1163 lines
26 KiB
C
1163 lines
26 KiB
C
/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)wt.c 7.1 (Berkeley) 5/9/91
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*/
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/*
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*
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* Copyright (c) 1989 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Authors: Robert Baron
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include "wt.h"
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#if NWT > 0
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/*
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* HISTORY
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* $Log: wt.c,v $
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* Revision 2.2.1.3 90/01/08 13:29:38 rvb
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* Add Intel copyright.
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* [90/01/08 rvb]
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*
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* Revision 2.2.1.2 89/12/21 18:00:09 rvb
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* Change WTPRI to make the streamer tape read/write
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* interruptible. [lin]
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*
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* Revision 2.2.1.1 89/11/10 09:49:49 rvb
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* ORC likes their streamer port at 0x288.
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* [89/11/08 rvb]
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*
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* Revision 2.2 89/09/25 12:33:02 rvb
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* Driver was provided by Intel 9/18/89.
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* [89/09/23 rvb]
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*
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*/
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/*
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*
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* Copyright 1988, 1989 by Intel Corporation
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*
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* Support Bell Tech QIC-02 and WANGTEK QIC-36 or QIC-02
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*/
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/*#include <sys/errno.h>
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#include <sys/signal.h>
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#include <sys/types.h>*/
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#include "sys/param.h"
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#include "sys/buf.h"
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#include "sys/file.h"
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#include "sys/proc.h"
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#include "sys/user.h"
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#include "i386/isa/wtreg.h"
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#ifdef ORC
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unsigned wtport = 0x288; /* base I/O port of controller */
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#else ORC
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unsigned wtport = 0x300; /* base I/O port of controller */
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#endif ORC
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/* standard = 0x300 */
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/* alternate = 0x338 */
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unsigned wtchan = 1; /* DMA channel number */
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/* stardard = 1 */
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/* hardware permits 1, 2 or 3. */
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/* (Avoid DMA 2: used by disks) */
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int first_wtopen_ever = 1;
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#define ERROR 1 /* return from tape routines */
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#define SUCCESS 0 /* return from tape routines */
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int wci = 0;
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int exflag = 0;
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int bytes = 0;
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static unsigned char eqdma = 0x8;
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static unsigned char pagereg = 0x83;
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static unsigned char dmareg = 2;
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static unsigned char dma_write = 0x49;
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static unsigned char dma_read = 0x45;
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static unsigned char dma_done = 2;
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static unsigned char mode = 0;
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static unsigned char mbits; /* map bits into each other */
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static long bufptr;
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static unsigned numbytes;
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/*
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_wci dw 0 ; interrupt chain finished normally
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_exflag dw 0 ; exception variable
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_bytes dw 0 ; current bytes
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eqdma db 8h ; enable dma command: ch1,ch2=8h, ch3=10h
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pagereg db 83h ; ch1=83h, ch2=81h, ch3=82h
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dmareg db 2 ; ch1=2, ch2=4, ch3=6
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dma_write db 49h ; write dma command: 48h+_wtchan
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dma_read db 45h ; read dma command: 44h+_wtchan
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dma_done db 2 ; dma done flag: 1<<_wtchan
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mode db 0 ; dma operation mode
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lbufptr dw 0 ; buffer pointer to data buffers, low word
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hbufptr dw 0 ; buffer pointer to data buffers, high word
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numbytes dw 0 ; number of bytes to read or write (new)
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*/
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#define PAGESIZ 4096
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#define HZ 60
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/* tape controller ports */
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#define STATPORT wtport
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#define CTLPORT STATPORT
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#define CMDPORT (wtport+1)
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#define DATAPORT CMDPORT
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/* defines for reading out status from wangtek tape controller */
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#define READY 0x01 /* ready bit define */
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#define EXCEP 0x02 /* exception bit define */
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#define STAT (READY|EXCEP)
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#define RESETMASK 0x7
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#define RESETVAL (RESETMASK & ~EXCEP)
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/* tape controller control bits (CTLPORT) */
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#define ONLINE 0x01
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#define RESET 0x02
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#define REQUEST 0x04 /* request command */
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#define CMDOFF 0xC0
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/* QIC-02 commands (CMDPORT) */
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#define RDDATA 0x80 /* read data */
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#define READFM 0xA0 /* read file mark */
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#define WRTDATA 0x40 /* write data */
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#define WRITEFM 0x60 /* write file mark */
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#define RDSTAT 0xC0 /* read status command */
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#define REWIND 0x21 /* rewind command (position+bot) */
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/* 8237 DMA controller regs */
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#define STATUSREG 0x8
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#define MASKREG 0xA
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#define MODEREG 0xB
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#define CLEARFF 0xC
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/* streamer tape block size */
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#define BLKSIZE 512
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/* Tape characteristics */
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#define NBPS 512 /* 512-byte blocks */
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#define ERROR 1 /* return from tape routines */
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#define SUCCESS 0 /* return from tape routines */
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/* Minor devs */
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#define TP_REWCLOSE(d) ((minor(d)&04) == 0) /* Rewind tape on close if read/write */
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#define TP_DENS(dev) ((minor(dev) >> 3) & 03) /* set density */
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#define TPHOG(d) 0 /* use Hogproc during tape I/O */
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/* defines for wtflags */
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#define TPINUSE 0x0001 /* tape is already open */
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#define TPREAD 0x0002 /* tape is only open for reading */
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#define TPWRITE 0x0004 /* tape is only open for writing */
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#define TPSTART 0x0008 /* tape must be rewound and reset */
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#define TPDEAD 0x0010 /* tape drive does not work or driver error */
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#define TPSESS 0x0020 /* no more reads or writes allowed in session */
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/* for example, when tape has to be changed */
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#define TPSTOP 0x0040 /* Stop command outstanding */
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#define TPREW 0x0080 /* Rewind command outstanding, see wtdsl2() */
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#define TPVOL 0x0100 /* Read file mark, or hit end of tape */
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#define TPWO 0x0200 /* write command outstanding */
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#define TPRO 0x0400 /* read command outstanding */
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#define TPWANY 0x0800 /* write command requested */
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#define TPRANY 0x1000 /* read command requested */
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#define TPWP 0x2000 /* write protect error seen */
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unsigned int wtflags = TPSTART; /* state of tape drive */
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struct buf rwtbuf; /* header for raw i/o */
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struct proc *myproc; /* process which opened tape driver */
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char wtimeron; /* wtimer() active flag */
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char wtio; /* dma (i/o) active flag */
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char isrlock; /* isr() flag */
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struct proc * Hogproc; /* no Hogproc on Microport */
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#define ftoseg(x) ((unsigned) (x >> 16))
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struct wtstatus {
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ushort wt_err; /* code for error encountered */
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ushort wt_ercnt; /* number of error blocks */
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ushort wt_urcnt; /* number of underruns */
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} wterror;
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/* defines for wtstatus.wt_err */
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#define TP_POR 0x100 /* Power on/reset occurred */
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#define TP_RES1 0x200 /* Reserved for end of media */
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#define TP_RES2 0x400 /* Reserved for bus parity */
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#define TP_BOM 0x800 /* Beginning of media */
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#define TP_MBD 0x1000 /* Marginal block detected */
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#define TP_NDT 0x2000 /* No data detected */
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#define TP_ILL 0x4000 /* Illegal command */
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#define TP_ST1 0x8000 /* Status byte 1 bits */
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#define TP_FIL 0x01 /* File mark detected */
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#define TP_BNL 0x02 /* Bad block not located */
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#define TP_UDA 0x04 /* Unrecoverable data error */
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#define TP_EOM 0x08 /* End of media */
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#define TP_WRP 0x10 /* Write protected cartridge */
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#define TP_USL 0x20 /* Unselected drive */
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#define TP_CNI 0x40 /* Cartridge not in place */
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#define TP_ST0 0x80 /* Status byte 0 bits */
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/* Grounds for reporting I/O error to user */
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#define TP_ERR0 (TP_BNL|TP_UDA|TP_WRP|TP_CNI|TP_FIL|TP_EOM|TP_USL)
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#define TP_ERR1 (TP_MBD|TP_NDT|TP_ILL)
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/* TP_ILL should never happen! */
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/*
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#define TP_ERR0 0x7f
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#define TP_ERR1 0x7700
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*/
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/* defines for reading out status from wangtek tape controller */
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#define READY 0x01 /* ready bit define */
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#define EXCEP 0x02 /* exception bit define */
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/* sleep priority */
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#define WTPRI (PZERO+10)
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char pagebuf[NBPS]; /* buffer of size NBPS */
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unsigned long pageaddr; /* physical addr of pagebuf */
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/* pageaddr is used with DMA controller */
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time_t Hogtime; /* lbolt when Hog timer started */
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extern time_t lbolt;
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#define debug printf
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/*
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* Strategy routine.
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*
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* Arguments:
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* Pointer to buffer structure
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* Function:
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* Start transfer.
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*
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* It would be nice to have this multiple-threaded.
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* There is a version of dump from Berkeley that works with multiple processes
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* trading off with disk & tape I/O.
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*/
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int
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wtstrategy(bp)
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register struct buf *bp;
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{
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unsigned ucnt1, ucnt2, finished;
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unsigned long adr1, adr2;
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int bad;
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adr1 = kvtop(bp->b_un.b_addr);
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#ifdef DEBUG
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debug("bpaddr %x\n", adr1);
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#endif
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ucnt1 = bp->b_bcount % NBPG;
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ucnt2 = 0;
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adr2 = 0;
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#ifdef DEBUG
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debug("WTstart: adr1 %lx cnt %x\n", adr1, ucnt1);
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#endif
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/* 64K boundary? (XXX) */
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if (ftoseg(adr1) != ftoseg(adr1 + (unsigned) ucnt1 - 1))
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{
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adr2 = (adr1 & 0xffff0000L) + 0x10000L;
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ucnt2 = (adr1 + ucnt1) - adr2;
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ucnt1 -= ucnt2;
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}
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/* page boundary? */
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if (trunc_page(adr1) != trunc_page(adr1 + (unsigned) ucnt1 - 1))
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{ unsigned u;
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u = NBPG - ((unsigned)bp->b_un.b_addr & (NBPG-1));
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adr2 = kvtop(bp->b_un.b_addr + u);
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ucnt2 = ucnt1 - u;
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ucnt1 = u;
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}
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/* at file marks and end of tape, we just return '0 bytes available' */
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if (wtflags & TPVOL) {
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bp->b_resid = bp->b_bcount;
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goto xit;
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}
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if ((Hogproc == (struct proc *) 0) && TPHOG(bp->b_dev))
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{
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#ifdef DEBUG
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printf("setting Hogproc\n");
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#endif
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Hogtime = 0;
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Hogproc = myproc;
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}
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if (bp->b_flags & B_READ) {
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bad = 0;
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/* For now, we assume that all data will be copied out */
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/* If read command outstanding, just skip down */
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if (!(wtflags & TPRO)) {
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if (ERROR == wtsense(TP_WRP)) /* clear status */
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goto errxit;
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#ifdef DEBUG
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debug("WTread: Start read\n");
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#endif
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if (!(wtflags & TPREAD) || (wtflags & TPWANY) ||
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(rstart() == ERROR)) {
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#ifdef DEBUG
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debug("Tpstart: read init error\n"); /* */
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#endif
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goto errxit;
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}
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wtflags |= TPRO|TPRANY;
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}
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finished = 0;
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/* Take a deep breath */
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if (ucnt1) {
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if ((rtape(adr1, ucnt1) == ERROR) &&
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(wtsense(TP_WRP) == ERROR))
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goto endio;
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/* wait for it */
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bad = pollrdy();
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finished = bytes;
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if (bad)
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goto endio;
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}
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/* if a second I/O region, start it */
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if (ucnt2) {
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if ((rtape(adr2, ucnt2) == ERROR) &&
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(wtsense(TP_WRP) == ERROR))
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ucnt2 = 0; /* don't poll for me */
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}
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/* if second i/o pending wait for it */
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if (ucnt2) {
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pollrdy();
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/* whether pollrdy is ok or not */
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finished += bytes;
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}
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} else {
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if (wtflags & TPWP) /* write protected */
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goto errxit;
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/* If write command outstanding, just skip down */
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if (!(wtflags & TPWO)) {
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if (ERROR == wtsense(0)) /* clear status */
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{
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#ifdef DEBUG
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debug("TPstart: sense 0\n");
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#endif
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goto errxit;
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}
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if (!(wtflags & TPWRITE) || (wtflags & TPRANY) ||
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(wstart() == ERROR)) {
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#ifdef DEBUG
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debug("Tpstart: write init error\n"); /* */
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#endif
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wtsense(0);
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errxit: bp->b_flags |= B_ERROR;
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bp->b_resid = bp->b_bcount;
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goto xit;
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}
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wtflags |= TPWO|TPWANY;
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}
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/* and hold your nose */
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if (ucnt1 && ((wtape(adr1, ucnt1) == ERROR)
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&& (wtsense(0) == ERROR)))
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finished = bytes;
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else if (ucnt2 &&
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(((ucnt1 && pollrdy()) ||
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(wtape(adr2, ucnt2) == ERROR)) &&
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(wtsense(0) == ERROR)))
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finished = ucnt1 + NBPS + bytes;
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/* All writes and/or copyins were fine! */
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else
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finished = bp->b_bcount;
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bad = pollrdy();
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}
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endio:
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if(bad == EIO) bad = 0;
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wterror.wt_err = 0;
|
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if (exflag && wtsense((bp->b_flags & B_READ) ? TP_WRP : 0)) {
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if ((wterror.wt_err & TP_ST0)
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&& (wterror.wt_err & (TP_FIL|TP_EOM))) {
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#ifdef DEBUG
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debug("WTsta: Hit end of tape\n"); /* */
|
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#endif
|
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wtflags |= TPVOL;
|
|
if (wterror.wt_err & TP_FIL) {
|
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if (wtflags & TPRO)
|
|
/* interrupter is bogus */
|
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rstart(); /* restart read command */
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else
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wtflags &= ~TPWO;
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finished += NBPS;
|
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}
|
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/* Reading file marks or writing end of tape return 0 bytes */
|
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} else {
|
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bp->b_flags |= B_ERROR;
|
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wtflags &= ~(TPWO|TPRO);
|
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}
|
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}
|
|
|
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if(bad) {
|
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bp->b_flags |= B_ERROR;
|
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bp->b_error = bad;
|
|
}
|
|
bp->b_resid = bp->b_bcount - finished;
|
|
xit:
|
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biodone(bp);
|
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if (wtimeron)
|
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Hogtime = lbolt;
|
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else if (Hogproc == myproc)
|
|
Hogproc = (struct proc *) 0;
|
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}
|
|
|
|
/*
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|
* simulate an interrupt periodically while I/O is going
|
|
* this is necessary in case interrupts get eaten due to
|
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* multiple devices on a single IRQ line
|
|
*/
|
|
wtimer()
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|
{
|
|
/* If I/O going and not in isr(), simulate interrupt
|
|
* If no I/O for at least 1 second, stop being a Hog
|
|
* If I/O done and not a Hog, turn off wtimer()
|
|
*/
|
|
if (wtio && !isrlock)
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isr();
|
|
|
|
if ((Hogproc == myproc) && Hogtime && (lbolt-Hogtime > HZ))
|
|
Hogproc = (struct proc *) 0;
|
|
|
|
if (wtio || (Hogproc == myproc))
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timeout(wtimer, (caddr_t) 0, HZ);
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else
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wtimeron = 0;
|
|
}
|
|
|
|
|
|
wtrawio(bp)
|
|
struct buf *bp;
|
|
{
|
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wtstrategy(bp);
|
|
biowait(bp);
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|
return(0);
|
|
}
|
|
|
|
/*
|
|
* ioctl routine
|
|
* for user level QIC commands only
|
|
*/
|
|
wtioctl(dev, cmd, arg, mode)
|
|
int dev, cmd;
|
|
unsigned long arg;
|
|
int mode;
|
|
{
|
|
if (cmd == WTQICMD)
|
|
{
|
|
if ((qicmd((int)arg) == ERROR) || (rdyexc(HZ) == ERROR))
|
|
{
|
|
wtsense(0);
|
|
return(EIO);
|
|
}
|
|
return(0);
|
|
}
|
|
return(EINVAL);
|
|
}
|
|
|
|
/*
|
|
* open routine
|
|
* called on every device open
|
|
*/
|
|
wtopen(dev, flag)
|
|
int dev, flag;
|
|
{
|
|
if (first_wtopen_ever) {
|
|
wtinit();
|
|
first_wtopen_ever = 0;
|
|
}
|
|
#ifdef DEBUG
|
|
printf("wtopen ...\n");
|
|
#endif
|
|
if (!pageaddr) {
|
|
return(ENXIO);
|
|
}
|
|
if (wtflags & (TPINUSE)) {
|
|
return(ENXIO);
|
|
}
|
|
if (wtflags & (TPDEAD)) {
|
|
return(EIO);
|
|
}
|
|
/* If a rewind from the last session is going on, wait */
|
|
while(wtflags & TPREW) {
|
|
#ifdef DEBUG
|
|
debug("Waiting for rew to finish\n");
|
|
#endif
|
|
DELAY(1000000); /* delay one second */
|
|
}
|
|
/* Only do reset and select when tape light is off, and tape is rewound.
|
|
* This allows multiple volumes. */
|
|
if (wtflags & TPSTART) {
|
|
if (t_reset() != SUCCESS) {
|
|
return(ENXIO);
|
|
}
|
|
#ifdef DEBUG
|
|
debug("reset done. calling wtsense\n");
|
|
#endif
|
|
if (wtsense(TP_WRP) == ERROR) {
|
|
return (EIO);
|
|
}
|
|
#ifdef DEBUG
|
|
debug("wtsense done\n");
|
|
#endif
|
|
wtflags &= ~TPSTART;
|
|
}
|
|
|
|
wtflags = TPINUSE;
|
|
if (flag & FREAD)
|
|
wtflags |= TPREAD;
|
|
if (flag & FWRITE)
|
|
wtflags |= TPWRITE;
|
|
rwtbuf.b_flags = 0;
|
|
myproc = curproc; /* for comparison */
|
|
#ifdef not
|
|
switch(TP_DENS(dev)) {
|
|
case 0:
|
|
cmds(0x28);
|
|
break;
|
|
case 1:
|
|
cmds(0x29);
|
|
break;
|
|
case 2:
|
|
cmds(0x27);
|
|
break;
|
|
case 3:
|
|
cmds(0x24);
|
|
}
|
|
#endif
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* close routine
|
|
* called on last device close
|
|
* If not rewind-on-close, leave read or write command intact.
|
|
*/
|
|
wtclose(dev)
|
|
{
|
|
int wtdsl2();
|
|
|
|
#ifdef DEBUG
|
|
debug("WTclose:\n");
|
|
#endif
|
|
if (Hogproc == myproc)
|
|
Hogproc = (struct proc *) 0;
|
|
if (!exflag && (wtflags & TPWANY) && !(wtflags & (TPSESS|TPDEAD))) {
|
|
if (!(wtflags & TPWO))
|
|
wstart();
|
|
#ifdef DEBUG
|
|
debug("WT: Writing file mark\n");
|
|
#endif
|
|
wmark(); /* write file mark */
|
|
#ifdef DEBUG
|
|
debug("WT: Wrote file mark, going to wait\n");
|
|
#endif
|
|
if (rdyexc(HZ/10) == ERROR) {
|
|
wtsense(0);
|
|
}
|
|
}
|
|
if (TP_REWCLOSE(dev) || (wtflags & (TPSESS|TPDEAD))) {
|
|
/* rewind tape to beginning of tape, deselect tape, and make a note */
|
|
/* don't wait until rewind, though */
|
|
/* Ending read or write causes rewind to happen, if no error,
|
|
* and READY and EXCEPTION stay up until it finishes */
|
|
if (wtflags & (TPRO|TPWO))
|
|
{
|
|
#ifdef DEBUG
|
|
debug("End read or write\n");
|
|
#endif
|
|
rdyexc(HZ/10);
|
|
ioend();
|
|
wtflags &= ~(TPRO|TPWO);
|
|
}
|
|
else wtwind();
|
|
wtflags |= TPSTART | TPREW;
|
|
timeout(wtdsl2, 0, HZ);
|
|
}
|
|
else if (!(wtflags & (TPVOL|TPWANY)))
|
|
{
|
|
/* space forward to after next file mark no writing done */
|
|
/* This allows skipping data without reading it.*/
|
|
#ifdef DEBUG
|
|
debug("Reading past file mark\n");
|
|
#endif
|
|
if (!(wtflags & TPRO))
|
|
rstart();
|
|
rmark();
|
|
if (rdyexc(HZ/10))
|
|
{
|
|
wtsense(TP_WRP);
|
|
}
|
|
}
|
|
wtflags &= TPREW|TPDEAD|TPSTART|TPRO|TPWO;
|
|
return(0);
|
|
}
|
|
|
|
/* return ERROR if user I/O request should receive an I/O error code */
|
|
|
|
wtsense(ignor)
|
|
{
|
|
wtflags &= ~(TPRO|TPWO);
|
|
#ifdef DEBUGx
|
|
debug("WTsense: start ");
|
|
#endif
|
|
if (rdstatus(&wterror) == ERROR)
|
|
{
|
|
#ifdef DEBUG
|
|
debug("WTsense: Can't read status\n");
|
|
#endif
|
|
return(ERROR);
|
|
}
|
|
#ifdef DEBUG
|
|
if (wterror.wt_err & (TP_ST0|TP_ST1))
|
|
{
|
|
debug("Tperror: status %x error %d underruns %d\n",
|
|
wterror.wt_err, wterror.wt_ercnt, wterror.wt_urcnt);
|
|
}
|
|
else
|
|
debug("done. no error\n");
|
|
#endif
|
|
wterror.wt_err &= ~ignor; /* ignore certain errors */
|
|
reperr(wterror.wt_err);
|
|
if (((wterror.wt_err & TP_ST0) && (wterror.wt_err & TP_ERR0)) ||
|
|
((wterror.wt_err & TP_ST1) && (wterror.wt_err & TP_ERR1)))
|
|
return ERROR;
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/* lifted from tdriver.c from Wangtek */
|
|
reperr(srb0)
|
|
int srb0;
|
|
{
|
|
int s0 = srb0 & (TP_ERR0|TP_ERR1); /* find out which exception to report */
|
|
|
|
if (s0) {
|
|
if (s0 & TP_USL)
|
|
sterr("Drive not online");
|
|
else if (s0 & TP_CNI)
|
|
sterr("No cartridge");
|
|
else if ((s0 & TP_WRP) && !(wtflags & TPWP))
|
|
{
|
|
sterr("Tape is write protected");
|
|
wtflags |= TPWP;
|
|
}
|
|
/*
|
|
if (s0 & TP_FIL)
|
|
sterr("Filemark detected");
|
|
*/
|
|
else if (s0 & TP_BNL)
|
|
sterr("Block in error not located");
|
|
else if (s0 & TP_UDA)
|
|
sterr("Unrecoverable data error");
|
|
/*
|
|
else if (s0 & TP_EOM)
|
|
sterr("End of tape");
|
|
*/
|
|
else if (s0 & TP_NDT)
|
|
sterr("No data detected");
|
|
/*
|
|
if (s0 & TP_POR)
|
|
sterr("Reset occured");
|
|
*/
|
|
else if (s0 & TP_BOM)
|
|
sterr("Beginning of tape");
|
|
else if (s0 & TP_ILL)
|
|
sterr("Illegal command");
|
|
}
|
|
}
|
|
|
|
sterr(errstr)
|
|
char *errstr;
|
|
{
|
|
printf("Streamer: %s\n", errstr);
|
|
}
|
|
|
|
/* Wait until rewind finishes, and deselect drive */
|
|
wtdsl2() {
|
|
int stat;
|
|
|
|
stat = inb(wtport) & (READY|EXCEP);
|
|
#ifdef DEBUG
|
|
debug("Timeout: Waiting for rewind to finish: stat %x\n", stat);
|
|
#endif
|
|
switch (stat) {
|
|
/* They're active low, ya'know */
|
|
case READY|EXCEP:
|
|
timeout(wtdsl2, (caddr_t) 0, HZ);
|
|
return;
|
|
case EXCEP:
|
|
wtflags &= ~TPREW;
|
|
return;
|
|
case READY:
|
|
case 0:
|
|
wtflags &= ~TPREW;
|
|
sterr("Rewind failed");
|
|
wtsense(TP_WRP);
|
|
return;
|
|
}
|
|
}
|
|
|
|
wtwind() {
|
|
#ifdef DEBUG
|
|
debug("WT: About to rewind\n");
|
|
#endif
|
|
rwind(); /* actually start rewind */
|
|
}
|
|
|
|
wtintr(unit) {
|
|
if (wtflags & (TPWO|TPRO))
|
|
{
|
|
isrlock = 1;
|
|
if (wtio) isr();
|
|
isrlock = 0;
|
|
}
|
|
}
|
|
|
|
wtinit() {
|
|
if (wtchan < 1 || wtchan > 3)
|
|
{
|
|
sterr("Bad DMA channel, cannot init driver");
|
|
return;
|
|
}
|
|
wtlinit(); /* init assembly language variables */
|
|
pageset();
|
|
}
|
|
|
|
rdyexc(ticks)
|
|
{
|
|
int s;
|
|
#ifdef DEBUG
|
|
int os = 0xffff; /* force printout first time */
|
|
#endif
|
|
for (;;) { /* loop until ready or exception */
|
|
s=(inb(wtport) & 0xff); /* read the status register */
|
|
#ifdef DEBUG
|
|
if (os != s) {
|
|
debug("Status reg = %x\n", s); /* */
|
|
os = s;
|
|
}
|
|
#endif
|
|
if (!(s & EXCEP)) /* check if exception have occured */
|
|
break;
|
|
if (!(s & READY)) /* check if controller is ready */
|
|
break;
|
|
s = splbio();
|
|
DELAY((ticks/HZ)*1000000); /* */
|
|
splx(s);
|
|
}
|
|
#ifdef DEBUG
|
|
debug("Status reg = %x on return\n", s); /* */
|
|
#endif
|
|
return((s & EXCEP)?SUCCESS:ERROR); /* return exception if it occured */
|
|
}
|
|
|
|
pollrdy()
|
|
{
|
|
int sps;
|
|
#ifdef DEBUG
|
|
debug("Pollrdy\n");
|
|
#endif
|
|
sps = splbio();
|
|
while (wtio) {
|
|
int error;
|
|
|
|
if (error = tsleep((caddr_t)&wci, WTPRI | PCATCH,
|
|
"wtpoll", 0)) {
|
|
splx(sps);
|
|
return(error);
|
|
}
|
|
}
|
|
splx(sps);
|
|
#ifdef DEBUG
|
|
debug("Finish poll, wci %d exflag %d\n", wci, exflag);
|
|
#endif
|
|
return (EIO);
|
|
}
|
|
|
|
wtdma() /* start up i/o operation, called from dma() in wtlib1.s */
|
|
{
|
|
wtio = 1;
|
|
if (!wtimeron)
|
|
{
|
|
wtimeron = 1;
|
|
timeout(wtimer, (caddr_t) 0, HZ/2);
|
|
}
|
|
}
|
|
|
|
wtwake() /* end i/o operation, called from isr() in wtlib1.s */
|
|
{
|
|
wtio = 0;
|
|
wakeup(&wci);
|
|
}
|
|
|
|
pageset()
|
|
{
|
|
unsigned long pp;
|
|
|
|
pp = (unsigned long) pagebuf;
|
|
pageaddr = kvtop(pp);
|
|
#ifdef DEBUG
|
|
debug("pageset: addr %lx\n", pageaddr);
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
#define near
|
|
|
|
static near
|
|
sendcmd()
|
|
{
|
|
/* desired command in global mbits */
|
|
|
|
outb(CTLPORT, mbits | REQUEST); /* set request */
|
|
while (inb(STATPORT) & READY); /* wait for ready */
|
|
outb(CTLPORT, mbits & ~REQUEST); /* reset request */
|
|
while ((inb(STATPORT) & READY) == 0); /* wait for not ready */
|
|
}
|
|
|
|
static near /* execute command */
|
|
cmds(cmd)
|
|
{
|
|
register s;
|
|
|
|
do s = inb(STATPORT);
|
|
while ((s & STAT) == STAT); /* wait for ready */
|
|
|
|
if ((s & EXCEP) == 0) /* if exception */
|
|
return ERROR; /* error */
|
|
|
|
outb(CMDPORT, cmd); /* output the command */
|
|
|
|
outb(CTLPORT, mbits=ONLINE); /* set & send ONLINE */
|
|
sendcmd();
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
qicmd(cmd)
|
|
{
|
|
return cmds(cmd);
|
|
}
|
|
|
|
rstart()
|
|
{
|
|
return cmds(RDDATA);
|
|
}
|
|
|
|
rmark()
|
|
{
|
|
return cmds(READFM);
|
|
}
|
|
|
|
wstart()
|
|
{
|
|
return cmds(WRTDATA);
|
|
}
|
|
|
|
ioend()
|
|
{
|
|
register s;
|
|
register rval = SUCCESS;
|
|
|
|
do s = inb(STATPORT);
|
|
while ((s & STAT) == STAT); /* wait for ready */
|
|
|
|
if ((s & EXCEP) == 0) /* if exception */
|
|
rval = ERROR; /* error */
|
|
|
|
mbits &= ~ONLINE;
|
|
outb(CTLPORT, mbits); /* reset ONLINE */
|
|
outb(MASKREG, wtchan+4); /* turn off dma */
|
|
outb(CLEARFF, 0); /* reset direction flag */
|
|
|
|
return rval;
|
|
}
|
|
|
|
wmark()
|
|
{
|
|
register s;
|
|
|
|
if (cmds(WRITEFM) == ERROR)
|
|
return ERROR;
|
|
|
|
do s = inb(STATPORT);
|
|
while ((s & STAT) == STAT); /* wait for ready */
|
|
|
|
if ((s & EXCEP) == 0) /* if exception */
|
|
return ERROR; /* error */
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
rwind()
|
|
{
|
|
register s;
|
|
|
|
mbits = CMDOFF;
|
|
|
|
do s = inb(STATPORT);
|
|
while ((s & STAT) == STAT); /* wait for ready */
|
|
|
|
outb(CMDPORT, REWIND);
|
|
sendcmd();
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
rdstatus(stp)
|
|
char *stp; /* pointer to 6 byte buffer */
|
|
{
|
|
register s;
|
|
int n;
|
|
|
|
do s = inb(STATPORT);
|
|
while ((s & STAT) == STAT); /* wait for ready or exception */
|
|
|
|
outb(CMDPORT, RDSTAT);
|
|
sendcmd(); /* send read status command */
|
|
|
|
for (n=0; n<6; n++)
|
|
{
|
|
#ifdef DEBUGx
|
|
debug("rdstatus: waiting, byte %d\n", n);
|
|
#endif
|
|
do s = inb(STATPORT);
|
|
while ((s & STAT) == STAT); /* wait for ready */
|
|
#ifdef DEBUGx
|
|
debug("rdstatus: done\n");
|
|
#endif
|
|
if ((s & EXCEP) == 0) /* if exception */
|
|
return ERROR; /* error */
|
|
|
|
*stp++ = inb(DATAPORT); /* read status byte */
|
|
|
|
outb(CTLPORT, mbits | REQUEST); /* set request */
|
|
#ifdef DEBUGx
|
|
debug("rdstatus: waiting after request, byte %d\n", n);
|
|
#endif
|
|
while ((inb(STATPORT)&READY) == 0); /* wait for not ready */
|
|
for (s=100; s>0; s--); /* wait an additional time */
|
|
|
|
outb(CTLPORT, mbits & ~REQUEST);/* unset request */
|
|
#ifdef DEBUGx
|
|
debug("rdstatus: done\n");
|
|
#endif
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
t_reset()
|
|
{
|
|
register i;
|
|
mbits |= RESET;
|
|
outb(CTLPORT, mbits); /* send reset */
|
|
DELAY(20);
|
|
mbits &= ~RESET;
|
|
outb(CTLPORT, mbits); /* turn off reset */
|
|
if ((inb(STATPORT) & RESETMASK) == RESETVAL)
|
|
return SUCCESS;
|
|
return ERROR;
|
|
}
|
|
|
|
static
|
|
dma()
|
|
{
|
|
int x=splbio();
|
|
wtdma();
|
|
outb(CLEARFF, 0);
|
|
outb(MODEREG, mode); /* set dma mode */
|
|
outb(dmareg, bufptr & 0xFF);
|
|
outb(dmareg, (bufptr>>8) & 0xFF);
|
|
outb(pagereg, (bufptr>>16) & 0xFF);
|
|
outb(dmareg+1, (BLKSIZE-1) & 0xFF);
|
|
outb(dmareg+1, (BLKSIZE-1) >> 8);
|
|
outb(wtport, eqdma+ONLINE);
|
|
outb(MASKREG, wtchan); /* enable command to 8237, start dma */
|
|
splx(x);
|
|
}
|
|
|
|
static near
|
|
wtstart(buf, cnt)
|
|
long buf;
|
|
int cnt;
|
|
{
|
|
register s;
|
|
|
|
bufptr = buf; /* init statics */
|
|
numbytes = cnt;
|
|
wci = 0; /* init flags */
|
|
exflag = 0;
|
|
bytes = 0; /* init counter */
|
|
|
|
do s = inb(STATPORT) & STAT;
|
|
while (s == STAT); /* wait for ready or error */
|
|
|
|
if (s & EXCEP) /* no error */
|
|
{
|
|
dma();
|
|
return SUCCESS;
|
|
}
|
|
return ERROR; /* error */
|
|
}
|
|
|
|
rtape(buf, cnt)
|
|
long buf; /* physical address */
|
|
int cnt; /* number of bytes */
|
|
{
|
|
mode = dma_read;
|
|
return wtstart(buf,cnt);
|
|
}
|
|
|
|
wtape(buf, cnt)
|
|
long buf; /* physical address */
|
|
int cnt; /* number of bytes */
|
|
{
|
|
mode = dma_write;
|
|
return wtstart(buf,cnt);
|
|
}
|
|
|
|
isr()
|
|
{
|
|
int stat = inb(wtport);
|
|
if (!(stat & EXCEP)) /* exception during I/O */
|
|
{
|
|
if (bytes + BLKSIZE >= numbytes) wci = 1;
|
|
exflag = 1;
|
|
goto isrwake;
|
|
}
|
|
if ((stat & READY) || !(inb(STATUSREG) & dma_done))
|
|
return;
|
|
exflag = 0;
|
|
outb(wtport, ONLINE);
|
|
bytes += BLKSIZE;
|
|
if (bytes >= numbytes) /* normal completion of I/O */
|
|
{
|
|
wci = 1;
|
|
isrwake:
|
|
outb(MASKREG, 4+wtchan); /* turn off dma */
|
|
wtwake(); /* wake up user level */
|
|
}
|
|
else
|
|
{ /* continue I/O */
|
|
bufptr += BLKSIZE;
|
|
dma();
|
|
}
|
|
}
|
|
|
|
wtlinit()
|
|
{
|
|
switch (wtchan) {
|
|
case 1:
|
|
return;
|
|
case 2:
|
|
pagereg = 0x81;
|
|
dma_done = 4;
|
|
break;
|
|
case 3:
|
|
eqdma = 0x10;
|
|
pagereg = 0x82;
|
|
dma_done = 8;
|
|
break;
|
|
}
|
|
dma_write = wtchan+0x48;
|
|
dma_read = wtchan+0x44;
|
|
dmareg = wtchan+wtchan;
|
|
}
|
|
|
|
wtsize()
|
|
{
|
|
}
|
|
|
|
wtdump()
|
|
{
|
|
}
|
|
|
|
#include "i386/isa/isa_device.h"
|
|
#include "i386/isa/icu.h"
|
|
|
|
int wtprobe(), wtattach();
|
|
struct isa_driver wtdriver = {
|
|
wtprobe, wtattach, "wt",
|
|
};
|
|
|
|
wtprobe(dvp)
|
|
struct isa_device *dvp;
|
|
{
|
|
int val,i,s;
|
|
|
|
#ifdef lint
|
|
wtintr(0);
|
|
#endif
|
|
|
|
wtport = dvp->id_iobase;
|
|
if(t_reset() != SUCCESS) return(0);
|
|
return(1);
|
|
}
|
|
|
|
wtattach() { }
|
|
|
|
#endif NWT
|