[PATCH v3 6/7] HID: uclogic: Add support for UGEE v2 mouse frames

["José Expósito" <jose.exposito89@gmail.com>]

Add the required HID descriptors and the initialization function for
UGEE v2 frames with a mouse in the frame.

Tested-by: Jouke Witteveen <j.witteveen@gmail.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 drivers/hid/hid-uclogic-params.c | 31 +++++++++++++++++++++++++++++
 drivers/hid/hid-uclogic-rdesc.c  | 34 ++++++++++++++++++++++++++++++++
 drivers/hid/hid-uclogic-rdesc.h  |  4 ++++
 3 files changed, 69 insertions(+)

diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c
index 8ac7caeda535..797eeb443c18 100644
--- a/drivers/hid/hid-uclogic-params.c
+++ b/drivers/hid/hid-uclogic-params.c
@@ -1188,6 +1188,31 @@ static int uclogic_params_ugee_v2_init_frame_dial(struct uclogic_params *p,
 	return 0;
 }
 
+/**
+ * uclogic_params_ugee_v2_init_frame_mouse() - initialize a UGEE v2 frame with a
+ * mouse.
+ * @p:			Parameters to fill in, cannot be NULL.
+ *
+ * Returns:
+ *	Zero, if successful. A negative errno code on error.
+ */
+static int uclogic_params_ugee_v2_init_frame_mouse(struct uclogic_params *p)
+{
+	int rc = 0;
+
+	if (!p)
+		return -EINVAL;
+
+	rc = uclogic_params_frame_init_with_desc(&p->frame_list[1],
+						 uclogic_rdesc_ugee_v2_frame_mouse_template_arr,
+						 uclogic_rdesc_ugee_v2_frame_mouse_template_size,
+						 UCLOGIC_RDESC_V1_FRAME_ID);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+
 /**
  * uclogic_params_ugee_v2_init() - initialize a UGEE graphics tablets by
  * discovering their parameters.
@@ -1231,6 +1256,12 @@ static int uclogic_params_ugee_v2_init(struct uclogic_params *params,
 
 	iface = to_usb_interface(hdev->dev.parent);
 	bInterfaceNumber = iface->cur_altsetting->desc.bInterfaceNumber;
+
+	if (bInterfaceNumber == 0) {
+		uclogic_params_ugee_v2_init_frame_mouse(&p);
+		goto output;
+	}
+
 	if (bInterfaceNumber != 2) {
 		uclogic_params_init_invalid(&p);
 		goto output;
diff --git a/drivers/hid/hid-uclogic-rdesc.c b/drivers/hid/hid-uclogic-rdesc.c
index 22429df693fc..fb9ca69f72c2 100644
--- a/drivers/hid/hid-uclogic-rdesc.c
+++ b/drivers/hid/hid-uclogic-rdesc.c
@@ -1001,6 +1001,40 @@ const __u8 uclogic_rdesc_ugee_v2_frame_dial_template_arr[] = {
 const size_t uclogic_rdesc_ugee_v2_frame_dial_template_size =
 			sizeof(uclogic_rdesc_ugee_v2_frame_dial_template_arr);
 
+/* Fixed report descriptor template for UGEE v2 frame reports (mouse) */
+const __u8 uclogic_rdesc_ugee_v2_frame_mouse_template_arr[] = {
+	0x05, 0x01,         /*  Usage Page (Desktop),                   */
+	0x09, 0x02,         /*  Usage (Mouse),                          */
+	0xA1, 0x01,         /*  Collection (Application),               */
+	0x85, 0x01,         /*      Report ID (1),                      */
+	0x05, 0x01,         /*      Usage Page (Pointer),               */
+	0xA0,               /*      Collection (Physical),              */
+	0x75, 0x01,         /*          Report Size (1),                */
+	0x95, 0x02,         /*          Report Count (2),               */
+	0x05, 0x09,         /*          Usage Page (Button),            */
+	0x19, 0x01,         /*          Usage Minimum (01h),            */
+	0x29, 0x02,         /*          Usage Maximum (02h),            */
+	0x14,               /*          Logical Minimum (0),            */
+	0x25, 0x01,         /*          Logical Maximum (1),            */
+	0x81, 0x02,         /*          Input (Variable),               */
+	0x95, 0x06,         /*          Report Count (6),               */
+	0x81, 0x01,         /*          Input (Constant),               */
+	0x05, 0x01,         /*          Usage Page (Generic Desktop),   */
+	0x09, 0x30,         /*          Usage (X),                      */
+	0x09, 0x31,         /*          Usage (Y),                      */
+	0x75, 0x10,         /*          Report Size (16),               */
+	0x95, 0x02,         /*          Report Count (2),               */
+	0x16, 0x00, 0x80,   /*          Logical Minimum (-32768),       */
+	0x26, 0xFF, 0x7F,   /*          Logical Maximum (32767),        */
+	0x81, 0x06,         /*          Input (Variable, Relative),     */
+	0x95, 0x01,         /*          Report Count (1),               */
+	0x81, 0x01,         /*          Input (Constant),               */
+	0xC0,               /*      End Collection,                     */
+	0xC0                /*  End Collection                          */
+};
+const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size =
+			sizeof(uclogic_rdesc_ugee_v2_frame_mouse_template_arr);
+
 /* Fixed report descriptor for Ugee EX07 frame */
 const __u8 uclogic_rdesc_ugee_ex07_frame_arr[] = {
 	0x05, 0x01,             /*  Usage Page (Desktop),                   */
diff --git a/drivers/hid/hid-uclogic-rdesc.h b/drivers/hid/hid-uclogic-rdesc.h
index 1a2d658bad3a..0502a0656496 100644
--- a/drivers/hid/hid-uclogic-rdesc.h
+++ b/drivers/hid/hid-uclogic-rdesc.h
@@ -173,6 +173,10 @@ extern const size_t uclogic_rdesc_ugee_v2_frame_btn_template_size;
 extern const __u8 uclogic_rdesc_ugee_v2_frame_dial_template_arr[];
 extern const size_t uclogic_rdesc_ugee_v2_frame_dial_template_size;
 
+/* Fixed report descriptor template for UGEE v2 frame reports (mouse) */
+extern const __u8 uclogic_rdesc_ugee_v2_frame_mouse_template_arr[];
+extern const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size;
+
 /* Fixed report descriptor for Ugee EX07 frame */
 extern const __u8 uclogic_rdesc_ugee_ex07_frame_arr[];
 extern const size_t uclogic_rdesc_ugee_ex07_frame_size;
-- 
2.25.1