DrvHostParallel.cpp@ 43458

Last change on this file since 43458 was 43458, checked in by vboxsync, 12 years ago
Devices/Parallel: reverted all the extra debug logs that were added to debug the user parallel port issue. The problem has been fixed.
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File size: 36.0 KB

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1	/* $Id: DrvHostParallel.cpp 43458 2012-09-28 06:52:23Z vboxsync $ */
2	/** @file
3	* VirtualBox Host Parallel Port Driver.
4	*
5	* Initial Linux-only code contributed by: Alexander Eichner
6	*/
7
8	/*
9	* Copyright (C) 2006-2012 Oracle Corporation
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.virtualbox.org. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*/
19
20	/*******************************************************************************
21	* Header Files *
22	*******************************************************************************/
23	#define LOG_GROUP LOG_GROUP_DRV_HOST_PARALLEL
24	#include <VBox/vmm/pdmdrv.h>
25	#include <VBox/vmm/pdmthread.h>
26	#include <iprt/asm.h>
27	#include <iprt/assert.h>
28	#include <iprt/file.h>
29	#include <iprt/pipe.h>
30	#include <iprt/semaphore.h>
31	#include <iprt/stream.h>
32	#include <iprt/uuid.h>
33	#include <iprt/cdefs.h>
34	#include <iprt/ctype.h>
35
36	#ifdef RT_OS_LINUX
37	# include <sys/ioctl.h>
38	# include <sys/types.h>
39	# include <sys/stat.h>
40	# include <sys/poll.h>
41	# include <fcntl.h>
42	# include <unistd.h>
43	# include <linux/ppdev.h>
44	# include <linux/parport.h>
45	# include <errno.h>
46	#endif
47
48	/** @def VBOX_WITH_WIN_PARPORT_SUP *
49	* Indicates whether to use the generic direct hardware access or host specific
50	* code to access the parallel port.
51	*/
52	#if defined(RT_OS_LINUX)
53	# undef VBOX_WITH_WIN_PARPORT_SUP
54	#elif defined(RT_OS_WINDOWS)
55	#else
56	# error "Not ported"
57	#endif
58
59	#if defined(VBOX_WITH_WIN_PARPORT_SUP) && defined(IN_RING0)
60	# include <iprt/asm-amd64-x86.h>
61	#endif
62
63	#if defined(VBOX_WITH_WIN_PARPORT_SUP) && defined(IN_RING3)
64	# include <Windows.h>
65	# include <setupapi.h>
66	# include <cfgmgr32.h>
67	# include <iprt/mem.h>
68	# include <iprt/string.h>
69	#endif
70
71	#include "VBoxDD.h"
72
73
74	/*******************************************************************************
75	* Structures and Typedefs *
76	*******************************************************************************/
77	/**
78	* Host parallel port driver instance data.
79	* @implements PDMIHOSTPARALLELCONNECTOR
80	*/
81	typedef struct DRVHOSTPARALLEL
82	{
83	/** Pointer to the driver instance structure. */
84	PPDMDRVINS pDrvIns;
85	/** Pointer to the driver instance. */
86	PPDMDRVINSR3 pDrvInsR3;
87	PPDMDRVINSR0 pDrvInsR0;
88	/** Pointer to the char port interface of the driver/device above us. */
89	PPDMIHOSTPARALLELPORT pDrvHostParallelPort;
90	/** Our host device interface. */
91	PDMIHOSTPARALLELCONNECTOR IHostParallelConnector;
92	/** Our host device interface. */
93	PDMIHOSTPARALLELCONNECTOR IHostParallelConnectorR3;
94	/** Device Path */
95	char *pszDevicePath;
96	/** Device Handle */
97	RTFILE hFileDevice;
98	#ifndef VBOX_WITH_WIN_PARPORT_SUP
99	/** Thread waiting for interrupts. */
100	PPDMTHREAD pMonitorThread;
101	/** Wakeup pipe read end. */
102	RTPIPE hWakeupPipeR;
103	/** Wakeup pipe write end. */
104	RTPIPE hWakeupPipeW;
105	/** Current mode the parallel port is in. */
106	PDMPARALLELPORTMODE enmModeCur;
107	#endif
108
109	#ifdef VBOX_WITH_WIN_PARPORT_SUP
110	/** Data register. */
111	uint32_t u32LptAddr;
112	/** Status register. */
113	uint32_t u32LptAddrStatus;
114	/** Control register. */
115	uint32_t u32LptAddrControl;
116	/** Data read buffer. */
117	uint8_t u8ReadIn;
118	/** Control read buffer. */
119	uint8_t u8ReadInControl;
120	/** Status read buffer. */
121	uint8_t u8ReadInStatus;
122	/** Parallel port name */
123	char szParportName[6];
124	/** Whether the parallel port is available or not. */
125	bool fParportAvail;
126	/** Device Handle */
127	RTFILE hWinFileDevice;
128	#endif /* VBOX_WITH_WIN_PARPORT_SUP */
129	} DRVHOSTPARALLEL, *PDRVHOSTPARALLEL;
130
131
132	/**
133	* Ring-0 operations.
134	*/
135	typedef enum DRVHOSTPARALLELR0OP
136	{
137	/** Invalid zero value. */
138	DRVHOSTPARALLELR0OP_INVALID = 0,
139	/** Perform R0 initialization. */
140	DRVHOSTPARALLELR0OP_INITR0STUFF,
141	/** Read data. */
142	DRVHOSTPARALLELR0OP_READ,
143	/** Read status register. */
144	DRVHOSTPARALLELR0OP_READSTATUS,
145	/** Read control register. */
146	DRVHOSTPARALLELR0OP_READCONTROL,
147	/** Write data. */
148	DRVHOSTPARALLELR0OP_WRITE,
149	/** Write control register. */
150	DRVHOSTPARALLELR0OP_WRITECONTROL,
151	/** Set port direction. */
152	DRVHOSTPARALLELR0OP_SETPORTDIRECTION
153	} DRVHOSTPARALLELR0OP;
154
155	/** Converts a pointer to DRVHOSTPARALLEL::IHostDeviceConnector to a PDRHOSTPARALLEL. */
156	#define PDMIHOSTPARALLELCONNECTOR_2_DRVHOSTPARALLEL(pInterface) ( (PDRVHOSTPARALLEL)((uintptr_t)pInterface - RT_OFFSETOF(DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector))) )
157
158
159	/*******************************************************************************
160	* Defined Constants And Macros *
161	*******************************************************************************/
162	#define CTRL_REG_OFFSET 2
163	#define STATUS_REG_OFFSET 1
164	#define LPT_CONTROL_ENABLE_BIDIRECT 0x20
165
166
167
168	#ifdef VBOX_WITH_WIN_PARPORT_SUP
169	# ifdef IN_RING0
170
171	/**
172	* R0 mode function to write byte value to data port.
173	* @returns VBox status code.
174	* @param pDrvIns Driver instance.
175	* @param u64Arg Data to be written to data register.
176	*
177	*/
178	static int drvR0HostParallelReqWrite(PPDMDRVINS pDrvIns, uint64_t u64Arg)
179	{
180	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
181	LogFlowFunc(("write to data port=%#x val=%#x\n", pThis->u32LptAddr, u64Arg));
182	ASMOutU8(pThis->u32LptAddr, (uint8_t)(u64Arg));
183	return VINF_SUCCESS;
184	}
185
186	/**
187	* R0 mode function to write byte value to parallel port control
188	* register.
189	* @returns VBox status code.
190	* @param pDrvIns Driver instance.
191	* @param u64Arg Data to be written to control register.
192	*/
193	static int drvR0HostParallelReqWriteControl(PPDMDRVINS pDrvIns, uint64_t u64Arg)
194	{
195	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
196	LogFlowFunc(("write to ctrl port=%#x val=%#x\n", pThis->u32LptAddrControl, u64Arg));
197	ASMOutU8(pThis->u32LptAddrControl, (uint8_t)(u64Arg));
198	return VINF_SUCCESS;
199	}
200
201	/**
202	* R0 mode function to ready byte value from the parallel port
203	* data register
204	* @returns VBox status code.
205	* @param pDrvIns Driver instance.
206	* @param u64Arg Not used.
207	*/
208	static int drvR0HostParallelReqRead(PPDMDRVINS pDrvIns, uint64_t u64Arg)
209	{
210	uint8_t u8Data;
211	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
212	u8Data = ASMInU8(pThis->u32LptAddr);
213	LogFlowFunc(("read from data port=%#x val=%#x\n", pThis->u32LptAddr, u8Data));
214	pThis->u8ReadIn = u8Data;
215	return VINF_SUCCESS;
216	}
217
218	/**
219	* R0 mode function to ready byte value from the parallel port
220	* control register.
221	* @returns VBox status code.
222	* @param pDrvIns Driver instance.
223	* @param u64Arg Not used.
224	*/
225	static int drvR0HostParallelReqReadControl(PPDMDRVINS pDrvIns, uint64_t u64Arg)
226	{
227	uint8_t u8Data;
228	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
229	u8Data = ASMInU8(pThis->u32LptAddrControl);
230	LogFlowFunc(("read from ctrl port=%#x val=%#x\n", pThis->u32LptAddr, u8Data));
231	pThis->u8ReadInControl = u8Data;
232	return VINF_SUCCESS;
233	}
234
235	/**
236	* R0 mode function to ready byte value from the parallel port
237	* status register.
238	* @returns VBox status code.
239	* @param pDrvIns Driver instance.
240	* @param u64Arg Not used.
241	*/
242	static int drvR0HostParallelReqReadStatus(PPDMDRVINS pDrvIns, uint64_t u64Arg)
243	{
244	uint8_t u8Data;
245	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
246	u8Data = ASMInU8(pThis->u32LptAddrStatus);
247	LogFlowFunc(("read from status port=%#x val=%#x\n", pThis->u32LptAddr, u8Data));
248	pThis->u8ReadInStatus = u8Data;
249	return VINF_SUCCESS;
250	}
251
252	/**
253	* R0 mode function to set the direction of parallel port -
254	* operate in bidirectional mode or single direction.
255	* @returns VBox status code.
256	* @param pDrvIns Driver instance.
257	* @param u64Arg Mode.
258	*/
259	static int drvR0HostParallelReqSetPortDir(PPDMDRVINS pDrvIns, uint64_t u64Arg)
260	{
261	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
262	uint8_t u8ReadControlVal;
263	uint8_t u8WriteControlVal;
264
265	if (u64Arg)
266	{
267	u8ReadControlVal = ASMInU8(pThis->u32LptAddrControl);
268	u8WriteControlVal = u8ReadControlVal \| LPT_CONTROL_ENABLE_BIDIRECT; /* enable input direction */
269	ASMOutU8(pThis->u32LptAddrControl, u8WriteControlVal);
270	}
271	else
272	{
273	u8ReadControlVal = ASMInU8(pThis->u32LptAddrControl);
274	u8WriteControlVal = u8ReadControlVal & ~LPT_CONTROL_ENABLE_BIDIRECT; /* disable input direction */
275	ASMOutU8(pThis->u32LptAddrControl, u8WriteControlVal);
276	}
277	return VINF_SUCCESS;
278	}
279
280	/**
281	* @interface_method_impl{FNPDMDRVREQHANDLERR0}
282	*/
283	PDMBOTHCBDECL(int) drvR0HostParallelReqHandler(PPDMDRVINS pDrvIns, uint32_t uOperation, uint64_t u64Arg)
284	{
285	int rc;
286
287	LogFlowFuncEnter();
288	/* I have included break after each case. Need to work on this. */
289	switch ((DRVHOSTPARALLELR0OP)uOperation)
290	{
291	case DRVHOSTPARALLELR0OP_READ:
292	rc = drvR0HostParallelReqRead(pDrvIns, u64Arg);
293	break;
294	case DRVHOSTPARALLELR0OP_READSTATUS:
295	rc = drvR0HostParallelReqReadStatus(pDrvIns, u64Arg);
296	break;
297	case DRVHOSTPARALLELR0OP_READCONTROL:
298	rc = drvR0HostParallelReqReadControl(pDrvIns, u64Arg);
299	break;
300	case DRVHOSTPARALLELR0OP_WRITE:
301	rc = drvR0HostParallelReqWrite(pDrvIns, u64Arg);
302	break;
303	case DRVHOSTPARALLELR0OP_WRITECONTROL:
304	rc = drvR0HostParallelReqWriteControl(pDrvIns, u64Arg);
305	break;
306	case DRVHOSTPARALLELR0OP_SETPORTDIRECTION:
307	rc = drvR0HostParallelReqSetPortDir(pDrvIns, u64Arg);
308	break;
309	default: /* not supported */
310	rc = VERR_NOT_SUPPORTED;
311	}
312	LogFlowFuncLeave();
313	return rc;
314	}
315
316	# endif /* IN_RING0 */
317	#endif /* VBOX_WITH_WIN_PARPORT_SUP */
318
319	#ifdef IN_RING3
320	# ifdef VBOX_WITH_WIN_PARPORT_SUP
321
322	/**
323	* Find IO port range for the parallel port and return the lower address.
324	*
325	* @returns parallel port IO address.
326	* @param DevInst Device Instance for parallel port.
327	*/
328	static uint32_t drvHostWinFindIORangeResource(const DEVINST DevInst)
329	{
330	uint8_t *pBuf = NULL;
331	short wHeaderSize;
332	uint32_t u32Size;
333	CONFIGRET cmRet;
334	LOG_CONF firstLogConf;
335	LOG_CONF nextLogConf;
336	RES_DES rdPrevResDes;
337	uint32_t u32ParportAddr = 0;
338
339	wHeaderSize = sizeof(IO_DES);
340	cmRet = CM_Get_First_Log_Conf(&firstLogConf, DevInst, ALLOC_LOG_CONF);
341	if (cmRet != CR_SUCCESS)
342	{
343	cmRet = CM_Get_First_Log_Conf(&firstLogConf, DevInst, BOOT_LOG_CONF);
344	if (cmRet != CR_SUCCESS)
345	return 0;
346	}
347	cmRet = CM_Get_Next_Res_Des(&nextLogConf, firstLogConf, 2, 0L, 0L);
348	if (cmRet != CR_SUCCESS)
349	{
350	CM_Free_Res_Des_Handle(firstLogConf);
351	return 0;
352	}
353	/* This loop is based on the fact that only one resourece is assigned to
354	* the LPT port. If multiple resources (address range) are assigned to
355	* to LPT port, it will pick and return the last one
356	*/
357	for (;;)
358	{
359	u32Size = 0;
360	cmRet = CM_Get_Res_Des_Data_Size((PULONG)(&u32Size), nextLogConf, 0L);
361	if (cmRet != CR_SUCCESS)
362	{
363	LogFlowFunc(("Failed to get Size \n"));
364	CM_Free_Res_Des_Handle(nextLogConf);
365	break;
366	}
367
368	pBuf = (uint8_t *)RTMemAlloc(u32Size + 1);
369	if (!pBuf)
370	{
371	LogFlowFunc(("Failed to get Buf %d\n", u32Size));
372	CM_Free_Res_Des_Handle(nextLogConf);
373	break;
374	}
375	cmRet = CM_Get_Res_Des_Data(nextLogConf, pBuf, u32Size, 0L);
376	if (cmRet != CR_SUCCESS)
377	{
378	LogFlowFunc(("Failed to get Des Data \n"));
379	CM_Free_Res_Des_Handle(nextLogConf);
380	if (pBuf)
381	RTMemFree(pBuf);
382	break;
383	}
384
385	LogFlowFunc(("call GetIOResource\n"));
386	if (pBuf)
387	u32ParportAddr = ((IO_DES *)pBuf)->IOD_Alloc_Base;
388	LogFlowFunc(("called GetIOResource, ret=%#x\n", u32ParportAddr));
389	rdPrevResDes = 0;
390	cmRet = CM_Get_Next_Res_Des(&rdPrevResDes,
391	nextLogConf,
392	2,
393	0L,
394	0L);
395	if (pBuf)
396	RTMemFree(pBuf);
397	if (cmRet != CR_SUCCESS)
398	break;
399
400	CM_Free_Res_Des_Handle(nextLogConf);
401	nextLogConf = rdPrevResDes;
402	}
403	CM_Free_Res_Des_Handle(nextLogConf);
404	LogFlowFunc(("return u32ParportAddr=%#x", u32ParportAddr));
405	return u32ParportAddr;
406	}
407
408	/**
409	* Get Parallel port address and update the shared data
410	* structure.
411	* @returns VBox status code.
412	* @param pThis The host parallel port instance data.
413	*/
414	static int drvWinHostGetparportAddr(PDRVHOSTPARALLEL pThis)
415	{
416	HDEVINFO hDevInfo;
417	SP_DEVINFO_DATA DeviceInfoData;
418	uint32_t u32Idx;
419	uint32_t u32ParportAddr;
420	int rc = VINF_SUCCESS;
421
422	hDevInfo = SetupDiGetClassDevs(NULL, 0, 0, DIGCF_PRESENT \| DIGCF_ALLCLASSES);
423	if (hDevInfo == INVALID_HANDLE_VALUE)
424	return VERR_INVALID_HANDLE;
425
426	/* Enumerate through all devices in Set. */
427	DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
428	for (u32Idx = 0; SetupDiEnumDeviceInfo(hDevInfo, u32Idx, &DeviceInfoData); u32Idx++)
429	{
430	DWORD dwDataType;
431	uint8_t *pBuf = NULL;
432	DWORD dwBufSize = 0;
433
434	while (!SetupDiGetDeviceRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_FRIENDLYNAME,
435	(PDWORD)&dwDataType, (uint8_t *)pBuf,
436	dwBufSize, (PDWORD)&dwBufSize))
437	{
438	if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
439	{
440	LogFlow(("ERROR_INSUFF_BUFF = %d. dwBufSz = %d\n", GetLastError(), dwBufSize));
441	if (pBuf)
442	RTMemFree(pBuf);
443	pBuf = (uint8_t )RTMemAlloc(dwBufSize 2);
444	}
445	else
446	{
447	/* No need to bother about this error (in most cases its errno=13,
448	* INVALID_DATA . Just break from here and proceed to next device
449	* enumerated item
450	*/
451	LogFlow(("GetDevProp Error = %d & dwBufSz = %d\n", GetLastError(), dwBufSize));
452	break;
453	}
454	}
455
456	if (RTStrStr((char*)pBuf, "LPT"))
457	{
458	u32ParportAddr = drvHostWinFindIORangeResource(DeviceInfoData.DevInst);
459	if (u32ParportAddr)
460	{
461	/* Find parallel port name and update the shared data struncture */
462	char pCh = RTStrStr((char)pBuf, "(");
463	char pTmpCh = RTStrStr((char )pBuf, ")");
464	/* check for the confirmation for the availability of parallel port */
465	if (!(pCh && pTmpCh))
466	{
467	LogFlowFunc(("Parallel port Not Found. \n"));
468	return VERR_NOT_FOUND;
469
470	}
471	if (((pTmpCh - (char )pBuf) - (pCh - (char )pBuf)) < 0) {
472	LogFlowFunc(("Parallel port string not properly formatted.\n"));
473	return VERR_NOT_FOUND;
474	}
475	/* check for the confirmation for the availability of parallel port */
476	if (RTStrCopyEx((char *)(pThis->szParportName), sizeof(pThis->szParportName),
477	pCh+1, ((pTmpCh - (char )pBuf) - (pCh - (char )pBuf)) - 1))
478	{
479	LogFlowFunc(("Parallel Port Not Found.\n"));
480	return VERR_NOT_FOUND;
481	}
482	((char )pThis->szParportName + (pTmpCh - (char )pBuf) - (pCh - (char )pBuf) + 1 ) = '\0';
483
484	/* checking again to make sure that we have got a valid name and in valid format too. */
485	if (RTStrNCmp((char *)pThis->szParportName, "LPT", 3)) {
486	LogFlowFunc(("Parallel Port name \"LPT\" Not Found.\n"));
487	return VERR_NOT_FOUND;
488	}
489	if (!RTStrStr((char *)pThis->szParportName, "LPT")
490	\|\| !(pThis->szParportName[3] >= '0'
491	&& pThis->szParportName[3] <= '9'))
492	{
493	RT_BZERO(pThis->szParportName, sizeof(pThis->szParportName));
494	LogFlowFunc(("Printer Port Name Not Found.\n"));
495	return VERR_NOT_FOUND;
496	}
497	pThis->fParportAvail = true;
498	pThis->u32LptAddr = u32ParportAddr;
499	pThis->u32LptAddrControl = pThis->u32LptAddr + CTRL_REG_OFFSET;
500	pThis->u32LptAddrStatus = pThis->u32LptAddr + STATUS_REG_OFFSET;
501	}
502	else
503	LogFlowFunc(("u32Parport Addr No Available \n"));
504	if (pThis->fParportAvail)
505	break;
506	}
507	if (pBuf)
508	RTMemFree(pBuf);
509	if (pThis->fParportAvail)
510	{
511	/* Parallel port address has been found. No need to iterate further. */
512	break;
513	}
514	}
515
516	if (GetLastError() != NO_ERROR && GetLastError() != ERROR_NO_MORE_ITEMS)
517	rc = VERR_GENERAL_FAILURE;
518
519	SetupDiDestroyDeviceInfoList(hDevInfo);
520	return rc;
521
522	}
523	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
524
525	/**
526	* Changes the current mode of the host parallel port.
527	*
528	* @returns VBox status code.
529	* @param pThis The host parallel port instance data.
530	* @param enmMode The mode to change the port to.
531	*/
532	static int drvHostParallelSetMode(PDRVHOSTPARALLEL pThis, PDMPARALLELPORTMODE enmMode)
533	{
534	int iMode = 0;
535	int rc = VINF_SUCCESS;
536	LogFlowFunc(("mode=%d\n", enmMode));
537
538	# ifndef VBOX_WITH_WIN_PARPORT_SUP
539	int rcLnx;
540	if (pThis->enmModeCur != enmMode)
541	{
542	switch (enmMode)
543	{
544	case PDM_PARALLEL_PORT_MODE_SPP:
545	iMode = IEEE1284_MODE_COMPAT;
546	break;
547	case PDM_PARALLEL_PORT_MODE_EPP_DATA:
548	iMode = IEEE1284_MODE_EPP \| IEEE1284_DATA;
549	break;
550	case PDM_PARALLEL_PORT_MODE_EPP_ADDR:
551	iMode = IEEE1284_MODE_EPP \| IEEE1284_ADDR;
552	break;
553	case PDM_PARALLEL_PORT_MODE_ECP:
554	case PDM_PARALLEL_PORT_MODE_INVALID:
555	default:
556	return VERR_NOT_SUPPORTED;
557	}
558
559	rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPSETMODE, &iMode);
560	if (RT_UNLIKELY(rcLnx < 0))
561	rc = RTErrConvertFromErrno(errno);
562	else
563	pThis->enmModeCur = enmMode;
564	}
565
566	return rc;
567	# else /* VBOX_WITH_WIN_PARPORT_SUP */
568	return VINF_SUCCESS;
569	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
570	}
571
572	/* -=-=-=-=- IBase -=-=-=-=- */
573
574	/**
575	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
576	*/
577	static DECLCALLBACK(void ) drvHostParallelQueryInterface(PPDMIBASE pInterface, const char pszIID)
578	{
579	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
580	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
581
582	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
583	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTPARALLELCONNECTOR, &pThis->CTX_SUFF(IHostParallelConnector));
584	return NULL;
585	}
586
587
588	/* -=-=-=-=- IHostDeviceConnector -=-=-=-=- */
589
590	/** @copydoc PDMICHARCONNECTOR::pfnWrite */
591	static DECLCALLBACK(int) drvHostParallelWrite(PPDMIHOSTPARALLELCONNECTOR pInterface, const void *pvBuf, size_t cbWrite, PDMPARALLELPORTMODE enmMode)
592	{
593	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
594	//PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
595	PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
596	int rc = VINF_SUCCESS;
597	int rcLnx = 0;
598
599	LogFlowFunc(("pvBuf=%#p cbWrite=%d\n", pvBuf, cbWrite));
600
601	rc = drvHostParallelSetMode(pThis, enmMode);
602	if (RT_FAILURE(rc))
603	return rc;
604	# ifndef VBOX_WITH_WIN_PARPORT_SUP
605	if (enmMode == PDM_PARALLEL_PORT_MODE_SPP)
606	{
607	/* Set the data lines directly. */
608	rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWDATA, pvBuf);
609	}
610	else
611	{
612	/* Use write interface. */
613	rcLnx = write(RTFileToNative(pThis->hFileDevice), pvBuf, cbWrite);
614	}
615	if (RT_UNLIKELY(rcLnx < 0))
616	rc = RTErrConvertFromErrno(errno);
617	# else /* VBOX_WITH_WIN_PARPORT_SUP */
618	if (pThis->fParportAvail)
619	{
620	for (size_t i = 0; i < cbWrite; i++)
621	{
622	uint64_t u64Data = (uint8_t) ((uint8_t )(pvBuf) + i);
623	LogFlowFunc(("calling R0 to write to parallel port, data=%#x\n", u64Data));
624	rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_WRITE, u64Data);
625	AssertRC(rc);
626	}
627	}
628	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
629	return rc;
630	}
631
632	/**
633	* @interface_method_impl{PDMIBASE,pfnRead}
634	*/
635	static DECLCALLBACK(int) drvHostParallelRead(PPDMIHOSTPARALLELCONNECTOR pInterface, void *pvBuf, size_t cbRead, PDMPARALLELPORTMODE enmMode)
636	{
637	PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
638	int rc = VINF_SUCCESS;
639
640	# ifndef VBOX_WITH_WIN_PARPORT_SUP
641	int rcLnx = 0;
642	LogFlowFunc(("pvBuf=%#p cbRead=%d\n", pvBuf, cbRead));
643
644	rc = drvHostParallelSetMode(pThis, enmMode);
645	if (RT_FAILURE(rc))
646	return rc;
647
648	if (enmMode == PDM_PARALLEL_PORT_MODE_SPP)
649	{
650	/* Set the data lines directly. */
651	rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWDATA, pvBuf);
652	}
653	else
654	{
655	/* Use write interface. */
656	rcLnx = read(RTFileToNative(pThis->hFileDevice), pvBuf, cbRead);
657	}
658	if (RT_UNLIKELY(rcLnx < 0))
659	rc = RTErrConvertFromErrno(errno);
660	# else /* VBOX_WITH_WIN_PARPORT_SUP */
661	if (pThis->fParportAvail)
662	{
663	((uint8_t)(pvBuf)) = 0; /* Initialize the buffer. */
664	for (size_t i = 0; i < cbRead; i++)
665	{
666	LogFlowFunc(("calling R0 to read from parallel port\n"));
667	int rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READ, 0);
668	AssertRC(rc);
669	((uint8_t )pvBuf + i) = (uint8_t)pThis->u8ReadIn;
670	}
671	}
672	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
673	return rc;
674	}
675
676	static DECLCALLBACK(int) drvHostParallelSetPortDirection(PPDMIHOSTPARALLELCONNECTOR pInterface, bool fForward)
677	{
678	PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
679	int rc = VINF_SUCCESS;
680	int iMode = 0;
681	if (!fForward)
682	iMode = 1;
683	# ifndef VBOX_WITH_WIN_PARPORT_SUP
684	int rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPDATADIR, &iMode);
685	if (RT_UNLIKELY(rcLnx < 0))
686	rc = RTErrConvertFromErrno(errno);
687
688	# else /* VBOX_WITH_WIN_PARPORT_SUP */
689	uint64_t u64Data;
690	u64Data = (uint8_t)iMode;
691	if (pThis->fParportAvail)
692	{
693	LogFlowFunc(("calling R0 to write CTRL, data=%#x\n", u64Data));
694	rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_SETPORTDIRECTION, u64Data);
695	AssertRC(rc);
696	}
697	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
698	return rc;
699	}
700
701	/**
702	* @interface_method_impl{PDMIBASE,pfnWriteControl}
703	*/
704	static DECLCALLBACK(int) drvHostParallelWriteControl(PPDMIHOSTPARALLELCONNECTOR pInterface, uint8_t fReg)
705	{
706	PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
707	int rc = VINF_SUCCESS;
708	int rcLnx = 0;
709
710	LogFlowFunc(("fReg=%#x\n", fReg));
711	# ifndef VBOX_WITH_WIN_PARPORT_SUP
712	rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWCONTROL, &fReg);
713	if (RT_UNLIKELY(rcLnx < 0))
714	rc = RTErrConvertFromErrno(errno);
715	# else /* VBOX_WITH_WIN_PARPORT_SUP */
716	uint64_t u64Data;
717	u64Data = (uint8_t)fReg;
718	if (pThis->fParportAvail)
719	{
720	LogFlowFunc(("calling R0 to write CTRL, data=%#x\n", u64Data));
721	rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_WRITECONTROL, u64Data);
722	AssertRC(rc);
723	}
724	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
725	return rc;
726	}
727
728
729	/**
730	* @interface_method_impl{PDMIBASE,pfnReadControl}
731	*/
732	static DECLCALLBACK(int) drvHostParallelReadControl(PPDMIHOSTPARALLELCONNECTOR pInterface, uint8_t *pfReg)
733	{
734	PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
735	int rc = VINF_SUCCESS;
736	int rcLnx = 0;
737	uint8_t fReg = 0;
738
739	# ifndef VBOX_WITH_WIN_PARPORT_SUP
740	rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPRCONTROL, &fReg);
741	if (RT_UNLIKELY(rcLnx < 0))
742	rc = RTErrConvertFromErrno(errno);
743	else
744	{
745	LogFlowFunc(("fReg=%#x\n", fReg));
746	*pfReg = fReg;
747	}
748	# else /* VBOX_WITH_WIN_PARPORT_SUP */
749	pfReg = 0; / Initialize the buffer*/
750	if (pThis->fParportAvail)
751	{
752	LogFlowFunc(("calling R0 to read control from parallel port\n"));
753	rc = PDMDrvHlpCallR0(pThis-> CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READCONTROL, 0);
754	AssertRC(rc);
755	*pfReg = pThis->u8ReadInControl;
756	}
757	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
758	return rc;
759	}
760
761	/**
762	* @interface_method_impl{PDMIBASE,pfnReadStatus}
763	*/
764	static DECLCALLBACK(int) drvHostParallelReadStatus(PPDMIHOSTPARALLELCONNECTOR pInterface, uint8_t *pfReg)
765	{
766	PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
767	int rc = VINF_SUCCESS;
768	int rcLnx = 0;
769	uint8_t fReg = 0;
770	# ifndef VBOX_WITH_WIN_PARPORT_SUP
771	rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPRSTATUS, &fReg);
772	if (RT_UNLIKELY(rcLnx < 0))
773	rc = RTErrConvertFromErrno(errno);
774	else
775	{
776	LogFlowFunc(("fReg=%#x\n", fReg));
777	*pfReg = fReg;
778	}
779	# else /* VBOX_WITH_WIN_PARPORT_SUP */
780	pfReg = 0; / Intialize the buffer. */
781	if (pThis->fParportAvail)
782	{
783	LogFlowFunc(("calling R0 to read status from parallel port\n"));
784	rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READSTATUS, 0);
785	AssertRC(rc);
786	*pfReg = pThis->u8ReadInStatus;
787	}
788	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
789	return rc;
790	}
791
792	# ifndef VBOX_WITH_WIN_PARPORT_SUP
793
794	static DECLCALLBACK(int) drvHostParallelMonitorThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
795	{
796	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
797	struct pollfd aFDs[2];
798
799	/*
800	* We can wait for interrupts using poll on linux hosts.
801	*/
802	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
803	{
804	int rc;
805
806	aFDs[0].fd = RTFileToNative(pThis->hFileDevice);
807	aFDs[0].events = POLLIN;
808	aFDs[0].revents = 0;
809	aFDs[1].fd = RTPipeToNative(pThis->hWakeupPipeR);
810	aFDs[1].events = POLLIN \| POLLERR \| POLLHUP;
811	aFDs[1].revents = 0;
812	rc = poll(aFDs, RT_ELEMENTS(aFDs), -1);
813	if (rc < 0)
814	{
815	AssertMsgFailed(("poll failed with rc=%d\n", RTErrConvertFromErrno(errno)));
816	return RTErrConvertFromErrno(errno);
817	}
818
819	if (pThread->enmState != PDMTHREADSTATE_RUNNING)
820	break;
821	if (rc > 0 && aFDs[1].revents)
822	{
823	if (aFDs[1].revents & (POLLHUP \| POLLERR \| POLLNVAL))
824	break;
825	/* notification to terminate -- drain the pipe */
826	char ch;
827	size_t cbRead;
828	RTPipeRead(pThis->hWakeupPipeR, &ch, 1, &cbRead);
829	continue;
830	}
831
832	/* Interrupt occurred. */
833	rc = pThis->pDrvHostParallelPort->pfnNotifyInterrupt(pThis->pDrvHostParallelPort);
834	AssertRC(rc);
835	}
836
837	return VINF_SUCCESS;
838	}
839
840	/**
841	* Unblock the monitor thread so it can respond to a state change.
842	*
843	* @returns a VBox status code.
844	* @param pDrvIns The driver instance.
845	* @param pThread The send thread.
846	*/
847	static DECLCALLBACK(int) drvHostParallelWakeupMonitorThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
848	{
849	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
850	size_t cbIgnored;
851	return RTPipeWrite(pThis->hWakeupPipeW, "", 1, &cbIgnored);
852	}
853
854	# endif /* VBOX_WITH_WIN_PARPORT_SUP */
855
856	/**
857	* Destruct a host parallel driver instance.
858	*
859	* Most VM resources are freed by the VM. This callback is provided so that
860	* any non-VM resources can be freed correctly.
861	*
862	* @param pDrvIns The driver instance data.
863	*/
864	static DECLCALLBACK(void) drvHostParallelDestruct(PPDMDRVINS pDrvIns)
865	{
866	int rc;
867	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
868	LogFlowFunc(("iInstance=%d\n", pDrvIns->iInstance));
869	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
870
871	#ifndef VBOX_WITH_WIN_PARPORT_SUP
872	if (pThis->hFileDevice != NIL_RTFILE)
873	ioctl(RTFileToNative(pThis->hFileDevice), PPRELEASE);
874
875	rc = RTPipeClose(pThis->hWakeupPipeW); AssertRC(rc);
876	pThis->hWakeupPipeW = NIL_RTPIPE;
877
878	rc = RTPipeClose(pThis->hWakeupPipeR); AssertRC(rc);
879	pThis->hWakeupPipeR = NIL_RTPIPE;
880
881	rc = RTFileClose(pThis->hFileDevice); AssertRC(rc);
882	pThis->hFileDevice = NIL_RTFILE;
883
884	if (pThis->pszDevicePath)
885	{
886	MMR3HeapFree(pThis->pszDevicePath);
887	pThis->pszDevicePath = NULL;
888	}
889	#else /* VBOX_WITH_WIN_PARPORT_SUP */
890	if (pThis->hWinFileDevice != NIL_RTFILE)
891	rc = RTFileClose(pThis->hWinFileDevice); AssertRC(rc);
892	#endif /* VBOX_WITH_WIN_PARPORT_SUP */
893	}
894
895	/**
896	* Construct a host parallel driver instance.
897	*
898	* @copydoc FNPDMDRVCONSTRUCT
899	*/
900	static DECLCALLBACK(int) drvHostParallelConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
901	{
902	PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
903	LogFlowFunc(("iInstance=%d\n", pDrvIns->iInstance));
904
905	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
906
907	/*
908	* Init basic data members and interfaces.
909	*
910	* Must be done before returning any failure because we've got a destructor.
911	*/
912	pThis->hFileDevice = NIL_RTFILE;
913	#ifndef VBOX_WITH_WIN_PARPORT_SUP
914	pThis->hWakeupPipeR = NIL_RTPIPE;
915	pThis->hWakeupPipeW = NIL_RTPIPE;
916	#else /* VBOX_WITH_WIN_PARPORT_SUP */
917	pThis->hWinFileDevice = NIL_RTFILE;
918	#endif
919
920	pThis->pDrvInsR3 = pDrvIns;
921	#ifdef VBOX_WITH_DRVINTNET_IN_R0
922	pThis->pDrvInsR0 = PDMDRVINS_2_R0PTR(pDrvIns);
923	#endif
924
925	/* IBase. */
926	pDrvIns->IBase.pfnQueryInterface = drvHostParallelQueryInterface;
927	/* IHostParallelConnector. */
928	pThis->IHostParallelConnectorR3.pfnWrite = drvHostParallelWrite;
929	pThis->IHostParallelConnectorR3.pfnRead = drvHostParallelRead;
930	pThis->IHostParallelConnectorR3.pfnSetPortDirection = drvHostParallelSetPortDirection;
931	pThis->IHostParallelConnectorR3.pfnWriteControl = drvHostParallelWriteControl;
932	pThis->IHostParallelConnectorR3.pfnReadControl = drvHostParallelReadControl;
933	pThis->IHostParallelConnectorR3.pfnReadStatus = drvHostParallelReadStatus;
934
935	/*
936	* Validate the config.
937	*/
938	if (!CFGMR3AreValuesValid(pCfg, "DevicePath\0"))
939	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
940	N_("Unknown host parallel configuration option, only supports DevicePath"));
941
942	/*
943	* Query configuration.
944	*/
945	/* Device */
946	int rc = CFGMR3QueryStringAlloc(pCfg, "DevicePath", &pThis->pszDevicePath);
947	if (RT_FAILURE(rc))
948	{
949	AssertMsgFailed(("Configuration error: query for \"DevicePath\" string returned %Rra.\n", rc));
950	return rc;
951	}
952
953	/*
954	* Open the device
955	*/
956	rc = RTFileOpen(&pThis->hFileDevice, pThis->pszDevicePath, RTFILE_O_READWRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE);
957	if (RT_FAILURE(rc))
958	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("Parallel#%d could not open '%s'"),
959	pDrvIns->iInstance, pThis->pszDevicePath);
960
961	#ifndef VBOX_WITH_WIN_PARPORT_SUP
962	/*
963	* Try to get exclusive access to parallel port
964	*/
965	rc = ioctl(RTFileToNative(pThis->hFileDevice), PPEXCL);
966	if (rc < 0)
967	return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
968	N_("Parallel#%d could not get exclusive access for parallel port '%s'"
969	"Be sure that no other process or driver accesses this port"),
970	pDrvIns->iInstance, pThis->pszDevicePath);
971
972	/*
973	* Claim the parallel port
974	*/
975	rc = ioctl(RTFileToNative(pThis->hFileDevice), PPCLAIM);
976	if (rc < 0)
977	return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
978	N_("Parallel#%d could not claim parallel port '%s'"
979	"Be sure that no other process or driver accesses this port"),
980	pDrvIns->iInstance, pThis->pszDevicePath);
981
982	/*
983	* Get the IHostParallelPort interface of the above driver/device.
984	*/
985	pThis->pDrvHostParallelPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIHOSTPARALLELPORT);
986	if (!pThis->pDrvHostParallelPort)
987	return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE, RT_SRC_POS, N_("Parallel#%d has no parallel port interface above"),
988	pDrvIns->iInstance);
989
990	/*
991	* Create wakeup pipe.
992	*/
993	rc = RTPipeCreate(&pThis->hWakeupPipeR, &pThis->hWakeupPipeW, 0 /fFlags/);
994	AssertRCReturn(rc, rc);
995
996	/*
997	* Start in SPP mode.
998	*/
999	pThis->enmModeCur = PDM_PARALLEL_PORT_MODE_INVALID;
1000	rc = drvHostParallelSetMode(pThis, PDM_PARALLEL_PORT_MODE_SPP);
1001	if (RT_FAILURE(rc))
1002	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostParallel#%d cannot change mode of parallel mode to SPP"), pDrvIns->iInstance);
1003
1004	/*
1005	* Start waiting for interrupts.
1006	*/
1007	rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pMonitorThread, pThis, drvHostParallelMonitorThread, drvHostParallelWakeupMonitorThread, 0,
1008	RTTHREADTYPE_IO, "ParMon");
1009	if (RT_FAILURE(rc))
1010	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostParallel#%d cannot create monitor thread"), pDrvIns->iInstance);
1011
1012	#else /* VBOX_WITH_WIN_PARPORT_SUP */
1013	HANDLE hPort;
1014	pThis->fParportAvail = false;
1015	pThis->u32LptAddr = 0;
1016	pThis->u32LptAddrControl = 0;
1017	pThis->u32LptAddrStatus = 0;
1018	rc = drvWinHostGetparportAddr(pThis);
1019
1020	/* If we have the char port availabe use it , else I am not getting exclusive access to parallel port.
1021	Read and write will be done only if addresses are available
1022	*/
1023	if (pThis->szParportName)
1024	{
1025	rc = RTFileOpen(&pThis->hWinFileDevice, (char *)pThis->szParportName,
1026	RTFILE_O_READWRITE \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE);
1027	}
1028	#endif
1029	return VINF_SUCCESS;
1030	}
1031
1032
1033	/**
1034	* Char driver registration record.
1035	*/
1036	const PDMDRVREG g_DrvHostParallel =
1037	{
1038	/* u32Version */
1039	PDM_DRVREG_VERSION,
1040	/* szName */
1041	"HostParallel",
1042	/* szRCMod */
1043	"",
1044	/* szR0Mod */
1045	"VBoxDDR0.r0",
1046	/* pszDescription */
1047	"Parallel host driver.",
1048	/* fFlags */
1049	# if defined(VBOX_WITH_WIN_PARPORT_SUP)
1050	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT \| PDM_DRVREG_FLAGS_R0,
1051	# else
1052	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1053	# endif
1054	/* fClass. */
1055	PDM_DRVREG_CLASS_CHAR,
1056	/* cMaxInstances */
1057	~0U,
1058	/* cbInstance */
1059	sizeof(DRVHOSTPARALLEL),
1060	/* pfnConstruct */
1061	drvHostParallelConstruct,
1062	/* pfnDestruct */
1063	drvHostParallelDestruct,
1064	/* pfnRelocate */
1065	NULL,
1066	/* pfnIOCtl */
1067	NULL,
1068	/* pfnPowerOn */
1069	NULL,
1070	/* pfnReset */
1071	NULL,
1072	/* pfnSuspend */
1073	NULL,
1074	/* pfnResume */
1075	NULL,
1076	/* pfnAttach */
1077	NULL,
1078	/* pfnDetach */
1079	NULL,
1080	/* pfnPowerOff */
1081	NULL,
1082	/* pfnSoftReset */
1083	NULL,
1084	/* u32EndVersion */
1085	PDM_DRVREG_VERSION
1086	};
1087	#endif /IN_RING3/
1088
1089

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source: vbox/trunk/src/VBox/Devices/Parallel/DrvHostParallel.cpp@ 43458

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