122 static void tsc200x_update_pen_state(struct tsc200x *ts,  in tsc200x_update_pen_state()  argument
126 		input_report_abs(ts->idev, ABS_X, x);  in tsc200x_update_pen_state()
127 		input_report_abs(ts->idev, ABS_Y, y);  in tsc200x_update_pen_state()
128 		input_report_abs(ts->idev, ABS_PRESSURE, pressure);  in tsc200x_update_pen_state()
129 		if (!ts->pen_down) {  in tsc200x_update_pen_state()
130 			input_report_key(ts->idev, BTN_TOUCH, !!pressure);  in tsc200x_update_pen_state()
131 			ts->pen_down = true;  in tsc200x_update_pen_state()
134 		input_report_abs(ts->idev, ABS_PRESSURE, 0);  in tsc200x_update_pen_state()
135 		if (ts->pen_down) {  in tsc200x_update_pen_state()
136 			input_report_key(ts->idev, BTN_TOUCH, 0);  in tsc200x_update_pen_state()
137 			ts->pen_down = false;  in tsc200x_update_pen_state()
140 	input_sync(ts->idev);  in tsc200x_update_pen_state()
141 	dev_dbg(ts->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,  in tsc200x_update_pen_state()
147 	struct tsc200x *ts = _ts;  in tsc200x_irq_thread()  local
154 	error = regmap_bulk_read(ts->regmap, TSC200X_REG_X, &tsdata,  in tsc200x_irq_thread()
173 	if (!ts->pen_down &&  in tsc200x_irq_thread()
174 	    ts->in_x == tsdata.x && ts->in_y == tsdata.y &&  in tsc200x_irq_thread()
175 	    ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {  in tsc200x_irq_thread()
183 	ts->in_x = tsdata.x;  in tsc200x_irq_thread()
184 	ts->in_y = tsdata.y;  in tsc200x_irq_thread()
185 	ts->in_z1 = tsdata.z1;  in tsc200x_irq_thread()
186 	ts->in_z2 = tsdata.z2;  in tsc200x_irq_thread()
190 	pressure = pressure * ts->x_plate_ohm / 4096;  in tsc200x_irq_thread()
194 	spin_lock_irqsave(&ts->lock, flags);  in tsc200x_irq_thread()
196 	tsc200x_update_pen_state(ts, tsdata.x, tsdata.y, pressure);  in tsc200x_irq_thread()
197 	mod_timer(&ts->penup_timer,  in tsc200x_irq_thread()
200 	spin_unlock_irqrestore(&ts->lock, flags);  in tsc200x_irq_thread()
202 	ts->last_valid_interrupt = jiffies;  in tsc200x_irq_thread()
209 	struct tsc200x *ts = (struct tsc200x *)data;  in tsc200x_penup_timer()  local
212 	spin_lock_irqsave(&ts->lock, flags);  in tsc200x_penup_timer()
213 	tsc200x_update_pen_state(ts, 0, 0, 0);  in tsc200x_penup_timer()
214 	spin_unlock_irqrestore(&ts->lock, flags);  in tsc200x_penup_timer()
217 static void tsc200x_start_scan(struct tsc200x *ts)  in tsc200x_start_scan()  argument
219 	regmap_write(ts->regmap, TSC200X_REG_CFR0, TSC200X_CFR0_INITVALUE);  in tsc200x_start_scan()
220 	regmap_write(ts->regmap, TSC200X_REG_CFR1, TSC200X_CFR1_INITVALUE);  in tsc200x_start_scan()
221 	regmap_write(ts->regmap, TSC200X_REG_CFR2, TSC200X_CFR2_INITVALUE);  in tsc200x_start_scan()
222 	ts->tsc200x_cmd(ts->dev, TSC200X_CMD_NORMAL);  in tsc200x_start_scan()
225 static void tsc200x_stop_scan(struct tsc200x *ts)  in tsc200x_stop_scan()  argument
227 	ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP);  in tsc200x_stop_scan()
230 static void tsc200x_set_reset(struct tsc200x *ts, bool enable)  in tsc200x_set_reset()  argument
232 	if (ts->reset_gpio)  in tsc200x_set_reset()
233 		gpiod_set_value_cansleep(ts->reset_gpio, enable);  in tsc200x_set_reset()
234 	else if (ts->set_reset)  in tsc200x_set_reset()
235 		ts->set_reset(enable);  in tsc200x_set_reset()
239 static void __tsc200x_disable(struct tsc200x *ts)  in __tsc200x_disable()  argument
241 	tsc200x_stop_scan(ts);  in __tsc200x_disable()
243 	disable_irq(ts->irq);  in __tsc200x_disable()
244 	del_timer_sync(&ts->penup_timer);  in __tsc200x_disable()
246 	cancel_delayed_work_sync(&ts->esd_work);  in __tsc200x_disable()
248 	enable_irq(ts->irq);  in __tsc200x_disable()
252 static void __tsc200x_enable(struct tsc200x *ts)  in __tsc200x_enable()  argument
254 	tsc200x_start_scan(ts);  in __tsc200x_enable()
256 	if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {  in __tsc200x_enable()
257 		ts->last_valid_interrupt = jiffies;  in __tsc200x_enable()
258 		schedule_delayed_work(&ts->esd_work,  in __tsc200x_enable()
260 					msecs_to_jiffies(ts->esd_timeout)));  in __tsc200x_enable()
268 	struct tsc200x *ts = dev_get_drvdata(dev);  in tsc200x_selftest_show()  local
275 	mutex_lock(&ts->mutex);  in tsc200x_selftest_show()
280 	__tsc200x_disable(ts);  in tsc200x_selftest_show()
282 	error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high_orig);  in tsc200x_selftest_show()
291 	error = regmap_write(ts->regmap, TSC200X_REG_TEMP_HIGH, temp_high_test);  in tsc200x_selftest_show()
298 	error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);  in tsc200x_selftest_show()
313 	tsc200x_set_reset(ts, false);  in tsc200x_selftest_show()
315 	tsc200x_set_reset(ts, true);  in tsc200x_selftest_show()
321 	error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);  in tsc200x_selftest_show()
336 	__tsc200x_enable(ts);  in tsc200x_selftest_show()
337 	mutex_unlock(&ts->mutex);  in tsc200x_selftest_show()
353 	struct tsc200x *ts = dev_get_drvdata(dev);  in tsc200x_attr_is_visible()  local
357 		if (!ts->set_reset && !ts->reset_gpio)  in tsc200x_attr_is_visible()
371 	struct tsc200x *ts = container_of(work, struct tsc200x, esd_work.work);  in tsc200x_esd_work()  local
375 	if (!mutex_trylock(&ts->mutex)) {  in tsc200x_esd_work()
384 	if (time_is_after_jiffies(ts->last_valid_interrupt +  in tsc200x_esd_work()
385 				  msecs_to_jiffies(ts->esd_timeout)))  in tsc200x_esd_work()
389 	error = regmap_read(ts->regmap, TSC200X_REG_CFR0, &r);  in tsc200x_esd_work()
400 	dev_info(ts->dev, "TSC200X not responding - resetting\n");  in tsc200x_esd_work()
402 	disable_irq(ts->irq);  in tsc200x_esd_work()
403 	del_timer_sync(&ts->penup_timer);  in tsc200x_esd_work()
405 	tsc200x_update_pen_state(ts, 0, 0, 0);  in tsc200x_esd_work()
407 	tsc200x_set_reset(ts, false);  in tsc200x_esd_work()
409 	tsc200x_set_reset(ts, true);  in tsc200x_esd_work()
411 	enable_irq(ts->irq);  in tsc200x_esd_work()
412 	tsc200x_start_scan(ts);  in tsc200x_esd_work()
415 	mutex_unlock(&ts->mutex);  in tsc200x_esd_work()
418 	schedule_delayed_work(&ts->esd_work,  in tsc200x_esd_work()
420 					msecs_to_jiffies(ts->esd_timeout)));  in tsc200x_esd_work()
425 	struct tsc200x *ts = input_get_drvdata(input);  in tsc200x_open()  local
427 	mutex_lock(&ts->mutex);  in tsc200x_open()
429 	if (!ts->suspended)  in tsc200x_open()
430 		__tsc200x_enable(ts);  in tsc200x_open()
432 	ts->opened = true;  in tsc200x_open()
434 	mutex_unlock(&ts->mutex);  in tsc200x_open()
441 	struct tsc200x *ts = input_get_drvdata(input);  in tsc200x_close()  local
443 	mutex_lock(&ts->mutex);  in tsc200x_close()
445 	if (!ts->suspended)  in tsc200x_close()
446 		__tsc200x_disable(ts);  in tsc200x_close()
448 	ts->opened = false;  in tsc200x_close()
450 	mutex_unlock(&ts->mutex);  in tsc200x_close()
460 	struct tsc200x *ts;  in tsc200x_probe()  local
507 	ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);  in tsc200x_probe()
508 	if (!ts)  in tsc200x_probe()
515 	ts->irq = irq;  in tsc200x_probe()
516 	ts->dev = dev;  in tsc200x_probe()
517 	ts->idev = input_dev;  in tsc200x_probe()
518 	ts->regmap = regmap;  in tsc200x_probe()
519 	ts->tsc200x_cmd = tsc200x_cmd;  in tsc200x_probe()
520 	ts->x_plate_ohm = x_plate_ohm;  in tsc200x_probe()
521 	ts->esd_timeout = esd_timeout;  in tsc200x_probe()
523 	ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);  in tsc200x_probe()
524 	if (IS_ERR(ts->reset_gpio)) {  in tsc200x_probe()
525 		error = PTR_ERR(ts->reset_gpio);  in tsc200x_probe()
530 	ts->vio = devm_regulator_get_optional(dev, "vio");  in tsc200x_probe()
531 	if (IS_ERR(ts->vio)) {  in tsc200x_probe()
532 		error = PTR_ERR(ts->vio);  in tsc200x_probe()
537 	if (!ts->reset_gpio && pdata)  in tsc200x_probe()
538 		ts->set_reset = pdata->set_reset;  in tsc200x_probe()
540 	mutex_init(&ts->mutex);  in tsc200x_probe()
542 	spin_lock_init(&ts->lock);  in tsc200x_probe()
543 	setup_timer(&ts->penup_timer, tsc200x_penup_timer, (unsigned long)ts);  in tsc200x_probe()
545 	INIT_DELAYED_WORK(&ts->esd_work, tsc200x_esd_work);  in tsc200x_probe()
547 	snprintf(ts->phys, sizeof(ts->phys),  in tsc200x_probe()
551 	input_dev->phys = ts->phys;  in tsc200x_probe()
567 	input_set_drvdata(input_dev, ts);  in tsc200x_probe()
570 	tsc200x_stop_scan(ts);  in tsc200x_probe()
575 					  "tsc200x", ts);  in tsc200x_probe()
582 	if (ts->vio) {  in tsc200x_probe()
583 		error = regulator_enable(ts->vio);  in tsc200x_probe()
588 	dev_set_drvdata(dev, ts);  in tsc200x_probe()
596 	error = input_register_device(ts->idev);  in tsc200x_probe()
609 	if (ts->vio)  in tsc200x_probe()
610 		regulator_disable(ts->vio);  in tsc200x_probe()
617 	struct tsc200x *ts = dev_get_drvdata(dev);  in tsc200x_remove()  local
621 	if (ts->vio)  in tsc200x_remove()
622 		regulator_disable(ts->vio);  in tsc200x_remove()
630 	struct tsc200x *ts = dev_get_drvdata(dev);  in tsc200x_suspend()  local
632 	mutex_lock(&ts->mutex);  in tsc200x_suspend()
634 	if (!ts->suspended && ts->opened)  in tsc200x_suspend()
635 		__tsc200x_disable(ts);  in tsc200x_suspend()
637 	ts->suspended = true;  in tsc200x_suspend()
639 	mutex_unlock(&ts->mutex);  in tsc200x_suspend()
646 	struct tsc200x *ts = dev_get_drvdata(dev);  in tsc200x_resume()  local
648 	mutex_lock(&ts->mutex);  in tsc200x_resume()
650 	if (ts->suspended && ts->opened)  in tsc200x_resume()
651 		__tsc200x_enable(ts);  in tsc200x_resume()
653 	ts->suspended = false;  in tsc200x_resume()
655 	mutex_unlock(&ts->mutex);  in tsc200x_resume()