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1c1658058c
Many machines treat fan state 3 as some sort of automatic mode, which is superior to the separate SMM calls for switching to automatic fan mode for two reasons: - the fan control mode can be controlled for each fan separately - the current fan control mode can be retrieved from the BIOS On some machines however, this special fan state does not exist. Fan state 3 acts like a regular fan state on such machines or does not exist at all. Such machines usually use separate SMM calls for enabling/disabling automatic fan control. Add support for it. If the machine supports separate SMM calls for changing the fan control mode, then the other interface is ignored. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20250917181036.10972-4-W_Armin@gmx.de Signed-off-by: Guenter Roeck <linux@roeck-us.net>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* i8k.h -- Linux driver for accessing the SMM BIOS on Dell laptops
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*
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* Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef _LINUX_I8K_H
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#define _LINUX_I8K_H
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#define I8K_PROC "/proc/i8k"
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#define I8K_PROC_FMT "1.0"
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#define I8K_BIOS_VERSION _IOR ('i', 0x80, int) /* broken: meant 4 bytes */
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#define I8K_MACHINE_ID _IOR ('i', 0x81, int) /* broken: meant 16 bytes */
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#define I8K_POWER_STATUS _IOR ('i', 0x82, size_t)
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#define I8K_FN_STATUS _IOR ('i', 0x83, size_t)
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#define I8K_GET_TEMP _IOR ('i', 0x84, size_t)
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#define I8K_GET_SPEED _IOWR('i', 0x85, size_t)
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#define I8K_GET_FAN _IOWR('i', 0x86, size_t)
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#define I8K_SET_FAN _IOWR('i', 0x87, size_t)
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#define I8K_FAN_LEFT 1
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#define I8K_FAN_RIGHT 0
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#define I8K_FAN_OFF 0
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#define I8K_FAN_LOW 1
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#define I8K_FAN_HIGH 2
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#define I8K_FAN_TURBO 3
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/* Many machines treat this mode as some sort of automatic mode */
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#define I8K_FAN_AUTO 3
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#define I8K_FAN_MAX I8K_FAN_TURBO
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#define I8K_VOL_UP 1
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#define I8K_VOL_DOWN 2
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#define I8K_VOL_MUTE 4
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#define I8K_AC 1
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#define I8K_BATTERY 0
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#endif
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