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Fix wrong signedness, by Andre Przywara.
[qemu.git] / hw / fdc.c
1 /*
2 * QEMU Floppy disk emulator (Intel 82078)
3 *
4 * Copyright (c) 2003, 2007 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 /*
25 * The controller is used in Sun4m systems in a slightly different
26 * way. There are changes in DOR register and DMA is not available.
27 */
28 #include "hw.h"
29 #include "fdc.h"
30 #include "block.h"
31 #include "qemu-timer.h"
32 #include "isa.h"
33
34 /********************************************************/
35 /* debug Floppy devices */
36 //#define DEBUG_FLOPPY
37
38 #ifdef DEBUG_FLOPPY
39 #define FLOPPY_DPRINTF(fmt, args...) \
40 do { printf("FLOPPY: " fmt , ##args); } while (0)
41 #else
42 #define FLOPPY_DPRINTF(fmt, args...)
43 #endif
44
45 #define FLOPPY_ERROR(fmt, args...) \
46 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
47
48 /********************************************************/
49 /* Floppy drive emulation */
50
51 /* Will always be a fixed parameter for us */
52 #define FD_SECTOR_LEN 512
53 #define FD_SECTOR_SC 2 /* Sector size code */
54
55 /* Floppy disk drive emulation */
56 typedef enum fdisk_type_t {
57 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
58 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
59 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
60 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
61 FDRIVE_DISK_NONE = 0x05, /* No disk */
62 } fdisk_type_t;
63
64 typedef enum fdrive_type_t {
65 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
66 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
67 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
68 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
69 } fdrive_type_t;
70
71 typedef enum fdrive_flags_t {
72 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
73 } fdrive_flags_t;
74
75 typedef enum fdisk_flags_t {
76 FDISK_DBL_SIDES = 0x01,
77 } fdisk_flags_t;
78
79 typedef struct fdrive_t {
80 BlockDriverState *bs;
81 /* Drive status */
82 fdrive_type_t drive;
83 fdrive_flags_t drflags;
84 uint8_t perpendicular; /* 2.88 MB access mode */
85 /* Position */
86 uint8_t head;
87 uint8_t track;
88 uint8_t sect;
89 /* Last operation status */
90 uint8_t dir; /* Direction */
91 uint8_t rw; /* Read/write */
92 /* Media */
93 fdisk_flags_t flags;
94 uint8_t last_sect; /* Nb sector per track */
95 uint8_t max_track; /* Nb of tracks */
96 uint16_t bps; /* Bytes per sector */
97 uint8_t ro; /* Is read-only */
98 } fdrive_t;
99
100 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
101 {
102 /* Drive */
103 drv->bs = bs;
104 drv->drive = FDRIVE_DRV_NONE;
105 drv->drflags = 0;
106 drv->perpendicular = 0;
107 /* Disk */
108 drv->last_sect = 0;
109 drv->max_track = 0;
110 }
111
112 static int _fd_sector (uint8_t head, uint8_t track,
113 uint8_t sect, uint8_t last_sect)
114 {
115 return (((track * 2) + head) * last_sect) + sect - 1;
116 }
117
118 /* Returns current position, in sectors, for given drive */
119 static int fd_sector (fdrive_t *drv)
120 {
121 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
122 }
123
124 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
125 int enable_seek)
126 {
127 uint32_t sector;
128 int ret;
129
130 if (track > drv->max_track ||
131 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
132 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
133 head, track, sect, 1,
134 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
135 drv->max_track, drv->last_sect);
136 return 2;
137 }
138 if (sect > drv->last_sect) {
139 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
140 head, track, sect, 1,
141 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
142 drv->max_track, drv->last_sect);
143 return 3;
144 }
145 sector = _fd_sector(head, track, sect, drv->last_sect);
146 ret = 0;
147 if (sector != fd_sector(drv)) {
148 #if 0
149 if (!enable_seek) {
150 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
151 head, track, sect, 1, drv->max_track, drv->last_sect);
152 return 4;
153 }
154 #endif
155 drv->head = head;
156 if (drv->track != track)
157 ret = 1;
158 drv->track = track;
159 drv->sect = sect;
160 }
161
162 return ret;
163 }
164
165 /* Set drive back to track 0 */
166 static void fd_recalibrate (fdrive_t *drv)
167 {
168 FLOPPY_DPRINTF("recalibrate\n");
169 drv->head = 0;
170 drv->track = 0;
171 drv->sect = 1;
172 drv->dir = 1;
173 drv->rw = 0;
174 }
175
176 /* Recognize floppy formats */
177 typedef struct fd_format_t {
178 fdrive_type_t drive;
179 fdisk_type_t disk;
180 uint8_t last_sect;
181 uint8_t max_track;
182 uint8_t max_head;
183 const char *str;
184 } fd_format_t;
185
186 static const fd_format_t fd_formats[] = {
187 /* First entry is default format */
188 /* 1.44 MB 3"1/2 floppy disks */
189 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
190 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
191 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
192 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
193 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
194 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
195 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
196 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
197 /* 2.88 MB 3"1/2 floppy disks */
198 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
199 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
200 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
201 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
202 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
203 /* 720 kB 3"1/2 floppy disks */
204 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
205 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
206 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
207 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
208 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
209 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
210 /* 1.2 MB 5"1/4 floppy disks */
211 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
212 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
213 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
214 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
215 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
216 /* 720 kB 5"1/4 floppy disks */
217 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
219 /* 360 kB 5"1/4 floppy disks */
220 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
221 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
222 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
223 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
224 /* 320 kB 5"1/4 floppy disks */
225 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
226 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
227 /* 360 kB must match 5"1/4 better than 3"1/2... */
228 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
229 /* end */
230 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
231 };
232
233 /* Revalidate a disk drive after a disk change */
234 static void fd_revalidate (fdrive_t *drv)
235 {
236 const fd_format_t *parse;
237 int64_t nb_sectors, size;
238 int i, first_match, match;
239 int nb_heads, max_track, last_sect, ro;
240
241 FLOPPY_DPRINTF("revalidate\n");
242 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
243 ro = bdrv_is_read_only(drv->bs);
244 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
245 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
246 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
247 nb_heads - 1, max_track, last_sect);
248 } else {
249 bdrv_get_geometry(drv->bs, &nb_sectors);
250 match = -1;
251 first_match = -1;
252 for (i = 0;; i++) {
253 parse = &fd_formats[i];
254 if (parse->drive == FDRIVE_DRV_NONE)
255 break;
256 if (drv->drive == parse->drive ||
257 drv->drive == FDRIVE_DRV_NONE) {
258 size = (parse->max_head + 1) * parse->max_track *
259 parse->last_sect;
260 if (nb_sectors == size) {
261 match = i;
262 break;
263 }
264 if (first_match == -1)
265 first_match = i;
266 }
267 }
268 if (match == -1) {
269 if (first_match == -1)
270 match = 1;
271 else
272 match = first_match;
273 parse = &fd_formats[match];
274 }
275 nb_heads = parse->max_head + 1;
276 max_track = parse->max_track;
277 last_sect = parse->last_sect;
278 drv->drive = parse->drive;
279 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
280 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
281 }
282 if (nb_heads == 1) {
283 drv->flags &= ~FDISK_DBL_SIDES;
284 } else {
285 drv->flags |= FDISK_DBL_SIDES;
286 }
287 drv->max_track = max_track;
288 drv->last_sect = last_sect;
289 drv->ro = ro;
290 } else {
291 FLOPPY_DPRINTF("No disk in drive\n");
292 drv->last_sect = 0;
293 drv->max_track = 0;
294 drv->flags &= ~FDISK_DBL_SIDES;
295 }
296 }
297
298 /* Motor control */
299 static void fd_start (fdrive_t *drv)
300 {
301 drv->drflags |= FDRIVE_MOTOR_ON;
302 }
303
304 static void fd_stop (fdrive_t *drv)
305 {
306 drv->drflags &= ~FDRIVE_MOTOR_ON;
307 }
308
309 /* Re-initialise a drives (motor off, repositioned) */
310 static void fd_reset (fdrive_t *drv)
311 {
312 fd_stop(drv);
313 fd_recalibrate(drv);
314 }
315
316 /********************************************************/
317 /* Intel 82078 floppy disk controller emulation */
318
319 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
320 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
321 static int fdctrl_transfer_handler (void *opaque, int nchan,
322 int dma_pos, int dma_len);
323 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
324 static void fdctrl_result_timer(void *opaque);
325
326 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
327 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
328 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
329 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
330 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
331 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
332 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
333 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
334 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
335 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
336
337 enum {
338 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
339 FD_CTRL_RESET = 0x02,
340 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
341 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
342 FD_CTRL_INTR = 0x10,
343 };
344
345 enum {
346 FD_DIR_WRITE = 0,
347 FD_DIR_READ = 1,
348 FD_DIR_SCANE = 2,
349 FD_DIR_SCANL = 3,
350 FD_DIR_SCANH = 4,
351 };
352
353 enum {
354 FD_STATE_CMD = 0x00,
355 FD_STATE_STATUS = 0x01,
356 FD_STATE_DATA = 0x02,
357 FD_STATE_STATE = 0x03,
358 FD_STATE_MULTI = 0x10,
359 FD_STATE_SEEK = 0x20,
360 FD_STATE_FORMAT = 0x40,
361 };
362
363 #define FD_STATE(state) ((state) & FD_STATE_STATE)
364 #define FD_SET_STATE(state, new_state) \
365 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
366 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
367 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
368 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
369
370 struct fdctrl_t {
371 fdctrl_t *fdctrl;
372 /* Controller's identification */
373 uint8_t version;
374 /* HW */
375 qemu_irq irq;
376 int dma_chann;
377 target_phys_addr_t io_base;
378 /* Controller state */
379 QEMUTimer *result_timer;
380 uint8_t state;
381 uint8_t dma_en;
382 uint8_t cur_drv;
383 uint8_t bootsel;
384 /* Command FIFO */
385 uint8_t fifo[FD_SECTOR_LEN];
386 uint32_t data_pos;
387 uint32_t data_len;
388 uint8_t data_state;
389 uint8_t data_dir;
390 uint8_t int_status;
391 uint8_t eot; /* last wanted sector */
392 /* States kept only to be returned back */
393 /* Timers state */
394 uint8_t timer0;
395 uint8_t timer1;
396 /* precompensation */
397 uint8_t precomp_trk;
398 uint8_t config;
399 uint8_t lock;
400 /* Power down config (also with status regB access mode */
401 uint8_t pwrd;
402 /* Sun4m quirks? */
403 int sun4m;
404 /* Floppy drives */
405 fdrive_t drives[2];
406 };
407
408 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
409 {
410 fdctrl_t *fdctrl = opaque;
411 uint32_t retval;
412
413 switch (reg & 0x07) {
414 case 0x00:
415 if (fdctrl->sun4m) {
416 // Identify to Linux as S82078B
417 retval = fdctrl_read_statusB(fdctrl);
418 } else {
419 retval = (uint32_t)(-1);
420 }
421 break;
422 case 0x01:
423 retval = fdctrl_read_statusB(fdctrl);
424 break;
425 case 0x02:
426 retval = fdctrl_read_dor(fdctrl);
427 break;
428 case 0x03:
429 retval = fdctrl_read_tape(fdctrl);
430 break;
431 case 0x04:
432 retval = fdctrl_read_main_status(fdctrl);
433 break;
434 case 0x05:
435 retval = fdctrl_read_data(fdctrl);
436 break;
437 case 0x07:
438 retval = fdctrl_read_dir(fdctrl);
439 break;
440 default:
441 retval = (uint32_t)(-1);
442 break;
443 }
444 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
445
446 return retval;
447 }
448
449 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
450 {
451 fdctrl_t *fdctrl = opaque;
452
453 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
454
455 switch (reg & 0x07) {
456 case 0x02:
457 fdctrl_write_dor(fdctrl, value);
458 break;
459 case 0x03:
460 fdctrl_write_tape(fdctrl, value);
461 break;
462 case 0x04:
463 fdctrl_write_rate(fdctrl, value);
464 break;
465 case 0x05:
466 fdctrl_write_data(fdctrl, value);
467 break;
468 default:
469 break;
470 }
471 }
472
473 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
474 {
475 return fdctrl_read(opaque, (uint32_t)reg);
476 }
477
478 static void fdctrl_write_mem (void *opaque,
479 target_phys_addr_t reg, uint32_t value)
480 {
481 fdctrl_write(opaque, (uint32_t)reg, value);
482 }
483
484 static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
485 fdctrl_read_mem,
486 fdctrl_read_mem,
487 fdctrl_read_mem,
488 };
489
490 static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
491 fdctrl_write_mem,
492 fdctrl_write_mem,
493 fdctrl_write_mem,
494 };
495
496 static void fd_save (QEMUFile *f, fdrive_t *fd)
497 {
498 uint8_t tmp;
499
500 tmp = fd->drflags;
501 qemu_put_8s(f, &tmp);
502 qemu_put_8s(f, &fd->head);
503 qemu_put_8s(f, &fd->track);
504 qemu_put_8s(f, &fd->sect);
505 qemu_put_8s(f, &fd->dir);
506 qemu_put_8s(f, &fd->rw);
507 }
508
509 static void fdc_save (QEMUFile *f, void *opaque)
510 {
511 fdctrl_t *s = opaque;
512
513 qemu_put_8s(f, &s->state);
514 qemu_put_8s(f, &s->dma_en);
515 qemu_put_8s(f, &s->cur_drv);
516 qemu_put_8s(f, &s->bootsel);
517 qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN);
518 qemu_put_be32s(f, &s->data_pos);
519 qemu_put_be32s(f, &s->data_len);
520 qemu_put_8s(f, &s->data_state);
521 qemu_put_8s(f, &s->data_dir);
522 qemu_put_8s(f, &s->int_status);
523 qemu_put_8s(f, &s->eot);
524 qemu_put_8s(f, &s->timer0);
525 qemu_put_8s(f, &s->timer1);
526 qemu_put_8s(f, &s->precomp_trk);
527 qemu_put_8s(f, &s->config);
528 qemu_put_8s(f, &s->lock);
529 qemu_put_8s(f, &s->pwrd);
530 fd_save(f, &s->drives[0]);
531 fd_save(f, &s->drives[1]);
532 }
533
534 static int fd_load (QEMUFile *f, fdrive_t *fd)
535 {
536 uint8_t tmp;
537
538 qemu_get_8s(f, &tmp);
539 fd->drflags = tmp;
540 qemu_get_8s(f, &fd->head);
541 qemu_get_8s(f, &fd->track);
542 qemu_get_8s(f, &fd->sect);
543 qemu_get_8s(f, &fd->dir);
544 qemu_get_8s(f, &fd->rw);
545
546 return 0;
547 }
548
549 static int fdc_load (QEMUFile *f, void *opaque, int version_id)
550 {
551 fdctrl_t *s = opaque;
552 int ret;
553
554 if (version_id != 1)
555 return -EINVAL;
556
557 qemu_get_8s(f, &s->state);
558 qemu_get_8s(f, &s->dma_en);
559 qemu_get_8s(f, &s->cur_drv);
560 qemu_get_8s(f, &s->bootsel);
561 qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN);
562 qemu_get_be32s(f, &s->data_pos);
563 qemu_get_be32s(f, &s->data_len);
564 qemu_get_8s(f, &s->data_state);
565 qemu_get_8s(f, &s->data_dir);
566 qemu_get_8s(f, &s->int_status);
567 qemu_get_8s(f, &s->eot);
568 qemu_get_8s(f, &s->timer0);
569 qemu_get_8s(f, &s->timer1);
570 qemu_get_8s(f, &s->precomp_trk);
571 qemu_get_8s(f, &s->config);
572 qemu_get_8s(f, &s->lock);
573 qemu_get_8s(f, &s->pwrd);
574
575 ret = fd_load(f, &s->drives[0]);
576 if (ret == 0)
577 ret = fd_load(f, &s->drives[1]);
578
579 return ret;
580 }
581
582 static void fdctrl_external_reset(void *opaque)
583 {
584 fdctrl_t *s = opaque;
585
586 fdctrl_reset(s, 0);
587 }
588
589 fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
590 target_phys_addr_t io_base,
591 BlockDriverState **fds)
592 {
593 fdctrl_t *fdctrl;
594 int io_mem;
595 int i;
596
597 FLOPPY_DPRINTF("init controller\n");
598 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
599 if (!fdctrl)
600 return NULL;
601 fdctrl->result_timer = qemu_new_timer(vm_clock,
602 fdctrl_result_timer, fdctrl);
603
604 fdctrl->version = 0x90; /* Intel 82078 controller */
605 fdctrl->irq = irq;
606 fdctrl->dma_chann = dma_chann;
607 fdctrl->io_base = io_base;
608 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
609 fdctrl->sun4m = 0;
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 }
619 fdctrl_reset(fdctrl, 0);
620 fdctrl->state = FD_CTRL_ACTIVE;
621 if (mem_mapped) {
622 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
623 fdctrl);
624 cpu_register_physical_memory(io_base, 0x08, io_mem);
625 } else {
626 register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read,
627 fdctrl);
628 register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read,
629 fdctrl);
630 register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write,
631 fdctrl);
632 register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write,
633 fdctrl);
634 }
635 register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl);
636 qemu_register_reset(fdctrl_external_reset, fdctrl);
637 for (i = 0; i < 2; i++) {
638 fd_revalidate(&fdctrl->drives[i]);
639 }
640
641 return fdctrl;
642 }
643
644 fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base,
645 BlockDriverState **fds)
646 {
647 fdctrl_t *fdctrl;
648
649 fdctrl = fdctrl_init(irq, 0, 1, io_base, fds);
650 fdctrl->sun4m = 1;
651
652 return fdctrl;
653 }
654
655 /* XXX: may change if moved to bdrv */
656 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
657 {
658 return fdctrl->drives[drive_num].drive;
659 }
660
661 /* Change IRQ state */
662 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
663 {
664 FLOPPY_DPRINTF("Reset interrupt\n");
665 qemu_set_irq(fdctrl->irq, 0);
666 fdctrl->state &= ~FD_CTRL_INTR;
667 }
668
669 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
670 {
671 // Sparc mutation
672 if (fdctrl->sun4m && !fdctrl->dma_en) {
673 fdctrl->state &= ~FD_CTRL_BUSY;
674 fdctrl->int_status = status;
675 return;
676 }
677 if (~(fdctrl->state & FD_CTRL_INTR)) {
678 qemu_set_irq(fdctrl->irq, 1);
679 fdctrl->state |= FD_CTRL_INTR;
680 }
681 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
682 fdctrl->int_status = status;
683 }
684
685 /* Reset controller */
686 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
687 {
688 int i;
689
690 FLOPPY_DPRINTF("reset controller\n");
691 fdctrl_reset_irq(fdctrl);
692 /* Initialise controller */
693 fdctrl->cur_drv = 0;
694 /* FIFO state */
695 fdctrl->data_pos = 0;
696 fdctrl->data_len = 0;
697 fdctrl->data_state = FD_STATE_CMD;
698 fdctrl->data_dir = FD_DIR_WRITE;
699 for (i = 0; i < MAX_FD; i++)
700 fd_reset(&fdctrl->drives[i]);
701 fdctrl_reset_fifo(fdctrl);
702 if (do_irq)
703 fdctrl_raise_irq(fdctrl, 0xc0);
704 }
705
706 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
707 {
708 return &fdctrl->drives[fdctrl->bootsel];
709 }
710
711 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
712 {
713 return &fdctrl->drives[1 - fdctrl->bootsel];
714 }
715
716 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
717 {
718 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
719 }
720
721 /* Status B register : 0x01 (read-only) */
722 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
723 {
724 FLOPPY_DPRINTF("status register: 0x00\n");
725 return 0;
726 }
727
728 /* Digital output register : 0x02 */
729 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
730 {
731 uint32_t retval = 0;
732
733 /* Drive motors state indicators */
734 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
735 retval |= 1 << 5;
736 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
737 retval |= 1 << 4;
738 /* DMA enable */
739 retval |= fdctrl->dma_en << 3;
740 /* Reset indicator */
741 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
742 /* Selected drive */
743 retval |= fdctrl->cur_drv;
744 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
745
746 return retval;
747 }
748
749 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
750 {
751 /* Reset mode */
752 if (fdctrl->state & FD_CTRL_RESET) {
753 if (!(value & 0x04)) {
754 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
755 return;
756 }
757 }
758 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
759 /* Drive motors state indicators */
760 if (value & 0x20)
761 fd_start(drv1(fdctrl));
762 else
763 fd_stop(drv1(fdctrl));
764 if (value & 0x10)
765 fd_start(drv0(fdctrl));
766 else
767 fd_stop(drv0(fdctrl));
768 /* DMA enable */
769 #if 0
770 if (fdctrl->dma_chann != -1)
771 fdctrl->dma_en = 1 - ((value >> 3) & 1);
772 #endif
773 /* Reset */
774 if (!(value & 0x04)) {
775 if (!(fdctrl->state & FD_CTRL_RESET)) {
776 FLOPPY_DPRINTF("controller enter RESET state\n");
777 fdctrl->state |= FD_CTRL_RESET;
778 }
779 } else {
780 if (fdctrl->state & FD_CTRL_RESET) {
781 FLOPPY_DPRINTF("controller out of RESET state\n");
782 fdctrl_reset(fdctrl, 1);
783 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
784 }
785 }
786 /* Selected drive */
787 fdctrl->cur_drv = value & 1;
788 }
789
790 /* Tape drive register : 0x03 */
791 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
792 {
793 uint32_t retval = 0;
794
795 /* Disk boot selection indicator */
796 retval |= fdctrl->bootsel << 2;
797 /* Tape indicators: never allowed */
798 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
799
800 return retval;
801 }
802
803 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
804 {
805 /* Reset mode */
806 if (fdctrl->state & FD_CTRL_RESET) {
807 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
808 return;
809 }
810 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
811 /* Disk boot selection indicator */
812 fdctrl->bootsel = (value >> 2) & 1;
813 /* Tape indicators: never allow */
814 }
815
816 /* Main status register : 0x04 (read) */
817 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
818 {
819 uint32_t retval = 0;
820
821 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
822 if (!(fdctrl->state & FD_CTRL_BUSY)) {
823 /* Data transfer allowed */
824 retval |= 0x80;
825 /* Data transfer direction indicator */
826 if (fdctrl->data_dir == FD_DIR_READ)
827 retval |= 0x40;
828 }
829 /* Should handle 0x20 for SPECIFY command */
830 /* Command busy indicator */
831 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
832 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
833 retval |= 0x10;
834 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
835
836 return retval;
837 }
838
839 /* Data select rate register : 0x04 (write) */
840 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
841 {
842 /* Reset mode */
843 if (fdctrl->state & FD_CTRL_RESET) {
844 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
845 return;
846 }
847 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
848 /* Reset: autoclear */
849 if (value & 0x80) {
850 fdctrl->state |= FD_CTRL_RESET;
851 fdctrl_reset(fdctrl, 1);
852 fdctrl->state &= ~FD_CTRL_RESET;
853 }
854 if (value & 0x40) {
855 fdctrl->state |= FD_CTRL_SLEEP;
856 fdctrl_reset(fdctrl, 1);
857 }
858 // fdctrl.precomp = (value >> 2) & 0x07;
859 }
860
861 static int fdctrl_media_changed(fdrive_t *drv)
862 {
863 int ret;
864
865 if (!drv->bs)
866 return 0;
867 ret = bdrv_media_changed(drv->bs);
868 if (ret) {
869 fd_revalidate(drv);
870 }
871 return ret;
872 }
873
874 /* Digital input register : 0x07 (read-only) */
875 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
876 {
877 uint32_t retval = 0;
878
879 if (fdctrl_media_changed(drv0(fdctrl)) ||
880 fdctrl_media_changed(drv1(fdctrl)))
881 retval |= 0x80;
882 if (retval != 0)
883 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
884
885 return retval;
886 }
887
888 /* FIFO state control */
889 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
890 {
891 fdctrl->data_dir = FD_DIR_WRITE;
892 fdctrl->data_pos = 0;
893 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
894 }
895
896 /* Set FIFO status for the host to read */
897 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
898 {
899 fdctrl->data_dir = FD_DIR_READ;
900 fdctrl->data_len = fifo_len;
901 fdctrl->data_pos = 0;
902 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
903 if (do_irq)
904 fdctrl_raise_irq(fdctrl, 0x00);
905 }
906
907 /* Set an error: unimplemented/unknown command */
908 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
909 {
910 #if 0
911 fdrive_t *cur_drv;
912
913 cur_drv = get_cur_drv(fdctrl);
914 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
915 fdctrl->fifo[1] = 0x00;
916 fdctrl->fifo[2] = 0x00;
917 fdctrl_set_fifo(fdctrl, 3, 1);
918 #else
919 // fdctrl_reset_fifo(fdctrl);
920 fdctrl->fifo[0] = 0x80;
921 fdctrl_set_fifo(fdctrl, 1, 0);
922 #endif
923 }
924
925 /* Callback for transfer end (stop or abort) */
926 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
927 uint8_t status1, uint8_t status2)
928 {
929 fdrive_t *cur_drv;
930
931 cur_drv = get_cur_drv(fdctrl);
932 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
933 status0, status1, status2,
934 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
935 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
936 fdctrl->fifo[1] = status1;
937 fdctrl->fifo[2] = status2;
938 fdctrl->fifo[3] = cur_drv->track;
939 fdctrl->fifo[4] = cur_drv->head;
940 fdctrl->fifo[5] = cur_drv->sect;
941 fdctrl->fifo[6] = FD_SECTOR_SC;
942 fdctrl->data_dir = FD_DIR_READ;
943 if (fdctrl->state & FD_CTRL_BUSY) {
944 DMA_release_DREQ(fdctrl->dma_chann);
945 fdctrl->state &= ~FD_CTRL_BUSY;
946 }
947 fdctrl_set_fifo(fdctrl, 7, 1);
948 }
949
950 /* Prepare a data transfer (either DMA or FIFO) */
951 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
952 {
953 fdrive_t *cur_drv;
954 uint8_t kh, kt, ks;
955 int did_seek;
956
957 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
958 cur_drv = get_cur_drv(fdctrl);
959 kt = fdctrl->fifo[2];
960 kh = fdctrl->fifo[3];
961 ks = fdctrl->fifo[4];
962 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
963 fdctrl->cur_drv, kh, kt, ks,
964 _fd_sector(kh, kt, ks, cur_drv->last_sect));
965 did_seek = 0;
966 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
967 case 2:
968 /* sect too big */
969 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
970 fdctrl->fifo[3] = kt;
971 fdctrl->fifo[4] = kh;
972 fdctrl->fifo[5] = ks;
973 return;
974 case 3:
975 /* track too big */
976 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
977 fdctrl->fifo[3] = kt;
978 fdctrl->fifo[4] = kh;
979 fdctrl->fifo[5] = ks;
980 return;
981 case 4:
982 /* No seek enabled */
983 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
984 fdctrl->fifo[3] = kt;
985 fdctrl->fifo[4] = kh;
986 fdctrl->fifo[5] = ks;
987 return;
988 case 1:
989 did_seek = 1;
990 break;
991 default:
992 break;
993 }
994 /* Set the FIFO state */
995 fdctrl->data_dir = direction;
996 fdctrl->data_pos = 0;
997 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
998 if (fdctrl->fifo[0] & 0x80)
999 fdctrl->data_state |= FD_STATE_MULTI;
1000 else
1001 fdctrl->data_state &= ~FD_STATE_MULTI;
1002 if (did_seek)
1003 fdctrl->data_state |= FD_STATE_SEEK;
1004 else
1005 fdctrl->data_state &= ~FD_STATE_SEEK;
1006 if (fdctrl->fifo[5] == 00) {
1007 fdctrl->data_len = fdctrl->fifo[8];
1008 } else {
1009 int tmp;
1010 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1011 tmp = (cur_drv->last_sect - ks + 1);
1012 if (fdctrl->fifo[0] & 0x80)
1013 tmp += cur_drv->last_sect;
1014 fdctrl->data_len *= tmp;
1015 }
1016 fdctrl->eot = fdctrl->fifo[6];
1017 if (fdctrl->dma_en) {
1018 int dma_mode;
1019 /* DMA transfer are enabled. Check if DMA channel is well programmed */
1020 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1021 dma_mode = (dma_mode >> 2) & 3;
1022 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1023 dma_mode, direction,
1024 (128 << fdctrl->fifo[5]) *
1025 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1026 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1027 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1028 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1029 (direction == FD_DIR_READ && dma_mode == 1)) {
1030 /* No access is allowed until DMA transfer has completed */
1031 fdctrl->state |= FD_CTRL_BUSY;
1032 /* Now, we just have to wait for the DMA controller to
1033 * recall us...
1034 */
1035 DMA_hold_DREQ(fdctrl->dma_chann);
1036 DMA_schedule(fdctrl->dma_chann);
1037 return;
1038 } else {
1039 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1040 }
1041 }
1042 FLOPPY_DPRINTF("start non-DMA transfer\n");
1043 /* IO based transfer: calculate len */
1044 fdctrl_raise_irq(fdctrl, 0x00);
1045
1046 return;
1047 }
1048
1049 /* Prepare a transfer of deleted data */
1050 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1051 {
1052 /* We don't handle deleted data,
1053 * so we don't return *ANYTHING*
1054 */
1055 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1056 }
1057
1058 /* handlers for DMA transfers */
1059 static int fdctrl_transfer_handler (void *opaque, int nchan,
1060 int dma_pos, int dma_len)
1061 {
1062 fdctrl_t *fdctrl;
1063 fdrive_t *cur_drv;
1064 int len, start_pos, rel_pos;
1065 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1066
1067 fdctrl = opaque;
1068 if (!(fdctrl->state & FD_CTRL_BUSY)) {
1069 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1070 return 0;
1071 }
1072 cur_drv = get_cur_drv(fdctrl);
1073 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1074 fdctrl->data_dir == FD_DIR_SCANH)
1075 status2 = 0x04;
1076 if (dma_len > fdctrl->data_len)
1077 dma_len = fdctrl->data_len;
1078 if (cur_drv->bs == NULL) {
1079 if (fdctrl->data_dir == FD_DIR_WRITE)
1080 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1081 else
1082 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1083 len = 0;
1084 goto transfer_error;
1085 }
1086 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1087 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1088 len = dma_len - fdctrl->data_pos;
1089 if (len + rel_pos > FD_SECTOR_LEN)
1090 len = FD_SECTOR_LEN - rel_pos;
1091 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1092 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1093 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1094 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1095 fd_sector(cur_drv) * 512);
1096 if (fdctrl->data_dir != FD_DIR_WRITE ||
1097 len < FD_SECTOR_LEN || rel_pos != 0) {
1098 /* READ & SCAN commands and realign to a sector for WRITE */
1099 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1100 fdctrl->fifo, 1) < 0) {
1101 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1102 fd_sector(cur_drv));
1103 /* Sure, image size is too small... */
1104 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1105 }
1106 }
1107 switch (fdctrl->data_dir) {
1108 case FD_DIR_READ:
1109 /* READ commands */
1110 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1111 fdctrl->data_pos, len);
1112 break;
1113 case FD_DIR_WRITE:
1114 /* WRITE commands */
1115 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1116 fdctrl->data_pos, len);
1117 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1118 fdctrl->fifo, 1) < 0) {
1119 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1120 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1121 goto transfer_error;
1122 }
1123 break;
1124 default:
1125 /* SCAN commands */
1126 {
1127 uint8_t tmpbuf[FD_SECTOR_LEN];
1128 int ret;
1129 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1130 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1131 if (ret == 0) {
1132 status2 = 0x08;
1133 goto end_transfer;
1134 }
1135 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1136 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1137 status2 = 0x00;
1138 goto end_transfer;
1139 }
1140 }
1141 break;
1142 }
1143 fdctrl->data_pos += len;
1144 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1145 if (rel_pos == 0) {
1146 /* Seek to next sector */
1147 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1148 cur_drv->head, cur_drv->track, cur_drv->sect,
1149 fd_sector(cur_drv),
1150 fdctrl->data_pos - len);
1151 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1152 error in fact */
1153 if (cur_drv->sect >= cur_drv->last_sect ||
1154 cur_drv->sect == fdctrl->eot) {
1155 cur_drv->sect = 1;
1156 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1157 if (cur_drv->head == 0 &&
1158 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1159 cur_drv->head = 1;
1160 } else {
1161 cur_drv->head = 0;
1162 cur_drv->track++;
1163 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1164 break;
1165 }
1166 } else {
1167 cur_drv->track++;
1168 break;
1169 }
1170 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1171 cur_drv->head, cur_drv->track,
1172 cur_drv->sect, fd_sector(cur_drv));
1173 } else {
1174 cur_drv->sect++;
1175 }
1176 }
1177 }
1178 end_transfer:
1179 len = fdctrl->data_pos - start_pos;
1180 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1181 fdctrl->data_pos, len, fdctrl->data_len);
1182 if (fdctrl->data_dir == FD_DIR_SCANE ||
1183 fdctrl->data_dir == FD_DIR_SCANL ||
1184 fdctrl->data_dir == FD_DIR_SCANH)
1185 status2 = 0x08;
1186 if (FD_DID_SEEK(fdctrl->data_state))
1187 status0 |= 0x20;
1188 fdctrl->data_len -= len;
1189 // if (fdctrl->data_len == 0)
1190 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1191 transfer_error:
1192
1193 return len;
1194 }
1195
1196 /* Data register : 0x05 */
1197 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1198 {
1199 fdrive_t *cur_drv;
1200 uint32_t retval = 0;
1201 int pos, len;
1202
1203 cur_drv = get_cur_drv(fdctrl);
1204 fdctrl->state &= ~FD_CTRL_SLEEP;
1205 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1206 FLOPPY_ERROR("can't read data in CMD state\n");
1207 return 0;
1208 }
1209 pos = fdctrl->data_pos;
1210 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1211 pos %= FD_SECTOR_LEN;
1212 if (pos == 0) {
1213 len = fdctrl->data_len - fdctrl->data_pos;
1214 if (len > FD_SECTOR_LEN)
1215 len = FD_SECTOR_LEN;
1216 bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1217 }
1218 }
1219 retval = fdctrl->fifo[pos];
1220 if (++fdctrl->data_pos == fdctrl->data_len) {
1221 fdctrl->data_pos = 0;
1222 /* Switch from transfer mode to status mode
1223 * then from status mode to command mode
1224 */
1225 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1226 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1227 } else {
1228 fdctrl_reset_fifo(fdctrl);
1229 fdctrl_reset_irq(fdctrl);
1230 }
1231 }
1232 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1233
1234 return retval;
1235 }
1236
1237 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1238 {
1239 fdrive_t *cur_drv;
1240 uint8_t kh, kt, ks;
1241 int did_seek;
1242
1243 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1244 cur_drv = get_cur_drv(fdctrl);
1245 kt = fdctrl->fifo[6];
1246 kh = fdctrl->fifo[7];
1247 ks = fdctrl->fifo[8];
1248 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1249 fdctrl->cur_drv, kh, kt, ks,
1250 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1251 did_seek = 0;
1252 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1253 case 2:
1254 /* sect too big */
1255 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1256 fdctrl->fifo[3] = kt;
1257 fdctrl->fifo[4] = kh;
1258 fdctrl->fifo[5] = ks;
1259 return;
1260 case 3:
1261 /* track too big */
1262 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1263 fdctrl->fifo[3] = kt;
1264 fdctrl->fifo[4] = kh;
1265 fdctrl->fifo[5] = ks;
1266 return;
1267 case 4:
1268 /* No seek enabled */
1269 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1270 fdctrl->fifo[3] = kt;
1271 fdctrl->fifo[4] = kh;
1272 fdctrl->fifo[5] = ks;
1273 return;
1274 case 1:
1275 did_seek = 1;
1276 fdctrl->data_state |= FD_STATE_SEEK;
1277 break;
1278 default:
1279 break;
1280 }
1281 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1282 if (cur_drv->bs == NULL ||
1283 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1284 FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1285 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1286 } else {
1287 if (cur_drv->sect == cur_drv->last_sect) {
1288 fdctrl->data_state &= ~FD_STATE_FORMAT;
1289 /* Last sector done */
1290 if (FD_DID_SEEK(fdctrl->data_state))
1291 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1292 else
1293 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1294 } else {
1295 /* More to do */
1296 fdctrl->data_pos = 0;
1297 fdctrl->data_len = 4;
1298 }
1299 }
1300 }
1301
1302 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1303 {
1304 fdrive_t *cur_drv;
1305
1306 cur_drv = get_cur_drv(fdctrl);
1307 /* Reset mode */
1308 if (fdctrl->state & FD_CTRL_RESET) {
1309 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1310 return;
1311 }
1312 fdctrl->state &= ~FD_CTRL_SLEEP;
1313 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1314 FLOPPY_ERROR("can't write data in status mode\n");
1315 return;
1316 }
1317 /* Is it write command time ? */
1318 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1319 /* FIFO data write */
1320 fdctrl->fifo[fdctrl->data_pos++] = value;
1321 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1322 fdctrl->data_pos == fdctrl->data_len) {
1323 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1324 }
1325 /* Switch from transfer mode to status mode
1326 * then from status mode to command mode
1327 */
1328 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1329 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1330 return;
1331 }
1332 if (fdctrl->data_pos == 0) {
1333 /* Command */
1334 switch (value & 0x5F) {
1335 case 0x46:
1336 /* READ variants */
1337 FLOPPY_DPRINTF("READ command\n");
1338 /* 8 parameters cmd */
1339 fdctrl->data_len = 9;
1340 goto enqueue;
1341 case 0x4C:
1342 /* READ_DELETED variants */
1343 FLOPPY_DPRINTF("READ_DELETED command\n");
1344 /* 8 parameters cmd */
1345 fdctrl->data_len = 9;
1346 goto enqueue;
1347 case 0x50:
1348 /* SCAN_EQUAL variants */
1349 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1350 /* 8 parameters cmd */
1351 fdctrl->data_len = 9;
1352 goto enqueue;
1353 case 0x56:
1354 /* VERIFY variants */
1355 FLOPPY_DPRINTF("VERIFY command\n");
1356 /* 8 parameters cmd */
1357 fdctrl->data_len = 9;
1358 goto enqueue;
1359 case 0x59:
1360 /* SCAN_LOW_OR_EQUAL variants */
1361 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1362 /* 8 parameters cmd */
1363 fdctrl->data_len = 9;
1364 goto enqueue;
1365 case 0x5D:
1366 /* SCAN_HIGH_OR_EQUAL variants */
1367 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1368 /* 8 parameters cmd */
1369 fdctrl->data_len = 9;
1370 goto enqueue;
1371 default:
1372 break;
1373 }
1374 switch (value & 0x7F) {
1375 case 0x45:
1376 /* WRITE variants */
1377 FLOPPY_DPRINTF("WRITE command\n");
1378 /* 8 parameters cmd */
1379 fdctrl->data_len = 9;
1380 goto enqueue;
1381 case 0x49:
1382 /* WRITE_DELETED variants */
1383 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1384 /* 8 parameters cmd */
1385 fdctrl->data_len = 9;
1386 goto enqueue;
1387 default:
1388 break;
1389 }
1390 switch (value) {
1391 case 0x03:
1392 /* SPECIFY */
1393 FLOPPY_DPRINTF("SPECIFY command\n");
1394 /* 1 parameter cmd */
1395 fdctrl->data_len = 3;
1396 goto enqueue;
1397 case 0x04:
1398 /* SENSE_DRIVE_STATUS */
1399 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1400 /* 1 parameter cmd */
1401 fdctrl->data_len = 2;
1402 goto enqueue;
1403 case 0x07:
1404 /* RECALIBRATE */
1405 FLOPPY_DPRINTF("RECALIBRATE command\n");
1406 /* 1 parameter cmd */
1407 fdctrl->data_len = 2;
1408 goto enqueue;
1409 case 0x08:
1410 /* SENSE_INTERRUPT_STATUS */
1411 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1412 fdctrl->int_status);
1413 /* No parameters cmd: returns status if no interrupt */
1414 #if 0
1415 fdctrl->fifo[0] =
1416 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1417 #else
1418 /* XXX: int_status handling is broken for read/write
1419 commands, so we do this hack. It should be suppressed
1420 ASAP */
1421 fdctrl->fifo[0] =
1422 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1423 #endif
1424 fdctrl->fifo[1] = cur_drv->track;
1425 fdctrl_set_fifo(fdctrl, 2, 0);
1426 fdctrl_reset_irq(fdctrl);
1427 fdctrl->int_status = 0xC0;
1428 return;
1429 case 0x0E:
1430 /* DUMPREG */
1431 FLOPPY_DPRINTF("DUMPREG command\n");
1432 /* Drives position */
1433 fdctrl->fifo[0] = drv0(fdctrl)->track;
1434 fdctrl->fifo[1] = drv1(fdctrl)->track;
1435 fdctrl->fifo[2] = 0;
1436 fdctrl->fifo[3] = 0;
1437 /* timers */
1438 fdctrl->fifo[4] = fdctrl->timer0;
1439 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1440 fdctrl->fifo[6] = cur_drv->last_sect;
1441 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1442 (cur_drv->perpendicular << 2);
1443 fdctrl->fifo[8] = fdctrl->config;
1444 fdctrl->fifo[9] = fdctrl->precomp_trk;
1445 fdctrl_set_fifo(fdctrl, 10, 0);
1446 return;
1447 case 0x0F:
1448 /* SEEK */
1449 FLOPPY_DPRINTF("SEEK command\n");
1450 /* 2 parameters cmd */
1451 fdctrl->data_len = 3;
1452 goto enqueue;
1453 case 0x10:
1454 /* VERSION */
1455 FLOPPY_DPRINTF("VERSION command\n");
1456 /* No parameters cmd */
1457 /* Controller's version */
1458 fdctrl->fifo[0] = fdctrl->version;
1459 fdctrl_set_fifo(fdctrl, 1, 1);
1460 return;
1461 case 0x12:
1462 /* PERPENDICULAR_MODE */
1463 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1464 /* 1 parameter cmd */
1465 fdctrl->data_len = 2;
1466 goto enqueue;
1467 case 0x13:
1468 /* CONFIGURE */
1469 FLOPPY_DPRINTF("CONFIGURE command\n");
1470 /* 3 parameters cmd */
1471 fdctrl->data_len = 4;
1472 goto enqueue;
1473 case 0x14:
1474 /* UNLOCK */
1475 FLOPPY_DPRINTF("UNLOCK command\n");
1476 /* No parameters cmd */
1477 fdctrl->lock = 0;
1478 fdctrl->fifo[0] = 0;
1479 fdctrl_set_fifo(fdctrl, 1, 0);
1480 return;
1481 case 0x17:
1482 /* POWERDOWN_MODE */
1483 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1484 /* 2 parameters cmd */
1485 fdctrl->data_len = 3;
1486 goto enqueue;
1487 case 0x18:
1488 /* PART_ID */
1489 FLOPPY_DPRINTF("PART_ID command\n");
1490 /* No parameters cmd */
1491 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1492 fdctrl_set_fifo(fdctrl, 1, 0);
1493 return;
1494 case 0x2C:
1495 /* SAVE */
1496 FLOPPY_DPRINTF("SAVE command\n");
1497 /* No parameters cmd */
1498 fdctrl->fifo[0] = 0;
1499 fdctrl->fifo[1] = 0;
1500 /* Drives position */
1501 fdctrl->fifo[2] = drv0(fdctrl)->track;
1502 fdctrl->fifo[3] = drv1(fdctrl)->track;
1503 fdctrl->fifo[4] = 0;
1504 fdctrl->fifo[5] = 0;
1505 /* timers */
1506 fdctrl->fifo[6] = fdctrl->timer0;
1507 fdctrl->fifo[7] = fdctrl->timer1;
1508 fdctrl->fifo[8] = cur_drv->last_sect;
1509 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1510 (cur_drv->perpendicular << 2);
1511 fdctrl->fifo[10] = fdctrl->config;
1512 fdctrl->fifo[11] = fdctrl->precomp_trk;
1513 fdctrl->fifo[12] = fdctrl->pwrd;
1514 fdctrl->fifo[13] = 0;
1515 fdctrl->fifo[14] = 0;
1516 fdctrl_set_fifo(fdctrl, 15, 1);
1517 return;
1518 case 0x33:
1519 /* OPTION */
1520 FLOPPY_DPRINTF("OPTION command\n");
1521 /* 1 parameter cmd */
1522 fdctrl->data_len = 2;
1523 goto enqueue;
1524 case 0x42:
1525 /* READ_TRACK */
1526 FLOPPY_DPRINTF("READ_TRACK command\n");
1527 /* 8 parameters cmd */
1528 fdctrl->data_len = 9;
1529 goto enqueue;
1530 case 0x4A:
1531 /* READ_ID */
1532 FLOPPY_DPRINTF("READ_ID command\n");
1533 /* 1 parameter cmd */
1534 fdctrl->data_len = 2;
1535 goto enqueue;
1536 case 0x4C:
1537 /* RESTORE */
1538 FLOPPY_DPRINTF("RESTORE command\n");
1539 /* 17 parameters cmd */
1540 fdctrl->data_len = 18;
1541 goto enqueue;
1542 case 0x4D:
1543 /* FORMAT_TRACK */
1544 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1545 /* 5 parameters cmd */
1546 fdctrl->data_len = 6;
1547 goto enqueue;
1548 case 0x8E:
1549 /* DRIVE_SPECIFICATION_COMMAND */
1550 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1551 /* 5 parameters cmd */
1552 fdctrl->data_len = 6;
1553 goto enqueue;
1554 case 0x8F:
1555 /* RELATIVE_SEEK_OUT */
1556 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1557 /* 2 parameters cmd */
1558 fdctrl->data_len = 3;
1559 goto enqueue;
1560 case 0x94:
1561 /* LOCK */
1562 FLOPPY_DPRINTF("LOCK command\n");
1563 /* No parameters cmd */
1564 fdctrl->lock = 1;
1565 fdctrl->fifo[0] = 0x10;
1566 fdctrl_set_fifo(fdctrl, 1, 1);
1567 return;
1568 case 0xCD:
1569 /* FORMAT_AND_WRITE */
1570 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1571 /* 10 parameters cmd */
1572 fdctrl->data_len = 11;
1573 goto enqueue;
1574 case 0xCF:
1575 /* RELATIVE_SEEK_IN */
1576 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1577 /* 2 parameters cmd */
1578 fdctrl->data_len = 3;
1579 goto enqueue;
1580 default:
1581 /* Unknown command */
1582 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1583 fdctrl_unimplemented(fdctrl);
1584 return;
1585 }
1586 }
1587 enqueue:
1588 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1589 fdctrl->fifo[fdctrl->data_pos] = value;
1590 if (++fdctrl->data_pos == fdctrl->data_len) {
1591 /* We now have all parameters
1592 * and will be able to treat the command
1593 */
1594 if (fdctrl->data_state & FD_STATE_FORMAT) {
1595 fdctrl_format_sector(fdctrl);
1596 return;
1597 }
1598 switch (fdctrl->fifo[0] & 0x1F) {
1599 case 0x06:
1600 {
1601 /* READ variants */
1602 FLOPPY_DPRINTF("treat READ command\n");
1603 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1604 return;
1605 }
1606 case 0x0C:
1607 /* READ_DELETED variants */
1608 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1609 FLOPPY_ERROR("treat READ_DELETED command\n");
1610 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1611 return;
1612 case 0x16:
1613 /* VERIFY variants */
1614 // FLOPPY_DPRINTF("treat VERIFY command\n");
1615 FLOPPY_ERROR("treat VERIFY command\n");
1616 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1617 return;
1618 case 0x10:
1619 /* SCAN_EQUAL variants */
1620 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1621 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1622 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1623 return;
1624 case 0x19:
1625 /* SCAN_LOW_OR_EQUAL variants */
1626 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1627 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1628 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1629 return;
1630 case 0x1D:
1631 /* SCAN_HIGH_OR_EQUAL variants */
1632 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1633 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1634 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1635 return;
1636 default:
1637 break;
1638 }
1639 switch (fdctrl->fifo[0] & 0x3F) {
1640 case 0x05:
1641 /* WRITE variants */
1642 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1643 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1644 return;
1645 case 0x09:
1646 /* WRITE_DELETED variants */
1647 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1648 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1649 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1650 return;
1651 default:
1652 break;
1653 }
1654 switch (fdctrl->fifo[0]) {
1655 case 0x03:
1656 /* SPECIFY */
1657 FLOPPY_DPRINTF("treat SPECIFY command\n");
1658 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1659 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1660 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1661 /* No result back */
1662 fdctrl_reset_fifo(fdctrl);
1663 break;
1664 case 0x04:
1665 /* SENSE_DRIVE_STATUS */
1666 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1667 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1668 cur_drv = get_cur_drv(fdctrl);
1669 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1670 /* 1 Byte status back */
1671 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1672 (cur_drv->track == 0 ? 0x10 : 0x00) |
1673 (cur_drv->head << 2) |
1674 fdctrl->cur_drv |
1675 0x28;
1676 fdctrl_set_fifo(fdctrl, 1, 0);
1677 break;
1678 case 0x07:
1679 /* RECALIBRATE */
1680 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1681 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1682 cur_drv = get_cur_drv(fdctrl);
1683 fd_recalibrate(cur_drv);
1684 fdctrl_reset_fifo(fdctrl);
1685 /* Raise Interrupt */
1686 fdctrl_raise_irq(fdctrl, 0x20);
1687 break;
1688 case 0x0F:
1689 /* SEEK */
1690 FLOPPY_DPRINTF("treat SEEK command\n");
1691 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1692 cur_drv = get_cur_drv(fdctrl);
1693 fd_start(cur_drv);
1694 if (fdctrl->fifo[2] <= cur_drv->track)
1695 cur_drv->dir = 1;
1696 else
1697 cur_drv->dir = 0;
1698 fdctrl_reset_fifo(fdctrl);
1699 if (fdctrl->fifo[2] > cur_drv->max_track) {
1700 fdctrl_raise_irq(fdctrl, 0x60);
1701 } else {
1702 cur_drv->track = fdctrl->fifo[2];
1703 /* Raise Interrupt */
1704 fdctrl_raise_irq(fdctrl, 0x20);
1705 }
1706 break;
1707 case 0x12:
1708 /* PERPENDICULAR_MODE */
1709 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1710 if (fdctrl->fifo[1] & 0x80)
1711 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1712 /* No result back */
1713 fdctrl_reset_fifo(fdctrl);
1714 break;
1715 case 0x13:
1716 /* CONFIGURE */
1717 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1718 fdctrl->config = fdctrl->fifo[2];
1719 fdctrl->precomp_trk = fdctrl->fifo[3];
1720 /* No result back */
1721 fdctrl_reset_fifo(fdctrl);
1722 break;
1723 case 0x17:
1724 /* POWERDOWN_MODE */
1725 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1726 fdctrl->pwrd = fdctrl->fifo[1];
1727 fdctrl->fifo[0] = fdctrl->fifo[1];
1728 fdctrl_set_fifo(fdctrl, 1, 1);
1729 break;
1730 case 0x33:
1731 /* OPTION */
1732 FLOPPY_DPRINTF("treat OPTION command\n");
1733 /* No result back */
1734 fdctrl_reset_fifo(fdctrl);
1735 break;
1736 case 0x42:
1737 /* READ_TRACK */
1738 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1739 FLOPPY_ERROR("treat READ_TRACK command\n");
1740 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1741 break;
1742 case 0x4A:
1743 /* READ_ID */
1744 FLOPPY_DPRINTF("treat READ_ID command\n");
1745 /* XXX: should set main status register to busy */
1746 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1747 qemu_mod_timer(fdctrl->result_timer,
1748 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1749 break;
1750 case 0x4C:
1751 /* RESTORE */
1752 FLOPPY_DPRINTF("treat RESTORE command\n");
1753 /* Drives position */
1754 drv0(fdctrl)->track = fdctrl->fifo[3];
1755 drv1(fdctrl)->track = fdctrl->fifo[4];
1756 /* timers */
1757 fdctrl->timer0 = fdctrl->fifo[7];
1758 fdctrl->timer1 = fdctrl->fifo[8];
1759 cur_drv->last_sect = fdctrl->fifo[9];
1760 fdctrl->lock = fdctrl->fifo[10] >> 7;
1761 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1762 fdctrl->config = fdctrl->fifo[11];
1763 fdctrl->precomp_trk = fdctrl->fifo[12];
1764 fdctrl->pwrd = fdctrl->fifo[13];
1765 fdctrl_reset_fifo(fdctrl);
1766 break;
1767 case 0x4D:
1768 /* FORMAT_TRACK */
1769 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1770 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1771 cur_drv = get_cur_drv(fdctrl);
1772 fdctrl->data_state |= FD_STATE_FORMAT;
1773 if (fdctrl->fifo[0] & 0x80)
1774 fdctrl->data_state |= FD_STATE_MULTI;
1775 else
1776 fdctrl->data_state &= ~FD_STATE_MULTI;
1777 fdctrl->data_state &= ~FD_STATE_SEEK;
1778 cur_drv->bps =
1779 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1780 #if 0
1781 cur_drv->last_sect =
1782 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1783 fdctrl->fifo[3] / 2;
1784 #else
1785 cur_drv->last_sect = fdctrl->fifo[3];
1786 #endif
1787 /* TODO: implement format using DMA expected by the Bochs BIOS
1788 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1789 * the sector with the specified fill byte
1790 */
1791 fdctrl->data_state &= ~FD_STATE_FORMAT;
1792 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1793 break;
1794 case 0x8E:
1795 /* DRIVE_SPECIFICATION_COMMAND */
1796 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1797 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1798 /* Command parameters done */
1799 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1800 fdctrl->fifo[0] = fdctrl->fifo[1];
1801 fdctrl->fifo[2] = 0;
1802 fdctrl->fifo[3] = 0;
1803 fdctrl_set_fifo(fdctrl, 4, 1);
1804 } else {
1805 fdctrl_reset_fifo(fdctrl);
1806 }
1807 } else if (fdctrl->data_len > 7) {
1808 /* ERROR */
1809 fdctrl->fifo[0] = 0x80 |
1810 (cur_drv->head << 2) | fdctrl->cur_drv;
1811 fdctrl_set_fifo(fdctrl, 1, 1);
1812 }
1813 break;
1814 case 0x8F:
1815 /* RELATIVE_SEEK_OUT */
1816 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1817 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1818 cur_drv = get_cur_drv(fdctrl);
1819 fd_start(cur_drv);
1820 cur_drv->dir = 0;
1821 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1822 cur_drv->track = cur_drv->max_track - 1;
1823 } else {
1824 cur_drv->track += fdctrl->fifo[2];
1825 }
1826 fdctrl_reset_fifo(fdctrl);
1827 fdctrl_raise_irq(fdctrl, 0x20);
1828 break;
1829 case 0xCD:
1830 /* FORMAT_AND_WRITE */
1831 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1832 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1833 fdctrl_unimplemented(fdctrl);
1834 break;
1835 case 0xCF:
1836 /* RELATIVE_SEEK_IN */
1837 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1838 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1839 cur_drv = get_cur_drv(fdctrl);
1840 fd_start(cur_drv);
1841 cur_drv->dir = 1;
1842 if (fdctrl->fifo[2] > cur_drv->track) {
1843 cur_drv->track = 0;
1844 } else {
1845 cur_drv->track -= fdctrl->fifo[2];
1846 }
1847 fdctrl_reset_fifo(fdctrl);
1848 /* Raise Interrupt */
1849 fdctrl_raise_irq(fdctrl, 0x20);
1850 break;
1851 }
1852 }
1853 }
1854
1855 static void fdctrl_result_timer(void *opaque)
1856 {
1857 fdctrl_t *fdctrl = opaque;
1858 fdrive_t *cur_drv = get_cur_drv(fdctrl);
1859
1860 /* Pretend we are spinning.
1861 * This is needed for Coherent, which uses READ ID to check for
1862 * sector interleaving.
1863 */
1864 if (cur_drv->last_sect != 0) {
1865 cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
1866 }
1867 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1868 }
Qemu copy for testing