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1001 lines
27 KiB
C
1001 lines
27 KiB
C
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/*
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* Streamer tape driver for 386bsd and FreeBSD.
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* Supports Archive and Wangtek compatible QIC-02/QIC-36 boards.
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*
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* Copyright (C) 1993 by:
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* Sergey Ryzhkov <sir@kiae.su>
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* Serge Vakulenko <vak@zebub.msk.su>
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*
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* This software is distributed with NO WARRANTIES, not even the implied
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* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Authors grant any other persons or organisations permission to use
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* or modify this software as long as this message is kept with the software,
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* all derivative works or modified versions.
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*
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* This driver is derived from the old 386bsd Wangtek streamer tape driver,
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* made by Robert Baron at CMU, based on Intel sources.
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* Authors thank Robert Baron, CMU and Intel and retain here
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* the original CMU copyright notice.
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*
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* Version 1.3, Thu Nov 11 12:09:13 MSK 1993
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* $Id: wt.c,v 1.41 1997/08/25 23:31:05 bde Exp $
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*
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*/
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/*
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* Code for MTERASE added by John Lind (john@starfire.mn.org) 95/09/02.
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* This was very easy due to the excellent structure and clear coding
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* of the original driver.
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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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/mtio.h>
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#include <sys/conf.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <machine/clock.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/wtreg.h>
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/*
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* Uncomment this to enable internal device tracing.
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*/
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#define TRACE(s) /* printf s */
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#define WTPRI (PZERO+10) /* sleep priority */
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/*
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* Wangtek controller ports
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*/
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#define WT_CTLPORT(base) ((base)+0) /* control, write only */
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#define WT_STATPORT(base) ((base)+0) /* status, read only */
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#define WT_CMDPORT(base) ((base)+1) /* command, write only */
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#define WT_DATAPORT(base) ((base)+1) /* data, read only */
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#define WT_NPORT 2 /* 2 i/o ports */
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/* status port bits */
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#define WT_BUSY 0x01 /* not ready bit define */
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#define WT_NOEXCEP 0x02 /* no exception bit define */
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#define WT_RESETMASK 0x07 /* to check after reset */
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#define WT_RESETVAL 0x05 /* state after reset */
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/* control port bits */
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#define WT_ONLINE 0x01 /* device selected */
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#define WT_RESET 0x02 /* reset command */
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#define WT_REQUEST 0x04 /* request command */
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#define WT_IEN 0x08 /* enable dma */
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/*
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* Archive controller ports
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*/
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#define AV_DATAPORT(base) ((base)+0) /* data, read only */
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#define AV_CMDPORT(base) ((base)+0) /* command, write only */
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#define AV_STATPORT(base) ((base)+1) /* status, read only */
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#define AV_CTLPORT(base) ((base)+1) /* control, write only */
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#define AV_SDMAPORT(base) ((base)+2) /* start dma */
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#define AV_RDMAPORT(base) ((base)+3) /* reset dma */
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#define AV_NPORT 4 /* 4 i/o ports */
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/* status port bits */
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#define AV_BUSY 0x40 /* not ready bit define */
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#define AV_NOEXCEP 0x20 /* no exception bit define */
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#define AV_RESETMASK 0xf8 /* to check after reset */
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#define AV_RESETVAL 0x50 /* state after reset */
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/* control port bits */
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#define AV_RESET 0x80 /* reset command */
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#define AV_REQUEST 0x40 /* request command */
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#define AV_IEN 0x20 /* enable interrupts */
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enum wttype {
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UNKNOWN = 0, /* unknown type, driver disabled */
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ARCHIVE, /* Archive Viper SC499, SC402 etc */
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WANGTEK /* Wangtek */
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};
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typedef struct {
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unsigned short err; /* code for error encountered */
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unsigned short ercnt; /* number of error blocks */
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unsigned short urcnt; /* number of underruns */
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} wtstatus_t;
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typedef struct {
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enum wttype type; /* type of controller */
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unsigned unit; /* unit number */
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unsigned port; /* base i/o port */
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unsigned chan; /* dma channel number, 1..3 */
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unsigned flags; /* state of tape drive */
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unsigned dens; /* tape density */
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int bsize; /* tape block size */
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void *buf; /* internal i/o buffer */
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void *dmavaddr; /* virtual address of dma i/o buffer */
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unsigned dmatotal; /* size of i/o buffer */
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unsigned dmaflags; /* i/o direction, B_READ or B_WRITE */
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unsigned dmacount; /* resulting length of dma i/o */
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wtstatus_t error; /* status of controller */
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unsigned short DATAPORT, CMDPORT, STATPORT, CTLPORT, SDMAPORT, RDMAPORT;
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unsigned char BUSY, NOEXCEP, RESETMASK, RESETVAL;
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unsigned char ONLINE, RESET, REQUEST, IEN;
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#ifdef DEVFS
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void *devfs_token;
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void *devfs_token_r;
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#endif
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} wtinfo_t;
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static wtinfo_t wttab[NWT]; /* tape info by unit number */
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static int wtwait (wtinfo_t *t, int catch, char *msg);
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static int wtcmd (wtinfo_t *t, int cmd);
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static int wtstart (wtinfo_t *t, unsigned mode, void *vaddr, unsigned len);
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static void wtdma (wtinfo_t *t);
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static timeout_t wtimer;
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static void wtclock (wtinfo_t *t);
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static int wtreset (wtinfo_t *t);
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static int wtsense (wtinfo_t *t, int verb, int ignor);
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static int wtstatus (wtinfo_t *t);
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static void wtrewind (wtinfo_t *t);
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static int wtreadfm (wtinfo_t *t);
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static int wtwritefm (wtinfo_t *t);
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static int wtpoll (wtinfo_t *t, int mask, int bits);
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static d_open_t wtopen;
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static d_close_t wtclose;
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static d_ioctl_t wtioctl;
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static d_dump_t wtdump;
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static d_psize_t wtsize;
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static d_strategy_t wtstrategy;
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#define CDEV_MAJOR 10
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#define BDEV_MAJOR 3
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static struct cdevsw wt_cdevsw;
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static struct bdevsw wt_bdevsw =
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{ wtopen, wtclose, wtstrategy, wtioctl, /*3*/
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wtdump, wtsize, B_TAPE, "wt", &wt_cdevsw, -1 };
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/*
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* Probe for the presence of the device.
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*/
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static int
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wtprobe (struct isa_device *id)
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{
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wtinfo_t *t = wttab + id->id_unit;
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t->unit = id->id_unit;
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t->chan = id->id_drq;
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t->port = id->id_iobase;
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if (t->chan<1 || t->chan>3) {
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printf ("wt%d: Bad drq=%d, should be 1..3\n", t->unit, t->chan);
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return (0);
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}
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/* Try Wangtek. */
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t->type = WANGTEK;
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t->CTLPORT = WT_CTLPORT (t->port); t->STATPORT = WT_STATPORT (t->port);
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t->CMDPORT = WT_CMDPORT (t->port); t->DATAPORT = WT_DATAPORT (t->port);
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t->SDMAPORT = 0; t->RDMAPORT = 0;
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t->BUSY = WT_BUSY; t->NOEXCEP = WT_NOEXCEP;
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t->RESETMASK = WT_RESETMASK; t->RESETVAL = WT_RESETVAL;
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t->ONLINE = WT_ONLINE; t->RESET = WT_RESET;
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t->REQUEST = WT_REQUEST; t->IEN = WT_IEN;
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if (wtreset (t))
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return (WT_NPORT);
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/* Try Archive. */
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t->type = ARCHIVE;
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t->CTLPORT = AV_CTLPORT (t->port); t->STATPORT = AV_STATPORT (t->port);
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t->CMDPORT = AV_CMDPORT (t->port); t->DATAPORT = AV_DATAPORT (t->port);
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t->SDMAPORT = AV_SDMAPORT (t->port); t->RDMAPORT = AV_RDMAPORT (t->port);
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t->BUSY = AV_BUSY; t->NOEXCEP = AV_NOEXCEP;
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t->RESETMASK = AV_RESETMASK; t->RESETVAL = AV_RESETVAL;
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t->ONLINE = 0; t->RESET = AV_RESET;
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t->REQUEST = AV_REQUEST; t->IEN = AV_IEN;
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if (wtreset (t))
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return (AV_NPORT);
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/* Tape controller not found. */
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t->type = UNKNOWN;
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return (0);
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}
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/*
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* Device is found, configure it.
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*/
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static int
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wtattach (struct isa_device *id)
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{
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wtinfo_t *t = wttab + id->id_unit;
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if (t->type == ARCHIVE) {
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printf ("wt%d: type <Archive>\n", t->unit);
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outb (t->RDMAPORT, 0); /* reset dma */
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} else
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printf ("wt%d: type <Wangtek>\n", t->unit);
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t->flags = TPSTART; /* tape is rewound */
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t->dens = -1; /* unknown density */
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isa_dmainit(t->chan, 1024);
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#ifdef DEVFS
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t->devfs_token_r =
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devfs_add_devswf(&wt_cdevsw, id->id_unit, DV_CHR, 0, 0,
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0600, "rwt%d", id->id_unit);
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t->devfs_token =
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devfs_add_devswf(&wt_bdevsw, id->id_unit, DV_BLK, 0, 0,
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0600, "wt%d", id->id_unit);
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#endif
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return (1);
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}
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struct isa_driver wtdriver = { wtprobe, wtattach, "wt", };
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int
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wtdump (dev_t dev)
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{
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/* Not implemented */
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return (EINVAL);
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}
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int
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wtsize (dev_t dev)
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{
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/* Not implemented */
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return (-1);
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}
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/*
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* Open routine, called on every device open.
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*/
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int
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wtopen (dev_t dev, int flag, int fmt, struct proc *p)
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{
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int u = minor (dev) & T_UNIT;
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wtinfo_t *t = wttab + u;
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int error;
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if (u >= NWT || t->type == UNKNOWN)
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return (ENXIO);
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/* Check that device is not in use */
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if (t->flags & TPINUSE)
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return (EBUSY);
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/* If the tape is in rewound state, check the status and set density. */
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if (t->flags & TPSTART) {
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/* If rewind is going on, wait */
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if (error = wtwait (t, PCATCH, "wtrew"))
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return (error);
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/* Check the controller status */
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if (! wtsense (t, 0, (flag & FWRITE) ? 0 : TP_WRP)) {
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/* Bad status, reset the controller */
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if (! wtreset (t))
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return (EIO);
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if (! wtsense (t, 1, (flag & FWRITE) ? 0 : TP_WRP))
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return (EIO);
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}
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/* Set up tape density. */
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if (t->dens != (minor (dev) & WT_DENSEL)) {
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int d = 0;
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switch (minor (dev) & WT_DENSEL) {
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case WT_DENSDFLT: default: break; /* default density */
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case WT_QIC11: d = QIC_FMT11; break; /* minor 010 */
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case WT_QIC24: d = QIC_FMT24; break; /* minor 020 */
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case WT_QIC120: d = QIC_FMT120; break; /* minor 030 */
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case WT_QIC150: d = QIC_FMT150; break; /* minor 040 */
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case WT_QIC300: d = QIC_FMT300; break; /* minor 050 */
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case WT_QIC600: d = QIC_FMT600; break; /* minor 060 */
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}
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if (d) {
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/* Change tape density. */
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if (! wtcmd (t, d))
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return (EIO);
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if (! wtsense (t, 1, TP_WRP | TP_ILL))
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return (EIO);
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/* Check the status of the controller. */
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if (t->error.err & TP_ILL) {
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printf ("wt%d: invalid tape density\n", t->unit);
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return (ENODEV);
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}
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}
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t->dens = minor (dev) & WT_DENSEL;
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}
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t->flags &= ~TPSTART;
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} else if (t->dens != (minor (dev) & WT_DENSEL))
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return (ENXIO);
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t->bsize = (minor (dev) & WT_BSIZE) ? 1024 : 512;
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t->buf = malloc (t->bsize, M_TEMP, M_WAITOK);
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if (! t->buf)
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return (EAGAIN);
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if (isa_dma_acquire(t->chan))
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return(EBUSY);
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t->flags = TPINUSE;
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if (flag & FREAD)
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t->flags |= TPREAD;
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if (flag & FWRITE)
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t->flags |= TPWRITE;
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return (0);
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}
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/*
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* Close routine, called on last device close.
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*/
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int
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wtclose (dev_t dev, int flags, int fmt, struct proc *p)
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{
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int u = minor (dev) & T_UNIT;
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wtinfo_t *t = wttab + u;
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if (u >= NWT || t->type == UNKNOWN)
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return (ENXIO);
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/* If rewind is pending, do nothing */
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if (t->flags & TPREW)
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goto done;
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/* If seek forward is pending and no rewind on close, do nothing */
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if (t->flags & TPRMARK) {
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if (minor (dev) & T_NOREWIND)
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goto done;
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/* If read file mark is going on, wait */
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wtwait (t, 0, "wtrfm");
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}
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if (t->flags & TPWANY)
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/* Tape was written. Write file mark. */
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wtwritefm (t);
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if (! (minor (dev) & T_NOREWIND)) {
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/* Rewind tape to beginning of tape. */
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/* Don't wait until rewind, though. */
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wtrewind (t);
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goto done;
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}
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if ((t->flags & TPRANY) && ! (t->flags & (TPVOL | TPWANY)))
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/* Space forward to after next file mark if no writing done. */
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/* Don't wait for completion. */
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wtreadfm (t);
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done:
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t->flags &= TPREW | TPRMARK | TPSTART | TPTIMER;
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free (t->buf, M_TEMP);
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isa_dma_release(t->chan);
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return (0);
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}
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/*
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* Ioctl routine. Compatible with BSD ioctls.
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* There are two possible ioctls:
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* ioctl (int fd, MTIOCGET, struct mtget *buf) -- get status
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* ioctl (int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op
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*/
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int
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wtioctl (dev_t dev, int cmd, caddr_t arg, int flags, struct proc *p)
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{
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int u = minor (dev) & T_UNIT;
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wtinfo_t *t = wttab + u;
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int error, count, op;
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if (u >= NWT || t->type == UNKNOWN)
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return (ENXIO);
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switch (cmd) {
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default:
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return (EINVAL);
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case MTIOCIEOT: /* ignore EOT errors */
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case MTIOCEEOT: /* enable EOT errors */
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return (0);
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case MTIOCGET:
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((struct mtget*)arg)->mt_type =
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t->type == ARCHIVE ? MT_ISVIPER1 : 0x11;
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((struct mtget*)arg)->mt_dsreg = t->flags; /* status */
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((struct mtget*)arg)->mt_erreg = t->error.err; /* errors */
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((struct mtget*)arg)->mt_resid = 0;
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((struct mtget*)arg)->mt_fileno = 0; /* file */
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((struct mtget*)arg)->mt_blkno = 0; /* block */
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return (0);
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case MTIOCTOP:
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break;
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}
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switch ((short) ((struct mtop*)arg)->mt_op) {
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default:
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case MTFSR: /* forward space record */
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case MTBSR: /* backward space record */
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case MTBSF: /* backward space file */
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break;
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case MTNOP: /* no operation, sets status only */
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case MTCACHE: /* enable controller cache */
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case MTNOCACHE: /* disable controller cache */
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return (0);
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case MTREW: /* rewind */
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case MTOFFL: /* rewind and put the drive offline */
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if (t->flags & TPREW) /* rewind is running */
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return (0);
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if (error = wtwait (t, PCATCH, "wtorew"))
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return (error);
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wtrewind (t);
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return (0);
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case MTFSF: /* forward space file */
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for (count=((struct mtop*)arg)->mt_count; count>0; --count) {
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if (error = wtwait (t, PCATCH, "wtorfm"))
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return (error);
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if (error = wtreadfm (t))
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return (error);
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}
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return (0);
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case MTWEOF: /* write an end-of-file record */
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if (! (t->flags & TPWRITE) || (t->flags & TPWP))
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return (EACCES);
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if (error = wtwait (t, PCATCH, "wtowfm"))
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return (error);
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if (error = wtwritefm (t))
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return (error);
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return (0);
|
|
case MTRETENS: /* re-tension tape */
|
|
if (error = wtwait (t, PCATCH, "wtretens"))
|
|
return (error);
|
|
op = QIC_RETENS;
|
|
goto erase_retens;
|
|
|
|
case MTERASE: /* erase to EOM */
|
|
if (! (t->flags & TPWRITE) || (t->flags & TPWP))
|
|
return (EACCES);
|
|
if (error = wtwait (t, PCATCH, "wterase"))
|
|
return (error);
|
|
op = QIC_ERASE;
|
|
erase_retens:
|
|
/* ERASE and RETENS operations work like REWIND. */
|
|
/* Simulate the rewind operation here. */
|
|
t->flags &= ~(TPRO | TPWO | TPVOL);
|
|
if (! wtcmd (t, op))
|
|
return (EIO);
|
|
t->flags |= TPSTART | TPREW;
|
|
t->flags |= TPWANY;
|
|
wtclock (t);
|
|
return (0);
|
|
}
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Strategy routine.
|
|
*/
|
|
void
|
|
wtstrategy (struct buf *bp)
|
|
{
|
|
int u = minor (bp->b_dev) & T_UNIT;
|
|
wtinfo_t *t = wttab + u;
|
|
int s;
|
|
|
|
bp->b_resid = bp->b_bcount;
|
|
if (u >= NWT || t->type == UNKNOWN) {
|
|
bp->b_error = ENXIO;
|
|
goto err2xit;
|
|
}
|
|
|
|
/* at file marks and end of tape, we just return '0 bytes available' */
|
|
if (t->flags & TPVOL)
|
|
goto xit;
|
|
|
|
if (bp->b_bcount % t->bsize != 0) {
|
|
bp->b_error = EINVAL;
|
|
goto err2xit;
|
|
}
|
|
|
|
if (bp->b_flags & B_READ) {
|
|
/* Check read access and no previous write to this tape. */
|
|
if (! (t->flags & TPREAD) || (t->flags & TPWANY))
|
|
goto errxit;
|
|
|
|
/* For now, we assume that all data will be copied out */
|
|
/* If read command outstanding, just skip down */
|
|
if (! (t->flags & TPRO)) {
|
|
if (! wtsense (t, 1, TP_WRP)) /* clear status */
|
|
goto errxit;
|
|
if (! wtcmd (t, QIC_RDDATA)) { /* sed read mode */
|
|
wtsense (t, 1, TP_WRP);
|
|
goto errxit;
|
|
}
|
|
t->flags |= TPRO | TPRANY;
|
|
}
|
|
} else {
|
|
/* Check write access and write protection. */
|
|
/* No previous read from this tape allowed. */
|
|
if (! (t->flags & TPWRITE) || (t->flags & (TPWP | TPRANY)))
|
|
goto errxit;
|
|
|
|
/* If write command outstanding, just skip down */
|
|
if (! (t->flags & TPWO)) {
|
|
if (! wtsense (t, 1, 0)) /* clear status */
|
|
goto errxit;
|
|
if (! wtcmd (t, QIC_WRTDATA)) { /* set write mode */
|
|
wtsense (t, 1, 0);
|
|
goto errxit;
|
|
}
|
|
t->flags |= TPWO | TPWANY;
|
|
}
|
|
}
|
|
|
|
if (! bp->b_bcount)
|
|
goto xit;
|
|
|
|
t->flags &= ~TPEXCEP;
|
|
s = splbio ();
|
|
if (wtstart (t, bp->b_flags, bp->b_data, bp->b_bcount)) {
|
|
wtwait (t, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite");
|
|
bp->b_resid -= t->dmacount;
|
|
}
|
|
splx (s);
|
|
|
|
if (t->flags & TPEXCEP) {
|
|
errxit: bp->b_error = EIO;
|
|
err2xit: bp->b_flags |= B_ERROR;
|
|
}
|
|
xit: biodone (bp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Interrupt routine.
|
|
*/
|
|
void
|
|
wtintr (int u)
|
|
{
|
|
wtinfo_t *t = wttab + u;
|
|
unsigned char s;
|
|
|
|
if (u >= NWT || t->type == UNKNOWN) {
|
|
TRACE (("wtintr() -- device not configured\n"));
|
|
return;
|
|
}
|
|
|
|
s = inb (t->STATPORT); /* get status */
|
|
TRACE (("wtintr() status=0x%x -- ", s));
|
|
if ((s & (t->BUSY | t->NOEXCEP)) == (t->BUSY | t->NOEXCEP)) {
|
|
TRACE (("busy\n"));
|
|
return; /* device is busy */
|
|
}
|
|
|
|
/*
|
|
* Check if rewind finished.
|
|
*/
|
|
if (t->flags & TPREW) {
|
|
TRACE (((s & (t->BUSY | t->NOEXCEP)) == (t->BUSY | t->NOEXCEP) ?
|
|
"rewind busy?\n" : "rewind finished\n"));
|
|
t->flags &= ~TPREW; /* Rewind finished. */
|
|
wtsense (t, 1, TP_WRP);
|
|
wakeup ((caddr_t)t);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check if writing/reading of file mark finished.
|
|
*/
|
|
if (t->flags & (TPRMARK | TPWMARK)) {
|
|
TRACE (((s & (t->BUSY | t->NOEXCEP)) == (t->BUSY | t->NOEXCEP) ?
|
|
"marker r/w busy?\n" : "marker r/w finished\n"));
|
|
if (! (s & t->NOEXCEP)) /* operation failed */
|
|
wtsense (t, 1, (t->flags & TPRMARK) ? TP_WRP : 0);
|
|
t->flags &= ~(TPRMARK | TPWMARK); /* operation finished */
|
|
wakeup ((caddr_t)t);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Do we started any i/o? If no, just return.
|
|
*/
|
|
if (! (t->flags & TPACTIVE)) {
|
|
TRACE (("unexpected interrupt\n"));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Clean up dma.
|
|
*/
|
|
if ((t->dmaflags & B_READ) && (t->dmatotal - t->dmacount) < t->bsize) {
|
|
/* If reading short block, copy the internal buffer
|
|
* to the user memory. */
|
|
isa_dmadone (t->dmaflags, t->buf, t->bsize, t->chan);
|
|
bcopy (t->buf, t->dmavaddr, t->dmatotal - t->dmacount);
|
|
} else
|
|
isa_dmadone (t->dmaflags, t->dmavaddr, t->bsize, t->chan);
|
|
|
|
t->flags &= ~TPACTIVE;
|
|
t->dmacount += t->bsize;
|
|
t->dmavaddr = (char *)t->dmavaddr + t->bsize;
|
|
|
|
/*
|
|
* On exception, check for end of file and end of volume.
|
|
*/
|
|
if (! (s & t->NOEXCEP)) {
|
|
TRACE (("i/o exception\n"));
|
|
wtsense (t, 1, (t->dmaflags & B_READ) ? TP_WRP : 0);
|
|
if (t->error.err & (TP_EOM | TP_FIL))
|
|
t->flags |= TPVOL; /* end of file */
|
|
else
|
|
t->flags |= TPEXCEP; /* i/o error */
|
|
wakeup ((caddr_t)t);
|
|
return;
|
|
}
|
|
|
|
if (t->dmacount < t->dmatotal) { /* continue i/o */
|
|
wtdma (t);
|
|
TRACE (("continue i/o, %d\n", t->dmacount));
|
|
return;
|
|
}
|
|
if (t->dmacount > t->dmatotal) /* short last block */
|
|
t->dmacount = t->dmatotal;
|
|
wakeup ((caddr_t)t); /* wake up user level */
|
|
TRACE (("i/o finished, %d\n", t->dmacount));
|
|
}
|
|
|
|
/* start the rewind operation */
|
|
static void
|
|
wtrewind (wtinfo_t *t)
|
|
{
|
|
int rwmode = (t->flags & (TPRO | TPWO));
|
|
|
|
t->flags &= ~(TPRO | TPWO | TPVOL);
|
|
/*
|
|
* Wangtek strictly follows QIC-02 standard:
|
|
* clearing ONLINE in read/write modes causes rewind.
|
|
* REWIND command is not allowed in read/write mode
|
|
* and gives `illegal command' error.
|
|
*/
|
|
if (t->type==WANGTEK && rwmode) {
|
|
outb (t->CTLPORT, 0);
|
|
} else if (! wtcmd (t, QIC_REWIND))
|
|
return;
|
|
t->flags |= TPSTART | TPREW;
|
|
wtclock (t);
|
|
}
|
|
|
|
/* start the `read marker' operation */
|
|
static int
|
|
wtreadfm (wtinfo_t *t)
|
|
{
|
|
t->flags &= ~(TPRO | TPWO | TPVOL);
|
|
if (! wtcmd (t, QIC_READFM)) {
|
|
wtsense (t, 1, TP_WRP);
|
|
return (EIO);
|
|
}
|
|
t->flags |= TPRMARK | TPRANY;
|
|
wtclock (t);
|
|
/* Don't wait for completion here. */
|
|
return (0);
|
|
}
|
|
|
|
/* write marker to the tape */
|
|
static int
|
|
wtwritefm (wtinfo_t *t)
|
|
{
|
|
tsleep ((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); /* timeout: 1 second */
|
|
t->flags &= ~(TPRO | TPWO);
|
|
if (! wtcmd (t, QIC_WRITEFM)) {
|
|
wtsense (t, 1, 0);
|
|
return (EIO);
|
|
}
|
|
t->flags |= TPWMARK | TPWANY;
|
|
wtclock (t);
|
|
return (wtwait (t, 0, "wtwfm"));
|
|
}
|
|
|
|
/* while controller status & mask == bits continue waiting */
|
|
static int
|
|
wtpoll (wtinfo_t *t, int mask, int bits)
|
|
{
|
|
int s, i;
|
|
|
|
/* Poll status port, waiting for specified bits. */
|
|
for (i=0; i<1000; ++i) { /* up to 1 msec */
|
|
s = inb (t->STATPORT);
|
|
if ((s & mask) != bits)
|
|
return (s);
|
|
DELAY (1);
|
|
}
|
|
for (i=0; i<100; ++i) { /* up to 10 msec */
|
|
s = inb (t->STATPORT);
|
|
if ((s & mask) != bits)
|
|
return (s);
|
|
DELAY (100);
|
|
}
|
|
for (;;) { /* forever */
|
|
s = inb (t->STATPORT);
|
|
if ((s & mask) != bits)
|
|
return (s);
|
|
tsleep ((caddr_t)wtpoll, WTPRI, "wtpoll", 1); /* timeout: 1 tick */
|
|
}
|
|
}
|
|
|
|
/* execute QIC command */
|
|
static int
|
|
wtcmd (wtinfo_t *t, int cmd)
|
|
{
|
|
int s, x;
|
|
|
|
TRACE (("wtcmd() cmd=0x%x\n", cmd));
|
|
x = splbio();
|
|
s = wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP); /* ready? */
|
|
if (! (s & t->NOEXCEP)) { /* error */
|
|
splx(x);
|
|
return (0);
|
|
}
|
|
|
|
outb (t->CMDPORT, cmd); /* output the command */
|
|
|
|
outb (t->CTLPORT, t->REQUEST | t->ONLINE); /* set request */
|
|
wtpoll (t, t->BUSY, t->BUSY); /* wait for ready */
|
|
outb (t->CTLPORT, t->IEN | t->ONLINE); /* reset request */
|
|
wtpoll (t, t->BUSY, 0); /* wait for not ready */
|
|
splx(x);
|
|
return (1);
|
|
}
|
|
|
|
/* wait for the end of i/o, seeking marker or rewind operation */
|
|
static int
|
|
wtwait (wtinfo_t *t, int catch, char *msg)
|
|
{
|
|
int error;
|
|
|
|
TRACE (("wtwait() `%s'\n", msg));
|
|
while (t->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK))
|
|
if (error = tsleep ((caddr_t)t, WTPRI | catch, msg, 0))
|
|
return (error);
|
|
return (0);
|
|
}
|
|
|
|
/* initialize dma for the i/o operation */
|
|
static void
|
|
wtdma (wtinfo_t *t)
|
|
{
|
|
t->flags |= TPACTIVE;
|
|
wtclock (t);
|
|
|
|
if (t->type == ARCHIVE)
|
|
outb (t->SDMAPORT, 0); /* set dma */
|
|
|
|
if ((t->dmaflags & B_READ) && (t->dmatotal - t->dmacount) < t->bsize)
|
|
/* Reading short block. Do it through the internal buffer. */
|
|
isa_dmastart (t->dmaflags, t->buf, t->bsize, t->chan);
|
|
else
|
|
isa_dmastart (t->dmaflags, t->dmavaddr, t->bsize, t->chan);
|
|
}
|
|
|
|
/* start i/o operation */
|
|
static int
|
|
wtstart (wtinfo_t *t, unsigned flags, void *vaddr, unsigned len)
|
|
{
|
|
int s, x;
|
|
|
|
TRACE (("wtstart()\n"));
|
|
x = splbio();
|
|
s = wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP); /* ready? */
|
|
if (! (s & t->NOEXCEP)) {
|
|
t->flags |= TPEXCEP; /* error */
|
|
splx(x);
|
|
return (0);
|
|
}
|
|
t->flags &= ~TPEXCEP; /* clear exception flag */
|
|
t->dmavaddr = vaddr;
|
|
t->dmatotal = len;
|
|
t->dmacount = 0;
|
|
t->dmaflags = flags;
|
|
wtdma (t);
|
|
splx(x);
|
|
return (1);
|
|
}
|
|
|
|
/* start timer */
|
|
static void
|
|
wtclock (wtinfo_t *t)
|
|
{
|
|
if (! (t->flags & TPTIMER)) {
|
|
t->flags |= TPTIMER;
|
|
/* Some controllers seem to lose dma interrupts too often.
|
|
* To make the tape stream we need 1 tick timeout. */
|
|
timeout (wtimer, (caddr_t)t, (t->flags & TPACTIVE) ? 1 : hz);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Simulate an interrupt periodically while i/o is going.
|
|
* This is necessary in case interrupts get eaten due to
|
|
* multiple devices on a single IRQ line.
|
|
*/
|
|
static void
|
|
wtimer (void *xt)
|
|
{
|
|
wtinfo_t *t = (wtinfo_t *)xt;
|
|
int s;
|
|
|
|
t->flags &= ~TPTIMER;
|
|
if (! (t->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)))
|
|
return;
|
|
|
|
/* If i/o going, simulate interrupt. */
|
|
s = splbio ();
|
|
if ((inb (t->STATPORT) & (t->BUSY | t->NOEXCEP)) != (t->BUSY | t->NOEXCEP)) {
|
|
TRACE (("wtimer() -- "));
|
|
wtintr (t->unit);
|
|
}
|
|
splx (s);
|
|
|
|
/* Restart timer if i/o pending. */
|
|
if (t->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK))
|
|
wtclock (t);
|
|
}
|
|
|
|
/* reset the controller */
|
|
static int
|
|
wtreset (wtinfo_t *t)
|
|
{
|
|
/* Perform QIC-02 and QIC-36 compatible reset sequence. */
|
|
/* Thanks to Mikael Hybsch <micke@dynas.se>. */
|
|
int s, i;
|
|
|
|
outb (t->CTLPORT, t->RESET | t->ONLINE); /* send reset */
|
|
DELAY (30);
|
|
outb (t->CTLPORT, t->ONLINE); /* turn off reset */
|
|
DELAY (30);
|
|
|
|
/* Read the controller status. */
|
|
s = inb (t->STATPORT);
|
|
if (s == 0xff) /* no port at this address? */
|
|
return (0);
|
|
|
|
/* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */
|
|
for (i=0; i<3000; ++i) {
|
|
if (! (s & t->BUSY) || ! (s & t->NOEXCEP))
|
|
break;
|
|
DELAY (1000);
|
|
s = inb (t->STATPORT);
|
|
}
|
|
return ((s & t->RESETMASK) == t->RESETVAL);
|
|
}
|
|
|
|
/* get controller status information */
|
|
/* return 0 if user i/o request should receive an i/o error code */
|
|
static int
|
|
wtsense (wtinfo_t *t, int verb, int ignor)
|
|
{
|
|
char *msg = 0;
|
|
int err;
|
|
|
|
TRACE (("wtsense() ignor=0x%x\n", ignor));
|
|
t->flags &= ~(TPRO | TPWO);
|
|
if (! wtstatus (t))
|
|
return (0);
|
|
if (! (t->error.err & TP_ST0))
|
|
t->error.err &= ~TP_ST0MASK;
|
|
if (! (t->error.err & TP_ST1))
|
|
t->error.err &= ~TP_ST1MASK;
|
|
t->error.err &= ~ignor; /* ignore certain errors */
|
|
err = t->error.err & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP |
|
|
TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL);
|
|
if (! err)
|
|
return (1);
|
|
if (! verb)
|
|
return (0);
|
|
|
|
/* lifted from tdriver.c from Wangtek */
|
|
if (err & TP_USL) msg = "Drive not online";
|
|
else if (err & TP_CNI) msg = "No cartridge";
|
|
else if ((err & TP_WRP) && !(t->flags & TPWP)) {
|
|
msg = "Tape is write protected";
|
|
t->flags |= TPWP;
|
|
}
|
|
else if (err & TP_FIL) msg = 0 /*"Filemark detected"*/;
|
|
else if (err & TP_EOM) msg = 0 /*"End of tape"*/;
|
|
else if (err & TP_BNL) msg = "Block not located";
|
|
else if (err & TP_UDA) msg = "Unrecoverable data error";
|
|
else if (err & TP_NDT) msg = "No data detected";
|
|
else if (err & TP_ILL) msg = "Illegal command";
|
|
if (msg)
|
|
printf ("wt%d: %s\n", t->unit, msg);
|
|
return (0);
|
|
}
|
|
|
|
/* get controller status information */
|
|
static int
|
|
wtstatus (wtinfo_t *t)
|
|
{
|
|
char *p;
|
|
int x;
|
|
|
|
x = splbio();
|
|
wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP); /* ready? */
|
|
outb (t->CMDPORT, QIC_RDSTAT); /* send `read status' command */
|
|
|
|
outb (t->CTLPORT, t->REQUEST | t->ONLINE); /* set request */
|
|
wtpoll (t, t->BUSY, t->BUSY); /* wait for ready */
|
|
outb (t->CTLPORT, t->ONLINE); /* reset request */
|
|
wtpoll (t, t->BUSY, 0); /* wait for not ready */
|
|
|
|
p = (char*) &t->error;
|
|
while (p < (char*)&t->error + 6) {
|
|
int s = wtpoll (t, t->BUSY | t->NOEXCEP, t->BUSY | t->NOEXCEP);
|
|
if (! (s & t->NOEXCEP)) { /* error */
|
|
splx(x);
|
|
return (0);
|
|
}
|
|
|
|
*p++ = inb (t->DATAPORT); /* read status byte */
|
|
|
|
outb (t->CTLPORT, t->REQUEST | t->ONLINE); /* set request */
|
|
wtpoll (t, t->BUSY, 0); /* wait for not ready */
|
|
DELAY(20);
|
|
outb (t->CTLPORT, t->ONLINE); /* unset request */
|
|
}
|
|
splx(x);
|
|
return (1);
|
|
}
|
|
|
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static wt_devsw_installed = 0;
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static void
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wt_drvinit(void *unused)
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{
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if( ! wt_devsw_installed ) {
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bdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &wt_bdevsw);
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wt_devsw_installed = 1;
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}
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}
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SYSINIT(wtdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,wt_drvinit,NULL)
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#endif /* NWT */
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