litex/targets/kc705.py

104 lines
3.0 KiB
Python
Raw Normal View History

2014-08-03 03:48:30 -04:00
from migen.fhdl.std import *
from migen.genlib.resetsync import AsyncResetSynchronizer
2014-08-03 03:48:30 -04:00
2014-08-22 05:13:10 -04:00
from misoclib import lasmicon, spiflash
2014-08-08 09:58:41 -04:00
from misoclib.sdramphy import k7ddrphy
2014-08-22 05:13:10 -04:00
from misoclib.gensoc import SDRAMSoC
2014-08-03 03:48:30 -04:00
2014-08-03 09:42:39 -04:00
class _CRG(Module):
def __init__(self, platform):
self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
self.clock_domains.cd_clk200 = ClockDomain()
2014-08-03 09:42:39 -04:00
clk200 = platform.request("clk200")
clk200_se = Signal()
self.specials += Instance("IBUFDS", i_I=clk200.p, i_IB=clk200.n, o_O=clk200_se)
pll_locked = Signal()
pll_fb = Signal()
pll_sys = Signal()
pll_sys4x = Signal()
pll_clk200 = Signal()
self.specials += [
Instance("PLLE2_BASE",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
2014-08-03 09:42:39 -04:00
# VCO @ 1GHz
p_REF_JITTER1=0.01, p_CLKIN1_PERIOD=5.0,
p_CLKFBOUT_MULT=5, p_DIVCLK_DIVIDE=1,
i_CLKIN1=clk200_se, i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb,
2014-08-03 09:42:39 -04:00
# 125MHz
p_CLKOUT0_DIVIDE=8, p_CLKOUT0_PHASE=0.0, o_CLKOUT0=pll_sys,
2014-08-03 09:42:39 -04:00
# 500MHz
p_CLKOUT1_DIVIDE=2, p_CLKOUT1_PHASE=0.0, o_CLKOUT1=pll_sys4x,
2014-08-03 09:42:39 -04:00
# 200MHz
p_CLKOUT2_DIVIDE=5, p_CLKOUT2_PHASE=0.0, o_CLKOUT2=pll_clk200,
2014-08-03 09:42:39 -04:00
p_CLKOUT3_DIVIDE=2, p_CLKOUT3_PHASE=0.0, #o_CLKOUT3=,
2014-08-03 09:42:39 -04:00
p_CLKOUT4_DIVIDE=4, p_CLKOUT4_PHASE=0.0, #o_CLKOUT4=
),
Instance("BUFG", i_I=pll_sys, o_O=self.cd_sys.clk),
Instance("BUFG", i_I=pll_sys4x, o_O=self.cd_sys4x.clk),
Instance("BUFG", i_I=pll_clk200, o_O=self.cd_clk200.clk),
AsyncResetSynchronizer(self.cd_sys, ~pll_locked),
AsyncResetSynchronizer(self.cd_clk200, ~pll_locked),
]
reset_counter = Signal(4, reset=15)
ic_reset = Signal(reset=1)
self.sync.clk200 += \
If(reset_counter != 0,
reset_counter.eq(reset_counter - 1)
).Else(
ic_reset.eq(0)
)
self.specials += Instance("IDELAYCTRL", i_REFCLK=ClockSignal("clk200"), i_RST=ic_reset)
2014-08-03 09:42:39 -04:00
2014-08-22 05:13:10 -04:00
class BaseSoC(SDRAMSoC):
2014-08-03 03:48:30 -04:00
default_platform = "kc705"
def __init__(self, platform, **kwargs):
2014-08-08 09:58:41 -04:00
SDRAMSoC.__init__(self, platform,
2014-08-22 05:13:10 -04:00
clk_freq=125*1000000, cpu_reset_address=0xaf0000,
2014-08-03 03:48:30 -04:00
**kwargs)
2014-08-22 05:13:10 -04:00
self.submodules.crg = _CRG(platform)
2014-08-03 03:48:30 -04:00
2014-08-08 09:58:41 -04:00
sdram_geom = lasmicon.GeomSettings(
bank_a=3,
row_a=16,
col_a=10
)
sdram_timing = lasmicon.TimingSettings(
tRP=self.ns(15),
tRCD=self.ns(15),
tWR=self.ns(15),
tWTR=2,
tREFI=self.ns(7800, False),
tRFC=self.ns(70),
req_queue_size=8,
read_time=32,
write_time=16
)
self.submodules.ddrphy = k7ddrphy.K7DDRPHY(platform.request("ddram"), memtype="DDR3")
self.register_sdram_phy(self.ddrphy.dfi, self.ddrphy.phy_settings, sdram_geom, sdram_timing)
2014-08-03 03:48:30 -04:00
2014-08-22 05:13:10 -04:00
# BIOS is in SPI flash
spiflash_pads = platform.request("spiflash")
spiflash_pads.clk = Signal()
self.specials += Instance("STARTUPE2",
i_CLK=0, i_GSR=0, i_GTS=0, i_KEYCLEARB=0, i_PACK=0,
i_USRCCLKO=spiflash_pads.clk, i_USRCCLKTS=0, i_USRDONEO=1, i_USRDONETS=1)
self.submodules.spiflash = spiflash.SpiFlash(spiflash_pads,
cmd=0xfffefeff, cmd_width=32, addr_width=24, dummy=11, div=2)
self.flash_boot_address = 0xb00000
self.register_rom(self.spiflash.bus)
2014-08-03 03:48:30 -04:00
default_subtarget = BaseSoC