Lephe af5c16a3d3 usb: massively improve writing logic ... * Move logic around tracking transfers to asyncio.c. * Add a "short buffer" holding 0-3 bytes between writes, so that the driver performs only 4-byte writes in the FIFO and a short write in the commit, if needed. - This is partially due to me thinking at some point that degrading writing size was impossible, but it might actually be possible by writing to FIFO/FIFO+2 or FIFO/FIFO+1/FIFO+2/FIFO+3. - In any case I think this new approach wins on performance. * Get rid of unit_size since we now always use 4 bytes. * Add a waiting function which is used in usb_close() (and once tested should be used in world switches too). * Eliminate some of the special cases for the DCP, though not all (in particular I can't get the commit to rely on the BEMP interrupt yet, nor can I properly clear PID to NAK when unbinding).		2023-02-09 23:00:44 +01:00
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gint	usb: massively improve writing logic	2023-02-09 23:00:44 +01:00