Table of Contents
U-Boot
reachable via debug-uart
*** U-Boot Boot Menu ***
1. System Load Linux to SDRAM via TFTP.
2. System Load Linux Kernel then write to Flash via TFTP.
3. Boot Linux from SD.
4. System Load Boot Loader then write to Flash via TFTP.
5. System Load Linux Kernel then write to Flash via Serial.
6. System Load Boot Loader then write to Flash via Serial.
7. Boot system code via Flash.
U-Boot console <<<<<<<<
Press UP/DOWN to move, ENTER to select
update Uboot
The emmc-command is integrated in uboot since September 29th 2017 (version: “U-Boot 2014.04-rc1 (Oct 16 2017 - 19:33:23)”)
if you want to create new SD-Card (Image) you have to write partitiontable and some additional headers, see here for more
compile U-Boot from official GitHub my GitHub
official way to install is described on Github using “bpi-update -c bpi-r2.conf”
sudo dd if=/dev/sdx of=bpi-r2-first10M.img bs=1M count=10 #Backup of first 10MB sudo dd if=BPI-R2-720P-2k.img of=/dev/sdx bs=1k seek=2 count=1022 #unzipped img! sudo dd of=/dev/sdx if=bpi-r2-first10M.img bs=1M count=10 #restore first 10MB (on problems)
actual compiled uboot can be found on my gDrive
alternative: flash only uboot (after option 2 in build.sh, don't forget backup):
sudo dd of=/dev/sdb if=u-boot-mt/u-boot.bin bs=1k seek=320
there are also patches for 2018-11 uboot-patchwork, which i have applied in a uboot-fork. more details here in r2-forum
uboot 2018-11
Mediatek have released patches for BPI-R2…these i have imported to a uboot-fork and configured (build.sh, config, default-Environment, …): https://github.com/frank-w/u-boot
kernel from SD-Card can be loaded (emmc should also work), ethernet-driver is also built in
uboot-environment is saved (saveenv-command) to boot-device
if you want to load default environment instead of the saved one:
env default -a printenv
List of commands
BPI-IoT> help
back to menu with command “bootmenu”
change partition-configuration of EMMC
BPI-IoT> emmc --help emmc - eMMC sub system Usage: emmc read part addr blk# cnt emmc write part addr blk# cnt emmc ecsd - Dump ext csd emmc pconf val - Set Part Config val
=========================================================== BPI-IoT> emmc pconf 0x48 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< change partition config BPI-IoT> emmc ecsd <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< verify ===========================================================
in newer uboot (2018):
http://forum.banana-pi.org/t/add-latest-u-boot-support-for-bpi-r2-bpi-r64-not-yet/6938/26
mmc partconf 0 1 1 0
System-start out of Console
BPI-IoT> printenv ... boot10=mmc init; run boot_normal; bootm ... bootmenu_2=3. Boot Linux from SD.=run boot10 ...
run boot10
set Kernel-filename
in BPI-BOOT/bananapi/bpi-r2/linux/uEnv.txt change the param kernel:
#kernel=uImage #kernel=uImage_4.14.33 kernel=uImage_4.9.92
with this you can have multiple kernel-files on disk to fast switch back to older one (if you have different filenames). For multiboot code of uboot has to be changed… The uEnv.txt is not loaded before displaying the boot-menu, it is loaded after “Boot Linux from SD” is selected.
manually load uEnv.txt
uEnv.txt will be loaded after “Boot from SD” is selected. here the manual way from console
#Boot from emmc：
enter to uboot-console；
execute “mmc init 0”
execute “setenv partition 0:1”
execute “run loadbootenv”
execute “env import -t ${scriptaddr} ${filesize} ”
#Boot from SD:
enter to uboot-console；
execute “mmc init 1”
execute “setenv partition 1:1”
execute “run loadbootenv”
execute “env import -t ${scriptaddr} ${filesize} ”
Source: http://forum.banana-pi.org/t/how-to-extend-the-uboot-menu/5415/7
because of “loadenv” does not exist in upstream u-boot, these commands/variable-definitions are needed to get same result (load uEnv.txt + kernel):
setenv scriptaddr 0x83000000
setenv bpi bananapi
setenv board bpi-r2
setenv service linux
setenv device mmc
setenv partition 1:1
setenv bootenv uEnv.txt
setenv loadbootenv fatload ${device} ${partition} ${scriptaddr} ${bpi}/${board}/${service}/${bootenv}
run loadbootenv
#not define importenv before run loadbootenv (or at least with escaped $ on filesize-var)!
setenv importenv env import -t ${scriptaddr} \${filesize}
run importenv
printenv
setenv newboot "fatload ${device} ${partition} ${loadaddr} ${bpi}/${board}/${service}/\${kernel}; bootm"
run newboot
#check for boot-device (emmc/sd)
setenv checksd fatinfo ${device} 1:1
setenv selectmmc "if run checksd; then echo Boot from SD ; setenv partition 1:1;else echo Boot from eMMC; setenv partition 0:1 ; fi;"
run selectmmc
helpful commands
MMC
U-Boot> mmc list mmc@11230000: 0 (eMMC) mmc@11240000: 1 (SD) #set mmc-device U-Boot> mmc dev 1 #read current device U-Boot> mmc dev switch to partitions #0, OK mmc1 is current device U-Boot> mmcinfo Device: mmc@11240000 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 #partitionconfig #mmc partconf dev [boot_ack boot_partition partition_access] # - Show or change the bits of the PARTITION_CONFIG field of the specified device #example for mode 0x48 (needed for emmc-boot on bpi-r2) U-Boot> mmc partconf 0 EXT_CSD[179], PARTITION_CONFIG: BOOT_ACK: 0x1 BOOT_PARTITION_ENABLE: 0x1 PARTITION_ACCESS: 0x0 #set via U-Boot> mmc partconf 0 1 1 0
directory-listing
ls mmc 1:1 bananapi/bpi-r2/linux
ask for kernel
lskernel=ls ${device} ${partition} ${bpi}/${board}/${service};
askkernel=askenv kernelinput "enter uImage-name:";
boot0=run lskernel;run askkernel;if printenv kernelinput ;then setenv kernel ${kernelinput}; run newboot; fi
bootmenu_0=1. Enter kernel-name to boot from SD/EMMC.=run boot0
netboot
PCIe
uboot before 2020-10 (my version) has bug which causes hang on pci enum if there is no card inserted into slot
BPI-R2> pci enum
BPI-R2> pci 0
Scanning PCI devices on bus 0
BusDevFun VendorId DeviceId Device Class Sub-Class
_____________________________________________________________
00.00.00 0x14c3 0x0801 Bridge device 0x04
00.01.00 0x14c3 0x0801 Bridge device 0x04
BPI-R2> pci 1
Scanning PCI devices on bus 1
BusDevFun VendorId DeviceId Device Class Sub-Class
_____________________________________________________________
01.00.00 0x14c3 0x7612 Network controller 0x80
BPI-R2> pci 2
Scanning PCI devices on bus 2
BusDevFun VendorId DeviceId Device Class Sub-Class
_____________________________________________________________
02.00.00 0x1b21 0x0611 Mass storage controller 0x01
BPI-R2> scsi scan
scanning bus for devices...
SATA link 0 timeout.
Target spinup took 0 ms.
AHCI 0001.0200 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
flags: 64bit ncq stag led clo pmp pio slum part ccc sxs
Device 0: (1:0) Vendor: ATA Prod.: ST750LM022 HN-M7 Rev: 2AR1
Type: Hard Disk
Capacity: 715404.8 MB = 698.6 GB (1465149168 x 512)
BPI-R2>
SATA
see pcie (pci enum + scsi scan) and then access hdd via
ls scsi 0:1
USB
BPI-R2> usb start
starting USB...
Bus usb@1a1c0000: hcd: 0x1a1c0000, ippc: 0x1a1c4700
u2p:1, u3p:1
Register 200010f NbrPorts 2
Starting the controller
USB XHCI 0.96
Bus usb@1a240000: hcd: 0x1a240000, ippc: 0x1a244700
u2p:1, u3p:1
Register 200010f NbrPorts 2
Starting the controller
USB XHCI 0.96
scanning bus usb@1a1c0000 for devices... 1 USB Device(s) found
scanning bus usb@1a240000 for devices... 2 USB Device(s) found
scanning usb for storage devices... 1 Storage Device(s) found
BPI-R2> usb tree
USB device tree:
1 Hub (5 Gb/s, 0mA)
U-Boot XHCI Host Controller
1 Hub (5 Gb/s, 0mA)
| U-Boot XHCI Host Controller
|
+-2 Mass Storage (480 Mb/s, 200mA)
USB Flash Disk 906B030002F4
BPI-R2> ls usb 0:1
efi/
4767728 kernel
1 file(s), 1 dir(s)