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