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 ?
+ data->client = client;
+ data->input_dev = input_dev;
+ /* controller may be in sleep, wake it up. */
+ egalax_wake_up_device(client);
+ ret = egalax_firmware_version(client);
+ if (ret< 0) {
+ dev_err(&client->dev,
+ "egalax_ts: failed to read firmware version\n");
+ ret = -EIO;
+ goto err_free_dev;
+ }
+
+ input_dev->name = "EETI eGalax Touch Screen";
+ input_dev->phys = "I2C",
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->dev.parent =&client->dev;
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+ __set_bit(ABS_X, input_dev->absbit);
+ __set_bit(ABS_Y, input_dev->absbit);
+ input_set_abs_params(input_dev, ABS_X, 0, 32767, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, 32767, 0, 0);
make 32767 to macro here ?
--
Thanks
Best Regards
Wanlong Gao
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