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