1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_FIRMWARE_H 3 #define _LINUX_FIRMWARE_H 4 5 #include <linux/types.h> 6 #include <linux/compiler.h> 7 #include <linux/gfp.h> 8 9 #define FW_ACTION_NOHOTPLUG 0 10 #define FW_ACTION_HOTPLUG 1 11 12 struct firmware { 13 size_t size; 14 const u8 *data; 15 16 /* firmware loader private fields */ 17 void *priv; 18 }; 19 20 struct module; 21 struct device; 22 23 struct builtin_fw { 24 char *name; 25 void *data; 26 unsigned long size; 27 }; 28 29 /* We have to play tricks here much like stringify() to get the 30 __COUNTER__ macro to be expanded as we want it */ 31 #define __fw_concat1(x, y) x##y 32 #define __fw_concat(x, y) __fw_concat1(x, y) 33 34 #define DECLARE_BUILTIN_FIRMWARE(name, blob) \ 35 DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob)) 36 37 #define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size) \ 38 static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \ 39 __used __section(.builtin_fw) = { name, blob, size } 40 41 #if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE)) 42 int request_firmware(const struct firmware **fw, const char *name, 43 struct device *device); 44 int firmware_request_nowarn(const struct firmware **fw, const char *name, 45 struct device *device); 46 int firmware_request_platform(const struct firmware **fw, const char *name, 47 struct device *device); 48 int request_firmware_nowait( 49 struct module *module, bool uevent, 50 const char *name, struct device *device, gfp_t gfp, void *context, 51 void (*cont)(const struct firmware *fw, void *context)); 52 int request_firmware_direct(const struct firmware **fw, const char *name, 53 struct device *device); 54 int request_firmware_into_buf(const struct firmware **firmware_p, 55 const char *name, struct device *device, void *buf, size_t size); 56 57 void release_firmware(const struct firmware *fw); 58 #else 59 static inline int request_firmware(const struct firmware **fw, 60 const char *name, 61 struct device *device) 62 { 63 return -EINVAL; 64 } 65 66 static inline int firmware_request_nowarn(const struct firmware **fw, 67 const char *name, 68 struct device *device) 69 { 70 return -EINVAL; 71 } 72 73 static inline int firmware_request_platform(const struct firmware **fw, 74 const char *name, 75 struct device *device) 76 { 77 return -EINVAL; 78 } 79 80 static inline int request_firmware_nowait( 81 struct module *module, bool uevent, 82 const char *name, struct device *device, gfp_t gfp, void *context, 83 void (*cont)(const struct firmware *fw, void *context)) 84 { 85 return -EINVAL; 86 } 87 88 static inline void release_firmware(const struct firmware *fw) 89 { 90 } 91 92 static inline int request_firmware_direct(const struct firmware **fw, 93 const char *name, 94 struct device *device) 95 { 96 return -EINVAL; 97 } 98 99 static inline int request_firmware_into_buf(const struct firmware **firmware_p, 100 const char *name, struct device *device, void *buf, size_t size) 101 { 102 return -EINVAL; 103 } 104 105 #endif 106 107 int firmware_request_cache(struct device *device, const char *name); 108 109 #endif 110