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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 <string.h>
#include <glib.h>
#include <dlfcn.h>
#include <errno.h>
#include "device-internal.h"
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
static GList *dev_head;
static void *dlopen_handle;
const OEM_sys_devman_plugin_interface *oem_intf;
void add_device(const enum device_type *devtype)
{
dev_head = g_list_append(dev_head, (enum device_type *)devtype);
}
void remove_device(const enum device_type *devtype)
{
dev_head = g_list_remove(dev_head, (enum device_type *)devtype);
}
static enum device_type *find_device(enum device_type devtype)
{
GList *elem;
enum device_type *type;
for (elem = dev_head; elem; elem = elem->next) {
type = elem->data;
if (*type == devtype)
return type;
}
return NULL;
}
API int device_get_property(enum device_type devtype, int property, int *value)
{
struct device *dev;
enum device_type *type;
int r;
type = find_device(devtype);
if (type == NULL) {
_E("devtype cannot find");
errno = EPERM;
return -1;
}
dev = container_of(type, struct device, type);
if (dev->get_prop == NULL) {
_E("devtype doesn't have getter function");
errno = EPERM;
return -1;
}
r = dev->get_prop(property, value);
if (r == -ENODEV) {
_E("Not support driver");
errno = ENODEV;
return -1;
} else if (r == -1) {
_E("get_prop of %s(%d) return failes", dev->name, property);
errno = EPERM;
return -1;
}
errno = 0;
return 0;
}
API int device_set_property(enum device_type devtype, int property, int value)
{
enum device_type *type;
struct device *dev;
int r;
type = find_device(devtype);
if (type == NULL) {
_E("devtype cannot find");
errno = EPERM;
return -1;
}
dev = container_of(type, struct device, type);
if (dev->set_prop == NULL) {
_E("devtype doesn't have setter function");
errno = EPERM;
return -1;
}
r = dev->set_prop(property, value);
if (r == -ENODEV) {
_E("Not support driver");
errno = ENODEV;
return -1;
} else if (r == -1) {
_E("set_prop of %s(%d) return failes", dev->name, property);
errno = EPERM;
return -1;
}
errno = 0;
return 0;
}
static void __CONSTRUCTOR__ module_init(void)
{
const OEM_sys_devman_plugin_interface *(*OEM_sys_get_devman_plugin_interface) ();
char *error;
dlopen_handle = dlopen(DEVMAN_PLUGIN_PATH, RTLD_NOW);
if (!dlopen_handle) {
_E("dlopen() failed");
goto ERROR;
}
OEM_sys_get_devman_plugin_interface = dlsym(dlopen_handle, "OEM_sys_get_devman_plugin_interface");
if ((error = dlerror()) != NULL) {
_E("dlsym() failed: %s", error);
goto ERROR;
}
oem_intf = OEM_sys_get_devman_plugin_interface();
if (!oem_intf) {
_E("get_devman_plugin_interface() failed");
goto ERROR;
}
return;
ERROR:
if (dlopen_handle)
dlclose(dlopen_handle);
}
static void __DESTRUCTOR__ module_fini(void)
{
if (dlopen_handle)
dlclose(dlopen_handle);
}
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