1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2010-2011 Pixcir, Inc.
31  * idle: lower scan speed with automatic transition to active on touch
49  * level on touch: interrupt level asserted during touch
50  * pulse on touch: interrupt pulse asserted during touch
65  * struct pixcir_i2c_chip_data - chip related data
99 	u8 touch;  in pixcir_ts_parse()  local
102 	const struct pixcir_i2c_chip_data *chip = tsdata->chip;  in pixcir_ts_parse()
106 	i = chip->has_hw_ids ? 1 : 0;  in pixcir_ts_parse()
107 	readsize = 2 + tsdata->chip->max_fingers * (4 + i);  in pixcir_ts_parse()
111 	ret = i2c_master_send(tsdata->client, wrbuf, sizeof(wrbuf));  in pixcir_ts_parse()
113 		dev_err(&tsdata->client->dev,  in pixcir_ts_parse()
119 	ret = i2c_master_recv(tsdata->client, rdbuf, readsize);  in pixcir_ts_parse()
121 		dev_err(&tsdata->client->dev,  in pixcir_ts_parse()
127 	touch = rdbuf[0] & 0x7;  in pixcir_ts_parse()
128 	if (touch > tsdata->chip->max_fingers)  in pixcir_ts_parse()
129 		touch = tsdata->chip->max_fingers;  in pixcir_ts_parse()
131 	report->num_touches = touch;  in pixcir_ts_parse()
134 	for (i = 0; i < touch; i++) {  in pixcir_ts_parse()
135 		touchscreen_set_mt_pos(&report->pos[i], &tsdata->prop,  in pixcir_ts_parse()
138 		if (chip->has_hw_ids) {  in pixcir_ts_parse()
139 			report->ids[i] = bufptr[4];  in pixcir_ts_parse()
152 	struct device *dev = &ts->client->dev;  in pixcir_ts_report()
153 	const struct pixcir_i2c_chip_data *chip = ts->chip;  in pixcir_ts_report()
155 	n = report->num_touches;  in pixcir_ts_report()
159 	if (!ts->chip->has_hw_ids)  in pixcir_ts_report()
160 		input_mt_assign_slots(ts->input, slots, report->pos, n, 0);  in pixcir_ts_report()
163 		if (chip->has_hw_ids) {  in pixcir_ts_report()
164 			slot = input_mt_get_slot_by_key(ts->input,  in pixcir_ts_report()
165 							report->ids[i]);  in pixcir_ts_report()
168 					report->ids[i]);  in pixcir_ts_report()
175 		input_mt_slot(ts->input, slot);  in pixcir_ts_report()
176 		input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);  in pixcir_ts_report()
178 		input_report_abs(ts->input, ABS_MT_POSITION_X,  in pixcir_ts_report()
179 				 report->pos[i].x);  in pixcir_ts_report()
180 		input_report_abs(ts->input, ABS_MT_POSITION_Y,  in pixcir_ts_report()
181 				 report->pos[i].y);  in pixcir_ts_report()
184 			i, slot, report->pos[i].x, report->pos[i].y);  in pixcir_ts_report()
187 	input_mt_sync_frame(ts->input);  in pixcir_ts_report()
188 	input_sync(ts->input);  in pixcir_ts_report()
196 	while (tsdata->running) {  in pixcir_ts_isr()
203 		if (gpiod_get_value_cansleep(tsdata->gpio_attb)) {  in pixcir_ts_isr()
209 				input_mt_sync_frame(tsdata->input);  in pixcir_ts_isr()
210 				input_sync(tsdata->input);  in pixcir_ts_isr()
223 	if (!IS_ERR_OR_NULL(tsdata->gpio_reset)) {  in pixcir_reset()
224 		gpiod_set_value_cansleep(tsdata->gpio_reset, 1);  in pixcir_reset()
226 		gpiod_set_value_cansleep(tsdata->gpio_reset, 0);  in pixcir_reset()
235 	struct device *dev = &ts->client->dev;  in pixcir_set_power_mode()
239 		if (ts->gpio_wake)  in pixcir_set_power_mode()
240 			gpiod_set_value_cansleep(ts->gpio_wake, 1);  in pixcir_set_power_mode()
243 	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_POWER_MODE);  in pixcir_set_power_mode()
256 	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_POWER_MODE, ret);  in pixcir_set_power_mode()
264 		if (ts->gpio_wake)  in pixcir_set_power_mode()
265 			gpiod_set_value_cansleep(ts->gpio_wake, 0);  in pixcir_set_power_mode()
279 	struct device *dev = &ts->client->dev;  in pixcir_set_int_mode()
282 	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);  in pixcir_set_int_mode()
297 	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);  in pixcir_set_int_mode()
312 	struct device *dev = &ts->client->dev;  in pixcir_int_enable()
315 	ret = i2c_smbus_read_byte_data(ts->client, PIXCIR_REG_INT_MODE);  in pixcir_int_enable()
327 	ret = i2c_smbus_write_byte_data(ts->client, PIXCIR_REG_INT_MODE, ret);  in pixcir_int_enable()
339 	struct device *dev = &ts->client->dev;  in pixcir_start()
342 	if (ts->gpio_enable) {  in pixcir_start()
343 		gpiod_set_value_cansleep(ts->gpio_enable, 1);  in pixcir_start()
354 	ts->running = true;  in pixcir_start()
375 		dev_err(&ts->client->dev,  in pixcir_stop()
382 	ts->running = false;  in pixcir_stop()
386 	synchronize_irq(ts->client->irq);  in pixcir_stop()
388 	if (ts->gpio_enable)  in pixcir_stop()
389 		gpiod_set_value_cansleep(ts->gpio_enable, 0);  in pixcir_stop()
412 	struct input_dev *input = ts->input;  in pixcir_i2c_ts_suspend()
415 	mutex_lock(&input->mutex);  in pixcir_i2c_ts_suspend()
417 	if (device_may_wakeup(&client->dev)) {  in pixcir_i2c_ts_suspend()
430 	mutex_unlock(&input->mutex);  in pixcir_i2c_ts_suspend()
439 	struct input_dev *input = ts->input;  in pixcir_i2c_ts_resume()
442 	mutex_lock(&input->mutex);  in pixcir_i2c_ts_resume()
444 	if (device_may_wakeup(&client->dev)) {  in pixcir_i2c_ts_resume()
457 	mutex_unlock(&input->mutex);  in pixcir_i2c_ts_resume()
468 	struct device *dev = &client->dev;  in pixcir_i2c_ts_probe()
475 		return -ENOMEM;  in pixcir_i2c_ts_probe()
477 	tsdata->chip = device_get_match_data(dev);  in pixcir_i2c_ts_probe()
478 	if (!tsdata->chip && id)  in pixcir_i2c_ts_probe()
479 		tsdata->chip = (const void *)id->driver_data;  in pixcir_i2c_ts_probe()
480 	if (!tsdata->chip) {  in pixcir_i2c_ts_probe()
482 		return -EINVAL;  in pixcir_i2c_ts_probe()
488 		return -ENOMEM;  in pixcir_i2c_ts_probe()
491 	tsdata->client = client;  in pixcir_i2c_ts_probe()
492 	tsdata->input = input;  in pixcir_i2c_ts_probe()
494 	input->name = client->name;  in pixcir_i2c_ts_probe()
495 	input->id.bustype = BUS_I2C;  in pixcir_i2c_ts_probe()
496 	input->open = pixcir_input_open;  in pixcir_i2c_ts_probe()
497 	input->close = pixcir_input_close;  in pixcir_i2c_ts_probe()
501 	touchscreen_parse_properties(input, true, &tsdata->prop);  in pixcir_i2c_ts_probe()
505 		return -EINVAL;  in pixcir_i2c_ts_probe()
508 	error = input_mt_init_slots(input, tsdata->chip->max_fingers,  in pixcir_i2c_ts_probe()
511 		dev_err(dev, "Error initializing Multi-Touch slots\n");  in pixcir_i2c_ts_probe()
517 	tsdata->gpio_attb = devm_gpiod_get(dev, "attb", GPIOD_IN);  in pixcir_i2c_ts_probe()
518 	if (IS_ERR(tsdata->gpio_attb))  in pixcir_i2c_ts_probe()
519 		return dev_err_probe(dev, PTR_ERR(tsdata->gpio_attb),  in pixcir_i2c_ts_probe()
522 	tsdata->gpio_reset = devm_gpiod_get_optional(dev, "reset",  in pixcir_i2c_ts_probe()
524 	if (IS_ERR(tsdata->gpio_reset))  in pixcir_i2c_ts_probe()
525 		return dev_err_probe(dev, PTR_ERR(tsdata->gpio_reset),  in pixcir_i2c_ts_probe()
528 	tsdata->gpio_wake = devm_gpiod_get_optional(dev, "wake",  in pixcir_i2c_ts_probe()
530 	if (IS_ERR(tsdata->gpio_wake))  in pixcir_i2c_ts_probe()
531 		return dev_err_probe(dev, PTR_ERR(tsdata->gpio_wake),  in pixcir_i2c_ts_probe()
534 	tsdata->gpio_enable = devm_gpiod_get_optional(dev, "enable",  in pixcir_i2c_ts_probe()
536 	if (IS_ERR(tsdata->gpio_enable))  in pixcir_i2c_ts_probe()
537 		return dev_err_probe(dev, PTR_ERR(tsdata->gpio_enable),  in pixcir_i2c_ts_probe()
540 	if (tsdata->gpio_enable)  in pixcir_i2c_ts_probe()
543 	error = devm_request_threaded_irq(dev, client->irq, NULL, pixcir_ts_isr,  in pixcir_i2c_ts_probe()
545 					  client->name, tsdata);  in pixcir_i2c_ts_probe()
547 		dev_err(dev, "failed to request irq %d\n", client->irq);  in pixcir_i2c_ts_probe()