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459 lines
14 KiB
459 lines
14 KiB
/* |
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* linux/include/video/vga.h -- standard VGA chipset interaction |
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* |
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* Copyright 1999 Jeff Garzik <[email protected]> |
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* |
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* Copyright history from vga16fb.c: |
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* Copyright 1999 Ben Pfaff and Petr Vandrovec |
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* Based on VGA info at http://www.osdever.net/FreeVGA/home.htm |
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* Based on VESA framebuffer (c) 1998 Gerd Knorr |
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* |
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* This file is subject to the terms and conditions of the GNU General |
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* Public License. See the file COPYING in the main directory of this |
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* archive for more details. |
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* |
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*/ |
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#ifndef __linux_video_vga_h__ |
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#define __linux_video_vga_h__ |
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#include <linux/types.h> |
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#include <linux/io.h> |
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#include <asm/vga.h> |
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#include <asm/byteorder.h> |
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/* Some of the code below is taken from SVGAlib. The original, |
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unmodified copyright notice for that code is below. */ |
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/* VGAlib version 1.2 - (c) 1993 Tommy Frandsen */ |
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/* */ |
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/* This library is free software; you can redistribute it and/or */ |
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/* modify it without any restrictions. This library is distributed */ |
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/* in the hope that it will be useful, but without any warranty. */ |
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/* Multi-chipset support Copyright 1993 Harm Hanemaayer */ |
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/* partially copyrighted (C) 1993 by Hartmut Schirmer */ |
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/* VGA data register ports */ |
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#define VGA_CRT_DC 0x3D5 /* CRT Controller Data Register - color emulation */ |
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#define VGA_CRT_DM 0x3B5 /* CRT Controller Data Register - mono emulation */ |
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#define VGA_ATT_R 0x3C1 /* Attribute Controller Data Read Register */ |
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#define VGA_ATT_W 0x3C0 /* Attribute Controller Data Write Register */ |
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#define VGA_GFX_D 0x3CF /* Graphics Controller Data Register */ |
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#define VGA_SEQ_D 0x3C5 /* Sequencer Data Register */ |
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#define VGA_MIS_R 0x3CC /* Misc Output Read Register */ |
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#define VGA_MIS_W 0x3C2 /* Misc Output Write Register */ |
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#define VGA_FTC_R 0x3CA /* Feature Control Read Register */ |
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#define VGA_IS1_RC 0x3DA /* Input Status Register 1 - color emulation */ |
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#define VGA_IS1_RM 0x3BA /* Input Status Register 1 - mono emulation */ |
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#define VGA_PEL_D 0x3C9 /* PEL Data Register */ |
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#define VGA_PEL_MSK 0x3C6 /* PEL mask register */ |
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/* EGA-specific registers */ |
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#define EGA_GFX_E0 0x3CC /* Graphics enable processor 0 */ |
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#define EGA_GFX_E1 0x3CA /* Graphics enable processor 1 */ |
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/* VGA index register ports */ |
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#define VGA_CRT_IC 0x3D4 /* CRT Controller Index - color emulation */ |
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#define VGA_CRT_IM 0x3B4 /* CRT Controller Index - mono emulation */ |
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#define VGA_ATT_IW 0x3C0 /* Attribute Controller Index & Data Write Register */ |
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#define VGA_GFX_I 0x3CE /* Graphics Controller Index */ |
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#define VGA_SEQ_I 0x3C4 /* Sequencer Index */ |
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#define VGA_PEL_IW 0x3C8 /* PEL Write Index */ |
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#define VGA_PEL_IR 0x3C7 /* PEL Read Index */ |
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/* standard VGA indexes max counts */ |
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#define VGA_CRT_C 0x19 /* Number of CRT Controller Registers */ |
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#define VGA_ATT_C 0x15 /* Number of Attribute Controller Registers */ |
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#define VGA_GFX_C 0x09 /* Number of Graphics Controller Registers */ |
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#define VGA_SEQ_C 0x05 /* Number of Sequencer Registers */ |
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#define VGA_MIS_C 0x01 /* Number of Misc Output Register */ |
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/* VGA misc register bit masks */ |
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#define VGA_MIS_COLOR 0x01 |
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#define VGA_MIS_ENB_MEM_ACCESS 0x02 |
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#define VGA_MIS_DCLK_28322_720 0x04 |
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#define VGA_MIS_ENB_PLL_LOAD (0x04 | 0x08) |
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#define VGA_MIS_SEL_HIGH_PAGE 0x20 |
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/* VGA CRT controller register indices */ |
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#define VGA_CRTC_H_TOTAL 0 |
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#define VGA_CRTC_H_DISP 1 |
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#define VGA_CRTC_H_BLANK_START 2 |
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#define VGA_CRTC_H_BLANK_END 3 |
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#define VGA_CRTC_H_SYNC_START 4 |
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#define VGA_CRTC_H_SYNC_END 5 |
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#define VGA_CRTC_V_TOTAL 6 |
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#define VGA_CRTC_OVERFLOW 7 |
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#define VGA_CRTC_PRESET_ROW 8 |
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#define VGA_CRTC_MAX_SCAN 9 |
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#define VGA_CRTC_CURSOR_START 0x0A |
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#define VGA_CRTC_CURSOR_END 0x0B |
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#define VGA_CRTC_START_HI 0x0C |
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#define VGA_CRTC_START_LO 0x0D |
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#define VGA_CRTC_CURSOR_HI 0x0E |
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#define VGA_CRTC_CURSOR_LO 0x0F |
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#define VGA_CRTC_V_SYNC_START 0x10 |
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#define VGA_CRTC_V_SYNC_END 0x11 |
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#define VGA_CRTC_V_DISP_END 0x12 |
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#define VGA_CRTC_OFFSET 0x13 |
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#define VGA_CRTC_UNDERLINE 0x14 |
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#define VGA_CRTC_V_BLANK_START 0x15 |
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#define VGA_CRTC_V_BLANK_END 0x16 |
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#define VGA_CRTC_MODE 0x17 |
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#define VGA_CRTC_LINE_COMPARE 0x18 |
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#define VGA_CRTC_REGS VGA_CRT_C |
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/* VGA CRT controller bit masks */ |
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#define VGA_CR11_LOCK_CR0_CR7 0x80 /* lock writes to CR0 - CR7 */ |
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#define VGA_CR17_H_V_SIGNALS_ENABLED 0x80 |
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/* VGA attribute controller register indices */ |
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#define VGA_ATC_PALETTE0 0x00 |
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#define VGA_ATC_PALETTE1 0x01 |
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#define VGA_ATC_PALETTE2 0x02 |
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#define VGA_ATC_PALETTE3 0x03 |
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#define VGA_ATC_PALETTE4 0x04 |
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#define VGA_ATC_PALETTE5 0x05 |
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#define VGA_ATC_PALETTE6 0x06 |
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#define VGA_ATC_PALETTE7 0x07 |
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#define VGA_ATC_PALETTE8 0x08 |
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#define VGA_ATC_PALETTE9 0x09 |
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#define VGA_ATC_PALETTEA 0x0A |
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#define VGA_ATC_PALETTEB 0x0B |
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#define VGA_ATC_PALETTEC 0x0C |
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#define VGA_ATC_PALETTED 0x0D |
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#define VGA_ATC_PALETTEE 0x0E |
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#define VGA_ATC_PALETTEF 0x0F |
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#define VGA_ATC_MODE 0x10 |
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#define VGA_ATC_OVERSCAN 0x11 |
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#define VGA_ATC_PLANE_ENABLE 0x12 |
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#define VGA_ATC_PEL 0x13 |
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#define VGA_ATC_COLOR_PAGE 0x14 |
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#define VGA_AR_ENABLE_DISPLAY 0x20 |
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/* VGA sequencer register indices */ |
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#define VGA_SEQ_RESET 0x00 |
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#define VGA_SEQ_CLOCK_MODE 0x01 |
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#define VGA_SEQ_PLANE_WRITE 0x02 |
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#define VGA_SEQ_CHARACTER_MAP 0x03 |
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#define VGA_SEQ_MEMORY_MODE 0x04 |
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/* VGA sequencer register bit masks */ |
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#define VGA_SR01_CHAR_CLK_8DOTS 0x01 /* bit 0: character clocks 8 dots wide are generated */ |
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#define VGA_SR01_SCREEN_OFF 0x20 /* bit 5: Screen is off */ |
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#define VGA_SR02_ALL_PLANES 0x0F /* bits 3-0: enable access to all planes */ |
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#define VGA_SR04_EXT_MEM 0x02 /* bit 1: allows complete mem access to 256K */ |
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#define VGA_SR04_SEQ_MODE 0x04 /* bit 2: directs system to use a sequential addressing mode */ |
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#define VGA_SR04_CHN_4M 0x08 /* bit 3: selects modulo 4 addressing for CPU access to display memory */ |
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/* VGA graphics controller register indices */ |
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#define VGA_GFX_SR_VALUE 0x00 |
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#define VGA_GFX_SR_ENABLE 0x01 |
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#define VGA_GFX_COMPARE_VALUE 0x02 |
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#define VGA_GFX_DATA_ROTATE 0x03 |
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#define VGA_GFX_PLANE_READ 0x04 |
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#define VGA_GFX_MODE 0x05 |
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#define VGA_GFX_MISC 0x06 |
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#define VGA_GFX_COMPARE_MASK 0x07 |
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#define VGA_GFX_BIT_MASK 0x08 |
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/* VGA graphics controller bit masks */ |
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#define VGA_GR06_GRAPHICS_MODE 0x01 |
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/* macro for composing an 8-bit VGA register index and value |
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* into a single 16-bit quantity */ |
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#define VGA_OUT16VAL(v, r) (((v) << 8) | (r)) |
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/* decide whether we should enable the faster 16-bit VGA register writes */ |
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#ifdef __LITTLE_ENDIAN |
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#define VGA_OUTW_WRITE |
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#endif |
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/* VGA State Save and Restore */ |
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#define VGA_SAVE_FONT0 1 /* save/restore plane 2 fonts */ |
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#define VGA_SAVE_FONT1 2 /* save/restore plane 3 fonts */ |
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#define VGA_SAVE_TEXT 4 /* save/restore plane 0/1 fonts */ |
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#define VGA_SAVE_FONTS 7 /* save/restore all fonts */ |
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#define VGA_SAVE_MODE 8 /* save/restore video mode */ |
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#define VGA_SAVE_CMAP 16 /* save/restore color map/DAC */ |
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struct vgastate { |
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void __iomem *vgabase; /* mmio base, if supported */ |
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unsigned long membase; /* VGA window base, 0 for default - 0xA000 */ |
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__u32 memsize; /* VGA window size, 0 for default 64K */ |
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__u32 flags; /* what state[s] to save (see VGA_SAVE_*) */ |
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__u32 depth; /* current fb depth, not important */ |
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__u32 num_attr; /* number of att registers, 0 for default */ |
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__u32 num_crtc; /* number of crt registers, 0 for default */ |
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__u32 num_gfx; /* number of gfx registers, 0 for default */ |
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__u32 num_seq; /* number of seq registers, 0 for default */ |
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void *vidstate; |
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}; |
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extern int save_vga(struct vgastate *state); |
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extern int restore_vga(struct vgastate *state); |
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/* |
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* generic VGA port read/write |
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*/ |
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static inline unsigned char vga_io_r (unsigned short port) |
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{ |
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return inb_p(port); |
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} |
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static inline void vga_io_w (unsigned short port, unsigned char val) |
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{ |
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outb_p(val, port); |
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} |
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static inline void vga_io_w_fast (unsigned short port, unsigned char reg, |
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unsigned char val) |
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{ |
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outw(VGA_OUT16VAL (val, reg), port); |
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} |
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static inline unsigned char vga_mm_r (void __iomem *regbase, unsigned short port) |
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{ |
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return readb (regbase + port); |
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} |
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static inline void vga_mm_w (void __iomem *regbase, unsigned short port, unsigned char val) |
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{ |
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writeb (val, regbase + port); |
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} |
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static inline void vga_mm_w_fast (void __iomem *regbase, unsigned short port, |
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unsigned char reg, unsigned char val) |
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{ |
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writew (VGA_OUT16VAL (val, reg), regbase + port); |
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} |
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static inline unsigned char vga_r (void __iomem *regbase, unsigned short port) |
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{ |
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if (regbase) |
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return vga_mm_r (regbase, port); |
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else |
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return vga_io_r (port); |
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} |
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static inline void vga_w (void __iomem *regbase, unsigned short port, unsigned char val) |
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{ |
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if (regbase) |
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vga_mm_w (regbase, port, val); |
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else |
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vga_io_w (port, val); |
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} |
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static inline void vga_w_fast (void __iomem *regbase, unsigned short port, |
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unsigned char reg, unsigned char val) |
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{ |
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if (regbase) |
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vga_mm_w_fast (regbase, port, reg, val); |
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else |
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vga_io_w_fast (port, reg, val); |
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} |
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/* |
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* VGA CRTC register read/write |
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*/ |
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static inline unsigned char vga_rcrt (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_w (regbase, VGA_CRT_IC, reg); |
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return vga_r (regbase, VGA_CRT_DC); |
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} |
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static inline void vga_wcrt (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_w_fast (regbase, VGA_CRT_IC, reg, val); |
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#else |
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vga_w (regbase, VGA_CRT_IC, reg); |
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vga_w (regbase, VGA_CRT_DC, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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static inline unsigned char vga_io_rcrt (unsigned char reg) |
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{ |
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vga_io_w (VGA_CRT_IC, reg); |
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return vga_io_r (VGA_CRT_DC); |
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} |
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static inline void vga_io_wcrt (unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_io_w_fast (VGA_CRT_IC, reg, val); |
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#else |
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vga_io_w (VGA_CRT_IC, reg); |
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vga_io_w (VGA_CRT_DC, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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static inline unsigned char vga_mm_rcrt (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_mm_w (regbase, VGA_CRT_IC, reg); |
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return vga_mm_r (regbase, VGA_CRT_DC); |
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} |
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static inline void vga_mm_wcrt (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_mm_w_fast (regbase, VGA_CRT_IC, reg, val); |
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#else |
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vga_mm_w (regbase, VGA_CRT_IC, reg); |
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vga_mm_w (regbase, VGA_CRT_DC, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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/* |
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* VGA sequencer register read/write |
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*/ |
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static inline unsigned char vga_rseq (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_w (regbase, VGA_SEQ_I, reg); |
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return vga_r (regbase, VGA_SEQ_D); |
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} |
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static inline void vga_wseq (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_w_fast (regbase, VGA_SEQ_I, reg, val); |
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#else |
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vga_w (regbase, VGA_SEQ_I, reg); |
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vga_w (regbase, VGA_SEQ_D, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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static inline unsigned char vga_io_rseq (unsigned char reg) |
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{ |
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vga_io_w (VGA_SEQ_I, reg); |
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return vga_io_r (VGA_SEQ_D); |
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} |
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static inline void vga_io_wseq (unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_io_w_fast (VGA_SEQ_I, reg, val); |
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#else |
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vga_io_w (VGA_SEQ_I, reg); |
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vga_io_w (VGA_SEQ_D, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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static inline unsigned char vga_mm_rseq (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_mm_w (regbase, VGA_SEQ_I, reg); |
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return vga_mm_r (regbase, VGA_SEQ_D); |
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} |
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static inline void vga_mm_wseq (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_mm_w_fast (regbase, VGA_SEQ_I, reg, val); |
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#else |
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vga_mm_w (regbase, VGA_SEQ_I, reg); |
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vga_mm_w (regbase, VGA_SEQ_D, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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/* |
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* VGA graphics controller register read/write |
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*/ |
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static inline unsigned char vga_rgfx (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_w (regbase, VGA_GFX_I, reg); |
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return vga_r (regbase, VGA_GFX_D); |
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} |
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static inline void vga_wgfx (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_w_fast (regbase, VGA_GFX_I, reg, val); |
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#else |
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vga_w (regbase, VGA_GFX_I, reg); |
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vga_w (regbase, VGA_GFX_D, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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static inline unsigned char vga_io_rgfx (unsigned char reg) |
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{ |
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vga_io_w (VGA_GFX_I, reg); |
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return vga_io_r (VGA_GFX_D); |
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} |
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static inline void vga_io_wgfx (unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_io_w_fast (VGA_GFX_I, reg, val); |
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#else |
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vga_io_w (VGA_GFX_I, reg); |
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vga_io_w (VGA_GFX_D, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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static inline unsigned char vga_mm_rgfx (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_mm_w (regbase, VGA_GFX_I, reg); |
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return vga_mm_r (regbase, VGA_GFX_D); |
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} |
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static inline void vga_mm_wgfx (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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#ifdef VGA_OUTW_WRITE |
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vga_mm_w_fast (regbase, VGA_GFX_I, reg, val); |
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#else |
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vga_mm_w (regbase, VGA_GFX_I, reg); |
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vga_mm_w (regbase, VGA_GFX_D, val); |
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#endif /* VGA_OUTW_WRITE */ |
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} |
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/* |
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* VGA attribute controller register read/write |
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*/ |
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static inline unsigned char vga_rattr (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_w (regbase, VGA_ATT_IW, reg); |
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return vga_r (regbase, VGA_ATT_R); |
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} |
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static inline void vga_wattr (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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vga_w (regbase, VGA_ATT_IW, reg); |
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vga_w (regbase, VGA_ATT_W, val); |
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} |
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static inline unsigned char vga_io_rattr (unsigned char reg) |
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{ |
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vga_io_w (VGA_ATT_IW, reg); |
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return vga_io_r (VGA_ATT_R); |
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} |
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static inline void vga_io_wattr (unsigned char reg, unsigned char val) |
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{ |
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vga_io_w (VGA_ATT_IW, reg); |
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vga_io_w (VGA_ATT_W, val); |
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} |
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static inline unsigned char vga_mm_rattr (void __iomem *regbase, unsigned char reg) |
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{ |
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vga_mm_w (regbase, VGA_ATT_IW, reg); |
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return vga_mm_r (regbase, VGA_ATT_R); |
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} |
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static inline void vga_mm_wattr (void __iomem *regbase, unsigned char reg, unsigned char val) |
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{ |
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vga_mm_w (regbase, VGA_ATT_IW, reg); |
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vga_mm_w (regbase, VGA_ATT_W, val); |
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} |
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#endif /* __linux_video_vga_h__ */
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