vi.v
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/************************************************************************\
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
\************************************************************************/
// $Id: vi.v,v 1.10 2003/05/15 01:32:36 whs Exp $
////////////////////////////////////////////////////////////////////////
//
// Project Reality
//
// module: vi
// description: Top level for video interface.
//
// designer: Phil Gossett
// date: 5/29/95
//
////////////////////////////////////////////////////////////////////////
module vi(clk, vclk, reset_l,
cbus_read_enable, cbus_write_enable, cbus_select, cbus_command,
dma_start, dma_last, dma_grant, read_grant, dbus_data, ebus_data,
dma_request, read_request, vbus_data, vbus_sync, vbus_clock_enable_l,
vi_int, cbus_din, cbus_dout);
`include "vi.vh"
input clk; // system clock
input vclk; // video clock
input reset_l; // system reset_l
input cbus_read_enable; // enable cbus read mux
input cbus_write_enable; // enable cbus tristate drivers
input [1:0] cbus_select; // cbus data select
input [2:0] cbus_command; // cbus data type
input dma_start; // first dbus word flag
input dma_last; // last dbus word flag
input dma_grant; // DMA request granted
input read_grant; // read request granted
input [DBUS_DATA_SIZE-1:0] dbus_data; // DMA bus
input [EBUS_DATA_SIZE-1:0] ebus_data; // Extended DMA bus
output dma_request; // request a DMA cycle
output read_request; // request a read response cycle
output [6:0] vbus_data; // video data out
output vbus_sync; // video sync out
output vbus_clock_enable_l; // video clock out enable
output vi_int; // video interrupt
input [31:0] cbus_din; // IO bus
output [31:0] cbus_dout; // IO bus
wire [DRAM_ADDRESS_SIZE-1:0] dma_address;
wire [DMA_LENGTH_SIZE-1:0] dma_length;
wire block_grant;
wire [31:0] reg_read_data;
wire [31:0] reg_write_data;
wire [VI_REG_ADDRESS_SIZE-1:0] reg_address;
wire reg_write_enable;
wire [16:0] ctrl; // bits
wire [23:0] origin; // bytes
wire [11:0] width; // pixels
wire [9:0] v_int; // lines
wire [9:0] v_current; // lines
wire [7:0] hsync_width; // pixels
wire [7:0] burst_width; // pixels
wire [3:0] vsync_width; // lines
wire [9:0] burst_start; // pixels
wire [9:0] v_sync_period; // lines
wire [11:0] h_sync_period; // clocks
wire [4:0] leap_pattern; // fields
wire [11:0] hsync_leap_b; // clocks
wire [11:0] hsync_leap_a; // clocks
wire [9:0] h_video_end; // pixels
wire [9:0] h_video_start; // pixels
wire [9:0] v_video_end; // lines
wire [9:0] v_video_start; // lines
wire [9:0] v_burst_end; // lines
wire [9:0] v_burst_start; // lines
wire [11:0] x_scale; // 2.10
wire [11:0] y_scale; // 2.10
wire [11:0] x_offset; // 2.10
wire [11:0] y_offset; // 2.10
wire [DRAM_ADDRESS_SIZE-1:0] block_address;
wire [DMA_LENGTH_SIZE-1:0] block_length;
wire [3:0] block_word;
wire bank_sel;
wire block_start;
wire [1:0] block_count;
wire block_partial;
wire pre_int;
wire horizontal_flag;
wire [5:0] rand;
wire [4:0] hfrac;
wire [4:0] vfrac;
wire [7:0] rgb0i;
wire [7:0] rgb1i;
wire [7:0] rgb2i;
wire [7:0] rgb3i;
wire [2:0] cvg0i;
wire [2:0] cvg1i;
wire [2:0] cvg2i;
wire [2:0] cvg3i;
wire synci;
wire wen_a;
wire wen_b;
wire [3:0] read_addr;
wire [3:0] addr_a;
wire [3:0] addr_b;
wire [EBUS_DATA_SIZE+DBUS_DATA_SIZE-1:0] data_a;
wire [EBUS_DATA_SIZE+DBUS_DATA_SIZE-1:0] data_b;
wire [EBUS_DATA_SIZE+DBUS_DATA_SIZE-1:0] din;
vi_dma vidma (.clk(clk), .reset_l(reset_l),
.cbus_read_enable(cbus_read_enable),
.cbus_write_enable(cbus_write_enable),
.cbus_select(cbus_select), .cbus_command(cbus_command),
.read_grant(read_grant), .dma_address(dma_address),
.dma_length(dma_length), .reg_read_data(reg_read_data),
.read_request(read_request), .reg_write_data(reg_write_data),
.reg_address(reg_address), .reg_write_enable(reg_write_enable),
.cbus_din(cbus_din),
.cbus_dout(cbus_dout));
vi_controller vicontroller (.clk(clk), .reset_l(reset_l),
.dma_grant(dma_grant), .dma_start(dma_start), .dma_last(dma_last),
.reg_write_data(reg_write_data), .reg_address(reg_address),
.reg_write_enable(reg_write_enable), .v_current(v_current),
.block_address(block_address), .block_length(block_length),
.block_word(block_word), .bank_sel(bank_sel),
.block_start(block_start), .block_count(block_count),
.read_addr(read_addr),
.pre_int(pre_int), .horizontal_flag(horizontal_flag),
.di( {dbus_data[63:48], ebus_data[7:6],
dbus_data[47:32], ebus_data[5:4],
dbus_data[31:16], ebus_data[3:2],
dbus_data[15:0], ebus_data[1:0]}),
.dout_a(data_a), .dout_b(data_b),
.block_partial(block_partial), .wen_a(wen_a), .wen_b(wen_b),
.addr_a(addr_a), .addr_b(addr_b), .do(din),
.dma_address(dma_address), .dma_length(dma_length),
.dma_request(dma_request), .block_grant(block_grant),
.reg_read_data(reg_read_data),
.vbus_clock_enable_l(vbus_clock_enable_l),
.ctrl(ctrl), .origin(origin), .width(width),
.v_int(v_int), .hsync_width(hsync_width),
.burst_width(burst_width), .vsync_width(vsync_width),
.burst_start(burst_start), .v_sync_period(v_sync_period),
.h_sync_period(h_sync_period), .leap_pattern(leap_pattern),
.hsync_leap_b(hsync_leap_b), .hsync_leap_a(hsync_leap_a),
.h_video_end(h_video_end), .h_video_start(h_video_start),
.v_video_end(v_video_end), .v_video_start(v_video_start),
.v_burst_end(v_burst_end), .v_burst_start(v_burst_start),
.x_scale(x_scale), .y_scale(y_scale),
.x_offset(x_offset), .y_offset(y_offset),
.vi_int(vi_int) );
vi_sync visync (.vclk(vclk), .reset_l(reset_l),
.type(ctrl[1:0]), .serrate(ctrl[6]), .aa_mode(ctrl[9:8]),
.pixel_adv(ctrl[15:12]), .origin(origin), .width(width),
.v_int(v_int), .hsync_width(hsync_width),
.burst_width(burst_width), .vsync_width(vsync_width),
.burst_start(burst_start), .v_sync_period(v_sync_period),
.h_sync_period(h_sync_period), .leap_pattern(leap_pattern),
.hsync_leap_b(hsync_leap_b), .hsync_leap_a(hsync_leap_a),
.h_video_end(h_video_end), .h_video_start(h_video_start),
.v_video_end(v_video_end), .v_video_start(v_video_start),
.v_burst_end(v_burst_end), .v_burst_start(v_burst_start),
.x_scale(x_scale), .y_scale(y_scale),
.x_offset(x_offset), .y_offset(y_offset),
.data_a(data_a), .data_b(data_b),
.block_partial(block_partial), .block_grant(block_grant),
.block_address(block_address), .block_length(block_length),
.block_word(block_word), .bank_sel(bank_sel),
.block_start(block_start), .block_count(block_count),
.read_addr(read_addr),
.pre_int(pre_int), .horizontal_flag(horizontal_flag),
.hfrac(hfrac), .vfrac(vfrac), .v_current(v_current),
.rgb0i(rgb0i), .rgb1i(rgb1i), .rgb2i(rgb2i), .rgb3i(rgb3i),
.cvg0i(cvg0i), .cvg1i(cvg1i), .cvg2i(cvg2i), .cvg3i(cvg3i),
.synci(synci));
vi_pipe vipipe (.vclk(vclk), .type(ctrl[1:0]), .aa_off(ctrl[9]),
.dither_filter_enable(ctrl[16]), .divot_enable(ctrl[4]),
.gamma_enable(ctrl[3]), .gamma_dither_enable(ctrl[2]),
.rand(rand), .hfrac(hfrac), .vfrac(vfrac),
.rgb0i(rgb0i), .rgb1i(rgb1i), .rgb2i(rgb2i), .rgb3i(rgb3i),
.cvg0i(cvg0i), .cvg1i(cvg1i), .cvg2i(cvg2i), .cvg3i(cvg3i),
.synci(synci),
.srgb(vbus_data), .sync(vbus_sync));
vi_rand virand (.vclk(vclk), .reset_l(reset_l), .rand(rand));
vi_spanbuf spanbufa (.wen(wen_a), .clk(clk), .vclk(vclk), .aa(addr_a),
.ab(addr_b), .di(din), .dout(data_a));
vi_spanbuf spanbufb (.wen(wen_b), .clk(clk), .vclk(vclk), .aa(addr_a),
.ab(addr_b), .di(din), .dout(data_b));
endmodule