Input: psmouse - disable changing resolution/rate/scale for FocalTech

These PS/2 commands make some touchpads stop responding, so this commit
adds some dummy functions to replace the generic implementation. Because
scale changes were not encapsulated in a method of struct psmouse yet, this
commit adds a method set_scale to psmouse.
Signed-off-by: Mathias Gottschlag <mgottschlag@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/focaltech.c

@@ -386,6 +386,23 @@ static int focaltech_read_size(struct psmouse *psmouse)
 
 	return 0;
 }
+
+void focaltech_set_resolution(struct psmouse *psmouse, unsigned int resolution)
+{
+	/* not supported yet */
+}
+
+static void focaltech_set_rate(struct psmouse *psmouse, unsigned int rate)
+{
+	/* not supported yet */
+}
+
+static void focaltech_set_scale(struct psmouse *psmouse,
+				enum psmouse_scale scale)
+{
+	/* not supported yet */
+}
+
 int focaltech_init(struct psmouse *psmouse)
 {
 	struct focaltech_data *priv;
@@ -420,6 +437,14 @@ int focaltech_init(struct psmouse *psmouse)
 	psmouse->cleanup = focaltech_reset;
 	/* resync is not supported yet */
 	psmouse->resync_time = 0;
+	/*
+	 * rate/resolution/scale changes are not supported yet, and
+	 * the generic implementations of these functions seem to
+	 * confuse some touchpads
+	 */
+	psmouse->set_resolution = focaltech_set_resolution;
+	psmouse->set_rate = focaltech_set_rate;
+	psmouse->set_scale = focaltech_set_scale;
 
 	return 0;
 

drivers/input/mouse/psmouse-base.c

@@ -453,6 +453,17 @@ static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
 	psmouse->rate = r;
 }
 
+/*
+ * Here we set the mouse scaling.
+ */
+
+static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
+{
+	ps2_command(&psmouse->ps2dev, NULL,
+		    scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
+					       PSMOUSE_CMD_SETSCALE11);
+}
+
 /*
  * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
  */
@@ -689,6 +700,7 @@ static void psmouse_apply_defaults(struct psmouse *psmouse)
 
 	psmouse->set_rate = psmouse_set_rate;
 	psmouse->set_resolution = psmouse_set_resolution;
+	psmouse->set_scale = psmouse_set_scale;
 	psmouse->poll = psmouse_poll;
 	psmouse->protocol_handler = psmouse_process_byte;
 	psmouse->pktsize = 3;
@@ -1160,7 +1172,7 @@ static void psmouse_initialize(struct psmouse *psmouse)
 	if (psmouse_max_proto != PSMOUSE_PS2) {
 		psmouse->set_rate(psmouse, psmouse->rate);
 		psmouse->set_resolution(psmouse, psmouse->resolution);
-		ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
+		psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
 	}
 }
 

drivers/input/mouse/psmouse.h

@@ -36,6 +36,11 @@ typedef enum {
 	PSMOUSE_FULL_PACKET
 } psmouse_ret_t;
 
+enum psmouse_scale {
+	PSMOUSE_SCALE11,
+	PSMOUSE_SCALE21
+};
+
 struct psmouse {
 	void *private;
 	struct input_dev *dev;
@@ -67,6 +72,7 @@ struct psmouse {
 	psmouse_ret_t (*protocol_handler)(struct psmouse *psmouse);
 	void (*set_rate)(struct psmouse *psmouse, unsigned int rate);
 	void (*set_resolution)(struct psmouse *psmouse, unsigned int resolution);
+	void (*set_scale)(struct psmouse *psmouse, enum psmouse_scale scale);
 
 	int (*reconnect)(struct psmouse *psmouse);
 	void (*disconnect)(struct psmouse *psmouse);