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1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /* toshiba.h -- Linux driver for accessing the SMM on Toshiba laptops
3  *
4  * Copyright (c) 1996-2000  Jonathan A. Buzzard (jonathan@buzzard.org.uk)
5  * Copyright (c) 2015  Azael Avalos <coproscefalo@gmail.com>
6  *
7  * Thanks to Juergen Heinzl <juergen@monocerus.demon.co.uk> for the pointers
8  * on making sure the structure is aligned and packed.
9  *
10  * This program is free software; you can redistribute it and/or modify it
11  * under the terms of the GNU General Public License as published by the
12  * Free Software Foundation; either version 2, or (at your option) any
13  * later version.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  */
21 
22 #ifndef _UAPI_LINUX_TOSHIBA_H
23 #define _UAPI_LINUX_TOSHIBA_H
24 
25 /*
26  * Toshiba modules paths
27  */
28 
29 #define TOSH_PROC		"/proc/toshiba"
30 #define TOSH_DEVICE		"/dev/toshiba"
31 #define TOSHIBA_ACPI_PROC	"/proc/acpi/toshiba"
32 #define TOSHIBA_ACPI_DEVICE	"/dev/toshiba_acpi"
33 
34 /*
35  * Toshiba SMM structure
36  */
37 
38 typedef struct {
39 	unsigned int eax;
40 	unsigned int ebx __attribute__ ((packed));
41 	unsigned int ecx __attribute__ ((packed));
42 	unsigned int edx __attribute__ ((packed));
43 	unsigned int esi __attribute__ ((packed));
44 	unsigned int edi __attribute__ ((packed));
45 } SMMRegisters;
46 
47 /*
48  * IOCTLs (0x90 - 0x91)
49  */
50 
51 #define TOSH_SMM		_IOWR('t', 0x90, SMMRegisters)
52 /*
53  * Convenience toshiba_acpi command.
54  *
55  * The System Configuration Interface (SCI) is opened/closed internally
56  * to avoid userspace of buggy BIOSes.
57  *
58  * The toshiba_acpi module checks whether the eax register is set with
59  * SCI_GET (0xf300) or SCI_SET (0xf400), returning -EINVAL if not.
60  */
61 #define TOSHIBA_ACPI_SCI	_IOWR('t', 0x91, SMMRegisters)
62 
63 
64 #endif /* _UAPI_LINUX_TOSHIBA_H */
65