diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index 079816e6b23b..454b96112f03 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
  * Copyright (C) 2005-2008 Johannes Berg (johannes@sipsolutions.net)
- * Copyright (C) 2005      Stelian Pop (stelian@popies.net)
+ * Copyright (C) 2005-2008 Stelian Pop (stelian@popies.net)
  * Copyright (C) 2005      Frank Arnold (frank@scirocco-5v-turbo.de)
  * Copyright (C) 2005      Peter Osterlund (petero2@telia.com)
  * Copyright (C) 2005      Michael Hanselmann (linux-kernel@hansmi.ch)
@@ -35,16 +35,74 @@
 #include <linux/module.h>
 #include <linux/usb/input.h>
 
-/* Type of touchpad */
-enum atp_touchpad_type {
-	ATP_FOUNTAIN,
-	ATP_GEYSER1,
-	ATP_GEYSER2,
-	ATP_GEYSER3,
-	ATP_GEYSER4
+/*
+ * Note: We try to keep the touchpad aspect ratio while still doing only
+ * simple arithmetics:
+ *	0 <= x <= (xsensors - 1) * xfact
+ *	0 <= y <= (ysensors - 1) * yfact
+ */
+struct atp_info {
+	int xsensors;				/* number of X sensors */
+	int xsensors_17;			/* 17" models have more sensors */
+	int ysensors;				/* number of Y sensors */
+	int xfact;				/* X multiplication factor */
+	int yfact;				/* Y multiplication factor */
+	int datalen;				/* size of USB transfers */
+	void (*callback)(struct urb *);		/* callback function */
 };
 
-#define ATP_DEVICE(prod, type)					\
+static void atp_complete_geyser_1_2(struct urb *urb);
+static void atp_complete_geyser_3_4(struct urb *urb);
+
+static const struct atp_info fountain_info = {
+	.xsensors	= 16,
+	.xsensors_17	= 26,
+	.ysensors	= 16,
+	.xfact		= 64,
+	.yfact		= 43,
+	.datalen	= 81,
+	.callback	= atp_complete_geyser_1_2,
+};
+
+static const struct atp_info geyser1_info = {
+	.xsensors	= 16,
+	.xsensors_17	= 26,
+	.ysensors	= 16,
+	.xfact		= 64,
+	.yfact		= 43,
+	.datalen	= 81,
+	.callback	= atp_complete_geyser_1_2,
+};
+
+static const struct atp_info geyser2_info = {
+	.xsensors	= 15,
+	.xsensors_17	= 20,
+	.ysensors	= 9,
+	.xfact		= 64,
+	.yfact		= 43,
+	.datalen	= 64,
+	.callback	= atp_complete_geyser_1_2,
+};
+
+static const struct atp_info geyser3_info = {
+	.xsensors	= 20,
+	.ysensors	= 10,
+	.xfact		= 64,
+	.yfact		= 64,
+	.datalen	= 64,
+	.callback	= atp_complete_geyser_3_4,
+};
+
+static const struct atp_info geyser4_info = {
+	.xsensors	= 20,
+	.ysensors	= 10,
+	.xfact		= 64,
+	.yfact		= 64,
+	.datalen	= 64,
+	.callback	= atp_complete_geyser_3_4,
+};
+
+#define ATP_DEVICE(prod, info)					\
 {								\
 	.match_flags = USB_DEVICE_ID_MATCH_DEVICE |		\
 		       USB_DEVICE_ID_MATCH_INT_CLASS |		\
@@ -53,7 +111,7 @@ enum atp_touchpad_type {
 	.idProduct = (prod),					\
 	.bInterfaceClass = 0x03,				\
 	.bInterfaceProtocol = 0x02,				\
-	.driver_info = ATP_ ## type,				\
+	.driver_info = (unsigned long) &info,			\
 }
 
 /*
@@ -62,43 +120,39 @@ enum atp_touchpad_type {
  *  According to Info.plist Geyser IV is the same as Geyser III.)
  */
 
-static struct usb_device_id atp_table [] = {
+static struct usb_device_id atp_table[] = {
 	/* PowerBooks Feb 2005, iBooks G4 */
-	ATP_DEVICE(0x020e, FOUNTAIN),	/* FOUNTAIN ANSI */
-	ATP_DEVICE(0x020f, FOUNTAIN),	/* FOUNTAIN ISO */
-	ATP_DEVICE(0x030a, FOUNTAIN),	/* FOUNTAIN TP ONLY */
-	ATP_DEVICE(0x030b, GEYSER1),	/* GEYSER 1 TP ONLY */
+	ATP_DEVICE(0x020e, fountain_info),	/* FOUNTAIN ANSI */
+	ATP_DEVICE(0x020f, fountain_info),	/* FOUNTAIN ISO */
+	ATP_DEVICE(0x030a, fountain_info),	/* FOUNTAIN TP ONLY */
+	ATP_DEVICE(0x030b, geyser1_info),	/* GEYSER 1 TP ONLY */
 
 	/* PowerBooks Oct 2005 */
-	ATP_DEVICE(0x0214, GEYSER2),	/* GEYSER 2 ANSI */
-	ATP_DEVICE(0x0215, GEYSER2),	/* GEYSER 2 ISO */
-	ATP_DEVICE(0x0216, GEYSER2),	/* GEYSER 2 JIS */
+	ATP_DEVICE(0x0214, geyser2_info),	/* GEYSER 2 ANSI */
+	ATP_DEVICE(0x0215, geyser2_info),	/* GEYSER 2 ISO */
+	ATP_DEVICE(0x0216, geyser2_info),	/* GEYSER 2 JIS */
 
 	/* Core Duo MacBook & MacBook Pro */
-	ATP_DEVICE(0x0217, GEYSER3),	/* GEYSER 3 ANSI */
-	ATP_DEVICE(0x0218, GEYSER3),	/* GEYSER 3 ISO */
-	ATP_DEVICE(0x0219, GEYSER3),	/* GEYSER 3 JIS */
+	ATP_DEVICE(0x0217, geyser3_info),	/* GEYSER 3 ANSI */
+	ATP_DEVICE(0x0218, geyser3_info),	/* GEYSER 3 ISO */
+	ATP_DEVICE(0x0219, geyser3_info),	/* GEYSER 3 JIS */
 
 	/* Core2 Duo MacBook & MacBook Pro */
-	ATP_DEVICE(0x021a, GEYSER4),	/* GEYSER 4 ANSI */
-	ATP_DEVICE(0x021b, GEYSER4),	/* GEYSER 4 ISO */
-	ATP_DEVICE(0x021c, GEYSER4),	/* GEYSER 4 JIS */
+	ATP_DEVICE(0x021a, geyser4_info),	/* GEYSER 4 ANSI */
+	ATP_DEVICE(0x021b, geyser4_info),	/* GEYSER 4 ISO */
+	ATP_DEVICE(0x021c, geyser4_info),	/* GEYSER 4 JIS */
 
 	/* Core2 Duo MacBook3,1 */
-	ATP_DEVICE(0x0229, GEYSER4),	/* GEYSER 4 HF ANSI */
-	ATP_DEVICE(0x022a, GEYSER4),	/* GEYSER 4 HF ISO */
-	ATP_DEVICE(0x022b, GEYSER4),	/* GEYSER 4 HF JIS */
+	ATP_DEVICE(0x0229, geyser4_info),	/* GEYSER 4 HF ANSI */
+	ATP_DEVICE(0x022a, geyser4_info),	/* GEYSER 4 HF ISO */
+	ATP_DEVICE(0x022b, geyser4_info),	/* GEYSER 4 HF JIS */
 
 	/* Terminating entry */
 	{ }
 };
 MODULE_DEVICE_TABLE(usb, atp_table);
 
-/*
- * number of sensors. Note that only 16 instead of 26 X (horizontal)
- * sensors exist on 12" and 15" PowerBooks. All models have 16 Y
- * (vertical) sensors.
- */
+/* maximum number of sensors */
 #define ATP_XSENSORS	26
 #define ATP_YSENSORS	16
 
@@ -107,21 +161,6 @@ MODULE_DEVICE_TABLE(usb, atp_table);
 
 /* maximum pressure this driver will report */
 #define ATP_PRESSURE	300
-/*
- * multiplication factor for the X and Y coordinates.
- * We try to keep the touchpad aspect ratio while still doing only simple
- * arithmetics.
- * The factors below give coordinates like:
- *
- *      0 <= x <  960 on 12" and 15" Powerbooks
- *      0 <= x < 1600 on 17" Powerbooks and 17" MacBook Pro
- *      0 <= x < 1216 on MacBooks and 15" MacBook Pro
- *
- *      0 <= y <  646 on all Powerbooks
- *      0 <= y <  774 on all MacBooks
- */
-#define ATP_XFACT	64
-#define ATP_YFACT	43
 
 /*
  * Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
@@ -159,7 +198,7 @@ struct atp {
 	struct urb		*urb;		/* usb request block */
 	u8			*data;		/* transferred data */
 	struct input_dev	*input;		/* input dev */
-	enum atp_touchpad_type	type;		/* type of touchpad */
+	const struct atp_info	*info;		/* touchpad model */
 	bool			open;
 	bool			valid;		/* are the samples valid? */
 	bool			size_detect_done;
@@ -169,7 +208,6 @@ struct atp {
 	signed char		xy_cur[ATP_XSENSORS + ATP_YSENSORS];
 	signed char		xy_old[ATP_XSENSORS + ATP_YSENSORS];
 	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
-	int			datalen;	/* size of USB transfer */
 	int			idlecount;	/* number of empty packets */
 	struct work_struct	work;
 };
@@ -359,7 +397,7 @@ static int atp_status_check(struct urb *urb)
 		if (!dev->overflow_warned) {
 			printk(KERN_WARNING "appletouch: OVERFLOW with data "
 				"length %d, actual length is %d\n",
-				dev->datalen, dev->urb->actual_length);
+				dev->info->datalen, dev->urb->actual_length);
 			dev->overflow_warned = true;
 		}
 	case -ECONNRESET:
@@ -377,7 +415,7 @@ static int atp_status_check(struct urb *urb)
 	}
 
 	/* drop incomplete datasets */
-	if (dev->urb->actual_length != dev->datalen) {
+	if (dev->urb->actual_length != dev->info->datalen) {
 		dprintk("appletouch: incomplete data package"
 			" (first byte: %d, length: %d).\n",
 			dev->data[0], dev->urb->actual_length);
@@ -387,6 +425,25 @@ static int atp_status_check(struct urb *urb)
 	return ATP_URB_STATUS_SUCCESS;
 }
 
+static void atp_detect_size(struct atp *dev)
+{
+	int i;
+
+	/* 17" Powerbooks have extra X sensors */
+	for (i = dev->info->xsensors; i < ATP_XSENSORS; i++) {
+		if (dev->xy_cur[i]) {
+
+			printk(KERN_INFO "appletouch: 17\" model detected.\n");
+
+			input_set_abs_params(dev->input, ABS_X, 0,
+					     (dev->info->xsensors_17 - 1) *
+							dev->info->xfact - 1,
+					     ATP_FUZZ, 0);
+			break;
+		}
+	}
+}
+
 /*
  * USB interrupt callback functions
  */
@@ -407,7 +464,7 @@ static void atp_complete_geyser_1_2(struct urb *urb)
 		goto exit;
 
 	/* reorder the sensors values */
-	if (dev->type == ATP_GEYSER2) {
+	if (dev->info == &geyser2_info) {
 		memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
 
 		/*
@@ -437,8 +494,8 @@ static void atp_complete_geyser_1_2(struct urb *urb)
 				dev->xy_cur[i + 24] = dev->data[5 * i + 44];
 
 			/* Y values */
-			dev->xy_cur[i + 26] = dev->data[5 * i +  1];
-			dev->xy_cur[i + 34] = dev->data[5 * i +  3];
+			dev->xy_cur[ATP_XSENSORS + i] = dev->data[5 * i +  1];
+			dev->xy_cur[ATP_XSENSORS + i + 8] = dev->data[5 * i + 3];
 		}
 	}
 
@@ -453,32 +510,8 @@ static void atp_complete_geyser_1_2(struct urb *urb)
 		memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
 
 		/* Perform size detection, if not done already */
-		if (!dev->size_detect_done) {
-
-			/* 17" Powerbooks have extra X sensors */
-			for (i = (dev->type == ATP_GEYSER2 ? 15 : 16);
-			     i < ATP_XSENSORS; i++) {
-				if (!dev->xy_cur[i])
-					continue;
-
-				printk(KERN_INFO
-					"appletouch: 17\" model detected.\n");
-
-				if (dev->type == ATP_GEYSER2)
-					input_set_abs_params(dev->input, ABS_X,
-							     0,
-							     (20 - 1) *
-							     ATP_XFACT - 1,
-							     ATP_FUZZ, 0);
-				else
-					input_set_abs_params(dev->input, ABS_X,
-							     0,
-							     (26 - 1) *
-							     ATP_XFACT - 1,
-							     ATP_FUZZ, 0);
-				break;
-			}
-
+		if (unlikely(!dev->size_detect_done)) {
+			atp_detect_size(dev);
 			dev->size_detect_done = 1;
 			goto exit;
 		}
@@ -499,10 +532,10 @@ static void atp_complete_geyser_1_2(struct urb *urb)
 	dbg_dump("accumulator", dev->xy_acc);
 
 	x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
-			      ATP_XFACT, &x_z, &x_f);
+			      dev->info->xfact, &x_z, &x_f);
 	y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
-			      ATP_YFACT, &y_z, &y_f);
-	key = dev->data[dev->datalen - 1] & ATP_STATUS_BUTTON;
+			      dev->info->yfact, &y_z, &y_f);
+	key = dev->data[dev->info->datalen - 1] & ATP_STATUS_BUTTON;
 
 	if (x && y) {
 		if (dev->x_old != -1) {
@@ -583,7 +616,7 @@ static void atp_complete_geyser_3_4(struct urb *urb)
 	dbg_dump("sample", dev->xy_cur);
 
 	/* Just update the base values (i.e. touchpad in untouched state) */
-	if (dev->data[dev->datalen - 1] & ATP_STATUS_BASE_UPDATE) {
+	if (dev->data[dev->info->datalen - 1] & ATP_STATUS_BASE_UPDATE) {
 
 		dprintk(KERN_DEBUG "appletouch: updated base values\n");
 
@@ -610,10 +643,10 @@ static void atp_complete_geyser_3_4(struct urb *urb)
 	dbg_dump("accumulator", dev->xy_acc);
 
 	x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
-			      ATP_XFACT, &x_z, &x_f);
+			      dev->info->xfact, &x_z, &x_f);
 	y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
-			      ATP_YFACT, &y_z, &y_f);
-	key = dev->data[dev->datalen - 1] & ATP_STATUS_BUTTON;
+			      dev->info->yfact, &y_z, &y_f);
+	key = dev->data[dev->info->datalen - 1] & ATP_STATUS_BUTTON;
 
 	if (x && y) {
 		if (dev->x_old != -1) {
@@ -705,7 +738,7 @@ static int atp_handle_geyser(struct atp *dev)
 {
 	struct usb_device *udev = dev->udev;
 
-	if (dev->type != ATP_FOUNTAIN) {
+	if (dev->info != &fountain_info) {
 		/* switch to raw sensor mode */
 		if (atp_geyser_init(udev))
 			return -EIO;
@@ -726,6 +759,7 @@ static int atp_probe(struct usb_interface *iface,
 	struct usb_endpoint_descriptor *endpoint;
 	int int_in_endpointAddr = 0;
 	int i, error = -ENOMEM;
+	const struct atp_info *info = (const struct atp_info *)id->driver_info;
 
 	/* set up the endpoint information */
 	/* use only the first interrupt-in endpoint */
@@ -753,35 +787,22 @@ static int atp_probe(struct usb_interface *iface,
 
 	dev->udev = udev;
 	dev->input = input_dev;
-	dev->type = id->driver_info;
+	dev->info = info;
 	dev->overflow_warned = false;
-	if (dev->type == ATP_FOUNTAIN || dev->type == ATP_GEYSER1)
-		dev->datalen = 81;
-	else
-		dev->datalen = 64;
 
 	dev->urb = usb_alloc_urb(0, GFP_KERNEL);
 	if (!dev->urb)
 		goto err_free_devs;
 
-	dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
+	dev->data = usb_buffer_alloc(dev->udev, dev->info->datalen, GFP_KERNEL,
 				     &dev->urb->transfer_dma);
 	if (!dev->data)
 		goto err_free_urb;
 
-	/* Select the USB complete (callback) function */
-	if (dev->type == ATP_FOUNTAIN ||
-	    dev->type == ATP_GEYSER1 ||
-	    dev->type == ATP_GEYSER2)
-		usb_fill_int_urb(dev->urb, udev,
-				 usb_rcvintpipe(udev, int_in_endpointAddr),
-				 dev->data, dev->datalen,
-				 atp_complete_geyser_1_2, dev, 1);
-	else
-		usb_fill_int_urb(dev->urb, udev,
-				 usb_rcvintpipe(udev, int_in_endpointAddr),
-				 dev->data, dev->datalen,
-				 atp_complete_geyser_3_4, dev, 1);
+	usb_fill_int_urb(dev->urb, udev,
+			 usb_rcvintpipe(udev, int_in_endpointAddr),
+			 dev->data, dev->info->datalen,
+			 dev->info->callback, dev, 1);
 
 	error = atp_handle_geyser(dev);
 	if (error)
@@ -802,35 +823,12 @@ static int atp_probe(struct usb_interface *iface,
 
 	set_bit(EV_ABS, input_dev->evbit);
 
-	if (dev->type == ATP_GEYSER3 || dev->type == ATP_GEYSER4) {
-		/*
-		 * MacBook have 20 X sensors, 10 Y sensors
-		 */
-		input_set_abs_params(input_dev, ABS_X, 0,
-				     ((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
-		input_set_abs_params(input_dev, ABS_Y, 0,
-				     ((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
-	} else if (dev->type == ATP_GEYSER2) {
-		/*
-		 * Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
-		 * later.
-		 */
-		input_set_abs_params(input_dev, ABS_X, 0,
-				     ((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
-		input_set_abs_params(input_dev, ABS_Y, 0,
-				     ((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
-	} else {
-		/*
-		 * 12" and 15" Powerbooks only have 16 x sensors,
-		 * 17" models are detected later.
-		 */
-		input_set_abs_params(input_dev, ABS_X, 0,
-				     (16 - 1) * ATP_XFACT - 1,
-				     ATP_FUZZ, 0);
-		input_set_abs_params(input_dev, ABS_Y, 0,
-				     (ATP_YSENSORS - 1) * ATP_YFACT - 1,
-				     ATP_FUZZ, 0);
-	}
+	input_set_abs_params(input_dev, ABS_X, 0,
+			     (dev->info->xsensors - 1) * dev->info->xfact - 1,
+			     ATP_FUZZ, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0,
+			     (dev->info->ysensors - 1) * dev->info->yfact - 1,
+			     ATP_FUZZ, 0);
 	input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
 
 	set_bit(EV_KEY, input_dev->evbit);
@@ -852,7 +850,7 @@ static int atp_probe(struct usb_interface *iface,
 	return 0;
 
  err_free_buffer:
-	usb_buffer_free(dev->udev, dev->datalen,
+	usb_buffer_free(dev->udev, dev->info->datalen,
 			dev->data, dev->urb->transfer_dma);
  err_free_urb:
 	usb_free_urb(dev->urb);
@@ -871,7 +869,7 @@ static void atp_disconnect(struct usb_interface *iface)
 	if (dev) {
 		usb_kill_urb(dev->urb);
 		input_unregister_device(dev->input);
-		usb_buffer_free(dev->udev, dev->datalen,
+		usb_buffer_free(dev->udev, dev->info->datalen,
 				dev->data, dev->urb->transfer_dma);
 		usb_free_urb(dev->urb);
 		kfree(dev);