/* $Id: plugin_i2c_sensors.c,v 1.23 2005/04/01 05:16:04 reinelt Exp $ * * I2C sensors plugin * * Copyright (C) 2003, 2004 Xavier Vello * Copyright (C) 2004 The LCD4Linux Team * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: plugin_i2c_sensors.c,v $ * Revision 1.23 2005/04/01 05:16:04 reinelt * moved plugin init stuff to a seperate function called on first use * * Revision 1.22 2005/01/18 06:30:23 reinelt * added (C) to all copyright statements * * Revision 1.21 2004/06/26 12:05:00 reinelt * * uh-oh... the last CVS log message messed up things a lot... * * Revision 1.20 2004/06/26 09:27:21 reinelt * * added '-W' to CFLAGS * changed all C++ comments to C ones * cleaned up a lot of signed/unsigned mistakes * * Revision 1.19 2004/06/20 10:09:56 reinelt * * 'const'ified the whole source * * Revision 1.18 2004/06/17 06:23:43 reinelt * * hash handling rewritten to solve performance issues * * Revision 1.17 2004/06/05 14:56:48 reinelt * * Cwlinux splash screen fixed * USBLCD splash screen fixed * plugin_i2c qprintf("%f") replaced with snprintf() * * Revision 1.16 2004/06/01 06:45:30 reinelt * * some Fixme's processed * documented some code * * Revision 1.15 2004/05/31 21:05:13 reinelt * * fixed lots of bugs in the Cwlinux driver * do not emit EAGAIN error on the first retry * made plugin_i2c_sensors a bit less 'chatty' * moved init and exit functions to the bottom of plugin_pop3 * * Revision 1.14 2004/05/09 05:41:42 reinelt * * i2c fix for kernel 2.6.5 (temp_input1 vs. temp1_input) from Xavier * * Revision 1.13 2004/03/03 03:47:04 reinelt * big patch from Martin Hejl: * - use qprintf() where appropriate * - save CPU cycles on gettimeofday() * - add quit() functions to free allocated memory * - fixed lots of memory leaks * * Revision 1.12 2004/02/16 08:19:44 reinelt * i2c_sensors patch from Xavier * * Revision 1.11 2004/02/15 21:43:43 reinelt * T6963 driver nearly finished * framework for graphic displays done * i2c_sensors patch from Xavier * some more old generation files removed * * Revision 1.10 2004/02/14 12:07:27 nicowallmeier * minor bugfix * * Revision 1.9 2004/02/14 11:56:17 reinelt * M50530 driver ported * changed lots of 'char' to 'unsigned char' * * Revision 1.8 2004/02/14 10:09:50 reinelt * I2C Sensors for 2.4 kernels (/proc instead of /sysfs) * * Revision 1.7 2004/01/30 20:57:56 reinelt * HD44780 patch from Martin Hejl * dmalloc integrated * * Revision 1.6 2004/01/30 07:12:35 reinelt * HD44780 busy-flag support from Martin Hejl * loadavg() uClibc replacement from Martin Heyl * round() uClibc replacement from Martin Hejl * warning in i2c_sensors fixed * * Revision 1.5 2004/01/29 05:55:30 reinelt * check for /sys mounted * * Revision 1.4 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.3 2004/01/27 08:13:39 reinelt * ported PPP token to plugin_ppp * * Revision 1.2 2004/01/27 05:06:10 reinelt * i2c update from Xavier * * Revision 1.1 2004/01/10 17:36:56 reinelt * * I2C Sensors plugin from Xavier added * */ /* * exported functions: * * int plugin_init_i2c_sensors (void) * adds function i2c_sensors() to retrieve informations from * the i2c sensors via sysfs or procfs interface * * -- WARNING -- * This plugin should detect where your sensors are at startup. * If you can't get any token to work, ensure you don't get * an error message with "lcd4linux -Fvvv". * * If so, try to force the path to your sensors in the conf like this : * for sysfs: i2c_sensors-path '/sys/bus/i2c/devices/0-6000/' * for procfs: i2c_sensors-path '/proc/sys/dev/sensors/via686a-isa-6000' * /!\ these path are for my system, change the last dir according to yours */ /* * Available tokens : # represents an int from 1 to 3 (or more) * temp_input# -> temperature of sensor # (in °C) * temp_max# and temp_hyst# -> max and min of sensor # * in_input#, in_min# and in_max# -> voltages * fan_input# -> speed (in RPM) of fan # * fan_min# and fan_div# * * Tokens avaible only via sysfs if suported by your sensors: * curr_input#, curr_min# and curr_max# -> value of current (in amps) * pwm# * temp_crit# -> critical value of sensor # * vid -> cpu core voltage * and maybe others * (see /usr/src/linux/Documentation/i2c/sysfs-interface on linux 2.6) */ #include "config.h" #include #include #include #include #include #include #include #include "debug.h" #include "plugin.h" #include "cfg.h" #include "hash.h" #include "qprintf.h" #ifdef WITH_DMALLOC #include #endif static char *path=NULL; static HASH I2Csensors; static const char *procfs_tokens[4][3] = { {"temp_hyst", "temp_max", "temp_input"}, /* for temp# */ {"in_min", "in_max", "in_input"}, /* for in# */ {"fan_div1", "fan_div2", "fan_div3"}, /* for fan_div */ {"fan_min", "fan_input", ""} /* for fan# */ }; static int (*parse_i2c_sensors)(const char *key); /***********************************************\ * Parsing for new 2.6 kernels 'sysfs' interface * \***********************************************/ static int parse_i2c_sensors_sysfs(const char *key) { char val[32]; char buffer[32]; char file[64]; FILE *stream; strcpy(file, path); strcat(file, key); stream=fopen(file, "r"); if (stream==NULL) { error ("i2c_sensors: fopen(%s) failed: %s", file, strerror(errno)); return -1; } fgets (buffer, sizeof(buffer), stream); fclose (stream); if (!buffer) { error ("i2c_sensors: %s empty ?!", file); return -1; } /* now the formating stuff, depending on the file : */ /* Some values must be divided by 1000, the others */ /* are parsed directly (we just remove the \n). */ if (!strncmp(key, "temp", 4) || !strncmp(key, "curr", 4) || !strncmp(key, "in", 2) || !strncmp(key, "vid", 3)) { snprintf(val, sizeof(val), "%f", strtod(buffer, NULL) / 1000.0); } else { qprintf(val, sizeof(val), "%s", buffer); /* we supress this nasty \n at the end */ val[strlen(val)-1]='\0'; } hash_put (&I2Csensors, key, val); return 0; } /************************************************\ * Parsing for old 2.4 kernels 'procfs' interface * \************************************************/ static int parse_i2c_sensors_procfs(const char *key) { char file[64]; FILE *stream; char buffer[32]; char *value; char *running; int pos=0; const char delim[3]=" \n"; char final_key[32]; const char *number = &key[strlen(key)-1]; int tokens_index; /* debug("%s -> %s", key, number); */ strcpy(file, path); if (!strncmp(key, "temp_", 5)) { tokens_index=0; strcat(file, "temp"); strcat(file, number); } else if (!strncmp(key, "in_", 3)) { tokens_index=1; strcat(file, "in"); strcat(file, number); } else if (!strncmp(key, "fan_div", 7)) { tokens_index=2; strcat(file, "fan_div"); number = ""; } else if (!strncmp(key, "fan_", 4)) { tokens_index=3; strcat(file, "fan"); strcat(file, number); } else { return -1; } stream=fopen(file, "r"); if (stream==NULL) { error ("i2c_sensors: fopen(%s) failed: %s", file, strerror(errno)); return -1; } fgets (buffer, sizeof(buffer), stream); fclose (stream); if (!buffer) { error ("i2c_sensors: %s empty ?!",file); return -1; } running=strdupa(buffer); while(1) { value = strsep (&running, delim); /* debug("%s pos %i -> %s", file, pos , value); */ if (!value || !strcmp(value, "")) { /* debug("%s pos %i -> BREAK", file, pos); */ break; } else { qprintf (final_key, sizeof(final_key), "%s%s", procfs_tokens[tokens_index][pos], number); /* debug ("%s -> %s", final_key, value); */ hash_put (&I2Csensors, final_key, value); pos++; } } return 0; } /*****************************************\ * Common functions (path search and init) * \*****************************************/ static void my_i2c_sensors_path(const char *method) { struct dirent *dir; struct dirent *file; const char *base; char dname[64]; DIR *fd1; DIR *fd2; int done; if (!strcmp(method, "sysfs")) { base="/sys/bus/i2c/devices/"; } else if (!strcmp(method, "procfs")) { base="/proc/sys/dev/sensors/"; /*base="/sensors_2.4/"; // fake dir to test without rebooting 2.4 ;) */ } else { return; } fd1 = opendir(base); if (!fd1) { return; } while((dir = readdir(fd1))) { /* Skip non-directories and '.' and '..' */ if ((dir->d_type!=DT_DIR && dir->d_type!=DT_LNK) || strcmp(dir->d_name, "." )==0 || strcmp(dir->d_name, "..")==0) { continue; } /* dname is the absolute path */ strcpy(dname, base); strcat(dname, dir->d_name); strcat(dname, "/"); fd2 = opendir(dname); done = 0; while((file = readdir(fd2))) { /* FIXME : do all sensors have a temp_input1 ? */ if (!strcmp(file->d_name, "temp_input1") || !strcmp(file->d_name, "temp1_input") || !strcmp(file->d_name, "temp1")) { path = realloc(path, strlen(dname)+1); strcpy(path, dname); done=1; break; } } closedir(fd2); if (done) break; } closedir(fd1); } static int configure_i2c_sensors (void) { static int configured = 0; char *path_cfg; if (configured != 0) return configured; path_cfg = cfg_get(NULL, "i2c_sensors-path", ""); if (path_cfg == NULL || *path_cfg == '\0') { /* debug("No path to i2c sensors found in the conf, calling my_i2c_sensors_path()"); */ my_i2c_sensors_path("sysfs"); if (!path) my_i2c_sensors_path("procfs"); if (!path) { error("i2c_sensors: unable to autodetect i2c sensors!"); configured = -1; return configured; } debug("using i2c sensors at %s (autodetected)", path); } else { if (path_cfg[strlen(path_cfg)-1] != '/') { /* the headless user forgot the trailing slash :/ */ error("i2c_sensors: please add a trailing slash to %s from %s", path_cfg, cfg_source()); path_cfg = realloc(path_cfg, strlen(path_cfg)+2); strcat(path_cfg, "/"); } debug("using i2c sensors at %s (from %s)", path, cfg_source()); path = realloc(path, strlen(path_cfg)+1); strcpy(path, path_cfg); } if (path_cfg) free(path_cfg); /* we activate the function only if there's a possibly path found */ if (strncmp(path, "/sys", 4)==0) { parse_i2c_sensors = parse_i2c_sensors_sysfs; } else if (strncmp(path, "/proc", 5)==0) { parse_i2c_sensors = parse_i2c_sensors_procfs; } else { error("i2c_sensors: unknown path %s, should start with /sys or /proc"); configured = -1; return configured; } hash_create(&I2Csensors); configured = 1; return configured; } void my_i2c_sensors(RESULT *result, RESULT *arg) { int age; char *key; char *val; if (configure_i2c_sensors() < 0) { SetResult(&result, R_STRING, "??"); return; } key=R2S(arg); age=hash_age(&I2Csensors, key); if (age<0 || age>250) { parse_i2c_sensors(key); } val=hash_get(&I2Csensors, key, NULL); if (val) { SetResult(&result, R_STRING, val); } else { SetResult(&result, R_STRING, "??"); } } int plugin_init_i2c_sensors (void) { AddFunction ("i2c_sensors", 1, my_i2c_sensors); return 0; } void plugin_exit_i2c_sensors(void) { hash_destroy(&I2Csensors); } d='n306' href='#n306'>306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815