root/include/linux/firmware.h

INCLUDED FROM

DEFINITIONS

1. request_firmware
2. request_firmware_nowait
3. release_firmware

#ifndef _LINUX_FIRMWARE_H
#define _LINUX_FIRMWARE_H

#include <linux/module.h>
#include <linux/types.h>
#include <linux/compiler.h>

#define FIRMWARE_NAME_MAX 30 
#define FW_ACTION_NOHOTPLUG 0
#define FW_ACTION_HOTPLUG 1

struct firmware {
        size_t size;
        const u8 *data;
};

struct device;

struct builtin_fw {
        char *name;
        void *data;
        unsigned long size;
};

/* We have to play tricks here much like stringify() to get the
   __COUNTER__ macro to be expanded as we want it */
#define __fw_concat1(x, y) x##y
#define __fw_concat(x, y) __fw_concat1(x, y)

#define DECLARE_BUILTIN_FIRMWARE(name, blob)                                 \
        DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))

#define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size)                      \
        static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
        __used __section(.builtin_fw) = { name, blob, size }

#if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
int request_firmware(const struct firmware **fw, const char *name,
                     struct device *device);
int request_firmware_nowait(
        struct module *module, int uevent,
        const char *name, struct device *device, void *context,
        void (*cont)(const struct firmware *fw, void *context));

void release_firmware(const struct firmware *fw);
#else
static inline int request_firmware(const struct firmware **fw,
                                   const char *name,
                                   struct device *device)
{
        return -EINVAL;
}
static inline int request_firmware_nowait(
        struct module *module, int uevent,
        const char *name, struct device *device, void *context,
        void (*cont)(const struct firmware *fw, void *context))
{
        return -EINVAL;
}

static inline void release_firmware(const struct firmware *fw)
{
}
#endif

#endif