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 38 struct notifier_block; 39 40 struct calling_interface_token { 41 u16 tokenID; 42 u16 location; 43 union { 44 u16 value; 45 u16 stringlength; 46 }; 47 }; 48 49 struct calling_interface_structure { 50 struct dmi_header header; 51 u16 cmdIOAddress; 52 u8 cmdIOCode; 53 u32 supportedCmds; 54 struct calling_interface_token tokens[]; 55 } __packed; 56 57 int dell_smbios_register_device(struct device *d, void *call_fn); 58 void dell_smbios_unregister_device(struct device *d); 59 60 int dell_smbios_error(int value); 61 int dell_smbios_call_filter(struct device *d, 62 struct calling_interface_buffer *buffer); 63 int dell_smbios_call(struct calling_interface_buffer *buffer); 64 65 struct calling_interface_token *dell_smbios_find_token(int tokenid); 66 67 enum dell_laptop_notifier_actions { 68 DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, 69 }; 70 71 int dell_laptop_register_notifier(struct notifier_block *nb); 72 int dell_laptop_unregister_notifier(struct notifier_block *nb); 73 void dell_laptop_call_notifier(unsigned long action, void *data); 74 75 /* for the supported backends */ 76 #ifdef CONFIG_DELL_SMBIOS_WMI 77 int init_dell_smbios_wmi(void); 78 void exit_dell_smbios_wmi(void); 79 #else /* CONFIG_DELL_SMBIOS_WMI */ init_dell_smbios_wmi(void)80static inline int init_dell_smbios_wmi(void) 81 { 82 return -ENODEV; 83 } exit_dell_smbios_wmi(void)84static inline void exit_dell_smbios_wmi(void) 85 {} 86 #endif /* CONFIG_DELL_SMBIOS_WMI */ 87 88 #ifdef CONFIG_DELL_SMBIOS_SMM 89 int init_dell_smbios_smm(void); 90 void exit_dell_smbios_smm(void); 91 #else /* CONFIG_DELL_SMBIOS_SMM */ init_dell_smbios_smm(void)92static inline int init_dell_smbios_smm(void) 93 { 94 return -ENODEV; 95 } exit_dell_smbios_smm(void)96static inline void exit_dell_smbios_smm(void) 97 {} 98 #endif /* CONFIG_DELL_SMBIOS_SMM */ 99 100 #endif /* _DELL_SMBIOS_H_ */ 101