161 static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)  in tsc2005_cmd()  argument
175 	error = spi_sync(ts->spi, &msg);  in tsc2005_cmd()
177 		dev_err(&ts->spi->dev, "%s: failed, command: %x, error: %d\n",  in tsc2005_cmd()
185 static int tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value)  in tsc2005_write()  argument
199 	error = spi_sync(ts->spi, &msg);  in tsc2005_write()
201 		dev_err(&ts->spi->dev,  in tsc2005_write()
222 static int tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value)  in tsc2005_read()  argument
233 	error = spi_sync(ts->spi, &msg);  in tsc2005_read()
241 static void tsc2005_update_pen_state(struct tsc2005 *ts,  in tsc2005_update_pen_state()  argument
245 		input_report_abs(ts->idev, ABS_X, x);  in tsc2005_update_pen_state()
246 		input_report_abs(ts->idev, ABS_Y, y);  in tsc2005_update_pen_state()
247 		input_report_abs(ts->idev, ABS_PRESSURE, pressure);  in tsc2005_update_pen_state()
248 		if (!ts->pen_down) {  in tsc2005_update_pen_state()
249 			input_report_key(ts->idev, BTN_TOUCH, !!pressure);  in tsc2005_update_pen_state()
250 			ts->pen_down = true;  in tsc2005_update_pen_state()
253 		input_report_abs(ts->idev, ABS_PRESSURE, 0);  in tsc2005_update_pen_state()
254 		if (ts->pen_down) {  in tsc2005_update_pen_state()
255 			input_report_key(ts->idev, BTN_TOUCH, 0);  in tsc2005_update_pen_state()
256 			ts->pen_down = false;  in tsc2005_update_pen_state()
259 	input_sync(ts->idev);  in tsc2005_update_pen_state()
260 	dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,  in tsc2005_update_pen_state()
266 	struct tsc2005 *ts = _ts;  in tsc2005_irq_thread()  local
274 	error = spi_sync(ts->spi, &ts->spi_read_msg);  in tsc2005_irq_thread()
278 	x = ts->spi_x.spi_rx;  in tsc2005_irq_thread()
279 	y = ts->spi_y.spi_rx;  in tsc2005_irq_thread()
280 	z1 = ts->spi_z1.spi_rx;  in tsc2005_irq_thread()
281 	z2 = ts->spi_z2.spi_rx;  in tsc2005_irq_thread()
295 	if (!ts->pen_down &&  in tsc2005_irq_thread()
296 	    ts->in_x == x && ts->in_y == y &&  in tsc2005_irq_thread()
297 	    ts->in_z1 == z1 && ts->in_z2 == z2) {  in tsc2005_irq_thread()
305 	ts->in_x = x;  in tsc2005_irq_thread()
306 	ts->in_y = y;  in tsc2005_irq_thread()
307 	ts->in_z1 = z1;  in tsc2005_irq_thread()
308 	ts->in_z2 = z2;  in tsc2005_irq_thread()
312 	pressure = pressure * ts->x_plate_ohm / 4096;  in tsc2005_irq_thread()
316 	spin_lock_irqsave(&ts->lock, flags);  in tsc2005_irq_thread()
318 	tsc2005_update_pen_state(ts, x, y, pressure);  in tsc2005_irq_thread()
319 	mod_timer(&ts->penup_timer,  in tsc2005_irq_thread()
322 	spin_unlock_irqrestore(&ts->lock, flags);  in tsc2005_irq_thread()
324 	ts->last_valid_interrupt = jiffies;  in tsc2005_irq_thread()
331 	struct tsc2005 *ts = (struct tsc2005 *)data;  in tsc2005_penup_timer()  local
334 	spin_lock_irqsave(&ts->lock, flags);  in tsc2005_penup_timer()
335 	tsc2005_update_pen_state(ts, 0, 0, 0);  in tsc2005_penup_timer()
336 	spin_unlock_irqrestore(&ts->lock, flags);  in tsc2005_penup_timer()
339 static void tsc2005_start_scan(struct tsc2005 *ts)  in tsc2005_start_scan()  argument
341 	tsc2005_write(ts, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);  in tsc2005_start_scan()
342 	tsc2005_write(ts, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);  in tsc2005_start_scan()
343 	tsc2005_write(ts, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);  in tsc2005_start_scan()
344 	tsc2005_cmd(ts, TSC2005_CMD_NORMAL);  in tsc2005_start_scan()
347 static void tsc2005_stop_scan(struct tsc2005 *ts)  in tsc2005_stop_scan()  argument
349 	tsc2005_cmd(ts, TSC2005_CMD_STOP);  in tsc2005_stop_scan()
352 static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)  in tsc2005_set_reset()  argument
354 	if (ts->reset_gpio >= 0)  in tsc2005_set_reset()
355 		gpio_set_value(ts->reset_gpio, enable);  in tsc2005_set_reset()
356 	else if (ts->set_reset)  in tsc2005_set_reset()
357 		ts->set_reset(enable);  in tsc2005_set_reset()
361 static void __tsc2005_disable(struct tsc2005 *ts)  in __tsc2005_disable()  argument
363 	tsc2005_stop_scan(ts);  in __tsc2005_disable()
365 	disable_irq(ts->spi->irq);  in __tsc2005_disable()
366 	del_timer_sync(&ts->penup_timer);  in __tsc2005_disable()
368 	cancel_delayed_work_sync(&ts->esd_work);  in __tsc2005_disable()
370 	enable_irq(ts->spi->irq);  in __tsc2005_disable()
374 static void __tsc2005_enable(struct tsc2005 *ts)  in __tsc2005_enable()  argument
376 	tsc2005_start_scan(ts);  in __tsc2005_enable()
378 	if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {  in __tsc2005_enable()
379 		ts->last_valid_interrupt = jiffies;  in __tsc2005_enable()
380 		schedule_delayed_work(&ts->esd_work,  in __tsc2005_enable()
382 					msecs_to_jiffies(ts->esd_timeout)));  in __tsc2005_enable()
392 	struct tsc2005 *ts = spi_get_drvdata(spi);  in tsc2005_selftest_show()  local
399 	mutex_lock(&ts->mutex);  in tsc2005_selftest_show()
404 	__tsc2005_disable(ts);  in tsc2005_selftest_show()
406 	error = tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);  in tsc2005_selftest_show()
415 	error = tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);  in tsc2005_selftest_show()
422 	error = tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);  in tsc2005_selftest_show()
437 	tsc2005_set_reset(ts, false);  in tsc2005_selftest_show()
439 	tsc2005_set_reset(ts, true);  in tsc2005_selftest_show()
445 	error = tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);  in tsc2005_selftest_show()
460 	__tsc2005_enable(ts);  in tsc2005_selftest_show()
461 	mutex_unlock(&ts->mutex);  in tsc2005_selftest_show()
478 	struct tsc2005 *ts = spi_get_drvdata(spi);  in tsc2005_attr_is_visible()  local
482 		if (!ts->set_reset && !ts->reset_gpio)  in tsc2005_attr_is_visible()
496 	struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work.work);  in tsc2005_esd_work()  local
500 	if (!mutex_trylock(&ts->mutex)) {  in tsc2005_esd_work()
509 	if (time_is_after_jiffies(ts->last_valid_interrupt +  in tsc2005_esd_work()
510 				  msecs_to_jiffies(ts->esd_timeout)))  in tsc2005_esd_work()
514 	error = tsc2005_read(ts, TSC2005_REG_CFR0, &r);  in tsc2005_esd_work()
525 	dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");  in tsc2005_esd_work()
527 	disable_irq(ts->spi->irq);  in tsc2005_esd_work()
528 	del_timer_sync(&ts->penup_timer);  in tsc2005_esd_work()
530 	tsc2005_update_pen_state(ts, 0, 0, 0);  in tsc2005_esd_work()
532 	tsc2005_set_reset(ts, false);  in tsc2005_esd_work()
534 	tsc2005_set_reset(ts, true);  in tsc2005_esd_work()
536 	enable_irq(ts->spi->irq);  in tsc2005_esd_work()
537 	tsc2005_start_scan(ts);  in tsc2005_esd_work()
540 	mutex_unlock(&ts->mutex);  in tsc2005_esd_work()
543 	schedule_delayed_work(&ts->esd_work,  in tsc2005_esd_work()
545 					msecs_to_jiffies(ts->esd_timeout)));  in tsc2005_esd_work()
550 	struct tsc2005 *ts = input_get_drvdata(input);  in tsc2005_open()  local
552 	mutex_lock(&ts->mutex);  in tsc2005_open()
554 	if (!ts->suspended)  in tsc2005_open()
555 		__tsc2005_enable(ts);  in tsc2005_open()
557 	ts->opened = true;  in tsc2005_open()
559 	mutex_unlock(&ts->mutex);  in tsc2005_open()
566 	struct tsc2005 *ts = input_get_drvdata(input);  in tsc2005_close()  local
568 	mutex_lock(&ts->mutex);  in tsc2005_close()
570 	if (!ts->suspended)  in tsc2005_close()
571 		__tsc2005_disable(ts);  in tsc2005_close()
573 	ts->opened = false;  in tsc2005_close()
575 	mutex_unlock(&ts->mutex);  in tsc2005_close()
578 static void tsc2005_setup_spi_xfer(struct tsc2005 *ts)  in tsc2005_setup_spi_xfer()  argument
580 	tsc2005_setup_read(&ts->spi_x, TSC2005_REG_X, false);  in tsc2005_setup_spi_xfer()
581 	tsc2005_setup_read(&ts->spi_y, TSC2005_REG_Y, false);  in tsc2005_setup_spi_xfer()
582 	tsc2005_setup_read(&ts->spi_z1, TSC2005_REG_Z1, false);  in tsc2005_setup_spi_xfer()
583 	tsc2005_setup_read(&ts->spi_z2, TSC2005_REG_Z2, true);  in tsc2005_setup_spi_xfer()
585 	spi_message_init(&ts->spi_read_msg);  in tsc2005_setup_spi_xfer()
586 	spi_message_add_tail(&ts->spi_x.spi_xfer, &ts->spi_read_msg);  in tsc2005_setup_spi_xfer()
587 	spi_message_add_tail(&ts->spi_y.spi_xfer, &ts->spi_read_msg);  in tsc2005_setup_spi_xfer()
588 	spi_message_add_tail(&ts->spi_z1.spi_xfer, &ts->spi_read_msg);  in tsc2005_setup_spi_xfer()
589 	spi_message_add_tail(&ts->spi_z2.spi_xfer, &ts->spi_read_msg);  in tsc2005_setup_spi_xfer()
597 	struct tsc2005 *ts;  in tsc2005_probe()  local
645 	ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);  in tsc2005_probe()
646 	if (!ts)  in tsc2005_probe()
653 	ts->spi = spi;  in tsc2005_probe()
654 	ts->idev = input_dev;  in tsc2005_probe()
656 	ts->x_plate_ohm = x_plate_ohm;  in tsc2005_probe()
657 	ts->esd_timeout = esd_timeout;  in tsc2005_probe()
660 		ts->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);  in tsc2005_probe()
661 		if (ts->reset_gpio == -EPROBE_DEFER)  in tsc2005_probe()
662 			return ts->reset_gpio;  in tsc2005_probe()
663 		if (ts->reset_gpio < 0) {  in tsc2005_probe()
665 				ts->reset_gpio);  in tsc2005_probe()
666 			return ts->reset_gpio;  in tsc2005_probe()
669 		error = devm_gpio_request_one(&spi->dev, ts->reset_gpio, 0,  in tsc2005_probe()
677 		ts->vio = devm_regulator_get(&spi->dev, "vio");  in tsc2005_probe()
678 		if (IS_ERR(ts->vio)) {  in tsc2005_probe()
679 			error = PTR_ERR(ts->vio);  in tsc2005_probe()
684 		ts->reset_gpio = -1;  in tsc2005_probe()
685 		ts->set_reset = pdata->set_reset;  in tsc2005_probe()
688 	mutex_init(&ts->mutex);  in tsc2005_probe()
690 	spin_lock_init(&ts->lock);  in tsc2005_probe()
691 	setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);  in tsc2005_probe()
693 	INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);  in tsc2005_probe()
695 	tsc2005_setup_spi_xfer(ts);  in tsc2005_probe()
697 	snprintf(ts->phys, sizeof(ts->phys),  in tsc2005_probe()
701 	input_dev->phys = ts->phys;  in tsc2005_probe()
717 	input_set_drvdata(input_dev, ts);  in tsc2005_probe()
720 	tsc2005_stop_scan(ts);  in tsc2005_probe()
725 					  "tsc2005", ts);  in tsc2005_probe()
732 	if (ts->vio) {  in tsc2005_probe()
733 		error = regulator_enable(ts->vio);  in tsc2005_probe()
738 	spi_set_drvdata(spi, ts);  in tsc2005_probe()
746 	error = input_register_device(ts->idev);  in tsc2005_probe()
759 	if (ts->vio)  in tsc2005_probe()
760 		regulator_disable(ts->vio);  in tsc2005_probe()
766 	struct tsc2005 *ts = spi_get_drvdata(spi);  in tsc2005_remove()  local
770 	if (ts->vio)  in tsc2005_remove()
771 		regulator_disable(ts->vio);  in tsc2005_remove()
779 	struct tsc2005 *ts = spi_get_drvdata(spi);  in tsc2005_suspend()  local
781 	mutex_lock(&ts->mutex);  in tsc2005_suspend()
783 	if (!ts->suspended && ts->opened)  in tsc2005_suspend()
784 		__tsc2005_disable(ts);  in tsc2005_suspend()
786 	ts->suspended = true;  in tsc2005_suspend()
788 	mutex_unlock(&ts->mutex);  in tsc2005_suspend()
796 	struct tsc2005 *ts = spi_get_drvdata(spi);  in tsc2005_resume()  local
798 	mutex_lock(&ts->mutex);  in tsc2005_resume()
800 	if (ts->suspended && ts->opened)  in tsc2005_resume()
801 		__tsc2005_enable(ts);  in tsc2005_resume()
803 	ts->suspended = false;  in tsc2005_resume()
805 	mutex_unlock(&ts->mutex);  in tsc2005_resume()