1 /*-
2 * Copyright (c) 2012-2013 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/bus.h>
36 #include <sys/condvar.h>
37 #include <sys/conf.h>
38 #include <sys/consio.h> /* struct vt_mode */
39 #include <sys/fbio.h> /* video_adapter_t */
40 #include <sys/kernel.h>
41 #include <sys/lock.h>
42 #include <sys/malloc.h>
43 #include <sys/module.h>
44 #include <sys/mutex.h>
45 #include <sys/rman.h>
46 #include <sys/systm.h>
47
48 #include <machine/bus.h>
49 #include <machine/resource.h>
50
51 #include <dev/fdt/fdt_common.h>
52 #include <dev/ofw/openfirm.h>
53 #include <dev/ofw/ofw_bus.h>
54 #include <dev/ofw/ofw_bus_subr.h>
55
56 #include <dev/terasic/mtl/terasic_mtl.h>
57
58 static int
terasic_mtl_fdt_probe(device_t dev)59 terasic_mtl_fdt_probe(device_t dev)
60 {
61
62 if (!ofw_bus_status_okay(dev))
63 return (ENXIO);
64
65 if (ofw_bus_is_compatible(dev, "sri-cambridge,mtl")) {
66 device_set_desc(dev, "Terasic Multi-touch LCD (MTL)");
67 return (BUS_PROBE_DEFAULT);
68 }
69 return (ENXIO);
70 }
71
72 static int
terasic_mtl_fdt_attach(device_t dev)73 terasic_mtl_fdt_attach(device_t dev)
74 {
75 struct terasic_mtl_softc *sc;
76 int error;
77
78 sc = device_get_softc(dev);
79 sc->mtl_dev = dev;
80 sc->mtl_unit = device_get_unit(dev);
81
82 /*
83 * FDT allows multiple memory resources to be defined for a device;
84 * query them in the order registers, pixel buffer, text buffer.
85 * However, we need to sanity-check that they are page-aligned and
86 * page-sized, so we may still abort.
87 */
88 sc->mtl_reg_rid = 0;
89 sc->mtl_reg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
90 &sc->mtl_reg_rid, RF_ACTIVE);
91 if (sc->mtl_reg_res == NULL) {
92 device_printf(dev, "couldn't map register memory\n");
93 error = ENXIO;
94 goto error;
95 }
96 if (rman_get_start(sc->mtl_reg_res) % PAGE_SIZE != 0) {
97 device_printf(dev, "improper register address");
98 error = ENXIO;
99 goto error;
100 }
101 if (rman_get_size(sc->mtl_reg_res) % PAGE_SIZE != 0) {
102 device_printf(dev, "improper register size");
103 error = ENXIO;
104 goto error;
105 }
106 device_printf(sc->mtl_dev, "registers at mem %p-%p\n",
107 (void *)rman_get_start(sc->mtl_reg_res),
108 (void *)(rman_get_start(sc->mtl_reg_res) +
109 rman_get_size(sc->mtl_reg_res)));
110
111 sc->mtl_pixel_rid = 1;
112 sc->mtl_pixel_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
113 &sc->mtl_pixel_rid, RF_ACTIVE);
114 if (sc->mtl_pixel_res == NULL) {
115 device_printf(dev, "couldn't map pixel memory\n");
116 error = ENXIO;
117 goto error;
118 }
119 if (rman_get_start(sc->mtl_pixel_res) % PAGE_SIZE != 0) {
120 device_printf(dev, "improper pixel address");
121 error = ENXIO;
122 goto error;
123 }
124 if (rman_get_size(sc->mtl_pixel_res) % PAGE_SIZE != 0) {
125 device_printf(dev, "improper pixel size");
126 error = ENXIO;
127 goto error;
128 }
129 device_printf(sc->mtl_dev, "pixel frame buffer at mem %p-%p\n",
130 (void *)rman_get_start(sc->mtl_pixel_res),
131 (void *)(rman_get_start(sc->mtl_pixel_res) +
132 rman_get_size(sc->mtl_pixel_res)));
133
134 sc->mtl_text_rid = 2;
135 sc->mtl_text_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
136 &sc->mtl_text_rid, RF_ACTIVE);
137 if (sc->mtl_text_res == NULL) {
138 device_printf(dev, "couldn't map text memory\n");
139 error = ENXIO;
140 goto error;
141 }
142 if (rman_get_start(sc->mtl_text_res) % PAGE_SIZE != 0) {
143 device_printf(dev, "improper text address");
144 error = ENXIO;
145 goto error;
146 }
147 if (rman_get_size(sc->mtl_text_res) % PAGE_SIZE != 0) {
148 device_printf(dev, "improper text size");
149 error = ENXIO;
150 goto error;
151 }
152 device_printf(sc->mtl_dev, "text frame buffer at mem %p-%p\n",
153 (void *)rman_get_start(sc->mtl_text_res),
154 (void *)(rman_get_start(sc->mtl_text_res) +
155 rman_get_size(sc->mtl_text_res)));
156
157 error = terasic_mtl_attach(sc);
158 if (error == 0)
159 return (0);
160 error:
161 if (sc->mtl_text_res != NULL)
162 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_text_rid,
163 sc->mtl_text_res);
164 if (sc->mtl_pixel_res != NULL)
165 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_pixel_rid,
166 sc->mtl_pixel_res);
167 if (sc->mtl_reg_res != NULL)
168 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_reg_rid,
169 sc->mtl_reg_res);
170 return (error);
171 }
172
173 static int
terasic_mtl_fdt_detach(device_t dev)174 terasic_mtl_fdt_detach(device_t dev)
175 {
176 struct terasic_mtl_softc *sc;
177
178 sc = device_get_softc(dev);
179 terasic_mtl_detach(sc);
180 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_text_rid,
181 sc->mtl_text_res);
182 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_pixel_rid,
183 sc->mtl_pixel_res);
184 bus_release_resource(dev, SYS_RES_MEMORY, sc->mtl_reg_rid,
185 sc->mtl_reg_res);
186 return (0);
187 }
188
189 static device_method_t terasic_mtl_fdt_methods[] = {
190 DEVMETHOD(device_probe, terasic_mtl_fdt_probe),
191 DEVMETHOD(device_attach, terasic_mtl_fdt_attach),
192 DEVMETHOD(device_detach, terasic_mtl_fdt_detach),
193 { 0, 0 }
194 };
195
196 static driver_t terasic_mtl_fdt_driver = {
197 "terasic_mtl",
198 terasic_mtl_fdt_methods,
199 sizeof(struct terasic_mtl_softc),
200 };
201
202 DRIVER_MODULE(mtl, simplebus, terasic_mtl_fdt_driver, terasic_mtl_devclass, 0,
203 0);
204