/*
* close the device.. only called if we are the LAST
* occurence of an open device
*/
static int
ssclose(dev_t dev, int flag, int mode, struct lwp *l)
{
struct ss_softc *ss = device_lookup_private(&ss_cd, SSUNIT(dev));
struct scsipi_periph *periph = ss->sc_periph;
struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter;
int error;
SC_DEBUG(ss->sc_periph, SCSIPI_DB1, ("closing\n"));
if (SSMODE(dev) == MODE_REWIND) {
if (ss->special && ss->special->rewind_scanner) {
/* call special handler to rewind/abort scan */
error = (ss->special->rewind_scanner)(ss);
if (error)
return error;
} else {
/* XXX add code to restart a SCSI2 scanner, if any */
}
ss->sio.scan_window_size = 0;
ss->flags &= ~SSF_TRIGGERED;
}
scsipi_wait_drain(periph);
scsipi_adapter_delref(adapt);
periph->periph_flags &= ~PERIPH_OPEN;
return 0;
}
static int
ssdetach(device_t self, int flags)
{
struct ss_softc *ss = device_private(self);
int s, cmaj, mn;
/* locate the major number */
cmaj = cdevsw_lookup_major(&ss_cdevsw);
/* kill any pending restart */
callout_stop(&ss->sc_callout);
s = splbio();
/* Kill off any queued buffers. */
bufq_drain(ss->buf_queue);
bufq_free(ss->buf_queue);
/* Kill off any pending commands. */
scsipi_kill_pending(ss->sc_periph);
splx(s);
/* Nuke the vnodes for any open instances */
mn = SSUNIT(device_unit(self));
vdevgone(cmaj, mn, mn+SSNMINOR-1, VCHR);
return 0;
}
/*
* Perform special action on behalf of the user;
* knows about the internals of this device
*/
int
ssioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
{
struct ss_softc *ss = device_lookup_private(&ss_cd, SSUNIT(dev));
int error = 0;
struct scan_io *sio;
if (!device_is_active(&ss->sc_dev))
return (ENODEV);
switch (cmd) {
case SCIOCGET:
if (ss->special && ss->special->get_params) {
/* call special handler */
error = (ss->special->get_params)(ss);
if (error)
return (error);
} else {
/* XXX add code for SCSI2 scanner, if any */
return (EOPNOTSUPP);
}
memcpy(addr, &ss->sio, sizeof(struct scan_io));
break;
case SCIOCSET:
sio = (struct scan_io *)addr;
if (ss->special && ss->special->set_params) {
/* call special handler */
error = (ss->special->set_params)(ss, sio);
if (error)
return (error);
} else {
/* XXX add code for SCSI2 scanner, if any */
return (EOPNOTSUPP);
}
break;
case SCIOCRESTART:
if (ss->special && ss->special->rewind_scanner ) {
/* call special handler */
error = (ss->special->rewind_scanner)(ss);
if (error)
return (error);
} else
/* XXX add code for SCSI2 scanner, if any */
return (EOPNOTSUPP);
ss->flags &= ~SSF_TRIGGERED;
break;
#ifdef NOTYET
case SCAN_USE_ADF:
break;
#endif
default:
return (scsipi_do_ioctl(ss->sc_periph, dev, cmd, addr,
flag, l));
}
return (error);
}
/*
* Actually translate the requested transfer into one the physical
* driver can understand The transfer is described by a buf and will
* include only one physical transfer.
*/
static void
ssstrategy(struct buf *bp)
{
struct ss_softc *ss = device_lookup_private(&ss_cd, SSUNIT(bp->b_dev));
struct scsipi_periph *periph = ss->sc_periph;
int s;
SC_DEBUG(ss->sc_periph, SCSIPI_DB1,
("ssstrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount,
bp->b_blkno));
/* If the device has been made invalid, error out */
if (!device_is_active(ss->sc_dev)) {
if (periph->periph_flags & PERIPH_OPEN)
bp->b_error = EIO;
else
bp->b_error = ENODEV;
goto done;
}
/* If negative offset, error */
if (bp->b_blkno < 0) {
bp->b_error = EINVAL;
goto done;
}
if (bp->b_bcount > ss->sio.scan_window_size)
bp->b_bcount = ss->sio.scan_window_size;
/* If it's a null transfer, return immediatly */
if (bp->b_bcount == 0)
goto done;
s = splbio();
/*
* Place it in the queue of activities for this scanner
* at the end (a bit silly because we only have on user..
* (but it could fork()))
*/
bufq_put(ss->buf_queue, bp);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
* (All a bit silly if we're only allowing 1 open but..)
*/
ssstart(ss->sc_periph);
splx(s);
return;
done:
/* Correctly set the buf to indicate a completed xfer */
bp->b_resid = bp->b_bcount;
biodone(bp);
}
/*
* trim the size of the transfer if needed, called by physio
* basically the smaller of our min and the scsi driver's minphys
*/
static void
ssminphys(struct buf *bp)
{
struct ss_softc *ss = device_lookup_private(&ss_cd, SSUNIT(bp->b_dev));
struct scsipi_periph *periph = ss->sc_periph;
scsipi_adapter_minphys(periph->periph_channel, bp);
/*
* trim the transfer further for special devices this is
* because some scanners only read multiples of a line at a
* time, also some cannot disconnect, so the read must be
* short enough to happen quickly
*/
if (ss->special && ss->special->minphys)
(ss->special->minphys)(ss, bp);
}
/*
* Do a read on a device for a user process.
* Prime scanner at start of read, check uio values, call ssstrategy
* via physio for the actual transfer.
*/
static int
ssread(dev_t dev, struct uio *uio, int flag)
{
struct ss_softc *ss = device_lookup_private(&ss_cd, SSUNIT(dev));
int error;
if (!device_is_active(ss->sc_dev))
return ENODEV;
/* if the scanner has not yet been started, do it now */
if (!(ss->flags & SSF_TRIGGERED)) {
if (ss->special && ss->special->trigger_scanner) {
error = (ss->special->trigger_scanner)(ss);
if (error)
return (error);
}
ss->flags |= SSF_TRIGGERED;
}
return physio(ssstrategy, NULL, dev, B_READ, ssminphys, uio);
}
/* open the device. */
static int
ssopen(dev_t dev, int flag, int mode, struct lwp *l)
{
int unit;
u_int ssmode;
int error;
struct ss_softc *ss;
struct scsipi_periph *periph;
struct scsipi_adapter *adapt;
unit = SSUNIT(dev);
ss = device_lookup_private(&ss_cd, unit);
if (ss == NULL)
return ENXIO;
if (!device_is_active(ss->sc_dev))
return ENODEV;
ssmode = SSMODE(dev);
periph = ss->sc_periph;
adapt = periph->periph_channel->chan_adapter;
SC_DEBUG(periph, SCSIPI_DB1,
("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit,
ss_cd.cd_ndevs));
if (periph->periph_flags & PERIPH_OPEN) {
aprint_error_dev(ss->sc_dev, "already open\n");
return EBUSY;
}
if ((error = scsipi_adapter_addref(adapt)) != 0)
return error;
/*
* Catch any unit attention errors.
*
* XS_CTL_IGNORE_MEDIA_CHANGE: when you have an ADF, some scanners
* consider paper to be a changeable media
*
*/
error = scsipi_test_unit_ready(periph,
XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_IGNORE_ILLEGAL_REQUEST |
(ssmode == MODE_CONTROL ? XS_CTL_IGNORE_NOT_READY : 0));
if (error)
goto bad;
periph->periph_flags |= PERIPH_OPEN; /* unit attn now errors */
/*
* If the mode is 3 (e.g. minor = 3,7,11,15)
* then the device has been opened to set defaults
* This mode does NOT ALLOW I/O, only ioctls
*/
if (ssmode == MODE_CONTROL)
return 0;
SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n"));
return 0;
bad:
scsipi_adapter_delref(adapt);
periph->periph_flags &= ~PERIPH_OPEN;
return error;
}
