USB: Support Blackberry Pearl with berry_charge

The Blackberry Pearl (8100) needs similar tweaks as older Blackberry models
to be able to charge when connected via USB.  The Pearl also adds an
additional need to go into a separate mode for fully accessing the device;
do that by default as well.

Changes based on the changes from bcharge in the barry project
(http://barry.sf.net)
Signed-off-by: Jeremy Katz <katzj@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/misc/berry_charge.c

@@ -26,8 +26,11 @@
 
 #define RIM_VENDOR		0x0fca
 #define BLACKBERRY		0x0001
+#define BLACKBERRY_PEARL_DUAL   0x0004
+#define BLACKBERRY_PEARL        0x0006
 
 static int debug;
+static int pearl_dual_mode = 1;
 
 #ifdef dbg
 #undef dbg
@@ -38,6 +41,8 @@ static int debug;
 
 static struct usb_device_id id_table [] = {
 	{ USB_DEVICE(RIM_VENDOR, BLACKBERRY) },
+	{ USB_DEVICE(RIM_VENDOR, BLACKBERRY_PEARL) },
+	{ USB_DEVICE(RIM_VENDOR, BLACKBERRY_PEARL_DUAL) },
 	{ },					/* Terminating entry */
 };
 MODULE_DEVICE_TABLE(usb, id_table);
@@ -86,6 +91,30 @@ static int magic_charge(struct usb_device *udev)
 	return retval;
 }
 
+static int magic_dual_mode(struct usb_device *udev)
+{
+	char *dummy_buffer = kzalloc(2, GFP_KERNEL);
+	int retval;
+
+	if (!dummy_buffer)
+		return -ENOMEM;
+
+	/* send magic command so that the Blackberry Pearl device exposes
+	 * two interfaces: both the USB mass-storage one and one which can
+	 * be used for database access. */
+	dbg(&udev->dev, "Sending magic pearl command\n");
+	retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+				 0xa9, 0xc0, 1, 1, dummy_buffer, 2, 100);
+	dbg(&udev->dev, "Magic pearl command returned %d\n", retval);
+
+	dbg(&udev->dev, "Calling set_configuration\n");
+	retval = usb_driver_set_configuration(udev, 1);
+	if (retval)
+		dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
+
+	return retval;
+}
+
 static int berry_probe(struct usb_interface *intf,
 		       const struct usb_device_id *id)
 {
@@ -105,6 +134,10 @@ static int berry_probe(struct usb_interface *intf,
 	/* turn the power on */
 	magic_charge(udev);
 
+	if ((le16_to_cpu(udev->descriptor.idProduct) == BLACKBERRY_PEARL) &&
+	    (pearl_dual_mode))
+		magic_dual_mode(udev);
+
 	/* we don't really want to bind to the device, userspace programs can
 	 * handle the syncing just fine, so get outta here. */
 	return -ENODEV;
@@ -138,3 +171,5 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
 module_param(debug, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Debug enabled or not");
+module_param(pearl_dual_mode, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(pearl_dual_mode, "Change Blackberry Pearl to run in dual mode");