include/i8042.h

   1 /*
   2  * (C) Copyright 2002 ELTEC Elektronik AG
   3  * Frank Gottschling <fgottschling@eltec.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /* i8042.h - Intel 8042 keyboard driver header */
  25
  26 #ifndef _I8042_H_
  27 #define _I8042_H_
  28
  29 #ifdef __I386__
  30 #include <common.h>
  31 #include <asm/io.h>
  32 #define in8(p) inb(p)
  33 #define out8(p,v) outb(v,p)
  34 #endif
  35
  36 /* defines */
  37
  38 #define I8042_DATA_REG      (CONFIG_SYS_ISA_IO + 0x0060)    /* keyboard i/o buffer */
  39 #define I8042_STATUS_REG    (CONFIG_SYS_ISA_IO + 0x0064)    /* keyboard status read */
  40 #define I8042_COMMAND_REG   (CONFIG_SYS_ISA_IO + 0x0064)    /* keyboard ctrl write */
  41
  42 enum {
  43         /* Output register (I8042_DATA_REG) has data for system */
  44         I8042_STATUS_OUT_DATA   = 1 << 0,
  45         I8042_STATUS_IN_DATA    = 1 << 1,
  46 };
  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  */
  81 void 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  */
  89 int i8042_disable(void);
  90
  91 int i8042_kbd_init(void);
  92 int i8042_tstc(void);
  93 int i8042_getc(void);
  94
  95 #endif /* _I8042_H_ */