HID: uclogic: Add support for XP-Pen Deco 01

Add support for XP-Pen Deco 01 to hid-uclogic.
Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

drivers/hid/hid-ids.h

@@ -1143,6 +1143,7 @@
 #define USB_VENDOR_ID_UGEE		0x28bd
 #define USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540	0x0075
 #define USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640	0x0094
+#define USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01	0x0042
 #define USB_DEVICE_ID_UGEE_TABLET_EX07S		0x0071
 
 #define USB_VENDOR_ID_UNITEC	0x227d

drivers/hid/hid-uclogic-core.c

@@ -350,6 +350,8 @@ static const struct hid_device_id uclogic_devices[] = {
 				USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
 				USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
+				USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, uclogic_devices);

drivers/hid/hid-uclogic-params.c

@@ -1018,6 +1018,29 @@ int uclogic_params_init(struct uclogic_params *params,
 			uclogic_params_init_with_pen_unused(&p);
 		}
 		break;
+	case VID_PID(USB_VENDOR_ID_UGEE,
+		     USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01):
+		/* If this is the pen and frame interface */
+		if (bInterfaceNumber == 1) {
+			/* Probe v1 pen parameters */
+			rc = uclogic_params_pen_init_v1(&p.pen, &found, hdev);
+			if (rc != 0) {
+				hid_err(hdev, "pen probing failed: %d\n", rc);
+				goto cleanup;
+			}
+			/* Initialize frame parameters */
+			rc = uclogic_params_frame_init_with_desc(
+				&p.frame,
+				uclogic_rdesc_xppen_deco01_frame_arr,
+				uclogic_rdesc_xppen_deco01_frame_size,
+				0);
+			if (rc != 0)
+				goto cleanup;
+		} else {
+			/* TODO: Consider marking the interface invalid */
+			uclogic_params_init_with_pen_unused(&p);
+		}
+		break;
 	case VID_PID(USB_VENDOR_ID_UGEE,
 		     USB_DEVICE_ID_UGEE_TABLET_EX07S):
 		/* Ignore non-pen interfaces */

drivers/hid/hid-uclogic-rdesc.c

@@ -728,6 +728,41 @@ const __u8 uclogic_rdesc_ugee_ex07_buttonpad_arr[] = {
 const size_t uclogic_rdesc_ugee_ex07_buttonpad_size =
 			sizeof(uclogic_rdesc_ugee_ex07_buttonpad_arr);
 
+/* Fixed report descriptor for XP-Pen Deco 01 frame controls */
+const __u8 uclogic_rdesc_xppen_deco01_frame_arr[] = {
+	0x05, 0x01, /*  Usage Page (Desktop),               */
+	0x09, 0x07, /*  Usage (Keypad),                     */
+	0xA1, 0x01, /*  Collection (Application),           */
+	0x85, 0x06, /*      Report ID (6),                  */
+	0x14,       /*      Logical Minimum (0),            */
+	0x25, 0x01, /*      Logical Maximum (1),            */
+	0x75, 0x01, /*      Report Size (1),                */
+	0x05, 0x0D, /*      Usage Page (Digitizer),         */
+	0x09, 0x39, /*      Usage (Tablet Function Keys),   */
+	0xA0,       /*      Collection (Physical),          */
+	0x05, 0x09, /*          Usage Page (Button),        */
+	0x19, 0x01, /*          Usage Minimum (01h),        */
+	0x29, 0x08, /*          Usage Maximum (08h),        */
+	0x95, 0x08, /*          Report Count (8),           */
+	0x81, 0x02, /*          Input (Variable),           */
+	0x05, 0x0D, /*          Usage Page (Digitizer),     */
+	0x09, 0x44, /*          Usage (Barrel Switch),      */
+	0x95, 0x01, /*          Report Count (1),           */
+	0x81, 0x02, /*          Input (Variable),           */
+	0x05, 0x01, /*          Usage Page (Desktop),       */
+	0x09, 0x30, /*          Usage (X),                  */
+	0x09, 0x31, /*          Usage (Y),                  */
+	0x95, 0x02, /*          Report Count (2),           */
+	0x81, 0x02, /*          Input (Variable),           */
+	0x95, 0x15, /*          Report Count (21),          */
+	0x81, 0x01, /*          Input (Constant),           */
+	0xC0,       /*      End Collection,                 */
+	0xC0        /*  End Collection                      */
+};
+
+const size_t uclogic_rdesc_xppen_deco01_frame_size =
+			sizeof(uclogic_rdesc_xppen_deco01_frame_arr);
+
 /**
  * uclogic_rdesc_template_apply() - apply report descriptor parameters to a
  * report descriptor template, creating a report descriptor. Copies the

drivers/hid/hid-uclogic-rdesc.h

@@ -135,4 +135,8 @@ extern const size_t uclogic_rdesc_buttonpad_v2_size;
 extern const __u8 uclogic_rdesc_ugee_ex07_buttonpad_arr[];
 extern const size_t uclogic_rdesc_ugee_ex07_buttonpad_size;
 
+/* Fixed report descriptor for XP-Pen Deco 01 frame controls */
+extern const __u8 uclogic_rdesc_xppen_deco01_frame_arr[];
+extern const size_t uclogic_rdesc_xppen_deco01_frame_size;
+
 #endif /* _HID_UCLOGIC_RDESC_H */