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