Input: usbtouchscreen - add support for ET&T TC4UM touchscreen controller

This patch adds support for the ET&T TC4UM 4-wire USB touchscreen
controller and tries to reuse the bits for TC5UH controller in kernel
already. Data interface is same.

Tested-by: Roger Pueyo Centelles <rogerpueyo@rogerpueyo.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 14 insertions, 11 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 3b9d5e2105d7..e835f04bc0d0 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -540,9 +540,9 @@ config TOUCHSCREEN_USB_ZYTRONIC
         bool "Zytronic controller" if EMBEDDED
         depends on TOUCHSCREEN_USB_COMPOSITE
 
-config TOUCHSCREEN_USB_ETT_TC5UH
+config TOUCHSCREEN_USB_ETT_TC45USB
         default y
-        bool "ET&T TC5UH touchscreen controler support" if EMBEDDED
+        bool "ET&T USB series TC4UM/TC5UH touchscreen controler support" if EMBEDDED
         depends on TOUCHSCREEN_USB_COMPOSITE
 
 config TOUCHSCREEN_USB_NEXIO
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 5d6bf2a4bbad..b9cee2738adb 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -135,7 +135,7 @@ enum {
         DEVTYPE_JASTEC,
         DEVTYPE_E2I,
         DEVTYPE_ZYTRONIC,
-        DEVTYPE_TC5UH,
+        DEVTYPE_TC45USB,
         DEVTYPE_NEXIO,
 };
 
@@ -222,8 +222,11 @@ static const struct usb_device_id usbtouch_devices[] = {
         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 #endif
 
-#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
-        {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH},
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
+        /* TC5UH */
+        {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
+        /* TC4UM */
+        {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 #endif
 
 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
@@ -574,10 +577,10 @@ static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 #endif
 
 /*****************************************************************************
- * ET&T TC5UH part
+ * ET&T TC5UH/TC4UM part
  */
-#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
-static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
+static int tc45usb_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];
@@ -1106,14 +1109,14 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
         },
 #endif
 
-#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
-        [DEVTYPE_TC5UH] = {
+#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
+        [DEVTYPE_TC45USB] = {
                 .min_xc         = 0x0,
                 .max_xc         = 0x0fff,
                 .min_yc         = 0x0,
                 .max_yc         = 0x0fff,
                 .rept_size      = 5,
-                .read_data      = tc5uh_read_data,
+                .read_data      = tc45usb_read_data,
         },
 #endif