LXR uboot/drivers/input/input.c

   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
  21enum {
  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 */
  38static 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
  54static 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
  70static 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
  86static 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
 106static 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
 126static 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
 140enum kbd_mask {
 141        KBD_ENGLISH     = 1 << 0,
 142        KBD_GERMAN      = 1 << 1,
 143};
 144
 145static 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 */
 172static 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
 185static 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
 203int 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
 212int 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 */
 240static 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 */
 309static 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 */
 335static 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 */
 374static 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 */
 406static 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 */
 449static 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
 507static 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
 546int 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
 552int 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
 581int 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
 600void 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
 607void input_allow_repeats(struct input_config *config, bool allow_repeats)
 608{
 609        config->allow_repeats = allow_repeats;
 610}
 611
 612int input_leds_changed(struct input_config *config)
 613{
 614        if (config->leds_changed)
 615                return config->leds;
 616
 617        return -1;
 618}
 619
 620int 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
 640int 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
 648int 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(getenv("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