common/console.c

   1 /*
   2  * (C) Copyright 2000
   3  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <console.h>
  10 #include <debug_uart.h>
  11 #include <stdarg.h>
  12 #include <iomux.h>
  13 #include <malloc.h>
  14 #include <mapmem.h>
  15 #include <os.h>
  16 #include <serial.h>
  17 #include <stdio_dev.h>
  18 #include <exports.h>
  19 #include <environment.h>
  20 #include <watchdog.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 static int on_console(const char *name, const char *value, enum env_op op,
  25         int flags)
  26 {
  27         int console = -1;
  28
  29         /* Check for console redirection */
  30         if (strcmp(name, "stdin") == 0)
  31                 console = stdin;
  32         else if (strcmp(name, "stdout") == 0)
  33                 console = stdout;
  34         else if (strcmp(name, "stderr") == 0)
  35                 console = stderr;
  36
  37         /* if not actually setting a console variable, we don't care */
  38         if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
  39                 return 0;
  40
  41         switch (op) {
  42         case env_op_create:
  43         case env_op_overwrite:
  44
  45 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
  46                 if (iomux_doenv(console, value))
  47                         return 1;
  48 #else
  49                 /* Try assigning specified device */
  50                 if (console_assign(console, value) < 0)
  51                         return 1;
  52 #endif
  53                 return 0;
  54
  55         case env_op_delete:
  56                 if ((flags & H_FORCE) == 0)
  57                         printf("Can't delete \"%s\"\n", name);
  58                 return 1;
  59
  60         default:
  61                 return 0;
  62         }
  63 }
  64 U_BOOT_ENV_CALLBACK(console, on_console);
  65
  66 #ifdef CONFIG_SILENT_CONSOLE
  67 static int on_silent(const char *name, const char *value, enum env_op op,
  68         int flags)
  69 {
  70 #if !CONFIG_IS_ENABLED(CONFIG_SILENT_CONSOLE_UPDATE_ON_SET)
  71         if (flags & H_INTERACTIVE)
  72                 return 0;
  73 #endif
  74 #if !CONFIG_IS_ENABLED(CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC)
  75         if ((flags & H_INTERACTIVE) == 0)
  76                 return 0;
  77 #endif
  78
  79         if (value != NULL)
  80                 gd->flags |= GD_FLG_SILENT;
  81         else
  82                 gd->flags &= ~GD_FLG_SILENT;
  83
  84         return 0;
  85 }
  86 U_BOOT_ENV_CALLBACK(silent, on_silent);
  87 #endif
  88
  89 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
  90 /*
  91  * if overwrite_console returns 1, the stdin, stderr and stdout
  92  * are switched to the serial port, else the settings in the
  93  * environment are used
  94  */
  95 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
  96 extern int overwrite_console(void);
  97 #define OVERWRITE_CONSOLE overwrite_console()
  98 #else
  99 #define OVERWRITE_CONSOLE 0
 100 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
 101
 102 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 103
 104 static int console_setfile(int file, struct stdio_dev * dev)
 105 {
 106         int error = 0;
 107
 108         if (dev == NULL)
 109                 return -1;
 110
 111         switch (file) {
 112         case stdin:
 113         case stdout:
 114         case stderr:
 115                 /* Start new device */
 116                 if (dev->start) {
 117                         error = dev->start(dev);
 118                         /* If it's not started dont use it */
 119                         if (error < 0)
 120                                 break;
 121                 }
 122
 123                 /* Assign the new device (leaving the existing one started) */
 124                 stdio_devices[file] = dev;
 125
 126                 /*
 127                  * Update monitor functions
 128                  * (to use the console stuff by other applications)
 129                  */
 130                 switch (file) {
 131                 case stdin:
 132                         gd->jt->getc = getc;
 133                         gd->jt->tstc = tstc;
 134                         break;
 135                 case stdout:
 136                         gd->jt->putc  = putc;
 137                         gd->jt->puts  = puts;
 138                         gd->jt->printf = printf;
 139                         break;
 140                 }
 141                 break;
 142
 143         default:                /* Invalid file ID */
 144                 error = -1;
 145         }
 146         return error;
 147 }
 148
 149 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 150 /** Console I/O multiplexing *******************************************/
 151
 152 static struct stdio_dev *tstcdev;
 153 struct stdio_dev **console_devices[MAX_FILES];
 154 int cd_count[MAX_FILES];
 155
 156 /*
 157  * This depends on tstc() always being called before getc().
 158  * This is guaranteed to be true because this routine is called
 159  * only from fgetc() which assures it.
 160  * No attempt is made to demultiplex multiple input sources.
 161  */
 162 static int console_getc(int file)
 163 {
 164         unsigned char ret;
 165
 166         /* This is never called with testcdev == NULL */
 167         ret = tstcdev->getc(tstcdev);
 168         tstcdev = NULL;
 169         return ret;
 170 }
 171
 172 static int console_tstc(int file)
 173 {
 174         int i, ret;
 175         struct stdio_dev *dev;
 176
 177         disable_ctrlc(1);
 178         for (i = 0; i < cd_count[file]; i++) {
 179                 dev = console_devices[file][i];
 180                 if (dev->tstc != NULL) {
 181                         ret = dev->tstc(dev);
 182                         if (ret > 0) {
 183                                 tstcdev = dev;
 184                                 disable_ctrlc(0);
 185                                 return ret;
 186                         }
 187                 }
 188         }
 189         disable_ctrlc(0);
 190
 191         return 0;
 192 }
 193
 194 static void console_putc(int file, const char c)
 195 {
 196         int i;
 197         struct stdio_dev *dev;
 198
 199         for (i = 0; i < cd_count[file]; i++) {
 200                 dev = console_devices[file][i];
 201                 if (dev->putc != NULL)
 202                         dev->putc(dev, c);
 203         }
 204 }
 205
 206 static void console_puts_noserial(int file, const char *s)
 207 {
 208         int i;
 209         struct stdio_dev *dev;
 210
 211         for (i = 0; i < cd_count[file]; i++) {
 212                 dev = console_devices[file][i];
 213                 if (dev->puts != NULL && strcmp(dev->name, "serial") != 0)
 214                         dev->puts(dev, s);
 215         }
 216 }
 217
 218 static void console_puts(int file, const char *s)
 219 {
 220         int i;
 221         struct stdio_dev *dev;
 222
 223         for (i = 0; i < cd_count[file]; i++) {
 224                 dev = console_devices[file][i];
 225                 if (dev->puts != NULL)
 226                         dev->puts(dev, s);
 227         }
 228 }
 229
 230 static inline void console_doenv(int file, struct stdio_dev *dev)
 231 {
 232         iomux_doenv(file, dev->name);
 233 }
 234 #else
 235 static inline int console_getc(int file)
 236 {
 237         return stdio_devices[file]->getc(stdio_devices[file]);
 238 }
 239
 240 static inline int console_tstc(int file)
 241 {
 242         return stdio_devices[file]->tstc(stdio_devices[file]);
 243 }
 244
 245 static inline void console_putc(int file, const char c)
 246 {
 247         stdio_devices[file]->putc(stdio_devices[file], c);
 248 }
 249
 250 static inline void console_puts_noserial(int file, const char *s)
 251 {
 252         if (strcmp(stdio_devices[file]->name, "serial") != 0)
 253                 stdio_devices[file]->puts(stdio_devices[file], s);
 254 }
 255
 256 static inline void console_puts(int file, const char *s)
 257 {
 258         stdio_devices[file]->puts(stdio_devices[file], s);
 259 }
 260
 261 static inline void console_doenv(int file, struct stdio_dev *dev)
 262 {
 263         console_setfile(file, dev);
 264 }
 265 #endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
 266
 267 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 268
 269 int serial_printf(const char *fmt, ...)
 270 {
 271         va_list args;
 272         uint i;
 273         char printbuffer[CONFIG_SYS_PBSIZE];
 274
 275         va_start(args, fmt);
 276
 277         /* For this to work, printbuffer must be larger than
 278          * anything we ever want to print.
 279          */
 280         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 281         va_end(args);
 282
 283         serial_puts(printbuffer);
 284         return i;
 285 }
 286
 287 int fgetc(int file)
 288 {
 289         if (file < MAX_FILES) {
 290 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 291                 /*
 292                  * Effectively poll for input wherever it may be available.
 293                  */
 294                 for (;;) {
 295                         WATCHDOG_RESET();
 296                         /*
 297                          * Upper layer may have already called tstc() so
 298                          * check for that first.
 299                          */
 300                         if (tstcdev != NULL)
 301                                 return console_getc(file);
 302                         console_tstc(file);
 303 #ifdef CONFIG_WATCHDOG
 304                         /*
 305                          * If the watchdog must be rate-limited then it should
 306                          * already be handled in board-specific code.
 307                          */
 308                          udelay(1);
 309 #endif
 310                 }
 311 #else
 312                 return console_getc(file);
 313 #endif
 314         }
 315
 316         return -1;
 317 }
 318
 319 int ftstc(int file)
 320 {
 321         if (file < MAX_FILES)
 322                 return console_tstc(file);
 323
 324         return -1;
 325 }
 326
 327 void fputc(int file, const char c)
 328 {
 329         if (file < MAX_FILES)
 330                 console_putc(file, c);
 331 }
 332
 333 void fputs(int file, const char *s)
 334 {
 335         if (file < MAX_FILES)
 336                 console_puts(file, s);
 337 }
 338
 339 int fprintf(int file, const char *fmt, ...)
 340 {
 341         va_list args;
 342         uint i;
 343         char printbuffer[CONFIG_SYS_PBSIZE];
 344
 345         va_start(args, fmt);
 346
 347         /* For this to work, printbuffer must be larger than
 348          * anything we ever want to print.
 349          */
 350         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 351         va_end(args);
 352
 353         /* Send to desired file */
 354         fputs(file, printbuffer);
 355         return i;
 356 }
 357
 358 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 359
 360 int getc(void)
 361 {
 362 #ifdef CONFIG_DISABLE_CONSOLE
 363         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 364                 return 0;
 365 #endif
 366
 367         if (!gd->have_console)
 368                 return 0;
 369
 370 #ifdef CONFIG_CONSOLE_RECORD
 371         if (gd->console_in.start) {
 372                 int ch;
 373
 374                 ch = membuff_getbyte(&gd->console_in);
 375                 if (ch != -1)
 376                         return 1;
 377         }
 378 #endif
 379         if (gd->flags & GD_FLG_DEVINIT) {
 380                 /* Get from the standard input */
 381                 return fgetc(stdin);
 382         }
 383
 384         /* Send directly to the handler */
 385         return serial_getc();
 386 }
 387
 388 int tstc(void)
 389 {
 390 #ifdef CONFIG_DISABLE_CONSOLE
 391         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 392                 return 0;
 393 #endif
 394
 395         if (!gd->have_console)
 396                 return 0;
 397 #ifdef CONFIG_CONSOLE_RECORD
 398         if (gd->console_in.start) {
 399                 if (membuff_peekbyte(&gd->console_in) != -1)
 400                         return 1;
 401         }
 402 #endif
 403         if (gd->flags & GD_FLG_DEVINIT) {
 404                 /* Test the standard input */
 405                 return ftstc(stdin);
 406         }
 407
 408         /* Send directly to the handler */
 409         return serial_tstc();
 410 }
 411
 412 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 413 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 414
 415 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 416 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 417
 418 static void pre_console_putc(const char c)
 419 {
 420         char *buffer;
 421
 422         buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 423
 424         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 425
 426         unmap_sysmem(buffer);
 427 }
 428
 429 static void pre_console_puts(const char *s)
 430 {
 431         while (*s)
 432                 pre_console_putc(*s++);
 433 }
 434
 435 static void print_pre_console_buffer(int flushpoint)
 436 {
 437         unsigned long in = 0, out = 0;
 438         char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 439         char *buf_in;
 440
 441         buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 442         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 443                 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 444
 445         while (in < gd->precon_buf_idx)
 446                 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 447         unmap_sysmem(buf_in);
 448
 449         buf_out[out] = 0;
 450
 451         switch (flushpoint) {
 452         case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 453                 puts(buf_out);
 454                 break;
 455         case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 456                 console_puts_noserial(stdout, buf_out);
 457                 break;
 458         }
 459 }
 460 #else
 461 static inline void pre_console_putc(const char c) {}
 462 static inline void pre_console_puts(const char *s) {}
 463 static inline void print_pre_console_buffer(int flushpoint) {}
 464 #endif
 465
 466 void putc(const char c)
 467 {
 468 #ifdef CONFIG_SANDBOX
 469         /* sandbox can send characters to stdout before it has a console */
 470         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 471                 os_putc(c);
 472                 return;
 473         }
 474 #endif
 475 #ifdef CONFIG_DEBUG_UART
 476         /* if we don't have a console yet, use the debug UART */
 477         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 478                 printch(c);
 479                 return;
 480         }
 481 #endif
 482 #ifdef CONFIG_CONSOLE_RECORD
 483         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 484                 membuff_putbyte(&gd->console_out, c);
 485 #endif
 486 #ifdef CONFIG_SILENT_CONSOLE
 487         if (gd->flags & GD_FLG_SILENT)
 488                 return;
 489 #endif
 490
 491 #ifdef CONFIG_DISABLE_CONSOLE
 492         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 493                 return;
 494 #endif
 495
 496         if (!gd->have_console)
 497                 return pre_console_putc(c);
 498
 499         if (gd->flags & GD_FLG_DEVINIT) {
 500                 /* Send to the standard output */
 501                 fputc(stdout, c);
 502         } else {
 503                 /* Send directly to the handler */
 504                 pre_console_putc(c);
 505                 serial_putc(c);
 506         }
 507 }
 508
 509 void puts(const char *s)
 510 {
 511 #ifdef CONFIG_SANDBOX
 512         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 513                 os_puts(s);
 514                 return;
 515         }
 516 #endif
 517 #ifdef CONFIG_DEBUG_UART
 518         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 519                 while (*s) {
 520                         int ch = *s++;
 521
 522                         printch(ch);
 523                 }
 524                 return;
 525         }
 526 #endif
 527 #ifdef CONFIG_CONSOLE_RECORD
 528         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 529                 membuff_put(&gd->console_out, s, strlen(s));
 530 #endif
 531 #ifdef CONFIG_SILENT_CONSOLE
 532         if (gd->flags & GD_FLG_SILENT)
 533                 return;
 534 #endif
 535
 536 #ifdef CONFIG_DISABLE_CONSOLE
 537         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 538                 return;
 539 #endif
 540
 541         if (!gd->have_console)
 542                 return pre_console_puts(s);
 543
 544         if (gd->flags & GD_FLG_DEVINIT) {
 545                 /* Send to the standard output */
 546                 fputs(stdout, s);
 547         } else {
 548                 /* Send directly to the handler */
 549                 pre_console_puts(s);
 550                 serial_puts(s);
 551         }
 552 }
 553
 554 #ifdef CONFIG_CONSOLE_RECORD
 555 int console_record_init(void)
 556 {
 557         int ret;
 558
 559         ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
 560         if (ret)
 561                 return ret;
 562         ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
 563
 564         return ret;
 565 }
 566
 567 void console_record_reset(void)
 568 {
 569         membuff_purge(&gd->console_out);
 570         membuff_purge(&gd->console_in);
 571 }
 572
 573 void console_record_reset_enable(void)
 574 {
 575         console_record_reset();
 576         gd->flags |= GD_FLG_RECORD;
 577 }
 578 #endif
 579
 580 /* test if ctrl-c was pressed */
 581 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 582 static int ctrlc_was_pressed = 0;
 583 int ctrlc(void)
 584 {
 585 #ifndef CONFIG_SANDBOX
 586         if (!ctrlc_disabled && gd->have_console) {
 587                 if (tstc()) {
 588                         switch (getc()) {
 589                         case 0x03:              /* ^C - Control C */
 590                                 ctrlc_was_pressed = 1;
 591                                 return 1;
 592                         default:
 593                                 break;
 594                         }
 595                 }
 596         }
 597 #endif
 598
 599         return 0;
 600 }
 601 /* Reads user's confirmation.
 602    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 603 */
 604 int confirm_yesno(void)
 605 {
 606         int i;
 607         char str_input[5];
 608
 609         /* Flush input */
 610         while (tstc())
 611                 getc();
 612         i = 0;
 613         while (i < sizeof(str_input)) {
 614                 str_input[i] = getc();
 615                 putc(str_input[i]);
 616                 if (str_input[i] == '\r')
 617                         break;
 618                 i++;
 619         }
 620         putc('\n');
 621         if (strncmp(str_input, "y\r", 2) == 0 ||
 622             strncmp(str_input, "Y\r", 2) == 0 ||
 623             strncmp(str_input, "yes\r", 4) == 0 ||
 624             strncmp(str_input, "YES\r", 4) == 0)
 625                 return 1;
 626         return 0;
 627 }
 628 /* pass 1 to disable ctrlc() checking, 0 to enable.
 629  * returns previous state
 630  */
 631 int disable_ctrlc(int disable)
 632 {
 633         int prev = ctrlc_disabled;      /* save previous state */
 634
 635         ctrlc_disabled = disable;
 636         return prev;
 637 }
 638
 639 int had_ctrlc (void)
 640 {
 641         return ctrlc_was_pressed;
 642 }
 643
 644 void clear_ctrlc(void)
 645 {
 646         ctrlc_was_pressed = 0;
 647 }
 648
 649 /** U-Boot INIT FUNCTIONS *************************************************/
 650
 651 struct stdio_dev *search_device(int flags, const char *name)
 652 {
 653         struct stdio_dev *dev;
 654
 655         dev = stdio_get_by_name(name);
 656 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 657         if (!dev && !strcmp(name, "lcd"))
 658                 dev = stdio_get_by_name("vidconsole");
 659 #endif
 660
 661         if (dev && (dev->flags & flags))
 662                 return dev;
 663
 664         return NULL;
 665 }
 666
 667 int console_assign(int file, const char *devname)
 668 {
 669         int flag;
 670         struct stdio_dev *dev;
 671
 672         /* Check for valid file */
 673         switch (file) {
 674         case stdin:
 675                 flag = DEV_FLAGS_INPUT;
 676                 break;
 677         case stdout:
 678         case stderr:
 679                 flag = DEV_FLAGS_OUTPUT;
 680                 break;
 681         default:
 682                 return -1;
 683         }
 684
 685         /* Check for valid device name */
 686
 687         dev = search_device(flag, devname);
 688
 689         if (dev)
 690                 return console_setfile(file, dev);
 691
 692         return -1;
 693 }
 694
 695 static void console_update_silent(void)
 696 {
 697 #ifdef CONFIG_SILENT_CONSOLE
 698         if (getenv("silent") != NULL)
 699                 gd->flags |= GD_FLG_SILENT;
 700         else
 701                 gd->flags &= ~GD_FLG_SILENT;
 702 #endif
 703 }
 704
 705 int console_announce_r(void)
 706 {
 707 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 708         char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
 709
 710         display_options_get_banner(false, buf, sizeof(buf));
 711
 712         console_puts_noserial(stdout, buf);
 713 #endif
 714
 715         return 0;
 716 }
 717
 718 /* Called before relocation - use serial functions */
 719 int console_init_f(void)
 720 {
 721         gd->have_console = 1;
 722
 723         console_update_silent();
 724
 725         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 726
 727         return 0;
 728 }
 729
 730 void stdio_print_current_devices(void)
 731 {
 732         /* Print information */
 733         puts("In:    ");
 734         if (stdio_devices[stdin] == NULL) {
 735                 puts("No input devices available!\n");
 736         } else {
 737                 printf ("%s\n", stdio_devices[stdin]->name);
 738         }
 739
 740         puts("Out:   ");
 741         if (stdio_devices[stdout] == NULL) {
 742                 puts("No output devices available!\n");
 743         } else {
 744                 printf ("%s\n", stdio_devices[stdout]->name);
 745         }
 746
 747         puts("Err:   ");
 748         if (stdio_devices[stderr] == NULL) {
 749                 puts("No error devices available!\n");
 750         } else {
 751                 printf ("%s\n", stdio_devices[stderr]->name);
 752         }
 753 }
 754
 755 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 756 /* Called after the relocation - use desired console functions */
 757 int console_init_r(void)
 758 {
 759         char *stdinname, *stdoutname, *stderrname;
 760         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 761 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 762         int i;
 763 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 764 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 765         int iomux_err = 0;
 766 #endif
 767
 768         /* set default handlers at first */
 769         gd->jt->getc  = serial_getc;
 770         gd->jt->tstc  = serial_tstc;
 771         gd->jt->putc  = serial_putc;
 772         gd->jt->puts  = serial_puts;
 773         gd->jt->printf = serial_printf;
 774
 775         /* stdin stdout and stderr are in environment */
 776         /* scan for it */
 777         stdinname  = getenv("stdin");
 778         stdoutname = getenv("stdout");
 779         stderrname = getenv("stderr");
 780
 781         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 782                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 783                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 784                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 785 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 786                 iomux_err = iomux_doenv(stdin, stdinname);
 787                 iomux_err += iomux_doenv(stdout, stdoutname);
 788                 iomux_err += iomux_doenv(stderr, stderrname);
 789                 if (!iomux_err)
 790                         /* Successful, so skip all the code below. */
 791                         goto done;
 792 #endif
 793         }
 794         /* if the devices are overwritten or not found, use default device */
 795         if (inputdev == NULL) {
 796                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 797         }
 798         if (outputdev == NULL) {
 799                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 800         }
 801         if (errdev == NULL) {
 802                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 803         }
 804         /* Initializes output console first */
 805         if (outputdev != NULL) {
 806                 /* need to set a console if not done above. */
 807                 console_doenv(stdout, outputdev);
 808         }
 809         if (errdev != NULL) {
 810                 /* need to set a console if not done above. */
 811                 console_doenv(stderr, errdev);
 812         }
 813         if (inputdev != NULL) {
 814                 /* need to set a console if not done above. */
 815                 console_doenv(stdin, inputdev);
 816         }
 817
 818 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 819 done:
 820 #endif
 821
 822 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 823         stdio_print_current_devices();
 824 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 825 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 826         if (strstr(stdoutname, "lcd"))
 827                 printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
 828 #endif
 829
 830 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 831         /* set the environment variables (will overwrite previous env settings) */
 832         for (i = 0; i < 3; i++) {
 833                 setenv(stdio_names[i], stdio_devices[i]->name);
 834         }
 835 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 836
 837         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 838
 839 #if 0
 840         /* If nothing usable installed, use only the initial console */
 841         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 842                 return 0;
 843 #endif
 844         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 845         return 0;
 846 }
 847
 848 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 849
 850 /* Called after the relocation - use desired console functions */
 851 int console_init_r(void)
 852 {
 853         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 854         int i;
 855         struct list_head *list = stdio_get_list();
 856         struct list_head *pos;
 857         struct stdio_dev *dev;
 858
 859         console_update_silent();
 860
 861 #ifdef CONFIG_SPLASH_SCREEN
 862         /*
 863          * suppress all output if splash screen is enabled and we have
 864          * a bmp to display. We redirect the output from frame buffer
 865          * console to serial console in this case or suppress it if
 866          * "silent" mode was requested.
 867          */
 868         if (getenv("splashimage") != NULL) {
 869                 if (!(gd->flags & GD_FLG_SILENT))
 870                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 871         }
 872 #endif
 873
 874         /* Scan devices looking for input and output devices */
 875         list_for_each(pos, list) {
 876                 dev = list_entry(pos, struct stdio_dev, list);
 877
 878                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 879                         inputdev = dev;
 880                 }
 881                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 882                         outputdev = dev;
 883                 }
 884                 if(inputdev && outputdev)
 885                         break;
 886         }
 887
 888         /* Initializes output console first */
 889         if (outputdev != NULL) {
 890                 console_setfile(stdout, outputdev);
 891                 console_setfile(stderr, outputdev);
 892 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 893                 console_devices[stdout][0] = outputdev;
 894                 console_devices[stderr][0] = outputdev;
 895 #endif
 896         }
 897
 898         /* Initializes input console */
 899         if (inputdev != NULL) {
 900                 console_setfile(stdin, inputdev);
 901 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 902                 console_devices[stdin][0] = inputdev;
 903 #endif
 904         }
 905
 906 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 907         stdio_print_current_devices();
 908 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 909
 910         /* Setting environment variables */
 911         for (i = 0; i < 3; i++) {
 912                 setenv(stdio_names[i], stdio_devices[i]->name);
 913         }
 914
 915         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 916
 917 #if 0
 918         /* If nothing usable installed, use only the initial console */
 919         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 920                 return 0;
 921 #endif
 922         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 923         return 0;
 924 }
 925
 926 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */