[PATCH 0/3] HID: make raw output callback more flexible

[PATCH 0/3] HID: make raw output callback more flexible

[Jiri Kosina]

Hi,

this is a followup to the thread

	"Implement Bluetooth Wacom tablet's mode change in the kernel"

First patch alters the raw output API so that it is able to actually 
distinguish between feature and output reports (and modifies low-level 
drivers accordingly), and the two followup patches make use of this for 
in-kernel mode setting of Sony and Wacom bluetooth devices.

Marcel, could you please review the Bluetooth part?

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH 1/3] HID: make raw reports possible for both feature and output reports

[Jiri Kosina]

In commit 2da31939a42f7a676a0bc5155d6a0a39ed8451f2 ("Bluetooth: Implement raw
output support for HIDP layer"), support for Bluetooth
hid_output_raw_report was added, but it pushes the data to the intr socket
instead of the ctrl one.

Plus it is necessary to distinguish whether the report in question should be
either FEATURE or OUTPUT. For this, we have to extend the generic HID API,
so that hid_output_raw_report() callback provides means to specify this
value so that it can be passed down to lower level hardware drivers (currently
Bluetooth and USB).

Based on original patch by Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hidraw.c          |    2 +-
 drivers/hid/usbhid/hid-core.c |    5 ++-
 include/linux/hid.h           |    2 +-
 net/bluetooth/hidp/core.c     |   79 +++++++++++++++++++++++------------------
 4 files changed, 49 insertions(+), 39 deletions(-)

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index cdd1369..d044767 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -134,7 +134,7 @@ static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t
 		goto out;
 	}
 
-	ret = dev->hid_output_raw_report(dev, buf, count);
+	ret = dev->hid_output_raw_report(dev, buf, count, HID_OUTPUT_REPORT);
 out:
 	kfree(buf);
 	return ret;
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index e2997a8..caa16c0 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -774,7 +774,8 @@ static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 	return 0;
 }
 
-static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
+static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
+		unsigned char report_type)
 {
 	struct usbhid_device *usbhid = hid->driver_data;
 	struct usb_device *dev = hid_to_usb_dev(hid);
@@ -785,7 +786,7 @@ static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t co
 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 		HID_REQ_SET_REPORT,
 		USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-		((HID_OUTPUT_REPORT + 1) << 8) | *buf,
+		((report_type + 1) << 8) | *buf,
 		interface->desc.bInterfaceNumber, buf + 1, count - 1,
 		USB_CTRL_SET_TIMEOUT);
 
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 8709365..3661a62 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -501,7 +501,7 @@ struct hid_device {							/* device report descriptor */
 	void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 
 	/* handler for raw output data, used by hidraw */
-	int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t);
+	int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 
 	/* debugging support via debugfs */
 	unsigned short debug;
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 18e7f5a..9c88750 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -243,6 +243,39 @@ static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
 	input_sync(dev);
 }
 
+static int __hidp_send_ctrl_message(struct hidp_session *session,
+			unsigned char hdr, unsigned char *data, int size)
+{
+	struct sk_buff *skb;
+
+	BT_DBG("session %p data %p size %d", session, 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) = hdr;
+	if (data && size > 0)
+		memcpy(skb_put(skb, size), data, size);
+
+	skb_queue_tail(&session->ctrl_transmit, skb);
+
+	return 0;
+}
+
+static inline int hidp_send_ctrl_message(struct hidp_session *session,
+			unsigned char hdr, unsigned char *data, int size)
+{
+	int err;
+
+	err = __hidp_send_ctrl_message(session, hdr, data, size);
+
+	hidp_schedule(session);
+
+	return err;
+}
+
 static int hidp_queue_report(struct hidp_session *session,
 				unsigned char *data, int size)
 {
@@ -280,9 +313,18 @@ static int hidp_send_report(struct hidp_session *session, struct hid_report *rep
 	return hidp_queue_report(session, buf, rsize);
 }
 
-static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count)
+static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
+		unsigned char report_type)
 {
-	if (hidp_queue_report(hid->driver_data, data, count))
+	if (report_type == HID_FEATURE_REPORT)
+		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
+	else if (report_type == HID_OUTPUT_REPORT)
+		report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
+	else
+		return -EINVAL;
+
+	if (hidp_send_ctrl_message(hid->driver_data, report_type,
+			data, count))
 		return -ENOMEM;
 	return count;
 }
@@ -307,39 +349,6 @@ static inline void hidp_del_timer(struct hidp_session *session)
 		del_timer(&session->timer);
 }
 
-static int __hidp_send_ctrl_message(struct hidp_session *session,
-			unsigned char hdr, unsigned char *data, int size)
-{
-	struct sk_buff *skb;
-
-	BT_DBG("session %p data %p size %d", session, 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) = hdr;
-	if (data && size > 0)
-		memcpy(skb_put(skb, size), data, size);
-
-	skb_queue_tail(&session->ctrl_transmit, skb);
-
-	return 0;
-}
-
-static inline int hidp_send_ctrl_message(struct hidp_session *session,
-			unsigned char hdr, unsigned char *data, int size)
-{
-	int err;
-
-	err = __hidp_send_ctrl_message(session, hdr, data, size);
-
-	hidp_schedule(session);
-
-	return err;
-}
-
 static void hidp_process_handshake(struct hidp_session *session,
 					unsigned char param)
 {
-- 
1.6.4.2

[PATCH 2/3] HID: Implement Wacom quirk in the kernel

[Jiri Kosina]

From: Bastien Nocera <hadess@hadess.net>

The hid-wacom driver required user-space to poke at the tablet
to make it send data about the cursor location.

This patch makes it do the same thing but in the kernel.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-wacom.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 12dcda5..d7897b5 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -156,7 +156,9 @@ static int wacom_probe(struct hid_device *hdev,
 	struct hid_input *hidinput;
 	struct input_dev *input;
 	struct wacom_data *wdata;
+	char rep_data[2];
 	int ret;
+	int limit;
 
 	wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
 	if (wdata == NULL) {
@@ -166,6 +168,7 @@ static int wacom_probe(struct hid_device *hdev,
 
 	hid_set_drvdata(hdev, wdata);
 
+	/* Parse the HID report now */
 	ret = hid_parse(hdev);
 	if (ret) {
 		dev_err(&hdev->dev, "parse failed\n");
@@ -178,6 +181,30 @@ static int wacom_probe(struct hid_device *hdev,
 		goto err_free;
 	}
 
+	/* Set Wacom mode2 */
+	rep_data[0] = 0x03; rep_data[1] = 0x00;
+	limit =3;
+	do {
+		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+				HID_FEATURE_REPORT);
+	} while (ret < 0 && limit-- > 0);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to poke device #1, %d\n", ret);
+		goto err_free;
+	}
+
+	/* 0x06 - high reporting speed, 0x05 - low speed */
+	rep_data[0] = 0x06; rep_data[1] = 0x00;
+	limit = 3;
+	do {
+		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+				HID_FEATURE_REPORT);
+	} while (ret < 0 && limit-- > 0);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to poke device #2, %d\n", ret);
+		goto err_free;
+	}
+
 	hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
 	input = hidinput->input;
 
-- 
1.6.4.2

Re: [PATCH 2/3] HID: Implement Wacom quirk in the kernel

[Ping Cheng]

[-- Attachment #1: Type: text/plain, Size: 2759 bytes --]

On Fri, Jan 29, 2010 at 6:20 AM, Jiri Kosina <jkosina@suse.cz> wrote:

> From: Bastien Nocera <hadess@hadess.net>
>
> The hid-wacom driver required user-space to poke at the tablet
> to make it send data about the cursor location.
>
> This patch makes it do the same thing but in the kernel.
>
> Signed-off-by: Bastien Nocera <hadess@hadess.net>
> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> ---
>  drivers/hid/hid-wacom.c |   27 +++++++++++++++++++++++++++
>  1 files changed, 27 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
> index 12dcda5..d7897b5 100644
> --- a/drivers/hid/hid-wacom.c
> +++ b/drivers/hid/hid-wacom.c
> @@ -156,7 +156,9 @@ static int wacom_probe(struct hid_device *hdev,
>        struct hid_input *hidinput;
>        struct input_dev *input;
>        struct wacom_data *wdata;
> +       char rep_data[2];
>        int ret;
> +       int limit;
>
>        wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
>        if (wdata == NULL) {
> @@ -166,6 +168,7 @@ static int wacom_probe(struct hid_device *hdev,
>
>        hid_set_drvdata(hdev, wdata);
>
> +       /* Parse the HID report now */
>        ret = hid_parse(hdev);
>        if (ret) {
>                dev_err(&hdev->dev, "parse failed\n");
> @@ -178,6 +181,30 @@ static int wacom_probe(struct hid_device *hdev,
>                goto err_free;
>        }
>
> +       /* Set Wacom mode2 */
> +       rep_data[0] = 0x03; rep_data[1] = 0x00;
> +       limit =3;
> +       do {
> +               ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
> +                               HID_FEATURE_REPORT);
> +       } while (ret < 0 && limit-- > 0);
>

hdev->hid_output_raw_report error is not a hard failure, i.e., the following
four lines are unnecessay. We can continue with the rest of the code.


> +       if (ret < 0) {
> +               dev_err(&hdev->dev, "failed to poke device #1, %d\n", ret);
> +               goto err_free;
> +       }
> +
> +       /* 0x06 - high reporting speed, 0x05 - low speed */
> +       rep_data[0] = 0x06; rep_data[1] = 0x00;
> +       limit = 3;
> +       do {
> +               ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
> +                               HID_FEATURE_REPORT);
> +       } while (ret < 0 && limit-- > 0);
>

Same comments apply here. "/* Note that if query fails it is not a hard
failure */" is the comments we use in the corresponding Wacom USB driver,
wacom_sys.c


> +       if (ret < 0) {
> +               dev_err(&hdev->dev, "failed to poke device #2, %d\n", ret);
> +               goto err_free;
> +       }
> +
>        hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
>        input = hidinput->input;


Everything else looks good to me.

Ping

[-- Attachment #2: Type: text/html, Size: 3730 bytes --]

Re: [PATCH 2/3] HID: Implement Wacom quirk in the kernel

[Jiri Kosina]

On Fri, 29 Jan 2010, Ping Cheng wrote:

>       +       rep_data[0] = 0x03; rep_data[1] = 0x00;
>       +       limit =3;
>       +       do {
>       +               ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
>       +                               HID_FEATURE_REPORT);
>       +       } while (ret < 0 && limit-- > 0);
> 
>  
> hdev->hid_output_raw_report error is not a hard failure, i.e., the following four lines are unnecessay. We can continue with the
> rest of the code.
>  
>       +       if (ret < 0) {
>       +               dev_err(&hdev->dev, "failed to poke device #1, %d\n", ret);
>       +               goto err_free;
>       +       }
>       +
>       +       /* 0x06 - high reporting speed, 0x05 - low speed */
>       +       rep_data[0] = 0x06; rep_data[1] = 0x00;
>       +       limit = 3;
>       +       do {
>       +               ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
>       +                               HID_FEATURE_REPORT);
>       +       } while (ret < 0 && limit-- > 0);
> 
>  
> Same comments apply here. "/* Note that if query fails it is not a hard failure */" is the comments we use in the corresponding
> Wacom USB driver, wacom_sys.c

Thanks for the feedback. I have queued the patch below on top of all the 
other changes.


From: Jiri Kosina <jkosina@suse.cz>
Subject: [PATCH] HID: make Wacom modesetting failures non-fatal

With Wacom tablet mode-setting moved from userspace into kernel,
we don't have to consider failures of device queries through the
_raw callback as hard failure, as the driver can safely continue
anyway.

This is consistent with the current USB driver in wacom_sys.c

Reported-by: Ping Cheng <pinglinux@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-wacom.c |   17 +++++++++--------
 1 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index b8778db..8d3b46f 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -181,6 +181,11 @@ static int wacom_probe(struct hid_device *hdev,
 		goto err_free;
 	}
 
+	/*
+	 * Note that if the raw queries fail, it's not a hard failure and it
+	 * is safe to continue
+	 */
+
 	/* Set Wacom mode2 */
 	rep_data[0] = 0x03; rep_data[1] = 0x00;
 	limit = 3;
@@ -188,10 +193,8 @@ static int wacom_probe(struct hid_device *hdev,
 		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
 				HID_FEATURE_REPORT);
 	} while (ret < 0 && limit-- > 0);
-	if (ret < 0) {
-		dev_err(&hdev->dev, "failed to poke device #1, %d\n", ret);
-		goto err_free;
-	}
+	if (ret < 0)
+		dev_warn(&hdev->dev, "failed to poke device #1, %d\n", ret);
 
 	/* 0x06 - high reporting speed, 0x05 - low speed */
 	rep_data[0] = 0x06; rep_data[1] = 0x00;
@@ -200,10 +203,8 @@ static int wacom_probe(struct hid_device *hdev,
 		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
 				HID_FEATURE_REPORT);
 	} while (ret < 0 && limit-- > 0);
-	if (ret < 0) {
-		dev_err(&hdev->dev, "failed to poke device #2, %d\n", ret);
-		goto err_free;
-	}
+	if (ret < 0)
+		dev_warn(&hdev->dev, "failed to poke device #2, %d\n", ret);
 
 	hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
 	input = hidinput->input;
-- 
1.6.4.2

[PATCH 3/3] HID: Enable Sixaxis controller over Bluetooth

[Jiri Kosina]

From: Bastien Nocera <hadess@hadess.net>

Now that hid_output_raw_report works, port the PS3 Sixaxis Bluetooth quirk 
from user-space, into kernel-space.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-core.c |    1 +
 drivers/hid/hid-sony.c |   15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index eabe5f8..f7f80e1 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1340,6 +1340,7 @@ static const struct hid_device_id hid_blacklist[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 4e84502..08b7fa0 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -73,6 +73,12 @@ static int sony_set_operational(struct hid_device *hdev)
 	return ret;
 }
 
+static int sony_set_operational_bt(struct hid_device *hdev)
+{
+	unsigned char buf[] = { 0x53, 0xf4,  0x42, 0x03, 0x00, 0x00 };
+	return hdev->hid_output_raw_report(hdev, buf, sizeof(buf), HID_FEATURE_REPORT);
+}
+
 static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	int ret;
@@ -101,7 +107,13 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		goto err_free;
 	}
 
-	ret = sony_set_operational(hdev);
+	if (hdev->bus == BUS_USB)
+		ret = sony_set_operational(hdev);
+	else if (hdev->bus == BUS_BLUETOOTH)
+		ret = sony_set_operational_bt(hdev);
+	else
+		ret = 0;
+
 	if (ret < 0)
 		goto err_stop;
 
@@ -121,6 +133,7 @@ static void sony_remove(struct hid_device *hdev)
 
 static const struct hid_device_id sony_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE),
 		.driver_data = VAIO_RDESC_CONSTANT },
 	{ }
-- 
1.6.4.2

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Bastien Nocera]

On Fri, 2010-01-29 at 15:20 +0100, Jiri Kosina wrote:
> Hi,
> 
> this is a followup to the thread
> 
> 	"Implement Bluetooth Wacom tablet's mode change in the kernel"
> 
> First patch alters the raw output API so that it is able to actually 
> distinguish between feature and output reports (and modifies low-level 
> drivers accordingly), and the two followup patches make use of this for 
> in-kernel mode setting of Sony and Wacom bluetooth devices.
> 
> Marcel, could you please review the Bluetooth part?

Patches 1 and 2 work as expected (minus the hidp parsing issue[1]).
Couldn't test patch 3 for the Sony Sixaxis right now.

Cheers

[1]: Comments on the patch at
http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
appreciated

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Michael Poole]

Bastien Nocera writes:

> On Fri, 2010-01-29 at 15:20 +0100, Jiri Kosina wrote:
>> Hi,
>> 
>> this is a followup to the thread
>> 
>> 	"Implement Bluetooth Wacom tablet's mode change in the kernel"
>> 
>> First patch alters the raw output API so that it is able to actually 
>> distinguish between feature and output reports (and modifies low-level 
>> drivers accordingly), and the two followup patches make use of this for 
>> in-kernel mode setting of Sony and Wacom bluetooth devices.
>> 
>> Marcel, could you please review the Bluetooth part?

Count this as another vote for review, please -- I have a similar
patch[1] that I would prefer to drop.

[1]- http://www.spinics.net/lists/linux-input/msg06768.html

> Patches 1 and 2 work as expected (minus the hidp parsing issue[1]).
> Couldn't test patch 3 for the Sony Sixaxis right now.
>
> Cheers
>
> [1]: Comments on the patch at
> http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
> appreciated

This patch does not work for me.  Before, the first time after each boot
that I tried to connect to an Apple Magic Mouse, it failed with -14
(EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
-EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not looked
yet to see where the -EINVAL is coming from -- would that help?  (Both
with and without your patch, the second attempt to connect works.)

Michael Poole

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Michael Poole]

Bastien Nocera writes:

> On Fri, 2010-01-29 at 15:20 +0100, Jiri Kosina wrote:
>> Hi,
>> 
>> this is a followup to the thread
>> 
>> 	"Implement Bluetooth Wacom tablet's mode change in the kernel"
>> 
>> First patch alters the raw output API so that it is able to actually 
>> distinguish between feature and output reports (and modifies low-level 
>> drivers accordingly), and the two followup patches make use of this for 
>> in-kernel mode setting of Sony and Wacom bluetooth devices.
>> 
>> Marcel, could you please review the Bluetooth part?

Count this as another vote for review, please -- I have a similar
patch[1] that I would prefer to drop.

[1]- http://www.spinics.net/lists/linux-input/msg06768.html

> Patches 1 and 2 work as expected (minus the hidp parsing issue[1]).
> Couldn't test patch 3 for the Sony Sixaxis right now.
>
> Cheers
>
> [1]: Comments on the patch at
> http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
> appreciated

This patch does not work for me.  Before, the first time after each boot
that I tried to connect to an Apple Magic Mouse, it failed with -14
(EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
-EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not looked
yet to see where the -EINVAL is coming from -- would that help?  (Both
with and without your patch, the second attempt to connect works.)

Michael Poole

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Bastien Nocera]

On Fri, 2010-01-29 at 19:46 -0500, Michael Poole wrote:
> > [1]: Comments on the patch at
> > http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
> > appreciated
> 
> This patch does not work for me.  Before, the first time after each
> boot
> that I tried to connect to an Apple Magic Mouse, it failed with -14
> (EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
> -EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not
> looked
> yet to see where the -EINVAL is coming from -- would that help?  (Both
> with and without your patch, the second attempt to connect works.) 

I don't get -EFAULT anymore (it was failing to copy the rd_data from
user-space), but I do get -EINVALs now. I haven't investigated it
though. My guess is that the hid parser fails.

Could you compare the sizes of the data gathered in user-space?

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Michael Poole]

Bastien Nocera writes:

> On Fri, 2010-01-29 at 19:46 -0500, Michael Poole wrote:
>> > [1]: Comments on the patch at
>> > http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
>> > appreciated
>> 
>> This patch does not work for me.  Before, the first time after each
>> boot
>> that I tried to connect to an Apple Magic Mouse, it failed with -14
>> (EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
>> -EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not
>> looked
>> yet to see where the -EINVAL is coming from -- would that help?  (Both
>> with and without your patch, the second attempt to connect works.) 
>
> I don't get -EFAULT anymore (it was failing to copy the rd_data from
> user-space), but I do get -EINVALs now. I haven't investigated it
> though. My guess is that the hid parser fails.
>
> Could you compare the sizes of the data gathered in user-space?

It looks like something else is overwriting parts of the hidp_session
structure; I hope to find out what that is tomorrow.  Based on a
printk() in hidp_sock_ioctl(), user space consistently passes a 99-byte
HID report descriptor.  I added another printk() to hidp_parse() to
characterize things:
  printk("hidp_parse(%p): %u@%p\n", hid, req->rd_size, req->rd_data);

With your patch, the first time I connect to the mouse:
[  244.109619] hidp_parse(ffff880138f90000): 0@0000002800000000
[  244.109694] magicmouse 0005:05AC:030D.0001: magicmouse hid parse
  failed
[  244.109708] magicmouse: probe of 0005:05AC:030D.0001 failed with
  error -22

With your patch, the second time:
[  258.840542] hidp_parse(ffff880134e14000): 99@ffff88008fd8f880
[  258.841415] input: Apple Wireless Mouse as
  /devices/pci0000:00/0000:00:1d.2/usb8/8-1/8-1:1.0/bluetooth/hci0/hci0:12/input11

Without your patch, the first time:
[  157.569000] hidp_parse(ffff8801313cc000): 11859@ffffffff811397c0
[  157.569018] magicmouse 0005:05AC:030D.0001: magicmouse hid parse
  failed
[  157.569031] magicmouse: probe of 0005:05AC:030D.0001 failed with
  error -14

Without your patch, the second time:
[  178.983956] hidp_parse(ffff88012e660000): 99@00007f40d7d44880
[  178.984977] input: Apple Wireless Mouse as
  /devices/pci0000:00/0000:00:1d.2/usb8/8-1/8-1:1.0/bluetooth/hci0/hci0:12/input11

Michael Poole

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Michael Poole]

Bastien Nocera writes:

> On Fri, 2010-01-29 at 19:46 -0500, Michael Poole wrote:
>> > [1]: Comments on the patch at
>> > http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
>> > appreciated
>> 
>> This patch does not work for me.  Before, the first time after each
>> boot
>> that I tried to connect to an Apple Magic Mouse, it failed with -14
>> (EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
>> -EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not
>> looked
>> yet to see where the -EINVAL is coming from -- would that help?  (Both
>> with and without your patch, the second attempt to connect works.) 
>
> I don't get -EFAULT anymore (it was failing to copy the rd_data from
> user-space), but I do get -EINVALs now. I haven't investigated it
> though. My guess is that the hid parser fails.
>
> Could you compare the sizes of the data gathered in user-space?

It looks like something else is overwriting parts of the hidp_session
structure; I hope to find out what that is tomorrow.  Based on a
printk() in hidp_sock_ioctl(), user space consistently passes a 99-byte
HID report descriptor.  I added another printk() to hidp_parse() to
characterize things:
  printk("hidp_parse(%p): %u@%p\n", hid, req->rd_size, req->rd_data);

With your patch, the first time I connect to the mouse:
[  244.109619] hidp_parse(ffff880138f90000): 0@0000002800000000
[  244.109694] magicmouse 0005:05AC:030D.0001: magicmouse hid parse
  failed
[  244.109708] magicmouse: probe of 0005:05AC:030D.0001 failed with
  error -22

With your patch, the second time:
[  258.840542] hidp_parse(ffff880134e14000): 99@ffff88008fd8f880
[  258.841415] input: Apple Wireless Mouse as
  /devices/pci0000:00/0000:00:1d.2/usb8/8-1/8-1:1.0/bluetooth/hci0/hci0:12/input11

Without your patch, the first time:
[  157.569000] hidp_parse(ffff8801313cc000): 11859@ffffffff811397c0
[  157.569018] magicmouse 0005:05AC:030D.0001: magicmouse hid parse
  failed
[  157.569031] magicmouse: probe of 0005:05AC:030D.0001 failed with
  error -14

Without your patch, the second time:
[  178.983956] hidp_parse(ffff88012e660000): 99@00007f40d7d44880
[  178.984977] input: Apple Wireless Mouse as
  /devices/pci0000:00/0000:00:1d.2/usb8/8-1/8-1:1.0/bluetooth/hci0/hci0:12/input11

Michael Poole

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Michael Poole]

Bastien Nocera writes:

> On Fri, 2010-01-29 at 19:46 -0500, Michael Poole wrote:
>> > [1]: Comments on the patch at
>> > http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
>> > appreciated
>> 
>> This patch does not work for me.  Before, the first time after each
>> boot
>> that I tried to connect to an Apple Magic Mouse, it failed with -14
>> (EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
>> -EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not
>> looked
>> yet to see where the -EINVAL is coming from -- would that help?  (Both
>> with and without your patch, the second attempt to connect works.) 
>
> I don't get -EFAULT anymore (it was failing to copy the rd_data from
> user-space), but I do get -EINVALs now. I haven't investigated it
> though. My guess is that the hid parser fails.
>
> Could you compare the sizes of the data gathered in user-space?

The bug mysteriously disappeared when I tried to apply kgdb to the
problem.  Your patch won't do the trick because the hidp_connadd_req
structure has also gone out of scope by the time the hid-(whatever)
probe function is called.  The ioctl has returned to the user, but the
new hid-(whatever) module is not yet loaded.

That is, the sequence looks like this:

  - Application triggers hidp_sock_ioctl(socket, HIDPCONNADD, &connadd).
    - This starts the connection, and returns 0...
    - ... but also indicates that some other module needs to be loaded.

  - User-space loads the appropriate module does init_module()...
    - which calls the module_init() function...
    - which calls hid_register_driver()...
    - which eventually attaches the new driver to the device...
    - triggering the module's probe() function to call hid_parse()...
    - hid_parse() fails because its hidp_connadd_req is gone.

Marcel, I think this is a case where the subsystem maintainer should
make the call on how to fix it.  I can write and locally test a patch,
but I don't want to assume that (for example) the desired solution is to
keep a copy of the Report descriptor in the hidp_session.  The USB HID
core sends a GET_DESCRIPTOR request for the Report descriptor, which
isn't practical here because that descriptor is only available through
SDP.

Michael Poole

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Michael Poole]

Bastien Nocera writes:

> On Fri, 2010-01-29 at 19:46 -0500, Michael Poole wrote:
>> > [1]: Comments on the patch at
>> > http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
>> > appreciated
>> 
>> This patch does not work for me.  Before, the first time after each
>> boot
>> that I tried to connect to an Apple Magic Mouse, it failed with -14
>> (EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
>> -EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not
>> looked
>> yet to see where the -EINVAL is coming from -- would that help?  (Both
>> with and without your patch, the second attempt to connect works.) 
>
> I don't get -EFAULT anymore (it was failing to copy the rd_data from
> user-space), but I do get -EINVALs now. I haven't investigated it
> though. My guess is that the hid parser fails.
>
> Could you compare the sizes of the data gathered in user-space?

The bug mysteriously disappeared when I tried to apply kgdb to the
problem.  Your patch won't do the trick because the hidp_connadd_req
structure has also gone out of scope by the time the hid-(whatever)
probe function is called.  The ioctl has returned to the user, but the
new hid-(whatever) module is not yet loaded.

That is, the sequence looks like this:

  - Application triggers hidp_sock_ioctl(socket, HIDPCONNADD, &connadd).
    - This starts the connection, and returns 0...
    - ... but also indicates that some other module needs to be loaded.

  - User-space loads the appropriate module does init_module()...
    - which calls the module_init() function...
    - which calls hid_register_driver()...
    - which eventually attaches the new driver to the device...
    - triggering the module's probe() function to call hid_parse()...
    - hid_parse() fails because its hidp_connadd_req is gone.

Marcel, I think this is a case where the subsystem maintainer should
make the call on how to fix it.  I can write and locally test a patch,
but I don't want to assume that (for example) the desired solution is to
keep a copy of the Report descriptor in the hidp_session.  The USB HID
core sends a GET_DESCRIPTOR request for the Report descriptor, which
isn't practical here because that descriptor is only available through
SDP.

Michael Poole

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Bastien Nocera]

On Tue, 2010-02-02 at 20:25 -0500, Michael Poole wrote:
> Bastien Nocera writes:
> 
> > On Fri, 2010-01-29 at 19:46 -0500, Michael Poole wrote:
> >> > [1]: Comments on the patch at
> >> > http://thread.gmane.org/gmane.linux.bluez.kernel/4279 would be
> >> > appreciated
> >> 
> >> This patch does not work for me.  Before, the first time after each
> >> boot
> >> that I tried to connect to an Apple Magic Mouse, it failed with -14
> >> (EFAULT).  With this patch, it fails with -22 (EINVAL) instead.  The
> >> -EFAULT *was* due to hidp_parse()'s copy_from_user().  I have not
> >> looked
> >> yet to see where the -EINVAL is coming from -- would that help?  (Both
> >> with and without your patch, the second attempt to connect works.) 
> >
> > I don't get -EFAULT anymore (it was failing to copy the rd_data from
> > user-space), but I do get -EINVALs now. I haven't investigated it
> > though. My guess is that the hid parser fails.
> >
> > Could you compare the sizes of the data gathered in user-space?
> 
> The bug mysteriously disappeared when I tried to apply kgdb to the
> problem.  Your patch won't do the trick because the hidp_connadd_req
> structure has also gone out of scope by the time the hid-(whatever)
> probe function is called.  The ioctl has returned to the user, but the
> new hid-(whatever) module is not yet loaded.

Right. I knew that rd_data would already be out of scope, didn't think
about the hidp_connadd_req structure itself.

I guess we should make a copy of the rd_data/rd_size in hidp_setup_hid()
instead.

> That is, the sequence looks like this:
> 
>   - Application triggers hidp_sock_ioctl(socket, HIDPCONNADD, &connadd).
>     - This starts the connection, and returns 0...
>     - ... but also indicates that some other module needs to be loaded.
> 
>   - User-space loads the appropriate module does init_module()...
>     - which calls the module_init() function...
>     - which calls hid_register_driver()...
>     - which eventually attaches the new driver to the device...
>     - triggering the module's probe() function to call hid_parse()...
>     - hid_parse() fails because its hidp_connadd_req is gone.
> 
> Marcel, I think this is a case where the subsystem maintainer should
> make the call on how to fix it.  I can write and locally test a patch,
> but I don't want to assume that (for example) the desired solution is to
> keep a copy of the Report descriptor in the hidp_session.

I would think it would be the cleanest way to do it. Quite a few members
of the hidp_connadd_req structure are already copied into the session in
hidp_setup_hid().

>   The USB HID
> core sends a GET_DESCRIPTOR request for the Report descriptor, which
> isn't practical here because that descriptor is only available through
> SDP.

And we only do SDP queries in user-space...

If you're not going to work on it shortly, I can take a look at cooking
a patch by the end of the week. Otherwise, I'd be happy testing your
patches.

Cheers

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Jiri Kosina]

On Wed, 3 Feb 2010, Jiri Kosina wrote:

> > > The USB HID core sends a GET_DESCRIPTOR request for the Report 
> > > descriptor, which isn't practical here because that descriptor is only 
> > > available through SDP.
> > 
> > And we only do SDP queries in user-space...
> > 
> > If you're not going to work on it shortly, I can take a look at cooking
> > a patch by the end of the week. Otherwise, I'd be happy testing your
> > patches.

I have now rebased the three patches on top of 6bf8268f9a91f1 
("Bluetooth: Use the control channel for raw HID reports") which has 
already landed in Linus' tree. I will send them as a followup to this 
mail.

If you have any changes/acks/nacks, please let me know.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH 1/3] HID: make raw reports possible for both feature and output reports

[Jiri Kosina]

In commit 2da31939a42 ("Bluetooth: Implement raw output support for HIDP
layer"), support for Bluetooth hid_output_raw_report was added, but it
pushes the data to the intr socket instead of the ctrl one. This has been
fixed by 6bf8268f9a91f1 ("Bluetooth: Use the control channel for raw HID reports")

Still, it is necessary to distinguish whether the report in question should be
either FEATURE or OUTPUT. For this, we have to extend the generic HID API,
so that hid_output_raw_report() callback provides means to specify this
value so that it can be passed down to lower level hardware drivers (currently
Bluetooth and USB).

Based on original patch by Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hidraw.c          |    2 +-
 drivers/hid/usbhid/hid-core.c |    5 +++--
 include/linux/hid.h           |    2 +-
 net/bluetooth/hidp/core.c     |   13 ++++++++++---
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index cdd1369..d044767 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -134,7 +134,7 @@ static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t
 		goto out;
 	}
 
-	ret = dev->hid_output_raw_report(dev, buf, count);
+	ret = dev->hid_output_raw_report(dev, buf, count, HID_OUTPUT_REPORT);
 out:
 	kfree(buf);
 	return ret;
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index e2997a8..caa16c0 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -774,7 +774,8 @@ static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
 	return 0;
 }
 
-static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
+static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count,
+		unsigned char report_type)
 {
 	struct usbhid_device *usbhid = hid->driver_data;
 	struct usb_device *dev = hid_to_usb_dev(hid);
@@ -785,7 +786,7 @@ static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t co
 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 		HID_REQ_SET_REPORT,
 		USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-		((HID_OUTPUT_REPORT + 1) << 8) | *buf,
+		((report_type + 1) << 8) | *buf,
 		interface->desc.bInterfaceNumber, buf + 1, count - 1,
 		USB_CTRL_SET_TIMEOUT);
 
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 8709365..3661a62 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -501,7 +501,7 @@ struct hid_device {							/* device report descriptor */
 	void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 
 	/* handler for raw output data, used by hidraw */
-	int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t);
+	int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 
 	/* debugging support via debugfs */
 	unsigned short debug;
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 6cf526d..9c88750 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -313,10 +313,17 @@ static int hidp_send_report(struct hidp_session *session, struct hid_report *rep
 	return hidp_queue_report(session, buf, rsize);
 }
 
-static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count)
+static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
+		unsigned char report_type)
 {
-	if (hidp_send_ctrl_message(hid->driver_data,
-			HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE,
+	if (report_type == HID_FEATURE_REPORT)
+		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
+	else if (report_type == HID_OUTPUT_REPORT)
+		report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
+	else
+		return -EINVAL;
+
+	if (hidp_send_ctrl_message(hid->driver_data, report_type,
 			data, count))
 		return -ENOMEM;
 	return count;
-- 
1.6.4.2

Re: [PATCH 1/3] HID: make raw reports possible for both feature and output reports

[Marcel Holtmann]

Hi Jiri,

> In commit 2da31939a42 ("Bluetooth: Implement raw output support for HIDP
> layer"), support for Bluetooth hid_output_raw_report was added, but it
> pushes the data to the intr socket instead of the ctrl one. This has been
> fixed by 6bf8268f9a91f1 ("Bluetooth: Use the control channel for raw HID reports")
> 
> Still, it is necessary to distinguish whether the report in question should be
> either FEATURE or OUTPUT. For this, we have to extend the generic HID API,
> so that hid_output_raw_report() callback provides means to specify this
> value so that it can be passed down to lower level hardware drivers (currently
> Bluetooth and USB).
> 
> Based on original patch by Bastien Nocera <hadess@hadess.net>
> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> ---
>  drivers/hid/hidraw.c          |    2 +-
>  drivers/hid/usbhid/hid-core.c |    5 +++--
>  include/linux/hid.h           |    2 +-
>  net/bluetooth/hidp/core.c     |   13 ++++++++++---
>  4 files changed, 15 insertions(+), 7 deletions(-)

Acked-by: Marcel Holtmann <marcel@holtmann.org>
 
> -static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count)
> +static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
> +		unsigned char report_type)
>  {
> -	if (hidp_send_ctrl_message(hid->driver_data,
> -			HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE,
> +	if (report_type == HID_FEATURE_REPORT)
> +		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
> +	else if (report_type == HID_OUTPUT_REPORT)
> +		report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
> +	else
> +		return -EINVAL;

If you wanna be a little bit more readable, then using a switch
statement helps instead of else if. Just my 2 cents.

Regards

Marcel

Re: [PATCH 1/3] HID: make raw reports possible for both feature and output reports

[Jiri Kosina]

On Wed, 3 Feb 2010, Marcel Holtmann wrote:

> > In commit 2da31939a42 ("Bluetooth: Implement raw output support for HIDP
> > layer"), support for Bluetooth hid_output_raw_report was added, but it
> > pushes the data to the intr socket instead of the ctrl one. This has been
> > fixed by 6bf8268f9a91f1 ("Bluetooth: Use the control channel for raw HID reports")
> > 
> > Still, it is necessary to distinguish whether the report in question should be
> > either FEATURE or OUTPUT. For this, we have to extend the generic HID API,
> > so that hid_output_raw_report() callback provides means to specify this
> > value so that it can be passed down to lower level hardware drivers (currently
> > Bluetooth and USB).
> > 
> > Based on original patch by Bastien Nocera <hadess@hadess.net>
> > Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> > ---
> >  drivers/hid/hidraw.c          |    2 +-
> >  drivers/hid/usbhid/hid-core.c |    5 +++--
> >  include/linux/hid.h           |    2 +-
> >  net/bluetooth/hidp/core.c     |   13 ++++++++++---
> >  4 files changed, 15 insertions(+), 7 deletions(-)
> 
> Acked-by: Marcel Holtmann <marcel@holtmann.org>
>  
> > -static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count)
> > +static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
> > +		unsigned char report_type)
> >  {
> > -	if (hidp_send_ctrl_message(hid->driver_data,
> > -			HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE,
> > +	if (report_type == HID_FEATURE_REPORT)
> > +		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
> > +	else if (report_type == HID_OUTPUT_REPORT)
> > +		report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
> > +	else
> > +		return -EINVAL;
> 
> If you wanna be a little bit more readable, then using a switch
> statement helps instead of else if. Just my 2 cents.

I have converted this to switch, added your Acked-by and queued in my 
tree.

Thanks Marcel.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH 2/3] HID: Implement Wacom quirk in the kernel

[Jiri Kosina]

From: Bastien Nocera <hadess@hadess.net>

The hid-wacom driver required user-space to poke at the tablet
to make it send data about the cursor location.

This patch makes it do the same thing but in the kernel.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-wacom.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 12dcda5..d7897b5 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -156,7 +156,9 @@ static int wacom_probe(struct hid_device *hdev,
 	struct hid_input *hidinput;
 	struct input_dev *input;
 	struct wacom_data *wdata;
+	char rep_data[2];
 	int ret;
+	int limit;
 
 	wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
 	if (wdata == NULL) {
@@ -166,6 +168,7 @@ static int wacom_probe(struct hid_device *hdev,
 
 	hid_set_drvdata(hdev, wdata);
 
+	/* Parse the HID report now */
 	ret = hid_parse(hdev);
 	if (ret) {
 		dev_err(&hdev->dev, "parse failed\n");
@@ -178,6 +181,30 @@ static int wacom_probe(struct hid_device *hdev,
 		goto err_free;
 	}
 
+	/* Set Wacom mode2 */
+	rep_data[0] = 0x03; rep_data[1] = 0x00;
+	limit =3;
+	do {
+		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+				HID_FEATURE_REPORT);
+	} while (ret < 0 && limit-- > 0);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to poke device #1, %d\n", ret);
+		goto err_free;
+	}
+
+	/* 0x06 - high reporting speed, 0x05 - low speed */
+	rep_data[0] = 0x06; rep_data[1] = 0x00;
+	limit = 3;
+	do {
+		ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+				HID_FEATURE_REPORT);
+	} while (ret < 0 && limit-- > 0);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to poke device #2, %d\n", ret);
+		goto err_free;
+	}
+
 	hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
 	input = hidinput->input;
 
-- 
1.6.4.2

Re: [PATCH 2/3] HID: Implement Wacom quirk in the kernel

[Marcel Holtmann]

Hi Jiri,

> The hid-wacom driver required user-space to poke at the tablet
> to make it send data about the cursor location.
> 
> This patch makes it do the same thing but in the kernel.
> 
> Signed-off-by: Bastien Nocera <hadess@hadess.net>
> Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Acked-by: Marcel Holtmann <marcel@holtmann.org>

>  
> +	/* Set Wacom mode2 */
> +	rep_data[0] = 0x03; rep_data[1] = 0x00;
> +	limit =3;

Small nitpick here. The space after = is missing ;)

Regards

Marcel

Re: [PATCH 2/3] HID: Implement Wacom quirk in the kernel

[Jiri Kosina]

On Wed, 3 Feb 2010, Marcel Holtmann wrote:

> Hi Jiri,
> 
> > The hid-wacom driver required user-space to poke at the tablet
> > to make it send data about the cursor location.
> > 
> > This patch makes it do the same thing but in the kernel.
> > 
> > Signed-off-by: Bastien Nocera <hadess@hadess.net>
> > Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> 
> Acked-by: Marcel Holtmann <marcel@holtmann.org>
> 
> >  
> > +	/* Set Wacom mode2 */
> > +	rep_data[0] = 0x03; rep_data[1] = 0x00;
> > +	limit =3;
> 
> Small nitpick here. The space after = is missing ;)

Fixed and applied. Thank you.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH 3/3] HID: Enable Sixaxis controller over Bluetooth

[Jiri Kosina]

From: Bastien Nocera <hadess@hadess.net>

Now that hid_output_raw_report works, port the PS3 Sixaxis
Bluetooth quirk from user-space, into kernel-space.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-core.c |    1 +
 drivers/hid/hid-sony.c |   15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index eabe5f8..f7f80e1 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1340,6 +1340,7 @@ static const struct hid_device_id hid_blacklist[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 4e84502..08b7fa0 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -73,6 +73,12 @@ static int sony_set_operational(struct hid_device *hdev)
 	return ret;
 }
 
+static int sony_set_operational_bt(struct hid_device *hdev)
+{
+	unsigned char buf[] = { 0x53, 0xf4,  0x42, 0x03, 0x00, 0x00 };
+	return hdev->hid_output_raw_report(hdev, buf, sizeof(buf), HID_FEATURE_REPORT);
+}
+
 static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	int ret;
@@ -101,7 +107,13 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		goto err_free;
 	}
 
-	ret = sony_set_operational(hdev);
+	if (hdev->bus == BUS_USB)
+		ret = sony_set_operational(hdev);
+	else if (hdev->bus == BUS_BLUETOOTH)
+		ret = sony_set_operational_bt(hdev);
+	else
+		ret = 0;
+
 	if (ret < 0)
 		goto err_stop;
 
@@ -121,6 +133,7 @@ static void sony_remove(struct hid_device *hdev)
 
 static const struct hid_device_id sony_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE),
 		.driver_data = VAIO_RDESC_CONSTANT },
 	{ }
-- 
1.6.4.2

Re: [PATCH 3/3] HID: Enable Sixaxis controller over Bluetooth

[Marcel Holtmann]

Hi Jiri,

> Now that hid_output_raw_report works, port the PS3 Sixaxis
> Bluetooth quirk from user-space, into kernel-space.
> 
> Signed-off-by: Bastien Nocera <hadess@hadess.net>
> Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Acked-by: Marcel Holtmann <marcel@holtmann.org>
 
> -	ret = sony_set_operational(hdev);
> +	if (hdev->bus == BUS_USB)
> +		ret = sony_set_operational(hdev);
> +	else if (hdev->bus == BUS_BLUETOOTH)
> +		ret = sony_set_operational_bt(hdev);
> +	else
> +		ret = 0;
> +

I would do sony_set_operational_usb() and sony_set_operational_bt() and
also turn this into a switch statement for better readability.

Regards

Marcel

Re: [PATCH 3/3] HID: Enable Sixaxis controller over Bluetooth

[Jiri Kosina]

On Wed, 3 Feb 2010, Marcel Holtmann wrote:

> Hi Jiri,
> 
> > Now that hid_output_raw_report works, port the PS3 Sixaxis
> > Bluetooth quirk from user-space, into kernel-space.
> > 
> > Signed-off-by: Bastien Nocera <hadess@hadess.net>
> > Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> 
> Acked-by: Marcel Holtmann <marcel@holtmann.org>
>  
> > -	ret = sony_set_operational(hdev);
> > +	if (hdev->bus == BUS_USB)
> > +		ret = sony_set_operational(hdev);
> > +	else if (hdev->bus == BUS_BLUETOOTH)
> > +		ret = sony_set_operational_bt(hdev);
> > +	else
> > +		ret = 0;
> > +
> 
> I would do sony_set_operational_usb() and sony_set_operational_bt() and
> also turn this into a switch statement for better readability.

Fixed and applied. Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Michael Poole]

Bastien and Marcel,

This patch works for me.  Bastien, does it also fix it for you?

Michael Poole

>From f8aeb64ac2d42f5fae080c00a287fdbd8304ffa2 Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Wed, 3 Feb 2010 21:49:48 -0500
Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

The report descriptor is read by user space (via the Service
Discovery Protocol), so it is only available during the ioctl
to connect.  However, the probe function that needs the
descriptor might not be called until a specific module is
loaded.  Keep a copy of the descriptor so it is available for
later use.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
 net/bluetooth/hidp/core.c |   42 +++++++++++++++++++-----------------------
 net/bluetooth/hidp/hidp.h |    4 +++-
 2 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index dde4c60..af4a448 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -701,29 +701,9 @@ static void hidp_close(struct hid_device *hid)
 static int hidp_parse(struct hid_device *hid)
 {
 	struct hidp_session *session = hid->driver_data;
-	struct hidp_connadd_req *req = session->req;
-	unsigned char *buf;
-	int ret;
-
-	buf = kmalloc(req->rd_size, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	if (copy_from_user(buf, req->rd_data, req->rd_size)) {
-		kfree(buf);
-		return -EFAULT;
-	}
-
-	ret = hid_parse_report(session->hid, buf, req->rd_size);
-
-	kfree(buf);
-
-	if (ret)
-		return ret;
 
-	session->req = NULL;
-
-	return 0;
+	return hid_parse_report(session->hid, session->rd_data,
+			session->rd_size);
 }
 
 static int hidp_start(struct hid_device *hid)
@@ -798,7 +778,17 @@ static int hidp_setup_hid(struct hidp_session *session,
 		return PTR_ERR(hid);
 
 	session->hid = hid;
-	session->req = req;
+	session->rd_size = req->rd_size;
+	session->rd_data = kzalloc(session->rd_size, GFP_KERNEL);
+	if (!session->rd_data) {
+		err = -ENOMEM;
+		goto failed;
+	}
+	if (copy_from_user(session->rd_data, req->rd_data, session->rd_size)) {
+		err = -EFAULT;
+		goto failed;
+	}
+
 	hid->driver_data = session;
 
 	baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
@@ -829,6 +819,9 @@ failed:
 	hid_destroy_device(hid);
 	session->hid = NULL;
 
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
 	return err;
 }
 
@@ -923,6 +916,9 @@ unlink:
 		session->hid = NULL;
 	}
 
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
 purge:
 	skb_queue_purge(&session->ctrl_transmit);
 	skb_queue_purge(&session->intr_transmit);
diff --git a/net/bluetooth/hidp/hidp.h b/net/bluetooth/hidp/hidp.h
index faf3d74..a4e215d 100644
--- a/net/bluetooth/hidp/hidp.h
+++ b/net/bluetooth/hidp/hidp.h
@@ -154,7 +154,9 @@ struct hidp_session {
 	struct sk_buff_head ctrl_transmit;
 	struct sk_buff_head intr_transmit;
 
-	struct hidp_connadd_req *req;
+	/* Report descriptor */
+	__u8 *rd_data;
+	uint rd_size;
 };
 
 static inline void hidp_schedule(struct hidp_session *session)
-- 
1.6.5.6

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Marcel Holtmann]

Hi Michael,

> This patch works for me.  Bastien, does it also fix it for you?
> 
> Michael Poole
> 
> From f8aeb64ac2d42f5fae080c00a287fdbd8304ffa2 Mon Sep 17 00:00:00 2001
> From: Michael Poole <mdpoole@troilus.org>
> Date: Wed, 3 Feb 2010 21:49:48 -0500
> Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
> 
> The report descriptor is read by user space (via the Service
> Discovery Protocol), so it is only available during the ioctl
> to connect.  However, the probe function that needs the
> descriptor might not be called until a specific module is
> loaded.  Keep a copy of the descriptor so it is available for
> later use.

looks good to me. I just prefer that you do the allocation of the report
descriptor before the HID object:

@@ -770,12 +770,24 @@ static int hidp_setup_hid(struct hidp_session *session,
        bdaddr_t src, dst;
        int err;
 
+       session->rd_data = kzalloc(req->rd_size, GFP_KERNEL);
+       if (!session->rd_data)
+               return -ENOMEM;
+
+       if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) {
+               err = -EFAULT;
+               goto fault;
+       }
+
+       session->rd_size = req->rd_size;
+
        hid = hid_allocate_device();
-       if (IS_ERR(hid))
-               return PTR_ERR(hid);
+       if (IS_ERR(hid)) {
+               err = PTR_ERR(hid);
+               goto fault;
+       }
 
        session->hid = hid;
-       session->req = req;
        hid->driver_data = session;
 
        baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
@@ -806,6 +818,10 @@ failed:
        hid_destroy_device(hid);
        session->hid = NULL;
 
+fault:
+       kfree(session->rd_data);
+       session->rd_data = NULL;
+
        return err;

Regards

Marcel

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Michael Poole]

Marcel Holtmann writes:

> looks good to me. I just prefer that you do the allocation of the report
> descriptor before the HID object:

An updated patch is below.  Sorry for the delay -- inclement weather
here got in the way of testing this as quickly as I would have liked.

>From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Fri, 5 Feb 2010 12:21:38 -0500
Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

The report descriptor is read by user space (via the Service
Discovery Protocol), so it is only available during the ioctl
to connect.  However, the probe function that needs the
descriptor might not be called until a specific module is
loaded.  Keep a copy of the descriptor so it is available for
later use.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
 net/bluetooth/hidp/core.c |   49 ++++++++++++++++++++++-----------------------
 net/bluetooth/hidp/hidp.h |    4 ++-
 2 files changed, 27 insertions(+), 26 deletions(-)

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index dde4c60..2928e44 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -701,29 +701,9 @@ static void hidp_close(struct hid_device *hid)
 static int hidp_parse(struct hid_device *hid)
 {
 	struct hidp_session *session = hid->driver_data;
-	struct hidp_connadd_req *req = session->req;
-	unsigned char *buf;
-	int ret;
-
-	buf = kmalloc(req->rd_size, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	if (copy_from_user(buf, req->rd_data, req->rd_size)) {
-		kfree(buf);
-		return -EFAULT;
-	}
-
-	ret = hid_parse_report(session->hid, buf, req->rd_size);
-
-	kfree(buf);
-
-	if (ret)
-		return ret;
-
-	session->req = NULL;
 
-	return 0;
+	return hid_parse_report(session->hid, session->rd_data,
+			session->rd_size);
 }
 
 static int hidp_start(struct hid_device *hid)
@@ -793,12 +773,24 @@ static int hidp_setup_hid(struct hidp_session *session,
 	bdaddr_t src, dst;
 	int err;
 
+	session->rd_data = kzalloc(req->rd_size, GFP_KERNEL);
+	if (!session->rd_data)
+		return -ENOMEM;
+
+	if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) {
+		err = -EFAULT;
+		goto fault;
+	}
+	session->rd_size = req->rd_size;
+
 	hid = hid_allocate_device();
-	if (IS_ERR(hid))
-		return PTR_ERR(hid);
+	if (IS_ERR(hid)) {
+		err = PTR_ERR(hid);
+		goto fault;
+	}
 
 	session->hid = hid;
-	session->req = req;
+
 	hid->driver_data = session;
 
 	baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
@@ -829,6 +821,10 @@ failed:
 	hid_destroy_device(hid);
 	session->hid = NULL;
 
+fault:
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
 	return err;
 }
 
@@ -923,6 +919,9 @@ unlink:
 		session->hid = NULL;
 	}
 
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
 purge:
 	skb_queue_purge(&session->ctrl_transmit);
 	skb_queue_purge(&session->intr_transmit);
diff --git a/net/bluetooth/hidp/hidp.h b/net/bluetooth/hidp/hidp.h
index faf3d74..a4e215d 100644
--- a/net/bluetooth/hidp/hidp.h
+++ b/net/bluetooth/hidp/hidp.h
@@ -154,7 +154,9 @@ struct hidp_session {
 	struct sk_buff_head ctrl_transmit;
 	struct sk_buff_head intr_transmit;
 
-	struct hidp_connadd_req *req;
+	/* Report descriptor */
+	__u8 *rd_data;
+	uint rd_size;
 };
 
 static inline void hidp_schedule(struct hidp_session *session)
-- 
1.6.5.6

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Michael Poole]

Marcel Holtmann writes:

> looks good to me. I just prefer that you do the allocation of the report
> descriptor before the HID object:

An updated patch is below.  Sorry for the delay -- inclement weather
here got in the way of testing this as quickly as I would have liked.

>From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Fri, 5 Feb 2010 12:21:38 -0500
Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

The report descriptor is read by user space (via the Service
Discovery Protocol), so it is only available during the ioctl
to connect.  However, the probe function that needs the
descriptor might not be called until a specific module is
loaded.  Keep a copy of the descriptor so it is available for
later use.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
 net/bluetooth/hidp/core.c |   49 ++++++++++++++++++++++-----------------------
 net/bluetooth/hidp/hidp.h |    4 ++-
 2 files changed, 27 insertions(+), 26 deletions(-)

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index dde4c60..2928e44 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -701,29 +701,9 @@ static void hidp_close(struct hid_device *hid)
 static int hidp_parse(struct hid_device *hid)
 {
 	struct hidp_session *session = hid->driver_data;
-	struct hidp_connadd_req *req = session->req;
-	unsigned char *buf;
-	int ret;
-
-	buf = kmalloc(req->rd_size, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	if (copy_from_user(buf, req->rd_data, req->rd_size)) {
-		kfree(buf);
-		return -EFAULT;
-	}
-
-	ret = hid_parse_report(session->hid, buf, req->rd_size);
-
-	kfree(buf);
-
-	if (ret)
-		return ret;
-
-	session->req = NULL;
 
-	return 0;
+	return hid_parse_report(session->hid, session->rd_data,
+			session->rd_size);
 }
 
 static int hidp_start(struct hid_device *hid)
@@ -793,12 +773,24 @@ static int hidp_setup_hid(struct hidp_session *session,
 	bdaddr_t src, dst;
 	int err;
 
+	session->rd_data = kzalloc(req->rd_size, GFP_KERNEL);
+	if (!session->rd_data)
+		return -ENOMEM;
+
+	if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) {
+		err = -EFAULT;
+		goto fault;
+	}
+	session->rd_size = req->rd_size;
+
 	hid = hid_allocate_device();
-	if (IS_ERR(hid))
-		return PTR_ERR(hid);
+	if (IS_ERR(hid)) {
+		err = PTR_ERR(hid);
+		goto fault;
+	}
 
 	session->hid = hid;
-	session->req = req;
+
 	hid->driver_data = session;
 
 	baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
@@ -829,6 +821,10 @@ failed:
 	hid_destroy_device(hid);
 	session->hid = NULL;
 
+fault:
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
 	return err;
 }
 
@@ -923,6 +919,9 @@ unlink:
 		session->hid = NULL;
 	}
 
+	kfree(session->rd_data);
+	session->rd_data = NULL;
+
 purge:
 	skb_queue_purge(&session->ctrl_transmit);
 	skb_queue_purge(&session->intr_transmit);
diff --git a/net/bluetooth/hidp/hidp.h b/net/bluetooth/hidp/hidp.h
index faf3d74..a4e215d 100644
--- a/net/bluetooth/hidp/hidp.h
+++ b/net/bluetooth/hidp/hidp.h
@@ -154,7 +154,9 @@ struct hidp_session {
 	struct sk_buff_head ctrl_transmit;
 	struct sk_buff_head intr_transmit;
 
-	struct hidp_connadd_req *req;
+	/* Report descriptor */
+	__u8 *rd_data;
+	uint rd_size;
 };
 
 static inline void hidp_schedule(struct hidp_session *session)
-- 
1.6.5.6

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Marcel Holtmann]

Hi Michael,

> > looks good to me. I just prefer that you do the allocation of the report
> > descriptor before the HID object:
> 
> An updated patch is below.  Sorry for the delay -- inclement weather
> here got in the way of testing this as quickly as I would have liked.
> 
> From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
> From: Michael Poole <mdpoole@troilus.org>
> Date: Fri, 5 Feb 2010 12:21:38 -0500
> Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
> 
> The report descriptor is read by user space (via the Service
> Discovery Protocol), so it is only available during the ioctl
> to connect.  However, the probe function that needs the
> descriptor might not be called until a specific module is
> loaded.  Keep a copy of the descriptor so it is available for
> later use.

patch has been applied. Thanks.

Regards

Marcel

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Ed Tomlinson]

Hi,

I have been trying to test Michael's magic mouse drivers against 32.7 (or .8-rc).   Is there a tree
based on .32 with these patches?  If not would it be possible to post the patches to lkml?  I do not
mind sorting out a few conflicts - this thread assume one knows a little more about the process being 
used here than is obvious.

TIA
Ed Tomlinson

On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
> Hi Michael,
> 
> > > looks good to me. I just prefer that you do the allocation of the report
> > > descriptor before the HID object:
> > 
> > An updated patch is below.  Sorry for the delay -- inclement weather
> > here got in the way of testing this as quickly as I would have liked.
> > 
> > From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
> > From: Michael Poole <mdpoole@troilus.org>
> > Date: Fri, 5 Feb 2010 12:21:38 -0500
> > Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
> > 
> > The report descriptor is read by user space (via the Service
> > Discovery Protocol), so it is only available during the ioctl
> > to connect.  However, the probe function that needs the
> > descriptor might not be called until a specific module is
> > loaded.  Keep a copy of the descriptor so it is available for
> > later use.
> 
> patch has been applied. Thanks.
> 
> Regards
> 
> Marcel
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
> 
> 

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Justin Mattock]

> TIA
> Ed Tomlinson
>
> On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
>> Hi Michael,
>>
>> > > looks good to me. I just prefer that you do the allocation of the report
>> > > descriptor before the HID object:
>> >
>> > An updated patch is below.  Sorry for the delay -- inclement weather
>> > here got in the way of testing this as quickly as I would have liked.
>> >
>> > From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
>> > From: Michael Poole <mdpoole@troilus.org>
>> > Date: Fri, 5 Feb 2010 12:21:38 -0500
>> > Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
>> >
>> > The report descriptor is read by user space (via the Service
>> > Discovery Protocol), so it is only available during the ioctl
>> > to connect.  However, the probe function that needs the
>> > descriptor might not be called until a specific module is
>> > loaded.  Keep a copy of the descriptor so it is available for
>> > later use.
>>
>> patch has been applied. Thanks.
>>
>> Regards
>>
>> Marcel
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at  http://www.tux.org/lkml/


> Hi,
>
> I have been trying to test Michael's magic mouse drivers against 32.7 (or .8-rc).   Is there a tree
> based on .32 with these patches?  If not would it be possible to post the patches to lkml?  I do not
> mind sorting out a few conflicts - this thread assume one knows a little more about the process being
> used here than is obvious.
>


just got one of those magic things as well.
I did apply the patchs to the current HEAD, but
am getting a lifeless result i.g. here's what I did:

sudo /usr/bin/hcitool scan
sudo /usr/bin/simple-agent hci0 D4:9A:20:88:C7:48
sudo /usr/bin/dbus-send --system --dest=org.bluez --print-reply
/org/bluez/1897/hci0/dev_D4_9A_20_88_C7_48 org.bluez.Input.Connect
sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48

the thing works after that(no scroll), fast cursor though.
then reboot
once up and running nothing.
cat /var/log/daemon.log (shows this)

Feb  8 22:57:40 Linux-1 bluetoothd[1973]: link_key_request
(sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
Feb  8 22:58:21 Linux-1 bluetoothd[1973]: last message repeated 5 times
Feb  8 22:59:21 Linux-1 bluetoothd[1973]: last message repeated 3 times
Feb  8 23:03:10 Linux-1 bluetoothd[1973]: link_key_request
(sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)

(could be missing something though(don't use gnome/kde-bluetooth)although
mightymouse works).

bluez is v59(in the morning I can load up the latest and see).
and then go from there if you need me to be a test subject let me know.


BTW: ed I can attach the patch(seperate e-mail) which is updated to
rc6*(to the most part)
 if you want.? this way you can give it a try, then once these are in
the mainline
you wont have todo so.

-- 
Justin P. Mattock

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Justin Mattock]

> TIA
> Ed Tomlinson
>
> On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
>> Hi Michael,
>>
>> > > looks good to me. I just prefer that you do the allocation of the re=
port
>> > > descriptor before the HID object:
>> >
>> > An updated patch is below. =A0Sorry for the delay -- inclement weather
>> > here got in the way of testing this as quickly as I would have liked.
>> >
>> > From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
>> > From: Michael Poole <mdpoole@troilus.org>
>> > Date: Fri, 5 Feb 2010 12:21:38 -0500
>> > Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report de=
scriptor.
>> >
>> > The report descriptor is read by user space (via the Service
>> > Discovery Protocol), so it is only available during the ioctl
>> > to connect. =A0However, the probe function that needs the
>> > descriptor might not be called until a specific module is
>> > loaded. =A0Keep a copy of the descriptor so it is available for
>> > later use.
>>
>> patch has been applied. Thanks.
>>
>> Regards
>>
>> Marcel
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" =
in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at =A0http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at =A0http://www.tux.org/lkml/


> Hi,
>
> I have been trying to test Michael's magic mouse drivers against 32.7 (or=
 .8-rc).   Is there a tree
> based on .32 with these patches?  If not would it be possible to post the=
 patches to lkml?  I do not
> mind sorting out a few conflicts - this thread assume one knows a little =
more about the process being
> used here than is obvious.
>


just got one of those magic things as well.
I did apply the patchs to the current HEAD, but
am getting a lifeless result i.g. here's what I did:

sudo /usr/bin/hcitool scan
sudo /usr/bin/simple-agent hci0 D4:9A:20:88:C7:48
sudo /usr/bin/dbus-send --system --dest=3Dorg.bluez --print-reply
/org/bluez/1897/hci0/dev_D4_9A_20_88_C7_48 org.bluez.Input.Connect
sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48

the thing works after that(no scroll), fast cursor though.
then reboot
once up and running nothing.
cat /var/log/daemon.log (shows this)

Feb  8 22:57:40 Linux-1 bluetoothd[1973]: link_key_request
(sba=3D00:25:00:C0:6C:4F, dba=3DD4:9A:20:88:C7:48)
Feb  8 22:58:21 Linux-1 bluetoothd[1973]: last message repeated 5 times
Feb  8 22:59:21 Linux-1 bluetoothd[1973]: last message repeated 3 times
Feb  8 23:03:10 Linux-1 bluetoothd[1973]: link_key_request
(sba=3D00:25:00:C0:6C:4F, dba=3DD4:9A:20:88:C7:48)

(could be missing something though(don't use gnome/kde-bluetooth)although
mightymouse works).

bluez is v59(in the morning I can load up the latest and see).
and then go from there if you need me to be a test subject let me know.


BTW: ed I can attach the patch(seperate e-mail) which is updated to
rc6*(to the most part)
 if you want.? this way you can give it a try, then once these are in
the mainline
you wont have todo so.

--=20
Justin P. Mattock

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Bastien Nocera]

On Mon, 2010-02-08 at 23:22 -0800, Justin Mattock wrote:
> > TIA
> > Ed Tomlinson
> >
> > On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
> >> Hi Michael,
> >>
> >> > > looks good to me. I just prefer that you do the allocation of the report
> >> > > descriptor before the HID object:
> >> >
> >> > An updated patch is below.  Sorry for the delay -- inclement weather
> >> > here got in the way of testing this as quickly as I would have liked.
> >> >
> >> > From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
> >> > From: Michael Poole <mdpoole@troilus.org>
> >> > Date: Fri, 5 Feb 2010 12:21:38 -0500
> >> > Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
> >> >
> >> > The report descriptor is read by user space (via the Service
> >> > Discovery Protocol), so it is only available during the ioctl
> >> > to connect.  However, the probe function that needs the
> >> > descriptor might not be called until a specific module is
> >> > loaded.  Keep a copy of the descriptor so it is available for
> >> > later use.
> >>
> >> patch has been applied. Thanks.
> >>
> >> Regards
> >>
> >> Marcel
> >>
> >>
> >> --
> >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> >> the body of a message to majordomo@vger.kernel.org
> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >> Please read the FAQ at  http://www.tux.org/lkml/
> 
> 
> > Hi,
> >
> > I have been trying to test Michael's magic mouse drivers against 32.7 (or .8-rc).   Is there a tree
> > based on .32 with these patches?  If not would it be possible to post the patches to lkml?  I do not
> > mind sorting out a few conflicts - this thread assume one knows a little more about the process being
> > used here than is obvious.
> >
> 
> 
> just got one of those magic things as well.
> I did apply the patchs to the current HEAD, but
> am getting a lifeless result i.g. here's what I did:
> 
> sudo /usr/bin/hcitool scan
> sudo /usr/bin/simple-agent hci0 D4:9A:20:88:C7:48
> sudo /usr/bin/dbus-send --system --dest=org.bluez --print-reply
> /org/bluez/1897/hci0/dev_D4_9A_20_88_C7_48 org.bluez.Input.Connect
> sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48
> 
> the thing works after that(no scroll), fast cursor though.
> then reboot
> once up and running nothing.
> cat /var/log/daemon.log (shows this)
> 
> Feb  8 22:57:40 Linux-1 bluetoothd[1973]: link_key_request
> (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
> Feb  8 22:58:21 Linux-1 bluetoothd[1973]: last message repeated 5 times
> Feb  8 22:59:21 Linux-1 bluetoothd[1973]: last message repeated 3 times
> Feb  8 23:03:10 Linux-1 bluetoothd[1973]: link_key_request
> (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)

That means that your computer and the mouse aren't paired. The pin code
for Apple mice is usually "0000" (as opposed to most mice which don't
need pairing, just a poke and setting as trusted).

> (could be missing something though(don't use gnome/kde-bluetooth)although
> mightymouse works).

Cheers

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Bastien Nocera]

On Mon, 2010-02-08 at 23:22 -0800, Justin Mattock wrote:
> > TIA
> > Ed Tomlinson
> >
> > On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
> >> Hi Michael,
> >>
> >> > > looks good to me. I just prefer that you do the allocation of the report
> >> > > descriptor before the HID object:
> >> >
> >> > An updated patch is below.  Sorry for the delay -- inclement weather
> >> > here got in the way of testing this as quickly as I would have liked.
> >> >
> >> > From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
> >> > From: Michael Poole <mdpoole@troilus.org>
> >> > Date: Fri, 5 Feb 2010 12:21:38 -0500
> >> > Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
> >> >
> >> > The report descriptor is read by user space (via the Service
> >> > Discovery Protocol), so it is only available during the ioctl
> >> > to connect.  However, the probe function that needs the
> >> > descriptor might not be called until a specific module is
> >> > loaded.  Keep a copy of the descriptor so it is available for
> >> > later use.
> >>
> >> patch has been applied. Thanks.
> >>
> >> Regards
> >>
> >> Marcel
> >>
> >>
> >> --
> >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> >> the body of a message to majordomo@vger.kernel.org
> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >> Please read the FAQ at  http://www.tux.org/lkml/
> 
> 
> > Hi,
> >
> > I have been trying to test Michael's magic mouse drivers against 32.7 (or .8-rc).   Is there a tree
> > based on .32 with these patches?  If not would it be possible to post the patches to lkml?  I do not
> > mind sorting out a few conflicts - this thread assume one knows a little more about the process being
> > used here than is obvious.
> >
> 
> 
> just got one of those magic things as well.
> I did apply the patchs to the current HEAD, but
> am getting a lifeless result i.g. here's what I did:
> 
> sudo /usr/bin/hcitool scan
> sudo /usr/bin/simple-agent hci0 D4:9A:20:88:C7:48
> sudo /usr/bin/dbus-send --system --dest=org.bluez --print-reply
> /org/bluez/1897/hci0/dev_D4_9A_20_88_C7_48 org.bluez.Input.Connect
> sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48
> 
> the thing works after that(no scroll), fast cursor though.
> then reboot
> once up and running nothing.
> cat /var/log/daemon.log (shows this)
> 
> Feb  8 22:57:40 Linux-1 bluetoothd[1973]: link_key_request
> (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
> Feb  8 22:58:21 Linux-1 bluetoothd[1973]: last message repeated 5 times
> Feb  8 22:59:21 Linux-1 bluetoothd[1973]: last message repeated 3 times
> Feb  8 23:03:10 Linux-1 bluetoothd[1973]: link_key_request
> (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)

That means that your computer and the mouse aren't paired. The pin code
for Apple mice is usually "0000" (as opposed to most mice which don't
need pairing, just a poke and setting as trusted).

> (could be missing something though(don't use gnome/kde-bluetooth)although
> mightymouse works).

Cheers

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Ed Tomlinson]

On Tuesday 09 February 2010 05:14:20 Bastien Nocera wrote:
> On Mon, 2010-02-08 at 23:22 -0800, Justin Mattock wrote:
> > > TIA
> > > Ed Tomlinson
> > >
> > > On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
> > >> Hi Michael,
> > >>
> > >> > > looks good to me. I just prefer that you do the allocation of the report
> > >> > > descriptor before the HID object:
> > >> >
> > >> > An updated patch is below.  Sorry for the delay -- inclement weather
> > >> > here got in the way of testing this as quickly as I would have liked.
> > >> >
> > >> > From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
> > >> > From: Michael Poole <mdpoole@troilus.org>
> > >> > Date: Fri, 5 Feb 2010 12:21:38 -0500
> > >> > Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
> > >> >
> > >> > The report descriptor is read by user space (via the Service
> > >> > Discovery Protocol), so it is only available during the ioctl
> > >> > to connect.  However, the probe function that needs the
> > >> > descriptor might not be called until a specific module is
> > >> > loaded.  Keep a copy of the descriptor so it is available for
> > >> > later use.
> > >>
> > >> patch has been applied. Thanks.
> > >>
> > >> Regards
> > >>
> > >> Marcel
> > >>
> > >>
> > >> --
> > >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > >> the body of a message to majordomo@vger.kernel.org
> > >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > >> Please read the FAQ at  http://www.tux.org/lkml/
> > 
> > 
> > > Hi,
> > >
> > > I have been trying to test Michael's magic mouse drivers against 32.7 (or .8-rc).   Is there a tree
> > > based on .32 with these patches?  If not would it be possible to post the patches to lkml?  I do not
> > > mind sorting out a few conflicts - this thread assume one knows a little more about the process being
> > > used here than is obvious.
> > >
> > 
> > 
> > just got one of those magic things as well.
> > I did apply the patchs to the current HEAD, but
> > am getting a lifeless result i.g. here's what I did:
> > 
> > sudo /usr/bin/hcitool scan
> > sudo /usr/bin/simple-agent hci0 D4:9A:20:88:C7:48
> > sudo /usr/bin/dbus-send --system --dest=org.bluez --print-reply
> > /org/bluez/1897/hci0/dev_D4_9A_20_88_C7_48 org.bluez.Input.Connect
> > sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48
> > 
> > the thing works after that(no scroll), fast cursor though.
> > then reboot
> > once up and running nothing.
> > cat /var/log/daemon.log (shows this)
> > 
> > Feb  8 22:57:40 Linux-1 bluetoothd[1973]: link_key_request
> > (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
> > Feb  8 22:58:21 Linux-1 bluetoothd[1973]: last message repeated 5 times
> > Feb  8 22:59:21 Linux-1 bluetoothd[1973]: last message repeated 3 times
> > Feb  8 23:03:10 Linux-1 bluetoothd[1973]: link_key_request
> > (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
> 
> That means that your computer and the mouse aren't paired. The pin code
> for Apple mice is usually "0000" (as opposed to most mice which don't
> need pairing, just a poke and setting as trusted).
> 
> > (could be missing something though(don't use gnome/kde-bluetooth)although
> > mightymouse works).

The magicmouse part is the easy piece.  What I am looking for is the patches to the kernel
that add the new function to bluetooth allowing the extra probing.  eg the patches (or tree 
based on .32) that addthe initial version of  "hidp_output_raw_report" and friends.

Thanks
Ed 

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Jiri Kosina]

On Tue, 9 Feb 2010, Ed Tomlinson wrote:

> What I am looking for is the patches to the kernel that add the new 
> function to bluetooth allowing the extra probing.  eg the patches (or 
> tree based on .32) that addthe initial version of 
> "hidp_output_raw_report" and friends.

It's commit 2da31939a4 (and fix 6bf8268f9a9 on top of that). You need 
quite recent 2.6.33-rc snapshot to have them both:

	$ git describe --contains 6bf8268f9a9
	v2.6.33-rc7~20^2~3^2

Plus there is additional patch queued in my tree, which allows user to 
specify type of the report that is to be sent (feature/output).

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH 0/2] Provide a driver for the Apple Magic Mouse

[Michael Poole]

I think this patch is ready for real review.  The Magic Mouse requires
that a driver send an unlock Report(Feature) command, similar to the
Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
Input Report that isn't published in the input Report descriptor that
contains touch data (and usually overrides the normal motion and click
Report).

Because the mouse has only one switch and no scroll wheel, the driver
(under control of parameters) emulates a middle button and scroll wheel.
User space could also ignore and/or re-synthesize those events based on
the reported events.

The first patch exports hid_register_report() so the driver can turn on
the multitouch report.  The second patch adds the device ID and the
driver.  Some user-space tools to talk to the mouse directly (that is,
when it is not associated with the host's HIDP stack) are at
http://github.com/entrope/linux-magicmouse .

[PATCH 0/2] Provide a driver for the Apple Magic Mouse

[Michael Poole]

I think this patch is ready for real review.  The Magic Mouse requires
that a driver send an unlock Report(Feature) command, similar to the
Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
Input Report that isn't published in the input Report descriptor that
contains touch data (and usually overrides the normal motion and click
Report).

Because the mouse has only one switch and no scroll wheel, the driver
(under control of parameters) emulates a middle button and scroll wheel.
User space could also ignore and/or re-synthesize those events based on
the reported events.

The first patch exports hid_register_report() so the driver can turn on
the multitouch report.  The second patch adds the device ID and the
driver.  Some user-space tools to talk to the mouse directly (that is,
when it is not associated with the host's HIDP stack) are at
http://github.com/entrope/linux-magicmouse .

[PATCH 1/2] Provide a driver for the Apple Magic Mouse

[Michael Poole]

>From 6fd44770774cd672df6f10e4767f4c17bf90bc30 Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Sun, 24 Jan 2010 22:32:29 -0500
Subject: [RFC PATCH 3/4] Export hid_register_report().

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 3661a62..456838c 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

[PATCH 1/2] Provide a driver for the Apple Magic Mouse

[Michael Poole]

>From 6fd44770774cd672df6f10e4767f4c17bf90bc30 Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.org>
Date: Sun, 24 Jan 2010 22:32:29 -0500
Subject: [RFC PATCH 3/4] Export hid_register_report().

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-IZmAEv5cUt1AfugRpC6u6w@public.gmane.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 3661a62..456838c 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

[PATCH 1/2] Provide a driver for the Apple Magic Mouse

[Michael Poole]

>From 6fd44770774cd672df6f10e4767f4c17bf90bc30 Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Sun, 24 Jan 2010 22:32:29 -0500
Subject: [RFC PATCH 3/4] Export hid_register_report().

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 3661a62..456838c 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

[PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

>From da3e2b0330fccd584ad79495853e638e9652155b Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Sat, 6 Feb 2010 12:24:36 -0500
Subject: Add a device driver for the Apple Magic Mouse.

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 |  469 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 482 insertions(+), 0 deletions(-)
 create mode 100644 drivers/hid/hid-magicmouse.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 24d90ea..ba14ec8 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 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..f94b3e4
--- /dev/null
+++ b/drivers/hid/hid-magicmouse.c
@@ -0,0 +1,469 @@
+/*
+ *   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");
+
+#define TOUCH_REPORT_ID   0x29
+/* These definitions are not precise, but they're close enough.  (Bits
+ * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
+ * to be some kind of bit mask -- 0x20 may be a near-field reading,
+ * and 0x40 is actual contact, and 0x10 may be a start/stop or change
+ * indication.)
+ */
+#define TOUCH_STATE_MASK  0xf0
+#define TOUCH_STATE_NONE  0x00
+#define TOUCH_STATE_START 0x30
+#define TOUCH_STATE_DRAG  0x40
+
+/**
+ * struct magicmouse_sc - Tracks Magic Mouse-specific data.
+ * @input: Input device through which we report events.
+ * @quirks: Currently unused.
+ * @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.
+ * @scroll_accel: Number of consecutive scroll motions.
+ * @scroll_jiffies: Time of last scroll motion.
+ * @touches: Most recent data for a touch, indexed by tracking ID.
+ * @tracking_ids: Mapping of current touch input data to @touches.
+ */
+struct magicmouse_sc {
+	struct input_dev *input;
+	unsigned long quirks;
+
+	int last_timestamp;
+	int delta_time;
+	int ntouches;
+	int scroll_accel;
+	unsigned long scroll_jiffies;
+
+	struct {
+		short x;
+		short y;
+		short scroll_y;
+		u8 size;
+	} touches[16];
+	int tracking_ids[16];
+};
+
+static int magicmouse_firm_touch(struct magicmouse_sc *msc)
+{
+	int touch = -1;
+	int ii;
+
+	/* If there is only one "firm" touch, set touch to its
+	 * tracking ID.
+	 */
+	for (ii = 0; ii < msc->ntouches; ii++) {
+		int idx = msc->tracking_ids[ii];
+		if (msc->touches[idx].size < 8) {
+			/* Ignore this touch. */
+		} else if (touch >= 0) {
+			touch = -1;
+			break;
+		} else {
+			touch = idx;
+		}
+	}
+
+	return touch;
+}
+
+static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
+{
+        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
+                test_bit(BTN_RIGHT, msc->input->key) << 1 |
+                test_bit(BTN_MIDDLE, msc->input->key) << 2;
+
+	if (emulate_3button) {
+		int id;
+
+		/* If some button was pressed before, keep it held
+		 * down.  Otherwise, if there's exactly one firm
+		 * touch, use that to override the mouse's guess.
+		 */
+		if (state == 0) {
+			/* The button was released. */
+		} else if (last_state != 0) {
+			state = last_state;
+		} else if ((id = magicmouse_firm_touch(msc)) >= 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;
+		} /* else: we keep the mouse's guess */
+
+		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);
+
+	if (state != last_state)
+		msc->scroll_accel = 0;
+}
+
+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;
+	int 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 and other fields. */
+	msc->tracking_ids[raw_id] = id;
+	msc->touches[id].x = x;
+	msc->touches[id].y = y;
+	msc->touches[id].size = misc & 63;
+
+	/* If requested, emulate a scroll wheel by detecting small
+	 * vertical touch motions along the middle of the mouse.
+	 */
+	if (emulate_scroll_wheel &&
+	    middle_button_start < x && x < middle_button_stop) {
+		static const int accel_profile[] = {
+			256, 228, 192, 160, 128, 96, 64, 32,
+		};
+		unsigned long now = jiffies;
+		int step = msc->touches[id].scroll_y - y;
+
+		/* Reset acceleration after half a second. */
+		if (time_after(now, msc->scroll_jiffies + HZ / 2))
+			msc->scroll_accel = 0;
+
+		/* Calculate and apply the scroll motion. */
+		switch (tdata[7] & TOUCH_STATE_MASK) {
+		case TOUCH_STATE_START:
+			msc->touches[id].scroll_y = y;
+                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
+						ARRAY_SIZE(accel_profile) - 1);
+			break;
+		case TOUCH_STATE_DRAG:
+			step = step / accel_profile[msc->scroll_accel];
+			if (step != 0) {
+				msc->touches[id].scroll_y = y;
+				msc->scroll_jiffies = now;
+				input_report_rel(input, REL_WHEEL, step);
+			}
+			break;
+		}
+	}
+
+	/* Generate the input events for this touch. */
+	if (report_touches) {
+                int orientation = (misc >> 10) - 32;
+
+		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, orientation);
+		input_report_abs(input, ABS_MT_POSITION_X, x);
+		input_report_abs(input, ABS_MT_POSITION_Y, y);
+
+		if (report_undeciphered) {
+			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
+		}
+
+		input_mt_sync(input);
+	}
+}
+
+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 x, y, ts, ii, clicks;
+
+	switch (data[0]) {
+	case 0x10:
+		if (size != 6)
+			return 0;
+		x = (__s16)(data[2] | data[3] << 8);
+		y = (__s16)(data[4] | data[5] << 8);
+		clicks = data[1];
+		break;
+	case TOUCH_REPORT_ID:
+		/* 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.
+		 */
+		x = (signed char)data[1];
+		y = (signed char)data[2];
+		clicks = data[3];
+		break;
+	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;
+	}
+
+	magicmouse_emit_buttons(msc, clicks & 3);
+	input_report_rel(input, REL_X, x);
+	input_report_rel(input, REL_Y, y);
+	input_sync(input);
+	return 1;
+}
+
+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, TOUCH_REPORT_ID);
+	if (!report) {
+		dev_err(&hdev->dev, "unable to register touch report\n");
+		ret = -ENOMEM;
+		goto err_free;
+	}
+	report->size = 6;
+
+	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
+			HID_FEATURE_REPORT);
+	if (ret != sizeof(feature_1)) {
+		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
+				ret);
+		goto err_free;
+	}
+	ret = hdev->hid_output_raw_report(hdev, feature_2,
+			sizeof(feature_2), HID_FEATURE_REPORT);
+	if (ret != sizeof(feature_2)) {
+		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
+				ret);
+		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

[PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

>From da3e2b0330fccd584ad79495853e638e9652155b Mon Sep 17 00:00:00 2001
From: Michael Poole <mdpoole@troilus.org>
Date: Sat, 6 Feb 2010 12:24:36 -0500
Subject: Add a device driver for the Apple Magic Mouse.

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 |  469 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 482 insertions(+), 0 deletions(-)
 create mode 100644 drivers/hid/hid-magicmouse.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 24d90ea..ba14ec8 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 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..f94b3e4
--- /dev/null
+++ b/drivers/hid/hid-magicmouse.c
@@ -0,0 +1,469 @@
+/*
+ *   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");
+
+#define TOUCH_REPORT_ID   0x29
+/* These definitions are not precise, but they're close enough.  (Bits
+ * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
+ * to be some kind of bit mask -- 0x20 may be a near-field reading,
+ * and 0x40 is actual contact, and 0x10 may be a start/stop or change
+ * indication.)
+ */
+#define TOUCH_STATE_MASK  0xf0
+#define TOUCH_STATE_NONE  0x00
+#define TOUCH_STATE_START 0x30
+#define TOUCH_STATE_DRAG  0x40
+
+/**
+ * struct magicmouse_sc - Tracks Magic Mouse-specific data.
+ * @input: Input device through which we report events.
+ * @quirks: Currently unused.
+ * @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.
+ * @scroll_accel: Number of consecutive scroll motions.
+ * @scroll_jiffies: Time of last scroll motion.
+ * @touches: Most recent data for a touch, indexed by tracking ID.
+ * @tracking_ids: Mapping of current touch input data to @touches.
+ */
+struct magicmouse_sc {
+	struct input_dev *input;
+	unsigned long quirks;
+
+	int last_timestamp;
+	int delta_time;
+	int ntouches;
+	int scroll_accel;
+	unsigned long scroll_jiffies;
+
+	struct {
+		short x;
+		short y;
+		short scroll_y;
+		u8 size;
+	} touches[16];
+	int tracking_ids[16];
+};
+
+static int magicmouse_firm_touch(struct magicmouse_sc *msc)
+{
+	int touch = -1;
+	int ii;
+
+	/* If there is only one "firm" touch, set touch to its
+	 * tracking ID.
+	 */
+	for (ii = 0; ii < msc->ntouches; ii++) {
+		int idx = msc->tracking_ids[ii];
+		if (msc->touches[idx].size < 8) {
+			/* Ignore this touch. */
+		} else if (touch >= 0) {
+			touch = -1;
+			break;
+		} else {
+			touch = idx;
+		}
+	}
+
+	return touch;
+}
+
+static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
+{
+        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
+                test_bit(BTN_RIGHT, msc->input->key) << 1 |
+                test_bit(BTN_MIDDLE, msc->input->key) << 2;
+
+	if (emulate_3button) {
+		int id;
+
+		/* If some button was pressed before, keep it held
+		 * down.  Otherwise, if there's exactly one firm
+		 * touch, use that to override the mouse's guess.
+		 */
+		if (state == 0) {
+			/* The button was released. */
+		} else if (last_state != 0) {
+			state = last_state;
+		} else if ((id = magicmouse_firm_touch(msc)) >= 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;
+		} /* else: we keep the mouse's guess */
+
+		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);
+
+	if (state != last_state)
+		msc->scroll_accel = 0;
+}
+
+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;
+	int 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 and other fields. */
+	msc->tracking_ids[raw_id] = id;
+	msc->touches[id].x = x;
+	msc->touches[id].y = y;
+	msc->touches[id].size = misc & 63;
+
+	/* If requested, emulate a scroll wheel by detecting small
+	 * vertical touch motions along the middle of the mouse.
+	 */
+	if (emulate_scroll_wheel &&
+	    middle_button_start < x && x < middle_button_stop) {
+		static const int accel_profile[] = {
+			256, 228, 192, 160, 128, 96, 64, 32,
+		};
+		unsigned long now = jiffies;
+		int step = msc->touches[id].scroll_y - y;
+
+		/* Reset acceleration after half a second. */
+		if (time_after(now, msc->scroll_jiffies + HZ / 2))
+			msc->scroll_accel = 0;
+
+		/* Calculate and apply the scroll motion. */
+		switch (tdata[7] & TOUCH_STATE_MASK) {
+		case TOUCH_STATE_START:
+			msc->touches[id].scroll_y = y;
+                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
+						ARRAY_SIZE(accel_profile) - 1);
+			break;
+		case TOUCH_STATE_DRAG:
+			step = step / accel_profile[msc->scroll_accel];
+			if (step != 0) {
+				msc->touches[id].scroll_y = y;
+				msc->scroll_jiffies = now;
+				input_report_rel(input, REL_WHEEL, step);
+			}
+			break;
+		}
+	}
+
+	/* Generate the input events for this touch. */
+	if (report_touches) {
+                int orientation = (misc >> 10) - 32;
+
+		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, orientation);
+		input_report_abs(input, ABS_MT_POSITION_X, x);
+		input_report_abs(input, ABS_MT_POSITION_Y, y);
+
+		if (report_undeciphered) {
+			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
+		}
+
+		input_mt_sync(input);
+	}
+}
+
+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 x, y, ts, ii, clicks;
+
+	switch (data[0]) {
+	case 0x10:
+		if (size != 6)
+			return 0;
+		x = (__s16)(data[2] | data[3] << 8);
+		y = (__s16)(data[4] | data[5] << 8);
+		clicks = data[1];
+		break;
+	case TOUCH_REPORT_ID:
+		/* 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.
+		 */
+		x = (signed char)data[1];
+		y = (signed char)data[2];
+		clicks = data[3];
+		break;
+	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;
+	}
+
+	magicmouse_emit_buttons(msc, clicks & 3);
+	input_report_rel(input, REL_X, x);
+	input_report_rel(input, REL_Y, y);
+	input_sync(input);
+	return 1;
+}
+
+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, TOUCH_REPORT_ID);
+	if (!report) {
+		dev_err(&hdev->dev, "unable to register touch report\n");
+		ret = -ENOMEM;
+		goto err_free;
+	}
+	report->size = 6;
+
+	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
+			HID_FEATURE_REPORT);
+	if (ret != sizeof(feature_1)) {
+		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
+				ret);
+		goto err_free;
+	}
+	ret = hdev->hid_output_raw_report(hdev, feature_2,
+			sizeof(feature_2), HID_FEATURE_REPORT);
+	if (ret != sizeof(feature_2)) {
+		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
+				ret);
+		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

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Jiri Kosina]

On Tue, 9 Feb 2010, Michael Poole wrote:

> >From da3e2b0330fccd584ad79495853e638e9652155b Mon Sep 17 00:00:00 2001
> From: Michael Poole <mdpoole@troilus.org>
> Date: Sat, 6 Feb 2010 12:24:36 -0500
> Subject: Add a device driver for the Apple Magic Mouse.
> 
> 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 |  469 ++++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 482 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/hid/hid-magicmouse.c
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 24d90ea..ba14ec8 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

Could you please make this something else than "Apple"? This string is 
already used by HID_APPLE.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Jiri Kosina]

On Tue, 9 Feb 2010, Michael Poole wrote:

> >From da3e2b0330fccd584ad79495853e638e9652155b Mon Sep 17 00:00:00 2001
> From: Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.org>
> Date: Sat, 6 Feb 2010 12:24:36 -0500
> Subject: Add a device driver for the Apple Magic Mouse.
> 
> Signed-off-by: Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.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 |  469 ++++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 482 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/hid/hid-magicmouse.c
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 24d90ea..ba14ec8 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

Could you please make this something else than "Apple"? This string is 
already used by HID_APPLE.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Jiri Kosina]

On Wed, 10 Feb 2010, Jiri Kosina wrote:

> > +config HID_MAGICMOUSE
> > +	tristate "Apple" if EMBEDDED
> 
> Could you please make this something else than "Apple"? This string is 
> already used by HID_APPLE.

I have fixed this up on my side, no need for you to respin.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Jiri Kosina]

On Wed, 10 Feb 2010, Jiri Kosina wrote:

> > +config HID_MAGICMOUSE
> > +	tristate "Apple" if EMBEDDED
> 
> Could you please make this something else than "Apple"? This string is 
> already used by HID_APPLE.

I have fixed this up on my side, no need for you to respin.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Dmitry Torokhov]

Hi Michael,

On Tue, Feb 09, 2010 at 08:13:08AM -0500, Michael Poole wrote:
> +
> +static bool emulate_3button = 1;

If it is a bool then values should be true/false.

> +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;

No need to initialize statics to 0/false.

> +module_param(report_undeciphered, bool, 0644);
> +MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
> +
> +#define TOUCH_REPORT_ID   0x29
> +/* These definitions are not precise, but they're close enough.  (Bits
> + * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
> + * to be some kind of bit mask -- 0x20 may be a near-field reading,
> + * and 0x40 is actual contact, and 0x10 may be a start/stop or change
> + * indication.)
> + */
> +#define TOUCH_STATE_MASK  0xf0
> +#define TOUCH_STATE_NONE  0x00
> +#define TOUCH_STATE_START 0x30
> +#define TOUCH_STATE_DRAG  0x40
> +
> +/**
> + * struct magicmouse_sc - Tracks Magic Mouse-specific data.
> + * @input: Input device through which we report events.
> + * @quirks: Currently unused.
> + * @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.
> + * @scroll_accel: Number of consecutive scroll motions.
> + * @scroll_jiffies: Time of last scroll motion.
> + * @touches: Most recent data for a touch, indexed by tracking ID.
> + * @tracking_ids: Mapping of current touch input data to @touches.
> + */
> +struct magicmouse_sc {
> +	struct input_dev *input;
> +	unsigned long quirks;
> +
> +	int last_timestamp;
> +	int delta_time;
> +	int ntouches;
> +	int scroll_accel;
> +	unsigned long scroll_jiffies;
> +
> +	struct {
> +		short x;
> +		short y;
> +		short scroll_y;
> +		u8 size;
> +	} touches[16];
> +	int tracking_ids[16];
> +};
> +
> +static int magicmouse_firm_touch(struct magicmouse_sc *msc)
> +{
> +	int touch = -1;
> +	int ii;
> +
> +	/* If there is only one "firm" touch, set touch to its
> +	 * tracking ID.
> +	 */
> +	for (ii = 0; ii < msc->ntouches; ii++) {
> +		int idx = msc->tracking_ids[ii];
> +		if (msc->touches[idx].size < 8) {
> +			/* Ignore this touch. */
> +		} else if (touch >= 0) {
> +			touch = -1;
> +			break;
> +		} else {
> +			touch = idx;
> +		}
> +	}
> +
> +	return touch;
> +}
> +
> +static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
> +{
> +        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
> +                test_bit(BTN_RIGHT, msc->input->key) << 1 |
> +                test_bit(BTN_MIDDLE, msc->input->key) << 2;

Indented with spaces, we prefer tabs.

> +
> +	if (emulate_3button) {
> +		int id;
> +
> +		/* If some button was pressed before, keep it held
> +		 * down.  Otherwise, if there's exactly one firm
> +		 * touch, use that to override the mouse's guess.
> +		 */
> +		if (state == 0) {
> +			/* The button was released. */
> +		} else if (last_state != 0) {
> +			state = last_state;
> +		} else if ((id = magicmouse_firm_touch(msc)) >= 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;
> +		} /* else: we keep the mouse's guess */
> +
> +		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);
> +
> +	if (state != last_state)
> +		msc->scroll_accel = 0;
> +}
> +
> +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;
> +	int 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 and other fields. */
> +	msc->tracking_ids[raw_id] = id;
> +	msc->touches[id].x = x;
> +	msc->touches[id].y = y;
> +	msc->touches[id].size = misc & 63;
> +
> +	/* If requested, emulate a scroll wheel by detecting small
> +	 * vertical touch motions along the middle of the mouse.
> +	 */
> +	if (emulate_scroll_wheel &&
> +	    middle_button_start < x && x < middle_button_stop) {
> +		static const int accel_profile[] = {
> +			256, 228, 192, 160, 128, 96, 64, 32,
> +		};
> +		unsigned long now = jiffies;
> +		int step = msc->touches[id].scroll_y - y;
> +
> +		/* Reset acceleration after half a second. */
> +		if (time_after(now, msc->scroll_jiffies + HZ / 2))
> +			msc->scroll_accel = 0;
> +
> +		/* Calculate and apply the scroll motion. */
> +		switch (tdata[7] & TOUCH_STATE_MASK) {
> +		case TOUCH_STATE_START:
> +			msc->touches[id].scroll_y = y;
> +                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
> +						ARRAY_SIZE(accel_profile) - 1);
> +			break;
> +		case TOUCH_STATE_DRAG:
> +			step = step / accel_profile[msc->scroll_accel];
> +			if (step != 0) {
> +				msc->touches[id].scroll_y = y;
> +				msc->scroll_jiffies = now;
> +				input_report_rel(input, REL_WHEEL, step);
> +			}
> +			break;
> +		}
> +	}
> +
> +	/* Generate the input events for this touch. */
> +	if (report_touches) {
> +                int orientation = (misc >> 10) - 32;
> +
> +		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, orientation);
> +		input_report_abs(input, ABS_MT_POSITION_X, x);
> +		input_report_abs(input, ABS_MT_POSITION_Y, y);
> +
> +		if (report_undeciphered) {
> +			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
> +		}

No need for braces for single statement.

> +
> +		input_mt_sync(input);
> +	}
> +}
> +
> +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 x, y, ts, ii, clicks;
> +
> +	switch (data[0]) {
> +	case 0x10:
> +		if (size != 6)
> +			return 0;
> +		x = (__s16)(data[2] | data[3] << 8);
> +		y = (__s16)(data[4] | data[5] << 8);
> +		clicks = data[1];
> +		break;
> +	case TOUCH_REPORT_ID:
> +		/* 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.
> +		 */
> +		x = (signed char)data[1];
> +		y = (signed char)data[2];
> +		clicks = data[3];
> +		break;
> +	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;
> +	}
> +
> +	magicmouse_emit_buttons(msc, clicks & 3);
> +	input_report_rel(input, REL_X, x);
> +	input_report_rel(input, REL_Y, y);
> +	input_sync(input);
> +	return 1;
> +}
> +
> +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);

I'd use __set_bit() instead, no need to lock the bus.

> +
> +	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;

input_set_abs_params() is a bit more compact.

> +
> +		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, TOUCH_REPORT_ID);
> +	if (!report) {
> +		dev_err(&hdev->dev, "unable to register touch report\n");
> +		ret = -ENOMEM;
> +		goto err_free;
> +	}
> +	report->size = 6;
> +
> +	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
> +			HID_FEATURE_REPORT);

This will cause transmission of on-stack data through USB which it does
not like.

> +	if (ret != sizeof(feature_1)) {
> +		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
> +				ret);
> +		goto err_free;
> +	}
> +	ret = hdev->hid_output_raw_report(hdev, feature_2,
> +			sizeof(feature_2), HID_FEATURE_REPORT);

Same here.

> +	if (ret != sizeof(feature_2)) {
> +		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
> +				ret);
> +		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;

hid_hw_stop() is missing in error path. Also see question about freeing
report below.

> +}
> +
> +static void magicmouse_remove(struct hid_device *hdev)
> +{

Do we need to unregister report (I am not that familiar with HID, who is
responsible for cleaning report lists?)?

> +	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
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-input" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 
Dmitry

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

I'll post a patch for these based on Jiri's for-next tree this evening.

Dmitry Torokhov writes:

> Hi Michael,
>
> On Tue, Feb 09, 2010 at 08:13:08AM -0500, Michael Poole wrote:
>> +
>> +static bool emulate_3button = 1;
>
> If it is a bool then values should be true/false.

Thanks.

>> +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;
>
> No need to initialize statics to 0/false.

Okay, I'll remote that.

[snip]
>> +        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
>> +                test_bit(BTN_RIGHT, msc->input->key) << 1 |
>> +                test_bit(BTN_MIDDLE, msc->input->key) << 2;
>
> Indented with spaces, we prefer tabs.

Whoops -- one of my machines must be misconfigured.  I'll fix that.

[snip]
>> +		if (report_undeciphered) {
>> +			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
>> +		}
>
> No need for braces for single statement.

Okay.

[snip]
>> +	if (emulate_scroll_wheel)
>> +		set_bit(REL_WHEEL, input->relbit);
>
> I'd use __set_bit() instead, no need to lock the bus.

Okay.  I wasn't aware of that semantic difference.

>> +
>> +	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;
>
> input_set_abs_params() is a bit more compact.

Thanks -- more idiomatic is always handy.

[snip]
>> +	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
>> +			HID_FEATURE_REPORT);
>
> This will cause transmission of on-stack data through USB which it does
> not like.

Current Magic Mouse devices are Bluetooth-only.  Is this an issue for
that stack as well?  (hid-sony.c and hid-wacom.c also use
hid_output_raw_report() with on-stack buffers for Bluetooth devices --
if they need it too, I can write a patch for those.  I have a PS3
controller that I can test with, but don't have a Wacom tablet.)  Would
making those buffers static put them in an appropriate section, or does
the memory need to be allocated from a heap?

>> +	if (ret != sizeof(feature_1)) {
>> +		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
>> +				ret);
>> +		goto err_free;
>> +	}
>> +	ret = hdev->hid_output_raw_report(hdev, feature_2,
>> +			sizeof(feature_2), HID_FEATURE_REPORT);
>
> Same here.
>
>> +	if (ret != sizeof(feature_2)) {
>> +		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
>> +				ret);
>> +		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;
>
> hid_hw_stop() is missing in error path. Also see question about freeing
> report below.

Thanks, I'll add the hid_hw_stop().

>> +}
>> +
>> +static void magicmouse_remove(struct hid_device *hdev)
>> +{
>
> Do we need to unregister report (I am not that familiar with HID, who is
> responsible for cleaning report lists?)?

hid-core.c's hid_device_release() frees all the reports that registered
with hid_register_report().

Michael Poole

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

I'll post a patch for these based on Jiri's for-next tree this evening.

Dmitry Torokhov writes:

> Hi Michael,
>
> On Tue, Feb 09, 2010 at 08:13:08AM -0500, Michael Poole wrote:
>> +
>> +static bool emulate_3button = 1;
>
> If it is a bool then values should be true/false.

Thanks.

>> +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;
>
> No need to initialize statics to 0/false.

Okay, I'll remote that.

[snip]
>> +        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
>> +                test_bit(BTN_RIGHT, msc->input->key) << 1 |
>> +                test_bit(BTN_MIDDLE, msc->input->key) << 2;
>
> Indented with spaces, we prefer tabs.

Whoops -- one of my machines must be misconfigured.  I'll fix that.

[snip]
>> +		if (report_undeciphered) {
>> +			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
>> +		}
>
> No need for braces for single statement.

Okay.

[snip]
>> +	if (emulate_scroll_wheel)
>> +		set_bit(REL_WHEEL, input->relbit);
>
> I'd use __set_bit() instead, no need to lock the bus.

Okay.  I wasn't aware of that semantic difference.

>> +
>> +	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;
>
> input_set_abs_params() is a bit more compact.

Thanks -- more idiomatic is always handy.

[snip]
>> +	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
>> +			HID_FEATURE_REPORT);
>
> This will cause transmission of on-stack data through USB which it does
> not like.

Current Magic Mouse devices are Bluetooth-only.  Is this an issue for
that stack as well?  (hid-sony.c and hid-wacom.c also use
hid_output_raw_report() with on-stack buffers for Bluetooth devices --
if they need it too, I can write a patch for those.  I have a PS3
controller that I can test with, but don't have a Wacom tablet.)  Would
making those buffers static put them in an appropriate section, or does
the memory need to be allocated from a heap?

>> +	if (ret != sizeof(feature_1)) {
>> +		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
>> +				ret);
>> +		goto err_free;
>> +	}
>> +	ret = hdev->hid_output_raw_report(hdev, feature_2,
>> +			sizeof(feature_2), HID_FEATURE_REPORT);
>
> Same here.
>
>> +	if (ret != sizeof(feature_2)) {
>> +		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
>> +				ret);
>> +		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;
>
> hid_hw_stop() is missing in error path. Also see question about freeing
> report below.

Thanks, I'll add the hid_hw_stop().

>> +}
>> +
>> +static void magicmouse_remove(struct hid_device *hdev)
>> +{
>
> Do we need to unregister report (I am not that familiar with HID, who is
> responsible for cleaning report lists?)?

hid-core.c's hid_device_release() frees all the reports that registered
with hid_register_report().

Michael Poole

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

I'll post a patch for these based on Jiri's for-next tree this evening.

Dmitry Torokhov writes:

> Hi Michael,
>
> On Tue, Feb 09, 2010 at 08:13:08AM -0500, Michael Poole wrote:
>> +
>> +static bool emulate_3button = 1;
>
> If it is a bool then values should be true/false.

Thanks.

>> +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;
>
> No need to initialize statics to 0/false.

Okay, I'll remote that.

[snip]
>> +        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
>> +                test_bit(BTN_RIGHT, msc->input->key) << 1 |
>> +                test_bit(BTN_MIDDLE, msc->input->key) << 2;
>
> Indented with spaces, we prefer tabs.

Whoops -- one of my machines must be misconfigured.  I'll fix that.

[snip]
>> +		if (report_undeciphered) {
>> +			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
>> +		}
>
> No need for braces for single statement.

Okay.

[snip]
>> +	if (emulate_scroll_wheel)
>> +		set_bit(REL_WHEEL, input->relbit);
>
> I'd use __set_bit() instead, no need to lock the bus.

Okay.  I wasn't aware of that semantic difference.

>> +
>> +	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;
>
> input_set_abs_params() is a bit more compact.

Thanks -- more idiomatic is always handy.

[snip]
>> +	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
>> +			HID_FEATURE_REPORT);
>
> This will cause transmission of on-stack data through USB which it does
> not like.

Current Magic Mouse devices are Bluetooth-only.  Is this an issue for
that stack as well?  (hid-sony.c and hid-wacom.c also use
hid_output_raw_report() with on-stack buffers for Bluetooth devices --
if they need it too, I can write a patch for those.  I have a PS3
controller that I can test with, but don't have a Wacom tablet.)  Would
making those buffers static put them in an appropriate section, or does
the memory need to be allocated from a heap?

>> +	if (ret != sizeof(feature_1)) {
>> +		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
>> +				ret);
>> +		goto err_free;
>> +	}
>> +	ret = hdev->hid_output_raw_report(hdev, feature_2,
>> +			sizeof(feature_2), HID_FEATURE_REPORT);
>
> Same here.
>
>> +	if (ret != sizeof(feature_2)) {
>> +		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
>> +				ret);
>> +		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;
>
> hid_hw_stop() is missing in error path. Also see question about freeing
> report below.

Thanks, I'll add the hid_hw_stop().

>> +}
>> +
>> +static void magicmouse_remove(struct hid_device *hdev)
>> +{
>
> Do we need to unregister report (I am not that familiar with HID, who is
> responsible for cleaning report lists?)?

hid-core.c's hid_device_release() frees all the reports that registered
with hid_register_report().

Michael Poole

[PATCH] hid-magicmouse: Coding style and probe failure fixes.

[Michael Poole]

>From 04b395dbbd1ad2b836188e6f125940ae8fac6925 Mon Sep 17 00:00:00 2001

As suggested by Dmitry Torokhov on 10 Feb: Use proper values
to initialize bool configuration variables, tabs rather than
spaces, no braces for one-line else clause, __set_bit() when
the operation doesn't have to be atomic, input_set_abs_params()
rather than writing the fields directly, and call hid_hw_stop()
when appropriate to handle failures in the probe.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
Dmitry and Jiri,

I haven't had a chance to run-test these changes yet -- hid/for-next
causes corrupt X display on my laptop, whereas v2.6.33-rc6 and -rc7 are
fine; I'm still bisecting to figure out the cause -- but this patch is
not complicated.  (It does compile.)

I left the buffers for hdev->hid_output_raw_report() on the stack
because the Bluetooth HIDP code memcpy's the contents into a freshly
allocated skb.

Michael

 drivers/hid/hid-magicmouse.c |  100 +++++++++++++++++-------------------------
 1 files changed, 40 insertions(+), 60 deletions(-)

diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index f94b3e4..4a3a94f 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -18,22 +18,22 @@
 
 #include "hid-ids.h"
 
-static bool emulate_3button = 1;
+static bool emulate_3button = true;
 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;
+static bool emulate_scroll_wheel = true;
 module_param(emulate_scroll_wheel, bool, 0644);
 MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
 
-static bool report_touches = 1;
+static bool report_touches = true;
 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;
+static bool report_undeciphered;
 module_param(report_undeciphered, bool, 0644);
 MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
 
@@ -108,9 +108,9 @@ static int magicmouse_firm_touch(struct magicmouse_sc *msc)
 
 static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 {
-        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
-                test_bit(BTN_RIGHT, msc->input->key) << 1 |
-                test_bit(BTN_MIDDLE, msc->input->key) << 2;
+	int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
+		test_bit(BTN_RIGHT, msc->input->key) << 1 |
+		test_bit(BTN_MIDDLE, msc->input->key) << 2;
 
 	if (emulate_3button) {
 		int id;
@@ -177,7 +177,7 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 		switch (tdata[7] & TOUCH_STATE_MASK) {
 		case TOUCH_STATE_START:
 			msc->touches[id].scroll_y = y;
-                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
+			msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
 						ARRAY_SIZE(accel_profile) - 1);
 			break;
 		case TOUCH_STATE_DRAG:
@@ -193,7 +193,7 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 
 	/* Generate the input events for this touch. */
 	if (report_touches) {
-                int orientation = (misc >> 10) - 32;
+		int orientation = (misc >> 10) - 32;
 
 		input_report_abs(input, ABS_MT_TRACKING_ID, id);
 		input_report_abs(input, ABS_MT_TOUCH_MAJOR, tdata[3]);
@@ -202,9 +202,8 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 		input_report_abs(input, ABS_MT_POSITION_X, x);
 		input_report_abs(input, ABS_MT_POSITION_Y, y);
 
-		if (report_undeciphered) {
+		if (report_undeciphered)
 			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
-		}
 
 		input_mt_sync(input);
 	}
@@ -291,62 +290,41 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
 	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);
+	__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(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);
+	__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);
+		__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;
-
+		__set_bit(EV_ABS, input->evbit);
+
+		input_set_abs_params(input, ABS_MT_TRACKING_ID, 0, 15, 0, 0);
+		input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 4, 0);
+		input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 4, 0);
+		input_set_abs_params(input, ABS_MT_ORIENTATION, -32, 31, 1, 0);
+		input_set_abs_params(input, ABS_MT_POSITION_X, -1100, 1358,
+				4, 0);
 		/* 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;
+		input_set_abs_params(input, ABS_MT_POSITION_Y, -1589, 2047,
+				4, 0);
 	}
 
 	if (report_undeciphered) {
-		set_bit(EV_MSC, input->evbit);
-		set_bit(MSC_RAW, input->mscbit);
+		__set_bit(EV_MSC, input->evbit);
+		__set_bit(MSC_RAW, input->mscbit);
 	}
 }
 
@@ -385,7 +363,7 @@ static int magicmouse_probe(struct hid_device *hdev,
 	if (!report) {
 		dev_err(&hdev->dev, "unable to register touch report\n");
 		ret = -ENOMEM;
-		goto err_free;
+		goto err_stop_hw;
 	}
 	report->size = 6;
 
@@ -394,35 +372,37 @@ static int magicmouse_probe(struct hid_device *hdev,
 	if (ret != sizeof(feature_1)) {
 		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
 				ret);
-		goto err_free;
+		goto err_stop_hw;
 	}
 	ret = hdev->hid_output_raw_report(hdev, feature_2,
 			sizeof(feature_2), HID_FEATURE_REPORT);
 	if (ret != sizeof(feature_2)) {
 		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
 				ret);
-		goto err_free;
+		goto err_stop_hw;
 	}
 
 	input = input_allocate_device();
 	if (!input) {
 		dev_err(&hdev->dev, "can't alloc input device\n");
 		ret = -ENOMEM;
-		goto err_free;
+		goto err_stop_hw;
 	}
 	magicmouse_setup_input(input, hdev);
 
 	ret = input_register_device(input);
 	if (ret) {
 		dev_err(&hdev->dev, "input device registration failed\n");
-		goto err_both;
+		goto err_input;
 	}
 	msc->input = input;
 
 	return 0;
- err_both:
+err_input:
 	input_free_device(input);
- err_free:
+err_stop_hw:
+	hid_hw_stop(hdev);
+err_free:
 	kfree(msc);
 	return ret;
 }
-- 
1.6.5.6

[PATCH] hid-magicmouse: Coding style and probe failure fixes.

[Michael Poole]

>From 04b395dbbd1ad2b836188e6f125940ae8fac6925 Mon Sep 17 00:00:00 2001

As suggested by Dmitry Torokhov on 10 Feb: Use proper values
to initialize bool configuration variables, tabs rather than
spaces, no braces for one-line else clause, __set_bit() when
the operation doesn't have to be atomic, input_set_abs_params()
rather than writing the fields directly, and call hid_hw_stop()
when appropriate to handle failures in the probe.

Signed-off-by: Michael Poole <mdpoole@troilus.org>
---
Dmitry and Jiri,

I haven't had a chance to run-test these changes yet -- hid/for-next
causes corrupt X display on my laptop, whereas v2.6.33-rc6 and -rc7 are
fine; I'm still bisecting to figure out the cause -- but this patch is
not complicated.  (It does compile.)

I left the buffers for hdev->hid_output_raw_report() on the stack
because the Bluetooth HIDP code memcpy's the contents into a freshly
allocated skb.

Michael

 drivers/hid/hid-magicmouse.c |  100 +++++++++++++++++-------------------------
 1 files changed, 40 insertions(+), 60 deletions(-)

diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index f94b3e4..4a3a94f 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -18,22 +18,22 @@
 
 #include "hid-ids.h"
 
-static bool emulate_3button = 1;
+static bool emulate_3button = true;
 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;
+static bool emulate_scroll_wheel = true;
 module_param(emulate_scroll_wheel, bool, 0644);
 MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
 
-static bool report_touches = 1;
+static bool report_touches = true;
 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;
+static bool report_undeciphered;
 module_param(report_undeciphered, bool, 0644);
 MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
 
@@ -108,9 +108,9 @@ static int magicmouse_firm_touch(struct magicmouse_sc *msc)
 
 static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 {
-        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
-                test_bit(BTN_RIGHT, msc->input->key) << 1 |
-                test_bit(BTN_MIDDLE, msc->input->key) << 2;
+	int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
+		test_bit(BTN_RIGHT, msc->input->key) << 1 |
+		test_bit(BTN_MIDDLE, msc->input->key) << 2;
 
 	if (emulate_3button) {
 		int id;
@@ -177,7 +177,7 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 		switch (tdata[7] & TOUCH_STATE_MASK) {
 		case TOUCH_STATE_START:
 			msc->touches[id].scroll_y = y;
-                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
+			msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
 						ARRAY_SIZE(accel_profile) - 1);
 			break;
 		case TOUCH_STATE_DRAG:
@@ -193,7 +193,7 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 
 	/* Generate the input events for this touch. */
 	if (report_touches) {
-                int orientation = (misc >> 10) - 32;
+		int orientation = (misc >> 10) - 32;
 
 		input_report_abs(input, ABS_MT_TRACKING_ID, id);
 		input_report_abs(input, ABS_MT_TOUCH_MAJOR, tdata[3]);
@@ -202,9 +202,8 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 		input_report_abs(input, ABS_MT_POSITION_X, x);
 		input_report_abs(input, ABS_MT_POSITION_Y, y);
 
-		if (report_undeciphered) {
+		if (report_undeciphered)
 			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
-		}
 
 		input_mt_sync(input);
 	}
@@ -291,62 +290,41 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
 	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);
+	__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(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);
+	__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);
+		__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;
-
+		__set_bit(EV_ABS, input->evbit);
+
+		input_set_abs_params(input, ABS_MT_TRACKING_ID, 0, 15, 0, 0);
+		input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 4, 0);
+		input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 4, 0);
+		input_set_abs_params(input, ABS_MT_ORIENTATION, -32, 31, 1, 0);
+		input_set_abs_params(input, ABS_MT_POSITION_X, -1100, 1358,
+				4, 0);
 		/* 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;
+		input_set_abs_params(input, ABS_MT_POSITION_Y, -1589, 2047,
+				4, 0);
 	}
 
 	if (report_undeciphered) {
-		set_bit(EV_MSC, input->evbit);
-		set_bit(MSC_RAW, input->mscbit);
+		__set_bit(EV_MSC, input->evbit);
+		__set_bit(MSC_RAW, input->mscbit);
 	}
 }
 
@@ -385,7 +363,7 @@ static int magicmouse_probe(struct hid_device *hdev,
 	if (!report) {
 		dev_err(&hdev->dev, "unable to register touch report\n");
 		ret = -ENOMEM;
-		goto err_free;
+		goto err_stop_hw;
 	}
 	report->size = 6;
 
@@ -394,35 +372,37 @@ static int magicmouse_probe(struct hid_device *hdev,
 	if (ret != sizeof(feature_1)) {
 		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
 				ret);
-		goto err_free;
+		goto err_stop_hw;
 	}
 	ret = hdev->hid_output_raw_report(hdev, feature_2,
 			sizeof(feature_2), HID_FEATURE_REPORT);
 	if (ret != sizeof(feature_2)) {
 		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
 				ret);
-		goto err_free;
+		goto err_stop_hw;
 	}
 
 	input = input_allocate_device();
 	if (!input) {
 		dev_err(&hdev->dev, "can't alloc input device\n");
 		ret = -ENOMEM;
-		goto err_free;
+		goto err_stop_hw;
 	}
 	magicmouse_setup_input(input, hdev);
 
 	ret = input_register_device(input);
 	if (ret) {
 		dev_err(&hdev->dev, "input device registration failed\n");
-		goto err_both;
+		goto err_input;
 	}
 	msc->input = input;
 
 	return 0;
- err_both:
+err_input:
 	input_free_device(input);
- err_free:
+err_stop_hw:
+	hid_hw_stop(hdev);
+err_free:
 	kfree(msc);
 	return ret;
 }
-- 
1.6.5.6

Re: [PATCH] hid-magicmouse: Coding style and probe failure fixes.

[Dmitry Torokhov]

On Thu, Feb 11, 2010 at 12:32:57AM -0500, Michael Poole wrote:
> From 04b395dbbd1ad2b836188e6f125940ae8fac6925 Mon Sep 17 00:00:00 2001
> 
> As suggested by Dmitry Torokhov on 10 Feb: Use proper values
> to initialize bool configuration variables, tabs rather than
> spaces, no braces for one-line else clause, __set_bit() when
> the operation doesn't have to be atomic, input_set_abs_params()
> rather than writing the fields directly, and call hid_hw_stop()
> when appropriate to handle failures in the probe.
> 
> Signed-off-by: Michael Poole <mdpoole@troilus.org>
> ---
> Dmitry and Jiri,
> 
> I haven't had a chance to run-test these changes yet -- hid/for-next
> causes corrupt X display on my laptop, whereas v2.6.33-rc6 and -rc7 are
> fine; I'm still bisecting to figure out the cause -- but this patch is
> not complicated.  (It does compile.)
> 
> I left the buffers for hdev->hid_output_raw_report() on the stack
> because the Bluetooth HIDP code memcpy's the contents into a freshly
> allocated skb.
> 

Ah, OK, I missed the fact that itis BT only device.

The resul looks much better now, thank you for making the changes.

-- 
Dmitry

Re: [PATCH] hid-magicmouse: Coding style and probe failure fixes.

[Dmitry Torokhov]

On Thu, Feb 11, 2010 at 12:32:57AM -0500, Michael Poole wrote:
> From 04b395dbbd1ad2b836188e6f125940ae8fac6925 Mon Sep 17 00:00:00 2001
> 
> As suggested by Dmitry Torokhov on 10 Feb: Use proper values
> to initialize bool configuration variables, tabs rather than
> spaces, no braces for one-line else clause, __set_bit() when
> the operation doesn't have to be atomic, input_set_abs_params()
> rather than writing the fields directly, and call hid_hw_stop()
> when appropriate to handle failures in the probe.
> 
> Signed-off-by: Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.org>
> ---
> Dmitry and Jiri,
> 
> I haven't had a chance to run-test these changes yet -- hid/for-next
> causes corrupt X display on my laptop, whereas v2.6.33-rc6 and -rc7 are
> fine; I'm still bisecting to figure out the cause -- but this patch is
> not complicated.  (It does compile.)
> 
> I left the buffers for hdev->hid_output_raw_report() on the stack
> because the Bluetooth HIDP code memcpy's the contents into a freshly
> allocated skb.
> 

Ah, OK, I missed the fact that itis BT only device.

The resul looks much better now, thank you for making the changes.

-- 
Dmitry

Re: [PATCH] hid-magicmouse: Coding style and probe failure fixes.

[Jiri Kosina]

On Thu, 11 Feb 2010, Michael Poole wrote:

> I haven't had a chance to run-test these changes yet -- hid/for-next
> causes corrupt X display on my laptop, whereas v2.6.33-rc6 and -rc7 are
> fine; 

That's indeed quite strange. I'd be curious to see the result of the 
bisection, thanks a lot for doing this.

I have applied your patch to the branch containing your driver.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH] hid-magicmouse: Coding style and probe failure fixes.

[Michael Poole]

Jiri Kosina writes:

> On Thu, 11 Feb 2010, Michael Poole wrote:
>
>> I haven't had a chance to run-test these changes yet -- hid/for-next
>> causes corrupt X display on my laptop, whereas v2.6.33-rc6 and -rc7 are
>> fine; 
>
> That's indeed quite strange. I'd be curious to see the result of the 
> bisection, thanks a lot for doing this.

The problem was introduced by 859ddf0 and reverted in 6f14a66 (both only
touching lib/idr.c).  You just happened to merge from master during an
unfortunate window :)

Cherry-picking the revert (6f14a66) on top of commit 093657 (details
shown below for reference) yields a working kernel with a working Magic
Mouse driver.  I expect that merging the rest of master would also work.

commit 09365737da8b3af76abd9d811d435d3ce379903a
Merge: 1b97e37 71b38bd
Author: Jiri Kosina <jkosina@suse.cz>
Date:   Thu Feb 11 11:22:52 2010 +0100

    Merge branch 'apple_magic_mouse' into for-next

Michael Poole

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Ed Tomlinson]

Hi,

When I apply this to head, I get:

drivers/hid/hid-magicmouse.c: In function 'magicmouse_probe':                                                         
drivers/hid/hid-magicmouse.c:393: error: too many arguments to function 'hdev->hid_output_raw_report'                 
drivers/hid/hid-magicmouse.c:400: error: too many arguments to function 'hdev->hid_output_raw_report'                 

I only need the second patch - the first seems to be in tree.

Any ideas as to what I am missing?

TIA
Ed

On Tuesday 09 February 2010 08:13:08 Michael Poole wrote:
> From da3e2b0330fccd584ad79495853e638e9652155b Mon Sep 17 00:00:00 2001
> From: Michael Poole <mdpoole@troilus.org>
> Date: Sat, 6 Feb 2010 12:24:36 -0500
> Subject: Add a device driver for the Apple Magic Mouse.
> 
> 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 |  469 ++++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 482 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/hid/hid-magicmouse.c
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 24d90ea..ba14ec8 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 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..f94b3e4
> --- /dev/null
> +++ b/drivers/hid/hid-magicmouse.c
> @@ -0,0 +1,469 @@
> +/*
> + *   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");
> +
> +#define TOUCH_REPORT_ID   0x29
> +/* These definitions are not precise, but they're close enough.  (Bits
> + * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
> + * to be some kind of bit mask -- 0x20 may be a near-field reading,
> + * and 0x40 is actual contact, and 0x10 may be a start/stop or change
> + * indication.)
> + */
> +#define TOUCH_STATE_MASK  0xf0
> +#define TOUCH_STATE_NONE  0x00
> +#define TOUCH_STATE_START 0x30
> +#define TOUCH_STATE_DRAG  0x40
> +
> +/**
> + * struct magicmouse_sc - Tracks Magic Mouse-specific data.
> + * @input: Input device through which we report events.
> + * @quirks: Currently unused.
> + * @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.
> + * @scroll_accel: Number of consecutive scroll motions.
> + * @scroll_jiffies: Time of last scroll motion.
> + * @touches: Most recent data for a touch, indexed by tracking ID.
> + * @tracking_ids: Mapping of current touch input data to @touches.
> + */
> +struct magicmouse_sc {
> +	struct input_dev *input;
> +	unsigned long quirks;
> +
> +	int last_timestamp;
> +	int delta_time;
> +	int ntouches;
> +	int scroll_accel;
> +	unsigned long scroll_jiffies;
> +
> +	struct {
> +		short x;
> +		short y;
> +		short scroll_y;
> +		u8 size;
> +	} touches[16];
> +	int tracking_ids[16];
> +};
> +
> +static int magicmouse_firm_touch(struct magicmouse_sc *msc)
> +{
> +	int touch = -1;
> +	int ii;
> +
> +	/* If there is only one "firm" touch, set touch to its
> +	 * tracking ID.
> +	 */
> +	for (ii = 0; ii < msc->ntouches; ii++) {
> +		int idx = msc->tracking_ids[ii];
> +		if (msc->touches[idx].size < 8) {
> +			/* Ignore this touch. */
> +		} else if (touch >= 0) {
> +			touch = -1;
> +			break;
> +		} else {
> +			touch = idx;
> +		}
> +	}
> +
> +	return touch;
> +}
> +
> +static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
> +{
> +        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
> +                test_bit(BTN_RIGHT, msc->input->key) << 1 |
> +                test_bit(BTN_MIDDLE, msc->input->key) << 2;
> +
> +	if (emulate_3button) {
> +		int id;
> +
> +		/* If some button was pressed before, keep it held
> +		 * down.  Otherwise, if there's exactly one firm
> +		 * touch, use that to override the mouse's guess.
> +		 */
> +		if (state == 0) {
> +			/* The button was released. */
> +		} else if (last_state != 0) {
> +			state = last_state;
> +		} else if ((id = magicmouse_firm_touch(msc)) >= 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;
> +		} /* else: we keep the mouse's guess */
> +
> +		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);
> +
> +	if (state != last_state)
> +		msc->scroll_accel = 0;
> +}
> +
> +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;
> +	int 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 and other fields. */
> +	msc->tracking_ids[raw_id] = id;
> +	msc->touches[id].x = x;
> +	msc->touches[id].y = y;
> +	msc->touches[id].size = misc & 63;
> +
> +	/* If requested, emulate a scroll wheel by detecting small
> +	 * vertical touch motions along the middle of the mouse.
> +	 */
> +	if (emulate_scroll_wheel &&
> +	    middle_button_start < x && x < middle_button_stop) {
> +		static const int accel_profile[] = {
> +			256, 228, 192, 160, 128, 96, 64, 32,
> +		};
> +		unsigned long now = jiffies;
> +		int step = msc->touches[id].scroll_y - y;
> +
> +		/* Reset acceleration after half a second. */
> +		if (time_after(now, msc->scroll_jiffies + HZ / 2))
> +			msc->scroll_accel = 0;
> +
> +		/* Calculate and apply the scroll motion. */
> +		switch (tdata[7] & TOUCH_STATE_MASK) {
> +		case TOUCH_STATE_START:
> +			msc->touches[id].scroll_y = y;
> +                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
> +						ARRAY_SIZE(accel_profile) - 1);
> +			break;
> +		case TOUCH_STATE_DRAG:
> +			step = step / accel_profile[msc->scroll_accel];
> +			if (step != 0) {
> +				msc->touches[id].scroll_y = y;
> +				msc->scroll_jiffies = now;
> +				input_report_rel(input, REL_WHEEL, step);
> +			}
> +			break;
> +		}
> +	}
> +
> +	/* Generate the input events for this touch. */
> +	if (report_touches) {
> +                int orientation = (misc >> 10) - 32;
> +
> +		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, orientation);
> +		input_report_abs(input, ABS_MT_POSITION_X, x);
> +		input_report_abs(input, ABS_MT_POSITION_Y, y);
> +
> +		if (report_undeciphered) {
> +			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
> +		}
> +
> +		input_mt_sync(input);
> +	}
> +}
> +
> +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 x, y, ts, ii, clicks;
> +
> +	switch (data[0]) {
> +	case 0x10:
> +		if (size != 6)
> +			return 0;
> +		x = (__s16)(data[2] | data[3] << 8);
> +		y = (__s16)(data[4] | data[5] << 8);
> +		clicks = data[1];
> +		break;
> +	case TOUCH_REPORT_ID:
> +		/* 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.
> +		 */
> +		x = (signed char)data[1];
> +		y = (signed char)data[2];
> +		clicks = data[3];
> +		break;
> +	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;
> +	}
> +
> +	magicmouse_emit_buttons(msc, clicks & 3);
> +	input_report_rel(input, REL_X, x);
> +	input_report_rel(input, REL_Y, y);
> +	input_sync(input);
> +	return 1;
> +}
> +
> +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, TOUCH_REPORT_ID);
> +	if (!report) {
> +		dev_err(&hdev->dev, "unable to register touch report\n");
> +		ret = -ENOMEM;
> +		goto err_free;
> +	}
> +	report->size = 6;
> +
> +	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
> +			HID_FEATURE_REPORT);
> +	if (ret != sizeof(feature_1)) {
> +		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
> +				ret);
> +		goto err_free;
> +	}
> +	ret = hdev->hid_output_raw_report(hdev, feature_2,
> +			sizeof(feature_2), HID_FEATURE_REPORT);
> +	if (ret != sizeof(feature_2)) {
> +		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
> +				ret);
> +		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");
> 

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Ed Tomlinson]

Hi,

When I apply this to head, I get:

drivers/hid/hid-magicmouse.c: In function 'magicmouse_probe':                                                         
drivers/hid/hid-magicmouse.c:393: error: too many arguments to function 'hdev->hid_output_raw_report'                 
drivers/hid/hid-magicmouse.c:400: error: too many arguments to function 'hdev->hid_output_raw_report'                 

I only need the second patch - the first seems to be in tree.

Any ideas as to what I am missing?

TIA
Ed

On Tuesday 09 February 2010 08:13:08 Michael Poole wrote:
> From da3e2b0330fccd584ad79495853e638e9652155b Mon Sep 17 00:00:00 2001
> From: Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.org>
> Date: Sat, 6 Feb 2010 12:24:36 -0500
> Subject: Add a device driver for the Apple Magic Mouse.
> 
> Signed-off-by: Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.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 |  469 ++++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 482 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/hid/hid-magicmouse.c
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 24d90ea..ba14ec8 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 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..f94b3e4
> --- /dev/null
> +++ b/drivers/hid/hid-magicmouse.c
> @@ -0,0 +1,469 @@
> +/*
> + *   Apple "Magic" Wireless Mouse driver
> + *
> + *   Copyright (c) 2010 Michael Poole <mdpoole-IZmAEv5cUt1AfugRpC6u6w@public.gmane.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");
> +
> +#define TOUCH_REPORT_ID   0x29
> +/* These definitions are not precise, but they're close enough.  (Bits
> + * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
> + * to be some kind of bit mask -- 0x20 may be a near-field reading,
> + * and 0x40 is actual contact, and 0x10 may be a start/stop or change
> + * indication.)
> + */
> +#define TOUCH_STATE_MASK  0xf0
> +#define TOUCH_STATE_NONE  0x00
> +#define TOUCH_STATE_START 0x30
> +#define TOUCH_STATE_DRAG  0x40
> +
> +/**
> + * struct magicmouse_sc - Tracks Magic Mouse-specific data.
> + * @input: Input device through which we report events.
> + * @quirks: Currently unused.
> + * @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.
> + * @scroll_accel: Number of consecutive scroll motions.
> + * @scroll_jiffies: Time of last scroll motion.
> + * @touches: Most recent data for a touch, indexed by tracking ID.
> + * @tracking_ids: Mapping of current touch input data to @touches.
> + */
> +struct magicmouse_sc {
> +	struct input_dev *input;
> +	unsigned long quirks;
> +
> +	int last_timestamp;
> +	int delta_time;
> +	int ntouches;
> +	int scroll_accel;
> +	unsigned long scroll_jiffies;
> +
> +	struct {
> +		short x;
> +		short y;
> +		short scroll_y;
> +		u8 size;
> +	} touches[16];
> +	int tracking_ids[16];
> +};
> +
> +static int magicmouse_firm_touch(struct magicmouse_sc *msc)
> +{
> +	int touch = -1;
> +	int ii;
> +
> +	/* If there is only one "firm" touch, set touch to its
> +	 * tracking ID.
> +	 */
> +	for (ii = 0; ii < msc->ntouches; ii++) {
> +		int idx = msc->tracking_ids[ii];
> +		if (msc->touches[idx].size < 8) {
> +			/* Ignore this touch. */
> +		} else if (touch >= 0) {
> +			touch = -1;
> +			break;
> +		} else {
> +			touch = idx;
> +		}
> +	}
> +
> +	return touch;
> +}
> +
> +static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
> +{
> +        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
> +                test_bit(BTN_RIGHT, msc->input->key) << 1 |
> +                test_bit(BTN_MIDDLE, msc->input->key) << 2;
> +
> +	if (emulate_3button) {
> +		int id;
> +
> +		/* If some button was pressed before, keep it held
> +		 * down.  Otherwise, if there's exactly one firm
> +		 * touch, use that to override the mouse's guess.
> +		 */
> +		if (state == 0) {
> +			/* The button was released. */
> +		} else if (last_state != 0) {
> +			state = last_state;
> +		} else if ((id = magicmouse_firm_touch(msc)) >= 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;
> +		} /* else: we keep the mouse's guess */
> +
> +		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);
> +
> +	if (state != last_state)
> +		msc->scroll_accel = 0;
> +}
> +
> +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;
> +	int 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 and other fields. */
> +	msc->tracking_ids[raw_id] = id;
> +	msc->touches[id].x = x;
> +	msc->touches[id].y = y;
> +	msc->touches[id].size = misc & 63;
> +
> +	/* If requested, emulate a scroll wheel by detecting small
> +	 * vertical touch motions along the middle of the mouse.
> +	 */
> +	if (emulate_scroll_wheel &&
> +	    middle_button_start < x && x < middle_button_stop) {
> +		static const int accel_profile[] = {
> +			256, 228, 192, 160, 128, 96, 64, 32,
> +		};
> +		unsigned long now = jiffies;
> +		int step = msc->touches[id].scroll_y - y;
> +
> +		/* Reset acceleration after half a second. */
> +		if (time_after(now, msc->scroll_jiffies + HZ / 2))
> +			msc->scroll_accel = 0;
> +
> +		/* Calculate and apply the scroll motion. */
> +		switch (tdata[7] & TOUCH_STATE_MASK) {
> +		case TOUCH_STATE_START:
> +			msc->touches[id].scroll_y = y;
> +                        msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
> +						ARRAY_SIZE(accel_profile) - 1);
> +			break;
> +		case TOUCH_STATE_DRAG:
> +			step = step / accel_profile[msc->scroll_accel];
> +			if (step != 0) {
> +				msc->touches[id].scroll_y = y;
> +				msc->scroll_jiffies = now;
> +				input_report_rel(input, REL_WHEEL, step);
> +			}
> +			break;
> +		}
> +	}
> +
> +	/* Generate the input events for this touch. */
> +	if (report_touches) {
> +                int orientation = (misc >> 10) - 32;
> +
> +		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, orientation);
> +		input_report_abs(input, ABS_MT_POSITION_X, x);
> +		input_report_abs(input, ABS_MT_POSITION_Y, y);
> +
> +		if (report_undeciphered) {
> +			input_event(input, EV_MSC, MSC_RAW, tdata[7]);
> +		}
> +
> +		input_mt_sync(input);
> +	}
> +}
> +
> +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 x, y, ts, ii, clicks;
> +
> +	switch (data[0]) {
> +	case 0x10:
> +		if (size != 6)
> +			return 0;
> +		x = (__s16)(data[2] | data[3] << 8);
> +		y = (__s16)(data[4] | data[5] << 8);
> +		clicks = data[1];
> +		break;
> +	case TOUCH_REPORT_ID:
> +		/* 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.
> +		 */
> +		x = (signed char)data[1];
> +		y = (signed char)data[2];
> +		clicks = data[3];
> +		break;
> +	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;
> +	}
> +
> +	magicmouse_emit_buttons(msc, clicks & 3);
> +	input_report_rel(input, REL_X, x);
> +	input_report_rel(input, REL_Y, y);
> +	input_sync(input);
> +	return 1;
> +}
> +
> +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, TOUCH_REPORT_ID);
> +	if (!report) {
> +		dev_err(&hdev->dev, "unable to register touch report\n");
> +		ret = -ENOMEM;
> +		goto err_free;
> +	}
> +	report->size = 6;
> +
> +	ret = hdev->hid_output_raw_report(hdev, feature_1, sizeof(feature_1),
> +			HID_FEATURE_REPORT);
> +	if (ret != sizeof(feature_1)) {
> +		dev_err(&hdev->dev, "unable to request touch data (1:%d)\n",
> +				ret);
> +		goto err_free;
> +	}
> +	ret = hdev->hid_output_raw_report(hdev, feature_2,
> +			sizeof(feature_2), HID_FEATURE_REPORT);
> +	if (ret != sizeof(feature_2)) {
> +		dev_err(&hdev->dev, "unable to request touch data (2:%d)\n",
> +				ret);
> +		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");
> 

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

Ed Tomlinson writes:

> Hi,
>
> When I apply this to head, I get:
>
> drivers/hid/hid-magicmouse.c: In function 'magicmouse_probe':                                                         
> drivers/hid/hid-magicmouse.c:393: error: too many arguments to function 'hdev->hid_output_raw_report'                 
> drivers/hid/hid-magicmouse.c:400: error: too many arguments to function 'hdev->hid_output_raw_report'                 
>
> I only need the second patch - the first seems to be in tree.
>
> Any ideas as to what I am missing?
>
> TIA
> Ed

You're missing the patch that makes hid_output_raw_report() more generic.
It is in the HID tree[1] as commit d4bfa033.

[1]- http://git.kernel.org/?p=linux/kernel/git/jikos/hid.git

Michael Poole

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

Ed Tomlinson writes:

> Hi,
>
> When I apply this to head, I get:
>
> drivers/hid/hid-magicmouse.c: In function 'magicmouse_probe':                                                         
> drivers/hid/hid-magicmouse.c:393: error: too many arguments to function 'hdev->hid_output_raw_report'                 
> drivers/hid/hid-magicmouse.c:400: error: too many arguments to function 'hdev->hid_output_raw_report'                 
>
> I only need the second patch - the first seems to be in tree.
>
> Any ideas as to what I am missing?
>
> TIA
> Ed

You're missing the patch that makes hid_output_raw_report() more generic.
It is in the HID tree[1] as commit d4bfa033.

[1]- http://git.kernel.org/?p=linux/kernel/git/jikos/hid.git

Michael Poole

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse.

[Michael Poole]

Ed Tomlinson writes:

> Hi,
>
> When I apply this to head, I get:
>
> drivers/hid/hid-magicmouse.c: In function 'magicmouse_probe':                                                         
> drivers/hid/hid-magicmouse.c:393: error: too many arguments to function 'hdev->hid_output_raw_report'                 
> drivers/hid/hid-magicmouse.c:400: error: too many arguments to function 'hdev->hid_output_raw_report'                 
>
> I only need the second patch - the first seems to be in tree.
>
> Any ideas as to what I am missing?
>
> TIA
> Ed

You're missing the patch that makes hid_output_raw_report() more generic.
It is in the HID tree[1] as commit d4bfa033.

[1]- http://git.kernel.org/?p=linux/kernel/git/jikos/hid.git

Michael Poole

Re: [PATCH 2/2] Add a device driver for the Apple Magic Mouse (2.6.32.8)

[Ed Tomlinson]

On Wednesday 10 February 2010 22:20:13 Michael Poole wrote:
> Ed Tomlinson writes:
> 
> > Hi,
> >
> > When I apply this to head, I get:
> >
> > drivers/hid/hid-magicmouse.c: In function 'magicmouse_probe':                                                         
> > drivers/hid/hid-magicmouse.c:393: error: too many arguments to function 'hdev->hid_output_raw_report'                 
> > drivers/hid/hid-magicmouse.c:400: error: too many arguments to function 'hdev->hid_output_raw_report'                 
> >
> > I only need the second patch - the first seems to be in tree.
> >
> > Any ideas as to what I am missing?
> >
> > TIA
> > Ed
> 
> You're missing the patch that makes hid_output_raw_report() more generic.
> It is in the HID tree[1] as commit d4bfa033.
> 
> [1]- http://git.kernel.org/?p=linux/kernel/git/jikos/hid.git

Ok.  With this I have a patchset that applies to 2.6.32.8.  If anyone wants it
just email.  

Of course, Michael's cleanups came just after I booted with the new kernel.  I'll
apply it and update & post my changes that allow both x and y scrolling and almost 
work for a few multitouch gestures.

Ed

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse

[Justin P. Mattock]

On 02/09/10 05:10, Michael Poole wrote:
> I think this patch is ready for real review.  The Magic Mouse requires
> that a driver send an unlock Report(Feature) command, similar to the
> Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> Input Report that isn't published in the input Report descriptor that
> contains touch data (and usually overrides the normal motion and click
> Report).
>
> Because the mouse has only one switch and no scroll wheel, the driver
> (under control of parameters) emulates a middle button and scroll wheel.
> User space could also ignore and/or re-synthesize those events based on
> the reported events.
>
> The first patch exports hid_register_report() so the driver can turn on
> the multitouch report.  The second patch adds the device ID and the
> driver.  Some user-space tools to talk to the mouse directly (that is,
> when it is not associated with the host's HIDP stack) are at
> http://github.com/entrope/linux-magicmouse .
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>


First, is I made a mistake with the procedure(early post) i.g.
sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48
forgot to add yes at the end.
(so rebooting works and so forth).

As to this module I pulled the latest mainstream
added:
http://lkml.org/lkml/2010/1/29/146
plus the two other patches you had submitted with this thread and
everything compiled good.

Glad to see the mouse is working with these patches(thank you vary much 
gentlemen).

I can scroll up and down(need to get used to this).
copy/past works
right/left click works.
(need to figure out forward/reverse with firefox probably).

suspend works. I'm getting a resumbit urb, but that's been there
prior to this module. Although there was a moment after wakeup
I turned off the mouse, then reconnecting didnt, but then on another 
go(reboot)it worked(maybe hit some odd thing).

Other than not seeing any menu entry under hid
with make menuconfig, I would have to say vary nice
job with this, all functions I need to function are
there(scroll,right/left click, copy/past).

nice job, and thanks for this..
(without this I would of had a non
functional magic mouse).

Justin P. Mattock

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse

[Justin P. Mattock]

On 02/09/10 05:10, Michael Poole wrote:
> I think this patch is ready for real review.  The Magic Mouse requires
> that a driver send an unlock Report(Feature) command, similar to the
> Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> Input Report that isn't published in the input Report descriptor that
> contains touch data (and usually overrides the normal motion and click
> Report).
>
> Because the mouse has only one switch and no scroll wheel, the driver
> (under control of parameters) emulates a middle button and scroll wheel.
> User space could also ignore and/or re-synthesize those events based on
> the reported events.
>
> The first patch exports hid_register_report() so the driver can turn on
> the multitouch report.  The second patch adds the device ID and the
> driver.  Some user-space tools to talk to the mouse directly (that is,
> when it is not associated with the host's HIDP stack) are at
> http://github.com/entrope/linux-magicmouse .
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>


First, is I made a mistake with the procedure(early post) i.g.
sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48
forgot to add yes at the end.
(so rebooting works and so forth).

As to this module I pulled the latest mainstream
added:
http://lkml.org/lkml/2010/1/29/146
plus the two other patches you had submitted with this thread and
everything compiled good.

Glad to see the mouse is working with these patches(thank you vary much 
gentlemen).

I can scroll up and down(need to get used to this).
copy/past works
right/left click works.
(need to figure out forward/reverse with firefox probably).

suspend works. I'm getting a resumbit urb, but that's been there
prior to this module. Although there was a moment after wakeup
I turned off the mouse, then reconnecting didnt, but then on another 
go(reboot)it worked(maybe hit some odd thing).

Other than not seeing any menu entry under hid
with make menuconfig, I would have to say vary nice
job with this, all functions I need to function are
there(scroll,right/left click, copy/past).

nice job, and thanks for this..
(without this I would of had a non
functional magic mouse).

Justin P. Mattock

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse

[Jiri Kosina]

On Tue, 9 Feb 2010, Michael Poole wrote:

> I think this patch is ready for real review.  The Magic Mouse requires
> that a driver send an unlock Report(Feature) command, similar to the
> Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> Input Report that isn't published in the input Report descriptor that
> contains touch data (and usually overrides the normal motion and click
> Report).
> 
> Because the mouse has only one switch and no scroll wheel, the driver
> (under control of parameters) emulates a middle button and scroll wheel.
> User space could also ignore and/or re-synthesize those events based on
> the reported events.
> 
> The first patch exports hid_register_report() so the driver can turn on
> the multitouch report.  The second patch adds the device ID and the
> driver.  Some user-space tools to talk to the mouse directly (that is,
> when it is not associated with the host's HIDP stack) are at
> http://github.com/entrope/linux-magicmouse .

I have applied the driver into apple_magic_mouse branch and merged this 
branch into for-next, so it should appear in the upcoming linux-next.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse

[Jiri Kosina]

On Tue, 9 Feb 2010, Michael Poole wrote:

> I think this patch is ready for real review.  The Magic Mouse requires
> that a driver send an unlock Report(Feature) command, similar to the
> Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> Input Report that isn't published in the input Report descriptor that
> contains touch data (and usually overrides the normal motion and click
> Report).
> 
> Because the mouse has only one switch and no scroll wheel, the driver
> (under control of parameters) emulates a middle button and scroll wheel.
> User space could also ignore and/or re-synthesize those events based on
> the reported events.
> 
> The first patch exports hid_register_report() so the driver can turn on
> the multitouch report.  The second patch adds the device ID and the
> driver.  Some user-space tools to talk to the mouse directly (that is,
> when it is not associated with the host's HIDP stack) are at
> http://github.com/entrope/linux-magicmouse .

I have applied the driver into apple_magic_mouse branch and merged this 
branch into for-next, so it should appear in the upcoming linux-next.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> On Tue, 9 Feb 2010, Michael Poole wrote:
> 
> > I think this patch is ready for real review.  The Magic Mouse requires
> > that a driver send an unlock Report(Feature) command, similar to the
> > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > Input Report that isn't published in the input Report descriptor that
> > contains touch data (and usually overrides the normal motion and click
> > Report).
> > 
> > Because the mouse has only one switch and no scroll wheel, the driver
> > (under control of parameters) emulates a middle button and scroll wheel.
> > User space could also ignore and/or re-synthesize those events based on
> > the reported events.
> > 
> > The first patch exports hid_register_report() so the driver can turn on
> > the multitouch report.  The second patch adds the device ID and the
> > driver.  Some user-space tools to talk to the mouse directly (that is,
> > when it is not associated with the host's HIDP stack) are at
> > http://github.com/entrope/linux-magicmouse .
> 
> I have applied the driver into apple_magic_mouse branch and merged this 
> branch into for-next, so it should appear in the upcoming linux-next.

This driver (or the hid changes) can triggers an opps.  What I did was start X.  Turn on the magic mouse.  It connected on input7&8.  
Then I powered it off and on.  This time it conneced on input9&10.  Then I exited X and got the opps.  Note my X does not hotplug 
the magic mouse.  I've also included a trace of the udev events that generated the log below (if there was a remove after X stopped 
it would not be included).  To my eyes it looks like we leak an input device (there is not a remove event for input8).

[ 5955.908380] input: Apple Wireless Mouse as /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7
[ 5955.921165] magicmouse 0005:05AC:030D.0004: input,hidraw3: BLUETOOTH HID v0.84 Mouse [Apple Wireless Mouse] on 00:0A:3A:55:07:5A
[ 5955.934120] input: Apple Wireless Mouse as /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8
[ 6180.899332] input: Apple Wireless Mouse as /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input9
[ 6180.911914] magicmouse 0005:05AC:030D.0005: input,hidraw3: BLUETOOTH HID v0.84 Mouse [Apple Wireless Mouse] on 00:0A:3A:55:07:5A
[ 6180.923988] input: Apple Wireless Mouse as /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input10
[ 6391.991295] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
[ 6391.995818] IP: [<ffffffffa05a604f>] magicmouse_input_open+0x1f/0x30 [hid_magicmouse]
[ 6392.009801] PGD 16c3b6067 PUD 16b139067 PMD 0 
[ 6392.009801] Oops: 0000 [#1] PREEMPT SMP 
[ 6392.009801] last sysfs file: /sys/devices/pci0000:00/0000:00:18.3/temp1_input
[ 6392.009801] CPU 1 
[ 6392.009801] Pid: 2763, comm: gpm Not tainted 2.6.33-rc8-crc #106 M3A78-T/System Product Name
[ 6392.064520] RIP: 0010:[<ffffffffa05a604f>]  [<ffffffffa05a604f>] magicmouse_input_open+0x1f/0x30 [hid_magicmouse]
[ 6392.064520] RSP: 0018:ffff88016c2ddba8  EFLAGS: 00010282
[ 6392.064520] RAX: ffff88016dd90000 RBX: ffff88016bc9b000 RCX: 0000000000000001
[ 6392.107009] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88016dd90000
[ 6392.107009] RBP: ffff88016c2ddba8 R08: 2222222222222222 R09: 2222222222222222
[ 6392.107009] R10: 0000000000000000 R11: 0000000000000001 R12: ffff880133b5a810
[ 6392.107009] R13: ffff88016bc9b820 R14: ffff88016dd60150 R15: ffff88016dd600a8
[ 6392.107009] FS:  00007f5ee305b700(0000) GS:ffff880028280000(0000) knlGS:0000000000000000
[ 6392.107009] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 6392.107009] CR2: 0000000000000010 CR3: 000000016c3b7000 CR4: 00000000000006e0
[ 6392.107009] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 6392.107009] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 6392.107009] Process gpm (pid: 2763, threadinfo ffff88016c2dc000, task ffff88016dde0000)
[ 6392.107009] Stack:
[ 6392.107009]  ffff88016c2ddbe8 ffffffff814010e9 ffff88016dd60150 ffff88016dd600a8
[ 6392.107009] <0> ffff88016c2ddbe8 ffff880133b5a800 ffff880133b5a8d8 0000000000000000
[ 6392.107009] <0> ffff88016c2ddc18 ffffffff81404236 ffff88016c2ddc18 ffff880133b5a800
[ 6392.107009] Call Trace:
[ 6392.107009]  [<ffffffff814010e9>] input_open_device+0x89/0xb0
[ 6392.107009]  [<ffffffff81404236>] mousedev_open_device+0x76/0x100
[ 6392.107009]  [<ffffffff814042a9>] mousedev_open_device+0xe9/0x100
[ 6392.107009]  [<ffffffff8140523f>] mousedev_open+0x19f/0x260
[ 6392.107009]  [<ffffffff814bc243>] ? _lock_kernel+0x143/0x1e0
[ 6392.107009]  [<ffffffff81402ba7>] input_open_file+0x227/0x410
[ 6392.107009]  [<ffffffff814bf981>] ? sub_preempt_count+0x51/0x60
[ 6392.107009]  [<ffffffff8112384d>] chrdev_open+0x17d/0x320
[ 6392.107009]  [<ffffffff814bbb7c>] ? _raw_spin_unlock+0x5c/0x70
[ 6392.107009]  [<ffffffff8111d358>] __dentry_open+0x1a8/0x400
[ 6392.107009]  [<ffffffff811236d0>] ? chrdev_open+0x0/0x320
[ 6392.107009]  [<ffffffff8111d6b4>] nameidata_to_filp+0x54/0x70
[ 6392.107009]  [<ffffffff8112e7f1>] do_filp_open+0x841/0xc00
[ 6392.107009]  [<ffffffff814bf981>] ? sub_preempt_count+0x51/0x60
[ 6392.107009]  [<ffffffff814bbb7c>] ? _raw_spin_unlock+0x5c/0x70
[ 6392.107009]  [<ffffffff81002b0c>] ? sysret_check+0x27/0x62
[ 6392.107009]  [<ffffffff8111e954>] do_sys_open+0xa4/0x180
[ 6392.107009]  [<ffffffff8111ea70>] sys_open+0x20/0x30
[ 6392.107009]  [<ffffffff81002adb>] system_call_fastpath+0x16/0x1b
[ 6392.107009] Code: 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 0f 1f 44 00 00 48 81 c7 a0 08 00 00 e8 3b f0 de e0 48 8b 90 38 1b 00 00 48 89 c7 <ff> 52 10 c9 c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 
[ 6392.107009] RIP  [<ffffffffa05a604f>] magicmouse_input_open+0x1f/0x30 [hid_magicmouse]
[ 6392.107009]  RSP <ffff88016c2ddba8>
[ 6392.107009] CR2: 0000000000000010
[ 6392.107321] ---[ end trace c83e80c68826df09 ]---

grover ~ # udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[1266085238.085802] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41 (bluetooth)
UDEV  [1266085238.113475] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41 (bluetooth)
KERNEL[1266085238.412016] add      /module/hidp (module)
UDEV  [1266085238.412247] add      /module/hidp (module)
KERNEL[1266085238.418193] add      /bus/hid/drivers/generic-bluetooth (drivers)
UDEV  [1266085238.418365] add      /bus/hid/drivers/generic-bluetooth (drivers)
KERNEL[1266085238.418507] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004 (hid)
KERNEL[1266085238.460711] add      /module/hid_magicmouse (module)
UDEV  [1266085238.460906] add      /module/hid_magicmouse (module)
KERNEL[1266085238.460977] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7 (input)
UDEV  [1266085238.462772] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7 (input)
KERNEL[1266085238.473232] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/mouse1 (input)
KERNEL[1266085238.473323] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/event7 (input)
KERNEL[1266085238.473662] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004/hidraw/hidraw3 (hidraw)
UDEV  [1266085238.479691] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/event7 (input)
KERNEL[1266085238.486090] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8 (input)
UDEV  [1266085238.488291] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/mouse1 (input)
UDEV  [1266085238.493195] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8 (input)
KERNEL[1266085238.498954] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8/mouse2 (input)
KERNEL[1266085238.499066] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8/event8 (input)
KERNEL[1266085238.499154] add      /bus/hid/drivers/magicmouse (drivers)
UDEV  [1266085238.499624] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004 (hid)
UDEV  [1266085238.501108] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004/hidraw/hidraw3 (hidraw)
UDEV  [1266085238.501311] add      /bus/hid/drivers/magicmouse (drivers)
UDEV  [1266085238.509221] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8/event8 (input)
UDEV  [1266085238.511459] add      /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input8/mouse2 (input)
KERNEL[1266085311.467279] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/mouse1 (input)
UDEV  [1266085311.468189] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/mouse1 (input)
KERNEL[1266085311.471961] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/event7 (input)
UDEV  [1266085311.472632] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7/event7 (input)
KERNEL[1266085311.475921] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7 (input)
KERNEL[1266085311.475985] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004/hidraw/hidraw3 (hidraw)
KERNEL[1266085311.476153] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004 (hid)
KERNEL[1266085311.476214] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41 (bluetooth)
UDEV  [1266085311.476397] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/input7 (input)
UDEV  [1266085311.476734] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004/hidraw/hidraw3 (hidraw)
UDEV  [1266085311.477000] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41/0005:05AC:030D.0004 (hid)
UDEV  [1266085311.503056] remove   /devices/pci0000:00/0000:00:13.2/usb7/7-4/7-4.4/7-4.4:1.0/bluetooth/hci0/hci0:41 (bluetooth)

Ideas?
Ed Tomlinson

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Dmitry Torokhov]

On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > On Tue, 9 Feb 2010, Michael Poole wrote:
> > 
> > > I think this patch is ready for real review.  The Magic Mouse requires
> > > that a driver send an unlock Report(Feature) command, similar to the
> > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > Input Report that isn't published in the input Report descriptor that
> > > contains touch data (and usually overrides the normal motion and click
> > > Report).
> > > 
> > > Because the mouse has only one switch and no scroll wheel, the driver
> > > (under control of parameters) emulates a middle button and scroll wheel.
> > > User space could also ignore and/or re-synthesize those events based on
> > > the reported events.
> > > 
> > > The first patch exports hid_register_report() so the driver can turn on
> > > the multitouch report.  The second patch adds the device ID and the
> > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > when it is not associated with the host's HIDP stack) are at
> > > http://github.com/entrope/linux-magicmouse .
> > 
> > I have applied the driver into apple_magic_mouse branch and merged this 
> > branch into for-next, so it should appear in the upcoming linux-next.
> 

> This driver (or the hid changes) can triggers an opps.  What I did was
> start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> powered it off and on.  This time it conneced on input9&10.  Then I
> exited X and got the opps.  Note my X does not hotplug the magic
> mouse.  I've also included a trace of the udev events that generated
> the log below (if there was a remove after X stopped it would not be
> included).  To my eyes it looks like we leak an input device (there is
> not a remove event for input8).
>

Indeed, we seem to be missing call to input_unregister_device() in
magicmouse_remove().

-- 
Dmitry

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote:
> On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > > On Tue, 9 Feb 2010, Michael Poole wrote:
> > > 
> > > > I think this patch is ready for real review.  The Magic Mouse requires
> > > > that a driver send an unlock Report(Feature) command, similar to the
> > > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > > Input Report that isn't published in the input Report descriptor that
> > > > contains touch data (and usually overrides the normal motion and click
> > > > Report).
> > > > 
> > > > Because the mouse has only one switch and no scroll wheel, the driver
> > > > (under control of parameters) emulates a middle button and scroll wheel.
> > > > User space could also ignore and/or re-synthesize those events based on
> > > > the reported events.
> > > > 
> > > > The first patch exports hid_register_report() so the driver can turn on
> > > > the multitouch report.  The second patch adds the device ID and the
> > > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > > when it is not associated with the host's HIDP stack) are at
> > > > http://github.com/entrope/linux-magicmouse .
> > > 
> > > I have applied the driver into apple_magic_mouse branch and merged this 
> > > branch into for-next, so it should appear in the upcoming linux-next.
> > 
> 
> > This driver (or the hid changes) can triggers an opps.  What I did was
> > start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> > powered it off and on.  This time it conneced on input9&10.  Then I
> > exited X and got the opps.  Note my X does not hotplug the magic
> > mouse.  I've also included a trace of the udev events that generated
> > the log below (if there was a remove after X stopped it would not be
> > included).  To my eyes it looks like we leak an input device (there is
> > not a remove event for input8).
> >
> 
> Indeed, we seem to be missing call to input_unregister_device() in
> magicmouse_remove().

How does this look?  With this udevadm shows input8 being removed and
there is no more opps.

----
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index f94b3e4..71a8669 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -429,8 +429,11 @@ static int magicmouse_probe(struct hid_device *hdev,
 
 static void magicmouse_remove(struct hid_device *hdev)
 {
+	struct magicmouse_sc *msc;
+	msc = hid_get_drvdata(hdev);
+	input_unregister_device(msc->input);
 	hid_hw_stop(hdev);
-	kfree(hid_get_drvdata(hdev));
+	kfree(msc);
 }
 
 static const struct hid_device_id magic_mice[] = {
----

Thanks
Ed

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote:
> On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > > On Tue, 9 Feb 2010, Michael Poole wrote:
> > > 
> > > > I think this patch is ready for real review.  The Magic Mouse requires
> > > > that a driver send an unlock Report(Feature) command, similar to the
> > > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > > Input Report that isn't published in the input Report descriptor that
> > > > contains touch data (and usually overrides the normal motion and click
> > > > Report).
> > > > 
> > > > Because the mouse has only one switch and no scroll wheel, the driver
> > > > (under control of parameters) emulates a middle button and scroll wheel.
> > > > User space could also ignore and/or re-synthesize those events based on
> > > > the reported events.
> > > > 
> > > > The first patch exports hid_register_report() so the driver can turn on
> > > > the multitouch report.  The second patch adds the device ID and the
> > > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > > when it is not associated with the host's HIDP stack) are at
> > > > http://github.com/entrope/linux-magicmouse .
> > > 
> > > I have applied the driver into apple_magic_mouse branch and merged this 
> > > branch into for-next, so it should appear in the upcoming linux-next.
> > 
> 
> > This driver (or the hid changes) can triggers an opps.  What I did was
> > start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> > powered it off and on.  This time it conneced on input9&10.  Then I
> > exited X and got the opps.  Note my X does not hotplug the magic
> > mouse.  I've also included a trace of the udev events that generated
> > the log below (if there was a remove after X stopped it would not be
> > included).  To my eyes it looks like we leak an input device (there is
> > not a remove event for input8).
> >
> 
> Indeed, we seem to be missing call to input_unregister_device() in
> magicmouse_remove().

How does this look?  With this udevadm shows input8 being removed and
there is no more opps.

----
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index f94b3e4..71a8669 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -429,8 +429,11 @@ static int magicmouse_probe(struct hid_device *hdev,
 
 static void magicmouse_remove(struct hid_device *hdev)
 {
+	struct magicmouse_sc *msc;
+	msc = hid_get_drvdata(hdev);
+	input_unregister_device(msc->input);
 	hid_hw_stop(hdev);
-	kfree(hid_get_drvdata(hdev));
+	kfree(msc);
 }
 
 static const struct hid_device_id magic_mice[] = {
----

Thanks
Ed

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Dmitry Torokhov]

On Sun, Feb 14, 2010 at 09:22:41AM -0500, Ed Tomlinson wrote:
> On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote:
> > On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> > > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > > > On Tue, 9 Feb 2010, Michael Poole wrote:
> > > > 
> > > > > I think this patch is ready for real review.  The Magic Mouse requires
> > > > > that a driver send an unlock Report(Feature) command, similar to the
> > > > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > > > Input Report that isn't published in the input Report descriptor that
> > > > > contains touch data (and usually overrides the normal motion and click
> > > > > Report).
> > > > > 
> > > > > Because the mouse has only one switch and no scroll wheel, the driver
> > > > > (under control of parameters) emulates a middle button and scroll wheel.
> > > > > User space could also ignore and/or re-synthesize those events based on
> > > > > the reported events.
> > > > > 
> > > > > The first patch exports hid_register_report() so the driver can turn on
> > > > > the multitouch report.  The second patch adds the device ID and the
> > > > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > > > when it is not associated with the host's HIDP stack) are at
> > > > > http://github.com/entrope/linux-magicmouse .
> > > > 
> > > > I have applied the driver into apple_magic_mouse branch and merged this 
> > > > branch into for-next, so it should appear in the upcoming linux-next.
> > > 
> > 
> > > This driver (or the hid changes) can triggers an opps.  What I did was
> > > start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> > > powered it off and on.  This time it conneced on input9&10.  Then I
> > > exited X and got the opps.  Note my X does not hotplug the magic
> > > mouse.  I've also included a trace of the udev events that generated
> > > the log below (if there was a remove after X stopped it would not be
> > > included).  To my eyes it looks like we leak an input device (there is
> > > not a remove event for input8).
> > >
> > 
> > Indeed, we seem to be missing call to input_unregister_device() in
> > magicmouse_remove().
> 
> How does this look?  With this udevadm shows input8 being removed and
> there is no more opps.

Almost... you need to do hid_hw_stop() first and only then unregister
input device, Otherwise if you unload the module while moving the mouse
it is likely to still oops.

Thanks.

-- 
Dmitry

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Monday 15 February 2010 02:11:46 Dmitry Torokhov wrote:
> On Sun, Feb 14, 2010 at 09:22:41AM -0500, Ed Tomlinson wrote:
> > On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote:
> > > On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> > > > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > > > > On Tue, 9 Feb 2010, Michael Poole wrote:
> > > > > 
> > > > > > I think this patch is ready for real review.  The Magic Mouse requires
> > > > > > that a driver send an unlock Report(Feature) command, similar to the
> > > > > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > > > > Input Report that isn't published in the input Report descriptor that
> > > > > > contains touch data (and usually overrides the normal motion and click
> > > > > > Report).
> > > > > > 
> > > > > > Because the mouse has only one switch and no scroll wheel, the driver
> > > > > > (under control of parameters) emulates a middle button and scroll wheel.
> > > > > > User space could also ignore and/or re-synthesize those events based on
> > > > > > the reported events.
> > > > > > 
> > > > > > The first patch exports hid_register_report() so the driver can turn on
> > > > > > the multitouch report.  The second patch adds the device ID and the
> > > > > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > > > > when it is not associated with the host's HIDP stack) are at
> > > > > > http://github.com/entrope/linux-magicmouse .
> > > > > 
> > > > > I have applied the driver into apple_magic_mouse branch and merged this 
> > > > > branch into for-next, so it should appear in the upcoming linux-next.
> > > > 
> > > 
> > > > This driver (or the hid changes) can triggers an opps.  What I did was
> > > > start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> > > > powered it off and on.  This time it conneced on input9&10.  Then I
> > > > exited X and got the opps.  Note my X does not hotplug the magic
> > > > mouse.  I've also included a trace of the udev events that generated
> > > > the log below (if there was a remove after X stopped it would not be
> > > > included).  To my eyes it looks like we leak an input device (there is
> > > > not a remove event for input8).
> > > >
> > > 
> > > Indeed, we seem to be missing call to input_unregister_device() in
> > > magicmouse_remove().
> > 
> > How does this look?  With this udevadm shows input8 being removed and
> > there is no more opps.
> 
> Almost... you need to do hid_hw_stop() first and only then unregister
> input device, Otherwise if you unload the module while moving the mouse
> it is likely to still oops.

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Monday 15 February 2010 02:11:46 Dmitry Torokhov wrote:
> On Sun, Feb 14, 2010 at 09:22:41AM -0500, Ed Tomlinson wrote:
> > On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote:
> > > On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> > > > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > > > > On Tue, 9 Feb 2010, Michael Poole wrote:
> > > > > 
> > > > > > I think this patch is ready for real review.  The Magic Mouse requires
> > > > > > that a driver send an unlock Report(Feature) command, similar to the
> > > > > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > > > > Input Report that isn't published in the input Report descriptor that
> > > > > > contains touch data (and usually overrides the normal motion and click
> > > > > > Report).
> > > > > > 
> > > > > > Because the mouse has only one switch and no scroll wheel, the driver
> > > > > > (under control of parameters) emulates a middle button and scroll wheel.
> > > > > > User space could also ignore and/or re-synthesize those events based on
> > > > > > the reported events.
> > > > > > 
> > > > > > The first patch exports hid_register_report() so the driver can turn on
> > > > > > the multitouch report.  The second patch adds the device ID and the
> > > > > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > > > > when it is not associated with the host's HIDP stack) are at
> > > > > > http://github.com/entrope/linux-magicmouse .
> > > > > 
> > > > > I have applied the driver into apple_magic_mouse branch and merged this 
> > > > > branch into for-next, so it should appear in the upcoming linux-next.
> > > > 
> > > 
> > > > This driver (or the hid changes) can triggers an opps.  What I did was
> > > > start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> > > > powered it off and on.  This time it conneced on input9&10.  Then I
> > > > exited X and got the opps.  Note my X does not hotplug the magic
> > > > mouse.  I've also included a trace of the udev events that generated
> > > > the log below (if there was a remove after X stopped it would not be
> > > > included).  To my eyes it looks like we leak an input device (there is
> > > > not a remove event for input8).
> > > >
> > > 
> > > Indeed, we seem to be missing call to input_unregister_device() in
> > > magicmouse_remove().
> > 
> > How does this look?  With this udevadm shows input8 being removed and
> > there is no more opps.
> 
> Almost... you need to do hid_hw_stop() first and only then unregister
> input device, Otherwise if you unload the module while moving the mouse
> it is likely to still oops.

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Monday 15 February 2010 02:11:46 Dmitry Torokhov wrote:
> On Sun, Feb 14, 2010 at 09:22:41AM -0500, Ed Tomlinson wrote:
> > On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote:
> > > On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote:
> > > > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote:
> > > > > On Tue, 9 Feb 2010, Michael Poole wrote:
> > > > > 
> > > > > > I think this patch is ready for real review.  The Magic Mouse requires
> > > > > > that a driver send an unlock Report(Feature) command, similar to the
> > > > > > Wacom wireless tablet and Sixaxis controller quirks.  This turns on an
> > > > > > Input Report that isn't published in the input Report descriptor that
> > > > > > contains touch data (and usually overrides the normal motion and click
> > > > > > Report).
> > > > > > 
> > > > > > Because the mouse has only one switch and no scroll wheel, the driver
> > > > > > (under control of parameters) emulates a middle button and scroll wheel.
> > > > > > User space could also ignore and/or re-synthesize those events based on
> > > > > > the reported events.
> > > > > > 
> > > > > > The first patch exports hid_register_report() so the driver can turn on
> > > > > > the multitouch report.  The second patch adds the device ID and the
> > > > > > driver.  Some user-space tools to talk to the mouse directly (that is,
> > > > > > when it is not associated with the host's HIDP stack) are at
> > > > > > http://github.com/entrope/linux-magicmouse .
> > > > > 
> > > > > I have applied the driver into apple_magic_mouse branch and merged this 
> > > > > branch into for-next, so it should appear in the upcoming linux-next.
> > > > 
> > > 
> > > > This driver (or the hid changes) can triggers an opps.  What I did was
> > > > start X.  Turn on the magic mouse.  It connected on input7&8.  Then I
> > > > powered it off and on.  This time it conneced on input9&10.  Then I
> > > > exited X and got the opps.  Note my X does not hotplug the magic
> > > > mouse.  I've also included a trace of the udev events that generated
> > > > the log below (if there was a remove after X stopped it would not be
> > > > included).  To my eyes it looks like we leak an input device (there is
> > > > not a remove event for input8).
> > > >
> > > 
> > > Indeed, we seem to be missing call to input_unregister_device() in
> > > magicmouse_remove().
> > 
> > How does this look?  With this udevadm shows input8 being removed and
> > there is no more opps.
> 
> Almost... you need to do hid_hw_stop() first and only then unregister
> input device, Otherwise if you unload the module while moving the mouse
> it is likely to still oops.

How about this?  It applies on top of yesterdays patch.

Ed

---
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 7d252d2..46fdeee 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -430,8 +430,8 @@ static void magicmouse_remove(struct hid_device *hdev)
 {
 	struct magicmouse_sc *msc;
 	msc = hid_get_drvdata(hdev);
-	input_unregister_device(msc->input);
 	hid_hw_stop(hdev);
+	input_unregister_device(msc->input);
 	kfree(msc);
 }
 

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Jiri Kosina]

On Mon, 15 Feb 2010, Ed Tomlinson wrote:

> > Almost... you need to do hid_hw_stop() first and only then unregister
> > input device, Otherwise if you unload the module while moving the mouse
> > it is likely to still oops.
> 
> How about this?  It applies on top of yesterdays patch.
> 
> Ed
> 
> ---
> diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
> index 7d252d2..46fdeee 100644
> --- a/drivers/hid/hid-magicmouse.c
> +++ b/drivers/hid/hid-magicmouse.c
> @@ -430,8 +430,8 @@ static void magicmouse_remove(struct hid_device *hdev)
>  {
>  	struct magicmouse_sc *msc;
>  	msc = hid_get_drvdata(hdev);
> -	input_unregister_device(msc->input);
>  	hid_hw_stop(hdev);
> +	input_unregister_device(msc->input);
>  	kfree(msc);
>  }

This looks OK.

Could you please send it altogether with short changelog entry and 
Signed-off-by line so that I could queue that up?

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Ed Tomlinson]

On Monday 15 February 2010 02:11:46 Dmitry Torokhov wrote:
> Almost... you need to do hid_hw_stop() first and only then unregister
> input device, Otherwise if you unload the module while moving the mouse
> it is likely to still oops.

The exit routing for the module also has a hid_hw_stop.  Is it going to cause
problems when it gets called twice?

TIA
Ed

Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps

[Jiri Kosina]

On Tue, 16 Feb 2010, Ed Tomlinson wrote:

> > Almost... you need to do hid_hw_stop() first and only then unregister
> > input device, Otherwise if you unload the module while moving the mouse
> > it is likely to still oops.
> 
> The exit routing for the module also has a hid_hw_stop.  Is it going to cause
> problems when it gets called twice?

The routine wasn't probably meant/designed with re-entrancy in mind, but 
looking quickly at all the subsequent callpaths, I don't see why it should 
cause any problem, as skb_queue_purge(), usb_kill_urb() and usb_free_urb() 
should be safe.

Maybe we should even add test_bit() for HID_STARTED and HID_DISCONNECTED 
at the beginning of the low-level drivers' ->stop callbacks, so that we 
don't do all the magic when all the work has been already done.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

[PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

Hi,

Here is a patch that enables xy scrolling with the magic mouse.  I have also
changed the accelleration logic to work better with xy scrolling.

Comments
Ed Tomlinson

---
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index b20484a..3075d78 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -59,7 +59,7 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
  * @delta_time: 18-bit difference between the two most recent touch
  *     reports from the mouse.
  * @ntouches: Number of touches in most recent touch report.
- * @scroll_accel: Number of consecutive scroll motions.
+ * @scroll_accely: Number of consecutive scroll motions.
  * @scroll_jiffies: Time of last scroll motion.
  * @touches: Most recent data for a touch, indexed by tracking ID.
  * @tracking_ids: Mapping of current touch input data to @touches.
@@ -71,11 +71,13 @@ struct magicmouse_sc {
 	int last_timestamp;
 	int delta_time;
 	int ntouches;
-	int scroll_accel;
+	int scroll_accely;
+	int scroll_accelx;
 	unsigned long scroll_jiffies;
 
 	struct {
 		short x;
+		short scroll_x;
 		short y;
 		short scroll_y;
 		u8 size;
@@ -139,8 +141,10 @@ static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 	input_report_key(msc->input, BTN_LEFT, state & 1);
 	input_report_key(msc->input, BTN_RIGHT, state & 2);
 
-	if (state != last_state)
-		msc->scroll_accel = 0;
+	if (state != last_state) {
+		msc->scroll_accely = 0;
+		msc->scroll_accelx = 0;
+	}
 }
 
 static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
@@ -159,34 +163,46 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 	msc->touches[id].size = misc & 63;
 
 	/* If requested, emulate a scroll wheel by detecting small
-	 * vertical touch motions along the middle of the mouse.
+	 * touch motions on the mouse.
 	 */
 	if (emulate_scroll_wheel &&
-	    middle_button_start < x && x < middle_button_stop) {
+	    msc->ntouches == 1) {
 		static const int accel_profile[] = {
-			256, 228, 192, 160, 128, 96, 64, 32,
+			192, 160, 128, 96, 64, 48, 32, 24,
 		};
 		unsigned long now = jiffies;
-		int step = msc->touches[id].scroll_y - y;
+		int stepx, stepy;
 
 		/* Reset acceleration after half a second. */
-		if (time_after(now, msc->scroll_jiffies + HZ / 2))
-			msc->scroll_accel = 0;
+		if (time_after(now, msc->scroll_jiffies + HZ / 2)) {
+			msc->scroll_accely = 0;
+			msc->scroll_accelx = 0;
+		}
 
-		/* Calculate and apply the scroll motion. */
 		switch (tdata[7] & TOUCH_STATE_MASK) {
 		case TOUCH_STATE_START:
 			msc->touches[id].scroll_y = y;
-			msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
-						ARRAY_SIZE(accel_profile) - 1);
+			msc->touches[id].scroll_x = x;
 			break;
 		case TOUCH_STATE_DRAG:
-			step = step / accel_profile[msc->scroll_accel];
-			if (step != 0) {
+			/* Calculate and apply the scroll motion. */
+			stepy = (msc->touches[id].scroll_y - y)/accel_profile[msc->scroll_accely];
+			stepx = (msc->touches[id].scroll_x - x)/accel_profile[msc->scroll_accelx];
+
+			/* tell input about any motions */
+			if (stepy != 0) {
 				msc->touches[id].scroll_y = y;
-				msc->scroll_jiffies = now;
-				input_report_rel(input, REL_WHEEL, step);
+				input_report_rel(input, REL_WHEEL, stepy);
+				msc->scroll_accely = min_t(int, msc->scroll_accely + 1,
+							        ARRAY_SIZE(accel_profile) - 1);
 			}
+			if (stepx != 0) {
+				msc->touches[id].scroll_x = x;
+				input_report_rel(input, REL_HWHEEL, stepx);
+				msc->scroll_accelx = min_t(int, msc->scroll_accelx + 1,
+							        ARRAY_SIZE(accel_profile) - 1);
+			}
+			msc->scroll_jiffies = now;
 			break;
 		}
 	}
@@ -300,8 +316,10 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
 	__set_bit(EV_REL, input->evbit);
 	__set_bit(REL_X, input->relbit);
 	__set_bit(REL_Y, input->relbit);
-	if (emulate_scroll_wheel)
+	if (emulate_scroll_wheel) {
 		__set_bit(REL_WHEEL, input->relbit);
+		__set_bit(REL_HWHEEL, input->relbit);
+	}
 
 	if (report_touches) {
 		__set_bit(EV_ABS, input->evbit);

[PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

Hi,

Here is a patch that enables xy scrolling with the magic mouse.  I have also
changed the accelleration logic to work better with xy scrolling.

Comments
Ed Tomlinson

---
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index b20484a..3075d78 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -59,7 +59,7 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
  * @delta_time: 18-bit difference between the two most recent touch
  *     reports from the mouse.
  * @ntouches: Number of touches in most recent touch report.
- * @scroll_accel: Number of consecutive scroll motions.
+ * @scroll_accely: Number of consecutive scroll motions.
  * @scroll_jiffies: Time of last scroll motion.
  * @touches: Most recent data for a touch, indexed by tracking ID.
  * @tracking_ids: Mapping of current touch input data to @touches.
@@ -71,11 +71,13 @@ struct magicmouse_sc {
 	int last_timestamp;
 	int delta_time;
 	int ntouches;
-	int scroll_accel;
+	int scroll_accely;
+	int scroll_accelx;
 	unsigned long scroll_jiffies;
 
 	struct {
 		short x;
+		short scroll_x;
 		short y;
 		short scroll_y;
 		u8 size;
@@ -139,8 +141,10 @@ static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 	input_report_key(msc->input, BTN_LEFT, state & 1);
 	input_report_key(msc->input, BTN_RIGHT, state & 2);
 
-	if (state != last_state)
-		msc->scroll_accel = 0;
+	if (state != last_state) {
+		msc->scroll_accely = 0;
+		msc->scroll_accelx = 0;
+	}
 }
 
 static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
@@ -159,34 +163,46 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 	msc->touches[id].size = misc & 63;
 
 	/* If requested, emulate a scroll wheel by detecting small
-	 * vertical touch motions along the middle of the mouse.
+	 * touch motions on the mouse.
 	 */
 	if (emulate_scroll_wheel &&
-	    middle_button_start < x && x < middle_button_stop) {
+	    msc->ntouches == 1) {
 		static const int accel_profile[] = {
-			256, 228, 192, 160, 128, 96, 64, 32,
+			192, 160, 128, 96, 64, 48, 32, 24,
 		};
 		unsigned long now = jiffies;
-		int step = msc->touches[id].scroll_y - y;
+		int stepx, stepy;
 
 		/* Reset acceleration after half a second. */
-		if (time_after(now, msc->scroll_jiffies + HZ / 2))
-			msc->scroll_accel = 0;
+		if (time_after(now, msc->scroll_jiffies + HZ / 2)) {
+			msc->scroll_accely = 0;
+			msc->scroll_accelx = 0;
+		}
 
-		/* Calculate and apply the scroll motion. */
 		switch (tdata[7] & TOUCH_STATE_MASK) {
 		case TOUCH_STATE_START:
 			msc->touches[id].scroll_y = y;
-			msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
-						ARRAY_SIZE(accel_profile) - 1);
+			msc->touches[id].scroll_x = x;
 			break;
 		case TOUCH_STATE_DRAG:
-			step = step / accel_profile[msc->scroll_accel];
-			if (step != 0) {
+			/* Calculate and apply the scroll motion. */
+			stepy = (msc->touches[id].scroll_y - y)/accel_profile[msc->scroll_accely];
+			stepx = (msc->touches[id].scroll_x - x)/accel_profile[msc->scroll_accelx];
+
+			/* tell input about any motions */
+			if (stepy != 0) {
 				msc->touches[id].scroll_y = y;
-				msc->scroll_jiffies = now;
-				input_report_rel(input, REL_WHEEL, step);
+				input_report_rel(input, REL_WHEEL, stepy);
+				msc->scroll_accely = min_t(int, msc->scroll_accely + 1,
+							        ARRAY_SIZE(accel_profile) - 1);
 			}
+			if (stepx != 0) {
+				msc->touches[id].scroll_x = x;
+				input_report_rel(input, REL_HWHEEL, stepx);
+				msc->scroll_accelx = min_t(int, msc->scroll_accelx + 1,
+							        ARRAY_SIZE(accel_profile) - 1);
+			}
+			msc->scroll_jiffies = now;
 			break;
 		}
 	}
@@ -300,8 +316,10 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
 	__set_bit(EV_REL, input->evbit);
 	__set_bit(REL_X, input->relbit);
 	__set_bit(REL_Y, input->relbit);
-	if (emulate_scroll_wheel)
+	if (emulate_scroll_wheel) {
 		__set_bit(REL_WHEEL, input->relbit);
+		__set_bit(REL_HWHEEL, input->relbit);
+	}
 
 	if (report_touches) {
 		__set_bit(EV_ABS, input->evbit);

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Michael Poole]

Ed Tomlinson writes:

> Hi,
>
> Here is a patch that enables xy scrolling with the magic mouse.  I have also
> changed the accelleration logic to work better with xy scrolling.

Hi Ed,

Your other patch to call input_unregister_device() looks good -- thanks!

I've never used a horizontal scroll wheel -- what are the common uses
for it?  Why should the acceleration be separate for the two directions
rather than using the same factor?  Why does the kernel need to emulate
this rather than having user-space implement the emulation?

(If the answers to the last two questions justify putting this feature
in the kernel, my only suggestions on the patch are style-related:
scroll_accel{x,y} should probably be spelled scroll_accel_{x,y}, and
there are missing spaces around the / operator when calculating stepx
and stepy.)

Michael Poole

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Michael Poole]

Ed Tomlinson writes:

> Hi,
>
> Here is a patch that enables xy scrolling with the magic mouse.  I have also
> changed the accelleration logic to work better with xy scrolling.

Hi Ed,

Your other patch to call input_unregister_device() looks good -- thanks!

I've never used a horizontal scroll wheel -- what are the common uses
for it?  Why should the acceleration be separate for the two directions
rather than using the same factor?  Why does the kernel need to emulate
this rather than having user-space implement the emulation?

(If the answers to the last two questions justify putting this feature
in the kernel, my only suggestions on the patch are style-related:
scroll_accel{x,y} should probably be spelled scroll_accel_{x,y}, and
there are missing spaces around the / operator when calculating stepx
and stepy.)

Michael Poole

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

On Sunday 14 February 2010 17:51:15 Michael Poole wrote:
> Ed Tomlinson writes:
> 
> > Hi,
> >
> > Here is a patch that enables xy scrolling with the magic mouse.  I have also
> > changed the accelleration logic to work better with xy scrolling.
> 
> Hi Ed,
> 
> Your other patch to call input_unregister_device() looks good -- thanks!

Thanks.  One question about it though.  Do we have to check if msc is null before
the unregister?

> I've never used a horizontal scroll wheel -- what are the common uses
> for it?  Why should the acceleration be separate for the two directions
> rather than using the same factor?  Why does the kernel need to emulate
> this rather than having user-space implement the emulation?

Its usefull for scrolling left and right while browsing.  If you use kde it can
be used to scroll between applications on the taskbar.   Here most applications
with a horizontial scrollbar work as expected.

I first tried with a single acceleration value for both axies.  It leads to confusing
things happening.   For example.  I quickly scroll down, then nudge the
window to the left.  This works as expect with two values.  With one the
nudge is accelerated and moves too far.

My personal goal is to have the basic, apple defined, gestures working
from kernel space.  This way the device works as expected without needing
to fiddle with X or other managers (think wayland and/or chromeOS).

> (If the answers to the last two questions justify putting this feature
> in the kernel, my only suggestions on the patch are style-related:
> scroll_accel{x,y} should probably be spelled scroll_accel_{x,y}, and
> there are missing spaces around the / operator when calculating stepx
> and stepy.)

I'll fix up the style and resubmit.

Thanks
Ed

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

On Sunday 14 February 2010 17:51:15 Michael Poole wrote:
> Ed Tomlinson writes:
> 
> > Hi,
> >
> > Here is a patch that enables xy scrolling with the magic mouse.  I have also
> > changed the accelleration logic to work better with xy scrolling.
> 
> Hi Ed,
> 
> Your other patch to call input_unregister_device() looks good -- thanks!

Thanks.  One question about it though.  Do we have to check if msc is null before
the unregister?

> I've never used a horizontal scroll wheel -- what are the common uses
> for it?  Why should the acceleration be separate for the two directions
> rather than using the same factor?  Why does the kernel need to emulate
> this rather than having user-space implement the emulation?

Its usefull for scrolling left and right while browsing.  If you use kde it can
be used to scroll between applications on the taskbar.   Here most applications
with a horizontial scrollbar work as expected.

I first tried with a single acceleration value for both axies.  It leads to confusing
things happening.   For example.  I quickly scroll down, then nudge the
window to the left.  This works as expect with two values.  With one the
nudge is accelerated and moves too far.

My personal goal is to have the basic, apple defined, gestures working
from kernel space.  This way the device works as expected without needing
to fiddle with X or other managers (think wayland and/or chromeOS).

> (If the answers to the last two questions justify putting this feature
> in the kernel, my only suggestions on the patch are style-related:
> scroll_accel{x,y} should probably be spelled scroll_accel_{x,y}, and
> there are missing spaces around the / operator when calculating stepx
> and stepy.)

I'll fix up the style and resubmit.

Thanks
Ed

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Dmitry Torokhov]

On Sun, Feb 14, 2010 at 06:58:26PM -0500, Ed Tomlinson wrote:
> On Sunday 14 February 2010 17:51:15 Michael Poole wrote:
> > Ed Tomlinson writes:
> > 
> > > Hi,
> > >
> > > Here is a patch that enables xy scrolling with the magic mouse.  I have also
> > > changed the accelleration logic to work better with xy scrolling.
> > 
> > Hi Ed,
> > 
> > Your other patch to call input_unregister_device() looks good -- thanks!
> 
> Thanks.  One question about it though.  Do we have to check if msc is null before
> the unregister?

If it is NULL whan remove() is running there are much bigger problems
with the driver/HID subsystem.

> 
> > I've never used a horizontal scroll wheel -- what are the common uses
> > for it?  Why should the acceleration be separate for the two directions
> > rather than using the same factor?  Why does the kernel need to emulate
> > this rather than having user-space implement the emulation?
> 
> Its usefull for scrolling left and right while browsing.  If you use kde it can
> be used to scroll between applications on the taskbar.   Here most applications
> with a horizontial scrollbar work as expected.
> 
> I first tried with a single acceleration value for both axies.  It leads to confusing
> things happening.   For example.  I quickly scroll down, then nudge the
> window to the left.  This works as expect with two values.  With one the
> nudge is accelerated and moves too far.
> 
> My personal goal is to have the basic, apple defined, gestures working
> from kernel space.  This way the device works as expected without needing
> to fiddle with X or other managers (think wayland and/or chromeOS).

I am not sure if this is the desired approach. The current idea is to
export useable but minimally processed events to userspace and let them
be turned into gestures there (by evdev, synaptics driver and so forth).

Thanks.
 
-- 
Dmitry

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

On Monday 15 February 2010 02:18:50 Dmitry Torokhov wrote:
> On Sun, Feb 14, 2010 at 06:58:26PM -0500, Ed Tomlinson wrote:
> > On Sunday 14 February 2010 17:51:15 Michael Poole wrote:
> > > Ed Tomlinson writes:
> > > 
> > > > Hi,
> > > >
> > > > Here is a patch that enables xy scrolling with the magic mouse.  I have also
> > > > changed the accelleration logic to work better with xy scrolling.
> > > 
> > > Hi Ed,
> > > 
> > > Your other patch to call input_unregister_device() looks good -- thanks!
> > 
> > Thanks.  One question about it though.  Do we have to check if msc is null before
> > the unregister?
> 
> If it is NULL whan remove() is running there are much bigger problems
> with the driver/HID subsystem.
> 
> > 
> > > I've never used a horizontal scroll wheel -- what are the common uses
> > > for it?  Why should the acceleration be separate for the two directions
> > > rather than using the same factor?  Why does the kernel need to emulate
> > > this rather than having user-space implement the emulation?
> > 
> > Its usefull for scrolling left and right while browsing.  If you use kde it can
> > be used to scroll between applications on the taskbar.   Here most applications
> > with a horizontial scrollbar work as expected.
> > 
> > I first tried with a single acceleration value for both axies.  It leads to confusing
> > things happening.   For example.  I quickly scroll down, then nudge the
> > window to the left.  This works as expect with two values.  With one the
> > nudge is accelerated and moves too far.
> > 
> > My personal goal is to have the basic, apple defined, gestures working
> > from kernel space.  This way the device works as expected without needing
> > to fiddle with X or other managers (think wayland and/or chromeOS).
> 
> I am not sure if this is the desired approach. The current idea is to
> export useable but minimally processed events to userspace and let them
> be turned into gestures there (by evdev, synaptics driver and so forth).

I would go along with this if the code to add the emulation in kernel was large or complex.  
Its not.  About 30 more lines should add the pgup/pgdn code.  

Thanks
Ed

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

On Monday 15 February 2010 02:18:50 Dmitry Torokhov wrote:
> On Sun, Feb 14, 2010 at 06:58:26PM -0500, Ed Tomlinson wrote:
> > On Sunday 14 February 2010 17:51:15 Michael Poole wrote:
> > > Ed Tomlinson writes:
> > > 
> > > > Hi,
> > > >
> > > > Here is a patch that enables xy scrolling with the magic mouse.  I have also
> > > > changed the accelleration logic to work better with xy scrolling.
> > > 
> > > Hi Ed,
> > > 
> > > Your other patch to call input_unregister_device() looks good -- thanks!
> > 
> > Thanks.  One question about it though.  Do we have to check if msc is null before
> > the unregister?
> 
> If it is NULL whan remove() is running there are much bigger problems
> with the driver/HID subsystem.
> 
> > 
> > > I've never used a horizontal scroll wheel -- what are the common uses
> > > for it?  Why should the acceleration be separate for the two directions
> > > rather than using the same factor?  Why does the kernel need to emulate
> > > this rather than having user-space implement the emulation?
> > 
> > Its usefull for scrolling left and right while browsing.  If you use kde it can
> > be used to scroll between applications on the taskbar.   Here most applications
> > with a horizontial scrollbar work as expected.
> > 
> > I first tried with a single acceleration value for both axies.  It leads to confusing
> > things happening.   For example.  I quickly scroll down, then nudge the
> > window to the left.  This works as expect with two values.  With one the
> > nudge is accelerated and moves too far.
> > 
> > My personal goal is to have the basic, apple defined, gestures working
> > from kernel space.  This way the device works as expected without needing
> > to fiddle with X or other managers (think wayland and/or chromeOS).
> 
> I am not sure if this is the desired approach. The current idea is to
> export useable but minimally processed events to userspace and let them
> be turned into gestures there (by evdev, synaptics driver and so forth).

I would go along with this if the code to add the emulation in kernel was large or complex.  
Its not.  About 30 more lines should add the pgup/pgdn code.  

Thanks
Ed

Re: [PATCH 1/1] Enable xy scrolling for Apple Magic Mouse

[Ed Tomlinson]

On Sunday 14 February 2010 17:51:15 Michael Poole wrote:
> Ed Tomlinson writes:
> 
> > Hi,
> >
> > Here is a patch that enables xy scrolling with the magic mouse.  I have also
> > changed the accelleration logic to work better with xy scrolling.
> 
> Hi Ed,
> 
> Your other patch to call input_unregister_device() looks good -- thanks!
> 
> I've never used a horizontal scroll wheel -- what are the common uses
> for it?  Why should the acceleration be separate for the two directions
> rather than using the same factor?  Why does the kernel need to emulate
> this rather than having user-space implement the emulation?

With style fixups.

Ed

--
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index b20484a..7d252d2 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -59,7 +59,8 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
  * @delta_time: 18-bit difference between the two most recent touch
  *     reports from the mouse.
  * @ntouches: Number of touches in most recent touch report.
- * @scroll_accel: Number of consecutive scroll motions.
+ * @scroll_accel_y: Number of consecutive scroll motions.
+ * @scroll_accel_x: Number of consecutive scroll motions.
  * @scroll_jiffies: Time of last scroll motion.
  * @touches: Most recent data for a touch, indexed by tracking ID.
  * @tracking_ids: Mapping of current touch input data to @touches.
@@ -71,11 +72,13 @@ struct magicmouse_sc {
 	int last_timestamp;
 	int delta_time;
 	int ntouches;
-	int scroll_accel;
+	int scroll_accel_y;
+	int scroll_accel_x;
 	unsigned long scroll_jiffies;
 
 	struct {
 		short x;
+		short scroll_x;
 		short y;
 		short scroll_y;
 		u8 size;
@@ -139,8 +142,10 @@ static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 	input_report_key(msc->input, BTN_LEFT, state & 1);
 	input_report_key(msc->input, BTN_RIGHT, state & 2);
 
-	if (state != last_state)
-		msc->scroll_accel = 0;
+	if (state != last_state) {
+		msc->scroll_accel_y = 0;
+		msc->scroll_accel_x = 0;
+	}
 }
 
 static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
@@ -159,34 +164,46 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
 	msc->touches[id].size = misc & 63;
 
 	/* If requested, emulate a scroll wheel by detecting small
-	 * vertical touch motions along the middle of the mouse.
+	 * touch motions on the mouse.
 	 */
 	if (emulate_scroll_wheel &&
-	    middle_button_start < x && x < middle_button_stop) {
+	    msc->ntouches == 1) {
 		static const int accel_profile[] = {
-			256, 228, 192, 160, 128, 96, 64, 32,
+			192, 160, 128, 96, 64, 48, 32, 24,
 		};
 		unsigned long now = jiffies;
-		int step = msc->touches[id].scroll_y - y;
+		int stepx, stepy;
 
 		/* Reset acceleration after half a second. */
-		if (time_after(now, msc->scroll_jiffies + HZ / 2))
-			msc->scroll_accel = 0;
+		if (time_after(now, msc->scroll_jiffies + HZ / 2)) {
+			msc->scroll_accel_y = 0;
+			msc->scroll_accel_x = 0;
+		}
 
-		/* Calculate and apply the scroll motion. */
 		switch (tdata[7] & TOUCH_STATE_MASK) {
 		case TOUCH_STATE_START:
 			msc->touches[id].scroll_y = y;
-			msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
-						ARRAY_SIZE(accel_profile) - 1);
+			msc->touches[id].scroll_x = x;
 			break;
 		case TOUCH_STATE_DRAG:
-			step = step / accel_profile[msc->scroll_accel];
-			if (step != 0) {
+			/* Calculate the scroll motion. */
+			stepy = (msc->touches[id].scroll_y - y) / accel_profile[msc->scroll_accel_y];
+			stepx = (msc->touches[id].scroll_x - x) / accel_profile[msc->scroll_accel_x];
+
+			/* Tell input about any motion. */
+			if (stepy != 0) {
 				msc->touches[id].scroll_y = y;
-				msc->scroll_jiffies = now;
-				input_report_rel(input, REL_WHEEL, step);
+				input_report_rel(input, REL_WHEEL, stepy);
+				msc->scroll_accel_y = min_t(int, msc->scroll_accel_y + 1,
+							        ARRAY_SIZE(accel_profile) - 1);
 			}
+			if (stepx != 0) {
+				msc->touches[id].scroll_x = x;
+				input_report_rel(input, REL_HWHEEL, stepx);
+				msc->scroll_accel_x = min_t(int, msc->scroll_accel_x + 1,
+							        ARRAY_SIZE(accel_profile) - 1);
+			}
+			msc->scroll_jiffies = now;
 			break;
 		}
 	}
@@ -300,8 +317,10 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
 	__set_bit(EV_REL, input->evbit);
 	__set_bit(REL_X, input->relbit);
 	__set_bit(REL_Y, input->relbit);
-	if (emulate_scroll_wheel)
+	if (emulate_scroll_wheel) {
 		__set_bit(REL_WHEEL, input->relbit);
+		__set_bit(REL_HWHEEL, input->relbit);
+	}
 
 	if (report_touches) {
 		__set_bit(EV_ABS, input->evbit);

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Justin P. Mattock]

On 02/09/10 02:14, Bastien Nocera wrote:
> On Mon, 2010-02-08 at 23:22 -0800, Justin Mattock wrote:
>>> TIA
>>> Ed Tomlinson
>>>
>>> On Friday 05 February 2010 12:51:43 Marcel Holtmann wrote:
>>>> Hi Michael,
>>>>
>>>>>> looks good to me. I just prefer that you do the allocation of the report
>>>>>> descriptor before the HID object:
>>>>>
>>>>> An updated patch is below.  Sorry for the delay -- inclement weather
>>>>> here got in the way of testing this as quickly as I would have liked.
>>>>>
>>>>>  From e245ef87247f5e257db40c412af7991c9af375ab Mon Sep 17 00:00:00 2001
>>>>> From: Michael Poole<mdpoole@troilus.org>
>>>>> Date: Fri, 5 Feb 2010 12:21:38 -0500
>>>>> Subject: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.
>>>>>
>>>>> The report descriptor is read by user space (via the Service
>>>>> Discovery Protocol), so it is only available during the ioctl
>>>>> to connect.  However, the probe function that needs the
>>>>> descriptor might not be called until a specific module is
>>>>> loaded.  Keep a copy of the descriptor so it is available for
>>>>> later use.
>>>>
>>>> patch has been applied. Thanks.
>>>>
>>>> Regards
>>>>
>>>> Marcel
>>>>
>>>>
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>> Please read the FAQ at  http://www.tux.org/lkml/
>>
>>
>>> Hi,
>>>
>>> I have been trying to test Michael's magic mouse drivers against 32.7 (or .8-rc).   Is there a tree
>>> based on .32 with these patches?  If not would it be possible to post the patches to lkml?  I do not
>>> mind sorting out a few conflicts - this thread assume one knows a little more about the process being
>>> used here than is obvious.
>>>
>>
>>
>> just got one of those magic things as well.
>> I did apply the patchs to the current HEAD, but
>> am getting a lifeless result i.g. here's what I did:
>>
>> sudo /usr/bin/hcitool scan
>> sudo /usr/bin/simple-agent hci0 D4:9A:20:88:C7:48

pin was already done at this point i.g. after 0000 was able to use
the mouse(no scroll function), but was able to work.
>> sudo /usr/bin/dbus-send --system --dest=org.bluez --print-reply
>> /org/bluez/1897/hci0/dev_D4_9A_20_88_C7_48 org.bluez.Input.Connect
>> sudo /usr/bin/test-device trusted D4:9A:20:88:C7:48
>>

this is to verify that you want to trust this device.
after this you should always be connected even after a reboot.
in this case magic mouse was not functioning after a reboot.

>> the thing works after that(no scroll), fast cursor though.
>> then reboot
>> once up and running nothing.
>> cat /var/log/daemon.log (shows this)
>>
>> Feb  8 22:57:40 Linux-1 bluetoothd[1973]: link_key_request
>> (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
>> Feb  8 22:58:21 Linux-1 bluetoothd[1973]: last message repeated 5 times
>> Feb  8 22:59:21 Linux-1 bluetoothd[1973]: last message repeated 3 times
>> Feb  8 23:03:10 Linux-1 bluetoothd[1973]: link_key_request
>> (sba=00:25:00:C0:6C:4F, dba=D4:9A:20:88:C7:48)
>
> That means that your computer and the mouse aren't paired. The pin code
> for Apple mice is usually "0000" (as opposed to most mice which don't
> need pairing, just a poke and setting as trusted).
>

I'll spend some time today(need a break from looking at another 
problem), to see if I can get this thing functioning.


>> (could be missing something though(don't use gnome/kde-bluetooth)although
>> mightymouse works).
>
> Cheers
>
>

Justin P. Mattock

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Bastien Nocera]

On Thu, 2010-02-04 at 07:26 -0500, Michael Poole wrote:
> Bastien and Marcel,
> 
> This patch works for me.  Bastien, does it also fix it for you?

Patch works great. Thanks for hunting it down.

Re: [PATCH] Bluetooth: Keep a copy of each HID device's report descriptor.

[Marcel Holtmann]

Hi Bastien,

> > This patch works for me.  Bastien, does it also fix it for you?
> 
> Patch works great. Thanks for hunting it down.

now I only need a modified version as requested and I can push that one
upstream with all the other fixes from the UnPlugFest testing.

Regards

Marcel

Re: [PATCH 0/3] HID: make raw output callback more flexible

[Marcel Holtmann]

Hi Jiri,

> this is a followup to the thread
> 
> 	"Implement Bluetooth Wacom tablet's mode change in the kernel"
> 
> First patch alters the raw output API so that it is able to actually 
> distinguish between feature and output reports (and modifies low-level 
> drivers accordingly), and the two followup patches make use of this for 
> in-kernel mode setting of Sony and Wacom bluetooth devices.
> 
> Marcel, could you please review the Bluetooth part?

I pushed the change for control vs. interrupt channel to the
bluetooth-2.6 tree and asked Dave to pull it. This was clear mistake
from in the first place.

When this lands, you need to redo the raw report patch.

Regards

Marcel