DevFdc.cpp@ 77807

Last change on this file since 77807 was 77043, checked in by vboxsync, 6 years ago
FDC: Double density 720K floppies need 300 kbps data rate in a 5.25 drive, just like other DD media.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 101.6 KB

Line
1	/* $Id: DevFdc.cpp 77043 2019-01-30 13:05:21Z vboxsync $ */
2	/** @file
3	* VBox storage devices - Floppy disk controller
4	*/
5
6	/*
7	* Copyright (C) 2006-2019 Oracle Corporation
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	*
18	* This code is based on:
19	*
20	* QEMU Floppy disk emulator (Intel 82078)
21	*
22	* Copyright (c) 2003 Jocelyn Mayer
23	*
24	* Permission is hereby granted, free of charge, to any person obtaining a copy
25	* of this software and associated documentation files (the "Software"), to deal
26	* in the Software without restriction, including without limitation the rights
27	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
28	* copies of the Software, and to permit persons to whom the Software is
29	* furnished to do so, subject to the following conditions:
30	*
31	* The above copyright notice and this permission notice shall be included in
32	* all copies or substantial portions of the Software.
33	*
34	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
35	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
36	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
37	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
38	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
39	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
40	* THE SOFTWARE.
41	*
42	*/
43
44
45	/*********************************************************************************************************************************
46	* Header Files *
47	*********************************************************************************************************************************/
48	#define LOG_GROUP LOG_GROUP_DEV_FDC
49	#include <VBox/vmm/pdmdev.h>
50	#include <VBox/vmm/pdmstorageifs.h>
51	#include <iprt/assert.h>
52	#include <iprt/string.h>
53	#include <iprt/uuid.h>
54
55	#include "VBoxDD.h"
56
57	#define FDC_SAVESTATE_CURRENT 2 /* The new and improved saved state. */
58	#define FDC_SAVESTATE_OLD 1 /* The original saved state. */
59
60	#define MAX_FD 2
61
62
63	/********************************************************/
64	/* debug Floppy devices */
65	/* #define DEBUG_FLOPPY */
66
67	#ifndef VBOX
68	#ifdef DEBUG_FLOPPY
69	#define FLOPPY_DPRINTF(fmt, args...) \
70	do { printf("FLOPPY: " fmt , ##args); } while (0)
71	#endif
72	#else /* !VBOX */
73	# ifdef LOG_ENABLED
74	# define FLOPPY_DPRINTF(...) Log(("floppy: " __VA_ARGS__))
75	# else
76	# define FLOPPY_DPRINTF(...) do { } while (0)
77	# endif
78	#endif /* !VBOX */
79
80	#ifndef VBOX
81	#define FLOPPY_ERROR(fmt, args...) \
82	do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
83	#else /* VBOX */
84	# define FLOPPY_ERROR RTLogPrintf
85	#endif /* VBOX */
86
87	#ifdef VBOX
88	typedef struct fdctrl_t fdctrl_t;
89	#endif /* VBOX */
90
91	/********************************************************/
92	/* Floppy drive emulation */
93
94	#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
95	#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
96
97	/* Will always be a fixed parameter for us */
98	#define FD_SECTOR_LEN 512
99	#define FD_SECTOR_SC 2 /* Sector size code */
100	#define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */
101
102	/* Floppy disk drive emulation */
103	typedef enum fdrive_type_t {
104	FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
105	FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
106	FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
107	FDRIVE_DRV_NONE = 0x03 /* No drive connected */
108	#ifdef VBOX
109	, FDRIVE_DRV_FAKE_15_6 = 0x0e /* Fake 15.6 MB drive. */
110	, FDRIVE_DRV_FAKE_63_5 = 0x0f /* Fake 63.5 MB drive. */
111	#endif
112	} fdrive_type_t;
113
114	typedef uint8_t fdrive_flags_t;
115	#define FDISK_DBL_SIDES UINT8_C(0x01)
116
117	typedef enum fdrive_rate_t {
118	FDRIVE_RATE_500K = 0x00, /* 500 Kbps */
119	FDRIVE_RATE_300K = 0x01, /* 300 Kbps */
120	FDRIVE_RATE_250K = 0x02, /* 250 Kbps */
121	FDRIVE_RATE_1M = 0x03 /* 1 Mbps */
122	} fdrive_rate_t;
123
124	/**
125	* The status for one drive.
126	*
127	* @implements PDMIBASE
128	* @implements PDMIMEDIAPORT
129	* @implements PDMIMOUNTNOTIFY
130	*/
131	typedef struct fdrive_t {
132	#ifndef VBOX
133	BlockDriverState *bs;
134	#else /* VBOX */
135	/** Pointer to the owning device instance. */
136	R3PTRTYPE(PPDMDEVINS) pDevIns;
137	/** Pointer to the attached driver's base interface. */
138	R3PTRTYPE(PPDMIBASE) pDrvBase;
139	/** Pointer to the attached driver's block interface. */
140	R3PTRTYPE(PPDMIMEDIA) pDrvMedia;
141	/** Pointer to the attached driver's mount interface.
142	* This is NULL if the driver isn't a removable unit. */
143	R3PTRTYPE(PPDMIMOUNT) pDrvMount;
144	/** The base interface. */
145	PDMIBASE IBase;
146	/** The block port interface. */
147	PDMIMEDIAPORT IPort;
148	/** The mount notify interface. */
149	PDMIMOUNTNOTIFY IMountNotify;
150	/** The LUN #. */
151	RTUINT iLUN;
152	/** The LED for this LUN. */
153	PDMLED Led;
154	#endif
155	/* Drive status */
156	fdrive_type_t drive;
157	uint8_t perpendicular; /* 2.88 MB access mode */
158	uint8_t dsk_chg; /* Disk change line */
159	/* Position */
160	uint8_t head;
161	uint8_t track;
162	uint8_t sect;
163	uint8_t ltrk; /* Logical track */
164	/* Media */
165	fdrive_flags_t flags;
166	uint8_t last_sect; /* Nb sector per track */
167	uint8_t max_track; /* Nb of tracks */
168	uint16_t bps; /* Bytes per sector */
169	uint8_t ro; /* Is read-only */
170	uint8_t media_rate; /* Data rate of medium */
171	} fdrive_t;
172
173	#define NUM_SIDES(drv) (drv->flags & FDISK_DBL_SIDES ? 2 : 1)
174
175	static void fd_init(fdrive_t *drv, bool fInit)
176	{
177	/* Drive */
178	#ifndef VBOX
179	drv->drive = FDRIVE_DRV_NONE;
180	#else /* VBOX */
181	if (fInit) {
182	/* Fixate the drive type at init time if possible. */
183	if (drv->pDrvMedia) {
184	PDMMEDIATYPE enmType = drv->pDrvMedia->pfnGetType(drv->pDrvMedia);
185	switch (enmType) {
186	case PDMMEDIATYPE_FLOPPY_360:
187	case PDMMEDIATYPE_FLOPPY_1_20:
188	drv->drive = FDRIVE_DRV_120;
189	break;
190	case PDMMEDIATYPE_FLOPPY_720:
191	case PDMMEDIATYPE_FLOPPY_1_44:
192	drv->drive = FDRIVE_DRV_144;
193	break;
194	default:
195	AssertFailed();
196	RT_FALL_THRU();
197	case PDMMEDIATYPE_FLOPPY_2_88:
198	drv->drive = FDRIVE_DRV_288;
199	break;
200	case PDMMEDIATYPE_FLOPPY_FAKE_15_6:
201	drv->drive = FDRIVE_DRV_FAKE_15_6;
202	break;
203	case PDMMEDIATYPE_FLOPPY_FAKE_63_5:
204	drv->drive = FDRIVE_DRV_FAKE_63_5;
205	break;
206	}
207	} else {
208	drv->drive = FDRIVE_DRV_NONE;
209	}
210	} /* else: The BIOS (and others) get the drive type via the CMOS, so
211	don't change it after the VM has been constructed. */
212	#endif /* VBOX */
213	drv->perpendicular = 0;
214	/* Disk */
215	drv->last_sect = 0;
216	drv->max_track = 0;
217	}
218
219	static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
220	uint8_t last_sect, uint8_t num_sides)
221	{
222	return (((track * num_sides) + head) * last_sect) + sect - 1; /* sect >= 1 */
223	}
224
225	/* Returns current position, in sectors, for given drive */
226	static int fd_sector(fdrive_t *drv)
227	{
228	return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, NUM_SIDES(drv));
229	}
230
231	/* Seek to a new position:
232	* returns 0 if already on right track
233	* returns 1 if track changed
234	* returns 2 if track is invalid
235	* returns 3 if sector is invalid
236	* returns 4 if seek is disabled
237	* returns 5 if no media in drive
238	*/
239	static int fd_seek(fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
240	int enable_seek)
241	{
242	int sector;
243	int ret;
244
245	if (!drv->last_sect) {
246	FLOPPY_DPRINTF("no disk in drive (max=%d %d %02x %02x)\n",
247	1, (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
248	drv->max_track, drv->last_sect);
249	return 5;
250	}
251	if (track > drv->max_track \|\|
252	(head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
253	FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
254	head, track, sect, 1,
255	(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
256	drv->max_track, drv->last_sect);
257	return 2;
258	}
259	if (sect > drv->last_sect \|\| sect < 1) {
260	FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
261	head, track, sect, 1,
262	(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
263	drv->max_track, drv->last_sect);
264	return 3;
265	}
266	sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
267	ret = 0;
268	if (sector != fd_sector(drv)) {
269	#if 0
270	if (!enable_seek) {
271	FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
272	head, track, sect, 1, drv->max_track, drv->last_sect);
273	return 4;
274	}
275	#else
276	RT_NOREF(enable_seek);
277	#endif
278	drv->head = head;
279	if (drv->track != track)
280	ret = 1;
281	drv->track = track;
282	drv->sect = sect;
283	}
284	drv->ltrk = drv->track;
285
286	return ret;
287	}
288
289	/* Set drive back to track 0 */
290	static void fd_recalibrate(fdrive_t *drv)
291	{
292	FLOPPY_DPRINTF("recalibrate\n");
293	drv->head = 0;
294	drv->track = 0;
295	drv->ltrk = 0;
296	drv->sect = 1;
297	}
298
299	/* Recognize floppy formats */
300	typedef struct fd_format_t {
301	fdrive_type_t drive;
302	uint8_t last_sect; /*< Number of sectors. /
303	uint8_t max_track; /*< Number of tracks. /
304	uint8_t max_head; /*< Max head number. /
305	fdrive_rate_t rate;
306	const char *str;
307	} fd_format_t;
308
309	/* Note: Low-density disks (160K/180K/320K/360K) use 250 Kbps data rate
310	* in 40-track drives, but 300 Kbps in high-capacity 80-track drives.
311	*/
312	static fd_format_t fd_formats[] = {
313	/* First entry is default format */
314	/* 1.44 MB 3"1/2 floppy disks */
315	{ FDRIVE_DRV_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 3\"1/2", },
316	{ FDRIVE_DRV_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 3\"1/2", },
317	{ FDRIVE_DRV_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB 3\"1/2", },
318	{ FDRIVE_DRV_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB 3\"1/2", },
319	{ FDRIVE_DRV_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB 3\"1/2", },
320	{ FDRIVE_DRV_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB 3\"1/2", },
321	{ FDRIVE_DRV_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB 3\"1/2", },
322	{ FDRIVE_DRV_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB 3\"1/2", },
323	/* 2.88 MB 3"1/2 floppy disks */
324	{ FDRIVE_DRV_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB 3\"1/2", },
325	{ FDRIVE_DRV_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB 3\"1/2", },
326	{ FDRIVE_DRV_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB 3\"1/2", },
327	{ FDRIVE_DRV_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB 3\"1/2", },
328	{ FDRIVE_DRV_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB 3\"1/2", },
329	/* 720 kB 3"1/2 floppy disks */
330	{ FDRIVE_DRV_144, 9, 80, 1, FDRIVE_RATE_250K, "720 kB 3\"1/2", },
331	{ FDRIVE_DRV_144, 10, 80, 1, FDRIVE_RATE_250K, "800 kB 3\"1/2", },
332	{ FDRIVE_DRV_144, 10, 82, 1, FDRIVE_RATE_250K, "820 kB 3\"1/2", },
333	{ FDRIVE_DRV_144, 10, 83, 1, FDRIVE_RATE_250K, "830 kB 3\"1/2", },
334	{ FDRIVE_DRV_144, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB 3\"1/2", },
335	{ FDRIVE_DRV_144, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB 3\"1/2", },
336	/* 1.2 MB 5"1/4 floppy disks */
337	{ FDRIVE_DRV_120, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 5\"1/4", },
338	{ FDRIVE_DRV_120, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 5\"1/4", }, /* CP Backup 5.25" HD */
339	{ FDRIVE_DRV_120, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 5\"1/4", },
340	{ FDRIVE_DRV_120, 18, 82, 1, FDRIVE_RATE_500K, "1.48 MB 5\"1/4", },
341	{ FDRIVE_DRV_120, 18, 83, 1, FDRIVE_RATE_500K, "1.49 MB 5\"1/4", },
342	{ FDRIVE_DRV_120, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 5\"1/4", },
343	/* 720 kB 5"1/4 floppy disks */
344	{ FDRIVE_DRV_120, 9, 80, 1, FDRIVE_RATE_300K, "720 kB 5\"1/4", },
345	{ FDRIVE_DRV_120, 11, 80, 1, FDRIVE_RATE_300K, "880 kB 5\"1/4", },
346	/* 360 kB 5"1/4 floppy disks (newer 9-sector formats) */
347	{ FDRIVE_DRV_120, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 5\"1/4", },
348	{ FDRIVE_DRV_120, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 5\"1/4", },
349	{ FDRIVE_DRV_120, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 5\"1/4", }, /* CP Backup 5.25" DD */
350	{ FDRIVE_DRV_120, 10, 41, 1, FDRIVE_RATE_300K, "410 kB 5\"1/4", },
351	{ FDRIVE_DRV_120, 10, 42, 1, FDRIVE_RATE_300K, "420 kB 5\"1/4", },
352	/* 320 kB 5"1/4 floppy disks (old 8-sector formats) */
353	{ FDRIVE_DRV_120, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 5\"1/4", },
354	{ FDRIVE_DRV_120, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 5\"1/4", },
355	/* 1.2 MB and low density 3"1/2 floppy 'aliases' */
356	{ FDRIVE_DRV_144, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 3\"1/2", },
357	{ FDRIVE_DRV_144, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 3\"1/2", },
358	{ FDRIVE_DRV_144, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 3\"1/2", }, /* CP Backup 5.25" DD */
359	{ FDRIVE_DRV_144, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 3\"1/2", },
360	{ FDRIVE_DRV_144, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 3\"1/2", },
361	{ FDRIVE_DRV_144, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 3\"1/2", },
362	{ FDRIVE_DRV_144, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 3\"1/2", },
363	#ifdef VBOX /* For larger than real life floppy images (see DrvBlock.cpp). */
364	/* 15.6 MB fake floppy disk (just need something big). */
365	{ FDRIVE_DRV_FAKE_15_6, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 15.6", },
366	{ FDRIVE_DRV_FAKE_15_6, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 15.6", },
367	{ FDRIVE_DRV_FAKE_15_6, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 15.6", },
368	{ FDRIVE_DRV_FAKE_15_6, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 15.6", },
369	{ FDRIVE_DRV_FAKE_15_6, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 15.6", },
370	{ FDRIVE_DRV_FAKE_15_6, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 15.6", },
371	{ FDRIVE_DRV_FAKE_15_6, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 15.6", },
372	{ FDRIVE_DRV_FAKE_15_6, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 15.6", },
373	{ FDRIVE_DRV_FAKE_15_6, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 15.6", },
374	{ FDRIVE_DRV_FAKE_15_6, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 15.6", },
375	{ FDRIVE_DRV_FAKE_15_6, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 15.6", },
376	{ FDRIVE_DRV_FAKE_15_6, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 15.6", },
377	{ FDRIVE_DRV_FAKE_15_6, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 15.6", },
378	{ FDRIVE_DRV_FAKE_15_6, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 15.6", },
379	{ FDRIVE_DRV_FAKE_15_6, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 15.6", },
380	{ FDRIVE_DRV_FAKE_15_6, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 15.6", },
381	{ FDRIVE_DRV_FAKE_15_6, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 15.6", },
382	{ FDRIVE_DRV_FAKE_15_6, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 15.6", },
383	{ FDRIVE_DRV_FAKE_15_6, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 15.6", },
384	{ FDRIVE_DRV_FAKE_15_6, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 15.6", },
385	{ FDRIVE_DRV_FAKE_15_6, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 15.6", },
386	/* 63.5 MB fake floppy disk (just need something big). */
387	{ FDRIVE_DRV_FAKE_63_5, 255, 255, 1, FDRIVE_RATE_1M, "63.5 MB fake 63.5", },
388	{ FDRIVE_DRV_FAKE_63_5, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 63.5", },
389	{ FDRIVE_DRV_FAKE_63_5, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 63.5", },
390	{ FDRIVE_DRV_FAKE_63_5, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 63.5", },
391	{ FDRIVE_DRV_FAKE_63_5, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 63.5", },
392	{ FDRIVE_DRV_FAKE_63_5, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 63.5", },
393	{ FDRIVE_DRV_FAKE_63_5, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 63.5", },
394	{ FDRIVE_DRV_FAKE_63_5, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 63.5", },
395	{ FDRIVE_DRV_FAKE_63_5, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 63.5", },
396	{ FDRIVE_DRV_FAKE_63_5, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 63.5", },
397	{ FDRIVE_DRV_FAKE_63_5, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 63.5", },
398	{ FDRIVE_DRV_FAKE_63_5, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 63.5", },
399	{ FDRIVE_DRV_FAKE_63_5, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 63.5", },
400	{ FDRIVE_DRV_FAKE_63_5, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 63.5", },
401	{ FDRIVE_DRV_FAKE_63_5, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 63.5", },
402	{ FDRIVE_DRV_FAKE_63_5, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 63.5", },
403	{ FDRIVE_DRV_FAKE_63_5, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 63.5", },
404	{ FDRIVE_DRV_FAKE_63_5, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 63.5", },
405	{ FDRIVE_DRV_FAKE_63_5, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 63.5", },
406	{ FDRIVE_DRV_FAKE_63_5, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 63.5", },
407	{ FDRIVE_DRV_FAKE_63_5, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 63.5", },
408	{ FDRIVE_DRV_FAKE_63_5, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 63.5", },
409	#endif
410	/* end */
411	{ FDRIVE_DRV_NONE, (uint8_t)-1, (uint8_t)-1, 0, (fdrive_rate_t)0, NULL, },
412	};
413
414	/* Revalidate a disk drive after a disk change */
415	static void fd_revalidate(fdrive_t *drv)
416	{
417	const fd_format_t *parse;
418	uint64_t nb_sectors, size;
419	int i, first_match, match;
420	int nb_heads, max_track, last_sect, ro;
421
422	FLOPPY_DPRINTF("revalidate\n");
423	#ifndef VBOX
424	if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
425	ro = bdrv_is_read_only(drv->bs);
426	bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
427	#else /* VBOX */
428	if ( drv->pDrvMedia
429	&& drv->pDrvMount
430	&& drv->pDrvMount->pfnIsMounted (drv->pDrvMount)) {
431	ro = drv->pDrvMedia->pfnIsReadOnly (drv->pDrvMedia);
432	nb_heads = max_track = last_sect = 0;
433	#endif /* VBOX */
434	if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
435	FLOPPY_DPRINTF("User defined disk (%d %d %d)",
436	nb_heads - 1, max_track, last_sect);
437	} else {
438	#ifndef VBOX
439	bdrv_get_geometry(drv->bs, &nb_sectors);
440	#else /* VBOX */
441	{
442	uint64_t size2 = drv->pDrvMedia->pfnGetSize (drv->pDrvMedia);
443	nb_sectors = size2 / FD_SECTOR_LEN;
444	}
445	#endif /* VBOX */
446	match = -1;
447	first_match = -1;
448	for (i = 0;; i++) {
449	parse = &fd_formats[i];
450	if (parse->drive == FDRIVE_DRV_NONE)
451	break;
452	if (drv->drive == parse->drive \|\|
453	drv->drive == FDRIVE_DRV_NONE) {
454	size = (parse->max_head + 1) * parse->max_track *
455	parse->last_sect;
456	if (nb_sectors == size) {
457	match = i;
458	break;
459	}
460	if (first_match == -1)
461	first_match = i;
462	}
463	}
464	if (match == -1) {
465	if (first_match == -1)
466	match = 1;
467	else
468	match = first_match;
469	parse = &fd_formats[match];
470	}
471	nb_heads = parse->max_head + 1;
472	max_track = parse->max_track;
473	last_sect = parse->last_sect;
474	drv->drive = parse->drive;
475	#ifdef VBOX
476	drv->media_rate = parse->rate;
477	#endif
478	FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
479	nb_heads, max_track, last_sect, ro ? "ro" : "rw");
480	LogRel(("FDC: %s floppy disk (%d h %d t %d s) %s\n", parse->str,
481	nb_heads, max_track, last_sect, ro ? "ro" : "rw"));
482	}
483	if (nb_heads == 1) {
484	drv->flags &= ~FDISK_DBL_SIDES;
485	} else {
486	drv->flags \|= FDISK_DBL_SIDES;
487	}
488	drv->max_track = max_track;
489	drv->last_sect = last_sect;
490	drv->ro = ro;
491	} else {
492	FLOPPY_DPRINTF("No disk in drive\n");
493	drv->last_sect = 0;
494	drv->max_track = 0;
495	drv->flags &= ~FDISK_DBL_SIDES;
496	drv->dsk_chg = true; /* Disk change line active. */
497	}
498	}
499
500	/********************************************************/
501	/* Intel 82078 floppy disk controller emulation */
502
503	static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq);
504	static void fdctrl_reset_fifo(fdctrl_t *fdctrl);
505	#ifndef VBOX
506	static int fdctrl_transfer_handler (void *opaque, int nchan,
507	int dma_pos, int dma_len);
508	#else /* VBOX: */
509	static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
510	void *opaque,
511	unsigned nchan,
512	uint32_t dma_pos,
513	uint32_t dma_len);
514	#endif /* VBOX */
515	static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0);
516	static fdrive_t get_cur_drv(fdctrl_t fdctrl);
517
518	static void fdctrl_result_timer(void *opaque);
519	static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl);
520	static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl);
521	static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl);
522	static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value);
523	static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl);
524	static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value);
525	static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl);
526	static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value);
527	static uint32_t fdctrl_read_data(fdctrl_t *fdctrl);
528	static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value);
529	static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl);
530	static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value);
531
532	enum {
533	FD_DIR_WRITE = 0,
534	FD_DIR_READ = 1,
535	FD_DIR_SCANE = 2,
536	FD_DIR_SCANL = 3,
537	FD_DIR_SCANH = 4,
538	FD_DIR_FORMAT = 5
539	};
540
541	enum {
542	FD_STATE_MULTI = 0x01, /* multi track flag */
543	FD_STATE_FORMAT = 0x02, /* format flag */
544	FD_STATE_SEEK = 0x04 /* seek flag */
545	};
546
547	enum {
548	FD_REG_SRA = 0x00,
549	FD_REG_SRB = 0x01,
550	FD_REG_DOR = 0x02,
551	FD_REG_TDR = 0x03,
552	FD_REG_MSR = 0x04,
553	FD_REG_DSR = 0x04,
554	FD_REG_FIFO = 0x05,
555	FD_REG_DIR = 0x07,
556	FD_REG_CCR = 0x07
557	};
558
559	enum {
560	FD_CMD_READ_TRACK = 0x02,
561	FD_CMD_SPECIFY = 0x03,
562	FD_CMD_SENSE_DRIVE_STATUS = 0x04,
563	FD_CMD_WRITE = 0x05,
564	FD_CMD_READ = 0x06,
565	FD_CMD_RECALIBRATE = 0x07,
566	FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
567	FD_CMD_WRITE_DELETED = 0x09,
568	FD_CMD_READ_ID = 0x0a,
569	FD_CMD_READ_DELETED = 0x0c,
570	FD_CMD_FORMAT_TRACK = 0x0d,
571	FD_CMD_DUMPREG = 0x0e,
572	FD_CMD_SEEK = 0x0f,
573	FD_CMD_VERSION = 0x10,
574	FD_CMD_SCAN_EQUAL = 0x11,
575	FD_CMD_PERPENDICULAR_MODE = 0x12,
576	FD_CMD_CONFIGURE = 0x13,
577	FD_CMD_LOCK = 0x14,
578	FD_CMD_VERIFY = 0x16,
579	FD_CMD_POWERDOWN_MODE = 0x17,
580	FD_CMD_PART_ID = 0x18,
581	FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
582	FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
583	FD_CMD_SAVE = 0x2e,
584	FD_CMD_OPTION = 0x33,
585	FD_CMD_RESTORE = 0x4e,
586	FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
587	FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
588	FD_CMD_FORMAT_AND_WRITE = 0xcd,
589	FD_CMD_RELATIVE_SEEK_IN = 0xcf
590	};
591
592	enum {
593	FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
594	FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
595	FD_CONFIG_POLL = 0x10, /* Poll enabled */
596	FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
597	FD_CONFIG_EIS = 0x40 /* No implied seeks */
598	};
599
600	enum {
601	FD_SR0_EQPMT = 0x10,
602	FD_SR0_SEEK = 0x20,
603	FD_SR0_ABNTERM = 0x40,
604	FD_SR0_INVCMD = 0x80,
605	FD_SR0_RDYCHG = 0xc0
606	};
607
608	enum {
609	FD_SR1_MA = 0x01, /* Missing address mark */
610	FD_SR1_NW = 0x02, /* Not writable */
611	FD_SR1_ND = 0x04, /* No data */
612	FD_SR1_EC = 0x80 /* End of cylinder */
613	};
614
615	enum {
616	FD_SR2_MD = 0x01, /* Missing data address mark */
617	FD_SR2_SNS = 0x04, /* Scan not satisfied */
618	FD_SR2_SEH = 0x08 /* Scan equal hit */
619	};
620
621	enum {
622	FD_SRA_DIR = 0x01,
623	FD_SRA_nWP = 0x02,
624	FD_SRA_nINDX = 0x04,
625	FD_SRA_HDSEL = 0x08,
626	FD_SRA_nTRK0 = 0x10,
627	FD_SRA_STEP = 0x20,
628	FD_SRA_nDRV2 = 0x40,
629	FD_SRA_INTPEND = 0x80
630	};
631
632	enum {
633	FD_SRB_MTR0 = 0x01,
634	FD_SRB_MTR1 = 0x02,
635	FD_SRB_WGATE = 0x04,
636	FD_SRB_RDATA = 0x08,
637	FD_SRB_WDATA = 0x10,
638	FD_SRB_DR0 = 0x20
639	};
640
641	enum {
642	#if MAX_FD == 4
643	FD_DOR_SELMASK = 0x03,
644	#else
645	FD_DOR_SELMASK = 0x01,
646	#endif
647	FD_DOR_nRESET = 0x04,
648	FD_DOR_DMAEN = 0x08,
649	FD_DOR_MOTEN0 = 0x10,
650	FD_DOR_MOTEN1 = 0x20,
651	FD_DOR_MOTEN2 = 0x40,
652	FD_DOR_MOTEN3 = 0x80
653	};
654
655	enum {
656	#if MAX_FD == 4
657	FD_TDR_BOOTSEL = 0x0c
658	#else
659	FD_TDR_BOOTSEL = 0x04
660	#endif
661	};
662
663	enum {
664	FD_DSR_DRATEMASK= 0x03,
665	FD_DSR_PWRDOWN = 0x40,
666	FD_DSR_SWRESET = 0x80
667	};
668
669	enum {
670	FD_MSR_DRV0BUSY = 0x01,
671	FD_MSR_DRV1BUSY = 0x02,
672	FD_MSR_DRV2BUSY = 0x04,
673	FD_MSR_DRV3BUSY = 0x08,
674	FD_MSR_CMDBUSY = 0x10,
675	FD_MSR_NONDMA = 0x20,
676	FD_MSR_DIO = 0x40,
677	FD_MSR_RQM = 0x80
678	};
679
680	enum {
681	FD_DIR_DSKCHG = 0x80
682	};
683
684	#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
685	#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
686	#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
687
688	#ifdef VBOX
689	/**
690	* Floppy controller state.
691	*
692	* @implements PDMILEDPORTS
693	*/
694	#endif
695	struct fdctrl_t {
696	#ifndef VBOX
697	fdctrl_t *fdctrl;
698	#endif
699	/* Controller's identification */
700	uint8_t version;
701	/* HW */
702	#ifndef VBOX
703	int irq;
704	int dma_chann;
705	#else
706	uint8_t irq_lvl;
707	uint8_t dma_chann;
708	#endif
709	uint32_t io_base;
710	/* Controller state */
711	#ifndef VBOX
712	QEMUTimer *result_timer;
713	#else
714	struct TMTIMER *result_timer;
715	#endif
716	uint8_t sra;
717	uint8_t srb;
718	uint8_t dor;
719	uint8_t tdr;
720	uint8_t dsr;
721	uint8_t msr;
722	uint8_t cur_drv;
723	uint8_t status0;
724	uint8_t status1;
725	uint8_t status2;
726	/* Command FIFO */
727	uint8_t fifo[FD_SECTOR_LEN];
728	uint32_t data_pos;
729	uint32_t data_len;
730	uint8_t data_state;
731	uint8_t data_dir;
732	uint8_t eot; /* last wanted sector */
733	/* States kept only to be returned back */
734	/* Timers state */
735	uint8_t timer0;
736	uint8_t timer1;
737	/* precompensation */
738	uint8_t precomp_trk;
739	uint8_t config;
740	uint8_t lock;
741	/* Power down config (also with status regB access mode */
742	uint8_t pwrd;
743	/* Floppy drives */
744	uint8_t num_floppies;
745	fdrive_t drives[MAX_FD];
746	uint8_t reset_sensei;
747	#ifdef VBOX
748	/** Pointer to device instance. */
749	PPDMDEVINS pDevIns;
750
751	/** Status LUN: The base interface. */
752	PDMIBASE IBaseStatus;
753	/** Status LUN: The Leds interface. */
754	PDMILEDPORTS ILeds;
755	/** Status LUN: The Partner of ILeds. */
756	PPDMILEDCONNECTORS pLedsConnector;
757	#endif
758	};
759
760	static uint32_t fdctrl_read (void *opaque, uint32_t reg)
761	{
762	fdctrl_t fdctrl = (fdctrl_t )opaque;
763	uint32_t retval;
764
765	switch (reg) {
766	case FD_REG_SRA:
767	retval = fdctrl_read_statusA(fdctrl);
768	break;
769	case FD_REG_SRB:
770	retval = fdctrl_read_statusB(fdctrl);
771	break;
772	case FD_REG_DOR:
773	retval = fdctrl_read_dor(fdctrl);
774	break;
775	case FD_REG_TDR:
776	retval = fdctrl_read_tape(fdctrl);
777	break;
778	case FD_REG_MSR:
779	retval = fdctrl_read_main_status(fdctrl);
780	break;
781	case FD_REG_FIFO:
782	retval = fdctrl_read_data(fdctrl);
783	break;
784	case FD_REG_DIR:
785	retval = fdctrl_read_dir(fdctrl);
786	break;
787	default:
788	retval = (uint32_t)(-1);
789	break;
790	}
791	FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
792
793	return retval;
794	}
795
796	static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
797	{
798	fdctrl_t fdctrl = (fdctrl_t )opaque;
799
800	FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
801
802	switch (reg) {
803	case FD_REG_DOR:
804	fdctrl_write_dor(fdctrl, value);
805	break;
806	case FD_REG_TDR:
807	fdctrl_write_tape(fdctrl, value);
808	break;
809	case FD_REG_DSR:
810	fdctrl_write_rate(fdctrl, value);
811	break;
812	case FD_REG_FIFO:
813	fdctrl_write_data(fdctrl, value);
814	break;
815	case FD_REG_CCR:
816	fdctrl_write_ccr(fdctrl, value);
817	break;
818	default:
819	break;
820	}
821	}
822
823	/* Change IRQ state */
824	static void fdctrl_reset_irq(fdctrl_t *fdctrl)
825	{
826	if (!(fdctrl->sra & FD_SRA_INTPEND))
827	return;
828	FLOPPY_DPRINTF("Reset interrupt\n");
829	#ifdef VBOX
830	PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 0);
831	#else
832	qemu_set_irq(fdctrl->irq, 0);
833	#endif
834	fdctrl->sra &= ~FD_SRA_INTPEND;
835	}
836
837	static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0)
838	{
839	if (!(fdctrl->sra & FD_SRA_INTPEND)) {
840	FLOPPY_DPRINTF("Raising interrupt...\n");
841	#ifdef VBOX
842	PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 1);
843	#else
844	qemu_set_irq(fdctrl->irq, 1);
845	#endif
846	fdctrl->sra \|= FD_SRA_INTPEND;
847	}
848	if (status0 & FD_SR0_SEEK) {
849	fdrive_t *cur_drv;
850
851	/* A seek clears the disk change line (if a disk is inserted). */
852	cur_drv = get_cur_drv(fdctrl);
853	if (cur_drv->max_track)
854	cur_drv->dsk_chg = false;
855	}
856
857	fdctrl->reset_sensei = 0;
858	fdctrl->status0 = status0;
859	FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
860	}
861
862	/* Reset controller */
863	static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq)
864	{
865	int i;
866
867	FLOPPY_DPRINTF("reset controller\n");
868	fdctrl_reset_irq(fdctrl);
869	/* Initialise controller */
870	fdctrl->sra = 0;
871	fdctrl->srb = 0xc0;
872	#ifdef VBOX
873	if (!fdctrl->drives[1].pDrvMedia)
874	#else
875	if (!fdctrl->drives[1].bs)
876	#endif
877	fdctrl->sra \|= FD_SRA_nDRV2;
878	fdctrl->cur_drv = 0;
879	fdctrl->dor = FD_DOR_nRESET;
880	fdctrl->dor \|= (fdctrl->dma_chann != 0xff) ? FD_DOR_DMAEN : 0;
881	fdctrl->msr = FD_MSR_RQM;
882	/* FIFO state */
883	fdctrl->data_pos = 0;
884	fdctrl->data_len = 0;
885	fdctrl->data_state = 0;
886	fdctrl->data_dir = FD_DIR_WRITE;
887	for (i = 0; i < MAX_FD; i++)
888	fd_recalibrate(&fdctrl->drives[i]);
889	fdctrl_reset_fifo(fdctrl);
890	if (do_irq) {
891	fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
892	fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
893	}
894	}
895
896	static inline fdrive_t drv0(fdctrl_t fdctrl)
897	{
898	return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
899	}
900
901	static inline fdrive_t drv1(fdctrl_t fdctrl)
902	{
903	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
904	return &fdctrl->drives[1];
905	else
906	return &fdctrl->drives[0];
907	}
908
909	#if MAX_FD == 4
910	static inline fdrive_t drv2(fdctrl_t fdctrl)
911	{
912	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
913	return &fdctrl->drives[2];
914	else
915	return &fdctrl->drives[1];
916	}
917
918	static inline fdrive_t drv3(fdctrl_t fdctrl)
919	{
920	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
921	return &fdctrl->drives[3];
922	else
923	return &fdctrl->drives[2];
924	}
925	#endif
926
927	static fdrive_t get_cur_drv(fdctrl_t fdctrl)
928	{
929	switch (fdctrl->cur_drv) {
930	case 0: return drv0(fdctrl);
931	case 1: return drv1(fdctrl);
932	#if MAX_FD == 4
933	case 2: return drv2(fdctrl);
934	case 3: return drv3(fdctrl);
935	#endif
936	default: return NULL;
937	}
938	}
939
940	/* Status A register : 0x00 (read-only) */
941	static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl)
942	{
943	uint32_t retval = fdctrl->sra;
944
945	FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
946
947	return retval;
948	}
949
950	/* Status B register : 0x01 (read-only) */
951	static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl)
952	{
953	uint32_t retval = fdctrl->srb;
954
955	FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
956
957	return retval;
958	}
959
960	/* Digital output register : 0x02 */
961	static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl)
962	{
963	uint32_t retval = fdctrl->dor;
964
965	/* Selected drive */
966	retval \|= fdctrl->cur_drv;
967	FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
968
969	return retval;
970	}
971
972	static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value)
973	{
974	FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
975
976	/* Motors */
977	if (value & FD_DOR_MOTEN0)
978	fdctrl->srb \|= FD_SRB_MTR0;
979	else
980	fdctrl->srb &= ~FD_SRB_MTR0;
981	if (value & FD_DOR_MOTEN1)
982	fdctrl->srb \|= FD_SRB_MTR1;
983	else
984	fdctrl->srb &= ~FD_SRB_MTR1;
985
986	/* Drive */
987	if (value & 1)
988	fdctrl->srb \|= FD_SRB_DR0;
989	else
990	fdctrl->srb &= ~FD_SRB_DR0;
991
992	/* Reset */
993	if (!(value & FD_DOR_nRESET)) {
994	if (fdctrl->dor & FD_DOR_nRESET) {
995	FLOPPY_DPRINTF("controller enter RESET state\n");
996	}
997	} else {
998	if (!(fdctrl->dor & FD_DOR_nRESET)) {
999	FLOPPY_DPRINTF("controller out of RESET state\n");
1000	fdctrl_reset(fdctrl, 1);
1001	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1002	}
1003	}
1004	/* Selected drive */
1005	fdctrl->cur_drv = value & FD_DOR_SELMASK;
1006
1007	fdctrl->dor = value;
1008	}
1009
1010	/* Tape drive register : 0x03 */
1011	static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl)
1012	{
1013	uint32_t retval = fdctrl->tdr;
1014
1015	FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
1016
1017	return retval;
1018	}
1019
1020	static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value)
1021	{
1022	/* Reset mode */
1023	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1024	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1025	return;
1026	}
1027	FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
1028	/* Disk boot selection indicator */
1029	fdctrl->tdr = value & FD_TDR_BOOTSEL;
1030	/* Tape indicators: never allow */
1031	}
1032
1033	/* Main status register : 0x04 (read) */
1034	static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl)
1035	{
1036	uint32_t retval = fdctrl->msr;
1037
1038	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1039	fdctrl->dor \|= FD_DOR_nRESET;
1040
1041	FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
1042
1043	return retval;
1044	}
1045
1046	/* Data select rate register : 0x04 (write) */
1047	static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value)
1048	{
1049	/* Reset mode */
1050	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1051	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1052	return;
1053	}
1054	FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
1055	/* Reset: autoclear */
1056	if (value & FD_DSR_SWRESET) {
1057	fdctrl->dor &= ~FD_DOR_nRESET;
1058	fdctrl_reset(fdctrl, 1);
1059	fdctrl->dor \|= FD_DOR_nRESET;
1060	}
1061	if (value & FD_DSR_PWRDOWN) {
1062	fdctrl_reset(fdctrl, 1);
1063	}
1064	fdctrl->dsr = value;
1065	}
1066
1067	/* Configuration control register : 0x07 (write) */
1068	static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value)
1069	{
1070	/* Reset mode */
1071	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1072	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1073	return;
1074	}
1075	FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
1076
1077	/* Only the rate selection bits used in AT mode, and we
1078	* store those in the DSR.
1079	*/
1080	fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) \| (value & FD_DSR_DRATEMASK);
1081	}
1082
1083	static int fdctrl_media_changed(fdrive_t *drv)
1084	{
1085	#ifdef VBOX
1086	return drv->dsk_chg;
1087	#else
1088	int ret;
1089
1090	if (!drv->bs)
1091	return 0;
1092	ret = bdrv_media_changed(drv->bs);
1093	if (ret) {
1094	fd_revalidate(drv);
1095	}
1096	return ret;
1097	#endif
1098	}
1099
1100	/* Digital input register : 0x07 (read-only) */
1101	static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl)
1102	{
1103	uint32_t retval = 0;
1104
1105	#ifdef VBOX
1106	/* The change line signal is reported by the currently selected
1107	* drive. If the corresponding motor on bit is not set, the drive
1108	* is not selected!
1109	*/
1110	if (fdctrl_media_changed(get_cur_drv(fdctrl))
1111	&& (fdctrl->dor & (0x10 << fdctrl->cur_drv)))
1112	#else
1113	if (fdctrl_media_changed(drv0(fdctrl))
1114	\|\| fdctrl_media_changed(drv1(fdctrl))
1115	#if MAX_FD == 4
1116	\|\| fdctrl_media_changed(drv2(fdctrl))
1117	\|\| fdctrl_media_changed(drv3(fdctrl))
1118	#endif
1119	)
1120	#endif
1121	retval \|= FD_DIR_DSKCHG;
1122	if (retval != 0)
1123	FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
1124
1125	return retval;
1126	}
1127
1128	/* FIFO state control */
1129	static void fdctrl_reset_fifo(fdctrl_t *fdctrl)
1130	{
1131	fdctrl->data_dir = FD_DIR_WRITE;
1132	fdctrl->data_pos = 0;
1133	fdctrl->msr &= ~(FD_MSR_CMDBUSY \| FD_MSR_DIO);
1134	}
1135
1136	/* Set FIFO status for the host to read */
1137	static void fdctrl_set_fifo(fdctrl_t *fdctrl, int fifo_len, int do_irq)
1138	{
1139	fdctrl->data_dir = FD_DIR_READ;
1140	fdctrl->data_len = fifo_len;
1141	fdctrl->data_pos = 0;
1142	fdctrl->msr \|= FD_MSR_CMDBUSY \| FD_MSR_RQM \| FD_MSR_DIO;
1143	if (do_irq)
1144	fdctrl_raise_irq(fdctrl, 0x00);
1145	}
1146
1147	/* Set an error: unimplemented/unknown command */
1148	static void fdctrl_unimplemented(fdctrl_t *fdctrl, int direction)
1149	{
1150	RT_NOREF(direction);
1151	FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
1152	fdctrl->fifo[0] = FD_SR0_INVCMD;
1153	fdctrl_set_fifo(fdctrl, 1, 0);
1154	}
1155
1156	/* Seek to next sector */
1157	static int fdctrl_seek_to_next_sect(fdctrl_t fdctrl, fdrive_t cur_drv)
1158	{
1159	FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
1160	cur_drv->head, cur_drv->track, cur_drv->sect,
1161	fd_sector(cur_drv));
1162	/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1163	error in fact */
1164	if (cur_drv->sect >= cur_drv->last_sect \|\|
1165	cur_drv->sect == fdctrl->eot) {
1166	cur_drv->sect = 1;
1167	if (FD_MULTI_TRACK(fdctrl->data_state)) {
1168	if (cur_drv->head == 0 &&
1169	(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1170	cur_drv->head = 1;
1171	} else {
1172	cur_drv->head = 0;
1173	cur_drv->ltrk++;
1174	if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1175	return 0;
1176	}
1177	} else {
1178	cur_drv->ltrk++;
1179	return 0;
1180	}
1181	FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1182	cur_drv->head, cur_drv->track,
1183	cur_drv->sect, fd_sector(cur_drv));
1184	} else {
1185	cur_drv->sect++;
1186	}
1187	return 1;
1188	}
1189
1190	/* Callback for transfer end (stop or abort) */
1191	static void fdctrl_stop_transfer(fdctrl_t *fdctrl, uint8_t status0,
1192	uint8_t status1, uint8_t status2)
1193	{
1194	fdrive_t *cur_drv;
1195
1196	cur_drv = get_cur_drv(fdctrl);
1197	FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
1198	status0, status1, status2,
1199	status0 \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl));
1200	fdctrl->fifo[0] = status0 \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl);
1201	fdctrl->fifo[1] = status1;
1202	fdctrl->fifo[2] = status2;
1203	fdctrl->fifo[3] = cur_drv->ltrk;
1204	fdctrl->fifo[4] = cur_drv->head;
1205	fdctrl->fifo[5] = cur_drv->sect;
1206	fdctrl->fifo[6] = FD_SECTOR_SC;
1207	FLOPPY_DPRINTF("ST0:%02x ST1:%02x ST2:%02x C:%02x H:%02x R:%02x N:%02x\n",
1208	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2], fdctrl->fifo[3],
1209	fdctrl->fifo[4], fdctrl->fifo[5], fdctrl->fifo[6]);
1210
1211	fdctrl->data_dir = FD_DIR_READ;
1212	if (!(fdctrl->msr & FD_MSR_NONDMA)) {
1213	#ifdef VBOX
1214	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 0);
1215	#else
1216	DMA_release_DREQ(fdctrl->dma_chann);
1217	#endif
1218	}
1219	fdctrl->msr \|= FD_MSR_RQM \| FD_MSR_DIO;
1220	fdctrl->msr &= ~FD_MSR_NONDMA;
1221	fdctrl_set_fifo(fdctrl, 7, 1);
1222	}
1223
1224	/* Prepare a data transfer (either DMA or FIFO) */
1225	static void fdctrl_start_transfer(fdctrl_t *fdctrl, int direction)
1226	{
1227	fdrive_t *cur_drv;
1228	uint8_t kh, kt, ks;
1229	int did_seek = 0;
1230
1231	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1232	cur_drv = get_cur_drv(fdctrl);
1233	kt = fdctrl->fifo[2];
1234	kh = fdctrl->fifo[3];
1235	ks = fdctrl->fifo[4];
1236	FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
1237	GET_CUR_DRV(fdctrl), kh, kt, ks,
1238	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1239	FLOPPY_DPRINTF("CMD:%02x SEL:%02x C:%02x H:%02x R:%02x N:%02x EOT:%02x GPL:%02x DTL:%02x\n",
1240	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
1241	fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5],
1242	fdctrl->fifo[6], fdctrl->fifo[7], fdctrl->fifo[8]);
1243	switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1244	case 2:
1245	/* sect too big */
1246	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1247	fdctrl->fifo[3] = kt;
1248	fdctrl->fifo[4] = kh;
1249	fdctrl->fifo[5] = ks;
1250	return;
1251	case 3:
1252	/* track too big */
1253	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1254	fdctrl->fifo[3] = kt;
1255	fdctrl->fifo[4] = kh;
1256	fdctrl->fifo[5] = ks;
1257	return;
1258	case 4:
1259	/* No seek enabled */
1260	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1261	fdctrl->fifo[3] = kt;
1262	fdctrl->fifo[4] = kh;
1263	fdctrl->fifo[5] = ks;
1264	return;
1265	case 5:
1266	/* No disk in drive */
1267	/// @todo This is wrong! Command should not complete.
1268	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| 0x08, /FD_SR1_MA \|/ FD_SR1_ND, 0x00);
1269	fdctrl->fifo[3] = kt;
1270	fdctrl->fifo[4] = kh;
1271	fdctrl->fifo[5] = ks;
1272	return;
1273	case 1:
1274	did_seek = 1;
1275	break;
1276	default:
1277	break;
1278	}
1279	/* Check the data rate. If the programmed data rate does not match
1280	* the currently inserted medium, the operation has to fail.
1281	*/
1282	#ifdef VBOX
1283	if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
1284	FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
1285	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
1286	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
1287	fdctrl->fifo[3] = kt;
1288	fdctrl->fifo[4] = kh;
1289	fdctrl->fifo[5] = ks;
1290	return;
1291	}
1292	#endif
1293	/* Set the FIFO state */
1294	fdctrl->data_dir = direction;
1295	fdctrl->data_pos = 0;
1296	fdctrl->msr \|= FD_MSR_CMDBUSY;
1297	if (fdctrl->fifo[0] & 0x80)
1298	fdctrl->data_state \|= FD_STATE_MULTI;
1299	else
1300	fdctrl->data_state &= ~FD_STATE_MULTI;
1301	if (did_seek)
1302	fdctrl->data_state \|= FD_STATE_SEEK;
1303	else
1304	fdctrl->data_state &= ~FD_STATE_SEEK;
1305	if (fdctrl->fifo[5] == 00) {
1306	fdctrl->data_len = fdctrl->fifo[8];
1307	} else {
1308	int tmp;
1309	fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1310	tmp = (fdctrl->fifo[6] - ks + 1);
1311	if (fdctrl->fifo[0] & 0x80)
1312	tmp += fdctrl->fifo[6];
1313	fdctrl->data_len *= tmp;
1314	}
1315	fdctrl->eot = fdctrl->fifo[6];
1316	if (fdctrl->dor & FD_DOR_DMAEN) {
1317	int dma_mode;
1318	/* DMA transfer are enabled. Check if DMA channel is well programmed */
1319	#ifndef VBOX
1320	dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1321	#else
1322	dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
1323	#endif
1324	dma_mode = (dma_mode >> 2) & 3;
1325	FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1326	dma_mode, direction,
1327	(128 << fdctrl->fifo[5]) *
1328	(cur_drv->last_sect - ks + 1), fdctrl->data_len);
1329	if (((direction == FD_DIR_SCANE \|\| direction == FD_DIR_SCANL \|\|
1330	direction == FD_DIR_SCANH) && dma_mode == 0) \|\|
1331	(direction == FD_DIR_WRITE && dma_mode == 2) \|\|
1332	(direction == FD_DIR_READ && (dma_mode == 1 \|\| dma_mode == 0))) {
1333	/* No access is allowed until DMA transfer has completed */
1334	fdctrl->msr &= ~FD_MSR_RQM;
1335	/* Now, we just have to wait for the DMA controller to
1336	* recall us...
1337	*/
1338	#ifndef VBOX
1339	DMA_hold_DREQ(fdctrl->dma_chann);
1340	DMA_schedule(fdctrl->dma_chann);
1341	#else
1342	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
1343	PDMDevHlpDMASchedule (fdctrl->pDevIns);
1344	#endif
1345	return;
1346	} else {
1347	FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1348	}
1349	}
1350	FLOPPY_DPRINTF("start non-DMA transfer\n");
1351	fdctrl->msr \|= FD_MSR_NONDMA;
1352	if (direction != FD_DIR_WRITE)
1353	fdctrl->msr \|= FD_MSR_DIO;
1354	/* IO based transfer: calculate len */
1355	fdctrl_raise_irq(fdctrl, 0x00);
1356
1357	return;
1358	}
1359
1360	/* Prepare a format data transfer (either DMA or FIFO) */
1361	static void fdctrl_start_format(fdctrl_t *fdctrl)
1362	{
1363	fdrive_t *cur_drv;
1364	uint8_t ns, dp, kh, kt, ks;
1365
1366	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1367	cur_drv = get_cur_drv(fdctrl);
1368	kt = cur_drv->track;
1369	kh = (fdctrl->fifo[1] & 0x04) >> 2;
1370	ns = fdctrl->fifo[3];
1371	dp = fdctrl->fifo[5];
1372	ks = 1;
1373	FLOPPY_DPRINTF("Start format at %d %d %02x, %d sect, pat %02x (%d)\n",
1374	GET_CUR_DRV(fdctrl), kh, kt, ns, dp,
1375	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1376	switch (fd_seek(cur_drv, kh, kt, ks, false)) {
1377	case 2:
1378	/* sect too big */
1379	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1380	fdctrl->fifo[3] = kt;
1381	fdctrl->fifo[4] = kh;
1382	fdctrl->fifo[5] = ks;
1383	return;
1384	case 3:
1385	/* track too big */
1386	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1387	fdctrl->fifo[3] = kt;
1388	fdctrl->fifo[4] = kh;
1389	fdctrl->fifo[5] = ks;
1390	return;
1391	case 4:
1392	/* No seek enabled */
1393	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1394	fdctrl->fifo[3] = kt;
1395	fdctrl->fifo[4] = kh;
1396	fdctrl->fifo[5] = ks;
1397	return;
1398	case 5:
1399	/* No disk in drive */
1400	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
1401	fdctrl->fifo[3] = kt;
1402	fdctrl->fifo[4] = kh;
1403	fdctrl->fifo[5] = ks;
1404	return;
1405	case 1:
1406	break;
1407	default:
1408	break;
1409	}
1410	/* It's not clear what should happen if the data rate does not match. */
1411	#if 0
1412	/* Check the data rate. If the programmed data rate does not match
1413	* the currently inserted medium, the operation has to fail.
1414	*/
1415	if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
1416	FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
1417	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
1418	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
1419	fdctrl->fifo[3] = kt;
1420	fdctrl->fifo[4] = kh;
1421	fdctrl->fifo[5] = ks;
1422	return;
1423	}
1424	#endif
1425	/* Set the FIFO state */
1426	fdctrl->data_dir = FD_DIR_FORMAT;
1427	fdctrl->data_pos = 0;
1428	fdctrl->msr \|= FD_MSR_CMDBUSY;
1429	fdctrl->data_state &= ~(FD_STATE_MULTI \| FD_STATE_SEEK);
1430	fdctrl->data_len = ns * 4;
1431	fdctrl->eot = ns;
1432	if (fdctrl->dor & FD_DOR_DMAEN) {
1433	int dma_mode;
1434	/* DMA transfer are enabled. Check if DMA channel is well programmed */
1435	#ifndef VBOX
1436	dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1437	#else
1438	dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
1439	#endif
1440	dma_mode = (dma_mode >> 2) & 3;
1441	FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1442	dma_mode, fdctrl->data_dir,
1443	(128 << fdctrl->fifo[2]) *
1444	(cur_drv->last_sect + 1), fdctrl->data_len);
1445	if (fdctrl->data_dir == FD_DIR_FORMAT && dma_mode == 2) {
1446	/* No access is allowed until DMA transfer has completed */
1447	fdctrl->msr &= ~FD_MSR_RQM;
1448	/* Now, we just have to wait for the DMA controller to
1449	* recall us...
1450	*/
1451	#ifndef VBOX
1452	DMA_hold_DREQ(fdctrl->dma_chann);
1453	DMA_schedule(fdctrl->dma_chann);
1454	#else
1455	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
1456	PDMDevHlpDMASchedule (fdctrl->pDevIns);
1457	#endif
1458	return;
1459	} else {
1460	FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, fdctrl->data_dir);
1461	}
1462	}
1463	FLOPPY_DPRINTF("start non-DMA format\n");
1464	fdctrl->msr \|= FD_MSR_NONDMA;
1465	/* IO based transfer: calculate len */
1466	fdctrl_raise_irq(fdctrl, 0x00);
1467
1468	return;
1469	}
1470
1471	/* Prepare a transfer of deleted data */
1472	static void fdctrl_start_transfer_del(fdctrl_t *fdctrl, int direction)
1473	{
1474	RT_NOREF(direction);
1475	FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
1476
1477	/* We don't handle deleted data,
1478	* so we don't return ANYTHING
1479	*/
1480	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1481	}
1482
1483	#ifdef VBOX
1484	/* Block driver read/write wrappers. */
1485
1486	static int blk_write(fdrive_t drv, int64_t sector_num, const uint8_t buf, int nb_sectors)
1487	{
1488	int rc;
1489
1490	drv->Led.Asserted.s.fWriting = drv->Led.Actual.s.fWriting = 1;
1491
1492	rc = drv->pDrvMedia->pfnWrite(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
1493	buf, nb_sectors * FD_SECTOR_LEN);
1494
1495	drv->Led.Actual.s.fWriting = 0;
1496	if (RT_FAILURE(rc))
1497	AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
1498
1499	return rc;
1500	}
1501
1502	static int blk_read(fdrive_t drv, int64_t sector_num, uint8_t buf, int nb_sectors)
1503	{
1504	int rc;
1505
1506	drv->Led.Asserted.s.fReading = drv->Led.Actual.s.fReading = 1;
1507
1508	rc = drv->pDrvMedia->pfnRead(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
1509	buf, nb_sectors * FD_SECTOR_LEN);
1510
1511	drv->Led.Actual.s.fReading = 0;
1512
1513	if (RT_FAILURE(rc))
1514	AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
1515
1516	return rc;
1517	}
1518
1519	#endif
1520
1521	/* handlers for DMA transfers */
1522	#ifdef VBOX
1523	static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
1524	void *opaque,
1525	unsigned nchan,
1526	uint32_t dma_pos,
1527	uint32_t dma_len)
1528	#else
1529	static int fdctrl_transfer_handler (void *opaque, int nchan,
1530	int dma_pos, int dma_len)
1531	#endif
1532	{
1533	RT_NOREF(pDevIns, dma_pos);
1534	fdctrl_t *fdctrl;
1535	fdrive_t *cur_drv;
1536	#ifdef VBOX
1537	int rc;
1538	uint32_t len = 0;
1539	uint32_t start_pos, rel_pos;
1540	#else
1541	int len, start_pos, rel_pos;
1542	#endif
1543	uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1544
1545	fdctrl = (fdctrl_t *)opaque;
1546	if (fdctrl->msr & FD_MSR_RQM) {
1547	FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1548	return 0;
1549	}
1550	cur_drv = get_cur_drv(fdctrl);
1551	if (fdctrl->data_dir == FD_DIR_SCANE \|\| fdctrl->data_dir == FD_DIR_SCANL \|\|
1552	fdctrl->data_dir == FD_DIR_SCANH)
1553	status2 = FD_SR2_SNS;
1554	if (dma_len > fdctrl->data_len)
1555	dma_len = fdctrl->data_len;
1556	#ifndef VBOX
1557	if (cur_drv->bs == NULL)
1558	#else /* !VBOX */
1559	if (cur_drv->pDrvMedia == NULL)
1560	#endif
1561	{
1562	if (fdctrl->data_dir == FD_DIR_WRITE)
1563	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1564	else
1565	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1566	Assert(len == 0);
1567	goto transfer_error;
1568	}
1569
1570	#ifdef VBOX
1571	if (cur_drv->ro)
1572	{
1573	if (fdctrl->data_dir == FD_DIR_WRITE \|\| fdctrl->data_dir == FD_DIR_FORMAT)
1574	{
1575	/* Handle readonly medium early, no need to do DMA, touch the
1576	* LED or attempt any writes. A real floppy doesn't attempt
1577	* to write to readonly media either. */
1578	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, FD_SR1_NW,
1579	0x00);
1580	Assert(len == 0);
1581	goto transfer_error;
1582	}
1583	}
1584	#endif
1585
1586
1587	rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1588	for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1589	len = dma_len - fdctrl->data_pos;
1590	if (len + rel_pos > FD_SECTOR_LEN)
1591	len = FD_SECTOR_LEN - rel_pos;
1592	FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1593	"(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1594	fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
1595	cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1596	fd_sector(cur_drv) * FD_SECTOR_LEN);
1597	if (fdctrl->data_dir != FD_DIR_FORMAT &&
1598	(fdctrl->data_dir != FD_DIR_WRITE \|\|
1599	len < FD_SECTOR_LEN \|\| rel_pos != 0)) {
1600	/* READ & SCAN commands and realign to a sector for WRITE */
1601	#ifdef VBOX
1602	rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1603	if (RT_FAILURE(rc))
1604	#else
1605	if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1606	fdctrl->fifo, 1) < 0)
1607	#endif
1608	{
1609	FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1610	fd_sector(cur_drv));
1611	/* Sure, image size is too small... */
1612	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1613	}
1614	}
1615	switch (fdctrl->data_dir) {
1616	case FD_DIR_READ:
1617	/* READ commands */
1618	#ifdef VBOX
1619	{
1620	uint32_t read;
1621	int rc2 = PDMDevHlpDMAWriteMemory(fdctrl->pDevIns, nchan,
1622	fdctrl->fifo + rel_pos,
1623	fdctrl->data_pos,
1624	len, &read);
1625	AssertMsgRC (rc2, ("DMAWriteMemory -> %Rrc\n", rc2));
1626	}
1627	#else
1628	DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1629	fdctrl->data_pos, len);
1630	#endif
1631	/* cpu_physical_memory_write(addr + fdctrl->data_pos, */
1632	/* fdctrl->fifo + rel_pos, len); */
1633	break;
1634	case FD_DIR_WRITE:
1635	/* WRITE commands */
1636	#ifdef VBOX
1637	{
1638	uint32_t written;
1639	int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
1640	fdctrl->fifo + rel_pos,
1641	fdctrl->data_pos,
1642	len, &written);
1643	AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
1644	}
1645
1646	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1647	if (RT_FAILURE(rc))
1648	#else
1649	DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1650	fdctrl->data_pos, len);
1651	if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1652	fdctrl->fifo, 1) < 0)
1653	#endif
1654	{
1655	FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
1656	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1657	goto transfer_error;
1658	}
1659	break;
1660	#ifdef VBOX
1661	case FD_DIR_FORMAT:
1662	/* FORMAT command */
1663	{
1664	uint8_t eot = fdctrl->fifo[3];
1665	uint8_t filler = fdctrl->fifo[5];
1666	uint32_t written;
1667	int sct;
1668	int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
1669	fdctrl->fifo + rel_pos,
1670	fdctrl->data_pos,
1671	len, &written);
1672	AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
1673
1674	/* Fill the entire track with desired data pattern. */
1675	FLOPPY_DPRINTF("formatting track: %d sectors, pattern %02x\n",
1676	eot, filler);
1677	memset(fdctrl->fifo, filler, FD_SECTOR_LEN);
1678	for (sct = 0; sct < eot; ++sct)
1679	{
1680	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1681	if (RT_FAILURE(rc))
1682	{
1683	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1684	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1685	goto transfer_error;
1686	}
1687	fdctrl_seek_to_next_sect(fdctrl, cur_drv);
1688	}
1689	}
1690	break;
1691	#endif
1692	default:
1693	/* SCAN commands */
1694	{
1695	uint8_t tmpbuf[FD_SECTOR_LEN];
1696	int ret;
1697	#ifdef VBOX
1698	uint32_t read;
1699	int rc2 = PDMDevHlpDMAReadMemory (fdctrl->pDevIns, nchan, tmpbuf,
1700	fdctrl->data_pos, len, &read);
1701	AssertMsg(RT_SUCCESS(rc2), ("DMAReadMemory -> %Rrc2\n", rc2)); NOREF(rc2);
1702	#else
1703	DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1704	#endif
1705	ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1706	if (ret == 0) {
1707	status2 = FD_SR2_SEH;
1708	goto end_transfer;
1709	}
1710	if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) \|\|
1711	(ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1712	status2 = 0x00;
1713	goto end_transfer;
1714	}
1715	}
1716	break;
1717	}
1718	fdctrl->data_pos += len;
1719	rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1720	if (rel_pos == 0) {
1721	/* Seek to next sector */
1722	if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
1723	break;
1724	}
1725	}
1726	end_transfer:
1727	len = fdctrl->data_pos - start_pos;
1728	FLOPPY_DPRINTF("end transfer %d %d %d\n",
1729	fdctrl->data_pos, len, fdctrl->data_len);
1730	if (fdctrl->data_dir == FD_DIR_SCANE \|\|
1731	fdctrl->data_dir == FD_DIR_SCANL \|\|
1732	fdctrl->data_dir == FD_DIR_SCANH)
1733	status2 = FD_SR2_SEH;
1734	if (FD_DID_SEEK(fdctrl->data_state))
1735	status0 \|= FD_SR0_SEEK;
1736	fdctrl->data_len -= len;
1737	fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1738	transfer_error:
1739
1740	return len;
1741	}
1742
1743	/* Data register : 0x05 */
1744	static uint32_t fdctrl_read_data(fdctrl_t *fdctrl)
1745	{
1746	fdrive_t *cur_drv;
1747	uint32_t retval = 0;
1748	unsigned pos;
1749	#ifdef VBOX
1750	int rc;
1751	#endif
1752
1753	cur_drv = get_cur_drv(fdctrl);
1754	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1755	if (!(fdctrl->msr & FD_MSR_RQM) \|\| !(fdctrl->msr & FD_MSR_DIO)) {
1756	FLOPPY_ERROR("controller not ready for reading\n");
1757	return 0;
1758	}
1759	pos = fdctrl->data_pos % FD_SECTOR_LEN;
1760	if (fdctrl->msr & FD_MSR_NONDMA) {
1761	if (pos == 0) {
1762	if (fdctrl->data_pos != 0)
1763	if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
1764	FLOPPY_DPRINTF("error seeking to next sector %d\n",
1765	fd_sector(cur_drv));
1766	return 0;
1767	}
1768	#ifdef VBOX
1769	rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1770	if (RT_FAILURE(rc))
1771	#else
1772	if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0)
1773	#endif
1774	{
1775	FLOPPY_DPRINTF("error getting sector %d\n",
1776	fd_sector(cur_drv));
1777	/* Sure, image size is too small... */
1778	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1779	}
1780	}
1781	}
1782	retval = fdctrl->fifo[pos];
1783	if (++fdctrl->data_pos == fdctrl->data_len) {
1784	fdctrl->data_pos = 0;
1785	/* Switch from transfer mode to status mode
1786	* then from status mode to command mode
1787	*/
1788	if (fdctrl->msr & FD_MSR_NONDMA) {
1789	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1790	} else {
1791	fdctrl_reset_fifo(fdctrl);
1792	fdctrl_reset_irq(fdctrl);
1793	}
1794	}
1795	FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1796
1797	return retval;
1798	}
1799
1800	static void fdctrl_format_sector(fdctrl_t *fdctrl)
1801	{
1802	fdrive_t *cur_drv;
1803	uint8_t kh, kt, ks;
1804	#ifdef VBOX
1805	int ok = 0, rc;
1806	#endif
1807
1808	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1809	cur_drv = get_cur_drv(fdctrl);
1810	kt = fdctrl->fifo[6];
1811	kh = fdctrl->fifo[7];
1812	ks = fdctrl->fifo[8];
1813	FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1814	GET_CUR_DRV(fdctrl), kh, kt, ks,
1815	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1816	switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1817	case 2:
1818	/* sect too big */
1819	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1820	fdctrl->fifo[3] = kt;
1821	fdctrl->fifo[4] = kh;
1822	fdctrl->fifo[5] = ks;
1823	return;
1824	case 3:
1825	/* track too big */
1826	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1827	fdctrl->fifo[3] = kt;
1828	fdctrl->fifo[4] = kh;
1829	fdctrl->fifo[5] = ks;
1830	return;
1831	case 4:
1832	/* No seek enabled */
1833	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1834	fdctrl->fifo[3] = kt;
1835	fdctrl->fifo[4] = kh;
1836	fdctrl->fifo[5] = ks;
1837	return;
1838	case 5:
1839	/* No disk in drive */
1840	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
1841	fdctrl->fifo[3] = kt;
1842	fdctrl->fifo[4] = kh;
1843	fdctrl->fifo[5] = ks;
1844	return;
1845	case 1:
1846	fdctrl->data_state \|= FD_STATE_SEEK;
1847	break;
1848	default:
1849	break;
1850	}
1851	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1852	#ifdef VBOX
1853	if (cur_drv->pDrvMedia) {
1854	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1855	if (RT_FAILURE (rc)) {
1856	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1857	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1858	} else {
1859	ok = 1;
1860	}
1861	}
1862	if (ok) {
1863	#else
1864	if (cur_drv->bs == NULL \|\|
1865	bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1866	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1867	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1868	} else {
1869	#endif
1870	if (cur_drv->sect == cur_drv->last_sect) {
1871	fdctrl->data_state &= ~FD_STATE_FORMAT;
1872	/* Last sector done */
1873	if (FD_DID_SEEK(fdctrl->data_state))
1874	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1875	else
1876	fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1877	} else {
1878	/* More to do */
1879	fdctrl->data_pos = 0;
1880	fdctrl->data_len = 4;
1881	}
1882	}
1883	}
1884
1885	static void fdctrl_handle_lock(fdctrl_t *fdctrl, int direction)
1886	{
1887	RT_NOREF(direction);
1888	fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
1889	fdctrl->fifo[0] = fdctrl->lock << 4;
1890	fdctrl_set_fifo(fdctrl, 1, 0);
1891	}
1892
1893	static void fdctrl_handle_dumpreg(fdctrl_t *fdctrl, int direction)
1894	{
1895	RT_NOREF(direction);
1896	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1897
1898	/* Drives position */
1899	fdctrl->fifo[0] = drv0(fdctrl)->track;
1900	fdctrl->fifo[1] = drv1(fdctrl)->track;
1901	#if MAX_FD == 4
1902	fdctrl->fifo[2] = drv2(fdctrl)->track;
1903	fdctrl->fifo[3] = drv3(fdctrl)->track;
1904	#else
1905	fdctrl->fifo[2] = 0;
1906	fdctrl->fifo[3] = 0;
1907	#endif
1908	/* timers */
1909	fdctrl->fifo[4] = fdctrl->timer0;
1910	fdctrl->fifo[5] = (fdctrl->timer1 << 1) \| (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
1911	fdctrl->fifo[6] = cur_drv->last_sect;
1912	fdctrl->fifo[7] = (fdctrl->lock << 7) \|
1913	(cur_drv->perpendicular << 2);
1914	fdctrl->fifo[8] = fdctrl->config;
1915	fdctrl->fifo[9] = fdctrl->precomp_trk;
1916	fdctrl_set_fifo(fdctrl, 10, 0);
1917	}
1918
1919	static void fdctrl_handle_version(fdctrl_t *fdctrl, int direction)
1920	{
1921	RT_NOREF(direction);
1922	/* Controller's version */
1923	fdctrl->fifo[0] = fdctrl->version;
1924	fdctrl_set_fifo(fdctrl, 1, 0);
1925	}
1926
1927	static void fdctrl_handle_partid(fdctrl_t *fdctrl, int direction)
1928	{
1929	RT_NOREF(direction);
1930	fdctrl->fifo[0] = 0x01; /* Stepping 1 */
1931	fdctrl_set_fifo(fdctrl, 1, 0);
1932	}
1933
1934	static void fdctrl_handle_restore(fdctrl_t *fdctrl, int direction)
1935	{
1936	RT_NOREF(direction);
1937	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1938
1939	/* Drives position */
1940	drv0(fdctrl)->track = fdctrl->fifo[3];
1941	drv1(fdctrl)->track = fdctrl->fifo[4];
1942	#if MAX_FD == 4
1943	drv2(fdctrl)->track = fdctrl->fifo[5];
1944	drv3(fdctrl)->track = fdctrl->fifo[6];
1945	#endif
1946	/* timers */
1947	fdctrl->timer0 = fdctrl->fifo[7];
1948	fdctrl->timer1 = fdctrl->fifo[8];
1949	cur_drv->last_sect = fdctrl->fifo[9];
1950	fdctrl->lock = fdctrl->fifo[10] >> 7;
1951	cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1952	fdctrl->config = fdctrl->fifo[11];
1953	fdctrl->precomp_trk = fdctrl->fifo[12];
1954	fdctrl->pwrd = fdctrl->fifo[13];
1955	fdctrl_reset_fifo(fdctrl);
1956	}
1957
1958	static void fdctrl_handle_save(fdctrl_t *fdctrl, int direction)
1959	{
1960	RT_NOREF(direction);
1961	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1962
1963	fdctrl->fifo[0] = 0;
1964	fdctrl->fifo[1] = 0;
1965	/* Drives position */
1966	fdctrl->fifo[2] = drv0(fdctrl)->track;
1967	fdctrl->fifo[3] = drv1(fdctrl)->track;
1968	#if MAX_FD == 4
1969	fdctrl->fifo[4] = drv2(fdctrl)->track;
1970	fdctrl->fifo[5] = drv3(fdctrl)->track;
1971	#else
1972	fdctrl->fifo[4] = 0;
1973	fdctrl->fifo[5] = 0;
1974	#endif
1975	/* timers */
1976	fdctrl->fifo[6] = fdctrl->timer0;
1977	fdctrl->fifo[7] = fdctrl->timer1;
1978	fdctrl->fifo[8] = cur_drv->last_sect;
1979	fdctrl->fifo[9] = (fdctrl->lock << 7) \|
1980	(cur_drv->perpendicular << 2);
1981	fdctrl->fifo[10] = fdctrl->config;
1982	fdctrl->fifo[11] = fdctrl->precomp_trk;
1983	fdctrl->fifo[12] = fdctrl->pwrd;
1984	fdctrl->fifo[13] = 0;
1985	fdctrl->fifo[14] = 0;
1986	fdctrl_set_fifo(fdctrl, 15, 0);
1987	}
1988
1989	static void fdctrl_handle_readid(fdctrl_t *fdctrl, int direction)
1990	{
1991	RT_NOREF(direction);
1992	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1993
1994	FLOPPY_DPRINTF("CMD:%02x SEL:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
1995
1996	fdctrl->msr &= ~FD_MSR_RQM;
1997	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1998	#ifdef VBOX
1999	TMTimerSetMillies(fdctrl->result_timer, 1000 / 50);
2000	#else
2001	qemu_mod_timer(fdctrl->result_timer,
2002	qemu_get_clock(vm_clock) + (get_ticks_per_sec() / 50));
2003	#endif
2004	}
2005
2006	static void fdctrl_handle_format_track(fdctrl_t *fdctrl, int direction)
2007	{
2008	RT_NOREF(direction);
2009	fdrive_t *cur_drv;
2010	uint8_t ns, dp;
2011
2012	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2013	cur_drv = get_cur_drv(fdctrl);
2014	fdctrl->data_state &= ~(FD_STATE_MULTI \| FD_STATE_SEEK);
2015	ns = fdctrl->fifo[3];
2016	dp = fdctrl->fifo[5];
2017
2018	FLOPPY_DPRINTF("Format track %d at %d, %d sectors, filler %02x\n",
2019	cur_drv->track, GET_CUR_DRV(fdctrl), ns, dp);
2020	FLOPPY_DPRINTF("CMD:%02x SEL:%02x N:%02x SC:%02x GPL:%02x D:%02x\n",
2021	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
2022	fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5]);
2023
2024	/* Since we cannot actually format anything, we have to make sure that
2025	* whatever new format the guest is trying to establish matches the
2026	* existing format of the medium.
2027	*/
2028	if (cur_drv->last_sect != ns \|\| fdctrl->fifo[2] != 2)
2029	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_NW, 0);
2030	else
2031	{
2032	cur_drv->bps = fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
2033	cur_drv->last_sect = ns;
2034
2035	fdctrl_start_format(fdctrl);
2036	}
2037	}
2038
2039	static void fdctrl_handle_specify(fdctrl_t *fdctrl, int direction)
2040	{
2041	RT_NOREF(direction);
2042	fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
2043	fdctrl->timer1 = fdctrl->fifo[2] >> 1;
2044	if (fdctrl->fifo[2] & 1)
2045	fdctrl->dor &= ~FD_DOR_DMAEN;
2046	else
2047	fdctrl->dor \|= FD_DOR_DMAEN;
2048	/* No result back */
2049	fdctrl_reset_fifo(fdctrl);
2050	}
2051
2052	static void fdctrl_handle_sense_drive_status(fdctrl_t *fdctrl, int direction)
2053	{
2054	RT_NOREF(direction);
2055	fdrive_t *cur_drv;
2056
2057	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2058	cur_drv = get_cur_drv(fdctrl);
2059	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2060	/* 1 Byte status back */
2061	fdctrl->fifo[0] = (cur_drv->ro << 6) \|
2062	(cur_drv->track == 0 ? 0x10 : 0x00) \|
2063	(cur_drv->head << 2) \|
2064	GET_CUR_DRV(fdctrl) \|
2065	0x28;
2066	fdctrl_set_fifo(fdctrl, 1, 0);
2067	}
2068
2069	static void fdctrl_handle_recalibrate(fdctrl_t *fdctrl, int direction)
2070	{
2071	RT_NOREF(direction);
2072	fdrive_t *cur_drv;
2073	uint8_t st0;
2074
2075	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2076	cur_drv = get_cur_drv(fdctrl);
2077	fd_recalibrate(cur_drv);
2078	fdctrl_reset_fifo(fdctrl);
2079	st0 = FD_SR0_SEEK \| GET_CUR_DRV(fdctrl);
2080	/* No drive means no TRK0 signal. */
2081	if (cur_drv->drive == FDRIVE_DRV_NONE)
2082	st0 \|= FD_SR0_ABNTERM \| FD_SR0_EQPMT;
2083	/* Raise Interrupt */
2084	fdctrl_raise_irq(fdctrl, st0);
2085	}
2086
2087	static void fdctrl_handle_sense_interrupt_status(fdctrl_t *fdctrl, int direction)
2088	{
2089	RT_NOREF(direction);
2090	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2091
2092	FLOPPY_DPRINTF("CMD:%02x\n", fdctrl->fifo[0]);
2093	if(fdctrl->reset_sensei > 0) {
2094	fdctrl->fifo[0] =
2095	FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
2096	fdctrl->reset_sensei--;
2097	} else {
2098	/* XXX: status0 handling is broken for read/write
2099	commands, so we do this hack. It should be suppressed
2100	ASAP */
2101	fdctrl->fifo[0] =
2102	FD_SR0_SEEK \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl);
2103	/* Hack to preserve SR0 on equipment check failures (no drive). */
2104	if (fdctrl->status0 & FD_SR0_EQPMT)
2105	fdctrl->fifo[0] = fdctrl->status0;
2106	}
2107
2108	fdctrl->fifo[1] = cur_drv->track;
2109	fdctrl_set_fifo(fdctrl, 2, 0);
2110	FLOPPY_DPRINTF("ST0:%02x PCN:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
2111	fdctrl->status0 = FD_SR0_RDYCHG;
2112	}
2113
2114	static void fdctrl_handle_seek(fdctrl_t *fdctrl, int direction)
2115	{
2116	RT_NOREF(direction);
2117	fdrive_t *cur_drv;
2118
2119	FLOPPY_DPRINTF("CMD:%02x SEL:%02x NCN:%02x\n", fdctrl->fifo[0],
2120	fdctrl->fifo[1], fdctrl->fifo[2]);
2121
2122	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2123	cur_drv = get_cur_drv(fdctrl);
2124	fdctrl_reset_fifo(fdctrl);
2125	#ifdef VBOX
2126	/* The seek command just sends step pulses to the drive and doesn't care if
2127	* there's a medium inserted or if it's banging the head against the drive.
2128	*/
2129	cur_drv->track = fdctrl->fifo[2];
2130	cur_drv->ltrk = cur_drv->track;
2131	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2132	/* Raise Interrupt */
2133	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK \| GET_CUR_DRV(fdctrl));
2134	#else
2135	if (fdctrl->fifo[2] > cur_drv->max_track) {
2136	fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK);
2137	} else {
2138	cur_drv->track = fdctrl->fifo[2];
2139	/* Raise Interrupt */
2140	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2141	}
2142	#endif
2143	}
2144
2145	static void fdctrl_handle_perpendicular_mode(fdctrl_t *fdctrl, int direction)
2146	{
2147	RT_NOREF(direction);
2148	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2149
2150	if (fdctrl->fifo[1] & 0x80)
2151	cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
2152	/* No result back */
2153	fdctrl_reset_fifo(fdctrl);
2154	}
2155
2156	static void fdctrl_handle_configure(fdctrl_t *fdctrl, int direction)
2157	{
2158	RT_NOREF(direction);
2159	fdctrl->config = fdctrl->fifo[2];
2160	fdctrl->precomp_trk = fdctrl->fifo[3];
2161	/* No result back */
2162	fdctrl_reset_fifo(fdctrl);
2163	}
2164
2165	static void fdctrl_handle_powerdown_mode(fdctrl_t *fdctrl, int direction)
2166	{
2167	RT_NOREF(direction);
2168	fdctrl->pwrd = fdctrl->fifo[1];
2169	fdctrl->fifo[0] = fdctrl->fifo[1];
2170	fdctrl_set_fifo(fdctrl, 1, 0);
2171	}
2172
2173	static void fdctrl_handle_option(fdctrl_t *fdctrl, int direction)
2174	{
2175	RT_NOREF(direction);
2176	/* No result back */
2177	fdctrl_reset_fifo(fdctrl);
2178	}
2179
2180	static void fdctrl_handle_drive_specification_command(fdctrl_t *fdctrl, int direction)
2181	{
2182	RT_NOREF(direction);
2183	/* fdrive_t cur_drv = get_cur_drv(fdctrl); - unused /
2184
2185	/* This command takes a variable number of parameters. It can be terminated
2186	* at any time if the high bit of a parameter is set. Once there are 6 bytes
2187	* in the FIFO (command + 5 parameter bytes), data_len/data_pos will be 7.
2188	*/
2189	if (fdctrl->data_len == 7 \|\| (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80)) {
2190
2191	/* Command parameters done */
2192	if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
2193	/* Data is echoed, but not stored! */
2194	fdctrl->fifo[0] = fdctrl->data_len > 2 ? fdctrl->fifo[1] : 0;
2195	fdctrl->fifo[1] = fdctrl->data_len > 3 ? fdctrl->fifo[2] : 0;
2196	fdctrl->fifo[2] = 0;
2197	fdctrl->fifo[3] = 0;
2198	fdctrl_set_fifo(fdctrl, 4, 0);
2199	} else {
2200	fdctrl_reset_fifo(fdctrl);
2201	}
2202	} else
2203	fdctrl->data_len++; /* Wait for another byte. */
2204	}
2205
2206	static void fdctrl_handle_relative_seek_out(fdctrl_t *fdctrl, int direction)
2207	{
2208	RT_NOREF(direction);
2209	fdrive_t *cur_drv;
2210
2211	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2212	cur_drv = get_cur_drv(fdctrl);
2213	if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
2214	cur_drv->track = cur_drv->max_track - 1;
2215	} else {
2216	cur_drv->track += fdctrl->fifo[2];
2217	}
2218	fdctrl_reset_fifo(fdctrl);
2219	/* Raise Interrupt */
2220	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2221	}
2222
2223	static void fdctrl_handle_relative_seek_in(fdctrl_t *fdctrl, int direction)
2224	{
2225	RT_NOREF(direction);
2226	fdrive_t *cur_drv;
2227
2228	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2229	cur_drv = get_cur_drv(fdctrl);
2230	if (fdctrl->fifo[2] > cur_drv->track) {
2231	cur_drv->track = 0;
2232	} else {
2233	cur_drv->track -= fdctrl->fifo[2];
2234	}
2235	fdctrl_reset_fifo(fdctrl);
2236	/* Raise Interrupt */
2237	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2238	}
2239
2240	static const struct {
2241	uint8_t value;
2242	uint8_t mask;
2243	const char* name;
2244	int parameters;
2245	void (handler)(fdctrl_t fdctrl, int direction);
2246	int direction;
2247	} handlers[] = {
2248	{ FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
2249	{ FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
2250	{ FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
2251	{ FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
2252	{ FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
2253	{ FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
2254	{ FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
2255	{ FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
2256	{ FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
2257	{ FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
2258	{ FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
2259	{ FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
2260	{ FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
2261	{ FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
2262	{ FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
2263	{ FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
2264	{ FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
2265	{ FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
2266	{ FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
2267	{ FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
2268	{ FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
2269	{ FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
2270	{ FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 1, fdctrl_handle_drive_specification_command },
2271	{ FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
2272	{ FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
2273	{ FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
2274	{ FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
2275	{ FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
2276	{ FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
2277	{ FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
2278	{ FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
2279	{ 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
2280	};
2281	/* Associate command to an index in the 'handlers' array */
2282	static uint8_t command_to_handler[256];
2283
2284	static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value)
2285	{
2286	fdrive_t *cur_drv;
2287	int pos;
2288
2289	cur_drv = get_cur_drv(fdctrl);
2290	/* Reset mode */
2291	if (!(fdctrl->dor & FD_DOR_nRESET)) {
2292	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
2293	return;
2294	}
2295	if (!(fdctrl->msr & FD_MSR_RQM) \|\| (fdctrl->msr & FD_MSR_DIO)) {
2296	FLOPPY_ERROR("controller not ready for writing\n");
2297	return;
2298	}
2299	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
2300	/* Is it write command time ? */
2301	if (fdctrl->msr & FD_MSR_NONDMA) {
2302	/* FIFO data write */
2303	pos = fdctrl->data_pos++;
2304	pos %= FD_SECTOR_LEN;
2305	fdctrl->fifo[pos] = value;
2306	if (pos == FD_SECTOR_LEN - 1 \|\|
2307	fdctrl->data_pos == fdctrl->data_len) {
2308	#ifdef VBOX
2309	blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
2310	#else
2311	bdrv_write(cur_drv->bs, fd_sector(cur_drv),
2312	fdctrl->fifo, 1);
2313	#endif
2314	}
2315	/* Switch from transfer mode to status mode
2316	* then from status mode to command mode
2317	*/
2318	if (fdctrl->data_pos == fdctrl->data_len)
2319	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
2320	return;
2321	}
2322	if (fdctrl->data_pos == 0) {
2323	/* Command */
2324	fdctrl_reset_irq(fdctrl); /* If pending from previous seek/recalibrate. */
2325	pos = command_to_handler[value & 0xff];
2326	FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
2327	fdctrl->data_len = handlers[pos].parameters + 1;
2328	fdctrl->msr \|= FD_MSR_CMDBUSY;
2329	}
2330
2331	FLOPPY_DPRINTF("%s: %02x\n", __FUNCTION__, value);
2332	fdctrl->fifo[fdctrl->data_pos++ % FD_SECTOR_LEN] = value;
2333	if (fdctrl->data_pos == fdctrl->data_len) {
2334	/* We now have all parameters
2335	* and will be able to treat the command
2336	*/
2337	if (fdctrl->data_state & FD_STATE_FORMAT) {
2338	fdctrl_format_sector(fdctrl);
2339	return;
2340	}
2341
2342	pos = command_to_handler[fdctrl->fifo[0] & 0xff];
2343	FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
2344	(*handlers[pos].handler)(fdctrl, handlers[pos].direction);
2345	}
2346	}
2347
2348	static void fdctrl_result_timer(void *opaque)
2349	{
2350	fdctrl_t fdctrl = (fdctrl_t )opaque;
2351	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2352
2353	/* Pretend we are spinning.
2354	* This is needed for Coherent, which uses READ ID to check for
2355	* sector interleaving.
2356	*/
2357	if (cur_drv->last_sect != 0) {
2358	cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
2359	}
2360	/* READ_ID can't automatically succeed! */
2361	#ifdef VBOX
2362	if (!cur_drv->max_track) {
2363	FLOPPY_DPRINTF("read id when no disk in drive\n");
2364	/// @todo This is wrong! Command should not complete.
2365	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2366	} else if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
2367	FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
2368	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
2369	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2370	} else if (cur_drv->track >= cur_drv->max_track) {
2371	FLOPPY_DPRINTF("read id past last track (%d >= %d)\n",
2372	cur_drv->track, cur_drv->max_track);
2373	cur_drv->ltrk = 0;
2374	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2375	}
2376	else
2377	#endif
2378	fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
2379	}
2380
2381
2382	#ifdef VBOX
2383
2384	/* -=-=-=-=-=-=-=-=- Timer Callback -=-=-=-=-=-=-=-=- */
2385
2386	/**
2387	* @callback_method_impl{FNTMTIMERDEV}
2388	*/
2389	static DECLCALLBACK(void) fdcTimerCallback(PPDMDEVINS pDevIns, PTMTIMER pTimer, void *pvUser)
2390	{
2391	RT_NOREF(pDevIns, pTimer);
2392	fdctrl_t fdctrl = (fdctrl_t )pvUser;
2393	fdctrl_result_timer(fdctrl);
2394	}
2395
2396
2397	/* -=-=-=-=-=-=-=-=- I/O Port Access Handlers -=-=-=-=-=-=-=-=- */
2398
2399	/**
2400	* @callback_method_impl{FNIOMIOPORTOUT}
2401	*/
2402	static DECLCALLBACK(int) fdcIoPortWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT uPort, uint32_t u32, unsigned cb)
2403	{
2404	RT_NOREF(pDevIns);
2405	if (cb == 1)
2406	fdctrl_write (pvUser, uPort & 7, u32);
2407	else
2408	AssertMsgFailed(("uPort=%#x cb=%d u32=%#x\n", uPort, cb, u32));
2409	return VINF_SUCCESS;
2410	}
2411
2412
2413	/**
2414	* @callback_method_impl{FNIOMIOPORTIN}
2415	*/
2416	static DECLCALLBACK(int) fdcIoPortRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT uPort, uint32_t pu32, unsigned cb)
2417	{
2418	RT_NOREF(pDevIns);
2419	if (cb == 1)
2420	{
2421	*pu32 = fdctrl_read (pvUser, uPort & 7);
2422	return VINF_SUCCESS;
2423	}
2424	return VERR_IOM_IOPORT_UNUSED;
2425	}
2426
2427
2428	/* -=-=-=-=-=-=-=-=- Saved state -=-=-=-=-=-=-=-=- */
2429
2430	/**
2431	* @callback_method_impl{FNSSMDEVSAVEEXEC}
2432	*/
2433	static DECLCALLBACK(int) fdcSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
2434	{
2435	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2436	unsigned int i;
2437
2438	/* Save the FDC I/O registers... */
2439	SSMR3PutU8(pSSM, pThis->sra);
2440	SSMR3PutU8(pSSM, pThis->srb);
2441	SSMR3PutU8(pSSM, pThis->dor);
2442	SSMR3PutU8(pSSM, pThis->tdr);
2443	SSMR3PutU8(pSSM, pThis->dsr);
2444	SSMR3PutU8(pSSM, pThis->msr);
2445	/* ...the status registers... */
2446	SSMR3PutU8(pSSM, pThis->status0);
2447	SSMR3PutU8(pSSM, pThis->status1);
2448	SSMR3PutU8(pSSM, pThis->status2);
2449	/* ...the command FIFO... */
2450	SSMR3PutU32(pSSM, sizeof(pThis->fifo));
2451	SSMR3PutMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
2452	SSMR3PutU32(pSSM, pThis->data_pos);
2453	SSMR3PutU32(pSSM, pThis->data_len);
2454	SSMR3PutU8(pSSM, pThis->data_state);
2455	SSMR3PutU8(pSSM, pThis->data_dir);
2456	/* ...and miscellaneous internal FDC state. */
2457	SSMR3PutU8(pSSM, pThis->reset_sensei);
2458	SSMR3PutU8(pSSM, pThis->eot);
2459	SSMR3PutU8(pSSM, pThis->timer0);
2460	SSMR3PutU8(pSSM, pThis->timer1);
2461	SSMR3PutU8(pSSM, pThis->precomp_trk);
2462	SSMR3PutU8(pSSM, pThis->config);
2463	SSMR3PutU8(pSSM, pThis->lock);
2464	SSMR3PutU8(pSSM, pThis->pwrd);
2465	SSMR3PutU8(pSSM, pThis->version);
2466
2467	/* Save the number of drives and per-drive state. Note that the media
2468	* states will be updated in fd_revalidate() and need not be saved.
2469	*/
2470	SSMR3PutU8(pSSM, pThis->num_floppies);
2471	Assert(RT_ELEMENTS(pThis->drives) == pThis->num_floppies);
2472	for (i = 0; i < pThis->num_floppies; ++i)
2473	{
2474	fdrive_t *d = &pThis->drives[i];
2475
2476	SSMR3PutMem(pSSM, &d->Led, sizeof(d->Led));
2477	SSMR3PutU32(pSSM, d->drive);
2478	SSMR3PutU8(pSSM, d->dsk_chg);
2479	SSMR3PutU8(pSSM, d->perpendicular);
2480	SSMR3PutU8(pSSM, d->head);
2481	SSMR3PutU8(pSSM, d->track);
2482	SSMR3PutU8(pSSM, d->sect);
2483	}
2484	return TMR3TimerSave (pThis->result_timer, pSSM);
2485	}
2486
2487
2488	/**
2489	* @callback_method_impl{FNSSMDEVLOADEXEC}
2490	*/
2491	static DECLCALLBACK(int) fdcLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
2492	{
2493	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2494	unsigned int i;
2495	uint32_t val32;
2496	uint8_t val8;
2497
2498	if (uVersion > FDC_SAVESTATE_CURRENT)
2499	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
2500	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
2501
2502	/* The old saved state was significantly different. However, we can get
2503	* back most of the controller state and fix the rest by pretending the
2504	* disk in the drive (if any) has been replaced. At any rate there should
2505	* be no difficulty unless the state was saved during a floppy operation.
2506	*/
2507	if (uVersion == FDC_SAVESTATE_OLD)
2508	{
2509	/* First verify a few assumptions. */
2510	AssertMsgReturn(sizeof(pThis->fifo) == FD_SECTOR_LEN,
2511	("The size of FIFO in saved state doesn't match!\n"),
2512	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2513	AssertMsgReturn(RT_ELEMENTS(pThis->drives) == 2,
2514	("The number of drives in old saved state doesn't match!\n"),
2515	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2516	/* Now load the old state. */
2517	SSMR3GetU8(pSSM, &pThis->version);
2518	/* Toss IRQ level, DMA channel, I/O base, and state. */
2519	SSMR3GetU8(pSSM, &val8);
2520	SSMR3GetU8(pSSM, &val8);
2521	SSMR3GetU32(pSSM, &val32);
2522	SSMR3GetU8(pSSM, &val8);
2523	/* Translate dma_en. */
2524	SSMR3GetU8(pSSM, &val8);
2525	if (val8)
2526	pThis->dor \|= FD_DOR_DMAEN;
2527	SSMR3GetU8(pSSM, &pThis->cur_drv);
2528	/* Translate bootsel. */
2529	SSMR3GetU8(pSSM, &val8);
2530	pThis->tdr \|= val8 << 2;
2531	SSMR3GetMem(pSSM, &pThis->fifo, FD_SECTOR_LEN);
2532	SSMR3GetU32(pSSM, &pThis->data_pos);
2533	SSMR3GetU32(pSSM, &pThis->data_len);
2534	SSMR3GetU8(pSSM, &pThis->data_state);
2535	SSMR3GetU8(pSSM, &pThis->data_dir);
2536	SSMR3GetU8(pSSM, &pThis->status0);
2537	SSMR3GetU8(pSSM, &pThis->eot);
2538	SSMR3GetU8(pSSM, &pThis->timer0);
2539	SSMR3GetU8(pSSM, &pThis->timer1);
2540	SSMR3GetU8(pSSM, &pThis->precomp_trk);
2541	SSMR3GetU8(pSSM, &pThis->config);
2542	SSMR3GetU8(pSSM, &pThis->lock);
2543	SSMR3GetU8(pSSM, &pThis->pwrd);
2544
2545	for (i = 0; i < 2; ++i)
2546	{
2547	fdrive_t *d = &pThis->drives[i];
2548
2549	SSMR3GetMem (pSSM, &d->Led, sizeof (d->Led));
2550	SSMR3GetU32(pSSM, &val32);
2551	d->drive = (fdrive_type_t)val32;
2552	SSMR3GetU32(pSSM, &val32); /* Toss drflags */
2553	SSMR3GetU8(pSSM, &d->perpendicular);
2554	SSMR3GetU8(pSSM, &d->head);
2555	SSMR3GetU8(pSSM, &d->track);
2556	SSMR3GetU8(pSSM, &d->sect);
2557	SSMR3GetU8(pSSM, &val8); /* Toss dir, rw */
2558	SSMR3GetU8(pSSM, &val8);
2559	SSMR3GetU32(pSSM, &val32);
2560	d->flags = (fdrive_flags_t)val32;
2561	SSMR3GetU8(pSSM, &d->last_sect);
2562	SSMR3GetU8(pSSM, &d->max_track);
2563	SSMR3GetU16(pSSM, &d->bps);
2564	SSMR3GetU8(pSSM, &d->ro);
2565	}
2566	}
2567	else /* New state - straightforward. */
2568	{
2569	Assert(uVersion == FDC_SAVESTATE_CURRENT);
2570	/* Load the FDC I/O registers... */
2571	SSMR3GetU8(pSSM, &pThis->sra);
2572	SSMR3GetU8(pSSM, &pThis->srb);
2573	SSMR3GetU8(pSSM, &pThis->dor);
2574	SSMR3GetU8(pSSM, &pThis->tdr);
2575	SSMR3GetU8(pSSM, &pThis->dsr);
2576	SSMR3GetU8(pSSM, &pThis->msr);
2577	/* ...the status registers... */
2578	SSMR3GetU8(pSSM, &pThis->status0);
2579	SSMR3GetU8(pSSM, &pThis->status1);
2580	SSMR3GetU8(pSSM, &pThis->status2);
2581	/* ...the command FIFO, if the size matches... */
2582	SSMR3GetU32(pSSM, &val32);
2583	AssertMsgReturn(sizeof(pThis->fifo) == val32,
2584	("The size of FIFO in saved state doesn't match!\n"),
2585	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2586	SSMR3GetMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
2587	SSMR3GetU32(pSSM, &pThis->data_pos);
2588	SSMR3GetU32(pSSM, &pThis->data_len);
2589	SSMR3GetU8(pSSM, &pThis->data_state);
2590	SSMR3GetU8(pSSM, &pThis->data_dir);
2591	/* ...and miscellaneous internal FDC state. */
2592	SSMR3GetU8(pSSM, &pThis->reset_sensei);
2593	SSMR3GetU8(pSSM, &pThis->eot);
2594	SSMR3GetU8(pSSM, &pThis->timer0);
2595	SSMR3GetU8(pSSM, &pThis->timer1);
2596	SSMR3GetU8(pSSM, &pThis->precomp_trk);
2597	SSMR3GetU8(pSSM, &pThis->config);
2598	SSMR3GetU8(pSSM, &pThis->lock);
2599	SSMR3GetU8(pSSM, &pThis->pwrd);
2600	SSMR3GetU8(pSSM, &pThis->version);
2601
2602	/* Validate the number of drives. */
2603	SSMR3GetU8(pSSM, &pThis->num_floppies);
2604	AssertMsgReturn(RT_ELEMENTS(pThis->drives) == pThis->num_floppies,
2605	("The number of drives in saved state doesn't match!\n"),
2606	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2607
2608	/* Load the per-drive state. */
2609	for (i = 0; i < pThis->num_floppies; ++i)
2610	{
2611	fdrive_t *d = &pThis->drives[i];
2612
2613	SSMR3GetMem(pSSM, &d->Led, sizeof(d->Led));
2614	SSMR3GetU32(pSSM, &val32);
2615	d->drive = (fdrive_type_t)val32;
2616	SSMR3GetU8(pSSM, &d->dsk_chg);
2617	SSMR3GetU8(pSSM, &d->perpendicular);
2618	SSMR3GetU8(pSSM, &d->head);
2619	SSMR3GetU8(pSSM, &d->track);
2620	SSMR3GetU8(pSSM, &d->sect);
2621	}
2622	}
2623	return TMR3TimerLoad (pThis->result_timer, pSSM);
2624	}
2625
2626
2627	/* -=-=-=-=-=-=-=-=- Drive level interfaces -=-=-=-=-=-=-=-=- */
2628
2629	/**
2630	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnMountNotify}
2631	*/
2632	static DECLCALLBACK(void) fdMountNotify(PPDMIMOUNTNOTIFY pInterface)
2633	{
2634	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
2635	LogFlow(("fdMountNotify:\n"));
2636	fd_revalidate(pDrv);
2637	}
2638
2639
2640	/**
2641	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnUnmountNotify}
2642	*/
2643	static DECLCALLBACK(void) fdUnmountNotify(PPDMIMOUNTNOTIFY pInterface)
2644	{
2645	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
2646	LogFlow(("fdUnmountNotify:\n"));
2647	fd_revalidate(pDrv);
2648	}
2649
2650
2651	/**
2652	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2653	*/
2654	static DECLCALLBACK(void ) fdQueryInterface (PPDMIBASE pInterface, const char pszIID)
2655	{
2656	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IBase);
2657
2658	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrv->IBase);
2659	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAPORT, &pDrv->IPort);
2660	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUNTNOTIFY, &pDrv->IMountNotify);
2661	return NULL;
2662	}
2663
2664
2665	/**
2666	* @interface_method_impl{PDMIMEDIAPORT,pfnQueryDeviceLocation}
2667	*/
2668	static DECLCALLBACK(int) fdQueryDeviceLocation(PPDMIMEDIAPORT pInterface, const char **ppcszController,
2669	uint32_t piInstance, uint32_t piLUN)
2670	{
2671	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IPort);
2672	PPDMDEVINS pDevIns = pDrv->pDevIns;
2673
2674	AssertPtrReturn(ppcszController, VERR_INVALID_POINTER);
2675	AssertPtrReturn(piInstance, VERR_INVALID_POINTER);
2676	AssertPtrReturn(piLUN, VERR_INVALID_POINTER);
2677
2678	*ppcszController = pDevIns->pReg->szName;
2679	*piInstance = pDevIns->iInstance;
2680	*piLUN = pDrv->iLUN;
2681
2682	return VINF_SUCCESS;
2683	}
2684
2685	/* -=-=-=-=-=-=-=-=- Controller level interfaces -=-=-=-=-=-=-=-=- */
2686
2687	/**
2688	* @interface_method_impl{PDMILEDPORTS,pfnQueryStatusLed}
2689	*/
2690	static DECLCALLBACK(int) fdcStatusQueryStatusLed(PPDMILEDPORTS pInterface, unsigned iLUN, PPDMLED *ppLed)
2691	{
2692	fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, ILeds);
2693	if (iLUN < RT_ELEMENTS(pThis->drives)) {
2694	*ppLed = &pThis->drives[iLUN].Led;
2695	Assert ((*ppLed)->u32Magic == PDMLED_MAGIC);
2696	return VINF_SUCCESS;
2697	}
2698	return VERR_PDM_LUN_NOT_FOUND;
2699	}
2700
2701
2702	/**
2703	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2704	*/
2705	static DECLCALLBACK(void ) fdcStatusQueryInterface(PPDMIBASE pInterface, const char pszIID)
2706	{
2707	fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, IBaseStatus);
2708
2709	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThis->IBaseStatus);
2710	PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThis->ILeds);
2711	return NULL;
2712	}
2713
2714
2715	/**
2716	* Configure a drive.
2717	*
2718	* @returns VBox status code.
2719	* @param drv The drive in question.
2720	* @param pDevIns The driver instance.
2721	* @param fInit Set if we're at init time and can change the drive type.
2722	*/
2723	static int fdConfig(fdrive_t *drv, PPDMDEVINS pDevIns, bool fInit)
2724	{
2725	static const char * const s_apszDesc[] = {"Floppy Drive A:", "Floppy Drive B"};
2726	int rc;
2727
2728	/*
2729	* Reset the LED just to be on the safe side.
2730	*/
2731	Assert (RT_ELEMENTS(s_apszDesc) > drv->iLUN);
2732	Assert (drv->Led.u32Magic == PDMLED_MAGIC);
2733	drv->Led.Actual.u32 = 0;
2734	drv->Led.Asserted.u32 = 0;
2735
2736	/*
2737	* Try attach the block device and get the interfaces.
2738	*/
2739	rc = PDMDevHlpDriverAttach (pDevIns, drv->iLUN, &drv->IBase, &drv->pDrvBase, s_apszDesc[drv->iLUN]);
2740	if (RT_SUCCESS (rc)) {
2741	drv->pDrvMedia = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMEDIA);
2742	if (drv->pDrvMedia) {
2743	drv->pDrvMount = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMOUNT);
2744	if (drv->pDrvMount) {
2745	fd_init(drv, fInit);
2746	} else {
2747	AssertMsgFailed (("Configuration error: LUN#%d without mountable interface!\n", drv->iLUN));
2748	rc = VERR_PDM_MISSING_INTERFACE;
2749	}
2750
2751	} else {
2752	AssertMsgFailed (("Configuration error: LUN#%d hasn't a block interface!\n", drv->iLUN));
2753	rc = VERR_PDM_MISSING_INTERFACE;
2754	}
2755	} else {
2756	AssertMsg (rc == VERR_PDM_NO_ATTACHED_DRIVER,
2757	("Failed to attach LUN#%d. rc=%Rrc\n", drv->iLUN, rc));
2758	switch (rc) {
2759	case VERR_ACCESS_DENIED:
2760	/* Error already cached by DrvHostBase */
2761	break;
2762	case VERR_PDM_NO_ATTACHED_DRIVER:
2763	/* Legal on architectures without a floppy controller */
2764	break;
2765	default:
2766	rc = PDMDevHlpVMSetError (pDevIns, rc, RT_SRC_POS,
2767	N_ ("The floppy controller cannot attach to the floppy drive"));
2768	break;
2769	}
2770	}
2771
2772	if (RT_FAILURE (rc)) {
2773	drv->pDrvBase = NULL;
2774	drv->pDrvMedia = NULL;
2775	drv->pDrvMount = NULL;
2776	}
2777	LogFlow (("fdConfig: returns %Rrc\n", rc));
2778	return rc;
2779	}
2780
2781
2782	/**
2783	* @interface_method_impl{PDMDEVREG,pfnAttach}
2784	*
2785	* This is called when we change block driver for a floppy drive.
2786	*/
2787	static DECLCALLBACK(int) fdcAttach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
2788	{
2789	fdctrl_t fdctrl = PDMINS_2_DATA(pDevIns, fdctrl_t );
2790	fdrive_t *drv;
2791	int rc;
2792	LogFlow (("ideDetach: iLUN=%u\n", iLUN));
2793
2794	AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
2795	("The FDC device does not support hotplugging\n"),
2796	VERR_INVALID_PARAMETER);
2797
2798	/*
2799	* Validate.
2800	*/
2801	if (iLUN >= 2) {
2802	AssertMsgFailed (("Configuration error: cannot attach or detach any but the first two LUNs - iLUN=%u\n",
2803	iLUN));
2804	return VERR_PDM_DEVINS_NO_ATTACH;
2805	}
2806
2807	/*
2808	* Locate the drive and stuff.
2809	*/
2810	drv = &fdctrl->drives[iLUN];
2811
2812	/* the usual paranoia */
2813	AssertRelease (!drv->pDrvBase);
2814	AssertRelease (!drv->pDrvMedia);
2815	AssertRelease (!drv->pDrvMount);
2816
2817	rc = fdConfig (drv, pDevIns, false /fInit/);
2818	AssertMsg (rc != VERR_PDM_NO_ATTACHED_DRIVER,
2819	("Configuration error: failed to configure drive %d, rc=%Rrc\n", iLUN, rc));
2820	if (RT_SUCCESS(rc)) {
2821	fd_revalidate (drv);
2822	}
2823
2824	LogFlow (("floppyAttach: returns %Rrc\n", rc));
2825	return rc;
2826	}
2827
2828
2829	/**
2830	* @interface_method_impl{PDMDEVREG,pfnDetach}
2831	*
2832	* The floppy drive has been temporarily 'unplugged'.
2833	*/
2834	static DECLCALLBACK(void) fdcDetach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
2835	{
2836	RT_NOREF(fFlags);
2837	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2838	LogFlow (("ideDetach: iLUN=%u\n", iLUN));
2839
2840	switch (iLUN)
2841	{
2842	case 0:
2843	case 1:
2844	{
2845	fdrive_t *drv = &pThis->drives[iLUN];
2846	drv->pDrvBase = NULL;
2847	drv->pDrvMedia = NULL;
2848	drv->pDrvMount = NULL;
2849	break;
2850	}
2851
2852	default:
2853	AssertMsgFailed(("Cannot detach LUN#%d!\n", iLUN));
2854	break;
2855	}
2856	}
2857
2858
2859	/**
2860	* @interface_method_impl{PDMDEVREG,pfnReset}
2861	*
2862	* I haven't check the specs on what's supposed to happen on reset, but we
2863	* should get any 'FATAL: floppy recal:f07 ctrl not ready' when resetting
2864	* at wrong time like we do if this was all void.
2865	*/
2866	static DECLCALLBACK(void) fdcReset(PPDMDEVINS pDevIns)
2867	{
2868	fdctrl_t pThis = PDMINS_2_DATA (pDevIns, fdctrl_t );
2869	unsigned i;
2870	LogFlow (("fdcReset:\n"));
2871
2872	fdctrl_reset(pThis, 0);
2873
2874	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
2875	fd_revalidate(&pThis->drives[i]);
2876	}
2877
2878
2879	/**
2880	* @interface_method_impl{PDMDEVREG,pfnConstruct}
2881	*/
2882	static DECLCALLBACK(int) fdcConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
2883	{
2884	RT_NOREF(iInstance);
2885	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2886	int rc;
2887	unsigned i, j;
2888	int ii;
2889	bool mem_mapped;
2890	uint16_t io_base;
2891	uint8_t irq_lvl, dma_chann;
2892	PPDMIBASE pBase;
2893
2894	Assert(iInstance == 0);
2895	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
2896
2897	/*
2898	* Validate configuration.
2899	*/
2900	if (!CFGMR3AreValuesValid(pCfg, "IRQ\0DMA\0MemMapped\0IOBase\0"))
2901	return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
2902
2903	/*
2904	* Read the configuration.
2905	*/
2906	rc = CFGMR3QueryU8Def(pCfg, "IRQ", &irq_lvl, 6);
2907	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 IRQ, rc=%Rrc\n", rc), rc);
2908
2909	rc = CFGMR3QueryU8Def(pCfg, "DMA", &dma_chann, 2);
2910	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 DMA, rc=%Rrc\n", rc), rc);
2911
2912	rc = CFGMR3QueryU16Def(pCfg, "IOBase", &io_base, 0x3f0);
2913	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U16 IOBase, rc=%Rrc\n", rc), rc);
2914
2915	rc = CFGMR3QueryBoolDef(pCfg, "MemMapped", &mem_mapped, false);
2916	AssertMsgRCReturn(rc, ("Configuration error: Failed to read bool value MemMapped rc=%Rrc\n", rc), rc);
2917
2918	/*
2919	* Initialize data.
2920	*/
2921	LogFlow(("fdcConstruct: irq_lvl=%d dma_chann=%d io_base=%#x\n", irq_lvl, dma_chann, io_base));
2922	pThis->pDevIns = pDevIns;
2923	pThis->version = 0x90; /* Intel 82078 controller */
2924	pThis->irq_lvl = irq_lvl;
2925	pThis->dma_chann = dma_chann;
2926	pThis->io_base = io_base;
2927	pThis->config = FD_CONFIG_EIS \| FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
2928	pThis->num_floppies = MAX_FD;
2929
2930	/* Fill 'command_to_handler' lookup table */
2931	for (ii = RT_ELEMENTS(handlers) - 1; ii >= 0; ii--)
2932	for (j = 0; j < sizeof(command_to_handler); j++)
2933	if ((j & handlers[ii].mask) == handlers[ii].value)
2934	command_to_handler[j] = ii;
2935
2936	pThis->IBaseStatus.pfnQueryInterface = fdcStatusQueryInterface;
2937	pThis->ILeds.pfnQueryStatusLed = fdcStatusQueryStatusLed;
2938
2939	for (i = 0; i < RT_ELEMENTS(pThis->drives); ++i)
2940	{
2941	fdrive_t *pDrv = &pThis->drives[i];
2942
2943	pDrv->drive = FDRIVE_DRV_NONE;
2944	pDrv->iLUN = i;
2945	pDrv->pDevIns = pDevIns;
2946
2947	pDrv->IBase.pfnQueryInterface = fdQueryInterface;
2948	pDrv->IMountNotify.pfnMountNotify = fdMountNotify;
2949	pDrv->IMountNotify.pfnUnmountNotify = fdUnmountNotify;
2950	pDrv->IPort.pfnQueryDeviceLocation = fdQueryDeviceLocation;
2951	pDrv->Led.u32Magic = PDMLED_MAGIC;
2952	}
2953
2954	/*
2955	* Create the FDC timer.
2956	*/
2957	rc = PDMDevHlpTMTimerCreate(pDevIns, TMCLOCK_VIRTUAL, fdcTimerCallback, pThis,
2958	TMTIMER_FLAGS_DEFAULT_CRIT_SECT, "FDC Timer", &pThis->result_timer);
2959	if (RT_FAILURE(rc))
2960	return rc;
2961
2962	/*
2963	* Register DMA channel.
2964	*/
2965	if (pThis->dma_chann != 0xff)
2966	{
2967	rc = PDMDevHlpDMARegister(pDevIns, dma_chann, &fdctrl_transfer_handler, pThis);
2968	if (RT_FAILURE(rc))
2969	return rc;
2970	}
2971
2972	/*
2973	* IO / MMIO.
2974	*/
2975	if (mem_mapped)
2976	{
2977	AssertMsgFailed(("Memory mapped floppy not support by now\n"));
2978	return VERR_NOT_SUPPORTED;
2979	#if 0
2980	FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
2981	io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
2982	cpu_register_physical_memory(base, 0x08, io_mem);
2983	#endif
2984	}
2985	else
2986	{
2987	rc = PDMDevHlpIOPortRegister(pDevIns, io_base + 0x1, 5, pThis,
2988	fdcIoPortWrite, fdcIoPortRead, NULL, NULL, "FDC#1");
2989	if (RT_FAILURE(rc))
2990	return rc;
2991
2992	rc = PDMDevHlpIOPortRegister(pDevIns, io_base + 0x7, 1, pThis,
2993	fdcIoPortWrite, fdcIoPortRead, NULL, NULL, "FDC#2");
2994	if (RT_FAILURE(rc))
2995	return rc;
2996	}
2997
2998	/*
2999	* Register the saved state data unit.
3000	*/
3001	rc = PDMDevHlpSSMRegister(pDevIns, FDC_SAVESTATE_CURRENT, sizeof(*pThis), fdcSaveExec, fdcLoadExec);
3002	if (RT_FAILURE(rc))
3003	return rc;
3004
3005	/*
3006	* Attach the status port (optional).
3007	*/
3008	rc = PDMDevHlpDriverAttach(pDevIns, PDM_STATUS_LUN, &pThis->IBaseStatus, &pBase, "Status Port");
3009	if (RT_SUCCESS (rc))
3010	pThis->pLedsConnector = PDMIBASE_QUERY_INTERFACE(pBase, PDMILEDCONNECTORS);
3011	else if (rc != VERR_PDM_NO_ATTACHED_DRIVER)
3012	{
3013	AssertMsgFailed(("Failed to attach to status driver. rc=%Rrc\n", rc));
3014	return rc;
3015	}
3016
3017	/*
3018	* Initialize drives.
3019	*/
3020	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
3021	{
3022	fdrive_t *pDrv = &pThis->drives[i];
3023	rc = fdConfig(pDrv, pDevIns, true /fInit/);
3024	if ( RT_FAILURE(rc)
3025	&& rc != VERR_PDM_NO_ATTACHED_DRIVER)
3026	{
3027	AssertMsgFailed(("Configuration error: failed to configure drive %d, rc=%Rrc\n", i, rc));
3028	return rc;
3029	}
3030	}
3031
3032	fdctrl_reset(pThis, 0);
3033
3034	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
3035	fd_revalidate(&pThis->drives[i]);
3036
3037	return VINF_SUCCESS;
3038	}
3039
3040
3041	/**
3042	* The device registration structure.
3043	*/
3044	const PDMDEVREG g_DeviceFloppyController =
3045	{
3046	/* u32Version */
3047	PDM_DEVREG_VERSION,
3048	/* szName */
3049	"i82078",
3050	/* szRCMod */
3051	"",
3052	/* szR0Mod */
3053	"",
3054	/* pszDescription */
3055	"Floppy drive controller (Intel 82078)",
3056	/* fFlags */
3057	PDM_DEVREG_FLAGS_DEFAULT_BITS,
3058	/* fClass */
3059	PDM_DEVREG_CLASS_STORAGE,
3060	/* cMaxInstances */
3061	1,
3062	/* cbInstance */
3063	sizeof(fdctrl_t),
3064	/* pfnConstruct */
3065	fdcConstruct,
3066	/* pfnDestruct */
3067	NULL,
3068	/* pfnRelocate */
3069	NULL,
3070	/* pfnMemSetup */
3071	NULL,
3072	/* pfnPowerOn */
3073	NULL,
3074	/* pfnReset */
3075	fdcReset,
3076	/* pfnSuspend */
3077	NULL,
3078	/* pfnResume */
3079	NULL,
3080	/* pfnAttach */
3081	fdcAttach,
3082	/* pfnDetach */
3083	fdcDetach,
3084	/* pfnQueryInterface. */
3085	NULL,
3086	/* pfnInitComplete */
3087	NULL,
3088	/* pfnPowerOff */
3089	NULL,
3090	/* pfnSoftReset */
3091	NULL,
3092	/* u32VersionEnd */
3093	PDM_DEVREG_VERSION
3094	};
3095
3096	#endif /* VBOX */
3097
3098	/*
3099	* Local Variables:
3100	* mode: c
3101	* c-file-style: "k&r"
3102	* indent-tabs-mode: nil
3103	* End:
3104	*/
3105

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source: vbox/trunk/src/VBox/Devices/Storage/DevFdc.cpp@ 77807

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