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