From: Mark Assad <massad@gmail.com>
Date: Thu, 5 Oct 2006 02:25:05 +0000 (+1000)
Subject: [PATCH] itmtouch: fix inverted flag to indicate touch location correctly, correct... 
X-Git-Tag: v2.6.19-rc1~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=77dc2db6d1d2703ee4e83d4b3dbecf4e06a910e6;p=linux-2.6

[PATCH] itmtouch: fix inverted flag to indicate touch location correctly, correct white space

There is a bug in the current version of the itmtouch USB touchscreen
driver.  The if statment that checks if pressure is being applied to the
touch screen is now missing a ! (not), so events are no longer being
reported correctly.

The original source code for this line was as follows:

	#define UCP(x) ((unsigned char*)(x))
	#define UCOM(x,y,z) ((UCP((x)->transfer_buffer)[y]) & (z))

	...
	if (!UCOM(urb, 7, 0x20)) {

And was cleaned to:

	unsigned char *data = urb->transfer_buffer;
	....
	 if (data[7] & 0x20) {

(note the lack of '!')

This has been tested on an LG L1510BF and an LG1510SF touch screen.

Signed-off-by: Mark Assad <massad@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/usb/input/itmtouch.c b/drivers/usb/input/itmtouch.c
index 61966d719c..f3e3080de5 100644
--- a/drivers/usb/input/itmtouch.c
+++ b/drivers/usb/input/itmtouch.c
@@ -36,7 +36,11 @@
  *
  * 1.2.1  09/03/2005 (HCE) hc@mivu.no
  *   Code cleanup and adjusting syntax to start matching kernel standards
- *
+ * 
+ * 1.2.2  10/05/2006 (MJA) massad@gmail.com
+ *   Flag for detecting if the screen was being touch was incorrectly 
+ *   inverted, so no touch events were being detected. 	
+ *   
  *****************************************************************************/
 
 #include <linux/kernel.h>
@@ -53,7 +57,7 @@
 #define USB_PRODUCT_ID_TOUCHPANEL	0xf9e9
 
 #define DRIVER_AUTHOR "Hans-Christian Egtvedt <hc@mivu.no>"
-#define DRIVER_VERSION "v1.2.1"
+#define DRIVER_VERSION "v1.2.2"
 #define DRIVER_DESC "USB ITM Inc Touch Panel Driver"
 #define DRIVER_LICENSE "GPL"
 
@@ -108,7 +112,7 @@ static void itmtouch_irq(struct urb *urb, struct pt_regs *regs)
 	input_regs(dev, regs);
 
 	/* if pressure has been released, then don't report X/Y */
-	if (data[7] & 0x20) {
+	if (!(data[7] & 0x20)) {
 		input_report_abs(dev, ABS_X, (data[0] & 0x1F) << 7 | (data[3] & 0x7F));
 		input_report_abs(dev, ABS_Y, (data[1] & 0x1F) << 7 | (data[4] & 0x7F));
 	}