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HID: detect Win 8 multitouch devices in core

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Detecting Win 8 multitouch devices in core allows us to set quirks
before the device is parsed through hid_hw_start().
It also simplifies the detection of those devices in hid-multitouch and
makes the handling of those devices cleaner.

As Win 8 multitouch panels are in the group multitouch and rely on a
special feature to be detected, this patch adds a bitfield in the parser.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Tested-by: Srinivas Pandruvada<srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires
2013-08-22 14:51:08 +02:00
committed by Jiri Kosina
parent 3dc8fc083d
commit f961bd3516
3 changed files with 31 additions and 13 deletions
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4
include/linux/hid.h
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@@ -295,6 +295,7 @@ struct hid_item {
#define HID_GROUP_GENERIC 0x0001
#define HID_GROUP_MULTITOUCH 0x0002
#define HID_GROUP_SENSOR_HUB 0x0003
#define HID_GROUP_MULTITOUCH_WIN_8 0x0004
/*
* This is the global environment of the parser. This information is
@@ -532,6 +533,8 @@ static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
#define HID_GLOBAL_STACK_SIZE 4
#define HID_COLLECTION_STACK_SIZE 4
#define HID_SCAN_FLAG_MT_WIN_8 0x00000001
struct hid_parser {
struct hid_global global;
struct hid_global global_stack[HID_GLOBAL_STACK_SIZE];
@@ -540,6 +543,7 @@ struct hid_parser {
unsigned collection_stack[HID_COLLECTION_STACK_SIZE];
unsigned collection_stack_ptr;
struct hid_device *device;
unsigned scan_flags;
};
struct hid_class_descriptor {