1#ifndef _LIBPS2_H
2#define _LIBPS2_H
3
4/*
5 * Copyright (C) 1999-2002 Vojtech Pavlik
6 * Copyright (C) 2004 Dmitry Torokhov
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 */
12
13
14#define PS2_CMD_GETID		0x02f2
15#define PS2_CMD_RESET_BAT	0x02ff
16
17#define PS2_RET_BAT		0xaa
18#define PS2_RET_ID		0x00
19#define PS2_RET_ACK		0xfa
20#define PS2_RET_NAK		0xfe
21
22#define PS2_FLAG_ACK		1	/* Waiting for ACK/NAK */
23#define PS2_FLAG_CMD		2	/* Waiting for command to finish */
24#define PS2_FLAG_CMD1		4	/* Waiting for the first byte of command response */
25#define PS2_FLAG_WAITID		8	/* Command execiting is GET ID */
26
27struct ps2dev {
28	struct serio *serio;
29
30	/* Ensures that only one command is executing at a time */
31	struct mutex cmd_mutex;
32
33	/* Used to signal completion from interrupt handler */
34	wait_queue_head_t wait;
35
36	unsigned long flags;
37	unsigned char cmdbuf[6];
38	unsigned char cmdcnt;
39	unsigned char nak;
40};
41
42void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
43int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
44void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
45int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
46int ps2_schedule_command(struct ps2dev *ps2dev, unsigned char *param, int command);
47int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
48int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
49void ps2_cmd_aborted(struct ps2dev *ps2dev);
50int ps2_is_keyboard_id(char id);
51
52#endif /* _LIBPS2_H */
53