1 // SPDX-License-Identifier: GPL-2.0-only
3  * Fujitsu serial touchscreen driver
16 #define DRIVER_DESC	"Fujitsu serial touchscreen driver"
25  * Per-touchscreen data.
36  * Decode serial data (5 bytes per packet)
47 	struct input_dev *dev = fujitsu->dev;  in fujitsu_interrupt()
49 	if (fujitsu->idx == 0) {  in fujitsu_interrupt()
56 			fujitsu->idx = 0;  in fujitsu_interrupt()
61 	fujitsu->data[fujitsu->idx++] = data;  in fujitsu_interrupt()
62 	if (fujitsu->idx == FUJITSU_LENGTH) {  in fujitsu_interrupt()
64 				 (fujitsu->data[2] << 7) | fujitsu->data[1]);  in fujitsu_interrupt()
66 				 (fujitsu->data[4] << 7) | fujitsu->data[3]);  in fujitsu_interrupt()
68 				 (fujitsu->data[0] & 0x03) != 2);  in fujitsu_interrupt()
70 		fujitsu->idx = 0;  in fujitsu_interrupt()
83 	input_get_device(fujitsu->dev);  in fujitsu_disconnect()
84 	input_unregister_device(fujitsu->dev);  in fujitsu_disconnect()
87 	input_put_device(fujitsu->dev);  in fujitsu_disconnect()
105 		err = -ENOMEM;  in fujitsu_connect()
109 	fujitsu->serio = serio;  in fujitsu_connect()
110 	fujitsu->dev = input_dev;  in fujitsu_connect()
111 	snprintf(fujitsu->phys, sizeof(fujitsu->phys),  in fujitsu_connect()
112 		 "%s/input0", serio->phys);  in fujitsu_connect()
114 	input_dev->name = "Fujitsu Serial Touchscreen";  in fujitsu_connect()
115 	input_dev->phys = fujitsu->phys;  in fujitsu_connect()
116 	input_dev->id.bustype = BUS_RS232;  in fujitsu_connect()
117 	input_dev->id.vendor = SERIO_FUJITSU;  in fujitsu_connect()
118 	input_dev->id.product = 0;  in fujitsu_connect()
119 	input_dev->id.version = 0x0100;  in fujitsu_connect()
120 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);  in fujitsu_connect()
121 	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);  in fujitsu_connect()
131 	err = input_register_device(fujitsu->dev);  in fujitsu_connect()
154 		.id	= SERIO_ANY,