On Wed, Feb 4, 2009 at 1:55 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Tue, 3 Feb 2009, Silesh C V wrote: > >> Hi all , >> >> I am trying to use an OMAP3430 (MUSB controller )based board as a >> USB mass storage device.I am using kernel 2.6.28 on the gadget side. >> Enumeration happens fine , the mass storage driver gets loaded and >> udev creates the /dev entry for the disk.But the disk(which is an MMC >> card plugged into the board) > > I guess you mean that the backing storage is an MMC card. Yes > >> does not get mounted and after some time >> the gadget gets reset.A manual mount hangs.I have tested this with hosts >> running Linux 2.6.23, 2.6.26 , 2.6.29-rc3 and Windows.Please see some >> debug messages from host/gadget below.I have attached an usbmon o/p also. > > The logs indicate that your MMC card isn't working right. Attempts to > read sector 3967984 don't succeed, even though the kernel thinks the > card has 3967992 sectors. But the same MMC card works fine when I use kernel 2.6.26 in the gadget. The disk (card) gets mounted on the host(Linux and Windows) and becomes usable.I have attached the messages and usbmon o/p for the same set up (board+MMC card+cable+host) with 2.6.26 kernel running in the gadget. > You can test this yourself from the > command line on the gadget; just do: > > dd if=/dev/mmc... of=/dev/null count=1 skip=3967984 I did this and got : dd if=/dev/mmcblk0p1 of=/dev/null count=1 skip=3967984 1+0 records in 1+0 records out > > Alan Stern > > Thanks, Silesh. ------------------------------------------------------------------------------------------------------------------------ /var/log/messages: Feb 4 11:00:27 work kernel: [ 4056.609228] usb 1-5: new high speed USB device using ehci_hcd and address 5 Feb 4 11:00:27 work kernel: [ 4056.821242] usb 1-5: New USB device found, idVendor=0525, idProduct=a4a5 Feb 4 11:00:27 work kernel: [ 4056.821245] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Feb 4 11:00:27 work kernel: [ 4056.821248] usb 1-5: Product: File-backed Storage Gadget Feb 4 11:00:27 work kernel: [ 4056.821250] usb 1-5: Manufacturer: Linux 2.6.26-omap with musb_hdrc Feb 4 11:00:27 work kernel: [ 4056.821251] usb 1-5: SerialNumber: 372041756775 Feb 4 11:00:27 work kernel: [ 4056.828488] usb 1-5: configuration #1 chosen from 1 choice Feb 4 11:00:27 work kernel: [ 4056.878092] scsi7 : SCSI emulation for USB Mass Storage devices Feb 4 11:00:32 work kernel: [ 4061.930086] scsi 7:0:0:0: Direct-Access Linux File-Stor Gadget 0316 PQ: 0 ANSI: 2 Feb 4 11:00:33 work kernel: [ 4062.018593] sd 7:0:0:0: [sdb] 3967992 512-byte hardware sectors: (2.03 GB/1.89 GiB) Feb 4 11:00:33 work kernel: [ 4062.041930] sd 7:0:0:0: [sdb] Write Protect is off Feb 4 11:00:33 work kernel: [ 4062.041934] sd 7:0:0:0: [sdb] Assuming drive cache: write through Feb 4 11:00:33 work kernel: [ 4062.080716] sd 7:0:0:0: [sdb] 3967992 512-byte hardware sectors: (2.03 GB/1.89 GiB) Feb 4 11:00:33 work kernel: [ 4062.113823] sd 7:0:0:0: [sdb] Write Protect is off Feb 4 11:00:33 work kernel: [ 4062.113831] sd 7:0:0:0: [sdb] Assuming drive cache: write through Feb 4 11:00:33 work kernel: [ 4062.113836] sdb:<7>usb-storage: queuecommand called Feb 4 11:00:33 work kernel: [ 4062.131209] Feb 4 11:00:33 work kernel: [ 4062.138264] sd 7:0:0:0: [sdb] Attached SCSI disk Feb 4 11:00:33 work kernel: [ 4062.141073] sd 7:0:0:0: Attached scsi generic sg2 type 0 Feb 4 11:00:34 work hald: mounted /dev/sdb on behalf of uid 500 ------------------------------------------------------------------------------------------------------------------------------- /proc/bus/usb/devices: T: Bus=01 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#= 5 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0525 ProdID=a4a5 Rev= 3.16 S: Manufacturer=Linux 2.6.26-omap-with musb_hdrc S: Product=File-backed Storage Gadget S: SerialNumber=372041756775 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=125us ------------------------------------------------------------------------------------------------------------------------------------
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