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mbavar.h revision 1.13 
      1 /*	$NetBSD: mbavar.h,v 1.13 2008/10/16 12:47:22 hans 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  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed at Ludd, University of Lule}.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/device.h>
     33 #include <machine/scb.h>
     34 
     35 #define MBCR_INIT	1
     36 #define	MBCR_IE		(1<<2)
     37 #define	MBDS_DPR	(1<<8)
     38 #define	MBSR_NED	(1<<18)
     39 #define	MBDT_MOH	(1<<13)
     40 #define	MBDT_TYPE	511
     41 #define MBDT_TAP	(1<<14)
     42 
     43 #define	CLOSED		0
     44 #define	WANTOPEN	1
     45 #define	RDLABEL		2
     46 #define	OPEN		3
     47 #define	OPENRAW		4
     48 
     49 #define	MAXMBADEV	8	/* Max units per MBA */
     50 
     51 /*
     52  * Devices that have different device drivers.
     53  */
     54 enum	mb_devices {
     55 	MB_UK,	/* unknown */
     56 	MB_RP,	/* RM/RP disk */
     57 	MB_TU,	/* TM03 based tape, ex. TU45 or TU77 */
     58 	MB_MT	/* TU78 tape */
     59 };
     60 
     61 /*
     62  * Current state of the adapter.
     63  */
     64 enum    sc_state {
     65 	SC_AUTOCONF,
     66 	SC_ACTIVE,
     67 	SC_IDLE
     68 };
     69 
     70 /*
     71  * Return value after a finished data transfer, from device driver.
     72  */
     73 enum	xfer_action {
     74 	XFER_RESTART,
     75 	XFER_FINISH
     76 };
     77 
     78 /*
     79  * Info passed do unit device driver during autoconfig.
     80  */
     81 struct	mba_attach_args {
     82 	int	ma_unit;
     83         int	ma_type;
     84 	const char	*ma_name;
     85 	enum	mb_devices ma_devtyp;
     86 	bus_space_tag_t ma_iot;
     87 	bus_space_handle_t ma_ioh;
     88 };
     89 
     90 /*
     91  * Common struct used to communicate between the mba device driver
     92  * and the unit device driver.
     93  */
     94 struct	mba_device {
     95 	STAILQ_ENTRY(mba_device) md_link; /* linked list of runnable devices */
     96 	void (*md_start)(struct mba_device *);
     97 				/* Start routine to be called by mbastart. */
     98 	int (*md_attn)(struct mba_device *);
     99 				/* Routine to be called after attn intr */
    100 	enum xfer_action (*md_finish)(struct mba_device *, int, int *);
    101 				/* Call after xfer finish */
    102 	void *md_softc;		/* Backpointer to this units softc. */
    103 	struct mba_softc *md_mba;
    104 	struct bufq_state *md_q;	/* queue of I/O requests */
    105 };
    106 
    107 struct	mba_softc {
    108 	device_t sc_dev;
    109 	bus_space_tag_t sc_iot;
    110 	bus_space_handle_t sc_ioh;
    111 	STAILQ_HEAD(,mba_device) sc_xfers;
    112 	struct evcnt sc_intrcnt;
    113 	enum sc_state sc_state;
    114 	struct mba_device *sc_md[MAXMBADEV];
    115 };
    116 
    117 struct  mbaunit {
    118 	int     nr;
    119 	const char    *name;
    120 	enum	mb_devices devtyp;
    121 };
    122 
    123 /* Common prototypes */
    124 void	mbaqueue(struct mba_device *);
    125 
    126