DevFdc.cpp@ 63942

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1	/* $Id: DevFdc.cpp 63562 2016-08-16 14:04:03Z vboxsync $ */
2	/** @file
3	* VBox storage devices - Floppy disk controller
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 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 fdisk_type_t {
104	FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
105	FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
106	FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
107	FDRIVE_DISK_USER = 0x04, /* User defined geometry */
108	FDRIVE_DISK_NONE = 0x05 /* No disk */
109	} fdisk_type_t;
110
111	typedef enum fdrive_type_t {
112	FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
113	FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
114	FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
115	FDRIVE_DRV_NONE = 0x03 /* No drive connected */
116	#ifdef VBOX
117	, FDRIVE_DRV_FAKE_15_6 = 0x0e /* Fake 15.6 MB drive. */
118	, FDRIVE_DRV_FAKE_63_5 = 0x0f /* Fake 63.5 MB drive. */
119	#endif
120	} fdrive_type_t;
121
122	typedef uint8_t fdrive_flags_t;
123	#define FDISK_DBL_SIDES UINT8_C(0x01)
124
125	typedef enum fdrive_rate_t {
126	FDRIVE_RATE_500K = 0x00, /* 500 Kbps */
127	FDRIVE_RATE_300K = 0x01, /* 300 Kbps */
128	FDRIVE_RATE_250K = 0x02, /* 250 Kbps */
129	FDRIVE_RATE_1M = 0x03 /* 1 Mbps */
130	} fdrive_rate_t;
131
132	/**
133	* The status for one drive.
134	*
135	* @implements PDMIBASE
136	* @implements PDMIMEDIAPORT
137	* @implements PDMIMOUNTNOTIFY
138	*/
139	typedef struct fdrive_t {
140	#ifndef VBOX
141	BlockDriverState *bs;
142	#else /* VBOX */
143	/** Pointer to the attached driver's base interface. */
144	R3PTRTYPE(PPDMIBASE) pDrvBase;
145	/** Pointer to the attached driver's block interface. */
146	R3PTRTYPE(PPDMIMEDIA) pDrvMedia;
147	/** Pointer to the attached driver's mount interface.
148	* This is NULL if the driver isn't a removable unit. */
149	R3PTRTYPE(PPDMIMOUNT) pDrvMount;
150	/** The base interface. */
151	PDMIBASE IBase;
152	/** The block port interface. */
153	PDMIMEDIAPORT IPort;
154	/** The mount notify interface. */
155	PDMIMOUNTNOTIFY IMountNotify;
156	/** The LUN #. */
157	RTUINT iLUN;
158	/** The LED for this LUN. */
159	PDMLED Led;
160	#endif
161	/* Drive status */
162	fdrive_type_t drive;
163	uint8_t perpendicular; /* 2.88 MB access mode */
164	uint8_t dsk_chg; /* Disk change line */
165	/* Position */
166	uint8_t head;
167	uint8_t track;
168	uint8_t sect;
169	uint8_t ltrk; /* Logical track */
170	/* Media */
171	fdrive_flags_t flags;
172	uint8_t last_sect; /* Nb sector per track */
173	uint8_t max_track; /* Nb of tracks */
174	uint16_t bps; /* Bytes per sector */
175	uint8_t ro; /* Is read-only */
176	uint8_t media_rate; /* Data rate of medium */
177	} fdrive_t;
178
179	#define NUM_SIDES(drv) (drv->flags & FDISK_DBL_SIDES ? 2 : 1)
180
181	static void fd_init(fdrive_t *drv, bool fInit)
182	{
183	/* Drive */
184	#ifndef VBOX
185	drv->drive = FDRIVE_DRV_NONE;
186	#else /* VBOX */
187	if (fInit) {
188	/* Fixate the drive type at init time if possible. */
189	if (drv->pDrvMedia) {
190	PDMMEDIATYPE enmType = drv->pDrvMedia->pfnGetType(drv->pDrvMedia);
191	switch (enmType) {
192	case PDMMEDIATYPE_FLOPPY_360:
193	case PDMMEDIATYPE_FLOPPY_1_20:
194	drv->drive = FDRIVE_DRV_120;
195	break;
196	case PDMMEDIATYPE_FLOPPY_720:
197	case PDMMEDIATYPE_FLOPPY_1_44:
198	drv->drive = FDRIVE_DRV_144;
199	break;
200	default:
201	AssertFailed();
202	case PDMMEDIATYPE_FLOPPY_2_88:
203	drv->drive = FDRIVE_DRV_288;
204	break;
205	case PDMMEDIATYPE_FLOPPY_FAKE_15_6:
206	drv->drive = FDRIVE_DRV_FAKE_15_6;
207	break;
208	case PDMMEDIATYPE_FLOPPY_FAKE_63_5:
209	drv->drive = FDRIVE_DRV_FAKE_63_5;
210	break;
211	}
212	} else {
213	drv->drive = FDRIVE_DRV_NONE;
214	}
215	} /* else: The BIOS (and others) get the drive type via the CMOS, so
216	don't change it after the VM has been constructed. */
217	#endif /* VBOX */
218	drv->perpendicular = 0;
219	/* Disk */
220	drv->last_sect = 0;
221	drv->max_track = 0;
222	}
223
224	static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
225	uint8_t last_sect, uint8_t num_sides)
226	{
227	return (((track * num_sides) + head) * last_sect) + sect - 1; /* sect >= 1 */
228	}
229
230	/* Returns current position, in sectors, for given drive */
231	static int fd_sector(fdrive_t *drv)
232	{
233	return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, NUM_SIDES(drv));
234	}
235
236	/* Seek to a new position:
237	* returns 0 if already on right track
238	* returns 1 if track changed
239	* returns 2 if track is invalid
240	* returns 3 if sector is invalid
241	* returns 4 if seek is disabled
242	* returns 5 if no media in drive
243	*/
244	static int fd_seek(fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
245	int enable_seek)
246	{
247	int sector;
248	int ret;
249
250	if (!drv->last_sect) {
251	FLOPPY_DPRINTF("no disk in drive (max=%d %d %02x %02x)\n",
252	1, (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
253	drv->max_track, drv->last_sect);
254	return 5;
255	}
256	if (track > drv->max_track \|\|
257	(head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
258	FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
259	head, track, sect, 1,
260	(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
261	drv->max_track, drv->last_sect);
262	return 2;
263	}
264	if (sect > drv->last_sect \|\| sect < 1) {
265	FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
266	head, track, sect, 1,
267	(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
268	drv->max_track, drv->last_sect);
269	return 3;
270	}
271	sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
272	ret = 0;
273	if (sector != fd_sector(drv)) {
274	#if 0
275	if (!enable_seek) {
276	FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
277	head, track, sect, 1, drv->max_track, drv->last_sect);
278	return 4;
279	}
280	#else
281	RT_NOREF(enable_seek);
282	#endif
283	drv->head = head;
284	if (drv->track != track)
285	ret = 1;
286	drv->track = track;
287	drv->sect = sect;
288	}
289	drv->ltrk = drv->track;
290
291	return ret;
292	}
293
294	/* Set drive back to track 0 */
295	static void fd_recalibrate(fdrive_t *drv)
296	{
297	FLOPPY_DPRINTF("recalibrate\n");
298	drv->head = 0;
299	drv->track = 0;
300	drv->ltrk = 0;
301	drv->sect = 1;
302	}
303
304	/* Recognize floppy formats */
305	typedef struct fd_format_t {
306	fdrive_type_t drive;
307	fdisk_type_t disk;
308	uint8_t last_sect; /*< Number of sectors. /
309	uint8_t max_track; /*< Number of tracks. /
310	uint8_t max_head; /*< Max head number. /
311	fdrive_rate_t rate;
312	const char *str;
313	} fd_format_t;
314
315	/* Note: Low-density disks (160K/180K/320K/360K) use 250 Kbps data rate
316	* in 40-track drives, but 300 Kbps in high-capacity 80-track drives.
317	*/
318	static fd_format_t fd_formats[] = {
319	/* First entry is default format */
320	/* 1.44 MB 3"1/2 floppy disks */
321	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 3\"1/2", },
322	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 3\"1/2", },
323	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB 3\"1/2", },
324	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB 3\"1/2", },
325	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB 3\"1/2", },
326	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB 3\"1/2", },
327	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB 3\"1/2", },
328	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB 3\"1/2", },
329	/* 2.88 MB 3"1/2 floppy disks */
330	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB 3\"1/2", },
331	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB 3\"1/2", },
332	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB 3\"1/2", },
333	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB 3\"1/2", },
334	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB 3\"1/2", },
335	/* 720 kB 3"1/2 floppy disks */
336	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, FDRIVE_RATE_250K, "720 kB 3\"1/2", },
337	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K, "800 kB 3\"1/2", },
338	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K, "820 kB 3\"1/2", },
339	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K, "830 kB 3\"1/2", },
340	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB 3\"1/2", },
341	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB 3\"1/2", },
342	/* 1.2 MB 5"1/4 floppy disks */
343	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 5\"1/4", },
344	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 5\"1/4", }, /* CP Backup 5.25" HD */
345	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 5\"1/4", },
346	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, FDRIVE_RATE_500K, "1.48 MB 5\"1/4", },
347	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, FDRIVE_RATE_500K, "1.49 MB 5\"1/4", },
348	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 5\"1/4", },
349	/* 720 kB 5"1/4 floppy disks */
350	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, FDRIVE_RATE_250K, "720 kB 5\"1/4", },
351	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, FDRIVE_RATE_250K, "880 kB 5\"1/4", },
352	/* 360 kB 5"1/4 floppy disks (newer 9-sector formats) */
353	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 5\"1/4", },
354	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 5\"1/4", },
355	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 5\"1/4", }, /* CP Backup 5.25" DD */
356	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, FDRIVE_RATE_300K, "410 kB 5\"1/4", },
357	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, FDRIVE_RATE_300K, "420 kB 5\"1/4", },
358	/* 320 kB 5"1/4 floppy disks (old 8-sector formats) */
359	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 5\"1/4", },
360	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 5\"1/4", },
361	/* 1.2 MB and low density 3"1/2 floppy 'aliases' */
362	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 3\"1/2", },
363	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 3\"1/2", },
364	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 3\"1/2", }, /* CP Backup 5.25" DD */
365	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 3\"1/2", },
366	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 3\"1/2", },
367	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 3\"1/2", },
368	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 3\"1/2", },
369	#ifdef VBOX /* For larger than real life floppy images (see DrvBlock.cpp). */
370	/* 15.6 MB fake floppy disk (just need something big). */
371	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_USER, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 15.6", },
372	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 15.6", },
373	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 15.6", },
374	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 15.6", },
375	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 15.6", },
376	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 15.6", },
377	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 15.6", },
378	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 15.6", },
379	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 15.6", },
380	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 15.6", },
381	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 15.6", },
382	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 15.6", },
383	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 15.6", },
384	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 15.6", },
385	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 15.6", },
386	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 15.6", },
387	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 15.6", },
388	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 15.6", },
389	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 15.6", },
390	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 15.6", },
391	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 15.6", },
392	/* 63.5 MB fake floppy disk (just need something big). */
393	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_USER, 255, 255, 1, FDRIVE_RATE_1M, "63.5 MB fake 63.5", },
394	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_USER, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 63.5", },
395	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 63.5", },
396	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 63.5", },
397	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 63.5", },
398	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 63.5", },
399	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 63.5", },
400	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 63.5", },
401	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 63.5", },
402	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 63.5", },
403	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 63.5", },
404	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 63.5", },
405	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 63.5", },
406	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 63.5", },
407	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 63.5", },
408	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 63.5", },
409	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 63.5", },
410	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 63.5", },
411	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 63.5", },
412	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 63.5", },
413	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 63.5", },
414	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 63.5", },
415	#endif
416	/* end */
417	{ FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, (uint8_t)-1, (uint8_t)-1, 0, (fdrive_rate_t)0, NULL, },
418	};
419
420	/* Revalidate a disk drive after a disk change */
421	static void fd_revalidate(fdrive_t *drv)
422	{
423	const fd_format_t *parse;
424	uint64_t nb_sectors, size;
425	int i, first_match, match;
426	int nb_heads, max_track, last_sect, ro;
427
428	FLOPPY_DPRINTF("revalidate\n");
429	#ifndef VBOX
430	if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
431	ro = bdrv_is_read_only(drv->bs);
432	bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
433	#else /* VBOX */
434	if ( drv->pDrvMedia
435	&& drv->pDrvMount
436	&& drv->pDrvMount->pfnIsMounted (drv->pDrvMount)) {
437	ro = drv->pDrvMedia->pfnIsReadOnly (drv->pDrvMedia);
438	nb_heads = max_track = last_sect = 0;
439	#endif /* VBOX */
440	if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
441	FLOPPY_DPRINTF("User defined disk (%d %d %d)",
442	nb_heads - 1, max_track, last_sect);
443	} else {
444	#ifndef VBOX
445	bdrv_get_geometry(drv->bs, &nb_sectors);
446	#else /* VBOX */
447	{
448	uint64_t size2 = drv->pDrvMedia->pfnGetSize (drv->pDrvMedia);
449	nb_sectors = size2 / FD_SECTOR_LEN;
450	}
451	#endif /* VBOX */
452	match = -1;
453	first_match = -1;
454	for (i = 0;; i++) {
455	parse = &fd_formats[i];
456	if (parse->drive == FDRIVE_DRV_NONE)
457	break;
458	if (drv->drive == parse->drive \|\|
459	drv->drive == FDRIVE_DRV_NONE) {
460	size = (parse->max_head + 1) * parse->max_track *
461	parse->last_sect;
462	if (nb_sectors == size) {
463	match = i;
464	break;
465	}
466	if (first_match == -1)
467	first_match = i;
468	}
469	}
470	if (match == -1) {
471	if (first_match == -1)
472	match = 1;
473	else
474	match = first_match;
475	parse = &fd_formats[match];
476	}
477	nb_heads = parse->max_head + 1;
478	max_track = parse->max_track;
479	last_sect = parse->last_sect;
480	drv->drive = parse->drive;
481	#ifdef VBOX
482	drv->media_rate = parse->rate;
483	#endif
484	FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
485	nb_heads, max_track, last_sect, ro ? "ro" : "rw");
486	LogRel(("FDC: %s floppy disk (%d h %d t %d s) %s\n", parse->str,
487	nb_heads, max_track, last_sect, ro ? "ro" : "rw"));
488	}
489	if (nb_heads == 1) {
490	drv->flags &= ~FDISK_DBL_SIDES;
491	} else {
492	drv->flags \|= FDISK_DBL_SIDES;
493	}
494	drv->max_track = max_track;
495	drv->last_sect = last_sect;
496	drv->ro = ro;
497	} else {
498	FLOPPY_DPRINTF("No disk in drive\n");
499	drv->last_sect = 0;
500	drv->max_track = 0;
501	drv->flags &= ~FDISK_DBL_SIDES;
502	drv->dsk_chg = true; /* Disk change line active. */
503	}
504	}
505
506	/********************************************************/
507	/* Intel 82078 floppy disk controller emulation */
508
509	static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq);
510	static void fdctrl_reset_fifo(fdctrl_t *fdctrl);
511	#ifndef VBOX
512	static int fdctrl_transfer_handler (void *opaque, int nchan,
513	int dma_pos, int dma_len);
514	#else /* VBOX: */
515	static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
516	void *opaque,
517	unsigned nchan,
518	uint32_t dma_pos,
519	uint32_t dma_len);
520	#endif /* VBOX */
521	static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0);
522	static fdrive_t get_cur_drv(fdctrl_t fdctrl);
523
524	static void fdctrl_result_timer(void *opaque);
525	static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl);
526	static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl);
527	static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl);
528	static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value);
529	static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl);
530	static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value);
531	static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl);
532	static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value);
533	static uint32_t fdctrl_read_data(fdctrl_t *fdctrl);
534	static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value);
535	static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl);
536	static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value);
537
538	enum {
539	FD_DIR_WRITE = 0,
540	FD_DIR_READ = 1,
541	FD_DIR_SCANE = 2,
542	FD_DIR_SCANL = 3,
543	FD_DIR_SCANH = 4,
544	FD_DIR_FORMAT = 5
545	};
546
547	enum {
548	FD_STATE_MULTI = 0x01, /* multi track flag */
549	FD_STATE_FORMAT = 0x02, /* format flag */
550	FD_STATE_SEEK = 0x04 /* seek flag */
551	};
552
553	enum {
554	FD_REG_SRA = 0x00,
555	FD_REG_SRB = 0x01,
556	FD_REG_DOR = 0x02,
557	FD_REG_TDR = 0x03,
558	FD_REG_MSR = 0x04,
559	FD_REG_DSR = 0x04,
560	FD_REG_FIFO = 0x05,
561	FD_REG_DIR = 0x07,
562	FD_REG_CCR = 0x07
563	};
564
565	enum {
566	FD_CMD_READ_TRACK = 0x02,
567	FD_CMD_SPECIFY = 0x03,
568	FD_CMD_SENSE_DRIVE_STATUS = 0x04,
569	FD_CMD_WRITE = 0x05,
570	FD_CMD_READ = 0x06,
571	FD_CMD_RECALIBRATE = 0x07,
572	FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
573	FD_CMD_WRITE_DELETED = 0x09,
574	FD_CMD_READ_ID = 0x0a,
575	FD_CMD_READ_DELETED = 0x0c,
576	FD_CMD_FORMAT_TRACK = 0x0d,
577	FD_CMD_DUMPREG = 0x0e,
578	FD_CMD_SEEK = 0x0f,
579	FD_CMD_VERSION = 0x10,
580	FD_CMD_SCAN_EQUAL = 0x11,
581	FD_CMD_PERPENDICULAR_MODE = 0x12,
582	FD_CMD_CONFIGURE = 0x13,
583	FD_CMD_LOCK = 0x14,
584	FD_CMD_VERIFY = 0x16,
585	FD_CMD_POWERDOWN_MODE = 0x17,
586	FD_CMD_PART_ID = 0x18,
587	FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
588	FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
589	FD_CMD_SAVE = 0x2e,
590	FD_CMD_OPTION = 0x33,
591	FD_CMD_RESTORE = 0x4e,
592	FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
593	FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
594	FD_CMD_FORMAT_AND_WRITE = 0xcd,
595	FD_CMD_RELATIVE_SEEK_IN = 0xcf
596	};
597
598	enum {
599	FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
600	FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
601	FD_CONFIG_POLL = 0x10, /* Poll enabled */
602	FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
603	FD_CONFIG_EIS = 0x40 /* No implied seeks */
604	};
605
606	enum {
607	FD_SR0_EQPMT = 0x10,
608	FD_SR0_SEEK = 0x20,
609	FD_SR0_ABNTERM = 0x40,
610	FD_SR0_INVCMD = 0x80,
611	FD_SR0_RDYCHG = 0xc0
612	};
613
614	enum {
615	FD_SR1_MA = 0x01, /* Missing address mark */
616	FD_SR1_NW = 0x02, /* Not writable */
617	FD_SR1_ND = 0x04, /* No data */
618	FD_SR1_EC = 0x80 /* End of cylinder */
619	};
620
621	enum {
622	FD_SR2_MD = 0x01, /* Missing data address mark */
623	FD_SR2_SNS = 0x04, /* Scan not satisfied */
624	FD_SR2_SEH = 0x08 /* Scan equal hit */
625	};
626
627	enum {
628	FD_SRA_DIR = 0x01,
629	FD_SRA_nWP = 0x02,
630	FD_SRA_nINDX = 0x04,
631	FD_SRA_HDSEL = 0x08,
632	FD_SRA_nTRK0 = 0x10,
633	FD_SRA_STEP = 0x20,
634	FD_SRA_nDRV2 = 0x40,
635	FD_SRA_INTPEND = 0x80
636	};
637
638	enum {
639	FD_SRB_MTR0 = 0x01,
640	FD_SRB_MTR1 = 0x02,
641	FD_SRB_WGATE = 0x04,
642	FD_SRB_RDATA = 0x08,
643	FD_SRB_WDATA = 0x10,
644	FD_SRB_DR0 = 0x20
645	};
646
647	enum {
648	#if MAX_FD == 4
649	FD_DOR_SELMASK = 0x03,
650	#else
651	FD_DOR_SELMASK = 0x01,
652	#endif
653	FD_DOR_nRESET = 0x04,
654	FD_DOR_DMAEN = 0x08,
655	FD_DOR_MOTEN0 = 0x10,
656	FD_DOR_MOTEN1 = 0x20,
657	FD_DOR_MOTEN2 = 0x40,
658	FD_DOR_MOTEN3 = 0x80
659	};
660
661	enum {
662	#if MAX_FD == 4
663	FD_TDR_BOOTSEL = 0x0c
664	#else
665	FD_TDR_BOOTSEL = 0x04
666	#endif
667	};
668
669	enum {
670	FD_DSR_DRATEMASK= 0x03,
671	FD_DSR_PWRDOWN = 0x40,
672	FD_DSR_SWRESET = 0x80
673	};
674
675	enum {
676	FD_MSR_DRV0BUSY = 0x01,
677	FD_MSR_DRV1BUSY = 0x02,
678	FD_MSR_DRV2BUSY = 0x04,
679	FD_MSR_DRV3BUSY = 0x08,
680	FD_MSR_CMDBUSY = 0x10,
681	FD_MSR_NONDMA = 0x20,
682	FD_MSR_DIO = 0x40,
683	FD_MSR_RQM = 0x80
684	};
685
686	enum {
687	FD_DIR_DSKCHG = 0x80
688	};
689
690	#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
691	#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
692	#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
693
694	#ifdef VBOX
695	/**
696	* Floppy controller state.
697	*
698	* @implements PDMILEDPORTS
699	*/
700	#endif
701	struct fdctrl_t {
702	#ifndef VBOX
703	fdctrl_t *fdctrl;
704	#endif
705	/* Controller's identification */
706	uint8_t version;
707	/* HW */
708	#ifndef VBOX
709	int irq;
710	int dma_chann;
711	#else
712	uint8_t irq_lvl;
713	uint8_t dma_chann;
714	#endif
715	uint32_t io_base;
716	/* Controller state */
717	#ifndef VBOX
718	QEMUTimer *result_timer;
719	#else
720	struct TMTIMER *result_timer;
721	#endif
722	uint8_t sra;
723	uint8_t srb;
724	uint8_t dor;
725	uint8_t tdr;
726	uint8_t dsr;
727	uint8_t msr;
728	uint8_t cur_drv;
729	uint8_t status0;
730	uint8_t status1;
731	uint8_t status2;
732	/* Command FIFO */
733	uint8_t fifo[FD_SECTOR_LEN];
734	uint32_t data_pos;
735	uint32_t data_len;
736	uint8_t data_state;
737	uint8_t data_dir;
738	uint8_t eot; /* last wanted sector */
739	/* States kept only to be returned back */
740	/* Timers state */
741	uint8_t timer0;
742	uint8_t timer1;
743	/* precompensation */
744	uint8_t precomp_trk;
745	uint8_t config;
746	uint8_t lock;
747	/* Power down config (also with status regB access mode */
748	uint8_t pwrd;
749	/* Floppy drives */
750	uint8_t num_floppies;
751	fdrive_t drives[MAX_FD];
752	uint8_t reset_sensei;
753	#ifdef VBOX
754	/** Pointer to device instance. */
755	PPDMDEVINS pDevIns;
756
757	/** Status LUN: The base interface. */
758	PDMIBASE IBaseStatus;
759	/** Status LUN: The Leds interface. */
760	PDMILEDPORTS ILeds;
761	/** Status LUN: The Partner of ILeds. */
762	PPDMILEDCONNECTORS pLedsConnector;
763	#endif
764	};
765
766	static uint32_t fdctrl_read (void *opaque, uint32_t reg)
767	{
768	fdctrl_t fdctrl = (fdctrl_t )opaque;
769	uint32_t retval;
770
771	switch (reg) {
772	case FD_REG_SRA:
773	retval = fdctrl_read_statusA(fdctrl);
774	break;
775	case FD_REG_SRB:
776	retval = fdctrl_read_statusB(fdctrl);
777	break;
778	case FD_REG_DOR:
779	retval = fdctrl_read_dor(fdctrl);
780	break;
781	case FD_REG_TDR:
782	retval = fdctrl_read_tape(fdctrl);
783	break;
784	case FD_REG_MSR:
785	retval = fdctrl_read_main_status(fdctrl);
786	break;
787	case FD_REG_FIFO:
788	retval = fdctrl_read_data(fdctrl);
789	break;
790	case FD_REG_DIR:
791	retval = fdctrl_read_dir(fdctrl);
792	break;
793	default:
794	retval = (uint32_t)(-1);
795	break;
796	}
797	FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
798
799	return retval;
800	}
801
802	static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
803	{
804	fdctrl_t fdctrl = (fdctrl_t )opaque;
805
806	FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
807
808	switch (reg) {
809	case FD_REG_DOR:
810	fdctrl_write_dor(fdctrl, value);
811	break;
812	case FD_REG_TDR:
813	fdctrl_write_tape(fdctrl, value);
814	break;
815	case FD_REG_DSR:
816	fdctrl_write_rate(fdctrl, value);
817	break;
818	case FD_REG_FIFO:
819	fdctrl_write_data(fdctrl, value);
820	break;
821	case FD_REG_CCR:
822	fdctrl_write_ccr(fdctrl, value);
823	break;
824	default:
825	break;
826	}
827	}
828
829	/* Change IRQ state */
830	static void fdctrl_reset_irq(fdctrl_t *fdctrl)
831	{
832	if (!(fdctrl->sra & FD_SRA_INTPEND))
833	return;
834	FLOPPY_DPRINTF("Reset interrupt\n");
835	#ifdef VBOX
836	PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 0);
837	#else
838	qemu_set_irq(fdctrl->irq, 0);
839	#endif
840	fdctrl->sra &= ~FD_SRA_INTPEND;
841	}
842
843	static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0)
844	{
845	if (!(fdctrl->sra & FD_SRA_INTPEND)) {
846	FLOPPY_DPRINTF("Raising interrupt...\n");
847	#ifdef VBOX
848	PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 1);
849	#else
850	qemu_set_irq(fdctrl->irq, 1);
851	#endif
852	fdctrl->sra \|= FD_SRA_INTPEND;
853	}
854	if (status0 & FD_SR0_SEEK) {
855	fdrive_t *cur_drv;
856
857	/* A seek clears the disk change line (if a disk is inserted). */
858	cur_drv = get_cur_drv(fdctrl);
859	if (cur_drv->max_track)
860	cur_drv->dsk_chg = false;
861	}
862
863	fdctrl->reset_sensei = 0;
864	fdctrl->status0 = status0;
865	FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
866	}
867
868	/* Reset controller */
869	static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq)
870	{
871	int i;
872
873	FLOPPY_DPRINTF("reset controller\n");
874	fdctrl_reset_irq(fdctrl);
875	/* Initialise controller */
876	fdctrl->sra = 0;
877	fdctrl->srb = 0xc0;
878	#ifdef VBOX
879	if (!fdctrl->drives[1].pDrvMedia)
880	#else
881	if (!fdctrl->drives[1].bs)
882	#endif
883	fdctrl->sra \|= FD_SRA_nDRV2;
884	fdctrl->cur_drv = 0;
885	fdctrl->dor = FD_DOR_nRESET;
886	fdctrl->dor \|= (fdctrl->dma_chann != 0xff) ? FD_DOR_DMAEN : 0;
887	fdctrl->msr = FD_MSR_RQM;
888	/* FIFO state */
889	fdctrl->data_pos = 0;
890	fdctrl->data_len = 0;
891	fdctrl->data_state = 0;
892	fdctrl->data_dir = FD_DIR_WRITE;
893	for (i = 0; i < MAX_FD; i++)
894	fd_recalibrate(&fdctrl->drives[i]);
895	fdctrl_reset_fifo(fdctrl);
896	if (do_irq) {
897	fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
898	fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
899	}
900	}
901
902	static inline fdrive_t drv0(fdctrl_t fdctrl)
903	{
904	return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
905	}
906
907	static inline fdrive_t drv1(fdctrl_t fdctrl)
908	{
909	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
910	return &fdctrl->drives[1];
911	else
912	return &fdctrl->drives[0];
913	}
914
915	#if MAX_FD == 4
916	static inline fdrive_t drv2(fdctrl_t fdctrl)
917	{
918	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
919	return &fdctrl->drives[2];
920	else
921	return &fdctrl->drives[1];
922	}
923
924	static inline fdrive_t drv3(fdctrl_t fdctrl)
925	{
926	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
927	return &fdctrl->drives[3];
928	else
929	return &fdctrl->drives[2];
930	}
931	#endif
932
933	static fdrive_t get_cur_drv(fdctrl_t fdctrl)
934	{
935	switch (fdctrl->cur_drv) {
936	case 0: return drv0(fdctrl);
937	case 1: return drv1(fdctrl);
938	#if MAX_FD == 4
939	case 2: return drv2(fdctrl);
940	case 3: return drv3(fdctrl);
941	#endif
942	default: return NULL;
943	}
944	}
945
946	/* Status A register : 0x00 (read-only) */
947	static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl)
948	{
949	uint32_t retval = fdctrl->sra;
950
951	FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
952
953	return retval;
954	}
955
956	/* Status B register : 0x01 (read-only) */
957	static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl)
958	{
959	uint32_t retval = fdctrl->srb;
960
961	FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
962
963	return retval;
964	}
965
966	/* Digital output register : 0x02 */
967	static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl)
968	{
969	uint32_t retval = fdctrl->dor;
970
971	/* Selected drive */
972	retval \|= fdctrl->cur_drv;
973	FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
974
975	return retval;
976	}
977
978	static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value)
979	{
980	FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
981
982	/* Motors */
983	if (value & FD_DOR_MOTEN0)
984	fdctrl->srb \|= FD_SRB_MTR0;
985	else
986	fdctrl->srb &= ~FD_SRB_MTR0;
987	if (value & FD_DOR_MOTEN1)
988	fdctrl->srb \|= FD_SRB_MTR1;
989	else
990	fdctrl->srb &= ~FD_SRB_MTR1;
991
992	/* Drive */
993	if (value & 1)
994	fdctrl->srb \|= FD_SRB_DR0;
995	else
996	fdctrl->srb &= ~FD_SRB_DR0;
997
998	/* Reset */
999	if (!(value & FD_DOR_nRESET)) {
1000	if (fdctrl->dor & FD_DOR_nRESET) {
1001	FLOPPY_DPRINTF("controller enter RESET state\n");
1002	}
1003	} else {
1004	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1005	FLOPPY_DPRINTF("controller out of RESET state\n");
1006	fdctrl_reset(fdctrl, 1);
1007	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1008	}
1009	}
1010	/* Selected drive */
1011	fdctrl->cur_drv = value & FD_DOR_SELMASK;
1012
1013	fdctrl->dor = value;
1014	}
1015
1016	/* Tape drive register : 0x03 */
1017	static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl)
1018	{
1019	uint32_t retval = fdctrl->tdr;
1020
1021	FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
1022
1023	return retval;
1024	}
1025
1026	static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value)
1027	{
1028	/* Reset mode */
1029	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1030	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1031	return;
1032	}
1033	FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
1034	/* Disk boot selection indicator */
1035	fdctrl->tdr = value & FD_TDR_BOOTSEL;
1036	/* Tape indicators: never allow */
1037	}
1038
1039	/* Main status register : 0x04 (read) */
1040	static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl)
1041	{
1042	uint32_t retval = fdctrl->msr;
1043
1044	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1045	fdctrl->dor \|= FD_DOR_nRESET;
1046
1047	FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
1048
1049	return retval;
1050	}
1051
1052	/* Data select rate register : 0x04 (write) */
1053	static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value)
1054	{
1055	/* Reset mode */
1056	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1057	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1058	return;
1059	}
1060	FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
1061	/* Reset: autoclear */
1062	if (value & FD_DSR_SWRESET) {
1063	fdctrl->dor &= ~FD_DOR_nRESET;
1064	fdctrl_reset(fdctrl, 1);
1065	fdctrl->dor \|= FD_DOR_nRESET;
1066	}
1067	if (value & FD_DSR_PWRDOWN) {
1068	fdctrl_reset(fdctrl, 1);
1069	}
1070	fdctrl->dsr = value;
1071	}
1072
1073	/* Configuration control register : 0x07 (write) */
1074	static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value)
1075	{
1076	/* Reset mode */
1077	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1078	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1079	return;
1080	}
1081	FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
1082
1083	/* Only the rate selection bits used in AT mode, and we
1084	* store those in the DSR.
1085	*/
1086	fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) \| (value & FD_DSR_DRATEMASK);
1087	}
1088
1089	static int fdctrl_media_changed(fdrive_t *drv)
1090	{
1091	#ifdef VBOX
1092	return drv->dsk_chg;
1093	#else
1094	int ret;
1095
1096	if (!drv->bs)
1097	return 0;
1098	ret = bdrv_media_changed(drv->bs);
1099	if (ret) {
1100	fd_revalidate(drv);
1101	}
1102	return ret;
1103	#endif
1104	}
1105
1106	/* Digital input register : 0x07 (read-only) */
1107	static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl)
1108	{
1109	uint32_t retval = 0;
1110
1111	#ifdef VBOX
1112	/* The change line signal is reported by the currently selected
1113	* drive. If the corresponding motor on bit is not set, the drive
1114	* is not selected!
1115	*/
1116	if (fdctrl_media_changed(get_cur_drv(fdctrl))
1117	&& (fdctrl->dor & (0x10 << fdctrl->cur_drv)))
1118	#else
1119	if (fdctrl_media_changed(drv0(fdctrl))
1120	\|\| fdctrl_media_changed(drv1(fdctrl))
1121	#if MAX_FD == 4
1122	\|\| fdctrl_media_changed(drv2(fdctrl))
1123	\|\| fdctrl_media_changed(drv3(fdctrl))
1124	#endif
1125	)
1126	#endif
1127	retval \|= FD_DIR_DSKCHG;
1128	if (retval != 0)
1129	FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
1130
1131	return retval;
1132	}
1133
1134	/* FIFO state control */
1135	static void fdctrl_reset_fifo(fdctrl_t *fdctrl)
1136	{
1137	fdctrl->data_dir = FD_DIR_WRITE;
1138	fdctrl->data_pos = 0;
1139	fdctrl->msr &= ~(FD_MSR_CMDBUSY \| FD_MSR_DIO);
1140	}
1141
1142	/* Set FIFO status for the host to read */
1143	static void fdctrl_set_fifo(fdctrl_t *fdctrl, int fifo_len, int do_irq)
1144	{
1145	fdctrl->data_dir = FD_DIR_READ;
1146	fdctrl->data_len = fifo_len;
1147	fdctrl->data_pos = 0;
1148	fdctrl->msr \|= FD_MSR_CMDBUSY \| FD_MSR_RQM \| FD_MSR_DIO;
1149	if (do_irq)
1150	fdctrl_raise_irq(fdctrl, 0x00);
1151	}
1152
1153	/* Set an error: unimplemented/unknown command */
1154	static void fdctrl_unimplemented(fdctrl_t *fdctrl, int direction)
1155	{
1156	RT_NOREF(direction);
1157	FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
1158	fdctrl->fifo[0] = FD_SR0_INVCMD;
1159	fdctrl_set_fifo(fdctrl, 1, 0);
1160	}
1161
1162	/* Seek to next sector */
1163	static int fdctrl_seek_to_next_sect(fdctrl_t fdctrl, fdrive_t cur_drv)
1164	{
1165	FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
1166	cur_drv->head, cur_drv->track, cur_drv->sect,
1167	fd_sector(cur_drv));
1168	/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1169	error in fact */
1170	if (cur_drv->sect >= cur_drv->last_sect \|\|
1171	cur_drv->sect == fdctrl->eot) {
1172	cur_drv->sect = 1;
1173	if (FD_MULTI_TRACK(fdctrl->data_state)) {
1174	if (cur_drv->head == 0 &&
1175	(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1176	cur_drv->head = 1;
1177	} else {
1178	cur_drv->head = 0;
1179	cur_drv->ltrk++;
1180	if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1181	return 0;
1182	}
1183	} else {
1184	cur_drv->ltrk++;
1185	return 0;
1186	}
1187	FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1188	cur_drv->head, cur_drv->track,
1189	cur_drv->sect, fd_sector(cur_drv));
1190	} else {
1191	cur_drv->sect++;
1192	}
1193	return 1;
1194	}
1195
1196	/* Callback for transfer end (stop or abort) */
1197	static void fdctrl_stop_transfer(fdctrl_t *fdctrl, uint8_t status0,
1198	uint8_t status1, uint8_t status2)
1199	{
1200	fdrive_t *cur_drv;
1201
1202	cur_drv = get_cur_drv(fdctrl);
1203	FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
1204	status0, status1, status2,
1205	status0 \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl));
1206	fdctrl->fifo[0] = status0 \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl);
1207	fdctrl->fifo[1] = status1;
1208	fdctrl->fifo[2] = status2;
1209	fdctrl->fifo[3] = cur_drv->ltrk;
1210	fdctrl->fifo[4] = cur_drv->head;
1211	fdctrl->fifo[5] = cur_drv->sect;
1212	fdctrl->fifo[6] = FD_SECTOR_SC;
1213	FLOPPY_DPRINTF("ST0:%02x ST1:%02x ST2:%02x C:%02x H:%02x R:%02x N:%02x\n",
1214	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2], fdctrl->fifo[3],
1215	fdctrl->fifo[4], fdctrl->fifo[5], fdctrl->fifo[6]);
1216
1217	fdctrl->data_dir = FD_DIR_READ;
1218	if (!(fdctrl->msr & FD_MSR_NONDMA)) {
1219	#ifdef VBOX
1220	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 0);
1221	#else
1222	DMA_release_DREQ(fdctrl->dma_chann);
1223	#endif
1224	}
1225	fdctrl->msr \|= FD_MSR_RQM \| FD_MSR_DIO;
1226	fdctrl->msr &= ~FD_MSR_NONDMA;
1227	fdctrl_set_fifo(fdctrl, 7, 1);
1228	}
1229
1230	/* Prepare a data transfer (either DMA or FIFO) */
1231	static void fdctrl_start_transfer(fdctrl_t *fdctrl, int direction)
1232	{
1233	fdrive_t *cur_drv;
1234	uint8_t kh, kt, ks;
1235	int did_seek = 0;
1236
1237	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1238	cur_drv = get_cur_drv(fdctrl);
1239	kt = fdctrl->fifo[2];
1240	kh = fdctrl->fifo[3];
1241	ks = fdctrl->fifo[4];
1242	FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
1243	GET_CUR_DRV(fdctrl), kh, kt, ks,
1244	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1245	FLOPPY_DPRINTF("CMD:%02x SEL:%02x C:%02x H:%02x R:%02x N:%02x EOT:%02x GPL:%02x DTL:%02x\n",
1246	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
1247	fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5],
1248	fdctrl->fifo[6], fdctrl->fifo[7], fdctrl->fifo[8]);
1249	switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1250	case 2:
1251	/* sect too big */
1252	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1253	fdctrl->fifo[3] = kt;
1254	fdctrl->fifo[4] = kh;
1255	fdctrl->fifo[5] = ks;
1256	return;
1257	case 3:
1258	/* track too big */
1259	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1260	fdctrl->fifo[3] = kt;
1261	fdctrl->fifo[4] = kh;
1262	fdctrl->fifo[5] = ks;
1263	return;
1264	case 4:
1265	/* No seek enabled */
1266	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1267	fdctrl->fifo[3] = kt;
1268	fdctrl->fifo[4] = kh;
1269	fdctrl->fifo[5] = ks;
1270	return;
1271	case 5:
1272	/* No disk in drive */
1273	/// @todo This is wrong! Command should not complete.
1274	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| 0x08, /FD_SR1_MA \|/ FD_SR1_ND, 0x00);
1275	fdctrl->fifo[3] = kt;
1276	fdctrl->fifo[4] = kh;
1277	fdctrl->fifo[5] = ks;
1278	return;
1279	case 1:
1280	did_seek = 1;
1281	break;
1282	default:
1283	break;
1284	}
1285	/* Check the data rate. If the programmed data rate does not match
1286	* the currently inserted medium, the operation has to fail.
1287	*/
1288	#ifdef VBOX
1289	if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
1290	FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
1291	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
1292	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
1293	fdctrl->fifo[3] = kt;
1294	fdctrl->fifo[4] = kh;
1295	fdctrl->fifo[5] = ks;
1296	return;
1297	}
1298	#endif
1299	/* Set the FIFO state */
1300	fdctrl->data_dir = direction;
1301	fdctrl->data_pos = 0;
1302	fdctrl->msr \|= FD_MSR_CMDBUSY;
1303	if (fdctrl->fifo[0] & 0x80)
1304	fdctrl->data_state \|= FD_STATE_MULTI;
1305	else
1306	fdctrl->data_state &= ~FD_STATE_MULTI;
1307	if (did_seek)
1308	fdctrl->data_state \|= FD_STATE_SEEK;
1309	else
1310	fdctrl->data_state &= ~FD_STATE_SEEK;
1311	if (fdctrl->fifo[5] == 00) {
1312	fdctrl->data_len = fdctrl->fifo[8];
1313	} else {
1314	int tmp;
1315	fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1316	tmp = (fdctrl->fifo[6] - ks + 1);
1317	if (fdctrl->fifo[0] & 0x80)
1318	tmp += fdctrl->fifo[6];
1319	fdctrl->data_len *= tmp;
1320	}
1321	fdctrl->eot = fdctrl->fifo[6];
1322	if (fdctrl->dor & FD_DOR_DMAEN) {
1323	int dma_mode;
1324	/* DMA transfer are enabled. Check if DMA channel is well programmed */
1325	#ifndef VBOX
1326	dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1327	#else
1328	dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
1329	#endif
1330	dma_mode = (dma_mode >> 2) & 3;
1331	FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1332	dma_mode, direction,
1333	(128 << fdctrl->fifo[5]) *
1334	(cur_drv->last_sect - ks + 1), fdctrl->data_len);
1335	if (((direction == FD_DIR_SCANE \|\| direction == FD_DIR_SCANL \|\|
1336	direction == FD_DIR_SCANH) && dma_mode == 0) \|\|
1337	(direction == FD_DIR_WRITE && dma_mode == 2) \|\|
1338	(direction == FD_DIR_READ && (dma_mode == 1 \|\| dma_mode == 0))) {
1339	/* No access is allowed until DMA transfer has completed */
1340	fdctrl->msr &= ~FD_MSR_RQM;
1341	/* Now, we just have to wait for the DMA controller to
1342	* recall us...
1343	*/
1344	#ifndef VBOX
1345	DMA_hold_DREQ(fdctrl->dma_chann);
1346	DMA_schedule(fdctrl->dma_chann);
1347	#else
1348	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
1349	PDMDevHlpDMASchedule (fdctrl->pDevIns);
1350	#endif
1351	return;
1352	} else {
1353	FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1354	}
1355	}
1356	FLOPPY_DPRINTF("start non-DMA transfer\n");
1357	fdctrl->msr \|= FD_MSR_NONDMA;
1358	if (direction != FD_DIR_WRITE)
1359	fdctrl->msr \|= FD_MSR_DIO;
1360	/* IO based transfer: calculate len */
1361	fdctrl_raise_irq(fdctrl, 0x00);
1362
1363	return;
1364	}
1365
1366	/* Prepare a format data transfer (either DMA or FIFO) */
1367	static void fdctrl_start_format(fdctrl_t *fdctrl)
1368	{
1369	fdrive_t *cur_drv;
1370	uint8_t ns, dp, kh, kt, ks;
1371
1372	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1373	cur_drv = get_cur_drv(fdctrl);
1374	kt = cur_drv->track;
1375	kh = (fdctrl->fifo[1] & 0x04) >> 2;
1376	ns = fdctrl->fifo[3];
1377	dp = fdctrl->fifo[5];
1378	ks = 1;
1379	FLOPPY_DPRINTF("Start format at %d %d %02x, %d sect, pat %02x (%d)\n",
1380	GET_CUR_DRV(fdctrl), kh, kt, ns, dp,
1381	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1382	switch (fd_seek(cur_drv, kh, kt, ks, false)) {
1383	case 2:
1384	/* sect too big */
1385	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1386	fdctrl->fifo[3] = kt;
1387	fdctrl->fifo[4] = kh;
1388	fdctrl->fifo[5] = ks;
1389	return;
1390	case 3:
1391	/* track too big */
1392	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1393	fdctrl->fifo[3] = kt;
1394	fdctrl->fifo[4] = kh;
1395	fdctrl->fifo[5] = ks;
1396	return;
1397	case 4:
1398	/* No seek enabled */
1399	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1400	fdctrl->fifo[3] = kt;
1401	fdctrl->fifo[4] = kh;
1402	fdctrl->fifo[5] = ks;
1403	return;
1404	case 5:
1405	/* No disk in drive */
1406	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
1407	fdctrl->fifo[3] = kt;
1408	fdctrl->fifo[4] = kh;
1409	fdctrl->fifo[5] = ks;
1410	return;
1411	case 1:
1412	break;
1413	default:
1414	break;
1415	}
1416	/* It's not clear what should happen if the data rate does not match. */
1417	#if 0
1418	/* Check the data rate. If the programmed data rate does not match
1419	* the currently inserted medium, the operation has to fail.
1420	*/
1421	if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
1422	FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
1423	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
1424	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
1425	fdctrl->fifo[3] = kt;
1426	fdctrl->fifo[4] = kh;
1427	fdctrl->fifo[5] = ks;
1428	return;
1429	}
1430	#endif
1431	/* Set the FIFO state */
1432	fdctrl->data_dir = FD_DIR_FORMAT;
1433	fdctrl->data_pos = 0;
1434	fdctrl->msr \|= FD_MSR_CMDBUSY;
1435	fdctrl->data_state &= ~(FD_STATE_MULTI \| FD_STATE_SEEK);
1436	fdctrl->data_len = ns * 4;
1437	fdctrl->eot = ns;
1438	if (fdctrl->dor & FD_DOR_DMAEN) {
1439	int dma_mode;
1440	/* DMA transfer are enabled. Check if DMA channel is well programmed */
1441	#ifndef VBOX
1442	dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1443	#else
1444	dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
1445	#endif
1446	dma_mode = (dma_mode >> 2) & 3;
1447	FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1448	dma_mode, fdctrl->data_dir,
1449	(128 << fdctrl->fifo[2]) *
1450	(cur_drv->last_sect + 1), fdctrl->data_len);
1451	if (fdctrl->data_dir == FD_DIR_FORMAT && dma_mode == 2) {
1452	/* No access is allowed until DMA transfer has completed */
1453	fdctrl->msr &= ~FD_MSR_RQM;
1454	/* Now, we just have to wait for the DMA controller to
1455	* recall us...
1456	*/
1457	#ifndef VBOX
1458	DMA_hold_DREQ(fdctrl->dma_chann);
1459	DMA_schedule(fdctrl->dma_chann);
1460	#else
1461	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
1462	PDMDevHlpDMASchedule (fdctrl->pDevIns);
1463	#endif
1464	return;
1465	} else {
1466	FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, fdctrl->data_dir);
1467	}
1468	}
1469	FLOPPY_DPRINTF("start non-DMA format\n");
1470	fdctrl->msr \|= FD_MSR_NONDMA;
1471	/* IO based transfer: calculate len */
1472	fdctrl_raise_irq(fdctrl, 0x00);
1473
1474	return;
1475	}
1476
1477	/* Prepare a transfer of deleted data */
1478	static void fdctrl_start_transfer_del(fdctrl_t *fdctrl, int direction)
1479	{
1480	RT_NOREF(direction);
1481	FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
1482
1483	/* We don't handle deleted data,
1484	* so we don't return ANYTHING
1485	*/
1486	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1487	}
1488
1489	#ifdef VBOX
1490	/* Block driver read/write wrappers. */
1491
1492	static int blk_write(fdrive_t drv, int64_t sector_num, const uint8_t buf, int nb_sectors)
1493	{
1494	int rc;
1495
1496	drv->Led.Asserted.s.fWriting = drv->Led.Actual.s.fWriting = 1;
1497
1498	rc = drv->pDrvMedia->pfnWrite(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
1499	buf, nb_sectors * FD_SECTOR_LEN);
1500
1501	drv->Led.Actual.s.fWriting = 0;
1502	if (RT_FAILURE(rc))
1503	AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
1504
1505	return rc;
1506	}
1507
1508	static int blk_read(fdrive_t drv, int64_t sector_num, uint8_t buf, int nb_sectors)
1509	{
1510	int rc;
1511
1512	drv->Led.Asserted.s.fReading = drv->Led.Actual.s.fReading = 1;
1513
1514	rc = drv->pDrvMedia->pfnRead(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
1515	buf, nb_sectors * FD_SECTOR_LEN);
1516
1517	drv->Led.Actual.s.fReading = 0;
1518
1519	if (RT_FAILURE(rc))
1520	AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
1521
1522	return rc;
1523	}
1524
1525	#endif
1526
1527	/* handlers for DMA transfers */
1528	#ifdef VBOX
1529	static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
1530	void *opaque,
1531	unsigned nchan,
1532	uint32_t dma_pos,
1533	uint32_t dma_len)
1534	#else
1535	static int fdctrl_transfer_handler (void *opaque, int nchan,
1536	int dma_pos, int dma_len)
1537	#endif
1538	{
1539	RT_NOREF(pDevIns, dma_pos);
1540	fdctrl_t *fdctrl;
1541	fdrive_t *cur_drv;
1542	#ifdef VBOX
1543	int rc;
1544	uint32_t len = 0;
1545	uint32_t start_pos, rel_pos;
1546	#else
1547	int len, start_pos, rel_pos;
1548	#endif
1549	uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1550
1551	fdctrl = (fdctrl_t *)opaque;
1552	if (fdctrl->msr & FD_MSR_RQM) {
1553	FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1554	return 0;
1555	}
1556	cur_drv = get_cur_drv(fdctrl);
1557	if (fdctrl->data_dir == FD_DIR_SCANE \|\| fdctrl->data_dir == FD_DIR_SCANL \|\|
1558	fdctrl->data_dir == FD_DIR_SCANH)
1559	status2 = FD_SR2_SNS;
1560	if (dma_len > fdctrl->data_len)
1561	dma_len = fdctrl->data_len;
1562	#ifndef VBOX
1563	if (cur_drv->bs == NULL)
1564	#else /* !VBOX */
1565	if (cur_drv->pDrvMedia == NULL)
1566	#endif
1567	{
1568	if (fdctrl->data_dir == FD_DIR_WRITE)
1569	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1570	else
1571	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1572	Assert(len == 0);
1573	goto transfer_error;
1574	}
1575
1576	#ifdef VBOX
1577	if (cur_drv->ro)
1578	{
1579	if (fdctrl->data_dir == FD_DIR_WRITE \|\| fdctrl->data_dir == FD_DIR_FORMAT)
1580	{
1581	/* Handle readonly medium early, no need to do DMA, touch the
1582	* LED or attempt any writes. A real floppy doesn't attempt
1583	* to write to readonly media either. */
1584	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, FD_SR1_NW,
1585	0x00);
1586	Assert(len == 0);
1587	goto transfer_error;
1588	}
1589	}
1590	#endif
1591
1592
1593	rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1594	for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1595	len = dma_len - fdctrl->data_pos;
1596	if (len + rel_pos > FD_SECTOR_LEN)
1597	len = FD_SECTOR_LEN - rel_pos;
1598	FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1599	"(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1600	fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
1601	cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1602	fd_sector(cur_drv) * FD_SECTOR_LEN);
1603	if (fdctrl->data_dir != FD_DIR_FORMAT &&
1604	(fdctrl->data_dir != FD_DIR_WRITE \|\|
1605	len < FD_SECTOR_LEN \|\| rel_pos != 0)) {
1606	/* READ & SCAN commands and realign to a sector for WRITE */
1607	#ifdef VBOX
1608	rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1609	if (RT_FAILURE(rc))
1610	#else
1611	if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1612	fdctrl->fifo, 1) < 0)
1613	#endif
1614	{
1615	FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1616	fd_sector(cur_drv));
1617	/* Sure, image size is too small... */
1618	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1619	}
1620	}
1621	switch (fdctrl->data_dir) {
1622	case FD_DIR_READ:
1623	/* READ commands */
1624	#ifdef VBOX
1625	{
1626	uint32_t read;
1627	int rc2 = PDMDevHlpDMAWriteMemory(fdctrl->pDevIns, nchan,
1628	fdctrl->fifo + rel_pos,
1629	fdctrl->data_pos,
1630	len, &read);
1631	AssertMsgRC (rc2, ("DMAWriteMemory -> %Rrc\n", rc2));
1632	}
1633	#else
1634	DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1635	fdctrl->data_pos, len);
1636	#endif
1637	/* cpu_physical_memory_write(addr + fdctrl->data_pos, */
1638	/* fdctrl->fifo + rel_pos, len); */
1639	break;
1640	case FD_DIR_WRITE:
1641	/* WRITE commands */
1642	#ifdef VBOX
1643	{
1644	uint32_t written;
1645	int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
1646	fdctrl->fifo + rel_pos,
1647	fdctrl->data_pos,
1648	len, &written);
1649	AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
1650	}
1651
1652	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1653	if (RT_FAILURE(rc))
1654	#else
1655	DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1656	fdctrl->data_pos, len);
1657	if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1658	fdctrl->fifo, 1) < 0)
1659	#endif
1660	{
1661	FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
1662	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1663	goto transfer_error;
1664	}
1665	break;
1666	#ifdef VBOX
1667	case FD_DIR_FORMAT:
1668	/* FORMAT command */
1669	{
1670	uint8_t eot = fdctrl->fifo[3];
1671	uint8_t filler = fdctrl->fifo[5];
1672	uint32_t written;
1673	int sct;
1674	int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
1675	fdctrl->fifo + rel_pos,
1676	fdctrl->data_pos,
1677	len, &written);
1678	AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
1679
1680	/* Fill the entire track with desired data pattern. */
1681	FLOPPY_DPRINTF("formatting track: %d sectors, pattern %02x\n",
1682	eot, filler);
1683	memset(fdctrl->fifo, filler, FD_SECTOR_LEN);
1684	for (sct = 0; sct < eot; ++sct)
1685	{
1686	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1687	if (RT_FAILURE(rc))
1688	{
1689	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1690	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1691	goto transfer_error;
1692	}
1693	fdctrl_seek_to_next_sect(fdctrl, cur_drv);
1694	}
1695	}
1696	break;
1697	#endif
1698	default:
1699	/* SCAN commands */
1700	{
1701	uint8_t tmpbuf[FD_SECTOR_LEN];
1702	int ret;
1703	#ifdef VBOX
1704	uint32_t read;
1705	int rc2 = PDMDevHlpDMAReadMemory (fdctrl->pDevIns, nchan, tmpbuf,
1706	fdctrl->data_pos, len, &read);
1707	AssertMsg(RT_SUCCESS(rc2), ("DMAReadMemory -> %Rrc2\n", rc2)); NOREF(rc2);
1708	#else
1709	DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1710	#endif
1711	ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1712	if (ret == 0) {
1713	status2 = FD_SR2_SEH;
1714	goto end_transfer;
1715	}
1716	if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) \|\|
1717	(ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1718	status2 = 0x00;
1719	goto end_transfer;
1720	}
1721	}
1722	break;
1723	}
1724	fdctrl->data_pos += len;
1725	rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1726	if (rel_pos == 0) {
1727	/* Seek to next sector */
1728	if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
1729	break;
1730	}
1731	}
1732	end_transfer:
1733	len = fdctrl->data_pos - start_pos;
1734	FLOPPY_DPRINTF("end transfer %d %d %d\n",
1735	fdctrl->data_pos, len, fdctrl->data_len);
1736	if (fdctrl->data_dir == FD_DIR_SCANE \|\|
1737	fdctrl->data_dir == FD_DIR_SCANL \|\|
1738	fdctrl->data_dir == FD_DIR_SCANH)
1739	status2 = FD_SR2_SEH;
1740	if (FD_DID_SEEK(fdctrl->data_state))
1741	status0 \|= FD_SR0_SEEK;
1742	fdctrl->data_len -= len;
1743	fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1744	transfer_error:
1745
1746	return len;
1747	}
1748
1749	/* Data register : 0x05 */
1750	static uint32_t fdctrl_read_data(fdctrl_t *fdctrl)
1751	{
1752	fdrive_t *cur_drv;
1753	uint32_t retval = 0;
1754	unsigned pos;
1755	#ifdef VBOX
1756	int rc;
1757	#endif
1758
1759	cur_drv = get_cur_drv(fdctrl);
1760	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1761	if (!(fdctrl->msr & FD_MSR_RQM) \|\| !(fdctrl->msr & FD_MSR_DIO)) {
1762	FLOPPY_ERROR("controller not ready for reading\n");
1763	return 0;
1764	}
1765	pos = fdctrl->data_pos % FD_SECTOR_LEN;
1766	if (fdctrl->msr & FD_MSR_NONDMA) {
1767	if (pos == 0) {
1768	if (fdctrl->data_pos != 0)
1769	if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
1770	FLOPPY_DPRINTF("error seeking to next sector %d\n",
1771	fd_sector(cur_drv));
1772	return 0;
1773	}
1774	#ifdef VBOX
1775	rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1776	if (RT_FAILURE(rc))
1777	#else
1778	if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0)
1779	#endif
1780	{
1781	FLOPPY_DPRINTF("error getting sector %d\n",
1782	fd_sector(cur_drv));
1783	/* Sure, image size is too small... */
1784	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1785	}
1786	}
1787	}
1788	retval = fdctrl->fifo[pos];
1789	if (++fdctrl->data_pos == fdctrl->data_len) {
1790	fdctrl->data_pos = 0;
1791	/* Switch from transfer mode to status mode
1792	* then from status mode to command mode
1793	*/
1794	if (fdctrl->msr & FD_MSR_NONDMA) {
1795	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1796	} else {
1797	fdctrl_reset_fifo(fdctrl);
1798	fdctrl_reset_irq(fdctrl);
1799	}
1800	}
1801	FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1802
1803	return retval;
1804	}
1805
1806	static void fdctrl_format_sector(fdctrl_t *fdctrl)
1807	{
1808	fdrive_t *cur_drv;
1809	uint8_t kh, kt, ks;
1810	#ifdef VBOX
1811	int ok = 0, rc;
1812	#endif
1813
1814	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1815	cur_drv = get_cur_drv(fdctrl);
1816	kt = fdctrl->fifo[6];
1817	kh = fdctrl->fifo[7];
1818	ks = fdctrl->fifo[8];
1819	FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1820	GET_CUR_DRV(fdctrl), kh, kt, ks,
1821	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1822	switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1823	case 2:
1824	/* sect too big */
1825	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1826	fdctrl->fifo[3] = kt;
1827	fdctrl->fifo[4] = kh;
1828	fdctrl->fifo[5] = ks;
1829	return;
1830	case 3:
1831	/* track too big */
1832	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1833	fdctrl->fifo[3] = kt;
1834	fdctrl->fifo[4] = kh;
1835	fdctrl->fifo[5] = ks;
1836	return;
1837	case 4:
1838	/* No seek enabled */
1839	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1840	fdctrl->fifo[3] = kt;
1841	fdctrl->fifo[4] = kh;
1842	fdctrl->fifo[5] = ks;
1843	return;
1844	case 5:
1845	/* No disk in drive */
1846	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
1847	fdctrl->fifo[3] = kt;
1848	fdctrl->fifo[4] = kh;
1849	fdctrl->fifo[5] = ks;
1850	return;
1851	case 1:
1852	fdctrl->data_state \|= FD_STATE_SEEK;
1853	break;
1854	default:
1855	break;
1856	}
1857	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1858	#ifdef VBOX
1859	if (cur_drv->pDrvMedia) {
1860	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1861	if (RT_FAILURE (rc)) {
1862	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1863	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1864	} else {
1865	ok = 1;
1866	}
1867	}
1868	if (ok) {
1869	#else
1870	if (cur_drv->bs == NULL \|\|
1871	bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1872	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1873	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1874	} else {
1875	#endif
1876	if (cur_drv->sect == cur_drv->last_sect) {
1877	fdctrl->data_state &= ~FD_STATE_FORMAT;
1878	/* Last sector done */
1879	if (FD_DID_SEEK(fdctrl->data_state))
1880	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1881	else
1882	fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1883	} else {
1884	/* More to do */
1885	fdctrl->data_pos = 0;
1886	fdctrl->data_len = 4;
1887	}
1888	}
1889	}
1890
1891	static void fdctrl_handle_lock(fdctrl_t *fdctrl, int direction)
1892	{
1893	RT_NOREF(direction);
1894	fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
1895	fdctrl->fifo[0] = fdctrl->lock << 4;
1896	fdctrl_set_fifo(fdctrl, 1, 0);
1897	}
1898
1899	static void fdctrl_handle_dumpreg(fdctrl_t *fdctrl, int direction)
1900	{
1901	RT_NOREF(direction);
1902	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1903
1904	/* Drives position */
1905	fdctrl->fifo[0] = drv0(fdctrl)->track;
1906	fdctrl->fifo[1] = drv1(fdctrl)->track;
1907	#if MAX_FD == 4
1908	fdctrl->fifo[2] = drv2(fdctrl)->track;
1909	fdctrl->fifo[3] = drv3(fdctrl)->track;
1910	#else
1911	fdctrl->fifo[2] = 0;
1912	fdctrl->fifo[3] = 0;
1913	#endif
1914	/* timers */
1915	fdctrl->fifo[4] = fdctrl->timer0;
1916	fdctrl->fifo[5] = (fdctrl->timer1 << 1) \| (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
1917	fdctrl->fifo[6] = cur_drv->last_sect;
1918	fdctrl->fifo[7] = (fdctrl->lock << 7) \|
1919	(cur_drv->perpendicular << 2);
1920	fdctrl->fifo[8] = fdctrl->config;
1921	fdctrl->fifo[9] = fdctrl->precomp_trk;
1922	fdctrl_set_fifo(fdctrl, 10, 0);
1923	}
1924
1925	static void fdctrl_handle_version(fdctrl_t *fdctrl, int direction)
1926	{
1927	RT_NOREF(direction);
1928	/* Controller's version */
1929	fdctrl->fifo[0] = fdctrl->version;
1930	fdctrl_set_fifo(fdctrl, 1, 0);
1931	}
1932
1933	static void fdctrl_handle_partid(fdctrl_t *fdctrl, int direction)
1934	{
1935	RT_NOREF(direction);
1936	fdctrl->fifo[0] = 0x01; /* Stepping 1 */
1937	fdctrl_set_fifo(fdctrl, 1, 0);
1938	}
1939
1940	static void fdctrl_handle_restore(fdctrl_t *fdctrl, int direction)
1941	{
1942	RT_NOREF(direction);
1943	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1944
1945	/* Drives position */
1946	drv0(fdctrl)->track = fdctrl->fifo[3];
1947	drv1(fdctrl)->track = fdctrl->fifo[4];
1948	#if MAX_FD == 4
1949	drv2(fdctrl)->track = fdctrl->fifo[5];
1950	drv3(fdctrl)->track = fdctrl->fifo[6];
1951	#endif
1952	/* timers */
1953	fdctrl->timer0 = fdctrl->fifo[7];
1954	fdctrl->timer1 = fdctrl->fifo[8];
1955	cur_drv->last_sect = fdctrl->fifo[9];
1956	fdctrl->lock = fdctrl->fifo[10] >> 7;
1957	cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1958	fdctrl->config = fdctrl->fifo[11];
1959	fdctrl->precomp_trk = fdctrl->fifo[12];
1960	fdctrl->pwrd = fdctrl->fifo[13];
1961	fdctrl_reset_fifo(fdctrl);
1962	}
1963
1964	static void fdctrl_handle_save(fdctrl_t *fdctrl, int direction)
1965	{
1966	RT_NOREF(direction);
1967	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1968
1969	fdctrl->fifo[0] = 0;
1970	fdctrl->fifo[1] = 0;
1971	/* Drives position */
1972	fdctrl->fifo[2] = drv0(fdctrl)->track;
1973	fdctrl->fifo[3] = drv1(fdctrl)->track;
1974	#if MAX_FD == 4
1975	fdctrl->fifo[4] = drv2(fdctrl)->track;
1976	fdctrl->fifo[5] = drv3(fdctrl)->track;
1977	#else
1978	fdctrl->fifo[4] = 0;
1979	fdctrl->fifo[5] = 0;
1980	#endif
1981	/* timers */
1982	fdctrl->fifo[6] = fdctrl->timer0;
1983	fdctrl->fifo[7] = fdctrl->timer1;
1984	fdctrl->fifo[8] = cur_drv->last_sect;
1985	fdctrl->fifo[9] = (fdctrl->lock << 7) \|
1986	(cur_drv->perpendicular << 2);
1987	fdctrl->fifo[10] = fdctrl->config;
1988	fdctrl->fifo[11] = fdctrl->precomp_trk;
1989	fdctrl->fifo[12] = fdctrl->pwrd;
1990	fdctrl->fifo[13] = 0;
1991	fdctrl->fifo[14] = 0;
1992	fdctrl_set_fifo(fdctrl, 15, 0);
1993	}
1994
1995	static void fdctrl_handle_readid(fdctrl_t *fdctrl, int direction)
1996	{
1997	RT_NOREF(direction);
1998	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1999
2000	FLOPPY_DPRINTF("CMD:%02x SEL:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
2001
2002	fdctrl->msr &= ~FD_MSR_RQM;
2003	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2004	#ifdef VBOX
2005	TMTimerSetMillies(fdctrl->result_timer, 1000 / 50);
2006	#else
2007	qemu_mod_timer(fdctrl->result_timer,
2008	qemu_get_clock(vm_clock) + (get_ticks_per_sec() / 50));
2009	#endif
2010	}
2011
2012	static void fdctrl_handle_format_track(fdctrl_t *fdctrl, int direction)
2013	{
2014	RT_NOREF(direction);
2015	fdrive_t *cur_drv;
2016	uint8_t ns, dp;
2017
2018	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2019	cur_drv = get_cur_drv(fdctrl);
2020	fdctrl->data_state &= ~(FD_STATE_MULTI \| FD_STATE_SEEK);
2021	ns = fdctrl->fifo[3];
2022	dp = fdctrl->fifo[5];
2023
2024	FLOPPY_DPRINTF("Format track %d at %d, %d sectors, filler %02x\n",
2025	cur_drv->track, GET_CUR_DRV(fdctrl), ns, dp);
2026	FLOPPY_DPRINTF("CMD:%02x SEL:%02x N:%02x SC:%02x GPL:%02x D:%02x\n",
2027	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
2028	fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5]);
2029
2030	/* Since we cannot actually format anything, we have to make sure that
2031	* whatever new format the guest is trying to establish matches the
2032	* existing format of the medium.
2033	*/
2034	if (cur_drv->last_sect != ns \|\| fdctrl->fifo[2] != 2)
2035	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_NW, 0);
2036	else
2037	{
2038	cur_drv->bps = fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
2039	cur_drv->last_sect = ns;
2040
2041	fdctrl_start_format(fdctrl);
2042	}
2043	}
2044
2045	static void fdctrl_handle_specify(fdctrl_t *fdctrl, int direction)
2046	{
2047	RT_NOREF(direction);
2048	fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
2049	fdctrl->timer1 = fdctrl->fifo[2] >> 1;
2050	if (fdctrl->fifo[2] & 1)
2051	fdctrl->dor &= ~FD_DOR_DMAEN;
2052	else
2053	fdctrl->dor \|= FD_DOR_DMAEN;
2054	/* No result back */
2055	fdctrl_reset_fifo(fdctrl);
2056	}
2057
2058	static void fdctrl_handle_sense_drive_status(fdctrl_t *fdctrl, int direction)
2059	{
2060	RT_NOREF(direction);
2061	fdrive_t *cur_drv;
2062
2063	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2064	cur_drv = get_cur_drv(fdctrl);
2065	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2066	/* 1 Byte status back */
2067	fdctrl->fifo[0] = (cur_drv->ro << 6) \|
2068	(cur_drv->track == 0 ? 0x10 : 0x00) \|
2069	(cur_drv->head << 2) \|
2070	GET_CUR_DRV(fdctrl) \|
2071	0x28;
2072	fdctrl_set_fifo(fdctrl, 1, 0);
2073	}
2074
2075	static void fdctrl_handle_recalibrate(fdctrl_t *fdctrl, int direction)
2076	{
2077	RT_NOREF(direction);
2078	fdrive_t *cur_drv;
2079	uint8_t st0;
2080
2081	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2082	cur_drv = get_cur_drv(fdctrl);
2083	fd_recalibrate(cur_drv);
2084	fdctrl_reset_fifo(fdctrl);
2085	st0 = FD_SR0_SEEK \| GET_CUR_DRV(fdctrl);
2086	/* No drive means no TRK0 signal. */
2087	if (cur_drv->drive == FDRIVE_DRV_NONE)
2088	st0 \|= FD_SR0_ABNTERM \| FD_SR0_EQPMT;
2089	/* Raise Interrupt */
2090	fdctrl_raise_irq(fdctrl, st0);
2091	}
2092
2093	static void fdctrl_handle_sense_interrupt_status(fdctrl_t *fdctrl, int direction)
2094	{
2095	RT_NOREF(direction);
2096	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2097
2098	FLOPPY_DPRINTF("CMD:%02x\n", fdctrl->fifo[0]);
2099	if(fdctrl->reset_sensei > 0) {
2100	fdctrl->fifo[0] =
2101	FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
2102	fdctrl->reset_sensei--;
2103	} else {
2104	/* XXX: status0 handling is broken for read/write
2105	commands, so we do this hack. It should be suppressed
2106	ASAP */
2107	fdctrl->fifo[0] =
2108	FD_SR0_SEEK \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl);
2109	/* Hack to preserve SR0 on equipment check failures (no drive). */
2110	if (fdctrl->status0 & FD_SR0_EQPMT)
2111	fdctrl->fifo[0] = fdctrl->status0;
2112	}
2113
2114	fdctrl->fifo[1] = cur_drv->track;
2115	fdctrl_set_fifo(fdctrl, 2, 0);
2116	FLOPPY_DPRINTF("ST0:%02x PCN:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
2117	fdctrl->status0 = FD_SR0_RDYCHG;
2118	}
2119
2120	static void fdctrl_handle_seek(fdctrl_t *fdctrl, int direction)
2121	{
2122	RT_NOREF(direction);
2123	fdrive_t *cur_drv;
2124
2125	FLOPPY_DPRINTF("CMD:%02x SEL:%02x NCN:%02x\n", fdctrl->fifo[0],
2126	fdctrl->fifo[1], fdctrl->fifo[2]);
2127
2128	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2129	cur_drv = get_cur_drv(fdctrl);
2130	fdctrl_reset_fifo(fdctrl);
2131	#ifdef VBOX
2132	/* The seek command just sends step pulses to the drive and doesn't care if
2133	* there's a medium inserted or if it's banging the head against the drive.
2134	*/
2135	cur_drv->track = fdctrl->fifo[2];
2136	cur_drv->ltrk = cur_drv->track;
2137	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2138	/* Raise Interrupt */
2139	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK \| GET_CUR_DRV(fdctrl));
2140	#else
2141	if (fdctrl->fifo[2] > cur_drv->max_track) {
2142	fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK);
2143	} else {
2144	cur_drv->track = fdctrl->fifo[2];
2145	/* Raise Interrupt */
2146	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2147	}
2148	#endif
2149	}
2150
2151	static void fdctrl_handle_perpendicular_mode(fdctrl_t *fdctrl, int direction)
2152	{
2153	RT_NOREF(direction);
2154	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2155
2156	if (fdctrl->fifo[1] & 0x80)
2157	cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
2158	/* No result back */
2159	fdctrl_reset_fifo(fdctrl);
2160	}
2161
2162	static void fdctrl_handle_configure(fdctrl_t *fdctrl, int direction)
2163	{
2164	RT_NOREF(direction);
2165	fdctrl->config = fdctrl->fifo[2];
2166	fdctrl->precomp_trk = fdctrl->fifo[3];
2167	/* No result back */
2168	fdctrl_reset_fifo(fdctrl);
2169	}
2170
2171	static void fdctrl_handle_powerdown_mode(fdctrl_t *fdctrl, int direction)
2172	{
2173	RT_NOREF(direction);
2174	fdctrl->pwrd = fdctrl->fifo[1];
2175	fdctrl->fifo[0] = fdctrl->fifo[1];
2176	fdctrl_set_fifo(fdctrl, 1, 0);
2177	}
2178
2179	static void fdctrl_handle_option(fdctrl_t *fdctrl, int direction)
2180	{
2181	RT_NOREF(direction);
2182	/* No result back */
2183	fdctrl_reset_fifo(fdctrl);
2184	}
2185
2186	static void fdctrl_handle_drive_specification_command(fdctrl_t *fdctrl, int direction)
2187	{
2188	RT_NOREF(direction);
2189	/* fdrive_t cur_drv = get_cur_drv(fdctrl); - unused /
2190
2191	/* This command takes a variable number of parameters. It can be terminated
2192	* at any time if the high bit of a parameter is set. Once there are 6 bytes
2193	* in the FIFO (command + 5 parameter bytes), data_len/data_pos will be 7.
2194	*/
2195	if (fdctrl->data_len == 7 \|\| (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80)) {
2196
2197	/* Command parameters done */
2198	if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
2199	/* Data is echoed, but not stored! */
2200	fdctrl->fifo[0] = fdctrl->data_len > 2 ? fdctrl->fifo[1] : 0;
2201	fdctrl->fifo[1] = fdctrl->data_len > 3 ? fdctrl->fifo[2] : 0;
2202	fdctrl->fifo[2] = 0;
2203	fdctrl->fifo[3] = 0;
2204	fdctrl_set_fifo(fdctrl, 4, 0);
2205	} else {
2206	fdctrl_reset_fifo(fdctrl);
2207	}
2208	} else
2209	fdctrl->data_len++; /* Wait for another byte. */
2210	}
2211
2212	static void fdctrl_handle_relative_seek_out(fdctrl_t *fdctrl, int direction)
2213	{
2214	RT_NOREF(direction);
2215	fdrive_t *cur_drv;
2216
2217	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2218	cur_drv = get_cur_drv(fdctrl);
2219	if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
2220	cur_drv->track = cur_drv->max_track - 1;
2221	} else {
2222	cur_drv->track += fdctrl->fifo[2];
2223	}
2224	fdctrl_reset_fifo(fdctrl);
2225	/* Raise Interrupt */
2226	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2227	}
2228
2229	static void fdctrl_handle_relative_seek_in(fdctrl_t *fdctrl, int direction)
2230	{
2231	RT_NOREF(direction);
2232	fdrive_t *cur_drv;
2233
2234	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2235	cur_drv = get_cur_drv(fdctrl);
2236	if (fdctrl->fifo[2] > cur_drv->track) {
2237	cur_drv->track = 0;
2238	} else {
2239	cur_drv->track -= fdctrl->fifo[2];
2240	}
2241	fdctrl_reset_fifo(fdctrl);
2242	/* Raise Interrupt */
2243	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2244	}
2245
2246	static const struct {
2247	uint8_t value;
2248	uint8_t mask;
2249	const char* name;
2250	int parameters;
2251	void (handler)(fdctrl_t fdctrl, int direction);
2252	int direction;
2253	} handlers[] = {
2254	{ FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
2255	{ FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
2256	{ FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
2257	{ FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
2258	{ FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
2259	{ FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
2260	{ FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
2261	{ FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
2262	{ FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
2263	{ FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
2264	{ FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
2265	{ FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
2266	{ FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
2267	{ FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
2268	{ FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
2269	{ FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
2270	{ FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
2271	{ FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
2272	{ FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
2273	{ FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
2274	{ FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
2275	{ FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
2276	{ FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 1, fdctrl_handle_drive_specification_command },
2277	{ FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
2278	{ FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
2279	{ FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
2280	{ FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
2281	{ FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
2282	{ FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
2283	{ FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
2284	{ FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
2285	{ 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
2286	};
2287	/* Associate command to an index in the 'handlers' array */
2288	static uint8_t command_to_handler[256];
2289
2290	static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value)
2291	{
2292	fdrive_t *cur_drv;
2293	int pos;
2294
2295	cur_drv = get_cur_drv(fdctrl);
2296	/* Reset mode */
2297	if (!(fdctrl->dor & FD_DOR_nRESET)) {
2298	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
2299	return;
2300	}
2301	if (!(fdctrl->msr & FD_MSR_RQM) \|\| (fdctrl->msr & FD_MSR_DIO)) {
2302	FLOPPY_ERROR("controller not ready for writing\n");
2303	return;
2304	}
2305	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
2306	/* Is it write command time ? */
2307	if (fdctrl->msr & FD_MSR_NONDMA) {
2308	/* FIFO data write */
2309	pos = fdctrl->data_pos++;
2310	pos %= FD_SECTOR_LEN;
2311	fdctrl->fifo[pos] = value;
2312	if (pos == FD_SECTOR_LEN - 1 \|\|
2313	fdctrl->data_pos == fdctrl->data_len) {
2314	#ifdef VBOX
2315	blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
2316	#else
2317	bdrv_write(cur_drv->bs, fd_sector(cur_drv),
2318	fdctrl->fifo, 1);
2319	#endif
2320	}
2321	/* Switch from transfer mode to status mode
2322	* then from status mode to command mode
2323	*/
2324	if (fdctrl->data_pos == fdctrl->data_len)
2325	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
2326	return;
2327	}
2328	if (fdctrl->data_pos == 0) {
2329	/* Command */
2330	fdctrl_reset_irq(fdctrl); /* If pending from previous seek/recalibrate. */
2331	pos = command_to_handler[value & 0xff];
2332	FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
2333	fdctrl->data_len = handlers[pos].parameters + 1;
2334	fdctrl->msr \|= FD_MSR_CMDBUSY;
2335	}
2336
2337	FLOPPY_DPRINTF("%s: %02x\n", __FUNCTION__, value);
2338	fdctrl->fifo[fdctrl->data_pos++ % FD_SECTOR_LEN] = value;
2339	if (fdctrl->data_pos == fdctrl->data_len) {
2340	/* We now have all parameters
2341	* and will be able to treat the command
2342	*/
2343	if (fdctrl->data_state & FD_STATE_FORMAT) {
2344	fdctrl_format_sector(fdctrl);
2345	return;
2346	}
2347
2348	pos = command_to_handler[fdctrl->fifo[0] & 0xff];
2349	FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
2350	(*handlers[pos].handler)(fdctrl, handlers[pos].direction);
2351	}
2352	}
2353
2354	static void fdctrl_result_timer(void *opaque)
2355	{
2356	fdctrl_t fdctrl = (fdctrl_t )opaque;
2357	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2358
2359	/* Pretend we are spinning.
2360	* This is needed for Coherent, which uses READ ID to check for
2361	* sector interleaving.
2362	*/
2363	if (cur_drv->last_sect != 0) {
2364	cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
2365	}
2366	/* READ_ID can't automatically succeed! */
2367	#ifdef VBOX
2368	if (!cur_drv->max_track) {
2369	FLOPPY_DPRINTF("read id when no disk in drive\n");
2370	/// @todo This is wrong! Command should not complete.
2371	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2372	} else if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
2373	FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
2374	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
2375	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2376	} else if (cur_drv->track >= cur_drv->max_track) {
2377	FLOPPY_DPRINTF("read id past last track (%d >= %d)\n",
2378	cur_drv->track, cur_drv->max_track);
2379	cur_drv->ltrk = 0;
2380	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2381	}
2382	else
2383	#endif
2384	fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
2385	}
2386
2387
2388	#ifdef VBOX
2389
2390	/* -=-=-=-=-=-=-=-=- Timer Callback -=-=-=-=-=-=-=-=- */
2391
2392	/**
2393	* @callback_method_impl{FNTMTIMERDEV}
2394	*/
2395	static DECLCALLBACK(void) fdcTimerCallback(PPDMDEVINS pDevIns, PTMTIMER pTimer, void *pvUser)
2396	{
2397	RT_NOREF(pDevIns, pTimer);
2398	fdctrl_t fdctrl = (fdctrl_t )pvUser;
2399	fdctrl_result_timer(fdctrl);
2400	}
2401
2402
2403	/* -=-=-=-=-=-=-=-=- I/O Port Access Handlers -=-=-=-=-=-=-=-=- */
2404
2405	/**
2406	* @callback_method_impl{FNIOMIOPORTOUT}
2407	*/
2408	static DECLCALLBACK(int) fdcIoPortWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t u32, unsigned cb)
2409	{
2410	RT_NOREF(pDevIns);
2411	if (cb == 1)
2412	fdctrl_write (pvUser, Port & 7, u32);
2413	else
2414	AssertMsgFailed(("Port=%#x cb=%d u32=%#x\n", Port, cb, u32));
2415	return VINF_SUCCESS;
2416	}
2417
2418
2419	/**
2420	* @callback_method_impl{FNIOMIOPORTOUT}
2421	*/
2422	static DECLCALLBACK(int) fdcIoPortRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT Port, uint32_t pu32, unsigned cb)
2423	{
2424	RT_NOREF(pDevIns);
2425	if (cb == 1)
2426	{
2427	*pu32 = fdctrl_read (pvUser, Port & 7);
2428	return VINF_SUCCESS;
2429	}
2430	return VERR_IOM_IOPORT_UNUSED;
2431	}
2432
2433
2434	/* -=-=-=-=-=-=-=-=- Saved state -=-=-=-=-=-=-=-=- */
2435
2436	/**
2437	* @callback_method_impl{FNSSMDEVSAVEEXEC}
2438	*/
2439	static DECLCALLBACK(int) fdcSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
2440	{
2441	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2442	unsigned int i;
2443
2444	/* Save the FDC I/O registers... */
2445	SSMR3PutU8(pSSM, pThis->sra);
2446	SSMR3PutU8(pSSM, pThis->srb);
2447	SSMR3PutU8(pSSM, pThis->dor);
2448	SSMR3PutU8(pSSM, pThis->tdr);
2449	SSMR3PutU8(pSSM, pThis->dsr);
2450	SSMR3PutU8(pSSM, pThis->msr);
2451	/* ...the status registers... */
2452	SSMR3PutU8(pSSM, pThis->status0);
2453	SSMR3PutU8(pSSM, pThis->status1);
2454	SSMR3PutU8(pSSM, pThis->status2);
2455	/* ...the command FIFO... */
2456	SSMR3PutU32(pSSM, sizeof(pThis->fifo));
2457	SSMR3PutMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
2458	SSMR3PutU32(pSSM, pThis->data_pos);
2459	SSMR3PutU32(pSSM, pThis->data_len);
2460	SSMR3PutU8(pSSM, pThis->data_state);
2461	SSMR3PutU8(pSSM, pThis->data_dir);
2462	/* ...and miscellaneous internal FDC state. */
2463	SSMR3PutU8(pSSM, pThis->reset_sensei);
2464	SSMR3PutU8(pSSM, pThis->eot);
2465	SSMR3PutU8(pSSM, pThis->timer0);
2466	SSMR3PutU8(pSSM, pThis->timer1);
2467	SSMR3PutU8(pSSM, pThis->precomp_trk);
2468	SSMR3PutU8(pSSM, pThis->config);
2469	SSMR3PutU8(pSSM, pThis->lock);
2470	SSMR3PutU8(pSSM, pThis->pwrd);
2471	SSMR3PutU8(pSSM, pThis->version);
2472
2473	/* Save the number of drives and per-drive state. Note that the media
2474	* states will be updated in fd_revalidate() and need not be saved.
2475	*/
2476	SSMR3PutU8(pSSM, pThis->num_floppies);
2477	Assert(RT_ELEMENTS(pThis->drives) == pThis->num_floppies);
2478	for (i = 0; i < pThis->num_floppies; ++i)
2479	{
2480	fdrive_t *d = &pThis->drives[i];
2481
2482	SSMR3PutMem(pSSM, &d->Led, sizeof(d->Led));
2483	SSMR3PutU32(pSSM, d->drive);
2484	SSMR3PutU8(pSSM, d->dsk_chg);
2485	SSMR3PutU8(pSSM, d->perpendicular);
2486	SSMR3PutU8(pSSM, d->head);
2487	SSMR3PutU8(pSSM, d->track);
2488	SSMR3PutU8(pSSM, d->sect);
2489	}
2490	return TMR3TimerSave (pThis->result_timer, pSSM);
2491	}
2492
2493
2494	/**
2495	* @callback_method_impl{FNSSMDEVLOADEXEC}
2496	*/
2497	static DECLCALLBACK(int) fdcLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
2498	{
2499	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2500	unsigned int i;
2501	uint32_t val32;
2502	uint8_t val8;
2503
2504	if (uVersion > FDC_SAVESTATE_CURRENT)
2505	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
2506	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
2507
2508	/* The old saved state was significantly different. However, we can get
2509	* back most of the controller state and fix the rest by pretending the
2510	* disk in the drive (if any) has been replaced. At any rate there should
2511	* be no difficulty unless the state was saved during a floppy operation.
2512	*/
2513	if (uVersion == FDC_SAVESTATE_OLD)
2514	{
2515	/* First verify a few assumptions. */
2516	AssertMsgReturn(sizeof(pThis->fifo) == FD_SECTOR_LEN,
2517	("The size of FIFO in saved state doesn't match!\n"),
2518	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2519	AssertMsgReturn(RT_ELEMENTS(pThis->drives) == 2,
2520	("The number of drives in old saved state doesn't match!\n"),
2521	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2522	/* Now load the old state. */
2523	SSMR3GetU8(pSSM, &pThis->version);
2524	/* Toss IRQ level, DMA channel, I/O base, and state. */
2525	SSMR3GetU8(pSSM, &val8);
2526	SSMR3GetU8(pSSM, &val8);
2527	SSMR3GetU32(pSSM, &val32);
2528	SSMR3GetU8(pSSM, &val8);
2529	/* Translate dma_en. */
2530	SSMR3GetU8(pSSM, &val8);
2531	if (val8)
2532	pThis->dor \|= FD_DOR_DMAEN;
2533	SSMR3GetU8(pSSM, &pThis->cur_drv);
2534	/* Translate bootsel. */
2535	SSMR3GetU8(pSSM, &val8);
2536	pThis->tdr \|= val8 << 2;
2537	SSMR3GetMem(pSSM, &pThis->fifo, FD_SECTOR_LEN);
2538	SSMR3GetU32(pSSM, &pThis->data_pos);
2539	SSMR3GetU32(pSSM, &pThis->data_len);
2540	SSMR3GetU8(pSSM, &pThis->data_state);
2541	SSMR3GetU8(pSSM, &pThis->data_dir);
2542	SSMR3GetU8(pSSM, &pThis->status0);
2543	SSMR3GetU8(pSSM, &pThis->eot);
2544	SSMR3GetU8(pSSM, &pThis->timer0);
2545	SSMR3GetU8(pSSM, &pThis->timer1);
2546	SSMR3GetU8(pSSM, &pThis->precomp_trk);
2547	SSMR3GetU8(pSSM, &pThis->config);
2548	SSMR3GetU8(pSSM, &pThis->lock);
2549	SSMR3GetU8(pSSM, &pThis->pwrd);
2550
2551	for (i = 0; i < 2; ++i)
2552	{
2553	fdrive_t *d = &pThis->drives[i];
2554
2555	SSMR3GetMem (pSSM, &d->Led, sizeof (d->Led));
2556	SSMR3GetU32(pSSM, &val32);
2557	d->drive = (fdrive_type_t)val32;
2558	SSMR3GetU32(pSSM, &val32); /* Toss drflags */
2559	SSMR3GetU8(pSSM, &d->perpendicular);
2560	SSMR3GetU8(pSSM, &d->head);
2561	SSMR3GetU8(pSSM, &d->track);
2562	SSMR3GetU8(pSSM, &d->sect);
2563	SSMR3GetU8(pSSM, &val8); /* Toss dir, rw */
2564	SSMR3GetU8(pSSM, &val8);
2565	SSMR3GetU32(pSSM, &val32);
2566	d->flags = (fdrive_flags_t)val32;
2567	SSMR3GetU8(pSSM, &d->last_sect);
2568	SSMR3GetU8(pSSM, &d->max_track);
2569	SSMR3GetU16(pSSM, &d->bps);
2570	SSMR3GetU8(pSSM, &d->ro);
2571	}
2572	}
2573	else /* New state - straightforward. */
2574	{
2575	Assert(uVersion == FDC_SAVESTATE_CURRENT);
2576	/* Load the FDC I/O registers... */
2577	SSMR3GetU8(pSSM, &pThis->sra);
2578	SSMR3GetU8(pSSM, &pThis->srb);
2579	SSMR3GetU8(pSSM, &pThis->dor);
2580	SSMR3GetU8(pSSM, &pThis->tdr);
2581	SSMR3GetU8(pSSM, &pThis->dsr);
2582	SSMR3GetU8(pSSM, &pThis->msr);
2583	/* ...the status registers... */
2584	SSMR3GetU8(pSSM, &pThis->status0);
2585	SSMR3GetU8(pSSM, &pThis->status1);
2586	SSMR3GetU8(pSSM, &pThis->status2);
2587	/* ...the command FIFO, if the size matches... */
2588	SSMR3GetU32(pSSM, &val32);
2589	AssertMsgReturn(sizeof(pThis->fifo) == val32,
2590	("The size of FIFO in saved state doesn't match!\n"),
2591	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2592	SSMR3GetMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
2593	SSMR3GetU32(pSSM, &pThis->data_pos);
2594	SSMR3GetU32(pSSM, &pThis->data_len);
2595	SSMR3GetU8(pSSM, &pThis->data_state);
2596	SSMR3GetU8(pSSM, &pThis->data_dir);
2597	/* ...and miscellaneous internal FDC state. */
2598	SSMR3GetU8(pSSM, &pThis->reset_sensei);
2599	SSMR3GetU8(pSSM, &pThis->eot);
2600	SSMR3GetU8(pSSM, &pThis->timer0);
2601	SSMR3GetU8(pSSM, &pThis->timer1);
2602	SSMR3GetU8(pSSM, &pThis->precomp_trk);
2603	SSMR3GetU8(pSSM, &pThis->config);
2604	SSMR3GetU8(pSSM, &pThis->lock);
2605	SSMR3GetU8(pSSM, &pThis->pwrd);
2606	SSMR3GetU8(pSSM, &pThis->version);
2607
2608	/* Validate the number of drives. */
2609	SSMR3GetU8(pSSM, &pThis->num_floppies);
2610	AssertMsgReturn(RT_ELEMENTS(pThis->drives) == pThis->num_floppies,
2611	("The number of drives in saved state doesn't match!\n"),
2612	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2613
2614	/* Load the per-drive state. */
2615	for (i = 0; i < pThis->num_floppies; ++i)
2616	{
2617	fdrive_t *d = &pThis->drives[i];
2618
2619	SSMR3GetMem(pSSM, &d->Led, sizeof(d->Led));
2620	SSMR3GetU32(pSSM, &val32);
2621	d->drive = (fdrive_type_t)val32;
2622	SSMR3GetU8(pSSM, &d->dsk_chg);
2623	SSMR3GetU8(pSSM, &d->perpendicular);
2624	SSMR3GetU8(pSSM, &d->head);
2625	SSMR3GetU8(pSSM, &d->track);
2626	SSMR3GetU8(pSSM, &d->sect);
2627	}
2628	}
2629	return TMR3TimerLoad (pThis->result_timer, pSSM);
2630	}
2631
2632
2633	/* -=-=-=-=-=-=-=-=- Drive level interfaces -=-=-=-=-=-=-=-=- */
2634
2635	/**
2636	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnMountNotify}
2637	*/
2638	static DECLCALLBACK(void) fdMountNotify(PPDMIMOUNTNOTIFY pInterface)
2639	{
2640	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
2641	LogFlow(("fdMountNotify:\n"));
2642	fd_revalidate(pDrv);
2643	}
2644
2645
2646	/**
2647	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnUnmountNotify}
2648	*/
2649	static DECLCALLBACK(void) fdUnmountNotify(PPDMIMOUNTNOTIFY pInterface)
2650	{
2651	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
2652	LogFlow(("fdUnmountNotify:\n"));
2653	fd_revalidate(pDrv);
2654	}
2655
2656
2657	/**
2658	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2659	*/
2660	static DECLCALLBACK(void ) fdQueryInterface (PPDMIBASE pInterface, const char pszIID)
2661	{
2662	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IBase);
2663
2664	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrv->IBase);
2665	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAPORT, &pDrv->IPort);
2666	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUNTNOTIFY, &pDrv->IMountNotify);
2667	return NULL;
2668	}
2669
2670
2671	/* -=-=-=-=-=-=-=-=- Controller level interfaces -=-=-=-=-=-=-=-=- */
2672
2673	/**
2674	* @interface_method_impl{PDMILEDPORTS,pfnQueryStatusLed}
2675	*/
2676	static DECLCALLBACK(int) fdcStatusQueryStatusLed(PPDMILEDPORTS pInterface, unsigned iLUN, PPDMLED *ppLed)
2677	{
2678	fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, ILeds);
2679	if (iLUN < RT_ELEMENTS(pThis->drives)) {
2680	*ppLed = &pThis->drives[iLUN].Led;
2681	Assert ((*ppLed)->u32Magic == PDMLED_MAGIC);
2682	return VINF_SUCCESS;
2683	}
2684	return VERR_PDM_LUN_NOT_FOUND;
2685	}
2686
2687
2688	/**
2689	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2690	*/
2691	static DECLCALLBACK(void ) fdcStatusQueryInterface(PPDMIBASE pInterface, const char pszIID)
2692	{
2693	fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, IBaseStatus);
2694
2695	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThis->IBaseStatus);
2696	PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThis->ILeds);
2697	return NULL;
2698	}
2699
2700
2701	/**
2702	* Configure a drive.
2703	*
2704	* @returns VBox status code.
2705	* @param drv The drive in question.
2706	* @param pDevIns The driver instance.
2707	* @param fInit Set if we're at init time and can change the drive type.
2708	*/
2709	static int fdConfig(fdrive_t *drv, PPDMDEVINS pDevIns, bool fInit)
2710	{
2711	static const char * const s_apszDesc[] = {"Floppy Drive A:", "Floppy Drive B"};
2712	int rc;
2713
2714	/*
2715	* Reset the LED just to be on the safe side.
2716	*/
2717	Assert (RT_ELEMENTS(s_apszDesc) > drv->iLUN);
2718	Assert (drv->Led.u32Magic == PDMLED_MAGIC);
2719	drv->Led.Actual.u32 = 0;
2720	drv->Led.Asserted.u32 = 0;
2721
2722	/*
2723	* Try attach the block device and get the interfaces.
2724	*/
2725	rc = PDMDevHlpDriverAttach (pDevIns, drv->iLUN, &drv->IBase, &drv->pDrvBase, s_apszDesc[drv->iLUN]);
2726	if (RT_SUCCESS (rc)) {
2727	drv->pDrvMedia = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMEDIA);
2728	if (drv->pDrvMedia) {
2729	drv->pDrvMount = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMOUNT);
2730	if (drv->pDrvMount) {
2731	fd_init(drv, fInit);
2732	} else {
2733	AssertMsgFailed (("Configuration error: LUN#%d without mountable interface!\n", drv->iLUN));
2734	rc = VERR_PDM_MISSING_INTERFACE;
2735	}
2736
2737	} else {
2738	AssertMsgFailed (("Configuration error: LUN#%d hasn't a block interface!\n", drv->iLUN));
2739	rc = VERR_PDM_MISSING_INTERFACE;
2740	}
2741	} else {
2742	AssertMsg (rc == VERR_PDM_NO_ATTACHED_DRIVER,
2743	("Failed to attach LUN#%d. rc=%Rrc\n", drv->iLUN, rc));
2744	switch (rc) {
2745	case VERR_ACCESS_DENIED:
2746	/* Error already cached by DrvHostBase */
2747	break;
2748	case VERR_PDM_NO_ATTACHED_DRIVER:
2749	/* Legal on architectures without a floppy controller */
2750	break;
2751	default:
2752	rc = PDMDevHlpVMSetError (pDevIns, rc, RT_SRC_POS,
2753	N_ ("The floppy controller cannot attach to the floppy drive"));
2754	break;
2755	}
2756	}
2757
2758	if (RT_FAILURE (rc)) {
2759	drv->pDrvBase = NULL;
2760	drv->pDrvMedia = NULL;
2761	drv->pDrvMount = NULL;
2762	}
2763	LogFlow (("fdConfig: returns %Rrc\n", rc));
2764	return rc;
2765	}
2766
2767
2768	/**
2769	* @interface_method_impl{PDMDEVREG,pfnAttach}
2770	*
2771	* This is called when we change block driver for a floppy drive.
2772	*/
2773	static DECLCALLBACK(int) fdcAttach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
2774	{
2775	fdctrl_t fdctrl = PDMINS_2_DATA(pDevIns, fdctrl_t );
2776	fdrive_t *drv;
2777	int rc;
2778	LogFlow (("ideDetach: iLUN=%u\n", iLUN));
2779
2780	AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
2781	("The FDC device does not support hotplugging\n"),
2782	VERR_INVALID_PARAMETER);
2783
2784	/*
2785	* Validate.
2786	*/
2787	if (iLUN >= 2) {
2788	AssertMsgFailed (("Configuration error: cannot attach or detach any but the first two LUNs - iLUN=%u\n",
2789	iLUN));
2790	return VERR_PDM_DEVINS_NO_ATTACH;
2791	}
2792
2793	/*
2794	* Locate the drive and stuff.
2795	*/
2796	drv = &fdctrl->drives[iLUN];
2797
2798	/* the usual paranoia */
2799	AssertRelease (!drv->pDrvBase);
2800	AssertRelease (!drv->pDrvMedia);
2801	AssertRelease (!drv->pDrvMount);
2802
2803	rc = fdConfig (drv, pDevIns, false /fInit/);
2804	AssertMsg (rc != VERR_PDM_NO_ATTACHED_DRIVER,
2805	("Configuration error: failed to configure drive %d, rc=%Rrc\n", iLUN, rc));
2806	if (RT_SUCCESS(rc)) {
2807	fd_revalidate (drv);
2808	}
2809
2810	LogFlow (("floppyAttach: returns %Rrc\n", rc));
2811	return rc;
2812	}
2813
2814
2815	/**
2816	* @interface_method_impl{PDMDEVREG,pfnDetach}
2817	*
2818	* The floppy drive has been temporarily 'unplugged'.
2819	*/
2820	static DECLCALLBACK(void) fdcDetach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
2821	{
2822	RT_NOREF(fFlags);
2823	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2824	LogFlow (("ideDetach: iLUN=%u\n", iLUN));
2825
2826	switch (iLUN)
2827	{
2828	case 0:
2829	case 1:
2830	{
2831	fdrive_t *drv = &pThis->drives[iLUN];
2832	drv->pDrvBase = NULL;
2833	drv->pDrvMedia = NULL;
2834	drv->pDrvMount = NULL;
2835	break;
2836	}
2837
2838	default:
2839	AssertMsgFailed(("Cannot detach LUN#%d!\n", iLUN));
2840	break;
2841	}
2842	}
2843
2844
2845	/**
2846	* @interface_method_impl{PDMDEVREG,pfnReset}
2847	*
2848	* I haven't check the specs on what's supposed to happen on reset, but we
2849	* should get any 'FATAL: floppy recal:f07 ctrl not ready' when resetting
2850	* at wrong time like we do if this was all void.
2851	*/
2852	static DECLCALLBACK(void) fdcReset(PPDMDEVINS pDevIns)
2853	{
2854	fdctrl_t pThis = PDMINS_2_DATA (pDevIns, fdctrl_t );
2855	unsigned i;
2856	LogFlow (("fdcReset:\n"));
2857
2858	fdctrl_reset(pThis, 0);
2859
2860	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
2861	fd_revalidate(&pThis->drives[i]);
2862	}
2863
2864
2865	/**
2866	* @interface_method_impl{PDMDEVREG,pfnConstruct}
2867	*/
2868	static DECLCALLBACK(int) fdcConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
2869	{
2870	RT_NOREF(iInstance);
2871	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2872	int rc;
2873	unsigned i, j;
2874	int ii;
2875	bool mem_mapped;
2876	uint16_t io_base;
2877	uint8_t irq_lvl, dma_chann;
2878	PPDMIBASE pBase;
2879
2880	Assert(iInstance == 0);
2881	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
2882
2883	/*
2884	* Validate configuration.
2885	*/
2886	if (!CFGMR3AreValuesValid(pCfg, "IRQ\0DMA\0MemMapped\0IOBase\0"))
2887	return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
2888
2889	/*
2890	* Read the configuration.
2891	*/
2892	rc = CFGMR3QueryU8Def(pCfg, "IRQ", &irq_lvl, 6);
2893	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 IRQ, rc=%Rrc\n", rc), rc);
2894
2895	rc = CFGMR3QueryU8Def(pCfg, "DMA", &dma_chann, 2);
2896	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 DMA, rc=%Rrc\n", rc), rc);
2897
2898	rc = CFGMR3QueryU16Def(pCfg, "IOBase", &io_base, 0x3f0);
2899	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U16 IOBase, rc=%Rrc\n", rc), rc);
2900
2901	rc = CFGMR3QueryBoolDef(pCfg, "MemMapped", &mem_mapped, false);
2902	AssertMsgRCReturn(rc, ("Configuration error: Failed to read bool value MemMapped rc=%Rrc\n", rc), rc);
2903
2904	/*
2905	* Initialize data.
2906	*/
2907	LogFlow(("fdcConstruct: irq_lvl=%d dma_chann=%d io_base=%#x\n", irq_lvl, dma_chann, io_base));
2908	pThis->pDevIns = pDevIns;
2909	pThis->version = 0x90; /* Intel 82078 controller */
2910	pThis->irq_lvl = irq_lvl;
2911	pThis->dma_chann = dma_chann;
2912	pThis->io_base = io_base;
2913	pThis->config = FD_CONFIG_EIS \| FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
2914	pThis->num_floppies = MAX_FD;
2915
2916	/* Fill 'command_to_handler' lookup table */
2917	for (ii = RT_ELEMENTS(handlers) - 1; ii >= 0; ii--)
2918	for (j = 0; j < sizeof(command_to_handler); j++)
2919	if ((j & handlers[ii].mask) == handlers[ii].value)
2920	command_to_handler[j] = ii;
2921
2922	pThis->IBaseStatus.pfnQueryInterface = fdcStatusQueryInterface;
2923	pThis->ILeds.pfnQueryStatusLed = fdcStatusQueryStatusLed;
2924
2925	for (i = 0; i < RT_ELEMENTS(pThis->drives); ++i)
2926	{
2927	fdrive_t *pDrv = &pThis->drives[i];
2928
2929	pDrv->drive = FDRIVE_DRV_NONE;
2930	pDrv->iLUN = i;
2931
2932	pDrv->IBase.pfnQueryInterface = fdQueryInterface;
2933	pDrv->IMountNotify.pfnMountNotify = fdMountNotify;
2934	pDrv->IMountNotify.pfnUnmountNotify = fdUnmountNotify;
2935	pDrv->Led.u32Magic = PDMLED_MAGIC;
2936	}
2937
2938	/*
2939	* Create the FDC timer.
2940	*/
2941	rc = PDMDevHlpTMTimerCreate(pDevIns, TMCLOCK_VIRTUAL, fdcTimerCallback, pThis,
2942	TMTIMER_FLAGS_DEFAULT_CRIT_SECT, "FDC Timer", &pThis->result_timer);
2943	if (RT_FAILURE(rc))
2944	return rc;
2945
2946	/*
2947	* Register DMA channel.
2948	*/
2949	if (pThis->dma_chann != 0xff)
2950	{
2951	rc = PDMDevHlpDMARegister(pDevIns, dma_chann, &fdctrl_transfer_handler, pThis);
2952	if (RT_FAILURE(rc))
2953	return rc;
2954	}
2955
2956	/*
2957	* IO / MMIO.
2958	*/
2959	if (mem_mapped)
2960	{
2961	AssertMsgFailed(("Memory mapped floppy not support by now\n"));
2962	return VERR_NOT_SUPPORTED;
2963	#if 0
2964	FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
2965	io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
2966	cpu_register_physical_memory(base, 0x08, io_mem);
2967	#endif
2968	}
2969	else
2970	{
2971	rc = PDMDevHlpIOPortRegister(pDevIns, io_base + 0x1, 5, pThis,
2972	fdcIoPortWrite, fdcIoPortRead, NULL, NULL, "FDC#1");
2973	if (RT_FAILURE(rc))
2974	return rc;
2975
2976	rc = PDMDevHlpIOPortRegister(pDevIns, io_base + 0x7, 1, pThis,
2977	fdcIoPortWrite, fdcIoPortRead, NULL, NULL, "FDC#2");
2978	if (RT_FAILURE(rc))
2979	return rc;
2980	}
2981
2982	/*
2983	* Register the saved state data unit.
2984	*/
2985	rc = PDMDevHlpSSMRegister(pDevIns, FDC_SAVESTATE_CURRENT, sizeof(*pThis), fdcSaveExec, fdcLoadExec);
2986	if (RT_FAILURE(rc))
2987	return rc;
2988
2989	/*
2990	* Attach the status port (optional).
2991	*/
2992	rc = PDMDevHlpDriverAttach(pDevIns, PDM_STATUS_LUN, &pThis->IBaseStatus, &pBase, "Status Port");
2993	if (RT_SUCCESS (rc))
2994	pThis->pLedsConnector = PDMIBASE_QUERY_INTERFACE(pBase, PDMILEDCONNECTORS);
2995	else if (rc != VERR_PDM_NO_ATTACHED_DRIVER)
2996	{
2997	AssertMsgFailed(("Failed to attach to status driver. rc=%Rrc\n", rc));
2998	return rc;
2999	}
3000
3001	/*
3002	* Initialize drives.
3003	*/
3004	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
3005	{
3006	fdrive_t *pDrv = &pThis->drives[i];
3007	rc = fdConfig(pDrv, pDevIns, true /fInit/);
3008	if ( RT_FAILURE(rc)
3009	&& rc != VERR_PDM_NO_ATTACHED_DRIVER)
3010	{
3011	AssertMsgFailed(("Configuration error: failed to configure drive %d, rc=%Rrc\n", i, rc));
3012	return rc;
3013	}
3014	}
3015
3016	fdctrl_reset(pThis, 0);
3017
3018	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
3019	fd_revalidate(&pThis->drives[i]);
3020
3021	return VINF_SUCCESS;
3022	}
3023
3024
3025	/**
3026	* The device registration structure.
3027	*/
3028	const PDMDEVREG g_DeviceFloppyController =
3029	{
3030	/* u32Version */
3031	PDM_DEVREG_VERSION,
3032	/* szName */
3033	"i82078",
3034	/* szRCMod */
3035	"",
3036	/* szR0Mod */
3037	"",
3038	/* pszDescription */
3039	"Floppy drive controller (Intel 82078)",
3040	/* fFlags */
3041	PDM_DEVREG_FLAGS_DEFAULT_BITS,
3042	/* fClass */
3043	PDM_DEVREG_CLASS_STORAGE,
3044	/* cMaxInstances */
3045	1,
3046	/* cbInstance */
3047	sizeof(fdctrl_t),
3048	/* pfnConstruct */
3049	fdcConstruct,
3050	/* pfnDestruct */
3051	NULL,
3052	/* pfnRelocate */
3053	NULL,
3054	/* pfnMemSetup */
3055	NULL,
3056	/* pfnPowerOn */
3057	NULL,
3058	/* pfnReset */
3059	fdcReset,
3060	/* pfnSuspend */
3061	NULL,
3062	/* pfnResume */
3063	NULL,
3064	/* pfnAttach */
3065	fdcAttach,
3066	/* pfnDetach */
3067	fdcDetach,
3068	/* pfnQueryInterface. */
3069	NULL,
3070	/* pfnInitComplete */
3071	NULL,
3072	/* pfnPowerOff */
3073	NULL,
3074	/* pfnSoftReset */
3075	NULL,
3076	/* u32VersionEnd */
3077	PDM_DEVREG_VERSION
3078	};
3079
3080	#endif /* VBOX */
3081
3082	/*
3083	* Local Variables:
3084	* mode: c
3085	* c-file-style: "k&r"
3086	* indent-tabs-mode: nil
3087	* End:
3088	*/
3089

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source: vbox/trunk/src/VBox/Devices/Storage/DevFdc.cpp@ 63942

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