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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
Dmitry Torokhova2d781f2008-11-19 17:02:24 -050021#define PS2_RET_ERR 0xfc
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */
24#define PS2_FLAG_CMD 2 /* Waiting for command to finish */
25#define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */
26#define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */
Dmitry Torokhova2d781f2008-11-19 17:02:24 -050027#define PS2_FLAG_NAK 16 /* Last transmission was NAKed */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29struct ps2dev {
30 struct serio *serio;
31
32 /* Ensures that only one command is executing at a time */
Arjan van de Venc4e32e92006-02-19 00:21:55 -050033 struct mutex cmd_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
35 /* Used to signal completion from interrupt handler */
36 wait_queue_head_t wait;
37
38 unsigned long flags;
39 unsigned char cmdbuf[6];
40 unsigned char cmdcnt;
41 unsigned char nak;
42};
43
44void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
45int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
Dmitry Torokhovc6117632005-06-01 02:39:51 -050046void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
49int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
50void ps2_cmd_aborted(struct ps2dev *ps2dev);
Dmitry Torokhov98078792006-09-14 01:31:27 -040051int ps2_is_keyboard_id(char id);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53#endif /* _LIBPS2_H */