[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 61966d7..f3e3080 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 @@
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));
}
