[oe-issues] [Bug 1619] New: Akita does not function as a USB storage device

Sat Nov 25 23:53:48 UTC 2006

http://bugs.openembedded.org/show_bug.cgi?id=1619

           Summary: Akita does not function as a USB storage device
           Product: Openembedded
           Version: OpenZaurus 3.5.4.x
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Distributions
        AssignedTo: openembedded-issues at lists.openembedded.org
        ReportedBy: armagon_ca at yahoo.ca
         QAContact: tinderbox-oe at gmx.net

Summary
-------

I am unable to make my Sharp Zaurus C1000 (Akita) function as a USB Storage
Device.  This would be handy for all major OSes can read from USB Storage
devices, such as cameras, card readers, and memory sticks.

I believe that this bug is a known issue (which I could not find in the bug
database), and it may affect all handhelds using a pxa27x processor.

Steps To Reproduce
------------------

1. Make sure your handheld is not connected via USB-Cable to your PC.

2. You will need a device-file that you can mount as the storage area.  It
should be possible to use your SD or CF card -- the whole thing -- or to create
a loop-back filesystem on it to use for this purpose, following the
instructions at: http://www.linux-usb.org/gadget/file_storage.html.  [I opted
to create a 16 MB loop-back file for this purpose, and I formatted it with
FAT.]

3. Make sure you don't have any USB-gadget modules active.  Do a 'lsmod | grep
g_' to check, and if anything comes up, 'rmmod <thing-that-came-up>'. 

4. Active the g_file_storage module.  I did this: 'modprobe g_file_storage
file=/media/card/misc/share'

5. Plug in the USB cable between your handheld and your PC.

Expected Result
---------------

Your PC will see a USB storage device, and possibly offer to automatically
mount it, or, in any case, allow you to mount it.  At this point, you can
transfer files from the PC to the Handheld.

Actual Result
-------------

I found that the PC kepts resetting the USB connection.

On my handheld, running 'dmesg' yielded this output after activating the module
but before plugging in the USB cable.

g_file_storage gadget: File-backed Storage Gadget, version: 28 November 2005
g_file_storage gadget: Number of LUNs=1
g_file_storage gadget-lun0: ro=0, file: /media/card/misc/share

After I plugged in the cable, I saw this from 'dmesg':

udc: USB reset
udc: USB reset
udc: USB reset
udc: USB reset
udc: USB reset
udc: USB reset
udc: USB reset
udc: USB reset
g_file_storage gadget: full speed config #1
udc: USB reset
[above line is repeated several times]

A little later I looked again, and all I saw were lines saying 'udc: USB
reset'.

On my PC, which is running kubuntu 6.06, the kernel logs had this to say:

Nov 25 15:15:54 carrot kernel: [17688643.040000] ohci_hcd 0000:00:02.3: wakeup
Nov 25 15:15:54 carrot kernel: [17688643.424000] usb 2-1: new full speed USB
device using ohci_hcd and address 5
Nov 25 15:15:54 carrot kernel: [17688643.644000] scsi2 : SCSI emulation for USB
Mass Storage devices
Nov 25 15:15:54 carrot kernel: [17688643.644000] usb-storage: device found at 5
Nov 25 15:15:54 carrot kernel: [17688643.644000] usb-storage: waiting for
device to settle before scanning
Nov 25 15:15:59 carrot kernel: [17688648.652000]   Vendor: Linux     Model:
File-Stor Gadget  Rev: 0311
Nov 25 15:15:59 carrot kernel: [17688648.652000]   Type:   Direct-Access       
              ANSI SCSI revision: 02
Nov 25 15:15:59 carrot kernel: [17688648.672000] SCSI device sda: 32768
512-byte hdwr sectors (17 MB)
Nov 25 15:15:59 carrot kernel: [17688648.672000] sda: assuming drive cache:
write through
Nov 25 15:15:59 carrot kernel: [17688648.684000] SCSI device sda: 32768
512-byte hdwr sectors (17 MB)
Nov 25 15:15:59 carrot kernel: [17688648.684000] sda: assuming drive cache:
write through
Nov 25 15:15:59 carrot kernel: [17688648.684000]  sda: sda1
Nov 25 15:15:59 carrot kernel: [17688648.700000] sd 2:0:0:0: Attached scsi disk
sda
Nov 25 15:15:59 carrot kernel: [17688648.700000] sd 2:0:0:0: Attached scsi
generic sg0 type 0
Nov 25 15:15:59 carrot kernel: [17688648.704000] usb-storage: device scan
complete
Nov 25 15:16:29 carrot kernel: [17688679.052000] usb 2-1: reset full speed USB
device using ohci_hcd and address 5
Nov 25 15:16:40 carrot kernel: [17688689.432000] usb 2-1: reset full speed USB
device using ohci_hcd and address 5
Nov 25 15:16:56 carrot kernel: [17688705.820000] usb 2-1: reset full speed USB
device using ohci_hcd and address 5
Nov 25 15:16:57 carrot kernel: [17688706.204000] usb 2-1: reset full speed USB
device using ohci_hcd and address 5
Nov 25 15:17:07 carrot kernel: [17688716.584000] usb 2-1: reset full speed USB
device using ohci_hcd and address 5
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: scsi: Device
offlined - not ready after error recovery
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: SCSI error: return
code = 0x50000
Nov 25 15:17:07 carrot kernel: [17688716.788000] end_request: I/O error, dev
sda, sector 32640
Nov 25 15:17:07 carrot kernel: [17688716.788000] Buffer I/O error on device
sda, logical block 4080
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.788000] Buffer I/O error on device
sda, logical block 4080
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.788000] Buffer I/O error on device
sda, logical block 4095
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.788000] Buffer I/O error on device
sda, logical block 4095
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.788000] Buffer I/O error on device
sda, logical block 4095
Nov 25 15:17:07 carrot kernel: [17688716.788000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.788000] Buffer I/O error on device
sda, logical block 4095
Nov 25 15:17:07 carrot kernel: [17688716.792000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.792000] Buffer I/O error on device
sda, logical block 4095
Nov 25 15:17:07 carrot kernel: [17688716.792000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.792000] Buffer I/O error on device
sda, logical block 4095
Nov 25 15:17:07 carrot kernel: [17688716.792000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.792000] Buffer I/O error on device
sda, logical block 4088
Nov 25 15:17:07 carrot kernel: [17688716.792000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot kernel: [17688716.792000] Buffer I/O error on device
sda, logical block 4088
Nov 25 15:17:07 carrot kernel: [17688716.792000] sd 2:0:0:0: rejecting I/O to
offline device
Nov 25 15:17:07 carrot last message repeated 27 times

I also tested this with a PC running Windows XP, and got similar results.

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