[PATCH] appletouch powersaving - please apply for 2.6.23-rc1

[PATCH] appletouch powersaving - please apply for 2.6.23-rc1

[Soeren Sonnenburg]

[-- Attachment #1: Type: text/plain, Size: 6867 bytes --]

Hi,

the attached minimally intrusive patch is based on Matthew Garret's
patch 'Make appletouch shut up when it has nothing to say' patches (e.g.
http://lkml.org/lkml/2007/5/13/117): Matthews description follows /
second paragraph lists my additional changes.

The appletouch geyser3 devices found in the Intel Macs (and possibly some later 
PPC ones?) send a constant stream of packets after the first touch. This 
results in the kernel waking up around once every couple of milliseconds 
to process them, making it almost impossible to spend any significant 
period of time in C3 state on a dynamic HZ kernel. Sending the mode 
initialization code makes the device shut up until it's touched again. 
This patch does so after receiving 10 packets with no interesting 
content.

In addition it now empties the work queue via cancel_work_sync on module
exit, keeps all error checking and only reports BTN_LEFT presses if bit
1 in the status byte (last byte in packet) is set. This fixes the random
left clicks issue. Furthermore it invalidates touchpad data before the
mode switch, which fixes the touchpad runs amok issue.

Credits:
Sven Anders found out that one should only check for bit 1 for BTN_LEFT.
Matthew Garrett did the initial 'Make appletouch shut up when it has
nothing to say' so I am adding him to the signed-off lines (hope that is
the correct way).

Patch follows inline and attached.

Soeren.

Signed-off-by: Soeren Sonnenburg <kernel@nn7.de>
Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index e321526..0426054 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -155,6 +155,8 @@ struct atp {
 	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
 	int			overflowwarn;	/* overflow warning printed? */
 	int			datalen;	/* size of an USB urb transfer */
+	int                     idlecount;      /* number of empty packets */
+	struct work_struct      work;
 };
 
 #define dbg_dump(msg, tab) \
@@ -208,6 +210,64 @@ static inline int atp_is_geyser_3(struct atp *dev)
 		(productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
+/*
+ * By default Geyser 3 device sends standard USB HID mouse
+ * packets (Report ID 2). This code changes device mode, so it
+ * sends raw sensor reports (Report ID 5).
+ */
+static int atp_geyser3_init(struct usb_device *udev)
+{
+	char data[8];
+	int size;
+	int i;
+
+	size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			       ATP_GEYSER3_MODE_READ_REQUEST_ID,
+			       USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			       ATP_GEYSER3_MODE_REQUEST_VALUE,
+			       ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init READ error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+
+		err("Could not do mode read request from device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+
+	/* Apply the mode switch */
+	data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			       ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			       ATP_GEYSER3_MODE_REQUEST_VALUE,
+			       ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+	
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init WRITE error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+		err("Could not do mode write request to device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+	return 0;
+}
+
+/* Reinitialise the device if it's a geyser 3 */
+static void atp_reinit(struct work_struct *work)
+{
+	struct atp *dev = container_of(work, struct atp, work);
+	struct usb_device *udev = dev->udev;
+
+	dev->idlecount = 0;
+	atp_geyser3_init(udev);
+}
+
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
 			     int *z, int *fingers)
 {
@@ -418,6 +478,8 @@ static void atp_complete(struct urb* urb)
 	y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
 			      ATP_YFACT, &y_z, &y_f);
 
+	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
+
 	if (x && y) {
 		if (dev->x_old != -1) {
 			x = (dev->x_old * 3 + x) >> 2;
@@ -449,10 +511,19 @@ static void atp_complete(struct urb* urb)
 
 		/* reset the accumulator on release */
 		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
-	}
 
-	input_report_key(dev->input, BTN_LEFT,
-			 !!dev->data[dev->datalen - 1]);
+		/* Geyser 3 will continue to send packets continually after
+		   the first touch unless reinitialised. Do so if it's been
+		   idle for a while in order to avoid waking the kernel up
+		   several hundred times a second */
+		if (atp_is_geyser_3(dev)) {
+			dev->idlecount++;
+			if (dev->idlecount == 10) {
+				dev->valid=0;
+				schedule_work (&dev->work);
+			}
+		}
+	}
 
 	input_sync(dev->input);
 
@@ -528,40 +599,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 		dev->datalen = 81;
 
 	if (atp_is_geyser_3(dev)) {
-		/*
-		 * By default Geyser 3 device sends standard USB HID mouse
-		 * packets (Report ID 2). This code changes device mode, so it
-		 * sends raw sensor reports (Report ID 5).
-		 */
-		char data[8];
-		int size;
-
-		size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_READ_REQUEST_ID,
-			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode read request from device"
-							" (Geyser 3 mode)");
+		/* switch to raw sensor mode */
+		if (atp_geyser3_init(udev))
 			goto err_free_devs;
-		}
-
-		/* Apply the mode switch */
-		data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
 
-		size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode write request to device"
-							" (Geyser 3 mode)");
-			goto err_free_devs;
-		}
 		printk("appletouch Geyser 3 inited.\n");
 	}
 
@@ -636,6 +677,8 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(iface, dev);
 
+	INIT_WORK(&dev->work, atp_reinit);
+
 	return 0;
 
  err_free_buffer:
@@ -656,6 +699,7 @@ static void atp_disconnect(struct usb_interface *iface)
 
 	usb_set_intfdata(iface, NULL);
 	if (dev) {
+		cancel_work_sync(&dev->work);
 		usb_kill_urb(dev->urb);
 		input_unregister_device(dev->input);
 		usb_buffer_free(dev->udev, dev->datalen,

-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.

[-- Attachment #2: appletouch.patch --]
[-- Type: text/x-patch, Size: 5392 bytes --]

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index e321526..0426054 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -155,6 +155,8 @@ struct atp {
 	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
 	int			overflowwarn;	/* overflow warning printed? */
 	int			datalen;	/* size of an USB urb transfer */
+	int                     idlecount;      /* number of empty packets */
+	struct work_struct      work;
 };
 
 #define dbg_dump(msg, tab) \
@@ -208,6 +210,64 @@ static inline int atp_is_geyser_3(struct atp *dev)
 		(productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
+/*
+ * By default Geyser 3 device sends standard USB HID mouse
+ * packets (Report ID 2). This code changes device mode, so it
+ * sends raw sensor reports (Report ID 5).
+ */
+static int atp_geyser3_init(struct usb_device *udev)
+{
+	char data[8];
+	int size;
+	int i;
+
+	size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			       ATP_GEYSER3_MODE_READ_REQUEST_ID,
+			       USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			       ATP_GEYSER3_MODE_REQUEST_VALUE,
+			       ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init READ error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+
+		err("Could not do mode read request from device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+
+	/* Apply the mode switch */
+	data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			       ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			       ATP_GEYSER3_MODE_REQUEST_VALUE,
+			       ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+	
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init WRITE error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+		err("Could not do mode write request to device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+	return 0;
+}
+
+/* Reinitialise the device if it's a geyser 3 */
+static void atp_reinit(struct work_struct *work)
+{
+	struct atp *dev = container_of(work, struct atp, work);
+	struct usb_device *udev = dev->udev;
+
+	dev->idlecount = 0;
+	atp_geyser3_init(udev);
+}
+
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
 			     int *z, int *fingers)
 {
@@ -418,6 +478,8 @@ static void atp_complete(struct urb* urb)
 	y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
 			      ATP_YFACT, &y_z, &y_f);
 
+	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
+
 	if (x && y) {
 		if (dev->x_old != -1) {
 			x = (dev->x_old * 3 + x) >> 2;
@@ -449,10 +511,19 @@ static void atp_complete(struct urb* urb)
 
 		/* reset the accumulator on release */
 		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
-	}
 
-	input_report_key(dev->input, BTN_LEFT,
-			 !!dev->data[dev->datalen - 1]);
+		/* Geyser 3 will continue to send packets continually after
+		   the first touch unless reinitialised. Do so if it's been
+		   idle for a while in order to avoid waking the kernel up
+		   several hundred times a second */
+		if (atp_is_geyser_3(dev)) {
+			dev->idlecount++;
+			if (dev->idlecount == 10) {
+				dev->valid=0;
+				schedule_work (&dev->work);
+			}
+		}
+	}
 
 	input_sync(dev->input);
 
@@ -528,40 +599,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 		dev->datalen = 81;
 
 	if (atp_is_geyser_3(dev)) {
-		/*
-		 * By default Geyser 3 device sends standard USB HID mouse
-		 * packets (Report ID 2). This code changes device mode, so it
-		 * sends raw sensor reports (Report ID 5).
-		 */
-		char data[8];
-		int size;
-
-		size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_READ_REQUEST_ID,
-			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode read request from device"
-							" (Geyser 3 mode)");
+		/* switch to raw sensor mode */
+		if (atp_geyser3_init(udev))
 			goto err_free_devs;
-		}
-
-		/* Apply the mode switch */
-		data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
 
-		size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode write request to device"
-							" (Geyser 3 mode)");
-			goto err_free_devs;
-		}
 		printk("appletouch Geyser 3 inited.\n");
 	}
 
@@ -636,6 +677,8 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(iface, dev);
 
+	INIT_WORK(&dev->work, atp_reinit);
+
 	return 0;
 
  err_free_buffer:
@@ -656,6 +699,7 @@ static void atp_disconnect(struct usb_interface *iface)
 
 	usb_set_intfdata(iface, NULL);
 	if (dev) {
+		cancel_work_sync(&dev->work);
 		usb_kill_urb(dev->urb);
 		input_unregister_device(dev->input);
 		usb_buffer_free(dev->udev, dev->datalen,

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1

[Johannes Berg]

[-- Attachment #1: Type: text/plain, Size: 922 bytes --]

Hi,

Good stuff :)

> +	int                     idlecount;      /* number of empty packets */

should probably use tabs here.

> +	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
> +			       ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
> +			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
> +			       ATP_GEYSER3_MODE_REQUEST_VALUE,
> +			       ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
> +	<eol>

trailing whitespace.

 
> +	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
> +


> @@ -449,10 +511,19 @@ static void atp_complete(struct urb* urb)
>  
>  		/* reset the accumulator on release */
>  		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
> -	}
>  
> -	input_report_key(dev->input, BTN_LEFT,
> -			 !!dev->data[dev->datalen - 1]);

Any hint as to why you move this? The different test, yes, ok, you
explained that, but moving it?

johannes

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 190 bytes --]

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1

[Soeren Sonnenburg]

[-- Attachment #1: Type: text/plain, Size: 1541 bytes --]

On Tue, 2007-07-17 at 15:03 +0200, Johannes Berg wrote:
> Hi,
> 
> Good stuff :)
> 
> > +	int                     idlecount;      /* number of empty packets */
> 
> should probably use tabs here.

fixed.

> > +	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
> > +			       ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
> > +			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
> > +			       ATP_GEYSER3_MODE_REQUEST_VALUE,
> > +			       ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
> > +	<eol>
> 
> trailing whitespace.

fixed
 
> > +	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
> > +
> 
> 
> > @@ -449,10 +511,19 @@ static void atp_complete(struct urb* urb)
> >  
> >  		/* reset the accumulator on release */
> >  		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
> > -	}
> >  
> > -	input_report_key(dev->input, BTN_LEFT,
> > -			 !!dev->data[dev->datalen - 1]);
> 
> Any hint as to why you move this? The different test, yes, ok, you
> explained that, but moving it?

OK, Sven Anders also asked why the move... and well the reason was that
when I was trying to figure out what goes wrong I memset everything
including dev->data to zero which required the move ...

Anyway as there is no goto/return inbetween I fail to see that this will
make any difference. So I moved the code back down where it was. 

The new patch containing these cleanups is attached.

Best,
Soeren
-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.

[-- Attachment #2: appletouch2.patch --]
[-- Type: text/x-patch, Size: 5078 bytes --]

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index e321526..34c1eca 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -155,6 +155,8 @@ struct atp {
 	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
 	int			overflowwarn;	/* overflow warning printed? */
 	int			datalen;	/* size of an USB urb transfer */
+	int			idlecount;      /* number of empty packets */
+	struct work_struct      work;
 };
 
 #define dbg_dump(msg, tab) \
@@ -208,6 +210,63 @@ static inline int atp_is_geyser_3(struct atp *dev)
 		(productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
+/*
+ * By default Geyser 3 device sends standard USB HID mouse
+ * packets (Report ID 2). This code changes device mode, so it
+ * sends raw sensor reports (Report ID 5).
+ */
+static int atp_geyser3_init(struct usb_device *udev)
+{
+	char data[8];
+	int size;
+	int i;
+
+	size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+				ATP_GEYSER3_MODE_READ_REQUEST_ID,
+				USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+				ATP_GEYSER3_MODE_REQUEST_VALUE,
+				ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init READ error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+
+		err("Could not do mode read request from device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+
+	/* Apply the mode switch */
+	data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+				USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+				ATP_GEYSER3_MODE_REQUEST_VALUE,
+				ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init WRITE error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+		err("Could not do mode write request to device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+	return 0;
+}
+
+/* Reinitialise the device if it's a geyser 3 */
+static void atp_reinit(struct work_struct *work)
+{
+	struct atp *dev = container_of(work, struct atp, work);
+	struct usb_device *udev = dev->udev;
+
+	dev->idlecount = 0;
+	atp_geyser3_init(udev);
+}
+
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
 			     int *z, int *fingers)
 {
@@ -449,11 +508,21 @@ static void atp_complete(struct urb* urb)
 
 		/* reset the accumulator on release */
 		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
-	}
 
-	input_report_key(dev->input, BTN_LEFT,
-			 !!dev->data[dev->datalen - 1]);
+		/* Geyser 3 will continue to send packets continually after
+		   the first touch unless reinitialised. Do so if it's been
+		   idle for a while in order to avoid waking the kernel up
+		   several hundred times a second */
+		if (atp_is_geyser_3(dev)) {
+			dev->idlecount++;
+			if (dev->idlecount == 10) {
+				dev->valid=0;
+				schedule_work (&dev->work);
+			}
+		}
+	}
 
+	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
 	input_sync(dev->input);
 
 exit:
@@ -528,40 +597,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 		dev->datalen = 81;
 
 	if (atp_is_geyser_3(dev)) {
-		/*
-		 * By default Geyser 3 device sends standard USB HID mouse
-		 * packets (Report ID 2). This code changes device mode, so it
-		 * sends raw sensor reports (Report ID 5).
-		 */
-		char data[8];
-		int size;
-
-		size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_READ_REQUEST_ID,
-			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode read request from device"
-							" (Geyser 3 mode)");
+		/* switch to raw sensor mode */
+		if (atp_geyser3_init(udev))
 			goto err_free_devs;
-		}
-
-		/* Apply the mode switch */
-		data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
-
-		size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
 
-		if (size != 8) {
-			err("Could not do mode write request to device"
-							" (Geyser 3 mode)");
-			goto err_free_devs;
-		}
 		printk("appletouch Geyser 3 inited.\n");
 	}
 
@@ -636,6 +675,8 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(iface, dev);
 
+	INIT_WORK(&dev->work, atp_reinit);
+
 	return 0;
 
  err_free_buffer:
@@ -656,6 +697,7 @@ static void atp_disconnect(struct usb_interface *iface)
 
 	usb_set_intfdata(iface, NULL);
 	if (dev) {
+		cancel_work_sync(&dev->work);
 		usb_kill_urb(dev->urb);
 		input_unregister_device(dev->input);
 		usb_buffer_free(dev->udev, dev->datalen,

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1

[Dmitry Torokhov]

Hi,

On 7/17/07, Soeren Sonnenburg <kernel@nn7.de> wrote:
>
>  err_free_buffer:
> @@ -656,6 +699,7 @@ static void atp_disconnect(struct usb_interface *iface)
>
>        usb_set_intfdata(iface, NULL);
>        if (dev) {
> +               cancel_work_sync(&dev->work);
>                usb_kill_urb(dev->urb);
>                input_unregister_device(dev->input);
>                usb_buffer_free(dev->udev, dev->datalen,
>

This should go into atp_close() and I think you need to do
cancel_work_sync after calling usb_kill_urb() otherwise you risk it
being submitted while you gettingto kill the urb.

How many boxes did you try this patch on?

-- 
Dmitry

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1 take #3

[Soeren Sonnenburg]

[-- Attachment #1: Type: text/plain, Size: 1218 bytes --]

On Tue, 2007-07-17 at 11:01 -0400, Dmitry Torokhov wrote:
> Hi,
> 
> On 7/17/07, Soeren Sonnenburg <kernel@nn7.de> wrote:
> >
> >  err_free_buffer:
> > @@ -656,6 +699,7 @@ static void atp_disconnect(struct usb_interface *iface)
> >
> >        usb_set_intfdata(iface, NULL);
> >        if (dev) {
> > +               cancel_work_sync(&dev->work);
> >                usb_kill_urb(dev->urb);
> >                input_unregister_device(dev->input);
> >                usb_buffer_free(dev->udev, dev->datalen,
> >
> 
> This should go into atp_close() and I think you need to do
> cancel_work_sync after calling usb_kill_urb() otherwise you risk it
> being submitted while you gettingto kill the urb.

good catch. modified patch accordingly+attached.

> How many boxes did you try this patch on?

Mine plus 1 other. However please note that Matthews patch has been
(which is what this patch is based on) is in the mactel-patches
repository for quite some time now and that the not-yet-cleanup up
variant of this patch was posted to mactel-devel...

So the modeswitch part should work...

Soeren
-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.

[-- Attachment #2: appletouch3.patch --]
[-- Type: text/x-patch, Size: 5005 bytes --]

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index e321526..7f180f7 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -155,6 +155,8 @@ struct atp {
 	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
 	int			overflowwarn;	/* overflow warning printed? */
 	int			datalen;	/* size of an USB urb transfer */
+	int			idlecount;      /* number of empty packets */
+	struct work_struct      work;
 };
 
 #define dbg_dump(msg, tab) \
@@ -208,6 +210,63 @@ static inline int atp_is_geyser_3(struct atp *dev)
 		(productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
+/*
+ * By default Geyser 3 device sends standard USB HID mouse
+ * packets (Report ID 2). This code changes device mode, so it
+ * sends raw sensor reports (Report ID 5).
+ */
+static int atp_geyser3_init(struct usb_device *udev)
+{
+	char data[8];
+	int size;
+	int i;
+
+	size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+				ATP_GEYSER3_MODE_READ_REQUEST_ID,
+				USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+				ATP_GEYSER3_MODE_REQUEST_VALUE,
+				ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init READ error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+
+		err("Could not do mode read request from device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+
+	/* Apply the mode switch */
+	data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+				USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+				ATP_GEYSER3_MODE_REQUEST_VALUE,
+				ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+	if (size != 8) {
+		printk("appletouch atp_geyser3_init WRITE error\n");
+		for (i=0; i<8; i++)
+			printk("appletouch[%d]: %d\n", i, (int) data[i]);
+		err("Could not do mode write request to device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+	return 0;
+}
+
+/* Reinitialise the device if it's a geyser 3 */
+static void atp_reinit(struct work_struct *work)
+{
+	struct atp *dev = container_of(work, struct atp, work);
+	struct usb_device *udev = dev->udev;
+
+	dev->idlecount = 0;
+	atp_geyser3_init(udev);
+}
+
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
 			     int *z, int *fingers)
 {
@@ -449,11 +508,21 @@ static void atp_complete(struct urb* urb)
 
 		/* reset the accumulator on release */
 		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
-	}
 
-	input_report_key(dev->input, BTN_LEFT,
-			 !!dev->data[dev->datalen - 1]);
+		/* Geyser 3 will continue to send packets continually after
+		   the first touch unless reinitialised. Do so if it's been
+		   idle for a while in order to avoid waking the kernel up
+		   several hundred times a second */
+		if (atp_is_geyser_3(dev)) {
+			dev->idlecount++;
+			if (dev->idlecount == 10) {
+				dev->valid=0;
+				schedule_work (&dev->work);
+			}
+		}
+	}
 
+	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
 	input_sync(dev->input);
 
 exit:
@@ -480,6 +549,7 @@ static void atp_close(struct input_dev *input)
 	struct atp *dev = input_get_drvdata(input);
 
 	usb_kill_urb(dev->urb);
+	cancel_work_sync(&dev->work);
 	dev->open = 0;
 }
 
@@ -528,40 +598,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 		dev->datalen = 81;
 
 	if (atp_is_geyser_3(dev)) {
-		/*
-		 * By default Geyser 3 device sends standard USB HID mouse
-		 * packets (Report ID 2). This code changes device mode, so it
-		 * sends raw sensor reports (Report ID 5).
-		 */
-		char data[8];
-		int size;
-
-		size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_READ_REQUEST_ID,
-			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode read request from device"
-							" (Geyser 3 mode)");
+		/* switch to raw sensor mode */
+		if (atp_geyser3_init(udev))
 			goto err_free_devs;
-		}
-
-		/* Apply the mode switch */
-		data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
-
-		size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
 
-		if (size != 8) {
-			err("Could not do mode write request to device"
-							" (Geyser 3 mode)");
-			goto err_free_devs;
-		}
 		printk("appletouch Geyser 3 inited.\n");
 	}
 
@@ -636,6 +676,8 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(iface, dev);
 
+	INIT_WORK(&dev->work, atp_reinit);
+
 	return 0;
 
  err_free_buffer:

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1 take #3

[Dmitry Torokhov]

On Tuesday 17 July 2007 14:16, Soeren Sonnenburg wrote:
> On Tue, 2007-07-17 at 11:01 -0400, Dmitry Torokhov wrote:
> > Hi,
> > 
> > On 7/17/07, Soeren Sonnenburg <kernel@nn7.de> wrote:
> > >
> > >  err_free_buffer:
> > > @@ -656,6 +699,7 @@ static void atp_disconnect(struct usb_interface *iface)
> > >
> > >        usb_set_intfdata(iface, NULL);
> > >        if (dev) {
> > > +               cancel_work_sync(&dev->work);
> > >                usb_kill_urb(dev->urb);
> > >                input_unregister_device(dev->input);
> > >                usb_buffer_free(dev->udev, dev->datalen,
> > >
> > 
> > This should go into atp_close() and I think you need to do
> > cancel_work_sync after calling usb_kill_urb() otherwise you risk it
> > being submitted while you gettingto kill the urb.
> 
> good catch. modified patch accordingly+attached.
> 
> > How many boxes did you try this patch on?
> 
> Mine plus 1 other. However please note that Matthews patch has been
> (which is what this patch is based on) is in the mactel-patches
> repository for quite some time now and that the not-yet-cleanup up
> variant of this patch was posted to mactel-devel...
> 
> So the modeswitch part should work...
> 

OK, can I please get signed-off-bys for the latest version so I can
apply it?

Thanks!

-- 
Dmitry

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1 take #3

[Soeren Sonnenburg]

On Tue, 2007-07-17 at 21:48 -0400, Dmitry Torokhov wrote:
> On Tuesday 17 July 2007 14:16, Soeren Sonnenburg wrote:
> > On Tue, 2007-07-17 at 11:01 -0400, Dmitry Torokhov wrote:
> [...]
> > > How many boxes did you try this patch on?
> > 
> > Mine plus 1 other. However please note that Matthews patch has been
> > (which is what this patch is based on) is in the mactel-patches
> > repository for quite some time now and that the not-yet-cleanup up
> > variant of this patch was posted to mactel-devel...
> > 
> > So the modeswitch part should work...
> > 
> 
> OK, can I please get signed-off-bys for the latest version so I can
> apply it?

They are the same as in the initial patch:

Signed-off-by: Soeren Sonnenburg <kernel@nn7.de>
Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>

Soeren
-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1

[Andrew Morton]

On Tue, 17 Jul 2007 09:10:18 +0200
Soeren Sonnenburg <kernel@nn7.de> wrote:

> the attached minimally intrusive patch is based on Matthew Garret's
> patch 'Make appletouch shut up when it has nothing to say' patches (e.g.
> http://lkml.org/lkml/2007/5/13/117): Matthews description follows /
> second paragraph lists my additional changes.
> 
> The appletouch geyser3 devices found in the Intel Macs (and possibly some later 
> PPC ones?) send a constant stream of packets after the first touch. This 
> results in the kernel waking up around once every couple of milliseconds 
> to process them, making it almost impossible to spend any significant 
> period of time in C3 state on a dynamic HZ kernel. Sending the mode 
> initialization code makes the device shut up until it's touched again. 
> This patch does so after receiving 10 packets with no interesting 
> content.
> 
> In addition it now empties the work queue via cancel_work_sync on module
> exit, keeps all error checking and only reports BTN_LEFT presses if bit
> 1 in the status byte (last byte in packet) is set. This fixes the random
> left clicks issue. Furthermore it invalidates touchpad data before the
> mode switch, which fixes the touchpad runs amok issue.

Please feed this through scripts/checkpatch.pl and consider addressing
all the things which it reports.

Re: [PATCH] appletouch powersaving - please apply for 2.6.23-rc1 - take #4

[Soeren Sonnenburg]

[-- Attachment #1: Type: text/plain, Size: 1909 bytes --]

On Wed, 2007-07-18 at 15:57 -0700, Andrew Morton wrote:
> On Tue, 17 Jul 2007 09:10:18 +0200
> Soeren Sonnenburg <kernel@nn7.de> wrote:
> 
> > the attached minimally intrusive patch is based on Matthew Garret's
> > patch 'Make appletouch shut up when it has nothing to say' patches (e.g.
> > http://lkml.org/lkml/2007/5/13/117): Matthews description follows /
> > second paragraph lists my additional changes.
> > 
> > The appletouch geyser3 devices found in the Intel Macs (and possibly some later 
> > PPC ones?) send a constant stream of packets after the first touch. This 
> > results in the kernel waking up around once every couple of milliseconds 
> > to process them, making it almost impossible to spend any significant 
> > period of time in C3 state on a dynamic HZ kernel. Sending the mode 
> > initialization code makes the device shut up until it's touched again. 
> > This patch does so after receiving 10 packets with no interesting 
> > content.
> > 
> > In addition it now empties the work queue via cancel_work_sync on module
> > exit, keeps all error checking and only reports BTN_LEFT presses if bit
> > 1 in the status byte (last byte in packet) is set. This fixes the random
> > left clicks issue. Furthermore it invalidates touchpad data before the
> > mode switch, which fixes the touchpad runs amok issue.
> 
> Please feed this through scripts/checkpatch.pl and consider addressing
> all the things which it reports.

So I did. Updated patch which differs in

dev->valid = 0; (note the space around =) and further removed debug code
(which never got triggered but checkpatch.pl complained about)
                                                                                                                                          
attached.

Soeren
-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.

[-- Attachment #2: appletouch4.patch --]
[-- Type: text/x-patch, Size: 6586 bytes --]

The attached patch is based on Matthew Garret's patch 'Make appletouch shut
up when it has nothing to say' patches (e.g. 
http://lkml.org/lkml/2007/5/13/117): Matthews description follows / second
paragraph lists my additional changes.

The appletouch geyser3 devices found in the Intel Macs (and possibly some
later PPC ones?) send a constant stream of packets after the first touch. 
This results in the kernel waking up around once every couple of
milliseconds to process them, making it almost impossible to spend any
significant period of time in C3 state on a dynamic HZ kernel.  Sending the
mode initialization code makes the device shut up until it's touched again.
 This patch does so after receiving 10 packets with no interesting content.

In addition it now empties the work queue via cancel_work_sync on module
exit, keeps all error checking and only reports BTN_LEFT presses if bit 1
in the status byte (last byte in packet) is set.  This fixes the random
left clicks issue.  Furthermore it invalidates touchpad data before the
mode switch, which fixes the touchpad runs amok issue.

Credits:
Sven Anders found out that one should only check for bit 1 for BTN_LEFT.
Matthew Garrett did the initial 'Make appletouch shut up when it has
nothing to say' so I am adding him to the signed-off lines (hope that is
the correct way).

Signed-off-by: Soeren Sonnenburg <kernel@nn7.de>
Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Nicolas Boichat <nicolas@boichat.ch>
Cc: Michael Hanselmann <linux-kernel@hansmi.ch>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Frank Arnold <frank@scirocco-5v-turbo.de>
Cc: Stelian Pop <stelian@popies.net>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Greg Kroah-Hartman <greg@kroah.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index e321526..f336b7b 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -155,6 +155,8 @@ struct atp {
 	int			xy_acc[ATP_XSENSORS + ATP_YSENSORS];
 	int			overflowwarn;	/* overflow warning printed? */
 	int			datalen;	/* size of an USB urb transfer */
+	int			idlecount;      /* number of empty packets */
+	struct work_struct      work;
 };
 
 #define dbg_dump(msg, tab) \
@@ -208,6 +210,55 @@ static inline int atp_is_geyser_3(struct atp *dev)
 		(productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
+/*
+ * By default Geyser 3 device sends standard USB HID mouse
+ * packets (Report ID 2). This code changes device mode, so it
+ * sends raw sensor reports (Report ID 5).
+ */
+static int atp_geyser3_init(struct usb_device *udev)
+{
+	char data[8];
+	int size;
+
+	size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			ATP_GEYSER3_MODE_READ_REQUEST_ID,
+			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			ATP_GEYSER3_MODE_REQUEST_VALUE,
+			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+	if (size != 8) {
+		err("Could not do mode read request from device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+
+	/* Apply the mode switch */
+	data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+	size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			ATP_GEYSER3_MODE_REQUEST_VALUE,
+			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+	if (size != 8) {
+		err("Could not do mode write request to device"
+		    " (Geyser 3 mode)");
+		return -EIO;
+	}
+	return 0;
+}
+
+/* Reinitialise the device if it's a geyser 3 */
+static void atp_reinit(struct work_struct *work)
+{
+	struct atp *dev = container_of(work, struct atp, work);
+	struct usb_device *udev = dev->udev;
+
+	dev->idlecount = 0;
+	atp_geyser3_init(udev);
+}
+
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
 			     int *z, int *fingers)
 {
@@ -449,11 +500,21 @@ static void atp_complete(struct urb* urb)
 
 		/* reset the accumulator on release */
 		memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
-	}
 
-	input_report_key(dev->input, BTN_LEFT,
-			 !!dev->data[dev->datalen - 1]);
+		/* Geyser 3 will continue to send packets continually after
+		   the first touch unless reinitialised. Do so if it's been
+		   idle for a while in order to avoid waking the kernel up
+		   several hundred times a second */
+		if (atp_is_geyser_3(dev)) {
+			dev->idlecount++;
+			if (dev->idlecount == 10) {
+				dev->valid = 0;
+				schedule_work (&dev->work);
+			}
+		}
+	}
 
+	input_report_key(dev->input, BTN_LEFT, dev->data[dev->datalen-1] & 1);
 	input_sync(dev->input);
 
 exit:
@@ -480,6 +541,7 @@ static void atp_close(struct input_dev *input)
 	struct atp *dev = input_get_drvdata(input);
 
 	usb_kill_urb(dev->urb);
+	cancel_work_sync(&dev->work);
 	dev->open = 0;
 }
 
@@ -528,40 +590,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 		dev->datalen = 81;
 
 	if (atp_is_geyser_3(dev)) {
-		/*
-		 * By default Geyser 3 device sends standard USB HID mouse
-		 * packets (Report ID 2). This code changes device mode, so it
-		 * sends raw sensor reports (Report ID 5).
-		 */
-		char data[8];
-		int size;
-
-		size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_READ_REQUEST_ID,
-			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-		if (size != 8) {
-			err("Could not do mode read request from device"
-							" (Geyser 3 mode)");
+		/* switch to raw sensor mode */
+		if (atp_geyser3_init(udev))
 			goto err_free_devs;
-		}
-
-		/* Apply the mode switch */
-		data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
-
-		size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
-			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			ATP_GEYSER3_MODE_REQUEST_VALUE,
-			ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
 
-		if (size != 8) {
-			err("Could not do mode write request to device"
-							" (Geyser 3 mode)");
-			goto err_free_devs;
-		}
 		printk("appletouch Geyser 3 inited.\n");
 	}
 
@@ -636,6 +668,8 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
 	/* save our data pointer in this interface device */
 	usb_set_intfdata(iface, dev);
 
+	INIT_WORK(&dev->work, atp_reinit);
+
 	return 0;
 
  err_free_buffer: