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