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USB device not enumerated by iPXE USB stack
2016-09-14, 13:40
Post: #1
eugenio Offline
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USB device not enumerated by iPXE USB stack
Hi all,

I am working on a customization of iPXE that reads the device ID of the USB devices attached to the system when iPXE runs.

I have found that the USB stack of iPXE does not enumerate a device of one of out customers. In my tests the device is attached to one port of the root hub of an EHCI host controller.

The failure happens while the port is being enabled (function ehci_root_enable). The reset of the port is successfully completed (bit 8 of the PORTSC register of the port is set to 0), but the port is not enabled (bit 2 of the PORTSC register of the port is set 0 and bit 0 of PORTSC register of the port is set to 1).

Any help will be wellcomed.

Thanks in advance and excuse my English.

Eugenio
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USB device not enumerated by iPXE USB stack - eugenio - 2016-09-14 13:40



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