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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 Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/4edbe29f-00b9-8eef-9789-20bed0b141e2@gmail.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.