xref: /src/sys/arch/shark/ofw/vga_ofbus.c

/* $NetBSD: vga_ofbus.c,v 1.6.2.1 2005/04/29 11:28:22 kent 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vga_ofbus.c,v 1.6.2.1 2005/04/29 11:28:22 kent Exp $");

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

#include <dev/ofw/openfirm.h>

#include <shark/ofw/vga_ofbusvar.h>

struct vga_ofbus_softc {
	struct vga_softc sc_vga;

	int sc_phandle;
};

int	vga_ofbus_match (struct device *, struct cfdata *, void *);
void	vga_ofbus_attach (struct device *, struct device *, void *);

CFATTACH_DECL(vga_ofbus, sizeof(struct vga_ofbus_softc),
    vga_ofbus_match, vga_ofbus_attach, NULL, NULL);

static const char *compat_strings[] = { "pnpPNP,900", 0 };

int
vga_ofbus_match(struct device *parent, struct cfdata *match, void *aux)
{
	struct ofbus_attach_args *oba = aux;

	if (of_compatible(oba->oba_phandle, compat_strings) == -1)
		return (0);

	if (!vga_is_console(&isa_io_bs_tag, WSDISPLAY_TYPE_ISAVGA) &&
	    !vga_common_probe(&isa_io_bs_tag, &isa_mem_bs_tag))
		return (0);

	return (2);	/* more than generic pcdisplay */
}

void
vga_ofbus_attach(struct device *parent, struct device *self, void *aux)
{
	struct vga_ofbus_softc *osc = (void *) self;
	struct vga_softc *sc = &osc->sc_vga;
	struct ofbus_attach_args *oba = aux;

	printf("\n");
	osc->sc_phandle = oba->oba_phandle;

	vga_common_attach(sc, &isa_io_bs_tag, &isa_mem_bs_tag,
	    WSDISPLAY_TYPE_ISAVGA, 0, NULL);
}

int
vga_ofbus_cnattach(bus_space_tag_t iot, bus_space_tag_t memt)
{
	int chosen_phandle;
	int stdout_ihandle, stdout_phandle;
	char buf[128];

	stdout_phandle = 0;

	/*
	 * Find out whether the firmware's chosen stdout is
	 * a display.  If so, use the existing ihandle so the firmware
	 * doesn't become Unhappy.  If not, just open it.
	 */
	if ((chosen_phandle = OF_finddevice("/chosen")) == -1 ||
	    OF_getprop(chosen_phandle, "stdout", &stdout_ihandle,
	    sizeof(stdout_ihandle)) != sizeof(stdout_ihandle)) {
		return ENXIO;
	}
	stdout_ihandle = of_decode_int((unsigned char *)&stdout_ihandle);
	if ((stdout_phandle = OF_instance_to_package(stdout_ihandle)) == -1 ||
	    OF_getprop(stdout_phandle, "device_type", buf, sizeof(buf)) <= 0) {
		return ENXIO;
	}

	if (strcmp(buf, "display") != 0) {
		/* The display is not stdout device. */
		return ENXIO;
	}

	if (OF_call_method("text-mode3", stdout_ihandle, 0, 0) != 0) {
		printf("vga_ofbus_match: text-mode3 method invocation on VGA "
		       "screen device failed\n");
	}

	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
}