1 /* 2 * linux/include/video/vga.h -- standard VGA chipset interaction 3 * 4 * Copyright 1999 Jeff Garzik <jgarzik@pobox.com> 5 * 6 * Copyright history from vga16fb.c: 7 * Copyright 1999 Ben Pfaff and Petr Vandrovec 8 * Based on VGA info at http://www.osdever.net/FreeVGA/home.htm 9 * Based on VESA framebuffer (c) 1998 Gerd Knorr 10 * 11 * This file is subject to the terms and conditions of the GNU General 12 * Public License. See the file COPYING in the main directory of this 13 * archive for more details. 14 * 15 */ 16 17 #ifndef LINUX_VIDEO_VGA_H 18 #define LINUX_VIDEO_VGA_H 19 20 /* Some of the code below is taken from SVGAlib. The original, 21 unmodified copyright notice for that code is below. */ 22 /* VGAlib version 1.2 - (c) 1993 Tommy Frandsen */ 23 /* */ 24 /* This library is free software; you can redistribute it and/or */ 25 /* modify it without any restrictions. This library is distributed */ 26 /* in the hope that it will be useful, but without any warranty. */ 27 28 /* Multi-chipset support Copyright 1993 Harm Hanemaayer */ 29 /* partially copyrighted (C) 1993 by Hartmut Schirmer */ 30 31 /* VGA data register ports */ 32 #define VGA_CRT_DC 0x3D5 /* CRT Controller Data Register - color emulation */ 33 #define VGA_CRT_DM 0x3B5 /* CRT Controller Data Register - mono emulation */ 34 #define VGA_ATT_R 0x3C1 /* Attribute Controller Data Read Register */ 35 #define VGA_ATT_W 0x3C0 /* Attribute Controller Data Write Register */ 36 #define VGA_GFX_D 0x3CF /* Graphics Controller Data Register */ 37 #define VGA_SEQ_D 0x3C5 /* Sequencer Data Register */ 38 #define VGA_MIS_R 0x3CC /* Misc Output Read Register */ 39 #define VGA_MIS_W 0x3C2 /* Misc Output Write Register */ 40 #define VGA_FTC_R 0x3CA /* Feature Control Read Register */ 41 #define VGA_IS1_RC 0x3DA /* Input Status Register 1 - color emulation */ 42 #define VGA_IS1_RM 0x3BA /* Input Status Register 1 - mono emulation */ 43 #define VGA_PEL_D 0x3C9 /* PEL Data Register */ 44 #define VGA_PEL_MSK 0x3C6 /* PEL mask register */ 45 46 /* EGA-specific registers */ 47 #define EGA_GFX_E0 0x3CC /* Graphics enable processor 0 */ 48 #define EGA_GFX_E1 0x3CA /* Graphics enable processor 1 */ 49 50 /* VGA index register ports */ 51 #define VGA_CRT_IC 0x3D4 /* CRT Controller Index - color emulation */ 52 #define VGA_CRT_IM 0x3B4 /* CRT Controller Index - mono emulation */ 53 #define VGA_ATT_IW 0x3C0 /* Attribute Controller Index & Data Write Register */ 54 #define VGA_GFX_I 0x3CE /* Graphics Controller Index */ 55 #define VGA_SEQ_I 0x3C4 /* Sequencer Index */ 56 #define VGA_PEL_IW 0x3C8 /* PEL Write Index */ 57 #define VGA_PEL_IR 0x3C7 /* PEL Read Index */ 58 59 /* standard VGA indexes max counts */ 60 #define VGA_CRT_C 0x19 /* Number of CRT Controller Registers */ 61 #define VGA_ATT_C 0x15 /* Number of Attribute Controller Registers */ 62 #define VGA_GFX_C 0x09 /* Number of Graphics Controller Registers */ 63 #define VGA_SEQ_C 0x05 /* Number of Sequencer Registers */ 64 #define VGA_MIS_C 0x01 /* Number of Misc Output Register */ 65 66 /* VGA misc register bit masks */ 67 #define VGA_MIS_COLOR 0x01 68 #define VGA_MIS_ENB_MEM_ACCESS 0x02 69 #define VGA_MIS_DCLK_28322_720 0x04 70 #define VGA_MIS_ENB_PLL_LOAD (0x04 | 0x08) 71 #define VGA_MIS_SEL_HIGH_PAGE 0x20 72 73 /* VGA CRT controller register indices */ 74 #define VGA_CRTC_H_TOTAL 0 75 #define VGA_CRTC_H_DISP 1 76 #define VGA_CRTC_H_BLANK_START 2 77 #define VGA_CRTC_H_BLANK_END 3 78 #define VGA_CRTC_H_SYNC_START 4 79 #define VGA_CRTC_H_SYNC_END 5 80 #define VGA_CRTC_V_TOTAL 6 81 #define VGA_CRTC_OVERFLOW 7 82 #define VGA_CRTC_PRESET_ROW 8 83 #define VGA_CRTC_MAX_SCAN 9 84 #define VGA_CRTC_CURSOR_START 0x0A 85 #define VGA_CRTC_CURSOR_END 0x0B 86 #define VGA_CRTC_START_HI 0x0C 87 #define VGA_CRTC_START_LO 0x0D 88 #define VGA_CRTC_CURSOR_HI 0x0E 89 #define VGA_CRTC_CURSOR_LO 0x0F 90 #define VGA_CRTC_V_SYNC_START 0x10 91 #define VGA_CRTC_V_SYNC_END 0x11 92 #define VGA_CRTC_V_DISP_END 0x12 93 #define VGA_CRTC_OFFSET 0x13 94 #define VGA_CRTC_UNDERLINE 0x14 95 #define VGA_CRTC_V_BLANK_START 0x15 96 #define VGA_CRTC_V_BLANK_END 0x16 97 #define VGA_CRTC_MODE 0x17 98 #define VGA_CRTC_LINE_COMPARE 0x18 99 #define VGA_CRTC_REGS VGA_CRT_C 100 101 /* VGA CRT controller bit masks */ 102 #define VGA_CR11_LOCK_CR0_CR7 0x80 /* lock writes to CR0 - CR7 */ 103 #define VGA_CR17_H_V_SIGNALS_ENABLED 0x80 104 105 /* VGA attribute controller register indices */ 106 #define VGA_ATC_PALETTE0 0x00 107 #define VGA_ATC_PALETTE1 0x01 108 #define VGA_ATC_PALETTE2 0x02 109 #define VGA_ATC_PALETTE3 0x03 110 #define VGA_ATC_PALETTE4 0x04 111 #define VGA_ATC_PALETTE5 0x05 112 #define VGA_ATC_PALETTE6 0x06 113 #define VGA_ATC_PALETTE7 0x07 114 #define VGA_ATC_PALETTE8 0x08 115 #define VGA_ATC_PALETTE9 0x09 116 #define VGA_ATC_PALETTEA 0x0A 117 #define VGA_ATC_PALETTEB 0x0B 118 #define VGA_ATC_PALETTEC 0x0C 119 #define VGA_ATC_PALETTED 0x0D 120 #define VGA_ATC_PALETTEE 0x0E 121 #define VGA_ATC_PALETTEF 0x0F 122 #define VGA_ATC_MODE 0x10 123 #define VGA_ATC_OVERSCAN 0x11 124 #define VGA_ATC_PLANE_ENABLE 0x12 125 #define VGA_ATC_PEL 0x13 126 #define VGA_ATC_COLOR_PAGE 0x14 127 128 #define VGA_AR_ENABLE_DISPLAY 0x20 129 130 /* VGA sequencer register indices */ 131 #define VGA_SEQ_RESET 0x00 132 #define VGA_SEQ_CLOCK_MODE 0x01 133 #define VGA_SEQ_PLANE_WRITE 0x02 134 #define VGA_SEQ_CHARACTER_MAP 0x03 135 #define VGA_SEQ_MEMORY_MODE 0x04 136 137 /* VGA sequencer register bit masks */ 138 #define VGA_SR01_CHAR_CLK_8DOTS 0x01 /* bit 0: character clocks 8 dots wide are generated */ 139 #define VGA_SR01_SCREEN_OFF 0x20 /* bit 5: Screen is off */ 140 #define VGA_SR02_ALL_PLANES 0x0F /* bits 3-0: enable access to all planes */ 141 #define VGA_SR04_EXT_MEM 0x02 /* bit 1: allows complete mem access to 256K */ 142 #define VGA_SR04_SEQ_MODE 0x04 /* bit 2: directs system to use a sequential addressing mode */ 143 #define VGA_SR04_CHN_4M 0x08 /* bit 3: selects modulo 4 addressing for CPU access to display memory */ 144 145 /* VGA graphics controller register indices */ 146 #define VGA_GFX_SR_VALUE 0x00 147 #define VGA_GFX_SR_ENABLE 0x01 148 #define VGA_GFX_COMPARE_VALUE 0x02 149 #define VGA_GFX_DATA_ROTATE 0x03 150 #define VGA_GFX_PLANE_READ 0x04 151 #define VGA_GFX_MODE 0x05 152 #define VGA_GFX_MISC 0x06 153 #define VGA_GFX_COMPARE_MASK 0x07 154 #define VGA_GFX_BIT_MASK 0x08 155 156 /* VGA graphics controller bit masks */ 157 #define VGA_GR06_GRAPHICS_MODE 0x01 158 159 #endif /* LINUX_VIDEO_VGA_H */ 160