Except that I am almost 100% certain [1] that they are using the RS9113 which as I suspected IS updateable (in some cases wirelessly) [2]. In fact in the Linux Firmware tree they have multiple firmware images depending on how you want the device to function. [3]
>The host MCU can update the RS9113 module FW over UART using the kermit protocol or over SPI using the proprietary binary protocol. The default UART baud rate is 115200 kbps 8N1 with xon/off or no flow control. For baud rate >900000, hardware flow control must be used. Refer to the WiSeConnect PRM for more info - the "Upgrading the Firmware in Module" section discusses the SPI mode and "Firmware Upgradation" section discusses the UART mode.
>The host MCU can update the RS9113 module FW over UART using the kermit protocol or over SPI using the proprietary binary protocol. The default UART baud rate is 115200 kbps 8N1 with xon/off or no flow control. For baud rate >900000, hardware flow control must be used. Refer to the WiSeConnect PRM for more info - the "Upgrading the Firmware in Module" section discusses the SPI mode and "Firmware Upgradation" section discusses the UART mode.
[1] https://source.puri.sm/bob.ham/image-builder/commit/856c9caf... [2] http://www.redpinesignals.com/faqs.php [3] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/lin...