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