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_SETSCALE11 0x00e6 19 #define PS2_CMD_SETRES 0x10e8 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 27 #define PS2_RET_ERR 0xfc 28 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 */ 34 #define PS2_FLAG_ACK_CMD BIT(5) /* Waiting to ACK the command (first) byte */ 35 36 struct ps2dev { 37 struct serio *serio; 38 39 /* Ensures that only one command is executing at a time */ 40 struct mutex cmd_mutex; 41 42 /* Used to signal completion from interrupt handler */ 43 wait_queue_head_t wait; 44 45 unsigned long flags; 46 u8 cmdbuf[8]; 47 u8 cmdcnt; 48 u8 nak; 49 }; 50 51 void ps2_init(struct ps2dev *ps2dev, struct serio *serio); 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); 54 void ps2_begin_command(struct ps2dev *ps2dev); 55 void ps2_end_command(struct ps2dev *ps2dev); 56 int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); 57 int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); 58 int ps2_sliced_command(struct ps2dev *ps2dev, u8 command); 59 bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data); 60 bool ps2_handle_response(struct ps2dev *ps2dev, u8 data); 61 void ps2_cmd_aborted(struct ps2dev *ps2dev); 62 bool ps2_is_keyboard_id(u8 id); 63 64 #endif /* _LIBPS2_H */ 65