[net-next-2.6.git] / drivers / usb / input / appletouch.c

/*
 * 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/config.h>
#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 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

#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(0x020E) },
	{ ATP_DEVICE(0x020F) },
	{ ATP_DEVICE(0x030A) },
	{ ATP_DEVICE(0x030B) },

	/* PowerBooks Oct 2005 */
	{ ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },
	{ ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
	{ ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },

	{ ATP_DEVICE(GEYSER3_ANSI_PRODUCT_ID) },
	{ ATP_DEVICE(GEYSER3_ISO_PRODUCT_ID) },
	{ ATP_DEVICE(GEYSER3_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) 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");

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);
}

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;

	*fingers = 0;

	for (i = 0; i < nb_sensors; i++) {
		if (xy_sensors[i] < ATP_THRESHOLD)
			continue;
		if ((i - 1 < 0) || (xy_sensors[i - 1] < ATP_THRESHOLD))
			(*fingers)++;
		pcum += xy_sensors[i] * i;
		psum += xy_sensors[i];
	}

	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, struct pt_regs* regs)
{
	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->private;

	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->private;

	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, retval = -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 &&
		    (endpoint->bEndpointAddress & USB_DIR_IN) &&
		    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
					== USB_ENDPOINT_XFER_INT)) {
			/* 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) {
		retval = -ENOMEM;
		goto err_free_devs;
	}

	dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
				     &dev->urb->transfer_dma);
	if (!dev->data) {
		retval = -ENOMEM;
		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->cdev.dev = &iface->dev;

	input_dev->private = 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);

	input_register_device(dev->input);

	/* save our data pointer in this interface device */
	usb_set_intfdata(iface, dev);

	return 0;

 err_free_urb:
	usb_free_urb(dev->urb);
 err_free_devs:
	usb_set_intfdata(iface, NULL);
	kfree(dev);
	input_free_device(input_dev);
	return retval;
}

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_free_urb(dev->urb);
		usb_buffer_free(dev->udev, dev->datalen,
				dev->data, dev->urb->transfer_dma);
		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);
Commit	Line	Data
f7214ff4	1	/*
9effa978	2	* Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
f7214ff4 SP	3	*
	4	* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
	5	* Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net)
	6	* Copyright (C) 2005 Stelian Pop (stelian@popies.net)
	7	* Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
	8	* Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
e1e02c9f	9	* Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
9effa978	10	* Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
f7214ff4 SP	11	*
	12	* Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License as published by
	16	* the Free Software Foundation; either version 2 of the License, or
	17	* (at your option) any later version.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	27	*
	28	*/
	29
	30	#include <linux/config.h>
	31	#include <linux/kernel.h>
	32	#include <linux/errno.h>
	33	#include <linux/init.h>
	34	#include <linux/slab.h>
	35	#include <linux/module.h>
ae0dadcf	36	#include <linux/usb/input.h>
f7214ff4 SP	37
	38	/* Apple has powerbooks which have the keyboard with different Product IDs */
	39	#define APPLE_VENDOR_ID 0x05AC
	40
e1e02c9f MH	41	/* These names come from Info.plist in AppleUSBTrackpad.kext */
	42	#define GEYSER_ANSI_PRODUCT_ID 0x0214
	43	#define GEYSER_ISO_PRODUCT_ID 0x0215
	44	#define GEYSER_JIS_PRODUCT_ID 0x0216
	45
9effa978 NB	46	/* MacBook devices */
	47	#define GEYSER3_ANSI_PRODUCT_ID 0x0217
	48	#define GEYSER3_ISO_PRODUCT_ID 0x0218
	49	#define GEYSER3_JIS_PRODUCT_ID 0x0219
	50
f7214ff4	51	#define ATP_DEVICE(prod) \
c5b7c7c3	52	.match_flags = USB_DEVICE_ID_MATCH_DEVICE \| \
f7214ff4 SP	53	USB_DEVICE_ID_MATCH_INT_CLASS \| \
	54	USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
	55	.idVendor = APPLE_VENDOR_ID, \
	56	.idProduct = (prod), \
	57	.bInterfaceClass = 0x03, \
	58	.bInterfaceProtocol = 0x02
	59
	60	/* table of devices that work with this driver */
	61	static struct usb_device_id atp_table [] = {
	62	{ ATP_DEVICE(0x020E) },
	63	{ ATP_DEVICE(0x020F) },
	64	{ ATP_DEVICE(0x030A) },
	65	{ ATP_DEVICE(0x030B) },
e1e02c9f MH	66
	67	/* PowerBooks Oct 2005 */
	68	{ ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },
	69	{ ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
	70	{ ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },
	71
9effa978 NB	72	{ ATP_DEVICE(GEYSER3_ANSI_PRODUCT_ID) },
	73	{ ATP_DEVICE(GEYSER3_ISO_PRODUCT_ID) },
	74	{ ATP_DEVICE(GEYSER3_JIS_PRODUCT_ID) },
	75
e1e02c9f MH	76	/* Terminating entry */
e1e02c9f MH	77	{ }
f7214ff4 SP	78	};
	79	MODULE_DEVICE_TABLE (usb, atp_table);
	80
f7214ff4 SP	81	/*
	82	* number of sensors. Note that only 16 instead of 26 X (horizontal)
	83	* sensors exist on 12" and 15" PowerBooks. All models have 16 Y
	84	* (vertical) sensors.
	85	*/
	86	#define ATP_XSENSORS 26
	87	#define ATP_YSENSORS 16
	88
	89	/* amount of fuzz this touchpad generates */
	90	#define ATP_FUZZ 16
	91
	92	/* maximum pressure this driver will report */
	93	#define ATP_PRESSURE 300
	94	/*
	95	* multiplication factor for the X and Y coordinates.
	96	* We try to keep the touchpad aspect ratio while still doing only simple
	97	* arithmetics.
	98	* The factors below give coordinates like:
c5b7c7c3 DT	99	* 0 <= x < 960 on 12" and 15" Powerbooks
	100	* 0 <= x < 1600 on 17" Powerbooks
	101	* 0 <= y < 646
f7214ff4 SP	102	*/
	103	#define ATP_XFACT 64
	104	#define ATP_YFACT 43
	105
	106	/*
	107	* Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
	108	* ignored.
	109	*/
	110	#define ATP_THRESHOLD 5
	111
9effa978 NB	112	/* MacBook Pro (Geyser 3) initialization constants */
	113	#define ATP_GEYSER3_MODE_READ_REQUEST_ID 1
	114	#define ATP_GEYSER3_MODE_WRITE_REQUEST_ID 9
	115	#define ATP_GEYSER3_MODE_REQUEST_VALUE 0x300
	116	#define ATP_GEYSER3_MODE_REQUEST_INDEX 0
	117	#define ATP_GEYSER3_MODE_VENDOR_VALUE 0x04
	118
f7214ff4 SP	119	/* Structure to hold all of our device specific stuff */
f7214ff4 SP	120	struct atp {
c5b7c7c3	121	char phys[64];
f7214ff4 SP	122	struct usb_device * udev; /* usb device */
	123	struct urb * urb; /* usb request block */
	124	signed char * data; /* transferred data */
	125	int open; /* non-zero if opened */
c5b7c7c3	126	struct input_dev input; / input dev */
f7214ff4 SP	127	int valid; /* are the sensors valid ? */
	128	int x_old; /* last reported x/y, */
	129	int y_old; /* used for smoothing */
	130	/* current value of the sensors */
	131	signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
	132	/* last value of the sensors */
	133	signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
	134	/* accumulated sensors */
	135	int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
e1e02c9f MH	136	int overflowwarn; /* overflow warning printed? */
e1e02c9f MH	137	int datalen; /* size of an USB urb transfer */
f7214ff4 SP	138	};
	139
	140	#define dbg_dump(msg, tab) \
	141	if (debug > 1) { \
	142	int i; \
	143	printk("appletouch: %s %lld", msg, (long long)jiffies); \
	144	for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) \
c5b7c7c3 DT	145	printk(" %02x", tab[i]); \
c5b7c7c3 DT	146	printk("\n"); \
f7214ff4 SP	147	}
f7214ff4 SP	148
c5b7c7c3	149	#define dprintk(format, a...) \
f7214ff4 SP	150	do { \
	151	if (debug) printk(format, ##a); \
	152	} while (0)
	153
e1e02c9f	154	MODULE_AUTHOR("Johannes Berg, Stelian Pop, Frank Arnold, Michael Hanselmann");
f7214ff4 SP	155	MODULE_DESCRIPTION("Apple PowerBooks USB touchpad driver");
	156	MODULE_LICENSE("GPL");
	157
	158	static int debug = 1;
	159	module_param(debug, int, 0644);
	160	MODULE_PARM_DESC(debug, "Activate debugging output");
	161
e1e02c9f MH	162	/* Checks if the device a Geyser 2 (ANSI, ISO, JIS) */
	163	static inline int atp_is_geyser_2(struct atp *dev)
	164	{
9effa978	165	u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
e1e02c9f MH	166
	167	return (productId == GEYSER_ANSI_PRODUCT_ID) \|\|
	168	(productId == GEYSER_ISO_PRODUCT_ID) \|\|
	169	(productId == GEYSER_JIS_PRODUCT_ID);
	170	}
	171
9effa978 NB	172	static inline int atp_is_geyser_3(struct atp *dev)
	173	{
	174	u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
	175
	176	return (productId == GEYSER3_ANSI_PRODUCT_ID) \|\|
	177	(productId == GEYSER3_ISO_PRODUCT_ID) \|\|
	178	(productId == GEYSER3_JIS_PRODUCT_ID);
	179	}
	180
f7214ff4 SP	181	static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
	182	int z, int fingers)
	183	{
	184	int i;
	185	/* values to calculate mean */
	186	int pcum = 0, psum = 0;
	187
	188	*fingers = 0;
	189
	190	for (i = 0; i < nb_sensors; i++) {
	191	if (xy_sensors[i] < ATP_THRESHOLD)
	192	continue;
	193	if ((i - 1 < 0) \|\| (xy_sensors[i - 1] < ATP_THRESHOLD))
	194	(*fingers)++;
	195	pcum += xy_sensors[i] * i;
	196	psum += xy_sensors[i];
	197	}
	198
	199	if (psum > 0) {
	200	*z = psum;
	201	return pcum * fact / psum;
	202	}
	203
	204	return 0;
	205	}
	206
	207	static inline void atp_report_fingers(struct input_dev *input, int fingers)
	208	{
	209	input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
	210	input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
	211	input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
	212	}
	213
	214	static void atp_complete(struct urb* urb, struct pt_regs* regs)
	215	{
	216	int x, y, x_z, y_z, x_f, y_f;
e1e02c9f	217	int retval, i, j;
f7214ff4 SP	218	struct atp *dev = urb->context;
	219
	220	switch (urb->status) {
	221	case 0:
	222	/* success */
	223	break;
e1e02c9f MH	224	case -EOVERFLOW:
	225	if(!dev->overflowwarn) {
	226	printk("appletouch: OVERFLOW with data "
	227	"length %d, actual length is %d\n",
	228	dev->datalen, dev->urb->actual_length);
	229	dev->overflowwarn = 1;
	230	}
f7214ff4 SP	231	case -ECONNRESET:
	232	case -ENOENT:
	233	case -ESHUTDOWN:
	234	/* This urb is terminated, clean up */
	235	dbg("%s - urb shutting down with status: %d",
	236	__FUNCTION__, urb->status);
	237	return;
	238	default:
	239	dbg("%s - nonzero urb status received: %d",
	240	__FUNCTION__, urb->status);
	241	goto exit;
	242	}
	243
	244	/* drop incomplete datasets */
e1e02c9f	245	if (dev->urb->actual_length != dev->datalen) {
9effa978 NB	246	dprintk("appletouch: incomplete data package"
	247	" (first byte: %d, length: %d).\n",
	248	dev->data[0], dev->urb->actual_length);
f7214ff4 SP	249	goto exit;
	250	}
	251
	252	/* reorder the sensors values */
9effa978 NB	253	if (atp_is_geyser_3(dev)) {
	254	memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
	255
	256	/*
	257	* The values are laid out like this:
	258	* -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
	259	* '-' is an unused value.
	260	*/
	261
	262	/* read X values */
	263	for (i = 0, j = 19; i < 20; i += 2, j += 3) {
	264	dev->xy_cur[i] = dev->data[j + 1];
	265	dev->xy_cur[i + 1] = dev->data[j + 2];
	266	}
	267	/* read Y values */
	268	for (i = 0, j = 1; i < 9; i += 2, j += 3) {
	269	dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
	270	dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
	271	}
	272	} else if (atp_is_geyser_2(dev)) {
e1e02c9f MH	273	memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
	274
	275	/*
	276	* The values are laid out like this:
	277	* Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
	278	* '-' is an unused value.
	279	*/
	280
	281	/* read X values */
	282	for (i = 0, j = 19; i < 20; i += 2, j += 3) {
	283	dev->xy_cur[i] = dev->data[j];
	284	dev->xy_cur[i + 1] = dev->data[j + 1];
	285	}
	286
	287	/* read Y values */
	288	for (i = 0, j = 1; i < 9; i += 2, j += 3) {
	289	dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
	290	dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
	291	}
	292	} else {
	293	for (i = 0; i < 8; i++) {
	294	/* X values */
	295	dev->xy_cur[i ] = dev->data[5 * i + 2];
	296	dev->xy_cur[i + 8] = dev->data[5 * i + 4];
	297	dev->xy_cur[i + 16] = dev->data[5 * i + 42];
	298	if (i < 2)
	299	dev->xy_cur[i + 24] = dev->data[5 * i + 44];
	300
	301	/* Y values */
	302	dev->xy_cur[i + 26] = dev->data[5 * i + 1];
	303	dev->xy_cur[i + 34] = dev->data[5 * i + 3];
	304	}
f7214ff4 SP	305	}
	306
	307	dbg_dump("sample", dev->xy_cur);
	308
	309	if (!dev->valid) {
	310	/* first sample */
	311	dev->valid = 1;
	312	dev->x_old = dev->y_old = -1;
	313	memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
	314
9effa978 NB	315	if (atp_is_geyser_3(dev)) /* No 17" Macbooks (yet) */
	316	goto exit;
	317
e1e02c9f MH	318	/* 17" Powerbooks have extra X sensors */
	319	for (i = (atp_is_geyser_2(dev)?15:16); i < ATP_XSENSORS; i++) {
	320	if (!dev->xy_cur[i]) continue;
	321
	322	printk("appletouch: 17\" model detected.\n");
	323	if(atp_is_geyser_2(dev))
	324	input_set_abs_params(dev->input, ABS_X, 0,
	325	(20 - 1) *
	326	ATP_XFACT - 1,
	327	ATP_FUZZ, 0);
	328	else
c5b7c7c3 DT	329	input_set_abs_params(dev->input, ABS_X, 0,
c5b7c7c3 DT	330	(ATP_XSENSORS - 1) *
f7214ff4 SP	331	ATP_XFACT - 1,
f7214ff4 SP	332	ATP_FUZZ, 0);
e1e02c9f MH	333
	334	break;
	335	}
f7214ff4 SP	336
	337	goto exit;
	338	}
	339
	340	for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
	341	/* accumulate the change */
	342	signed char change = dev->xy_old[i] - dev->xy_cur[i];
	343	dev->xy_acc[i] -= change;
	344
	345	/* prevent down drifting */
	346	if (dev->xy_acc[i] < 0)
	347	dev->xy_acc[i] = 0;
	348	}
	349
	350	memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
	351
	352	dbg_dump("accumulator", dev->xy_acc);
	353
	354	x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
	355	ATP_XFACT, &x_z, &x_f);
	356	y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
	357	ATP_YFACT, &y_z, &y_f);
	358
	359	if (x && y) {
	360	if (dev->x_old != -1) {
	361	x = (dev->x_old * 3 + x) >> 2;
	362	y = (dev->y_old * 3 + y) >> 2;
	363	dev->x_old = x;
	364	dev->y_old = y;
	365
	366	if (debug > 1)
	367	printk("appletouch: X: %3d Y: %3d "
	368	"Xz: %3d Yz: %3d\n",
	369	x, y, x_z, y_z);
	370
c5b7c7c3 DT	371	input_report_key(dev->input, BTN_TOUCH, 1);
	372	input_report_abs(dev->input, ABS_X, x);
	373	input_report_abs(dev->input, ABS_Y, y);
	374	input_report_abs(dev->input, ABS_PRESSURE,
f7214ff4	375	min(ATP_PRESSURE, x_z + y_z));
c5b7c7c3	376	atp_report_fingers(dev->input, max(x_f, y_f));
f7214ff4 SP	377	}
	378	dev->x_old = x;
	379	dev->y_old = y;
	380	}
	381	else if (!x && !y) {
	382
	383	dev->x_old = dev->y_old = -1;
c5b7c7c3 DT	384	input_report_key(dev->input, BTN_TOUCH, 0);
	385	input_report_abs(dev->input, ABS_PRESSURE, 0);
	386	atp_report_fingers(dev->input, 0);
f7214ff4 SP	387
	388	/* reset the accumulator on release */
	389	memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
	390	}
	391
e1e02c9f MH	392	input_report_key(dev->input, BTN_LEFT,
e1e02c9f MH	393	!!dev->data[dev->datalen - 1]);
f7214ff4	394
c5b7c7c3	395	input_sync(dev->input);
f7214ff4 SP	396
	397	exit:
	398	retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
	399	if (retval) {
	400	err("%s - usb_submit_urb failed with result %d",
	401	__FUNCTION__, retval);
	402	}
	403	}
	404
	405	static int atp_open(struct input_dev *input)
	406	{
	407	struct atp *dev = input->private;
	408
	409	if (usb_submit_urb(dev->urb, GFP_ATOMIC))
	410	return -EIO;
	411
	412	dev->open = 1;
	413	return 0;
	414	}
	415
	416	static void atp_close(struct input_dev *input)
	417	{
	418	struct atp *dev = input->private;
	419
	420	usb_kill_urb(dev->urb);
	421	dev->open = 0;
	422	}
	423
	424	static int atp_probe(struct usb_interface iface, const struct usb_device_id id)
	425	{
c5b7c7c3 DT	426	struct atp *dev;
	427	struct input_dev *input_dev;
	428	struct usb_device *udev = interface_to_usbdev(iface);
f7214ff4 SP	429	struct usb_host_interface *iface_desc;
	430	struct usb_endpoint_descriptor *endpoint;
	431	int int_in_endpointAddr = 0;
	432	int i, retval = -ENOMEM;
	433
f7214ff4 SP	434
	435	/* set up the endpoint information */
	436	/* use only the first interrupt-in endpoint */
	437	iface_desc = iface->cur_altsetting;
	438	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
	439	endpoint = &iface_desc->endpoint[i].desc;
	440	if (!int_in_endpointAddr &&
	441	(endpoint->bEndpointAddress & USB_DIR_IN) &&
	442	((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
	443	== USB_ENDPOINT_XFER_INT)) {
	444	/* we found an interrupt in endpoint */
	445	int_in_endpointAddr = endpoint->bEndpointAddress;
	446	break;
	447	}
	448	}
	449	if (!int_in_endpointAddr) {
f7214ff4	450	err("Could not find int-in endpoint");
c5b7c7c3	451	return -EIO;
f7214ff4 SP	452	}
f7214ff4 SP	453
c5b7c7c3 DT	454	/* allocate memory for our device state and initialize it */
	455	dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
	456	input_dev = input_allocate_device();
	457	if (!dev \|\| !input_dev) {
	458	err("Out of memory");
	459	goto err_free_devs;
	460	}
	461
	462	dev->udev = udev;
	463	dev->input = input_dev;
e1e02c9f	464	dev->overflowwarn = 0;
9effa978 NB	465	if (atp_is_geyser_3(dev))
	466	dev->datalen = 64;
	467	else if (atp_is_geyser_2(dev))
	468	dev->datalen = 64;
	469	else
	470	dev->datalen = 81;
	471
	472	if (atp_is_geyser_3(dev)) {
	473	/*
	474	* By default Geyser 3 device sends standard USB HID mouse
	475	* packets (Report ID 2). This code changes device mode, so it
	476	* sends raw sensor reports (Report ID 5).
	477	*/
	478	char data[8];
	479	int size;
	480
	481	size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
	482	ATP_GEYSER3_MODE_READ_REQUEST_ID,
	483	USB_DIR_IN \| USB_TYPE_CLASS \| USB_RECIP_INTERFACE,
	484	ATP_GEYSER3_MODE_REQUEST_VALUE,
	485	ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
	486
	487	if (size != 8) {
	488	err("Could not do mode read request from device"
	489	" (Geyser 3 mode)");
	490	goto err_free_devs;
	491	}
	492
	493	/* Apply the mode switch */
	494	data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
	495
	496	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
	497	ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
	498	USB_DIR_OUT \| USB_TYPE_CLASS \| USB_RECIP_INTERFACE,
	499	ATP_GEYSER3_MODE_REQUEST_VALUE,
	500	ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
	501
	502	if (size != 8) {
	503	err("Could not do mode write request to device"
	504	" (Geyser 3 mode)");
	505	goto err_free_devs;
	506	}
	507	printk("appletouch Geyser 3 inited.\n");
	508	}
f7214ff4 SP	509
	510	dev->urb = usb_alloc_urb(0, GFP_KERNEL);
	511	if (!dev->urb) {
	512	retval = -ENOMEM;
c5b7c7c3	513	goto err_free_devs;
f7214ff4	514	}
c5b7c7c3	515
e1e02c9f	516	dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
f7214ff4 SP	517	&dev->urb->transfer_dma);
	518	if (!dev->data) {
	519	retval = -ENOMEM;
c5b7c7c3	520	goto err_free_urb;
f7214ff4	521	}
c5b7c7c3 DT	522
	523	usb_fill_int_urb(dev->urb, udev,
	524	usb_rcvintpipe(udev, int_in_endpointAddr),
e1e02c9f	525	dev->data, dev->datalen, atp_complete, dev, 1);
f7214ff4	526
c5b7c7c3 DT	527	usb_make_path(udev, dev->phys, sizeof(dev->phys));
	528	strlcat(dev->phys, "/input0", sizeof(dev->phys));
	529
	530	input_dev->name = "appletouch";
	531	input_dev->phys = dev->phys;
	532	usb_to_input_id(dev->udev, &input_dev->id);
	533	input_dev->cdev.dev = &iface->dev;
f7214ff4	534
c5b7c7c3 DT	535	input_dev->private = dev;
	536	input_dev->open = atp_open;
	537	input_dev->close = atp_close;
f7214ff4	538
c5b7c7c3	539	set_bit(EV_ABS, input_dev->evbit);
f7214ff4	540
9effa978 NB	541	if (atp_is_geyser_3(dev)) {
	542	/*
	543	* MacBook have 20 X sensors, 10 Y sensors
	544	*/
	545	input_set_abs_params(input_dev, ABS_X, 0,
	546	((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
	547	input_set_abs_params(input_dev, ABS_Y, 0,
	548	((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
	549	} else if (atp_is_geyser_2(dev)) {
e1e02c9f MH	550	/*
	551	* Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
	552	* later.
	553	*/
	554	input_set_abs_params(input_dev, ABS_X, 0,
	555	((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
	556	input_set_abs_params(input_dev, ABS_Y, 0,
	557	((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
	558	} else {
	559	/*
	560	* 12" and 15" Powerbooks only have 16 x sensors,
	561	* 17" models are detected later.
	562	*/
	563	input_set_abs_params(input_dev, ABS_X, 0,
	564	(16 - 1) * ATP_XFACT - 1, ATP_FUZZ, 0);
	565	input_set_abs_params(input_dev, ABS_Y, 0,
	566	(ATP_YSENSORS - 1) * ATP_YFACT - 1, ATP_FUZZ, 0);
	567	}
c5b7c7c3	568	input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
f7214ff4	569
c5b7c7c3 DT	570	set_bit(EV_KEY, input_dev->evbit);
	571	set_bit(BTN_TOUCH, input_dev->keybit);
	572	set_bit(BTN_TOOL_FINGER, input_dev->keybit);
	573	set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
	574	set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
	575	set_bit(BTN_LEFT, input_dev->keybit);
f7214ff4	576
c5b7c7c3	577	input_register_device(dev->input);
f7214ff4	578
c5b7c7c3 DT	579	/* save our data pointer in this interface device */
c5b7c7c3 DT	580	usb_set_intfdata(iface, dev);
f7214ff4 SP	581
	582	return 0;
	583
c5b7c7c3	584	err_free_urb:
f7214ff4	585	usb_free_urb(dev->urb);
c5b7c7c3	586	err_free_devs:
f7214ff4	587	usb_set_intfdata(iface, NULL);
f7214ff4	588	kfree(dev);
c5b7c7c3	589	input_free_device(input_dev);
f7214ff4 SP	590	return retval;
	591	}
	592
	593	static void atp_disconnect(struct usb_interface *iface)
	594	{
	595	struct atp *dev = usb_get_intfdata(iface);
	596
	597	usb_set_intfdata(iface, NULL);
	598	if (dev) {
	599	usb_kill_urb(dev->urb);
c5b7c7c3	600	input_unregister_device(dev->input);
f7214ff4	601	usb_free_urb(dev->urb);
e1e02c9f	602	usb_buffer_free(dev->udev, dev->datalen,
f7214ff4 SP	603	dev->data, dev->urb->transfer_dma);
	604	kfree(dev);
	605	}
	606	printk(KERN_INFO "input: appletouch disconnected\n");
	607	}
	608
	609	static int atp_suspend(struct usb_interface *iface, pm_message_t message)
	610	{
	611	struct atp *dev = usb_get_intfdata(iface);
	612	usb_kill_urb(dev->urb);
	613	dev->valid = 0;
	614	return 0;
	615	}
	616
	617	static int atp_resume(struct usb_interface *iface)
	618	{
	619	struct atp *dev = usb_get_intfdata(iface);
	620	if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
	621	return -EIO;
	622
	623	return 0;
	624	}
	625
	626	static struct usb_driver atp_driver = {
f7214ff4 SP	627	.name = "appletouch",
	628	.probe = atp_probe,
	629	.disconnect = atp_disconnect,
	630	.suspend = atp_suspend,
	631	.resume = atp_resume,
	632	.id_table = atp_table,
	633	};
	634
	635	static int __init atp_init(void)
	636	{
	637	return usb_register(&atp_driver);
	638	}
	639
	640	static void __exit atp_exit(void)
	641	{
	642	usb_deregister(&atp_driver);
	643	}
	644
	645	module_init(atp_init);
	646	module_exit(atp_exit);