linux-imx

/* ----------------------------------------------------------------------------

 * touchkit_ps2.c  --  Driver for eGalax TouchKit PS/2 Touchscreens

 *

 * Copyright (C) 2005 by Stefan Lucke

 * Copyright (C) 2004 by Daniel Ritz

 * Copyright (C) by Todd E. Johnson (mtouchusb.c)

 *

 * 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.

 *

 * Based upon touchkitusb.c

 *

 * Vendor documentation is available at:

 * http://home.eeti.com.tw/web20/drivers/Software%20Programming%20Guide_v2.0.pdf 

 */

​

#include <linux/kernel.h>

​

#include <linux/input.h>

#include <linux/serio.h>

#include <linux/libps2.h>

​

#include "psmouse.h"

#include "touchkit_ps2.h"

​

#define TOUCHKIT_MAX_XC         0x07ff

#define TOUCHKIT_MAX_YC         0x07ff

​

#define TOUCHKIT_CMD            0x0a

#define TOUCHKIT_CMD_LENGTH     1

​

#define TOUCHKIT_CMD_ACTIVE     'A'

#define TOUCHKIT_CMD_FIRMWARE_VERSION   'D'

#define TOUCHKIT_CMD_CONTROLLER_TYPE    'E'

​

#define TOUCHKIT_SEND_PARMS(s, r, c)    ((s) << 12 | (r) << 8 | (c))

​

#define TOUCHKIT_GET_TOUCHED(packet)    (((packet)[0]) & 0x01)

#define TOUCHKIT_GET_X(packet)      (((packet)[1] << 7) | (packet)[2])

#define TOUCHKIT_GET_Y(packet)      (((packet)[3] << 7) | (packet)[4])

​

static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse)

{

    unsigned char *packet = psmouse->packet;

    struct input_dev *dev = psmouse->dev;

​

    if (psmouse->pktcnt != 5)

        return PSMOUSE_GOOD_DATA;

​

    input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet));

    input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet));

    input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet));