The firmware provided here is royalty free but unfortunately is impossible to provide it as open source code by the Microchip/Atmel policy applied to this device.
Full information is under NDA, please contact your local Microchip/Atmel sale representative to know how to get more and full documentation about this device.
Download the binary image of AVR firmware from this link:
On the YARM-2-DEV adapter switch the MCU selector to the AVR possition.
Launch Atmel Studio 7 and select Tools -> Device Programming, then follow these steps to load the firmware inside the ATA8510 EEPROM
To getting started with Atmel Studio 7 and Yarm read this article: