Commit graph

3 commits

Author SHA1 Message Date
James Sarrett b772024699 send bus initialization bits before MMC_GO_IDLE_STATE command to initialize card after poweron 2017-06-22 11:08:47 +08:00
Ivan Grokhotkov 49848eaed5 sdmmc: handle card removal when CD is not used
When SD card is removed during transaction, SDMMC peripheral can report
a range of errors, such as timeouts, CRC errors, start/end bit errors.
Under normal conditions (card is inserted), SDMMC peripheral also generates
command done or data done interrupts. When the card is removed, such
interrupts may not be always generated.

This change fixes handling of timeout interrupts and SBE interrupts.
It also adds a one second timeout into the event processing loop. This
timeout allows applications to recover in cases when the SDMMC peripheral
doesn’t generate command/data done event on card removal.
2017-04-19 12:50:51 +08:00
Ivan Grokhotkov edd924f273 sdmmc: add peripheral driver and protocol layer 2017-01-09 04:51:24 +08:00