################################################################################
##
## Filename: ddr3.txt
## {{{
## Project:	10Gb Ethernet switch
##
## Purpose:	To describe how to provide access to an SDRAM controller
##		from the Wishbone bus, where such SDRAM controller uses a
##	different clock from the Wishbone bus itself.
##
## Creator:	Dan Gisselquist, Ph.D.
##		Gisselquist Technology, LLC
##
################################################################################
## }}}
## Copyright (C) 2023, Gisselquist Technology, LLC
## {{{
## This file is part of the ETH10G project.
##
## The ETH10G project contains free software and gateware, licensed under the
## Apache License, Version 2.0 (the "License").  You may not use this project,
## or this file, except in compliance with the License.  You may obtain a copy
## of the License at
## }}}
##	http://www.apache.org/licenses/LICENSE-2.0
## {{{
## Unless required by applicable law or agreed to in writing, files
## distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
## WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
## License for the specific language governing permissions and limitations
## under the License.
##
################################################################################
##
## }}}
# Wishbone 1
@PREFIX=ddr3_controller
@DEVID=DDR3_CONTROLLER
@ACCESS=@$(DEVID)_ACCESS
## LGMEMSZ is the size of the SDRAM in bytes. For a 1GB DDR3 RAM: 30 => 1GB
@$LGMEMSZ=30
@LGMEMSZ.FORMAT=%d
@$NADDR=(1<< @$(LGMEMSZ))/(@$(SLAVE.BUS.WIDTH)/8)
@$NBYTES=(1<<(@$LGMEMSZ))
@NBYTES.FORMAT=0x%08x
@$MADDR= @$(REGBASE)
@MADDR.FORMAT=0x%08x
@$NLANES=@$(SLAVE.BUS.WIDTH)/64
@SLAVE.TYPE=MEMORY
@SLAVE.BUS=wbwide
@BUS=wbwide
@LD.PERM=wx
#
@REGS.N=1
@REGS.0= 0 R_@$(DEVID) @$(DEVID)
@REGDEFS.H.DEFNS=
#define	@$(DEVID)BASE	@$[0x%08x](REGBASE)
#define	@$(DEVID)LEN	@$(NBYTES)
@BDEF.OSDEF=_BOARD_HAS_@$(DEVID)
@BDEF.OSVAL=extern char	_@$(PREFIX)[@$NBYTES];

@TOP.PORTLIST=
		// DDR3 I/O port wires
		o_ddr3_reset_n, o_ddr3_cke, o_ddr3_clk_p, o_ddr3_clk_n,
		o_ddr3_s_n, o_ddr3_ras_n, o_ddr3_cas_n, o_ddr3_we_n,
		o_ddr3_ba, o_ddr3_a,
		o_ddr3_odt, o_ddr3_dm,
		io_ddr3_dqs_p, io_ddr3_dqs_n, io_ddr3_dq
		
		
@TOP.PARAM=
    localparam real @$(DEVID)CONTROLLER_CLK_PERIOD = 10, //ns, period of clock input to this DDR3 controller module
                    DDR3_CLK_PERIOD = 2.5; //ns, period of clock input to DDR3 RAM device 
    localparam      @$(DEVID)ROW_BITS = 14,  // width of row address
                    @$(DEVID)COL_BITS = 10,  // width of column address
                    @$(DEVID)BA_BITS  =  3,  // width of bank address
                    @$(DEVID)DQ_BITS  =  8,  // Size of one octet
                    @$(DEVID)LANES = 8, //@$(NLANES), //8 lanes of DQ
                    @$(DEVID)AUX_WIDTH = 8, //must be 8 bits or more (also used in internal test and calibration)
                    @$(DEVID)SERDES_RATIO = $rtoi(@$(DEVID)CONTROLLER_CLK_PERIOD/DDR3_CLK_PERIOD),
                    //4 is the width of a single ddr3 command {cs_n, ras_n, cas_n, we_n} plus 3 (ck_en, odt, reset_n) plus bank bits plus row bits
                    @$(DEVID)CMD_LEN = 4 + 3 + @$(DEVID)BA_BITS + @$(DEVID)ROW_BITS;


@TOP.IODECL=
	// I/O declarations for the DDR3 SDRAM
	// {{{
	output	wire		o_ddr3_reset_n;
	output	wire	[1:0]	o_ddr3_cke;
	output	wire	[0:0]	o_ddr3_clk_p, o_ddr3_clk_n;
	output	wire	[1:0]   o_ddr3_s_n; // o_ddr3_s_n[1] is set to 0 since controller only support single rank
	output	wire	[0:0]   o_ddr3_ras_n, o_ddr3_cas_n, o_ddr3_we_n;
	output	wire	[@$(DEVID)BA_BITS-1:0]	o_ddr3_ba;
	output	wire	[15:0]	o_ddr3_a; //set to max of 16 bits, but only ROW_BITS bits are relevant
	output	wire	[1:0]	o_ddr3_odt;
	output	wire	[@$(DEVID)LANES-1:0]	o_ddr3_dm;
	inout	wire	[(@$(DEVID)DQ_BITS*@$(DEVID)LANES)/8-1:0]	io_ddr3_dqs_p, io_ddr3_dqs_n;
	inout	wire	[(@$(DEVID)DQ_BITS*@$(DEVID)LANES)-1:0]	io_ddr3_dq;
	// }}}
	
	
@TOP.DEFNS=
	// Wires connected to PHY interface of DDR3 controller
	// {{{
	genvar @$(PREFIX)gen_index;

	wire    [@$(DEVID)DQ_BITS*@$(DEVID)LANES*8-1:0] @$(PREFIX)_iserdes_data;
	wire    [@$(DEVID)LANES*8-1:0] @$(PREFIX)_iserdes_dqs;
	wire    [@$(DEVID)LANES*8-1:0] @$(PREFIX)_iserdes_bitslip_reference;
	wire    @$(PREFIX)_idelayctrl_rdy;
	wire    [@$(DEVID)CMD_LEN*@$(DEVID)SERDES_RATIO-1:0] @$(PREFIX)_cmd;
	wire    @$(PREFIX)_dqs_tri_control, @$(PREFIX)_dq_tri_control;
	wire    @$(PREFIX)_toggle_dqs;
	wire    [@$(DEVID)DQ_BITS*@$(DEVID)LANES*8-1:0] @$(PREFIX)_data;
	wire    [(@$(DEVID)DQ_BITS*@$(DEVID)LANES*8)/8-1:0] @$(PREFIX)_dm;
	wire    [4:0] @$(PREFIX)_odelay_data_cntvaluein, @$(PREFIX)_odelay_dqs_cntvaluein;
	wire    [4:0] @$(PREFIX)_idelay_data_cntvaluein, @$(PREFIX)_idelay_dqs_cntvaluein;
	wire    [@$(DEVID)LANES-1:0] @$(PREFIX)_odelay_data_ld, @$(PREFIX)_odelay_dqs_ld;
	wire    [@$(DEVID)LANES-1:0] @$(PREFIX)_idelay_data_ld, @$(PREFIX)_idelay_dqs_ld;
	wire    [@$(DEVID)LANES-1:0] @$(PREFIX)_bitslip;
	wire    @$(PREFIX)_write_leveling_calib;
	wire    @$(PREFIX)_reset;
	wire    [@$(DEVID)LANES-1:0] @$(PREFIX)_debug_read_dqs_p, @$(PREFIX)_debug_read_dqs_n;
	wire    @$(PREFIX)_debug_clk_p, @$(PREFIX)_debug_clk_n;
	// }}}
@TOP.MAIN=
        	// DDR3 Controller-PHY Interface
        	@$(PREFIX)_iserdes_data, @$(PREFIX)_iserdes_dqs,
        	@$(PREFIX)_iserdes_bitslip_reference,
        	@$(PREFIX)_idelayctrl_rdy,
        	@$(PREFIX)_cmd,
        	@$(PREFIX)_dqs_tri_control, @$(PREFIX)_dq_tri_control,
        	@$(PREFIX)_toggle_dqs, @$(PREFIX)_data, @$(PREFIX)_dm,
        	@$(PREFIX)_odelay_data_cntvaluein, @$(PREFIX)_odelay_dqs_cntvaluein,
        	@$(PREFIX)_idelay_data_cntvaluein, @$(PREFIX)_idelay_dqs_cntvaluein,
        	@$(PREFIX)_odelay_data_ld, @$(PREFIX)_odelay_dqs_ld,
        	@$(PREFIX)_idelay_data_ld, @$(PREFIX)_idelay_dqs_ld,
        	@$(PREFIX)_bitslip,
        	@$(PREFIX)_write_leveling_calib,
        	@$(PREFIX)_reset
@TOP.INSERT=
/*
    wire clk_locked;
    wire controller_clk, ddr3_clk, ref_ddr3_clk, ddr3_clk_90;
    clk_wiz_0 clk_ddr3
     (
      // Clock out ports
      .clk_out1(controller_clk),
      .clk_out2(ddr3_clk),
      .clk_out3(ref_ddr3_clk),
      .clk_out4(ddr3_clk_90),
      // Status and control signals
      .reset(s_reset),
      .locked(clk_locked),
     // Clock in ports
      .clk_in1(s_clk200)
     );
*/
	// DDR3 PHY Instantiation
	ddr3_phy #(
		.ROW_BITS(@$(DEVID)ROW_BITS), //width of row address
		.BA_BITS(@$(DEVID)BA_BITS), //width of bank address
		.DQ_BITS(@$(DEVID)DQ_BITS),  //width of DQ
		.LANES(@$(DEVID)LANES), //8 lanes of DQ
		.CONTROLLER_CLK_PERIOD(@$(DEVID)CONTROLLER_CLK_PERIOD), //ns, period of clock input to this DDR3 controller module
		.DDR3_CLK_PERIOD(DDR3_CLK_PERIOD), //ns, period of clock input to DDR3 RAM device 
		.ODELAY_SUPPORTED(1)
	) ddr3_phy_inst (
            // clock and reset
            .i_controller_clk(s_clk), 
            .i_ddr3_clk(s_clk4x),
            .i_ref_clk(s_clk200),
            .i_ddr3_clk_90(0), //required only when ODELAY_SUPPORTED is zero
            .i_rst_n(!s_reset),
            // Controller Interface
            .i_controller_reset(@$(PREFIX)_reset),
            .i_controller_cmd(@$(PREFIX)_cmd),
            .i_controller_dqs_tri_control(@$(PREFIX)_dqs_tri_control), 
            .i_controller_dq_tri_control(@$(PREFIX)_dq_tri_control),
            .i_controller_toggle_dqs(@$(PREFIX)_toggle_dqs),
            .i_controller_data(@$(PREFIX)_data),
            .i_controller_dm(@$(PREFIX)_dm),
            .i_controller_odelay_data_cntvaluein(@$(PREFIX)_odelay_data_cntvaluein),
            .i_controller_odelay_dqs_cntvaluein(@$(PREFIX)_odelay_dqs_cntvaluein),
            .i_controller_idelay_data_cntvaluein(@$(PREFIX)_idelay_data_cntvaluein),
            .i_controller_idelay_dqs_cntvaluein(@$(PREFIX)_idelay_dqs_cntvaluein),
            .i_controller_odelay_data_ld(@$(PREFIX)_odelay_data_ld), 
            .i_controller_odelay_dqs_ld(@$(PREFIX)_odelay_dqs_ld),
            .i_controller_idelay_data_ld(@$(PREFIX)_idelay_data_ld), 
            .i_controller_idelay_dqs_ld(@$(PREFIX)_idelay_dqs_ld),
            .i_controller_bitslip(@$(PREFIX)_bitslip),
            .i_controller_write_leveling_calib(@$(PREFIX)_write_leveling_calib),
            .o_controller_iserdes_data(@$(PREFIX)_iserdes_data),
            .o_controller_iserdes_dqs(@$(PREFIX)_iserdes_dqs),
            .o_controller_iserdes_bitslip_reference(@$(PREFIX)_iserdes_bitslip_reference),
            .o_controller_idelayctrl_rdy(@$(PREFIX)_idelayctrl_rdy),
            // DDR3 I/O Interface
            .o_ddr3_clk_p(o_ddr3_clk_p),
            .o_ddr3_clk_n(o_ddr3_clk_n),
            .o_ddr3_reset_n(o_ddr3_reset_n),
            .o_ddr3_cke(o_ddr3_cke[0]), // CKE
            .o_ddr3_cs_n(o_ddr3_s_n[0]), // chip select signal (controls rank 1 only)
            .o_ddr3_ras_n(o_ddr3_ras_n), // RAS#
            .o_ddr3_cas_n(o_ddr3_cas_n), // CAS#
            .o_ddr3_we_n(o_ddr3_we_n), // WE#
            .o_ddr3_addr(o_ddr3_a[@$(DEVID)ROW_BITS-1:0]),
            .o_ddr3_ba_addr(o_ddr3_ba),
            .io_ddr3_dq(io_ddr3_dq),
            .io_ddr3_dqs(io_ddr3_dqs_p),
            .io_ddr3_dqs_n(io_ddr3_dqs_n),
            .o_ddr3_dm(o_ddr3_dm),
            .o_ddr3_odt(o_ddr3_odt[0]), // on-die termination
            // DEBUG PHY
            .o_ddr3_debug_read_dqs_p(@$(PREFIX)_debug_read_dqs_p),
            .o_ddr3_debug_read_dqs_n(@$(PREFIX)_debug_read_dqs_n)
        );
        //assign	o_tp = {@$(PREFIX)_debug_read_dqs_n[1:0],@$(PREFIX)_debug_read_dqs_p[1:0]};
        assign o_ddr3_s_n[1] = 1; // set to 1 (disabled) since controller only supports single rank
        assign o_ddr3_cke[1] = 0; // set to 0 (disabled) since controller only supports single rank
        assign o_ddr3_odt[1] = 0; // set to 0 (disabled) since controller only supports single rank
	generate for(@$(PREFIX)gen_index = @$(DEVID)ROW_BITS;
			@$(PREFIX)gen_index < 16;
			@$(PREFIX)gen_index = @$(PREFIX)gen_index + 1)
	begin : GEN_UNUSED_@$(DEVID)_ASSIGN
		assign o_ddr3_a[@$(PREFIX)gen_index] = 0;
	end endgenerate
	/*
	// OBUFDS: Differential Output Buffer
    // 7 Series
    // Xilinx HDL Libraries Guide, version 13.4
    OBUFDS OBUFDS_inst (
    .O(o_ddr3_clk_p[1]), // Diff_p output (connect directly to top-level port)
    .OB(o_ddr3_clk_n[1]), // Diff_n output (connect directly to top-level port)
    .I(s_clk4x) // Buffer input
    );
    // End of OBUFDS_inst instantiation
 	*/
@MAIN.PORTLIST=
		// DDR3 Controller Interface
		i_@$(PREFIX)_iserdes_data, i_@$(PREFIX)_iserdes_dqs,
		i_@$(PREFIX)_iserdes_bitslip_reference,
		i_@$(PREFIX)_idelayctrl_rdy,
		o_@$(PREFIX)_cmd,
		o_@$(PREFIX)_dqs_tri_control, o_@$(PREFIX)_dq_tri_control,
		o_@$(PREFIX)_toggle_dqs, o_@$(PREFIX)_data, o_@$(PREFIX)_dm,
		o_@$(PREFIX)_odelay_data_cntvaluein, o_@$(PREFIX)_odelay_dqs_cntvaluein,
		o_@$(PREFIX)_idelay_data_cntvaluein, o_@$(PREFIX)_idelay_dqs_cntvaluein,
		o_@$(PREFIX)_odelay_data_ld, o_@$(PREFIX)_odelay_dqs_ld,
		o_@$(PREFIX)_idelay_data_ld, o_@$(PREFIX)_idelay_dqs_ld,
		o_@$(PREFIX)_bitslip,
		o_@$(PREFIX)_leveling_calib,
		o_@$(PREFIX)_reset
@MAIN.PARAM=@$(TOP.PARAM)
@MAIN.IODECL=
	// DDR3 Controller I/O declarations
	// {{{
	input wire    [@$(DEVID)DQ_BITS*@$(DEVID)LANES*8-1:0] i_@$(PREFIX)_iserdes_data;
	input wire    [@$(DEVID)LANES*8-1:0] i_@$(PREFIX)_iserdes_dqs;
	input wire    [@$(DEVID)LANES*8-1:0] i_@$(PREFIX)_iserdes_bitslip_reference;
	input wire    i_@$(PREFIX)_idelayctrl_rdy;
	output wire    [@$(DEVID)CMD_LEN*@$(DEVID)SERDES_RATIO-1:0] o_@$(PREFIX)_cmd;
	output wire    o_@$(PREFIX)_dqs_tri_control, o_@$(PREFIX)_dq_tri_control;
	output wire    o_@$(PREFIX)_toggle_dqs;
	output wire    [@$(DEVID)DQ_BITS*@$(DEVID)LANES*8-1:0] o_@$(PREFIX)_data;
	output wire    [(@$(DEVID)DQ_BITS*@$(DEVID)LANES*8)/8-1:0] o_@$(PREFIX)_dm;
	output wire    [4:0] o_@$(PREFIX)_odelay_data_cntvaluein, o_@$(PREFIX)_odelay_dqs_cntvaluein;
	output wire    [4:0] o_@$(PREFIX)_idelay_data_cntvaluein, o_@$(PREFIX)_idelay_dqs_cntvaluein;
	output wire    [@$(DEVID)LANES-1:0] o_@$(PREFIX)_odelay_data_ld, o_@$(PREFIX)_odelay_dqs_ld;
	output wire    [@$(DEVID)LANES-1:0] o_@$(PREFIX)_idelay_data_ld, o_@$(PREFIX)_idelay_dqs_ld;
	output wire    [@$(DEVID)LANES-1:0] o_@$(PREFIX)_bitslip;
	output wire    o_@$(PREFIX)_leveling_calib;
	output wire    o_@$(PREFIX)_reset;
	// }}}
@MAIN.DEFNS=
	// Verilator lint_off UNUSED
	wire	[@$(DEVID)AUX_WIDTH-1:0]	@$(PREFIX)_aux_out;
	wire	[31:0]	@$(PREFIX)_debug1, @$(PREFIX)_debug2, @$(PREFIX)_debug3;
	// Verilator lint_on  UNUSED
@MAIN.INSERT=
	////////////////////////////////////////////////////////////////////////
	//
	// DDR3 Controller instantiation
	// {{{
	ddr3_controller #(
            .CONTROLLER_CLK_PERIOD(@$(DEVID)CONTROLLER_CLK_PERIOD), //ns, period of clock input to this DDR3 controller module
            .DDR3_CLK_PERIOD(DDR3_CLK_PERIOD), //ns, period of clock input to DDR3 RAM device 
            .ROW_BITS(@$(DEVID)ROW_BITS), //width of row address
            .COL_BITS(@$(DEVID)COL_BITS), //width of column address
            .BA_BITS(@$(DEVID)BA_BITS), //width of bank address
            .DQ_BITS(@$(DEVID)DQ_BITS),  //width of DQ
            .LANES(@$(DEVID)LANES), //8 lanes of DQ
            .AUX_WIDTH(@$(DEVID)AUX_WIDTH), //
            .MICRON_SIM(0), //simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW)
            .ODELAY_SUPPORTED(1), //set to 1 when ODELAYE2 is supported
            .OPT_LOWPOWER(1), //1 = low power, 0 = low logic
            .OPT_BUS_ABORT(1)  //1 = can abort bus, 0 = no abort (i_wb_cyc will be ignored, ideal for an AXI implementation which cannot abort transaction)
	) ddr3_controller_inst (
            .i_controller_clk(i_clk), //i_controller_clk has period of CONTROLLER_CLK_PERIOD 
            .i_rst_n(!i_reset), //200MHz input clock
            // Wishbone 1 (Controller)
            @$(SLAVE.ANSIPORTLIST),
            .i_aux(0),
            .o_aux(@$(PREFIX)_aux_out),	// Leaving this empty would've caused a Verilator warning
            // Wishbone 2 (PHY)
            @$(ddr3_phy.SLAVE.ANSIPORTLIST),
            //
            // PHY interface
            .i_phy_iserdes_data(i_@$(PREFIX)_iserdes_data),
            .i_phy_iserdes_dqs(i_@$(PREFIX)_iserdes_dqs),
            .i_phy_iserdes_bitslip_reference(i_@$(PREFIX)_iserdes_bitslip_reference),
            .i_phy_idelayctrl_rdy(i_@$(PREFIX)_idelayctrl_rdy),
            .o_phy_cmd(o_@$(PREFIX)_cmd),
            .o_phy_dqs_tri_control(o_@$(PREFIX)_dqs_tri_control), 
            .o_phy_dq_tri_control(o_@$(PREFIX)_dq_tri_control),
            .o_phy_toggle_dqs(o_@$(PREFIX)_toggle_dqs),
            .o_phy_data(o_@$(PREFIX)_data),
            .o_phy_dm(o_@$(PREFIX)_dm),
            .o_phy_odelay_data_cntvaluein(o_@$(PREFIX)_odelay_data_cntvaluein),
            .o_phy_odelay_dqs_cntvaluein(o_@$(PREFIX)_odelay_dqs_cntvaluein),
            .o_phy_idelay_data_cntvaluein(o_@$(PREFIX)_idelay_data_cntvaluein), 
            .o_phy_idelay_dqs_cntvaluein(o_@$(PREFIX)_idelay_dqs_cntvaluein),
            .o_phy_odelay_data_ld(o_@$(PREFIX)_odelay_data_ld),
            .o_phy_odelay_dqs_ld(o_@$(PREFIX)_odelay_dqs_ld),
            .o_phy_idelay_data_ld(o_@$(PREFIX)_idelay_data_ld), 
            .o_phy_idelay_dqs_ld(o_@$(PREFIX)_idelay_dqs_ld),
            .o_phy_bitslip(o_@$(PREFIX)_bitslip),
            .o_phy_write_leveling_calib(o_@$(PREFIX)_leveling_calib),
            .o_phy_reset(o_@$(PREFIX)_reset),
            // Debug port
            .o_debug1(@$(PREFIX)_debug1),
            .o_debug2(@$(PREFIX)_debug2),
            .o_debug3(@$(PREFIX)_debug3)
        );
	// }}}
##
##
@PREFIX=ddr3_phy
@DEVID=DDR3_PHY
@ACCESS=@$(DEVID)_ACCESS
@$NADDR=128
@SLAVE.TYPE=OTHER
@SLAVE.BUS=wb32
@SLAVE.ANSPREFIX=wb2_
#
@REGS.N=1
@REGS.0= 0 R_@$(DEVID) @$(DEVID)
@BDEF.DEFN=

## Define the structure of your PHY controller here.  How are the bits all
## layout out?  What register names do you have?  That should all go here.

typedef	struct	@$(DEVID)_S {
	unsigned	ph_something;
} @$(DEVID);

@BDEF.IONAME=_@$(PREFIX)
@BDEF.IOTYPE=@$(DEVID)
@BDEF.OSDEF=_BOARD_HAS_@$(DEVID)
@BDEF.OSVAL=static volatile @$(BDEF.IOTYPE) *const @$(BDEF.IONAME) = ((@$(BDEF.IOTYPE) *)@$[0x%08x](REGBASE));

@RTL.MAKE.GROUP= DDR3
@RTL.MAKE.SUBD=ddr3
@RTL.MAKE.FILES= ddr3_controller.v ddr3_phy.v