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AM3352: USB 4G modem issues

Part Number: AM3352


Hi, Bin Liu:

    We have ported to SDK8 under Full-Speed of the USB. Npw, we have three questions:

1、Under Full-Speed, the probability of babble appearing in the test is higher than that of high speed, and sometimes it is not driven to unload or load when it appears, it is babble every time. Is there something in the kernel of SDK8 that hasn't been modified?

2、It can be seen in one place that when the USB is reduced to Full-Speed, the 5th bit of the USB_O_POWER register of the USB CORE should be cleared and the same as the USB_PACKET_LENGTH should be changed to 64. Please help to confirm in the kernel of SDK8.

3、Am335x supports Low-Speed. How to reduce the USB to Low-Speed? We want to do a test under Low-Speed.