Wl12xx driver

The wl12xx driver is used by the Wifi / BT chip present on the APF6Dev board. Before using the wifi, you have to calibrate the chip. This page details how to do it.

Installation

Linux

• Be sure to have CONFIG_NL80211_TESTMODE enabled.

Networking support --->
 Wireless --->
  <*> cfg80211 - wireless configuration API
   [*] nl80211 testmode command

Buildroot

• You need the calibrator tool from the ti-utils package.

Target package --->
 Hardware handling --->
  [*] ti-utils

Calibration

• Use the calibrator tool to generate the new calibration data. This will generate a file called new-nvs.bin.

# calibrator set ref_nvs /usr/share/ti-utils/ini_files/127x/TQS_S_2.6.ini

• Copy the file to the right place.

# cp new-nvs.bin /lib/firmware/ti-connectivity/wl1271-nvs.bin

• Load the wl12xx driver.

# modprobe wl12xx
# modprobe wlcore_sdio
wlcore: loaded

• Calibrate the chip.

# calibrator plt calibrate dual
wlcore: power up
wlcore: firmware booted in PLT mode PLT_ON (PLT 6.3.10.0.133)
wlcore: testmode cmd: radio status=0

The path to NVS file not provided, use default (/lib/firmware/ti-connectivity/wl1271-nvs.bin)
wlcore: power down

• Unload the driver

# rmmod wlcore_sdio

• Reset the chip. (or reboot the board)

# echo 40 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio40/direction
mmc0: card 0001 removed
# echo 1 > /sys/class/gpio/gpio40/value
sdhci-esdhc-imx 2190000.usdhc: card claims to support voltages below defined range
mmc0: queuing unknown CIS tuple 0x91 (3 bytes)
mmc0: new SDIO card at address 0001

• Set a MAC address.

# calibrator set nvs_mac /lib/firmware/ti-connectivity/wl1271-nvs.bin 00:1E:AC:00:51:22

• Load the driver.

# modprobe wlcore_sdio

• Power up the wireless interface.

# ifconfig wlan0 up
wlcore: firmware booted (Rev 6.3.10.0.133)
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

Congratulations ! Your chip is calibrated. :)

Going further

• Now you can use the general instructions here to setup your WiFi network.

Links

http://wireless.kernel.org/en/users/Drivers/wl12xx/calibrator

http://processors.wiki.ti.com/index.php/WL12xx_NLCP_Calibration_Process