diff options
Diffstat (limited to 'src/include/pc80')
| -rw-r--r-- | src/include/pc80/vga.h | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/include/pc80/vga.h b/src/include/pc80/vga.h new file mode 100644 index 0000000000..fd90db072b --- /dev/null +++ b/src/include/pc80/vga.h @@ -0,0 +1,228 @@ +/* + * + * modified + * by Steve M. Gehlbach <steve@kesa.com> + * + * Originally from linux/drivers/video/vga16.c by + * Ben Pfaff <pfaffben@debian.org> and Petr Vandrovec <VANDROVE@vc.cvut.cz> + * Copyright 1999 Ben Pfaff <pfaffben@debian.org> and Petr Vandrovec <VANDROVE@vc.cvut.cz> + * Based on VGA info at http://www.goodnet.com/~tinara/FreeVGA/home.htm + * Based on VESA framebuffer (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de> + * + */ + +#ifndef VGA_H_INCL +#define VGA_H_INCL 1 + +#include <arch/io.h> + +#define u8 unsigned char +#define u16 unsigned short +#define u32 unsigned int +#define __u32 u32 + +#define VERROR -1 +#define CHAR_HEIGHT 16 +#define LINES 25 +#define COLS 80 + +// macros for writing to vga regs +#define write_crtc(data,addr) outb(addr,CRT_IC); outb(data,CRT_DC) +#define write_att(data,addr) inb(IS1_RC); inb(0x80); outb(addr,ATT_IW); inb(0x80); outb(data,ATT_IW); inb(0x80) +#define write_seq(data,addr) outb(addr,SEQ_I); outb(data,SEQ_D) +#define write_gra(data,addr) outb(addr,GRA_I); outb(data,GRA_D) +u8 read_seq_b(u16 addr); +u8 read_gra_b(u16 addr); +u8 read_crtc_b(u16 addr); +u8 read_att_b(u16 addr); + + +#ifdef VGA_HARDWARE_FIXUP +void vga_hardware_fixup(void); +#else +#define vga_hardware_fixup() do{} while(0) +#endif + +#define SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active */ +#define SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */ +#define SYNC_EXT 4 /* external sync */ +#define SYNC_COMP_HIGH_ACT 8 /* composite sync high active */ +#define SYNC_BROADCAST 16 /* broadcast video timings */ + /* vtotal = 144d/288n/576i => PAL */ + /* vtotal = 121d/242n/484i => NTSC */ + +#define SYNC_ON_GREEN 32 /* sync on green */ + +#define VMODE_NONINTERLACED 0 /* non interlaced */ +#define VMODE_INTERLACED 1 /* interlaced */ +#define VMODE_DOUBLE 2 /* double scan */ +#define VMODE_MASK 255 + +#define VMODE_YWRAP 256 /* ywrap instead of panning */ +#define VMODE_SMOOTH_XPAN 512 /* smooth xpan possible (internally used) */ +#define VMODE_CONUPDATE 512 /* don't update x/yoffset */ + +/* VGA data register ports */ +#define CRT_DC 0x3D5 /* CRT Controller Data Register - color emulation */ +#define CRT_DM 0x3B5 /* CRT Controller Data Register - mono emulation */ +#define ATT_R 0x3C1 /* Attribute Controller Data Read Register */ +#define GRA_D 0x3CF /* Graphics Controller Data Register */ +#define SEQ_D 0x3C5 /* Sequencer Data Register */ + +#define MIS_R 0x3CC // Misc Output Read Register +#define MIS_W 0x3C2 // Misc Output Write Register + +#define IS1_RC 0x3DA /* Input Status Register 1 - color emulation */ +#define IS1_RM 0x3BA /* Input Status Register 1 - mono emulation */ +#define PEL_D 0x3C9 /* PEL Data Register */ +#define PEL_MSK 0x3C6 /* PEL mask register */ + +/* EGA-specific registers */ +#define GRA_E0 0x3CC /* Graphics enable processor 0 */ +#define GRA_E1 0x3CA /* Graphics enable processor 1 */ + + +/* VGA index register ports */ +#define CRT_IC 0x3D4 /* CRT Controller Index - color emulation */ +#define CRT_IM 0x3B4 /* CRT Controller Index - mono emulation */ +#define ATT_IW 0x3C0 /* Attribute Controller Index & Data Write Register */ +#define GRA_I 0x3CE /* Graphics Controller Index */ +#define SEQ_I 0x3C4 /* Sequencer Index */ +#define PEL_IW 0x3C8 /* PEL Write Index */ +#define PEL_IR 0x3C7 /* PEL Read Index */ + +/* standard VGA indexes max counts */ +#define CRTC_C 25 /* 25 CRT Controller Registers sequentially set*/ + // the remainder are not in the par array +#define ATT_C 21 /* 21 Attribute Controller Registers */ +#define GRA_C 9 /* 9 Graphics Controller Registers */ +#define SEQ_C 5 /* 5 Sequencer Registers */ +#define MIS_C 1 /* 1 Misc Output Register */ + +#define CRTC_H_TOTAL 0 +#define CRTC_H_DISP 1 +#define CRTC_H_BLANK_START 2 +#define CRTC_H_BLANK_END 3 +#define CRTC_H_SYNC_START 4 +#define CRTC_H_SYNC_END 5 +#define CRTC_V_TOTAL 6 +#define CRTC_OVERFLOW 7 +#define CRTC_PRESET_ROW 8 +#define CRTC_MAX_SCAN 9 +#define CRTC_CURSOR_START 0x0A +#define CRTC_CURSOR_END 0x0B +#define CRTC_START_HI 0x0C +#define CRTC_START_LO 0x0D +#define CRTC_CURSOR_HI 0x0E +#define CRTC_CURSOR_LO 0x0F +#define CRTC_V_SYNC_START 0x10 +#define CRTC_V_SYNC_END 0x11 +#define CRTC_V_DISP_END 0x12 +#define CRTC_OFFSET 0x13 +#define CRTC_UNDERLINE 0x14 +#define CRTC_V_BLANK_START 0x15 +#define CRTC_V_BLANK_END 0x16 +#define CRTC_MODE 0x17 +#define CRTC_LINE_COMPARE 0x18 + +#define ATC_MODE 0x10 +#define ATC_OVERSCAN 0x11 +#define ATC_PLANE_ENABLE 0x12 +#define ATC_PEL 0x13 +#define ATC_COLOR_PAGE 0x14 + +#define SEQ_CLOCK_MODE 0x01 +#define SEQ_PLANE_WRITE 0x02 +#define SEQ_CHARACTER_MAP 0x03 +#define SEQ_MEMORY_MODE 0x04 + +#define GDC_SR_VALUE 0x00 +#define GDC_SR_ENABLE 0x01 +#define GDC_COMPARE_VALUE 0x02 +#define GDC_DATA_ROTATE 0x03 +#define GDC_PLANE_READ 0x04 +#define GDC_MODE 0x05 +#define GDC_MISC 0x06 +#define GDC_COMPARE_MASK 0x07 +#define GDC_BIT_MASK 0x08 + +// text attributes +#define VGA_ATTR_CLR_RED 0x4 +#define VGA_ATTR_CLR_GRN 0x2 +#define VGA_ATTR_CLR_BLU 0x1 +#define VGA_ATTR_CLR_YEL (VGA_ATTR_CLR_RED | VGA_ATTR_CLR_GRN) +#define VGA_ATTR_CLR_CYN (VGA_ATTR_CLR_GRN | VGA_ATTR_CLR_BLU) +#define VGA_ATTR_CLR_MAG (VGA_ATTR_CLR_BLU | VGA_ATTR_CLR_RED) +#define VGA_ATTR_CLR_BLK 0 +#define VGA_ATTR_CLR_WHT (VGA_ATTR_CLR_RED | VGA_ATTR_CLR_GRN | VGA_ATTR_CLR_BLU) +#define VGA_ATTR_BNK 0x80 +#define VGA_ATTR_ITN 0x08 + +/* + * vga register parameters + * these are copied to the + * registers. + * + */ +struct vga_par { + u8 crtc[CRTC_C]; + u8 atc[ATT_C]; + u8 gdc[GRA_C]; + u8 seq[SEQ_C]; + u8 misc; // the misc register, MIS_W + u8 vss; +}; + + +/* Interpretation of offset for color fields: All offsets are from the right, + * inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you + * can use the offset as right argument to <<). A pixel afterwards is a bit + * stream and is written to video memory as that unmodified. This implies + * big-endian byte order if bits_per_pixel is greater than 8. + */ +struct fb_bitfield { + __u32 offset; /* beginning of bitfield */ + __u32 length; /* length of bitfield */ + __u32 msb_right; /* != 0 : Most significant bit is */ + /* right */ +}; + +struct screeninfo { + __u32 xres; /* visible resolution */ + __u32 yres; + __u32 xres_virtual; /* virtual resolution */ + __u32 yres_virtual; + __u32 xoffset; /* offset from virtual to visible */ + __u32 yoffset; /* resolution */ + + __u32 bits_per_pixel; /* guess what */ + __u32 grayscale; /* != 0 Graylevels instead of colors */ + + struct fb_bitfield red; /* bitfield in fb mem if true color, */ + struct fb_bitfield green; /* else only length is significant */ + struct fb_bitfield blue; + struct fb_bitfield transp; /* transparency */ + + __u32 nonstd; /* != 0 Non standard pixel format */ + + __u32 activate; /* see FB_ACTIVATE_* */ + + __u32 height; /* height of picture in mm */ + __u32 width; /* width of picture in mm */ + + __u32 accel_flags; /* acceleration flags (hints) */ + + /* Timing: All values in pixclocks, except pixclock (of course) */ + __u32 pixclock; /* pixel clock in ps (pico seconds) */ + __u32 left_margin; /* time from sync to picture */ + __u32 right_margin; /* time from picture to sync */ + __u32 upper_margin; /* time from sync to picture */ + __u32 lower_margin; + __u32 hsync_len; /* length of horizontal sync */ + __u32 vsync_len; /* length of vertical sync */ + __u32 sync; /* sync polarity */ + __u32 vmode; /* interlaced etc */ + __u32 reserved[6]; /* Reserved for future compatibility */ +}; + +#endif |