25d47027e1
Some race conditions were raised due to dell-smbios and its backends not being ready by the time that a consumer would call one of the exported methods. To avoid this problem, guarantee that all initialization has been done by linking them all together and running init for them all. As part of this change the Kconfig needs to be adjusted so that CONFIG_DELL_SMBIOS_SMM and CONFIG_DELL_SMBIOS_WMI are boolean rather than modules. CONFIG_DELL_SMBIOS is a visually selectable option again and both CONFIG_DELL_SMBIOS_WMI and CONFIG_DELL_SMBIOS_SMM are optional. Signed-off-by: Mario Limonciello <mario.limonciello@dell.com> [dvhart: Update prompt and help text for DELL_SMBIOS_* backends] Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/*
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* Common functions for kernel modules using Dell SMBIOS
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*
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* Copyright (c) Red Hat <mjg@redhat.com>
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* Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
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* Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
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*
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* Based on documentation in the libsmbios package:
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* Copyright (C) 2005-2014 Dell Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DELL_SMBIOS_H_
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#define _DELL_SMBIOS_H_
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#include <linux/device.h>
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#include <uapi/linux/wmi.h>
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/* Classes and selects used only in kernel drivers */
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#define CLASS_KBD_BACKLIGHT 4
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#define SELECT_KBD_BACKLIGHT 11
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/* Tokens used in kernel drivers, any of these
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* should be filtered from userspace access
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*/
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#define BRIGHTNESS_TOKEN 0x007d
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#define KBD_LED_AC_TOKEN 0x0451
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#define KBD_LED_OFF_TOKEN 0x01E1
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#define KBD_LED_ON_TOKEN 0x01E2
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#define KBD_LED_AUTO_TOKEN 0x01E3
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#define KBD_LED_AUTO_25_TOKEN 0x02EA
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#define KBD_LED_AUTO_50_TOKEN 0x02EB
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#define KBD_LED_AUTO_75_TOKEN 0x02EC
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#define KBD_LED_AUTO_100_TOKEN 0x02F6
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#define GLOBAL_MIC_MUTE_ENABLE 0x0364
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#define GLOBAL_MIC_MUTE_DISABLE 0x0365
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struct notifier_block;
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struct calling_interface_token {
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u16 tokenID;
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u16 location;
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union {
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u16 value;
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u16 stringlength;
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};
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};
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struct calling_interface_structure {
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struct dmi_header header;
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u16 cmdIOAddress;
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u8 cmdIOCode;
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u32 supportedCmds;
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struct calling_interface_token tokens[];
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} __packed;
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int dell_smbios_register_device(struct device *d, void *call_fn);
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void dell_smbios_unregister_device(struct device *d);
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int dell_smbios_error(int value);
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int dell_smbios_call_filter(struct device *d,
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struct calling_interface_buffer *buffer);
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int dell_smbios_call(struct calling_interface_buffer *buffer);
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struct calling_interface_token *dell_smbios_find_token(int tokenid);
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enum dell_laptop_notifier_actions {
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DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED,
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};
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int dell_laptop_register_notifier(struct notifier_block *nb);
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int dell_laptop_unregister_notifier(struct notifier_block *nb);
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void dell_laptop_call_notifier(unsigned long action, void *data);
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/* for the supported backends */
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#ifdef CONFIG_DELL_SMBIOS_WMI
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int init_dell_smbios_wmi(void);
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void exit_dell_smbios_wmi(void);
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#else /* CONFIG_DELL_SMBIOS_WMI */
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static inline int init_dell_smbios_wmi(void)
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{
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return -ENODEV;
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}
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static inline void exit_dell_smbios_wmi(void)
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{}
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#endif /* CONFIG_DELL_SMBIOS_WMI */
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#ifdef CONFIG_DELL_SMBIOS_SMM
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int init_dell_smbios_smm(void);
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void exit_dell_smbios_smm(void);
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#else /* CONFIG_DELL_SMBIOS_SMM */
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static inline int init_dell_smbios_smm(void)
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{
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return -ENODEV;
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}
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static inline void exit_dell_smbios_smm(void)
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{}
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#endif /* CONFIG_DELL_SMBIOS_SMM */
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#endif /* _DELL_SMBIOS_H_ */
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