NetBSD/sys/arch/pmax/dev/bt459.c

597 lines
15 KiB
C

/* $NetBSD: bt459.c,v 1.11 1998/04/20 05:24:17 jonathan Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell and Rick Macklem.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
*
* from: @(#)sfb.c 8.1 (Berkeley) 6/10/93
*/
/*
* devGraphics.c --
*
* This file contains machine-dependent routines for the graphics device.
*
* Copyright (C) 1989 Digital Equipment Corporation.
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies.
* Digital Equipment Corporation makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/devGraphics.c,
* v 9.2 90/02/13 22:16:24 shirriff Exp SPRITE (DECWRL)";
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: bt459.c,v 1.11 1998/04/20 05:24:17 jonathan Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/select.h>
#include <machine/bus.h> /* wbflush() */
#include <machine/pmioctl.h>
#include <machine/fbio.h>
#include <machine/fbvar.h>
#include <pmax/dev/fbreg.h>
#include <pmax/dev/bt459.h> /* chipset definitions */
/*
* Forward references.
*/
static void bt459_set_cursor_ram (struct fbinfo *, int, u_char);
static void bt459_select_reg (bt459_regmap_t *, int);
static void bt459_write_reg (bt459_regmap_t *, int, int);
static u_char bt459_read_reg (bt459_regmap_t *, int);
static __inline void bt459_cursor_on(bt459_regmap_t *);
static __inline void bt459_cursor_off(bt459_regmap_t *);
/*
* Initialization
*/
int
bt459init(fi)
struct fbinfo *fi;
{
register bt459_regmap_t *regs = (bt459_regmap_t *)(fi -> fi_vdac);
u_char foo;
foo = bt459_read_reg (regs, BT459_REG_ID);
if (bt459_read_reg(regs, BT459_REG_ID) != 0x4a)
return (0);
#ifdef FOO /* @@@ DON'T KNOW HOW TO DO THIS @@@ */
/* Reset the chip */
*(volatile int *)(fi->fi_base + SFB_OFFSET_RESET) = 0;
DELAY(2000); /* ???? check right time on specs! ???? */
#endif /* FOO */
/* use 4:1 input mux */
bt459_write_reg(regs, BT459_REG_CMD0, 0x40);
/* no zooming, no panning */
bt459_write_reg(regs, BT459_REG_CMD1, 0x00);
/*
* signature test, X-windows cursor, no overlays, SYNC* PLL,
* normal RAM select, 7.5 IRE pedestal, do sync
*/
/*XXX*/ /* FIXME */
#if 0
#ifndef PMAX
/* whats this for then ?? */
bt459_write_reg(regs, BT459_REG_CMD2, 0xc2);
#else /* PMAX */
bt459_write_reg(regs, BT459_REG_CMD2, 0xc0);
#endif /* PMAX */
#else
bt459_write_reg(regs, BT459_REG_CMD2, 0xc0);
#endif
/* get all pixel bits */
bt459_write_reg(regs, BT459_REG_PRM, 0xff);
/* no blinking */
bt459_write_reg(regs, BT459_REG_PBM, 0x00);
/* no overlay */
bt459_write_reg(regs, BT459_REG_ORM, 0x00);
/* no overlay blink */
bt459_write_reg(regs, BT459_REG_OBM, 0x00);
/* no interleave, no underlay */
bt459_write_reg(regs, BT459_REG_ILV, 0x00);
/* normal operation, no signature analysis */
bt459_write_reg(regs, BT459_REG_TEST, 0x00);
/*
* no blinking, 1bit cross hair, XOR reg&crosshair,
* no crosshair on either plane 0 or 1,
* regular cursor on both planes.
*/
bt459_cursor_on(regs);
/* home cursor */
bt459_write_reg(regs, BT459_REG_CXLO, 0x00);
bt459_write_reg(regs, BT459_REG_CXHI, 0x00);
bt459_write_reg(regs, BT459_REG_CYLO, 0x00);
bt459_write_reg(regs, BT459_REG_CYHI, 0x00);
/* no crosshair window */
bt459_write_reg(regs, BT459_REG_WXLO, 0x00);
bt459_write_reg(regs, BT459_REG_WXHI, 0x00);
bt459_write_reg(regs, BT459_REG_WYLO, 0x00);
bt459_write_reg(regs, BT459_REG_WYHI, 0x00);
bt459_write_reg(regs, BT459_REG_WWLO, 0x00);
bt459_write_reg(regs, BT459_REG_WWHI, 0x00);
bt459_write_reg(regs, BT459_REG_WHLO, 0x00);
bt459_write_reg(regs, BT459_REG_WHHI, 0x00);
/* Initialize the cursor position... */
fi -> fi_cursor.width = 64;
fi -> fi_cursor.height = 64;
fi -> fi_cursor.x = 0;
fi -> fi_cursor.y = 0;
/*
* Initialize the color map and the screen.
*/
bt459InitColorMap(fi);
return (1);
}
static u_char cursor_RGB[6]; /* cursor color 2 & 3 */
/*
* Enable the hardware cursor sprite.
*/
static __inline void
bt459_cursor_on(btregs)
register bt459_regmap_t *btregs;
{
/*
* no blinking, 1bit cross hair, XOR reg&crosshair,
* no crosshair on either plane 0 or 1,
* regular cursor on both planes.
*/
bt459_write_reg(btregs, BT459_REG_CCR, 0xc0);
}
/*
* Disable the hardware cursor sprite.
*/
static __inline void
bt459_cursor_off(btregs)
register bt459_regmap_t *btregs;
{
bt459_write_reg(btregs, BT459_REG_CCR, 0x00);
}
/*
* XXX This assumes 2bits/cursor pixel so that the 1Kbyte cursor RAM
* defines a 64x64 cursor. If the bt459 does not map the cursor RAM
* this way, this code is Screwed!
*/
void
bt459LoadCursor(fi, cursor)
struct fbinfo *fi;
u_short *cursor;
{
register int i, j, k, pos;
register u_short ap, bp, out;
/*
* Fill in the cursor sprite using the A and B planes, as provided
* for the pmax.
* XXX This will have to change when the X server knows that this
* is not a pmax display.
*/
pos = 0;
for (k = 0; k < 16; k++) {
ap = *cursor;
bp = *(cursor + 16);
j = 0;
while (j < 4) {
out = 0;
for (i = 0; i < 4; i++) {
#ifndef CURSOR_EB
out = (out << 2) | ((ap & 0x1) << 1) |
(bp & 0x1);
#else
out = ((out >> 2) & 0x3f) |
((ap & 0x1) << 7) |
((bp & 0x1) << 6);
#endif
ap >>= 1;
bp >>= 1;
}
bt459_set_cursor_ram(fi, pos, out);
pos++;
j++;
}
while (j < 16) {
bt459_set_cursor_ram(fi, pos, 0);
pos++;
j++;
}
cursor++;
}
while (pos < 1024) {
bt459_set_cursor_ram(fi, pos, 0);
pos++;
}
/* The cursor pattern is loaded, so turn on the hardware sprite. */
bt459_cursor_on((bt459_regmap_t *) fi->fi_vdac);
}
/*
* Set a cursor ram value.
*/
static void
bt459_set_cursor_ram(fi, pos, val)
int pos;
register u_char val;
struct fbinfo *fi;
{
register bt459_regmap_t *regs;
register int cnt;
u_char nval;
regs = (bt459_regmap_t *)(fi -> fi_vdac);
cnt = 0;
do {
bt459_write_reg(regs, BT459_REG_CRAM_BASE + pos, val);
nval = bt459_read_reg(regs, BT459_REG_CRAM_BASE + pos);
} while (val != nval && ++cnt < 10);
}
/* Set the cursor color from the saved state. */
void
bt459RestoreCursorColor(fi)
struct fbinfo *fi;
{
bt459_regmap_t *regs;
register int i;
regs = (bt459_regmap_t *)(fi -> fi_vdac);
bt459_select_reg(regs, BT459_REG_CCOLOR_1);
for (i = 0; i < 3; i++) {
regs->addr_reg = cursor_RGB[i];
wbflush();
}
bt459_select_reg(regs, BT459_REG_CCOLOR_3);
for (i = 3; i < 6; i++) {
regs->addr_reg = cursor_RGB[i];
wbflush();
}
}
/* Set the cursor color... */
void
bt459CursorColor(fi, color)
unsigned int color[];
struct fbinfo *fi;
{
register int i;
for (i = 0; i < 6; i++)
cursor_RGB[i] = (u_char)(color[i] >> 8);
bt459RestoreCursorColor(fi);
}
/* Move the hardware cursor to the specified position. */
void
bt459PosCursor(fi, x, y)
struct fbinfo *fi;
register int x, y;
{
bt459_regmap_t *regs;
struct fbuaccess *fbu = fi->fi_fbu;
regs = (bt459_regmap_t *)(fi -> fi_vdac);
#ifdef MELLON
if (y < 0)
y = 0;
else if (y > fi -> fi_type.fb_height - fi -> fi_cursor.height - 1)
y = fi -> fi_type.fb_height - fi -> fi_cursor.height - 1;
if (x < 0)
x = 0;
else if (x > fi -> fi_type.fb_width - fi -> fi_cursor.width - 1)
x = fi -> fi_type.fb_width - fi -> fi_cursor.width - 1;
#else /* old-style pmax glass tty */
if (y < fbu->scrInfo.min_cur_y || y > fbu->scrInfo.max_cur_y)
y = fbu->scrInfo.max_cur_y;
if (x < fbu->scrInfo.min_cur_x || x > fbu->scrInfo.max_cur_x)
x = fbu->scrInfo.max_cur_x;
#endif
fi -> fi_cursor.x = x;
fi -> fi_cursor.y = y;
fbu->scrInfo.cursor.x = x; /* keep track of real cursor */
fbu->scrInfo.cursor.y = y; /* position, indep. of mouse */
/* XXX is this a linear function of x-dimension screen size? */
if (fi->fi_type.fb_boardtype == PMAX_FBTYPE_SFB)
x += 369; /* is this correct for rcons on an sfb?? */
else
x += 219; /* correct for a cfb */
y += 34;
bt459_select_reg(regs, BT459_REG_CXLO);
regs->addr_reg = x;
wbflush();
regs->addr_reg = x >> 8;
wbflush();
regs->addr_reg = y;
wbflush();
regs->addr_reg = y >> 8;
wbflush();
}
/* Initialize the colormap to the default state, which is that entry
zero is black and all other entries are full white.
The hardware cursor is turned off. */
void
bt459InitColorMap(fi)
struct fbinfo *fi;
{
bt459_regmap_t *regs;
register int i;
regs = (bt459_regmap_t *)(fi -> fi_vdac);
bt459_select_reg(regs, 0);
((u_char *)(fi -> fi_cmap_bits)) [0] = regs->addr_cmap = 0;
wbflush();
((u_char *)(fi -> fi_cmap_bits)) [1] = regs->addr_cmap = 0;
wbflush();
((u_char *)(fi -> fi_cmap_bits)) [2] = regs->addr_cmap = 0;
wbflush();
for (i = 0; i < 256; i++) {
((u_char *)(fi -> fi_cmap_bits)) [i * 3]
= regs->addr_cmap = 0xff;
wbflush();
((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 1]
= regs->addr_cmap = 0xff;
wbflush();
((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 2]
= regs -> addr_cmap = 0xff;
wbflush();
}
for (i = 0; i < 3; i++) {
cursor_RGB[i] = 0x00;
cursor_RGB[i + 3] = 0xff;
}
bt459RestoreCursorColor(fi);
bt459_cursor_off(regs);
}
/* Load count entries of the colormap starting at index with the values
pointed to by bits. */
int
bt459LoadColorMap(fi, newbits, index, count)
struct fbinfo *fi;
caddr_t newbits;
int index, count;
{
bt459_regmap_t *regs;
u_char *cmap_bits;
u_char *cmap;
int i;
if (index > 256 || index < 0 || index + count > 256)
return EINVAL;
regs = (bt459_regmap_t *)(fi -> fi_vdac);
cmap_bits = (u_char *)newbits;
cmap = (u_char *)(fi -> fi_cmap_bits) + (index * 3);
bt459_select_reg(regs, index);
for (i = 0; i < count; i++) {
cmap[(i * 3) + 0] = regs->addr_cmap = cmap_bits [(i * 3) + 0];
cmap[(i * 3) + 1] = regs->addr_cmap = cmap_bits [(i * 3) + 1];
cmap[(i * 3) + 2] = regs->addr_cmap = cmap_bits [(i * 3) + 2];
} return 0;
}
/* Copy out count entries of the colormap starting at index into bits. */
int
bt459GetColorMap(fi, bits, index, count)
struct fbinfo *fi;
caddr_t bits;
int index, count;
{
u_char *cmap_bits;
u_char *cmap;
if (index > 256 || index < 0 || index + count > 256)
return EINVAL;
cmap_bits = (u_char *)bits;
cmap = (u_char *)(fi -> fi_cmap_bits) + index * 3;
bcopy (cmap, cmap_bits, count * 3);
return 0;
}
/* Enable the video display. */
int
bt459_video_on(fi)
struct fbinfo *fi;
{
bt459_regmap_t *regs;
u_char *cmap_bits;
if (!fi -> fi_blanked)
return 0;
/* XXX The cfb driver did this in the ioctl handler, but
Ted Lemon's sfb drifer didn't? */
bt459RestoreCursorColor(fi);
regs = (bt459_regmap_t *)(fi -> fi_vdac);
cmap_bits = (u_char *)fi -> fi_cmap_bits;
/* restore old color map entry zero */
bt459_select_reg(regs, 0);
regs->addr_cmap = cmap_bits [0];
wbflush();
regs->addr_cmap = cmap_bits [0];
wbflush();
regs->addr_cmap = cmap_bits [0];
wbflush();
/* enable normal display */
bt459_write_reg(regs, BT459_REG_PRM, 0xff);
bt459_cursor_on(regs);
fi -> fi_blanked = 0;
return 0;
}
/* Disable the video display. */
int
bt459_video_off(fi)
struct fbinfo *fi;
{
bt459_regmap_t *regs;
regs = (bt459_regmap_t *)(fi -> fi_vdac);
if (fi -> fi_blanked)
return 0;
/* set color map entry zero to zero */
bt459_select_reg(regs, 0);
regs->addr_cmap = 0;
wbflush();
regs->addr_cmap = 0;
wbflush();
regs->addr_cmap = 0;
wbflush();
/* disable display */
bt459_write_reg(regs, BT459_REG_PRM, 0);
bt459_cursor_off(regs);
fi -> fi_blanked = 1;
return 0;
}
/*
* Generic register access
*/
static void
bt459_select_reg(regs, regno)
bt459_regmap_t *regs;
{
regs->addr_lo = regno;
regs->addr_hi = regno >> 8;
wbflush();
}
static void
bt459_write_reg(regs, regno, val)
bt459_regmap_t *regs;
{
regs->addr_lo = regno;
regs->addr_hi = regno >> 8;
wbflush();
regs->addr_reg = val;
wbflush();
}
static u_char
bt459_read_reg(regs, regno)
bt459_regmap_t *regs;
{
regs->addr_lo = regno;
regs->addr_hi = regno >> 8;
wbflush();
return (regs->addr_reg);
}