common/console.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000
   4  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   5  */
   6
   7 #include <common.h>
   8 #include <console.h>
   9 #include <debug_uart.h>
  10 #include <dm.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(SILENT_CONSOLE_UPDATE_ON_SET)
  71         if (flags & H_INTERACTIVE)
  72                 return 0;
  73 #endif
  74 #if !CONFIG_IS_ENABLED(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 /**
 150  * console_dev_is_serial() - Check if a stdio device is a serial device
 151  *
 152  * @sdev: Device to check
 153  * @return true if this device is in the serial uclass (or for pre-driver-model,
 154  * whether it is called "serial".
 155  */
 156 static bool console_dev_is_serial(struct stdio_dev *sdev)
 157 {
 158         bool is_serial;
 159
 160 #ifdef CONFIG_DM_SERIAL
 161         if (sdev->flags & DEV_FLAGS_DM) {
 162                 struct udevice *dev = sdev->priv;
 163
 164                 is_serial = device_get_uclass_id(dev) == UCLASS_SERIAL;
 165         } else
 166 #endif
 167         is_serial = !strcmp(sdev->name, "serial");
 168
 169         return is_serial;
 170 }
 171
 172 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 173 /** Console I/O multiplexing *******************************************/
 174
 175 static struct stdio_dev *tstcdev;
 176 struct stdio_dev **console_devices[MAX_FILES];
 177 int cd_count[MAX_FILES];
 178
 179 /*
 180  * This depends on tstc() always being called before getc().
 181  * This is guaranteed to be true because this routine is called
 182  * only from fgetc() which assures it.
 183  * No attempt is made to demultiplex multiple input sources.
 184  */
 185 static int console_getc(int file)
 186 {
 187         unsigned char ret;
 188
 189         /* This is never called with testcdev == NULL */
 190         ret = tstcdev->getc(tstcdev);
 191         tstcdev = NULL;
 192         return ret;
 193 }
 194
 195 static int console_tstc(int file)
 196 {
 197         int i, ret;
 198         struct stdio_dev *dev;
 199
 200         disable_ctrlc(1);
 201         for (i = 0; i < cd_count[file]; i++) {
 202                 dev = console_devices[file][i];
 203                 if (dev->tstc != NULL) {
 204                         ret = dev->tstc(dev);
 205                         if (ret > 0) {
 206                                 tstcdev = dev;
 207                                 disable_ctrlc(0);
 208                                 return ret;
 209                         }
 210                 }
 211         }
 212         disable_ctrlc(0);
 213
 214         return 0;
 215 }
 216
 217 static void console_putc(int file, const char c)
 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->putc != NULL)
 225                         dev->putc(dev, c);
 226         }
 227 }
 228
 229 static void console_puts_noserial(int file, const char *s)
 230 {
 231         int i;
 232         struct stdio_dev *dev;
 233
 234         for (i = 0; i < cd_count[file]; i++) {
 235                 dev = console_devices[file][i];
 236                 if (dev->puts != NULL && !console_dev_is_serial(dev))
 237                         dev->puts(dev, s);
 238         }
 239 }
 240
 241 static void console_puts(int file, const char *s)
 242 {
 243         int i;
 244         struct stdio_dev *dev;
 245
 246         for (i = 0; i < cd_count[file]; i++) {
 247                 dev = console_devices[file][i];
 248                 if (dev->puts != NULL)
 249                         dev->puts(dev, s);
 250         }
 251 }
 252
 253 static inline void console_doenv(int file, struct stdio_dev *dev)
 254 {
 255         iomux_doenv(file, dev->name);
 256 }
 257 #else
 258 static inline int console_getc(int file)
 259 {
 260         return stdio_devices[file]->getc(stdio_devices[file]);
 261 }
 262
 263 static inline int console_tstc(int file)
 264 {
 265         return stdio_devices[file]->tstc(stdio_devices[file]);
 266 }
 267
 268 static inline void console_putc(int file, const char c)
 269 {
 270         stdio_devices[file]->putc(stdio_devices[file], c);
 271 }
 272
 273 static inline void console_puts_noserial(int file, const char *s)
 274 {
 275         if (!console_dev_is_serial(stdio_devices[file]))
 276                 stdio_devices[file]->puts(stdio_devices[file], s);
 277 }
 278
 279 static inline void console_puts(int file, const char *s)
 280 {
 281         stdio_devices[file]->puts(stdio_devices[file], s);
 282 }
 283
 284 static inline void console_doenv(int file, struct stdio_dev *dev)
 285 {
 286         console_setfile(file, dev);
 287 }
 288 #endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
 289
 290 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 291
 292 int serial_printf(const char *fmt, ...)
 293 {
 294         va_list args;
 295         uint i;
 296         char printbuffer[CONFIG_SYS_PBSIZE];
 297
 298         va_start(args, fmt);
 299
 300         /* For this to work, printbuffer must be larger than
 301          * anything we ever want to print.
 302          */
 303         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 304         va_end(args);
 305
 306         serial_puts(printbuffer);
 307         return i;
 308 }
 309
 310 int fgetc(int file)
 311 {
 312         if (file < MAX_FILES) {
 313 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 314                 /*
 315                  * Effectively poll for input wherever it may be available.
 316                  */
 317                 for (;;) {
 318                         WATCHDOG_RESET();
 319                         /*
 320                          * Upper layer may have already called tstc() so
 321                          * check for that first.
 322                          */
 323                         if (tstcdev != NULL)
 324                                 return console_getc(file);
 325                         console_tstc(file);
 326 #ifdef CONFIG_WATCHDOG
 327                         /*
 328                          * If the watchdog must be rate-limited then it should
 329                          * already be handled in board-specific code.
 330                          */
 331                          udelay(1);
 332 #endif
 333                 }
 334 #else
 335                 return console_getc(file);
 336 #endif
 337         }
 338
 339         return -1;
 340 }
 341
 342 int ftstc(int file)
 343 {
 344         if (file < MAX_FILES)
 345                 return console_tstc(file);
 346
 347         return -1;
 348 }
 349
 350 void fputc(int file, const char c)
 351 {
 352         if (file < MAX_FILES)
 353                 console_putc(file, c);
 354 }
 355
 356 void fputs(int file, const char *s)
 357 {
 358         if (file < MAX_FILES)
 359                 console_puts(file, s);
 360 }
 361
 362 int fprintf(int file, const char *fmt, ...)
 363 {
 364         va_list args;
 365         uint i;
 366         char printbuffer[CONFIG_SYS_PBSIZE];
 367
 368         va_start(args, fmt);
 369
 370         /* For this to work, printbuffer must be larger than
 371          * anything we ever want to print.
 372          */
 373         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 374         va_end(args);
 375
 376         /* Send to desired file */
 377         fputs(file, printbuffer);
 378         return i;
 379 }
 380
 381 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 382
 383 int getc(void)
 384 {
 385 #ifdef CONFIG_DISABLE_CONSOLE
 386         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 387                 return 0;
 388 #endif
 389
 390         if (!gd->have_console)
 391                 return 0;
 392
 393 #ifdef CONFIG_CONSOLE_RECORD
 394         if (gd->console_in.start) {
 395                 int ch;
 396
 397                 ch = membuff_getbyte(&gd->console_in);
 398                 if (ch != -1)
 399                         return 1;
 400         }
 401 #endif
 402         if (gd->flags & GD_FLG_DEVINIT) {
 403                 /* Get from the standard input */
 404                 return fgetc(stdin);
 405         }
 406
 407         /* Send directly to the handler */
 408         return serial_getc();
 409 }
 410
 411 int tstc(void)
 412 {
 413 #ifdef CONFIG_DISABLE_CONSOLE
 414         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 415                 return 0;
 416 #endif
 417
 418         if (!gd->have_console)
 419                 return 0;
 420 #ifdef CONFIG_CONSOLE_RECORD
 421         if (gd->console_in.start) {
 422                 if (membuff_peekbyte(&gd->console_in) != -1)
 423                         return 1;
 424         }
 425 #endif
 426         if (gd->flags & GD_FLG_DEVINIT) {
 427                 /* Test the standard input */
 428                 return ftstc(stdin);
 429         }
 430
 431         /* Send directly to the handler */
 432         return serial_tstc();
 433 }
 434
 435 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 436 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 437
 438 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 439 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 440
 441 static void pre_console_putc(const char c)
 442 {
 443         char *buffer;
 444
 445         buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 446
 447         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 448
 449         unmap_sysmem(buffer);
 450 }
 451
 452 static void pre_console_puts(const char *s)
 453 {
 454         while (*s)
 455                 pre_console_putc(*s++);
 456 }
 457
 458 static void print_pre_console_buffer(int flushpoint)
 459 {
 460         unsigned long in = 0, out = 0;
 461         char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 462         char *buf_in;
 463
 464         buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 465         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 466                 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 467
 468         while (in < gd->precon_buf_idx)
 469                 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 470         unmap_sysmem(buf_in);
 471
 472         buf_out[out] = 0;
 473
 474         switch (flushpoint) {
 475         case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 476                 puts(buf_out);
 477                 break;
 478         case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 479                 console_puts_noserial(stdout, buf_out);
 480                 break;
 481         }
 482 }
 483 #else
 484 static inline void pre_console_putc(const char c) {}
 485 static inline void pre_console_puts(const char *s) {}
 486 static inline void print_pre_console_buffer(int flushpoint) {}
 487 #endif
 488
 489 void putc(const char c)
 490 {
 491 #ifdef CONFIG_SANDBOX
 492         /* sandbox can send characters to stdout before it has a console */
 493         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 494                 os_putc(c);
 495                 return;
 496         }
 497 #endif
 498 #ifdef CONFIG_DEBUG_UART
 499         /* if we don't have a console yet, use the debug UART */
 500         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 501                 printch(c);
 502                 return;
 503         }
 504 #endif
 505 #ifdef CONFIG_CONSOLE_RECORD
 506         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 507                 membuff_putbyte(&gd->console_out, c);
 508 #endif
 509 #ifdef CONFIG_SILENT_CONSOLE
 510         if (gd->flags & GD_FLG_SILENT)
 511                 return;
 512 #endif
 513
 514 #ifdef CONFIG_DISABLE_CONSOLE
 515         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 516                 return;
 517 #endif
 518
 519         if (!gd->have_console)
 520                 return pre_console_putc(c);
 521
 522         if (gd->flags & GD_FLG_DEVINIT) {
 523                 /* Send to the standard output */
 524                 fputc(stdout, c);
 525         } else {
 526                 /* Send directly to the handler */
 527                 pre_console_putc(c);
 528                 serial_putc(c);
 529         }
 530 }
 531
 532 void puts(const char *s)
 533 {
 534 #ifdef CONFIG_DEBUG_UART
 535         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 536                 while (*s) {
 537                         int ch = *s++;
 538
 539                         printch(ch);
 540                 }
 541                 return;
 542         }
 543 #endif
 544 #ifdef CONFIG_CONSOLE_RECORD
 545         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 546                 membuff_put(&gd->console_out, s, strlen(s));
 547 #endif
 548 #ifdef CONFIG_SILENT_CONSOLE
 549         if (gd->flags & GD_FLG_SILENT)
 550                 return;
 551 #endif
 552
 553 #ifdef CONFIG_DISABLE_CONSOLE
 554         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 555                 return;
 556 #endif
 557
 558         if (!gd->have_console)
 559                 return pre_console_puts(s);
 560
 561         if (gd->flags & GD_FLG_DEVINIT) {
 562                 /* Send to the standard output */
 563                 fputs(stdout, s);
 564         } else {
 565                 /* Send directly to the handler */
 566                 pre_console_puts(s);
 567                 serial_puts(s);
 568         }
 569 }
 570
 571 #ifdef CONFIG_CONSOLE_RECORD
 572 int console_record_init(void)
 573 {
 574         int ret;
 575
 576         ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
 577         if (ret)
 578                 return ret;
 579         ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
 580
 581         return ret;
 582 }
 583
 584 void console_record_reset(void)
 585 {
 586         membuff_purge(&gd->console_out);
 587         membuff_purge(&gd->console_in);
 588 }
 589
 590 void console_record_reset_enable(void)
 591 {
 592         console_record_reset();
 593         gd->flags |= GD_FLG_RECORD;
 594 }
 595 #endif
 596
 597 /* test if ctrl-c was pressed */
 598 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 599 static int ctrlc_was_pressed = 0;
 600 int ctrlc(void)
 601 {
 602 #ifndef CONFIG_SANDBOX
 603         if (!ctrlc_disabled && gd->have_console) {
 604                 if (tstc()) {
 605                         switch (getc()) {
 606                         case 0x03:              /* ^C - Control C */
 607                                 ctrlc_was_pressed = 1;
 608                                 return 1;
 609                         default:
 610                                 break;
 611                         }
 612                 }
 613         }
 614 #endif
 615
 616         return 0;
 617 }
 618 /* Reads user's confirmation.
 619    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 620 */
 621 int confirm_yesno(void)
 622 {
 623         int i;
 624         char str_input[5];
 625
 626         /* Flush input */
 627         while (tstc())
 628                 getc();
 629         i = 0;
 630         while (i < sizeof(str_input)) {
 631                 str_input[i] = getc();
 632                 putc(str_input[i]);
 633                 if (str_input[i] == '\r')
 634                         break;
 635                 i++;
 636         }
 637         putc('\n');
 638         if (strncmp(str_input, "y\r", 2) == 0 ||
 639             strncmp(str_input, "Y\r", 2) == 0 ||
 640             strncmp(str_input, "yes\r", 4) == 0 ||
 641             strncmp(str_input, "YES\r", 4) == 0)
 642                 return 1;
 643         return 0;
 644 }
 645 /* pass 1 to disable ctrlc() checking, 0 to enable.
 646  * returns previous state
 647  */
 648 int disable_ctrlc(int disable)
 649 {
 650         int prev = ctrlc_disabled;      /* save previous state */
 651
 652         ctrlc_disabled = disable;
 653         return prev;
 654 }
 655
 656 int had_ctrlc (void)
 657 {
 658         return ctrlc_was_pressed;
 659 }
 660
 661 void clear_ctrlc(void)
 662 {
 663         ctrlc_was_pressed = 0;
 664 }
 665
 666 /** U-Boot INIT FUNCTIONS *************************************************/
 667
 668 struct stdio_dev *search_device(int flags, const char *name)
 669 {
 670         struct stdio_dev *dev;
 671
 672         dev = stdio_get_by_name(name);
 673 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 674         if (!dev && !strcmp(name, "lcd"))
 675                 dev = stdio_get_by_name("vidconsole");
 676 #endif
 677
 678         if (dev && (dev->flags & flags))
 679                 return dev;
 680
 681         return NULL;
 682 }
 683
 684 int console_assign(int file, const char *devname)
 685 {
 686         int flag;
 687         struct stdio_dev *dev;
 688
 689         /* Check for valid file */
 690         switch (file) {
 691         case stdin:
 692                 flag = DEV_FLAGS_INPUT;
 693                 break;
 694         case stdout:
 695         case stderr:
 696                 flag = DEV_FLAGS_OUTPUT;
 697                 break;
 698         default:
 699                 return -1;
 700         }
 701
 702         /* Check for valid device name */
 703
 704         dev = search_device(flag, devname);
 705
 706         if (dev)
 707                 return console_setfile(file, dev);
 708
 709         return -1;
 710 }
 711
 712 static void console_update_silent(void)
 713 {
 714 #ifdef CONFIG_SILENT_CONSOLE
 715         if (env_get("silent") != NULL)
 716                 gd->flags |= GD_FLG_SILENT;
 717         else
 718                 gd->flags &= ~GD_FLG_SILENT;
 719 #endif
 720 }
 721
 722 int console_announce_r(void)
 723 {
 724 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 725         char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
 726
 727         display_options_get_banner(false, buf, sizeof(buf));
 728
 729         console_puts_noserial(stdout, buf);
 730 #endif
 731
 732         return 0;
 733 }
 734
 735 /* Called before relocation - use serial functions */
 736 int console_init_f(void)
 737 {
 738         gd->have_console = 1;
 739
 740         console_update_silent();
 741
 742         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 743
 744         return 0;
 745 }
 746
 747 void stdio_print_current_devices(void)
 748 {
 749         /* Print information */
 750         puts("In:    ");
 751         if (stdio_devices[stdin] == NULL) {
 752                 puts("No input devices available!\n");
 753         } else {
 754                 printf ("%s\n", stdio_devices[stdin]->name);
 755         }
 756
 757         puts("Out:   ");
 758         if (stdio_devices[stdout] == NULL) {
 759                 puts("No output devices available!\n");
 760         } else {
 761                 printf ("%s\n", stdio_devices[stdout]->name);
 762         }
 763
 764         puts("Err:   ");
 765         if (stdio_devices[stderr] == NULL) {
 766                 puts("No error devices available!\n");
 767         } else {
 768                 printf ("%s\n", stdio_devices[stderr]->name);
 769         }
 770 }
 771
 772 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 773 /* Called after the relocation - use desired console functions */
 774 int console_init_r(void)
 775 {
 776         char *stdinname, *stdoutname, *stderrname;
 777         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 778 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 779         int i;
 780 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 781 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 782         int iomux_err = 0;
 783 #endif
 784
 785         /* set default handlers at first */
 786         gd->jt->getc  = serial_getc;
 787         gd->jt->tstc  = serial_tstc;
 788         gd->jt->putc  = serial_putc;
 789         gd->jt->puts  = serial_puts;
 790         gd->jt->printf = serial_printf;
 791
 792         /* stdin stdout and stderr are in environment */
 793         /* scan for it */
 794         stdinname  = env_get("stdin");
 795         stdoutname = env_get("stdout");
 796         stderrname = env_get("stderr");
 797
 798         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 799                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 800                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 801                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 802 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 803                 iomux_err = iomux_doenv(stdin, stdinname);
 804                 iomux_err += iomux_doenv(stdout, stdoutname);
 805                 iomux_err += iomux_doenv(stderr, stderrname);
 806                 if (!iomux_err)
 807                         /* Successful, so skip all the code below. */
 808                         goto done;
 809 #endif
 810         }
 811         /* if the devices are overwritten or not found, use default device */
 812         if (inputdev == NULL) {
 813                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 814         }
 815         if (outputdev == NULL) {
 816                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 817         }
 818         if (errdev == NULL) {
 819                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 820         }
 821         /* Initializes output console first */
 822         if (outputdev != NULL) {
 823                 /* need to set a console if not done above. */
 824                 console_doenv(stdout, outputdev);
 825         }
 826         if (errdev != NULL) {
 827                 /* need to set a console if not done above. */
 828                 console_doenv(stderr, errdev);
 829         }
 830         if (inputdev != NULL) {
 831                 /* need to set a console if not done above. */
 832                 console_doenv(stdin, inputdev);
 833         }
 834
 835 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 836 done:
 837 #endif
 838
 839 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 840         stdio_print_current_devices();
 841 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 842 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 843         if (strstr(stdoutname, "lcd"))
 844                 printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
 845 #endif
 846
 847 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 848         /* set the environment variables (will overwrite previous env settings) */
 849         for (i = 0; i < MAX_FILES; i++) {
 850                 env_set(stdio_names[i], stdio_devices[i]->name);
 851         }
 852 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 853
 854         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 855
 856 #if 0
 857         /* If nothing usable installed, use only the initial console */
 858         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 859                 return 0;
 860 #endif
 861         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 862         return 0;
 863 }
 864
 865 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 866
 867 /* Called after the relocation - use desired console functions */
 868 int console_init_r(void)
 869 {
 870         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 871         int i;
 872         struct list_head *list = stdio_get_list();
 873         struct list_head *pos;
 874         struct stdio_dev *dev;
 875
 876         console_update_silent();
 877
 878 #ifdef CONFIG_SPLASH_SCREEN
 879         /*
 880          * suppress all output if splash screen is enabled and we have
 881          * a bmp to display. We redirect the output from frame buffer
 882          * console to serial console in this case or suppress it if
 883          * "silent" mode was requested.
 884          */
 885         if (env_get("splashimage") != NULL) {
 886                 if (!(gd->flags & GD_FLG_SILENT))
 887                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 888         }
 889 #endif
 890
 891         /* Scan devices looking for input and output devices */
 892         list_for_each(pos, list) {
 893                 dev = list_entry(pos, struct stdio_dev, list);
 894
 895                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 896                         inputdev = dev;
 897                 }
 898                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 899                         outputdev = dev;
 900                 }
 901                 if(inputdev && outputdev)
 902                         break;
 903         }
 904
 905         /* Initializes output console first */
 906         if (outputdev != NULL) {
 907                 console_setfile(stdout, outputdev);
 908                 console_setfile(stderr, outputdev);
 909 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 910                 console_devices[stdout][0] = outputdev;
 911                 console_devices[stderr][0] = outputdev;
 912 #endif
 913         }
 914
 915         /* Initializes input console */
 916         if (inputdev != NULL) {
 917                 console_setfile(stdin, inputdev);
 918 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 919                 console_devices[stdin][0] = inputdev;
 920 #endif
 921         }
 922
 923 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 924         stdio_print_current_devices();
 925 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 926
 927         /* Setting environment variables */
 928         for (i = 0; i < MAX_FILES; i++) {
 929                 env_set(stdio_names[i], stdio_devices[i]->name);
 930         }
 931
 932         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 933
 934 #if 0
 935         /* If nothing usable installed, use only the initial console */
 936         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 937                 return 0;
 938 #endif
 939         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 940         return 0;
 941 }
 942
 943 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */