219 static int get_pendown_state(struct ads7846 *ts)  in get_pendown_state()  argument
221 	if (ts->get_pendown_state)  in get_pendown_state()
222 		return ts->get_pendown_state();  in get_pendown_state()
224 	return gpiod_get_value(ts->gpio_pendown);  in get_pendown_state()
227 static void ads7846_report_pen_up(struct ads7846 *ts)  in ads7846_report_pen_up()  argument
229 	struct input_dev *input = ts->input;  in ads7846_report_pen_up()
235 	ts->pendown = false;  in ads7846_report_pen_up()
236 	dev_vdbg(&ts->spi->dev, "UP\n");  in ads7846_report_pen_up()
239 /* Must be called with ts->lock held */
240 static void ads7846_stop(struct ads7846 *ts)  in ads7846_stop()  argument
242 	if (!ts->disabled && !ts->suspended) {  in ads7846_stop()
244 		ts->stopped = true;  in ads7846_stop()
246 		wake_up(&ts->wait);  in ads7846_stop()
247 		disable_irq(ts->spi->irq);  in ads7846_stop()
251 /* Must be called with ts->lock held */
252 static void ads7846_restart(struct ads7846 *ts)  in ads7846_restart()  argument
254 	if (!ts->disabled && !ts->suspended) {  in ads7846_restart()
256 		if (ts->pendown && !get_pendown_state(ts))  in ads7846_restart()
257 			ads7846_report_pen_up(ts);  in ads7846_restart()
260 		ts->stopped = false;  in ads7846_restart()
262 		enable_irq(ts->spi->irq);  in ads7846_restart()
266 /* Must be called with ts->lock held */
267 static void __ads7846_disable(struct ads7846 *ts)  in __ads7846_disable()  argument
269 	ads7846_stop(ts);  in __ads7846_disable()
270 	regulator_disable(ts->reg);  in __ads7846_disable()
278 /* Must be called with ts->lock held */
279 static void __ads7846_enable(struct ads7846 *ts)  in __ads7846_enable()  argument
283 	error = regulator_enable(ts->reg);  in __ads7846_enable()
285 		dev_err(&ts->spi->dev, "Failed to enable supply: %d\n", error);  in __ads7846_enable()
287 	ads7846_restart(ts);  in __ads7846_enable()
290 static void ads7846_disable(struct ads7846 *ts)  in ads7846_disable()  argument
292 	mutex_lock(&ts->lock);  in ads7846_disable()
294 	if (!ts->disabled) {  in ads7846_disable()
296 		if  (!ts->suspended)  in ads7846_disable()
297 			__ads7846_disable(ts);  in ads7846_disable()
299 		ts->disabled = true;  in ads7846_disable()
302 	mutex_unlock(&ts->lock);  in ads7846_disable()
305 static void ads7846_enable(struct ads7846 *ts)  in ads7846_enable()  argument
307 	mutex_lock(&ts->lock);  in ads7846_enable()
309 	if (ts->disabled) {  in ads7846_enable()
311 		ts->disabled = false;  in ads7846_enable()
313 		if (!ts->suspended)  in ads7846_enable()
314 			__ads7846_enable(ts);  in ads7846_enable()
317 	mutex_unlock(&ts->lock);  in ads7846_enable()
356 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_read12_ser()  local
367 	if (ts->use_internal) {  in ads7846_read12_ser()
377 		req->xfer[1].delay.value = ts->vref_delay_usecs;  in ads7846_read12_ser()
421 	mutex_lock(&ts->lock);  in ads7846_read12_ser()
422 	ads7846_stop(ts);  in ads7846_read12_ser()
424 	ads7846_restart(ts);  in ads7846_read12_ser()
425 	mutex_unlock(&ts->lock);  in ads7846_read12_ser()
441 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7845_read12_ser()  local
457 	mutex_lock(&ts->lock);  in ads7845_read12_ser()
458 	ads7846_stop(ts);  in ads7845_read12_ser()
460 	ads7846_restart(ts);  in ads7845_read12_ser()
461 	mutex_unlock(&ts->lock);  in ads7845_read12_ser()
479 	struct ads7846 *ts = dev_get_drvdata(dev); \
480 	ssize_t v = ads7846_read12_ser(&ts->spi->dev, \
484 	return sprintf(buf, "%u\n", adjust(ts, v)); \
494 static inline unsigned null_adjust(struct ads7846 *ts, ssize_t v)  in null_adjust()  argument
507 static inline unsigned vaux_adjust(struct ads7846 *ts, ssize_t v)  in SHOW()
512 	retval *= ts->vref_mv;  in SHOW()
518 static inline unsigned vbatt_adjust(struct ads7846 *ts, ssize_t v)  in vbatt_adjust()  argument
520 	unsigned retval = vaux_adjust(ts, v);  in vbatt_adjust()
523 	if (ts->model == 7846)  in vbatt_adjust()
536 	struct ads7846 *ts = dev_get_drvdata(dev);  in SHOW()  local
538 	if (ts->model == 7843 && index < 2)	/* in0, in1 */  in SHOW()
540 	if (ts->model == 7845 && index != 2)	/* in0 */  in SHOW()
560 static int ads784x_hwmon_register(struct spi_device *spi, struct ads7846 *ts)  in ads784x_hwmon_register()  argument
565 	switch (ts->model) {  in ads784x_hwmon_register()
567 		if (!ts->vref_mv) {  in ads784x_hwmon_register()
569 			ts->vref_mv = 2500;  in ads784x_hwmon_register()
570 			ts->use_internal = true;  in ads784x_hwmon_register()
575 		if (!ts->vref_mv) {  in ads784x_hwmon_register()
578 				ts->model);  in ads784x_hwmon_register()
585 						       spi->modalias, ts,  in ads784x_hwmon_register()
593 					 struct ads7846 *ts)  in ads784x_hwmon_register()  argument
602 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_pen_down_show()  local
604 	return sprintf(buf, "%u\n", ts->pendown);  in ads7846_pen_down_show()
612 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_disable_show()  local
614 	return sprintf(buf, "%u\n", ts->disabled);  in ads7846_disable_show()
621 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_disable_store()  local
630 		ads7846_disable(ts);  in ads7846_disable_store()
632 		ads7846_enable(ts);  in ads7846_disable_store()
650 	struct ads7846 *ts = ads;  in ads7846_debounce_filter()  local
652 	if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) {  in ads7846_debounce_filter()
654 		ts->read_rep = 0;  in ads7846_debounce_filter()
659 		if (ts->read_cnt < ts->debounce_max) {  in ads7846_debounce_filter()
660 			ts->last_read = *val;  in ads7846_debounce_filter()
661 			ts->read_cnt++;  in ads7846_debounce_filter()
670 			ts->read_cnt = 0;  in ads7846_debounce_filter()
674 		if (++ts->read_rep > ts->debounce_rep) {  in ads7846_debounce_filter()
679 			ts->read_cnt = 0;  in ads7846_debounce_filter()
680 			ts->read_rep = 0;  in ads7846_debounce_filter()
684 			ts->read_cnt++;  in ads7846_debounce_filter()
705 static void ads7846_set_cmd_val(struct ads7846 *ts, enum ads7846_cmds cmd_idx,  in ads7846_set_cmd_val()  argument
708 	struct ads7846_packet *packet = ts->packet;  in ads7846_set_cmd_val()
767 static int ads7846_filter(struct ads7846 *ts)  in ads7846_filter()  argument
769 	struct ads7846_packet *packet = ts->packet;  in ads7846_filter()
783 			action = ts->filter(ts->filter_data, cmd_idx, &val);  in ads7846_filter()
788 				ads7846_set_cmd_val(ts, cmd_idx, val);  in ads7846_filter()
800 static void ads7846_wait_for_hsync(struct ads7846 *ts)  in ads7846_wait_for_hsync()  argument
802 	if (ts->wait_for_sync) {  in ads7846_wait_for_hsync()
803 		ts->wait_for_sync();  in ads7846_wait_for_hsync()
807 	if (!ts->gpio_hsync)  in ads7846_wait_for_hsync()
814 	while (!gpiod_get_value(ts->gpio_hsync))  in ads7846_wait_for_hsync()
818 	while (gpiod_get_value(ts->gpio_hsync))  in ads7846_wait_for_hsync()
822 static void ads7846_read_state(struct ads7846 *ts)  in ads7846_read_state()  argument
824 	struct ads7846_packet *packet = ts->packet;  in ads7846_read_state()
832 		ads7846_wait_for_hsync(ts);  in ads7846_read_state()
834 		m = &ts->msg[msg_idx];  in ads7846_read_state()
835 		error = spi_sync(ts->spi, m);  in ads7846_read_state()
837 			dev_err_ratelimited(&ts->spi->dev, "spi_sync --> %d\n", error);  in ads7846_read_state()
842 		error = ads7846_filter(ts);  in ads7846_read_state()
850 static void ads7846_report_state(struct ads7846 *ts)  in ads7846_report_state()  argument
852 	struct ads7846_packet *packet = ts->packet;  in ads7846_report_state()
858 	if (ts->model == 7845) {  in ads7846_report_state()
870 	if (ts->model == 7843 || ts->model == 7845) {  in ads7846_report_state()
871 		Rt = ts->pressure_max / 2;  in ads7846_report_state()
876 		Rt *= ts->x_plate_ohms;  in ads7846_report_state()
890 	if (packet->ignore || Rt > ts->pressure_max) {  in ads7846_report_state()
891 		dev_vdbg(&ts->spi->dev, "ignored %d pressure %d\n",  in ads7846_report_state()
900 	if (ts->penirq_recheck_delay_usecs) {  in ads7846_report_state()
901 		udelay(ts->penirq_recheck_delay_usecs);  in ads7846_report_state()
902 		if (!get_pendown_state(ts))  in ads7846_report_state()
916 		struct input_dev *input = ts->input;  in ads7846_report_state()
918 		if (!ts->pendown) {  in ads7846_report_state()
920 			ts->pendown = true;  in ads7846_report_state()
921 			dev_vdbg(&ts->spi->dev, "DOWN\n");  in ads7846_report_state()
924 		touchscreen_report_pos(input, &ts->core_prop, x, y, false);  in ads7846_report_state()
925 		input_report_abs(input, ABS_PRESSURE, ts->pressure_max - Rt);  in ads7846_report_state()
928 		dev_vdbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt);  in ads7846_report_state()
934 	struct ads7846 *ts = handle;  in ads7846_hard_irq()  local
936 	return get_pendown_state(ts) ? IRQ_WAKE_THREAD : IRQ_HANDLED;  in ads7846_hard_irq()
942 	struct ads7846 *ts = handle;  in ads7846_irq()  local
947 	while (!ts->stopped && get_pendown_state(ts)) {  in ads7846_irq()
950 		ads7846_read_state(ts);  in ads7846_irq()
952 		if (!ts->stopped)  in ads7846_irq()
953 			ads7846_report_state(ts);  in ads7846_irq()
955 		wait_event_timeout(ts->wait, ts->stopped,  in ads7846_irq()
959 	if (ts->pendown && !ts->stopped)  in ads7846_irq()
960 		ads7846_report_pen_up(ts);  in ads7846_irq()
967 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_suspend()  local
969 	mutex_lock(&ts->lock);  in ads7846_suspend()
971 	if (!ts->suspended) {  in ads7846_suspend()
973 		if (!ts->disabled)  in ads7846_suspend()
974 			__ads7846_disable(ts);  in ads7846_suspend()
976 		if (device_may_wakeup(&ts->spi->dev))  in ads7846_suspend()
977 			enable_irq_wake(ts->spi->irq);  in ads7846_suspend()
979 		ts->suspended = true;  in ads7846_suspend()
982 	mutex_unlock(&ts->lock);  in ads7846_suspend()
989 	struct ads7846 *ts = dev_get_drvdata(dev);  in ads7846_resume()  local
991 	mutex_lock(&ts->lock);  in ads7846_resume()
993 	if (ts->suspended) {  in ads7846_resume()
995 		ts->suspended = false;  in ads7846_resume()
997 		if (device_may_wakeup(&ts->spi->dev))  in ads7846_resume()
998 			disable_irq_wake(ts->spi->irq);  in ads7846_resume()
1000 		if (!ts->disabled)  in ads7846_resume()
1001 			__ads7846_enable(ts);  in ads7846_resume()
1004 	mutex_unlock(&ts->lock);  in ads7846_resume()
1012 				 struct ads7846 *ts,  in ads7846_setup_pendown()  argument
1022 		ts->get_pendown_state = pdata->get_pendown_state;  in ads7846_setup_pendown()
1024 		ts->gpio_pendown = devm_gpiod_get(&spi->dev, "pendown", GPIOD_IN);  in ads7846_setup_pendown()
1025 		if (IS_ERR(ts->gpio_pendown)) {  in ads7846_setup_pendown()
1027 			return PTR_ERR(ts->gpio_pendown);  in ads7846_setup_pendown()
1030 			gpiod_set_debounce(ts->gpio_pendown,  in ads7846_setup_pendown()
1041 static int ads7846_setup_spi_msg(struct ads7846 *ts,  in ads7846_setup_spi_msg()  argument
1044 	struct spi_message *m = &ts->msg[0];  in ads7846_setup_spi_msg()
1045 	struct spi_transfer *x = ts->xfer;  in ads7846_setup_spi_msg()
1046 	struct ads7846_packet *packet = ts->packet;  in ads7846_setup_spi_msg()
1054 	time = NSEC_PER_SEC / ts->spi->max_speed_hz;  in ads7846_setup_spi_msg()
1059 	if (ts->debounce_max && ts->debounce_rep)  in ads7846_setup_spi_msg()
1060 		/* ads7846_debounce_filter() is making ts->debounce_rep + 2  in ads7846_setup_spi_msg()
1062 		packet->count = ts->debounce_rep + 2;  in ads7846_setup_spi_msg()
1066 	if (ts->model == 7846)  in ads7846_setup_spi_msg()
1090 	packet->tx = devm_kzalloc(&ts->spi->dev, size, GFP_KERNEL);  in ads7846_setup_spi_msg()
1094 	packet->rx = devm_kzalloc(&ts->spi->dev, size, GFP_KERNEL);  in ads7846_setup_spi_msg()
1098 	if (ts->model == 7873) {  in ads7846_setup_spi_msg()
1104 		ts->model = 7846;  in ads7846_setup_spi_msg()
1108 	ts->msg_count = 1;  in ads7846_setup_spi_msg()
1110 	m->context = ts;  in ads7846_setup_spi_msg()
1216 	struct ads7846 *ts;  in ads7846_probe()  local
1247 	ts = devm_kzalloc(dev, sizeof(struct ads7846), GFP_KERNEL);  in ads7846_probe()
1248 	if (!ts)  in ads7846_probe()
1259 	spi_set_drvdata(spi, ts);  in ads7846_probe()
1261 	ts->packet = packet;  in ads7846_probe()
1262 	ts->spi = spi;  in ads7846_probe()
1263 	ts->input = input_dev;  in ads7846_probe()
1265 	mutex_init(&ts->lock);  in ads7846_probe()
1266 	init_waitqueue_head(&ts->wait);  in ads7846_probe()
1275 	ts->model = pdata->model ? : 7846;  in ads7846_probe()
1276 	ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;  in ads7846_probe()
1277 	ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;  in ads7846_probe()
1278 	ts->vref_mv = pdata->vref_mv;  in ads7846_probe()
1281 		ts->debounce_max = pdata->debounce_max;  in ads7846_probe()
1282 		if (ts->debounce_max < 2)  in ads7846_probe()
1283 			ts->debounce_max = 2;  in ads7846_probe()
1284 		ts->debounce_tol = pdata->debounce_tol;  in ads7846_probe()
1285 		ts->debounce_rep = pdata->debounce_rep;  in ads7846_probe()
1286 		ts->filter = ads7846_debounce_filter;  in ads7846_probe()
1287 		ts->filter_data = ts;  in ads7846_probe()
1289 		ts->filter = ads7846_no_filter;  in ads7846_probe()
1292 	err = ads7846_setup_pendown(spi, ts, pdata);  in ads7846_probe()
1297 		ts->penirq_recheck_delay_usecs =  in ads7846_probe()
1300 	ts->wait_for_sync = pdata->wait_for_sync;  in ads7846_probe()
1302 	ts->gpio_hsync = devm_gpiod_get_optional(dev, "ti,hsync", GPIOD_IN);  in ads7846_probe()
1303 	if (IS_ERR(ts->gpio_hsync))  in ads7846_probe()
1304 		return PTR_ERR(ts->gpio_hsync);  in ads7846_probe()
1306 	snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));  in ads7846_probe()
1307 	snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model);  in ads7846_probe()
1309 	input_dev->name = ts->name;  in ads7846_probe()
1310 	input_dev->phys = ts->phys;  in ads7846_probe()
1324 	if (ts->model != 7845)  in ads7846_probe()
1333 	touchscreen_parse_properties(ts->input, false, &ts->core_prop);  in ads7846_probe()
1334 	ts->pressure_max = input_abs_get_max(input_dev, ABS_PRESSURE) ? : ~0;  in ads7846_probe()
1340 	if (!ts->core_prop.swap_x_y && pdata->swap_xy) {  in ads7846_probe()
1342 		ts->core_prop.swap_x_y = true;  in ads7846_probe()
1345 	ads7846_setup_spi_msg(ts, pdata);  in ads7846_probe()
1347 	ts->reg = devm_regulator_get(dev, "vcc");  in ads7846_probe()
1348 	if (IS_ERR(ts->reg)) {  in ads7846_probe()
1349 		err = PTR_ERR(ts->reg);  in ads7846_probe()
1354 	err = regulator_enable(ts->reg);  in ads7846_probe()
1360 	err = devm_add_action_or_reset(dev, ads7846_regulator_disable, ts->reg);  in ads7846_probe()
1369 					irq_flags, dev->driver->name, ts);  in ads7846_probe()
1377 						ts);  in ads7846_probe()
1385 	err = ads784x_hwmon_register(spi, ts);  in ads7846_probe()
1395 	if (ts->model == 7845)  in ads7846_probe()
1418 	struct ads7846 *ts = spi_get_drvdata(spi);  in ads7846_remove()  local
1420 	ads7846_stop(ts);  in ads7846_remove()