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TODO revision 1.29 
      1   1.1  augustss Some things that need to be done in no particular order:
      2   1.7  augustss --------------------------------------------------------
      3   1.1  augustss 
      4  1.11  augustss Add lots of bus_dmamap_sync().
      5  1.11  augustss 
      6   1.2  augustss Do bandwidth accounting.
      7   1.2  augustss 
      8   1.2  augustss Use lock manager locks.
      9   1.2  augustss 
     10   1.5  augustss Use the pool allocator for TDs et al.
     11   1.5  augustss 
     12   1.6  augustss Throw out more USBDI gunk.
     13   1.7  augustss 
     14  1.13  augustss Make hub driver notice transition between self and bus powered state.
     15  1.21  augustss Some hubs change the number of available ports on this transition. :(
     16   1.7  augustss Handle overcurrent conditions.
     17  1.13  augustss 
     18  1.13  augustss Make it possible to open any device in a "generic" way, i.e., like ugen.
     19  1.13  augustss 
     20  1.13  augustss Rewrite mouse and keyboard driver to handle devices which use the
     21  1.13  augustss report ID.  One way would be to attach ums and ukbd to uhid.
     22  1.13  augustss 
     23  1.13  augustss Rotate the QHs for bulk transport to get fairer scheduling.
     24  1.13  augustss 
     25  1.13  augustss Change HC drivers to queue multiple request for an endpoint
     26  1.13  augustss to get better performance.
     27  1.13  augustss 
     28  1.14  augustss Add isoc to OHCI driver.
     29  1.14  augustss 
     30  1.25  augustss Do memory deallocation when HC driver is detached.
     31  1.20  augustss 
     32  1.14  augustss uaudio problems:
     33  1.14  augustss 	mixer names are awful, use some heuristics.
     34  1.14  augustss 	implement selector units
     35  1.14  augustss 	implement input
     36  1.14  augustss 	test with more devices
     37  1.15  augustss 
     38  1.17  augustss Stylistic changes:
     39  1.17  augustss 	use usb_ and usbd_ consistently
     40  1.17  augustss 	rearrange the contents and names of some files (Nick)
     41  1.17  augustss 
     42  1.10  augustss Document device driver API.
     43  1.10  augustss 
     44  1.10  augustss Document HC driver API.
     45  1.22  augustss 
     46  1.28  augustss Handle CLEAR_ENDPOINT_STALL centrally.
     47  1.25  augustss 
     48  1.25  augustss Use splsoftusb() or a thread to deliver callbacks.
     49  1.25  augustss 
     50  1.25  augustss Add threads to the Ethernet drivers.
     51  1.29  augustss 
     52  1.29  augustss Change what's done at watchdog timeout inb if_{a,c,k}ue.c; what we have
     53  1.29  augustss now doesn't work because it's done in an interrupt context.
     54  1.29  augustss 
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