touchserial.c

Linux下触摸屏的驱动程序

/* $XConsortium: xf86Elo.c /main/13 1996/10/25 14:11:31 kaleb $ */
/*
 * Copyright 1995, 1999 by Patrick Lecoanet, France. <[e-mail]>
 *                                                                            
 * 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 1.7 1999/12/13 23:38:13 robin 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 ([e-mail]) and
 *   1998/03/25 [e-mail]
 *  
 *   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"
#include "xf86Version.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
#undef strdup
#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)
#define strdup(str) xf86strdup(str)
#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;