NetBSD/sys/arch/sparc/dev/bwtwo.c
thorpej edf9d66f32 First-cut support for P4 framebuffers. Currently supports P4 variants
of bwtwo, cgfour, cgsix, and cgeight.  Includes support for attaching
the overlay plane of the cgfour and cgeight as a bwtwo instance (a'la
SunOS).

P4 register descriptions, cgfour driver, and cgeight driver partially
derived from OpenBSD.

This code may still need polishing.
1996-02-27 22:09:14 +00:00

511 lines
12 KiB
C

/* $NetBSD: bwtwo.c,v 1.22 1996/02/27 22:09:23 thorpej Exp $ */
/*
* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
* 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
*/
/*
* black&white display (bwtwo) driver.
*
* Does not handle interrupts, even though they can occur.
*
* P4 and overlay plane support by Jason R. Thorpe <thorpej@NetBSD.ORG>.
* Overlay plane handling hints and ideas provided by Brad Spencer.
*/
#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 <vm/vm.h>
#include <machine/fbio.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/fbvar.h>
#include <machine/eeprom.h>
#include <machine/ctlreg.h>
#include <sparc/sparc/asm.h>
#include <sparc/dev/btreg.h>
#include <sparc/dev/bwtworeg.h>
#include <sparc/dev/sbusvar.h>
#if defined(SUN4)
#include <sparc/dev/pfourreg.h>
#endif
/* 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 fbcontrol *sc_reg;/* control registers */
struct rom_reg sc_phys; /* phys address description */
int sc_bustype; /* type of bus we live on */
int sc_pixeloffset; /* offset to framebuffer */
#if defined(SUN4)
/*
* Additional overlay plane goo.
*/
int sc_ovtype; /* what kind of color fb? */
#define BWO_NONE 0x00
#define BWO_CGFOUR 0x01
#define BWO_CGEIGHT 0x02
#endif
};
/* autoconfiguration driver */
static void bwtwoattach __P((struct device *, struct device *, void *));
static int bwtwomatch __P((struct device *, void *, void *));
int bwtwoopen __P((dev_t, int, int, struct proc *));
int bwtwoclose __P((dev_t, int, int, struct proc *));
int bwtwoioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
int bwtwommap __P((dev_t, int, int));
static void bwtwounblank __P((struct device *));
static void bwtwo_set_video __P((struct bwtwo_softc *, int));
static int bwtwo_get_video __P((struct bwtwo_softc *));
struct cfdriver bwtwocd =
{ NULL, "bwtwo", bwtwomatch, bwtwoattach,
DV_DULL, sizeof(struct bwtwo_softc) };
/* XXX we do not handle frame buffer interrupts (do not know how) */
/* frame buffer generic driver */
static struct fbdriver bwtwofbdriver = {
bwtwounblank, bwtwoopen, bwtwoclose, bwtwoioctl, bwtwommap
};
extern int fbnode;
extern struct tty *fbconstty;
extern int (*v_putc)();
extern int nullop();
static int bwtwo_cnputc();
static struct bwtwo_softc *bwcons;
/*
* Match a bwtwo.
*/
int
bwtwomatch(parent, vcf, aux)
struct device *parent;
void *vcf, *aux;
{
struct cfdata *cf = vcf;
struct confargs *ca = aux;
struct romaux *ra = &ca->ca_ra;
if (CPU_ISSUN4 && cf->cf_unit != 0)
return (0);
if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
return (0);
/*
* Mask out invalid flags from the user.
*/
cf->cf_flags &= FB_USERMASK;
if (ca->ca_bustype == BUS_SBUS)
return(1);
/*
* Make sure there's hardware there.
*/
if (probeget(ra->ra_vaddr, 4) == -1)
return (0);
#if defined(SUN4)
if (CPU_ISSUN4 && (ca->ca_bustype == BUS_OBIO)) {
/*
* Check for a pfour framebuffer.
*/
switch (fb_pfour_id(ra->ra_vaddr)) {
case PFOUR_ID_BW:
case PFOUR_ID_COLOR8P1: /* bwtwo in ... */
case PFOUR_ID_COLOR24: /* ...overlay plane */
cf->cf_flags |= FB_PFOUR;
/* FALLTHROUGH */
case PFOUR_NOTPFOUR:
return (1);
default:
return (0);
}
}
#endif
return (0);
}
/*
* 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 confargs *ca = args;
register int node = ca->ca_ra.ra_node, ramsize;
struct fbdevice *fb = &sc->sc_fb;
int isconsole;
int sbus = 1;
char *nam;
fb->fb_driver = &bwtwofbdriver;
fb->fb_device = &sc->sc_dev;
fb->fb_type.fb_type = FBTYPE_SUN2BW;
fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags;
/*
* Map the control register.
*/
if (fb->fb_flags & FB_PFOUR) {
fb->fb_pfour =
(volatile u_int32_t *)mapiodev(ca->ca_ra.ra_reg, 0,
sizeof(u_int32_t), ca->ca_bustype);
sc->sc_reg = NULL;
} else {
sc->sc_reg =
(volatile struct fbcontrol *)mapiodev(ca->ca_ra.ra_reg,
BWREG_REG, sizeof(struct fbcontrol), ca->ca_bustype);
fb->fb_pfour = NULL;
}
/* Set up default pixel offset. May be changed below. */
sc->sc_pixeloffset = BWREG_MEM;
switch (ca->ca_bustype) {
case BUS_OBIO:
if (CPU_ISSUN4M) /* 4m has framebuffer on obio */
goto obp_name;
sbus = node = 0;
#if defined(SUN4)
if (fb->fb_flags & FB_PFOUR) {
nam = "bwtwo/p4";
/*
* Notice if this is an overlay plane on a color
* framebuffer. Note that PFOUR_COLOR_OFF_OVERLAY
* is the same as PFOUR_BW_OFF, but we use the
* different names anyway.
*/
switch (PFOUR_ID(*fb->fb_pfour)) {
case PFOUR_ID_COLOR8P1:
sc->sc_ovtype = BWO_CGFOUR;
sc->sc_pixeloffset = PFOUR_COLOR_OFF_OVERLAY;
break;
case PFOUR_ID_COLOR24:
sc->sc_ovtype = BWO_CGEIGHT;
sc->sc_pixeloffset = PFOUR_COLOR_OFF_OVERLAY;
break;
default:
sc->sc_ovtype = BWO_NONE;
sc->sc_pixeloffset = PFOUR_BW_OFF;
break;
}
} else
#endif
nam = "bwtwo";
break;
case BUS_VME32:
case BUS_VME16:
sbus = node = 0;
nam = "bwtwo";
break;
case BUS_SBUS:
obp_name:
#if defined(SUN4C) || defined(SUN4M)
nam = getpropstring(node, "model");
#endif
break;
}
sc->sc_phys = ca->ca_ra.ra_reg[0];
sc->sc_bustype = ca->ca_bustype;
fb->fb_type.fb_depth = 1;
fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype);
ramsize = fb->fb_type.fb_height * fb->fb_linebytes;
fb->fb_type.fb_cmsize = 0;
fb->fb_type.fb_size = ramsize;
printf(": %s, %d x %d", nam,
fb->fb_type.fb_width, fb->fb_type.fb_height);
#if defined(SUN4)
if (CPU_ISSUN4) {
struct eeprom *eep = (struct eeprom *)eeprom_va;
int constype = (fb->fb_flags & FB_PFOUR) ? EE_CONS_P4OPT :
EE_CONS_BW;
/*
* Assume this is the console if there's no eeprom info
* to be found.
*/
if (eep == NULL || eep->eeConsole == constype)
isconsole = (fbconstty != NULL);
else
isconsole = 0;
}
#endif
if (CPU_ISSUN4COR4M)
isconsole = node == fbnode && fbconstty != NULL;
/*
* When the ROM has mapped in a bwtwo display, the address
* maps only the video RAM, hence we always map the control
* registers ourselves. We only need the video RAM if we are
* going to print characters via rconsole.
*/
if ((fb->fb_pixels = ca->ca_ra.ra_vaddr) == NULL && isconsole) {
/* this probably cannot happen (on sun4c), but what the heck */
fb->fb_pixels =
mapiodev(ca->ca_ra.ra_reg, sc->sc_pixeloffset,
ramsize, ca->ca_bustype);
}
/* Insure video is enabled */
bwtwo_set_video(sc, 1);
if (isconsole) {
printf(" (console)\n");
#ifdef RASTERCONSOLE
fbrcons_init(fb);
#endif
} else
printf("\n");
#if defined(SUN4C) || defined(SUN4M)
if (sbus)
sbus_establish(&sc->sc_sd, &sc->sc_dev);
#endif
#if defined(SUN4)
if ((fb->fb_flags & FB_PFOUR) && (sc->sc_ovtype != BWO_NONE)) {
char *ovnam;
switch (sc->sc_ovtype) {
case BWO_CGFOUR:
ovnam = "cgfour";
break;
case BWO_CGEIGHT:
ovnam = "cgeight";
break;
default:
ovnam = "unknown";
break;
}
printf("%s: %s overlay plane\n", sc->sc_dev.dv_xname, ovnam);
}
#endif
if (CPU_ISSUN4 || node == fbnode) {
#if defined(SUN4)
/*
* If we're on an overlay plane of a color framebuffer,
* then we don't force the issue in fb_attach() because
* we'd like the color framebuffer to actually be the
* "console framebuffer". We're only around to speed
* up rconsole.
*/
if ((fb->fb_flags & FB_PFOUR) && (sc->sc_ovtype != BWO_NONE ))
fb_attach(fb, 0);
else
#endif
fb_attach(fb, isconsole);
}
}
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;
u_long 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 = bwtwo_get_video(sc);
break;
case FBIOSVIDEO:
bwtwo_set_video(sc, (*(int *)data));
break;
default:
return (ENOTTY);
}
return (0);
}
static void
bwtwounblank(dev)
struct device *dev;
{
struct bwtwo_softc *sc = (struct bwtwo_softc *)dev;
bwtwo_set_video(sc, 1);
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*/
int
bwtwommap(dev, off, prot)
dev_t dev;
int off, prot;
{
register struct bwtwo_softc *sc = bwtwocd.cd_devs[minor(dev)];
if (off & PGOFSET)
panic("bwtwommap");
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 (REG2PHYS(&sc->sc_phys, sc->sc_pixeloffset + off,
sc->sc_bustype) | PMAP_NC);
}
static int
bwtwo_get_video(sc)
struct bwtwo_softc *sc;
{
#if defined(SUN4)
if (CPU_ISSUN4 && (sc->sc_bustype == BUS_OBIO)) {
if (sc->sc_fb.fb_flags & FB_PFOUR) {
/*
* This handles the overlay plane case, too.
*/
return (fb_pfour_get_video(&sc->sc_fb));
} else
return ((lduba(AC_SYSENABLE,
ASI_CONTROL) & SYSEN_VIDEO) != 0);
}
#endif
return ((sc->sc_reg->fbc_ctrl & FBC_VENAB) != 0);
}
static void
bwtwo_set_video(sc, enable)
struct bwtwo_softc *sc;
int enable;
{
#if defined(SUN4)
if (CPU_ISSUN4 && (sc->sc_bustype == BUS_OBIO)) {
if (sc->sc_fb.fb_flags & FB_PFOUR) {
/*
* This handles the overlay plane case, too.
*/
fb_pfour_set_video(&sc->sc_fb, enable);
return;
}
if (enable)
stba(AC_SYSENABLE, ASI_CONTROL,
lduba(AC_SYSENABLE, ASI_CONTROL) | SYSEN_VIDEO);
else
stba(AC_SYSENABLE, ASI_CONTROL,
lduba(AC_SYSENABLE, ASI_CONTROL) & ~SYSEN_VIDEO);
return;
}
#endif
if (enable)
sc->sc_reg->fbc_ctrl |= FBC_VENAB;
else
sc->sc_reg->fbc_ctrl &= ~FBC_VENAB;
}