/*
- * drivers/usb/usb.c
+ * drivers/usb/core/usb.c
*
* (C) Copyright Linus Torvalds 1999
* (C) Copyright Johannes Erdfelt 1999-2001
* are evil.
*/
-#include <linux/config.h>
-
-#ifdef CONFIG_USB_DEBUG
- #define DEBUG
-#else
- #undef DEBUG
-#endif
-
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
-#include <linux/smp_lock.h>
-#include <linux/rwsem.h>
#include <linux/usb.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include <linux/debugfs.h>
#include <asm/io.h>
-#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
const char *usbcore_name = "usbcore";
static int nousb; /* Disable USB when built into kernel image */
- /* Not honored on modular build */
-
-static DECLARE_RWSEM(usb_all_devices_rwsem);
-
-
-static int generic_probe (struct device *dev)
-{
- return 0;
-}
-static int generic_remove (struct device *dev)
-{
- return 0;
-}
-
-static struct device_driver usb_generic_driver = {
- .owner = THIS_MODULE,
- .name = "usb",
- .bus = &usb_bus_type,
- .probe = generic_probe,
- .remove = generic_remove,
-};
-
-static int usb_generic_driver_data;
-
-/* called from driver core with usb_bus_type.subsys writelock */
-static int usb_probe_interface(struct device *dev)
-{
- struct usb_interface * intf = to_usb_interface(dev);
- struct usb_driver * driver = to_usb_driver(dev->driver);
- const struct usb_device_id *id;
- int error = -ENODEV;
-
- dev_dbg(dev, "%s\n", __FUNCTION__);
-
- if (!driver->probe)
- return error;
- /* FIXME we'd much prefer to just resume it ... */
- if (interface_to_usbdev(intf)->state == USB_STATE_SUSPENDED)
- return -EHOSTUNREACH;
-
- id = usb_match_id (intf, driver->id_table);
- if (id) {
- dev_dbg (dev, "%s - got id\n", __FUNCTION__);
- intf->condition = USB_INTERFACE_BINDING;
- error = driver->probe (intf, id);
- intf->condition = error ? USB_INTERFACE_UNBOUND :
- USB_INTERFACE_BOUND;
- }
-
- return error;
-}
-
-/* called from driver core with usb_bus_type.subsys writelock */
-static int usb_unbind_interface(struct device *dev)
-{
- struct usb_interface *intf = to_usb_interface(dev);
- struct usb_driver *driver = to_usb_driver(intf->dev.driver);
-
- intf->condition = USB_INTERFACE_UNBINDING;
- /* release all urbs for this interface */
- usb_disable_interface(interface_to_usbdev(intf), intf);
+/* Workqueue for autosuspend and for remote wakeup of root hubs */
+struct workqueue_struct *ksuspend_usb_wq;
- if (driver && driver->disconnect)
- driver->disconnect(intf);
+#ifdef CONFIG_USB_SUSPEND
+static int usb_autosuspend_delay = 2; /* Default delay value,
+ * in seconds */
+module_param_named(autosuspend, usb_autosuspend_delay, int, 0644);
+MODULE_PARM_DESC(autosuspend, "default autosuspend delay");
- /* reset other interface state */
- usb_set_interface(interface_to_usbdev(intf),
- intf->altsetting[0].desc.bInterfaceNumber,
- 0);
- usb_set_intfdata(intf, NULL);
- intf->condition = USB_INTERFACE_UNBOUND;
+#else
+#define usb_autosuspend_delay 0
+#endif
- return 0;
-}
/**
- * usb_register - register a USB driver
- * @new_driver: USB operations for the driver
+ * usb_find_alt_setting() - Given a configuration, find the alternate setting
+ * for the given interface.
+ * @config - the configuration to search (not necessarily the current config).
+ * @iface_num - interface number to search in
+ * @alt_num - alternate interface setting number to search for.
*
- * Registers a USB driver with the USB core. The list of unattached
- * interfaces will be rescanned whenever a new driver is added, allowing
- * the new driver to attach to any recognized devices.
- * Returns a negative error code on failure and 0 on success.
- *
- * NOTE: if you want your driver to use the USB major number, you must call
- * usb_register_dev() to enable that functionality. This function no longer
- * takes care of that.
+ * Search the configuration's interface cache for the given alt setting.
*/
-int usb_register(struct usb_driver *new_driver)
+struct usb_host_interface *usb_find_alt_setting(
+ struct usb_host_config *config,
+ unsigned int iface_num,
+ unsigned int alt_num)
{
- int retval = 0;
-
- if (nousb)
- return -ENODEV;
-
- new_driver->driver.name = (char *)new_driver->name;
- new_driver->driver.bus = &usb_bus_type;
- new_driver->driver.probe = usb_probe_interface;
- new_driver->driver.remove = usb_unbind_interface;
- new_driver->driver.owner = new_driver->owner;
-
- usb_lock_all_devices();
- retval = driver_register(&new_driver->driver);
- usb_unlock_all_devices();
+ struct usb_interface_cache *intf_cache = NULL;
+ int i;
- if (!retval) {
- pr_info("%s: registered new driver %s\n",
- usbcore_name, new_driver->name);
- usbfs_update_special();
- } else {
- printk(KERN_ERR "%s: error %d registering driver %s\n",
- usbcore_name, retval, new_driver->name);
+ for (i = 0; i < config->desc.bNumInterfaces; i++) {
+ if (config->intf_cache[i]->altsetting[0].desc.bInterfaceNumber
+ == iface_num) {
+ intf_cache = config->intf_cache[i];
+ break;
+ }
}
+ if (!intf_cache)
+ return NULL;
+ for (i = 0; i < intf_cache->num_altsetting; i++)
+ if (intf_cache->altsetting[i].desc.bAlternateSetting == alt_num)
+ return &intf_cache->altsetting[i];
- return retval;
-}
-
-/**
- * usb_deregister - unregister a USB driver
- * @driver: USB operations of the driver to unregister
- * Context: must be able to sleep
- *
- * Unlinks the specified driver from the internal USB driver list.
- *
- * NOTE: If you called usb_register_dev(), you still need to call
- * usb_deregister_dev() to clean up your driver's allocated minor numbers,
- * this * call will no longer do it for you.
- */
-void usb_deregister(struct usb_driver *driver)
-{
- pr_info("%s: deregistering driver %s\n", usbcore_name, driver->name);
-
- usb_lock_all_devices();
- driver_unregister (&driver->driver);
- usb_unlock_all_devices();
-
- usbfs_update_special();
+ printk(KERN_DEBUG "Did not find alt setting %u for intf %u, "
+ "config %u\n", alt_num, iface_num,
+ config->desc.bConfigurationValue);
+ return NULL;
}
+EXPORT_SYMBOL_GPL(usb_find_alt_setting);
/**
* usb_ifnum_to_if - get the interface object with a given interface number
* Don't call this function unless you are bound to one of the interfaces
* on this device or you have locked the device!
*/
-struct usb_interface *usb_ifnum_to_if(struct usb_device *dev, unsigned ifnum)
+struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev,
+ unsigned ifnum)
{
struct usb_host_config *config = dev->actconfig;
int i;
return NULL;
}
+EXPORT_SYMBOL_GPL(usb_ifnum_to_if);
/**
- * usb_altnum_to_altsetting - get the altsetting structure with a given
- * alternate setting number.
+ * usb_altnum_to_altsetting - get the altsetting structure with a given alternate setting number.
* @intf: the interface containing the altsetting in question
* @altnum: the desired alternate setting number
*
* Don't call this function unless you are bound to the intf interface
* or you have locked the device!
*/
-struct usb_host_interface *usb_altnum_to_altsetting(struct usb_interface *intf,
- unsigned int altnum)
+struct usb_host_interface *usb_altnum_to_altsetting(
+ const struct usb_interface *intf,
+ unsigned int altnum)
{
int i;
}
return NULL;
}
+EXPORT_SYMBOL_GPL(usb_altnum_to_altsetting);
-/**
- * usb_driver_claim_interface - bind a driver to an interface
- * @driver: the driver to be bound
- * @iface: the interface to which it will be bound; must be in the
- * usb device's active configuration
- * @priv: driver data associated with that interface
- *
- * This is used by usb device drivers that need to claim more than one
- * interface on a device when probing (audio and acm are current examples).
- * No device driver should directly modify internal usb_interface or
- * usb_device structure members.
- *
- * Few drivers should need to use this routine, since the most natural
- * way to bind to an interface is to return the private data from
- * the driver's probe() method.
- *
- * Callers must own the device lock and the driver model's usb_bus_type.subsys
- * writelock. So driver probe() entries don't need extra locking,
- * but other call contexts may need to explicitly claim those locks.
- */
-int usb_driver_claim_interface(struct usb_driver *driver,
- struct usb_interface *iface, void* priv)
+static int __find_interface(struct device *dev, void *data)
{
- struct device *dev = &iface->dev;
-
- if (dev->driver)
- return -EBUSY;
-
- dev->driver = &driver->driver;
- usb_set_intfdata(iface, priv);
- iface->condition = USB_INTERFACE_BOUND;
+ int *minor = data;
+ struct usb_interface *intf;
- /* if interface was already added, bind now; else let
- * the future device_add() bind it, bypassing probe()
- */
- if (klist_node_attached(&dev->knode_bus))
- device_bind_driver(dev);
+ if (!is_usb_interface(dev))
+ return 0;
+ intf = to_usb_interface(dev);
+ if (intf->minor != -1 && intf->minor == *minor)
+ return 1;
return 0;
}
/**
- * usb_driver_release_interface - unbind a driver from an interface
- * @driver: the driver to be unbound
- * @iface: the interface from which it will be unbound
- *
- * This can be used by drivers to release an interface without waiting
- * for their disconnect() methods to be called. In typical cases this
- * also causes the driver disconnect() method to be called.
+ * usb_find_interface - find usb_interface pointer for driver and device
+ * @drv: the driver whose current configuration is considered
+ * @minor: the minor number of the desired device
*
- * This call is synchronous, and may not be used in an interrupt context.
- * Callers must own the device lock and the driver model's usb_bus_type.subsys
- * writelock. So driver disconnect() entries don't need extra locking,
- * but other call contexts may need to explicitly claim those locks.
+ * This walks the bus device list and returns a pointer to the interface
+ * with the matching minor. Note, this only works for devices that share the
+ * USB major number.
*/
-void usb_driver_release_interface(struct usb_driver *driver,
- struct usb_interface *iface)
+struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor)
{
- struct device *dev = &iface->dev;
+ struct device *dev;
- /* this should never happen, don't release something that's not ours */
- if (!dev->driver || dev->driver != &driver->driver)
- return;
+ dev = bus_find_device(&usb_bus_type, NULL, &minor, __find_interface);
- /* don't release from within disconnect() */
- if (iface->condition != USB_INTERFACE_BOUND)
- return;
-
- /* release only after device_add() */
- if (klist_node_attached(&dev->knode_bus)) {
- iface->condition = USB_INTERFACE_UNBINDING;
- device_release_driver(dev);
- }
+ /* Drop reference count from bus_find_device */
+ put_device(dev);
- dev->driver = NULL;
- usb_set_intfdata(iface, NULL);
- iface->condition = USB_INTERFACE_UNBOUND;
+ return dev ? to_usb_interface(dev) : NULL;
}
+EXPORT_SYMBOL_GPL(usb_find_interface);
/**
- * usb_match_id - find first usb_device_id matching device or interface
- * @interface: the interface of interest
- * @id: array of usb_device_id structures, terminated by zero entry
- *
- * usb_match_id searches an array of usb_device_id's and returns
- * the first one matching the device or interface, or null.
- * This is used when binding (or rebinding) a driver to an interface.
- * Most USB device drivers will use this indirectly, through the usb core,
- * but some layered driver frameworks use it directly.
- * These device tables are exported with MODULE_DEVICE_TABLE, through
- * modutils and "modules.usbmap", to support the driver loading
- * functionality of USB hotplugging.
- *
- * What Matches:
- *
- * The "match_flags" element in a usb_device_id controls which
- * members are used. If the corresponding bit is set, the
- * value in the device_id must match its corresponding member
- * in the device or interface descriptor, or else the device_id
- * does not match.
- *
- * "driver_info" is normally used only by device drivers,
- * but you can create a wildcard "matches anything" usb_device_id
- * as a driver's "modules.usbmap" entry if you provide an id with
- * only a nonzero "driver_info" field. If you do this, the USB device
- * driver's probe() routine should use additional intelligence to
- * decide whether to bind to the specified interface.
- *
- * What Makes Good usb_device_id Tables:
- *
- * The match algorithm is very simple, so that intelligence in
- * driver selection must come from smart driver id records.
- * Unless you have good reasons to use another selection policy,
- * provide match elements only in related groups, and order match
- * specifiers from specific to general. Use the macros provided
- * for that purpose if you can.
- *
- * The most specific match specifiers use device descriptor
- * data. These are commonly used with product-specific matches;
- * the USB_DEVICE macro lets you provide vendor and product IDs,
- * and you can also match against ranges of product revisions.
- * These are widely used for devices with application or vendor
- * specific bDeviceClass values.
- *
- * Matches based on device class/subclass/protocol specifications
- * are slightly more general; use the USB_DEVICE_INFO macro, or
- * its siblings. These are used with single-function devices
- * where bDeviceClass doesn't specify that each interface has
- * its own class.
+ * usb_release_dev - free a usb device structure when all users of it are finished.
+ * @dev: device that's been disconnected
*
- * Matches based on interface class/subclass/protocol are the
- * most general; they let drivers bind to any interface on a
- * multiple-function device. Use the USB_INTERFACE_INFO
- * macro, or its siblings, to match class-per-interface style
- * devices (as recorded in bDeviceClass).
- *
- * Within those groups, remember that not all combinations are
- * meaningful. For example, don't give a product version range
- * without vendor and product IDs; or specify a protocol without
- * its associated class and subclass.
- */
-const struct usb_device_id *
-usb_match_id(struct usb_interface *interface, const struct usb_device_id *id)
+ * Will be called only by the device core when all users of this usb device are
+ * done.
+ */
+static void usb_release_dev(struct device *dev)
{
- struct usb_host_interface *intf;
- struct usb_device *dev;
-
- /* proc_connectinfo in devio.c may call us with id == NULL. */
- if (id == NULL)
- return NULL;
-
- intf = interface->cur_altsetting;
- dev = interface_to_usbdev(interface);
-
- /* It is important to check that id->driver_info is nonzero,
- since an entry that is all zeroes except for a nonzero
- id->driver_info is the way to create an entry that
- indicates that the driver want to examine every
- device and interface. */
- for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass ||
- id->driver_info; id++) {
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
- id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
- id->idProduct != le16_to_cpu(dev->descriptor.idProduct))
- continue;
-
- /* No need to test id->bcdDevice_lo != 0, since 0 is never
- greater than any unsigned number. */
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
- (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice)))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
- (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice)))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
- (id->bDeviceClass != dev->descriptor.bDeviceClass))
- continue;
+ struct usb_device *udev;
+ struct usb_hcd *hcd;
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
- (id->bDeviceSubClass!= dev->descriptor.bDeviceSubClass))
- continue;
+ udev = to_usb_device(dev);
+ hcd = bus_to_hcd(udev->bus);
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
- (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
- continue;
+ usb_destroy_configuration(udev);
+ /* Root hubs aren't real devices, so don't free HCD resources */
+ if (hcd->driver->free_dev && udev->parent)
+ hcd->driver->free_dev(hcd, udev);
+ usb_put_hcd(hcd);
+ kfree(udev->product);
+ kfree(udev->manufacturer);
+ kfree(udev->serial);
+ kfree(udev);
+}
- if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
- (id->bInterfaceClass != intf->desc.bInterfaceClass))
- continue;
+#ifdef CONFIG_HOTPLUG
+static int usb_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct usb_device *usb_dev;
- if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
- (id->bInterfaceSubClass != intf->desc.bInterfaceSubClass))
- continue;
+ usb_dev = to_usb_device(dev);
- if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
- (id->bInterfaceProtocol != intf->desc.bInterfaceProtocol))
- continue;
+ if (add_uevent_var(env, "BUSNUM=%03d", usb_dev->bus->busnum))
+ return -ENOMEM;
- return id;
- }
+ if (add_uevent_var(env, "DEVNUM=%03d", usb_dev->devnum))
+ return -ENOMEM;
- return NULL;
+ return 0;
}
+#else
-static int __find_interface(struct device * dev, void * data)
+static int usb_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct usb_interface ** ret = (struct usb_interface **)data;
- struct usb_interface * intf = *ret;
- int *minor = (int *)data;
+ return -ENODEV;
+}
+#endif /* CONFIG_HOTPLUG */
- /* can't look at usb devices, only interfaces */
- if (dev->driver == &usb_generic_driver)
- return 0;
+#ifdef CONFIG_PM
- intf = to_usb_interface(dev);
- if (intf->minor != -1 && intf->minor == *minor) {
- *ret = intf;
- return 1;
- }
+static int ksuspend_usb_init(void)
+{
+ /* This workqueue is supposed to be both freezable and
+ * singlethreaded. Its job doesn't justify running on more
+ * than one CPU.
+ */
+ ksuspend_usb_wq = create_freezeable_workqueue("ksuspend_usbd");
+ if (!ksuspend_usb_wq)
+ return -ENOMEM;
return 0;
}
-/**
- * usb_find_interface - find usb_interface pointer for driver and device
- * @drv: the driver whose current configuration is considered
- * @minor: the minor number of the desired device
- *
- * This walks the driver device list and returns a pointer to the interface
- * with the matching minor. Note, this only works for devices that share the
- * USB major number.
- */
-struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor)
+static void ksuspend_usb_cleanup(void)
{
- struct usb_interface *intf = (struct usb_interface *)(long)minor;
- int ret;
+ destroy_workqueue(ksuspend_usb_wq);
+}
- ret = driver_for_each_device(&drv->driver, NULL, &intf, __find_interface);
+/* USB device Power-Management thunks.
+ * There's no need to distinguish here between quiescing a USB device
+ * and powering it down; the generic_suspend() routine takes care of
+ * it by skipping the usb_port_suspend() call for a quiesce. And for
+ * USB interfaces there's no difference at all.
+ */
- return ret ? intf : NULL;
+static int usb_dev_prepare(struct device *dev)
+{
+ return 0; /* Implement eventually? */
}
-static int usb_device_match (struct device *dev, struct device_driver *drv)
+static void usb_dev_complete(struct device *dev)
{
- struct usb_interface *intf;
- struct usb_driver *usb_drv;
- const struct usb_device_id *id;
-
- /* check for generic driver, which we don't match any device with */
- if (drv == &usb_generic_driver)
- return 0;
-
- intf = to_usb_interface(dev);
- usb_drv = to_usb_driver(drv);
-
- id = usb_match_id (intf, usb_drv->id_table);
- if (id)
- return 1;
-
- return 0;
+ /* Currently used only for rebinding interfaces */
+ usb_resume(dev, PMSG_RESUME); /* Message event is meaningless */
}
+static int usb_dev_suspend(struct device *dev)
+{
+ return usb_suspend(dev, PMSG_SUSPEND);
+}
-#ifdef CONFIG_HOTPLUG
+static int usb_dev_resume(struct device *dev)
+{
+ return usb_resume(dev, PMSG_RESUME);
+}
-/*
- * USB hotplugging invokes what /proc/sys/kernel/hotplug says
- * (normally /sbin/hotplug) when USB devices get added or removed.
- *
- * This invokes a user mode policy agent, typically helping to load driver
- * or other modules, configure the device, and more. Drivers can provide
- * a MODULE_DEVICE_TABLE to help with module loading subtasks.
- *
- * We're called either from khubd (the typical case) or from root hub
- * (init, kapmd, modprobe, rmmod, etc), but the agents need to handle
- * delays in event delivery. Use sysfs (and DEVPATH) to make sure the
- * device (and this configuration!) are still present.
- */
-static int usb_hotplug (struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int usb_dev_freeze(struct device *dev)
{
- struct usb_interface *intf;
- struct usb_device *usb_dev;
- int i = 0;
- int length = 0;
+ return usb_suspend(dev, PMSG_FREEZE);
+}
- if (!dev)
- return -ENODEV;
+static int usb_dev_thaw(struct device *dev)
+{
+ return usb_resume(dev, PMSG_THAW);
+}
- /* driver is often null here; dev_dbg() would oops */
- pr_debug ("usb %s: hotplug\n", dev->bus_id);
+static int usb_dev_poweroff(struct device *dev)
+{
+ return usb_suspend(dev, PMSG_HIBERNATE);
+}
- /* Must check driver_data here, as on remove driver is always NULL */
- if ((dev->driver == &usb_generic_driver) ||
- (dev->driver_data == &usb_generic_driver_data))
- return 0;
+static int usb_dev_restore(struct device *dev)
+{
+ return usb_resume(dev, PMSG_RESTORE);
+}
- intf = to_usb_interface(dev);
- usb_dev = interface_to_usbdev (intf);
-
- if (usb_dev->devnum < 0) {
- pr_debug ("usb %s: already deleted?\n", dev->bus_id);
- return -ENODEV;
- }
- if (!usb_dev->bus) {
- pr_debug ("usb %s: bus removed?\n", dev->bus_id);
- return -ENODEV;
- }
+static const struct dev_pm_ops usb_device_pm_ops = {
+ .prepare = usb_dev_prepare,
+ .complete = usb_dev_complete,
+ .suspend = usb_dev_suspend,
+ .resume = usb_dev_resume,
+ .freeze = usb_dev_freeze,
+ .thaw = usb_dev_thaw,
+ .poweroff = usb_dev_poweroff,
+ .restore = usb_dev_restore,
+};
-#ifdef CONFIG_USB_DEVICEFS
- /* If this is available, userspace programs can directly read
- * all the device descriptors we don't tell them about. Or
- * even act as usermode drivers.
- *
- * FIXME reduce hardwired intelligence here
- */
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "DEVICE=/proc/bus/usb/%03d/%03d",
- usb_dev->bus->busnum, usb_dev->devnum))
- return -ENOMEM;
-#endif
+#else
- /* per-device configurations are common */
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PRODUCT=%x/%x/%x",
- le16_to_cpu(usb_dev->descriptor.idVendor),
- le16_to_cpu(usb_dev->descriptor.idProduct),
- le16_to_cpu(usb_dev->descriptor.bcdDevice)))
- return -ENOMEM;
+#define ksuspend_usb_init() 0
+#define ksuspend_usb_cleanup() do {} while (0)
+#define usb_device_pm_ops (*(struct dev_pm_ops *)0)
- /* class-based driver binding models */
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "TYPE=%d/%d/%d",
- usb_dev->descriptor.bDeviceClass,
- usb_dev->descriptor.bDeviceSubClass,
- usb_dev->descriptor.bDeviceProtocol))
- return -ENOMEM;
+#endif /* CONFIG_PM */
- if (usb_dev->descriptor.bDeviceClass == 0) {
- struct usb_host_interface *alt = intf->cur_altsetting;
-
- /* 2.4 only exposed interface zero. in 2.5, hotplug
- * agents are called for all interfaces, and can use
- * $DEVPATH/bInterfaceNumber if necessary.
- */
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "INTERFACE=%d/%d/%d",
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol))
- return -ENOMEM;
-
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
- le16_to_cpu(usb_dev->descriptor.idVendor),
- le16_to_cpu(usb_dev->descriptor.idProduct),
- le16_to_cpu(usb_dev->descriptor.bcdDevice),
- usb_dev->descriptor.bDeviceClass,
- usb_dev->descriptor.bDeviceSubClass,
- usb_dev->descriptor.bDeviceProtocol,
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol))
- return -ENOMEM;
- } else {
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic*isc*ip*",
- le16_to_cpu(usb_dev->descriptor.idVendor),
- le16_to_cpu(usb_dev->descriptor.idProduct),
- le16_to_cpu(usb_dev->descriptor.bcdDevice),
- usb_dev->descriptor.bDeviceClass,
- usb_dev->descriptor.bDeviceSubClass,
- usb_dev->descriptor.bDeviceProtocol))
- return -ENOMEM;
- }
- envp[i] = NULL;
+static char *usb_devnode(struct device *dev, mode_t *mode)
+{
+ struct usb_device *usb_dev;
- return 0;
+ usb_dev = to_usb_device(dev);
+ return kasprintf(GFP_KERNEL, "bus/usb/%03d/%03d",
+ usb_dev->bus->busnum, usb_dev->devnum);
}
-#else
-
-static int usb_hotplug (struct device *dev, char **envp,
- int num_envp, char *buffer, int buffer_size)
-{
- return -ENODEV;
-}
+struct device_type usb_device_type = {
+ .name = "usb_device",
+ .release = usb_release_dev,
+ .uevent = usb_dev_uevent,
+ .devnode = usb_devnode,
+ .pm = &usb_device_pm_ops,
+};
-#endif /* CONFIG_HOTPLUG */
-/**
- * usb_release_dev - free a usb device structure when all users of it are finished.
- * @dev: device that's been disconnected
- *
- * Will be called only by the device core when all users of this usb device are
- * done.
- */
-static void usb_release_dev(struct device *dev)
+/* Returns 1 if @usb_bus is WUSB, 0 otherwise */
+static unsigned usb_bus_is_wusb(struct usb_bus *bus)
{
- struct usb_device *udev;
-
- udev = to_usb_device(dev);
-
- usb_destroy_configuration(udev);
- usb_bus_put(udev->bus);
- kfree(udev->product);
- kfree(udev->manufacturer);
- kfree(udev->serial);
- kfree(udev);
+ struct usb_hcd *hcd = container_of(bus, struct usb_hcd, self);
+ return hcd->wireless;
}
+
/**
* usb_alloc_dev - usb device constructor (usbcore-internal)
* @parent: hub to which device is connected; null to allocate a root hub
* @bus: bus used to access the device
* @port1: one-based index of port; ignored for root hubs
- * Context: !in_interrupt ()
+ * Context: !in_interrupt()
*
* Only hub drivers (including virtual root hub drivers for host
* controllers) should ever call this.
*
* This call may not be used in a non-sleeping context.
*/
-struct usb_device *
-usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1)
+struct usb_device *usb_alloc_dev(struct usb_device *parent,
+ struct usb_bus *bus, unsigned port1)
{
struct usb_device *dev;
+ struct usb_hcd *usb_hcd = container_of(bus, struct usb_hcd, self);
+ unsigned root_hub = 0;
- dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
- memset(dev, 0, sizeof(*dev));
-
- bus = usb_bus_get(bus);
- if (!bus) {
+ if (!usb_get_hcd(bus_to_hcd(bus))) {
+ kfree(dev);
+ return NULL;
+ }
+ /* Root hubs aren't true devices, so don't allocate HCD resources */
+ if (usb_hcd->driver->alloc_dev && parent &&
+ !usb_hcd->driver->alloc_dev(usb_hcd, dev)) {
+ usb_put_hcd(bus_to_hcd(bus));
kfree(dev);
return NULL;
}
device_initialize(&dev->dev);
dev->dev.bus = &usb_bus_type;
+ dev->dev.type = &usb_device_type;
+ dev->dev.groups = usb_device_groups;
dev->dev.dma_mask = bus->controller->dma_mask;
- dev->dev.driver_data = &usb_generic_driver_data;
- dev->dev.driver = &usb_generic_driver;
- dev->dev.release = usb_release_dev;
+ set_dev_node(&dev->dev, dev_to_node(bus->controller));
dev->state = USB_STATE_ATTACHED;
+ atomic_set(&dev->urbnum, 0);
INIT_LIST_HEAD(&dev->ep0.urb_list);
dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;
dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT;
/* ep0 maxpacket comes later, from device descriptor */
- dev->ep_in[0] = dev->ep_out[0] = &dev->ep0;
+ usb_enable_endpoint(dev, &dev->ep0, false);
+ dev->can_submit = 1;
/* Save readable and stable topology id, distinguishing devices
* by location for diagnostics, tools, driver model, etc. The
* string is a path along hub ports, from the root. Each device's
* dev->devpath will be stable until USB is re-cabled, and hubs
- * are often labeled with these port numbers. The bus_id isn't
+ * are often labeled with these port numbers. The name isn't
* as stable: bus->busnum changes easily from modprobe order,
* cardbus or pci hotplugging, and so on.
*/
- if (unlikely (!parent)) {
- dev->devpath [0] = '0';
+ if (unlikely(!parent)) {
+ dev->devpath[0] = '0';
+ dev->route = 0;
dev->dev.parent = bus->controller;
- sprintf (&dev->dev.bus_id[0], "usb%d", bus->busnum);
+ dev_set_name(&dev->dev, "usb%d", bus->busnum);
+ root_hub = 1;
} else {
/* match any labeling on the hubs; it's one-based */
- if (parent->devpath [0] == '0')
- snprintf (dev->devpath, sizeof dev->devpath,
+ if (parent->devpath[0] == '0') {
+ snprintf(dev->devpath, sizeof dev->devpath,
"%d", port1);
- else
- snprintf (dev->devpath, sizeof dev->devpath,
+ /* Root ports are not counted in route string */
+ dev->route = 0;
+ } else {
+ snprintf(dev->devpath, sizeof dev->devpath,
"%s.%d", parent->devpath, port1);
+ /* Route string assumes hubs have less than 16 ports */
+ if (port1 < 15)
+ dev->route = parent->route +
+ (port1 << ((parent->level - 1)*4));
+ else
+ dev->route = parent->route +
+ (15 << ((parent->level - 1)*4));
+ }
dev->dev.parent = &parent->dev;
- sprintf (&dev->dev.bus_id[0], "%d-%s",
- bus->busnum, dev->devpath);
+ dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath);
/* hub driver sets up TT records */
}
+ dev->portnum = port1;
dev->bus = bus;
dev->parent = parent;
INIT_LIST_HEAD(&dev->filelist);
- init_MUTEX(&dev->serialize);
-
+#ifdef CONFIG_PM
+ mutex_init(&dev->pm_mutex);
+ INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
+ INIT_WORK(&dev->autoresume, usb_autoresume_work);
+ dev->autosuspend_delay = usb_autosuspend_delay * HZ;
+ dev->connect_time = jiffies;
+ dev->active_duration = -jiffies;
+#endif
+ if (root_hub) /* Root hub always ok [and always wired] */
+ dev->authorized = 1;
+ else {
+ dev->authorized = usb_hcd->authorized_default;
+ dev->wusb = usb_bus_is_wusb(bus)? 1 : 0;
+ }
return dev;
}
get_device(&dev->dev);
return dev;
}
+EXPORT_SYMBOL_GPL(usb_get_dev);
/**
* usb_put_dev - release a use of the usb device structure
if (dev)
put_device(&dev->dev);
}
+EXPORT_SYMBOL_GPL(usb_put_dev);
/**
* usb_get_intf - increments the reference count of the usb interface structure
get_device(&intf->dev);
return intf;
}
+EXPORT_SYMBOL_GPL(usb_get_intf);
/**
* usb_put_intf - release a use of the usb interface structure
if (intf)
put_device(&intf->dev);
}
-
+EXPORT_SYMBOL_GPL(usb_put_intf);
/* USB device locking
*
- * Although locking USB devices should be straightforward, it is
- * complicated by the way the driver-model core works. When a new USB
- * driver is registered or unregistered, the core will automatically
- * probe or disconnect all matching interfaces on all USB devices while
- * holding the USB subsystem writelock. There's no good way for us to
- * tell which devices will be used or to lock them beforehand; our only
- * option is to effectively lock all the USB devices.
- *
- * We do that by using a private rw-semaphore, usb_all_devices_rwsem.
- * When locking an individual device you must first acquire the rwsem's
- * readlock. When a driver is registered or unregistered the writelock
- * must be held. These actions are encapsulated in the subroutines
- * below, so all a driver needs to do is call usb_lock_device() and
- * usb_unlock_device().
+ * USB devices and interfaces are locked using the semaphore in their
+ * embedded struct device. The hub driver guarantees that whenever a
+ * device is connected or disconnected, drivers are called with the
+ * USB device locked as well as their particular interface.
*
* Complications arise when several devices are to be locked at the same
* time. Only hub-aware drivers that are part of usbcore ever have to
- * do this; nobody else needs to worry about it. The problem is that
- * usb_lock_device() must not be called to lock a second device since it
- * would acquire the rwsem's readlock reentrantly, leading to deadlock if
- * another thread was waiting for the writelock. The solution is simple:
- *
- * When locking more than one device, call usb_lock_device()
- * to lock the first one. Lock the others by calling
- * down(&udev->serialize) directly.
- *
- * When unlocking multiple devices, use up(&udev->serialize)
- * to unlock all but the last one. Unlock the last one by
- * calling usb_unlock_device().
+ * do this; nobody else needs to worry about it. The rule for locking
+ * is simple:
*
* When locking both a device and its parent, always lock the
* the parent first.
*/
/**
- * usb_lock_device - acquire the lock for a usb device structure
- * @udev: device that's being locked
- *
- * Use this routine when you don't hold any other device locks;
- * to acquire nested inner locks call down(&udev->serialize) directly.
- * This is necessary for proper interaction with usb_lock_all_devices().
- */
-void usb_lock_device(struct usb_device *udev)
-{
- down_read(&usb_all_devices_rwsem);
- down(&udev->serialize);
-}
-
-/**
- * usb_trylock_device - attempt to acquire the lock for a usb device structure
- * @udev: device that's being locked
- *
- * Don't use this routine if you already hold a device lock;
- * use down_trylock(&udev->serialize) instead.
- * This is necessary for proper interaction with usb_lock_all_devices().
- *
- * Returns 1 if successful, 0 if contention.
- */
-int usb_trylock_device(struct usb_device *udev)
-{
- if (!down_read_trylock(&usb_all_devices_rwsem))
- return 0;
- if (down_trylock(&udev->serialize)) {
- up_read(&usb_all_devices_rwsem);
- return 0;
- }
- return 1;
-}
-
-/**
- * usb_lock_device_for_reset - cautiously acquire the lock for a
- * usb device structure
+ * usb_lock_device_for_reset - cautiously acquire the lock for a usb device structure
* @udev: device that's being locked
* @iface: interface bound to the driver making the request (optional)
*
* is neither BINDING nor BOUND. Rather than sleeping to wait for the
* lock, the routine polls repeatedly. This is to prevent deadlock with
* disconnect; in some drivers (such as usb-storage) the disconnect()
- * callback will block waiting for a device reset to complete.
+ * or suspend() method will block waiting for a device reset to complete.
*
- * Returns a negative error code for failure, otherwise 1 or 0 to indicate
- * that the device will or will not have to be unlocked. (0 can be
- * returned when an interface is given and is BINDING, because in that
- * case the driver already owns the device lock.)
+ * Returns a negative error code for failure, otherwise 0.
*/
int usb_lock_device_for_reset(struct usb_device *udev,
- struct usb_interface *iface)
+ const struct usb_interface *iface)
{
+ unsigned long jiffies_expire = jiffies + HZ;
+
if (udev->state == USB_STATE_NOTATTACHED)
return -ENODEV;
if (udev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
- if (iface) {
- switch (iface->condition) {
- case USB_INTERFACE_BINDING:
- return 0;
- case USB_INTERFACE_BOUND:
- break;
- default:
- return -EINTR;
- }
- }
+ if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+ iface->condition == USB_INTERFACE_UNBOUND))
+ return -EINTR;
+
+ while (usb_trylock_device(udev) != 0) {
+
+ /* If we can't acquire the lock after waiting one second,
+ * we're probably deadlocked */
+ if (time_after(jiffies, jiffies_expire))
+ return -EBUSY;
- while (!usb_trylock_device(udev)) {
msleep(15);
if (udev->state == USB_STATE_NOTATTACHED)
return -ENODEV;
if (udev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
- if (iface && iface->condition != USB_INTERFACE_BOUND)
+ if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+ iface->condition == USB_INTERFACE_UNBOUND))
return -EINTR;
}
- return 1;
-}
-
-/**
- * usb_unlock_device - release the lock for a usb device structure
- * @udev: device that's being unlocked
- *
- * Use this routine when releasing the only device lock you hold;
- * to release inner nested locks call up(&udev->serialize) directly.
- * This is necessary for proper interaction with usb_lock_all_devices().
- */
-void usb_unlock_device(struct usb_device *udev)
-{
- up(&udev->serialize);
- up_read(&usb_all_devices_rwsem);
-}
-
-/**
- * usb_lock_all_devices - acquire the lock for all usb device structures
- *
- * This is necessary when registering a new driver or probing a bus,
- * since the driver-model core may try to use any usb_device.
- */
-void usb_lock_all_devices(void)
-{
- down_write(&usb_all_devices_rwsem);
-}
-
-/**
- * usb_unlock_all_devices - release the lock for all usb device structures
- */
-void usb_unlock_all_devices(void)
-{
- up_write(&usb_all_devices_rwsem);
+ return 0;
}
-
+EXPORT_SYMBOL_GPL(usb_lock_device_for_reset);
static struct usb_device *match_device(struct usb_device *dev,
u16 vendor_id, u16 product_id)
/* see if this device matches */
if ((vendor_id == le16_to_cpu(dev->descriptor.idVendor)) &&
(product_id == le16_to_cpu(dev->descriptor.idProduct))) {
- dev_dbg (&dev->dev, "matched this device!\n");
+ dev_dbg(&dev->dev, "matched this device!\n");
ret_dev = usb_get_dev(dev);
goto exit;
}
/* look through all of the children of this device */
for (child = 0; child < dev->maxchild; ++child) {
if (dev->children[child]) {
- down(&dev->children[child]->serialize);
+ usb_lock_device(dev->children[child]);
ret_dev = match_device(dev->children[child],
vendor_id, product_id);
- up(&dev->children[child]->serialize);
+ usb_unlock_device(dev->children[child]);
if (ret_dev)
goto exit;
}
struct list_head *buslist;
struct usb_bus *bus;
struct usb_device *dev = NULL;
-
- down(&usb_bus_list_lock);
+
+ mutex_lock(&usb_bus_list_lock);
for (buslist = usb_bus_list.next;
- buslist != &usb_bus_list;
+ buslist != &usb_bus_list;
buslist = buslist->next) {
bus = container_of(buslist, struct usb_bus, bus_list);
if (!bus->root_hub)
goto exit;
}
exit:
- up(&usb_bus_list_lock);
+ mutex_unlock(&usb_bus_list_lock);
return dev;
}
*/
int usb_get_current_frame_number(struct usb_device *dev)
{
- return dev->bus->op->get_frame_number (dev);
+ return usb_hcd_get_frame_number(dev);
}
+EXPORT_SYMBOL_GPL(usb_get_current_frame_number);
/*-------------------------------------------------------------------*/
/*
*/
int __usb_get_extra_descriptor(char *buffer, unsigned size,
- unsigned char type, void **ptr)
+ unsigned char type, void **ptr)
{
struct usb_descriptor_header *header;
printk(KERN_ERR
"%s: bogus descriptor, type %d length %d\n",
usbcore_name,
- header->bDescriptorType,
+ header->bDescriptorType,
header->bLength);
return -1;
}
}
return -1;
}
+EXPORT_SYMBOL_GPL(__usb_get_extra_descriptor);
/**
* usb_buffer_alloc - allocate dma-consistent buffer for URB_NO_xxx_DMA_MAP
* address (through the pointer provided).
*
* These buffers are used with URB_NO_xxx_DMA_MAP set in urb->transfer_flags
- * to avoid behaviors like using "DMA bounce buffers", or tying down I/O
- * mapping hardware for long idle periods. The implementation varies between
+ * to avoid behaviors like using "DMA bounce buffers", or thrashing IOMMU
+ * hardware during URB completion/resubmit. The implementation varies between
* platforms, depending on details of how DMA will work to this device.
- * Using these buffers also helps prevent cacheline sharing problems on
- * architectures where CPU caches are not DMA-coherent.
+ * Using these buffers also eliminates cacheline sharing problems on
+ * architectures where CPU caches are not DMA-coherent. On systems without
+ * bus-snooping caches, these buffers are uncached.
*
* When the buffer is no longer used, free it with usb_buffer_free().
*/
-void *usb_buffer_alloc (
- struct usb_device *dev,
- size_t size,
- unsigned mem_flags,
- dma_addr_t *dma
-)
+void *usb_buffer_alloc(struct usb_device *dev, size_t size, gfp_t mem_flags,
+ dma_addr_t *dma)
{
- if (!dev || !dev->bus || !dev->bus->op || !dev->bus->op->buffer_alloc)
+ if (!dev || !dev->bus)
return NULL;
- return dev->bus->op->buffer_alloc (dev->bus, size, mem_flags, dma);
+ return hcd_buffer_alloc(dev->bus, size, mem_flags, dma);
}
+EXPORT_SYMBOL_GPL(usb_buffer_alloc);
/**
* usb_buffer_free - free memory allocated with usb_buffer_alloc()
*
* This reclaims an I/O buffer, letting it be reused. The memory must have
* been allocated using usb_buffer_alloc(), and the parameters must match
- * those provided in that allocation request.
+ * those provided in that allocation request.
*/
-void usb_buffer_free (
- struct usb_device *dev,
- size_t size,
- void *addr,
- dma_addr_t dma
-)
+void usb_buffer_free(struct usb_device *dev, size_t size, void *addr,
+ dma_addr_t dma)
{
- if (!dev || !dev->bus || !dev->bus->op || !dev->bus->op->buffer_free)
- return;
- dev->bus->op->buffer_free (dev->bus, size, addr, dma);
+ if (!dev || !dev->bus)
+ return;
+ if (!addr)
+ return;
+ hcd_buffer_free(dev->bus, size, addr, dma);
}
+EXPORT_SYMBOL_GPL(usb_buffer_free);
/**
* usb_buffer_map - create DMA mapping(s) for an urb
* Reverse the effect of this call with usb_buffer_unmap().
*/
#if 0
-struct urb *usb_buffer_map (struct urb *urb)
+struct urb *usb_buffer_map(struct urb *urb)
{
struct usb_bus *bus;
struct device *controller;
return NULL;
if (controller->dma_mask) {
- urb->transfer_dma = dma_map_single (controller,
+ urb->transfer_dma = dma_map_single(controller,
urb->transfer_buffer, urb->transfer_buffer_length,
- usb_pipein (urb->pipe)
+ usb_pipein(urb->pipe)
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
- if (usb_pipecontrol (urb->pipe))
- urb->setup_dma = dma_map_single (controller,
+ if (usb_pipecontrol(urb->pipe))
+ urb->setup_dma = dma_map_single(controller,
urb->setup_packet,
- sizeof (struct usb_ctrlrequest),
+ sizeof(struct usb_ctrlrequest),
DMA_TO_DEVICE);
- // FIXME generic api broken like pci, can't report errors
- // if (urb->transfer_dma == DMA_ADDR_INVALID) return 0;
+ /* FIXME generic api broken like pci, can't report errors */
+ /* if (urb->transfer_dma == DMA_ADDR_INVALID) return 0; */
} else
urb->transfer_dma = ~0;
urb->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP
| URB_NO_SETUP_DMA_MAP);
return urb;
}
+EXPORT_SYMBOL_GPL(usb_buffer_map);
#endif /* 0 */
/* XXX DISABLED, no users currently. If you wish to re-enable this
* usb_buffer_dmasync - synchronize DMA and CPU view of buffer(s)
* @urb: urb whose transfer_buffer/setup_packet will be synchronized
*/
-void usb_buffer_dmasync (struct urb *urb)
+void usb_buffer_dmasync(struct urb *urb)
{
struct usb_bus *bus;
struct device *controller;
return;
if (controller->dma_mask) {
- dma_sync_single (controller,
+ dma_sync_single_for_cpu(controller,
urb->transfer_dma, urb->transfer_buffer_length,
- usb_pipein (urb->pipe)
+ usb_pipein(urb->pipe)
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
- if (usb_pipecontrol (urb->pipe))
- dma_sync_single (controller,
+ if (usb_pipecontrol(urb->pipe))
+ dma_sync_single_for_cpu(controller,
urb->setup_dma,
- sizeof (struct usb_ctrlrequest),
+ sizeof(struct usb_ctrlrequest),
DMA_TO_DEVICE);
}
}
+EXPORT_SYMBOL_GPL(usb_buffer_dmasync);
#endif
/**
* Reverses the effect of usb_buffer_map().
*/
#if 0
-void usb_buffer_unmap (struct urb *urb)
+void usb_buffer_unmap(struct urb *urb)
{
struct usb_bus *bus;
struct device *controller;
return;
if (controller->dma_mask) {
- dma_unmap_single (controller,
+ dma_unmap_single(controller,
urb->transfer_dma, urb->transfer_buffer_length,
- usb_pipein (urb->pipe)
+ usb_pipein(urb->pipe)
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
- if (usb_pipecontrol (urb->pipe))
- dma_unmap_single (controller,
+ if (usb_pipecontrol(urb->pipe))
+ dma_unmap_single(controller,
urb->setup_dma,
- sizeof (struct usb_ctrlrequest),
+ sizeof(struct usb_ctrlrequest),
DMA_TO_DEVICE);
}
urb->transfer_flags &= ~(URB_NO_TRANSFER_DMA_MAP
| URB_NO_SETUP_DMA_MAP);
}
+EXPORT_SYMBOL_GPL(usb_buffer_unmap);
#endif /* 0 */
/**
* usb_buffer_map_sg - create scatterlist DMA mapping(s) for an endpoint
* @dev: device to which the scatterlist will be mapped
- * @pipe: endpoint defining the mapping direction
+ * @is_in: mapping transfer direction
* @sg: the scatterlist to map
* @nents: the number of entries in the scatterlist
*
*
* Reverse the effect of this call with usb_buffer_unmap_sg().
*/
-int usb_buffer_map_sg (struct usb_device *dev, unsigned pipe,
- struct scatterlist *sg, int nents)
+int usb_buffer_map_sg(const struct usb_device *dev, int is_in,
+ struct scatterlist *sg, int nents)
{
struct usb_bus *bus;
struct device *controller;
if (!dev
- || usb_pipecontrol (pipe)
|| !(bus = dev->bus)
|| !(controller = bus->controller)
|| !controller->dma_mask)
- return -1;
+ return -EINVAL;
- // FIXME generic api broken like pci, can't report errors
- return dma_map_sg (controller, sg, nents,
- usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ /* FIXME generic api broken like pci, can't report errors */
+ return dma_map_sg(controller, sg, nents,
+ is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE) ? : -ENOMEM;
}
+EXPORT_SYMBOL_GPL(usb_buffer_map_sg);
/* XXX DISABLED, no users currently. If you wish to re-enable this
* XXX please determine whether the sync is to transfer ownership of
/**
* usb_buffer_dmasync_sg - synchronize DMA and CPU view of scatterlist buffer(s)
* @dev: device to which the scatterlist will be mapped
- * @pipe: endpoint defining the mapping direction
+ * @is_in: mapping transfer direction
* @sg: the scatterlist to synchronize
* @n_hw_ents: the positive return value from usb_buffer_map_sg
*
* Use this when you are re-using a scatterlist's data buffers for
* another USB request.
*/
-void usb_buffer_dmasync_sg (struct usb_device *dev, unsigned pipe,
- struct scatterlist *sg, int n_hw_ents)
+void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in,
+ struct scatterlist *sg, int n_hw_ents)
{
struct usb_bus *bus;
struct device *controller;
|| !controller->dma_mask)
return;
- dma_sync_sg (controller, sg, n_hw_ents,
- usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ dma_sync_sg_for_cpu(controller, sg, n_hw_ents,
+ is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
}
+EXPORT_SYMBOL_GPL(usb_buffer_dmasync_sg);
#endif
/**
* usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist
* @dev: device to which the scatterlist will be mapped
- * @pipe: endpoint defining the mapping direction
+ * @is_in: mapping transfer direction
* @sg: the scatterlist to unmap
* @n_hw_ents: the positive return value from usb_buffer_map_sg
*
* Reverses the effect of usb_buffer_map_sg().
*/
-void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe,
- struct scatterlist *sg, int n_hw_ents)
+void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in,
+ struct scatterlist *sg, int n_hw_ents)
{
struct usb_bus *bus;
struct device *controller;
|| !controller->dma_mask)
return;
- dma_unmap_sg (controller, sg, n_hw_ents,
- usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ dma_unmap_sg(controller, sg, n_hw_ents,
+ is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
}
+EXPORT_SYMBOL_GPL(usb_buffer_unmap_sg);
-static int usb_generic_suspend(struct device *dev, pm_message_t message)
-{
- struct usb_interface *intf;
- struct usb_driver *driver;
-
- if (dev->driver == &usb_generic_driver)
- return usb_suspend_device (to_usb_device(dev), message);
-
- if ((dev->driver == NULL) ||
- (dev->driver_data == &usb_generic_driver_data))
- return 0;
-
- intf = to_usb_interface(dev);
- driver = to_usb_driver(dev->driver);
-
- /* there's only one USB suspend state */
- if (intf->dev.power.power_state.event)
- return 0;
+/* To disable USB, kernel command line is 'nousb' not 'usbcore.nousb' */
+#ifdef MODULE
+module_param(nousb, bool, 0444);
+#else
+core_param(nousb, nousb, bool, 0444);
+#endif
- if (driver->suspend)
- return driver->suspend(intf, message);
- return 0;
+/*
+ * for external read access to <nousb>
+ */
+int usb_disabled(void)
+{
+ return nousb;
}
+EXPORT_SYMBOL_GPL(usb_disabled);
-static int usb_generic_resume(struct device *dev)
+/*
+ * Notifications of device and interface registration
+ */
+static int usb_bus_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
{
- struct usb_interface *intf;
- struct usb_driver *driver;
-
- /* devices resume through their hub */
- if (dev->driver == &usb_generic_driver)
- return usb_resume_device (to_usb_device(dev));
-
- if ((dev->driver == NULL) ||
- (dev->driver_data == &usb_generic_driver_data))
- return 0;
-
- intf = to_usb_interface(dev);
- driver = to_usb_driver(dev->driver);
-
- if (driver->resume)
- return driver->resume(intf);
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (dev->type == &usb_device_type)
+ (void) usb_create_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ (void) usb_create_sysfs_intf_files(
+ to_usb_interface(dev));
+ break;
+
+ case BUS_NOTIFY_DEL_DEVICE:
+ if (dev->type == &usb_device_type)
+ usb_remove_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ usb_remove_sysfs_intf_files(to_usb_interface(dev));
+ break;
+ }
return 0;
}
-struct bus_type usb_bus_type = {
- .name = "usb",
- .match = usb_device_match,
- .hotplug = usb_hotplug,
- .suspend = usb_generic_suspend,
- .resume = usb_generic_resume,
+static struct notifier_block usb_bus_nb = {
+ .notifier_call = usb_bus_notify,
};
-#ifndef MODULE
+struct dentry *usb_debug_root;
+EXPORT_SYMBOL_GPL(usb_debug_root);
-static int __init usb_setup_disable(char *str)
-{
- nousb = 1;
- return 1;
-}
+static struct dentry *usb_debug_devices;
-/* format to disable USB on kernel command line is: nousb */
-__setup("nousb", usb_setup_disable);
+static int usb_debugfs_init(void)
+{
+ usb_debug_root = debugfs_create_dir("usb", NULL);
+ if (!usb_debug_root)
+ return -ENOENT;
+
+ usb_debug_devices = debugfs_create_file("devices", 0444,
+ usb_debug_root, NULL,
+ &usbfs_devices_fops);
+ if (!usb_debug_devices) {
+ debugfs_remove(usb_debug_root);
+ usb_debug_root = NULL;
+ return -ENOENT;
+ }
-#endif
+ return 0;
+}
-/*
- * for external read access to <nousb>
- */
-int usb_disabled(void)
+static void usb_debugfs_cleanup(void)
{
- return nousb;
+ debugfs_remove(usb_debug_devices);
+ debugfs_remove(usb_debug_root);
}
/*
{
int retval;
if (nousb) {
- pr_info ("%s: USB support disabled\n", usbcore_name);
+ pr_info("%s: USB support disabled\n", usbcore_name);
return 0;
}
- retval = bus_register(&usb_bus_type);
- if (retval)
+ retval = usb_debugfs_init();
+ if (retval)
+ goto out;
+
+ retval = ksuspend_usb_init();
+ if (retval)
goto out;
- retval = usb_host_init();
+ retval = bus_register(&usb_bus_type);
if (retval)
- goto host_init_failed;
+ goto bus_register_failed;
+ retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
+ if (retval)
+ goto bus_notifier_failed;
retval = usb_major_init();
if (retval)
goto major_init_failed;
+ retval = usb_register(&usbfs_driver);
+ if (retval)
+ goto driver_register_failed;
+ retval = usb_devio_init();
+ if (retval)
+ goto usb_devio_init_failed;
retval = usbfs_init();
if (retval)
goto fs_init_failed;
retval = usb_hub_init();
if (retval)
goto hub_init_failed;
-
- retval = driver_register(&usb_generic_driver);
+ retval = usb_register_device_driver(&usb_generic_driver, THIS_MODULE);
if (!retval)
goto out;
hub_init_failed:
usbfs_cleanup();
fs_init_failed:
- usb_major_cleanup();
+ usb_devio_cleanup();
+usb_devio_init_failed:
+ usb_deregister(&usbfs_driver);
+driver_register_failed:
+ usb_major_cleanup();
major_init_failed:
- usb_host_cleanup();
-host_init_failed:
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
+bus_notifier_failed:
bus_unregister(&usb_bus_type);
+bus_register_failed:
+ ksuspend_usb_cleanup();
out:
return retval;
}
if (nousb)
return;
- driver_unregister(&usb_generic_driver);
+ usb_deregister_device_driver(&usb_generic_driver);
usb_major_cleanup();
usbfs_cleanup();
+ usb_deregister(&usbfs_driver);
+ usb_devio_cleanup();
usb_hub_cleanup();
- usb_host_cleanup();
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
+ ksuspend_usb_cleanup();
+ usb_debugfs_cleanup();
}
subsys_initcall(usb_init);
module_exit(usb_exit);
-
-/*
- * USB may be built into the kernel or be built as modules.
- * These symbols are exported for device (or host controller)
- * driver modules to use.
- */
-
-EXPORT_SYMBOL(usb_register);
-EXPORT_SYMBOL(usb_deregister);
-EXPORT_SYMBOL(usb_disabled);
-
-EXPORT_SYMBOL_GPL(usb_get_intf);
-EXPORT_SYMBOL_GPL(usb_put_intf);
-
-EXPORT_SYMBOL(usb_alloc_dev);
-EXPORT_SYMBOL(usb_put_dev);
-EXPORT_SYMBOL(usb_get_dev);
-EXPORT_SYMBOL(usb_hub_tt_clear_buffer);
-
-EXPORT_SYMBOL(usb_lock_device);
-EXPORT_SYMBOL(usb_trylock_device);
-EXPORT_SYMBOL(usb_lock_device_for_reset);
-EXPORT_SYMBOL(usb_unlock_device);
-
-EXPORT_SYMBOL(usb_driver_claim_interface);
-EXPORT_SYMBOL(usb_driver_release_interface);
-EXPORT_SYMBOL(usb_match_id);
-EXPORT_SYMBOL(usb_find_interface);
-EXPORT_SYMBOL(usb_ifnum_to_if);
-EXPORT_SYMBOL(usb_altnum_to_altsetting);
-
-EXPORT_SYMBOL(usb_reset_device);
-EXPORT_SYMBOL(usb_disconnect);
-
-EXPORT_SYMBOL(__usb_get_extra_descriptor);
-
-EXPORT_SYMBOL(usb_find_device);
-EXPORT_SYMBOL(usb_get_current_frame_number);
-
-EXPORT_SYMBOL (usb_buffer_alloc);
-EXPORT_SYMBOL (usb_buffer_free);
-
-#if 0
-EXPORT_SYMBOL (usb_buffer_map);
-EXPORT_SYMBOL (usb_buffer_dmasync);
-EXPORT_SYMBOL (usb_buffer_unmap);
-#endif
-
-EXPORT_SYMBOL (usb_buffer_map_sg);
-#if 0
-EXPORT_SYMBOL (usb_buffer_dmasync_sg);
-#endif
-EXPORT_SYMBOL (usb_buffer_unmap_sg);
-
MODULE_LICENSE("GPL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff