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