litex/misoc/targets/papilio_pro.py

109 lines
4.7 KiB
Python
Executable File

#!/usr/bin/env python3
import argparse
from fractions import Fraction
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from migen.build.platforms import papilio_pro
from misoc.cores.sdram_settings import MT48LC4M16
from misoc.cores.sdram_phy import GENSDRPHY
from misoc.cores import spi_flash
from misoc.integration.soc_sdram import *
from misoc.integration.builder import *
class _CRG(Module):
def __init__(self, platform, clk_freq):
self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys_ps = ClockDomain()
f0 = 32*1000000
clk32 = platform.request("clk32")
clk32a = Signal()
self.specials += Instance("IBUFG", i_I=clk32, o_O=clk32a)
clk32b = Signal()
self.specials += Instance("BUFIO2", p_DIVIDE=1,
p_DIVIDE_BYPASS="TRUE", p_I_INVERT="FALSE",
i_I=clk32a, o_DIVCLK=clk32b)
f = Fraction(int(clk_freq), int(f0))
n, m, p = f.denominator, f.numerator, 8
assert f0/n*m == clk_freq
pll_lckd = Signal()
pll_fb = Signal()
pll = Signal(6)
self.specials.pll = Instance("PLL_ADV", p_SIM_DEVICE="SPARTAN6",
p_BANDWIDTH="OPTIMIZED", p_COMPENSATION="INTERNAL",
p_REF_JITTER=.01, p_CLK_FEEDBACK="CLKFBOUT",
i_DADDR=0, i_DCLK=0, i_DEN=0, i_DI=0, i_DWE=0, i_RST=0, i_REL=0,
p_DIVCLK_DIVIDE=1, p_CLKFBOUT_MULT=m*p//n, p_CLKFBOUT_PHASE=0.,
i_CLKIN1=clk32b, i_CLKIN2=0, i_CLKINSEL=1,
p_CLKIN1_PERIOD=1000000000/f0, p_CLKIN2_PERIOD=0.,
i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb, o_LOCKED=pll_lckd,
o_CLKOUT0=pll[0], p_CLKOUT0_DUTY_CYCLE=.5,
o_CLKOUT1=pll[1], p_CLKOUT1_DUTY_CYCLE=.5,
o_CLKOUT2=pll[2], p_CLKOUT2_DUTY_CYCLE=.5,
o_CLKOUT3=pll[3], p_CLKOUT3_DUTY_CYCLE=.5,
o_CLKOUT4=pll[4], p_CLKOUT4_DUTY_CYCLE=.5,
o_CLKOUT5=pll[5], p_CLKOUT5_DUTY_CYCLE=.5,
p_CLKOUT0_PHASE=0., p_CLKOUT0_DIVIDE=p//1,
p_CLKOUT1_PHASE=0., p_CLKOUT1_DIVIDE=p//1,
p_CLKOUT2_PHASE=0., p_CLKOUT2_DIVIDE=p//1,
p_CLKOUT3_PHASE=0., p_CLKOUT3_DIVIDE=p//1,
p_CLKOUT4_PHASE=0., p_CLKOUT4_DIVIDE=p//1, # sys
p_CLKOUT5_PHASE=270., p_CLKOUT5_DIVIDE=p//1, # sys_ps
)
self.specials += Instance("BUFG", i_I=pll[4], o_O=self.cd_sys.clk)
self.specials += Instance("BUFG", i_I=pll[5], o_O=self.cd_sys_ps.clk)
self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll_lckd)
self.specials += Instance("ODDR2", p_DDR_ALIGNMENT="NONE",
p_INIT=0, p_SRTYPE="SYNC",
i_D0=0, i_D1=1, i_S=0, i_R=0, i_CE=1,
i_C0=self.cd_sys.clk, i_C1=~self.cd_sys.clk,
o_Q=platform.request("sdram_clock"))
class BaseSoC(SoCSDRAM):
csr_map = {
"spiflash": 16,
}
csr_map.update(SoCSDRAM.csr_map)
def __init__(self, **kwargs):
platform = papilio_pro.Platform()
clk_freq = 80*1000000
SoCSDRAM.__init__(self, platform, clk_freq,
cpu_reset_address=0x60000,
**kwargs)
self.submodules.crg = _CRG(platform, clk_freq)
if not self.integrated_main_ram_size:
self.submodules.sdrphy = GENSDRPHY(platform.request("sdram"))
sdram_module = MT48LC4M16(clk_freq)
self.register_sdram(self.sdrphy, "minicon",
sdram_module.geom_settings, sdram_module.timing_settings)
if not self.integrated_rom_size:
self.submodules.spiflash = spi_flash.SpiFlash(platform.request("spiflash2x"),
dummy=4, div=6)
self.flash_boot_address = 0x70000
self.register_rom(self.spiflash.bus)
def main():
parser = argparse.ArgumentParser(description="MiSoC port to the Papilio Pro")
builder_args(parser)
soc_sdram_args(parser)
args = parser.parse_args()
soc = BaseSoC(**soc_sdram_argdict(args))
builder = Builder(soc, **builder_argdict(args))
builder.build()
if __name__ == "__main__":
main()