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

[Hannes Schmelzer <hannes@schmelzer.or.at>]

Hi there,

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.

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@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.