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kc705: fix DRTIO targets

This commit is contained in:
Sebastien Bourdeauducq 2021-08-06 15:36:10 +08:00
parent 5111132ef0
commit 242dfae38e

View File

@ -82,16 +82,75 @@ class _RTIOCRG(Module, AutoCSR):
]
# The default user SMA voltage on KC705 is 2.5V, and the Migen platform
class _RTIOClockMultiplier(Module, AutoCSR):
def __init__(self, rtio_clk_freq):
self.pll_reset = CSRStorage(reset=1)
self.pll_locked = CSRStatus()
self.clock_domains.cd_rtiox4 = ClockDomain(reset_less=True)
# See "Global Clock Network Deskew Using Two BUFGs" in ug472.
clkfbout = Signal()
clkfbin = Signal()
rtiox4_clk = Signal()
pll_locked = Signal()
self.specials += [
Instance("MMCME2_BASE",
p_CLKIN1_PERIOD=1e9/rtio_clk_freq,
i_CLKIN1=ClockSignal("rtio"),
i_RST=self.pll_reset.storage,
o_LOCKED=pll_locked,
p_CLKFBOUT_MULT_F=8.0, p_DIVCLK_DIVIDE=1,
o_CLKFBOUT=clkfbout, i_CLKFBIN=clkfbin,
p_CLKOUT0_DIVIDE_F=2.0, o_CLKOUT0=rtiox4_clk,
),
Instance("BUFG", i_I=clkfbout, o_O=clkfbin),
Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),
MultiReg(pll_locked, self.pll_locked.status)
]
def fix_serdes_timing_path(platform):
# ignore timing of path from OSERDESE2 through the pad to ISERDESE2
platform.add_platform_command(
"set_false_path -quiet "
"-through [get_pins -filter {{REF_PIN_NAME == OQ || REF_PIN_NAME == TQ}} "
"-of [get_cells -filter {{REF_NAME == OSERDESE2}}]] "
"-to [get_pins -filter {{REF_PIN_NAME == D}} "
"-of [get_cells -filter {{REF_NAME == ISERDESE2}}]]"
)
# The default voltage for these signals on KC705 is 2.5V, and the Migen platform
# follows this default. But since the SMAs are on the same bank as the DDS,
# which is set to 3.3V by reprogramming the KC705 power ICs, we need to
# redefine them here.
_sma33_io = [
_reprogrammed3v3_io = [
("user_sma_gpio_p_33", 0, Pins("Y23"), IOStandard("LVCMOS33")),
("user_sma_gpio_n_33", 0, Pins("Y24"), IOStandard("LVCMOS33")),
("si5324_33", 0,
Subsignal("rst_n", Pins("AE20"), IOStandard("LVCMOS33")),
Subsignal("int", Pins("AG24"), IOStandard("LVCMOS33"))
),
("sfp_tx_disable_n_33", 0, Pins("Y20"), IOStandard("LVCMOS33")),
# HACK: this should be LVDS, but TMDS is the only supported differential
# output standard at 3.3V. KC705 hardware design issue?
("si5324_clkin_33", 0,
Subsignal("p", Pins("W27"), IOStandard("TMDS_33")),
Subsignal("n", Pins("W28"), IOStandard("TMDS_33"))
),
("sdcard_spi_33", 0,
Subsignal("miso", Pins("AC20"), Misc("PULLUP=TRUE")),
Subsignal("clk", Pins("AB23")),
Subsignal("mosi", Pins("AB22")),
Subsignal("cs_n", Pins("AC21")),
IOStandard("LVCMOS33")
)
]
_ams101_dac = [
("ams101_dac", 0,
Subsignal("ldac", Pins("XADC:GPIO0")),
@ -102,17 +161,6 @@ _ams101_dac = [
)
]
_sdcard_spi_33 = [
("sdcard_spi_33", 0,
Subsignal("miso", Pins("AC20"), Misc("PULLUP=TRUE")),
Subsignal("clk", Pins("AB23")),
Subsignal("mosi", Pins("AB22")),
Subsignal("cs_n", Pins("AC21")),
IOStandard("LVCMOS33")
)
]
class _StandaloneBase(MiniSoC, AMPSoC):
mem_map = {
"cri_con": 0x10000000,
@ -150,9 +198,8 @@ class _StandaloneBase(MiniSoC, AMPSoC):
self.platform.request("user_led", 1)))
self.csr_devices.append("leds")
self.platform.add_extension(_sma33_io)
self.platform.add_extension(_reprogrammed3v3_io)
self.platform.add_extension(_ams101_dac)
self.platform.add_extension(_sdcard_spi_33)
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
@ -220,11 +267,10 @@ class _MasterBase(MiniSoC, AMPSoC):
self.platform.toolchain.bitgen_opt += " -g compress"
platform = self.platform
platform.add_extension(_sma33_io)
platform.add_extension(_reprogrammed3v3_io)
platform.add_extension(_ams101_dac)
platform.add_extension(_sdcard_spi_33)
self.comb += platform.request("sfp_tx_disable_n").eq(1)
self.comb += platform.request("sfp_tx_disable_n_33").eq(1)
tx_pads = [
platform.request("sfp_tx"), platform.request("user_sma_mgt_tx")
]
@ -277,7 +323,7 @@ class _MasterBase(MiniSoC, AMPSoC):
self.add_memory_group("drtioaux_mem", drtioaux_memory_group)
self.config["RTIO_FREQUENCY"] = str(self.drtio_transceiver.rtio_clk_freq/1e6)
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324_33").rst_n)
self.csr_devices.append("si5324_rst_n")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
@ -307,6 +353,10 @@ class _MasterBase(MiniSoC, AMPSoC):
platform.add_false_path_constraints(
self.crg.cd_sys.clk, gtx0.txoutclk, gtx.rxoutclk)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.drtio_transceiver.rtio_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(platform)
def add_rtio(self, rtio_channels):
self.submodules.rtio_moninj = rtio.MonInj(rtio_channels)
self.csr_devices.append("rtio_moninj")
@ -351,11 +401,10 @@ class _SatelliteBase(BaseSoC):
self.platform.toolchain.bitgen_opt += " -g compress"
platform = self.platform
platform.add_extension(_sma33_io)
platform.add_extension(_reprogrammed3v3_io)
platform.add_extension(_ams101_dac)
platform.add_extension(_sdcard_spi_33)
self.comb += platform.request("sfp_tx_disable_n").eq(1)
self.comb += platform.request("sfp_tx_disable_n_33").eq(1)
tx_pads = [
platform.request("sfp_tx"), platform.request("user_sma_mgt_tx")
]
@ -422,14 +471,14 @@ class _SatelliteBase(BaseSoC):
self.config["RTIO_FREQUENCY"] = str(self.drtio_transceiver.rtio_clk_freq/1e6)
# Si5324 Phaser
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
si5324_clkin=platform.request("si5324_clkin_33"),
rx_synchronizer=self.rx_synchronizer,
ultrascale=False,
rtio_clk_freq=self.drtio_transceiver.rtio_clk_freq)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324_33").rst_n)
self.csr_devices.append("si5324_rst_n")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
@ -458,6 +507,10 @@ class _SatelliteBase(BaseSoC):
platform.add_false_path_constraints(
self.crg.cd_sys.clk, gtx.rxoutclk)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.drtio_transceiver.rtio_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(platform)
def add_rtio(self, rtio_channels):
self.submodules.rtio_moninj = rtio.MonInj(rtio_channels)
self.csr_devices.append("rtio_moninj")