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

371 lines
10 KiB
C

/* $NetBSD: cfb.c,v 1.26 1997/06/30 22:08:58 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 "fb.h"
#include "cfb.h"
#if NCFB > 0
#include <sys/param.h>
#include <sys/systm.h> /* printf() */
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <dev/tc/tcvar.h>
#include <mips/cpuregs.h> /* mips cached->uncached */
#include <machine/pmioctl.h>
#include <machine/fbio.h>
#include <machine/fbvar.h>
#include <pmax/dev/cfbvar.h> /* XXX dev/tc ? */
#include <pmax/pmax/pmaxtype.h>
#include <pmax/dev/bt459.h>
#include <pmax/dev/fbreg.h>
#include <machine/autoconf.h>
#define PMAX /* enable /dev/pm compatibility */
/*
* These need to be mapped into user space.
*/
struct fbuaccess cfbu;
struct pmax_fbtty cfbfb;
struct fbinfo cfbfi; /*XXX*/ /* should be softc */
/*
* Forward references.
*/
extern struct cfdriver cfb_cd;
#define CMAP_BITS (3 * 256) /* 256 entries, 3 bytes per. */
static u_char cmap_bits [CMAP_BITS]; /* colormap for console... */
/*
* Method table for standard framebuffer operations on a CFB.
* The CFB uses a Brooktree bt479 ramdac.
*/
struct fbdriver cfb_driver = {
bt459_video_on,
bt459_video_off,
bt459InitColorMap,
bt459GetColorMap,
bt459LoadColorMap,
bt459PosCursor,
bt459LoadCursor,
bt459CursorColor
};
int cfbinit __P((struct fbinfo *fi, caddr_t cfbaddr, int unit, int silent));
extern void fbScreenInit __P((struct fbinfo *fi));
extern int pmax_boardtype;
#define CFB_OFFSET_VRAM 0x0 /* from module's base */
#define CFB_OFFSET_BT459 0x200000 /* Bt459 registers */
#define CFB_OFFSET_IREQ 0x300000 /* Interrupt req. control */
#define CFB_OFFSET_ROM 0x380000 /* Diagnostic ROM */
#define CFB_OFFSET_RESET 0x3c0000 /* Bt459 resets on writes */
#define CFB_FB_SIZE 0x100000 /* frame buffer size */
/*
* Autoconfiguration data for config.new.
* Use static-sized softc until config.old and old autoconfig
* code is completely gone.
*/
int cfbmatch __P((struct device *, void *, void *));
void cfbattach __P((struct device *, struct device *, void *));
int cfb_intr __P((void *sc));
struct cfattach cfb_ca = {
sizeof(struct fbinfo), cfbmatch, cfbattach
};
struct cfdriver cfb_cd = {
NULL, "cfb", DV_DULL
};
int
cfbmatch(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
/*struct cfdata *cf = match;*/
struct tc_attach_args *ta = aux;
#ifdef FBDRIVER_DOES_ATTACH
/* leave configuration to the fb driver */
return 0;
#endif
/* make sure that we're looking for this type of device. */
if (!TC_BUS_MATCHNAME(ta, "PMAG-BA "))
return (0);
return (1);
}
/*
* Attach a device. Hand off all the work to cfbinit(),
* so console-config code can attach cfb devices very early in boot,
* to use as system console.
*/
void
cfbattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct tc_attach_args *ta = aux;
caddr_t base = (caddr_t)(ta->ta_addr);
int unit = self->dv_unit;
struct fbinfo *fi = (struct fbinfo *) self;
#ifdef notyet
/* if this is the console, it's already configured. */
if (ca->ca_slotpri == cons_slot)
return; /* XXX patch up softc pointer */
#endif
if (!cfbinit(fi, base, unit, 0))
return;
/*
* 3MIN does not mask un-established TC option interrupts,
* so establish a handler.
* XXX Should store cmap updates in softc and apply in the
* interrupt handler, which interrupts during vertical-retrace.
*/
tc_intr_establish(parent, ta->ta_cookie, TC_IPL_NONE, cfb_intr, fi);
printf("\n");
}
/*
* CFB initialization. This is divorced from cfbattch() so that
* a console framebuffer can be initialized early during boot.
*/
int
cfbinit(fi, cfbaddr, unit, silent)
struct fbinfo *fi;
caddr_t cfbaddr;
int unit;
int silent;
{
/*
* If this device is being intialized as the console, malloc()
* is not yet up and we must use statically-allocated space.
*/
if (fi == NULL) {
fi = &cfbfi; /* XXX */
fi->fi_cmap_bits = (caddr_t)cmap_bits;
}
else {
fi->fi_cmap_bits = malloc(CMAP_BITS, M_DEVBUF, M_NOWAIT);
if (fi->fi_cmap_bits == NULL) {
printf("cfb%d: no memory for cmap\n", unit);
return (0);
}
}
/* check for no frame buffer */
if (badaddr(cfbaddr, 4)) {
printf("cfb: bad address 0x%p\n", cfbaddr);
return (0);
}
/* XXX fi should be a pointer to a field in the softc */
/* Fill in main frame buffer info struct. */
fi->fi_unit = unit;
fi->fi_pixels = (caddr_t)(cfbaddr + CFB_OFFSET_VRAM);
fi->fi_pixelsize = 1024 * 864;
fi->fi_base = (caddr_t)(cfbaddr + CFB_OFFSET_VRAM);
fi->fi_vdac = (caddr_t)(cfbaddr + CFB_OFFSET_BT459);
fi->fi_size = (fi->fi_pixels + CFB_FB_SIZE) - fi->fi_base;
fi->fi_linebytes = 1024;
fi->fi_driver = &cfb_driver;
fi->fi_blanked = 0;
/* Fill in Frame Buffer Type struct. */
fi->fi_type.fb_boardtype = PMAX_FBTYPE_CFB;
fi->fi_type.fb_width = 1024;
fi->fi_type.fb_height = 864;
fi->fi_type.fb_depth = 8;
fi->fi_type.fb_cmsize = 256;
fi->fi_type.fb_size = CFB_FB_SIZE;
/*
* Reset the chip. (Initializes colormap for us as a
* "helpful" side-effect.)
*/
if (!bt459init(fi)) {
printf("cfb%d: vdac init failed.\n", unit);
return (0);
}
/*cfbInitColorMap();*/ /* done by bt459init() */
/*
* qvss/pm-style mmap()ed event queue compatibility glue
*/
/*
* Must be in Uncached space since the fbuaccess structure is
* mapped into the user's address space uncached.
*/
fi->fi_fbu = (struct fbuaccess *)
MIPS_PHYS_TO_KSEG1(MIPS_KSEG0_TO_PHYS(&cfbu));
/* This is glass-tty state but it's in the shared structure. Ick. */
fi->fi_fbu->scrInfo.max_row = 56;
fi->fi_fbu->scrInfo.max_col = 80;
init_pmaxfbu(fi);
/*
* Initialize old-style pmax glass-tty screen info.
*/
fi->fi_glasstty = &cfbfb;
/*
* Initialize the color map, the screen, and the mouse.
*/
if (tb_kbdmouseconfig(fi)) {
printf(" (mouse/keyboard config failed)");
return (0);
}
/*
* Connect to the raster-console pseudo-driver
*/
fbconnect("PMAG-BA", fi, silent);
#ifdef fpinitialized
fp->initialized = 1;
#endif
return (1);
}
/*
* The original TURBOChannel cfb interrupts on every vertical
* retrace, and we can't disable the board from requesting those
* interrupts. The 4.4BSD kernel never enabled those interrupts;
* but there's a kernel design bug on the 3MIN, where disabling
* (or enabling) TC option interrupts has no effect the interrupts
* are mapped to R3000 interrupts and always seem to be taken.
* This function simply dismisses CFB interrupts, or the interrupt
* request from the card will still be active.
*/
int
cfb_intr(sc)
void *sc;
{
struct fbinfo *fi = (struct fbinfo *)sc;
char *slot_addr = (((char *)fi->fi_base) - CFB_OFFSET_VRAM);
/* reset vertical-retrace interrupt by writing a dont-care */
*(int*) (slot_addr+CFB_OFFSET_IREQ) = 0;
return (0);
}
#endif /* NCFB */