common/console.c

   1 /*
   2  * (C) Copyright 2000
   3  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <stdarg.h>
  26 #include <malloc.h>
  27 #include <stdio_dev.h>
  28 #include <exports.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 #ifdef CONFIG_AMIGAONEG3SE
  33 int console_changed = 0;
  34 #endif
  35
  36 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
  37 /*
  38  * if overwrite_console returns 1, the stdin, stderr and stdout
  39  * are switched to the serial port, else the settings in the
  40  * environment are used
  41  */
  42 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
  43 extern int overwrite_console(void);
  44 #define OVERWRITE_CONSOLE overwrite_console()
  45 #else
  46 #define OVERWRITE_CONSOLE 0
  47 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
  48
  49 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
  50
  51 static int console_setfile(int file, struct stdio_dev * dev)
  52 {
  53         int error = 0;
  54
  55         if (dev == NULL)
  56                 return -1;
  57
  58         switch (file) {
  59         case stdin:
  60         case stdout:
  61         case stderr:
  62                 /* Start new device */
  63                 if (dev->start) {
  64                         error = dev->start();
  65                         /* If it's not started dont use it */
  66                         if (error < 0)
  67                                 break;
  68                 }
  69
  70                 /* Assign the new device (leaving the existing one started) */
  71                 stdio_devices[file] = dev;
  72
  73                 /*
  74                  * Update monitor functions
  75                  * (to use the console stuff by other applications)
  76                  */
  77                 switch (file) {
  78                 case stdin:
  79                         gd->jt[XF_getc] = dev->getc;
  80                         gd->jt[XF_tstc] = dev->tstc;
  81                         break;
  82                 case stdout:
  83                         gd->jt[XF_putc] = dev->putc;
  84                         gd->jt[XF_puts] = dev->puts;
  85                         gd->jt[XF_printf] = printf;
  86                         break;
  87                 }
  88                 break;
  89
  90         default:                /* Invalid file ID */
  91                 error = -1;
  92         }
  93         return error;
  94 }
  95
  96 #if defined(CONFIG_CONSOLE_MUX)
  97 /** Console I/O multiplexing *******************************************/
  98
  99 static struct stdio_dev *tstcdev;
 100 struct stdio_dev **console_devices[MAX_FILES];
 101 int cd_count[MAX_FILES];
 102
 103 /*
 104  * This depends on tstc() always being called before getc().
 105  * This is guaranteed to be true because this routine is called
 106  * only from fgetc() which assures it.
 107  * No attempt is made to demultiplex multiple input sources.
 108  */
 109 static int console_getc(int file)
 110 {
 111         unsigned char ret;
 112
 113         /* This is never called with testcdev == NULL */
 114         ret = tstcdev->getc();
 115         tstcdev = NULL;
 116         return ret;
 117 }
 118
 119 static int console_tstc(int file)
 120 {
 121         int i, ret;
 122         struct stdio_dev *dev;
 123
 124         disable_ctrlc(1);
 125         for (i = 0; i < cd_count[file]; i++) {
 126                 dev = console_devices[file][i];
 127                 if (dev->tstc != NULL) {
 128                         ret = dev->tstc();
 129                         if (ret > 0) {
 130                                 tstcdev = dev;
 131                                 disable_ctrlc(0);
 132                                 return ret;
 133                         }
 134                 }
 135         }
 136         disable_ctrlc(0);
 137
 138         return 0;
 139 }
 140
 141 static void console_putc(int file, const char c)
 142 {
 143         int i;
 144         struct stdio_dev *dev;
 145
 146         for (i = 0; i < cd_count[file]; i++) {
 147                 dev = console_devices[file][i];
 148                 if (dev->putc != NULL)
 149                         dev->putc(c);
 150         }
 151 }
 152
 153 static void console_puts(int file, const char *s)
 154 {
 155         int i;
 156         struct stdio_dev *dev;
 157
 158         for (i = 0; i < cd_count[file]; i++) {
 159                 dev = console_devices[file][i];
 160                 if (dev->puts != NULL)
 161                         dev->puts(s);
 162         }
 163 }
 164
 165 static inline void console_printdevs(int file)
 166 {
 167         iomux_printdevs(file);
 168 }
 169
 170 static inline void console_doenv(int file, struct stdio_dev *dev)
 171 {
 172         iomux_doenv(file, dev->name);
 173 }
 174 #else
 175 static inline int console_getc(int file)
 176 {
 177         return stdio_devices[file]->getc();
 178 }
 179
 180 static inline int console_tstc(int file)
 181 {
 182         return stdio_devices[file]->tstc();
 183 }
 184
 185 static inline void console_putc(int file, const char c)
 186 {
 187         stdio_devices[file]->putc(c);
 188 }
 189
 190 static inline void console_puts(int file, const char *s)
 191 {
 192         stdio_devices[file]->puts(s);
 193 }
 194
 195 static inline void console_printdevs(int file)
 196 {
 197         printf("%s\n", stdio_devices[file]->name);
 198 }
 199
 200 static inline void console_doenv(int file, struct stdio_dev *dev)
 201 {
 202         console_setfile(file, dev);
 203 }
 204 #endif /* defined(CONFIG_CONSOLE_MUX) */
 205
 206 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 207
 208 void serial_printf(const char *fmt, ...)
 209 {
 210         va_list args;
 211         uint i;
 212         char printbuffer[CONFIG_SYS_PBSIZE];
 213
 214         va_start(args, fmt);
 215
 216         /* For this to work, printbuffer must be larger than
 217          * anything we ever want to print.
 218          */
 219         i = vsprintf(printbuffer, fmt, args);
 220         va_end(args);
 221
 222         serial_puts(printbuffer);
 223 }
 224
 225 int fgetc(int file)
 226 {
 227         if (file < MAX_FILES) {
 228 #if defined(CONFIG_CONSOLE_MUX)
 229                 /*
 230                  * Effectively poll for input wherever it may be available.
 231                  */
 232                 for (;;) {
 233                         /*
 234                          * Upper layer may have already called tstc() so
 235                          * check for that first.
 236                          */
 237                         if (tstcdev != NULL)
 238                                 return console_getc(file);
 239                         console_tstc(file);
 240 #ifdef CONFIG_WATCHDOG
 241                         /*
 242                          * If the watchdog must be rate-limited then it should
 243                          * already be handled in board-specific code.
 244                          */
 245                          udelay(1);
 246 #endif
 247                 }
 248 #else
 249                 return console_getc(file);
 250 #endif
 251         }
 252
 253         return -1;
 254 }
 255
 256 int ftstc(int file)
 257 {
 258         if (file < MAX_FILES)
 259                 return console_tstc(file);
 260
 261         return -1;
 262 }
 263
 264 void fputc(int file, const char c)
 265 {
 266         if (file < MAX_FILES)
 267                 console_putc(file, c);
 268 }
 269
 270 void fputs(int file, const char *s)
 271 {
 272         if (file < MAX_FILES)
 273                 console_puts(file, s);
 274 }
 275
 276 void fprintf(int file, const char *fmt, ...)
 277 {
 278         va_list args;
 279         uint i;
 280         char printbuffer[CONFIG_SYS_PBSIZE];
 281
 282         va_start(args, fmt);
 283
 284         /* For this to work, printbuffer must be larger than
 285          * anything we ever want to print.
 286          */
 287         i = vsprintf(printbuffer, fmt, args);
 288         va_end(args);
 289
 290         /* Send to desired file */
 291         fputs(file, printbuffer);
 292 }
 293
 294 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 295
 296 int getc(void)
 297 {
 298 #ifdef CONFIG_DISABLE_CONSOLE
 299         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 300                 return 0;
 301 #endif
 302
 303         if (gd->flags & GD_FLG_DEVINIT) {
 304                 /* Get from the standard input */
 305                 return fgetc(stdin);
 306         }
 307
 308         /* Send directly to the handler */
 309         return serial_getc();
 310 }
 311
 312 int tstc(void)
 313 {
 314 #ifdef CONFIG_DISABLE_CONSOLE
 315         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 316                 return 0;
 317 #endif
 318
 319         if (gd->flags & GD_FLG_DEVINIT) {
 320                 /* Test the standard input */
 321                 return ftstc(stdin);
 322         }
 323
 324         /* Send directly to the handler */
 325         return serial_tstc();
 326 }
 327
 328 void putc(const char c)
 329 {
 330 #ifdef CONFIG_SILENT_CONSOLE
 331         if (gd->flags & GD_FLG_SILENT)
 332                 return;
 333 #endif
 334
 335 #ifdef CONFIG_DISABLE_CONSOLE
 336         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 337                 return;
 338 #endif
 339
 340         if (gd->flags & GD_FLG_DEVINIT) {
 341                 /* Send to the standard output */
 342                 fputc(stdout, c);
 343         } else {
 344                 /* Send directly to the handler */
 345                 serial_putc(c);
 346         }
 347 }
 348
 349 void puts(const char *s)
 350 {
 351 #ifdef CONFIG_SILENT_CONSOLE
 352         if (gd->flags & GD_FLG_SILENT)
 353                 return;
 354 #endif
 355
 356 #ifdef CONFIG_DISABLE_CONSOLE
 357         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 358                 return;
 359 #endif
 360
 361         if (gd->flags & GD_FLG_DEVINIT) {
 362                 /* Send to the standard output */
 363                 fputs(stdout, s);
 364         } else {
 365                 /* Send directly to the handler */
 366                 serial_puts(s);
 367         }
 368 }
 369
 370 void printf(const char *fmt, ...)
 371 {
 372         va_list args;
 373         uint i;
 374         char printbuffer[CONFIG_SYS_PBSIZE];
 375
 376         va_start(args, fmt);
 377
 378         /* For this to work, printbuffer must be larger than
 379          * anything we ever want to print.
 380          */
 381         i = vsprintf(printbuffer, fmt, args);
 382         va_end(args);
 383
 384         /* Print the string */
 385         puts(printbuffer);
 386 }
 387
 388 void vprintf(const char *fmt, va_list args)
 389 {
 390         uint i;
 391         char printbuffer[CONFIG_SYS_PBSIZE];
 392
 393         /* For this to work, printbuffer must be larger than
 394          * anything we ever want to print.
 395          */
 396         i = vsprintf(printbuffer, fmt, args);
 397
 398         /* Print the string */
 399         puts(printbuffer);
 400 }
 401
 402 /* test if ctrl-c was pressed */
 403 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 404 static int ctrlc_was_pressed = 0;
 405 int ctrlc(void)
 406 {
 407         if (!ctrlc_disabled && gd->have_console) {
 408                 if (tstc()) {
 409                         switch (getc()) {
 410                         case 0x03:              /* ^C - Control C */
 411                                 ctrlc_was_pressed = 1;
 412                                 return 1;
 413                         default:
 414                                 break;
 415                         }
 416                 }
 417         }
 418         return 0;
 419 }
 420
 421 /* pass 1 to disable ctrlc() checking, 0 to enable.
 422  * returns previous state
 423  */
 424 int disable_ctrlc(int disable)
 425 {
 426         int prev = ctrlc_disabled;      /* save previous state */
 427
 428         ctrlc_disabled = disable;
 429         return prev;
 430 }
 431
 432 int had_ctrlc (void)
 433 {
 434         return ctrlc_was_pressed;
 435 }
 436
 437 void clear_ctrlc(void)
 438 {
 439         ctrlc_was_pressed = 0;
 440 }
 441
 442 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
 443 char    screen[1024];
 444 char *cursor = screen;
 445 int once = 0;
 446 inline void dbg(const char *fmt, ...)
 447 {
 448         va_list args;
 449         uint    i;
 450         char    printbuffer[CONFIG_SYS_PBSIZE];
 451
 452         if (!once) {
 453                 memset(screen, 0, sizeof(screen));
 454                 once++;
 455         }
 456
 457         va_start(args, fmt);
 458
 459         /* For this to work, printbuffer must be larger than
 460          * anything we ever want to print.
 461          */
 462         i = vsprintf(printbuffer, fmt, args);
 463         va_end(args);
 464
 465         if ((screen + sizeof(screen) - 1 - cursor)
 466             < strlen(printbuffer) + 1) {
 467                 memset(screen, 0, sizeof(screen));
 468                 cursor = screen;
 469         }
 470         sprintf(cursor, printbuffer);
 471         cursor += strlen(printbuffer);
 472
 473 }
 474 #else
 475 inline void dbg(const char *fmt, ...)
 476 {
 477 }
 478 #endif
 479
 480 /** U-Boot INIT FUNCTIONS *************************************************/
 481
 482 struct stdio_dev *search_device(int flags, char *name)
 483 {
 484         struct stdio_dev *dev;
 485
 486         dev = stdio_get_by_name(name);
 487
 488         if (dev && (dev->flags & flags))
 489                 return dev;
 490
 491         return NULL;
 492 }
 493
 494 int console_assign(int file, char *devname)
 495 {
 496         int flag;
 497         struct stdio_dev *dev;
 498
 499         /* Check for valid file */
 500         switch (file) {
 501         case stdin:
 502                 flag = DEV_FLAGS_INPUT;
 503                 break;
 504         case stdout:
 505         case stderr:
 506                 flag = DEV_FLAGS_OUTPUT;
 507                 break;
 508         default:
 509                 return -1;
 510         }
 511
 512         /* Check for valid device name */
 513
 514         dev = search_device(flag, devname);
 515
 516         if (dev)
 517                 return console_setfile(file, dev);
 518
 519         return -1;
 520 }
 521
 522 /* Called before relocation - use serial functions */
 523 int console_init_f(void)
 524 {
 525         gd->have_console = 1;
 526
 527 #ifdef CONFIG_SILENT_CONSOLE
 528         if (getenv("silent") != NULL)
 529                 gd->flags |= GD_FLG_SILENT;
 530 #endif
 531
 532         return 0;
 533 }
 534
 535 void stdio_print_current_devices(void)
 536 {
 537 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 538         /* Print information */
 539         puts("In:    ");
 540         if (stdio_devices[stdin] == NULL) {
 541                 puts("No input devices available!\n");
 542         } else {
 543                 printf ("%s\n", stdio_devices[stdin]->name);
 544         }
 545
 546         puts("Out:   ");
 547         if (stdio_devices[stdout] == NULL) {
 548                 puts("No output devices available!\n");
 549         } else {
 550                 printf ("%s\n", stdio_devices[stdout]->name);
 551         }
 552
 553         puts("Err:   ");
 554         if (stdio_devices[stderr] == NULL) {
 555                 puts("No error devices available!\n");
 556         } else {
 557                 printf ("%s\n", stdio_devices[stderr]->name);
 558         }
 559 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 560 }
 561
 562 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
 563 /* Called after the relocation - use desired console functions */
 564 int console_init_r(void)
 565 {
 566         char *stdinname, *stdoutname, *stderrname;
 567         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 568 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 569         int i;
 570 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 571 #ifdef CONFIG_CONSOLE_MUX
 572         int iomux_err = 0;
 573 #endif
 574
 575         /* set default handlers at first */
 576         gd->jt[XF_getc] = serial_getc;
 577         gd->jt[XF_tstc] = serial_tstc;
 578         gd->jt[XF_putc] = serial_putc;
 579         gd->jt[XF_puts] = serial_puts;
 580         gd->jt[XF_printf] = serial_printf;
 581
 582         /* stdin stdout and stderr are in environment */
 583         /* scan for it */
 584         stdinname  = getenv("stdin");
 585         stdoutname = getenv("stdout");
 586         stderrname = getenv("stderr");
 587
 588         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 589                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 590                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 591                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 592 #ifdef CONFIG_CONSOLE_MUX
 593                 iomux_err = iomux_doenv(stdin, stdinname);
 594                 iomux_err += iomux_doenv(stdout, stdoutname);
 595                 iomux_err += iomux_doenv(stderr, stderrname);
 596                 if (!iomux_err)
 597                         /* Successful, so skip all the code below. */
 598                         goto done;
 599 #endif
 600         }
 601         /* if the devices are overwritten or not found, use default device */
 602         if (inputdev == NULL) {
 603                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 604         }
 605         if (outputdev == NULL) {
 606                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 607         }
 608         if (errdev == NULL) {
 609                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 610         }
 611         /* Initializes output console first */
 612         if (outputdev != NULL) {
 613                 /* need to set a console if not done above. */
 614                 console_doenv(stdout, outputdev);
 615         }
 616         if (errdev != NULL) {
 617                 /* need to set a console if not done above. */
 618                 console_doenv(stderr, errdev);
 619         }
 620         if (inputdev != NULL) {
 621                 /* need to set a console if not done above. */
 622                 console_doenv(stdin, inputdev);
 623         }
 624
 625 #ifdef CONFIG_CONSOLE_MUX
 626 done:
 627 #endif
 628
 629         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 630
 631         stdio_print_current_devices();
 632
 633 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 634         /* set the environment variables (will overwrite previous env settings) */
 635         for (i = 0; i < 3; i++) {
 636                 setenv(stdio_names[i], stdio_devices[i]->name);
 637         }
 638 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 639
 640 #if 0
 641         /* If nothing usable installed, use only the initial console */
 642         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 643                 return 0;
 644 #endif
 645         return 0;
 646 }
 647
 648 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
 649
 650 /* Called after the relocation - use desired console functions */
 651 int console_init_r(void)
 652 {
 653         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 654         int i;
 655         struct list_head *list = stdio_get_list();
 656         struct list_head *pos;
 657         struct stdio_dev *dev;
 658
 659 #ifdef CONFIG_SPLASH_SCREEN
 660         /*
 661          * suppress all output if splash screen is enabled and we have
 662          * a bmp to display. We redirect the output from frame buffer
 663          * console to serial console in this case or suppress it if
 664          * "silent" mode was requested.
 665          */
 666         if (getenv("splashimage") != NULL) {
 667                 if (!(gd->flags & GD_FLG_SILENT))
 668                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 669         }
 670 #endif
 671
 672         /* Scan devices looking for input and output devices */
 673         list_for_each(pos, list) {
 674                 dev = list_entry(pos, struct stdio_dev, list);
 675
 676                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 677                         inputdev = dev;
 678                 }
 679                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 680                         outputdev = dev;
 681                 }
 682                 if(inputdev && outputdev)
 683                         break;
 684         }
 685
 686         /* Initializes output console first */
 687         if (outputdev != NULL) {
 688                 console_setfile(stdout, outputdev);
 689                 console_setfile(stderr, outputdev);
 690 #ifdef CONFIG_CONSOLE_MUX
 691                 console_devices[stdout][0] = outputdev;
 692                 console_devices[stderr][0] = outputdev;
 693 #endif
 694         }
 695
 696         /* Initializes input console */
 697         if (inputdev != NULL) {
 698                 console_setfile(stdin, inputdev);
 699 #ifdef CONFIG_CONSOLE_MUX
 700                 console_devices[stdin][0] = inputdev;
 701 #endif
 702         }
 703
 704         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 705
 706         stdio_print_current_devices();
 707
 708         /* Setting environment variables */
 709         for (i = 0; i < 3; i++) {
 710                 setenv(stdio_names[i], stdio_devices[i]->name);
 711         }
 712
 713 #if 0
 714         /* If nothing usable installed, use only the initial console */
 715         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 716                 return 0;
 717 #endif
 718
 719         return 0;
 720 }
 721
 722 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */