[lcd4linux @ 2005-05-31 20:42:54 by lfcorreia]

new file: lcd4linux_i2c.h
avoid the problems detecting the proper I2C kernel include files

rearrange all the other autoconf stuff to remove I2C detection

new method by Paul Kamphuis to write to the I2C device

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@556 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

8 files changed, 2408 insertions, 1819 deletions

diff --git a/config.h.in b/config.h.in
index 6381155..d008bc9 100644
--- a/config.h.in
+++ b/config.h.in
@@ -55,12 +55,6 @@
 /* Define to 1 if you have the <linux/dvb/frontend.h> header file. */
 #undef HAVE_LINUX_DVB_FRONTEND_H
 
-/* Define to 1 if you have the <linux/i2c-dev.h> header file. */
-#undef HAVE_LINUX_I2C_DEV_H
-
-/* Define to 1 if you have the <linux/i2c.h> header file. */
-#undef HAVE_LINUX_I2C_H
-
 /* Define to 1 if you have the <linux/isdn.h> header file. */
 #undef HAVE_LINUX_ISDN_H
 
diff --git a/configure b/configure
index d01a3ab..3c7b98e 100755
--- a/configure
+++ b/configure
@@ -5452,76 +5452,7 @@ done
 
 
 # check for i2c
-
-
-
-for ac_header in linux/compiler.h linux/i2c.h linux/i2c-dev.h
-do
-as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
-echo "$as_me:$LINENO: checking for $ac_header" >&5
-echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
-if eval "test \"\${$as_ac_Header+set}\" = set"; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-#if HAVE_LINUX_COMPILER_H
-#include <linux/compiler.h>
-# endif
-#if HAVE_LINUX_I2C_H
-#include <linux/i2c.h>
-# endif
-
-
-#include <$ac_header>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
-  (eval $ac_compile) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest.$ac_objext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  eval "$as_ac_Header=yes"
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-eval "$as_ac_Header=no"
-fi
-rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
-echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
-if test `eval echo '${'$as_ac_Header'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
- has_i2c="true"
-else
-  has_i2c="false";break
-fi
-
-done
+has_i2c="true"
 
 
 # check for serdisplib
@@ -6062,7 +5993,7 @@ TEXT="no"
 GRAPHIC="no"
 IMAGE="no"
 
-# generiv I/O drivers
+# generic I/O drivers
 PARPORT="no"
 SERIAL="no"
 I2C="no"
@@ -6374,18 +6305,12 @@ fi
 
 # generic i2c driver
 if test "$I2C" = "yes"; then
-   if test "$has_i2c" = true; then
       DRIVERS="$DRIVERS drv_generic_i2c.o"
 
 cat >>confdefs.h <<\_ACEOF
 #define WITH_I2C 1
 _ACEOF
 
-   else
-      I2C="no"
-      { echo "$as_me:$LINENO: WARNING: I2C include files not found: I2C bus driver disabled" >&5
-echo "$as_me: WARNING: I2C include files not found: I2C bus driver disabled" >&2;}
-   fi
 fi
 
 
diff --git a/configure.in b/configure.in
index a2d9822..8c42187 100644
--- a/configure.in
+++ b/configure.in
@@ -54,23 +54,9 @@ AC_CHECK_HEADERS(gd/gd.h gd.h, [has_gd="true";break], [has_gd="false"])
 # check for usb.h
 AC_CHECK_HEADERS(usb.h, [has_usb="true"], [has_usb="false"])
 
-# check for i2c
-AC_CHECK_HEADERS(linux/compiler.h linux/i2c.h linux/i2c-dev.h,[has_i2c="true"],[has_i2c="false";break],[
-#if HAVE_LINUX_COMPILER_H
-#include <linux/compiler.h>
-# endif
-#if HAVE_LINUX_I2C_H
-#include <linux/i2c.h>
-# endif
-])
-
 # check for serdisplib
 AC_CHECK_HEADERS(serdisplib/serdisp.h, [has_serdisplib="true"], [has_serdisplib="false"])
 
-# check for python
-sinclude(python.m4)
-AC_PYTHON_DEVEL
-
 # drivers
 sinclude(drivers.m4)
 
diff --git a/drivers.m4 b/drivers.m4
index ee5da93..0a6100e 100644
--- a/drivers.m4
+++ b/drivers.m4
@@ -372,13 +372,8 @@ fi
 
 # generic i2c driver
 if test "$I2C" = "yes"; then
-   if test "$has_i2c" = true; then
-      DRIVERS="$DRIVERS drv_generic_i2c.o"
-      AC_DEFINE(WITH_I2C, 1, [I2C bus driver])
-   else
-      I2C="no"
-      AC_MSG_WARN(I2C include files not found: I2C bus driver disabled)
-   fi   
+   DRIVERS="$DRIVERS drv_generic_i2c.o"
+   AC_DEFINE(WITH_I2C, 1, [I2C bus driver])
 fi
 
 
diff --git a/drv_HD44780.c b/drv_HD44780.c
index e032a5d..91215c3 100644
--- a/drv_HD44780.c
+++ b/drv_HD44780.c
@@ -1,1492 +1,1497 @@
-/* $Id: drv_HD44780.c,v 1.49 2005/05/08 04:32:44 reinelt Exp $
- *
- * new style driver for HD44780-based displays
- *
- * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>
- * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
- *
- * Support for I2C bus
- * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>
- *
- * Modification for 4-Bit mode
- * Copyright (C) 2003 Martin Hejl (martin@hejl.de)
- *
- * Modification for 2nd controller support
- * Copyright (C) 2003 Jesse Brook Kovach <jkovach@wam.umd.edu>
- *
- * 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.
- *
- *
+/* $Id: drv_HD44780.c,v 1.50 2005/05/31 20:42:55 lfcorreia Exp $

+ *

+ * new style driver for HD44780-based displays

+ *

+ * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>

+ * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>

+ *

+ * Support for I2C bus

+ * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>

+ *

+ * Modification for 4-Bit mode

+ * Copyright (C) 2003 Martin Hejl (martin@hejl.de)

+ *

+ * Modification for 2nd controller support

+ * Copyright (C) 2003 Jesse Brook Kovach <jkovach@wam.umd.edu>

+ *

+ * 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_HD44780.c,v $
- * Revision 1.49  2005/05/08 04:32:44  reinelt
- * CodingStyle added and applied
- *
- * Revision 1.48  2005/05/05 08:36:12  reinelt
- * changed SELECT to SLCTIN
- *
- * Revision 1.47  2005/03/28 22:29:23  reinelt
- * HD44780 multiple displays patch from geronet
- *
- * Revision 1.46  2005/03/28 19:39:23  reinelt
- * HD44780/I2C patch from Luis merged (still does not work for me)
- *
- * Revision 1.45  2005/03/25 15:44:43  reinelt
- * HD44780 Backlight fixed (thanks to geronet)
- *
- * Revision 1.44  2005/01/29 09:30:56  reinelt
- * minor HD44780 cleanups
- *
- * Revision 1.43  2005/01/18 06:30:23  reinelt
- * added (C) to all copyright statements
- *
- * Revision 1.42  2005/01/17 06:38:48  reinelt
- * info about backlight and brightness
- *
- * Revision 1.41  2005/01/17 06:29:24  reinelt
- * added software-controlled backlight support to HD44780
- *
- * Revision 1.40  2004/11/30 05:01:25  reinelt
- * removed compiler warnings for deactivated i2c bus
- *
- * Revision 1.39  2004/10/17 09:24:31  reinelt
- * I2C support for HD44780 displays by Luis (does not work by now)
- *
- * Revision 1.38  2004/09/19 09:31:19  reinelt
- * HD44780 busy flag checking improved: fall back to busy-waiting if too many errors occur
- *
- * Revision 1.37  2004/09/18 15:58:57  reinelt
- * even more HD44780 cleanups, hardwiring for LCM-162
- *
- * Revision 1.36  2004/09/18 10:57:29  reinelt
- * more parport/i2c cleanups
- *
- * Revision 1.35  2004/09/18 09:48:29  reinelt
- * HD44780 cleanup and prepararation for I2C backend
- * LCM-162 submodel framework
- *
- * Revision 1.34  2004/09/18 08:22:59  reinelt
- * drv_generic_parport_status() to read status lines
- *
- * Revision 1.33  2004/08/29 13:03:41  reinelt
- *
- * added RouterBoard driver
- *
- * Revision 1.32  2004/06/26 12:04:59  reinelt
- *
- * uh-oh... the last CVS log message messed up things a lot...
- *
- * Revision 1.31  2004/06/26 09:27:20  reinelt
- *
- * added '-W' to CFLAGS
- * changed all C++ comments to C ones
- * cleaned up a lot of signed/unsigned mistakes
- *
- * Revision 1.30  2004/06/20 10:09:54  reinelt
- *
- * 'const'ified the whole source
- *
- * Revision 1.29  2004/06/06 06:51:59  reinelt
- *
- * do not display end splash screen if quiet=1
- *
- * Revision 1.28  2004/06/05 06:41:39  reinelt
- *
- * chancged splash screen again
- *
- * Revision 1.27  2004/06/05 06:13:11  reinelt
- *
- * splash screen for all text-based display drivers
- *
- * Revision 1.26  2004/06/02 10:09:22  reinelt
- *
- * splash screen for HD44780
- *
- * Revision 1.25  2004/06/02 09:41:19  reinelt
- *
- * prepared support for startup splash screen
- *
- * Revision 1.24  2004/06/01 06:45:29  reinelt
- *
- * some Fixme's processed
- * documented some code
- *
- * Revision 1.23  2004/05/31 05:38:02  reinelt
- *
- * fixed possible bugs with user-defined chars (clear high bits)
- * thanks to Andy Baxter for debugging the MilfordInstruments driver!
- *
- * Revision 1.22  2004/05/27 03:39:47  reinelt
- *
- * changed function naming scheme to plugin::function
- *
- * Revision 1.21  2004/05/26 11:37:36  reinelt
- *
- * Curses driver ported.
- *
- * Revision 1.20  2004/05/22 04:23:49  reinelt
- *
- * removed 16*x fix again (next time think before commit :-)
- *
- * Revision 1.19  2004/05/22 04:21:02  reinelt
- *
- * fix for display RAM layout on 16x4 displays (thanks to toxicated101)
- *
- * Revision 1.18  2004/03/20 07:31:32  reinelt
- * support for HD66712 (which has a different RAM layout)
- * further threading development
- *
- * Revision 1.17  2004/03/19 09:17:46  reinelt
- *
- * removed the extra 'goto' function, row and col are additional parameters
- * of the write() function now.
- *
- * Revision 1.16  2004/03/11 06:39:58  reinelt
- * big patch from Martin:
- * - reuse filehandles
- * - memory leaks fixed
- * - earlier busy-flag checking with HD44780
- * - reuse memory for strings in RESULT and hash
- * - netdev_fast to wavid time-consuming regex
- *
- * Revision 1.15  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 1.14  2004/03/01 04:29:51  reinelt
- * cfg_number() returns -1 on error, 0 if value not found (but default val used),
- *  and 1 if value was used from the configuration.
- * HD44780 driver adopted to new cfg_number()
- * Crystalfontz 631 driver nearly finished
- *
- * Revision 1.13  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 1.12  2004/02/14 11:56:17  reinelt
- * M50530 driver ported
- * changed lots of 'char' to 'unsigned char'
- *
- * Revision 1.11  2004/02/04 19:10:51  reinelt
- * Crystalfontz driver nearly finished
- *
- * Revision 1.10  2004/02/02 05:22:16  reinelt
- * Brightness fpr Noritake Displays avaliable as a plugin
- *
- * Revision 1.9  2004/02/01 11:51:22  hejl
- * Fixes for busy flag
- *
- * Revision 1.8  2004/02/01 08:05:12  reinelt
- * Crystalfontz 633 extensions (CRC checking and stuff)
- * Models table for HD44780
- * Noritake VFD BVrightness patch from Bill Paxton
- *
- * Revision 1.7  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 1.6  2004/01/29 04:40:02  reinelt
- * every .c file includes "config.h" now
- *
- * Revision 1.5  2004/01/23 07:04:17  reinelt
- * icons finished!
- *
- * Revision 1.4  2004/01/23 04:53:48  reinelt
- * icon widget added (not finished yet!)
- *
- * Revision 1.3  2004/01/22 07:57:45  reinelt
- * several bugs fixed where segfaulting on layout>display
- * Crystalfontz driver optimized, 632 display already works
- *
- * Revision 1.2  2004/01/21 06:39:27  reinelt
- * HD44780 missed the "clear display' sequence
- * asc255bug handling added
- * HD44780 tested, works here!
- *
- * Revision 1.1  2004/01/20 15:32:49  reinelt
- * first version of Next Generation HD44780 (untested! but it compiles...)
- * some cleanup in the other drivers
- *
- */
-
-/* 
- *
- * exported fuctions:
- *
- * struct DRIVER drv_HD44780
- *
- */
-
-#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 <sys/time.h>
-#include <sys/ioctl.h>
-
-#include "debug.h"
-#include "cfg.h"
-#include "udelay.h"
-#include "qprintf.h"
-#include "timer.h"
-#include "plugin.h"
-#include "widget.h"
-#include "widget_text.h"
-#include "widget_icon.h"
-#include "widget_bar.h"
-#include "drv.h"
-#include "drv_generic_text.h"
-#include "drv_generic_parport.h"
-
-#ifdef WITH_I2C
-#include "drv_generic_i2c.h"
-#endif
-
-static char Name[] = "HD44780";
-
-static int Bus;
-static int Model;
-static int Capabilities;
-
-
-/* low level communication timings [nanoseconds]
- * as these values differ from spec to spec,
- * we use the worst-case values.
- */
-
-#define T_CYCLE 1000		/* Enable cycle time */
-#define T_PW     450		/* Enable pulse width */
-#define T_AS      60		/* Address setup time */
-#define T_H       40		/* Data hold time */
-#define T_AH      20		/* Address hold time */
-
-
-/* HD44780 execution timings [microseconds]
- * as these values differ from spec to spec,
- * we use the worst-case values.
- */
-
-#define T_INIT1 4100		/* first init sequence:  4.1 msec */
-#define T_INIT2  100		/* second init sequence: 100 usec */
-#define T_EXEC    80		/* normal execution time */
-#define T_WRCG   120		/* CG RAM Write */
-#define T_CLEAR 2250		/* Clear Display */
-
-
-static int Bits = 0;
-static int numControllers = 0;
-static int allControllers = 0;
-static int currController = 0;
-
-/* size of every single controller */
-static int CROWS[4];
-static int CCOLS[4];
-
-static unsigned char SIGNAL_RW;
-static unsigned char SIGNAL_RS;
-static unsigned char SIGNAL_ENABLE;
-static unsigned char SIGNAL_ENABLE2;
-static unsigned char SIGNAL_ENABLE3;
-static unsigned char SIGNAL_ENABLE4;
-static unsigned char SIGNAL_BACKLIGHT;
-static unsigned char SIGNAL_GPO;
-
-/* maximum time to wait for the busy-flag (in usec) */
-#define MAX_BUSYFLAG_WAIT 10000
-
-/* maximum busy flag errors before falling back to busy-waiting */
-#define MAX_BUSYFLAG_ERRORS 20
-
-/* flag for busy-waiting vs. busy flag checking */
-static int UseBusy = 0;
-
-
-/* Fixme: GPO's not yet implemented */
-static int GPOS;
-/* static int GPO=0; */
-
-
-typedef struct {
-    int type;
-    char *name;
-    int capabilities;
-} MODEL;
-
-#define CAP_PARPORT    (1<<0)
-#define CAP_I2C        (1<<1)
-#define CAP_GPO        (1<<2)
-#define CAP_BACKLIGHT  (1<<3)
-#define CAP_BRIGHTNESS (1<<4)
-#define CAP_BUSY4BIT   (1<<5)
-#define CAP_HD66712    (1<<6)
-#define CAP_LCM162     (1<<7)
-
-#define BUS_PP  CAP_PARPORT
-#define BUS_I2C CAP_I2C
-
-
-static MODEL Models[] = {
-    {0x01, "generic", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT},
-    {0x02, "Noritake", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BRIGHTNESS},
-    {0x03, "Soekris", CAP_PARPORT | CAP_BUSY4BIT},
-    {0x04, "HD66712", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT | CAP_HD66712},
-    {0x05, "LCM-162", CAP_PARPORT | CAP_LCM162},
-    {0xff, "Unknown", 0}
-};
-
-
-/****************************************/
-/***  generic functions               ***/
-/****************************************/
-
-static int (*drv_HD_load) (const char *section);
-static void (*drv_HD_command) (const unsigned char controller, const unsigned char cmd, const int delay);
-static void (*drv_HD_data) (const unsigned char controller, const char *string, const int len, const int delay);
-static void (*drv_HD_stop) (void);
-
-
-
-/****************************************/
-/***  parport dependant functions     ***/
-/****************************************/
-
-static void drv_HD_PP_busy(const int controller)
-{
-    static unsigned int errors = 0;
-
-    unsigned char enable;
-    unsigned char data = 0xFF;
-    unsigned char busymask;
-    unsigned char ctrlmask;
-    unsigned int counter;
-
-    if (Bits == 8) {
-	busymask = 0x80;
-    } else {
-	/* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD
-	 * (and consequently, DB3 on the partport is mapped to DB7 on the LCD)
-	 * we need to listen for DB3 on the parport to go low
-	 */
-	busymask = 0x08;
-    }
-
-    ctrlmask = 0x08;
-    while (ctrlmask > 0) {
-
-	if (controller & ctrlmask) {
-
-	    enable = 0;
-	    if (ctrlmask & 0x01)
-		enable = SIGNAL_ENABLE;
-	    else if (ctrlmask & 0x02)
-		enable = SIGNAL_ENABLE2;
-	    else if (ctrlmask & 0x04)
-		enable = SIGNAL_ENABLE3;
-	    else if (ctrlmask & 0x08)
-		enable = SIGNAL_ENABLE4;
-
-	    /* set data-lines to input */
-	    drv_generic_parport_direction(1);
-
-	    if (Bits == 8) {
-		/* Set RW, clear RS */
-		drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RW);
-	    } else {
-		drv_generic_parport_data(SIGNAL_RW);
-	    }
-
-	    /* Address set-up time */
-	    ndelay(T_AS);
-
-	    /* rise ENABLE */
-	    if (Bits == 8) {
-		drv_generic_parport_control(enable, enable);
-	    } else {
-		drv_generic_parport_data(SIGNAL_RW | enable);
-	    }
-
-	    counter = 0;
-	    while (1) {
-		/* read the busy flag */
-		data = drv_generic_parport_read();
-		if ((data & busymask) == 0) {
-		    errors = 0;
-		    break;
-		}
-
-		/* make sure we don't wait forever
-		 * - but only check after 5 iterations
-		 * that way, we won't slow down normal mode
-		 * (where we don't need the timeout anyway) 
-		 */
-		counter++;
-
-		if (counter >= 5) {
-		    struct timeval now, end;
-
-		    if (counter == 5) {
-			/* determine the time when the timeout has expired */
-			gettimeofday(&end, NULL);
-			end.tv_usec += MAX_BUSYFLAG_WAIT;
-			while (end.tv_usec > 1000000) {
-			    end.tv_usec -= 1000000;
-			    end.tv_sec++;
-			}
-		    }
-
-		    /* get the current time */
-		    gettimeofday(&now, NULL);
-		    if (now.tv_sec == end.tv_sec ? now.tv_usec >= end.tv_usec : now.tv_sec >= end.tv_sec) {
-			error("%s: timeout waiting for busy flag on controller %x (%x)", Name, ctrlmask, data);
-			if (++errors >= MAX_BUSYFLAG_ERRORS) {
-			    error("%s: too many busy flag failures, turning off busy flag checking.", Name);
-			    UseBusy = 0;
-			}
-			break;
-		    }
-		}
-	    }
-
-	    /* RS=low, RW=low, EN=low */
-	    if (Bits == 8) {
-		/* Lower EN */
-		drv_generic_parport_control(enable, 0);
-
-		/* Address hold time */
-		ndelay(T_AH);
-
-		drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
-	    } else {
-		/* Lower EN */
-		drv_generic_parport_data(SIGNAL_RW);
-		ndelay(T_AH);
-		drv_generic_parport_data(0);
-	    }
-
-	    /* set data-lines to output */
-	    drv_generic_parport_direction(0);
-	}
-	ctrlmask >>= 1;
-    }
-}
-
-
-static void drv_HD_PP_nibble(const unsigned char controller, const unsigned char nibble)
-{
-    unsigned char enable;
-
-    /* enable signal: 'controller' is a bitmask */
-    /* bit n .. send to controller #n */
-    /* so we can send a byte to more controllers at the same time! */
-    enable = 0;
-    if (controller & 0x01)
-	enable |= SIGNAL_ENABLE;
-    if (controller & 0x02)
-	enable |= SIGNAL_ENABLE2;
-    if (controller & 0x04)
-	enable |= SIGNAL_ENABLE3;
-    if (controller & 0x08)
-	enable |= SIGNAL_ENABLE4;
-
-    /* clear ENABLE */
-    /* put data on DB1..DB4 */
-    /* nibble already contains RS bit! */
-    drv_generic_parport_data(nibble);
-
-    /* Address set-up time */
-    ndelay(T_AS);
-
-    /* rise ENABLE */
-    drv_generic_parport_data(nibble | enable);
-
-    /* Enable pulse width */
-    ndelay(T_PW);
-
-    /* lower ENABLE */
-    drv_generic_parport_data(nibble);
-}
-
-
-static void drv_HD_PP_byte(const unsigned char controller, const unsigned char data, const unsigned char RS)
-{
-    /* send high nibble of the data */
-    drv_HD_PP_nibble(controller, ((data >> 4) & 0x0f) | RS);
-
-    /* Make sure we honour T_CYCLE */
-    ndelay(T_CYCLE - T_AS - T_PW);
-
-    /* send low nibble of the data */
-    drv_HD_PP_nibble(controller, (data & 0x0f) | RS);
-}
-
-
-static void drv_HD_PP_command(const unsigned char controller, const unsigned char cmd, const int delay)
-{
-    unsigned char enable;
-
-    if (UseBusy)
-	drv_HD_PP_busy(controller);
-
-    if (Bits == 8) {
-
-	/* enable signal: 'controller' is a bitmask */
-	/* bit n .. send to controller #n */
-	/* so we can send a byte to more controllers at the same time! */
-	enable = 0;
-	if (controller & 0x01)
-	    enable |= SIGNAL_ENABLE;
-	if (controller & 0x02)
-	    enable |= SIGNAL_ENABLE2;
-	if (controller & 0x04)
-	    enable |= SIGNAL_ENABLE3;
-	if (controller & 0x08)
-	    enable |= SIGNAL_ENABLE4;
-
-	/* put data on DB1..DB8 */
-	drv_generic_parport_data(cmd);
-
-	/* clear RW and RS */
-	drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
-
-	/* Address set-up time */
-	ndelay(T_AS);
-
-	/* send command */
-	drv_generic_parport_toggle(enable, 1, T_PW);
-
-    } else {
-
-	drv_HD_PP_byte(controller, cmd, 0);
-
-    }
-
-    /* wait for command completion */
-    if (!UseBusy)
-	udelay(delay);
-
-}
-
-
-static void drv_HD_PP_data(const unsigned char controller, const char *string, const int len, const int delay)
-{
-    int l = len;
-    unsigned char enable;
-
-    /* sanity check */
-    if (len <= 0)
-	return;
-
-    if (Bits == 8) {
-
-	/* enable signal: 'controller' is a bitmask */
-	/* bit n .. send to controller #n */
-	/* so we can send a byte to more controllers at the same time! */
-	enable = 0;
-	if (controller & 0x01)
-	    enable |= SIGNAL_ENABLE;
-	if (controller & 0x02)
-	    enable |= SIGNAL_ENABLE2;
-	if (controller & 0x04)
-	    enable |= SIGNAL_ENABLE3;
-	if (controller & 0x08)
-	    enable |= SIGNAL_ENABLE4;
-
-	if (!UseBusy) {
-	    /* clear RW, set RS */
-	    drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
-	    /* Address set-up time */
-	    ndelay(T_AS);
-	}
-
-	while (l--) {
-
-	    if (UseBusy) {
-		drv_HD_PP_busy(controller);
-		/* clear RW, set RS */
-		drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
-		/* Address set-up time */
-		ndelay(T_AS);
-	    }
-
-	    /* put data on DB1..DB8 */
-	    drv_generic_parport_data(*(string++));
-
-	    /* send command */
-	    drv_generic_parport_toggle(enable, 1, T_PW);
-
-	    /* wait for command completion */
-	    if (!UseBusy)
-		udelay(delay);
-	}
-
-    } else {			/* 4 bit mode */
-
-	while (l--) {
-	    if (UseBusy)
-		drv_HD_PP_busy(controller);
-
-	    /* send data with RS enabled */
-	    drv_HD_PP_byte(controller, *(string++), SIGNAL_RS);
-
-	    /* wait for command completion */
-	    if (!UseBusy)
-		udelay(delay);
-	}
-    }
-}
-
-
-static int drv_HD_PP_load(const char *section)
-{
-    if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
-	return -1;
-
-    if (Bits != 4 && Bits != 8) {
-	error("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source());
-	return -1;
-    }
-
-    /* LCM-162 only supports 8-bit-mode */
-    if (Capabilities & CAP_LCM162 && Bits != 8) {
-	error("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits);
-	Bits = 8;
-    }
-    info("%s: using %d bit mode", Name, Bits);
-
-    if (drv_generic_parport_open(section, Name) != 0) {
-	error("%s: could not initialize parallel port!", Name);
-	return -1;
-    }
-
-    /* Soft-Wiring */
-    if (Capabilities & CAP_LCM162) {
-	/* the LCM-162 is hardwired */
-	if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl("RS", "SLCTIN")) == 0xff)
-	    return -1;
-	if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl("RW", "INIT")) == 0xff)
-	    return -1;
-	if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl("ENABLE", "AUTOFD")) == 0xff)
-	    return -1;
-	if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl("ENABLE2", "GND")) == 0xff)
-	    return -1;
-	if ((SIGNAL_ENABLE3 = drv_generic_parport_hardwire_ctrl("ENABLE3", "GND")) == 0xff)
-	    return -1;
-	if ((SIGNAL_ENABLE4 = drv_generic_parport_hardwire_ctrl("ENABLE4", "GND")) == 0xff)
-	    return -1;
-	if ((SIGNAL_BACKLIGHT = drv_generic_parport_hardwire_ctrl("BACKLIGHT", "GND")) == 0xff)
-	    return -1;
-	if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl("GPO", "GND")) == 0xff)
-	    return -1;
-    } else {
-	if (Bits == 8) {
-	    if ((SIGNAL_RS = drv_generic_parport_wire_ctrl("RS", "AUTOFD")) == 0xff)
-		return -1;
-	    if ((SIGNAL_RW = drv_generic_parport_wire_ctrl("RW", "GND")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl("ENABLE", "STROBE")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl("ENABLE2", "GND")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_ctrl("ENABLE3", "GND")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_ctrl("ENABLE4", "GND")) == 0xff)
-		return -1;
-	} else {
-	    if ((SIGNAL_RS = drv_generic_parport_wire_data("RS", "DB4")) == 0xff)
-		return -1;
-	    if ((SIGNAL_RW = drv_generic_parport_wire_data("RW", "DB5")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE = drv_generic_parport_wire_data("ENABLE", "DB6")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data("ENABLE2", "GND")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_data("ENABLE3", "GND")) == 0xff)
-		return -1;
-	    if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_data("ENABLE4", "GND")) == 0xff)
-		return -1;
-	}
-	/* backlight and GPO are always control signals */
-	if ((SIGNAL_BACKLIGHT = drv_generic_parport_wire_ctrl("BACKLIGHT", "GND")) == 0xff)
-	    return -1;
-	if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl("GPO", "GND")) == 0xff)
-	    return -1;
-    }
-
-    /* clear capabilities if corresponding signal is GND */
-    if (SIGNAL_BACKLIGHT == 0) {
-	Capabilities &= ~CAP_BACKLIGHT;
-    }
-    if (SIGNAL_GPO == 0) {
-	Capabilities &= ~CAP_GPO;
-    }
-
-
-    /* clear all signals */
-    if (Bits == 8) {
-	drv_generic_parport_control(SIGNAL_RS |
-				    SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
-    } else {
-	drv_generic_parport_data(0);
-    }
-
-    /* set direction: write */
-    drv_generic_parport_direction(0);
-
-    /* initialize *all* controllers */
-    if (Bits == 8) {
-	drv_HD_PP_command(allControllers, 0x30, T_INIT1);	/* 8 Bit mode, wait 4.1 ms */
-	drv_HD_PP_command(allControllers, 0x30, T_INIT2);	/* 8 Bit mode, wait 100 us */
-	drv_HD_PP_command(allControllers, 0x38, T_EXEC);	/* 8 Bit mode, 1/16 duty cycle, 5x8 font */
-    } else {
-	drv_HD_PP_nibble(allControllers, 0x03);
-	udelay(T_INIT1);	/* 4 Bit mode, wait 4.1 ms */
-	drv_HD_PP_nibble(allControllers, 0x03);
-	udelay(T_INIT2);	/* 4 Bit mode, wait 100 us */
-	drv_HD_PP_nibble(allControllers, 0x03);
-	udelay(T_INIT1);	/* 4 Bit mode, wait 4.1 ms */
-	drv_HD_PP_nibble(allControllers, 0x02);
-	udelay(T_INIT2);	/* 4 Bit mode, wait 100 us */
-	drv_HD_PP_command(allControllers, 0x28, T_EXEC);	/* 4 Bit mode, 1/16 duty cycle, 5x8 font */
-    }
-
-    /* maybe use busy-flag from now on  */
-    /* (we can't use the busy flag during the init sequence) */
-    cfg_number(section, "UseBusy", 0, 0, 1, &UseBusy);
-
-    /* make sure we don't use the busy flag with RW wired to GND */
-    if (UseBusy && !SIGNAL_RW) {
-	error("%s: busy-flag checking is impossible with RW wired to GND!", Name);
-	UseBusy = 0;
-    }
-
-    /* make sure the display supports busy-flag checking in 4-Bit-Mode */
-    /* at the moment this is inly possible with Martin Hejl's gpio driver, */
-    /* which allows to use 4 bits as input and 4 bits as output */
-    if (UseBusy && Bits == 4 && !(Capabilities & CAP_BUSY4BIT)) {
-	error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name);
-	UseBusy = 0;
-    }
-
-    info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not ");
-
-    /* The LCM-162 should really use BusyFlag checking */
-    if (!UseBusy && (Capabilities & CAP_LCM162)) {
-	error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name);
-    }
-
-    return 0;
-}
-
-
-static void drv_HD_PP_stop(void)
-{
-    /* clear all signals */
-    if (Bits == 8) {
-	drv_generic_parport_control(SIGNAL_RS |
-				    SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
-    } else {
-	drv_generic_parport_data(0);
-    }
-
-    drv_generic_parport_close();
-
-}
-
-
-
-/****************************************/
-/***  i2c dependant functions         ***/
-/****************************************/
-
-#ifdef WITH_I2C
-
-static void drv_HD_I2C_nibble(unsigned char controller, unsigned char nibble)
-{
-    unsigned char enable;
-
-    /* enable signal: 'controller' is a bitmask */
-    /* bit n .. send to controller #n */
-    /* so we can send a byte to more controllers at the same time! */
-    enable = 0;
-    if (controller & 0x01)
-	enable |= SIGNAL_ENABLE;
-    if (controller & 0x02)
-	enable |= SIGNAL_ENABLE2;
-    if (controller & 0x04)
-	enable |= SIGNAL_ENABLE3;
-    if (controller & 0x08)
-	enable |= SIGNAL_ENABLE4;
-
-
-    /* clear ENABLE */
-    /* put data on DB1..DB4 */
-    /* nibble already contains RS bit! */
-    drv_generic_i2c_data(nibble);
-
-    /* Address set-up time */
-    ndelay(T_AS);
-
-    /* rise ENABLE */
-    drv_generic_i2c_data(nibble | enable);
-
-    /* Enable pulse width */
-    ndelay(T_PW);
-
-    /* lower ENABLE */
-    drv_generic_i2c_data(nibble);
-
-    /* Address hold time */
-    ndelay(T_H);
-}
-
-
-static void drv_HD_I2C_byte(const unsigned char controller, const unsigned char data)
-{
-    /* send data with RS disabled */
-    /* send high nibble of the data */
-    drv_HD_I2C_nibble(controller, ((data >> 4) & 0x0f) | SIGNAL_RS);
-
-    /* Make sure we honour T_CYCLE */
-    ndelay(T_CYCLE - T_AS - T_PW);
-
-    /* send low nibble of the data */
-    drv_HD_I2C_nibble(controller, (data & 0x0f) | SIGNAL_RS);
-}
-
-
-static void drv_HD_I2C_command(const unsigned char controller, const unsigned char cmd, const int delay)
-{
-    /* send data with RS disabled */
-    drv_HD_I2C_nibble(controller, ((cmd >> 4) & 0x0f));
-
-    ndelay(T_CYCLE - T_AS - T_PW);
-
-    drv_HD_I2C_nibble(controller, ((cmd) & 0x0f));
-
-    /* wait for command completion */
-    udelay(delay);
-}
-
-static void drv_HD_I2C_data(const unsigned char controller, const char *string, const int len, const int delay)
-{
-    int l = len;
-
-    /* sanity check */
-    if (len <= 0)
-	return;
-
-    while (l--) {
-	/* send data with RS enabled */
-	drv_HD_I2C_byte(controller, *(string++));
-
-	/* wait for command completion */
-	udelay(delay);
-    }
-}
-
-
-static int drv_HD_I2C_load(const char *section)
-{
-    if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
-	return -1;
-    if (Bits != 4) {
-	error("%s: bad %s.Bits '%d' from %s, should be '4'", Name, section, Bits, cfg_source());
-	return -1;
-    }
-
-    info("%s: using %d bit mode", Name, Bits);
-
-    if (drv_generic_i2c_open(section, Name) != 0) {
-	error("%s: could not initialize i2c attached device!", Name);
-	return -1;
-    }
-
-    if ((SIGNAL_RS = drv_generic_i2c_wire("RS", "DB4")) == 0xff)
-	return -1;
-    if ((SIGNAL_RW = drv_generic_i2c_wire("RW", "DB5")) == 0xff)
-	return -1;
-    if ((SIGNAL_ENABLE = drv_generic_i2c_wire("ENABLE", "DB6")) == 0xff)
-	return -1;
-    if ((SIGNAL_ENABLE2 = drv_generic_i2c_wire("ENABLE2", "GND")) == 0xff)
-	return -1;
-    if ((SIGNAL_GPO = drv_generic_i2c_wire("GPO", "GND")) == 0xff)
-	return -1;
-
-    /* initialize display */
-    drv_HD_I2C_nibble(allControllers, 0x03);
-    udelay(T_INIT1);		/* 4 Bit mode, wait 4.1 ms */
-    drv_HD_I2C_nibble(allControllers, 0x03);
-    udelay(T_INIT2);		/* 4 Bit mode, wait 100 us */
-    drv_HD_I2C_nibble(allControllers, 0x03);
-    udelay(T_INIT2);		/* 4 Bit mode, wait 4.1 ms */
-    drv_HD_I2C_nibble(allControllers, 0x02);
-    udelay(T_INIT2);		/* 4 Bit mode, wait 100 us */
-    drv_HD_I2C_command(allControllers, 0x28, T_EXEC);	/* 4 Bit mode, 1/16 duty cycle, 5x8 font */
-
-    info("%s: I2C initialization done", Name);
-
-    return 0;
-}
-
-
-static void drv_HD_I2C_stop(void)
-{
-    /* clear all signals */
-    drv_generic_i2c_data(0);
-
-    /* close port */
-    drv_generic_i2c_close();
-}
-
-#endif				/* WITH_I2C */
-
-
-/****************************************/
-/***  display dependant functions     ***/
-/****************************************/
-
-static void drv_HD_clear(void)
-{
-    drv_HD_command(allControllers, 0x01, T_CLEAR);	/* clear *all* displays */
-}
-
-
-static int drv_HD_goto(int row, int col)
-{
-    int pos, controller;
-
-    /* handle multiple controllers */
-    for (pos = 0, controller = 0; controller < numControllers; controller++) {
-	pos += CROWS[controller];
-	if (row < pos) {
-	    currController = (1 << controller);
-	    break;
-	}
-	row -= CROWS[controller];
-    }
-
-    /* column outside of current display's width */
-    if (col >= CCOLS[controller])
-	return -1;
-
-    if (0) {
-	debug("goto: [%d,%d] mask=%d, controller=%d, size:%dx%d", row, col, currController, controller, CROWS[controller], CCOLS[controller]);
-    }
-
-    /* 16x1 Displays are organized as 8x2 :-( */
-    if (CCOLS[controller] == 16 && CROWS[controller] == 1 && col > 7) {
-	row++;
-	col -= 8;
-    }
-
-    if (Capabilities & CAP_HD66712) {
-	/* the HD66712 doesn't have a braindamadged RAM layout */
-	pos = row * 32 + col;
-    } else {
-	/* 16x4 Controllers use a slightly different layout */
-	if (CCOLS[controller] == 16 && CROWS[controller] == 4) {
-	    pos = (row % 2) * 64 + (row / 2) * 16 + col;
-	} else {
-	    pos = (row % 2) * 64 + (row / 2) * 20 + col;
-	}
-    }
-    drv_HD_command(currController, (0x80 | pos), T_EXEC);
-
-    /* return columns left on current display */
-    return CCOLS[controller] - col;
-
-}
-
-
-static void drv_HD_write(const int row, const int col, const char *data, const int len)
-{
-    int space = drv_HD_goto(row, col);
-    if (space > 0) {
-	drv_HD_data(currController, data, len > space ? space : len, T_EXEC);
-    }
-}
-
-
-static void drv_HD_defchar(const int ascii, const unsigned char *matrix)
-{
-    int i;
-    char buffer[8];
-
-    for (i = 0; i < 8; i++) {
-	buffer[i] = matrix[i] & 0x1f;
-    }
-
-    /* define chars on *all* controllers! */
-    drv_HD_command(allControllers, 0x40 | 8 * ascii, T_EXEC);
-    drv_HD_data(allControllers, buffer, 8, T_WRCG);
-}
-
-
-static int drv_HD_backlight(int backlight)
-{
-    if (!(Capabilities & CAP_BACKLIGHT))
-	return -1;
-
-    if (backlight < 0)
-	backlight = 0;
-    if (backlight > 1)
-	backlight = 1;
-
-    drv_generic_parport_control(SIGNAL_BACKLIGHT, backlight ? SIGNAL_BACKLIGHT : 0);
-
-    return backlight;
-}
-
-
-static int drv_HD_brightness(int brightness)
-{
-    char cmd;
-
-    if (!(Capabilities & CAP_BRIGHTNESS))
-	return -1;
-
-    if (brightness < 0)
-	brightness = 0;
-    if (brightness > 3)
-	brightness = 3;
-
-    cmd = '0' + brightness;
-
-    drv_HD_command(allControllers, 0x38, T_EXEC);	/* enable function */
-    drv_HD_data(allControllers, &cmd, 1, T_WRCG);	/* set brightness */
-
-    return brightness;
-}
-
-
-/* Fixme: GPO's */
-#if 0
-static void drv_HD_setGPO(const int bits)
-{
-    if (Lcd.gpos > 0) {
-
-	/* put data on DB1..DB8 */
-	drv_generic_parport_data(bits);
-
-	/* 74HCT573 set-up time */
-	ndelay(20);
-
-	/* send data */
-	/* 74HCT573 enable pulse width = 24ns */
-	drv_generic_parport_toggle(SIGNAL_GPO, 1, 230);
-    }
-}
-#endif
-
-
-static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused)
-{
-    static unsigned char data = 0x00;
-
-    /* Bit 3+5 : key number */
-    /* Bit 6   : key press/release */
-    unsigned char mask3 = 1 << 3;
-    unsigned char mask5 = 1 << 5;
-    unsigned char mask6 = 1 << 6;
-    unsigned char mask = mask3 | mask5 | mask6;
-
-    int keynum;
-    int updown;
-
-    unsigned char temp;
-
-    temp = drv_generic_parport_status() & mask;
-
-    if (data != temp) {
-	data = temp;
-
-	keynum = (data & mask3 ? 1 : 0) + (data & mask5 ? 2 : 0);
-	updown = (data & mask6 ? 1 : 0);
-
-	debug("key %d press %d", keynum, updown);
-    }
-}
-
-
-static int drv_HD_start(const char *section, const int quiet)
-{
-    char *model, *size, *bus;
-    int rows = -1, cols = -1, gpos = -1, i;
-    int size_defined = 0;
-    int size_missing = 0;
-
-    model = cfg_get(section, "Model", "generic");
-    if (model != NULL && *model != '\0') {
-	int i;
-	for (i = 0; Models[i].type != 0xff; i++) {
-	    if (strcasecmp(Models[i].name, model) == 0)
-		break;
-	}
-	if (Models[i].type == 0xff) {
-	    error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
-	    return -1;
-	}
-	Model = i;
-	Capabilities = Models[Model].capabilities;
-	info("%s: using model '%s'", Name, Models[Model].name);
-    } else {
-	error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());
-	if (model)
-	    free(model);
-	return -1;
-    }
-    free(model);
-
-    bus = cfg_get(section, "Bus", "parport");
-    if (bus == NULL && *bus == '\0') {
-	error("%s: empty '%s.Bus' entry from %s", Name, section, cfg_source());
-	if (bus)
-	    free(bus);
-	return -1;
-    }
-
-    if (strcasecmp(bus, "parport") == 0) {
-	info("%s: using parallel port", Name);
-	Bus = BUS_PP;
-	drv_HD_load = drv_HD_PP_load;
-	drv_HD_command = drv_HD_PP_command;
-	drv_HD_data = drv_HD_PP_data;
-	drv_HD_stop = drv_HD_PP_stop;
-
-    } else if (strcasecmp(bus, "i2c") == 0) {
-#ifdef WITH_I2C
-	info("%s: using I2C bus", Name);
-	Bus = BUS_I2C;
-	drv_HD_load = drv_HD_I2C_load;
-	drv_HD_command = drv_HD_I2C_command;
-	drv_HD_data = drv_HD_I2C_data;
-	drv_HD_stop = drv_HD_I2C_stop;
-#else
-	error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source());
-	error("%s: lcd4linux was compiled without i2c support!", Name);
-	free(bus);
-	return -1;
-#endif
-
-    } else {
-	error("%s: bad %s.Bus '%s' from %s, should be 'parport' or 'i2c'", Name, section, bus, cfg_source());
-	free(bus);
-	return -1;
-    }
-
-    /* sanity check: Model can use bus */
-    if (!(Capabilities & Bus)) {
-	error("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus);
-	free(bus);
-	return -1;
-    }
-    free(bus);
-
-    if (cfg_number(section, "Controllers", 1, 1, 4, (int *) &numControllers) < 0)
-	return -1;
-    info("%s: using %d Controller(s)", Name, numControllers);
-
-    /* current Controller */
-    currController = 1;
-
-    /* Bitmask for *all* Controllers */
-    allControllers = (1 << numControllers) - 1;
-
-
-    DCOLS = 0;
-    DROWS = 0;
-
-    for (i = 0; i < numControllers; i++) {
-	char key[6];
-	qprintf(key, sizeof(key), "Size%d", i + 1);
-	size = cfg_get(section, key, NULL);
-	if (size == NULL || *size == '\0') {
-	    size_missing++;
-	    free(size);
-	    continue;
-	}
-	if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
-	    error("%s: bad %s.%s '%s' from %s", Name, section, key, size, cfg_source());
-	    free(size);
-	    return -1;
-	}
-	free(size);
-	CCOLS[i] = cols;
-	CROWS[i] = rows;
-	size_defined++;
-	info("%s: Controller %d: %dx%d", Name, i + 1, cols, rows);
-	/* grow the size */
-	if (cols > DCOLS)
-	    DCOLS = cols;
-	DROWS += rows;
-    }
-    if (size_defined && size_missing) {
-	error("%s: bad %s.Size* definition in %s:", Name, section, cfg_source());
-	error("%s: either you specify the size for *all* controllers or for none.", Name);
-	return -1;
-    }
-
-    size = cfg_get(section, "Size", NULL);
-    if (size != NULL && *size != '\0') {
-	if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
-	    error("%s: bad %s.Size '%s' from %s", Name, section, size, cfg_source());
-	    free(size);
-	    return -1;
-	}
-	if (DCOLS == 0 && DROWS == 0) {
-	    for (i = 0; i < numControllers; i++) {
-		CCOLS[i] = cols;
-		CROWS[i] = rows / numControllers;
-		DCOLS = CCOLS[i];
-		DROWS += CROWS[i];
-	    }
-	}
-	if (rows != DROWS || cols != DCOLS) {
-	    error("%s: bad %s.Size definition in %s:", Name, section, cfg_source());
-	    error("%s: Size %dx%d should be %dx%d", Name, cols, rows, DCOLS, DROWS);
-	    return -1;
-	}
-    }
-    free(size);
-
-
-    if (cfg_number(section, "GPOs", 0, 0, 8, &gpos) < 0)
-	return -1;
-    if (gpos > 0 && !(Capabilities & CAP_GPO)) {
-	error("%s: Model '%s' does not support GPO's!", Name, Models[Model].name);
-	gpos = 0;
-    }
-    GPOS = gpos;
-    if (gpos > 0) {
-	info("%s: using %d GPO's", Name, GPOS);
-    }
-
-    if (drv_HD_load(section) < 0) {
-	error("%s: start display failed!", Name);
-	return -1;
-    }
-
-    drv_HD_command(allControllers, 0x08, T_EXEC);	/* Controller off, cursor off, blink off */
-    drv_HD_command(allControllers, 0x0c, T_CLEAR);	/* Display on, cursor off, blink off, wait 1.64 ms */
-    drv_HD_command(allControllers, 0x06, T_EXEC);	/* curser moves to right, no shift */
-
-    if ((Capabilities & CAP_HD66712) && DROWS > 2) {
-	drv_HD_command(allControllers, Bits == 8 ? 0x3c : 0x2c, T_EXEC);	/* set extended register enable bit */
-	drv_HD_command(allControllers, 0x09, T_EXEC);	/* set 4-line mode */
-	drv_HD_command(allControllers, Bits == 8 ? 0x38 : 0x28, T_EXEC);	/* clear extended register enable bit */
-    }
-
-    drv_HD_clear();		/* clear *all* displays */
-    drv_HD_command(allControllers, 0x03, T_CLEAR);	/* return home */
-
-    /* maybe set backlight */
-    if (Capabilities & CAP_BACKLIGHT) {
-	int backlight;
-	if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) {
-	    info("%s: backlight %s", Name, backlight ? "enabled" : "disabled");
-	    drv_HD_backlight(backlight);
-	}
-    }
-
-    /* maybe set brightness */
-    if (Capabilities & CAP_BRIGHTNESS) {
-	int brightness;
-	if (cfg_number(section, "Brightness", 0, 0, 3, &brightness) > 0) {
-	    info("%s: brightness level %d", Name, brightness);
-	    drv_HD_brightness(brightness);
-	}
-    }
-
-    /* install keypad polling timer for LCM-162 */
-    if (Capabilities & CAP_LCM162) {
-	timer_add(drv_HD_LCM162_timer, NULL, 10, 0);
-    }
-
-    if (!quiet) {
-	char buffer[40];
-	qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
-	if (drv_generic_text_greet(buffer, NULL)) {
-	    sleep(3);
-	    drv_HD_clear();
-	}
-    }
-
-    return 0;
-}
-
-
-/****************************************/
-/***            plugins               ***/
-/****************************************/
-
-
-static void plugin_backlight(RESULT * result, RESULT * arg1)
-{
-    double backlight;
-
-    backlight = drv_HD_backlight(R2N(arg1));
-    SetResult(&result, R_NUMBER, &backlight);
-}
-
-
-static void plugin_brightness(RESULT * result, RESULT * arg1)
-{
-    double brightness;
-
-    brightness = drv_HD_brightness(R2N(arg1));
-    SetResult(&result, R_NUMBER, &brightness);
-}
-
-
-/****************************************/
-/***        widget callbacks          ***/
-/****************************************/
-
-
-/* using drv_generic_text_draw(W) */
-/* using drv_generic_text_icon_draw(W) */
-/* using drv_generic_text_bar_draw(W) */
-
-
-/****************************************/
-/***        exported functions        ***/
-/****************************************/
-
-
-/* list models */
-int drv_HD_list(void)
-{
-    int i;
-
-    for (i = 0; Models[i].type != 0xff; i++) {
-	printf("%s ", Models[i].name);
-    }
-    return 0;
-}
-
-
-/* initialize driver & display */
-int drv_HD_init(const char *section, const int quiet)
-{
-    WIDGET_CLASS wc;
-    int asc255bug;
-    int ret;
-
-    /* display preferences */
-    XRES = 5;			/* pixel width of one char  */
-    YRES = 8;			/* pixel height of one char  */
-    CHARS = 8;			/* number of user-defineable characters */
-    CHAR0 = 0;			/* ASCII of first user-defineable char */
-    GOTO_COST = 1;		/* number of bytes a goto command requires */
-
-    /* real worker functions */
-    drv_generic_text_real_write = drv_HD_write;
-    drv_generic_text_real_defchar = drv_HD_defchar;
-
-
-    /* start display */
-    if ((ret = drv_HD_start(section, quiet)) != 0)
-	return ret;
-
-    /* initialize generic text driver */
-    if ((ret = drv_generic_text_init(section, Name)) != 0)
-	return ret;
-
-    /* initialize generic icon driver */
-    if ((ret = drv_generic_text_icon_init()) != 0)
-	return ret;
-
-    /* initialize generic bar driver */
-    if ((ret = drv_generic_text_bar_init(0)) != 0)
-	return ret;
-
-    /* add fixed chars to the bar driver */
-    /* most displays have a full block on ascii 255, but some have kind of  */
-    /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */
-    /* char will not be used, but rendered by the bar driver */
-    cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
-    drv_generic_text_bar_add_segment(0, 0, 255, 32);	/* ASCII  32 = blank */
-    if (!asc255bug)
-	drv_generic_text_bar_add_segment(255, 255, 255, 255);	/* ASCII 255 = block */
-
-    /* register text widget */
-    wc = Widget_Text;
-    wc.draw = drv_generic_text_draw;
-    widget_register(&wc);
-
-    /* register icon widget */
-    wc = Widget_Icon;
-    wc.draw = drv_generic_text_icon_draw;
-    widget_register(&wc);
-
-    /* register bar widget */
-    wc = Widget_Bar;
-    wc.draw = drv_generic_text_bar_draw;
-    widget_register(&wc);
-
-    /* register plugins */
-    if (Capabilities & CAP_BACKLIGHT) {
-	AddFunction("LCD::backlight", 1, plugin_backlight);
-    }
-    if (Capabilities & CAP_BRIGHTNESS) {
-	AddFunction("LCD::brightness", 1, plugin_brightness);
-    }
-
-    return 0;
-}
-
-
-/* close driver & display */
-int drv_HD_quit(const int quiet)
-{
-
-    info("%s: shutting down.", Name);
-
-    drv_generic_text_quit();
-
-    /* clear display */
-    drv_HD_clear();
-
-    /* say goodbye... */
-    if (!quiet) {
-	drv_generic_text_greet("goodbye!", NULL);
-    }
-
-    drv_HD_stop();
-
-    return (0);
-}
-
-
-DRIVER drv_HD44780 = {
-  name:Name,
-  list:drv_HD_list,
-  init:drv_HD_init,
-  quit:drv_HD_quit,
-};
+ * Revision 1.50  2005/05/31 20:42:55  lfcorreia
+ * new file: lcd4linux_i2c.h
+ * avoid the problems detecting the proper I2C kernel include files
+ *
+ * rearrange all the other autoconf stuff to remove I2C detection
+ *
+ * new method by Paul Kamphuis to write to the I2C device
+ *

+ * Revision 1.49  2005/05/08 04:32:44  reinelt

+ * CodingStyle added and applied

+ *

+ * Revision 1.48  2005/05/05 08:36:12  reinelt

+ * changed SELECT to SLCTIN

+ *

+ * Revision 1.47  2005/03/28 22:29:23  reinelt

+ * HD44780 multiple displays patch from geronet

+ *

+ * Revision 1.46  2005/03/28 19:39:23  reinelt

+ * HD44780/I2C patch from Luis merged (still does not work for me)

+ *

+ * Revision 1.45  2005/03/25 15:44:43  reinelt

+ * HD44780 Backlight fixed (thanks to geronet)

+ *

+ * Revision 1.44  2005/01/29 09:30:56  reinelt

+ * minor HD44780 cleanups

+ *

+ * Revision 1.43  2005/01/18 06:30:23  reinelt

+ * added (C) to all copyright statements

+ *

+ * Revision 1.42  2005/01/17 06:38:48  reinelt

+ * info about backlight and brightness

+ *

+ * Revision 1.41  2005/01/17 06:29:24  reinelt

+ * added software-controlled backlight support to HD44780

+ *

+ * Revision 1.40  2004/11/30 05:01:25  reinelt

+ * removed compiler warnings for deactivated i2c bus

+ *

+ * Revision 1.39  2004/10/17 09:24:31  reinelt

+ * I2C support for HD44780 displays by Luis (does not work by now)

+ *

+ * Revision 1.38  2004/09/19 09:31:19  reinelt

+ * HD44780 busy flag checking improved: fall back to busy-waiting if too many errors occur

+ *

+ * Revision 1.37  2004/09/18 15:58:57  reinelt

+ * even more HD44780 cleanups, hardwiring for LCM-162

+ *

+ * Revision 1.36  2004/09/18 10:57:29  reinelt

+ * more parport/i2c cleanups

+ *

+ * Revision 1.35  2004/09/18 09:48:29  reinelt

+ * HD44780 cleanup and prepararation for I2C backend

+ * LCM-162 submodel framework

+ *

+ * Revision 1.34  2004/09/18 08:22:59  reinelt

+ * drv_generic_parport_status() to read status lines

+ *

+ * Revision 1.33  2004/08/29 13:03:41  reinelt

+ *

+ * added RouterBoard driver

+ *

+ * Revision 1.32  2004/06/26 12:04:59  reinelt

+ *

+ * uh-oh... the last CVS log message messed up things a lot...

+ *

+ * Revision 1.31  2004/06/26 09:27:20  reinelt

+ *

+ * added '-W' to CFLAGS

+ * changed all C++ comments to C ones

+ * cleaned up a lot of signed/unsigned mistakes

+ *

+ * Revision 1.30  2004/06/20 10:09:54  reinelt

+ *

+ * 'const'ified the whole source

+ *

+ * Revision 1.29  2004/06/06 06:51:59  reinelt

+ *

+ * do not display end splash screen if quiet=1

+ *

+ * Revision 1.28  2004/06/05 06:41:39  reinelt

+ *

+ * chancged splash screen again

+ *

+ * Revision 1.27  2004/06/05 06:13:11  reinelt

+ *

+ * splash screen for all text-based display drivers

+ *

+ * Revision 1.26  2004/06/02 10:09:22  reinelt

+ *

+ * splash screen for HD44780

+ *

+ * Revision 1.25  2004/06/02 09:41:19  reinelt

+ *

+ * prepared support for startup splash screen

+ *

+ * Revision 1.24  2004/06/01 06:45:29  reinelt

+ *

+ * some Fixme's processed

+ * documented some code

+ *

+ * Revision 1.23  2004/05/31 05:38:02  reinelt

+ *

+ * fixed possible bugs with user-defined chars (clear high bits)

+ * thanks to Andy Baxter for debugging the MilfordInstruments driver!

+ *

+ * Revision 1.22  2004/05/27 03:39:47  reinelt

+ *

+ * changed function naming scheme to plugin::function

+ *

+ * Revision 1.21  2004/05/26 11:37:36  reinelt

+ *

+ * Curses driver ported.

+ *

+ * Revision 1.20  2004/05/22 04:23:49  reinelt

+ *

+ * removed 16*x fix again (next time think before commit :-)

+ *

+ * Revision 1.19  2004/05/22 04:21:02  reinelt

+ *

+ * fix for display RAM layout on 16x4 displays (thanks to toxicated101)

+ *

+ * Revision 1.18  2004/03/20 07:31:32  reinelt

+ * support for HD66712 (which has a different RAM layout)

+ * further threading development

+ *

+ * Revision 1.17  2004/03/19 09:17:46  reinelt

+ *

+ * removed the extra 'goto' function, row and col are additional parameters

+ * of the write() function now.

+ *

+ * Revision 1.16  2004/03/11 06:39:58  reinelt

+ * big patch from Martin:

+ * - reuse filehandles

+ * - memory leaks fixed

+ * - earlier busy-flag checking with HD44780

+ * - reuse memory for strings in RESULT and hash

+ * - netdev_fast to wavid time-consuming regex

+ *

+ * Revision 1.15  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 1.14  2004/03/01 04:29:51  reinelt

+ * cfg_number() returns -1 on error, 0 if value not found (but default val used),

+ *  and 1 if value was used from the configuration.

+ * HD44780 driver adopted to new cfg_number()

+ * Crystalfontz 631 driver nearly finished

+ *

+ * Revision 1.13  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 1.12  2004/02/14 11:56:17  reinelt

+ * M50530 driver ported

+ * changed lots of 'char' to 'unsigned char'

+ *

+ * Revision 1.11  2004/02/04 19:10:51  reinelt

+ * Crystalfontz driver nearly finished

+ *

+ * Revision 1.10  2004/02/02 05:22:16  reinelt

+ * Brightness fpr Noritake Displays avaliable as a plugin

+ *

+ * Revision 1.9  2004/02/01 11:51:22  hejl

+ * Fixes for busy flag

+ *

+ * Revision 1.8  2004/02/01 08:05:12  reinelt

+ * Crystalfontz 633 extensions (CRC checking and stuff)

+ * Models table for HD44780

+ * Noritake VFD BVrightness patch from Bill Paxton

+ *

+ * Revision 1.7  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 1.6  2004/01/29 04:40:02  reinelt

+ * every .c file includes "config.h" now

+ *

+ * Revision 1.5  2004/01/23 07:04:17  reinelt

+ * icons finished!

+ *

+ * Revision 1.4  2004/01/23 04:53:48  reinelt

+ * icon widget added (not finished yet!)

+ *

+ * Revision 1.3  2004/01/22 07:57:45  reinelt

+ * several bugs fixed where segfaulting on layout>display

+ * Crystalfontz driver optimized, 632 display already works

+ *

+ * Revision 1.2  2004/01/21 06:39:27  reinelt

+ * HD44780 missed the "clear display' sequence

+ * asc255bug handling added

+ * HD44780 tested, works here!

+ *

+ * Revision 1.1  2004/01/20 15:32:49  reinelt

+ * first version of Next Generation HD44780 (untested! but it compiles...)

+ * some cleanup in the other drivers

+ *

+ */

+

+/* 

+ *

+ * exported fuctions:

+ *

+ * struct DRIVER drv_HD44780

+ *

+ */

+

+#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 <sys/time.h>

+#include <sys/ioctl.h>

+

+#include "debug.h"

+#include "cfg.h"

+#include "udelay.h"

+#include "qprintf.h"

+#include "timer.h"

+#include "plugin.h"

+#include "widget.h"

+#include "widget_text.h"

+#include "widget_icon.h"

+#include "widget_bar.h"

+#include "drv.h"

+#include "drv_generic_text.h"

+#include "drv_generic_parport.h"

+

+#ifdef WITH_I2C

+#include "drv_generic_i2c.h"

+#endif

+

+static char Name[] = "HD44780";

+

+static int Bus;

+static int Model;

+static int Capabilities;

+

+

+/* low level communication timings [nanoseconds]

+ * as these values differ from spec to spec,

+ * we use the worst-case values.

+ */

+

+#define T_CYCLE 1000		/* Enable cycle time */

+#define T_PW     450		/* Enable pulse width */

+#define T_AS      60		/* Address setup time */

+#define T_H       40		/* Data hold time */

+#define T_AH      20		/* Address hold time */

+

+

+/* HD44780 execution timings [microseconds]

+ * as these values differ from spec to spec,

+ * we use the worst-case values.

+ */

+

+#define T_INIT1 4100		/* first init sequence:  4.1 msec */

+#define T_INIT2  100		/* second init sequence: 100 usec */

+#define T_EXEC    80		/* normal execution time */

+#define T_WRCG   120		/* CG RAM Write */

+#define T_CLEAR 2250		/* Clear Display */

+

+

+static int Bits = 0;

+static int numControllers = 0;

+static int allControllers = 0;

+static int currController = 0;

+

+/* size of every single controller */

+static int CROWS[4];

+static int CCOLS[4];

+

+static unsigned char SIGNAL_RW;

+static unsigned char SIGNAL_RS;

+static unsigned char SIGNAL_ENABLE;

+static unsigned char SIGNAL_ENABLE2;

+static unsigned char SIGNAL_ENABLE3;

+static unsigned char SIGNAL_ENABLE4;

+static unsigned char SIGNAL_BACKLIGHT;

+static unsigned char SIGNAL_GPO;

+

+/* maximum time to wait for the busy-flag (in usec) */

+#define MAX_BUSYFLAG_WAIT 10000

+

+/* maximum busy flag errors before falling back to busy-waiting */

+#define MAX_BUSYFLAG_ERRORS 20

+

+/* flag for busy-waiting vs. busy flag checking */

+static int UseBusy = 0;

+

+

+/* Fixme: GPO's not yet implemented */

+static int GPOS;

+/* static int GPO=0; */

+

+

+typedef struct {

+    int type;

+    char *name;

+    int capabilities;

+} MODEL;

+

+#define CAP_PARPORT    (1<<0)

+#define CAP_I2C        (1<<1)

+#define CAP_GPO        (1<<2)

+#define CAP_BACKLIGHT  (1<<3)

+#define CAP_BRIGHTNESS (1<<4)

+#define CAP_BUSY4BIT   (1<<5)

+#define CAP_HD66712    (1<<6)

+#define CAP_LCM162     (1<<7)

+

+#define BUS_PP  CAP_PARPORT

+#define BUS_I2C CAP_I2C

+

+

+static MODEL Models[] = {

+    {0x01, "generic", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT},

+    {0x02, "Noritake", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BRIGHTNESS},

+    {0x03, "Soekris", CAP_PARPORT | CAP_BUSY4BIT},

+    {0x04, "HD66712", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT | CAP_HD66712},

+    {0x05, "LCM-162", CAP_PARPORT | CAP_LCM162},

+    {0xff, "Unknown", 0}

+};

+

+

+/****************************************/

+/***  generic functions               ***/

+/****************************************/

+

+static int (*drv_HD_load) (const char *section);

+static void (*drv_HD_command) (const unsigned char controller, const unsigned char cmd, const int delay);

+static void (*drv_HD_data) (const unsigned char controller, const char *string, const int len, const int delay);

+static void (*drv_HD_stop) (void);

+

+

+

+/****************************************/

+/***  parport dependant functions     ***/

+/****************************************/

+

+static void drv_HD_PP_busy(const int controller)

+{

+    static unsigned int errors = 0;

+

+    unsigned char enable;

+    unsigned char data = 0xFF;

+    unsigned char busymask;

+    unsigned char ctrlmask;

+    unsigned int counter;

+

+    if (Bits == 8) {

+	busymask = 0x80;

+    } else {

+	/* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD

+	 * (and consequently, DB3 on the partport is mapped to DB7 on the LCD)

+	 * we need to listen for DB3 on the parport to go low

+	 */

+	busymask = 0x08;

+    }

+

+    ctrlmask = 0x08;

+    while (ctrlmask > 0) {

+

+	if (controller & ctrlmask) {

+

+	    enable = 0;

+	    if (ctrlmask & 0x01)

+		enable = SIGNAL_ENABLE;

+	    else if (ctrlmask & 0x02)

+		enable = SIGNAL_ENABLE2;

+	    else if (ctrlmask & 0x04)

+		enable = SIGNAL_ENABLE3;

+	    else if (ctrlmask & 0x08)

+		enable = SIGNAL_ENABLE4;

+

+	    /* set data-lines to input */

+	    drv_generic_parport_direction(1);

+

+	    if (Bits == 8) {

+		/* Set RW, clear RS */

+		drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RW);

+	    } else {

+		drv_generic_parport_data(SIGNAL_RW);

+	    }

+

+	    /* Address set-up time */

+	    ndelay(T_AS);

+

+	    /* rise ENABLE */

+	    if (Bits == 8) {

+		drv_generic_parport_control(enable, enable);

+	    } else {

+		drv_generic_parport_data(SIGNAL_RW | enable);

+	    }

+

+	    counter = 0;

+	    while (1) {

+		/* read the busy flag */

+		data = drv_generic_parport_read();

+		if ((data & busymask) == 0) {

+		    errors = 0;

+		    break;

+		}

+

+		/* make sure we don't wait forever

+		 * - but only check after 5 iterations

+		 * that way, we won't slow down normal mode

+		 * (where we don't need the timeout anyway) 

+		 */

+		counter++;

+

+		if (counter >= 5) {

+		    struct timeval now, end;

+

+		    if (counter == 5) {

+			/* determine the time when the timeout has expired */

+			gettimeofday(&end, NULL);

+			end.tv_usec += MAX_BUSYFLAG_WAIT;

+			while (end.tv_usec > 1000000) {

+			    end.tv_usec -= 1000000;

+			    end.tv_sec++;

+			}

+		    }

+

+		    /* get the current time */

+		    gettimeofday(&now, NULL);

+		    if (now.tv_sec == end.tv_sec ? now.tv_usec >= end.tv_usec : now.tv_sec >= end.tv_sec) {

+			error("%s: timeout waiting for busy flag on controller %x (%x)", Name, ctrlmask, data);

+			if (++errors >= MAX_BUSYFLAG_ERRORS) {

+			    error("%s: too many busy flag failures, turning off busy flag checking.", Name);

+			    UseBusy = 0;

+			}

+			break;

+		    }

+		}

+	    }

+

+	    /* RS=low, RW=low, EN=low */

+	    if (Bits == 8) {

+		/* Lower EN */

+		drv_generic_parport_control(enable, 0);

+

+		/* Address hold time */

+		ndelay(T_AH);

+

+		drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);

+	    } else {

+		/* Lower EN */

+		drv_generic_parport_data(SIGNAL_RW);

+		ndelay(T_AH);

+		drv_generic_parport_data(0);

+	    }

+

+	    /* set data-lines to output */

+	    drv_generic_parport_direction(0);

+	}

+	ctrlmask >>= 1;

+    }

+}

+

+

+static void drv_HD_PP_nibble(const unsigned char controller, const unsigned char nibble)

+{

+    unsigned char enable;

+

+    /* enable signal: 'controller' is a bitmask */

+    /* bit n .. send to controller #n */

+    /* so we can send a byte to more controllers at the same time! */

+    enable = 0;

+    if (controller & 0x01)

+	enable |= SIGNAL_ENABLE;

+    if (controller & 0x02)

+	enable |= SIGNAL_ENABLE2;

+    if (controller & 0x04)

+	enable |= SIGNAL_ENABLE3;

+    if (controller & 0x08)

+	enable |= SIGNAL_ENABLE4;

+

+    /* clear ENABLE */

+    /* put data on DB1..DB4 */

+    /* nibble already contains RS bit! */

+    drv_generic_parport_data(nibble);

+

+    /* Address set-up time */

+    ndelay(T_AS);

+

+    /* rise ENABLE */

+    drv_generic_parport_data(nibble | enable);

+

+    /* Enable pulse width */

+    ndelay(T_PW);

+

+    /* lower ENABLE */

+    drv_generic_parport_data(nibble);

+}

+

+

+static void drv_HD_PP_byte(const unsigned char controller, const unsigned char data, const unsigned char RS)

+{

+    /* send high nibble of the data */

+    drv_HD_PP_nibble(controller, ((data >> 4) & 0x0f) | RS);

+

+    /* Make sure we honour T_CYCLE */

+    ndelay(T_CYCLE - T_AS - T_PW);

+

+    /* send low nibble of the data */

+    drv_HD_PP_nibble(controller, (data & 0x0f) | RS);

+}

+

+

+static void drv_HD_PP_command(const unsigned char controller, const unsigned char cmd, const int delay)

+{

+    unsigned char enable;

+

+    if (UseBusy)

+	drv_HD_PP_busy(controller);

+

+    if (Bits == 8) {

+

+	/* enable signal: 'controller' is a bitmask */

+	/* bit n .. send to controller #n */

+	/* so we can send a byte to more controllers at the same time! */

+	enable = 0;

+	if (controller & 0x01)

+	    enable |= SIGNAL_ENABLE;

+	if (controller & 0x02)

+	    enable |= SIGNAL_ENABLE2;

+	if (controller & 0x04)

+	    enable |= SIGNAL_ENABLE3;

+	if (controller & 0x08)

+	    enable |= SIGNAL_ENABLE4;

+

+	/* put data on DB1..DB8 */

+	drv_generic_parport_data(cmd);

+

+	/* clear RW and RS */

+	drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);

+

+	/* Address set-up time */

+	ndelay(T_AS);

+

+	/* send command */

+	drv_generic_parport_toggle(enable, 1, T_PW);

+

+    } else {

+

+	drv_HD_PP_byte(controller, cmd, 0);

+

+    }

+

+    /* wait for command completion */

+    if (!UseBusy)

+	udelay(delay);

+

+}

+

+

+static void drv_HD_PP_data(const unsigned char controller, const char *string, const int len, const int delay)

+{

+    int l = len;

+    unsigned char enable;

+

+    /* sanity check */

+    if (len <= 0)

+	return;

+

+    if (Bits == 8) {

+

+	/* enable signal: 'controller' is a bitmask */

+	/* bit n .. send to controller #n */

+	/* so we can send a byte to more controllers at the same time! */

+	enable = 0;

+	if (controller & 0x01)

+	    enable |= SIGNAL_ENABLE;

+	if (controller & 0x02)

+	    enable |= SIGNAL_ENABLE2;

+	if (controller & 0x04)

+	    enable |= SIGNAL_ENABLE3;

+	if (controller & 0x08)

+	    enable |= SIGNAL_ENABLE4;

+

+	if (!UseBusy) {

+	    /* clear RW, set RS */

+	    drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);

+	    /* Address set-up time */

+	    ndelay(T_AS);

+	}

+

+	while (l--) {

+

+	    if (UseBusy) {

+		drv_HD_PP_busy(controller);

+		/* clear RW, set RS */

+		drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);

+		/* Address set-up time */

+		ndelay(T_AS);

+	    }

+

+	    /* put data on DB1..DB8 */

+	    drv_generic_parport_data(*(string++));

+

+	    /* send command */

+	    drv_generic_parport_toggle(enable, 1, T_PW);

+

+	    /* wait for command completion */

+	    if (!UseBusy)

+		udelay(delay);

+	}

+

+    } else {			/* 4 bit mode */

+

+	while (l--) {

+	    if (UseBusy)

+		drv_HD_PP_busy(controller);

+

+	    /* send data with RS enabled */

+	    drv_HD_PP_byte(controller, *(string++), SIGNAL_RS);

+

+	    /* wait for command completion */

+	    if (!UseBusy)

+		udelay(delay);

+	}

+    }

+}

+

+

+static int drv_HD_PP_load(const char *section)

+{

+    if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)

+	return -1;

+

+    if (Bits != 4 && Bits != 8) {

+	error("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source());

+	return -1;

+    }

+

+    /* LCM-162 only supports 8-bit-mode */

+    if (Capabilities & CAP_LCM162 && Bits != 8) {

+	error("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits);

+	Bits = 8;

+    }

+    info("%s: using %d bit mode", Name, Bits);

+

+    if (drv_generic_parport_open(section, Name) != 0) {

+	error("%s: could not initialize parallel port!", Name);

+	return -1;

+    }

+

+    /* Soft-Wiring */

+    if (Capabilities & CAP_LCM162) {

+	/* the LCM-162 is hardwired */

+	if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl("RS", "SLCTIN")) == 0xff)

+	    return -1;

+	if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl("RW", "INIT")) == 0xff)

+	    return -1;

+	if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl("ENABLE", "AUTOFD")) == 0xff)

+	    return -1;

+	if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl("ENABLE2", "GND")) == 0xff)

+	    return -1;

+	if ((SIGNAL_ENABLE3 = drv_generic_parport_hardwire_ctrl("ENABLE3", "GND")) == 0xff)

+	    return -1;

+	if ((SIGNAL_ENABLE4 = drv_generic_parport_hardwire_ctrl("ENABLE4", "GND")) == 0xff)

+	    return -1;

+	if ((SIGNAL_BACKLIGHT = drv_generic_parport_hardwire_ctrl("BACKLIGHT", "GND")) == 0xff)

+	    return -1;

+	if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl("GPO", "GND")) == 0xff)

+	    return -1;

+    } else {

+	if (Bits == 8) {

+	    if ((SIGNAL_RS = drv_generic_parport_wire_ctrl("RS", "AUTOFD")) == 0xff)

+		return -1;

+	    if ((SIGNAL_RW = drv_generic_parport_wire_ctrl("RW", "GND")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl("ENABLE", "STROBE")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl("ENABLE2", "GND")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_ctrl("ENABLE3", "GND")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_ctrl("ENABLE4", "GND")) == 0xff)

+		return -1;

+	} else {

+	    if ((SIGNAL_RS = drv_generic_parport_wire_data("RS", "DB4")) == 0xff)

+		return -1;

+	    if ((SIGNAL_RW = drv_generic_parport_wire_data("RW", "DB5")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE = drv_generic_parport_wire_data("ENABLE", "DB6")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data("ENABLE2", "GND")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_data("ENABLE3", "GND")) == 0xff)

+		return -1;

+	    if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_data("ENABLE4", "GND")) == 0xff)

+		return -1;

+	}

+	/* backlight and GPO are always control signals */

+	if ((SIGNAL_BACKLIGHT = drv_generic_parport_wire_ctrl("BACKLIGHT", "GND")) == 0xff)

+	    return -1;

+	if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl("GPO", "GND")) == 0xff)

+	    return -1;

+    }

+

+    /* clear capabilities if corresponding signal is GND */

+    if (SIGNAL_BACKLIGHT == 0) {

+	Capabilities &= ~CAP_BACKLIGHT;

+    }

+    if (SIGNAL_GPO == 0) {

+	Capabilities &= ~CAP_GPO;

+    }

+

+

+    /* clear all signals */

+    if (Bits == 8) {

+	drv_generic_parport_control(SIGNAL_RS |

+				    SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);

+    } else {

+	drv_generic_parport_data(0);

+    }

+

+    /* set direction: write */

+    drv_generic_parport_direction(0);

+

+    /* initialize *all* controllers */

+    if (Bits == 8) {

+	drv_HD_PP_command(allControllers, 0x30, T_INIT1);	/* 8 Bit mode, wait 4.1 ms */

+	drv_HD_PP_command(allControllers, 0x30, T_INIT2);	/* 8 Bit mode, wait 100 us */

+	drv_HD_PP_command(allControllers, 0x38, T_EXEC);	/* 8 Bit mode, 1/16 duty cycle, 5x8 font */

+    } else {

+	drv_HD_PP_nibble(allControllers, 0x03);

+	udelay(T_INIT1);	/* 4 Bit mode, wait 4.1 ms */

+	drv_HD_PP_nibble(allControllers, 0x03);

+	udelay(T_INIT2);	/* 4 Bit mode, wait 100 us */

+	drv_HD_PP_nibble(allControllers, 0x03);

+	udelay(T_INIT1);	/* 4 Bit mode, wait 4.1 ms */

+	drv_HD_PP_nibble(allControllers, 0x02);

+	udelay(T_INIT2);	/* 4 Bit mode, wait 100 us */

+	drv_HD_PP_command(allControllers, 0x28, T_EXEC);	/* 4 Bit mode, 1/16 duty cycle, 5x8 font */

+    }

+

+    /* maybe use busy-flag from now on  */

+    /* (we can't use the busy flag during the init sequence) */

+    cfg_number(section, "UseBusy", 0, 0, 1, &UseBusy);

+

+    /* make sure we don't use the busy flag with RW wired to GND */

+    if (UseBusy && !SIGNAL_RW) {

+	error("%s: busy-flag checking is impossible with RW wired to GND!", Name);

+	UseBusy = 0;

+    }

+

+    /* make sure the display supports busy-flag checking in 4-Bit-Mode */

+    /* at the moment this is inly possible with Martin Hejl's gpio driver, */

+    /* which allows to use 4 bits as input and 4 bits as output */

+    if (UseBusy && Bits == 4 && !(Capabilities & CAP_BUSY4BIT)) {

+	error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name);

+	UseBusy = 0;

+    }

+

+    info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not ");

+

+    /* The LCM-162 should really use BusyFlag checking */

+    if (!UseBusy && (Capabilities & CAP_LCM162)) {

+	error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name);

+    }

+

+    return 0;

+}

+

+

+static void drv_HD_PP_stop(void)

+{

+    /* clear all signals */

+    if (Bits == 8) {

+	drv_generic_parport_control(SIGNAL_RS |

+				    SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);

+    } else {

+	drv_generic_parport_data(0);

+    }

+

+    drv_generic_parport_close();

+

+}

+

+

+#ifdef WITH_I2C

+

+/****************************************/

+/***  i2c dependant functions         ***/

+/****************************************/

+

+    /*

+        DISCLAIMER!!!!

+		

+		The following code is WORK IN PROGRESS, since it basicly 'works for us...'

+

+		(C) 2005 Paul Kamphuis & Luis Correia

+

+		We have removed all of the delays from this code, as the I2C bus is slow enough...

+		(maximum possible speed is 100KHz only)

+

+	*/

+

+static void drv_HD_I2C_nibble(unsigned char controller, unsigned char nibble)

+{

+    unsigned char enable;

+    unsigned char command; /* this is actually the first data byte on the PCF8574 */

+    unsigned char data_block[2];

+    /* enable signal: 'controller' is a bitmask */

+    /* bit n .. send to controller #n */

+    /* so we can send a byte to more controllers at the same time! */

+    enable = 0;

+    if (controller & 0x01)

+	enable |= SIGNAL_ENABLE;

+    if (controller & 0x02)

+	enable |= SIGNAL_ENABLE2;

+    if (controller & 0x04)

+	enable |= SIGNAL_ENABLE3;

+    if (controller & 0x08)

+	enable |= SIGNAL_ENABLE4;

+

+    /*

+        The new method Paul Kamphuis has concocted places the 3 needed writes to the I2C device

+	    as a single operation, using the 'i2c_smbus_write_block_data' function.

+		These actual writes are performed by putting the nibble along with the 'EN' signal.

+

+		command = first byte to be written, which contains the nibble (DB0..DB3)

+		data [0]   = second byte to be written, which contains the nibble plus the EN signal

+		data [1]   = third byte to be written, which contains the nibble (DB0..DB3)

+

+		Then we write the block as a whole.

+

+		The main advantage we see is that we do 2 less IOCTL's from our driver.

+	*/

+

+    command		= nibble;

+    data_block[0] = nibble | enable;

+    data_block[1] = nibble;

+

+	drv_generic_i2c_command(command,data_block,2);

+}

+

+

+static void drv_HD_I2C_byte(const unsigned char controller, const unsigned char data)

+{

+    /* send data with RS enabled */

+    drv_HD_I2C_nibble(controller, ((data >> 4) & 0x0f) | SIGNAL_RS);

+    drv_HD_I2C_nibble(controller, (data & 0x0f) | SIGNAL_RS);

+}

+

+

+static void drv_HD_I2C_command(const unsigned char controller, const unsigned char cmd, const int delay)

+{

+    /* send data with RS disabled */

+    drv_HD_I2C_nibble(controller, ((cmd >> 4) & 0x0f));

+    drv_HD_I2C_nibble(controller, ((cmd) & 0x0f));

+}

+

+static void drv_HD_I2C_data(const unsigned char controller, const char *string, const int len, const int delay)

+{

+    int l = len;

+

+    /* sanity check */

+    if (len <= 0)

+	return;

+

+    while (l--) {

+	drv_HD_I2C_byte(controller, *(string++));

+    }

+}

+

+

+static int drv_HD_I2C_load(const char *section)

+{

+    if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)

+	return -1;

+    if (Bits != 4) {

+	error("%s: bad %s.Bits '%d' from %s, should be '4'", Name, section, Bits, cfg_source());

+	return -1;

+    }

+

+    info("%s: using %d bit mode", Name, Bits);

+

+    if (drv_generic_i2c_open(section, Name) != 0) {

+	error("%s: could not initialize i2c attached device!", Name);

+	return -1;

+    }

+

+    if ((SIGNAL_RS = drv_generic_i2c_wire("RS", "DB4")) == 0xff)

+	return -1;

+    if ((SIGNAL_RW = drv_generic_i2c_wire("RW", "DB5")) == 0xff)

+	return -1;

+    if ((SIGNAL_ENABLE = drv_generic_i2c_wire("ENABLE", "DB6")) == 0xff)

+	return -1;

+    if ((SIGNAL_ENABLE2 = drv_generic_i2c_wire("ENABLE2", "GND")) == 0xff)

+	return -1;

+    if ((SIGNAL_GPO = drv_generic_i2c_wire("GPO", "GND")) == 0xff)

+	return -1;

+

+    /* initialize display */

+    drv_HD_I2C_nibble(allControllers, 0x03);

+    udelay(T_INIT1);		/* 4 Bit mode, wait 4.1 ms */

+    drv_HD_I2C_nibble(allControllers, 0x03);

+    udelay(T_INIT2);		/* 4 Bit mode, wait 100 us */

+    drv_HD_I2C_nibble(allControllers, 0x03);

+    udelay(T_INIT2);		/* 4 Bit mode, wait 4.1 ms */

+    drv_HD_I2C_nibble(allControllers, 0x02);

+    udelay(T_INIT2);		/* 4 Bit mode, wait 100 us */

+    drv_HD_I2C_command(allControllers, 0x28, T_EXEC);	/* 4 Bit mode, 1/16 duty cycle, 5x8 font */

+

+    info("%s: I2C initialization done", Name);

+

+    return 0;

+}

+

+

+static void drv_HD_I2C_stop(void)

+{

+    /* clear all signals */

+    drv_generic_i2c_data(0);

+

+    /* close port */

+    drv_generic_i2c_close();

+}

+

+/* END OF DISCLAIMER */

+

+#endif				/* WITH_I2C */

+

+

+/****************************************/

+/***  display dependant functions     ***/

+/****************************************/

+

+static void drv_HD_clear(void)

+{

+    drv_HD_command(allControllers, 0x01, T_CLEAR);	/* clear *all* displays */

+}

+

+

+static int drv_HD_goto(int row, int col)

+{

+    int pos, controller;

+

+    /* handle multiple controllers */

+    for (pos = 0, controller = 0; controller < numControllers; controller++) {

+	pos += CROWS[controller];

+	if (row < pos) {

+	    currController = (1 << controller);

+	    break;

+	}

+	row -= CROWS[controller];

+    }

+

+    /* column outside of current display's width */

+    if (col >= CCOLS[controller])

+	return -1;

+

+    if (0) {

+	debug("goto: [%d,%d] mask=%d, controller=%d, size:%dx%d", row, col, currController, controller, CROWS[controller], CCOLS[controller]);

+    }

+

+    /* 16x1 Displays are organized as 8x2 :-( */

+    if (CCOLS[controller] == 16 && CROWS[controller] == 1 && col > 7) {

+	row++;

+	col -= 8;

+    }

+

+    if (Capabilities & CAP_HD66712) {

+	/* the HD66712 doesn't have a braindamadged RAM layout */

+	pos = row * 32 + col;

+    } else {

+	/* 16x4 Controllers use a slightly different layout */

+	if (CCOLS[controller] == 16 && CROWS[controller] == 4) {

+	    pos = (row % 2) * 64 + (row / 2) * 16 + col;

+	} else {

+	    pos = (row % 2) * 64 + (row / 2) * 20 + col;

+	}

+    }

+    drv_HD_command(currController, (0x80 | pos), T_EXEC);

+

+    /* return columns left on current display */

+    return CCOLS[controller] - col;

+

+}

+

+

+static void drv_HD_write(const int row, const int col, const char *data, const int len)

+{

+    int space = drv_HD_goto(row, col);

+    if (space > 0) {

+	drv_HD_data(currController, data, len > space ? space : len, T_EXEC);

+    }

+}

+

+

+static void drv_HD_defchar(const int ascii, const unsigned char *matrix)

+{

+    int i;

+    char buffer[8];

+

+    for (i = 0; i < 8; i++) {

+	buffer[i] = matrix[i] & 0x1f;

+    }

+

+    /* define chars on *all* controllers! */

+    drv_HD_command(allControllers, 0x40 | 8 * ascii, T_EXEC);

+    drv_HD_data(allControllers, buffer, 8, T_WRCG);

+}

+

+

+static int drv_HD_backlight(int backlight)

+{

+    if (!(Capabilities & CAP_BACKLIGHT))

+	return -1;

+

+    if (backlight < 0)

+	backlight = 0;

+    if (backlight > 1)

+	backlight = 1;

+

+    drv_generic_parport_control(SIGNAL_BACKLIGHT, backlight ? SIGNAL_BACKLIGHT : 0);

+

+    return backlight;

+}

+

+

+static int drv_HD_brightness(int brightness)

+{

+    char cmd;

+

+    if (!(Capabilities & CAP_BRIGHTNESS))

+	return -1;

+

+    if (brightness < 0)

+	brightness = 0;

+    if (brightness > 3)

+	brightness = 3;

+

+    cmd = '0' + brightness;

+

+    drv_HD_command(allControllers, 0x38, T_EXEC);	/* enable function */

+    drv_HD_data(allControllers, &cmd, 1, T_WRCG);	/* set brightness */

+

+    return brightness;

+}

+

+

+/* Fixme: GPO's */

+#if 0

+static void drv_HD_setGPO(const int bits)

+{

+    if (Lcd.gpos > 0) {

+

+	/* put data on DB1..DB8 */

+	drv_generic_parport_data(bits);

+

+	/* 74HCT573 set-up time */

+	ndelay(20);

+

+	/* send data */

+	/* 74HCT573 enable pulse width = 24ns */

+	drv_generic_parport_toggle(SIGNAL_GPO, 1, 230);

+    }

+}

+#endif

+

+

+static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused)

+{

+    static unsigned char data = 0x00;

+

+    /* Bit 3+5 : key number */

+    /* Bit 6   : key press/release */

+    unsigned char mask3 = 1 << 3;

+    unsigned char mask5 = 1 << 5;

+    unsigned char mask6 = 1 << 6;

+    unsigned char mask = mask3 | mask5 | mask6;

+

+    int keynum;

+    int updown;

+

+    unsigned char temp;

+

+    temp = drv_generic_parport_status() & mask;

+

+    if (data != temp) {

+	data = temp;

+

+	keynum = (data & mask3 ? 1 : 0) + (data & mask5 ? 2 : 0);

+	updown = (data & mask6 ? 1 : 0);

+

+	debug("key %d press %d", keynum, updown);

+    }

+}

+

+

+static int drv_HD_start(const char *section, const int quiet)

+{

+    char *model, *size, *bus;

+    int rows = -1, cols = -1, gpos = -1, i;

+    int size_defined = 0;

+    int size_missing = 0;

+

+    model = cfg_get(section, "Model", "generic");

+    if (model != NULL && *model != '\0') {

+	int i;

+	for (i = 0; Models[i].type != 0xff; i++) {

+	    if (strcasecmp(Models[i].name, model) == 0)

+		break;

+	}

+	if (Models[i].type == 0xff) {

+	    error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());

+	    return -1;

+	}

+	Model = i;

+	Capabilities = Models[Model].capabilities;

+	info("%s: using model '%s'", Name, Models[Model].name);

+    } else {

+	error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());

+	if (model)

+	    free(model);

+	return -1;

+    }

+    free(model);

+

+    bus = cfg_get(section, "Bus", "parport");

+    if (bus == NULL && *bus == '\0') {

+	error("%s: empty '%s.Bus' entry from %s", Name, section, cfg_source());

+	if (bus)

+	    free(bus);

+	return -1;

+    }

+

+    if (strcasecmp(bus, "parport") == 0) {

+	info("%s: using parallel port", Name);

+	Bus = BUS_PP;

+	drv_HD_load = drv_HD_PP_load;

+	drv_HD_command = drv_HD_PP_command;

+	drv_HD_data = drv_HD_PP_data;

+	drv_HD_stop = drv_HD_PP_stop;

+

+    } else if (strcasecmp(bus, "i2c") == 0) {

+#ifdef WITH_I2C

+	info("%s: using I2C bus", Name);

+	Bus = BUS_I2C;

+	drv_HD_load = drv_HD_I2C_load;

+	drv_HD_command = drv_HD_I2C_command;

+	drv_HD_data = drv_HD_I2C_data;

+	drv_HD_stop = drv_HD_I2C_stop;

+#else

+	error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source());

+	error("%s: lcd4linux was compiled without i2c support!", Name);

+	free(bus);

+	return -1;

+#endif

+

+    } else {

+	error("%s: bad %s.Bus '%s' from %s, should be 'parport' or 'i2c'", Name, section, bus, cfg_source());

+	free(bus);

+	return -1;

+    }

+

+    /* sanity check: Model can use bus */

+    if (!(Capabilities & Bus)) {

+	error("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus);

+	free(bus);

+	return -1;

+    }

+    free(bus);

+

+    if (cfg_number(section, "Controllers", 1, 1, 4, (int *) &numControllers) < 0)

+	return -1;

+    info("%s: using %d Controller(s)", Name, numControllers);

+

+    /* current Controller */

+    currController = 1;

+

+    /* Bitmask for *all* Controllers */

+    allControllers = (1 << numControllers) - 1;

+

+

+    DCOLS = 0;

+    DROWS = 0;

+

+    for (i = 0; i < numControllers; i++) {

+	char key[6];

+	qprintf(key, sizeof(key), "Size%d", i + 1);

+	size = cfg_get(section, key, NULL);

+	if (size == NULL || *size == '\0') {

+	    size_missing++;

+	    free(size);

+	    continue;

+	}

+	if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {

+	    error("%s: bad %s.%s '%s' from %s", Name, section, key, size, cfg_source());

+	    free(size);

+	    return -1;

+	}

+	free(size);

+	CCOLS[i] = cols;

+	CROWS[i] = rows;

+	size_defined++;

+	info("%s: Controller %d: %dx%d", Name, i + 1, cols, rows);

+	/* grow the size */

+	if (cols > DCOLS)

+	    DCOLS = cols;

+	DROWS += rows;

+    }

+    if (size_defined && size_missing) {

+	error("%s: bad %s.Size* definition in %s:", Name, section, cfg_source());

+	error("%s: either you specify the size for *all* controllers or for none.", Name);

+	return -1;

+    }

+

+    size = cfg_get(section, "Size", NULL);

+    if (size != NULL && *size != '\0') {

+	if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {

+	    error("%s: bad %s.Size '%s' from %s", Name, section, size, cfg_source());

+	    free(size);

+	    return -1;

+	}

+	if (DCOLS == 0 && DROWS == 0) {

+	    for (i = 0; i < numControllers; i++) {

+		CCOLS[i] = cols;

+		CROWS[i] = rows / numControllers;

+		DCOLS = CCOLS[i];

+		DROWS += CROWS[i];

+	    }

+	}

+	if (rows != DROWS || cols != DCOLS) {

+	    error("%s: bad %s.Size definition in %s:", Name, section, cfg_source());

+	    error("%s: Size %dx%d should be %dx%d", Name, cols, rows, DCOLS, DROWS);

+	    return -1;

+	}

+    }

+    free(size);

+

+

+    if (cfg_number(section, "GPOs", 0, 0, 8, &gpos) < 0)

+	return -1;

+    if (gpos > 0 && !(Capabilities & CAP_GPO)) {

+	error("%s: Model '%s' does not support GPO's!", Name, Models[Model].name);

+	gpos = 0;

+    }

+    GPOS = gpos;

+    if (gpos > 0) {

+	info("%s: using %d GPO's", Name, GPOS);

+    }

+

+    if (drv_HD_load(section) < 0) {

+	error("%s: start display failed!", Name);

+	return -1;

+    }

+

+    drv_HD_command(allControllers, 0x08, T_EXEC);	/* Controller off, cursor off, blink off */

+    drv_HD_command(allControllers, 0x0c, T_CLEAR);	/* Display on, cursor off, blink off, wait 1.64 ms */

+    drv_HD_command(allControllers, 0x06, T_EXEC);	/* curser moves to right, no shift */

+

+    if ((Capabilities & CAP_HD66712) && DROWS > 2) {

+	drv_HD_command(allControllers, Bits == 8 ? 0x3c : 0x2c, T_EXEC);	/* set extended register enable bit */

+	drv_HD_command(allControllers, 0x09, T_EXEC);	/* set 4-line mode */

+	drv_HD_command(allControllers, Bits == 8 ? 0x38 : 0x28, T_EXEC);	/* clear extended register enable bit */

+    }

+

+    drv_HD_clear();		/* clear *all* displays */

+    drv_HD_command(allControllers, 0x03, T_CLEAR);	/* return home */

+

+    /* maybe set backlight */

+    if (Capabilities & CAP_BACKLIGHT) {

+	int backlight;

+	if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) {

+	    info("%s: backlight %s", Name, backlight ? "enabled" : "disabled");

+	    drv_HD_backlight(backlight);

+	}

+    }

+

+    /* maybe set brightness */

+    if (Capabilities & CAP_BRIGHTNESS) {

+	int brightness;

+	if (cfg_number(section, "Brightness", 0, 0, 3, &brightness) > 0) {

+	    info("%s: brightness level %d", Name, brightness);

+	    drv_HD_brightness(brightness);

+	}

+    }

+

+    /* install keypad polling timer for LCM-162 */

+    if (Capabilities & CAP_LCM162) {

+	timer_add(drv_HD_LCM162_timer, NULL, 10, 0);

+    }

+

+    if (!quiet) {

+	char buffer[40];

+	qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);

+	if (drv_generic_text_greet(buffer, NULL)) {

+	    sleep(3);

+	    drv_HD_clear();

+	}

+    }

+

+    return 0;

+}

+

+

+/****************************************/

+/***            plugins               ***/

+/****************************************/

+

+

+static void plugin_backlight(RESULT * result, RESULT * arg1)

+{

+    double backlight;

+

+    backlight = drv_HD_backlight(R2N(arg1));

+    SetResult(&result, R_NUMBER, &backlight);

+}

+

+

+static void plugin_brightness(RESULT * result, RESULT * arg1)

+{

+    double brightness;

+

+    brightness = drv_HD_brightness(R2N(arg1));

+    SetResult(&result, R_NUMBER, &brightness);

+}

+

+

+/****************************************/

+/***        widget callbacks          ***/

+/****************************************/

+

+

+/* using drv_generic_text_draw(W) */

+/* using drv_generic_text_icon_draw(W) */

+/* using drv_generic_text_bar_draw(W) */

+

+

+/****************************************/

+/***        exported functions        ***/

+/****************************************/

+

+

+/* list models */

+int drv_HD_list(void)

+{

+    int i;

+

+    for (i = 0; Models[i].type != 0xff; i++) {

+	printf("%s ", Models[i].name);

+    }

+    return 0;

+}

+

+

+/* initialize driver & display */

+int drv_HD_init(const char *section, const int quiet)

+{

+    WIDGET_CLASS wc;

+    int asc255bug;

+    int ret;

+

+    /* display preferences */

+    XRES = 5;			/* pixel width of one char  */

+    YRES = 8;			/* pixel height of one char  */

+    CHARS = 8;			/* number of user-defineable characters */

+    CHAR0 = 0;			/* ASCII of first user-defineable char */

+    GOTO_COST = 1;		/* number of bytes a goto command requires */

+

+    /* real worker functions */

+    drv_generic_text_real_write = drv_HD_write;

+    drv_generic_text_real_defchar = drv_HD_defchar;

+

+

+    /* start display */

+    if ((ret = drv_HD_start(section, quiet)) != 0)

+	return ret;

+

+    /* initialize generic text driver */

+    if ((ret = drv_generic_text_init(section, Name)) != 0)

+	return ret;

+

+    /* initialize generic icon driver */

+    if ((ret = drv_generic_text_icon_init()) != 0)

+	return ret;

+

+    /* initialize generic bar driver */

+    if ((ret = drv_generic_text_bar_init(0)) != 0)

+	return ret;

+

+    /* add fixed chars to the bar driver */

+    /* most displays have a full block on ascii 255, but some have kind of  */

+    /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */

+    /* char will not be used, but rendered by the bar driver */

+    cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);

+    drv_generic_text_bar_add_segment(0, 0, 255, 32);	/* ASCII  32 = blank */

+    if (!asc255bug)

+	drv_generic_text_bar_add_segment(255, 255, 255, 255);	/* ASCII 255 = block */

+

+    /* register text widget */

+    wc = Widget_Text;

+    wc.draw = drv_generic_text_draw;

+    widget_register(&wc);

+

+    /* register icon widget */

+    wc = Widget_Icon;

+    wc.draw = drv_generic_text_icon_draw;

+    widget_register(&wc);

+

+    /* register bar widget */

+    wc = Widget_Bar;

+    wc.draw = drv_generic_text_bar_draw;

+    widget_register(&wc);

+

+    /* register plugins */

+    if (Capabilities & CAP_BACKLIGHT) {

+	AddFunction("LCD::backlight", 1, plugin_backlight);

+    }

+    if (Capabilities & CAP_BRIGHTNESS) {

+	AddFunction("LCD::brightness", 1, plugin_brightness);

+    }

+

+    return 0;

+}

+

+

+/* close driver & display */

+int drv_HD_quit(const int quiet)

+{

+

+    info("%s: shutting down.", Name);

+

+    drv_generic_text_quit();

+

+    /* clear display */

+    drv_HD_clear();

+

+    /* say goodbye... */

+    if (!quiet) {

+	drv_generic_text_greet("goodbye!", NULL);

+    }

+

+    drv_HD_stop();

+

+    return (0);

+}

+

+

+DRIVER drv_HD44780 = {

+  name:Name,

+  list:drv_HD_list,

+  init:drv_HD_init,

+  quit:drv_HD_quit,

+};

diff --git a/drv_generic_i2c.c b/drv_generic_i2c.c
index 538b19a..22b4c72 100644
--- a/drv_generic_i2c.c
+++ b/drv_generic_i2c.c
@@ -1,164 +1,192 @@
-/* $Id: drv_generic_i2c.c,v 1.3 2005/05/08 04:32:44 reinelt Exp $
- *
- * generic driver helper for i2c displays
- *
- * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>
- * Copyright (C) 2005 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.
- *
- *
+/* $Id: drv_generic_i2c.c,v 1.4 2005/05/31 20:42:55 lfcorreia Exp $

+ *

+ * generic driver helper for i2c displays

+ *

+ * Copyright (C) 2005 Luis Correia <lfcorreia@users.sf.net>

+ * Copyright (C) 2005 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_i2c.c,v $
- * Revision 1.3  2005/05/08 04:32:44  reinelt
- * CodingStyle added and applied
- *
- * Revision 1.2  2005/04/05 05:12:57  reinelt
- * i2c patch from Paul (still does not work here :-(
- *
- * Revision 1.1  2005/03/28 19:39:23  reinelt
- * HD44780/I2C patch from Luis merged (still does not work for me)
+ * Revision 1.4  2005/05/31 20:42:55  lfcorreia
+ * new file: lcd4linux_i2c.h
+ * avoid the problems detecting the proper I2C kernel include files
  *
+ * rearrange all the other autoconf stuff to remove I2C detection
  *
- */
-
-#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>
-
-#include <linux/compiler.h>
-#include <linux/i2c.h>
-#include <linux/i2c-dev.h>
-
-#include "debug.h"
-#include "qprintf.h"
-#include "cfg.h"
-#include "udelay.h"
-#include "drv_generic_i2c.h"
-
-static char *Driver = "";
-static char *Section = "";
-static int i2c_device;
-
-static void my_i2c_smbus_write_byte_data(const int device, const unsigned char data)
-{
-    struct i2c_smbus_ioctl_data args;
-    args.read_write = I2C_SMBUS_WRITE;
-    args.command = data;
-    args.size = I2C_SMBUS_BYTE;
-    args.data = 0;
-    ioctl(device, I2C_SMBUS, &args);
-}
-
-static void my_i2c_smbus_read_byte_data(const int device, const unsigned char data)
-{
-    struct i2c_smbus_ioctl_data args;
-    args.read_write = I2C_SMBUS_READ;
-    args.command = data;
-    args.size = I2C_SMBUS_BYTE;
-    args.data = 0;
-    ioctl(device, I2C_SMBUS, &args);
-}
-
-int drv_generic_i2c_open(const char *section, const char *driver)
-{
-    int dev;
-    char *bus, *device;
-
-    //SIGNAL_ENABLE = 0x40;
-    //SIGNAL_RW = 0x10;
-    //SIGNAL_RS = 0x20;
-
-    udelay_init();
-
-    Section = (char *) section;
-    Driver = (char *) driver;
-
-    bus = cfg_get(Section, "Port", NULL);
-    device = cfg_get(Section, "Device", NULL);
-    dev = atoi(device);
-    info("%s: initializing I2C bus %s", Driver, bus);
-    info("device %d", dev);
-    if ((i2c_device = open(bus, O_WRONLY)) < 0) {
-	error("%s: I2C bus %s open failed !\n", Driver, bus);
-	return -1;
-    }
-
-    info("%s: initializing I2C slave device 0x%x", Driver, dev);
-    if (ioctl(i2c_device, I2C_SLAVE, dev) < 0) {
-	error("%s: error initializing device 0x%x\n", Driver, dev);
-	close(i2c_device);
-	return -1;
-    }
-
-    return 0;
-}
-
-
-int drv_generic_i2c_close(void)
-{
-
-    close(i2c_device);
-
-    return 0;
-}
-
-unsigned char drv_generic_i2c_wire(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]<==>[i2c:GND]", Driver, name);
-    } else {
-	info("%s: wiring: [DISPLAY:%s]<==>[i2c:DB%d]", Driver, name, w);
-    }
-
-    w = 1 << w;
-
-    return w;
-}
-
-void drv_generic_i2c_data(const unsigned char data)
-{
-
-    my_i2c_smbus_write_byte_data(i2c_device, data);
-
-}
+ * new method by Paul Kamphuis to write to the I2C device
+ *

+ * Revision 1.3  2005/05/08 04:32:44  reinelt

+ * CodingStyle added and applied

+ *

+ * Revision 1.2  2005/04/05 05:12:57  reinelt

+ * i2c patch from Paul (still does not work here :-(

+ *

+ * Revision 1.1  2005/03/28 19:39:23  reinelt

+ * HD44780/I2C patch from Luis merged (still does not work for me)

+ *

+ *

+ */

+

+

+    /*

+        DISCLAIMER!!!!

+		

+		The following code is WORK IN PROGRESS, since it basicly 'works for us...'

+

+		(C) 2005 Paul Kamphuis & Luis Correia

+

+		We have removed all of the delays from this code, as the I2C bus is slow enough...

+		(maximum possible speed is 100KHz only)

+

+	*/

+

+

+#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>

+

+#include "lcd4linux_i2c.h"

+#include "debug.h"

+#include "qprintf.h"

+#include "cfg.h"

+#include "udelay.h"

+#include "drv_generic_i2c.h"

+

+static char *Driver = "";

+static char *Section = "";

+static int i2c_device;

+

+static void my_i2c_smbus_write_byte_data(const int device, const unsigned char val)

+{

+    struct i2c_smbus_ioctl_data args;

+    union i2c_smbus_data data;

+    args.read_write = I2C_SMBUS_WRITE;

+    args.command = val;

+    args.size = I2C_SMBUS_BYTE_DATA;

+    data.byte = val;

+    args.data = &data;

+

+    if (ioctl(device, I2C_SMBUS, &args) < 0) {

+	info("I2C: device %s IOCTL failed !\n", device);

+	}

+

+}

+

+static void my_i2c_smbus_read_byte_data(const int device, const unsigned char data)

+{

+    struct i2c_smbus_ioctl_data args;

+    args.read_write = I2C_SMBUS_READ;

+    args.command = data;

+    args.size = I2C_SMBUS_BYTE;

+    args.data = 0;

+    ioctl(device, I2C_SMBUS, &args);

+}

+

+int drv_generic_i2c_open(const char *section, const char *driver)

+{

+    int dev;

+    char *bus, *device;

+

+    udelay_init();

+

+    Section = (char *) section;

+    Driver = (char *) driver;

+

+    bus = cfg_get(Section, "Port", NULL);

+    device = cfg_get(Section, "Device", NULL);

+    dev = atoi(device);

+    info("%s: initializing I2C bus %s", Driver, bus);

+    info("device %d", dev);

+    if ((i2c_device = open(bus, O_WRONLY)) < 0) {

+	error("%s: I2C bus %s open failed !\n", Driver, bus);

+	return -1;

+    }

+

+    info("%s: initializing I2C slave device 0x%x", Driver, dev);

+    if (ioctl(i2c_device, I2C_SLAVE, dev) < 0) {

+	error("%s: error initializing device 0x%x\n", Driver, dev);

+	close(i2c_device);

+	return -1;

+    }

+

+    return 0;

+}

+

+

+int drv_generic_i2c_close(void)

+{

+

+    close(i2c_device);

+

+    return 0;

+}

+

+unsigned char drv_generic_i2c_wire(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]<==>[i2c:GND]", Driver, name);

+    } else {

+	info("%s: wiring: [DISPLAY:%s]<==>[i2c:DB%d]", Driver, name, w);

+    }

+

+    w = 1 << w;

+

+    return w;

+}

+

+void drv_generic_i2c_data(const unsigned char data)

+{

+

+    my_i2c_smbus_write_byte_data(i2c_device, data);

+

+}

+

+void drv_generic_i2c_command(const unsigned char command, const unsigned char *data, const unsigned char length)

+{

+

+    i2c_smbus_write_block_data(i2c_device,command,length,(unsigned char *)data);

+

+}

diff --git a/drv_generic_i2c.h b/drv_generic_i2c.h
index 64f4ed0..dd885be 100644
--- a/drv_generic_i2c.h
+++ b/drv_generic_i2c.h
@@ -1,64 +1,77 @@
-/* $Id: drv_generic_i2c.h,v 1.2 2005/05/08 04:32:44 reinelt Exp $
- *
- * generic driver helper for i2c displays
- *
- * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>
- * Copyright (C) 2005 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.
- *
- *
+/* $Id: drv_generic_i2c.h,v 1.3 2005/05/31 20:42:55 lfcorreia Exp $

+ *

+ * generic driver helper for i2c displays

+ *

+ * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>

+ * Copyright (C) 2005 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_i2c.h,v $
- * Revision 1.2  2005/05/08 04:32:44  reinelt
- * CodingStyle added and applied
- *
- * Revision 1.1  2005/03/28 19:39:23  reinelt
- * HD44780/I2C patch from Luis merged (still does not work for me)
- *
- *
- */
-
-/* 
- *
- * exported fuctions:
- *
- * int drv_generic_i2c_open (void)
- *   reads 'Port' entry from config and opens
- *   the i2c port
- *   returns 0 if ok, -1 on failure
- *
- * int drv_generic_i2c_close (void)
- *   closes i2c port
- *   returns 0 if ok, -1 on failure
- *
- * unsigned char drv_generic_i2c_wire (char *name, char *deflt)
- *   reads wiring for one data signal from config
- *   returns 1<<bitpos or 255 on error
- *
- * void drv_generic_i2c_data (unsigned char value)
- *   put data bits on DB1..DB8
- */
-
-#ifndef _DRV_GENERIC_I2C_H_
-#define _DRV_GENERIC_I2C_H_
-
-int drv_generic_i2c_open(const char *section, const char *driver);
-int drv_generic_i2c_close(void);
-unsigned char drv_generic_i2c_wire(const char *name, const char *deflt);
-void drv_generic_i2c_data(const unsigned char data);
-
-#endif
+ * Revision 1.3  2005/05/31 20:42:55  lfcorreia
+ * new file: lcd4linux_i2c.h
+ * avoid the problems detecting the proper I2C kernel include files
+ *
+ * rearrange all the other autoconf stuff to remove I2C detection
+ *
+ * new method by Paul Kamphuis to write to the I2C device
+ *

+ * Revision 1.2  2005/05/08 04:32:44  reinelt

+ * CodingStyle added and applied

+ *

+ * Revision 1.1  2005/03/28 19:39:23  reinelt

+ * HD44780/I2C patch from Luis merged (still does not work for me)

+ *

+ *

+ */

+

+/* 

+ *

+ * exported fuctions:

+ *

+ * int drv_generic_i2c_open (void)

+ *   reads 'Port' entry from config and opens

+ *   the i2c port

+ *   returns 0 if ok, -1 on failure

+ *

+ * int drv_generic_i2c_close (void)

+ *   closes i2c port

+ *   returns 0 if ok, -1 on failure

+ *

+ * unsigned char drv_generic_i2c_wire (char *name, char *deflt)

+ *   reads wiring for one data signal from config

+ *   returns 1<<bitpos or 255 on error

+ *

+ * void drv_generic_i2c_data (unsigned char value)

+ *   put data bits on DB1..DB8

+ *

+ * void drv_generic_i2c_command(unsigned char command, unsigned char *data,unsigned char length)

+ *   send command and the data to the i2c device

+ * 

+ */

+

+#ifndef _DRV_GENERIC_I2C_H_

+#define _DRV_GENERIC_I2C_H_

+

+int drv_generic_i2c_open(const char *section, const char *driver);

+int drv_generic_i2c_close(void);

+unsigned char drv_generic_i2c_wire(const char *name, const char *deflt);

+void drv_generic_i2c_data(const unsigned char data);

+void drv_generic_i2c_command(const unsigned char command, const unsigned char *data, const unsigned char length);

+

+#endif

diff --git a/lcd4linux_i2c.h b/lcd4linux_i2c.h
new file mode 100644
index 0000000..6980419
--- /dev/null
+++ b/lcd4linux_i2c.h
@@ -0,0 +1,643 @@
+/* $Id: lcd4linux_i2c.h,v 1.1 2005/05/31 20:42:55 lfcorreia Exp $

+ *

+ * user space i2c sturctures and defines, taken from the official kernel i2c 

+ * includes to solve the problem when compiling user space application

+ * (lcd4linux) with kernel space includes.

+ * Should be removed when the kernel team decides on how to solve this

+ * user space/kernel space compilation problem in kernel 2.8 or so.

+ *

+ * Copyright (C) 2005 Paul Kamphuis <pk_richman@users.sourceforge.net>

+ * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>

+ *

+ * taken from kernel includes i2c.h and i2c-dev.h to prevent using kernel includes

+ *   Copyright (C) 1995-2000 Simon G. Vogl

+ * With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and

+ *  Frodo Looijaard <frodol@dds.nl>

+ *

+ * 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: lcd4linux_i2c.h,v $
+ * Revision 1.1  2005/05/31 20:42:55  lfcorreia
+ * new file: lcd4linux_i2c.h
+ * avoid the problems detecting the proper I2C kernel include files
+ *
+ * rearrange all the other autoconf stuff to remove I2C detection
+ *
+ * new method by Paul Kamphuis to write to the I2C device
+ *

+ */

+

+#ifndef _LCD4LINUX_I2C_H

+#define _LCD4LINUX_I2C_H

+

+typedef signed int s32;

+typedef signed int __s32;

+typedef unsigned char u8;

+typedef unsigned short u16;

+typedef unsigned char __u8;

+typedef unsigned short __u16;

+typedef unsigned int u32;

+typedef unsigned int __u32;

+

+/* --- General options ------------------------------------------------	*/

+

+struct i2c_msg;

+struct i2c_algorithm;

+struct i2c_adapter;

+struct i2c_client;

+struct i2c_driver;

+struct i2c_client_address_data;

+union i2c_smbus_data;

+

+/*

+ * The master routines are the ones normally used to transmit data to devices

+ * on a bus (or read from them). Apart from two basic transfer functions to 

+ * transmit one message at a time, a more complex version can be used to 

+ * transmit an arbitrary number of messages without interruption.

+ */

+extern int i2c_master_send(struct i2c_client *,const char* ,int);

+extern int i2c_master_recv(struct i2c_client *,char* ,int);

+

+/* Transfer num messages.

+ */

+extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);

+

+/*

+ * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor. 

+ * This is not tested/implemented yet and will change in the future.

+ */

+extern int i2c_slave_send(struct i2c_client *,char*,int);

+extern int i2c_slave_recv(struct i2c_client *,char*,int);

+

+

+

+/* This is the very generalized SMBus access routine. You probably do not

+   want to use this, though; one of the functions below may be much easier,

+   and probably just as fast. 

+   Note that we use i2c_adapter here, because you do not need a specific

+   smbus adapter to call this function. */

+extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr, 

+                           unsigned short flags,

+                           char read_write, u8 command, int size,

+                           union i2c_smbus_data * data);

+

+/* Now follow the 'nice' access routines. These also document the calling

+   conventions of smbus_access. */

+/*

+extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);

+extern s32 i2c_smbus_read_byte(struct i2c_client * client);

+extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);

+extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);

+extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,

+                                     u8 command, u8 value);

+extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);

+extern s32 i2c_smbus_write_word_data(struct i2c_client * client,

+                                     u8 command, u16 value);

+*/

+/* Returns the number of bytes transferred */

+/*

+extern s32 i2c_smbus_write_block_data(struct i2c_client * client,

+				      u8 command, u8 length,

+				      u8 *values);

+extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,

+					 u8 command, u8 *values);

+*/

+

+/*

+ * A driver is capable of handling one or more physical devices present on

+ * I2C adapters. This information is used to inform the driver of adapter

+ * events.

+ */

+

+/*flags for the driver struct: */

+#define I2C_DF_NOTIFY	0x01		/* notify on bus (de/a)ttaches 	*/

+

+/*flags for the client struct: */

+#define I2C_CLIENT_ALLOW_USE		0x01	/* Client allows access */

+#define I2C_CLIENT_ALLOW_MULTIPLE_USE 	0x02  	/* Allow multiple access-locks */

+						/* on an i2c_client */

+#define I2C_CLIENT_PEC  0x04			/* Use Packet Error Checking */

+#define I2C_CLIENT_TEN	0x10			/* we have a ten bit chip address	*/

+						/* Must equal I2C_M_TEN below */

+

+/* i2c adapter classes (bitmask) */

+#define I2C_CLASS_HWMON		(1<<0)	/* lm_sensors, ... */

+#define I2C_CLASS_TV_ANALOG	(1<<1)	/* bttv + friends */

+#define I2C_CLASS_TV_DIGITAL	(1<<2)	/* dvb cards */

+#define I2C_CLASS_DDC		(1<<3)	/* i2c-matroxfb ? */

+#define I2C_CLASS_CAM_ANALOG	(1<<4)	/* camera with analog CCD */

+#define I2C_CLASS_CAM_DIGITAL	(1<<5)	/* most webcams */

+#define I2C_CLASS_SOUND		(1<<6)	/* sound devices */

+#define I2C_CLASS_ALL		(UINT_MAX) /* all of the above */

+

+/* i2c_client_address_data is the struct for holding default client

+ * addresses for a driver and for the parameters supplied on the

+ * command line

+ */

+struct i2c_client_address_data {

+	unsigned short *normal_i2c;

+	unsigned short *normal_i2c_range;

+	unsigned short *probe;

+	unsigned short *probe_range;

+	unsigned short *ignore;

+	unsigned short *ignore_range;

+	unsigned short *force;

+};

+

+/* Internal numbers to terminate lists */

+#define I2C_CLIENT_END		0xfffe

+#define I2C_CLIENT_ISA_END	0xfffefffe

+

+/* The numbers to use to set I2C bus address */

+#define ANY_I2C_BUS		0xffff

+#define ANY_I2C_ISA_BUS		9191

+

+/* The length of the option lists */

+#define I2C_CLIENT_MAX_OPTS 48

+

+

+/* ----- functions exported by i2c.o */

+

+/* administration...

+ */

+extern int i2c_add_adapter(struct i2c_adapter *);

+extern int i2c_del_adapter(struct i2c_adapter *);

+

+extern int i2c_add_driver(struct i2c_driver *);

+extern int i2c_del_driver(struct i2c_driver *);

+

+extern int i2c_attach_client(struct i2c_client *);

+extern int i2c_detach_client(struct i2c_client *);

+

+/* New function: This is to get an i2c_client-struct for controlling the 

+   client either by using i2c_control-function or having the 

+   client-module export functions that can be used with the i2c_client

+   -struct. */

+extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id, 

+					struct i2c_client *prev);

+

+/* Should be used with new function

+   extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);

+   to make sure that client-struct is valid and that it is okay to access

+   the i2c-client. 

+   returns -EACCES if client doesn't allow use (default)

+   returns -EBUSY if client doesn't allow multiple use (default) and 

+   usage_count >0 */

+extern int i2c_use_client(struct i2c_client *);

+extern int i2c_release_client(struct i2c_client *);

+

+/* call the i2c_client->command() of all attached clients with

+ * the given arguments */

+extern void i2c_clients_command(struct i2c_adapter *adap,

+				unsigned int cmd, void *arg);

+

+/* returns -EBUSY if address has been taken, 0 if not. Note that the only

+   other place at which this is called is within i2c_attach_client; so

+   you can cheat by simply not registering. Not recommended, of course! */

+extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);

+

+/* Detect function. It iterates over all possible addresses itself.

+ * It will only call found_proc if some client is connected at the

+ * specific address (unless a 'force' matched);

+ */

+extern int i2c_probe(struct i2c_adapter *adapter, 

+		struct i2c_client_address_data *address_data,

+		int (*found_proc) (struct i2c_adapter *, int, int));

+

+/* An ioctl like call to set div. parameters of the adapter.

+ */

+extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);

+

+/* This call returns a unique low identifier for each registered adapter,

+ * or -1 if the adapter was not registered. 

+ */

+extern int i2c_adapter_id(struct i2c_adapter *adap);

+extern struct i2c_adapter* i2c_get_adapter(int id);

+extern void i2c_put_adapter(struct i2c_adapter *adap);

+

+

+/* Return the functionality mask */

+extern u32 i2c_get_functionality (struct i2c_adapter *adap);

+

+/* Return 1 if adapter supports everything we need, 0 if not. */

+extern int i2c_check_functionality (struct i2c_adapter *adap, u32 func);

+

+/*

+ * I2C Message - used for pure i2c transaction, also from /dev interface

+ */

+struct i2c_msg {

+	__u16 addr;	/* slave address			*/

+ 	__u16 flags;		

+#define I2C_M_TEN	0x10	/* we have a ten bit chip address	*/

+#define I2C_M_RD	0x01

+#define I2C_M_NOSTART	0x4000

+#define I2C_M_REV_DIR_ADDR	0x2000

+#define I2C_M_IGNORE_NAK	0x1000

+#define I2C_M_NO_RD_ACK		0x0800

+ 	__u16 len;		/* msg length				*/

+ 	__u8 *buf;		/* pointer to msg data			*/

+};

+

+/* To determine what functionality is present */

+

+#define I2C_FUNC_I2C			0x00000001

+#define I2C_FUNC_10BIT_ADDR		0x00000002

+#define I2C_FUNC_PROTOCOL_MANGLING	0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */

+#define I2C_FUNC_SMBUS_HWPEC_CALC	0x00000008 /* SMBus 2.0 */

+#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC  0x00000800 /* SMBus 2.0 */ 

+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */ 

+#define I2C_FUNC_SMBUS_PROC_CALL_PEC	0x00002000 /* SMBus 2.0 */

+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */

+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL	0x00008000 /* SMBus 2.0 */

+#define I2C_FUNC_SMBUS_QUICK		0x00010000 

+#define I2C_FUNC_SMBUS_READ_BYTE	0x00020000 

+#define I2C_FUNC_SMBUS_WRITE_BYTE	0x00040000 

+#define I2C_FUNC_SMBUS_READ_BYTE_DATA	0x00080000 

+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA	0x00100000 

+#define I2C_FUNC_SMBUS_READ_WORD_DATA	0x00200000 

+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA	0x00400000 

+#define I2C_FUNC_SMBUS_PROC_CALL	0x00800000 

+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA	0x01000000 

+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000 

+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK	0x04000000 /* I2C-like block xfer  */

+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK	0x08000000 /* w/ 1-byte reg. addr. */

+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2	 0x10000000 /* I2C-like block xfer  */

+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */

+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC  0x40000000 /* SMBus 2.0 */

+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */

+

+#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \

+                            I2C_FUNC_SMBUS_WRITE_BYTE

+#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \

+                                 I2C_FUNC_SMBUS_WRITE_BYTE_DATA

+#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \

+                                 I2C_FUNC_SMBUS_WRITE_WORD_DATA

+#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \

+                                  I2C_FUNC_SMBUS_WRITE_BLOCK_DATA

+#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \

+                                  I2C_FUNC_SMBUS_WRITE_I2C_BLOCK

+#define I2C_FUNC_SMBUS_I2C_BLOCK_2 I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \

+                                   I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2

+#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \

+                                      I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC

+#define I2C_FUNC_SMBUS_WORD_DATA_PEC  I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \

+                                      I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC

+

+#define I2C_FUNC_SMBUS_READ_BYTE_PEC		I2C_FUNC_SMBUS_READ_BYTE_DATA

+#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC		I2C_FUNC_SMBUS_WRITE_BYTE_DATA

+#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC	I2C_FUNC_SMBUS_READ_WORD_DATA

+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC	I2C_FUNC_SMBUS_WRITE_WORD_DATA

+#define I2C_FUNC_SMBUS_BYTE_PEC			I2C_FUNC_SMBUS_BYTE_DATA

+#define I2C_FUNC_SMBUS_BYTE_DATA_PEC		I2C_FUNC_SMBUS_WORD_DATA

+

+#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \

+                            I2C_FUNC_SMBUS_BYTE | \

+                            I2C_FUNC_SMBUS_BYTE_DATA | \

+                            I2C_FUNC_SMBUS_WORD_DATA | \

+                            I2C_FUNC_SMBUS_PROC_CALL | \

+                            I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \

+                            I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \

+                            I2C_FUNC_SMBUS_I2C_BLOCK

+

+/* 

+ * Data for SMBus Messages 

+ */

+#define I2C_SMBUS_BLOCK_MAX	32	/* As specified in SMBus standard */	

+#define I2C_SMBUS_I2C_BLOCK_MAX	32	/* Not specified but we use same structure */

+union i2c_smbus_data {

+	__u8 byte;

+	__u16 word;

+	__u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */

+                          /* one more for read length in block process call */

+	                                            /* and one more for PEC */

+};

+

+/* smbus_access read or write markers */

+#define I2C_SMBUS_READ	1

+#define I2C_SMBUS_WRITE	0

+

+/* SMBus transaction types (size parameter in the above functions) 

+   Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */

+#define I2C_SMBUS_QUICK		    0

+#define I2C_SMBUS_BYTE		    1

+#define I2C_SMBUS_BYTE_DATA	    2 

+#define I2C_SMBUS_WORD_DATA	    3

+#define I2C_SMBUS_PROC_CALL	    4

+#define I2C_SMBUS_BLOCK_DATA	    5

+#define I2C_SMBUS_I2C_BLOCK_DATA    6

+#define I2C_SMBUS_BLOCK_PROC_CALL   7		/* SMBus 2.0 */

+#define I2C_SMBUS_BLOCK_DATA_PEC    8		/* SMBus 2.0 */

+#define I2C_SMBUS_PROC_CALL_PEC     9		/* SMBus 2.0 */

+#define I2C_SMBUS_BLOCK_PROC_CALL_PEC  10	/* SMBus 2.0 */

+#define I2C_SMBUS_WORD_DATA_PEC	   11		/* SMBus 2.0 */

+

+

+/* ----- commands for the ioctl like i2c_command call:

+ * note that additional calls are defined in the algorithm and hw 

+ *	dependent layers - these can be listed here, or see the 

+ *	corresponding header files.

+ */

+				/* -> bit-adapter specific ioctls	*/

+#define I2C_RETRIES	0x0701	/* number of times a device address      */

+				/* should be polled when not            */

+                                /* acknowledging 			*/

+#define I2C_TIMEOUT	0x0702	/* set timeout - call with int 		*/

+

+

+/* this is for i2c-dev.c	*/

+#define I2C_SLAVE	0x0703	/* Change slave address			*/

+				/* Attn.: Slave address is 7 or 10 bits */

+#define I2C_SLAVE_FORCE	0x0706	/* Change slave address			*/

+				/* Attn.: Slave address is 7 or 10 bits */

+				/* This changes the address, even if it */

+				/* is already taken!			*/

+#define I2C_TENBIT	0x0704	/* 0 for 7 bit addrs, != 0 for 10 bit	*/

+

+#define I2C_FUNCS	0x0705	/* Get the adapter functionality */

+#define I2C_RDWR	0x0707	/* Combined R/W transfer (one stop only)*/

+#define I2C_PEC		0x0708	/* != 0 for SMBus PEC                   */

+#if 0

+#define I2C_ACK_TEST	0x0710	/* See if a slave is at a specific address */

+#endif

+

+#define I2C_SMBUS	0x0720	/* SMBus-level access */

+

+/* ... algo-bit.c recognizes */

+#define I2C_UDELAY	0x0705	/* set delay in microsecs between each	*/

+				/* written byte (except address)	*/

+#define I2C_MDELAY	0x0706	/* millisec delay between written bytes */

+

+/* ----- I2C-DEV: char device interface stuff ------------------------- */

+

+#define I2C_MAJOR	89		/* Device major number		*/

+

+/* These defines are used for probing i2c client addresses */

+/* Default fill of many variables */

+#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \

+                          I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}

+

+/* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is 

+   stringified */

+#define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"

+#define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)

+#define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)

+

+/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the

+   module header */

+

+#define I2C_CLIENT_MODULE_PARM(var,desc) \

+  static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \

+  static unsigned int var##_num; \

+  /*MODULE_PARM(var,I2C_CLIENT_MODPARM);*/ \

+  module_param_array(var, short, &var##_num, 0); \

+  MODULE_PARM_DESC(var,desc)

+

+/* This is the one you want to use in your own modules */

+#define I2C_CLIENT_INSMOD \

+  I2C_CLIENT_MODULE_PARM(probe, \

+                      "List of adapter,address pairs to scan additionally"); \

+  I2C_CLIENT_MODULE_PARM(probe_range, \

+                      "List of adapter,start-addr,end-addr triples to scan " \

+                      "additionally"); \

+  I2C_CLIENT_MODULE_PARM(ignore, \

+                      "List of adapter,address pairs not to scan"); \

+  I2C_CLIENT_MODULE_PARM(ignore_range, \

+                      "List of adapter,start-addr,end-addr triples not to " \

+                      "scan"); \

+  I2C_CLIENT_MODULE_PARM(force, \

+                      "List of adapter,address pairs to boldly assume " \

+                      "to be present"); \

+	static struct i2c_client_address_data addr_data = {		\

+			.normal_i2c = 		normal_i2c,		\

+			.normal_i2c_range =	normal_i2c_range,	\

+			.probe =		probe,			\

+			.probe_range =		probe_range,		\

+			.ignore =		ignore,			\

+			.ignore_range =		ignore_range,		\

+			.force =		force,			\

+		}

+

+/* Detect whether we are on the isa bus. If this returns true, all i2c

+   access will fail! */

+#define i2c_is_isa_client(clientptr) \

+        ((clientptr)->adapter->algo->id == I2C_ALGO_ISA)

+#define i2c_is_isa_adapter(adapptr) \

+        ((adapptr)->algo->id == I2C_ALGO_ISA)

+

+

+/* Some IOCTL commands are defined in <linux/i2c.h> */

+/* Note: 10-bit addresses are NOT supported! */

+

+/* This is the structure as used in the I2C_SMBUS ioctl call */

+struct i2c_smbus_ioctl_data {

+        __u8 read_write;

+        __u8 command;

+        __u32 size;

+        union i2c_smbus_data *data;

+};

+

+/* This is the structure as used in the I2C_RDWR ioctl call */

+struct i2c_rdwr_ioctl_data {

+        struct i2c_msg *msgs;    /* pointers to i2c_msgs */

+        __u32 nmsgs;                    /* number of i2c_msgs */

+};

+

+#define  I2C_RDRW_IOCTL_MAX_MSGS        42

+

+#include <sys/ioctl.h>

+

+static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command, 

+                                     int size, union i2c_smbus_data *data)

+{

+	struct i2c_smbus_ioctl_data args;

+

+	args.read_write = read_write;

+	args.command = command;

+	args.size = size;

+	args.data = data;

+	return ioctl(file,I2C_SMBUS,&args);

+}

+

+

+static inline __s32 i2c_smbus_write_quick(int file, __u8 value)

+{

+	return i2c_smbus_access(file,value,0,I2C_SMBUS_QUICK,NULL);

+}

+	

+static inline __s32 i2c_smbus_read_byte(int file)

+{

+	union i2c_smbus_data data;

+	if (i2c_smbus_access(file,I2C_SMBUS_READ,0,I2C_SMBUS_BYTE,&data))

+		return -1;

+	else

+		return 0x0FF & data.byte;

+}

+

+static inline __s32 i2c_smbus_write_byte(int file, __u8 value)

+{

+	return i2c_smbus_access(file,I2C_SMBUS_WRITE,value,

+	                        I2C_SMBUS_BYTE,NULL);

+}

+

+static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)

+{

+	union i2c_smbus_data data;

+	if (i2c_smbus_access(file,I2C_SMBUS_READ,command,

+	                     I2C_SMBUS_BYTE_DATA,&data))

+		return -1;

+	else

+		return 0x0FF & data.byte;

+}

+

+static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command, 

+                                              __u8 value)

+{

+	union i2c_smbus_data data;

+	data.byte = value;

+	return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,

+	                        I2C_SMBUS_BYTE_DATA, &data);

+}

+

+static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)

+{

+	union i2c_smbus_data data;

+	if (i2c_smbus_access(file,I2C_SMBUS_READ,command,

+	                     I2C_SMBUS_WORD_DATA,&data))

+		return -1;

+	else

+		return 0x0FFFF & data.word;

+}

+

+static inline __s32 i2c_smbus_write_word_data(int file, __u8 command, 

+                                              __u16 value)

+{

+	union i2c_smbus_data data;

+	data.word = value;

+	return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,

+	                        I2C_SMBUS_WORD_DATA, &data);

+}

+

+static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)

+{

+	union i2c_smbus_data data;

+	data.word = value;

+	if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,

+	                     I2C_SMBUS_PROC_CALL,&data))

+		return -1;

+	else

+		return 0x0FFFF & data.word;

+}

+

+

+/* Returns the number of read bytes */

+static inline __s32 i2c_smbus_read_block_data(int file, __u8 command, 

+                                              __u8 *values)

+{

+	union i2c_smbus_data data;

+	int i;

+	if (i2c_smbus_access(file,I2C_SMBUS_READ,command,

+	                     I2C_SMBUS_BLOCK_DATA,&data))

+		return -1;

+	else {

+		for (i = 1; i <= data.block[0]; i++)

+			values[i-1] = data.block[i];

+		return data.block[0];

+	}

+}

+

+static inline __s32 i2c_smbus_write_block_data(int file, __u8 command, 

+                                               __u8 length, __u8 *values)

+{

+	union i2c_smbus_data data;

+	int i;

+	if (length > 32)

+		length = 32;

+	for (i = 1; i <= length; i++)

+		data.block[i] = values[i-1];

+	data.block[0] = length;

+	return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,

+	                        I2C_SMBUS_BLOCK_DATA, &data);

+}

+

+/* Returns the number of read bytes */

+static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command,

+                                                  __u8 *values)

+{

+	union i2c_smbus_data data;

+	int i;

+	if (i2c_smbus_access(file,I2C_SMBUS_READ,command,

+	                      I2C_SMBUS_I2C_BLOCK_DATA,&data))

+		return -1;

+	else {

+		for (i = 1; i <= data.block[0]; i++)

+			values[i-1] = data.block[i];

+		return data.block[0];

+	}

+}

+

+static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command,

+                                               __u8 length, __u8 *values)

+{

+	union i2c_smbus_data data;

+	int i;

+	if (length > 32)

+		length = 32;

+	for (i = 1; i <= length; i++)

+		data.block[i] = values[i-1];

+	data.block[0] = length;

+	return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,

+	                        I2C_SMBUS_I2C_BLOCK_DATA, &data);

+}

+

+/* Returns the number of read bytes */

+static inline __s32 i2c_smbus_block_process_call(int file, __u8 command,

+                                                 __u8 length, __u8 *values)

+{

+	union i2c_smbus_data data;

+	int i;

+	if (length > 32)

+		length = 32;

+	for (i = 1; i <= length; i++)

+		data.block[i] = values[i-1];

+	data.block[0] = length;

+	if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,

+	                     I2C_SMBUS_BLOCK_PROC_CALL,&data))

+		return -1;

+	else {

+		for (i = 1; i <= data.block[0]; i++)

+			values[i-1] = data.block[i];

+		return data.block[0];

+	}

+}

+

+

+#endif /* _LCD4LINUX_I2C_H */