Input: usbtouchscreen - add support for Data Modul EasyTouch TP 72037

The Data Modul TP 72037 EasyTouch controller is derived from EGALAX
controller and is capable of detecting dual contacts. Packets can be 5
bytes or 10 bytes long, depending whether one or two contacts are
detected. Format is same as EGALAX touch controller, but with x and y
coordinates inverted.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 5df719b..fc087b3 100644 (file)
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -619,6 +619,7 @@ config TOUCHSCREEN_USB_COMPOSITE
          - JASTEC USB Touch Controller/DigiTech DTR-02U
          - Zytronic controllers
          - Elo TouchSystems 2700 IntelliTouch
+         - EasyTouch USB Touch Controller from Data Modul
 
          Have a look at <http://linux.chapter7.ch/touchkit/> for
          a usage description and the required user-space stuff.
@@ -723,6 +724,14 @@ config TOUCHSCREEN_USB_NEXIO
        bool "NEXIO/iNexio device support" if EXPERT
        depends on TOUCHSCREEN_USB_COMPOSITE
 
+config TOUCHSCREEN_USB_EASYTOUCH
+       default y
+       bool "EasyTouch USB Touch controller device support" if EMBEDDED
+       depends on TOUCHSCREEN_USB_COMPOSITE
+       help
+         Say Y here if you have a EasyTouch USB Touch controller device support.
+         If unsure, say N.
+
 config TOUCHSCREEN_TOUCHIT213
        tristate "Sahara TouchIT-213 touchscreen"
        select SERIO

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 9dbd8b4..36fa292 100644 (file)
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -17,6 +17,7 @@
  *  - Zytronic capacitive touchscreen
  *  - NEXIO/iNexio
  *  - Elo TouchSystems 2700 IntelliTouch
+ *  - EasyTouch USB Dual/Multi touch controller from Data Modul
  *
  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
@@ -140,6 +141,7 @@ enum {
        DEVTYPE_TC45USB,
        DEVTYPE_NEXIO,
        DEVTYPE_ELO,
+       DEVTYPE_ETOUCH,
 };
 
 #define USB_DEVICE_HID_CLASS(vend, prod) \
@@ -245,6 +247,10 @@ static const struct usb_device_id usbtouch_devices[] = {
        {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 #endif
 
+#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
+       {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
+#endif
+
        {}
 };
 
@@ -326,6 +332,51 @@ static int egalax_get_pkt_len(unsigned char *buf, int len)
 }
 #endif
 
+/*****************************************************************************
+ * EasyTouch part
+ */
+
+#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
+
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
+
+#define ETOUCH_PKT_TYPE_MASK           0xFE
+#define ETOUCH_PKT_TYPE_REPT           0x80
+#define ETOUCH_PKT_TYPE_REPT2          0xB0
+#define ETOUCH_PKT_TYPE_DIAG           0x0A
+
+static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+       if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
+               (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
+               return 0;
+
+       dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
+       dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
+       dev->touch = pkt[0] & 0x01;
+
+       return 1;
+}
+
+static int etouch_get_pkt_len(unsigned char *buf, int len)
+{
+       switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
+       case ETOUCH_PKT_TYPE_REPT:
+       case ETOUCH_PKT_TYPE_REPT2:
+               return 5;
+
+       case ETOUCH_PKT_TYPE_DIAG:
+               if (len < 2)
+                       return -1;
+
+               return buf[1] + 2;
+       }
+
+       return 0;
+}
+#endif
 
 /*****************************************************************************
  * PanJit Part
@@ -1175,6 +1226,18 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
                .exit           = nexio_exit,
        },
 #endif
+#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
+       [DEVTYPE_ETOUCH] = {
+               .min_xc         = 0x0,
+               .max_xc         = 0x07ff,
+               .min_yc         = 0x0,
+               .max_yc         = 0x07ff,
+               .rept_size      = 16,
+               .process_pkt    = usbtouch_process_multi,
+               .get_pkt_len    = etouch_get_pkt_len,
+               .read_data      = etouch_read_data,
+       },
+#endif
 };