bebbc31b90
From: Bill Nottingham <notting@redhat.com> Changed reading of firmware blob to mmap and let firmware_helper follow the setting of the log level with UDEV_LOG.
148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/*
|
|
* A simple firmware helper program.
|
|
*
|
|
* Copyright 2005 Red Hat, Inc.
|
|
*
|
|
* This software may be freely redistributed under the terms of the GNU
|
|
* public license.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <unistd.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "../../udev_utils.h"
|
|
#include "../../logging.h"
|
|
|
|
#define FIRMWARE_PATH "/lib/firmware"
|
|
#define PATH_SIZE 256
|
|
|
|
#ifdef USE_LOG
|
|
void log_message(int priority, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
static int udev_log = -1;
|
|
|
|
if (udev_log == -1) {
|
|
const char *value;
|
|
|
|
value = getenv("UDEV_LOG");
|
|
if (value)
|
|
udev_log = log_priority(value);
|
|
else
|
|
udev_log = LOG_ERR;
|
|
}
|
|
|
|
if (priority > udev_log)
|
|
return;
|
|
|
|
va_start(args, format);
|
|
vsyslog(priority, format, args);
|
|
va_end(args);
|
|
}
|
|
#endif
|
|
|
|
/* Set the 'loading' attribute for a firmware device.
|
|
* 1 == currently loading
|
|
* 0 == done loading
|
|
* -1 == error
|
|
*/
|
|
static int set_loading(const char *device, int value) {
|
|
char loading_path[PATH_SIZE];
|
|
int rc;
|
|
FILE *f;
|
|
|
|
snprintf(loading_path, sizeof(loading_path), "/sys/%s/loading", device);
|
|
loading_path[sizeof(loading_path)-1] = '\0';
|
|
f = fopen(loading_path, "w");
|
|
if (!f)
|
|
return -1;
|
|
rc = fprintf(f, "%d", value);
|
|
fclose(f);
|
|
if (rc < 0)
|
|
return rc;
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
char *devpath, *firmware, *action, *driver;
|
|
char fw_path[PATH_SIZE];
|
|
char data_path[PATH_SIZE];
|
|
int fw_fd;
|
|
char *fw_buffer;
|
|
size_t fw_buffer_size;
|
|
size_t count;
|
|
int rc = 0;
|
|
|
|
logging_init("firmware_helper");
|
|
|
|
driver = getenv("PHYSDEVDRIVER");
|
|
if (!driver)
|
|
driver = "(unknown)";
|
|
devpath = getenv("DEVPATH");
|
|
firmware = getenv("FIRMWARE");
|
|
action = getenv("ACTION");
|
|
if (!devpath || !firmware || !action || strcmp(action,"add") != 0) {
|
|
err("missing devpath, action or firmware");
|
|
exit(1);
|
|
}
|
|
|
|
dbg("try to load firmware '%s' for '%s'", firmware, devpath);
|
|
set_loading(devpath, 1);
|
|
|
|
snprintf(fw_path, sizeof(fw_path), "%s/%s", FIRMWARE_PATH, firmware);
|
|
fw_path[sizeof(fw_path)-1] = '\0';
|
|
if (file_map(fw_path, &fw_buffer, &fw_buffer_size) != 0 || fw_buffer_size == 0) {
|
|
err("could not load firmware '%s' for '%s'", fw_path, devpath);
|
|
fw_buffer = NULL;
|
|
goto out_err;
|
|
}
|
|
|
|
snprintf(data_path, sizeof(data_path), "/sys/%s/data", devpath);
|
|
fw_path[sizeof(data_path)-1] = '\0';
|
|
fw_fd = open(data_path, O_RDWR);
|
|
if (fw_fd < 0) {
|
|
rc = errno;
|
|
goto out_err;
|
|
}
|
|
|
|
count = 0;
|
|
while (count < fw_buffer_size) {
|
|
int c;
|
|
|
|
c = write(fw_fd, fw_buffer+count, fw_buffer_size);
|
|
if (c <= 0) {
|
|
rc = errno;
|
|
close(fw_fd);
|
|
goto out_err;
|
|
}
|
|
count += c;
|
|
}
|
|
|
|
close(fw_fd);
|
|
file_unmap(fw_buffer, fw_buffer_size);
|
|
set_loading(devpath, 0);
|
|
info("loaded '%s' for device '%s'", fw_path, devpath);
|
|
logging_close();
|
|
return 0;
|
|
|
|
out_err:
|
|
if (fw_buffer)
|
|
file_unmap(fw_buffer, fw_buffer_size);
|
|
set_loading(devpath, -1);
|
|
|
|
err("error loading '%s' for device '%s' with driver '%s'", fw_path, devpath, driver);
|
|
logging_close();
|
|
return rc;
|
|
}
|