linux/include/linux/libps2.h
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   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
  29struct 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
  44void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
  45int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
  46void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
  47void ps2_begin_command(struct ps2dev *ps2dev);
  48void ps2_end_command(struct ps2dev *ps2dev);
  49int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
  50int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
  51int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
  52int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
  53void ps2_cmd_aborted(struct ps2dev *ps2dev);
  54int ps2_is_keyboard_id(char id);
  55
  56#endif /* _LIBPS2_H */
  57
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