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 <stdarg.h>
  10 #include <iomux.h>
  11 #include <malloc.h>
  12 #include <os.h>
  13 #include <serial.h>
  14 #include <stdio_dev.h>
  15 #include <exports.h>
  16 #include <environment.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 static int on_console(const char *name, const char *value, enum env_op op,
  21         int flags)
  22 {
  23         int console = -1;
  24
  25         /* Check for console redirection */
  26         if (strcmp(name, "stdin") == 0)
  27                 console = stdin;
  28         else if (strcmp(name, "stdout") == 0)
  29                 console = stdout;
  30         else if (strcmp(name, "stderr") == 0)
  31                 console = stderr;
  32
  33         /* if not actually setting a console variable, we don't care */
  34         if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
  35                 return 0;
  36
  37         switch (op) {
  38         case env_op_create:
  39         case env_op_overwrite:
  40
  41 #ifdef CONFIG_CONSOLE_MUX
  42                 if (iomux_doenv(console, value))
  43                         return 1;
  44 #else
  45                 /* Try assigning specified device */
  46                 if (console_assign(console, value) < 0)
  47                         return 1;
  48 #endif /* CONFIG_CONSOLE_MUX */
  49                 return 0;
  50
  51         case env_op_delete:
  52                 if ((flags & H_FORCE) == 0)
  53                         printf("Can't delete \"%s\"\n", name);
  54                 return 1;
  55
  56         default:
  57                 return 0;
  58         }
  59 }
  60 U_BOOT_ENV_CALLBACK(console, on_console);
  61
  62 #ifdef CONFIG_SILENT_CONSOLE
  63 static int on_silent(const char *name, const char *value, enum env_op op,
  64         int flags)
  65 {
  66 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
  67         if (flags & H_INTERACTIVE)
  68                 return 0;
  69 #endif
  70 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
  71         if ((flags & H_INTERACTIVE) == 0)
  72                 return 0;
  73 #endif
  74
  75         if (value != NULL)
  76                 gd->flags |= GD_FLG_SILENT;
  77         else
  78                 gd->flags &= ~GD_FLG_SILENT;
  79
  80         return 0;
  81 }
  82 U_BOOT_ENV_CALLBACK(silent, on_silent);
  83 #endif
  84
  85 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
  86 /*
  87  * if overwrite_console returns 1, the stdin, stderr and stdout
  88  * are switched to the serial port, else the settings in the
  89  * environment are used
  90  */
  91 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
  92 extern int overwrite_console(void);
  93 #define OVERWRITE_CONSOLE overwrite_console()
  94 #else
  95 #define OVERWRITE_CONSOLE 0
  96 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
  97
  98 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
  99
 100 static int console_setfile(int file, struct stdio_dev * dev)
 101 {
 102         int error = 0;
 103
 104         if (dev == NULL)
 105                 return -1;
 106
 107         switch (file) {
 108         case stdin:
 109         case stdout:
 110         case stderr:
 111                 /* Start new device */
 112                 if (dev->start) {
 113                         error = dev->start(dev);
 114                         /* If it's not started dont use it */
 115                         if (error < 0)
 116                                 break;
 117                 }
 118
 119                 /* Assign the new device (leaving the existing one started) */
 120                 stdio_devices[file] = dev;
 121
 122                 /*
 123                  * Update monitor functions
 124                  * (to use the console stuff by other applications)
 125                  */
 126                 switch (file) {
 127                 case stdin:
 128                         gd->jt[XF_getc] = getc;
 129                         gd->jt[XF_tstc] = tstc;
 130                         break;
 131                 case stdout:
 132                         gd->jt[XF_putc] = putc;
 133                         gd->jt[XF_puts] = puts;
 134                         gd->jt[XF_printf] = printf;
 135                         break;
 136                 }
 137                 break;
 138
 139         default:                /* Invalid file ID */
 140                 error = -1;
 141         }
 142         return error;
 143 }
 144
 145 #if defined(CONFIG_CONSOLE_MUX)
 146 /** Console I/O multiplexing *******************************************/
 147
 148 static struct stdio_dev *tstcdev;
 149 struct stdio_dev **console_devices[MAX_FILES];
 150 int cd_count[MAX_FILES];
 151
 152 /*
 153  * This depends on tstc() always being called before getc().
 154  * This is guaranteed to be true because this routine is called
 155  * only from fgetc() which assures it.
 156  * No attempt is made to demultiplex multiple input sources.
 157  */
 158 static int console_getc(int file)
 159 {
 160         unsigned char ret;
 161
 162         /* This is never called with testcdev == NULL */
 163         ret = tstcdev->getc(tstcdev);
 164         tstcdev = NULL;
 165         return ret;
 166 }
 167
 168 static int console_tstc(int file)
 169 {
 170         int i, ret;
 171         struct stdio_dev *dev;
 172
 173         disable_ctrlc(1);
 174         for (i = 0; i < cd_count[file]; i++) {
 175                 dev = console_devices[file][i];
 176                 if (dev->tstc != NULL) {
 177                         ret = dev->tstc(dev);
 178                         if (ret > 0) {
 179                                 tstcdev = dev;
 180                                 disable_ctrlc(0);
 181                                 return ret;
 182                         }
 183                 }
 184         }
 185         disable_ctrlc(0);
 186
 187         return 0;
 188 }
 189
 190 static void console_putc(int file, const char c)
 191 {
 192         int i;
 193         struct stdio_dev *dev;
 194
 195         for (i = 0; i < cd_count[file]; i++) {
 196                 dev = console_devices[file][i];
 197                 if (dev->putc != NULL)
 198                         dev->putc(dev, c);
 199         }
 200 }
 201
 202 static void console_puts(int file, const char *s)
 203 {
 204         int i;
 205         struct stdio_dev *dev;
 206
 207         for (i = 0; i < cd_count[file]; i++) {
 208                 dev = console_devices[file][i];
 209                 if (dev->puts != NULL)
 210                         dev->puts(dev, s);
 211         }
 212 }
 213
 214 static inline void console_printdevs(int file)
 215 {
 216         iomux_printdevs(file);
 217 }
 218
 219 static inline void console_doenv(int file, struct stdio_dev *dev)
 220 {
 221         iomux_doenv(file, dev->name);
 222 }
 223 #else
 224 static inline int console_getc(int file)
 225 {
 226         return stdio_devices[file]->getc(stdio_devices[file]);
 227 }
 228
 229 static inline int console_tstc(int file)
 230 {
 231         return stdio_devices[file]->tstc(stdio_devices[file]);
 232 }
 233
 234 static inline void console_putc(int file, const char c)
 235 {
 236         stdio_devices[file]->putc(stdio_devices[file], c);
 237 }
 238
 239 static inline void console_puts(int file, const char *s)
 240 {
 241         stdio_devices[file]->puts(stdio_devices[file], s);
 242 }
 243
 244 static inline void console_printdevs(int file)
 245 {
 246         printf("%s\n", stdio_devices[file]->name);
 247 }
 248
 249 static inline void console_doenv(int file, struct stdio_dev *dev)
 250 {
 251         console_setfile(file, dev);
 252 }
 253 #endif /* defined(CONFIG_CONSOLE_MUX) */
 254
 255 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 256
 257 int serial_printf(const char *fmt, ...)
 258 {
 259         va_list args;
 260         uint i;
 261         char printbuffer[CONFIG_SYS_PBSIZE];
 262
 263         va_start(args, fmt);
 264
 265         /* For this to work, printbuffer must be larger than
 266          * anything we ever want to print.
 267          */
 268         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 269         va_end(args);
 270
 271         serial_puts(printbuffer);
 272         return i;
 273 }
 274
 275 int fgetc(int file)
 276 {
 277         if (file < MAX_FILES) {
 278 #if defined(CONFIG_CONSOLE_MUX)
 279                 /*
 280                  * Effectively poll for input wherever it may be available.
 281                  */
 282                 for (;;) {
 283                         /*
 284                          * Upper layer may have already called tstc() so
 285                          * check for that first.
 286                          */
 287                         if (tstcdev != NULL)
 288                                 return console_getc(file);
 289                         console_tstc(file);
 290 #ifdef CONFIG_WATCHDOG
 291                         /*
 292                          * If the watchdog must be rate-limited then it should
 293                          * already be handled in board-specific code.
 294                          */
 295                          udelay(1);
 296 #endif
 297                 }
 298 #else
 299                 return console_getc(file);
 300 #endif
 301         }
 302
 303         return -1;
 304 }
 305
 306 int ftstc(int file)
 307 {
 308         if (file < MAX_FILES)
 309                 return console_tstc(file);
 310
 311         return -1;
 312 }
 313
 314 void fputc(int file, const char c)
 315 {
 316         if (file < MAX_FILES)
 317                 console_putc(file, c);
 318 }
 319
 320 void fputs(int file, const char *s)
 321 {
 322         if (file < MAX_FILES)
 323                 console_puts(file, s);
 324 }
 325
 326 int fprintf(int file, const char *fmt, ...)
 327 {
 328         va_list args;
 329         uint i;
 330         char printbuffer[CONFIG_SYS_PBSIZE];
 331
 332         va_start(args, fmt);
 333
 334         /* For this to work, printbuffer must be larger than
 335          * anything we ever want to print.
 336          */
 337         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 338         va_end(args);
 339
 340         /* Send to desired file */
 341         fputs(file, printbuffer);
 342         return i;
 343 }
 344
 345 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 346
 347 int getc(void)
 348 {
 349 #ifdef CONFIG_DISABLE_CONSOLE
 350         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 351                 return 0;
 352 #endif
 353
 354         if (!gd->have_console)
 355                 return 0;
 356
 357         if (gd->flags & GD_FLG_DEVINIT) {
 358                 /* Get from the standard input */
 359                 return fgetc(stdin);
 360         }
 361
 362         /* Send directly to the handler */
 363         return serial_getc();
 364 }
 365
 366 int tstc(void)
 367 {
 368 #ifdef CONFIG_DISABLE_CONSOLE
 369         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 370                 return 0;
 371 #endif
 372
 373         if (!gd->have_console)
 374                 return 0;
 375
 376         if (gd->flags & GD_FLG_DEVINIT) {
 377                 /* Test the standard input */
 378                 return ftstc(stdin);
 379         }
 380
 381         /* Send directly to the handler */
 382         return serial_tstc();
 383 }
 384
 385 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 386 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 387
 388 static void pre_console_putc(const char c)
 389 {
 390         char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
 391
 392         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 393 }
 394
 395 static void pre_console_puts(const char *s)
 396 {
 397         while (*s)
 398                 pre_console_putc(*s++);
 399 }
 400
 401 static void print_pre_console_buffer(void)
 402 {
 403         unsigned long i = 0;
 404         char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
 405
 406         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 407                 i = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 408
 409         while (i < gd->precon_buf_idx)
 410                 putc(buffer[CIRC_BUF_IDX(i++)]);
 411 }
 412 #else
 413 static inline void pre_console_putc(const char c) {}
 414 static inline void pre_console_puts(const char *s) {}
 415 static inline void print_pre_console_buffer(void) {}
 416 #endif
 417
 418 void putc(const char c)
 419 {
 420 #ifdef CONFIG_SANDBOX
 421         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 422                 os_putc(c);
 423                 return;
 424         }
 425 #endif
 426 #ifdef CONFIG_SILENT_CONSOLE
 427         if (gd->flags & GD_FLG_SILENT)
 428                 return;
 429 #endif
 430
 431 #ifdef CONFIG_DISABLE_CONSOLE
 432         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 433                 return;
 434 #endif
 435
 436         if (!gd->have_console)
 437                 return pre_console_putc(c);
 438
 439         if (gd->flags & GD_FLG_DEVINIT) {
 440                 /* Send to the standard output */
 441                 fputc(stdout, c);
 442         } else {
 443                 /* Send directly to the handler */
 444                 serial_putc(c);
 445         }
 446 }
 447
 448 void puts(const char *s)
 449 {
 450 #ifdef CONFIG_SANDBOX
 451         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 452                 os_puts(s);
 453                 return;
 454         }
 455 #endif
 456
 457 #ifdef CONFIG_SILENT_CONSOLE
 458         if (gd->flags & GD_FLG_SILENT)
 459                 return;
 460 #endif
 461
 462 #ifdef CONFIG_DISABLE_CONSOLE
 463         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 464                 return;
 465 #endif
 466
 467         if (!gd->have_console)
 468                 return pre_console_puts(s);
 469
 470         if (gd->flags & GD_FLG_DEVINIT) {
 471                 /* Send to the standard output */
 472                 fputs(stdout, s);
 473         } else {
 474                 /* Send directly to the handler */
 475                 serial_puts(s);
 476         }
 477 }
 478
 479 int printf(const char *fmt, ...)
 480 {
 481         va_list args;
 482         uint i;
 483         char printbuffer[CONFIG_SYS_PBSIZE];
 484
 485 #if !defined(CONFIG_SANDBOX) && !defined(CONFIG_PRE_CONSOLE_BUFFER)
 486         if (!gd->have_console)
 487                 return 0;
 488 #endif
 489
 490         va_start(args, fmt);
 491
 492         /* For this to work, printbuffer must be larger than
 493          * anything we ever want to print.
 494          */
 495         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 496         va_end(args);
 497
 498         /* Print the string */
 499         puts(printbuffer);
 500         return i;
 501 }
 502
 503 int vprintf(const char *fmt, va_list args)
 504 {
 505         uint i;
 506         char printbuffer[CONFIG_SYS_PBSIZE];
 507
 508 #if defined(CONFIG_PRE_CONSOLE_BUFFER) && !defined(CONFIG_SANDBOX)
 509         if (!gd->have_console)
 510                 return 0;
 511 #endif
 512
 513         /* For this to work, printbuffer must be larger than
 514          * anything we ever want to print.
 515          */
 516         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 517
 518         /* Print the string */
 519         puts(printbuffer);
 520         return i;
 521 }
 522
 523 /* test if ctrl-c was pressed */
 524 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 525 static int ctrlc_was_pressed = 0;
 526 int ctrlc(void)
 527 {
 528 #ifndef CONFIG_SANDBOX
 529         if (!ctrlc_disabled && gd->have_console) {
 530                 if (tstc()) {
 531                         switch (getc()) {
 532                         case 0x03:              /* ^C - Control C */
 533                                 ctrlc_was_pressed = 1;
 534                                 return 1;
 535                         default:
 536                                 break;
 537                         }
 538                 }
 539         }
 540 #endif
 541
 542         return 0;
 543 }
 544 /* Reads user's confirmation.
 545    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 546 */
 547 int confirm_yesno(void)
 548 {
 549         int i;
 550         char str_input[5];
 551
 552         /* Flush input */
 553         while (tstc())
 554                 getc();
 555         i = 0;
 556         while (i < sizeof(str_input)) {
 557                 str_input[i] = getc();
 558                 putc(str_input[i]);
 559                 if (str_input[i] == '\r')
 560                         break;
 561                 i++;
 562         }
 563         putc('\n');
 564         if (strncmp(str_input, "y\r", 2) == 0 ||
 565             strncmp(str_input, "Y\r", 2) == 0 ||
 566             strncmp(str_input, "yes\r", 4) == 0 ||
 567             strncmp(str_input, "YES\r", 4) == 0)
 568                 return 1;
 569         return 0;
 570 }
 571 /* pass 1 to disable ctrlc() checking, 0 to enable.
 572  * returns previous state
 573  */
 574 int disable_ctrlc(int disable)
 575 {
 576         int prev = ctrlc_disabled;      /* save previous state */
 577
 578         ctrlc_disabled = disable;
 579         return prev;
 580 }
 581
 582 int had_ctrlc (void)
 583 {
 584         return ctrlc_was_pressed;
 585 }
 586
 587 void clear_ctrlc(void)
 588 {
 589         ctrlc_was_pressed = 0;
 590 }
 591
 592 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
 593 char    screen[1024];
 594 char *cursor = screen;
 595 int once = 0;
 596 inline void dbg(const char *fmt, ...)
 597 {
 598         va_list args;
 599         uint    i;
 600         char    printbuffer[CONFIG_SYS_PBSIZE];
 601
 602         if (!once) {
 603                 memset(screen, 0, sizeof(screen));
 604                 once++;
 605         }
 606
 607         va_start(args, fmt);
 608
 609         /* For this to work, printbuffer must be larger than
 610          * anything we ever want to print.
 611          */
 612         i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 613         va_end(args);
 614
 615         if ((screen + sizeof(screen) - 1 - cursor)
 616             < strlen(printbuffer) + 1) {
 617                 memset(screen, 0, sizeof(screen));
 618                 cursor = screen;
 619         }
 620         sprintf(cursor, printbuffer);
 621         cursor += strlen(printbuffer);
 622
 623 }
 624 #else
 625 static inline void dbg(const char *fmt, ...)
 626 {
 627 }
 628 #endif
 629
 630 /** U-Boot INIT FUNCTIONS *************************************************/
 631
 632 struct stdio_dev *search_device(int flags, const char *name)
 633 {
 634         struct stdio_dev *dev;
 635
 636         dev = stdio_get_by_name(name);
 637
 638         if (dev && (dev->flags & flags))
 639                 return dev;
 640
 641         return NULL;
 642 }
 643
 644 int console_assign(int file, const char *devname)
 645 {
 646         int flag;
 647         struct stdio_dev *dev;
 648
 649         /* Check for valid file */
 650         switch (file) {
 651         case stdin:
 652                 flag = DEV_FLAGS_INPUT;
 653                 break;
 654         case stdout:
 655         case stderr:
 656                 flag = DEV_FLAGS_OUTPUT;
 657                 break;
 658         default:
 659                 return -1;
 660         }
 661
 662         /* Check for valid device name */
 663
 664         dev = search_device(flag, devname);
 665
 666         if (dev)
 667                 return console_setfile(file, dev);
 668
 669         return -1;
 670 }
 671
 672 /* Called before relocation - use serial functions */
 673 int console_init_f(void)
 674 {
 675         gd->have_console = 1;
 676
 677 #ifdef CONFIG_SILENT_CONSOLE
 678         if (getenv("silent") != NULL)
 679                 gd->flags |= GD_FLG_SILENT;
 680 #endif
 681
 682         print_pre_console_buffer();
 683
 684         return 0;
 685 }
 686
 687 void stdio_print_current_devices(void)
 688 {
 689         /* Print information */
 690         puts("In:    ");
 691         if (stdio_devices[stdin] == NULL) {
 692                 puts("No input devices available!\n");
 693         } else {
 694                 printf ("%s\n", stdio_devices[stdin]->name);
 695         }
 696
 697         puts("Out:   ");
 698         if (stdio_devices[stdout] == NULL) {
 699                 puts("No output devices available!\n");
 700         } else {
 701                 printf ("%s\n", stdio_devices[stdout]->name);
 702         }
 703
 704         puts("Err:   ");
 705         if (stdio_devices[stderr] == NULL) {
 706                 puts("No error devices available!\n");
 707         } else {
 708                 printf ("%s\n", stdio_devices[stderr]->name);
 709         }
 710 }
 711
 712 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
 713 /* Called after the relocation - use desired console functions */
 714 int console_init_r(void)
 715 {
 716         char *stdinname, *stdoutname, *stderrname;
 717         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 718 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 719         int i;
 720 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 721 #ifdef CONFIG_CONSOLE_MUX
 722         int iomux_err = 0;
 723 #endif
 724
 725         /* set default handlers at first */
 726         gd->jt[XF_getc] = serial_getc;
 727         gd->jt[XF_tstc] = serial_tstc;
 728         gd->jt[XF_putc] = serial_putc;
 729         gd->jt[XF_puts] = serial_puts;
 730         gd->jt[XF_printf] = serial_printf;
 731
 732         /* stdin stdout and stderr are in environment */
 733         /* scan for it */
 734         stdinname  = getenv("stdin");
 735         stdoutname = getenv("stdout");
 736         stderrname = getenv("stderr");
 737
 738         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 739                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 740                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 741                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 742 #ifdef CONFIG_CONSOLE_MUX
 743                 iomux_err = iomux_doenv(stdin, stdinname);
 744                 iomux_err += iomux_doenv(stdout, stdoutname);
 745                 iomux_err += iomux_doenv(stderr, stderrname);
 746                 if (!iomux_err)
 747                         /* Successful, so skip all the code below. */
 748                         goto done;
 749 #endif
 750         }
 751         /* if the devices are overwritten or not found, use default device */
 752         if (inputdev == NULL) {
 753                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 754         }
 755         if (outputdev == NULL) {
 756                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 757         }
 758         if (errdev == NULL) {
 759                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 760         }
 761         /* Initializes output console first */
 762         if (outputdev != NULL) {
 763                 /* need to set a console if not done above. */
 764                 console_doenv(stdout, outputdev);
 765         }
 766         if (errdev != NULL) {
 767                 /* need to set a console if not done above. */
 768                 console_doenv(stderr, errdev);
 769         }
 770         if (inputdev != NULL) {
 771                 /* need to set a console if not done above. */
 772                 console_doenv(stdin, inputdev);
 773         }
 774
 775 #ifdef CONFIG_CONSOLE_MUX
 776 done:
 777 #endif
 778
 779 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 780         stdio_print_current_devices();
 781 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 782
 783 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 784         /* set the environment variables (will overwrite previous env settings) */
 785         for (i = 0; i < 3; i++) {
 786                 setenv(stdio_names[i], stdio_devices[i]->name);
 787         }
 788 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 789
 790         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 791
 792 #if 0
 793         /* If nothing usable installed, use only the initial console */
 794         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 795                 return 0;
 796 #endif
 797         return 0;
 798 }
 799
 800 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
 801
 802 /* Called after the relocation - use desired console functions */
 803 int console_init_r(void)
 804 {
 805         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 806         int i;
 807         struct list_head *list = stdio_get_list();
 808         struct list_head *pos;
 809         struct stdio_dev *dev;
 810
 811 #ifdef CONFIG_SPLASH_SCREEN
 812         /*
 813          * suppress all output if splash screen is enabled and we have
 814          * a bmp to display. We redirect the output from frame buffer
 815          * console to serial console in this case or suppress it if
 816          * "silent" mode was requested.
 817          */
 818         if (getenv("splashimage") != NULL) {
 819                 if (!(gd->flags & GD_FLG_SILENT))
 820                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 821         }
 822 #endif
 823
 824         /* Scan devices looking for input and output devices */
 825         list_for_each(pos, list) {
 826                 dev = list_entry(pos, struct stdio_dev, list);
 827
 828                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 829                         inputdev = dev;
 830                 }
 831                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 832                         outputdev = dev;
 833                 }
 834                 if(inputdev && outputdev)
 835                         break;
 836         }
 837
 838         /* Initializes output console first */
 839         if (outputdev != NULL) {
 840                 console_setfile(stdout, outputdev);
 841                 console_setfile(stderr, outputdev);
 842 #ifdef CONFIG_CONSOLE_MUX
 843                 console_devices[stdout][0] = outputdev;
 844                 console_devices[stderr][0] = outputdev;
 845 #endif
 846         }
 847
 848         /* Initializes input console */
 849         if (inputdev != NULL) {
 850                 console_setfile(stdin, inputdev);
 851 #ifdef CONFIG_CONSOLE_MUX
 852                 console_devices[stdin][0] = inputdev;
 853 #endif
 854         }
 855
 856 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 857         stdio_print_current_devices();
 858 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 859
 860         /* Setting environment variables */
 861         for (i = 0; i < 3; i++) {
 862                 setenv(stdio_names[i], stdio_devices[i]->name);
 863         }
 864
 865         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 866
 867 #if 0
 868         /* If nothing usable installed, use only the initial console */
 869         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 870                 return 0;
 871 #endif
 872
 873         return 0;
 874 }
 875
 876 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */