[sound/oss i810] add MMIO DSP support
Enclosed is a patch for the i810_audio OSS driver to support using memory-mapped I/O for those chipsets that support it. o Added a family of macros -- I810_IOREADx() and I810_IOWRITEx() -- that key off the existing card->use_mmio flag to select between using readx/writex or inx/outx for I/O operations. o Converted existing inx/outx invocations to use I810_IOREADx/I810_IOWRITEx instead. o Changed GET_CIV(), GET_LVI, and CIV_TO_LVI() not only to use I810_IOREADx/I810_IOWRITEx but also to take "card" (i.e. struct i810_card) paramter. o Removed check for "Pure MMIO interfaces" in i810_probe() -- replaced w/ (relocated) check for no I/O resources available.
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