diff options
Diffstat (limited to 'parport.c')
| -rw-r--r-- | parport.c | 478 |
1 files changed, 0 insertions, 478 deletions
diff --git a/parport.c b/parport.c deleted file mode 100644 index d84dee4..0000000 --- a/parport.c +++ /dev/null @@ -1,478 +0,0 @@ -/* $Id: parport.c,v 1.13 2004/01/13 08:18:20 reinelt Exp $ - * - * generic parallel port handling - * - * Copyright 2003 Michael Reinelt <reinelt@eunet.at> - * - * 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: parport.c,v $ - * Revision 1.13 2004/01/13 08:18:20 reinelt - * timer queues added - * liblcd4linux deactivated turing transformation to new layout - * - * Revision 1.12 2004/01/09 04:16:06 reinelt - * added 'section' argument to cfg_get(), but NULLed it on all calls by now. - * - * Revision 1.11 2003/10/08 14:21:10 reinelt - * Changelog; small type in parport.c - * - * Revision 1.10 2003/10/05 17:58:50 reinelt - * libtool junk; copyright messages cleaned up - * - * Revision 1.9 2003/10/03 03:53:12 reinelt - * compile error in parport fixed (thanks to Andrew from FilmCan) - * - * Revision 1.8 2003/09/09 06:54:43 reinelt - * new function 'cfg_number()' - * - * Revision 1.7 2003/08/24 05:17:58 reinelt - * liblcd4linux patch from Patrick Schemitz - * - * Revision 1.6 2003/08/22 03:45:09 reinelt - * bug in parallel port code fixed, more icons stuff - * - * Revision 1.5 2003/08/19 05:23:55 reinelt - * HD44780 dual-controller patch from Jesse Brook Kovach - * - * Revision 1.4 2003/08/16 07:31:35 reinelt - * double buffering in all drivers - * - * Revision 1.3 2003/08/15 07:54:07 reinelt - * HD44780 4 bit mode implemented - * - * Revision 1.2 2003/04/07 06:03:05 reinelt - * further parallel port abstraction - * - * Revision 1.1 2003/04/04 06:02:03 reinelt - * new parallel port abstraction scheme - * - */ - -/* - * exported functions: - * - * int parport_open (void) - * reads 'Port' entry from config and opens - * the parallel port - * returns 0 if ok, -1 on failure - * - * int parport_close (void) - * closes parallel port - * returns 0 if ok, -1 on failure - * - * unsigned char parport_wire_ctrl (char *name, char *deflt) - * reads wiring for one control signal from config - * returns PARPORT_CONTROL_* or 255 on error - * - * unsigned char parport_wire_data (char *name, char *deflt) - * reads wiring for one data signal from config - * returns 1<<bitpos or 255 on error - * - * void parport_direction (int direction) - * 0 - write to parport - * 1 - read from parport - * - * void parport_control (unsigned char mask, unsigned char value) - * frobs control line and takes care of inverted signals - * - * void parport_toggle (unsigned char bit, int level, int delay) - * toggles the line <bit> to <level> for <delay> nanoseconds - * - * void parport_data (unsigned char value) - * put data bits on DB1..DB8 - * - * unsigned char parport_read (void) - * reads a byte from the parallel port - * - * void parport_debug(void) - * prints status of control lines - */ - - -#include "config.h" - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <time.h> -#include <errno.h> -#include <sys/ioctl.h> - - -#ifdef HAVE_SYS_IO_H -#include <sys/io.h> -#define WITH_OUTB -#else -#ifdef HAVE_ASM_IO_H -#include <asm/io.h> -#define WITH_OUTB -#endif -#endif - -#if defined (HAVE_LINUX_PARPORT_H) && defined (HAVE_LINUX_PPDEV_H) -#define WITH_PPDEV -#include <linux/parport.h> -#include <linux/ppdev.h> -#else -#define PARPORT_CONTROL_STROBE 0x1 -#define PARPORT_CONTROL_AUTOFD 0x2 -#define PARPORT_CONTROL_INIT 0x4 -#define PARPORT_CONTROL_SELECT 0x8 -#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 "cfg.h" -#include "udelay.h" -#include "parport.h" - - -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 parport_open (void) -{ - char *s, *e; - -#ifdef USE_OLD_UDELAY - if (cfg_number(NULL, "Delay", 0, 1, 1000000000, &loops_per_usec)<0) return -1; -#else - udelay_init(); -#endif - - s=cfg_get (NULL, "Port", NULL); - if (s==NULL || *s=='\0') { - error ("parport: no 'Port' entry in %s", cfg_source()); - return -1; - } - PPdev=NULL; - if ((Port=strtol(s, &e, 0))==0 || *e!='\0') { -#ifdef WITH_PPDEV - Port=0; - PPdev=s; -#else - error ("parport: bad Port '%s' in %s", s, cfg_source()); - return -1; -#endif - } - - -#ifdef WITH_PPDEV - - if (PPdev) { - debug ("using ppdev %s", PPdev); - PPfd=open(PPdev, O_RDWR); - if (PPfd==-1) { - error ("parport: open(%s) failed: %s", PPdev, strerror(errno)); - return -1; - } - -#if 0 - // Fixme: this always fails here... - if (ioctl(PPfd, PPEXCL)) { - debug ("ioctl(%s, PPEXCL) failed: %s", PPdev, strerror(errno)); - } else { - debug ("ioctl(%s, PPEXCL) succeded."); - } -#endif - - if (ioctl(PPfd, PPCLAIM)) { - error ("parport: ioctl(%s, PPCLAIM) failed: %d %s", PPdev, errno, strerror(errno)); - return -1; - } - } else - -#endif - - { - debug ("using raw port 0x%x", Port); - if ((Port+3)<=0x3ff) { - if (ioperm(Port, 3, 1)!=0) { - error ("parport: ioperm(0x%x) failed: %s", Port, strerror(errno)); - return -1; - } - } else { - if (iopl(3)!=0) { - error ("parport: iopl(1) failed: %s", strerror(errno)); - return -1; - } - } - } - return 0; -} - - -int parport_close (void) -{ -#ifdef WITH_PPDEV - if (PPdev) { - debug ("closing ppdev %s", PPdev); - if (ioctl(PPfd, PPRELEASE)) { - error ("parport: ioctl(%s, PPRELEASE) failed: %s", PPdev, strerror(errno)); - } - if (close(PPfd)==-1) { - error ("parport: close(%s) failed: %s", PPdev, strerror(errno)); - return -1; - } - } else -#endif - { - debug ("closing raw port 0x%x", Port); - if ((Port+3)<=0x3ff) { - if (ioperm(Port, 3, 0)!=0) { - error ("parport: ioperm(0x%x) failed: %s", Port, strerror(errno)); - return -1; - } - } else { - if (iopl(0)!=0) { - error ("parport: iopl(0) failed: %s", strerror(errno)); - return -1; - } - } - } - return 0; -} - - -unsigned char parport_wire_ctrl (char *name, unsigned char *deflt) -{ - unsigned char w; - char wire[256]; - char *s; - - snprintf (wire, sizeof(wire), "Wire.%s", name); - s=cfg_get (NULL, wire, deflt); - if (strcasecmp(s,"STROBE")==0) { - w=PARPORT_CONTROL_STROBE; - } else if(strcasecmp(s,"AUTOFD")==0) { - w=PARPORT_CONTROL_AUTOFD; - } else if(strcasecmp(s,"INIT")==0) { - w=PARPORT_CONTROL_INIT; - } else if(strcasecmp(s,"SELECT")==0) { - w=PARPORT_CONTROL_SELECT; - } else if(strcasecmp(s,"GND")==0) { - w=0; - } else { - error ("parport: unknown signal <%s> for wire <%s>", s, name); - error (" should be STROBE, AUTOFD, INIT, SELECT or GND"); - return 0xff; - } - - if (w&PARPORT_CONTROL_STROBE) { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:STROBE]", name); - } - if (w&PARPORT_CONTROL_AUTOFD) { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:AUTOFD]", name); - } - if (w&PARPORT_CONTROL_INIT) { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:INIT]", name); - } - if (w&PARPORT_CONTROL_SELECT) { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:SELECT]", name); - } - if (w==0) { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:GND]", name); - } - - return w; -} - - -unsigned char parport_wire_data (char *name, unsigned char *deflt) -{ - unsigned char w; - char wire[256]; - char *s; - - snprintf (wire, sizeof(wire), "Wire.%s", name); - s=cfg_get (NULL, 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 ("parport: unknown signal <%s> for wire <%s>", s, name); - error (" should be DB0..7 or GND"); - return 0xff; - } - - if (w==0) { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:GND]", name); - } else { - info ("wiring: [DISPLAY:%s]<==>[PARPORT:DB%d]", name, w); - } - - w=1<<w; - - return w; -} - - -void parport_direction (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); - } -} - - -void parport_control (unsigned char mask, unsigned char value) -{ - // 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! - value = 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=value; - ioctl (PPfd, PPFCONTROL, &frob); - } else -#endif - { - // code stolen from linux/parport_pc.h - ctr = (ctr & ~mask) ^ value; - outb (ctr, Port+2); - } -} - - -void parport_toggle (unsigned char bits, int level, int 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 parport_data (unsigned char data) -{ -#ifdef WITH_PPDEV - if (PPdev) { - ioctl(PPfd, PPWDATA, &data); - } else -#endif - { - outb (data, Port); - } -} - -unsigned char parport_read (void) -{ - unsigned char data; - -#ifdef WITH_PPDEV - if (PPdev) { - ioctl (PPfd, PPRDATA, &data); - } else -#endif - { - data=inb (Port); - } - return data; -} - - -void parport_debug(void) -{ - unsigned char control; - -#ifdef WITH_PPDEV - if (PPdev) { - ioctl (PPfd, PPRCONTROL, &control); - } else -#endif - { - control=ctr; - } - - debug ("%cSTROBE %cAUTOFD %cINIT %cSELECT", - control & PARPORT_CONTROL_STROBE ? '-':'+', - control & PARPORT_CONTROL_AUTOFD ? '-':'+', - control & PARPORT_CONTROL_INIT ? '+':'-', - control & PARPORT_CONTROL_SELECT ? '-':'+'); - -} |