linux.git/drivers/input/tablet/wacom_sys.c, branch master

Input: wacom - move the USB (now hid) Wacom driver in drivers/hid

2014-07-26T01:55:38+00:00

wacom.ko is now a full HID driver, we have to move it into the proper
subdirectory: drivers/hid.

Signed-off-by: Benjamin Tissoires 
Signed-off-by: Dmitry Torokhov

Input: wacom - use hidinput_calc_abs_res instead of duplicating its code

2014-07-26T01:53:55+00:00

This may infer a small difference with the previous implementation
due to the DIV_ROUND_CLOSEST() in the hid implementation.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - use in-kernel HID parser

2014-07-26T01:53:55+00:00

HID already parses the report descriptor, so use it instead of implementing
our own.  The special case for Bamboo PT 3rd gen is also removed and
handled in the same way Intuos 5 is treated, by hardcoding it in the
driver.  Last, the unit_exponent stored into the hid field already is
signed, so there is no need to handle a two's complement anymore.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - use hid_info instead of plain dev_info

2014-07-26T01:53:54+00:00

Removes one more need of usb and intf.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - register power device at the HID level

2014-07-26T01:53:53+00:00

Use the HID device as the parent for the power device when dealing with
a wireless receiver.
Removes one more usb dependency and does not break user space.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - remove usb dependency for siblings devices

2014-07-26T01:53:53+00:00

Wacom tablets can share different physical sensors on one physical device.
These are called siblings in the code. The current way of implementation
relies on the USB topology to be able to share data amongs those sensors.

We can replace the code to match a HID subsystem, without involving the USB
topology:
- the first probed sensor does not find any siblings in the list
  wacom_udev_list, so it creates its own wacom_hdev_data with its own
  struct hid_device
- the other sensor checks the current list of siblings in wacom_hdev_data,
  and if there is a match, it associates itself to the matched device.

To be sure that we are not associating different sensors from different
physical devices, we also check for the phys path of the hid device which
contains the USB topology.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - register the input devices on top of the HID one

2014-07-26T01:53:52+00:00

Matches the current behavior of the HID subsystem and removes one more
dependency over USB.

The current user space clients which relies on this to fetch the
LEDs path need an update. However, we already break them in the
kernel v3.11 for the Bluetooth Wacom devices. They are going to be fixed
soon.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - install LED/OLED sysfs files in the HID device instead of USB

2014-07-26T01:53:52+00:00

Removes one more dependency over USB, but requires some changes in
the user space to find the sysfs files correctly.

This patch breaks the user space. However, the number of program
accessing the LEDs is quite limited and we can easily patch them
to handle the new HID behavior.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - compute the HID report size to get the actual packet size

2014-07-26T01:53:51+00:00

This removes an USB dependency and is more accurate: the computed pktlen
is the actual maximum size of the reports forwarded by the device.

Given that the pktlen is correctly computed/validated, we can store it now
in the features struct instead of having a special handling in the rest of
the code.

Likewise, this information is not mandatory anymore in the description
of devices in wacom_wac.c. They will be removed in a separate patch.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov

Input: wacom - use HID core to actually fetch the report descriptor

2014-07-26T01:53:51+00:00

HID core already retrieves the report descritor. There is no need
to ask ourself for one.

Signed-off-by: Benjamin Tissoires 
Reviewed-by: Jason Gerecke 
Tested-by: Jason Gerecke 
Signed-off-by: Dmitry Torokhov