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.
13 #include <linux/mutex.h>
14 #include <linux/types.h>
15 #include <linux/wait.h>
17 #define PS2_CMD_GETID 0x02f2
18 #define PS2_CMD_RESET_BAT 0x02ff
20 #define PS2_RET_BAT 0xaa
21 #define PS2_RET_ID 0x00
22 #define PS2_RET_ACK 0xfa
23 #define PS2_RET_NAK 0xfe
24 #define PS2_RET_ERR 0xfc
26 #define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */
27 #define PS2_FLAG_CMD 2 /* Waiting for command to finish */
28 #define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */
29 #define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */
30 #define PS2_FLAG_NAK 16 /* Last transmission was NAKed */
35 /* Ensures that only one command is executing at a time */
36 struct mutex cmd_mutex;
38 /* Used to signal completion from interrupt handler */
39 wait_queue_head_t wait;
47 void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
48 int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout);
49 void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout);
50 void ps2_begin_command(struct ps2dev *ps2dev);
51 void ps2_end_command(struct ps2dev *ps2dev);
52 int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
53 int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
54 bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data);
55 bool ps2_handle_response(struct ps2dev *ps2dev, u8 data);
56 void ps2_cmd_aborted(struct ps2dev *ps2dev);
57 bool ps2_is_keyboard_id(u8 id);
59 #endif /* _LIBPS2_H */