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HID: wacom: implement generic HID handling for pen generic devices

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ISDv4 and v5 are plain HID devices. We can directly implement a generic
HID parsing/handling and remove the need to manually add those PID in
the list of supported devices.

This patch implements the pen support only. The finger part will come in
a later patch.

To be properly notified of an .event() and a .report(), we need to force
hid-core to go through the HID parsing. By default, wacom.ko binds only
hidraw, so the hid parsing is not done by hid-core. When a true HID device
is there, we add the flag HID_CLAIMED_DRIVER to hid->claimed which will
force hid-core to parse the incoming reports.
(Note that this can be easily backported by directly setting the .claimed
flag to HID_CLAIMED_DRIVER even if hid-core does not support
HID_CONNECT_DRIVER)

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Jason Gerecke <killertofu@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires
2014-09-23 12:08:08 -04:00
committed by Jiri Kosina
parent 494078b0bb
commit 7704ac9373
6 changed files with 208 additions and 2 deletions
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2
include/linux/hid.h
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@@ -265,6 +265,7 @@ struct hid_item {
#define HID_CONNECT_HIDDEV 0x08
#define HID_CONNECT_HIDDEV_FORCE 0x10
#define HID_CONNECT_FF 0x20
#define HID_CONNECT_DRIVER 0x40
#define HID_CONNECT_DEFAULT (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
HID_CONNECT_HIDDEV|HID_CONNECT_FF)
@@ -440,6 +441,7 @@ struct hid_output_fifo {
#define HID_CLAIMED_INPUT 1
#define HID_CLAIMED_HIDDEV 2
#define HID_CLAIMED_HIDRAW 4
#define HID_CLAIMED_DRIVER 8
#define HID_STAT_ADDED 1
#define HID_STAT_PARSED 2