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