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_ */