/*      $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 *);