xref: /netbsd-src/sys/arch/shark/ofw/vga_ofbus.c (revision 0df165c04d0a9ca1adde9ed2b890344c937954a6)
1 /* $NetBSD: vga_ofbus.c,v 1.12 2007/10/28 18:01:55 jmmv 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/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: vga_ofbus.c,v 1.12 2007/10/28 18:01:55 jmmv Exp $");
32 
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/device.h>
37 #include <sys/malloc.h>
38 
39 #include <dev/isa/isavar.h>
40 
41 #include <dev/ic/mc6845reg.h>
42 #include <dev/ic/pcdisplayvar.h>
43 #include <dev/ic/vgareg.h>
44 #include <dev/ic/vgavar.h>
45 
46 #include <dev/wscons/wsconsio.h>
47 #include <dev/wscons/wsdisplayvar.h>
48 
49 #include <dev/ofw/openfirm.h>
50 
51 #include <shark/ofw/vga_ofbusvar.h>
52 
53 struct vga_ofbus_softc {
54 	struct vga_softc sc_vga;
55 
56 	int sc_phandle;
57 };
58 
59 #if (NIGSFB_OFBUS > 0) || (NVGA_OFBUS > 0)
60 extern int console_ihandle;
61 #endif
62 
63 int	vga_ofbus_match (struct device *, struct cfdata *, void *);
64 void	vga_ofbus_attach (struct device *, struct device *, void *);
65 
66 CFATTACH_DECL(vga_ofbus, sizeof(struct vga_ofbus_softc),
67     vga_ofbus_match, vga_ofbus_attach, NULL, NULL);
68 
69 static const char *compat_strings[] = { "pnpPNP,900", 0 };
70 
71 int
72 vga_ofbus_match(struct device *parent, struct cfdata *match, void *aux)
73 {
74 	struct ofbus_attach_args *oba = aux;
75 
76 	if (of_compatible(oba->oba_phandle, compat_strings) == -1)
77 		return (0);
78 
79 	if (!vga_is_console(&isa_io_bs_tag, WSDISPLAY_TYPE_ISAVGA) &&
80 	    !vga_common_probe(&isa_io_bs_tag, &isa_mem_bs_tag))
81 		return (0);
82 
83 	return (2);	/* more than generic pcdisplay */
84 }
85 
86 void
87 vga_ofbus_attach(struct device *parent, struct device *self, void *aux)
88 {
89 	struct vga_ofbus_softc *osc = (void *) self;
90 	struct vga_softc *sc = &osc->sc_vga;
91 	struct ofbus_attach_args *oba = aux;
92 
93 	printf("\n");
94 	osc->sc_phandle = oba->oba_phandle;
95 
96 	vga_common_attach(sc, &isa_io_bs_tag, &isa_mem_bs_tag,
97 	    WSDISPLAY_TYPE_ISAVGA, 0, NULL);
98 }
99 
100 int
101 vga_ofbus_cnattach(bus_space_tag_t iot, bus_space_tag_t memt)
102 {
103 	int chosen_phandle;
104 	int stdout_ihandle, stdout_phandle, ret;
105 	char buf[128];
106 
107 	stdout_phandle = 0;
108 
109 	/*
110 	 * Find out whether the firmware's chosen stdout is
111 	 * a display.  If so, use the existing ihandle so the firmware
112 	 * doesn't become Unhappy.  If not, just open it.
113 	 */
114 	if ((chosen_phandle = OF_finddevice("/chosen")) == -1 ||
115 	    OF_getprop(chosen_phandle, "stdout", &stdout_ihandle,
116 	    sizeof(stdout_ihandle)) != sizeof(stdout_ihandle)) {
117 		return ENXIO;
118 	}
119 	stdout_ihandle = of_decode_int((unsigned char *)&stdout_ihandle);
120 	if ((stdout_phandle = OF_instance_to_package(stdout_ihandle)) == -1 ||
121 	    OF_getprop(stdout_phandle, "device_type", buf, sizeof(buf)) <= 0) {
122 		return ENXIO;
123 	}
124 
125 	if (strcmp(buf, "display") != 0) {
126 		/* The display is not stdout device. */
127 		return ENXIO;
128 	}
129 
130 	if (OF_call_method("text-mode3", stdout_ihandle, 0, 0) != 0) {
131 		printf("vga_ofbus_match: text-mode3 method invocation on VGA "
132 		       "screen device failed\n");
133 	}
134 
135 	ret = vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1);
136 #if (NIGSFB_OFBUS > 0) || (NVGA_OFBUS > 0)
137 	if (ret == 0)
138 		console_ihandle = stdout_ihandle;
139 #endif
140 
141 	return ret;
142 }
143