input.c 20.3 KB
Newer Older
1
// SPDX-License-Identifier: GPL-2.0+
2
3
4
5
6
7
8
9
/*
 * Translate key codes into ASCII
 *
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2004 DENX Software Engineering, Wolfgang Denk, wd@denx.de
 */

#include <common.h>
10
#include <console.h>
11
#include <dm.h>
Simon Glass's avatar
Simon Glass committed
12
#include <env.h>
13
#include <errno.h>
14
#include <log.h>
15
16
#include <stdio_dev.h>
#include <input.h>
17
18
19
#ifdef CONFIG_DM_KEYBOARD
#include <keyboard.h>
#endif
20
21
22
23
#include <linux/input.h>

enum {
	/* These correspond to the lights on the keyboard */
24
25
26
	FLAG_SCROLL_LOCK	= 1 << 0,
	FLAG_NUM_LOCK		= 1 << 1,
	FLAG_CAPS_LOCK		= 1 << 2,
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51

	/* Special flag ORed with key code to indicate release */
	KEY_RELEASE		= 1 << 15,
	KEY_MASK		= 0xfff,
};

/*
 * These takes map key codes to ASCII. 0xff means no key, or special key.
 * Three tables are provided - one for plain keys, one for when the shift
 * 'modifier' key is pressed and one for when the ctrl modifier key is
 * pressed.
 */
static const uchar kbd_plain_xlate[] = {
	0xff, 0x1b, '1',  '2',  '3',  '4',  '5',  '6',
	'7',  '8',  '9',  '0',  '-',  '=', '\b', '\t',	/* 0x00 - 0x0f */
	'q',  'w',  'e',  'r',  't',  'y',  'u',  'i',
	'o',  'p',  '[',  ']', '\r', 0xff,  'a',  's',  /* 0x10 - 0x1f */
	'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';',
	'\'',  '`', 0xff, '\\', 'z',  'x',  'c',  'v',	/* 0x20 - 0x2f */
	'b',  'n',  'm',  ',' ,  '.', '/', 0xff, 0xff, 0xff,
	' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x30 - 0x3f */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '7',
	'8',  '9',  '-',  '4',  '5',  '6',  '+',  '1',	/* 0x40 - 0x4f */
	'2',  '3',  '0',  '.', 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x50 - 0x5F */
52
	'\r', 0xff, '/',  '*',
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
};

static unsigned char kbd_shift_xlate[] = {
	0xff, 0x1b, '!', '@', '#', '$', '%', '^',
	'&', '*', '(', ')', '_', '+', '\b', '\t',	/* 0x00 - 0x0f */
	'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
	'O', 'P', '{', '}', '\r', 0xff, 'A', 'S',	/* 0x10 - 0x1f */
	'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
	'"', '~', 0xff, '|', 'Z', 'X', 'C', 'V',	/* 0x20 - 0x2f */
	'B', 'N', 'M', '<', '>', '?', 0xff, 0xff, 0xff,
	' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x30 - 0x3f */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7',
	'8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
	'2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x50 - 0x5F */
68
	'\r', 0xff, '/',  '*',
69
70
71
72
73
};

static unsigned char kbd_ctrl_xlate[] = {
	0xff, 0x1b, '1', 0x00, '3', '4', '5', 0x1E,
	'7', '8', '9', '0', 0x1F, '=', '\b', '\t',	/* 0x00 - 0x0f */
74
	0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09,
75
76
77
78
79
80
81
82
83
	0x0f, 0x10, 0x1b, 0x1d, '\n', 0xff, 0x01, 0x13,	/* 0x10 - 0x1f */
	0x04, 0x06, 0x08, 0x09, 0x0a, 0x0b, 0x0c, ';',
	'\'', '~', 0x00, 0x1c, 0x1a, 0x18, 0x03, 0x16,	/* 0x20 - 0x2f */
	0x02, 0x0e, 0x0d, '<', '>', '?', 0xff, 0xff,
	0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x30 - 0x3f */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '7',
	'8', '9', '-', '4', '5', '6', '+', '1',		/* 0x40 - 0x4f */
	'2', '3', '0', '.', 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 0x50 - 0x5F */
84
	'\r', 0xff, '/',  '*',
85
86
};

87
88
89
/*
 * German keymap. Special letters are mapped according to code page 437.
 */
Simon Glass's avatar
Simon Glass committed
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
static const uchar kbd_plain_xlate_german[] = {
	0xff, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan 00-07 */
	 '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
	 'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
	 'o',  'p', 0x81,  '+', '\r', 0xff,  'a',  's', /* scan 18-1F */
	 'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
	0x84,  '^', 0xff,  '#',  'y',  'x',  'c',  'v', /* scan 28-2F */
	 'b',  'n',  'm',  ',',  '.',  '-', 0xff,  '*', /* scan 30-37 */
	 ' ',  ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '7', /* scan 40-47 */
	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
	 '2',  '3',  '0',  ',', 0xff, 0xff,  '<', 0xff, /* scan 50-57 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
	'\r', 0xff,  '/',  '*',
};

static unsigned char kbd_shift_xlate_german[] = {
	   0xff, 0x1b,  '!',  '"', 0x15,  '$',  '%',  '&', /* scan 00-07 */
	 '/',  '(',  ')',  '=',  '?',  '`', 0x08, '\t', /* scan 08-0F */
	 'Q',  'W',  'E',  'R',  'T',  'Z',  'U',  'I', /* scan 10-17 */
	 'O',  'P', 0x9a,  '*', '\r', 0xff,  'A',  'S', /* scan 18-1F */
	 'D',  'F',  'G',  'H',  'J',  'K',  'L', 0x99, /* scan 20-27 */
	0x8e, 0xf8, 0xff, '\'',  'Y',  'X',  'C',  'V', /* scan 28-2F */
	 'B',  'N',  'M',  ';',  ':',  '_', 0xff,  '*', /* scan 30-37 */
	 ' ',  ' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '7', /* scan 40-47 */
	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
	 '2',  '3',  '0',  ',', 0xff, 0xff,  '>', 0xff, /* scan 50-57 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
	'\r', 0xff,  '/',  '*',
};

static unsigned char kbd_right_alt_xlate_german[] = {
131
	0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
Simon Glass's avatar
Simon Glass committed
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
	 '{',  '[',  ']',  '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */
	 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
	0xff, 0xff, 0xff,  '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
	0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '|', 0xff, /* scan 50-57 */
};

enum kbd_mask {
	KBD_ENGLISH	= 1 << 0,
	KBD_GERMAN	= 1 << 1,
};

static struct kbd_entry {
	int kbd_mask;		/* Which languages this is for */
	int left_keycode;	/* Left keycode to select this map */
	int right_keycode;	/* Right keycode to select this map */
	const uchar *xlate;	/* Ascii code for each keycode */
	int num_entries;	/* Number of entries in xlate */
} kbd_entry[] = {
	{ KBD_ENGLISH, -1, -1,
		kbd_plain_xlate, ARRAY_SIZE(kbd_plain_xlate) },
	{ KBD_GERMAN, -1, -1,
		kbd_plain_xlate_german, ARRAY_SIZE(kbd_plain_xlate_german) },
	{ KBD_ENGLISH, KEY_LEFTSHIFT, KEY_RIGHTSHIFT,
		kbd_shift_xlate, ARRAY_SIZE(kbd_shift_xlate) },
	{ KBD_GERMAN, KEY_LEFTSHIFT, KEY_RIGHTSHIFT,
		kbd_shift_xlate_german, ARRAY_SIZE(kbd_shift_xlate_german) },
	{ KBD_ENGLISH | KBD_GERMAN, KEY_LEFTCTRL, KEY_RIGHTCTRL,
		kbd_ctrl_xlate, ARRAY_SIZE(kbd_ctrl_xlate) },
	{ KBD_GERMAN, -1, KEY_RIGHTALT,
		kbd_right_alt_xlate_german,
		ARRAY_SIZE(kbd_right_alt_xlate_german) },
	{},
};

172
/*
173
174
175
176
177
178
 * The table contains conversions from scan key codes to ECMA-48 escape
 * sequences. The same sequences exist in the withdrawn ANSI 3.64 standard.
 *
 * As all escape sequences start with 0x1b this byte has been removed.
 *
 * This table is incomplete in that it does not include all possible extra keys.
179
180
181
182
183
 */
static struct {
	int kbd_scan_code;
	char *escape;
} kbd_to_ansi364[] = {
184
185
186
187
188
189
190
191
192
193
194
195
196
197
	{ KEY_UP, "[A"},
	{ KEY_LEFT, "[D"},
	{ KEY_RIGHT, "[C"},
	{ KEY_DOWN, "[B"},
	{ KEY_F1, "OP"},
	{ KEY_F2, "OQ"},
	{ KEY_F3, "OR"},
	{ KEY_F4, "OS"},
	{ KEY_F5, "[15~"},
	{ KEY_F6, "[17~"},
	{ KEY_F7, "[18~"},
	{ KEY_F8, "[19~"},
	{ KEY_F9, "[20~"},
	{ KEY_F10, "[21~"},
198
199
200
};

/* Maximum number of output characters that an ANSI sequence expands to */
201
#define ANSI_CHAR_MAX	5
202

203
static int input_queue_ascii(struct input_config *config, int ch)
204
205
206
207
208
209
210
211
212
213
214
{
	if (config->fifo_in + 1 == INPUT_BUFFER_LEN) {
		if (!config->fifo_out)
			return -1; /* buffer full */
		else
			config->fifo_in = 0;
	} else {
		if (config->fifo_in + 1 == config->fifo_out)
			return -1; /* buffer full */
		config->fifo_in++;
	}
215
	debug(" {%02x} ", ch);
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
	config->fifo[config->fifo_in] = (uchar)ch;

	return 0;
}

int input_tstc(struct input_config *config)
{
	if (config->fifo_in == config->fifo_out && config->read_keys) {
		if (!(*config->read_keys)(config))
			return 0;
	}
	return config->fifo_in != config->fifo_out;
}

int input_getc(struct input_config *config)
{
	int err = 0;

	while (config->fifo_in == config->fifo_out) {
		if (config->read_keys)
			err = (*config->read_keys)(config);
		if (err)
			return -1;
	}

	if (++config->fifo_out == INPUT_BUFFER_LEN)
		config->fifo_out = 0;

	return config->fifo[config->fifo_out];
}

/**
 * Process a modifier/special key press or release and decide which key
 * translation array should be used as a result.
 *
 * TODO: Should keep track of modifier press/release
 *
 * @param config	Input state
 * @param key		Key code to process
 * @param release	0 if a press, 1 if a release
256
 * Return: pointer to keycode->ascii translation table that should be used
257
258
259
260
 */
static struct input_key_xlate *process_modifier(struct input_config *config,
						int key, int release)
{
261
262
263
264
#ifdef CONFIG_DM_KEYBOARD
	struct udevice *dev = config->dev;
	struct keyboard_ops *ops = keyboard_get_ops(dev);
#endif
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
	struct input_key_xlate *table;
	int i;

	/* Start with the main table, and see what modifiers change it */
	assert(config->num_tables > 0);
	table = &config->table[0];
	for (i = 1; i < config->num_tables; i++) {
		struct input_key_xlate *tab = &config->table[i];

		if (key == tab->left_keycode || key == tab->right_keycode)
			table = tab;
	}

	/* Handle the lighted keys */
	if (!release) {
280
281
		int flip = -1;

282
283
284
285
286
287
288
289
290
291
292
293
		switch (key) {
		case KEY_SCROLLLOCK:
			flip = FLAG_SCROLL_LOCK;
			break;
		case KEY_NUMLOCK:
			flip = FLAG_NUM_LOCK;
			break;
		case KEY_CAPSLOCK:
			flip = FLAG_CAPS_LOCK;
			break;
		}

294
295
296
		if (flip != -1) {
			int leds = 0;

297
			config->flags ^= flip;
298
299
300
301
302
303
304
			if (config->flags & FLAG_NUM_LOCK)
				leds |= INPUT_LED_NUM;
			if (config->flags & FLAG_CAPS_LOCK)
				leds |= INPUT_LED_CAPS;
			if (config->flags & FLAG_SCROLL_LOCK)
				leds |= INPUT_LED_SCROLL;
			config->leds = leds;
305
			config->leds_changed = flip;
306
307
308
309
310
311
312

#ifdef CONFIG_DM_KEYBOARD
			if (ops->update_leds) {
				if (ops->update_leds(dev, config->leds))
					debug("Update keyboard's LED failed\n");
			}
#endif
313
		}
314
315
316
317
318
319
320
321
322
323
324
	}

	return table;
}

/**
 * Search an int array for a key value
 *
 * @param array	Array to search
 * @param count	Number of elements in array
 * @param key	Key value to find
325
 * Return: element where value was first found, -1 if none
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
 */
static int array_search(int *array, int count, int key)
{
	int i;

	for (i = 0; i < count; i++) {
		if (array[i] == key)
			return i;
	}

	return -1;
}

/**
 * Sort an array so that those elements that exist in the ordering are
 * first in the array, and in the same order as the ordering. The algorithm
 * is O(count * ocount) and designed for small arrays.
 *
 * TODO: Move this to common / lib?
 *
 * @param dest		Array with elements to sort, also destination array
 * @param count		Number of elements to sort
 * @param order		Array containing ordering elements
 * @param ocount	Number of ordering elements
350
 * Return: number of elements in dest that are in order (these will be at the
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
 *	start of dest).
 */
static int sort_array_by_ordering(int *dest, int count, int *order,
				   int ocount)
{
	int temp[count];
	int dest_count;
	int same;	/* number of elements which are the same */
	int i;

	/* setup output items, copy items to be sorted into our temp area */
	memcpy(temp, dest, count * sizeof(*dest));
	dest_count = 0;

	/* work through the ordering, move over the elements we agree on */
	for (i = 0; i < ocount; i++) {
		if (array_search(temp, count, order[i]) != -1)
			dest[dest_count++] = order[i];
	}
	same = dest_count;

	/* now move over the elements that are not in the ordering */
	for (i = 0; i < count; i++) {
		if (array_search(order, ocount, temp[i]) == -1)
			dest[dest_count++] = temp[i];
	}
	assert(dest_count == count);
	return same;
}

/**
 * Check a list of key codes against the previous key scan
 *
 * Given a list of new key codes, we check how many of these are the same
 * as last time.
 *
 * @param config	Input state
 * @param keycode	List of key codes to examine
 * @param num_keycodes	Number of key codes
 * @param same		Returns number of key codes which are the same
 */
static int input_check_keycodes(struct input_config *config,
			   int keycode[], int num_keycodes, int *same)
{
	/* Select the 'plain' xlate table to start with */
	if (!config->num_tables) {
		debug("%s: No xlate tables: cannot decode keys\n", __func__);
		return -1;
	}

	/* sort the keycodes into the same order as the previous ones */
	*same = sort_array_by_ordering(keycode, num_keycodes,
			config->prev_keycodes, config->num_prev_keycodes);

	memcpy(config->prev_keycodes, keycode, num_keycodes * sizeof(int));
	config->num_prev_keycodes = num_keycodes;

	return *same != num_keycodes;
}

/**
412
413
414
415
416
417
418
419
 * Checks and converts a special key code into ANSI 3.64 escape sequence.
 *
 * @param config	Input state
 * @param keycode	Key code to examine
 * @param output_ch	Buffer to place output characters into. It should
 *			be at least ANSI_CHAR_MAX bytes long, to allow for
 *			an ANSI sequence.
 * @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
422
423
424
425
426
427
428
429
430
431
432
433
 *	This may be larger than max_chars, in which case the overflow
 *	characters are not output.
 */
static int input_keycode_to_ansi364(struct input_config *config,
		int keycode, char output_ch[], int max_chars)
{
	const char *escape;
	int ch_count;
	int i;

	for (i = ch_count = 0; i < ARRAY_SIZE(kbd_to_ansi364); i++) {
		if (keycode != kbd_to_ansi364[i].kbd_scan_code)
			continue;
434
		output_ch[ch_count++] = 0x1b;
435
436
437
438
439
440
441
442
443
444
445
446
447
		for (escape = kbd_to_ansi364[i].escape; *escape; escape++) {
			if (ch_count < max_chars)
				output_ch[ch_count] = *escape;
			ch_count++;
		}
		return ch_count;
	}

	return 0;
}

/**
 * Converts and queues a list of key codes in escaped ASCII string form
448
449
450
 * Convert a list of key codes into ASCII
 *
 * 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
455
 * The output (calls to queue_ascii) may be longer than num_keycodes, if the
 * keycode contains special keys that was encoded to longer escaped sequence.
456
457
458
459
 *
 * @param config	Input state
 * @param keycode	List of key codes to examine
 * @param num_keycodes	Number of key codes
460
461
462
463
 * @param output_ch	Buffer to place output characters into. It should
 *			be at last ANSI_CHAR_MAX * num_keycodes, to allow for
 *			ANSI sequences.
 * @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
468
 */
static int input_keycodes_to_ascii(struct input_config *config,
469
470
		int keycode[], int num_keycodes, char output_ch[],
		int max_chars, int same)
471
472
{
	struct input_key_xlate *table;
473
	int ch_count = 0;
474
475
476
477
478
479
480
481
482
483
484
485
486
487
	int i;

	table = &config->table[0];

	/* deal with modifiers first */
	for (i = 0; i < num_keycodes; i++) {
		int key = keycode[i] & KEY_MASK;

		if (key >= table->num_entries || table->xlate[key] == 0xff) {
			table = process_modifier(config, key,
					keycode[i] & KEY_RELEASE);
		}
	}

488
489
	/* Start conversion by looking for the first new keycode (by same). */
	for (i = same; i < num_keycodes; i++) {
490
		int key = keycode[i];
491
		int ch = 0xff;
492

493
494
495
496
		/*
		 * For a normal key (with an ASCII value), add it; otherwise
		 * translate special key to escape sequence if possible.
		 */
Simon Glass's avatar
Simon Glass committed
497
498
499
500
501
		if (key < table->num_entries) {
			ch = table->xlate[key];
			if ((config->flags & FLAG_CAPS_LOCK) &&
			    ch >= 'a' && ch <= 'z')
				ch -= 'a' - 'A';
502
503
504
505
506
507
			/* ban digit numbers if 'Num Lock' is not on */
			if (!(config->flags & FLAG_NUM_LOCK)) {
				if (key >= KEY_KP7 && key <= KEY_KPDOT &&
				    key != KEY_KPMINUS && key != KEY_KPPLUS)
					ch = 0xff;
			}
Simon Glass's avatar
Simon Glass committed
508
509
			if (ch_count < max_chars && ch != 0xff)
				output_ch[ch_count++] = (uchar)ch;
510
511
		}
		if (ch == 0xff)
512
513
			ch_count += input_keycode_to_ansi364(config, key,
						output_ch, max_chars);
514
515
	}

516
517
518
519
520
521
	if (ch_count > max_chars) {
		debug("%s: Output char buffer overflow size=%d, need=%d\n",
		      __func__, max_chars, ch_count);
		return -1;
	}

522
523
524
525
	/* ok, so return keys */
	return ch_count;
}

526
527
static int _input_send_keycodes(struct input_config *config, int keycode[],
				int num_keycodes, bool do_send)
528
{
529
	char ch[num_keycodes * ANSI_CHAR_MAX];
530
531
532
533
534
535
536
537
538
539
540
541
542
543
	int count, i, same = 0;
	int is_repeat = 0;
	unsigned delay_ms;

	config->modifiers = 0;
	if (!input_check_keycodes(config, keycode, num_keycodes, &same)) {
		/*
		 * Same as last time - is it time for another repeat?
		 * TODO(sjg@chromium.org) We drop repeats here and since
		 * the caller may not call in again for a while, our
		 * auto-repeat speed is not quite correct. We should
		 * insert another character if we later realise that we
		 * have missed a repeat slot.
		 */
544
545
		is_repeat = config->allow_repeats || (config->repeat_rate_ms &&
			(int)get_timer(config->next_repeat_ms) >= 0);
546
547
548
549
550
		if (!is_repeat)
			return 0;
	}

	count = input_keycodes_to_ascii(config, keycode, num_keycodes,
551
					ch, sizeof(ch), is_repeat ? 0 : same);
552
553
554
555
	if (do_send) {
		for (i = 0; i < count; i++)
			input_queue_ascii(config, ch[i]);
	}
556
557
558
559
560
	delay_ms = is_repeat ?
			config->repeat_rate_ms :
			config->repeat_delay_ms;

	config->next_repeat_ms = get_timer(0) + delay_ms;
561
562

	return count;
563
564
}

565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
int input_send_keycodes(struct input_config *config, int keycode[],
			int num_keycodes)
{
	return _input_send_keycodes(config, keycode, num_keycodes, true);
}

int input_add_keycode(struct input_config *config, int new_keycode,
		      bool release)
{
	int keycode[INPUT_MAX_MODIFIERS + 1];
	int count, i;

	/* Add the old keycodes which are not removed by this new one */
	for (i = 0, count = 0; i < config->num_prev_keycodes; i++) {
		int code = config->prev_keycodes[i];

		if (new_keycode == code) {
			if (release)
				continue;
			new_keycode = -1;
		}
		keycode[count++] = code;
	}

	if (!release && new_keycode != -1)
		keycode[count++] = new_keycode;
	debug("\ncodes for %02x/%d: ", new_keycode, release);
	for (i = 0; i < count; i++)
		debug("%02x ", keycode[i]);
	debug("\n");

	/* Don't output any ASCII characters if this is a key release */
	return _input_send_keycodes(config, keycode, count, !release);
}

600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
int input_add_table(struct input_config *config, int left_keycode,
		    int right_keycode, const uchar *xlate, int num_entries)
{
	struct input_key_xlate *table;

	if (config->num_tables == INPUT_MAX_MODIFIERS) {
		debug("%s: Too many modifier tables\n", __func__);
		return -1;
	}

	table = &config->table[config->num_tables++];
	table->left_keycode = left_keycode;
	table->right_keycode = right_keycode;
	table->xlate = xlate;
	table->num_entries = num_entries;

	return 0;
}

619
void input_set_delays(struct input_config *config, int repeat_delay_ms,
620
621
622
623
	       int repeat_rate_ms)
{
	config->repeat_delay_ms = repeat_delay_ms;
	config->repeat_rate_ms = repeat_rate_ms;
624
625
}

626
627
628
629
630
void input_allow_repeats(struct input_config *config, bool allow_repeats)
{
	config->allow_repeats = allow_repeats;
}

631
632
633
634
635
636
637
638
int input_leds_changed(struct input_config *config)
{
	if (config->leds_changed)
		return config->leds;

	return -1;
}

Simon Glass's avatar
Simon Glass committed
639
int input_add_tables(struct input_config *config, bool german)
640
{
Simon Glass's avatar
Simon Glass committed
641
642
	struct kbd_entry *entry;
	int mask;
643
644
	int ret;

Simon Glass's avatar
Simon Glass committed
645
646
647
648
649
650
651
652
653
654
655
656
	mask = german ? KBD_GERMAN : KBD_ENGLISH;
	for (entry = kbd_entry; entry->kbd_mask; entry++) {
		if (!(mask & entry->kbd_mask))
			continue;
		ret = input_add_table(config, entry->left_keycode,
				      entry->right_keycode, entry->xlate,
				      entry->num_entries);
		if (ret)
			return ret;
	}

	return 0;
657
658
}

659
660
661
662
int input_init(struct input_config *config, int leds)
{
	memset(config, '\0', sizeof(*config));
	config->leds = leds;
663
664
665
666
667
668
669
670
671

	return 0;
}

int input_stdio_register(struct stdio_dev *dev)
{
	int error;

	error = stdio_register(dev);
672
#if !defined(CONFIG_SPL_BUILD) || CONFIG_IS_ENABLED(ENV_SUPPORT)
673
	/* check if this is the standard input device */
674
	if (!error && strcmp(env_get("stdin"), dev->name) == 0) {
675
676
677
678
679
		/* reassign the console */
		if (OVERWRITE_CONSOLE ||
				console_assign(stdin, dev->name))
			return -1;
	}
680
681
682
#else
	error = error;
#endif
683
684
685

	return 0;
}