1 /* -*- Mode: C; indent-tabs-mode:nil -*- */
3 * darwin backend for libusb 1.0
4 * Copyright © 2008-2019 Nathan Hjelm <hjelmn@users.sourceforge.net>
5 * Copyright © 2019 Google LLC. All rights reserved.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31 #include <sys/types.h>
34 #include <sys/sysctl.h>
36 #include <mach/clock.h>
37 #include <mach/clock_types.h>
38 #include <mach/mach_host.h>
39 #include <mach/mach_port.h>
41 /* Suppress warnings about the use of the deprecated objc_registerThreadWithCollector
42 * function. Its use is also conditionalized to only older deployment targets. */
43 #define OBJC_SILENCE_GC_DEPRECATIONS 1
45 #include <AvailabilityMacros.h>
46 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
47 #include <objc/objc-auto.h>
50 #include "darwin_usb.h"
52 static pthread_mutex_t libusb_darwin_init_mutex = PTHREAD_MUTEX_INITIALIZER;
53 static int init_count = 0;
55 /* async event thread */
56 static pthread_mutex_t libusb_darwin_at_mutex = PTHREAD_MUTEX_INITIALIZER;
57 static pthread_cond_t libusb_darwin_at_cond = PTHREAD_COND_INITIALIZER;
59 #if !defined(HAVE_CLOCK_GETTIME)
60 static clock_serv_t clock_realtime;
61 static clock_serv_t clock_monotonic;
64 #define LIBUSB_DARWIN_STARTUP_FAILURE ((CFRunLoopRef) -1)
66 static CFRunLoopRef libusb_darwin_acfl = NULL; /* event cf loop */
67 static CFRunLoopSourceRef libusb_darwin_acfls = NULL; /* shutdown signal for event cf loop */
69 static usbi_mutex_t darwin_cached_devices_lock = PTHREAD_MUTEX_INITIALIZER;
70 static struct list_head darwin_cached_devices;
71 static const char *darwin_device_class = kIOUSBDeviceClassName;
73 #define DARWIN_CACHED_DEVICE(a) (((struct darwin_device_priv *)usbi_get_device_priv((a)))->dev)
75 /* async event thread */
76 static pthread_t libusb_darwin_at;
78 static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, void *buffer, size_t len);
79 static int darwin_claim_interface(struct libusb_device_handle *dev_handle, uint8_t iface);
80 static int darwin_release_interface(struct libusb_device_handle *dev_handle, uint8_t iface);
81 static int darwin_reset_device(struct libusb_device_handle *dev_handle);
82 static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0);
84 static enum libusb_error darwin_scan_devices(struct libusb_context *ctx);
85 static enum libusb_error process_new_device (struct libusb_context *ctx, struct darwin_cached_device *cached_device,
86 UInt64 old_session_id);
88 static enum libusb_error darwin_get_cached_device(io_service_t service, struct darwin_cached_device **cached_out,
89 UInt64 *old_session_id);
91 #if defined(ENABLE_LOGGING)
92 static const char *darwin_error_str (IOReturn result) {
93 static char string_buffer[50];
95 case kIOReturnSuccess:
97 case kIOReturnNotOpen:
98 return "device not opened for exclusive access";
99 case kIOReturnNoDevice:
100 return "no connection to an IOService";
101 case kIOUSBNoAsyncPortErr:
102 return "no async port has been opened for interface";
103 case kIOReturnExclusiveAccess:
104 return "another process has device opened for exclusive access";
105 case kIOUSBPipeStalled:
106 return "pipe is stalled";
108 return "could not establish a connection to the Darwin kernel";
109 case kIOUSBTransactionTimeout:
110 return "transaction timed out";
111 case kIOReturnBadArgument:
112 return "invalid argument";
113 case kIOReturnAborted:
114 return "transaction aborted";
115 case kIOReturnNotResponding:
116 return "device not responding";
117 case kIOReturnOverrun:
118 return "data overrun";
119 case kIOReturnCannotWire:
120 return "physical memory can not be wired down";
121 case kIOReturnNoResources:
122 return "out of resources";
123 case kIOUSBHighSpeedSplitError:
124 return "high speed split error";
126 snprintf(string_buffer, sizeof(string_buffer), "unknown error (0x%x)", result);
127 return string_buffer;
132 static enum libusb_error darwin_to_libusb (IOReturn result) {
134 case kIOReturnUnderrun:
135 case kIOReturnSuccess:
136 return LIBUSB_SUCCESS;
137 case kIOReturnNotOpen:
138 case kIOReturnNoDevice:
139 return LIBUSB_ERROR_NO_DEVICE;
140 case kIOReturnExclusiveAccess:
141 return LIBUSB_ERROR_ACCESS;
142 case kIOUSBPipeStalled:
143 return LIBUSB_ERROR_PIPE;
144 case kIOReturnBadArgument:
145 return LIBUSB_ERROR_INVALID_PARAM;
146 case kIOUSBTransactionTimeout:
147 return LIBUSB_ERROR_TIMEOUT;
148 case kIOReturnNotResponding:
149 case kIOReturnAborted:
151 case kIOUSBNoAsyncPortErr:
153 return LIBUSB_ERROR_OTHER;
157 /* this function must be called with the darwin_cached_devices_lock held */
158 static void darwin_deref_cached_device(struct darwin_cached_device *cached_dev) {
159 cached_dev->refcount--;
160 /* free the device and remove it from the cache */
161 if (0 == cached_dev->refcount) {
162 list_del(&cached_dev->list);
164 if (cached_dev->device) {
165 (*(cached_dev->device))->Release(cached_dev->device);
166 cached_dev->device = NULL;
172 static void darwin_ref_cached_device(struct darwin_cached_device *cached_dev) {
173 cached_dev->refcount++;
176 static int ep_to_pipeRef(struct libusb_device_handle *dev_handle, uint8_t ep, uint8_t *pipep, uint8_t *ifcp, struct darwin_interface **interface_out) {
177 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
179 /* current interface */
180 struct darwin_interface *cInterface;
184 usbi_dbg ("converting ep address 0x%02x to pipeRef and interface", ep);
186 for (iface = 0 ; iface < USB_MAXINTERFACES ; iface++) {
187 cInterface = &priv->interfaces[iface];
189 if (dev_handle->claimed_interfaces & (1U << iface)) {
190 for (i = 0 ; i < cInterface->num_endpoints ; i++) {
191 if (cInterface->endpoint_addrs[i] == ep) {
198 *interface_out = cInterface;
200 usbi_dbg ("pipe %d on interface %d matches", *pipep, iface);
201 return LIBUSB_SUCCESS;
207 /* No pipe found with the correct endpoint address */
208 usbi_warn (HANDLE_CTX(dev_handle), "no pipeRef found with endpoint address 0x%02x.", ep);
210 return LIBUSB_ERROR_NOT_FOUND;
213 static IOReturn usb_setup_device_iterator (io_iterator_t *deviceIterator, UInt32 location) {
214 CFMutableDictionaryRef matchingDict = IOServiceMatching(darwin_device_class);
217 return kIOReturnError;
220 CFMutableDictionaryRef propertyMatchDict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
221 &kCFTypeDictionaryKeyCallBacks,
222 &kCFTypeDictionaryValueCallBacks);
224 /* there are no unsigned CFNumber types so treat the value as signed. the OS seems to do this
225 internally (CFNumberType of locationID is kCFNumberSInt32Type) */
226 CFTypeRef locationCF = CFNumberCreate (NULL, kCFNumberSInt32Type, &location);
228 if (propertyMatchDict && locationCF) {
229 CFDictionarySetValue (propertyMatchDict, CFSTR(kUSBDevicePropertyLocationID), locationCF);
230 CFDictionarySetValue (matchingDict, CFSTR(kIOPropertyMatchKey), propertyMatchDict);
232 /* else we can still proceed as long as the caller accounts for the possibility of other devices in the iterator */
234 /* release our references as per the Create Rule */
235 if (propertyMatchDict)
236 CFRelease (propertyMatchDict);
238 CFRelease (locationCF);
241 return IOServiceGetMatchingServices(kIOMasterPortDefault, matchingDict, deviceIterator);
244 /* Returns 1 on success, 0 on failure. */
245 static bool get_ioregistry_value_number (io_service_t service, CFStringRef property, CFNumberType type, void *p) {
246 CFTypeRef cfNumber = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
250 if (CFGetTypeID(cfNumber) == CFNumberGetTypeID()) {
251 success = CFNumberGetValue(cfNumber, type, p);
254 CFRelease (cfNumber);
257 return (success != 0);
260 /* Returns 1 on success, 0 on failure. */
261 static bool get_ioregistry_value_data (io_service_t service, CFStringRef property, ssize_t size, void *p) {
262 CFTypeRef cfData = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
263 bool success = false;
266 if (CFGetTypeID (cfData) == CFDataGetTypeID ()) {
267 CFIndex length = CFDataGetLength (cfData);
272 CFDataGetBytes (cfData, CFRangeMake(0, size), p);
282 static usb_device_t **darwin_device_from_service (io_service_t service)
284 io_cf_plugin_ref_t *plugInInterface = NULL;
285 usb_device_t **device;
288 const int max_retries = 5;
290 /* The IOCreatePlugInInterfaceForService function might consistently return
291 an "out of resources" error with certain USB devices the first time we run
292 it. The reason is still unclear, but retrying fixes the problem */
293 for (int count = 0; count < max_retries; count++) {
294 kresult = IOCreatePlugInInterfaceForService(service, kIOUSBDeviceUserClientTypeID,
295 kIOCFPlugInInterfaceID, &plugInInterface,
297 if (kIOReturnSuccess == kresult && plugInInterface) {
301 usbi_dbg ("set up plugin for service retry: %s", darwin_error_str (kresult));
303 /* sleep for a little while before trying again */
304 nanosleep(&(struct timespec){.tv_sec = 0, .tv_nsec = 1000}, NULL);
307 if (kIOReturnSuccess != kresult || !plugInInterface) {
308 usbi_dbg ("could not set up plugin for service: %s", darwin_error_str (kresult));
312 (void)(*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(DeviceInterfaceID),
314 /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
315 (*plugInInterface)->Release (plugInInterface);
320 static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) {
322 struct darwin_cached_device *cached_device;
323 UInt64 old_session_id;
324 struct libusb_context *ctx;
325 io_service_t service;
328 usbi_mutex_lock(&active_contexts_lock);
330 while ((service = IOIteratorNext(add_devices))) {
331 ret = darwin_get_cached_device (service, &cached_device, &old_session_id);
332 if (ret < 0 || !cached_device->can_enumerate) {
336 /* add this device to each active context's device list */
337 list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) {
338 process_new_device (ctx, cached_device, old_session_id);
341 if (cached_device->in_reenumerate) {
342 usbi_dbg ("cached device in reset state. reset complete...");
343 cached_device->in_reenumerate = false;
346 IOObjectRelease(service);
349 usbi_mutex_unlock(&active_contexts_lock);
352 static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {
354 struct libusb_device *dev = NULL;
355 struct libusb_context *ctx;
356 struct darwin_cached_device *old_device;
362 usbi_mutex_lock(&active_contexts_lock);
364 while ((device = IOIteratorNext (rem_devices)) != 0) {
365 bool is_reenumerating = false;
367 /* get the location from the i/o registry */
368 ret = get_ioregistry_value_number (device, CFSTR("sessionID"), kCFNumberSInt64Type, &session);
369 IOObjectRelease (device);
373 /* we need to match darwin_ref_cached_device call made in darwin_get_cached_device function
374 otherwise no cached device will ever get freed */
375 usbi_mutex_lock(&darwin_cached_devices_lock);
376 list_for_each_entry(old_device, &darwin_cached_devices, list, struct darwin_cached_device) {
377 if (old_device->session == session) {
378 if (old_device->in_reenumerate) {
379 /* device is re-enumerating. do not dereference the device at this time. libusb_reset_device()
380 * will deref if needed. */
381 usbi_dbg ("detected device detatched due to re-enumeration");
383 /* the device object is no longer usable so go ahead and release it */
384 if (old_device->device) {
385 (*(old_device->device))->Release(old_device->device);
386 old_device->device = NULL;
389 is_reenumerating = true;
391 darwin_deref_cached_device (old_device);
398 usbi_mutex_unlock(&darwin_cached_devices_lock);
399 if (is_reenumerating) {
403 list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) {
404 usbi_dbg ("notifying context %p of device disconnect", ctx);
406 dev = usbi_get_device_by_session_id(ctx, (unsigned long) session);
408 /* signal the core that this device has been disconnected. the core will tear down this device
409 when the reference count reaches 0 */
410 usbi_disconnect_device(dev);
411 libusb_unref_device(dev);
416 usbi_mutex_unlock(&active_contexts_lock);
419 static void darwin_hotplug_poll (void)
421 /* not sure if 1 ms will be too long/short but it should work ok */
422 mach_timespec_t timeout = {.tv_sec = 0, .tv_nsec = 1000000ul};
424 /* since a kernel thread may notify the IOIterators used for
425 * hotplug notification we can't just clear the iterators.
426 * instead just wait until all IOService providers are quiet */
427 (void) IOKitWaitQuiet (kIOMasterPortDefault, &timeout);
430 static void darwin_clear_iterator (io_iterator_t iter) {
433 while ((device = IOIteratorNext (iter)) != 0)
434 IOObjectRelease (device);
437 static void darwin_fail_startup(void) {
438 pthread_mutex_lock (&libusb_darwin_at_mutex);
439 libusb_darwin_acfl = LIBUSB_DARWIN_STARTUP_FAILURE;
440 pthread_cond_signal (&libusb_darwin_at_cond);
441 pthread_mutex_unlock (&libusb_darwin_at_mutex);
445 static void *darwin_event_thread_main (void *arg0) {
447 struct libusb_context *ctx = (struct libusb_context *)arg0;
448 CFRunLoopRef runloop;
449 CFRunLoopSourceRef libusb_shutdown_cfsource;
450 CFRunLoopSourceContext libusb_shutdown_cfsourcectx;
452 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
453 /* Set this thread's name, so it can be seen in the debugger
454 and crash reports. */
455 pthread_setname_np ("org.libusb.device-hotplug");
458 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
459 /* Tell the Objective-C garbage collector about this thread.
460 This is required because, unlike NSThreads, pthreads are
461 not automatically registered. Although we don't use
462 Objective-C, we use CoreFoundation, which does.
463 Garbage collection support was entirely removed in 10.12,
464 so don't bother there. */
465 objc_registerThreadWithCollector();
468 /* hotplug (device arrival/removal) sources */
469 CFRunLoopSourceRef libusb_notification_cfsource;
470 io_notification_port_t libusb_notification_port;
471 io_iterator_t libusb_rem_device_iterator;
472 io_iterator_t libusb_add_device_iterator;
474 usbi_dbg ("creating hotplug event source");
476 runloop = CFRunLoopGetCurrent ();
479 /* add the shutdown cfsource to the run loop */
480 memset(&libusb_shutdown_cfsourcectx, 0, sizeof(libusb_shutdown_cfsourcectx));
481 libusb_shutdown_cfsourcectx.info = runloop;
482 libusb_shutdown_cfsourcectx.perform = (void (*)(void *))CFRunLoopStop;
483 libusb_shutdown_cfsource = CFRunLoopSourceCreate(NULL, 0, &libusb_shutdown_cfsourcectx);
484 CFRunLoopAddSource(runloop, libusb_shutdown_cfsource, kCFRunLoopDefaultMode);
486 /* add the notification port to the run loop */
487 libusb_notification_port = IONotificationPortCreate (kIOMasterPortDefault);
488 libusb_notification_cfsource = IONotificationPortGetRunLoopSource (libusb_notification_port);
489 CFRunLoopAddSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
491 /* create notifications for removed devices */
492 kresult = IOServiceAddMatchingNotification (libusb_notification_port, kIOTerminatedNotification,
493 IOServiceMatching(darwin_device_class),
494 darwin_devices_detached,
495 ctx, &libusb_rem_device_iterator);
497 if (kresult != kIOReturnSuccess) {
498 usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
499 CFRelease (libusb_shutdown_cfsource);
501 darwin_fail_startup ();
504 /* create notifications for attached devices */
505 kresult = IOServiceAddMatchingNotification(libusb_notification_port, kIOFirstMatchNotification,
506 IOServiceMatching(darwin_device_class),
507 darwin_devices_attached,
508 ctx, &libusb_add_device_iterator);
510 if (kresult != kIOReturnSuccess) {
511 usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
512 CFRelease (libusb_shutdown_cfsource);
514 darwin_fail_startup ();
518 darwin_clear_iterator (libusb_rem_device_iterator);
519 darwin_clear_iterator (libusb_add_device_iterator);
521 usbi_dbg ("darwin event thread ready to receive events");
523 /* signal the main thread that the hotplug runloop has been created. */
524 pthread_mutex_lock (&libusb_darwin_at_mutex);
525 libusb_darwin_acfl = runloop;
526 libusb_darwin_acfls = libusb_shutdown_cfsource;
527 pthread_cond_signal (&libusb_darwin_at_cond);
528 pthread_mutex_unlock (&libusb_darwin_at_mutex);
530 /* run the runloop */
533 usbi_dbg ("darwin event thread exiting");
535 /* signal the main thread that the hotplug runloop has finished. */
536 pthread_mutex_lock (&libusb_darwin_at_mutex);
537 libusb_darwin_acfls = NULL;
538 libusb_darwin_acfl = NULL;
539 pthread_cond_signal (&libusb_darwin_at_cond);
540 pthread_mutex_unlock (&libusb_darwin_at_mutex);
542 /* remove the notification cfsource */
543 CFRunLoopRemoveSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
545 /* remove the shutdown cfsource */
546 CFRunLoopRemoveSource(runloop, libusb_shutdown_cfsource, kCFRunLoopDefaultMode);
548 /* delete notification port */
549 IONotificationPortDestroy (libusb_notification_port);
551 /* delete iterators */
552 IOObjectRelease (libusb_rem_device_iterator);
553 IOObjectRelease (libusb_add_device_iterator);
555 CFRelease (libusb_shutdown_cfsource);
561 /* cleanup function to destroy cached devices */
562 static void darwin_cleanup_devices(void) {
563 struct darwin_cached_device *dev, *next;
565 list_for_each_entry_safe(dev, next, &darwin_cached_devices, list, struct darwin_cached_device) {
566 darwin_deref_cached_device(dev);
569 darwin_cached_devices.prev = darwin_cached_devices.next = NULL;
572 static int darwin_init(struct libusb_context *ctx) {
576 pthread_mutex_lock (&libusb_darwin_init_mutex);
578 first_init = (1 == ++init_count);
582 assert (NULL == darwin_cached_devices.next);
583 list_init (&darwin_cached_devices);
585 #if !defined(HAVE_CLOCK_GETTIME)
586 /* create the clocks that will be used if clock_gettime() is not available */
587 host_name_port_t host_self;
589 host_self = mach_host_self();
590 host_get_clock_service(host_self, CALENDAR_CLOCK, &clock_realtime);
591 host_get_clock_service(host_self, SYSTEM_CLOCK, &clock_monotonic);
592 mach_port_deallocate(mach_task_self(), host_self);
596 rc = darwin_scan_devices (ctx);
597 if (LIBUSB_SUCCESS != rc)
601 rc = pthread_create (&libusb_darwin_at, NULL, darwin_event_thread_main, ctx);
603 usbi_err (ctx, "could not create event thread, error %d", rc);
604 rc = LIBUSB_ERROR_OTHER;
608 pthread_mutex_lock (&libusb_darwin_at_mutex);
609 while (!libusb_darwin_acfl)
610 pthread_cond_wait (&libusb_darwin_at_cond, &libusb_darwin_at_mutex);
611 if (libusb_darwin_acfl == LIBUSB_DARWIN_STARTUP_FAILURE) {
612 libusb_darwin_acfl = NULL;
613 rc = LIBUSB_ERROR_OTHER;
615 pthread_mutex_unlock (&libusb_darwin_at_mutex);
618 pthread_join (libusb_darwin_at, NULL);
622 if (LIBUSB_SUCCESS != rc) {
624 darwin_cleanup_devices ();
625 #if !defined(HAVE_CLOCK_GETTIME)
626 mach_port_deallocate(mach_task_self(), clock_realtime);
627 mach_port_deallocate(mach_task_self(), clock_monotonic);
633 pthread_mutex_unlock (&libusb_darwin_init_mutex);
638 static void darwin_exit (struct libusb_context *ctx) {
641 pthread_mutex_lock (&libusb_darwin_init_mutex);
643 if (0 == --init_count) {
644 /* stop the event runloop and wait for the thread to terminate. */
645 pthread_mutex_lock (&libusb_darwin_at_mutex);
646 CFRunLoopSourceSignal (libusb_darwin_acfls);
647 CFRunLoopWakeUp (libusb_darwin_acfl);
648 while (libusb_darwin_acfl)
649 pthread_cond_wait (&libusb_darwin_at_cond, &libusb_darwin_at_mutex);
650 pthread_mutex_unlock (&libusb_darwin_at_mutex);
651 pthread_join (libusb_darwin_at, NULL);
653 darwin_cleanup_devices ();
655 #if !defined(HAVE_CLOCK_GETTIME)
656 mach_port_deallocate(mach_task_self(), clock_realtime);
657 mach_port_deallocate(mach_task_self(), clock_monotonic);
661 pthread_mutex_unlock (&libusb_darwin_init_mutex);
664 static int get_configuration_index (struct libusb_device *dev, UInt8 config_value) {
665 struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
667 IOUSBConfigurationDescriptorPtr desc;
670 /* is there a simpler way to determine the index? */
671 kresult = (*(priv->device))->GetNumberOfConfigurations (priv->device, &numConfig);
672 if (kresult != kIOReturnSuccess)
673 return darwin_to_libusb (kresult);
675 for (i = 0 ; i < numConfig ; i++) {
676 (*(priv->device))->GetConfigurationDescriptorPtr (priv->device, i, &desc);
678 if (desc->bConfigurationValue == config_value)
682 /* configuration not found */
683 return LIBUSB_ERROR_NOT_FOUND;
686 static int darwin_get_active_config_descriptor(struct libusb_device *dev, void *buffer, size_t len) {
687 struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
690 if (0 == priv->active_config)
691 return LIBUSB_ERROR_NOT_FOUND;
693 config_index = get_configuration_index (dev, priv->active_config);
694 if (config_index < 0)
697 assert(config_index >= 0 && config_index <= UINT8_MAX);
698 return darwin_get_config_descriptor (dev, (UInt8)config_index, buffer, len);
701 static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, void *buffer, size_t len) {
702 struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
703 IOUSBConfigurationDescriptorPtr desc;
707 if (!priv || !priv->device)
708 return LIBUSB_ERROR_OTHER;
710 kresult = (*priv->device)->GetConfigurationDescriptorPtr (priv->device, config_index, &desc);
711 if (kresult == kIOReturnSuccess) {
712 /* copy descriptor */
713 if (libusb_le16_to_cpu(desc->wTotalLength) < len)
714 len = libusb_le16_to_cpu(desc->wTotalLength);
716 memmove (buffer, desc, len);
719 ret = darwin_to_libusb (kresult);
720 if (ret != LIBUSB_SUCCESS)
726 /* check whether the os has configured the device */
727 static enum libusb_error darwin_check_configuration (struct libusb_context *ctx, struct darwin_cached_device *dev) {
728 usb_device_t **darwin_device = dev->device;
730 IOUSBConfigurationDescriptorPtr configDesc;
731 IOUSBFindInterfaceRequest request;
733 io_iterator_t interface_iterator;
734 io_service_t firstInterface;
736 if (dev->dev_descriptor.bNumConfigurations < 1) {
737 usbi_err (ctx, "device has no configurations");
738 return LIBUSB_ERROR_OTHER; /* no configurations at this speed so we can't use it */
741 /* checking the configuration of a root hub simulation takes ~1 s in 10.11. the device is
743 if (0x05ac == libusb_le16_to_cpu (dev->dev_descriptor.idVendor) &&
744 0x8005 == libusb_le16_to_cpu (dev->dev_descriptor.idProduct)) {
745 usbi_dbg ("ignoring configuration on root hub simulation");
746 dev->active_config = 0;
747 return LIBUSB_SUCCESS;
750 /* find the first configuration */
751 kresult = (*darwin_device)->GetConfigurationDescriptorPtr (darwin_device, 0, &configDesc);
752 dev->first_config = (kIOReturnSuccess == kresult) ? configDesc->bConfigurationValue : 1;
754 /* check if the device is already configured. there is probably a better way than iterating over the
755 to accomplish this (the trick is we need to avoid a call to GetConfigurations since buggy devices
756 might lock up on the device request) */
758 /* Setup the Interface Request */
759 request.bInterfaceClass = kIOUSBFindInterfaceDontCare;
760 request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
761 request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
762 request.bAlternateSetting = kIOUSBFindInterfaceDontCare;
764 kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator);
765 if (kresult != kIOReturnSuccess)
766 return darwin_to_libusb (kresult);
769 firstInterface = IOIteratorNext(interface_iterator);
771 /* done with the interface iterator */
772 IOObjectRelease(interface_iterator);
774 if (firstInterface) {
775 IOObjectRelease (firstInterface);
777 /* device is configured */
778 if (dev->dev_descriptor.bNumConfigurations == 1)
779 /* to avoid problems with some devices get the configurations value from the configuration descriptor */
780 dev->active_config = dev->first_config;
782 /* devices with more than one configuration should work with GetConfiguration */
783 (*darwin_device)->GetConfiguration (darwin_device, &dev->active_config);
786 dev->active_config = 0;
788 usbi_dbg ("active config: %u, first config: %u", dev->active_config, dev->first_config);
790 return LIBUSB_SUCCESS;
793 static IOReturn darwin_request_descriptor (usb_device_t **device, UInt8 desc, UInt8 desc_index, void *buffer, size_t buffer_size) {
794 IOUSBDevRequestTO req;
796 assert(buffer_size <= UINT16_MAX);
798 memset (buffer, 0, buffer_size);
800 /* Set up request for descriptor/ */
801 req.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBStandard, kUSBDevice);
802 req.bRequest = kUSBRqGetDescriptor;
803 req.wValue = (UInt16)(desc << 8);
804 req.wIndex = desc_index;
805 req.wLength = (UInt16)buffer_size;
807 req.noDataTimeout = 20;
808 req.completionTimeout = 100;
810 return (*device)->DeviceRequestTO (device, &req);
813 static enum libusb_error darwin_cache_device_descriptor (struct darwin_cached_device *dev) {
814 usb_device_t **device = dev->device;
816 long delay = 30000; // microseconds
817 int unsuspended = 0, try_unsuspend = 1, try_reconfigure = 1;
819 IOReturn ret = 0, ret2;
821 UInt16 idProduct, idVendor;
823 dev->can_enumerate = 0;
825 (*device)->GetDeviceClass (device, &bDeviceClass);
826 (*device)->GetDeviceProduct (device, &idProduct);
827 (*device)->GetDeviceVendor (device, &idVendor);
829 /* According to Apple's documentation the device must be open for DeviceRequest but we may not be able to open some
830 * devices and Apple's USB Prober doesn't bother to open the device before issuing a descriptor request. Still,
831 * to follow the spec as closely as possible, try opening the device */
832 is_open = ((*device)->USBDeviceOpenSeize(device) == kIOReturnSuccess);
835 /**** retrieve device descriptor ****/
836 ret = darwin_request_descriptor (device, kUSBDeviceDesc, 0, &dev->dev_descriptor, sizeof(dev->dev_descriptor));
838 if (kIOReturnOverrun == ret && kUSBDeviceDesc == dev->dev_descriptor.bDescriptorType)
839 /* received an overrun error but we still received a device descriptor */
840 ret = kIOReturnSuccess;
842 if (kIOUSBVendorIDAppleComputer == idVendor) {
843 /* NTH: don't bother retrying or unsuspending Apple devices */
847 if (kIOReturnSuccess == ret && (0 == dev->dev_descriptor.bNumConfigurations ||
848 0 == dev->dev_descriptor.bcdUSB)) {
849 /* work around for incorrectly configured devices */
850 if (try_reconfigure && is_open) {
851 usbi_dbg("descriptor appears to be invalid. resetting configuration before trying again...");
853 /* set the first configuration */
854 (*device)->SetConfiguration(device, 1);
856 /* don't try to reconfigure again */
860 ret = kIOUSBPipeStalled;
863 if (kIOReturnSuccess != ret && is_open && try_unsuspend) {
864 /* device may be suspended. unsuspend it and try again */
865 #if DeviceVersion >= 320
868 /* IOUSBFamily 320+ provides a way to detect device suspension but earlier versions do not */
869 (void)(*device)->GetUSBDeviceInformation (device, &info);
871 /* note that the device was suspended */
872 if (info & (1U << kUSBInformationDeviceIsSuspendedBit) || 0 == info)
877 /* try to unsuspend the device */
878 ret2 = (*device)->USBDeviceSuspend (device, 0);
879 if (kIOReturnSuccess != ret2) {
880 /* prevent log spew from poorly behaving devices. this indicates the
881 os actually had trouble communicating with the device */
882 usbi_dbg("could not retrieve device descriptor. failed to unsuspend: %s",darwin_error_str(ret2));
890 if (kIOReturnSuccess != ret) {
891 usbi_dbg("kernel responded with code: 0x%08x. sleeping for %ld ms before trying again", ret, delay/1000);
892 /* sleep for a little while before trying again */
893 nanosleep(&(struct timespec){delay / 1000000, (delay * 1000) % 1000000000}, NULL);
895 } while (kIOReturnSuccess != ret && retries--);
898 /* resuspend the device */
899 (void)(*device)->USBDeviceSuspend (device, 1);
902 (void) (*device)->USBDeviceClose (device);
904 if (ret != kIOReturnSuccess) {
905 /* a debug message was already printed out for this error */
906 if (LIBUSB_CLASS_HUB == bDeviceClass)
907 usbi_dbg ("could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device",
908 idVendor, idProduct, darwin_error_str (ret), ret);
910 usbi_warn (NULL, "could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device",
911 idVendor, idProduct, darwin_error_str (ret), ret);
912 return darwin_to_libusb (ret);
915 /* catch buggy hubs (which appear to be virtual). Apple's own USB prober has problems with these devices. */
916 if (libusb_le16_to_cpu (dev->dev_descriptor.idProduct) != idProduct) {
917 /* not a valid device */
918 usbi_warn (NULL, "idProduct from iokit (%04x) does not match idProduct in descriptor (%04x). skipping device",
919 idProduct, libusb_le16_to_cpu (dev->dev_descriptor.idProduct));
920 return LIBUSB_ERROR_NO_DEVICE;
923 usbi_dbg ("cached device descriptor:");
924 usbi_dbg (" bDescriptorType: 0x%02x", dev->dev_descriptor.bDescriptorType);
925 usbi_dbg (" bcdUSB: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.bcdUSB));
926 usbi_dbg (" bDeviceClass: 0x%02x", dev->dev_descriptor.bDeviceClass);
927 usbi_dbg (" bDeviceSubClass: 0x%02x", dev->dev_descriptor.bDeviceSubClass);
928 usbi_dbg (" bDeviceProtocol: 0x%02x", dev->dev_descriptor.bDeviceProtocol);
929 usbi_dbg (" bMaxPacketSize0: 0x%02x", dev->dev_descriptor.bMaxPacketSize0);
930 usbi_dbg (" idVendor: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.idVendor));
931 usbi_dbg (" idProduct: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.idProduct));
932 usbi_dbg (" bcdDevice: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.bcdDevice));
933 usbi_dbg (" iManufacturer: 0x%02x", dev->dev_descriptor.iManufacturer);
934 usbi_dbg (" iProduct: 0x%02x", dev->dev_descriptor.iProduct);
935 usbi_dbg (" iSerialNumber: 0x%02x", dev->dev_descriptor.iSerialNumber);
936 usbi_dbg (" bNumConfigurations: 0x%02x", dev->dev_descriptor.bNumConfigurations);
938 dev->can_enumerate = 1;
940 return LIBUSB_SUCCESS;
943 /* Returns 1 on success, 0 on failure. */
944 static bool get_device_port (io_service_t service, UInt8 *port) {
949 if (get_ioregistry_value_number (service, CFSTR("PortNum"), kCFNumberSInt8Type, port)) {
953 kresult = IORegistryEntryGetParentEntry (service, kIOServicePlane, &parent);
954 if (kIOReturnSuccess == kresult) {
955 ret = get_ioregistry_value_data (parent, CFSTR("port"), 1, port);
956 IOObjectRelease (parent);
962 /* Returns 1 on success, 0 on failure. */
963 static bool get_device_parent_sessionID(io_service_t service, UInt64 *parent_sessionID) {
967 /* Walk up the tree in the IOService plane until we find a parent that has a sessionID */
969 while((kresult = IORegistryEntryGetParentEntry (parent, kIOUSBPlane, &parent)) == kIOReturnSuccess) {
970 if (get_ioregistry_value_number (parent, CFSTR("sessionID"), kCFNumberSInt64Type, parent_sessionID)) {
976 /* We ran out of parents */
980 static enum libusb_error darwin_get_cached_device(io_service_t service, struct darwin_cached_device **cached_out,
981 UInt64 *old_session_id) {
982 struct darwin_cached_device *new_device;
983 UInt64 sessionID = 0, parent_sessionID = 0;
984 UInt32 locationID = 0;
985 enum libusb_error ret = LIBUSB_SUCCESS;
986 usb_device_t **device;
989 /* assuming sessionID != 0 normally (never seen it be 0) */
993 /* get some info from the io registry */
994 (void) get_ioregistry_value_number (service, CFSTR("sessionID"), kCFNumberSInt64Type, &sessionID);
995 (void) get_ioregistry_value_number (service, CFSTR("locationID"), kCFNumberSInt32Type, &locationID);
996 if (!get_device_port (service, &port)) {
997 usbi_dbg("could not get connected port number");
1000 usbi_dbg("finding cached device for sessionID 0x%" PRIx64, sessionID);
1002 if (get_device_parent_sessionID(service, &parent_sessionID)) {
1003 usbi_dbg("parent sessionID: 0x%" PRIx64, parent_sessionID);
1006 usbi_mutex_lock(&darwin_cached_devices_lock);
1008 list_for_each_entry(new_device, &darwin_cached_devices, list, struct darwin_cached_device) {
1009 usbi_dbg("matching sessionID/locationID 0x%" PRIx64 "/0x%x against cached device with sessionID/locationID 0x%" PRIx64 "/0x%x",
1010 sessionID, locationID, new_device->session, new_device->location);
1011 if (new_device->location == locationID && new_device->in_reenumerate) {
1012 usbi_dbg ("found cached device with matching location that is being re-enumerated");
1013 *old_session_id = new_device->session;
1017 if (new_device->session == sessionID) {
1018 usbi_dbg("using cached device for device");
1019 *cached_out = new_device;
1027 usbi_dbg("caching new device with sessionID 0x%" PRIx64, sessionID);
1029 device = darwin_device_from_service (service);
1031 ret = LIBUSB_ERROR_NO_DEVICE;
1035 if (!(*old_session_id)) {
1036 new_device = calloc (1, sizeof (*new_device));
1038 ret = LIBUSB_ERROR_NO_MEM;
1042 /* add this device to the cached device list */
1043 list_add(&new_device->list, &darwin_cached_devices);
1045 (*device)->GetDeviceAddress (device, (USBDeviceAddress *)&new_device->address);
1047 /* keep a reference to this device */
1048 darwin_ref_cached_device(new_device);
1050 (*device)->GetLocationID (device, &new_device->location);
1051 new_device->port = port;
1052 new_device->parent_session = parent_sessionID;
1055 /* keep track of devices regardless of if we successfully enumerate them to
1056 prevent them from being enumerated multiple times */
1057 *cached_out = new_device;
1059 new_device->session = sessionID;
1060 new_device->device = device;
1062 /* cache the device descriptor */
1063 ret = darwin_cache_device_descriptor(new_device);
1067 if (new_device->can_enumerate) {
1068 snprintf(new_device->sys_path, 20, "%03i-%04x-%04x-%02x-%02x", new_device->address,
1069 libusb_le16_to_cpu (new_device->dev_descriptor.idVendor),
1070 libusb_le16_to_cpu (new_device->dev_descriptor.idProduct),
1071 new_device->dev_descriptor.bDeviceClass, new_device->dev_descriptor.bDeviceSubClass);
1075 usbi_mutex_unlock(&darwin_cached_devices_lock);
1080 static enum libusb_error process_new_device (struct libusb_context *ctx, struct darwin_cached_device *cached_device,
1081 UInt64 old_session_id) {
1082 struct darwin_device_priv *priv;
1083 struct libusb_device *dev = NULL;
1085 enum libusb_error ret = LIBUSB_SUCCESS;
1088 /* check current active configuration (and cache the first configuration value--
1089 which may be used by claim_interface) */
1090 ret = darwin_check_configuration (ctx, cached_device);
1094 if (0 != old_session_id) {
1095 usbi_dbg ("re-using existing device from context %p for with session 0x%" PRIx64 " new session 0x%" PRIx64,
1096 ctx, old_session_id, cached_device->session);
1097 /* save the libusb device before the session id is updated */
1098 dev = usbi_get_device_by_session_id (ctx, (unsigned long) old_session_id);
1102 usbi_dbg ("allocating new device in context %p for with session 0x%" PRIx64,
1103 ctx, cached_device->session);
1105 dev = usbi_alloc_device(ctx, (unsigned long) cached_device->session);
1107 return LIBUSB_ERROR_NO_MEM;
1110 priv = usbi_get_device_priv(dev);
1112 priv->dev = cached_device;
1113 darwin_ref_cached_device (priv->dev);
1114 dev->port_number = cached_device->port;
1115 dev->bus_number = cached_device->location >> 24;
1116 assert(cached_device->address <= UINT8_MAX);
1117 dev->device_address = (uint8_t)cached_device->address;
1119 priv = usbi_get_device_priv(dev);
1122 static_assert(sizeof(dev->device_descriptor) == sizeof(cached_device->dev_descriptor),
1123 "mismatch between libusb and IOKit device descriptor sizes");
1124 memcpy(&dev->device_descriptor, &cached_device->dev_descriptor, LIBUSB_DT_DEVICE_SIZE);
1125 usbi_localize_device_descriptor(&dev->device_descriptor);
1126 dev->session_data = cached_device->session;
1128 if (cached_device->parent_session > 0) {
1129 dev->parent_dev = usbi_get_device_by_session_id (ctx, (unsigned long) cached_device->parent_session);
1131 dev->parent_dev = NULL;
1134 (*(priv->dev->device))->GetDeviceSpeed (priv->dev->device, &devSpeed);
1137 case kUSBDeviceSpeedLow: dev->speed = LIBUSB_SPEED_LOW; break;
1138 case kUSBDeviceSpeedFull: dev->speed = LIBUSB_SPEED_FULL; break;
1139 case kUSBDeviceSpeedHigh: dev->speed = LIBUSB_SPEED_HIGH; break;
1140 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
1141 case kUSBDeviceSpeedSuper: dev->speed = LIBUSB_SPEED_SUPER; break;
1143 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 101200
1144 case kUSBDeviceSpeedSuperPlus: dev->speed = LIBUSB_SPEED_SUPER_PLUS; break;
1147 usbi_warn (ctx, "Got unknown device speed %d", devSpeed);
1150 ret = usbi_sanitize_device (dev);
1154 usbi_dbg ("found device with address %d port = %d parent = %p at %p", dev->device_address,
1155 dev->port_number, (void *) dev->parent_dev, priv->dev->sys_path);
1159 if (!cached_device->in_reenumerate && 0 == ret) {
1160 usbi_connect_device (dev);
1162 libusb_unref_device (dev);
1168 static enum libusb_error darwin_scan_devices(struct libusb_context *ctx) {
1169 struct darwin_cached_device *cached_device;
1170 UInt64 old_session_id;
1171 io_iterator_t deviceIterator;
1172 io_service_t service;
1176 kresult = usb_setup_device_iterator (&deviceIterator, 0);
1177 if (kresult != kIOReturnSuccess)
1178 return darwin_to_libusb (kresult);
1180 while ((service = IOIteratorNext (deviceIterator))) {
1181 ret = darwin_get_cached_device (service, &cached_device, &old_session_id);
1182 if (ret < 0 || !cached_device->can_enumerate) {
1186 (void) process_new_device (ctx, cached_device, old_session_id);
1188 IOObjectRelease(service);
1191 IOObjectRelease(deviceIterator);
1193 return LIBUSB_SUCCESS;
1196 static int darwin_open (struct libusb_device_handle *dev_handle) {
1197 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1198 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1201 if (0 == dpriv->open_count) {
1202 /* try to open the device */
1203 kresult = (*(dpriv->device))->USBDeviceOpenSeize (dpriv->device);
1204 if (kresult != kIOReturnSuccess) {
1205 usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceOpen: %s", darwin_error_str(kresult));
1207 if (kIOReturnExclusiveAccess != kresult) {
1208 return darwin_to_libusb (kresult);
1211 /* it is possible to perform some actions on a device that is not open so do not return an error */
1212 priv->is_open = false;
1214 priv->is_open = true;
1217 /* create async event source */
1218 kresult = (*(dpriv->device))->CreateDeviceAsyncEventSource (dpriv->device, &priv->cfSource);
1219 if (kresult != kIOReturnSuccess) {
1220 usbi_err (HANDLE_CTX (dev_handle), "CreateDeviceAsyncEventSource: %s", darwin_error_str(kresult));
1222 if (priv->is_open) {
1223 (*(dpriv->device))->USBDeviceClose (dpriv->device);
1226 priv->is_open = false;
1228 return darwin_to_libusb (kresult);
1231 CFRetain (libusb_darwin_acfl);
1233 /* add the cfSource to the aync run loop */
1234 CFRunLoopAddSource(libusb_darwin_acfl, priv->cfSource, kCFRunLoopCommonModes);
1237 /* device opened successfully */
1238 dpriv->open_count++;
1240 usbi_dbg ("device open for access");
1245 static void darwin_close (struct libusb_device_handle *dev_handle) {
1246 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1247 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1251 if (dpriv->open_count == 0) {
1252 /* something is probably very wrong if this is the case */
1253 usbi_err (HANDLE_CTX (dev_handle), "Close called on a device that was not open!");
1257 dpriv->open_count--;
1259 /* make sure all interfaces are released */
1260 for (i = 0 ; i < USB_MAXINTERFACES ; i++)
1261 if (dev_handle->claimed_interfaces & (1U << i))
1262 libusb_release_interface (dev_handle, i);
1264 if (0 == dpriv->open_count) {
1265 /* delete the device's async event source */
1266 if (priv->cfSource) {
1267 CFRunLoopRemoveSource (libusb_darwin_acfl, priv->cfSource, kCFRunLoopDefaultMode);
1268 CFRelease (priv->cfSource);
1269 priv->cfSource = NULL;
1270 CFRelease (libusb_darwin_acfl);
1273 if (priv->is_open) {
1274 /* close the device */
1275 kresult = (*(dpriv->device))->USBDeviceClose(dpriv->device);
1276 if (kresult != kIOReturnSuccess) {
1277 /* Log the fact that we had a problem closing the file, however failing a
1278 * close isn't really an error, so return success anyway */
1279 usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceClose: %s", darwin_error_str(kresult));
1285 static int darwin_get_configuration(struct libusb_device_handle *dev_handle, uint8_t *config) {
1286 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1288 *config = dpriv->active_config;
1290 return LIBUSB_SUCCESS;
1293 static enum libusb_error darwin_set_configuration(struct libusb_device_handle *dev_handle, int config) {
1294 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1301 /* Setting configuration will invalidate the interface, so we need
1302 to reclaim it. First, dispose of existing interfaces, if any. */
1303 for (i = 0 ; i < USB_MAXINTERFACES ; i++)
1304 if (dev_handle->claimed_interfaces & (1U << i))
1305 darwin_release_interface (dev_handle, i);
1307 kresult = (*(dpriv->device))->SetConfiguration (dpriv->device, (UInt8)config);
1308 if (kresult != kIOReturnSuccess)
1309 return darwin_to_libusb (kresult);
1311 /* Reclaim any interfaces. */
1312 for (i = 0 ; i < USB_MAXINTERFACES ; i++)
1313 if (dev_handle->claimed_interfaces & (1U << i))
1314 darwin_claim_interface (dev_handle, i);
1316 dpriv->active_config = (UInt8)config;
1318 return LIBUSB_SUCCESS;
1321 static IOReturn darwin_get_interface (usb_device_t **darwin_device, uint8_t ifc, io_service_t *usbInterfacep) {
1322 IOUSBFindInterfaceRequest request;
1324 io_iterator_t interface_iterator;
1325 UInt8 bInterfaceNumber;
1328 *usbInterfacep = IO_OBJECT_NULL;
1330 /* Setup the Interface Request */
1331 request.bInterfaceClass = kIOUSBFindInterfaceDontCare;
1332 request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
1333 request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
1334 request.bAlternateSetting = kIOUSBFindInterfaceDontCare;
1336 kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator);
1337 if (kresult != kIOReturnSuccess)
1340 while ((*usbInterfacep = IOIteratorNext(interface_iterator))) {
1341 /* find the interface number */
1342 ret = get_ioregistry_value_number (*usbInterfacep, CFSTR("bInterfaceNumber"), kCFNumberSInt8Type,
1345 if (ret && bInterfaceNumber == ifc) {
1349 (void) IOObjectRelease (*usbInterfacep);
1352 /* done with the interface iterator */
1353 IOObjectRelease(interface_iterator);
1355 return kIOReturnSuccess;
1358 static enum libusb_error get_endpoints (struct libusb_device_handle *dev_handle, uint8_t iface) {
1359 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1361 /* current interface */
1362 struct darwin_interface *cInterface = &priv->interfaces[iface];
1366 UInt8 numep, direction, number;
1367 UInt8 dont_care1, dont_care3;
1371 usbi_dbg ("building table of endpoints.");
1373 /* retrieve the total number of endpoints on this interface */
1374 kresult = (*(cInterface->interface))->GetNumEndpoints(cInterface->interface, &numep);
1375 if (kresult != kIOReturnSuccess) {
1376 usbi_err (HANDLE_CTX (dev_handle), "can't get number of endpoints for interface: %s", darwin_error_str(kresult));
1377 return darwin_to_libusb (kresult);
1380 /* iterate through pipe references */
1381 for (UInt8 i = 1 ; i <= numep ; i++) {
1382 kresult = (*(cInterface->interface))->GetPipeProperties(cInterface->interface, i, &direction, &number, &dont_care1,
1383 &dont_care2, &dont_care3);
1385 if (kresult != kIOReturnSuccess) {
1386 /* probably a buggy device. try to get the endpoint address from the descriptors */
1387 struct libusb_config_descriptor *config;
1388 const struct libusb_endpoint_descriptor *endpoint_desc;
1391 kresult = (*(cInterface->interface))->GetAlternateSetting (cInterface->interface, &alt_setting);
1392 if (kresult != kIOReturnSuccess) {
1393 usbi_err (HANDLE_CTX (dev_handle), "can't get alternate setting for interface");
1394 return darwin_to_libusb (kresult);
1397 rc = libusb_get_active_config_descriptor (dev_handle->dev, &config);
1398 if (LIBUSB_SUCCESS != rc) {
1402 endpoint_desc = config->interface[iface].altsetting[alt_setting].endpoint + i - 1;
1404 cInterface->endpoint_addrs[i - 1] = endpoint_desc->bEndpointAddress;
1406 cInterface->endpoint_addrs[i - 1] = (UInt8)(((kUSBIn == direction) << kUSBRqDirnShift) | (number & LIBUSB_ENDPOINT_ADDRESS_MASK));
1409 usbi_dbg ("interface: %i pipe %i: dir: %i number: %i", iface, i, cInterface->endpoint_addrs[i - 1] >> kUSBRqDirnShift,
1410 cInterface->endpoint_addrs[i - 1] & LIBUSB_ENDPOINT_ADDRESS_MASK);
1413 cInterface->num_endpoints = numep;
1415 return LIBUSB_SUCCESS;
1418 static int darwin_claim_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
1419 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1420 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1421 io_service_t usbInterface = IO_OBJECT_NULL;
1423 enum libusb_error ret;
1424 IOCFPlugInInterface **plugInInterface = NULL;
1427 /* current interface */
1428 struct darwin_interface *cInterface = &priv->interfaces[iface];
1430 kresult = darwin_get_interface (dpriv->device, iface, &usbInterface);
1431 if (kresult != kIOReturnSuccess)
1432 return darwin_to_libusb (kresult);
1434 /* make sure we have an interface */
1435 if (!usbInterface && dpriv->first_config != 0) {
1436 usbi_info (HANDLE_CTX (dev_handle), "no interface found; setting configuration: %d", dpriv->first_config);
1438 /* set the configuration */
1439 ret = darwin_set_configuration (dev_handle, (int) dpriv->first_config);
1440 if (ret != LIBUSB_SUCCESS) {
1441 usbi_err (HANDLE_CTX (dev_handle), "could not set configuration");
1445 kresult = darwin_get_interface (dpriv->device, iface, &usbInterface);
1446 if (kresult != kIOReturnSuccess) {
1447 usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult));
1448 return darwin_to_libusb (kresult);
1452 if (!usbInterface) {
1453 usbi_err (HANDLE_CTX (dev_handle), "interface not found");
1454 return LIBUSB_ERROR_NOT_FOUND;
1457 /* get an interface to the device's interface */
1458 kresult = IOCreatePlugInInterfaceForService (usbInterface, kIOUSBInterfaceUserClientTypeID,
1459 kIOCFPlugInInterfaceID, &plugInInterface, &score);
1461 /* ignore release error */
1462 (void)IOObjectRelease (usbInterface);
1464 if (kresult != kIOReturnSuccess) {
1465 usbi_err (HANDLE_CTX (dev_handle), "IOCreatePlugInInterfaceForService: %s", darwin_error_str(kresult));
1466 return darwin_to_libusb (kresult);
1469 if (!plugInInterface) {
1470 usbi_err (HANDLE_CTX (dev_handle), "plugin interface not found");
1471 return LIBUSB_ERROR_NOT_FOUND;
1474 /* Do the actual claim */
1475 kresult = (*plugInInterface)->QueryInterface(plugInInterface,
1476 CFUUIDGetUUIDBytes(InterfaceInterfaceID),
1477 (LPVOID)&cInterface->interface);
1478 /* We no longer need the intermediate plug-in */
1479 /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
1480 (*plugInInterface)->Release (plugInInterface);
1481 if (kresult != kIOReturnSuccess || !cInterface->interface) {
1482 usbi_err (HANDLE_CTX (dev_handle), "QueryInterface: %s", darwin_error_str(kresult));
1483 return darwin_to_libusb (kresult);
1486 /* claim the interface */
1487 kresult = (*(cInterface->interface))->USBInterfaceOpen(cInterface->interface);
1488 if (kresult != kIOReturnSuccess) {
1489 usbi_err (HANDLE_CTX (dev_handle), "USBInterfaceOpen: %s", darwin_error_str(kresult));
1490 return darwin_to_libusb (kresult);
1493 /* update list of endpoints */
1494 ret = get_endpoints (dev_handle, iface);
1496 /* this should not happen */
1497 darwin_release_interface (dev_handle, iface);
1498 usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table");
1502 cInterface->cfSource = NULL;
1504 /* create async event source */
1505 kresult = (*(cInterface->interface))->CreateInterfaceAsyncEventSource (cInterface->interface, &cInterface->cfSource);
1506 if (kresult != kIOReturnSuccess) {
1507 usbi_err (HANDLE_CTX (dev_handle), "could not create async event source");
1509 /* can't continue without an async event source */
1510 (void)darwin_release_interface (dev_handle, iface);
1512 return darwin_to_libusb (kresult);
1515 /* add the cfSource to the async thread's run loop */
1516 CFRunLoopAddSource(libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
1518 usbi_dbg ("interface opened");
1520 return LIBUSB_SUCCESS;
1523 static int darwin_release_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
1524 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1527 /* current interface */
1528 struct darwin_interface *cInterface = &priv->interfaces[iface];
1530 /* Check to see if an interface is open */
1531 if (!cInterface->interface)
1532 return LIBUSB_SUCCESS;
1534 /* clean up endpoint data */
1535 cInterface->num_endpoints = 0;
1537 /* delete the interface's async event source */
1538 if (cInterface->cfSource) {
1539 CFRunLoopRemoveSource (libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
1540 CFRelease (cInterface->cfSource);
1543 kresult = (*(cInterface->interface))->USBInterfaceClose(cInterface->interface);
1544 if (kresult != kIOReturnSuccess)
1545 usbi_warn (HANDLE_CTX (dev_handle), "USBInterfaceClose: %s", darwin_error_str(kresult));
1547 kresult = (*(cInterface->interface))->Release(cInterface->interface);
1548 if (kresult != kIOReturnSuccess)
1549 usbi_warn (HANDLE_CTX (dev_handle), "Release: %s", darwin_error_str(kresult));
1551 cInterface->interface = (usb_interface_t **) IO_OBJECT_NULL;
1553 return darwin_to_libusb (kresult);
1556 static int darwin_set_interface_altsetting(struct libusb_device_handle *dev_handle, uint8_t iface, uint8_t altsetting) {
1557 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1559 enum libusb_error ret;
1561 /* current interface */
1562 struct darwin_interface *cInterface = &priv->interfaces[iface];
1564 if (!cInterface->interface)
1565 return LIBUSB_ERROR_NO_DEVICE;
1567 kresult = (*(cInterface->interface))->SetAlternateInterface (cInterface->interface, altsetting);
1568 if (kresult != kIOReturnSuccess)
1569 darwin_reset_device (dev_handle);
1571 /* update list of endpoints */
1572 ret = get_endpoints (dev_handle, iface);
1574 /* this should not happen */
1575 darwin_release_interface (dev_handle, iface);
1576 usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table");
1580 return darwin_to_libusb (kresult);
1583 static int darwin_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) {
1584 /* current interface */
1585 struct darwin_interface *cInterface;
1589 /* determine the interface/endpoint to use */
1590 if (ep_to_pipeRef (dev_handle, endpoint, &pipeRef, NULL, &cInterface) != 0) {
1591 usbi_err (HANDLE_CTX (dev_handle), "endpoint not found on any open interface");
1593 return LIBUSB_ERROR_NOT_FOUND;
1596 /* newer versions of darwin support clearing additional bits on the device's endpoint */
1597 kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
1598 if (kresult != kIOReturnSuccess)
1599 usbi_warn (HANDLE_CTX (dev_handle), "ClearPipeStall: %s", darwin_error_str (kresult));
1601 return darwin_to_libusb (kresult);
1604 static int darwin_restore_state (struct libusb_device_handle *dev_handle, int8_t active_config,
1605 unsigned long claimed_interfaces) {
1606 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1607 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1608 int open_count = dpriv->open_count;
1611 /* clear claimed interfaces temporarily */
1612 dev_handle->claimed_interfaces = 0;
1614 /* close and re-open the device */
1615 priv->is_open = false;
1616 dpriv->open_count = 1;
1618 /* clean up open interfaces */
1619 (void) darwin_close (dev_handle);
1621 /* re-open the device */
1622 ret = darwin_open (dev_handle);
1623 dpriv->open_count = open_count;
1624 if (LIBUSB_SUCCESS != ret) {
1625 /* could not restore configuration */
1626 return LIBUSB_ERROR_NOT_FOUND;
1629 if (dpriv->active_config != active_config) {
1630 usbi_dbg ("darwin/restore_state: restoring configuration %d...", active_config);
1632 ret = darwin_set_configuration (dev_handle, active_config);
1633 if (LIBUSB_SUCCESS != ret) {
1634 usbi_dbg ("darwin/restore_state: could not restore configuration");
1635 return LIBUSB_ERROR_NOT_FOUND;
1639 usbi_dbg ("darwin/restore_state: reclaiming interfaces");
1641 if (claimed_interfaces) {
1642 for (uint8_t iface = 0 ; iface < USB_MAXINTERFACES ; ++iface) {
1643 if (!(claimed_interfaces & (1U << iface))) {
1647 usbi_dbg ("darwin/restore_state: re-claiming interface %u", iface);
1649 ret = darwin_claim_interface (dev_handle, iface);
1650 if (LIBUSB_SUCCESS != ret) {
1651 usbi_dbg ("darwin/restore_state: could not claim interface %u", iface);
1652 return LIBUSB_ERROR_NOT_FOUND;
1655 dev_handle->claimed_interfaces |= 1U << iface;
1659 usbi_dbg ("darwin/restore_state: device state restored");
1661 return LIBUSB_SUCCESS;
1664 static int darwin_reset_device(struct libusb_device_handle *dev_handle) {
1665 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1666 unsigned long claimed_interfaces = dev_handle->claimed_interfaces;
1667 int8_t active_config = dpriv->active_config;
1668 IOUSBDeviceDescriptor descriptor;
1669 IOUSBConfigurationDescriptorPtr cached_configuration;
1670 IOUSBConfigurationDescriptor *cached_configurations;
1674 if (dpriv->in_reenumerate) {
1675 /* ack, two (or more) threads are trying to reset the device! abort! */
1676 return LIBUSB_ERROR_NOT_FOUND;
1679 dpriv->in_reenumerate = true;
1681 /* store copies of descriptors so they can be compared after the reset */
1682 memcpy (&descriptor, &dpriv->dev_descriptor, sizeof (descriptor));
1683 cached_configurations = alloca (sizeof (*cached_configurations) * descriptor.bNumConfigurations);
1685 for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
1686 (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
1687 memcpy (cached_configurations + i, cached_configuration, sizeof (cached_configurations[i]));
1690 /* from macOS 10.11 ResetDevice no longer does anything so just use USBDeviceReEnumerate */
1691 kresult = (*(dpriv->device))->USBDeviceReEnumerate (dpriv->device, 0);
1692 if (kresult != kIOReturnSuccess) {
1693 usbi_err (HANDLE_CTX (dev_handle), "USBDeviceReEnumerate: %s", darwin_error_str (kresult));
1694 dpriv->in_reenumerate = false;
1695 return darwin_to_libusb (kresult);
1698 usbi_dbg ("darwin/reset_device: waiting for re-enumeration to complete...");
1700 while (dpriv->in_reenumerate) {
1701 struct timespec delay = {.tv_sec = 0, .tv_nsec = 1000};
1702 nanosleep (&delay, NULL);
1705 /* compare descriptors */
1706 usbi_dbg ("darwin/reset_device: checking whether descriptors changed");
1708 if (memcmp (&descriptor, &dpriv->dev_descriptor, sizeof (descriptor))) {
1709 /* device descriptor changed. need to return not found. */
1710 usbi_dbg ("darwin/reset_device: device descriptor changed");
1711 return LIBUSB_ERROR_NOT_FOUND;
1714 for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
1715 (void) (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
1716 if (memcmp (cached_configuration, cached_configurations + i, sizeof (cached_configurations[i]))) {
1717 usbi_dbg ("darwin/reset_device: configuration descriptor %d changed", i);
1718 return LIBUSB_ERROR_NOT_FOUND;
1722 usbi_dbg ("darwin/reset_device: device reset complete. restoring state...");
1724 return darwin_restore_state (dev_handle, active_config, claimed_interfaces);
1727 static int darwin_kernel_driver_active(struct libusb_device_handle *dev_handle, uint8_t interface) {
1728 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1729 io_service_t usbInterface;
1733 kresult = darwin_get_interface (dpriv->device, interface, &usbInterface);
1734 if (kresult != kIOReturnSuccess) {
1735 usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult));
1737 return darwin_to_libusb (kresult);
1740 driver = IORegistryEntryCreateCFProperty (usbInterface, kIOBundleIdentifierKey, kCFAllocatorDefault, 0);
1741 IOObjectRelease (usbInterface);
1753 static void darwin_destroy_device(struct libusb_device *dev) {
1754 struct darwin_device_priv *dpriv = usbi_get_device_priv(dev);
1757 /* need to hold the lock in case this is the last reference to the device */
1758 usbi_mutex_lock(&darwin_cached_devices_lock);
1759 darwin_deref_cached_device (dpriv->dev);
1761 usbi_mutex_unlock(&darwin_cached_devices_lock);
1765 static int submit_bulk_transfer(struct usbi_transfer *itransfer) {
1766 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1769 uint8_t transferType;
1770 /* None of the values below are used in libusbx for bulk transfers */
1771 uint8_t direction, number, interval, pipeRef;
1772 uint16_t maxPacketSize;
1774 struct darwin_interface *cInterface;
1776 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1777 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1779 return LIBUSB_ERROR_NOT_FOUND;
1782 ret = (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1783 &transferType, &maxPacketSize, &interval);
1786 usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1787 darwin_error_str(ret), ret);
1788 return darwin_to_libusb (ret);
1791 if (0 != (transfer->length % maxPacketSize)) {
1792 /* do not need a zero packet */
1793 transfer->flags &= ~LIBUSB_TRANSFER_ADD_ZERO_PACKET;
1796 /* submit the request */
1797 /* timeouts are unavailable on interrupt endpoints */
1798 if (transferType == kUSBInterrupt) {
1799 if (IS_XFERIN(transfer))
1800 ret = (*(cInterface->interface))->ReadPipeAsync(cInterface->interface, pipeRef, transfer->buffer,
1801 (UInt32)transfer->length, darwin_async_io_callback, itransfer);
1803 ret = (*(cInterface->interface))->WritePipeAsync(cInterface->interface, pipeRef, transfer->buffer,
1804 (UInt32)transfer->length, darwin_async_io_callback, itransfer);
1806 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1808 if (IS_XFERIN(transfer))
1809 ret = (*(cInterface->interface))->ReadPipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
1810 (UInt32)transfer->length, transfer->timeout, transfer->timeout,
1811 darwin_async_io_callback, itransfer);
1813 ret = (*(cInterface->interface))->WritePipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
1814 (UInt32)transfer->length, transfer->timeout, transfer->timeout,
1815 darwin_async_io_callback, itransfer);
1819 usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1820 darwin_error_str(ret), ret);
1822 return darwin_to_libusb (ret);
1825 #if InterfaceVersion >= 550
1826 static int submit_stream_transfer(struct usbi_transfer *itransfer) {
1827 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1828 struct darwin_interface *cInterface;
1832 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1833 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1835 return LIBUSB_ERROR_NOT_FOUND;
1838 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1840 if (IS_XFERIN(transfer))
1841 ret = (*(cInterface->interface))->ReadStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
1842 transfer->buffer, (UInt32)transfer->length, transfer->timeout,
1843 transfer->timeout, darwin_async_io_callback, itransfer);
1845 ret = (*(cInterface->interface))->WriteStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
1846 transfer->buffer, (UInt32)transfer->length, transfer->timeout,
1847 transfer->timeout, darwin_async_io_callback, itransfer);
1850 usbi_err (TRANSFER_CTX (transfer), "bulk stream transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1851 darwin_error_str(ret), ret);
1853 return darwin_to_libusb (ret);
1857 static int submit_iso_transfer(struct usbi_transfer *itransfer) {
1858 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1859 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
1862 uint8_t direction, number, interval, pipeRef, transferType;
1863 uint16_t maxPacketSize;
1865 AbsoluteTime atTime;
1868 struct darwin_interface *cInterface;
1870 /* construct an array of IOUSBIsocFrames, reuse the old one if the sizes are the same */
1871 if (tpriv->num_iso_packets != transfer->num_iso_packets) {
1872 free(tpriv->isoc_framelist);
1873 tpriv->isoc_framelist = NULL;
1876 if (!tpriv->isoc_framelist) {
1877 tpriv->num_iso_packets = transfer->num_iso_packets;
1878 tpriv->isoc_framelist = (IOUSBIsocFrame*) calloc ((size_t)transfer->num_iso_packets, sizeof(IOUSBIsocFrame));
1879 if (!tpriv->isoc_framelist)
1880 return LIBUSB_ERROR_NO_MEM;
1883 /* copy the frame list from the libusb descriptor (the structures differ only is member order) */
1884 for (i = 0 ; i < transfer->num_iso_packets ; i++) {
1885 unsigned int length = transfer->iso_packet_desc[i].length;
1886 assert(length <= UINT16_MAX);
1887 tpriv->isoc_framelist[i].frReqCount = (UInt16)length;
1890 /* determine the interface/endpoint to use */
1891 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1892 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1894 return LIBUSB_ERROR_NOT_FOUND;
1897 /* determine the properties of this endpoint and the speed of the device */
1898 (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1899 &transferType, &maxPacketSize, &interval);
1901 /* Last but not least we need the bus frame number */
1902 kresult = (*(cInterface->interface))->GetBusFrameNumber(cInterface->interface, &frame, &atTime);
1903 if (kresult != kIOReturnSuccess) {
1904 usbi_err (TRANSFER_CTX (transfer), "failed to get bus frame number: %d", kresult);
1905 free(tpriv->isoc_framelist);
1906 tpriv->isoc_framelist = NULL;
1908 return darwin_to_libusb (kresult);
1911 (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1912 &transferType, &maxPacketSize, &interval);
1914 /* schedule for a frame a little in the future */
1917 if (cInterface->frames[transfer->endpoint] && frame < cInterface->frames[transfer->endpoint])
1918 frame = cInterface->frames[transfer->endpoint];
1920 /* submit the request */
1921 if (IS_XFERIN(transfer))
1922 kresult = (*(cInterface->interface))->ReadIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
1923 (UInt32)transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
1926 kresult = (*(cInterface->interface))->WriteIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
1927 (UInt32)transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
1930 if (LIBUSB_SPEED_FULL == transfer->dev_handle->dev->speed)
1932 cInterface->frames[transfer->endpoint] = frame + (UInt32)transfer->num_iso_packets * (1U << (interval - 1));
1934 /* High/super speed */
1935 cInterface->frames[transfer->endpoint] = frame + (UInt32)transfer->num_iso_packets * (1U << (interval - 1)) / 8;
1937 if (kresult != kIOReturnSuccess) {
1938 usbi_err (TRANSFER_CTX (transfer), "isochronous transfer failed (dir: %s): %s", IS_XFERIN(transfer) ? "In" : "Out",
1939 darwin_error_str(kresult));
1940 free (tpriv->isoc_framelist);
1941 tpriv->isoc_framelist = NULL;
1944 return darwin_to_libusb (kresult);
1947 static int submit_control_transfer(struct usbi_transfer *itransfer) {
1948 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1949 struct libusb_control_setup *setup = (struct libusb_control_setup *) transfer->buffer;
1950 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
1951 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
1955 memset(&tpriv->req, 0, sizeof(tpriv->req));
1957 /* IOUSBDeviceInterface expects the request in cpu endianness */
1958 tpriv->req.bmRequestType = setup->bmRequestType;
1959 tpriv->req.bRequest = setup->bRequest;
1960 /* these values should be in bus order from libusb_fill_control_setup */
1961 tpriv->req.wValue = OSSwapLittleToHostInt16 (setup->wValue);
1962 tpriv->req.wIndex = OSSwapLittleToHostInt16 (setup->wIndex);
1963 tpriv->req.wLength = OSSwapLittleToHostInt16 (setup->wLength);
1964 /* data is stored after the libusb control block */
1965 tpriv->req.pData = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
1966 tpriv->req.completionTimeout = transfer->timeout;
1967 tpriv->req.noDataTimeout = transfer->timeout;
1969 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1971 /* all transfers in libusb-1.0 are async */
1973 if (transfer->endpoint) {
1974 struct darwin_interface *cInterface;
1977 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1978 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1980 return LIBUSB_ERROR_NOT_FOUND;
1983 kresult = (*(cInterface->interface))->ControlRequestAsyncTO (cInterface->interface, pipeRef, &(tpriv->req), darwin_async_io_callback, itransfer);
1985 /* control request on endpoint 0 */
1986 kresult = (*(dpriv->device))->DeviceRequestAsyncTO(dpriv->device, &(tpriv->req), darwin_async_io_callback, itransfer);
1988 if (kresult != kIOReturnSuccess)
1989 usbi_err (TRANSFER_CTX (transfer), "control request failed: %s", darwin_error_str(kresult));
1991 return darwin_to_libusb (kresult);
1994 static int darwin_submit_transfer(struct usbi_transfer *itransfer) {
1995 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1997 switch (transfer->type) {
1998 case LIBUSB_TRANSFER_TYPE_CONTROL:
1999 return submit_control_transfer(itransfer);
2000 case LIBUSB_TRANSFER_TYPE_BULK:
2001 case LIBUSB_TRANSFER_TYPE_INTERRUPT:
2002 return submit_bulk_transfer(itransfer);
2003 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
2004 return submit_iso_transfer(itransfer);
2005 case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
2006 #if InterfaceVersion >= 550
2007 return submit_stream_transfer(itransfer);
2009 usbi_err (TRANSFER_CTX(transfer), "IOUSBFamily version does not support bulk stream transfers");
2010 return LIBUSB_ERROR_NOT_SUPPORTED;
2013 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2014 return LIBUSB_ERROR_INVALID_PARAM;
2018 static int cancel_control_transfer(struct usbi_transfer *itransfer) {
2019 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2020 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2023 usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions control pipe");
2026 return LIBUSB_ERROR_NO_DEVICE;
2028 kresult = (*(dpriv->device))->USBDeviceAbortPipeZero (dpriv->device);
2030 return darwin_to_libusb (kresult);
2033 static int darwin_abort_transfers (struct usbi_transfer *itransfer) {
2034 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2035 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2036 struct darwin_interface *cInterface;
2037 uint8_t pipeRef, iface;
2040 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, &iface, &cInterface) != 0) {
2041 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
2043 return LIBUSB_ERROR_NOT_FOUND;
2047 return LIBUSB_ERROR_NO_DEVICE;
2049 usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions on interface %d pipe %d", iface, pipeRef);
2051 /* abort transactions */
2052 #if InterfaceVersion >= 550
2053 if (LIBUSB_TRANSFER_TYPE_BULK_STREAM == transfer->type)
2054 (*(cInterface->interface))->AbortStreamsPipe (cInterface->interface, pipeRef, itransfer->stream_id);
2057 (*(cInterface->interface))->AbortPipe (cInterface->interface, pipeRef);
2059 usbi_dbg ("calling clear pipe stall to clear the data toggle bit");
2061 /* newer versions of darwin support clearing additional bits on the device's endpoint */
2062 kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
2064 return darwin_to_libusb (kresult);
2067 static int darwin_cancel_transfer(struct usbi_transfer *itransfer) {
2068 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2070 switch (transfer->type) {
2071 case LIBUSB_TRANSFER_TYPE_CONTROL:
2072 return cancel_control_transfer(itransfer);
2073 case LIBUSB_TRANSFER_TYPE_BULK:
2074 case LIBUSB_TRANSFER_TYPE_INTERRUPT:
2075 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
2076 return darwin_abort_transfers (itransfer);
2078 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2079 return LIBUSB_ERROR_INVALID_PARAM;
2083 static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0) {
2084 struct usbi_transfer *itransfer = (struct usbi_transfer *)refcon;
2085 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2086 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2088 usbi_dbg ("an async io operation has completed");
2090 /* if requested write a zero packet */
2091 if (kIOReturnSuccess == result && IS_XFEROUT(transfer) && transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
2092 struct darwin_interface *cInterface;
2095 (void) ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface);
2097 (*(cInterface->interface))->WritePipe (cInterface->interface, pipeRef, transfer->buffer, 0);
2100 tpriv->result = result;
2101 tpriv->size = (UInt32) (uintptr_t) arg0;
2103 /* signal the core that this transfer is complete */
2104 usbi_signal_transfer_completion(itransfer);
2107 static enum libusb_transfer_status darwin_transfer_status (struct usbi_transfer *itransfer, IOReturn result) {
2108 if (itransfer->timeout_flags & USBI_TRANSFER_TIMED_OUT)
2109 result = kIOUSBTransactionTimeout;
2112 case kIOReturnUnderrun:
2113 case kIOReturnSuccess:
2114 return LIBUSB_TRANSFER_COMPLETED;
2115 case kIOReturnAborted:
2116 return LIBUSB_TRANSFER_CANCELLED;
2117 case kIOUSBPipeStalled:
2118 usbi_dbg ("transfer error: pipe is stalled");
2119 return LIBUSB_TRANSFER_STALL;
2120 case kIOReturnOverrun:
2121 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: data overrun");
2122 return LIBUSB_TRANSFER_OVERFLOW;
2123 case kIOUSBTransactionTimeout:
2124 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: timed out");
2125 itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT;
2126 return LIBUSB_TRANSFER_TIMED_OUT;
2128 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: %s (value = 0x%08x)", darwin_error_str (result), result);
2129 return LIBUSB_TRANSFER_ERROR;
2133 static int darwin_handle_transfer_completion (struct usbi_transfer *itransfer) {
2134 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2135 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2136 bool isIsoc = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type;
2137 bool isBulk = LIBUSB_TRANSFER_TYPE_BULK == transfer->type;
2138 bool isControl = LIBUSB_TRANSFER_TYPE_CONTROL == transfer->type;
2139 bool isInterrupt = LIBUSB_TRANSFER_TYPE_INTERRUPT == transfer->type;
2142 if (!isIsoc && !isBulk && !isControl && !isInterrupt) {
2143 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2144 return LIBUSB_ERROR_INVALID_PARAM;
2147 usbi_dbg ("handling %s completion with kernel status %d",
2148 isControl ? "control" : isBulk ? "bulk" : isIsoc ? "isoc" : "interrupt", tpriv->result);
2150 if (kIOReturnSuccess == tpriv->result || kIOReturnUnderrun == tpriv->result) {
2151 if (isIsoc && tpriv->isoc_framelist) {
2152 /* copy isochronous results back */
2154 for (i = 0; i < transfer->num_iso_packets ; i++) {
2155 struct libusb_iso_packet_descriptor *lib_desc = &transfer->iso_packet_desc[i];
2156 lib_desc->status = darwin_transfer_status (itransfer, tpriv->isoc_framelist[i].frStatus);
2157 lib_desc->actual_length = tpriv->isoc_framelist[i].frActCount;
2160 itransfer->transferred += tpriv->size;
2163 /* it is ok to handle cancelled transfers without calling usbi_handle_transfer_cancellation (we catch timeout transfers) */
2164 return usbi_handle_transfer_completion (itransfer, darwin_transfer_status (itransfer, tpriv->result));
2167 #if !defined(HAVE_CLOCK_GETTIME)
2168 int usbi_clock_gettime(int clk_id, struct timespec *tp) {
2169 mach_timespec_t sys_time;
2170 clock_serv_t clock_ref;
2173 case USBI_CLOCK_REALTIME:
2174 /* CLOCK_REALTIME represents time since the epoch */
2175 clock_ref = clock_realtime;
2177 case USBI_CLOCK_MONOTONIC:
2178 /* use system boot time as reference for the monotonic clock */
2179 clock_ref = clock_monotonic;
2186 clock_get_time (clock_ref, &sys_time);
2188 tp->tv_sec = sys_time.tv_sec;
2189 tp->tv_nsec = sys_time.tv_nsec;
2195 #if InterfaceVersion >= 550
2196 static int darwin_alloc_streams (struct libusb_device_handle *dev_handle, uint32_t num_streams, unsigned char *endpoints,
2197 int num_endpoints) {
2198 struct darwin_interface *cInterface;
2199 UInt32 supportsStreams;
2203 /* find the mimimum number of supported streams on the endpoint list */
2204 for (i = 0 ; i < num_endpoints ; ++i) {
2205 if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface))) {
2209 (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
2210 if (num_streams > supportsStreams)
2211 num_streams = supportsStreams;
2214 /* it is an error if any endpoint in endpoints does not support streams */
2215 if (0 == num_streams)
2216 return LIBUSB_ERROR_INVALID_PARAM;
2218 /* create the streams */
2219 for (i = 0 ; i < num_endpoints ; ++i) {
2220 (void) ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface);
2222 rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, num_streams);
2223 if (kIOReturnSuccess != rc)
2224 return darwin_to_libusb(rc);
2227 assert(num_streams <= INT_MAX);
2228 return (int)num_streams;
2231 static int darwin_free_streams (struct libusb_device_handle *dev_handle, unsigned char *endpoints, int num_endpoints) {
2232 struct darwin_interface *cInterface;
2233 UInt32 supportsStreams;
2237 for (int i = 0 ; i < num_endpoints ; ++i) {
2238 if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface)))
2241 (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
2242 if (0 == supportsStreams)
2243 return LIBUSB_ERROR_INVALID_PARAM;
2245 rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, 0);
2246 if (kIOReturnSuccess != rc)
2247 return darwin_to_libusb(rc);
2250 return LIBUSB_SUCCESS;
2254 const struct usbi_os_backend usbi_backend = {
2257 .init = darwin_init,
2258 .exit = darwin_exit,
2259 .get_active_config_descriptor = darwin_get_active_config_descriptor,
2260 .get_config_descriptor = darwin_get_config_descriptor,
2261 .hotplug_poll = darwin_hotplug_poll,
2263 .open = darwin_open,
2264 .close = darwin_close,
2265 .get_configuration = darwin_get_configuration,
2266 .set_configuration = darwin_set_configuration,
2267 .claim_interface = darwin_claim_interface,
2268 .release_interface = darwin_release_interface,
2270 .set_interface_altsetting = darwin_set_interface_altsetting,
2271 .clear_halt = darwin_clear_halt,
2272 .reset_device = darwin_reset_device,
2274 #if InterfaceVersion >= 550
2275 .alloc_streams = darwin_alloc_streams,
2276 .free_streams = darwin_free_streams,
2279 .kernel_driver_active = darwin_kernel_driver_active,
2281 .destroy_device = darwin_destroy_device,
2283 .submit_transfer = darwin_submit_transfer,
2284 .cancel_transfer = darwin_cancel_transfer,
2286 .handle_transfer_completion = darwin_handle_transfer_completion,
2288 .device_priv_size = sizeof(struct darwin_device_priv),
2289 .device_handle_priv_size = sizeof(struct darwin_device_handle_priv),
2290 .transfer_priv_size = sizeof(struct darwin_transfer_priv),