Ubuntu 10.04下安裝Atheros AR9271驅動

 1、前言
找到一個水星MW150U的無線網卡，在Ubuntu 11.10下可以自動識別，但換到10.04下就不認了，想想應該是驅動沒安裝好。
網上查了查，發現和TP-Link TL-WN721N,TL-WN722N、迅捷FW150U一樣，都使用Atheros AR9271的晶片。
root@ubuntu:~# uname -a
Linux ubuntu 2.6.32-33-generic #70-Ubuntu SMP Thu Jul 7 21:09:46 UTC 2011 i686 GNU/Linux
root@ubuntu:~# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=10.04
DISTRIB_CODENAME=lucid
DISTRIB_DESCRIPTION="Ubuntu 10.04.3 LTS"
root@ubuntu:~# lsusb
Bus 001 Device 003: ID 0cf3:9271 Atheros Communications, Inc.

2、山窮水盡
下載 http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2.6.tar.bz2
root@ubuntu:~# tar -jxvf compat-wireless-2.6.tar.bz2
root@ubuntu:~# cd compat-wireless-2010-10-04/
root@ubuntu:~/compat-wireless-2011-10-22# ./scripts/driver-select ath9k_htc
root@ubuntu:~/compat-wireless-2011-10-22# make
root@ubuntu:~/compat-wireless-2011-10-22# make install
root@ubuntu:~/compat-wireless-2011-10-22# reboot
重啟後發現還是沒找到無線網卡wlan0，無奈只有繼續Google。

3、柳暗花明
發現一句“This driver requires firmware.”，
並且沒有把 ar9271.fw 拷貝到 /lib/firmware目錄下。看到http://linuxwireless.org/en/users/Drivers/ath9k_htc上面的提示：
Older firmware map:AR9271 - ar9271.fw
Newer firmware map:AR9271 - htc_9271.fw
於是下載了新的htc_9271.fw並拷貝到 /lib/firmware下，重複第二步的操作，OK了。

4、後記
root@ubuntu:~# iwconfig
wlan0     IEEE 802.11bgn  ESSID:"OOXX" 
          Mode:Managed  Frequency:2.437 GHz  Access Point: OO:XX:OO:XX:OO:XX
          Bit Rate=150 Mb/s   Tx-Power=20 dBm  
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-37 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:90   Missed beacon:0

參考資料：

http://linuxwireless.org/en/users/Drivers/ath9k_htc

http://www.rover12421.com/2010/10/06/tl-wn722n-driver-installed-on-the-bt4-r1.html