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   Alfred M. Szmidt (amszmidt@mastodon.social)'s status on Wednesday, 22-Jan-2025 09:36:59 JST Alfred M. Szmidt

   in reply to

   • Troed Sångberg

   @troed Yes.

   • Embed this notice
     Troed Sångberg (troed@ioc.exchange)'s status on Wednesday, 22-Jan-2025 09:37:00 JST Troed Sångberg

     in reply to

     So the TP-Link GPL tarball has, in a Linux 3.14 tree, what looks like something of a hybrid between a backported mmc driver and their own development. It's newer than the one in Linux 3.14 actual, but it contains strings and code I cannot find in any subsequent Linux driver either.

     Or I'm just completely missing something here that should be obvious. Why would they run a completely parallel development track - they're not exactly making their own silicon.

   • Embed this notice
     Troed Sångberg (troed@ioc.exchange)'s status on Wednesday, 22-Jan-2025 09:37:01 JST Troed Sångberg

     I'm currently (together with meshing) getting OpenWRT up and running on the TP-Link Deco M9+ devices. I'm on the v1 hardware, he's on v2.

     The v1 has an 8MB SPI-NOR plus a massive 4GB eMMC while the v2 has a single 128MB NAND.

     I'm having issues with the eMMC and this is a post looking for help from other hardware hackers.

     Thanks to the GPL I have TP-Link's own configuration, but it's for a much older version of OpenWRT. I'm currently stuck on;

     ```
     [ 20.216206] mmc0: cache flush error -84
     [ 20.254030] mmc0: tried to HW reset card, got error -84
     [ 20.254072] mmcblk0: recovery failed!
     ```
     (followed by I/O errors)

     The mmc is otherwise detected correctly, size and partitions etc.

     The TP-Link config has an;

     ```
     sd-ldo-gpios = <&tlmm 33 GPIO_ACTIVE_LOW>;
     ```

     ... and I can find the code using it in the old OpenWRT sdhci-msm.c with the comment "Toggle SD LDO GPIO on Init".

     But the current OpenWRT version doesn't seem to have such a code path.

     I have no idea if this is connected to my problem, but I'm running out of ideas here. The mmc works fine if I boot the TP-Link kernel of course.

     #OpenWRT #HardwareHacking