/* $NetBSD: daicvar.h,v 1.12 2012/10/27 17:18:20 chs Exp $ */

/*-
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Martin Husemann <martin@NetBSD.org>.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef DIEHLISDNVAR
#define DIEHLISDNVAR
#if defined(KERNEL) || defined(_KERNEL)

#define	DAIC_MAX_PORT		4
#define	DAIC_ISA_MEMSIZE	2048
#define	DAIC_ISA_QUADSIZE	(DAIC_MAX_PORT*DAIC_ISA_MEMSIZE)
#define	DAIC_MAX_ACTIVE		(2*DAIC_MAX_PORT)	/* simlutaneous connections on one instance */

/* A queue of pending outgoing calls */
struct outcallentry {
	TAILQ_ENTRY(outcallentry) queue;
	unsigned int cdid;	/* call descriptor id for layer 4 */
	u_int8_t dchan_id;	/* task id for microcode */
	u_int8_t rc;		/* return code */
};

/* One active connection */
struct daic_connection {
	u_int cdid;			/* layer 4 call descriptor id */
	struct ifqueue tx_queue;	/* outgoing data */
	struct ifqueue rx_queue;	/* incoming data */
	isdn_link_t isdn_linktab;	/* description of ourself */
	const struct isdn_l4_driver_functions
			*l4_driver;		/* layer 4 driver		*/
	void		*l4_driver_softc;	/* layer 4 driver instance	*/
	u_int8_t dchan_inst;		/* d-channel instance */
	u_int8_t dchan_rc;		/* return code for dchannel requests */
	u_int8_t bchan_inst;		/* b-channel instance */
	u_int8_t bchan_rc;		/* return code for bchannel requests */
};

/*
 * One BRI as exposed to the upper layers, with all the internal management
 * information we need for it. A pointer to this is passed as the driver
 * token.
 */
struct daic_unit {
	struct daic_softc *du_sc;	/* pointer to softc */
	const struct isdn_l3_driver *du_l3;
	int du_port;			/* port number (on multi BRI cards) */
	int du_state;			/* state of board, see below */
#define	DAIC_STATE_COLD		0	/* nothing happened to the board */
#define	DAIC_STATE_DOWNLOAD	1	/* the card is waiting for protocol code */
#define DAIC_STATE_TESTING	2	/* waiting for first interrupt from card */
#define	DAIC_STATE_RUNNING	3	/* the protocol is running */
#define	DAIC_STATE_DIAGNOSTIC	4	/* temporary disabled for diagnostics */

	int du_assign;			/* allocate new protocol instance */
#define	DAIC_ASSIGN_PENDING	1	/* we are awaiting a new ID */
#define	DAIC_ASSIGN_SLEEPING	2	/* somebody sleeping, wakeup after we got the ID */
#define	DAIC_ASSIGN_GLOBAL	4	/* result is a global d-channel id */
#define	DAIC_ASSIGN_NOGLOBAL	8	/* need to assign a global d-channel id */

	u_int8_t du_global_dchan;	/* handle of global dchannel instance */
	u_int8_t du_request_res;	/* result of requests */
	u_int8_t du_assign_res;		/* result of assigns */
};

/* superclass of all softc structs for attachments, you should
 * always be able to cast an attachments device_t self to this. */
struct daic_softc {
	device_t sc_dev;
	bus_space_tag_t sc_iot;		/* bus identifier */
	bus_space_handle_t sc_ioh;	/* mem handle */
	int sc_cardtype;		/* variant of card */
#define	DAIC_TYPE_S	0
#define	DAIC_TYPE_SX	1
#define	DAIC_TYPE_SCOM	2
#define	DAIC_TYPE_QUAD	3

	struct daic_unit sc_port[DAIC_MAX_PORT];

	/* one record for each b-channel we could handle concurrently */
	struct daic_connection sc_con[DAIC_MAX_ACTIVE];

	/* a tailq of ougoing calls no yet assigned to any b-channel */
	TAILQ_HEAD(outcallhead, outcallentry) sc_outcalls[DAIC_MAX_PORT];
};

/*
 * functions exported from MI part
 */
extern int daic_probe(bus_space_tag_t bus, bus_space_handle_t io);
extern void daic_attach(device_t self, struct daic_softc *sc);
extern int daic_intr(struct daic_softc *);

#endif
#endif