1.Dd March 2, 1995
2.Dt PT 4
3.Os FreeBSD
4.Sh NAME
5.Nm pt
| 1.Dd March 2, 1995
2.Dt PT 4
3.Os FreeBSD
4.Sh NAME
5.Nm pt
|
6.Nd scsi processor type driver
| 6.Nd SCSI processor type driver
|
7.Sh SYNOPSIS
| 7.Sh SYNOPSIS
|
8.Nm device pt0 at scbus?
| 8.Cd device pt0 at scbus?
|
9.Sh DESCRIPTION
10The
| 9.Sh DESCRIPTION
10The
|
11.Xr pt
| 11.Nm
|
12driver provides support for a
| 12driver provides support for a
|
13SCSI processor type device. These are usually scanners and other
14devices using the SCSI link as a communication interface with device
| 13.Tn SCSI
14processor type device. These are usually scanners and other
15devices using the
16.Tn SCSI
17link as a communication interface with device
|
15specific commands embedded in the data stream.
16.Pp
| 18specific commands embedded in the data stream.
19.Pp
|
17A scsi adapter must be separately configured into the system
| 20A
21.Tn SCSI
22adapter must be separately configured into the system
|
18before this driver can be used.
19.Pp
20This device only supports
21.Xr read 2
22and
23.Xr write 2 ,
| 23before this driver can be used.
24.Pp
25This device only supports
26.Xr read 2
27and
28.Xr write 2 ,
|
24and the general scsi ioctl calls.
25.Sh IOCTLS
26The
27.Nm
28driver has no ioctls of it's own but rather acts as a medium for the
29generic
30.Xr scsi 4
31ioctls. These are described in
32.Em sys/scsiio.h.
33.Sh FILES
34.Bl -tag -width /dev/pt -compact
35.It Pa /dev/pt[0-255]
36pt{x} is the 'xth' processor device.
37.El
38.Sh DIAGNOSTICS
| 29and the generic
30.Tn SCSI
31.Xr ioctl 2
32calls.
|
39The
| 33The
|
40.Em "at scbus?"
| 34.Sq Li at scbus?
|
41is required in the config file for the configuration
42system to know this is a SCSI device and generate the appropriate
43tables.
44.Pp
| 35is required in the config file for the configuration
36system to know this is a SCSI device and generate the appropriate
37tables.
38.Pp
|
45The 0 in
46.Em pt0
| 39The
40.Sq Li 0
41in
42.Sq Li pt0
|
47in the configuration is required.
| 43in the configuration is required.
|
48This is a bug in
| 44This is a deficiency in
|
49.Xr config 8 .
| 45.Xr config 8 .
|
50.Pp
| 46.Sh IOCTLS
47The
48.Nm
49driver has no
50.Fn ioctl
51commands of its own but rather acts as a medium for the
52generic
53.Xr scsi 4
54commands. These are described in
55.Aq Pa sys/scsiio.h .
|
51All
52.Xr scsi 4
53debug ioctls work on
54.Nm
55devices.
| 56All
57.Xr scsi 4
58debug ioctls work on
59.Nm
60devices.
|
| 61.Sh FILES
62.Bl -tag -width /dev/ptQQQ -compact
63.It Pa /dev/pt Ns Ar N
64the
65.No Ar N Ns th processor device.
66.El
|
56.Sh SEE ALSO
| 67.Sh SEE ALSO
|
57.Xr sd 4
58.Xr st 4
59.Xr cd 4
60.Xr ch 4
61.Xr su 4
| |
62.Xr scsi 4
63.Sh HISTORY
64The
65.Nm
| 68.Xr scsi 4
69.Sh HISTORY
70The
71.Nm
|
66driver appeared in FreeBSD 2.1
| 72driver appeared in
73.Tn FreeBSD
742.1.
|
| |