[RFC PATCH 0/3] Support Apple Magic Mouse

[RFC PATCH 0/3] Support Apple Magic Mouse

[Michael Poole]

he Magic Mouse uses a vendor-specific code page to turn on its
multi-touch support, and then reports that with an "unlisted"
input report.  The first two patches in this series allow the
driver to (respectively) register for and enable those reports.

The third patch is the driver itself.  The major and minor axis
lengths use what the device sends, and the units for those are
larger than for the touch resolution.  I'm not sure how hard a
rule it is that those be in surface units.

 drivers/hid/Kconfig           |   10 +
 drivers/hid/Makefile          |    1 +
 drivers/hid/hid-core.c        |    4 +-
 drivers/hid/hid-ids.h         |    1 +
 drivers/hid/hid-magicmouse.c  |  395 +++++++++++++++++++++++++++++++++++++++++
 drivers/hid/usbhid/hid-core.c |   23 +++
 include/linux/hid.h           |    5 +
 net/bluetooth/hidp/core.c     |   25 +++
 8 files changed, 463 insertions(+), 1 deletions(-)

[RFC PATCH 1/3] Export hid_register_report().

[Michael Poole]

The Apple Magic Mouse (and probably other devices) publish reports that
are not called out in their HID report descriptors -- they only send them
when enabled through other writes to the device.  This allows a driver to
handle these unlisted reports.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
 drivers/hid/hid-core.c |    3 ++-
 include/linux/hid.h    |    1 +
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index eabe5f8..e39055b 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -51,7 +51,7 @@ EXPORT_SYMBOL_GPL(hid_debug);
  * Register a new report for a device.
  */
 
-static struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
+struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
 {
 	struct hid_report_enum *report_enum = device->report_enum + type;
 	struct hid_report *report;
@@ -75,6 +75,7 @@ static struct hid_report *hid_register_report(struct hid_device *device, unsigne
 
 	return report;
 }
+EXPORT_SYMBOL_GPL(hid_register_report);
 
 /*
  * Register a new field for this report.
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 8709365..c411983 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -690,6 +690,7 @@ int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 void hid_output_report(struct hid_report *report, __u8 *data);
 struct hid_device *hid_allocate_device(void);
+struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 int hid_check_keys_pressed(struct hid_device *hid);
 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
-- 
1.6.5.6

[RFC PATCH 2/3] Add a hid_ll_driver.hid_set_report() function.

[Michael Poole]

This allows a HID device driver to send a Set_Report(Output) or
Set_Report(Feature) message to its device.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
 drivers/hid/usbhid/hid-core.c |   23 +++++++++++++++++++++++
 include/linux/hid.h           |    4 ++++
 net/bluetooth/hidp/core.c     |   25 +++++++++++++++++++++++++
 3 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index e2997a8..d3d2a6e 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1067,6 +1067,28 @@ static int usbhid_power(struct hid_device *hid, int lvl)
 	return r;
 }
 
+static int usbhid_set_report(struct hid_device *hid, int type,
+	__u8 *buf, int count)
+{
+	struct usb_device *dev = hid_to_usb_dev(hid);
+	struct usbhid_device *usbhid = hid->driver_data;
+	struct usb_interface *intf = usbhid->intf;
+	struct usb_host_interface *interface = intf->cur_altsetting;
+	int ret;
+
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		HID_REQ_SET_REPORT,
+		USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+		((type + 1) << 8) | *buf,
+		interface->desc.bInterfaceNumber, buf + 1, count - 1,
+		USB_CTRL_SET_TIMEOUT);
+
+	if (ret > 0)
+		ret++;
+
+	return ret;
+}
+
 static struct hid_ll_driver usb_hid_driver = {
 	.parse = usbhid_parse,
 	.start = usbhid_start,
@@ -1075,6 +1097,7 @@ static struct hid_ll_driver usb_hid_driver = {
 	.close = usbhid_close,
 	.power = usbhid_power,
 	.hidinput_input_event = usb_hidinput_input_event,
+	.hid_set_report = usbhid_set_report,
 };
 
 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
diff --git a/include/linux/hid.h b/include/linux/hid.h
index c411983..07154bb 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -642,6 +642,7 @@ struct hid_driver {
  * @hidinput_input_event: event input event (e.g. ff or leds)
  * @parse: this method is called only once to parse the device data,
  *	   shouldn't allocate anything to not leak memory
+ * @hid_set_report: sends a SET_REPORT request to the device
  */
 struct hid_ll_driver {
 	int (*start)(struct hid_device *hdev);
@@ -656,6 +657,9 @@ struct hid_ll_driver {
 			unsigned int code, int value);
 
 	int (*parse)(struct hid_device *hdev);
+
+	int (*hid_set_report) (struct hid_device *hdev, int type,
+			__u8 *buf, int count);
 };
 
 #define	PM_HINT_FULLON	1<<5
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 18e7f5a..91b0ca4 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -752,6 +752,30 @@ static void hidp_stop(struct hid_device *hid)
 	hid->claimed = 0;
 }
 
+static int hidp_set_report(struct hid_device *hid, int type,
+	__u8 *data, int size)
+{
+	struct hidp_session *session = hid->driver_data;
+	struct sk_buff *skb;
+
+	BT_DBG("session %p hid %p data %p size %d", session, hid, data, size);
+
+	if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
+		BT_ERR("Can't allocate memory for new frame");
+		return -ENOMEM;
+	}
+
+	*skb_put(skb, 1) = 0xa0 | (type + 1);
+	if (size > 0)
+		memcpy(skb_put(skb, size), data, size);
+
+	skb_queue_tail(&session->intr_transmit, skb);
+
+	hidp_schedule(session);
+
+	return 0;
+}
+
 static struct hid_ll_driver hidp_hid_driver = {
 	.parse = hidp_parse,
 	.start = hidp_start,
@@ -759,6 +783,7 @@ static struct hid_ll_driver hidp_hid_driver = {
 	.open  = hidp_open,
 	.close = hidp_close,
 	.hidinput_input_event = hidp_hidinput_event,
+	.hid_set_report = hidp_set_report,
 };
 
 static int hidp_setup_hid(struct hidp_session *session,
-- 
1.6.5.6

[RFC PATCH 3/3] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
 drivers/hid/Kconfig          |   10 +
 drivers/hid/Makefile         |    1 +
 drivers/hid/hid-core.c       |    1 +
 drivers/hid/hid-ids.h        |    1 +
 drivers/hid/hid-magicmouse.c |  395 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 408 insertions(+), 0 deletions(-)
 create mode 100644 drivers/hid/hid-magicmouse.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 24d90ea..a3d503f 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -183,6 +183,16 @@ config LOGIRUMBLEPAD2_FF
 	  Say Y here if you want to enable force feedback support for Logitech
 	  Rumblepad 2 devices.
 
+config HID_MAGICMOUSE
+	tristate "Apple" if EMBEDDED
+	depends on (USB_HID || BT_HIDP)
+	default !EMBEDDED
+	---help---
+	Support for the Apple Magic Mouse.
+
+	Say Y here if you want support for the multi-touch features of the
+	Apple Wireless "Magic" Mouse.
+
 config HID_MICROSOFT
 	tristate "Microsoft" if EMBEDDED
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 0de2dff..45d81e9 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_HID_GYRATION)	+= hid-gyration.o
 obj-$(CONFIG_HID_KENSINGTON)	+= hid-kensington.o
 obj-$(CONFIG_HID_KYE)		+= hid-kye.o
 obj-$(CONFIG_HID_LOGITECH)	+= hid-logitech.o
+obj-$(CONFIG_HID_MAGICMOUSE)    += hid-magicmouse.o
 obj-$(CONFIG_HID_MICROSOFT)	+= hid-microsoft.o
 obj-$(CONFIG_HID_MONTEREY)	+= hid-monterey.o
 obj-$(CONFIG_HID_NTRIG)		+= hid-ntrig.o
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index e39055b..f23ca76 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1254,6 +1254,7 @@ static const struct hid_device_id hid_blacklist[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 010368e..11e5218 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -56,6 +56,7 @@
 
 #define USB_VENDOR_ID_APPLE		0x05ac
 #define USB_DEVICE_ID_APPLE_MIGHTYMOUSE	0x0304
+#define USB_DEVICE_ID_APPLE_MAGICMOUSE	0x030d
 #define USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI	0x020e
 #define USB_DEVICE_ID_APPLE_FOUNTAIN_ISO	0x020f
 #define USB_DEVICE_ID_APPLE_GEYSER_ANSI	0x0214
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
new file mode 100644
index 0000000..26a5f47
--- /dev/null
+++ b/drivers/hid/hid-magicmouse.c
@@ -0,0 +1,395 @@
+/*
+ *   Apple "Magic" Wireless Mouse driver
+ *
+ *   Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
+ */
+
+/*
+ * 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.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "hid-ids.h"
+
+static bool emulate_3button = 1;
+module_param(emulate_3button, bool, 0644);
+MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
+
+static int middle_button_start = -350;
+static int middle_button_stop = +350;
+
+static bool emulate_scroll_wheel = 1;
+module_param(emulate_scroll_wheel, bool, 0644);
+MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
+
+static bool report_touches = 1;
+module_param(report_touches, bool, 0644);
+MODULE_PARM_DESC(report_touches, "Emit touch records (otherwise, only use them for emulation)");
+
+static bool report_undeciphered = 0;
+module_param(report_undeciphered, bool, 0644);
+MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
+
+/**
+ * struct magicmouse_sc - Tracks Magic Mouse-specific data.
+ * @last_timestamp: Timestamp from most recent (18-bit) touch report
+ *     (units of milliseconds over short windows, but seems to
+ *     increase faster when there are no touches).
+ * @delta_time: 18-bit difference between the two most recent touch
+ *     reports from the mouse.
+ * @ntouches: Number of touches in most recent touch report.
+ * @touches: Most recent data for a touch, indexed by tracking ID.
+ */
+struct magicmouse_sc {
+	struct input_dev *input;
+	unsigned long quirks;
+
+	int last_timestamp;
+	int delta_time;
+	int ntouches;
+
+	struct {
+		short x;
+		short y;
+		short scroll_y;
+	} touches[16];
+	int tracking_ids[16];
+};
+
+static void magicmouse_emit_buttons(struct magicmouse_sc *msc, u8 state)
+{
+	if (emulate_3button) {
+		/* If some button was pressed before, keep it held
+		 * down.  Otherwise, if there's only one touch, use
+		 * that to override the mouse's guess.
+		 */
+		if (!state) {
+			/* The button was released. */
+		} else if (test_bit(BTN_LEFT, msc->input->key) ||
+			   test_bit(BTN_RIGHT, msc->input->key) ||
+			   test_bit(BTN_MIDDLE, msc->input->key)) {
+			state = test_bit(BTN_LEFT, msc->input->key) |
+				test_bit(BTN_RIGHT, msc->input->key) << 1 |
+				test_bit(BTN_MIDDLE, msc->input->key) << 2;
+		} else if (msc->ntouches == 1) {
+			int id = msc->tracking_ids[0];
+			int x = msc->touches[id].x;
+			if (x < middle_button_start)
+				state = 1;
+			else if (x > middle_button_stop)
+				state = 2;
+			else
+				state = 4;
+		}
+
+		input_report_key(msc->input, BTN_MIDDLE, state & 4);
+	}
+
+	input_report_key(msc->input, BTN_LEFT, state & 1);
+	input_report_key(msc->input, BTN_RIGHT, state & 2);
+}
+
+static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
+{
+	struct input_dev *input = msc->input;
+	__s32 x_y = tdata[0] << 8 | tdata[1] << 16 | tdata[2] << 24;
+	__u16 misc = tdata[5] | tdata[6] << 8;
+	int id = (misc >> 6) & 15;
+	int x = x_y << 12 >> 20;
+	int y = -(x_y >> 20);
+
+	/* Store tracking ID sequence. */
+	msc->tracking_ids[raw_id] = id;
+
+	/* If requested, emulate a scroll wheel by detecting small
+	 * vertical touch motions near the middle-button area.
+	 */
+	if (emulate_scroll_wheel && y < 0 &&
+	    middle_button_start < x && x < middle_button_stop) {
+		int step = (msc->touches[id].scroll_y - y) / 128;
+
+		if ((tdata[7] & 0xf0) != 0x40) {
+			msc->touches[id].scroll_y = y;
+		} else if (step != 0) {
+			msc->touches[id].scroll_y = y;
+			input_report_rel(input, REL_WHEEL, step);
+		}
+	}
+
+	/* Stash the coordinates that we might use later. */
+	msc->touches[id].x = x;
+	msc->touches[id].y = y;
+
+	/* Generate the input events for this touch. */
+	if (report_touches) {
+		input_report_abs(input, ABS_MT_TRACKING_ID, id);
+		input_report_abs(input, ABS_MT_TOUCH_MAJOR, tdata[3]);
+		input_report_abs(input, ABS_MT_TOUCH_MINOR, tdata[4]);
+		input_report_abs(input, ABS_MT_ORIENTATION, (int)(misc >> 10) - 32);
+		input_report_abs(input, ABS_MT_POSITION_X, x);
+		input_report_abs(input, ABS_MT_POSITION_Y, y);
+		input_mt_sync(input);
+	}
+
+	if (report_undeciphered) {
+		input_event(input, EV_MSC, MSC_RAW, tdata[7]);
+	}
+}
+
+static int magicmouse_raw_event(struct hid_device *hdev,
+		struct hid_report *report, u8 *data, int size)
+{
+	struct magicmouse_sc *msc = hid_get_drvdata(hdev);
+	struct input_dev *input = msc->input;
+	int ts;
+	int ii;
+
+	switch (data[0]) {
+	case 0x10:
+		if (size != 6)
+			return 0;
+		magicmouse_emit_buttons(msc, data[1] & 3);
+		input_report_rel(input, REL_X, (short)(data[2] | data[3] << 8));
+		input_report_rel(input, REL_Y, (short)(data[4] | data[5] << 8));
+		input_sync(input);
+		return 1;
+	case 0x29:
+		/* Expect six bytes of prefix, and N*8 bytes of touch data. */
+		if (size < 6 || ((size - 6) % 8) != 0)
+			return 0;
+		ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
+		msc->delta_time = (ts - msc->last_timestamp) & 0x3ffff;
+		msc->last_timestamp = ts;
+		msc->ntouches = (size - 6) / 8;
+		for (ii = 0; ii < msc->ntouches; ii++)
+			magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
+		/* When emulating three-button mode, it is important
+		 * to have the current touch information before
+		 * generating a click event.
+		 */
+		magicmouse_emit_buttons(msc, data[3] & 3);
+		input_report_rel(input, REL_X, (signed char)data[1]);
+		input_report_rel(input, REL_Y, (signed char)data[2]);
+		input_sync(input);
+		return 1;
+	case 0x20: /* Theoretically battery status (0-100), but I have
+		    * never seen it -- maybe it is only upon request.
+		    */
+	case 0x60: /* Unknown, maybe laser on/off. */
+	case 0x61: /* Laser reflection status change.
+		    * data[1]: 0 = spotted, 1 = lost
+		    */
+	default:
+		return 0;
+	}
+}
+
+static int magicmouse_input_open(struct input_dev *dev)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+
+	return hid->ll_driver->open(hid);
+}
+
+static void magicmouse_input_close(struct input_dev *dev)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+
+	hid->ll_driver->close(hid);
+}
+
+static void magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
+{
+	input_set_drvdata(input, hdev);
+	input->event = hdev->ll_driver->hidinput_input_event;
+	input->open = magicmouse_input_open;
+	input->close = magicmouse_input_close;
+
+	input->name = hdev->name;
+	input->phys = hdev->phys;
+	input->uniq = hdev->uniq;
+	input->id.bustype = hdev->bus;
+	input->id.vendor = hdev->vendor;
+	input->id.product = hdev->product;
+	input->id.version = hdev->version;
+	input->dev.parent = hdev->dev.parent;
+
+	set_bit(EV_KEY, input->evbit);
+	set_bit(BTN_LEFT, input->keybit);
+	set_bit(BTN_RIGHT, input->keybit);
+	if (emulate_3button)
+		set_bit(BTN_MIDDLE, input->keybit);
+	set_bit(BTN_TOOL_FINGER, input->keybit);
+
+	set_bit(EV_REL, input->evbit);
+	set_bit(REL_X, input->relbit);
+	set_bit(REL_Y, input->relbit);
+	if (emulate_scroll_wheel)
+		set_bit(REL_WHEEL, input->relbit);
+
+	if (report_touches) {
+		set_bit(EV_ABS, input->evbit);
+
+		set_bit(ABS_MT_TRACKING_ID, input->absbit);
+		input->absmin[ABS_MT_TRACKING_ID] = 0;
+		input->absmax[ABS_MT_TRACKING_ID] = 15;
+		input->absfuzz[ABS_MT_TRACKING_ID] = 0;
+
+		set_bit(ABS_MT_TOUCH_MAJOR, input->absbit);
+		input->absmin[ABS_MT_TOUCH_MAJOR] = 0;
+		input->absmax[ABS_MT_TOUCH_MAJOR] = 255;
+		input->absfuzz[ABS_MT_TOUCH_MAJOR] = 4;
+
+		set_bit(ABS_MT_TOUCH_MINOR, input->absbit);
+		input->absmin[ABS_MT_TOUCH_MINOR] = 0;
+		input->absmax[ABS_MT_TOUCH_MINOR] = 255;
+		input->absfuzz[ABS_MT_TOUCH_MINOR] = 4;
+
+		set_bit(ABS_MT_ORIENTATION, input->absbit);
+		input->absmin[ABS_MT_ORIENTATION] = -32;
+		input->absmax[ABS_MT_ORIENTATION] = 31;
+		input->absfuzz[ABS_MT_ORIENTATION] = 1;
+
+		set_bit(ABS_MT_POSITION_X, input->absbit);
+		input->absmin[ABS_MT_POSITION_X] = -1100;
+		input->absmax[ABS_MT_POSITION_X] = 1358;
+		input->absfuzz[ABS_MT_POSITION_X] = 4;
+
+		/* Note: Touch Y position from the device is inverted relative
+		 * to how pointer motion is reported (and relative to how USB
+		 * HID recommends the coordinates work).  This driver keeps
+		 * the origin at the same position, and just uses the additive
+		 * inverse of the reported Y.
+		 */
+		set_bit(ABS_MT_POSITION_Y, input->absbit);
+		input->absmin[ABS_MT_POSITION_Y] = -1589;
+		input->absmax[ABS_MT_POSITION_Y] = 2047;
+		input->absfuzz[ABS_MT_POSITION_Y] = 4;
+	}
+
+	if (report_undeciphered) {
+		set_bit(EV_MSC, input->evbit);
+		set_bit(MSC_RAW, input->mscbit);
+	}
+}
+
+static int magicmouse_probe(struct hid_device *hdev,
+	const struct hid_device_id *id)
+{
+	__u8 feature_1[] = { 0xd7, 0x01 };
+	__u8 feature_2[] = { 0xf8, 0x01, 0x32 };
+	struct input_dev *input;
+	struct magicmouse_sc *msc;
+	struct hid_report *report;
+	int ret;
+
+	msc = kzalloc(sizeof(*msc), GFP_KERNEL);
+	if (msc == NULL) {
+		dev_err(&hdev->dev, "can't alloc magicmouse descriptor\n");
+		return -ENOMEM;
+	}
+
+	msc->quirks = id->driver_data;
+	hid_set_drvdata(hdev, msc);
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		dev_err(&hdev->dev, "magicmouse hid parse failed\n");
+		goto err_free;
+	}
+
+	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+	if (ret) {
+		dev_err(&hdev->dev, "magicmouse hw start failed\n");
+		goto err_free;
+	}
+
+	report = hid_register_report(hdev, HID_INPUT_REPORT, 0x29);
+	if (!report) {
+		dev_err(&hdev->dev, "unable to register touch report\n");
+		ret = -ENOMEM;
+		goto err_free;
+	}
+	report->size = 6;
+
+	ret = hdev->ll_driver->hid_set_report(hdev, HID_FEATURE_REPORT,
+			feature_1, sizeof(feature_1));
+	if (!ret) {
+		ret = hdev->ll_driver->hid_set_report(hdev, HID_FEATURE_REPORT,
+				feature_2, sizeof(feature_2));
+	}
+	if (ret) {
+		dev_err(&hdev->dev, "unable to request touch data\n");
+		goto err_free;
+	}
+
+	input = input_allocate_device();
+	if (!input) {
+		dev_err(&hdev->dev, "can't alloc input device\n");
+		ret = -ENOMEM;
+		goto err_free;
+	}
+	magicmouse_setup_input(input, hdev);
+
+	ret = input_register_device(input);
+	if (ret) {
+		dev_err(&hdev->dev, "input device registration failed\n");
+		goto err_both;
+	}
+	msc->input = input;
+
+	return 0;
+ err_both:
+	input_free_device(input);
+ err_free:
+	kfree(msc);
+	return ret;
+}
+
+static void magicmouse_remove(struct hid_device *hdev)
+{
+	hid_hw_stop(hdev);
+	kfree(hid_get_drvdata(hdev));
+}
+
+static const struct hid_device_id magic_mice[] = {
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE),
+		.driver_data = 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, magic_mice);
+
+static struct hid_driver magicmouse_driver = {
+	.name = "magicmouse",
+	.id_table = magic_mice,
+	.probe = magicmouse_probe,
+	.remove = magicmouse_remove,
+	.raw_event = magicmouse_raw_event,
+};
+
+static int __init magicmouse_init(void)
+{
+	int ret;
+
+	ret = hid_register_driver(&magicmouse_driver);
+	if (ret)
+		printk(KERN_ERR "can't register magicmouse driver\n");
+
+	return ret;
+}
+
+static void __exit magicmouse_exit(void)
+{
+	hid_unregister_driver(&magicmouse_driver);
+}
+
+module_init(magicmouse_init);
+module_exit(magicmouse_exit);
+MODULE_LICENSE("GPL");
-- 
1.6.5.6