linux-kernel - [PATCH 0/5] HID: wacom: introduce generic HID handling

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Date:	Tue, 23 Sep 2014 12:08:04 -0400
From:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:	Jiri Kosina <jkosina@...e.cz>, Ping Cheng <pinglinux@...il.com>,
	killertofu@...il.com
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/5] HID: wacom: introduce generic HID handling

Hi guys,

So, this patch series aims at supporting natively any future HID compliant wacom
tablet. Those found on the various laptops (ISDv4/5) already are HID compliant
and they should work in the future without any modification of the kernel.

Few things to note here:
- I used the PID 0x00E6 found on the Lenovo X230 for the tests
- I did not removed its entry in the list because there is a slightly different
  behavior while using this patch set: when more than two fingers are on the
  screen, the tablet stops sending finger events, while with the wacom
  proprietary bits, it continues to send them. Besides that, the events emitted
  before and after the patch series are the same (at least on the E6)
- I can not rely on hid-input directly because wacom wants to be in control of
  the input devices it creates. This might be solved in the future, but for now
  it is just easier to rewrite the few mapping/events handling than trying to
  fit in the hid-input model.
- there will still be more specific use cases to handle later (see the joke of
  the MS surface 3 pen[1] for instance), but this should give a roughly working
  pen/touch support for those future devices.

Jason, I would be very glad if you could conduct a few tests for this on the
ISDv4/5 sensors you have.

Cheers,
Benjamin

[1] http://who-t.blogspot.com/2014/09/stylus-behaviour-on-microsoft-surface-3.html

Benjamin Tissoires (5):
  HID: wacom: rename failN with some meaningful information
  HID: wacom: split out input allocation and registration
  HID: wacom: move allocation of inputs earlier
  HID: wacom: implement generic HID handling for pen generic devices
  HID: wacom: implement the finger part of the HID generic handling

 drivers/hid/hid-core.c  |   3 +
 drivers/hid/wacom.h     |   6 +
 drivers/hid/wacom_sys.c | 184 +++++++++++++++++++++--------
 drivers/hid/wacom_wac.c | 299 ++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/hid/wacom_wac.h |  17 +++
 include/linux/hid.h     |   2 +
 6 files changed, 462 insertions(+), 49 deletions(-)

-- 
2.1.0

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