Firmware (flash file) is available here free direct download using link I have share at the buttom of this page, incase if you were already searching to download Rockchip RK22928-g Firmware, then you have come to right place. Download it now using link posted below.
This Rockchip firmware is for RK22928-g cpu, 7 inch tab-1024x600 resolution. Firmware (Rom / flash file)name is Tsintech_i30_RileyROM_1.1.1(0riginal). Get it here