[src/trunk]: src/sys/dev/usb Mention that I found protocol info in the Linux ...

[augustss <augustss%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e0158b57866f
branches:  trunk
changeset: 502069:e0158b57866f
user:      augustss <augustss%NetBSD.org@localhost>
date:      Thu Jan 11 06:33:22 2001 +0000

description:
Mention that I found protocol info in the Linux driver.

diffstat:

 sys/dev/usb/usscanner.c |  24 ++++++++++++++++++++----
 1 files changed, 20 insertions(+), 4 deletions(-)

diffs (62 lines):

diff -r 605dda59dda2 -r e0158b57866f sys/dev/usb/usscanner.c
--- a/sys/dev/usb/usscanner.c   Thu Jan 11 06:20:04 2001 +0000
+++ b/sys/dev/usb/usscanner.c   Thu Jan 11 06:33:22 2001 +0000
@@ -1,7 +1,7 @@
-/*     $NetBSD: usscanner.c,v 1.2 2001/01/11 06:20:04 augustss Exp $   */
+/*     $NetBSD: usscanner.c,v 1.3 2001/01/11 06:33:22 augustss Exp $   */
 
 /*
- * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
  * This code is derived from software contributed to The NetBSD Foundation
@@ -40,6 +40,18 @@
  * This driver is partly based on information taken from the Linux driver
  * by John Fremlin, Oliver Neukum, and Jeremy Hall.
  */
+/*
+ * Protocol:
+ * Send raw SCSI command on the bulk-out pipe.
+ * If output command then
+ *     send further data on the bulk-out pipe
+ * else if input command then
+ *     read data on the bulk-in pipe
+ * else
+ *     don't do anything.
+ * Read status byte on the interrupt pipe (which doesn't seem to be
+ * an interrupt pipe at all).  This operations sometimes times out.
+ */
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -447,7 +459,11 @@
        if (sc->sc_state != UAS_STATUS) {
                printf("%s: !UAS_STATUS\n", USBDEVNAME(sc->sc_dev));
        }
+       if (sc->sc_status != 0) {
+               printf("%s: status byte=0x%02x\n", USBDEVNAME(sc->sc_dev), sc->sc_status);
+       }
 #endif
+       /* XXX what should we do on non-0 status */
 
        sc->sc_state = UAS_IDLE;
                
@@ -556,7 +572,7 @@
 
 Static void
 usscanner_sensecmd_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
-               usbd_status status)
+                     usbd_status status)
 {
        struct usscanner_softc *sc = priv;
        struct scsipi_xfer *xs = sc->sc_xs;
@@ -601,7 +617,7 @@
 
 Static void
 usscanner_cmd_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
-               usbd_status status)
+                usbd_status status)
 {
        struct usscanner_softc *sc = priv;
        struct scsipi_xfer *xs = sc->sc_xs;