diff options
Diffstat (limited to 'drivers/usb/core/usb.c')
| -rw-r--r-- | drivers/usb/core/usb.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index b28a31b20308..0b8c67bcde60 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -112,87 +112,6 @@ struct usb_host_interface *usb_altnum_to_altsetting(struct usb_interface *intf, return NULL; } -/** - * 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) -{ - struct device *dev = &iface->dev; - - if (dev->driver) - return -EBUSY; - - dev->driver = &driver->driver; - usb_set_intfdata(iface, priv); - iface->condition = USB_INTERFACE_BOUND; - mark_active(iface); - - /* if interface was already added, bind now; else let - * the future device_add() bind it, bypassing probe() - */ - if (device_is_registered(dev)) - device_bind_driver(dev); - - 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. - * - * 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. - */ -void usb_driver_release_interface(struct usb_driver *driver, - struct usb_interface *iface) -{ - struct device *dev = &iface->dev; - - /* this should never happen, don't release something that's not ours */ - if (!dev->driver || dev->driver != &driver->driver) - return; - - /* don't release from within disconnect() */ - if (iface->condition != USB_INTERFACE_BOUND) - return; - - /* don't release if the interface hasn't been added yet */ - if (device_is_registered(dev)) { - iface->condition = USB_INTERFACE_UNBINDING; - device_release_driver(dev); - } - - dev->driver = NULL; - usb_set_intfdata(iface, NULL); - iface->condition = USB_INTERFACE_UNBOUND; - mark_quiesced(iface); -} - struct find_interface_arg { int minor; struct usb_interface *interface; @@ -234,120 +153,6 @@ struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor) return argb.interface; } -#ifdef CONFIG_HOTPLUG - -/* - * This sends an uevent to userspace, 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_uevent(struct device *dev, char **envp, int num_envp, - char *buffer, int buffer_size) -{ - struct usb_interface *intf; - struct usb_device *usb_dev; - struct usb_host_interface *alt; - int i = 0; - int length = 0; - - if (!dev) - return -ENODEV; - - /* driver is often null here; dev_dbg() would oops */ - pr_debug ("usb %s: uevent\n", dev->bus_id); - - /* 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; - - intf = to_usb_interface(dev); - usb_dev = interface_to_usbdev (intf); - alt = intf->cur_altsetting; - - 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; - } - -#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_uevent_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 - - /* per-device configurations are common */ - if (add_uevent_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; - - /* class-based driver binding models */ - if (add_uevent_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; - - if (add_uevent_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_uevent_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; - - envp[i] = NULL; - - return 0; -} - -#else - -static int usb_uevent(struct device *dev, char **envp, - int num_envp, char *buffer, int buffer_size) -{ - return -ENODEV; -} - -#endif /* CONFIG_HOTPLUG */ - /** * usb_release_dev - free a usb device structure when all users of it are finished. * @dev: device that's been disconnected @@ -990,116 +795,6 @@ void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe, usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE); } -static int verify_suspended(struct device *dev, void *unused) -{ - if (dev->driver == NULL) - return 0; - return (dev->power.power_state.event == PM_EVENT_ON) ? -EBUSY : 0; -} - -static int usb_generic_suspend(struct device *dev, pm_message_t message) -{ - struct usb_interface *intf; - struct usb_driver *driver; - int status; - - /* USB devices enter SUSPEND state through their hubs, but can be - * marked for FREEZE as soon as their children are already idled. - * But those semantics are useless, so we equate the two (sigh). - */ - if (dev->driver == &usb_generic_driver) { - if (dev->power.power_state.event == message.event) - return 0; - /* we need to rule out bogus requests through sysfs */ - status = device_for_each_child(dev, NULL, verify_suspended); - if (status) - return status; - return usb_port_suspend(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); - - /* with no hardware, USB interfaces only use FREEZE and ON states */ - if (!is_active(intf)) - return 0; - - if (driver->suspend && driver->resume) { - status = driver->suspend(intf, message); - if (status) - dev_err(dev, "%s error %d\n", "suspend", status); - else - mark_quiesced(intf); - } else { - // FIXME else if there's no suspend method, disconnect... - dev_warn(dev, "no suspend for driver %s?\n", driver->name); - mark_quiesced(intf); - status = 0; - } - return status; -} - -static int usb_generic_resume(struct device *dev) -{ - struct usb_interface *intf; - struct usb_driver *driver; - struct usb_device *udev; - int status; - - if (dev->power.power_state.event == PM_EVENT_ON) - return 0; - - /* mark things as "on" immediately, no matter what errors crop up */ - dev->power.power_state.event = PM_EVENT_ON; - - /* devices resume through their hubs */ - if (dev->driver == &usb_generic_driver) { - udev = to_usb_device(dev); - if (udev->state == USB_STATE_NOTATTACHED) - return 0; - return usb_port_resume(udev); - } - - if ((dev->driver == NULL) || - (dev->driver_data == &usb_generic_driver_data)) { - dev->power.power_state.event = PM_EVENT_FREEZE; - return 0; - } - - intf = to_usb_interface(dev); - driver = to_usb_driver(dev->driver); - - udev = interface_to_usbdev(intf); - if (udev->state == USB_STATE_NOTATTACHED) - return 0; - - /* if driver was suspended, it has a resume method; - * however, sysfs can wrongly mark things as suspended - * (on the "no suspend method" FIXME path above) - */ - if (driver->resume) { - status = driver->resume(intf); - if (status) { - dev_err(dev, "%s error %d\n", "resume", status); - mark_quiesced(intf); - } - } else - dev_warn(dev, "no resume for driver %s?\n", driver->name); - return 0; -} - -struct bus_type usb_bus_type = { - .name = "usb", - .match = usb_device_match, - .uevent = usb_uevent, - .suspend = usb_generic_suspend, - .resume = usb_generic_resume, -}; - /* format to disable USB on kernel command line is: nousb */ __module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444); @@ -1203,8 +898,6 @@ EXPORT_SYMBOL(usb_hub_tt_clear_buffer); EXPORT_SYMBOL(usb_lock_device_for_reset); -EXPORT_SYMBOL(usb_driver_claim_interface); -EXPORT_SYMBOL(usb_driver_release_interface); EXPORT_SYMBOL(usb_find_interface); EXPORT_SYMBOL(usb_ifnum_to_if); EXPORT_SYMBOL(usb_altnum_to_altsetting); |