NetBSD/sys/dev/isa/pcdisplay.c

421 lines
10 KiB
C

/* $NetBSD: pcdisplay.c,v 1.8 2000/01/05 16:14:36 ad Exp $ */
/*
* Copyright (c) 1998
* Matthias Drochner. All rights reserved.
*
* 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 for the NetBSD Project
* by Matthias Drochner.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/isa/pcdisplayvar.h>
#include <dev/ic/pcdisplay.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
struct pcdisplay_config {
struct pcdisplayscreen pcs;
struct pcdisplay_handle dc_ph;
int mono;
};
struct pcdisplay_softc {
struct device sc_dev;
struct pcdisplay_config *sc_dc;
int nscreens;
};
static int pcdisplayconsole, pcdisplay_console_attached;
static struct pcdisplay_config pcdisplay_console_dc;
int pcdisplay_match __P((struct device *, struct cfdata *, void *));
void pcdisplay_attach __P((struct device *, struct device *, void *));
static int pcdisplay_is_console __P((bus_space_tag_t));
static int pcdisplay_probe_col __P((bus_space_tag_t, bus_space_tag_t));
static int pcdisplay_probe_mono __P((bus_space_tag_t, bus_space_tag_t));
static void pcdisplay_init __P((struct pcdisplay_config *,
bus_space_tag_t, bus_space_tag_t,
int));
static int pcdisplay_alloc_attr __P((void *, int, int, int, long *));
struct cfattach pcdisplay_ca = {
sizeof(struct pcdisplay_softc), pcdisplay_match, pcdisplay_attach,
};
const struct wsdisplay_emulops pcdisplay_emulops = {
pcdisplay_cursor,
pcdisplay_mapchar,
pcdisplay_putchar,
pcdisplay_copycols,
pcdisplay_erasecols,
pcdisplay_copyrows,
pcdisplay_eraserows,
pcdisplay_alloc_attr
};
const struct wsscreen_descr pcdisplay_scr = {
"80x25", 80, 25,
&pcdisplay_emulops,
0, 0, /* no font support */
WSSCREEN_REVERSE /* that's minimal... */
};
const struct wsscreen_descr *_pcdisplay_scrlist[] = {
&pcdisplay_scr,
};
const struct wsscreen_list pcdisplay_screenlist = {
sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *),
_pcdisplay_scrlist
};
static int pcdisplay_ioctl __P((void *, u_long, caddr_t, int, struct proc *));
static int pcdisplay_mmap __P((void *, off_t, int));
static int pcdisplay_alloc_screen __P((void *, const struct wsscreen_descr *,
void **, int *, int *, long *));
static void pcdisplay_free_screen __P((void *, void *));
static int pcdisplay_show_screen __P((void *, void *, int,
void (*) (void *, int, int), void *));
const struct wsdisplay_accessops pcdisplay_accessops = {
pcdisplay_ioctl,
pcdisplay_mmap,
pcdisplay_alloc_screen,
pcdisplay_free_screen,
pcdisplay_show_screen,
0 /* load_font */
};
static int
pcdisplay_probe_col(iot, memt)
bus_space_tag_t iot, memt;
{
bus_space_handle_t memh, ioh_6845;
u_int16_t oldval, val;
if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh))
return (0);
oldval = bus_space_read_2(memt, memh, 0);
bus_space_write_2(memt, memh, 0, 0xa55a);
val = bus_space_read_2(memt, memh, 0);
bus_space_write_2(memt, memh, 0, oldval);
bus_space_unmap(memt, memh, 0x8000);
if (val != 0xa55a)
return (0);
if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845))
return (0);
bus_space_unmap(iot, ioh_6845, 0x10);
return (1);
}
static int
pcdisplay_probe_mono(iot, memt)
bus_space_tag_t iot, memt;
{
bus_space_handle_t memh, ioh_6845;
u_int16_t oldval, val;
if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh))
return (0);
oldval = bus_space_read_2(memt, memh, 0);
bus_space_write_2(memt, memh, 0, 0xa55a);
val = bus_space_read_2(memt, memh, 0);
bus_space_write_2(memt, memh, 0, oldval);
bus_space_unmap(memt, memh, 0x8000);
if (val != 0xa55a)
return (0);
if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845))
return (0);
bus_space_unmap(iot, ioh_6845, 0x10);
return (1);
}
static void
pcdisplay_init(dc, iot, memt, mono)
struct pcdisplay_config *dc;
bus_space_tag_t iot, memt;
int mono;
{
struct pcdisplay_handle *ph = &dc->dc_ph;
int cpos;
ph->ph_iot = iot;
ph->ph_memt = memt;
dc->mono = mono;
if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000,
0, &ph->ph_memh))
panic("pcdisplay_init: cannot map memory");
if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10,
0, &ph->ph_ioh_6845))
panic("pcdisplay_init: cannot map io");
/*
* initialize the only screen
*/
dc->pcs.hdl = ph;
dc->pcs.type = &pcdisplay_scr;
dc->pcs.active = 1;
dc->pcs.mem = NULL;
cpos = pcdisplay_6845_read(ph, cursorh) << 8;
cpos |= pcdisplay_6845_read(ph, cursorl);
/* make sure we have a valid cursor position */
if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols)
cpos = 0;
dc->pcs.dispoffset = 0;
dc->pcs.vc_crow = cpos / pcdisplay_scr.ncols;
dc->pcs.vc_ccol = cpos % pcdisplay_scr.ncols;
dc->pcs.cursoron = 1;
pcdisplay_cursor_init(&dc->pcs);
}
int
pcdisplay_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct isa_attach_args *ia = aux;
int mono;
/* If values are hardwired to something that they can't be, punt. */
if ((ia->ia_iobase != IOBASEUNK &&
ia->ia_iobase != 0x3d0 &&
ia->ia_iobase != 0x3b0) ||
/* ia->ia_iosize != 0 || XXX isa.c */
(ia->ia_maddr != MADDRUNK &&
ia->ia_maddr != 0xb8000 &&
ia->ia_maddr != 0xb0000) ||
(ia->ia_msize != 0 && ia->ia_msize != 0x8000) ||
ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
return (0);
if (pcdisplay_is_console(ia->ia_iot))
mono = pcdisplay_console_dc.mono;
else if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 &&
pcdisplay_probe_col(ia->ia_iot, ia->ia_memt))
mono = 0;
else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 &&
pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt))
mono = 1;
else
return (0);
ia->ia_iobase = mono ? 0x3b0 : 0x3d0;
ia->ia_iosize = 0x10;
ia->ia_maddr = mono ? 0xb0000 : 0xb8000;
ia->ia_msize = 0x8000;
return (1);
}
void
pcdisplay_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self;
int console;
struct pcdisplay_config *dc;
struct wsemuldisplaydev_attach_args aa;
printf("\n");
console = pcdisplay_is_console(ia->ia_iot);
if (console) {
dc = &pcdisplay_console_dc;
sc->nscreens = 1;
pcdisplay_console_attached = 1;
} else {
dc = malloc(sizeof(struct pcdisplay_config),
M_DEVBUF, M_WAITOK);
if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 &&
pcdisplay_probe_col(ia->ia_iot, ia->ia_memt))
pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0);
else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 &&
pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt))
pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1);
else
panic("pcdisplay_attach: display disappeared");
}
sc->sc_dc = dc;
aa.console = console;
aa.scrdata = &pcdisplay_screenlist;
aa.accessops = &pcdisplay_accessops;
aa.accesscookie = sc;
config_found(self, &aa, wsemuldisplaydevprint);
}
int
pcdisplay_cnattach(iot, memt)
bus_space_tag_t iot, memt;
{
int mono;
if (pcdisplay_probe_col(iot, memt))
mono = 0;
else if (pcdisplay_probe_mono(iot, memt))
mono = 1;
else
return (ENXIO);
pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono);
wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc,
pcdisplay_console_dc.pcs.vc_ccol,
pcdisplay_console_dc.pcs.vc_crow,
FG_LIGHTGREY | BG_BLACK);
pcdisplayconsole = 1;
return (0);
}
static int
pcdisplay_is_console(iot)
bus_space_tag_t iot;
{
if (pcdisplayconsole &&
!pcdisplay_console_attached &&
iot == pcdisplay_console_dc.dc_ph.ph_iot)
return (1);
return (0);
}
static int
pcdisplay_ioctl(v, cmd, data, flag, p)
void *v;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
/*
* XXX "do something!"
*/
return (-1);
}
static int
pcdisplay_mmap(v, offset, prot)
void *v;
off_t offset;
int prot;
{
return (-1);
}
static int
pcdisplay_alloc_screen(v, type, cookiep, curxp, curyp, defattrp)
void *v;
const struct wsscreen_descr *type;
void **cookiep;
int *curxp, *curyp;
long *defattrp;
{
struct pcdisplay_softc *sc = v;
if (sc->nscreens > 0)
return (ENOMEM);
*cookiep = sc->sc_dc;
*curxp = 0;
*curyp = 0;
*defattrp = FG_LIGHTGREY | BG_BLACK;
sc->nscreens++;
return (0);
}
static void
pcdisplay_free_screen(v, cookie)
void *v;
void *cookie;
{
struct pcdisplay_softc *sc = v;
if (sc->sc_dc == &pcdisplay_console_dc)
panic("pcdisplay_free_screen: console");
sc->nscreens--;
}
static int
pcdisplay_show_screen(v, cookie, waitok, cb, cbarg)
void *v;
void *cookie;
int waitok;
void (*cb) __P((void *, int, int));
void *cbarg;
{
#ifdef DIAGNOSTIC
struct pcdisplay_softc *sc = v;
if (cookie != sc->sc_dc)
panic("pcdisplay_show_screen: bad screen");
#endif
return (0);
}
static int
pcdisplay_alloc_attr(id, fg, bg, flags, attrp)
void *id;
int fg, bg;
int flags;
long *attrp;
{
if (flags & WSATTR_REVERSE)
*attrp = FG_BLACK | BG_LIGHTGREY;
else
*attrp = FG_LIGHTGREY | BG_BLACK;
return (0);
}