sorry but on the page you can't get for linux sparc processor and the customer service send me this:
The Linux drivers available from ATI are provide are "as is".
You may be able to get further assistance from the Linux community
at the links below:
http://www.linux.org/help/index.html
http://www.linuxdoc.org/
http://www.xfree86.org/ is not a x86 processor!!
To report issues with Linux drivers you can submit an online ticket using
the “Linux Driver Feedback” Category, and your report will be
received and reviewed/tested by our driver team. Please note that your report
will only be responded to if we require additional information
I didn't find the correct driver