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 <dm.h>
  12 #include <stdarg.h>
  13 #include <iomux.h>
  14 #include <malloc.h>
  15 #include <mapmem.h>
  16 #include <os.h>
  17 #include <serial.h>
  18 #include <stdio_dev.h>
  19 #include <exports.h>
  20 #include <environment.h>
  21 #include <watchdog.h>
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 static int on_console(const char *name, const char *value, enum env_op op,
  26         int flags)
  27 {
  28         int console = -1;
  29
  30         /* Check for console redirection */
  31         if (strcmp(name, "stdin") == 0)
  32                 console = stdin;
  33         else if (strcmp(name, "stdout") == 0)
  34                 console = stdout;
  35         else if (strcmp(name, "stderr") == 0)
  36                 console = stderr;
  37
  38         /* if not actually setting a console variable, we don't care */
  39         if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
  40                 return 0;
  41
  42         switch (op) {
  43         case env_op_create:
  44         case env_op_overwrite:
  45
  46 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
  47                 if (iomux_doenv(console, value))
  48                         return 1;
  49 #else
  50                 /* Try assigning specified device */
  51                 if (console_assign(console, value) < 0)
  52                         return 1;
  53 #endif
  54                 return 0;
  55
  56         case env_op_delete:
  57                 if ((flags & H_FORCE) == 0)
  58                         printf("Can't delete \"%s\"\n", name);
  59                 return 1;
  60
  61         default:
  62                 return 0;
  63         }
  64 }
  65 U_BOOT_ENV_CALLBACK(console, on_console);
  66
  67 #ifdef CONFIG_SILENT_CONSOLE
  68 static int on_silent(const char *name, const char *value, enum env_op op,
  69         int flags)
  70 {
  71 #if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_SET)
  72         if (flags & H_INTERACTIVE)
  73                 return 0;
  74 #endif
  75 #if !CONFIG_IS_ENABLED(SILENT_CONSOLE_UPDATE_ON_RELOC)
  76         if ((flags & H_INTERACTIVE) == 0)
  77                 return 0;
  78 #endif
  79
  80         if (value != NULL)
  81                 gd->flags |= GD_FLG_SILENT;
  82         else
  83                 gd->flags &= ~GD_FLG_SILENT;
  84
  85         return 0;
  86 }
  87 U_BOOT_ENV_CALLBACK(silent, on_silent);
  88 #endif
  89
  90 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
  91 /*
  92  * if overwrite_console returns 1, the stdin, stderr and stdout
  93  * are switched to the serial port, else the settings in the
  94  * environment are used
  95  */
  96 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
  97 extern int overwrite_console(void);
  98 #define OVERWRITE_CONSOLE overwrite_console()
  99 #else
 100 #define OVERWRITE_CONSOLE 0
 101 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
 102
 103 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 104
 105 static int console_setfile(int file, struct stdio_dev * dev)
 106 {
 107         int error = 0;
 108
 109         if (dev == NULL)
 110                 return -1;
 111
 112         switch (file) {
 113         case stdin:
 114         case stdout:
 115         case stderr:
 116                 /* Start new device */
 117                 if (dev->start) {
 118                         error = dev->start(dev);
 119                         /* If it's not started dont use it */
 120                         if (error < 0)
 121                                 break;
 122                 }
 123
 124                 /* Assign the new device (leaving the existing one started) */
 125                 stdio_devices[file] = dev;
 126
 127                 /*
 128                  * Update monitor functions
 129                  * (to use the console stuff by other applications)
 130                  */
 131                 switch (file) {
 132                 case stdin:
 133                         gd->jt->getc = getc;
 134                         gd->jt->tstc = tstc;
 135                         break;
 136                 case stdout:
 137                         gd->jt->putc  = putc;
 138                         gd->jt->puts  = puts;
 139                         gd->jt->printf = printf;
 140                         break;
 141                 }
 142                 break;
 143
 144         default:                /* Invalid file ID */
 145                 error = -1;
 146         }
 147         return error;
 148 }
 149
 150 /**
 151  * console_dev_is_serial() - Check if a stdio device is a serial device
 152  *
 153  * @sdev: Device to check
 154  * @return true if this device is in the serial uclass (or for pre-driver-model,
 155  * whether it is called "serial".
 156  */
 157 static bool console_dev_is_serial(struct stdio_dev *sdev)
 158 {
 159         bool is_serial;
 160
 161 #ifdef CONFIG_DM_SERIAL
 162         if (sdev->flags & DEV_FLAGS_DM) {
 163                 struct udevice *dev = sdev->priv;
 164
 165                 is_serial = device_get_uclass_id(dev) == UCLASS_SERIAL;
 166         } else
 167 #endif
 168         is_serial = !strcmp(sdev->name, "serial");
 169
 170         return is_serial;
 171 }
 172
 173 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 174 /** Console I/O multiplexing *******************************************/
 175
 176 static struct stdio_dev *tstcdev;
 177 struct stdio_dev **console_devices[MAX_FILES];
 178 int cd_count[MAX_FILES];
 179
 180 /*
 181  * This depends on tstc() always being called before getc().
 182  * This is guaranteed to be true because this routine is called
 183  * only from fgetc() which assures it.
 184  * No attempt is made to demultiplex multiple input sources.
 185  */
 186 static int console_getc(int file)
 187 {
 188         unsigned char ret;
 189
 190         /* This is never called with testcdev == NULL */
 191         ret = tstcdev->getc(tstcdev);
 192         tstcdev = NULL;
 193         return ret;
 194 }
 195
 196 static int console_tstc(int file)
 197 {
 198         int i, ret;
 199         struct stdio_dev *dev;
 200
 201         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(0);
 209                                 return ret;
 210                         }
 211                 }
 212         }
 213         disable_ctrlc(0);
 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 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 315                 /*
 316                  * Effectively poll for input wherever it may be available.
 317                  */
 318                 for (;;) {
 319                         WATCHDOG_RESET();
 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 #ifdef CONFIG_WATCHDOG
 328                         /*
 329                          * If the watchdog must be rate-limited then it should
 330                          * already be handled in board-specific code.
 331                          */
 332                          udelay(1);
 333 #endif
 334                 }
 335 #else
 336                 return console_getc(file);
 337 #endif
 338         }
 339
 340         return -1;
 341 }
 342
 343 int ftstc(int file)
 344 {
 345         if (file < MAX_FILES)
 346                 return console_tstc(file);
 347
 348         return -1;
 349 }
 350
 351 void fputc(int file, const char c)
 352 {
 353         if (file < MAX_FILES)
 354                 console_putc(file, c);
 355 }
 356
 357 void fputs(int file, const char *s)
 358 {
 359         if (file < MAX_FILES)
 360                 console_puts(file, s);
 361 }
 362
 363 int fprintf(int file, const char *fmt, ...)
 364 {
 365         va_list args;
 366         uint i;
 367         char printbuffer[CONFIG_SYS_PBSIZE];
 368
 369         va_start(args, fmt);
 370
 371         /* For this to work, printbuffer must be larger than
 372          * anything we ever want to print.
 373          */
 374         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 375         va_end(args);
 376
 377         /* Send to desired file */
 378         fputs(file, printbuffer);
 379         return i;
 380 }
 381
 382 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 383
 384 int getc(void)
 385 {
 386 #ifdef CONFIG_DISABLE_CONSOLE
 387         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 388                 return 0;
 389 #endif
 390
 391         if (!gd->have_console)
 392                 return 0;
 393
 394 #ifdef CONFIG_CONSOLE_RECORD
 395         if (gd->console_in.start) {
 396                 int ch;
 397
 398                 ch = membuff_getbyte(&gd->console_in);
 399                 if (ch != -1)
 400                         return 1;
 401         }
 402 #endif
 403         if (gd->flags & GD_FLG_DEVINIT) {
 404                 /* Get from the standard input */
 405                 return fgetc(stdin);
 406         }
 407
 408         /* Send directly to the handler */
 409         return serial_getc();
 410 }
 411
 412 int tstc(void)
 413 {
 414 #ifdef CONFIG_DISABLE_CONSOLE
 415         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 416                 return 0;
 417 #endif
 418
 419         if (!gd->have_console)
 420                 return 0;
 421 #ifdef CONFIG_CONSOLE_RECORD
 422         if (gd->console_in.start) {
 423                 if (membuff_peekbyte(&gd->console_in) != -1)
 424                         return 1;
 425         }
 426 #endif
 427         if (gd->flags & GD_FLG_DEVINIT) {
 428                 /* Test the standard input */
 429                 return ftstc(stdin);
 430         }
 431
 432         /* Send directly to the handler */
 433         return serial_tstc();
 434 }
 435
 436 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 437 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 438
 439 #if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 440 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 441
 442 static void pre_console_putc(const char c)
 443 {
 444         char *buffer;
 445
 446         buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 447
 448         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 449
 450         unmap_sysmem(buffer);
 451 }
 452
 453 static void pre_console_puts(const char *s)
 454 {
 455         while (*s)
 456                 pre_console_putc(*s++);
 457 }
 458
 459 static void print_pre_console_buffer(int flushpoint)
 460 {
 461         unsigned long in = 0, out = 0;
 462         char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 463         char *buf_in;
 464
 465         buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 466         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 467                 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 468
 469         while (in < gd->precon_buf_idx)
 470                 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 471         unmap_sysmem(buf_in);
 472
 473         buf_out[out] = 0;
 474
 475         switch (flushpoint) {
 476         case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 477                 puts(buf_out);
 478                 break;
 479         case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 480                 console_puts_noserial(stdout, buf_out);
 481                 break;
 482         }
 483 }
 484 #else
 485 static inline void pre_console_putc(const char c) {}
 486 static inline void pre_console_puts(const char *s) {}
 487 static inline void print_pre_console_buffer(int flushpoint) {}
 488 #endif
 489
 490 void putc(const char c)
 491 {
 492 #ifdef CONFIG_DEBUG_UART
 493         /* if we don't have a console yet, use the debug UART */
 494         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 495                 printch(c);
 496                 return;
 497         }
 498 #endif
 499 #ifdef CONFIG_CONSOLE_RECORD
 500         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 501                 membuff_putbyte(&gd->console_out, c);
 502 #endif
 503 #ifdef CONFIG_SILENT_CONSOLE
 504         if (gd->flags & GD_FLG_SILENT)
 505                 return;
 506 #endif
 507
 508 #ifdef CONFIG_DISABLE_CONSOLE
 509         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 510                 return;
 511 #endif
 512
 513         if (!gd->have_console)
 514                 return pre_console_putc(c);
 515
 516         if (gd->flags & GD_FLG_DEVINIT) {
 517                 /* Send to the standard output */
 518                 fputc(stdout, c);
 519         } else {
 520                 /* Send directly to the handler */
 521                 pre_console_putc(c);
 522                 serial_putc(c);
 523         }
 524 }
 525
 526 void puts(const char *s)
 527 {
 528 #ifdef CONFIG_DEBUG_UART
 529         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 530                 while (*s) {
 531                         int ch = *s++;
 532
 533                         printch(ch);
 534                 }
 535                 return;
 536         }
 537 #endif
 538 #ifdef CONFIG_CONSOLE_RECORD
 539         if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 540                 membuff_put(&gd->console_out, s, strlen(s));
 541 #endif
 542 #ifdef CONFIG_SILENT_CONSOLE
 543         if (gd->flags & GD_FLG_SILENT)
 544                 return;
 545 #endif
 546
 547 #ifdef CONFIG_DISABLE_CONSOLE
 548         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 549                 return;
 550 #endif
 551
 552         if (!gd->have_console)
 553                 return pre_console_puts(s);
 554
 555         if (gd->flags & GD_FLG_DEVINIT) {
 556                 /* Send to the standard output */
 557                 fputs(stdout, s);
 558         } else {
 559                 /* Send directly to the handler */
 560                 pre_console_puts(s);
 561                 serial_puts(s);
 562         }
 563 }
 564
 565 #ifdef CONFIG_CONSOLE_RECORD
 566 int console_record_init(void)
 567 {
 568         int ret;
 569
 570         ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
 571         if (ret)
 572                 return ret;
 573         ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
 574
 575         return ret;
 576 }
 577
 578 void console_record_reset(void)
 579 {
 580         membuff_purge(&gd->console_out);
 581         membuff_purge(&gd->console_in);
 582 }
 583
 584 void console_record_reset_enable(void)
 585 {
 586         console_record_reset();
 587         gd->flags |= GD_FLG_RECORD;
 588 }
 589 #endif
 590
 591 /* test if ctrl-c was pressed */
 592 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 593 static int ctrlc_was_pressed = 0;
 594 int ctrlc(void)
 595 {
 596 #ifndef CONFIG_SANDBOX
 597         if (!ctrlc_disabled && gd->have_console) {
 598                 if (tstc()) {
 599                         switch (getc()) {
 600                         case 0x03:              /* ^C - Control C */
 601                                 ctrlc_was_pressed = 1;
 602                                 return 1;
 603                         default:
 604                                 break;
 605                         }
 606                 }
 607         }
 608 #endif
 609
 610         return 0;
 611 }
 612 /* Reads user's confirmation.
 613    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 614 */
 615 int confirm_yesno(void)
 616 {
 617         int i;
 618         char str_input[5];
 619
 620         /* Flush input */
 621         while (tstc())
 622                 getc();
 623         i = 0;
 624         while (i < sizeof(str_input)) {
 625                 str_input[i] = getc();
 626                 putc(str_input[i]);
 627                 if (str_input[i] == '\r')
 628                         break;
 629                 i++;
 630         }
 631         putc('\n');
 632         if (strncmp(str_input, "y\r", 2) == 0 ||
 633             strncmp(str_input, "Y\r", 2) == 0 ||
 634             strncmp(str_input, "yes\r", 4) == 0 ||
 635             strncmp(str_input, "YES\r", 4) == 0)
 636                 return 1;
 637         return 0;
 638 }
 639 /* pass 1 to disable ctrlc() checking, 0 to enable.
 640  * returns previous state
 641  */
 642 int disable_ctrlc(int disable)
 643 {
 644         int prev = ctrlc_disabled;      /* save previous state */
 645
 646         ctrlc_disabled = disable;
 647         return prev;
 648 }
 649
 650 int had_ctrlc (void)
 651 {
 652         return ctrlc_was_pressed;
 653 }
 654
 655 void clear_ctrlc(void)
 656 {
 657         ctrlc_was_pressed = 0;
 658 }
 659
 660 /** U-Boot INIT FUNCTIONS *************************************************/
 661
 662 struct stdio_dev *search_device(int flags, const char *name)
 663 {
 664         struct stdio_dev *dev;
 665
 666         dev = stdio_get_by_name(name);
 667 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 668         if (!dev && !strcmp(name, "lcd"))
 669                 dev = stdio_get_by_name("vidconsole");
 670 #endif
 671
 672         if (dev && (dev->flags & flags))
 673                 return dev;
 674
 675         return NULL;
 676 }
 677
 678 int console_assign(int file, const char *devname)
 679 {
 680         int flag;
 681         struct stdio_dev *dev;
 682
 683         /* Check for valid file */
 684         switch (file) {
 685         case stdin:
 686                 flag = DEV_FLAGS_INPUT;
 687                 break;
 688         case stdout:
 689         case stderr:
 690                 flag = DEV_FLAGS_OUTPUT;
 691                 break;
 692         default:
 693                 return -1;
 694         }
 695
 696         /* Check for valid device name */
 697
 698         dev = search_device(flag, devname);
 699
 700         if (dev)
 701                 return console_setfile(file, dev);
 702
 703         return -1;
 704 }
 705
 706 static void console_update_silent(void)
 707 {
 708 #ifdef CONFIG_SILENT_CONSOLE
 709         if (env_get("silent") != NULL)
 710                 gd->flags |= GD_FLG_SILENT;
 711         else
 712                 gd->flags &= ~GD_FLG_SILENT;
 713 #endif
 714 }
 715
 716 int console_announce_r(void)
 717 {
 718 #if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 719         char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
 720
 721         display_options_get_banner(false, buf, sizeof(buf));
 722
 723         console_puts_noserial(stdout, buf);
 724 #endif
 725
 726         return 0;
 727 }
 728
 729 /* Called before relocation - use serial functions */
 730 int console_init_f(void)
 731 {
 732         gd->have_console = 1;
 733
 734         console_update_silent();
 735
 736         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 737
 738         return 0;
 739 }
 740
 741 void stdio_print_current_devices(void)
 742 {
 743         /* Print information */
 744         puts("In:    ");
 745         if (stdio_devices[stdin] == NULL) {
 746                 puts("No input devices available!\n");
 747         } else {
 748                 printf ("%s\n", stdio_devices[stdin]->name);
 749         }
 750
 751         puts("Out:   ");
 752         if (stdio_devices[stdout] == NULL) {
 753                 puts("No output devices available!\n");
 754         } else {
 755                 printf ("%s\n", stdio_devices[stdout]->name);
 756         }
 757
 758         puts("Err:   ");
 759         if (stdio_devices[stderr] == NULL) {
 760                 puts("No error devices available!\n");
 761         } else {
 762                 printf ("%s\n", stdio_devices[stderr]->name);
 763         }
 764 }
 765
 766 #if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 767 /* Called after the relocation - use desired console functions */
 768 int console_init_r(void)
 769 {
 770         char *stdinname, *stdoutname, *stderrname;
 771         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 772 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 773         int i;
 774 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 775 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 776         int iomux_err = 0;
 777 #endif
 778
 779         /* set default handlers at first */
 780         gd->jt->getc  = serial_getc;
 781         gd->jt->tstc  = serial_tstc;
 782         gd->jt->putc  = serial_putc;
 783         gd->jt->puts  = serial_puts;
 784         gd->jt->printf = serial_printf;
 785
 786         /* stdin stdout and stderr are in environment */
 787         /* scan for it */
 788         stdinname  = env_get("stdin");
 789         stdoutname = env_get("stdout");
 790         stderrname = env_get("stderr");
 791
 792         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 793                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 794                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 795                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 796 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 797                 iomux_err = iomux_doenv(stdin, stdinname);
 798                 iomux_err += iomux_doenv(stdout, stdoutname);
 799                 iomux_err += iomux_doenv(stderr, stderrname);
 800                 if (!iomux_err)
 801                         /* Successful, so skip all the code below. */
 802                         goto done;
 803 #endif
 804         }
 805         /* if the devices are overwritten or not found, use default device */
 806         if (inputdev == NULL) {
 807                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 808         }
 809         if (outputdev == NULL) {
 810                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 811         }
 812         if (errdev == NULL) {
 813                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 814         }
 815         /* Initializes output console first */
 816         if (outputdev != NULL) {
 817                 /* need to set a console if not done above. */
 818                 console_doenv(stdout, outputdev);
 819         }
 820         if (errdev != NULL) {
 821                 /* need to set a console if not done above. */
 822                 console_doenv(stderr, errdev);
 823         }
 824         if (inputdev != NULL) {
 825                 /* need to set a console if not done above. */
 826                 console_doenv(stdin, inputdev);
 827         }
 828
 829 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 830 done:
 831 #endif
 832
 833 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 834         stdio_print_current_devices();
 835 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 836 #ifdef CONFIG_VIDCONSOLE_AS_LCD
 837         if (strstr(stdoutname, "lcd"))
 838                 printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
 839 #endif
 840
 841 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 842         /* set the environment variables (will overwrite previous env settings) */
 843         for (i = 0; i < 3; i++) {
 844                 env_set(stdio_names[i], stdio_devices[i]->name);
 845         }
 846 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 847
 848         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 849
 850 #if 0
 851         /* If nothing usable installed, use only the initial console */
 852         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 853                 return 0;
 854 #endif
 855         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 856         return 0;
 857 }
 858
 859 #else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 860
 861 /* Called after the relocation - use desired console functions */
 862 int console_init_r(void)
 863 {
 864         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 865         int i;
 866         struct list_head *list = stdio_get_list();
 867         struct list_head *pos;
 868         struct stdio_dev *dev;
 869
 870         console_update_silent();
 871
 872 #ifdef CONFIG_SPLASH_SCREEN
 873         /*
 874          * suppress all output if splash screen is enabled and we have
 875          * a bmp to display. We redirect the output from frame buffer
 876          * console to serial console in this case or suppress it if
 877          * "silent" mode was requested.
 878          */
 879         if (env_get("splashimage") != NULL) {
 880                 if (!(gd->flags & GD_FLG_SILENT))
 881                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 882         }
 883 #endif
 884
 885         /* Scan devices looking for input and output devices */
 886         list_for_each(pos, list) {
 887                 dev = list_entry(pos, struct stdio_dev, list);
 888
 889                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 890                         inputdev = dev;
 891                 }
 892                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 893                         outputdev = dev;
 894                 }
 895                 if(inputdev && outputdev)
 896                         break;
 897         }
 898
 899         /* Initializes output console first */
 900         if (outputdev != NULL) {
 901                 console_setfile(stdout, outputdev);
 902                 console_setfile(stderr, outputdev);
 903 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 904                 console_devices[stdout][0] = outputdev;
 905                 console_devices[stderr][0] = outputdev;
 906 #endif
 907         }
 908
 909         /* Initializes input console */
 910         if (inputdev != NULL) {
 911                 console_setfile(stdin, inputdev);
 912 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
 913                 console_devices[stdin][0] = inputdev;
 914 #endif
 915         }
 916
 917 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 918         stdio_print_current_devices();
 919 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 920
 921         /* Setting environment variables */
 922         for (i = 0; i < 3; i++) {
 923                 env_set(stdio_names[i], stdio_devices[i]->name);
 924         }
 925
 926         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 927
 928 #if 0
 929         /* If nothing usable installed, use only the initial console */
 930         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 931                 return 0;
 932 #endif
 933         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 934         return 0;
 935 }
 936
 937 #endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */