1 /*****************************************************************************/
3 * auerchar.h -- Auerswald PBX/System Telephone character interface.
5 * Copyright (C) 2002 Wolfgang Mües (wolfgang@iksw-muees.de)
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.
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.
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.
21 /*****************************************************************************/
26 #include "auerchain.h"
30 /* External data structures / Interface */
32 char *buf; /* return buffer for string contents */
33 unsigned int bsize; /* size of return buffer */
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 */
46 /* character device context */
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 */
60 /* Function prototypes */
61 void auerchar_delete(struct auerchar *ccp);
63 int auerchar_open(struct inode *inode, struct file *file);
65 int auerchar_ioctl(struct inode *inode, struct file *file,
66 unsigned int cmd, unsigned long arg);
68 loff_t auerchar_llseek(struct file *file, loff_t offset, int origin);
70 ssize_t auerchar_read(struct file *file, char *buf, size_t count,
73 ssize_t auerchar_write(struct file *file, const char *buf, size_t len,
76 int auerchar_release(struct inode *inode, struct file *file);
79 #endif /* AUERCHAR_H */