NetBSD/sys/arch/sparc64/dev/cgthree.c

456 lines
12 KiB
C

/* $NetBSD: cgthree.c,v 1.9 2000/06/29 07:37:54 mrg Exp $ */
/*
* 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.
*
* @(#)cgthree.c 8.2 (Berkeley) 10/30/93
*/
/*
* 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/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 <machine/fbio.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/fbvar.h>
#include <machine/cpu.h>
#include <machine/conf.h>
#include <dev/sbus/sbusvar.h>
#include <sparc64/dev/btreg.h>
#include <sparc64/dev/btvar.h>
#include <sparc64/dev/cgthreereg.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 */
struct rom_reg sc_phys; /* phys address description */
volatile struct fbcontrol *sc_fbc; /* Brooktree registers */
int sc_bustype; /* type of bus we live on */
union bt_cmap sc_cmap; /* Brooktree color map */
};
/* autoconfiguration driver */
static void cgthreeattach(struct device *, struct device *, void *);
static int cgthreematch(struct device *, struct cfdata *, void *);
static void cgthreeunblank(struct device *);
/* cdevsw prototypes */
cdev_decl(cgthree);
struct cfattach cgthree_ca = {
sizeof(struct cgthree_softc), cgthreematch, cgthreeattach
};
struct cfdriver cgthree_cd = {
NULL, "cgthree", DV_DULL
};
/* frame buffer generic driver */
static struct fbdriver cgthreefbdriver = {
cgthreeunblank, cgthreeopen, cgthreeclose, cgthreeioctl, cgthreepoll,
cgthreemmap
};
extern int fbnode;
extern struct tty *fbconstty;
static void cgthreeloadcmap __P((struct cgthree_softc *, int, int));
static void cgthree_set_video __P((struct cgthree_softc *, int));
static int cgthree_get_video __P((struct cgthree_softc *));
/* Video control parameters */
struct cg3_videoctrl {
unsigned char sense; /* Monitor sense value */
unsigned char vctrl[12];
} cg3_videoctrl[] = {
/* Missing entries: sense 0x10, 0x30, 0x50 */
{ 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */
{0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1}
},
{ 0x00, /* default? must be last */
{0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1}
}
};
/*
* Match a cgthree.
*/
int
cgthreematch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct confargs *ca = aux;
struct romaux *ra = &ca->ca_ra;
/*
* Mask out invalid flags from the user.
*/
cf->cf_flags &= FB_USERMASK;
if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
return (0);
if (ca->ca_bustype == BUS_SBUS)
return(1);
ra->ra_len = NBPG;
return (probeget(ra->ra_vaddr, ASI_PRIMARY, 4) != -1);
}
/*
* 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 confargs *ca = args;
register int node = 0, ramsize, i;
register volatile struct bt_regs *bt;
int isconsole;
int sbus = 1;
char *nam = NULL;
sc->sc_fb.fb_driver = &cgthreefbdriver;
sc->sc_fb.fb_device = &sc->sc_dev;
sc->sc_fb.fb_flags = sc->sc_dev.dv_cfdata->cf_flags;
/*
* 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;
switch (ca->ca_bustype) {
case BUS_OBIO:
if (CPU_ISSUN4M) { /* 4m has framebuffer on obio */
sbus = 0;
node = ca->ca_ra.ra_node;
nam = getpropstring(node, "model");
break;
}
case BUS_VME32:
case BUS_VME16:
sbus = node = 0;
nam = "cgthree";
break;
case BUS_SBUS:
node = ca->ca_ra.ra_node;
nam = getpropstring(node, "model");
break;
}
sc->sc_fb.fb_type.fb_depth = 8;
fb_setsize(&sc->sc_fb, sc->sc_fb.fb_type.fb_depth,
1152, 900, node, ca->ca_bustype);
ramsize = roundup(sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes,
NBPG);
sc->sc_fb.fb_type.fb_cmsize = 256;
sc->sc_fb.fb_type.fb_size = ramsize;
printf(": %s, %d x %d", nam,
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;
if ((sc->sc_fb.fb_pixels = ca->ca_ra.ra_vaddr) == NULL && isconsole) {
/* this probably cannot happen, but what the heck */
sc->sc_fb.fb_pixels = mapiodev(ca->ca_ra.ra_reg, CG3REG_MEM,
ramsize);
}
sc->sc_fbc = (volatile struct fbcontrol *)
mapiodev(ca->ca_ra.ra_reg, CG3REG_REG,
sizeof(struct fbcontrol));
/* Transfer video magic to board, if it's not running */
if ((sc->sc_fbc->fbc_ctrl & FBC_TIMING) == 0)
for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]);
i++) {
volatile struct fbcontrol *fbc = sc->sc_fbc;
if ((fbc->fbc_status & FBS_MSENSE) ==
cg3_videoctrl[i].sense) {
int j;
printf(" setting video ctrl");
for (j = 0; j < 12; j++)
fbc->fbc_vcontrol[j] =
cg3_videoctrl[i].vctrl[j];
fbc->fbc_ctrl |= FBC_TIMING;
break;
}
}
sc->sc_phys = ca->ca_ra.ra_reg[0];
sc->sc_bustype = ca->ca_bustype;
/* 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;
/* make sure we are not blanked */
cgthree_set_video(sc, 1);
BT_INIT(bt, 0);
if (isconsole) {
printf(" (console)\n");
#ifdef RASTERCONSOLE
fbrcons_init(&sc->sc_fb);
#endif
} else
printf("\n");
if (sbus)
sbus_establish(&sc->sc_sd, &sc->sc_dev);
if (node == fbnode)
fb_attach(&sc->sc_fb, isconsole);
}
int
cgthreeopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit = minor(dev);
if (unit >= cgthree_cd.cd_ndevs || cgthree_cd.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;
u_long cmd;
register caddr_t data;
int flags;
struct proc *p;
{
register struct cgthree_softc *sc = cgthree_cd.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 = cgthree_get_video(sc);
break;
case FBIOSVIDEO:
cgthree_set_video(sc, *(int *)data);
break;
default:
return (ENOTTY);
}
return (0);
}
int
cgthreepoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
return (seltrue(dev, events, p));
}
/*
* Undo the effect of an FBIOSVIDEO that turns the video off.
*/
static void
cgthreeunblank(dev)
struct device *dev;
{
cgthree_set_video((struct cgthree_softc *)dev, 1);
}
static void
cgthree_set_video(sc, enable)
struct cgthree_softc *sc;
int enable;
{
if (enable)
sc->sc_fbc->fbc_ctrl |= FBC_VENAB;
else
sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB;
}
static int
cgthree_get_video(sc)
struct cgthree_softc *sc;
{
return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0);
}
/*
* 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_fbc->fbc_dac;
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....
*
* As well, mapping at an offset of 0x04000000 causes the cg3 to be
* mapped in flat mode without the cg4 emulation.
*/
paddr_t
cgthreemmap(dev, off, prot)
dev_t dev;
off_t off;
int prot;
{
register struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)];
#define START (128*1024 + 128*1024)
#define NOOVERLAY (0x04000000)
if (off < 0)
return (-1);
if (off & PGOFSET)
panic("cgthreemmap");
if ((u_int)off >= NOOVERLAY)
off -= NOOVERLAY;
else if ((u_int)off >= START)
off -= START;
else
off = 0;
if (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, CG3REG_MEM+off) | PMAP_NC);
}