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