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Fold in my latest changes to the worm driver.

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This makes it sorta usable, just for my ``proof-of-concept'' Perl
script i've been posting to freebsd-scsi.  The driver will be
overhauled further, this is just to provide Jordan with a base to
perform testing of his own with his HP burner.  Use entirely at your
own risk, expect a bunch of misburnt CD-R's when using it already in
this very green stage.

Note that by now the driver will only work when the CD-R has already
been in the drive at boot time.
This commit is contained in:
Joerg Wunsch 1996-01-20 15:27:36 +00:00
parent e82d9e7eb5
commit 794b6a665f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=13517
1 changed files with 17 additions and 6 deletions
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23
sys/scsi/worm.c
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@ -37,7 +37,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: worm.c,v 1.17 1996/01/02 15:44:00 joerg Exp $
* $Id: worm.c,v 1.18 1996/01/05 20:12:53 wollman Exp $
*/
/* XXX This is PRELIMINARY.
@ -287,11 +287,15 @@ worm_strategy(struct buf *bp, struct scsi_link *sc_link)
unit = minor((bp->b_dev));
worm = sc_link->sd;
/* XXX: Can't we move this check up to "scsi_strategy"?
/*
* The ugly modulo operation is necessary since audio tracks
* have a block size of 2352 bytes.
*/
if (!(sc_link->flags & SDEV_MEDIA_LOADED) ||
bp->b_blkno > worm->n_blks ||
bp->b_bcount & (worm->blk_size - 1)) {
bp->b_blkno * DEV_BSIZE > worm->n_blks * worm->blk_size||
(bp->b_bcount % worm->blk_size) != 0) {
SC_DEBUG(sc_link, SDEV_DB2,
("worm block size / capacity error") );
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
biodone(bp);
@ -355,18 +359,23 @@ struct scsi_link *sc_link)
sc_link->flags &= ~SDEV_OPEN;
return ENXIO;
}
#if 0
scsi_start_unit(sc_link, SCSI_SILENT);
scsi_prevent(sc_link, PR_PREVENT, SCSI_SILENT);
/*
* XXX The worm_size() is required, alas, putting it here will
* result in an ICORRECT COMMAND SEQUENCE error. Without it,
* the driver will only work if the CD-R was present at boot-time.
*/
if (worm_size(sc_link, 0) == 0) {
scsi_stop_unit(sc_link, 0, SCSI_SILENT);
scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT);
sc_link->flags &= ~SDEV_OPEN;
return ENXIO;
}
#endif
return 0;
}
@ -374,8 +383,10 @@ static int
worm_close(dev_t dev, int flag, int fmt, struct proc *p,
struct scsi_link *sc_link)
{
#if 0
scsi_stop_unit(sc_link, 0, SCSI_SILENT);
scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT);
#endif
sc_link->flags &= ~SDEV_OPEN;
return 0;