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 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 40 struct notifier_block; 41 42 struct calling_interface_token { 43 u16 tokenID; 44 u16 location; 45 union { 46 u16 value; 47 u16 stringlength; 48 }; 49 }; 50 51 struct 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 59 int dell_smbios_register_device(struct device *d, void *call_fn); 60 void dell_smbios_unregister_device(struct device *d); 61 62 int dell_smbios_error(int value); 63 int dell_smbios_call_filter(struct device *d, 64 struct calling_interface_buffer *buffer); 65 int dell_smbios_call(struct calling_interface_buffer *buffer); 66 67 struct calling_interface_token *dell_smbios_find_token(int tokenid); 68 69 enum dell_laptop_notifier_actions { 70 DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, 71 }; 72 73 int dell_laptop_register_notifier(struct notifier_block *nb); 74 int dell_laptop_unregister_notifier(struct notifier_block *nb); 75 void dell_laptop_call_notifier(unsigned long action, void *data); 76 77 /* for the supported backends */ 78 #ifdef CONFIG_DELL_SMBIOS_WMI 79 int init_dell_smbios_wmi(void); 80 void exit_dell_smbios_wmi(void); 81 #else /* CONFIG_DELL_SMBIOS_WMI */ init_dell_smbios_wmi(void)82static inline int init_dell_smbios_wmi(void) 83 { 84 return -ENODEV; 85 } exit_dell_smbios_wmi(void)86static inline void exit_dell_smbios_wmi(void) 87 {} 88 #endif /* CONFIG_DELL_SMBIOS_WMI */ 89 90 #ifdef CONFIG_DELL_SMBIOS_SMM 91 int init_dell_smbios_smm(void); 92 void exit_dell_smbios_smm(void); 93 #else /* CONFIG_DELL_SMBIOS_SMM */ init_dell_smbios_smm(void)94static inline int init_dell_smbios_smm(void) 95 { 96 return -ENODEV; 97 } exit_dell_smbios_smm(void)98static inline void exit_dell_smbios_smm(void) 99 {} 100 #endif /* CONFIG_DELL_SMBIOS_SMM */ 101 102 #endif /* _DELL_SMBIOS_H_ */ 103
