Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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);
65int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
66 struct serio *serio));
67int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
68 struct serio *serio));
69
70#else
71
72static inline void i8042_lock_chip(void)
73{
74}
75
76static inline void i8042_unlock_chip(void)
77{
78}
79
80static inline int i8042_command(unsigned char *param, int command)
81{
82 return -ENODEV;
83}
84
85static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
86 struct serio *serio))
87{
88 return -ENODEV;
89}
90
91static inline int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
92 struct serio *serio))
93{
94 return -ENODEV;
95}
96
97#endif
98
99#endif