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Subject: Re: [PATCH v3] wifi: rtl8xxxu: Support new chip RTL8710BU aka
 RTL8188GU
From:   Kalle Valo <kvalo@kernel.org>
In-Reply-To: <4edbe29f-00b9-8eef-9789-20bed0b141e2@gmail.com>
References: <4edbe29f-00b9-8eef-9789-20bed0b141e2@gmail.com>
To:     Bitterblue Smith <rtl8821cerfe2@gmail.com>
Cc:     "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
        Jes Sorensen <Jes.Sorensen@gmail.com>,
        Ping-Ke Shih <pkshih@realtek.com>, Jiajie Chen <c@jia.je>
User-Agent: pwcli/0.1.1-git (https://github.com/kvalo/pwcli/) Python/3.7.3
Message-ID: <167929169189.28804.16177211192382455088.kvalo@kernel.org>
Date:   Mon, 20 Mar 2023 05:54:53 +0000 (UTC)
Precedence: bulk

Bitterblue Smith <rtl8821cerfe2@gmail.com> wrote:

> This chip is found in cheap "free driver" USB adapters from Aliexpress.
> Initially they pretend to be a CD-ROM containing the driver for Windows.
> "Ejecting" switches the device to wifi mode.
> 
> Features: 2.4 GHz, b/g/n mode, 1T1R, 150 Mbps.
> 
> This chip is more unique than other Realtek chips:
> 
> * The registers at addresses 0x0-0xff, which all the other chips use,
>   can't be used here. New registers at 0x8000-0x80ff must be used
>   instead. And it's not a simple matter of adding 0x8000: 0x2
>   (REG_SYS_FUNC) became 0x8004, 0x80 (REG_MCU_FW_DL) became 0x8090,
>   etc.
> 
> * Also there are a few new registers which must be accessed indirectly
>   because their addresses don't fit in 16 bits. No other chips seem to
>   have these.
> 
> * The vendor driver compiles to 8188gu.ko, but the code calls the chip
>   RTL8710B(U) pretty much everywhere, including messages visible to the
>   user.
> 
> Another difference compared to the other chips supported by rtl8xxxu is
> that it has a new PHY status struct, or three of them actually, from
> which we extract the RSSI, among other things. This is not unique,
> though, just new. The chips supported by rtw88 also use it.
> 
> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
> Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
> Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150

Patch applied to wireless-next.git, thanks.

70664495e3d2 wifi: rtl8xxxu: Support new chip RTL8710BU aka RTL8188GU

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/4edbe29f-00b9-8eef-9789-20bed0b141e2@gmail.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches