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/* $NetBSD: vidc.c,v 1.2 1996/03/18 19:33:07 mark Exp $ */
/*
* Copyright (c) 1994-1995 Melvyn Tang-Richardson
* Copyright (c) 1994-1995 RiscBSD kernel team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the RiscBSD kernel team
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE RISCBSD TEAM ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* RiscBSD kernel project
*
* vidc.c
*
* Old console ioctl declarations
*
* Created : 17/09/94
*/
#include <sys/types.h>
#include <machine/vidc.h>
#include <machine/katelib.h>
/* VIDC STUFF */
/*
* A structure containing ALL the information required to restore
* the VIDC20 to any given state. ALL vidc transactions should
* go through these procedures, which record the vidc's state.
* it may be an idea to set the permissions of the vidc base address
* so we get a fault, so the fault routine can record the state but
* I guess that's not really necessary for the time being, since we
* can make the kernel more secure later on. Also, it is possible
* to write a routine to allow 'reading' of the vidc registers.
*/
struct vidc_state vidc_lookup = {
{ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0
},
VIDC_PALREG,
VIDC_BCOL,
VIDC_CP1 ,
VIDC_CP2,
VIDC_CP3,
VIDC_HCR,
VIDC_HSWR,
VIDC_HBSR,
VIDC_HDSR,
VIDC_HDER,
VIDC_HBER,
VIDC_HCSR,
VIDC_HIR,
VIDC_VCR,
VIDC_VSWR,
VIDC_VBSR,
VIDC_VDSR,
VIDC_VDER,
VIDC_VBER,
VIDC_VCSR,
VIDC_VCER,
VIDC_EREG,
VIDC_FSYNREG,
VIDC_CONREG,
VIDC_DCTL
};
struct vidc_state vidc_current[1];
int
vidc_write(reg, value)
u_int reg;
int value;
{
int counter;
int *current;
int *tab;
tab = (int *)&vidc_lookup;
current = (int *)vidc_current;
/* End higly doddgy code */
/*
WriteWord ( VIDC_BASE, reg | value );
return 1;
*/
/*
* OK, the VIDC_PALETTE register is handled differently
* to the others on the VIDC, so take that into account here
*/
if (reg==VIDC_PALREG) {
vidc_current->palreg = 0;
WriteWord ( VIDC_BASE, reg | value );
return 0;
}
if (reg==VIDC_PALETTE) {
WriteWord ( VIDC_BASE, reg | value );
vidc_current->palette[vidc_current->palreg] = value;
vidc_current->palreg++;
vidc_current->palreg = vidc_current->palreg & 0xff;
return 0;
}
/*
* Undefine SAFER if you wish to speed things up (a little)
* although this means the function will assume things abou
* the structure of vidc_state. i.e. the first 256 words are
* the palette array
*/
#define SAFER
#ifdef SAFER
#define INITVALUE 0
#else
#define INITVALUE 256
#endif
for ( counter=INITVALUE; counter<= sizeof(struct vidc_state); counter++ ) {
if ( reg==tab[counter] ) {
WriteWord ( VIDC_BASE, reg | value );
current[counter] = value;
return 0;
}
}
return -1;
}
void
vidc_setpalette(vidc)
struct vidc_state *vidc;
{
int counter = 0;
vidc_write(VIDC_PALREG, 0x00000000);
for (counter = 0; counter < 255; counter++)
vidc_write(VIDC_PALETTE, vidc->palette[counter]);
}
void
vidc_setstate(vidc)
struct vidc_state *vidc;
{
vidc_write ( VIDC_PALREG, vidc->palreg );
vidc_write ( VIDC_BCOL, vidc->bcol );
vidc_write ( VIDC_CP1, vidc->cp1 );
vidc_write ( VIDC_CP2, vidc->cp2 );
vidc_write ( VIDC_CP3, vidc->cp3 );
vidc_write ( VIDC_HCR, vidc->hcr );
vidc_write ( VIDC_HSWR, vidc->hswr );
vidc_write ( VIDC_HBSR, vidc->hbsr );
vidc_write ( VIDC_HDSR, vidc->hdsr );
vidc_write ( VIDC_HDER, vidc->hder );
vidc_write ( VIDC_HBER, vidc->hber );
vidc_write ( VIDC_HCSR, vidc->hcsr );
vidc_write ( VIDC_HIR, vidc->hir );
vidc_write ( VIDC_VCR, vidc->vcr );
vidc_write ( VIDC_VSWR, vidc->vswr );
vidc_write ( VIDC_VBSR, vidc->vbsr );
vidc_write ( VIDC_VDSR, vidc->vdsr );
vidc_write ( VIDC_VDER, vidc->vder );
vidc_write ( VIDC_VBER, vidc->vber );
vidc_write ( VIDC_VCSR, vidc->vcsr );
vidc_write ( VIDC_VCER, vidc->vcer );
/*
* Right, dunno what to set these to yet, but let's keep RiscOS's
* ones for now, until the time is right to finish this code
*/
/* vidc_write ( VIDC_EREG, vidc->ereg ); */
/* vidc_write ( VIDC_FSYNREG, vidc->fsynreg ); */
/* vidc_write ( VIDC_CONREG, vidc->conreg ); */
/* vidc_write ( VIDC_DCTL, vidc->dctl ); */
}
void
vidc_getstate(vidc)
struct vidc_state *vidc;
{
*vidc = *vidc_current;
}
void
vidc_stdpalette()
{
WriteWord(VIDC_BASE, VIDC_PALREG | 0x00000000);
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL( 0, 0, 0));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 0, 0));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL( 0, 255, 0));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 255, 0));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL( 0, 0, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 0, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL( 0, 255, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 255, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(128, 128, 128));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 128, 128));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(128, 255, 128));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 255, 128));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(128, 128, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 128, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(128, 255, 255));
WriteWord(VIDC_BASE, VIDC_PALETTE | VIDC_COL(255, 255, 255));
}
#if 0
int
vidc_col(red, green, blue)
int red;
int green;
int blue;
{
red = red & 0xFF;
green = green & 0xFF;
blue = blue & 0xFF;
return ( (blue<<16) + (green<<8) + red );
}
#endif
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