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 = vscnprintf(printbuffer, sizeof(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 = vscnprintf(printbuffer, sizeof(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 #ifdef CONFIG_PRE_CONSOLE_BUFFER 333 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ) 334 335 static void pre_console_putc(const char c) 336 { 337 char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR; 338 339 buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c; 340 } 341 342 static void pre_console_puts(const char *s) 343 { 344 while (*s) 345 pre_console_putc(*s++); 346 } 347 348 static void print_pre_console_buffer(void) 349 { 350 unsigned long i = 0; 351 char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR; 352 353 if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ) 354 i = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ; 355 356 while (i < gd->precon_buf_idx) 357 putc(buffer[CIRC_BUF_IDX(i++)]); 358 } 359 #else 360 static inline void pre_console_putc(const char c) {} 361 static inline void pre_console_puts(const char *s) {} 362 static inline void print_pre_console_buffer(void) {} 363 #endif 364 365 void putc(const char c) 366 { 367 #ifdef CONFIG_SILENT_CONSOLE 368 if (gd->flags & GD_FLG_SILENT) 369 return; 370 #endif 371 372 #ifdef CONFIG_DISABLE_CONSOLE 373 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 374 return; 375 #endif 376 377 if (!gd->have_console) 378 return pre_console_putc(c); 379 380 if (gd->flags & GD_FLG_DEVINIT) { 381 /* Send to the standard output */ 382 fputc(stdout, c); 383 } else { 384 /* Send directly to the handler */ 385 serial_putc(c); 386 } 387 } 388 389 void puts(const char *s) 390 { 391 #ifdef CONFIG_SILENT_CONSOLE 392 if (gd->flags & GD_FLG_SILENT) 393 return; 394 #endif 395 396 #ifdef CONFIG_DISABLE_CONSOLE 397 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 398 return; 399 #endif 400 401 if (!gd->have_console) 402 return pre_console_puts(s); 403 404 if (gd->flags & GD_FLG_DEVINIT) { 405 /* Send to the standard output */ 406 fputs(stdout, s); 407 } else { 408 /* Send directly to the handler */ 409 serial_puts(s); 410 } 411 } 412 413 int printf(const char *fmt, ...) 414 { 415 va_list args; 416 uint i; 417 char printbuffer[CONFIG_SYS_PBSIZE]; 418 419 #ifndef CONFIG_PRE_CONSOLE_BUFFER 420 if (!gd->have_console) 421 return 0; 422 #endif 423 424 va_start(args, fmt); 425 426 /* For this to work, printbuffer must be larger than 427 * anything we ever want to print. 428 */ 429 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); 430 va_end(args); 431 432 /* Print the string */ 433 puts(printbuffer); 434 return i; 435 } 436 437 int vprintf(const char *fmt, va_list args) 438 { 439 uint i; 440 char printbuffer[CONFIG_SYS_PBSIZE]; 441 442 #ifndef CONFIG_PRE_CONSOLE_BUFFER 443 if (!gd->have_console) 444 return 0; 445 #endif 446 447 /* For this to work, printbuffer must be larger than 448 * anything we ever want to print. 449 */ 450 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); 451 452 /* Print the string */ 453 puts(printbuffer); 454 return i; 455 } 456 457 /* test if ctrl-c was pressed */ 458 static int ctrlc_disabled = 0; /* see disable_ctrl() */ 459 static int ctrlc_was_pressed = 0; 460 int ctrlc(void) 461 { 462 if (!ctrlc_disabled && gd->have_console) { 463 if (tstc()) { 464 switch (getc()) { 465 case 0x03: /* ^C - Control C */ 466 ctrlc_was_pressed = 1; 467 return 1; 468 default: 469 break; 470 } 471 } 472 } 473 return 0; 474 } 475 476 /* pass 1 to disable ctrlc() checking, 0 to enable. 477 * returns previous state 478 */ 479 int disable_ctrlc(int disable) 480 { 481 int prev = ctrlc_disabled; /* save previous state */ 482 483 ctrlc_disabled = disable; 484 return prev; 485 } 486 487 int had_ctrlc (void) 488 { 489 return ctrlc_was_pressed; 490 } 491 492 void clear_ctrlc(void) 493 { 494 ctrlc_was_pressed = 0; 495 } 496 497 #ifdef CONFIG_MODEM_SUPPORT_DEBUG 498 char screen[1024]; 499 char *cursor = screen; 500 int once = 0; 501 inline void dbg(const char *fmt, ...) 502 { 503 va_list args; 504 uint i; 505 char printbuffer[CONFIG_SYS_PBSIZE]; 506 507 if (!once) { 508 memset(screen, 0, sizeof(screen)); 509 once++; 510 } 511 512 va_start(args, fmt); 513 514 /* For this to work, printbuffer must be larger than 515 * anything we ever want to print. 516 */ 517 i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args); 518 va_end(args); 519 520 if ((screen + sizeof(screen) - 1 - cursor) 521 < strlen(printbuffer) + 1) { 522 memset(screen, 0, sizeof(screen)); 523 cursor = screen; 524 } 525 sprintf(cursor, printbuffer); 526 cursor += strlen(printbuffer); 527 528 } 529 #else 530 inline void dbg(const char *fmt, ...) 531 { 532 } 533 #endif 534 535 /** U-Boot INIT FUNCTIONS *************************************************/ 536 537 struct stdio_dev *search_device(int flags, const char *name) 538 { 539 struct stdio_dev *dev; 540 541 dev = stdio_get_by_name(name); 542 543 if (dev && (dev->flags & flags)) 544 return dev; 545 546 return NULL; 547 } 548 549 int console_assign(int file, const char *devname) 550 { 551 int flag; 552 struct stdio_dev *dev; 553 554 /* Check for valid file */ 555 switch (file) { 556 case stdin: 557 flag = DEV_FLAGS_INPUT; 558 break; 559 case stdout: 560 case stderr: 561 flag = DEV_FLAGS_OUTPUT; 562 break; 563 default: 564 return -1; 565 } 566 567 /* Check for valid device name */ 568 569 dev = search_device(flag, devname); 570 571 if (dev) 572 return console_setfile(file, dev); 573 574 return -1; 575 } 576 577 /* Called before relocation - use serial functions */ 578 int console_init_f(void) 579 { 580 gd->have_console = 1; 581 582 #ifdef CONFIG_SILENT_CONSOLE 583 if (getenv("silent") != NULL) 584 gd->flags |= GD_FLG_SILENT; 585 #endif 586 587 print_pre_console_buffer(); 588 589 return 0; 590 } 591 592 void stdio_print_current_devices(void) 593 { 594 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET 595 /* Print information */ 596 puts("In: "); 597 if (stdio_devices[stdin] == NULL) { 598 puts("No input devices available!\n"); 599 } else { 600 printf ("%s\n", stdio_devices[stdin]->name); 601 } 602 603 puts("Out: "); 604 if (stdio_devices[stdout] == NULL) { 605 puts("No output devices available!\n"); 606 } else { 607 printf ("%s\n", stdio_devices[stdout]->name); 608 } 609 610 puts("Err: "); 611 if (stdio_devices[stderr] == NULL) { 612 puts("No error devices available!\n"); 613 } else { 614 printf ("%s\n", stdio_devices[stderr]->name); 615 } 616 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */ 617 } 618 619 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV 620 /* Called after the relocation - use desired console functions */ 621 int console_init_r(void) 622 { 623 char *stdinname, *stdoutname, *stderrname; 624 struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL; 625 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE 626 int i; 627 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */ 628 #ifdef CONFIG_CONSOLE_MUX 629 int iomux_err = 0; 630 #endif 631 632 /* set default handlers at first */ 633 gd->jt[XF_getc] = serial_getc; 634 gd->jt[XF_tstc] = serial_tstc; 635 gd->jt[XF_putc] = serial_putc; 636 gd->jt[XF_puts] = serial_puts; 637 gd->jt[XF_printf] = serial_printf; 638 639 /* stdin stdout and stderr are in environment */ 640 /* scan for it */ 641 stdinname = getenv("stdin"); 642 stdoutname = getenv("stdout"); 643 stderrname = getenv("stderr"); 644 645 if (OVERWRITE_CONSOLE == 0) { /* if not overwritten by config switch */ 646 inputdev = search_device(DEV_FLAGS_INPUT, stdinname); 647 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname); 648 errdev = search_device(DEV_FLAGS_OUTPUT, stderrname); 649 #ifdef CONFIG_CONSOLE_MUX 650 iomux_err = iomux_doenv(stdin, stdinname); 651 iomux_err += iomux_doenv(stdout, stdoutname); 652 iomux_err += iomux_doenv(stderr, stderrname); 653 if (!iomux_err) 654 /* Successful, so skip all the code below. */ 655 goto done; 656 #endif 657 } 658 /* if the devices are overwritten or not found, use default device */ 659 if (inputdev == NULL) { 660 inputdev = search_device(DEV_FLAGS_INPUT, "serial"); 661 } 662 if (outputdev == NULL) { 663 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial"); 664 } 665 if (errdev == NULL) { 666 errdev = search_device(DEV_FLAGS_OUTPUT, "serial"); 667 } 668 /* Initializes output console first */ 669 if (outputdev != NULL) { 670 /* need to set a console if not done above. */ 671 console_doenv(stdout, outputdev); 672 } 673 if (errdev != NULL) { 674 /* need to set a console if not done above. */ 675 console_doenv(stderr, errdev); 676 } 677 if (inputdev != NULL) { 678 /* need to set a console if not done above. */ 679 console_doenv(stdin, inputdev); 680 } 681 682 #ifdef CONFIG_CONSOLE_MUX 683 done: 684 #endif 685 686 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */ 687 688 stdio_print_current_devices(); 689 690 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE 691 /* set the environment variables (will overwrite previous env settings) */ 692 for (i = 0; i < 3; i++) { 693 setenv(stdio_names[i], stdio_devices[i]->name); 694 } 695 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */ 696 697 #if 0 698 /* If nothing usable installed, use only the initial console */ 699 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL)) 700 return 0; 701 #endif 702 return 0; 703 } 704 705 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */ 706 707 /* Called after the relocation - use desired console functions */ 708 int console_init_r(void) 709 { 710 struct stdio_dev *inputdev = NULL, *outputdev = NULL; 711 int i; 712 struct list_head *list = stdio_get_list(); 713 struct list_head *pos; 714 struct stdio_dev *dev; 715 716 #ifdef CONFIG_SPLASH_SCREEN 717 /* 718 * suppress all output if splash screen is enabled and we have 719 * a bmp to display. We redirect the output from frame buffer 720 * console to serial console in this case or suppress it if 721 * "silent" mode was requested. 722 */ 723 if (getenv("splashimage") != NULL) { 724 if (!(gd->flags & GD_FLG_SILENT)) 725 outputdev = search_device (DEV_FLAGS_OUTPUT, "serial"); 726 } 727 #endif 728 729 /* Scan devices looking for input and output devices */ 730 list_for_each(pos, list) { 731 dev = list_entry(pos, struct stdio_dev, list); 732 733 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) { 734 inputdev = dev; 735 } 736 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) { 737 outputdev = dev; 738 } 739 if(inputdev && outputdev) 740 break; 741 } 742 743 /* Initializes output console first */ 744 if (outputdev != NULL) { 745 console_setfile(stdout, outputdev); 746 console_setfile(stderr, outputdev); 747 #ifdef CONFIG_CONSOLE_MUX 748 console_devices[stdout][0] = outputdev; 749 console_devices[stderr][0] = outputdev; 750 #endif 751 } 752 753 /* Initializes input console */ 754 if (inputdev != NULL) { 755 console_setfile(stdin, inputdev); 756 #ifdef CONFIG_CONSOLE_MUX 757 console_devices[stdin][0] = inputdev; 758 #endif 759 } 760 761 gd->flags |= GD_FLG_DEVINIT; /* device initialization completed */ 762 763 stdio_print_current_devices(); 764 765 /* Setting environment variables */ 766 for (i = 0; i < 3; i++) { 767 setenv(stdio_names[i], stdio_devices[i]->name); 768 } 769 770 #if 0 771 /* If nothing usable installed, use only the initial console */ 772 if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL)) 773 return 0; 774 #endif 775 776 return 0; 777 } 778 779 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */ 780