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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Common functions for kernel modules using Dell SMBIOS
*
* Copyright (c) Red Hat <mjg@redhat.com>
* Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
* Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
*
* Based on documentation in the libsmbios package:
* Copyright (C) 2005-2014 Dell Inc.
*/
#ifndef _DELL_SMBIOS_H_
#define _DELL_SMBIOS_H_
#include <linux/device.h>
#include <uapi/linux/wmi.h>
/* Classes and selects used only in kernel drivers */
#define CLASS_KBD_BACKLIGHT 4
#define SELECT_KBD_BACKLIGHT 11
/* Tokens used in kernel drivers, any of these
* should be filtered from userspace access
*/
#define BRIGHTNESS_TOKEN 0x007d
#define KBD_LED_AC_TOKEN 0x0451
#define KBD_LED_OFF_TOKEN 0x01E1
#define KBD_LED_ON_TOKEN 0x01E2
#define KBD_LED_AUTO_TOKEN 0x01E3
#define KBD_LED_AUTO_25_TOKEN 0x02EA
#define KBD_LED_AUTO_50_TOKEN 0x02EB
#define KBD_LED_AUTO_75_TOKEN 0x02EC
#define KBD_LED_AUTO_100_TOKEN 0x02F6
#define GLOBAL_MIC_MUTE_ENABLE 0x0364
#define GLOBAL_MIC_MUTE_DISABLE 0x0365
struct notifier_block;
struct calling_interface_token {
u16 tokenID;
u16 location;
union {
u16 value;
u16 stringlength;
};
};
struct calling_interface_structure {
struct dmi_header header;
u16 cmdIOAddress;
u8 cmdIOCode;
u32 supportedCmds;
struct calling_interface_token tokens[];
} __packed;
int dell_smbios_register_device(struct device *d, void *call_fn);
void dell_smbios_unregister_device(struct device *d);
int dell_smbios_error(int value);
int dell_smbios_call_filter(struct device *d,
struct calling_interface_buffer *buffer);
int dell_smbios_call(struct calling_interface_buffer *buffer);
struct calling_interface_token *dell_smbios_find_token(int tokenid);
enum dell_laptop_notifier_actions {
DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED,
};
int dell_laptop_register_notifier(struct notifier_block *nb);
int dell_laptop_unregister_notifier(struct notifier_block *nb);
void dell_laptop_call_notifier(unsigned long action, void *data);
/* for the supported backends */
#ifdef CONFIG_DELL_SMBIOS_WMI
int init_dell_smbios_wmi(void);
void exit_dell_smbios_wmi(void);
#else /* CONFIG_DELL_SMBIOS_WMI */
static inline int init_dell_smbios_wmi(void)
{
return -ENODEV;
}
static inline void exit_dell_smbios_wmi(void)
{}
#endif /* CONFIG_DELL_SMBIOS_WMI */
#ifdef CONFIG_DELL_SMBIOS_SMM
int init_dell_smbios_smm(void);
void exit_dell_smbios_smm(void);
#else /* CONFIG_DELL_SMBIOS_SMM */
static inline int init_dell_smbios_smm(void)
{
return -ENODEV;
}
static inline void exit_dell_smbios_smm(void)
{}
#endif /* CONFIG_DELL_SMBIOS_SMM */
#endif /* _DELL_SMBIOS_H_ */
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