1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _LINUX_I8042_H
3 #define _LINUX_I8042_H
4
5
6 #include <linux/errno.h>
7 #include <linux/types.h>
8
9 /*
10 * Standard commands.
11 */
12
13 #define I8042_CMD_CTL_RCTR 0x0120
14 #define I8042_CMD_CTL_WCTR 0x1060
15 #define I8042_CMD_CTL_TEST 0x01aa
16
17 #define I8042_CMD_KBD_DISABLE 0x00ad
18 #define I8042_CMD_KBD_ENABLE 0x00ae
19 #define I8042_CMD_KBD_TEST 0x01ab
20 #define I8042_CMD_KBD_LOOP 0x11d2
21
22 #define I8042_CMD_AUX_DISABLE 0x00a7
23 #define I8042_CMD_AUX_ENABLE 0x00a8
24 #define I8042_CMD_AUX_TEST 0x01a9
25 #define I8042_CMD_AUX_SEND 0x10d4
26 #define I8042_CMD_AUX_LOOP 0x11d3
27
28 #define I8042_CMD_MUX_PFX 0x0090
29 #define I8042_CMD_MUX_SEND 0x1090
30
31 /*
32 * Status register bits.
33 */
34
35 #define I8042_STR_PARITY 0x80
36 #define I8042_STR_TIMEOUT 0x40
37 #define I8042_STR_AUXDATA 0x20
38 #define I8042_STR_KEYLOCK 0x10
39 #define I8042_STR_CMDDAT 0x08
40 #define I8042_STR_MUXERR 0x04
41 #define I8042_STR_IBF 0x02
42 #define I8042_STR_OBF 0x01
43
44 /*
45 * Control register bits.
46 */
47
48 #define I8042_CTR_KBDINT 0x01
49 #define I8042_CTR_AUXINT 0x02
50 #define I8042_CTR_IGNKEYLOCK 0x08
51 #define I8042_CTR_KBDDIS 0x10
52 #define I8042_CTR_AUXDIS 0x20
53 #define I8042_CTR_XLATE 0x40
54
55 struct serio;
56
57 #if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE)
58
59 void i8042_lock_chip(void);
60 void i8042_unlock_chip(void);
61 int i8042_command(unsigned char *param, int command);
62 int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
63 struct serio *serio));
64 int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
65 struct serio *serio));
66
67 #else
68
69 static inline void i8042_lock_chip(void)
70 {
71 }
72
73 static inline void i8042_unlock_chip(void)
74 {
75 }
76
77 static inline int i8042_command(unsigned char *param, int command)
78 {
79 return -ENODEV;
80 }
81
82 static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
83 struct serio *serio))
84 {
85 return -ENODEV;
86 }
87
88 static inline int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
89 struct serio *serio))
90 {
91 return -ENODEV;
92 }
93
94 #endif
95
96 #endif
97
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