Input: psmouse - allow disabing certain protocol extensions

Allow ALPS, LOGIPS2PP, LIFEBOOK, TRACKPOINT and TOUCHKIT protocol
extensions of psmouse to be disabled during compilation. This will
allow users save some memory when they are sure that they will only
use a certain type of mice.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 57 insertions, 42 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index f0f9413d762c..e42a0a4345ac 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -40,33 +40,70 @@
 #define YMIN_NOMINAL 1408
 #define YMAX_NOMINAL 4448
 
+
 /*****************************************************************************
- *      Synaptics communications functions
+ *      Stuff we need even when we do not want native Synaptics support
  ****************************************************************************/
 
 /*
- * Send a command to the synpatics touchpad by special commands
+ * Set the synaptics touchpad mode byte by special commands
  */
-static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
+static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
 {
-        if (psmouse_sliced_command(psmouse, c))
+        unsigned char param[1];
+
+        if (psmouse_sliced_command(psmouse, mode))
                 return -1;
-        if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
+        param[0] = SYN_PS_SET_MODE2;
+        if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
                 return -1;
         return 0;
 }
 
+int synaptics_detect(struct psmouse *psmouse, int set_properties)
+{
+        struct ps2dev *ps2dev = &psmouse->ps2dev;
+        unsigned char param[4];
+
+        param[0] = 0;
+
+        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+        ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
+
+        if (param[1] != 0x47)
+                return -ENODEV;
+
+        if (set_properties) {
+                psmouse->vendor = "Synaptics";
+                psmouse->name = "TouchPad";
+        }
+
+        return 0;
+}
+
+void synaptics_reset(struct psmouse *psmouse)
+{
+        /* reset touchpad back to relative mode, gestures enabled */
+        synaptics_mode_cmd(psmouse, 0);
+}
+
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+
+/*****************************************************************************
+ *      Synaptics communications functions
+ ****************************************************************************/
+
 /*
- * Set the synaptics touchpad mode byte by special commands
+ * Send a command to the synpatics touchpad by special commands
  */
-static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
+static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 {
-        unsigned char param[1];
-
-        if (psmouse_sliced_command(psmouse, mode))
+        if (psmouse_sliced_command(psmouse, c))
                 return -1;
-        param[0] = SYN_PS_SET_MODE2;
-        if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
+        if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
                 return -1;
         return 0;
 }
@@ -529,12 +566,6 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
         clear_bit(REL_Y, dev->relbit);
 }
 
-void synaptics_reset(struct psmouse *psmouse)
-{
-        /* reset touchpad back to relative mode, gestures enabled */
-        synaptics_mode_cmd(psmouse, 0);
-}
-
 static void synaptics_disconnect(struct psmouse *psmouse)
 {
         synaptics_reset(psmouse);
@@ -569,30 +600,6 @@ static int synaptics_reconnect(struct psmouse *psmouse)
         return 0;
 }
 
-int synaptics_detect(struct psmouse *psmouse, int set_properties)
-{
-        struct ps2dev *ps2dev = &psmouse->ps2dev;
-        unsigned char param[4];
-
-        param[0] = 0;
-
-        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
-        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
-        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
-        ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
-        ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
-
-        if (param[1] != 0x47)
-                return -1;
-
-        if (set_properties) {
-                psmouse->vendor = "Synaptics";
-                psmouse->name = "TouchPad";
-        }
-
-        return 0;
-}
-
 #if defined(__i386__)
 #include <linux/dmi.h>
 static struct dmi_system_id toshiba_dmi_table[] = {
@@ -680,4 +687,12 @@ int synaptics_init(struct psmouse *psmouse)
         return -1;
 }
 
+#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
+
+int synaptics_init(struct psmouse *psmouse)
+{
+        return -ENOSYS;
+}
+
+#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */