TL-WN722N的芯片是AR9271，驅動型號是 ath9k_htc
下面是在Linux下安裝過程：
01 root@linuxidc www.linuxidc.com:~# lsusb
02 Bus 001 Device 003: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
03 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
04 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
05 root@linuxidc www.linuxidc.com:~# mkdir ar9271
06 root@linuxidc www.linuxidc.com:~# cd ar9271/
07 root@linuxidc www.linuxidc.com:~/ar9271# git clone git://git.kernel.org/pub/scm/linux/kernel/git/dwmw2/linux-firmware.git
08 root@linuxidc www.linuxidc.com:~/ar9271# cp ./linux-firmware/ar9271.fw /lib/firmware
09 root@linuxidc www.linuxidc.com:~/ar9271# wget http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2.6.tar.bz2
10 root@linuxidc www.linuxidc.com:~/ar9271# tar -jxvf compat-wireless-2.6.tar.bz2
11 root@linuxidc www.linuxidc.com:~/ar9271# cd compat-wireless-2010-10-04/
12 root@linuxidc www.linuxidc.com:~/ar9271/compat-wireless-2010-10-04# ./scripts/driver-select ath9k_htc
13 Processing new driver-select request…
14 Backing up makefile: Makefile.bk
15 Backup exists: Makefile.bk
16 Backup exists: Makefile.bk
17 Backing up makefile: drivers/net/wireless/Makefile.bk
18 Backing up makefile: drivers/net/wireless/ath/Makefile.bk
19 Backing up makefile: net/wireless/Makefile.bk
20 Backing up makefile: drivers/net/Makefile.bk
21 Backing up makefile: drivers/ssb/Makefile.bk
22 Backing up makefile: drivers/misc/eeprom/Makefile.bk
23 root@linuxidc www.linuxidc.com:~/ar9271/compat-wireless-2010-10-04# make
24 root@linuxidc www.linuxidc.com:~/ar9271/compat-wireless-2010-10-04# make install
25 root@linuxidc www.linuxidc.com:~/ar9271/compat-wireless-2010-10-04# cd ~/ar9271/
26 root@linuxidc www.linuxidc.com:~/ar9271# reboot
重啟後，用 iwconfig 就能看到 wlan0 了。
值得一提的問題：
如果重啟後看不到 wlan0 ，用 dmesg | grep -e ath -e wlan 看下是不是有錯誤。
usb 1-1: ath9k_htc: Firmware – ar9271.fw not found
如果是這個not found錯誤，那說明你沒有把 ar9271.fw 拷貝到 /lib/firmware 下面。
ar9271.fw 可以直接到這裡下載，不過只能通過raw 下載，否則下載的文件大小都是0字節的。用 raw 連接下載需要更改文件名。
還有一種安全一點辦法就是上面用到的 git 命令，把所有的 fw 都下下來，這樣就不用當心下載錯什麼問題，就是用的時間稍長些。
虛擬機上的問題：
root@linuxidc www.linuxidc.com:~# dmesg | grep -e ath -e wlan
md: multipath personality registered for level -4
usb 1-1: ath9k_htc: Firmware – ar9271.fw download failed
ath9k_hif_usb: probe of 1-1:1.0 failed with error -22
usbcore: registered new interface driver ath9k_hif_usb
搜索到的全是驅動源文件，試試沒有安裝 VMTools 的
BT4 R1能直接識別出是 Atheros Communications, Inc. AR9271 802.11n ，如果是BT4 ，只能識別出是 Atheros Communications 。
本文來自CSDN博客，轉載請標明出處：http://blog.csdn.net/echo7L/archive/2011/02/19/6195617.aspx
