FreeBSD/Linux Kernel Cross Reference
sys/netisdn/i4b_l1l2.h

     /* $NetBSD: i4b_l1l2.h,v 1.9 2003/12/04 13:57:31 keihan 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * 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 _I4B_L1L2_H_
    #define _I4B_L1L2_H_
    
    /*
     * This file defines the D-channel interface between layer 1 (physical 
     * card hardware) and layer 2 of a passive ISDN card (i.e. a card that 
     * does not run it's own ISDN stack in firmware).
     *
     * Since each layer 1 driver knows in advance it will need to attach
     * to this layer 2, the whole layer 2 softc struct is typically included
     * in the layer 1 softc.
     *
     * A back-pointer to the layer 1 softc is included (as void*) in this
     * structure.
     */
    
    typedef void * isdn_layer1token;
    
    /*
     * Each driver attaching to layer 2 via this interface provides a pointer
     * to a struct of function pointers used to communicate with layer 1, while
     * layer 1 calls layer 2 functions directly (see below).
     *
     * Layer 1 functions called from layer 2:
     */
    struct isdn_layer1_isdnif_driver {
            /* Request to transmit data. */
            int (*ph_data_req)(isdn_layer1token, struct mbuf *, int);
    
            /* Request to activate layer 1. */
            int (*ph_activate_req)(isdn_layer1token);
    
            /* Request to execute an internal command. */
            int (*mph_command_req)(isdn_layer1token, int, void *);
    };
    
    /*
     * Layer 2 functions called by layer 1:
     */
    
    /* Process a rx'd frame */
    int isdn_layer2_data_ind(struct l2_softc * t, struct isdn_l3_driver *, struct mbuf *m);
    
    /* Pass a layer 1 activation/deactivation to layer 2. */
    int isdn_layer2_activate_ind(struct l2_softc *, struct isdn_l3_driver *, int);
    
    /* Pass trace data to layer 2. */
    struct i4b_trace_hdr;   /* from i4b_trace.h */
    int isdn_layer2_trace_ind(struct l2_softc *, struct isdn_l3_driver *, struct i4b_trace_hdr *, size_t, unsigned char *);
    
    /* Pass status informations to layer 2. */
    int isdn_layer2_status_ind(struct l2_softc *, struct isdn_l3_driver *, int, int);
            
    #endif /* !_I4B_L1L2_H_ */
    

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