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>

10 files changed, 195 insertions, 59 deletions

diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 35d998c3e578..d0d074457936 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -37,6 +37,65 @@ config MOUSE_PS2
           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
@@ -118,7 +177,7 @@ config MOUSE_VSXXXAA
           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
diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
index 6751179baeb8..83477d5c7664 100644
--- a/drivers/input/mouse/Makefile
+++ b/drivers/input/mouse/Makefile
@@ -14,5 +14,10 @@ obj-$(CONFIG_MOUSE_SERIAL)	+= sermouse.o
 obj-$(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
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index 69db7325a494..f85ac40ec941 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -12,9 +12,6 @@
 #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;
@@ -29,4 +26,18 @@ struct alps_data {
         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
diff --git a/drivers/input/mouse/lifebook.h b/drivers/input/mouse/lifebook.h
index be1c0943825d..c1647cf036c2 100644
--- a/drivers/input/mouse/lifebook.h
+++ b/drivers/input/mouse/lifebook.h
@@ -11,7 +11,18 @@
 #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
diff --git a/drivers/input/mouse/logips2pp.h b/drivers/input/mouse/logips2pp.h
index 64a8ec52ea6d..6e5712525fd6 100644
--- a/drivers/input/mouse/logips2pp.h
+++ b/drivers/input/mouse/logips2pp.h
@@ -11,6 +11,13 @@
 #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
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 33a3251e0766..e6c9e7bb1f99 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -570,7 +570,9 @@ static int psmouse_extensions(struct psmouse *psmouse,
                 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;
@@ -661,12 +663,14 @@ static const struct psmouse_protocol psmouse_protocols[] = {
                 .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",
@@ -693,6 +697,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
                 .maxproto       = 1,
                 .detect         = im_explorer_detect,
         },
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
         {
                 .type           = PSMOUSE_SYNAPTICS,
                 .name           = "SynPS/2",
@@ -700,6 +705,8 @@ static const struct psmouse_protocol psmouse_protocols[] = {
                 .detect         = synaptics_detect,
                 .init           = synaptics_init,
         },
+#endif
+#ifdef CONFIG_MOUSE_PS2_ALPS
         {
                 .type           = PSMOUSE_ALPS,
                 .name           = "AlpsPS/2",
@@ -707,24 +714,31 @@ static const struct psmouse_protocol psmouse_protocols[] = {
                 .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",
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 */
 
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index 68fff1dcd7de..02aa4cf7bc77 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -9,10 +9,6 @@
 #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
@@ -62,9 +58,9 @@ extern void synaptics_reset(struct psmouse *psmouse);
 #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 */
@@ -98,8 +94,8 @@ struct synaptics_hw_state {
 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 */
@@ -107,4 +103,8 @@ struct synaptics_data {
         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 */
diff --git a/drivers/input/mouse/touchkit_ps2.h b/drivers/input/mouse/touchkit_ps2.h
index 3f03fbcaf8f0..61e9dfd8419f 100644
--- a/drivers/input/mouse/touchkit_ps2.h
+++ b/drivers/input/mouse/touchkit_ps2.h
@@ -12,6 +12,13 @@
 #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
diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h
index 050298b1a09d..c10a6e7d0101 100644
--- a/drivers/input/mouse/trackpoint.h
+++ b/drivers/input/mouse/trackpoint.h
@@ -142,6 +142,13 @@ struct trackpoint_data
         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 */