1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Translate key codes into ASCII 4 * 5 * Copyright (c) 2011 The Chromium OS Authors. 6 * (C) Copyright 2004 DENX Software Engineering, Wolfgang Denk, wd (at) denx.de 7 */ 8 9 #include <common.h> 10 #include <console.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 /* 86 * German keymap. Special letters are mapped according to code page 437. 87 */ 88 static const uchar kbd_plain_xlate_german[] = { 89 0xff, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */ 90 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */ 91 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */ 92 'o', 'p', 0x81, '+', '\r', 0xff, 'a', 's', /* scan 18-1F */ 93 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */ 94 0x84, '^', 0xff, '#', 'y', 'x', 'c', 'v', /* scan 28-2F */ 95 'b', 'n', 'm', ',', '.', '-', 0xff, '*', /* scan 30-37 */ 96 ' ', ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 97 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', /* scan 40-47 */ 98 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */ 99 '2', '3', '0', ',', 0xff, 0xff, '<', 0xff, /* scan 50-57 */ 100 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */ 101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */ 102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */ 103 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */ 104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */ 105 '\r', 0xff, '/', '*', 106 }; 107 108 static unsigned char kbd_shift_xlate_german[] = { 109 0xff, 0x1b, '!', '"', 0x15, '$', '%', '&', /* scan 00-07 */ 110 '/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 08-0F */ 111 'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* scan 10-17 */ 112 'O', 'P', 0x9a, '*', '\r', 0xff, 'A', 'S', /* scan 18-1F */ 113 'D', 'F', 'G', 'H', 'J', 'K', 'L', 0x99, /* scan 20-27 */ 114 0x8e, 0xf8, 0xff, '\'', 'Y', 'X', 'C', 'V', /* scan 28-2F */ 115 'B', 'N', 'M', ';', ':', '_', 0xff, '*', /* scan 30-37 */ 116 ' ', ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 117 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7', /* scan 40-47 */ 118 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */ 119 '2', '3', '0', ',', 0xff, 0xff, '>', 0xff, /* scan 50-57 */ 120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */ 121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */ 122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */ 123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */ 124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */ 125 '\r', 0xff, '/', '*', 126 }; 127 128 static unsigned char kbd_right_alt_xlate_german[] = { 129 0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */ 130 '{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */ 131 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */ 132 0xff, 0xff, 0xff, '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */ 133 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */ 134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */ 135 0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */ 136 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */ 137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */ 138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */ 139 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '|', 0xff, /* scan 50-57 */ 140 }; 141 142 enum kbd_mask { 143 KBD_ENGLISH = 1 << 0, 144 KBD_GERMAN = 1 << 1, 145 }; 146 147 static struct kbd_entry { 148 int kbd_mask; /* Which languages this is for */ 149 int left_keycode; /* Left keycode to select this map */ 150 int right_keycode; /* Right keycode to select this map */ 151 const uchar *xlate; /* Ascii code for each keycode */ 152 int num_entries; /* Number of entries in xlate */ 153 } kbd_entry[] = { 154 { KBD_ENGLISH, -1, -1, 155 kbd_plain_xlate, ARRAY_SIZE(kbd_plain_xlate) }, 156 { KBD_GERMAN, -1, -1, 157 kbd_plain_xlate_german, ARRAY_SIZE(kbd_plain_xlate_german) }, 158 { KBD_ENGLISH, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 159 kbd_shift_xlate, ARRAY_SIZE(kbd_shift_xlate) }, 160 { KBD_GERMAN, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 161 kbd_shift_xlate_german, ARRAY_SIZE(kbd_shift_xlate_german) }, 162 { KBD_ENGLISH | KBD_GERMAN, KEY_LEFTCTRL, KEY_RIGHTCTRL, 163 kbd_ctrl_xlate, ARRAY_SIZE(kbd_ctrl_xlate) }, 164 { KBD_GERMAN, -1, KEY_RIGHTALT, 165 kbd_right_alt_xlate_german, 166 ARRAY_SIZE(kbd_right_alt_xlate_german) }, 167 {}, 168 }; 169 170 /* 171 * Scan key code to ANSI 3.64 escape sequence table. This table is 172 * incomplete in that it does not include all possible extra keys. 173 */ 174 static struct { 175 int kbd_scan_code; 176 char *escape; 177 } kbd_to_ansi364[] = { 178 { KEY_UP, "\033[A"}, 179 { KEY_DOWN, "\033[B"}, 180 { KEY_RIGHT, "\033[C"}, 181 { KEY_LEFT, "\033[D"}, 182 }; 183 184 /* Maximum number of output characters that an ANSI sequence expands to */ 185 #define ANSI_CHAR_MAX 3 186 187 static int input_queue_ascii(struct input_config *config, int ch) 188 { 189 if (config->fifo_in + 1 == INPUT_BUFFER_LEN) { 190 if (!config->fifo_out) 191 return -1; /* buffer full */ 192 else 193 config->fifo_in = 0; 194 } else { 195 if (config->fifo_in + 1 == config->fifo_out) 196 return -1; /* buffer full */ 197 config->fifo_in++; 198 } 199 debug(" {%02x} ", ch); 200 config->fifo[config->fifo_in] = (uchar)ch; 201 202 return 0; 203 } 204 205 int input_tstc(struct input_config *config) 206 { 207 if (config->fifo_in == config->fifo_out && config->read_keys) { 208 if (!(*config->read_keys)(config)) 209 return 0; 210 } 211 return config->fifo_in != config->fifo_out; 212 } 213 214 int input_getc(struct input_config *config) 215 { 216 int err = 0; 217 218 while (config->fifo_in == config->fifo_out) { 219 if (config->read_keys) 220 err = (*config->read_keys)(config); 221 if (err) 222 return -1; 223 } 224 225 if (++config->fifo_out == INPUT_BUFFER_LEN) 226 config->fifo_out = 0; 227 228 return config->fifo[config->fifo_out]; 229 } 230 231 /** 232 * Process a modifier/special key press or release and decide which key 233 * translation array should be used as a result. 234 * 235 * TODO: Should keep track of modifier press/release 236 * 237 * @param config Input state 238 * @param key Key code to process 239 * @param release 0 if a press, 1 if a release 240 * @return pointer to keycode->ascii translation table that should be used 241 */ 242 static struct input_key_xlate *process_modifier(struct input_config *config, 243 int key, int release) 244 { 245 #ifdef CONFIG_DM_KEYBOARD 246 struct udevice *dev = config->dev; 247 struct keyboard_ops *ops = keyboard_get_ops(dev); 248 #endif 249 struct input_key_xlate *table; 250 int i; 251 252 /* Start with the main table, and see what modifiers change it */ 253 assert(config->num_tables > 0); 254 table = &config->table[0]; 255 for (i = 1; i < config->num_tables; i++) { 256 struct input_key_xlate *tab = &config->table[i]; 257 258 if (key == tab->left_keycode || key == tab->right_keycode) 259 table = tab; 260 } 261 262 /* Handle the lighted keys */ 263 if (!release) { 264 int flip = -1; 265 266 switch (key) { 267 case KEY_SCROLLLOCK: 268 flip = FLAG_SCROLL_LOCK; 269 break; 270 case KEY_NUMLOCK: 271 flip = FLAG_NUM_LOCK; 272 break; 273 case KEY_CAPSLOCK: 274 flip = FLAG_CAPS_LOCK; 275 break; 276 } 277 278 if (flip != -1) { 279 int leds = 0; 280 281 config->flags ^= flip; 282 if (config->flags & FLAG_NUM_LOCK) 283 leds |= INPUT_LED_NUM; 284 if (config->flags & FLAG_CAPS_LOCK) 285 leds |= INPUT_LED_CAPS; 286 if (config->flags & FLAG_SCROLL_LOCK) 287 leds |= INPUT_LED_SCROLL; 288 config->leds = leds; 289 config->leds_changed = flip; 290 291 #ifdef CONFIG_DM_KEYBOARD 292 if (ops->update_leds) { 293 if (ops->update_leds(dev, config->leds)) 294 debug("Update keyboard's LED failed\n"); 295 } 296 #endif 297 } 298 } 299 300 return table; 301 } 302 303 /** 304 * Search an int array for a key value 305 * 306 * @param array Array to search 307 * @param count Number of elements in array 308 * @param key Key value to find 309 * @return element where value was first found, -1 if none 310 */ 311 static int array_search(int *array, int count, int key) 312 { 313 int i; 314 315 for (i = 0; i < count; i++) { 316 if (array[i] == key) 317 return i; 318 } 319 320 return -1; 321 } 322 323 /** 324 * Sort an array so that those elements that exist in the ordering are 325 * first in the array, and in the same order as the ordering. The algorithm 326 * is O(count * ocount) and designed for small arrays. 327 * 328 * TODO: Move this to common / lib? 329 * 330 * @param dest Array with elements to sort, also destination array 331 * @param count Number of elements to sort 332 * @param order Array containing ordering elements 333 * @param ocount Number of ordering elements 334 * @return number of elements in dest that are in order (these will be at the 335 * start of dest). 336 */ 337 static int sort_array_by_ordering(int *dest, int count, int *order, 338 int ocount) 339 { 340 int temp[count]; 341 int dest_count; 342 int same; /* number of elements which are the same */ 343 int i; 344 345 /* setup output items, copy items to be sorted into our temp area */ 346 memcpy(temp, dest, count * sizeof(*dest)); 347 dest_count = 0; 348 349 /* work through the ordering, move over the elements we agree on */ 350 for (i = 0; i < ocount; i++) { 351 if (array_search(temp, count, order[i]) != -1) 352 dest[dest_count++] = order[i]; 353 } 354 same = dest_count; 355 356 /* now move over the elements that are not in the ordering */ 357 for (i = 0; i < count; i++) { 358 if (array_search(order, ocount, temp[i]) == -1) 359 dest[dest_count++] = temp[i]; 360 } 361 assert(dest_count == count); 362 return same; 363 } 364 365 /** 366 * Check a list of key codes against the previous key scan 367 * 368 * Given a list of new key codes, we check how many of these are the same 369 * as last time. 370 * 371 * @param config Input state 372 * @param keycode List of key codes to examine 373 * @param num_keycodes Number of key codes 374 * @param same Returns number of key codes which are the same 375 */ 376 static int input_check_keycodes(struct input_config *config, 377 int keycode[], int num_keycodes, int *same) 378 { 379 /* Select the 'plain' xlate table to start with */ 380 if (!config->num_tables) { 381 debug("%s: No xlate tables: cannot decode keys\n", __func__); 382 return -1; 383 } 384 385 /* sort the keycodes into the same order as the previous ones */ 386 *same = sort_array_by_ordering(keycode, num_keycodes, 387 config->prev_keycodes, config->num_prev_keycodes); 388 389 memcpy(config->prev_keycodes, keycode, num_keycodes * sizeof(int)); 390 config->num_prev_keycodes = num_keycodes; 391 392 return *same != num_keycodes; 393 } 394 395 /** 396 * Checks and converts a special key code into ANSI 3.64 escape sequence. 397 * 398 * @param config Input state 399 * @param keycode Key code to examine 400 * @param output_ch Buffer to place output characters into. It should 401 * be at least ANSI_CHAR_MAX bytes long, to allow for 402 * an ANSI sequence. 403 * @param max_chars Maximum number of characters to add to output_ch 404 * @return number of characters output, if the key was converted, otherwise 0. 405 * This may be larger than max_chars, in which case the overflow 406 * characters are not output. 407 */ 408 static int input_keycode_to_ansi364(struct input_config *config, 409 int keycode, char output_ch[], int max_chars) 410 { 411 const char *escape; 412 int ch_count; 413 int i; 414 415 for (i = ch_count = 0; i < ARRAY_SIZE(kbd_to_ansi364); i++) { 416 if (keycode != kbd_to_ansi364[i].kbd_scan_code) 417 continue; 418 for (escape = kbd_to_ansi364[i].escape; *escape; escape++) { 419 if (ch_count < max_chars) 420 output_ch[ch_count] = *escape; 421 ch_count++; 422 } 423 return ch_count; 424 } 425 426 return 0; 427 } 428 429 /** 430 * Converts and queues a list of key codes in escaped ASCII string form 431 * Convert a list of key codes into ASCII 432 * 433 * You must call input_check_keycodes() before this. It turns the keycode 434 * list into a list of ASCII characters and sends them to the input layer. 435 * 436 * Characters which were seen last time do not generate fresh ASCII output. 437 * The output (calls to queue_ascii) may be longer than num_keycodes, if the 438 * keycode contains special keys that was encoded to longer escaped sequence. 439 * 440 * @param config Input state 441 * @param keycode List of key codes to examine 442 * @param num_keycodes Number of key codes 443 * @param output_ch Buffer to place output characters into. It should 444 * be at last ANSI_CHAR_MAX * num_keycodes, to allow for 445 * ANSI sequences. 446 * @param max_chars Maximum number of characters to add to output_ch 447 * @param same Number of key codes which are the same 448 * @return number of characters written into output_ch, or -1 if we would 449 * exceed max_chars chars. 450 */ 451 static int input_keycodes_to_ascii(struct input_config *config, 452 int keycode[], int num_keycodes, char output_ch[], 453 int max_chars, int same) 454 { 455 struct input_key_xlate *table; 456 int ch_count = 0; 457 int i; 458 459 table = &config->table[0]; 460 461 /* deal with modifiers first */ 462 for (i = 0; i < num_keycodes; i++) { 463 int key = keycode[i] & KEY_MASK; 464 465 if (key >= table->num_entries || table->xlate[key] == 0xff) { 466 table = process_modifier(config, key, 467 keycode[i] & KEY_RELEASE); 468 } 469 } 470 471 /* Start conversion by looking for the first new keycode (by same). */ 472 for (i = same; i < num_keycodes; i++) { 473 int key = keycode[i]; 474 int ch; 475 476 /* 477 * For a normal key (with an ASCII value), add it; otherwise 478 * translate special key to escape sequence if possible. 479 */ 480 if (key < table->num_entries) { 481 ch = table->xlate[key]; 482 if ((config->flags & FLAG_CAPS_LOCK) && 483 ch >= 'a' && ch <= 'z') 484 ch -= 'a' - 'A'; 485 /* ban digit numbers if 'Num Lock' is not on */ 486 if (!(config->flags & FLAG_NUM_LOCK)) { 487 if (key >= KEY_KP7 && key <= KEY_KPDOT && 488 key != KEY_KPMINUS && key != KEY_KPPLUS) 489 ch = 0xff; 490 } 491 if (ch_count < max_chars && ch != 0xff) 492 output_ch[ch_count++] = (uchar)ch; 493 } else { 494 ch_count += input_keycode_to_ansi364(config, key, 495 output_ch, max_chars); 496 } 497 } 498 499 if (ch_count > max_chars) { 500 debug("%s: Output char buffer overflow size=%d, need=%d\n", 501 __func__, max_chars, ch_count); 502 return -1; 503 } 504 505 /* ok, so return keys */ 506 return ch_count; 507 } 508 509 static int _input_send_keycodes(struct input_config *config, int keycode[], 510 int num_keycodes, bool do_send) 511 { 512 char ch[num_keycodes * ANSI_CHAR_MAX]; 513 int count, i, same = 0; 514 int is_repeat = 0; 515 unsigned delay_ms; 516 517 config->modifiers = 0; 518 if (!input_check_keycodes(config, keycode, num_keycodes, &same)) { 519 /* 520 * Same as last time - is it time for another repeat? 521 * TODO(sjg (at) chromium.org) We drop repeats here and since 522 * the caller may not call in again for a while, our 523 * auto-repeat speed is not quite correct. We should 524 * insert another character if we later realise that we 525 * have missed a repeat slot. 526 */ 527 is_repeat = config->allow_repeats || (config->repeat_rate_ms && 528 (int)get_timer(config->next_repeat_ms) >= 0); 529 if (!is_repeat) 530 return 0; 531 } 532 533 count = input_keycodes_to_ascii(config, keycode, num_keycodes, 534 ch, sizeof(ch), is_repeat ? 0 : same); 535 if (do_send) { 536 for (i = 0; i < count; i++) 537 input_queue_ascii(config, ch[i]); 538 } 539 delay_ms = is_repeat ? 540 config->repeat_rate_ms : 541 config->repeat_delay_ms; 542 543 config->next_repeat_ms = get_timer(0) + delay_ms; 544 545 return count; 546 } 547 548 int input_send_keycodes(struct input_config *config, int keycode[], 549 int num_keycodes) 550 { 551 return _input_send_keycodes(config, keycode, num_keycodes, true); 552 } 553 554 int input_add_keycode(struct input_config *config, int new_keycode, 555 bool release) 556 { 557 int keycode[INPUT_MAX_MODIFIERS + 1]; 558 int count, i; 559 560 /* Add the old keycodes which are not removed by this new one */ 561 for (i = 0, count = 0; i < config->num_prev_keycodes; i++) { 562 int code = config->prev_keycodes[i]; 563 564 if (new_keycode == code) { 565 if (release) 566 continue; 567 new_keycode = -1; 568 } 569 keycode[count++] = code; 570 } 571 572 if (!release && new_keycode != -1) 573 keycode[count++] = new_keycode; 574 debug("\ncodes for %02x/%d: ", new_keycode, release); 575 for (i = 0; i < count; i++) 576 debug("%02x ", keycode[i]); 577 debug("\n"); 578 579 /* Don't output any ASCII characters if this is a key release */ 580 return _input_send_keycodes(config, keycode, count, !release); 581 } 582 583 int input_add_table(struct input_config *config, int left_keycode, 584 int right_keycode, const uchar *xlate, int num_entries) 585 { 586 struct input_key_xlate *table; 587 588 if (config->num_tables == INPUT_MAX_MODIFIERS) { 589 debug("%s: Too many modifier tables\n", __func__); 590 return -1; 591 } 592 593 table = &config->table[config->num_tables++]; 594 table->left_keycode = left_keycode; 595 table->right_keycode = right_keycode; 596 table->xlate = xlate; 597 table->num_entries = num_entries; 598 599 return 0; 600 } 601 602 void input_set_delays(struct input_config *config, int repeat_delay_ms, 603 int repeat_rate_ms) 604 { 605 config->repeat_delay_ms = repeat_delay_ms; 606 config->repeat_rate_ms = repeat_rate_ms; 607 } 608 609 void input_allow_repeats(struct input_config *config, bool allow_repeats) 610 { 611 config->allow_repeats = allow_repeats; 612 } 613 614 int input_leds_changed(struct input_config *config) 615 { 616 if (config->leds_changed) 617 return config->leds; 618 619 return -1; 620 } 621 622 int input_add_tables(struct input_config *config, bool german) 623 { 624 struct kbd_entry *entry; 625 int mask; 626 int ret; 627 628 mask = german ? KBD_GERMAN : KBD_ENGLISH; 629 for (entry = kbd_entry; entry->kbd_mask; entry++) { 630 if (!(mask & entry->kbd_mask)) 631 continue; 632 ret = input_add_table(config, entry->left_keycode, 633 entry->right_keycode, entry->xlate, 634 entry->num_entries); 635 if (ret) 636 return ret; 637 } 638 639 return 0; 640 } 641 642 int input_init(struct input_config *config, int leds) 643 { 644 memset(config, '\0', sizeof(*config)); 645 config->leds = leds; 646 647 return 0; 648 } 649 650 int input_stdio_register(struct stdio_dev *dev) 651 { 652 int error; 653 654 error = stdio_register(dev); 655 656 /* check if this is the standard input device */ 657 if (!error && strcmp(env_get("stdin"), dev->name) == 0) { 658 /* reassign the console */ 659 if (OVERWRITE_CONSOLE || 660 console_assign(stdin, dev->name)) 661 return -1; 662 } 663 664 return 0; 665 } 666
