cmd/bootmenu.c

   1 /*
   2  * (C) Copyright 2011-2013 Pali Rohár <pali.rohar@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <ansi.h>
  10 #include <menu.h>
  11 #include <watchdog.h>
  12 #include <malloc.h>
  13 #include <linux/string.h>
  14
  15 /* maximum bootmenu entries */
  16 #define MAX_COUNT       99
  17
  18 /* maximal size of bootmenu env
  19  *  9 = strlen("bootmenu_")
  20  *  2 = strlen(MAX_COUNT)
  21  *  1 = NULL term
  22  */
  23 #define MAX_ENV_SIZE    (9 + 2 + 1)
  24
  25 struct bootmenu_entry {
  26         unsigned short int num;         /* unique number 0 .. MAX_COUNT */
  27         char key[3];                    /* key identifier of number */
  28         char *title;                    /* title of entry */
  29         char *command;                  /* hush command of entry */
  30         struct bootmenu_data *menu;     /* this bootmenu */
  31         struct bootmenu_entry *next;    /* next menu entry (num+1) */
  32 };
  33
  34 struct bootmenu_data {
  35         int delay;                      /* delay for autoboot */
  36         int active;                     /* active menu entry */
  37         int count;                      /* total count of menu entries */
  38         struct bootmenu_entry *first;   /* first menu entry */
  39 };
  40
  41 enum bootmenu_key {
  42         KEY_NONE = 0,
  43         KEY_UP,
  44         KEY_DOWN,
  45         KEY_SELECT,
  46 };
  47
  48 static char *bootmenu_getoption(unsigned short int n)
  49 {
  50         char name[MAX_ENV_SIZE];
  51
  52         if (n > MAX_COUNT)
  53                 return NULL;
  54
  55         sprintf(name, "bootmenu_%d", n);
  56         return env_get(name);
  57 }
  58
  59 static void bootmenu_print_entry(void *data)
  60 {
  61         struct bootmenu_entry *entry = data;
  62         int reverse = (entry->menu->active == entry->num);
  63
  64         /*
  65          * Move cursor to line where the entry will be drown (entry->num)
  66          * First 3 lines contain bootmenu header + 1 empty line
  67          */
  68         printf(ANSI_CURSOR_POSITION, entry->num + 4, 1);
  69
  70         puts("     ");
  71
  72         if (reverse)
  73                 puts(ANSI_COLOR_REVERSE);
  74
  75         puts(entry->title);
  76
  77         if (reverse)
  78                 puts(ANSI_COLOR_RESET);
  79 }
  80
  81 static void bootmenu_autoboot_loop(struct bootmenu_data *menu,
  82                                 enum bootmenu_key *key, int *esc)
  83 {
  84         int i, c;
  85
  86         if (menu->delay > 0) {
  87                 printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
  88                 printf("  Hit any key to stop autoboot: %2d ", menu->delay);
  89         }
  90
  91         while (menu->delay > 0) {
  92                 for (i = 0; i < 100; ++i) {
  93                         if (!tstc()) {
  94                                 WATCHDOG_RESET();
  95                                 mdelay(10);
  96                                 continue;
  97                         }
  98
  99                         menu->delay = -1;
 100                         c = getc();
 101
 102                         switch (c) {
 103                         case '\e':
 104                                 *esc = 1;
 105                                 *key = KEY_NONE;
 106                                 break;
 107                         case '\r':
 108                                 *key = KEY_SELECT;
 109                                 break;
 110                         default:
 111                                 *key = KEY_NONE;
 112                                 break;
 113                         }
 114
 115                         break;
 116                 }
 117
 118                 if (menu->delay < 0)
 119                         break;
 120
 121                 --menu->delay;
 122                 printf("\b\b\b%2d ", menu->delay);
 123         }
 124
 125         printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
 126         puts(ANSI_CLEAR_LINE);
 127
 128         if (menu->delay == 0)
 129                 *key = KEY_SELECT;
 130 }
 131
 132 static void bootmenu_loop(struct bootmenu_data *menu,
 133                 enum bootmenu_key *key, int *esc)
 134 {
 135         int c;
 136
 137         while (!tstc()) {
 138                 WATCHDOG_RESET();
 139                 mdelay(10);
 140         }
 141
 142         c = getc();
 143
 144         switch (*esc) {
 145         case 0:
 146                 /* First char of ANSI escape sequence '\e' */
 147                 if (c == '\e') {
 148                         *esc = 1;
 149                         *key = KEY_NONE;
 150                 }
 151                 break;
 152         case 1:
 153                 /* Second char of ANSI '[' */
 154                 if (c == '[') {
 155                         *esc = 2;
 156                         *key = KEY_NONE;
 157                 } else {
 158                         *esc = 0;
 159                 }
 160                 break;
 161         case 2:
 162         case 3:
 163                 /* Third char of ANSI (number '1') - optional */
 164                 if (*esc == 2 && c == '1') {
 165                         *esc = 3;
 166                         *key = KEY_NONE;
 167                         break;
 168                 }
 169
 170                 *esc = 0;
 171
 172                 /* ANSI 'A' - key up was pressed */
 173                 if (c == 'A')
 174                         *key = KEY_UP;
 175                 /* ANSI 'B' - key down was pressed */
 176                 else if (c == 'B')
 177                         *key = KEY_DOWN;
 178                 /* other key was pressed */
 179                 else
 180                         *key = KEY_NONE;
 181
 182                 break;
 183         }
 184
 185         /* enter key was pressed */
 186         if (c == '\r')
 187                 *key = KEY_SELECT;
 188 }
 189
 190 static char *bootmenu_choice_entry(void *data)
 191 {
 192         struct bootmenu_data *menu = data;
 193         struct bootmenu_entry *iter;
 194         enum bootmenu_key key = KEY_NONE;
 195         int esc = 0;
 196         int i;
 197
 198         while (1) {
 199                 if (menu->delay >= 0) {
 200                         /* Autoboot was not stopped */
 201                         bootmenu_autoboot_loop(menu, &key, &esc);
 202                 } else {
 203                         /* Some key was pressed, so autoboot was stopped */
 204                         bootmenu_loop(menu, &key, &esc);
 205                 }
 206
 207                 switch (key) {
 208                 case KEY_UP:
 209                         if (menu->active > 0)
 210                                 --menu->active;
 211                         /* no menu key selected, regenerate menu */
 212                         return NULL;
 213                 case KEY_DOWN:
 214                         if (menu->active < menu->count - 1)
 215                                 ++menu->active;
 216                         /* no menu key selected, regenerate menu */
 217                         return NULL;
 218                 case KEY_SELECT:
 219                         iter = menu->first;
 220                         for (i = 0; i < menu->active; ++i)
 221                                 iter = iter->next;
 222                         return iter->key;
 223                 default:
 224                         break;
 225                 }
 226         }
 227
 228         /* never happens */
 229         debug("bootmenu: this should not happen");
 230         return NULL;
 231 }
 232
 233 static void bootmenu_destroy(struct bootmenu_data *menu)
 234 {
 235         struct bootmenu_entry *iter = menu->first;
 236         struct bootmenu_entry *next;
 237
 238         while (iter) {
 239                 next = iter->next;
 240                 free(iter->title);
 241                 free(iter->command);
 242                 free(iter);
 243                 iter = next;
 244         }
 245         free(menu);
 246 }
 247
 248 static struct bootmenu_data *bootmenu_create(int delay)
 249 {
 250         unsigned short int i = 0;
 251         const char *option;
 252         struct bootmenu_data *menu;
 253         struct bootmenu_entry *iter = NULL;
 254
 255         int len;
 256         char *sep;
 257         struct bootmenu_entry *entry;
 258
 259         menu = malloc(sizeof(struct bootmenu_data));
 260         if (!menu)
 261                 return NULL;
 262
 263         menu->delay = delay;
 264         menu->active = 0;
 265         menu->first = NULL;
 266
 267         while ((option = bootmenu_getoption(i))) {
 268                 sep = strchr(option, '=');
 269                 if (!sep) {
 270                         printf("Invalid bootmenu entry: %s\n", option);
 271                         break;
 272                 }
 273
 274                 entry = malloc(sizeof(struct bootmenu_entry));
 275                 if (!entry)
 276                         goto cleanup;
 277
 278                 len = sep-option;
 279                 entry->title = malloc(len + 1);
 280                 if (!entry->title) {
 281                         free(entry);
 282                         goto cleanup;
 283                 }
 284                 memcpy(entry->title, option, len);
 285                 entry->title[len] = 0;
 286
 287                 len = strlen(sep + 1);
 288                 entry->command = malloc(len + 1);
 289                 if (!entry->command) {
 290                         free(entry->title);
 291                         free(entry);
 292                         goto cleanup;
 293                 }
 294                 memcpy(entry->command, sep + 1, len);
 295                 entry->command[len] = 0;
 296
 297                 sprintf(entry->key, "%d", i);
 298
 299                 entry->num = i;
 300                 entry->menu = menu;
 301                 entry->next = NULL;
 302
 303                 if (!iter)
 304                         menu->first = entry;
 305                 else
 306                         iter->next = entry;
 307
 308                 iter = entry;
 309                 ++i;
 310
 311                 if (i == MAX_COUNT - 1)
 312                         break;
 313         }
 314
 315         /* Add U-Boot console entry at the end */
 316         if (i <= MAX_COUNT - 1) {
 317                 entry = malloc(sizeof(struct bootmenu_entry));
 318                 if (!entry)
 319                         goto cleanup;
 320
 321                 entry->title = strdup("U-Boot console");
 322                 if (!entry->title) {
 323                         free(entry);
 324                         goto cleanup;
 325                 }
 326
 327                 entry->command = strdup("");
 328                 if (!entry->command) {
 329                         free(entry->title);
 330                         free(entry);
 331                         goto cleanup;
 332                 }
 333
 334                 sprintf(entry->key, "%d", i);
 335
 336                 entry->num = i;
 337                 entry->menu = menu;
 338                 entry->next = NULL;
 339
 340                 if (!iter)
 341                         menu->first = entry;
 342                 else
 343                         iter->next = entry;
 344
 345                 iter = entry;
 346                 ++i;
 347         }
 348
 349         menu->count = i;
 350         return menu;
 351
 352 cleanup:
 353         bootmenu_destroy(menu);
 354         return NULL;
 355 }
 356
 357 static void bootmenu_show(int delay)
 358 {
 359         int init = 0;
 360         void *choice = NULL;
 361         char *title = NULL;
 362         char *command = NULL;
 363         struct menu *menu;
 364         struct bootmenu_data *bootmenu;
 365         struct bootmenu_entry *iter;
 366         char *option, *sep;
 367
 368         /* If delay is 0 do not create menu, just run first entry */
 369         if (delay == 0) {
 370                 option = bootmenu_getoption(0);
 371                 if (!option) {
 372                         puts("bootmenu option 0 was not found\n");
 373                         return;
 374                 }
 375                 sep = strchr(option, '=');
 376                 if (!sep) {
 377                         puts("bootmenu option 0 is invalid\n");
 378                         return;
 379                 }
 380                 run_command(sep+1, 0);
 381                 return;
 382         }
 383
 384         bootmenu = bootmenu_create(delay);
 385         if (!bootmenu)
 386                 return;
 387
 388         menu = menu_create(NULL, bootmenu->delay, 1, bootmenu_print_entry,
 389                            bootmenu_choice_entry, bootmenu);
 390         if (!menu) {
 391                 bootmenu_destroy(bootmenu);
 392                 return;
 393         }
 394
 395         for (iter = bootmenu->first; iter; iter = iter->next) {
 396                 if (!menu_item_add(menu, iter->key, iter))
 397                         goto cleanup;
 398         }
 399
 400         /* Default menu entry is always first */
 401         menu_default_set(menu, "0");
 402
 403         puts(ANSI_CURSOR_HIDE);
 404         puts(ANSI_CLEAR_CONSOLE);
 405         printf(ANSI_CURSOR_POSITION, 1, 1);
 406
 407         init = 1;
 408
 409         if (menu_get_choice(menu, &choice)) {
 410                 iter = choice;
 411                 title = strdup(iter->title);
 412                 command = strdup(iter->command);
 413         }
 414
 415 cleanup:
 416         menu_destroy(menu);
 417         bootmenu_destroy(bootmenu);
 418
 419         if (init) {
 420                 puts(ANSI_CURSOR_SHOW);
 421                 puts(ANSI_CLEAR_CONSOLE);
 422                 printf(ANSI_CURSOR_POSITION, 1, 1);
 423         }
 424
 425         if (title && command) {
 426                 debug("Starting entry '%s'\n", title);
 427                 free(title);
 428                 run_command(command, 0);
 429                 free(command);
 430         }
 431
 432 #ifdef CONFIG_POSTBOOTMENU
 433         run_command(CONFIG_POSTBOOTMENU, 0);
 434 #endif
 435 }
 436
 437 void menu_display_statusline(struct menu *m)
 438 {
 439         struct bootmenu_entry *entry;
 440         struct bootmenu_data *menu;
 441
 442         if (menu_default_choice(m, (void *)&entry) < 0)
 443                 return;
 444
 445         menu = entry->menu;
 446
 447         printf(ANSI_CURSOR_POSITION, 1, 1);
 448         puts(ANSI_CLEAR_LINE);
 449         printf(ANSI_CURSOR_POSITION, 2, 1);
 450         puts("  *** U-Boot Boot Menu ***");
 451         puts(ANSI_CLEAR_LINE_TO_END);
 452         printf(ANSI_CURSOR_POSITION, 3, 1);
 453         puts(ANSI_CLEAR_LINE);
 454
 455         /* First 3 lines are bootmenu header + 2 empty lines between entries */
 456         printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
 457         puts(ANSI_CLEAR_LINE);
 458         printf(ANSI_CURSOR_POSITION, menu->count + 6, 1);
 459         puts("  Press UP/DOWN to move, ENTER to select");
 460         puts(ANSI_CLEAR_LINE_TO_END);
 461         printf(ANSI_CURSOR_POSITION, menu->count + 7, 1);
 462         puts(ANSI_CLEAR_LINE);
 463 }
 464
 465 #ifdef CONFIG_MENU_SHOW
 466 int menu_show(int bootdelay)
 467 {
 468         bootmenu_show(bootdelay);
 469         return -1; /* -1 - abort boot and run monitor code */
 470 }
 471 #endif
 472
 473 int do_bootmenu(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 474 {
 475         char *delay_str = NULL;
 476         int delay = 10;
 477
 478 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 479         delay = CONFIG_BOOTDELAY;
 480 #endif
 481
 482         if (argc >= 2)
 483                 delay_str = argv[1];
 484
 485         if (!delay_str)
 486                 delay_str = env_get("bootmenu_delay");
 487
 488         if (delay_str)
 489                 delay = (int)simple_strtol(delay_str, NULL, 10);
 490
 491         bootmenu_show(delay);
 492         return 0;
 493 }
 494
 495 U_BOOT_CMD(
 496         bootmenu, 2, 1, do_bootmenu,
 497         "ANSI terminal bootmenu",
 498         "[delay]\n"
 499         "    - show ANSI terminal bootmenu with autoboot delay"
 500 );