/*      $NetBSD: rlreg.h,v 1.5 2017/05/22 17:22:29 ragge Exp $  */

/*
* Copyright (c) 2000 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.
*/

/*
* RL11 registers.
*/
#define RL_CS           0
#define RL_BA           2
#define RL_DA           4
#define RL_MP           6
#define RL_BAE          8       /* Only on RLV12 */

/*
* Bits in Control/Status register
*/
#define RLCS_DRDY       0000001
#define RLCS_IE         0000100
#define RLCS_CRDY       0000200
#define RLCS_DE         0040000
#define RLCS_ERR        0100000
#define RLCS_ERRMSK     0036000
/* Command to give to drive */
#define RLCS_NOOP       0000000         /* No operation */
#define RLCS_WCK        0000002         /* Write Check */
#define RLCS_GS         0000004         /* Get Status */
#define RLCS_SEEK       0000006         /* Seek */
#define RLCS_RHDR       0000010         /* Read Header */
#define RLCS_WD         0000012         /* Write data */
#define RLCS_RD         0000014         /* Read data */
#define RLCS_RDWO       0000016         /* Read data without hdr check */
#define RLCS_USHFT      8               /* Shift unit number left */
#define RLCS_ADSHFT     4               /* Shift address bits 16-17 left */

/*
* Bits in Disk Address register
*/
#define RLDA_SEEK       0000001         /* Issue a "Seek" command */
#define RLDA_GS         0000003         /* Issue a "Get Status" command */
#define RLDA_DIR        0000004         /* Move head towards spindle */
#define RLDA_RST        0000010         /* Reset the drive */
#define RLDA_HSSEEK     0000020         /* Head select for seek */
#define RLDA_HSRW       0000100         /* Head select for read/write */
#define RLDA_CYLSHFT    7

/*
* Bits in Multipurpose register
*/
#define RLMP_STATUS     0000007         /* Status bits mask */
#define RLMP_UNLOAD     0               /* not loaded */
#define RLMP_SPINUP     1               /* spinning up */
#define RLMP_BRUSHING   2               /* brushes out */
#define RLMP_LOADHEADS  3               /* loading heads */
#define RLMP_SEEKING    4               /* seeking */
#define RLMP_LOCKED     5               /* lock turned on */
#define RLMP_UNLHEADS   6               /* unloading heads */
#define RLMP_SPUNDOWN   7               /* disk spun down */

#define RLMP_DT         0000200         /* Set if RL02, otherwise RL01 */
#define RLMP_HS         0000100         /* Head select */

/*
* RL01/RL02 disk layout.
*/
#define RL_BPS          256             /* Bytes/sector */
#define RL_SPT          40              /* Sectors/track */
#define RL_TPS01        256             /* Tracks/surface RL01 */
#define RL_TPS02        512             /* Tracks/surface RL02 */
#define RL_SPD          2               /* Surfaces/disk */

/*
* Other...
*/
#define RL_MAXDPC       4               /* Max disks/controller */