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From:   Arend Van Spriel <arend.vanspriel@broadcom.com>
To:     Andy Green <andy@warmcat.com>, Shengyu Qu <wiagn233@outlook.com>
CC:     <franky.lin@broadcom.com>, <linux-wireless@vger.kernel.org>
Date:   Sun, 13 Nov 2022 11:56:11 +0100
Message-ID: <18470a1e910.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
In-Reply-To: <08416710-655a-c87c-a599-3fe2563f7de4@warmcat.com>
References: <TY3P286MB26114DD461F50814980453E598029@TY3P286MB2611.JPNP286.PROD.OUTLOOK.COM>
 <08416710-655a-c87c-a599-3fe2563f7de4@warmcat.com>
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Subject: Re: AP6275 / bcm43752 pcie on mainline brcmf
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On November 13, 2022 10:03:11 AM Andy Green <andy@warmcat.com> wrote:

> On 11/13/22 08:26, Shengyu Qu wrote:
>
>> Hello, I'm facing the same problem on sdio version of AP6275 module in 
>> mainline kernel. But I found a very old version from here could work with 
>> mainline brcmfmac driver.
>> Link: https://bbs.t-firefly.com/forum.php?mod=viewthread&tid=3107
>
> Thanks for the info.
>
> The firmware on the firefly thread doesn't seem to have a CLM blob that
> the mainline driver wants, just two types of the ~900KB main firmware
> for AP mode support or not.

A separate CLM blob may not be necessary when it is built-in in firmware 
which can be overloaded by separate blob, but in that case it is optional.

> It also doesn't have _sdio or _pcie in the filenames... I tried it but
> although it's different in what it read after downloading NVRAM
>
> [    3.775602] brcmfmac: brcmf_pcie_download_fw_nvram: sharedram_addr
> 0xfa2c05d3
>
> (the rockchip SDK firmware says 0xfa1a05e5)
>
> it still times it out a few seconds later as unresponsive after the fw
> load... maybe it is for SDIO only, or the lack of CLM, present in the
> Rockchip fw, means it won't get anywhere.

That sharedram_addr looks wrong. Probably the firmware is not booting for 
some reason. Can you provide a URL where I can download the rockchip 
firmware? My internet search skills are lacking.

>
>> Besides who I should ask to make proper firmware for it into linux-firmware 
>> repo?
>
> It would also be great to hear if the PCIe firmware from Rockchip aimed
> at the OOT driver was definitively incompatible with the mainline driver
> and we have to find a solution for that from Broadcom, or it is expected
> to basically work.  I realize it might not be easy to get an answer
> internally but this chipset is likely to appear in more RK3588 SBCs soon
> since it's the one on the evb.

Right now I don't have enough information to comment on this.

Regards,
Arend


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