litex/targets/kc705.py

133 lines
4.9 KiB
Python

from migen.fhdl.std import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from misoclib.mem.sdram.module import MT8JTF12864
from misoclib.mem.sdram.phy import k7ddrphy
from misoclib.mem.sdram.core.lasmicon import LASMIconSettings
from misoclib.mem.flash import spiflash
from misoclib.soc import mem_decoder
from misoclib.soc.sdram import SDRAMSoC
from misoclib.com.liteethmini.phy import LiteEthPHY
from misoclib.com.liteethmini.mac import LiteEthMAC
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()
clk200 = platform.request("clk200")
clk200_se = Signal()
self.specials += Instance("IBUFDS", i_I=clk200.p, i_IB=clk200.n, o_O=clk200_se)
rst = platform.request("cpu_reset")
pll_locked = Signal()
pll_fb = Signal()
self.pll_sys = Signal()
pll_sys4x = Signal()
pll_clk200 = Signal()
self.specials += [
Instance("PLLE2_BASE",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
# 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,
# 125MHz
p_CLKOUT0_DIVIDE=8, p_CLKOUT0_PHASE=0.0, o_CLKOUT0=self.pll_sys,
# 500MHz
p_CLKOUT1_DIVIDE=2, p_CLKOUT1_PHASE=0.0, o_CLKOUT1=pll_sys4x,
# 200MHz
p_CLKOUT2_DIVIDE=5, p_CLKOUT2_PHASE=0.0, o_CLKOUT2=pll_clk200,
p_CLKOUT3_DIVIDE=2, p_CLKOUT3_PHASE=0.0, #o_CLKOUT3=,
p_CLKOUT4_DIVIDE=4, p_CLKOUT4_PHASE=0.0, #o_CLKOUT4=
),
Instance("BUFG", i_I=self.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 | rst),
AsyncResetSynchronizer(self.cd_clk200, ~pll_locked | rst),
]
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)
class BaseSoC(SDRAMSoC):
default_platform = "kc705"
csr_map = {
"spiflash": 16,
"ddrphy": 17,
}
csr_map.update(SDRAMSoC.csr_map)
def __init__(self, platform, sdram_controller_settings=LASMIconSettings(), **kwargs):
SDRAMSoC.__init__(self, platform,
clk_freq=125*1000000, cpu_reset_address=0xaf0000,
sdram_controller_settings=sdram_controller_settings,
**kwargs)
self.submodules.crg = _CRG(platform)
if not self.integrated_main_ram_size:
self.submodules.ddrphy = k7ddrphy.K7DDRPHY(platform.request("ddram"),
MT8JTF12864(self.clk_freq))
self.register_sdram_phy(self.ddrphy)
if not self.integrated_rom_size:
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, dummy=11, div=2)
self.add_constant("SPIFLASH_PAGE_SIZE", 256)
self.add_constant("SPIFLASH_SECTOR_SIZE", 0x10000)
self.flash_boot_address = 0xb00000
self.register_rom(self.spiflash.bus)
class MiniSoC(BaseSoC):
csr_map = {
"ethphy": 18,
"ethmac": 19,
}
csr_map.update(BaseSoC.csr_map)
interrupt_map = {
"ethmac": 2,
}
interrupt_map.update(BaseSoC.interrupt_map)
mem_map = {
"ethmac": 0x30000000, # (shadow @0xb0000000)
}
mem_map.update(BaseSoC.mem_map)
def __init__(self, platform, **kwargs):
BaseSoC.__init__(self, platform, **kwargs)
self.submodules.ethphy = LiteEthPHY(platform.request("eth_clocks"), platform.request("eth"), clk_freq=self.clk_freq)
self.submodules.ethmac = LiteEthMAC(phy=self.ethphy, dw=32, interface="wishbone")
self.add_wb_slave(mem_decoder(self.mem_map["ethmac"]), self.ethmac.bus)
self.add_memory_region("ethmac", self.mem_map["ethmac"] | self.shadow_base, 0x2000)
default_subtarget = BaseSoC