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 <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/mouse/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called psmouse.
 
+config MOUSE_PS2_ALPS
+	bool "ALPS PS/2 mouse protocol extension" if EMBEDDED
+	default y
+	depends on MOUSE_PS2
+	---help---
+	  Say Y here if you have an ALPS PS/2 touchpad connected to
+	  your system.
+
+	  If unsure, say Y.
+
+config MOUSE_PS2_LOGIPS2PP
+	bool "Logictech PS/2++ mouse protocol extension" if EMBEDDED
+	default y
+	depends on MOUSE_PS2
+	---help---
+	  Say Y here if you have a Logictech PS/2++ mouse connected to
+	  your system.
+
+	  If unsure, say Y.
+
+config MOUSE_PS2_SYNAPTICS
+	bool "Synaptics PS/2 mouse protocol extension" if EMBEDDED
+	default y
+	depends on MOUSE_PS2
+	---help---
+	  Say Y here if you have a Synaptics PS/2 TouchPad connected to
+	  your system.
+
+	  If unsure, say Y.
+
+config MOUSE_PS2_LIFEBOOK
+	bool "Fujitsu Lifebook PS/2 mouse protocol extension" if EMBEDDED
+	default y
+	depends on MOUSE_PS2
+	---help---
+	  Say Y here if you have a Fujitsu B-series Lifebook PS/2
+	  TouchScreen connected to your system.
+
+	  If unsure, say Y.
+
+config MOUSE_PS2_TRACKPOINT
+	bool "IBM Trackpoint PS/2 mouse protocol extension" if EMBEDDED
+	default y
+	depends on MOUSE_PS2
+	---help---
+	  Say Y here if you have an IBM Trackpoint PS/2 mouse connected
+	  to your system.
+
+	  If unsure, say Y.
+
+config MOUSE_PS2_TOUCHKIT
+	bool "eGalax TouchKit PS/2 protocol extension"
+	depends on MOUSE_PS2
+	---help---
+	  Say Y here if you have an eGalax TouchKit PS/2 touchscreen
+	  connected to your system.
+
+	  If unsure, say N.
+
 config MOUSE_SERIAL
 	tristate "Serial mouse"
 	select SERIO
···
 	  digitizer (VSXXX-AB) DEC produced.
 
 config MOUSE_HIL
-	tristate "HIL pointers (mice etc)."     
+	tristate "HIL pointers (mice etc)."
 	depends on GSC || HP300
 	select HP_SDC
 	select HIL_MLC

drivers/input/mouse/Makefile

···
 obj-$(CONFIG_MOUSE_HIL)		+= hil_ptr.o
 obj-$(CONFIG_MOUSE_VSXXXAA)	+= vsxxxaa.o
 
-psmouse-objs  := psmouse-base.o alps.o logips2pp.o synaptics.o lifebook.o \
-		trackpoint.o touchkit_ps2.o
+psmouse-objs := psmouse-base.o synaptics.o
+
+psmouse-$(CONFIG_MOUSE_PS2_ALPS)	+= alps.o
+psmouse-$(CONFIG_MOUSE_PS2_LOGIPS2PP)	+= logips2pp.o
+psmouse-$(CONFIG_MOUSE_PS2_LIFEBOOK)	+= lifebook.o
+psmouse-$(CONFIG_MOUSE_PS2_TRACKPOINT)	+= trackpoint.o
+psmouse-$(CONFIG_MOUSE_PS2_TOUCHKIT)	+= touchkit_ps2.o

drivers/input/mouse/alps.h

···
 #ifndef _ALPS_H
 #define _ALPS_H
 
-int alps_detect(struct psmouse *psmouse, int set_properties);
-int alps_init(struct psmouse *psmouse);
-
 struct alps_model_info {
         unsigned char signature[3];
         unsigned char byte0, mask0;
···
 	const struct alps_model_info *i;/* Info */
 	int prev_fin;			/* Finger bit from previous packet */
 };
+
+#ifdef CONFIG_MOUSE_PS2_ALPS
+int alps_detect(struct psmouse *psmouse, int set_properties);
+int alps_init(struct psmouse *psmouse);
+#else
+inline int alps_detect(struct psmouse *psmouse, int set_properties)
+{
+	return -ENOSYS;
+}
+inline int alps_init(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_MOUSE_PS2_ALPS */
 
 #endif

drivers/input/mouse/lifebook.h

···
 #ifndef _LIFEBOOK_H
 #define _LIFEBOOK_H
 
+#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
 int lifebook_detect(struct psmouse *psmouse, int set_properties);
 int lifebook_init(struct psmouse *psmouse);
+#else
+inline int lifebook_detect(struct psmouse *psmouse, int set_properties)
+{
+	return -ENOSYS;
+}
+inline int lifebook_init(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+#endif
 
 #endif

drivers/input/mouse/logips2pp.h

···
 #ifndef _LOGIPS2PP_H
 #define _LOGIPS2PP_H
 
+#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
 int ps2pp_init(struct psmouse *psmouse, int set_properties);
+#else
+inline int ps2pp_init(struct psmouse *psmouse, int set_properties)
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_MOUSE_PS2_LOGIPS2PP */
 
 #endif

drivers/input/mouse/psmouse-base.c

···
 		return PSMOUSE_THINKPS;
 
 /*
- * Try Synaptics TouchPad
+ * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
+ * support is disabled in config - we need to know if it is synaptics so we
+ * can reset it properly after probing for intellimouse.
  */
 	if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
 		synaptics_hardware = 1;
···
 		.maxproto	= 1,
 		.detect		= ps2bare_detect,
 	},
+#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
 	{
 		.type		= PSMOUSE_PS2PP,
 		.name		= "PS2++",
 		.alias		= "logitech",
 		.detect		= ps2pp_init,
 	},
+#endif
 	{
 		.type		= PSMOUSE_THINKPS,
 		.name		= "ThinkPS/2",
···
 		.maxproto	= 1,
 		.detect		= im_explorer_detect,
 	},
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 	{
 		.type		= PSMOUSE_SYNAPTICS,
 		.name		= "SynPS/2",
···
 		.detect		= synaptics_detect,
 		.init		= synaptics_init,
 	},
+#endif
+#ifdef CONFIG_MOUSE_PS2_ALPS
 	{
 		.type		= PSMOUSE_ALPS,
 		.name		= "AlpsPS/2",
···
 		.detect		= alps_detect,
 		.init		= alps_init,
 	},
+#endif
+#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
 	{
 		.type		= PSMOUSE_LIFEBOOK,
 		.name		= "LBPS/2",
 		.alias		= "lifebook",
 		.init		= lifebook_init,
 	},
+#endif
+#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
 	{
 		.type		= PSMOUSE_TRACKPOINT,
 		.name		= "TPPS/2",
 		.alias		= "trackpoint",
 		.detect		= trackpoint_detect,
 	},
+#endif
+#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
 	{
 		.type		= PSMOUSE_TOUCHKIT_PS2,
 		.name		= "touchkitPS/2",
 		.alias		= "touchkit",
 		.detect		= touchkit_ps2_detect,
 	},
+#endif
 	{
 		.type		= PSMOUSE_AUTO,
 		.name		= "auto",

drivers/input/mouse/synaptics.c

···
 #define YMIN_NOMINAL 1408
 #define YMAX_NOMINAL 4448
 
-/*****************************************************************************
- *	Synaptics communications functions
- ****************************************************************************/
 
-/*
- * Send a command to the synpatics touchpad by special commands
- */
-static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
-{
-	if (psmouse_sliced_command(psmouse, c))
-		return -1;
-	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
-		return -1;
-	return 0;
-}
+/*****************************************************************************
+ *	Stuff we need even when we do not want native Synaptics support
+ ****************************************************************************/
 
 /*
  * Set the synaptics touchpad mode byte by special commands
···
 		return -1;
 	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
+ ****************************************************************************/
+
+/*
+ * Send a command to the synpatics touchpad by special commands
+ */
+static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
+{
+	if (psmouse_sliced_command(psmouse, c))
+		return -1;
+	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return -1;
 	return 0;
 }
···
 	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);
···
 	if (synaptics_set_absolute_mode(psmouse)) {
 		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 		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 -1;
-
-	if (set_properties) {
-		psmouse->vendor = "Synaptics";
-		psmouse->name = "TouchPad";
 	}
 
 	return 0;
···
 	return -1;
 }
 
+#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
+
+int synaptics_init(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+
+#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
 

drivers/input/mouse/synaptics.h

···
 #ifndef _SYNAPTICS_H
 #define _SYNAPTICS_H
 
-extern int synaptics_detect(struct psmouse *psmouse, int set_properties);
-extern int synaptics_init(struct psmouse *psmouse);
-extern void synaptics_reset(struct psmouse *psmouse);
-
 /* synaptics queries */
 #define SYN_QUE_IDENTIFY		0x00
 #define SYN_QUE_MODES			0x01
···
 #define SYN_MODE_WMODE(m)		((m) & (1 << 0))
 
 /* synaptics identify query bits */
-#define SYN_ID_MODEL(i) 		(((i) >> 4) & 0x0f)
-#define SYN_ID_MAJOR(i) 		((i) & 0x0f)
-#define SYN_ID_MINOR(i) 		(((i) >> 16) & 0xff)
+#define SYN_ID_MODEL(i)			(((i) >> 4) & 0x0f)
+#define SYN_ID_MAJOR(i)			((i) & 0x0f)
+#define SYN_ID_MINOR(i)			(((i) >> 16) & 0xff)
 #define SYN_ID_IS_SYNAPTICS(i)		((((i) >> 8) & 0xff) == 0x47)
 
 /* synaptics special commands */
···
 struct synaptics_data {
 	/* Data read from the touchpad */
 	unsigned long int model_id;		/* Model-ID */
-	unsigned long int capabilities; 	/* Capabilities */
-	unsigned long int ext_cap; 		/* Extended Capabilities */
+	unsigned long int capabilities;		/* Capabilities */
+	unsigned long int ext_cap;		/* Extended Capabilities */
 	unsigned long int identity;		/* Identification */
 
 	unsigned char pkt_type;			/* packet type - old, new, etc */
 	unsigned char mode;			/* current mode byte */
 	int scroll;
 };
+
+int synaptics_detect(struct psmouse *psmouse, int set_properties);
+int synaptics_init(struct psmouse *psmouse);
+void synaptics_reset(struct psmouse *psmouse);
 
 #endif /* _SYNAPTICS_H */

drivers/input/mouse/touchkit_ps2.h

···
 #ifndef _TOUCHKIT_PS2_H
 #define _TOUCHKIT_PS2_H
 
+#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
 int touchkit_ps2_detect(struct psmouse *psmouse, int set_properties);
+#else
+inline int touchkit_ps2_detect(struct psmouse *psmouse, int set_properties)
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_MOUSE_PS2_TOUCHKIT */
 
 #endif

drivers/input/mouse/trackpoint.h

···
 	unsigned char ext_dev;
 };
 
-extern int trackpoint_detect(struct psmouse *psmouse, int set_properties);
+#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
+int trackpoint_detect(struct psmouse *psmouse, int set_properties);
+#else
+inline int trackpoint_detect(struct psmouse *psmouse, int set_properties)
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_MOUSE_PS2_TRACKPOINT */
 
 #endif /* _TRACKPOINT_H */