On Wednesday, February 03, 2016 at 08:40:00 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.
In that case, debug time.
Usual problems are bad routing of the tracks on the board , so try with USB 1.1 hub and if that works, that's your problem.
You can also try "setenv usb_pgood_delay 10000" , this will increase the time the code takes after reseting root port.
Also try adding #define DEBUG to drivers/usb/host/ehci-hcd.c common/usb.c and common/usb_hub.c . You might notice something odd there.
The above output shows that your qTD tokens are not processed , see the active bit being set. Details in [1] page 54 (Table 3-16).
[1] http://www.intel.com/content/dam/www/public/us/en/documents/technical- specifications/ehci-specification-for-usb.pdf