META: Get Wi-Fi to work on wcn399x (ICNSS) devices (such as Redmi Note 7)
While porting Halium 9 to Redmi Note 7, I found out that I can get Wi-Fi to work by launching /vendor/bin/cnss-daemon.
Everything works fine after that, but since we want Wi-Fi to work WITHOUT Halium, I wonder how can we do that?
Interesting sources:
- https://github.com/ubports-lavender/kernel/blob/10/drivers/soc/qcom/icnss.c
- https://github.com/ubports-lavender/kernel/blob/10/drivers/soc/qcom/wlan_firmware_service_v01.c
- https://github.com/ubports-lavender/kernel/blob/10/drivers/soc/qcom/wlan_firmware_service_v01.h
NotKit assumed that this was done with IOCTLs, and I cannot run strace on cnss-daemon, all it does is returning restart_syscall..
Activity
assumed that this was done with IOCTLs
wrong :) though maybe QMI commands are sent using some ioctl, but this is not the point..
By Alexey Min on 2020-03-16T17:56:36
Edited by Administrator-
I think the soultion could be to reimplement what cnss-daemon does (create qmi service, send some commands to driver) The format of those commands is documented in the files you linked above (like wlan_firmware_service_v01). I think I already posted all my thoughts about this somewhere in #main? or was is #postmarketos-in-russisan.. anyway, take a look at the receiver event loop in function icnss_driver_event_work. You need to emulate all those qmi events/messages in some sequence (put debug prints there in downstream kernel and record the sequence) and then reproduce it. I used existing debugfs file for that, added one extra command that it accepts (see this commit temp wlan debug ). I made one very silly mistake there, fix it and probably wifi will already work. Or think of something else more clever, I dunno...
By Alexey Min on 2020-05-05T11:22:36
Edited by Administrator added category::device discussion labels
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That approach is not totally correct, this is the correct one: https://github.com/jhugo/linux/blob/5.5rc2_wifi/README
I'll "save" that README here
This is for mainline kernel driver!
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- Clone, build, install https://github.com/andersson/qrtr ;
sudo systemctl enable qrtr-ns.service apt-get install libudev-dev- Clone, build, install https://github.com/andersson/rmtfs ;
sudo systemctl enable rmtfs.service - Clone, build, install https://github.com/andersson/pd-mapper ;
sudo systemctl enable pd-mapper.service - Clone, build, install https://github.com/andersson/tqftpserv ;
sudo systemctl enable tqftpserv.service - Copy
FileRepository\qcsubsys8998.inf_arm64_09c39c1cc604f5ac\WLANMDSP.MBNto the same directory the modem fw lives (ie/lib/firmware/qcom/LENOVO/81F1) aswlanmdsp.mbn -
mkdir bdf(just need to exist temporary) - Copy
FileRepository\qcsubsys8998.inf_arm64_09c39c1cc604f5ac\bdwlan*tobdf/ - Run script [1] - twice since it exits after clone
- Create
/lib/firmware/ath10k/WCN3990/hw1.0directory - Copy
board-2.binscript output to/lib/firmware/ath10k/WCN3990/hw1.0 - Download
firmware-5.binfrom https://github.com/kvalo/ath10k-firmware/tree/master/WCN3990/hw1.0/HL2.0/WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1 to/lib/firmware/ath10k/WCN3990/hw1.0 - Enable
"single-chan-info-per-channel"to suppresss"chan info event"warning withqca-swiss-army-knife/tools/scripts/ath10k/ath10k-fwencoder --modify --features=wowlan,mgmt-tx-by-ref,non-bmi,single-chan-info-per-channel firmware-5.bin
[1]
#!/bin/bash if [ \! -d qca-swiss-army-knife ]; then git clone https://github.com/qca/qca-swiss-army-knife.git exit 0 fi JSON="bdf/board-2.json" iter=0 echo "[" > "${JSON}" for file in bdf/bdwlan.*; do [[ $file == *.txt ]] && continue iter=$((iter+1)) [ $iter -ne 1 ] && echo " }," >> "${JSON}" echo " {" >> "${JSON}" echo " \"data\": \"$file\"," >> "${JSON}" if [[ $file == */bdwlan.bin ]]; then file_ext="ff" else file_ext="$(printf '%x\n' "$(basename "${file}" | sed -E 's:^.*\.b?([0-9a-f]*)$:0x\1:')")" fi echo " \"names\": [\"bus=snoc,qmi-board-id=${file_ext}\"]" >> "${JSON}" done echo " }" >> "${JSON}" echo "]" >> "${JSON}" python2 qca-swiss-army-knife/tools/scripts/ath10k/ath10k-bdencoder -c "${JSON}" -o board-2.binAlso this may help, of course https://github.com/jhugo/linux/commits/5.5rc2_wifi
P.S.
= IPQ8074 WiFi driver In many Qualcomm SoC the WiFi solution is split between an in-SoC core that does protocol handling and an off-chip RF module. The communication of control messages with the protocol core is done over shared memory transports (SMD or GLINK) and has in the past (WCN3620, 3660 and 3680) been done with packed structs. In the latest incarnation this is replaced by QMI-encoded messages.By Alexey Min on 2022-12-04T09:33:19
Edited by Administrator - Clone, build, install https://github.com/andersson/qrtr ;
mentioned in merge request !1080 (merged)
By Alexey Min on 2020-03-19T15:53:54
mentioned in merge request !1095 (merged)
By Alexey Min on 2020-03-24T17:42:26
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Related: https://github.com/aarch64-laptops/build/issues/24
By Alexey Min on 2020-04-20T11:33:36
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Also got halium cnss-daemon working on willow:
xiaomi-willow:~# nmcli general status STATE CONNECTIVITY WIFI-HW WIFI WWAN-HW WWAN connected full enabled enabled enabled enabledQuick brain dump:
First I tried patching the andersson projects for minor sysfs differences (Didn't need either of the LD_PRELOADS on 4.14, near-mainline APIs) and with
qrtr-ns,pd-mapper,rmtfsandtqftpserverI was able to kick the modem (echo 1 >/dev/subsys_modemtwice) into pulling its firmware from tqftpserver, but it seemed like it would shut down immediately. IPA was fine loading its fw from udev (echo 1 >/dev/ipa), but I never gotecho ON >/dev/wlanto work, always timed out.qrtr-lookupnever showed ATH10K FW either.Installed
lxc-androidfrom !1144 (closed) with my small patches in comments, ran the 9 GSI img in OP, but was getting linker issues in vendor daemons?? @DolphinChips found me a GSI vendor partition for the willow: https://4pda.ru/forum/index.php?showtopic=976545&st=2480#entry95973867, I am completely unable to find information online about how these are being built. (elf patching? newer versions?) Anyway, I'm finally able toecho 1 >/dev/ipaand thenecho ON >/dev/wlanandwlan0comes up. That branch is here: https://gitlab.com/rjeli/pmaports/-/commits/xiaomi-willow-hybrisNow that I have it working end-to-end, I'll probably start stracing the QMI calls and adding printks to try and figure out why it didn't like mine. I would really be interested to see a block diagram, because I'm annoyed nothing ever worked without IPA. It seems somewhat straightforward to drop ath10k_snoc into our downstream trees but I'm not sure how solid the upstream IPA driver is.
By Eli Riggs on 2020-05-08T14:09:57
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Maybe this can somehow help: https://github.com/copslock/QCA_Tool/tree/master/qca/src/qca-cnss-daemon
It's looks like cnss_daemon source code for linux and android.
By map220v on 2022-01-14T18:30:40