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boo/lib/inputdev/HIDDeviceIOKit.cpp

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#include "IHIDDevice.hpp"
#include <IOKit/hid/IOHIDLib.h>
#include <IOKit/hid/IOHIDDevicePlugin.h>
#include <IOKit/usb/IOUSBLib.h>
#include "IOKitPointer.hpp"
#include <thread>
namespace boo {
class HIDDeviceIOKit : public IHIDDevice {
DeviceToken& m_token;
std::shared_ptr<DeviceBase> m_devImp;
IUnknownPointer<IOUSBInterfaceInterface> m_usbIntf;
uint8_t m_usbIntfInPipe = 0;
uint8_t m_usbIntfOutPipe = 0;
CFPointer<IOHIDDeviceRef> m_hidIntf;
bool m_runningTransferLoop = false;
bool m_isBt = false;
std::string_view m_devPath;
std::mutex m_initMutex;
std::condition_variable m_initCond;
std::thread m_thread;
bool _sendUSBInterruptTransfer(const uint8_t* data, size_t length) {
if (m_usbIntf) {
IOReturn res = m_usbIntf->WritePipe(m_usbIntf.storage(), m_usbIntfOutPipe, (void*)data, length);
return res == kIOReturnSuccess;
}
return false;
}
size_t _receiveUSBInterruptTransfer(uint8_t* data, size_t length) {
if (m_usbIntf) {
UInt32 readSize = length;
IOReturn res = m_usbIntf->ReadPipe(m_usbIntf.storage(), m_usbIntfInPipe, data, &readSize);
if (res != kIOReturnSuccess)
return 0;
return readSize;
}
return 0;
}
std::vector<uint8_t> _getReportDescriptor() {
if (m_hidIntf) {
if (CFTypeRef desc = IOHIDDeviceGetProperty(m_hidIntf.get(), CFSTR(kIOHIDReportDescriptorKey))) {
CFIndex len = CFDataGetLength(CFDataRef(desc));
std::vector<uint8_t> ret(len, '\0');
CFDataGetBytes(CFDataRef(desc), CFRangeMake(0, len), &ret[0]);
return ret;
}
}
return {};
}
bool _sendHIDReport(const uint8_t* data, size_t length, HIDReportType tp, uint32_t message) {
/* HACK: A bug in IOBluetoothGamepadHIDDriver prevents raw output report transmission
* USB driver appears to work correctly */
if (m_hidIntf && !m_isBt) {
IOReturn res = IOHIDDeviceSetReport(m_hidIntf.get(), IOHIDReportType(tp), message, data, length);
return res == kIOReturnSuccess;
}
return false;
}
size_t _receiveHIDReport(uint8_t* data, size_t length, HIDReportType tp, uint32_t message) {
if (m_hidIntf) {
CFIndex readSize = length;
IOReturn res = IOHIDDeviceGetReport(m_hidIntf.get(), IOHIDReportType(tp), message, data, &readSize);
if (res != kIOReturnSuccess)
return 0;
return readSize;
}
return 0;
}
static void _threadProcUSBLL(std::shared_ptr<HIDDeviceIOKit> device) {
pthread_setname_np(fmt::format(fmt("{} Transfer Thread"), device->m_token.getProductName()).c_str());
std::unique_lock<std::mutex> lk(device->m_initMutex);
/* Get the HID element's parent (USB interrupt transfer-interface) */
IOObjectPointer<io_iterator_t> devIter;
IOObjectPointer<io_registry_entry_t> devEntry =
IORegistryEntryFromPath(kIOMasterPortDefault, device->m_devPath.data());
IOObjectPointer<io_object_t> interfaceEntry;
IORegistryEntryGetChildIterator(devEntry.get(), kIOServicePlane, &devIter);
while (IOObjectPointer<io_service_t> obj = IOIteratorNext(devIter.get())) {
if (IOObjectConformsTo(obj.get(), kIOUSBInterfaceClassName)) {
interfaceEntry = obj;
break;
}
}
if (!interfaceEntry) {
device->m_devImp->deviceError(fmt("Unable to find interface for {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
lk.unlock();
device->m_initCond.notify_one();
return;
}
/* IOKit Plugin COM interface (WTF Apple???) */
IOCFPluginPointer iodev;
SInt32 score;
IOReturn err;
err = IOCreatePlugInInterfaceForService(interfaceEntry.get(), kIOUSBInterfaceUserClientTypeID,
kIOCFPlugInInterfaceID, &iodev, &score);
if (err) {
device->m_devImp->deviceError(fmt("Unable to open {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
lk.unlock();
device->m_initCond.notify_one();
return;
}
/* USB interface function-pointer table */
IUnknownPointer<IOUSBInterfaceInterface> intf;
err = iodev.As(&intf, kIOUSBInterfaceInterfaceID);
if (err) {
device->m_devImp->deviceError(fmt("Unable to open {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
lk.unlock();
device->m_initCond.notify_one();
return;
}
/* Obtain exclusive lock on device */
device->m_usbIntf = intf;
err = intf->USBInterfaceOpen(intf.storage());
if (err != kIOReturnSuccess) {
if (err == kIOReturnExclusiveAccess) {
device->m_devImp->deviceError(fmt("Unable to open {}@{}: someone else using it\n"),
device->m_token.getProductName(), device->m_devPath);
} else {
device->m_devImp->deviceError(fmt("Unable to open {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
}
lk.unlock();
device->m_initCond.notify_one();
return;
}
/* Determine pipe indices for interrupt I/O */
UInt8 numEndpoints = 0;
err = intf->GetNumEndpoints(intf.storage(), &numEndpoints);
for (int i = 1; i < numEndpoints + 1; ++i) {
UInt8 dir, num, tType, interval;
UInt16 mPacketSz;
err = intf->GetPipeProperties(intf.storage(), i, &dir, &num, &tType, &mPacketSz, &interval);
if (tType == kUSBInterrupt) {
if (dir == kUSBIn)
device->m_usbIntfInPipe = num;
else if (dir == kUSBOut)
device->m_usbIntfOutPipe = num;
}
}
/* Return control to main thread */
device->m_runningTransferLoop = true;
lk.unlock();
device->m_initCond.notify_one();
/* Start transfer loop */
device->m_devImp->initialCycle();
while (device->m_runningTransferLoop)
device->m_devImp->transferCycle();
device->m_devImp->finalCycle();
/* Cleanup */
intf->USBInterfaceClose(intf.storage());
device->m_usbIntf = nullptr;
}
static void _threadProcBTLL(std::shared_ptr<HIDDeviceIOKit> device) {
std::unique_lock<std::mutex> lk(device->m_initMutex);
/* Return control to main thread */
device->m_runningTransferLoop = true;
lk.unlock();
device->m_initCond.notify_one();
/* Start transfer loop */
device->m_devImp->initialCycle();
while (device->m_runningTransferLoop)
device->m_devImp->transferCycle();
device->m_devImp->finalCycle();
}
static void _hidRemoveCb(void* _Nullable context, IOReturn result, void* _Nullable sender) {
reinterpret_cast<HIDDeviceIOKit*>(context)->m_runningTransferLoop = false;
}
static void _hidReportCb(void* _Nullable context, IOReturn, void* _Nullable, IOHIDReportType type, uint32_t reportID,
uint8_t* report, CFIndex reportLength) {
reinterpret_cast<DeviceBase*>(context)->receivedHIDReport(report, reportLength, HIDReportType(type), reportID);
}
static void _threadProcHID(std::shared_ptr<HIDDeviceIOKit> device) {
pthread_setname_np(fmt::format(fmt("{} Transfer Thread"), device->m_token.getProductName()).c_str());
std::unique_lock<std::mutex> lk(device->m_initMutex);
/* Get the HID element's object (HID device interface) */
IOObjectPointer<io_service_t> interfaceEntry =
IORegistryEntryFromPath(kIOMasterPortDefault, device->m_devPath.data());
if (!IOObjectConformsTo(interfaceEntry.get(), "IOHIDDevice")) {
device->m_devImp->deviceError(fmt("Unable to find interface for {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
lk.unlock();
device->m_initCond.notify_one();
return;
}
device->m_hidIntf = IOHIDDeviceCreate(nullptr, interfaceEntry.get());
if (!device->m_hidIntf) {
device->m_devImp->deviceError(fmt("Unable to open {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
lk.unlock();
device->m_initCond.notify_one();
return;
}
/* Open device */
IOReturn err = IOHIDDeviceOpen(device->m_hidIntf.get(), kIOHIDOptionsTypeNone);
if (err != kIOReturnSuccess) {
if (err == kIOReturnExclusiveAccess) {
device->m_devImp->deviceError(fmt("Unable to open {}@{}: someone else using it\n"),
device->m_token.getProductName(), device->m_devPath);
} else {
device->m_devImp->deviceError(fmt("Unable to open {}@{}\n"),
device->m_token.getProductName(), device->m_devPath);
}
lk.unlock();
device->m_initCond.notify_one();
return;
}
/* Register removal callback */
IOHIDDeviceRegisterRemovalCallback(device->m_hidIntf.get(), _hidRemoveCb, device.get());
/* Make note if device uses bluetooth driver */
if (CFTypeRef transport = IOHIDDeviceGetProperty(device->m_hidIntf.get(), CFSTR(kIOHIDTransportKey)))
device->m_isBt =
CFStringCompare(CFStringRef(transport), CFSTR(kIOHIDTransportBluetoothValue), 0) == kCFCompareEqualTo;
/* Register input buffer */
std::unique_ptr<uint8_t[]> buffer;
int bufSize = 0;
if (CFTypeRef maxSize = IOHIDDeviceGetProperty(device->m_hidIntf.get(), CFSTR(kIOHIDMaxInputReportSizeKey)))
CFNumberGetValue(CFNumberRef(maxSize), kCFNumberIntType, &bufSize);
if (bufSize) {
buffer = std::unique_ptr<uint8_t[]>(new uint8_t[bufSize]);
IOHIDDeviceRegisterInputReportCallback(device->m_hidIntf.get(), buffer.get(), bufSize, _hidReportCb,
device->m_devImp.get());
IOHIDDeviceScheduleWithRunLoop(device->m_hidIntf.get(), CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
}
/* Return control to main thread */
device->m_runningTransferLoop = true;
lk.unlock();
device->m_initCond.notify_one();
/* Start transfer loop */
device->m_devImp->initialCycle();
while (device->m_runningTransferLoop) {
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.010, true);
if (device->m_runningTransferLoop)
device->m_devImp->transferCycle();
}
device->m_devImp->finalCycle();
/* Cleanup */
IOHIDDeviceClose(device->m_hidIntf.get(), kIOHIDOptionsTypeNone);
device->m_hidIntf.reset();
}
void _deviceDisconnected() { m_runningTransferLoop = false; }
public:
HIDDeviceIOKit(DeviceToken& token, const std::shared_ptr<DeviceBase>& devImp)
: m_token(token), m_devImp(devImp), m_devPath(token.getDevicePath()) {}
void _startThread() {
std::unique_lock<std::mutex> lk(m_initMutex);
DeviceType dType = m_token.getDeviceType();
if (dType == DeviceType::USB)
m_thread = std::thread(_threadProcUSBLL, std::static_pointer_cast<HIDDeviceIOKit>(shared_from_this()));
else if (dType == DeviceType::Bluetooth)
m_thread = std::thread(_threadProcBTLL, std::static_pointer_cast<HIDDeviceIOKit>(shared_from_this()));
else if (dType == DeviceType::HID)
m_thread = std::thread(_threadProcHID, std::static_pointer_cast<HIDDeviceIOKit>(shared_from_this()));
else {
fmt::print(stderr, fmt("invalid token supplied to device constructor\n"));
return;
}
m_initCond.wait(lk);
}
~HIDDeviceIOKit() {
m_runningTransferLoop = false;
if (m_thread.joinable())
m_thread.detach();
}
};
std::shared_ptr<IHIDDevice> IHIDDeviceNew(DeviceToken& token, const std::shared_ptr<DeviceBase>& devImp) {
return std::make_shared<HIDDeviceIOKit>(token, devImp);
}
} // namespace boo
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