vgahw.c

基于组件方式开发操作系统的OSKIT源代码

/*
 * $XFree86: xc/programs/Xserver/hw/xfree86/vga256/vga/vgaHW.c,v 3.50.2.1 1997/05/10 07:03:00 hohndel Exp $
 *
 * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Thomas Roell not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Thomas Roell makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 *
 * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THOMAS ROELL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 * Author:  Thomas Roell, [e-mail]
 */
/* $XConsortium: vgaHW.c /main/19 1996/10/28 04:55:33 kaleb $ */

#ifdef ISC202
#include <sys/types.h>
#define WIFEXITED(a)  ((a & 0x00ff) == 0)  /* LSB will be 0 */
#define WEXITSTATUS(a) ((a & 0xff00) >> 8)
#define WIFSIGNALED(a) ((a & 0xff00) == 0) /* MSB will be 0 */
#define WTERMSIG(a) (a & 0x00ff)
#else
#if defined(ISC) && !defined(_POSIX_SOURCE)
#define _POSIX_SOURCE
#include <sys/types.h>
#include <sys/wait.h>
#undef _POSIX_SOURCE
#else
#if defined(MINIX) || defined(AMOEBA) || (defined(ISC) && defined(_POSIX_SOURCE)) || defined(Lynx) || defined(OSKIT)
#include <sys/types.h>
#endif
#include <sys/wait.h>
#endif
#endif

#if !defined(AMOEBA) && !defined(MINIX)
#define _NEED_SYSI86
#endif

#include "X.h"
#include "misc.h"

#include "compiler.h"

#include "xf86.h"
#include "xf86Priv.h"
#if 0
#include <errno.h>
#else
#include "xf86_OSlib.h"
#endif
#include "xf86_HWlib.h"
#include "vga.h"
#ifdef PC98_EGC
/* I/O port address define for extended EGC */
#define		EGC_READ	0x4a2	/* EGC FGC,EGC,Read Plane  */
#define		EGC_MASK	0x4a8	/* EGC Mask register       */
#define		EGC_ADD		0x4ac	/* EGC Dest/Source address */
#define		EGC_LENGTH	0x4ae	/* EGC Bit length          */
#endif

#if !defined(PC98_NEC480) && !defined(PC98_EGC)
#if !defined(MONOVGA) && !defined(SCO)
#ifndef SAVE_FONT1
#define SAVE_FONT1
#endif
#endif

#if defined(Lynx) || defined(CSRG_BASED) || defined(MACH386) || defined(linux) || defined(AMOEBA) || defined(MINIX) || defined (OSKIT)
#ifndef NEED_SAVED_CMAP
#define NEED_SAVED_CMAP
#endif
#ifndef MONOVGA
#ifndef SAVE_TEXT
#define SAVE_TEXT
#endif
#endif
#ifndef SAVE_FONT2
#define SAVE_FONT2
#endif
#endif

/* bytes per plane to save for text */
#if defined(Lynx) || defined(linux) || defined(MINIX)
#define TEXT_AMOUNT 16384
#else
#define TEXT_AMOUNT 4096
#endif

/* bytes per plane to save for font data */
#define FONT_AMOUNT 8192
#endif /* !defined(PC98_NEC480) && !defined(PC98_EGC) */

#if defined(CSRG_BASED) || defined(MACH386)
#include <sys/time.h>
#endif

#ifdef MACH386
#define WEXITSTATUS(x) (x.w_retcode)
#define WTERMSIG(x) (x.w_termsig)
#define WSTOPSIG(x) (x.w_stopsig)
#endif

/* This the only where the definition seems to work (out of
 * vga.c/vgaHW.c/vgaCmap.c).
 */
Bool clgd6225Lcd= FALSE;

#ifdef MONOVGA
/* DAC indices for white and black */
#define WHITE_VALUE 0x3F
#define BLACK_VALUE 0x00
#define OVERSCAN_VALUE 0x01
#endif

static CARD32
vgaOffMode(
#if NeedFunctionPrototypes
     OsTimerPtr	/* timer */,
     CARD32	/* now */,
     pointer	/* arg */
#endif
);

static CARD32
vgaSuspendMode(
#if NeedFunctionPrototypes
     OsTimerPtr	/* timer */,
     CARD32	/* now */,
     pointer	/* arg */
#endif
);

static Bool
setExternClock(
#if NeedFunctionPrototypes
     int	/* clock */
#endif
);

static int currentGraphicsClock = -1;
static int currentExternClock = -1;

int vgaRamdacMask = 0x3F;

#define new ((vgaHWPtr)vgaNewVideoState)

unsigned VGA_IOPorts[] = {
#ifdef PC98_NEC480
	0x60,  0x62,  0x6a,  0x7c,  0x7e,  0x80,  0xa0,  0xa2,  0x3c0, 0x3c2,
	0x3c4, 0x3c6, 0x3c7, 0x3c8, 0x3c9, 0x3cc, 0x3ce, 0x3d0, 0x9a0, 0x9a8,
#else
#ifdef PC98_EGC
/* I/O port address define Normal & Hireso mode */
	0xa8,  0xaa,  0xac,  0xae,  0x4a0, 0x4a1, 0x4a2, 0x4a3, 0x4a4, 0x4a5,
	0x4a6, 0x4a7, 0x4a8, 0x4a9, 0x4aa, 0x4ab, 0x4ac, 0x4ad, 0x4ae, 0x4af,
#else
	0x3B4, 0x3B5, 0x3BA, 0x3C0, 0x3C1, 0x3C2, 0x3C4, 0x3C5, 0x3C6, 0x3C7, 
	0x3C8, 0x3C9, 0x3CA, 0x3CB, 0x3CC, 0x3CE, 0x3CF, 0x3D4, 0x3D5, 0x3DA,
#endif
#endif
};
int Num_VGA_IOPorts = (sizeof(VGA_IOPorts)/sizeof(VGA_IOPorts[0]));

#ifdef NEED_SAVED_CMAP
/* This default colourmap is used only when it can't be read from the VGA */

unsigned char defaultDAC[768] =
{
     0,  0,  0,    0,  0, 42,    0, 42,  0,    0, 42, 42,
    42,  0,  0,   42,  0, 42,   42, 21,  0,   42, 42, 42,
    21, 21, 21,   21, 21, 63,   21, 63, 21,   21, 63, 63,
    63, 21, 21,   63, 21, 63,   63, 63, 21,   63, 63, 63,
     0,  0,  0,    5,  5,  5,    8,  8,  8,   11, 11, 11,
    14, 14, 14,   17, 17, 17,   20, 20, 20,   24, 24, 24,
    28, 28, 28,   32, 32, 32,   36, 36, 36,   40, 40, 40,
    45, 45, 45,   50, 50, 50,   56, 56, 56,   63, 63, 63,
     0,  0, 63,   16,  0, 63,   31,  0, 63,   47,  0, 63,
    63,  0, 63,   63,  0, 47,   63,  0, 31,   63,  0, 16,
    63,  0,  0,   63, 16,  0,   63, 31,  0,   63, 47,  0,
    63, 63,  0,   47, 63,  0,   31, 63,  0,   16, 63,  0,
     0, 63,  0,    0, 63, 16,    0, 63, 31,    0, 63, 47,
     0, 63, 63,    0, 47, 63,    0, 31, 63,    0, 16, 63,
    31, 31, 63,   39, 31, 63,   47, 31, 63,   55, 31, 63,
    63, 31, 63,   63, 31, 55,   63, 31, 47,   63, 31, 39,
    63, 31, 31,   63, 39, 31,   63, 47, 31,   63, 55, 31,
    63, 63, 31,   55, 63, 31,   47, 63, 31,   39, 63, 31,
    31, 63, 31,   31, 63, 39,   31, 63, 47,   31, 63, 55,
    31, 63, 63,   31, 55, 63,   31, 47, 63,   31, 39, 63,
    45, 45, 63,   49, 45, 63,   54, 45, 63,   58, 45, 63,
    63, 45, 63,   63, 45, 58,   63, 45, 54,   63, 45, 49,
    63, 45, 45,   63, 49, 45,   63, 54, 45,   63, 58, 45,
    63, 63, 45,   58, 63, 45,   54, 63, 45,   49, 63, 45,
    45, 63, 45,   45, 63, 49,   45, 63, 54,   45, 63, 58,
    45, 63, 63,   45, 58, 63,   45, 54, 63,   45, 49, 63,
     0,  0, 28,    7,  0, 28,   14,  0, 28,   21,  0, 28,
    28,  0, 28,   28,  0, 21,   28,  0, 14,   28,  0,  7,
    28,  0,  0,   28,  7,  0,   28, 14,  0,   28, 21,  0,
    28, 28,  0,   21, 28,  0,   14, 28,  0,    7, 28,  0,
     0, 28,  0,    0, 28,  7,    0, 28, 14,    0, 28, 21,
     0, 28, 28,    0, 21, 28,    0, 14, 28,    0,  7, 28,
    14, 14, 28,   17, 14, 28,   21, 14, 28,   24, 14, 28,
    28, 14, 28,   28, 14, 24,   28, 14, 21,   28, 14, 17,
    28, 14, 14,   28, 17, 14,   28, 21, 14,   28, 24, 14,
    28, 28, 14,   24, 28, 14,   21, 28, 14,   17, 28, 14,
    14, 28, 14,   14, 28, 17,   14, 28, 21,   14, 28, 24,
    14, 28, 28,   14, 24, 28,   14, 21, 28,   14, 17, 28,
    20, 20, 28,   22, 20, 28,   24, 20, 28,   26, 20, 28,
    28, 20, 28,   28, 20, 26,   28, 20, 24,   28, 20, 22,
    28, 20, 20,   28, 22, 20,   28, 24, 20,   28, 26, 20,
    28, 28, 20,   26, 28, 20,   24, 28, 20,   22, 28, 20,
    20, 28, 20,   20, 28, 22,   20, 28, 24,   20, 28, 26,
    20, 28, 28,   20, 26, 28,   20, 24, 28,   20, 22, 28,
     0,  0, 16,    4,  0, 16,    8,  0, 16,   12,  0, 16,
    16,  0, 16,   16,  0, 12,   16,  0,  8,   16,  0,  4,
    16,  0,  0,   16,  4,  0,   16,  8,  0,   16, 12,  0,
    16, 16,  0,   12, 16,  0,    8, 16,  0,    4, 16,  0,
     0, 16,  0,    0, 16,  4,    0, 16,  8,    0, 16, 12,
     0, 16, 16,    0, 12, 16,    0,  8, 16,    0,  4, 16,
     8,  8, 16,   10,  8, 16,   12,  8, 16,   14,  8, 16,
    16,  8, 16,   16,  8, 14,   16,  8, 12,   16,  8, 10,
    16,  8,  8,   16, 10,  8,   16, 12,  8,   16, 14,  8,
    16, 16,  8,   14, 16,  8,   12, 16,  8,   10, 16,  8,
     8, 16,  8,    8, 16, 10,    8, 16, 12,    8, 16, 14,
     8, 16, 16,    8, 14, 16,    8, 12, 16,    8, 10, 16,
    11, 11, 16,   12, 11, 16,   13, 11, 16,   15, 11, 16,
    16, 11, 16,   16, 11, 15,   16, 11, 13,   16, 11, 12,
    16, 11, 11,   16, 12, 11,   16, 13, 11,   16, 15, 11,
    16, 16, 11,   15, 16, 11,   13, 16, 11,   12, 16, 11,
    11, 16, 11,   11, 16, 12,   11, 16, 13,   11, 16, 15,
    11, 16, 16,   11, 15, 16,   11, 13, 16,   11, 12, 16,
     0,  0,  0,    0,  0,  0,    0,  0,  0,    0,  0,  0,
     0,  0,  0,    0,  0,  0,    0,  0,  0,    0,  0,  0,
};
#endif /* NEED_SAVED_CMAP */

/*
 * With Intel, the version in common_hw/SlowBcopy.s is used.
 * This avoids port I/O during the copy (which causes problems with
 * some hardware).
 */
#ifdef __alpha__
#define slowbcopy_tobus(src,dst,count) SlowBCopyToBus(src,dst,count)
#define slowbcopy_frombus(src,dst,count) SlowBCopyFromBus(src,dst,count)
#else /* __alpha__ */
#define slowbcopy_tobus(src,dst,count) SlowBcopy(src,dst,count)
#define slowbcopy_frombus(src,dst,count) SlowBcopy(src,dst,count)
#endif /* __alpha__ */

/*
 * vgaProtect --
 *	Protect VGA registers and memory from corruption during loads.
 */
void
vgaProtect(on)
     Bool on;
{
#if !defined(PC98_NEC480) && !defined(PC98_EGC)
  unsigned char tmp;

  if (xf86VTSema) {
    if (on) {
      /*
       * Turn off screen and disable sequencer.
       */
      outb(0x3C4, 0x01);
      tmp = inb(0x3C5);

      (*vgaSaveScreenFunc)(SS_START);		/* start synchronous reset */
      outw(0x3C4, ((tmp | 0x20) << 8) | 0x01);	/* disable the display */

      tmp = inb(vgaIOBase + 0x0A);
      outb(0x3C0, 0x00);			/* enable pallete access */
    }
    else {
      /*
       * Reenable sequencer, then turn on screen.
       */
      outb(0x3C4, 0x01);
      tmp = inb(0x3C5);

      outw(0x3C4, ((tmp & 0xDF) << 8) | 0x01);	/* reenable display */
      (*vgaSaveScreenFunc)(SS_FINISH);		/* clear synchronousreset */

      tmp = inb(vgaIOBase + 0x0A);
      outb(0x3C0, 0x20);			/* disable pallete access */
    }
  }
#endif /* !defined(PC98_NEC480) && !defined(PC98_EGC) */
}

/*
 * vgaSaveScreen -- blank the screen.
 */

Bool
vgaSaveScreen(pScreen, on)
     ScreenPtr pScreen;
     Bool  on;
{
#if !defined(PC98_EGC) && !defined(PC98_NEC480)
   unsigned char scrn;

#ifndef OSKIT 
   if (on)
      SetTimeSinceLastInputEvent();
#endif /* !OSKIT */

   if (xf86VTSema) {
      /* the server is running on the current vt */
      /* so just go for it */

      outb(0x3C4,1);
      scrn = inb(0x3C5);

      if (on) {
	 scrn &= 0xDF;			/* enable screen */
      } else {
	 scrn |= 0x20;			/* blank screen */
      }

      (*vgaSaveScreenFunc)(SS_START);
      outw(0x3C4, (scrn << 8) | 0x01); /* change mode */
      (*vgaSaveScreenFunc)(SS_FINISH);
   }
#else /* PC98_EGC || PC98_NEC480 */
  if (on)
    SetTimeSinceLastInputEvent();
  
  if (xf86VTSema) 
    {
      if (on) 
	outb(0xa2, 0xd);
      else
	outb(0xa2, 0xc);
    }
#endif /* PC98_EGC || PC98_NEC480 */
   return (TRUE);
}

/*
 * vgaDPMSSet -- Sets VESA Display Power Management Signaling (DPMS) Mode
 *
 * This generic VGA function can only set the Off and On modes.  If the
 * Standby and Suspend modes are to be supported, a chip specific replacement
 * for this function must be written.
 */

void
vgaDPMSSet(PowerManagementMode)
    int PowerManagementMode;
{
#ifdef DPMSExtension
  unsigned char seq1, crtc17;
  if (!xf86VTSema) return;
  switch (PowerManagementMode)
  {
  case DPMSModeOn:
    /* Screen: On; HSync: On, VSync: On */
    seq1 = 0x00;
    crtc17 = 0x80;
    break;
  case DPMSModeStandby:
    /* Screen: Off; HSync: Off, VSync: On -- Not Supported */
    seq1 = 0x20;
    crtc17 = 0x80;
    break;
  case DPMSModeSuspend:
    /* Screen: Off; HSync: On, VSync: Off -- Not Supported */
    seq1 = 0x20;
    crtc17 = 0x80;
    break;
  case DPMSModeOff:
    /* Screen: Off; HSync: Off, VSync: Off */
    seq1 = 0x20;
    crtc17 = 0x00;
    break;
  }
  outw(0x3C4, 0x0100);	/* Synchronous Reset */
  outb(0x3C4, 0x01);	/* Select SEQ1 */
  seq1 |= inb(0x3C5) & ~0x20;
  outb(0x3C5, seq1);
  outb(vgaIOBase+4, 0x17); /* Select CRTC17 */