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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Common functions for kernel modules using Dell SMBIOS
4 *
5 * Copyright (c) Red Hat <mjg@redhat.com>
6 * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
7 * Copyright (c) 2014 Pali Rohár <pali@kernel.org>
8 *
9 * Based on documentation in the libsmbios package:
10 * Copyright (C) 2005-2014 Dell Inc.
11 */
12
13#ifndef _DELL_SMBIOS_H_
14#define _DELL_SMBIOS_H_
15
16#include <linux/device.h>
17#include <uapi/linux/wmi.h>
18
19/* Classes and selects used only in kernel drivers */
20#define CLASS_KBD_BACKLIGHT 4
21#define SELECT_KBD_BACKLIGHT 11
22#define SELECT_THERMAL_MANAGEMENT 19
23
24/* Tokens used in kernel drivers, any of these
25 * should be filtered from userspace access
26 */
27#define BRIGHTNESS_TOKEN 0x007d
28#define KBD_LED_AC_TOKEN 0x0451
29#define KBD_LED_OFF_TOKEN 0x01E1
30#define KBD_LED_ON_TOKEN 0x01E2
31#define KBD_LED_AUTO_TOKEN 0x01E3
32#define KBD_LED_AUTO_25_TOKEN 0x02EA
33#define KBD_LED_AUTO_50_TOKEN 0x02EB
34#define KBD_LED_AUTO_75_TOKEN 0x02EC
35#define KBD_LED_AUTO_100_TOKEN 0x02F6
36#define BAT_PRI_AC_MODE_TOKEN 0x0341
37#define BAT_ADAPTIVE_MODE_TOKEN 0x0342
38#define BAT_CUSTOM_MODE_TOKEN 0x0343
39#define BAT_STANDARD_MODE_TOKEN 0x0346
40#define BAT_EXPRESS_MODE_TOKEN 0x0347
41#define BAT_CUSTOM_CHARGE_START 0x0349
42#define BAT_CUSTOM_CHARGE_END 0x034A
43#define GLOBAL_MIC_MUTE_ENABLE 0x0364
44#define GLOBAL_MIC_MUTE_DISABLE 0x0365
45#define GLOBAL_MUTE_ENABLE 0x058C
46#define GLOBAL_MUTE_DISABLE 0x058D
47
48struct notifier_block;
49
50struct calling_interface_token {
51 u16 tokenID;
52 u16 location;
53 union {
54 u16 value;
55 u16 stringlength;
56 };
57};
58
59struct calling_interface_structure {
60 struct dmi_header header;
61 u16 cmdIOAddress;
62 u8 cmdIOCode;
63 u32 supportedCmds;
64 struct calling_interface_token tokens[];
65} __packed;
66
67int dell_smbios_register_device(struct device *d, void *call_fn);
68void dell_smbios_unregister_device(struct device *d);
69
70int dell_smbios_error(int value);
71int dell_smbios_call_filter(struct device *d,
72 struct calling_interface_buffer *buffer);
73int dell_smbios_call(struct calling_interface_buffer *buffer);
74
75void dell_fill_request(struct calling_interface_buffer *buffer,
76 u32 arg0, u32 arg1, u32 arg2, u32 arg3);
77int dell_send_request(struct calling_interface_buffer *buffer,
78 u16 class, u16 select);
79
80struct calling_interface_token *dell_smbios_find_token(int tokenid);
81
82enum dell_laptop_notifier_actions {
83 DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED,
84};
85
86int dell_laptop_register_notifier(struct notifier_block *nb);
87int dell_laptop_unregister_notifier(struct notifier_block *nb);
88void dell_laptop_call_notifier(unsigned long action, void *data);
89bool dell_smbios_class_is_supported(u16 class);
90
91/* for the supported backends */
92#ifdef CONFIG_DELL_SMBIOS_WMI
93int init_dell_smbios_wmi(void);
94void exit_dell_smbios_wmi(void);
95#else /* CONFIG_DELL_SMBIOS_WMI */
96static inline int init_dell_smbios_wmi(void)
97{
98 return -ENODEV;
99}
100static inline void exit_dell_smbios_wmi(void)
101{}
102#endif /* CONFIG_DELL_SMBIOS_WMI */
103
104#ifdef CONFIG_DELL_SMBIOS_SMM
105int init_dell_smbios_smm(void);
106void exit_dell_smbios_smm(void);
107#else /* CONFIG_DELL_SMBIOS_SMM */
108static inline int init_dell_smbios_smm(void)
109{
110 return -ENODEV;
111}
112static inline void exit_dell_smbios_smm(void)
113{}
114#endif /* CONFIG_DELL_SMBIOS_SMM */
115
116#endif /* _DELL_SMBIOS_H_ */