/* $Id: capi.h,v 1.1.4.1 2001/11/20 14:19:34 kai Exp $
 *
 * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000.
 *
 * Author       Fritz Elfert
 * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * Thanks to Friedemann Baitinger and IBM Germany
 *
 */

#ifndef CAPI_H
#define CAPI_H

/* Command-part of a CAPI message */
typedef struct actcapi_msgcmd {
	__u8 cmd;
	__u8 subcmd;
} actcapi_msgcmd;

/* CAPI message header */
typedef struct actcapi_msghdr {
	__u16 len;
	__u16 applicationID;
	actcapi_msgcmd cmd;
	__u16 msgnum;
} actcapi_msghdr;

/* CAPI message description (for debugging) */
typedef struct actcapi_msgdsc {
	actcapi_msgcmd cmd;
	char *description;
} actcapi_msgdsc;

/* CAPI Address */
typedef struct actcapi_addr {
	__u8 len;                            /* Length of element            */
	__u8 tnp;                            /* Type/Numbering Plan          */
	__u8 num[20];                        /* Caller ID                    */
} actcapi_addr;

/* CAPI INFO element mask */
typedef  union actcapi_infonr {              /* info number                  */
	__u16 mask;                          /* info-mask field              */
	struct bmask {                       /* bit definitions              */
		unsigned  codes : 3;         /* code set                     */
		unsigned  rsvd  : 5;         /* reserved                     */
		unsigned  svind : 1;         /* single, variable length ind. */
		unsigned  wtype : 7;         /* W-element type               */
	} bmask;
} actcapi_infonr;

/* CAPI INFO element */
typedef union  actcapi_infoel {              /* info element                 */
	__u8 len;                            /* length of info element       */
	__u8 display[40];                    /* display contents             */
	__u8 uuinfo[40];                     /* User-user info field         */
	struct cause {                       /* Cause information            */
		unsigned ext2  : 1;          /* extension                    */
		unsigned cod   : 2;          /* coding standard              */
		unsigned spare : 1;          /* spare                        */
		unsigned loc   : 4;          /* location                     */
		unsigned ext1  : 1;          /* extension                    */
		unsigned cval  : 7;          /* Cause value                  */
	} cause;                     
	struct charge {                      /* Charging information         */
		__u8 toc;                    /* type of charging info        */
		__u8 unit[10];               /* charging units               */
	} charge;
	__u8 date[20];                       /* date fields                  */
	__u8 stat;                           /* state of remote party        */
} actcapi_infoel;

/* Message for EAZ<->MSN Mapping */
typedef struct actcapi_msn {
	__u8 eaz;
	__u8 len;                            /* Length of MSN                */
	__u8 msn[15] __attribute__ ((packed));
} actcapi_msn;

typedef struct actcapi_dlpd {
	__u8 len;                            /* Length of structure          */
	__u16 dlen __attribute__ ((packed)); /* Data Length                  */
	__u8 laa __attribute__ ((packed));   /* Link Address A               */
	__u8 lab;                            /* Link Address B               */
	__u8 modulo;                         /* Modulo Mode                  */
	__u8 win;                            /* Window size                  */
	__u8 xid[100];                       /* XID Information              */
} actcapi_dlpd;

typedef struct actcapi_ncpd {
	__u8   len;                          /* Length of structure          */
	__u16  lic __attribute__ ((packed));
	__u16  hic __attribute__ ((packed));
	__u16  ltc __attribute__ ((packed));
	__u16  htc __attribute__ ((packed));
	__u16  loc __attribute__ ((packed));
	__u16  hoc __attribute__ ((packed));
	__u8   modulo __attribute__ ((packed));
} actcapi_ncpd;
#define actcapi_ncpi actcapi_ncpd

/*
 * Layout of NCCI field in a B3 DATA CAPI message is different from
 * standard at act2000:
 *
 * Bit 0-4  = PLCI
 * Bit 5-7  = Controller
 * Bit 8-15 = NCCI
 */
#define MAKE_NCCI(plci,contr,ncci) \
        ((plci & 0x1f) | ((contr & 0x7) << 5) | ((ncci & 0xff) << 8))

#define EVAL_NCCI(fakencci,plci,contr,ncci) { \
	plci  = fakencci & 0x1f; \
	contr = (fakencci >> 5) & 0x7; \
	ncci  = (fakencci >> 8) & 0xff; \
}

/*
 * Layout of PLCI field in a B3 DATA CAPI message is different from
 * standard at act2000:
 *
 * Bit 0-4  = PLCI
 * Bit 5-7  = Controller
 * Bit 8-15 = reserved (must be 0)
 */
#define MAKE_PLCI(plci,contr) \
        ((plci & 0x1f) | ((contr & 0x7) << 5))

#define EVAL_PLCI(fakeplci,plci,contr) { \
	plci  = fakeplci & 0x1f; \
	contr = (fakeplci >> 5) & 0x7; \
}

typedef struct actcapi_msg {
	actcapi_msghdr hdr;
	union msg {
		__u16 manuf_msg;
		struct manufacturer_req_net {
			__u16 manuf_msg;
			__u16 controller;
			__u8  nettype;
		} manufacturer_req_net;
		struct manufacturer_req_v42 {
			__u16 manuf_msg;
			__u16 controller;
			__u32 v42control;
		} manufacturer_req_v42;
		struct manufacturer_conf_v42 {
			__u16 manuf_msg;
			__u16 controller;
		} manufacturer_conf_v42;
		struct manufacturer_req_err {
			__u16 manuf_msg;
			__u16 controller;
		} manufacturer_req_err;
		struct manufacturer_ind_err {
			__u16 manuf_msg;
			__u16 controller;
			__u32 errcode;
			__u8  errstring; /* actually up to 160 */
		} manufacturer_ind_err;
		struct manufacturer_req_msn {
			__u16 manuf_msg;
			__u16 controller;
			actcapi_msn msnmap;
		} manufacturer_req_msn;
		/* TODO: TraceInit-req/conf/ind/resp and
		 *       TraceDump-req/conf/ind/resp
		 */
		struct connect_req {
			__u8  controller;
			__u8  bchan;
			__u32 infomask __attribute__ ((packed));
			__u8  si1;
			__u8  si2;
			__u8  eaz;
			actcapi_addr addr;
		} connect_req;
		struct connect_conf {
			__u16 plci;
			__u16 info;
		} connect_conf;
		struct connect_ind {
			__u16 plci;
			__u8  controller;
			__u8  si1;
			__u8  si2;
			__u8  eaz;
			actcapi_addr addr;
		} connect_ind;
		struct connect_resp {
			__u16 plci;
			__u8  rejectcause;
		} connect_resp;
		struct connect_active_ind {
			__u16 plci;
			actcapi_addr addr;
		} connect_active_ind;
		struct connect_active_resp {
			__u16 plci;
		} connect_active_resp;
		struct connect_b3_req {
			__u16 plci;
			actcapi_ncpi ncpi;
		} connect_b3_req;
		struct connect_b3_conf {
			__u16 plci;
			__u16 ncci;
			__u16 info;
		} connect_b3_conf;
		struct connect_b3_ind {
			__u16 ncci;
			__u16 plci;
			actcapi_ncpi ncpi;
		} connect_b3_ind;
		struct connect_b3_resp {
			__u16 ncci;
			__u8  rejectcause;
			actcapi_ncpi ncpi __attribute__ ((packed));
		} connect_b3_resp;
		struct disconnect_req {
			__u16 plci;
			__u8  cause;
		} disconnect_req;
		struct disconnect_conf {
			__u16 plci;
			__u16 info;
		} disconnect_conf;
		struct disconnect_ind {
			__u16 plci;
			__u16 info;
		} disconnect_ind;
		struct disconnect_resp {
			__u16 plci;
		} disconnect_resp;
		struct connect_b3_active_ind {
			__u16 ncci;
			actcapi_ncpi ncpi;
		} connect_b3_active_ind;
		struct connect_b3_active_resp {
			__u16 ncci;
		} connect_b3_active_resp;
		struct disconnect_b3_req {
			__u16 ncci;
			actcapi_ncpi ncpi;
		} disconnect_b3_req;
		struct disconnect_b3_conf {
			__u16 ncci;
			__u16 info;
		} disconnect_b3_conf;
		struct disconnect_b3_ind {
			__u16 ncci;
			__u16 info;
			actcapi_ncpi ncpi;
		} disconnect_b3_ind;
		struct disconnect_b3_resp {
			__u16 ncci;
		} disconnect_b3_resp;
		struct info_ind {
			__u16 plci;
			actcapi_infonr nr;
			actcapi_infoel el;
		} info_ind;
		struct info_resp {
			__u16 plci;
		} info_resp;
		struct listen_b3_req {
			__u16 plci;
		} listen_b3_req;
		struct listen_b3_conf {
			__u16 plci;
			__u16 info;
		} listen_b3_conf;
		struct select_b2_protocol_req {
			__u16 plci;
			__u8  protocol;
			actcapi_dlpd dlpd __attribute__ ((packed));
		} select_b2_protocol_req;
		struct select_b2_protocol_conf {
			__u16 plci;
			__u16 info;
		} select_b2_protocol_conf;
		struct select_b3_protocol_req {
			__u16 plci;
			__u8  protocol;
			actcapi_ncpd ncpd __attribute__ ((packed));
		} select_b3_protocol_req;
		struct select_b3_protocol_conf {
			__u16 plci;
			__u16 info;
		} select_b3_protocol_conf;
		struct listen_req {
			__u8  controller;
			__u32 infomask __attribute__ ((packed));  
			__u16 eazmask __attribute__ ((packed));
			__u16 simask __attribute__ ((packed));
		} listen_req;
		struct listen_conf {
			__u8  controller;
			__u16 info __attribute__ ((packed));
		} listen_conf;
		struct data_b3_req {
			__u16 fakencci;
			__u16 datalen;
			__u32 unused;
			__u8  blocknr;
			__u16 flags __attribute__ ((packed));
		} data_b3_req;
		struct data_b3_ind {
			__u16 fakencci;
			__u16 datalen;
			__u32 unused;
			__u8  blocknr;
			__u16 flags __attribute__ ((packed));
		} data_b3_ind;
		struct data_b3_resp {
			__u16 ncci;
			__u8  blocknr;
		} data_b3_resp;
		struct data_b3_conf {
			__u16 ncci;
			__u8  blocknr;
			__u16 info __attribute__ ((packed));
		} data_b3_conf;
	} msg;
} actcapi_msg;

static inline unsigned short
actcapi_nextsmsg(act2000_card *card)
{
	unsigned long flags;
	unsigned short n;

	save_flags(flags);
	cli();
	n = card->msgnum;
	card->msgnum++;
	card->msgnum &= 0x7fff;
	restore_flags(flags);
	return n;
}
#define DEBUG_MSG
#undef DEBUG_DATA_MSG
#undef DEBUG_DUMP_SKB

extern int actcapi_chkhdr(act2000_card *, actcapi_msghdr *);
extern int actcapi_listen_req(act2000_card *);
extern int actcapi_manufacturer_req_net(act2000_card *);
extern int actcapi_manufacturer_req_v42(act2000_card *, ulong);
extern int actcapi_manufacturer_req_errh(act2000_card *);
extern int actcapi_manufacturer_req_msn(act2000_card *);
extern int actcapi_connect_req(act2000_card *, act2000_chan *, char *, char, int, int);
extern void actcapi_select_b2_protocol_req(act2000_card *, act2000_chan *);
extern void actcapi_disconnect_b3_req(act2000_card *, act2000_chan *);
extern void actcapi_connect_resp(act2000_card *, act2000_chan *, __u8);
extern void actcapi_dispatch(act2000_card *);
#ifdef DEBUG_MSG
extern void actcapi_debug_msg(struct sk_buff *skb, int);
#else
#define actcapi_debug_msg(skb, len)
#endif
#endif