| /* |
| * Copyright 2020 The Chromium OS 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 "hal/usb/cros_device_config.h" |
| |
| #include <base/strings/stringprintf.h> |
| #include <base/system/sys_info.h> |
| |
| #include "cros-camera/common.h" |
| |
| namespace cros { |
| |
| namespace { |
| |
| constexpr char kCrosConfigCameraPath[] = "/camera"; |
| constexpr char kCrosConfigLegacyUsbKey[] = "legacy-usb"; |
| |
| } // namespace |
| |
| std::unique_ptr<CrosDeviceConfig> CrosDeviceConfig::Create() { |
| CrosDeviceConfig res = {}; |
| brillo::CrosConfig cros_config; |
| |
| if (!cros_config.Init()) { |
| LOGF(ERROR) << "Failed to initialize CrOS config"; |
| return nullptr; |
| } |
| |
| if (!cros_config.GetString("/", "name", &res.model_name)) { |
| LOGF(ERROR) << "Failed to get model name of CrOS device"; |
| return nullptr; |
| } |
| |
| std::string use_legacy_usb; |
| if (cros_config.GetString(kCrosConfigCameraPath, kCrosConfigLegacyUsbKey, |
| &use_legacy_usb)) { |
| if (use_legacy_usb == "true") { |
| LOGF(INFO) << "The CrOS device is marked to have v1 camera devices"; |
| } |
| res.is_v1_device = use_legacy_usb == "true"; |
| } else { |
| res.is_v1_device = false; |
| } |
| |
| // Get USB camera count from "count" and "devices" array in cros_config. |
| // TODO(kamesan): Use the ids, facing, orientation in cros_config to identify |
| // cameras and their layout. |
| res.usb_camera_count = [&]() -> base::Optional<int> { |
| // The "count" includes both MIPI and USB cameras, so we only know there's |
| // no USB camera when it's zero. |
| std::string count_str; |
| if (cros_config.GetString("/camera", "count", &count_str)) { |
| if (count_str == "0") { |
| return 0; |
| } |
| } |
| int count = 0; |
| for (int i = 0;; ++i) { |
| std::string interface; |
| if (!cros_config.GetString(base::StringPrintf("/camera/devices/%i", i), |
| "interface", &interface)) { |
| if (i == 0) { |
| // The "devices" array may be empty because there's no camera or |
| // the config is not provided, so we get no information in this case. |
| return base::nullopt; |
| } |
| break; |
| } |
| if (interface == "usb") { |
| ++count; |
| } |
| } |
| return count; |
| }(); |
| |
| return std::make_unique<CrosDeviceConfig>(res); |
| } |
| |
| } // namespace cros |