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

355 lines
10 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.
*
* %W% (Berkeley) %G%
*
* from: Header: cgthree.c,v 1.8 93/10/31 05:09:24 torek Exp
* $Id: cgthree.c,v 1.3 1993/11/11 03:36:55 deraadt Exp $
*/
/*
* color display (cgthree) driver.
*
* Does not handle interrupts, even though they can occur.
*
* XXX should defer colormap updates to vertical retrace interrupts
*/
#include <sys/param.h>
#include <sys/buf.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/btreg.h>
#include <sparc/sbus/btvar.h>
#include <sparc/sbus/cgthreereg.h>
#include <sparc/sbus/sbusvar.h>
/* per-display variables */
struct cgthree_softc {
struct device sc_dev; /* base device */
struct sbusdev sc_sd; /* sbus device */
struct fbdevice sc_fb; /* frame buffer device */
volatile struct bt_regs *sc_bt; /* Brooktree registers */
caddr_t sc_phys; /* display RAM (phys addr) */
int sc_blanked; /* true if blanked */
union bt_cmap sc_cmap; /* Brooktree color map */
};
/* autoconfiguration driver */
static void cgthreeattach(struct device *, struct device *, void *);
struct cfdriver cgthreecd =
{ NULL, "cgthree", matchbyname, cgthreeattach,
DV_DULL, sizeof(struct cgthree_softc) };
/* frame buffer generic driver */
static void cgthreeunblank(struct device *);
static struct fbdriver cgthreefbdriver = { cgthreeunblank };
extern int fbnode;
extern struct tty *fbconstty;
extern int (*v_putc)();
extern int nullop();
static int cgthree_cnputc();
static void cgthreeloadcmap __P((struct cgthree_softc *, int, int));
#define CGTHREE_MAJOR 55 /* XXX */
/*
* Attach a display. We need to notice if it is the console, too.
*/
void
cgthreeattach(parent, self, args)
struct device *parent, *self;
void *args;
{
register struct cgthree_softc *sc = (struct cgthree_softc *)self;
register struct sbus_attach_args *sa = args;
register int node = sa->sa_ra.ra_node, ramsize, i;
register volatile struct bt_regs *bt;
register struct cgthree_all *p;
int isconsole;
sc->sc_fb.fb_major = CGTHREE_MAJOR; /* XXX to be removed */
sc->sc_fb.fb_driver = &cgthreefbdriver;
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_SUN3COLOR;
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", 1152);
ramsize = sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes;
sc->sc_fb.fb_type.fb_depth = 8;
sc->sc_fb.fb_type.fb_cmsize = 256;
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 cgthree 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 cgthree_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_bt = bt = (volatile struct bt_regs *)
mapiodev((caddr_t)&p->ba_btreg, sizeof(p->ba_btreg));
sc->sc_phys = p->ba_ram;
/* grab initial (current) color map */
bt->bt_addr = 0;
for (i = 0; i < 256 * 3 / 4; i++)
sc->sc_cmap.cm_chip[i] = bt->bt_cmap;
/* make sure we are not blanked (see cgthreeunblank) */
bt->bt_addr = 0x06; /* command reg */
bt->bt_ctrl = 0x73; /* overlay plane */
bt->bt_addr = 0x04; /* read mask */
bt->bt_ctrl = 0xff; /* color planes */
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
cgthreeopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit = minor(dev);
if (unit >= cgthreecd.cd_ndevs || cgthreecd.cd_devs[unit] == NULL)
return (ENXIO);
return (0);
}
int
cgthreeclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return (0);
}
int
cgthreeioctl(dev, cmd, data, flags, p)
dev_t dev;
int cmd;
register caddr_t data;
int flags;
struct proc *p;
{
register struct cgthree_softc *sc = cgthreecd.cd_devs[minor(dev)];
register struct fbgattr *fba;
int error;
switch (cmd) {
case FBIOGTYPE:
*(struct fbtype *)data = sc->sc_fb.fb_type;
break;
case FBIOGATTR:
fba = (struct fbgattr *)data;
fba->real_type = sc->sc_fb.fb_type.fb_type;
fba->owner = 0; /* XXX ??? */
fba->fbtype = sc->sc_fb.fb_type;
fba->sattr.flags = 0;
fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
fba->sattr.dev_specific[0] = -1;
fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
fba->emu_types[1] = -1;
break;
case FBIOGETCMAP:
return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256));
case FBIOPUTCMAP:
/* copy to software map */
#define p ((struct fbcmap *)data)
error = bt_putcmap(p, &sc->sc_cmap, 256);
if (error)
return (error);
/* now blast them into the chip */
/* XXX should use retrace interrupt */
cgthreeloadcmap(sc, p->index, p->count);
#undef p
break;
case FBIOGVIDEO:
*(int *)data = sc->sc_blanked;
break;
case FBIOSVIDEO:
if (*(int *)data)
cgthreeunblank(&sc->sc_dev);
else if (!sc->sc_blanked) {
register volatile struct bt_regs *bt;
bt = sc->sc_bt;
bt->bt_addr = 0x06; /* command reg */
bt->bt_ctrl = 0x70; /* overlay plane */
bt->bt_addr = 0x04; /* read mask */
bt->bt_ctrl = 0x00; /* color planes */
/*
* Set color 0 to black -- note that this overwrites
* R of color 1.
*/
bt->bt_addr = 0;
bt->bt_cmap = 0;
sc->sc_blanked = 1;
}
break;
default:
return (ENOTTY);
}
return (0);
}
/*
* Undo the effect of an FBIOSVIDEO that turns the video off.
*/
static void
cgthreeunblank(dev)
struct device *dev;
{
struct cgthree_softc *sc = (struct cgthree_softc *)dev;
register volatile struct bt_regs *bt;
if (sc->sc_blanked) {
sc->sc_blanked = 0;
bt = sc->sc_bt;
/* restore color 0 (and R of color 1) */
bt->bt_addr = 0;
bt->bt_cmap = sc->sc_cmap.cm_chip[0];
/* restore read mask */
bt->bt_addr = 0x06; /* command reg */
bt->bt_ctrl = 0x73; /* overlay plane */
bt->bt_addr = 0x04; /* read mask */
bt->bt_ctrl = 0xff; /* color planes */
}
}
/*
* Load a subset of the current (new) colormap into the Brooktree DAC.
*/
static void
cgthreeloadcmap(sc, start, ncolors)
register struct cgthree_softc *sc;
register int start, ncolors;
{
register volatile struct bt_regs *bt;
register u_int *ip;
register int count;
ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
bt = sc->sc_bt;
bt->bt_addr = BT_D4M4(start);
while (--count >= 0)
bt->bt_cmap = *ip++;
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*
* The cg3 is mapped starting at 256KB, for pseudo-compatibility with
* the cg4 (which had an overlay plane in the first 128K and an enable
* plane in the next 128K). X11 uses only 256k+ region but tries to
* map the whole thing, so we repeatedly map the first 256K to the
* first page of the color screen. If someone tries to use the overlay
* and enable regions, they will get a surprise....
*/
int
cgthreemap(dev, off, prot)
dev_t dev;
int off, prot;
{
register struct cgthree_softc *sc = cgthreecd.cd_devs[minor(dev)];
#define START (128*1024 + 128*1024)
if (off & PGOFSET)
panic("cgthreemap");
if ((unsigned)off < START)
off = 0;
else
off -= START;
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);
}