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 <env.h>
13#include <errno.h>
14#include <log.h>
15#include <stdio_dev.h>
16#include <input.h>
17#ifdef CONFIG_DM_KEYBOARD
18#include <keyboard.h>
19#endif
20#include <linux/input.h>
21
22enum {
23	/* These correspond to the lights on the keyboard */
24	FLAG_SCROLL_LOCK	= 1 << 0,
25	FLAG_NUM_LOCK		= 1 << 1,
26	FLAG_CAPS_LOCK		= 1 << 2,
27
28	/* Special flag ORed with key code to indicate release */
29	KEY_RELEASE		= 1 << 15,
30	KEY_MASK		= 0xfff,
31};
32
33/*
34 * These takes map key codes to ASCII. 0xff means no key, or special key.
35 * Three tables are provided - one for plain keys, one for when the shift
36 * 'modifier' key is pressed and one for when the ctrl modifier key is
37 * pressed.
38 */
39static const uchar kbd_plain_xlate[] = {
40	0xff, 0x1b, '1',  '2',  '3',  '4',  '5',  '6',
41	'7',  '8',  '9',  '0',  '-',  '=', '\b', '\t',	/* 0x00 - 0x0f */
42	'q',  'w',  'e',  'r',  't',  'y',  'u',  'i',
43	'o',  'p',  '[',  ']', '\r', 0xff,  'a',  's',  /* 0x10 - 0x1f */
44	'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';',
45	'\'',  '`', 0xff, '\\', 'z',  'x',  'c',  'v',	/* 0x20 - 0x2f */
46	'b',  'n',  'm',  ',' ,  '.', '/', 0xff, 0xff, 0xff,
47	' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x30 - 0x3f */
48	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '7',
49	'8',  '9',  '-',  '4',  '5',  '6',  '+',  '1',	/* 0x40 - 0x4f */
50	'2',  '3',  '0',  '.', 0xff, 0xff, 0xff, 0xff,
51	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x50 - 0x5F */
52	'\r', 0xff, '/',  '*',
53};
54
55static unsigned char kbd_shift_xlate[] = {
56	0xff, 0x1b, '!', '@', '#', '$', '%', '^',
57	'&', '*', '(', ')', '_', '+', '\b', '\t',	/* 0x00 - 0x0f */
58	'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
59	'O', 'P', '{', '}', '\r', 0xff, 'A', 'S',	/* 0x10 - 0x1f */
60	'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
61	'"', '~', 0xff, '|', 'Z', 'X', 'C', 'V',	/* 0x20 - 0x2f */
62	'B', 'N', 'M', '<', '>', '?', 0xff, 0xff, 0xff,
63	' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x30 - 0x3f */
64	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7',
65	'8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
66	'2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff, 0xff,
67	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x50 - 0x5F */
68	'\r', 0xff, '/',  '*',
69};
70
71static unsigned char kbd_ctrl_xlate[] = {
72	0xff, 0x1b, '1', 0x00, '3', '4', '5', 0x1E,
73	'7', '8', '9', '0', 0x1F, '=', '\b', '\t',	/* 0x00 - 0x0f */
74	0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09,
75	0x0f, 0x10, 0x1b, 0x1d, '\n', 0xff, 0x01, 0x13,	/* 0x10 - 0x1f */
76	0x04, 0x06, 0x08, 0x09, 0x0a, 0x0b, 0x0c, ';',
77	'\'', '~', 0x00, 0x1c, 0x1a, 0x18, 0x03, 0x16,	/* 0x20 - 0x2f */
78	0x02, 0x0e, 0x0d, '<', '>', '?', 0xff, 0xff,
79	0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x30 - 0x3f */
80	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7',
81	'8', '9', '-', '4', '5', '6', '+', '1',		/* 0x40 - 0x4f */
82	'2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff,
83	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x50 - 0x5F */
84	'\r', 0xff, '/',  '*',
85};
86
87/*
88 * German keymap. Special letters are mapped according to code page 437.
89 */
90static const uchar kbd_plain_xlate_german[] = {
91	0xff, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan 00-07 */
92	 '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
93	 'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
94	 'o',  'p', 0x81,  '+', '\r', 0xff,  'a',  's', /* scan 18-1F */
95	 'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
96	0x84,  '^', 0xff,  '#',  'y',  'x',  'c',  'v', /* scan 28-2F */
97	 'b',  'n',  'm',  ',',  '.',  '-', 0xff,  '*', /* scan 30-37 */
98	 ' ',  ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
99	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '7', /* scan 40-47 */
100	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
101	 '2',  '3',  '0',  ',', 0xff, 0xff,  '<', 0xff, /* scan 50-57 */
102	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
103	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
104	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
105	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
106	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
107	'\r', 0xff,  '/',  '*',
108};
109
110static unsigned char kbd_shift_xlate_german[] = {
111	   0xff, 0x1b,  '!',  '"', 0x15,  '$',  '%',  '&', /* scan 00-07 */
112	 '/',  '(',  ')',  '=',  '?',  '`', 0x08, '\t', /* scan 08-0F */
113	 'Q',  'W',  'E',  'R',  'T',  'Z',  'U',  'I', /* scan 10-17 */
114	 'O',  'P', 0x9a,  '*', '\r', 0xff,  'A',  'S', /* scan 18-1F */
115	 'D',  'F',  'G',  'H',  'J',  'K',  'L', 0x99, /* scan 20-27 */
116	0x8e, 0xf8, 0xff, '\'',  'Y',  'X',  'C',  'V', /* scan 28-2F */
117	 'B',  'N',  'M',  ';',  ':',  '_', 0xff,  '*', /* scan 30-37 */
118	 ' ',  ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
119	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '7', /* scan 40-47 */
120	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
121	 '2',  '3',  '0',  ',', 0xff, 0xff,  '>', 0xff, /* scan 50-57 */
122	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
123	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
124	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
125	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
126	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
127	'\r', 0xff,  '/',  '*',
128};
129
130static unsigned char kbd_right_alt_xlate_german[] = {
131	0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
132	 '{',  '[',  ']',  '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */
133	 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
134	0xff, 0xff, 0xff,  '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
135	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
136	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
137	0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
138	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
139	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
140	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
141	0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '|', 0xff, /* scan 50-57 */
142};
143
144enum kbd_mask {
145	KBD_ENGLISH	= 1 << 0,
146	KBD_GERMAN	= 1 << 1,
147};
148
149static struct kbd_entry {
150	int kbd_mask;		/* Which languages this is for */
151	int left_keycode;	/* Left keycode to select this map */
152	int right_keycode;	/* Right keycode to select this map */
153	const uchar *xlate;	/* Ascii code for each keycode */
154	int num_entries;	/* Number of entries in xlate */
155} kbd_entry[] = {
156	{ KBD_ENGLISH, -1, -1,
157		kbd_plain_xlate, ARRAY_SIZE(kbd_plain_xlate) },
158	{ KBD_GERMAN, -1, -1,
159		kbd_plain_xlate_german, ARRAY_SIZE(kbd_plain_xlate_german) },
160	{ KBD_ENGLISH, KEY_LEFTSHIFT, KEY_RIGHTSHIFT,
161		kbd_shift_xlate, ARRAY_SIZE(kbd_shift_xlate) },
162	{ KBD_GERMAN, KEY_LEFTSHIFT, KEY_RIGHTSHIFT,
163		kbd_shift_xlate_german, ARRAY_SIZE(kbd_shift_xlate_german) },
164	{ KBD_ENGLISH | KBD_GERMAN, KEY_LEFTCTRL, KEY_RIGHTCTRL,
165		kbd_ctrl_xlate, ARRAY_SIZE(kbd_ctrl_xlate) },
166	{ KBD_GERMAN, -1, KEY_RIGHTALT,
167		kbd_right_alt_xlate_german,
168		ARRAY_SIZE(kbd_right_alt_xlate_german) },
169	{},
170};
171
172/*
173 * The table contains conversions from scan key codes to ECMA-48 escape
174 * sequences. The same sequences exist in the withdrawn ANSI 3.64 standard.
175 *
176 * As all escape sequences start with 0x1b this byte has been removed.
177 *
178 * This table is incomplete in that it does not include all possible extra keys.
179 */
180static struct {
181	int kbd_scan_code;
182	char *escape;
183} kbd_to_ansi364[] = {
184	{ KEY_UP, "[A"},
185	{ KEY_LEFT, "[D"},
186	{ KEY_RIGHT, "[C"},
187	{ KEY_DOWN, "[B"},
188	{ KEY_F1, "OP"},
189	{ KEY_F2, "OQ"},
190	{ KEY_F3, "OR"},
191	{ KEY_F4, "OS"},
192	{ KEY_F5, "[15~"},
193	{ KEY_F6, "[17~"},
194	{ KEY_F7, "[18~"},
195	{ KEY_F8, "[19~"},
196	{ KEY_F9, "[20~"},
197	{ KEY_F10, "[21~"},
198};
199
200/* Maximum number of output characters that an ANSI sequence expands to */
201#define ANSI_CHAR_MAX	5
202
203static int input_queue_ascii(struct input_config *config, int ch)
204{
205	if (config->fifo_in + 1 == INPUT_BUFFER_LEN) {
206		if (!config->fifo_out)
207			return -1; /* buffer full */
208		else
209			config->fifo_in = 0;
210	} else {
211		if (config->fifo_in + 1 == config->fifo_out)
212			return -1; /* buffer full */
213		config->fifo_in++;
214	}
215	debug(" {%02x} ", ch);
216	config->fifo[config->fifo_in] = (uchar)ch;
217
218	return 0;
219}
220
221int input_tstc(struct input_config *config)
222{
223	if (config->fifo_in == config->fifo_out && config->read_keys) {
224		if (!(*config->read_keys)(config))
225			return 0;
226	}
227	return config->fifo_in != config->fifo_out;
228}
229
230int input_getc(struct input_config *config)
231{
232	int err = 0;
233
234	while (config->fifo_in == config->fifo_out) {
235		if (config->read_keys)
236			err = (*config->read_keys)(config);
237		if (err)
238			return -1;
239	}
240
241	if (++config->fifo_out == INPUT_BUFFER_LEN)
242		config->fifo_out = 0;
243
244	return config->fifo[config->fifo_out];
245}
246
247/**
248 * Process a modifier/special key press or release and decide which key
249 * translation array should be used as a result.
250 *
251 * TODO: Should keep track of modifier press/release
252 *
253 * @param config	Input state
254 * @param key		Key code to process
255 * @param release	0 if a press, 1 if a release
256 * Return: pointer to keycode->ascii translation table that should be used
257 */
258static struct input_key_xlate *process_modifier(struct input_config *config,
259						int key, int release)
260{
261#ifdef CONFIG_DM_KEYBOARD
262	struct udevice *dev = config->dev;
263	struct keyboard_ops *ops = keyboard_get_ops(dev);
264#endif
265	struct input_key_xlate *table;
266	int i;
267
268	/* Start with the main table, and see what modifiers change it */
269	assert(config->num_tables > 0);
270	table = &config->table[0];
271	for (i = 1; i < config->num_tables; i++) {
272		struct input_key_xlate *tab = &config->table[i];
273
274		if (key == tab->left_keycode || key == tab->right_keycode)
275			table = tab;
276	}
277
278	/* Handle the lighted keys */
279	if (!release) {
280		int flip = -1;
281
282		switch (key) {
283		case KEY_SCROLLLOCK:
284			flip = FLAG_SCROLL_LOCK;
285			break;
286		case KEY_NUMLOCK:
287			flip = FLAG_NUM_LOCK;
288			break;
289		case KEY_CAPSLOCK:
290			flip = FLAG_CAPS_LOCK;
291			break;
292		}
293
294		if (flip != -1) {
295			int leds = 0;
296
297			config->flags ^= flip;
298			if (config->flags & FLAG_NUM_LOCK)
299				leds |= INPUT_LED_NUM;
300			if (config->flags & FLAG_CAPS_LOCK)
301				leds |= INPUT_LED_CAPS;
302			if (config->flags & FLAG_SCROLL_LOCK)
303				leds |= INPUT_LED_SCROLL;
304			config->leds = leds;
305			config->leds_changed = flip;
306
307#ifdef CONFIG_DM_KEYBOARD
308			if (ops->update_leds) {
309				if (ops->update_leds(dev, config->leds))
310					debug("Update keyboard's LED failed\n");
311			}
312#endif
313		}
314	}
315
316	return table;
317}
318
319/**
320 * Search an int array for a key value
321 *
322 * @param array	Array to search
323 * @param count	Number of elements in array
324 * @param key	Key value to find
325 * Return: element where value was first found, -1 if none
326 */
327static int array_search(int *array, int count, int key)
328{
329	int i;
330
331	for (i = 0; i < count; i++) {
332		if (array[i] == key)
333			return i;
334	}
335
336	return -1;
337}
338
339/**
340 * Sort an array so that those elements that exist in the ordering are
341 * first in the array, and in the same order as the ordering. The algorithm
342 * is O(count * ocount) and designed for small arrays.
343 *
344 * TODO: Move this to common / lib?
345 *
346 * @param dest		Array with elements to sort, also destination array
347 * @param count		Number of elements to sort
348 * @param order		Array containing ordering elements
349 * @param ocount	Number of ordering elements
350 * Return: number of elements in dest that are in order (these will be at the
351 *	start of dest).
352 */
353static int sort_array_by_ordering(int *dest, int count, int *order,
354				   int ocount)
355{
356	int temp[count];
357	int dest_count;
358	int same;	/* number of elements which are the same */
359	int i;
360
361	/* setup output items, copy items to be sorted into our temp area */
362	memcpy(temp, dest, count * sizeof(*dest));
363	dest_count = 0;
364
365	/* work through the ordering, move over the elements we agree on */
366	for (i = 0; i < ocount; i++) {
367		if (array_search(temp, count, order[i]) != -1)
368			dest[dest_count++] = order[i];
369	}
370	same = dest_count;
371
372	/* now move over the elements that are not in the ordering */
373	for (i = 0; i < count; i++) {
374		if (array_search(order, ocount, temp[i]) == -1)
375			dest[dest_count++] = temp[i];
376	}
377	assert(dest_count == count);
378	return same;
379}
380
381/**
382 * Check a list of key codes against the previous key scan
383 *
384 * Given a list of new key codes, we check how many of these are the same
385 * as last time.
386 *
387 * @param config	Input state
388 * @param keycode	List of key codes to examine
389 * @param num_keycodes	Number of key codes
390 * @param same		Returns number of key codes which are the same
391 */
392static int input_check_keycodes(struct input_config *config,
393			   int keycode[], int num_keycodes, int *same)
394{
395	/* Select the 'plain' xlate table to start with */
396	if (!config->num_tables) {
397		debug("%s: No xlate tables: cannot decode keys\n", __func__);
398		return -1;
399	}
400
401	/* sort the keycodes into the same order as the previous ones */
402	*same = sort_array_by_ordering(keycode, num_keycodes,
403			config->prev_keycodes, config->num_prev_keycodes);
404
405	memcpy(config->prev_keycodes, keycode, num_keycodes * sizeof(int));
406	config->num_prev_keycodes = num_keycodes;
407
408	return *same != num_keycodes;
409}
410
411/**
412 * Checks and converts a special key code into ANSI 3.64 escape sequence.
413 *
414 * @param config	Input state
415 * @param keycode	Key code to examine
416 * @param output_ch	Buffer to place output characters into. It should
417 *			be at least ANSI_CHAR_MAX bytes long, to allow for
418 *			an ANSI sequence.
419 * @param max_chars	Maximum number of characters to add to output_ch
420 * Return: number of characters output, if the key was converted, otherwise 0.
421 *	This may be larger than max_chars, in which case the overflow
422 *	characters are not output.
423 */
424static int input_keycode_to_ansi364(struct input_config *config,
425		int keycode, char output_ch[], int max_chars)
426{
427	const char *escape;
428	int ch_count;
429	int i;
430
431	for (i = ch_count = 0; i < ARRAY_SIZE(kbd_to_ansi364); i++) {
432		if (keycode != kbd_to_ansi364[i].kbd_scan_code)
433			continue;
434		output_ch[ch_count++] = 0x1b;
435		for (escape = kbd_to_ansi364[i].escape; *escape; escape++) {
436			if (ch_count < max_chars)
437				output_ch[ch_count] = *escape;
438			ch_count++;
439		}
440		return ch_count;
441	}
442
443	return 0;
444}
445
446/**
447 * Converts and queues a list of key codes in escaped ASCII string form
448 * Convert a list of key codes into ASCII
449 *
450 * You must call input_check_keycodes() before this. It turns the keycode
451 * list into a list of ASCII characters and sends them to the input layer.
452 *
453 * Characters which were seen last time do not generate fresh ASCII output.
454 * The output (calls to queue_ascii) may be longer than num_keycodes, if the
455 * keycode contains special keys that was encoded to longer escaped sequence.
456 *
457 * @param config	Input state
458 * @param keycode	List of key codes to examine
459 * @param num_keycodes	Number of key codes
460 * @param output_ch	Buffer to place output characters into. It should
461 *			be at last ANSI_CHAR_MAX * num_keycodes, to allow for
462 *			ANSI sequences.
463 * @param max_chars	Maximum number of characters to add to output_ch
464 * @param same		Number of key codes which are the same
465 * Return: number of characters written into output_ch, or -1 if we would
466 *	exceed max_chars chars.
467 */
468static int input_keycodes_to_ascii(struct input_config *config,
469		int keycode[], int num_keycodes, char output_ch[],
470		int max_chars, int same)
471{
472	struct input_key_xlate *table;
473	int ch_count = 0;
474	int i;
475
476	table = &config->table[0];
477
478	/* deal with modifiers first */
479	for (i = 0; i < num_keycodes; i++) {
480		int key = keycode[i] & KEY_MASK;
481
482		if (key >= table->num_entries || table->xlate[key] == 0xff) {
483			table = process_modifier(config, key,
484					keycode[i] & KEY_RELEASE);
485		}
486	}
487
488	/* Start conversion by looking for the first new keycode (by same). */
489	for (i = same; i < num_keycodes; i++) {
490		int key = keycode[i];
491		int ch = 0xff;
492
493		/*
494		 * For a normal key (with an ASCII value), add it; otherwise
495		 * translate special key to escape sequence if possible.
496		 */
497		if (key < table->num_entries) {
498			ch = table->xlate[key];
499			if ((config->flags & FLAG_CAPS_LOCK) &&
500			    ch >= 'a' && ch <= 'z')
501				ch -= 'a' - 'A';
502			/* ban digit numbers if 'Num Lock' is not on */
503			if (!(config->flags & FLAG_NUM_LOCK)) {
504				if (key >= KEY_KP7 && key <= KEY_KPDOT &&
505				    key != KEY_KPMINUS && key != KEY_KPPLUS)
506					ch = 0xff;
507			}
508			if (ch_count < max_chars && ch != 0xff)
509				output_ch[ch_count++] = (uchar)ch;
510		}
511		if (ch == 0xff)
512			ch_count += input_keycode_to_ansi364(config, key,
513						output_ch, max_chars);
514	}
515
516	if (ch_count > max_chars) {
517		debug("%s: Output char buffer overflow size=%d, need=%d\n",
518		      __func__, max_chars, ch_count);
519		return -1;
520	}
521
522	/* ok, so return keys */
523	return ch_count;
524}
525
526static int _input_send_keycodes(struct input_config *config, int keycode[],
527				int num_keycodes, bool do_send)
528{
529	char ch[num_keycodes * ANSI_CHAR_MAX];
530	int count, i, same = 0;
531	int is_repeat = 0;
532	unsigned delay_ms;
533
534	config->modifiers = 0;
535	if (!input_check_keycodes(config, keycode, num_keycodes, &same)) {
536		/*
537		 * Same as last time - is it time for another repeat?
538		 * TODO(sjg@chromium.org) We drop repeats here and since
539		 * the caller may not call in again for a while, our
540		 * auto-repeat speed is not quite correct. We should
541		 * insert another character if we later realise that we
542		 * have missed a repeat slot.
543		 */
544		is_repeat = config->allow_repeats || (config->repeat_rate_ms &&
545			(int)get_timer(config->next_repeat_ms) >= 0);
546		if (!is_repeat)
547			return 0;
548	}
549
550	count = input_keycodes_to_ascii(config, keycode, num_keycodes,
551					ch, sizeof(ch), is_repeat ? 0 : same);
552	if (do_send) {
553		for (i = 0; i < count; i++)
554			input_queue_ascii(config, ch[i]);
555	}
556	delay_ms = is_repeat ?
557			config->repeat_rate_ms :
558			config->repeat_delay_ms;
559
560	config->next_repeat_ms = get_timer(0) + delay_ms;
561
562	return count;
563}
564
565int input_send_keycodes(struct input_config *config, int keycode[],
566			int num_keycodes)
567{
568	return _input_send_keycodes(config, keycode, num_keycodes, true);
569}
570
571int input_add_keycode(struct input_config *config, int new_keycode,
572		      bool release)
573{
574	int keycode[INPUT_MAX_MODIFIERS + 1];
575	int count, i;
576
577	/* Add the old keycodes which are not removed by this new one */
578	for (i = 0, count = 0; i < config->num_prev_keycodes; i++) {
579		int code = config->prev_keycodes[i];
580
581		if (new_keycode == code) {
582			if (release)
583				continue;
584			new_keycode = -1;
585		}
586		keycode[count++] = code;
587	}
588
589	if (!release && new_keycode != -1)
590		keycode[count++] = new_keycode;
591	debug("\ncodes for %02x/%d: ", new_keycode, release);
592	for (i = 0; i < count; i++)
593		debug("%02x ", keycode[i]);
594	debug("\n");
595
596	/* Don't output any ASCII characters if this is a key release */
597	return _input_send_keycodes(config, keycode, count, !release);
598}
599
600int input_add_table(struct input_config *config, int left_keycode,
601		    int right_keycode, const uchar *xlate, int num_entries)
602{
603	struct input_key_xlate *table;
604
605	if (config->num_tables == INPUT_MAX_MODIFIERS) {
606		debug("%s: Too many modifier tables\n", __func__);
607		return -1;
608	}
609
610	table = &config->table[config->num_tables++];
611	table->left_keycode = left_keycode;
612	table->right_keycode = right_keycode;
613	table->xlate = xlate;
614	table->num_entries = num_entries;
615
616	return 0;
617}
618
619void input_set_delays(struct input_config *config, int repeat_delay_ms,
620	       int repeat_rate_ms)
621{
622	config->repeat_delay_ms = repeat_delay_ms;
623	config->repeat_rate_ms = repeat_rate_ms;
624}
625
626void input_allow_repeats(struct input_config *config, bool allow_repeats)
627{
628	config->allow_repeats = allow_repeats;
629}
630
631int input_leds_changed(struct input_config *config)
632{
633	if (config->leds_changed)
634		return config->leds;
635
636	return -1;
637}
638
639int input_add_tables(struct input_config *config, bool german)
640{
641	struct kbd_entry *entry;
642	int mask;
643	int ret;
644
645	mask = german ? KBD_GERMAN : KBD_ENGLISH;
646	for (entry = kbd_entry; entry->kbd_mask; entry++) {
647		if (!(mask & entry->kbd_mask))
648			continue;
649		ret = input_add_table(config, entry->left_keycode,
650				      entry->right_keycode, entry->xlate,
651				      entry->num_entries);
652		if (ret)
653			return ret;
654	}
655
656	return 0;
657}
658
659int input_init(struct input_config *config, int leds)
660{
661	memset(config, '\0', sizeof(*config));
662	config->leds = leds;
663
664	return 0;
665}
666
667int input_stdio_register(struct stdio_dev *dev)
668{
669	int error;
670
671	error = stdio_register(dev);
672
673	if (!CONFIG_IS_ENABLED(ENV_SUPPORT))
674		return 0;
675
676	if (!error) {
677		const char *cstdin;
678
679		/* check if this is the standard input device */
680		cstdin = env_get("stdin");
681		if (cstdin && !strcmp(cstdin, dev->name)) {
682			/* reassign the console */
683			if (OVERWRITE_CONSOLE ||
684			    console_assign(stdin, dev->name))
685				return -1;
686		}
687	}
688
689	return 0;
690}
691