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_SYS_CONSOLE_IS_IN_ENV 33 /* 34 * if overwrite_console returns 1, the stdin, stderr and stdout 35 * are switched to the serial port, else the settings in the 36 * environment are used 37 */ 38 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE 39 extern int overwrite_console(void); 40 #define OVERWRITE_CONSOLE overwrite_console() 41 #else 42 #define OVERWRITE_CONSOLE 0 43 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */ 44 45 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */ 46 47 static int console_setfile(int file, struct stdio_dev * dev) 48 { 49 int error = 0; 50 51 if (dev == NULL) 52 return -1; 53 54 switch (file) { 55 case stdin: 56 case stdout: 57 case stderr: 58 /* Start new device */ 59 if (dev->start) { 60 error = dev->start(); 61 /* If it's not started dont use it */ 62 if (error < 0) 63 break; 64 } 65 66 /* Assign the new device (leaving the existing one started) */ 67 stdio_devices[file] = dev; 68 69 /* 70 * Update monitor functions 71 * (to use the console stuff by other applications) 72 */ 73 switch (file) { 74 case stdin: 75 gd->jt[XF_getc] = dev->getc; 76 gd->jt[XF_tstc] = dev->tstc; 77 break; 78 case stdout: 79 gd->jt[XF_putc] = dev->putc; 80 gd->jt[XF_puts] = dev->puts; 81 gd->jt[XF_printf] = printf; 82 break; 83 } 84 break; 85 86 default: /* Invalid file ID */ 87 error = -1; 88 } 89 return error; 90 } 91 92 #if defined(CONFIG_CONSOLE_MUX) 93 /** Console I/O multiplexing *******************************************/ 94 95 static struct stdio_dev *tstcdev; 96 struct stdio_dev **console_devices[MAX_FILES]; 97 int cd_count[MAX_FILES]; 98 99 /* 100 * This depends on tstc() always being called before getc(). 101 * This is guaranteed to be true because this routine is called 102 * only from fgetc() which assures it. 103 * No attempt is made to demultiplex multiple input sources. 104 */ 105 static int console_getc(int file) 106 { 107 unsigned char ret; 108 109 /* This is never called with testcdev == NULL */ 110 ret = tstcdev->getc(); 111 tstcdev = NULL; 112 return ret; 113 } 114 115 static int console_tstc(int file) 116 { 117 int i, ret; 118 struct stdio_dev *dev; 119 120 disable_ctrlc(1); 121 for (i = 0; i < cd_count[file]; i++) { 122 dev = console_devices[file][i]; 123 if (dev->tstc != NULL) { 124 ret = dev->tstc(); 125 if (ret > 0) { 126 tstcdev = dev; 127 disable_ctrlc(0); 128 return ret; 129 } 130 } 131 } 132 disable_ctrlc(0); 133 134 return 0; 135 } 136 137 static void console_putc(int file, const char c) 138 { 139 int i; 140 struct stdio_dev *dev; 141 142 for (i = 0; i < cd_count[file]; i++) { 143 dev = console_devices[file][i]; 144 if (dev->putc != NULL) 145 dev->putc(c); 146 } 147 } 148 149 static void console_puts(int file, const char *s) 150 { 151 int i; 152 struct stdio_dev *dev; 153 154 for (i = 0; i < cd_count[file]; i++) { 155 dev = console_devices[file][i]; 156 if (dev->puts != NULL) 157 dev->puts(s); 158 } 159 } 160 161 static inline void console_printdevs(int file) 162 { 163 iomux_printdevs(file); 164 } 165 166 static inline void console_doenv(int file, struct stdio_dev *dev) 167 { 168 iomux_doenv(file, dev->name); 169 } 170 #else 171 static inline int console_getc(int file) 172 { 173 return stdio_devices[file]->getc(); 174 } 175 176 static inline int console_tstc(int file) 177 { 178 return stdio_devices[file]->tstc(); 179 } 180 181 static inline void console_putc(int file, const char c) 182 { 183 stdio_devices[file]->putc(c); 184 } 185 186 static inline void console_puts(int file, const char *s) 187 { 188 stdio_devices[file]->puts(s); 189 } 190 191 static inline void console_printdevs(int file) 192 { 193 printf("%s\n", stdio_devices[file]->name); 194 } 195 196 static inline void console_doenv(int file, struct stdio_dev *dev) 197 { 198 console_setfile(file, dev); 199 } 200 #endif /* defined(CONFIG_CONSOLE_MUX) */ 201 202 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/ 203 204 int serial_printf(const char *fmt, ...) 205 { 206 va_list args; 207 uint i; 208 char printbuffer[CONFIG_SYS_PBSIZE]; 209 210 va_start(args, fmt); 211 212 /* For this to work, printbuffer must be larger than 213 * anything we ever want to print. 214 */ 215 i = vsprintf(printbuffer, fmt, args); 216 va_end(args); 217 218 serial_puts(printbuffer); 219 return i; 220 } 221 222 int fgetc(int file) 223 { 224 if (file < MAX_FILES) { 225 #if defined(CONFIG_CONSOLE_MUX) 226 /* 227 * Effectively poll for input wherever it may be available. 228 */ 229 for (;;) { 230 /* 231 * Upper layer may have already called tstc() so 232 * check for that first. 233 */ 234 if (tstcdev != NULL) 235 return console_getc(file); 236 console_tstc(file); 237 #ifdef CONFIG_WATCHDOG 238 /* 239 * If the watchdog must be rate-limited then it should 240 * already be handled in board-specific code. 241 */ 242 udelay(1); 243 #endif 244 } 245 #else 246 return console_getc(file); 247 #endif 248 } 249 250 return -1; 251 } 252 253 int ftstc(int file) 254 { 255 if (file < MAX_FILES) 256 return console_tstc(file); 257 258 return -1; 259 } 260 261 void fputc(int file, const char c) 262 { 263 if (file < MAX_FILES) 264 console_putc(file, c); 265 } 266 267 void fputs(int file, const char *s) 268 { 269 if (file < MAX_FILES) 270 console_puts(file, s); 271 } 272 273 int fprintf(int file, const char *fmt, ...) 274 { 275 va_list args; 276 uint i; 277 char printbuffer[CONFIG_SYS_PBSIZE]; 278 279 va_start(args, fmt); 280 281 /* For this to work, printbuffer must be larger than 282 * anything we ever want to print. 283 */ 284 i = vsprintf(printbuffer, fmt, args); 285 va_end(args); 286 287 /* Send to desired file */ 288 fputs(file, printbuffer); 289 return i; 290 } 291 292 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/ 293 294 int getc(void) 295 { 296 #ifdef CONFIG_DISABLE_CONSOLE 297 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 298 return 0; 299 #endif 300 301 if (!gd->have_console) 302 return 0; 303 304 if (gd->flags & GD_FLG_DEVINIT) { 305 /* Get from the standard input */ 306 return fgetc(stdin); 307 } 308 309 /* Send directly to the handler */ 310 return serial_getc(); 311 } 312 313 int tstc(void) 314 { 315 #ifdef CONFIG_DISABLE_CONSOLE 316 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 317 return 0; 318 #endif 319 320 if (!gd->have_console) 321 return 0; 322 323 if (gd->flags & GD_FLG_DEVINIT) { 324 /* Test the standard input */ 325 return ftstc(stdin); 326 } 327 328 /* Send directly to the handler */ 329 return serial_tstc(); 330 } 331 332 void putc(const char c) 333 { 334 #ifdef CONFIG_SILENT_CONSOLE 335 if (gd->flags & GD_FLG_SILENT) 336 return; 337 #endif 338 339 #ifdef CONFIG_DISABLE_CONSOLE 340 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 341 return; 342 #endif 343 344 if (!gd->have_console) 345 return; 346 347 if (gd->flags & GD_FLG_DEVINIT) { 348 /* Send to the standard output */ 349 fputc(stdout, c); 350 } else { 351 /* Send directly to the handler */ 352 serial_putc(c); 353 } 354 } 355 356 void puts(const char *s) 357 { 358 #ifdef CONFIG_SILENT_CONSOLE 359 if (gd->flags & GD_FLG_SILENT) 360 return; 361 #endif 362 363 #ifdef CONFIG_DISABLE_CONSOLE 364 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 365 return; 366 #endif 367 368 if (!gd->have_console) 369 return; 370 371 if (gd->flags & GD_FLG_DEVINIT) { 372 /* Send to the standard output */ 373 fputs(stdout, s); 374 } else { 375 /* Send directly to the handler */ 376 serial_puts(s); 377 } 378 } 379 380 int printf(const char *fmt, ...) 381 { 382 va_list args; 383 uint i; 384 char printbuffer[CONFIG_SYS_PBSIZE]; 385 386 if (!gd->have_console) 387 return 0; 388 389 va_start(args, fmt); 390 391 /* For this to work, printbuffer must be larger than 392 * anything we ever want to print. 393 */ 394 i = vsprintf(printbuffer, fmt, args); 395 va_end(args); 396 397 /* Print the string */ 398 puts(printbuffer); 399 return i; 400 } 401 402 int vprintf(const char *fmt, va_list args) 403 { 404 uint i; 405 char printbuffer[CONFIG_SYS_PBSIZE]; 406 407 if (!gd->have_console) 408 return 0; 409 410 /* For this to work, printbuffer must be larger than 411 * anything we ever want to print. 412 */ 413 i = vsprintf(printbuffer, fmt, args); 414 415 /* Print the string */ 416 puts(printbuffer); 417 return i; 418 } 419 420 /* test if ctrl-c was pressed */ 421 static int ctrlc_disabled = 0; /* see disable_ctrl() */ 422 static int ctrlc_was_pressed = 0; 423 int ctrlc(void) 424 { 425 if (!ctrlc_disabled && gd->have_console) { 426 if (tstc()) { 427 switch (getc()) { 428 case 0x03: /* ^C - Control C */ 429 ctrlc_was_pressed = 1; 430 return 1; 431 default: 432 break; 433 } 434 } 435 } 436 return 0; 437 } 438 439 /* pass 1 to disable ctrlc() checking, 0 to enable. 440 * returns previous state 441 */ 442 int disable_ctrlc(int disable) 443 { 444 int prev = ctrlc_disabled; /* save previous state */ 445 446 ctrlc_disabled = disable; 447 return prev; 448 } 449 450 int had_ctrlc (void) 451 { 452 return ctrlc_was_pressed; 453 } 454 455 void clear_ctrlc(void) 456 { 457 ctrlc_was_pressed = 0; 458 } 459 460 #ifdef CONFIG_MODEM_SUPPORT_DEBUG 461 char screen[1024]; 462 char *cursor = screen; 463 int once = 0; 464 inline void dbg(const char *fmt, ...) 465 { 466 va_list args; 467 uint i; 468 char printbuffer[CONFIG_SYS_PBSIZE]; 469 470 if (!once) { 471 memset(screen, 0, sizeof(screen)); 472 once++; 473 } 474 475 va_start(args, fmt); 476 477 /* For this to work, printbuffer must be larger than 478 * anything we ever want to print. 479 */ 480 i = vsprintf(printbuffer, fmt, args); 481 va_end(args); 482 483 if ((screen + sizeof(screen) - 1 - cursor) 484 < strlen(printbuffer) + 1) { 485 memset(screen, 0, sizeof(screen)); 486 cursor = screen; 487 } 488 sprintf(cursor, printbuffer); 489 cursor += strlen(printbuffer); 490 491 } 492 #else 493 inline void dbg(const char *fmt, ...) 494 { 495 } 496 #endif 497 498 /** U-Boot INIT FUNCTIONS *************************************************/ 499 500 struct stdio_dev *search_device(int flags, const char *name) 501 { 502 struct stdio_dev *dev; 503 504 dev = stdio_get_by_name(name); 505 506 if (dev && (dev->flags & flags)) 507 return dev; 508 509 return NULL; 510 } 511 512 int console_assign(int file, const char *devname) 513 { 514 int flag; 515 struct stdio_dev *dev; 516 517 /* Check for valid file */ 518 switch (file) { 519 case stdin: 520 flag = DEV_FLAGS_INPUT; 521 break; 522 case stdout: 523 case stderr: 524 flag = DEV_FLAGS_OUTPUT; 525 break; 526 default: 527 return -1; 528 } 529 530 /* Check for valid device name */ 531 532 dev = search_device(flag, devname); 533 534 if (dev) 535 return console_setfile(file, dev); 536 537 return -1; 538 } 539 540 /* Called before relocation - use serial functions */ 541 int console_init_f(void) 542 { 543 gd->have_console = 1; 544 545 #ifdef CONFIG_SILENT_CONSOLE 546 if (getenv("silent") != NULL) 547 gd->flags |= GD_FLG_SILENT; 548 #endif 549 550 return 0; 551 } 552 553 void stdio_print_current_devices(void) 554 { 555 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET 556 /* Print information */ 557 puts("In: "); 558 if (stdio_devices[stdin] == NULL) { 559 puts("No input devices available!\n"); 560 } else { 561 printf ("%s\n", stdio_devices[stdin]->name); 562 } 563 564 puts("Out: "); 565 if (stdio_devices[stdout] == NULL) { 566 puts("No output devices available!\n"); 567 } else { 568 printf ("%s\n", stdio_devices[stdout]->name); 569 } 570 571 puts("Err: "); 572 if (stdio_devices[stderr] == NULL) { 573 puts("No error devices available!\n"); 574 } else { 575 printf ("%s\n", stdio_devices[stderr]->name); 576 } 577 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */ 578 } 579 580 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV 581 /* Called after the relocation - use desired console functions */ 582 int console_init_r(void) 583 { 584 char *stdinname, *stdoutname, *stderrname; 585 struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL; 586 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE 587 int i; 588 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */ 589 #ifdef CONFIG_CONSOLE_MUX 590 int iomux_err = 0; 591 #endif 592 593 /* set default handlers at first */ 594 gd->jt[XF_getc] = serial_getc; 595 gd->jt[XF_tstc] = serial_tstc; 596 gd->jt[XF_putc] = serial_putc; 597 gd->jt[XF_puts] = serial_puts; 598 gd->jt[XF_printf] = serial_printf; 599 600 /* stdin stdout and stderr are in environment */ 601 /* scan for it */ 602 stdinname = getenv("stdin"); 603 stdoutname = getenv("stdout"); 604 stderrname = getenv("stderr"); 605 606 if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */ 607 inputdev = search_device(DEV_FLAGS_INPUT, stdinname); 608 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname); 609 errdev = search_device(DEV_FLAGS_OUTPUT, stderrname); 610 #ifdef CONFIG_CONSOLE_MUX 611 iomux_err = iomux_doenv(stdin, stdinname); 612 iomux_err += iomux_doenv(stdout, stdoutname); 613 iomux_err += iomux_doenv(stderr, stderrname); 614 if (!iomux_err) 615 /* Successful, so skip all the code below. */ 616 goto done; 617 #endif 618 } 619 /* if the devices are overwritten or not found, use default device */ 620 if (inputdev == NULL) { 621 inputdev = search_device(DEV_FLAGS_INPUT, "serial"); 622 } 623 if (outputdev == NULL) { 624 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial"); 625 } 626 if (errdev == NULL) { 627 errdev = search_device(DEV_FLAGS_OUTPUT, "serial"); 628 } 629 /* Initializes output console first */ 630 if (outputdev != NULL) { 631 /* need to set a console if not done above. */ 632 console_doenv(stdout, outputdev); 633 } 634 if (errdev != NULL) { 635 /* need to set a console if not done above. */ 636 console_doenv(stderr, errdev); 637 } 638 if (inputdev != NULL) { 639 /* need to set a console if not done above. */ 640 console_doenv(stdin, inputdev); 641 } 642 643 #ifdef CONFIG_CONSOLE_MUX 644 done: 645 #endif 646 647 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */ 648 649 stdio_print_current_devices(); 650 651 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE 652 /* set the environment variables (will overwrite previous env settings) */ 653 for (i = 0; i < 3; i++) { 654 setenv(stdio_names[i], stdio_devices[i]->name); 655 } 656 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */ 657 658 #if 0 659 /* If nothing usable installed, use only the initial console */ 660 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL)) 661 return 0; 662 #endif 663 return 0; 664 } 665 666 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */ 667 668 /* Called after the relocation - use desired console functions */ 669 int console_init_r(void) 670 { 671 struct stdio_dev *inputdev = NULL, *outputdev = NULL; 672 int i; 673 struct list_head *list = stdio_get_list(); 674 struct list_head *pos; 675 struct stdio_dev *dev; 676 677 #ifdef CONFIG_SPLASH_SCREEN 678 /* 679 * suppress all output if splash screen is enabled and we have 680 * a bmp to display. We redirect the output from frame buffer 681 * console to serial console in this case or suppress it if 682 * "silent" mode was requested. 683 */ 684 if (getenv("splashimage") != NULL) { 685 if (!(gd->flags & GD_FLG_SILENT)) 686 outputdev = search_device (DEV_FLAGS_OUTPUT, "serial"); 687 } 688 #endif 689 690 /* Scan devices looking for input and output devices */ 691 list_for_each(pos, list) { 692 dev = list_entry(pos, struct stdio_dev, list); 693 694 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) { 695 inputdev = dev; 696 } 697 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) { 698 outputdev = dev; 699 } 700 if(inputdev && outputdev) 701 break; 702 } 703 704 /* Initializes output console first */ 705 if (outputdev != NULL) { 706 console_setfile(stdout, outputdev); 707 console_setfile(stderr, outputdev); 708 #ifdef CONFIG_CONSOLE_MUX 709 console_devices[stdout][0] = outputdev; 710 console_devices[stderr][0] = outputdev; 711 #endif 712 } 713 714 /* Initializes input console */ 715 if (inputdev != NULL) { 716 console_setfile(stdin, inputdev); 717 #ifdef CONFIG_CONSOLE_MUX 718 console_devices[stdin][0] = inputdev; 719 #endif 720 } 721 722 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */ 723 724 stdio_print_current_devices(); 725 726 /* Setting environment variables */ 727 for (i = 0; i < 3; i++) { 728 setenv(stdio_names[i], stdio_devices[i]->name); 729 } 730 731 #if 0 732 /* If nothing usable installed, use only the initial console */ 733 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL)) 734 return 0; 735 #endif 736 737 return 0; 738 } 739 740 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */ 741