2009-05-04 06:07:19 Bf527 USB Host Problems
Harbhajan Singh (INDIA)
Message: 73554
Hi,
I am working with the uClinux trunk distribution and Bf527 rev 0.2 board.
I have enabled the SOC host controller and USB Mass storage driver and I am able to mount the file system and able to do write and read operations.
I have disabled the USB Mass storage driver and after booting the kernel When i connect the Sandisk usb device(USB flash disk)
I got the following information.
root:/> usb 1-1: new high speed USB device using musb_hdrc and address 2
usb 1-1: configuration #1 chosen from 1 choice
usb 1-1: New USB device found, idVendor=0781, idProduct=5406
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: U3 Cruzer Micro
usb 1-1: Manufacturer: SanDisk
usb 1-1: SerialNumber: 4320330EF7C21035
libusual: modprobe for usb-storage succeeded, but module is not present
Same kernel after booting if I connect a usb based WiFi card it is not enumerating and it shows the following details.
root:/> usb 1-1: new high speed USB device using musb_hdrc and address 2
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new high speed USB device using musb_hdrc and address 3
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new high speed USB device using musb_hdrc and address 4
musb_h_tx_flush_fifo 124: Could not flush host TX fifo: csr: 000a
musb_h_tx_flush_fifo 124: Could not flush host TX fifo: csr: 000a
usb 1-1: device not accepting address 4, error -110
usb 1-1: new high speed USB device using musb_hdrc and address 5
musb_h_tx_flush_fifo 124: Could not flush host TX fifo: csr: 000a
musb_h_tx_flush_fifo 124: Could not flush host TX fifo: csr: 000a
usb 1-1: device not accepting address 5, error -110
hub 1-0:1.0: unable to enumerate USB device on port 1
how to resolve this issue, so that soc host controller can do the basic enumration of any class of usb devices.
Thanks and Regards,Harbhajan
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2009-05-04 06:25:52 Re: Bf527 USB Host Problems
Sonic Zhang (CHINA)
Message: 73555
What kernel release do you use?
If you disabled the USB Mass storage driver from kernel, you of course can't find the module.
Did you built the USB wifi driver into your kernel?
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2009-05-04 06:48:55 Re: Bf527 USB Host Problems
Michael Hennerich (GERMANY)
Message: 73556
Some time ago I debugged this USB Enumeration issues seen with some USB Gadgets on EZKITs.
The problem is that the VBUS Voltage drops below 4.40 Volt during device initialization.
Causing a Blackfin USB VBUS_ERROR and the device on the other end of the side to malfunction.
The voltage drop is due to missing capacitance on the VBUS supply.
A simple 100uF Low ESR across VBUS fixes the problems.
See atached picture
-Michael
BF527-EZKIT_USB_VBUS.jpg
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2009-05-04 11:56:29 Re: Bf527 USB Host Problems
Appalayagari Sreedhar (INDIA)
Message: 73574 Hi Micheal and Micheal,
Thankyou very much.
Could you please tell me is there any USB based WiFi driver in the uClinux
distribution so that I want to test my USB based WiFi card.
With SOC Host Controller in BF527.
Best Regards, Harbhajan
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2009-05-05 03:22:49 Re: Bf527 USB Host Problems
Michael Hennerich (GERMANY)
Message: 73618 I used the Ralink rt2501/rt73 (USB) drivers with Ralink chipset based
adaptors successfully. (for example: D-Link DWL-G122)
The drivers are mainlined and available in our svn trunk.
-Michael
