Re: [Gumstix-users] EHCI troubleshooting help

[Ben K. <ben...@ka...>]

Krishna Sagiraju <sagiraju <at> gmail.com> writes:

> 
> Florian, First of all thanks for the help. Please see my responses in line...
> 
> > For me it looks like a hardware problem. I've just done my own board and USB
> > is working fine. So a few questions to try helping you:
> >
> > - Have you tried your hub with a dev board from gumstix?
> Yes. Same kernel on fire+Summit works fine. This is certainly a
> problem with my board.
> 
> > - Have you tried another hardware (flash storage, wifi stick) with your
> > board?
> 
> It gives me the same message no matter what I plug in.
> 
> > - When routing your board, have you paid enough attention to the
> > differential data lines (D+,D-). This is crucial, as signals are running at
> > 480 MHz. This is not RF, but enough to have problems if you don't do your
> > differential routing well enough. Are you using a two layers or four layers
> > PCB?
> 
> It's a 4 layer board with the top and bot layers used for routing and
> layer2 is vcc layer3 is gnd. On debugging further late yesterday
> night, I found that the DM and DP lines may be swapped, I'm guessing
> this is the problem. I need to figure out how I can test the fix with
> out ordering a new board, just to see if that's indeed the problem.
> 
> I'll google tips for differential routing tips and see if I messed 
something...
> 
> > - How do you power the USB port?
> TPS61202
> 
> > - How did you grounded the USB connector?
> Connected to the ground plane.
> 
> > - Have you soldered your board by hand or reflow soldering (you can have
> > problems if your solders are not good enough)
> >
> Reflowed.  I split one end of a usb cable and checked the connectivity
> and it's fine.
> 
> --Krishna/.

Krishna,

Did you end up solving your problem?  I am having the same problem.


# echo 8 > /proc/sys/kernel/printk
# hub 1-0:1.0: state 7 ports 3 chg 0000 evt 0004
ehci-omap ehci-omap.0: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT
hub 1-0:1.0: port 2, status 0501, change 0001, 480 Mb/s
hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501
ehci-omap ehci-omap.0: port 2 high speed
ehci-omap ehci-omap.0: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT
usb 1-2: new high speed USB device using ehci-omap and address 2
ehci-omap ehci-omap.0: port 2 high speed
ehci-omap ehci-omap.0: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT
usb 1-2: udev 2, busnum 1, minor = 1
usb 1-2: New USB device found, idVendor=0424, idProduct=2640
usb 1-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-2: uevent
usb 1-2: usb_probe_device
usb 1-2: configuration #1 chosen from 1 choice
usb 1-2: adding 1-2:1.0 (config #1, interface 0)
usb 1-2:1.0: uevent
hub 1-2:1.0: usb_probe_interface
hub 1-2:1.0: usb_probe_interface - got id
hub 1-2:1.0: USB hub found
hub 1-2:1.0: 3 ports detected
hub 1-2:1.0: compound device; port removable status: FRR
hub 1-2:1.0: individual port power switching
hub 1-2:1.0: individual port over-current protection
hub 1-2:1.0: Single TT
hub 1-2:1.0: TT requires at most 8 FS bit times (666 ns)
hub 1-2:1.0: power on to power good time: 100ms
hub 1-2:1.0: local power source is good
hub 1-2:1.0: enabling power on all ports
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 1
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 2
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 3
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 4
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 5
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 6
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 7
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 8
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 9
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 10
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 11
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 12
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 13
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 14
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 15
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 16
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 17
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 18
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 19
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 20
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 21
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 22
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 23
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 24
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 25
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 26
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 27
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 28
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 29
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 30
ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 31
ehci-omap ehci-omap.0: devpath 2 ep0out 3strikes
drivers/usb/core/inode.c: creating file '002'
hub 1-0:1.0: state 7 ports 3 chg 0000 evt 0004
ehci-omap ehci-omap.0: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT
hub 1-0:1.0: port 2, status 0501, change 0001, 480 Mb/s
usb 1-2: USB disconnect, address 2
usb 1-2: unregistering device
usb 1-2: usb_disable_device nuking all URBs
usb 1-2: unregistering interface 1-2:1.0
hub 1-2:1.0: hub_port_status failed (err = -19)
hub 1-2:1.0: hub_port_status failed (err = -19)
hub 1-2:1.0: hub_port_status failed (err = -19)
hub 1-2:1.0: activate --> -19
usb 1-2:1.0: uevent
usb 1-2: uevent

Ben