1 /* 2 * (C) Copyright 2002 ELTEC Elektronik AG 3 * Frank Gottschling <fgottschling@eltec.de> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* i8042.h - Intel 8042 keyboard driver header */ 9 10 #ifndef _I8042_H_ 11 #define _I8042_H_ 12 13 #ifdef __I386__ 14 #include <common.h> 15 #include <asm/io.h> 16 #define in8(p) inb(p) 17 #define out8(p,v) outb(v,p) 18 #endif 19 20 /* defines */ 21 22 #define I8042_DATA_REG (CONFIG_SYS_ISA_IO + 0x0060) /* keyboard i/o buffer */ 23 #define I8042_STATUS_REG (CONFIG_SYS_ISA_IO + 0x0064) /* keyboard status read */ 24 #define I8042_COMMAND_REG (CONFIG_SYS_ISA_IO + 0x0064) /* keyboard ctrl write */ 25 26 enum { 27 /* Output register (I8042_DATA_REG) has data for system */ 28 I8042_STATUS_OUT_DATA = 1 << 0, 29 I8042_STATUS_IN_DATA = 1 << 1, 30 }; 31 32 #define KBD_US 0 /* default US layout */ 33 #define KBD_GER 1 /* german layout */ 34 35 #define KBD_TIMEOUT 1000 /* 1 sec */ 36 #define KBD_RESET_TRIES 3 37 38 #define AS 0 /* normal character index */ 39 #define SH 1 /* shift index */ 40 #define CN 2 /* control index */ 41 #define NM 3 /* numeric lock index */ 42 #define AK 4 /* right alt key */ 43 #define CP 5 /* capslock index */ 44 #define ST 6 /* stop output index */ 45 #define EX 7 /* extended code index */ 46 #define ES 8 /* escape and extended code index */ 47 48 #define NORMAL 0x0000 /* normal key */ 49 #define STP 0x0001 /* scroll lock stop output*/ 50 #define NUM 0x0002 /* numeric lock */ 51 #define CAPS 0x0004 /* capslock */ 52 #define SHIFT 0x0008 /* shift */ 53 #define CTRL 0x0010 /* control*/ 54 #define EXT 0x0020 /* extended scan code 0xe0 */ 55 #define ESC 0x0040 /* escape key press */ 56 #define E1 0x0080 /* extended scan code 0xe1 */ 57 #define BRK 0x0100 /* make break flag for keyboard */ 58 #define ALT 0x0200 /* right alt */ 59 60 /* exports */ 61 62 /** 63 * Flush all buffer from keyboard controller to host. 64 */ 65 void i8042_flush(void); 66 67 /** 68 * Disables the keyboard so that key strokes no longer generate scancodes to 69 * the host. 70 * 71 * @return 0 if ok, -1 if keyboard input was found while disabling 72 */ 73 int i8042_disable(void); 74 75 struct stdio_dev; 76 77 int i8042_kbd_init(void); 78 int i8042_tstc(struct stdio_dev *dev); 79 int i8042_getc(struct stdio_dev *dev); 80 81 #endif /* _I8042_H_ */ 82