596 lines
15 KiB
C
596 lines
15 KiB
C
/* $NetBSD: bt459.c,v 1.19 1999/12/09 00:16:14 simonb Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell and Rick Macklem.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)sfb.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* devGraphics.c --
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*
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* This file contains machine-dependent routines for the graphics device.
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*
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* Copyright (C) 1989 Digital Equipment Corporation.
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies.
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* Digital Equipment Corporation makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/devGraphics.c,
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* v 9.2 90/02/13 22:16:24 shirriff Exp SPRITE (DECWRL)";
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990,1989 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: bt459.c,v 1.19 1999/12/09 00:16:14 simonb Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h> /* wbflush() */
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#include <machine/pmioctl.h>
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#include <machine/fbio.h>
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#include <machine/fbvar.h>
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#include <pmax/dev/fbreg.h>
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#include <pmax/dev/bt459.h> /* chipset definitions */
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/*
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* Forward references.
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*/
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static void bt459_set_cursor_ram (struct fbinfo *, int, u_char);
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static void bt459_select_reg (bt459_regmap_t *, int);
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static void bt459_write_reg (bt459_regmap_t *, int, int);
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static u_char bt459_read_reg (bt459_regmap_t *, int);
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static __inline void bt459_cursor_on(bt459_regmap_t *);
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static __inline void bt459_cursor_off(bt459_regmap_t *);
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/*
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* Initialization
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*/
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int
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bt459init(fi)
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struct fbinfo *fi;
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{
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bt459_regmap_t *regs = (bt459_regmap_t *)(fi -> fi_vdac);
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u_char foo;
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foo = bt459_read_reg (regs, BT459_REG_ID);
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if (bt459_read_reg(regs, BT459_REG_ID) != 0x4a)
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return (0);
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#ifdef FOO /* @@@ DON'T KNOW HOW TO DO THIS @@@ */
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/* Reset the chip */
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*(volatile int *)(fi->fi_base + SFB_OFFSET_RESET) = 0;
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DELAY(2000); /* ???? check right time on specs! ???? */
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#endif /* FOO */
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/* use 4:1 input mux */
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bt459_write_reg(regs, BT459_REG_CMD0, 0x40);
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/* no zooming, no panning */
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bt459_write_reg(regs, BT459_REG_CMD1, 0x00);
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/*
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* signature test, X-windows cursor, no overlays, SYNC* PLL,
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* normal RAM select, 7.5 IRE pedestal, do sync
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*/
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/*XXX*/ /* FIXME */
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#if 0
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#ifndef PMAX
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/* whats this for then ?? */
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bt459_write_reg(regs, BT459_REG_CMD2, 0xc2);
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#else /* PMAX */
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bt459_write_reg(regs, BT459_REG_CMD2, 0xc0);
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#endif /* PMAX */
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#else
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bt459_write_reg(regs, BT459_REG_CMD2, 0xc0);
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#endif
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/* get all pixel bits */
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bt459_write_reg(regs, BT459_REG_PRM, 0xff);
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/* no blinking */
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bt459_write_reg(regs, BT459_REG_PBM, 0x00);
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/* no overlay */
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bt459_write_reg(regs, BT459_REG_ORM, 0x00);
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/* no overlay blink */
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bt459_write_reg(regs, BT459_REG_OBM, 0x00);
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/* no interleave, no underlay */
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bt459_write_reg(regs, BT459_REG_ILV, 0x00);
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/* normal operation, no signature analysis */
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bt459_write_reg(regs, BT459_REG_TEST, 0x00);
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/*
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* no blinking, 1bit cross hair, XOR reg&crosshair,
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* no crosshair on either plane 0 or 1,
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* regular cursor on both planes.
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*/
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bt459_cursor_on(regs);
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/* home cursor */
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bt459_write_reg(regs, BT459_REG_CXLO, 0x00);
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bt459_write_reg(regs, BT459_REG_CXHI, 0x00);
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bt459_write_reg(regs, BT459_REG_CYLO, 0x00);
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bt459_write_reg(regs, BT459_REG_CYHI, 0x00);
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/* no crosshair window */
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bt459_write_reg(regs, BT459_REG_WXLO, 0x00);
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bt459_write_reg(regs, BT459_REG_WXHI, 0x00);
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bt459_write_reg(regs, BT459_REG_WYLO, 0x00);
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bt459_write_reg(regs, BT459_REG_WYHI, 0x00);
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bt459_write_reg(regs, BT459_REG_WWLO, 0x00);
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bt459_write_reg(regs, BT459_REG_WWHI, 0x00);
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bt459_write_reg(regs, BT459_REG_WHLO, 0x00);
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bt459_write_reg(regs, BT459_REG_WHHI, 0x00);
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/* Initialize the cursor position... */
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fi -> fi_cursor.width = 64;
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fi -> fi_cursor.height = 64;
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fi -> fi_cursor.x = 0;
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fi -> fi_cursor.y = 0;
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/*
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* Initialize the color map and the screen.
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*/
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bt459InitColorMap(fi);
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return (1);
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}
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static u_char cursor_RGB[6]; /* cursor color 2 & 3 */
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/*
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* Enable the hardware cursor sprite.
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*/
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static __inline void
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bt459_cursor_on(btregs)
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bt459_regmap_t *btregs;
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{
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/*
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* no blinking, 1bit cross hair, XOR reg&crosshair,
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* no crosshair on either plane 0 or 1,
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* regular cursor on both planes.
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*/
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bt459_write_reg(btregs, BT459_REG_CCR, 0xc0);
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}
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/*
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* Disable the hardware cursor sprite.
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*/
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static __inline void
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bt459_cursor_off(btregs)
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bt459_regmap_t *btregs;
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{
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bt459_write_reg(btregs, BT459_REG_CCR, 0x00);
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}
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/*
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* XXX This assumes 2bits/cursor pixel so that the 1Kbyte cursor RAM
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* defines a 64x64 cursor. If the bt459 does not map the cursor RAM
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* this way, this code is Screwed!
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*/
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void
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bt459LoadCursor(fi, cursor)
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struct fbinfo *fi;
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u_short *cursor;
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{
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int i, j, k, pos;
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u_short ap, bp, out;
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/*
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* Fill in the cursor sprite using the A and B planes, as provided
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* for the pmax.
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* XXX This will have to change when the X server knows that this
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* is not a pmax display.
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*/
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pos = 0;
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for (k = 0; k < 16; k++) {
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ap = *cursor;
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bp = *(cursor + 16);
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j = 0;
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while (j < 4) {
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out = 0;
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for (i = 0; i < 4; i++) {
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#ifndef CURSOR_EB
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out = (out << 2) | ((ap & 0x1) << 1) |
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(bp & 0x1);
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#else
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out = ((out >> 2) & 0x3f) |
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((ap & 0x1) << 7) |
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((bp & 0x1) << 6);
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#endif
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ap >>= 1;
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bp >>= 1;
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}
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bt459_set_cursor_ram(fi, pos, out);
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pos++;
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j++;
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}
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while (j < 16) {
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bt459_set_cursor_ram(fi, pos, 0);
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pos++;
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j++;
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}
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cursor++;
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}
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while (pos < 1024) {
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bt459_set_cursor_ram(fi, pos, 0);
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pos++;
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}
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/* The cursor pattern is loaded, so turn on the hardware sprite. */
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bt459_cursor_on((bt459_regmap_t *) fi->fi_vdac);
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}
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/*
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* Set a cursor ram value.
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*/
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static void
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bt459_set_cursor_ram(fi, pos, val)
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int pos;
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u_char val;
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struct fbinfo *fi;
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{
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bt459_regmap_t *regs;
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int cnt;
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u_char nval;
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regs = (bt459_regmap_t *)(fi -> fi_vdac);
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cnt = 0;
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do {
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bt459_write_reg(regs, BT459_REG_CRAM_BASE + pos, val);
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nval = bt459_read_reg(regs, BT459_REG_CRAM_BASE + pos);
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} while (val != nval && ++cnt < 10);
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}
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/* Set the cursor color from the saved state. */
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void
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bt459RestoreCursorColor(fi)
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struct fbinfo *fi;
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{
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bt459_regmap_t *regs;
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int i;
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regs = (bt459_regmap_t *)(fi -> fi_vdac);
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bt459_select_reg(regs, BT459_REG_CCOLOR_1);
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for (i = 0; i < 3; i++) {
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regs->addr_reg = cursor_RGB[i];
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wbflush();
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}
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bt459_select_reg(regs, BT459_REG_CCOLOR_3);
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for (i = 3; i < 6; i++) {
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regs->addr_reg = cursor_RGB[i];
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wbflush();
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}
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}
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/* Set the cursor color... */
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void
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bt459CursorColor(fi, color)
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unsigned int color[];
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struct fbinfo *fi;
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{
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int i;
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for (i = 0; i < 6; i++)
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cursor_RGB[i] = (u_char)(color[i] >> 8);
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bt459RestoreCursorColor(fi);
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}
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/* Move the hardware cursor to the specified position. */
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void
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bt459PosCursor(fi, x, y)
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struct fbinfo *fi;
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int x, y;
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{
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bt459_regmap_t *regs;
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struct fbuaccess *fbu = fi->fi_fbu;
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regs = (bt459_regmap_t *)(fi -> fi_vdac);
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#ifdef MELLON
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if (y < 0)
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y = 0;
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else if (y > fi -> fi_type.fb_height - fi -> fi_cursor.height - 1)
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y = fi -> fi_type.fb_height - fi -> fi_cursor.height - 1;
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if (x < 0)
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x = 0;
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else if (x > fi -> fi_type.fb_width - fi -> fi_cursor.width - 1)
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x = fi -> fi_type.fb_width - fi -> fi_cursor.width - 1;
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#else /* old-style pmax glass tty */
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if (y < fbu->scrInfo.min_cur_y || y > fbu->scrInfo.max_cur_y)
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y = fbu->scrInfo.max_cur_y;
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if (x < fbu->scrInfo.min_cur_x || x > fbu->scrInfo.max_cur_x)
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x = fbu->scrInfo.max_cur_x;
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#endif
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fi -> fi_cursor.x = x;
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fi -> fi_cursor.y = y;
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fbu->scrInfo.cursor.x = x; /* keep track of real cursor */
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fbu->scrInfo.cursor.y = y; /* position, indep. of mouse */
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/* XXX is this a linear function of x-dimension screen size? */
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if (fi->fi_type.fb_boardtype == PMAX_FBTYPE_SFB) {
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x += fi->fi_type.fb_width == 1280 ? 368 : 220;
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y += fi->fi_type.fb_height == 1024 ? 38 : 35;
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} else {
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x += 219; /* correct for a cfb */
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y += 34;
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}
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bt459_select_reg(regs, BT459_REG_CXLO);
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regs->addr_reg = x;
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wbflush();
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regs->addr_reg = x >> 8;
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wbflush();
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regs->addr_reg = y;
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wbflush();
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regs->addr_reg = y >> 8;
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wbflush();
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}
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/* Initialize the colormap to the default state, which is that entry
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zero is black and all other entries are full white.
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The hardware cursor is turned off. */
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void
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bt459InitColorMap(fi)
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struct fbinfo *fi;
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{
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bt459_regmap_t *regs;
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int i;
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regs = (bt459_regmap_t *)(fi -> fi_vdac);
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bt459_select_reg(regs, 0);
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((u_char *)(fi -> fi_cmap_bits)) [0] = regs->addr_cmap = 0;
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wbflush();
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((u_char *)(fi -> fi_cmap_bits)) [1] = regs->addr_cmap = 0;
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wbflush();
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((u_char *)(fi -> fi_cmap_bits)) [2] = regs->addr_cmap = 0;
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wbflush();
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for (i = 0; i < 256; i++) {
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((u_char *)(fi -> fi_cmap_bits)) [i * 3]
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= regs->addr_cmap = 0xff;
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wbflush();
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((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 1]
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= regs->addr_cmap = 0xff;
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wbflush();
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((u_char *)(fi -> fi_cmap_bits)) [i * 3 + 2]
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= regs -> addr_cmap = 0xff;
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wbflush();
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}
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for (i = 0; i < 3; i++) {
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cursor_RGB[i] = 0x00;
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cursor_RGB[i + 3] = 0xff;
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}
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bt459RestoreCursorColor(fi);
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bt459_cursor_off(regs);
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}
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/* Load count entries of the colormap starting at index with the values
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pointed to by bits. */
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int
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bt459LoadColorMap(fi, newbits, index, count)
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struct fbinfo *fi;
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const u_char *newbits;
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int index, count;
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{
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bt459_regmap_t *regs;
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u_char *cmap_bits;
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u_char *cmap;
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int i;
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if (index > 256 || index < 0 || index + count > 256)
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return EINVAL;
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regs = (bt459_regmap_t *)(fi -> fi_vdac);
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cmap_bits = (u_char *)newbits;
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cmap = (u_char *)(fi -> fi_cmap_bits) + (index * 3);
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bt459_select_reg(regs, index);
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for (i = 0; i < count; i++) {
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cmap[(i * 3) + 0] = regs->addr_cmap = cmap_bits [(i * 3) + 0];
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cmap[(i * 3) + 1] = regs->addr_cmap = cmap_bits [(i * 3) + 1];
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cmap[(i * 3) + 2] = regs->addr_cmap = cmap_bits [(i * 3) + 2];
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} return 0;
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}
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/* Copy out count entries of the colormap starting at index into bits. */
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int
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bt459GetColorMap(fi, bits, index, count)
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struct fbinfo *fi;
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u_char *bits;
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int index, count;
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{
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u_char *cmap_bits;
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u_char *cmap;
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if (index > 256 || index < 0 || index + count > 256)
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return EINVAL;
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cmap_bits = (u_char *)bits;
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cmap = (u_char *)(fi -> fi_cmap_bits) + index * 3;
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bcopy (cmap, cmap_bits, count * 3);
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return 0;
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}
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/* Enable the video display. */
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int
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bt459_video_on(fi)
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struct fbinfo *fi;
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{
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bt459_regmap_t *regs;
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|
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);
|
|
}
|
|
|