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kernel/linux-imx6_3.14.28/include/linux/firmware.h 1.96 KB
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  #ifndef _LINUX_FIRMWARE_H
  #define _LINUX_FIRMWARE_H
  
  #include <linux/types.h>
  #include <linux/compiler.h>
  #include <linux/gfp.h>
  
  #define FW_ACTION_NOHOTPLUG 0
  #define FW_ACTION_HOTPLUG 1
  
  struct firmware {
  	size_t size;
  	const u8 *data;
  	struct page **pages;
  
  	/* firmware loader private fields */
  	void *priv;
  };
  
  struct module;
  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, bool uevent,
  	const char *name, struct device *device, gfp_t gfp, 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, bool uevent,
  	const char *name, struct device *device, gfp_t gfp, void *context,
  	void (*cont)(const struct firmware *fw, void *context))
  {
  	return -EINVAL;
  }
  
  static inline void release_firmware(const struct firmware *fw)
  {
  }
  
  #endif
  
  #ifdef CONFIG_FW_LOADER_USER_HELPER
  int request_firmware_direct(const struct firmware **fw, const char *name,
  			    struct device *device);
  #else
  #define request_firmware_direct	request_firmware
  #endif
  
  #endif