Hi Marco,
I believe the manufacturer JTAG programmers typically only support microcontrollers for that manufacturer.
There are generic JTAG programmers that work with many different targets. For example, we use Segger JLink debuggers a lot internally.
I’d recommend taking a look at OpenOCD’s hardware page: http://openocd.org/doc/html/Debug-Adapter-Hardware.html, since your best bet for software with most generic devices will be OpenOCD.
Alex