/* r3964 linediscipline for linux
*
* -----------------------------------------------------------
* Copyright by
* Philips Automation Projects
* Kassel (Germany)
* -----------------------------------------------------------
* This software may be used and distributed according to the terms of
* the GNU General Public License, incorporated herein by reference.
*
* Author:
* L. Haag
*
* $Log: r3964.h,v $
* Revision 1.4 2005/12/21 19:54:24 Kurt Huwig <kurt huwig de>
* Fixed HZ usage on 2.6 kernels
* Removed unnecessary include
*
* Revision 1.3 2001/03/18 13:02:24 dwmw2
* Fix timer usage, use spinlocks properly.
*
* Revision 1.2 2001/03/18 12:53:15 dwmw2
* Merge changes in 2.4.2
*
* Revision 1.1.1.1 1998/10/13 16:43:14 dwmw2
* This'll screw the version control
*
* Revision 1.6 1998/09/30 00:40:38 dwmw2
* Updated to use kernel's N_R3964 if available
*
* Revision 1.4 1998/04/02 20:29:44 lhaag
* select, blocking, ...
*
* Revision 1.3 1998/02/12 18:58:43 root
* fixed some memory leaks
* calculation of checksum characters
*
* Revision 1.2 1998/02/07 13:03:17 root
* ioctl read_telegram
*
* Revision 1.1 1998/02/06 19:19:43 root
* Initial revision
*
*
*/

#ifndef _UAPI__LINUX_N_R3964_H__
#define _UAPI__LINUX_N_R3964_H__

/* line disciplines for r3964 protocol */


/*
* Ioctl-commands
*/

#define R3964_ENABLE_SIGNALS 0x5301
#define R3964_SETPRIORITY 0x5302
#define R3964_USE_BCC 0x5303
#define R3964_READ_TELEGRAM 0x5304

/* Options for R3964_SETPRIORITY */
#define R3964_MASTER 0
#define R3964_SLAVE 1

/* Options for R3964_ENABLE_SIGNALS */
#define R3964_SIG_ACK 0x0001
#define R3964_SIG_DATA 0x0002
#define R3964_SIG_ALL 0x000f
#define R3964_SIG_NONE 0x0000
#define R3964_USE_SIGIO 0x1000

/*
* r3964 operation states:
*/

/* types for msg_id: */
enum {R3964_MSG_ACK=1, R3964_MSG_DATA };

#define R3964_MAX_MSG_COUNT 32

/* error codes for client messages */
#define R3964_OK 0 /* no error. */
#define R3964_TX_FAIL -1 /* transmission error, block NOT sent */
#define R3964_OVERFLOW -2 /* msg queue overflow */

/* the client gets this struct when calling read(fd,...): */
struct r3964_client_message {
int msg_id;
int arg;
int error_code;
};

#define R3964_MTU 256



#endif /* _UAPI__LINUX_N_R3964_H__ */