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fpga/mqnic/Alveo: Rework AU55 clocking

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich 2023-11-15 11:28:35 -08:00
parent cccd983975
commit 534cd3735f
2 changed files with 62 additions and 68 deletions
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65
fpga/mqnic/Alveo/fpga_100g/rtl/fpga_au55.v
View File

@ -224,7 +224,8 @@ parameter AXIS_ETH_RX_USER_WIDTH = (PTP_TS_ENABLE ? PTP_TS_WIDTH : 0) + 1;
wire pcie_user_clk; wire pcie_user_clk;
wire pcie_user_reset; wire pcie_user_reset;
wire clk_161mhz_ref_int; wire clk_100mhz_1_ibufg;
wire clk_100mhz_1_int;
wire clk_50mhz_mmcm_out; wire clk_50mhz_mmcm_out;
wire clk_125mhz_mmcm_out; wire clk_125mhz_mmcm_out;
@ -241,19 +242,35 @@ wire mmcm_rst = pcie_user_reset;
wire mmcm_locked; wire mmcm_locked;
wire mmcm_clkfb; wire mmcm_clkfb;
IBUFGDS #(
.DIFF_TERM("FALSE"),
.IBUF_LOW_PWR("FALSE")
)
clk_100mhz_1_ibufg_inst (
.O (clk_100mhz_1_ibufg),
.I (clk_100mhz_1_p),
.IB (clk_100mhz_1_n)
);
BUFG
clk_100mhz_1_bufg_inst (
.I(clk_100mhz_1_ibufg),
.O(clk_100mhz_1_int)
);
// MMCM instance // MMCM instance
// 161.13 MHz in, 50 MHz + 125 MHz out // 100 MHz in, 125 MHz + 50 MHz out
// PFD range: 10 MHz to 500 MHz // PFD range: 10 MHz to 500 MHz
// VCO range: 800 MHz to 1600 MHz // VCO range: 800 MHz to 1600 MHz
// M = 128, D = 15 sets Fvco = 1375 MHz (in range) // M = 10, D = 1 sets Fvco = 1000 MHz
// Divide by 27.5 to get output frequency of 50 MHz // Divide by 8 to get output frequency of 125 MHz
// Divide by 11 to get output frequency of 125 MHz // Divide by 20 to get output frequency of 50 MHz
MMCME4_BASE #( MMCME4_BASE #(
.BANDWIDTH("OPTIMIZED"), .BANDWIDTH("OPTIMIZED"),
.CLKOUT0_DIVIDE_F(27.5), .CLKOUT0_DIVIDE_F(8),
.CLKOUT0_DUTY_CYCLE(0.5), .CLKOUT0_DUTY_CYCLE(0.5),
.CLKOUT0_PHASE(0), .CLKOUT0_PHASE(0),
.CLKOUT1_DIVIDE(11), .CLKOUT1_DIVIDE(20),
.CLKOUT1_DUTY_CYCLE(0.5), .CLKOUT1_DUTY_CYCLE(0.5),
.CLKOUT1_PHASE(0), .CLKOUT1_PHASE(0),
.CLKOUT2_DIVIDE(1), .CLKOUT2_DIVIDE(1),
@ -271,22 +288,22 @@ MMCME4_BASE #(
.CLKOUT6_DIVIDE(1), .CLKOUT6_DIVIDE(1),
.CLKOUT6_DUTY_CYCLE(0.5), .CLKOUT6_DUTY_CYCLE(0.5),
.CLKOUT6_PHASE(0), .CLKOUT6_PHASE(0),
.CLKFBOUT_MULT_F(128), .CLKFBOUT_MULT_F(10),
.CLKFBOUT_PHASE(0), .CLKFBOUT_PHASE(0),
.DIVCLK_DIVIDE(15), .DIVCLK_DIVIDE(1),
.REF_JITTER1(0.010), .REF_JITTER1(0.010),
.CLKIN1_PERIOD(6.206), .CLKIN1_PERIOD(10.000),
.STARTUP_WAIT("FALSE"), .STARTUP_WAIT("FALSE"),
.CLKOUT4_CASCADE("FALSE") .CLKOUT4_CASCADE("FALSE")
) )
clk_mmcm_inst ( clk_mmcm_inst (
.CLKIN1(clk_161mhz_ref_int), .CLKIN1(clk_100mhz_1_int),
.CLKFBIN(mmcm_clkfb), .CLKFBIN(mmcm_clkfb),
.RST(mmcm_rst), .RST(mmcm_rst),
.PWRDWN(1'b0), .PWRDWN(1'b0),
.CLKOUT0(clk_50mhz_mmcm_out), .CLKOUT0(clk_125mhz_mmcm_out),
.CLKOUT0B(), .CLKOUT0B(),
.CLKOUT1(clk_125mhz_mmcm_out), .CLKOUT1(clk_50mhz_mmcm_out),
.CLKOUT1B(), .CLKOUT1B(),
.CLKOUT2(), .CLKOUT2(),
.CLKOUT2B(), .CLKOUT2B(),
@ -991,8 +1008,6 @@ wire qsfp0_mgt_refclk;
wire qsfp0_mgt_refclk_int; wire qsfp0_mgt_refclk_int;
wire qsfp0_mgt_refclk_bufg; wire qsfp0_mgt_refclk_bufg;
assign clk_161mhz_ref_int = qsfp0_mgt_refclk_bufg;
IBUFDS_GTE4 ibufds_gte4_qsfp0_mgt_refclk_inst ( IBUFDS_GTE4 ibufds_gte4_qsfp0_mgt_refclk_inst (
.I (qsfp0_mgt_refclk_p), .I (qsfp0_mgt_refclk_p),
.IB (qsfp0_mgt_refclk_n), .IB (qsfp0_mgt_refclk_n),
@ -1281,29 +1296,11 @@ wire [HBM_CH-1:0] m_axi_hbm_rready;
wire [HBM_CH-1:0] hbm_status; wire [HBM_CH-1:0] hbm_status;
wire clk_100mhz_1_ibufg;
IBUFGDS #(
.DIFF_TERM("FALSE"),
.IBUF_LOW_PWR("FALSE")
)
clk_100mhz_1_ibufg_inst (
.O (clk_100mhz_1_ibufg),
.I (clk_100mhz_1_p),
.IB (clk_100mhz_1_n)
);
generate generate
if (HBM_ENABLE) begin if (HBM_ENABLE) begin
wire hbm_ref_clk; wire hbm_ref_clk = clk_100mhz_1_int;
BUFG
hbm_ref_clk_bufg_inst (
.I(clk_100mhz_1_ibufg),
.O(hbm_ref_clk)
);
wire hbm_cattrip_1; wire hbm_cattrip_1;
wire hbm_cattrip_2; wire hbm_cattrip_2;

65
fpga/mqnic/Alveo/fpga_25g/rtl/fpga_au55.v
View File

@ -233,7 +233,8 @@ parameter AXIS_ETH_RX_USER_WIDTH = (PTP_TS_ENABLE ? PTP_TS_WIDTH : 0) + 1;
wire pcie_user_clk; wire pcie_user_clk;
wire pcie_user_reset; wire pcie_user_reset;
wire clk_161mhz_ref_int; wire clk_100mhz_1_ibufg;
wire clk_100mhz_1_int;
wire clk_50mhz_mmcm_out; wire clk_50mhz_mmcm_out;
wire clk_125mhz_mmcm_out; wire clk_125mhz_mmcm_out;
@ -250,19 +251,35 @@ wire mmcm_rst = pcie_user_reset;
wire mmcm_locked; wire mmcm_locked;
wire mmcm_clkfb; wire mmcm_clkfb;
IBUFGDS #(
.DIFF_TERM("FALSE"),
.IBUF_LOW_PWR("FALSE")
)
clk_100mhz_1_ibufg_inst (
.O (clk_100mhz_1_ibufg),
.I (clk_100mhz_1_p),
.IB (clk_100mhz_1_n)
);
BUFG
clk_100mhz_1_bufg_inst (
.I(clk_100mhz_1_ibufg),
.O(clk_100mhz_1_int)
);
// MMCM instance // MMCM instance
// 161.13 MHz in, 50 MHz + 125 MHz out // 100 MHz in, 125 MHz + 50 MHz out
// PFD range: 10 MHz to 500 MHz // PFD range: 10 MHz to 500 MHz
// VCO range: 800 MHz to 1600 MHz // VCO range: 800 MHz to 1600 MHz
// M = 128, D = 15 sets Fvco = 1375 MHz (in range) // M = 10, D = 1 sets Fvco = 1000 MHz
// Divide by 27.5 to get output frequency of 50 MHz // Divide by 8 to get output frequency of 125 MHz
// Divide by 11 to get output frequency of 125 MHz // Divide by 20 to get output frequency of 50 MHz
MMCME4_BASE #( MMCME4_BASE #(
.BANDWIDTH("OPTIMIZED"), .BANDWIDTH("OPTIMIZED"),
.CLKOUT0_DIVIDE_F(27.5), .CLKOUT0_DIVIDE_F(8),
.CLKOUT0_DUTY_CYCLE(0.5), .CLKOUT0_DUTY_CYCLE(0.5),
.CLKOUT0_PHASE(0), .CLKOUT0_PHASE(0),
.CLKOUT1_DIVIDE(11), .CLKOUT1_DIVIDE(20),
.CLKOUT1_DUTY_CYCLE(0.5), .CLKOUT1_DUTY_CYCLE(0.5),
.CLKOUT1_PHASE(0), .CLKOUT1_PHASE(0),
.CLKOUT2_DIVIDE(1), .CLKOUT2_DIVIDE(1),
@ -280,22 +297,22 @@ MMCME4_BASE #(
.CLKOUT6_DIVIDE(1), .CLKOUT6_DIVIDE(1),
.CLKOUT6_DUTY_CYCLE(0.5), .CLKOUT6_DUTY_CYCLE(0.5),
.CLKOUT6_PHASE(0), .CLKOUT6_PHASE(0),
.CLKFBOUT_MULT_F(128), .CLKFBOUT_MULT_F(10),
.CLKFBOUT_PHASE(0), .CLKFBOUT_PHASE(0),
.DIVCLK_DIVIDE(15), .DIVCLK_DIVIDE(1),
.REF_JITTER1(0.010), .REF_JITTER1(0.010),
.CLKIN1_PERIOD(6.206), .CLKIN1_PERIOD(10.000),
.STARTUP_WAIT("FALSE"), .STARTUP_WAIT("FALSE"),
.CLKOUT4_CASCADE("FALSE") .CLKOUT4_CASCADE("FALSE")
) )
clk_mmcm_inst ( clk_mmcm_inst (
.CLKIN1(clk_161mhz_ref_int), .CLKIN1(clk_100mhz_1_int),
.CLKFBIN(mmcm_clkfb), .CLKFBIN(mmcm_clkfb),
.RST(mmcm_rst), .RST(mmcm_rst),
.PWRDWN(1'b0), .PWRDWN(1'b0),
.CLKOUT0(clk_50mhz_mmcm_out), .CLKOUT0(clk_125mhz_mmcm_out),
.CLKOUT0B(), .CLKOUT0B(),
.CLKOUT1(clk_125mhz_mmcm_out), .CLKOUT1(clk_50mhz_mmcm_out),
.CLKOUT1B(), .CLKOUT1B(),
.CLKOUT2(), .CLKOUT2(),
.CLKOUT2B(), .CLKOUT2B(),
@ -973,8 +990,6 @@ wire qsfp0_mgt_refclk;
wire qsfp0_mgt_refclk_int; wire qsfp0_mgt_refclk_int;
wire qsfp0_mgt_refclk_bufg; wire qsfp0_mgt_refclk_bufg;
assign clk_161mhz_ref_int = qsfp0_mgt_refclk_bufg;
IBUFDS_GTE4 ibufds_gte4_qsfp0_mgt_refclk_inst ( IBUFDS_GTE4 ibufds_gte4_qsfp0_mgt_refclk_inst (
.I (qsfp0_mgt_refclk_p), .I (qsfp0_mgt_refclk_p),
.IB (qsfp0_mgt_refclk_n), .IB (qsfp0_mgt_refclk_n),
@ -1319,29 +1334,11 @@ wire [HBM_CH-1:0] m_axi_hbm_rready;
wire [HBM_CH-1:0] hbm_status; wire [HBM_CH-1:0] hbm_status;
wire clk_100mhz_1_ibufg;
IBUFGDS #(
.DIFF_TERM("FALSE"),
.IBUF_LOW_PWR("FALSE")
)
clk_100mhz_1_ibufg_inst (
.O (clk_100mhz_1_ibufg),
.I (clk_100mhz_1_p),
.IB (clk_100mhz_1_n)
);
generate generate
if (HBM_ENABLE) begin if (HBM_ENABLE) begin
wire hbm_ref_clk; wire hbm_ref_clk = clk_100mhz_1_int;
BUFG
hbm_ref_clk_bufg_inst (
.I(clk_100mhz_1_ibufg),
.O(hbm_ref_clk)
);
wire hbm_cattrip_1; wire hbm_cattrip_1;
wire hbm_cattrip_2; wire hbm_cattrip_2;