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 /* 87 * German keymap. Special letters are mapped according to code page 437. 88 */ 89 static const uchar kbd_plain_xlate_german[] = { 90 0xff, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */ 91 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */ 92 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */ 93 'o', 'p', 0x81, '+', '\r', 0xff, 'a', 's', /* scan 18-1F */ 94 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */ 95 0x84, '^', 0xff, '#', 'y', 'x', 'c', 'v', /* scan 28-2F */ 96 'b', 'n', 'm', ',', '.', '-', 0xff, '*', /* scan 30-37 */ 97 ' ', ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 98 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', /* scan 40-47 */ 99 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */ 100 '2', '3', '0', ',', 0xff, 0xff, '<', 0xff, /* scan 50-57 */ 101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */ 102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */ 103 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */ 104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */ 105 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */ 106 '\r', 0xff, '/', '*', 107 }; 108 109 static unsigned char kbd_shift_xlate_german[] = { 110 0xff, 0x1b, '!', '"', 0x15, '$', '%', '&', /* scan 00-07 */ 111 '/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 08-0F */ 112 'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* scan 10-17 */ 113 'O', 'P', 0x9a, '*', '\r', 0xff, 'A', 'S', /* scan 18-1F */ 114 'D', 'F', 'G', 'H', 'J', 'K', 'L', 0x99, /* scan 20-27 */ 115 0x8e, 0xf8, 0xff, '\'', 'Y', 'X', 'C', 'V', /* scan 28-2F */ 116 'B', 'N', 'M', ';', ':', '_', 0xff, '*', /* scan 30-37 */ 117 ' ', ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 118 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', /* scan 40-47 */ 119 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */ 120 '2', '3', '0', ',', 0xff, 0xff, '>', 0xff, /* scan 50-57 */ 121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */ 122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */ 123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */ 124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */ 125 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */ 126 '\r', 0xff, '/', '*', 127 }; 128 129 static unsigned char kbd_right_alt_xlate_german[] = { 130 0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */ 131 '{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */ 132 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */ 133 0xff, 0xff, 0xff, '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */ 134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */ 135 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */ 136 0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */ 137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */ 139 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */ 140 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '|', 0xff, /* scan 50-57 */ 141 }; 142 143 enum kbd_mask { 144 KBD_ENGLISH = 1 << 0, 145 KBD_GERMAN = 1 << 1, 146 }; 147 148 static struct kbd_entry { 149 int kbd_mask; /* Which languages this is for */ 150 int left_keycode; /* Left keycode to select this map */ 151 int right_keycode; /* Right keycode to select this map */ 152 const uchar *xlate; /* Ascii code for each keycode */ 153 int num_entries; /* Number of entries in xlate */ 154 } kbd_entry[] = { 155 { KBD_ENGLISH, -1, -1, 156 kbd_plain_xlate, ARRAY_SIZE(kbd_plain_xlate) }, 157 { KBD_GERMAN, -1, -1, 158 kbd_plain_xlate_german, ARRAY_SIZE(kbd_plain_xlate_german) }, 159 { KBD_ENGLISH, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 160 kbd_shift_xlate, ARRAY_SIZE(kbd_shift_xlate) }, 161 { KBD_GERMAN, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 162 kbd_shift_xlate_german, ARRAY_SIZE(kbd_shift_xlate_german) }, 163 { KBD_ENGLISH | KBD_GERMAN, KEY_LEFTCTRL, KEY_RIGHTCTRL, 164 kbd_ctrl_xlate, ARRAY_SIZE(kbd_ctrl_xlate) }, 165 { KBD_GERMAN, -1, KEY_RIGHTALT, 166 kbd_right_alt_xlate_german, 167 ARRAY_SIZE(kbd_right_alt_xlate_german) }, 168 {}, 169 }; 170 171 /* 172 * Scan key code to ANSI 3.64 escape sequence table. This table is 173 * incomplete in that it does not include all possible extra keys. 174 */ 175 static struct { 176 int kbd_scan_code; 177 char *escape; 178 } kbd_to_ansi364[] = { 179 { KEY_UP, "\033[A"}, 180 { KEY_DOWN, "\033[B"}, 181 { KEY_RIGHT, "\033[C"}, 182 { KEY_LEFT, "\033[D"}, 183 }; 184 185 /* Maximum number of output characters that an ANSI sequence expands to */ 186 #define ANSI_CHAR_MAX 3 187 188 static int input_queue_ascii(struct input_config *config, int ch) 189 { 190 if (config->fifo_in + 1 == INPUT_BUFFER_LEN) { 191 if (!config->fifo_out) 192 return -1; /* buffer full */ 193 else 194 config->fifo_in = 0; 195 } else { 196 if (config->fifo_in + 1 == config->fifo_out) 197 return -1; /* buffer full */ 198 config->fifo_in++; 199 } 200 debug(" {%02x} ", ch); 201 config->fifo[config->fifo_in] = (uchar)ch; 202 203 return 0; 204 } 205 206 int input_tstc(struct input_config *config) 207 { 208 if (config->fifo_in == config->fifo_out && config->read_keys) { 209 if (!(*config->read_keys)(config)) 210 return 0; 211 } 212 return config->fifo_in != config->fifo_out; 213 } 214 215 int input_getc(struct input_config *config) 216 { 217 int err = 0; 218 219 while (config->fifo_in == config->fifo_out) { 220 if (config->read_keys) 221 err = (*config->read_keys)(config); 222 if (err) 223 return -1; 224 } 225 226 if (++config->fifo_out == INPUT_BUFFER_LEN) 227 config->fifo_out = 0; 228 229 return config->fifo[config->fifo_out]; 230 } 231 232 /** 233 * Process a modifier/special key press or release and decide which key 234 * translation array should be used as a result. 235 * 236 * TODO: Should keep track of modifier press/release 237 * 238 * @param config Input state 239 * @param key Key code to process 240 * @param release 0 if a press, 1 if a release 241 * @return pointer to keycode->ascii translation table that should be used 242 */ 243 static struct input_key_xlate *process_modifier(struct input_config *config, 244 int key, int release) 245 { 246 #ifdef CONFIG_DM_KEYBOARD 247 struct udevice *dev = config->dev; 248 struct keyboard_ops *ops = keyboard_get_ops(dev); 249 #endif 250 struct input_key_xlate *table; 251 int i; 252 253 /* Start with the main table, and see what modifiers change it */ 254 assert(config->num_tables > 0); 255 table = &config->table[0]; 256 for (i = 1; i < config->num_tables; i++) { 257 struct input_key_xlate *tab = &config->table[i]; 258 259 if (key == tab->left_keycode || key == tab->right_keycode) 260 table = tab; 261 } 262 263 /* Handle the lighted keys */ 264 if (!release) { 265 int flip = -1; 266 267 switch (key) { 268 case KEY_SCROLLLOCK: 269 flip = FLAG_SCROLL_LOCK; 270 break; 271 case KEY_NUMLOCK: 272 flip = FLAG_NUM_LOCK; 273 break; 274 case KEY_CAPSLOCK: 275 flip = FLAG_CAPS_LOCK; 276 break; 277 } 278 279 if (flip != -1) { 280 int leds = 0; 281 282 config->flags ^= flip; 283 if (config->flags & FLAG_NUM_LOCK) 284 leds |= INPUT_LED_NUM; 285 if (config->flags & FLAG_CAPS_LOCK) 286 leds |= INPUT_LED_CAPS; 287 if (config->flags & FLAG_SCROLL_LOCK) 288 leds |= INPUT_LED_SCROLL; 289 config->leds = leds; 290 config->leds_changed = flip; 291 292 #ifdef CONFIG_DM_KEYBOARD 293 if (ops->update_leds) { 294 if (ops->update_leds(dev, config->leds)) 295 debug("Update keyboard's LED failed\n"); 296 } 297 #endif 298 } 299 } 300 301 return table; 302 } 303 304 /** 305 * Search an int array for a key value 306 * 307 * @param array Array to search 308 * @param count Number of elements in array 309 * @param key Key value to find 310 * @return element where value was first found, -1 if none 311 */ 312 static int array_search(int *array, int count, int key) 313 { 314 int i; 315 316 for (i = 0; i < count; i++) { 317 if (array[i] == key) 318 return i; 319 } 320 321 return -1; 322 } 323 324 /** 325 * Sort an array so that those elements that exist in the ordering are 326 * first in the array, and in the same order as the ordering. The algorithm 327 * is O(count * ocount) and designed for small arrays. 328 * 329 * TODO: Move this to common / lib? 330 * 331 * @param dest Array with elements to sort, also destination array 332 * @param count Number of elements to sort 333 * @param order Array containing ordering elements 334 * @param ocount Number of ordering elements 335 * @return number of elements in dest that are in order (these will be at the 336 * start of dest). 337 */ 338 static int sort_array_by_ordering(int *dest, int count, int *order, 339 int ocount) 340 { 341 int temp[count]; 342 int dest_count; 343 int same; /* number of elements which are the same */ 344 int i; 345 346 /* setup output items, copy items to be sorted into our temp area */ 347 memcpy(temp, dest, count * sizeof(*dest)); 348 dest_count = 0; 349 350 /* work through the ordering, move over the elements we agree on */ 351 for (i = 0; i < ocount; i++) { 352 if (array_search(temp, count, order[i]) != -1) 353 dest[dest_count++] = order[i]; 354 } 355 same = dest_count; 356 357 /* now move over the elements that are not in the ordering */ 358 for (i = 0; i < count; i++) { 359 if (array_search(order, ocount, temp[i]) == -1) 360 dest[dest_count++] = temp[i]; 361 } 362 assert(dest_count == count); 363 return same; 364 } 365 366 /** 367 * Check a list of key codes against the previous key scan 368 * 369 * Given a list of new key codes, we check how many of these are the same 370 * as last time. 371 * 372 * @param config Input state 373 * @param keycode List of key codes to examine 374 * @param num_keycodes Number of key codes 375 * @param same Returns number of key codes which are the same 376 */ 377 static int input_check_keycodes(struct input_config *config, 378 int keycode[], int num_keycodes, int *same) 379 { 380 /* Select the 'plain' xlate table to start with */ 381 if (!config->num_tables) { 382 debug("%s: No xlate tables: cannot decode keys\n", __func__); 383 return -1; 384 } 385 386 /* sort the keycodes into the same order as the previous ones */ 387 *same = sort_array_by_ordering(keycode, num_keycodes, 388 config->prev_keycodes, config->num_prev_keycodes); 389 390 memcpy(config->prev_keycodes, keycode, num_keycodes * sizeof(int)); 391 config->num_prev_keycodes = num_keycodes; 392 393 return *same != num_keycodes; 394 } 395 396 /** 397 * Checks and converts a special key code into ANSI 3.64 escape sequence. 398 * 399 * @param config Input state 400 * @param keycode Key code to examine 401 * @param output_ch Buffer to place output characters into. It should 402 * be at least ANSI_CHAR_MAX bytes long, to allow for 403 * an ANSI sequence. 404 * @param max_chars Maximum number of characters to add to output_ch 405 * @return number of characters output, if the key was converted, otherwise 0. 406 * This may be larger than max_chars, in which case the overflow 407 * characters are not output. 408 */ 409 static int input_keycode_to_ansi364(struct input_config *config, 410 int keycode, char output_ch[], int max_chars) 411 { 412 const char *escape; 413 int ch_count; 414 int i; 415 416 for (i = ch_count = 0; i < ARRAY_SIZE(kbd_to_ansi364); i++) { 417 if (keycode != kbd_to_ansi364[i].kbd_scan_code) 418 continue; 419 for (escape = kbd_to_ansi364[i].escape; *escape; escape++) { 420 if (ch_count < max_chars) 421 output_ch[ch_count] = *escape; 422 ch_count++; 423 } 424 return ch_count; 425 } 426 427 return 0; 428 } 429 430 /** 431 * Converts and queues a list of key codes in escaped ASCII string form 432 * Convert a list of key codes into ASCII 433 * 434 * You must call input_check_keycodes() before this. It turns the keycode 435 * list into a list of ASCII characters and sends them to the input layer. 436 * 437 * Characters which were seen last time do not generate fresh ASCII output. 438 * The output (calls to queue_ascii) may be longer than num_keycodes, if the 439 * keycode contains special keys that was encoded to longer escaped sequence. 440 * 441 * @param config Input state 442 * @param keycode List of key codes to examine 443 * @param num_keycodes Number of key codes 444 * @param output_ch Buffer to place output characters into. It should 445 * be at last ANSI_CHAR_MAX * num_keycodes, to allow for 446 * ANSI sequences. 447 * @param max_chars Maximum number of characters to add to output_ch 448 * @param same Number of key codes which are the same 449 * @return number of characters written into output_ch, or -1 if we would 450 * exceed max_chars chars. 451 */ 452 static int input_keycodes_to_ascii(struct input_config *config, 453 int keycode[], int num_keycodes, char output_ch[], 454 int max_chars, int same) 455 { 456 struct input_key_xlate *table; 457 int ch_count = 0; 458 int i; 459 460 table = &config->table[0]; 461 462 /* deal with modifiers first */ 463 for (i = 0; i < num_keycodes; i++) { 464 int key = keycode[i] & KEY_MASK; 465 466 if (key >= table->num_entries || table->xlate[key] == 0xff) { 467 table = process_modifier(config, key, 468 keycode[i] & KEY_RELEASE); 469 } 470 } 471 472 /* Start conversion by looking for the first new keycode (by same). */ 473 for (i = same; i < num_keycodes; i++) { 474 int key = keycode[i]; 475 int ch; 476 477 /* 478 * For a normal key (with an ASCII value), add it; otherwise 479 * translate special key to escape sequence if possible. 480 */ 481 if (key < table->num_entries) { 482 ch = table->xlate[key]; 483 if ((config->flags & FLAG_CAPS_LOCK) && 484 ch >= 'a' && ch <= 'z') 485 ch -= 'a' - 'A'; 486 /* ban digit numbers if 'Num Lock' is not on */ 487 if (!(config->flags & FLAG_NUM_LOCK)) { 488 if (key >= KEY_KP7 && key <= KEY_KPDOT && 489 key != KEY_KPMINUS && key != KEY_KPPLUS) 490 ch = 0xff; 491 } 492 if (ch_count < max_chars && ch != 0xff) 493 output_ch[ch_count++] = (uchar)ch; 494 } else { 495 ch_count += input_keycode_to_ansi364(config, key, 496 output_ch, max_chars); 497 } 498 } 499 500 if (ch_count > max_chars) { 501 debug("%s: Output char buffer overflow size=%d, need=%d\n", 502 __func__, max_chars, ch_count); 503 return -1; 504 } 505 506 /* ok, so return keys */ 507 return ch_count; 508 } 509 510 static int _input_send_keycodes(struct input_config *config, int keycode[], 511 int num_keycodes, bool do_send) 512 { 513 char ch[num_keycodes * ANSI_CHAR_MAX]; 514 int count, i, same = 0; 515 int is_repeat = 0; 516 unsigned delay_ms; 517 518 config->modifiers = 0; 519 if (!input_check_keycodes(config, keycode, num_keycodes, &same)) { 520 /* 521 * Same as last time - is it time for another repeat? 522 * TODO(sjg@chromium.org) We drop repeats here and since 523 * the caller may not call in again for a while, our 524 * auto-repeat speed is not quite correct. We should 525 * insert another character if we later realise that we 526 * have missed a repeat slot. 527 */ 528 is_repeat = config->allow_repeats || (config->repeat_rate_ms && 529 (int)get_timer(config->next_repeat_ms) >= 0); 530 if (!is_repeat) 531 return 0; 532 } 533 534 count = input_keycodes_to_ascii(config, keycode, num_keycodes, 535 ch, sizeof(ch), is_repeat ? 0 : same); 536 if (do_send) { 537 for (i = 0; i < count; i++) 538 input_queue_ascii(config, ch[i]); 539 } 540 delay_ms = is_repeat ? 541 config->repeat_rate_ms : 542 config->repeat_delay_ms; 543 544 config->next_repeat_ms = get_timer(0) + delay_ms; 545 546 return count; 547 } 548 549 int input_send_keycodes(struct input_config *config, int keycode[], 550 int num_keycodes) 551 { 552 return _input_send_keycodes(config, keycode, num_keycodes, true); 553 } 554 555 int input_add_keycode(struct input_config *config, int new_keycode, 556 bool release) 557 { 558 int keycode[INPUT_MAX_MODIFIERS + 1]; 559 int count, i; 560 561 /* Add the old keycodes which are not removed by this new one */ 562 for (i = 0, count = 0; i < config->num_prev_keycodes; i++) { 563 int code = config->prev_keycodes[i]; 564 565 if (new_keycode == code) { 566 if (release) 567 continue; 568 new_keycode = -1; 569 } 570 keycode[count++] = code; 571 } 572 573 if (!release && new_keycode != -1) 574 keycode[count++] = new_keycode; 575 debug("\ncodes for %02x/%d: ", new_keycode, release); 576 for (i = 0; i < count; i++) 577 debug("%02x ", keycode[i]); 578 debug("\n"); 579 580 /* Don't output any ASCII characters if this is a key release */ 581 return _input_send_keycodes(config, keycode, count, !release); 582 } 583 584 int input_add_table(struct input_config *config, int left_keycode, 585 int right_keycode, const uchar *xlate, int num_entries) 586 { 587 struct input_key_xlate *table; 588 589 if (config->num_tables == INPUT_MAX_MODIFIERS) { 590 debug("%s: Too many modifier tables\n", __func__); 591 return -1; 592 } 593 594 table = &config->table[config->num_tables++]; 595 table->left_keycode = left_keycode; 596 table->right_keycode = right_keycode; 597 table->xlate = xlate; 598 table->num_entries = num_entries; 599 600 return 0; 601 } 602 603 void input_set_delays(struct input_config *config, int repeat_delay_ms, 604 int repeat_rate_ms) 605 { 606 config->repeat_delay_ms = repeat_delay_ms; 607 config->repeat_rate_ms = repeat_rate_ms; 608 } 609 610 void input_allow_repeats(struct input_config *config, bool allow_repeats) 611 { 612 config->allow_repeats = allow_repeats; 613 } 614 615 int input_leds_changed(struct input_config *config) 616 { 617 if (config->leds_changed) 618 return config->leds; 619 620 return -1; 621 } 622 623 int input_add_tables(struct input_config *config, bool german) 624 { 625 struct kbd_entry *entry; 626 int mask; 627 int ret; 628 629 mask = german ? KBD_GERMAN : KBD_ENGLISH; 630 for (entry = kbd_entry; entry->kbd_mask; entry++) { 631 if (!(mask & entry->kbd_mask)) 632 continue; 633 ret = input_add_table(config, entry->left_keycode, 634 entry->right_keycode, entry->xlate, 635 entry->num_entries); 636 if (ret) 637 return ret; 638 } 639 640 return 0; 641 } 642 643 int input_init(struct input_config *config, int leds) 644 { 645 memset(config, '\0', sizeof(*config)); 646 config->leds = leds; 647 648 return 0; 649 } 650 651 int input_stdio_register(struct stdio_dev *dev) 652 { 653 int error; 654 655 error = stdio_register(dev); 656 657 /* check if this is the standard input device */ 658 if (!error && strcmp(env_get("stdin"), dev->name) == 0) { 659 /* reassign the console */ 660 if (OVERWRITE_CONSOLE || 661 console_assign(stdin, dev->name)) 662 return -1; 663 } 664 665 return 0; 666 } 667