Commit Graph

10 Commits

Author SHA1 Message Date
Petri Gynther 4522643aa9 HID: uhid: Add UHID_CREATE2 + UHID_INPUT2
UHID_CREATE2:
HID report descriptor data (rd_data) is an array in struct uhid_create2_req,
instead of a pointer. Enables use from languages that don't support pointers,
e.g. Python.

UHID_INPUT2:
Data array is the last field of struct uhid_input2_req. Enables userspace to
write only the required bytes to kernel (ev.type + ev.u.input2.size + the part
of the data array that matters), instead of the entire struct uhid_input2_req.

Note:
UHID_CREATE2 increases the total size of struct uhid_event slightly, thus
increasing the size of messages that are queued for userspace. However, this
won't affect the userspace processing of these events.

[Jiri Kosina <jkosina@suse.cz>: adjust to hid_get_raw_report() and
				hid_output_raw_report() API changes]

Signed-off-by: Petri Gynther <pgynther@google.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-04-01 18:27:33 +02:00
Benjamin Tissoires 3c86726cfe HID: make .raw_request mandatory
SET_REPORT and GET_REPORT are mandatory in the HID specification.
Make the corresponding API in hid-core mandatory too, which removes the
need to test against it in some various places.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-02-24 17:23:15 +01:00
Benjamin Tissoires 6fad42d5fb HID: Add HID transport driver documentation
Add David Herrmann's documentation for the new low-level HID transport driver
functions.

Signed-off-by: Frank Praznik <frank.praznik@oh.rr.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-02-17 14:05:59 +01:00
David Herrmann bdb829e1dd HID: uhid: use generic hidinput_input_event()
HID core provides the same functionality and can convert the input event
to a raw output report. We can thus drop UHID_OUTPUT_EV and rely on the
mandatory UHID_OUTPUT.

User-space wasn't able to do anything with UHID_OUTPUT_EV, anyway. They
don't have access to the report fields.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-07-31 10:33:05 +02:00
Jiri Kosina 8ab726c183 HID: remove x bit from sensor doc
Reported-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-12-14 08:48:59 +01:00
Masanari Iida 4e79162a52 doc: fix quite a few typos within Documentation
Correct spelling typo in Documentations

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19 14:28:24 +01:00
srinivas pandruvada 620c789263 HID: sensors: add documentation
Added a summary of HID sensor framework.

Signed-off-by: srinivas pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-09-06 19:11:04 +01:00
David Herrmann d99b8bad76 HID: uhid: add documentation
This describes the protocol used by uhid for user-space applications. It
describes the details like non-blocking I/O and readv/writev for multiple
events per syscall.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-06-18 13:42:03 +02:00
Alan Ott 1a978c50c6 HID: Move hiddev.txt to the new Documentation/hid directory
With the new Documentation/hid directory, it makes sense to have
hiddev.txt here as well.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-03-22 11:43:51 +01:00
Alan Ott c54ea4918c HID: Documentation for hidraw
Documenation for the hidraw driver, with sample program.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-03-22 11:43:50 +01:00