Input: synaptics - add support for ForcePads

[mirror_ubuntu-artful-kernel.git] / drivers / input / mouse / synaptics.c

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index e8573c68f77e900e83e054c720443328adfa2f7f..fd23181c1fb741112f1cc33fa0fc6111284823c3 100644 (file)
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -629,10 +629,61 @@ static int synaptics_parse_hw_state(const unsigned char buf[],
                         ((buf[0] & 0x04) >> 1) |
                         ((buf[3] & 0x04) >> 2));
 
+               if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
+                       SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
+                   hw->w == 2) {
+                       synaptics_parse_agm(buf, priv, hw);
+                       return 1;
+               }
+
+               hw->x = (((buf[3] & 0x10) << 8) |
+                        ((buf[1] & 0x0f) << 8) |
+                        buf[4]);
+               hw->y = (((buf[3] & 0x20) << 7) |
+                        ((buf[1] & 0xf0) << 4) |
+                        buf[5]);
+               hw->z = buf[2];
+
                hw->left  = (buf[0] & 0x01) ? 1 : 0;
                hw->right = (buf[0] & 0x02) ? 1 : 0;
 
-               if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
+               if (SYN_CAP_FORCEPAD(priv->ext_cap_0c)) {
+                       /*
+                        * ForcePads, like Clickpads, use middle button
+                        * bits to report primary button clicks.
+                        * Unfortunately they report primary button not
+                        * only when user presses on the pad above certain
+                        * threshold, but also when there are more than one
+                        * finger on the touchpad, which interferes with
+                        * out multi-finger gestures.
+                        */
+                       if (hw->z == 0) {
+                               /* No contacts */
+                               priv->press = priv->report_press = false;
+                       } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
+                               /*
+                                * Single-finger touch with pressure above
+                                * the threshold. If pressure stays long
+                                * enough, we'll start reporting primary
+                                * button. We rely on the device continuing
+                                * sending data even if finger does not
+                                * move.
+                                */
+                               if  (!priv->press) {
+                                       priv->press_start = jiffies;
+                                       priv->press = true;
+                               } else if (time_after(jiffies,
+                                               priv->press_start +
+                                                       msecs_to_jiffies(50))) {
+                                       priv->report_press = true;
+                               }
+                       } else {
+                               priv->press = false;
+                       }
+
+                       hw->left = priv->report_press;
+
+               } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
                        /*
                         * Clickpad's button is transmitted as middle button,
                         * however, since it is primary button, we will report
@@ -651,21 +702,6 @@ static int synaptics_parse_hw_state(const unsigned char buf[],
                        hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
                }
 
-               if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
-                       SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
-                   hw->w == 2) {
-                       synaptics_parse_agm(buf, priv, hw);
-                       return 1;
-               }
-
-               hw->x = (((buf[3] & 0x10) << 8) |
-                        ((buf[1] & 0x0f) << 8) |
-                        buf[4]);
-               hw->y = (((buf[3] & 0x20) << 7) |
-                        ((buf[1] & 0xf0) << 4) |
-                        buf[5]);
-               hw->z = buf[2];
-
                if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
                    ((buf[0] ^ buf[3]) & 0x02)) {
                        switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {