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Subject[RFC] USB: driver for iphone charging

my berry_charge code that adds support for charging the iphone when it
is plugged into a Linux machine.

As I don't have an iphone, can someone who does please test this out and
let me know if it works properly or not?

Matt, I fixed up the formatting of your original driver, fixed a sparse
warning, and the memory leak (which happens to also be in the
berry_charge driver, I'll go fix that too...)

Cc: Matt Colyer <matt@colyer.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/Makefile | 1
drivers/usb/misc/Kconfig | 11 ++++
drivers/usb/misc/Makefile | 1
drivers/usb/misc/iphone.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 120 insertions(+)
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_USB_FTDI_ELAN) += misc/
obj-$(CONFIG_USB_GOTEMP) += misc/
obj-$(CONFIG_USB_IDMOUSE) += misc/
obj-$(CONFIG_USB_IOWARRIOR) += misc/
+obj-$(CONFIG_USB_IPHONE) += misc/
obj-$(CONFIG_USB_LCD) += misc/
obj-$(CONFIG_USB_LD) += misc/
obj-$(CONFIG_USB_LED) += misc/
--- a/drivers/usb/misc/Kconfig
+++ b/drivers/usb/misc/Kconfig
@@ -99,6 +99,17 @@ config USB_BERRY_CHARGE
To compile this driver as a module, choose M here: the
module will be called berry_charge.

+config USB_IPHONE
+ tristate "USB iPhone recharge support"
+ depends on USB
+ help
+ Say Y here if you want to connect a iPhone device to your
+ computer's USB port and have it automatically switch to "recharge"
+ mode.
+
+ To compile this driver as a module, choose M here: the
+ module will be called iphone.
+
config USB_LED
tristate "USB LED driver support"
depends on USB
--- a/drivers/usb/misc/Makefile
+++ b/drivers/usb/misc/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_USB_FTDI_ELAN) += ftdi-elan
obj-$(CONFIG_USB_GOTEMP) += gotemp.o
obj-$(CONFIG_USB_IDMOUSE) += idmouse.o
obj-$(CONFIG_USB_IOWARRIOR) += iowarrior.o
+obj-$(CONFIG_USB_IPHONE) += iphone.o
obj-$(CONFIG_USB_LCD) += usblcd.o
obj-$(CONFIG_USB_LD) += ldusb.o
obj-$(CONFIG_USB_LED) += usbled.o
--- /dev/null
+++ b/drivers/usb/misc/iphone.c
@@ -0,0 +1,107 @@
+/*
+ * USB iPhone module
+ *
+ * Copyright (C) 2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (C) 2007 Matt Colyer <matt@colyer.name>
+ *
+ * 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, version 2.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#define APPLE_VENDOR 0x05ac
+#define IPHONE 0x1290
+
+static int debug;
+
+#ifdef dbg
+#undef dbg
+#endif
+#define dbg(dev, format, arg...) \
+ if (debug) \
+ dev_printk(KERN_DEBUG , dev , format , ## arg)
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(APPLE_VENDOR, IPHONE) },
+ { }, /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static int select_configuration(struct usb_device *udev)
+{
+ char *dummy_buffer = kzalloc(2, GFP_KERNEL);
+ int retval;
+
+ if (!dummy_buffer)
+ return -ENOMEM;
+
+ dbg(&udev->dev, "Calling set_configuration\n");
+ retval = usb_driver_set_configuration(udev, 3);
+ if (retval) {
+ dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
+ goto exit;
+ }
+
+ dbg(&udev->dev, "Sending first magic command\n");
+ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x40, 0x40,
+ 0x6400, 0, dummy_buffer, 0, 100);
+
+exit:
+ kfree(dummy_buffer);
+ return retval;
+}
+
+static int iphone_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+
+ if (udev->actconfig->desc.bConfigurationValue == 3) {
+ dbg(&udev->dev, "Configuration changed");
+ return -ENODEV;
+ }
+
+ /* turn the power on */
+ select_configuration(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;
+}
+
+static void iphone_disconnect(struct usb_interface *intf)
+{
+}
+
+static struct usb_driver iphone_driver = {
+ .name = "iphone",
+ .probe = iphone_probe,
+ .disconnect = iphone_disconnect,
+ .id_table = id_table,
+};
+
+static int __init iphone_init(void)
+{
+ return usb_register(&iphone_driver);
+}
+
+static void __exit iphone_exit(void)
+{
+ usb_deregister(&iphone_driver);
+}
+
+module_init(iphone_init);
+module_exit(iphone_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Matt Colyer <matt@colyer.name>");
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
-
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