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