203 static void ads7846_stop(struct ads7846 *ts)  in ads7846_stop()  argument
205 	if (!ts->disabled && !ts->suspended) {  in ads7846_stop()
207 		ts->stopped = true;  in ads7846_stop()
209 		wake_up(&ts->wait);  in ads7846_stop()
210 		disable_irq(ts->spi->irq);  in ads7846_stop()
215 static void ads7846_restart(struct ads7846 *ts)  in ads7846_restart()  argument
217 	if (!ts->disabled && !ts->suspended) {  in ads7846_restart()
219 		ts->stopped = false;  in ads7846_restart()
221 		enable_irq(ts->spi->irq);  in ads7846_restart()
226 static void __ads7846_disable(struct ads7846 *ts)  in __ads7846_disable()  argument
228 	ads7846_stop(ts);  in __ads7846_disable()
229 	regulator_disable(ts->reg);  in __ads7846_disable()
238 static void __ads7846_enable(struct ads7846 *ts)  in __ads7846_enable()  argument
242 	error = regulator_enable(ts->reg);  in __ads7846_enable()
244 		dev_err(&ts->spi->dev, "Failed to enable supply: %d\n", error);  in __ads7846_enable()
246 	ads7846_restart(ts);  in __ads7846_enable()
249 static void ads7846_disable(struct ads7846 *ts)  in ads7846_disable()  argument
251 	mutex_lock(&ts->lock);  in ads7846_disable()
253 	if (!ts->disabled) {  in ads7846_disable()
255 		if  (!ts->suspended)  in ads7846_disable()
256 			__ads7846_disable(ts);  in ads7846_disable()
258 		ts->disabled = true;  in ads7846_disable()
261 	mutex_unlock(&ts->lock);  in ads7846_disable()
264 static void ads7846_enable(struct ads7846 *ts)  in ads7846_enable()  argument
266 	mutex_lock(&ts->lock);  in ads7846_enable()
268 	if (ts->disabled) {  in ads7846_enable()
270 		ts->disabled = false;  in ads7846_enable()
272 		if (!ts->suspended)  in ads7846_enable()
273 			__ads7846_enable(ts);  in ads7846_enable()
276 	mutex_unlock(&ts->lock);  in ads7846_enable()
315 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_read12_ser()  local
326 	if (ts->use_internal) {  in ads7846_read12_ser()
336 		req->xfer[1].delay_usecs = ts->vref_delay_usecs;  in ads7846_read12_ser()
369 	mutex_lock(&ts->lock);  in ads7846_read12_ser()
370 	ads7846_stop(ts);  in ads7846_read12_ser()
372 	ads7846_restart(ts);  in ads7846_read12_ser()
373 	mutex_unlock(&ts->lock);  in ads7846_read12_ser()
389 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7845_read12_ser()  local
405 	mutex_lock(&ts->lock);  in ads7845_read12_ser()
406 	ads7846_stop(ts);  in ads7845_read12_ser()
408 	ads7846_restart(ts);  in ads7845_read12_ser()
409 	mutex_unlock(&ts->lock);  in ads7845_read12_ser()
427 	struct ads7846 *ts = dev_get_drvdata(dev); \
428 	ssize_t v = ads7846_read12_ser(&ts->spi->dev, \
432 	return sprintf(buf, "%u\n", adjust(ts, v)); \
442 static inline unsigned null_adjust(struct ads7846 *ts, ssize_t v)  in null_adjust()  argument
455 static inline unsigned vaux_adjust(struct ads7846 *ts, ssize_t v)  in SHOW()
460 	retval *= ts->vref_mv;  in SHOW()
466 static inline unsigned vbatt_adjust(struct ads7846 *ts, ssize_t v)  in vbatt_adjust()  argument
468 	unsigned retval = vaux_adjust(ts, v);  in vbatt_adjust()
471 	if (ts->model == 7846)  in vbatt_adjust()
484 	struct ads7846 *ts = dev_get_drvdata(dev);  in SHOW()  local
486 	if (ts->model == 7843 && index < 2)	/* in0, in1 */  in SHOW()
488 	if (ts->model == 7845 && index != 2)	/* in0 */  in SHOW()
508 static int ads784x_hwmon_register(struct spi_device *spi, struct ads7846 *ts)  in ads784x_hwmon_register()  argument
511 	switch (ts->model) {  in ads784x_hwmon_register()
513 		if (!ts->vref_mv) {  in ads784x_hwmon_register()
515 			ts->vref_mv = 2500;  in ads784x_hwmon_register()
516 			ts->use_internal = true;  in ads784x_hwmon_register()
521 		if (!ts->vref_mv) {  in ads784x_hwmon_register()
524 				ts->model);  in ads784x_hwmon_register()
530 	ts->hwmon = hwmon_device_register_with_groups(&spi->dev, spi->modalias,  in ads784x_hwmon_register()
531 						      ts, ads7846_attr_groups);  in ads784x_hwmon_register()
533 	return PTR_ERR_OR_ZERO(ts->hwmon);  in ads784x_hwmon_register()
537 				     struct ads7846 *ts)  in ads784x_hwmon_unregister()  argument
539 	if (ts->hwmon)  in ads784x_hwmon_unregister()
540 		hwmon_device_unregister(ts->hwmon);  in ads784x_hwmon_unregister()
545 					 struct ads7846 *ts)  in ads784x_hwmon_register()  argument
551 					    struct ads7846 *ts)  in ads784x_hwmon_unregister()  argument
559 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_pen_down_show()  local
561 	return sprintf(buf, "%u\n", ts->pendown);  in ads7846_pen_down_show()
569 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_disable_show()  local
571 	return sprintf(buf, "%u\n", ts->disabled);  in ads7846_disable_show()
578 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_disable_store()  local
587 		ads7846_disable(ts);  in ads7846_disable_store()
589 		ads7846_enable(ts);  in ads7846_disable_store()
608 static int get_pendown_state(struct ads7846 *ts)  in get_pendown_state()  argument
610 	if (ts->get_pendown_state)  in get_pendown_state()
611 		return ts->get_pendown_state();  in get_pendown_state()
613 	return !gpio_get_value(ts->gpio_pendown);  in get_pendown_state()
622 	struct ads7846 *ts = ads;  in ads7846_debounce_filter()  local
624 	if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) {  in ads7846_debounce_filter()
626 		ts->read_rep = 0;  in ads7846_debounce_filter()
631 		if (ts->read_cnt < ts->debounce_max) {  in ads7846_debounce_filter()
632 			ts->last_read = *val;  in ads7846_debounce_filter()
633 			ts->read_cnt++;  in ads7846_debounce_filter()
642 			ts->read_cnt = 0;  in ads7846_debounce_filter()
646 		if (++ts->read_rep > ts->debounce_rep) {  in ads7846_debounce_filter()
651 			ts->read_cnt = 0;  in ads7846_debounce_filter()
652 			ts->read_rep = 0;  in ads7846_debounce_filter()
656 			ts->read_cnt++;  in ads7846_debounce_filter()
667 static int ads7846_get_value(struct ads7846 *ts, struct spi_message *m)  in ads7846_get_value()  argument
673 	if (ts->model == 7845) {  in ads7846_get_value()
695 static void ads7846_read_state(struct ads7846 *ts)  in ads7846_read_state()  argument
697 	struct ads7846_packet *packet = ts->packet;  in ads7846_read_state()
704 	while (msg_idx < ts->msg_count) {  in ads7846_read_state()
706 		ts->wait_for_sync();  in ads7846_read_state()
708 		m = &ts->msg[msg_idx];  in ads7846_read_state()
709 		error = spi_sync(ts->spi, m);  in ads7846_read_state()
711 			dev_err(&ts->spi->dev, "spi_sync --> %d\n", error);  in ads7846_read_state()
720 		if (msg_idx < ts->msg_count - 1) {  in ads7846_read_state()
722 			val = ads7846_get_value(ts, m);  in ads7846_read_state()
724 			action = ts->filter(ts->filter_data, msg_idx, &val);  in ads7846_read_state()
731 				msg_idx = ts->msg_count - 1;  in ads7846_read_state()
749 static void ads7846_report_state(struct ads7846 *ts)  in ads7846_report_state()  argument
751 	struct ads7846_packet *packet = ts->packet;  in ads7846_report_state()
760 	if (ts->model == 7845) {  in ads7846_report_state()
776 	if (ts->model == 7843) {  in ads7846_report_state()
777 		Rt = ts->pressure_max / 2;  in ads7846_report_state()
778 	} else if (ts->model == 7845) {  in ads7846_report_state()
779 		if (get_pendown_state(ts))  in ads7846_report_state()
780 			Rt = ts->pressure_max / 2;  in ads7846_report_state()
783 		dev_vdbg(&ts->spi->dev, "x/y: %d/%d, PD %d\n", x, y, Rt);  in ads7846_report_state()
789 		Rt *= ts->x_plate_ohms;  in ads7846_report_state()
801 	if (packet->tc.ignore || Rt > ts->pressure_max) {  in ads7846_report_state()
802 		dev_vdbg(&ts->spi->dev, "ignored %d pressure %d\n",  in ads7846_report_state()
811 	if (ts->penirq_recheck_delay_usecs) {  in ads7846_report_state()
812 		udelay(ts->penirq_recheck_delay_usecs);  in ads7846_report_state()
813 		if (!get_pendown_state(ts))  in ads7846_report_state()
827 		struct input_dev *input = ts->input;  in ads7846_report_state()
829 		if (ts->swap_xy)  in ads7846_report_state()
832 		if (!ts->pendown) {  in ads7846_report_state()
834 			ts->pendown = true;  in ads7846_report_state()
835 			dev_vdbg(&ts->spi->dev, "DOWN\n");  in ads7846_report_state()
840 		input_report_abs(input, ABS_PRESSURE, ts->pressure_max - Rt);  in ads7846_report_state()
843 		dev_vdbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt);  in ads7846_report_state()
849 	struct ads7846 *ts = handle;  in ads7846_hard_irq()  local
851 	return get_pendown_state(ts) ? IRQ_WAKE_THREAD : IRQ_HANDLED;  in ads7846_hard_irq()
857 	struct ads7846 *ts = handle;  in ads7846_irq()  local
862 	while (!ts->stopped && get_pendown_state(ts)) {  in ads7846_irq()
865 		ads7846_read_state(ts);  in ads7846_irq()
867 		if (!ts->stopped)  in ads7846_irq()
868 			ads7846_report_state(ts);  in ads7846_irq()
870 		wait_event_timeout(ts->wait, ts->stopped,  in ads7846_irq()
874 	if (ts->pendown) {  in ads7846_irq()
875 		struct input_dev *input = ts->input;  in ads7846_irq()
881 		ts->pendown = false;  in ads7846_irq()
882 		dev_vdbg(&ts->spi->dev, "UP\n");  in ads7846_irq()
890 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_suspend()  local
892 	mutex_lock(&ts->lock);  in ads7846_suspend()
894 	if (!ts->suspended) {  in ads7846_suspend()
896 		if (!ts->disabled)  in ads7846_suspend()
897 			__ads7846_disable(ts);  in ads7846_suspend()
899 		if (device_may_wakeup(&ts->spi->dev))  in ads7846_suspend()
900 			enable_irq_wake(ts->spi->irq);  in ads7846_suspend()
902 		ts->suspended = true;  in ads7846_suspend()
905 	mutex_unlock(&ts->lock);  in ads7846_suspend()
912 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_resume()  local
914 	mutex_lock(&ts->lock);  in ads7846_resume()
916 	if (ts->suspended) {  in ads7846_resume()
918 		ts->suspended = false;  in ads7846_resume()
920 		if (device_may_wakeup(&ts->spi->dev))  in ads7846_resume()
921 			disable_irq_wake(ts->spi->irq);  in ads7846_resume()
923 		if (!ts->disabled)  in ads7846_resume()
924 			__ads7846_enable(ts);  in ads7846_resume()
927 	mutex_unlock(&ts->lock);  in ads7846_resume()
935 				 struct ads7846 *ts,  in ads7846_setup_pendown()  argument
947 		ts->get_pendown_state = pdata->get_pendown_state;  in ads7846_setup_pendown()
959 		ts->gpio_pendown = pdata->gpio_pendown;  in ads7846_setup_pendown()
976 static void ads7846_setup_spi_msg(struct ads7846 *ts,  in ads7846_setup_spi_msg()  argument
979 	struct spi_message *m = &ts->msg[0];  in ads7846_setup_spi_msg()
980 	struct spi_transfer *x = ts->xfer;  in ads7846_setup_spi_msg()
981 	struct ads7846_packet *packet = ts->packet;  in ads7846_setup_spi_msg()
984 	if (ts->model == 7873) {  in ads7846_setup_spi_msg()
990 		ts->model = 7846;  in ads7846_setup_spi_msg()
994 	ts->msg_count = 1;  in ads7846_setup_spi_msg()
996 	m->context = ts;  in ads7846_setup_spi_msg()
998 	if (ts->model == 7845) {  in ads7846_setup_spi_msg()
1038 	ts->msg_count++;  in ads7846_setup_spi_msg()
1041 	m->context = ts;  in ads7846_setup_spi_msg()
1043 	if (ts->model == 7845) {  in ads7846_setup_spi_msg()
1082 	if (ts->model == 7846) {  in ads7846_setup_spi_msg()
1083 		ts->msg_count++;  in ads7846_setup_spi_msg()
1086 		m->context = ts;  in ads7846_setup_spi_msg()
1114 		ts->msg_count++;  in ads7846_setup_spi_msg()
1117 		m->context = ts;  in ads7846_setup_spi_msg()
1147 	ts->msg_count++;  in ads7846_setup_spi_msg()
1150 	m->context = ts;  in ads7846_setup_spi_msg()
1152 	if (ts->model == 7845) {  in ads7846_setup_spi_msg()
1257 	struct ads7846 *ts;  in ads7846_probe()  local
1286 	ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL);  in ads7846_probe()
1289 	if (!ts || !packet || !input_dev) {  in ads7846_probe()
1294 	spi_set_drvdata(spi, ts);  in ads7846_probe()
1296 	ts->packet = packet;  in ads7846_probe()
1297 	ts->spi = spi;  in ads7846_probe()
1298 	ts->input = input_dev;  in ads7846_probe()
1300 	mutex_init(&ts->lock);  in ads7846_probe()
1301 	init_waitqueue_head(&ts->wait);  in ads7846_probe()
1312 	ts->model = pdata->model ? : 7846;  in ads7846_probe()
1313 	ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;  in ads7846_probe()
1314 	ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;  in ads7846_probe()
1315 	ts->pressure_max = pdata->pressure_max ? : ~0;  in ads7846_probe()
1317 	ts->vref_mv = pdata->vref_mv;  in ads7846_probe()
1318 	ts->swap_xy = pdata->swap_xy;  in ads7846_probe()
1322 			err = pdata->filter_init(pdata, &ts->filter_data);  in ads7846_probe()
1326 		ts->filter = pdata->filter;  in ads7846_probe()
1327 		ts->filter_cleanup = pdata->filter_cleanup;  in ads7846_probe()
1329 		ts->debounce_max = pdata->debounce_max;  in ads7846_probe()
1330 		if (ts->debounce_max < 2)  in ads7846_probe()
1331 			ts->debounce_max = 2;  in ads7846_probe()
1332 		ts->debounce_tol = pdata->debounce_tol;  in ads7846_probe()
1333 		ts->debounce_rep = pdata->debounce_rep;  in ads7846_probe()
1334 		ts->filter = ads7846_debounce_filter;  in ads7846_probe()
1335 		ts->filter_data = ts;  in ads7846_probe()
1337 		ts->filter = ads7846_no_filter;  in ads7846_probe()
1340 	err = ads7846_setup_pendown(spi, ts, pdata);  in ads7846_probe()
1345 		ts->penirq_recheck_delay_usecs =  in ads7846_probe()
1348 	ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync;  in ads7846_probe()
1350 	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev));  in ads7846_probe()
1351 	snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model);  in ads7846_probe()
1353 	input_dev->name = ts->name;  in ads7846_probe()
1354 	input_dev->phys = ts->phys;  in ads7846_probe()
1370 	ads7846_setup_spi_msg(ts, pdata);  in ads7846_probe()
1372 	ts->reg = regulator_get(&spi->dev, "vcc");  in ads7846_probe()
1373 	if (IS_ERR(ts->reg)) {  in ads7846_probe()
1374 		err = PTR_ERR(ts->reg);  in ads7846_probe()
1379 	err = regulator_enable(ts->reg);  in ads7846_probe()
1389 				   irq_flags, spi->dev.driver->name, ts);  in ads7846_probe()
1396 				  irq_flags, spi->dev.driver->name, ts);  in ads7846_probe()
1404 	err = ads784x_hwmon_register(spi, ts);  in ads7846_probe()
1414 	if (ts->model == 7845)  in ads7846_probe()
1441 	ads784x_hwmon_unregister(spi, ts);  in ads7846_probe()
1443 	free_irq(spi->irq, ts);  in ads7846_probe()
1445 	regulator_disable(ts->reg);  in ads7846_probe()
1447 	regulator_put(ts->reg);  in ads7846_probe()
1449 	if (!ts->get_pendown_state)  in ads7846_probe()
1450 		gpio_free(ts->gpio_pendown);  in ads7846_probe()
1452 	if (ts->filter_cleanup)  in ads7846_probe()
1453 		ts->filter_cleanup(ts->filter_data);  in ads7846_probe()
1457 	kfree(ts);  in ads7846_probe()
1463 	struct ads7846 *ts = spi_get_drvdata(spi);  in ads7846_remove()  local
1469 	ads7846_disable(ts);  in ads7846_remove()
1470 	free_irq(ts->spi->irq, ts);  in ads7846_remove()
1472 	input_unregister_device(ts->input);  in ads7846_remove()
1474 	ads784x_hwmon_unregister(spi, ts);  in ads7846_remove()
1476 	regulator_disable(ts->reg);  in ads7846_remove()
1477 	regulator_put(ts->reg);  in ads7846_remove()
1479 	if (!ts->get_pendown_state) {  in ads7846_remove()
1484 		gpio_free(ts->gpio_pendown);  in ads7846_remove()
1487 	if (ts->filter_cleanup)  in ads7846_remove()
1488 		ts->filter_cleanup(ts->filter_data);  in ads7846_remove()
1490 	kfree(ts->packet);  in ads7846_remove()
1491 	kfree(ts);  in ads7846_remove()