drivers/platform/x86/dell-smbios.h

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