usb: gadget: f_fs: OS descriptors support

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Add support for OS descriptors. The new format of descriptors is used,
because the "flags" field is required for extensions. os_count gives
the number of OSDesc[] elements.
The format of descriptors is given in include/uapi/linux/usb/functionfs.h.

For extended properties descriptor the usb_ext_prop_desc structure covers
only a part of a descriptor, because the wPropertyNameLength is unknown
up front.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

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This commit is contained in:

Andrzej Pietrasiewicz 2014-07-09 12:20:08 +02:00 • committed by Felipe Balbi

parent 7ea4f088c8

commit f0175ab519

3 changed files with 419 additions and 10 deletions

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341

drivers/usb/gadget/f_fs.c

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7

drivers/usb/gadget/u_fs.h

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81

include/uapi/linux/usb/functionfs.h

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