Lines Matching +full:device +full:- +full:id
1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/usb/core/driver.c - most of the driver model stuff for usb
5 * (C) Copyright 2005 Greg Kroah-Hartman <[email protected]>
9 * (C) Copyright Johannes Erdfelt 1999-2001
14 * (C) Copyright David Brownell 2000-2004
17 * (C) Copyright Greg Kroah-Hartman 2002-2003
28 #include <linux/device.h>
39 * Adds a new dynamic USBdevice ID to this driver,
58 return -EINVAL; in usb_store_new_id()
62 return -ENOMEM; in usb_store_new_id()
64 INIT_LIST_HEAD(&dynid->node); in usb_store_new_id()
65 dynid->id.idVendor = idVendor; in usb_store_new_id()
66 dynid->id.idProduct = idProduct; in usb_store_new_id()
67 dynid->id.match_flags = USB_DEVICE_ID_MATCH_DEVICE; in usb_store_new_id()
70 retval = -EINVAL; in usb_store_new_id()
74 dynid->id.bInterfaceClass = (u8)bInterfaceClass; in usb_store_new_id()
75 dynid->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS; in usb_store_new_id()
79 const struct usb_device_id *id = id_table; in usb_store_new_id() local
81 if (!id) { in usb_store_new_id()
82 retval = -ENODEV; in usb_store_new_id()
86 for (; id->match_flags; id++) in usb_store_new_id()
87 if (id->idVendor == refVendor && id->idProduct == refProduct) in usb_store_new_id()
90 if (id->match_flags) { in usb_store_new_id()
91 dynid->id.driver_info = id->driver_info; in usb_store_new_id()
93 retval = -ENODEV; in usb_store_new_id()
99 list_add_tail(&dynid->node, &dynids->list); in usb_store_new_id()
120 list_for_each_entry(dynid, &dynids->list, node) in usb_show_dynids()
121 if (dynid->id.bInterfaceClass != 0) in usb_show_dynids()
122 count += scnprintf(&buf[count], PAGE_SIZE - count, "%04x %04x %02x\n", in usb_show_dynids()
123 dynid->id.idVendor, dynid->id.idProduct, in usb_show_dynids()
124 dynid->id.bInterfaceClass); in usb_show_dynids()
126 count += scnprintf(&buf[count], PAGE_SIZE - count, "%04x %04x\n", in usb_show_dynids()
127 dynid->id.idVendor, dynid->id.idProduct); in usb_show_dynids()
136 return usb_show_dynids(&usb_drv->dynids, buf); in new_id_show()
144 return usb_store_new_id(&usb_drv->dynids, usb_drv->id_table, driver, buf, count); in new_id_store()
149 * Remove a USB device ID from this driver
162 return -EINVAL; in remove_id_store()
165 list_for_each_entry_safe(dynid, n, &usb_driver->dynids.list, node) { in remove_id_store()
166 struct usb_device_id *id = &dynid->id; in remove_id_store() local
168 if ((id->idVendor == idVendor) && in remove_id_store()
169 (id->idProduct == idProduct)) { in remove_id_store()
170 list_del(&dynid->node); in remove_id_store()
188 if (usb_drv->no_dynamic_id) in usb_create_newid_files()
191 if (usb_drv->probe != NULL) { in usb_create_newid_files()
192 error = driver_create_file(&usb_drv->driver, in usb_create_newid_files()
195 error = driver_create_file(&usb_drv->driver, in usb_create_newid_files()
198 driver_remove_file(&usb_drv->driver, in usb_create_newid_files()
208 if (usb_drv->no_dynamic_id) in usb_remove_newid_files()
211 if (usb_drv->probe != NULL) { in usb_remove_newid_files()
212 driver_remove_file(&usb_drv->driver, in usb_remove_newid_files()
214 driver_remove_file(&usb_drv->driver, in usb_remove_newid_files()
224 list_for_each_entry_safe(dynid, n, &usb_drv->dynids.list, node) { in usb_free_dynids()
225 list_del(&dynid->node); in usb_free_dynids()
236 list_for_each_entry(dynid, &drv->dynids.list, node) { in usb_match_dynamic_id()
237 if (usb_match_one_id(intf, &dynid->id)) { in usb_match_dynamic_id()
238 return &dynid->id; in usb_match_dynamic_id()
246 static int usb_probe_device(struct device *dev) in usb_probe_device()
248 struct usb_device_driver *udriver = to_usb_device_driver(dev->driver); in usb_probe_device()
256 /* The device should always appear to be in use in usb_probe_device()
259 if (!udriver->supports_autosuspend) in usb_probe_device()
264 if (udriver->generic_subclass) in usb_probe_device()
269 /* Probe the USB device with the driver in hand, but only in usb_probe_device()
271 * device driver has an id_table or a match function; i.e., in usb_probe_device()
272 * when the device driver was explicitly matched against in usb_probe_device()
273 * a device. in usb_probe_device()
275 * If the device driver does not have either of these, in usb_probe_device()
276 * then we assume that it can bind to any device and is in usb_probe_device()
277 * not truly a more specialized/non-generic driver, so a in usb_probe_device()
278 * return value of -ENODEV should not force the device in usb_probe_device()
280 * can still be another, more specialized, device driver. in usb_probe_device()
285 * specialized USB device drivers for a particular device? in usb_probe_device()
287 * specialised device drivers prior to setting the in usb_probe_device()
290 if (udriver->probe) in usb_probe_device()
291 error = udriver->probe(udev); in usb_probe_device()
292 else if (!udriver->generic_subclass) in usb_probe_device()
293 error = -EINVAL; in usb_probe_device()
294 if (error == -ENODEV && udriver != &usb_generic_driver && in usb_probe_device()
295 (udriver->id_table || udriver->match)) { in usb_probe_device()
296 udev->use_generic_driver = 1; in usb_probe_device()
297 return -EPROBE_DEFER; in usb_probe_device()
303 static int usb_unbind_device(struct device *dev) in usb_unbind_device()
306 struct usb_device_driver *udriver = to_usb_device_driver(dev->driver); in usb_unbind_device()
308 if (udriver->disconnect) in usb_unbind_device()
309 udriver->disconnect(udev); in usb_unbind_device()
310 if (udriver->generic_subclass) in usb_unbind_device()
312 if (!udriver->supports_autosuspend) in usb_unbind_device()
318 static int usb_probe_interface(struct device *dev) in usb_probe_interface()
320 struct usb_driver *driver = to_usb_driver(dev->driver); in usb_probe_interface()
323 const struct usb_device_id *id; in usb_probe_interface() local
324 int error = -ENODEV; in usb_probe_interface()
325 int lpm_disable_error = -ENODEV; in usb_probe_interface()
329 intf->needs_binding = 0; in usb_probe_interface()
334 if (udev->authorized == 0) { in usb_probe_interface()
335 dev_err(&intf->dev, "Device is not authorized for usage\n"); in usb_probe_interface()
337 } else if (intf->authorized == 0) { in usb_probe_interface()
338 dev_err(&intf->dev, "Interface %d is not authorized for usage\n", in usb_probe_interface()
339 intf->altsetting->desc.bInterfaceNumber); in usb_probe_interface()
343 id = usb_match_dynamic_id(intf, driver); in usb_probe_interface()
344 if (!id) in usb_probe_interface()
345 id = usb_match_id(intf, driver->id_table); in usb_probe_interface()
346 if (!id) in usb_probe_interface()
349 dev_dbg(dev, "%s - got id\n", __func__); in usb_probe_interface()
355 intf->condition = USB_INTERFACE_BINDING; in usb_probe_interface()
358 * runtime-PM-enabled only if the driver has autosuspend support. in usb_probe_interface()
363 if (driver->supports_autosuspend) in usb_probe_interface()
366 /* If the new driver doesn't allow hub-initiated LPM, and we can't in usb_probe_interface()
367 * disable hub-initiated LPM, then fail the probe. in usb_probe_interface()
377 if (driver->disable_hub_initiated_lpm) { in usb_probe_interface()
380 dev_err(&intf->dev, "%s Failed to disable LPM for driver %s\n", in usb_probe_interface()
381 __func__, driver->name); in usb_probe_interface()
388 if (intf->needs_altsetting0) { in usb_probe_interface()
389 error = usb_set_interface(udev, intf->altsetting[0]. in usb_probe_interface()
393 intf->needs_altsetting0 = 0; in usb_probe_interface()
396 error = driver->probe(intf, id); in usb_probe_interface()
400 intf->condition = USB_INTERFACE_BOUND; in usb_probe_interface()
411 intf->needs_remote_wakeup = 0; in usb_probe_interface()
412 intf->condition = USB_INTERFACE_UNBOUND; in usb_probe_interface()
418 /* Unbound interfaces are always runtime-PM-disabled and -suspended */ in usb_probe_interface()
419 if (driver->supports_autosuspend) in usb_probe_interface()
428 static int usb_unbind_interface(struct device *dev) in usb_unbind_interface()
430 struct usb_driver *driver = to_usb_driver(dev->driver); in usb_unbind_interface()
435 int lpm_disable_error = -ENODEV; in usb_unbind_interface()
437 intf->condition = USB_INTERFACE_UNBINDING; in usb_unbind_interface()
443 /* If hub-initiated LPM policy may change, attempt to disable LPM until in usb_unbind_interface()
446 * hub-initiated LPM. in usb_unbind_interface()
448 if (driver->disable_hub_initiated_lpm) in usb_unbind_interface()
453 * supports "soft" unbinding and the device is still present. in usb_unbind_interface()
455 if (!driver->soft_unbind || udev->state == USB_STATE_NOTATTACHED) in usb_unbind_interface()
458 driver->disconnect(intf); in usb_unbind_interface()
461 for (i = 0, j = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { in usb_unbind_interface()
462 ep = &intf->cur_altsetting->endpoint[i]; in usb_unbind_interface()
463 if (ep->streams == 0) in usb_unbind_interface()
479 * We cannot do a Set-Interface if the device is suspended or in usb_unbind_interface()
481 * altsetting means creating new endpoint device entries). in usb_unbind_interface()
482 * When either of these happens, defer the Set-Interface. in usb_unbind_interface()
484 if (intf->cur_altsetting->desc.bAlternateSetting == 0) { in usb_unbind_interface()
485 /* Already in altsetting 0 so skip Set-Interface. in usb_unbind_interface()
486 * Just re-enable it without affecting the endpoint toggles. in usb_unbind_interface()
489 } else if (!error && !intf->dev.power.is_prepared) { in usb_unbind_interface()
490 r = usb_set_interface(udev, intf->altsetting[0]. in usb_unbind_interface()
493 intf->needs_altsetting0 = 1; in usb_unbind_interface()
495 intf->needs_altsetting0 = 1; in usb_unbind_interface()
499 intf->condition = USB_INTERFACE_UNBOUND; in usb_unbind_interface()
500 intf->needs_remote_wakeup = 0; in usb_unbind_interface()
502 /* Attempt to re-enable USB3 LPM, if the disable succeeded. */ in usb_unbind_interface()
506 /* Unbound interfaces are always runtime-PM-disabled and -suspended */ in usb_unbind_interface()
507 if (driver->supports_autosuspend) in usb_unbind_interface()
517 static void usb_shutdown_interface(struct device *dev) in usb_shutdown_interface()
522 if (!dev->driver) in usb_shutdown_interface()
525 driver = to_usb_driver(dev->driver); in usb_shutdown_interface()
526 if (driver->shutdown) in usb_shutdown_interface()
527 driver->shutdown(intf); in usb_shutdown_interface()
531 * usb_driver_claim_interface - bind a driver to an interface
534 * usb device's active configuration
537 * This is used by usb device drivers that need to claim more than one
538 * interface on a device when probing (audio and acm are current examples).
539 * No device driver should directly modify internal usb_interface or
542 * Callers must own the device lock, so driver probe() entries don't need
551 struct device *dev; in usb_driver_claim_interface()
555 return -ENODEV; in usb_driver_claim_interface()
557 dev = &iface->dev; in usb_driver_claim_interface()
558 if (dev->driver) in usb_driver_claim_interface()
559 return -EBUSY; in usb_driver_claim_interface()
562 if (!iface->authorized) in usb_driver_claim_interface()
563 return -ENODEV; in usb_driver_claim_interface()
565 dev->driver = &driver->driver; in usb_driver_claim_interface()
567 iface->needs_binding = 0; in usb_driver_claim_interface()
569 iface->condition = USB_INTERFACE_BOUND; in usb_driver_claim_interface()
572 * runtime-PM-enabled, but only if the driver has autosuspend in usb_driver_claim_interface()
574 * device from being autosuspended, but left disabled. In either in usb_driver_claim_interface()
578 if (driver->supports_autosuspend) in usb_driver_claim_interface()
590 dev->driver = NULL; in usb_driver_claim_interface()
592 iface->needs_remote_wakeup = 0; in usb_driver_claim_interface()
593 iface->condition = USB_INTERFACE_UNBOUND; in usb_driver_claim_interface()
596 * Unbound interfaces are always runtime-PM-disabled in usb_driver_claim_interface()
597 * and runtime-PM-suspended in usb_driver_claim_interface()
599 if (driver->supports_autosuspend) in usb_driver_claim_interface()
609 * usb_driver_release_interface - unbind a driver from an interface
618 * Callers must own the device lock, so driver disconnect() entries don't
625 struct device *dev = &iface->dev; in usb_driver_release_interface()
628 if (!dev->driver || dev->driver != &driver->driver) in usb_driver_release_interface()
632 if (iface->condition != USB_INTERFACE_BOUND) in usb_driver_release_interface()
634 iface->condition = USB_INTERFACE_UNBINDING; in usb_driver_release_interface()
644 dev->driver = NULL; in usb_driver_release_interface()
651 int usb_match_device(struct usb_device *dev, const struct usb_device_id *id) in usb_match_device() argument
653 if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && in usb_match_device()
654 id->idVendor != le16_to_cpu(dev->descriptor.idVendor)) in usb_match_device()
657 if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) && in usb_match_device()
658 id->idProduct != le16_to_cpu(dev->descriptor.idProduct)) in usb_match_device()
661 /* No need to test id->bcdDevice_lo != 0, since 0 is never in usb_match_device()
663 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) && in usb_match_device()
664 (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice))) in usb_match_device()
667 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) && in usb_match_device()
668 (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice))) in usb_match_device()
671 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) && in usb_match_device()
672 (id->bDeviceClass != dev->descriptor.bDeviceClass)) in usb_match_device()
675 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) && in usb_match_device()
676 (id->bDeviceSubClass != dev->descriptor.bDeviceSubClass)) in usb_match_device()
679 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) && in usb_match_device()
680 (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol)) in usb_match_device()
689 const struct usb_device_id *id) in usb_match_one_id_intf() argument
692 * checked for a match if the device class is Vendor Specific, in usb_match_one_id_intf()
693 * unless the match record specifies the Vendor ID. */ in usb_match_one_id_intf()
694 if (dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC && in usb_match_one_id_intf()
695 !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && in usb_match_one_id_intf()
696 (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS | in usb_match_one_id_intf()
702 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) && in usb_match_one_id_intf()
703 (id->bInterfaceClass != intf->desc.bInterfaceClass)) in usb_match_one_id_intf()
706 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) && in usb_match_one_id_intf()
707 (id->bInterfaceSubClass != intf->desc.bInterfaceSubClass)) in usb_match_one_id_intf()
710 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) && in usb_match_one_id_intf()
711 (id->bInterfaceProtocol != intf->desc.bInterfaceProtocol)) in usb_match_one_id_intf()
714 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) && in usb_match_one_id_intf()
715 (id->bInterfaceNumber != intf->desc.bInterfaceNumber)) in usb_match_one_id_intf()
723 const struct usb_device_id *id) in usb_match_one_id() argument
728 /* proc_connectinfo in devio.c may call us with id == NULL. */ in usb_match_one_id()
729 if (id == NULL) in usb_match_one_id()
732 intf = interface->cur_altsetting; in usb_match_one_id()
735 if (!usb_match_device(dev, id)) in usb_match_one_id()
738 return usb_match_one_id_intf(dev, intf, id); in usb_match_one_id()
743 * usb_match_id - find first usb_device_id matching device or interface
745 * @id: array of usb_device_id structures, terminated by zero entry
748 * the first one matching the device or interface, or null.
750 * Most USB device drivers will use this indirectly, through the usb core,
752 * These device tables are exported with MODULE_DEVICE_TABLE, through
762 * in the device or interface descriptor, or else the device_id
765 * "driver_info" is normally used only by device drivers,
767 * as a driver's "modules.usbmap" entry if you provide an id with
768 * only a nonzero "driver_info" field. If you do this, the USB device
775 * driver selection must come from smart driver id records.
781 * The most specific match specifiers use device descriptor
782 * data. These are commonly used with product-specific matches;
788 * Matches based on device class/subclass/protocol specifications
790 * its siblings. These are used with single-function devices
796 * multiple-function device. Use the USB_INTERFACE_INFO
797 * macro, or its siblings, to match class-per-interface style
801 * any interface if the device class is set to Vendor-Specific.
804 * vendor-specific, and hence matching against a standard product
806 * interface-based match for such a device, create a match record
807 * that also specifies the vendor ID. (Unforunately there isn't a
816 const struct usb_device_id *id) in usb_match_id() argument
818 /* proc_connectinfo in devio.c may call us with id == NULL. */ in usb_match_id()
819 if (id == NULL) in usb_match_id()
822 /* It is important to check that id->driver_info is nonzero, in usb_match_id()
824 id->driver_info is the way to create an entry that in usb_match_id()
826 device and interface. */ in usb_match_id()
827 for (; id->idVendor || id->idProduct || id->bDeviceClass || in usb_match_id()
828 id->bInterfaceClass || id->driver_info; id++) { in usb_match_id()
829 if (usb_match_one_id(interface, id)) in usb_match_id()
830 return id; in usb_match_id()
838 const struct usb_device_id *id) in usb_device_match_id() argument
840 if (!id) in usb_device_match_id()
843 for (; id->idVendor || id->idProduct ; id++) { in usb_device_match_id()
844 if (usb_match_device(udev, id)) in usb_device_match_id()
845 return id; in usb_device_match_id()
855 if (udrv->id_table && udrv->match) in usb_driver_applicable()
856 return usb_device_match_id(udev, udrv->id_table) != NULL && in usb_driver_applicable()
857 udrv->match(udev); in usb_driver_applicable()
859 if (udrv->id_table) in usb_driver_applicable()
860 return usb_device_match_id(udev, udrv->id_table) != NULL; in usb_driver_applicable()
862 if (udrv->match) in usb_driver_applicable()
863 return udrv->match(udev); in usb_driver_applicable()
868 static int usb_device_match(struct device *dev, const struct device_driver *drv) in usb_device_match()
882 /* If the device driver under consideration does not have a in usb_device_match()
886 if (!udrv->id_table && !udrv->match) in usb_device_match()
894 const struct usb_device_id *id; in usb_device_match() local
896 /* device drivers never match interfaces */ in usb_device_match()
903 id = usb_match_id(intf, usb_drv->id_table); in usb_device_match()
904 if (id) in usb_device_match()
907 id = usb_match_dynamic_id(intf, usb_drv); in usb_device_match()
908 if (id) in usb_device_match()
915 static int usb_uevent(const struct device *dev, struct kobj_uevent_env *env) in usb_uevent()
929 if (usb_dev->devnum < 0) { in usb_uevent()
932 return -ENODEV; in usb_uevent()
934 if (!usb_dev->bus) { in usb_uevent()
936 return -ENODEV; in usb_uevent()
939 /* per-device configurations are common */ in usb_uevent()
941 le16_to_cpu(usb_dev->descriptor.idVendor), in usb_uevent()
942 le16_to_cpu(usb_dev->descriptor.idProduct), in usb_uevent()
943 le16_to_cpu(usb_dev->descriptor.bcdDevice))) in usb_uevent()
944 return -ENOMEM; in usb_uevent()
946 /* class-based driver binding models */ in usb_uevent()
948 usb_dev->descriptor.bDeviceClass, in usb_uevent()
949 usb_dev->descriptor.bDeviceSubClass, in usb_uevent()
950 usb_dev->descriptor.bDeviceProtocol)) in usb_uevent()
951 return -ENOMEM; in usb_uevent()
956 static int __usb_bus_reprobe_drivers(struct device *dev, void *data) in __usb_bus_reprobe_drivers()
963 if (dev->driver != &usb_generic_driver.driver) in __usb_bus_reprobe_drivers()
971 if (ret && ret != -EPROBE_DEFER) in __usb_bus_reprobe_drivers()
972 dev_err(dev, "Failed to reprobe device (error %d)\n", ret); in __usb_bus_reprobe_drivers()
979 return drv->probe == usb_probe_device; in is_usb_device_driver()
983 * usb_register_device_driver - register a USB device (not interface) driver
984 * @new_udriver: USB operations for the device driver
987 * Registers a USB device driver with the USB core. The list of
999 return -ENODEV; in usb_register_device_driver()
1001 new_udriver->driver.name = new_udriver->name; in usb_register_device_driver()
1002 new_udriver->driver.bus = &usb_bus_type; in usb_register_device_driver()
1003 new_udriver->driver.probe = usb_probe_device; in usb_register_device_driver()
1004 new_udriver->driver.remove = usb_unbind_device; in usb_register_device_driver()
1005 new_udriver->driver.owner = owner; in usb_register_device_driver()
1006 new_udriver->driver.dev_groups = new_udriver->dev_groups; in usb_register_device_driver()
1008 retval = driver_register(&new_udriver->driver); in usb_register_device_driver()
1011 pr_info("%s: registered new device driver %s\n", in usb_register_device_driver()
1012 usbcore_name, new_udriver->name); in usb_register_device_driver()
1014 * Check whether any device could be better served with in usb_register_device_driver()
1020 pr_err("%s: error %d registering device driver %s\n", in usb_register_device_driver()
1021 usbcore_name, retval, new_udriver->name); in usb_register_device_driver()
1029 * usb_deregister_device_driver - unregister a USB device (not interface) driver
1030 * @udriver: USB operations of the device driver to unregister
1037 pr_info("%s: deregistering device driver %s\n", in usb_deregister_device_driver()
1038 usbcore_name, udriver->name); in usb_deregister_device_driver()
1040 driver_unregister(&udriver->driver); in usb_deregister_device_driver()
1045 * usb_register_driver - register a USB interface driver
1066 return -ENODEV; in usb_register_driver()
1068 new_driver->driver.name = new_driver->name; in usb_register_driver()
1069 new_driver->driver.bus = &usb_bus_type; in usb_register_driver()
1070 new_driver->driver.probe = usb_probe_interface; in usb_register_driver()
1071 new_driver->driver.remove = usb_unbind_interface; in usb_register_driver()
1072 new_driver->driver.shutdown = usb_shutdown_interface; in usb_register_driver()
1073 new_driver->driver.owner = owner; in usb_register_driver()
1074 new_driver->driver.mod_name = mod_name; in usb_register_driver()
1075 new_driver->driver.dev_groups = new_driver->dev_groups; in usb_register_driver()
1076 INIT_LIST_HEAD(&new_driver->dynids.list); in usb_register_driver()
1078 retval = driver_register(&new_driver->driver); in usb_register_driver()
1087 usbcore_name, new_driver->name); in usb_register_driver()
1092 driver_unregister(&new_driver->driver); in usb_register_driver()
1095 usbcore_name, retval, new_driver->name); in usb_register_driver()
1101 * usb_deregister - unregister a USB interface driver
1114 usbcore_name, driver->name); in usb_deregister()
1117 driver_unregister(&driver->driver); in usb_deregister()
1126 * The caller must hold @intf's device's lock, but not @intf's lock.
1130 struct usb_driver *driver = to_usb_driver(intf->dev.driver); in usb_forced_unbind_intf()
1132 dev_dbg(&intf->dev, "forced unbind\n"); in usb_forced_unbind_intf()
1136 intf->needs_binding = 1; in usb_forced_unbind_intf()
1143 * The caller must hold @udev's device lock.
1151 config = udev->actconfig; in unbind_marked_interfaces()
1153 for (i = 0; i < config->desc.bNumInterfaces; ++i) { in unbind_marked_interfaces()
1154 intf = config->interface[i]; in unbind_marked_interfaces()
1155 if (intf->dev.driver && intf->needs_binding) in unbind_marked_interfaces()
1164 * The caller must hold @intf's device's lock, but not @intf's lock.
1174 if (intf->dev.driver) in usb_rebind_intf()
1178 if (!intf->dev.power.is_prepared) { in usb_rebind_intf()
1179 intf->needs_binding = 0; in usb_rebind_intf()
1180 rc = device_attach(&intf->dev); in usb_rebind_intf()
1181 if (rc < 0 && rc != -EPROBE_DEFER) in usb_rebind_intf()
1182 dev_warn(&intf->dev, "rebind failed: %d\n", rc); in usb_rebind_intf()
1190 * The caller must hold @udev's device lock.
1198 config = udev->actconfig; in rebind_marked_interfaces()
1200 for (i = 0; i < config->desc.bNumInterfaces; ++i) { in rebind_marked_interfaces()
1201 intf = config->interface[i]; in rebind_marked_interfaces()
1202 if (intf->needs_binding) in rebind_marked_interfaces()
1213 * The caller must hold @udev's device lock.
1227 * The caller must hold @udev's device lock.
1236 config = udev->actconfig; in unbind_no_pm_drivers_interfaces()
1238 for (i = 0; i < config->desc.bNumInterfaces; ++i) { in unbind_no_pm_drivers_interfaces()
1239 intf = config->interface[i]; in unbind_no_pm_drivers_interfaces()
1241 if (intf->dev.driver) { in unbind_no_pm_drivers_interfaces()
1242 drv = to_usb_driver(intf->dev.driver); in unbind_no_pm_drivers_interfaces()
1243 if (!drv->suspend || !drv->resume) in unbind_no_pm_drivers_interfaces()
1255 if (udev->state == USB_STATE_NOTATTACHED || in usb_suspend_device()
1256 udev->state == USB_STATE_SUSPENDED) in usb_suspend_device()
1260 if (udev->dev.driver) in usb_suspend_device()
1261 udriver = to_usb_device_driver(udev->dev.driver); in usb_suspend_device()
1263 udev->do_remote_wakeup = 0; in usb_suspend_device()
1266 if (udriver->suspend) in usb_suspend_device()
1267 status = udriver->suspend(udev, msg); in usb_suspend_device()
1268 if (status == 0 && udriver->generic_subclass) in usb_suspend_device()
1272 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_suspend_device()
1281 if (udev->state == USB_STATE_NOTATTACHED) in usb_resume_device()
1285 if (udev->dev.driver == NULL) { in usb_resume_device()
1286 status = -ENOTCONN; in usb_resume_device()
1290 /* Non-root devices on a full/low-speed bus must wait for their in usb_resume_device()
1291 * companion high-speed root hub, in case a handoff is needed. in usb_resume_device()
1293 if (!PMSG_IS_AUTO(msg) && udev->parent && udev->bus->hs_companion) in usb_resume_device()
1294 device_pm_wait_for_dev(&udev->dev, in usb_resume_device()
1295 &udev->bus->hs_companion->root_hub->dev); in usb_resume_device()
1297 if (udev->quirks & USB_QUIRK_RESET_RESUME) in usb_resume_device()
1298 udev->reset_resume = 1; in usb_resume_device()
1300 udriver = to_usb_device_driver(udev->dev.driver); in usb_resume_device()
1301 if (udriver->generic_subclass) in usb_resume_device()
1303 if (status == 0 && udriver->resume) in usb_resume_device()
1304 status = udriver->resume(udev, msg); in usb_resume_device()
1307 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_resume_device()
1317 if (udev->state == USB_STATE_NOTATTACHED || in usb_suspend_interface()
1318 intf->condition == USB_INTERFACE_UNBOUND) in usb_suspend_interface()
1320 driver = to_usb_driver(intf->dev.driver); in usb_suspend_interface()
1323 status = driver->suspend(intf, msg); in usb_suspend_interface()
1325 dev_err(&intf->dev, "suspend error %d\n", status); in usb_suspend_interface()
1328 dev_vdbg(&intf->dev, "%s: status %d\n", __func__, status); in usb_suspend_interface()
1338 if (udev->state == USB_STATE_NOTATTACHED) in usb_resume_interface()
1342 if (intf->condition == USB_INTERFACE_UNBINDING) in usb_resume_interface()
1346 if (intf->condition == USB_INTERFACE_UNBOUND) { in usb_resume_interface()
1349 if (intf->needs_altsetting0 && !intf->dev.power.is_prepared) { in usb_resume_interface()
1350 usb_set_interface(udev, intf->altsetting[0]. in usb_resume_interface()
1352 intf->needs_altsetting0 = 0; in usb_resume_interface()
1358 if (intf->needs_binding) in usb_resume_interface()
1360 driver = to_usb_driver(intf->dev.driver); in usb_resume_interface()
1363 if (driver->reset_resume) { in usb_resume_interface()
1364 status = driver->reset_resume(intf); in usb_resume_interface()
1366 dev_err(&intf->dev, "%s error %d\n", in usb_resume_interface()
1369 intf->needs_binding = 1; in usb_resume_interface()
1370 dev_dbg(&intf->dev, "no reset_resume for driver %s?\n", in usb_resume_interface()
1371 driver->name); in usb_resume_interface()
1374 status = driver->resume(intf); in usb_resume_interface()
1376 dev_err(&intf->dev, "resume error %d\n", status); in usb_resume_interface()
1380 dev_vdbg(&intf->dev, "%s: status %d\n", __func__, status); in usb_resume_interface()
1387 * usb_suspend_both - suspend a USB device and its interfaces
1396 * state as the device, but when called from system sleep, all error
1397 * from suspend methods of interfaces and the non-root-hub device itself
1399 * to the device's state when @udev is root-hub and its suspend method
1402 * Autosuspend requests originating from a child device or an interface
1403 * driver may be made without the protection of @udev's device lock, but
1419 if (udev->state == USB_STATE_NOTATTACHED || in usb_suspend_both()
1420 udev->state == USB_STATE_SUSPENDED) in usb_suspend_both()
1424 if (udev->actconfig) { in usb_suspend_both()
1425 n = udev->actconfig->desc.bNumInterfaces; in usb_suspend_both()
1426 for (i = n - 1; i >= 0; --i) { in usb_suspend_both()
1427 intf = udev->actconfig->interface[i]; in usb_suspend_both()
1441 * Ignore errors from non-root-hub devices during in usb_suspend_both()
1446 if (udev->parent && !PMSG_IS_AUTO(msg)) in usb_suspend_both()
1450 * If the device is inaccessible, don't try to resume in usb_suspend_both()
1453 if (status && status != -EBUSY) { in usb_suspend_both()
1460 dev_err(&udev->dev, in usb_suspend_both()
1461 "Failed to suspend device, error %d\n", in usb_suspend_both()
1470 if (udev->actconfig) { in usb_suspend_both()
1473 intf = udev->actconfig->interface[i]; in usb_suspend_both()
1482 udev->can_submit = 0; in usb_suspend_both()
1484 usb_hcd_flush_endpoint(udev, udev->ep_out[i]); in usb_suspend_both()
1485 usb_hcd_flush_endpoint(udev, udev->ep_in[i]); in usb_suspend_both()
1490 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_suspend_both()
1495 * usb_resume_both - resume a USB device and its interfaces
1503 * Autoresume requests originating from a child device or an interface
1504 * driver may be made without the protection of @udev's device lock, but
1520 if (udev->state == USB_STATE_NOTATTACHED) { in usb_resume_both()
1521 status = -ENODEV; in usb_resume_both()
1524 udev->can_submit = 1; in usb_resume_both()
1526 /* Resume the device */ in usb_resume_both()
1527 if (udev->state == USB_STATE_SUSPENDED || udev->reset_resume) in usb_resume_both()
1531 if (status == 0 && udev->actconfig) { in usb_resume_both()
1532 for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) { in usb_resume_both()
1533 intf = udev->actconfig->interface[i]; in usb_resume_both()
1535 udev->reset_resume); in usb_resume_both()
1541 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_resume_both()
1543 udev->reset_resume = 0; in usb_resume_both()
1563 w = device_may_wakeup(&udev->dev); in choose_wakeup()
1567 * If the device is autosuspended with the wrong wakeup setting, in choose_wakeup()
1570 if (udev->state == USB_STATE_SUSPENDED && w != udev->do_remote_wakeup) in choose_wakeup()
1571 pm_runtime_resume(&udev->dev); in choose_wakeup()
1572 udev->do_remote_wakeup = w; in choose_wakeup()
1575 /* The device lock is held by the PM core */
1576 int usb_suspend(struct device *dev, pm_message_t msg) in usb_suspend()
1592 if (udev->quirks & USB_QUIRK_DISCONNECT_SUSPEND) in usb_suspend()
1598 /* The device lock is held by the PM core */
1599 int usb_resume_complete(struct device *dev) in usb_resume_complete()
1606 if (udev->state != USB_STATE_NOTATTACHED) in usb_resume_complete()
1611 /* The device lock is held by the PM core */
1612 int usb_resume(struct device *dev, pm_message_t msg) in usb_resume()
1617 /* For all calls, take the device back to full power and in usb_resume()
1635 if (status == -ENODEV || status == -ESHUTDOWN) in usb_resume()
1641 * usb_enable_autosuspend - allow a USB device to be autosuspended
1642 * @udev: the USB device which may be autosuspended
1648 * The caller must hold @udev's device lock.
1652 pm_runtime_allow(&udev->dev); in usb_enable_autosuspend()
1657 * usb_disable_autosuspend - prevent a USB device from being autosuspended
1658 * @udev: the USB device which may not be autosuspended
1663 * The caller must hold @udev's device lock.
1667 pm_runtime_forbid(&udev->dev); in usb_disable_autosuspend()
1672 * usb_autosuspend_device - delayed autosuspend of a USB device and its interfaces
1677 * @udev's device file in usbfs is closed or after a configuration change.
1683 * The caller must hold @udev's device lock.
1692 status = pm_runtime_put_sync_autosuspend(&udev->dev); in usb_autosuspend_device()
1693 dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n", in usb_autosuspend_device()
1694 __func__, atomic_read(&udev->dev.power.usage_count), in usb_autosuspend_device()
1699 * usb_autoresume_device - immediately autoresume a USB device and its interfaces
1706 * be when @udev's device file in usbfs is opened or when a remote-wakeup
1710 * However if the autoresume fails then the usage counter is re-decremented.
1712 * The caller must hold @udev's device lock.
1722 status = pm_runtime_resume_and_get(&udev->dev); in usb_autoresume_device()
1723 dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n", in usb_autoresume_device()
1724 __func__, atomic_read(&udev->dev.power.usage_count), in usb_autoresume_device()
1732 * usb_autopm_put_interface - decrement a USB interface's PM-usage counter
1737 * example would be a character-device driver when its device file is
1741 * 0, a delayed autosuspend request for @intf's device is attempted. The
1752 status = pm_runtime_put_sync(&intf->dev); in usb_autopm_put_interface()
1753 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_put_interface()
1754 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_put_interface()
1760 * usb_autopm_put_interface_async - decrement a USB interface's PM-usage counter
1780 status = pm_runtime_put(&intf->dev); in usb_autopm_put_interface_async()
1781 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_put_interface_async()
1782 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_put_interface_async()
1788 * usb_autopm_put_interface_no_suspend - decrement a USB interface's PM-usage counter
1801 pm_runtime_put_noidle(&intf->dev); in usb_autopm_put_interface_no_suspend()
1806 * usb_autopm_get_interface - increment a USB interface's PM-usage counter
1814 * or @intf is unbound. A typical example would be a character-device
1815 * driver when its device file is opened.
1818 * However if the autoresume fails then the counter is re-decremented.
1828 status = pm_runtime_resume_and_get(&intf->dev); in usb_autopm_get_interface()
1829 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_get_interface()
1830 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_get_interface()
1839 * usb_autopm_get_interface_async - increment a USB interface's PM-usage counter
1844 * queues an autoresume request if the device is suspended. The
1847 * themselves), and it does not autoresume the device directly (it only
1848 * queues a request). After a successful call, the device may not yet be
1859 status = pm_runtime_get(&intf->dev); in usb_autopm_get_interface_async()
1860 if (status < 0 && status != -EINPROGRESS) in usb_autopm_get_interface_async()
1861 pm_runtime_put_noidle(&intf->dev); in usb_autopm_get_interface_async()
1862 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_get_interface_async()
1863 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_get_interface_async()
1865 if (status > 0 || status == -EINPROGRESS) in usb_autopm_get_interface_async()
1872 * usb_autopm_get_interface_no_resume - increment a USB interface's PM-usage counter
1885 pm_runtime_get_noresume(&intf->dev); in usb_autopm_get_interface_no_resume()
1889 /* Internal routine to check whether we may autosuspend a device. */
1895 if (udev->state == USB_STATE_NOTATTACHED) in autosuspend_check()
1896 return -ENODEV; in autosuspend_check()
1902 if (udev->actconfig) { in autosuspend_check()
1903 for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) { in autosuspend_check()
1904 intf = udev->actconfig->interface[i]; in autosuspend_check()
1911 if (intf->dev.power.disable_depth) in autosuspend_check()
1913 if (atomic_read(&intf->dev.power.usage_count) > 0) in autosuspend_check()
1914 return -EBUSY; in autosuspend_check()
1915 w |= intf->needs_remote_wakeup; in autosuspend_check()
1917 /* Don't allow autosuspend if the device will need in autosuspend_check()
1918 * a reset-resume and any of its interface drivers in autosuspend_check()
1921 if (udev->quirks & USB_QUIRK_RESET_RESUME) { in autosuspend_check()
1924 driver = to_usb_driver(intf->dev.driver); in autosuspend_check()
1925 if (!driver->reset_resume || in autosuspend_check()
1926 intf->needs_remote_wakeup) in autosuspend_check()
1927 return -EOPNOTSUPP; in autosuspend_check()
1931 if (w && !device_can_wakeup(&udev->dev)) { in autosuspend_check()
1932 dev_dbg(&udev->dev, "remote wakeup needed for autosuspend\n"); in autosuspend_check()
1933 return -EOPNOTSUPP; in autosuspend_check()
1937 * If the device is a direct child of the root hub and the HCD in autosuspend_check()
1941 if (w && udev->parent == udev->bus->root_hub && in autosuspend_check()
1942 bus_to_hcd(udev->bus)->cant_recv_wakeups) { in autosuspend_check()
1943 dev_dbg(&udev->dev, "HCD doesn't handle wakeup requests\n"); in autosuspend_check()
1944 return -EOPNOTSUPP; in autosuspend_check()
1947 udev->do_remote_wakeup = w; in autosuspend_check()
1951 int usb_runtime_suspend(struct device *dev) in usb_runtime_suspend()
1956 /* A USB device can be suspended if it passes the various autosuspend in usb_runtime_suspend()
1957 * checks. Runtime suspend for a USB device means suspending all the in usb_runtime_suspend()
1958 * interfaces and then the device itself. in usb_runtime_suspend()
1961 return -EAGAIN; in usb_runtime_suspend()
1966 if (status == -EAGAIN || status == -EBUSY) in usb_runtime_suspend()
1971 * -EAGAIN, or -EBUSY, so always return -EBUSY on an error in usb_runtime_suspend()
1975 if (status != 0 && udev->parent) in usb_runtime_suspend()
1976 return -EBUSY; in usb_runtime_suspend()
1980 int usb_runtime_resume(struct device *dev) in usb_runtime_resume()
1985 /* Runtime resume for a USB device means resuming both the device in usb_runtime_resume()
1992 int usb_runtime_idle(struct device *dev) in usb_runtime_idle()
1996 /* An idle USB device can be suspended if it passes the various in usb_runtime_idle()
2002 return -EBUSY; in usb_runtime_idle()
2007 struct usb_hcd *hcd = bus_to_hcd(udev->bus); in usb_set_usb2_hardware_lpm()
2008 int ret = -EPERM; in usb_set_usb2_hardware_lpm()
2010 if (hcd->driver->set_usb2_hw_lpm) { in usb_set_usb2_hardware_lpm()
2011 ret = hcd->driver->set_usb2_hw_lpm(hcd, udev, enable); in usb_set_usb2_hardware_lpm()
2013 udev->usb2_hw_lpm_enabled = enable; in usb_set_usb2_hardware_lpm()
2021 if (!udev->usb2_hw_lpm_capable || in usb_enable_usb2_hardware_lpm()
2022 !udev->usb2_hw_lpm_allowed || in usb_enable_usb2_hardware_lpm()
2023 udev->usb2_hw_lpm_enabled) in usb_enable_usb2_hardware_lpm()
2031 if (!udev->usb2_hw_lpm_enabled) in usb_disable_usb2_hardware_lpm()