1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef DEVICE_USB_USB_DEVICE_IMPL_H_ 6 #define DEVICE_USB_USB_DEVICE_IMPL_H_ 7 8 #include <vector> 9 10 #include "base/basictypes.h" 11 #include "base/callback.h" 12 #include "base/threading/thread_checker.h" 13 #include "device/usb/usb_descriptors.h" 14 #include "device/usb/usb_device.h" 15 16 struct libusb_device; 17 struct libusb_config_descriptor; 18 19 namespace base { 20 class SingleThreadTaskRunner; 21 } 22 23 namespace device { 24 25 class UsbDeviceHandleImpl; 26 class UsbContext; 27 28 typedef libusb_device* PlatformUsbDevice; 29 typedef libusb_config_descriptor* PlatformUsbConfigDescriptor; 30 31 class UsbDeviceImpl : public UsbDevice { 32 public: 33 // UsbDevice implementation: 34 #if defined(OS_CHROMEOS) 35 virtual void RequestUsbAccess( 36 int interface_id, 37 const base::Callback<void(bool success)>& callback) OVERRIDE; 38 #endif // OS_CHROMEOS 39 virtual scoped_refptr<UsbDeviceHandle> Open() OVERRIDE; 40 virtual bool Close(scoped_refptr<UsbDeviceHandle> handle) OVERRIDE; 41 virtual const UsbConfigDescriptor& GetConfiguration() OVERRIDE; 42 virtual bool GetManufacturer(base::string16* manufacturer) OVERRIDE; 43 virtual bool GetProduct(base::string16* product) OVERRIDE; 44 virtual bool GetSerialNumber(base::string16* serial_number) OVERRIDE; 45 46 protected: 47 friend class UsbServiceImpl; 48 49 // Called by UsbServiceImpl only; 50 UsbDeviceImpl(scoped_refptr<UsbContext> context, 51 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner, 52 PlatformUsbDevice platform_device, 53 uint16 vendor_id, 54 uint16 product_id, 55 uint32 unique_id); 56 57 virtual ~UsbDeviceImpl(); 58 59 // Called only be UsbService. 60 void OnDisconnect(); 61 62 private: 63 base::ThreadChecker thread_checker_; 64 PlatformUsbDevice platform_device_; 65 66 #if defined(USE_UDEV) 67 // On Linux these properties are read from sysfs when the device is enumerated 68 // to avoid hitting the permission broker on Chrome OS for a real string 69 // descriptor request. 70 std::string manufacturer_; 71 std::string product_; 72 std::string serial_number_; 73 #endif 74 75 // The active configuration descriptor is not read immediately but cached for 76 // later use. 77 bool current_configuration_cached_; 78 UsbConfigDescriptor current_configuration_; 79 80 // Retain the context so that it will not be released before UsbDevice. 81 scoped_refptr<UsbContext> context_; 82 83 // Opened handles. 84 typedef std::vector<scoped_refptr<UsbDeviceHandleImpl> > HandlesVector; 85 HandlesVector handles_; 86 87 // Reference to the UI thread for permission-broker calls. 88 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_; 89 90 DISALLOW_COPY_AND_ASSIGN(UsbDeviceImpl); 91 }; 92 93 } // namespace device 94 95 #endif // DEVICE_USB_USB_DEVICE_IMPL_H_ 96