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 27 struct 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 42 void ps2_init(struct ps2dev *ps2dev, struct serio *serio); 43 int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout); 44 void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout); 45 int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command); 46 int ps2_schedule_command(struct ps2dev *ps2dev, unsigned char *param, int command); 47 int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data); 48 int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data); 49 void ps2_cmd_aborted(struct ps2dev *ps2dev); 50 51 #endif /* _LIBPS2_H */ 52