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Elias Devoldere eldevoldere at gmail.comHello,
I was playing with LTE modem R11e-4G based on ALT3800-B0 chipset.
I was amazed when I got a U-Boot console after command at+cfun=1,1 and
sending several random characters. I assume it's not news for seasoned
wolves who hunt here.
As a modem rookie I did not find a relevant link to this topic during
Google's fast search.
My questions.
Is this behavior generally known?
Can this be a one-piece property (I have only one piece)?
Could it be useful for interesting research?
Is there anyone who cares about it?
I will try to extract parts of the memory using U-boot.
Below you find pieces of the listing.
Best,
Elias
# help
help
? - alias for 'help'
base - print or set address offset
bdinfo - print Board Info structure
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootelf - Boot from an ELF image in memory
bootfw - Load and boot FW from ELF image in memory
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
bootvx - Boot vxWorks from an ELF image
chpart - change active partition
clocks - print clock configuration
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
create_bdinfo- Create Board info
dhcp - boot image via network using DHCP/TFTP protocol
dip - show the Boot mode configuration options
echo - echo args to console
editenv - edit environment variable
env - environment handling commands
exit - exit script
false - do nothing, unsuccessfully
fdt - flattened device tree utility commands
fsinfo - print information about filesystems
fsload - load binary file from a filesystem image
fsloadbsp- load bsp binary files from a filesystem image
fstest - testing filesystems
go - start application at address '[*]addr' (possibly be indirect
address)
gpio - input/set/clear/toggle gpio pins
help - print command description/usage
i2c - I2C sub-system
iminfo - print header information for application image
imxtract- extract a part of a multi-image
initfw - Init FW PLLs
itest - return true/false on integer compare
kermit_stat- Show statistics of the last Kermit session
kermit_stat_print- print kermit statistics at the end of session
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
loopw - infinite write loop on address range
ls - list files in a directory (default /)
md - memory display
md5sum - compute MD5 message digest
mdc - memory display cyclic
mii - MII utility commands
mm - memory modify (auto-incrementing address)
mtdparts- define flash/nand partitions
mtest - simple RAM read/write test
mw - memory write (fill)
mwc - memory write cyclic
nand - NAND sub-system
nandotp - NAND OTP sub-system
nboot - boot from NAND device
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
rarpboot- boot image via network using RARP/TFTP protocol
reginfo - print register information
reset - Perform RESET of the CPU
reset_cause- print reset cause
run - run commands in an environment variable
saveenv - save environment variables to persistent storage
setenv - set environment variables
show_bdinfo- Show board info
showvar - print local hushshell variables
sleep - delay execution for some time
source - run script from memory
test - minimal test like /bin/sh
tftpboot- boot image via network using TFTP protocol
true - do nothing, successfully
unlzo - decopress a lzo memory region
unzip - unzip a memory region
version - print monitor, compiler and linker version
U-Boot 2012.10 (Aug 09 2018 - 10:17:38)
mips-fourgee3100-linux-uclibc-gcc (0.1) 4.5.3
GNU ld (GNU Binutils) 2.21
#
baudrate=115200
boot_default=run flash_boot
boot_nand_mtd=run nand_choose_rootfs; run flash_set_bootargs; nboot
kernel${boot_number}; nand read ${dtb_addr} dtb${boot_number} ${dtb_size};
bootm ${loadaddr} - ${dtb_addr}
boot_nand_ramfs=run ram_set_bootargs; nboot kernel${boot_number}; bootm
boot_number=2
boot_option=boot_default
boot_tftp_ramfs=run ram_set_bootargs; ${tftpbootcmd} vmlinux.uboot; bootm
${loadaddr}
bootcmd=if itest.b 0 == *a00d001b; then run ${boot_option}; else echo
'GUESS MODE - NO BOOT ALLOWED !!!'; fi
bootdelay=6
bootm_low=0x82100000
bootm_size=0x6000000
cdc_connect_timeout=10
consoledev=ttyS0
dtb_addr=0x84000000
dtb_file=alt3802.dtb
dtb_size=0x4000
env_check=if test ${env_saved} = 0; then setenv env_saved 1; saveenv; fi
env_configured_size=0x4000
env_saved=1
erase_env_nand=nand erase.part env; nand erase.part backup_env
eth_phy_mode=rmii
ethact=usb_ether
ethaddr=00:E0:0C:00:11:A0
fastboot=setenv loadaddr ${fastboot_loadaddr};run loadfw; if test $? -eq 0;
then bootfw ${unziped_fwaddr} 1; fi; run loadotp; if run loadbsp;then run
process_fw; fi;
fastboot_loadaddr=0x82800000
fdt_high=0x83000000
fdtdbg=no
flash_boot=run nand_choose_rootfs; run flash_set_bootargs; run fastboot;
nboot kernel${boot_number}; nand read ${dtb_addr} dtb${boot_number}
${dtb_size}; bootm ${loadaddr} - ${dtb_addr}
flash_set_bootargs=setenv bootargs $ip root=${root} rw rootfstype=jffs2
console=$consoledev,$kernel_baudrate $othbootargs $kernellog
gatewayip=0.0.0.0
hostname=alt3800
initrd_high=0x83000000
ipaddr=10.0.0.1
kernel_baudrate=115200
kernel_file=uImage
kernellog=quiet
load_fw=run load_phy_fw; run load_lte_fw
load_lte_fw=${tftpbootcmd} $lte_fw; setenv fw_type LTE; bootelf
load_phy_fw=${tftpbootcmd} $phy_fw; setenv fw_type PHY; bootelf
loadaddr=0x80100000
loadbsp=chpart nvm; fsloadbsp 1 ${ramFilesShAddr} band_list bandbp
file_list bspfilesbp
loadfw= nand read.jffs2 ${loadaddr} modem_fw${boot_number}; unlzo
${loadaddr} ${unziped_fwaddr};
loadotp=nandotp read ${ramOtpShAddr} spl 20
lte_fw=PS100_RealPHY.elf
mtdparts=mtdparts=alt3800_nfc:512k(spl),768k(uboot1),768k(uboot2),256k(env),256k(backup_env),3m(nvm),3m(kernel1),256k(dtb1),37m(rootfs1),3m(kernel2),256k(dtb2),37m(rootfs2),4m(modem_fw1),4m(modem_fw2),-(tstorage)
nand128_mtdparts=mtdparts=alt3800_nfc:512k(spl),768k(uboot1),768k(uboot2),256k(env),256k(backup_env),3m(nvm),3m(kernel1),256k(dtb1),37m(rootfs1),3m(kernel2),256k(dtb2),37m(rootfs2),4m(modem_fw1),4m(modem_fw2),-(tstorage)
nand128_scheme2_mtdparts=mtdparts=alt3800_nfc:512k(spl),768k(uboot1),768k(uboot2),256k(env),256k(backup_env),3m(nvm),4m(kernel1),256k(dtb1),53m(rootfs1),4m(kernel2),256k(dtb2),53m(rootfs2),4m(modem_fw1),4m(modem_fw2)
nand256_mtdparts=mtdparts=alt3800_nfc:512k(spl),768k(uboot1),768k(uboot2),256k(env),256k(backup_env),3m(nvm),4m(kernel1),256k(dtb1),40m(rootfs1),4m(kernel2),256k(dtb2),40m(rootfs2),4m(modem_fw1),4m(modem_fw2),10m(ua),-(tstorage)
nand_choose_rootfs=if test 1 = ${boot_number}; then setenv root
/dev/mtdblock8;else setenv root /dev/mtdblock11; fi
nand_erasesize=20000
nand_oobsize=40
nand_uboot_file=u-boot.bin
nand_uboot_spl_file=u-boot-spl.bin.alt3800
nand_writesize=800
nc=run nchelp; setenv stdin nc;setenv stdout nc;setenv stderr nc
nchelp=echo On the host side run the script: ./netconsole $ipaddr $ncinport
ncinport=6665
ncip=10.0.0.10
ncmux=run nchelp; setenv stdout ${stdout},nc; setenv stdin ${stdin},nc;
setenv stderr ${stderr},nc
ncoutport=6665
netdev=eth0
netmask=255.255.0.0
nvm_file=nvm.jffs2.img
phy_dbgstreamer=0
phy_fw=Lte.out
phy_sniffer=0
preboot=run env_check; if test -n $prebootcmd; then echo; echo Running
pre-boot command; run prebootcmd;fi;
process_fw=initfw; bootfw ${unziped_fwaddr} 0
ramFilesShAddr=0xA030004c
ramOtpShAddr=0xA0300000
ram_set_bootargs=setenv bootargs $ip root=/dev/ram rw
console=$consoledev,$kernel_baudrate $othbootargs $kernellog
rootfs_file=rootfs.jffs2.img
ser=setenv stdin serial;setenv stdout serial;setenv stderr serial
serverip=10.0.0.10
set_ip=setenv ip
ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:off
stderr=serial,usbtty
stdin=serial,usbtty
stdout=serial,usbtty
testdramaddress=no
testdramcache=yes
testdramcount=1
testdramdata=no
testdramsize=0x08000000
testdramstart=0x80100000
testdramwalk=no
tftpbootcmd=tftpboot
toggle_boot_number=if test 1 = ${boot_number}; then set boot_number 2; else
set boot_number 1; fi; saveenv
unziped_fwaddr=0x83000000
update_all=run update_all_nand
update_all_nand=run update_kernel_nand update_dtb_nand update_rootfs_nand
update_dtb=run update_dtb_nand
update_dtb_nand=if ${tftpbootcmd} ${dtb_file}; then nand erase.part
dtb${boot_number}; nand write ${loadaddr} dtb${boot_number} ${filesize}; fi
update_kernel=run update_kernel_nand
update_kernel_nand=if ${tftpbootcmd} ${kernel_file}; then nand erase.part
kernel${boot_number}; nand write ${loadaddr} kernel${boot_number}
${filesize}; fi
update_linux=${tftpbootcmd} uImage
update_multi_img=run update_multi_img_nand
update_multi_img_nand=setenv kernel_file vmlinux.uboot; run
update_kernel_nand
update_nvm=run update_nvm_nand
update_nvm_nand=if ${tftpbootcmd} ${nvm_file}; then nand erase.part nvm;
nand write ${loadaddr} nvm ${filesize}; fi
update_ramdisk=${tftpbootcmd} $ramdiskaddr ramdisk.gz.uboot
update_rootfs=run update_rootfs_nand
update_rootfs_nand=if ${tftpbootcmd} ${rootfs_file}; then nand erase.part
rootfs${boot_number}; nand write ${loadaddr} rootfs${boot_number}
${filesize}; fi
update_uboot=run update_uboot_nand
update_uboot_nand=run update_uboot_nand_spl update_uboot_nand_non_spl
erase_env_nand
update_uboot_nand_non_spl=if ${tftpbootcmd} ${nand_uboot_file}; then nand
erase.part uboot1; nand write ${loadaddr} uboot1 ${filesize}; nand
erase.part uboot2; nand write ${loadaddr} uboot2 ${filesize}; fi
update_uboot_nand_spl=if ${tftpbootcmd} ${nand_uboot_spl_file}; then nand
erase.part spl; nand write ${loadaddr} spl ${filesize}; fi
usbphymode=0
usbtty=cdc_acm
ver=U-Boot 2012.10 (Aug 09 2018 - 10:17:38)
Environment size: 6184/16379 bytes
mtdparts
device nand0 <alt3800_nfc>, # parts = 15
#: name size offset mask_flags
0: spl 0x00080000 0x00000000 0
1: uboot1 0x000c0000 0x00080000 0
2: uboot2 0x000c0000 0x00140000 0
3: env 0x00040000 0x00200000 0
4: backup_env 0x00040000 0x00240000 0
5: nvm 0x00300000 0x00280000 0
6: kernel1 0x00300000 0x00580000 0
7: dtb1 0x00040000 0x00880000 0
8: rootfs1 0x02500000 0x008c0000 0
9: kernel2 0x00300000 0x02dc0000 0
10: dtb2 0x00040000 0x030c0000 0
11: rootfs2 0x02500000 0x03100000 0
12: modem_fw1 0x00400000 0x05600000 0
13: modem_fw2 0x00400000 0x05a00000 0
14: tstorage 0x02200000 0x05e00000 0
active partition: nand0,0 - (spl) 0x00080000 @ 0x00000000
defaults:
mtdids : nand0=alt3800_nfc
mtdparts: uninitialized
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