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 48 struct notifier_block; 49 50 struct calling_interface_token { 51 u16 tokenID; 52 u16 location; 53 union { 54 u16 value; 55 u16 stringlength; 56 }; 57 }; 58 59 struct 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 67 int dell_smbios_register_device(struct device *d, void *call_fn); 68 void dell_smbios_unregister_device(struct device *d); 69 70 int dell_smbios_error(int value); 71 int dell_smbios_call_filter(struct device *d, 72 struct calling_interface_buffer *buffer); 73 int dell_smbios_call(struct calling_interface_buffer *buffer); 74 75 void dell_fill_request(struct calling_interface_buffer *buffer, 76 u32 arg0, u32 arg1, u32 arg2, u32 arg3); 77 int dell_send_request(struct calling_interface_buffer *buffer, 78 u16 class, u16 select); 79 80 struct calling_interface_token *dell_smbios_find_token(int tokenid); 81 82 enum dell_laptop_notifier_actions { 83 DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, 84 }; 85 86 int dell_laptop_register_notifier(struct notifier_block *nb); 87 int dell_laptop_unregister_notifier(struct notifier_block *nb); 88 void dell_laptop_call_notifier(unsigned long action, void *data); 89 bool dell_smbios_class_is_supported(u16 class); 90 91 /* for the supported backends */ 92 #ifdef CONFIG_DELL_SMBIOS_WMI 93 int init_dell_smbios_wmi(void); 94 void exit_dell_smbios_wmi(void); 95 #else /* CONFIG_DELL_SMBIOS_WMI */ 96 static inline int init_dell_smbios_wmi(void) 97 { 98 return -ENODEV; 99 } 100 static inline void exit_dell_smbios_wmi(void) 101 {} 102 #endif /* CONFIG_DELL_SMBIOS_WMI */ 103 104 #ifdef CONFIG_DELL_SMBIOS_SMM 105 int init_dell_smbios_smm(void); 106 void exit_dell_smbios_smm(void); 107 #else /* CONFIG_DELL_SMBIOS_SMM */ 108 static inline int init_dell_smbios_smm(void) 109 { 110 return -ENODEV; 111 } 112 static inline void exit_dell_smbios_smm(void) 113 {} 114 #endif /* CONFIG_DELL_SMBIOS_SMM */ 115 116 #endif /* _DELL_SMBIOS_H_ */ 117