I was trapped in the situation for one week. When I plug my sd card in bb-ai, “mmc0: error -110 whilst initialising SD card” log out. When I am trying to boot debian from my sd card, “mmc0: error -110 whilst initialising SD card” log out.
Finally, I found out that the key of the problem is the device tree(.dtb). I didn’t study very deep into the .dts files provided by official website, because there is too many files.
So, I converted the am5729-beagleboneai.dtb to xx.dts using “dtc”. Then, I found out mmc1 node (mmc@4809c000), and modify some places as follows:
-
compatible = “ti,dra7-sdhci”; >>>>> compatible = “ti,dra7-sdhci”, “ti,omap4-hsmmc”;
-
add: vmmc_aux-supply = <0xd0>; (same node with vqmmc-supply)
-
max-frequency = <0xb71b000>; >>>>> max-frequency = <0x16e3600>; (to lower the frequency of mmc)
Save and exit, then convert the .dts file to am5729-beagleboneai.dtb, replace the old one.
Then, I booted debian from my SD card successfully! And, when I booted debian form emmc(modify the .dts inside as listed above), there was no error log “mmc0: error -110 whilst initialising SD card” when plug in sd card, and I can see my sd card using “lsblk”, and also can mount it successfully.
However, some error log still there as follows when poweron. But now, I can do some work at least.
U-Boot 2019.07-rc4-00001-g607b5b738b (Jul 06 2019 - 21:01:15 -0500), Build: jenkins-github_Bootloader-Builder-127
CPU : DRA752-GP ES2.0
Model: BeagleBoard.org BeagleBone AI
Board: BeagleBone AI REV A
DRAM: 1 GiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
CTRL_CORE_PAD_I2C1_SDA: 0x00060000
CTRL_CORE_PAD_I2C1_SCL: 0x00060000
CTRL_CORE_PAD_GPMC_A0: 0x00060007
CTRL_CORE_PAD_GPMC_A1: 0x00060007
CTRL_CORE_PAD_VIN2A_D4: 0x0005000f
CTRL_CORE_PAD_VIN2A_D5: 0x0005000f
CM_L4PER_GPIO7_CLKCTRL: 0x00000001
CM_L4PER_I2C1_CLKCTRL: 0x00000002
CM_L4PER_I2C4_CLKCTRL: 0x00000002
CM_L4PER_L4_PER1_CLKCTRL 0x00000001
PM_L4PER_I2C1_WKDEP 0x0000b000
RM_L4PER_I2C1_CONTEXT 0x00000002
PM_L4PER_I2C4_WKDEP 0x0000b000
RM_L4PER_I2C4_CONTEXT 0x00000001
BeagleBone: cape eeprom: i2c_probe: 0x54
Checking (ret 1 bus works) I2C1 bus. ret 1
Checking (ret 1 bus works) I2C4 bus. ret 1
BeagleBone: cape eeprom: i2c_probe: 0x55
Checking (ret 1 bus works) I2C1 bus. ret 1
Checking (ret 1 bus works) I2C4 bus. ret 1
BeagleBone: cape eeprom: i2c_probe: 0x56
Checking (ret 1 bus works) I2C1 bus. ret 1
Checking (ret 1 bus works) I2C4 bus. ret 1
BeagleBone: cape eeprom: i2c_probe: 0x57
Checking (ret 1 bus works) I2C1 bus. ret 1
Checking (ret 1 bus works) I2C4 bus. ret 1
Net:
Warning: ethernet@48484000 using MAC address from ROM
eth0: ethernet@48484000
Press SPACE to abort autoboot in 1 seconds
usb_boot is currently disabled
scsi_boot is currently disabled
switch to partitions #0, OK
mmc0 is current device
Partition Map for MMC device 0 – Partition Type: DOS
Part Start Sector Num Sectors UUID Type
1 8192 7364608 f7146e7c-01 83 Boot
Scanning mmc device 0
Checking for: /uEnv.txt …
Checking for: /boot/uEnv.txt …
657 bytes read in 2 ms (320.3 KiB/s)
Loaded environment from /boot/uEnv.txt
Checking if uname_r is set in /boot/uEnv.txt …
debug: [uname_r=4.14.108-ti-r113] …
loading /boot/vmlinuz-4.14.108-ti-r113 …
9929216 bytes read in 864 ms (11 MiB/s)
loading /boot/dtbs/4.14.108-ti-r113/am5729-beagleboneai.dtb …
103182 bytes read in 11 ms (8.9 MiB/s)
uboot_overlays: add [enable_uboot_overlays=1] to /boot/uEnv.txt to enable…
loading /boot/initrd.img-4.14.108-ti-r113 …
4642997 bytes read in 406 ms (10.9 MiB/s)
debug: [console=ttyS0,115200n8 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 rng_core.default_quality=100 quiet] …
debug: [bootz 0x82000000 0x88080000:46d8b5 0x88000000] …
Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Ramdisk to 8fb92000, end 8ffff8b5 … OK
Loading Device Tree to 8fb75000, end 8fb9130d … OK
Starting kernel …
[ 0.002420] /cpus/cpu@0 missing clock-frequency property
[ 0.002444] /cpus/cpu@1 missing clock-frequency property
[ 0.560313] omap-mailbox 4a0f4000.mailbox: no available mbox devices found
[ 0.560383] omap-mailbox 4883a000.mailbox: no available mbox devices found
[ 0.560448] omap-mailbox 4883c000.mailbox: no available mbox devices found
[ 0.560511] omap-mailbox 4883e000.mailbox: no available mbox devices found
[ 0.561155] omap-mailbox 48844000.mailbox: no available mbox devices found
[ 0.561224] omap-mailbox 48846000.mailbox: no available mbox devices found
[ 0.561288] omap-mailbox 4885e000.mailbox: no available mbox devices found
[ 0.561353] omap-mailbox 48860000.mailbox: no available mbox devices found
[ 0.561416] omap-mailbox 48862000.mailbox: no available mbox devices found
[ 0.561478] omap-mailbox 48864000.mailbox: no available mbox devices found
[ 0.561540] omap-mailbox 48802000.mailbox: no available mbox devices found
[ 1.008948] tpd12s015 encoder@0: failed to find video source
[ 1.014950] connector-hdmi connector@0: failed to find video source
[ 1.137172] dwc3 488d0000.usb: failed to initialize core
[ 1.158946] sdhci-omap 4809c000.mmc: failed to set system capabilities
[ 1.166177] sdhci-omap 480b4000.mmc: failed to set system capabilities
[ 1.189399] omap_voltage_late_init: Voltage driver support not added
[ 25.420732] cpu cpu0: _get_optimal_vdd_voltage: Failed optimized voltage match for 860000
Debian GNU/Linux 9 beaglebone ttyS0
BeagleBoard.org Debian Image 2019-08-03
Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian
default username:password is [debian:temppwd]
beaglebone login: