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->flags & GD_FLG_DEVINIT) { 302 /* Get from the standard input */ 303 return fgetc(stdin); 304 } 305 306 /* Send directly to the handler */ 307 return serial_getc(); 308 } 309 310 int tstc(void) 311 { 312 #ifdef CONFIG_DISABLE_CONSOLE 313 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 314 return 0; 315 #endif 316 317 if (gd->flags & GD_FLG_DEVINIT) { 318 /* Test the standard input */ 319 return ftstc(stdin); 320 } 321 322 /* Send directly to the handler */ 323 return serial_tstc(); 324 } 325 326 void putc(const char c) 327 { 328 #ifdef CONFIG_SILENT_CONSOLE 329 if (gd->flags & GD_FLG_SILENT) 330 return; 331 #endif 332 333 #ifdef CONFIG_DISABLE_CONSOLE 334 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 335 return; 336 #endif 337 338 if (gd->flags & GD_FLG_DEVINIT) { 339 /* Send to the standard output */ 340 fputc(stdout, c); 341 } else { 342 /* Send directly to the handler */ 343 serial_putc(c); 344 } 345 } 346 347 void puts(const char *s) 348 { 349 #ifdef CONFIG_SILENT_CONSOLE 350 if (gd->flags & GD_FLG_SILENT) 351 return; 352 #endif 353 354 #ifdef CONFIG_DISABLE_CONSOLE 355 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 356 return; 357 #endif 358 359 if (gd->flags & GD_FLG_DEVINIT) { 360 /* Send to the standard output */ 361 fputs(stdout, s); 362 } else { 363 /* Send directly to the handler */ 364 serial_puts(s); 365 } 366 } 367 368 int printf(const char *fmt, ...) 369 { 370 va_list args; 371 uint i; 372 char printbuffer[CONFIG_SYS_PBSIZE]; 373 374 va_start(args, fmt); 375 376 /* For this to work, printbuffer must be larger than 377 * anything we ever want to print. 378 */ 379 i = vsprintf(printbuffer, fmt, args); 380 va_end(args); 381 382 /* Print the string */ 383 puts(printbuffer); 384 return i; 385 } 386 387 int vprintf(const char *fmt, va_list args) 388 { 389 uint i; 390 char printbuffer[CONFIG_SYS_PBSIZE]; 391 392 /* For this to work, printbuffer must be larger than 393 * anything we ever want to print. 394 */ 395 i = vsprintf(printbuffer, fmt, args); 396 397 /* Print the string */ 398 puts(printbuffer); 399 return i; 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, const 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, const 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 */ 723