drivers/input/i8042.c

   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.c - Intel 8042 keyboard driver routines */
   9
  10 /* includes */
  11
  12 #include <common.h>
  13 #include <asm/io.h>
  14 #include <i8042.h>
  15
  16 /* defines */
  17 #define in8(p)          inb(p)
  18 #define out8(p, v)      outb(v, p)
  19
  20 #ifdef CONFIG_CONSOLE_CURSOR
  21 extern void console_cursor(int state);
  22 static int blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
  23 static int cursor_state;
  24 #endif
  25
  26 /* locals */
  27
  28 static int kbd_input = -1;              /* no input yet */
  29 static int kbd_mapping = KBD_US;        /* default US keyboard */
  30 static int kbd_flags = NORMAL;          /* after reset */
  31 static int kbd_state;                   /* unshift code */
  32
  33 static unsigned char kbd_fct_map[144] = {
  34         /* kbd_fct_map table for scan code */
  35          0,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 00-07 */
  36         AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 08-0F */
  37         AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 10-17 */
  38         AS,  AS,  AS,  AS,  AS,  CN,  AS,  AS, /* scan 18-1F */
  39         AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 20-27 */
  40         AS,  AS,  SH,  AS,  AS,  AS,  AS,  AS, /* scan 28-2F */
  41         AS,  AS,  AS,  AS,  AS,  AS,  SH,  AS, /* scan 30-37 */
  42         AS,  AS,  CP,   0,   0,   0,   0,   0, /* scan 38-3F */
  43          0,   0,   0,   0,   0,  NM,  ST,  ES, /* scan 40-47 */
  44         ES,  ES,  ES,  ES,  ES,  ES,  ES,  ES, /* scan 48-4F */
  45         ES,  ES,  ES,  ES,   0,   0,  AS,   0, /* scan 50-57 */
  46          0,   0,   0,   0,   0,   0,   0,   0, /* scan 58-5F */
  47          0,   0,   0,   0,   0,   0,   0,   0, /* scan 60-67 */
  48          0,   0,   0,   0,   0,   0,   0,   0, /* scan 68-6F */
  49         AS,   0,   0,  AS,   0,   0,  AS,   0, /* scan 70-77 */
  50          0,  AS,   0,   0,   0,  AS,   0,   0, /* scan 78-7F */
  51         AS,  CN,  AS,  AS,  AK,  ST,  EX,  EX, /* enhanced */
  52         AS,  EX,  EX,  AS,  EX,  AS,  EX,  EX  /* enhanced */
  53         };
  54
  55 static unsigned char kbd_key_map[2][5][144] = {
  56         { /* US keyboard */
  57         { /* unshift code */
  58            0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan 00-07 */
  59          '7',  '8',  '9',  '0',  '-',  '=', 0x08, '\t', /* scan 08-0F */
  60          'q',  'w',  'e',  'r',  't',  'y',  'u',  'i', /* scan 10-17 */
  61          'o',  'p',  '[',  ']', '\r',   CN,  'a',  's', /* scan 18-1F */
  62          'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';', /* scan 20-27 */
  63         '\'',  '`',   SH, '\\',  'z',  'x',  'c',  'v', /* scan 28-2F */
  64          'b',  'n',  'm',  ',',  '.',  '/',   SH,  '*', /* scan 30-37 */
  65          ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
  66            0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
  67          '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
  68          '2',  '3',  '0',  '.',    0,    0,    0,    0, /* scan 50-57 */
  69            0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
  70            0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
  71            0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
  72            0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
  73            0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
  74         '\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
  75            0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
  76         },
  77         { /* shift code */
  78            0, 0x1b,  '!',  '@',  '#',  '$',  '%',  '^', /* scan 00-07 */
  79          '&',  '*',  '(',  ')',  '_',  '+', 0x08, '\t', /* scan 08-0F */
  80          'Q',  'W',  'E',  'R',  'T',  'Y',  'U',  'I', /* scan 10-17 */
  81          'O',  'P',  '{',  '}', '\r',   CN,  'A',  'S', /* scan 18-1F */
  82          'D',  'F',  'G',  'H',  'J',  'K',  'L',  ':', /* scan 20-27 */
  83          '"',  '~',   SH,  '|',  'Z',  'X',  'C',  'V', /* scan 28-2F */
  84          'B',  'N',  'M',  '<',  '>',  '?',   SH,  '*', /* scan 30-37 */
  85          ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
  86            0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
  87          '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
  88          '2',  '3',  '0',  '.',    0,    0,    0,    0, /* scan 50-57 */
  89            0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
  90            0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
  91            0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
  92            0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
  93            0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
  94         '\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
  95            0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
  96         },
  97         { /* control code */
  98         0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
  99         0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 08-0F */
 100         0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
 101         0x0f, 0x10, 0x1b, 0x1d, '\r',   CN, 0x01, 0x13, /* scan 18-1F */
 102         0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
 103         0xff, 0x1c,   SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
 104         0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff,   SH, 0xff, /* scan 30-37 */
 105         0xff, 0xff,   CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
 106         0xff, 0xff, 0xff, 0xff, 0xff,   NM,   ST, 0xff, /* scan 40-47 */
 107         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
 108         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
 109         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
 110         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
 111         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
 112         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
 113         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
 114         '\r',   CN,  '/',  '*',  ' ',   ST, 0xff, 0xff, /* extended */
 115         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
 116         },
 117         { /* non numeric code */
 118            0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan 00-07 */
 119          '7',  '8',  '9',  '0',  '-',  '=', 0x08, '\t', /* scan 08-0F */
 120          'q',  'w',  'e',  'r',  't',  'y',  'u',  'i', /* scan 10-17 */
 121          'o',  'p',  '[',  ']', '\r',   CN,  'a',  's', /* scan 18-1F */
 122          'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';', /* scan 20-27 */
 123         '\'',  '`',   SH, '\\',  'z',  'x',  'c',  'v', /* scan 28-2F */
 124          'b',  'n',  'm',  ',',  '.',  '/',   SH,  '*', /* scan 30-37 */
 125          ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
 126            0,    0,    0,    0,    0,   NM,   ST,  'w', /* scan 40-47 */
 127          'x',  'y',  'l',  't',  'u',  'v',  'm',  'q', /* scan 48-4F */
 128          'r',  's',  'p',  'n',    0,    0,    0,    0, /* scan 50-57 */
 129            0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
 130            0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
 131            0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
 132            0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
 133            0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
 134         '\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
 135            0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
 136         },
 137         { /* right alt mode - not used in US keyboard */
 138         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
 139         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 08-0F */
 140         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
 141         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
 142         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
 143         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
 144         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
 145         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
 146         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
 147         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
 148         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
 149         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
 150         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
 151         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
 152         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
 153         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
 154         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
 155         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
 156         }
 157         },
 158         { /* German keyboard */
 159         { /* unshift code */
 160            0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan 00-07 */
 161          '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
 162          'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
 163          'o',  'p', 0x81,  '+', '\r',   CN,  'a',  's', /* scan 18-1F */
 164          'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
 165         0x84,  '^',   SH,  '#',  'y',  'x',  'c',  'v', /* scan 28-2F */
 166          'b',  'n',  'm',  ',',  '.',  '-',   SH,  '*', /* scan 30-37 */
 167          ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
 168            0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
 169          '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
 170          '2',  '3',  '0',  ',',    0,    0,  '<',    0, /* scan 50-57 */
 171            0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
 172            0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
 173            0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
 174            0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
 175            0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
 176         '\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
 177            0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
 178         },
 179         { /* shift code */
 180            0, 0x1b,  '!',  '"', 0x15,  '$',  '%',  '&', /* scan 00-07 */
 181          '/',  '(',  ')',  '=',  '?',  '`', 0x08, '\t', /* scan 08-0F */
 182          'Q',  'W',  'E',  'R',  'T',  'Z',  'U',  'I', /* scan 10-17 */
 183          'O',  'P', 0x9a,  '*', '\r',   CN,  'A',  'S', /* scan 18-1F */
 184          'D',  'F',  'G',  'H',  'J',  'K',  'L', 0x99, /* scan 20-27 */
 185         0x8e, 0xf8,   SH, '\'',  'Y',  'X',  'C',  'V', /* scan 28-2F */
 186          'B',  'N',  'M',  ';',  ':',  '_',   SH,  '*', /* scan 30-37 */
 187          ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
 188            0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
 189          '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
 190          '2',  '3',  '0',  ',',    0,    0,  '>',    0, /* scan 50-57 */
 191            0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
 192            0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
 193            0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
 194            0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
 195            0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
 196         '\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
 197            0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
 198         },
 199         { /* control code */
 200         0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
 201         0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 08-0F */
 202         0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
 203         0x0f, 0x10, 0x1b, 0x1d, '\r',   CN, 0x01, 0x13, /* scan 18-1F */
 204         0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
 205         0xff, 0x1c,   SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
 206         0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff,   SH, 0xff, /* scan 30-37 */
 207         0xff, 0xff,   CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
 208         0xff, 0xff, 0xff, 0xff, 0xff,   NM,   ST, 0xff, /* scan 40-47 */
 209         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
 210         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
 211         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
 212         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
 213         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
 214         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
 215         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
 216         '\r',   CN,  '/',  '*',  ' ',   ST, 0xff, 0xff, /* extended */
 217         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
 218         },
 219         { /* non numeric code */
 220            0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan 00-07 */
 221          '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
 222          'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
 223          'o',  'p', 0x81,  '+', '\r',   CN,  'a',  's', /* scan 18-1F */
 224          'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
 225         0x84,  '^',   SH,    0,  'y',  'x',  'c',  'v', /* scan 28-2F */
 226          'b',  'n',  'm',  ',',  '.',  '-',   SH,  '*', /* scan 30-37 */
 227          ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
 228            0,    0,    0,    0,    0,   NM,   ST,  'w', /* scan 40-47 */
 229          'x',  'y',  'l',  't',  'u',  'v',  'm',  'q', /* scan 48-4F */
 230          'r',  's',  'p',  'n',    0,    0,  '<',    0, /* scan 50-57 */
 231            0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
 232            0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
 233            0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
 234            0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
 235            0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
 236         '\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
 237            0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
 238         },
 239         { /* right alt mode - is used in German keyboard */
 240         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
 241          '{',  '[',  ']',  '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */
 242          '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
 243         0xff, 0xff, 0xff,  '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
 244         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
 245         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
 246         0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
 247         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
 248         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
 249         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
 250         0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '|', 0xff, /* scan 50-57 */
 251         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
 252         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
 253         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
 254         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
 255         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
 256         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
 257         0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
 258         }
 259         }
 260         };
 261
 262 static unsigned char ext_key_map[] = {
 263         0x1c, /* keypad enter */
 264         0x1d, /* right control */
 265         0x35, /* keypad slash */
 266         0x37, /* print screen */
 267         0x38, /* right alt */
 268         0x46, /* break */
 269         0x47, /* editpad home */
 270         0x48, /* editpad up */
 271         0x49, /* editpad pgup */
 272         0x4b, /* editpad left */
 273         0x4d, /* editpad right */
 274         0x4f, /* editpad end */
 275         0x50, /* editpad dn */
 276         0x51, /* editpad pgdn */
 277         0x52, /* editpad ins */
 278         0x53, /* editpad del */
 279         0x00  /* map end */
 280         };
 281
 282 static int kbd_input_empty(void)
 283 {
 284         int kbd_timeout = KBD_TIMEOUT * 1000;
 285
 286         while ((in8(I8042_STS_REG) & STATUS_IBF) && kbd_timeout--)
 287                 udelay(1);
 288
 289         return kbd_timeout != -1;
 290 }
 291
 292 static int kbd_output_full(void)
 293 {
 294         int kbd_timeout = KBD_TIMEOUT * 1000;
 295
 296         while (((in8(I8042_STS_REG) & STATUS_OBF) == 0) && kbd_timeout--)
 297                 udelay(1);
 298
 299         return kbd_timeout != -1;
 300 }
 301
 302 static void kbd_led_set(void)
 303 {
 304         kbd_input_empty();
 305         out8(I8042_DATA_REG, CMD_SET_KBD_LED);
 306         kbd_input_empty();
 307         out8(I8042_DATA_REG, (kbd_flags & 0x7));
 308 }
 309
 310 static void kbd_normal(unsigned char scan_code)
 311 {
 312         unsigned char chr;
 313
 314         if ((kbd_flags & BRK) == NORMAL) {
 315                 chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
 316                 if ((chr == 0xff) || (chr == 0x00))
 317                         return;
 318
 319                 /* if caps lock convert upper to lower */
 320                 if (((kbd_flags & CAPS) == CAPS) &&
 321                     (chr >= 'a' && chr <= 'z')) {
 322                         chr -= 'a' - 'A';
 323                 }
 324                 kbd_input = chr;
 325         }
 326 }
 327
 328 static void kbd_shift(unsigned char scan_code)
 329 {
 330         if ((kbd_flags & BRK) == BRK) {
 331                 kbd_state = AS;
 332                 kbd_flags &= (~SHIFT);
 333         } else {
 334                 kbd_state = SH;
 335                 kbd_flags |= SHIFT;
 336         }
 337 }
 338
 339 static void kbd_ctrl(unsigned char scan_code)
 340 {
 341         if ((kbd_flags & BRK) == BRK) {
 342                 kbd_state = AS;
 343                 kbd_flags &= (~CTRL);
 344         } else {
 345                 kbd_state = CN;
 346                 kbd_flags |= CTRL;
 347         }
 348 }
 349
 350 static void kbd_num(unsigned char scan_code)
 351 {
 352         if ((kbd_flags & BRK) == NORMAL) {
 353                 kbd_flags ^= NUM;
 354                 kbd_state = (kbd_flags & NUM) ? AS : NM;
 355                 kbd_led_set();
 356         }
 357 }
 358
 359 static void kbd_alt(unsigned char scan_code)
 360 {
 361         if ((kbd_flags & BRK) == BRK) {
 362                 kbd_state = AS;
 363                 kbd_flags &= (~ALT);
 364         } else {
 365                 kbd_state = AK;
 366                 kbd_flags &= ALT;
 367         }
 368 }
 369
 370 static void kbd_caps(unsigned char scan_code)
 371 {
 372         if ((kbd_flags & BRK) == NORMAL) {
 373                 kbd_flags ^= CAPS;
 374                 kbd_led_set();
 375         }
 376 }
 377
 378 static void kbd_scroll(unsigned char scan_code)
 379 {
 380         if ((kbd_flags & BRK) == NORMAL) {
 381                 kbd_flags ^= STP;
 382                 kbd_led_set();
 383                 if (kbd_flags & STP)
 384                         kbd_input = 0x13;
 385                 else
 386                         kbd_input = 0x11;
 387         }
 388 }
 389
 390 static void kbd_conv_char(unsigned char scan_code)
 391 {
 392         if (scan_code == 0xe0) {
 393                 kbd_flags |= EXT;
 394                 return;
 395         }
 396
 397         /* if high bit of scan_code, set break flag */
 398         if (scan_code & 0x80)
 399                 kbd_flags |=  BRK;
 400         else
 401                 kbd_flags &= ~BRK;
 402
 403         if ((scan_code == 0xe1) || (kbd_flags & E1)) {
 404                 if (scan_code == 0xe1) {
 405                         kbd_flags ^= BRK;       /* reset the break flag */
 406                         kbd_flags ^= E1;        /* bitwise EXOR with E1 flag */
 407                 }
 408                 return;
 409         }
 410
 411         scan_code &= 0x7f;
 412
 413         if (kbd_flags & EXT) {
 414                 int i;
 415
 416                 kbd_flags ^= EXT;
 417                 for (i = 0; ext_key_map[i]; i++) {
 418                         if (ext_key_map[i] == scan_code) {
 419                                 scan_code = 0x80 + i;
 420                                 break;
 421                         }
 422                 }
 423                 /* not found ? */
 424                 if (!ext_key_map[i])
 425                         return;
 426         }
 427
 428         switch (kbd_fct_map[scan_code]) {
 429         case AS:
 430                 kbd_normal(scan_code);
 431                 break;
 432         case SH:
 433                 kbd_shift(scan_code);
 434                 break;
 435         case CN:
 436                 kbd_ctrl(scan_code);
 437                 break;
 438         case NM:
 439                 kbd_num(scan_code);
 440                 break;
 441         case AK:
 442                 kbd_alt(scan_code);
 443                 break;
 444         case CP:
 445                 kbd_caps(scan_code);
 446                 break;
 447         case ST:
 448                 kbd_scroll(scan_code);
 449                 break;
 450         }
 451
 452         return;
 453 }
 454
 455 static int kbd_reset(void)
 456 {
 457         u8 config;
 458
 459         /* controller self test */
 460         if (kbd_input_empty() == 0)
 461                 return -1;
 462         out8(I8042_CMD_REG, CMD_SELF_TEST);
 463         if (kbd_output_full() == 0)
 464                 return -1;
 465         if (in8(I8042_DATA_REG) != KBC_TEST_OK)
 466                 return -1;
 467
 468         /* keyboard reset */
 469         if (kbd_input_empty() == 0)
 470                 return -1;
 471         out8(I8042_DATA_REG, CMD_RESET_KBD);
 472         if (kbd_output_full() == 0)
 473                 return -1;
 474         if (in8(I8042_DATA_REG) != KBD_ACK)
 475                 return -1;
 476         if (kbd_output_full() == 0)
 477                 return -1;
 478         if (in8(I8042_DATA_REG) != KBD_POR)
 479                 return -1;
 480
 481         /* set AT translation and disable irq */
 482         if (kbd_input_empty() == 0)
 483                 return -1;
 484         out8(I8042_CMD_REG, CMD_RD_CONFIG);
 485         if (kbd_output_full() == 0)
 486                 return -1;
 487         config = in8(I8042_DATA_REG);
 488         config |= CONFIG_AT_TRANS;
 489         config &= ~(CONFIG_KIRQ_EN | CONFIG_MIRQ_EN);
 490         if (kbd_input_empty() == 0)
 491                 return -1;
 492         out8(I8042_CMD_REG, CMD_WR_CONFIG);
 493         if (kbd_input_empty() == 0)
 494                 return -1;
 495         out8(I8042_DATA_REG, config);
 496
 497         /* enable keyboard */
 498         if (kbd_input_empty() == 0)
 499                 return -1;
 500         out8(I8042_CMD_REG, CMD_KBD_EN);
 501         if (kbd_input_empty() == 0)
 502                 return -1;
 503
 504         return 0;
 505 }
 506
 507 static int kbd_controller_present(void)
 508 {
 509         return in8(I8042_STS_REG) != 0xff;
 510 }
 511
 512 /*
 513  * Implement a weak default function for boards that optionally
 514  * need to skip the i8042 initialization.
 515  */
 516 int __weak board_i8042_skip(void)
 517 {
 518         /* As default, don't skip */
 519         return 0;
 520 }
 521
 522 void i8042_flush(void)
 523 {
 524         int timeout;
 525
 526         /*
 527          * The delay is to give the keyboard controller some time
 528          * to fill the next byte.
 529          */
 530         while (1) {
 531                 timeout = 100;  /* wait for no longer than 100us */
 532                 while (timeout > 0 && !(in8(I8042_STS_REG) & STATUS_OBF)) {
 533                         udelay(1);
 534                         timeout--;
 535                 }
 536
 537                 /* Try to pull next byte if not timeout */
 538                 if (in8(I8042_STS_REG) & STATUS_OBF)
 539                         in8(I8042_DATA_REG);
 540                 else
 541                         break;
 542         }
 543 }
 544
 545 int i8042_disable(void)
 546 {
 547         if (kbd_input_empty() == 0)
 548                 return -1;
 549
 550         /* Disable keyboard */
 551         out8(I8042_CMD_REG, CMD_KBD_DIS);
 552
 553         if (kbd_input_empty() == 0)
 554                 return -1;
 555
 556         return 0;
 557 }
 558
 559 /* i8042_kbd_init - reset keyboard and init state flags */
 560 int i8042_kbd_init(void)
 561 {
 562         int keymap, try;
 563         char *penv;
 564
 565         if (!kbd_controller_present() || board_i8042_skip()) {
 566                 debug("i8042 keyboard controller is not present\n");
 567                 return -1;
 568         }
 569
 570         /* Init keyboard device (default US layout) */
 571         keymap = KBD_US;
 572         penv = getenv("keymap");
 573         if (penv != NULL) {
 574                 if (strncmp(penv, "de", 3) == 0)
 575                         keymap = KBD_GER;
 576         }
 577
 578         for (try = 0; try < KBD_RESET_TRIES; try++) {
 579                 if (kbd_reset() == 0) {
 580                         kbd_mapping = keymap;
 581                         kbd_flags   = NORMAL;
 582                         kbd_state   = 0;
 583                         kbd_led_set();
 584
 585                         return 0;
 586                 }
 587         }
 588
 589         return -1;
 590 }
 591
 592 /*
 593  * i8042_tstc - test if keyboard input is available
 594  *
 595  * option: cursor blinking if called in a loop
 596  */
 597 int i8042_tstc(struct stdio_dev *dev)
 598 {
 599         unsigned char scan_code = 0;
 600
 601 #ifdef CONFIG_CONSOLE_CURSOR
 602         if (--blink_count == 0) {
 603                 cursor_state ^= 1;
 604                 console_cursor(cursor_state);
 605                 blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
 606                 udelay(10);
 607         }
 608 #endif
 609
 610         if ((in8(I8042_STS_REG) & STATUS_OBF) == 0) {
 611                 return 0;
 612         } else {
 613                 scan_code = in8(I8042_DATA_REG);
 614                 if (scan_code == 0xfa)
 615                         return 0;
 616
 617                 kbd_conv_char(scan_code);
 618
 619                 if (kbd_input != -1)
 620                         return 1;
 621         }
 622
 623         return 0;
 624 }
 625
 626 /*
 627  * i8042_getc - wait till keyboard input is available
 628  *
 629  * option: turn on/off cursor while waiting
 630  */
 631 int i8042_getc(struct stdio_dev *dev)
 632 {
 633         int ret_chr;
 634         unsigned char scan_code;
 635
 636         while (kbd_input == -1) {
 637                 while ((in8(I8042_STS_REG) & STATUS_OBF) == 0) {
 638 #ifdef CONFIG_CONSOLE_CURSOR
 639                         if (--blink_count == 0) {
 640                                 cursor_state ^= 1;
 641                                 console_cursor(cursor_state);
 642                                 blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
 643                         }
 644                         udelay(10);
 645 #endif
 646                 }
 647                 scan_code = in8(I8042_DATA_REG);
 648                 if (scan_code != 0xfa)
 649                         kbd_conv_char(scan_code);
 650         }
 651         ret_chr = kbd_input;
 652         kbd_input = -1;
 653
 654         return ret_chr;
 655 }