/* $Id: USBLCD.c,v 1.20 2004/01/09 04:16:06 reinelt Exp $ * * Driver for USBLCD (see http://www.usblcd.de) * * Copyright 2002 Robin Adams, Adams IT Services * * This driver is based on HD44780.c, which is * Copyright 1999, 2000 Michael Reinelt * * 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: USBLCD.c,v $ * Revision 1.20 2004/01/09 04:16:06 reinelt * added 'section' argument to cfg_get(), but NULLed it on all calls by now. * * Revision 1.19 2004/01/06 22:33:14 reinelt * Copyright statements cleaned up * * Revision 1.18 2003/10/05 17:58:50 reinelt * libtool junk; copyright messages cleaned up * * Revision 1.17 2003/09/11 04:09:53 reinelt * minor cleanups * * Revision 1.16 2003/09/10 03:48:23 reinelt * Icons for M50530, new processing scheme (Ticks.Text...) * * Revision 1.15 2003/09/09 11:47:47 reinelt * basic icon support for HD44780 * * Revision 1.14 2003/09/09 06:54:43 reinelt * new function 'cfg_number()' * * Revision 1.13 2003/09/09 05:30:34 reinelt * even more icons stuff * * Revision 1.12 2003/08/24 05:17:58 reinelt * liblcd4linux patch from Patrick Schemitz * * Revision 1.11 2003/08/16 07:31:35 reinelt * double buffering in all drivers * * Revision 1.10 2003/07/24 04:48:09 reinelt * 'soft clear' needed for virtual rows * * Revision 1.9 2003/04/04 06:01:59 reinelt * new parallel port abstraction scheme * * Revision 1.8 2003/02/22 07:53:10 reinelt * cfg_get(key,defval) * * Revision 1.7 2002/08/19 09:11:34 reinelt * changed HD44780 to use generic bar functions * * Revision 1.6 2002/08/19 07:52:19 reinelt * corrected type declaration of (*defchar)() * * Revision 1.5 2002/08/19 07:36:29 reinelt * * finished bar.c, USBLCD is the first driver that uses the generic bar functions * * Revision 1.4 2002/08/19 04:41:20 reinelt * introduced bar.c, moved bar stuff from display.h to bar.h * * Revision 1.3 2002/08/18 08:11:11 reinelt * USBLCD buffered I/O * * Revision 1.2 2002/08/17 14:14:21 reinelt * * USBLCD fixes * * Revision 1.0 2002/07/08 12:16:10 radams * * first version of the USBLCD driver * */ /* * * exported fuctions: * * struct LCD UDBLCD[] * */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include "debug.h" #include "cfg.h" #include "display.h" #include "icon.h" #include "bar.h" #define GET_HARD_VERSION 1 #define GET_DRV_VERSION 2 #define XRES 5 #define YRES 8 #define CHARS 8 static LCD Lcd; static char *Port=NULL; static int usblcd_file; static int Icons; static char *FrameBuffer1=NULL; static char *FrameBuffer2=NULL; static unsigned char *Buffer; static unsigned char *BufPtr; static void USBLCD_send () { // struct timeval now, end; // gettimeofday (&now, NULL); write(usblcd_file,Buffer,BufPtr-Buffer); // gettimeofday (&end, NULL); // debug ("send %d: %d usec (%d usec/byte)", BufPtr-Buffer, 1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec, (1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec)/(BufPtr-Buffer)); BufPtr=Buffer; } static void USBLCD_command (unsigned char cmd) { *BufPtr++='\0'; *BufPtr++=cmd; } static void USBLCD_write (char *string, int len) { while (len--) { if(*string==0) *BufPtr++=*string; *BufPtr++=*string++; } } static int USBLCD_open (void) { char buf[128]; int major,minor; usblcd_file=open(Port,O_WRONLY); if (usblcd_file==-1) { error ("USBLCD: open(%s) failed: %s", Port, strerror(errno)); return -1; } memset(buf,0,sizeof(buf)); if (ioctl(usblcd_file,GET_DRV_VERSION, buf)!=0) { error ("USBLCD: ioctl() failed, could not get Driver Version!"); return -2; } debug("Driver Version: %s",buf); if (sscanf(buf,"USBLCD Driver Version %d.%d",&major,&minor)!=2) { error("USBLCD: could not read Driver Version!"); return -4; } if (major!=1) { error("USBLCD: Driver Version not supported!"); return -4; } memset(buf,0,sizeof(buf)); if (ioctl(usblcd_file,GET_HARD_VERSION, buf)!=0) { error ("USBLCD: ioctl() failed, could not get Hardware Version!"); return -3; } debug("Hardware Version: %s",buf); if (sscanf(buf,"%d.%d",&major,&minor)!=2) { error("USBLCD: could not read Hardware Version!"); return -4; }; if (major!=1) { error("USBLCD: Hardware Version not supported!"); return -4; } BufPtr=Buffer; USBLCD_command (0x29); // 8 Bit mode, 1/16 duty cycle, 5x8 font USBLCD_command (0x08); // Display off, cursor off, blink off USBLCD_command (0x0c); // Display on, cursor off, blink off USBLCD_command (0x06); // curser moves to right, no shift return 0; } static void USBLCD_define_char (int ascii, char *buffer) { USBLCD_command (0x40|8*ascii); USBLCD_write (buffer, 8); } int USBLCD_clear (int full) { memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char)); icon_clear(); bar_clear(); if (full) { memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char)); USBLCD_command (0x01); // clear display } return 0; } int USBLCD_init (LCD *Self) { int rows=-1, cols=-1 ; char *port, *s; if (Port) { free(Port); Port=NULL; } if ((port=cfg_get(NULL, "Port", NULL))==NULL || *port=='\0') { error ("USBLCD: no 'Port' entry in %s", cfg_source()); return -1; } if (port[0]=='/') { Port=strdup(port); } else { Port=(char *)malloc(5/*/dev/ */+strlen(port)+1); sprintf(Port,"/dev/%s",port); } debug ("using device %s ", Port); s=cfg_get(NULL, "Size", NULL); if (s==NULL || *s=='\0') { error ("USBLCD: no 'Size' entry in %s", cfg_source()); return -1; } if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) { error ("USBLCD: bad size '%s'",s); return -1; } Self->rows=rows; Self->cols=cols; Lcd=*Self; // Init the command buffer Buffer = (char*)malloc(1024); if (Buffer==NULL) { error ("USBLCD: coommand buffer could not be allocated: malloc() failed"); return -1; } // Init the framebuffers FrameBuffer1 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); FrameBuffer2 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); if (FrameBuffer1==NULL || FrameBuffer2==NULL) { error ("USBLCD: framebuffer could not be allocated: malloc() failed"); return -1; } if (USBLCD_open()!=0) return -1; if (cfg_number(NULL, "Icons", 0, 0, CHARS, &Icons)<0) return -1; if (Icons>0) { debug ("reserving %d of %d user-defined characters for icons", Icons, CHARS); icon_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS, Icons, USBLCD_define_char); Self->icons=Icons; Lcd.icons=Icons; } bar_init(rows, cols, XRES, YRES, CHARS-Icons); bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank bar_add_segment(255,255,255,255); // ASCII 255 = block USBLCD_clear(1); USBLCD_send(); return 0; } void USBLCD_goto (int row, int col) { int pos=(row%2)*64+(row/2)*20+col; USBLCD_command (0x80|pos); } int USBLCD_put (int row, int col, char *text) { char *p=FrameBuffer1+row*Lcd.cols+col; char *t=text; while (*t && col++<=Lcd.cols) { *p++=*t++; } return 0; } int USBLCD_bar (int type, int row, int col, int max, int len1, int len2) { return bar_draw (type, row, col, max, len1, len2); } int USBLCD_icon (int num, int seq, int row, int col) { return icon_draw (num, seq, row, col); } int USBLCD_flush (void) { int row, col, pos1, pos2; int c, equal; bar_process(USBLCD_define_char); for (row=0; row2) break; } else { pos2=col; equal=0; } } USBLCD_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1); } } USBLCD_send(); memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char)); return 0; } int USBLCD_quit (void) { info("USBLCD: shutting down."); USBLCD_send(); debug ("closing port %s", Port); close(usblcd_file); if (Buffer) { free(Buffer); Buffer=NULL; } if (FrameBuffer1) { free(FrameBuffer1); FrameBuffer1=NULL; } if (FrameBuffer2) { free(FrameBuffer2); FrameBuffer2=NULL; } return 0; } LCD USBLCD[] = { { name: "USBLCD", rows: 0, cols: 0, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, icons: 0, gpos: 0, init: USBLCD_init, clear: USBLCD_clear, put: USBLCD_put, bar: USBLCD_bar, icon: USBLCD_icon, gpo: NULL, flush: USBLCD_flush, quit: USBLCD_quit }, { NULL } }; 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/* $Id: drv_generic_parport.c,v 1.13 2005/01/18 06:30:23 reinelt Exp $
 *
 * generic driver helper for serial and parport access
 *
 * Copyright (C) 1999, 2000 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * 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 1.13  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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <time.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.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 "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
    /* 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 ("%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:%s]<==>[PARPORT:STROBE]", Driver, name);
  } else if(strcasecmp(signal,"AUTOFD") == 0) {
    wire = PARPORT_CONTROL_AUTOFD;
    info ("%s: wiring: [DISPLAY:%s]<==>[PARPORT:AUTOFD]", Driver, name);
  } else if(strcasecmp(signal,"INIT") == 0) {
    wire = PARPORT_CONTROL_INIT;
    info ("%s: wiring: [DISPLAY:%s]<==>[PARPORT:INIT]", Driver, name);
  } else if(strcasecmp(signal,"SELECT") == 0) {
    wire = PARPORT_CONTROL_SELECT;
    info ("%s: wiring: [DISPLAY:%s]<==>[PARPORT:SELECT]", Driver, name);
  } else if(strcasecmp(signal,"GND") == 0) {
    wire = 0;
    info ("%s: wiring: [DISPLAY:%s]<==>[PARPORT:GND]", Driver, name);
  } else {
    error ("%s: unknown signal <%s> for wire <%s>", Driver, signal, name);
    error ("%s: should be STROBE, AUTOFD, INIT, SELECT 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 wire <%s>", Driver, val, name);
  }
  free (val);
  
  wire = drv_generic_parport_signal_ctrl (name, signal);
  
  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 wire <%s>", Driver, s, name);
    error ("%s: should be DB0..7 or GND", Driver);
    return 0xff;
  }
  free(s);
  if (w==0) {
    info ("%s: wiring: [DISPLAY:%s]<==>[PARPORT:GND]", Driver, name);
  } else {
    info ("%s: wiring: [DISPLAY:%s]<==>[PARPORT:DB%d]", Driver, name, w);
  }
  
  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 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 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 %cSELECT", 
	 control & PARPORT_CONTROL_STROBE ? '-':'+',
	 control & PARPORT_CONTROL_AUTOFD ? '-':'+',
	 control & PARPORT_CONTROL_INIT   ? '+':'-',
	 control & PARPORT_CONTROL_SELECT ? '-':'+');
  
}