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vga_ofbus.c revision 1.1 
      1 /* $NetBSD: vga_ofbus.c,v 1.1 2002/02/10 07:07:07 thorpej Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/param.h>
     31 #include <sys/systm.h>
     32 #include <sys/kernel.h>
     33 #include <sys/device.h>
     34 #include <sys/malloc.h>
     35 
     36 #include <dev/isa/isavar.h>
     37 
     38 #include <dev/ic/mc6845reg.h>
     39 #include <dev/ic/pcdisplayvar.h>
     40 #include <dev/ic/vgareg.h>
     41 #include <dev/ic/vgavar.h>
     42 
     43 #include <dev/wscons/wsconsio.h>
     44 #include <dev/wscons/wsdisplayvar.h>
     45 
     46 #include <dev/ofw/openfirm.h>
     47 #if 0
     48 #include <dnard/ofw/vga_ofisavar.h>
     49 #endif
     50 
     51 struct vga_ofbus_softc {
     52 	struct vga_softc sc_vga;
     53 
     54 	int sc_phandle;
     55 };
     56 
     57 int	vga_ofbus_match (struct device *, struct cfdata *, void *);
     58 void	vga_ofbus_attach (struct device *, struct device *, void *);
     59 
     60 struct cfattach vga_ofbus_ca = {
     61 	sizeof(struct vga_ofbus_softc), vga_ofbus_match, vga_ofbus_attach,
     62 };
     63 
     64 static const char *compat_strings[] = { "pnpPNP,900", 0 };
     65 
     66 int
     67 vga_ofbus_match(struct device *parent, struct cfdata *match, void *aux)
     68 {
     69 	struct ofbus_attach_args *oba = aux;
     70 
     71 	if (of_compatible(oba->oba_phandle, compat_strings) == -1)
     72 		return (0);
     73 
     74 	if (!vga_is_console(&isa_io_bs_tag, WSDISPLAY_TYPE_ISAVGA) &&
     75 	    !vga_common_probe(&isa_io_bs_tag, &isa_mem_bs_tag))
     76 		return (0);
     77 
     78 	return (2);	/* more than generic pcdisplay */
     79 }
     80 
     81 void
     82 vga_ofbus_attach(struct device *parent, struct device *self, void *aux)
     83 {
     84 	struct vga_ofbus_softc *osc = (void *) self;
     85 	struct vga_softc *sc = &osc->sc_vga;
     86 	struct ofbus_attach_args *oba = aux;
     87 
     88 	printf("\n");
     89 	osc->sc_phandle = oba->oba_phandle;
     90 
     91 	vga_common_attach(sc, &isa_io_bs_tag, &isa_mem_bs_tag,
     92 	    WSDISPLAY_TYPE_ISAVGA, NULL);
     93 }
     94 
     95 int
     96 vga_ofbus_cnattach(int phandle, bus_space_tag_t iot, bus_space_tag_t memt)
     97 {
     98 	if (OF_call_method("text-mode3", phandle, 0, 0) != 0) {
     99 		printf("vga_ofbus_match: text-mode3 method invocation on VGA "
    100 		       "screen device failed\n");
    101 	}
    102 
    103 	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
    104 }
    105