HID: multitouch: Support PTP Stick and Touchpad device

BugLink:  https://bugs.launchpad.net/bugs/1712481

Support PTP Stick and Touchpad device. This Touchpad is Precision Touchpad
(PTP), and Stick Pointer data is the same as Mouse; Stick Pointer works as
Mouse.

[jkosina@suse.cz: changelog deuglification]
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

(cherry picked from commit 504c932c)
Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Colin King <colin.king@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/hid/hid-ids.h

@@ -69,6 +69,8 @@
 
 #define USB_VENDOR_ID_ALPS_JP		0x044E
 #define HID_DEVICE_ID_ALPS_U1_DUAL	0x120B
+#define HID_DEVICE_ID_ALPS_U1_DUAL_PTP	0x121F
+#define HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP	0x1220
 
 #define USB_VENDOR_ID_AMI		0x046b
 #define USB_DEVICE_ID_AMI_VIRT_KEYBOARD_AND_MOUSE	0xff10

drivers/hid/hid-multitouch.c

@@ -145,6 +145,7 @@ static void mt_post_parse(struct mt_device *td);
 /* reserved					0x0011 */
 #define MT_CLS_WIN_8				0x0012
 #define MT_CLS_EXPORT_ALL_INPUTS		0x0013
+#define MT_CLS_WIN_8_DUAL			0x0014
 
 /* vendor specific classes */
 #define MT_CLS_3M				0x0101
@@ -213,6 +214,12 @@ static struct mt_class mt_classes[] = {
 		.quirks = MT_QUIRK_ALWAYS_VALID |
 			MT_QUIRK_CONTACT_CNT_ACCURATE,
 		.export_all_inputs = true },
+	{ .name = MT_CLS_WIN_8_DUAL,
+		.quirks = MT_QUIRK_ALWAYS_VALID |
+			MT_QUIRK_IGNORE_DUPLICATES |
+			MT_QUIRK_HOVERING |
+			MT_QUIRK_CONTACT_CNT_ACCURATE,
+		.export_all_inputs = true },
 
 	/*
 	 * vendor specific classes
@@ -504,7 +511,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 			mt_store_field(usage, td, hi);
 			return 1;
 		case HID_DG_CONFIDENCE:
-			if (cls->name == MT_CLS_WIN_8 &&
+			if ((cls->name == MT_CLS_WIN_8 ||
+				cls->name == MT_CLS_WIN_8_DUAL) &&
 				field->application == HID_DG_TOUCHPAD)
 				cls->quirks |= MT_QUIRK_CONFIDENCE;
 			mt_store_field(usage, td, hi);
@@ -571,7 +579,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		 * MS PTP spec says that external buttons left and right have
 		 * usages 2 and 3.
 		 */
-		if (cls->name == MT_CLS_WIN_8 &&
+		if ((cls->name == MT_CLS_WIN_8 ||
+			cls->name == MT_CLS_WIN_8_DUAL) &&
 		    field->application == HID_DG_TOUCHPAD &&
 		    (usage->hid & HID_USAGE) > 1)
 			code--;
@@ -1209,6 +1218,16 @@ static const struct hid_device_id mt_devices[] = {
 		MT_USB_DEVICE(USB_VENDOR_ID_3M,
 			USB_DEVICE_ID_3M3266) },
 
+	/* Alps devices */
+	{ .driver_data = MT_CLS_WIN_8_DUAL,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_ALPS_JP,
+			HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
+	{ .driver_data = MT_CLS_WIN_8_DUAL,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_ALPS_JP,
+			HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
+
 	/* Anton devices */
 	{ .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
 		MT_USB_DEVICE(USB_VENDOR_ID_ANTON,