dlls/hidclass.sys/device.c

   1 /*
   2  * HIDClass device functions
   3  *
   4  * Copyright (C) 2015 Aric Stewart
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdarg.h>
  24 #define NONAMELESSUNION
  25 #include "hid.h"
  26 #include "wine/unicode.h"
  27 #include "winreg.h"
  28 #include "winuser.h"
  29 #include "setupapi.h"
  30
  31 #include "wine/debug.h"
  32 #include "ddk/hidsdi.h"
  33 #include "ddk/hidtypes.h"
  34
  35 #include "initguid.h"
  36 #include "devguid.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(hid);
  39 WINE_DECLARE_DEBUG_CHANNEL(hid_report);
  40
  41 static const WCHAR device_name_fmtW[] = {'\\','D','e','v','i','c','e',
  42     '\\','H','I','D','#','%','p','&','%','p',0};
  43 static const WCHAR device_regname_fmtW[] = {'H','I','D','\\',
  44     'v','i','d','_','%','0','4','x','&','p','i','d','_','%',
  45     '0','4','x','&','%','s','\\','%','i','&','%','s',0};
  46 static const WCHAR device_link_fmtW[] = {'\\','?','?','\\','h','i','d','#',
  47     'v','i','d','_','%','0','4','x','&','p','i','d','_','%',
  48     '0','4','x','&','%','s','#','%','i','&','%','s','#','%','s',0};
  49 /* GUID_DEVINTERFACE_HID */
  50 static const WCHAR class_guid[] = {'{','4','D','1','E','5','5','B','2',
  51     '-','F','1','6','F','-','1','1','C','F','-','8','8','C','B','-','0','0',
  52     '1','1','1','1','0','0','0','0','3','0','}',0};
  53
  54
  55 NTSTATUS HID_CreateDevice(DEVICE_OBJECT *native_device, HID_MINIDRIVER_REGISTRATION *driver, DEVICE_OBJECT **device)
  56 {
  57     WCHAR dev_name[255];
  58     UNICODE_STRING nameW;
  59     NTSTATUS status;
  60     BASE_DEVICE_EXTENSION *ext;
  61
  62     sprintfW(dev_name, device_name_fmtW, driver->DriverObject, native_device);
  63     RtlInitUnicodeString( &nameW, dev_name );
  64
  65     TRACE("Create base hid device %s\n", debugstr_w(dev_name));
  66
  67     status = IoCreateDevice(driver->DriverObject, driver->DeviceExtensionSize + sizeof(BASE_DEVICE_EXTENSION), &nameW, 0, 0, FALSE, device);
  68     if (status)
  69     {
  70         FIXME( "failed to create device error %x\n", status );
  71         return status;
  72     }
  73
  74     ext = (*device)->DeviceExtension;
  75
  76     ext->deviceExtension.MiniDeviceExtension = ext + 1;
  77     ext->deviceExtension.PhysicalDeviceObject = *device;
  78     ext->deviceExtension.NextDeviceObject = native_device;
  79     ext->device_name = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(dev_name) + 1) * sizeof(WCHAR));
  80     lstrcpyW(ext->device_name, dev_name);
  81     ext->link_name = NULL;
  82
  83     return S_OK;
  84 }
  85
  86 NTSTATUS HID_LinkDevice(DEVICE_OBJECT *device, LPCWSTR serial, LPCWSTR index)
  87 {
  88     WCHAR regname[255];
  89     WCHAR dev_link[255];
  90     SP_DEVINFO_DATA Data;
  91     UNICODE_STRING nameW, linkW;
  92     NTSTATUS status;
  93     HDEVINFO devinfo;
  94     GUID hidGuid;
  95     BASE_DEVICE_EXTENSION *ext;
  96
  97     HidD_GetHidGuid(&hidGuid);
  98     ext = device->DeviceExtension;
  99
 100     sprintfW(dev_link, device_link_fmtW, ext->information.VendorID,
 101         ext->information.ProductID, index, ext->information.VersionNumber, serial,
 102         class_guid);
 103     struprW(dev_link);
 104
 105     RtlInitUnicodeString( &nameW, ext->device_name);
 106     RtlInitUnicodeString( &linkW, dev_link );
 107
 108     TRACE("Create link %s\n", debugstr_w(dev_link));
 109
 110     ext->link_name = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR) * (lstrlenW(dev_link) + 1));
 111     lstrcpyW(ext->link_name, dev_link);
 112
 113     status = IoCreateSymbolicLink( &linkW, &nameW );
 114     if (status)
 115     {
 116         FIXME( "failed to create link error %x\n", status );
 117         return status;
 118     }
 119
 120     sprintfW(regname, device_regname_fmtW, ext->information.VendorID, ext->information.ProductID, index, ext->information.VersionNumber, serial);
 121
 122     devinfo = SetupDiGetClassDevsW(&GUID_DEVCLASS_HIDCLASS, NULL, NULL, DIGCF_DEVICEINTERFACE);
 123     if (!devinfo)
 124     {
 125         FIXME( "failed to get ClassDevs %x\n", GetLastError());
 126         return GetLastError();
 127     }
 128     Data.cbSize = sizeof(Data);
 129     if (!SetupDiCreateDeviceInfoW(devinfo, regname, &GUID_DEVCLASS_HIDCLASS, NULL, NULL, DICD_INHERIT_CLASSDRVS, &Data))
 130     {
 131         if (GetLastError() == ERROR_DEVINST_ALREADY_EXISTS)
 132         {
 133             SetupDiDestroyDeviceInfoList(devinfo);
 134             return ERROR_SUCCESS;
 135         }
 136         FIXME( "failed to Create Device Info %x\n", GetLastError());
 137         return GetLastError();
 138     }
 139     if (!SetupDiRegisterDeviceInfo( devinfo, &Data, 0, NULL, NULL, NULL ))
 140     {
 141         FIXME( "failed to Register Device Info %x\n", GetLastError());
 142         return GetLastError();
 143     }
 144     if (!SetupDiCreateDeviceInterfaceW( devinfo, &Data,  &hidGuid, NULL, 0, NULL))
 145     {
 146         FIXME( "failed to Create Device Interface %x\n", GetLastError());
 147         return GetLastError();
 148     }
 149     SetupDiDestroyDeviceInfoList(devinfo);
 150
 151     return S_OK;
 152 }
 153
 154 void HID_DeleteDevice(HID_MINIDRIVER_REGISTRATION *driver, DEVICE_OBJECT *device)
 155 {
 156     NTSTATUS status;
 157     BASE_DEVICE_EXTENSION *ext;
 158     UNICODE_STRING linkW;
 159     LIST_ENTRY *entry;
 160     IRP *irp;
 161
 162     ext = device->DeviceExtension;
 163
 164     if (ext->link_name)
 165     {
 166         TRACE("Delete link %s\n", debugstr_w(ext->link_name));
 167         RtlInitUnicodeString(&linkW, ext->link_name);
 168
 169         status = IoDeleteSymbolicLink(&linkW);
 170         if (status != STATUS_SUCCESS)
 171             ERR("Delete Symbolic Link failed (%x)\n",status);
 172     }
 173
 174     if (ext->thread)
 175     {
 176         SetEvent(ext->halt_event);
 177         WaitForSingleObject(ext->thread, INFINITE);
 178     }
 179     CloseHandle(ext->halt_event);
 180
 181     HeapFree(GetProcessHeap(), 0, ext->preparseData);
 182     if (ext->ring_buffer)
 183         RingBuffer_Destroy(ext->ring_buffer);
 184
 185     entry = RemoveHeadList(&ext->irp_queue);
 186     while(entry != &ext->irp_queue)
 187     {
 188         irp = CONTAINING_RECORD(entry, IRP, Tail.Overlay.ListEntry);
 189         irp->IoStatus.u.Status = STATUS_DEVICE_REMOVED;
 190         IoCompleteRequest(irp, IO_NO_INCREMENT);
 191         entry = RemoveHeadList(&ext->irp_queue);
 192     }
 193
 194     TRACE("Delete device(%p) %s\n", device, debugstr_w(ext->device_name));
 195     HeapFree(GetProcessHeap(), 0, ext->device_name);
 196     HeapFree(GetProcessHeap(), 0, ext->link_name);
 197
 198     IoDeleteDevice(device);
 199 }
 200
 201 static void HID_Device_processQueue(DEVICE_OBJECT *device)
 202 {
 203     LIST_ENTRY *entry;
 204     IRP *irp;
 205     BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
 206     UINT buffer_size = RingBuffer_GetBufferSize(ext->ring_buffer);
 207     HID_XFER_PACKET *packet;
 208
 209     packet = HeapAlloc(GetProcessHeap(), 0, buffer_size);
 210
 211     entry = RemoveHeadList(&ext->irp_queue);
 212     while(entry != &ext->irp_queue)
 213     {
 214         int ptr;
 215         irp = CONTAINING_RECORD(entry, IRP, Tail.Overlay.ListEntry);
 216         ptr = PtrToUlong( irp->Tail.Overlay.OriginalFileObject->FsContext );
 217
 218         RingBuffer_Read(ext->ring_buffer, ptr, packet, &buffer_size);
 219         if (buffer_size)
 220         {
 221             IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation(irp);
 222             TRACE_(hid_report)("Processing Request (%i)\n",ptr);
 223             if (irpsp->Parameters.Read.Length >= packet->reportBufferLen)
 224             {
 225                 memcpy(irp->AssociatedIrp.SystemBuffer, packet->reportBuffer, packet->reportBufferLen);
 226                 irp->IoStatus.Information = packet->reportBufferLen;
 227                 irp->IoStatus.u.Status = STATUS_SUCCESS;
 228             }
 229             else
 230             {
 231                 irp->IoStatus.Information = 0;
 232                 irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
 233             }
 234         }
 235         else
 236         {
 237             irp->IoStatus.Information = 0;
 238             irp->IoStatus.u.Status = STATUS_UNSUCCESSFUL;
 239         }
 240         IoCompleteRequest( irp, IO_NO_INCREMENT );
 241         entry = RemoveHeadList(&ext->irp_queue);
 242     }
 243     HeapFree(GetProcessHeap(), 0, packet);
 244 }
 245
 246 static NTSTATUS WINAPI read_Completion(DEVICE_OBJECT *deviceObject, IRP *irp, void *context )
 247 {
 248     SetEvent(irp->UserEvent);
 249     return STATUS_MORE_PROCESSING_REQUIRED;
 250 }
 251
 252 static DWORD CALLBACK hid_device_thread(void *args)
 253 {
 254     DEVICE_OBJECT *device = (DEVICE_OBJECT*)args;
 255
 256     IRP *irp;
 257     IO_STATUS_BLOCK irp_status;
 258     IO_STACK_LOCATION *irpsp;
 259     DWORD rc;
 260     HANDLE events[2];
 261     NTSTATUS ntrc;
 262
 263     BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
 264     events[0] = CreateEventA(NULL, FALSE, FALSE, NULL);
 265     events[1] = ext->halt_event;
 266
 267     if (ext->information.Polled)
 268     {
 269         while(1)
 270         {
 271             HID_XFER_PACKET *packet;
 272             ResetEvent(events[0]);
 273
 274             packet = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*packet) + ext->preparseData->caps.InputReportByteLength);
 275             packet->reportBufferLen = ext->preparseData->caps.InputReportByteLength;
 276             packet->reportBuffer = ((BYTE*)packet) + sizeof(*packet);
 277             packet->reportId = 0;
 278
 279             irp = IoBuildDeviceIoControlRequest(IOCTL_HID_GET_INPUT_REPORT,
 280                 device, NULL, 0, packet, sizeof(packet), TRUE, events[0],
 281                 &irp_status);
 282
 283             irpsp = IoGetNextIrpStackLocation(irp);
 284             irpsp->CompletionRoutine = read_Completion;
 285             irpsp->Control = SL_INVOKE_ON_SUCCESS | SL_INVOKE_ON_ERROR;
 286
 287             ntrc = IoCallDriver(device, irp);
 288
 289             if (ntrc == STATUS_PENDING)
 290                 rc = WaitForMultipleObjects(2, events, FALSE, INFINITE);
 291
 292             if (irp->IoStatus.u.Status == STATUS_SUCCESS)
 293             {
 294                 RingBuffer_Write(ext->ring_buffer, packet);
 295                 HID_Device_processQueue(device);
 296             }
 297
 298             IoCompleteRequest(irp, IO_NO_INCREMENT );
 299
 300             rc = WaitForSingleObject(ext->halt_event, ext->poll_interval);
 301
 302             if (rc == WAIT_OBJECT_0)
 303                 break;
 304             else if (rc != WAIT_TIMEOUT)
 305                 ERR("Wait returned unexpected value %x\n",rc);
 306         }
 307     }
 308     else
 309     {
 310         INT exit_now = FALSE;
 311
 312         HID_XFER_PACKET *packet;
 313         packet = HeapAlloc(GetProcessHeap(), 0, sizeof(*packet) + ext->preparseData->caps.InputReportByteLength);
 314         packet->reportBufferLen = ext->preparseData->caps.InputReportByteLength;
 315         packet->reportBuffer = ((BYTE*)packet) + sizeof(*packet);
 316         packet->reportId = 0;
 317
 318         while(1)
 319         {
 320             BYTE *buffer;
 321
 322             buffer = HeapAlloc(GetProcessHeap(), 0, ext->preparseData->caps.InputReportByteLength);
 323
 324             ResetEvent(events[0]);
 325
 326             irp = IoBuildDeviceIoControlRequest(IOCTL_HID_READ_REPORT,
 327                 device, NULL, 0, buffer,
 328                 ext->preparseData->caps.InputReportByteLength, TRUE, events[0],
 329                 &irp_status);
 330
 331             irpsp = IoGetNextIrpStackLocation(irp);
 332             irpsp->CompletionRoutine = read_Completion;
 333             irpsp->Control = SL_INVOKE_ON_SUCCESS | SL_INVOKE_ON_ERROR;
 334
 335             ntrc = IoCallDriver(device, irp);
 336
 337             if (ntrc == STATUS_PENDING)
 338             {
 339                 rc = WaitForMultipleObjects(2, events, FALSE, INFINITE);
 340
 341                 if (rc == WAIT_OBJECT_0 + 1)
 342                     exit_now = TRUE;
 343             }
 344
 345             if (!exit_now && irp->IoStatus.u.Status == STATUS_SUCCESS)
 346             {
 347                 packet->reportId = buffer[0];
 348                 memcpy(packet->reportBuffer, buffer, ext->preparseData->caps.InputReportByteLength);
 349                 RingBuffer_Write(ext->ring_buffer, packet);
 350                 HID_Device_processQueue(device);
 351             }
 352
 353             IoCompleteRequest(irp, IO_NO_INCREMENT );
 354
 355             if (exit_now)
 356                 break;
 357         }
 358
 359         HeapFree(GetProcessHeap(), 0, packet);
 360     }
 361
 362     CloseHandle(events[0]);
 363
 364     TRACE("Device thread exiting\n");
 365     return 1;
 366 }
 367
 368 void HID_StartDeviceThread(DEVICE_OBJECT *device)
 369 {
 370     BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
 371     ext->halt_event = CreateEventA(NULL, FALSE, FALSE, NULL);
 372     ext->thread = CreateThread(NULL, 0, hid_device_thread, device, 0, NULL);
 373 }
 374
 375 static NTSTATUS handle_IOCTL_HID_GET_COLLECTION_INFORMATION(IRP *irp, BASE_DEVICE_EXTENSION *base)
 376 {
 377     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 378     if (irpsp->Parameters.DeviceIoControl.OutputBufferLength <  sizeof(HID_COLLECTION_INFORMATION))
 379     {
 380         irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
 381         irp->IoStatus.Information = 0;
 382     }
 383     else
 384     {
 385         memcpy(irp->AssociatedIrp.SystemBuffer, &base->information, sizeof(HID_COLLECTION_INFORMATION));
 386         irp->IoStatus.Information = sizeof(HID_COLLECTION_INFORMATION);
 387         irp->IoStatus.u.Status = STATUS_SUCCESS;
 388     }
 389     return STATUS_SUCCESS;
 390 }
 391
 392 static NTSTATUS handle_IOCTL_HID_GET_COLLECTION_DESCRIPTOR(IRP *irp, BASE_DEVICE_EXTENSION *base)
 393 {
 394     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 395
 396     if (irpsp->Parameters.DeviceIoControl.OutputBufferLength <  base->preparseData->dwSize)
 397     {
 398         irp->IoStatus.u.Status = STATUS_INVALID_BUFFER_SIZE;
 399         irp->IoStatus.Information = 0;
 400     }
 401     else
 402     {
 403         memcpy(irp->UserBuffer, base->preparseData, base->preparseData->dwSize);
 404         irp->IoStatus.Information = base->preparseData->dwSize;
 405         irp->IoStatus.u.Status = STATUS_SUCCESS;
 406     }
 407     return STATUS_SUCCESS;
 408 }
 409
 410 static NTSTATUS handle_minidriver_string(DEVICE_OBJECT *device, IRP *irp, SHORT index)
 411 {
 412     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 413     WCHAR buffer[127];
 414     NTSTATUS status;
 415     ULONG InputBuffer;
 416
 417     InputBuffer = MAKELONG(index, 0);
 418     status = call_minidriver(IOCTL_HID_GET_STRING, device, ULongToPtr(InputBuffer), sizeof(InputBuffer), buffer, sizeof(buffer));
 419
 420     if (status == STATUS_SUCCESS)
 421     {
 422         WCHAR *out_buffer = (WCHAR*)(((BYTE*)irp->MdlAddress->StartVa) + irp->MdlAddress->ByteOffset);
 423         int length = irpsp->Parameters.DeviceIoControl.OutputBufferLength/sizeof(WCHAR);
 424         TRACE("got string %s from minidriver\n",debugstr_w(buffer));
 425         lstrcpynW(out_buffer, buffer, length);
 426         irp->IoStatus.Information = (lstrlenW(buffer)+1) * sizeof(WCHAR);
 427     }
 428     irp->IoStatus.u.Status = status;
 429
 430     return STATUS_SUCCESS;
 431 }
 432
 433 NTSTATUS WINAPI HID_Device_ioctl(DEVICE_OBJECT *device, IRP *irp)
 434 {
 435     NTSTATUS rc = STATUS_SUCCESS;
 436     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 437     BASE_DEVICE_EXTENSION *extension = device->DeviceExtension;
 438
 439     irp->IoStatus.Information = 0;
 440
 441     TRACE("device %p ioctl(%x)\n", device, irpsp->Parameters.DeviceIoControl.IoControlCode);
 442
 443     switch (irpsp->Parameters.DeviceIoControl.IoControlCode)
 444     {
 445         case IOCTL_HID_GET_POLL_FREQUENCY_MSEC:
 446             TRACE("IOCTL_HID_GET_POLL_FREQUENCY_MSEC\n");
 447             if (irpsp->Parameters.DeviceIoControl.OutputBufferLength < sizeof(ULONG))
 448             {
 449                 irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
 450                 irp->IoStatus.Information = 0;
 451                 break;
 452             }
 453             *((ULONG*)irp->AssociatedIrp.SystemBuffer) = extension->poll_interval;
 454             irp->IoStatus.Information = sizeof(ULONG);
 455             irp->IoStatus.u.Status = STATUS_SUCCESS;
 456             break;
 457         case IOCTL_HID_SET_POLL_FREQUENCY_MSEC:
 458         {
 459             ULONG poll_interval;
 460             TRACE("IOCTL_HID_SET_POLL_FREQUENCY_MSEC\n");
 461             if (irpsp->Parameters.DeviceIoControl.InputBufferLength < sizeof(ULONG))
 462             {
 463                 irp->IoStatus.u.Status = STATUS_BUFFER_TOO_SMALL;
 464                 break;
 465             }
 466             poll_interval = *(ULONG *)irp->AssociatedIrp.SystemBuffer;
 467             if (poll_interval == 0)
 468                 FIXME("Handle opportunistic reads\n");
 469             else if (poll_interval <= MAX_POLL_INTERVAL_MSEC)
 470             {
 471                 extension->poll_interval = poll_interval;
 472                 irp->IoStatus.u.Status = STATUS_SUCCESS;
 473             }
 474             else
 475                 irp->IoStatus.u.Status = STATUS_INVALID_PARAMETER;
 476             break;
 477         }
 478         case IOCTL_HID_GET_PRODUCT_STRING:
 479         {
 480             rc = handle_minidriver_string(device, irp, HID_STRING_ID_IPRODUCT);
 481             break;
 482         }
 483         case IOCTL_HID_GET_MANUFACTURER_STRING:
 484         {
 485             rc = handle_minidriver_string(device, irp, HID_STRING_ID_IMANUFACTURER);
 486             break;
 487         }
 488         case IOCTL_HID_GET_COLLECTION_INFORMATION:
 489         {
 490             rc = handle_IOCTL_HID_GET_COLLECTION_INFORMATION(irp, extension);
 491             break;
 492         }
 493         case IOCTL_HID_GET_COLLECTION_DESCRIPTOR:
 494         {
 495             rc = handle_IOCTL_HID_GET_COLLECTION_DESCRIPTOR(irp, extension);
 496             break;
 497         }
 498         case IOCTL_HID_GET_INPUT_REPORT:
 499         {
 500             HID_XFER_PACKET packet;
 501             BYTE* buffer = ((BYTE*)irp->MdlAddress->StartVa) + irp->MdlAddress->ByteOffset;
 502
 503             if (extension->preparseData->InputReports[0].reportID)
 504                 packet.reportId = buffer[0];
 505             else
 506                 packet.reportId = 0;
 507             packet.reportBuffer = buffer;
 508             packet.reportBufferLen = irpsp->Parameters.DeviceIoControl.OutputBufferLength;
 509
 510             call_minidriver(IOCTL_HID_GET_INPUT_REPORT, device, NULL, 0, &packet, sizeof(packet));
 511             irp->IoStatus.Information = packet.reportBufferLen;
 512             irp->IoStatus.u.Status = STATUS_SUCCESS;
 513             break;
 514         }
 515         default:
 516         {
 517             ULONG code = irpsp->Parameters.DeviceIoControl.IoControlCode;
 518             FIXME("Unsupported ioctl %x (device=%x access=%x func=%x method=%x)\n",
 519                   code, code >> 16, (code >> 14) & 3, (code >> 2) & 0xfff, code & 3);
 520             irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
 521             rc = STATUS_UNSUCCESSFUL;
 522             break;
 523         }
 524     }
 525
 526     if (rc != STATUS_PENDING)
 527         IoCompleteRequest( irp, IO_NO_INCREMENT );
 528
 529     return rc;
 530 }
 531
 532 NTSTATUS WINAPI HID_Device_read(DEVICE_OBJECT *device, IRP *irp)
 533 {
 534     HID_XFER_PACKET *packet;
 535     BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
 536     UINT buffer_size = RingBuffer_GetBufferSize(ext->ring_buffer);
 537     NTSTATUS rc = STATUS_SUCCESS;
 538     int ptr = -1;
 539
 540     packet = HeapAlloc(GetProcessHeap(), 0, buffer_size);
 541     ptr = PtrToUlong( irp->Tail.Overlay.OriginalFileObject->FsContext );
 542
 543     irp->IoStatus.Information = 0;
 544     RingBuffer_Read(ext->ring_buffer, ptr, packet, &buffer_size);
 545
 546     if (buffer_size)
 547     {
 548         IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 549         TRACE_(hid_report)("Got Packet %p %i\n", packet->reportBuffer, packet->reportBufferLen);
 550         if (irpsp->Parameters.Read.Length >= packet->reportBufferLen)
 551         {
 552             memcpy(irp->AssociatedIrp.SystemBuffer, packet->reportBuffer, packet->reportBufferLen);
 553             irp->IoStatus.Information = packet->reportBufferLen;
 554             irp->IoStatus.u.Status = STATUS_SUCCESS;
 555         }
 556         else
 557         {
 558             irp->IoStatus.Information = 0;
 559             irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
 560         }
 561         IoCompleteRequest( irp, IO_NO_INCREMENT );
 562     }
 563     else
 564     {
 565         TRACE_(hid_report)("Queue irp\n");
 566         InsertTailList(&ext->irp_queue, &irp->Tail.Overlay.ListEntry);
 567         rc = STATUS_PENDING;
 568     }
 569     HeapFree(GetProcessHeap(), 0, packet);
 570
 571     return rc;
 572 }
 573
 574 NTSTATUS WINAPI HID_Device_write(DEVICE_OBJECT *device, IRP *irp)
 575 {
 576     IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
 577
 578     irp->IoStatus.Information = 0;
 579
 580     TRACE("Buffer length %i\n", irpsp->Parameters.Write.Length);
 581
 582     FIXME("device %p\n", device);
 583
 584     irp->IoStatus.u.Status = STATUS_SUCCESS;
 585     IoCompleteRequest( irp, IO_NO_INCREMENT );
 586     return STATUS_SUCCESS;
 587 }
 588
 589 NTSTATUS WINAPI HID_Device_create(DEVICE_OBJECT *device, IRP *irp)
 590 {
 591     BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
 592
 593     TRACE("Open handle on device %p\n", device);
 594     irp->Tail.Overlay.OriginalFileObject->FsContext = UlongToPtr(RingBuffer_AddPointer(ext->ring_buffer));
 595     irp->IoStatus.u.Status = STATUS_SUCCESS;
 596     IoCompleteRequest( irp, IO_NO_INCREMENT );
 597     return STATUS_SUCCESS;
 598 }
 599
 600 NTSTATUS WINAPI HID_Device_close(DEVICE_OBJECT *device, IRP *irp)
 601 {
 602     BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
 603     int ptr = PtrToUlong(irp->Tail.Overlay.OriginalFileObject->FsContext);
 604     TRACE("Close handle on device %p\n", device);
 605     RingBuffer_RemovePointer(ext->ring_buffer, ptr);
 606     irp->IoStatus.u.Status = STATUS_SUCCESS;
 607     IoCompleteRequest( irp, IO_NO_INCREMENT );
 608     return STATUS_SUCCESS;
 609 }