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win32 port (initial patch by kazu)
[mirror_qemu.git] / hw / fdc.c
1 /*
2 * QEMU Floppy disk emulator
3 *
4 * Copyright (c) 2003 Jocelyn Mayer
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "vl.h"
25
26 /********************************************************/
27 /* debug Floppy devices */
28 //#define DEBUG_FLOPPY
29
30 #ifdef DEBUG_FLOPPY
31 #define FLOPPY_DPRINTF(fmt, args...) \
32 do { printf("FLOPPY: " fmt , ##args); } while (0)
33 #else
34 #define FLOPPY_DPRINTF(fmt, args...)
35 #endif
36
37 #define FLOPPY_ERROR(fmt, args...) \
38 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
39
40 /********************************************************/
41 /* Floppy drive emulation */
42
43 /* Will always be a fixed parameter for us */
44 #define FD_SECTOR_LEN 512
45 #define FD_SECTOR_SC 2 /* Sector size code */
46
47 /* Floppy disk drive emulation */
48 typedef enum fdisk_type_t {
49 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
50 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
51 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
52 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
53 FDRIVE_DISK_NONE = 0x05, /* No disk */
54 } fdisk_type_t;
55
56 typedef enum fdrive_type_t {
57 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
58 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
59 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
60 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
61 } fdrive_type_t;
62
63 typedef enum fdrive_flags_t {
64 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
65 FDRIVE_REVALIDATE = 0x02, /* Revalidated */
66 } fdrive_flags_t;
67
68 typedef enum fdisk_flags_t {
69 FDISK_DBL_SIDES = 0x01,
70 } fdisk_flags_t;
71
72 typedef struct fdrive_t {
73 BlockDriverState *bs;
74 /* Drive status */
75 fdrive_type_t drive;
76 fdrive_flags_t drflags;
77 uint8_t perpendicular; /* 2.88 MB access mode */
78 /* Position */
79 uint8_t head;
80 uint8_t track;
81 uint8_t sect;
82 /* Last operation status */
83 uint8_t dir; /* Direction */
84 uint8_t rw; /* Read/write */
85 /* Media */
86 fdisk_type_t disk; /* Disk type */
87 fdisk_flags_t flags;
88 uint8_t last_sect; /* Nb sector per track */
89 uint8_t max_track; /* Nb of tracks */
90 uint16_t bps; /* Bytes per sector */
91 uint8_t ro; /* Is read-only */
92 } fdrive_t;
93
94 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
95 {
96 /* Drive */
97 drv->bs = bs;
98 if (bs)
99 drv->drive = FDRIVE_DRV_144;
100 else
101 drv->drive = FDRIVE_DRV_NONE;
102 drv->drflags = 0;
103 drv->perpendicular = 0;
104 /* Disk */
105 drv->disk = FDRIVE_DISK_NONE;
106 drv->last_sect = 0;
107 drv->max_track = 0;
108 }
109
110 static int _fd_sector (uint8_t head, uint8_t track,
111 uint8_t sect, uint8_t last_sect)
112 {
113 return (((track * 2) + head) * last_sect) + sect - 1;
114 }
115
116 /* Returns current position, in sectors, for given drive */
117 static int fd_sector (fdrive_t *drv)
118 {
119 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
120 }
121
122 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
123 int enable_seek)
124 {
125 uint32_t sector;
126 int ret;
127
128 if (track > drv->max_track ||
129 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
130 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
131 head, track, sect, 1,
132 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
133 drv->max_track, drv->last_sect);
134 return 2;
135 }
136 if (sect > drv->last_sect) {
137 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
138 head, track, sect, 1,
139 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
140 drv->max_track, drv->last_sect);
141 return 3;
142 }
143 sector = _fd_sector(head, track, sect, drv->last_sect);
144 ret = 0;
145 if (sector != fd_sector(drv)) {
146 #if 0
147 if (!enable_seek) {
148 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
149 head, track, sect, 1, drv->max_track, drv->last_sect);
150 return 4;
151 }
152 #endif
153 drv->head = head;
154 if (drv->track != track)
155 ret = 1;
156 drv->track = track;
157 drv->sect = sect;
158 }
159
160 return ret;
161 }
162
163 /* Set drive back to track 0 */
164 static void fd_recalibrate (fdrive_t *drv)
165 {
166 FLOPPY_DPRINTF("recalibrate\n");
167 drv->head = 0;
168 drv->track = 0;
169 drv->sect = 1;
170 drv->dir = 1;
171 drv->rw = 0;
172 }
173
174 /* Revalidate a disk drive after a disk change */
175 static void fd_revalidate (fdrive_t *drv)
176 {
177 int64_t nb_sectors;
178 int nb_heads, max_track, last_sect, ro;
179
180 FLOPPY_DPRINTF("revalidate\n");
181 drv->drflags &= ~FDRIVE_REVALIDATE;
182
183 /* if no drive present, cannot do more */
184 if (!drv->bs)
185 return;
186
187 if (bdrv_is_inserted(drv->bs)) {
188 ro = bdrv_is_read_only(drv->bs);
189 bdrv_get_geometry_hint(drv->bs, &max_track, &nb_heads, &last_sect);
190 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
191 drv->disk = FDRIVE_DISK_USER;
192 printf("User defined disk (%d %d %d)",
193 nb_heads - 1, max_track, last_sect);
194 if (nb_heads == 1) {
195 drv->flags &= ~FDISK_DBL_SIDES;
196 } else {
197 drv->flags |= FDISK_DBL_SIDES;
198 }
199 drv->max_track = max_track;
200 drv->last_sect = last_sect;
201 } else {
202 bdrv_get_geometry(drv->bs, &nb_sectors);
203 switch (nb_sectors) {
204 /* 2.88 MB 3"1/2 drive disks */
205 case 7680:
206 printf("3.84 Mb 3\"1/2 disk (1 80 48)");
207 drv->drive = FDRIVE_DRV_288;
208 drv->disk = FDRIVE_DISK_288;
209 drv->last_sect = 48;
210 drv->max_track = 80;
211 drv->flags |= FDISK_DBL_SIDES;
212 break;
213 case 7040:
214 printf("3.52 Mb 3\"1/2 disk (1 80 44)");
215 drv->drive = FDRIVE_DRV_288;
216 drv->disk = FDRIVE_DISK_288;
217 drv->last_sect = 44;
218 drv->max_track = 80;
219 drv->flags |= FDISK_DBL_SIDES;
220 break;
221 case 6400:
222 printf("3.2 Mb 3\"1/2 disk (1 80 40)");
223 drv->drive = FDRIVE_DRV_288;
224 drv->disk = FDRIVE_DISK_288;
225 drv->last_sect = 40;
226 drv->max_track = 80;
227 drv->flags |= FDISK_DBL_SIDES;
228 break;
229 case 6240:
230 printf("3.12 Mb 3\"1/2 disk (1 80 39)");
231 drv->drive = FDRIVE_DRV_288;
232 drv->disk = FDRIVE_DISK_288;
233 drv->last_sect = 39;
234 drv->max_track = 80;
235 drv->flags |= FDISK_DBL_SIDES;
236 break;
237 case 5760:
238 printf("2.88 Mb 3\"1/2 disk (1 80 36)");
239 drv->drive = FDRIVE_DRV_288;
240 drv->disk = FDRIVE_DISK_288;
241 drv->last_sect = 36;
242 drv->max_track = 80;
243 drv->flags |= FDISK_DBL_SIDES;
244 break;
245
246 /* 1.44 MB 3"1/2 drive disks */
247 case 3840:
248 printf("1.92 Mb 3\"1/2 disk (1 80 24)");
249 drv->drive = FDRIVE_DRV_144;
250 drv->disk = FDRIVE_DISK_144;
251 drv->last_sect = 24;
252 drv->max_track = 80;
253 drv->flags |= FDISK_DBL_SIDES;
254 break;
255 case 3680:
256 printf("1.84 Mb 3\"1/2 disk (1 80 23)");
257 drv->drive = FDRIVE_DRV_144;
258 drv->disk = FDRIVE_DISK_144;
259 drv->last_sect = 23;
260 drv->max_track = 80;
261 drv->flags |= FDISK_DBL_SIDES;
262 break;
263 case 3520:
264 printf("1.76 Mb 3\"1/2 disk (1 80 22)");
265 drv->drive = FDRIVE_DRV_144;
266 drv->disk = FDRIVE_DISK_144;
267 drv->last_sect = 22;
268 drv->max_track = 80;
269 drv->flags |= FDISK_DBL_SIDES;
270 break;
271 case 3486:
272 printf("1.74 Mb 3\"1/2 disk (1 83 21)");
273 drv->drive = FDRIVE_DRV_144;
274 drv->disk = FDRIVE_DISK_144;
275 drv->last_sect = 21;
276 drv->max_track = 83;
277 drv->flags |= FDISK_DBL_SIDES;
278 break;
279 case 3444:
280 printf("1.72 Mb 3\"1/2 disk (1 82 21)");
281 drv->drive = FDRIVE_DRV_144;
282 drv->disk = FDRIVE_DISK_144;
283 drv->last_sect = 21;
284 drv->max_track = 82;
285 drv->flags |= FDISK_DBL_SIDES;
286 break;
287 case 3360:
288 printf("1.68 Mb 3\"1/2 disk (1 80 21)");
289 drv->drive = FDRIVE_DRV_144;
290 drv->disk = FDRIVE_DISK_144;
291 drv->last_sect = 21;
292 drv->max_track = 80;
293 drv->flags |= FDISK_DBL_SIDES;
294 break;
295 case 3200:
296 printf("1.6 Mb 3\"1/2 disk (1 80 20)");
297 drv->drive = FDRIVE_DRV_144;
298 drv->disk = FDRIVE_DISK_144;
299 drv->last_sect = 20;
300 drv->max_track = 80;
301 drv->flags |= FDISK_DBL_SIDES;
302 break;
303 case 2880:
304 default:
305 printf("1.44 Mb 3\"1/2 disk (1 80 18)");
306 drv->drive = FDRIVE_DRV_144;
307 drv->disk = FDRIVE_DISK_144;
308 drv->last_sect = 18;
309 drv->max_track = 80;
310 drv->flags |= FDISK_DBL_SIDES;
311 break;
312
313 /* 720 kB 3"1/2 drive disks */
314 case 2240:
315 printf("1.12 Mb 3\"1/2 disk (1 80 14)");
316 drv->drive = FDRIVE_DRV_144;
317 drv->disk = FDRIVE_DISK_720;
318 drv->last_sect = 14;
319 drv->max_track = 80;
320 drv->flags |= FDISK_DBL_SIDES;
321 break;
322 case 2080:
323 printf("1.04 Mb 3\"1/2 disk (1 80 13)");
324 drv->drive = FDRIVE_DRV_144;
325 drv->disk = FDRIVE_DISK_720;
326 drv->last_sect = 13;
327 drv->max_track = 80;
328 drv->flags |= FDISK_DBL_SIDES;
329 break;
330 case 1660:
331 printf("830 kb 3\"1/2 disk (1 83 10)");
332 drv->drive = FDRIVE_DRV_144;
333 drv->disk = FDRIVE_DISK_720;
334 drv->last_sect = 10;
335 drv->max_track = 83;
336 drv->flags |= FDISK_DBL_SIDES;
337 break;
338 case 1640:
339 printf("820 kb 3\"1/2 disk (1 82 10)");
340 drv->drive = FDRIVE_DRV_144;
341 drv->disk = FDRIVE_DISK_720;
342 drv->last_sect = 10;
343 drv->max_track = 82;
344 drv->flags |= FDISK_DBL_SIDES;
345 break;
346 case 1600:
347 printf("800 kb 3\"1/2 disk (1 80 10)");
348 drv->drive = FDRIVE_DRV_144;
349 drv->disk = FDRIVE_DISK_720;
350 drv->last_sect = 10;
351 drv->max_track = 80;
352 drv->flags |= FDISK_DBL_SIDES;
353 break;
354 case 1440:
355 printf("720 kb 3\"1/2 disk (1 80 9)");
356 drv->drive = FDRIVE_DRV_144;
357 drv->disk = FDRIVE_DISK_720;
358 drv->last_sect = 9;
359 drv->max_track = 80;
360 drv->flags |= FDISK_DBL_SIDES;
361 break;
362
363 /* 1.2 MB 5"1/4 drive disks */
364 case 2988:
365 printf("1.49 Mb 5\"1/4 disk (1 83 18)");
366 drv->drive = FDRIVE_DRV_120;
367 drv->disk = FDRIVE_DISK_144; /* ? */
368 drv->last_sect = 18;
369 drv->max_track = 83;
370 drv->flags |= FDISK_DBL_SIDES;
371 break;
372 case 2952:
373 printf("1.48 Mb 5\"1/4 disk (1 82 18)");
374 drv->drive = FDRIVE_DRV_120;
375 drv->disk = FDRIVE_DISK_144; /* ? */
376 drv->last_sect = 18;
377 drv->max_track = 82;
378 drv->flags |= FDISK_DBL_SIDES;
379 break;
380 case 2400:
381 printf("1.2 Mb 5\"1/4 disk (1 80 15)");
382 drv->drive = FDRIVE_DRV_120;
383 drv->disk = FDRIVE_DISK_144; /* ? */
384 drv->last_sect = 15;
385 drv->max_track = 80;
386 drv->flags |= FDISK_DBL_SIDES;
387 break;
388
389 case 1760:
390 printf("880 kb 5\"1/4 disk (1 80 11)");
391 drv->drive = FDRIVE_DRV_120;
392 drv->disk = FDRIVE_DISK_144; /* ? */
393 drv->last_sect = 11;
394 drv->max_track = 80;
395 drv->flags |= FDISK_DBL_SIDES;
396 break;
397
398 /* 360 kB 5"1/4 drive disks */
399 case 840:
400 /* 420 kB 5"1/4 disk */
401 printf("420 kb 5\"1/4 disk (1 42 10)");
402 drv->drive = FDRIVE_DRV_120;
403 drv->disk = FDRIVE_DISK_144; /* ? */
404 drv->last_sect = 10;
405 drv->max_track = 42;
406 drv->flags |= FDISK_DBL_SIDES;
407 case 820:
408 /* 410 kB 5"1/4 disk */
409 printf("410 kb 5\"1/4 disk (1 41 10)");
410 drv->drive = FDRIVE_DRV_120;
411 drv->disk = FDRIVE_DISK_144; /* ? */
412 drv->last_sect = 10;
413 drv->max_track = 41;
414 drv->flags |= FDISK_DBL_SIDES;
415 case 720:
416 /* 360 kB 5"1/4 disk */
417 printf("360 kb 5\"1/4 disk (1 40 9)");
418 drv->drive = FDRIVE_DRV_120;
419 drv->disk = FDRIVE_DISK_144; /* ? */
420 drv->last_sect = 9;
421 drv->max_track = 40;
422 drv->flags |= FDISK_DBL_SIDES;
423 break;
424 }
425 printf(" %s\n", ro == 0 ? "rw" : "ro");
426 }
427 drv->ro = ro;
428 } else {
429 printf("No disk in drive\n");
430 drv->disk = FDRIVE_DISK_NONE;
431 drv->last_sect = 0;
432 drv->max_track = 0;
433 drv->flags &= ~FDISK_DBL_SIDES;
434 }
435 drv->drflags |= FDRIVE_REVALIDATE;
436 }
437
438 /* Motor control */
439 static void fd_start (fdrive_t *drv)
440 {
441 drv->drflags |= FDRIVE_MOTOR_ON;
442 }
443
444 static void fd_stop (fdrive_t *drv)
445 {
446 drv->drflags &= ~FDRIVE_MOTOR_ON;
447 }
448
449 /* Re-initialise a drives (motor off, repositioned) */
450 static void fd_reset (fdrive_t *drv)
451 {
452 fd_stop(drv);
453 fd_recalibrate(drv);
454 }
455
456 /********************************************************/
457 /* Intel 82078 floppy disk controler emulation */
458
459 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
460 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
461 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
462 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
463
464 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
465 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
466 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
467 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
468 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
469 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
470 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
471 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
472 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
473 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
474
475 enum {
476 FD_CTRL_ACTIVE = 0x01,
477 FD_CTRL_RESET = 0x02,
478 FD_CTRL_SLEEP = 0x04,
479 FD_CTRL_BUSY = 0x08,
480 FD_CTRL_INTR = 0x10,
481 };
482
483 enum {
484 FD_DIR_WRITE = 0,
485 FD_DIR_READ = 1,
486 FD_DIR_SCANE = 2,
487 FD_DIR_SCANL = 3,
488 FD_DIR_SCANH = 4,
489 };
490
491 enum {
492 FD_STATE_CMD = 0x00,
493 FD_STATE_STATUS = 0x01,
494 FD_STATE_DATA = 0x02,
495 FD_STATE_STATE = 0x03,
496 FD_STATE_MULTI = 0x10,
497 FD_STATE_SEEK = 0x20,
498 FD_STATE_FORMAT = 0x40,
499 };
500
501 #define FD_STATE(state) ((state) & FD_STATE_STATE)
502 #define FD_SET_STATE(state, new_state) \
503 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
504 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
505 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
506 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
507
508 struct fdctrl_t {
509 fdctrl_t *fdctrl;
510 /* Controler's identification */
511 uint8_t version;
512 /* HW */
513 int irq_lvl;
514 int dma_chann;
515 uint32_t io_base;
516 /* Controler state */
517 uint8_t state;
518 uint8_t dma_en;
519 uint8_t cur_drv;
520 uint8_t bootsel;
521 /* Command FIFO */
522 uint8_t fifo[FD_SECTOR_LEN];
523 uint32_t data_pos;
524 uint32_t data_len;
525 uint8_t data_state;
526 uint8_t data_dir;
527 uint8_t int_status;
528 /* States kept only to be returned back */
529 /* Timers state */
530 uint8_t timer0;
531 uint8_t timer1;
532 /* precompensation */
533 uint8_t precomp_trk;
534 uint8_t config;
535 uint8_t lock;
536 /* Power down config (also with status regB access mode */
537 uint8_t pwrd;
538 /* Floppy drives */
539 fdrive_t drives[2];
540 };
541
542 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
543 {
544 fdctrl_t *fdctrl = opaque;
545 uint32_t retval;
546
547 if (reg == fdctrl->io_base + 0x01)
548 retval = fdctrl_read_statusB(fdctrl);
549 else if (reg == fdctrl->io_base + 0x02)
550 retval = fdctrl_read_dor(fdctrl);
551 else if (reg == fdctrl->io_base + 0x03)
552 retval = fdctrl_read_tape(fdctrl);
553 else if (reg == fdctrl->io_base + 0x04)
554 retval = fdctrl_read_main_status(fdctrl);
555 else if (reg == fdctrl->io_base + 0x05)
556 retval = fdctrl_read_data(fdctrl);
557 else if (reg == fdctrl->io_base + 0x07)
558 retval = fdctrl_read_dir(fdctrl);
559 else
560 retval = (uint32_t)(-1);
561
562 return retval;
563 }
564
565 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
566 {
567 fdctrl_t *fdctrl = opaque;
568
569 if (reg == fdctrl->io_base + 0x02)
570 fdctrl_write_dor(fdctrl, value);
571 else if (reg == fdctrl->io_base + 0x03)
572 fdctrl_write_tape(fdctrl, value);
573 else if (reg == fdctrl->io_base + 0x04)
574 fdctrl_write_rate(fdctrl, value);
575 else if (reg == fdctrl->io_base + 0x05)
576 fdctrl_write_data(fdctrl, value);
577 }
578
579 static void fd_change_cb (void *opaque)
580 {
581 fdrive_t *drv = opaque;
582
583 FLOPPY_DPRINTF("disk change\n");
584 /* TODO: use command-line parameters to force geometry */
585 fd_revalidate(drv);
586 #if 0
587 fd_recalibrate(drv);
588 fdctrl_reset_fifo(drv->fdctrl);
589 fdctrl_raise_irq(drv->fdctrl, 0x20);
590 #endif
591 }
592
593 fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
594 uint32_t io_base,
595 BlockDriverState **fds)
596 {
597 fdctrl_t *fdctrl;
598 // int io_mem;
599 int i;
600
601 FLOPPY_DPRINTF("init controler\n");
602 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
603 if (!fdctrl)
604 return NULL;
605 fdctrl->version = 0x90; /* Intel 82078 controler */
606 fdctrl->irq_lvl = irq_lvl;
607 fdctrl->dma_chann = dma_chann;
608 fdctrl->io_base = io_base;
609 fdctrl->config = 0x40; /* Implicit seek, polling & FIFO enabled */
610 if (fdctrl->dma_chann != -1) {
611 fdctrl->dma_en = 1;
612 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
613 } else {
614 fdctrl->dma_en = 0;
615 }
616 for (i = 0; i < 2; i++) {
617 fd_init(&fdctrl->drives[i], fds[i]);
618 if (fds[i]) {
619 bdrv_set_change_cb(fds[i],
620 &fd_change_cb, &fdctrl->drives[i]);
621 }
622 }
623 fdctrl_reset(fdctrl, 0);
624 fdctrl->state = FD_CTRL_ACTIVE;
625 if (mem_mapped) {
626 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
627 #if 0
628 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
629 cpu_register_physical_memory(base, 0x08, io_mem);
630 #endif
631 } else {
632 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
633 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
634 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
635 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
636 }
637 for (i = 0; i < MAX_FD; i++) {
638 fd_revalidate(&fdctrl->drives[i]);
639 }
640 return fdctrl;
641 }
642
643 /* XXX: may change if moved to bdrv */
644 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
645 {
646 return fdctrl->drives[drive_num].drive;
647 }
648
649 /* Change IRQ state */
650 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
651 {
652 if (fdctrl->state & FD_CTRL_INTR) {
653 pic_set_irq(fdctrl->irq_lvl, 0);
654 fdctrl->state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY);
655 }
656 }
657
658 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
659 {
660 if (~(fdctrl->state & FD_CTRL_INTR)) {
661 pic_set_irq(fdctrl->irq_lvl, 1);
662 fdctrl->state |= FD_CTRL_INTR;
663 }
664 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
665 fdctrl->int_status = status;
666 }
667
668 /* Reset controler */
669 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
670 {
671 int i;
672
673 FLOPPY_DPRINTF("reset controler\n");
674 fdctrl_reset_irq(fdctrl);
675 /* Initialise controler */
676 fdctrl->cur_drv = 0;
677 /* FIFO state */
678 fdctrl->data_pos = 0;
679 fdctrl->data_len = 0;
680 fdctrl->data_state = FD_STATE_CMD;
681 fdctrl->data_dir = FD_DIR_WRITE;
682 for (i = 0; i < MAX_FD; i++)
683 fd_reset(&fdctrl->drives[i]);
684 fdctrl_reset_fifo(fdctrl);
685 if (do_irq)
686 fdctrl_raise_irq(fdctrl, 0x20);
687 }
688
689 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
690 {
691 return &fdctrl->drives[fdctrl->bootsel];
692 }
693
694 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
695 {
696 return &fdctrl->drives[1 - fdctrl->bootsel];
697 }
698
699 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
700 {
701 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
702 }
703
704 /* Status B register : 0x01 (read-only) */
705 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
706 {
707 fdctrl_reset_irq(fdctrl);
708 FLOPPY_DPRINTF("status register: 0x00\n");
709
710 return 0;
711 }
712
713 /* Digital output register : 0x02 */
714 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
715 {
716 uint32_t retval = 0;
717
718 /* Drive motors state indicators */
719 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
720 retval |= 1 << 5;
721 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
722 retval |= 1 << 4;
723 /* DMA enable */
724 retval |= fdctrl->dma_en << 3;
725 /* Reset indicator */
726 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
727 /* Selected drive */
728 retval |= fdctrl->cur_drv;
729 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
730
731 return retval;
732 }
733
734 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
735 {
736 fdctrl_reset_irq(fdctrl);
737 /* Reset mode */
738 if (fdctrl->state & FD_CTRL_RESET) {
739 if (!(value & 0x04)) {
740 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
741 return;
742 }
743 }
744 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
745 /* Drive motors state indicators */
746 if (value & 0x20)
747 fd_start(drv1(fdctrl));
748 else
749 fd_stop(drv1(fdctrl));
750 if (value & 0x10)
751 fd_start(drv0(fdctrl));
752 else
753 fd_stop(drv0(fdctrl));
754 /* DMA enable */
755 #if 0
756 if (fdctrl->dma_chann != -1)
757 fdctrl->dma_en = 1 - ((value >> 3) & 1);
758 #endif
759 /* Reset */
760 if (!(value & 0x04)) {
761 if (!(fdctrl->state & FD_CTRL_RESET)) {
762 FLOPPY_DPRINTF("controler enter RESET state\n");
763 fdctrl->state |= FD_CTRL_RESET;
764 fdctrl_reset(fdctrl, 1);
765 }
766 } else {
767 if (fdctrl->state & FD_CTRL_RESET) {
768 FLOPPY_DPRINTF("controler out of RESET state\n");
769 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
770 }
771 }
772 /* Selected drive */
773 fdctrl->cur_drv = value & 1;
774 }
775
776 /* Tape drive register : 0x03 */
777 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
778 {
779 uint32_t retval = 0;
780
781 fdctrl_reset_irq(fdctrl);
782 /* Disk boot selection indicator */
783 retval |= fdctrl->bootsel << 2;
784 /* Tape indicators: never allowed */
785 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
786
787 return retval;
788 }
789
790 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
791 {
792 fdctrl_reset_irq(fdctrl);
793 /* Reset mode */
794 if (fdctrl->state & FD_CTRL_RESET) {
795 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
796 return;
797 }
798 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
799 /* Disk boot selection indicator */
800 fdctrl->bootsel = (value >> 2) & 1;
801 /* Tape indicators: never allow */
802 }
803
804 /* Main status register : 0x04 (read) */
805 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
806 {
807 uint32_t retval = 0;
808
809 fdctrl_reset_irq(fdctrl);
810 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
811 if (!(fdctrl->state & FD_CTRL_BUSY)) {
812 /* Data transfer allowed */
813 retval |= 0x80;
814 /* Data transfer direction indicator */
815 if (fdctrl->data_dir == FD_DIR_READ)
816 retval |= 0x40;
817 }
818 /* Should handle 0x20 for SPECIFY command */
819 /* Command busy indicator */
820 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
821 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
822 retval |= 0x10;
823 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
824
825 return retval;
826 }
827
828 /* Data select rate register : 0x04 (write) */
829 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
830 {
831 fdctrl_reset_irq(fdctrl);
832 /* Reset mode */
833 if (fdctrl->state & FD_CTRL_RESET) {
834 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
835 return;
836 }
837 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
838 /* Reset: autoclear */
839 if (value & 0x80) {
840 fdctrl->state |= FD_CTRL_RESET;
841 fdctrl_reset(fdctrl, 1);
842 fdctrl->state &= ~FD_CTRL_RESET;
843 }
844 if (value & 0x40) {
845 fdctrl->state |= FD_CTRL_SLEEP;
846 fdctrl_reset(fdctrl, 1);
847 }
848 // fdctrl.precomp = (value >> 2) & 0x07;
849 }
850
851 /* Digital input register : 0x07 (read-only) */
852 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
853 {
854 uint32_t retval = 0;
855
856 fdctrl_reset_irq(fdctrl);
857 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
858 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
859 retval |= 0x80;
860 if (retval != 0)
861 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
862 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
863 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
864
865 return retval;
866 }
867
868 /* FIFO state control */
869 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
870 {
871 fdctrl->data_dir = FD_DIR_WRITE;
872 fdctrl->data_pos = 0;
873 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
874 }
875
876 /* Set FIFO status for the host to read */
877 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
878 {
879 fdctrl->data_dir = FD_DIR_READ;
880 fdctrl->data_len = fifo_len;
881 fdctrl->data_pos = 0;
882 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
883 if (do_irq)
884 fdctrl_raise_irq(fdctrl, 0x00);
885 }
886
887 /* Set an error: unimplemented/unknown command */
888 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
889 {
890 #if 0
891 fdrive_t *cur_drv;
892
893 cur_drv = get_cur_drv(fdctrl);
894 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl->cur_drv;
895 fdctrl->fifo[1] = 0x00;
896 fdctrl->fifo[2] = 0x00;
897 fdctrl_set_fifo(fdctrl, 3, 1);
898 #else
899 // fdctrl_reset_fifo(fdctrl);
900 fdctrl->fifo[0] = 0x80;
901 fdctrl_set_fifo(fdctrl, 1, 0);
902 #endif
903 }
904
905 /* Callback for transfer end (stop or abort) */
906 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
907 uint8_t status1, uint8_t status2)
908 {
909 fdrive_t *cur_drv;
910
911 cur_drv = get_cur_drv(fdctrl);
912 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
913 status0, status1, status2,
914 status0 | (cur_drv->head << 1) | fdctrl->cur_drv);
915 fdctrl->fifo[0] = status0 | (cur_drv->head << 1) | fdctrl->cur_drv;
916 fdctrl->fifo[1] = status1;
917 fdctrl->fifo[2] = status2;
918 fdctrl->fifo[3] = cur_drv->track;
919 fdctrl->fifo[4] = cur_drv->head;
920 fdctrl->fifo[5] = cur_drv->sect;
921 fdctrl->fifo[6] = FD_SECTOR_SC;
922 fdctrl->data_dir = FD_DIR_READ;
923 if (fdctrl->state & FD_CTRL_BUSY)
924 DMA_release_DREQ(fdctrl->dma_chann);
925 fdctrl_set_fifo(fdctrl, 7, 1);
926 }
927
928 /* Prepare a data transfer (either DMA or FIFO) */
929 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
930 {
931 fdrive_t *cur_drv;
932 uint8_t kh, kt, ks;
933 int did_seek;
934
935 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
936 cur_drv = get_cur_drv(fdctrl);
937 kt = fdctrl->fifo[2];
938 kh = fdctrl->fifo[3];
939 ks = fdctrl->fifo[4];
940 FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
941 fdctrl->cur_drv, kh, kt, ks,
942 _fd_sector(kh, kt, ks, cur_drv->last_sect));
943 did_seek = 0;
944 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
945 case 2:
946 /* sect too big */
947 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
948 fdctrl->fifo[3] = kt;
949 fdctrl->fifo[4] = kh;
950 fdctrl->fifo[5] = ks;
951 return;
952 case 3:
953 /* track too big */
954 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
955 fdctrl->fifo[3] = kt;
956 fdctrl->fifo[4] = kh;
957 fdctrl->fifo[5] = ks;
958 return;
959 case 4:
960 /* No seek enabled */
961 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
962 fdctrl->fifo[3] = kt;
963 fdctrl->fifo[4] = kh;
964 fdctrl->fifo[5] = ks;
965 return;
966 case 1:
967 did_seek = 1;
968 break;
969 default:
970 break;
971 }
972 /* Set the FIFO state */
973 fdctrl->data_dir = direction;
974 fdctrl->data_pos = 0;
975 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
976 if (fdctrl->fifo[0] & 0x80)
977 fdctrl->data_state |= FD_STATE_MULTI;
978 else
979 fdctrl->data_state &= ~FD_STATE_MULTI;
980 if (did_seek)
981 fdctrl->data_state |= FD_STATE_SEEK;
982 else
983 fdctrl->data_state &= ~FD_STATE_SEEK;
984 if (fdctrl->fifo[5] == 00) {
985 fdctrl->data_len = fdctrl->fifo[8];
986 } else {
987 int tmp;
988 fdctrl->data_len = 128 << fdctrl->fifo[5];
989 tmp = (cur_drv->last_sect - ks + 1);
990 if (fdctrl->fifo[0] & 0x80)
991 tmp += cur_drv->last_sect;
992 fdctrl->data_len *= tmp;
993 }
994 if (fdctrl->dma_en) {
995 int dma_mode;
996 /* DMA transfer are enabled. Check if DMA channel is well programmed */
997 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
998 dma_mode = (dma_mode >> 2) & 3;
999 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1000 dma_mode, direction,
1001 (128 << fdctrl->fifo[5]) *
1002 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1003 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1004 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1005 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1006 (direction == FD_DIR_READ && dma_mode == 1)) {
1007 /* No access is allowed until DMA transfer has completed */
1008 fdctrl->state |= FD_CTRL_BUSY;
1009 /* Now, we just have to wait for the DMA controler to
1010 * recall us...
1011 */
1012 DMA_hold_DREQ(fdctrl->dma_chann);
1013 DMA_schedule(fdctrl->dma_chann);
1014 return;
1015 } else {
1016 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1017 }
1018 }
1019 FLOPPY_DPRINTF("start non-DMA transfer\n");
1020 /* IO based transfer: calculate len */
1021 fdctrl_raise_irq(fdctrl, 0x00);
1022
1023 return;
1024 }
1025
1026 /* Prepare a transfer of deleted data */
1027 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1028 {
1029 /* We don't handle deleted data,
1030 * so we don't return *ANYTHING*
1031 */
1032 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1033 }
1034
1035 /* handlers for DMA transfers */
1036 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
1037 {
1038 fdctrl_t *fdctrl;
1039 fdrive_t *cur_drv;
1040 int len, start_pos, rel_pos;
1041 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1042
1043 fdctrl = opaque;
1044 fdctrl_reset_irq(fdctrl);
1045 if (!(fdctrl->state & FD_CTRL_BUSY)) {
1046 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1047 return 0;
1048 }
1049 cur_drv = get_cur_drv(fdctrl);
1050 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1051 fdctrl->data_dir == FD_DIR_SCANH)
1052 status2 = 0x04;
1053 if (size > fdctrl->data_len)
1054 size = fdctrl->data_len;
1055 if (cur_drv->bs == NULL) {
1056 if (fdctrl->data_dir == FD_DIR_WRITE)
1057 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1058 else
1059 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1060 len = 0;
1061 goto transfer_error;
1062 }
1063 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1064 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < size;) {
1065 len = size - fdctrl->data_pos;
1066 if (len + rel_pos > FD_SECTOR_LEN)
1067 len = FD_SECTOR_LEN - rel_pos;
1068 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
1069 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
1070 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1071 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1072 fd_sector(cur_drv) * 512, addr);
1073 if (fdctrl->data_dir != FD_DIR_WRITE ||
1074 len < FD_SECTOR_LEN || rel_pos != 0) {
1075 /* READ & SCAN commands and realign to a sector for WRITE */
1076 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1077 fdctrl->fifo, 1) < 0) {
1078 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1079 fd_sector(cur_drv));
1080 /* Sure, image size is too small... */
1081 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1082 }
1083 }
1084 switch (fdctrl->data_dir) {
1085 case FD_DIR_READ:
1086 /* READ commands */
1087 cpu_physical_memory_write(addr + fdctrl->data_pos,
1088 fdctrl->fifo + rel_pos, len);
1089 break;
1090 case FD_DIR_WRITE:
1091 /* WRITE commands */
1092 cpu_physical_memory_read(addr + fdctrl->data_pos,
1093 fdctrl->fifo + rel_pos, len);
1094 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1095 fdctrl->fifo, 1) < 0) {
1096 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1097 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1098 goto transfer_error;
1099 }
1100 break;
1101 default:
1102 /* SCAN commands */
1103 {
1104 uint8_t tmpbuf[FD_SECTOR_LEN];
1105 int ret;
1106 cpu_physical_memory_read(addr + fdctrl->data_pos,
1107 tmpbuf, len);
1108 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1109 if (ret == 0) {
1110 status2 = 0x08;
1111 goto end_transfer;
1112 }
1113 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1114 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1115 status2 = 0x00;
1116 goto end_transfer;
1117 }
1118 }
1119 break;
1120 }
1121 fdctrl->data_pos += len;
1122 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1123 if (rel_pos == 0) {
1124 /* Seek to next sector */
1125 cur_drv->sect++;
1126 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1127 cur_drv->head, cur_drv->track, cur_drv->sect,
1128 fd_sector(cur_drv),
1129 fdctrl->data_pos - size);
1130 if (cur_drv->sect > cur_drv->last_sect) {
1131 cur_drv->sect = 1;
1132 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1133 if (cur_drv->head == 0 &&
1134 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1135 cur_drv->head = 1;
1136 } else {
1137 cur_drv->head = 0;
1138 cur_drv->track++;
1139 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1140 break;
1141 }
1142 } else {
1143 cur_drv->track++;
1144 break;
1145 }
1146 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1147 cur_drv->head, cur_drv->track,
1148 cur_drv->sect, fd_sector(cur_drv));
1149 }
1150 }
1151 }
1152 end_transfer:
1153 len = fdctrl->data_pos - start_pos;
1154 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1155 fdctrl->data_pos, len, fdctrl->data_len);
1156 if (fdctrl->data_dir == FD_DIR_SCANE ||
1157 fdctrl->data_dir == FD_DIR_SCANL ||
1158 fdctrl->data_dir == FD_DIR_SCANH)
1159 status2 = 0x08;
1160 if (FD_DID_SEEK(fdctrl->data_state))
1161 status0 |= 0x20;
1162 fdctrl->data_len -= len;
1163 // if (fdctrl->data_len == 0)
1164 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1165 transfer_error:
1166
1167 return len;
1168 }
1169
1170 /* Data register : 0x05 */
1171 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1172 {
1173 fdrive_t *cur_drv;
1174 uint32_t retval = 0;
1175 int pos, len;
1176
1177 fdctrl_reset_irq(fdctrl);
1178 cur_drv = get_cur_drv(fdctrl);
1179 fdctrl->state &= ~FD_CTRL_SLEEP;
1180 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1181 FLOPPY_ERROR("can't read data in CMD state\n");
1182 return 0;
1183 }
1184 pos = fdctrl->data_pos;
1185 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1186 pos %= FD_SECTOR_LEN;
1187 if (pos == 0) {
1188 len = fdctrl->data_len - fdctrl->data_pos;
1189 if (len > FD_SECTOR_LEN)
1190 len = FD_SECTOR_LEN;
1191 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1192 fdctrl->fifo, len);
1193 }
1194 }
1195 retval = fdctrl->fifo[pos];
1196 if (++fdctrl->data_pos == fdctrl->data_len) {
1197 fdctrl->data_pos = 0;
1198 /* Switch from transfert mode to status mode
1199 * then from status mode to command mode
1200 */
1201 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1202 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1203 else
1204 fdctrl_reset_fifo(fdctrl);
1205 }
1206 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1207
1208 return retval;
1209 }
1210
1211 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1212 {
1213 fdrive_t *cur_drv;
1214 uint8_t kh, kt, ks;
1215 int did_seek;
1216
1217 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1218 cur_drv = get_cur_drv(fdctrl);
1219 kt = fdctrl->fifo[6];
1220 kh = fdctrl->fifo[7];
1221 ks = fdctrl->fifo[8];
1222 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1223 fdctrl->cur_drv, kh, kt, ks,
1224 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1225 did_seek = 0;
1226 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1227 case 2:
1228 /* sect too big */
1229 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1230 fdctrl->fifo[3] = kt;
1231 fdctrl->fifo[4] = kh;
1232 fdctrl->fifo[5] = ks;
1233 return;
1234 case 3:
1235 /* track too big */
1236 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1237 fdctrl->fifo[3] = kt;
1238 fdctrl->fifo[4] = kh;
1239 fdctrl->fifo[5] = ks;
1240 return;
1241 case 4:
1242 /* No seek enabled */
1243 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1244 fdctrl->fifo[3] = kt;
1245 fdctrl->fifo[4] = kh;
1246 fdctrl->fifo[5] = ks;
1247 return;
1248 case 1:
1249 did_seek = 1;
1250 fdctrl->data_state |= FD_STATE_SEEK;
1251 break;
1252 default:
1253 break;
1254 }
1255 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1256 if (cur_drv->bs == NULL ||
1257 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1258 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1259 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1260 } else {
1261 if (cur_drv->sect == cur_drv->last_sect) {
1262 fdctrl->data_state &= ~FD_STATE_FORMAT;
1263 /* Last sector done */
1264 if (FD_DID_SEEK(fdctrl->data_state))
1265 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1266 else
1267 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1268 } else {
1269 /* More to do */
1270 fdctrl->data_pos = 0;
1271 fdctrl->data_len = 4;
1272 }
1273 }
1274 }
1275
1276 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1277 {
1278 fdrive_t *cur_drv;
1279
1280 fdctrl_reset_irq(fdctrl);
1281 cur_drv = get_cur_drv(fdctrl);
1282 /* Reset mode */
1283 if (fdctrl->state & FD_CTRL_RESET) {
1284 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
1285 return;
1286 }
1287 fdctrl->state &= ~FD_CTRL_SLEEP;
1288 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1289 FLOPPY_ERROR("can't write data in status mode\n");
1290 return;
1291 }
1292 /* Is it write command time ? */
1293 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1294 /* FIFO data write */
1295 fdctrl->fifo[fdctrl->data_pos++] = value;
1296 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1297 fdctrl->data_pos == fdctrl->data_len) {
1298 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1299 fdctrl->fifo, FD_SECTOR_LEN);
1300 }
1301 /* Switch from transfert mode to status mode
1302 * then from status mode to command mode
1303 */
1304 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1305 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1306 return;
1307 }
1308 if (fdctrl->data_pos == 0) {
1309 /* Command */
1310 switch (value & 0x5F) {
1311 case 0x46:
1312 /* READ variants */
1313 FLOPPY_DPRINTF("READ command\n");
1314 /* 8 parameters cmd */
1315 fdctrl->data_len = 9;
1316 goto enqueue;
1317 case 0x4C:
1318 /* READ_DELETED variants */
1319 FLOPPY_DPRINTF("READ_DELETED command\n");
1320 /* 8 parameters cmd */
1321 fdctrl->data_len = 9;
1322 goto enqueue;
1323 case 0x50:
1324 /* SCAN_EQUAL variants */
1325 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1326 /* 8 parameters cmd */
1327 fdctrl->data_len = 9;
1328 goto enqueue;
1329 case 0x56:
1330 /* VERIFY variants */
1331 FLOPPY_DPRINTF("VERIFY command\n");
1332 /* 8 parameters cmd */
1333 fdctrl->data_len = 9;
1334 goto enqueue;
1335 case 0x59:
1336 /* SCAN_LOW_OR_EQUAL variants */
1337 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1338 /* 8 parameters cmd */
1339 fdctrl->data_len = 9;
1340 goto enqueue;
1341 case 0x5D:
1342 /* SCAN_HIGH_OR_EQUAL variants */
1343 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1344 /* 8 parameters cmd */
1345 fdctrl->data_len = 9;
1346 goto enqueue;
1347 default:
1348 break;
1349 }
1350 switch (value & 0x7F) {
1351 case 0x45:
1352 /* WRITE variants */
1353 FLOPPY_DPRINTF("WRITE command\n");
1354 /* 8 parameters cmd */
1355 fdctrl->data_len = 9;
1356 goto enqueue;
1357 case 0x49:
1358 /* WRITE_DELETED variants */
1359 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1360 /* 8 parameters cmd */
1361 fdctrl->data_len = 9;
1362 goto enqueue;
1363 default:
1364 break;
1365 }
1366 switch (value) {
1367 case 0x03:
1368 /* SPECIFY */
1369 FLOPPY_DPRINTF("SPECIFY command\n");
1370 /* 1 parameter cmd */
1371 fdctrl->data_len = 3;
1372 goto enqueue;
1373 case 0x04:
1374 /* SENSE_DRIVE_STATUS */
1375 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1376 /* 1 parameter cmd */
1377 fdctrl->data_len = 2;
1378 goto enqueue;
1379 case 0x07:
1380 /* RECALIBRATE */
1381 FLOPPY_DPRINTF("RECALIBRATE command\n");
1382 /* 1 parameter cmd */
1383 fdctrl->data_len = 2;
1384 goto enqueue;
1385 case 0x08:
1386 /* SENSE_INTERRUPT_STATUS */
1387 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1388 fdctrl->int_status);
1389 /* No parameters cmd: returns status if no interrupt */
1390 fdctrl->fifo[0] =
1391 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1392 fdctrl->fifo[1] = cur_drv->track;
1393 fdctrl_set_fifo(fdctrl, 2, 0);
1394 fdctrl_reset_irq(fdctrl);
1395 fdctrl->int_status = 0xC0;
1396 return;
1397 case 0x0E:
1398 /* DUMPREG */
1399 FLOPPY_DPRINTF("DUMPREG command\n");
1400 /* Drives position */
1401 fdctrl->fifo[0] = drv0(fdctrl)->track;
1402 fdctrl->fifo[1] = drv1(fdctrl)->track;
1403 fdctrl->fifo[2] = 0;
1404 fdctrl->fifo[3] = 0;
1405 /* timers */
1406 fdctrl->fifo[4] = fdctrl->timer0;
1407 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1408 fdctrl->fifo[6] = cur_drv->last_sect;
1409 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1410 (cur_drv->perpendicular << 2);
1411 fdctrl->fifo[8] = fdctrl->config;
1412 fdctrl->fifo[9] = fdctrl->precomp_trk;
1413 fdctrl_set_fifo(fdctrl, 10, 0);
1414 return;
1415 case 0x0F:
1416 /* SEEK */
1417 FLOPPY_DPRINTF("SEEK command\n");
1418 /* 2 parameters cmd */
1419 fdctrl->data_len = 3;
1420 goto enqueue;
1421 case 0x10:
1422 /* VERSION */
1423 FLOPPY_DPRINTF("VERSION command\n");
1424 /* No parameters cmd */
1425 /* Controler's version */
1426 fdctrl->fifo[0] = fdctrl->version;
1427 fdctrl_set_fifo(fdctrl, 1, 1);
1428 return;
1429 case 0x12:
1430 /* PERPENDICULAR_MODE */
1431 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1432 /* 1 parameter cmd */
1433 fdctrl->data_len = 2;
1434 goto enqueue;
1435 case 0x13:
1436 /* CONFIGURE */
1437 FLOPPY_DPRINTF("CONFIGURE command\n");
1438 /* 3 parameters cmd */
1439 fdctrl->data_len = 4;
1440 goto enqueue;
1441 case 0x14:
1442 /* UNLOCK */
1443 FLOPPY_DPRINTF("UNLOCK command\n");
1444 /* No parameters cmd */
1445 fdctrl->lock = 0;
1446 fdctrl->fifo[0] = 0;
1447 fdctrl_set_fifo(fdctrl, 1, 0);
1448 return;
1449 case 0x17:
1450 /* POWERDOWN_MODE */
1451 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1452 /* 2 parameters cmd */
1453 fdctrl->data_len = 3;
1454 goto enqueue;
1455 case 0x18:
1456 /* PART_ID */
1457 FLOPPY_DPRINTF("PART_ID command\n");
1458 /* No parameters cmd */
1459 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1460 fdctrl_set_fifo(fdctrl, 1, 0);
1461 return;
1462 case 0x2C:
1463 /* SAVE */
1464 FLOPPY_DPRINTF("SAVE command\n");
1465 /* No parameters cmd */
1466 fdctrl->fifo[0] = 0;
1467 fdctrl->fifo[1] = 0;
1468 /* Drives position */
1469 fdctrl->fifo[2] = drv0(fdctrl)->track;
1470 fdctrl->fifo[3] = drv1(fdctrl)->track;
1471 fdctrl->fifo[4] = 0;
1472 fdctrl->fifo[5] = 0;
1473 /* timers */
1474 fdctrl->fifo[6] = fdctrl->timer0;
1475 fdctrl->fifo[7] = fdctrl->timer1;
1476 fdctrl->fifo[8] = cur_drv->last_sect;
1477 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1478 (cur_drv->perpendicular << 2);
1479 fdctrl->fifo[10] = fdctrl->config;
1480 fdctrl->fifo[11] = fdctrl->precomp_trk;
1481 fdctrl->fifo[12] = fdctrl->pwrd;
1482 fdctrl->fifo[13] = 0;
1483 fdctrl->fifo[14] = 0;
1484 fdctrl_set_fifo(fdctrl, 15, 1);
1485 return;
1486 case 0x33:
1487 /* OPTION */
1488 FLOPPY_DPRINTF("OPTION command\n");
1489 /* 1 parameter cmd */
1490 fdctrl->data_len = 2;
1491 goto enqueue;
1492 case 0x42:
1493 /* READ_TRACK */
1494 FLOPPY_DPRINTF("READ_TRACK command\n");
1495 /* 8 parameters cmd */
1496 fdctrl->data_len = 9;
1497 goto enqueue;
1498 case 0x4A:
1499 /* READ_ID */
1500 FLOPPY_DPRINTF("READ_ID command\n");
1501 /* 1 parameter cmd */
1502 fdctrl->data_len = 2;
1503 goto enqueue;
1504 case 0x4C:
1505 /* RESTORE */
1506 FLOPPY_DPRINTF("RESTORE command\n");
1507 /* 17 parameters cmd */
1508 fdctrl->data_len = 18;
1509 goto enqueue;
1510 case 0x4D:
1511 /* FORMAT_TRACK */
1512 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1513 /* 5 parameters cmd */
1514 fdctrl->data_len = 6;
1515 goto enqueue;
1516 case 0x8E:
1517 /* DRIVE_SPECIFICATION_COMMAND */
1518 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1519 /* 5 parameters cmd */
1520 fdctrl->data_len = 6;
1521 goto enqueue;
1522 case 0x8F:
1523 /* RELATIVE_SEEK_OUT */
1524 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1525 /* 2 parameters cmd */
1526 fdctrl->data_len = 3;
1527 goto enqueue;
1528 case 0x94:
1529 /* LOCK */
1530 FLOPPY_DPRINTF("LOCK command\n");
1531 /* No parameters cmd */
1532 fdctrl->lock = 1;
1533 fdctrl->fifo[0] = 0x10;
1534 fdctrl_set_fifo(fdctrl, 1, 1);
1535 return;
1536 case 0xCD:
1537 /* FORMAT_AND_WRITE */
1538 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1539 /* 10 parameters cmd */
1540 fdctrl->data_len = 11;
1541 goto enqueue;
1542 case 0xCF:
1543 /* RELATIVE_SEEK_IN */
1544 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1545 /* 2 parameters cmd */
1546 fdctrl->data_len = 3;
1547 goto enqueue;
1548 default:
1549 /* Unknown command */
1550 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1551 fdctrl_unimplemented(fdctrl);
1552 return;
1553 }
1554 }
1555 enqueue:
1556 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1557 fdctrl->fifo[fdctrl->data_pos] = value;
1558 if (++fdctrl->data_pos == fdctrl->data_len) {
1559 /* We now have all parameters
1560 * and will be able to treat the command
1561 */
1562 if (fdctrl->data_state & FD_STATE_FORMAT) {
1563 fdctrl_format_sector(fdctrl);
1564 return;
1565 }
1566 switch (fdctrl->fifo[0] & 0x1F) {
1567 case 0x06:
1568 {
1569 /* READ variants */
1570 FLOPPY_DPRINTF("treat READ command\n");
1571 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1572 return;
1573 }
1574 case 0x0C:
1575 /* READ_DELETED variants */
1576 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1577 FLOPPY_ERROR("treat READ_DELETED command\n");
1578 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1579 return;
1580 case 0x16:
1581 /* VERIFY variants */
1582 // FLOPPY_DPRINTF("treat VERIFY command\n");
1583 FLOPPY_ERROR("treat VERIFY command\n");
1584 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1585 return;
1586 case 0x10:
1587 /* SCAN_EQUAL variants */
1588 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1589 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1590 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1591 return;
1592 case 0x19:
1593 /* SCAN_LOW_OR_EQUAL variants */
1594 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1595 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1596 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1597 return;
1598 case 0x1D:
1599 /* SCAN_HIGH_OR_EQUAL variants */
1600 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1601 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1602 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1603 return;
1604 default:
1605 break;
1606 }
1607 switch (fdctrl->fifo[0] & 0x3F) {
1608 case 0x05:
1609 /* WRITE variants */
1610 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1611 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1612 return;
1613 case 0x09:
1614 /* WRITE_DELETED variants */
1615 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1616 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1617 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1618 return;
1619 default:
1620 break;
1621 }
1622 switch (fdctrl->fifo[0]) {
1623 case 0x03:
1624 /* SPECIFY */
1625 FLOPPY_DPRINTF("treat SPECIFY command\n");
1626 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1627 fdctrl->timer1 = fdctrl->fifo[1] >> 1;
1628 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1629 /* No result back */
1630 fdctrl_reset_fifo(fdctrl);
1631 break;
1632 case 0x04:
1633 /* SENSE_DRIVE_STATUS */
1634 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1635 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1636 cur_drv = get_cur_drv(fdctrl);
1637 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1638 /* 1 Byte status back */
1639 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1640 (cur_drv->track == 0 ? 0x10 : 0x00) |
1641 fdctrl->cur_drv;
1642 fdctrl_set_fifo(fdctrl, 1, 0);
1643 break;
1644 case 0x07:
1645 /* RECALIBRATE */
1646 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1647 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1648 cur_drv = get_cur_drv(fdctrl);
1649 fd_recalibrate(cur_drv);
1650 fdctrl_reset_fifo(fdctrl);
1651 /* Raise Interrupt */
1652 fdctrl_raise_irq(fdctrl, 0x20);
1653 break;
1654 case 0x0F:
1655 /* SEEK */
1656 FLOPPY_DPRINTF("treat SEEK command\n");
1657 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1658 cur_drv = get_cur_drv(fdctrl);
1659 fd_start(cur_drv);
1660 if (fdctrl->fifo[2] <= cur_drv->track)
1661 cur_drv->dir = 1;
1662 else
1663 cur_drv->dir = 0;
1664 fdctrl_reset_fifo(fdctrl);
1665 if (fdctrl->fifo[2] > cur_drv->max_track) {
1666 fdctrl_raise_irq(fdctrl, 0x60);
1667 } else {
1668 cur_drv->track = fdctrl->fifo[2];
1669 /* Raise Interrupt */
1670 fdctrl_raise_irq(fdctrl, 0x20);
1671 }
1672 break;
1673 case 0x12:
1674 /* PERPENDICULAR_MODE */
1675 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1676 if (fdctrl->fifo[1] & 0x80)
1677 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1678 /* No result back */
1679 fdctrl_reset_fifo(fdctrl);
1680 break;
1681 case 0x13:
1682 /* CONFIGURE */
1683 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1684 fdctrl->config = fdctrl->fifo[2];
1685 fdctrl->precomp_trk = fdctrl->fifo[3];
1686 /* No result back */
1687 fdctrl_reset_fifo(fdctrl);
1688 break;
1689 case 0x17:
1690 /* POWERDOWN_MODE */
1691 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1692 fdctrl->pwrd = fdctrl->fifo[1];
1693 fdctrl->fifo[0] = fdctrl->fifo[1];
1694 fdctrl_set_fifo(fdctrl, 1, 1);
1695 break;
1696 case 0x33:
1697 /* OPTION */
1698 FLOPPY_DPRINTF("treat OPTION command\n");
1699 /* No result back */
1700 fdctrl_reset_fifo(fdctrl);
1701 break;
1702 case 0x42:
1703 /* READ_TRACK */
1704 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1705 FLOPPY_ERROR("treat READ_TRACK command\n");
1706 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1707 break;
1708 case 0x4A:
1709 /* READ_ID */
1710 FLOPPY_DPRINTF("treat READ_ID command\n");
1711 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1712 break;
1713 case 0x4C:
1714 /* RESTORE */
1715 FLOPPY_DPRINTF("treat RESTORE command\n");
1716 /* Drives position */
1717 drv0(fdctrl)->track = fdctrl->fifo[3];
1718 drv1(fdctrl)->track = fdctrl->fifo[4];
1719 /* timers */
1720 fdctrl->timer0 = fdctrl->fifo[7];
1721 fdctrl->timer1 = fdctrl->fifo[8];
1722 cur_drv->last_sect = fdctrl->fifo[9];
1723 fdctrl->lock = fdctrl->fifo[10] >> 7;
1724 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1725 fdctrl->config = fdctrl->fifo[11];
1726 fdctrl->precomp_trk = fdctrl->fifo[12];
1727 fdctrl->pwrd = fdctrl->fifo[13];
1728 fdctrl_reset_fifo(fdctrl);
1729 break;
1730 case 0x4D:
1731 /* FORMAT_TRACK */
1732 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1733 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1734 cur_drv = get_cur_drv(fdctrl);
1735 fdctrl->data_state |= FD_STATE_FORMAT;
1736 if (fdctrl->fifo[0] & 0x80)
1737 fdctrl->data_state |= FD_STATE_MULTI;
1738 else
1739 fdctrl->data_state &= ~FD_STATE_MULTI;
1740 fdctrl->data_state &= ~FD_STATE_SEEK;
1741 cur_drv->bps =
1742 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1743 #if 0
1744 cur_drv->last_sect =
1745 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1746 fdctrl->fifo[3] / 2;
1747 #else
1748 cur_drv->last_sect = fdctrl->fifo[3];
1749 #endif
1750 /* Bochs BIOS is buggy and don't send format informations
1751 * for each sector. So, pretend all's done right now...
1752 */
1753 fdctrl->data_state &= ~FD_STATE_FORMAT;
1754 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1755 break;
1756 case 0x8E:
1757 /* DRIVE_SPECIFICATION_COMMAND */
1758 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1759 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1760 /* Command parameters done */
1761 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1762 fdctrl->fifo[0] = fdctrl->fifo[1];
1763 fdctrl->fifo[2] = 0;
1764 fdctrl->fifo[3] = 0;
1765 fdctrl_set_fifo(fdctrl, 4, 1);
1766 } else {
1767 fdctrl_reset_fifo(fdctrl);
1768 }
1769 } else if (fdctrl->data_len > 7) {
1770 /* ERROR */
1771 fdctrl->fifo[0] = 0x80 |
1772 (cur_drv->head << 2) | fdctrl->cur_drv;
1773 fdctrl_set_fifo(fdctrl, 1, 1);
1774 }
1775 break;
1776 case 0x8F:
1777 /* RELATIVE_SEEK_OUT */
1778 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1779 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1780 cur_drv = get_cur_drv(fdctrl);
1781 fd_start(cur_drv);
1782 cur_drv->dir = 0;
1783 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1784 cur_drv->track = cur_drv->max_track - 1;
1785 } else {
1786 cur_drv->track += fdctrl->fifo[2];
1787 }
1788 fdctrl_reset_fifo(fdctrl);
1789 fdctrl_raise_irq(fdctrl, 0x20);
1790 break;
1791 case 0xCD:
1792 /* FORMAT_AND_WRITE */
1793 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1794 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1795 fdctrl_unimplemented(fdctrl);
1796 break;
1797 case 0xCF:
1798 /* RELATIVE_SEEK_IN */
1799 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1800 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1801 cur_drv = get_cur_drv(fdctrl);
1802 fd_start(cur_drv);
1803 cur_drv->dir = 1;
1804 if (fdctrl->fifo[2] > cur_drv->track) {
1805 cur_drv->track = 0;
1806 } else {
1807 cur_drv->track -= fdctrl->fifo[2];
1808 }
1809 fdctrl_reset_fifo(fdctrl);
1810 /* Raise Interrupt */
1811 fdctrl_raise_irq(fdctrl, 0x20);
1812 break;
1813 }
1814 }
1815 }
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