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
  11 struct firmware {
  12         size_t size;
  13         const u8 *data;
  14 };
  15
  16 struct device;
  17
  18 struct 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))
  37 int request_firmware(const struct firmware **fw, const char *name,
  38                      struct device *device);
  39 int 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
  44 void release_firmware(const struct firmware *fw);
  45 #else
  46 static inline int request_firmware(const struct firmware **fw,
  47                                    const char *name,
  48                                    struct device *device)
  49 {
  50         return -EINVAL;
  51 }
  52 static 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
  60 static inline void release_firmware(const struct firmware *fw)
  61 {
  62 }
  63 #endif
  64
  65 #endif