/* $Id: drv_generic_parport.c,v 1.21 2006/02/25 13:36:33 geronet Exp $ * * generic driver helper for serial and parport access * * Copyright (C) 1999, 2000 Michael Reinelt * 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: drv_generic_parport.c,v $ * Revision 1.21 2006/02/25 13:36:33 geronet * updated indent.sh, applied coding style * * Revision 1.20 2005/12/12 05:52:03 reinelt * type of delays is 'unsigned long' * * Revision 1.19 2005/06/19 17:57:06 reinelt * cosmetics... * * Revision 1.18 2005/06/13 03:43:46 reinelt * undo PPEXCL activation... * * Revision 1.17 2005/06/13 03:38:25 reinelt * try PPEXCL again, but ignore result * * Revision 1.16 2005/05/08 04:32:44 reinelt * CodingStyle added and applied * * Revision 1.15 2005/05/05 08:36:12 reinelt * changed SELECT to SLCTIN * * Revision 1.14 2005/05/04 06:13:05 reinelt * parport_wire_status() added * * Revision 1.13 2005/01/18 06:30:23 reinelt * added (C) to all copyright statements * * Revision 1.12 2005/01/06 16:54:54 reinelt * M50530 fixes * * Revision 1.11 2004/09/18 15:58:57 reinelt * even more HD44780 cleanups, hardwiring for LCM-162 * * Revision 1.10 2004/09/18 09:48:29 reinelt * HD44780 cleanup and prepararation for I2C backend * LCM-162 submodel framework * * Revision 1.9 2004/09/18 08:22:59 reinelt * drv_generic_parport_status() to read status lines * * Revision 1.8 2004/06/26 12:04:59 reinelt * * uh-oh... the last CVS log message messed up things a lot... * * Revision 1.7 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 1.6 2004/06/20 10:09:55 reinelt * * 'const'ified the whole source * * Revision 1.5 2004/04/12 05:14:42 reinelt * another BIG FAT WARNING on the use of raw ports instead of ppdev * * Revision 1.4 2004/03/03 04:44:16 reinelt * changes (cosmetics?) to the big patch from Martin * hash patch un-applied * * Revision 1.3 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 1.2 2004/01/20 15:32:49 reinelt * first version of Next Generation HD44780 (untested! but it compiles...) * some cleanup in the other drivers * * Revision 1.1 2004/01/20 14:35:38 reinelt * drv_generic_parport added, code from parport.c * * Revision 1.2 2004/01/20 05:36:59 reinelt * moved text-display-specific stuff to drv_generic_text * moved all the bar stuff from drv_generic_bar to generic_text * * Revision 1.1 2004/01/20 04:51:39 reinelt * moved generic stuff from drv_MatrixOrbital to drv_generic * implemented new-stylish bars which are nearly finished * */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_SYS_IO_H #include #define WITH_OUTB #else #ifdef HAVE_ASM_IO_H #include #define WITH_OUTB #endif #endif #if defined (HAVE_LINUX_PARPORT_H) && defined (HAVE_LINUX_PPDEV_H) #define WITH_PPDEV #include #include #else #define PARPORT_CONTROL_STROBE 0x1 #define PARPORT_CONTROL_AUTOFD 0x2 #define PARPORT_CONTROL_INIT 0x4 #define PARPORT_CONTROL_SELECT 0x8 #define PARPORT_STATUS_ERROR 0x8 #define PARPORT_STATUS_SELECT 0x10 #define PARPORT_STATUS_PAPEROUT 0x20 #define PARPORT_STATUS_ACK 0x40 #define PARPORT_STATUS_BUSY 0x80 #endif #if !defined(WITH_OUTB) && !defined(WITH_PPDEV) #error neither outb() nor ppdev() possible #error cannot compile parallel port driver #endif #include "debug.h" #include "qprintf.h" #include "cfg.h" #include "udelay.h" #include "drv_generic_parport.h" static char *Driver = ""; static char *Section = ""; static unsigned short Port = 0; static char *PPdev = NULL; /* initial value taken from linux/parport_pc.c */ static unsigned char ctr = 0xc; #ifdef WITH_PPDEV static int PPfd = -1; #endif int drv_generic_parport_open(const char *section, const char *driver) { char *s, *e; Section = (char *) section; Driver = (char *) driver; udelay_init(); #ifndef WITH_PPDEV error("The files include/linux/parport.h and/or include/linux/ppdev.h"); error("were missing at compile time. Even if your system supports"); error("ppdev, it will not be used."); error("You *really* should install these files and recompile LCD4linux!"); #endif s = cfg_get(Section, "Port", NULL); if (s == NULL || *s == '\0') { error("%s: no '%s.Port' entry from %s", Driver, Section, cfg_source()); return -1; } PPdev = NULL; if ((Port = strtol(s, &e, 0)) == 0 || *e != '\0') { #ifdef WITH_PPDEV Port = 0; PPdev = s; #else error("%s: bad %s.Port '%s' from %s", Driver, Section, s, cfg_source()); free(s); return -1; #endif } #ifdef WITH_PPDEV if (PPdev) { info("%s: using ppdev %s", Driver, PPdev); PPfd = open(PPdev, O_RDWR); if (PPfd == -1) { error("%s: open(%s) failed: %s", Driver, PPdev, strerror(errno)); return -1; } #if 0 /* PPEXCL fails if someone else uses the port (e.g. lp.ko) */ if (ioctl(PPfd, PPEXCL)) { info("%s: ioctl(%s, PPEXCL) failed: %s", PPdev, Driver, strerror(errno)); info("%s: could not get exclusive access to %s.", Driver, PPdev); } else { info("%s: got exclusive access to %s.", Driver, PPdev); } #endif if (ioctl(PPfd, PPCLAIM)) { error("%s: ioctl(%s, PPCLAIM) failed: %d %s", Driver, PPdev, errno, strerror(errno)); return -1; } } else #endif { error("using raw port 0x%x (deprecated!)", Port); error("You *really* should change your setup and use ppdev!"); if ((Port + 3) <= 0x3ff) { if (ioperm(Port, 3, 1) != 0) { error("%s: ioperm(0x%x) failed: %s", Driver, Port, strerror(errno)); return -1; } } else { if (iopl(3) != 0) { error("%s: iopl(1) failed: %s", Driver, strerror(errno)); return -1; } } } return 0; } int drv_generic_parport_close(void) { #ifdef WITH_PPDEV if (PPdev) { debug("closing ppdev %s", PPdev); if (ioctl(PPfd, PPRELEASE)) { error("%s: ioctl(%s, PPRELEASE) failed: %s", Driver, PPdev, strerror(errno)); } if (close(PPfd) == -1) { error("%s: close(%s) failed: %s", Driver, PPdev, strerror(errno)); return -1; } free(PPdev); } else #endif { debug("closing raw port 0x%x", Port); if ((Port + 3) <= 0x3ff) { if (ioperm(Port, 3, 0) != 0) { error("%s: ioperm(0x%x) failed: %s", Driver, Port, strerror(errno)); return -1; } } else { if (iopl(0) != 0) { error("%s: iopl(0) failed: %s", Driver, strerror(errno)); return -1; } } } return 0; } static unsigned char drv_generic_parport_signal_ctrl(const char *name, const char *signal) { unsigned char wire; if (strcasecmp(signal, "STROBE") == 0) { wire = PARPORT_CONTROL_STROBE; info("%s: wiring: DISPLAY:%-9s - PARPORT:STROBE (Pin 1)", Driver, name); } else if (strcasecmp(signal, "AUTOFD") == 0) { wire = PARPORT_CONTROL_AUTOFD; info("%s: wiring: DISPLAY:%-9s - PARPORT:AUTOFD (Pin 14)", Driver, name); } else if (strcasecmp(signal, "INIT") == 0) { wire = PARPORT_CONTROL_INIT; info("%s: wiring: DISPLAY:%-9s - PARPORT:INIT (Pin 16)", Driver, name); } else if (strcasecmp(signal, "SLCTIN") == 0) { wire = PARPORT_CONTROL_SELECT; info("%s: wiring: DISPLAY:%-9s - PARPORT:SLCTIN (Pin 17)", Driver, name); } else if (strcasecmp(signal, "SELECT") == 0) { wire = PARPORT_CONTROL_SELECT; error("%s: SELECT is deprecated. Please use SLCTIN instead!", Driver); info("%s: wiring: DISPLAY:%-9s - PARPORT:SLCTIN (Pin 17)", Driver, name); } else if (strcasecmp(signal, "GND") == 0) { wire = 0; info("%s: wiring: DISPLAY:%-9s - PARPORT:GND", Driver, name); } else { error("%s: unknown signal <%s> for control line <%s>", Driver, signal, name); error("%s: should be STROBE, AUTOFD, INIT, SLCTIN or GND", Driver); return 0xff; } return wire; } unsigned char drv_generic_parport_wire_ctrl(const char *name, const char *deflt) { unsigned char wire; char key[256]; char *val; qprintf(key, sizeof(key), "Wire.%s", name); val = cfg_get(Section, key, deflt); wire = drv_generic_parport_signal_ctrl(name, val); free(val); return wire; } unsigned char drv_generic_parport_hardwire_ctrl(const char *name, const char *signal) { unsigned char wire; char key[256]; char *val; qprintf(key, sizeof(key), "Wire.%s", name); val = cfg_get(Section, key, ""); /* maybe warn the user */ if (*val != '\0' && strcasecmp(signal, val) != 0) { error("%s: ignoring configured signal <%s> for control line <%s>", Driver, val, name); } free(val); wire = drv_generic_parport_signal_ctrl(name, signal); return wire; } static unsigned char drv_generic_parport_signal_status(const char *name, const char *signal) { unsigned char wire; if (strcasecmp(signal, "ERROR") == 0) { wire = PARPORT_STATUS_ERROR; info("%s: wiring: DISPLAY:%-9s - PARPORT:ERROR (Pin 15)", Driver, name); } else if (strcasecmp(signal, "SELECT") == 0) { wire = PARPORT_STATUS_SELECT; info("%s: wiring: DISPLAY:%-9s - PARPORT:SELECT (Pin 13)", Driver, name); } else if (strcasecmp(signal, "PAPEROUT") == 0) { wire = PARPORT_STATUS_PAPEROUT; info("%s: wiring: DISPLAY:%-9s - PARPORT:PAPEROUT (Pin 12)", Driver, name); } else if (strcasecmp(signal, "ACK") == 0) { wire = PARPORT_STATUS_ACK; info("%s: wiring: DISPLAY:%-9s - PARPORT:ACK (Pin 10)", Driver, name); } else if (strcasecmp(signal, "BUSY") == 0) { wire = PARPORT_STATUS_BUSY; info("%s: wiring: DISPLAY:%-9s - PARPORT:BUSY (Pin 11)", Driver, name); } else if (strcasecmp(signal, "GND") == 0) { wire = 0; info("%s: wiring: DISPLAY:%-9s - PARPORT:GND", Driver, name); } else { error("%s: unknown signal <%s> for status line <%s>", Driver, signal, name); error("%s: should be ERROR, SELECT, PAPEROUT, ACK, BUSY or GND", Driver); return 0xff; } return wire; } unsigned char drv_generic_parport_wire_status(const char *name, const char *deflt) { unsigned char wire; char key[256]; char *val; qprintf(key, sizeof(key), "Wire.%s", name); val = cfg_get(Section, key, deflt); wire = drv_generic_parport_signal_status(name, val); free(val); return wire; } unsigned char drv_generic_parport_wire_data(const char *name, const char *deflt) { unsigned char w; char wire[256]; char *s; qprintf(wire, sizeof(wire), "Wire.%s", name); s = cfg_get(Section, wire, deflt); if (strlen(s) == 3 && strncasecmp(s, "DB", 2) == 0 && s[2] >= '0' && s[2] <= '7') { w = s[2] - '0'; } else if (strcasecmp(s, "GND") == 0) { w = 0; } else { error("%s: unknown signal <%s> for data line <%s>", Driver, s, name); error("%s: should be DB0..7 or GND", Driver); return 0xff; } free(s); if (w == 0) { info("%s: wiring: DISPLAY:%-9s - PARPORT:GND", Driver, name); } else { info("%s: wiring: DISPLAY:%-9s - PARPORT:DB%d (Pin %2d)", Driver, name, w, w + 2); } w = 1 << w; return w; } void drv_generic_parport_direction(const int direction) { #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPDATADIR, &direction); } else #endif { /* code stolen from linux/parport_pc.h */ ctr = (ctr & ~0x20) ^ (direction ? 0x20 : 0x00); outb(ctr, Port + 2); } } unsigned char drv_generic_parport_status(void) { unsigned char mask = PARPORT_STATUS_ERROR | PARPORT_STATUS_SELECT | PARPORT_STATUS_PAPEROUT | PARPORT_STATUS_ACK | PARPORT_STATUS_BUSY; unsigned char data; #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPRSTATUS, &data); } else #endif { data = inb(Port + 1); } /* clear unused bits */ data &= mask; return data; } void drv_generic_parport_control(const unsigned char mask, const unsigned char value) { unsigned char val; /* any signal affected? */ /* Note: this may happen in case a signal is hardwired to GND */ if (mask == 0) return; /* Strobe, Select and AutoFeed are inverted! */ val = mask & (value ^ (PARPORT_CONTROL_STROBE | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_AUTOFD)); #ifdef WITH_PPDEV if (PPdev) { struct ppdev_frob_struct frob; frob.mask = mask; frob.val = val; ioctl(PPfd, PPFCONTROL, &frob); } else #endif { /* code stolen from linux/parport_pc.h */ ctr = (ctr & ~mask) ^ val; outb(ctr, Port + 2); } } void drv_generic_parport_toggle(const unsigned char bits, const int level, const unsigned long delay) { unsigned char value1, value2; /* any signal affected? */ /* Note: this may happen in case a signal is hardwired to GND */ if (bits == 0) return; /* prepare value */ value1 = level ? bits : 0; value2 = level ? 0 : bits; /* Strobe, Select and AutoFeed are inverted! */ value1 = bits & (value1 ^ (PARPORT_CONTROL_STROBE | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_AUTOFD)); value2 = bits & (value2 ^ (PARPORT_CONTROL_STROBE | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_AUTOFD)); #ifdef WITH_PPDEV if (PPdev) { struct ppdev_frob_struct frob; frob.mask = bits; /* rise */ frob.val = value1; ioctl(PPfd, PPFCONTROL, &frob); /* pulse width */ ndelay(delay); /* lower */ frob.val = value2; ioctl(PPfd, PPFCONTROL, &frob); } else #endif { /* rise */ ctr = (ctr & ~bits) ^ value1; outb(ctr, Port + 2); /* pulse width */ ndelay(delay); /* lower */ ctr = (ctr & ~bits) ^ value2; outb(ctr, Port + 2); } } void drv_generic_parport_data(const unsigned char data) { #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPWDATA, &data); } else #endif { outb(data, Port); } } unsigned char drv_generic_parport_read(void) { unsigned char data; #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPRDATA, &data); } else #endif { data = inb(Port); } return data; } void drv_generic_parport_debug(void) { unsigned char control; #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPRCONTROL, &control); } else #endif { control = ctr; } debug("%cSTROBE %cAUTOFD %cINIT %cSLCTIN", control & PARPORT_CONTROL_STROBE ? '-' : '+', control & PARPORT_CONTROL_AUTOFD ? '-' : '+', control & PARPORT_CONTROL_INIT ? '+' : '-', control & PARPORT_CONTROL_SELECT ? '-' : '+'); } #n386'>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