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added rtioclockmultiplier where applicable

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(nist variants don't compile for other reasons now)
This commit is contained in:
mwojcik 2021-09-07 15:22:01 +02:00
parent 1bddad6ff2
commit 9c14694fc4
2 changed files with 93 additions and 8 deletions
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36
src/gateware/kasli_soc.py
View File

@ -76,6 +76,36 @@ class RTIOCRG(Module, AutoCSR):
]
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)
]
eem_iostandard_dict = {
0: "LVDS_25",
1: "LVDS_25",
@ -338,11 +368,11 @@ class GenericSatellite(SoCCore):
platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
self.crg = self.ps7 # HACK for eem_7series to find the clock
# todo: replace rtio_crg with rtioclockmultiplier
self.submodules.rtio_crg = _RTIOClockMultiplier(rtio_clk_freq)
self.csr_devices.append("rtio_crg")
# put range(1) to make it work while axi doesn't support anything but P2P
data_pads = [platform.request("sfp", i) for i in range(4)]
data_pads = [platform.request("sfp", i) for i in range(1)]
self.submodules.drtio_transceiver = gtx_7series.GTX(
clock_pads=platform.request("clk125_gtp"), # referred to as clk gtp in schematics, but for gtx?

63
src/gateware/zc706.py
View File

@ -69,6 +69,49 @@ class RTIOCRG(Module, AutoCSR):
MultiReg(pll_locked, self.pll_locked.status)
]
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}}]]"
)
class ZC706(SoCCore):
def __init__(self, acpki=False):
self.acpki = acpki
@ -148,7 +191,7 @@ class _MasterBase(SoCCore):
platform.add_platform_command("create_clock -name clk_fpga_0 -period 8 [get_pins \"PS7/FCLKCLK[0]\"]")
platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
sys_clk_freq = 125e6
self.sys_clk_freq = 125e6
platform = self.platform
@ -161,7 +204,7 @@ class _MasterBase(SoCCore):
self.submodules.drtio_transceiver = gtx_7series.GTX(
clock_pads=platform.request("si5324_clkout"),
pads=data_pads,
sys_clk_freq=sys_clk_freq)
sys_clk_freq=self.sys_clk_freq)
self.csr_devices.append("drtio_transceiver")
self.submodules.rtio_tsc = rtio.TSC("async", glbl_fine_ts_width=3)
@ -247,7 +290,7 @@ class _SatelliteBase(SoCCore):
platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
# init end
sys_clk_freq = 125e6
self.sys_clk_freq = 125e6
platform = self.platform
# SFP
@ -263,7 +306,7 @@ class _SatelliteBase(SoCCore):
self.submodules.drtio_transceiver = gtx_7series.GTX(
clock_pads=platform.request("si5324_clkout"),
pads=data_pads,
sys_clk_freq=sys_clk_freq)
sys_clk_freq=self.sys_clk_freq)
self.csr_devices.append("drtio_transceiver")
drtioaux_csr_group = []
@ -505,11 +548,17 @@ class NIST_CLOCK(ZC706, _NIST_CLOCK_RTIO):
class NIST_CLOCK_Master(_MasterBase, _NIST_CLOCK_RTIO):
def __init__(self, acpki):
_MasterBase.__init__(self, acpki)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.sys_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(self.platform)
_NIST_CLOCK_RTIO.__init__(self)
class NIST_CLOCK_Satellite(_SatelliteBase, _NIST_CLOCK_RTIO):
def __init__(self, acpki):
_SatelliteBase.__init__(self, acpki)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.sys_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(self.platform)
_NIST_CLOCK_RTIO.__init__(self)
class NIST_QC2(ZC706, _NIST_QC2_RTIO):
@ -520,11 +569,17 @@ class NIST_QC2(ZC706, _NIST_QC2_RTIO):
class NIST_QC2_Master(_MasterBase, _NIST_QC2_RTIO):
def __init__(self, acpki):
_MasterBase.__init__(self, acpki)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.sys_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(self.platform)
_NIST_QC2_RTIO.__init__(self)
class NIST_QC2_Satellite(_SatelliteBase, _NIST_QC2_RTIO):
def __init__(self, acpki):
_SatelliteBase.__init__(self, acpki)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.sys_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(self.platform)
_NIST_QC2_RTIO.__init__(self)