Initial revisionXORG-RELEASE-1-BASEXEVIE-MERGEXEVIE-BASE

2 files changed, 1831 insertions, 0 deletions

diff --git a/man/elographics.man b/man/elographics.man
new file mode 100644
index 0000000..4e78d67
--- /dev/null
+++ b/man/elographics.man
@@ -0,0 +1,40 @@
+.\" $XFree86: xc/programs/Xserver/hw/xfree86/input/elographics/elographics.man,v 1.2 2001/01/27 18:20:57 dawes Exp $
+.\" shorthand for double quote that works everywhere.
+.ds q \N'34'
+.TH ELOGRAPHICS __drivermansuffix__ __vendorversion__
+.SH NAME
+elographics \- Elographics input driver
+.SH SYNOPSIS
+.B "Section \*qInputDevice\*q"
+.br
+.BI "  Identifier \*q" idevname \*q
+.br
+.B  "  Driver \*qelographics\*q"
+.br
+.BI "  Option \*qDevice\*q   \*q" devpath \*q
+.br
+\ \ ...
+.br
+.B EndSection
+.SH DESCRIPTION
+.B elographics 
+is an XFree86 input driver for Elographics devices...
+.PP
+The
+.B elographics
+driver functions as a pointer input device, and may be used as the
+X server's core pointer.
+THIS MAN PAGE NEEDS TO BE FILLED IN.
+.SH SUPPORTED HARDWARE
+What is supported...
+.SH CONFIGURATION DETAILS
+Please refer to XF86Config(__filemansuffix__) for general configuration
+details and for options that can be used with all input drivers.  This
+section only covers configuration details specific to this driver.
+.PP
+Config details...
+.SH "SEE ALSO"
+XFree86(1), XF86Config(__filemansuffix__), xf86config(1), Xserver(1), X(__miscmansuffix__).
+.SH AUTHORS
+Authors include...
+ Patrick Lecoanet
diff --git a/src/xf86Elo.c b/src/xf86Elo.c
new file mode 100644
index 0000000..8c57432
--- /dev/null
+++ b/src/xf86Elo.c
@@ -0,0 +1,1791 @@
+/* $XConsortium: xf86Elo.c /main/13 1996/10/25 14:11:31 kaleb $ */
+/*
+ * Copyright 1995, 1999 by Patrick Lecoanet, France. <lecoanet@cena.dgac.fr>
+ *                                                                            
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is  hereby granted without fee, provided that
+ * the  above copyright   notice appear  in   all  copies and  that both  that
+ * copyright  notice   and   this  permission   notice  appear  in  supporting
+ * documentation, and that   the  name of  Patrick  Lecoanet not  be  used  in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific,  written      prior  permission.     Patrick Lecoanet   makes  no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.                   
+ *                                                                            
+ * PATRICK LECOANET DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT  SHALL PATRICK LECOANET BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA  OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS  ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/* $XFree86: xc/programs/Xserver/hw/xfree86/input/elographics/xf86Elo.c,v 1.14 2001/08/17 13:27:56 dawes Exp $ */
+
+/*
+ *******************************************************************************
+ *******************************************************************************
+ *
+ * This driver is able to deal with Elographics SmartSet serial controllers.
+ * It uses only a subset of the functions provided through the protocol.
+ *
+ * SUPPORT FOR E281-2310 and compatible controllers added with help of:
+ *   1996/01/17 Juergen P. Meier (jpm@mailserv.rz.fh-muenchen.de) and
+ *   1998/03/25 G.Felkel@edelmann.de
+ *  
+ *   The E281-2310 is a somewhat lobotomized 2210.
+ *   It does not support the c,g,h,k,l,p,q,s and t commands.
+ *   Especially the P command, which is used to check the baud rate.
+ *   The E281-2310 however semms to use always 9600bps, 8bit, 1stop
+ *   no parity, Hardwarehandshake (RTS-CTS) (which are the drivers
+ *   default values)
+ *
+ *******************************************************************************
+ *******************************************************************************
+ */
+
+#include "xf86Version.h"
+#if XF86_VERSION_CURRENT >= XF86_VERSION_NUMERIC(3,9,0,0,0)
+#define XFREE86_V4
+#endif
+
+#ifdef XFREE86_V4
+
+#ifndef XFree86LOADER
+#include <unistd.h>
+#include <errno.h>
+#endif
+
+#include "misc.h"
+#include "xf86.h"
+#if !defined(DGUX)
+#include "xf86_ansic.h"
+#endif
+#include "xf86_OSproc.h"
+#include "xf86Xinput.h"
+#include "exevents.h"
+
+#ifdef XFree86LOADER
+#include "xf86Module.h"
+#endif
+
+#else /* XFREE86_V4 */
+
+#include "Xos.h"
+#include <signal.h>
+#include <stdio.h>
+
+#define	 NEED_EVENTS
+#include "X.h"
+#include "Xproto.h"
+#include "inputstr.h"
+#include "scrnintstr.h"
+#include "XI.h"
+#include "XIproto.h"
+
+#if defined(sun) && !defined(i386)
+#include <errno.h>
+#include <termio.h>
+#include <fcntl.h>
+#include <ctype.h>
+
+#include "extio.h"
+#else /* defined(sun) && !defined(i386) */
+#include "compiler.h"
+
+#include "xf86.h"
+#include "xf86Procs.h"
+#include "xf86_OSlib.h"
+#include "xf86_Config.h"
+#include "xf86Xinput.h"
+#endif /* defined(sun) && !defined(i386) */
+
+#if !defined(sun) || defined(i386)
+#include "os.h"
+#include "osdep.h"
+#include "exevents.h"
+
+#include "extnsionst.h"
+#include "extinit.h"
+#endif /* !defined(sun) || defined(i386) */
+
+#endif /* XFREE86_V4 */
+
+
+#ifndef XFREE86_V4
+#if !defined(sun) || defined(i386)
+/*
+ ***************************************************************************
+ *
+ * Configuration descriptor.
+ *
+ ***************************************************************************
+ */
+
+#define PORT		1
+#define ELO_DEVICE_NAME	2
+#define SCREEN_NO	3
+#define UNTOUCH_DELAY	4
+#define REPORT_DELAY	5
+#define MAXX		6
+#define MAXY		7
+#define MINX		8
+#define MINY		9
+#define DEBUG_LEVEL     10
+#define HISTORY_SIZE	11
+#define LINK_SPEED	12
+#define ALWAYS_CORE	13
+#define SWAP_AXES	14
+#define PORTRAIT_MODE	15
+
+static SymTabRec EloTab[] = {
+  { ENDSUBSECTION,     "endsubsection" },
+  { PORT,              "port" },
+  { ELO_DEVICE_NAME,   "devicename" },
+  { SCREEN_NO,	       "screenno" },
+  { UNTOUCH_DELAY,     "untouchdelay" },
+  { REPORT_DELAY,      "reportdelay"},
+  { MAXX,              "maximumxposition" },
+  { MAXY,              "maximumyposition" },
+  { MINX,              "minimumxposition" },
+  { MINY,              "minimumyposition" },
+  { DEBUG_LEVEL,       "debuglevel" },
+  { HISTORY_SIZE,      "historysize" },
+  { LINK_SPEED,        "linkspeed" },
+  { ALWAYS_CORE,       "alwayscore" },
+  { SWAP_AXES,	       "swapxy" },
+  { PORTRAIT_MODE,     "portraitmode" },
+  { -1,                "" },
+};
+
+#define LS300		1
+#define LS1200		2
+#define LS2400		3
+#define LS9600		4
+#define LS19200		5
+
+static SymTabRec LinkSpeedTab[] = {
+  { LS300,	"b300" },
+  { LS1200,	"b1200" },
+  { LS2400,	"b2400" },
+  { LS9600,	"b9600" },
+  { LS19200,	"b19200" }
+};
+#endif /* !defined(sun) || defined(i386) */
+
+/*
+ * This struct connects a line speed with
+ * a compatible motion packet delay. The
+ * driver will attempt to enforce a correct
+ * delay (according to this table) in order to
+ * avoid losing data in the touchscreen controller.
+ * LinkSpeedValues should be kept in sync with
+ * LinkSpeedTab.
+ */
+typedef struct {
+  int	speed;
+  int	delay;
+} LinkParameterStruct;
+
+static LinkParameterStruct	LinkSpeedValues[] = {
+  { B300, 32 },
+  { B1200, 8 },
+  { B2400, 4 },
+  { B9600, 1 },
+  { B19200, 0 }
+};
+#endif /* XFREE86_V4 */
+
+
+/*
+ ***************************************************************************
+ *
+ * Default constants.
+ *
+ ***************************************************************************
+ */
+#define ELO_MAX_TRIALS	3		/* Number of timeouts waiting for a	*/
+					/* pending reply.			*/
+#define ELO_MAX_WAIT		100000	/* Max wait time for a reply (microsec)	*/
+#define ELO_UNTOUCH_DELAY	5	/* 100 ms				*/
+#define ELO_REPORT_DELAY	1	/* 40 ms or 25 motion reports/s		*/
+#define ELO_LINK_SPEED		B9600	/* 9600 Bauds				*/
+#define ELO_PORT		"/dev/ttyS1"
+
+#define DEFAULT_MAX_X		3000
+#define DEFAULT_MIN_X		600
+#define DEFAULT_MAX_Y		3000
+#define DEFAULT_MIN_Y		600
+
+
+/*
+ ***************************************************************************
+ *
+ * Protocol constants.
+ *
+ ***************************************************************************
+ */
+#define ELO_PACKET_SIZE		10
+
+#define ELO_SYNC_BYTE		'U'	/* Sync byte. First of a packet.	*/
+#define ELO_TOUCH		'T'	/* Report of touchs and motions. Not	*
+					 * used by 2310.			*/
+#define ELO_OWNER		'O'	/* Report vendor name.			*/
+#define ELO_ID			'I'	/* Report of type and features.		*/
+#define ELO_MODE		'M'	/* Set current operating mode.		*/
+#define ELO_PARAMETER		'P'	/* Set the serial parameters.		*/
+#define ELO_REPORT		'B'	/* Set touch reports timings.		*/
+#define ELO_ACK			'A'	/* Acknowledge packet			*/
+
+#define ELO_INIT_CHECKSUM	0xAA	/* Initial value of checksum.		*/
+
+#define	ELO_PRESS		0x01	/* Flags in ELO_TOUCH status byte	*/
+#define	ELO_STREAM		0x02
+#define ELO_RELEASE		0x04
+
+#define ELO_TOUCH_MODE		0x01	/* Flags in ELO_MODE command		*/
+#define ELO_STREAM_MODE		0x02
+#define ELO_UNTOUCH_MODE	0x04
+#define ELO_RANGE_CHECK_MODE	0x40
+#define ELO_TRIM_MODE		0x02
+#define ELO_CALIB_MODE		0x04
+#define ELO_SCALING_MODE	0x08
+#define ELO_TRACKING_MODE	0x40
+
+#define ELO_SERIAL_SPEED	0x06	/* Flags for high speed serial (19200)	*/
+#define ELO_SERIAL_MASK		0xF8
+
+#define ELO_SERIAL_IO		'0'	/* Indicator byte for PARAMETER command */
+
+
+/*
+ ***************************************************************************
+ *
+ * Usefull macros.
+ *
+ ***************************************************************************
+ */
+#define WORD_ASSEMBLY(byte1, byte2)	(((byte2) << 8) | (byte1))
+#define SYSCALL(call)			while(((call) == -1) && (errno == EINTR))
+
+/* This one is handy, thanx Fred ! */
+#ifdef DBG
+#undef DBG
+#endif
+#ifdef DEBUG
+#undef DEBUG
+#endif
+
+static int      debug_level = 0;
+#define DEBUG 1
+#if DEBUG
+#define DBG(lvl, f) {if ((lvl) <= debug_level) f;}
+#else
+#define DBG(lvl, f)
+#endif
+
+#ifdef XFREE86_V4
+#undef SYSCALL
+#undef read
+#undef write
+#undef close
+#define SYSCALL(call) call
+#define read(fd, ptr, num) xf86ReadSerial(fd, ptr, num)
+#define write(fd, ptr, num) xf86WriteSerial(fd, ptr, num)
+#define close(fd) xf86CloseSerial(fd)
+#endif
+
+
+/*
+ ***************************************************************************
+ *
+ * Device private records.
+ *
+ ***************************************************************************
+ */
+typedef struct _EloPrivateRec {
+  char		*input_dev;		/* The touchscreen input tty			*/
+  int		min_x;			/* Minimum x reported by calibration		*/
+  int		max_x;			/* Maximum x					*/
+  int		min_y;			/* Minimum y reported by calibration		*/
+  int		max_y;			/* Maximum y					*/
+  int		untouch_delay;		/* Delay before reporting an untouch (in ms)    */
+  int		report_delay;		/* Delay between touch report packets		*/
+#ifndef XFREE86_V4
+  int		link_speed;		/* Speed of the RS232 link connecting the ts.	*/
+#endif
+  int		screen_no;		/* Screen associated with the device		*/
+  int		screen_width;		/* Width of the associated X screen		*/
+  int		screen_height;		/* Height of the screen				*/
+  Bool		inited;			/* The controller has already been configured ?	*/
+  Bool		is_a_2310;		/* Set if the smartset is a 2310.		*/
+  int		checksum;		/* Current checksum of data in assembly buffer	*/
+  int		packet_buf_p;		/* Assembly buffer pointer			*/
+  int		swap_axes;		/* Swap X an Y axes if != 0 */
+  unsigned char	packet_buf[ELO_PACKET_SIZE]; /* Assembly buffer				*/
+} EloPrivateRec, *EloPrivatePtr;
+
+
+#ifndef XFREE86_V4
+#if !defined(sun) || defined(i386)
+/*
+ ***************************************************************************
+ *
+ * xf86EloConfig --
+ *	Configure the driver from the configuration data.
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloConfig(LocalDevicePtr    *array,
+              int               inx,
+              int               max,
+	      LexPtr            val)
+{
+  LocalDevicePtr        local = array[inx];
+  EloPrivatePtr         priv = (EloPrivatePtr)(local->private);
+  int                   token;
+  int			portrait=0;
+  
+  while ((token = xf86GetToken(EloTab)) != ENDSUBSECTION) {
+    switch(token) {
+      
+    case PORT:
+      if (xf86GetToken(NULL) != STRING) {
+	xf86ConfigError("Elographics input port expected");
+      }
+      priv->input_dev = strdup(val->str);	
+      if (xf86Verbose) {
+	ErrorF("%s Elographics input port: %s\n",
+	       XCONFIG_GIVEN, priv->input_dev);
+      }
+      break;
+
+    case ELO_DEVICE_NAME:
+      if (xf86GetToken(NULL) != STRING) {
+	xf86ConfigError("Elographics device name expected");
+      }
+      local->name = strdup(val->str);
+      if (xf86Verbose) {
+	ErrorF("%s Elographics X device name: %s\n",
+	       XCONFIG_GIVEN, local->name);
+      }
+      break;
+
+    case SCREEN_NO:
+      if (xf86GetToken(NULL) != NUMBER) {
+	xf86ConfigError("Elographics screen number expected");
+      }
+      priv->screen_no = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics associated screen: %d\n",
+	       XCONFIG_GIVEN, priv->screen_no);
+      }
+      break;
+
+    case UNTOUCH_DELAY:
+      if (xf86GetToken(NULL) != NUMBER) {
+	xf86ConfigError("Elographics untouch delay expected");
+      }
+      priv->untouch_delay = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics untouch delay: %d ms\n",
+	       XCONFIG_GIVEN, priv->untouch_delay*10);
+      }
+      break;
+
+    case REPORT_DELAY:
+      if (xf86GetToken(NULL) != NUMBER) {
+	xf86ConfigError("Elographics report delay expected");
+      }
+      priv->report_delay = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics report delay: %d ms\n",
+	       XCONFIG_GIVEN, priv->report_delay*10);
+      }
+      break;
+      
+    case LINK_SPEED:
+      {
+	int	ltoken = xf86GetToken(LinkSpeedTab);
+	if (ltoken == EOF ||
+	    ltoken == STRING ||
+	    ltoken == NUMBER) {
+	  xf86ConfigError("Elographics link speed expected");
+	}
+	priv->link_speed = LinkSpeedValues[ltoken-1].speed;
+	if (xf86Verbose) {
+	  ErrorF("%s Elographics link speed: %s bps\n",
+		 XCONFIG_GIVEN, (LinkSpeedTab[ltoken-1].name)+1);
+	}
+      }
+      break;
+      
+    case MAXX:
+      if (xf86GetToken(NULL) != NUMBER) {
+        xf86ConfigError("Elographics maximum x position expected");
+      }
+      priv->max_x = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics maximum x position: %d\n",
+	       XCONFIG_GIVEN, priv->max_x);
+      }
+     break;
+      
+    case MAXY:
+      if (xf86GetToken(NULL) != NUMBER) {
+        xf86ConfigError("Elographics maximum y position expected");
+      }
+      priv->max_y = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics maximum y position: %d\n",
+	       XCONFIG_GIVEN, priv->max_y);
+      }
+     break;
+      
+    case MINX:
+      if (xf86GetToken(NULL) != NUMBER) {
+        xf86ConfigError("Elographics minimum x position expected");
+      }
+      priv->min_x = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics minimum x position: %d\n",
+	       XCONFIG_GIVEN, priv->min_x);
+      }
+     break;
+      
+    case MINY:
+      if (xf86GetToken(NULL) != NUMBER) {
+        xf86ConfigError("Elographics minimum y position expected");
+      }
+      priv->min_y = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics minimum y position: %d\n",
+	       XCONFIG_GIVEN, priv->min_y);
+      }
+     break;
+      
+    case DEBUG_LEVEL:
+      if (xf86GetToken(NULL) != NUMBER) {
+	xf86ConfigError("Elographics driver debug level expected");
+      }
+      debug_level = val->num;
+      if (xf86Verbose) {
+#if DEBUG
+	ErrorF("%s Elographics debug level sets to %d\n", XCONFIG_GIVEN,
+	       debug_level);      
+#else
+	ErrorF("%s Elographics debug not available\n",
+	       XCONFIG_GIVEN, debug_level);      
+#endif
+      }
+      break;
+
+    case HISTORY_SIZE:
+      if (xf86GetToken(NULL) != NUMBER) {
+	xf86ConfigError("Elographics motion history size expected");
+      }
+      local->history_size = val->num;
+      if (xf86Verbose) {
+	ErrorF("%s EloGraphics motion history size is %d\n", XCONFIG_GIVEN,
+	       local->history_size);
+      }
+      break;
+	    
+    case ALWAYS_CORE:
+      xf86AlwaysCore(local, TRUE);
+      if (xf86Verbose) {
+	ErrorF("%s Elographics device will always stays core pointer\n",
+	       XCONFIG_GIVEN);
+      }
+      break;
+
+    case SWAP_AXES:
+      priv->swap_axes = 1;
+      if (xf86Verbose) {
+	ErrorF("%s Elographics device will work with X and Y axes swapped\n",
+	       XCONFIG_GIVEN);
+      }      
+      break;
+
+    case PORTRAIT_MODE:
+      if (xf86GetToken(NULL) != STRING) {
+      portrait_mode_err:
+	xf86ConfigError("Elographics portrait mode should be: Portrait, Landscape or PortraitCCW");
+      }
+      if (strcmp(val->str, "portrait") == 0) {
+	portrait = 1;
+      }
+      else if (strcmp(val->str, "portraitccw") == 0) {
+	portrait = -1;
+      }
+      else if (strcmp(val->str, "landscape") != 0) {
+	goto portrait_mode_err;
+      }
+      if (xf86Verbose) {
+	ErrorF("%s Elographics device will work in %s mode\n",
+	       XCONFIG_GIVEN, val->str);
+      }      
+      break;
+
+    case EOF:
+      FatalError("Unexpected EOF (missing EndSubSection)");
+      break;
+
+    default:
+      xf86ConfigError("Elographics subsection keyword expected");
+      break;
+    }
+  }
+
+  if (priv->max_x - priv->min_x <= 0) {
+    ErrorF("%s Elographics: reverse x mode (minimum x position >= maximum x position)\n",
+	   XCONFIG_GIVEN);
+  }  
+  if (priv->max_y - priv->min_y <= 0) {
+    ErrorF("%s Elographics: reverse y mode (minimum y position >= maximum y position)\n",
+	   XCONFIG_GIVEN);
+  }
+  /*
+   * The portrait adjustments need to be done after axis reversing
+   * and axes swap. This way the driver can cope with deffective
+   * hardware and still do the correct processing depending on the
+   * actual display orientation.
+   */
+  if (portrait == 1) {
+    /*
+     * Portrait Clockwise: reverse Y axis and exchange X and Y.
+     */
+    int tmp;
+    tmp = priv->min_y;
+    priv->min_y = priv->max_y;
+    priv->max_y = tmp;
+    priv->swap_axes = (priv->swap_axes==0) ? 1 : 0;
+  }
+  else if (portrait == -1) {
+    /*
+     * Portrait Counter Clockwise: reverse X axis and exchange X and Y.
+     */
+    int tmp;
+    tmp = priv->min_x;
+    priv->min_x = priv->max_x;
+    priv->max_x = tmp;
+    priv->swap_axes = (priv->swap_axes==0) ? 1 : 0;
+  }
+    
+  DBG(2, ErrorF("xf86EloConfig port name=%s\n", priv->input_dev))
+
+  return Success;
+}
+#endif
+#endif
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloGetPacket --
+ *	Read a packet from the port. Try to synchronize with start of
+ *	packet and compute checksum.
+ *      The packet structure read by this function is as follow:
+ *		Byte 0 : ELO_SYNC_BYTE
+ *		Byte 1
+ *		...
+ *		Byte 8 : packet data
+ *		Byte 9 : checksum of bytes 0 to 8
+ *
+ *	This function returns if a valid packet has been assembled in
+ *	buffer or if no more data is available.
+ *
+ *	Returns Success if a packet is successfully assembled including
+ *	testing checksum. If a packet checksum is incorrect, it is discarded.
+ *	Bytes preceding the ELO_SYNC_BYTE are also discarded.
+ *	Returns !Success if out of data while reading. The start of the
+ *	partially assembled packet is left in buffer, buffer_p and
+ *	checksum reflect the current state of assembly.
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloGetPacket(unsigned char	*buffer,
+		 int		*buffer_p,
+		 int		*checksum,
+		 int		fd)
+{
+  int	num_bytes;
+  Bool	ok;
+
+  DBG(4, ErrorF("Entering xf86EloGetPacket with checksum == %d and buffer_p == %d\n",
+		*checksum, *buffer_p));
+  
+  /*
+   * Try to read enough bytes to fill up the packet buffer.
+   */
+  DBG(4, ErrorF("buffer_p is %d, Trying to read %d bytes from link\n",
+		*buffer_p, ELO_PACKET_SIZE - *buffer_p));
+  SYSCALL(num_bytes = read(fd,
+			   (char *) (buffer + *buffer_p),
+			   ELO_PACKET_SIZE - *buffer_p));
+
+  /*
+   * Okay, give up.
+   */
+  if (num_bytes < 0) {
+    Error("System error while reading from Elographics touchscreen.");
+    return !Success;
+  }
+  DBG(4, ErrorF("Read %d bytes\n", num_bytes));
+    
+  while (num_bytes) {
+    /*
+     * Sync with the start of a packet.
+     */
+    if ((*buffer_p == 0) && (buffer[0] != ELO_SYNC_BYTE)) {
+      /*
+       * No match, shift data one byte toward the start of the buffer.
+       */
+      ErrorF("Elographics: Dropping one byte in an attempt to synchronize: '%c' 0x%X\n",
+	     buffer[0], buffer[0]);
+      memcpy(&buffer[0], &buffer[1], num_bytes-1);
+    }
+    else {
+      /*
+       * Compute checksum in assembly buffer.
+       */
+      if (*buffer_p < ELO_PACKET_SIZE-1) {
+	*checksum = *checksum + buffer[*buffer_p];
+	*checksum = *checksum % 256;
+	DBG(4, ErrorF(" 0x%X-->0x%X ", buffer[*buffer_p], *checksum));
+      }
+      (*buffer_p)++;
+    }
+    num_bytes--;
+  }
+
+  if (*buffer_p == ELO_PACKET_SIZE) {
+    /*
+     * Got a packet, validate checksum and reset state.
+     */
+    ok = (*checksum == buffer[ELO_PACKET_SIZE-1]);
+    DBG(3, ErrorF("Expecting checksum %d, got %d\n", *checksum, buffer[ELO_PACKET_SIZE-1]));
+    *checksum = ELO_INIT_CHECKSUM;
+    *buffer_p = 0;
+
+    if (!ok) {
+      ErrorF("Checksum error on Elographics touchscreen link\n");
+      return !Success;
+    }
+    
+    /*
+     * Valid packet received report it.
+     */
+    return Success;
+  }
+  else {
+    return !Success;
+  }
+}
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloConvert --
+ *	Convert extended valuators to x and y suitable for core motion
+ *	events. Return True if ok and False if the requested conversion
+ *	can't be done for the specified valuators.
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloConvert(LocalDevicePtr	local,
+	       int		first,
+	       int		num,
+	       int		v0,
+	       int		v1,
+	       int		v2,
+	       int		v3,
+	       int		v4,
+	       int		v5,
+	       int		*x,
+	       int		*y)
+{
+  EloPrivatePtr	priv = (EloPrivatePtr) local->private;
+  int		width = priv->max_x - priv->min_x;
+  int		height = priv->max_y - priv->min_y;
+  int		input_x, input_y;
+  
+  if (first != 0 || num != 2) {
+    return FALSE;
+  }
+
+  DBG(3, ErrorF("EloConvert: v0(%d), v1(%d)\n",	v0, v1));
+
+  if (priv->swap_axes) {
+    input_x = v1;
+    input_y = v0;
+  }
+  else {
+    input_x = v0;
+    input_y = v1;
+  }
+  *x = (priv->screen_width * (input_x - priv->min_x)) / width;
+  *y = (priv->screen_height -
+	(priv->screen_height * (input_y - priv->min_y)) / height);
+  
+#ifdef XFREE86_V4
+  /*
+   * Need to check if still on the correct screen.
+   * This call is here so that this work can be done after
+   * calib and before posting the event.
+   */
+  xf86XInputSetScreen(local, priv->screen_no, *x, *y);
+#endif
+  
+  DBG(3, ErrorF("EloConvert: x(%d), y(%d)\n",	*x, *y));
+
+  return TRUE;
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloReadInput --
+ *	Read all pending report packets from the touchscreen and enqueue
+ *	them.
+ *	If a packet is not fully received it is deferred until the next
+ *	call to the function.
+ *	Packets recognized by this function comply with the format:
+ *
+ *		Byte 1 :  ELO_TOUCH
+ *		Byte 2 :  Packet type
+ *		  Bit 2 : Pen Up   (Release)
+ *		  Bit 1 : Position (Stream)
+ *		  Bit 0 : Pen Down (Press)
+ *		Byte 3 :  X coordinate (lower bits)
+ *		Byte 4 :  X coordinate (upper bits)
+ *		Byte 5 :  Y coordinate (lower bits)
+ *		Byte 6 :  Y coordinate (upper bits)
+ *		Byte 7 :  Z coordinate (lower bits)
+ *		Byte 8 :  Z coordinates (upper bits)
+ *
+ *
+ ***************************************************************************
+ */
+static void
+xf86EloReadInput(LocalDevicePtr	local)
+{
+  EloPrivatePtr			priv = (EloPrivatePtr)(local->private);
+  int				cur_x, cur_y;
+  int				state;
+
+  DBG(4, ErrorF("Entering ReadInput\n"));
+  /*
+   * Try to get a packet.
+   */
+  if (xf86EloGetPacket(priv->packet_buf,
+		       &priv->packet_buf_p,
+		       &priv->checksum,
+		       local->fd) != Success) {
+    return;
+  }
+
+  /*
+   * Process only ELO_TOUCHs here.
+   */
+  if (priv->packet_buf[1] == ELO_TOUCH) {
+    /*
+     * First stick together the various pieces.
+     */
+    cur_x = WORD_ASSEMBLY(priv->packet_buf[3], priv->packet_buf[4]);
+    cur_y = WORD_ASSEMBLY(priv->packet_buf[5], priv->packet_buf[6]);
+    state = priv->packet_buf[2] & 0x07;
+
+    /*
+     * Send events.
+     *
+     * We *must* generate a motion before a button change if pointer
+     * location has changed as DIX assumes this. This is why we always
+     * emit a motion, regardless of the kind of packet processed.
+     */
+    xf86PostMotionEvent(local->dev, TRUE, 0, 2, cur_x, cur_y);
+    
+    /*
+     * Emit a button press or release.
+     */
+    if (state == ELO_PRESS || state == ELO_RELEASE) {
+      xf86PostButtonEvent(local->dev, TRUE, 1, state == ELO_PRESS, 0, 2, cur_x, cur_y);
+    }
+    
+    DBG(3, ErrorF("TouchScreen: x(%d), y(%d), %s\n",
+		  cur_x, cur_y,
+		  (state == ELO_PRESS) ? "Press" : ((state == ELO_RELEASE) ? "Release" : "Stream")));
+  }
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloSendPacket --
+ *	Emit an height bytes packet to the controller.
+ *	The function expects a valid buffer containing the
+ *	command to be sent to the controller. It fills it with the
+ *	leading sync character an the trailing checksum byte.
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloSendPacket(unsigned char	*packet,
+		  int		fd)
+{
+  int	i, result;
+  int	sum = ELO_INIT_CHECKSUM;
+
+  packet[0] = ELO_SYNC_BYTE;
+  for (i = 0; i < ELO_PACKET_SIZE-1; i++) {
+    sum += packet[i];
+    sum &= 0xFF;
+  }
+  packet[ELO_PACKET_SIZE-1] = sum;
+
+  DBG(4, ErrorF("Sending packet : 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X \n",
+		packet[0], packet[1], packet[2], packet[3], packet[4],
+		packet[5], packet[6], packet[7], packet[8], packet[9]));
+  SYSCALL(result = write(fd, packet, ELO_PACKET_SIZE));
+  if (result != ELO_PACKET_SIZE) {
+    DBG(5, ErrorF("System error while sending to Elographics touchscreen.\n"));
+    return !Success;
+  }
+  else {
+    return Success;
+  }
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloWaitReply --
+ *	It is assumed that the reply will be in the few next bytes
+ *	read and will be available very soon after the query post. if
+ *	these two asumptions are not met, there are chances that the server
+ *	will be stuck for a while.
+ *	The reply type need to match parameter 'type'.
+ *	The reply is left in reply. The function returns Success if the
+ *	reply is valid and !Success otherwise.
+ *
+ ***************************************************************************
+ */
+#ifndef XFREE86_V4
+static int
+xf86WaitForInput(int	fd,
+		 int	timeout)
+{
+  fd_set	readfds;
+  struct	timeval to;
+  int		r;
+  
+  FD_ZERO(&readfds);
+  FD_SET(fd, &readfds);
+  to.tv_sec = 0;
+  to.tv_usec = timeout;
+  
+  SYSCALL(r = select(FD_SETSIZE, &readfds, NULL, NULL, &to));
+  return r;
+}
+#endif
+
+static Bool
+xf86EloWaitReply(unsigned char	type,
+		 unsigned char	*reply,
+		 int		fd)
+{
+  Bool			ok;
+  int			i, result;
+  int			reply_p = 0;
+  int			sum = ELO_INIT_CHECKSUM;
+
+  DBG(4, ErrorF("Waiting a '%c' reply\n", type));
+  i = ELO_MAX_TRIALS;
+  do {
+    ok = !Success;
+    
+    /*
+     * Wait half a second for the reply. The fuse counts down each
+     * timeout and each wrong packet.
+     */
+    DBG(4, ErrorF("Waiting %d ms for data from port\n", ELO_MAX_WAIT / 1000));
+    result = xf86WaitForInput(fd, ELO_MAX_WAIT);
+    if (result > 0) {
+      ok = xf86EloGetPacket(reply, &reply_p, &sum, fd);
+      /*
+       * Do not report an error on a 'P' query as the controller
+       * might be a 2310.
+       */
+      if (ok == Success && reply[1] != type && type != ELO_PARAMETER) {
+	DBG(3, ErrorF("Wrong reply received\n"));
+	ok = !Success;
+      }
+    }
+    else {
+      DBG(3, ErrorF("No answer from link : %d\n", result));
+    }
+    
+    if (result == 0) {
+      i--;
+    }
+  } while(ok != Success && i);
+
+  return ok;
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloWaitAck --
+ *	Wait for an acknowledge from the controller. Returns Success if
+ *	acknowledge received and reported no errors.
+ *
+  ***************************************************************************
+ */
+static Bool
+xf86EloWaitAck(int	fd)
+{
+  unsigned char	packet[ELO_PACKET_SIZE];
+  int		i, nb_errors;
+
+  if (xf86EloWaitReply(ELO_ACK, packet, fd) == Success) {
+    for (i = 0, nb_errors = 0; i < 4; i++) {
+      if (packet[2 + i] != '0') {
+	nb_errors++;
+      }
+    }
+    if (nb_errors != 0) {
+      DBG(2, ErrorF("Elographics acknowledge packet reports %d errors\n",
+		    nb_errors));
+    }
+    return Success;
+    /*    return (nb_errors < 4) ? Success : !Success;*/
+  }
+  else {
+    return !Success;
+  }
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloSendQuery --
+ *	Emit a query to the controller and blocks until the reply and
+ *	the acknowledge are read.
+ *
+ *	The reply is left in reply. The function returns Success if the
+ *	reply is valid and !Success otherwise.
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloSendQuery(unsigned char	*request,
+		 unsigned char	*reply,
+		 int		fd)
+{
+  Bool			ok;
+  
+  if (xf86EloSendPacket(request, fd) == Success) {
+    ok = xf86EloWaitReply(toupper(request[1]), reply, fd);
+    if (ok == Success) {
+      ok = xf86EloWaitAck(fd);
+    }
+    return ok;
+  }
+  else {
+    return !Success;
+  }
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloSendControl --
+ *	Emit a control command to the controller and wait for acknowledge.
+ *
+ *	Returns Success if acknowledge received and reported no error.
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloSendControl(unsigned char	*control,
+		   int			fd)
+{
+  if (xf86EloSendPacket(control, fd) == Success) {
+    return xf86EloWaitAck(fd);
+  }
+  else {
+    return !Success;
+  }
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloPrintIdent --
+ *	Print type of touchscreen and features on controller board.
+ *
+ ***************************************************************************
+ */
+static void
+xf86EloPrintIdent(unsigned char	*packet,
+		  EloPrivatePtr	priv)
+{
+#ifdef XFREE86_V4
+  xf86Msg(X_PROBED, "Elographics touchscreen is a ");
+  switch(packet[2]) {
+  case '0':
+    xf86Msg(X_NONE, "AccuTouch");
+    break;
+  case '1':
+    xf86Msg(X_NONE, "DuraTouch");
+    break;
+  case '2':
+    xf86Msg(X_NONE, "Intellitouch");
+    break;
+  }
+  xf86Msg(X_NONE, ", connected through a ");
+  switch(packet[3]) {
+  case '0':
+    xf86Msg(X_NONE, "serial link.\n");
+    break;
+  case '1':
+    xf86Msg(X_NONE, "PC-Bus port.\n");
+    break;
+  case '2':
+    xf86Msg(X_NONE, "Micro Channel port.\n");
+    break;
+  }
+  xf86Msg(X_PROBED, "The controller is a model ");
+  if (packet[8] & 1) {
+    if (priv->is_a_2310) {
+      xf86Msg(X_NONE, "E281-2310");
+    }
+    else {
+      xf86Msg(X_NONE, "E271-2210");
+    }
+  }
+  else {
+    xf86Msg(X_NONE, "E271-2200");
+  }
+  xf86Msg(X_NONE, ", firmware revision %d.%d.\n", packet[6], packet[5]);
+  
+  if (packet[4]) {
+    xf86Msg(X_PROBED, " Additional features:\n");
+    if (packet[4] & 0x10) {
+      xf86Msg(X_PROBED, "	External A/D converter\n");
+    }
+    if (packet[4] & 0x20) {
+      xf86Msg(X_PROBED, "	32Ko RAM\n");
+    }
+    if (packet[4] & 0x40) {
+      xf86Msg(X_PROBED, "	RAM onboard\n");
+    }
+    if (packet[4] & 0x80) {
+      xf86Msg(X_PROBED, "	Z axis active\n");
+    }
+    xf86Msg(X_NONE, "\n");
+  }
+#else
+  ErrorF("%s Elographics touchscreen is a ", XCONFIG_PROBED);
+  switch(packet[2]) {
+  case '0':
+    ErrorF("AccuTouch");
+    break;
+  case '1':
+    ErrorF("DuraTouch");
+    break;
+  case '2':
+    ErrorF("Intellitouch");
+    break;
+  }
+  ErrorF(", connected through a ");
+  switch(packet[3]) {
+  case '0':
+    ErrorF("serial link.\n");
+    break;
+  case '1':
+    ErrorF("PC-Bus port.\n");
+    break;
+  case '2':
+    ErrorF("Micro Channel port.\n");
+    break;
+  }
+  ErrorF("%s The controller is a model ", XCONFIG_PROBED);
+  if (packet[8] & 1) {
+    if (priv->is_a_2310) {
+      ErrorF("E281-2310");
+    }
+    else {
+      ErrorF("E271-2210");
+    }
+  }
+  else {
+    ErrorF("E271-2200");
+  }
+  ErrorF(", firmware revision %d.%d.\n", packet[6], packet[5]);
+  
+  if (packet[4]) {
+    ErrorF("%s Additional features:\n", XCONFIG_PROBED);
+    if (packet[4] & 0x10) {
+      ErrorF("%s	External A/D converter\n", XCONFIG_PROBED);
+    }
+    if (packet[4] & 0x20) {
+      ErrorF("%s	32Ko RAM\n", XCONFIG_PROBED);
+    }
+    if (packet[4] & 0x40) {
+      ErrorF("%s	RAM onboard\n", XCONFIG_PROBED);
+    }
+    if (packet[4] & 0x80) {
+      ErrorF("%s	Z axis active\n", XCONFIG_PROBED);
+    }
+    ErrorF("\n");
+  }
+#endif
+}
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloPtrControl --
+ *
+ ***************************************************************************
+ */
+#if 0
+static void
+xf86EloPtrControl(DeviceIntPtr	dev,
+		  PtrCtrl	*ctrl)
+{
+}
+#endif
+
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloControl --
+ *
+ ***************************************************************************
+ */
+static Bool
+xf86EloControl(DeviceIntPtr	dev,
+	       int		mode)
+{
+  LocalDevicePtr	local = (LocalDevicePtr) dev->public.devicePrivate;
+  EloPrivatePtr		priv = (EloPrivatePtr)(local->private);
+  unsigned char		map[] = { 0, 1 };
+  unsigned char		req[ELO_PACKET_SIZE];
+  unsigned char		reply[ELO_PACKET_SIZE];
+
+  switch(mode) {
+
+  case DEVICE_INIT:
+    {
+#if defined(sun) && !defined(i386) && !defined(XFREE86_V4)
+      char      *name = (char *) getenv("ELO_DEV");
+      char      *calib = (char *) getenv("ELO_CALIB");
+      char	*speed = (char *) getenv("ELO_SPEED");
+      char	*delays = (char *) getenv("ELO_DELAYS");
+#endif
+      
+      DBG(2, ErrorF("Elographics touchscreen init...\n"));
+
+#if defined(sun) && !defined(i386) && !defined(XFREE86_V4)
+      if (name) {
+	priv->input_dev = strdup(name);
+	ErrorF("Elographics touchscreen port changed to '%s'\n",
+	       priv->input_dev);
+      }
+      if (calib) {
+	if (sscanf(calib, "%d %d %d %d",
+		   &priv->min_x, &priv->max_x,
+		   &priv->min_y, &priv->max_y) != 4) {
+	  ErrorF("Incorrect syntax in ELO_CALIB\n");
+	  return !Success;
+	}
+	else if (priv->max_x <= priv->min_x ||
+		 priv->max_y <= priv->min_y) {
+	  ErrorF("Bogus calibration data in ELO_CALIB\n");
+	  return !Success;
+	}
+	else {
+	  ErrorF("Calibration will be done with:\n");
+	  ErrorF("x_min=%d, x_max=%d, y_min=%d, y_max=%d\n",
+		 priv->min_x, priv->max_x, priv->min_y, priv->max_y);
+	}
+      }
+      if (speed) {
+	/* These tests should be kept in sync with the LinkSpeedValues
+	 * array. */
+	if (strcmp(speed, "B9600") == 0) {
+	  priv->link_speed = B9600;
+	}
+	else if (strcmp(speed, "B19200") == 0) {
+	  priv->link_speed = B19200;
+	}
+	else if (strcmp(speed, "B2400") == 0) {
+	  priv->link_speed = B2400;
+	}
+	else if (strcmp(speed, "B1200") == 0) {
+	  priv->link_speed = B1200;
+	}
+	else if (strcmp(speed, "B300") == 0) {
+	  priv->link_speed = B300;
+	}
+	else {
+	  ErrorF("Bogus speed value in ELO_SPEED\n");
+	  return !Success;
+	}
+      }
+      if (delays) {
+	if (sscanf(delays, "%d %d",
+		   &priv->untouch_delay,
+		   &priv->report_delay) != 2) {
+	  ErrorF("Bogus delays data in ELO_DELAYS\n");
+	}
+	else {
+	  ErrorF("Untouch delay will be: %d\n", priv->untouch_delay);
+	  ErrorF("Report delay will be: %d\n", priv->report_delay);
+	}
+      }
+#endif
+      
+      if (priv->screen_no >= screenInfo.numScreens ||
+	  priv->screen_no < 0) {
+	priv->screen_no = 0;
+      }
+      priv->screen_width = screenInfo.screens[priv->screen_no]->width;
+      priv->screen_height = screenInfo.screens[priv->screen_no]->height;
+
+      /*
+       * Device reports button press for up to 1 button.
+       */
+      if (InitButtonClassDeviceStruct(dev, 1, map) == FALSE) {
+	ErrorF("Unable to allocate Elographics touchscreen ButtonClassDeviceStruct\n");
+	return !Success;
+      }
+      
+      if (InitFocusClassDeviceStruct(dev) == FALSE) {
+	ErrorF("Unable to allocate Elographics touchscreen FocusClassDeviceStruct\n");
+	return !Success;
+      }
+      
+      /*
+       * Device reports motions on 2 axes in absolute coordinates.
+       * Axes min and max values are reported in raw coordinates.
+       * Resolution is computed roughly by the difference between
+       * max and min values scaled from the approximate size of the
+       * screen to fit one meter.
+       */
+      if (InitValuatorClassDeviceStruct(dev, 2, xf86GetMotionEvents,
+					local->history_size, Absolute) == FALSE) {
+	ErrorF("Unable to allocate Elographics touchscreen ValuatorClassDeviceStruct\n");
+	return !Success;
+      }
+      else {
+	InitValuatorAxisStruct(dev, 0, priv->min_x, priv->max_x,
+			       9500,
+			       0     /* min_res */,
+			       9500  /* max_res */);
+	InitValuatorAxisStruct(dev, 1, priv->min_y, priv->max_y,
+			       10500,
+			       0     /* min_res */,
+			       10500 /* max_res */);
+      }
+
+      if (InitFocusClassDeviceStruct(dev) == FALSE) {
+	ErrorF("Unable to allocate Elographics touchscreen FocusClassDeviceStruct\n");
+      }
+      
+      /*
+       * Allocate the motion events buffer.
+       */
+      xf86MotionHistoryAllocate(local);
+      
+      /*
+       * This once has caused the server to crash after doing an xalloc & strcpy ??
+       */
+#ifndef XFREE86_V4
+      AssignTypeAndName(dev, local->atom, local->name);
+#endif
+      
+      DBG(2, ErrorF("Done.\n"));
+      return Success;
+    }
+    
+  case DEVICE_ON:
+    DBG(2, ErrorF("Elographics touchscreen on...\n"));
+
+    if (local->fd < 0) {
+#ifndef XFREE86_V4
+      struct termios termios_tty;
+      int	     i, result;
+#endif
+      
+      DBG(2, ErrorF("Elographics touchscreen opening : %s\n", priv->input_dev));
+#ifdef XFREE86_V4
+      local->fd = xf86OpenSerial(local->options);
+      if (local->fd < 0) {
+	Error("Unable to open Elographics touchscreen device");
+	return !Success;
+      }
+#else
+      SYSCALL(local->fd = open(priv->input_dev, O_RDWR|O_NDELAY, 0));
+      if (local->fd < 0) {
+	Error("Unable to open Elographics touchscreen device");
+	return !Success;
+      }
+
+      DBG(3, ErrorF("Try to see if the link is at the specified rate\n"));
+      memset(&termios_tty, 0, sizeof(termios_tty));
+      termios_tty.c_cflag = priv->link_speed | CS8 | CREAD | CLOCAL;
+      termios_tty.c_cc[VMIN] = 1;
+      SYSCALL(result = tcsetattr(local->fd, TCSANOW, &termios_tty));
+      if (result < 0) {
+	Error("Unable to configure Elographics touchscreen port");
+	goto not_success;
+      }
+#endif
+      /*
+       * Try to see if the link is at the specified rate and
+       * ask the controller to report various infos.
+       */
+      memset(req, 0, ELO_PACKET_SIZE);
+      req[1] = tolower(ELO_PARAMETER);
+      if (xf86EloSendQuery(req, reply, local->fd) != Success) {
+	priv->is_a_2310 = 1;
+	ErrorF("Not at the specified rate or model 2310, will continue\n");
+      }
+
+      /*
+       * Ask the controller to report various infos.
+       */
+      memset(req, 0, ELO_PACKET_SIZE);
+      req[1] = tolower(ELO_ID);
+      if (xf86EloSendQuery(req, reply, local->fd) == Success) {
+	xf86EloPrintIdent(reply, priv);
+      }
+      else {
+	ErrorF("Unable to ask Elographics touchscreen identification\n");
+	goto not_success;
+      }
+      
+      /*
+       * Set the operating mode: Stream, no scaling, no calibration,
+       * no range checking, no trim, tracking enabled.
+       */
+      memset(req, 0, ELO_PACKET_SIZE);
+      req[1] = ELO_MODE;
+      req[3] = ELO_TOUCH_MODE | ELO_STREAM_MODE | ELO_UNTOUCH_MODE;
+      req[4] = ELO_TRACKING_MODE;
+      if (xf86EloSendControl(req, local->fd) != Success) {
+	ErrorF("Unable to change Elographics touchscreen operating mode\n");
+	goto not_success;
+      }
+
+#ifndef XFREE86_V4
+      /*
+       * Check if the report delay is compatible with the selected
+       * link speed and reset it otherwise.
+       */
+      for (i = 0; i < sizeof(LinkSpeedValues)/sizeof(LinkParameterStruct); i++) {
+	if (LinkSpeedValues[i].speed == priv->link_speed) {
+	  if (LinkSpeedValues[i].delay > priv->report_delay) {
+	    ErrorF("Changing report delay from %d ms to %d ms to comply with link speed\n",
+		   priv->report_delay*10, LinkSpeedValues[i].delay*10);
+	    priv->report_delay = LinkSpeedValues[i].delay;
+	  }
+	}
+      }
+#endif
+      /*
+       * Set the touch reports timings from configuration data.
+       */
+      memset(req, 0, ELO_PACKET_SIZE);
+      req[1] = ELO_REPORT;
+      req[2] = priv->untouch_delay;
+      req[3] = priv->report_delay;
+      if (xf86EloSendControl(req, local->fd) != Success) {
+	ErrorF("Unable to change Elographics touchscreen reports timings\n");
+
+      not_success:
+	SYSCALL(close(local->fd));
+	local->fd = -1;
+	return !Success;
+      }
+#ifdef XFREE86_V4
+      xf86AddEnabledDevice(local);
+#else
+      AddEnabledDevice(local->fd);
+#endif
+      dev->public.on = TRUE;  
+    }
+    
+    DBG(2, ErrorF("Done\n"));
+    return Success;
+    
+    /*
+     * Deactivate the device. After this, the device will not emit
+     * events until a subsequent DEVICE_ON. Thus, we can momentarily
+     * close the port.
+     */
+  case DEVICE_OFF:
+    DBG(2, ErrorF("Elographics touchscreen off...\n"));
+    dev->public.on = FALSE;
+    if (local->fd >= 0) {
+#ifdef XFREE86_V4
+      xf86RemoveEnabledDevice(local);
+#else
+      RemoveEnabledDevice(local->fd);
+#endif
+    }
+    SYSCALL(close(local->fd));
+    local->fd = -1;
+    DBG(2, ErrorF("Done\n"));
+    return Success;
+    
+    /*
+     * Final close before server exit. This is used during server shutdown.
+     * Close the port and free all the resources.
+     */
+  case DEVICE_CLOSE:
+    DBG(2, ErrorF("Elographics touchscreen close...\n"));
+    dev->public.on = FALSE;
+    if (local->fd >= 0) {
+      RemoveEnabledDevice(local->fd);
+    }
+    SYSCALL(close(local->fd));
+    local->fd = -1;
+    DBG(2, ErrorF("Done\n"));
+    return Success;
+
+  default:
+      ErrorF("unsupported mode=%d\n", mode);
+      return !Success;
+  }
+}
+
+/*
+ ***************************************************************************
+ *
+ * xf86EloAllocate --
+ *
+ ***************************************************************************
+ */
+static LocalDevicePtr
+#ifndef XFREE86_V4
+xf86EloAllocate(void)
+#else
+xf86EloAllocate(InputDriverPtr	drv)     
+#endif
+{
+  LocalDevicePtr	local;
+  EloPrivatePtr		priv;
+
+  priv = xalloc(sizeof(EloPrivateRec));
+  if (!priv)
+    return NULL;
+
+#ifndef XFREE86_V4
+  local = (LocalDevicePtr) xalloc(sizeof(LocalDeviceRec));
+#else
+  local = xf86AllocateInput(drv, 0);
+#endif
+
+  if (!local) {
+    xfree(priv);
+    return NULL;
+  }
+  
+#ifdef XFREE86_V4
+  priv->input_dev = strdup(ELO_PORT);
+#else
+  priv->input_dev = ELO_PORT;
+  priv->link_speed = ELO_LINK_SPEED;
+#endif
+  priv->min_x = 0;
+  priv->max_x = 3000;
+  priv->min_y = 0;
+  priv->max_y = 3000;
+  priv->untouch_delay = ELO_UNTOUCH_DELAY;
+  priv->report_delay = ELO_REPORT_DELAY;
+  priv->screen_no = 0;
+  priv->screen_width = -1;
+  priv->screen_height = -1;
+  priv->inited = 0;
+  priv->is_a_2310 = 0;
+  priv->checksum = ELO_INIT_CHECKSUM;
+  priv->packet_buf_p = 0;
+  priv->swap_axes = 0;
+
+  local->name = XI_TOUCHSCREEN;
+  local->flags = 0 /* XI86_NO_OPEN_ON_INIT */;
+#ifndef XFREE86_V4
+#if !defined(sun) || defined(i386)
+  local->device_config = xf86EloConfig;
+#endif
+#endif
+  local->device_control = xf86EloControl;
+  local->read_input   = xf86EloReadInput;
+  local->control_proc = NULL;
+  local->close_proc   = NULL;
+  local->switch_mode  = NULL;
+  local->conversion_proc = xf86EloConvert;
+  local->reverse_conversion_proc = NULL;
+  local->fd	      = -1;
+  local->atom	      = 0;
+  local->dev	      = NULL;
+  local->private      = priv;
+  local->type_name    = "Elographics TouchScreen";
+  local->history_size = 0;
+  
+  return local;
+}
+
+#ifndef XFREE86_V4
+/*
+ ***************************************************************************
+ *
+ * Elographics device association --
+ *
+ ***************************************************************************
+ */
+DeviceAssocRec elographics_assoc =
+{
+  "elographics",                /* config_section_name */
+  xf86EloAllocate               /* device_allocate */
+};
+
+#ifdef DYNAMIC_MODULE
+/*
+ ***************************************************************************
+ *
+ * entry point of dynamic loading
+ *
+ ***************************************************************************
+ */
+int
+#ifndef DLSYM_BUG
+init_module(unsigned long	server_version)
+#else
+init_xf86Elo(unsigned long      server_version)
+#endif
+{
+    xf86AddDeviceAssoc(&elographics_assoc);
+
+    if (server_version != XF86_VERSION_CURRENT) {
+      ErrorF("Warning: Elographics module compiled for version%s\n", XF86_VERSION);
+      return 0;
+    }
+    else {
+      return 1;
+    }
+}
+#endif
+
+#else /* XFREE86_V4 */
+
+static void
+xf86EloUninit(InputDriverPtr	drv,
+	      LocalDevicePtr	local,
+	      int flags)
+{
+  EloPrivatePtr		priv = (EloPrivatePtr) local->private;
+  
+  xf86EloControl(local->dev, DEVICE_OFF);
+
+  xfree(priv->input_dev);
+  xfree(priv);
+  xfree(local->name);
+  xfree(local);
+
+  xf86DeleteInput(local, 0);
+}
+
+static const char *default_options[] = {
+  "BaudRate", "9600",
+  "StopBits", "1",
+  "DataBits", "8",
+  "Parity", "None",
+  "Vmin", "10",
+  "Vtime", "1",
+  "FlowControl", "None",
+  NULL
+};
+
+static InputInfoPtr
+xf86EloInit(InputDriverPtr	drv,
+	    IDevPtr		dev,
+	    int			flags)
+{
+  LocalDevicePtr	local=NULL;
+  EloPrivatePtr		priv=NULL;
+  char			*str;
+  int			portrait = 0;
+  
+  local = xf86EloAllocate(drv);
+  if (!local) {
+    return NULL;
+  }
+  priv = local->private;
+  local->conf_idev = dev;
+  
+  xf86CollectInputOptions(local, default_options, NULL);
+  /* Process the common options. */
+  xf86ProcessCommonOptions(local, local->options);
+
+  str = xf86FindOptionValue(local->options, "Device");
+  if (!str) {
+    xf86Msg(X_ERROR, "%s: No Device specified in Elographics module config.\n",
+	    dev->identifier);
+    if (priv) {
+      if (priv->input_dev) {
+	xfree(priv->input_dev);
+      }
+      xfree(priv);
+    }
+    return local;
+  }
+  priv->input_dev = strdup(str);
+
+  local->name = xf86SetStrOption(local->options, "DeviceName", XI_TOUCHSCREEN);
+  xf86Msg(X_CONFIG, "Elographics X device name: %s\n", local->name);  
+  priv->screen_no = xf86SetIntOption(local->options, "ScreenNo", 0);
+  xf86Msg(X_CONFIG, "Elographics associated screen: %d\n", priv->screen_no);  
+  priv->untouch_delay = xf86SetIntOption(local->options, "UntouchDelay", ELO_UNTOUCH_DELAY);
+  xf86Msg(X_CONFIG, "Elographics untouch delay: %d ms\n", priv->untouch_delay*10);
+  priv->report_delay = xf86SetIntOption(local->options, "ReportDelay", ELO_REPORT_DELAY);
+  xf86Msg(X_CONFIG, "Elographics report delay: %d ms\n", priv->report_delay*10);
+  priv->max_x = xf86SetIntOption(local->options, "MaxX", 3000);
+  xf86Msg(X_CONFIG, "Elographics maximum x position: %d\n", priv->max_x);
+  priv->min_x = xf86SetIntOption(local->options, "MinX", 0);
+  xf86Msg(X_CONFIG, "Elographics minimum x position: %d\n", priv->min_x);
+  priv->max_y = xf86SetIntOption(local->options, "MaxY", 3000);
+  xf86Msg(X_CONFIG, "Elographics maximum y position: %d\n", priv->max_y);
+  priv->min_y = xf86SetIntOption(local->options, "MinY", 0);
+  xf86Msg(X_CONFIG, "Elographics minimum y position: %d\n", priv->min_y);
+  priv->swap_axes = xf86SetBoolOption(local->options, "SwapXY", 0);
+  if (priv->swap_axes) {
+    xf86Msg(X_CONFIG, "Elographics device will work with X and Y axes swapped\n");
+  }
+  debug_level = xf86SetIntOption(local->options, "DebugLevel", 0);
+  if (debug_level) {
+#if DEBUG
+    xf86Msg(X_CONFIG, "Elographics debug level sets to %d\n", debug_level);      
+#else
+    xf86Msg(X_INFO, "Elographics debug not available\n");      
+#endif
+  }
+  str = xf86SetStrOption(local->options, "PortraitMode", "Landscape");
+  if (strcmp(str, "Portrait") == 0) {
+    portrait = 1;
+  }
+  else if (strcmp(str, "PortraitCCW") == 0) {
+    portrait = -1;
+  }
+  else if (strcmp(str, "Landscape") != 0) {
+    xf86Msg(X_ERROR, "Elographics portrait mode should be: Portrait, Landscape or PortraitCCW");
+    str = "Landscape";
+  }
+  xf86Msg(X_CONFIG, "Elographics device will work in %s mode\n", str);      
+  
+  if (priv->max_x - priv->min_x <= 0) {
+    xf86Msg(X_INFO, "Elographics: reverse x mode (minimum x position >= maximum x position)\n");
+  }  
+  if (priv->max_y - priv->min_y <= 0) {
+    xf86Msg(X_INFO, "Elographics: reverse y mode (minimum y position >= maximum y position)\n");
+  }
+
+  if (portrait == 1) {
+    /*
+     * Portrait Clockwise: reverse Y axis and exchange X and Y.
+     */
+    int tmp;
+    tmp = priv->min_y;
+    priv->min_y = priv->max_y;
+    priv->max_y = tmp;
+    priv->swap_axes = (priv->swap_axes==0) ? 1 : 0;
+  }
+  else if (portrait == -1) {
+    /*
+     * Portrait Counter Clockwise: reverse X axis and exchange X and Y.
+     */
+    int tmp;
+    tmp = priv->min_x;
+    priv->min_x = priv->max_x;
+    priv->max_x = tmp;
+    priv->swap_axes = (priv->swap_axes==0) ? 1 : 0;
+  }
+
+  /* mark the device configured */
+  local->flags |= XI86_CONFIGURED;
+  return local;
+}
+
+#ifdef XFree86LOADER
+static
+#endif
+InputDriverRec ELOGRAPHICS = {
+    1,				/* driver version */
+    "elographics",		/* driver name */
+    NULL,			/* identify */
+    xf86EloInit,		/* pre-init */
+    xf86EloUninit,		/* un-init */
+    NULL,			/* module */
+    0				/* ref count */
+};
+
+#ifdef XFree86LOADER
+static pointer
+Plug(pointer	module,
+     pointer	options,
+     int	*errmaj,
+     int	*errmin)
+{
+  xf86AddInputDriver(&ELOGRAPHICS, module, 0);
+
+  return module;
+}
+
+static void
+Unplug(pointer	p)
+{
+  DBG(1, ErrorF("EloUnplug\n"));
+}
+
+static XF86ModuleVersionInfo version_rec = {
+  "elographics",
+  MODULEVENDORSTRING,
+  MODINFOSTRING1,
+  MODINFOSTRING2,
+  XF86_VERSION_CURRENT,
+  1, 0, 0,
+  ABI_CLASS_XINPUT,
+  ABI_XINPUT_VERSION,
+  MOD_CLASS_XINPUT,
+  { 0, 0, 0, 0 }
+};
+
+/*
+ * This is the entry point in the module. The name
+ * is setup after the pattern <module_name>ModuleData.
+ * Do not change it.
+ */
+XF86ModuleData elographicsModuleData = { &version_rec, Plug, Unplug };
+
+#endif
+#endif /* XFREE86_V4 */