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Sweden-Number/dlls/hidclass.sys/device.c

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/*
* HIDClass device functions
*
* Copyright (C) 2015 Aric Stewart
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#define NONAMELESSUNION
#include "hid.h"
#include "wine/unicode.h"
#include "winreg.h"
#include "winuser.h"
#include "setupapi.h"
#include "wine/debug.h"
#include "ddk/hidsdi.h"
#include "ddk/hidtypes.h"
#include "initguid.h"
#include "devguid.h"
WINE_DEFAULT_DEBUG_CHANNEL(hid);
WINE_DECLARE_DEBUG_CHANNEL(hid_report);
static const WCHAR device_name_fmtW[] = {'\\','D','e','v','i','c','e',
'\\','H','I','D','#','%','p','&','%','p',0};
static const WCHAR device_link_fmtW[] = {'\\','?','?','\\','%','s','#','%','s',0};
/* GUID_DEVINTERFACE_HID */
static const WCHAR class_guid[] = {'{','4','D','1','E','5','5','B','2',
'-','F','1','6','F','-','1','1','C','F','-','8','8','C','B','-','0','0',
'1','1','1','1','0','0','0','0','3','0','}',0};
NTSTATUS HID_CreateDevice(DEVICE_OBJECT *native_device, HID_MINIDRIVER_REGISTRATION *driver, DEVICE_OBJECT **device)
{
WCHAR dev_name[255];
UNICODE_STRING nameW;
NTSTATUS status;
BASE_DEVICE_EXTENSION *ext;
sprintfW(dev_name, device_name_fmtW, driver->DriverObject, native_device);
RtlInitUnicodeString( &nameW, dev_name );
TRACE("Create base hid device %s\n", debugstr_w(dev_name));
status = IoCreateDevice(driver->DriverObject, driver->DeviceExtensionSize + sizeof(BASE_DEVICE_EXTENSION), &nameW, 0, 0, FALSE, device);
if (status)
{
FIXME( "failed to create device error %x\n", status );
return status;
}
ext = (*device)->DeviceExtension;
ext->deviceExtension.MiniDeviceExtension = ext + 1;
ext->deviceExtension.PhysicalDeviceObject = *device;
ext->deviceExtension.NextDeviceObject = native_device;
ext->device_name = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(dev_name) + 1) * sizeof(WCHAR));
lstrcpyW(ext->device_name, dev_name);
ext->link_name = NULL;
IoAttachDeviceToDeviceStack(*device, native_device);
return STATUS_SUCCESS;
}
NTSTATUS HID_LinkDevice(DEVICE_OBJECT *device)
{
WCHAR dev_link[255];
WCHAR *ptr;
SP_DEVINFO_DATA Data;
UNICODE_STRING nameW, linkW;
NTSTATUS status;
HDEVINFO devinfo;
GUID hidGuid;
BASE_DEVICE_EXTENSION *ext;
HidD_GetHidGuid(&hidGuid);
ext = device->DeviceExtension;
sprintfW(dev_link, device_link_fmtW, ext->instance_id, class_guid);
ptr = dev_link + 4;
do { if (*ptr == '\\') *ptr = '#'; } while (*ptr++);
struprW(dev_link);
RtlInitUnicodeString( &nameW, ext->device_name);
RtlInitUnicodeString( &linkW, dev_link );
TRACE("Create link %s\n", debugstr_w(dev_link));
ext->link_name = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR) * (lstrlenW(dev_link) + 1));
lstrcpyW(ext->link_name, dev_link);
status = IoCreateSymbolicLink( &linkW, &nameW );
if (status)
{
FIXME( "failed to create link error %x\n", status );
return status;
}
devinfo = SetupDiGetClassDevsW(&GUID_DEVCLASS_HIDCLASS, NULL, NULL, DIGCF_DEVICEINTERFACE);
if (!devinfo)
{
FIXME( "failed to get ClassDevs %x\n", GetLastError());
return STATUS_UNSUCCESSFUL;
}
Data.cbSize = sizeof(Data);
if (!SetupDiCreateDeviceInfoW(devinfo, ext->instance_id, &GUID_DEVCLASS_HIDCLASS, NULL, NULL, DICD_INHERIT_CLASSDRVS, &Data))
{
if (GetLastError() == ERROR_DEVINST_ALREADY_EXISTS)
{
SetupDiDestroyDeviceInfoList(devinfo);
return STATUS_SUCCESS;
}
FIXME( "failed to Create Device Info %x\n", GetLastError());
goto error;
}
if (!SetupDiRegisterDeviceInfo( devinfo, &Data, 0, NULL, NULL, NULL ))
{
FIXME( "failed to Register Device Info %x\n", GetLastError());
goto error;
}
if (!SetupDiCreateDeviceInterfaceW( devinfo, &Data, &hidGuid, NULL, 0, NULL))
{
FIXME( "failed to Create Device Interface %x\n", GetLastError());
goto error;
}
SetupDiDestroyDeviceInfoList(devinfo);
return STATUS_SUCCESS;
error:
SetupDiDestroyDeviceInfoList(devinfo);
return STATUS_UNSUCCESSFUL;
}
void HID_DeleteDevice(HID_MINIDRIVER_REGISTRATION *driver, DEVICE_OBJECT *device)
{
NTSTATUS status;
BASE_DEVICE_EXTENSION *ext;
UNICODE_STRING linkW;
LIST_ENTRY *entry;
IRP *irp;
ext = device->DeviceExtension;
if (ext->link_name)
{
TRACE("Delete link %s\n", debugstr_w(ext->link_name));
RtlInitUnicodeString(&linkW, ext->link_name);
status = IoDeleteSymbolicLink(&linkW);
if (status != STATUS_SUCCESS)
ERR("Delete Symbolic Link failed (%x)\n",status);
}
if (ext->thread)
{
SetEvent(ext->halt_event);
WaitForSingleObject(ext->thread, INFINITE);
}
CloseHandle(ext->halt_event);
HeapFree(GetProcessHeap(), 0, ext->preparseData);
if (ext->ring_buffer)
RingBuffer_Destroy(ext->ring_buffer);
entry = RemoveHeadList(&ext->irp_queue);
while(entry != &ext->irp_queue)
{
irp = CONTAINING_RECORD(entry, IRP, Tail.Overlay.ListEntry);
irp->IoStatus.u.Status = STATUS_DEVICE_REMOVED;
IoCompleteRequest(irp, IO_NO_INCREMENT);
entry = RemoveHeadList(&ext->irp_queue);
}
TRACE("Delete device(%p) %s\n", device, debugstr_w(ext->device_name));
HeapFree(GetProcessHeap(), 0, ext->device_name);
HeapFree(GetProcessHeap(), 0, ext->link_name);
IoDeleteDevice(device);
}
static void HID_Device_processQueue(DEVICE_OBJECT *device)
{
LIST_ENTRY *entry;
IRP *irp;
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
UINT buffer_size = RingBuffer_GetBufferSize(ext->ring_buffer);
HID_XFER_PACKET *packet;
packet = HeapAlloc(GetProcessHeap(), 0, buffer_size);
entry = RemoveHeadList(&ext->irp_queue);
while(entry != &ext->irp_queue)
{
int ptr;
irp = CONTAINING_RECORD(entry, IRP, Tail.Overlay.ListEntry);
ptr = PtrToUlong( irp->Tail.Overlay.OriginalFileObject->FsContext );
RingBuffer_Read(ext->ring_buffer, ptr, packet, &buffer_size);
if (buffer_size)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation(irp);
TRACE_(hid_report)("Processing Request (%i)\n",ptr);
if (irpsp->Parameters.Read.Length >= packet->reportBufferLen)
{
memcpy(irp->AssociatedIrp.SystemBuffer, packet->reportBuffer, packet->reportBufferLen);
irp->IoStatus.Information = packet->reportBufferLen;
irp->IoStatus.u.Status = STATUS_SUCCESS;
}
else
{
irp->IoStatus.Information = 0;
irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
}
}
else
{
irp->IoStatus.Information = 0;
irp->IoStatus.u.Status = STATUS_UNSUCCESSFUL;
}
IoCompleteRequest( irp, IO_NO_INCREMENT );
entry = RemoveHeadList(&ext->irp_queue);
}
HeapFree(GetProcessHeap(), 0, packet);
}
static NTSTATUS WINAPI read_Completion(DEVICE_OBJECT *deviceObject, IRP *irp, void *context)
{
HANDLE event = context;
SetEvent(event);
return STATUS_MORE_PROCESSING_REQUIRED;
}
static DWORD CALLBACK hid_device_thread(void *args)
{
DEVICE_OBJECT *device = (DEVICE_OBJECT*)args;
IRP *irp;
IO_STATUS_BLOCK irp_status;
DWORD rc;
HANDLE events[2];
NTSTATUS ntrc;
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
events[0] = CreateEventA(NULL, TRUE, FALSE, NULL);
events[1] = ext->halt_event;
if (ext->information.Polled)
{
while(1)
{
HID_XFER_PACKET *packet;
ResetEvent(events[0]);
packet = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*packet) + ext->preparseData->caps.InputReportByteLength);
packet->reportBufferLen = ext->preparseData->caps.InputReportByteLength;
packet->reportBuffer = ((BYTE*)packet) + sizeof(*packet);
packet->reportId = 0;
irp = IoBuildDeviceIoControlRequest(IOCTL_HID_GET_INPUT_REPORT,
device, NULL, 0, packet, sizeof(*packet), TRUE, NULL,
&irp_status);
IoSetCompletionRoutine(irp, read_Completion, events[0], TRUE, TRUE, TRUE);
ntrc = IoCallDriver(device, irp);
if (ntrc == STATUS_PENDING)
WaitForMultipleObjects(2, events, FALSE, INFINITE);
if (irp->IoStatus.u.Status == STATUS_SUCCESS)
{
RingBuffer_Write(ext->ring_buffer, packet);
HID_Device_processQueue(device);
}
IoCompleteRequest(irp, IO_NO_INCREMENT );
rc = WaitForSingleObject(ext->halt_event, ext->poll_interval);
if (rc == WAIT_OBJECT_0)
break;
else if (rc != WAIT_TIMEOUT)
ERR("Wait returned unexpected value %x\n",rc);
}
}
else
{
INT exit_now = FALSE;
HID_XFER_PACKET *packet;
packet = HeapAlloc(GetProcessHeap(), 0, sizeof(*packet) + ext->preparseData->caps.InputReportByteLength);
packet->reportBufferLen = ext->preparseData->caps.InputReportByteLength;
packet->reportBuffer = ((BYTE*)packet) + sizeof(*packet);
packet->reportId = 0;
while(1)
{
BYTE *buffer;
buffer = HeapAlloc(GetProcessHeap(), 0, ext->preparseData->caps.InputReportByteLength);
ResetEvent(events[0]);
irp = IoBuildDeviceIoControlRequest(IOCTL_HID_READ_REPORT,
device, NULL, 0, buffer,
ext->preparseData->caps.InputReportByteLength, TRUE, NULL,
&irp_status);
IoSetCompletionRoutine(irp, read_Completion, events[0], TRUE, TRUE, TRUE);
ntrc = IoCallDriver(device, irp);
if (ntrc == STATUS_PENDING)
{
WaitForMultipleObjects(2, events, FALSE, INFINITE);
}
rc = WaitForSingleObject(ext->halt_event, 0);
if (rc == WAIT_OBJECT_0)
exit_now = TRUE;
if (!exit_now && irp->IoStatus.u.Status == STATUS_SUCCESS)
{
packet->reportId = buffer[0];
memcpy(packet->reportBuffer, buffer, ext->preparseData->caps.InputReportByteLength);
RingBuffer_Write(ext->ring_buffer, packet);
HID_Device_processQueue(device);
}
IoCompleteRequest(irp, IO_NO_INCREMENT );
if (exit_now)
break;
}
HeapFree(GetProcessHeap(), 0, packet);
}
CloseHandle(events[0]);
TRACE("Device thread exiting\n");
return 1;
}
void HID_StartDeviceThread(DEVICE_OBJECT *device)
{
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
ext->halt_event = CreateEventA(NULL, TRUE, FALSE, NULL);
ext->thread = CreateThread(NULL, 0, hid_device_thread, device, 0, NULL);
}
static NTSTATUS handle_IOCTL_HID_GET_COLLECTION_INFORMATION(IRP *irp, BASE_DEVICE_EXTENSION *base)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
if (irpsp->Parameters.DeviceIoControl.OutputBufferLength < sizeof(HID_COLLECTION_INFORMATION))
{
irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
irp->IoStatus.Information = 0;
}
else
{
memcpy(irp->AssociatedIrp.SystemBuffer, &base->information, sizeof(HID_COLLECTION_INFORMATION));
irp->IoStatus.Information = sizeof(HID_COLLECTION_INFORMATION);
irp->IoStatus.u.Status = STATUS_SUCCESS;
}
return STATUS_SUCCESS;
}
static NTSTATUS handle_IOCTL_HID_GET_COLLECTION_DESCRIPTOR(IRP *irp, BASE_DEVICE_EXTENSION *base)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
if (irpsp->Parameters.DeviceIoControl.OutputBufferLength < base->preparseData->dwSize)
{
irp->IoStatus.u.Status = STATUS_INVALID_BUFFER_SIZE;
irp->IoStatus.Information = 0;
}
else
{
memcpy(irp->UserBuffer, base->preparseData, base->preparseData->dwSize);
irp->IoStatus.Information = base->preparseData->dwSize;
irp->IoStatus.u.Status = STATUS_SUCCESS;
}
return STATUS_SUCCESS;
}
static NTSTATUS handle_minidriver_string(DEVICE_OBJECT *device, IRP *irp, SHORT index)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
WCHAR buffer[127];
NTSTATUS status;
ULONG InputBuffer;
InputBuffer = MAKELONG(index, 0);
status = call_minidriver(IOCTL_HID_GET_STRING, device, ULongToPtr(InputBuffer), sizeof(InputBuffer), buffer, sizeof(buffer));
if (status == STATUS_SUCCESS)
{
WCHAR *out_buffer = MmGetSystemAddressForMdlSafe(irp->MdlAddress, NormalPagePriority);
int length = irpsp->Parameters.DeviceIoControl.OutputBufferLength/sizeof(WCHAR);
TRACE("got string %s from minidriver\n",debugstr_w(buffer));
lstrcpynW(out_buffer, buffer, length);
irp->IoStatus.Information = (lstrlenW(buffer)+1) * sizeof(WCHAR);
}
irp->IoStatus.u.Status = status;
return STATUS_SUCCESS;
}
static NTSTATUS HID_get_feature(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
HID_XFER_PACKET *packet;
DWORD len;
NTSTATUS rc = STATUS_SUCCESS;
BYTE *out_buffer;
irp->IoStatus.Information = 0;
out_buffer = MmGetSystemAddressForMdlSafe(irp->MdlAddress, NormalPagePriority);
TRACE_(hid_report)("Device %p Buffer length %i Buffer %p\n", device, irpsp->Parameters.DeviceIoControl.OutputBufferLength, out_buffer);
len = sizeof(*packet) + irpsp->Parameters.DeviceIoControl.OutputBufferLength;
packet = HeapAlloc(GetProcessHeap(), 0, len);
packet->reportBufferLen = irpsp->Parameters.DeviceIoControl.OutputBufferLength;
packet->reportBuffer = ((BYTE*)packet) + sizeof(*packet);
packet->reportId = out_buffer[0];
TRACE_(hid_report)("(id %i, len %i buffer %p)\n", packet->reportId, packet->reportBufferLen, packet->reportBuffer);
rc = call_minidriver(IOCTL_HID_GET_FEATURE, device, NULL, 0, packet, sizeof(*packet));
irp->IoStatus.u.Status = rc;
if (irp->IoStatus.u.Status == STATUS_SUCCESS)
{
irp->IoStatus.Information = packet->reportBufferLen;
memcpy(out_buffer, packet->reportBuffer, packet->reportBufferLen);
}
else
irp->IoStatus.Information = 0;
TRACE_(hid_report)("Result 0x%x get %li bytes\n", rc, irp->IoStatus.Information);
HeapFree(GetProcessHeap(), 0, packet);
return rc;
}
static NTSTATUS HID_set_feature(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
HID_XFER_PACKET packet;
NTSTATUS rc;
irp->IoStatus.Information = 0;
TRACE_(hid_report)("Device %p Buffer length %i Buffer %p\n", device, irpsp->Parameters.DeviceIoControl.InputBufferLength, irp->AssociatedIrp.SystemBuffer);
packet.reportBuffer = irp->AssociatedIrp.SystemBuffer;
packet.reportId = ((char*)irp->AssociatedIrp.SystemBuffer)[0];
packet.reportBufferLen = irpsp->Parameters.DeviceIoControl.InputBufferLength;
TRACE_(hid_report)("(id %i, len %i buffer %p)\n", packet.reportId, packet.reportBufferLen, packet.reportBuffer);
rc = call_minidriver(IOCTL_HID_SET_FEATURE, device, &packet, sizeof(packet), NULL, 0);
irp->IoStatus.u.Status = rc;
if (irp->IoStatus.u.Status == STATUS_SUCCESS)
irp->IoStatus.Information = irpsp->Parameters.DeviceIoControl.InputBufferLength;
else
irp->IoStatus.Information = 0;
TRACE_(hid_report)("Result 0x%x set %li bytes\n", rc, irp->IoStatus.Information);
return rc;
}
NTSTATUS WINAPI HID_Device_ioctl(DEVICE_OBJECT *device, IRP *irp)
{
NTSTATUS rc = STATUS_SUCCESS;
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
BASE_DEVICE_EXTENSION *extension = device->DeviceExtension;
irp->IoStatus.Information = 0;
TRACE("device %p ioctl(%x)\n", device, irpsp->Parameters.DeviceIoControl.IoControlCode);
switch (irpsp->Parameters.DeviceIoControl.IoControlCode)
{
case IOCTL_HID_GET_POLL_FREQUENCY_MSEC:
TRACE("IOCTL_HID_GET_POLL_FREQUENCY_MSEC\n");
if (irpsp->Parameters.DeviceIoControl.OutputBufferLength < sizeof(ULONG))
{
irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
irp->IoStatus.Information = 0;
break;
}
*((ULONG*)irp->AssociatedIrp.SystemBuffer) = extension->poll_interval;
irp->IoStatus.Information = sizeof(ULONG);
irp->IoStatus.u.Status = STATUS_SUCCESS;
break;
case IOCTL_HID_SET_POLL_FREQUENCY_MSEC:
{
ULONG poll_interval;
TRACE("IOCTL_HID_SET_POLL_FREQUENCY_MSEC\n");
if (irpsp->Parameters.DeviceIoControl.InputBufferLength < sizeof(ULONG))
{
irp->IoStatus.u.Status = STATUS_BUFFER_TOO_SMALL;
break;
}
poll_interval = *(ULONG *)irp->AssociatedIrp.SystemBuffer;
if (poll_interval == 0)
FIXME("Handle opportunistic reads\n");
else if (poll_interval <= MAX_POLL_INTERVAL_MSEC)
{
extension->poll_interval = poll_interval;
irp->IoStatus.u.Status = STATUS_SUCCESS;
}
else
irp->IoStatus.u.Status = STATUS_INVALID_PARAMETER;
break;
}
case IOCTL_HID_GET_PRODUCT_STRING:
{
rc = handle_minidriver_string(device, irp, HID_STRING_ID_IPRODUCT);
break;
}
case IOCTL_HID_GET_SERIALNUMBER_STRING:
{
rc = handle_minidriver_string(device, irp, HID_STRING_ID_ISERIALNUMBER);
break;
}
case IOCTL_HID_GET_MANUFACTURER_STRING:
{
rc = handle_minidriver_string(device, irp, HID_STRING_ID_IMANUFACTURER);
break;
}
case IOCTL_HID_GET_COLLECTION_INFORMATION:
{
rc = handle_IOCTL_HID_GET_COLLECTION_INFORMATION(irp, extension);
break;
}
case IOCTL_HID_GET_COLLECTION_DESCRIPTOR:
{
rc = handle_IOCTL_HID_GET_COLLECTION_DESCRIPTOR(irp, extension);
break;
}
case IOCTL_HID_GET_INPUT_REPORT:
{
HID_XFER_PACKET packet;
BYTE *buffer = MmGetSystemAddressForMdlSafe(irp->MdlAddress, NormalPagePriority);
if (extension->preparseData->InputReports[0].reportID)
packet.reportId = buffer[0];
else
packet.reportId = 0;
packet.reportBuffer = buffer;
packet.reportBufferLen = irpsp->Parameters.DeviceIoControl.OutputBufferLength;
call_minidriver(IOCTL_HID_GET_INPUT_REPORT, device, NULL, 0, &packet, sizeof(packet));
irp->IoStatus.Information = packet.reportBufferLen;
irp->IoStatus.u.Status = STATUS_SUCCESS;
break;
}
case IOCTL_SET_NUM_DEVICE_INPUT_BUFFERS:
{
irp->IoStatus.Information = 0;
if (irpsp->Parameters.DeviceIoControl.InputBufferLength != sizeof(ULONG))
{
irp->IoStatus.u.Status = rc = STATUS_BUFFER_OVERFLOW;
}
else
{
rc = RingBuffer_SetSize(extension->ring_buffer, *(ULONG*)irp->AssociatedIrp.SystemBuffer);
irp->IoStatus.u.Status = rc;
}
break;
}
case IOCTL_GET_NUM_DEVICE_INPUT_BUFFERS:
{
if (irpsp->Parameters.DeviceIoControl.OutputBufferLength < sizeof(ULONG))
{
irp->IoStatus.u.Status = rc = STATUS_BUFFER_TOO_SMALL;
}
else
{
*(ULONG*)irp->AssociatedIrp.SystemBuffer = RingBuffer_GetSize(extension->ring_buffer);
rc = irp->IoStatus.u.Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_HID_GET_FEATURE:
rc = HID_get_feature(device, irp);
break;
case IOCTL_HID_SET_FEATURE:
rc = HID_set_feature(device, irp);
break;
default:
{
ULONG code = irpsp->Parameters.DeviceIoControl.IoControlCode;
FIXME("Unsupported ioctl %x (device=%x access=%x func=%x method=%x)\n",
code, code >> 16, (code >> 14) & 3, (code >> 2) & 0xfff, code & 3);
irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
rc = STATUS_UNSUCCESSFUL;
break;
}
}
if (rc != STATUS_PENDING)
IoCompleteRequest( irp, IO_NO_INCREMENT );
return rc;
}
NTSTATUS WINAPI HID_Device_read(DEVICE_OBJECT *device, IRP *irp)
{
HID_XFER_PACKET *packet;
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
UINT buffer_size = RingBuffer_GetBufferSize(ext->ring_buffer);
NTSTATUS rc = STATUS_SUCCESS;
int ptr = -1;
packet = HeapAlloc(GetProcessHeap(), 0, buffer_size);
ptr = PtrToUlong( irp->Tail.Overlay.OriginalFileObject->FsContext );
irp->IoStatus.Information = 0;
RingBuffer_Read(ext->ring_buffer, ptr, packet, &buffer_size);
if (buffer_size)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
TRACE_(hid_report)("Got Packet %p %i\n", packet->reportBuffer, packet->reportBufferLen);
if (irpsp->Parameters.Read.Length >= packet->reportBufferLen)
{
memcpy(irp->AssociatedIrp.SystemBuffer, packet->reportBuffer, packet->reportBufferLen);
irp->IoStatus.Information = packet->reportBufferLen;
irp->IoStatus.u.Status = STATUS_SUCCESS;
}
else
{
irp->IoStatus.Information = 0;
irp->IoStatus.u.Status = STATUS_BUFFER_OVERFLOW;
}
IoCompleteRequest( irp, IO_NO_INCREMENT );
}
else
{
TRACE_(hid_report)("Queue irp\n");
InsertTailList(&ext->irp_queue, &irp->Tail.Overlay.ListEntry);
rc = STATUS_PENDING;
}
HeapFree(GetProcessHeap(), 0, packet);
return rc;
}
NTSTATUS WINAPI HID_Device_write(DEVICE_OBJECT *device, IRP *irp)
{
IO_STACK_LOCATION *irpsp = IoGetCurrentIrpStackLocation( irp );
HID_XFER_PACKET packet;
NTSTATUS rc;
irp->IoStatus.Information = 0;
TRACE_(hid_report)("Device %p Buffer length %i Buffer %p\n", device, irpsp->Parameters.Write.Length, irp->AssociatedIrp.SystemBuffer);
packet.reportBuffer = irp->AssociatedIrp.SystemBuffer;
packet.reportId = ((char*)irp->AssociatedIrp.SystemBuffer)[0];
packet.reportBufferLen = irpsp->Parameters.Write.Length;
TRACE_(hid_report)("(id %i, len %i buffer %p)\n", packet.reportId, packet.reportBufferLen, packet.reportBuffer);
rc = call_minidriver(IOCTL_HID_WRITE_REPORT, device, NULL, 0, &packet, sizeof(packet));
irp->IoStatus.u.Status = rc;
if (irp->IoStatus.u.Status == STATUS_SUCCESS)
irp->IoStatus.Information = irpsp->Parameters.Write.Length;
else
irp->IoStatus.Information = 0;
TRACE_(hid_report)("Result 0x%x wrote %li bytes\n", rc, irp->IoStatus.Information);
IoCompleteRequest( irp, IO_NO_INCREMENT );
return rc;
}
NTSTATUS WINAPI HID_Device_create(DEVICE_OBJECT *device, IRP *irp)
{
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
TRACE("Open handle on device %p\n", device);
irp->Tail.Overlay.OriginalFileObject->FsContext = UlongToPtr(RingBuffer_AddPointer(ext->ring_buffer));
irp->IoStatus.u.Status = STATUS_SUCCESS;
IoCompleteRequest( irp, IO_NO_INCREMENT );
return STATUS_SUCCESS;
}
NTSTATUS WINAPI HID_Device_close(DEVICE_OBJECT *device, IRP *irp)
{
BASE_DEVICE_EXTENSION *ext = device->DeviceExtension;
int ptr = PtrToUlong(irp->Tail.Overlay.OriginalFileObject->FsContext);
TRACE("Close handle on device %p\n", device);
RingBuffer_RemovePointer(ext->ring_buffer, ptr);
irp->IoStatus.u.Status = STATUS_SUCCESS;
IoCompleteRequest( irp, IO_NO_INCREMENT );
return STATUS_SUCCESS;
}
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