input/touchscreen/da9034-ts.c

66 static inline int is_pen_down(struct da9034_touch *touch)
68 	return da903x_query_status(touch->da9034_dev, DA9034_STATUS_PEN_DOWN);
71 static inline int detect_pen_down(struct da9034_touch *touch, int on)
74 		return da903x_set_bits(touch->da9034_dev,
77 		return da903x_clr_bits(touch->da9034_dev,
81 static int read_tsi(struct da9034_touch *touch)
86 	ret = da903x_read(touch->da9034_dev, DA9034_TSI_X_MSB, &_x);
90 	ret = da903x_read(touch->da9034_dev, DA9034_TSI_Y_MSB, &_y);
94 	ret = da903x_read(touch->da9034_dev, DA9034_TSI_XY_LSB, &_v);
98 	touch->last_x = ((_x << 2) & 0x3fc) | (_v & 0x3);
99 	touch->last_y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2);
104 static inline int start_tsi(struct da9034_touch *touch)
106 	return da903x_set_bits(touch->da9034_dev,
110 static inline int stop_tsi(struct da9034_touch *touch)
112 	return da903x_clr_bits(touch->da9034_dev,
116 static inline void report_pen_down(struct da9034_touch *touch)
118 	int x = touch->last_x;
119 	int y = touch->last_y;
122 	if (touch->x_inverted)
125 	if (touch->y_inverted)
128 	input_report_abs(touch->input_dev, ABS_X, x);
129 	input_report_abs(touch->input_dev, ABS_Y, y);
130 	input_report_key(touch->input_dev, BTN_TOUCH, 1);
132 	input_sync(touch->input_dev);
135 static inline void report_pen_up(struct da9034_touch *touch)
137 	input_report_key(touch->input_dev, BTN_TOUCH, 0);
138 	input_sync(touch->input_dev);
141 static void da9034_event_handler(struct da9034_touch *touch, int event)
145 	switch (touch->state) {
153 		err = start_tsi(touch);
157 		touch->state = STATE_BUSY;
164 		err = read_tsi(touch);
171 		err = stop_tsi(touch);
175 		touch->state = STATE_STOP;
183 		da9034_event_handler(touch,
184 				     is_pen_down(touch) ? EVENT_PEN_DOWN :
190 			report_pen_down(touch);
191 			schedule_delayed_work(&touch->tsi_work,
192 				msecs_to_jiffies(touch->interval_ms));
193 			touch->state = STATE_WAIT;
197 			report_pen_up(touch);
198 			touch->state = STATE_IDLE;
206 		if (is_pen_down(touch)) {
207 			start_tsi(touch);
208 			touch->state = STATE_BUSY;
210 			report_pen_up(touch);
211 			touch->state = STATE_IDLE;
218 	touch->state = STATE_IDLE;
219 	stop_tsi(touch);
220 	detect_pen_down(touch, 1);
225 	struct da9034_touch *touch =
228 	da9034_event_handler(touch, EVENT_TIMEDOUT);
234 	struct da9034_touch *touch =
238 		da9034_event_handler(touch, EVENT_TSI_READY);
240 	if ((event & DA9034_EVENT_PEN_DOWN) && touch->state == STATE_IDLE)
241 		da9034_event_handler(touch, EVENT_PEN_DOWN);
248 	struct da9034_touch *touch = input_get_drvdata(dev);
251 	ret = da903x_register_notifier(touch->da9034_dev, &touch->notifier,
257 	ret = da903x_set_bits(touch->da9034_dev,
263 	ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL1, 0x1b);
267 	ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL2, 0x00);
271 	touch->state = STATE_IDLE;
272 	detect_pen_down(touch, 1);
279 	struct da9034_touch *touch = input_get_drvdata(dev);
281 	da903x_unregister_notifier(touch->da9034_dev, &touch->notifier,
284 	cancel_delayed_work_sync(&touch->tsi_work);
286 	touch->state = STATE_IDLE;
287 	stop_tsi(touch);
288 	detect_pen_down(touch, 0);
291 	da903x_clr_bits(touch->da9034_dev,
299 	struct da9034_touch *touch;
303 	touch = devm_kzalloc(&pdev->dev, sizeof(struct da9034_touch),
305 	if (!touch) {
310 	touch->da9034_dev = pdev->dev.parent;
313 		touch->interval_ms	= pdata->interval_ms;
314 		touch->x_inverted	= pdata->x_inverted;
315 		touch->y_inverted	= pdata->y_inverted;
318 		touch->interval_ms	= 10;
321 	INIT_DELAYED_WORK(&touch->tsi_work, da9034_tsi_work);
322 	touch->notifier.notifier_call = da9034_touch_notifier;
344 	touch->input_dev = input_dev;
345 	input_set_drvdata(input_dev, touch);
356 		.name	= "da9034-touch",
365 MODULE_ALIAS("platform:da9034-touch");