1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Driver for	DEC VSXXX-AA mouse (hockey-puck mouse, ball or two rollers)
4  *		DEC VSXXX-GA mouse (rectangular mouse, with ball)
5  *		DEC VSXXX-AB tablet (digitizer with hair cross or stylus)
7  * Copyright (C) 2003-2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
27  * supply at +5V and -12V.
33  *  | 4 --- 3 |
35  *    -------
38  *	1 (GND)		5	7	-
39  *	2 (RxD)		2	3	-
40  *	3 (TxD)		3	2	-
41  *	4 (-12V)	-	-	Somewhere from the PSU. At ATX, it's
44  *					VSXXX-AA/-GA mice.
45  *	5 (+5V)		-	-	PSU (red wires of ATX power connector
48  *	6 (+12V)	-	-	HDD power connector, yellow wire. Only
49  *					required for VSXXX-AB digitizer.
50  *	7 (dev. avail.)	-	-	The mouse shorts this one to pin 1.
57  * -12V to the PSU.
61  * The mice and tablet are described in "VCB02 Video Subsystem - Technical
62  * Manual", DEC EK-104AA-TM-001. You'll find it at MANX, a search engine
64  * http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1
74 #define DRIVER_DESC "Driver for DEC VSXXX-AA and -GA mice and VSXXX-AB tablet"
76 MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
104 #define BUFLEN 15 /* At least 5 is needed for a full tablet packet */
116 	if (num >= mouse->count) {  in vsxxxaa_drop_bytes()
117 		mouse->count = 0;  in vsxxxaa_drop_bytes()
119 		memmove(mouse->buf, mouse->buf + num, BUFLEN - num);  in vsxxxaa_drop_bytes()
120 		mouse->count -= num;  in vsxxxaa_drop_bytes()
126 	if (mouse->count == BUFLEN) {  in vsxxxaa_queue_byte()
128 			mouse->name, mouse->phys);  in vsxxxaa_queue_byte()
134 	mouse->buf[mouse->count++] = byte;  in vsxxxaa_queue_byte()
139 	switch (mouse->type) {  in vsxxxaa_detection_done()
141 		strlcpy(mouse->name, "DEC VSXXX-AA/-GA mouse",  in vsxxxaa_detection_done()
142 			sizeof(mouse->name));  in vsxxxaa_detection_done()
146 		strlcpy(mouse->name, "DEC VSXXX-AB digitizer",  in vsxxxaa_detection_done()
147 			sizeof(mouse->name));  in vsxxxaa_detection_done()
151 		snprintf(mouse->name, sizeof(mouse->name),  in vsxxxaa_detection_done()
153 			 mouse->type);  in vsxxxaa_detection_done()
159 		mouse->name, mouse->version, mouse->country, mouse->phys);  in vsxxxaa_detection_done()
170 	if (!IS_HDR_BYTE(mouse->buf[0])) {  in vsxxxaa_check_packet()
171 		DBG("vsck: len=%d, 1st=0x%02x\n", packet_len, mouse->buf[0]);  in vsxxxaa_check_packet()
177 		if (IS_HDR_BYTE(mouse->buf[i])) {  in vsxxxaa_check_packet()
180 				i - 1);  in vsxxxaa_check_packet()
182 			    packet_len, i, mouse->buf[i]);  in vsxxxaa_check_packet()
183 			return i - 1;  in vsxxxaa_check_packet()
193 	return mouse->count >= len && MATCH_PACKET_TYPE(mouse->buf[0], type);  in vsxxxaa_smells_like_packet()
198 	struct input_dev *dev = mouse->dev;  in vsxxxaa_handle_REL_packet()
199 	unsigned char *buf = mouse->buf;  in vsxxxaa_handle_REL_packet()
217 	dx *= ((buf[0] >> 4) & 0x01) ? 1 : -1;  in vsxxxaa_handle_REL_packet()
224 	dy *= ((buf[0] >> 3) & 0x01) ? -1 : 1;  in vsxxxaa_handle_REL_packet()
237 	    mouse->name, mouse->phys, dx, dy,  in vsxxxaa_handle_REL_packet()
254 	struct input_dev *dev = mouse->dev;  in vsxxxaa_handle_ABS_packet()
255 	unsigned char *buf = mouse->buf;  in vsxxxaa_handle_ABS_packet()
260 	 * Tablet position / button packet  in vsxxxaa_handle_ABS_packet()
270 	 * Get X/Y position. Y axis needs to be inverted since VSXXX-AB  in vsxxxaa_handle_ABS_packet()
271 	 * counts down->top while monitor counts top->bottom.  in vsxxxaa_handle_ABS_packet()
275 	y = 1023 - y;  in vsxxxaa_handle_ABS_packet()
288 	    mouse->name, mouse->phys, x, y,  in vsxxxaa_handle_ABS_packet()
306 	struct input_dev *dev = mouse->dev;  in vsxxxaa_handle_POR_packet()
307 	unsigned char *buf = mouse->buf;  in vsxxxaa_handle_POR_packet()
312 	 * Check for Power-On-Reset packets. These are sent out  in vsxxxaa_handle_POR_packet()
326 	 * D: <0010> == mouse, <0100> == tablet  in vsxxxaa_handle_POR_packet()
329 	mouse->version = buf[0] & 0x0f;  in vsxxxaa_handle_POR_packet()
330 	mouse->country = (buf[1] >> 4) & 0x07;  in vsxxxaa_handle_POR_packet()
331 	mouse->type = buf[1] & 0x0f;  in vsxxxaa_handle_POR_packet()
337 	 * has some meaning if a tablet is attached.  in vsxxxaa_handle_POR_packet()
356 				mouse->name, mouse->phys, error);  in vsxxxaa_handle_POR_packet()
361 	 * If the mouse was hot-plugged, we need to force differential mode  in vsxxxaa_handle_POR_packet()
366 		"incremental streaming mode and 72 samples/sec\n",  in vsxxxaa_handle_POR_packet()
367 		mouse->name, mouse->phys);  in vsxxxaa_handle_POR_packet()
368 	serio_write(mouse->serio, 'S');	/* Standard format */  in vsxxxaa_handle_POR_packet()
370 	serio_write(mouse->serio, 'R');	/* Incremental */  in vsxxxaa_handle_POR_packet()
372 	serio_write(mouse->serio, 'L');	/* 72 samples/sec */  in vsxxxaa_handle_POR_packet()
377 	unsigned char *buf = mouse->buf;  in vsxxxaa_parse_buffer()
391 		while (mouse->count > 0 && !IS_HDR_BYTE(buf[0])) {  in vsxxxaa_parse_buffer()
394 				mouse->name, mouse->phys);  in vsxxxaa_parse_buffer()
452 	input_unregister_device(mouse->dev);  in vsxxxaa_disconnect()
460 	int err = -ENOMEM;  in vsxxxaa_connect()
467 	mouse->dev = input_dev;  in vsxxxaa_connect()
468 	mouse->serio = serio;  in vsxxxaa_connect()
469 	strlcat(mouse->name, "DEC VSXXX-AA/-GA mouse or VSXXX-AB digitizer",  in vsxxxaa_connect()
470 		 sizeof(mouse->name));  in vsxxxaa_connect()
471 	snprintf(mouse->phys, sizeof(mouse->phys), "%s/input0", serio->phys);  in vsxxxaa_connect()
473 	input_dev->name = mouse->name;  in vsxxxaa_connect()
474 	input_dev->phys = mouse->phys;  in vsxxxaa_connect()
475 	input_dev->id.bustype = BUS_RS232;  in vsxxxaa_connect()
476 	input_dev->dev.parent = &serio->dev;  in vsxxxaa_connect()
478 	__set_bit(EV_KEY, input_dev->evbit);		/* We have buttons */  in vsxxxaa_connect()
479 	__set_bit(EV_REL, input_dev->evbit);  in vsxxxaa_connect()
480 	__set_bit(EV_ABS, input_dev->evbit);  in vsxxxaa_connect()
481 	__set_bit(BTN_LEFT, input_dev->keybit);		/* We have 3 buttons */  in vsxxxaa_connect()
482 	__set_bit(BTN_MIDDLE, input_dev->keybit);  in vsxxxaa_connect()
483 	__set_bit(BTN_RIGHT, input_dev->keybit);  in vsxxxaa_connect()
484 	__set_bit(BTN_TOUCH, input_dev->keybit);	/* ...and Tablet */  in vsxxxaa_connect()
485 	__set_bit(REL_X, input_dev->relbit);  in vsxxxaa_connect()
486 	__set_bit(REL_Y, input_dev->relbit);  in vsxxxaa_connect()
498 	 * mode will be requested after the device ID'ed successfully.  in vsxxxaa_connect()