[U-Boot] R: R: USB EHCI driver

[Mike Timmons]

All,
I'm having trouble resetting my USB (virtual) root port hub following
high speed handshake on the 5121e using USB0+UTMI on the mpc5121e. If
anyone has any idea why root port hub reset typically fails, please
advise. Thanks!

Francesco,

Thank you for your efforts on usb for the 5121e! I took your patch
last week and applied it to u-boot-2009.06 the patch wasn't a perfect
fit for some reason, but it was easy enough for me to extract the code
from your patch file. What version did you intend the patch for, if
not u-boot-2009.06?

Regardless, I'm using a custom board based off the the ADS512101
board. I complete your initialization step and it appears I get the
5121e registers mapped correctly. "USB start" looks for devices, and I
do see debug output to the console when I have a USB memory stick
plugged in.

I also have a USB analyzer, so I can see some action on the bus. However...

It appears I am failing to reset the root port hub after the
high-speed handshake between host and device (memory stick).

My degree of USB ignorance is a painful limitation at this point. I'm
tripping-through specs, the register set, and getting somewhat
familiar with the sequencing, but I'm grinding my gears at this point.

I attach a console log dump. A snippet of the log appears below,
showing where/why the reset fails. I also attach a screen snap of my
USB analyzer showing that some action is occurring on the wire between
the host and the device (memory stick).

This root port hub reset issue appears to be killing any subsequent
device discovery efforts. I DID try the hack of ignoring the reset
failure to see what happens. In this case I do see "2 devices"
detected in the console log (root hub plus my stick I presume), but I
see no additional bus traffic on the analyzer so I figure the reset
failure is my smoking gun.


Any ideas?

console log snippet (see attached full console log dump)

hub_port_reset: resetting port 0...
usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
req=3 (0x3), type=35 (0x23), value=4, index=1
Len is 0
usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
req=0 (0x0), type=163 (0xa3), value=0, index=1
portstatus 101, change 13, 12 Mb/s
STAT_C_CONNECTION = 1 STAT_CONNECTION = 1  USB_PORT_STAT_ENABLE 0
cannot reset port 1!?
port 1 reset change
usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x
0
req=1 (0x1), type=35 (0x23), value=20, index=1
Len is 0
1 USB Device(s) found
       scanning bus for storage devices... i=0
i=1
0 Storage Device(s) found
=>





> On Wed, Jun 24, 2009 at 4:08 AM, Rendine Francesco <Francesco.Rendine at valueteam.com> wrote:
>>
>> Hi,
>>
>> thanks for your compliments, but I think that there is some work to do about this driver to support OTG mode and gadget mode.
>> For now I enabled support to host mode, and from my test does it work.
>>
>> I'm preparing the patch, and this will carry away some days because usb u-boot source code is been re-organized..
>> I developed my patch on u-boot 2009.03, so I have to port my job on last u-boot version.
>>
>> Regards,
>> Francesco
>>
>> -----Messaggio originale-----
>> Da: Detlev Zundel [mailto:dzu at denx.de]
>> Inviato: mer 6/24/2009 10:51
>> A: Rendine Francesco
>> Cc: Michael Trimarchi; Gupta Maneesh-B18878; u-boot at lists.denx.de
>> Oggetto: Re: [U-Boot] R:  USB EHCI driver
>>
>> Hi Francesco,
>>
>> > I'm successful in provide a preliminary support to EHCI USB Freescale
>> > controller integrated on ADS5121 platform.  I'm preparing a patch to
>> > submit to u-boot mailing list.
>>
>> Congratulations - I'm also looking forward to see and test the patch on
>> our ads5121.
>>
>> Cheers
>>  Detlev
>>
>> --
>> More than any other time in history, mankind faces a crossroads.  One
>> path leads  to despair  and utter  hopelessness.   The other to total
>> extinction.  Let us pray, we have the wisdom to choose correctly.
>>                                        -- Woody Allen
>> --
>> DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
>> HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>> Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de
>>
>>
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>