/*      $NetBSD: rfreg.h,v 1.5 2019/10/29 03:49:59 christos Exp $       */
/*
* Copyright (c) 2002 Jochen Kunz.
* 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.
* 3. The name of Jochen Kunz may not be used to endorse or promote
*    products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ
* ``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 JOCHEN KUNZ
* 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.
*/



/* Registers in Uni/QBus I/O space. */
#define RX2CS   0       /* Command and Status Register */
#define RX2DB   2       /* Data Buffer Register */
/* RX2DB is depending on context: */
#define RX2BA   2       /* Bus Address Register */
#define RX2TA   2       /* Track Address Register */
#define RX2SA   2       /* Sector Address Register */
#define RX2WC   2       /* Word Count Register */
#define RX2ES   2       /* Error and Status Register */


/* Bitdefinitions of CSR. */
#define RX2CS_ERR       0x8000  /* Error                                RO */
#define RX2CS_INIT      0x4000  /* Initialize                           WO */
#define RX2CS_UAEBH     0x2000  /* Unibus address extension high bit    WO */
#define RX2CS_UAEBI     0x1000  /* Unibus address extension low bit     WO */
#define RX2CS_RX02      0x0800  /* RX02                                 RO */
/*                      0x0400     Not Used                             -- */
/*                      0x0200     Not Used                             -- */
#define RX2CS_DD        0x0100  /* Double Density                       R/W */
#define RX2CS_TR        0x0080  /* Transfer Request                     RO */
#define RX2CS_IE        0x0040  /* Interrupt Enable                     R/W */
#define RX2CS_DONE      0x0020  /* Done                                 RO */
#define RX2CS_US        0x0010  /* Unit Select                          WO */
#define RX2CS_FCH       0x0008  /* Function Code high bit               WO */
#define RX2CS_FCM       0x0004  /* Function Code mid bit                WO */
#define RX2CS_FCL       0x0002  /* Function Code low bit                WO */
#define RX2CS_GO        0x0001  /* Go                                   WO */
#define RX2CS_NU        0x0600  /* not used bits                        -- */


#define RX2CS_UAEB      ( RX2CS_UAEBH | RX2CS_UAEBI )
#define RX2CS_FC        ( RX2CS_FCH | RX2CS_FCM | RX2CS_FCL )


/* Commands of the controller and parameter cont. */
#define RX2CS_FBUF      0x1     /* Fill Buffer, word count and bus address */
#define RX2CS_EBUF      0x3     /* Empty Buffer, word count and bus address */
#define RX2CS_WSEC      0x5     /* Write Sector, sector and track */
#define RX2CS_RSEC      0x7     /* Read Sector, sector and track */
#define RX2CS_SMD       0x9     /* Set Media Density, ??? */
#define RX2CS_RSTAT     0xb     /* Read Status, no params */
#define RX2CS_WDDS      0xd     /* Write Deleted Data Sector, sector and track */
#define RX2CS_REC       0xf     /* Read Error Code, bus address */
#define RX2CS_MASK      0xf


/* Track Address Register */
#define RX2TA_MASK      0x7f


/* Sector Address Register */
#define RX2SA_MASK      0x1f


/* Word Count Register */
#define RX2WC_MASK      0x7f


/* Bitdefinitions of RX2ES. */
/*                      <15-12> Not Used                -- */
#define RX2ES_NEM       0x0800  /* Non-Existend Memory  RO */
#define RX2ES_WCO       0x0400  /* Word Count Overflow  RO */
/*                      0x0200     Not Used             RO */
#define RX2ES_US        0x0010  /* Unit Select          RO */
#define RX2ES_RDY       0x0080  /* Ready                RO */
#define RX2ES_DEL       0x0040  /* Deleted Data         RO */
#define RX2ES_DD        0x0020  /* Double Density       RO */
#define RX2ES_DE        0x0010  /* Density Error        RO */
#define RX2ES_ACL       0x0008  /* AC Lost              RO */
#define RX2ES_ID        0x0004  /* Initialize Done      RO */
/*                      0x0002     Not Used             -- */
#define RX2ES_CRCE      0x0001  /* CRC Error            RO */
#define RX2ES_NU        0xF202  /* not used bits        -- */


#define RX2_TRACKS      77      /* number of tracks */
#define RX2_SECTORS     26      /* number of sectors / track */
#define RX2_BYTE_SD     128     /* number of bytes / sector in single density */
#define RX2_BYTE_DD     256     /* number of bytes / sector in double density */
#define RX2_HEADS       1       /* number of heads */

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