[haiku-bugs] Re: [Haiku] #5551: ATI/AMD SB700/SB800/SBx00 USB Interrupt Issues

#5551: ATI/AMD SB700/SB800/SBx00 USB Interrupt Issues
--------------------------+------------------------------------------------
   Reporter:  MrSunshine  |      Owner:  mmlr
       Type:  bug         |     Status:  new
   Priority:  normal      |  Milestone:  R1
  Component:              |    Version:  R1/Development
  Drivers/USB             |   Keywords:  ati_via_dropped_interrupts
 Resolution:              |   Blocking:  6026, 6191, 6222, 6223, 6527, 7477
 Blocked By:              |   Platform:  All
Has a Patch:  1           |
--------------------------+------------------------------------------------

Comment (by stargatefan):

 mmlr "micheal" right ?

  do you think it is possiable that during the interupt reset that the usb
 controller goes into the low power off hibernate state ? I see if in the
 eratta on page 26 of this document. Apprently there are a number of power
 states, they are not available in the ohci and according to the block
 diagrams the ehci must recieve a power state message to begin working.

    Is the IO-APIC implmentation dispatching a power state message to wake
 the controller up after the reset ?

   pages 24-27 of the attached pdf on the 810-850 chipsets. I have a
 suspicion that this applys to most of the AMD 600-800 chipsets and it
 could explain why the interupt request is being ignored.

-- 
Ticket URL: <http://dev.haiku-os.org/ticket/5551#comment:46>
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