On 07/29/2011 01:28 PM, Jiejing.Zhang wrote:
Hi Gao,
2011/7/26 Wanlong Gao<gaowanlong@xxxxxxxxxxxxxx>
On 07/26/2011 05:25 PM, Zhang Jiejing wrote:
this patch adds EETI eGalax serial multi touch controller driver.
EETI eGalax serial touch screen controller is a I2C based multiple
capacitive touch screen controller, it can supports 5 touch events maximum.
Signed-off-by: Zhang Jiejing<jiejing.zhang@xxxxxxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 10 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/egalax_ts.c | 314 +++++++++++++++++++++++++++++++++
3 files changed, 325 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/egalax_ts.c
+
+ if (down) {
+ /* since egalax only report one of multi touch event,
+ * so we need record pervious event with different id
+ * and report them.*/
+ events[id].valid = valid;
+ events[id].status = down;
+ events[id].x = x;
+ events[id].y = y;
+
+ for (i = 0; i< MAX_SUPPORT_POINTS; i++) {
+ if (!events[i].valid)
+ continue;
+ dev_dbg(&client->dev, "report id:%d valid:%d x:%d y:%d",
+ i, valid, x, y);
+
+ input_report_abs(input_dev,
+ ABS_MT_TRACKING_ID, i);
+ input_report_abs(input_dev,
+ ABS_MT_TOUCH_MAJOR, 1);
+ input_report_abs(input_dev,
+ ABS_MT_POSITION_X, events[i].x);
+ input_report_abs(input_dev,
+ ABS_MT_POSITION_Y, events[i].y);
+ input_mt_sync(input_dev);
+ }
+ } else {
+ dev_dbg(&client->dev, "release id:%d\n", id);
+ events[id].valid = 0;
+ events[id].status = 0;
+ input_report_abs(input_dev, ABS_MT_TRACKING_ID, id);
+ input_event(input_dev, EV_ABS, ABS_MT_TOUCH_MAJOR, 0);
+ input_mt_sync(input_dev);
+ }
+
+ input_sync(input_dev);
need re-sync here ?
it's not re-sync, input_mt_sync() is different from input_sync(), the
mt_sync is used to notify a multi touch event is finish. but a
input_sync() means a input event is finished.
eg,
one input event may have many multi touch event.
[MT 1, x, y]
[mt sync]
[MT 2, x, y]
[mt sync]
[input sync]
[MT 1, x, y]
[mt sync]
[MT 2, x, y]
[mt sync]
[input sync]
...
case SYN_MT_REPORT:
dev->sync = false;
Yeah, I see, thanks a lot.
BR,
Jiejing
--
Thanks
Best Regards
Wanlong Gao
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