fb.h

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/* 
 * fbreg.h - Register and other definitions for Grinnell FB.
 * 
 * Author:  Spencer W. Thomas
 *      Computer Science Dept.
 *      University of Utah
 * Date:    Tue Dec 20 1983
 * Copyright (c) 1983 Spencer W. Thomas
 * 
 * $Header: fbreg.h,v 1.1 84/01/05 15:58:56 thomas Exp $
 * $Log:    fbreg.h,v $
 * Revision 1.1  84/01/05  15:58:56  thomas
 * Initial revision
 * 
 */


#ifndef GRINNELL_H                            /* only once */
#define GRINNELL_H

#ifdef KERNEL
struct fbdevice
{
    short   drwc;           /* DR11 word count */
    u_short drba;           /* DR11 buffer address */
    short   drst;           /* DR11 status register */
    short   drdb;           /* not used */
};


/* various defines */

#define FBPRI       (NZERO + 1) /* sleep priority */
#define FBTOUT      600     /* 10 sec timeout */

/* DR11 control bits */

#define GO               01
#define FNCT1            02
#define INT_ENAB       0100
#define READY          0200
#define ATTN         020000
#define NEX      040000
#define ERROR       0100000

/* Frame buffer status register interpretation string */

#define FBSTAT  "\020\020ERROR\017NEX\016ATTN\010READY\07IE\02F1\01GO"

#define FBADDR(unit)    ((struct fbdevice *)fbinfo[unit]->ui_addr)

/* transmission modes */

#define READ        INT_ENAB | FNCT1 | GO   /* cpu <- fb */
#define WRITE       INT_ENAB | GO   /* cpu -> fb */

#endif KERNEL

/*
    definitions of basic frame buffer instructions
*/

#define WriteImageData      (short)0000000
#define LoadSubchannelMask  (short)0010000
#define WriteGraphicData    (short)0020000
#define Text            (short)0022000
#define LoadWriteMode       (short)0024000
#define Background      (short)0200 /* Reverse Background Bit */
#define Additive        (short)0100 /* Additive Characters/Graphic Data */
#define ZBit            (short)040  /* the "Z-Bit" */
#define VectorMode      (short)020  /* Vector Mode Bit */
#define ModeHeight      (short)010
#define ModeWidth       (short)04
#define CursPos         (short)02   /* if on, position at A+B, else at A */
#define CursOn          (short)01   /* Cursor visible or not */
#define LoadUpdateMode      (short)0026000
#define ElementUpdate       (short)0/* shift for E1E0 bits */
#define LineUpdate      2   /* shift for L1L0 bits */
#define ScrUpdate       4   /* shift for S1S0 bits */
#define A_no_change     (short)0/* Ea or La remains unchanged */
#define A_C         1   /* Ea or La gets Ec or Lc */
#define A_AB            2   /* Ea (La) gets Ea+Eb (La+Lb) */
#define A_AC            3   /* Ea (La) gets Ea+Ec (La+Lc) */
#define NoScroll        (short)0/* no scrolling */
#define ScrollHome      1   /* scroll to home position */
#define ScrollDown      2
#define ScrollUp        3
#define Erase           (short)0030000
#define EraseLine       (short)0032000
#define SpecialLocationUpdate   (short)0034000
#define ExecuteGraphicWrite (short)0036000
#define GoWrite         (short)0002000
#define LoadElement     (short)0040000
#define LoadLine        (short)0060000
#define LoadRelative        (short)0000000
#define LoadARegisters      (short)0004000
#define LoadBRegisters      (short)0010000
#define LoadCregisters      (short)0014000
#define LoadEaRelative      (short)0040000
#define LoadEA          (short)0044000
#define LoadEB          (short)0050000
#define LoadEC          (short)0054000
#define LoadLaRelative      (short)0060000
#define LoadLA          (short)0064000
#define LoadLB          (short)0070000
#define LoadLC          (short)0074000
#define LoadDisplayChannels (short)0100000
#define SelectPeripheralDevice  (short)0120000
#define Digitizer       (short)01
#define VideoControl        (short)020  /* Video Configuration */
#define ColorMap        (short)040  /* Bit 5 */
#define SelectRedMap        (short)0
#define SelectGreenMap      (short)02000
#define SelectBlueMap       (short)04000
#define SelectWriteAll      (short)06000
#define Zoom            (short)0200 /* Zoom and Pan card (Bit 7) */
#define ZoomOn          (short)010  /* Enable Zoom and Pan */
#define ZcursOn         (short)040  /* Zoom cursor visible or not */
#define ZcBlink         (short)020  /* Blink Zoom cursor or not */
#define Zwrap           (short)04   /* Wrap or Clip */
#define Zfactor1        (short)0/* times one */
#define Zfactor2        (short)1/* times two */
#define Zfactor4        (short)2/* times four */
#define Zfactor8        (short)3/* times eight */
#define MemReadback     (short)0400 /* Memory Readback */
#define ByteUnpacker        (short)01000
#define UnpackText      (short)07000    /* Text and bit 9. */
#define UnpackGraphicData   (short)05000    /* Graphic Data and bit 9. */
#define UnpackImageData     (short)03000    /* Image Data and bit 9. */
#define IntTest         (short)04000    /* Internal Tests */
#define LoadPAddress        (short)0130000
#define LoadPRegister       (short)0140000
#define PRegShift       9   /* shift to Peripheral
                       Register Field */
#define LoadPData       (short)0150000
#define ReadbackPData       (short)0160000
#define NoOperation     (short)0170000
#define BUG         1
                    /* bug exists which eats 2nd
                       word of some transfers */
#define ZBUGy           4
                    /* bug exists where Zoom Cursor
                       is 4 pixels above mark. */
#ifndef KERNEL

/* TAG( fd_file )
 * 
 * Display file structure as used by Fdstart, Fddraw, etc.
 */

struct  fd_file {   /* definition of display file structure */
    int fd_len;     /* length used */
    int fd_abs_rel; /* absolute/relative flag */
    int fd_x;       /* final x position */
    int fd_y;       /* final y position */
    short   fd_list[1]; /* actual display file */
};

#endif KERNEL

/* Definition of IOCTL codes */
#define FBGETBOX    _IOW(F,0,struct fb_getbox)

/* Structure used by FBGETBOX ioctl */
struct fb_getbox {
    short xmin, xmax,
      ymin, ymax,
      xfreq, yfreq;
    short *buf;
    int n;
};

#endif GRINNELL_H