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TOMOYO Linux Cross Reference
Linux/include/linux/i8042.h

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  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 
 68 static inline void i8042_lock_chip(void)
 69 {
 70 }
 71 
 72 static inline void i8042_unlock_chip(void)
 73 {
 74 }
 75 
 76 static inline int i8042_command(unsigned char *param, int command)
 77 {
 78         return -ENODEV;
 79 }
 80 
 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 
 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 

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