1/* SPDX-License-Identifier: GPL-2.0-only */ 2#ifndef _LINUX_I8042_H 3#define _LINUX_I8042_H 4 5 6#include <linux/errno.h> 7#include <linux/types.h> 8 9/* 10 * Standard commands. 11 */ 12 13#define I8042_CMD_CTL_RCTR 0x0120 14#define I8042_CMD_CTL_WCTR 0x1060 15#define I8042_CMD_CTL_TEST 0x01aa 16 17#define I8042_CMD_KBD_DISABLE 0x00ad 18#define I8042_CMD_KBD_ENABLE 0x00ae 19#define I8042_CMD_KBD_TEST 0x01ab 20#define I8042_CMD_KBD_LOOP 0x11d2 21 22#define I8042_CMD_AUX_DISABLE 0x00a7 23#define I8042_CMD_AUX_ENABLE 0x00a8 24#define I8042_CMD_AUX_TEST 0x01a9 25#define I8042_CMD_AUX_SEND 0x10d4 26#define I8042_CMD_AUX_LOOP 0x11d3 27 28#define I8042_CMD_MUX_PFX 0x0090 29#define I8042_CMD_MUX_SEND 0x1090 30 31/* 32 * Status register bits. 33 */ 34 35#define I8042_STR_PARITY 0x80 36#define I8042_STR_TIMEOUT 0x40 37#define I8042_STR_AUXDATA 0x20 38#define I8042_STR_KEYLOCK 0x10 39#define I8042_STR_CMDDAT 0x08 40#define I8042_STR_MUXERR 0x04 41#define I8042_STR_IBF 0x02 42#define I8042_STR_OBF 0x01 43 44/* 45 * Control register bits. 46 */ 47 48#define I8042_CTR_KBDINT 0x01 49#define I8042_CTR_AUXINT 0x02 50#define I8042_CTR_IGNKEYLOCK 0x08 51#define I8042_CTR_KBDDIS 0x10 52#define I8042_CTR_AUXDIS 0x20 53#define I8042_CTR_XLATE 0x40 54 55struct serio; 56 57#if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE) 58 59void i8042_lock_chip(void); 60void i8042_unlock_chip(void); 61int i8042_command(unsigned char *param, int command); 62int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str, 63 struct serio *serio)); 64int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str, 65 struct serio *serio)); 66 67#else 68 69static inline void i8042_lock_chip(void) 70{ 71} 72 73static inline void i8042_unlock_chip(void) 74{ 75} 76 77static inline int i8042_command(unsigned char *param, int command) 78{ 79 return -ENODEV; 80} 81 82static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str, 83 struct serio *serio)) 84{ 85 return -ENODEV; 86} 87 88static inline int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str, 89 struct serio *serio)) 90{ 91 return -ENODEV; 92} 93 94#endif 95 96#endif 97