> Currently,the RX DMA MODE1 is setup only after a packet has sit in the RX fifo. > I just wonder if this way works?I was told that MODE1 should be setup before > receiving the first packet,or we have to setup MODE 0 to unload the > first packet and then > switch to MODE1 for the remaining packets. > Hi Cliff, This part is a little unclear in the spec, but it does indeed work. I'll send out a much smaller hack patch that demonstrates how mode1 RX works when programmed after a packet is already in the fifo - it can be used with g_zero or g_filestorage, and you can actually see the throughput improvement and reduced interrupt count. There is only one corner case that I could not take care of, that's why we cannot use this hack patch with all drivers (most of the code in the patch is already in the driver under the #ifdef USE_MODE_1 macro) The series Felipe posted is a complete rewrite of the MUSB code. When we're going to take that, I'd like a thorough review first. It takes care of the corner case I was hitting though, and seems to work with all gadgets on OMAPs at least. - Anand-- 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
