Input: synaptics - report INPUT_PROP_TOPBUTTONPAD property

Check PNP ID of the PS/2 AUX port and report INPUT_PROP_TOPBUTTONPAD
property for for touchpads with top button areas.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 53 insertions, 2 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index d8d49d10f9bb..9d754103337d 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -117,6 +117,44 @@ void synaptics_reset(struct psmouse *psmouse)
 }
 
 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+/* This list has been kindly provided by Synaptics. */
+static const char * const topbuttonpad_pnp_ids[] = {
+        "LEN0017",
+        "LEN0018",
+        "LEN0019",
+        "LEN0023",
+        "LEN002A",
+        "LEN002B",
+        "LEN002C",
+        "LEN002D",
+        "LEN002E",
+        "LEN0033", /* Helix */
+        "LEN0034", /* T431s, T540, X1 Carbon 2nd */
+        "LEN0035", /* X240 */
+        "LEN0036", /* T440 */
+        "LEN0037",
+        "LEN0038",
+        "LEN0041",
+        "LEN0042", /* Yoga */
+        "LEN0045",
+        "LEN0046",
+        "LEN0047",
+        "LEN0048",
+        "LEN0049",
+        "LEN2000",
+        "LEN2001",
+        "LEN2002",
+        "LEN2003",
+        "LEN2004", /* L440 */
+        "LEN2005",
+        "LEN2006",
+        "LEN2007",
+        "LEN2008",
+        "LEN2009",
+        "LEN200A",
+        "LEN200B",
+        NULL
+};
 
 /*****************************************************************************
  *      Synaptics communications functions
@@ -1255,8 +1293,10 @@ static void set_abs_position_params(struct input_dev *dev,
         input_abs_set_res(dev, y_code, priv->y_res);
 }
 
-static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
+static void set_input_params(struct psmouse *psmouse,
+                             struct synaptics_data *priv)
 {
+        struct input_dev *dev = psmouse->dev;
         int i;
 
         /* Things that apply to both modes */
@@ -1325,6 +1365,17 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 
         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
+                /* See if this buttonpad has a top button area */
+                if (!strncmp(psmouse->ps2dev.serio->firmware_id, "PNP:", 4)) {
+                        for (i = 0; topbuttonpad_pnp_ids[i]; i++) {
+                                if (strstr(psmouse->ps2dev.serio->firmware_id,
+                                           topbuttonpad_pnp_ids[i])) {
+                                        __set_bit(INPUT_PROP_TOPBUTTONPAD,
+                                                  dev->propbit);
+                                        break;
+                                }
+                        }
+                }
                 /* Clickpads report only left button */
                 __clear_bit(BTN_RIGHT, dev->keybit);
                 __clear_bit(BTN_MIDDLE, dev->keybit);
@@ -1593,7 +1644,7 @@ static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
                      priv->board_id, priv->firmware_id);
 
-        set_input_params(psmouse->dev, priv);
+        set_input_params(psmouse, priv);
 
         /*
          * Encode touchpad model so that it can be used to set