input: Add Synaptics touchpad absolute mode support.

drivers/input/mouse/Kconfig

@@ -28,6 +28,19 @@ config MOUSE_PS2
 	  The module will be called psmouse. If you want to compile it as a
 	  module, say M here and read <file:Documentation/modules.txt>.
 
+config MOUSE_PS2_SYNAPTICS
+	bool "Synaptics TouchPad"
+	default n
+	depends on INPUT && INPUT_MOUSE && SERIO && MOUSE_PS2
+	---help---
+	  Say Y here if you have a Synaptics TouchPad connected to your system.
+	  This touchpad is found on many modern laptop computers.
+	  Note that you also need a user space driver to interpret the data
+	  generated by the kernel. A compatible driver for XFree86 is available
+	  from http://...
+
+	  If unsure, say Y.
+
 config MOUSE_SERIAL
 	tristate "Serial mouse"
 	depends on INPUT && INPUT_MOUSE && SERIO

drivers/input/mouse/Makefile

@@ -13,3 +13,8 @@ obj-$(CONFIG_MOUSE_PC110PAD)	+= pc110pad.o
 obj-$(CONFIG_MOUSE_PC9800)	+= 98busmouse.o
 obj-$(CONFIG_MOUSE_PS2)		+= psmouse.o
 obj-$(CONFIG_MOUSE_SERIAL)	+= sermouse.o
+
+psmouse-objs  := psmouse-base.o
+ifeq ($(CONFIG_MOUSE_PS2_SYNAPTICS),y)
+        psmouse-objs += synaptics.o
+endif

drivers/input/mouse/psmouse.c → drivers/input/mouse/psmouse-base.c

@@ -17,6 +17,8 @@
 #include <linux/input.h>
 #include <linux/serio.h>
 #include <linux/init.h>
+#include "psmouse.h"
+#include "synaptics.h"
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
 MODULE_DESCRIPTION("PS/2 mouse driver");
@@ -25,48 +27,7 @@ MODULE_LICENSE("GPL");
 
 static int psmouse_noext;
 
-#define PSMOUSE_CMD_SETSCALE11	0x00e6
-#define PSMOUSE_CMD_SETRES	0x10e8
-#define PSMOUSE_CMD_GETINFO	0x03e9
-#define PSMOUSE_CMD_SETSTREAM	0x00ea
-#define PSMOUSE_CMD_POLL	0x03eb	
-#define PSMOUSE_CMD_GETID	0x02f2
-#define PSMOUSE_CMD_SETRATE	0x10f3
-#define PSMOUSE_CMD_ENABLE	0x00f4
-#define PSMOUSE_CMD_RESET_DIS	0x00f6
-#define PSMOUSE_CMD_RESET_BAT	0x02ff
-
-#define PSMOUSE_RET_BAT		0xaa
-#define PSMOUSE_RET_ACK		0xfa
-#define PSMOUSE_RET_NAK		0xfe
-
-struct psmouse {
-	struct input_dev dev;
-	struct serio *serio;
-	char *vendor;
-	char *name;
-	unsigned char cmdbuf[8];
-	unsigned char packet[8];
-	unsigned char cmdcnt;
-	unsigned char pktcnt;
-	unsigned char type;
-	unsigned char model;
-	unsigned long last;
-	char acking;
-	volatile char ack;
-	char error;
-	char devname[64];
-	char phys[32];
-};
-
-#define PSMOUSE_PS2	1
-#define PSMOUSE_PS2PP	2
-#define PSMOUSE_PS2TPP	3
-#define PSMOUSE_GENPS	4
-#define PSMOUSE_IMPS	5
-#define PSMOUSE_IMEX	6
-
-static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "PS2T++", "GenPS/2", "ImPS/2", "ImExPS/2" };
+static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "PS2T++", "GenPS/2", "ImPS/2", "ImExPS/2", "Synaptics"};
 
 /*
  * psmouse_process_packet() anlyzes the PS/2 mouse packet contents and
@@ -209,6 +170,16 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
 		goto out;
 	}
 
+	if (psmouse->pktcnt == 1 && psmouse->type == PSMOUSE_SYNAPTICS) {
+		/*
+		 * The synaptics driver has its own resync logic,
+		 * so it needs to receive all bytes one at a time.
+		 */
+		synaptics_process_byte(psmouse, regs);
+		psmouse->pktcnt = 0;
+		goto out;
+	}
+
 	if (psmouse->pktcnt == 1 && psmouse->packet[0] == PSMOUSE_RET_BAT) {
 		serio_rescan(serio);
 		goto out;
@@ -244,7 +215,7 @@ static int psmouse_sendbyte(struct psmouse *psmouse, unsigned char byte)
  * then waits for the response and puts it in the param array.
  */
 
-static int psmouse_command(struct psmouse *psmouse, unsigned char *param, int command)
+int psmouse_command(struct psmouse *psmouse, unsigned char *param, int command)
 {
 	int timeout = 500000; /* 500 msec */
 	int send = (command >> 12) & 0xf;
@@ -343,12 +314,12 @@ static int psmouse_extensions(struct psmouse *psmouse)
        psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO);
 
        if (param[1] == 0x47) {
-               /* We could do more here. But it's sufficient just
-                  to stop the subsequent probes from screwing the
-                  thing up. */
-               psmouse->vendor = "Synaptics";
-               psmouse->name = "TouchPad";
-               return PSMOUSE_PS2;
+		psmouse->vendor = "Synaptics";
+		psmouse->name = "TouchPad";
+		if (!synaptics_init(psmouse))
+			return PSMOUSE_SYNAPTICS;
+		else
+			return PSMOUSE_PS2;
        }
 
 /*
@@ -598,6 +569,7 @@ static void psmouse_disconnect(struct serio *serio)
 	struct psmouse *psmouse = serio->private;
 	input_unregister_device(&psmouse->dev);
 	serio_close(serio);
+	synaptics_disconnect(psmouse);
 	kfree(psmouse);
 }
 

drivers/input/mouse/psmouse.h

+#ifndef _PSMOUSE_H
+#define _PSMOUSE_H
+
+#define PSMOUSE_CMD_SETSCALE11	0x00e6
+#define PSMOUSE_CMD_SETRES	0x10e8
+#define PSMOUSE_CMD_GETINFO	0x03e9
+#define PSMOUSE_CMD_SETSTREAM	0x00ea
+#define PSMOUSE_CMD_POLL	0x03eb	
+#define PSMOUSE_CMD_GETID	0x02f2
+#define PSMOUSE_CMD_SETRATE	0x10f3
+#define PSMOUSE_CMD_ENABLE	0x00f4
+#define PSMOUSE_CMD_RESET_DIS	0x00f6
+#define PSMOUSE_CMD_RESET_BAT	0x02ff
+
+#define PSMOUSE_RET_BAT		0xaa
+#define PSMOUSE_RET_ACK		0xfa
+#define PSMOUSE_RET_NAK		0xfe
+
+struct psmouse {
+	void *private;
+	struct input_dev dev;
+	struct serio *serio;
+	char *vendor;
+	char *name;
+	unsigned char cmdbuf[8];
+	unsigned char packet[8];
+	unsigned char cmdcnt;
+	unsigned char pktcnt;
+	unsigned char type;
+	unsigned char model;
+	unsigned long last;
+	char acking;
+	volatile char ack;
+	char error;
+	char devname[64];
+	char phys[32];
+};
+
+#define PSMOUSE_PS2	1
+#define PSMOUSE_PS2PP	2
+#define PSMOUSE_PS2TPP	3
+#define PSMOUSE_GENPS	4
+#define PSMOUSE_IMPS	5
+#define PSMOUSE_IMEX	6
+#define PSMOUSE_SYNAPTICS 7
+
+int psmouse_command(struct psmouse *psmouse, unsigned char *param, int command);
+
+#endif /* _PSMOUSE_H */

drivers/input/mouse/synaptics.h

+/*
+ * Synaptics TouchPad PS/2 mouse driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef _SYNAPTICS_H
+#define _SYNAPTICS_H
+
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+
+extern void synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs);
+extern int synaptics_init(struct psmouse *psmouse);
+extern void synaptics_disconnect(struct psmouse *psmouse);
+
+#else
+
+static inline void synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs) {}
+static inline int synaptics_init(struct psmouse *psmouse) { return -1; }
+static inline void synaptics_disconnect(struct psmouse *psmouse) {}
+
+#endif
+
+
+/* synaptics queries */
+#define SYN_QUE_IDENTIFY		0x00
+#define SYN_QUE_MODES			0x01
+#define SYN_QUE_CAPABILITIES		0x02
+#define SYN_QUE_MODEL			0x03
+#define SYN_QUE_SERIAL_NUMBER_PREFIX	0x06
+#define SYN_QUE_SERIAL_NUMBER_SUFFIX	0x07
+#define SYN_QUE_RESOLUTION		0x08
+
+/* synatics modes */
+#define SYN_BIT_ABSOLUTE_MODE		(1 << 7)
+#define SYN_BIT_HIGH_RATE		(1 << 6)
+#define SYN_BIT_SLEEP_MODE		(1 << 3)
+#define SYN_BIT_DISABLE_GESTURE		(1 << 2)
+#define SYN_BIT_W_MODE			(1 << 0)
+
+/* synaptics model ID bits */
+#define SYN_MODEL_ROT180(m)		((m) & (1 << 23))
+#define SYN_MODEL_PORTRAIT(m)		((m) & (1 << 22))
+#define SYN_MODEL_SENSOR(m)		(((m) >> 16) & 0x3f)
+#define SYN_MODEL_HARDWARE(m)		(((m) >> 9) & 0x7f)
+#define SYN_MODEL_NEWABS(m)		((m) & (1 << 7))
+#define SYN_MODEL_PEN(m)		((m) & (1 << 6))
+#define SYN_MODEL_SIMPLIC(m)		((m) & (1 << 5))
+#define SYN_MODEL_GEOMETRY(m)		((m) & 0x0f)
+
+/* synaptics capability bits */
+#define SYN_CAP_EXTENDED(c)		((c) & (1 << 23))
+#define SYN_CAP_SLEEP(c)		((c) & (1 << 4))
+#define SYN_CAP_FOUR_BUTTON(c)		((c) & (1 << 3))
+#define SYN_CAP_MULTIFINGER(c)		((c) & (1 << 1))
+#define SYN_CAP_PALMDETECT(c)		((c) & (1 << 0))
+#define SYN_CAP_VALID(c)		((((c) & 0x00ff00) >> 8) == 0x47)
+
+/* synaptics modes query bits */
+#define SYN_MODE_ABSOLUTE(m)		((m) & (1 << 7))
+#define SYN_MODE_RATE(m)		((m) & (1 << 6))
+#define SYN_MODE_BAUD_SLEEP(m)		((m) & (1 << 3))
+#define SYN_MODE_DISABLE_GESTURE(m)	((m) & (1 << 2))
+#define SYN_MODE_PACKSIZE(m)		((m) & (1 << 1))
+#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_IS_SYNAPTICS(i)		((((i) >> 8) & 0xff) == 0x47)
+
+/*
+ * A structure to describe the state of the touchpad hardware (buttons and pad)
+ */
+
+struct synaptics_hw_state {
+	int x;
+	int y;
+	int z;
+	int w;
+	int left;
+	int right;
+	int up;
+	int down;
+};
+
+struct synaptics_data {
+	/* Data read from the touchpad */
+	unsigned long int model_id;		/* Model-ID */
+	unsigned long int capabilities; 	/* Capabilities */
+	unsigned long int identity;		/* Identification */
+
+	/* Data for normal processing */
+	unsigned char proto_buf[6];		/* Buffer for Packet */
+	unsigned char last_byte;		/* last received byte */
+	int inSync;				/* Packets in sync */
+	int proto_buf_tail;
+
+	int old_w;				/* Previous w value */
+};
+
+#endif /* _SYNAPTICS_H */

include/linux/input.h

@@ -530,6 +530,7 @@ struct input_absinfo {
 
 #define MSC_SERIAL		0x00
 #define MSC_PULSELED		0x01
+#define MSC_GESTURE		0x02
 #define MSC_MAX			0x07
 
 /*