How to add WiFi support

["Sean Liming" <sean.liming@annabooks.com>]

[-- Attachment #1: Type: text/plain, Size: 2353 bytes --]

I have searched and spotted different discussion on adding wireless support
but have not found a solution. I have a Intel Centrino Wireless-N 1000 card
plugged into a Intel Atom N2800 (Cedar Trail) platform. I am using Yocto
Project 1.3.1, Cedar Trail BSP, core-image-x11

BB_VERSION        = "1.16.0"
TARGET_ARCH       = "i586"
TARGET_OS         = "linux"
MACHINE           = "cedartrail-nopvr"
DISTRO            = "poky"
DISTRO_VERSION    = "1.3.1"
TUNE_FEATURES     = "m32 core2"
Core-image-x11

Following the instructions to use menuconfig and create configuration
fragment, I have enabled the various kernel options to include the iwlagn
driver. The configuration fragment called mydiff.cfg (attached) was placed
in the meta-intel/meta-cedartrail/recipes-kernel/Linux/files folder. The
Linux-yocto_3.0.bbappend was modified with the following:

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
SRC_URI += "file://mydiff.cfg"

After building the image, ifconfig didn't show wireless and neither does
iwconfig. The adapter is found when I do a lspci. The kernel wireless
website - http://wireless.kernel.org/en/users/Drivers/iwlwifi  lists a
firmware package needed for installation. I tried to create a recipe to
place the firmware file in the /lib/firmware folder, but it doesn't get put
in. The lack of what to do for the LICENSE might be a problem. Here is the
recipe:

DESCRIPTION = "Intel WiFi 1000 Adapter"
LICENSE = "GPL"-?????
LIC_FILES_CHKSUM =
"file://${WORKDIR}/LICENSE.iwlwifi-1000-ucode;md5=aa2bfb02c7e0712680334b9f47
f8dc61"

SRC_URI = "file://LICENSE.iwlwifi-1000-ucode \
	   file://iwlwifi-1000-3.ucode \ 
	   "
FWPATH = "lib/firmware"
do_install_apped() {
	install -m 0644 LICENSE.iwlwifi-1000-ucode ${D}${FWPATH}
	install -m 0644 iwlwifi-1000-3.ucode ${D}${FWPATH}
}

I manually created the /lib/firmware folder and copied the firmware file
(iwlwifi-1000-3.ucode) to the folder. Nothing changed after a reboot. I also
tried a Intel Centrino Ultimate-N 6300 same result.

1. Was a kernel modification the right direction to enable support for this
driver?
2. Did I miss anything with regards to the configuration fragment setup?
3. Is the firmware really needed? If so why is there no /lib/firmware folder
and what should be used for the LICENSE ?


Regards,

Sean Liming


[-- Attachment #2: mydiff.cfg --]
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++ .confignew	2013-07-03 14:56:58.000000000 -0700
# CONFIG_NETFILTER_XT_TARGET_LED is not set
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_CFG80211=y
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
# CONFIG_CFG80211_REG_DEBUG is not set
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
# CONFIG_CFG80211_INTERNAL_REGDB is not set
CONFIG_CFG80211_WEXT=y
CONFIG_WIRELESS_EXT_SYSFS=y
CONFIG_MAC80211=y
CONFIG_MAC80211_HAS_RC=y
# CONFIG_MAC80211_RC_PID is not set
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_MINSTREL_HT=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
# CONFIG_MAC80211_MESH is not set
CONFIG_MAC80211_LEDS=y
# CONFIG_MAC80211_DEBUGFS is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_AT76C50X_USB is not set
# CONFIG_USB_NET_RNDIS_WLAN is not set
# CONFIG_RTL8180 is not set
# CONFIG_RTL8187 is not set
# CONFIG_ADM8211 is not set
# CONFIG_MAC80211_HWSIM is not set
# CONFIG_MWL8K is not set
# CONFIG_ATH_COMMON is not set
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
CONFIG_IWLAGN=y

#
# Debugging Options
#
# CONFIG_IWLWIFI_DEBUG is not set
# CONFIG_IWLWIFI_DEVICE_TRACING is not set
# CONFIG_IWLWIFI_DEVICE_SVTOOL is not set
# CONFIG_IWL_P2P is not set
# CONFIG_IWL4965 is not set
# CONFIG_IWL3945 is not set
# CONFIG_IWM is not set
# CONFIG_LIBERTAS is not set
# CONFIG_HERMES is not set
# CONFIG_P54_COMMON is not set
# CONFIG_RT2X00 is not set
# CONFIG_RTL8192CE is not set
# CONFIG_RTL8192SE is not set
# CONFIG_RTL8192CU is not set
# CONFIG_WL1251 is not set
# CONFIG_WL12XX_MENU is not set
# CONFIG_ZD1211RW is not set
# CONFIG_MWIFIEX is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_ALIX2 is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_INTEL_SS4200 is not set
CONFIG_LEDS_TRIGGERS=y

#
# LED Triggers
#
# CONFIG_LEDS_TRIGGER_TIMER is not set
# CONFIG_LEDS_TRIGGER_HEARTBEAT is not set
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set

#
# iptables trigger is under Netfilter config (LED target)
#
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_ARC4=y
CONFIG_AVERAGE=y