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/* SVGAlib, Copyright 1993 Harm Hanemaayer */
/* VGAlib version 1.2 - (c) 1993 Tommy Frandsen */
/* partially copyrighted (C) 1993 by Hartmut Schirmer */

/* Internal definitions. */

#ifndef _LIBVGA_H
#define _LIBVGA_H

#include <string.h>

#include <stdint.h>
#include "ll/sys/cdefs.h"

__BEGIN_DECLS

//typedef unsigned int CARD32;
//typedef unsigned short CARD16;
//typedef unsigned char CARD8;

/* --------------------- Macro definitions shared by library modules */

/* 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 */

/* 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 */

/* 8514/MACH regs we need outside of the mach32 driver.. */
#define PEL8514_D       0x2ED
#define PEL8514_IW      0x2EC
#define PEL8514_IR      0x2EB
#define PEL8514_MSK     0x2EA

/* EGA-specific registers */

#define GRA_E0  0x3CC           /* Graphics enable processor 0 */
#define GRA_E1  0x3CA           /* Graphics enable processor 1 */

/* standard VGA indexes max counts */
#define CRT_C   24              /* 24 CRT Controller Registers */
#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 */

/* VGA registers saving indexes */
#define CRT     0               /* CRT Controller Registers start */
#define ATT     (CRT+CRT_C)     /* Attribute Controller Registers start */
#define GRA     (ATT+ATT_C)     /* Graphics Controller Registers start */
#define SEQ     (GRA+GRA_C)     /* Sequencer Registers */
#define MIS     (SEQ+SEQ_C)     /* General Registers */
#define EXT     (MIS+MIS_C)     /* SVGA Extended Registers */

/* Shorthands for chipset (driver) specific calls */
#define chipset_saveregs __svgalib_driverspecs->saveregs
#define chipset_setregs __svgalib_driverspecs->setregs
#define chipset_unlock __svgalib_driverspecs->unlock
#define chipset_test __svgalib_driverspecs->test
#define chipset_setpage __svgalib_driverspecs->__svgalib_setpage
#define chipset_setmode __svgalib_driverspecs->setmode
#define chipset_modeavailable __svgalib_driverspecs->modeavailable
#define chipset_getmodeinfo __svgalib_driverspecs->getmodeinfo
#define chipset_cursor __svgalib_driverspecs->cursor

/* Shorthands for internal variables and functions */
#define CI      __svgalib_cur_info
#define SM      __svgalib_sparse_mem
#define GM      __svgalib_graph_mem
#define CM      __svgalib_cur_mode
#define VMEM    __svgalib_videomemoryused
#define DREP    __svgalib_driver_report
#define CRITICAL __svgalib_critical
#define COL     __svgalib_cur_color
#define CHIPSET __svgalib_chipset
#define SCREENON __svgalib_screenon
#define MODEX   __svgalib_modeX
#define MODEFLAGS __svgalib_modeflags
#define infotable __svgalib_infotable

#define SVGADRV          2
#define STDVGADRV        1
#define STDVGAMODE(mode) (chipset_modeavailable(mode) == STDVGADRV)
#define SVGAMODE(mode)   (chipset_modeavailable(mode) == SVGADRV)

#define GRAPH_BASE 0xA0000
#define FONT_BASE  0xA0000
#define GRAPH_SIZE 0x10000
#define FONT_SIZE  (0x2000 * 4) /* 2.0.x kernel can use 2 512 char. fonts */
#define GPLANE16   G640x350x16

/* graphics mode information */
struct info {
    int xdim;
    int ydim;
    int colors;
    int xbytes;
    int bytesperpixel;
};

/* --------------------- Variable definitions shared by library modules */

#define BANKED_POINTER __svgalib_banked_pointer
#define LINEAR_POINTER __svgalib_linear_pointer
#define MMIO_POINTER __svgalib_mmio_pointer

extern int __svgalib_CRT_I;             /* current CRT index register address */
extern int __svgalib_CRT_D;             /* current CRT data register address */
extern int __svgalib_IS1_R;             /* current input status register address */
extern uint8_t * BANKED_POINTER, * LINEAR_POINTER;
extern uint8_t *MMIO_POINTER;
extern uint8_t *SPARSE_MMIO;
extern unsigned long __svgalib_banked_mem_base, __svgalib_banked_mem_size;
extern unsigned long __svgalib_mmio_base, __svgalib_mmio_size;
extern unsigned long __svgalib_linear_mem_base, __svgalib_linear_mem_size;
extern unsigned long __svgalib_mmio_base, __svgalib_mmio_size;
extern struct info CI;          /* current video parameters */
extern int COL;                 /* current color            */
extern int CM;                  /* current video mode       */
extern struct info infotable[];
extern int SCREENON;            /* screen visible if != 0 */
extern unsigned long __svgalib_graph_base;
extern unsigned char *GM;       /* graphics memory frame */
extern int MODEX;               /* TRUE after vga_setmodeX() */
extern int MODEFLAGS;           /* copy of flags of current modeinfo->flags */

extern int __svgalib_mem_fd;
extern int __svgalib_tty_fd;
extern int __svgalib_nosigint;
extern int __svgalib_mouse_fd;
extern int __svgalib_kbd_fd;
extern int __svgalib_runinbackground;
extern int __svgalib_vgacolormode;

extern unsigned char __svgalib_novga;
extern unsigned char __svgalib_textprog;
extern unsigned char __svgalib_secondary;
extern unsigned char __svgalib_emulatepage;
extern unsigned char __svgalib_novccontrol;
extern unsigned char __svgalib_m_ignore_dx;
extern unsigned char __svgalib_m_ignore_dy;
extern unsigned char __svgalib_m_ignore_dz;

extern char *__joystick_devicenames[4];

extern int __svgalib_cursor_status;

/* --------------------- Function definitions shared by library modules */

extern int (*__svgalib_inmisc)(void);
extern void (*__svgalib_outmisc)(int);
extern int (*__svgalib_incrtc)(int);
extern void (*__svgalib_outcrtc)(int,int);
extern int (*__svgalib_inseq)(int);
extern void (*__svgalib_outseq)(int,int);
extern int  (*__svgalib_ingra)(int);
extern void (*__svgalib_outgra)(int,int);
extern int  (*__svgalib_inatt)(int);
extern void (*__svgalib_outatt)(int,int);
extern void (*__svgalib_attscreen)(int);
extern void (*__svgalib_inpal)(int,int*,int*,int*);
extern void (*__svgalib_outpal)(int,int,int,int);
extern int (*__svgalib_inis1)(void);

extern int __svgalib_setregs(const unsigned char *regs);
extern int __svgalib_saveregs(unsigned char *regs);
extern void __svgalib_dumpregs(const unsigned char regs[], int n);
extern void __svgalib_get_perm(void);
extern int __svgalib_getchipset(int set_chipset);
extern int __svgalib_name2number(char *modename);
extern void __svgalib_delay(void);
extern int __svgalib_addmode(int xdim, int ydim, int cols, int xbytes, int bytespp);
extern void __svgalib_waitvtactive(void);
extern void __svgalib_open_devconsole(void);
extern void (*__svgalib_mouse_eventhandler) (int, int, int, int, int, int, int);
extern void (*__svgalib_keyboard_eventhandler) (int, int);
extern void __joystick_flip_vc(int acquire);
extern char *__svgalib_TextProg_argv[16]; /* should be enough */
extern char *__svgalib_TextProg;
extern int __svgalib_VESA_savebitmap;
extern int __svgalib_VESA_textmode;
extern unsigned char __svgalib_vesatext;
extern int __svgalib_mapkeyname(const char *keyname);
extern void __svgalib_mouse_update_keymap(void);
extern int __svgalib_vgacolor(void);
extern void __svgalib_cursor_restore(void);
extern void map_mmio(void);
extern void map_mem(void);
extern void map_linear(unsigned long, unsigned long);
extern void unmap_linear(unsigned long);
extern void __svgalib_emul_setpage(int);

#if 0
/* remove this part ? */
extern void __svgalib_releasevt_signal(int n);
extern void __svgalib_acquirevt_signal(int n);
#endif

#define gr_readb(off)           (((volatile uint8_t *)GM)[(off)])
#define gr_readw(off)           (*(volatile uint16_t*)((GM)+(off)))
#define gr_readl(off)           (*(volatile uint32_t*)((GM)+(off)))
#define gr_writeb(v,off)        (GM[(off)] = (v))
#define gr_writew(v,off)        (*(uint16_t*)((GM)+(off)) = (v))
#define gr_writel(v,off)        (*(uint32_t*)((GM)+(off)) = (v))

extern void port_out(int value, int port);
extern void port_outw(int value, int port);
extern void port_outl(int value, int port);
extern void port_rep_outb(unsigned char* string, int length, int port);

extern int port_in(int port);
extern int port_inw(int port);
extern int port_inl(int port);

/* Note that the arguments of outb/w are reversed compared with the */
/* kernel sources. The XFree86 drivers also use this format. */
#undef inb
#undef inw
#undef inl
#undef outb
#undef outw
#undef outl

#define inb port_in
#define inw port_inw
#define inl port_inl
#define outb(port, value) port_out(value, port)
#define outw(port, value) port_outw(value, port)
#define outl(port, value) port_outl(value, port)

/* Background things */

extern unsigned char *__svgalib_give_graph_red(void);
extern unsigned char *__svgalib_give_graph_green(void);
extern unsigned char *__svgalib_give_graph_blue(void);
 
#define zero_sa_mask(maskptr) memset(maskptr, 0, sizeof(sigset_t))

#if 1

#define SVGALIB_ACQUIRE_SIG SIGUSR2
#define SVGALIB_RELEASE_SIG SIGUSR1

#else

#define SVGALIB_ACQUIRE_SIG SIGUNUSED
#define SVGALIB_RELEASE_SIG SIGPROF

#endif

//#define DEBUG_TRACE

#ifdef DEBUG_TRACE
#define DTP(x) cprintf x
#else
#define DTP(x)
#endif

#ifdef DEBUG
#define DPRINTF cprintf
#else
#define DPRINTF
#endif

__END_DECLS

#endif /* _LIBVGA_H */