| Message ID | 1352306256-12180-13-git-send-email-benjamin.tissoires@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Jiri Kosina |
| Headers | show |
Hi Benjamin, On Wed, Nov 07, 2012 at 05:37:35PM +0100, Benjamin Tissoires wrote: > Win 8 digitizer devices provides the actual scan time computed by the > hardware itself. The value is global to the frame and is not specific > to the multitouch protocol (though only touch, not pen, should use it > according to the specification). > > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> > --- > Documentation/input/event-codes.txt | 9 +++++++++ > drivers/hid/hid-input.c | 4 ++++ > include/linux/hid.h | 1 + > include/linux/input.h | 1 + > 4 files changed, 15 insertions(+) > > diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt > index 53305bd..80c06e5 100644 > --- a/Documentation/input/event-codes.txt > +++ b/Documentation/input/event-codes.txt > @@ -174,6 +174,15 @@ A few EV_ABS codes have special meanings: > the input device may be used freely in three dimensions, consider ABS_Z > instead. > > +* ABS_SCAN_TIME: > + - Used to report the number of microseconds since the last reset. This event > + should be coded as an uint32 value, which is allowed to wrap around with > + no special consequence. It is assumed that the time difference between two > + consecutive events is reliable on a reasonable time scale (hours). > + A reset to zero can happen, in which case the time since the last event is > + unknown. If the device does not provide this information, the driver must > + not provide it to the user space. > + This should not be an absolute event but rather EV_MSC/MSC_TIMESTAMP. Thanks.
diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt index 53305bd..80c06e5 100644 --- a/Documentation/input/event-codes.txt +++ b/Documentation/input/event-codes.txt @@ -174,6 +174,15 @@ A few EV_ABS codes have special meanings: the input device may be used freely in three dimensions, consider ABS_Z instead. +* ABS_SCAN_TIME: + - Used to report the number of microseconds since the last reset. This event + should be coded as an uint32 value, which is allowed to wrap around with + no special consequence. It is assumed that the time difference between two + consecutive events is reliable on a reasonable time scale (hours). + A reset to zero can happen, in which case the time since the last event is + unknown. If the device does not provide this information, the driver must + not provide it to the user space. + * ABS_MT_<name>: - Used to describe multitouch input events. Please see multi-touch-protocol.txt for details. diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 7015080..1c96238 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -677,6 +677,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel map_key_clear(BTN_STYLUS2); break; + case 0x56: /* Scan Time */ + map_abs(ABS_SCAN_TIME); + break; + default: goto unknown; } break; diff --git a/include/linux/hid.h b/include/linux/hid.h index 6b4f322..0337e50 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -279,6 +279,7 @@ struct hid_item { #define HID_DG_DEVICEINDEX 0x000d0053 #define HID_DG_CONTACTCOUNT 0x000d0054 #define HID_DG_CONTACTMAX 0x000d0055 +#define HID_DG_SCANTIME 0x000d0056 /* * HID report types --- Ouch! HID spec says 1 2 3! diff --git a/include/linux/input.h b/include/linux/input.h index ba48743..73c3a96 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -796,6 +796,7 @@ struct input_keymap_entry { #define ABS_TILT_X 0x1a #define ABS_TILT_Y 0x1b #define ABS_TOOL_WIDTH 0x1c +#define ABS_SCAN_TIME 0x1d #define ABS_VOLUME 0x20
Win 8 digitizer devices provides the actual scan time computed by the hardware itself. The value is global to the frame and is not specific to the multitouch protocol (though only touch, not pen, should use it according to the specification). Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> --- Documentation/input/event-codes.txt | 9 +++++++++ drivers/hid/hid-input.c | 4 ++++ include/linux/hid.h | 1 + include/linux/input.h | 1 + 4 files changed, 15 insertions(+)