usbtouchscreen.c

for linux touch screen source code

/******************************************************************************
 * usbtouchscreen.c
 * Driver for USB Touchscreens, supporting those devices:
 *  - eGalax Touchkit
 *    includes eTurboTouch CT-410/510/700
 *  - 3M/Microtouch  EX II series
 *  - ITM
 *  - PanJit TouchSet
 *  - eTurboTouch
 *  - Gunze AHL61
 *  - DMC TSC-10/25
 *  - IRTOUCHSYSTEMS/UNITOP
 *  - IdealTEK URTC1000
 *  - General Touch
 *  - GoTop Super_Q2/GogoPen/PenPower tablets
 *
 * Copyright (C) 2004-2007 by Daniel Ritz <[e-mail]>
 * Copyright (C) by Todd E. Johnson (usbtouchusb.c)
 *
 *
 *
 *  hsu, usbtch.c
 *      modified from:
 *          \\Fedora7\public\usr\src\redhat\BUILD\kernel-2.6.21\linux-2.6.21.i686\drivers\usb\input\mtouchusb.c
 *
 *
 *          fedora7 and touch firmware co-work, not work fine, because  last touch up event lost.   can't do utchcalib
 *
 *   v100   solution:  add usbtouch_usb_t,  add init_timer
 *                  in usbtouchusb_irq: add start_timer when every touch clicked,
 *                   when time out, force touch up to fix previout lost touch up
 *
 *
 *
 *
 * This program 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 of the
 * License, or (at your option) any later version.
 *
 * This program 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.
 *
 * Driver is based on touchkitusb.c
 * - ITM parts are from itusbtouch.c
 * - 3M parts are from usbtouchusb.c
 * - PanJit parts are from an unmerged driver by Lanslott Gish
 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
 *   driver from Marius Vollmer
 *
 *****************************************************************************/

//#define DEBUG

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/usb/input.h>


#include <linux/kref.h>
#include <linux/mutex.h>

#include "common.h"
#include <linux/usbdevice_fs.h>

#include <asm/uaccess.h>
#include <asm/byteorder.h>
//#include <linux/moduleparam.h>
//#include <asm/io.h>
#include <linux/smp_lock.h>

#define LONG long

int my_major ;

#define usbtch_MINOR_BASE	193
static struct usbtouch_usb *p_scr_table[SCR_MAX_MNR] = { NULL, /* ... */};


//static int usbtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt);
//static int usbtouch_init(struct usbtouch_usb *usbtouch);

static struct usb_class_driver usbtch_class;
static DECLARE_MUTEX (disconnect_sem);


#define DRIVER_VERSION		"v0.6"
#define DRIVER_AUTHOR		"Daniel Ritz <[e-mail]>"
#define DRIVER_DESC		"USB Touchscreen Driver"

static int swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");

/* device specifc data/functions */
struct usbtouch_usb;
struct usbtouch_device_info {
	int min_xc, max_xc;
	int min_yc, max_yc;
	int min_press, max_press;
	int rept_size;

	void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);

	/*
	 * used to get the packet len. possible return values:
	 * > 0: packet len
	 * = 0: skip one byte
	 * < 0: -return value more bytes needed
	 */
	int  (*get_pkt_len) (unsigned char *pkt, int len);

	int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
	int  (*init)        (struct usbtouch_usb *usbtouch);
};

/* a usbtouch device */
struct usbtouch_usb {
	unsigned char *data;
	dma_addr_t data_dma;
	unsigned char *buffer;
	int buf_len;
	struct urb *irq;
	struct usb_device *udev;
	struct input_dev *input;
	struct usbtouch_device_info *type;
	char name[128];
	char phys[64];

	int x, y;
	int touch, press;


//hsu, add
    int sopen;  //for skel_open
 	unsigned char		minor;			/* the starting minor number for this device */
	int			present;		/* if the device is not disconnected */
	struct semaphore	sem;			/* locks this structure */

    char dataSave[5];

//	wait_queue_head_t rd_wait_q; /* read timeouts */

	struct semaphore	limit_sem;		/* limiting the number of writes in progress */

	struct usb_interface    *interface;		/* the interface for this device */
	struct kref		kref;
	struct mutex		io_mutex;		/* synchronize I/O with disconnect */


	struct timer_list        timer;
	uint32_t        timer_active;

};


/* device types */
enum {
	DEVTPYE_DUMMY = -1,
	DEVTYPE_EGALAX,
	DEVTYPE_PANJIT,
	DEVTYPE_3M,
	DEVTYPE_ITM,
	DEVTYPE_ETURBO,
	DEVTYPE_GUNZE,
	DEVTYPE_DMC_TSC10,
	DEVTYPE_IRTOUCH,
	DEVTYPE_IDEALTEK,
	DEVTYPE_GENERAL_TOUCH,
	DEVTYPE_GOTOP,
};

static struct usb_device_id usbtouch_devices[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
	{USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
	{USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
	{USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
	{USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
	{USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
	{USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
	{USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
	{USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
	{USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
	{USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
	{USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_3M
//	{USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},    //org,
	{USB_DEVICE(0x0d3a, 0xa100), .driver_info = DEVTYPE_3M},    //posiflex usbtch
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_ITM
	{USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
	{USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
	{USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
	{USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
	{USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
	{USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
	{USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
	{USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
#endif

#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
	{USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
	{USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
	{USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
#endif

	{}
};


/*****************************************************************************
 * eGalax part
 */

#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX

#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif

#define EGALAX_PKT_TYPE_MASK		0xFE
#define EGALAX_PKT_TYPE_REPT		0x80
#define EGALAX_PKT_TYPE_DIAG		0x0A

static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
		return 0;

	dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
	dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
	dev->touch = pkt[0] & 0x01;

	return 1;
}

static int egalax_get_pkt_len(unsigned char *buf, int len)
{
	switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
	case EGALAX_PKT_TYPE_REPT:
		return 5;

	case EGALAX_PKT_TYPE_DIAG:
		if (len < 2)
			return -1;

		return buf[1] + 2;
	}

	return 0;
}
#endif


/*****************************************************************************
 * PanJit Part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
	dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
	dev->touch = pkt[0] & 0x01;

	return 1;
}
#endif


///*****************************************************************************
// * 3M/Microtouch Part
// */
//#ifdef CONFIG_TOUCHSCREEN_USB_3M

/*****************************************************************************
 * 3M/Microtouch Part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_3M

#define MTOUCHUSB_ASYNC_REPORT          1
#define MTOUCHUSB_RESET                 7
#define MTOUCHUSB_REQ_CTRLLR_ID         10

static int usbtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
//	dev->x = (pkt[8] << 8) | pkt[7];
//	dev->y = (pkt[10] << 8) | pkt[9];
//	dev->touch = (pkt[2] & 0x40) ? 1 : 0;

	dev->x = ((pkt[4] & 0x0F) << 8) | (pkt[3] & 0xFF);
	dev->y = ((pkt[2] & 0x0F) << 8) | (pkt[1] & 0xFF);
	dev->touch = pkt[0] & 0x01;


	return 1;
}

static int mtouch_init(struct usbtouch_usb *usbtouch)
{
	int ret, i;


	if(1)pr_info("%s - called", __FUNCTION__);


//	ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
//	                      MTOUCHUSB_RESET,
//	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
//	                      1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
//	pr_info("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
//	    __FUNCTION__, ret);
//	if (ret < 0)
//		return ret;
//	msleep(150);
//
//	for (i = 0; i < 3; i++) {
//		ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
//				      MTOUCHUSB_ASYNC_REPORT,
//				      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
//				      1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
//		pr_info("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
//		    __FUNCTION__, ret);
//		if (ret >= 0)
//			break;
//		if (ret != -EPIPE)
//			return ret;
//	}


	return 0;
}
#endif



/*****************************************************************************
 * ITM Part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	int touch;
	/*
	 * ITM devices report invalid x/y data if not touched.
	 * if the screen was touched before but is not touched any more
	 * report touch as 0 with the last valid x/y data once. then stop
	 * reporting data until touched again.
	 */
	dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);

	touch = ~pkt[7] & 0x20;
	if (!touch) {
		if (dev->touch) {
			dev->touch = 0;
			return 1;
		}

		return 0;
	}

	dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
	dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
	dev->touch = touch;

	return 1;
}
#endif


/*****************************************************************************
 * eTurboTouch part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	unsigned int shift;

	/* packets should start with sync */
	if (!(pkt[0] & 0x80))
		return 0;

	shift = (6 - (pkt[0] & 0x03));
	dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
	dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
	dev->touch = (pkt[0] & 0x10) ? 1 : 0;

	return 1;
}

static int eturbo_get_pkt_len(unsigned char *buf, int len)
{
	if (buf[0] & 0x80)
		return 5;
	if (buf[0] == 0x01)
		return 3;
	return 0;
}
#endif


/*****************************************************************************
 * Gunze part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
		return 0;

	dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
	dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
	dev->touch = pkt[0] & 0x20;

	return 1;
}
#endif

/*****************************************************************************
 * DMC TSC-10/25 Part
 *
 * Documentation about the controller and it's protocol can be found at
 *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 */
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10

/* supported data rates. currently using 130 */
#define TSC10_RATE_POINT	0x50
#define TSC10_RATE_30		0x40
#define TSC10_RATE_50		0x41
#define TSC10_RATE_80		0x42
#define TSC10_RATE_100		0x43
#define TSC10_RATE_130		0x44
#define TSC10_RATE_150		0x45

/* commands */
#define TSC10_CMD_RESET		0x55
#define TSC10_CMD_RATE		0x05
#define TSC10_CMD_DATA1		0x01

static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
{
	struct usb_device *dev = usbtouch->udev;
	int ret;
	unsigned char buf[2];

	/* reset */
	buf[0] = buf[1] = 0xFF;
	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
	                      TSC10_CMD_RESET,
	                      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
	                      0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
	if (ret < 0)
		return ret;
	if (buf[0] != 0x06 || buf[1] != 0x00)
		return -ENODEV;

	/* set coordinate output rate */
	buf[0] = buf[1] = 0xFF;
	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
	                      TSC10_CMD_RATE,
	                      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
	                      TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
	if (ret < 0)
		return ret;
	if ((buf[0] != 0x06 || buf[1] != 0x00) &&
	    (buf[0] != 0x15 || buf[1] != 0x01))
		return -ENODEV;

	/* start sending data */
	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
	                      TSC10_CMD_DATA1,
	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
	                      0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
	if (ret < 0)
		return ret;

	return 0;
}


static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
	dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
	dev->touch = pkt[0] & 0x01;

	return 1;
}
#endif


/*****************************************************************************
 * IRTOUCH Part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	dev->x = (pkt[3] << 8) | pkt[2];
	dev->y = (pkt[5] << 8) | pkt[4];
	dev->touch = (pkt[1] & 0x03) ? 1 : 0;

	return 1;
}
#endif


/*****************************************************************************
 * IdealTEK URTC1000 Part
 */
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
static int idealtek_get_pkt_len(unsigned char *buf, int len)
{
	if (buf[0] & 0x80)
		return 5;
	if (buf[0] == 0x01)
		return len;
	return 0;
}

static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
	switch (pkt[0] & 0x98) {
	case 0x88: