linux-headers (unknown)
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 _LINUX_TOSHIBA_H
23 #define _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 /* _LINUX_TOSHIBA_H */
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