xref: /src/sys/dev/isa/vga_isa.c

/* $NetBSD: vga_isa.c,v 1.2 1998/05/28 16:48:41 drochner Exp $ */

/*
 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>

#include <dev/isa/isavar.h>

#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/ic/vgareg.h>
#include <dev/ic/vgavar.h>
#include <dev/isa/vga_isavar.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>

struct vga_isa_softc {
	struct device sc_dev;
#if 0
	struct vga_config *sc_vc;	/* VGA configuration */
#endif
};

int	vga_isa_match __P((struct device *, struct cfdata *, void *));
void	vga_isa_attach __P((struct device *, struct device *, void *));

struct cfattach vga_isa_ca = {
	sizeof(struct vga_isa_softc), vga_isa_match, vga_isa_attach,
};

int
vga_isa_match(parent, match, aux)
	struct device *parent;
	struct cfdata *match;
	void *aux;
{
	struct isa_attach_args *ia = aux;
	int rv;

	/* If values are hardwired to something that they can't be, punt. */
	if (ia->ia_iobase != IOBASEUNK || /* ia->ia_iosize != 0 || XXX isa.c */
	    (ia->ia_maddr != MADDRUNK && ia->ia_maddr != 0xb8000) ||
	    (ia->ia_msize != 0 && ia->ia_msize != 0x8000) ||
	    ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
		return (0);

	if (vga_is_console(ia->ia_iot, WSDISPLAY_TYPE_ISAVGA))
		rv = 2; /* more than generic pcdisplay */
	else
		rv = vga_common_probe(ia->ia_iot, ia->ia_memt);

	if (rv) {
		ia->ia_iobase = 0x3b0;
		ia->ia_iosize = 0x30;
		ia->ia_maddr = 0xb8000;
		ia->ia_msize = 0x8000;
	}
	return (rv);
}

void
vga_isa_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct isa_attach_args *ia = aux;
#if 0
	struct vga_isa_softc *sc = (struct vga_isa_softc *)self;
#endif

	printf("\n");

	vga_common_attach(self, ia->ia_iot, ia->ia_memt,
			  WSDISPLAY_TYPE_ISAVGA);
}

int
vga_isa_cnattach(iot, memt)
	bus_space_tag_t iot, memt;
{
	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
}