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1da177e4 LT |
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 | ||
3a92dd33 | 13 | #include <linux/bitops.h> |
b28bad65 DT |
14 | #include <linux/mutex.h> |
15 | #include <linux/types.h> | |
16 | #include <linux/wait.h> | |
1da177e4 | 17 | |
08be954b DT |
18 | #define PS2_CMD_SETSCALE11 0x00e6 |
19 | #define PS2_CMD_SETRES 0x10e8 | |
1da177e4 LT |
20 | #define PS2_CMD_GETID 0x02f2 |
21 | #define PS2_CMD_RESET_BAT 0x02ff | |
22 | ||
23 | #define PS2_RET_BAT 0xaa | |
24 | #define PS2_RET_ID 0x00 | |
25 | #define PS2_RET_ACK 0xfa | |
26 | #define PS2_RET_NAK 0xfe | |
a2d781fc | 27 | #define PS2_RET_ERR 0xfc |
1da177e4 | 28 | |
3a92dd33 DT |
29 | #define PS2_FLAG_ACK BIT(0) /* Waiting for ACK/NAK */ |
30 | #define PS2_FLAG_CMD BIT(1) /* Waiting for a command to finish */ | |
31 | #define PS2_FLAG_CMD1 BIT(2) /* Waiting for the first byte of command response */ | |
32 | #define PS2_FLAG_WAITID BIT(3) /* Command executing is GET ID */ | |
33 | #define PS2_FLAG_NAK BIT(4) /* Last transmission was NAKed */ | |
29acc42e | 34 | #define PS2_FLAG_ACK_CMD BIT(5) /* Waiting to ACK the command (first) byte */ |
1da177e4 LT |
35 | |
36 | struct ps2dev { | |
37 | struct serio *serio; | |
38 | ||
39 | /* Ensures that only one command is executing at a time */ | |
c4e32e9f | 40 | struct mutex cmd_mutex; |
1da177e4 LT |
41 | |
42 | /* Used to signal completion from interrupt handler */ | |
43 | wait_queue_head_t wait; | |
44 | ||
45 | unsigned long flags; | |
b28bad65 DT |
46 | u8 cmdbuf[8]; |
47 | u8 cmdcnt; | |
48 | u8 nak; | |
1da177e4 LT |
49 | }; |
50 | ||
51 | void ps2_init(struct ps2dev *ps2dev, struct serio *serio); | |
b28bad65 DT |
52 | int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout); |
53 | void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout); | |
181d683d DT |
54 | void ps2_begin_command(struct ps2dev *ps2dev); |
55 | void ps2_end_command(struct ps2dev *ps2dev); | |
b28bad65 DT |
56 | int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); |
57 | int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); | |
08be954b | 58 | int ps2_sliced_command(struct ps2dev *ps2dev, u8 command); |
b28bad65 DT |
59 | bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data); |
60 | bool ps2_handle_response(struct ps2dev *ps2dev, u8 data); | |
1da177e4 | 61 | void ps2_cmd_aborted(struct ps2dev *ps2dev); |
b28bad65 | 62 | bool ps2_is_keyboard_id(u8 id); |
1da177e4 LT |
63 | |
64 | #endif /* _LIBPS2_H */ |