[[PageOutline]] = Laird Sterling-LWB 2.4GHz Wifi / Bluetooth module (450-0148) The Laird Connectivity Sterling-LWB 450-0148 is a IEEE 802.11 b/g/n !WiFi radio with BT 2.1+EDR and BLE 4.2 connectivity module with a single external U.FL antenna port. == Module Details The Sterling-LWB 450-0148 module: * BCM43430 - for SDIO based !WiFi * 1x U.FL antenna shared between !WiFi and Bluetooth * WL_REG_ON pin must be driven high to enable !WiFi functionality * BT_REG_ON pin must be driven high to enable Bluetooth functionality * UART bus provides Bluetooth * SDIO bus provides !WiFi References: * [http://dev.gateworks.com/datasheets/sterling-lwb.pdf Datasheet] * https://www.lairdconnect.com/wireless-modules/wifi-modules-bluetooth/sterling-lwb == Board Specific Details * GW5910 * WL_REG_ON - PAD_GPIO_5__GPIO1_IO05 - driven high by reg_wl in Kernel to enable !WiFi functionality * BT_REG_ON - PAD_GPIO_2__GPIO1_IO02 - driven high by reg_bt in Kernel to enable Bluetooth functionality * UART4 (/dev/ttymxc3) is the Bluetooth UART * SDHC2 (/dev/mmcblk0) is the SDIO !WiFi bus (Note that the microSD is on SDHC3 thus appears to the kernel as /dev/mmcblk1 - this must be taken into account if mounting the root filesystem from microSD) == Firmware Firmware is needed for device functionality and it is loaded by the drivers. Several files are needed and depend on your regulatory domain: {{{#!bash apt install unzip wget http://dev.gateworks.com/images/firmware/sterling-lwb/480-0079.zip unzip 480-0079.zip unzip 480-0079-6.0.0.121.zip tar xvf 480-0079.tar.bz2 mkdir -p /lib/firmware/brcm cp -ra lib/firmware/brcm/* /lib/firmware/brcm }}} - 480-0079.zip - FCC firmware: - 480-0080.zip - ETSI firmware - 480-0116.zip - Giteki firmware == Drivers === !WiFi ==== Mainline kernel The SDIO !WiFi functionality is supported by the mainline {{{brcmfmac}}} (Full MAC) driveri n Linux 4.1+ kernel drivers: - CONFIG_CFG80211 / CONFIG_WLAN / CONFIG_NETDEVICES / CONFIG_WLAN_VENDOR_BROADCOM - CONFIG_BRCMUTIL (brcmutil.ko) (selected when you enable BRCMFMAC) - CONFIG_BRCMFMAC (brcmfmac.ko) - CONFIG_BRCMFMAC_SDIO=y (static; selects BRCMFMAC_PROTO_BCDC and FW_LOADER) On the Gateworks 4.20 kernel these are all enabled and you see the following: {{{#!bash root@bionic-armhf:~# dmesg | grep mmc0 [ 9.146576] mmc0: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA [ 9.184003] mmc0: queuing unknown CIS tuple 0x80 (2 bytes) [ 9.191715] mmc0: queuing unknown CIS tuple 0x80 (3 bytes) [ 9.199259] mmc0: queuing unknown CIS tuple 0x80 (3 bytes) [ 9.216072] mmc0: queuing unknown CIS tuple 0x80 (7 bytes) [ 9.345290] mmc0: new high speed SDIO card at address 0001 root@bionic-armhf:~# dmesg | grep brcm root@bionic-armhf:~# dmesg | grep brcm [ 16.537056] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1 [ 16.546999] usbcore: registered new interface driver brcmfmac [ 16.717595] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1 [ 16.742359] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43430/1 wl0: Sep 11 2018 09:22:09 version 7.45.98.65 (r707797 CY) FWID 01-b54727f }}} ==== LSR out-of-tree Linux backports driver LSR has driver downloads in the form of linux backports as well as firmware binaries on the [https://www.lsr.com/embedded-wireless-modules/wifi-plus-bluetooth-module/sterling-lwb#product-software Product Page] They have a linux backports driver with source tarballs on their site. I'm not clear what kernels it supports but it appears that 930-0075.zip which I used here supports up to 4.14. It appears they have a github account with more up-to-date driver backport releases: - https://github.com/LairdCP/Sterling-60-Release-Packages/releases Building out-of-tree LAIRD Linux backports !WiFi drivers (930-0075.zip): {{{#!bash wget http://dev.gateworks.com/images/firmware/sterling-lwb/930-0075.zip unzip 930-0075.zip tar xvf backports-laird-6.0.0.121.tar.bz2 cd laird-backport-6.0.0.121/ export CROSS_COMPILE= export KLIB_BUILD= export ARCH="arm" #make defconfig-lwb-etsi # config for ETSI #make defconfig-lwb-jp # config for Giteki make defconfig-lwb-fcc # conifg for FCC make }}} - results in brcmfmac.ko brcmutil.ko cfg80211.ko - these likely only work when used with a kernel that has support for brcmfmac disabled === Bluetooth You will need the {{{brcm_patchram_plus}}} utility to load a firmware at runtime. Building: * Ubuntu (on target): {{{#!bash wget https://github.com/LairdCP/brcm_patchram/archive/brcm_patchram_plus_1.1.tar.gz tar xvf brcm_patchram_plus_1.1.tar.gz cd brcm_patchram-brcm_patchram_plus_1.1 apt install build-essential libbluetooth-dev # add '#include ' and '#include ' to the top of the two c files make cp brcm_patchram_plus brcm_patchram_plus_usb /usr/local/bin cd .. }}} * !OpenWrt (cross-compile on host): {{{#!bash # setup OpenWrt toolchain env TOOLCHAIN_DIR=/opt/openwrt/16.02-imx6 TOOLCHAIN=toolchain-arm_cortex-a9+neon_gcc-5.2.0_musl-1.1.12_eabi PATH=$PATH:$TOOLCHAIN_DIR/$TOOLCHAIN/bin export STAGING_DIR=$TOOLCHAIN_DIR arm-openwrt-linux-gcc -I$TOOLCHAIN_DIR/$TOOLCHAIN/ brcm_patchram_plus.c -o brcm_patchram_plus }}} Bringing up Bluetooth: {{{#!bash # load firmware brcm_patchram_plus -d \ --patchram lib/firmware/brcm/4343w.hcd \ --enable_hci --no2bytes --tosleep 1000 /dev/ttymxc3 & # hci should now be there hciconfig # bring up interface hciconfig hci0 up # scan hcitool scan # ping l2ping -c 3 }}} == OS Support The following notes pertain to support in various OS BSPs (Note that in all cases firmware and drivers are needed as noted above): * Ubuntu with Gateworks 4.20 kernel (should also work in mainline kernel): - BT HCI: works - SDIO !WiFi: client mode works, AP untested * !OpenWrt master (Linux 4.19) - BT HCI: works - SDIO !WiFi: works * !OpenWrt 16.02 (Linux 4.4) - BT HCI: works (need provide cross-compiled brcm_patchram_plus) - SDIO !WiFi: **does not work - brcmfmac from this kernel will crash**