include/linux/libps2.h

   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 #define PS2_RET_ERR             0xfc
  22
  23 #define PS2_FLAG_ACK            1       /* Waiting for ACK/NAK */
  24 #define PS2_FLAG_CMD            2       /* Waiting for command to finish */
  25 #define PS2_FLAG_CMD1           4       /* Waiting for the first byte of command response */
  26 #define PS2_FLAG_WAITID         8       /* Command execiting is GET ID */
  27 #define PS2_FLAG_NAK            16      /* Last transmission was NAKed */
  28
  29 struct ps2dev {
  30         struct serio *serio;
  31
  32         /* Ensures that only one command is executing at a time */
  33         struct mutex cmd_mutex;
  34
  35         /* Used to signal completion from interrupt handler */
  36         wait_queue_head_t wait;
  37
  38         unsigned long flags;
  39         unsigned char cmdbuf[6];
  40         unsigned char cmdcnt;
  41         unsigned char nak;
  42 };
  43
  44 void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
  45 int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
  46 void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
  47 int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
  48 int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
  49 int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
  50 void ps2_cmd_aborted(struct ps2dev *ps2dev);
  51 int ps2_is_keyboard_id(char id);
  52
  53 #endif /* _LIBPS2_H */