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 <gregkh@suse.de>
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()
98 spin_lock(&dynids->lock); in usb_store_new_id()
99 list_add_tail(&dynid->node, &dynids->list); in usb_store_new_id()
100 spin_unlock(&dynids->lock); in usb_store_new_id()
119 list_for_each_entry(dynid, &dynids->list, node) in usb_show_dynids()
120 if (dynid->id.bInterfaceClass != 0) in usb_show_dynids()
121 count += scnprintf(&buf[count], PAGE_SIZE - count, "%04x %04x %02x\n", in usb_show_dynids()
122 dynid->id.idVendor, dynid->id.idProduct, in usb_show_dynids()
123 dynid->id.bInterfaceClass); in usb_show_dynids()
125 count += scnprintf(&buf[count], PAGE_SIZE - count, "%04x %04x\n", in usb_show_dynids()
126 dynid->id.idVendor, dynid->id.idProduct); in usb_show_dynids()
135 return usb_show_dynids(&usb_drv->dynids, buf); in new_id_show()
143 return usb_store_new_id(&usb_drv->dynids, usb_drv->id_table, driver, buf, count); in new_id_store()
148 * Remove a USB device ID from this driver
161 return -EINVAL; in remove_id_store()
163 spin_lock(&usb_driver->dynids.lock); in remove_id_store()
164 list_for_each_entry_safe(dynid, n, &usb_driver->dynids.list, node) { in remove_id_store()
165 struct usb_device_id *id = &dynid->id; in remove_id_store() local
167 if ((id->idVendor == idVendor) && in remove_id_store()
168 (id->idProduct == idProduct)) { in remove_id_store()
169 list_del(&dynid->node); in remove_id_store()
174 spin_unlock(&usb_driver->dynids.lock); 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()
223 spin_lock(&usb_drv->dynids.lock); in usb_free_dynids()
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()
228 spin_unlock(&usb_drv->dynids.lock); in usb_free_dynids()
236 spin_lock(&drv->dynids.lock); in usb_match_dynamic_id()
237 list_for_each_entry(dynid, &drv->dynids.list, node) { in usb_match_dynamic_id()
238 if (usb_match_one_id(intf, &dynid->id)) { in usb_match_dynamic_id()
239 spin_unlock(&drv->dynids.lock); in usb_match_dynamic_id()
240 return &dynid->id; in usb_match_dynamic_id()
243 spin_unlock(&drv->dynids.lock); in usb_match_dynamic_id()
249 static int usb_probe_device(struct device *dev) in usb_probe_device()
251 struct usb_device_driver *udriver = to_usb_device_driver(dev->driver); in usb_probe_device()
259 /* The device should always appear to be in use in usb_probe_device()
262 if (!udriver->supports_autosuspend) in usb_probe_device()
267 if (udriver->generic_subclass) in usb_probe_device()
272 /* Probe the USB device with the driver in hand, but only in usb_probe_device()
274 * device driver has an id_table or a match function; i.e., in usb_probe_device()
275 * when the device driver was explicitly matched against in usb_probe_device()
276 * a device. in usb_probe_device()
278 * If the device driver does not have either of these, in usb_probe_device()
279 * then we assume that it can bind to any device and is in usb_probe_device()
280 * not truly a more specialized/non-generic driver, so a in usb_probe_device()
281 * return value of -ENODEV should not force the device in usb_probe_device()
283 * can still be another, more specialized, device driver. in usb_probe_device()
288 * specialized USB device drivers for a particular device? in usb_probe_device()
290 * specialised device drivers prior to setting the in usb_probe_device()
293 if (udriver->probe) in usb_probe_device()
294 error = udriver->probe(udev); in usb_probe_device()
295 else if (!udriver->generic_subclass) in usb_probe_device()
296 error = -EINVAL; in usb_probe_device()
297 if (error == -ENODEV && udriver != &usb_generic_driver && in usb_probe_device()
298 (udriver->id_table || udriver->match)) { in usb_probe_device()
299 udev->use_generic_driver = 1; in usb_probe_device()
300 return -EPROBE_DEFER; in usb_probe_device()
306 static int usb_unbind_device(struct device *dev) in usb_unbind_device()
309 struct usb_device_driver *udriver = to_usb_device_driver(dev->driver); in usb_unbind_device()
311 if (udriver->disconnect) in usb_unbind_device()
312 udriver->disconnect(udev); in usb_unbind_device()
313 if (udriver->generic_subclass) in usb_unbind_device()
315 if (!udriver->supports_autosuspend) in usb_unbind_device()
321 static int usb_probe_interface(struct device *dev) in usb_probe_interface()
323 struct usb_driver *driver = to_usb_driver(dev->driver); in usb_probe_interface()
326 const struct usb_device_id *id; in usb_probe_interface() local
327 int error = -ENODEV; in usb_probe_interface()
328 int lpm_disable_error = -ENODEV; in usb_probe_interface()
332 intf->needs_binding = 0; in usb_probe_interface()
337 if (udev->authorized == 0) { in usb_probe_interface()
338 dev_err(&intf->dev, "Device is not authorized for usage\n"); in usb_probe_interface()
340 } else if (intf->authorized == 0) { in usb_probe_interface()
341 dev_err(&intf->dev, "Interface %d is not authorized for usage\n", in usb_probe_interface()
342 intf->altsetting->desc.bInterfaceNumber); in usb_probe_interface()
346 id = usb_match_dynamic_id(intf, driver); in usb_probe_interface()
347 if (!id) in usb_probe_interface()
348 id = usb_match_id(intf, driver->id_table); in usb_probe_interface()
349 if (!id) in usb_probe_interface()
352 dev_dbg(dev, "%s - got id\n", __func__); in usb_probe_interface()
358 intf->condition = USB_INTERFACE_BINDING; in usb_probe_interface()
361 * runtime-PM-enabled only if the driver has autosuspend support. in usb_probe_interface()
366 if (driver->supports_autosuspend) in usb_probe_interface()
369 /* If the new driver doesn't allow hub-initiated LPM, and we can't in usb_probe_interface()
370 * disable hub-initiated LPM, then fail the probe. in usb_probe_interface()
380 if (driver->disable_hub_initiated_lpm) { in usb_probe_interface()
383 dev_err(&intf->dev, "%s Failed to disable LPM for driver %s\n", in usb_probe_interface()
384 __func__, driver->name); in usb_probe_interface()
391 if (intf->needs_altsetting0) { in usb_probe_interface()
392 error = usb_set_interface(udev, intf->altsetting[0]. in usb_probe_interface()
396 intf->needs_altsetting0 = 0; in usb_probe_interface()
399 error = driver->probe(intf, id); in usb_probe_interface()
403 intf->condition = USB_INTERFACE_BOUND; in usb_probe_interface()
414 intf->needs_remote_wakeup = 0; in usb_probe_interface()
415 intf->condition = USB_INTERFACE_UNBOUND; in usb_probe_interface()
421 /* Unbound interfaces are always runtime-PM-disabled and -suspended */ in usb_probe_interface()
422 if (driver->supports_autosuspend) in usb_probe_interface()
431 static int usb_unbind_interface(struct device *dev) in usb_unbind_interface()
433 struct usb_driver *driver = to_usb_driver(dev->driver); in usb_unbind_interface()
438 int lpm_disable_error = -ENODEV; in usb_unbind_interface()
440 intf->condition = USB_INTERFACE_UNBINDING; in usb_unbind_interface()
446 /* If hub-initiated LPM policy may change, attempt to disable LPM until in usb_unbind_interface()
449 * hub-initiated LPM. in usb_unbind_interface()
451 if (driver->disable_hub_initiated_lpm) in usb_unbind_interface()
456 * supports "soft" unbinding and the device is still present. in usb_unbind_interface()
458 if (!driver->soft_unbind || udev->state == USB_STATE_NOTATTACHED) in usb_unbind_interface()
461 driver->disconnect(intf); in usb_unbind_interface()
464 for (i = 0, j = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) { in usb_unbind_interface()
465 ep = &intf->cur_altsetting->endpoint[i]; in usb_unbind_interface()
466 if (ep->streams == 0) in usb_unbind_interface()
482 * We cannot do a Set-Interface if the device is suspended or in usb_unbind_interface()
484 * altsetting means creating new endpoint device entries). in usb_unbind_interface()
485 * When either of these happens, defer the Set-Interface. in usb_unbind_interface()
487 if (intf->cur_altsetting->desc.bAlternateSetting == 0) { in usb_unbind_interface()
488 /* Already in altsetting 0 so skip Set-Interface. in usb_unbind_interface()
489 * Just re-enable it without affecting the endpoint toggles. in usb_unbind_interface()
492 } else if (!error && !intf->dev.power.is_prepared) { in usb_unbind_interface()
493 r = usb_set_interface(udev, intf->altsetting[0]. in usb_unbind_interface()
496 intf->needs_altsetting0 = 1; in usb_unbind_interface()
498 intf->needs_altsetting0 = 1; in usb_unbind_interface()
502 intf->condition = USB_INTERFACE_UNBOUND; in usb_unbind_interface()
503 intf->needs_remote_wakeup = 0; in usb_unbind_interface()
505 /* Attempt to re-enable USB3 LPM, if the disable succeeded. */ in usb_unbind_interface()
509 /* Unbound interfaces are always runtime-PM-disabled and -suspended */ in usb_unbind_interface()
510 if (driver->supports_autosuspend) in usb_unbind_interface()
521 * usb_driver_claim_interface - bind a driver to an interface
524 * usb device's active configuration
527 * This is used by usb device drivers that need to claim more than one
528 * interface on a device when probing (audio and acm are current examples).
529 * No device driver should directly modify internal usb_interface or
532 * Callers must own the device lock, so driver probe() entries don't need
541 struct device *dev; in usb_driver_claim_interface()
545 return -ENODEV; in usb_driver_claim_interface()
547 dev = &iface->dev; in usb_driver_claim_interface()
548 if (dev->driver) in usb_driver_claim_interface()
549 return -EBUSY; in usb_driver_claim_interface()
552 if (!iface->authorized) in usb_driver_claim_interface()
553 return -ENODEV; in usb_driver_claim_interface()
555 dev->driver = &driver->driver; in usb_driver_claim_interface()
557 iface->needs_binding = 0; in usb_driver_claim_interface()
559 iface->condition = USB_INTERFACE_BOUND; in usb_driver_claim_interface()
562 * runtime-PM-enabled, but only if the driver has autosuspend in usb_driver_claim_interface()
564 * device from being autosuspended, but left disabled. In either in usb_driver_claim_interface()
568 if (driver->supports_autosuspend) in usb_driver_claim_interface()
580 dev->driver = NULL; in usb_driver_claim_interface()
582 iface->needs_remote_wakeup = 0; in usb_driver_claim_interface()
583 iface->condition = USB_INTERFACE_UNBOUND; in usb_driver_claim_interface()
586 * Unbound interfaces are always runtime-PM-disabled in usb_driver_claim_interface()
587 * and runtime-PM-suspended in usb_driver_claim_interface()
589 if (driver->supports_autosuspend) in usb_driver_claim_interface()
599 * usb_driver_release_interface - unbind a driver from an interface
608 * Callers must own the device lock, so driver disconnect() entries don't
615 struct device *dev = &iface->dev; in usb_driver_release_interface()
618 if (!dev->driver || dev->driver != &driver->driver) in usb_driver_release_interface()
622 if (iface->condition != USB_INTERFACE_BOUND) in usb_driver_release_interface()
624 iface->condition = USB_INTERFACE_UNBINDING; in usb_driver_release_interface()
634 dev->driver = NULL; in usb_driver_release_interface()
641 int usb_match_device(struct usb_device *dev, const struct usb_device_id *id) in usb_match_device() argument
643 if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && in usb_match_device()
644 id->idVendor != le16_to_cpu(dev->descriptor.idVendor)) in usb_match_device()
647 if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) && in usb_match_device()
648 id->idProduct != le16_to_cpu(dev->descriptor.idProduct)) in usb_match_device()
651 /* No need to test id->bcdDevice_lo != 0, since 0 is never in usb_match_device()
653 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) && in usb_match_device()
654 (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice))) in usb_match_device()
657 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) && in usb_match_device()
658 (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice))) in usb_match_device()
661 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) && in usb_match_device()
662 (id->bDeviceClass != dev->descriptor.bDeviceClass)) in usb_match_device()
665 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) && in usb_match_device()
666 (id->bDeviceSubClass != dev->descriptor.bDeviceSubClass)) in usb_match_device()
669 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) && in usb_match_device()
670 (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol)) in usb_match_device()
679 const struct usb_device_id *id) in usb_match_one_id_intf() argument
682 * checked for a match if the device class is Vendor Specific, in usb_match_one_id_intf()
683 * unless the match record specifies the Vendor ID. */ in usb_match_one_id_intf()
684 if (dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC && in usb_match_one_id_intf()
685 !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && in usb_match_one_id_intf()
686 (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS | in usb_match_one_id_intf()
692 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) && in usb_match_one_id_intf()
693 (id->bInterfaceClass != intf->desc.bInterfaceClass)) in usb_match_one_id_intf()
696 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) && in usb_match_one_id_intf()
697 (id->bInterfaceSubClass != intf->desc.bInterfaceSubClass)) in usb_match_one_id_intf()
700 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) && in usb_match_one_id_intf()
701 (id->bInterfaceProtocol != intf->desc.bInterfaceProtocol)) in usb_match_one_id_intf()
704 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) && in usb_match_one_id_intf()
705 (id->bInterfaceNumber != intf->desc.bInterfaceNumber)) in usb_match_one_id_intf()
713 const struct usb_device_id *id) in usb_match_one_id() argument
718 /* proc_connectinfo in devio.c may call us with id == NULL. */ in usb_match_one_id()
719 if (id == NULL) in usb_match_one_id()
722 intf = interface->cur_altsetting; in usb_match_one_id()
725 if (!usb_match_device(dev, id)) in usb_match_one_id()
728 return usb_match_one_id_intf(dev, intf, id); in usb_match_one_id()
733 * usb_match_id - find first usb_device_id matching device or interface
735 * @id: array of usb_device_id structures, terminated by zero entry
738 * the first one matching the device or interface, or null.
740 * Most USB device drivers will use this indirectly, through the usb core,
742 * These device tables are exported with MODULE_DEVICE_TABLE, through
752 * in the device or interface descriptor, or else the device_id
755 * "driver_info" is normally used only by device drivers,
757 * as a driver's "modules.usbmap" entry if you provide an id with
758 * only a nonzero "driver_info" field. If you do this, the USB device
765 * driver selection must come from smart driver id records.
771 * The most specific match specifiers use device descriptor
772 * data. These are commonly used with product-specific matches;
778 * Matches based on device class/subclass/protocol specifications
780 * its siblings. These are used with single-function devices
786 * multiple-function device. Use the USB_INTERFACE_INFO
787 * macro, or its siblings, to match class-per-interface style
791 * any interface if the device class is set to Vendor-Specific.
794 * vendor-specific, and hence matching against a standard product
796 * interface-based match for such a device, create a match record
797 * that also specifies the vendor ID. (Unforunately there isn't a
806 const struct usb_device_id *id) in usb_match_id() argument
808 /* proc_connectinfo in devio.c may call us with id == NULL. */ in usb_match_id()
809 if (id == NULL) in usb_match_id()
812 /* It is important to check that id->driver_info is nonzero, in usb_match_id()
814 id->driver_info is the way to create an entry that in usb_match_id()
816 device and interface. */ in usb_match_id()
817 for (; id->idVendor || id->idProduct || id->bDeviceClass || in usb_match_id()
818 id->bInterfaceClass || id->driver_info; id++) { in usb_match_id()
819 if (usb_match_one_id(interface, id)) in usb_match_id()
820 return id; in usb_match_id()
828 const struct usb_device_id *id) in usb_device_match_id() argument
830 if (!id) in usb_device_match_id()
833 for (; id->idVendor || id->idProduct ; id++) { in usb_device_match_id()
834 if (usb_match_device(udev, id)) in usb_device_match_id()
835 return id; in usb_device_match_id()
845 if (udrv->id_table && udrv->match) in usb_driver_applicable()
846 return usb_device_match_id(udev, udrv->id_table) != NULL && in usb_driver_applicable()
847 udrv->match(udev); in usb_driver_applicable()
849 if (udrv->id_table) in usb_driver_applicable()
850 return usb_device_match_id(udev, udrv->id_table) != NULL; in usb_driver_applicable()
852 if (udrv->match) in usb_driver_applicable()
853 return udrv->match(udev); in usb_driver_applicable()
858 static int usb_device_match(struct device *dev, struct device_driver *drv) in usb_device_match()
872 /* If the device driver under consideration does not have a in usb_device_match()
876 if (!udrv->id_table && !udrv->match) in usb_device_match()
884 const struct usb_device_id *id; in usb_device_match() local
886 /* device drivers never match interfaces */ in usb_device_match()
893 id = usb_match_id(intf, usb_drv->id_table); in usb_device_match()
894 if (id) in usb_device_match()
897 id = usb_match_dynamic_id(intf, usb_drv); in usb_device_match()
898 if (id) in usb_device_match()
905 static int usb_uevent(const struct device *dev, struct kobj_uevent_env *env) in usb_uevent()
919 if (usb_dev->devnum < 0) { in usb_uevent()
922 return -ENODEV; in usb_uevent()
924 if (!usb_dev->bus) { in usb_uevent()
926 return -ENODEV; in usb_uevent()
929 /* per-device configurations are common */ in usb_uevent()
931 le16_to_cpu(usb_dev->descriptor.idVendor), in usb_uevent()
932 le16_to_cpu(usb_dev->descriptor.idProduct), in usb_uevent()
933 le16_to_cpu(usb_dev->descriptor.bcdDevice))) in usb_uevent()
934 return -ENOMEM; in usb_uevent()
936 /* class-based driver binding models */ in usb_uevent()
938 usb_dev->descriptor.bDeviceClass, in usb_uevent()
939 usb_dev->descriptor.bDeviceSubClass, in usb_uevent()
940 usb_dev->descriptor.bDeviceProtocol)) in usb_uevent()
941 return -ENOMEM; in usb_uevent()
946 static int __usb_bus_reprobe_drivers(struct device *dev, void *data) in __usb_bus_reprobe_drivers()
953 if (dev->driver != &usb_generic_driver.driver) in __usb_bus_reprobe_drivers()
961 if (ret && ret != -EPROBE_DEFER) in __usb_bus_reprobe_drivers()
962 dev_err(dev, "Failed to reprobe device (error %d)\n", ret); in __usb_bus_reprobe_drivers()
969 return drv->probe == usb_probe_device; in is_usb_device_driver()
973 * usb_register_device_driver - register a USB device (not interface) driver
974 * @new_udriver: USB operations for the device driver
977 * Registers a USB device driver with the USB core. The list of
989 return -ENODEV; in usb_register_device_driver()
991 new_udriver->driver.name = new_udriver->name; in usb_register_device_driver()
992 new_udriver->driver.bus = &usb_bus_type; in usb_register_device_driver()
993 new_udriver->driver.probe = usb_probe_device; in usb_register_device_driver()
994 new_udriver->driver.remove = usb_unbind_device; in usb_register_device_driver()
995 new_udriver->driver.owner = owner; in usb_register_device_driver()
996 new_udriver->driver.dev_groups = new_udriver->dev_groups; in usb_register_device_driver()
998 retval = driver_register(&new_udriver->driver); in usb_register_device_driver()
1001 pr_info("%s: registered new device driver %s\n", in usb_register_device_driver()
1002 usbcore_name, new_udriver->name); in usb_register_device_driver()
1004 * Check whether any device could be better served with in usb_register_device_driver()
1010 pr_err("%s: error %d registering device driver %s\n", in usb_register_device_driver()
1011 usbcore_name, retval, new_udriver->name); in usb_register_device_driver()
1019 * usb_deregister_device_driver - unregister a USB device (not interface) driver
1020 * @udriver: USB operations of the device driver to unregister
1027 pr_info("%s: deregistering device driver %s\n", in usb_deregister_device_driver()
1028 usbcore_name, udriver->name); in usb_deregister_device_driver()
1030 driver_unregister(&udriver->driver); in usb_deregister_device_driver()
1035 * usb_register_driver - register a USB interface driver
1056 return -ENODEV; in usb_register_driver()
1058 new_driver->driver.name = new_driver->name; in usb_register_driver()
1059 new_driver->driver.bus = &usb_bus_type; in usb_register_driver()
1060 new_driver->driver.probe = usb_probe_interface; in usb_register_driver()
1061 new_driver->driver.remove = usb_unbind_interface; in usb_register_driver()
1062 new_driver->driver.owner = owner; in usb_register_driver()
1063 new_driver->driver.mod_name = mod_name; in usb_register_driver()
1064 new_driver->driver.dev_groups = new_driver->dev_groups; in usb_register_driver()
1065 spin_lock_init(&new_driver->dynids.lock); in usb_register_driver()
1066 INIT_LIST_HEAD(&new_driver->dynids.list); in usb_register_driver()
1068 retval = driver_register(&new_driver->driver); in usb_register_driver()
1077 usbcore_name, new_driver->name); in usb_register_driver()
1083 driver_unregister(&new_driver->driver); in usb_register_driver()
1086 usbcore_name, retval, new_driver->name); in usb_register_driver()
1092 * usb_deregister - unregister a USB interface driver
1105 usbcore_name, driver->name); in usb_deregister()
1108 driver_unregister(&driver->driver); in usb_deregister()
1117 * The caller must hold @intf's device's lock, but not @intf's lock.
1121 struct usb_driver *driver = to_usb_driver(intf->dev.driver); in usb_forced_unbind_intf()
1123 dev_dbg(&intf->dev, "forced unbind\n"); in usb_forced_unbind_intf()
1127 intf->needs_binding = 1; in usb_forced_unbind_intf()
1134 * The caller must hold @udev's device lock.
1142 config = udev->actconfig; in unbind_marked_interfaces()
1144 for (i = 0; i < config->desc.bNumInterfaces; ++i) { in unbind_marked_interfaces()
1145 intf = config->interface[i]; in unbind_marked_interfaces()
1146 if (intf->dev.driver && intf->needs_binding) in unbind_marked_interfaces()
1155 * The caller must hold @intf's device's lock, but not @intf's lock.
1165 if (intf->dev.driver) in usb_rebind_intf()
1169 if (!intf->dev.power.is_prepared) { in usb_rebind_intf()
1170 intf->needs_binding = 0; in usb_rebind_intf()
1171 rc = device_attach(&intf->dev); in usb_rebind_intf()
1172 if (rc < 0 && rc != -EPROBE_DEFER) in usb_rebind_intf()
1173 dev_warn(&intf->dev, "rebind failed: %d\n", rc); in usb_rebind_intf()
1181 * The caller must hold @udev's device lock.
1189 config = udev->actconfig; in rebind_marked_interfaces()
1191 for (i = 0; i < config->desc.bNumInterfaces; ++i) { in rebind_marked_interfaces()
1192 intf = config->interface[i]; in rebind_marked_interfaces()
1193 if (intf->needs_binding) in rebind_marked_interfaces()
1204 * The caller must hold @udev's device lock.
1218 * The caller must hold @udev's device lock.
1227 config = udev->actconfig; in unbind_no_pm_drivers_interfaces()
1229 for (i = 0; i < config->desc.bNumInterfaces; ++i) { in unbind_no_pm_drivers_interfaces()
1230 intf = config->interface[i]; in unbind_no_pm_drivers_interfaces()
1232 if (intf->dev.driver) { in unbind_no_pm_drivers_interfaces()
1233 drv = to_usb_driver(intf->dev.driver); in unbind_no_pm_drivers_interfaces()
1234 if (!drv->suspend || !drv->resume) in unbind_no_pm_drivers_interfaces()
1246 if (udev->state == USB_STATE_NOTATTACHED || in usb_suspend_device()
1247 udev->state == USB_STATE_SUSPENDED) in usb_suspend_device()
1251 if (udev->dev.driver) in usb_suspend_device()
1252 udriver = to_usb_device_driver(udev->dev.driver); in usb_suspend_device()
1254 udev->do_remote_wakeup = 0; in usb_suspend_device()
1257 if (udriver->suspend) in usb_suspend_device()
1258 status = udriver->suspend(udev, msg); in usb_suspend_device()
1259 if (status == 0 && udriver->generic_subclass) in usb_suspend_device()
1263 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_suspend_device()
1272 if (udev->state == USB_STATE_NOTATTACHED) in usb_resume_device()
1276 if (udev->dev.driver == NULL) { in usb_resume_device()
1277 status = -ENOTCONN; in usb_resume_device()
1281 /* Non-root devices on a full/low-speed bus must wait for their in usb_resume_device()
1282 * companion high-speed root hub, in case a handoff is needed. in usb_resume_device()
1284 if (!PMSG_IS_AUTO(msg) && udev->parent && udev->bus->hs_companion) in usb_resume_device()
1285 device_pm_wait_for_dev(&udev->dev, in usb_resume_device()
1286 &udev->bus->hs_companion->root_hub->dev); in usb_resume_device()
1288 if (udev->quirks & USB_QUIRK_RESET_RESUME) in usb_resume_device()
1289 udev->reset_resume = 1; in usb_resume_device()
1291 udriver = to_usb_device_driver(udev->dev.driver); in usb_resume_device()
1292 if (udriver->generic_subclass) in usb_resume_device()
1294 if (status == 0 && udriver->resume) in usb_resume_device()
1295 status = udriver->resume(udev, msg); in usb_resume_device()
1298 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_resume_device()
1308 if (udev->state == USB_STATE_NOTATTACHED || in usb_suspend_interface()
1309 intf->condition == USB_INTERFACE_UNBOUND) in usb_suspend_interface()
1311 driver = to_usb_driver(intf->dev.driver); in usb_suspend_interface()
1314 status = driver->suspend(intf, msg); in usb_suspend_interface()
1316 dev_err(&intf->dev, "suspend error %d\n", status); in usb_suspend_interface()
1319 dev_vdbg(&intf->dev, "%s: status %d\n", __func__, status); in usb_suspend_interface()
1329 if (udev->state == USB_STATE_NOTATTACHED) in usb_resume_interface()
1333 if (intf->condition == USB_INTERFACE_UNBINDING) in usb_resume_interface()
1337 if (intf->condition == USB_INTERFACE_UNBOUND) { in usb_resume_interface()
1340 if (intf->needs_altsetting0 && !intf->dev.power.is_prepared) { in usb_resume_interface()
1341 usb_set_interface(udev, intf->altsetting[0]. in usb_resume_interface()
1343 intf->needs_altsetting0 = 0; in usb_resume_interface()
1349 if (intf->needs_binding) in usb_resume_interface()
1351 driver = to_usb_driver(intf->dev.driver); in usb_resume_interface()
1354 if (driver->reset_resume) { in usb_resume_interface()
1355 status = driver->reset_resume(intf); in usb_resume_interface()
1357 dev_err(&intf->dev, "%s error %d\n", in usb_resume_interface()
1360 intf->needs_binding = 1; in usb_resume_interface()
1361 dev_dbg(&intf->dev, "no reset_resume for driver %s?\n", in usb_resume_interface()
1362 driver->name); in usb_resume_interface()
1365 status = driver->resume(intf); in usb_resume_interface()
1367 dev_err(&intf->dev, "resume error %d\n", status); in usb_resume_interface()
1371 dev_vdbg(&intf->dev, "%s: status %d\n", __func__, status); in usb_resume_interface()
1378 * usb_suspend_both - suspend a USB device and its interfaces
1387 * state as the device, but when called from system sleep, all error
1388 * from suspend methods of interfaces and the non-root-hub device itself
1390 * to the device's state when @udev is root-hub and its suspend method
1393 * Autosuspend requests originating from a child device or an interface
1394 * driver may be made without the protection of @udev's device lock, but
1410 if (udev->state == USB_STATE_NOTATTACHED || in usb_suspend_both()
1411 udev->state == USB_STATE_SUSPENDED) in usb_suspend_both()
1415 if (udev->actconfig) { in usb_suspend_both()
1416 n = udev->actconfig->desc.bNumInterfaces; in usb_suspend_both()
1417 for (i = n - 1; i >= 0; --i) { in usb_suspend_both()
1418 intf = udev->actconfig->interface[i]; in usb_suspend_both()
1432 * Ignore errors from non-root-hub devices during in usb_suspend_both()
1437 if (udev->parent && !PMSG_IS_AUTO(msg)) in usb_suspend_both()
1441 * If the device is inaccessible, don't try to resume in usb_suspend_both()
1444 if (status && status != -EBUSY) { in usb_suspend_both()
1451 dev_err(&udev->dev, in usb_suspend_both()
1452 "Failed to suspend device, error %d\n", in usb_suspend_both()
1461 if (udev->actconfig) { in usb_suspend_both()
1464 intf = udev->actconfig->interface[i]; in usb_suspend_both()
1473 udev->can_submit = 0; in usb_suspend_both()
1475 usb_hcd_flush_endpoint(udev, udev->ep_out[i]); in usb_suspend_both()
1476 usb_hcd_flush_endpoint(udev, udev->ep_in[i]); in usb_suspend_both()
1481 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_suspend_both()
1486 * usb_resume_both - resume a USB device and its interfaces
1494 * Autoresume requests originating from a child device or an interface
1495 * driver may be made without the protection of @udev's device lock, but
1511 if (udev->state == USB_STATE_NOTATTACHED) { in usb_resume_both()
1512 status = -ENODEV; in usb_resume_both()
1515 udev->can_submit = 1; in usb_resume_both()
1517 /* Resume the device */ in usb_resume_both()
1518 if (udev->state == USB_STATE_SUSPENDED || udev->reset_resume) in usb_resume_both()
1522 if (status == 0 && udev->actconfig) { in usb_resume_both()
1523 for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) { in usb_resume_both()
1524 intf = udev->actconfig->interface[i]; in usb_resume_both()
1526 udev->reset_resume); in usb_resume_both()
1532 dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status); in usb_resume_both()
1534 udev->reset_resume = 0; in usb_resume_both()
1554 w = device_may_wakeup(&udev->dev); in choose_wakeup()
1558 * If the device is autosuspended with the wrong wakeup setting, in choose_wakeup()
1561 if (udev->state == USB_STATE_SUSPENDED && w != udev->do_remote_wakeup) in choose_wakeup()
1562 pm_runtime_resume(&udev->dev); in choose_wakeup()
1563 udev->do_remote_wakeup = w; in choose_wakeup()
1566 /* The device lock is held by the PM core */
1567 int usb_suspend(struct device *dev, pm_message_t msg) in usb_suspend()
1583 if (udev->quirks & USB_QUIRK_DISCONNECT_SUSPEND) in usb_suspend()
1589 /* The device lock is held by the PM core */
1590 int usb_resume_complete(struct device *dev) in usb_resume_complete()
1597 if (udev->state != USB_STATE_NOTATTACHED) in usb_resume_complete()
1602 /* The device lock is held by the PM core */
1603 int usb_resume(struct device *dev, pm_message_t msg) in usb_resume()
1608 /* For all calls, take the device back to full power and in usb_resume()
1626 if (status == -ENODEV || status == -ESHUTDOWN) in usb_resume()
1632 * usb_enable_autosuspend - allow a USB device to be autosuspended
1633 * @udev: the USB device which may be autosuspended
1639 * The caller must hold @udev's device lock.
1643 pm_runtime_allow(&udev->dev); in usb_enable_autosuspend()
1648 * usb_disable_autosuspend - prevent a USB device from being autosuspended
1649 * @udev: the USB device which may not be autosuspended
1654 * The caller must hold @udev's device lock.
1658 pm_runtime_forbid(&udev->dev); in usb_disable_autosuspend()
1663 * usb_autosuspend_device - delayed autosuspend of a USB device and its interfaces
1668 * @udev's device file in usbfs is closed or after a configuration change.
1674 * The caller must hold @udev's device lock.
1683 status = pm_runtime_put_sync_autosuspend(&udev->dev); in usb_autosuspend_device()
1684 dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n", in usb_autosuspend_device()
1685 __func__, atomic_read(&udev->dev.power.usage_count), in usb_autosuspend_device()
1690 * usb_autoresume_device - immediately autoresume a USB device and its interfaces
1697 * be when @udev's device file in usbfs is opened or when a remote-wakeup
1701 * However if the autoresume fails then the usage counter is re-decremented.
1703 * The caller must hold @udev's device lock.
1713 status = pm_runtime_get_sync(&udev->dev); in usb_autoresume_device()
1715 pm_runtime_put_sync(&udev->dev); in usb_autoresume_device()
1716 dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n", in usb_autoresume_device()
1717 __func__, atomic_read(&udev->dev.power.usage_count), in usb_autoresume_device()
1725 * usb_autopm_put_interface - decrement a USB interface's PM-usage counter
1730 * example would be a character-device driver when its device file is
1734 * 0, a delayed autosuspend request for @intf's device is attempted. The
1745 status = pm_runtime_put_sync(&intf->dev); in usb_autopm_put_interface()
1746 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_put_interface()
1747 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_put_interface()
1753 * usb_autopm_put_interface_async - decrement a USB interface's PM-usage counter
1773 status = pm_runtime_put(&intf->dev); in usb_autopm_put_interface_async()
1774 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_put_interface_async()
1775 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_put_interface_async()
1781 * usb_autopm_put_interface_no_suspend - decrement a USB interface's PM-usage counter
1794 pm_runtime_put_noidle(&intf->dev); in usb_autopm_put_interface_no_suspend()
1799 * usb_autopm_get_interface - increment a USB interface's PM-usage counter
1807 * or @intf is unbound. A typical example would be a character-device
1808 * driver when its device file is opened.
1811 * However if the autoresume fails then the counter is re-decremented.
1821 status = pm_runtime_get_sync(&intf->dev); in usb_autopm_get_interface()
1823 pm_runtime_put_sync(&intf->dev); in usb_autopm_get_interface()
1824 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_get_interface()
1825 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_get_interface()
1834 * usb_autopm_get_interface_async - increment a USB interface's PM-usage counter
1839 * queues an autoresume request if the device is suspended. The
1842 * themselves), and it does not autoresume the device directly (it only
1843 * queues a request). After a successful call, the device may not yet be
1854 status = pm_runtime_get(&intf->dev); in usb_autopm_get_interface_async()
1855 if (status < 0 && status != -EINPROGRESS) in usb_autopm_get_interface_async()
1856 pm_runtime_put_noidle(&intf->dev); in usb_autopm_get_interface_async()
1857 dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n", in usb_autopm_get_interface_async()
1858 __func__, atomic_read(&intf->dev.power.usage_count), in usb_autopm_get_interface_async()
1860 if (status > 0 || status == -EINPROGRESS) in usb_autopm_get_interface_async()
1867 * usb_autopm_get_interface_no_resume - increment a USB interface's PM-usage counter
1880 pm_runtime_get_noresume(&intf->dev); in usb_autopm_get_interface_no_resume()
1884 /* Internal routine to check whether we may autosuspend a device. */
1890 if (udev->state == USB_STATE_NOTATTACHED) in autosuspend_check()
1891 return -ENODEV; in autosuspend_check()
1897 if (udev->actconfig) { in autosuspend_check()
1898 for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) { in autosuspend_check()
1899 intf = udev->actconfig->interface[i]; in autosuspend_check()
1906 if (intf->dev.power.disable_depth) in autosuspend_check()
1908 if (atomic_read(&intf->dev.power.usage_count) > 0) in autosuspend_check()
1909 return -EBUSY; in autosuspend_check()
1910 w |= intf->needs_remote_wakeup; in autosuspend_check()
1912 /* Don't allow autosuspend if the device will need in autosuspend_check()
1913 * a reset-resume and any of its interface drivers in autosuspend_check()
1916 if (udev->quirks & USB_QUIRK_RESET_RESUME) { in autosuspend_check()
1919 driver = to_usb_driver(intf->dev.driver); in autosuspend_check()
1920 if (!driver->reset_resume || in autosuspend_check()
1921 intf->needs_remote_wakeup) in autosuspend_check()
1922 return -EOPNOTSUPP; in autosuspend_check()
1926 if (w && !device_can_wakeup(&udev->dev)) { in autosuspend_check()
1927 dev_dbg(&udev->dev, "remote wakeup needed for autosuspend\n"); in autosuspend_check()
1928 return -EOPNOTSUPP; in autosuspend_check()
1932 * If the device is a direct child of the root hub and the HCD in autosuspend_check()
1936 if (w && udev->parent == udev->bus->root_hub && in autosuspend_check()
1937 bus_to_hcd(udev->bus)->cant_recv_wakeups) { in autosuspend_check()
1938 dev_dbg(&udev->dev, "HCD doesn't handle wakeup requests\n"); in autosuspend_check()
1939 return -EOPNOTSUPP; in autosuspend_check()
1942 udev->do_remote_wakeup = w; in autosuspend_check()
1946 int usb_runtime_suspend(struct device *dev) in usb_runtime_suspend()
1951 /* A USB device can be suspended if it passes the various autosuspend in usb_runtime_suspend()
1952 * checks. Runtime suspend for a USB device means suspending all the in usb_runtime_suspend()
1953 * interfaces and then the device itself. in usb_runtime_suspend()
1956 return -EAGAIN; in usb_runtime_suspend()
1961 if (status == -EAGAIN || status == -EBUSY) in usb_runtime_suspend()
1966 * -EAGAIN, or -EBUSY, so always return -EBUSY on an error in usb_runtime_suspend()
1970 if (status != 0 && udev->parent) in usb_runtime_suspend()
1971 return -EBUSY; in usb_runtime_suspend()
1975 int usb_runtime_resume(struct device *dev) in usb_runtime_resume()
1980 /* Runtime resume for a USB device means resuming both the device in usb_runtime_resume()
1987 int usb_runtime_idle(struct device *dev) in usb_runtime_idle()
1991 /* An idle USB device can be suspended if it passes the various in usb_runtime_idle()
1997 return -EBUSY; in usb_runtime_idle()
2002 struct usb_hcd *hcd = bus_to_hcd(udev->bus); in usb_set_usb2_hardware_lpm()
2003 int ret = -EPERM; in usb_set_usb2_hardware_lpm()
2005 if (hcd->driver->set_usb2_hw_lpm) { in usb_set_usb2_hardware_lpm()
2006 ret = hcd->driver->set_usb2_hw_lpm(hcd, udev, enable); in usb_set_usb2_hardware_lpm()
2008 udev->usb2_hw_lpm_enabled = enable; in usb_set_usb2_hardware_lpm()
2016 if (!udev->usb2_hw_lpm_capable || in usb_enable_usb2_hardware_lpm()
2017 !udev->usb2_hw_lpm_allowed || in usb_enable_usb2_hardware_lpm()
2018 udev->usb2_hw_lpm_enabled) in usb_enable_usb2_hardware_lpm()
2026 if (!udev->usb2_hw_lpm_enabled) in usb_disable_usb2_hardware_lpm()