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 struct page **pages; 16 17 /* firmware loader private fields */ 18 void *priv; 19 }; 20 21 struct module; 22 struct device; 23 24 struct builtin_fw { 25 char *name; 26 void *data; 27 unsigned long size; 28 }; 29 30 /* We have to play tricks here much like stringify() to get the 31 __COUNTER__ macro to be expanded as we want it */ 32 #define __fw_concat1(x, y) x##y 33 #define __fw_concat(x, y) __fw_concat1(x, y) 34 35 #define DECLARE_BUILTIN_FIRMWARE(name, blob) \ 36 DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob)) 37 38 #define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size) \ 39 static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \ 40 __used __section(.builtin_fw) = { name, blob, size } 41 42 #if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE)) 43 int request_firmware(const struct firmware **fw, const char *name, 44 struct device *device); 45 int request_firmware_nowait( 46 struct module *module, bool uevent, 47 const char *name, struct device *device, gfp_t gfp, void *context, 48 void (*cont)(const struct firmware *fw, void *context)); 49 int request_firmware_direct(const struct firmware **fw, const char *name, 50 struct device *device); 51 int request_firmware_into_buf(const struct firmware **firmware_p, 52 const char *name, struct device *device, void *buf, size_t size); 53 54 void release_firmware(const struct firmware *fw); 55 #else 56 static inline int request_firmware(const struct firmware **fw, 57 const char *name, 58 struct device *device) 59 { 60 return -EINVAL; 61 } 62 static inline int request_firmware_nowait( 63 struct module *module, bool uevent, 64 const char *name, struct device *device, gfp_t gfp, void *context, 65 void (*cont)(const struct firmware *fw, void *context)) 66 { 67 return -EINVAL; 68 } 69 70 static inline void release_firmware(const struct firmware *fw) 71 { 72 } 73 74 static inline int request_firmware_direct(const struct firmware **fw, 75 const char *name, 76 struct device *device) 77 { 78 return -EINVAL; 79 } 80 81 static inline int request_firmware_into_buf(const struct firmware **firmware_p, 82 const char *name, struct device *device, void *buf, size_t size) 83 { 84 return -EINVAL; 85 } 86 87 #endif 88 #endif 89