summaryrefslogtreecommitdiff
path: root/cmd/bootmenu.c
blob: 5879065c2ea45cc7b9731884aad1aa9a95128340 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
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
131
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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
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
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
/*
 * (C) Copyright 2011-2013 Pali Rohár <pali.rohar@gmail.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <command.h>
#include <ansi.h>
#include <menu.h>
#include <watchdog.h>
#include <malloc.h>
#include <linux/string.h>

/* maximum bootmenu entries */
#define MAX_COUNT	99

/* maximal size of bootmenu env
 *  9 = strlen("bootmenu_")
 *  2 = strlen(MAX_COUNT)
 *  1 = NULL term
 */
#define MAX_ENV_SIZE	(9 + 2 + 1)

struct bootmenu_entry {
	unsigned short int num;		/* unique number 0 .. MAX_COUNT */
	char key[3];			/* key identifier of number */
	char *title;			/* title of entry */
	char *command;			/* hush command of entry */
	struct bootmenu_data *menu;	/* this bootmenu */
	struct bootmenu_entry *next;	/* next menu entry (num+1) */
};

struct bootmenu_data {
	int delay;			/* delay for autoboot */
	int active;			/* active menu entry */
	int count;			/* total count of menu entries */
	struct bootmenu_entry *first;	/* first menu entry */
};

enum bootmenu_key {
	KEY_NONE = 0,
	KEY_UP,
	KEY_DOWN,
	KEY_SELECT,
};

static char *bootmenu_getoption(unsigned short int n)
{
	char name[MAX_ENV_SIZE];

	if (n > MAX_COUNT)
		return NULL;

	sprintf(name, "bootmenu_%d", n);
	return getenv(name);
}

static void bootmenu_print_entry(void *data)
{
	struct bootmenu_entry *entry = data;
	int reverse = (entry->menu->active == entry->num);

	/*
	 * Move cursor to line where the entry will be drown (entry->num)
	 * First 3 lines contain bootmenu header + 1 empty line
	 */
	printf(ANSI_CURSOR_POSITION, entry->num + 4, 1);

	puts("     ");

	if (reverse)
		puts(ANSI_COLOR_REVERSE);

	puts(entry->title);

	if (reverse)
		puts(ANSI_COLOR_RESET);
}

static void bootmenu_autoboot_loop(struct bootmenu_data *menu,
				enum bootmenu_key *key, int *esc)
{
	int i, c;

	if (menu->delay > 0) {
		printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
		printf("  Hit any key to stop autoboot: %2d ", menu->delay);
	}

	while (menu->delay > 0) {
		for (i = 0; i < 100; ++i) {
			if (!tstc()) {
				WATCHDOG_RESET();
				mdelay(10);
				continue;
			}

			menu->delay = -1;
			c = getc();

			switch (c) {
			case '\e':
				*esc = 1;
				*key = KEY_NONE;
				break;
			case '\r':
				*key = KEY_SELECT;
				break;
			default:
				*key = KEY_NONE;
				break;
			}

			break;
		}

		if (menu->delay < 0)
			break;

		--menu->delay;
		printf("\b\b\b%2d ", menu->delay);
	}

	printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
	puts(ANSI_CLEAR_LINE);

	if (menu->delay == 0)
		*key = KEY_SELECT;
}

static void bootmenu_loop(struct bootmenu_data *menu,
		enum bootmenu_key *key, int *esc)
{
	int c;

	while (!tstc()) {
		WATCHDOG_RESET();
		mdelay(10);
	}

	c = getc();

	switch (*esc) {
	case 0:
		/* First char of ANSI escape sequence '\e' */
		if (c == '\e') {
			*esc = 1;
			*key = KEY_NONE;
		}
		break;
	case 1:
		/* Second char of ANSI '[' */
		if (c == '[') {
			*esc = 2;
			*key = KEY_NONE;
		} else {
			*esc = 0;
		}
		break;
	case 2:
	case 3:
		/* Third char of ANSI (number '1') - optional */
		if (*esc == 2 && c == '1') {
			*esc = 3;
			*key = KEY_NONE;
			break;
		}

		*esc = 0;

		/* ANSI 'A' - key up was pressed */
		if (c == 'A')
			*key = KEY_UP;
		/* ANSI 'B' - key down was pressed */
		else if (c == 'B')
			*key = KEY_DOWN;
		/* other key was pressed */
		else
			*key = KEY_NONE;

		break;
	}

	/* enter key was pressed */
	if (c == '\r')
		*key = KEY_SELECT;
}

static char *bootmenu_choice_entry(void *data)
{
	struct bootmenu_data *menu = data;
	struct bootmenu_entry *iter;
	enum bootmenu_key key = KEY_NONE;
	int esc = 0;
	int i;

	while (1) {
		if (menu->delay >= 0) {
			/* Autoboot was not stopped */
			bootmenu_autoboot_loop(menu, &key, &esc);
		} else {
			/* Some key was pressed, so autoboot was stopped */
			bootmenu_loop(menu, &key, &esc);
		}

		switch (key) {
		case KEY_UP:
			if (menu->active > 0)
				--menu->active;
			/* no menu key selected, regenerate menu */
			return NULL;
		case KEY_DOWN:
			if (menu->active < menu->count - 1)
				++menu->active;
			/* no menu key selected, regenerate menu */
			return NULL;
		case KEY_SELECT:
			iter = menu->first;
			for (i = 0; i < menu->active; ++i)
				iter = iter->next;
			return iter->key;
		default:
			break;
		}
	}

	/* never happens */
	debug("bootmenu: this should not happen");
	return NULL;
}

static void bootmenu_destroy(struct bootmenu_data *menu)
{
	struct bootmenu_entry *iter = menu->first;
	struct bootmenu_entry *next;

	while (iter) {
		next = iter->next;
		free(iter->title);
		free(iter->command);
		free(iter);
		iter = next;
	}
	free(menu);
}

static struct bootmenu_data *bootmenu_create(int delay)
{
	unsigned short int i = 0;
	const char *option;
	struct bootmenu_data *menu;
	struct bootmenu_entry *iter = NULL;

	int len;
	char *sep;
	struct bootmenu_entry *entry;

	menu = malloc(sizeof(struct bootmenu_data));
	if (!menu)
		return NULL;

	menu->delay = delay;
	menu->active = 0;
	menu->first = NULL;

	while ((option = bootmenu_getoption(i))) {
		sep = strchr(option, '=');
		if (!sep) {
			printf("Invalid bootmenu entry: %s\n", option);
			break;
		}

		entry = malloc(sizeof(struct bootmenu_entry));
		if (!entry)
			goto cleanup;

		len = sep-option;
		entry->title = malloc(len + 1);
		if (!entry->title) {
			free(entry);
			goto cleanup;
		}
		memcpy(entry->title, option, len);
		entry->title[len] = 0;

		len = strlen(sep + 1);
		entry->command = malloc(len + 1);
		if (!entry->command) {
			free(entry->title);
			free(entry);
			goto cleanup;
		}
		memcpy(entry->command, sep + 1, len);
		entry->command[len] = 0;

		sprintf(entry->key, "%d", i);

		entry->num = i;
		entry->menu = menu;
		entry->next = NULL;

		if (!iter)
			menu->first = entry;
		else
			iter->next = entry;

		iter = entry;
		++i;

		if (i == MAX_COUNT - 1)
			break;
	}

	/* Add U-Boot console entry at the end */
	if (i <= MAX_COUNT - 1) {
		entry = malloc(sizeof(struct bootmenu_entry));
		if (!entry)
			goto cleanup;

		entry->title = strdup("U-Boot console");
		if (!entry->title) {
			free(entry);
			goto cleanup;
		}

		entry->command = strdup("");
		if (!entry->command) {
			free(entry->title);
			free(entry);
			goto cleanup;
		}

		sprintf(entry->key, "%d", i);

		entry->num = i;
		entry->menu = menu;
		entry->next = NULL;

		if (!iter)
			menu->first = entry;
		else
			iter->next = entry;

		iter = entry;
		++i;
	}

	menu->count = i;
	return menu;

cleanup:
	bootmenu_destroy(menu);
	return NULL;
}

static void bootmenu_show(int delay)
{
	int init = 0;
	void *choice = NULL;
	char *title = NULL;
	char *command = NULL;
	struct menu *menu;
	struct bootmenu_data *bootmenu;
	struct bootmenu_entry *iter;
	char *option, *sep;

	/* If delay is 0 do not create menu, just run first entry */
	if (delay == 0) {
		option = bootmenu_getoption(0);
		if (!option) {
			puts("bootmenu option 0 was not found\n");
			return;
		}
		sep = strchr(option, '=');
		if (!sep) {
			puts("bootmenu option 0 is invalid\n");
			return;
		}
		run_command(sep+1, 0);
		return;
	}

	bootmenu = bootmenu_create(delay);
	if (!bootmenu)
		return;

	menu = menu_create(NULL, bootmenu->delay, 1, bootmenu_print_entry,
			   bootmenu_choice_entry, bootmenu);
	if (!menu) {
		bootmenu_destroy(bootmenu);
		return;
	}

	for (iter = bootmenu->first; iter; iter = iter->next) {
		if (!menu_item_add(menu, iter->key, iter))
			goto cleanup;
	}

	/* Default menu entry is always first */
	menu_default_set(menu, "0");

	puts(ANSI_CURSOR_HIDE);
	puts(ANSI_CLEAR_CONSOLE);
	printf(ANSI_CURSOR_POSITION, 1, 1);

	init = 1;

	if (menu_get_choice(menu, &choice)) {
		iter = choice;
		title = strdup(iter->title);
		command = strdup(iter->command);
	}

cleanup:
	menu_destroy(menu);
	bootmenu_destroy(bootmenu);

	if (init) {
		puts(ANSI_CURSOR_SHOW);
		puts(ANSI_CLEAR_CONSOLE);
		printf(ANSI_CURSOR_POSITION, 1, 1);
	}

	if (title && command) {
		debug("Starting entry '%s'\n", title);
		free(title);
		run_command(command, 0);
		free(command);
	}

#ifdef CONFIG_POSTBOOTMENU
	run_command(CONFIG_POSTBOOTMENU, 0);
#endif
}

void menu_display_statusline(struct menu *m)
{
	struct bootmenu_entry *entry;
	struct bootmenu_data *menu;

	if (menu_default_choice(m, (void *)&entry) < 0)
		return;

	menu = entry->menu;

	printf(ANSI_CURSOR_POSITION, 1, 1);
	puts(ANSI_CLEAR_LINE);
	printf(ANSI_CURSOR_POSITION, 2, 1);
	puts("  *** U-Boot Boot Menu ***");
	puts(ANSI_CLEAR_LINE_TO_END);
	printf(ANSI_CURSOR_POSITION, 3, 1);
	puts(ANSI_CLEAR_LINE);

	/* First 3 lines are bootmenu header + 2 empty lines between entries */
	printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
	puts(ANSI_CLEAR_LINE);
	printf(ANSI_CURSOR_POSITION, menu->count + 6, 1);
	puts("  Press UP/DOWN to move, ENTER to select");
	puts(ANSI_CLEAR_LINE_TO_END);
	printf(ANSI_CURSOR_POSITION, menu->count + 7, 1);
	puts(ANSI_CLEAR_LINE);
}

#ifdef CONFIG_MENU_SHOW
int menu_show(int bootdelay)
{
	bootmenu_show(bootdelay);
	return -1; /* -1 - abort boot and run monitor code */
}
#endif

int do_bootmenu(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
	char *delay_str = NULL;
	int delay = 10;

#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
	delay = CONFIG_BOOTDELAY;
#endif

	if (argc >= 2)
		delay_str = argv[1];

	if (!delay_str)
		delay_str = getenv("bootmenu_delay");

	if (delay_str)
		delay = (int)simple_strtol(delay_str, NULL, 10);

	bootmenu_show(delay);
	return 0;
}

U_BOOT_CMD(
	bootmenu, 2, 1, do_bootmenu,
	"ANSI terminal bootmenu",
	"[delay]\n"
	"    - show ANSI terminal bootmenu with autoboot delay"
);