unifying: partially implement TouchpadRawXY for T650

This feature will probably not be supported. Right now it reports some
information, but as the emulated device does not send raw output, it is
kind of broken.

Signed-off-by: Peter Wu <peter@lekensteyn.nl>

1 files changed, 21 insertions, 1 deletions

diff --git a/hw/usb/hid-logitech-hidpp20.c b/hw/usb/hid-logitech-hidpp20.c
index 72e610b5e2..51e9596151 100644
--- a/hw/usb/hid-logitech-hidpp20.c
+++ b/hw/usb/hid-logitech-hidpp20.c
@@ -376,8 +376,28 @@ static HIDPP20_FEATURE(feat_mousepointer)
 
 static HIDPP20_FEATURE(feat_touchpadrawxy)
 {
-    return -HIDPP20_ERR_CODE_UNSUPPORTED; /* TODO STUB */
     switch (fn) {
+    case 0: /* info = GetTouchpadInfo() */
+        /* NOTE: hard-coded for T650 */
+        params[0] = 0x0B; params[1] = 0x10; /* X max pixels */
+        params[2] = 0x09; params[3] = 0x3C; /* Y max pixels */
+        params[4] = 0x08; /* Z data range (in bits) */
+        params[5] = 0x08; /* area data size (in bits) */
+        params[6] = 0x08; /* timestamp unit 1ms */
+        params[7] = 0x0A; /* max fingers */
+        params[8] = 0x01; /* origin position: lower-left */
+        params[13] = 0x02; params[14] = 0x58; /* DPI (same for X and Y) */
+        return 15;
+    case 1: /* state = GetRawReportState() */
+        /* disable raw */
+        params[0] = 0;
+        return 1;
+    case 2: /* SetRawReportState(state) */
+        if (params[0] & 0x11) {
+            /* raw mode is not implemented (note: not sent by real hw) */
+            return -HIDPP20_ERR_CODE_UNSUPPORTED;
+        }
+        return 0;
     default:
         return -HIDPP20_ERR_CODE_INVALID_FUNCTION_ID;
     }