input/serio/parkbd.c

1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (c) 1999-2004 Vojtech Pavlik
15  *     +5V --------------------- +5V (4)
18  *     +5V -------|______|--.
20  *     ACK (10) ------------|
21  *                          |--- KBD CLOCK (5)
22  *     STROBE (1) ---|<|----'
25  *     +5V -------|______|--.
27  *     BUSY (11) -----------|
28  *                          |--- KBD DATA (1)
29  *     AUTOFD (14) --|<|----'
31  *     GND (18-25) ------------- GND (3)
38  * or from a joystick port. Unfortunately, the parallel port of a PC doesn't
61 #define PARKBD_CLOCK	0x01	/* Strobe & Ack */
75 	return (parport_read_status(parkbd_dev->port) >> 6) ^ 2;  in parkbd_readlines()
80 	parport_write_control(parkbd_dev->port, (~data & 3) | 0x10);  in parkbd_writelines()
87 	if (!parkbd_mode) return -1;  in parkbd_write()
134 			serio_interrupt(parkbd_port, (parkbd_buffer >> (2 - parkbd_mode)) & 0xff, 0);  in parkbd_interrupt()
152 		return -ENODEV;  in parkbd_getport()
156 		return -EBUSY;  in parkbd_getport()
170 		serio->id.type = parkbd_mode;  in parkbd_allocate_serio()
171 		serio->write = parkbd_write;  in parkbd_allocate_serio()
172 		strscpy(serio->name, "PARKBD AT/XT keyboard adapter", sizeof(serio->name));  in parkbd_allocate_serio()
173 		snprintf(serio->phys, sizeof(serio->phys), "%s/serio0", parkbd_dev->port->name);  in parkbd_allocate_serio()
181 	if (pp->number != parkbd_pp_no) {  in parkbd_attach()
182 		pr_debug("Not using parport%d.\n", pp->number);  in parkbd_attach()
201                         parkbd_mode ? "AT" : "XT", parkbd_dev->port->name);  in parkbd_attach()
208 	if (!parkbd_port || port->number != parkbd_pp_no)  in parkbd_detach()