How to setup Marvell 88w8686 SDIO wifi

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How to setup Marvell 88w8686 SDIO wifi Overview of How-To

This How-To is meant to be a starting point for people to learn setup the wifi on IGEP v2 devices as quickly and easily as possible.

Feedback and Contributing

At any point, if you see a mistake you can contribute to this How-To.

Setup basics

• libertas: Marvell Libertas 8385/8686/8688 SDIO 802.11b/g card
• firmware: 9.70.3p24 ( download from )

SDIO card should be showed after the image is downloaded to the board.

mmc1: new SDIO card at address 0001

The firmware binaries sd8686_helper.bin and sd8686.bin should be in /lib/firmware directory.

NOTE: It appears that the helper file is named differently in newer versions of the firmware (helper_sd.bin). I renamed it to "sd8686_helper.bin". Also, the following command assumes that you have compiled the libertas driver as a module. If you use the "igep0020_defconfig" during kernel compilation, you will want to menuconfig and make libertas a module instead of a built in kernel.

To make the SDIO WIFI module work load the libertas_sdio module

# modprobe libertas_sdio libertas_sdio: Libertas SDIO driver libertas_sdio: Copyright Pierre Ossman libertas_sdio mmc1:0001:1: firmware: requesting sd8686_helper.bin libertas_sdio mmc1:0001:1: firmware: requesting sd8686.bin libertas: 00:13:e0:c3:0c:3c, fw 9.70.3p24, cap 0x00000303 libertas: unidentified region code; using the default (USA) libertas: PREP_CMD: command 0x00a3 failed: 2 libertas: PREP_CMD: command 0x00a3 failed: 2 libertas: eth1: Marvell WLAN 802.11 adapter

NOTE: I did not see any of the above output when I modprobe'd libertas_sdio on a 2.6.35-rc6 kernel.

Now you can connect this wifi module to an AP. First of all, you'll check if your devices is detected.

# iwconfig eth1 IEEE 802.11b/g ESSID:"" Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated Bit Rate:0 kb/s Tx-Power=18 dBm Retry short limit:8 RTS thr=2347 B Fragment thr=2346 B Encryption key:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Next, you will set up the interface

# ifconfig eth1 up eth1 Link encap:Ethernet HWaddr 00:13:E0:C3:0C:3C UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

and you can scan for an AP

# iwlist eth1 scan Cell 04 - Address: 00:18:84:81:46:E2 ESSID:"MyPlace" Mode:Managed Frequency:2.427 GHz (Channel 4) Quality=100/100 Signal level=-39 dBm Noise level=-96 dBm Encryption key:off Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s 11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s

Now, is time to associate to your AP

# iwconfig eth1 txpower auto essid MyPlace channel 4 eth1 IEEE 802.11b/g ESSID:"MyPlace" Mode:Managed Frequency:2.427 GHz Access Point: 00:18:84:81:46:E2 Bit Rate:0 kb/s Tx-Power=13 dBm Retry short limit:8 RTS thr=2347 B Fragment thr=2346 B Encryption key:off Power Management:off Link Quality=97/100 Signal level=-43 dBm Noise level=-94 dBm Rx invalid nwid:0 Rx invalid crypt:3109 Rx invalid frag:0 Tx excessive retries:13 Invalid misc:3315 Missed beacon:0

and get and ip address

# udhcpc -i eth1 udhcpc (v1.9.1) started Sending discover... Sending select for 192.168.10.216... Lease of 192.168.10.216 obtained, lease time 43200 adding dns 192.168.10.1

Last, you can test the network interface.

# ping -c 1 192.168.10.1 PING 192.168.10.1 (192.168.10.1): 56 data bytes 64 bytes from 192.168.10.1: seq=0 ttl=64 time=16.327 ms --- 192.168.10.1 ping statistics --- 1 packets transmitted, 1 packets received, 0% packet loss round-trip min/avg/max = 16.327/16.327/16.327 ms How to debug the libertas driver

From:

To enable debug on the wireless (libertas) driver you may write to the libertas_debug '/sys' file:

echo LBS_DEBUG_FLAGS > /sys/module/libertas/parameters/libertas_debug

You can calculate the value for LBS_DEBUG_FLAGS using the table bellow (just add up the values for the flags you want to activate).

Debug Flag Name	Flag Hex value	Description(*)
LBS_DEB_ENTER	0x00000001	function entrance
LBS_DEB_LEAVE	0x00000002	function exit
LBS_DEB_MAIN	0x00000004	main libertas library code
LBS_DEB_NET	0x00000008	interaction with network subsystem
LBS_DEB_MESH	0x00000010	wireless mesh network
LBS_DEB_WEXT	0x00000020	interaction with wireless extensions
LBS_DEB_IOCTL	0x00000040	misc IOCTLs
LBS_DEB_SCAN	0x00000080	scanning for APs
LBS_DEB_ASSOC	0x00000100	associating ton an AP
LBS_DEB_JOIN	0x00000200	joining an IBSS?
LBS_DEB_11D	0x00000400	802.11d country settings
LBS_DEB_DEBUGFS	0x00000800	interaction with the debugfs subsystem
LBS_DEB_ETHTOOL	0x00001000	interaction with ethtool subsystem
LBS_DEB_HOST	0x00002000	communication between host and wlan chip
LBS_DEB_CMD	0x00004000	command and response processing
LBS_DEB_RX	0x00008000	packet reception
LBS_DEB_TX	0x00010000	packet transmission
LBS_DEB_USB	0x00020000	interaction with USB subsystem
LBS_DEB_CS	0x00040000	interaction with card services subsystem
LBS_DEB_FW	0x00080000	firmware downloading
LBS_DEB_THREAD	0x00100000	main libertas worker thread
LBS_DEB_HEX	0x00200000	turn on detailed hex dumps
LBS_DEB_SDIO	0x00400000	interaction with SDIO subsystem
(*) Description taken from (by Holger Schurig)

Example:
To activate scanning (LBS_DEB_SCAN), associating (LBS_DEB_ASSOC), command (LBS_DEB_CMD) and host (LBS_DEB_HOST):

echo 0x6180 > /sys/module/libertas/parameters/libertas_debug

The output will be post to the kernel ring buffer. You can display it with the dmesg command:

dmesg

You can also use the lbsdebug tool, from Holger Shurig, git tree available .

How to get WIFI active upon system start (using a WPA2 access-point)

Tested configuration:

• IGEP v2 board
• Ubuntu Linux provided on the SD-card
• WIFI access point with WPA-PSK encryption method.

Basically you have to create/modify two files:

1. create file /etc/wpa_supplicant.conf
2. modify /etc/network/interfaces

Here are the details.

To create /etc/wpa_supplicant.conf do:

wpa_passphrase "your SSID" yourPassword > /etc/wpa_supplicant.conf

Now add the following lines at the end of this file:

proto=WPA2 key_mgmt=WPA-PSK pairwise=CCMP

Then modify /etc/network/interfaces

Change the line

auto eth0 into #auto eth0

Add the next lines (replace eth2 by your wifi interface):

iface eth2 inet dhcp wpa-conf /etc/wpa_supplicant.conf

To check if your /etc/wpa_supplicant.conf file is correct you can type

wpa_supplicant -ieth2 -c/etc/wpa_supplicant.conf -d(come from )http://huangjianming31.blog.163.com/blog/static/34740871201082682735715/