diff options
Diffstat (limited to 'src/mdio_data_ti.v')
| -rw-r--r-- | src/mdio_data_ti.v | 181 |
1 files changed, 89 insertions, 92 deletions
diff --git a/src/mdio_data_ti.v b/src/mdio_data_ti.v index aef537d..b2e7cf4 100644 --- a/src/mdio_data_ti.v +++ b/src/mdio_data_ti.v @@ -1,6 +1,7 @@ /* * mdio_data_ti.v ( TI DP83867 PHY ) * + * Copyright (C) 2025 Private Island Networks Inc. * Copyright (C) 2018, 2019 Mind Chasers Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); @@ -19,14 +20,9 @@ * */ - - -`timescale 1ns /10ps - module mdio_data_ti #(parameter ADDR_SZ = 7) ( // params that alter the data returned - input [4:0] page, input [4:0] reg_addr, input [7:0] data_in_h, input [7:0] data_in_l, @@ -36,93 +32,94 @@ module mdio_data_ti #(parameter ADDR_SZ = 7) input [ADDR_SZ-1:0]ad, output [7:0]d ); - -localparam R = 8'h20; -localparam W = 8'h00; -localparam EOP = 8'h80; - -localparam REGCR = 5'h0d; -localparam ADDAR = 5'h0e; - -reg [7:0]data; - -assign d = oe ? data : 8'hzz; - -// register 22 is page -always @ (*) -begin - case (ad) - /* - Subroutine: SGMII Init ( i ) Not Needed for TI PHY, but read PHY Control Register (PHYCR), Address 0x0010 - */ - - // read the PHYCR register, SGMII Enable is bill 11 - 0: data = R|8'h10; // pg 18, reg 20 - - /* - Subroutine: Read Live Status ( s ) - */ - // read the live copper status PHYSTS (0x17) - 20 : data = R|8'h11; // read addr[17] - - /* - Subroutine: Dump Registers 0:3 - */ - 25: data = R|8'd0; - 26 : data = R|8'd1; - 27 : data = R|8'd2; - 28 : data = R|8'd3; - - /* - Subroutine: : Loopback ( 0_0.14 ) - */ - 40 : data = W|8'd0; // write addr[0] - 44 : data = 8'b01000000; // collision, speed select, reserved - 45 : data = 8'b01010001; // reset, loopback, speed, AN enable, power down, isolate, restart AN, duplex; - - // read it back - 46: data = R|8'd0; - - /* - Subroutine: : Read a register. - */ - 48: data = { 3'b001, reg_addr }; - - /* - Subroutine: : Write a register. - */ - 50: data = { 3'b000, reg_addr }; - 51: data = data_in_l; - 52: data = data_in_h; - // read it back - // 53: data = { 3'b001, reg_addr }; - - // y: extended read - 60: data = {3'b000 , REGCR }; - 61: data = 8'h1f; - 62: data = 8'h00; - // Write the extended address to 0xe - 63: data = { 3'b000, ADDAR }; - 64: data = data_in_l; - 65: data = data_in_h; - // Write 0x401f to 0xd - 66: data = { 3'b000, REGCR }; - 67: data = 8'h1f; - 68: data = 8'h40; - // Read value in extended register: read 0x0E - 69: data = { 3'b001, ADDAR }; - - // z: extended write - // Write value in extended register: 0x0E - 80: data = { 3'b000, ADDAR }; - 81: data = data_in_l; - 82: data = data_in_h; - // read it back - 83: data = { 3'b001, ADDAR }; - - default: data = R|EOP; - endcase -end + + localparam R = 8'h20; + localparam W = 8'h00; + localparam EOP = 8'h80; + + /* REGCR[15:14] holds the access function: address (00), data with no post increment (01), + data with post increment on read and writes (10) and data with post increment on writes only (11). */ + localparam REGCR = 5'h0d; // MDIO Manageable MMD access control + localparam ADDAR = 5'h0e; + + reg [7:0]data; + + assign d = oe ? data : 8'h00; + + always @ (*) + begin + case (ad) + /* + Subroutine: SGMII Init ( i ): read PHY Control Register (PHYCR), Address 0x0010 + */ + + // read the PHYCR register, SGMII Enable is bit 11 + 0: data = R|8'h10; // + + /* + Subroutine: Read Live Status ( s ) + */ + // read the live copper status PHYSTS (0x0011) + 20 : data = R|8'h11; // read addr[17] + + /* + Subroutine: Dump Registers 0:3 + */ + 25: data = R|8'd0; + 26 : data = R|8'd1; + 27 : data = R|8'd2; + 28 : data = R|8'd3; + + /* + Subroutine: : Loopback + */ + 40 : data = W|8'd0; // write addr[0] + 44 : data = 8'b01000000; // collision, speed select, reserved + 45 : data = 8'b01010001; // reset, loopback, speed, AN enable, power down, isolate, restart AN, duplex; + + // read it back + 46: data = R|8'd0; + + /* + Subroutine: : Read a register from 0 to 31. + */ + 48: data = { 3'b001, reg_addr }; + + /* + Subroutine: : Write a register from 0 to 31. + */ + 50: data = { 3'b000, reg_addr }; + 51: data = data_in_l; + 52: data = data_in_h; + // read it back + // 53: data = { 3'b001, reg_addr }; + + // y: extended read + 60: data = {3'b000 , REGCR }; + 61: data = 8'h1f; + 62: data = 8'h00; + // Write the extended address to 0xe + 63: data = { 3'b000, ADDAR }; + 64: data = data_in_l; + 65: data = data_in_h; + // Write 0x401f to 0xd + 66: data = { 3'b000, REGCR }; + 67: data = 8'h1f; + 68: data = 8'h40; + // Read value in extended register: read 0x0E + 69: data = { 3'b001, ADDAR }; + + // z: extended write + // Write value in extended register: 0x0E + 80: data = { 3'b000, ADDAR }; + 81: data = data_in_l; + 82: data = data_in_h; + // read it back + 83: data = { 3'b001, ADDAR }; + + default: data = R|EOP; + endcase + end endmodule |
