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nest-open-source / manifest_repos / libusb / 75f7cd68c64cc37f0bc24a5f1d75dd4d8892da90 / . / libusb / os / darwin_usb.c
blob: c2285cd7cb3e42a55069802f2b85ec5bc10f43cb [file] [log] [blame]
/* -*- Mode: C; indent-tabs-mode:nil -*- */
/*
* darwin backend for libusb 1.0
* Copyright © 2008-2016 Nathan Hjelm <hjelmn@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/sysctl.h>
#include <mach/clock.h>
#include <mach/clock_types.h>
#include <mach/mach_host.h>
#include <mach/mach_port.h>
#include <AvailabilityMacros.h>
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
#include <objc/objc-auto.h>
#endif
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 101200
/* Apple deprecated the darwin atomics in 10.12 in favor of C11 atomics */
#include <stdatomic.h>
#define libusb_darwin_atomic_fetch_add(x, y) atomic_fetch_add(x, y)
_Atomic int32_t initCount = ATOMIC_VAR_INIT(0);
#else
/* use darwin atomics if the target is older than 10.12 */
#include <libkern/OSAtomic.h>
/* OSAtomicAdd32Barrier returns the new value */
#define libusb_darwin_atomic_fetch_add(x, y) (OSAtomicAdd32Barrier(y, x) - y)
static volatile int32_t initCount = 0;
#endif
#include "darwin_usb.h"
/* async event thread */
static pthread_mutex_t libusb_darwin_at_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t libusb_darwin_at_cond = PTHREAD_COND_INITIALIZER;
static pthread_once_t darwin_init_once = PTHREAD_ONCE_INIT;
static clock_serv_t clock_realtime;
static clock_serv_t clock_monotonic;
static CFRunLoopRef libusb_darwin_acfl = NULL; /* event cf loop */
static CFRunLoopSourceRef libusb_darwin_acfls = NULL; /* shutdown signal for event cf loop */
static usbi_mutex_t darwin_cached_devices_lock = PTHREAD_MUTEX_INITIALIZER;
static struct list_head darwin_cached_devices = {&darwin_cached_devices, &darwin_cached_devices};
static char *darwin_device_class = kIOUSBDeviceClassName;
#define DARWIN_CACHED_DEVICE(a) ((struct darwin_cached_device *) (((struct darwin_device_priv *)((a)->os_priv))->dev))
/* async event thread */
static pthread_t libusb_darwin_at;
static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian);
static int darwin_claim_interface(struct libusb_device_handle *dev_handle, int iface);
static int darwin_release_interface(struct libusb_device_handle *dev_handle, int iface);
static int darwin_reset_device(struct libusb_device_handle *dev_handle);
static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0);
static int darwin_scan_devices(struct libusb_context *ctx);
static int process_new_device (struct libusb_context *ctx, io_service_t service);
#if defined(ENABLE_LOGGING)
static const char *darwin_error_str (int result) {
static char string_buffer[50];
switch (result) {
case kIOReturnSuccess:
return "no error";
case kIOReturnNotOpen:
return "device not opened for exclusive access";
case kIOReturnNoDevice:
return "no connection to an IOService";
case kIOUSBNoAsyncPortErr:
return "no async port has been opened for interface";
case kIOReturnExclusiveAccess:
return "another process has device opened for exclusive access";
case kIOUSBPipeStalled:
return "pipe is stalled";
case kIOReturnError:
return "could not establish a connection to the Darwin kernel";
case kIOUSBTransactionTimeout:
return "transaction timed out";
case kIOReturnBadArgument:
return "invalid argument";
case kIOReturnAborted:
return "transaction aborted";
case kIOReturnNotResponding:
return "device not responding";
case kIOReturnOverrun:
return "data overrun";
case kIOReturnCannotWire:
return "physical memory can not be wired down";
case kIOReturnNoResources:
return "out of resources";
case kIOUSBHighSpeedSplitError:
return "high speed split error";
default:
snprintf(string_buffer, sizeof(string_buffer), "unknown error (0x%x)", result);
return string_buffer;
}
}
#endif
static int darwin_to_libusb (int result) {
switch (result) {
case kIOReturnUnderrun:
case kIOReturnSuccess:
return LIBUSB_SUCCESS;
case kIOReturnNotOpen:
case kIOReturnNoDevice:
return LIBUSB_ERROR_NO_DEVICE;
case kIOReturnExclusiveAccess:
return LIBUSB_ERROR_ACCESS;
case kIOUSBPipeStalled:
return LIBUSB_ERROR_PIPE;
case kIOReturnBadArgument:
return LIBUSB_ERROR_INVALID_PARAM;
case kIOUSBTransactionTimeout:
return LIBUSB_ERROR_TIMEOUT;
case kIOReturnNotResponding:
case kIOReturnAborted:
case kIOReturnError:
case kIOUSBNoAsyncPortErr:
default:
return LIBUSB_ERROR_OTHER;
}
}
/* this function must be called with the darwin_cached_devices_lock held */
static void darwin_deref_cached_device(struct darwin_cached_device *cached_dev) {
cached_dev->refcount--;
/* free the device and remove it from the cache */
if (0 == cached_dev->refcount) {
list_del(&cached_dev->list);
(*(cached_dev->device))->Release(cached_dev->device);
free (cached_dev);
}
}
static void darwin_ref_cached_device(struct darwin_cached_device *cached_dev) {
cached_dev->refcount++;
}
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) {
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
/* current interface */
struct darwin_interface *cInterface;
int8_t i, iface;
usbi_dbg ("converting ep address 0x%02x to pipeRef and interface", ep);
for (iface = 0 ; iface < USB_MAXINTERFACES ; iface++) {
cInterface = &priv->interfaces[iface];
if (dev_handle->claimed_interfaces & (1 << iface)) {
for (i = 0 ; i < cInterface->num_endpoints ; i++) {
if (cInterface->endpoint_addrs[i] == ep) {
*pipep = i + 1;
if (ifcp)
*ifcp = iface;
if (interface_out)
*interface_out = cInterface;
usbi_dbg ("pipe %d on interface %d matches", *pipep, iface);
return 0;
}
}
}
}
/* No pipe found with the correct endpoint address */
usbi_warn (HANDLE_CTX(dev_handle), "no pipeRef found with endpoint address 0x%02x.", ep);
return LIBUSB_ERROR_NOT_FOUND;
}
static int usb_setup_device_iterator (io_iterator_t *deviceIterator, UInt32 location) {
CFMutableDictionaryRef matchingDict = IOServiceMatching(darwin_device_class);
if (!matchingDict)
return kIOReturnError;
if (location) {
CFMutableDictionaryRef propertyMatchDict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (propertyMatchDict) {
/* there are no unsigned CFNumber types so treat the value as signed. the os seems to do this
internally (CFNumberType of locationID is 3) */
CFTypeRef locationCF = CFNumberCreate (NULL, kCFNumberSInt32Type, &location);
CFDictionarySetValue (propertyMatchDict, CFSTR(kUSBDevicePropertyLocationID), locationCF);
/* release our reference to the CFNumber (CFDictionarySetValue retains it) */
CFRelease (locationCF);
CFDictionarySetValue (matchingDict, CFSTR(kIOPropertyMatchKey), propertyMatchDict);
/* release out reference to the CFMutableDictionaryRef (CFDictionarySetValue retains it) */
CFRelease (propertyMatchDict);
}
/* else we can still proceed as long as the caller accounts for the possibility of other devices in the iterator */
}
return IOServiceGetMatchingServices(kIOMasterPortDefault, matchingDict, deviceIterator);
}
/* Returns 1 on success, 0 on failure. */
static int get_ioregistry_value_number (io_service_t service, CFStringRef property, CFNumberType type, void *p) {
CFTypeRef cfNumber = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
int ret = 0;
if (cfNumber) {
if (CFGetTypeID(cfNumber) == CFNumberGetTypeID()) {
ret = CFNumberGetValue(cfNumber, type, p);
}
CFRelease (cfNumber);
}
return ret;
}
static int get_ioregistry_value_data (io_service_t service, CFStringRef property, ssize_t size, void *p) {
CFTypeRef cfData = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
int ret = 0;
if (cfData) {
if (CFGetTypeID (cfData) == CFDataGetTypeID ()) {
CFIndex length = CFDataGetLength (cfData);
if (length < size) {
size = length;
}
CFDataGetBytes (cfData, CFRangeMake(0, size), p);
ret = 1;
}
CFRelease (cfData);
}
return ret;
}
static usb_device_t **darwin_device_from_service (io_service_t service)
{
io_cf_plugin_ref_t *plugInInterface = NULL;
usb_device_t **device;
kern_return_t result;
SInt32 score;
result = IOCreatePlugInInterfaceForService(service, kIOUSBDeviceUserClientTypeID,
kIOCFPlugInInterfaceID, &plugInInterface,
&score);
if (kIOReturnSuccess != result || !plugInInterface) {
usbi_dbg ("could not set up plugin for service: %s", darwin_error_str (result));
return NULL;
}
(void)(*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(DeviceInterfaceID),
(LPVOID)&device);
/* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
(*plugInInterface)->Release (plugInInterface);
return device;
}
static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) {
struct libusb_context *ctx;
io_service_t service;
usbi_mutex_lock(&active_contexts_lock);
while ((service = IOIteratorNext(add_devices))) {
/* add this device to each active context's device list */
list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) {
process_new_device (ctx, service);;
}
IOObjectRelease(service);
}
usbi_mutex_unlock(&active_contexts_lock);
}
static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {
struct libusb_device *dev = NULL;
struct libusb_context *ctx;
struct darwin_cached_device *old_device;
io_service_t device;
UInt64 session;
int ret;
usbi_mutex_lock(&active_contexts_lock);
while ((device = IOIteratorNext (rem_devices)) != 0) {
/* get the location from the i/o registry */
ret = get_ioregistry_value_number (device, CFSTR("sessionID"), kCFNumberSInt64Type, &session);
IOObjectRelease (device);
if (!ret)
continue;
/* we need to match darwin_ref_cached_device call made in darwin_get_cached_device function
otherwise no cached device will ever get freed */
usbi_mutex_lock(&darwin_cached_devices_lock);
list_for_each_entry(old_device, &darwin_cached_devices, list, struct darwin_cached_device) {
if (old_device->session == session) {
darwin_deref_cached_device (old_device);
break;
}
}
usbi_mutex_unlock(&darwin_cached_devices_lock);
list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) {
usbi_dbg ("notifying context %p of device disconnect", ctx);
dev = usbi_get_device_by_session_id(ctx, (unsigned long) session);
if (dev) {
/* signal the core that this device has been disconnected. the core will tear down this device
when the reference count reaches 0 */
usbi_disconnect_device(dev);
libusb_unref_device(dev);
}
}
}
usbi_mutex_unlock(&active_contexts_lock);
}
static void darwin_hotplug_poll (void)
{
/* not sure if 5 seconds will be too long/short but it should work ok */
mach_timespec_t timeout = {.tv_sec = 5, .tv_nsec = 0};
/* since a kernel thread may nodify the IOInterators used for
* hotplug notidication we can't just clear the iterators.
* instead just wait until all IOService providers are quiet */
(void) IOKitWaitQuiet (kIOMasterPortDefault, &timeout);
}
static void darwin_clear_iterator (io_iterator_t iter) {
io_service_t device;
while ((device = IOIteratorNext (iter)) != 0)
IOObjectRelease (device);
}
static void *darwin_event_thread_main (void *arg0) {
IOReturn kresult;
struct libusb_context *ctx = (struct libusb_context *)arg0;
CFRunLoopRef runloop;
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
/* Set this thread's name, so it can be seen in the debugger
and crash reports. */
pthread_setname_np ("org.libusb.device-hotplug");
#endif
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
/* Tell the Objective-C garbage collector about this thread.
This is required because, unlike NSThreads, pthreads are
not automatically registered. Although we don't use
Objective-C, we use CoreFoundation, which does.
Garbage collection support was entirely removed in 10.12,
so don't bother there. */
objc_registerThreadWithCollector();
#endif
/* hotplug (device arrival/removal) sources */
CFRunLoopSourceContext libusb_shutdown_cfsourcectx;
CFRunLoopSourceRef libusb_notification_cfsource;
io_notification_port_t libusb_notification_port;
io_iterator_t libusb_rem_device_iterator;
io_iterator_t libusb_add_device_iterator;
usbi_dbg ("creating hotplug event source");
runloop = CFRunLoopGetCurrent ();
CFRetain (runloop);
/* add the shutdown cfsource to the run loop */
memset(&libusb_shutdown_cfsourcectx, 0, sizeof(libusb_shutdown_cfsourcectx));
libusb_shutdown_cfsourcectx.info = runloop;
libusb_shutdown_cfsourcectx.perform = (void (*)(void *))CFRunLoopStop;
libusb_darwin_acfls = CFRunLoopSourceCreate(NULL, 0, &libusb_shutdown_cfsourcectx);
CFRunLoopAddSource(runloop, libusb_darwin_acfls, kCFRunLoopDefaultMode);
/* add the notification port to the run loop */
libusb_notification_port = IONotificationPortCreate (kIOMasterPortDefault);
libusb_notification_cfsource = IONotificationPortGetRunLoopSource (libusb_notification_port);
CFRunLoopAddSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
/* create notifications for removed devices */
kresult = IOServiceAddMatchingNotification (libusb_notification_port, kIOTerminatedNotification,
IOServiceMatching(darwin_device_class),
darwin_devices_detached,
ctx, &libusb_rem_device_iterator);
if (kresult != kIOReturnSuccess) {
usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
pthread_exit (NULL);
}
/* create notifications for attached devices */
kresult = IOServiceAddMatchingNotification(libusb_notification_port, kIOFirstMatchNotification,
IOServiceMatching(darwin_device_class),
darwin_devices_attached,
ctx, &libusb_add_device_iterator);
if (kresult != kIOReturnSuccess) {
usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
pthread_exit (NULL);
}
/* arm notifiers */
darwin_clear_iterator (libusb_rem_device_iterator);
darwin_clear_iterator (libusb_add_device_iterator);
usbi_dbg ("darwin event thread ready to receive events");
/* signal the main thread that the hotplug runloop has been created. */
pthread_mutex_lock (&libusb_darwin_at_mutex);
libusb_darwin_acfl = runloop;
pthread_cond_signal (&libusb_darwin_at_cond);
pthread_mutex_unlock (&libusb_darwin_at_mutex);
/* run the runloop */
CFRunLoopRun();
usbi_dbg ("darwin event thread exiting");
/* remove the notification cfsource */
CFRunLoopRemoveSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
/* remove the shutdown cfsource */
CFRunLoopRemoveSource(runloop, libusb_darwin_acfls, kCFRunLoopDefaultMode);
/* delete notification port */
IONotificationPortDestroy (libusb_notification_port);
/* delete iterators */
IOObjectRelease (libusb_rem_device_iterator);
IOObjectRelease (libusb_add_device_iterator);
CFRelease (libusb_darwin_acfls);
CFRelease (runloop);
libusb_darwin_acfls = NULL;
libusb_darwin_acfl = NULL;
pthread_exit (NULL);
}
/* cleanup function to destroy cached devices */
static void __attribute__((destructor)) _darwin_finalize(void) {
struct darwin_cached_device *dev, *next;
usbi_mutex_lock(&darwin_cached_devices_lock);
list_for_each_entry_safe(dev, next, &darwin_cached_devices, list, struct darwin_cached_device) {
darwin_deref_cached_device(dev);
}
usbi_mutex_unlock(&darwin_cached_devices_lock);
}
static void darwin_check_version (void) {
/* adjust for changes in the USB stack in xnu 15 */
int sysctl_args[] = {CTL_KERN, KERN_OSRELEASE};
long version;
char version_string[256] = {'\0',};
size_t length = 256;
sysctl(sysctl_args, 2, version_string, &length, NULL, 0);
errno = 0;
version = strtol (version_string, NULL, 10);
if (0 == errno && version >= 15) {
darwin_device_class = "IOUSBHostDevice";
}
}
static int darwin_init(struct libusb_context *ctx) {
host_name_port_t host_self;
int rc;
rc = pthread_once (&darwin_init_once, darwin_check_version);
if (rc) {
return LIBUSB_ERROR_OTHER;
}
rc = darwin_scan_devices (ctx);
if (LIBUSB_SUCCESS != rc) {
return rc;
}
if (libusb_darwin_atomic_fetch_add (&initCount, 1) == 0) {
/* create the clocks that will be used */
host_self = mach_host_self();
host_get_clock_service(host_self, CALENDAR_CLOCK, &clock_realtime);
host_get_clock_service(host_self, SYSTEM_CLOCK, &clock_monotonic);
mach_port_deallocate(mach_task_self(), host_self);
pthread_create (&libusb_darwin_at, NULL, darwin_event_thread_main, ctx);
pthread_mutex_lock (&libusb_darwin_at_mutex);
while (!libusb_darwin_acfl)
pthread_cond_wait (&libusb_darwin_at_cond, &libusb_darwin_at_mutex);
pthread_mutex_unlock (&libusb_darwin_at_mutex);
}
return rc;
}
static void darwin_exit (void) {
if (libusb_darwin_atomic_fetch_add (&initCount, -1) == 1) {
mach_port_deallocate(mach_task_self(), clock_realtime);
mach_port_deallocate(mach_task_self(), clock_monotonic);
/* stop the event runloop and wait for the thread to terminate. */
CFRunLoopSourceSignal(libusb_darwin_acfls);
CFRunLoopWakeUp (libusb_darwin_acfl);
pthread_join (libusb_darwin_at, NULL);
}
}
static int darwin_get_device_descriptor(struct libusb_device *dev, unsigned char *buffer, int *host_endian) {
struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
/* return cached copy */
memmove (buffer, &(priv->dev_descriptor), DEVICE_DESC_LENGTH);
*host_endian = 0;
return 0;
}
static int get_configuration_index (struct libusb_device *dev, int config_value) {
struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
UInt8 i, numConfig;
IOUSBConfigurationDescriptorPtr desc;
IOReturn kresult;
/* is there a simpler way to determine the index? */
kresult = (*(priv->device))->GetNumberOfConfigurations (priv->device, &numConfig);
if (kresult != kIOReturnSuccess)
return darwin_to_libusb (kresult);
for (i = 0 ; i < numConfig ; i++) {
(*(priv->device))->GetConfigurationDescriptorPtr (priv->device, i, &desc);
if (desc->bConfigurationValue == config_value)
return i;
}
/* configuration not found */
return LIBUSB_ERROR_NOT_FOUND;
}
static int darwin_get_active_config_descriptor(struct libusb_device *dev, unsigned char *buffer, size_t len, int *host_endian) {
struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
int config_index;
if (0 == priv->active_config)
return LIBUSB_ERROR_NOT_FOUND;
config_index = get_configuration_index (dev, priv->active_config);
if (config_index < 0)
return config_index;
return darwin_get_config_descriptor (dev, config_index, buffer, len, host_endian);
}
static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) {
struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
IOUSBConfigurationDescriptorPtr desc;
IOReturn kresult;
int ret;
if (!priv || !priv->device)
return LIBUSB_ERROR_OTHER;
kresult = (*priv->device)->GetConfigurationDescriptorPtr (priv->device, config_index, &desc);
if (kresult == kIOReturnSuccess) {
/* copy descriptor */
if (libusb_le16_to_cpu(desc->wTotalLength) < len)
len = libusb_le16_to_cpu(desc->wTotalLength);
memmove (buffer, desc, len);
/* GetConfigurationDescriptorPtr returns the descriptor in USB bus order */
*host_endian = 0;
}
ret = darwin_to_libusb (kresult);
if (ret != LIBUSB_SUCCESS)
return ret;
return (int) len;
}
/* check whether the os has configured the device */
static int darwin_check_configuration (struct libusb_context *ctx, struct darwin_cached_device *dev) {
usb_device_t **darwin_device = dev->device;
IOUSBConfigurationDescriptorPtr configDesc;
IOUSBFindInterfaceRequest request;
kern_return_t kresult;
io_iterator_t interface_iterator;
io_service_t firstInterface;
if (dev->dev_descriptor.bNumConfigurations < 1) {
usbi_err (ctx, "device has no configurations");
return LIBUSB_ERROR_OTHER; /* no configurations at this speed so we can't use it */
}
/* checking the configuration of a root hub simulation takes ~1 s in 10.11. the device is
not usable anyway */
if (0x05ac == dev->dev_descriptor.idVendor && 0x8005 == dev->dev_descriptor.idProduct) {
usbi_dbg ("ignoring configuration on root hub simulation");
dev->active_config = 0;
return 0;
}
/* find the first configuration */
kresult = (*darwin_device)->GetConfigurationDescriptorPtr (darwin_device, 0, &configDesc);
dev->first_config = (kIOReturnSuccess == kresult) ? configDesc->bConfigurationValue : 1;
/* check if the device is already configured. there is probably a better way than iterating over the
to accomplish this (the trick is we need to avoid a call to GetConfigurations since buggy devices
might lock up on the device request) */
/* Setup the Interface Request */
request.bInterfaceClass = kIOUSBFindInterfaceDontCare;
request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
request.bAlternateSetting = kIOUSBFindInterfaceDontCare;
kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator);
if (kresult)
return darwin_to_libusb (kresult);
/* iterate once */
firstInterface = IOIteratorNext(interface_iterator);
/* done with the interface iterator */
IOObjectRelease(interface_iterator);
if (firstInterface) {
IOObjectRelease (firstInterface);
/* device is configured */
if (dev->dev_descriptor.bNumConfigurations == 1)
/* to avoid problems with some devices get the configurations value from the configuration descriptor */
dev->active_config = dev->first_config;
else
/* devices with more than one configuration should work with GetConfiguration */
(*darwin_device)->GetConfiguration (darwin_device, &dev->active_config);
} else
/* not configured */
dev->active_config = 0;
usbi_dbg ("active config: %u, first config: %u", dev->active_config, dev->first_config);
return 0;
}
static int darwin_request_descriptor (usb_device_t **device, UInt8 desc, UInt8 desc_index, void *buffer, size_t buffer_size) {
IOUSBDevRequestTO req;
memset (buffer, 0, buffer_size);
/* Set up request for descriptor/ */
req.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBStandard, kUSBDevice);
req.bRequest = kUSBRqGetDescriptor;
req.wValue = desc << 8;
req.wIndex = desc_index;
req.wLength = buffer_size;
req.pData = buffer;
req.noDataTimeout = 20;
req.completionTimeout = 100;
return (*device)->DeviceRequestTO (device, &req);
}
static int darwin_cache_device_descriptor (struct libusb_context *ctx, struct darwin_cached_device *dev) {
usb_device_t **device = dev->device;
int retries = 1, delay = 30000;
int unsuspended = 0, try_unsuspend = 1, try_reconfigure = 1;
int is_open = 0;
int ret = 0, ret2;
UInt8 bDeviceClass;
UInt16 idProduct, idVendor;
dev->can_enumerate = 0;
(*device)->GetDeviceClass (device, &bDeviceClass);
(*device)->GetDeviceProduct (device, &idProduct);
(*device)->GetDeviceVendor (device, &idVendor);
/* According to Apple's documentation the device must be open for DeviceRequest but we may not be able to open some
* devices and Apple's USB Prober doesn't bother to open the device before issuing a descriptor request. Still,
* to follow the spec as closely as possible, try opening the device */
is_open = ((*device)->USBDeviceOpenSeize(device) == kIOReturnSuccess);
do {
/**** retrieve device descriptor ****/
ret = darwin_request_descriptor (device, kUSBDeviceDesc, 0, &dev->dev_descriptor, sizeof(dev->dev_descriptor));
if (kIOReturnOverrun == ret && kUSBDeviceDesc == dev->dev_descriptor.bDescriptorType)
/* received an overrun error but we still received a device descriptor */
ret = kIOReturnSuccess;
if (kIOUSBVendorIDAppleComputer == idVendor) {
/* NTH: don't bother retrying or unsuspending Apple devices */
break;
}
if (kIOReturnSuccess == ret && (0 == dev->dev_descriptor.bNumConfigurations ||
0 == dev->dev_descriptor.bcdUSB)) {
/* work around for incorrectly configured devices */
if (try_reconfigure && is_open) {
usbi_dbg("descriptor appears to be invalid. resetting configuration before trying again...");
/* set the first configuration */
(*device)->SetConfiguration(device, 1);
/* don't try to reconfigure again */
try_reconfigure = 0;
}
ret = kIOUSBPipeStalled;
}
if (kIOReturnSuccess != ret && is_open && try_unsuspend) {
/* device may be suspended. unsuspend it and try again */
#if DeviceVersion >= 320
UInt32 info = 0;
/* IOUSBFamily 320+ provides a way to detect device suspension but earlier versions do not */
(void)(*device)->GetUSBDeviceInformation (device, &info);
/* note that the device was suspended */
if (info & (1 << kUSBInformationDeviceIsSuspendedBit) || 0 == info)
try_unsuspend = 1;
#endif
if (try_unsuspend) {
/* try to unsuspend the device */
ret2 = (*device)->USBDeviceSuspend (device, 0);
if (kIOReturnSuccess != ret2) {
/* prevent log spew from poorly behaving devices. this indicates the
os actually had trouble communicating with the device */
usbi_dbg("could not retrieve device descriptor. failed to unsuspend: %s",darwin_error_str(ret2));
} else
unsuspended = 1;
try_unsuspend = 0;
}
}
if (kIOReturnSuccess != ret) {
usbi_dbg("kernel responded with code: 0x%08x. sleeping for %d ms before trying again", ret, delay/1000);
/* sleep for a little while before trying again */
nanosleep(&(struct timespec){delay / 1000000, (delay * 1000) % 1000000000UL}, NULL);
}
} while (kIOReturnSuccess != ret && retries--);
if (unsuspended)
/* resuspend the device */
(void)(*device)->USBDeviceSuspend (device, 1);
if (is_open)
(void) (*device)->USBDeviceClose (device);
if (ret != kIOReturnSuccess) {
/* a debug message was already printed out for this error */
if (LIBUSB_CLASS_HUB == bDeviceClass)
usbi_dbg ("could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device",
idVendor, idProduct, darwin_error_str (ret), ret);
else
usbi_warn (ctx, "could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device",
idVendor, idProduct, darwin_error_str (ret), ret);
return darwin_to_libusb (ret);
}
/* catch buggy hubs (which appear to be virtual). Apple's own USB prober has problems with these devices. */
if (libusb_le16_to_cpu (dev->dev_descriptor.idProduct) != idProduct) {
/* not a valid device */
usbi_warn (ctx, "idProduct from iokit (%04x) does not match idProduct in descriptor (%04x). skipping device",
idProduct, libusb_le16_to_cpu (dev->dev_descriptor.idProduct));
return LIBUSB_ERROR_NO_DEVICE;
}
usbi_dbg ("cached device descriptor:");
usbi_dbg (" bDescriptorType: 0x%02x", dev->dev_descriptor.bDescriptorType);
usbi_dbg (" bcdUSB: 0x%04x", dev->dev_descriptor.bcdUSB);
usbi_dbg (" bDeviceClass: 0x%02x", dev->dev_descriptor.bDeviceClass);
usbi_dbg (" bDeviceSubClass: 0x%02x", dev->dev_descriptor.bDeviceSubClass);
usbi_dbg (" bDeviceProtocol: 0x%02x", dev->dev_descriptor.bDeviceProtocol);
usbi_dbg (" bMaxPacketSize0: 0x%02x", dev->dev_descriptor.bMaxPacketSize0);
usbi_dbg (" idVendor: 0x%04x", dev->dev_descriptor.idVendor);
usbi_dbg (" idProduct: 0x%04x", dev->dev_descriptor.idProduct);
usbi_dbg (" bcdDevice: 0x%04x", dev->dev_descriptor.bcdDevice);
usbi_dbg (" iManufacturer: 0x%02x", dev->dev_descriptor.iManufacturer);
usbi_dbg (" iProduct: 0x%02x", dev->dev_descriptor.iProduct);
usbi_dbg (" iSerialNumber: 0x%02x", dev->dev_descriptor.iSerialNumber);
usbi_dbg (" bNumConfigurations: 0x%02x", dev->dev_descriptor.bNumConfigurations);
dev->can_enumerate = 1;
return LIBUSB_SUCCESS;
}
static int get_device_port (io_service_t service, UInt8 *port) {
kern_return_t result;
io_service_t parent;
int ret = 0;
if (get_ioregistry_value_number (service, CFSTR("PortNum"), kCFNumberSInt8Type, port)) {
return 1;
}
result = IORegistryEntryGetParentEntry (service, kIOServicePlane, &parent);
if (kIOReturnSuccess == result) {
ret = get_ioregistry_value_data (parent, CFSTR("port"), 1, port);
IOObjectRelease (parent);
}
return ret;
}
static int darwin_get_cached_device(struct libusb_context *ctx, io_service_t service,
struct darwin_cached_device **cached_out) {
struct darwin_cached_device *new_device;
UInt64 sessionID = 0, parent_sessionID = 0;
int ret = LIBUSB_SUCCESS;
usb_device_t **device;
io_service_t parent;
kern_return_t result;
UInt8 port = 0;
/* get some info from the io registry */
(void) get_ioregistry_value_number (service, CFSTR("sessionID"), kCFNumberSInt64Type, &sessionID);
if (!get_device_port (service, &port)) {
usbi_dbg("could not get connected port number");
}
usbi_dbg("finding cached device for sessionID 0x%" PRIx64, sessionID);
result = IORegistryEntryGetParentEntry (service, kIOUSBPlane, &parent);
if (kIOReturnSuccess == result) {
(void) get_ioregistry_value_number (parent, CFSTR("sessionID"), kCFNumberSInt64Type, &parent_sessionID);
IOObjectRelease(parent);
}
usbi_mutex_lock(&darwin_cached_devices_lock);
do {
*cached_out = NULL;
list_for_each_entry(new_device, &darwin_cached_devices, list, struct darwin_cached_device) {
usbi_dbg("matching sessionID 0x%" PRIx64 " against cached device with sessionID 0x%" PRIx64, sessionID, new_device->session);
if (new_device->session == sessionID) {
usbi_dbg("using cached device for device");
*cached_out = new_device;
break;
}
}
if (*cached_out)
break;
usbi_dbg("caching new device with sessionID 0x%" PRIx64, sessionID);
device = darwin_device_from_service (service);
if (!device) {
ret = LIBUSB_ERROR_NO_DEVICE;
break;
}
new_device = calloc (1, sizeof (*new_device));
if (!new_device) {
ret = LIBUSB_ERROR_NO_MEM;
break;
}
/* add this device to the cached device list */
list_add(&new_device->list, &darwin_cached_devices);
(*device)->GetDeviceAddress (device, (USBDeviceAddress *)&new_device->address);
/* keep a reference to this device */
darwin_ref_cached_device(new_device);
new_device->device = device;
new_device->session = sessionID;
(*device)->GetLocationID (device, &new_device->location);
new_device->port = port;
new_device->parent_session = parent_sessionID;
/* cache the device descriptor */
ret = darwin_cache_device_descriptor(ctx, new_device);
if (ret)
break;
if (new_device->can_enumerate) {
snprintf(new_device->sys_path, 20, "%03i-%04x-%04x-%02x-%02x", new_device->address,
new_device->dev_descriptor.idVendor, new_device->dev_descriptor.idProduct,
new_device->dev_descriptor.bDeviceClass, new_device->dev_descriptor.bDeviceSubClass);
}
} while (0);
usbi_mutex_unlock(&darwin_cached_devices_lock);
/* keep track of devices regardless of if we successfully enumerate them to
prevent them from being enumerated multiple times */
*cached_out = new_device;
return ret;
}
static int process_new_device (struct libusb_context *ctx, io_service_t service) {
struct darwin_device_priv *priv;
struct libusb_device *dev = NULL;
struct darwin_cached_device *cached_device;
UInt8 devSpeed;
int ret = 0;
do {
ret = darwin_get_cached_device (ctx, service, &cached_device);
if (ret < 0 || !cached_device->can_enumerate) {
return ret;
}
/* check current active configuration (and cache the first configuration value--
which may be used by claim_interface) */
ret = darwin_check_configuration (ctx, cached_device);
if (ret)
break;
usbi_dbg ("allocating new device in context %p for with session 0x%" PRIx64,
ctx, cached_device->session);
dev = usbi_alloc_device(ctx, (unsigned long) cached_device->session);
if (!dev) {
return LIBUSB_ERROR_NO_MEM;
}
priv = (struct darwin_device_priv *)dev->os_priv;
priv->dev = cached_device;
darwin_ref_cached_device (priv->dev);
if (cached_device->parent_session > 0) {
dev->parent_dev = usbi_get_device_by_session_id (ctx, (unsigned long) cached_device->parent_session);
} else {
dev->parent_dev = NULL;
}
dev->port_number = cached_device->port;
dev->bus_number = cached_device->location >> 24;
dev->device_address = cached_device->address;
(*(priv->dev->device))->GetDeviceSpeed (priv->dev->device, &devSpeed);
switch (devSpeed) {
case kUSBDeviceSpeedLow: dev->speed = LIBUSB_SPEED_LOW; break;
case kUSBDeviceSpeedFull: dev->speed = LIBUSB_SPEED_FULL; break;
case kUSBDeviceSpeedHigh: dev->speed = LIBUSB_SPEED_HIGH; break;
#if DeviceVersion >= 500
case kUSBDeviceSpeedSuper: dev->speed = LIBUSB_SPEED_SUPER; break;
#endif
default:
usbi_warn (ctx, "Got unknown device speed %d", devSpeed);
}
ret = usbi_sanitize_device (dev);
if (ret < 0)
break;
usbi_dbg ("found device with address %d port = %d parent = %p at %p", dev->device_address,
dev->port_number, (void *) dev->parent_dev, priv->dev->sys_path);
} while (0);
if (0 == ret) {
usbi_connect_device (dev);
} else {
libusb_unref_device (dev);
}
return ret;
}
static int darwin_scan_devices(struct libusb_context *ctx) {
io_iterator_t deviceIterator;
io_service_t service;
kern_return_t kresult;
kresult = usb_setup_device_iterator (&deviceIterator, 0);
if (kresult != kIOReturnSuccess)
return darwin_to_libusb (kresult);
while ((service = IOIteratorNext (deviceIterator))) {
(void) process_new_device (ctx, service);
IOObjectRelease(service);
}
IOObjectRelease(deviceIterator);
return 0;
}
static int darwin_open (struct libusb_device_handle *dev_handle) {
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
IOReturn kresult;
if (0 == dpriv->open_count) {
/* try to open the device */
kresult = (*(dpriv->device))->USBDeviceOpenSeize (dpriv->device);
if (kresult != kIOReturnSuccess) {
usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceOpen: %s", darwin_error_str(kresult));
if (kIOReturnExclusiveAccess != kresult) {
return darwin_to_libusb (kresult);
}
/* it is possible to perform some actions on a device that is not open so do not return an error */
priv->is_open = 0;
} else {
priv->is_open = 1;
}
/* create async event source */
kresult = (*(dpriv->device))->CreateDeviceAsyncEventSource (dpriv->device, &priv->cfSource);
if (kresult != kIOReturnSuccess) {
usbi_err (HANDLE_CTX (dev_handle), "CreateDeviceAsyncEventSource: %s", darwin_error_str(kresult));
if (priv->is_open) {
(*(dpriv->device))->USBDeviceClose (dpriv->device);
}
priv->is_open = 0;
return darwin_to_libusb (kresult);
}
CFRetain (libusb_darwin_acfl);
/* add the cfSource to the aync run loop */
CFRunLoopAddSource(libusb_darwin_acfl, priv->cfSource, kCFRunLoopCommonModes);
}
/* device opened successfully */
dpriv->open_count++;
usbi_dbg ("device open for access");
return 0;
}
static void darwin_close (struct libusb_device_handle *dev_handle) {
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
IOReturn kresult;
int i;
if (dpriv->open_count == 0) {
/* something is probably very wrong if this is the case */
usbi_err (HANDLE_CTX (dev_handle), "Close called on a device that was not open!");
return;
}
dpriv->open_count--;
/* make sure all interfaces are released */
for (i = 0 ; i < USB_MAXINTERFACES ; i++)
if (dev_handle->claimed_interfaces & (1 << i))
libusb_release_interface (dev_handle, i);
if (0 == dpriv->open_count) {
/* delete the device's async event source */
if (priv->cfSource) {
CFRunLoopRemoveSource (libusb_darwin_acfl, priv->cfSource, kCFRunLoopDefaultMode);
CFRelease (priv->cfSource);
priv->cfSource = NULL;
CFRelease (libusb_darwin_acfl);
}
if (priv->is_open) {
/* close the device */
kresult = (*(dpriv->device))->USBDeviceClose(dpriv->device);
if (kresult) {
/* Log the fact that we had a problem closing the file, however failing a
* close isn't really an error, so return success anyway */
usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceClose: %s", darwin_error_str(kresult));
}
}
}
}
static int darwin_get_configuration(struct libusb_device_handle *dev_handle, int *config) {
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
*config = (int) dpriv->active_config;
return 0;
}
static int darwin_set_configuration(struct libusb_device_handle *dev_handle, int config) {
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
IOReturn kresult;
int i;
/* Setting configuration will invalidate the interface, so we need
to reclaim it. First, dispose of existing interfaces, if any. */
for (i = 0 ; i < USB_MAXINTERFACES ; i++)
if (dev_handle->claimed_interfaces & (1 << i))
darwin_release_interface (dev_handle, i);
kresult = (*(dpriv->device))->SetConfiguration (dpriv->device, config);
if (kresult != kIOReturnSuccess)
return darwin_to_libusb (kresult);
/* Reclaim any interfaces. */
for (i = 0 ; i < USB_MAXINTERFACES ; i++)
if (dev_handle->claimed_interfaces & (1 << i))
darwin_claim_interface (dev_handle, i);
dpriv->active_config = config;
return 0;
}
static int darwin_get_interface (usb_device_t **darwin_device, uint8_t ifc, io_service_t *usbInterfacep) {
IOUSBFindInterfaceRequest request;
kern_return_t kresult;
io_iterator_t interface_iterator;
UInt8 bInterfaceNumber;
int ret;
*usbInterfacep = IO_OBJECT_NULL;
/* Setup the Interface Request */
request.bInterfaceClass = kIOUSBFindInterfaceDontCare;
request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
request.bAlternateSetting = kIOUSBFindInterfaceDontCare;
kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator);
if (kresult)
return kresult;
while ((*usbInterfacep = IOIteratorNext(interface_iterator))) {
/* find the interface number */
ret = get_ioregistry_value_number (*usbInterfacep, CFSTR("bInterfaceNumber"), kCFNumberSInt8Type,
&bInterfaceNumber);
if (ret && bInterfaceNumber == ifc) {
break;
}
(void) IOObjectRelease (*usbInterfacep);
}
/* done with the interface iterator */
IOObjectRelease(interface_iterator);
return 0;
}
static int get_endpoints (struct libusb_device_handle *dev_handle, int iface) {
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
/* current interface */
struct darwin_interface *cInterface = &priv->interfaces[iface];
kern_return_t kresult;
u_int8_t numep, direction, number;
u_int8_t dont_care1, dont_care3;
u_int16_t dont_care2;
int rc;
usbi_dbg ("building table of endpoints.");
/* retrieve the total number of endpoints on this interface */
kresult = (*(cInterface->interface))->GetNumEndpoints(cInterface->interface, &numep);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "can't get number of endpoints for interface: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
/* iterate through pipe references */
for (int i = 1 ; i <= numep ; i++) {
kresult = (*(cInterface->interface))->GetPipeProperties(cInterface->interface, i, &direction, &number, &dont_care1,
&dont_care2, &dont_care3);
if (kresult != kIOReturnSuccess) {
/* probably a buggy device. try to get the endpoint address from the descriptors */
struct libusb_config_descriptor *config;
const struct libusb_endpoint_descriptor *endpoint_desc;
UInt8 alt_setting;
kresult = (*(cInterface->interface))->GetAlternateSetting (cInterface->interface, &alt_setting);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "can't get alternate setting for interface");
return darwin_to_libusb (kresult);
}
rc = libusb_get_active_config_descriptor (dev_handle->dev, &config);
if (LIBUSB_SUCCESS != rc) {
return rc;
}
endpoint_desc = config->interface[iface].altsetting[alt_setting].endpoint + i - 1;
cInterface->endpoint_addrs[i - 1] = endpoint_desc->bEndpointAddress;
} else {
cInterface->endpoint_addrs[i - 1] = (((kUSBIn == direction) << kUSBRqDirnShift) | (number & LIBUSB_ENDPOINT_ADDRESS_MASK));
}
usbi_dbg ("interface: %i pipe %i: dir: %i number: %i", iface, i, cInterface->endpoint_addrs[i - 1] >> kUSBRqDirnShift,
cInterface->endpoint_addrs[i - 1] & LIBUSB_ENDPOINT_ADDRESS_MASK);
}
cInterface->num_endpoints = numep;
return 0;
}
static int darwin_claim_interface(struct libusb_device_handle *dev_handle, int iface) {
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
io_service_t usbInterface = IO_OBJECT_NULL;
IOReturn kresult;
IOCFPlugInInterface **plugInInterface = NULL;
SInt32 score;
/* current interface */
struct darwin_interface *cInterface = &priv->interfaces[iface];
kresult = darwin_get_interface (dpriv->device, iface, &usbInterface);
if (kresult != kIOReturnSuccess)
return darwin_to_libusb (kresult);
/* make sure we have an interface */
if (!usbInterface && dpriv->first_config != 0) {
usbi_info (HANDLE_CTX (dev_handle), "no interface found; setting configuration: %d", dpriv->first_config);
/* set the configuration */
kresult = darwin_set_configuration (dev_handle, dpriv->first_config);
if (kresult != LIBUSB_SUCCESS) {
usbi_err (HANDLE_CTX (dev_handle), "could not set configuration");
return kresult;
}
kresult = darwin_get_interface (dpriv->device, iface, &usbInterface);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
}
if (!usbInterface) {
usbi_err (HANDLE_CTX (dev_handle), "interface not found");
return LIBUSB_ERROR_NOT_FOUND;
}
/* get an interface to the device's interface */
kresult = IOCreatePlugInInterfaceForService (usbInterface, kIOUSBInterfaceUserClientTypeID,
kIOCFPlugInInterfaceID, &plugInInterface, &score);
/* ignore release error */
(void)IOObjectRelease (usbInterface);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "IOCreatePlugInInterfaceForService: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
if (!plugInInterface) {
usbi_err (HANDLE_CTX (dev_handle), "plugin interface not found");
return LIBUSB_ERROR_NOT_FOUND;
}
/* Do the actual claim */
kresult = (*plugInInterface)->QueryInterface(plugInInterface,
CFUUIDGetUUIDBytes(kIOUSBInterfaceInterfaceID),
(LPVOID)&cInterface->interface);
/* We no longer need the intermediate plug-in */
/* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
(*plugInInterface)->Release (plugInInterface);
if (kresult || !cInterface->interface) {
usbi_err (HANDLE_CTX (dev_handle), "QueryInterface: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
/* claim the interface */
kresult = (*(cInterface->interface))->USBInterfaceOpen(cInterface->interface);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "USBInterfaceOpen: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
/* update list of endpoints */
kresult = get_endpoints (dev_handle, iface);
if (kresult) {
/* this should not happen */
darwin_release_interface (dev_handle, iface);
usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table");
return kresult;
}
cInterface->cfSource = NULL;
/* create async event source */
kresult = (*(cInterface->interface))->CreateInterfaceAsyncEventSource (cInterface->interface, &cInterface->cfSource);
if (kresult != kIOReturnSuccess) {
usbi_err (HANDLE_CTX (dev_handle), "could not create async event source");
/* can't continue without an async event source */
(void)darwin_release_interface (dev_handle, iface);
return darwin_to_libusb (kresult);
}
/* add the cfSource to the async thread's run loop */
CFRunLoopAddSource(libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
usbi_dbg ("interface opened");
return 0;
}
static int darwin_release_interface(struct libusb_device_handle *dev_handle, int iface) {
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
IOReturn kresult;
/* current interface */
struct darwin_interface *cInterface = &priv->interfaces[iface];
/* Check to see if an interface is open */
if (!cInterface->interface)
return LIBUSB_SUCCESS;
/* clean up endpoint data */
cInterface->num_endpoints = 0;
/* delete the interface's async event source */
if (cInterface->cfSource) {
CFRunLoopRemoveSource (libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
CFRelease (cInterface->cfSource);
}
kresult = (*(cInterface->interface))->USBInterfaceClose(cInterface->interface);
if (kresult)
usbi_warn (HANDLE_CTX (dev_handle), "USBInterfaceClose: %s", darwin_error_str(kresult));
kresult = (*(cInterface->interface))->Release(cInterface->interface);
if (kresult != kIOReturnSuccess)
usbi_warn (HANDLE_CTX (dev_handle), "Release: %s", darwin_error_str(kresult));
cInterface->interface = (usb_interface_t **) IO_OBJECT_NULL;
return darwin_to_libusb (kresult);
}
static int darwin_set_interface_altsetting(struct libusb_device_handle *dev_handle, int iface, int altsetting) {
struct darwin_device_handle_priv *priv = (struct darwin_device_handle_priv *)dev_handle->os_priv;
IOReturn kresult;
/* current interface */
struct darwin_interface *cInterface = &priv->interfaces[iface];
if (!cInterface->interface)
return LIBUSB_ERROR_NO_DEVICE;
kresult = (*(cInterface->interface))->SetAlternateInterface (cInterface->interface, altsetting);
if (kresult != kIOReturnSuccess)
darwin_reset_device (dev_handle);
/* update list of endpoints */
kresult = get_endpoints (dev_handle, iface);
if (kresult) {
/* this should not happen */
darwin_release_interface (dev_handle, iface);
usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table");
return kresult;
}
return darwin_to_libusb (kresult);
}
static int darwin_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) {
/* current interface */
struct darwin_interface *cInterface;
IOReturn kresult;
uint8_t pipeRef;
/* determine the interface/endpoint to use */
if (ep_to_pipeRef (dev_handle, endpoint, &pipeRef, NULL, &cInterface) != 0) {
usbi_err (HANDLE_CTX (dev_handle), "endpoint not found on any open interface");
return LIBUSB_ERROR_NOT_FOUND;
}
/* newer versions of darwin support clearing additional bits on the device's endpoint */
kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
if (kresult)
usbi_warn (HANDLE_CTX (dev_handle), "ClearPipeStall: %s", darwin_error_str (kresult));
return darwin_to_libusb (kresult);
}
static int darwin_reset_device(struct libusb_device_handle *dev_handle) {
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
IOUSBDeviceDescriptor descriptor;
IOUSBConfigurationDescriptorPtr cached_configuration;
IOUSBConfigurationDescriptor configuration;
bool reenumerate = false;
IOReturn kresult;
int i;
kresult = (*(dpriv->device))->ResetDevice (dpriv->device);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "ResetDevice: %s", darwin_error_str (kresult));
return darwin_to_libusb (kresult);
}
do {
usbi_dbg ("darwin/reset_device: checking if device descriptor changed");
/* ignore return code. if we can't get a descriptor it might be worthwhile re-enumerating anway */
(void) darwin_request_descriptor (dpriv->device, kUSBDeviceDesc, 0, &descriptor, sizeof (descriptor));
/* check if the device descriptor has changed */
if (0 != memcmp (&dpriv->dev_descriptor, &descriptor, sizeof (descriptor))) {
reenumerate = true;
break;
}
/* check if any configuration descriptor has changed */
for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
usbi_dbg ("darwin/reset_device: checking if configuration descriptor %d changed", i);
(void) darwin_request_descriptor (dpriv->device, kUSBConfDesc, i, &configuration, sizeof (configuration));
(*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
if (!cached_configuration || 0 != memcmp (cached_configuration, &configuration, sizeof (configuration))) {
reenumerate = true;
break;
}
}
} while (0);
if (reenumerate) {
usbi_dbg ("darwin/reset_device: device requires reenumeration");
(void) (*(dpriv->device))->USBDeviceReEnumerate (dpriv->device, 0);
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg ("darwin/reset_device: device reset complete");
return LIBUSB_SUCCESS;
}
static int darwin_kernel_driver_active(struct libusb_device_handle *dev_handle, int interface) {
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
io_service_t usbInterface;
CFTypeRef driver;
IOReturn kresult;
kresult = darwin_get_interface (dpriv->device, interface, &usbInterface);
if (kresult) {
usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
driver = IORegistryEntryCreateCFProperty (usbInterface, kIOBundleIdentifierKey, kCFAllocatorDefault, 0);
IOObjectRelease (usbInterface);
if (driver) {
CFRelease (driver);
return 1;
}
/* no driver */
return 0;
}
/* attaching/detaching kernel drivers is not currently supported (maybe in the future?) */
static int darwin_attach_kernel_driver (struct libusb_device_handle *dev_handle, int interface) {
UNUSED(dev_handle);
UNUSED(interface);
return LIBUSB_ERROR_NOT_SUPPORTED;
}
static int darwin_detach_kernel_driver (struct libusb_device_handle *dev_handle, int interface) {
UNUSED(dev_handle);
UNUSED(interface);
return LIBUSB_ERROR_NOT_SUPPORTED;
}
static void darwin_destroy_device(struct libusb_device *dev) {
struct darwin_device_priv *dpriv = (struct darwin_device_priv *) dev->os_priv;
if (dpriv->dev) {
/* need to hold the lock in case this is the last reference to the device */
usbi_mutex_lock(&darwin_cached_devices_lock);
darwin_deref_cached_device (dpriv->dev);
dpriv->dev = NULL;
usbi_mutex_unlock(&darwin_cached_devices_lock);
}
}
static int submit_bulk_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
IOReturn ret;
uint8_t transferType;
/* None of the values below are used in libusbx for bulk transfers */
uint8_t direction, number, interval, pipeRef;
uint16_t maxPacketSize;
struct darwin_interface *cInterface;
if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
return LIBUSB_ERROR_NOT_FOUND;
}
ret = (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
&transferType, &maxPacketSize, &interval);
if (ret) {
usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
darwin_error_str(ret), ret);
return darwin_to_libusb (ret);
}
if (0 != (transfer->length % maxPacketSize)) {
/* do not need a zero packet */
transfer->flags &= ~LIBUSB_TRANSFER_ADD_ZERO_PACKET;
}
/* submit the request */
/* timeouts are unavailable on interrupt endpoints */
if (transferType == kUSBInterrupt) {
if (IS_XFERIN(transfer))
ret = (*(cInterface->interface))->ReadPipeAsync(cInterface->interface, pipeRef, transfer->buffer,
transfer->length, darwin_async_io_callback, itransfer);
else
ret = (*(cInterface->interface))->WritePipeAsync(cInterface->interface, pipeRef, transfer->buffer,
transfer->length, darwin_async_io_callback, itransfer);
} else {
itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
if (IS_XFERIN(transfer))
ret = (*(cInterface->interface))->ReadPipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
transfer->length, transfer->timeout, transfer->timeout,
darwin_async_io_callback, (void *)itransfer);
else
ret = (*(cInterface->interface))->WritePipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
transfer->length, transfer->timeout, transfer->timeout,
darwin_async_io_callback, (void *)itransfer);
}
if (ret)
usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
darwin_error_str(ret), ret);
return darwin_to_libusb (ret);
}
#if InterfaceVersion >= 550
static int submit_stream_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_interface *cInterface;
uint8_t pipeRef;
IOReturn ret;
if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
return LIBUSB_ERROR_NOT_FOUND;
}
itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
if (IS_XFERIN(transfer))
ret = (*(cInterface->interface))->ReadStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
transfer->buffer, transfer->length, transfer->timeout,
transfer->timeout, darwin_async_io_callback, (void *)itransfer);
else
ret = (*(cInterface->interface))->WriteStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
transfer->buffer, transfer->length, transfer->timeout,
transfer->timeout, darwin_async_io_callback, (void *)itransfer);
if (ret)
usbi_err (TRANSFER_CTX (transfer), "bulk stream transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
darwin_error_str(ret), ret);
return darwin_to_libusb (ret);
}
#endif
static int submit_iso_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer);
IOReturn kresult;
uint8_t direction, number, interval, pipeRef, transferType;
uint16_t maxPacketSize;
UInt64 frame;
AbsoluteTime atTime;
int i;
struct darwin_interface *cInterface;
/* construct an array of IOUSBIsocFrames, reuse the old one if possible */
if (tpriv->isoc_framelist && tpriv->num_iso_packets != transfer->num_iso_packets) {
free(tpriv->isoc_framelist);
tpriv->isoc_framelist = NULL;
}
if (!tpriv->isoc_framelist) {
tpriv->num_iso_packets = transfer->num_iso_packets;
tpriv->isoc_framelist = (IOUSBIsocFrame*) calloc (transfer->num_iso_packets, sizeof(IOUSBIsocFrame));
if (!tpriv->isoc_framelist)
return LIBUSB_ERROR_NO_MEM;
}
/* copy the frame list from the libusb descriptor (the structures differ only is member order) */
for (i = 0 ; i < transfer->num_iso_packets ; i++)
tpriv->isoc_framelist[i].frReqCount = transfer->iso_packet_desc[i].length;
/* determine the interface/endpoint to use */
if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
return LIBUSB_ERROR_NOT_FOUND;
}
/* determine the properties of this endpoint and the speed of the device */
(*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
&transferType, &maxPacketSize, &interval);
/* Last but not least we need the bus frame number */
kresult = (*(cInterface->interface))->GetBusFrameNumber(cInterface->interface, &frame, &atTime);
if (kresult) {
usbi_err (TRANSFER_CTX (transfer), "failed to get bus frame number: %d", kresult);
free(tpriv->isoc_framelist);
tpriv->isoc_framelist = NULL;
return darwin_to_libusb (kresult);
}
(*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
&transferType, &maxPacketSize, &interval);
/* schedule for a frame a little in the future */
frame += 4;
if (cInterface->frames[transfer->endpoint] && frame < cInterface->frames[transfer->endpoint])
frame = cInterface->frames[transfer->endpoint];
/* submit the request */
if (IS_XFERIN(transfer))
kresult = (*(cInterface->interface))->ReadIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
itransfer);
else
kresult = (*(cInterface->interface))->WriteIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
itransfer);
if (LIBUSB_SPEED_FULL == transfer->dev_handle->dev->speed)
/* Full speed */
cInterface->frames[transfer->endpoint] = frame + transfer->num_iso_packets * (1 << (interval - 1));
else
/* High/super speed */
cInterface->frames[transfer->endpoint] = frame + transfer->num_iso_packets * (1 << (interval - 1)) / 8;
if (kresult != kIOReturnSuccess) {
usbi_err (TRANSFER_CTX (transfer), "isochronous transfer failed (dir: %s): %s", IS_XFERIN(transfer) ? "In" : "Out",
darwin_error_str(kresult));
free (tpriv->isoc_framelist);
tpriv->isoc_framelist = NULL;
}
return darwin_to_libusb (kresult);
}
static int submit_control_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_control_setup *setup = (struct libusb_control_setup *) transfer->buffer;
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer);
IOReturn kresult;
bzero(&tpriv->req, sizeof(tpriv->req));
/* IOUSBDeviceInterface expects the request in cpu endianness */
tpriv->req.bmRequestType = setup->bmRequestType;
tpriv->req.bRequest = setup->bRequest;
/* these values should be in bus order from libusb_fill_control_setup */
tpriv->req.wValue = OSSwapLittleToHostInt16 (setup->wValue);
tpriv->req.wIndex = OSSwapLittleToHostInt16 (setup->wIndex);
tpriv->req.wLength = OSSwapLittleToHostInt16 (setup->wLength);
/* data is stored after the libusb control block */
tpriv->req.pData = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
tpriv->req.completionTimeout = transfer->timeout;
tpriv->req.noDataTimeout = transfer->timeout;
itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
/* all transfers in libusb-1.0 are async */
if (transfer->endpoint) {
struct darwin_interface *cInterface;
uint8_t pipeRef;
if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
return LIBUSB_ERROR_NOT_FOUND;
}
kresult = (*(cInterface->interface))->ControlRequestAsyncTO (cInterface->interface, pipeRef, &(tpriv->req), darwin_async_io_callback, itransfer);
} else
/* control request on endpoint 0 */
kresult = (*(dpriv->device))->DeviceRequestAsyncTO(dpriv->device, &(tpriv->req), darwin_async_io_callback, itransfer);
if (kresult != kIOReturnSuccess)
usbi_err (TRANSFER_CTX (transfer), "control request failed: %s", darwin_error_str(kresult));
return darwin_to_libusb (kresult);
}
static int darwin_submit_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
switch (transfer->type) {
case LIBUSB_TRANSFER_TYPE_CONTROL:
return submit_control_transfer(itransfer);
case LIBUSB_TRANSFER_TYPE_BULK:
case LIBUSB_TRANSFER_TYPE_INTERRUPT:
return submit_bulk_transfer(itransfer);
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
return submit_iso_transfer(itransfer);
case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
#if InterfaceVersion >= 550
return submit_stream_transfer(itransfer);
#else
usbi_err (TRANSFER_CTX(transfer), "IOUSBFamily version does not support bulk stream transfers");
return LIBUSB_ERROR_NOT_SUPPORTED;
#endif
default:
usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
return LIBUSB_ERROR_INVALID_PARAM;
}
}
static int cancel_control_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
IOReturn kresult;
usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions control pipe");
if (!dpriv->device)
return LIBUSB_ERROR_NO_DEVICE;
kresult = (*(dpriv->device))->USBDeviceAbortPipeZero (dpriv->device);
return darwin_to_libusb (kresult);
}
static int darwin_abort_transfers (struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
struct darwin_interface *cInterface;
uint8_t pipeRef, iface;
IOReturn kresult;
if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, &iface, &cInterface) != 0) {
usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
return LIBUSB_ERROR_NOT_FOUND;
}
if (!dpriv->device)
return LIBUSB_ERROR_NO_DEVICE;
usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions on interface %d pipe %d", iface, pipeRef);
/* abort transactions */
#if InterfaceVersion >= 550
if (LIBUSB_TRANSFER_TYPE_BULK_STREAM == transfer->type)
(*(cInterface->interface))->AbortStreamsPipe (cInterface->interface, pipeRef, itransfer->stream_id);
else
#endif
(*(cInterface->interface))->AbortPipe (cInterface->interface, pipeRef);
usbi_dbg ("calling clear pipe stall to clear the data toggle bit");
/* newer versions of darwin support clearing additional bits on the device's endpoint */
kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
return darwin_to_libusb (kresult);
}
static int darwin_cancel_transfer(struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
switch (transfer->type) {
case LIBUSB_TRANSFER_TYPE_CONTROL:
return cancel_control_transfer(itransfer);
case LIBUSB_TRANSFER_TYPE_BULK:
case LIBUSB_TRANSFER_TYPE_INTERRUPT:
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
return darwin_abort_transfers (itransfer);
default:
usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
return LIBUSB_ERROR_INVALID_PARAM;
}
}
static void darwin_clear_transfer_priv (struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer);
if (transfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS && tpriv->isoc_framelist) {
free (tpriv->isoc_framelist);
tpriv->isoc_framelist = NULL;
}
}
static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0) {
struct usbi_transfer *itransfer = (struct usbi_transfer *)refcon;
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer);
usbi_dbg ("an async io operation has completed");
/* if requested write a zero packet */
if (kIOReturnSuccess == result && IS_XFEROUT(transfer) && transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
struct darwin_interface *cInterface;
uint8_t pipeRef;
(void) ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface);
(*(cInterface->interface))->WritePipe (cInterface->interface, pipeRef, transfer->buffer, 0);
}
tpriv->result = result;
tpriv->size = (UInt32) (uintptr_t) arg0;
/* signal the core that this transfer is complete */
usbi_signal_transfer_completion(itransfer);
}
static int darwin_transfer_status (struct usbi_transfer *itransfer, kern_return_t result) {
if (itransfer->timeout_flags & USBI_TRANSFER_TIMED_OUT)
result = kIOUSBTransactionTimeout;
switch (result) {
case kIOReturnUnderrun:
case kIOReturnSuccess:
return LIBUSB_TRANSFER_COMPLETED;
case kIOReturnAborted:
return LIBUSB_TRANSFER_CANCELLED;
case kIOUSBPipeStalled:
usbi_dbg ("transfer error: pipe is stalled");
return LIBUSB_TRANSFER_STALL;
case kIOReturnOverrun:
usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: data overrun");
return LIBUSB_TRANSFER_OVERFLOW;
case kIOUSBTransactionTimeout:
usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: timed out");
itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT;
return LIBUSB_TRANSFER_TIMED_OUT;
default:
usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: %s (value = 0x%08x)", darwin_error_str (result), result);
return LIBUSB_TRANSFER_ERROR;
}
}
static int darwin_handle_transfer_completion (struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct darwin_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer);
int isIsoc = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type;
int isBulk = LIBUSB_TRANSFER_TYPE_BULK == transfer->type;
int isControl = LIBUSB_TRANSFER_TYPE_CONTROL == transfer->type;
int isInterrupt = LIBUSB_TRANSFER_TYPE_INTERRUPT == transfer->type;
int i;
if (!isIsoc && !isBulk && !isControl && !isInterrupt) {
usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
return LIBUSB_ERROR_INVALID_PARAM;
}
usbi_dbg ("handling %s completion with kernel status %d",
isControl ? "control" : isBulk ? "bulk" : isIsoc ? "isoc" : "interrupt", tpriv->result);
if (kIOReturnSuccess == tpriv->result || kIOReturnUnderrun == tpriv->result) {
if (isIsoc && tpriv->isoc_framelist) {
/* copy isochronous results back */
for (i = 0; i < transfer->num_iso_packets ; i++) {
struct libusb_iso_packet_descriptor *lib_desc = &transfer->iso_packet_desc[i];
lib_desc->status = darwin_to_libusb (tpriv->isoc_framelist[i].frStatus);
lib_desc->actual_length = tpriv->isoc_framelist[i].frActCount;
}
} else if (!isIsoc)
itransfer->transferred += tpriv->size;
}
/* it is ok to handle cancelled transfers without calling usbi_handle_transfer_cancellation (we catch timeout transfers) */
return usbi_handle_transfer_completion (itransfer, darwin_transfer_status (itransfer, tpriv->result));
}
static int darwin_clock_gettime(int clk_id, struct timespec *tp) {
mach_timespec_t sys_time;
clock_serv_t clock_ref;
switch (clk_id) {
case USBI_CLOCK_REALTIME:
/* CLOCK_REALTIME represents time since the epoch */
clock_ref = clock_realtime;
break;
case USBI_CLOCK_MONOTONIC:
/* use system boot time as reference for the monotonic clock */
clock_ref = clock_monotonic;
break;
default:
return LIBUSB_ERROR_INVALID_PARAM;
}
clock_get_time (clock_ref, &sys_time);
tp->tv_sec = sys_time.tv_sec;
tp->tv_nsec = sys_time.tv_nsec;
return 0;
}
#if InterfaceVersion >= 550
static int darwin_alloc_streams (struct libusb_device_handle *dev_handle, uint32_t num_streams, unsigned char *endpoints,
int num_endpoints) {
struct darwin_interface *cInterface;
UInt32 supportsStreams;
uint8_t pipeRef;
int rc, i;
/* find the mimimum number of supported streams on the endpoint list */
for (i = 0 ; i < num_endpoints ; ++i) {
if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface))) {
return rc;
}
(*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
if (num_streams > supportsStreams)
num_streams = supportsStreams;
}
/* it is an error if any endpoint in endpoints does not support streams */
if (0 == num_streams)
return LIBUSB_ERROR_INVALID_PARAM;
/* create the streams */
for (i = 0 ; i < num_endpoints ; ++i) {
(void) ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface);
rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, num_streams);
if (kIOReturnSuccess != rc)
return darwin_to_libusb(rc);
}
return num_streams;
}
static int darwin_free_streams (struct libusb_device_handle *dev_handle, unsigned char *endpoints, int num_endpoints) {
struct darwin_interface *cInterface;
UInt32 supportsStreams;
uint8_t pipeRef;
int rc;
for (int i = 0 ; i < num_endpoints ; ++i) {
if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface)))
return rc;
(*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
if (0 == supportsStreams)
return LIBUSB_ERROR_INVALID_PARAM;
rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, 0);
if (kIOReturnSuccess != rc)
return darwin_to_libusb(rc);
}
return LIBUSB_SUCCESS;
}
#endif
const struct usbi_os_backend darwin_backend = {
.name = "Darwin",
.caps = 0,
.init = darwin_init,
.exit = darwin_exit,
.get_device_list = NULL, /* not needed */
.get_device_descriptor = darwin_get_device_descriptor,
.get_active_config_descriptor = darwin_get_active_config_descriptor,
.get_config_descriptor = darwin_get_config_descriptor,
.hotplug_poll = darwin_hotplug_poll,
.open = darwin_open,
.close = darwin_close,
.get_configuration = darwin_get_configuration,
.set_configuration = darwin_set_configuration,
.claim_interface = darwin_claim_interface,
.release_interface = darwin_release_interface,
.set_interface_altsetting = darwin_set_interface_altsetting,
.clear_halt = darwin_clear_halt,
.reset_device = darwin_reset_device,
#if InterfaceVersion >= 550
.alloc_streams = darwin_alloc_streams,
.free_streams = darwin_free_streams,
#endif
.kernel_driver_active = darwin_kernel_driver_active,
.detach_kernel_driver = darwin_detach_kernel_driver,
.attach_kernel_driver = darwin_attach_kernel_driver,
.destroy_device = darwin_destroy_device,
.submit_transfer = darwin_submit_transfer,
.cancel_transfer = darwin_cancel_transfer,
.clear_transfer_priv = darwin_clear_transfer_priv,
.handle_transfer_completion = darwin_handle_transfer_completion,
.clock_gettime = darwin_clock_gettime,
.device_priv_size = sizeof(struct darwin_device_priv),
.device_handle_priv_size = sizeof(struct darwin_device_handle_priv),
.transfer_priv_size = sizeof(struct darwin_transfer_priv),
};