2 * firmware - Kernel firmware loader
4 * Copyright (C) 2009 Piter Punk <piterpunk@slackware.com>
5 * Copyright (C) 2009-2011 Kay Sievers <kay@vrfy.org>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details:*
25 #include <sys/utsname.h>
30 static bool set_loading(struct udev *udev, char *loadpath, const char *state) {
33 ldfile = fopen(loadpath, "we");
35 log_error("error: can not open '%s'", loadpath);
38 fprintf(ldfile, "%s\n", state);
43 static bool copy_firmware(struct udev *udev, const char *source, const char *target, size_t size) {
45 FILE *fsource = NULL, *ftarget = NULL;
50 log_error("No memory available to load firmware file");
54 log_debug("writing '%s' (%zi) to '%s'", source, size, target);
56 fsource = fopen(source, "re");
59 ftarget = fopen(target, "we");
62 if (fread(buf, size, 1, fsource) != 1)
64 if (fwrite(buf, size, 1, ftarget) == 1)
76 static FILE* find_firmware(const char *path, const char *fwpath, const char *firmware)
78 char searchpath[UTIL_PATH_SIZE];
84 srcdir = opendir(path);
85 while ((dent = readdir(srcdir)) != NULL) {
86 if (strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0)
88 if (fstatat(dirfd(srcdir), dent->d_name, &statbuf, 0) < 0)
90 if (S_ISDIR(statbuf.st_mode)) {
91 strscpyl(fwpath, UTIL_PATH_SIZE, path, dent->d_name, "/", firmware, NULL);
92 fwfile = fopen(fwpath, "re");
94 strscpyl(searchpath, UTIL_PATH_SIZE, path, dent->d_name, "/", NULL);
95 fwfile = find_firmware(searchpath, fwpath, firmware);
105 static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], bool test) {
106 struct udev *udev = udev_device_get_udev(dev);
107 static const char *searchpath[] = { FIRMWARE_PATH };
108 char loadpath[UTIL_PATH_SIZE];
109 char datapath[UTIL_PATH_SIZE];
110 char fwpath[UTIL_PATH_SIZE];
111 const char *firmware;
113 struct utsname kernel;
116 int rc = EXIT_SUCCESS;
118 firmware = udev_device_get_property_value(dev, "FIRMWARE");
119 if (firmware == NULL) {
120 log_error("firmware parameter missing");
125 /* lookup firmware file */
127 for (i = 0; i < ELEMENTSOF(searchpath); i++) {
128 strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL);
129 fwfile = fopen(fwpath, "re");
133 strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL);
134 fwfile = fopen(fwpath, "re");
140 /* If not found, try to find firmware in sub-directories. */
141 if (fwfile == NULL) {
142 for (i = 0; i < ELEMENTSOF(searchpath); i++) {
143 fwfile = find_firmware(searchpath[i], fwpath, firmware);
150 strscpyl(loadpath, sizeof(loadpath), udev_device_get_syspath(dev), "/loading", NULL);
152 if (fwfile == NULL) {
153 log_debug("did not find firmware file '%s'", firmware);
156 * Do not cancel the request in the initrd, the real root might have
157 * the firmware file and the 'coldplug' run in the real root will find
158 * this pending request and fulfill or cancel it.
161 set_loading(udev, loadpath, "-1");
165 if (stat(fwpath, &statbuf) < 0 || statbuf.st_size == 0) {
167 set_loading(udev, loadpath, "-1");
172 if (!set_loading(udev, loadpath, "1"))
175 strscpyl(datapath, sizeof(datapath), udev_device_get_syspath(dev), "/data", NULL);
176 if (!copy_firmware(udev, fwpath, datapath, statbuf.st_size)) {
177 log_error("error sending firmware '%s' to device", firmware);
178 set_loading(udev, loadpath, "-1");
183 set_loading(udev, loadpath, "0");
190 const struct udev_builtin udev_builtin_firmware = {
192 .cmd = builtin_firmware,
193 .help = "kernel firmware loader",