1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/i2c.h>
37  * BU21023GUL/BU21023MUV/BU21024FV-M registers map
270  * rohm_i2c_burst_read - execute combined I2C message for ROHM BU21023/24
285 	struct i2c_adapter *adap = client->adapter;  in rohm_i2c_burst_read()
289 	msg[0].addr = client->addr;  in rohm_i2c_burst_read()
294 	msg[1].addr = client->addr;  in rohm_i2c_burst_read()
303 			ret = -EIO;  in rohm_i2c_burst_read()
315 	struct i2c_client *client = ts->client;  in rohm_ts_manual_calibration()
316 	struct device *dev = &client->dev;  in rohm_ts_manual_calibration()
317 	u8 buf[33];	/* for PRM1_X_H(0x08)-TOUCH(0x28) */  in rohm_ts_manual_calibration()
319 	int retry;  in rohm_ts_manual_calibration()  local
358 	for (retry = 0; retry < CALIBRATION_RETRY_MAX; retry++) {  in rohm_ts_manual_calibration()
362 #define READ_CALIB_BUF(reg)	buf[((reg) - PRM1_X_H)]  in rohm_ts_manual_calibration()
374 				READ_CALIB_BUF(PRM1_X_L)) - AXIS_OFFSET;  in rohm_ts_manual_calibration()
376 				READ_CALIB_BUF(PRM1_Y_L)) - AXIS_OFFSET;  in rohm_ts_manual_calibration()
393 				calib_x -= AXIS_ADJUST;  in rohm_ts_manual_calibration()
399 				calib_y -= AXIS_ADJUST;  in rohm_ts_manual_calibration()
504 		error = -EBUSY;  in rohm_ts_manual_calibration()
523 	struct i2c_client *client = ts->client;  in rohm_ts_soft_irq()
524 	struct input_dev *input_dev = ts->input;  in rohm_ts_soft_irq()
525 	struct device *dev = &client->dev;  in rohm_ts_soft_irq()
527 	u8 buf[10];	/* for POS_X1_H(0x20)-TOUCH_GESTURE(0x29) */  in rohm_ts_soft_irq()
533 	int finger_count = -1;  in rohm_ts_soft_irq()
534 	int prev_finger_count = ts->finger_count;  in rohm_ts_soft_irq()
535 	int count;  in rohm_ts_soft_irq()  local
548 #define READ_POS_BUF(reg)	buf[((reg) - POS_X1_H)]  in rohm_ts_soft_irq()
570 		if (++ts->contact_count[0] >= threshold)  in rohm_ts_soft_irq()
576 		if (++ts->contact_count[1] >= threshold)  in rohm_ts_soft_irq()
591 		if (++ts->contact_count[2] >= threshold)  in rohm_ts_soft_irq()
603 			count = ts->contact_count[finger_count];  in rohm_ts_soft_irq()
604 			memset(ts->contact_count, 0, sizeof(ts->contact_count));  in rohm_ts_soft_irq()
605 			ts->contact_count[finger_count] = count;  in rohm_ts_soft_irq()
625 		ts->finger_count = finger_count;  in rohm_ts_soft_irq()
645 	struct device *dev = &client->dev;  in rohm_ts_load_firmware()
649 	unsigned int retry = 0;  in rohm_ts_load_firmware()  local
666 		if (retry) {  in rohm_ts_load_firmware()
669 			/* settings for retry */  in rohm_ts_load_firmware()
690 		len = fw->size;  in rohm_ts_load_firmware()
696 						xfer_len, &fw->data[offset]);  in rohm_ts_load_firmware()
700 			len -= xfer_len;  in rohm_ts_load_firmware()
719 		error = -EIO;  in rohm_ts_load_firmware()
720 	} while (++retry <= FIRMWARE_RETRY_MAX);  in rohm_ts_load_firmware()
736 	return sprintf(buf, "%d\n", !!(ts->setup2 & SWAP_XY));  in swap_xy_show()
740 			     const char *buf, size_t count)  in swap_xy_store()  argument
751 	error = mutex_lock_interruptible(&ts->input->mutex);  in swap_xy_store()
756 		ts->setup2 |= SWAP_XY;  in swap_xy_store()
758 		ts->setup2 &= ~SWAP_XY;  in swap_xy_store()
760 	if (ts->initialized)  in swap_xy_store()
761 		error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2,  in swap_xy_store()
762 						  ts->setup2);  in swap_xy_store()
764 	mutex_unlock(&ts->input->mutex);  in swap_xy_store()
766 	return error ? error : count;  in swap_xy_store()
775 	return sprintf(buf, "%d\n", !!(ts->setup2 & INV_X));  in inv_x_show()
779 			   const char *buf, size_t count)  in inv_x_store()  argument
790 	error = mutex_lock_interruptible(&ts->input->mutex);  in inv_x_store()
795 		ts->setup2 |= INV_X;  in inv_x_store()
797 		ts->setup2 &= ~INV_X;  in inv_x_store()
799 	if (ts->initialized)  in inv_x_store()
800 		error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2,  in inv_x_store()
801 						  ts->setup2);  in inv_x_store()
803 	mutex_unlock(&ts->input->mutex);  in inv_x_store()
805 	return error ? error : count;  in inv_x_store()
814 	return sprintf(buf, "%d\n", !!(ts->setup2 & INV_Y));  in inv_y_show()
818 			   const char *buf, size_t count)  in inv_y_store()  argument
829 	error = mutex_lock_interruptible(&ts->input->mutex);  in inv_y_store()
834 		ts->setup2 |= INV_Y;  in inv_y_store()
836 		ts->setup2 &= ~INV_Y;  in inv_y_store()
838 	if (ts->initialized)  in inv_y_store()
840 						  ts->setup2);  in inv_y_store()
842 	mutex_unlock(&ts->input->mutex);  in inv_y_store()
844 	return error ? error : count;  in inv_y_store()
864 	struct device *dev = &client->dev;  in rohm_ts_device_init()
867 	disable_irq(client->irq);  in rohm_ts_device_init()
880 	/* Waiting for the analog warm-up, max. 200usec */  in rohm_ts_device_init()
1043 	enable_irq(client->irq);  in rohm_ts_device_init()
1055 		dev_err(&client->dev,  in rohm_ts_power_off()
1063 		dev_err(&client->dev,  in rohm_ts_power_off()
1072 	struct i2c_client *client = ts->client;  in rohm_ts_open()
1075 	if (!ts->initialized) {  in rohm_ts_open()
1076 		error = rohm_ts_device_init(client, ts->setup2);  in rohm_ts_open()
1078 			dev_err(&client->dev,  in rohm_ts_open()
1083 		ts->initialized = true;  in rohm_ts_open()
1093 	rohm_ts_power_off(ts->client);  in rohm_ts_close()
1095 	ts->initialized = false;  in rohm_ts_close()
1101 	struct device *dev = &client->dev;  in rohm_bu21023_i2c_probe()
1106 	if (!client->irq) {  in rohm_bu21023_i2c_probe()
1108 		return -EINVAL;  in rohm_bu21023_i2c_probe()
1111 	if (!client->adapter->algo->master_xfer) {  in rohm_bu21023_i2c_probe()
1112 		dev_err(dev, "I2C level transfers not supported\n");  in rohm_bu21023_i2c_probe()
1113 		return -EOPNOTSUPP;  in rohm_bu21023_i2c_probe()
1123 		return -ENOMEM;  in rohm_bu21023_i2c_probe()
1125 	ts->client = client;  in rohm_bu21023_i2c_probe()
1126 	ts->setup2 = MAF_1SAMPLE;  in rohm_bu21023_i2c_probe()
1131 		return -ENOMEM;  in rohm_bu21023_i2c_probe()
1133 	input->name = BU21023_NAME;  in rohm_bu21023_i2c_probe()
1134 	input->id.bustype = BUS_I2C;  in rohm_bu21023_i2c_probe()
1135 	input->open = rohm_ts_open;  in rohm_bu21023_i2c_probe()
1136 	input->close = rohm_ts_close;  in rohm_bu21023_i2c_probe()
1138 	ts->input = input;  in rohm_bu21023_i2c_probe()
1154 	error = devm_request_threaded_irq(dev, client->irq,  in rohm_bu21023_i2c_probe()
1156 					  IRQF_ONESHOT, client->name, ts);  in rohm_bu21023_i2c_probe()
1181 MODULE_DEVICE_TABLE(i2c, rohm_bu21023_i2c_id);