2 * Copyright (c) 2003 Jake Burkholder.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
34 #include <sys/errno.h>
35 #include <sys/fcntl.h>
36 #include <sys/ioccom.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
41 #include <dev/ofw/openfirm.h>
42 #include <dev/ofw/openpromio.h>
45 * This provides a Solaris compatible character device interface to
46 * Open Firmware. It exists entirely for compatibility with software
47 * like X11, and only the features that are actually needed for that
48 * are implemented. The interface sucks too much to actually use,
49 * new code should use the /dev/openfirm device.
52 static d_open_t openprom_open;
53 static d_close_t openprom_close;
54 static d_ioctl_t openprom_ioctl;
56 static int openprom_modevent(module_t mode, int type, void *data);
57 static int openprom_node_valid(phandle_t node);
58 static int openprom_node_search(phandle_t root, phandle_t node);
60 static struct cdevsw openprom_cdevsw = {
61 .d_version = D_VERSION,
62 .d_flags = D_NEEDGIANT,
63 .d_open = openprom_open,
64 .d_close = openprom_close,
65 .d_ioctl = openprom_ioctl,
69 static int openprom_is_open;
70 static struct cdev *openprom_dev;
71 static phandle_t openprom_node;
74 openprom_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
77 if (openprom_is_open != 0)
84 openprom_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
92 openprom_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags,
95 struct openpromio *oprom;
104 if ((flags & FREAD) == 0)
112 if (data == NULL || *(void **)data == NULL)
114 oprom = *(void **)data;
115 error = copyin(&oprom->oprom_size, &len, sizeof(len));
118 if (len != sizeof(node)) {
122 error = copyin(&oprom->oprom_array, &node, sizeof(node));
125 error = openprom_node_valid(node);
130 node = OF_child(node);
133 node = OF_peer(node);
136 error = copyout(&node, &oprom->oprom_array, sizeof(node));
139 openprom_node = node;
143 if (data == NULL || *(void **)data == NULL)
145 oprom = *(void **)data;
146 error = copyin(&oprom->oprom_size, &len, sizeof(len));
149 if (len > OPROMMAXPARAM) {
153 prop = malloc(len, M_TEMP, M_WAITOK | M_ZERO);
158 error = copyinstr(&oprom->oprom_array, prop, len, &done);
161 buf = malloc(OPROMMAXPARAM, M_TEMP, M_WAITOK | M_ZERO);
166 node = openprom_node;
169 proplen = OF_getproplen(node, prop);
170 if (proplen > OPROMMAXPARAM) {
174 error = OF_getprop(node, prop, buf, proplen);
177 error = OF_nextprop(node, prop, buf);
178 proplen = strlen(buf);
182 error = copyout(&proplen, &oprom->oprom_size,
185 error = copyout(buf, &oprom->oprom_array,
204 openprom_node_valid(phandle_t node)
209 return (openprom_node_search(OF_peer(0), node));
213 openprom_node_search(phandle_t root, phandle_t node)
219 for (child = OF_child(root); child != 0 && child != -1;
220 child = OF_peer(child))
221 if (openprom_node_search(child, node) == 0)
227 openprom_modevent(module_t mode, int type, void *data)
232 openprom_dev = make_dev(&openprom_cdevsw, 0, UID_ROOT,
233 GID_WHEEL, 0600, "openprom");
236 destroy_dev(openprom_dev);
243 DEV_MODULE(openprom, openprom_modevent, NULL);