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usb: gadget: add RNDIS configfs options for class/subclass/protocol

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This adds 3 new options to the RNDIS gadget function configs. It allows
overriding the default USB interface class/subclass/protocol.

The motivation for this is that if you set the values to "ef" (Misc),
"04" (RNDIS), "01" (Ethernet) respectively, then the device will be
recognized by the rndiscmp.inf file in Windows Vista and newer and will
cause Windows to load the correct RNDIS driver without the need for a
custom (signed) .inf file.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
David Lechner
2017-07-29 20:12:57 -05:00
committed by Felipe Balbi
parent 6cea1449f6
commit 73517cf49b
4 changed files with 62 additions and 0 deletions
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4
drivers/usb/gadget/function/u_rndis.h
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@@ -29,6 +29,10 @@ struct f_rndis_opts {
struct usb_os_desc rndis_os_desc;
char rndis_ext_compat_id[16];
u8 class;
u8 subclass;
u8 protocol;
/*
* Read/write access to configfs attributes is handled by configfs.
*