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      1 /*	$NetBSD: mbavar.h,v 1.14 2017/05/22 17:13:09 ragge Exp $ */
      2 /*
      3  * Copyright (c) 1994 Ludd, University of Lule}, Sweden
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include <sys/device.h>
     28 #include <machine/scb.h>
     29 
     30 #define MBCR_INIT	1
     31 #define	MBCR_IE		(1<<2)
     32 #define	MBDS_DPR	(1<<8)
     33 #define	MBSR_NED	(1<<18)
     34 #define	MBDT_MOH	(1<<13)
     35 #define	MBDT_TYPE	511
     36 #define MBDT_TAP	(1<<14)
     37 
     38 #define	CLOSED		0
     39 #define	WANTOPEN	1
     40 #define	RDLABEL		2
     41 #define	OPEN		3
     42 #define	OPENRAW		4
     43 
     44 #define	MAXMBADEV	8	/* Max units per MBA */
     45 
     46 /*
     47  * Devices that have different device drivers.
     48  */
     49 enum	mb_devices {
     50 	MB_UK,	/* unknown */
     51 	MB_RP,	/* RM/RP disk */
     52 	MB_TU,	/* TM03 based tape, ex. TU45 or TU77 */
     53 	MB_MT	/* TU78 tape */
     54 };
     55 
     56 /*
     57  * Current state of the adapter.
     58  */
     59 enum    sc_state {
     60 	SC_AUTOCONF,
     61 	SC_ACTIVE,
     62 	SC_IDLE
     63 };
     64 
     65 /*
     66  * Return value after a finished data transfer, from device driver.
     67  */
     68 enum	xfer_action {
     69 	XFER_RESTART,
     70 	XFER_FINISH
     71 };
     72 
     73 /*
     74  * Info passed do unit device driver during autoconfig.
     75  */
     76 struct	mba_attach_args {
     77 	int	ma_unit;
     78         int	ma_type;
     79 	const char	*ma_name;
     80 	enum	mb_devices ma_devtyp;
     81 	bus_space_tag_t ma_iot;
     82 	bus_space_handle_t ma_ioh;
     83 };
     84 
     85 /*
     86  * Common struct used to communicate between the mba device driver
     87  * and the unit device driver.
     88  */
     89 struct	mba_device {
     90 	STAILQ_ENTRY(mba_device) md_link; /* linked list of runnable devices */
     91 	void (*md_start)(struct mba_device *);
     92 				/* Start routine to be called by mbastart. */
     93 	int (*md_attn)(struct mba_device *);
     94 				/* Routine to be called after attn intr */
     95 	enum xfer_action (*md_finish)(struct mba_device *, int, int *);
     96 				/* Call after xfer finish */
     97 	void *md_softc;		/* Backpointer to this units softc. */
     98 	struct mba_softc *md_mba;
     99 	struct bufq_state *md_q;	/* queue of I/O requests */
    100 };
    101 
    102 struct	mba_softc {
    103 	device_t sc_dev;
    104 	bus_space_tag_t sc_iot;
    105 	bus_space_handle_t sc_ioh;
    106 	STAILQ_HEAD(,mba_device) sc_xfers;
    107 	struct evcnt sc_intrcnt;
    108 	enum sc_state sc_state;
    109 	struct mba_device *sc_md[MAXMBADEV];
    110 };
    111 
    112 struct  mbaunit {
    113 	int     nr;
    114 	const char    *name;
    115 	enum	mb_devices devtyp;
    116 };
    117 
    118 /* Common prototypes */
    119 void	mbaqueue(struct mba_device *);
    120 
    121