ath9k and ath9k_htc debugging This page documents the debugging facilities available for ath9k and ath9k_htc

1. ath9k and ath9k htc debugging 2. Enabling debug 3. Debugfs files

1. Debugfs files for ath9k 2. Debugfs files for ath9k htc

Enabling debug If you have issues with ath9k or ath9k_htc you can enable debug. You will first need to enable the Kconfig option (CONFIG_ATH_DEBUG):

Device Drivers ---> [*] Network device support --->

Wireless LAN ---> Atheros Wireless Cards --->

[*] Atheros wireless debugging

Then you can use the module parameter debug. We cover below the different available debug levels you can use.

enum ATH_DEBUG { ATH DBG RESET

- -

ATH DBG QUEUE - -

ATH DBG EEPROM ATH DBG CALIBRATE

- -

ATH DBG INTERRUPT ATH DBG REGULATORY

- -

ATH DBG ANI ATH DBG XMIT ATH DBG BEACON

- -

ATH DBG CONFIG ATH DBG FATAL

- -

ATH DBG PS ATH DBG BTCOEX ATH DBG WMI

OxOOOOOOOl, Ox00000002, Ox00000004, Ox00000008,

= OxOOOOOOlO, = Ox00000020,

= Ox00000040, = Ox00000080,

Ox00000100, = Ox00000200, = Ox00000400, = Ox00000800, = OxOOOOlOOO,

= Ox00002000,

} ;

ATH DBG BSTUCK ATH DBG MCI

- -

ATH DBG DFS ATH DBG WOW

- -

ATH DBG ANY

= Ox00004000, Ox00008000, Ox00010000, Ox00020000, Oxf fffff ff

If you want to debug calibration (Ox00000008) and resets (Ox00000001) for example you would use (Ox00000008 I Ox00000001) = Ox00000009. To debug everything just use Oxffffffff. Below is an example of how to enable debug for just configuration changes:

modprobe ath9k debug=Ox00000200 (or) modprobe ath9k htc debug=Ox00000200

You can also use modprobe.d configuration files, for example to enable ATH_DBG_CONFIG (Ox00000200) and ATH_DBG_PS (Ox00000800) you would have a file /etc/modprobe.d/atheros.conf with this:

options ath9k debug=OxaOO (or) options ath9k_htc debug=OxaOO

Debugfs files To get debugfs you will need to mount it first. You can do so as follows:

mount -t debugfs debugfs /sys/kernel/debug/

Debugfs files for ath9k

ath9k has several debugfs files which you can query for information and some which allow you to insert data. This can be enabled as:

Device Drivers ---> [*] Network device support --->

Wireless LAN ---> Atheros Wireless Cards --->

[M] Atheros 802.lln wireless cards support [*] Atheros ath9k debugging

Once the config options are enabled and debugfs is mounted, these would be seen:

/sys/kernel/debug/ieee80211/phy0/ath9k/btcoex /sys/kernel/debug/ieee80211/phy0/ath9k/diversity /sys/kernel/debug/ieee80211/phy0/ath9k/gpio_val /sys/kernel/debug/ieee80211/phy0/ath9k/gpio_mask /sys/kernel/debug/ieee80211/phy0/ath9k/spectral_fft_perio d /sys/kernel/debug/ieee80211/phy0/ath9k/spectral_period /sys/kernel/debug/ieee80211/phy0/ath9k/spectral_count /sys/kernel/debug/ieee80211/phy0/ath9k/spectral short_rep eat /sys/kernel/debug/ieee80211/phy0/ath9k/spectral scan_ctl /sys/kernel/debug/ieee80211/phy0/ath9k/spectral scanO /sys/kernel/debug/ieee80211/phy0/ath9k/modal_eeprom /sys/kernel/debug/ieee80211/phy0/ath9k/base_eeprom /sys/kernel/debug/ieee80211/phy0/ath9k/dump_nfcal /sys/kernel/debug/ieee80211/phy0/ath9k/regdump /sys/kernel/debug/ieee80211/phy0/ath9k/ignore_extcca /sys/kernel/debug/ieee80211/phy0/ath9k/regval /sys/kernel/debug/ieee80211/phy0/ath9k/regidx /sys/kernel/debug/ieee80211/phy0/ath9k/paprd /sys/kernel/debug/ieee80211/phy0/ath9k/ani /sys/kernel/debug/ieee80211/phy0/ath9k/tx_chainmask /sys/kernel/debug/ieee80211/phy0/ath9k/rx_chainmask /sys/kernel/debug/ieee80211/phy0/ath9k/recv /sys/kernel/debug/ieee80211/phy0/ath9k/reset /sys/kernel/debug/ieee80211/phy0/ath9k/misc /sys/kernel/debug/ieee80211/phy0/ath9k/qlen_vo /sys/kernel/debug/ieee80211/phy0/ath9k/qlen_vi /sys/kernel/debug/ieee80211/phy0/ath9k/qlen_be /sys/kernel/debug/ieee80211/phy0/ath9k/qlen_bk /sys/kernel/debug/ieee80211/phy0/ath9k/queues /sys/kernel/debug/ieee80211/phy0/ath9k/xmit /sys/kernel/debug/ieee80211/phy0/ath9k/interrupt /sys/kernel/debug/ieee80211/phy0/ath9k/dma

Debugfs files for ath9k _ htc

ath9k_htc has a few debugfs files which show driver statistics. Enable it as:

I Device Drivers --->

[*] Network device support ---> Wireless LAN --->

Atheros Wireless Cards ---> [M] Atheros 802.lln wireless cards support [*] Atheros ath9k htc debugging

Once enabled, these are available:

/sys/kernel/debug/ieee80211/phyl/ath9k_htc/modal eeprom /sys/kernel/debug/ieee80211/phyl/ath9k_htc/base_eeprom /sys/kernel/debug/ieee80211/phyl/ath9k_htc/debug /sys/kernel/debug/ieee80211/phyl/ath9k_htc/queue /sys/kernel/debug/ieee80211/phyl/ath9k_htc/slot /sys/kernel/debug/ieee80211/phyl/ath9k_htc/recv /sys/kernel/debug/ieee80211/phyl/ath9k_htc/xmit /sys/kernel/debug/ieee80211/phyl/ath9k_htc/tgt_rx_stats /sys/kernel/debug/ieee80211/phyl/ath9k_htc/tgt_tx_stats /sys/kernel/debug/ieee80211/phyl/ath9k_htc/tgt_int stats