async: make sure independent async domains can't accidentally entangle
[linux-2.6/mini2440.git] / include / linux / libps2.h
blobb94534b7e26658b805978e153339378c847575e8
1 #ifndef _LIBPS2_H
2 #define _LIBPS2_H
4 /*
5 * Copyright (C) 1999-2002 Vojtech Pavlik
6 * Copyright (C) 2004 Dmitry Torokhov
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.
14 #define PS2_CMD_GETID 0x02f2
15 #define PS2_CMD_RESET_BAT 0x02ff
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 #define PS2_RET_ERR 0xfc
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 */
27 #define PS2_FLAG_NAK 16 /* Last transmission was NAKed */
29 struct ps2dev {
30 struct serio *serio;
32 /* Ensures that only one command is executing at a time */
33 struct mutex cmd_mutex;
35 /* Used to signal completion from interrupt handler */
36 wait_queue_head_t wait;
38 unsigned long flags;
39 unsigned char cmdbuf[6];
40 unsigned char cmdcnt;
41 unsigned char nak;
44 void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
45 int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
46 void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
47 int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
48 int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
49 int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
50 void ps2_cmd_aborted(struct ps2dev *ps2dev);
51 int ps2_is_keyboard_id(char id);
53 #endif /* _LIBPS2_H */