/*      $NetBSD: mbavar.h,v 1.14 2017/05/22 17:13:09 ragge Exp $ */
/*
 * Copyright (c) 1994 Ludd, University of Lule}, Sweden
 * All rights reserved.
 *
 * 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 AUTHOR ``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 AUTHOR 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.
 */

#include <sys/device.h>
#include <machine/scb.h>

#define MBCR_INIT       1
#define MBCR_IE         (1<<2)
#define MBDS_DPR        (1<<8)
#define MBSR_NED        (1<<18)
#define MBDT_MOH        (1<<13)
#define MBDT_TYPE       511
#define MBDT_TAP        (1<<14)

#define CLOSED          0
#define WANTOPEN        1
#define RDLABEL         2
#define OPEN            3
#define OPENRAW         4

#define MAXMBADEV       8       /* Max units per MBA */

/*
 * Devices that have different device drivers.
 */
enum    mb_devices {
        MB_UK,  /* unknown */
        MB_RP,  /* RM/RP disk */
        MB_TU,  /* TM03 based tape, ex. TU45 or TU77 */
        MB_MT   /* TU78 tape */
};

/*
 * Current state of the adapter.
 */
enum    sc_state {
        SC_AUTOCONF,
        SC_ACTIVE,
        SC_IDLE
};

/*
 * Return value after a finished data transfer, from device driver.
 */
enum    xfer_action {
        XFER_RESTART,
        XFER_FINISH
};

/*
 * Info passed do unit device driver during autoconfig.
 */
struct  mba_attach_args {
        int     ma_unit;
        int     ma_type;
        const char      *ma_name;
        enum    mb_devices ma_devtyp;
        bus_space_tag_t ma_iot;
        bus_space_handle_t ma_ioh;
};

/*
 * Common struct used to communicate between the mba device driver
 * and the unit device driver.
 */
struct  mba_device {
        STAILQ_ENTRY(mba_device) md_link; /* linked list of runnable devices */
        void (*md_start)(struct mba_device *);
                                /* Start routine to be called by mbastart. */
        int (*md_attn)(struct mba_device *);
                                /* Routine to be called after attn intr */
        enum xfer_action (*md_finish)(struct mba_device *, int, int *);
                                /* Call after xfer finish */
        void *md_softc;         /* Backpointer to this units softc. */
        struct mba_softc *md_mba;
        struct bufq_state *md_q;        /* queue of I/O requests */
};

struct  mba_softc {
        device_t sc_dev;
        bus_space_tag_t sc_iot;
        bus_space_handle_t sc_ioh;
        STAILQ_HEAD(,mba_device) sc_xfers;
        struct evcnt sc_intrcnt;
        enum sc_state sc_state;
        struct mba_device *sc_md[MAXMBADEV];
};

struct  mbaunit {
        int     nr;
        const char    *name;
        enum    mb_devices devtyp;
};

/* Common prototypes */
void    mbaqueue(struct mba_device *);