From: Mark Assad <[email protected]>
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 origonal 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.
Patched applied from: linux-2.6.18
(resent because I mangled the whitespace from gmail. Sorry!)
Signed-off-by: Mark Assad <[email protected]>
---
--- linux-2.6.18/drivers/usb/input/itmtouch.c 2006-09-20 13:42:06.000000000 +1000
+++ linux/drivers/usb/input/itmtouch.c 2006-10-05 09:49:56.000000000 +1000
@@ -36,7 +36,11 @@
*
* 1.2.1 09/03/2005 (HCE) [email protected]
* Code cleanup and adjusting syntax to start matching kernel standards
- *
+ *
+ * 1.2.2 10/05/2006 (MJA) [email protected]
+ * 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 <[email protected]>"
-#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
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));
}
-
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