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 } 656