Hi Stephen, > > I'm not sure how many of the below driver parameters are actually > > required. I think as least the three fifo size parameters, plus > > max_transfer_size and max_packet_count, are needed. > > I'm curious why any of them are required; why aren't the values embedded > in the HW registers correct?
As far as I've understood, there are some values (mostly PHY related) which cannot be detected from the HW registers. My interpretation is that the HW registers only store parameters used to synthesize the core, (i.e., I think they store if the core supports UTMI+ and/or ULPI PHYs, but not what kind of PHY is actually attached). Also IIUC, the FIFO size registers store the maximum values per FIFO and a global maximum, but it could be that the sum of the individual maximum FIFO sizes is more than the global maximum. This is something that could be fixed in the driver though, by somehow "fairly" (or otherwise intelligently) distributing the available FIFO memory over the various FIFOs. These are just the suspicions I have encountered while going through the code, perhaps Paul can confirm them. Gr. Matthijs -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
