It uses that ath_pci kernel module and here is the relevant bit from /var/log/messages:
[17179594.568000] wlan: 0.8.6.0 (EXPERIMENTAL)
[17179594.576000] ath_rate_sample: 1.2
[17179594.596000] ath_pci: 0.9.6.0 (EXPERIMENTAL)
[17179594.600000] ACPI: PCI Interrupt 0000:02:0b.0[A] -> GSI 22 (level, low) -> IRQ 185
[17179595.180000] Build date: Jun 15 2006
[17179595.180000] Debugging version (IEEE80211)
[17179595.180000] ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
[17179595.180000] ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[17179595.180000] ath0: H/W encryption support: WEP AES AES_CCM TKIP
[17179595.180000] ath0: mac 7.8 phy 4.5 radio 5.6
[17179595.180000] ath0: Use hw queue 1 for WME_AC_BE traffic
[17179595.180000] ath0: Use hw queue 0 for WME_AC_BK traffic
[17179595.180000] ath0: Use hw queue 2 for WME_AC_VI traffic
[17179595.180000] ath0: Use hw queue 3 for WME_AC_VO traffic
[17179595.180000] ath0: Use hw queue 8 for CAB traffic
[17179595.180000] ath0: Use hw queue 9 for beacons
[17179595.180000] Debugging version (ATH)
[17179595.180000] ath0: Atheros 5212: mem=0x41000000, irq=185
$ sudo lspci -vvx
....
0000:02:0b.0 Ethernet controller: Atheros Communications, Inc.: Unknown device 001a (rev 01)
Subsystem: Belkin: Unknown device 700c
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR-
Interrupt: pin A routed to IRQ 185
Region 0: Memory at 41000000 (32-bit, non-prefetchable) [size=64K]
Capabilities: [44] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=2 PME-
00: 8c 16 1a 00 06 01 90 02 01 00 00 02 08 a8 00 00
10: 00 00 00 41 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 01 50 00 00 99 17 0c 70
30: 00 00 00 00 44 00 00 00 00 00 00 00 05 01 0a 1c
