/* * (C) Copyright 2002 ELTEC Elektronik AG * Frank Gottschling <fgottschling@eltec.de> * * SPDX-License-Identifier: GPL-2.0+ */ /* i8042.h - Intel 8042 keyboard driver header */ #ifndef _I8042_H_ #define _I8042_H_ /* defines */ #define I8042_DATA_REG 0x60 /* keyboard i/o buffer */ #define I8042_STS_REG 0x64 /* keyboard status read */ #define I8042_CMD_REG 0x64 /* keyboard ctrl write */ /* Status register bit defines */ #define STATUS_OBF (1 << 0) #define STATUS_IBF (1 << 1) /* Configuration byte bit defines */ #define CONFIG_KIRQ_EN (1 << 0) #define CONFIG_MIRQ_EN (1 << 1) #define CONFIG_SET_BIST (1 << 2) #define CONFIG_KCLK_DIS (1 << 4) #define CONFIG_MCLK_DIS (1 << 5) #define CONFIG_AT_TRANS (1 << 6) /* i8042 commands */ #define CMD_RD_CONFIG 0x20 /* read configuration byte */ #define CMD_WR_CONFIG 0x60 /* write configuration byte */ #define CMD_SELF_TEST 0xaa /* controller self-test */ #define CMD_KBD_DIS 0xad /* keyboard disable */ #define CMD_KBD_EN 0xae /* keyboard enable */ #define CMD_SET_KBD_LED 0xed /* set keyboard led */ #define CMD_DRAIN_OUTPUT 0xf4 /* drain output buffer */ #define CMD_RESET_KBD 0xff /* reset keyboard */ /* i8042 command result */ #define KBC_TEST_OK 0x55 #define KBD_ACK 0xfa #define KBD_POR 0xaa /* keyboard scan codes */ #define KBD_US 0 /* default US layout */ #define KBD_GER 1 /* german layout */ #define KBD_TIMEOUT 1000 /* 1 sec */ #define KBD_RESET_TRIES 3 #define AS 0 /* normal character index */ #define SH 1 /* shift index */ #define CN 2 /* control index */ #define NM 3 /* numeric lock index */ #define AK 4 /* right alt key */ #define CP 5 /* capslock index */ #define ST 6 /* stop output index */ #define EX 7 /* extended code index */ #define ES 8 /* escape and extended code index */ #define NORMAL 0x0000 /* normal key */ #define STP 0x0001 /* scroll lock stop output*/ #define NUM 0x0002 /* numeric lock */ #define CAPS 0x0004 /* capslock */ #define SHIFT 0x0008 /* shift */ #define CTRL 0x0010 /* control*/ #define EXT 0x0020 /* extended scan code 0xe0 */ #define ESC 0x0040 /* escape key press */ #define E1 0x0080 /* extended scan code 0xe1 */ #define BRK 0x0100 /* make break flag for keyboard */ #define ALT 0x0200 /* right alt */ /* exports */ /** * Flush all buffer from keyboard controller to host. */ void i8042_flush(void); /** * Disables the keyboard so that key strokes no longer generate scancodes to * the host. * * @return 0 if ok, -1 if keyboard input was found while disabling */ int i8042_disable(void); #endif /* _I8042_H_ */