Summit Software Stack for 60 Series

There are certain patch ranges within kernels 4.4 and 4.9 that need a modification so backports can build, the reason why we cannot fix it in backports is that we cannot track and differentiate between patch versions of the same 'major.minor' version of kernel. To fix this issue, move the function kobject_has_children from linux/kobject.h to drivers/base/core.c in your kernel source, rebuild the kernel and then rebuild backports.

In order to be able to leverage the Modular Approval of a wireless module the following requirements have to be met:

• The RF circuitry must be shielded
• The module must have buffered modulation/data inputs. Module must inherently ensure compliance under host fault (watch dog) conditions
• The module must have a regulated power supply
• An antenna needs to be attached permanently or a unique antenna connector must be mounted on the module
• The module must be compliant with the regulations in a stand-alone configuration
• The module must be labeled with its permanently affixed FCC ID label or use an electronic display
• A user manual needs to provide comprehensive instructions to explain compliance requirements.
• The module must comply with RF exposure requirements

It is best practice to include the source in your build system. If using Yocto, our external layer will do this for you.
Here is an example manually compiling using our SOM60 as a target in a Buildroot environment:

1. Download and extract the Sterling supplicant source.
2. Navigate to the "laird" directory.
3. Edit the config_laird file:
4. Find the following line, uncomment and change the path to your "openssl/include" directory:
   original line:
   #CFLAGS += -I/usr/local/openssl/include
   modified line:
   CFLAGS += -I/wb/buildroot/output/som60sd/build/host-libopenssl-1.1.1d/include
5. Run make with the following flags
   set:
CC="" for your cross-compile binary
PKG_CONFIG="" for your pkg-config binary
PKG_CONFIG_PATH="" for your pkgconfig directory
OBJCOPY="" for your objcopy binary

Note the following example is a single line command:
make CC="/wb/buildroot/output/som60sd/host/bin/arm-buildroot-linux-gnueabihf-gcc" PKG_CONFIG="/wb/buildroot/output/som60sd/host/bin/pkg-config" OBJCOPY="/wb/buildroot/output/som60sd/host/arm-buildroot-linux-gnueabihf/bin/objcopy" PKG_CONFIG_PATH="/wb/buildroot/output/som60sd/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/pkgconfig"

Using the test scripts provided with BlueZ to setup a GATT server:

cd /lib/bluez/test/
./example-gatt-server &

Power on Bluetooth, start advertising and set to pairable:

# bluetoothctl
Agent registered
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# advertise on
[bluetooth]# pairable on

Connect with Nordic's nRF smartphone app and read the fake battery level.

No, the ST60 SIPT module on the 2230C carrier board is strapped for 1.8 VIO operation only. Design for an embedded SDIO operation and does not allow 3.3 VIO even during card enumeration.

The LRU (Laird Regulatory Utility) and manufacturing firmware are used to exercise the 60 Series radios during certification testing. We do not publicly provide the LRU, however you can submit a ticket using our support portal and we will provide the pre-compiled binaries via a secure link. For more information regarding the use of the tool, please download the laird-sterling-60-docs-<ver>.tar.bz2 archive and read the vendor tools application note.

On Github where all software releases for the 60-series modules can be found 60 Releases amongst every release there is an archive called for example: "laird-sterling-60-docs-8.3.0.16.tar.bz2 In the archive there are technical documents like:

• app_note_60_antenna_adjust
• app_note_60_reset
• app_note_60_siso
• app_note_60_summit_awm
• app_note_60_summit_supplicant
• app_note_60_vendor
• app_note_60_wow
• sig_60_series_radio
• user_guide_60_dvk_su60_sipt
• user_guide_60_networkmanager

Most of them are very relevant for your development with the 60-series Wifi module.

We provide driver support via our fork of the backports package. Backports replaces the kernel-side Bluetooth stack and Wi-Fi stack including cfg80211, mac80211 and custom "lrdmwl" driver. We regularly perform a kernel rebase to keep up with LTS releases which provides the benefit of running a modern stack on a range of kernels. We perform build verification regression testing including popular silicon vendor kernels such as Xilinx, nVidia, ST Micro, TI and NXP. All releases are QA validated in our automated testing system.

We support our customers integrating backports in different Linux build environments including Yocto, Buildroot and PetaLinux. Please contact support if integration assistance is needed.

We provide custom "thinmac" firmware that not only includes optimizations and power tables but is designed to run on the 60 Series modules. Using firmware that is not provided by us will violate the modular certifications and may not work with our module.

Simply log into GitHub, go to the corresponding release packages page and click the "Watch" button (eye icon) in the top right of the page. Some radios (such as the LWB Series) requires you to download firmware separately from the product page; this firmware is updated on the product page in conjunction with GitHub releases.

Release Packages

To activate BT, list controller information and scan for BT/BLE devices:

# bluetoothctl
Agent registered
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# list
Controller C0:EE:40:50:00:00 summit [default]
[bluetooth]# scan on

To connect to a device acting as a peripheral:

[bluetooth]# scan on
Discovery started
[CHG] Controller C0:EE:40:50:00:00 Discovering: yes
[NEW] Device 4C:90:DE:92:00:00 Pixel XL
[CHG] Device 4C:90:DE:92:00:00 RSSI: -68
[CHG] Device 4C:90:DE:92:00:00 RSSI: -58
...
[NEW] Device 4C:90:DE:92:00:00 Pixel XL
[bluetooth]# scan off
Discovery stopped
[CHG] Controller C0:EE:40:50:00:00 Discovering: no
[CHG] Device 4C:90:DE:92:00:00 TxPower is nil
[CHG] Device 4C:90:DE:92:00:00 RSSI is nil
[bluetooth]# pair 4C:90:DE:92:00:00
Attempting to pair with 4C:90:DE:92:00:00
[CHG] Device 4C:90:DE:92:00:00 Connected: yes
[NEW] Primary Service
        /org/bluez/hci0/dev_4C_90_DE_92_00_00/service0001
        00001801-0000-1000-8000-00805f9b34fb
        Generic Attribute Profile
[NEW] Characteristic
        /org/bluez/hci0/dev_4C_90_DE_92_00_00/service0001/char0002
        00002a05-0000-1000-8000-00805f9b34fb
...
[NEW] Characteristic
        /org/bluez/hci0/dev_4C_90_DE_92_00_00/service003a/char003b
        00002a8a-0000-1000-8000-00805f9b34fb
        First Name
[NEW] Characteristic
        /org/bluez/hci0/dev_4C_90_DE_92_00_00/service003a/char003d
        00002a90-0000-1000-8000-00805f9b34fb
        Last Name
[NEW] Characteristic
        /org/bluez/hci0/dev_4C_90_DE_92_00_00/service003a/char003f
        00002a8c-0000-1000-8000-00805f9b34fb
        Gender
...
[CHG] Device 4C:90:DE:92:00:00 UUIDs: 0000181c-0000-1000-8000-00805f9b34fb
[CHG] Device 4C:90:DE:92:00:00 UUIDs: 0000aaa0-0000-1000-8000-aabbccddeeff
[CHG] Device 4C:90:DE:92:00:00 ServicesResolved: yes
Request confirmation
[agent] Confirm passkey 210165 (yes/no): yes
[Pixel XL]# trust 4C:90:DE:92:00:00
[CHG] Device 4C:90:DE:92:00:00 Trusted: yes
Changing 4C:90:DE:92:00:00 trust succeeded

The peripheral device is a Google Pixel XL running Android 10 using Nordic’s nRF app with an advertising profile setup with dummy information. If you pair with a device that does not have some kind of service running, it will disconnect, as BT/BLE has nothing to do.

For Sterling supplicant it is limited to only 1, for the Summit supplicant it is a total of 3.

More information comparing the Summit vs Sterling stack can be found in the Summit stack product brief:

We provide a sysfs entry for this purpose:

cat /sys/class/net/wlan0/device/lrd/info
Driver name : lrdmwl
Chip type   : 88W8997-PCIE
HW  version : 7
FW  version : 5.4.29.5
DRV version : 8.1.0.11
OTP version : 1
OTP num mac : 2
Radio Type  : ST
MAC address : c0:ee:40:50:00:00
Region code : 0xff (0xff)
Country code: '00' ('00')
TX antenna  : 2
RX antenna  : 2

Yes, the unused antenna port needs to be terminated with 50 Ohms.
Please also refer to the application note "app_note_60_siso" that can be found in the documentation archive on Github where you downloaded the Laird software for the module.

CVEs that have been addressed are referenced in our release notes. If there is a new CVE or one that is not listed in our release notes, please submit a ticket using our support portal and we will provide the status.

Radio-specific release notes can be found in the corresponding GitHub repo: https://github.com/LairdCP/Release-Packages

If the binary returns "not found" or does not work after confirming the executable bit is set with chmod +x <filename>, then you will need to create a symlink pointing to the system's interpreter. The file tool will show the expected interpreter and architecture of a binary, readelf is a lot more verbose and is used to discover the expected "sonames" of shared libraries. These utilities do not have to be used on the target system and is convenient to use on a common x86 Linux machine. These utilities can be installed on Ubuntu with sudo apt install binutils.

Example output from the file command:
sterling_supplicant-arm-7.0.0.139/usr/sbin$ file wpa_supplicant
wpa_supplicant: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.3, for GNU/Linux 3.0.0, stripped

Example output from the readelf command:
sterling_supplicant-arm-7.0.0.139/usr/sbin$ readelf -ld wpa_supplicant Elf file type is EXEC (Executable file)
Entry point 0xba28
There are 10 program headers, starting at offset 52 Program Headers:
...
<edited>
...
      [Requesting program interpreter: /lib/ld-linux.so.3]
...
<edited>
...
Dynamic section at offset 0x176ee8 contains 30 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [librt.so.1]
 0x00000001 (NEEDED)                     Shared library: [libnl-3.so.200]
 0x00000001 (NEEDED)                     Shared library: [libnl-genl-3.so.200]
 0x00000001 (NEEDED)                     Shared library: [libdl.so.2]
 0x00000001 (NEEDED)                     Shared library: [libdbus-1.so.3]
 0x00000001 (NEEDED)                     Shared library: [libgcc_s.so.1]
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]
...
<edited>
...

To use this binary, we will have to confirm this symlink exists or create a new symlink pointing to the interpreter on the target filesystem:
cd /lib/
ls -l ld-*
-rwxr-xr-x    1 root     root        158772 Dec  2  2019 /lib/ld-2.26.so
ln -sf ld-2.26.so ld-linux.so.3
ls -l ld-*
-rwxr-xr-x    1 root     root        158772 Dec  2  2019 /lib/ld-2.26.so
lrwxrwxrwx    1 root     root            10 Dec 21 18:55 /lib/ld-linux.so.3 -> ld-2.26.so

If the binary now reports that a library is not found when executed, repeat the steps shown above for creating a library symlink/soname pointing to it's real name. This may require you to use the find command to discover the location of the library. Example for libnl-genl-3:
find / -name 'libnl-genl-3*' -exec ls -l {} 2>/dev/null \;
-rwxr-xr-x    1 root     root         18524 Feb 14 23:42 /usr/lib/libnl-genl-3.so.200.26.0
cd /usr/lib/
ln -sf libnl-genl-3.so.200.26.0 libnl-genl-3.so.200
ls -l libnl-genl-3*
-rwxr-xr-x    1 root     root         18524 Feb 14 23:42 /usr/lib/libnl-genl-3.so.200.26.0
lrwxrwxrwx    1 root     root            24 Feb 14 23:37 /usr/lib/libnl-genl-3.so.200 -> libnl-genl-3.so.200.26.0

If the library does not exist, you will have to include that package in your build. For instance if the above example libnl was missing, include the libnl package when building your filesystem.

The iw tool can be used to read the status of the device:

# iw dev

phy#0
        Unnamed/non-netdev interface
                wdev 0x2
                addr 7e:4a:78:cc:85:77
                type P2P-device
                txpower 31.00 dBm
        Interface wlan0
                ifindex 7
                wdev 0x1
                addr aa:bb:cc:07:0c:b1
                ssid testAP
                type AP
                channel 11 (2462 MHz), width: 20 MHz, center1: 2462 MHz
                txpower 31.00 dBm

Managed/client mode link information:

# iw wlan0 link

Connected to aa:bb:cc:12:34:56 (on wlan0)
        SSID: testAP
        freq: 2462
        RX: 364 bytes (2 packets)
        TX: 3782 bytes (22 packets)
        signal: -31 dBm
        tx bitrate: 2.0 MBit/s
        bss flags:      short-slot-time
        dtim period:    2
        beacon int:     200

AP mode to read connected client information:

# iw wlan0 station dump

Station aa:bb:cc:8b:6c:fe (on wlan0)
        inactive time:  3000 ms
        rx bytes:       6479
        rx packets:     37
        tx bytes:       9706
        tx packets:     66
        tx failed:      0
        signal:         -44 [-44] dBm
        tx bitrate:     1.0 MBit/s
        rx bitrate:     65.0 MBit/s
        authorized:     yes
        authenticated:  yes
        associated:     yes
        WMM/WME:        yes
        TDLS peer:      no
        DTIM period:    2
        beacon interval:100
        short slot time:yes
        connected time: 20 seconds

You must load Summit firmware for multi-BSSID support. After loading the driver and firmware, perform the following: Stop all software that may be managing the Wi-Fi interface including the supplicant, NetworkManager, connman, hostapd, etc.

List out the current virtual interfaces on the physical interface (phy):

# iw dev
phy#0
        Interface wlan0
                ifindex 7
                wdev 0x1
                addr c0:ee:40:50:00:00
                type managed
                txpower 20.00 dBm

Delete the virtual interface:

# iw wlan0 del

Add up to 3 virtual interfaces onto the phy using unique names per dev (note there are two underscores in __ap):

# iw phy0 interface add ap0 type __ap
# iw phy0 interface add ap1 type __ap
# iw phy0 interface add ap2 type __ap

Confirm the virtual interfaces exist:

# iw dev
phy#0
        Interface ap2
                ifindex 10
                wdev 0x4
                addr c0:ee:40:50:00:02
                type AP
                txpower 20.00 dBm
        Interface ap1
                ifindex 9
                wdev 0x3
                addr c0:ee:40:50:00:01
                type AP
                txpower 20.00 dBm
        Interface ap0
                ifindex 8
                wdev 0x2
                addr c0:ee:40:50:00:00
                type AP
                txpower 20.00 dBm

The MAC on the first interface will not change and each subsequent interface added will add 1 to the first MAC.

In order to leverage our modular certifications, you must follow the RF design of the module associated with the chip/SIPT. Design files will be provided upon request so you can reproduce our design on your custom board. We highly suggest you to take advantage of our free design review to prevent any issues when going for certification testing.

Please submit a ticket using our support portal when you are ready to begin the process.

The country code is stored in one time programmable memory (OTP) on the 60 Series module. The default is worldwide mode. You can permanently change this in manufacturing using the LMU (Laird Manufacturing Utility). For access to this tool, please submit a ticket using our support portal and we can send you a link to the pre-compiled binaries. More information about using the tool, please download the laird-sterling-60-docs-<ver>.tar.bz2 archive and read the vendor tools application note available here.

For international use, we recommend leaving the 60 configured in the default static worldwide mode as this mode will not violate any of our modular certifications.

The 60 series in static WW mode:

• 2.4GHz band
  • Limited to channels 1-11 for both client and AP mode
• 5GHz band
  • Flagged for no-IR (no initiating radiation)
    • Initial passive scanning in client mode
    • Standalone AP mode will not be available
  • Restrictions are due to the lack of a radar detection engine used for master devices complying to DFS regulations and different DFS requirements per region
• Assumes you are going for EN 300 440 which allows the 60 to operate as an SRD on UNII-3 in the ETSI region
• Is limited to the lowest common denominator of transmit power levels per channel and channel set available of the currently supported modular certifications
  • This mode may only become more restricted; for instance we may add a new modular cert that introduces further restrictions

To use an antenna that is not listed on your wireless modules datasheet, it must be of the same topology (e.g. dipole, PIFA, etc.), equal or lesser gain, and have the same in-band and out of band characteristics.

Note: Japan (MIC) lists applicable antennas on its certificates. If your antenna is not on the approved list, regardless of whether it is comparative, it must be added to the certificate before it can be used in Japan.

The Sterling supplicant is based on the open-source wpa_supplicant and is also provided as an open-source package.

We update the source and patch as needed to make sure we are up to date on the latest CVEs.

It also goes through our QA validation process with each production release of backports and firmware. For more information, see the release notes on GitHub:

Open/unsecured Network:

network={
        ssid="myAP"
        key_mgmt=NONE
        scan_ssid=1
}

WPA2-PSK:

network={
        ssid="myAP"
        key_mgmt=WPA-PSK
        psk="password"
        pairwise=CCMP
        group=CCMP
        proto=RSN
        scan_ssid=1
}

WPA2-AES with EAP-TLS

network={
    scan_ssid=1
    ssid="myAP"
    pairwise=CCMP
    group=CCMP
    key_mgmt=WPA-EAP
    proto=RSN
    eap=TLS
    identity="user1"
    private_key="/etc/certs/user1.pem"
    private_key_passwd="user1"
    client_cert="/etc/certs/user1.pem"
}

WPA-TKIP with PEAP MSCHAPv2:

network={
    scan_ssid=1
    ssid="myAP"
    key_mgmt=WPA-EAP
    eap=PEAP
    identity="user1"
    phase1="peaplabel=auto peapver=0 "
    phase2="auth=MSCHAPV2"
    password="user1"
}

For the full documentation provided by the wpa_supplicant maintainers, please visit: https://w1.fi/cgit/hostap/plain/wpa_supplicant/wpa_supplicant.conf

Additional documentation can be located in the Sterling 60 GitHub repository