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From:   Doug Anderson <dianders@chromium.org>
Date:   Wed, 1 Dec 2021 13:19:17 -0800
Message-ID: <CAD=FV=XMR33LONcyuvfLzJNd7vKB7vmiE1VSC_QArXA+Hy4Nsw@mail.gmail.com>
Subject: Re: mwifiex reset buggy
To:     Jupiter <jupiter.hce@gmail.com>
Cc:     linux-wireless <linux-wireless@vger.kernel.org>,
        Amitkumar Karwar <amitkumar.karwar@nxp.com>,
        Ganapathi Bhat <ganapathi.bhat@nxp.com>,
        Brian Norris <briannorris@chromium.org>,
        Abhishek Pandit-Subedi <abhishekpandit@chromium.org>,
        Linux MMC List <linux-mmc@vger.kernel.org>,
        Ulf Hansson <ulf.hansson@linaro.org>
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Hi,

On Mon, Nov 22, 2021 at 8:39 PM Jupiter <jupiter.hce@gmail.com> wrote:
>
> Hi Doug,
>
> I have updated the kernel to 5.10.59 which should be guaranteed to
> include your reset patch.
>
> But I could not connect to the WiFi.
>
> #  ifconfig mlan0 up
> [10262.988302] mwifiex_sdio mmc0:0001:1: host_to_card, write iomem
>  (1) failed: -110
> [10262.996049] mwifiex_sdio mmc0:0001:1: write CFG reg failed
> [10263.007337] mwifiex_sdio mmc0:0001:1: host_to_card, write iomem
>  (2) failed: -110
> [10263.015299] mwifiex_sdio mmc0:0001:1: write CFG reg failed
> [10263.021675] mwifiex_sdio mmc0:0001:1: host_to_card, write iomem
>  (3) failed: -110
> [10263.029839] mwifiex_sdio mmc0:0001:1: write CFG reg failed
> [10263.035386] mwifiex_sdio mmc0:0001:1: DNLD_CMD: host to card failed
>
> # echo 1 > /sys/kernel/debug/mwifiex/mlan0/reset
> [10517.451193] mwifiex_sdio mmc0:0001:1: Resetting per request
> [10517.479235] mwifiex_sdio mmc0:0001:1: host_to_card, write iomem
>  (1) failed: -110
> [10517.490283] mwifiex_sdio mmc0:0001:1: write CFG reg failed
> [10517.498995] mwifiex_sdio mmc0:0001:1: host_to_card, write iomem
>  (2) failed: -110
> [10517.509257] mwifiex_sdio mmc0:0001:1: write CFG reg failed
> [10517.517649] mwifiex_sdio mmc0:0001:1: host_to_card, write iomem
>  (3) failed: -110
> [10517.527838] mwifiex_sdio mmc0:0001:1: write CFG reg failed
> [10517.533765] mwifiex_sdio mmc0:0001:1: DNLD_CMD: host to card failed
>
> [10529.871099] mwifiex_sdio mmc0:0001:1: cmd_wait_q terminated: -110
> [10529.883401] mwifiex_sdio mmc0:0001:1: PREP_CMD: FW in reset state
> [10529.890488] mwifiex_sdio mmc0:0001:1: deleting the crypto keys
> [10529.896573] mwifiex_sdio mmc0:0001:1: PREP_CMD: FW in reset state
> [10529.903316] mwifiex_sdio mmc0:0001:1: deleting the crypto keys
>
> [10530.014334] mwifiex_sdio mmc0:0001:1: DNLD_CMD: host to card failed
> [10530.049847] mwifiex_sdio mmc0:0001:1: info: shutdown mwifiex...
> [10530.239910] mwifiex_sdio mmc0:0001:1: PREP_CMD: card is removed
> [10530.247919] mwifiex_sdio mmc0:0001:1: PREP_CMD: card is removed
> [10530.268721] mwifiex_sdio mmc0:0001:1: PREP_CMD: card is removed
> [10531.665962] mwifiex_sdio mmc0:0001:1: info: FW download over, size
> 255988 bytes
> [10531.911608] mwifiex_sdio mmc0:0001:1: WLAN FW is active
> [10531.964352] mwifiex_sdio mmc0:0001:1: CMD_RESP: cmd 0x242 error, result=0x2
> [10531.971894] mwifiex_sdio mmc0:0001:1: mwifiex_process_cmdresp: cmd
> 0x242 failed during       initialization
> [10532.125947] mwifiex_sdio mmc0:0001:1: info: MWIFIEX VERSION:
> mwifiex 1.0 (14.68.36.p204)
> [10532.134573] mwifiex_sdio mmc0:0001:1: driver_version = mwifiex 1.0
> (14.68.36.p204)
>
> Again, the /sys/kernel/debug/mwifiex/mlan0 is removed, it is
> completely broken for both WiFi modem reset and
> /sys/kernel/debug/mwifiex/mlan0/reset, let me know your advice to
> debug it or modify mwifiex source files.

Sorry, I think you're on your own here. I've only briefly touched upon
the Marvell reset code when I ran into trouble with it in the past but
it's definitely not something I have any real inside knowledge about.
My only suggestions would be to somehow get someone from Marvell (now
NXP I guess?) to help you debug or perhaps the people you got your
module from have some technical contacts that can help rope in someone
to help?

-Doug