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/*
* Copyright (c) 2015-2016 Intel Corporation.
*
* 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 <device.h>
#include <misc/util.h>
extern struct device __device_init_start[];
extern struct device __device_PRIMARY_start[];
extern struct device __device_SECONDARY_start[];
extern struct device __device_NANOKERNEL_start[];
extern struct device __device_MICROKERNEL_start[];
extern struct device __device_APPLICATION_start[];
extern struct device __device_init_end[];
static struct device *config_levels[] = {
__device_PRIMARY_start,
__device_SECONDARY_start,
__device_NANOKERNEL_start,
__device_MICROKERNEL_start,
__device_APPLICATION_start,
__device_init_end,
};
/**
* @brief Execute all the device initialization functions at a given level
*
* @details Invokes the initialization routine for each device object
* created by the DEVICE_INIT() macro using the specified level.
* The linker script places the device objects in memory in the order
* they need to be invoked, with symbols indicating where one level leaves
* off and the next one begins.
*
* @param level init level to run.
*/
void _sys_device_do_config_level(int level)
{
struct device *info;
for (info = config_levels[level]; info < config_levels[level+1]; info++) {
struct device_config *device = info->config;
device->init(info);
}
}
/**
* @brief Retrieve the device structure for a driver by name
*
* @details Device objects are created via the DEVICE_INIT() macro and
* placed in memory by the linker. If a driver needs to bind to another driver
* it can use this function to retrieve the device structure of the lower level
* driver by the name the driver exposes to the system.
*
* @param name device name to search for.
*
* @return pointer to device structure, or NULL if not found.
*/
struct device *device_get_binding(char *name)
{
struct device *info;
for (info = __device_init_start; info != __device_init_end; info++) {
if (!strcmp(name, info->config->name)) {
return info;
}
}
return NULL;
}
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