1#ifndef _LINUX_I8042_H
2#define _LINUX_I8042_H
3
4/*
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 */
9
10#include <linux/types.h>
11
12/*
13 * Standard commands.
14 */
15
16#define I8042_CMD_CTL_RCTR	0x0120
17#define I8042_CMD_CTL_WCTR	0x1060
18#define I8042_CMD_CTL_TEST	0x01aa
19
20#define I8042_CMD_KBD_DISABLE	0x00ad
21#define I8042_CMD_KBD_ENABLE	0x00ae
22#define I8042_CMD_KBD_TEST	0x01ab
23#define I8042_CMD_KBD_LOOP	0x11d2
24
25#define I8042_CMD_AUX_DISABLE	0x00a7
26#define I8042_CMD_AUX_ENABLE	0x00a8
27#define I8042_CMD_AUX_TEST	0x01a9
28#define I8042_CMD_AUX_SEND	0x10d4
29#define I8042_CMD_AUX_LOOP	0x11d3
30
31#define I8042_CMD_MUX_PFX	0x0090
32#define I8042_CMD_MUX_SEND	0x1090
33
34/*
35 * Status register bits.
36 */
37
38#define I8042_STR_PARITY	0x80
39#define I8042_STR_TIMEOUT	0x40
40#define I8042_STR_AUXDATA	0x20
41#define I8042_STR_KEYLOCK	0x10
42#define I8042_STR_CMDDAT	0x08
43#define I8042_STR_MUXERR	0x04
44#define I8042_STR_IBF		0x02
45#define I8042_STR_OBF		0x01
46
47/*
48 * Control register bits.
49 */
50
51#define I8042_CTR_KBDINT	0x01
52#define I8042_CTR_AUXINT	0x02
53#define I8042_CTR_IGNKEYLOCK	0x08
54#define I8042_CTR_KBDDIS	0x10
55#define I8042_CTR_AUXDIS	0x20
56#define I8042_CTR_XLATE		0x40
57
58struct serio;
59
60#if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE)
61
62void i8042_lock_chip(void);
63void i8042_unlock_chip(void);
64int i8042_command(unsigned char *param, int command);
65bool i8042_check_port_owner(const struct serio *);
66int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
67					struct serio *serio));
68int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
69				       struct serio *serio));
70
71#else
72
73static inline void i8042_lock_chip(void)
74{
75}
76
77static inline void i8042_unlock_chip(void)
78{
79}
80
81static inline int i8042_command(unsigned char *param, int command)
82{
83	return -ENODEV;
84}
85
86static inline bool i8042_check_port_owner(const struct serio *serio)
87{
88	return false;
89}
90
91static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
92					struct serio *serio))
93{
94	return -ENODEV;
95}
96
97static inline int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
98				       struct serio *serio))
99{
100	return -ENODEV;
101}
102
103#endif
104
105#endif
106