Hi Johan,
Johan Hovold 於 2016/11/24 下午 11:04 寫道:
On Mon, Nov 14, 2016 at 01:37:59PM +0800, Ji-Ze Hong (Peter Hong) wrote:
This driver is for Fintek F81532/F81534 USB to Serial Ports IC.
+ }
+
+ if (size_bulk_out != F81534_WRITE_BUFFER_SIZE ||
+ size_bulk_in != F81534_MAX_RECEIVE_BLOCK_SIZE) {
+ dev_err(dev, "%s: endpoints packet size not matched\n",
+ __func__);
Similarly: "unsupported endpoint max packet size\n".
But just to be clear: You do want to bail out if connected at full
speed? You could also ask usb-serial core to allocate large enough
buffers (e.g. by setting the bulk_out_size driver field) and the host
controller will handle partitioning.
Yes, this product cannot run on USB full-speed currently due to the
bulk-out endpoint design. It need use 512 bytes packet size to transmit
4 ports TX data, but USB Full-speed only provide 64 byte. The F81534
will treat the all bulk-out data as port 0 although the host will spilt
512byte to 8 x 64bytes packets.
--
With Best Regards,
Peter Hong
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
