1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for Cypress CY8CTMA140 (TMA140) touchscreen
8  * Inspired by the tma140_skomer.c driver in the Samsung GT-S7710 code
9  * drop. The GT-S7710 is codenamed "Skomer", the code also indicates
10  * that the same touchscreen was used in a product called "Lucas".
12  * The code drop for GT-S7710 also contains a firmware downloader and
14  * the firmware got downloaded to the touchscreen flash successfully and
23 #include <linux/input/touchscreen.h>
73 		id = i % 2 ? buf[-1] & 0x0f : buf[5] >> 4;  in cy8ctma140_report()
74 		slot = input_mt_get_slot_by_key(ts->input, id);  in cy8ctma140_report()
82 		dev_dbg(ts->dev, "finger %d: ID %02x (%d, %d) w: %d\n",  in cy8ctma140_report()
85 		input_mt_slot(ts->input, slot);  in cy8ctma140_report()
86 		input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);  in cy8ctma140_report()
87 		touchscreen_report_pos(ts->input, &ts->props, x, y, true);  in cy8ctma140_report()
88 		input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, w);  in cy8ctma140_report()
91 	input_mt_sync_frame(ts->input);  in cy8ctma140_report()
92 	input_sync(ts->input);  in cy8ctma140_report()
102 			.addr = ts->client->addr,  in cy8ctma140_irq_thread()
107 			.addr = ts->client->addr,  in cy8ctma140_irq_thread()
116 	ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));  in cy8ctma140_irq_thread()
119 			dev_err(ts->dev, "error reading message: %d\n", ret);  in cy8ctma140_irq_thread()
121 			dev_err(ts->dev, "wrong number of messages\n");  in cy8ctma140_irq_thread()
126 		dev_dbg(ts->dev, "invalid event\n");  in cy8ctma140_irq_thread()
132 		dev_err(ts->dev, "unexpected number of fingers: %d\n",  in cy8ctma140_irq_thread()
150 	ret = i2c_master_send(ts->client, addr, 1);  in cy8ctma140_init()
152 		dev_err(ts->dev, "error sending FW info message\n");  in cy8ctma140_init()
155 	ret = i2c_master_recv(ts->client, buf, 5);  in cy8ctma140_init()
157 		dev_err(ts->dev, "error receiving FW info message\n");  in cy8ctma140_init()
161 		dev_err(ts->dev, "got only %d bytes\n", ret);  in cy8ctma140_init()
162 		return -EIO;  in cy8ctma140_init()
165 	dev_dbg(ts->dev, "vendor %c%c, HW ID %.2d, FW ver %.4d\n",  in cy8ctma140_init()
175 	error = regulator_bulk_enable(ARRAY_SIZE(ts->regulators),  in cy8ctma140_power_up()
176 				      ts->regulators);  in cy8ctma140_power_up()
178 		dev_err(ts->dev, "failed to enable regulators\n");  in cy8ctma140_power_up()
189 	regulator_bulk_disable(ARRAY_SIZE(ts->regulators),  in cy8ctma140_power_down()
190 			       ts->regulators);  in cy8ctma140_power_down()
206 	struct device *dev = &client->dev;  in cy8ctma140_probe()
211 		return -ENOMEM;  in cy8ctma140_probe()
215 		return -ENOMEM;  in cy8ctma140_probe()
217 	ts->dev = dev;  in cy8ctma140_probe()
218 	ts->client = client;  in cy8ctma140_probe()
219 	ts->input = input;  in cy8ctma140_probe()
226 	 * This sets up event max/min capabilities and fuzz.  in cy8ctma140_probe()
228 	 * to provide defaults for X/Y max or pressure max.  in cy8ctma140_probe()
230 	 * We just initialize a very simple MT touchscreen here,  in cy8ctma140_probe()
231 	 * some devices use the capability of this touchscreen to  in cy8ctma140_probe()
238 	touchscreen_parse_properties(input, true, &ts->props);  in cy8ctma140_probe()
247 	input->name = CY8CTMA140_NAME;  in cy8ctma140_probe()
248 	input->id.bustype = BUS_I2C;  in cy8ctma140_probe()
258 	ts->regulators[0].supply = "vcpin";  in cy8ctma140_probe()
259 	ts->regulators[1].supply = "vdd";  in cy8ctma140_probe()
260 	error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->regulators),  in cy8ctma140_probe()
261 				      ts->regulators);  in cy8ctma140_probe()
263 		if (error != -EPROBE_DEFER)  in cy8ctma140_probe()
279 	error = devm_request_threaded_irq(dev, client->irq,  in cy8ctma140_probe()
283 		dev_err(dev, "irq %d busy? error %d\n", client->irq, error);  in cy8ctma140_probe()
305 	if (!device_may_wakeup(&client->dev))  in cy8ctma140_suspend()
317 	if (!device_may_wakeup(&client->dev)) {  in cy8ctma140_resume()
352 MODULE_DESCRIPTION("CY8CTMA140 TouchScreen Driver");