path: root/hw/xfree86/ramdac/IBM.c

/*
 * Copyright 1998 by Alan Hourihane, Wigan, England.
 *
 * 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 Alan Hourihane not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Alan Hourihane makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 *
 * ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL ALAN HOURIHANE 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.
 *
 * Authors:  Alan Hourihane, <alanh@fairlite.demon.co.uk>
 *
 * IBM RAMDAC routines.
 */
/* $XFree86: xc/programs/Xserver/hw/xfree86/ramdac/IBM.c,v 1.12 2003/02/17 16:08:29 dawes Exp $ */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86_ansic.h"

#include "xf86Cursor.h"

#define INIT_IBM_RAMDAC_INFO
#include "IBMPriv.h"
#include "xf86RamDacPriv.h"

#define INITIALFREQERR 100000

unsigned long
IBMramdac640CalculateMNPCForClock(
    unsigned long RefClock,	/* In 100Hz units */
    unsigned long ReqClock,	/* In 100Hz units */
    char IsPixClock,	/* boolean, is this the pixel or the sys clock */
    unsigned long MinClock,	/* Min VCO rating */
    unsigned long MaxClock,	/* Max VCO rating */
    unsigned long *rM,	/* M Out */
    unsigned long *rN,	/* N Out */
    unsigned long *rP,	/* Min P In, P Out */
    unsigned long *rC	/* C Out */
)
{
  unsigned long   M, N, P, iP = *rP;
  unsigned long   IntRef, VCO, Clock;
  long            freqErr, lowestFreqErr = INITIALFREQERR;
  unsigned long   ActualClock = 0;

  for (N = 0; N <= 63; N++)
    {
      IntRef = RefClock / (N + 1);
      if (IntRef < 10000)
	break;			/* IntRef needs to be >= 1MHz */
      for (M = 2; M <= 127; M++)
	{
	  VCO = IntRef * (M + 1);
	  if ((VCO < MinClock) || (VCO > MaxClock))
	    continue;
	  for (P = iP; P <= 4; P++)
	    {
	      if (P != 0)
		Clock = (RefClock * (M + 1)) / ((N + 1) * 2 * P);
	      else
		Clock = (RefClock * (M + 1)) / (N + 1);

	      freqErr = (Clock - ReqClock);

	      if (freqErr < 0)
		{
		  /* PixelClock gets rounded up always so monitor reports
		     correct frequency. */
		  if (IsPixClock)
		    continue;
		  freqErr = -freqErr;
		}

	      if (freqErr < lowestFreqErr)
		{
		  *rM = M;
		  *rN = N;
		  *rP = P;
		  *rC = (VCO <= 1280000 ? 1 : 2);
		  ActualClock = Clock;

		  lowestFreqErr = freqErr;
		  /* Return if we found an exact match */
		  if (freqErr == 0)
		    return (ActualClock);
		}
	    }
	}
    }

  return (ActualClock);
}

unsigned long
IBMramdac526CalculateMNPCForClock(
    unsigned long RefClock,	/* In 100Hz units */
    unsigned long ReqClock,	/* In 100Hz units */
    char IsPixClock,	/* boolean, is this the pixel or the sys clock */
    unsigned long MinClock,	/* Min VCO rating */
    unsigned long MaxClock,	/* Max VCO rating */
    unsigned long *rM,	/* M Out */
    unsigned long *rN,	/* N Out */
    unsigned long *rP,	/* Min P In, P Out */
    unsigned long *rC	/* C Out */
)
{
  unsigned long   M, N, P, iP = *rP;
  unsigned long   IntRef, VCO, Clock;
  long            freqErr, lowestFreqErr = INITIALFREQERR;
  unsigned long   ActualClock = 0;

  for (N = 0; N <= 63; N++)
    {
      IntRef = RefClock / (N + 1);
      if (IntRef < 10000)
	break;			/* IntRef needs to be >= 1MHz */
      for (M = 0; M <= 63; M++)
	{
	  VCO = IntRef * (M + 1);
	  if ((VCO < MinClock) || (VCO > MaxClock))
	    continue;
	  for (P = iP; P <= 4; P++)
	    {
	      if (P)
		Clock = (RefClock * (M + 1)) / ((N + 1) * 2 * P);
	      else
		Clock = VCO;

	      freqErr = (Clock - ReqClock);

	      if (freqErr < 0)
		{
		  /* PixelClock gets rounded up always so monitor reports
		     correct frequency. */
		  if (IsPixClock)
		    continue;
		  freqErr = -freqErr;
		}

	      if (freqErr < lowestFreqErr)
		{
		  *rM = M;
		  *rN = N;
		  *rP = P;
		  *rC = (VCO <= 1280000 ? 1 : 2);
		  ActualClock = Clock;

		  lowestFreqErr = freqErr;
		  /* Return if we found an exact match */
		  if (freqErr == 0)
		    return (ActualClock);
		}
	    }
	}
    }

  return (ActualClock);
}

void
IBMramdacRestore(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPtr,
				    RamDacRegRecPtr ramdacReg)
{
	int i, maxreg, dacreg;

	switch (ramdacPtr->RamDacType) {
	    case IBM640_RAMDAC:
		maxreg = 0x300;
		dacreg = 1024;
		break;
	    default:
		maxreg = 0x100;
		dacreg = 768;
		break;
	}

	/* Here we pass a short, so that we can evaluate a mask too */
	/* So that the mask is the high byte and the data the low byte */
	for (i=0;i<maxreg;i++) 
	    (*ramdacPtr->WriteDAC)
	        (pScrn, i, (ramdacReg->DacRegs[i] & 0xFF00) >> 8, 
						ramdacReg->DacRegs[i]);

	(*ramdacPtr->WriteAddress)(pScrn, 0);
	for (i=0;i<dacreg;i++)
	    	(*ramdacPtr->WriteData)(pScrn, ramdacReg->DAC[i]);
}

void
IBMramdacSave(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPtr, 
				 RamDacRegRecPtr ramdacReg)
{
	int i, maxreg, dacreg;

	switch (ramdacPtr->RamDacType) {
	    case IBM640_RAMDAC:
		maxreg = 0x300;
		dacreg = 1024;
		break;
	    default:
		maxreg = 0x100;
		dacreg = 768;
		break;
	}
	
	(*ramdacPtr->ReadAddress)(pScrn, 0);
	for (i=0;i<dacreg;i++)
	    ramdacReg->DAC[i] = (*ramdacPtr->ReadData)(pScrn);

	for (i=0;i<maxreg;i++) 
	    ramdacReg->DacRegs[i] = (*ramdacPtr->ReadDAC)(pScrn, i);
}

RamDacHelperRecPtr
IBMramdacProbe(ScrnInfoPtr pScrn, RamDacSupportedInfoRecPtr ramdacs/* , RamDacRecPtr ramdacPtr*/)
{
    RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);
    RamDacHelperRecPtr ramdacHelperPtr = NULL;
    Bool RamDacIsSupported = FALSE;
    int IBMramdac_ID = -1;
    int i;
    unsigned char id, rev, id2, rev2;

    /* read ID and revision */
    rev = (*ramdacPtr->ReadDAC)(pScrn, IBMRGB_rev);
    id = (*ramdacPtr->ReadDAC)(pScrn, IBMRGB_id);

    /* check if ID and revision are read only */
    (*ramdacPtr->WriteDAC)(pScrn, ~rev, 0, IBMRGB_rev);
    (*ramdacPtr->WriteDAC)(pScrn, ~id, 0, IBMRGB_id);
    rev2 = (*ramdacPtr->ReadDAC)(pScrn, IBMRGB_rev);
    id2 = (*ramdacPtr->ReadDAC)(pScrn, IBMRGB_id);

    switch (id) {
	case 0x30:
		if (rev == 0xc0) IBMramdac_ID = IBM624_RAMDAC;
		if (rev == 0x80) IBMramdac_ID = IBM624DB_RAMDAC;
		break;
	case 0x12:
		if (rev == 0x1c) IBMramdac_ID = IBM640_RAMDAC;
		break;
	case 0x01:
		IBMramdac_ID = IBM525_RAMDAC;
		break;
	case 0x02:
		if (rev == 0xf0) IBMramdac_ID = IBM524_RAMDAC;
		if (rev == 0xe0) IBMramdac_ID = IBM524A_RAMDAC;
		if (rev == 0xc0) IBMramdac_ID = IBM526_RAMDAC;
		if (rev == 0x80) IBMramdac_ID = IBM526DB_RAMDAC;
		break;
    }

    if (id == 1 || id == 2) {
        if (id == id2 && rev == rev2) {		/* IBM RGB52x found */
	    /* check for 128bit VRAM -> RGB528 */
	    if (((*ramdacPtr->ReadDAC)(pScrn, IBMRGB_misc1) & 0x03) == 0x03) {
	        IBMramdac_ID = IBM528_RAMDAC;	/* 128bit DAC found */
	        if (rev == 0xe0)
		    IBMramdac_ID = IBM528A_RAMDAC;
	    }
        }
    }

    (*ramdacPtr->WriteDAC)(pScrn, rev, 0, IBMRGB_rev);
    (*ramdacPtr->WriteDAC)(pScrn, id, 0, IBMRGB_id);

    if (IBMramdac_ID == -1) {
        xf86DrvMsg(pScrn->scrnIndex, X_PROBED, 
		"Cannot determine IBM RAMDAC type, aborting\n");
	return NULL;
    } else {
        xf86DrvMsg(pScrn->scrnIndex, X_PROBED, 
		"Attached RAMDAC is %s\n", IBMramdacDeviceInfo[IBMramdac_ID&0xFFFF].DeviceName);
    }

    for (i=0;ramdacs[i].token != -1;i++) {
	if (ramdacs[i].token == IBMramdac_ID)
	    RamDacIsSupported = TRUE;
    }

    if (!RamDacIsSupported) {
        xf86DrvMsg(pScrn->scrnIndex, X_PROBED, 
		"This IBM RAMDAC is NOT supported by this driver, aborting\n");
	return NULL;
    }

    ramdacHelperPtr = RamDacHelperCreateInfoRec();
    switch (IBMramdac_ID) {
	case IBM526_RAMDAC:
	case IBM526DB_RAMDAC:
 	    ramdacHelperPtr->SetBpp = IBMramdac526SetBpp;
    	    ramdacHelperPtr->HWCursorInit = IBMramdac526HWCursorInit;
	    break;
	case IBM640_RAMDAC:
 	    ramdacHelperPtr->SetBpp = IBMramdac640SetBpp;
    	    ramdacHelperPtr->HWCursorInit = IBMramdac640HWCursorInit;
	    break;
    }
    ramdacPtr->RamDacType = IBMramdac_ID;
    ramdacHelperPtr->RamDacType = IBMramdac_ID;
    ramdacHelperPtr->Save = IBMramdacSave;
    ramdacHelperPtr->Restore = IBMramdacRestore;

    return ramdacHelperPtr;
}

void
IBMramdac526SetBpp(ScrnInfoPtr pScrn, RamDacRegRecPtr ramdacReg)
{
    ramdacReg->DacRegs[IBMRGB_key_control] = 0x00; /* Disable Chroma Key */

    switch (pScrn->bitsPerPixel) {
	case 32:
	    ramdacReg->DacRegs[IBMRGB_pix_fmt] = PIXEL_FORMAT_32BPP;
	    ramdacReg->DacRegs[IBMRGB_32bpp] = B32_DCOL_DIRECT;
	    ramdacReg->DacRegs[IBMRGB_24bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_16bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_8bpp] = 0;
	    if (pScrn->overlayFlags & OVERLAY_8_32_PLANAR) {
		ramdacReg->DacRegs[IBMRGB_key_control] = 0x01; /* Enable Key */
		ramdacReg->DacRegs[IBMRGB_key] = 0xFF; 
		ramdacReg->DacRegs[IBMRGB_key_mask] = 0xFF;
	    }
	    break;
	case 24:
	    ramdacReg->DacRegs[IBMRGB_pix_fmt] = PIXEL_FORMAT_24BPP;
	    ramdacReg->DacRegs[IBMRGB_32bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_24bpp] = B24_DCOL_DIRECT;
	    ramdacReg->DacRegs[IBMRGB_16bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_8bpp] = 0;
	    break;
	case 16:
	    if (pScrn->depth == 16) {
	        ramdacReg->DacRegs[IBMRGB_pix_fmt] = PIXEL_FORMAT_16BPP;
	        ramdacReg->DacRegs[IBMRGB_32bpp] = 0;
	        ramdacReg->DacRegs[IBMRGB_24bpp] = 0;
	        ramdacReg->DacRegs[IBMRGB_16bpp] = B16_DCOL_DIRECT|B16_LINEAR |
					           B16_CONTIGUOUS | B16_565;
	        ramdacReg->DacRegs[IBMRGB_8bpp] = 0;
	    } else {
	        ramdacReg->DacRegs[IBMRGB_pix_fmt] = PIXEL_FORMAT_16BPP;
	        ramdacReg->DacRegs[IBMRGB_32bpp] = 0;
	        ramdacReg->DacRegs[IBMRGB_24bpp] = 0;
	        ramdacReg->DacRegs[IBMRGB_16bpp] = B16_DCOL_DIRECT|B16_LINEAR |
					           B16_CONTIGUOUS | B16_555;
	        ramdacReg->DacRegs[IBMRGB_8bpp] = 0;
	    }
	    break;
	case 8:
	    ramdacReg->DacRegs[IBMRGB_pix_fmt] = PIXEL_FORMAT_8BPP;
	    ramdacReg->DacRegs[IBMRGB_32bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_24bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_16bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_8bpp] = B8_DCOL_INDIRECT;
	    break;
	case 4:
	    ramdacReg->DacRegs[IBMRGB_pix_fmt] = PIXEL_FORMAT_4BPP;
	    ramdacReg->DacRegs[IBMRGB_32bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_24bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_16bpp] = 0;
	    ramdacReg->DacRegs[IBMRGB_8bpp] = 0;
    }
}

IBMramdac526SetBppProc *IBMramdac526SetBppWeak(void) {
    return IBMramdac526SetBpp;
}

void
IBMramdac640SetBpp(ScrnInfoPtr pScrn, RamDacRegRecPtr ramdacReg)
{
    unsigned char bpp = 0x00;
    unsigned char overlaybpp = 0x00;
    unsigned char offset = 0x00;
    unsigned char dispcont = 0x44;

    ramdacReg->DacRegs[RGB640_SER_WID_03_00] = 0x00;
    ramdacReg->DacRegs[RGB640_SER_WID_07_04] = 0x00;
    ramdacReg->DacRegs[RGB640_DIAGS] = 0x07;

    switch (pScrn->depth) {
	case 8:
	    ramdacReg->DacRegs[RGB640_SER_07_00] = 0x00; 
	    ramdacReg->DacRegs[RGB640_SER_15_08] = 0x00;
	    ramdacReg->DacRegs[RGB640_SER_23_16] = 0x00;
	    ramdacReg->DacRegs[RGB640_SER_31_24] = 0x00;
    	    ramdacReg->DacRegs[RGB640_SER_MODE] = IBM640_SER_16_1; /*16:1 Mux*/
    	    ramdacReg->DacRegs[RGB640_MISC_CONF] = IBM640_PCLK_8; /* pll / 8 */
	    bpp = 0x03;
	    break;
	case 15:
	    ramdacReg->DacRegs[RGB640_SER_07_00] = 0x10;
	    ramdacReg->DacRegs[RGB640_SER_15_08] = 0x11;
	    ramdacReg->DacRegs[RGB640_SER_23_16] = 0x00;
	    ramdacReg->DacRegs[RGB640_SER_31_24] = 0x00;
    	    ramdacReg->DacRegs[RGB640_SER_MODE] = IBM640_SER_8_1; /* 8:1 Mux*/
    	    ramdacReg->DacRegs[RGB640_MISC_CONF] = IBM640_PCLK_8; /* pll / 8 */
	    bpp = 0x0E;
	    break;
	case 16:
	    ramdacReg->DacRegs[RGB640_SER_07_00] = 0x10;
	    ramdacReg->DacRegs[RGB640_SER_15_08] = 0x11;
	    ramdacReg->DacRegs[RGB640_SER_23_16] = 0x00;
	    ramdacReg->DacRegs[RGB640_SER_31_24] = 0x00;
    	    ramdacReg->DacRegs[RGB640_SER_MODE] = IBM640_SER_8_1; /* 8:1 Mux*/
    	    ramdacReg->DacRegs[RGB640_MISC_CONF] = IBM640_PCLK_8; /* pll / 8 */
	    bpp = 0x05;
	    break;
	case 24:
	    ramdacReg->DacRegs[RGB640_SER_07_00] = 0x30; 
	    ramdacReg->DacRegs[RGB640_SER_15_08] = 0x31;
	    ramdacReg->DacRegs[RGB640_SER_23_16] = 0x32;
	    ramdacReg->DacRegs[RGB640_SER_31_24] = 0x33;
    	    ramdacReg->DacRegs[RGB640_SER_MODE] = IBM640_SER_4_1; /* 4:1 Mux*/
    	    ramdacReg->DacRegs[RGB640_MISC_CONF] = IBM640_PCLK_8; /* pll / 8 */
	    bpp = 0x09;
	    if (pScrn->overlayFlags & OVERLAY_8_32_PLANAR) {
		ramdacReg->DacRegs[RGB640_SER_WID_07_04] = 0x04;
		ramdacReg->DacRegs[RGB640_CHROMA_KEY0] = 0xFF;
		ramdacReg->DacRegs[RGB640_CHROMA_MASK0] = 0xFF;
		offset = 0x04;
		overlaybpp = 0x04;
		dispcont = 0x48;
	    }
	    break;
	case 30: /* 10 bit dac */
	    ramdacReg->DacRegs[RGB640_SER_07_00] = 0x30; 
	    ramdacReg->DacRegs[RGB640_SER_15_08] = 0x31;
	    ramdacReg->DacRegs[RGB640_SER_23_16] = 0x32;
	    ramdacReg->DacRegs[RGB640_SER_31_24] = 0x33;
    	    ramdacReg->DacRegs[RGB640_SER_MODE] = IBM640_SER_4_1; /* 4:1 Mux*/
    	    ramdacReg->DacRegs[RGB640_MISC_CONF] = IBM640_PSIZE10 | 
						   IBM640_PCLK_8; /* pll / 8 */
	    bpp = 0x0D;
	    break;
    }
	
    { 
	int i;
    	for (i=0x100;i<0x140;i+=4) {
	    /* Initialize FrameBuffer Window Attribute Table */
	    ramdacReg->DacRegs[i+0] = bpp;
	    ramdacReg->DacRegs[i+1] = offset;
	    ramdacReg->DacRegs[i+2] = 0x00;
	    ramdacReg->DacRegs[i+3] = 0x00;
	    /* Initialize Overlay Window Attribute Table */
	    ramdacReg->DacRegs[i+0x100] = overlaybpp;
	    ramdacReg->DacRegs[i+0x101] = 0x00;
	    ramdacReg->DacRegs[i+0x102] = 0x00;
	    ramdacReg->DacRegs[i+0x103] = dispcont;
        }
    }
}

static void 
IBMramdac526ShowCursor(ScrnInfoPtr pScrn)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   /* Enable cursor - X11 mode */
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs, 0x00, 0x07);
}

static void 
IBMramdac640ShowCursor(ScrnInfoPtr pScrn)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   /* Enable cursor - mode2 (x11 mode) */
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURSOR_CONTROL, 0x00, 0x0B);
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CROSSHAIR_CONTROL, 0x00, 0x00);
}

static void
IBMramdac526HideCursor(ScrnInfoPtr pScrn)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   /* Disable cursor - X11 mode */
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs, 0x00, 0x24);
}

static void
IBMramdac640HideCursor(ScrnInfoPtr pScrn)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   /* Disable cursor - mode2 (x11 mode) */
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURSOR_CONTROL, 0x00, 0x08);
}

static void
IBMramdac526SetCursorPosition(ScrnInfoPtr pScrn, int x, int y)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   x += 64;
   y += 64;

   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_hot_x, 0x00, 0x3f);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_hot_y, 0x00, 0x3f);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_xl, 0x00, x & 0xff);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_xh, 0x00, (x>>8) & 0xf);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_yl, 0x00, y & 0xff);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_yh, 0x00, (y>>8) & 0xf);
}

static void
IBMramdac640SetCursorPosition(ScrnInfoPtr pScrn, int x, int y)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   x += 64;
   y += 64;

   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_OFFSETX, 0x00, 0x3f);
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_OFFSETY, 0x00, 0x3f);
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_X_LOW, 0x00, x & 0xff);
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_X_HIGH, 0x00, (x>>8) & 0xf);
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_Y_LOW, 0x00, y & 0xff);
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_Y_HIGH, 0x00, (y>>8) & 0xf);
}

static void
IBMramdac526SetCursorColors(ScrnInfoPtr pScrn, int bg, int fg)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);

   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_col1_r, 0x00, bg >> 16);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_col1_g, 0x00, bg >> 8);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_col1_b, 0x00, bg);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_col2_r, 0x00, fg >> 16);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_col2_g, 0x00, fg >> 8);
   (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_col2_b, 0x00, fg);
}

static void
IBMramdac640SetCursorColors(ScrnInfoPtr pScrn, int bg, int fg)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);
  
   (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_COL0, 0x00, 0);
   (*ramdacPtr->WriteData)(pScrn, fg>>16);
   (*ramdacPtr->WriteData)(pScrn, fg>>8);
   (*ramdacPtr->WriteData)(pScrn, fg);
   (*ramdacPtr->WriteData)(pScrn, bg>>16);
   (*ramdacPtr->WriteData)(pScrn, bg>>8);
   (*ramdacPtr->WriteData)(pScrn, bg);
   (*ramdacPtr->WriteData)(pScrn, fg>>16);
   (*ramdacPtr->WriteData)(pScrn, fg>>8);
   (*ramdacPtr->WriteData)(pScrn, fg);
   (*ramdacPtr->WriteData)(pScrn, bg>>16);
   (*ramdacPtr->WriteData)(pScrn, bg>>8);
   (*ramdacPtr->WriteData)(pScrn, bg);
}

static void 
IBMramdac526LoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);
   int i;
   /* 
    * Output the cursor data.  The realize function has put the planes into
    * their correct order, so we can just blast this out.
    */
   for (i = 0; i < 1024; i++)
      (*ramdacPtr->WriteDAC)(pScrn, IBMRGB_curs_array + i, 0x00, (*src++));
}

static void 
IBMramdac640LoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src)
{
   RamDacRecPtr ramdacPtr = RAMDACSCRPTR(pScrn);
   int i;
   /* 
    * Output the cursor data.  The realize function has put the planes into
    * their correct order, so we can just blast this out.
    */
   for (i = 0; i < 1024; i++)
      (*ramdacPtr->WriteDAC)(pScrn, RGB640_CURS_WRITE + i, 0x00, (*src++));
}

static Bool 
IBMramdac526UseHWCursor(ScreenPtr pScr, CursorPtr pCurs)
{
    return TRUE;
}

static Bool 
IBMramdac640UseHWCursor(ScreenPtr pScr, CursorPtr pCurs)
{
    return TRUE;
}

void
IBMramdac526HWCursorInit(xf86CursorInfoPtr infoPtr)
{
    infoPtr->MaxWidth = 64;
    infoPtr->MaxHeight = 64;
    infoPtr->Flags = HARDWARE_CURSOR_TRUECOLOR_AT_8BPP |
		     HARDWARE_CURSOR_AND_SOURCE_WITH_MASK |
		     HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_1;
    infoPtr->SetCursorColors = IBMramdac526SetCursorColors;
    infoPtr->SetCursorPosition = IBMramdac526SetCursorPosition;
    infoPtr->LoadCursorImage = IBMramdac526LoadCursorImage;
    infoPtr->HideCursor = IBMramdac526HideCursor;
    infoPtr->ShowCursor = IBMramdac526ShowCursor;
    infoPtr->UseHWCursor = IBMramdac526UseHWCursor;
}

void
IBMramdac640HWCursorInit(xf86CursorInfoPtr infoPtr)
{
    infoPtr->MaxWidth = 64;
    infoPtr->MaxHeight = 64;
    infoPtr->Flags = HARDWARE_CURSOR_TRUECOLOR_AT_8BPP |
		     HARDWARE_CURSOR_AND_SOURCE_WITH_MASK |
		     HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_1;
    infoPtr->SetCursorColors = IBMramdac640SetCursorColors;
    infoPtr->SetCursorPosition = IBMramdac640SetCursorPosition;
    infoPtr->LoadCursorImage = IBMramdac640LoadCursorImage;
    infoPtr->HideCursor = IBMramdac640HideCursor;
    infoPtr->ShowCursor = IBMramdac640ShowCursor;
    infoPtr->UseHWCursor = IBMramdac640UseHWCursor;
}