On Mon, Feb 3, 2014 at 10:26 AM, David Herrmann <dh.herrmann@xxxxxxxxx> wrote:
> Hi
>
> On Sun, Feb 2, 2014 at 5:50 AM, Benjamin Tissoires
> <benjamin.tissoires@xxxxxxxxxx> wrote:
>> It was missing, so adding it.
>>
>> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
>> ---
>> drivers/hid/uhid.c | 17 +++++++++++++++++
>> 1 file changed, 17 insertions(+)
>>
>> diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
>> index f5a2b19..438c9f1 100644
>> --- a/drivers/hid/uhid.c
>> +++ b/drivers/hid/uhid.c
>> @@ -270,6 +270,22 @@ static int uhid_hid_output_report(struct hid_device *hid, __u8 *buf,
>> return count;
>> }
>>
>> +static int uhid_raw_request(struct hid_device *hid, unsigned char reportnum,
>> + __u8 *buf, size_t len, unsigned char rtype,
>> + int reqtype)
>> +{
>> + switch (reqtype) {
>> + case HID_REQ_GET_REPORT:
>> + return uhid_hid_get_raw(hid, reportnum, buf, len, rtype);
>> + case HID_REQ_SET_REPORT:
>> + if (buf[0] != reportnum)
>> + return -EINVAL;
>> + return uhid_hid_output_raw(hid, buf, len, rtype);
>
> But that one looks wrong. UHID does not have any SET_REPORT query in
> the protocol, yet. You turn a SET_REPORT into an OUTPUT_REPORT here.
> So if user-space gets the UHID_OUTPUT event, it doesn't know whether
> to send a SET_REPORT@ctrl to the device, or an async
> OUTPUT_REPORT@intr. This at least matters for low-energy BT in bluez,
> which uses uhid.
right. So we can drop this for now.
>
> So we'd have to add an UHID_SET_REPORT event. Note that currently
> UHID_FEATURE is the equivalent of UHID_GET_REPORT, but just horribly
> named..
ouch. I think this is something which can be fixed quite easily (by
marking UHID_FEATURE obsolete and creating the two events).
However, I don't think I will have the time to make the change and do
proper testings in the next few days/weeks.
Can somebody else take this?
Cheers,
Benjamin
>
> Thanks
> David
>
>> + default:
>> + return -EIO;
>> + }
>> +}
>> +
>> static struct hid_ll_driver uhid_hid_driver = {
>> .start = uhid_hid_start,
>> .stop = uhid_hid_stop,
>> @@ -277,6 +293,7 @@ static struct hid_ll_driver uhid_hid_driver = {
>> .close = uhid_hid_close,
>> .parse = uhid_hid_parse,
>> .output_report = uhid_hid_output_report,
>> + .raw_request = uhid_raw_request,
>> };
>>
>> #ifdef CONFIG_COMPAT
>> --
>> 1.8.3.1
>>
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