As shown in the release note
, both R310 and R600 are supported in 10.4 Refresh 2 (aka 10.4.0.0.98) so in terms of the AP support you are okay. Always worth reading through the release note
before you do the upgrade.
Page 6 of the release note also shows the supported upgrade path, which the oldest supported for direct upgrade is 10.2.0.0.189 (10.2 GA), so you will need to upgrade to this first before moving to 10.4.0.0.98. So the upgrade path from 184.108.40.206.41 (3.5 years old) would be as follow (checking the relevant release notes):
Hope it helps.