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 Roh��r <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
23/* Tokens used in kernel drivers, any of these
24 * should be filtered from userspace access
25 */
26#define BRIGHTNESS_TOKEN	0x007d
27#define KBD_LED_AC_TOKEN	0x0451
28#define KBD_LED_OFF_TOKEN	0x01E1
29#define KBD_LED_ON_TOKEN	0x01E2
30#define KBD_LED_AUTO_TOKEN	0x01E3
31#define KBD_LED_AUTO_25_TOKEN	0x02EA
32#define KBD_LED_AUTO_50_TOKEN	0x02EB
33#define KBD_LED_AUTO_75_TOKEN	0x02EC
34#define KBD_LED_AUTO_100_TOKEN	0x02F6
35#define GLOBAL_MIC_MUTE_ENABLE	0x0364
36#define GLOBAL_MIC_MUTE_DISABLE	0x0365
37#define GLOBAL_MUTE_ENABLE	0x058C
38#define GLOBAL_MUTE_DISABLE	0x058D
39
40struct notifier_block;
41
42struct calling_interface_token {
43	u16 tokenID;
44	u16 location;
45	union {
46		u16 value;
47		u16 stringlength;
48	};
49};
50
51struct calling_interface_structure {
52	struct dmi_header header;
53	u16 cmdIOAddress;
54	u8 cmdIOCode;
55	u32 supportedCmds;
56	struct calling_interface_token tokens[];
57} __packed;
58
59int dell_smbios_register_device(struct device *d, void *call_fn);
60void dell_smbios_unregister_device(struct device *d);
61
62int dell_smbios_error(int value);
63int dell_smbios_call_filter(struct device *d,
64	struct calling_interface_buffer *buffer);
65int dell_smbios_call(struct calling_interface_buffer *buffer);
66
67struct calling_interface_token *dell_smbios_find_token(int tokenid);
68
69enum dell_laptop_notifier_actions {
70	DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED,
71};
72
73int dell_laptop_register_notifier(struct notifier_block *nb);
74int dell_laptop_unregister_notifier(struct notifier_block *nb);
75void dell_laptop_call_notifier(unsigned long action, void *data);
76
77/* for the supported backends */
78#ifdef CONFIG_DELL_SMBIOS_WMI
79int init_dell_smbios_wmi(void);
80void exit_dell_smbios_wmi(void);
81#else /* CONFIG_DELL_SMBIOS_WMI */
82static inline int init_dell_smbios_wmi(void)
83{
84	return -ENODEV;
85}
86static inline void exit_dell_smbios_wmi(void)
87{}
88#endif /* CONFIG_DELL_SMBIOS_WMI */
89
90#ifdef CONFIG_DELL_SMBIOS_SMM
91int init_dell_smbios_smm(void);
92void exit_dell_smbios_smm(void);
93#else /* CONFIG_DELL_SMBIOS_SMM */
94static inline int init_dell_smbios_smm(void)
95{
96	return -ENODEV;
97}
98static inline void exit_dell_smbios_smm(void)
99{}
100#endif /* CONFIG_DELL_SMBIOS_SMM */
101
102#endif /* _DELL_SMBIOS_H_ */
103