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_printdevs(int file)
 231 {
 232         iomux_printdevs(file);
 233 }
 234
 235 static inline void console_doenv(int file, struct stdio_dev *dev)
 236 {
 237         iomux_doenv(file, dev->name);
 238 }
 239 #else
 240 static inline int console_getc(int file)
 241 {
 242         return stdio_devices[file]->getc(stdio_devices[file]);
 243 }
 244
 245 static inline int console_tstc(int file)
 246 {
 247         return stdio_devices[file]->tstc(stdio_devices[file]);
 248 }
 249
 250 static inline void console_putc(int file, const char c)
 251 {
 252         stdio_devices[file]->putc(stdio_devices[file], c);
 253 }
 254
 255 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 256 static inline void console_puts_noserial(int file, const char *s)
 257 {
 258         if (strcmp(stdio_devices[file]->name, "serial") != 0)
 259                 stdio_devices[file]->puts(stdio_devices[file], s);
 260 }
 261 #endif
 262
 263 static inline void console_puts(int file, const char *s)
 264 {
 265         stdio_devices[file]->puts(stdio_devices[file], s);
 266 }
 267
 268 static inline void console_printdevs(int file)
 269 {
 270         printf("%s\n", stdio_devices[file]->name);
 271 }
 272
 273 static inline void console_doenv(int file, struct stdio_dev *dev)
 274 {
 275         console_setfile(file, dev);
 276 }
 277 #endif /* defined(CONFIG_CONSOLE_MUX) */
 278
 279 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 280
 281 int serial_printf(const char *fmt, ...)
 282 {
 283         va_list args;
 284         uint i;
 285         char printbuffer[CONFIG_SYS_PBSIZE];
 286
 287         va_start(args, fmt);
 288
 289         /* For this to work, printbuffer must be larger than
 290          * anything we ever want to print.
 291          */
 292         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 293         va_end(args);
 294
 295         serial_puts(printbuffer);
 296         return i;
 297 }
 298
 299 int fgetc(int file)
 300 {
 301         if (file < MAX_FILES) {
 302 #if defined(CONFIG_CONSOLE_MUX)
 303                 /*
 304                  * Effectively poll for input wherever it may be available.
 305                  */
 306                 for (;;) {
 307                         /*
 308                          * Upper layer may have already called tstc() so
 309                          * check for that first.
 310                          */
 311                         if (tstcdev != NULL)
 312                                 return console_getc(file);
 313                         console_tstc(file);
 314 #ifdef CONFIG_WATCHDOG
 315                         /*
 316                          * If the watchdog must be rate-limited then it should
 317                          * already be handled in board-specific code.
 318                          */
 319                          udelay(1);
 320 #endif
 321                 }
 322 #else
 323                 return console_getc(file);
 324 #endif
 325         }
 326
 327         return -1;
 328 }
 329
 330 int ftstc(int file)
 331 {
 332         if (file < MAX_FILES)
 333                 return console_tstc(file);
 334
 335         return -1;
 336 }
 337
 338 void fputc(int file, const char c)
 339 {
 340         if (file < MAX_FILES)
 341                 console_putc(file, c);
 342 }
 343
 344 void fputs(int file, const char *s)
 345 {
 346         if (file < MAX_FILES)
 347                 console_puts(file, s);
 348 }
 349
 350 int fprintf(int file, const char *fmt, ...)
 351 {
 352         va_list args;
 353         uint i;
 354         char printbuffer[CONFIG_SYS_PBSIZE];
 355
 356         va_start(args, fmt);
 357
 358         /* For this to work, printbuffer must be larger than
 359          * anything we ever want to print.
 360          */
 361         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 362         va_end(args);
 363
 364         /* Send to desired file */
 365         fputs(file, printbuffer);
 366         return i;
 367 }
 368
 369 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 370
 371 int getc(void)
 372 {
 373 #ifdef CONFIG_DISABLE_CONSOLE
 374         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 375                 return 0;
 376 #endif
 377
 378         if (!gd->have_console)
 379                 return 0;
 380
 381 #ifdef CONFIG_CONSOLE_RECORD
 382         if (gd->console_in.start) {
 383                 int ch;
 384
 385                 ch = membuff_getbyte(&gd->console_in);
 386                 if (ch != -1)
 387                         return 1;
 388         }
 389 #endif
 390         if (gd->flags & GD_FLG_DEVINIT) {
 391                 /* Get from the standard input */
 392                 return fgetc(stdin);
 393         }
 394
 395         /* Send directly to the handler */
 396         return serial_getc();
 397 }
 398
 399 int tstc(void)
 400 {
 401 #ifdef CONFIG_DISABLE_CONSOLE
 402         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 403                 return 0;
 404 #endif
 405
 406         if (!gd->have_console)
 407                 return 0;
 408 #ifdef CONFIG_CONSOLE_RECORD
 409         if (gd->console_in.start) {
 410                 if (membuff_peekbyte(&gd->console_in) != -1)
 411                         return 1;
 412         }
 413 #endif
 414         if (gd->flags & GD_FLG_DEVINIT) {
 415                 /* Test the standard input */
 416                 return ftstc(stdin);
 417         }
 418
 419         /* Send directly to the handler */
 420         return serial_tstc();
 421 }
 422
 423 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 424 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 425
 426 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 427 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 428
 429 static void pre_console_putc(const char c)
 430 {
 431         char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
 432
 433         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 434 }
 435
 436 static void pre_console_puts(const char *s)
 437 {
 438         while (*s)
 439                 pre_console_putc(*s++);
 440 }
 441
 442 static void print_pre_console_buffer(int flushpoint)
 443 {
 444         unsigned long in = 0, out = 0;
 445         char *buf_in = (char *)CONFIG_PRE_CON_BUF_ADDR;
 446         char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 447
 448         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 449                 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 450
 451         while (in < gd->precon_buf_idx)
 452                 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 453
 454         buf_out[out] = 0;
 455
 456         switch (flushpoint) {
 457         case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 458                 puts(buf_out);
 459                 break;
 460         case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 461                 console_puts_noserial(stdout, buf_out);
 462                 break;
 463         }
 464 }
 465 #else
 466 static inline void pre_console_putc(const char c) {}
 467 static inline void pre_console_puts(const char *s) {}
 468 static inline void print_pre_console_buffer(int flushpoint) {}
 469 #endif
 470
 471 void putc(const char c)
 472 {
 473 #ifdef CONFIG_SANDBOX
 474         /* sandbox can send characters to stdout before it has a console */
 475         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 476                 os_putc(c);
 477                 return;
 478         }
 479 #endif
 480 #ifdef CONFIG_DEBUG_UART
 481         /* if we don't have a console yet, use the debug UART */
 482         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 483                 printch(c);
 484                 return;
 485         }
 486 #endif
 487 #ifdef CONFIG_CONSOLE_RECORD
 488         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 489                 membuff_putbyte(&gd->console_out, c);
 490 #endif
 491 #ifdef CONFIG_SILENT_CONSOLE
 492         if (gd->flags & GD_FLG_SILENT)
 493                 return;
 494 #endif
 495
 496 #ifdef CONFIG_DISABLE_CONSOLE
 497         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 498                 return;
 499 #endif
 500
 501         if (!gd->have_console)
 502                 return pre_console_putc(c);
 503
 504         if (gd->flags & GD_FLG_DEVINIT) {
 505                 /* Send to the standard output */
 506                 fputc(stdout, c);
 507         } else {
 508                 /* Send directly to the handler */
 509                 pre_console_putc(c);
 510                 serial_putc(c);
 511         }
 512 }
 513
 514 void puts(const char *s)
 515 {
 516 #ifdef CONFIG_SANDBOX
 517         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 518                 os_puts(s);
 519                 return;
 520         }
 521 #endif
 522 #ifdef CONFIG_DEBUG_UART
 523         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 524                 while (*s) {
 525                         int ch = *s++;
 526
 527                         printch(ch);
 528                         if (ch == '\n')
 529                                 printch('\r');
 530                 }
 531                 return;
 532         }
 533 #endif
 534 #ifdef CONFIG_CONSOLE_RECORD
 535         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 536                 membuff_put(&gd->console_out, s, strlen(s));
 537 #endif
 538 #ifdef CONFIG_SILENT_CONSOLE
 539         if (gd->flags & GD_FLG_SILENT)
 540                 return;
 541 #endif
 542
 543 #ifdef CONFIG_DISABLE_CONSOLE
 544         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 545                 return;
 546 #endif
 547
 548         if (!gd->have_console)
 549                 return pre_console_puts(s);
 550
 551         if (gd->flags & GD_FLG_DEVINIT) {
 552                 /* Send to the standard output */
 553                 fputs(stdout, s);
 554         } else {
 555                 /* Send directly to the handler */
 556                 pre_console_puts(s);
 557                 serial_puts(s);
 558         }
 559 }
 560
 561 #ifdef CONFIG_CONSOLE_RECORD
 562 int console_record_init(void)
 563 {
 564         int ret;
 565
 566         ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
 567         if (ret)
 568                 return ret;
 569         ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
 570
 571         return ret;
 572 }
 573
 574 void console_record_reset(void)
 575 {
 576         membuff_purge(&gd->console_out);
 577         membuff_purge(&gd->console_in);
 578 }
 579
 580 void console_record_reset_enable(void)
 581 {
 582         console_record_reset();
 583         gd->flags |= GD_FLG_RECORD;
 584 }
 585 #endif
 586
 587 /* test if ctrl-c was pressed */
 588 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 589 static int ctrlc_was_pressed = 0;
 590 int ctrlc(void)
 591 {
 592 #ifndef CONFIG_SANDBOX
 593         if (!ctrlc_disabled && gd->have_console) {
 594                 if (tstc()) {
 595                         switch (getc()) {
 596                         case 0x03:              /* ^C - Control C */
 597                                 ctrlc_was_pressed = 1;
 598                                 return 1;
 599                         default:
 600                                 break;
 601                         }
 602                 }
 603         }
 604 #endif
 605
 606         return 0;
 607 }
 608 /* Reads user's confirmation.
 609    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 610 */
 611 int confirm_yesno(void)
 612 {
 613         int i;
 614         char str_input[5];
 615
 616         /* Flush input */
 617         while (tstc())
 618                 getc();
 619         i = 0;
 620         while (i < sizeof(str_input)) {
 621                 str_input[i] = getc();
 622                 putc(str_input[i]);
 623                 if (str_input[i] == '\r')
 624                         break;
 625                 i++;
 626         }
 627         putc('\n');
 628         if (strncmp(str_input, "y\r", 2) == 0 ||
 629             strncmp(str_input, "Y\r", 2) == 0 ||
 630             strncmp(str_input, "yes\r", 4) == 0 ||
 631             strncmp(str_input, "YES\r", 4) == 0)
 632                 return 1;
 633         return 0;
 634 }
 635 /* pass 1 to disable ctrlc() checking, 0 to enable.
 636  * returns previous state
 637  */
 638 int disable_ctrlc(int disable)
 639 {
 640         int prev = ctrlc_disabled;      /* save previous state */
 641
 642         ctrlc_disabled = disable;
 643         return prev;
 644 }
 645
 646 int had_ctrlc (void)
 647 {
 648         return ctrlc_was_pressed;
 649 }
 650
 651 void clear_ctrlc(void)
 652 {
 653         ctrlc_was_pressed = 0;
 654 }
 655
 656 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
 657 char    screen[1024];
 658 char *cursor = screen;
 659 int once = 0;
 660 inline void dbg(const char *fmt, ...)
 661 {
 662         va_list args;
 663         uint    i;
 664         char    printbuffer[CONFIG_SYS_PBSIZE];
 665
 666         if (!once) {
 667                 memset(screen, 0, sizeof(screen));
 668                 once++;
 669         }
 670
 671         va_start(args, fmt);
 672
 673         /* For this to work, printbuffer must be larger than
 674          * anything we ever want to print.
 675          */
 676         i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 677         va_end(args);
 678
 679         if ((screen + sizeof(screen) - 1 - cursor)
 680             < strlen(printbuffer) + 1) {
 681                 memset(screen, 0, sizeof(screen));
 682                 cursor = screen;
 683         }
 684         sprintf(cursor, printbuffer);
 685         cursor += strlen(printbuffer);
 686
 687 }
 688 #else
 689 static inline void dbg(const char *fmt, ...)
 690 {
 691 }
 692 #endif
 693
 694 /** U-Boot INIT FUNCTIONS *************************************************/
 695
 696 struct stdio_dev *search_device(int flags, const char *name)
 697 {
 698         struct stdio_dev *dev;
 699
 700         dev = stdio_get_by_name(name);
 701
 702         if (dev && (dev->flags & flags))
 703                 return dev;
 704
 705         return NULL;
 706 }
 707
 708 int console_assign(int file, const char *devname)
 709 {
 710         int flag;
 711         struct stdio_dev *dev;
 712
 713         /* Check for valid file */
 714         switch (file) {
 715         case stdin:
 716                 flag = DEV_FLAGS_INPUT;
 717                 break;
 718         case stdout:
 719         case stderr:
 720                 flag = DEV_FLAGS_OUTPUT;
 721                 break;
 722         default:
 723                 return -1;
 724         }
 725
 726         /* Check for valid device name */
 727
 728         dev = search_device(flag, devname);
 729
 730         if (dev)
 731                 return console_setfile(file, dev);
 732
 733         return -1;
 734 }
 735
 736 /* Called before relocation - use serial functions */
 737 int console_init_f(void)
 738 {
 739         gd->have_console = 1;
 740
 741 #ifdef CONFIG_SILENT_CONSOLE
 742         if (getenv("silent") != NULL)
 743                 gd->flags |= GD_FLG_SILENT;
 744 #endif
 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 #ifdef CONFIG_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 #ifdef CONFIG_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  = getenv("stdin");
 799         stdoutname = getenv("stdout");
 800         stderrname = getenv("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 #ifdef CONFIG_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 #ifdef CONFIG_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
 847 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 848         /* set the environment variables (will overwrite previous env settings) */
 849         for (i = 0; i < 3; i++) {
 850                 setenv(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_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 #ifdef CONFIG_SPLASH_SCREEN
 877         /*
 878          * suppress all output if splash screen is enabled and we have
 879          * a bmp to display. We redirect the output from frame buffer
 880          * console to serial console in this case or suppress it if
 881          * "silent" mode was requested.
 882          */
 883         if (getenv("splashimage") != NULL) {
 884                 if (!(gd->flags & GD_FLG_SILENT))
 885                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 886         }
 887 #endif
 888
 889         /* Scan devices looking for input and output devices */
 890         list_for_each(pos, list) {
 891                 dev = list_entry(pos, struct stdio_dev, list);
 892
 893                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 894                         inputdev = dev;
 895                 }
 896                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 897                         outputdev = dev;
 898                 }
 899                 if(inputdev && outputdev)
 900                         break;
 901         }
 902
 903         /* Initializes output console first */
 904         if (outputdev != NULL) {
 905                 console_setfile(stdout, outputdev);
 906                 console_setfile(stderr, outputdev);
 907 #ifdef CONFIG_CONSOLE_MUX
 908                 console_devices[stdout][0] = outputdev;
 909                 console_devices[stderr][0] = outputdev;
 910 #endif
 911         }
 912
 913         /* Initializes input console */
 914         if (inputdev != NULL) {
 915                 console_setfile(stdin, inputdev);
 916 #ifdef CONFIG_CONSOLE_MUX
 917                 console_devices[stdin][0] = inputdev;
 918 #endif
 919         }
 920
 921 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 922         stdio_print_current_devices();
 923 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 924
 925         /* Setting environment variables */
 926         for (i = 0; i < 3; i++) {
 927                 setenv(stdio_names[i], stdio_devices[i]->name);
 928         }
 929
 930         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 931
 932 #if 0
 933         /* If nothing usable installed, use only the initial console */
 934         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 935                 return 0;
 936 #endif
 937         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 938         return 0;
 939 }
 940
 941 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */