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    SubjectRe: [PATCH] HID: Add Support for Setting and Getting Feature Reports from hidraw
    On Mon,  7 Jun 2010 23:51:48 -0400
    Alan Ott <> wrote:

    > Per the HID Specification, Feature reports must be sent and received on
    > the Configuration endpoint (EP 0) through the Set_Report/Get_Report
    > interfaces. This patch adds two ioctls to hidraw to set and get feature
    > reports to and from the device. Modifications were made to hidraw and
    > usbhid.
    > New hidraw ioctls:
    > HIDIOCSFEATURE - Perform a Set_Report transfer of a Feature report.
    > HIDIOCGFEATURE - Perform a Get_Report transfer of a Feature report.
    > Signed-off-by: Alan Ott <>
    > ---

    Thanks Alan, I am going to test this quite soon.

    TBH, when I was thinking about how to extend hidraw I thought we could
    have added a new report_type field to struct hidraw_report_descriptor,
    in order to re-use the HIDIOCGRDESC ioctl handler itself, adding then a
    HIDIOCSRDESC for setting the report. This looked cleaner to my eyes,
    but I didn't actually implement this, so I don't know if it was
    feasible, for instance one problem I didn't investigate further was
    about the default value of the aforementioned report_type field in
    order to keep the current behavior of HIDIOCGRDESC.


    Antonio Ospite

    PGP public key ID: 0x4553B001

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