/*
* linux/include/video/vga.h -- standard VGA chipset interaction
*
* Copyright 1999 Jeff Garzik <jgarzik@pobox.com>
*
* Copyright history from vga16fb.c:
* Copyright 1999 Ben Pfaff and Petr Vandrovec
* Based on VGA info at http://www.osdever.net/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/types.h>
#include <linux/io.h>
#include <
asm/vga.h>
#include <
asm/byteorder.h>
#define VGA_FB_PHYS_BASE
0xA0000
/* VGA framebuffer I/O base */
#define VGA_FB_PHYS_SIZE
65536 /* VGA framebuffer I/O size */
/* 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
/* VGA State Save and Restore */
#define VGA_SAVE_FONT0
1 /* save/restore plane 2 fonts */
#define VGA_SAVE_FONT1
2 /* save/restore plane 3 fonts */
#define VGA_SAVE_TEXT
4 /* save/restore plane 0/1 fonts */
#define VGA_SAVE_FONTS
7 /* save/restore all fonts */
#define VGA_SAVE_MODE
8 /* save/restore video mode */
#define VGA_SAVE_CMAP
16 /* save/restore color map/DAC */
struct vgastate {
void __iomem *vgabase;
/* mmio base, if supported */
unsigned long membase;
/* VGA window base, 0 for default - 0xA000 */
__u32 memsize;
/* VGA window size, 0 for default 64K */
__u32 flags;
/* what state[s] to save (see VGA_SAVE_*) */
__u32 depth;
/* current fb depth, not important */
__u32 num_attr;
/* number of att registers, 0 for default */
__u32 num_crtc;
/* number of crt registers, 0 for default */
__u32 num_gfx;
/* number of gfx registers, 0 for default */
__u32 num_seq;
/* number of seq registers, 0 for default */
void *vidstate;
};
extern int save_vga(
struct vgastate *state);
extern int restore_vga(
struct vgastate *state);
static inline unsigned char vga_mm_r (
void __iomem *regbase,
unsigned short port)
{
return readb (regbase + port);
}
static inline void vga_mm_w (
void __iomem *regbase,
unsigned short port,
unsigned char val)
{
writeb (val, regbase + port);
}
static inline void vga_mm_w_fast (
void __iomem *regbase,
unsigned short port,
unsigned char reg,
unsigned char val)
{
writew (VGA_OUT16VAL (val, reg), regbase + port);
}
/*
* generic VGA port read/write
*/
#ifdef CONFIG_HAS_IOPORT
static inline unsigned char vga_io_r (
unsigned short port)
{
return inb_p(port);
}
static inline void vga_io_w (
unsigned short port,
unsigned char val)
{
outb_p(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_r (
void __iomem *regbase,
unsigned short port)
{
if (regbase)
return vga_mm_r (regbase, port);
else
return vga_io_r (port);
}
static inline void vga_w (
void __iomem *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 (
void __iomem *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);
}
#else /* CONFIG_HAS_IOPORT */
static inline unsigned char vga_r (
void __iomem *regbase,
unsigned short port)
{
return vga_mm_r (regbase, port);
}
static inline void vga_w (
void __iomem *regbase,
unsigned short port,
unsigned char val)
{
vga_mm_w (regbase, port, val);
}
static inline void vga_w_fast (
void __iomem *regbase,
unsigned short port,
unsigned char reg,
unsigned char val)
{
vga_mm_w_fast (regbase, port, reg, val);
}
#endif /* CONFIG_HAS_IOPORT */
/*
* VGA CRTC register read/write
*/
static inline unsigned char vga_rcrt (
void __iomem *regbase,
unsigned char reg)
{
vga_w (regbase, VGA_CRT_IC, reg);
return vga_r (regbase, VGA_CRT_DC);
}
static inline void vga_wcrt (
void __iomem *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 */
}
#ifdef CONFIG_HAS_IOPORT
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 */
}
#endif /* CONFIG_HAS_IOPORT */
static inline unsigned char vga_mm_rcrt (
void __iomem *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 (
void __iomem *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 (
void __iomem *regbase,
unsigned char reg)
{
vga_w (regbase, VGA_SEQ_I, reg);
return vga_r (regbase, VGA_SEQ_D);
}
static inline void vga_wseq (
void __iomem *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 */
}
#ifdef CONFIG_HAS_IOPORT
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 */
}
#endif /* CONFIG_HAS_IOPORT */
static inline unsigned char vga_mm_rseq (
void __iomem *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 (
void __iomem *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 (
void __iomem *regbase,
unsigned char reg)
{
vga_w (regbase, VGA_GFX_I, reg);
return vga_r (regbase, VGA_GFX_D);
}
static inline void vga_wgfx (
void __iomem *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 */
}
#ifdef CONFIG_HAS_IOPORT
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 */
}
#endif /* CONFIG_HAS_IOPORT */
static inline unsigned char vga_mm_rgfx (
void __iomem *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 (
void __iomem *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 (
void __iomem *regbase,
unsigned char reg)
{
vga_w (regbase, VGA_ATT_IW, reg);
return vga_r (regbase, VGA_ATT_R);
}
static inline void vga_wattr (
void __iomem *regbase,
unsigned char reg,
unsigned char val)
{
vga_w (regbase, VGA_ATT_IW, reg);
vga_w (regbase, VGA_ATT_W, val);
}
#ifdef CONFIG_HAS_IOPORT
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);
}
#endif /* CONFIG_HAS_IOPORT */
static inline unsigned char vga_mm_rattr (
void __iomem *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 (
void __iomem *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__ */