Re: Option N.V. Wireless WAN modem driver

[Iain Hibbert <plunky%rya-online.net@localhost>]

On Tue, 28 Jul 2009, David Young wrote:

> On Mon, Jul 27, 2009 at 09:02:05AM +0100, Iain Hibbert wrote:
> > The devices initially attach as umass with the windows etc drivers on (I
> > did not manage to mount the fs though) and after a SCSI REZERO_UNIT
> > command will detach and reattach as the modem. I see that some other
> > drivers handle the transition automatically but I find that a little
> > distasteful and would prefer to have some kind of hotplug manager for
> > that. Any news on that devd?
>
> How do you send the SCSI REZERO_UNIT command?  It isn't mentioned in
> scsictl(8), but I may be looking for the wrong thing.

Sorry yeah I forgot about that, I added it to scsictl(8)

iain

Index: scsictl.8
===================================================================
RCS file: /cvsroot/src/sbin/scsictl/scsictl.8,v
retrieving revision 1.25
diff -u -r1.25 scsictl.8
--- scsictl.8   30 Apr 2008 13:10:53 -0000      1.25
+++ scsictl.8   29 Jul 2009 07:30:19 -0000
@@ -28,7 +28,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd January 22, 2007
+.Dd June 29, 2009
 .Dt SCSICTL 8
 .Os
 .Sh NAME
@@ -150,6 +150,16 @@
 .Li SCIOCRESET
 ioctl.
 .Pp
+.Nm rezero
+.Pp
+Send a
+.Dq REZERO UNIT
+command to the device.
+This is useful for devices that initially attach as a CD-ROM
+containing drivers.
+Upon receipt of this command, such devices may detach from the
+bus and reattach as a different type of device.
+.Pp
 .Nm start
 .Pp
 Send a
Index: scsictl.c
===================================================================
RCS file: /cvsroot/src/sbin/scsictl/scsictl.c,v
retrieving revision 1.31
diff -u -r1.31 scsictl.c
--- scsictl.c   28 Apr 2008 20:23:09 -0000      1.31
+++ scsictl.c   29 Jul 2009 07:30:20 -0000
@@ -82,6 +82,7 @@
 void   device_release(int, char *[]);
 void   device_reserve(int, char *[]);
 void   device_reset(int, char *[]);
+void   device_rezero(int, char *[]);
 void   device_debug(int, char *[]);
 void   device_prevent(int, char *[]);
 void   device_allow(int, char *[]);
@@ -102,6 +103,7 @@
        { "release",    "",                     device_release },
        { "reserve",    "",                     device_reserve },
        { "reset",      "",                     device_reset },
+       { "rezero",     "",                     device_rezero },
        { "debug",      "level",                device_debug },
        { "prevent",    "",                     device_prevent },
        { "allow",      "",                     device_allow },
@@ -807,6 +809,29 @@
 }

 /*
+ * device_rezero:
+ *
+ *     Issue a REZERO command to a SCSI device.
+ */
+void
+device_rezero(int argc, char *argv[])
+{
+       struct scsi_rezero_unit cmd;
+
+       /* No arguments. */
+       if (argc != 0)
+               usage();
+
+       memset(&cmd, 0, sizeof(cmd));
+
+       cmd.opcode = SCSI_REZERO_UNIT;
+
+       scsi_command(fd, &cmd, sizeof(cmd), NULL, 0, 10000, 0);
+
+       return;
+}
+
+/*
  * device_debug:
  *
  *     Set debug level to a SCSI device.