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

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/* $NetBSD: cgeight.c,v 1.18 1998/04/07 20:18:18 pk Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1995 Theo de Raadt
* 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.
*
* from @(#)cgthree.c 8.2 (Berkeley) 10/30/93
*/
/*
* color display (cgeight) 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/systm.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 <sys/conf.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/conf.h>
#include <sparc/dev/btreg.h>
#include <sparc/dev/btvar.h>
#include <sparc/dev/pfourreg.h>
/* per-display variables */
struct cgeight_softc {
struct device sc_dev; /* base device */
struct fbdevice sc_fb; /* frame buffer device */
bus_space_tag_t sc_bustag;
bus_type_t sc_btype; /* phys address description */
bus_addr_t sc_paddr; /* for device mmap() */
volatile struct fbcontrol *sc_fbc; /* Brooktree registers */
union bt_cmap sc_cmap; /* Brooktree color map */
};
/* autoconfiguration driver */
static void cgeightattach(struct device *, struct device *, void *);
static int cgeightmatch(struct device *, struct cfdata *, void *);
#if defined(SUN4)
static void cgeightunblank __P((struct device *));
#endif
static int cg8_pfour_probe __P((void *, void *));
/* cdevsw prototypes */
cdev_decl(cgeight);
struct cfattach cgeight_ca = {
sizeof(struct cgeight_softc), cgeightmatch, cgeightattach
};
extern struct cfdriver cgeight_cd;
#if defined(SUN4)
/* frame buffer generic driver */
static struct fbdriver cgeightfbdriver = {
cgeightunblank, cgeightopen, cgeightclose, cgeightioctl,
cgeightpoll, cgeightmmap
};
extern int fbnode;
extern struct tty *fbconstty;
static void cgeightloadcmap __P((struct cgeight_softc *, int, int));
static int cgeight_get_video __P((struct cgeight_softc *));
static void cgeight_set_video __P((struct cgeight_softc *, int));
#endif
/*
* Match a cgeight.
*/
int
cgeightmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
union obio_attach_args *uoba = aux;
struct obio4_attach_args *oba;
if (uoba->uoba_isobio4 == 0)
return (0);
oba = &uoba->uoba_oba4;
return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr,
4, /* probe size */
0, /* offset */
0, /* flags */
cg8_pfour_probe, NULL));
}
int
cg8_pfour_probe(vaddr, arg)
void *vaddr;
void *arg;
{
return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24);
}
/*
* Attach a display. We need to notice if it is the console, too.
*/
void
cgeightattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
#if defined(SUN4)
union obio_attach_args *uoba = aux;
struct obio4_attach_args *oba = &uoba->uoba_oba4;
struct cgeight_softc *sc = (struct cgeight_softc *)self;
struct fbdevice *fb = &sc->sc_fb;
bus_space_handle_t bh;
volatile struct bt_regs *bt;
int ramsize, i, isconsole;
sc->sc_bustag = oba->oba_bustag;
sc->sc_btype = (bus_type_t)0;
sc->sc_paddr = (bus_addr_t)oba->oba_paddr;
/* Map the pfour register. */
if (obio_bus_map(oba->oba_bustag, oba->oba_paddr,
0,
sizeof(u_int32_t),
BUS_SPACE_MAP_LINEAR,
0, &bh) != 0) {
printf("%s: cannot map pfour register\n", self->dv_xname);
return;
}
fb->fb_pfour = (volatile u_int32_t *)bh;
fb->fb_driver = &cgeightfbdriver;
fb->fb_device = &sc->sc_dev;
fb->fb_type.fb_type = FBTYPE_MEMCOLOR;
fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK;
fb->fb_flags |= FB_PFOUR;
ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY;
fb->fb_type.fb_depth = 24;
fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900);
sc->sc_fb.fb_type.fb_cmsize = 256;
sc->sc_fb.fb_type.fb_size = ramsize;
printf(": cgeight/p4, %d x %d",
fb->fb_type.fb_width,
fb->fb_type.fb_height);
isconsole = 0;
if (CPU_ISSUN4) {
struct eeprom *eep = (struct eeprom *)eeprom_va;
/*
* Assume this is the console if there's no eeprom info
* to be found.
*/
if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT)
isconsole = (fbconstty != NULL);
}
#if 0
/*
* We don't do any of the console handling here. Instead,
* we let the bwtwo driver pick up the overlay plane and
* use it instead. Rconsole should have better performance
* with the 1-bit depth.
* -- Jason R. Thorpe <thorpej@NetBSD.ORG>
*/
/*
* When the ROM has mapped in a cgfour 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.
*/
if (isconsole) {
/* XXX this is kind of a waste */
fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg,
PFOUR_COLOR_OFF_OVERLAY, ramsize);
}
#endif
/* Map the Brooktree. */
if (obio_bus_map(oba->oba_bustag, oba->oba_paddr,
PFOUR_COLOR_OFF_CMAP,
sizeof(struct fbcontrol),
BUS_SPACE_MAP_LINEAR,
0, &bh) != 0) {
printf("%s: cannot map control registers\n", self->dv_xname);
return;
}
sc->sc_fbc = (volatile struct fbcontrol *)bh;
#if 0 /* XXX thorpej ??? */
/* tell the enable plane to look at the mono image */
memset(ca->ca_ra.ra_vaddr, 0xff,
sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8);
#endif
/* grab initial (current) color map */
bt = &sc->sc_fbc->fbc_dac;
bt->bt_addr = 0;
for (i = 0; i < 256 * 3 / 4; i++)
sc->sc_cmap.cm_chip[i] = bt->bt_cmap;
BT_INIT(bt, 0);
#if 0 /* see above */
if (isconsole) {
printf(" (console)\n");
#if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */
fbrcons_init(fb);
#endif
} else
#endif /* 0 */
printf("\n");
/*
* Even though we're not using rconsole, we'd still like
* to notice if we're the console framebuffer.
*/
fb_attach(&sc->sc_fb, isconsole);
#endif
}
int
cgeightopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit = minor(dev);
if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL)
return (ENXIO);
return (0);
}
int
cgeightclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return (0);
}
int
cgeightioctl(dev, cmd, data, flags, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flags;
struct proc *p;
{
#if defined(SUN4)
struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)];
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 */
cgeightloadcmap(sc, p->index, p->count);
#undef p
break;
case FBIOGVIDEO:
*(int *)data = cgeight_get_video(sc);
break;
case FBIOSVIDEO:
cgeight_set_video(sc, *(int *)data);
break;
default:
return (ENOTTY);
}
#endif
return (0);
}
int
cgeightpoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
return (seltrue(dev, events, p));
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*
* The cg8 maps it's overlay plane at 0 for 128K, followed by the
* enable plane for 128K, followed by the colour for as long as it
* goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4
* register for NBPG, then the bootrom for 0x40000.
*/
int
cgeightmmap(dev, off, prot)
dev_t dev;
int off, prot;
{
struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)];
bus_space_handle_t bh;
int poff;
#define START_ENABLE (128*1024)
#define START_COLOR ((128*1024) + (128*1024))
#define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \
sc->sc_fb.fb_type.fb_height * 3)
#define END_COLOR (START_COLOR + COLOR_SIZE)
#define START_SPECIAL 0x800000
#define PROMSIZE 0x40000
#define NOOVERLAY (0x04000000)
if (off & PGOFSET)
panic("cgeightmap");
if ((u_int)off >= NOOVERLAY) {
off -= NOOVERLAY;
/*
* X11 maps a huge chunk of the frame buffer; far more than
* there really is. We compensate by double-mapping the
* first page for as many other pages as it wants
*/
while (off >= COLOR_SIZE)
off -= COLOR_SIZE; /* XXX thorpej ??? */
poff = off + PFOUR_COLOR_OFF_COLOR;
} else if ((u_int)off < START_ENABLE) {
/*
* in overlay plane
*/
poff = PFOUR_COLOR_OFF_OVERLAY + off;
} else if ((u_int)off < START_COLOR) {
/*
* in enable plane
*/
poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE;
} else if ((u_int)off < sc->sc_fb.fb_type.fb_size) {
/*
* in colour plane
*/
poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR;
} else if ((u_int)off < START_SPECIAL) {
/*
* hole
*/
poff = 0; /* XXX */
} else if ((u_int)off == START_SPECIAL) {
/*
* colour map (Brooktree)
*/
poff = PFOUR_COLOR_OFF_CMAP;
} else if ((u_int)off == START_SPECIAL + NBPG) {
/*
* p4 register
*/
poff = 0;
} else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) &&
(u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) {
/*
* rom
*/
poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2)));
} else
return (-1);
if (bus_space_mmap(sc->sc_bustag,
sc->sc_btype,
sc->sc_paddr + poff,
BUS_SPACE_MAP_LINEAR, &bh))
return (-1);
return ((int)bh);
}
#if defined(SUN4)
/*
* Undo the effect of an FBIOSVIDEO that turns the video off.
*/
static void
cgeightunblank(dev)
struct device *dev;
{
cgeight_set_video((struct cgeight_softc *)dev, 1);
}
static int
cgeight_get_video(sc)
struct cgeight_softc *sc;
{
return (fb_pfour_get_video(&sc->sc_fb));
}
static void
cgeight_set_video(sc, enable)
struct cgeight_softc *sc;
int enable;
{
fb_pfour_set_video(&sc->sc_fb, enable);
}
/*
* Load a subset of the current (new) colormap into the Brooktree DAC.
*/
static void
cgeightloadcmap(sc, start, ncolors)
register struct cgeight_softc *sc;
register int start, ncolors;
{
volatile struct bt_regs *bt;
u_int *ip;
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_fbc->fbc_dac;
bt->bt_addr = BT_D4M4(start);
while (--count >= 0)
bt->bt_cmap = *ip++;
}
#endif
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