Libertas Debug

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
LBS_DEB_SYSFS	0x00800000
LBS_DEB_SPI	0x01000000
LBS_DEB_CFG80211	0x02000000
(*) Description taken from lbsdebug.c (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 here.