/*
* 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. 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 (bw2) driver.
*
* Does not handle interrupts, even though they can occur.
*/
static int
bw2match(device_t parent, cfdata_t cf, void *args)
{
struct confargs *ca = args;
int mid, p4id, peekval;
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 != 0 && (mid != (cpu_machine_id & IDM_IMPL_MASK)))
return 0;
/*
* Make sure something is there, and if so,
* see if it looks like a P4 register.
*/
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;
/*
* The config flag 0x40 if set means we should match
* only on a CG? overlay plane. We can use only the
* CG4 and CG8, which both have a P4 register.
*/
if (cf->cf_flags & 0x40) {
switch (p4id) {
case P4_ID_COLOR8P1:
case P4_ID_COLOR24:
return 1;
case P4_NOTFOUND:
default:
return 0;
}
}
/*
* OK, we are expecting a plain old BW2, and
* there may or may not be a P4 register.
*/
switch (p4id) {
case P4_ID_BW:
case P4_NOTFOUND:
return 1;
default:
#ifdef DEBUG
aprint_debug("bwtwo at 0x%lx match p4id=0x%x fails\n",
ca->ca_paddr, p4id & 0xFF);
#endif
break;
}
return 0;
}
/*
* Attach a display. We need to notice if it is the console, too.
*/
static void
bw2attach(device_t parent, device_t self, void *args)
{
struct bw2_softc *sc = device_private(self);
struct fbdevice *fb = &sc->sc_fb;
struct confargs *ca = args;
struct fbtype *fbt;
void *p4reg;
int p4id, tmp;
int pixeloffset; /* offset to framebuffer */
/* Set up default pixel offset. May be changed below. */
pixeloffset = 0;
/* Does it have a P4 register? */
p4reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4);
p4id = fb_pfour_id(p4reg);
if (p4id != P4_NOTFOUND)
fb->fb_pfour = p4reg;
else
bus_mapout(p4reg, 4);
switch (p4id) {
case P4_NOTFOUND:
pixeloffset = 0;
break;
case P4_ID_BW:
pixeloffset = P4_BW_OFF;
break;
default:
aprint_error("%s: bad p4id=0x%x\n", fb->fb_name, p4id);
/* Must be some kinda color... */
/* FALLTHROUGH */
case P4_ID_COLOR8P1:
case P4_ID_COLOR24:
sc->sc_ovtype = p4id;
pixeloffset = P4_COLOR_OFF_OVERLAY;
break;
}
sc->sc_phys = ca->ca_paddr + pixeloffset;
/*
* 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);
/* XXX device_unit() abuse */
else if (device_unit(self) == 0)
fb_eeprom_setsize(fb);
else {
/* Guess based on machine ID. */
switch (cpu_machine_id) {
#ifdef _SUN3_
case ID_SUN3_60:
/*
* Only the model 60 can have hi-res.
* Look at the "resolution" jumper.
*/
tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1);
if ((tmp != -1) && (tmp & 0x80) == 0)
goto high_res;
break;
case ID_SUN3_260:
/* The Sun3/260 is ALWAYS high-resolution! */
/* fall through */
high_res:
fbt->fb_width = 1600;
fbt->fb_height = 1280;
fbt->fb_size = BW2_FBSIZE_HIRES;
break;
#endif /* SUN3 */
default:
/* Leave the defaults set above. */
break;
}
}
aprint_normal(" (%dx%d)\n", fbt->fb_width, fbt->fb_height);
/* Make sure video is on. */
tmp = 1;
bw2svideo(fb, &tmp);
/* Let /dev/fb know we are here. */
fb_attach(fb, 1);
}
static int
bw2open(dev_t dev, int flags, int mode, struct lwp *l)
{
struct bw2_softc *sc;
int unit = minor(dev);
static int
bw2ioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
{
struct bw2_softc *sc = device_lookup_private(&bwtwo_cd, 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.
*/
static paddr_t
bw2mmap(dev_t dev, off_t off, int prot)
{
struct bw2_softc *sc = device_lookup_private(&bwtwo_cd, minor(dev));
int size = sc->sc_fb.fb_fbtype.fb_size;
if (off & PGOFSET)
panic("%s: bad offset", __func__);
if ((off < 0) || (off >= size))
return -1;
/*
* I turned on PMAP_NC here to disable the cache as I was
* getting horribly broken behaviour without it.
*/
return (sc->sc_phys + off) | PMAP_NC;
}
/* FBIOGVIDEO: */
static int
bw2gvideo(struct fbdevice *fb, void *data)
{
struct bw2_softc *sc = fb->fb_private;
int *on = data;
*on = sc->sc_video_on;
return 0;
}
/* FBIOSVIDEO: */
static int
bw2svideo(struct fbdevice *fb, void *data)
{
struct bw2_softc *sc = fb->fb_private;
int *on = data;
if (sc->sc_video_on == *on)
return 0;
sc->sc_video_on = *on;
if (fb->fb_pfour)
fb_pfour_set_video(fb, sc->sc_video_on);
else
enable_video(sc->sc_video_on);
