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 #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_ */