Unknown user в 08:15, 15 октября 2014

2014-10-15T08:15:10Z

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=Use rt3070 usb wifi module with rt2x00 kernel drivers in Android os=

==Prerequisites==

* Linux kernel working with your device in [http://www.tech-yard.com/tag/android/ android]
** For example android start on device and everything work but rt3070 wifi
* Ralink firmware binary
** Maybe it is possible to override use of binary firmware

==Android device setup==

* Place firmware binary to some folder of device tree
** For example device/toshiba/paz00-common/prebuild/firmware/rt2870.bin

* Copy firmware in board makefile
** For example your device make file is ac100.mk, put this line into it
<pre>
PRODUCT_COPY_FILES += device/toshiba/paz00-common/prebuild/firmware/rt2870.bin:system/vendor/firmware/rt2870.bin
</pre>

syntax is copy_variable += binary_source_path:binary_destination_path

* Add wifi section in BoardConfig.mk
** My section is pretty complex but will give a clue
<pre>
# Wifi related defines
USES_TI_MAC80211 := false
USES_BCMHD_NL80211 := true

ifdef USES_TI_MAC80211
BOARD_WPA_SUPPLICANT_DRIVER := NL80211
WPA_SUPPLICANT_VERSION := VER_0_8_X
BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_wl12xx
BOARD_HOSTAPD_DRIVER := NL80211
BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_wl12xx
BOARD_SOFTAP_DEVICE := wlan0
COMMON_GLOBAL_CFLAGS += -DUSES_TI_MAC80211
endif

ifdef USES_BCMHD_NL80211
BOARD_WPA_SUPPLICANT_DRIVER := WEXT
WPA_SUPPLICANT_VERSION := VER_0_8_X
BOARD_WPA_SUPPLICANT_PRIVATE_LIB := private_lib_driver_cmd
BOARD_HOSTAPD_DRIVER := WEXT
BOARD_HOSTAPD_PRIVATE_LIB := private_lib_driver_cmd
# Unknow option
#BOARD_LEGACY_NL80211_STA_EVENTS := true
endif

# Wifi base
BOARD_WLAN_DEVICE := wlan0
WIFI_DRIVER_MODULE_NAME := "rt2800usb"
WIFI_DRIVER_MODULE_PATH := "/system/lib/modules/rt2800usb.ko"
WIFI_DRIVER_MODULE_ARG := "nohwcrypt=1"
WIFI_DRIVER_FW_PATH_STA := "/system/vendor/firmware/rt2870.bin"
WIFI_DRIVER_FW_PATH_P2P := "/system/vendor/firmware/rt2870.bin"
WIFI_DRIVER_FW_PATH_AP := "/system/vendor/firmware/rt2870.bin"
WIFI_FIRMWARE_LOADER := ""
</pre>

As im trying to use ti mac80211 private or broadcom bcmhd i made section for both of them

* Add wpa_supplicant section to board init file
** For example your board init file is init.paz00.rc then add this sections
<pre>
service wpa_supplicant /system/bin/wpa_supplicant \
-Dwext -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf -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

service p2p_supplicant /system/bin/wpa_supplicant \
-Dwext -iwlan0 -puse_p2p_group_interface=1 -c/data/misc/wifi/wpa_supplicant.conf
# 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_eth0 dgram 660 wifi wifi
disabled
oneshot

service hostapd /system/bin/hostapd /data/misc/wifi/hostapd.conf
socket wpa_wlan0 dgram 660 wifi wifi
class main
oneshot
disabled

service dhcpcd_wlan0 /system/bin/dhcpcd -ABKL
class main
disabled
oneshot

service iprenew_wlan0 /system/bin/dhcpcd -n
class main
disabled
oneshot
</pre>

*** For TI private lib replace -Dwext with -Dnl80211

* Find usable wpa_supplicant private lib
** As of starting from Android 4.x aka ICS it use new wpa_supplicant fork from Broadcom, you need separate lib
to make your device work with wpa_supplicant
*** Perfect way is to know all the driver kitchen and to write own lib fully compatible with device driver
*** I fount that TI wl12x and Broadcom BCMHD private libs works somehow with rt3070 usb device, both need
small patches to compile but nothing serious
**** Place private lib to device tree

==Status==

* For with kernel 3.1 all this is working but not perfect (lower connect distance, sporadic reconnects)
** Dunno who exacly in charge rt2x00 kernel driver or android wpa_supplicant fork, i prefer to think its wpa_supplicant
as in linux with same kernel and hardware people have much less problems

Android rt3070 or rt2x00 - История изменений

Unknown user в 08:15, 15 октября 2014