Input: usbtouchscreen - support bigger iNexio touchscreens

Bigger Nexio touchscreens not only send more data but also the header
values are modified somewhat.  Fix the header (it's a guesswork but
it works at least on one 46" touchscreen with 2.00SMS firmware) and
also increase rept_size.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 0b0ae2e17a6..82227b00d4b 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -857,6 +857,11 @@ static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
         if ((pkt[0] & 0xe0) != 0xe0)
                 return 0;
 
+        if (be16_to_cpu(packet->data_len) > 0xff)
+                packet->data_len = cpu_to_be16(be16_to_cpu(packet->data_len) - 0x100);
+        if (be16_to_cpu(packet->x_len) > 0xff)
+                packet->x_len = cpu_to_be16(be16_to_cpu(packet->x_len) - 0x80);
+
         /* send ACK */
         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 
@@ -1112,7 +1117,7 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
 
 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
         [DEVTYPE_NEXIO] = {
-                .rept_size      = 128,
+                .rept_size      = 1024,
                 .irq_always     = true,
                 .read_data      = nexio_read_data,
                 .init           = nexio_init,