LXR linux/include/linux/firmware.h

   1#ifndef _LINUX_FIRMWARE_H
   2#define _LINUX_FIRMWARE_H
   3
   4#include <linux/module.h>
   5#include <linux/types.h>
   6#include <linux/compiler.h>
   7
   8#define FW_ACTION_NOHOTPLUG 0
   9#define FW_ACTION_HOTPLUG 1
  10
  11struct firmware {
  12        size_t size;
  13        const u8 *data;
  14};
  15
  16struct device;
  17
  18struct builtin_fw {
  19        char *name;
  20        void *data;
  21        unsigned long size;
  22};
  23
  24/* We have to play tricks here much like stringify() to get the
  25   __COUNTER__ macro to be expanded as we want it */
  26#define __fw_concat1(x, y) x##y
  27#define __fw_concat(x, y) __fw_concat1(x, y)
  28
  29#define DECLARE_BUILTIN_FIRMWARE(name, blob)                                 \
  30        DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
  31
  32#define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size)                      \
  33        static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
  34        __used __section(.builtin_fw) = { name, blob, size }
  35
  36#if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
  37int request_firmware(const struct firmware **fw, const char *name,
  38                     struct device *device);
  39int request_firmware_nowait(
  40        struct module *module, int uevent,
  41        const char *name, struct device *device, void *context,
  42        void (*cont)(const struct firmware *fw, void *context));
  43
  44void release_firmware(const struct firmware *fw);
  45#else
  46static inline int request_firmware(const struct firmware **fw,
  47                                   const char *name,
  48                                   struct device *device)
  49{
  50        return -EINVAL;
  51}
  52static inline int request_firmware_nowait(
  53        struct module *module, int uevent,
  54        const char *name, struct device *device, void *context,
  55        void (*cont)(const struct firmware *fw, void *context))
  56{
  57        return -EINVAL;
  58}
  59
  60static inline void release_firmware(const struct firmware *fw)
  61{
  62}
  63#endif
  64
  65#endif
  66