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freebsd/sys/i386/isa/wst.c
Peter Wemm c3aac50f28 $Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00

788 lines
23 KiB
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/*-
* Copyright (c) 1998 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "wdc.h"
#include "wst.h"
#include "opt_ddb.h"
#if NWST > 0 && NWDC > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/mtio.h>
#include <machine/clock.h>
#include <i386/isa/atapi.h>
static d_open_t wstopen;
static d_close_t wstclose;
static d_ioctl_t wstioctl;
static d_strategy_t wststrategy;
#define CDEV_MAJOR 90
#define BDEV_MAJOR 24
static struct cdevsw wst_cdevsw = {
/* open */ wstopen,
/* close */ wstclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ wstioctl,
/* stop */ nostop,
/* reset */ noreset,
/* devtotty */ nodevtotty,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ wststrategy,
/* name */ "wst",
/* parms */ noparms,
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* maxio */ 0,
/* bmaj */ BDEV_MAJOR
};
static unsigned int wst_total = 0;
#define NUNIT (NWDC*2)
#define UNIT(d) ((minor(d) >> 3) & 3)
#define WST_OPEN 0x0001 /* The device is opened */
#define WST_MEDIA_CHANGED 0x0002 /* The media have changed */
#define WST_DATA_WRITTEN 0x0004 /* Data has been written */
#define WST_FM_WRITTEN 0x0008 /* Filemark has been written */
#define WST_DEBUG 0x0010 /* Print debug info */
#define WST_CTL_WARN 0x0020 /* Have we warned about CTL wrong? */
/* ATAPI tape commands not in std ATAPI command set */
#define ATAPI_TAPE_REWIND 0x01
#define ATAPI_TAPE_REQUEST_SENSE 0x03
#define ATAPI_TAPE_READ_CMD 0x08
#define ATAPI_TAPE_WRITE_CMD 0x0a
#define ATAPI_TAPE_WEOF 0x10
#define WEOF_WRITE_MASK 0x01
#define ATAPI_TAPE_SPACE_CMD 0x11
#define SP_FM 0x01
#define SP_EOD 0x03
#define ATAPI_TAPE_ERASE 0x19
#define ATAPI_TAPE_MODE_SENSE 0x1a
#define ATAPI_TAPE_LOAD_UNLOAD 0x1b
#define LU_LOAD_MASK 0x01
#define LU_RETENSION_MASK 0x02
#define LU_EOT_MASK 0x04
#define DSC_POLL_INTERVAL 10
/*
* MODE SENSE parameter header
*/
struct wst_header {
u_char data_length; /* Total length of data */
u_char medium_type; /* Medium type (if any) */
u_char dsp; /* Device specific parameter */
u_char bdl; /* Block Descriptor Length */
};
/*
* ATAPI tape drive Capabilities and Mechanical Status Page
*/
#define ATAPI_TAPE_CAP_PAGE 0x2a
struct wst_cappage {
u_int page_code :6; /* Page code == 0x2a */
u_int reserved1_67 :2;
u_char page_length; /* Page Length == 0x12 */
u_char reserved2;
u_char reserved3;
u_int readonly :1; /* Read Only Mode */
u_int reserved4_1234 :4;
u_int reverse :1; /* Supports reverse direction */
u_int reserved4_67 :2;
u_int reserved5_012 :3;
u_int eformat :1; /* Supports ERASE formatting */
u_int reserved5_4 :1;
u_int qfa :1; /* Supports QFA formats */
u_int reserved5_67 :2;
u_int lock :1; /* Supports locking media */
u_int locked :1; /* The media is locked */
u_int prevent :1; /* Defaults to prevent state */
u_int eject :1; /* Supports eject */
u_int disconnect :1; /* Can break request > ctl */
u_int reserved6_5 :1;
u_int ecc :1; /* Supports error correction */
u_int compress :1; /* Supports data compression */
u_int reserved7_0 :1;
u_int blk512 :1; /* Supports 512b block size */
u_int blk1024 :1; /* Supports 1024b block size */
u_int reserved7_3456 :4;
u_int slowb :1; /* Restricts byte count */
u_short max_speed; /* Supported speed in KBps */
u_short max_defects; /* Max stored defect entries */
u_short ctl; /* Continuous Transfer Limit */
u_short speed; /* Current Speed, in KBps */
u_short buffer_size; /* Buffer Size, in 512 bytes */
u_char reserved18;
u_char reserved19;
};
/*
* REQUEST SENSE structure
*/
struct wst_reqsense {
u_int error_code :7; /* Current or deferred errors */
u_int valid :1; /* Follows QIC-157C */
u_char reserved1; /* Segment Number - Reserved */
u_int sense_key :4; /* Sense Key */
u_int reserved2_4 :1; /* Reserved */
u_int ili :1; /* Incorrect Length Indicator */
u_int eom :1; /* End Of Medium */
u_int filemark :1; /* Filemark */
u_int info __attribute__((packed)); /* Cmd specific info */
u_char asl; /* Additional sense length (n-7) */
u_int command_specific; /* Additional cmd specific info */
u_char asc; /* Additional Sense Code */
u_char ascq; /* Additional Sense Code Qualifier */
u_char replaceable_unit_code; /* Field Replaceable Unit Code */
u_int sk_specific1 :7; /* Sense Key Specific */
u_int sksv :1; /* Sense Key Specific info valid */
u_char sk_specific2; /* Sense Key Specific */
u_char sk_specific3; /* Sense Key Specific */
u_char pad[2]; /* Padding */
};
struct wst {
struct atapi *ata; /* Controller structure */
int unit; /* IDE bus drive unit */
int lun; /* Logical device unit */
int flags; /* Device state flags */
int blksize; /* Block size (512 | 1024) */
struct buf_queue_head buf_queue; /* Queue of i/o requests */
struct atapi_params *param; /* Drive parameters table */
struct wst_header header; /* MODE SENSE param header */
struct wst_cappage cap; /* Capabilities page info */
};
static struct wst *wsttab[NUNIT]; /* Drive info by unit number */
static int wstnlun = 0; /* Number of config'd drives */
int wstattach(struct atapi *ata, int unit, struct atapi_params *ap, int debug);
static int wst_sense(struct wst *t);
static void wst_describe(struct wst *t);
static void wst_poll_dsc(struct wst *t);
static void wst_start(struct wst *t);
static void wst_done(struct wst *t, struct buf *bp, int resid, struct atapires result);
static int wst_error(struct wst *t, struct atapires result);
static void wst_drvinit(void *unused);
static int wst_space_cmd(struct wst *t, u_char function, u_int count);
static int wst_write_filemark(struct wst *t, u_char function);
static int wst_erase(struct wst *t);
static int wst_load_unload(struct wst *t, u_char finction);
static int wst_rewind(struct wst *t);
static void wst_reset(struct wst *t);
#ifdef DDB
void wst_dump(int lun, char *label, void *data, int len);
void
wst_dump(int lun, char *label, void *data, int len)
{
u_char *p = data;
printf("wst%d: %s %x", lun, label, *p++);
while(--len > 0)
printf("-%x", *p++);
printf("\n");
}
#endif
int
wstattach(struct atapi *ata, int unit, struct atapi_params *ap, int debug)
{
struct wst *t;
int lun;
if (wstnlun >= NUNIT) {
printf("wst: too many units\n");
return(-1);
}
if (!atapi_request_immediate) {
printf("wst: configuration error, ATAPI core code not present!\n");
printf(
"wst: check `options ATAPI_STATIC' in your kernel config file!\n");
return(-1);
}
t = malloc(sizeof(struct wst), M_TEMP, M_NOWAIT);
if (!t) {
printf("wst: out of memory\n");
return(-1);
}
wsttab[wstnlun] = t;
bzero(t, sizeof(struct wst));
bufq_init(&t->buf_queue);
t->ata = ata;
t->unit = unit;
t->ata->use_dsc = 1;
lun = t->lun = wstnlun;
t->param = ap;
t->flags = WST_MEDIA_CHANGED | WST_DEBUG;
if (wst_sense(t))
return -1;
wst_describe(t);
wstnlun++;
make_dev(&wst_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0640, "rwst%d", t->lun);
return(1);
}
static int
wst_sense(struct wst *t)
{
struct atapires result;
int count;
char buffer[255];
/* Get drive capabilities, some drives needs this repeated */
for (count = 0 ; count < 5 ; count++) {
result = atapi_request_immediate(t->ata, t->unit,
ATAPI_TAPE_MODE_SENSE,
8, /* DBD = 1 no block descr */
ATAPI_TAPE_CAP_PAGE,
sizeof(buffer)>>8, sizeof(buffer),
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, buffer, sizeof(buffer));
if (result.code == 0 || result.code == RES_UNDERRUN)
break;
}
/* Some drives have shorter capabilities page. */
if (result.code == RES_UNDERRUN)
result.code = 0;
if (result.code == 0) {
bcopy(buffer, &t->header, sizeof(struct wst_header));
bcopy(buffer+sizeof(struct wst_header),
&t->cap, sizeof(struct wst_cappage));
if (t->cap.page_code != ATAPI_TAPE_CAP_PAGE)
return 1;
t->cap.max_speed = ntohs(t->cap.max_speed);
t->cap.max_defects = ntohs(t->cap.max_defects);
t->cap.ctl = ntohs(t->cap.ctl);
t->cap.speed = ntohs(t->cap.speed);
t->cap.buffer_size = ntohs(t->cap.buffer_size);
t->blksize = (t->cap.blk512 ? 512 : (t->cap.blk1024 ? 1024 : 0));
return 0;
}
return 1;
}
static void
wst_describe(struct wst *t)
{
printf("wst%d: ", t->lun);
switch (t->header.medium_type) {
case 0x00: printf("Drive empty"); break;
case 0x17: printf("Travan 1 (400 Mbyte) media"); break;
case 0xb6: printf("Travan 4 (4 Gbyte) media"); break;
default: printf("Unknown media (0x%x)", t->header.medium_type);
}
if (t->cap.readonly) printf(", readonly");
if (t->cap.reverse) printf(", reverse");
if (t->cap.eformat) printf(", eformat");
if (t->cap.qfa) printf(", qfa");
if (t->cap.lock) printf(", lock");
if (t->cap.locked) printf(", locked");
if (t->cap.prevent) printf(", prevent");
if (t->cap.eject) printf(", eject");
if (t->cap.disconnect) printf(", disconnect");
if (t->cap.ecc) printf(", ecc");
if (t->cap.compress) printf(", compress");
if (t->cap.blk512) printf(", 512b");
if (t->cap.blk1024) printf(", 1024b");
if (t->cap.slowb) printf(", slowb");
printf("\nwst%d: ", t->lun);
printf("Max speed=%dKb/s, ", t->cap.max_speed);
printf("Transfer limit=%d blocks, ", t->cap.ctl);
printf("Buffer size=%d blocks", t->cap.buffer_size);
printf("\n");
}
int
wstopen(dev_t dev, int flags, int fmt, struct proc *p)
{
int lun = UNIT(dev);
struct wst *t;
/* Check that the device number and that the ATAPI driver is loaded. */
if (lun >= wstnlun || !atapi_request_immediate) {
printf("ENXIO lun=%d, wstnlun=%d, im=%p\n",
lun, wstnlun, (void *)atapi_request_immediate);
return(ENXIO);
}
t = wsttab[lun];
if (t->flags == WST_OPEN)
return EBUSY;
if (wst_sense(t))
printf("wst%d: Sense media type failed\n", t->lun);
t->flags &= ~WST_MEDIA_CHANGED;
t->flags &= ~(WST_DATA_WRITTEN | WST_FM_WRITTEN);
t->flags |= WST_OPEN;
return(0);
}
int
wstclose(dev_t dev, int flags, int fmt, struct proc *p)
{
int lun = UNIT(dev);
struct wst *t = wsttab[lun];
/* Flush buffers, some drives fail here, but they should report ctl = 0 */
if (t->cap.ctl && (t->flags & WST_DATA_WRITTEN))
wst_write_filemark(t, 0);
/* Write filemark if data written to tape */
if ((t->flags & (WST_DATA_WRITTEN | WST_FM_WRITTEN)) == WST_DATA_WRITTEN)
wst_write_filemark(t, WEOF_WRITE_MASK);
/* If minor is even rewind on close */
if (!(minor(dev) & 0x01))
wst_rewind(t);
t->flags &= ~WST_OPEN;
if (t->flags & WST_DEBUG)
printf("wst%d: %ud total bytes transferred\n", t->lun, wst_total);
t->flags &= ~WST_CTL_WARN;
return(0);
}
void
wststrategy(struct buf *bp)
{
int lun = UNIT(bp->b_dev);
struct wst *t = wsttab[lun];
int x;
/* If it's a null transfer, return immediatly. */
if (bp->b_bcount == 0) {
bp->b_resid = 0;
biodone(bp);
return;
}
/* Check for != blocksize requests */
if (bp->b_bcount % t->blksize) {
printf("wst%d: bad request, must be multiple of %d\n", lun, t->blksize);
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
biodone(bp);
return;
}
if (bp->b_bcount > t->blksize*t->cap.ctl) {
if ((t->flags & WST_CTL_WARN) == 0) {
printf("wst%d: WARNING: CTL exceeded %ld>%d\n",
lun, bp->b_bcount, t->blksize*t->cap.ctl);
t->flags |= WST_CTL_WARN;
}
}
x = splbio();
wst_total += bp->b_bcount;
bufq_insert_tail(&t->buf_queue, bp);
wst_start(t);
splx(x);
}
static void
wst_poll_dsc(struct wst *t)
{
/* We should use a final timeout here SOS XXX */
if (!(inb(t->ata->port + AR_STATUS) & ARS_DSC)) {
timeout((timeout_t*)wst_poll_dsc, t, DSC_POLL_INTERVAL);
return;
}
t->ata->wait_for_dsc = 0;
wakeup((caddr_t)t);
}
static void
wst_start(struct wst *t)
{
struct buf *bp = bufq_first(&t->buf_queue);
u_long blk_count;
u_char op_code;
long byte_count;
if (!bp)
return;
if (t->ata->wait_for_dsc)
printf("wst%d: ERROR! allready waiting for DSC\n", t->lun);
/* Sleep waiting for a ready drive (DSC) */
if (t->ata->use_dsc && !(inb(t->ata->port + AR_STATUS) & ARS_DSC)) {
t->ata->wait_for_dsc = 1;
timeout((timeout_t*)wst_poll_dsc, t, DSC_POLL_INTERVAL);
tsleep((caddr_t) t, 0, "wstdsc", 0);
}
bufq_remove(&t->buf_queue, bp);
blk_count = bp->b_bcount / t->blksize;
if (bp->b_flags & B_READ) {
op_code = ATAPI_TAPE_READ_CMD;
byte_count = bp->b_bcount;
} else {
op_code = ATAPI_TAPE_WRITE_CMD;
t->flags |= WST_DATA_WRITTEN;
byte_count = -bp->b_bcount;
}
atapi_request_callback(t->ata, t->unit, op_code, 1,
blk_count>>16, blk_count>>8, blk_count,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
(u_char*) bp->b_data, byte_count,
(void*)wst_done, t, bp);
}
static void
wst_done(struct wst *t, struct buf *bp, int resid,
struct atapires result)
{
if (result.code) {
printf("wst_done: ");
wst_error(t, result);
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
}
else
bp->b_resid = resid;
biodone(bp);
/*wst_start(t);*/
}
static int
wst_error(struct wst *t, struct atapires result)
{
struct wst_reqsense sense;
if (result.code != RES_ERR) {
printf("wst%d: ERROR code=%d, status=%b, error=%b\n", t->lun,
result.code, result.status, ARS_BITS, result.error, AER_BITS);
return 1;
}
if ((result.error & AER_SKEY) && (result.status & ARS_CHECK)) {
atapi_request_immediate(t->ata, t->unit,
ATAPI_TAPE_REQUEST_SENSE,
0, 0, 0, sizeof(sense),
0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, (char*) &sense, sizeof(struct wst_reqsense));
/*wst_dump(t->lun, "req_sense", &sense, sizeof(struct wst_reqsense));*/
}
switch (result.error & AER_SKEY) {
case AER_SK_NOT_READY:
if (result.error & ~AER_SKEY) {
if (t->flags & WST_DEBUG)
printf("wst%d: not ready\n", t->lun);
break;
}
if (!(t->flags & WST_MEDIA_CHANGED))
if (t->flags & WST_DEBUG)
printf("wst%d: no media\n", t->lun);
t->flags |= WST_MEDIA_CHANGED;
break;
case AER_SK_BLANK_CHECK:
if (t->flags & WST_DEBUG)
printf("wst%d: EOD encountered\n", t->lun);
break;
case AER_SK_MEDIUM_ERROR:
if (t->flags & WST_DEBUG)
printf("wst%d: nonrecovered data error\n", t->lun);
break;
case AER_SK_HARDWARE_ERROR:
if (t->flags & WST_DEBUG)
printf("wst%d: nonrecovered hardware error\n", t->lun);
break;
case AER_SK_ILLEGAL_REQUEST:
if (t->flags & WST_DEBUG)
printf("wst%d: invalid command\n", t->lun);
break;
case AER_SK_UNIT_ATTENTION:
if (!(t->flags & WST_MEDIA_CHANGED))
printf("wst%d: media changed\n", t->lun);
t->flags |= WST_MEDIA_CHANGED;
break;
case AER_SK_DATA_PROTECT:
if (t->flags & WST_DEBUG)
printf("wst%d: reading read protected data\n", t->lun);
break;
case AER_SK_ABORTED_COMMAND:
if (t->flags & WST_DEBUG)
printf("wst%d: command aborted\n", t->lun);
break;
case AER_SK_MISCOMPARE:
if (t->flags & WST_DEBUG)
printf("wst%d: data don't match medium\n", t->lun);
break;
default:
printf("wst%d: i/o error, status=%b, error=%b\n", t->lun,
result.status, ARS_BITS, result.error, AER_BITS);
}
printf("total=%u ERR=%x len=%ld ASC=%x ASCQ=%x\n",
wst_total, sense.error_code, (long)ntohl(sense.info),
sense.asc, sense.ascq);
return 1;
}
int
wstioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
int lun = UNIT(dev);
int error = 0;
struct wst *t = wsttab[lun];
switch (cmd) {
case MTIOCGET:
{
struct mtget *g = (struct mtget *) addr;
bzero(g, sizeof(struct mtget));
g->mt_type = 7;
g->mt_density = 1;
g->mt_blksiz = t->blksize;
g->mt_comp = t->cap.compress;
g->mt_density0 = 0; g->mt_density1 = 0;
g->mt_density2 = 0; g->mt_density3 = 0;
g->mt_blksiz0 = 0; g->mt_blksiz1 = 0;
g->mt_blksiz2 = 0; g->mt_blksiz3 = 0;
g->mt_comp0 = 0; g->mt_comp1 = 0;
g->mt_comp2 = 0; g->mt_comp3 = 0;
break;
}
case MTIOCTOP:
{
int i;
struct mtop *mt = (struct mtop *)addr;
switch ((short) (mt->mt_op)) {
case MTWEOF:
for (i=0; i < mt->mt_count && !error; i++)
error = wst_write_filemark(t, WEOF_WRITE_MASK);
break;
case MTFSF:
if (mt->mt_count)
error = wst_space_cmd(t, SP_FM, mt->mt_count);
break;
case MTBSF:
if (mt->mt_count)
error = wst_space_cmd(t, SP_FM, -(mt->mt_count));
break;
case MTFSR:
error = EINVAL; break;
case MTBSR:
error = EINVAL; break;
case MTREW:
error = wst_rewind(t);
break;
case MTOFFL:
#if 1 /* Misuse as a reset func for now */
wst_reset(t);
wst_sense(t);
wst_describe(t);
#else
if (error = wst_rewind(t))
break;
error = wst_load_unload(t, !LU_LOAD_MASK);
#endif
break;
case MTNOP:
error = wst_write_filemark(t, 0);
break;
case MTCACHE:
error = EINVAL; break;
case MTNOCACHE:
error = EINVAL; break;
case MTSETBSIZ:
error = EINVAL; break;
case MTSETDNSTY:
error = EINVAL; break;
case MTERASE:
error = wst_erase(t);
break;
case MTEOD:
error = wst_space_cmd(t, SP_EOD, 0);
break;
case MTCOMP:
error = EINVAL; break;
case MTRETENS:
error = wst_load_unload(t, LU_RETENSION_MASK|LU_LOAD_MASK);
break;
default:
error = EINVAL;
}
return error;
}
default:
return(ENOTTY);
}
return(error);
}
static int
wst_space_cmd(struct wst *t, u_char function, u_int count)
{
struct atapires result;
result = atapi_request_wait(t->ata, t->unit,
ATAPI_TAPE_SPACE_CMD, function,
count>>16, count>>8, count,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, 0);
if (result.code) {
printf("wst_space_cmd: ");
wst_error(t, result);
return EIO;
}
return 0;
}
static int
wst_write_filemark(struct wst *t, u_char function)
{
struct atapires result;
if (function) {
if (t->flags & WST_FM_WRITTEN)
t->flags &= ~WST_DATA_WRITTEN;
else
t->flags |= WST_FM_WRITTEN;
}
result = atapi_request_wait(t->ata, t->unit,
ATAPI_TAPE_WEOF, 0, 0, 0, function,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, 0);
if (result.code) {
printf("wst_write_filemark: ");
wst_error(t, result);
return EIO;
}
return 0;
}
static int
wst_load_unload(struct wst *t, u_char function)
{
struct atapires result;
result = atapi_request_wait(t->ata, t->unit,
ATAPI_TAPE_LOAD_UNLOAD, 0, 0, 0, function,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, 0);
if (result.code) {
printf("wst_load_unload: ");
wst_error(t, result);
return EIO;
}
return 0;
}
static int
wst_erase(struct wst *t)
{
int error;
struct atapires result;
error = wst_rewind(t);
if (error)
return error;
result = atapi_request_wait(t->ata, t->unit,
ATAPI_TAPE_ERASE, 3, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
NULL, 0);
if (result.code) {
printf("wst_erase: ");
wst_error(t, result);
return EIO;
}
return 0;
}
static int
wst_rewind(struct wst *t)
{
struct atapires result;
result = atapi_request_wait(t->ata, t->unit,
ATAPI_TAPE_REWIND, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
NULL, 0);
if (result.code) {
printf("wst_rewind: ");
wst_error(t, result);
return EIO;
}
return 0;
}
static void
wst_reset(struct wst *t)
{
outb(t->ata->port + AR_DRIVE, ARD_DRIVE1);
DELAY(30);
outb(t->ata->port + AR_COMMAND, 0x08);
DELAY(30);
}
static void
wst_drvinit(void *unused)
{
cdevsw_add(&wst_cdevsw);
}
SYSINIT(wstdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,wst_drvinit,NULL)
#endif /* NWST && NWDC */
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