Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1157 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
new file mode 100644
index 000000000000..c96728435935
--- /dev/null
+++ b/include/linux/usb.h
@@ -0,0 +1,1157 @@
+#ifndef __LINUX_USB_H
+#define __LINUX_USB_H
+
+#include <linux/mod_devicetable.h>
+#include <linux/usb_ch9.h>
+
+#define USB_MAJOR			180
+
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <linux/errno.h>        /* for -ENODEV */
+#include <linux/delay.h>	/* for mdelay() */
+#include <linux/interrupt.h>	/* for in_interrupt() */
+#include <linux/list.h>		/* for struct list_head */
+#include <linux/kref.h>		/* for struct kref */
+#include <linux/device.h>	/* for struct device */
+#include <linux/fs.h>		/* for struct file_operations */
+#include <linux/completion.h>	/* for struct completion */
+#include <linux/sched.h>	/* for current && schedule_timeout */
+
+struct usb_device;
+struct usb_driver;
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Host-side wrappers for standard USB descriptors ... these are parsed
+ * from the data provided by devices.  Parsing turns them from a flat
+ * sequence of descriptors into a hierarchy:
+ *
+ *  - devices have one (usually) or more configs;
+ *  - configs have one (often) or more interfaces;
+ *  - interfaces have one (usually) or more settings;
+ *  - each interface setting has zero or (usually) more endpoints.
+ *
+ * And there might be other descriptors mixed in with those.
+ *
+ * Devices may also have class-specific or vendor-specific descriptors.
+ */
+
+/**
+ * struct usb_host_endpoint - host-side endpoint descriptor and queue
+ * @desc: descriptor for this endpoint, wMaxPacketSize in native byteorder
+ * @urb_list: urbs queued to this endpoint; maintained by usbcore
+ * @hcpriv: for use by HCD; typically holds hardware dma queue head (QH)
+ *	with one or more transfer descriptors (TDs) per urb
+ * @extra: descriptors following this endpoint in the configuration
+ * @extralen: how many bytes of "extra" are valid
+ *
+ * USB requests are always queued to a given endpoint, identified by a
+ * descriptor within an active interface in a given USB configuration.
+ */
+struct usb_host_endpoint {
+	struct usb_endpoint_descriptor	desc;
+	struct list_head		urb_list;
+	void				*hcpriv;
+
+	unsigned char *extra;   /* Extra descriptors */
+	int extralen;
+};
+
+/* host-side wrapper for one interface setting's parsed descriptors */
+struct usb_host_interface {
+	struct usb_interface_descriptor	desc;
+
+	/* array of desc.bNumEndpoint endpoints associated with this
+	 * interface setting.  these will be in no particular order.
+	 */
+	struct usb_host_endpoint *endpoint;
+
+	char *string;		/* iInterface string, if present */
+	unsigned char *extra;   /* Extra descriptors */
+	int extralen;
+};
+
+enum usb_interface_condition {
+	USB_INTERFACE_UNBOUND = 0,
+	USB_INTERFACE_BINDING,
+	USB_INTERFACE_BOUND,
+	USB_INTERFACE_UNBINDING,
+};
+
+/**
+ * struct usb_interface - what usb device drivers talk to
+ * @altsetting: array of interface structures, one for each alternate
+ * 	setting that may be selected.  Each one includes a set of
+ * 	endpoint configurations.  They will be in no particular order.
+ * @num_altsetting: number of altsettings defined.
+ * @cur_altsetting: the current altsetting.
+ * @driver: the USB driver that is bound to this interface.
+ * @minor: the minor number assigned to this interface, if this
+ *	interface is bound to a driver that uses the USB major number.
+ *	If this interface does not use the USB major, this field should
+ *	be unused.  The driver should set this value in the probe()
+ *	function of the driver, after it has been assigned a minor
+ *	number from the USB core by calling usb_register_dev().
+ * @condition: binding state of the interface: not bound, binding
+ *	(in probe()), bound to a driver, or unbinding (in disconnect())
+ * @dev: driver model's view of this device
+ * @class_dev: driver model's class view of this device.
+ *
+ * USB device drivers attach to interfaces on a physical device.  Each
+ * interface encapsulates a single high level function, such as feeding
+ * an audio stream to a speaker or reporting a change in a volume control.
+ * Many USB devices only have one interface.  The protocol used to talk to
+ * an interface's endpoints can be defined in a usb "class" specification,
+ * or by a product's vendor.  The (default) control endpoint is part of
+ * every interface, but is never listed among the interface's descriptors.
+ *
+ * The driver that is bound to the interface can use standard driver model
+ * calls such as dev_get_drvdata() on the dev member of this structure.
+ *
+ * Each interface may have alternate settings.  The initial configuration
+ * of a device sets altsetting 0, but the device driver can change
+ * that setting using usb_set_interface().  Alternate settings are often
+ * used to control the the use of periodic endpoints, such as by having
+ * different endpoints use different amounts of reserved USB bandwidth.
+ * All standards-conformant USB devices that use isochronous endpoints
+ * will use them in non-default settings.
+ *
+ * The USB specification says that alternate setting numbers must run from
+ * 0 to one less than the total number of alternate settings.  But some
+ * devices manage to mess this up, and the structures aren't necessarily
+ * stored in numerical order anyhow.  Use usb_altnum_to_altsetting() to
+ * look up an alternate setting in the altsetting array based on its number.
+ */
+struct usb_interface {
+	/* array of alternate settings for this interface,
+	 * stored in no particular order */
+	struct usb_host_interface *altsetting;
+
+	struct usb_host_interface *cur_altsetting;	/* the currently
+					 * active alternate setting */
+	unsigned num_altsetting;	/* number of alternate settings */
+
+	int minor;			/* minor number this interface is bound to */
+	enum usb_interface_condition condition;		/* state of binding */
+	struct device dev;		/* interface specific device info */
+	struct class_device *class_dev;
+};
+#define	to_usb_interface(d) container_of(d, struct usb_interface, dev)
+#define	interface_to_usbdev(intf) \
+	container_of(intf->dev.parent, struct usb_device, dev)
+
+static inline void *usb_get_intfdata (struct usb_interface *intf)
+{
+	return dev_get_drvdata (&intf->dev);
+}
+
+static inline void usb_set_intfdata (struct usb_interface *intf, void *data)
+{
+	dev_set_drvdata(&intf->dev, data);
+}
+
+struct usb_interface *usb_get_intf(struct usb_interface *intf);
+void usb_put_intf(struct usb_interface *intf);
+
+/* this maximum is arbitrary */
+#define USB_MAXINTERFACES	32
+
+/**
+ * struct usb_interface_cache - long-term representation of a device interface
+ * @num_altsetting: number of altsettings defined.
+ * @ref: reference counter.
+ * @altsetting: variable-length array of interface structures, one for
+ *	each alternate setting that may be selected.  Each one includes a
+ *	set of endpoint configurations.  They will be in no particular order.
+ *
+ * These structures persist for the lifetime of a usb_device, unlike
+ * struct usb_interface (which persists only as long as its configuration
+ * is installed).  The altsetting arrays can be accessed through these
+ * structures at any time, permitting comparison of configurations and
+ * providing support for the /proc/bus/usb/devices pseudo-file.
+ */
+struct usb_interface_cache {
+	unsigned num_altsetting;	/* number of alternate settings */
+	struct kref ref;		/* reference counter */
+
+	/* variable-length array of alternate settings for this interface,
+	 * stored in no particular order */
+	struct usb_host_interface altsetting[0];
+};
+#define	ref_to_usb_interface_cache(r) \
+		container_of(r, struct usb_interface_cache, ref)
+#define	altsetting_to_usb_interface_cache(a) \
+		container_of(a, struct usb_interface_cache, altsetting[0])
+
+/**
+ * struct usb_host_config - representation of a device's configuration
+ * @desc: the device's configuration descriptor.
+ * @string: pointer to the cached version of the iConfiguration string, if
+ *	present for this configuration.
+ * @interface: array of pointers to usb_interface structures, one for each
+ *	interface in the configuration.  The number of interfaces is stored
+ *	in desc.bNumInterfaces.  These pointers are valid only while the
+ *	the configuration is active.
+ * @intf_cache: array of pointers to usb_interface_cache structures, one
+ *	for each interface in the configuration.  These structures exist
+ *	for the entire life of the device.
+ * @extra: pointer to buffer containing all extra descriptors associated
+ *	with this configuration (those preceding the first interface
+ *	descriptor).
+ * @extralen: length of the extra descriptors buffer.
+ *
+ * USB devices may have multiple configurations, but only one can be active
+ * at any time.  Each encapsulates a different operational environment;
+ * for example, a dual-speed device would have separate configurations for
+ * full-speed and high-speed operation.  The number of configurations
+ * available is stored in the device descriptor as bNumConfigurations.
+ *
+ * A configuration can contain multiple interfaces.  Each corresponds to
+ * a different function of the USB device, and all are available whenever
+ * the configuration is active.  The USB standard says that interfaces
+ * are supposed to be numbered from 0 to desc.bNumInterfaces-1, but a lot
+ * of devices get this wrong.  In addition, the interface array is not
+ * guaranteed to be sorted in numerical order.  Use usb_ifnum_to_if() to
+ * look up an interface entry based on its number.
+ *
+ * Device drivers should not attempt to activate configurations.  The choice
+ * of which configuration to install is a policy decision based on such
+ * considerations as available power, functionality provided, and the user's
+ * desires (expressed through hotplug scripts).  However, drivers can call
+ * usb_reset_configuration() to reinitialize the current configuration and
+ * all its interfaces.
+ */
+struct usb_host_config {
+	struct usb_config_descriptor	desc;
+
+	char *string;
+	/* the interfaces associated with this configuration,
+	 * stored in no particular order */
+	struct usb_interface *interface[USB_MAXINTERFACES];
+
+	/* Interface information available even when this is not the
+	 * active configuration */
+	struct usb_interface_cache *intf_cache[USB_MAXINTERFACES];
+
+	unsigned char *extra;   /* Extra descriptors */
+	int extralen;
+};
+
+int __usb_get_extra_descriptor(char *buffer, unsigned size,
+	unsigned char type, void **ptr);
+#define usb_get_extra_descriptor(ifpoint,type,ptr)\
+	__usb_get_extra_descriptor((ifpoint)->extra,(ifpoint)->extralen,\
+		type,(void**)ptr)
+
+/* -------------------------------------------------------------------------- */
+
+struct usb_operations;
+
+/* USB device number allocation bitmap */
+struct usb_devmap {
+	unsigned long devicemap[128 / (8*sizeof(unsigned long))];
+};
+
+/*
+ * Allocated per bus (tree of devices) we have:
+ */
+struct usb_bus {
+	struct device *controller;	/* host/master side hardware */
+	int busnum;			/* Bus number (in order of reg) */
+	char *bus_name;			/* stable id (PCI slot_name etc) */
+	u8 otg_port;			/* 0, or number of OTG/HNP port */
+	unsigned is_b_host:1;		/* true during some HNP roleswitches */
+	unsigned b_hnp_enable:1;	/* OTG: did A-Host enable HNP? */
+
+	int devnum_next;		/* Next open device number in round-robin allocation */
+
+	struct usb_devmap devmap;	/* device address allocation map */
+	struct usb_operations *op;	/* Operations (specific to the HC) */
+	struct usb_device *root_hub;	/* Root hub */
+	struct list_head bus_list;	/* list of busses */
+	void *hcpriv;                   /* Host Controller private data */
+
+	int bandwidth_allocated;	/* on this bus: how much of the time
+					 * reserved for periodic (intr/iso)
+					 * requests is used, on average?
+					 * Units: microseconds/frame.
+					 * Limits: Full/low speed reserve 90%,
+					 * while high speed reserves 80%.
+					 */
+	int bandwidth_int_reqs;		/* number of Interrupt requests */
+	int bandwidth_isoc_reqs;	/* number of Isoc. requests */
+
+	struct dentry *usbfs_dentry;	/* usbfs dentry entry for the bus */
+
+	struct class_device class_dev;	/* class device for this bus */
+	void (*release)(struct usb_bus *bus);	/* function to destroy this bus's memory */
+#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
+	struct mon_bus *mon_bus;	/* non-null when associated */
+	int monitored;			/* non-zero when monitored */
+#endif
+};
+#define	to_usb_bus(d) container_of(d, struct usb_bus, class_dev)
+
+
+/* -------------------------------------------------------------------------- */
+
+/* This is arbitrary.
+ * From USB 2.0 spec Table 11-13, offset 7, a hub can
+ * have up to 255 ports. The most yet reported is 10.
+ */
+#define USB_MAXCHILDREN		(16)
+
+struct usb_tt;
+
+/*
+ * struct usb_device - kernel's representation of a USB device
+ *
+ * FIXME: Write the kerneldoc!
+ *
+ * Usbcore drivers should not set usbdev->state directly.  Instead use
+ * usb_set_device_state().
+ */
+struct usb_device {
+	int		devnum;		/* Address on USB bus */
+	char		devpath [16];	/* Use in messages: /port/port/... */
+	enum usb_device_state	state;	/* configured, not attached, etc */
+	enum usb_device_speed	speed;	/* high/full/low (or error) */
+
+	struct usb_tt	*tt; 		/* low/full speed dev, highspeed hub */
+	int		ttport;		/* device port on that tt hub */
+
+	struct semaphore serialize;
+
+	unsigned int toggle[2];		/* one bit for each endpoint ([0] = IN, [1] = OUT) */
+
+	struct usb_device *parent;	/* our hub, unless we're the root */
+	struct usb_bus *bus;		/* Bus we're part of */
+	struct usb_host_endpoint ep0;
+
+	struct device dev;		/* Generic device interface */
+
+	struct usb_device_descriptor descriptor;/* Descriptor */
+	struct usb_host_config *config;	/* All of the configs */
+
+	struct usb_host_config *actconfig;/* the active configuration */
+	struct usb_host_endpoint *ep_in[16];
+	struct usb_host_endpoint *ep_out[16];
+
+	char **rawdescriptors;		/* Raw descriptors for each config */
+
+	int have_langid;		/* whether string_langid is valid yet */
+	int string_langid;		/* language ID for strings */
+
+	char *product;
+	char *manufacturer;
+	char *serial;			/* static strings from the device */
+	struct list_head filelist;
+	struct dentry *usbfs_dentry;	/* usbfs dentry entry for the device */
+
+	/*
+	 * Child devices - these can be either new devices
+	 * (if this is a hub device), or different instances
+	 * of this same device.
+	 *
+	 * Each instance needs its own set of data structures.
+	 */
+
+	int maxchild;			/* Number of ports if hub */
+	struct usb_device *children[USB_MAXCHILDREN];
+};
+#define	to_usb_device(d) container_of(d, struct usb_device, dev)
+
+extern struct usb_device *usb_get_dev(struct usb_device *dev);
+extern void usb_put_dev(struct usb_device *dev);
+
+extern void usb_lock_device(struct usb_device *udev);
+extern int usb_trylock_device(struct usb_device *udev);
+extern int usb_lock_device_for_reset(struct usb_device *udev,
+		struct usb_interface *iface);
+extern void usb_unlock_device(struct usb_device *udev);
+
+/* USB port reset for device reinitialization */
+extern int usb_reset_device(struct usb_device *dev);
+
+extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id);
+
+/*-------------------------------------------------------------------------*/
+
+/* for drivers using iso endpoints */
+extern int usb_get_current_frame_number (struct usb_device *usb_dev);
+
+/* used these for multi-interface device registration */
+extern int usb_driver_claim_interface(struct usb_driver *driver,
+			struct usb_interface *iface, void* priv);
+
+/**
+ * usb_interface_claimed - returns true iff an interface is claimed
+ * @iface: the interface being checked
+ *
+ * Returns true (nonzero) iff the interface is claimed, else false (zero).
+ * Callers must own the driver model's usb bus readlock.  So driver
+ * probe() entries don't need extra locking, but other call contexts
+ * may need to explicitly claim that lock.
+ *
+ */
+static inline int usb_interface_claimed(struct usb_interface *iface) {
+	return (iface->dev.driver != NULL);
+}
+
+extern void usb_driver_release_interface(struct usb_driver *driver,
+			struct usb_interface *iface);
+const struct usb_device_id *usb_match_id(struct usb_interface *interface,
+					 const struct usb_device_id *id);
+
+extern struct usb_interface *usb_find_interface(struct usb_driver *drv,
+		int minor);
+extern struct usb_interface *usb_ifnum_to_if(struct usb_device *dev,
+		unsigned ifnum);
+extern struct usb_host_interface *usb_altnum_to_altsetting(
+		struct usb_interface *intf, unsigned int altnum);
+
+
+/**
+ * usb_make_path - returns stable device path in the usb tree
+ * @dev: the device whose path is being constructed
+ * @buf: where to put the string
+ * @size: how big is "buf"?
+ *
+ * Returns length of the string (> 0) or negative if size was too small.
+ *
+ * This identifier is intended to be "stable", reflecting physical paths in
+ * hardware such as physical bus addresses for host controllers or ports on
+ * USB hubs.  That makes it stay the same until systems are physically
+ * reconfigured, by re-cabling a tree of USB devices or by moving USB host
+ * controllers.  Adding and removing devices, including virtual root hubs
+ * in host controller driver modules, does not change these path identifers;
+ * neither does rebooting or re-enumerating.  These are more useful identifiers
+ * than changeable ("unstable") ones like bus numbers or device addresses.
+ *
+ * With a partial exception for devices connected to USB 2.0 root hubs, these
+ * identifiers are also predictable.  So long as the device tree isn't changed,
+ * plugging any USB device into a given hub port always gives it the same path.
+ * Because of the use of "companion" controllers, devices connected to ports on
+ * USB 2.0 root hubs (EHCI host controllers) will get one path ID if they are
+ * high speed, and a different one if they are full or low speed.
+ */
+static inline int usb_make_path (struct usb_device *dev, char *buf, size_t size)
+{
+	int actual;
+	actual = snprintf (buf, size, "usb-%s-%s", dev->bus->bus_name, dev->devpath);
+	return (actual >= (int)size) ? -1 : actual;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define USB_DEVICE_ID_MATCH_DEVICE		(USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT)
+#define USB_DEVICE_ID_MATCH_DEV_RANGE		(USB_DEVICE_ID_MATCH_DEV_LO | USB_DEVICE_ID_MATCH_DEV_HI)
+#define USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION	(USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_RANGE)
+#define USB_DEVICE_ID_MATCH_DEV_INFO \
+	(USB_DEVICE_ID_MATCH_DEV_CLASS | USB_DEVICE_ID_MATCH_DEV_SUBCLASS | USB_DEVICE_ID_MATCH_DEV_PROTOCOL)
+#define USB_DEVICE_ID_MATCH_INT_INFO \
+	(USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS | USB_DEVICE_ID_MATCH_INT_PROTOCOL)
+
+/**
+ * USB_DEVICE - macro used to describe a specific usb device
+ * @vend: the 16 bit USB Vendor ID
+ * @prod: the 16 bit USB Product ID
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific device.
+ */
+#define USB_DEVICE(vend,prod) \
+	.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = (vend), .idProduct = (prod)
+/**
+ * USB_DEVICE_VER - macro used to describe a specific usb device with a version range
+ * @vend: the 16 bit USB Vendor ID
+ * @prod: the 16 bit USB Product ID
+ * @lo: the bcdDevice_lo value
+ * @hi: the bcdDevice_hi value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific device, with a version range.
+ */
+#define USB_DEVICE_VER(vend,prod,lo,hi) \
+	.match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, .idVendor = (vend), .idProduct = (prod), .bcdDevice_lo = (lo), .bcdDevice_hi = (hi)
+
+/**
+ * USB_DEVICE_INFO - macro used to describe a class of usb devices
+ * @cl: bDeviceClass value
+ * @sc: bDeviceSubClass value
+ * @pr: bDeviceProtocol value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific class of devices.
+ */
+#define USB_DEVICE_INFO(cl,sc,pr) \
+	.match_flags = USB_DEVICE_ID_MATCH_DEV_INFO, .bDeviceClass = (cl), .bDeviceSubClass = (sc), .bDeviceProtocol = (pr)
+
+/**
+ * USB_INTERFACE_INFO - macro used to describe a class of usb interfaces 
+ * @cl: bInterfaceClass value
+ * @sc: bInterfaceSubClass value
+ * @pr: bInterfaceProtocol value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific class of interfaces.
+ */
+#define USB_INTERFACE_INFO(cl,sc,pr) \
+	.match_flags = USB_DEVICE_ID_MATCH_INT_INFO, .bInterfaceClass = (cl), .bInterfaceSubClass = (sc), .bInterfaceProtocol = (pr)
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * struct usb_driver - identifies USB driver to usbcore
+ * @owner: Pointer to the module owner of this driver; initialize
+ *	it using THIS_MODULE.
+ * @name: The driver name should be unique among USB drivers,
+ *	and should normally be the same as the module name.
+ * @probe: Called to see if the driver is willing to manage a particular
+ *	interface on a device.  If it is, probe returns zero and uses
+ *	dev_set_drvdata() to associate driver-specific data with the
+ *	interface.  It may also use usb_set_interface() to specify the
+ *	appropriate altsetting.  If unwilling to manage the interface,
+ *	return a negative errno value.
+ * @disconnect: Called when the interface is no longer accessible, usually
+ *	because its device has been (or is being) disconnected or the
+ *	driver module is being unloaded.
+ * @ioctl: Used for drivers that want to talk to userspace through
+ *	the "usbfs" filesystem.  This lets devices provide ways to
+ *	expose information to user space regardless of where they
+ *	do (or don't) show up otherwise in the filesystem.
+ * @suspend: Called when the device is going to be suspended by the system.
+ * @resume: Called when the device is being resumed by the system.
+ * @id_table: USB drivers use ID table to support hotplugging.
+ *	Export this with MODULE_DEVICE_TABLE(usb,...).  This must be set
+ *	or your driver's probe function will never get called.
+ * @driver: the driver model core driver structure.
+ *
+ * USB drivers must provide a name, probe() and disconnect() methods,
+ * and an id_table.  Other driver fields are optional.
+ *
+ * The id_table is used in hotplugging.  It holds a set of descriptors,
+ * and specialized data may be associated with each entry.  That table
+ * is used by both user and kernel mode hotplugging support.
+ *
+ * The probe() and disconnect() methods are called in a context where
+ * they can sleep, but they should avoid abusing the privilege.  Most
+ * work to connect to a device should be done when the device is opened,
+ * and undone at the last close.  The disconnect code needs to address
+ * concurrency issues with respect to open() and close() methods, as
+ * well as forcing all pending I/O requests to complete (by unlinking
+ * them as necessary, and blocking until the unlinks complete).
+ */
+struct usb_driver {
+	struct module *owner;
+
+	const char *name;
+
+	int (*probe) (struct usb_interface *intf,
+		      const struct usb_device_id *id);
+
+	void (*disconnect) (struct usb_interface *intf);
+
+	int (*ioctl) (struct usb_interface *intf, unsigned int code, void *buf);
+
+	int (*suspend) (struct usb_interface *intf, u32 state);
+	int (*resume) (struct usb_interface *intf);
+
+	const struct usb_device_id *id_table;
+
+	struct device_driver driver;
+};
+#define	to_usb_driver(d) container_of(d, struct usb_driver, driver)
+
+extern struct bus_type usb_bus_type;
+
+/**
+ * struct usb_class_driver - identifies a USB driver that wants to use the USB major number
+ * @name: devfs name for this driver.  Will also be used by the driver
+ *	class code to create a usb class device.
+ * @fops: pointer to the struct file_operations of this driver.
+ * @mode: the mode for the devfs file to be created for this driver.
+ * @minor_base: the start of the minor range for this driver.
+ *
+ * This structure is used for the usb_register_dev() and
+ * usb_unregister_dev() functions, to consolidate a number of the
+ * parameters used for them.
+ */
+struct usb_class_driver {
+	char *name;
+	struct file_operations *fops;
+	mode_t mode;
+	int minor_base;	
+};
+
+/*
+ * use these in module_init()/module_exit()
+ * and don't forget MODULE_DEVICE_TABLE(usb, ...)
+ */
+extern int usb_register(struct usb_driver *);
+extern void usb_deregister(struct usb_driver *);
+
+extern int usb_register_dev(struct usb_interface *intf,
+			    struct usb_class_driver *class_driver);
+extern void usb_deregister_dev(struct usb_interface *intf,
+			       struct usb_class_driver *class_driver);
+
+extern int usb_disabled(void);
+
+/* -------------------------------------------------------------------------- */
+
+/*
+ * URB support, for asynchronous request completions
+ */
+
+/*
+ * urb->transfer_flags:
+ */
+#define URB_SHORT_NOT_OK	0x0001	/* report short reads as errors */
+#define URB_ISO_ASAP		0x0002	/* iso-only, urb->start_frame ignored */
+#define URB_NO_TRANSFER_DMA_MAP	0x0004	/* urb->transfer_dma valid on submit */
+#define URB_NO_SETUP_DMA_MAP	0x0008	/* urb->setup_dma valid on submit */
+#define URB_ASYNC_UNLINK	0x0010	/* usb_unlink_urb() returns asap */
+#define URB_NO_FSBR		0x0020	/* UHCI-specific */
+#define URB_ZERO_PACKET		0x0040	/* Finish bulk OUTs with short packet */
+#define URB_NO_INTERRUPT	0x0080	/* HINT: no non-error interrupt needed */
+
+struct usb_iso_packet_descriptor {
+	unsigned int offset;
+	unsigned int length;		/* expected length */
+	unsigned int actual_length;
+	unsigned int status;
+};
+
+struct urb;
+struct pt_regs;
+
+typedef void (*usb_complete_t)(struct urb *, struct pt_regs *);
+
+/**
+ * struct urb - USB Request Block
+ * @urb_list: For use by current owner of the URB.
+ * @pipe: Holds endpoint number, direction, type, and more.
+ *	Create these values with the eight macros available;
+ *	usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl"
+ *	(control), "bulk", "int" (interrupt), or "iso" (isochronous).
+ *	For example usb_sndbulkpipe() or usb_rcvintpipe().  Endpoint
+ *	numbers range from zero to fifteen.  Note that "in" endpoint two
+ *	is a different endpoint (and pipe) from "out" endpoint two.
+ *	The current configuration controls the existence, type, and
+ *	maximum packet size of any given endpoint.
+ * @dev: Identifies the USB device to perform the request.
+ * @status: This is read in non-iso completion functions to get the
+ *	status of the particular request.  ISO requests only use it
+ *	to tell whether the URB was unlinked; detailed status for
+ *	each frame is in the fields of the iso_frame-desc.
+ * @transfer_flags: A variety of flags may be used to affect how URB
+ *	submission, unlinking, or operation are handled.  Different
+ *	kinds of URB can use different flags.
+ * @transfer_buffer:  This identifies the buffer to (or from) which
+ * 	the I/O request will be performed (unless URB_NO_TRANSFER_DMA_MAP
+ *	is set).  This buffer must be suitable for DMA; allocate it with
+ *	kmalloc() or equivalent.  For transfers to "in" endpoints, contents
+ *	of this buffer will be modified.  This buffer is used for the data
+ *	stage of control transfers.
+ * @transfer_dma: When transfer_flags includes URB_NO_TRANSFER_DMA_MAP,
+ *	the device driver is saying that it provided this DMA address,
+ *	which the host controller driver should use in preference to the
+ *	transfer_buffer.
+ * @transfer_buffer_length: How big is transfer_buffer.  The transfer may
+ *	be broken up into chunks according to the current maximum packet
+ *	size for the endpoint, which is a function of the configuration
+ *	and is encoded in the pipe.  When the length is zero, neither
+ *	transfer_buffer nor transfer_dma is used.
+ * @actual_length: This is read in non-iso completion functions, and
+ *	it tells how many bytes (out of transfer_buffer_length) were
+ *	transferred.  It will normally be the same as requested, unless
+ *	either an error was reported or a short read was performed.
+ *	The URB_SHORT_NOT_OK transfer flag may be used to make such
+ *	short reads be reported as errors. 
+ * @setup_packet: Only used for control transfers, this points to eight bytes
+ *	of setup data.  Control transfers always start by sending this data
+ *	to the device.  Then transfer_buffer is read or written, if needed.
+ * @setup_dma: For control transfers with URB_NO_SETUP_DMA_MAP set, the
+ *	device driver has provided this DMA address for the setup packet.
+ *	The host controller driver should use this in preference to
+ *	setup_packet.
+ * @start_frame: Returns the initial frame for isochronous transfers.
+ * @number_of_packets: Lists the number of ISO transfer buffers.
+ * @interval: Specifies the polling interval for interrupt or isochronous
+ *	transfers.  The units are frames (milliseconds) for for full and low
+ *	speed devices, and microframes (1/8 millisecond) for highspeed ones.
+ * @error_count: Returns the number of ISO transfers that reported errors.
+ * @context: For use in completion functions.  This normally points to
+ *	request-specific driver context.
+ * @complete: Completion handler. This URB is passed as the parameter to the
+ *	completion function.  The completion function may then do what
+ *	it likes with the URB, including resubmitting or freeing it.
+ * @iso_frame_desc: Used to provide arrays of ISO transfer buffers and to 
+ *	collect the transfer status for each buffer.
+ *
+ * This structure identifies USB transfer requests.  URBs must be allocated by
+ * calling usb_alloc_urb() and freed with a call to usb_free_urb().
+ * Initialization may be done using various usb_fill_*_urb() functions.  URBs
+ * are submitted using usb_submit_urb(), and pending requests may be canceled
+ * using usb_unlink_urb() or usb_kill_urb().
+ *
+ * Data Transfer Buffers:
+ *
+ * Normally drivers provide I/O buffers allocated with kmalloc() or otherwise
+ * taken from the general page pool.  That is provided by transfer_buffer
+ * (control requests also use setup_packet), and host controller drivers
+ * perform a dma mapping (and unmapping) for each buffer transferred.  Those
+ * mapping operations can be expensive on some platforms (perhaps using a dma
+ * bounce buffer or talking to an IOMMU),
+ * although they're cheap on commodity x86 and ppc hardware.
+ *
+ * Alternatively, drivers may pass the URB_NO_xxx_DMA_MAP transfer flags,
+ * which tell the host controller driver that no such mapping is needed since
+ * the device driver is DMA-aware.  For example, a device driver might
+ * allocate a DMA buffer with usb_buffer_alloc() or call usb_buffer_map().
+ * When these transfer flags are provided, host controller drivers will
+ * attempt to use the dma addresses found in the transfer_dma and/or
+ * setup_dma fields rather than determining a dma address themselves.  (Note
+ * that transfer_buffer and setup_packet must still be set because not all
+ * host controllers use DMA, nor do virtual root hubs).
+ *
+ * Initialization:
+ *
+ * All URBs submitted must initialize the dev, pipe, transfer_flags (may be
+ * zero), and complete fields.
+ * The URB_ASYNC_UNLINK transfer flag affects later invocations of
+ * the usb_unlink_urb() routine.  Note: Failure to set URB_ASYNC_UNLINK
+ * with usb_unlink_urb() is deprecated.  For synchronous unlinks use
+ * usb_kill_urb() instead.
+ *
+ * All URBs must also initialize 
+ * transfer_buffer and transfer_buffer_length.  They may provide the
+ * URB_SHORT_NOT_OK transfer flag, indicating that short reads are
+ * to be treated as errors; that flag is invalid for write requests.
+ *
+ * Bulk URBs may
+ * use the URB_ZERO_PACKET transfer flag, indicating that bulk OUT transfers
+ * should always terminate with a short packet, even if it means adding an
+ * extra zero length packet.
+ *
+ * Control URBs must provide a setup_packet.  The setup_packet and
+ * transfer_buffer may each be mapped for DMA or not, independently of
+ * the other.  The transfer_flags bits URB_NO_TRANSFER_DMA_MAP and
+ * URB_NO_SETUP_DMA_MAP indicate which buffers have already been mapped.
+ * URB_NO_SETUP_DMA_MAP is ignored for non-control URBs.
+ *
+ * Interrupt URBs must provide an interval, saying how often (in milliseconds
+ * or, for highspeed devices, 125 microsecond units)
+ * to poll for transfers.  After the URB has been submitted, the interval
+ * field reflects how the transfer was actually scheduled.
+ * The polling interval may be more frequent than requested.
+ * For example, some controllers have a maximum interval of 32 milliseconds,
+ * while others support intervals of up to 1024 milliseconds.
+ * Isochronous URBs also have transfer intervals.  (Note that for isochronous
+ * endpoints, as well as high speed interrupt endpoints, the encoding of
+ * the transfer interval in the endpoint descriptor is logarithmic.
+ * Device drivers must convert that value to linear units themselves.)
+ *
+ * Isochronous URBs normally use the URB_ISO_ASAP transfer flag, telling
+ * the host controller to schedule the transfer as soon as bandwidth
+ * utilization allows, and then set start_frame to reflect the actual frame
+ * selected during submission.  Otherwise drivers must specify the start_frame
+ * and handle the case where the transfer can't begin then.  However, drivers
+ * won't know how bandwidth is currently allocated, and while they can
+ * find the current frame using usb_get_current_frame_number () they can't
+ * know the range for that frame number.  (Ranges for frame counter values
+ * are HC-specific, and can go from 256 to 65536 frames from "now".)
+ *
+ * Isochronous URBs have a different data transfer model, in part because
+ * the quality of service is only "best effort".  Callers provide specially
+ * allocated URBs, with number_of_packets worth of iso_frame_desc structures
+ * at the end.  Each such packet is an individual ISO transfer.  Isochronous
+ * URBs are normally queued, submitted by drivers to arrange that
+ * transfers are at least double buffered, and then explicitly resubmitted
+ * in completion handlers, so
+ * that data (such as audio or video) streams at as constant a rate as the
+ * host controller scheduler can support.
+ *
+ * Completion Callbacks:
+ *
+ * The completion callback is made in_interrupt(), and one of the first
+ * things that a completion handler should do is check the status field.
+ * The status field is provided for all URBs.  It is used to report
+ * unlinked URBs, and status for all non-ISO transfers.  It should not
+ * be examined before the URB is returned to the completion handler.
+ *
+ * The context field is normally used to link URBs back to the relevant
+ * driver or request state.
+ *
+ * When the completion callback is invoked for non-isochronous URBs, the
+ * actual_length field tells how many bytes were transferred.  This field
+ * is updated even when the URB terminated with an error or was unlinked.
+ *
+ * ISO transfer status is reported in the status and actual_length fields
+ * of the iso_frame_desc array, and the number of errors is reported in
+ * error_count.  Completion callbacks for ISO transfers will normally
+ * (re)submit URBs to ensure a constant transfer rate.
+ */
+struct urb
+{
+	/* private, usb core and host controller only fields in the urb */
+	struct kref kref;		/* reference count of the URB */
+	spinlock_t lock;		/* lock for the URB */
+	void *hcpriv;			/* private data for host controller */
+	struct list_head urb_list;	/* list pointer to all active urbs */
+	int bandwidth;			/* bandwidth for INT/ISO request */
+	atomic_t use_count;		/* concurrent submissions counter */
+	u8 reject;			/* submissions will fail */
+
+	/* public, documented fields in the urb that can be used by drivers */
+	struct usb_device *dev; 	/* (in) pointer to associated device */
+	unsigned int pipe;		/* (in) pipe information */
+	int status;			/* (return) non-ISO status */
+	unsigned int transfer_flags;	/* (in) URB_SHORT_NOT_OK | ...*/
+	void *transfer_buffer;		/* (in) associated data buffer */
+	dma_addr_t transfer_dma;	/* (in) dma addr for transfer_buffer */
+	int transfer_buffer_length;	/* (in) data buffer length */
+	int actual_length;		/* (return) actual transfer length */
+	unsigned char *setup_packet;	/* (in) setup packet (control only) */
+	dma_addr_t setup_dma;		/* (in) dma addr for setup_packet */
+	int start_frame;		/* (modify) start frame (ISO) */
+	int number_of_packets;		/* (in) number of ISO packets */
+	int interval;			/* (modify) transfer interval (INT/ISO) */
+	int error_count;		/* (return) number of ISO errors */
+	void *context;			/* (in) context for completion */
+	usb_complete_t complete;	/* (in) completion routine */
+	struct usb_iso_packet_descriptor iso_frame_desc[0];	/* (in) ISO ONLY */
+};
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * usb_fill_control_urb - initializes a control urb
+ * @urb: pointer to the urb to initialize.
+ * @dev: pointer to the struct usb_device for this urb.
+ * @pipe: the endpoint pipe
+ * @setup_packet: pointer to the setup_packet buffer
+ * @transfer_buffer: pointer to the transfer buffer
+ * @buffer_length: length of the transfer buffer
+ * @complete: pointer to the usb_complete_t function
+ * @context: what to set the urb context to.
+ *
+ * Initializes a control urb with the proper information needed to submit
+ * it to a device.
+ */
+static inline void usb_fill_control_urb (struct urb *urb,
+					 struct usb_device *dev,
+					 unsigned int pipe,
+					 unsigned char *setup_packet,
+					 void *transfer_buffer,
+					 int buffer_length,
+					 usb_complete_t complete,
+					 void *context)
+{
+	spin_lock_init(&urb->lock);
+	urb->dev = dev;
+	urb->pipe = pipe;
+	urb->setup_packet = setup_packet;
+	urb->transfer_buffer = transfer_buffer;
+	urb->transfer_buffer_length = buffer_length;
+	urb->complete = complete;
+	urb->context = context;
+}
+
+/**
+ * usb_fill_bulk_urb - macro to help initialize a bulk urb
+ * @urb: pointer to the urb to initialize.
+ * @dev: pointer to the struct usb_device for this urb.
+ * @pipe: the endpoint pipe
+ * @transfer_buffer: pointer to the transfer buffer
+ * @buffer_length: length of the transfer buffer
+ * @complete: pointer to the usb_complete_t function
+ * @context: what to set the urb context to.
+ *
+ * Initializes a bulk urb with the proper information needed to submit it
+ * to a device.
+ */
+static inline void usb_fill_bulk_urb (struct urb *urb,
+				      struct usb_device *dev,
+				      unsigned int pipe,
+				      void *transfer_buffer,
+				      int buffer_length,
+				      usb_complete_t complete,
+				      void *context)
+{
+	spin_lock_init(&urb->lock);
+	urb->dev = dev;
+	urb->pipe = pipe;
+	urb->transfer_buffer = transfer_buffer;
+	urb->transfer_buffer_length = buffer_length;
+	urb->complete = complete;
+	urb->context = context;
+}
+
+/**
+ * usb_fill_int_urb - macro to help initialize a interrupt urb
+ * @urb: pointer to the urb to initialize.
+ * @dev: pointer to the struct usb_device for this urb.
+ * @pipe: the endpoint pipe
+ * @transfer_buffer: pointer to the transfer buffer
+ * @buffer_length: length of the transfer buffer
+ * @complete: pointer to the usb_complete_t function
+ * @context: what to set the urb context to.
+ * @interval: what to set the urb interval to, encoded like
+ *	the endpoint descriptor's bInterval value.
+ *
+ * Initializes a interrupt urb with the proper information needed to submit
+ * it to a device.
+ * Note that high speed interrupt endpoints use a logarithmic encoding of
+ * the endpoint interval, and express polling intervals in microframes
+ * (eight per millisecond) rather than in frames (one per millisecond).
+ */
+static inline void usb_fill_int_urb (struct urb *urb,
+				     struct usb_device *dev,
+				     unsigned int pipe,
+				     void *transfer_buffer,
+				     int buffer_length,
+				     usb_complete_t complete,
+				     void *context,
+				     int interval)
+{
+	spin_lock_init(&urb->lock);
+	urb->dev = dev;
+	urb->pipe = pipe;
+	urb->transfer_buffer = transfer_buffer;
+	urb->transfer_buffer_length = buffer_length;
+	urb->complete = complete;
+	urb->context = context;
+	if (dev->speed == USB_SPEED_HIGH)
+		urb->interval = 1 << (interval - 1);
+	else
+		urb->interval = interval;
+	urb->start_frame = -1;
+}
+
+extern void usb_init_urb(struct urb *urb);
+extern struct urb *usb_alloc_urb(int iso_packets, int mem_flags);
+extern void usb_free_urb(struct urb *urb);
+#define usb_put_urb usb_free_urb
+extern struct urb *usb_get_urb(struct urb *urb);
+extern int usb_submit_urb(struct urb *urb, int mem_flags);
+extern int usb_unlink_urb(struct urb *urb);
+extern void usb_kill_urb(struct urb *urb);
+
+#define HAVE_USB_BUFFERS
+void *usb_buffer_alloc (struct usb_device *dev, size_t size,
+	int mem_flags, dma_addr_t *dma);
+void usb_buffer_free (struct usb_device *dev, size_t size,
+	void *addr, dma_addr_t dma);
+
+#if 0
+struct urb *usb_buffer_map (struct urb *urb);
+void usb_buffer_dmasync (struct urb *urb);
+void usb_buffer_unmap (struct urb *urb);
+#endif
+
+struct scatterlist;
+int usb_buffer_map_sg (struct usb_device *dev, unsigned pipe,
+		struct scatterlist *sg, int nents);
+#if 0
+void usb_buffer_dmasync_sg (struct usb_device *dev, unsigned pipe,
+		struct scatterlist *sg, int n_hw_ents);
+#endif
+void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe,
+		struct scatterlist *sg, int n_hw_ents);
+
+/*-------------------------------------------------------------------*
+ *                         SYNCHRONOUS CALL SUPPORT                  *
+ *-------------------------------------------------------------------*/
+
+extern int usb_control_msg(struct usb_device *dev, unsigned int pipe,
+	__u8 request, __u8 requesttype, __u16 value, __u16 index,
+	void *data, __u16 size, int timeout);
+extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
+	void *data, int len, int *actual_length,
+	int timeout);
+
+/* selective suspend/resume */
+extern int usb_suspend_device(struct usb_device *dev, u32 state);
+extern int usb_resume_device(struct usb_device *dev);
+
+
+/* wrappers around usb_control_msg() for the most common standard requests */
+extern int usb_get_descriptor(struct usb_device *dev, unsigned char desctype,
+	unsigned char descindex, void *buf, int size);
+extern int usb_get_status(struct usb_device *dev,
+	int type, int target, void *data);
+extern int usb_get_string(struct usb_device *dev,
+	unsigned short langid, unsigned char index, void *buf, int size);
+extern int usb_string(struct usb_device *dev, int index,
+	char *buf, size_t size);
+
+/* wrappers that also update important state inside usbcore */
+extern int usb_clear_halt(struct usb_device *dev, int pipe);
+extern int usb_reset_configuration(struct usb_device *dev);
+extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate);
+
+/*
+ * timeouts, in milliseconds, used for sending/receiving control messages
+ * they typically complete within a few frames (msec) after they're issued
+ * USB identifies 5 second timeouts, maybe more in a few cases, and a few
+ * slow devices (like some MGE Ellipse UPSes) actually push that limit.
+ */
+#define USB_CTRL_GET_TIMEOUT	5000
+#define USB_CTRL_SET_TIMEOUT	5000
+
+
+/**
+ * struct usb_sg_request - support for scatter/gather I/O
+ * @status: zero indicates success, else negative errno
+ * @bytes: counts bytes transferred.
+ *
+ * These requests are initialized using usb_sg_init(), and then are used
+ * as request handles passed to usb_sg_wait() or usb_sg_cancel().  Most
+ * members of the request object aren't for driver access.
+ *
+ * The status and bytecount values are valid only after usb_sg_wait()
+ * returns.  If the status is zero, then the bytecount matches the total
+ * from the request.
+ *
+ * After an error completion, drivers may need to clear a halt condition
+ * on the endpoint.
+ */
+struct usb_sg_request {
+	int			status;
+	size_t			bytes;
+
+	/* 
+	 * members below are private to usbcore,
+	 * and are not provided for driver access!
+	 */
+	spinlock_t		lock;
+
+	struct usb_device	*dev;
+	int			pipe;
+	struct scatterlist	*sg;
+	int			nents;
+
+	int			entries;
+	struct urb		**urbs;
+
+	int			count;
+	struct completion	complete;
+};
+
+int usb_sg_init (
+	struct usb_sg_request	*io,
+	struct usb_device	*dev,
+	unsigned		pipe, 
+	unsigned		period,
+	struct scatterlist	*sg,
+	int			nents,
+	size_t			length,
+	int			mem_flags
+);
+void usb_sg_cancel (struct usb_sg_request *io);
+void usb_sg_wait (struct usb_sg_request *io);
+
+
+/* -------------------------------------------------------------------------- */
+
+/*
+ * For various legacy reasons, Linux has a small cookie that's paired with
+ * a struct usb_device to identify an endpoint queue.  Queue characteristics
+ * are defined by the endpoint's descriptor.  This cookie is called a "pipe",
+ * an unsigned int encoded as:
+ *
+ *  - direction:	bit 7		(0 = Host-to-Device [Out],
+ *					 1 = Device-to-Host [In] ...
+ *					like endpoint bEndpointAddress)
+ *  - device address:	bits 8-14       ... bit positions known to uhci-hcd
+ *  - endpoint:		bits 15-18      ... bit positions known to uhci-hcd
+ *  - pipe type:	bits 30-31	(00 = isochronous, 01 = interrupt,
+ *					 10 = control, 11 = bulk)
+ *
+ * Given the device address and endpoint descriptor, pipes are redundant.
+ */
+
+/* NOTE:  these are not the standard USB_ENDPOINT_XFER_* values!! */
+/* (yet ... they're the values used by usbfs) */
+#define PIPE_ISOCHRONOUS		0
+#define PIPE_INTERRUPT			1
+#define PIPE_CONTROL			2
+#define PIPE_BULK			3
+
+#define usb_pipein(pipe)	((pipe) & USB_DIR_IN)
+#define usb_pipeout(pipe)	(!usb_pipein(pipe))
+
+#define usb_pipedevice(pipe)	(((pipe) >> 8) & 0x7f)
+#define usb_pipeendpoint(pipe)	(((pipe) >> 15) & 0xf)
+
+#define usb_pipetype(pipe)	(((pipe) >> 30) & 3)
+#define usb_pipeisoc(pipe)	(usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
+#define usb_pipeint(pipe)	(usb_pipetype((pipe)) == PIPE_INTERRUPT)
+#define usb_pipecontrol(pipe)	(usb_pipetype((pipe)) == PIPE_CONTROL)
+#define usb_pipebulk(pipe)	(usb_pipetype((pipe)) == PIPE_BULK)
+
+/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
+#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
+#define	usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << (ep)))
+#define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | ((bit) << (ep)))
+
+
+static inline unsigned int __create_pipe(struct usb_device *dev, unsigned int endpoint)
+{
+	return (dev->devnum << 8) | (endpoint << 15);
+}
+
+/* Create various pipes... */
+#define usb_sndctrlpipe(dev,endpoint)	((PIPE_CONTROL << 30) | __create_pipe(dev,endpoint))
+#define usb_rcvctrlpipe(dev,endpoint)	((PIPE_CONTROL << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
+#define usb_sndisocpipe(dev,endpoint)	((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev,endpoint))
+#define usb_rcvisocpipe(dev,endpoint)	((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
+#define usb_sndbulkpipe(dev,endpoint)	((PIPE_BULK << 30) | __create_pipe(dev,endpoint))
+#define usb_rcvbulkpipe(dev,endpoint)	((PIPE_BULK << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
+#define usb_sndintpipe(dev,endpoint)	((PIPE_INTERRUPT << 30) | __create_pipe(dev,endpoint))
+#define usb_rcvintpipe(dev,endpoint)	((PIPE_INTERRUPT << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
+
+/*-------------------------------------------------------------------------*/
+
+static inline __u16
+usb_maxpacket(struct usb_device *udev, int pipe, int is_out)
+{
+	struct usb_host_endpoint	*ep;
+	unsigned			epnum = usb_pipeendpoint(pipe);
+
+	if (is_out) {
+		WARN_ON(usb_pipein(pipe));
+		ep = udev->ep_out[epnum];
+	} else {
+		WARN_ON(usb_pipeout(pipe));
+		ep = udev->ep_in[epnum];
+	}
+	if (!ep)
+		return 0;
+
+	/* NOTE:  only 0x07ff bits are for packet size... */
+	return le16_to_cpu(ep->desc.wMaxPacketSize);
+}
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef DEBUG
+#define dbg(format, arg...) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg)
+#else
+#define dbg(format, arg...) do {} while (0)
+#endif
+
+#define err(format, arg...) printk(KERN_ERR "%s: " format "\n" , __FILE__ , ## arg)
+#define info(format, arg...) printk(KERN_INFO "%s: " format "\n" , __FILE__ , ## arg)
+#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n" , __FILE__ , ## arg)
+
+
+#endif  /* __KERNEL__ */
+
+#endif