LXR uboot/include/i8042.h

   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/* defines */
  14
  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 */
  18
  19/* Status register bit defines */
  20#define STATUS_OBF      (1 << 0)
  21#define STATUS_IBF      (1 << 1)
  22
  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)
  30
  31/* i8042 commands */
  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 */
  40
  41/* i8042 command result */
  42#define KBC_TEST_OK     0x55
  43#define KBD_ACK         0xfa
  44#define KBD_POR         0xaa
  45
  46/* keyboard scan codes */
  47
  48#define KBD_US          0       /* default US layout */
  49#define KBD_GER         1       /* german layout */
  50
  51#define KBD_TIMEOUT     1000    /* 1 sec */
  52#define KBD_RESET_TRIES 3
  53
  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 */
  63
  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 */
  75
  76/* exports */
  77
  78/**
  79 * Flush all buffer from keyboard controller to host.
  80 */
  81void i8042_flush(void);
  82
  83/**
  84 * Disables the keyboard so that key strokes no longer generate scancodes to
  85 * the host.
  86 *
  87 * @return 0 if ok, -1 if keyboard input was found while disabling
  88 */
  89int i8042_disable(void);
  90
  91#endif /* _I8042_H_ */
  92