LXR uboot/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 <env.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 <env_internal.h>
  21#include <watchdog.h>
  22
  23DECLARE_GLOBAL_DATA_PTR;
  24
  25static 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}
  65U_BOOT_ENV_CALLBACK(console, on_console);
  66
  67#ifdef CONFIG_SILENT_CONSOLE
  68static 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}
  87U_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
  97extern 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
 105static 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 */
 157static 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
 176static struct stdio_dev *tstcdev;
 177struct stdio_dev **console_devices[MAX_FILES];
 178int 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 */
 186static 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
 196static int console_tstc(int file)
 197{
 198        int i, ret;
 199        struct stdio_dev *dev;
 200        int prev;
 201
 202        prev = disable_ctrlc(1);
 203        for (i = 0; i < cd_count[file]; i++) {
 204                dev = console_devices[file][i];
 205                if (dev->tstc != NULL) {
 206                        ret = dev->tstc(dev);
 207                        if (ret > 0) {
 208                                tstcdev = dev;
 209                                disable_ctrlc(prev);
 210                                return ret;
 211                        }
 212                }
 213        }
 214        disable_ctrlc(prev);
 215
 216        return 0;
 217}
 218
 219static void console_putc(int file, const char c)
 220{
 221        int i;
 222        struct stdio_dev *dev;
 223
 224        for (i = 0; i < cd_count[file]; i++) {
 225                dev = console_devices[file][i];
 226                if (dev->putc != NULL)
 227                        dev->putc(dev, c);
 228        }
 229}
 230
 231static void console_puts_noserial(int file, const char *s)
 232{
 233        int i;
 234        struct stdio_dev *dev;
 235
 236        for (i = 0; i < cd_count[file]; i++) {
 237                dev = console_devices[file][i];
 238                if (dev->puts != NULL && !console_dev_is_serial(dev))
 239                        dev->puts(dev, s);
 240        }
 241}
 242
 243static void console_puts(int file, const char *s)
 244{
 245        int i;
 246        struct stdio_dev *dev;
 247
 248        for (i = 0; i < cd_count[file]; i++) {
 249                dev = console_devices[file][i];
 250                if (dev->puts != NULL)
 251                        dev->puts(dev, s);
 252        }
 253}
 254
 255#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 256static inline void console_doenv(int file, struct stdio_dev *dev)
 257{
 258        iomux_doenv(file, dev->name);
 259}
 260#endif
 261#else
 262static inline int console_getc(int file)
 263{
 264        return stdio_devices[file]->getc(stdio_devices[file]);
 265}
 266
 267static inline int console_tstc(int file)
 268{
 269        return stdio_devices[file]->tstc(stdio_devices[file]);
 270}
 271
 272static inline void console_putc(int file, const char c)
 273{
 274        stdio_devices[file]->putc(stdio_devices[file], c);
 275}
 276
 277static inline void console_puts_noserial(int file, const char *s)
 278{
 279        if (!console_dev_is_serial(stdio_devices[file]))
 280                stdio_devices[file]->puts(stdio_devices[file], s);
 281}
 282
 283static inline void console_puts(int file, const char *s)
 284{
 285        stdio_devices[file]->puts(stdio_devices[file], s);
 286}
 287
 288#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 289static inline void console_doenv(int file, struct stdio_dev *dev)
 290{
 291        console_setfile(file, dev);
 292}
 293#endif
 294#endif /* CONIFIG_IS_ENABLED(CONSOLE_MUX) */
 295
 296/** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 297
 298int serial_printf(const char *fmt, ...)
 299{
 300        va_list args;
 301        uint i;
 302        char printbuffer[CONFIG_SYS_PBSIZE];
 303
 304        va_start(args, fmt);
 305
 306        /* For this to work, printbuffer must be larger than
 307         * anything we ever want to print.
 308         */
 309        i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 310        va_end(args);
 311
 312        serial_puts(printbuffer);
 313        return i;
 314}
 315
 316int fgetc(int file)
 317{
 318        if (file < MAX_FILES) {
 319                /*
 320                 * Effectively poll for input wherever it may be available.
 321                 */
 322                for (;;) {
 323                        WATCHDOG_RESET();
 324#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 325                        /*
 326                         * Upper layer may have already called tstc() so
 327                         * check for that first.
 328                         */
 329                        if (tstcdev != NULL)
 330                                return console_getc(file);
 331                        console_tstc(file);
 332#else
 333                        if (console_tstc(file))
 334                                return console_getc(file);
 335#endif
 336#ifdef CONFIG_WATCHDOG
 337                        /*
 338                         * If the watchdog must be rate-limited then it should
 339                         * already be handled in board-specific code.
 340                         */
 341                         udelay(1);
 342#endif
 343                }
 344        }
 345
 346        return -1;
 347}
 348
 349int ftstc(int file)
 350{
 351        if (file < MAX_FILES)
 352                return console_tstc(file);
 353
 354        return -1;
 355}
 356
 357void fputc(int file, const char c)
 358{
 359        if (file < MAX_FILES)
 360                console_putc(file, c);
 361}
 362
 363void fputs(int file, const char *s)
 364{
 365        if (file < MAX_FILES)
 366                console_puts(file, s);
 367}
 368
 369int fprintf(int file, const char *fmt, ...)
 370{
 371        va_list args;
 372        uint i;
 373        char printbuffer[CONFIG_SYS_PBSIZE];
 374
 375        va_start(args, fmt);
 376
 377        /* For this to work, printbuffer must be larger than
 378         * anything we ever want to print.
 379         */
 380        i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 381        va_end(args);
 382
 383        /* Send to desired file */
 384        fputs(file, printbuffer);
 385        return i;
 386}
 387
 388/** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 389
 390int getc(void)
 391{
 392#ifdef CONFIG_DISABLE_CONSOLE
 393        if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 394                return 0;
 395#endif
 396
 397        if (!gd->have_console)
 398                return 0;
 399
 400#ifdef CONFIG_CONSOLE_RECORD
 401        if (gd->console_in.start) {
 402                int ch;
 403
 404                ch = membuff_getbyte(&gd->console_in);
 405                if (ch != -1)
 406                        return 1;
 407        }
 408#endif
 409        if (gd->flags & GD_FLG_DEVINIT) {
 410                /* Get from the standard input */
 411                return fgetc(stdin);
 412        }
 413
 414        /* Send directly to the handler */
 415        return serial_getc();
 416}
 417
 418int tstc(void)
 419{
 420#ifdef CONFIG_DISABLE_CONSOLE
 421        if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 422                return 0;
 423#endif
 424
 425        if (!gd->have_console)
 426                return 0;
 427#ifdef CONFIG_CONSOLE_RECORD
 428        if (gd->console_in.start) {
 429                if (membuff_peekbyte(&gd->console_in) != -1)
 430                        return 1;
 431        }
 432#endif
 433        if (gd->flags & GD_FLG_DEVINIT) {
 434                /* Test the standard input */
 435                return ftstc(stdin);
 436        }
 437
 438        /* Send directly to the handler */
 439        return serial_tstc();
 440}
 441
 442#define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 443#define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 444
 445#if CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 446#define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 447
 448static void pre_console_putc(const char c)
 449{
 450        char *buffer;
 451
 452        buffer = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 453
 454        buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 455
 456        unmap_sysmem(buffer);
 457}
 458
 459static void pre_console_puts(const char *s)
 460{
 461        while (*s)
 462                pre_console_putc(*s++);
 463}
 464
 465static void print_pre_console_buffer(int flushpoint)
 466{
 467        unsigned long in = 0, out = 0;
 468        char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 469        char *buf_in;
 470
 471#ifdef CONFIG_SILENT_CONSOLE
 472        if (gd->flags & GD_FLG_SILENT)
 473                return;
 474#endif
 475
 476        buf_in = map_sysmem(CONFIG_PRE_CON_BUF_ADDR, CONFIG_PRE_CON_BUF_SZ);
 477        if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 478                in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 479
 480        while (in < gd->precon_buf_idx)
 481                buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 482        unmap_sysmem(buf_in);
 483
 484        buf_out[out] = 0;
 485
 486        switch (flushpoint) {
 487        case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 488                puts(buf_out);
 489                break;
 490        case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 491                console_puts_noserial(stdout, buf_out);
 492                break;
 493        }
 494}
 495#else
 496static inline void pre_console_putc(const char c) {}
 497static inline void pre_console_puts(const char *s) {}
 498static inline void print_pre_console_buffer(int flushpoint) {}
 499#endif
 500
 501void putc(const char c)
 502{
 503#ifdef CONFIG_SANDBOX
 504        /* sandbox can send characters to stdout before it has a console */
 505        if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 506                os_putc(c);
 507                return;
 508        }
 509#endif
 510#ifdef CONFIG_DEBUG_UART
 511        /* if we don't have a console yet, use the debug UART */
 512        if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 513                printch(c);
 514                return;
 515        }
 516#endif
 517        if (!gd)
 518                return;
 519#ifdef CONFIG_CONSOLE_RECORD
 520        if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 521                membuff_putbyte(&gd->console_out, c);
 522#endif
 523#ifdef CONFIG_SILENT_CONSOLE
 524        if (gd->flags & GD_FLG_SILENT) {
 525                if (!(gd->flags & GD_FLG_DEVINIT))
 526                        pre_console_putc(c);
 527                return;
 528        }
 529#endif
 530
 531#ifdef CONFIG_DISABLE_CONSOLE
 532        if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 533                return;
 534#endif
 535
 536        if (!gd->have_console)
 537                return pre_console_putc(c);
 538
 539        if (gd->flags & GD_FLG_DEVINIT) {
 540                /* Send to the standard output */
 541                fputc(stdout, c);
 542        } else {
 543                /* Send directly to the handler */
 544                pre_console_putc(c);
 545                serial_putc(c);
 546        }
 547}
 548
 549void puts(const char *s)
 550{
 551#ifdef CONFIG_SANDBOX
 552        /* sandbox can send characters to stdout before it has a console */
 553        if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 554                os_puts(s);
 555                return;
 556        }
 557#endif
 558#ifdef CONFIG_DEBUG_UART
 559        if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 560                while (*s) {
 561                        int ch = *s++;
 562
 563                        printch(ch);
 564                }
 565                return;
 566        }
 567#endif
 568        if (!gd)
 569                return;
 570#ifdef CONFIG_CONSOLE_RECORD
 571        if ((gd->flags & GD_FLG_RECORD) && gd->console_out.start)
 572                membuff_put(&gd->console_out, s, strlen(s));
 573#endif
 574#ifdef CONFIG_SILENT_CONSOLE
 575        if (gd->flags & GD_FLG_SILENT) {
 576                if (!(gd->flags & GD_FLG_DEVINIT))
 577                        pre_console_puts(s);
 578                return;
 579        }
 580#endif
 581
 582#ifdef CONFIG_DISABLE_CONSOLE
 583        if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 584                return;
 585#endif
 586
 587        if (!gd->have_console)
 588                return pre_console_puts(s);
 589
 590        if (gd->flags & GD_FLG_DEVINIT) {
 591                /* Send to the standard output */
 592                fputs(stdout, s);
 593        } else {
 594                /* Send directly to the handler */
 595                pre_console_puts(s);
 596                serial_puts(s);
 597        }
 598}
 599
 600#ifdef CONFIG_CONSOLE_RECORD
 601int console_record_init(void)
 602{
 603        int ret;
 604
 605        ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
 606        if (ret)
 607                return ret;
 608        ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
 609
 610        return ret;
 611}
 612
 613void console_record_reset(void)
 614{
 615        membuff_purge(&gd->console_out);
 616        membuff_purge(&gd->console_in);
 617}
 618
 619void console_record_reset_enable(void)
 620{
 621        console_record_reset();
 622        gd->flags |= GD_FLG_RECORD;
 623}
 624#endif
 625
 626/* test if ctrl-c was pressed */
 627static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 628static int ctrlc_was_pressed = 0;
 629int ctrlc(void)
 630{
 631        if (!ctrlc_disabled && gd->have_console) {
 632                if (tstc()) {
 633                        switch (getc()) {
 634                        case 0x03:              /* ^C - Control C */
 635                                ctrlc_was_pressed = 1;
 636                                return 1;
 637                        default:
 638                                break;
 639                        }
 640                }
 641        }
 642
 643        return 0;
 644}
 645/* Reads user's confirmation.
 646   Returns 1 if user's input is "y", "Y", "yes" or "YES"
 647*/
 648int confirm_yesno(void)
 649{
 650        int i;
 651        char str_input[5];
 652
 653        /* Flush input */
 654        while (tstc())
 655                getc();
 656        i = 0;
 657        while (i < sizeof(str_input)) {
 658                str_input[i] = getc();
 659                putc(str_input[i]);
 660                if (str_input[i] == '\r')
 661                        break;
 662                i++;
 663        }
 664        putc('\n');
 665        if (strncmp(str_input, "y\r", 2) == 0 ||
 666            strncmp(str_input, "Y\r", 2) == 0 ||
 667            strncmp(str_input, "yes\r", 4) == 0 ||
 668            strncmp(str_input, "YES\r", 4) == 0)
 669                return 1;
 670        return 0;
 671}
 672/* pass 1 to disable ctrlc() checking, 0 to enable.
 673 * returns previous state
 674 */
 675int disable_ctrlc(int disable)
 676{
 677        int prev = ctrlc_disabled;      /* save previous state */
 678
 679        ctrlc_disabled = disable;
 680        return prev;
 681}
 682
 683int had_ctrlc (void)
 684{
 685        return ctrlc_was_pressed;
 686}
 687
 688void clear_ctrlc(void)
 689{
 690        ctrlc_was_pressed = 0;
 691}
 692
 693/** U-Boot INIT FUNCTIONS *************************************************/
 694
 695struct stdio_dev *search_device(int flags, const char *name)
 696{
 697        struct stdio_dev *dev;
 698
 699        dev = stdio_get_by_name(name);
 700#ifdef CONFIG_VIDCONSOLE_AS_LCD
 701        if (!dev && !strcmp(name, "lcd"))
 702                dev = stdio_get_by_name("vidconsole");
 703#endif
 704
 705        if (dev && (dev->flags & flags))
 706                return dev;
 707
 708        return NULL;
 709}
 710
 711int console_assign(int file, const char *devname)
 712{
 713        int flag;
 714        struct stdio_dev *dev;
 715
 716        /* Check for valid file */
 717        switch (file) {
 718        case stdin:
 719                flag = DEV_FLAGS_INPUT;
 720                break;
 721        case stdout:
 722        case stderr:
 723                flag = DEV_FLAGS_OUTPUT;
 724                break;
 725        default:
 726                return -1;
 727        }
 728
 729        /* Check for valid device name */
 730
 731        dev = search_device(flag, devname);
 732
 733        if (dev)
 734                return console_setfile(file, dev);
 735
 736        return -1;
 737}
 738
 739/* return true if the 'silent' flag is removed */
 740static bool console_update_silent(void)
 741{
 742#ifdef CONFIG_SILENT_CONSOLE
 743        if (env_get("silent")) {
 744                gd->flags |= GD_FLG_SILENT;
 745        } else {
 746                unsigned long flags = gd->flags;
 747
 748                gd->flags &= ~GD_FLG_SILENT;
 749
 750                return !!(flags & GD_FLG_SILENT);
 751        }
 752#endif
 753
 754        return false;
 755}
 756
 757int console_announce_r(void)
 758{
 759#if !CONFIG_IS_ENABLED(PRE_CONSOLE_BUFFER)
 760        char buf[DISPLAY_OPTIONS_BANNER_LENGTH];
 761
 762        display_options_get_banner(false, buf, sizeof(buf));
 763
 764        console_puts_noserial(stdout, buf);
 765#endif
 766
 767        return 0;
 768}
 769
 770/* Called before relocation - use serial functions */
 771int console_init_f(void)
 772{
 773        gd->have_console = 1;
 774
 775        console_update_silent();
 776
 777        print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 778
 779        return 0;
 780}
 781
 782void stdio_print_current_devices(void)
 783{
 784        /* Print information */
 785        puts("In:    ");
 786        if (stdio_devices[stdin] == NULL) {
 787                puts("No input devices available!\n");
 788        } else {
 789                printf ("%s\n", stdio_devices[stdin]->name);
 790        }
 791
 792        puts("Out:   ");
 793        if (stdio_devices[stdout] == NULL) {
 794                puts("No output devices available!\n");
 795        } else {
 796                printf ("%s\n", stdio_devices[stdout]->name);
 797        }
 798
 799        puts("Err:   ");
 800        if (stdio_devices[stderr] == NULL) {
 801                puts("No error devices available!\n");
 802        } else {
 803                printf ("%s\n", stdio_devices[stderr]->name);
 804        }
 805}
 806
 807#if CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV)
 808/* Called after the relocation - use desired console functions */
 809int console_init_r(void)
 810{
 811        char *stdinname, *stdoutname, *stderrname;
 812        struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 813#ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 814        int i;
 815#endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 816#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 817        int iomux_err = 0;
 818#endif
 819        int flushpoint;
 820
 821        /* update silent for env loaded from flash (initr_env) */
 822        if (console_update_silent())
 823                flushpoint = PRE_CONSOLE_FLUSHPOINT1_SERIAL;
 824        else
 825                flushpoint = PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL;
 826
 827        /* set default handlers at first */
 828        gd->jt->getc  = serial_getc;
 829        gd->jt->tstc  = serial_tstc;
 830        gd->jt->putc  = serial_putc;
 831        gd->jt->puts  = serial_puts;
 832        gd->jt->printf = serial_printf;
 833
 834        /* stdin stdout and stderr are in environment */
 835        /* scan for it */
 836        stdinname  = env_get("stdin");
 837        stdoutname = env_get("stdout");
 838        stderrname = env_get("stderr");
 839
 840        if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 841                inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 842                outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 843                errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 844#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 845                iomux_err = iomux_doenv(stdin, stdinname);
 846                iomux_err += iomux_doenv(stdout, stdoutname);
 847                iomux_err += iomux_doenv(stderr, stderrname);
 848                if (!iomux_err)
 849                        /* Successful, so skip all the code below. */
 850                        goto done;
 851#endif
 852        }
 853        /* if the devices are overwritten or not found, use default device */
 854        if (inputdev == NULL) {
 855                inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 856        }
 857        if (outputdev == NULL) {
 858                outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 859        }
 860        if (errdev == NULL) {
 861                errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 862        }
 863        /* Initializes output console first */
 864        if (outputdev != NULL) {
 865                /* need to set a console if not done above. */
 866                console_doenv(stdout, outputdev);
 867        }
 868        if (errdev != NULL) {
 869                /* need to set a console if not done above. */
 870                console_doenv(stderr, errdev);
 871        }
 872        if (inputdev != NULL) {
 873                /* need to set a console if not done above. */
 874                console_doenv(stdin, inputdev);
 875        }
 876
 877#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 878done:
 879#endif
 880
 881#ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 882        stdio_print_current_devices();
 883#endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 884#ifdef CONFIG_VIDCONSOLE_AS_LCD
 885        if (strstr(stdoutname, "lcd"))
 886                printf("Warning: Please change 'lcd' to 'vidconsole' in stdout/stderr environment vars\n");
 887#endif
 888
 889#ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 890        /* set the environment variables (will overwrite previous env settings) */
 891        for (i = 0; i < MAX_FILES; i++) {
 892                env_set(stdio_names[i], stdio_devices[i]->name);
 893        }
 894#endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 895
 896        gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 897
 898#if 0
 899        /* If nothing usable installed, use only the initial console */
 900        if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 901                return 0;
 902#endif
 903        print_pre_console_buffer(flushpoint);
 904        return 0;
 905}
 906
 907#else /* !CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 908
 909/* Called after the relocation - use desired console functions */
 910int console_init_r(void)
 911{
 912        struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 913        int i;
 914        struct list_head *list = stdio_get_list();
 915        struct list_head *pos;
 916        struct stdio_dev *dev;
 917        int flushpoint;
 918
 919        /* update silent for env loaded from flash (initr_env) */
 920        if (console_update_silent())
 921                flushpoint = PRE_CONSOLE_FLUSHPOINT1_SERIAL;
 922        else
 923                flushpoint = PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL;
 924
 925#ifdef CONFIG_SPLASH_SCREEN
 926        /*
 927         * suppress all output if splash screen is enabled and we have
 928         * a bmp to display. We redirect the output from frame buffer
 929         * console to serial console in this case or suppress it if
 930         * "silent" mode was requested.
 931         */
 932        if (env_get("splashimage") != NULL) {
 933                if (!(gd->flags & GD_FLG_SILENT))
 934                        outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 935        }
 936#endif
 937
 938        /* Scan devices looking for input and output devices */
 939        list_for_each(pos, list) {
 940                dev = list_entry(pos, struct stdio_dev, list);
 941
 942                if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 943                        inputdev = dev;
 944                }
 945                if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 946                        outputdev = dev;
 947                }
 948                if(inputdev && outputdev)
 949                        break;
 950        }
 951
 952        /* Initializes output console first */
 953        if (outputdev != NULL) {
 954                console_setfile(stdout, outputdev);
 955                console_setfile(stderr, outputdev);
 956#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 957                console_devices[stdout][0] = outputdev;
 958                console_devices[stderr][0] = outputdev;
 959#endif
 960        }
 961
 962        /* Initializes input console */
 963        if (inputdev != NULL) {
 964                console_setfile(stdin, inputdev);
 965#if CONFIG_IS_ENABLED(CONSOLE_MUX)
 966                console_devices[stdin][0] = inputdev;
 967#endif
 968        }
 969
 970#ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 971        stdio_print_current_devices();
 972#endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 973
 974        /* Setting environment variables */
 975        for (i = 0; i < MAX_FILES; i++) {
 976                env_set(stdio_names[i], stdio_devices[i]->name);
 977        }
 978
 979        gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 980
 981#if 0
 982        /* If nothing usable installed, use only the initial console */
 983        if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 984                return 0;
 985#endif
 986        print_pre_console_buffer(flushpoint);
 987        return 0;
 988}
 989
 990#endif /* CONFIG_IS_ENABLED(SYS_CONSOLE_IS_IN_ENV) */
 991