Looking for Kernel defconfig

[ndivecha]

Hello All,

I hope you are well.

I recently purchased an EDUP EP-AX1672 (chipset: Mediatek mt7921au), and I’m trying to enable it on my embedded Linux system to be used as an AP router.

So far, the system recognizes the device as follows:

root@localhost:~# [  189.475661] usb 1-1: new high-speed USB device number 3 using ci_hdrc
[  189.637318] usb 1-1: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
[  189.645525] usb 1-1: New USB device strings: Mfr=2, Product=3, SerialNumber=4
[  189.652676] usb 1-1: Product: Wireless_Device
[  189.657053] usb 1-1: Manufacturer: MediaTek Inc.
[  189.661698] usb 1-1: SerialNumber: 000000000
root@localhost:~# lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0e8d:7961 MediaTek Inc. Wireless_Device
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Here are the configurations I’ve enabled so far:

CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
CONFIG_USB_MON=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_OHCI_HCD=y
CONFIG_WLAN=y
CONFIG_WLAN_VENDOR_MEDIATEK=y
CONFIG_MT76_CORE=y
CONFIG_MT7921U=y
CONFIG_MT7921_COMMON=y
CONFIG_WIRELESS=y
CONFIG_WIRELESS_EXT=y
CONFIG_LIB80211=y
CONFIG_LIB80211_CRYPT_WEP=y
CONFIG_LIB80211_CRYPT_CCMP=y
CONFIG_LIB80211_CRYPT_TKIP=y
CONFIG_HOSTAP=y

However, I do not see any wlan0 or any other wireless interface.

Could anyone share a complete kernel defconfig that includes USB and MT7921au configuration? Your help would be greatly appreciated.

Note: I am running a Yocto Project-based embedded Linux system, so I need to create a defconfig to enable these features.

Thank you!

[ndivecha]

So I finally got my darn Wifi working after opening kitchen sink...

[  165.792990] usb 1-1: new high-speed USB device number 3 using ci_hdrc
[  165.954551] usb 1-1: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
[  165.962763] usb 1-1: New USB device strings: Mfr=2, Product=3, SerialNumber=4
[  165.969920] usb 1-1: Product: Wireless_Device
[  165.974303] usb 1-1: Manufacturer: MediaTek Inc.
[  165.978937] usb 1-1: SerialNumber: 000000000
[  166.132975] usb 1-1: reset high-speed USB device number 3 using ci_hdrc
[  166.333057] mt7921u 1-1:1.0: HW/SW Version: 0x8a108a10, Build Time: 20230117170855a
[  166.609922] mt7921u 1-1:1.0: WM Firmware Version: ____010000, Build Time: 20230117170942

I had to enable bunch of CONFIG_:

# Wireless configuration
CONFIG_WIRELESS=y
CONFIG_WIRELESS_EXT=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_WEXT_SPY=y
CONFIG_WEXT_PRIV=y
CONFIG_CFG80211=y
CONFIG_NL80211_TESTMODE=y
CONFIG_CFG80211_DEVELOPER_WARNINGS=y
CONFIG_CFG80211_REQUIRE_SIGNED_REGDB=y
CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=y
CONFIG_CFG80211_DEFAULT_PS=y
CONFIG_CFG80211_CRDA_SUPPORT=y
CONFIG_CFG80211_WEXT=y
CONFIG_LIB80211=y
CONFIG_LIB80211_CRYPT_WEP=y
CONFIG_LIB80211_CRYPT_CCMP=y
CONFIG_LIB80211_CRYPT_TKIP=y
CONFIG_LIB80211_DEBUG=y
CONFIG_MAC80211=y
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
CONFIG_WLAN_VENDOR_MEDIATEK=y
CONFIG_MT7601U=y
CONFIG_MT76x0U=y
CONFIG_MT76x2U=y
CONFIG_MT7663U=y
CONFIG_MT7663S=y
CONFIG_MT76_CORE=y
CONFIG_MT76_USB=y
CONFIG_MT7921S=y
CONFIG_MT7921U=y
CONFIG_MT7921_COMMON=y
CONFIG_MT792x_USB=y

Two issues came across:

1. Every time I reboot the device I have to unplug and plug back again. If I leave the USB connected I get following errors:

[    2.523754] mt7921u 1-1:1.0: Direct firmware load for mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin failed with error -2
[   10.717625] mt7921u 1-1:1.0: Message 00000010 (seq 4) timeout
[   10.725505] mt7921u 1-1:1.0: Failed to get patch semaphore
[   14.813572] mt7921u 1-1:1.0: Message 00000010 (seq 5) timeout
[   14.821557] mt7921u 1-1:1.0: Failed to get patch semaphore
[   18.909549] mt7921u 1-1:1.0: Message 00000010 (seq 6) timeout
[   18.925843] mt7921u 1-1:1.0: Failed to get patch semaphore
[   23.005492] mt7921u 1-1:1.0: Message 00000010 (seq 7) timeout
[   23.017466] mt7921u 1-1:1.0: Failed to get patch semaphore
[   27.101510] mt7921u 1-1:1.0: Message 00000010 (seq 8) timeout
[   27.107301] mt7921u 1-1:1.0: Failed to get patch semaphore
[   31.197469] mt7921u 1-1:1.0: Message 00000010 (seq 9) timeout
[   31.203252] mt7921u 1-1:1.0: Failed to get patch semaphore
[   35.293538] mt7921u 1-1:1.0: Message 00000010 (seq 10) timeout
[   35.299406] mt7921u 1-1:1.0: Failed to get patch semaphore
[   39.389467] mt7921u 1-1:1.0: Message 00000010 (seq 11) timeout
[   39.395359] mt7921u 1-1:1.0: Failed to get patch semaphore
[   40.294653] mt7921u 1-1:1.0: hardware init failed

any thoughts?

2. How can I change the mode? I want to change to AP mode since my plan is to use this embedded Linux box as my router.

Cheers,

[bjlockie]

Maybe shut down the AP as part of the computer reboot?

[ndivecha]

Maybe shut down the AP as part of the computer reboot?

hmm... let me look into it... So far on every reboot I have to unplug and plug back in... ran into some kernel panics also!.

[morrownr]

How can I change the mode? I want to change to AP mode since my plan is to use this embedded Linux box as my router.

What are you using for AP mode? hostapd? If so, hostapd will take the adapter into AP mode for you.

Here is a thought: Some others and I have been using the following repo to improve and upstream Realtek WiFi 5 rtw88 in-kernel drivers and I am at the beginning point of starting a similar repo for mt76. The mt76 repo I have created here is private for now and is what is in mt76 wireless-next for now. We are discussing things and starting a plan but if you want to join in on the effort, it might help all involved.

@morrownr

[ndivecha]

@morrownr

What are you using for AP mode? hostapd? If so, hostapd will take the adapter into AP mode for you.

Wasn't sure but I will look into hostapd. Need to enable the package in Yocto and configure it. I have DHCP server running with DNSMasq, so I guess all I have to do is to bridge my wlan0 with my wwan0.

Regarding mt76 repo, that is a great idea and sure I'm in...

Cheers,

[morrownr]

I will look into hostapd

Here is a link to my example hostapd.conf for WiFi 6, 5 GHz for your adapter:

https://github.com/morrownr/USB-WiFi/blob/main/home/AP_Mode/hostapd-WiFi6.conf

Near the top of the document is the url to the hostapd web site. If you need to compile it, that is the location.

Regarding mt76 repo, that is a great idea and sure I'm in...

I sent the invite so see you there.