("clk50_pad", pads.clk50),
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Instance.Input("trigger_reset", pads.trigger_reset),
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Instance.Output("sys_clk", self.cd_sys.clk),
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Instance.Output("sys_rst", self.cd_sys.rst),
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Instance.Output("clk2x_270", self.cd_sdram_half.clk),
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Instance.Output("clk4x_wr", self.cd_sdram_full_wr.clk),
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Instance.Output("clk4x_rd", self.cd_sdram_full_rd.clk),
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Instance.Output("base50_clk", self.cd_base50.clk),
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Instance.Output("clk4x_wr_strb", self.clk4x_wr_strb),
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Instance.Output("clk4x_rd_strb", self.clk4x_rd_strb),
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Instance.Output("norflash_rst_n", pads.norflash_rst_n),
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Instance.Output("ddr_clk_pad_p", pads.ddr_clk_p),
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Instance.Output("ddr_clk_pad_n", pads.ddr_clk_n))
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class _MXClockPads:
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def __init__(self, platform):
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self.clk50 = platform.request("clk50")
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self.trigger_reset = 0
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try:
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self.trigger_reset = platform.request("user_btn", 1)
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except ConstraintError:
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pass
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self.norflash_rst_n = platform.request("norflash_rst_n")
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ddram_clock = platform.request("ddram_clock")
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self.ddr_clk_p = ddram_clock.p
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self.ddr_clk_n = ddram_clock.n
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class BaseSoC(SDRAMSoC):
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default_platform = "mixxeo" # also supports m1
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def __init__(self, platform, sdram_controller_settings=LASMIconSettings(), **kwargs):
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SDRAMSoC.__init__(self, platform,
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clk_freq=(83 + Fraction(1, 3))*1000000,
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cpu_reset_address=0x00180000,
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sdram_controller_settings=sdram_controller_settings,
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**kwargs)
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self.submodules.crg = _MXCRG(_MXClockPads(platform), self.clk_freq)
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if not self.integrated_main_ram_size:
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self.submodules.ddrphy = s6ddrphy.S6HalfRateDDRPHY(platform.request("ddram"),
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MT46V32M16(self.clk_freq),
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rd_bitslip=0,
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wr_bitslip=3,
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dqs_ddr_alignment="C1")
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self.register_sdram_phy(self.ddrphy)
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self.comb += [
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self.ddrphy.clk4x_wr_strb.eq(self.crg.clk4x_wr_strb),
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self.ddrphy.clk4x_rd_strb.eq(self.crg.clk4x_rd_strb)
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]
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if not self.integrated_rom_size:
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clk_period_ns = 1000000000/self.clk_freq
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self.submodules.norflash = norflash16.NorFlash16(platform.request("norflash"),
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ceil(110/clk_period_ns), ceil(50/clk_period_ns))
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self.flash_boot_address = 0x001a0000
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self.register_rom(self.norflash.bus)
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platform.add_platform_command("""
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INST "mxcrg/wr_bufpll" LOC = "BUFPLL_X0Y2";
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INST "mxcrg/rd_bufpll" LOC = "BUFPLL_X0Y3";
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""")
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platform.add_source(os.path.join("misoclib", "mxcrg.v"))
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class MiniSoC(BaseSoC):
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csr_map = {
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"ethphy": 16,
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"ethmac": 17,
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}
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csr_map.update(BaseSoC.csr_map)
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interrupt_map = {
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"ethmac": 2,
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}
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interrupt_map.update(BaseSoC.interrupt_map)
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mem_map = {
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"ethmac": 0x30000000, # (shadow @0xb0000000)
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}
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mem_map.update(BaseSoC.mem_map)
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def __init__(self, platform, **kwargs):
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BaseSoC.__init__(self, platform, **kwargs)
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if platform.name == "mixxeo":
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self.submodules.leds = gpio.GPIOOut(platform.request("user_led"))
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if platform.name == "m1":
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self.submodules.buttons = gpio.GPIOIn(Cat(platform.request("user_btn", 0),
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platform.request("user_btn", 2)))
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self.submodules.leds = gpio.GPIOOut(Cat(platform.request("user_led", i) for i in range(2)))
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self.submodules.ethphy = LiteEthPHY(platform.request("eth_clocks"),
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platform.request("eth"))
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self.submodules.ethmac = LiteEthMAC(phy=self.ethphy, dw=32, interface="wishbone")
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self.add_wb_slave(mem_decoder(self.mem_map["ethmac"]), self.ethmac.bus)
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self.add_memory_region("ethmac", self.mem_map["ethmac"] | self.shadow_base, 0x2000)
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def get_vga_dvi(platform):
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try:
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pads_vga = platform.request("vga_out")
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except ConstraintError:
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pads_vga = None
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try:
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pads_dvi = platform.request("dvi_out")
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except ConstraintError:
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pads_dvi = None
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else:
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platform.add_platform_command("""
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PIN "dviout_pix_bufg.O" CLOCK_DEDICATED_ROUTE = FALSE;
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""")
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return pads_vga, pads_dvi
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def add_vga_tig(platform, fb):
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platform.add_platform_command("""
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NET "{vga_clk}" TNM_NET = "GRPvga_clk";
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NET "sys_clk" TNM_NET = "GRPsys_clk";
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TIMESPEC "TSise_sucks1" = FROM "GRPvga_clk" TO "GRPsys_clk" TIG;
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TIMESPEC "TSise_sucks2" = FROM "GRPsys_clk" TO "GRPvga_clk" TIG;
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""", vga_clk=fb.driver.clocking.cd_pix.clk)
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class FramebufferSoC(MiniSoC):
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csr_map = {
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"fb": 18,
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}
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csr_map.update(MiniSoC.csr_map)
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def __init__(self, platform, **kwargs):
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MiniSoC.__init__(self, platform, **kwargs)
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pads_vga, pads_dvi = get_vga_dvi(platform)
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self.submodules.fb = framebuffer.Framebuffer(pads_vga, pads_dvi,
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self.sdram.crossbar.get_master())
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add_vga_tig(platform, self.fb)
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default_subtarget = FramebufferSoC
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