Full factory reset

[adeebshihadeh]

Part of #59.

flash.comma.ai should be able to bring a device into a complete factory state (except giving your device a new private key):

• I pushed all the images to agnos-builder. We need to generate a manifest of all the images, just like we do with ota.json for AGNOS OTA updates.
• Here's the code for our internal QDL flasher we run in production:

      print("Connecting...")
      try:
        f, info = connect(device, False)
      except Exception:
        f, info = connect(device, True)
      soc_serial = info['serial']
      device_info['hardware_id'] = info['msm_hw_id']

      device_info['serial'] = f.get_android_serial()

      print("Serial: %s" % device_info['serial'])
      print("SOC Serial: %s" % soc_serial)
      logger.log_start(device_info)

      # Erase device
      for lun in range(6):
        print(f"Erasing lun {lun}")
        f.erase_lun(lun)

      # Flash partition tables
      print("Flashing partition tables")
      for lun, name, start_sector, num_sectors, hashsum in PARTITION_TABLES:
        print(f"Programming '{name}'")
        safe_program_raw(f, lun, start_sector, num_sectors, f"{BASE_FIRMWARE_PATH}/{name}.bin", hashsum)

      # Fix lun partition table (resizes userdata), since different UFS chips have a slight variance in total size
      print("Fixing lun 0 and 5 partition table")
      f.fix_gpt(lun=0)
      f.fix_gpt(lun=5)

      # Flash all partitions
      for lun, name, filename, hashsum in QDL_FLASH_ARRAY:
        safe_program_partition(f, lun, name, f"{BASE_FIRMWARE_PATH}/{filename}", hashsum)

      # Set bootable LUN
      f.set_bootable_storagedrive(lun=1)

      # Reboot
      f.reset()

[adeebshihadeh]

We now have a manifest with everything needed here, including a userdata image that can be flashed. That manifest will also be used in comma 3X provisioning, so it's guaranteed to be up to date. Eventually, it'll be pulled out of openpilot and served by an updater API.

Unfortunately, squashfs didn't work out, so we'll need to handle streaming decompression and sparse images to get the best speeds.

https://github.com/commaai/openpilot/pull/34471/files#diff-9a0ce09e3abf35dc951d2dea059bed18e2329be6816e045d07de5f7b67286b9b