i8042.h (2041B)
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 54struct serio; 55 56#if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE) 57 58void i8042_lock_chip(void); 59void i8042_unlock_chip(void); 60int i8042_command(unsigned char *param, int command); 61int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str, 62 struct serio *serio)); 63int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str, 64 struct serio *serio)); 65 66#else 67 68static inline void i8042_lock_chip(void) 69{ 70} 71 72static inline void i8042_unlock_chip(void) 73{ 74} 75 76static inline int i8042_command(unsigned char *param, int command) 77{ 78 return -ENODEV; 79} 80 81static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str, 82 struct serio *serio)) 83{ 84 return -ENODEV; 85} 86 87static 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