On Mar 11 2015 or thereabouts, Seth Forshee wrote: > According to [1], Windows Precision Touchpad devices must supply > a button type usage in the device capabilities feature report. A > value of 0 indicates that the device contains a depressible > button (i.e. it's a click-pad) whereas a value of 1 indicates > a non-depressible button. Add support for this usage and set > INPUT_PROP_BUTTONPAD on the touchpad input device whenever a > depressible button is present. > > [1] https://msdn.microsoft.com/en-us/library/windows/hardware/dn467314(v=vs.85).aspx > > Signed-off-by: Seth Forshee <seth.forshee@xxxxxxxxxxxxx> > --- Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> Thanks for the quick re-spin Cheers, Benjamin > drivers/hid/hid-debug.c | 1 + > drivers/hid/hid-multitouch.c | 16 ++++++++++++++++ > include/linux/hid.h | 1 + > 3 files changed, 18 insertions(+) > > diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c > index 8bf61d295ffd..4b2a18a8b7ec 100644 > --- a/drivers/hid/hid-debug.c > +++ b/drivers/hid/hid-debug.c > @@ -165,6 +165,7 @@ static const struct hid_usage_entry hid_usage_table[] = { > {0, 0x53, "DeviceIndex"}, > {0, 0x54, "ContactCount"}, > {0, 0x55, "ContactMaximumNumber"}, > + {0, 0x59, "ButtonType"}, > {0, 0x5A, "SecondaryBarrelSwitch"}, > {0, 0x5B, "TransducerSerialNumber"}, > { 15, 0, "PhysicalInterfaceDevice" }, > diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c > index a8bec33f4764..6a9b05b328a9 100644 > --- a/drivers/hid/hid-multitouch.c > +++ b/drivers/hid/hid-multitouch.c > @@ -71,6 +71,8 @@ MODULE_LICENSE("GPL"); > #define MT_INPUTMODE_TOUCHSCREEN 0x02 > #define MT_INPUTMODE_TOUCHPAD 0x03 > > +#define MT_BUTTONTYPE_CLICKPAD 0 > + > struct mt_slot { > __s32 x, y, cx, cy, p, w, h; > __s32 contactid; /* the device ContactID assigned to this slot */ > @@ -116,6 +118,7 @@ struct mt_device { > * 1 means we should use a serial protocol > * > 1 means hybrid (multitouch) protocol */ > __u8 buttons_count; /* number of physical buttons per touchpad */ > + bool is_buttonpad; /* is this device a button pad? */ > bool serial_maybe; /* need to check for serial protocol */ > bool curvalid; /* is the current contact valid? */ > unsigned mt_flags; /* flags to pass to input-mt */ > @@ -334,6 +337,16 @@ static void mt_feature_mapping(struct hid_device *hdev, > td->maxcontacts = td->mtclass.maxcontacts; > > break; > + case HID_DG_BUTTONTYPE: > + if (usage->usage_index >= field->report_count) { > + dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n"); > + break; > + } > + > + if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD) > + td->is_buttonpad = true; > + > + break; > } > } > > @@ -734,6 +747,9 @@ static void mt_touch_input_configured(struct hid_device *hdev, > > /* check for clickpads */ > if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1)) > + td->is_buttonpad = true; > + > + if (td->is_buttonpad) > __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); > > input_mt_init_slots(input, td->maxcontacts, td->mt_flags); > diff --git a/include/linux/hid.h b/include/linux/hid.h > index 69f9cf7f078d..0167e0e0bf88 100644 > --- a/include/linux/hid.h > +++ b/include/linux/hid.h > @@ -270,6 +270,7 @@ struct hid_item { > #define HID_DG_DEVICEINDEX 0x000d0053 > #define HID_DG_CONTACTCOUNT 0x000d0054 > #define HID_DG_CONTACTMAX 0x000d0055 > +#define HID_DG_BUTTONTYPE 0x000d0059 > #define HID_DG_BARRELSWITCH2 0x000d005a > #define HID_DG_TOOLSERIALNUMBER 0x000d005b > > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
