Dear U-Boot Community,

I am working on a project involving the Amlogic A113X SoC and have encountered an issue with U-Boot during the boot process over UART. While I am able to connect via UART and observe the boot log, the system does not allow any interaction or command input. It seems that the manufacturer may have restricted this access, potentially violating the GNU GPL license.

Here are the details:

- *SoC:* Amlogic A113X - *Bootloader:* U-Boot 2015.01 (Jan 13 2023 - 10:30:19) - *Issue:* The device does not respond to input during the boot process over UART (no response to Ctrl+C, Enter, etc.) - *UART Log:*

AXG:BL1:d1dbf2:a4926f;FEAT:F0DC31BC:2000;POC:F;EMMC:800;NAND:0;READ:0;0.0;0.0;CHK:0; sdio debug board detected TE: 139689

BL2 Built : 10:38:43, Apr 14 2020. axg gf27ed33 - jenkins@walle02-sh

set vcck to 1100 mv set vddee to 950 mv Board ID = 3 CPU clk: 1200MHz DDR low power enabled DDR3 chl: Rank0 16bit @ 912MHz bist_test rank: 0 1c 07 32 26 10 3c 1e 06 36 27 10 3f 00 00 00 00 00 00 00 00 00 00 00 00 772 - PASS Rank0: 256MB(auto)-2T-13 AddrBus test pass! NAND init Load FIP HDR from NAND, src: 0x0000c000, des: 0x01700000, size: 0x00004000, part: 0 Load BL3x from NAND, src: 0x00010000, des: 0x01704000, size: 0x000b7c00, part: 0 NOTICE: BL31: v1.3(release):3edeb02 NOTICE: BL31: Built : 16:43:54, Apr 14 2020 NOTICE: BL31: AXG secure boot! NOTICE: BL31: BL33 decompress pass OPS=0x43 [Image: axg_v1.1.3494-9ec8345 2020-04-17 18:16:39 jenkins@walle02-sh] 25 0c 43 00 c3 ac bf b3 9f 7a e1 5b 3a 07 57 99 bl30:axg ver: 9 mode: 0 bl30:axg thermal0 [0.015883 Inits done] secure task start! high task start! low task start! ERROR: Error initializing runtime service opteed_fast

U-Boot 2015.01 (Jan 13 2023 - 10:30:19)

DRAM: 256 MiB Relocation Offset is: 0eeb0000 mmu cfg end: 0x20000000 mmu cfg end: 0x20000000 register usb cfg[0][1] = 000000000ff6e198 aml_i2c_init_port init regs for 2 NAND: get_sys_clk_rate_mtd() 292, clock setting 200! bus cycle0: 6,timing: 7 NAND device id: 98 da 90 15 76 16 NAND device: Manufacturer ID: 0x98, Chip ID: 0x98 (Toshiba A revision NAND 2Gib TC58NVG1S3HBAI4 ) get_sys_clk_rate_mtd() 292, clock setting 200! m3_nand_adjust_timing() sys_clk_rate 200, bus_c 6, bus_t 7 oob_fill_cnt =32 oob_size =64, bch_bytes =14 ecc mode:6 ecc_page_num=2 eep_need_oobsize=16 plane_num=1 writesize=0x800 ecc.size=0x200 bch_mode=1 oob avail size 6 Creating 1 MTD partitions on "A revision NAND 2Gib TC58NVG1S3HBAI4 ": 0x000000000000-0x000000200000 : "bootloader" A revision NAND 2Gib TC58NVG1S3HBAI4 initialized ok get_sys_clk_rate_mtd() 292, clock setting 200! bus cycle0: 6,timing: 7 NAND device id: 98 da 90 15 76 16 NAND device: Manufacturer ID: 0x98, Chip ID: 0x98 (Toshiba A revision NAND 2Gib TC58NVG1S3HBAI4 ) get_sys_clk_rate_mtd() 292, clock setting 200! m3_nand_adjust_timing() sys_clk_rate 200, bus_c 6, bus_t 7 oob_fill_cnt =32 oob_size =64, bch_bytes =14 ecc mode:6 ecc_page_num=2 eep_need_oobsize=16 PLANE change! plane_num=1 writesize=0x800 ecc.size=0x200 bch_mode=1 aml_nand_init :oobmul=1,oobfree.length=8, - oob_size=64 oob avail size 8 nbbt=20 nenv=24 nkey=32 ndtb=40 nddr=44 bbt_start=20 env_start=24 key_start=32 dtb_start=40 ddr_start=44 nbbt: info size=0x800 max_scan_blk=24, start_blk=20 nbbt : phy_blk_addr=20, ec=0, phy_page_addr=0, timestamp=1 nbbt free list: blockN=21, ec=-1, dirty_flag=0 blockN=22, ec=-1, dirty_flag=0 blockN=23, ec=-1, dirty_flag=0 aml_nand_scan_rsv_info 1134: page_num=1 aml_nand_scan_rsv_info 1137 nbbt valid addr: 280000 aml_nand_bbt_check 1258 bbt is valid, reading. aml_nand_read_rsv_info:446,read nbbt info to 280000 nenv: info size=0x10000 max_scan_blk=32, start_blk=24 nenv : phy_blk_addr=24, ec=0, phy_page_addr=0, timestamp=5 nenv free list: blockN=25, ec=0, dirty_flag=1 blockN=26, ec=-1, dirty_flag=0 blockN=27, ec=-1, dirty_flag=0 blockN=28, ec=-1, dirty_flag=0 blockN=29, ec=-1, dirty_flag=0 blockN=30, ec=-1, dirty_flag=0 blockN=31, ec=-1, dirty_flag=0 aml_nand_scan_rsv_info 1134: page_num=32 aml_nand_scan_rsv_info 1137 nenv valid addr: 310000 nkey: info size=0x8000 max_scan_blk=40, start_blk=32 nkey : phy_blk_addr=33, ec=0, phy_page_addr=0, timestamp=2 nkey free list: blockN=32, ec=0, dirty_flag=1 blockN=34, ec=-1, dirty_flag=0 blockN=35, ec=-1, dirty_flag=0 blockN=36, ec=-1, dirty_flag=0 blockN=37, ec=-1, dirty_flag=0 blockN=38, ec=-1, dirty_flag=0 blockN=39, ec=-1, dirty_flag=0 aml_nand_scan_rsv_info 1134: page_num=16 aml_nand_scan_rsv_info 1137 nkey valid addr: 430000 ndtb: info size=0x20000 max_scan_blk=44, start_blk=40 ndtb : phy_blk_addr=41, ec=0, phy_page_addr=0, timestamp=2 ndtb free list: blockN=40, ec=-1, dirty_flag=0 blockN=42, ec=-1, dirty_flag=0 blockN=43, ec=-1, dirty_flag=0 aml_nand_scan_rsv_info 1134: page_num=64 aml_nand_scan_rsv_info 1137 ndtb valid addr: 520000 nddr: info size=0x800 max_scan_blk=46, start_blk=44 nddr : phy_blk_addr=-1, ec=0, phy_page_addr=0, timestamp=0 nddr free list: blockN=44, ec=-1, dirty_flag=0 blockN=45, ec=-1, dirty_flag=0 aml_nand_scan_rsv_info 1134: page_num=1 nddr valid addr: fffffffffffe0000 aml_nand_rsv_info_check_except_bbt 1228 NO nddr exist tpl: off 8388608, size 8388608 NAND bbt detect factory Bad block at c000000 NAND bbt detect factory Bad block at c020000 Creating 7 MTD partitions on "A revision NAND 2Gib TC58NVG1S3HBAI4 ": 0x000000800000-0x000001000000 : "tpl" 0x000001000000-0x000001200000 : "misc" 0x000001200000-0x000002200000 : "boot_a" 0x000002200000-0x000003200000 : "boot_b" 0x000003200000-0x000007200000 : "system_a" 0x000007200000-0x00000b200000 : "system_b" 0x00000b200000-0x000010000000 : "data" NAND bbt detect factory Bad block at c000000 NAND bbt detect factory Bad block at c020000 A revision NAND 2Gib TC58NVG1S3HBAI4 initialized ok MMC: aml_priv->desc_buf = 0x000000000deae760 aml_priv->desc_buf = 0x000000000deb0aa0 SDIO Port B: 0, SDIO Port C: 1 uboot env amlnf_env_read : #### aml_nand_read_rsv_info:446,read nenv info to 310000 In: serial Out: serial Err: serial aml log : internal sys error! reboot_mode=cold_boot Start read misc partition datas! [burnup]Rd:Up sz 0x440 to align 0x1000 info->attemp_times = 12 info->active_slot = 0 info->slot_info[0].bootable = 1 info->slot_info[0].online = 1 info->slot_info[1].bootable = 1 info->slot_info[1].online = 0 info->attemp_times = 12 active slot = 0 cmd: imgread dtb boot_a ${dtb_mem_addr} [imgread]szTimeStamp[2024071615081273] [imgread]MTD pageShift 11, writesz 0x800 aml log : R-2048 check pass! aml log : R2048 check pass! [imgread]Enc dtb sz 0xe000 Amlogic multi-DTB tool Single DTB detected Net: sysnopsys gmac3.7 Phy 0 not found dwmac.ff3f0000amlkey_init() enter! amlnf_key_read: #### amlnf_key_read key data len too much aml_nand_read_rsv_info:446,read nkey info to 430000 [EFUSE_MSG]keynum is 4 MACADDR:*(from chipid)

Start read misc partition datas! [burnup]Rd:Up sz 0x440 to align 0x1000 info->attemp_times = 12 info->active_slot = 0 info->slot_info[0].bootable = 1 info->slot_info[0].online = 1 info->slot_info[1].bootable = 1 info->slot_info[1].online = 0 info->attemp_times = 12 active slot = 0 wipe_data=successful wipe_cache=successful Setting bus to 2 i2c_set_bus_num i2c sel 2 bus aml_i2c_init_port init regs for 2 gpio: pin GPIOZ_4 (gpio 18) value is 1 recovery_status= upgrade_step=2 s_version: U-Boot 2015.01 amlkey_init() enter! amlkey_init() 71: already init! [EFUSE_MSG]keynum is 4 [KM]Error:f[key_manage_query_size]L515:key[usid] not programed yet [KM]Error:f[key_manage_query_size]L515:key[mac] not programed yet InUsbBurn noSof

CONFIG_SYSTEM_AS_ROOT: null system_mode: 0 [imgread]szTimeStamp[2024071615081273] [imgread]secureKernelImgSz=0x609800 [burnup]Rd:Up sz 0x509800 to align 0x1000 aml log : R-2048 check pass! aml log : R2048 check pass! aml log : R2048 check pass! aml log : R2048 check pass! avb2: 0 save_power_post ... avb2: 0 ## Booting Android Image at 0x01080000 ... reloc_addr =ded9810 copy done Kernel command line: init=/sbin/init rootfstype=ubifs [store]Is good fdt check header, no need decrypt! load dtb from 0x1000000 ...... Amlogic multi-DTB tool Single DTB detected Uncompressing Kernel Image ... OK kernel loaded at 0x01080000, end = 0x01a5b200 Loading Ramdisk to 0dcf0000, end 0de9d800 ... OK Loading Device Tree to 000000000dce0000, end 000000000dceffe6 ... OK fdt_fixup_memory_banks, reg:0000000000000000

Starting kernel ...

uboot time: 2751820 us

I understand that U-Boot has been modified by the manufacturer, which complicates the situation. I am seeking advice on the following:

- Are there any known methods or workarounds to regain control over the U-Boot environment in such scenarios? - Are there any specific forums or community resources where I might find additional help or similar cases?

Any guidance or suggestions would be greatly appreciated. Thank you in advance for your assistance!

Best regards, Mike