1 files changed, 100 insertions, 4 deletions

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 68ece5801a58..09a5e7341bd5 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -14,6 +14,7 @@
  *  - General Touch
  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  *  - JASTEC USB touch controller/DigiTech DTR-02U
+ *  - Zytronic capacitive touchscreen
  *
  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
@@ -73,6 +74,15 @@ struct usbtouch_device_info {
         int min_press, max_press;
         int rept_size;
 
+        /*
+         * Always service the USB devices irq not just when the input device is
+         * open. This is useful when devices have a watchdog which prevents us
+         * from periodically polling the device. Leave this unset unless your
+         * touchscreen device requires it, as it does consume more of the USB
+         * bandwidth.
+         */
+        bool irq_always;
+
         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
 
         /*
@@ -121,6 +131,8 @@ enum {
         DEVTYPE_GOTOP,
         DEVTYPE_JASTEC,
         DEVTYPE_E2I,
+        DEVTYPE_ZYTRONIC,
+        DEVTYPE_TC5UH,
 };
 
 #define USB_DEVICE_HID_CLASS(vend, prod) \
@@ -201,6 +213,15 @@ static struct usb_device_id usbtouch_devices[] = {
 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 #endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
+        {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
+        {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH},
+#endif
+
         {}
 };
 
@@ -538,6 +559,19 @@ static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 }
 #endif
 
+/*****************************************************************************
+ * ET&T TC5UH part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
+static int tc5uh_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
 
 /*****************************************************************************
  * IdealTEK URTC1000 Part
@@ -621,6 +655,39 @@ static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 }
 #endif
 
+/*****************************************************************************
+ * Zytronic Part
+ */
+#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
+static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+{
+        switch (pkt[0]) {
+        case 0x3A: /* command response */
+                dbg("%s: Command response %d", __func__, pkt[1]);
+                break;
+
+        case 0xC0: /* down */
+                dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
+                dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
+                dev->touch = 1;
+                dbg("%s: down %d,%d", __func__, dev->x, dev->y);
+                return 1;
+
+        case 0x80: /* up */
+                dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
+                dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
+                dev->touch = 0;
+                dbg("%s: up %d,%d", __func__, dev->x, dev->y);
+                return 1;
+
+        default:
+                dbg("%s: Unknown return %d", __func__, pkt[0]);
+                break;
+        }
+
+        return 0;
+}
+#endif
 
 /*****************************************************************************
  * the different device descriptors
@@ -783,6 +850,29 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
                 .read_data      = e2i_read_data,
         },
 #endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
+        [DEVTYPE_ZYTRONIC] = {
+                .min_xc         = 0x0,
+                .max_xc         = 0x03ff,
+                .min_yc         = 0x0,
+                .max_yc         = 0x03ff,
+                .rept_size      = 5,
+                .read_data      = zytronic_read_data,
+                .irq_always     = true,
+        },
+#endif
+
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
+        [DEVTYPE_TC5UH] = {
+                .min_xc         = 0x0,
+                .max_xc         = 0x0fff,
+                .min_yc         = 0x0,
+                .max_yc         = 0x0fff,
+                .rept_size      = 5,
+                .read_data      = tc5uh_read_data,
+        },
+#endif
 };
 
 
@@ -933,8 +1023,10 @@ static int usbtouch_open(struct input_dev *input)
 
         usbtouch->irq->dev = usbtouch->udev;
 
-        if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
-                return -EIO;
+        if (!usbtouch->type->irq_always) {
+                if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
+                  return -EIO;
+        }
 
         return 0;
 }
@@ -943,7 +1035,8 @@ static void usbtouch_close(struct input_dev *input)
 {
         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 
-        usb_kill_urb(usbtouch->irq);
+        if (!usbtouch->type->irq_always)
+                usb_kill_urb(usbtouch->irq);
 }
 
 
@@ -1066,6 +1159,9 @@ static int usbtouch_probe(struct usb_interface *intf,
 
         usb_set_intfdata(intf, usbtouch);
 
+        if (usbtouch->type->irq_always)
+                usb_submit_urb(usbtouch->irq, GFP_KERNEL);
+
         return 0;
 
 out_free_buffers:
@@ -1087,7 +1183,7 @@ static void usbtouch_disconnect(struct usb_interface *intf)
 
         dbg("%s - usbtouch is initialized, cleaning up", __func__);
         usb_set_intfdata(intf, NULL);
-        usb_kill_urb(usbtouch->irq);
+        /* this will stop IO via close */
         input_unregister_device(usbtouch->input);
         usb_free_urb(usbtouch->irq);
         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);