Hello,
Recently we moved to FC3 (2.6.10) from RH9 (2.4.23). I have a board with a USB hub (Philips ISP1521 BE) with some chips behind it. In 2.6.10, USB driver doesn't recognize the chips behind the controller. But, the same board works fine with 2.4.23.
I went into the driver, and came to know that this hub was returning (1011 0010) as wHubCharacteristics, and pPwrOn2PwrGood as 0. This hub is a powered hub (doesn't draw power from bus), and high speed. I only use all high speed, so I guess TT's do not come into picture.
The driver used to recognize only the hub - nothing else behind it. So, I changed the wHubCharacteristics with a proper value whenever I found this device (for a temporary fix). Now, I can see behind this hub.
But, I am getting a few (very infrequent) "port x disabled by hub (EMI?), re-enabling.." messages. I didn't get much information in the code/specs about the reason.
I am very new to USB. I appreciate if someone could tell me what's going on.
Thanks.
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