1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for Motorola PCAP2 touchscreen as found in the EZX phone platform.
18 #include <linux/mfd/ezx-pcap.h>
42 	switch (pcap_ts->read_state) {  in pcap_ts_read_xy()
46 			pcap_ts->pressure = res[0];  in pcap_ts_read_xy()
47 		pcap_ts->read_state = PCAP_ADC_TS_M_XY;  in pcap_ts_read_xy()
48 		schedule_delayed_work(&pcap_ts->work, 0);  in pcap_ts_read_xy()
51 		pcap_ts->y = res[0];  in pcap_ts_read_xy()
52 		pcap_ts->x = res[1];  in pcap_ts_read_xy()
53 		if (pcap_ts->x <= X_AXIS_MIN || pcap_ts->x >= X_AXIS_MAX ||  in pcap_ts_read_xy()
54 		    pcap_ts->y <= Y_AXIS_MIN || pcap_ts->y >= Y_AXIS_MAX) {  in pcap_ts_read_xy()
55 			/* pen has been released */  in pcap_ts_read_xy()
56 			input_report_abs(pcap_ts->input, ABS_PRESSURE, 0);  in pcap_ts_read_xy()
57 			input_report_key(pcap_ts->input, BTN_TOUCH, 0);  in pcap_ts_read_xy()
59 			pcap_ts->read_state = PCAP_ADC_TS_M_STANDBY;  in pcap_ts_read_xy()
60 			schedule_delayed_work(&pcap_ts->work, 0);  in pcap_ts_read_xy()
63 			input_report_abs(pcap_ts->input, ABS_X, pcap_ts->x);  in pcap_ts_read_xy()
64 			input_report_abs(pcap_ts->input, ABS_Y, pcap_ts->y);  in pcap_ts_read_xy()
65 			input_report_key(pcap_ts->input, BTN_TOUCH, 1);  in pcap_ts_read_xy()
66 			input_report_abs(pcap_ts->input, ABS_PRESSURE,  in pcap_ts_read_xy()
67 						pcap_ts->pressure);  in pcap_ts_read_xy()
70 			pcap_ts->read_state = PCAP_ADC_TS_M_PRESSURE;  in pcap_ts_read_xy()
71 			schedule_delayed_work(&pcap_ts->work,  in pcap_ts_read_xy()
74 		input_sync(pcap_ts->input);  in pcap_ts_read_xy()
77 		dev_warn(&pcap_ts->input->dev,  in pcap_ts_read_xy()
79 				pcap_ts->read_state);  in pcap_ts_read_xy()
90 	pcap_set_ts_bits(pcap_ts->pcap,  in pcap_ts_work()
91 			pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);  in pcap_ts_work()
93 	if (pcap_ts->read_state == PCAP_ADC_TS_M_STANDBY)  in pcap_ts_work()
99 	pcap_adc_async(pcap_ts->pcap, PCAP_ADC_BANK_1, 0, ch,  in pcap_ts_work()
107 	if (pcap_ts->read_state == PCAP_ADC_TS_M_STANDBY) {  in pcap_ts_event_touch()
108 		pcap_ts->read_state = PCAP_ADC_TS_M_PRESSURE;  in pcap_ts_event_touch()
109 		schedule_delayed_work(&pcap_ts->work, 0);  in pcap_ts_event_touch()
118 	pcap_ts->read_state = PCAP_ADC_TS_M_STANDBY;  in pcap_ts_open()
119 	schedule_delayed_work(&pcap_ts->work, 0);  in pcap_ts_open()
128 	cancel_delayed_work_sync(&pcap_ts->work);  in pcap_ts_close()
130 	pcap_ts->read_state = PCAP_ADC_TS_M_NONTS;  in pcap_ts_close()
131 	pcap_set_ts_bits(pcap_ts->pcap,  in pcap_ts_close()
132 				pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);  in pcap_ts_close()
139 	int err = -ENOMEM;  in pcap_ts_probe()
145 	pcap_ts->pcap = dev_get_drvdata(pdev->dev.parent);  in pcap_ts_probe()
152 	INIT_DELAYED_WORK(&pcap_ts->work, pcap_ts_work);  in pcap_ts_probe()
154 	pcap_ts->read_state = PCAP_ADC_TS_M_NONTS;  in pcap_ts_probe()
155 	pcap_set_ts_bits(pcap_ts->pcap,  in pcap_ts_probe()
156 				pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);  in pcap_ts_probe()
158 	pcap_ts->input = input_dev;  in pcap_ts_probe()
161 	input_dev->name = "pcap-touchscreen";  in pcap_ts_probe()
162 	input_dev->phys = "pcap_ts/input0";  in pcap_ts_probe()
163 	input_dev->id.bustype = BUS_HOST;  in pcap_ts_probe()
164 	input_dev->id.vendor = 0x0001;  in pcap_ts_probe()
165 	input_dev->id.product = 0x0002;  in pcap_ts_probe()
166 	input_dev->id.version = 0x0100;  in pcap_ts_probe()
167 	input_dev->dev.parent = &pdev->dev;  in pcap_ts_probe()
168 	input_dev->open = pcap_ts_open;  in pcap_ts_probe()
169 	input_dev->close = pcap_ts_close;  in pcap_ts_probe()
171 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);  in pcap_ts_probe()
172 	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);  in pcap_ts_probe()
178 	err = input_register_device(pcap_ts->input);  in pcap_ts_probe()
182 	err = request_irq(pcap_to_irq(pcap_ts->pcap, PCAP_IRQ_TS),  in pcap_ts_probe()
204 	free_irq(pcap_to_irq(pcap_ts->pcap, PCAP_IRQ_TS), pcap_ts);  in pcap_ts_remove()
205 	cancel_delayed_work_sync(&pcap_ts->work);  in pcap_ts_remove()
207 	input_unregister_device(pcap_ts->input);  in pcap_ts_remove()
219 	pcap_set_ts_bits(pcap_ts->pcap, PCAP_ADC_TS_REF_LOWPWR);  in pcap_ts_suspend()
227 	pcap_set_ts_bits(pcap_ts->pcap,  in pcap_ts_resume()
228 				pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);  in pcap_ts_resume()
245 		.name	= "pcap-ts",
251 MODULE_DESCRIPTION("Motorola PCAP2 touchscreen driver");