WM8904: Can't reset the WM8904 unless we also reinitiailize all registers.  Try to get a saner timeout based on sample rate, bits-per-sample, and buffer size.

Audio: Change how the end of the audio stream is detected by the leaf audio component.  This used by be done by looking for the first partial buffer.  That does not work with the in-place sub-sampling performed by the PCM decoder:  That always reduces the size of the buffer so that all buffers only partially filled by the time they get to the leaf.  Now, a flag is set in the audio buffer flags set to indicate the final buffer in the stream.

sem_wait: Use set_errno() and get_errno().  Direce access inside the OS may not be supported in the future.

dd support for a USB keyboard as the NxConsole and text widget input.  Not fully functional as of this initial check-in.  Basic functionality is there, but there are conditions were the keyboard gets lost.

SAMA5 HSMCI: e-enable TX DMA and verify that DMA writes to the SD card are functional.  They are so now TX DMA is re-enabled in the driver.  This might affect the SAMA5D3 platforms where the TX DMA problem was found.  The SAMA4D3 and 4 use the same HSMCI driver.  Much has change since then and it is not surprising that DMA is now functional.  However, the has not be re-verified on the SAMA5D3 which has a different DMA controller.

Auto-mounter:  Fix state setting.  Not harmful other than it can cause a debug assertion to fire if you manually unmount the media before removing it which is, of course, what you are supposed to do.

SAMA5D HSMCI: Fix a problem on card insertion/removal callback handling.  Interrupts were being disable so that the callbacks occurred with interrupts disabled.  This resulted in loss of some interrupts and some not-so-good behaviors.  The solution is to perform all callbacks on the work thread unconditionally (2014-7-29).

SAMA5D HSMCI: Add method to do RX transfer without DMA.  The 8-byte SCR transfer was failing silently with the DMA transfer, leaving the SD card in single bit mode

The SAMA5D4-EK NSH and NxWM configurations now have the auto-mounter configured to automatically mount the FAT file system on HSMCI0 at /mnt/sdcard