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/*
* device-node
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h>
#include "device-internal.h"
static int parent(pid_t pid)
{
int status;
/* wait for child */
if (waitpid(pid, &status, 0) != -1) {
/* terminated normally */
if (WIFEXITED(status)) {
_I("%d terminated by exit(%d)", pid, WEXITSTATUS(status));
return WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
_I("%d terminated by signal %d", pid, WTERMSIG(status));
} else if (WIFSTOPPED(status)) {
_I("%d stopped by signal %d", pid, WSTOPSIG(status));
}
} else {
_I("%d waitpid() failed : %s", pid, strerror(errno));
}
return -EAGAIN;
}
static void child(const char *argv[])
{
int i, r;
for (i = 0; i < _NSIG; ++i)
signal(i, SIG_DFL);
r = execv(argv[0], (char **)argv);
if (r < 0)
exit(EXIT_FAILURE);
}
int run_save_blenv(const char *extcon_path, const char *val)
{
pid_t pid;
struct sigaction act, oldact;
int r = -1;
const char *extcon_argv[4] = {"/usr/bin/save_blenv", NULL, NULL, NULL};
if (!extcon_path || !val)
return -EINVAL;
extcon_argv[1] = extcon_path;
extcon_argv[2] = val;
/* Use default signal handler */
act.sa_handler = SIG_DFL;
act.sa_sigaction = NULL;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
if (sigaction(SIGCHLD, &act, &oldact) < 0)
return -errno;
pid = fork();
if (pid < 0) {
_E("failed to fork");
r = -errno;
} else if (pid == 0) {
child(extcon_argv);
} else
r = parent(pid);
if (sigaction(SIGCHLD, &oldact, NULL) < 0)
_E("failed to restore sigaction");
return r;
}
static int extcon_get_prop(int prop, int *val)
{
switch (prop) {
case PROP_EXTCON_TA_ONLINE:
return PLUGIN_GET(jack_charger_online, val);
case PROP_EXTCON_EARJACK_ONLINE:
return PLUGIN_GET(jack_earjack_online, val);
case PROP_EXTCON_EARKEY_ONLINE:
return PLUGIN_GET(jack_earkey_online, val);
case PROP_EXTCON_HDMI_ONLINE:
return PLUGIN_GET(jack_hdmi_online, val);
case PROP_EXTCON_USB_ONLINE:
return PLUGIN_GET(jack_usb_online, val);
case PROP_EXTCON_CRADLE_ONLINE:
return PLUGIN_GET(jack_cradle_online, val);
case PROP_EXTCON_TVOUT_ONLINE:
return PLUGIN_GET(jack_tvout_online, val);
case PROP_EXTCON_KEYBOARD_ONLINE:
return PLUGIN_GET(jack_keyboard_online, val);
case PROP_EXTCON_HDMI_SUPPORT:
return PLUGIN_GET(hdmi_support, val);
case PROP_EXTCON_UART_PATH:
return PLUGIN_GET(uart_path, val);
case PROP_EXTCON_USB_PATH:
return PLUGIN_GET(usb_path, val);
}
return -1;
}
static int extcon_set_prop(int prop, int val)
{
int r;
switch (prop) {
case PROP_EXTCON_UART_PATH:
r = PLUGIN_SET(uart_path, val);
if (r == 0) {
if (val == PATH_CP)
r = run_save_blenv("uartpath", "CP");
else
r = run_save_blenv("uartpath", "AP");
}
return r;
case PROP_EXTCON_USB_PATH:
r = PLUGIN_SET(usb_path, val);
if (r == 0) {
if (val == PATH_CP)
r = run_save_blenv("usbpath", "CP");
else
r = run_save_blenv("usbpath", "AP");
}
return r;
}
return -1;
}
static const struct device extcon = {
.name = "extcon",
.set_prop = extcon_set_prop,
.get_prop = extcon_get_prop,
.type = DEVICE_TYPE_EXTCON,
};
static void __CONSTRUCTOR__ module_init(void)
{
add_device(&(extcon.type));
}
static void __DESTRUCTOR__ module_fini(void)
{
remove_device(&(extcon.type));
}
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