HID: multitouch: add support of Panasonic multitouch panels

While at it, also fix some minor codingstyle issues.
Signed-off-by: Denis Kovalev <Denis.Kovalev@dataart.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/Kconfig

@@ -354,6 +354,7 @@ config HID_MULTITOUCH
 	  - LG Display panels (Dell ST2220Tc)
 	  - Lumio CrystalTouch panels
 	  - MosArt dual-touch panels
+	  - Panasonic multitouch panels
 	  - PenMount dual touch panels
 	  - Perixx Peripad 701 touchpad
 	  - PixArt optical touch screen

drivers/hid/hid-core.c

@@ -1501,6 +1501,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC, USB_DEVICE_ID_PANABOARD_UBT780) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC, USB_DEVICE_ID_PANABOARD_UBT880) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_PCI) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },

drivers/hid/hid-ids.h

@@ -41,7 +41,7 @@
 #define USB_VENDOR_ID_ACTIONSTAR	0x2101
 #define USB_DEVICE_ID_ACTIONSTAR_1011	0x1011
 
-#define USB_VENDOR_ID_ADS_TECH 		0x06e1
+#define USB_VENDOR_ID_ADS_TECH		0x06e1
 #define USB_DEVICE_ID_ADS_TECH_RADIO_SI470X	0xa155
 
 #define USB_VENDOR_ID_AFATECH		0x15a4
@@ -565,6 +565,10 @@
 #define USB_DEVICE_ID_ORTEK_PKB1700	0x1700
 #define USB_DEVICE_ID_ORTEK_WKB2000	0x2000
 
+#define USB_VENDOR_ID_PANASONIC		0x04da
+#define USB_DEVICE_ID_PANABOARD_UBT780	0x1044
+#define USB_DEVICE_ID_PANABOARD_UBT880	0x104d
+
 #define USB_VENDOR_ID_PANJIT		0x134c
 
 #define USB_VENDOR_ID_PANTHERLORD	0x0810

drivers/hid/hid-multitouch.c

@@ -104,6 +104,7 @@ struct mt_device {
 #define MT_CLS_EGALAX				0x0103
 #define MT_CLS_EGALAX_SERIAL			0x0104
 #define MT_CLS_TOPSEED				0x0105
+#define MT_CLS_PANASONIC			0x0106
 
 #define MT_DEFAULT_MAXCONTACT	10
 
@@ -198,6 +199,9 @@ static struct mt_class mt_classes[] = {
 		.is_indirect = true,
 		.maxcontacts = 2,
 	},
+	{ .name = MT_CLS_PANASONIC,
+		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
+		.maxcontacts = 4 },
 
 	{ }
 };
@@ -278,8 +282,8 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 	int code;
 
 	/* Only map fields from TouchScreen or TouchPad collections.
-         * We need to ignore fields that belong to other collections
-         * such as Mouse that might have the same GenericDesktop usages. */
+	* We need to ignore fields that belong to other collections
+	* such as Mouse that might have the same GenericDesktop usages. */
 	if (field->application == HID_DG_TOUCHSCREEN)
 		set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
 	else if (field->application != HID_DG_TOUCHPAD)
@@ -581,9 +585,8 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
 			return 0;
 		}
 
-		if (usage->hid == td->last_slot_field) {
+		if (usage->hid == td->last_slot_field)
 			mt_complete_slot(td);
-		}
 
 		if (field->index == td->last_field_index
 			&& td->num_received >= td->num_expected)
@@ -857,6 +860,14 @@ static const struct hid_device_id mt_devices[] = {
 		HID_USB_DEVICE(USB_VENDOR_ID_TURBOX,
 			USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
 
+	/* Panasonic panels */
+	{ .driver_data = MT_CLS_PANASONIC,
+		HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
+			USB_DEVICE_ID_PANABOARD_UBT780) },
+	{ .driver_data = MT_CLS_PANASONIC,
+		HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
+			USB_DEVICE_ID_PANABOARD_UBT880) },
+
 	/* PenMount panels */
 	{ .driver_data = MT_CLS_CONFIDENCE,
 		HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,