1 /* $NetBSD: genfb_sbus.c,v 1.11 2014/07/24 21:35:13 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2007 Michael Lorenz
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /* an SBus frontend for the generic fb console driver */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: genfb_sbus.c,v 1.11 2014/07/24 21:35:13 riastradh Exp $");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/buf.h>
37 #include <sys/device.h>
38 #include <sys/ioctl.h>
39 #include <sys/conf.h>
40
41 #include <uvm/uvm.h>
42
43 #include <sys/bus.h>
44 #include <machine/autoconf.h>
45 #include <machine/pmap.h>
46
47 #include <dev/sbus/sbusvar.h>
48 #include <dev/sun/fbio.h>
49 #include <dev/sun/fbvar.h>
50
51 #include <dev/wsfb/genfbvar.h>
52
53 struct genfb_sbus_softc {
54 struct genfb_softc sc_gen;
55 bus_space_tag_t sc_tag;
56 paddr_t sc_paddr;
57 };
58
59 static int genfb_match_sbus(device_t, cfdata_t, void *);
60 static void genfb_attach_sbus(device_t, device_t, void *);
61 static int genfb_ioctl_sbus(void *, void *, u_long, void *, int,
62 struct lwp*);
63 static paddr_t genfb_mmap_sbus(void *, void *, off_t, int);
64
65 CFATTACH_DECL_NEW(genfb_sbus, sizeof(struct genfb_sbus_softc),
66 genfb_match_sbus, genfb_attach_sbus, NULL, NULL);
67
68 /*
69 * Match a graphics device.
70 */
71 static int
genfb_match_sbus(device_t parent,cfdata_t cf,void * aux)72 genfb_match_sbus(device_t parent, cfdata_t cf, void *aux)
73 {
74 struct sbus_attach_args *sa = aux;
75
76 /* if there's no address property we can't use the device */
77 if (prom_getpropint(sa->sa_node, "address", -1) == -1)
78 return 0;
79 if (strcmp("display", prom_getpropstring(sa->sa_node, "device_type"))
80 == 0)
81 return 1;
82
83 return 0;
84 }
85
86 /*
87 * Attach a display. We need to notice if it is the console, too.
88 */
89 static void
genfb_attach_sbus(device_t parent,device_t self,void * args)90 genfb_attach_sbus(device_t parent, device_t self, void *args)
91 {
92 struct genfb_sbus_softc *sc = device_private(self);
93 struct sbus_attach_args *sa = args;
94 static const struct genfb_ops zero_ops;
95 struct genfb_ops ops = zero_ops;
96 prop_dictionary_t dict;
97 bus_space_handle_t bh;
98 paddr_t fbpa;
99 vaddr_t fbva;
100 int node = sa->sa_node;
101 int isconsole;
102
103 aprint_normal("\n");
104 sc->sc_gen.sc_dev = self;
105 /* Remember cookies for genfb_mmap_sbus() */
106 sc->sc_tag = sa->sa_bustag;
107 sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset);
108
109 /* read geometry information from the device tree */
110 sc->sc_gen.sc_width = prom_getpropint(sa->sa_node, "width", 1152);
111 sc->sc_gen.sc_height = prom_getpropint(sa->sa_node, "height", 900);
112 sc->sc_gen.sc_depth = prom_getpropint(sa->sa_node, "depth", 8);
113 sc->sc_gen.sc_stride = prom_getpropint(sa->sa_node, "linebytes",
114 (sc->sc_gen.sc_width * sc->sc_gen.sc_depth + 7) >> 3 );
115 sc->sc_gen.sc_fbsize = sc->sc_gen.sc_height * sc->sc_gen.sc_stride;
116 fbva = (uint32_t)prom_getpropint(sa->sa_node, "address", 0);
117 if (fbva == 0)
118 panic("this fb has no address property\n");
119 aprint_normal_dev(self, "%d x %d at %d bit\n",
120 sc->sc_gen.sc_width, sc->sc_gen.sc_height, sc->sc_gen.sc_depth);
121
122 pmap_extract(pmap_kernel(), fbva, &fbpa);
123 sc->sc_gen.sc_fboffset = (fbpa & 0x01ffffff) -
124 (sc->sc_paddr & 0x01ffffff);
125 aprint_normal_dev(self, "framebuffer at offset 0x%x\n",
126 (uint32_t)sc->sc_gen.sc_fboffset);
127
128 #if notyet
129 if (sc->sc_gen.sc_depth <= 8) {
130 /* setup some ANSIish colour map */
131 char boo[256];
132 snprintf(boo, 256, "\" pal!\" %x %x %x %x %x call",
133 sa->sa_node, 0, 0xa0, 0xa0, 0);
134 prom_interpret(boo);
135 }
136 #endif
137
138 isconsole = fb_is_console(node);
139 dict = device_properties(self);
140 prop_dictionary_set_bool(dict, "is_console", isconsole);
141
142 if (sbus_bus_map(sa->sa_bustag,
143 sa->sa_slot,
144 sa->sa_offset + sc->sc_gen.sc_fboffset,
145 sc->sc_gen.sc_fbsize,
146 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
147 aprint_error_dev(self, "cannot map framebuffer\n");
148 return;
149 }
150 sc->sc_gen.sc_fbaddr = (void *)bus_space_vaddr(sa->sa_bustag, bh);
151
152 ops.genfb_ioctl = genfb_ioctl_sbus;
153 ops.genfb_mmap = genfb_mmap_sbus;
154
155 genfb_attach(&sc->sc_gen, &ops);
156 }
157
158 static int
genfb_ioctl_sbus(void * v,void * vs,u_long cmd,void * data,int flag,struct lwp * l)159 genfb_ioctl_sbus(void *v, void *vs, u_long cmd, void *data, int flag,
160 struct lwp *l)
161 {
162
163 switch (cmd) {
164 case WSDISPLAYIO_GTYPE:
165 *(u_int *)data = WSDISPLAY_TYPE_GENFB;
166 return 0;
167 }
168
169 return EPASSTHROUGH;
170 }
171
172 static paddr_t
genfb_mmap_sbus(void * v,void * vs,off_t offset,int prot)173 genfb_mmap_sbus(void *v, void *vs, off_t offset, int prot)
174 {
175 struct genfb_sbus_softc *sc = v;
176
177 /* regular fb mapping at 0 */
178 if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize)) {
179
180 return bus_space_mmap(sc->sc_tag, sc->sc_paddr,
181 sc->sc_gen.sc_fboffset + offset, prot,
182 BUS_SPACE_MAP_LINEAR);
183 }
184
185 return -1;
186 }
187