2 * (C) Copyright 2002 ELTEC Elektronik AG
3 * Frank Gottschling <fgottschling@eltec.de>
5 * SPDX-License-Identifier: GPL-2.0+
8 /* i8042.h - Intel 8042 keyboard driver header */
15 #define I8042_DATA_REG 0x60 /* keyboard i/o buffer */
16 #define I8042_STS_REG 0x64 /* keyboard status read */
17 #define I8042_CMD_REG 0x64 /* keyboard ctrl write */
19 /* Status register bit defines */
20 #define STATUS_OBF (1 << 0)
21 #define STATUS_IBF (1 << 1)
23 /* Configuration byte bit defines */
24 #define CONFIG_KIRQ_EN (1 << 0)
25 #define CONFIG_MIRQ_EN (1 << 1)
26 #define CONFIG_SET_BIST (1 << 2)
27 #define CONFIG_KCLK_DIS (1 << 4)
28 #define CONFIG_MCLK_DIS (1 << 5)
29 #define CONFIG_AT_TRANS (1 << 6)
32 #define CMD_RD_CONFIG 0x20 /* read configuration byte */
33 #define CMD_WR_CONFIG 0x60 /* write configuration byte */
34 #define CMD_SELF_TEST 0xaa /* controller self-test */
35 #define CMD_KBD_DIS 0xad /* keyboard disable */
36 #define CMD_KBD_EN 0xae /* keyboard enable */
37 #define CMD_SET_KBD_LED 0xed /* set keyboard led */
38 #define CMD_DRAIN_OUTPUT 0xf4 /* drain output buffer */
39 #define CMD_RESET_KBD 0xff /* reset keyboard */
41 /* i8042 command result */
42 #define KBC_TEST_OK 0x55
46 /* keyboard scan codes */
48 #define KBD_US 0 /* default US layout */
49 #define KBD_GER 1 /* german layout */
51 #define KBD_TIMEOUT 1000 /* 1 sec */
52 #define KBD_RESET_TRIES 3
54 #define AS 0 /* normal character index */
55 #define SH 1 /* shift index */
56 #define CN 2 /* control index */
57 #define NM 3 /* numeric lock index */
58 #define AK 4 /* right alt key */
59 #define CP 5 /* capslock index */
60 #define ST 6 /* stop output index */
61 #define EX 7 /* extended code index */
62 #define ES 8 /* escape and extended code index */
64 #define NORMAL 0x0000 /* normal key */
65 #define STP 0x0001 /* scroll lock stop output*/
66 #define NUM 0x0002 /* numeric lock */
67 #define CAPS 0x0004 /* capslock */
68 #define SHIFT 0x0008 /* shift */
69 #define CTRL 0x0010 /* control*/
70 #define EXT 0x0020 /* extended scan code 0xe0 */
71 #define ESC 0x0040 /* escape key press */
72 #define E1 0x0080 /* extended scan code 0xe1 */
73 #define BRK 0x0100 /* make break flag for keyboard */
74 #define ALT 0x0200 /* right alt */
79 * Flush all buffer from keyboard controller to host.
81 void i8042_flush(void);
84 * Disables the keyboard so that key strokes no longer generate scancodes to
87 * @return 0 if ok, -1 if keyboard input was found while disabling
89 int i8042_disable(void);
91 #endif /* _I8042_H_ */