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/*
* Copyright (c) 2015-2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <string.h>
#include <device.h>
#include <misc/util.h>
#include <atomic.h>
extern struct device __device_init_start[];
extern struct device __device_PRE_KERNEL_1_start[];
extern struct device __device_PRE_KERNEL_2_start[];
extern struct device __device_POST_KERNEL_start[];
extern struct device __device_APPLICATION_start[];
/* Deprecated */
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_init_end[];
static struct device *config_levels[] = {
__device_PRE_KERNEL_1_start,
__device_PRE_KERNEL_2_start,
__device_POST_KERNEL_start,
__device_APPLICATION_start,
/* Deprecated levels */
__device_PRIMARY_start,
__device_SECONDARY_start,
__device_NANOKERNEL_start,
__device_MICROKERNEL_start,
/* End marker */
__device_init_end,
};
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
struct device_pm_ops device_pm_ops_nop = {device_pm_nop, device_pm_nop};
extern uint32_t __device_busy_start[];
extern uint32_t __device_busy_end[];
#define DEVICE_BUSY_SIZE (__device_busy_end - __device_busy_start)
#endif
/**
* @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);
}
}
struct device *device_get_binding(const char *name)
{
struct device *info;
for (info = __device_init_start; info != __device_init_end; info++) {
if (info->driver_api && !strcmp(name, info->config->name)) {
return info;
}
}
return NULL;
}
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
int device_pm_nop(struct device *unused_device, int unused_policy)
{
return 0;
}
int device_pm_control_nop(struct device *unused_device,
uint32_t unused_ctrl_command, void *unused_context)
{
return 0;
}
void device_list_get(struct device **device_list, int *device_count)
{
*device_list = __device_init_start;
*device_count = __device_init_end - __device_init_start;
}
int device_any_busy_check(void)
{
int i = 0;
for (i = 0; i < DEVICE_BUSY_SIZE; i++) {
if (__device_busy_start[i] != 0) {
return -EBUSY;
}
}
return 0;
}
int device_busy_check(struct device *chk_dev)
{
if (atomic_test_bit((const atomic_t *)__device_busy_start,
(chk_dev - __device_init_start))) {
return -EBUSY;
}
return 0;
}
#endif
void device_busy_set(struct device *busy_dev)
{
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
atomic_set_bit((atomic_t *) __device_busy_start,
(busy_dev - __device_init_start));
#else
ARG_UNUSED(busy_dev);
#endif
}
void device_busy_clear(struct device *busy_dev)
{
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
atomic_clear_bit((atomic_t *) __device_busy_start,
(busy_dev - __device_init_start));
#else
ARG_UNUSED(busy_dev);
#endif
}
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