LXR linux-old/drivers/usb/auerchar.h

   1/*****************************************************************************/
   2/*
   3 *      auerchar.h  --  Auerswald PBX/System Telephone character interface.
   4 *
   5 *      Copyright (C) 2002  Wolfgang Mües (wolfgang@iksw-muees.de)
   6 *
   7 *      This program is free software; you can redistribute it and/or modify
   8 *      it under the terms of the GNU General Public License as published by
   9 *      the Free Software Foundation; either version 2 of the License, or
  10 *      (at your option) any later version.
  11 *
  12 *      This program is distributed in the hope that it will be useful,
  13 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *      GNU General Public License for more details.
  16 *
  17 *      You should have received a copy of the GNU General Public License
  18 *      along with this program; if not, write to the Free Software
  19 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21 /*****************************************************************************/
  22
  23#ifndef AUERCHAR_H
  24#define AUERCHAR_H
  25
  26#include "auerchain.h"
  27#include "auerbuf.h"
  28#include "auerserv.h"
  29
  30/* External data structures / Interface                              */
  31struct audevinfo {
  32        char *buf;              /* return buffer for string contents */
  33        unsigned int bsize;     /* size of return buffer */
  34};
  35
  36/* IO controls */
  37#define IOCTL_AU_SLEN     _IOR( 'U', 0xF0, int) /* return the max. string descriptor length */
  38#define IOCTL_AU_DEVINFO  _IOWR('U', 0xF1, struct audevinfo)    /* get name of a specific device */
  39#define IOCTL_AU_SERVREQ  _IOW( 'U', 0xF2, int) /* request a service channel */
  40#define IOCTL_AU_BUFLEN   _IOR( 'U', 0xF3, int) /* return the max. buffer length for the device */
  41#define IOCTL_AU_RXAVAIL  _IOR( 'U', 0xF4, int) /* return != 0 if Receive Data available */
  42#define IOCTL_AU_CONNECT  _IOR( 'U', 0xF5, int) /* return != 0 if connected to a service channel */
  43#define IOCTL_AU_TXREADY  _IOR( 'U', 0xF6, int) /* return != 0 if Transmitt channel ready to send */
  44/*                              'U'  0xF7..0xFF reserved */
  45
  46/* character device context */
  47struct auerswald;
  48struct auerchar {
  49        struct semaphore mutex;         /* protection in user context */
  50        struct auerswald *auerdev;      /* context pointer of assigned device */
  51        struct auerbufctl bufctl;       /* controls the buffer chain */
  52        struct auerscon scontext;       /* service context */
  53        wait_queue_head_t readwait;     /* for synchronous reading */
  54        struct semaphore readmutex;     /* protection against multiple reads */
  55        struct auerbuf *readbuf;        /* buffer held for partial reading */
  56        unsigned int readoffset;        /* current offset in readbuf */
  57        unsigned int removed;           /* is != 0 if device is removed */
  58};
  59
  60/* Function prototypes */
  61void auerchar_delete(struct auerchar *ccp);
  62
  63int auerchar_open(struct inode *inode, struct file *file);
  64
  65int auerchar_ioctl(struct inode *inode, struct file *file,
  66                   unsigned int cmd, unsigned long arg);
  67
  68loff_t auerchar_llseek(struct file *file, loff_t offset, int origin);
  69
  70ssize_t auerchar_read(struct file *file, char *buf, size_t count,
  71                      loff_t * ppos);
  72
  73ssize_t auerchar_write(struct file *file, const char *buf, size_t len,
  74                       loff_t * ppos);
  75
  76int auerchar_release(struct inode *inode, struct file *file);
  77
  78
  79#endif  /* AUERCHAR_H */
  80