Re: i.MX21 USB driver - hub 1-0:1.0: Cannot enable port 2. Maybe the USB cable is bad?
"Midhun A" <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
Hi All, > > It's probably a device/board problem. > I am investigating this problem. I have the following observations: 1. As soon as I plug in my flash drive, the port status is 0x103 - which I could find from the USB specification that the port is powered (bit 8), port is enabled (bit 1) and that a device has been connected to the port (bit 0). The port status change bits are 0x0. 2. The kernel then says: "usb 1-2: new full speed USB device using imx21-hc and address 2" 3. The system now tries to read the port status again and it gets 0x101 - which is port is powered (bit 8) and device is connected to the port (bit 0). But the port status change are 0x12 - which is port reset is complete (bit 4) and PORT IS DISABLED DUE to Port_Error condition (bit 1). I want to know what this Port_Error condition is. I have read section 11.8 of the specification. But it does not say how to resolve this error. Any information regarding solving this error will be helpful. Thanks, Midhun. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel