First round of changes in the revamped MMC driver.
Incremental improvements, but still can get any response from the SD card.
Fixed a problem with incorrectly setting the register for pin operation.
Got the MMC driver much closer to working in polling mode.
Further progress, but still not able to properly read from the SD card.
No idea if it is some DMA issue or if there is some other configuration
problem.
Finally got the DMA transfers working to some level.
Continued improvments to MMC driver.
Further enhancements to MMC driver.
Got interrupt handling working with the MMC driver.
Some additional cleanup of the MCC driver before merging.