| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "device/gamepad/gamepad_platform_data_fetcher_linux.h" |
| |
| #include <stddef.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/trace_event/trace_event.h" |
| #include "device/gamepad/gamepad_id_list.h" |
| #include "device/gamepad/gamepad_uma.h" |
| #include "device/udev_linux/scoped_udev.h" |
| #include "device/udev_linux/udev_linux.h" |
| |
| namespace device { |
| |
| GamepadPlatformDataFetcherLinux::GamepadPlatformDataFetcherLinux() = default; |
| |
| GamepadPlatformDataFetcherLinux::~GamepadPlatformDataFetcherLinux() { |
| for (auto it = devices_.begin(); it != devices_.end(); ++it) { |
| GamepadDeviceLinux* device = it->get(); |
| device->Shutdown(); |
| } |
| } |
| |
| GamepadSource GamepadPlatformDataFetcherLinux::source() { |
| return Factory::static_source(); |
| } |
| |
| void GamepadPlatformDataFetcherLinux::OnAddedToProvider() { |
| std::vector<UdevLinux::UdevMonitorFilter> filters; |
| filters.push_back( |
| UdevLinux::UdevMonitorFilter(UdevGamepadLinux::kInputSubsystem, nullptr)); |
| filters.push_back(UdevLinux::UdevMonitorFilter( |
| UdevGamepadLinux::kHidrawSubsystem, nullptr)); |
| udev_.reset(new UdevLinux( |
| filters, base::Bind(&GamepadPlatformDataFetcherLinux::RefreshDevice, |
| base::Unretained(this)))); |
| |
| for (auto it = devices_.begin(); it != devices_.end(); ++it) |
| it->get()->Shutdown(); |
| devices_.clear(); |
| |
| EnumerateSubsystemDevices(UdevGamepadLinux::kInputSubsystem); |
| EnumerateSubsystemDevices(UdevGamepadLinux::kHidrawSubsystem); |
| } |
| |
| void GamepadPlatformDataFetcherLinux::GetGamepadData(bool) { |
| TRACE_EVENT0("GAMEPAD", "GetGamepadData"); |
| |
| // Update our internal state. |
| for (size_t i = 0; i < Gamepads::kItemsLengthCap; ++i) |
| ReadDeviceData(i); |
| } |
| |
| // static |
| void GamepadPlatformDataFetcherLinux::UpdateGamepadStrings( |
| const std::string& name, |
| uint16_t vendor_id, |
| uint16_t product_id, |
| bool has_standard_mapping, |
| Gamepad* pad) { |
| // Set the ID string. The ID contains the device name, vendor and product IDs, |
| // and an indication of whether the standard mapping is in use. |
| std::string id = base::StringPrintf( |
| "%s (%sVendor: %04x Product: %04x)", name.c_str(), |
| has_standard_mapping ? "STANDARD GAMEPAD " : "", vendor_id, product_id); |
| base::TruncateUTF8ToByteSize(id, Gamepad::kIdLengthCap - 1, &id); |
| base::string16 tmp16 = base::UTF8ToUTF16(id); |
| memset(pad->id, 0, sizeof(pad->id)); |
| tmp16.copy(pad->id, arraysize(pad->id) - 1); |
| |
| // Set the mapper string to "standard" if the gamepad has a standard mapping, |
| // or the empty string otherwise. |
| if (has_standard_mapping) { |
| std::string mapping = "standard"; |
| base::TruncateUTF8ToByteSize(mapping, Gamepad::kMappingLengthCap - 1, |
| &mapping); |
| tmp16 = base::UTF8ToUTF16(mapping); |
| memset(pad->mapping, 0, sizeof(pad->mapping)); |
| tmp16.copy(pad->mapping, arraysize(pad->mapping) - 1); |
| } else { |
| pad->mapping[0] = 0; |
| } |
| } |
| |
| // Used during enumeration, and monitor notifications. |
| void GamepadPlatformDataFetcherLinux::RefreshDevice(udev_device* dev) { |
| std::unique_ptr<UdevGamepadLinux> udev_gamepad = |
| UdevGamepadLinux::Create(dev); |
| if (udev_gamepad) { |
| const UdevGamepadLinux& pad_info = *udev_gamepad.get(); |
| if (pad_info.type == UdevGamepadLinux::Type::JOYDEV) |
| RefreshJoydevDevice(dev, pad_info); |
| else if (pad_info.type == UdevGamepadLinux::Type::EVDEV) |
| RefreshEvdevDevice(dev, pad_info); |
| else if (pad_info.type == UdevGamepadLinux::Type::HIDRAW) |
| RefreshHidrawDevice(dev, pad_info); |
| } |
| } |
| |
| GamepadDeviceLinux* GamepadPlatformDataFetcherLinux::GetDeviceWithJoydevIndex( |
| int joydev_index) { |
| for (auto it = devices_.begin(); it != devices_.end(); ++it) { |
| GamepadDeviceLinux* device = it->get(); |
| if (device->GetJoydevIndex() == joydev_index) |
| return device; |
| } |
| |
| return nullptr; |
| } |
| |
| void GamepadPlatformDataFetcherLinux::RemoveDevice(GamepadDeviceLinux* device) { |
| for (auto it = devices_.begin(); it != devices_.end(); ++it) { |
| if (it->get() == device) { |
| device->Shutdown(); |
| devices_.erase(it); |
| break; |
| } |
| } |
| } |
| |
| GamepadDeviceLinux* GamepadPlatformDataFetcherLinux::GetOrCreateMatchingDevice( |
| const UdevGamepadLinux& pad_info) { |
| for (auto it = devices_.begin(); it != devices_.end(); ++it) { |
| GamepadDeviceLinux* device = it->get(); |
| if (device->IsSameDevice(pad_info)) |
| return device; |
| } |
| |
| auto emplace_result = devices_.emplace( |
| std::make_unique<GamepadDeviceLinux>(pad_info.syspath_prefix)); |
| return emplace_result.first->get(); |
| } |
| |
| void GamepadPlatformDataFetcherLinux::RefreshJoydevDevice( |
| udev_device* dev, |
| const UdevGamepadLinux& pad_info) { |
| const int joydev_index = pad_info.index; |
| if (joydev_index < 0 || joydev_index >= (int)Gamepads::kItemsLengthCap) |
| return; |
| |
| GamepadDeviceLinux* device = GetOrCreateMatchingDevice(pad_info); |
| if (device == nullptr) |
| return; |
| |
| PadState* state = GetPadState(joydev_index); |
| if (!state) { |
| // No slot available for device, don't use. |
| RemoveDevice(device); |
| return; |
| } |
| |
| // The device pointed to by dev contains information about the logical |
| // joystick device. In order to get the information about the physical |
| // hardware, get the parent device that is also in the "input" subsystem. |
| // This function should just walk up the tree one level. |
| udev_device* parent_dev = |
| device::udev_device_get_parent_with_subsystem_devtype( |
| dev, UdevGamepadLinux::kInputSubsystem, nullptr); |
| if (!parent_dev) { |
| device->CloseJoydevNode(); |
| if (device->IsEmpty()) |
| RemoveDevice(device); |
| return; |
| } |
| |
| // If the device cannot be opened, the joystick has been disconnected. |
| if (!device->OpenJoydevNode(pad_info, dev)) { |
| if (device->IsEmpty()) |
| RemoveDevice(device); |
| return; |
| } |
| |
| // Joydev uses its own internal list of device IDs to identify known gamepads. |
| // If the device is on our list, record it by ID. If the device is unknown, |
| // record that an unknown gamepad was enumerated. |
| uint16_t vendor_id = device->GetVendorId(); |
| uint16_t product_id = device->GetProductId(); |
| GamepadId gamepad_id = |
| GamepadIdList::Get().GetGamepadId(vendor_id, product_id); |
| if (gamepad_id == GamepadId::kUnknownGamepad) |
| RecordUnknownGamepad(source()); |
| else |
| RecordConnectedGamepad(vendor_id, product_id); |
| |
| state->mapper = device->GetMappingFunction(); |
| |
| Gamepad& pad = state->data; |
| UpdateGamepadStrings(device->GetName(), device->GetVendorId(), |
| device->GetProductId(), state->mapper != nullptr, &pad); |
| |
| pad.vibration_actuator.type = GamepadHapticActuatorType::kDualRumble; |
| pad.vibration_actuator.not_null = device->SupportsVibration(); |
| |
| pad.connected = true; |
| } |
| |
| void GamepadPlatformDataFetcherLinux::RefreshEvdevDevice( |
| udev_device* dev, |
| const UdevGamepadLinux& pad_info) { |
| GamepadDeviceLinux* device = GetOrCreateMatchingDevice(pad_info); |
| if (device == nullptr) |
| return; |
| |
| if (!device->OpenEvdevNode(pad_info)) { |
| if (device->IsEmpty()) |
| RemoveDevice(device); |
| return; |
| } |
| |
| int joydev_index = device->GetJoydevIndex(); |
| if (joydev_index >= 0) { |
| PadState* state = GetPadState(joydev_index); |
| DCHECK(state); |
| if (state) { |
| Gamepad& pad = state->data; |
| |
| // To select the correct mapper for an arbitrary gamepad we may need info |
| // from both the joydev and evdev nodes. For instance, a gamepad that |
| // connects over USB and Bluetooth may need to select a mapper based on |
| // the connection type, but this information is only available through |
| // evdev. To ensure that gamepads are usable when evdev is unavailable, a |
| // preliminary mapping is assigned when the joydev node is enumerated. |
| // |
| // Here we check if associating the evdev node changed the mapping |
| // function that should be used for this gamepad. If so, assign the new |
| // mapper and rebuild the gamepad strings. |
| GamepadStandardMappingFunction mapper = device->GetMappingFunction(); |
| if (mapper != state->mapper) { |
| state->mapper = mapper; |
| UpdateGamepadStrings(device->GetName(), device->GetVendorId(), |
| device->GetProductId(), mapper != nullptr, &pad); |
| } |
| |
| pad.vibration_actuator.not_null = device->SupportsVibration(); |
| } |
| } |
| } |
| |
| void GamepadPlatformDataFetcherLinux::RefreshHidrawDevice( |
| udev_device* dev, |
| const UdevGamepadLinux& pad_info) { |
| GamepadDeviceLinux* device = GetOrCreateMatchingDevice(pad_info); |
| if (device == nullptr) |
| return; |
| |
| if (!device->OpenHidrawNode(pad_info)) { |
| if (device->IsEmpty()) |
| RemoveDevice(device); |
| return; |
| } |
| |
| int joydev_index = device->GetJoydevIndex(); |
| if (joydev_index >= 0) { |
| PadState* state = GetPadState(joydev_index); |
| DCHECK(state); |
| if (state) { |
| Gamepad& pad = state->data; |
| pad.vibration_actuator.not_null = device->SupportsVibration(); |
| } |
| } |
| } |
| |
| void GamepadPlatformDataFetcherLinux::EnumerateSubsystemDevices( |
| const std::string& subsystem) { |
| if (!udev_->udev_handle()) |
| return; |
| ScopedUdevEnumeratePtr enumerate(udev_enumerate_new(udev_->udev_handle())); |
| if (!enumerate) |
| return; |
| int ret = |
| udev_enumerate_add_match_subsystem(enumerate.get(), subsystem.c_str()); |
| if (ret != 0) |
| return; |
| ret = udev_enumerate_scan_devices(enumerate.get()); |
| if (ret != 0) |
| return; |
| |
| udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate.get()); |
| for (udev_list_entry* dev_list_entry = devices; dev_list_entry != nullptr; |
| dev_list_entry = udev_list_entry_get_next(dev_list_entry)) { |
| // Get the filename of the /sys entry for the device and create a |
| // udev_device object (dev) representing it |
| const char* path = udev_list_entry_get_name(dev_list_entry); |
| ScopedUdevDevicePtr dev( |
| udev_device_new_from_syspath(udev_->udev_handle(), path)); |
| if (!dev) |
| continue; |
| RefreshDevice(dev.get()); |
| } |
| } |
| |
| void GamepadPlatformDataFetcherLinux::ReadDeviceData(size_t index) { |
| CHECK_LT(index, Gamepads::kItemsLengthCap); |
| |
| GamepadDeviceLinux* device = GetDeviceWithJoydevIndex(index); |
| if (!device) |
| return; |
| |
| PadState* state = GetPadState(index); |
| if (!state) |
| return; |
| |
| device->ReadPadState(&state->data); |
| } |
| |
| void GamepadPlatformDataFetcherLinux::PlayEffect( |
| int pad_id, |
| mojom::GamepadHapticEffectType type, |
| mojom::GamepadEffectParametersPtr params, |
| mojom::GamepadHapticsManager::PlayVibrationEffectOnceCallback callback, |
| scoped_refptr<base::SequencedTaskRunner> callback_runner) { |
| if (pad_id < 0 || pad_id >= static_cast<int>(Gamepads::kItemsLengthCap)) { |
| RunVibrationCallback( |
| std::move(callback), std::move(callback_runner), |
| mojom::GamepadHapticsResult::GamepadHapticsResultError); |
| return; |
| } |
| |
| GamepadDeviceLinux* device = GetDeviceWithJoydevIndex(pad_id); |
| if (!device) { |
| RunVibrationCallback( |
| std::move(callback), std::move(callback_runner), |
| mojom::GamepadHapticsResult::GamepadHapticsResultError); |
| return; |
| } |
| |
| device->PlayEffect(type, std::move(params), std::move(callback), |
| std::move(callback_runner)); |
| } |
| |
| void GamepadPlatformDataFetcherLinux::ResetVibration( |
| int pad_id, |
| mojom::GamepadHapticsManager::ResetVibrationActuatorCallback callback, |
| scoped_refptr<base::SequencedTaskRunner> callback_runner) { |
| if (pad_id < 0 || pad_id >= static_cast<int>(Gamepads::kItemsLengthCap)) { |
| RunVibrationCallback( |
| std::move(callback), std::move(callback_runner), |
| mojom::GamepadHapticsResult::GamepadHapticsResultError); |
| return; |
| } |
| |
| GamepadDeviceLinux* device = GetDeviceWithJoydevIndex(pad_id); |
| if (!device) { |
| RunVibrationCallback( |
| std::move(callback), std::move(callback_runner), |
| mojom::GamepadHapticsResult::GamepadHapticsResultError); |
| return; |
| } |
| |
| device->ResetVibration(std::move(callback), std::move(callback_runner)); |
| } |
| |
| } // namespace device |