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