New Implementation Proposal for Zephyr SD Protocol Stack
summary
Proposal claims a generic SD protocol stack plus a host controller API reduces vendor code and yields consistent features instead of vendor-specific implementations. Uses Zephyr disk driver API, a request/set_io/get_host_props surface, and supports DMA, interrupts and UHS where hardware allows. Example numbers: existing vendor driver was 3,000 source lines, new host controller shim is 900 source lines, and an LPC host limits speed to 50 MHz max. Stack is upstreamed for SDMMC now, SDIO planned.
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chapters (8)
- 0:00Introduction
- 1:04SD Support
- 7:13Host Controller API
- 10:34Implementation Tips
- 14:01LPC SDIF
- 17:29Demo
- 18:04Future Work
- 20:18Summary
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