eMMC not recognised by u-boot not available once booted

nickbreen · March 21, 2020

Armbianmonitor:

Re: the built-in 16GB emmc on a 14" pinebook (early model).

Applies to Armbian_20.02.1_Pinebook-a64_bionic_current_5.4.20.img and also to trunk build with dev kernel.

Prevents installation to emmc from SD, which worked from trunk@3b1418fb5b58f187c658a050c592f2c50fb2db04 in January. I haven't managed to find from which commit it started failing yet.

It is in some partial/invalid state in u-boot:

=> mmc list
mmc@1c0f000: 0 (SD)
mmc@1c10000: 2
mmc@1c11000: 1


=> mmc dev 0
switch to partitions #0, OK
mmc0 is current device
=> mmc info
Device: mmc@1c0f000
Manufacturer ID: 1b
OEM: 534d
Name: 00000 
Bus Speed: 50000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 2.0
High Capacity: Yes
Capacity: 7.6 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes


=> mmc dev 1
=> mmc info
Device: mmc@1c0f000
Manufacturer ID: 1b
OEM: 534d
Name: 00000 
Bus Speed: 50000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 2.0
High Capacity: Yes
Capacity: 7.6 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes


=> mmc dev 2 
Card did not respond to voltage select!

It is absent when booted, though has a token line in the log as "mmc1":

# dmesg | grep -i mmc
[    2.515757] sunxi-mmc 1c0f000.mmc: Got CD GPIO
[    2.541026] sunxi-mmc 1c0f000.mmc: initialized, max. request size: 16384 KB, uses new timings mode
[    2.542017] sunxi-mmc 1c10000.mmc: allocated mmc-pwrseq
[    2.560303] mmc0: error -110 whilst initialising SD card
[    2.565772] sunxi-mmc 1c10000.mmc: initialized, max. request size: 16384 KB, uses new timings mode
[    2.584669] mmc1: new high speed SDIO card at address 0001
[    2.592188] sunxi-mmc 1c11000.mmc: initialized, max. request size: 2048 KB, uses new timings mode
[    3.645870] mmc0: new high speed SDHC card at address 0001
[    3.646999] mmcblk0: mmc0:0001 00000 7.61 GiB
[    3.649985]  mmcblk0: p1 p2
[    4.019864] EXT4-fs (mmcblk0p1): mounted filesystem with writeback data mode. Opts: (null)
[    5.389779] EXT4-fs (mmcblk0p1): re-mounted. Opts: commit=600,errors=remount-ro