LXR uboot/drivers/input/input.c

   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@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
  20enum {
  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 */
  37static 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
  53static 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
  69static 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 */
  88static 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
 108static 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
 128static 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
 142enum kbd_mask {
 143        KBD_ENGLISH     = 1 << 0,
 144        KBD_GERMAN      = 1 << 1,
 145};
 146
 147static 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 */
 174static 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
 187static 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
 205int 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
 214int 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 */
 242static 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 */
 311static 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 */
 337static 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 */
 376static 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 */
 408static 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 */
 451static 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
 509static 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@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
 548int 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
 554int 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
 583int 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
 602void 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
 609void input_allow_repeats(struct input_config *config, bool allow_repeats)
 610{
 611        config->allow_repeats = allow_repeats;
 612}
 613
 614int input_leds_changed(struct input_config *config)
 615{
 616        if (config->leds_changed)
 617                return config->leds;
 618
 619        return -1;
 620}
 621
 622int 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
 642int 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
 650int input_stdio_register(struct stdio_dev *dev)
 651{
 652        int error;
 653
 654        error = stdio_register(dev);
 655#if !defined(CONFIG_SPL_BUILD) || CONFIG_IS_ENABLED(ENV_SUPPORT)
 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#else
 664        error = error;
 665#endif
 666
 667        return 0;
 668}
 669