/include/linux/usb.h
C Header | 1217 lines | 454 code | 124 blank | 639 comment | 2 complexity | 89a9edc9b43526f84ca8c91184de710b MD5 | raw file
- #ifndef __LINUX_USB_H
- #define __LINUX_USB_H
- #include <linux/mod_devicetable.h>
- #include <linux/usb/ch9.h>
- #define USB_MAJOR 180
- #define USB_DEVICE_MAJOR 189
- #ifdef __KERNEL__
- #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 */
- #include <linux/mutex.h> /* for struct mutex */
- #include <linux/pm_runtime.h> /* for runtime PM */
- struct usb_device;
- struct usb_driver;
- struct wusb_dev;
- /*-------------------------------------------------------------------------*/
- /*
- * 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.
- * - a SuperSpeed endpoint has a companion descriptor
- *
- * And there might be other descriptors mixed in with those.
- *
- * Devices may also have class-specific or vendor-specific descriptors.
- */
- struct ep_device;
- /**
- * struct usb_host_endpoint - host-side endpoint descriptor and queue
- * @desc: descriptor for this endpoint, wMaxPacketSize in native byteorder
- * @ss_ep_comp: SuperSpeed companion descriptor for this endpoint
- * @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
- * @ep_dev: ep_device for sysfs info
- * @extra: descriptors following this endpoint in the configuration
- * @extralen: how many bytes of "extra" are valid
- * @enabled: URBs may be submitted to this endpoint
- *
- * 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 usb_ss_ep_comp_descriptor ss_ep_comp;
- struct list_head urb_list;
- void *hcpriv;
- struct ep_device *ep_dev; /* For sysfs info */
- unsigned char *extra; /* Extra descriptors */
- int extralen;
- int enabled;
- };
- /* 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.
- * @cur_altsetting: the current altsetting.
- * @num_altsetting: number of altsettings defined.
- * @intf_assoc: interface association descriptor
- * @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())
- * @sysfs_files_created: sysfs attributes exist
- * @ep_devs_created: endpoint child pseudo-devices exist
- * @unregistering: flag set when the interface is being unregistered
- * @needs_remote_wakeup: flag set when the driver requires remote-wakeup
- * capability during autosuspend.
- * @needs_altsetting0: flag set when a set-interface request for altsetting 0
- * has been deferred.
- * @needs_binding: flag set when the driver should be re-probed or unbound
- * following a reset or suspend operation it doesn't support.
- * @dev: driver model's view of this device
- * @usb_dev: if an interface is bound to the USB major, this will point
- * to the sysfs representation for that device.
- * @pm_usage_cnt: PM usage counter for this interface
- * @reset_ws: Used for scheduling resets from atomic context.
- * @reset_running: set to 1 if the interface is currently running a
- * queued reset so that usb_cancel_queued_reset() doesn't try to
- * remove from the workqueue when running inside the worker
- * thread. See __usb_queue_reset_device().
- * @resetting_device: USB core reset the device, so use alt setting 0 as
- * current; needs bandwidth alloc after reset.
- *
- * 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 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 */
- /* If there is an interface association descriptor then it will list
- * the associated interfaces */
- struct usb_interface_assoc_descriptor *intf_assoc;
- int minor; /* minor number this interface is
- * bound to */
- enum usb_interface_condition condition; /* state of binding */
- unsigned sysfs_files_created:1; /* the sysfs attributes exist */
- unsigned ep_devs_created:1; /* endpoint "devices" exist */
- unsigned unregistering:1; /* unregistration is in progress */
- unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */
- unsigned needs_altsetting0:1; /* switch to altsetting 0 is pending */
- unsigned needs_binding:1; /* needs delayed unbind/rebind */
- unsigned reset_running:1;
- unsigned resetting_device:1; /* true: bandwidth alloc after reset */
- struct device dev; /* interface specific device info */
- struct device *usb_dev;
- atomic_t pm_usage_cnt; /* usage counter for autosuspend */
- struct work_struct reset_ws; /* for resets in atomic context */
- };
- #define to_usb_interface(d) container_of(d, struct usb_interface, 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
- #define USB_MAXIADS (USB_MAXINTERFACES/2)
- /**
- * 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.
- * @intf_assoc: list of any interface association descriptors in this config
- * @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 userspace tools). 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; /* iConfiguration string, if present */
- /* List of any Interface Association Descriptors in this
- * configuration. */
- struct usb_interface_assoc_descriptor *intf_assoc[USB_MAXIADS];
- /* 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)
- /* ----------------------------------------------------------------------- */
- /* 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) */
- const char *bus_name; /* stable id (PCI slot_name etc) */
- u8 uses_dma; /* Does the host controller use DMA? */
- u8 uses_pio_for_control; /*
- * Does the host controller use PIO
- * for control transfers?
- */
- 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? */
- unsigned sg_tablesize; /* 0 or largest number of sg list entries */
- int devnum_next; /* Next open device number in
- * round-robin allocation */
- struct usb_devmap devmap; /* device address allocation map */
- struct usb_device *root_hub; /* Root hub */
- struct usb_bus *hs_companion; /* Companion EHCI bus, if any */
- struct list_head bus_list; /* list of busses */
- 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 */
- #ifdef CONFIG_USB_DEVICEFS
- struct dentry *usbfs_dentry; /* usbfs dentry entry for the bus */
- #endif
- #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
- };
- /* ----------------------------------------------------------------------- */
- /* 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.
- *
- * Current Wireless USB host hardware (Intel i1480 for example) allows
- * up to 22 devices to connect. Upcoming hardware might raise that
- * limit. Because the arrays need to add a bit for hub status data, we
- * do 31, so plus one evens out to four bytes.
- */
- #define USB_MAXCHILDREN (31)
- struct usb_tt;
- /**
- * struct usb_device - kernel's representation of a USB device
- * @devnum: device number; address on a USB bus
- * @devpath: device ID string for use in messages (e.g., /port/...)
- * @route: tree topology hex string for use with xHCI
- * @state: device state: configured, not attached, etc.
- * @speed: device speed: high/full/low (or error)
- * @tt: Transaction Translator info; used with low/full speed dev, highspeed hub
- * @ttport: device port on that tt hub
- * @toggle: one bit for each endpoint, with ([0] = IN, [1] = OUT) endpoints
- * @parent: our hub, unless we're the root
- * @bus: bus we're part of
- * @ep0: endpoint 0 data (default control pipe)
- * @dev: generic device interface
- * @descriptor: USB device descriptor
- * @config: all of the device's configs
- * @actconfig: the active configuration
- * @ep_in: array of IN endpoints
- * @ep_out: array of OUT endpoints
- * @rawdescriptors: raw descriptors for each config
- * @bus_mA: Current available from the bus
- * @portnum: parent port number (origin 1)
- * @level: number of USB hub ancestors
- * @can_submit: URBs may be submitted
- * @persist_enabled: USB_PERSIST enabled for this device
- * @have_langid: whether string_langid is valid
- * @authorized: policy has said we can use it;
- * (user space) policy determines if we authorize this device to be
- * used or not. By default, wired USB devices are authorized.
- * WUSB devices are not, until we authorize them from user space.
- * FIXME -- complete doc
- * @authenticated: Crypto authentication passed
- * @wusb: device is Wireless USB
- * @string_langid: language ID for strings
- * @product: iProduct string, if present (static)
- * @manufacturer: iManufacturer string, if present (static)
- * @serial: iSerialNumber string, if present (static)
- * @filelist: usbfs files that are open to this device
- * @usb_classdev: USB class device that was created for usbfs device
- * access from userspace
- * @usbfs_dentry: usbfs dentry entry for the device
- * @maxchild: number of ports if hub
- * @children: child devices - USB devices that are attached to this hub
- * @quirks: quirks of the whole device
- * @urbnum: number of URBs submitted for the whole device
- * @active_duration: total time device is not suspended
- * @connect_time: time device was first connected
- * @do_remote_wakeup: remote wakeup should be enabled
- * @reset_resume: needs reset instead of resume
- * @wusb_dev: if this is a Wireless USB device, link to the WUSB
- * specific data for the device.
- * @slot_id: Slot ID assigned by xHCI
- *
- * Notes:
- * Usbcore drivers should not set usbdev->state directly. Instead use
- * usb_set_device_state().
- */
- struct usb_device {
- int devnum;
- char devpath[16];
- u32 route;
- enum usb_device_state state;
- enum usb_device_speed speed;
- struct usb_tt *tt;
- int ttport;
- unsigned int toggle[2];
- struct usb_device *parent;
- struct usb_bus *bus;
- struct usb_host_endpoint ep0;
- struct device dev;
- struct usb_device_descriptor descriptor;
- struct usb_host_config *config;
- struct usb_host_config *actconfig;
- struct usb_host_endpoint *ep_in[16];
- struct usb_host_endpoint *ep_out[16];
- char **rawdescriptors;
- unsigned short bus_mA;
- u8 portnum;
- u8 level;
- unsigned can_submit:1;
- unsigned persist_enabled:1;
- unsigned have_langid:1;
- unsigned authorized:1;
- unsigned authenticated:1;
- unsigned wusb:1;
- int string_langid;
- /* static strings from the device */
- char *product;
- char *manufacturer;
- char *serial;
- struct list_head filelist;
- #ifdef CONFIG_USB_DEVICE_CLASS
- struct device *usb_classdev;
- #endif
- #ifdef CONFIG_USB_DEVICEFS
- struct dentry *usbfs_dentry;
- #endif
- int maxchild;
- struct usb_device *children[USB_MAXCHILDREN];
- u32 quirks;
- atomic_t urbnum;
- unsigned long active_duration;
- #ifdef CONFIG_PM
- unsigned long connect_time;
- unsigned do_remote_wakeup:1;
- unsigned reset_resume:1;
- #endif
- struct wusb_dev *wusb_dev;
- int slot_id;
- };
- #define to_usb_device(d) container_of(d, struct usb_device, dev)
- static inline struct usb_device *interface_to_usbdev(struct usb_interface *intf)
- {
- return to_usb_device(intf->dev.parent);
- }
- extern struct usb_device *usb_get_dev(struct usb_device *dev);
- extern void usb_put_dev(struct usb_device *dev);
- /* USB device locking */
- #define usb_lock_device(udev) device_lock(&(udev)->dev)
- #define usb_unlock_device(udev) device_unlock(&(udev)->dev)
- #define usb_trylock_device(udev) device_trylock(&(udev)->dev)
- extern int usb_lock_device_for_reset(struct usb_device *udev,
- const struct usb_interface *iface);
- /* USB port reset for device reinitialization */
- extern int usb_reset_device(struct usb_device *dev);
- extern void usb_queue_reset_device(struct usb_interface *dev);
- /* USB autosuspend and autoresume */
- #ifdef CONFIG_USB_SUSPEND
- extern void usb_enable_autosuspend(struct usb_device *udev);
- extern void usb_disable_autosuspend(struct usb_device *udev);
- extern int usb_autopm_get_interface(struct usb_interface *intf);
- extern void usb_autopm_put_interface(struct usb_interface *intf);
- extern int usb_autopm_get_interface_async(struct usb_interface *intf);
- extern void usb_autopm_put_interface_async(struct usb_interface *intf);
- extern void usb_autopm_get_interface_no_resume(struct usb_interface *intf);
- extern void usb_autopm_put_interface_no_suspend(struct usb_interface *intf);
- static inline void usb_mark_last_busy(struct usb_device *udev)
- {
- pm_runtime_mark_last_busy(&udev->dev);
- }
- #else
- static inline int usb_enable_autosuspend(struct usb_device *udev)
- { return 0; }
- static inline int usb_disable_autosuspend(struct usb_device *udev)
- { return 0; }
- static inline int usb_autopm_get_interface(struct usb_interface *intf)
- { return 0; }
- static inline int usb_autopm_get_interface_async(struct usb_interface *intf)
- { return 0; }
- static inline void usb_autopm_put_interface(struct usb_interface *intf)
- { }
- static inline void usb_autopm_put_interface_async(struct usb_interface *intf)
- { }
- static inline void usb_autopm_get_interface_no_resume(
- struct usb_interface *intf)
- { }
- static inline void usb_autopm_put_interface_no_suspend(
- struct usb_interface *intf)
- { }
- static inline void usb_mark_last_busy(struct usb_device *udev)
- { }
- #endif
- /*-------------------------------------------------------------------------*/
- /* for drivers using iso endpoints */
- extern int usb_get_current_frame_number(struct usb_device *usb_dev);
- /* Sets up a group of bulk endpoints to support multiple stream IDs. */
- extern int usb_alloc_streams(struct usb_interface *interface,
- struct usb_host_endpoint **eps, unsigned int num_eps,
- unsigned int num_streams, gfp_t mem_flags);
- /* Reverts a group of bulk endpoints back to not using stream IDs. */
- extern void usb_free_streams(struct usb_interface *interface,
- struct usb_host_endpoint **eps, unsigned int num_eps,
- gfp_t mem_flags);
- /* 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 int usb_match_one_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(const struct usb_device *dev,
- unsigned ifnum);
- extern struct usb_host_interface *usb_altnum_to_altsetting(
- const struct usb_interface *intf, unsigned int altnum);
- extern struct usb_host_interface *usb_find_alt_setting(
- struct usb_host_config *config,
- unsigned int iface_num,
- unsigned int alt_num);
- /**
- * 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 identifiers;
- * 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 - 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_INTERFACE_PROTOCOL - describe a usb device with a specific interface protocol
- * @vend: the 16 bit USB Vendor ID
- * @prod: the 16 bit USB Product ID
- * @pr: bInterfaceProtocol value
- *
- * This macro is used to create a struct usb_device_id that matches a
- * specific interface protocol of devices.
- */
- #define USB_DEVICE_INTERFACE_PROTOCOL(vend, prod, pr) \
- .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
- USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
- .idVendor = (vend), \
- .idProduct = (prod), \
- .bInterfaceProtocol = (pr)
- /**
- * 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)
- /**
- * USB_DEVICE_AND_INTERFACE_INFO - describe a specific usb device with a class of usb interfaces
- * @vend: the 16 bit USB Vendor ID
- * @prod: the 16 bit USB Product ID
- * @cl: bInterfaceClass value
- * @sc: bInterfaceSubClass value
- * @pr: bInterfaceProtocol value
- *
- * This macro is used to create a struct usb_device_id that matches a
- * specific device with a specific class of interfaces.
- *
- * This is especially useful when explicitly matching devices that have
- * vendor specific bDeviceClass values, but standards-compliant interfaces.
- */
- #define USB_DEVICE_AND_INTERFACE_INFO(vend, prod, cl, sc, pr) \
- .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \
- | USB_DEVICE_ID_MATCH_DEVICE, \
- .idVendor = (vend), \
- .idProduct = (prod), \
- .bInterfaceClass = (cl), \
- .bInterfaceSubClass = (sc), \
- .bInterfaceProtocol = (pr)
- /* ----------------------------------------------------------------------- */
- /* Stuff for dynamic usb ids */
- struct usb_dynids {
- spinlock_t lock;
- struct list_head list;
- };
- struct usb_dynid {
- struct list_head node;
- struct usb_device_id id;
- };
- extern ssize_t usb_store_new_id(struct usb_dynids *dynids,
- struct device_driver *driver,
- const char *buf, size_t count);
- /**
- * struct usbdrv_wrap - wrapper for driver-model structure
- * @driver: The driver-model core driver structure.
- * @for_devices: Non-zero for device drivers, 0 for interface drivers.
- */
- struct usbdrv_wrap {
- struct device_driver driver;
- int for_devices;
- };
- /**
- * struct usb_driver - identifies USB interface driver to usbcore
- * @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
- * usb_set_intfdata() 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 -ENODEV, if genuine IO errors occurred, an appropriate
- * 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.
- * @unlocked_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.
- * @reset_resume: Called when the suspended device has been reset instead
- * of being resumed.
- * @pre_reset: Called by usb_reset_device() when the device is about to be
- * reset. This routine must not return until the driver has no active
- * URBs for the device, and no more URBs may be submitted until the
- * post_reset method is called.
- * @post_reset: Called by usb_reset_device() after the device
- * has been reset
- * @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.
- * @dynids: used internally to hold the list of dynamically added device
- * ids for this driver.
- * @drvwrap: Driver-model core structure wrapper.
- * @no_dynamic_id: if set to 1, the USB core will not allow dynamic ids to be
- * added to this driver by preventing the sysfs file from being created.
- * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend
- * for interfaces bound to this driver.
- * @soft_unbind: if set to 1, the USB core will not kill URBs and disable
- * endpoints before calling the driver's disconnect method.
- *
- * USB interface 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 {
- const char *name;
- int (*probe) (struct usb_interface *intf,
- const struct usb_device_id *id);
- void (*disconnect) (struct usb_interface *intf);
- int (*unlocked_ioctl) (struct usb_interface *intf, unsigned int code,
- void *buf);
- int (*suspend) (struct usb_interface *intf, pm_message_t message);
- int (*resume) (struct usb_interface *intf);
- int (*reset_resume)(struct usb_interface *intf);
- int (*pre_reset)(struct usb_interface *intf);
- int (*post_reset)(struct usb_interface *intf);
- const struct usb_device_id *id_table;
- struct usb_dynids dynids;
- struct usbdrv_wrap drvwrap;
- unsigned int no_dynamic_id:1;
- unsigned int supports_autosuspend:1;
- unsigned int soft_unbind:1;
- };
- #define to_usb_driver(d) container_of(d, struct usb_driver, drvwrap.driver)
- /**
- * struct usb_device_driver - identifies USB device driver to usbcore
- * @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
- * device. If it is, probe returns zero and uses dev_set_drvdata()
- * to associate driver-specific data with the device. If unwilling
- * to manage the device, return a negative errno value.
- * @disconnect: Called when the device is no longer accessible, usually
- * because it has been (or is being) disconnected or the driver's
- * module is being unloaded.
- * @suspend: Called when the device is going to be suspended by the system.
- * @resume: Called when the device is being resumed by the system.
- * @drvwrap: Driver-model core structure wrapper.
- * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend
- * for devices bound to this driver.
- *
- * USB drivers must provide all the fields listed above except drvwrap.
- */
- struct usb_device_driver {
- const char *name;
- int (*probe) (struct usb_device *udev);
- void (*disconnect) (struct usb_device *udev);
- int (*suspend) (struct usb_device *udev, pm_message_t message);
- int (*resume) (struct usb_device *udev, pm_message_t message);
- struct usbdrv_wrap drvwrap;
- unsigned int supports_autosuspend:1;
- };
- #define to_usb_device_driver(d) container_of(d, struct usb_device_driver, \
- drvwrap.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: the usb class device name for this driver. Will show up in sysfs.
- * @devnode: Callback to provide a naming hint for a possible
- * device node to create.
- * @fops: pointer to the struct file_operations of 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;
- char *(*devnode)(struct device *dev, mode_t *mode);
- const struct file_operations *fops;
- int minor_base;
- };
- /*
- * use these in module_init()/module_exit()
- * and don't forget MODULE_DEVICE_TABLE(usb, ...)
- */
- extern int usb_register_driver(struct usb_driver *, struct module *,
- const char *);
- static inline int usb_register(struct usb_driver *driver)
- {
- return usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
- }
- extern void usb_deregister(struct usb_driver *);
- extern int usb_register_device_driver(struct usb_device_driver *,
- struct module *);
- extern void usb_deregister_device_driver(struct usb_device_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:
- *
- * Note: URB_DIR_IN/OUT is automatically set in usb_submit_urb().
- */
- #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_FSBR 0x0020 /* UHCI-specific */
- #define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short packet */
- #define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt
- * needed */
- #define URB_FREE_BUFFER 0x0100 /* Free transfer buffer with the URB */
- /* The following flags are used internally by usbcore and HCDs */
- #define URB_DIR_IN 0x0200 /* Transfer from device to host */
- #define URB_DIR_OUT 0
- #define URB_DIR_MASK URB_DIR_IN
- #define URB_DMA_MAP_SINGLE 0x00010000 /* Non-scatter-gather mapping */
- #define URB_DMA_MAP_PAGE 0x00020000 /* HCD-unsupported S-G */
- #define URB_DMA_MAP_SG 0x00040000 /* HCD-supported S-G */
- #define URB_MAP_LOCAL 0x00080000 /* HCD-local-memory mapping */
- #define URB_SETUP_MAP_SINGLE 0x00100000 /* Setup packet DMA mapped */
- #define URB_SETUP_MAP_LOCAL 0x00200000 /* HCD-local setup packet */
- #define URB_DMA_SG_COMBINED 0x00400000 /* S-G entries were combined */
- #define URB_ALIGNED_TEMP_BUFFER 0x00800000 /* Temp buffer was alloc'd */
- struct usb_iso_packet_descriptor {
- unsigned int offset;
- unsigned int length; /* expected length */
- unsigned int actual_length;
- int status;
- };
- struct urb;
- struct usb_anchor {
- struct list_head urb_list;
- wait_queue_head_t wait;
- spinlock_t lock;
- unsigned int poisoned:1;
- };
- static inline void init_usb_anchor(struct usb_anchor *anchor)
- {
- INIT_LIST_HEAD(&anchor->urb_list);
- init_waitqueue_head(&anchor->wait);
- spin_lock_init(&anchor->lock);
- }
- typedef void (*usb_complete_t)(struct urb *);
- /**
- * struct urb - USB Request Block
- * @urb_list: For use by current owner of the URB.
- * @anchor_list: membership in the list of an anchor
- * @anchor: to anchor URBs to a common mooring
- * @ep: Points to the endpoint's data structure. Will eventually
- * replace @pipe.
- * @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.
- * @stream_id: the endpoint's stream ID for bulk streams
- * @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
- * (however, do not leave garbage in transfer_buffer even then).
- * 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.
- * @sg: scatter gather buffer list
- * @num_sgs: number of entries in the sg list
- * @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: DMA pointer for the setup packet. The caller must not use
- * this field; setup_packet must point to a valid buffer.
- * @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 full and low
- * speed devices, and microframes (1/8 millisecond) for highspeed
- * and SuperSpeed devices.
- * @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_TRANSFER_DMA_MAP transfer flag,
- * which tells the host controller driver that no such mapping is needed for
- * the transfer_buffer since
- * the device driver is DMA-aware. For example, a device driver might
- * allocate a DMA buffer with usb_alloc_coherent() or call usb_buffer_map().
- * When this transfer flag is provided, host controller drivers will
- * attempt to use the dma address found in the transfer_dma
- * field rather than determining a dma address themselves.
- *
- * Note that transfer_buffer must still be set if the controller
- * does not support DMA (as indicated by bus.uses_dma) and when talking
- * to root hub. If you have to trasfer between highmem zone and the device
- * on such controller, create a bounce buffer or bail out with an error.
- * If transfer_buffer cannot be set (is in highmem) and the controller is DMA
- * capable, assign NULL to it, so that usbmon knows not to use the value.
- * The setup_packet must always be set, so it cannot be located in highmem.
- *
- * Initialization:
- *
- * All URBs submitted must initialize the dev, pipe, transfer_flags (may be
- * zero), and complete fields. 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 valid pointer in the setup_packet field.
- * Unlike the transfer_buffer, the setup_packet may not be mapped for DMA
- * beforehand.
- *
- * 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.
- *
- * Note that even fields marked "public" should not be touched by the driver
- * when the urb is owned by the hcd, that is, since the call to
- * usb_submit_urb() till the entry into the completion routine.
- */
- struct urb {
- /* private: usb core and host controller only fields in the urb */
- struct kref kref; /* reference count of the URB */
- void *hcpriv; /* private data for host controller */
- atomic_t use_count; /* concurrent submissions counter */
- atomic_t reject; /* submissions will fail */
- int unlinked; /* unlink error code */
- /* public: documented fields in the urb that can be used by drivers */
- struct list_head urb_list; /* list head for use by the urb's
- * current owner */
- struct list_head anchor_list; /* the URB may be anchored */
- struct usb_anchor *anchor;
- struct usb_device *dev; /* (in) pointer to associated device */
- struct usb_host_endpoint *ep; /* (internal) pointer to endpoint */
- unsigned int pipe; /* (in) pipe information */
- unsigned int stream_id; /* (in) stream ID */
- 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 */
- struct scatterlist *sg; /* (in) scatter gather buffer list */
- int num_sgs; /* (in) number of entries in the sg list */
- u32 transfer_buffer_length; /* (in) data buffer length */
- u32 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_d