Home | History | Annotate | Line # | Download | only in isa
vga_isa.c revision 1.2 
      1 /* $NetBSD: vga_isa.c,v 1.2 1998/05/28 16:48:41 drochner 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 #include <dev/isa/vga_isavar.h>
     43 
     44 #include <dev/wscons/wsconsio.h>
     45 #include <dev/wscons/wsdisplayvar.h>
     46 
     47 struct vga_isa_softc {
     48 	struct device sc_dev;
     49 #if 0
     50 	struct vga_config *sc_vc;	/* VGA configuration */
     51 #endif
     52 };
     53 
     54 int	vga_isa_match __P((struct device *, struct cfdata *, void *));
     55 void	vga_isa_attach __P((struct device *, struct device *, void *));
     56 
     57 struct cfattach vga_isa_ca = {
     58 	sizeof(struct vga_isa_softc), vga_isa_match, vga_isa_attach,
     59 };
     60 
     61 int
     62 vga_isa_match(parent, match, aux)
     63 	struct device *parent;
     64 	struct cfdata *match;
     65 	void *aux;
     66 {
     67 	struct isa_attach_args *ia = aux;
     68 	int rv;
     69 
     70 	/* If values are hardwired to something that they can't be, punt. */
     71 	if (ia->ia_iobase != IOBASEUNK || /* ia->ia_iosize != 0 || XXX isa.c */
     72 	    (ia->ia_maddr != MADDRUNK && ia->ia_maddr != 0xb8000) ||
     73 	    (ia->ia_msize != 0 && ia->ia_msize != 0x8000) ||
     74 	    ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
     75 		return (0);
     76 
     77 	if (vga_is_console(ia->ia_iot, WSDISPLAY_TYPE_ISAVGA))
     78 		rv = 2; /* more than generic pcdisplay */
     79 	else
     80 		rv = vga_common_probe(ia->ia_iot, ia->ia_memt);
     81 
     82 	if (rv) {
     83 		ia->ia_iobase = 0x3b0;
     84 		ia->ia_iosize = 0x30;
     85 		ia->ia_maddr = 0xb8000;
     86 		ia->ia_msize = 0x8000;
     87 	}
     88 	return (rv);
     89 }
     90 
     91 void
     92 vga_isa_attach(parent, self, aux)
     93 	struct device *parent, *self;
     94 	void *aux;
     95 {
     96 	struct isa_attach_args *ia = aux;
     97 #if 0
     98 	struct vga_isa_softc *sc = (struct vga_isa_softc *)self;
     99 #endif
    100 
    101 	printf("\n");
    102 
    103 	vga_common_attach(self, ia->ia_iot, ia->ia_memt,
    104 			  WSDISPLAY_TYPE_ISAVGA);
    105 }
    106 
    107 int
    108 vga_isa_cnattach(iot, memt)
    109 	bus_space_tag_t iot, memt;
    110 {
    111 	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
    112 }
    113