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Date: Sat, 30 Sep 2006 09:38:17 +0200
From: Bárður Árantsson <spam@...entician.net>
To: linux-kernel@...r.kernel.org
Subject: USB resets with Nokia 6131 in Data Storage mode
Hi all,
I'm having some problems using a Nokia 6131 in 'Data Storage' mode, i.e.
when it acts as a USB mass storage device. This is with a Gentoo patched
kernel 2.6.18, but AFAICT there are no patches against the USB subsystem
in Gentoo's version of the kernel.
The symptoms: The system scans the partitions fine, I can mount the
device and see the directory contents fine, but when I try to actually
transfer files the USB subsystem seems to be doing bus resets
continually until either of the sides simply gives up; I think it may be
the phone that simply goes out of data storage mode into normal mode
after a number of resets (or a fixed amount of time with no data transfer).
I've done a run with all the above steps with USB mass storage verbose
debug enabled, the log can be retrieved from here:
http://imada.sdu.dk/~bardur/usb-storage.log.gz
The thing I that my untrained eye noticed was that most of the small
transfers seem to succeed (at least before the bus resets kick in),
while all the large transfers fail. This of course explains why reading
the partition table and directory contents works.
Here's the phone's lsusb -v data:
> Bus 002 Device 004: ID 0421:047c Nokia Mobile Phones
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 64
> idVendor 0x0421 Nokia Mobile Phones
> idProduct 0x047c
> bcdDevice 3.70
> iManufacturer 1 Nokia
> iProduct 2 Nokia 6131
> iSerial 3 359390005710019
> bNumConfigurations 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 32
> bNumInterfaces 1
> bConfigurationValue 1
> iConfiguration 0
> bmAttributes 0xc0
> Self Powered
> MaxPower 8mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 8 Mass Storage
> bInterfaceSubClass 6 SCSI
> bInterfaceProtocol 80 Bulk (Zip)
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 0
(I should note that the product ID changes to 0x47b when the phone is
NOT in data storage mode just in case it matters.)
Does anyone have any clues to impart or anything I can try to make it work?
--
Bardur Arantsson
<bardurREMOVE@...Sscientician.net>
- Sometimes it's hard to see your own face without a mirror.
Dr. Phil, 'Dr. Phil'
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