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