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path: root/drivers/input/mouse/synaptics.c
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Diffstat (limited to 'drivers/input/mouse/synaptics.c')
-rw-r--r--drivers/input/mouse/synaptics.c60
1 files changed, 58 insertions, 2 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index c703d53be3a..14eaecea2b7 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -40,11 +40,27 @@
* Note that newer firmware allows querying device for maximum useable
* coordinates.
*/
+#define XMIN 0
+#define XMAX 6143
+#define YMIN 0
+#define YMAX 6143
#define XMIN_NOMINAL 1472
#define XMAX_NOMINAL 5472
#define YMIN_NOMINAL 1408
#define YMAX_NOMINAL 4448
+/* Size in bits of absolute position values reported by the hardware */
+#define ABS_POS_BITS 13
+
+/*
+ * Any position values from the hardware above the following limits are
+ * treated as "wrapped around negative" values that have been truncated to
+ * the 13-bit reporting range of the hardware. These are just reasonable
+ * guesses and can be adjusted if hardware is found that operates outside
+ * of these parameters.
+ */
+#define X_MAX_POSITIVE (((1 << ABS_POS_BITS) + XMAX) / 2)
+#define Y_MAX_POSITIVE (((1 << ABS_POS_BITS) + YMAX) / 2)
/*****************************************************************************
* Stuff we need even when we do not want native Synaptics support
@@ -139,6 +155,35 @@ static int synaptics_model_id(struct psmouse *psmouse)
}
/*
+ * Read the board id from the touchpad
+ * The board id is encoded in the "QUERY MODES" response
+ */
+static int synaptics_board_id(struct psmouse *psmouse)
+{
+ struct synaptics_data *priv = psmouse->private;
+ unsigned char bid[3];
+
+ if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
+ return -1;
+ priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
+ return 0;
+}
+
+/*
+ * Read the firmware id from the touchpad
+ */
+static int synaptics_firmware_id(struct psmouse *psmouse)
+{
+ struct synaptics_data *priv = psmouse->private;
+ unsigned char fwid[3];
+
+ if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
+ return -1;
+ priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
+ return 0;
+}
+
+/*
* Read the capability-bits from the touchpad
* see also the SYN_CAP_* macros
*/
@@ -261,6 +306,10 @@ static int synaptics_query_hardware(struct psmouse *psmouse)
return -1;
if (synaptics_model_id(psmouse))
return -1;
+ if (synaptics_firmware_id(psmouse))
+ return -1;
+ if (synaptics_board_id(psmouse))
+ return -1;
if (synaptics_capability(psmouse))
return -1;
if (synaptics_resolution(psmouse))
@@ -555,6 +604,12 @@ static int synaptics_parse_hw_state(const unsigned char buf[],
hw->right = (buf[0] & 0x02) ? 1 : 0;
}
+ /* Convert wrap-around values to negative */
+ if (hw->x > X_MAX_POSITIVE)
+ hw->x -= 1 << ABS_POS_BITS;
+ if (hw->y > Y_MAX_POSITIVE)
+ hw->y -= 1 << ABS_POS_BITS;
+
return 0;
}
@@ -1435,11 +1490,12 @@ static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
psmouse_info(psmouse,
- "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
+ "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
SYN_ID_MODEL(priv->identity),
SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
priv->model_id,
- priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
+ priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
+ priv->board_id, priv->firmware_id);
set_input_params(psmouse->dev, priv);