xref: /netbsd-src/sys/arch/mac68k/obio/grf_obio.c (revision 84d0ab551791493d2630bbef27063a9d514b9108)
1 /*	$NetBSD: grf_obio.c,v 1.25 1997/10/08 19:54:04 briggs Exp $	*/
2 
3 /*
4  * Copyright (c) 1995 Allen Briggs.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *	This product includes software developed by Allen Briggs.
17  * 4. The name of the author may not be used to endorse or promote products
18  *    derived from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 /*
32  * Graphics display driver for the Macintosh internal video for machines
33  * that don't map it into a fake nubus card.
34  */
35 
36 #include <sys/param.h>
37 
38 #include <sys/device.h>
39 #include <sys/ioctl.h>
40 #include <sys/file.h>
41 #include <sys/malloc.h>
42 #include <sys/mman.h>
43 #include <sys/proc.h>
44 #include <sys/systm.h>
45 
46 #include <machine/autoconf.h>
47 #include <machine/bus.h>
48 #include <machine/cpu.h>
49 #include <machine/grfioctl.h>
50 #include <machine/viareg.h>
51 
52 #include <mac68k/dev/nubus.h>
53 #include <mac68k/dev/obiovar.h>
54 #include <mac68k/dev/grfvar.h>
55 
56 extern u_int32_t	mac68k_vidlog;
57 extern u_int32_t	mac68k_vidphys;
58 extern long		videorowbytes;
59 extern long		videobitdepth;
60 extern u_long		videosize;
61 
62 static int	grfiv_mode __P((struct grf_softc *gp, int cmd, void *arg));
63 static caddr_t	grfiv_phys __P((struct grf_softc *gp));
64 static int	grfiv_match __P((struct device *, struct cfdata *, void *));
65 static void	grfiv_attach __P((struct device *, struct device *, void *));
66 
67 struct cfdriver intvid_cd = {
68 	NULL, "intvid", DV_DULL
69 };
70 
71 struct cfattach intvid_ca = {
72 	sizeof(struct grfbus_softc), grfiv_match, grfiv_attach
73 };
74 
75 #define QUADRA_DAFB_BASE	0xF9800000
76 #define CIVIC_CONTROL_BASE	0x50036000
77 
78 static int
79 grfiv_match(parent, cf, aux)
80 	struct device *parent;
81 	struct cfdata *cf;
82 	void *aux;
83 {
84 	struct obio_attach_args *oa = (struct obio_attach_args *)aux;
85 	bus_space_handle_t bsh;
86 	int found, sense;
87 
88 	found = 1;
89 
90         switch (current_mac_model->class) {
91 	case MACH_CLASSQ:
92 	case MACH_CLASSQ2:
93 		/*
94 		 * Assume DAFB for all of these, unless we can't
95 		 * access the memory.
96 		 */
97 
98 		if (bus_space_map(oa->oa_tag, QUADRA_DAFB_BASE, 0x1000,
99 					0, &bsh)) {
100 			panic("failed to map space for DAFB regs.\n");
101 		}
102 
103 		if (bus_probe(oa->oa_tag, bsh, 0x1C, 4) == 0) {
104 			bus_space_unmap(oa->oa_tag, bsh, 0x1000);
105 			found = 0;
106 			goto nodafb;
107 		}
108 
109 		sense = (bus_space_read_4(oa->oa_tag, bsh, 0x1C) & 7);
110 
111 		if (sense == 0)
112 			found = 0;
113 
114 		/* Set "Turbo SCSI" configuration to default */
115 		bus_space_write_4(oa->oa_tag, bsh, 0x24, 0x1d1); /* ch0 */
116 		bus_space_write_4(oa->oa_tag, bsh, 0x28, 0x1d1); /* ch1 */
117 
118 		/* Disable interrupts */
119 		bus_space_write_4(oa->oa_tag, bsh, 0x104, 0);
120 
121 		/* Clear any interrupts */
122 		bus_space_write_4(oa->oa_tag, bsh, 0x10C, 0);
123 		bus_space_write_4(oa->oa_tag, bsh, 0x110, 0);
124 		bus_space_write_4(oa->oa_tag, bsh, 0x114, 0);
125 
126 		bus_space_unmap(oa->oa_tag, bsh, 0x1000);
127 		break;
128 
129         case MACH_CLASSAV:
130 		if (bus_space_map(oa->oa_tag, CIVIC_CONTROL_BASE, 0x1000,
131 					0, &bsh)) {
132 			panic("failed to map space for CIVIC control regs.\n");
133 		}
134 		/* Disable interrupts */
135 		bus_space_write_1(oa->oa_tag, bsh, 0x120, 0);
136 		bus_space_unmap(oa->oa_tag, bsh, 0x1000);
137 		break;
138 
139 	default:
140 nodafb:
141 		if (mac68k_vidlog == 0) {
142 			found = 0;
143 		}
144 		break;
145 	}
146 
147 	return found;
148 }
149 
150 #define R4(sc, o) (bus_space_read_4((sc)->sc_tag, (sc)->sc_regh, o) & 0xfff)
151 
152 static void
153 grfiv_attach(parent, self, aux)
154 	struct device *parent, *self;
155 	void   *aux;
156 {
157 	struct obio_attach_args *oa = (struct obio_attach_args *)aux;
158 	struct grfbus_softc *sc;
159 	struct grfmode *gm;
160 
161 	sc = (struct grfbus_softc *)self;
162 
163 	sc->card_id = 0;
164 
165         switch (current_mac_model->class) {
166         case MACH_CLASSQ:
167         case MACH_CLASSQ2:
168 		sc->sc_tag = oa->oa_tag;
169 		if (bus_space_map(sc->sc_tag, QUADRA_DAFB_BASE, 0x1000,
170 					0, &sc->sc_regh)) {
171 			panic("failed to map space for DAFB regs.\n");
172 		}
173 		printf(": DAFB: Monitor sense %x.\n", R4(sc,0x1C)&7);
174 		bus_space_unmap(sc->sc_tag, sc->sc_regh, 0x1000);
175 		break;
176 	default:
177 		printf(": Internal Video\n");
178 		break;
179 	}
180 
181 	gm = &(sc->curr_mode);
182 	gm->mode_id = 0;
183 	gm->psize = videobitdepth;
184 	gm->ptype = 0;
185 	gm->width = videosize & 0xffff;
186 	gm->height = (videosize >> 16) & 0xffff;
187 	gm->rowbytes = videorowbytes;
188 	gm->hres = 80;		/* XXX Hack */
189 	gm->vres = 80;		/* XXX Hack */
190 	gm->fbsize = gm->rowbytes * gm->height;
191 	gm->fbbase = (caddr_t)m68k_trunc_page(mac68k_vidlog);
192 	gm->fboff = mac68k_vidlog & PGOFSET;
193 
194 	/* Perform common video attachment. */
195 	grf_establish(sc, NULL, grfiv_mode, grfiv_phys);
196 }
197 
198 static int
199 grfiv_mode(sc, cmd, arg)
200 	struct grf_softc *sc;
201 	int cmd;
202 	void *arg;
203 {
204 	switch (cmd) {
205 	case GM_GRFON:
206 	case GM_GRFOFF:
207 		return 0;
208 	case GM_CURRMODE:
209 		break;
210 	case GM_NEWMODE:
211 		break;
212 	case GM_LISTMODES:
213 		break;
214 	}
215 	return EINVAL;
216 }
217 
218 static caddr_t
219 grfiv_phys(gp)
220 	struct grf_softc *gp;
221 {
222 	/*
223 	 * If we're using IIsi or similar, this will be 0.
224 	 * If we're using IIvx or similar, this will be correct.
225 	 */
226 	return (caddr_t)mac68k_vidphys;
227 }
228