1 // SPDX-License-Identifier: GPL-2.0+
3  * Driver for ChipOne icn8505 i2c touchscreen controller
5  * Copyright (c) 2015-2018 Red Hat Inc.
20 #include <linux/input/touchscreen.h>
53 	u8 pressure;	/* Seems more like finger width then pressure really */  member
97 		buf[i] = (reg_addr >> (reg_addr_width - (i + 1) * 8)) & 0xff;  in icn8505_read_xfer()
99 	ret = i2c_transfer(client->adapter, msg, 2);  in icn8505_read_xfer()
102 			ret = -EIO;  in icn8505_read_xfer()
104 			dev_err(&client->dev,  in icn8505_read_xfer()
117 	u8 buf[3 + 32]; /* 3 bytes for 24 bit reg-addr + 32 bytes max len */  in icn8505_write_xfer()
126 		return -EINVAL;  in icn8505_write_xfer()
129 		buf[i] = (reg_addr >> (reg_addr_width - (i + 1) * 8)) & 0xff;  in icn8505_write_xfer()
133 	ret = i2c_transfer(client->adapter, &msg, 1);  in icn8505_write_xfer()
136 			ret = -EIO;  in icn8505_write_xfer()
138 			dev_err(&client->dev,  in icn8505_write_xfer()
150 	return icn8505_read_xfer(icn8505->client, icn8505->client->addr, reg,  in icn8505_read_data()
159 	error = icn8505_read_xfer(icn8505->client, icn8505->client->addr, reg,  in icn8505_read_reg_silent()
169 	return icn8505_write_xfer(icn8505->client, icn8505->client->addr, reg,  in icn8505_write_reg()
176 	return icn8505_read_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,  in icn8505_read_prog_data()
183 	return icn8505_write_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,  in icn8505_write_prog_data()
189 	return icn8505_write_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,  in icn8505_write_prog_reg()
202 	struct device *dev = &icn8505->client->dev;  in icn8505_try_fw_upload()
227 		return -ENODEV;  in icn8505_try_fw_upload()
238 	for (offset = 0; offset < fw->size; offset += count) {  in icn8505_try_fw_upload()
239 		count = min_t(size_t, fw->size - offset, 32);  in icn8505_try_fw_upload()
241 					      fw->data + offset, count);  in icn8505_try_fw_upload()
256 	if (get_unaligned_le16(buf) != fw->size) {  in icn8505_try_fw_upload()
258 		return -EIO;  in icn8505_try_fw_upload()
265 	crc = crc32_be(0, fw->data, fw->size);  in icn8505_try_fw_upload()
268 		return -EIO;  in icn8505_try_fw_upload()
282 	struct device *dev = &icn8505->client->dev;  in icn8505_upload_fw()
291 	error = firmware_request_platform(&fw, icn8505->firmware_name, dev);  in icn8505_upload_fw()
325 	struct device *dev = &icn8505->client->dev;  in icn8505_irq()
344 		bool act = icn8505_touch_active(touch->event);  in icn8505_irq()
346 		input_mt_slot(icn8505->input, touch->slot);  in icn8505_irq()
347 		input_mt_report_slot_state(icn8505->input, MT_TOOL_FINGER, act);  in icn8505_irq()
351 		touchscreen_report_pos(icn8505->input, &icn8505->prop,  in icn8505_irq()
352 				       get_unaligned_le16(touch->x),  in icn8505_irq()
353 				       get_unaligned_le16(touch->y),  in icn8505_irq()
357 	input_mt_sync_frame(icn8505->input);  in icn8505_irq()
358 	input_report_key(icn8505->input, KEY_LEFTMETA,  in icn8505_irq()
360 	input_sync(icn8505->input);  in icn8505_irq()
375 		return -ENODEV;  in icn8505_probe_acpi()
377 	status = acpi_evaluate_object(adev->handle, "_SUB", NULL, &buffer);  in icn8505_probe_acpi()
380 		if (obj->type == ACPI_TYPE_STRING)  in icn8505_probe_acpi()
381 			subsys = obj->string.pointer;  in icn8505_probe_acpi()
389 	snprintf(icn8505->firmware_name, sizeof(icn8505->firmware_name),  in icn8505_probe_acpi()
390 		 "chipone/icn8505-%s.fw", subsys);  in icn8505_probe_acpi()
398 	struct device *dev = &client->dev;  in icn8505_probe()
404 	if (!client->irq) {  in icn8505_probe()
406 		return -EINVAL;  in icn8505_probe()
411 		return -ENOMEM;  in icn8505_probe()
415 		return -ENOMEM;  in icn8505_probe()
417 	input->name = client->name;  in icn8505_probe()
418 	input->id.bustype = BUS_I2C;  in icn8505_probe()
424 	icn8505->client = client;  in icn8505_probe()
425 	icn8505->input = input;  in icn8505_probe()
444 			     le16_to_cpu(resolution[0]) - 1, 0, 0);  in icn8505_probe()
446 			     le16_to_cpu(resolution[1]) - 1, 0, 0);  in icn8505_probe()
448 	touchscreen_parse_properties(input, true, &icn8505->prop);  in icn8505_probe()
451 		dev_err(dev, "Error touchscreen-size-x and/or -y missing\n");  in icn8505_probe()
452 		return -EINVAL;  in icn8505_probe()
460 	error = devm_request_threaded_irq(dev, client->irq, NULL, icn8505_irq,  in icn8505_probe()
461 					IRQF_ONESHOT, client->name, icn8505);  in icn8505_probe()
479 	disable_irq(icn8505->client->irq);  in icn8505_suspend()
495 	enable_irq(icn8505->client->irq);  in icn8505_resume()
518 MODULE_DESCRIPTION("ChipOne icn8505 I2C Touchscreen Driver");