Hi, Thanks a lot for the information.
On Fri, Dec 6, 2019 at 2:01 PM Adrian Chadd <adrian.ch...@gmail.com> wrote: > Hi! > > I've documented the layout in the wiki: > > wiki.freebsd.org/dev/ath(4) and wiki.freebsd.org/dev/ath_hal(4) . You > should start there. > > The HAL code is a bit twisty: > > * the driver - if_ath_*[ch] is common for everything; > * the if_ath_pci.c code detects the NIC and creates the if_ath context > and sets up the driver; > * the ar9287 related bits are in sys/dev/ath/ath_hal/ar9002/ar9287_*.[ch] > * I think it also uses a bit of code in the ar9280_.*[ch] and the RF > frontend in that directory > * the bulk of the MAC support is the same as the other 11n chips, and > that's in sys/dev/ath/ath_hal/ar5416/ ; and > * to save code duplication, the ar5416 HAL actually uses the code in > sys/dev/ath/ath_hal/ar5212/ where the chipset support is the same. > > The reasons are! > > * The AR5416 is the first 11n chipset by atheros, and although the > radio and chunks of the MAC are different (to do 11n!), the queue and > airtime management parts of the MAC are the same as as the AR5212. So > to save on code duplication, the original contributor called the > AR5212 routines from the AR5416 HAL where the hardware was the same; > * The AR9287 is an evolution of the AR9280 NIC, albeit 2G only with > some specific extensions which we don't support. > > I hope that helps! > > > > -adrian > _______________________________________________ freebsd-wireless@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
