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authorAlexander Tsoy <alexander@tsoy.me>2019-06-30 00:32:00 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2019-06-30 00:35:25 -0700
commit8d3c60c7688ec17c084417b7f6ac57a1d5f154e1 (patch)
treee5260859ca5c09adeb003d8090042b4541f4ce0e /drivers/input
parentd69f62bed792fc0564198f2406151b0ea008b299 (diff)
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>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/joydev.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 4c1e427dfabb..319c641edb93 100644
--- 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);