DevSerial.cpp@ 14831

Last change on this file since 14831 was 12978, checked in by vboxsync, 16 years ago
PDM: PDM_DEVREG_FLAGS_DEFAULT_BITS convenience.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 31.7 KB

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1	/* $Id: DevSerial.cpp 12978 2008-10-03 23:28:44Z vboxsync $ */
2	/** @file
3	* DevSerial - 16450 UART emulation.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/*
23	* This code is based on:
24	*
25	* QEMU 16450 UART emulation
26	*
27	* Copyright (c) 2003-2004 Fabrice Bellard
28	*
29	* Permission is hereby granted, free of charge, to any person obtaining a copy
30	* of this software and associated documentation files (the "Software"), to deal
31	* in the Software without restriction, including without limitation the rights
32	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
33	* copies of the Software, and to permit persons to whom the Software is
34	* furnished to do so, subject to the following conditions:
35	*
36	* The above copyright notice and this permission notice shall be included in
37	* all copies or substantial portions of the Software.
38	*
39	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
40	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
41	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
42	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
43	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
44	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
45	* THE SOFTWARE.
46	*
47	*/
48
49	/*******************************************************************************
50	* Header Files *
51	*******************************************************************************/
52	#define LOG_GROUP LOG_GROUP_DEV_SERIAL
53	#include <VBox/pdmdev.h>
54	#include <iprt/assert.h>
55	#include <iprt/uuid.h>
56	#include <iprt/string.h>
57	#include <iprt/semaphore.h>
58	#include <iprt/critsect.h>
59
60	#include "../Builtins.h"
61
62	#undef VBOX_SERIAL_PCI /* The PCI variant has lots of problems: wrong IRQ line and wrong IO base assigned. */
63
64	#ifdef VBOX_SERIAL_PCI
65	# include <VBox/pci.h>
66	#endif /* VBOX_SERIAL_PCI */
67
68
69	/*******************************************************************************
70	* Defined Constants And Macros *
71	*******************************************************************************/
72	#define SERIAL_SAVED_STATE_VERSION 3
73
74	#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
75
76	#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
77	#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
78	#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
79	#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
80
81	#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
82	#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
83
84	#define UART_IIR_MSI 0x00 /* Modem status interrupt */
85	#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
86	#define UART_IIR_RDI 0x04 /* Receiver data interrupt */
87	#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
88
89	/*
90	* These are the definitions for the Modem Control Register
91	*/
92	#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
93	#define UART_MCR_OUT2 0x08 /* Out2 complement */
94	#define UART_MCR_OUT1 0x04 /* Out1 complement */
95	#define UART_MCR_RTS 0x02 /* RTS complement */
96	#define UART_MCR_DTR 0x01 /* DTR complement */
97
98	/*
99	* These are the definitions for the Modem Status Register
100	*/
101	#define UART_MSR_DCD 0x80 /* Data Carrier Detect */
102	#define UART_MSR_RI 0x40 /* Ring Indicator */
103	#define UART_MSR_DSR 0x20 /* Data Set Ready */
104	#define UART_MSR_CTS 0x10 /* Clear to Send */
105	#define UART_MSR_DDCD 0x08 /* Delta DCD */
106	#define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */
107	#define UART_MSR_DDSR 0x02 /* Delta DSR */
108	#define UART_MSR_DCTS 0x01 /* Delta CTS */
109	#define UART_MSR_ANY_DELTA 0x0F /* Any of the delta bits! */
110
111	#define UART_LSR_TEMT 0x40 /* Transmitter empty */
112	#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */
113	#define UART_LSR_BI 0x10 /* Break interrupt indicator */
114	#define UART_LSR_FE 0x08 /* Frame error indicator */
115	#define UART_LSR_PE 0x04 /* Parity error indicator */
116	#define UART_LSR_OE 0x02 /* Overrun error indicator */
117	#define UART_LSR_DR 0x01 /* Receiver data ready */
118
119
120	/*******************************************************************************
121	* Structures and Typedefs *
122	*******************************************************************************/
123	struct SerialState
124	{
125	/** Access critical section. */
126	PDMCRITSECT CritSect;
127
128	/** Pointer to the device instance - R3 Ptr. */
129	PPDMDEVINSR3 pDevInsR3;
130	/** Pointer to the device instance - R0 Ptr. */
131	PPDMDEVINSR0 pDevInsR0;
132	/** Pointer to the device instance - RC Ptr. */
133	PPDMDEVINSRC pDevInsRC;
134	RTRCPTR Alignment0; /*< Alignment. /
135	/** The base interface. */
136	PDMIBASE IBase;
137	/** The character port interface. */
138	PDMICHARPORT ICharPort;
139	/** Pointer to the attached base driver. */
140	R3PTRTYPE(PPDMIBASE) pDrvBase;
141	/** Pointer to the attached character driver. */
142	R3PTRTYPE(PPDMICHAR) pDrvChar;
143
144	uint16_t divider;
145	uint16_t auAlignment[3];
146	uint8_t rbr; /* receive register */
147	uint8_t ier;
148	uint8_t iir; /* read only */
149	uint8_t lcr;
150	uint8_t mcr;
151	uint8_t lsr; /* read only */
152	uint8_t msr; /* read only */
153	uint8_t scr;
154	/* NOTE: this hidden state is necessary for tx irq generation as
155	it can be reset while reading iir */
156	int thr_ipending;
157	int irq;
158	bool msr_changed;
159
160	bool fGCEnabled;
161	bool fR0Enabled;
162	bool afAlignment[5];
163
164	RTSEMEVENT ReceiveSem;
165	int last_break_enable;
166	uint32_t base;
167
168	#ifdef VBOX_SERIAL_PCI
169	PCIDEVICE dev;
170	#endif /* VBOX_SERIAL_PCI */
171	};
172
173	#ifndef VBOX_DEVICE_STRUCT_TESTCASE
174
175
176	#ifdef VBOX_SERIAL_PCI
177	#define PCIDEV_2_SERIALSTATE(pPciDev) ( (SerialState *)((uintptr_t)(pPciDev) - RT_OFFSETOF(SerialState, dev)) )
178	#endif /* VBOX_SERIAL_PCI */
179	#define PDMIBASE_2_SERIALSTATE(pInstance) ( (SerialState *)((uintptr_t)(pInterface) - RT_OFFSETOF(SerialState, IBase)) )
180	#define PDMICHARPORT_2_SERIALSTATE(pInstance) ( (SerialState *)((uintptr_t)(pInterface) - RT_OFFSETOF(SerialState, ICharPort)) )
181
182
183	/*******************************************************************************
184	* Internal Functions *
185	*******************************************************************************/
186	__BEGIN_DECLS
187	PDMBOTHCBDECL(int) serialIOPortRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT Port, uint32_t pu32, unsigned cb);
188	PDMBOTHCBDECL(int) serialIOPortWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t u32, unsigned cb);
189	__END_DECLS
190
191	#ifdef IN_RING3
192
193	static void serial_update_irq(SerialState *s)
194	{
195	if ((s->lsr & UART_LSR_DR) && (s->ier & UART_IER_RDI)) {
196	s->iir = UART_IIR_RDI;
197	} else if (s->thr_ipending && (s->ier & UART_IER_THRI)) {
198	s->iir = UART_IIR_THRI;
199	} else if (s->msr_changed && (s->ier & UART_IER_RLSI)) {
200	s->iir = UART_IIR_RLSI;
201	} else {
202	s->iir = UART_IIR_NO_INT;
203	}
204	if (s->iir != UART_IIR_NO_INT) {
205	Log(("serial_update_irq %d 1\n", s->irq));
206	# ifdef VBOX_SERIAL_PCI
207	PDMDevHlpPCISetIrqNoWait(s->CTX_SUFF(pDevIns), 0, 1);
208	# else /* !VBOX_SERIAL_PCI */
209	PDMDevHlpISASetIrqNoWait(s->CTX_SUFF(pDevIns), s->irq, 1);
210	# endif /* !VBOX_SERIAL_PCI */
211	} else {
212	Log(("serial_update_irq %d 0\n", s->irq));
213	# ifdef VBOX_SERIAL_PCI
214	PDMDevHlpPCISetIrqNoWait(s->CTX_SUFF(pDevIns), 0, 0);
215	# else /* !VBOX_SERIAL_PCI */
216	PDMDevHlpISASetIrqNoWait(s->CTX_SUFF(pDevIns), s->irq, 0);
217	# endif /* !VBOX_SERIAL_PCI */
218	}
219	}
220
221	static void serial_update_parameters(SerialState *s)
222	{
223	int speed, parity, data_bits, stop_bits;
224
225	if (s->lcr & 0x08) {
226	if (s->lcr & 0x10)
227	parity = 'E';
228	else
229	parity = 'O';
230	} else {
231	parity = 'N';
232	}
233	if (s->lcr & 0x04)
234	stop_bits = 2;
235	else
236	stop_bits = 1;
237	data_bits = (s->lcr & 0x03) + 5;
238	if (s->divider == 0)
239	return;
240	speed = 115200 / s->divider;
241	Log(("speed=%d parity=%c data=%d stop=%d\n", speed, parity, data_bits, stop_bits));
242	if (RT_LIKELY(s->pDrvChar))
243	s->pDrvChar->pfnSetParameters(s->pDrvChar, speed, parity, data_bits, stop_bits);
244	}
245
246	#endif /* IN_RING3 */
247
248	static int serial_ioport_write(void *opaque, uint32_t addr, uint32_t val)
249	{
250	SerialState s = (SerialState )opaque;
251	unsigned char ch;
252
253	addr &= 7;
254	LogFlow(("serial: write addr=0x%02x val=0x%02x\n", addr, val));
255
256	#ifndef IN_RING3
257	NOREF(ch);
258	NOREF(s);
259	return VINF_IOM_HC_IOPORT_WRITE;
260	#else
261	switch(addr) {
262	default:
263	case 0:
264	if (s->lcr & UART_LCR_DLAB) {
265	s->divider = (s->divider & 0xff00) \| val;
266	serial_update_parameters(s);
267	} else {
268	s->thr_ipending = 0;
269	s->lsr &= ~UART_LSR_THRE;
270	serial_update_irq(s);
271	ch = val;
272	if (RT_LIKELY(s->pDrvChar))
273	{
274	Log(("serial_io_port_write: write 0x%X\n", ch));
275	int rc = s->pDrvChar->pfnWrite(s->pDrvChar, &ch, 1);
276	AssertRC(rc);
277	}
278	s->thr_ipending = 1;
279	s->lsr \|= UART_LSR_THRE;
280	s->lsr \|= UART_LSR_TEMT;
281	serial_update_irq(s);
282	}
283	break;
284	case 1:
285	if (s->lcr & UART_LCR_DLAB) {
286	s->divider = (s->divider & 0x00ff) \| (val << 8);
287	serial_update_parameters(s);
288	} else {
289	s->ier = val & 0x0f;
290	if (s->lsr & UART_LSR_THRE) {
291	s->thr_ipending = 1;
292	}
293	serial_update_irq(s);
294	}
295	break;
296	case 2:
297	break;
298	case 3:
299	{
300	int break_enable;
301	if (s->lcr != val)
302	{
303	s->lcr = val;
304	serial_update_parameters(s);
305	}
306	break_enable = (val >> 6) & 1;
307	if (break_enable != s->last_break_enable) {
308	s->last_break_enable = break_enable;
309	}
310	}
311	break;
312	case 4:
313	s->mcr = val & 0x1f;
314	if (RT_LIKELY(s->pDrvChar))
315	{
316	int rc = s->pDrvChar->pfnSetModemLines(s->pDrvChar, !!(s->mcr & UART_MCR_RTS), !!(s->mcr & UART_MCR_DTR));
317	AssertRC(rc);
318	}
319	break;
320	case 5:
321	break;
322	case 6:
323	break;
324	case 7:
325	s->scr = val;
326	break;
327	}
328	return VINF_SUCCESS;
329	#endif
330	}
331
332	static uint32_t serial_ioport_read(void opaque, uint32_t addr, int pRC)
333	{
334	SerialState s = (SerialState )opaque;
335	uint32_t ret = ~0U;
336
337	*pRC = VINF_SUCCESS;
338
339	addr &= 7;
340	switch(addr) {
341	default:
342	case 0:
343	if (s->lcr & UART_LCR_DLAB) {
344	ret = s->divider & 0xff;
345	} else {
346	#ifndef IN_RING3
347	*pRC = VINF_IOM_HC_IOPORT_READ;
348	#else
349	Log(("serial_io_port_read: read 0x%X\n", s->rbr));
350	ret = s->rbr;
351	s->lsr &= ~(UART_LSR_DR \| UART_LSR_BI);
352	serial_update_irq(s);
353	{
354	int rc = RTSemEventSignal(s->ReceiveSem);
355	AssertRC(rc);
356	}
357	#endif
358	}
359	break;
360	case 1:
361	if (s->lcr & UART_LCR_DLAB) {
362	ret = (s->divider >> 8) & 0xff;
363	} else {
364	ret = s->ier;
365	}
366	break;
367	case 2:
368	#ifndef IN_RING3
369	*pRC = VINF_IOM_HC_IOPORT_READ;
370	#else
371	ret = s->iir;
372	/* reset THR pending bit */
373	if ((ret & 0x7) == UART_IIR_THRI)
374	s->thr_ipending = 0;
375	/* reset msr changed bit */
376	s->msr_changed = false;
377	serial_update_irq(s);
378	#endif
379	break;
380	case 3:
381	ret = s->lcr;
382	break;
383	case 4:
384	ret = s->mcr;
385	break;
386	case 5:
387	ret = s->lsr;
388	break;
389	case 6:
390	if (s->mcr & UART_MCR_LOOP) {
391	/* in loopback, the modem output pins are connected to the
392	inputs */
393	ret = (s->mcr & 0x0c) << 4;
394	ret \|= (s->mcr & 0x02) << 3;
395	ret \|= (s->mcr & 0x01) << 5;
396	} else {
397	ret = s->msr;
398	/* Reset delta bits. */
399	s->msr &= ~UART_MSR_ANY_DELTA;
400	}
401	break;
402	case 7:
403	ret = s->scr;
404	break;
405	}
406	LogFlow(("serial: read addr=0x%02x val=0x%02x\n", addr, ret));
407	return ret;
408	}
409
410	#ifdef IN_RING3
411
412	static DECLCALLBACK(int) serialNotifyRead(PPDMICHARPORT pInterface, const void pvBuf, size_t pcbRead)
413	{
414	SerialState *pThis = PDMICHARPORT_2_SERIALSTATE(pInterface);
415	int rc;
416
417	Assert(*pcbRead != 0);
418
419	PDMCritSectEnter(&pThis->CritSect, VERR_PERMISSION_DENIED);
420	if (pThis->lsr & UART_LSR_DR)
421	{
422	/* If a character is still in the read queue, then wait for it to be emptied. */
423	PDMCritSectLeave(&pThis->CritSect);
424	rc = RTSemEventWait(pThis->ReceiveSem, 250);
425	if (RT_FAILURE(rc))
426	return rc;
427
428	PDMCritSectEnter(&pThis->CritSect, VERR_PERMISSION_DENIED);
429	}
430
431	if (!(pThis->lsr & UART_LSR_DR))
432	{
433	pThis->rbr = (const char )pvBuf;
434	pThis->lsr \|= UART_LSR_DR;
435	serial_update_irq(pThis);
436	*pcbRead = 1;
437	rc = VINF_SUCCESS;
438	}
439	else
440	rc = VERR_TIMEOUT;
441
442	PDMCritSectLeave(&pThis->CritSect);
443
444	return rc;
445	}
446
447	static DECLCALLBACK(int) serialNotifyStatusLinesChanged(PPDMICHARPORT pInterface, uint32_t newStatusLines)
448	{
449	SerialState *pThis = PDMICHARPORT_2_SERIALSTATE(pInterface);
450	uint8_t newMsr = 0;
451
452	Log(("%s: pInterface=%p newStatusLines=%u\n", __FUNCTION__, pInterface, newStatusLines));
453
454	PDMCritSectEnter(&pThis->CritSect, VERR_PERMISSION_DENIED);
455
456	/* Set new states. */
457	if (newStatusLines & PDM_ICHAR_STATUS_LINES_DCD)
458	newMsr \|= UART_MSR_DCD;
459	if (newStatusLines & PDM_ICHAR_STATUS_LINES_RI)
460	newMsr \|= UART_MSR_RI;
461	if (newStatusLines & PDM_ICHAR_STATUS_LINES_DSR)
462	newMsr \|= UART_MSR_DSR;
463	if (newStatusLines & PDM_ICHAR_STATUS_LINES_CTS)
464	newMsr \|= UART_MSR_CTS;
465
466	/* Compare the old and the new states and set the delta bits accordingly. */
467	if ((newMsr & UART_MSR_DCD) != (pThis->msr & UART_MSR_DCD))
468	newMsr \|= UART_MSR_DDCD;
469	if ((newMsr & UART_MSR_RI) == 1 && (pThis->msr & UART_MSR_RI) == 0)
470	newMsr \|= UART_MSR_TERI;
471	if ((newMsr & UART_MSR_DSR) != (pThis->msr & UART_MSR_DSR))
472	newMsr \|= UART_MSR_DDSR;
473	if ((newMsr & UART_MSR_CTS) != (pThis->msr & UART_MSR_CTS))
474	newMsr \|= UART_MSR_DCTS;
475
476	pThis->msr = newMsr;
477	pThis->msr_changed = true;
478	serial_update_irq(pThis);
479
480	PDMCritSectLeave(&pThis->CritSect);
481
482	return VINF_SUCCESS;
483	}
484
485	#endif /* IN_RING3 */
486
487	/**
488	* Port I/O Handler for OUT operations.
489	*
490	* @returns VBox status code.
491	*
492	* @param pDevIns The device instance.
493	* @param pvUser User argument.
494	* @param Port Port number used for the IN operation.
495	* @param u32 The value to output.
496	* @param cb The value size in bytes.
497	*/
498	PDMBOTHCBDECL(int) serialIOPortWrite(PPDMDEVINS pDevIns, void *pvUser,
499	RTIOPORT Port, uint32_t u32, unsigned cb)
500	{
501	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState );
502	int rc = VINF_SUCCESS;
503
504	if (cb == 1)
505	{
506	rc = PDMCritSectEnter(&pThis->CritSect, VINF_IOM_HC_IOPORT_WRITE);
507	if (rc == VINF_SUCCESS)
508	{
509	Log2(("%s: port %#06x val %#04x\n", __FUNCTION__, Port, u32));
510	rc = serial_ioport_write(pThis, Port, u32);
511	PDMCritSectLeave(&pThis->CritSect);
512	}
513	}
514	else
515	AssertMsgFailed(("Port=%#x cb=%d u32=%#x\n", Port, cb, u32));
516
517	return rc;
518	}
519
520	/**
521	* Port I/O Handler for IN operations.
522	*
523	* @returns VBox status code.
524	*
525	* @param pDevIns The device instance.
526	* @param pvUser User argument.
527	* @param Port Port number used for the IN operation.
528	* @param u32 The value to output.
529	* @param cb The value size in bytes.
530	*/
531	PDMBOTHCBDECL(int) serialIOPortRead(PPDMDEVINS pDevIns, void *pvUser,
532	RTIOPORT Port, uint32_t *pu32, unsigned cb)
533	{
534	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState );
535	int rc = VINF_SUCCESS;
536
537	if (cb == 1)
538	{
539	rc = PDMCritSectEnter(&pThis->CritSect, VINF_IOM_HC_IOPORT_READ);
540	if (rc == VINF_SUCCESS)
541	{
542	*pu32 = serial_ioport_read(pThis, Port, &rc);
543	Log2(("%s: port %#06x val %#04x\n", __FUNCTION__, Port, *pu32));
544	PDMCritSectLeave(&pThis->CritSect);
545	}
546	}
547	else
548	rc = VERR_IOM_IOPORT_UNUSED;
549
550	return rc;
551	}
552
553	#ifdef IN_RING3
554
555	/**
556	* Saves a state of the serial port device.
557	*
558	* @returns VBox status code.
559	* @param pDevIns The device instance.
560	* @param pSSMHandle The handle to save the state to.
561	*/
562	static DECLCALLBACK(int) serialSaveExec(PPDMDEVINS pDevIns,
563	PSSMHANDLE pSSMHandle)
564	{
565	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState );
566
567	SSMR3PutU16(pSSMHandle, pThis->divider);
568	SSMR3PutU8(pSSMHandle, pThis->rbr);
569	SSMR3PutU8(pSSMHandle, pThis->ier);
570	SSMR3PutU8(pSSMHandle, pThis->lcr);
571	SSMR3PutU8(pSSMHandle, pThis->mcr);
572	SSMR3PutU8(pSSMHandle, pThis->lsr);
573	SSMR3PutU8(pSSMHandle, pThis->msr);
574	SSMR3PutU8(pSSMHandle, pThis->scr);
575	SSMR3PutS32(pSSMHandle, pThis->thr_ipending);
576	SSMR3PutS32(pSSMHandle, pThis->irq);
577	SSMR3PutS32(pSSMHandle, pThis->last_break_enable);
578	SSMR3PutU32(pSSMHandle, pThis->base);
579	SSMR3PutBool(pSSMHandle, pThis->msr_changed);
580	return SSMR3PutU32(pSSMHandle, ~0); /* sanity/terminator */
581	}
582
583	/**
584	* Loads a saved serial port device state.
585	*
586	* @returns VBox status code.
587	* @param pDevIns The device instance.
588	* @param pSSMHandle The handle to the saved state.
589	* @param u32Version The data unit version number.
590	*/
591	static DECLCALLBACK(int) serialLoadExec(PPDMDEVINS pDevIns,
592	PSSMHANDLE pSSMHandle,
593	uint32_t u32Version)
594	{
595	int rc;
596	uint32_t u32;
597	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState );
598
599	if (u32Version != SERIAL_SAVED_STATE_VERSION)
600	{
601	AssertMsgFailed(("u32Version=%d\n", u32Version));
602	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
603	}
604
605	SSMR3GetU16(pSSMHandle, &pThis->divider);
606	SSMR3GetU8(pSSMHandle, &pThis->rbr);
607	SSMR3GetU8(pSSMHandle, &pThis->ier);
608	SSMR3GetU8(pSSMHandle, &pThis->lcr);
609	SSMR3GetU8(pSSMHandle, &pThis->mcr);
610	SSMR3GetU8(pSSMHandle, &pThis->lsr);
611	SSMR3GetU8(pSSMHandle, &pThis->msr);
612	SSMR3GetU8(pSSMHandle, &pThis->scr);
613	SSMR3GetS32(pSSMHandle, &pThis->thr_ipending);
614	SSMR3GetS32(pSSMHandle, &pThis->irq);
615	SSMR3GetS32(pSSMHandle, &pThis->last_break_enable);
616	SSMR3GetU32(pSSMHandle, &pThis->base);
617	SSMR3GetBool(pSSMHandle, &pThis->msr_changed);
618
619	rc = SSMR3GetU32(pSSMHandle, &u32);
620	if (RT_FAILURE(rc))
621	return rc;
622
623	if (u32 != ~0U)
624	{
625	AssertLogRelMsgFailed(("u32=%#x expected ~0\n", u32));
626	return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
627	}
628	/* Be careful with pointers in the structure; they are not preserved
629	* in the saved state. */
630
631	if (pThis->lsr & UART_LSR_DR)
632	{
633	int rc = RTSemEventSignal(pThis->ReceiveSem);
634	AssertRC(rc);
635	}
636
637	/* this isn't strictly necessary but cannot hurt... */
638	pThis->pDevInsR3 = pDevIns;
639	pThis->pDevInsR0 = PDMDEVINS_2_R0PTR(pDevIns);
640	pThis->pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
641	return VINF_SUCCESS;
642	}
643
644
645	/**
646	* @copydoc FNPDMDEVRELOCATE
647	*/
648	static DECLCALLBACK(void) serialRelocate(PPDMDEVINS pDevIns, RTGCINTPTR offDelta)
649	{
650	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState );
651	pThis->pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
652	}
653
654	#ifdef VBOX_SERIAL_PCI
655
656	static DECLCALLBACK(int) serialIOPortRegionMap(PPCIDEVICE pPciDev, /* unsigned */ int iRegion, RTGCPHYS GCPhysAddress, uint32_t cb, PCIADDRESSSPACE enmType)
657	{
658	SerialState *pThis = PCIDEV_2_SERIALSTATE(pPciDev);
659	int rc = VINF_SUCCESS;
660
661	Assert(enmType == PCI_ADDRESS_SPACE_IO);
662	Assert(iRegion == 0);
663	Assert(cb == 8);
664	AssertMsg(RT_ALIGN(GCPhysAddress, 8) == GCPhysAddress, ("Expected 8 byte alignment. GCPhysAddress=%#x\n", GCPhysAddress));
665
666	pThis->base = (RTIOPORT)GCPhysAddress;
667	LogRel(("Serial#%d: mapping I/O at %#06x\n", pThis->pDevIns->iInstance, pThis->base));
668
669	/*
670	* Register our port IO handlers.
671	*/
672	rc = PDMDevHlpIOPortRegister(pPciDev->pDevIns, (RTIOPORT)GCPhysAddress, 8, (void *)pThis,
673	serial_io_write, serial_io_read, NULL, NULL, "SERIAL");
674	AssertRC(rc);
675	return rc;
676	}
677
678	#endif /* VBOX_SERIAL_PCI */
679
680
681	/** @copyfrom PIBASE::pfnqueryInterface */
682	static DECLCALLBACK(void *) serialQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
683	{
684	SerialState *pThis = PDMIBASE_2_SERIALSTATE(pInterface);
685	switch (enmInterface)
686	{
687	case PDMINTERFACE_BASE:
688	return &pThis->IBase;
689	case PDMINTERFACE_CHAR_PORT:
690	return &pThis->ICharPort;
691	default:
692	return NULL;
693	}
694	}
695
696	/**
697	* Destruct a device instance.
698	*
699	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
700	* resources can be freed correctly.
701	*
702	* @returns VBox status.
703	* @param pDevIns The device instance data.
704	*/
705	static DECLCALLBACK(int) serialDestruct(PPDMDEVINS pDevIns)
706	{
707	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState );
708
709	RTSemEventDestroy(pThis->ReceiveSem);
710	pThis->ReceiveSem = NIL_RTSEMEVENT;
711
712	PDMR3CritSectDelete(&pThis->CritSect);
713	return VINF_SUCCESS;
714	}
715
716
717	/**
718	* Construct a device instance for a VM.
719	*
720	* @returns VBox status.
721	* @param pDevIns The device instance data.
722	* If the registration structure is needed, pDevIns->pDevReg points to it.
723	* @param iInstance Instance number. Use this to figure out which registers and such to use.
724	* The device number is also found in pDevIns->iInstance, but since it's
725	* likely to be freqently used PDM passes it as parameter.
726	* @param pCfgHandle Configuration node handle for the device. Use this to obtain the configuration
727	* of the device instance. It's also found in pDevIns->pCfgHandle, but like
728	* iInstance it's expected to be used a bit in this function.
729	*/
730	static DECLCALLBACK(int) serialConstruct(PPDMDEVINS pDevIns,
731	int iInstance,
732	PCFGMNODE pCfgHandle)
733	{
734	int rc;
735	SerialState pThis = PDMINS_2_DATA(pDevIns, SerialState);
736	uint16_t io_base;
737	uint8_t irq_lvl;
738
739	Assert(iInstance < 4);
740
741	/*
742	* Initialize the instance data.
743	* (Do this early or the destructor might choke on something!)
744	*/
745	pThis->pDevInsR3 = pDevIns;
746	pThis->pDevInsR0 = PDMDEVINS_2_R0PTR(pDevIns);
747	pThis->pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
748
749	pThis->lsr = UART_LSR_TEMT \| UART_LSR_THRE;
750	pThis->iir = UART_IIR_NO_INT;
751	pThis->msr = UART_MSR_DCD \| UART_MSR_DSR \| UART_MSR_CTS;
752
753	/* IBase */
754	pThis->IBase.pfnQueryInterface = serialQueryInterface;
755
756	/* ICharPort */
757	pThis->ICharPort.pfnNotifyRead = serialNotifyRead;
758	pThis->ICharPort.pfnNotifyStatusLinesChanged = serialNotifyStatusLinesChanged;
759
760	#ifdef VBOX_SERIAL_PCI
761	/* the PCI device */
762	pThis->dev.config[0x00] = 0xee; /* Vendor: ??? */
763	pThis->dev.config[0x01] = 0x80;
764	pThis->dev.config[0x02] = 0x01; /* Device: ??? */
765	pThis->dev.config[0x03] = 0x01;
766	pThis->dev.config[0x04] = PCI_COMMAND_IOACCESS;
767	pThis->dev.config[0x09] = 0x01; /* Programming interface: 16450 */
768	pThis->dev.config[0x0a] = 0x00; /* Subclass: Serial controller */
769	pThis->dev.config[0x0b] = 0x07; /* Class: Communication controller */
770	pThis->dev.config[0x0e] = 0x00; /* Header type: standard */
771	pThis->dev.config[0x3c] = irq_lvl; /* preconfigure IRQ number (0 = autoconfig)*/
772	pThis->dev.config[0x3d] = 1; /* interrupt pin 0 */
773	#endif /* VBOX_SERIAL_PCI */
774
775	/*
776	* Validate and read the configuration.
777	*/
778	if (!CFGMR3AreValuesValid(pCfgHandle, "IRQ\0" "IOBase\0" "GCEnabled\0" "R0Enabled\0"))
779	{
780	AssertMsgFailed(("serialConstruct Invalid configuration values\n"));
781	return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
782	}
783
784	rc = CFGMR3QueryBoolDef(pCfgHandle, "GCEnabled", &pThis->fGCEnabled, true);
785	if (RT_FAILURE(rc))
786	return PDMDEV_SET_ERROR(pDevIns, rc,
787	N_("Configuration error: Failed to get the \"GCEnabled\" value"));
788
789	rc = CFGMR3QueryBoolDef(pCfgHandle, "R0Enabled", &pThis->fR0Enabled, true);
790	if (RT_FAILURE(rc))
791	return PDMDEV_SET_ERROR(pDevIns, rc,
792	N_("Configuration error: Failed to get the \"R0Enabled\" value"));
793
794	rc = CFGMR3QueryU8(pCfgHandle, "IRQ", &irq_lvl);
795	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
796	{
797	/* Provide sensible defaults. */
798	if (iInstance == 0)
799	irq_lvl = 4;
800	else if (iInstance == 1)
801	irq_lvl = 3;
802	else
803	AssertReleaseFailed(); /* irq_lvl is undefined. */
804	}
805	else if (RT_FAILURE(rc))
806	return PDMDEV_SET_ERROR(pDevIns, rc,
807	N_("Configuration error: Failed to get the \"IRQ\" value"));
808
809	rc = CFGMR3QueryU16(pCfgHandle, "IOBase", &io_base);
810	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
811	{
812	if (iInstance == 0)
813	io_base = 0x3f8;
814	else if (iInstance == 1)
815	io_base = 0x2f8;
816	else
817	AssertReleaseFailed(); /* io_base is undefined */
818	}
819	else if (RT_FAILURE(rc))
820	return PDMDEV_SET_ERROR(pDevIns, rc,
821	N_("Configuration error: Failed to get the \"IOBase\" value"));
822
823	Log(("DevSerial: instance %d iobase=%04x irq=%d\n", iInstance, io_base, irq_lvl));
824
825	pThis->irq = irq_lvl;
826	#ifdef VBOX_SERIAL_PCI
827	pThis->base = -1;
828	#else
829	pThis->base = io_base;
830	#endif
831
832	/*
833	* Initialize critical section and the semaphore.
834	* This must of course be done before attaching drivers or anything else which can call us back..
835	*/
836	char szName[24];
837	RTStrPrintf(szName, sizeof(szName), "Serial#%d", iInstance);
838	rc = PDMDevHlpCritSectInit(pDevIns, &pThis->CritSect, szName);
839	if (RT_FAILURE(rc))
840	return rc;
841
842	rc = RTSemEventCreate(&pThis->ReceiveSem);
843	AssertRC(rc);
844
845	#ifdef VBOX_SERIAL_PCI
846	/*
847	* Register the PCI Device and region.
848	*/
849	rc = PDMDevHlpPCIRegister(pDevIns, &pThis->dev);
850	if (RT_FAILURE(rc))
851	return rc;
852	rc = PDMDevHlpPCIIORegionRegister(pDevIns, 0, 8, PCI_ADDRESS_SPACE_IO, serialIOPortRegionMap);
853	if (RT_FAILURE(rc))
854	return rc;
855
856	#else /* !VBOX_SERIAL_PCI */
857	/*
858	* Register the I/O ports.
859	*/
860	pThis->base = io_base;
861	rc = PDMDevHlpIOPortRegister(pDevIns, io_base, 8, 0,
862	serialIOPortWrite, serialIOPortRead,
863	NULL, NULL, "SERIAL");
864	if (RT_FAILURE(rc))
865	return rc;
866
867	if (pThis->fGCEnabled)
868	rc = PDMDevHlpIOPortRegisterGC(pDevIns, io_base, 8, 0, "serialIOPortWrite",
869	"serialIOPortRead", NULL, NULL, "Serial");
870
871	if (pThis->fR0Enabled)
872	rc = PDMDevHlpIOPortRegisterR0(pDevIns, io_base, 8, 0, "serialIOPortWrite",
873	"serialIOPortRead", NULL, NULL, "Serial");
874	#endif /* !VBOX_SERIAL_PCI */
875
876	/*
877	* Saved state.
878	*/
879	rc = PDMDevHlpSSMRegister(
880	pDevIns, /* pDevIns */
881	pDevIns->pDevReg->szDeviceName, /* pszName */
882	iInstance, /* u32Instance */
883	SERIAL_SAVED_STATE_VERSION, /* u32Version */
884	sizeof (pThis), / cbGuess */
885	NULL, /* pfnSavePrep */
886	serialSaveExec, /* pfnSaveExec */
887	NULL, /* pfnSaveDone */
888	NULL, /* pfnLoadPrep */
889	serialLoadExec, /* pfnLoadExec */
890	NULL /* pfnLoadDone */
891	);
892	if (RT_FAILURE(rc))
893	return rc;
894
895	/*
896	* Attach the char driver and get the interfaces.
897	* For now no run-time changes are supported.
898	*/
899	rc = PDMDevHlpDriverAttach(pDevIns, 0, &pThis->IBase, &pThis->pDrvBase, "Serial Char");
900	if (RT_SUCCESS(rc))
901	{
902	pThis->pDrvChar = (PDMICHAR *)pThis->pDrvBase->pfnQueryInterface(pThis->pDrvBase, PDMINTERFACE_CHAR);
903	if (!pThis->pDrvChar)
904	{
905	AssertLogRelMsgFailed(("Configuration error: instance %d has no char interface!\n", iInstance));
906	return VERR_PDM_MISSING_INTERFACE;
907	}
908	/** @todo provide read notification interface!!!! */
909	}
910	else if (rc == VERR_PDM_NO_ATTACHED_DRIVER)
911	{
912	pThis->pDrvBase = NULL;
913	pThis->pDrvChar = NULL;
914	LogRel(("Serial%d: no unit\n", iInstance));
915	}
916	else
917	{
918	AssertLogRelMsgFailed(("Serial%d: Failed to attach to char driver. rc=%Rrc\n", iInstance, rc));
919	/* Don't call VMSetError here as we assume that the driver already set an appropriate error */
920	return rc;
921	}
922
923	return VINF_SUCCESS;
924	}
925
926
927	/**
928	* The device registration structure.
929	*/
930	const PDMDEVREG g_DeviceSerialPort =
931	{
932	/* u32Version */
933	PDM_DEVREG_VERSION,
934	/* szDeviceName */
935	"serial",
936	/* szRCMod */
937	"VBoxDDGC.gc",
938	/* szR0Mod */
939	"VBoxDDR0.r0",
940	/* pszDescription */
941	"Serial Communication Port",
942	/* fFlags */
943	PDM_DEVREG_FLAGS_DEFAULT_BITS \| PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0,
944	/* fClass */
945	PDM_DEVREG_CLASS_SERIAL,
946	/* cMaxInstances */
947	1,
948	/* cbInstance */
949	sizeof(SerialState),
950	/* pfnConstruct */
951	serialConstruct,
952	/* pfnDestruct */
953	serialDestruct,
954	/* pfnRelocate */
955	serialRelocate,
956	/* pfnIOCtl */
957	NULL,
958	/* pfnPowerOn */
959	NULL,
960	/* pfnReset */
961	NULL,
962	/* pfnSuspend */
963	NULL,
964	/* pfnResume */
965	NULL,
966	/* pfnAttach */
967	NULL,
968	/* pfnDetach */
969	NULL,
970	/* pfnQueryInterface. */
971	NULL,
972	/* pfnInitComplete */
973	NULL,
974	/* pfnPowerOff */
975	NULL,
976	/* pfnSoftReset */
977	NULL,
978	/* u32VersionEnd */
979	PDM_DEVREG_VERSION
980	};
981	#endif /* IN_RING3 */
982
983
984	#endif /* !VBOX_DEVICE_STRUCT_TESTCASE */

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source: vbox/trunk/src/VBox/Devices/Serial/DevSerial.cpp@ 14831

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