static int ucb1x00_ts_open(struct input_dev *idev)
{
struct ucb1x00_ts *ts = input_get_drvdata(idev);
int ret = 0;
BUG_ON(ts->rtask);
init_waitqueue_head(&ts->irq_wait);
ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts);
if (ret < 0)
goto out;
/*
* If we do this at all, we should allow the user to
* measure and read the X and Y resistance at any time.
*/
ucb1x00_adc_enable(ts->ucb);
ts->x_res = ucb1x00_ts_read_xres(ts);
ts->y_res = ucb1x00_ts_read_yres(ts);
ucb1x00_adc_disable(ts->ucb);
ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd");
if (!IS_ERR(ts->rtask)) {
ret = 0;
} else {
ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
ts->rtask = NULL;
ret = -EFAULT;
}
out:
return ret;
}
/*
* Initialisation.
*/
static int ucb1x00_ts_add(struct ucb1x00_dev *dev)
{
struct ucb1x00_ts *ts;
struct input_dev *idev;
int err;
ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL);
idev = input_allocate_device();
if (!ts || !idev) {
err = -ENOMEM;
goto fail;
}
ts->ucb = dev->ucb;
ts->idev = idev;
ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC;
idev->name = "Touchscreen panel";
idev->id.product = ts->ucb->id;
idev->open = ucb1x00_ts_open;
idev->close = ucb1x00_ts_close;
idev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_drvdata(idev, ts);
ucb1x00_adc_enable(ts->ucb);
ts->x_res = ucb1x00_ts_read_xres(ts);
ts->y_res = ucb1x00_ts_read_yres(ts);
ucb1x00_adc_disable(ts->ucb);
input_set_abs_params(idev, ABS_X, 0, ts->x_res, 0, 0);
input_set_abs_params(idev, ABS_Y, 0, ts->y_res, 0, 0);
input_set_abs_params(idev, ABS_PRESSURE, 0, 0, 0, 0);
err = input_register_device(idev);
if (err)
goto fail;
dev->priv = ts;
return 0;
fail:
input_free_device(idev);
kfree(ts);
return err;
}