WPJ428 + SIMCOM 8202G
=====================

We try to build a FOSS 5GNR Router with OpenWRT.
Some challenges we have encountered so far:
  - OpenWRT stable misses a patch to enable our board ethernet port -> we compile from source
  - The Modem Manager simtech plugin does not declare 5GNR

## Flash the router

(Configure your computer with a static IP address 192.168.1.2/24 and make sure you have a running tftp server containing your image)

First connect your UART cable on the router:

![UART](img/uart.jpg)

Launch minicom

```
sudo minicom -D /dev/ttyUSB0
```

Then boot the router. Press repeatidly `[ENTER]` to get the following prompt:

```
(IPQ40xx) #
```

Then enter the following commands:

```
set ipaddr 192.168.1.1
set serverip 192.168.1.2
ping ${serverip}
sf probe
tftpboot 0x84000000 openwrt-ipq40xx-generic-compex_wpj428-squashfs-sysupgrade.bin
sf erase 0x00180000 +$filesize
sf write 0x84000000 0x00180000 $filesize
bootipq
```

## Compile

```
make menuconfig
scripts/diffconfig.sh > ../wpj428/config
make download
make -j $(nproc)
```

To inject a config file:

```bash
# Append changes to bottom of .config
cat config >> .config
# Apply changes
make defconfig
make download
make -j $(nproc)
```

## Logs

uboot logs:

```
Format: Log Type - Time(microsec) - Message - Optional Info
Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
S - QC_IMAGE_VERSION_STRING=BOOT.BF.3.1.1-00118
S - IMAGE_VARIANT_STRING=DAABANAZA
S - OEM_IMAGE_VERSION_STRING=CRM
S - Boot Config, 0x00000021
S - Reset status Config, 0x00000000
S - Core 0 Frequency, 0 MHz
B -       261 - PBL, Start
B -      1339 - bootable_media_detect_entry, Start
B -      1679 - bootable_media_detect_success, Start
B -      1693 - elf_loader_entry, Start
B -      5073 - auth_hash_seg_entry, Start
B -      7219 - auth_hash_seg_exit, Start
B -    577690 - elf_segs_hash_verify_entry, Start
B -    695375 - PBL, End
B -    695399 - SBL1, Start
B -    786439 - pm_device_init, Start
D -         7 - pm_device_init, Delta
B -    787885 - boot_flash_init, Start
D -     52818 - boot_flash_init, Delta
B -    844845 - boot_config_data_table_init, Start
D -      3835 - boot_config_data_table_init, Delta - (419 Bytes)
B -    852054 - clock_init, Start
D -      7575 - clock_init, Delta
B -    864102 - CDT version:2,Platform ID:8,Major ID:1,Minor ID:0,Subtype:0
B -    867516 - sbl1_ddr_set_params, Start
B -    872614 - cpr_init, Start
D -         2 - cpr_init, Delta
B -    876996 - Pre_DDR_clock_init, Start
D -         4 - Pre_DDR_clock_init, Delta
D -     13176 - sbl1_ddr_set_params, Delta
B -    890735 - pm_driver_init, Start
D -         2 - pm_driver_init, Delta
B -    960961 - sbl1_wait_for_ddr_training, Start
D -        28 - sbl1_wait_for_ddr_training, Delta
B -    976579 - Image Load, Start
D -    151978 - QSEE Image Loaded, Delta - (297240 Bytes)
B -   1128985 - Image Load, Start
D -      1447 - SEC Image Loaded, Delta - (2048 Bytes)
B -   1139420 - Image Load, Start
D -    211388 - APPSBL Image Loaded, Delta - (432219 Bytes)
B -   1351204 - QSEE Execution, Start
D -        60 - QSEE Execution, Delta
B -   1357421 - SBL1, End
D -    664130 - SBL1, Delta
S - Flash Throughput, 2007 KB/s  (731926 Bytes,  364613 us)
S - DDR Frequency, 537 MHz


U-Boot 2012.07 [Chaos Calmer 15.05.1,r35193] (Jul 25 2017 - 11:36:26)

smem ram ptable found: ver: 1 len: 3
DRAM:  256 MiB
machid : 0x8010000
NAND:  SF: Detected MX25L25635E with page size 4 KiB, total 32 MiB
ipq_spi: page_size: 0x100, sector_size: 0x1000, size: 0x2000000
32 MiB
MMC:   
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
machid: 8010000
flash_type: 0
Hit any key to stop autoboot:  0 
Net:   MAC0 addr:4:f0:21:65:18:12
PHY ID1: 0x4d
PHY ID2: 0xd0b1
ipq40xx_ess_sw_init done
eth0
```

## Sources

  - [All the commits in OpenWRT about the WPJ428](https://git.openwrt.org/?p=openwrt%2Fopenwrt.git&a=search&h=HEAD&st=commit&s=WPJ428)
  - https://openwrt.org/docs/guide-developer/build-system/use-buildsystem