From 8fd13061451191745e518dbc6679d8a7f15b0800 Mon Sep 17 00:00:00 2001 From: linuswck Date: Thu, 5 Oct 2023 11:28:45 +0800 Subject: [PATCH] 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 --- src/gateware/zynq_clocking.py | 70 ++++++++++++++++++++++------------- 1 file changed, 45 insertions(+), 25 deletions(-) diff --git a/src/gateware/zynq_clocking.py b/src/gateware/zynq_clocking.py index 72bb894f..b85c3656 100644 --- a/src/gateware/zynq_clocking.py +++ b/src/gateware/zynq_clocking.py @@ -69,6 +69,8 @@ class SYSCRG(Module, AutoCSR): # assumes bootstrap clock is same freq as main and sys output self.clock_domains.cd_sys = ClockDomain() 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() @@ -78,11 +80,6 @@ class SYSCRG(Module, AutoCSR): period = 1e9/freq - pll_locked = Signal() - pll_sys = Signal() - pll_sys4x = Signal() - fb_clk = Signal() - self.submodules.clk_sw_fsm = ClockSwitchFSM() if clk_sw is None: @@ -91,32 +88,55 @@ class SYSCRG(Module, AutoCSR): else: 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 += [ - Instance("PLLE2_ADV", - p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked, - p_BANDWIDTH="HIGH", - p_REF_JITTER1=0.001, - p_CLKIN1_PERIOD=period, i_CLKIN1=main_clk, - p_CLKIN2_PERIOD=period, i_CLKIN2=bootstrap_clk, - i_CLKINSEL=self.clk_sw_fsm.o_clk_sw, + Instance("MMCME2_ADV", + p_STARTUP_WAIT="FALSE", o_LOCKED=mmcm_locked, + p_BANDWIDTH="HIGH", + p_REF_JITTER1=0.001, + p_CLKIN1_PERIOD=period, i_CLKIN1=main_clk, + p_CLKIN2_PERIOD=period, i_CLKIN2=bootstrap_clk, + i_CLKINSEL=self.clk_sw_fsm.o_clk_sw, - # VCO @ 1.5GHz when using 125MHz input - # 1.2GHz for 100MHz (zc706) - p_CLKFBOUT_MULT=12, p_DIVCLK_DIVIDE=1, - i_CLKFBIN=fb_clk, - i_RST=self.clk_sw_fsm.o_reset, + # VCO @ 1.25GHz + p_CLKFBOUT_MULT_F=10, p_DIVCLK_DIVIDE=1, + i_CLKFBIN=mmcm_fb_clk, + 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, - o_CLKOUT0=pll_sys4x, + p_CLKOUT0_DIVIDE_F=2.5, p_CLKOUT0_PHASE=0.0, o_CLKOUT0=mmcm_sys4x, - p_CLKOUT1_DIVIDE=12, p_CLKOUT1_PHASE=0.0, - o_CLKOUT1=pll_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), + # 125MHz + p_CLKOUT1_DIVIDE=10, p_CLKOUT1_PHASE=0.0, o_CLKOUT1=mmcm_sys, - 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)