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

[Schrempf Frieder <frieder.schrempf@exceet.de>]

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.