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Wi-Fi User Guide for Android 4.0-v42

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Wi-Fi User Guide for Android 4.0-v42 Wi-Fi User Guide for Android 4.0 i Revision History Date Version Description Author 2010/07/09 0.2 Initial revision of WLAN function 1. Driver version: 4.218.195.0 Terence Hsieh 2010/07/25 0.3 1. Refine the user guide ...

Wi-Fi User Guide for Android 4.0-v42
Wi-Fi User Guide for Android 4.0 i Revision History Date Version Description Author 2010/07/09 0.2 Initial revision of WLAN function 1. Driver version: 4.218.195.0 Terence Hsieh 2010/07/25 0.3 1. Refine the user guide 2. Add WLAN power saving mode Fred Chen 2010/08/18 0.6 Add SoftAP guide Terence Hsieh 2010/11/16 0.9 Add WLAN deepsleep mode Terence Hsieh 2011/01/07 1.0 1. Add auto channel selection of SoftAP 2. Add OOB (Out-Of-Band) mode Terence Hsieh 2011/01/08 1.2 Correct typo in OOB mode Fred Chen 2011/06/02 2.0 1. Add Wi-Fi Direct guide 2. Add 802.11 B/G/N configuration of SoftAP 3. Enable frameburst for SoftAP 4. Set dtim to 1 for SoftAP Terence Hsieh 2011/12/20 2.2 1. Driver version: 4.218.248.18 2. Update WLAN Operation Terence Hsieh 2012/02/10 3.0 Upgrade driver version: 5.90.125.120 Terence Hsieh 2012/08/20 3.1 1. Upgrade Wi-Fi driver version: 5.90.195.26.1 2. Modify WLAN OOB mode 3. Modify SoftAP function 4. Modify Wi-Fi Direct function 5. Remove WLAN deepsleep mode Terence Hsieh 2012/12/10 4.2 1. Remove WEXT from WLAN Terence Hsieh ii TABLE OF CONTENTS IINNTTRROODDUUCCTTIIOONN ............................................................................................................... 1 WWLLAANN SSOOFFTTWWAARREE AARRCCHHIITTEECCTTUURREE OOVVEERRVVIIEEWW ............................................................ 2 BROADCOM WLAN DONGLE BASIC CONCEPT ..................................................... 2 WLAN DONGLE OVERVIEW .................................................................................. 2 WWLLAANN SSOOFFTTWWAARREE PPAACCKKAAGGEE ........................................................................................ 3 AANNDDRROOIIDD CCOONNFFIIGGUURRAATTIIOONN FFOORR WWLLAANN FFUUNNCCTTIIOONN ....................................................... 4 ENABLE CFG80211 IN LINUX KERNEL ................................................................. 4 ENABLE WI-FI STATION FUNCTION IN ANDROID SOURCE ..................................... 4 WWLLAANN OOPPEERRAATTIIOONN ........................................................................................................ 6 INSTALL DONGLE HOST DRIVER ............................................................................ 6 ADD WPA SUPPLICANT CONFIGURATION FILE ...................................................... 6 INITIAL WPA SUPPLICATION ................................................................................... 7 SCAN NETWORK .................................................................................................... 8 WWLLAANN PPOOWWEERR SSAAVVIINNGG MMOODDEE ...................................................................................... 9 WWLLAANN OOOOBB ((OOUUTT--OOFF--BBAANNDD)) IINNTTEERRRRUU ppt 关于艾滋病ppt课件精益管理ppt下载地图下载ppt可编辑假如ppt教学课件下载triz基础知识ppt T MMOODDEE ...................................................... 10 MAKEFILE ............................................................................................................. 10 GPIO PIN DEFINE ............................................................................................... 10 SSOOFFTTAAPP FFUUNNCCTTIIOONNAALLIITTYY OOVVEERRVVIIEEWW .......................................................................... 11 SOFTAP FIRMWARE ............................................................................................. 12 ENABLE SOFTAP FUNCTION IN ANDROID SOURCE ............................................. 12 WWII--FFII DDIIRREECCTT FFUUNNCCTTIIOONNAALLIITTYY OOVVEERRVVIIEEWW .................................................................. 13 KERNEL CONFIGURATION ..................................................................................... 13 WI-FI DIRECT FIRMWARE .................................................................................... 13 ENABLE WI-FI DIRECT FUNCTION IN ANDROID SOURCE .................................... 13 WI-FI DIRECT OPERATION STEPS ....................................................................... 15 iii LIST OF FIGURES Figure 1: Broadcom SDIO WLAN Dongle Concept ............................................... 3 Figure 2: Connect to WLAM AP ................................................................................ 7 Figure 3: Scan WLAN network .................................................................................. 8 Figure 4: Enable Wi-Fi direct ................................................................................... 15 Figure 5: Scan p2p devices ..................................................................................... 15 Figure 6: Connect to p2p device ............................................................................. 16 Figure 7: Connected with p2p device ..................................................................... 16 iv LIST OF TABLE Table 1: SoftAP Features ......................................................................................... 11 1 IINNTTRROODDUUCCTTIIOONN This user guide is intended to give Ampak Wi-Fi module users a general guide of how to enable the WLAN in Android operating system. 2 WWLLAANN SSOOFFTTWWAARREE AARRCCHHIITTEECCTTUURREE OOVVEERRVVIIEEWW BROADCOM WLAN DONGLE BASIC CONCEPT The WLAN software package contains the dongle host driver for the host, a downloadable binary image for WLAN dongle, and management utilities. The wireless driver runs on the WLAN dongle. The SDIO host controller passes IEEE 802.3 packets, and the necessary control packets, back and forth over the SDIO bus. A special Broadcom Device Class protocol is used to encapsulate control packets on a separate logical control channel and to add packet information to the data channel. The advantage of using the dongle concept is that the wireless driver is executed externally from a host device, which means the host device does not have to use CPU or memory resources in order to execute the wireless driver’s functionality. The use of the dongle provides the following benefits to the host:  Power savings  A reduction in driver size and complexity  Processor offloading for activities such as checksum calculation and Address Resolution Protocol (ARP) execution WLAN DONGLE OVERVIEW The Dongle Host Driver (DHD) is the executable module that provides encapsulated communication between the host device and the Ampak module over the SDIO bus. The dongle software architecture is based on two major components:  Dongle Host Driver: A host-based driver used to provide a communication channel with the dongle device firmware.  User-space configuration utilities, WL and DHD: These executable binaries are called “wl” and “dhd” respectively. 3 Figure 1: Broadcom SDIO WLAN Dongle Concept WWLLAANN SSOOFFTTWWAARREE PPAACCKKAAGGEE The provided WLAN software package contains following files:  Dongle host driver (bcmdhd.ko)  Dongle device firmware (fw_bcmdhd.bin)  NVRAM (nvram.txt)  User space configuration utility (dhd and wl) 4 AANNDDRROOIIDD CCOONNFFIIGGUURRAATTIIOONN FFOORR WWLLAANN FFUUNNCCTTIIOONN ENABLE CFG80211 IN LINUX KERNEL Please add following items into your kernel configuration: CONFIG_CFG80211=y ENABLE WI-FI STATION FUNCTION IN ANDROID SOURCE 1. BoardConfig.mk # Wi-Fi related defines BOARD_WPA_SUPPLICANT_DRIVER := NL80211 WPA_SUPPLICANT_VERSION := VER_0_8_X BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_bcmdhd BOARD_HOSTAPD_DRIVER := NL80211 BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_bcmdhd BOARD_WLAN_DEVICE := bcmdhd WIFI_DRIVER_FW_PATH_PARAM := "/sys/module/bcmdhd/parameters/firmware_path" WIFI_DRIVER_FW_PATH_STA := "/system/etc/firmware/fw_bcmdhd.bin" WIFI_DRIVER_FW_PATH_P2P := "/system/etc/firmware/fw_bcmdhd_p2p.bin" WIFI_DRIVER_FW_PATH_AP := "/system/etc/firmware/fw_bcmdhd_apsta.bin" WIFI_DRIVER_MODULE_NAME := "bcmdhd" #WIFI_DRIVER_MODULE_PATH := "/system/lib/modules/bcmdhd.ko" WIFI_DRIVER_MODULE_ARG := "iface_name=wlan firmware_path=/system/etc/firmware/fw_bcmdhd.bin nvram_path=/system/etc/firmware/nvram.txt" 5 2. init.rc service wpa_supplicant /system/bin/wpa_supplicant \ -Dnl80211 -iwlan0 -puse_p2p_group_interface=1 -e/data/misc/wifi/entropy.bin # we will start as root and wpa_supplicant will switch to user wifi # after setting up the capabilities required for WEXT # user wifi # group wifi inet keystore class main socket wpa_wlan0 dgram 660 wifi wifi disabled oneshot 6 WWLLAANN OOPPEERRAATTIIOONN This is a quick example for connection and you can refer to the website of WPA Supplicant for more detail. INSTALL DONGLE HOST DRIVER # insmod bcmdhd.ko “firmware_path=fw_bcmdhd.bin nvram_path=nvram.txt iface_name=wlan” # ifconfig [Interface Name] up ADD WPA SUPPLICANT CONFIGURATION FILE Please create wpa_supplicant.conf file with following content: ctrl_interface=/data/misc/wifi/sockets # Open system without encryption network={ ssid="tttb" key_mgmt=NONE } # Open/Shared authentication with WEP encryption network={ ssid="tttb" key_mgmt=NONE auth_alg=OPEN SHARED wep_key0=1234567890 } # WPA/WPA2-PSK authentication with TKIP/AES encryption network={ ssid="tttb" psk="12345678" } 7 INITIAL WPA SUPPLICATION #wpa_supplicant -Dnl80211 -i [Interface Name] -c wpa_supplicant.conf -d& Figure 2: Connect to WLAM AP 8 SCAN NETWORK #wpa_cli -i [Interface Name] -p /data/misc/wifi/sockets/ scan #wpa_cli -i [Interface Name] -p /data/misc/wifi/sockets/ scan_results Figure 3: Scan WLAN network 9 WWLLAANN PPOOWWEERR SSAAVVIINNGG MMOODDEE There’re three different power saving mode settings as follows:  PM_OFF  The driver is not in Power Saving mode  Can be activated by following command ./wl PM 0  PM_MAX  The driver is in Maximum Power Saving mode. The driver always goes into Sleep mode and uses the PS_POLL mechanism to retrieve packets from the AP. Performance is sacrificed for maximum power savings.  Can be activated by following command ./wl PM 1  PM_FAST  Fast Power Saving mode. As long as there’re active data transfers, the driver does not go into Sleep mode. After data traffic stops, driver goes into Sleep mode. This allows for power savings in IDLE times, but provides full performance when needed.  Can be activated by following command ./wl PM 2 10 WWLLAANN OOOOBB ((OOUUTT--OOFF--BBAANNDD)) IINNTTEERRRRUUPPTT MMOODDEE Host can enter sleep mode, but keep Ampak module alive. Once Ampak module receives packets, it can wake up host through a pre-defined GPIO pin. MAKEFILE Please add follwing flags in Makefile of driver # DHDCFLAGS += -DSDIO_ISR_THREAD DHDCFLAGS += -DOOB_INTR_ONLY -DHW_OOB -DCUSTOMER_OOB GPIO PIN DEFINE Register a gpio for WL_HOST_WAKE and change this gpio to interrupt pin. dhd_customer_gpio.c: int dhd_customer_oob_irq_map(unsigned long *irq_flags_ptr) { int host_oob_irq = 0; #ifdef CUSTOMER_HW2 host_oob_irq = wifi_get_irq_number(irq_flags_ptr); #elif defined(CUSTOMER_OOB) printk("GPIO(WL_HOST_WAKE) = EXYNOS4_GPX0(7) = %d\n", EXYNOS4_GPX0(7)); host_oob_irq = gpio_to_irq(EXYNOS4_GPX0(7)); gpio_direction_input(EXYNOS4_GPX0(7)); printk("host_oob_irq: %d \r\n", host_oob_irq); #else… 11 SSOOFFTTAAPP FFUUNNCCTTIIOONNAALLIITTYY OOVVEERRVVIIEEWW Many smart phones have high-bandwidth cellular data connections using technologies such as HSPA, UMTS, EVDO, and so on. In addition to provide access to network-based services from the phone itself, many carriers want to enable their customers to use the connection for other WLAN-enabled devices, such as computers and handheld video games. For other devices to connect to the cellular phone, the WLAN chipset must be configured for SoftAP operation. Multiple WLAN-enabled devices can then connect to the cellular phone and share the connection. This capability is known as tethering. Several other protocols are required, however, before the WLAN-enabled devices can successfully share a connection with the cellular phone. These protocols include DHCP (for giving associated devices their own IP address) and Network Address Translation (NAT). There protocols are layer-3 protocols that exist entirely above Broadcom SoftAP implementation. Following table introduce the SoftAP features: Feature Description Stations supported 8 Station power save support IEEE and WMM-PS Security Open, WEP, WPA-PSK(TKIP), and WPA2-PSK(TKIP+AES) WEP keys supported 4 SSID broadcast disable Yes Allow/deny list Yes, through MAC address filtering Association station list Yes Limit station associations Yes, the maximum = 8 Table 1: SoftAP Features The vast majority of the functionality required to implement a SoftAP solution is implemented in the firmware that is executed by the on-chip processor. Consequently, the software and CPU load on the host is relatively small. 12 SOFTAP FIRMWARE If the target device requires SoftAP support, a firmware file with SoftAP support must be downloaded to the module. The firmware binary file must have an ap in the file name, such as fw_bcmdhd_apsta.bin. ENABLE SOFTAP FUNCTION IN ANDROID SOURCE 1. BoardConfig.mk # Wifi related defines BOARD_WPA_SUPPLICANT_DRIVER := NL80211 WPA_SUPPLICANT_VERSION := VER_0_8_X BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_bcmdhd BOARD_HOSTAPD_DRIVER := NL80211 BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_bcmdhd BOARD_WLAN_DEVICE := bcmdhd WIFI_DRIVER_FW_PATH_PARAM := "/sys/module/bcmdhd/parameters/firmware_path" WIFI_DRIVER_FW_PATH_STA := "/system/etc/firmware/fw_bcmdhd.bin" WIFI_DRIVER_FW_PATH_P2P := "/system/etc/firmware/fw_bcmdhd_p2p.bin" WIFI_DRIVER_FW_PATH_AP := "/system/etc/firmware/fw_bcmdhd_apsta.bin" WIFI_DRIVER_MODULE_NAME := "bcmdhd" #WIFI_DRIVER_MODULE_PATH := "/system/lib/modules/bcmdhd.ko" WIFI_DRIVER_MODULE_ARG := "iface_name=wlan firmware_path=/system/etc/firmware/fw_bcmdhd.bin nvram_path=/system/etc/firmware/nvram.txt" 13 WWII--FFII DDIIRREECCTT FFUUNNCCTTIIOONNAALLIITTYY OOVVEERRVVIIEEWW KERNEL CONFIGURATION Please add following items into your kernel configuration: CFG80211=y WI-FI DIRECT FIRMWARE If the target device requires Wi-Fi Direct support, a firmware file with P2P support must be downloaded to the module. The firmware binary file must have an p2p in the file name, such as fw_bcmdhd_p2p.bin. ENABLE WI-FI DIRECT FUNCTION IN ANDROID SOURCE 1. BoardConfig.mk # Wifi related defines BOARD_WPA_SUPPLICANT_DRIVER := NL80211 WPA_SUPPLICANT_VERSION := VER_0_8_X BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_bcmdhd BOARD_HOSTAPD_DRIVER := NL80211 BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_bcmdhd BOARD_WLAN_DEVICE := bcmdhd WIFI_DRIVER_FW_PATH_PARAM := "/sys/module/bcmdhd/parameters/firmware_path" WIFI_DRIVER_FW_PATH_STA := "/system/etc/firmware/fw_bcmdhd.bin" WIFI_DRIVER_FW_PATH_P2P := "/system/etc/firmware/fw_bcmdhd_p2p.bin" WIFI_DRIVER_FW_PATH_AP := "/system/etc/firmware/fw_bcmdhd_apsta.bin" WIFI_DRIVER_MODULE_NAME := "bcmdhd" #WIFI_DRIVER_MODULE_PATH := "/system/lib/modules/bcmdhd.ko" WIFI_DRIVER_MODULE_ARG := "iface_name=wlan firmware_path=/system/etc/firmware/fw_bcmdhd.bin nvram_path=/system/etc/firmware/nvram.txt" 14 2. device.mk PRODUCT_COPY_FILES += \ … frameworks/base/data/etc/android.hardware.wifi.direct.xml:system/etc/permissions/android. hardware.wifi.direct.xml \ … 3. WirelessSettings.java if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI_DIRECT)) { getPreferenceScreen().removePreference(wifiP2p); } else { mWifiP2pEnabler = new WifiP2pEnabler(activity, wifiP2p); } // getPreferenceScreen().removePreference(findPreference(KEY_WIFI_P2P_SETTINGS)); 4. init.rc service wpa_supplicant /system/bin/wpa_supplicant \ -Dnl80211 -iwlan0 -puse_p2p_group_interface=1 -e/data/misc/wifi/entropy.bin # we will start as root and wpa_supplicant will switch to user wifi # after setting up the capabilities required for WEXT # user wifi # group wifi inet keystore class main socket wpa_wlan0 dgram 660 wifi wifi disabled oneshot 15 WI-FI DIRECT OPERATION STEPS 1. Enable Wi-Fi direct Figure 4: Enable Wi-Fi direct 2. Enter to Wi-Fi direct page then you will see the scan results of P2P devices Figure 5: Scan p2p devices 16 3. Click the P2P device which you want to connect to and click “Connect” to connect the P2P device. Figure 6: Connect to p2p device 4. In sevaral time later, you will find the “Connected” string as following page after both P2P devices connected with each other. Figure 7: Connected with p2p device
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