[BPI-R2] internal Wifi/BT (MT6625L) - Kernel

frank-w · October 12, 2019, 1:09pm

Back to topic…

Found out that huawei mediapad t3 also uses this chip,but did not yet found driver in source

https://consumer.huawei.com/en/opensource/detail/?siteCode=worldwide&productCode=Tablets&fileType=openSourceSoftware&pageSize=10&curPage=1

But it’s also android (7) where i guess it also uses kernel 3.18, driver package seems to be the BG2-W09, which is same driver…

LeXa2 · October 17, 2019, 12:45pm

So it means driver is also targeted at android so in best case scenario it will be the same thing we’ve got now on hands and more probable is that it won’t compile for linux at all as you mentioned that @garywang had modified/ported Android driver to linux 4.4/4.9 as a first step. Oh well, it might be a proper thing then to at least take sources we’ve got and patch them to be buildable as an out-of-tree module (the same way it is done in linux kernel backports thing). Building it as a module is in any case a hard requirement if we want it to work with openwrt - they do use out of tree 80211n stack from backports so to have this driver working in openwrt with stock openwrt kernel it needs to be a module linked with backports cfg80211n.

frank-w · October 17, 2019, 1:32pm

i also think that workung on (my) current codebase will be the best we can do and enable module building and tidy up. Here are you more expert.

I currently fighting with r64 uboot and emmc (but i think i found the problem…have to make some tests after patching mmc-driver)

spikerguy · October 17, 2019, 5:39pm

Can I use any pre-compile kernel from your git with a working wifi ? If so then which one? Also advice which branch should I use in case I want to compile it on my own with a working wifi and stable version? I plan to build a new image for Arch Linux this week.

Please advice. Thanks.

frank-w · October 17, 2019, 5:47pm

Precompiled only for 4.14 and 4.19. All others need to be compiled (-wifi branch)

if you want to try last wifi-enabled kernel: https://github.com/frank-w/BPI-R2-4.14/tree/5.4-wifi

spikerguy · October 17, 2019, 6:27pm

Thanks creating a PKGBUILD for this, Will try to compile kernel along with boot Will put it on my repo maybe so just updating the kernel from the repo can keep the OS updated

Thanks for your work.

LeXa2 · October 19, 2019, 2:55am

Frank, I spent some time toying with the driver code we’ve got on hands.
Please take a look at this PR:

frank-w · October 19, 2019, 4:10am

Thank you very much for your help.Does it now work as module?

LeXa2 · October 19, 2019, 10:41am

Well, it is mixed experience. I hadn’t hit any explicit driver bug/problem when running as module compared to running built-in. But it looks like there’re some kernel memory corruptions happening occasionally when running as a module which mainly manifest themselves as fake ext4 errors being detected causing root file system to be remounted read-only. Finding the cause for this one would be a nightmare I guess.

frank-w · October 19, 2019, 5:01pm

oh, thats bad…does it also happen when builtin after your modifications? any idea how to debug this?

this problem in my head i think it’s better to clean code a bit…have posted some other comments

frank-w · October 30, 2019, 7:31am

Please test current codebase because @LeXa2 did some fixes

mifvi · November 7, 2019, 6:43am

frank-w in kernel build bpi-r2_5.4.0-rc5-merged wat features are supported ?

frank-w · November 7, 2019, 6:50am

In merged-tree all feature-branches except second gmac (wifi,poweroff,hdmi) are merged, and of course all mainline-options from older lts.

frank-w · December 27, 2019, 8:07am

@LeXa2 i’ve got a report from @deadmeat that wifi driver hangs on kalHifAhbKalWakeLockTimeout after some time of usage

I guess here but did not found message printed.

github.com

frank-w/BPI-R2-4.14/blob/5.4-main/drivers/misc/mediatek/connectivity/wlan/gen2/os/linux/gl_kal.c#L779


	WMTHWVER_MT6620_E6 = 0x5,
	WMTHWVER_MT6620_MAX,
	WMTHWVER_INVALID = 0xff
} ENUM_WMTHWVER_TYPE_T, *P_ENUM_WMTHWVER_TYPE_T;
#endif


/*******************************************************************************
*                              F U N C T I O N S
********************************************************************************
*/
VOID kalHifAhbKalWakeLockTimeout(IN P_GLUE_INFO_T prGlueInfo)
{
	KAL_WAKE_LOCK_TIMEOUT(prGlueInfo->prAdapter, &(prGlueInfo->rAhbIsrWakeLock), (HZ / 10));	/* 100ms */
}


#if CFG_ENABLE_FW_DOWNLOAD


static struct file *filp;
static uid_t orgfsuid;
static gid_t orgfsgid;
static mm_segment_t orgfs;

Any idea why this happen?

DeadMeat · December 27, 2019, 11:41pm

It’s in Frank’s 5.4-wifi branch, w/o any patches, but with custom config.

Compiled with:

➜  ~ armv7a-hardfloat-linux-gnueabihf-gcc -v
Используются внутренние спецификации.
COLLECT_GCC=armv7a-hardfloat-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/armv7a-hardfloat-linux-gnueabihf/9.2.0/lto-wrapper
Целевая архитектура: armv7a-hardfloat-linux-gnueabihf
Параметры конфигурации: /mnt/disk/tmp/portage/cross-armv7a-hardfloat-linux-gnueabihf/gcc-9.2.0-r2/work/gcc-9.2.0/configure --host=x86_64-pc-linux-gnu --target=armv7a-hardfloat-linux-gnueabihf --build=x86_64-pc-linux-gnu --prefix=/usr --bindir=
/usr/x86_64-pc-linux-gnu/armv7a-hardfloat-linux-gnueabihf/gcc-bin/9.2.0 --includedir=/usr/lib/gcc/armv7a-hardfloat-linux-gnueabihf/9.2.0/include --datadir=/usr/share/gcc-data/armv7a-hardfloat-linux-gnueabihf/9.2.0 --mandir=/usr/share/gcc-data/
armv7a-hardfloat-linux-gnueabihf/9.2.0/man --infodir=/usr/share/gcc-data/armv7a-hardfloat-linux-gnueabihf/9.2.0/info --with-gxx-include-dir=/usr/lib/gcc/armv7a-hardfloat-linux-gnueabihf/9.2.0/include/g++-v9 --with-python-dir=/share/gcc-data/ar
mv7a-hardfloat-linux-gnueabihf/9.2.0/python --enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt --disable-werror --with-system-zlib --enable-nls --without-included-gettext --enable-checking=release --with-bugurl=https://bugs.
gentoo.org/ --with-pkgversion='Gentoo 9.2.0-r2 p3' --disable-esp --enable-libstdcxx-time --enable-poison-system-directories --with-sysroot=/usr/armv7a-hardfloat-linux-gnueabihf --disable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu --d
isable-multilib --disable-altivec --disable-fixed-point --with-float=hard --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --enable-libgomp --disable-libmudflap --disable-libssp --disable-systemtap --enable-vtable-verify --enable-lto
--without-isl --enable-default-pie --enable-default-ssp
Модель многопоточности: posix
gcc версия 9.2.0 (Gentoo 9.2.0-r2 p3)

P.S. 5.5-merged (build with same tools) has no any errors in dmesg, but does not work propertly, long story short - there is no outgoing traffic.

frank-w · December 28, 2019, 7:51am

5.4-wifi works but not 5.5-merged? I have only gcc 8.2 (ubuntu 18.4 has no gcc9)

Has 5.5 problems from.beginning or after some time?

DeadMeat · December 28, 2019, 8:47am

I didn’t really tested it in 5.4-wifi, my goal was to test vlans and bridges. But as i remember i wasn’t able to connect and use it, and dmesg was with lots of

kalHifAhbKalWakeLockTimeout

are there There is 5.4 dmesg: dmesg-5.4-wifi (162.4 КБ)

5.5: Right after boot it works, for now i found 3 states.

Everything works. 1-3 minutse after boot (wifi init).
Outgoing traffic disapears. Some times first partially (i.e. i can ping, but can’t connect via ssh), but then always fully. When client is connected i can tcpdump incoming traffic, but no outgoing. In case ou using bridge outgoing traffic is always present on bridge.
Unable to connect to ap. After about 10+ minutes after wifi init, may be depends on ap usage, but i’m not sure. And there are no message in dmesg about wifi.

frank-w · December 28, 2019, 10:07am

made only quick test directly after boot running my wifi.sh with -wifi kernels and then merging to main/merged. i have made no longtime test due to missing time.

something is wrong with download-link…i cannot download it

DeadMeat · December 28, 2019, 10:14am

Away from pc, will try to upload tommorow.

DeadMeat · December 29, 2019, 12:22am

2nd attempt: dmesg54 (162.0 КБ)