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zynq_clocking: Add sys5x, 208MHz CLK & IDELAYCTRL 

- Port from artiq repo
- Generate sys5x for for EEM Serdes, 208MHz REF Clock for IDELAYCTRL
- Add IDELAYCTRL for IDEALYE2 in EEM Serdes
This commit is contained in:
linuswck 2023-10-05 11:28:45 +08:00
parent a28a819b18
commit 8fd1306145
1 changed files with 45 additions and 25 deletions
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70
src/gateware/zynq_clocking.py
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@ -69,6 +69,8 @@ class SYSCRG(Module, AutoCSR):
# assumes bootstrap clock is same freq as main and sys output # assumes bootstrap clock is same freq as main and sys output
self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
self.clock_domains.cd_sys5x = ClockDomain(reset_less=True)
self.clock_domains.cd_clk200 = ClockDomain()
self.current_clock = CSRStatus() self.current_clock = CSRStatus()
@ -78,11 +80,6 @@ class SYSCRG(Module, AutoCSR):
period = 1e9/freq period = 1e9/freq
pll_locked = Signal()
pll_sys = Signal()
pll_sys4x = Signal()
fb_clk = Signal()
self.submodules.clk_sw_fsm = ClockSwitchFSM() self.submodules.clk_sw_fsm = ClockSwitchFSM()
if clk_sw is None: if clk_sw is None:
@ -91,32 +88,55 @@ class SYSCRG(Module, AutoCSR):
else: else:
self.comb += self.clk_sw_fsm.i_clk_sw.eq(clk_sw) self.comb += self.clk_sw_fsm.i_clk_sw.eq(clk_sw)
mmcm_locked = Signal()
mmcm_sys = Signal()
mmcm_sys4x = Signal()
mmcm_sys5x = Signal()
mmcm_clk208 = Signal()
mmcm_fb_clk = Signal()
self.specials += [ self.specials += [
Instance("PLLE2_ADV", Instance("MMCME2_ADV",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked, p_STARTUP_WAIT="FALSE", o_LOCKED=mmcm_locked,
p_BANDWIDTH="HIGH", p_BANDWIDTH="HIGH",
p_REF_JITTER1=0.001, p_REF_JITTER1=0.001,
p_CLKIN1_PERIOD=period, i_CLKIN1=main_clk, p_CLKIN1_PERIOD=period, i_CLKIN1=main_clk,
p_CLKIN2_PERIOD=period, i_CLKIN2=bootstrap_clk, p_CLKIN2_PERIOD=period, i_CLKIN2=bootstrap_clk,
i_CLKINSEL=self.clk_sw_fsm.o_clk_sw, i_CLKINSEL=self.clk_sw_fsm.o_clk_sw,
# VCO @ 1.5GHz when using 125MHz input # VCO @ 1.25GHz
# 1.2GHz for 100MHz (zc706) p_CLKFBOUT_MULT_F=10, p_DIVCLK_DIVIDE=1,
p_CLKFBOUT_MULT=12, p_DIVCLK_DIVIDE=1, i_CLKFBIN=mmcm_fb_clk,
i_CLKFBIN=fb_clk, i_RST=self.clk_sw_fsm.o_reset,
i_RST=self.clk_sw_fsm.o_reset,
o_CLKFBOUT=fb_clk, o_CLKFBOUT=mmcm_fb_clk,
p_CLKOUT0_DIVIDE=3, p_CLKOUT0_PHASE=0.0, p_CLKOUT0_DIVIDE_F=2.5, p_CLKOUT0_PHASE=0.0, o_CLKOUT0=mmcm_sys4x,
o_CLKOUT0=pll_sys4x,
p_CLKOUT1_DIVIDE=12, p_CLKOUT1_PHASE=0.0, # 125MHz
o_CLKOUT1=pll_sys), p_CLKOUT1_DIVIDE=10, p_CLKOUT1_PHASE=0.0, o_CLKOUT1=mmcm_sys,
Instance("BUFG", i_I=pll_sys, o_O=self.cd_sys.clk),
Instance("BUFG", i_I=pll_sys4x, o_O=self.cd_sys4x.clk),
AsyncResetSynchronizer(self.cd_sys, ~pll_locked), # 625MHz
p_CLKOUT2_DIVIDE=2, p_CLKOUT2_PHASE=0.0, o_CLKOUT2=mmcm_sys5x,
# 208MHz
p_CLKOUT3_DIVIDE=6, p_CLKOUT3_PHASE=0.0, o_CLKOUT3=mmcm_clk208,
),
Instance("BUFG", i_I=mmcm_sys5x, o_O=self.cd_sys5x.clk),
Instance("BUFG", i_I=mmcm_sys, o_O=self.cd_sys.clk),
Instance("BUFG", i_I=mmcm_sys4x, o_O=self.cd_sys4x.clk),
Instance("BUFG", i_I=mmcm_clk208, o_O=self.cd_clk200.clk),
AsyncResetSynchronizer(self.cd_sys, ~mmcm_locked),
AsyncResetSynchronizer(self.cd_clk200, ~mmcm_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)
self.comb += self.current_clock.status.eq(self.clk_sw_fsm.o_clk_sw) self.comb += self.current_clock.status.eq(self.clk_sw_fsm.o_clk_sw)