yuzu/src/input_common/gcadapter/gc_adapter.cpp

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// Copyright 2014 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
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#include <chrono>
#include <thread>
#include <libusb.h>
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#include "common/logging/log.h"
#include "input_common/gcadapter/gc_adapter.h"
namespace GCAdapter {
/// Used to loop through and assign button in poller
constexpr std::array<PadButton, 12> PadButtonArray{
PadButton::PAD_BUTTON_LEFT, PadButton::PAD_BUTTON_RIGHT, PadButton::PAD_BUTTON_DOWN,
PadButton::PAD_BUTTON_UP, PadButton::PAD_TRIGGER_Z, PadButton::PAD_TRIGGER_R,
PadButton::PAD_TRIGGER_L, PadButton::PAD_BUTTON_A, PadButton::PAD_BUTTON_B,
PadButton::PAD_BUTTON_X, PadButton::PAD_BUTTON_Y, PadButton::PAD_BUTTON_START,
};
Adapter::Adapter() {
if (usb_adapter_handle != nullptr) {
return;
}
LOG_INFO(Input, "GC Adapter Initialization started");
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const int init_res = libusb_init(&libusb_ctx);
if (init_res == LIBUSB_SUCCESS) {
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Setup();
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} else {
LOG_ERROR(Input, "libusb could not be initialized. failed with error = {}", init_res);
}
}
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GCPadStatus Adapter::GetPadStatus(std::size_t port, const std::array<u8, 37>& adapter_payload) {
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GCPadStatus pad = {};
const std::size_t offset = 1 + (9 * port);
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adapter_controllers_status[port] = static_cast<ControllerTypes>(adapter_payload[offset] >> 4);
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static constexpr std::array<PadButton, 8> b1_buttons{
PadButton::PAD_BUTTON_A, PadButton::PAD_BUTTON_B, PadButton::PAD_BUTTON_X,
PadButton::PAD_BUTTON_Y, PadButton::PAD_BUTTON_LEFT, PadButton::PAD_BUTTON_RIGHT,
PadButton::PAD_BUTTON_DOWN, PadButton::PAD_BUTTON_UP,
};
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static constexpr std::array<PadButton, 4> b2_buttons{
PadButton::PAD_BUTTON_START,
PadButton::PAD_TRIGGER_Z,
PadButton::PAD_TRIGGER_R,
PadButton::PAD_TRIGGER_L,
};
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static constexpr std::array<PadAxes, 6> axes{
PadAxes::StickX, PadAxes::StickY, PadAxes::SubstickX,
PadAxes::SubstickY, PadAxes::TriggerLeft, PadAxes::TriggerRight,
};
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if (adapter_controllers_status[port] == ControllerTypes::None && !get_origin[port]) {
// Controller may have been disconnected, recalibrate if reconnected.
get_origin[port] = true;
}
if (adapter_controllers_status[port] != ControllerTypes::None) {
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const u8 b1 = adapter_payload[offset + 1];
const u8 b2 = adapter_payload[offset + 2];
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for (std::size_t i = 0; i < b1_buttons.size(); ++i) {
if ((b1 & (1U << i)) != 0) {
pad.button |= static_cast<u16>(b1_buttons[i]);
}
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}
for (std::size_t j = 0; j < b2_buttons.size(); ++j) {
if ((b2 & (1U << j)) != 0) {
pad.button |= static_cast<u16>(b2_buttons[j]);
}
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}
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for (PadAxes axis : axes) {
const std::size_t index = static_cast<std::size_t>(axis);
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pad.axis_values[index] = adapter_payload[offset + 3 + index];
}
if (get_origin[port]) {
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origin_status[port].axis_values = pad.axis_values;
get_origin[port] = false;
}
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}
return pad;
}
void Adapter::PadToState(const GCPadStatus& pad, GCState& state) {
for (const auto& button : PadButtonArray) {
const u16 button_value = static_cast<u16>(button);
state.buttons.insert_or_assign(button_value, pad.button & button_value);
}
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for (size_t i = 0; i < pad.axis_values.size(); ++i) {
state.axes.insert_or_assign(static_cast<u8>(i), pad.axis_values[i]);
}
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}
void Adapter::Read() {
LOG_DEBUG(Input, "GC Adapter Read() thread started");
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int payload_size;
std::array<u8, 37> adapter_payload;
std::array<GCPadStatus, 4> pads;
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while (adapter_thread_running) {
libusb_interrupt_transfer(usb_adapter_handle, input_endpoint, adapter_payload.data(),
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sizeof(adapter_payload), &payload_size, 16);
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if (payload_size != sizeof(adapter_payload) || adapter_payload[0] != LIBUSB_DT_HID) {
LOG_ERROR(Input,
"Error reading payload (size: {}, type: {:02x}) Is the adapter connected?",
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payload_size, adapter_payload[0]);
adapter_thread_running = false; // error reading from adapter, stop reading.
break;
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}
for (std::size_t port = 0; port < pads.size(); ++port) {
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pads[port] = GetPadStatus(port, adapter_payload);
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if (DeviceConnected(port) && configuring) {
if (pads[port].button != 0) {
pad_queue[port].Push(pads[port]);
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}
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// Accounting for a threshold here to ensure an intentional press
for (size_t i = 0; i < pads[port].axis_values.size(); ++i) {
const u8 value = pads[port].axis_values[i];
const u8 origin = origin_status[port].axis_values[i];
if (value > origin + pads[port].THRESHOLD ||
value < origin - pads[port].THRESHOLD) {
pads[port].axis = static_cast<PadAxes>(i);
pads[port].axis_value = pads[port].axis_values[i];
pad_queue[port].Push(pads[port]);
}
}
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}
PadToState(pads[port], state[port]);
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}
std::this_thread::yield();
}
}
void Adapter::Setup() {
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// Initialize all controllers as unplugged
adapter_controllers_status.fill(ControllerTypes::None);
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// Initialize all ports to store axis origin values
get_origin.fill(true);
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// pointer to list of connected usb devices
libusb_device** devices{};
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// populate the list of devices, get the count
const ssize_t device_count = libusb_get_device_list(libusb_ctx, &devices);
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if (device_count < 0) {
LOG_ERROR(Input, "libusb_get_device_list failed with error: {}", device_count);
return;
}
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if (devices != nullptr) {
for (std::size_t index = 0; index < static_cast<std::size_t>(device_count); ++index) {
if (CheckDeviceAccess(devices[index])) {
// GC Adapter found and accessible, registering it
GetGCEndpoint(devices[index]);
break;
}
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}
libusb_free_device_list(devices, 1);
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}
}
bool Adapter::CheckDeviceAccess(libusb_device* device) {
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libusb_device_descriptor desc;
const int get_descriptor_error = libusb_get_device_descriptor(device, &desc);
if (get_descriptor_error) {
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// could not acquire the descriptor, no point in trying to use it.
LOG_ERROR(Input, "libusb_get_device_descriptor failed with error: {}",
get_descriptor_error);
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return false;
}
if (desc.idVendor != 0x057e || desc.idProduct != 0x0337) {
// This isn't the device we are looking for.
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return false;
}
const int open_error = libusb_open(device, &usb_adapter_handle);
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if (open_error == LIBUSB_ERROR_ACCESS) {
LOG_ERROR(Input, "Yuzu can not gain access to this device: ID {:04X}:{:04X}.",
desc.idVendor, desc.idProduct);
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return false;
}
if (open_error) {
LOG_ERROR(Input, "libusb_open failed to open device with error = {}", open_error);
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return false;
}
int kernel_driver_error = libusb_kernel_driver_active(usb_adapter_handle, 0);
if (kernel_driver_error == 1) {
kernel_driver_error = libusb_detach_kernel_driver(usb_adapter_handle, 0);
if (kernel_driver_error != 0 && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
LOG_ERROR(Input, "libusb_detach_kernel_driver failed with error = {}",
kernel_driver_error);
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}
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}
if (kernel_driver_error && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
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libusb_close(usb_adapter_handle);
usb_adapter_handle = nullptr;
return false;
}
const int interface_claim_error = libusb_claim_interface(usb_adapter_handle, 0);
if (interface_claim_error) {
LOG_ERROR(Input, "libusb_claim_interface failed with error = {}", interface_claim_error);
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libusb_close(usb_adapter_handle);
usb_adapter_handle = nullptr;
return false;
}
return true;
}
void Adapter::GetGCEndpoint(libusb_device* device) {
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libusb_config_descriptor* config = nullptr;
const int config_descriptor_return = libusb_get_config_descriptor(device, 0, &config);
if (config_descriptor_return != LIBUSB_SUCCESS) {
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LOG_ERROR(Input, "libusb_get_config_descriptor failed with error = {}",
config_descriptor_return);
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return;
}
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for (u8 ic = 0; ic < config->bNumInterfaces; ic++) {
const libusb_interface* interfaceContainer = &config->interface[ic];
for (int i = 0; i < interfaceContainer->num_altsetting; i++) {
const libusb_interface_descriptor* interface = &interfaceContainer->altsetting[i];
for (u8 e = 0; e < interface->bNumEndpoints; e++) {
const libusb_endpoint_descriptor* endpoint = &interface->endpoint[e];
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if (endpoint->bEndpointAddress & LIBUSB_ENDPOINT_IN) {
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input_endpoint = endpoint->bEndpointAddress;
} else {
output_endpoint = endpoint->bEndpointAddress;
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}
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}
}
}
// This transfer seems to be responsible for clearing the state of the adapter
// Used to clear the "busy" state of when the device is unexpectedly unplugged
unsigned char clear_payload = 0x13;
libusb_interrupt_transfer(usb_adapter_handle, output_endpoint, &clear_payload,
sizeof(clear_payload), nullptr, 16);
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adapter_thread_running = true;
adapter_input_thread = std::thread([=] { Read(); }); // Read input
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}
Adapter::~Adapter() {
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Reset();
}
void Adapter::Reset() {
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if (adapter_thread_running) {
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adapter_thread_running = false;
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}
adapter_input_thread.join();
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adapter_controllers_status.fill(ControllerTypes::None);
get_origin.fill(true);
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if (usb_adapter_handle) {
libusb_release_interface(usb_adapter_handle, 1);
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libusb_close(usb_adapter_handle);
usb_adapter_handle = nullptr;
}
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if (libusb_ctx) {
libusb_exit(libusb_ctx);
}
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}
bool Adapter::DeviceConnected(std::size_t port) {
return adapter_controllers_status[port] != ControllerTypes::None;
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}
void Adapter::ResetDeviceType(std::size_t port) {
adapter_controllers_status[port] = ControllerTypes::None;
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}
void Adapter::BeginConfiguration() {
get_origin.fill(true);
for (auto& pq : pad_queue) {
pq.Clear();
}
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configuring = true;
}
void Adapter::EndConfiguration() {
for (auto& pq : pad_queue) {
pq.Clear();
}
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configuring = false;
}
std::array<Common::SPSCQueue<GCPadStatus>, 4>& Adapter::GetPadQueue() {
return pad_queue;
}
const std::array<Common::SPSCQueue<GCPadStatus>, 4>& Adapter::GetPadQueue() const {
return pad_queue;
}
std::array<GCState, 4>& Adapter::GetPadState() {
return state;
}
const std::array<GCState, 4>& Adapter::GetPadState() const {
return state;
}
int Adapter::GetOriginValue(int port, int axis) const {
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return origin_status[port].axis_values[axis];
}
} // namespace GCAdapter