Input: joydev - extend absolute mouse detection

Extend event signature matching to catch more input devices emulated by
BMC firmwares, QEMU and VMware.

Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 4c1e427..319c641 100644 (file)
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -812,6 +812,7 @@ static bool joydev_dev_is_blacklisted(struct input_dev *dev)
 static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
 {
        DECLARE_BITMAP(jd_scratch, KEY_CNT);
+       bool ev_match = false;
 
        BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT);
 
@@ -830,17 +831,36 @@ static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
         * considered to be an absolute mouse if the following is
         * true:
         *
-        * 1) Event types are exactly EV_ABS, EV_KEY and EV_SYN.
+        * 1) Event types are exactly
+        *      EV_ABS, EV_KEY and EV_SYN
+        *    or
+        *      EV_ABS, EV_KEY, EV_SYN and EV_MSC
+        *    or
+        *      EV_ABS, EV_KEY, EV_SYN, EV_MSC and EV_REL.
         * 2) Absolute events are exactly ABS_X and ABS_Y.
         * 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE.
         * 4) Device is not on "Amiga" bus.
         */
 
        bitmap_zero(jd_scratch, EV_CNT);
+       /* VMware VMMouse, HP ILO2 */
        __set_bit(EV_ABS, jd_scratch);
        __set_bit(EV_KEY, jd_scratch);
        __set_bit(EV_SYN, jd_scratch);
-       if (!bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+       if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+               ev_match = true;
+
+       /* HP ILO2, AMI BMC firmware */
+       __set_bit(EV_MSC, jd_scratch);
+       if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+               ev_match = true;
+
+       /* VMware Virtual USB Mouse, QEMU USB Tablet, ATEN BMC firmware */
+       __set_bit(EV_REL, jd_scratch);
+       if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
+               ev_match = true;
+
+       if (!ev_match)
                return false;
 
        bitmap_zero(jd_scratch, ABS_CNT);