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  • First steps to Wifi released yielding increased SD performance

    From A Rawnsley - ROdevs@21:1/5 to All on Tue Feb 1 17:49:30 2022
    RISC OS Developments are pleased to announce the release of the first
    steps towards Wifi on RISC OS - updated SDIO drivers for most platforms
    making the on-board wifi chips visible/accessible.

    This project represents a sizable chunk of work, with updates and
    improvements to almost all active RISC OS platforms, enhancing the SDIO
    bus support and allowing improved access to multiple SDIO devices
    (including SD cards, eMMC and wifi / bluetooth chips).

    For those unfamiliar, most ARM SoCs (System-on-chip) have limited external connectivity for high speed devices, so wifi/bluetooth controllers are
    often connected via the SD card "SDIO" bus already present.

    This work opens that bus up, and provides driver developers with Linux and OpenBSD compatibility libraries, so that wifi drivers can be ported and
    can communicate with the chips via SDIO.

    In the process, various improvements have been made to SD support on RISC
    OS, often improving performance and reliability.

    Updated platforms include (but not limited to)...

    Raspberry Pi 0W, 3B/B+
    Secondary SDIO controller enabled allowing for separate SD and
    wifi bus, and DMA added to improve SD performance.

    Raspberry Pi 4
    Wifi/BT controller now visible via SDIO bus

    iMX6
    Wifi/BT controller now visible via SDIO, and noticable
    improvements to read performance of both SD slots.

    OMAP4 (Panda)
    Wifi controller now visible via SDIO

    Allwinner A64 (Pine)
    Wifi controller now visible via SDIO, eMMC now accessible,
    significant (x2) performance increase on SD, edge case stability
    improvements


    All these changes have been submitted for immediate open source release
    via the community Gitlab hosted by RISC OS Open Ltd. We note that some
    eager forum members have already begun experimenting with this new code!

    RISC OS Developments would like to thank those who helped make this
    project happen, both in terms of technical expertise/coding and financial support. We look forward to more such projects in the future.


    Best wishes,

    --
    Andrew Rawnsley
    RISC OS Developments Ltd


    _______________________________________________________________ a.m.conroy@argonet.co.uk, Moderator of comp.sys.acorn.announce.
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