Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_FIRMWARE_H
2#define _LINUX_FIRMWARE_H
3
4#include <linux/types.h>
5#include <linux/compiler.h>
6#include <linux/gfp.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 struct page **pages;
15
16 /* firmware loader private fields */
17 void *priv;
18};
19
20struct module;
21struct device;
22
23struct 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))
42int request_firmware(const struct firmware **fw, const char *name,
43 struct device *device);
44int request_firmware_nowait(
45 struct module *module, bool uevent,
46 const char *name, struct device *device, gfp_t gfp, void *context,
47 void (*cont)(const struct firmware *fw, void *context));
48
49void release_firmware(const struct firmware *fw);
50int cache_firmware(const char *name);
51int uncache_firmware(const char *name);
52#else
53static inline int request_firmware(const struct firmware **fw,
54 const char *name,
55 struct device *device)
56{
57 return -EINVAL;
58}
59static inline int request_firmware_nowait(
60 struct module *module, bool uevent,
61 const char *name, struct device *device, gfp_t gfp, void *context,
62 void (*cont)(const struct firmware *fw, void *context))
63{
64 return -EINVAL;
65}
66
67static inline void release_firmware(const struct firmware *fw)
68{
69}
70
71static inline int cache_firmware(const char *name)
72{
73 return -ENOENT;
74}
75
76static inline int uncache_firmware(const char *name)
77{
78 return -EINVAL;
79}
80#endif
81
82#endif