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/* $NetBSD: xyreg.h,v 1.1 1995/09/25 20:35:15 chuck Exp $ */
/*
*
* Copyright (c) 1995 Charles D. Cranor
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/*
* x y r e g . h
*
* this file contains the description of the Xylogics 450/451's hardware
* data structures.
*
* author: Chuck Cranor <chuck@ccrc.wustl.edu>
*/
#define XYC_MAXDEV 2 /* max devices per controller */
#define XYC_CTLIOPB XYC_MAXDEV /* controller's iopb */
#define XYC_RESETUSEC 1000000 /* max time for xyc reset (same as xdc?) */
#define XYC_MAXIOPB (XYC_MAXDEV+1)
/* max number of iopbs that can be active */
#define XYC_MAXTIME 4*1000000 /* four seconds before we give up and reset */
#define XYC_MAXTRIES 4 /* max number of times to retry an operation */
#define XYC_INTERLEAVE 1 /* interleave (from disk label?) */
#define XYFM_BPS 0x200 /* must be 512! */
/*
* xyc device interface
* (lives in VME address space) [note: bytes are swapped!]
*/
struct xyc {
volatile u_char xyc_reloc_hi; /* iopb relocation (low byte) */
volatile u_char xyc_reloc_lo; /* iopb relocation (high byte) */
volatile u_char xyc_addr_hi; /* iopb address (low byte) */
volatile u_char xyc_addr_lo; /* iopb address (high byte) */
volatile u_char xyc_rsetup; /* reset/update reg */
volatile u_char xyc_csr; /* control and status register */
};
/*
* xyc_csr
*/
#define XYC_GBSY 0x80 /* go/busy */
#define XYC_ERR 0x40 /* error */
#define XYC_DERR 0x20 /* double error! */
#define XYC_IPND 0x10 /* interrupt pending */
#define XYC_ADRM 0x08 /* 24-bit addressing */
#define XYC_AREQ 0x04 /* attention request */
#define XYC_AACK 0x02 /* attention ack. */
#define XYC_DRDY 0x01 /* drive ready */
/*
* Input/Output Parameter Block (iopb)
*
* all controller commands are done via iopb's. to start a command you
* must do this:
* [1] allocate space in DVMA space for the iopb
* [2] fill out all the fields of the iopb
* [3] if the controller isn't busy, start the iopb by loading the address
* and reloc in the xyc's registers and setting the "go" bit [done]
* [4] controller busy: set AREQ bit, and wait for AACK bit.
* add iopb to the chain, and clear AREQ to resume I/O
*
* when the controller is done with a command it may interrupt (if you
* ask it to) and it will set the XYC_IPND bit in the csr. clear
* the interrupt by writing one to this bit.
*
* the format of the iopb is described in section 2.4 of the manual.
* note that it is byte-swapped on the sun.
*/
struct xy_iopb {
/* section 2.4.2: byte 1 */
volatile u_char resv1:1; /* reserved */
volatile u_char iei:1; /* interrupt on each IOPB done */
volatile u_char ierr:1; /* interrupt on error (no effect on 450) */
volatile u_char hdp:1; /* hold dual port drive */
volatile u_char asr:1; /* autoseek retry */
volatile u_char eef:1; /* enable extended fn. (overlap seek) */
volatile u_char ecm:2; /* ECC correction mode */
#define XY_ECM 2 /* use mode 2 (see section 2.4.2) */
/* section 2.4.1: byte 0 */
volatile u_char aud:1; /* auto-update iopb */
volatile u_char relo:1; /* enable multibus relocation (>16bit addrs)*/
volatile u_char chen:1; /* chain enable, "next iopb" is valid */
volatile u_char ien:1; /* interrupt enable */
volatile u_char com:4; /* command */
#define XYCMD_NOP 0x0 /* no-op */
#define XYCMD_WR 0x1 /* write */
#define XYCMD_RD 0x2 /* read */
#define XYCMD_WTH 0x3 /* write track headers */
#define XYCMD_RTH 0x4 /* read track headers */
#define XYCMD_SK 0x5 /* seek */
#define XYCMD_RST 0x6 /* drive reset */
#define XYCMD_WFM 0x7 /* write format */
#define XYCMD_RDH 0x8 /* read header, data, and ECC */
#define XYCMD_RDS 0x9 /* read drive status */
#define XYCMD_WRH 0xa /* write header, data, and ECC */
#define XYCMD_SDS 0xb /* set drive size */
#define XYCMD_ST 0xc /* self test */
#define XYCMD_R 0xd /* reserved */
#define XYCMD_MBL 0xe /* maint. buffer load */
#define XYCMD_MBD 0xf /* main. buffer dump */
/* section 2.4.4: byte 3 */
volatile u_char errno; /* error or completion code */
/* section 2.4.3: byte 2 */
volatile u_char errs:1; /* error summary bit */
volatile u_char resv2:2; /* reserved */
volatile u_char ctyp:3; /* controller type */
#define XYCT_450 1 /* the 450 controller */
volatile u_char resv3:1; /* reserved */
volatile u_char done:1; /* done! */
/* section 2.4.6: byte 5 */
volatile u_char dt:2; /* drive type */
#define XYC_MAXDT 3 /* largest drive type possible */
volatile u_char resv4:4; /* reserved */
volatile u_char unit:2; /* unit # */
/* section 2.4.5: byte 4 */
volatile u_char bw:1; /* byte(1)/word(0) xfer size */
volatile u_char intlv:4; /* interleave factor (0=1:1, 1=2:1, etc.) */
volatile u_char thro:3; /* dma throttle (0=2,1=4,2=8, etc...) */
#define XY_THRO 4 /* 4 == 32 dma cycles */
/* section 2.4.8: byte 7 */
volatile u_char sect; /* sector # */
/* section 2.4.7: byte 6 */
volatile u_char head; /* head # */
/* section 2.4.9: byte 8,9 */
volatile u_short cyl; /* cyl # */
/* section 2.4.10: byte a,b */
volatile u_short scnt; /* sector count, also drive status */
#define xy_dr_status scnt
#define XYS_ONCL 0x80 /* on-cylinder (active LOW) */
#define XYS_DRDY 0x40 /* drive ready (active LOW) */
#define XYS_WRPT 0x20 /* write protect */
#define XYS_DPB 0x10 /* dual-port busy */
#define XYS_SKER 0x08 /* hard seek error */
#define XYS_DFLT 0x04 /* disk fault */
/* section 2.4.11: byte c,d */
volatile u_short dataa; /* data address */
/* section 2.4.12: byte e,f */
volatile u_short datar; /* data relocation pointer */
/* section 2.4.14: byte 11 */
volatile u_char subfn; /* sub-function */
/* section 2.4.13: byte 10 */
volatile u_char hoff; /* head offset for fixed/removeable drives */
/* section 2.4.15: byte 12,13 */
volatile u_short nxtiopb; /* next iopb address (same relocation) */
/* section 2.4.16: byte 14,15 */
volatile u_short eccpat; /* ecc pattern */
/* section 2.4.17: byte 16,17 */
volatile u_short eccaddr; /* ecc address */
};
/*
* errors (section 2.4.4.1)
*/
/* software error codes */
#define XY_ERR_FAIL 0xff /* general total failure */
#define XY_ERR_DERR 0xfe /* double error */
/* no error */
#define XY_ERR_AOK 0x00 /* success */
#define XY_ERR_IPEN 0x01 /* interrupt pending */
#define XY_ERR_BCFL 0x03 /* busy conflict */
#define XY_ERR_TIMO 0x04 /* operation timeout */
#define XY_ERR_NHDR 0x05 /* header not found */
#define XY_ERR_HARD 0x06 /* hard ECC error */
#define XY_ERR_ICYL 0x07 /* illegal cylinder address */
#define XY_ERR_ISEC 0x0a /* illegal sector address */
#define XY_ERR_SMAL 0x0d /* last sector too small */
#define XY_ERR_SACK 0x0e /* slave ACK error (non-existent memory) */
#define XY_ERR_CHER 0x12 /* cylinder and head/header error */
#define XY_ERR_SRTR 0x13 /* auto-seek retry successful */
#define XY_ERR_WPRO 0x14 /* write-protect error */
#define XY_ERR_UIMP 0x15 /* unimplemented command */
#define XY_ERR_DNRY 0x16 /* drive not ready */
#define XY_ERR_SZER 0x17 /* sector count zero */
#define XY_ERR_DFLT 0x18 /* drive faulted */
#define XY_ERR_ISSZ 0x19 /* illegal sector size */
#define XY_ERR_SLTA 0x1a /* self test a */
#define XY_ERR_SLTB 0x1b /* self test b */
#define XY_ERR_SLTC 0x1c /* self test c */
#define XY_ERR_SOFT 0x1e /* soft ECC error */
#define XY_ERR_SFOK 0x1f /* soft ECC error recovered */
#define XY_ERR_IHED 0x20 /* illegal head */
#define XY_ERR_DSEQ 0x21 /* disk sequencer error */
#define XY_ERR_SEEK 0x25 /* seek error */
/* error actions */
#define XY_ERA_PROG 0x10 /* program error: quit */
#define XY_ERA_SOFT 0x30 /* soft error: we recovered */
#define XY_ERA_HARD 0x40 /* hard error: retry */
#define XY_ERA_RSET 0x60 /* hard error: reset, then retry */
#define XY_ERA_WPRO 0x90 /* write protected */
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