1 /* 2 * Translate key codes into ASCII 3 * 4 * Copyright (c) 2011 The Chromium OS Authors. 5 * (C) Copyright 2004 DENX Software Engineering, Wolfgang Denk, wd@denx.de 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <console.h> 12 #include <dm.h> 13 #include <errno.h> 14 #include <stdio_dev.h> 15 #include <input.h> 16 #ifdef CONFIG_DM_KEYBOARD 17 #include <keyboard.h> 18 #endif 19 #include <linux/input.h> 20 21 enum { 22 /* These correspond to the lights on the keyboard */ 23 FLAG_SCROLL_LOCK = 1 << 0, 24 FLAG_NUM_LOCK = 1 << 1, 25 FLAG_CAPS_LOCK = 1 << 2, 26 27 /* Special flag ORed with key code to indicate release */ 28 KEY_RELEASE = 1 << 15, 29 KEY_MASK = 0xfff, 30 }; 31 32 /* 33 * These takes map key codes to ASCII. 0xff means no key, or special key. 34 * Three tables are provided - one for plain keys, one for when the shift 35 * 'modifier' key is pressed and one for when the ctrl modifier key is 36 * pressed. 37 */ 38 static const uchar kbd_plain_xlate[] = { 39 0xff, 0x1b, '1', '2', '3', '4', '5', '6', 40 '7', '8', '9', '0', '-', '=', '\b', '\t', /* 0x00 - 0x0f */ 41 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 42 'o', 'p', '[', ']', '\r', 0xff, 'a', 's', /* 0x10 - 0x1f */ 43 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', 44 '\'', '`', 0xff, '\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */ 45 'b', 'n', 'm', ',' , '.', '/', 0xff, 0xff, 0xff, 46 ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x30 - 0x3f */ 47 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', 48 '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ 49 '2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff, 50 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x50 - 0x5F */ 51 '\r', 0xff, '/', '*', 52 }; 53 54 static unsigned char kbd_shift_xlate[] = { 55 0xff, 0x1b, '!', '@', '#', '$', '%', '^', 56 '&', '*', '(', ')', '_', '+', '\b', '\t', /* 0x00 - 0x0f */ 57 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 58 'O', 'P', '{', '}', '\r', 0xff, 'A', 'S', /* 0x10 - 0x1f */ 59 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', 60 '"', '~', 0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */ 61 'B', 'N', 'M', '<', '>', '?', 0xff, 0xff, 0xff, 62 ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x30 - 0x3f */ 63 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', 64 '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ 65 '2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff, 0xff, 66 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x50 - 0x5F */ 67 '\r', 0xff, '/', '*', 68 }; 69 70 static unsigned char kbd_ctrl_xlate[] = { 71 0xff, 0x1b, '1', 0x00, '3', '4', '5', 0x1E, 72 '7', '8', '9', '0', 0x1F, '=', '\b', '\t', /* 0x00 - 0x0f */ 73 0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, 74 0x0f, 0x10, 0x1b, 0x1d, '\n', 0xff, 0x01, 0x13, /* 0x10 - 0x1f */ 75 0x04, 0x06, 0x08, 0x09, 0x0a, 0x0b, 0x0c, ';', 76 '\'', '~', 0x00, 0x1c, 0x1a, 0x18, 0x03, 0x16, /* 0x20 - 0x2f */ 77 0x02, 0x0e, 0x0d, '<', '>', '?', 0xff, 0xff, 78 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x30 - 0x3f */ 79 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', 80 '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ 81 '2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff, 82 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x50 - 0x5F */ 83 '\r', 0xff, '/', '*', 84 }; 85 86 static const uchar kbd_plain_xlate_german[] = { 87 0xff, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */ 88 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */ 89 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */ 90 'o', 'p', 0x81, '+', '\r', 0xff, 'a', 's', /* scan 18-1F */ 91 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */ 92 0x84, '^', 0xff, '#', 'y', 'x', 'c', 'v', /* scan 28-2F */ 93 'b', 'n', 'm', ',', '.', '-', 0xff, '*', /* scan 30-37 */ 94 ' ', ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 95 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', /* scan 40-47 */ 96 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */ 97 '2', '3', '0', ',', 0xff, 0xff, '<', 0xff, /* scan 50-57 */ 98 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */ 99 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */ 100 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */ 101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */ 102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */ 103 '\r', 0xff, '/', '*', 104 }; 105 106 static unsigned char kbd_shift_xlate_german[] = { 107 0xff, 0x1b, '!', '"', 0x15, '$', '%', '&', /* scan 00-07 */ 108 '/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 08-0F */ 109 'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* scan 10-17 */ 110 'O', 'P', 0x9a, '*', '\r', 0xff, 'A', 'S', /* scan 18-1F */ 111 'D', 'F', 'G', 'H', 'J', 'K', 'L', 0x99, /* scan 20-27 */ 112 0x8e, 0xf8, 0xff, '\'', 'Y', 'X', 'C', 'V', /* scan 28-2F */ 113 'B', 'N', 'M', ';', ':', '_', 0xff, '*', /* scan 30-37 */ 114 ' ', ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 115 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', /* scan 40-47 */ 116 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */ 117 '2', '3', '0', ',', 0xff, 0xff, '>', 0xff, /* scan 50-57 */ 118 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */ 119 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */ 120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */ 121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */ 122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */ 123 '\r', 0xff, '/', '*', 124 }; 125 126 static unsigned char kbd_right_alt_xlate_german[] = { 127 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */ 128 '{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */ 129 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */ 130 0xff, 0xff, 0xff, '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */ 131 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */ 132 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */ 133 0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */ 134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 135 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */ 136 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */ 137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '|', 0xff, /* scan 50-57 */ 138 }; 139 140 enum kbd_mask { 141 KBD_ENGLISH = 1 << 0, 142 KBD_GERMAN = 1 << 1, 143 }; 144 145 static struct kbd_entry { 146 int kbd_mask; /* Which languages this is for */ 147 int left_keycode; /* Left keycode to select this map */ 148 int right_keycode; /* Right keycode to select this map */ 149 const uchar *xlate; /* Ascii code for each keycode */ 150 int num_entries; /* Number of entries in xlate */ 151 } kbd_entry[] = { 152 { KBD_ENGLISH, -1, -1, 153 kbd_plain_xlate, ARRAY_SIZE(kbd_plain_xlate) }, 154 { KBD_GERMAN, -1, -1, 155 kbd_plain_xlate_german, ARRAY_SIZE(kbd_plain_xlate_german) }, 156 { KBD_ENGLISH, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 157 kbd_shift_xlate, ARRAY_SIZE(kbd_shift_xlate) }, 158 { KBD_GERMAN, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 159 kbd_shift_xlate_german, ARRAY_SIZE(kbd_shift_xlate_german) }, 160 { KBD_ENGLISH | KBD_GERMAN, KEY_LEFTCTRL, KEY_RIGHTCTRL, 161 kbd_ctrl_xlate, ARRAY_SIZE(kbd_ctrl_xlate) }, 162 { KBD_GERMAN, -1, KEY_RIGHTALT, 163 kbd_right_alt_xlate_german, 164 ARRAY_SIZE(kbd_right_alt_xlate_german) }, 165 {}, 166 }; 167 168 /* 169 * Scan key code to ANSI 3.64 escape sequence table. This table is 170 * incomplete in that it does not include all possible extra keys. 171 */ 172 static struct { 173 int kbd_scan_code; 174 char *escape; 175 } kbd_to_ansi364[] = { 176 { KEY_UP, "\033[A"}, 177 { KEY_DOWN, "\033[B"}, 178 { KEY_RIGHT, "\033[C"}, 179 { KEY_LEFT, "\033[D"}, 180 }; 181 182 /* Maximum number of output characters that an ANSI sequence expands to */ 183 #define ANSI_CHAR_MAX 3 184 185 static int input_queue_ascii(struct input_config *config, int ch) 186 { 187 if (config->fifo_in + 1 == INPUT_BUFFER_LEN) { 188 if (!config->fifo_out) 189 return -1; /* buffer full */ 190 else 191 config->fifo_in = 0; 192 } else { 193 if (config->fifo_in + 1 == config->fifo_out) 194 return -1; /* buffer full */ 195 config->fifo_in++; 196 } 197 debug(" {%02x} ", ch); 198 config->fifo[config->fifo_in] = (uchar)ch; 199 200 return 0; 201 } 202 203 int input_tstc(struct input_config *config) 204 { 205 if (config->fifo_in == config->fifo_out && config->read_keys) { 206 if (!(*config->read_keys)(config)) 207 return 0; 208 } 209 return config->fifo_in != config->fifo_out; 210 } 211 212 int input_getc(struct input_config *config) 213 { 214 int err = 0; 215 216 while (config->fifo_in == config->fifo_out) { 217 if (config->read_keys) 218 err = (*config->read_keys)(config); 219 if (err) 220 return -1; 221 } 222 223 if (++config->fifo_out == INPUT_BUFFER_LEN) 224 config->fifo_out = 0; 225 226 return config->fifo[config->fifo_out]; 227 } 228 229 /** 230 * Process a modifier/special key press or release and decide which key 231 * translation array should be used as a result. 232 * 233 * TODO: Should keep track of modifier press/release 234 * 235 * @param config Input state 236 * @param key Key code to process 237 * @param release 0 if a press, 1 if a release 238 * @return pointer to keycode->ascii translation table that should be used 239 */ 240 static struct input_key_xlate *process_modifier(struct input_config *config, 241 int key, int release) 242 { 243 #ifdef CONFIG_DM_KEYBOARD 244 struct udevice *dev = config->dev; 245 struct keyboard_ops *ops = keyboard_get_ops(dev); 246 #endif 247 struct input_key_xlate *table; 248 int i; 249 250 /* Start with the main table, and see what modifiers change it */ 251 assert(config->num_tables > 0); 252 table = &config->table[0]; 253 for (i = 1; i < config->num_tables; i++) { 254 struct input_key_xlate *tab = &config->table[i]; 255 256 if (key == tab->left_keycode || key == tab->right_keycode) 257 table = tab; 258 } 259 260 /* Handle the lighted keys */ 261 if (!release) { 262 int flip = -1; 263 264 switch (key) { 265 case KEY_SCROLLLOCK: 266 flip = FLAG_SCROLL_LOCK; 267 break; 268 case KEY_NUMLOCK: 269 flip = FLAG_NUM_LOCK; 270 break; 271 case KEY_CAPSLOCK: 272 flip = FLAG_CAPS_LOCK; 273 break; 274 } 275 276 if (flip != -1) { 277 int leds = 0; 278 279 config->flags ^= flip; 280 if (config->flags & FLAG_NUM_LOCK) 281 leds |= INPUT_LED_NUM; 282 if (config->flags & FLAG_CAPS_LOCK) 283 leds |= INPUT_LED_CAPS; 284 if (config->flags & FLAG_SCROLL_LOCK) 285 leds |= INPUT_LED_SCROLL; 286 config->leds = leds; 287 config->leds_changed = flip; 288 289 #ifdef CONFIG_DM_KEYBOARD 290 if (ops->update_leds) { 291 if (ops->update_leds(dev, config->leds)) 292 debug("Update keyboard's LED failed\n"); 293 } 294 #endif 295 } 296 } 297 298 return table; 299 } 300 301 /** 302 * Search an int array for a key value 303 * 304 * @param array Array to search 305 * @param count Number of elements in array 306 * @param key Key value to find 307 * @return element where value was first found, -1 if none 308 */ 309 static int array_search(int *array, int count, int key) 310 { 311 int i; 312 313 for (i = 0; i < count; i++) { 314 if (array[i] == key) 315 return i; 316 } 317 318 return -1; 319 } 320 321 /** 322 * Sort an array so that those elements that exist in the ordering are 323 * first in the array, and in the same order as the ordering. The algorithm 324 * is O(count * ocount) and designed for small arrays. 325 * 326 * TODO: Move this to common / lib? 327 * 328 * @param dest Array with elements to sort, also destination array 329 * @param count Number of elements to sort 330 * @param order Array containing ordering elements 331 * @param ocount Number of ordering elements 332 * @return number of elements in dest that are in order (these will be at the 333 * start of dest). 334 */ 335 static int sort_array_by_ordering(int *dest, int count, int *order, 336 int ocount) 337 { 338 int temp[count]; 339 int dest_count; 340 int same; /* number of elements which are the same */ 341 int i; 342 343 /* setup output items, copy items to be sorted into our temp area */ 344 memcpy(temp, dest, count * sizeof(*dest)); 345 dest_count = 0; 346 347 /* work through the ordering, move over the elements we agree on */ 348 for (i = 0; i < ocount; i++) { 349 if (array_search(temp, count, order[i]) != -1) 350 dest[dest_count++] = order[i]; 351 } 352 same = dest_count; 353 354 /* now move over the elements that are not in the ordering */ 355 for (i = 0; i < count; i++) { 356 if (array_search(order, ocount, temp[i]) == -1) 357 dest[dest_count++] = temp[i]; 358 } 359 assert(dest_count == count); 360 return same; 361 } 362 363 /** 364 * Check a list of key codes against the previous key scan 365 * 366 * Given a list of new key codes, we check how many of these are the same 367 * as last time. 368 * 369 * @param config Input state 370 * @param keycode List of key codes to examine 371 * @param num_keycodes Number of key codes 372 * @param same Returns number of key codes which are the same 373 */ 374 static int input_check_keycodes(struct input_config *config, 375 int keycode[], int num_keycodes, int *same) 376 { 377 /* Select the 'plain' xlate table to start with */ 378 if (!config->num_tables) { 379 debug("%s: No xlate tables: cannot decode keys\n", __func__); 380 return -1; 381 } 382 383 /* sort the keycodes into the same order as the previous ones */ 384 *same = sort_array_by_ordering(keycode, num_keycodes, 385 config->prev_keycodes, config->num_prev_keycodes); 386 387 memcpy(config->prev_keycodes, keycode, num_keycodes * sizeof(int)); 388 config->num_prev_keycodes = num_keycodes; 389 390 return *same != num_keycodes; 391 } 392 393 /** 394 * Checks and converts a special key code into ANSI 3.64 escape sequence. 395 * 396 * @param config Input state 397 * @param keycode Key code to examine 398 * @param output_ch Buffer to place output characters into. It should 399 * be at least ANSI_CHAR_MAX bytes long, to allow for 400 * an ANSI sequence. 401 * @param max_chars Maximum number of characters to add to output_ch 402 * @return number of characters output, if the key was converted, otherwise 0. 403 * This may be larger than max_chars, in which case the overflow 404 * characters are not output. 405 */ 406 static int input_keycode_to_ansi364(struct input_config *config, 407 int keycode, char output_ch[], int max_chars) 408 { 409 const char *escape; 410 int ch_count; 411 int i; 412 413 for (i = ch_count = 0; i < ARRAY_SIZE(kbd_to_ansi364); i++) { 414 if (keycode != kbd_to_ansi364[i].kbd_scan_code) 415 continue; 416 for (escape = kbd_to_ansi364[i].escape; *escape; escape++) { 417 if (ch_count < max_chars) 418 output_ch[ch_count] = *escape; 419 ch_count++; 420 } 421 return ch_count; 422 } 423 424 return 0; 425 } 426 427 /** 428 * Converts and queues a list of key codes in escaped ASCII string form 429 * Convert a list of key codes into ASCII 430 * 431 * You must call input_check_keycodes() before this. It turns the keycode 432 * list into a list of ASCII characters and sends them to the input layer. 433 * 434 * Characters which were seen last time do not generate fresh ASCII output. 435 * The output (calls to queue_ascii) may be longer than num_keycodes, if the 436 * keycode contains special keys that was encoded to longer escaped sequence. 437 * 438 * @param config Input state 439 * @param keycode List of key codes to examine 440 * @param num_keycodes Number of key codes 441 * @param output_ch Buffer to place output characters into. It should 442 * be at last ANSI_CHAR_MAX * num_keycodes, to allow for 443 * ANSI sequences. 444 * @param max_chars Maximum number of characters to add to output_ch 445 * @param same Number of key codes which are the same 446 * @return number of characters written into output_ch, or -1 if we would 447 * exceed max_chars chars. 448 */ 449 static int input_keycodes_to_ascii(struct input_config *config, 450 int keycode[], int num_keycodes, char output_ch[], 451 int max_chars, int same) 452 { 453 struct input_key_xlate *table; 454 int ch_count = 0; 455 int i; 456 457 table = &config->table[0]; 458 459 /* deal with modifiers first */ 460 for (i = 0; i < num_keycodes; i++) { 461 int key = keycode[i] & KEY_MASK; 462 463 if (key >= table->num_entries || table->xlate[key] == 0xff) { 464 table = process_modifier(config, key, 465 keycode[i] & KEY_RELEASE); 466 } 467 } 468 469 /* Start conversion by looking for the first new keycode (by same). */ 470 for (i = same; i < num_keycodes; i++) { 471 int key = keycode[i]; 472 int ch; 473 474 /* 475 * For a normal key (with an ASCII value), add it; otherwise 476 * translate special key to escape sequence if possible. 477 */ 478 if (key < table->num_entries) { 479 ch = table->xlate[key]; 480 if ((config->flags & FLAG_CAPS_LOCK) && 481 ch >= 'a' && ch <= 'z') 482 ch -= 'a' - 'A'; 483 /* ban digit numbers if 'Num Lock' is not on */ 484 if (!(config->flags & FLAG_NUM_LOCK)) { 485 if (key >= KEY_KP7 && key <= KEY_KPDOT && 486 key != KEY_KPMINUS && key != KEY_KPPLUS) 487 ch = 0xff; 488 } 489 if (ch_count < max_chars && ch != 0xff) 490 output_ch[ch_count++] = (uchar)ch; 491 } else { 492 ch_count += input_keycode_to_ansi364(config, key, 493 output_ch, max_chars); 494 } 495 } 496 497 if (ch_count > max_chars) { 498 debug("%s: Output char buffer overflow size=%d, need=%d\n", 499 __func__, max_chars, ch_count); 500 return -1; 501 } 502 503 /* ok, so return keys */ 504 return ch_count; 505 } 506 507 static int _input_send_keycodes(struct input_config *config, int keycode[], 508 int num_keycodes, bool do_send) 509 { 510 char ch[num_keycodes * ANSI_CHAR_MAX]; 511 int count, i, same = 0; 512 int is_repeat = 0; 513 unsigned delay_ms; 514 515 config->modifiers = 0; 516 if (!input_check_keycodes(config, keycode, num_keycodes, &same)) { 517 /* 518 * Same as last time - is it time for another repeat? 519 * TODO(sjg@chromium.org) We drop repeats here and since 520 * the caller may not call in again for a while, our 521 * auto-repeat speed is not quite correct. We should 522 * insert another character if we later realise that we 523 * have missed a repeat slot. 524 */ 525 is_repeat = config->allow_repeats || (config->repeat_rate_ms && 526 (int)get_timer(config->next_repeat_ms) >= 0); 527 if (!is_repeat) 528 return 0; 529 } 530 531 count = input_keycodes_to_ascii(config, keycode, num_keycodes, 532 ch, sizeof(ch), is_repeat ? 0 : same); 533 if (do_send) { 534 for (i = 0; i < count; i++) 535 input_queue_ascii(config, ch[i]); 536 } 537 delay_ms = is_repeat ? 538 config->repeat_rate_ms : 539 config->repeat_delay_ms; 540 541 config->next_repeat_ms = get_timer(0) + delay_ms; 542 543 return count; 544 } 545 546 int input_send_keycodes(struct input_config *config, int keycode[], 547 int num_keycodes) 548 { 549 return _input_send_keycodes(config, keycode, num_keycodes, true); 550 } 551 552 int input_add_keycode(struct input_config *config, int new_keycode, 553 bool release) 554 { 555 int keycode[INPUT_MAX_MODIFIERS + 1]; 556 int count, i; 557 558 /* Add the old keycodes which are not removed by this new one */ 559 for (i = 0, count = 0; i < config->num_prev_keycodes; i++) { 560 int code = config->prev_keycodes[i]; 561 562 if (new_keycode == code) { 563 if (release) 564 continue; 565 new_keycode = -1; 566 } 567 keycode[count++] = code; 568 } 569 570 if (!release && new_keycode != -1) 571 keycode[count++] = new_keycode; 572 debug("\ncodes for %02x/%d: ", new_keycode, release); 573 for (i = 0; i < count; i++) 574 debug("%02x ", keycode[i]); 575 debug("\n"); 576 577 /* Don't output any ASCII characters if this is a key release */ 578 return _input_send_keycodes(config, keycode, count, !release); 579 } 580 581 int input_add_table(struct input_config *config, int left_keycode, 582 int right_keycode, const uchar *xlate, int num_entries) 583 { 584 struct input_key_xlate *table; 585 586 if (config->num_tables == INPUT_MAX_MODIFIERS) { 587 debug("%s: Too many modifier tables\n", __func__); 588 return -1; 589 } 590 591 table = &config->table[config->num_tables++]; 592 table->left_keycode = left_keycode; 593 table->right_keycode = right_keycode; 594 table->xlate = xlate; 595 table->num_entries = num_entries; 596 597 return 0; 598 } 599 600 void input_set_delays(struct input_config *config, int repeat_delay_ms, 601 int repeat_rate_ms) 602 { 603 config->repeat_delay_ms = repeat_delay_ms; 604 config->repeat_rate_ms = repeat_rate_ms; 605 } 606 607 void input_allow_repeats(struct input_config *config, bool allow_repeats) 608 { 609 config->allow_repeats = allow_repeats; 610 } 611 612 int input_leds_changed(struct input_config *config) 613 { 614 if (config->leds_changed) 615 return config->leds; 616 617 return -1; 618 } 619 620 int input_add_tables(struct input_config *config, bool german) 621 { 622 struct kbd_entry *entry; 623 int mask; 624 int ret; 625 626 mask = german ? KBD_GERMAN : KBD_ENGLISH; 627 for (entry = kbd_entry; entry->kbd_mask; entry++) { 628 if (!(mask & entry->kbd_mask)) 629 continue; 630 ret = input_add_table(config, entry->left_keycode, 631 entry->right_keycode, entry->xlate, 632 entry->num_entries); 633 if (ret) 634 return ret; 635 } 636 637 return 0; 638 } 639 640 int input_init(struct input_config *config, int leds) 641 { 642 memset(config, '\0', sizeof(*config)); 643 config->leds = leds; 644 645 return 0; 646 } 647 648 int input_stdio_register(struct stdio_dev *dev) 649 { 650 int error; 651 652 error = stdio_register(dev); 653 654 /* check if this is the standard input device */ 655 if (!error && strcmp(env_get("stdin"), dev->name) == 0) { 656 /* reassign the console */ 657 if (OVERWRITE_CONSOLE || 658 console_assign(stdin, dev->name)) 659 return -1; 660 } 661 662 return 0; 663 } 664