NetBSD/sys/arch/sparc/dev/bwtwo.c

249 lines
7.1 KiB
C

/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory.
*
* 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.
*
* @(#)bwtwo.c 8.1 (Berkeley) 6/11/93
*
* from: Header: bwtwo.c,v 1.14 92/11/26 02:28:04 torek Exp
* $Id: bwtwo.c,v 1.2 1993/10/11 02:45:49 deraadt Exp $
*/
/*
* black&white display (bwtwo) driver.
*
* Does not handle interrupts, even though they can occur.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>
#include <machine/fbio.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/fbvar.h>
#include <sparc/sbus/bwtworeg.h>
#include <sparc/sbus/sbusvar.h>
/* per-display variables */
struct bwtwo_softc {
struct device sc_dev; /* base device */
struct sbusdev sc_sd; /* sbus device */
struct fbdevice sc_fb; /* frame buffer device */
volatile struct bwtworeg *sc_reg;/* control registers */
caddr_t sc_phys; /* display RAM (phys addr) */
};
/* autoconfiguration driver */
static void bwtwoattach(struct device *, struct device *, void *);
struct cfdriver bwtwocd =
{ NULL, "bwtwo", matchbyname, bwtwoattach,
DV_DULL, sizeof(struct bwtwo_softc) };
/* XXX we do not handle frame buffer interrupts (do not know how) */
/* frame buffer generic driver */
static void bwtwounblank(struct device *);
static struct fbdriver bwtwofbdriver = { bwtwounblank };
extern int fbnode;
extern struct tty *fbconstty;
extern int (*v_putc)();
extern int nullop();
static int bwtwo_cnputc();
static struct bwtwo_softc *bwcons;
#define BWTWO_MAJOR 27 /* XXX */
/*
* Attach a display. We need to notice if it is the console, too.
*/
void
bwtwoattach(parent, self, args)
struct device *parent, *self;
void *args;
{
register struct bwtwo_softc *sc = (struct bwtwo_softc *)self;
register struct sbus_attach_args *sa = args;
register int node = sa->sa_ra.ra_node, ramsize;
register struct bwtwo_all *p;
int isconsole;
sc->sc_fb.fb_major = BWTWO_MAJOR; /* XXX to be removed */
sc->sc_fb.fb_driver = &bwtwofbdriver;
sc->sc_fb.fb_device = &sc->sc_dev;
/*
* The defaults below match my screen, but are not guaranteed
* to be correct as defaults go...
*/
sc->sc_fb.fb_type.fb_type = FBTYPE_SUN2BW;
sc->sc_fb.fb_type.fb_width = getpropint(node, "width", 1152);
sc->sc_fb.fb_type.fb_height = getpropint(node, "height", 900);
sc->sc_fb.fb_linebytes = getpropint(node, "linebytes", 144);
ramsize = sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes;
sc->sc_fb.fb_type.fb_depth = 1;
sc->sc_fb.fb_type.fb_cmsize = 0;
sc->sc_fb.fb_type.fb_size = ramsize;
printf(": %s, %d x %d", getpropstring(node, "model"),
sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height);
/*
* When the ROM has mapped in a bwtwo display, the address
* maps only the video RAM, so in any case we have to map the
* registers ourselves. We only need the video RAM if we are
* going to print characters via rconsole.
*/
isconsole = node == fbnode && fbconstty != NULL;
p = (struct bwtwo_all *)sa->sa_ra.ra_paddr;
if ((sc->sc_fb.fb_pixels = sa->sa_ra.ra_vaddr) == NULL && isconsole) {
/* this probably cannot happen, but what the heck */
sc->sc_fb.fb_pixels = mapiodev(p->ba_ram, ramsize);
}
sc->sc_reg = (volatile struct bwtworeg *)
mapiodev((caddr_t)&p->ba_reg, sizeof(p->ba_reg));
sc->sc_phys = p->ba_ram;
/* Insure video is enabled */
sc->sc_reg->bw_ctl |= CTL_VE;
if (isconsole) {
printf(" (console)\n");
#ifdef RCONSOLE
rcons_init(&sc->sc_fb);
#endif
} else
printf("\n");
sbus_establish(&sc->sc_sd, &sc->sc_dev);
if (node == fbnode)
fb_attach(&sc->sc_fb);
}
int
bwtwoopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit = minor(dev);
if (unit >= bwtwocd.cd_ndevs || bwtwocd.cd_devs[unit] == NULL)
return (ENXIO);
return (0);
}
int
bwtwoclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return (0);
}
int
bwtwoioctl(dev, cmd, data, flags, p)
dev_t dev;
int cmd;
caddr_t data;
int flags;
struct proc *p;
{
struct bwtwo_softc *sc = bwtwocd.cd_devs[minor(dev)];
switch (cmd) {
case FBIOGTYPE:
*(struct fbtype *)data = sc->sc_fb.fb_type;
break;
case FBIOGVIDEO:
*(int *)data = (sc->sc_reg->bw_ctl & CTL_VE) != 0;
break;
case FBIOSVIDEO:
if (*(int *)data)
sc->sc_reg->bw_ctl |= CTL_VE;
else
sc->sc_reg->bw_ctl &= ~CTL_VE;
break;
default:
return (ENOTTY);
}
return (0);
}
static void
bwtwounblank(dev)
struct device *dev;
{
struct bwtwo_softc *sc = (struct bwtwo_softc *)dev;
sc->sc_reg->bw_ctl |= CTL_VE;
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*/
int
bwtwomap(dev, off, prot)
dev_t dev;
int off, prot;
{
register struct bwtwo_softc *sc = bwtwocd.cd_devs[minor(dev)];
if (off & PGOFSET)
panic("bwtwomap");
if ((unsigned)off >= sc->sc_fb.fb_type.fb_size)
return (-1);
/*
* I turned on PMAP_NC here to disable the cache as I was
* getting horribly broken behaviour with it on.
*/
return ((int)sc->sc_phys + off + PMAP_OBIO + PMAP_NC);
}