Initial import

1 files changed, 983 insertions, 0 deletions

diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
new file mode 100644
index 000000000..b10709f04
--- /dev/null
+++ b/drivers/input/mouse/bcm5974.c
@@ -0,0 +1,983 @@
+/*
+ * Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver
+ *
+ * Copyright (C) 2008	   Henrik Rydberg (rydberg@euromail.se)
+ *
+ * The USB initialization and package decoding was made by
+ * Scott Shawcroft as part of the touchd user-space driver project:
+ * Copyright (C) 2008	   Scott Shawcroft (scott.shawcroft@gmail.com)
+ *
+ * The BCM5974 driver is based on the appletouch 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)
+ *
+ * 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/slab.h>
+#include <linux/module.h>
+#include <linux/usb/input.h>
+#include <linux/hid.h>
+#include <linux/mutex.h>
+#include <linux/input/mt.h>
+
+#define USB_VENDOR_ID_APPLE		0x05ac
+
+/* MacbookAir, aka wellspring */
+#define USB_DEVICE_ID_APPLE_WELLSPRING_ANSI	0x0223
+#define USB_DEVICE_ID_APPLE_WELLSPRING_ISO	0x0224
+#define USB_DEVICE_ID_APPLE_WELLSPRING_JIS	0x0225
+/* MacbookProPenryn, aka wellspring2 */
+#define USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI	0x0230
+#define USB_DEVICE_ID_APPLE_WELLSPRING2_ISO	0x0231
+#define USB_DEVICE_ID_APPLE_WELLSPRING2_JIS	0x0232
+/* Macbook5,1 (unibody), aka wellspring3 */
+#define USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI	0x0236
+#define USB_DEVICE_ID_APPLE_WELLSPRING3_ISO	0x0237
+#define USB_DEVICE_ID_APPLE_WELLSPRING3_JIS	0x0238
+/* MacbookAir3,2 (unibody), aka wellspring5 */
+#define USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI	0x023f
+#define USB_DEVICE_ID_APPLE_WELLSPRING4_ISO	0x0240
+#define USB_DEVICE_ID_APPLE_WELLSPRING4_JIS	0x0241
+/* MacbookAir3,1 (unibody), aka wellspring4 */
+#define USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI	0x0242
+#define USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO	0x0243
+#define USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS	0x0244
+/* Macbook8 (unibody, March 2011) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI	0x0245
+#define USB_DEVICE_ID_APPLE_WELLSPRING5_ISO	0x0246
+#define USB_DEVICE_ID_APPLE_WELLSPRING5_JIS	0x0247
+/* MacbookAir4,1 (unibody, July 2011) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI	0x0249
+#define USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO	0x024a
+#define USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS	0x024b
+/* MacbookAir4,2 (unibody, July 2011) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI	0x024c
+#define USB_DEVICE_ID_APPLE_WELLSPRING6_ISO	0x024d
+#define USB_DEVICE_ID_APPLE_WELLSPRING6_JIS	0x024e
+/* Macbook8,2 (unibody) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI	0x0252
+#define USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO	0x0253
+#define USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS	0x0254
+/* MacbookPro10,1 (unibody, June 2012) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI	0x0262
+#define USB_DEVICE_ID_APPLE_WELLSPRING7_ISO	0x0263
+#define USB_DEVICE_ID_APPLE_WELLSPRING7_JIS	0x0264
+/* MacbookPro10,2 (unibody, October 2012) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI	0x0259
+#define USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO	0x025a
+#define USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS	0x025b
+/* MacbookAir6,2 (unibody, June 2013) */
+#define USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI	0x0290
+#define USB_DEVICE_ID_APPLE_WELLSPRING8_ISO	0x0291
+#define USB_DEVICE_ID_APPLE_WELLSPRING8_JIS	0x0292
+
+#define BCM5974_DEVICE(prod) {					\
+	.match_flags = (USB_DEVICE_ID_MATCH_DEVICE |		\
+			USB_DEVICE_ID_MATCH_INT_CLASS |		\
+			USB_DEVICE_ID_MATCH_INT_PROTOCOL),	\
+	.idVendor = USB_VENDOR_ID_APPLE,			\
+	.idProduct = (prod),					\
+	.bInterfaceClass = USB_INTERFACE_CLASS_HID,		\
+	.bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE	\
+}
+
+/* table of devices that work with this driver */
+static const struct usb_device_id bcm5974_table[] = {
+	/* MacbookAir1.1 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS),
+	/* MacbookProPenryn */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS),
+	/* Macbook5,1 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS),
+	/* MacbookAir3,2 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS),
+	/* MacbookAir3,1 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS),
+	/* MacbookPro8 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS),
+	/* MacbookAir4,1 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS),
+	/* MacbookAir4,2 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_JIS),
+	/* MacbookPro8,2 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS),
+	/* MacbookPro10,1 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_JIS),
+	/* MacbookPro10,2 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS),
+	/* MacbookAir6,2 */
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ISO),
+	BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_JIS),
+	/* Terminating entry */
+	{}
+};
+MODULE_DEVICE_TABLE(usb, bcm5974_table);
+
+MODULE_AUTHOR("Henrik Rydberg");
+MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver");
+MODULE_LICENSE("GPL");
+
+#define dprintk(level, format, a...)\
+	{ if (debug >= level) printk(KERN_DEBUG format, ##a); }
+
+static int debug = 1;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Activate debugging output");
+
+/* button data structure */
+struct bt_data {
+	u8 unknown1;		/* constant */
+	u8 button;		/* left button */
+	u8 rel_x;		/* relative x coordinate */
+	u8 rel_y;		/* relative y coordinate */
+};
+
+/* trackpad header types */
+enum tp_type {
+	TYPE1,			/* plain trackpad */
+	TYPE2,			/* button integrated in trackpad */
+	TYPE3			/* additional header fields since June 2013 */
+};
+
+/* trackpad finger data offsets, le16-aligned */
+#define FINGER_TYPE1		(13 * sizeof(__le16))
+#define FINGER_TYPE2		(15 * sizeof(__le16))
+#define FINGER_TYPE3		(19 * sizeof(__le16))
+
+/* trackpad button data offsets */
+#define BUTTON_TYPE2		15
+#define BUTTON_TYPE3		23
+
+/* list of device capability bits */
+#define HAS_INTEGRATED_BUTTON	1
+
+/* trackpad finger structure, le16-aligned */
+struct tp_finger {
+	__le16 origin;		/* zero when switching track finger */
+	__le16 abs_x;		/* absolute x coodinate */
+	__le16 abs_y;		/* absolute y coodinate */
+	__le16 rel_x;		/* relative x coodinate */
+	__le16 rel_y;		/* relative y coodinate */
+	__le16 tool_major;	/* tool area, major axis */
+	__le16 tool_minor;	/* tool area, minor axis */
+	__le16 orientation;	/* 16384 when point, else 15 bit angle */
+	__le16 touch_major;	/* touch area, major axis */
+	__le16 touch_minor;	/* touch area, minor axis */
+	__le16 unused[3];	/* zeros */
+	__le16 multi;		/* one finger: varies, more fingers: constant */
+} __attribute__((packed,aligned(2)));
+
+/* trackpad finger data size, empirically at least ten fingers */
+#define MAX_FINGERS		16
+#define SIZEOF_FINGER		sizeof(struct tp_finger)
+#define SIZEOF_ALL_FINGERS	(MAX_FINGERS * SIZEOF_FINGER)
+#define MAX_FINGER_ORIENTATION	16384
+
+/* device-specific parameters */
+struct bcm5974_param {
+	int snratio;		/* signal-to-noise ratio */
+	int min;		/* device minimum reading */
+	int max;		/* device maximum reading */
+};
+
+/* device-specific configuration */
+struct bcm5974_config {
+	int ansi, iso, jis;	/* the product id of this device */
+	int caps;		/* device capability bitmask */
+	int bt_ep;		/* the endpoint of the button interface */
+	int bt_datalen;		/* data length of the button interface */
+	int tp_ep;		/* the endpoint of the trackpad interface */
+	enum tp_type tp_type;	/* type of trackpad interface */
+	int tp_offset;		/* offset to trackpad finger data */
+	int tp_datalen;		/* data length of the trackpad interface */
+	struct bcm5974_param p;	/* finger pressure limits */
+	struct bcm5974_param w;	/* finger width limits */
+	struct bcm5974_param x;	/* horizontal limits */
+	struct bcm5974_param y;	/* vertical limits */
+	struct bcm5974_param o;	/* orientation limits */
+};
+
+/* logical device structure */
+struct bcm5974 {
+	char phys[64];
+	struct usb_device *udev;	/* usb device */
+	struct usb_interface *intf;	/* our interface */
+	struct input_dev *input;	/* input dev */
+	struct bcm5974_config cfg;	/* device configuration */
+	struct mutex pm_mutex;		/* serialize access to open/suspend */
+	int opened;			/* 1: opened, 0: closed */
+	struct urb *bt_urb;		/* button usb request block */
+	struct bt_data *bt_data;	/* button transferred data */
+	struct urb *tp_urb;		/* trackpad usb request block */
+	u8 *tp_data;			/* trackpad transferred data */
+	const struct tp_finger *index[MAX_FINGERS];	/* finger index data */
+	struct input_mt_pos pos[MAX_FINGERS];		/* position array */
+	int slots[MAX_FINGERS];				/* slot assignments */
+};
+
+/* logical signal quality */
+#define SN_PRESSURE	45		/* pressure signal-to-noise ratio */
+#define SN_WIDTH	25		/* width signal-to-noise ratio */
+#define SN_COORD	250		/* coordinate signal-to-noise ratio */
+#define SN_ORIENT	10		/* orientation signal-to-noise ratio */
+
+/* device constants */
+static const struct bcm5974_config bcm5974_config_table[] = {
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
+		0,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 256 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4824, 5342 },
+		{ SN_COORD, -172, 5820 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
+		0,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 256 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4824, 4824 },
+		{ SN_COORD, -172, 4290 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING3_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING3_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4460, 5166 },
+		{ SN_COORD, -75, 6700 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING4_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING4_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4620, 5140 },
+		{ SN_COORD, -150, 6600 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4616, 5112 },
+		{ SN_COORD, -142, 5234 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING5_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING5_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4415, 5050 },
+		{ SN_COORD, -55, 6680 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING6_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING6_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4620, 5140 },
+		{ SN_COORD, -150, 6600 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4750, 5280 },
+		{ SN_COORD, -150, 6730 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4620, 5140 },
+		{ SN_COORD, -150, 6600 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING7_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING7_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4750, 5280 },
+		{ SN_COORD, -150, 6730 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0x84, sizeof(struct bt_data),
+		0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4750, 5280 },
+		{ SN_COORD, -150, 6730 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{
+		USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI,
+		USB_DEVICE_ID_APPLE_WELLSPRING8_ISO,
+		USB_DEVICE_ID_APPLE_WELLSPRING8_JIS,
+		HAS_INTEGRATED_BUTTON,
+		0, sizeof(struct bt_data),
+		0x83, TYPE3, FINGER_TYPE3, FINGER_TYPE3 + SIZEOF_ALL_FINGERS,
+		{ SN_PRESSURE, 0, 300 },
+		{ SN_WIDTH, 0, 2048 },
+		{ SN_COORD, -4620, 5140 },
+		{ SN_COORD, -150, 6600 },
+		{ SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
+	},
+	{}
+};
+
+/* return the device-specific configuration by device */
+static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
+{
+	u16 id = le16_to_cpu(udev->descriptor.idProduct);
+	const struct bcm5974_config *cfg;
+
+	for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
+		if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
+			return cfg;
+
+	return bcm5974_config_table;
+}
+
+/* convert 16-bit little endian to signed integer */
+static inline int raw2int(__le16 x)
+{
+	return (signed short)le16_to_cpu(x);
+}
+
+static void set_abs(struct input_dev *input, unsigned int code,
+		    const struct bcm5974_param *p)
+{
+	int fuzz = p->snratio ? (p->max - p->min) / p->snratio : 0;
+	input_set_abs_params(input, code, p->min, p->max, fuzz, 0);
+}
+
+/* setup which logical events to report */
+static void setup_events_to_report(struct input_dev *input_dev,
+				   const struct bcm5974_config *cfg)
+{
+	__set_bit(EV_ABS, input_dev->evbit);
+
+	/* for synaptics only */
+	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 256, 5, 0);
+	input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 16, 0, 0);
+
+	/* finger touch area */
+	set_abs(input_dev, ABS_MT_TOUCH_MAJOR, &cfg->w);
+	set_abs(input_dev, ABS_MT_TOUCH_MINOR, &cfg->w);
+	/* finger approach area */
+	set_abs(input_dev, ABS_MT_WIDTH_MAJOR, &cfg->w);
+	set_abs(input_dev, ABS_MT_WIDTH_MINOR, &cfg->w);
+	/* finger orientation */
+	set_abs(input_dev, ABS_MT_ORIENTATION, &cfg->o);
+	/* finger position */
+	set_abs(input_dev, ABS_MT_POSITION_X, &cfg->x);
+	set_abs(input_dev, ABS_MT_POSITION_Y, &cfg->y);
+
+	__set_bit(EV_KEY, input_dev->evbit);
+	__set_bit(BTN_LEFT, input_dev->keybit);
+
+	if (cfg->caps & HAS_INTEGRATED_BUTTON)
+		__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+
+	input_mt_init_slots(input_dev, MAX_FINGERS,
+		INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK);
+}
+
+/* report button data as logical button state */
+static int report_bt_state(struct bcm5974 *dev, int size)
+{
+	if (size != sizeof(struct bt_data))
+		return -EIO;
+
+	dprintk(7,
+		"bcm5974: button data: %x %x %x %x\n",
+		dev->bt_data->unknown1, dev->bt_data->button,
+		dev->bt_data->rel_x, dev->bt_data->rel_y);
+
+	input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
+	input_sync(dev->input);
+
+	return 0;
+}
+
+static void report_finger_data(struct input_dev *input, int slot,
+			       const struct input_mt_pos *pos,
+			       const struct tp_finger *f)
+{
+	input_mt_slot(input, slot);
+	input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+
+	input_report_abs(input, ABS_MT_TOUCH_MAJOR,
+			 raw2int(f->touch_major) << 1);
+	input_report_abs(input, ABS_MT_TOUCH_MINOR,
+			 raw2int(f->touch_minor) << 1);
+	input_report_abs(input, ABS_MT_WIDTH_MAJOR,
+			 raw2int(f->tool_major) << 1);
+	input_report_abs(input, ABS_MT_WIDTH_MINOR,
+			 raw2int(f->tool_minor) << 1);
+	input_report_abs(input, ABS_MT_ORIENTATION,
+			 MAX_FINGER_ORIENTATION - raw2int(f->orientation));
+	input_report_abs(input, ABS_MT_POSITION_X, pos->x);
+	input_report_abs(input, ABS_MT_POSITION_Y, pos->y);
+}
+
+static void report_synaptics_data(struct input_dev *input,
+				  const struct bcm5974_config *cfg,
+				  const struct tp_finger *f, int raw_n)
+{
+	int abs_p = 0, abs_w = 0;
+
+	if (raw_n) {
+		int p = raw2int(f->touch_major);
+		int w = raw2int(f->tool_major);
+		if (p > 0 && raw2int(f->origin)) {
+			abs_p = clamp_val(256 * p / cfg->p.max, 0, 255);
+			abs_w = clamp_val(16 * w / cfg->w.max, 0, 15);
+		}
+	}
+
+	input_report_abs(input, ABS_PRESSURE, abs_p);
+	input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
+}
+
+/* report trackpad data as logical trackpad state */
+static int report_tp_state(struct bcm5974 *dev, int size)
+{
+	const struct bcm5974_config *c = &dev->cfg;
+	const struct tp_finger *f;
+	struct input_dev *input = dev->input;
+	int raw_n, i, n = 0;
+
+	if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0)
+		return -EIO;
+
+	/* finger data, le16-aligned */
+	f = (const struct tp_finger *)(dev->tp_data + c->tp_offset);
+	raw_n = (size - c->tp_offset) / SIZEOF_FINGER;
+
+	for (i = 0; i < raw_n; i++) {
+		if (raw2int(f[i].touch_major) == 0)
+			continue;
+		dev->pos[n].x = raw2int(f[i].abs_x);
+		dev->pos[n].y = c->y.min + c->y.max - raw2int(f[i].abs_y);
+		dev->index[n++] = &f[i];
+	}
+
+	input_mt_assign_slots(input, dev->slots, dev->pos, n, 0);
+
+	for (i = 0; i < n; i++)
+		report_finger_data(input, dev->slots[i],
+				   &dev->pos[i], dev->index[i]);
+
+	input_mt_sync_frame(input);
+
+	report_synaptics_data(input, c, f, raw_n);
+
+	/* type 2 reports button events via ibt only */
+	if (c->tp_type == TYPE2) {
+		int ibt = raw2int(dev->tp_data[BUTTON_TYPE2]);
+		input_report_key(input, BTN_LEFT, ibt);
+	}
+
+	if (c->tp_type == TYPE3)
+		input_report_key(input, BTN_LEFT, dev->tp_data[BUTTON_TYPE3]);
+
+	input_sync(input);
+
+	return 0;
+}
+
+/* Wellspring initialization constants */
+#define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID		1
+#define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID	9
+#define BCM5974_WELLSPRING_MODE_REQUEST_VALUE		0x300
+#define BCM5974_WELLSPRING_MODE_REQUEST_INDEX		0
+#define BCM5974_WELLSPRING_MODE_VENDOR_VALUE		0x01
+#define BCM5974_WELLSPRING_MODE_NORMAL_VALUE		0x08
+
+static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
+{
+	int retval = 0, size;
+	char *data;
+
+	/* Type 3 does not require a mode switch */
+	if (dev->cfg.tp_type == TYPE3)
+		return 0;
+
+	data = kmalloc(8, GFP_KERNEL);
+	if (!data) {
+		dev_err(&dev->intf->dev, "out of memory\n");
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	/* read configuration */
+	size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
+			BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
+			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
+			BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
+
+	if (size != 8) {
+		dev_err(&dev->intf->dev, "could not read from device\n");
+		retval = -EIO;
+		goto out;
+	}
+
+	/* apply the mode switch */
+	data[0] = on ?
+		BCM5974_WELLSPRING_MODE_VENDOR_VALUE :
+		BCM5974_WELLSPRING_MODE_NORMAL_VALUE;
+
+	/* write configuration */
+	size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+			BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
+			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
+			BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
+
+	if (size != 8) {
+		dev_err(&dev->intf->dev, "could not write to device\n");
+		retval = -EIO;
+		goto out;
+	}
+
+	dprintk(2, "bcm5974: switched to %s mode.\n",
+		on ? "wellspring" : "normal");
+
+ out:
+	kfree(data);
+	return retval;
+}
+
+static void bcm5974_irq_button(struct urb *urb)
+{
+	struct bcm5974 *dev = urb->context;
+	struct usb_interface *intf = dev->intf;
+	int error;
+
+	switch (urb->status) {
+	case 0:
+		break;
+	case -EOVERFLOW:
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		dev_dbg(&intf->dev, "button urb shutting down: %d\n",
+			urb->status);
+		return;
+	default:
+		dev_dbg(&intf->dev, "button urb status: %d\n", urb->status);
+		goto exit;
+	}
+
+	if (report_bt_state(dev, dev->bt_urb->actual_length))
+		dprintk(1, "bcm5974: bad button package, length: %d\n",
+			dev->bt_urb->actual_length);
+
+exit:
+	error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
+	if (error)
+		dev_err(&intf->dev, "button urb failed: %d\n", error);
+}
+
+static void bcm5974_irq_trackpad(struct urb *urb)
+{
+	struct bcm5974 *dev = urb->context;
+	struct usb_interface *intf = dev->intf;
+	int error;
+
+	switch (urb->status) {
+	case 0:
+		break;
+	case -EOVERFLOW:
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		dev_dbg(&intf->dev, "trackpad urb shutting down: %d\n",
+			urb->status);
+		return;
+	default:
+		dev_dbg(&intf->dev, "trackpad urb status: %d\n", urb->status);
+		goto exit;
+	}
+
+	/* control response ignored */
+	if (dev->tp_urb->actual_length == 2)
+		goto exit;
+
+	if (report_tp_state(dev, dev->tp_urb->actual_length))
+		dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
+			dev->tp_urb->actual_length);
+
+exit:
+	error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
+	if (error)
+		dev_err(&intf->dev, "trackpad urb failed: %d\n", error);
+}
+
+/*
+ * The Wellspring trackpad, like many recent Apple trackpads, share
+ * the usb device with the keyboard. Since keyboards are usually
+ * handled by the HID system, the device ends up being handled by two
+ * modules. Setting up the device therefore becomes slightly
+ * complicated. To enable multitouch features, a mode switch is
+ * required, which is usually applied via the control interface of the
+ * device.  It can be argued where this switch should take place. In
+ * some drivers, like appletouch, the switch is made during
+ * probe. However, the hid module may also alter the state of the
+ * device, resulting in trackpad malfunction under certain
+ * circumstances. To get around this problem, there is at least one
+ * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
+ * receive a reset_resume request rather than the normal resume.
+ * Since the implementation of reset_resume is equal to mode switch
+ * plus start_traffic, it seems easier to always do the switch when
+ * starting traffic on the device.
+ */
+static int bcm5974_start_traffic(struct bcm5974 *dev)
+{
+	int error;
+
+	error = bcm5974_wellspring_mode(dev, true);
+	if (error) {
+		dprintk(1, "bcm5974: mode switch failed\n");
+		goto err_out;
+	}
+
+	if (dev->bt_urb) {
+		error = usb_submit_urb(dev->bt_urb, GFP_KERNEL);
+		if (error)
+			goto err_reset_mode;
+	}
+
+	error = usb_submit_urb(dev->tp_urb, GFP_KERNEL);
+	if (error)
+		goto err_kill_bt;
+
+	return 0;
+
+err_kill_bt:
+	usb_kill_urb(dev->bt_urb);
+err_reset_mode:
+	bcm5974_wellspring_mode(dev, false);
+err_out:
+	return error;
+}
+
+static void bcm5974_pause_traffic(struct bcm5974 *dev)
+{
+	usb_kill_urb(dev->tp_urb);
+	usb_kill_urb(dev->bt_urb);
+	bcm5974_wellspring_mode(dev, false);
+}
+
+/*
+ * The code below implements open/close and manual suspend/resume.
+ * All functions may be called in random order.
+ *
+ * Opening a suspended device fails with EACCES - permission denied.
+ *
+ * Failing a resume leaves the device resumed but closed.
+ */
+static int bcm5974_open(struct input_dev *input)
+{
+	struct bcm5974 *dev = input_get_drvdata(input);
+	int error;
+
+	error = usb_autopm_get_interface(dev->intf);
+	if (error)
+		return error;
+
+	mutex_lock(&dev->pm_mutex);
+
+	error = bcm5974_start_traffic(dev);
+	if (!error)
+		dev->opened = 1;
+
+	mutex_unlock(&dev->pm_mutex);
+
+	if (error)
+		usb_autopm_put_interface(dev->intf);
+
+	return error;
+}
+
+static void bcm5974_close(struct input_dev *input)
+{
+	struct bcm5974 *dev = input_get_drvdata(input);
+
+	mutex_lock(&dev->pm_mutex);
+
+	bcm5974_pause_traffic(dev);
+	dev->opened = 0;
+
+	mutex_unlock(&dev->pm_mutex);
+
+	usb_autopm_put_interface(dev->intf);
+}
+
+static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
+{
+	struct bcm5974 *dev = usb_get_intfdata(iface);
+
+	mutex_lock(&dev->pm_mutex);
+
+	if (dev->opened)
+		bcm5974_pause_traffic(dev);
+
+	mutex_unlock(&dev->pm_mutex);
+
+	return 0;
+}
+
+static int bcm5974_resume(struct usb_interface *iface)
+{
+	struct bcm5974 *dev = usb_get_intfdata(iface);
+	int error = 0;
+
+	mutex_lock(&dev->pm_mutex);
+
+	if (dev->opened)
+		error = bcm5974_start_traffic(dev);
+
+	mutex_unlock(&dev->pm_mutex);
+
+	return error;
+}
+
+static int bcm5974_probe(struct usb_interface *iface,
+			 const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(iface);
+	const struct bcm5974_config *cfg;
+	struct bcm5974 *dev;
+	struct input_dev *input_dev;
+	int error = -ENOMEM;
+
+	/* find the product index */
+	cfg = bcm5974_get_config(udev);
+
+	/* allocate memory for our device state and initialize it */
+	dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!dev || !input_dev) {
+		dev_err(&iface->dev, "out of memory\n");
+		goto err_free_devs;
+	}
+
+	dev->udev = udev;
+	dev->intf = iface;
+	dev->input = input_dev;
+	dev->cfg = *cfg;
+	mutex_init(&dev->pm_mutex);
+
+	/* setup urbs */
+	if (cfg->tp_type == TYPE1) {
+		dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
+		if (!dev->bt_urb)
+			goto err_free_devs;
+	}
+
+	dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dev->tp_urb)
+		goto err_free_bt_urb;
+
+	if (dev->bt_urb) {
+		dev->bt_data = usb_alloc_coherent(dev->udev,
+					  dev->cfg.bt_datalen, GFP_KERNEL,
+					  &dev->bt_urb->transfer_dma);
+		if (!dev->bt_data)
+			goto err_free_urb;
+	}
+
+	dev->tp_data = usb_alloc_coherent(dev->udev,
+					  dev->cfg.tp_datalen, GFP_KERNEL,
+					  &dev->tp_urb->transfer_dma);
+	if (!dev->tp_data)
+		goto err_free_bt_buffer;
+
+	if (dev->bt_urb)
+		usb_fill_int_urb(dev->bt_urb, udev,
+				 usb_rcvintpipe(udev, cfg->bt_ep),
+				 dev->bt_data, dev->cfg.bt_datalen,
+				 bcm5974_irq_button, dev, 1);
+
+	usb_fill_int_urb(dev->tp_urb, udev,
+			 usb_rcvintpipe(udev, cfg->tp_ep),
+			 dev->tp_data, dev->cfg.tp_datalen,
+			 bcm5974_irq_trackpad, dev, 1);
+
+	/* create bcm5974 device */
+	usb_make_path(udev, dev->phys, sizeof(dev->phys));
+	strlcat(dev->phys, "/input0", sizeof(dev->phys));
+
+	input_dev->name = "bcm5974";
+	input_dev->phys = dev->phys;
+	usb_to_input_id(dev->udev, &input_dev->id);
+	/* report driver capabilities via the version field */
+	input_dev->id.version = cfg->caps;
+	input_dev->dev.parent = &iface->dev;
+
+	input_set_drvdata(input_dev, dev);
+
+	input_dev->open = bcm5974_open;
+	input_dev->close = bcm5974_close;
+
+	setup_events_to_report(input_dev, cfg);
+
+	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_free_coherent(dev->udev, dev->cfg.tp_datalen,
+		dev->tp_data, dev->tp_urb->transfer_dma);
+err_free_bt_buffer:
+	if (dev->bt_urb)
+		usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
+				  dev->bt_data, dev->bt_urb->transfer_dma);
+err_free_urb:
+	usb_free_urb(dev->tp_urb);
+err_free_bt_urb:
+	usb_free_urb(dev->bt_urb);
+err_free_devs:
+	usb_set_intfdata(iface, NULL);
+	input_free_device(input_dev);
+	kfree(dev);
+	return error;
+}
+
+static void bcm5974_disconnect(struct usb_interface *iface)
+{
+	struct bcm5974 *dev = usb_get_intfdata(iface);
+
+	usb_set_intfdata(iface, NULL);
+
+	input_unregister_device(dev->input);
+	usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
+			  dev->tp_data, dev->tp_urb->transfer_dma);
+	if (dev->bt_urb)
+		usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
+				  dev->bt_data, dev->bt_urb->transfer_dma);
+	usb_free_urb(dev->tp_urb);
+	usb_free_urb(dev->bt_urb);
+	kfree(dev);
+}
+
+static struct usb_driver bcm5974_driver = {
+	.name			= "bcm5974",
+	.probe			= bcm5974_probe,
+	.disconnect		= bcm5974_disconnect,
+	.suspend		= bcm5974_suspend,
+	.resume			= bcm5974_resume,
+	.id_table		= bcm5974_table,
+	.supports_autosuspend	= 1,
+};
+
+module_usb_driver(bcm5974_driver);