在Linux安裝USB無線網(wǎng)卡教學(xué)課件

1、在Linux安裝USB無線網(wǎng)卡ProposalBackground動機(jī)有一張?zhí)柗Q支援Linux的USB無線網(wǎng)卡雖然有附驅(qū)動程式但總是不能成功編譯網(wǎng)路上有搜尋到幾種修改driver的方法但有待驗證USB無線網(wǎng)卡PLANEX GW-US54GZL IEEE802.11g USB2.0 攜帶型無線網(wǎng)路卡.tw/product/soho/wireless/gw-us54gzl.htm使用ZD1211晶片.tw/product/ZD1211.asp支援kernel 2.4.x與2.6.xZD1211晶片Block Diagram選用哪個driver好呢？驅(qū)動程式來源From Planex (http:/

2、.tw).tw/download/wireless/gw-us54gzl.htmDriver version : From ZyDas (http:/.tw).tw/downloads/download-1211.aspDriver version : 由於ZyDas公司提供的driver比較新，所以就選用它了沒有kernel source怎麼辦？http:/linux/RPM/安裝kernel devel即可ZyDas的driver第一步：當(dāng)然是把它的tarball給解開啦第二步：必須要修改它的Makefile，將kernel source的位址寫上去第三步：make 與 make inst

3、all !它含有兩個晶片的driver：zd1211與zd1211b。使用make ZD1211REV_B=0就只會編譯zd1211但是在hotplug時似乎不會自動載入，必須手動modprobeZD1211的driver載入 modprobe v zd1211 lsmodModule Size Used byzd1211 263504 0 tail /var/log/messagesDebug工具附有兩個debug工具apdbgmenudbg安裝方法 make debug目標(biāo)將USB無線網(wǎng)卡在Linux上成功安裝運作hotplug了解USB無線網(wǎng)卡在Linux的driver架構(gòu)src/zdu

4、sb.c在Linux安裝USB無線網(wǎng)卡Final Projecthotplug問題出在哪？由於網(wǎng)路上有人抱怨使用此晶片的廠商與產(chǎn)品太多，driver常來不及更新因此假設(shè)問題出在Vendor ID與Device ID取得USB裝置的基本資料 (1/2)USB裝置在連接到電腦時， /var/log/messages 會有訊息提示，如下usb 4-3: new high speed USB device using ehci_hcd and address 9 ehci_hcd : USB 2.0 Enhanced Host Controller4 : bus number9 : device nu

5、mber取得USB裝置的基本資料 (2/2)USB裝置在連接到電腦後，資訊會更新在 /proc/bus/usb/devices 這個檔案T: Bus=04 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 9 Spd=480 MxCh= 0D: Ver= 2.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs= 1P: Vendor=2019 ProdID=c007 Rev=47.21S: Manufacturer=PLANEXS: Product=PLANEX GW-US54GZLC:* #Ifs= 1 Cfg#= 1 Atr=8

6、0 MxPwr=500mAI: If#= 0 Alt= 0 #EPs= 4 Cls=ff(vend.) Sub=00 Prot=00 Driver=zd1211E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0msE: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0msE: Ad=83(I) Atr=03(Int.) MxPS= 64 Ivl=125usE: Ad=04(O) Atr=03(Int.) MxPS= 64 Ivl=125usHotPlug修復(fù) zdusb.c (1/3)static struct usb_device_id

7、 zd1211_ids = (省略) USB_DEVICE(VENDOR_3COM, PRODUCT_A727) , USB_DEVICE(0 x2019, 0 xc007) , /加入這項 USB_DEVICE(0 x2019, 0 xc008) ,(省略)HotPlug修復(fù) zdusb.c (2/3)將zdusb.c修改完成後重新編譯出模組測試結(jié)果成功!HotPlug修復(fù) zdusb.c (3/3)rootTony # tail -17 /var/log/messageskernel: usb 4-3: new high speed USB device using ehci_hcd an

8、d address 11kernel: usb 4-3: configuration #1 chosen from 1 choicekernel:kernel: _ _ _ _kernel: |_ / _| _ / / _|kernel: / / | | | | | |/ _ _ kernel: / /| |_| | |_| / _ _) |kernel: /_, |_/_/ _/kernel: |_/kernel: zd1211 - version kernel: Release Ver = 4721kernel: EEPORM Ver = 4330kernel: PA type: 0ker

9、nel: AiroHa AL2230RFkernel: AllowedChannel = 000107ffkernel: Region:48kernel: usbcore: registered new driver zd1211無線網(wǎng)卡運作情形 (1/2)rootTony # ifconfig eth2eth2Link encap:Ethernet HWaddr 00:90:CC:CC:CE:84inet addr:0 Bcast:55 Mask:inet6 addr: fe80:290:ccff:fecc:ce84/64 Scope:LinkUP BROADCAST RUNNING MUL

10、TICAST MTU:1500 Metric:1RX packets:6 errors:0 dropped:0 overruns:0 frame:0TX packets:2 errors:0 dropped:0 overruns:0 carrier:0collisions:0 txqueuelen:1000RX bytes:491 (491.0 b) TX bytes:458 (458.0 b)無線網(wǎng)卡運作情形 (2/2)rootTony # iwconfig eth2 essid CD0rootTony # iwconfig eth2eth2802.11b/g NIC ESSID:CD0Mo

11、de:Managed Frequency=2.462 GHz Access Point: 00:80:C8:37:BF:77Bit Rate:11 Mb/sRetry:off RTS thr=2432 B Fragment thr:offEncryption key:offPower Management:offLink Quality:75/100 Signal level:72/100 Noise level:7/100Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0Tx excessive retries:261 Invalid

12、 misc:3 Missed beacon:0usbnet.c/drivers/usb/net/usbnet.cAuthor : David BrownellUSB Network Driver Frameworkusbnet.c (1/13)int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)判斷endpoint方向(bEndpointAddress) (in/out)種類(bmAttributes) (USB_ENDPOINT_XFER_INT/BULK)usbnet.c (2/13)static

13、int init_status (struct usbnet *dev, struct usb_interface *intf)初始化讀取並設(shè)定設(shè)定最大封包、速度包含kmallocvoid usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb)收到封包後更新統(tǒng)計資料usbnet.c (3/13)static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list)Delaying (spinlock)void usbnet_d

14、efer_kevent (struct usbnet *dev, int work)Delaying (kevent)usbnet.c (4/13)static int usbnet_change_mtu (struct net_device *net, int new_mtu)改變MTUstatic struct net_device_stats *usbnet_get_stats (struct net_device *net)回傳usbnet結(jié)構(gòu)中stat部分usbnet.c (5/13)static void rx_submit (struct usbnet *dev, struct

15、urb *urb, gfp_t flags)準(zhǔn)備urb(USB Request Block)使用usb_submit_urb()將bulk urb送出至USB core或掛到queue尾端static void rx_complete (struct urb *urb, struct pt_regs *regs)根據(jù)urb結(jié)構(gòu)的status變數(shù)得知狀態(tài)並做各種處理，最後用rx_submit()將urb送出usbnet.c (6/13)static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)使用usb_unlink_u

16、rb()static int usbnet_stop (struct net_device *net)usbnet結(jié)束時的處理使用remove_wait_queue()與usb_kill_urb()將urb清乾淨(jìng)usbnet.c (7/13)static int usbnet_open (struct net_device *net)usbnet的開啟與初始void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)modinfousbnet.c (8/13)static void kevent (

17、void *data)判斷usbnet結(jié)構(gòu)的flag得到狀態(tài)對以下event狀態(tài)進(jìn)行動作#define EVENT_TX_HALT0#define EVENT_RX_HALT1#define EVENT_RX_MEMORY2#define EVENT_LINK_RESET4usbnet.c (9/13)static void tx_complete (struct urb *urb, struct pt_regs *regs)根據(jù)urb結(jié)構(gòu)status變數(shù)得狀態(tài)並做各種處理沒有將urb送出static int usbnet_start_xmit (struct sk_buff *skb, st

18、ruct net_device *net)usb_fill_bulk_urb()準(zhǔn)備bulk urbusb_submit_urb()送出urbusbnet.c (10/13)Int usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)呼叫usbnet_get_endpoints()進(jìn)行初始動作usb_set_intfdata()儲存data pointernetif_device_attach()usbnet.c (11/13)void usbnet_disconnect (struct usb_interface *intf)usb_get_intfdata()查閱資料usb_set_intfdata()將device部份設(shè)為NULLunregister_netdev()usbnet.c (12/13)int us