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@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
47struct vga_isa_softc {
48	struct device sc_dev;
49#if 0
50	struct vga_config *sc_vc;	/* VGA configuration */
51#endif
52};
53
54int	vga_isa_match __P((struct device *, struct cfdata *, void *));
55void	vga_isa_attach __P((struct device *, struct device *, void *));
56
57struct cfattach vga_isa_ca = {
58	sizeof(struct vga_isa_softc), vga_isa_match, vga_isa_attach,
59};
60
61int
62vga_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
91void
92vga_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
107int
108vga_isa_cnattach(iot, memt)
109	bus_space_tag_t iot, memt;
110{
111	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
112}
113