NetBSD/sys/arch/sun3/dev/cg4.c

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/* $NetBSD: cg4.c,v 1.11 1996/10/29 19:54:19 gwr 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.
*
* from: @(#)cgthree.c 8.2 (Berkeley) 10/30/93
*/
/*
* color display (cg4) driver.
*
* Credits, history:
* Gordon Ross created this driver based on the cg3 driver from
* the sparc port as distributed in BSD 4.4 Lite, but included
* support for only the "type B" adapter (Brooktree DACs).
* Ezra Story added support for the "type A" (AMD DACs).
*
* Todo:
* Make this driver handle video interrupts.
* Defer colormap updates to vertical retrace interrupts.
*/
#include <sys/param.h>
#include <sys/systm.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/cpu.h>
#include <machine/fbio.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include "fbvar.h"
#include "btreg.h"
#include "btvar.h"
#include "cg4reg.h"
#define CG4_MMAP_SIZE (CG4_OVERLAY_SIZE + CG4_ENABLE_SIZE + CG4_PIXMAP_SIZE)
extern unsigned char cpu_machine_id;
#define CMAP_SIZE 256
struct soft_cmap {
u_char r[CMAP_SIZE];
u_char g[CMAP_SIZE];
u_char b[CMAP_SIZE];
};
/* per-display variables */
struct cg4_softc {
struct device sc_dev; /* base device */
struct fbdevice sc_fb; /* frame buffer device */
int sc_cg4type; /* A or B */
void *sc_va_cmap; /* Colormap h/w (mapped KVA) */
int sc_pa_overlay; /* phys. addr. of overlay plane */
int sc_pa_enable; /* phys. addr. of enable plane */
int sc_pa_pixmap; /* phys. addr. of color plane */
int sc_blanked; /* true if blanked */
union bt_cmap *sc_btcm; /* Brooktree color map */
struct soft_cmap sc_cmap; /* Generic soft colormap. */
};
/* autoconfiguration driver */
static void cg4attach __P((struct device *, struct device *, void *));
static int cg4match __P((struct device *, void *, void *));
struct cfattach cgfour_ca = {
sizeof(struct cg4_softc), cg4match, cg4attach
};
struct cfdriver cgfour_cd = {
NULL, "cgfour", DV_DULL
};
/* frame buffer generic driver */
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int cg4open(), cg4close(), cg4mmap();
static int cg4gattr __P((struct fbdevice *, struct fbgattr *));
static int cg4gvideo __P((struct fbdevice *, int *));
static int cg4svideo __P((struct fbdevice *, int *));
static int cg4getcmap __P((struct fbdevice *, struct fbcmap *));
static int cg4putcmap __P((struct fbdevice *, struct fbcmap *));
static void cg4a_init __P((struct cg4_softc *));
static void cg4a_svideo __P((struct cg4_softc *, int));
static void cg4a_ldcmap __P((struct cg4_softc *));
static void cg4b_init __P((struct cg4_softc *));
static void cg4b_svideo __P((struct cg4_softc *, int));
static void cg4b_ldcmap __P((struct cg4_softc *));
static struct fbdriver cg4_fbdriver = {
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cg4open, cg4close, cg4mmap, cg4gattr,
cg4gvideo, cg4svideo,
cg4getcmap, cg4putcmap };
/*
* Match a cg4.
*/
static int
cg4match(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
struct confargs *ca = args;
int paddr;
/* XXX: Huge hack due to lack of probe info... */
/* XXX: Machines that might have a cg4 (gag). */
/* XXX: Need info on the "P4" register... */
switch (cpu_machine_id) {
case SUN3_MACH_110:
/* XXX: Assume type A. */
if (ca->ca_paddr == -1)
ca->ca_paddr = CG4A_DEF_BASE;
if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1)
return (0);
if (bus_peek(BUS_OBIO, CG4A_OBIO_CMAP, 1) == -1)
return (0);
break;
case SUN3_MACH_60:
/* XXX: Assume type A. */
if (ca->ca_paddr == -1)
ca->ca_paddr = CG4B_DEF_BASE;
paddr = ca->ca_paddr;
if (bus_peek(ca->ca_bustype, paddr, 1) == -1)
return (0);
/* Make sure we're color */
paddr += CG4B_OFF_PIXMAP;
if (bus_peek(ca->ca_bustype, paddr, 1) == -1)
return (0);
break;
default:
return (0);
}
return (1);
}
/*
* Attach a display. We need to notice if it is the console, too.
*/
static void
cg4attach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct cg4_softc *sc = (struct cg4_softc *)self;
struct fbdevice *fb = &sc->sc_fb;
struct confargs *ca = args;
struct fbtype *fbt;
/* XXX: should do better than this... */
switch (cpu_machine_id) {
case SUN3_MACH_110:
sc->sc_cg4type = CG4_TYPE_A;
break;
case SUN3_MACH_60:
default:
sc->sc_cg4type = CG4_TYPE_B;
}
fb->fb_driver = &cg4_fbdriver;
fb->fb_private = sc;
fb->fb_name = sc->sc_dev.dv_xname;
fbt = &fb->fb_fbtype;
fbt->fb_type = FBTYPE_SUN4COLOR;
fbt->fb_depth = 8;
fbt->fb_cmsize = 256;
fbt->fb_width = 1152;
fbt->fb_height = 900;
fbt->fb_size = CG4_MMAP_SIZE;
switch (sc->sc_cg4type) {
case CG4_TYPE_A: /* Sun3/110 */
sc->sc_va_cmap = bus_mapin(BUS_OBIO, CG4A_OBIO_CMAP,
sizeof(struct amd_regs));
sc->sc_pa_overlay = ca->ca_paddr + CG4A_OFF_OVERLAY;
sc->sc_pa_enable = ca->ca_paddr + CG4A_OFF_ENABLE;
sc->sc_pa_pixmap = ca->ca_paddr + CG4A_OFF_PIXMAP;
sc->sc_btcm = NULL;
cg4a_init(sc);
break;
case CG4_TYPE_B: /* Sun3/60 */
default:
sc->sc_va_cmap = (struct bt_regs *)
bus_mapin(ca->ca_bustype, ca->ca_paddr,
sizeof(struct bt_regs *));
sc->sc_pa_overlay = ca->ca_paddr + CG4B_OFF_OVERLAY;
sc->sc_pa_enable = ca->ca_paddr + CG4B_OFF_ENABLE;
sc->sc_pa_pixmap = ca->ca_paddr + CG4B_OFF_PIXMAP;
sc->sc_btcm = malloc(sizeof(union bt_cmap), M_DEVBUF, M_WAITOK);
cg4b_init(sc);
break;
}
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printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height);
fb_attach(fb, 4);
}
int
cg4open(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit = minor(dev);
if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL)
return (ENXIO);
return (0);
}
int
cg4close(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return (0);
}
int
cg4ioctl(dev, cmd, data, flags, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flags;
struct proc *p;
{
struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)];
return (fbioctlfb(&sc->sc_fb, cmd, data));
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*
* X11 expects its mmap'd region to look like this:
* 128k overlay data memory
* 128k overlay enable bitmap
* 1024k color memory
*
* The hardware really looks like this (starting at ca_paddr)
* 4 bytes Brooktree DAC registers
* 2MB-4 gap
* 128k overlay memory
* 1920k gap
* 128k overlay-enable bitmap
* 1920k gap
* 1024k color memory
*/
int
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cg4mmap(dev, off, prot)
dev_t dev;
register int off;
int prot;
{
struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)];
register int physbase;
if (off & PGOFSET)
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panic("cg4mmap");
if ((unsigned)off >= CG4_MMAP_SIZE)
return (-1);
if (off < 0x40000) {
if (off < 0x20000) {
physbase = sc->sc_pa_overlay;
} else {
/* enable plane */
off -= 0x20000;
physbase = sc->sc_pa_enable;
}
} else {
/* pixel map */
off -= 0x40000;
physbase = sc->sc_pa_pixmap;
}
/*
* I turned on PMAP_NC here to disable the cache as I was
* getting horribly broken behaviour with it on.
*/
return ((physbase + off) | PMAP_NC);
}
/*
* Internal ioctl functions.
*/
/* FBIOGATTR: */
static int cg4gattr(fb, fba)
struct fbdevice *fb;
struct fbgattr *fba;
{
fba->real_type = fb->fb_fbtype.fb_type;
fba->owner = 0; /* XXX - TIOCCONS stuff? */
fba->fbtype = fb->fb_fbtype;
fba->sattr.flags = 0;
fba->sattr.emu_type = fb->fb_fbtype.fb_type;
fba->sattr.dev_specific[0] = -1;
fba->emu_types[0] = fb->fb_fbtype.fb_type;
fba->emu_types[1] = -1;
return (0);
}
/* FBIOGVIDEO: */
static int cg4gvideo(fb, on)
struct fbdevice *fb;
int *on;
{
struct cg4_softc *sc = fb->fb_private;
*on = !sc->sc_blanked;
return (0);
}
/* FBIOSVIDEO: */
static int cg4svideo(fb, on)
struct fbdevice *fb;
int *on;
{
struct cg4_softc *sc = fb->fb_private;
int state;
state = *on;
if (sc->sc_cg4type == CG4_TYPE_A)
cg4a_svideo(sc, state);
else
cg4b_svideo(sc, state);
return (0);
}
/*
* FBIOGETCMAP:
* Copy current colormap out to user space.
*/
static int cg4getcmap(fb, fbcm)
struct fbdevice *fb;
struct fbcmap *fbcm;
{
struct cg4_softc *sc = fb->fb_private;
struct soft_cmap *cm = &sc->sc_cmap;
int error, start, count;
start = fbcm->index;
count = fbcm->count;
if ((start < 0) || (start >= CMAP_SIZE) ||
(count < 0) || (start + count > CMAP_SIZE) )
return (EINVAL);
if ((error = copyout(&cm->r[start], fbcm->red, count)) != 0)
return (error);
if ((error = copyout(&cm->g[start], fbcm->green, count)) != 0)
return (error);
if ((error = copyout(&cm->b[start], fbcm->blue, count)) != 0)
return (error);
return (0);
}
/*
* FBIOPUTCMAP:
* Copy new colormap from user space and load.
*/
static int cg4putcmap(fb, fbcm)
struct fbdevice *fb;
struct fbcmap *fbcm;
{
struct cg4_softc *sc = fb->fb_private;
struct soft_cmap *cm = &sc->sc_cmap;
int error, start, count;
start = fbcm->index;
count = fbcm->count;
if ((start < 0) || (start >= CMAP_SIZE) ||
(count < 0) || (start + count > CMAP_SIZE) )
return (EINVAL);
if ((error = copyin(fbcm->red, &cm->r[start], count)) != 0)
return (error);
if ((error = copyin(fbcm->green, &cm->g[start], count)) != 0)
return (error);
if ((error = copyin(fbcm->blue, &cm->b[start], count)) != 0)
return (error);
if (sc->sc_cg4type == CG4_TYPE_A)
cg4a_ldcmap(sc);
else
cg4b_ldcmap(sc);
return (0);
}
/****************************************************************
* Routines for the "Type A" hardware
****************************************************************/
static void
cg4a_init(sc)
struct cg4_softc *sc;
{
volatile struct amd_regs *ar = sc->sc_va_cmap;
struct soft_cmap *cm = &sc->sc_cmap;
int i;
/* grab initial (current) color map */
for(i = 0; i < 256; i++) {
cm->r[i] = ar->r[i];
cm->g[i] = ar->g[i];
cm->b[i] = ar->b[i];
}
}
static void
cg4a_ldcmap(sc)
struct cg4_softc *sc;
{
volatile struct amd_regs *ar = sc->sc_va_cmap;
struct soft_cmap *cm = &sc->sc_cmap;
int i;
/*
* Now blast them into the chip!
* XXX Should use retrace interrupt!
* Just set a "need load" bit and let the
* retrace interrupt handler do the work.
*/
for(i = 0; i < 256; i++) {
ar->r[i] = cm->r[i];
ar->g[i] = cm->g[i];
ar->b[i] = cm->b[i];
}
}
static void
cg4a_svideo(sc, on)
struct cg4_softc *sc;
int on;
{
volatile struct amd_regs *ar = sc->sc_va_cmap;
int i;
if ((on == 0) && (sc->sc_blanked == 0)) {
/* Turn OFF video (make it blank). */
sc->sc_blanked = 1;
/* Load fake "all zero" colormap. */
for (i = 0; i < 256; i++) {
ar->r[i] = 0;
ar->g[i] = 0;
ar->b[i] = 0;
}
}
if ((on != 0) && (sc->sc_blanked != 0)) {
/* Turn video back ON (unblank). */
sc->sc_blanked = 0;
/* Restore normal colormap. */
cg4a_ldcmap(sc);
}
}
/****************************************************************
* Routines for the "Type B" hardware
****************************************************************/
static void
cg4b_init(sc)
struct cg4_softc *sc;
{
volatile struct bt_regs *bt = sc->sc_va_cmap;
struct soft_cmap *cm = &sc->sc_cmap;
union bt_cmap *btcm = sc->sc_btcm;
int i;
/*
* BT458 chip initialization as described in Brooktree's
* 1993 Graphics and Imaging Product Databook (DB004-1/93).
*/
bt->bt_addr = 0x04; /* select read mask register */
bt->bt_ctrl = 0xff; /* all planes on */
bt->bt_addr = 0x05; /* select blink mask register */
bt->bt_ctrl = 0x00; /* all planes non-blinking */
bt->bt_addr = 0x06; /* select command register */
bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */
bt->bt_addr = 0x07; /* select test register */
bt->bt_ctrl = 0x00; /* set test mode */
/* grab initial (current) color map */
bt->bt_addr = 0;
for (i = 0; i < (256 * 3 / 4); i++) {
btcm->cm_chip[i] = bt->bt_cmap;
}
/* Transpose into S/W form. */
for (i = 0; i < 256; i++) {
cm->r[i] = btcm->cm_map[i][0];
cm->g[i] = btcm->cm_map[i][1];
cm->b[i] = btcm->cm_map[i][2];
}
}
static void
cg4b_ldcmap(sc)
struct cg4_softc *sc;
{
volatile struct bt_regs *bt = sc->sc_va_cmap;
struct soft_cmap *cm = &sc->sc_cmap;
union bt_cmap *btcm = sc->sc_btcm;
int i;
/*
* Now blast them into the chip!
* XXX Should use retrace interrupt!
* Just set a "need load" bit and let the
* retrace interrupt handler do the work.
*/
/* Transpose into H/W form. */
for (i = 0; i < 256; i++) {
btcm->cm_map[i][0] = cm->r[i];
btcm->cm_map[i][1] = cm->g[i];
btcm->cm_map[i][2] = cm->b[i];
}
bt->bt_addr = 0;
for (i = 0; i < (256 * 3 / 4); i++) {
bt->bt_cmap = btcm->cm_chip[i];
}
}
static void
cg4b_svideo(sc, on)
struct cg4_softc *sc;
int on;
{
volatile struct bt_regs *bt = sc->sc_va_cmap;
int i;
if ((on == 0) && (sc->sc_blanked == 0)) {
/* Turn OFF video (make it blank). */
sc->sc_blanked = 1;
/* Load fake "all zero" colormap. */
bt->bt_addr = 0;
for (i = 0; i < (256 * 3 / 4); i++)
bt->bt_cmap = 0;
}
if ((on != 0) && (sc->sc_blanked != 0)) {
/* Turn video back ON (unblank). */
sc->sc_blanked = 0;
/* Restore normal colormap. */
cg4b_ldcmap(sc);
}
}