1 files changed, 706 insertions, 0 deletions

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
new file mode 100644
index 00000000000..e3215267db1
--- /dev/null
+++ b/drivers/input/mouse/appletouch.c
@@ -0,0 +1,706 @@
+/*
+ * Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
+ *
+ * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2005      Johannes Berg (johannes@sipsolutions.net)
+ * Copyright (C) 2005      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)
+ * Copyright (C) 2006      Nicolas Boichat (nicolas@boichat.ch)
+ *
+ * Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb/input.h>
+
+/* Apple has powerbooks which have the keyboard with different Product IDs */
+#define APPLE_VENDOR_ID		0x05AC
+
+/* These names come from Info.plist in AppleUSBTrackpad.kext */
+#define FOUNTAIN_ANSI_PRODUCT_ID	0x020E
+#define FOUNTAIN_ISO_PRODUCT_ID		0x020F
+
+#define FOUNTAIN_TP_ONLY_PRODUCT_ID	0x030A
+
+#define GEYSER1_TP_ONLY_PRODUCT_ID	0x030B
+
+#define GEYSER_ANSI_PRODUCT_ID		0x0214
+#define GEYSER_ISO_PRODUCT_ID		0x0215
+#define GEYSER_JIS_PRODUCT_ID		0x0216
+
+/* MacBook devices */
+#define GEYSER3_ANSI_PRODUCT_ID		0x0217
+#define GEYSER3_ISO_PRODUCT_ID		0x0218
+#define GEYSER3_JIS_PRODUCT_ID		0x0219
+
+/*
+ * Geyser IV: same as Geyser III according to Info.plist in AppleUSBTrackpad.kext
+ * -> same IOClass (AppleUSBGrIIITrackpad), same acceleration tables
+ */
+#define GEYSER4_ANSI_PRODUCT_ID	0x021A
+#define GEYSER4_ISO_PRODUCT_ID	0x021B
+#define GEYSER4_JIS_PRODUCT_ID	0x021C
+
+#define ATP_DEVICE(prod)					\
+	.match_flags = USB_DEVICE_ID_MATCH_DEVICE |		\
+		       USB_DEVICE_ID_MATCH_INT_CLASS |		\
+		       USB_DEVICE_ID_MATCH_INT_PROTOCOL,	\
+	.idVendor = APPLE_VENDOR_ID,				\
+	.idProduct = (prod),					\
+	.bInterfaceClass = 0x03,				\
+	.bInterfaceProtocol = 0x02
+
+/* table of devices that work with this driver */
+static struct usb_device_id atp_table [] = {
+	{ ATP_DEVICE(FOUNTAIN_ANSI_PRODUCT_ID) },
+	{ ATP_DEVICE(FOUNTAIN_ISO_PRODUCT_ID) },
+	{ ATP_DEVICE(FOUNTAIN_TP_ONLY_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER1_TP_ONLY_PRODUCT_ID) },
+
+	/* PowerBooks Oct 2005 */
+	{ ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },
+
+	/* Core Duo MacBook & MacBook Pro */
+	{ ATP_DEVICE(GEYSER3_ANSI_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER3_ISO_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER3_JIS_PRODUCT_ID) },
+
+	/* Core2 Duo MacBook & MacBook Pro */
+	{ ATP_DEVICE(GEYSER4_ANSI_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER4_ISO_PRODUCT_ID) },
+	{ ATP_DEVICE(GEYSER4_JIS_PRODUCT_ID) },
+
+	/* 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.
+ */
+#define ATP_XSENSORS	26
+#define ATP_YSENSORS	16
+
+/* amount of fuzz this touchpad generates */
+#define ATP_FUZZ	16
+
+/* 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
+ *	0 <= y <  646
+ */
+#define ATP_XFACT	64
+#define ATP_YFACT	43
+
+/*
+ * Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
+ * ignored.
+ */
+#define ATP_THRESHOLD	 5
+
+/* MacBook Pro (Geyser 3 & 4) initialization constants */
+#define ATP_GEYSER3_MODE_READ_REQUEST_ID 1
+#define ATP_GEYSER3_MODE_WRITE_REQUEST_ID 9
+#define ATP_GEYSER3_MODE_REQUEST_VALUE 0x300
+#define ATP_GEYSER3_MODE_REQUEST_INDEX 0
+#define ATP_GEYSER3_MODE_VENDOR_VALUE 0x04
+
+/* Structure to hold all of our device specific stuff */
+struct atp {
+	char			phys[64];
+	struct usb_device *	udev;		/* usb device */
+	struct urb *		urb;		/* usb request block */
+	signed char *		data;		/* transferred data */
+	int			open;		/* non-zero if opened */
+	struct input_dev	*input;		/* input dev */
+	int			valid;		/* are the sensors valid ? */
+	int			x_old;		/* last reported x/y, */
+	int			y_old;		/* used for smoothing */
+						/* current value of the sensors */
+	signed char		xy_cur[ATP_XSENSORS + ATP_YSENSORS];
+						/* last value of the sensors */
+	signed char		xy_old[ATP_XSENSORS + ATP_YSENSORS];
+						/* accumulated sensors */
+	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
+	int			overflowwarn;	/* overflow warning printed? */
+	int			datalen;	/* size of an USB urb transfer */
+};
+
+#define dbg_dump(msg, tab) \
+	if (debug > 1) {						\
+		int i;							\
+		printk("appletouch: %s %lld", msg, (long long)jiffies); \
+		for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++)	\
+			printk(" %02x", tab[i]);			\
+		printk("\n");						\
+	}
+
+#define dprintk(format, a...)						\
+	do {								\
+		if (debug) printk(format, ##a);				\
+	} while (0)
+
+MODULE_AUTHOR("Johannes Berg, Stelian Pop, Frank Arnold, Michael Hanselmann");
+MODULE_DESCRIPTION("Apple PowerBooks USB touchpad driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Make the threshold a module parameter
+ */
+static int threshold = ATP_THRESHOLD;
+module_param(threshold, int, 0644);
+MODULE_PARM_DESC(threshold, "Discards any change in data from a sensor (trackpad has hundreds of these sensors) less than this value");
+
+static int debug = 1;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Activate debugging output");
+
+/* Checks if the device a Geyser 2 (ANSI, ISO, JIS) */
+static inline int atp_is_geyser_2(struct atp *dev)
+{
+	u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
+
+	return (productId == GEYSER_ANSI_PRODUCT_ID) ||
+		(productId == GEYSER_ISO_PRODUCT_ID) ||
+		(productId == GEYSER_JIS_PRODUCT_ID);
+}
+
+static inline int atp_is_geyser_3(struct atp *dev)
+{
+	u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
+
+	return (productId == GEYSER3_ANSI_PRODUCT_ID) ||
+		(productId == GEYSER3_ISO_PRODUCT_ID) ||
+		(productId == GEYSER3_JIS_PRODUCT_ID) ||
+		(productId == GEYSER4_ANSI_PRODUCT_ID) ||
+		(productId == GEYSER4_ISO_PRODUCT_ID) ||
+		(productId == GEYSER4_JIS_PRODUCT_ID);
+}
+
+static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
+			     int *z, int *fingers)
+{
+	int i;
+	/* values to calculate mean */
+	int pcum = 0, psum = 0;
+	int is_increasing = 0;
+
+	*fingers = 0;
+
+	for (i = 0; i < nb_sensors; i++) {
+		if (xy_sensors[i] < threshold) {
+			if (is_increasing)
+				is_increasing = 0;
+
+			continue;
+		}
+
+		/*
+		 * Makes the finger detection more versatile.  For example,
+		 * two fingers with no gap will be detected.  Also, my
+		 * tests show it less likely to have intermittent loss
+		 * of multiple finger readings while moving around (scrolling).
+		 *
+		 * Changes the multiple finger detection to counting humps on
+		 * sensors (transitions from nonincreasing to increasing)
+		 * instead of counting transitions from low sensors (no
+		 * finger reading) to high sensors (finger above
+		 * sensor)
+		 *
+		 * - Jason Parekh <jasonparekh@gmail.com>
+		 */
+		if (i < 1 || (!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
+			(*fingers)++;
+			is_increasing = 1;
+		} else if (i > 0 && xy_sensors[i - 1] >= xy_sensors[i]) {
+			is_increasing = 0;
+		}
+
+		/*
+		 * Subtracts threshold so a high sensor that just passes the threshold
+		 * won't skew the calculated absolute coordinate.  Fixes an issue
+		 * where slowly moving the mouse would occassionaly jump a number of
+		 * pixels (let me restate--slowly moving the mouse makes this issue
+		 * most apparent).
+		 */
+		pcum += (xy_sensors[i] - threshold) * i;
+		psum += (xy_sensors[i] - threshold);
+	}
+
+	if (psum > 0) {
+		*z = psum;
+		return pcum * fact / psum;
+	}
+
+	return 0;
+}
+
+static inline void atp_report_fingers(struct input_dev *input, int fingers)
+{
+	input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
+	input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
+	input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
+}
+
+static void atp_complete(struct urb* urb)
+{
+	int x, y, x_z, y_z, x_f, y_f;
+	int retval, i, j;
+	struct atp *dev = urb->context;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -EOVERFLOW:
+		if(!dev->overflowwarn) {
+			printk("appletouch: OVERFLOW with data "
+				"length %d, actual length is %d\n",
+				dev->datalen, dev->urb->actual_length);
+			dev->overflowwarn = 1;
+		}
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* This urb is terminated, clean up */
+		dbg("%s - urb shutting down with status: %d",
+		    __FUNCTION__, urb->status);
+		return;
+	default:
+		dbg("%s - nonzero urb status received: %d",
+		    __FUNCTION__, urb->status);
+		goto exit;
+	}
+
+	/* drop incomplete datasets */
+	if (dev->urb->actual_length != dev->datalen) {
+		dprintk("appletouch: incomplete data package"
+			" (first byte: %d, length: %d).\n",
+			dev->data[0], dev->urb->actual_length);
+		goto exit;
+	}
+
+	/* reorder the sensors values */
+	if (atp_is_geyser_3(dev)) {
+		memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
+
+		/*
+		 * The values are laid out like this:
+		 * -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
+		 * '-' is an unused value.
+		 */
+
+		/* read X values */
+		for (i = 0, j = 19; i < 20; i += 2, j += 3) {
+			dev->xy_cur[i] = dev->data[j + 1];
+			dev->xy_cur[i + 1] = dev->data[j + 2];
+		}
+		/* read Y values */
+		for (i = 0, j = 1; i < 9; i += 2, j += 3) {
+			dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
+			dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
+		}
+	} else if (atp_is_geyser_2(dev)) {
+		memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
+
+		/*
+		 * The values are laid out like this:
+		 * Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
+		 * '-' is an unused value.
+		 */
+
+		/* read X values */
+		for (i = 0, j = 19; i < 20; i += 2, j += 3) {
+			dev->xy_cur[i] = dev->data[j];
+			dev->xy_cur[i + 1] = dev->data[j + 1];
+		}
+
+		/* read Y values */
+		for (i = 0, j = 1; i < 9; i += 2, j += 3) {
+			dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
+			dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
+		}
+	} else {
+		for (i = 0; i < 8; i++) {
+			/* X values */
+			dev->xy_cur[i     ] = dev->data[5 * i +  2];
+			dev->xy_cur[i +  8] = dev->data[5 * i +  4];
+			dev->xy_cur[i + 16] = dev->data[5 * i + 42];
+			if (i < 2)
+				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];
+		}
+	}
+
+	dbg_dump("sample", dev->xy_cur);
+
+	if (!dev->valid) {
+		/* first sample */
+		dev->valid = 1;
+		dev->x_old = dev->y_old = -1;
+		memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
+
+		if (atp_is_geyser_3(dev)) /* No 17" Macbooks (yet) */
+			goto exit;
+
+		/* 17" Powerbooks have extra X sensors */
+		for (i = (atp_is_geyser_2(dev)?15:16); i < ATP_XSENSORS; i++) {
+			if (!dev->xy_cur[i]) continue;
+
+			printk("appletouch: 17\" model detected.\n");
+			if(atp_is_geyser_2(dev))
+				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,
+						     (ATP_XSENSORS - 1) *
+						     ATP_XFACT - 1,
+						     ATP_FUZZ, 0);
+
+			break;
+		}
+
+		goto exit;
+	}
+
+	for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
+		/* accumulate the change */
+		signed char change = dev->xy_old[i] - dev->xy_cur[i];
+		dev->xy_acc[i] -= change;
+
+		/* prevent down drifting */
+		if (dev->xy_acc[i] < 0)
+			dev->xy_acc[i] = 0;
+	}
+
+	memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
+
+	dbg_dump("accumulator", dev->xy_acc);
+
+	x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
+			      ATP_XFACT, &x_z, &x_f);
+	y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
+			      ATP_YFACT, &y_z, &y_f);
+
+	if (x && y) {
+		if (dev->x_old != -1) {
+			x = (dev->x_old * 3 + x) >> 2;
+			y = (dev->y_old * 3 + y) >> 2;
+			dev->x_old = x;
+			dev->y_old = y;
+
+			if (debug > 1)
+				printk("appletouch: X: %3d Y: %3d "
+				       "Xz: %3d Yz: %3d\n",
+				       x, y, x_z, y_z);
+
+			input_report_key(dev->input, BTN_TOUCH, 1);
+			input_report_abs(dev->input, ABS_X, x);
+			input_report_abs(dev->input, ABS_Y, y);
+			input_report_abs(dev->input, ABS_PRESSURE,
+					 min(ATP_PRESSURE, x_z + y_z));
+			atp_report_fingers(dev->input, max(x_f, y_f));
+		}
+		dev->x_old = x;
+		dev->y_old = y;
+	}
+	else if (!x && !y) {
+
+		dev->x_old = dev->y_old = -1;
+		input_report_key(dev->input, BTN_TOUCH, 0);
+		input_report_abs(dev->input, ABS_PRESSURE, 0);
+		atp_report_fingers(dev->input, 0);
+
+		/* reset the accumulator on release */
+		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
+	}
+
+	input_report_key(dev->input, BTN_LEFT,
+			 !!dev->data[dev->datalen - 1]);
+
+	input_sync(dev->input);
+
+exit:
+	retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
+	if (retval) {
+		err("%s - usb_submit_urb failed with result %d",
+		    __FUNCTION__, retval);
+	}
+}
+
+static int atp_open(struct input_dev *input)
+{
+	struct atp *dev = input_get_drvdata(input);
+
+	if (usb_submit_urb(dev->urb, GFP_ATOMIC))
+		return -EIO;
+
+	dev->open = 1;
+	return 0;
+}
+
+static void atp_close(struct input_dev *input)
+{
+	struct atp *dev = input_get_drvdata(input);
+
+	usb_kill_urb(dev->urb);
+	dev->open = 0;
+}
+
+static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
+{
+	struct atp *dev;
+	struct input_dev *input_dev;
+	struct usb_device *udev = interface_to_usbdev(iface);
+	struct usb_host_interface *iface_desc;
+	struct usb_endpoint_descriptor *endpoint;
+	int int_in_endpointAddr = 0;
+	int i, error = -ENOMEM;
+
+	/* set up the endpoint information */
+	/* use only the first interrupt-in endpoint */
+	iface_desc = iface->cur_altsetting;
+	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
+		endpoint = &iface_desc->endpoint[i].desc;
+		if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
+			/* we found an interrupt in endpoint */
+			int_in_endpointAddr = endpoint->bEndpointAddress;
+			break;
+		}
+	}
+	if (!int_in_endpointAddr) {
+		err("Could not find int-in endpoint");
+		return -EIO;
+	}
+
+	/* allocate memory for our device state and initialize it */
+	dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!dev || !input_dev) {
+		err("Out of memory");
+		goto err_free_devs;
+	}
+
+	dev->udev = udev;
+	dev->input = input_dev;
+	dev->overflowwarn = 0;
+	if (atp_is_geyser_3(dev))
+		dev->datalen = 64;
+	else if (atp_is_geyser_2(dev))
+		dev->datalen = 64;
+	else
+		dev->datalen = 81;
+
+	if (atp_is_geyser_3(dev)) {
+		/*
+		 * By default Geyser 3 device sends standard USB HID mouse
+		 * packets (Report ID 2). This code changes device mode, so it
+		 * sends raw sensor reports (Report ID 5).
+		 */
+		char data[8];
+		int size;
+
+		size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			ATP_GEYSER3_MODE_READ_REQUEST_ID,
+			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			ATP_GEYSER3_MODE_REQUEST_VALUE,
+			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+		if (size != 8) {
+			err("Could not do mode read request from device"
+							" (Geyser 3 mode)");
+			goto err_free_devs;
+		}
+
+		/* Apply the mode switch */
+		data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+		size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			ATP_GEYSER3_MODE_REQUEST_VALUE,
+			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+		if (size != 8) {
+			err("Could not do mode write request to device"
+							" (Geyser 3 mode)");
+			goto err_free_devs;
+		}
+		printk("appletouch Geyser 3 inited.\n");
+	}
+
+	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->urb->transfer_dma);
+	if (!dev->data)
+		goto err_free_urb;
+
+	usb_fill_int_urb(dev->urb, udev,
+			 usb_rcvintpipe(udev, int_in_endpointAddr),
+			 dev->data, dev->datalen, atp_complete, dev, 1);
+
+	usb_make_path(udev, dev->phys, sizeof(dev->phys));
+	strlcat(dev->phys, "/input0", sizeof(dev->phys));
+
+	input_dev->name = "appletouch";
+	input_dev->phys = dev->phys;
+	usb_to_input_id(dev->udev, &input_dev->id);
+	input_dev->dev.parent = &iface->dev;
+
+	input_set_drvdata(input_dev, dev);
+
+	input_dev->open = atp_open;
+	input_dev->close = atp_close;
+
+	set_bit(EV_ABS, input_dev->evbit);
+
+	if (atp_is_geyser_3(dev)) {
+		/*
+		 * 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 (atp_is_geyser_2(dev)) {
+		/*
+		 * 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_PRESSURE, 0, ATP_PRESSURE, 0, 0);
+
+	set_bit(EV_KEY, input_dev->evbit);
+	set_bit(BTN_TOUCH, input_dev->keybit);
+	set_bit(BTN_TOOL_FINGER, input_dev->keybit);
+	set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
+	set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
+	set_bit(BTN_LEFT, input_dev->keybit);
+
+	error = input_register_device(dev->input);
+	if (error)
+		goto err_free_buffer;
+
+	/* save our data pointer in this interface device */
+	usb_set_intfdata(iface, dev);
+
+	return 0;
+
+ err_free_buffer:
+	usb_buffer_free(dev->udev, dev->datalen,
+			dev->data, dev->urb->transfer_dma);
+ err_free_urb:
+	usb_free_urb(dev->urb);
+ err_free_devs:
+	usb_set_intfdata(iface, NULL);
+	kfree(dev);
+	input_free_device(input_dev);
+	return error;
+}
+
+static void atp_disconnect(struct usb_interface *iface)
+{
+	struct atp *dev = usb_get_intfdata(iface);
+
+	usb_set_intfdata(iface, NULL);
+	if (dev) {
+		usb_kill_urb(dev->urb);
+		input_unregister_device(dev->input);
+		usb_buffer_free(dev->udev, dev->datalen,
+				dev->data, dev->urb->transfer_dma);
+		usb_free_urb(dev->urb);
+		kfree(dev);
+	}
+	printk(KERN_INFO "input: appletouch disconnected\n");
+}
+
+static int atp_suspend(struct usb_interface *iface, pm_message_t message)
+{
+	struct atp *dev = usb_get_intfdata(iface);
+	usb_kill_urb(dev->urb);
+	dev->valid = 0;
+	return 0;
+}
+
+static int atp_resume(struct usb_interface *iface)
+{
+	struct atp *dev = usb_get_intfdata(iface);
+	if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
+		return -EIO;
+
+	return 0;
+}
+
+static struct usb_driver atp_driver = {
+	.name		= "appletouch",
+	.probe		= atp_probe,
+	.disconnect	= atp_disconnect,
+	.suspend	= atp_suspend,
+	.resume		= atp_resume,
+	.id_table	= atp_table,
+};
+
+static int __init atp_init(void)
+{
+	return usb_register(&atp_driver);
+}
+
+static void __exit atp_exit(void)
+{
+	usb_deregister(&atp_driver);
+}
+
+module_init(atp_init);
+module_exit(atp_exit);