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NetBSD/sys/arch/amiga/dev/grf_et.c

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/* $NetBSD: grf_et.c,v 1.21 2003/04/18 09:23:17 is Exp $ */
/*
* Copyright (c) 1997 Klaus Burkert
* Copyright (c) 1996 Tobias Abt
* Copyright (c) 1995 Ezra Story
* Copyright (c) 1995 Kari Mettinen
* Copyright (c) 1994 Markus Wild
* Copyright (c) 1994 Lutz Vieweg
* 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 Lutz Vieweg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include "opt_amigacons.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: grf_et.c,v 1.21 2003/04/18 09:23:17 is Exp $");
#include "grfet.h"
#if NGRFET > 0
/*
* Graphics routines for Tseng ET4000 (&W32) boards,
*
* This code offers low-level routines to access Tseng ET4000
* graphics-boards from within NetBSD for the Amiga.
* No warranties for any kind of function at all - this
* code may crash your hardware and scratch your harddisk. Use at your
* own risk. Freely distributable.
*
* Modified for Tseng ET4000 from
* Kari Mettinen's Cirrus driver by Tobias Abt
*
* Fixed Merlin in Z-III, fixed LACE and DBLSCAN, added Domino16M proto
* and AT&T ATT20c491 DAC, added memory-size detection by Klaus Burkert.
*
*
* TODO:
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/cpu.h>
#include <dev/cons.h>
#ifdef TSENGCONSOLE
#include <amiga/dev/itevar.h>
#endif
#include <amiga/amiga/device.h>
#include <amiga/dev/grfioctl.h>
#include <amiga/dev/grfvar.h>
#include <amiga/dev/grf_etreg.h>
#include <amiga/dev/zbusvar.h>
int et_mondefok(struct grfvideo_mode *gv);
void et_boardinit(struct grf_softc *gp);
static void et_CompFQ(u_int fq, u_char *num, u_char *denom);
int et_getvmode(struct grf_softc *gp, struct grfvideo_mode *vm);
int et_setvmode(struct grf_softc *gp, unsigned int mode);
int et_toggle(struct grf_softc *gp, unsigned short);
int et_getcmap(struct grf_softc *gfp, struct grf_colormap *cmap);
int et_putcmap(struct grf_softc *gfp, struct grf_colormap *cmap);
#ifndef TSENGCONSOLE
void et_off(struct grf_softc *gp);
#endif
void et_inittextmode(struct grf_softc *gp);
int et_ioctl(register struct grf_softc *gp, u_long cmd, void *data);
int et_getmousepos(struct grf_softc *gp, struct grf_position *data);
void et_writesprpos(volatile char *ba, short x, short y);
int et_setmousepos(struct grf_softc *gp, struct grf_position *data);
static int et_setspriteinfo(struct grf_softc *gp, struct grf_spriteinfo *data);
int et_getspriteinfo(struct grf_softc *gp, struct grf_spriteinfo *data);
static int et_getspritemax(struct grf_softc *gp, struct grf_position *data);
int et_setmonitor(struct grf_softc *gp, struct grfvideo_mode *gv);
int et_blank(struct grf_softc *gp, int *on);
static int et_getControllerType(struct grf_softc *gp);
static int et_getDACType(struct grf_softc *gp);
int grfetmatch(struct device *, struct cfdata *, void *);
void grfetattach(struct device *, struct device *, void *);
int grfetprint(void *, const char *);
void et_memset(unsigned char *d, unsigned char c, int l);
/*
* Graphics display definitions.
* These are filled by 'grfconfig' using GRFIOCSETMON.
*/
#define monitor_def_max 24
static struct grfvideo_mode monitor_def[24] = {
{0}, {0}, {0}, {0}, {0}, {0}, {0}, {0},
{0}, {0}, {0}, {0}, {0}, {0}, {0}, {0},
{0}, {0}, {0}, {0}, {0}, {0}, {0}, {0}
};
static struct grfvideo_mode *monitor_current = &monitor_def[0];
/* Console display definition.
* Default hardcoded text mode. This grf_et is set up to
* use one text mode only, and this is it. You may use
* grfconfig to change the mode after boot.
*/
/* Console font */
#ifdef KFONT_8X11
#define TSENGFONT kernel_font_8x11
#define TSENGFONTY 11
#else
#define TSENGFONT kernel_font_8x8
#define TSENGFONTY 8
#endif
extern unsigned char TSENGFONT[];
struct grfettext_mode etconsole_mode = {
{255, "", 25000000, 640, 480, 4, 640/8, 680/8, 768/8, 800/8,
481, 491, 493, 525, 0},
8, TSENGFONTY, 640 / 8, 480 / TSENGFONTY, TSENGFONT, 32, 255
};
/* Console colors */
unsigned char etconscolors[3][3] = { /* background, foreground, hilite */
{0, 0x40, 0x50}, {152, 152, 152}, {255, 255, 255}
};
int ettype = 0; /* oMniBus, Domino or Merlin */
int etctype = 0; /* ET4000 or ETW32 */
int etdtype = 0; /* Type of DAC (see grf_etregs.h) */
char etcmap_shift = 0; /* 6 or 8 bit cmap entries */
unsigned char pass_toggle; /* passthru status tracker */
unsigned char Merlin_switch = 0;
/*
* Because all Tseng-boards have 2 configdev entries, one for
* framebuffer mem and the other for regs, we have to hold onto
* the pointers globally until we match on both. This and 'ettype'
* are the primary obsticles to multiple board support, but if you
* have multiple boards you have bigger problems than grf_et.
*/
static void *et_fbaddr = 0; /* framebuffer */
static void *et_regaddr = 0; /* registers */
static int et_fbsize; /* framebuffer size */
/* current sprite info, if you add support for multiple boards
* make this an array or something
*/
struct grf_spriteinfo et_cursprite;
/* sprite bitmaps in kernel stack, you'll need to arrayize these too if
* you add multiple board support
*/
static unsigned char et_imageptr[8 * 64], et_maskptr[8 * 64];
static unsigned char et_sprred[2], et_sprgreen[2], et_sprblue[2];
/* standard driver stuff */
CFATTACH_DECL(grfet, sizeof(struct grf_softc),
grfetmatch, grfetattach, NULL, NULL);
static struct cfdata *cfdata;
int
grfetmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
{
struct zbus_args *zap;
static int regprod, regprod2 = 0, fbprod;
zap = auxp;
#ifndef TSENGCONSOLE
if (amiga_realconfig == 0)
return (0);
#endif
/* Grab the first board we encounter as the preferred one. This will
* allow one board to work in a multiple Tseng board system, but not
* multiple boards at the same time. */
if (ettype == 0) {
switch (zap->manid) {
case OMNIBUS:
if (zap->prodid != 0)
return (0);
regprod = 0;
fbprod = 0;
break;
case DOMINO:
/* 2167/3 is Domino16M proto (crest) */
if (zap->prodid != 3 && zap->prodid != 2 && zap->prodid != 1)
return (0);
regprod = 2;
regprod2 = 3;
fbprod = 1;
break;
case MERLIN:
if (zap->prodid != 3 && zap->prodid != 4)
return (0);
regprod = 4;
fbprod = 3;
break;
default:
return (0);
}
ettype = zap->manid;
} else {
if (ettype != zap->manid) {
return (0);
}
}
/* Configure either registers or framebuffer in any order */
/* as said before, oMniBus does not support ProdID */
if (ettype == OMNIBUS) {
if (zap->size == 64 * 1024) {
/* register area */
et_regaddr = zap->va;
} else {
/* memory area */
et_fbaddr = zap->va;
et_fbsize = zap->size;
}
} else {
if (zap->prodid == regprod || zap->prodid == regprod2) {
et_regaddr = zap->va;
} else {
if (zap->prodid == fbprod) {
et_fbaddr = zap->va;
et_fbsize = zap->size;
} else {
return (0);
}
}
}
#ifdef TSENGCONSOLE
if (amiga_realconfig == 0) {
cfdata = cfp;
}
#endif
return (1);
}
void
grfetattach(struct device *pdp, struct device *dp, void *auxp)
{
static struct grf_softc congrf;
struct zbus_args *zap;
struct grf_softc *gp;
static char attachflag = 0;
zap = auxp;
printf("\n");
/* make sure both halves have matched */
if (!et_regaddr || !et_fbaddr)
return;
/* do all that messy console/grf stuff */
if (dp == NULL)
gp = &congrf;
else
gp = (struct grf_softc *) dp;
if (dp != NULL && congrf.g_regkva != 0) {
/*
* inited earlier, just copy (not device struct)
*/
bcopy(&congrf.g_display, &gp->g_display,
(char *) &gp[1] - (char *) &gp->g_display);
} else {
gp->g_regkva = (volatile caddr_t) et_regaddr;
gp->g_fbkva = (volatile caddr_t) et_fbaddr;
gp->g_unit = GRF_ET4000_UNIT;
gp->g_mode = et_mode;
gp->g_conpri = grfet_cnprobe();
gp->g_flags = GF_ALIVE;
/* wakeup the board */
et_boardinit(gp);
#ifdef TSENGCONSOLE
grfet_iteinit(gp);
(void) et_load_mon(gp, &etconsole_mode);
#endif
}
/*
* attach grf (once)
*/
if (amiga_config_found(cfdata, &gp->g_device, gp, grfetprint)) {
attachflag = 1;
printf("grfet: %dMB ", et_fbsize / 0x100000);
switch (ettype) {
case OMNIBUS:
printf("oMniBus");
break;
case DOMINO:
printf("Domino");
break;
case MERLIN:
printf("Merlin");
break;
}
printf(" with ");
switch (etctype) {
case ET4000:
printf("Tseng ET4000");
break;
case ETW32:
printf("Tseng ETW32");
break;
}
printf(" and ");
switch (etdtype) {
case SIERRA11483:
printf("Sierra SC11483 DAC");
break;
case SIERRA15025:
printf("Sierra SC15025 DAC");
break;
case MUSICDAC:
printf("MUSIC DAC");
break;
case MERLINDAC:
printf("BrookTree Bt482 DAC");
break;
case ATT20C491:
printf("AT&T ATT20c491 DAC");
break;
}
printf(" being used\n");
} else {
if (!attachflag)
printf("grfet unattached!!\n");
}
}
int
grfetprint(void *auxp, const char *pnp)
{
if (pnp)
aprint_normal("ite at %s: ", pnp);
return (UNCONF);
}
void
et_boardinit(struct grf_softc *gp)
{
unsigned char *ba = gp->g_regkva;
int x;
/* wakeup board and flip passthru OFF */
RegWakeup(ba);
RegOnpass(ba);
if (ettype == MERLIN) {
/* Merlin needs some special initialisations */
vgaw(ba, MERLIN_SWITCH_REG, 0);
delay(20000);
vgaw(ba, MERLIN_SWITCH_REG, 8);
delay(20000);
vgaw(ba, MERLIN_SWITCH_REG, 0);
delay(20000);
vgaw(ba, MERLIN_VDAC_DATA, 1);
vgaw(ba, MERLIN_VDAC_INDEX, 0x00);
vgaw(ba, MERLIN_VDAC_SPRITE, 0xff);
vgaw(ba, MERLIN_VDAC_INDEX, 0x01);
vgaw(ba, MERLIN_VDAC_SPRITE, 0x0f);
vgaw(ba, MERLIN_VDAC_INDEX, 0x02);
vgaw(ba, MERLIN_VDAC_SPRITE, 0x42);
vgaw(ba, MERLIN_VDAC_INDEX, 0x03);
vgaw(ba, MERLIN_VDAC_SPRITE, 0x00);
vgaw(ba, MERLIN_VDAC_DATA, 0);
}
/* setup initial unchanging parameters */
vgaw(ba, GREG_HERCULESCOMPAT + ((ettype == DOMINO) ? 0x0fff : 0), 0x03);
vgaw(ba, GREG_DISPMODECONTROL, 0xa0);
vgaw(ba, GREG_MISC_OUTPUT_W, 0x63);
if (ettype == DOMINO)
{
vgaw(ba, CRT_ADDRESS, CRT_ID_VIDEO_CONFIG1);
vgaw(ba, CRT_ADDRESS_W + 0x0fff,
0xc0 | vgar(ba, CRT_ADDRESS_R + 0x0fff));
}
WSeq(ba, SEQ_ID_RESET, 0x03);
WSeq(ba, SEQ_ID_CLOCKING_MODE, 0x21); /* 8 dot, Display off */
WSeq(ba, SEQ_ID_MAP_MASK, 0x0f);
WSeq(ba, SEQ_ID_CHAR_MAP_SELECT, 0x00);
WSeq(ba, SEQ_ID_MEMORY_MODE, 0x0e);
WSeq(ba, SEQ_ID_STATE_CONTROL, 0x00);
WSeq(ba, SEQ_ID_AUXILIARY_MODE, 0xf4);
WCrt(ba, CRT_ID_PRESET_ROW_SCAN, 0x00);
WCrt(ba, CRT_ID_CURSOR_START, 0x00);
WCrt(ba, CRT_ID_CURSOR_END, 0x08);
WCrt(ba, CRT_ID_START_ADDR_HIGH, 0x00);
WCrt(ba, CRT_ID_START_ADDR_LOW, 0x00);
WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00);
WCrt(ba, CRT_ID_CURSOR_LOC_LOW, 0x00);
WCrt(ba, CRT_ID_UNDERLINE_LOC, 0x67);
WCrt(ba, CRT_ID_MODE_CONTROL, 0xc3);
WCrt(ba, CRT_ID_LINE_COMPARE, 0xff);
/* ET4000 special */
WCrt(ba, CRT_ID_RASCAS_CONFIG, 0x28);
WCrt(ba, CRT_ID_EXT_START, 0x00);
WCrt(ba, CRT_ID_6845_COMPAT, 0x08);
/* ET4000/W32 special (currently only for Merlin (crest) */
if (ettype == MERLIN) {
WCrt(ba, CRT_ID_SEGMENT_COMP, 0x1c);
WCrt(ba, CRT_ID_GENERAL_PURPOSE, 0x00);
WCrt(ba, CRT_ID_VIDEO_CONFIG1, 0x93);
}
else {
WCrt(ba, CRT_ID_VIDEO_CONFIG1, 0xd3);
}
WCrt(ba, CRT_ID_VIDEO_CONFIG2, 0x0f);
WCrt(ba, CRT_ID_HOR_OVERFLOW, 0x00);
vgaw(ba, GREG_SEGMENTSELECT, 0x00);
WGfx(ba, GCT_ID_SET_RESET, 0x00);
WGfx(ba, GCT_ID_ENABLE_SET_RESET, 0x00);
WGfx(ba, GCT_ID_COLOR_COMPARE, 0x00);
WGfx(ba, GCT_ID_DATA_ROTATE, 0x00);
WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00);
WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x40);
WGfx(ba, GCT_ID_MISC, 0x01);
WGfx(ba, GCT_ID_COLOR_XCARE, 0x0f);
WGfx(ba, GCT_ID_BITMASK, 0xff);
for (x = 0; x < 0x10; x++)
WAttr(ba, x, x);
WAttr(ba, ACT_ID_ATTR_MODE_CNTL, 0x01);
WAttr(ba, ACT_ID_OVERSCAN_COLOR, 0x00);
WAttr(ba, ACT_ID_COLOR_PLANE_ENA, 0x0f);
WAttr(ba, ACT_ID_HOR_PEL_PANNING, 0x00);
WAttr(ba, ACT_ID_COLOR_SELECT, 0x00);
WAttr(ba, ACT_ID_MISCELLANEOUS, 0x00);
vgaw(ba, VDAC_MASK, 0xff);
delay(200000);
vgaw(ba, GREG_MISC_OUTPUT_W, 0xe3);
/* colors initially set to greyscale */
switch(ettype) {
case MERLIN:
vgaw(ba, MERLIN_VDAC_INDEX, 0);
for (x = 255; x >= 0; x--) {
vgaw(ba, MERLIN_VDAC_COLORS, x);
vgaw(ba, MERLIN_VDAC_COLORS, x);
vgaw(ba, MERLIN_VDAC_COLORS, x);
}
break;
default:
vgaw(ba, VDAC_ADDRESS_W, 0);
for (x = 255; x >= 0; x--) {
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0), x);
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0), x);
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0), x);
}
break;
}
/* set sprite bitmap pointers */
/* should work like that */
et_cursprite.image = et_imageptr;
et_cursprite.mask = et_maskptr;
et_cursprite.cmap.red = et_sprred;
et_cursprite.cmap.green = et_sprgreen;
et_cursprite.cmap.blue = et_sprblue;
/* card specific initialisations */
switch(ettype) {
case OMNIBUS:
etctype = et_getControllerType(gp);
etdtype = et_getDACType(gp);
break;
case MERLIN:
vgaw(ba, GREG_SEGMENTSELECT2, 0x00);
if (((vgar(ba, GREG_FEATURE_CONTROL_R) & 12) |
(vgar(ba, GREG_STATUS0_R) & 0x60)) == 0x24) {
WCrt(ba, CRT_ID_VIDEO_CONFIG2, 0x07); /* 1Mx4 RAM */
et_fbsize = 0x400000; /* 4 MB */
}
else {
/* check for 1MB or 2MB board (crest) */
/* has there a 1MB Merlin ever been sold ??? */
volatile unsigned long *et_fbtestaddr;
et_fbtestaddr = (volatile unsigned long *)gp->g_fbkva;
*et_fbtestaddr = 0x0;
vgaw(ba, GREG_SEGMENTSELECT2, 0x11); /* 1MB offset */
*et_fbtestaddr = 0x12345678;
vgaw(ba, GREG_SEGMENTSELECT2, 0x00);
if (*et_fbtestaddr == 0x0)
et_fbsize = 0x200000; /* 2 MB */
else
et_fbsize = 0x100000; /* 1 MB */
}
/* ZorroII can map 2 MB max ... */
if (!iszthreepa(kvtop(gp->g_fbkva)) && et_fbsize == 0x400000)
et_fbsize = 0x200000;
etctype = ETW32;
etdtype = MERLINDAC;
break;
case DOMINO:
etctype = ET4000;
etdtype = et_getDACType(gp);
break;
}
}
int
et_getvmode(struct grf_softc *gp, struct grfvideo_mode *vm)
{
struct grfvideo_mode *gv;
#ifdef TSENGCONSOLE
/* Handle grabbing console mode */
if (vm->mode_num == 255) {
bcopy(&etconsole_mode, vm, sizeof(struct grfvideo_mode));
/* XXX so grfconfig can tell us the correct text dimensions. */
vm->depth = etconsole_mode.fy;
} else
#endif
{
if (vm->mode_num == 0)
vm->mode_num = (monitor_current - monitor_def) + 1;
if (vm->mode_num < 1 || vm->mode_num > monitor_def_max)
return (EINVAL);
gv = monitor_def + (vm->mode_num - 1);
if (gv->mode_num == 0)
return (EINVAL);
bcopy(gv, vm, sizeof(struct grfvideo_mode));
}
/* adjust internal values to pixel values */
vm->hblank_start *= 8;
vm->hsync_start *= 8;
vm->hsync_stop *= 8;
vm->htotal *= 8;
return (0);
}
int
et_setvmode(struct grf_softc *gp, unsigned mode)
{
if (!mode || (mode > monitor_def_max) ||
monitor_def[mode - 1].mode_num == 0)
return (EINVAL);
monitor_current = monitor_def + (mode - 1);
return (0);
}
#ifndef TSENGCONSOLE
void
et_off(struct grf_softc *gp)
{
char *ba = gp->g_regkva;
RegOnpass(ba);
WSeq(ba, SEQ_ID_CLOCKING_MODE, 0x21);
}
#endif
int
et_blank(struct grf_softc *gp, int *on)
{
WSeq(gp->g_regkva, SEQ_ID_CLOCKING_MODE, *on > 0 ? 0x01 : 0x21);
return(0);
}
/*
* Change the mode of the display.
* Return a UNIX error number or 0 for success.
*/
int
et_mode(register struct grf_softc *gp, u_long cmd, void *arg, u_long a2,
int a3)
{
int error;
switch (cmd) {
case GM_GRFON:
error = et_load_mon(gp,
(struct grfettext_mode *) monitor_current) ? 0 : EINVAL;
return (error);
case GM_GRFOFF:
#ifndef TSENGCONSOLE
et_off(gp);
#else
et_load_mon(gp, &etconsole_mode);
#endif
return (0);
case GM_GRFCONFIG:
return (0);
case GM_GRFGETVMODE:
return (et_getvmode(gp, (struct grfvideo_mode *) arg));
case GM_GRFSETVMODE:
error = et_setvmode(gp, *(unsigned *) arg);
if (!error && (gp->g_flags & GF_GRFON))
et_load_mon(gp,
(struct grfettext_mode *) monitor_current);
return (error);
case GM_GRFGETNUMVM:
*(int *) arg = monitor_def_max;
return (0);
case GM_GRFIOCTL:
return (et_ioctl(gp, a2, arg));
default:
break;
}
return (EPASSTHROUGH);
}
int
et_ioctl(register struct grf_softc *gp, u_long cmd, void *data)
{
switch (cmd) {
case GRFIOCGSPRITEPOS:
return (et_getmousepos(gp, (struct grf_position *) data));
case GRFIOCSSPRITEPOS:
return (et_setmousepos(gp, (struct grf_position *) data));
case GRFIOCSSPRITEINF:
return (et_setspriteinfo(gp, (struct grf_spriteinfo *) data));
case GRFIOCGSPRITEINF:
return (et_getspriteinfo(gp, (struct grf_spriteinfo *) data));
case GRFIOCGSPRITEMAX:
return (et_getspritemax(gp, (struct grf_position *) data));
case GRFIOCGETCMAP:
return (et_getcmap(gp, (struct grf_colormap *) data));
case GRFIOCPUTCMAP:
return (et_putcmap(gp, (struct grf_colormap *) data));
case GRFIOCBITBLT:
break;
case GRFTOGGLE:
return (et_toggle(gp, 0));
case GRFIOCSETMON:
return (et_setmonitor(gp, (struct grfvideo_mode *) data));
case GRFIOCBLANK:
return (et_blank(gp, (int *)data));
}
return (EPASSTHROUGH);
}
int
et_getmousepos(struct grf_softc *gp, struct grf_position *data)
{
data->x = et_cursprite.pos.x;
data->y = et_cursprite.pos.y;
return (0);
}
void
et_writesprpos(volatile char *ba, short x, short y)
{
}
int
et_setmousepos(struct grf_softc *gp, struct grf_position *data)
{
volatile char *ba = gp->g_regkva;
short rx, ry, prx, pry;
/* no movement */
if (et_cursprite.pos.x == data->x && et_cursprite.pos.y == data->y)
return (0);
/* current and previous real coordinates */
rx = data->x - et_cursprite.hot.x;
ry = data->y - et_cursprite.hot.y;
prx = et_cursprite.pos.x - et_cursprite.hot.x;
pry = et_cursprite.pos.y - et_cursprite.hot.y;
/* if we are/were on an edge, create (un)shifted bitmap --
* ripped out optimization (not extremely worthwhile,
* and kind of buggy anyhow).
*/
/* do movement, save position */
et_writesprpos(ba, rx < 0 ? 0 : rx, ry < 0 ? 0 : ry);
et_cursprite.pos.x = data->x;
et_cursprite.pos.y = data->y;
return (0);
}
int
et_getspriteinfo(struct grf_softc *gp, struct grf_spriteinfo *data)
{
return(EINVAL);
}
static int
et_setspriteinfo(struct grf_softc *gp, struct grf_spriteinfo *data)
{
return(EINVAL);
}
static int
et_getspritemax(struct grf_softc *gp, struct grf_position *data)
{
return(EINVAL);
}
int
et_setmonitor(struct grf_softc *gp, struct grfvideo_mode *gv)
{
struct grfvideo_mode *md;
if (!et_mondefok(gv))
return(EINVAL);
#ifdef TSENGCONSOLE
/* handle interactive setting of console mode */
if (gv->mode_num == 255) {
bcopy(gv, &etconsole_mode.gv, sizeof(struct grfvideo_mode));
etconsole_mode.gv.hblank_start /= 8;
etconsole_mode.gv.hsync_start /= 8;
etconsole_mode.gv.hsync_stop /= 8;
etconsole_mode.gv.htotal /= 8;
etconsole_mode.rows = gv->disp_height / etconsole_mode.fy;
etconsole_mode.cols = gv->disp_width / etconsole_mode.fx;
if (!(gp->g_flags & GF_GRFON))
et_load_mon(gp, &etconsole_mode);
ite_reinit(gp->g_itedev);
return (0);
}
#endif
md = monitor_def + (gv->mode_num - 1);
bcopy(gv, md, sizeof(struct grfvideo_mode));
/* adjust pixel oriented values to internal rep. */
md->hblank_start /= 8;
md->hsync_start /= 8;
md->hsync_stop /= 8;
md->htotal /= 8;
return (0);
}
int
et_getcmap(struct grf_softc *gfp, struct grf_colormap *cmap)
{
volatile unsigned char *ba;
u_char red[256], green[256], blue[256], *rp, *gp, *bp;
short x;
int error;
if (cmap->count == 0 || cmap->index >= 256)
return 0;
if (cmap->count > 256 - cmap->index)
cmap->count = 256 - cmap->index;
ba = gfp->g_regkva;
/* first read colors out of the chip, then copyout to userspace */
x = cmap->count - 1;
rp = red + cmap->index;
gp = green + cmap->index;
bp = blue + cmap->index;
switch(ettype) {
case MERLIN:
vgaw(ba, MERLIN_VDAC_INDEX, cmap->index);
do {
*rp++ = vgar(ba, MERLIN_VDAC_COLORS);
*gp++ = vgar(ba, MERLIN_VDAC_COLORS);
*bp++ = vgar(ba, MERLIN_VDAC_COLORS);
} while (x-- > 0);
break;
default:
vgaw(ba, VDAC_ADDRESS_R+((ettype==DOMINO)?0x0fff:0), cmap->index);
do {
*rp++ = vgar(ba, VDAC_DATA+((ettype==DOMINO)?0x0fff:0)) << etcmap_shift;
*gp++ = vgar(ba, VDAC_DATA+((ettype==DOMINO)?0x0fff:0)) << etcmap_shift;
*bp++ = vgar(ba, VDAC_DATA+((ettype==DOMINO)?0x0fff:0)) << etcmap_shift;
} while (x-- > 0);
break;
}
error = copyout(red + cmap->index, cmap->red, cmap->count);
if (!error)
error = copyout(green + cmap->index, cmap->green, cmap->count);
if (!error)
error = copyout(blue + cmap->index, cmap->blue, cmap->count);
return (error);
}
int
et_putcmap(struct grf_softc *gfp, struct grf_colormap *cmap)
{
volatile unsigned char *ba;
u_char red[256], green[256], blue[256], *rp, *gp, *bp;
short x;
int error;
if (cmap->count == 0 || cmap->index >= 256)
return (0);
if (cmap->count > 256 - cmap->index)
cmap->count = 256 - cmap->index;
/* first copy the colors into kernelspace */
if ((error = copyin(cmap->red, red + cmap->index, cmap->count)))
return (error);
if ((error = copyin(cmap->green, green + cmap->index, cmap->count)))
return (error);
if ((error = copyin(cmap->blue, blue + cmap->index, cmap->count)))
return (error);
ba = gfp->g_regkva;
x = cmap->count - 1;
rp = red + cmap->index;
gp = green + cmap->index;
bp = blue + cmap->index;
switch(ettype){
case MERLIN:
vgaw(ba, MERLIN_VDAC_INDEX, cmap->index);
do {
vgaw(ba, MERLIN_VDAC_COLORS, *rp++);
vgaw(ba, MERLIN_VDAC_COLORS, *gp++);
vgaw(ba, MERLIN_VDAC_COLORS, *bp++);
} while (x-- > 0);
break;
default:
vgaw(ba, VDAC_ADDRESS_W, cmap->index);
do {
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0),
*rp++ >> etcmap_shift);
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0),
*gp++ >> etcmap_shift);
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0),
*bp++ >> etcmap_shift);
} while (x-- > 0);
break;
}
return (0);
}
int
et_toggle(struct grf_softc *gp, unsigned short wopp)
/* (variable wopp) don't need that one yet, ill */
{
volatile unsigned char *ba;
ba = gp->g_regkva;
if (pass_toggle) {
RegOffpass(ba);
} else {
RegOnpass(ba);
}
return (0);
}
#define ET_NUMCLOCKS 32
static u_char et_clocks[ET_NUMCLOCKS] = {
0, 1, 6, 2, 3, 7, 4, 5,
0, 1, 6, 2, 3, 7, 4, 5,
0, 1, 6, 2, 3, 7, 4, 5,
0, 1, 6, 2, 3, 7, 4, 5
};
static u_char et_clockdividers[ET_NUMCLOCKS] = {
3, 3, 3, 3, 3, 3, 3, 3,
2, 2, 2, 2, 2, 2, 2, 2,
1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0
};
static u_int et_clockfreqs[ET_NUMCLOCKS] = {
6293750, 7080500, 7875000, 8125000,
9000000, 9375000, 10000000, 11225000,
12587500, 14161000, 15750000, 16250000,
18000000, 18750000, 20000000, 22450000,
25175000, 28322000, 31500000, 32500000,
36000000, 37500000, 40000000, 44900000,
50350000, 56644000, 63000000, 65000000,
72000000, 75000000, 80000000, 89800000
};
static void
et_CompFQ(u_int fq, u_char *num, u_char *denom)
{
int i;
for (i=0; i < ET_NUMCLOCKS;) {
if (fq <= et_clockfreqs[i++]) {
break;
}
}
*num = et_clocks[--i];
*denom = et_clockdividers[i];
return;
}
int
et_mondefok(struct grfvideo_mode *gv)
{
unsigned long maxpix;
if (gv->mode_num < 1 || gv->mode_num > monitor_def_max)
if (gv->mode_num != 255 || gv->depth != 4)
return(0);
switch (gv->depth) {
case 4:
if (gv->mode_num != 255)
return(0);
case 1:
case 8:
maxpix = 85000000;
break;
case 15:
case 16:
maxpix = 45000000;
break;
case 24:
maxpix = 28000000;
break;
case 32:
maxpix = 21000000;
break;
default:
printf("grfet: Illegal depth in mode %d\n",
(int) gv->mode_num);
return (0);
}
if (gv->pixel_clock > maxpix) {
printf("grfet: Pixelclock too high in mode %d\n",
(int) gv->mode_num);
return (0);
}
if (gv->disp_flags & GRF_FLAGS_SYNC_ON_GREEN) {
printf("grfet: sync-on-green is not supported\n");
return (0);
}
return (1);
}
int
et_load_mon(struct grf_softc *gp, struct grfettext_mode *md)
{
struct grfvideo_mode *gv;
struct grfinfo *gi;
volatile unsigned char *ba;
unsigned char num0, denom0;
unsigned short HT, HDE, HBS, HBE, HSS, HSE, VDE, VBS, VBE, VSS,
VSE, VT;
unsigned char hvsync_pulse, seq;
char TEXT;
int hmul;
/* identity */
gv = &md->gv;
TEXT = (gv->depth == 4);
if (!et_mondefok(gv)) {
printf("grfet: Monitor definition not ok\n");
return (0);
}
ba = gp->g_regkva;
/* provide all needed information in grf device-independant locations */
gp->g_data = (caddr_t) gv;
gi = &gp->g_display;
gi->gd_regaddr = (caddr_t) ztwopa(ba);
gi->gd_regsize = 64 * 1024;
gi->gd_fbaddr = (caddr_t) kvtop(gp->g_fbkva);
gi->gd_fbsize = et_fbsize;
gi->gd_colors = 1 << gv->depth;
gi->gd_planes = gv->depth;
gi->gd_fbwidth = gv->disp_width;
gi->gd_fbheight = gv->disp_height;
gi->gd_fbx = 0;
gi->gd_fby = 0;
if (TEXT) {
gi->gd_dwidth = md->fx * md->cols;
gi->gd_dheight = md->fy * md->rows;
} else {
gi->gd_dwidth = gv->disp_width;
gi->gd_dheight = gv->disp_height;
}
gi->gd_dx = 0;
gi->gd_dy = 0;
/* get display mode parameters */
HBS = gv->hblank_start;
HSS = gv->hsync_start;
HSE = gv->hsync_stop;
HBE = gv->htotal - 1;
HT = gv->htotal;
VBS = gv->vblank_start;
VSS = gv->vsync_start;
VSE = gv->vsync_stop;
VBE = gv->vtotal - 1;
VT = gv->vtotal;
if (TEXT)
HDE = ((gv->disp_width + md->fx - 1) / md->fx) - 1;
else
HDE = (gv->disp_width + 3) / 8 - 1; /* HBS; */
VDE = gv->disp_height - 1;
/* adjustments (crest) */
switch (gv->depth) {
case 15:
case 16:
hmul = 2;
break;
case 24:
hmul = 3;
break;
case 32:
hmul = 4;
break;
default:
hmul = 1;
break;
}
HDE *= hmul;
HBS *= hmul;
HSS *= hmul;
HSE *= hmul;
HBE *= hmul;
HT *= hmul;
if (gv->disp_flags & GRF_FLAGS_LACE) {
VDE /= 2;
VT = VT + 1;
}
if (gv->disp_flags & GRF_FLAGS_DBLSCAN) {
VDE *= 2;
VBS *= 2;
VSS *= 2;
VSE *= 2;
VBE *= 2;
VT *= 2;
}
WSeq(ba, SEQ_ID_MEMORY_MODE, (TEXT || (gv->depth == 1)) ? 0x06 : 0x0e);
WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00);
WSeq(ba, SEQ_ID_MAP_MASK, (gv->depth == 1) ? 0x01 : 0xff);
WSeq(ba, SEQ_ID_CHAR_MAP_SELECT, 0x00);
/* Set clock */
et_CompFQ( gv->pixel_clock * hmul, &num0, &denom0);
/* Horizontal/Vertical Sync Pulse */
hvsync_pulse = 0xe3;
if (gv->disp_flags & GRF_FLAGS_PHSYNC)
hvsync_pulse &= ~0x40;
else
hvsync_pulse |= 0x40;
if (gv->disp_flags & GRF_FLAGS_PVSYNC)
hvsync_pulse &= ~0x80;
else
hvsync_pulse |= 0x80;
vgaw(ba, GREG_MISC_OUTPUT_W, hvsync_pulse | ((num0 & 3) << 2));
WCrt(ba, CRT_ID_6845_COMPAT, (num0 & 4) ? 0x0a : 0x08);
seq = RSeq(ba, SEQ_ID_CLOCKING_MODE);
switch(denom0) {
case 0:
WSeq(ba, SEQ_ID_AUXILIARY_MODE, 0xb4);
WSeq(ba, SEQ_ID_CLOCKING_MODE, seq & 0xf7);
break;
case 1:
WSeq(ba, SEQ_ID_AUXILIARY_MODE, 0xf4);
WSeq(ba, SEQ_ID_CLOCKING_MODE, seq & 0xf7);
break;
case 2:
WSeq(ba, SEQ_ID_AUXILIARY_MODE, 0xf5);
WSeq(ba, SEQ_ID_CLOCKING_MODE, seq & 0xf7);
break;
case 3:
WSeq(ba, SEQ_ID_AUXILIARY_MODE, 0xf5);
WSeq(ba, SEQ_ID_CLOCKING_MODE, seq | 0x08);
break;
}
/* load display parameters into board */
WCrt(ba, CRT_ID_HOR_TOTAL, HT);
WCrt(ba, CRT_ID_HOR_DISP_ENA_END, ((HDE >= HBS) ? HBS - 1 : HDE));
WCrt(ba, CRT_ID_START_HOR_BLANK, HBS);
WCrt(ba, CRT_ID_END_HOR_BLANK, (HBE & 0x1f) | 0x80);
WCrt(ba, CRT_ID_START_HOR_RETR, HSS);
WCrt(ba, CRT_ID_END_HOR_RETR,
(HSE & 0x1f) |
((HBE & 0x20) ? 0x80 : 0x00));
WCrt(ba, CRT_ID_VER_TOTAL, VT);
WCrt(ba, CRT_ID_OVERFLOW,
0x10 |
((VT & 0x100) ? 0x01 : 0x00) |
((VDE & 0x100) ? 0x02 : 0x00) |
((VSS & 0x100) ? 0x04 : 0x00) |
((VBS & 0x100) ? 0x08 : 0x00) |
((VT & 0x200) ? 0x20 : 0x00) |
((VDE & 0x200) ? 0x40 : 0x00) |
((VSS & 0x200) ? 0x80 : 0x00));
WCrt(ba, CRT_ID_MAX_ROW_ADDRESS,
0x40 | /* splitscreen not visible */
((gv->disp_flags & GRF_FLAGS_DBLSCAN) ? 0x80 : 0x00) |
((VBS & 0x200) ? 0x20 : 0x00) |
(TEXT ? ((md->fy - 1) & 0x1f) : 0x00));
WCrt(ba, CRT_ID_MODE_CONTROL,
((TEXT || (gv->depth == 1)) ? 0xc3 : 0xab));
/* text cursor */
if (TEXT) {
#if ET_ULCURSOR
WCrt(ba, CRT_ID_CURSOR_START, (md->fy & 0x1f) - 2);
WCrt(ba, CRT_ID_CURSOR_END, (md->fy & 0x1f) - 1);
#else
WCrt(ba, CRT_ID_CURSOR_START, 0x00);
WCrt(ba, CRT_ID_CURSOR_END, md->fy & 0x1f);
#endif
WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00);
WCrt(ba, CRT_ID_CURSOR_LOC_LOW, 0x00);
}
WCrt(ba, CRT_ID_UNDERLINE_LOC, ((md->fy - 1) & 0x1f)
| ((TEXT || (gv->depth == 1)) ? 0x00 : 0x60));
WCrt(ba, CRT_ID_START_ADDR_HIGH, 0x00);
WCrt(ba, CRT_ID_START_ADDR_LOW, 0x00);
WCrt(ba, CRT_ID_START_VER_RETR, VSS);
WCrt(ba, CRT_ID_END_VER_RETR, (VSE & 0x0f) | 0x30);
WCrt(ba, CRT_ID_VER_DISP_ENA_END, VDE);
WCrt(ba, CRT_ID_START_VER_BLANK, VBS);
WCrt(ba, CRT_ID_END_VER_BLANK, VBE);
WCrt(ba, CRT_ID_LINE_COMPARE, 0xff);
WCrt(ba, CRT_ID_OVERFLOW_HIGH,
((VBS & 0x400) ? 0x01 : 0x00) |
((VT & 0x400) ? 0x02 : 0x00) |
((VDE & 0x400) ? 0x04 : 0x00) |
((VSS & 0x400) ? 0x08 : 0x00) |
0x10 |
((gv->disp_flags & GRF_FLAGS_LACE) ? 0x80 : 0x00));
WCrt(ba, CRT_ID_HOR_OVERFLOW,
((HT & 0x100) ? 0x01 : 0x00) |
((HBS & 0x100) ? 0x04 : 0x00) |
((HSS & 0x100) ? 0x10 : 0x00)
);
/* depth dependent stuff */
WGfx(ba, GCT_ID_GRAPHICS_MODE,
((TEXT || (gv->depth == 1)) ? 0x00 : 0x40));
WGfx(ba, GCT_ID_MISC, (TEXT ? 0x04 : 0x01));
vgaw(ba, VDAC_MASK, 0xff);
vgar(ba, VDAC_MASK);
vgar(ba, VDAC_MASK);
vgar(ba, VDAC_MASK);
vgar(ba, VDAC_MASK);
switch (gv->depth) {
case 1:
case 4: /* text */
switch(etdtype) {
case SIERRA11483:
case SIERRA15025:
case MUSICDAC:
vgaw(ba, VDAC_MASK, 0);
break;
case ATT20C491:
vgaw(ba, VDAC_MASK, 0x02);
break;
case MERLINDAC:
setMerlinDACmode(ba, 0);
break;
}
HDE = gv->disp_width / 16;
break;
case 8:
switch(etdtype) {
case SIERRA11483:
case SIERRA15025:
case MUSICDAC:
vgaw(ba, VDAC_MASK, 0);
break;
case ATT20C491:
vgaw(ba, VDAC_MASK, 0x02);
break;
case MERLINDAC:
setMerlinDACmode(ba, 0);
break;
}
HDE = gv->disp_width / 8;
break;
case 15:
switch(etdtype) {
case SIERRA11483:
case SIERRA15025:
case MUSICDAC:
case ATT20C491:
vgaw(ba, VDAC_MASK, 0xa0);
break;
case MERLINDAC:
setMerlinDACmode(ba, 0xa0);
break;
}
HDE = gv->disp_width / 4;
break;
case 16:
switch(etdtype) {
case SIERRA11483:
vgaw(ba, VDAC_MASK, 0); /* illegal mode! */
break;
case SIERRA15025:
vgaw(ba, VDAC_MASK, 0xe0);
break;
case MUSICDAC:
case ATT20C491:
vgaw(ba, VDAC_MASK, 0xc0);
break;
case MERLINDAC:
setMerlinDACmode(ba, 0xe0);
break;
}
HDE = gv->disp_width / 4;
break;
case 24:
switch(etdtype) {
case SIERRA11483:
vgaw(ba, VDAC_MASK, 0); /* illegal mode! */
break;
case SIERRA15025:
vgaw(ba, VDAC_MASK, 0xe1);
break;
case MUSICDAC:
case ATT20C491:
vgaw(ba, VDAC_MASK, 0xe0);
break;
case MERLINDAC:
setMerlinDACmode(ba, 0xf0);
break;
}
HDE = (gv->disp_width / 8) * 3;
break;
case 32:
switch(etdtype) {
case SIERRA11483:
case MUSICDAC:
case ATT20C491:
vgaw(ba, VDAC_MASK, 0); /* illegal mode! */
break;
case SIERRA15025:
vgaw(ba, VDAC_MASK, 0x61);
break;
case MERLINDAC:
setMerlinDACmode(ba, 0xb0);
break;
}
HDE = gv->disp_width / 2;
break;
}
WAttr(ba, ACT_ID_ATTR_MODE_CNTL, (TEXT ? 0x0a : 0x01));
WAttr(ba, 0x20 | ACT_ID_COLOR_PLANE_ENA,
(gv->depth == 1) ? 0x01 : 0x0f);
WCrt(ba, CRT_ID_OFFSET, HDE);
vgaw(ba, CRT_ADDRESS, CRT_ID_HOR_OVERFLOW);
vgaw(ba, CRT_ADDRESS_W,
(vgar(ba, CRT_ADDRESS_R) & 0x7f)
| ((HDE & 0x100) ? 0x80: 0x00));
/* text initialization */
if (TEXT) {
et_inittextmode(gp);
}
WSeq(ba, SEQ_ID_CLOCKING_MODE, 0x01);
/* Pass-through */
RegOffpass(ba);
return (1);
}
void
et_inittextmode(struct grf_softc *gp)
{
struct grfettext_mode *tm = (struct grfettext_mode *) gp->g_data;
volatile unsigned char *ba = gp->g_regkva;
unsigned char *fb = gp->g_fbkva;
unsigned char *c, *f, y;
unsigned short z;
/*
* load text font into beginning of display memory. Each character
* cell is 32 bytes long (enough for 4 planes)
*/
SetTextPlane(ba, 0x02);
et_memset(fb, 0, 256 * 32);
c = (unsigned char *) (fb) + (32 * tm->fdstart);
f = tm->fdata;
for (z = tm->fdstart; z <= tm->fdend; z++, c += (32 - tm->fy))
for (y = 0; y < tm->fy; y++)
*c++ = *f++;
/* clear out text/attr planes (three screens worth) */
SetTextPlane(ba, 0x01);
et_memset(fb, 0x07, tm->cols * tm->rows * 3);
SetTextPlane(ba, 0x00);
et_memset(fb, 0x20, tm->cols * tm->rows * 3);
/* print out a little init msg */
c = (unsigned char *) (fb) + (tm->cols - 16);
strcpy(c, "TSENG");
c[5] = 0x20;
/* set colors (B&W) */
switch(ettype) {
case MERLIN:
vgaw(ba, MERLIN_VDAC_INDEX, 0);
for (z = 0; z < 256; z++) {
y = (z & 1) ? ((z > 7) ? 2 : 1) : 0;
vgaw(ba, MERLIN_VDAC_COLORS, etconscolors[y][0]);
vgaw(ba, MERLIN_VDAC_COLORS, etconscolors[y][1]);
vgaw(ba, MERLIN_VDAC_COLORS, etconscolors[y][2]);
}
break;
default:
vgaw(ba, VDAC_ADDRESS_W, 0);
for (z = 0; z < 256; z++) {
y = (z & 1) ? ((z > 7) ? 2 : 1) : 0;
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0),
etconscolors[y][0] >> etcmap_shift);
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0),
etconscolors[y][1] >> etcmap_shift);
vgaw(ba, VDAC_DATA + ((ettype == DOMINO) ? 0x0fff : 0),
etconscolors[y][2] >> etcmap_shift);
}
break;
}
}
void
et_memset(unsigned char *d, unsigned char c, int l)
{
for (; l > 0; l--)
*d++ = c;
}
static int
et_getControllerType(struct grf_softc *gp)
{
unsigned char *ba = gp->g_regkva; /* register base */
unsigned char *mem = gp->g_fbkva; /* memory base */
unsigned char *mmu = mem + MMU_APERTURE0; /* MMU aperture 0 base */
*mem = 0;
/* make ACL visible */
if (ettype == MERLIN) {
WCrt(ba, CRT_ID_VIDEO_CONFIG1, 0xbb);
} else {
WCrt(ba, CRT_ID_VIDEO_CONFIG1, 0xfb);
}
WIma(ba, IMA_PORTCONTROL, 0x01);
*((unsigned long *)mmu) = 0;
*(mem + 0x13) = 0x38;
*mmu = 0xff;
/* hide ACL */
WIma(ba, IMA_PORTCONTROL, 0x00);
if (ettype == MERLIN) {
WCrt(ba, CRT_ID_VIDEO_CONFIG1, 0x93);
} else {
WCrt(ba, CRT_ID_VIDEO_CONFIG1, 0xd3);
}
return ((*mem == 0xff) ? ETW32 : ET4000);
}
static int
et_getDACType(struct grf_softc *gp)
{
unsigned char *ba = gp->g_regkva;
union {
int tt;
char cc[4];
} check;
/* check for Sierra SC 15025 */
/* We MUST do 4 HW reads to switch into command mode */
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, VDAC_COMMAND, 0x10); /* set ERPF */
vgaw(ba, VDAC_XINDEX, 9);
check.cc[0] = vgar(ba, VDAC_XDATA);
vgaw(ba, VDAC_XINDEX, 10);
check.cc[1] = vgar(ba, VDAC_XDATA);
vgaw(ba, VDAC_XINDEX, 11);
check.cc[2] = vgar(ba, VDAC_XDATA);
vgaw(ba, VDAC_XINDEX, 12);
check.cc[3] = vgar(ba, VDAC_XDATA);
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, VDAC_COMMAND, 0x00); /* clear ERPF */
if (check.tt == 0x533ab141) {
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, VDAC_COMMAND, 0x10); /* set ERPF */
/* switch to 8 bits per color */
vgaw(ba, VDAC_XINDEX, 8);
vgaw(ba, VDAC_XDATA, 1);
/* do not shift color values */
etcmap_shift = 0;
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, VDAC_COMMAND, 0x00); /* clear ERPF */
vgaw(ba, VDAC_MASK, 0xff);
return (SIERRA15025);
}
/* check for MUSIC DAC */
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, VDAC_COMMAND, 0x02); /* set some strange MUSIC mode (???) */
vgaw(ba, VDAC_XINDEX, 0x01);
if (vgar(ba, VDAC_XDATA) == 0x01) {
/* shift color values by 2 */
etcmap_shift = 2;
vgaw(ba, VDAC_MASK, 0xff);
return (MUSICDAC);
}
/* check for AT&T ATT20c491 DAC (crest) */
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, HDR, 0xff);
vgaw(ba, VDAC_MASK, 0x01);
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
if (vgar(ba, HDR) == 0xff) {
/* do not shift color values */
etcmap_shift = 0;
vgaw(ba, VDAC_MASK, 0xff);
return (ATT20C491);
}
/* restore PowerUp settings (crest) */
if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR)); if (vgar(ba, HDR));
vgaw(ba, HDR, 0x00);
/*
* nothing else found, so let us pretend it is a stupid
* Sierra SC 11483
*/
/* shift color values by 2 */
etcmap_shift = 2;
vgaw(ba, VDAC_MASK, 0xff);
return (SIERRA11483);
}
#endif /* NGRFET */
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