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         int prev;
 200
 201         prev = disable_ctrlc(1);
 202         for (i = 0; i < cd_count[file]; i++) {
 203                 dev = console_devices[file][i];
 204                 if (dev->tstc != NULL) {
 205                         ret = dev->tstc(dev);
 206                         if (ret > 0) {
 207                                 tstcdev = dev;
 208                                 disable_ctrlc(prev);
 209                                 return ret;
 210                         }
 211                 }
 212         }
 213         disable_ctrlc(prev);
 214
 215         return 0;
 216 }
 217
 218 static void console_putc(int file, const char c)
 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->putc != NULL)
 226                         dev->putc(dev, c);
 227         }
 228 }
 229
 230 static void console_puts_noserial(int file, const char *s)
 231 {
 232         int i;
 233         struct stdio_dev *dev;
 234
 235         for (i = 0; i < cd_count[file]; i++) {
 236                 dev = console_devices[file][i];
 237                 if (dev->puts != NULL && !console_dev_is_serial(dev))
 238                         dev->puts(dev, s);
 239         }
 240 }
 241
 242 static void console_puts(int file, const char *s)
 243 {
 244         int i;
 245         struct stdio_dev *dev;
 246
 247         for (i = 0; i < cd_count[file]; i++) {
 248                 dev = console_devices[file][i];
 249                 if (dev->puts != NULL)
 250                         dev->puts(dev, s);
 251         }
 252 }
 253
 254 static inline void console_doenv(int file, struct stdio_dev *dev)
 255 {
 256         iomux_doenv(file, dev->name);
 257 }
 258 #else
 259 static inline int console_getc(int file)
 260 {
 261         return stdio_devices[file]->getc(stdio_devices[file]);
 262 }
 263
 264 static inline int console_tstc(int file)
 265 {
 266         return stdio_devices[file]->tstc(stdio_devices[file]);
 267 }
 268
 269 static inline void console_putc(int file, const char c)
 270 {
 271         stdio_devices[file]->putc(stdio_devices[file], c);
 272 }
 273
 274 static inline void console_puts_noserial(int file, const char *s)
 275 {
 276         if (!console_dev_is_serial(stdio_devices[file]))
 277                 stdio_devices[file]->puts(stdio_devices[file], s);
 278 }
 279
 280 static inline void console_puts(int file, const char *s)
 281 {
 282         stdio_devices[file]->puts(stdio_devices[file], s);
 283 }
 284
 285 static inline void console_doenv(int file, struct stdio_dev *dev)
 286 {
 287         console_setfile(file, dev);
 288 }
 289 #endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
 290
 291 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 292
 293 int serial_printf(const char *fmt, ...)
 294 {
 295         va_list args;
 296         uint i;
 297         char printbuffer[CONFIG_SYS_PBSIZE];
 298
 299         va_start(args, fmt);
 300
 301         /* For this to work, printbuffer must be larger than
 302          * anything we ever want to print.
 303          */
 304         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 305         va_end(args);
 306
 307         serial_puts(printbuffer);
 308         return i;
 309 }
 310
 311 int fgetc(int file)
 312 {
 313         if (file < MAX_FILES) {
 314                 /*
 315                  * Effectively poll for input wherever it may be available.
 316                  */
 317                 for (;;) {
 318                         WATCHDOG_RESET();
 319 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 320                         /*
 321                          * Upper layer may have already called tstc() so
 322                          * check for that first.
 323                          */
 324                         if (tstcdev != NULL)
 325                                 return console_getc(file);
 326                         console_tstc(file);
 327 #else
 328                         if (console_tstc(file))
 329                                 return console_getc(file);
 330 #endif
 331 #ifdef CONFIG_WATCHDOG
 332                         /*
 333                          * If the watchdog must be rate-limited then it should
 334                          * already be handled in board-specific code.
 335                          */
 336                          udelay(1);
 337 #endif
 338                 }
 339         }
 340
 341         return -1;
 342 }
 343
 344 int ftstc(int file)
 345 {
 346         if (file < MAX_FILES)
 347                 return console_tstc(file);
 348
 349         return -1;
 350 }
 351
 352 void fputc(int file, const char c)
 353 {
 354         if (file < MAX_FILES)
 355                 console_putc(file, c);
 356 }
 357
 358 void fputs(int file, const char *s)
 359 {
 360         if (file < MAX_FILES)
 361                 console_puts(file, s);
 362 }
 363
 364 int fprintf(int file, const char *fmt, ...)
 365 {
 366         va_list args;
 367         uint i;
 368         char printbuffer[CONFIG_SYS_PBSIZE];
 369
 370         va_start(args, fmt);
 371
 372         /* For this to work, printbuffer must be larger than
 373          * anything we ever want to print.
 374          */
 375         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 376         va_end(args);
 377
 378         /* Send to desired file */
 379         fputs(file, printbuffer);
 380         return i;
 381 }
 382
 383 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 384
 385 int getc(void)
 386 {
 387 #ifdef CONFIG_DISABLE_CONSOLE
 388         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 389                 return 0;
 390 #endif
 391
 392         if (!gd->have_console)
 393                 return 0;
 394
 395 #ifdef CONFIG_CONSOLE_RECORD
 396         if (gd->console_in.start) {
 397                 int ch;
 398
 399                 ch = membuff_getbyte(&gd->console_in);
 400                 if (ch != -1)
 401                         return 1;
 402         }
 403 #endif
 404         if (gd->flags & GD_FLG_DEVINIT) {
 405                 /* Get from the standard input */
 406                 return fgetc(stdin);
 407         }
 408
 409         /* Send directly to the handler */
 410         return serial_getc();
 411 }
 412
 413 int tstc(void)
 414 {
 415 #ifdef CONFIG_DISABLE_CONSOLE
 416         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 417                 return 0;
 418 #endif
 419
 420         if (!gd->have_console)
 421                 return 0;
 422 #ifdef CONFIG_CONSOLE_RECORD
 423         if (gd->console_in.start) {
 424                 if (membuff_peekbyte(&gd->console_in) != -1)
 425                         return 1;
 426         }
 427 #endif
 428         if (gd->flags & GD_FLG_DEVINIT) {
 429                 /* Test the standard input */
 430                 return ftstc(stdin);
 431         }
 432
 433         /* Send directly to the handler */
 434         return serial_tstc();
 435 }
 436
 437 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 438 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 439
 440 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 441 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 442
 443 static void pre_console_putc(const char c)
 444 {
 445         char *buffer;
 446
 447         buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 448
 449         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 450
 451         unmap_sysmem(buffer);
 452 }
 453
 454 static void pre_console_puts(const char *s)
 455 {
 456         while (*s)
 457                 pre_console_putc(*s++);
 458 }
 459
 460 static void print_pre_console_buffer(int flushpoint)
 461 {
 462         unsigned long in = 0, out = 0;
 463         char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 464         char *buf_in;
 465
 466         buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 467         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 468                 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 469
 470         while (in < gd->precon_buf_idx)
 471                 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 472         unmap_sysmem(buf_in);
 473
 474         buf_out[out] = 0;
 475
 476         switch (flushpoint) {
 477         case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 478                 puts(buf_out);
 479                 break;
 480         case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 481                 console_puts_noserial(stdout, buf_out);
 482                 break;
 483         }
 484 }
 485 #else
 486 static inline void pre_console_putc(const char c) {}
 487 static inline void pre_console_puts(const char *s) {}
 488 static inline void print_pre_console_buffer(int flushpoint) {}
 489 #endif
 490
 491 void putc(const char c)
 492 {
 493 #ifdef CONFIG_SANDBOX
 494         /* sandbox can send characters to stdout before it has a console */
 495         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 496                 os_putc(c);
 497                 return;
 498         }
 499 #endif
 500 #ifdef CONFIG_DEBUG_UART
 501         /* if we don't have a console yet, use the debug UART */
 502         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 503                 printch(c);
 504                 return;
 505         }
 506 #endif
 507         if (!gd)
 508                 return;
 509 #ifdef CONFIG_CONSOLE_RECORD
 510         if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 511                 membuff_putbyte(&gd->console_out, c);
 512 #endif
 513 #ifdef CONFIG_SILENT_CONSOLE
 514         if (gd->flags & GD_FLG_SILENT)
 515                 return;
 516 #endif
 517
 518 #ifdef CONFIG_DISABLE_CONSOLE
 519         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 520                 return;
 521 #endif
 522
 523         if (!gd->have_console)
 524                 return pre_console_putc(c);
 525
 526         if (gd->flags & GD_FLG_DEVINIT) {
 527                 /* Send to the standard output */
 528                 fputc(stdout, c);
 529         } else {
 530                 /* Send directly to the handler */
 531                 pre_console_putc(c);
 532                 serial_putc(c);
 533         }
 534 }
 535
 536 void puts(const char *s)
 537 {
 538 #ifdef CONFIG_DEBUG_UART
 539         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 540                 while (*s) {
 541                         int ch = *s++;
 542
 543                         printch(ch);
 544                 }
 545                 return;
 546         }
 547 #endif
 548         if (!gd)
 549                 return;
 550 #ifdef CONFIG_CONSOLE_RECORD
 551         if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 552                 membuff_put(&gd->console_out, s, strlen(s));
 553 #endif
 554 #ifdef CONFIG_SILENT_CONSOLE
 555         if (gd->flags & GD_FLG_SILENT)
 556                 return;
 557 #endif
 558
 559 #ifdef CONFIG_DISABLE_CONSOLE
 560         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 561                 return;
 562 #endif
 563
 564         if (!gd->have_console)
 565                 return pre_console_puts(s);
 566
 567         if (gd->flags & GD_FLG_DEVINIT) {
 568                 /* Send to the standard output */
 569                 fputs(stdout, s);
 570         } else {
 571                 /* Send directly to the handler */
 572                 pre_console_puts(s);
 573                 serial_puts(s);
 574         }
 575 }
 576
 577 #ifdef CONFIG_CONSOLE_RECORD
 578 int console_record_init(void)
 579 {
 580         int ret;
 581
 582         ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
 583         if (ret)
 584                 return ret;
 585         ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
 586
 587         return ret;
 588 }
 589
 590 void console_record_reset(void)
 591 {
 592         membuff_purge(&gd->console_out);
 593         membuff_purge(&gd->console_in);
 594 }
 595
 596 void console_record_reset_enable(void)
 597 {
 598         console_record_reset();
 599         gd->flags |= GD_FLG_RECORD;
 600 }
 601 #endif
 602
 603 /* test if ctrl-c was pressed */
 604 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 605 static int ctrlc_was_pressed = 0;
 606 int ctrlc(void)
 607 {
 608         if (!ctrlc_disabled && gd->have_console) {
 609                 if (tstc()) {
 610                         switch (getc()) {
 611                         case 0x03:              /* ^C - Control C */
 612                                 ctrlc_was_pressed = 1;
 613                                 return 1;
 614                         default:
 615                                 break;
 616                         }
 617                 }
 618         }
 619
 620         return 0;
 621 }
 622 /* Reads user's confirmation.
 623    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 624 */
 625 int confirm_yesno(void)
 626 {
 627         int i;
 628         char str_input[5];
 629
 630         /* Flush input */
 631         while (tstc())
 632                 getc();
 633         i = 0;
 634         while (i < sizeof(str_input)) {
 635                 str_input[i] = getc();
 636                 putc(str_input[i]);
 637                 if (str_input[i] == '\r')
 638                         break;
 639                 i++;
 640         }
 641         putc('\n');
 642         if (strncmp(str_input, "y\r", 2) == 0 ||
 643             strncmp(str_input, "Y\r", 2) == 0 ||
 644             strncmp(str_input, "yes\r", 4) == 0 ||
 645             strncmp(str_input, "YES\r", 4) == 0)
 646                 return 1;
 647         return 0;
 648 }
 649 /* pass 1 to disable ctrlc() checking, 0 to enable.
 650  * returns previous state
 651  */
 652 int disable_ctrlc(int disable)
 653 {
 654         int prev = ctrlc_disabled;      /* save previous state */
 655
 656         ctrlc_disabled = disable;
 657         return prev;
 658 }
 659
 660 int had_ctrlc (void)
 661 {
 662         return ctrlc_was_pressed;
 663 }
 664
 665 void clear_ctrlc(void)
 666 {
 667         ctrlc_was_pressed = 0;
 668 }
 669
 670 /** U-Boot INIT FUNCTIONS *************************************************/
 671
 672 struct stdio_dev *search_device(int flags, const char *name)
 673 {
 674         struct stdio_dev *dev;
 675
 676         dev = stdio_get_by_name(name);
 677 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 678         if (!dev && !strcmp(name, "lcd"))
 679                 dev = stdio_get_by_name("vidconsole");
 680 #endif
 681
 682         if (dev && (dev->flags & flags))
 683                 return dev;
 684
 685         return NULL;
 686 }
 687
 688 int console_assign(int file, const char *devname)
 689 {
 690         int flag;
 691         struct stdio_dev *dev;
 692
 693         /* Check for valid file */
 694         switch (file) {
 695         case stdin:
 696                 flag = DEV_FLAGS_INPUT;
 697                 break;
 698         case stdout:
 699         case stderr:
 700                 flag = DEV_FLAGS_OUTPUT;
 701                 break;
 702         default:
 703                 return -1;
 704         }
 705
 706         /* Check for valid device name */
 707
 708         dev = search_device(flag, devname);
 709
 710         if (dev)
 711                 return console_setfile(file, dev);
 712
 713         return -1;
 714 }
 715
 716 static void console_update_silent(void)
 717 {
 718 #ifdef CONFIG_SILENT_CONSOLE
 719         if (env_get("silent") != NULL)
 720                 gd->flags |= GD_FLG_SILENT;
 721         else
 722                 gd->flags &= ~GD_FLG_SILENT;
 723 #endif
 724 }
 725
 726 int console_announce_r(void)
 727 {
 728 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 729         char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
 730
 731         display_options_get_banner(false, buf, sizeof(buf));
 732
 733         console_puts_noserial(stdout, buf);
 734 #endif
 735
 736         return 0;
 737 }
 738
 739 /* Called before relocation - use serial functions */
 740 int console_init_f(void)
 741 {
 742         gd->have_console = 1;
 743
 744         console_update_silent();
 745
 746         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 747
 748         return 0;
 749 }
 750
 751 void stdio_print_current_devices(void)
 752 {
 753         /* Print information */
 754         puts("In:    ");
 755         if (stdio_devices[stdin] == NULL) {
 756                 puts("No input devices available!\n");
 757         } else {
 758                 printf ("%s\n", stdio_devices[stdin]->name);
 759         }
 760
 761         puts("Out:   ");
 762         if (stdio_devices[stdout] == NULL) {
 763                 puts("No output devices available!\n");
 764         } else {
 765                 printf ("%s\n", stdio_devices[stdout]->name);
 766         }
 767
 768         puts("Err:   ");
 769         if (stdio_devices[stderr] == NULL) {
 770                 puts("No error devices available!\n");
 771         } else {
 772                 printf ("%s\n", stdio_devices[stderr]->name);
 773         }
 774 }
 775
 776 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 777 /* Called after the relocation - use desired console functions */
 778 int console_init_r(void)
 779 {
 780         char *stdinname, *stdoutname, *stderrname;
 781         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 782 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 783         int i;
 784 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 785 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 786         int iomux_err = 0;
 787 #endif
 788
 789         /* set default handlers at first */
 790         gd->jt->getc  = serial_getc;
 791         gd->jt->tstc  = serial_tstc;
 792         gd->jt->putc  = serial_putc;
 793         gd->jt->puts  = serial_puts;
 794         gd->jt->printf = serial_printf;
 795
 796         /* stdin stdout and stderr are in environment */
 797         /* scan for it */
 798         stdinname  = env_get("stdin");
 799         stdoutname = env_get("stdout");
 800         stderrname = env_get("stderr");
 801
 802         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 803                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 804                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 805                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 806 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 807                 iomux_err = iomux_doenv(stdin, stdinname);
 808                 iomux_err += iomux_doenv(stdout, stdoutname);
 809                 iomux_err += iomux_doenv(stderr, stderrname);
 810                 if (!iomux_err)
 811                         /* Successful, so skip all the code below. */
 812                         goto done;
 813 #endif
 814         }
 815         /* if the devices are overwritten or not found, use default device */
 816         if (inputdev == NULL) {
 817                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 818         }
 819         if (outputdev == NULL) {
 820                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 821         }
 822         if (errdev == NULL) {
 823                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 824         }
 825         /* Initializes output console first */
 826         if (outputdev != NULL) {
 827                 /* need to set a console if not done above. */
 828                 console_doenv(stdout, outputdev);
 829         }
 830         if (errdev != NULL) {
 831                 /* need to set a console if not done above. */
 832                 console_doenv(stderr, errdev);
 833         }
 834         if (inputdev != NULL) {
 835                 /* need to set a console if not done above. */
 836                 console_doenv(stdin, inputdev);
 837         }
 838
 839 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 840 done:
 841 #endif
 842
 843 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 844         stdio_print_current_devices();
 845 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 846 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 847         if (strstr(stdoutname, "lcd"))
 848                 printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
 849 #endif
 850
 851 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 852         /* set the environment variables (will overwrite previous env settings) */
 853         for (i = 0; i < MAX_FILES; i++) {
 854                 env_set(stdio_names[i], stdio_devices[i]->name);
 855         }
 856 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 857
 858         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 859
 860 #if 0
 861         /* If nothing usable installed, use only the initial console */
 862         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 863                 return 0;
 864 #endif
 865         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 866         return 0;
 867 }
 868
 869 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 870
 871 /* Called after the relocation - use desired console functions */
 872 int console_init_r(void)
 873 {
 874         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 875         int i;
 876         struct list_head *list = stdio_get_list();
 877         struct list_head *pos;
 878         struct stdio_dev *dev;
 879
 880         console_update_silent();
 881
 882 #ifdef CONFIG_SPLASH_SCREEN
 883         /*
 884          * suppress all output if splash screen is enabled and we have
 885          * a bmp to display. We redirect the output from frame buffer
 886          * console to serial console in this case or suppress it if
 887          * "silent" mode was requested.
 888          */
 889         if (env_get("splashimage") != NULL) {
 890                 if (!(gd->flags & GD_FLG_SILENT))
 891                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 892         }
 893 #endif
 894
 895         /* Scan devices looking for input and output devices */
 896         list_for_each(pos, list) {
 897                 dev = list_entry(pos, struct stdio_dev, list);
 898
 899                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 900                         inputdev = dev;
 901                 }
 902                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 903                         outputdev = dev;
 904                 }
 905                 if(inputdev && outputdev)
 906                         break;
 907         }
 908
 909         /* Initializes output console first */
 910         if (outputdev != NULL) {
 911                 console_setfile(stdout, outputdev);
 912                 console_setfile(stderr, outputdev);
 913 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 914                 console_devices[stdout][0] = outputdev;
 915                 console_devices[stderr][0] = outputdev;
 916 #endif
 917         }
 918
 919         /* Initializes input console */
 920         if (inputdev != NULL) {
 921                 console_setfile(stdin, inputdev);
 922 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 923                 console_devices[stdin][0] = inputdev;
 924 #endif
 925         }
 926
 927 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 928         stdio_print_current_devices();
 929 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 930
 931         /* Setting environment variables */
 932         for (i = 0; i < MAX_FILES; i++) {
 933                 env_set(stdio_names[i], stdio_devices[i]->name);
 934         }
 935
 936         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 937
 938 #if 0
 939         /* If nothing usable installed, use only the initial console */
 940         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 941                 return 0;
 942 #endif
 943         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 944         return 0;
 945 }
 946
 947 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */