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

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1998-06-09 20:10:25 +04:00
/* $NetBSD: cg4.c,v 1.19 1998/06/09 16:10:25 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/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <vm/vm.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/fbio.h>
#include <machine/idprom.h>
#include <machine/pmap.h>
#include <sun3/dev/fbvar.h>
#include <sun3/dev/btreg.h>
#include <sun3/dev/cg4reg.h>
#include <sun3/dev/p4reg.h>
union bt_cmap_u {
u_char btcm_char[256 * 3]; /* raw data */
u_char btcm_rgb[256][3]; /* 256 R/G/B entries */
u_int btcm_int[256 * 3 / 4]; /* the way the chip gets loaded */
};
#define CG4_TYPE_A 0 /* AMD DACs */
#define CG4_TYPE_B 1 /* Brooktree DACs */
cdev_decl(cg4);
#define CG4_MMAP_SIZE (CG4_OVERLAY_SIZE + CG4_ENABLE_SIZE + CG4_PIXMAP_SIZE)
#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 */
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_video_on; /* zero if blanked */
void *sc_va_cmap; /* Colormap h/w (mapped KVA) */
void *sc_btcm; /* Soft cmap, Brooktree format */
void (*sc_ldcmap) __P((struct cg4_softc *));
struct soft_cmap sc_cmap; /* Soft cmap, user format */
};
/* autoconfiguration driver */
static void cg4attach __P((struct device *, struct device *, void *));
static int cg4match __P((struct device *, struct cfdata *, void *));
struct cfattach cgfour_ca = {
sizeof(struct cg4_softc), cg4match, cg4attach
};
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extern struct cfdriver cgfour_cd;
static int cg4gattr __P((struct fbdevice *, void *));
static int cg4gvideo __P((struct fbdevice *, void *));
static int cg4svideo __P((struct fbdevice *, void *));
static int cg4getcmap __P((struct fbdevice *, void *));
static int cg4putcmap __P((struct fbdevice *, void *));
#ifdef _SUN3_
static void cg4a_init __P((struct cg4_softc *));
static void cg4a_ldcmap __P((struct cg4_softc *));
#endif /* SUN3 */
static void cg4b_init __P((struct cg4_softc *));
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, cf, args)
struct device *parent;
struct cfdata *cf;
void *args;
{
struct confargs *ca = args;
int mid, p4id, peekval, tmp;
void *p4reg;
/* No default address support. */
if (ca->ca_paddr == -1)
return (0);
/*
* Slight hack here: The low four bits of the
* config flags, if set, restrict the match to
* that machine "implementation" only.
*/
mid = cf->cf_flags & IDM_IMPL_MASK;
if (mid && (mid != (cpu_machine_id & IDM_IMPL_MASK)))
return (0);
/*
* The config flag 0x10 if set means we are
* looking for a Type A board (3/110).
*/
if (cf->cf_flags & 0x10) {
#ifdef _SUN3_
/* Type A: Check for AMD RAMDACs in control space. */
if (bus_peek(BUS_OBIO, CG4A_OBIO_CMAP, 1) == -1)
return (0);
/* Check for the overlay plane. */
tmp = ca->ca_paddr + CG4A_OFF_OVERLAY;
if (bus_peek(ca->ca_bustype, tmp, 1) == -1)
return (0);
/* OK, it looks like a Type A. */
return (1);
#else /* SUN3 */
/* Only the Sun3/110 ever has a type A. */
return (0);
#endif /* SUN3 */
}
/*
* From here on, it is a type B or nothing.
* The config flag 0x20 if set means there
* is no P4 register. (bus error)
*/
if ((cf->cf_flags & 0x20) == 0) {
p4reg = bus_tmapin(ca->ca_bustype, ca->ca_paddr);
peekval = peek_long(p4reg);
p4id = (peekval == -1) ?
P4_NOTFOUND : fb_pfour_id(p4reg);
bus_tmapout(p4reg);
if (peekval == -1)
return (0);
if (p4id != P4_ID_COLOR8P1) {
#ifdef DEBUG
printf("cgfour at 0x%x match p4id=0x%x fails\n",
ca->ca_paddr, p4id & 0xFF);
#endif
return (0);
}
}
/*
* Check for CMAP hardware and overlay plane.
*/
tmp = ca->ca_paddr + CG4B_OFF_CMAP;
if (bus_peek(ca->ca_bustype, tmp, 4) == -1)
return (0);
tmp = ca->ca_paddr + CG4B_OFF_OVERLAY;
if (bus_peek(ca->ca_bustype, tmp, 1) == -1)
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;
int tmp;
fbt = &fb->fb_fbtype;
fbt->fb_type = FBTYPE_SUN4COLOR;
fbt->fb_width = 1152; /* default - see below */
fbt->fb_height = 900; /* default - see below */
fbt->fb_depth = 8;
fbt->fb_cmsize = 256;
fbt->fb_size = CG4_MMAP_SIZE;
fb->fb_driver = &cg4_fbdriver;
fb->fb_private = sc;
fb->fb_name = sc->sc_dev.dv_xname;
fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags;
/*
* The config flag 0x10 if set means we are
* attaching a Type A (3/110) which has the
* AMD RAMDACs in control space, and no P4.
*/
if (fb->fb_flags & 0x10) {
#ifdef _SUN3_
sc->sc_cg4type = CG4_TYPE_A;
sc->sc_ldcmap = cg4a_ldcmap;
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_va_cmap = bus_mapin(BUS_OBIO, CG4A_OBIO_CMAP,
sizeof(struct amd_regs));
cg4a_init(sc);
#else /* SUN3 */
panic("cgfour flags 0x10");
#endif /* SUN3 */
} else {
sc->sc_cg4type = CG4_TYPE_B;
sc->sc_ldcmap = cg4b_ldcmap;
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;
tmp = ca->ca_paddr + CG4B_OFF_CMAP;
sc->sc_va_cmap = bus_mapin(ca->ca_bustype, tmp,
sizeof(struct bt_regs));
cg4b_init(sc);
}
if ((fb->fb_flags & 0x20) == 0) {
/* It is supposed to have a P4 register. */
fb->fb_pfour = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4);
}
/*
* Determine width and height as follows:
* If it has a P4 register, use that;
* else if unit==0, use the EEPROM size,
* else make our best guess.
*/
if (fb->fb_pfour)
fb_pfour_setsize(fb);
else if (sc->sc_dev.dv_unit == 0)
fb_eeprom_setsize(fb);
else {
/* Guess based on machine ID. */
switch (cpu_machine_id) {
default:
/* Leave the defaults set above. */
break;
}
}
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printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height);
/*
* Make sure video is on. This driver uses a
* black colormap to blank the screen, so if
* there is any global enable, set it here.
*/
tmp = 1;
cg4svideo(fb, &tmp);
if (fb->fb_pfour)
fb_pfour_set_video(fb, 1);
else
enable_video(1);
/* Let /dev/fb know we are here. */
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 looks completely different.
*/
int
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cg4mmap(dev, off, prot)
dev_t dev;
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 ((off < 0) || (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 without it.
*/
return ((physbase + off) | PMAP_NC);
}
/*
* Internal ioctl functions.
*/
/* FBIOGATTR: */
static int cg4gattr(fb, data)
struct fbdevice *fb;
void *data;
{
struct fbgattr *fba = data;
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, data)
struct fbdevice *fb;
void *data;
{
struct cg4_softc *sc = fb->fb_private;
int *on = data;
*on = sc->sc_video_on;
return (0);
}
/* FBIOSVIDEO: */
static int cg4svideo(fb, data)
struct fbdevice *fb;
void *data;
{
struct cg4_softc *sc = fb->fb_private;
int *on = data;
if (sc->sc_video_on == *on)
return (0);
sc->sc_video_on = *on;
(*sc->sc_ldcmap)(sc);
return (0);
}
/*
* FBIOGETCMAP:
* Copy current colormap out to user space.
*/
static int cg4getcmap(fb, data)
struct fbdevice *fb;
void *data;
{
struct cg4_softc *sc = fb->fb_private;
struct soft_cmap *cm = &sc->sc_cmap;
struct fbcmap *fbcm = data;
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, data)
struct fbdevice *fb;
void *data;
{
struct cg4_softc *sc = fb->fb_private;
struct soft_cmap *cm = &sc->sc_cmap;
struct fbcmap *fbcm = data;
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);
(*sc->sc_ldcmap)(sc);
return (0);
}
/****************************************************************
* Routines for the "Type A" hardware
****************************************************************/
#ifdef _SUN3_
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.
*/
if (sc->sc_video_on) {
/* Update H/W colormap. */
for (i = 0; i < 256; i++) {
ar->r[i] = cm->r[i];
ar->g[i] = cm->g[i];
ar->b[i] = cm->b[i];
}
} else {
/* Clear H/W colormap. */
for (i = 0; i < 256; i++) {
ar->r[i] = 0;
ar->g[i] = 0;
ar->b[i] = 0;
}
}
}
#endif /* SUN3 */
/****************************************************************
* 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_u *btcm;
int i;
/* Need a buffer for colormap format translation. */
btcm = malloc(sizeof(*btcm), M_DEVBUF, M_WAITOK);
sc->sc_btcm = btcm;
/*
* BT458 chip initialization as described in Brooktree's
* 1993 Graphics and Imaging Product Databook (DB004-1/93).
*
* It appears that the 3/60 uses the low byte, and the 3/80
* uses the high byte, while both ignore the other bytes.
* Writing same value to all bytes works on both.
*/
bt->bt_addr = 0x04040404; /* select read mask register */
bt->bt_ctrl = ~0; /* all planes on */
bt->bt_addr = 0x05050505; /* select blink mask register */
bt->bt_ctrl = 0; /* all planes non-blinking */
bt->bt_addr = 0x06060606; /* select command register */
bt->bt_ctrl = 0x43434343; /* palette enabled, overlay planes enabled */
bt->bt_addr = 0x07070707; /* select test register */
bt->bt_ctrl = 0; /* not test mode */
/* grab initial (current) color map */
bt->bt_addr = 0;
#ifdef _SUN3_
/* Sun3/60 wants 32-bit access, packed. */
for (i = 0; i < (256 * 3 / 4); i++)
btcm->btcm_int[i] = bt->bt_cmap;
#else /* SUN3 */
/* Sun3/80 wants 8-bits in the high byte. */
for (i = 0; i < (256 * 3); i++)
btcm->btcm_char[i] = bt->bt_cmap >> 24;
#endif /* SUN3 */
/* Transpose into H/W cmap into S/W form. */
for (i = 0; i < 256; i++) {
cm->r[i] = btcm->btcm_rgb[i][0];
cm->g[i] = btcm->btcm_rgb[i][1];
cm->b[i] = btcm->btcm_rgb[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_u *btcm = sc->sc_btcm;
int i;
/* Transpose S/W cmap into H/W form. */
for (i = 0; i < 256; i++) {
btcm->btcm_rgb[i][0] = cm->r[i];
btcm->btcm_rgb[i][1] = cm->g[i];
btcm->btcm_rgb[i][2] = cm->b[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.
*/
bt->bt_addr = 0;
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#ifdef _SUN3_
/* Sun3/60 wants 32-bit access, packed. */
if (sc->sc_video_on) {
/* Update H/W colormap. */
for (i = 0; i < (256 * 3 / 4); i++)
bt->bt_cmap = btcm->btcm_int[i];
} else {
/* Clear H/W colormap. */
for (i = 0; i < (256 * 3 / 4); i++)
bt->bt_cmap = 0;
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}
#else /* SUN3 */
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/* Sun3/80 wants 8-bits in the high byte. */
if (sc->sc_video_on) {
/* Update H/W colormap. */
for (i = 0; i < (256 * 3); i++)
bt->bt_cmap = btcm->btcm_char[i] << 24;
} else {
/* Clear H/W colormap. */
for (i = 0; i < (256 * 3); i++)
bt->bt_cmap = 0;
}
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#endif /* SUN3 */
}