[U-Boot] Issue with USB mass storage (thumb drives)

[Marek Vasut]

On Wednesday, February 03, 2016 at 08:45:27 AM, Hannes Schmelzer wrote:
> Hi there,

Please do not top-post

> i can osberve same strange thing on Xilinx ZYNQ.
> 
> But really strange is:
> I'm having a couple of USB-sticks on my desk, about 5pcs.
> Exactly one of them is working without any trouble.
> 
> My testfile is ~16MB, with the magic usb-stick i can read the whole 16MB
> without errors.
> With all the other sticks i get this timeouts.

CCing Michal for zynq issues.

> best regards,
> Hannes
> 
> On 02/03/2016 08:40 AM, Schrempf Frieder wrote:
> > On 02.02.2016 17:39, Marek Vasut wrote:
> >> On Tuesday, February 02, 2016 at 05:28:42 PM, Fabio Estevam wrote:
> >>> Adding Marek in case he has any ideas.
> >>> 
> >>> On Tue, Feb 2, 2016 at 8:35 AM, Schrempf Frieder
> >>> 
> >>> <frieder.schrempf at exceet.de> wrote:
> >>>> Hello,
> >>>> 
> >>>> I'm using U-Boot on a custom i.MX6 board and I'm having problems while
> >>>> reading (large) files from USB thumb drives.
> >>>> I wouldn't really mind if this only happened with some specific USB
> >>>> device, but the problem occurs with 3 out of 4 tested thumb drives
> >>>> while loading a 100M test file.
> >>>> The devices that work seem to be rather old ones.
> >>>> 
> >>>> The same issue is also reported here:
> >>>> https://community.freescale.com/thread/377911
> >>>> 
> >>>> I can reproduce this behaviour with u-boot-imx v2014.04 and with
> >>>> mainline u-boot v2015.10 and v2016.01.
> >>>> 
> >>>> Can someone tell me if this is a known issue?
> >>>> What could be the reason for this and how can I get this working?
> >>>> 
> >>>> Thanks!
> >>>> 
> >>>> 
> >>>> U-Boot 2016.01 (Feb 02 2016 - 10:31:32 +0100)
> >>>> 
> >>>> CPU:   Freescale i.MX6SOLO rev1.3 at 792MHz
> >>>> CPU:   Industrial temperature grade (-40C to 105C) at 31C
> >>>> Reset cause: POR
> >>>> Board: MX6EXCEET
> >>>> DRAM:  1 GiB
> >>>> NAND:  256 MiB
> >>>> MMC:   FSL_SDHC: 0, FSL_SDHC: 1
> >>>> SF: Detected EN25Q80 with page size 256 Bytes, erase size 4 KiB, total
> >>>> 1 MiB No panel detected: default to Hannstar-XGA
> >>>> Display: Hannstar-XGA (1024x768)
> >>>> In:    serial
> >>>> Out:   serial
> >>>> Err:   serial
> >>>> Net:   Found Micrel KS8051/KS8081 PHY
> >>>> FEC
> >>>> Hit any key to stop autoboot:  0
> >>>> => usb start
> >>>> starting USB...
> >>>> USB0:   Port not available.
> >>>> USB1:   USB EHCI 1.00
> >>>> scanning bus 1 for devices... 2 USB Device(s) found
> >>>> 
> >>>>           scanning usb for storage devices... 1 Storage Device(s)
> >>>>           found scanning usb for ethernet devices... 0 Ethernet
> >>>>           Device(s) found
> >>>> 
> >>>> => fatload usb 0 0x18000000 test.file
> >>>> reading test.file
> >>>> EHCI timed out on TD - token=0xac008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x128d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x801f8c80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x801f8c80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x801f8c80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x801f8c80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> EHCI timed out on TD - token=0x80008d80
> >>>> Error reading cluster
> >>>> ** Unable to read file test.file **
> >> 
> >> What happens if you do 'dcache off' and then read the file ?
> > 
> > Unfortunately turning off dcache doesn't seem to change the behaviour.
> > I'm still getting the same error messages.

Best regards,
Marek Vasut