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Add Powerpc 440 board model "bamboo"
[qemu-kvm/fedora.git] / hw / fdc.c
blobd6897654dfc56a8a6a1f5bfc3a4ca2f6e9ba0ce4
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 uint64_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;
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->fifo = qemu_memalign(512, FD_SECTOR_LEN);
602 if (fdctrl->fifo == NULL) {
603 qemu_free(fdctrl);
604 return NULL;
605 }
606 fdctrl->result_timer = qemu_new_timer(vm_clock,
607 fdctrl_result_timer, fdctrl);
608
609 fdctrl->version = 0x90; /* Intel 82078 controller */
610 fdctrl->irq = irq;
611 fdctrl->dma_chann = dma_chann;
612 fdctrl->io_base = io_base;
613 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
614 fdctrl->sun4m = 0;
615 if (fdctrl->dma_chann != -1) {
616 fdctrl->dma_en = 1;
617 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
618 } else {
619 fdctrl->dma_en = 0;
620 }
621 for (i = 0; i < 2; i++) {
622 fd_init(&fdctrl->drives[i], fds[i]);
623 }
624 fdctrl_reset(fdctrl, 0);
625 fdctrl->state = FD_CTRL_ACTIVE;
626 if (mem_mapped) {
627 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
628 fdctrl);
629 cpu_register_physical_memory(io_base, 0x08, io_mem);
630 } else {
631 register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read,
632 fdctrl);
633 register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read,
634 fdctrl);
635 register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write,
636 fdctrl);
637 register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write,
638 fdctrl);
639 }
640 register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl);
641 qemu_register_reset(fdctrl_external_reset, fdctrl);
642 for (i = 0; i < 2; i++) {
643 fd_revalidate(&fdctrl->drives[i]);
644 }
645
646 return fdctrl;
647 }
648
649 fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base,
650 BlockDriverState **fds)
651 {
652 fdctrl_t *fdctrl;
653
654 fdctrl = fdctrl_init(irq, 0, 1, io_base, fds);
655 fdctrl->sun4m = 1;
656
657 return fdctrl;
658 }
659
660 /* XXX: may change if moved to bdrv */
661 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
662 {
663 return fdctrl->drives[drive_num].drive;
664 }
665
666 /* Change IRQ state */
667 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
668 {
669 FLOPPY_DPRINTF("Reset interrupt\n");
670 qemu_set_irq(fdctrl->irq, 0);
671 fdctrl->state &= ~FD_CTRL_INTR;
672 }
673
674 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
675 {
676 // Sparc mutation
677 if (fdctrl->sun4m && !fdctrl->dma_en) {
678 fdctrl->state &= ~FD_CTRL_BUSY;
679 fdctrl->int_status = status;
680 return;
681 }
682 if (~(fdctrl->state & FD_CTRL_INTR)) {
683 qemu_set_irq(fdctrl->irq, 1);
684 fdctrl->state |= FD_CTRL_INTR;
685 }
686 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
687 fdctrl->int_status = status;
688 }
689
690 /* Reset controller */
691 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
692 {
693 int i;
694
695 FLOPPY_DPRINTF("reset controller\n");
696 fdctrl_reset_irq(fdctrl);
697 /* Initialise controller */
698 fdctrl->cur_drv = 0;
699 /* FIFO state */
700 fdctrl->data_pos = 0;
701 fdctrl->data_len = 0;
702 fdctrl->data_state = FD_STATE_CMD;
703 fdctrl->data_dir = FD_DIR_WRITE;
704 for (i = 0; i < MAX_FD; i++)
705 fd_reset(&fdctrl->drives[i]);
706 fdctrl_reset_fifo(fdctrl);
707 if (do_irq)
708 fdctrl_raise_irq(fdctrl, 0xc0);
709 }
710
711 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
712 {
713 return &fdctrl->drives[fdctrl->bootsel];
714 }
715
716 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
717 {
718 return &fdctrl->drives[1 - fdctrl->bootsel];
719 }
720
721 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
722 {
723 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
724 }
725
726 /* Status B register : 0x01 (read-only) */
727 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
728 {
729 FLOPPY_DPRINTF("status register: 0x00\n");
730 return 0;
731 }
732
733 /* Digital output register : 0x02 */
734 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
735 {
736 uint32_t retval = 0;
737
738 /* Drive motors state indicators */
739 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
740 retval |= 1 << 5;
741 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
742 retval |= 1 << 4;
743 /* DMA enable */
744 retval |= fdctrl->dma_en << 3;
745 /* Reset indicator */
746 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
747 /* Selected drive */
748 retval |= fdctrl->cur_drv;
749 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
750
751 return retval;
752 }
753
754 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
755 {
756 /* Reset mode */
757 if (fdctrl->state & FD_CTRL_RESET) {
758 if (!(value & 0x04)) {
759 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
760 return;
761 }
762 }
763 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
764 /* Drive motors state indicators */
765 if (value & 0x20)
766 fd_start(drv1(fdctrl));
767 else
768 fd_stop(drv1(fdctrl));
769 if (value & 0x10)
770 fd_start(drv0(fdctrl));
771 else
772 fd_stop(drv0(fdctrl));
773 /* DMA enable */
774 #if 0
775 if (fdctrl->dma_chann != -1)
776 fdctrl->dma_en = 1 - ((value >> 3) & 1);
777 #endif
778 /* Reset */
779 if (!(value & 0x04)) {
780 if (!(fdctrl->state & FD_CTRL_RESET)) {
781 FLOPPY_DPRINTF("controller enter RESET state\n");
782 fdctrl->state |= FD_CTRL_RESET;
783 }
784 } else {
785 if (fdctrl->state & FD_CTRL_RESET) {
786 FLOPPY_DPRINTF("controller out of RESET state\n");
787 fdctrl_reset(fdctrl, 1);
788 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
789 }
790 }
791 /* Selected drive */
792 fdctrl->cur_drv = value & 1;
793 }
794
795 /* Tape drive register : 0x03 */
796 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
797 {
798 uint32_t retval = 0;
799
800 /* Disk boot selection indicator */
801 retval |= fdctrl->bootsel << 2;
802 /* Tape indicators: never allowed */
803 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
804
805 return retval;
806 }
807
808 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
809 {
810 /* Reset mode */
811 if (fdctrl->state & FD_CTRL_RESET) {
812 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
813 return;
814 }
815 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
816 /* Disk boot selection indicator */
817 fdctrl->bootsel = (value >> 2) & 1;
818 /* Tape indicators: never allow */
819 }
820
821 /* Main status register : 0x04 (read) */
822 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
823 {
824 uint32_t retval = 0;
825
826 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
827 if (!(fdctrl->state & FD_CTRL_BUSY)) {
828 /* Data transfer allowed */
829 retval |= 0x80;
830 /* Data transfer direction indicator */
831 if (fdctrl->data_dir == FD_DIR_READ)
832 retval |= 0x40;
833 }
834 /* Should handle 0x20 for SPECIFY command */
835 /* Command busy indicator */
836 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
837 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
838 retval |= 0x10;
839 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
840
841 return retval;
842 }
843
844 /* Data select rate register : 0x04 (write) */
845 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
846 {
847 /* Reset mode */
848 if (fdctrl->state & FD_CTRL_RESET) {
849 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
850 return;
851 }
852 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
853 /* Reset: autoclear */
854 if (value & 0x80) {
855 fdctrl->state |= FD_CTRL_RESET;
856 fdctrl_reset(fdctrl, 1);
857 fdctrl->state &= ~FD_CTRL_RESET;
858 }
859 if (value & 0x40) {
860 fdctrl->state |= FD_CTRL_SLEEP;
861 fdctrl_reset(fdctrl, 1);
862 }
863 // fdctrl.precomp = (value >> 2) & 0x07;
864 }
865
866 static int fdctrl_media_changed(fdrive_t *drv)
867 {
868 int ret;
869
870 if (!drv->bs)
871 return 0;
872 ret = bdrv_media_changed(drv->bs);
873 if (ret) {
874 fd_revalidate(drv);
875 }
876 return ret;
877 }
878
879 /* Digital input register : 0x07 (read-only) */
880 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
881 {
882 uint32_t retval = 0;
883
884 if (fdctrl_media_changed(drv0(fdctrl)) ||
885 fdctrl_media_changed(drv1(fdctrl)))
886 retval |= 0x80;
887 if (retval != 0)
888 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
889
890 return retval;
891 }
892
893 /* FIFO state control */
894 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
895 {
896 fdctrl->data_dir = FD_DIR_WRITE;
897 fdctrl->data_pos = 0;
898 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
899 }
900
901 /* Set FIFO status for the host to read */
902 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
903 {
904 fdctrl->data_dir = FD_DIR_READ;
905 fdctrl->data_len = fifo_len;
906 fdctrl->data_pos = 0;
907 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
908 if (do_irq)
909 fdctrl_raise_irq(fdctrl, 0x00);
910 }
911
912 /* Set an error: unimplemented/unknown command */
913 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
914 {
915 #if 0
916 fdrive_t *cur_drv;
917
918 cur_drv = get_cur_drv(fdctrl);
919 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
920 fdctrl->fifo[1] = 0x00;
921 fdctrl->fifo[2] = 0x00;
922 fdctrl_set_fifo(fdctrl, 3, 1);
923 #else
924 // fdctrl_reset_fifo(fdctrl);
925 fdctrl->fifo[0] = 0x80;
926 fdctrl_set_fifo(fdctrl, 1, 0);
927 #endif
928 }
929
930 /* Callback for transfer end (stop or abort) */
931 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
932 uint8_t status1, uint8_t status2)
933 {
934 fdrive_t *cur_drv;
935
936 cur_drv = get_cur_drv(fdctrl);
937 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
938 status0, status1, status2,
939 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
940 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
941 fdctrl->fifo[1] = status1;
942 fdctrl->fifo[2] = status2;
943 fdctrl->fifo[3] = cur_drv->track;
944 fdctrl->fifo[4] = cur_drv->head;
945 fdctrl->fifo[5] = cur_drv->sect;
946 fdctrl->fifo[6] = FD_SECTOR_SC;
947 fdctrl->data_dir = FD_DIR_READ;
948 if (fdctrl->state & FD_CTRL_BUSY) {
949 DMA_release_DREQ(fdctrl->dma_chann);
950 fdctrl->state &= ~FD_CTRL_BUSY;
951 }
952 fdctrl_set_fifo(fdctrl, 7, 1);
953 }
954
955 /* Prepare a data transfer (either DMA or FIFO) */
956 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
957 {
958 fdrive_t *cur_drv;
959 uint8_t kh, kt, ks;
960 int did_seek;
961
962 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
963 cur_drv = get_cur_drv(fdctrl);
964 kt = fdctrl->fifo[2];
965 kh = fdctrl->fifo[3];
966 ks = fdctrl->fifo[4];
967 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
968 fdctrl->cur_drv, kh, kt, ks,
969 _fd_sector(kh, kt, ks, cur_drv->last_sect));
970 did_seek = 0;
971 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
972 case 2:
973 /* sect too big */
974 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
975 fdctrl->fifo[3] = kt;
976 fdctrl->fifo[4] = kh;
977 fdctrl->fifo[5] = ks;
978 return;
979 case 3:
980 /* track too big */
981 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
982 fdctrl->fifo[3] = kt;
983 fdctrl->fifo[4] = kh;
984 fdctrl->fifo[5] = ks;
985 return;
986 case 4:
987 /* No seek enabled */
988 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
989 fdctrl->fifo[3] = kt;
990 fdctrl->fifo[4] = kh;
991 fdctrl->fifo[5] = ks;
992 return;
993 case 1:
994 did_seek = 1;
995 break;
996 default:
997 break;
998 }
999 /* Set the FIFO state */
1000 fdctrl->data_dir = direction;
1001 fdctrl->data_pos = 0;
1002 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
1003 if (fdctrl->fifo[0] & 0x80)
1004 fdctrl->data_state |= FD_STATE_MULTI;
1005 else
1006 fdctrl->data_state &= ~FD_STATE_MULTI;
1007 if (did_seek)
1008 fdctrl->data_state |= FD_STATE_SEEK;
1009 else
1010 fdctrl->data_state &= ~FD_STATE_SEEK;
1011 if (fdctrl->fifo[5] == 00) {
1012 fdctrl->data_len = fdctrl->fifo[8];
1013 } else {
1014 int tmp;
1015 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1016 tmp = (cur_drv->last_sect - ks + 1);
1017 if (fdctrl->fifo[0] & 0x80)
1018 tmp += cur_drv->last_sect;
1019 fdctrl->data_len *= tmp;
1020 }
1021 fdctrl->eot = fdctrl->fifo[6];
1022 if (fdctrl->dma_en) {
1023 int dma_mode;
1024 /* DMA transfer are enabled. Check if DMA channel is well programmed */
1025 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1026 dma_mode = (dma_mode >> 2) & 3;
1027 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1028 dma_mode, direction,
1029 (128 << fdctrl->fifo[5]) *
1030 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1031 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1032 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1033 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1034 (direction == FD_DIR_READ && dma_mode == 1)) {
1035 /* No access is allowed until DMA transfer has completed */
1036 fdctrl->state |= FD_CTRL_BUSY;
1037 /* Now, we just have to wait for the DMA controller to
1038 * recall us...
1039 */
1040 DMA_hold_DREQ(fdctrl->dma_chann);
1041 DMA_schedule(fdctrl->dma_chann);
1042 return;
1043 } else {
1044 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1045 }
1046 }
1047 FLOPPY_DPRINTF("start non-DMA transfer\n");
1048 /* IO based transfer: calculate len */
1049 fdctrl_raise_irq(fdctrl, 0x00);
1050
1051 return;
1052 }
1053
1054 /* Prepare a transfer of deleted data */
1055 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1056 {
1057 /* We don't handle deleted data,
1058 * so we don't return *ANYTHING*
1059 */
1060 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1061 }
1062
1063 /* handlers for DMA transfers */
1064 static int fdctrl_transfer_handler (void *opaque, int nchan,
1065 int dma_pos, int dma_len)
1066 {
1067 fdctrl_t *fdctrl;
1068 fdrive_t *cur_drv;
1069 int len, start_pos, rel_pos;
1070 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1071
1072 fdctrl = opaque;
1073 if (!(fdctrl->state & FD_CTRL_BUSY)) {
1074 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1075 return 0;
1076 }
1077 cur_drv = get_cur_drv(fdctrl);
1078 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1079 fdctrl->data_dir == FD_DIR_SCANH)
1080 status2 = 0x04;
1081 if (dma_len > fdctrl->data_len)
1082 dma_len = fdctrl->data_len;
1083 if (cur_drv->bs == NULL) {
1084 if (fdctrl->data_dir == FD_DIR_WRITE)
1085 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1086 else
1087 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1088 len = 0;
1089 goto transfer_error;
1090 }
1091 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1092 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1093 len = dma_len - fdctrl->data_pos;
1094 if (len + rel_pos > FD_SECTOR_LEN)
1095 len = FD_SECTOR_LEN - rel_pos;
1096 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1097 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1098 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1099 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1100 fd_sector(cur_drv) * 512);
1101 if (fdctrl->data_dir != FD_DIR_WRITE ||
1102 len < FD_SECTOR_LEN || rel_pos != 0) {
1103 /* READ & SCAN commands and realign to a sector for WRITE */
1104 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1105 fdctrl->fifo, 1) < 0) {
1106 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1107 fd_sector(cur_drv));
1108 /* Sure, image size is too small... */
1109 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1110 }
1111 }
1112 switch (fdctrl->data_dir) {
1113 case FD_DIR_READ:
1114 /* READ commands */
1115 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1116 fdctrl->data_pos, len);
1117 break;
1118 case FD_DIR_WRITE:
1119 /* WRITE commands */
1120 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1121 fdctrl->data_pos, len);
1122 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1123 fdctrl->fifo, 1) < 0) {
1124 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1125 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1126 goto transfer_error;
1127 }
1128 break;
1129 default:
1130 /* SCAN commands */
1131 {
1132 uint8_t tmpbuf[FD_SECTOR_LEN];
1133 int ret;
1134 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1135 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1136 if (ret == 0) {
1137 status2 = 0x08;
1138 goto end_transfer;
1139 }
1140 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1141 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1142 status2 = 0x00;
1143 goto end_transfer;
1144 }
1145 }
1146 break;
1147 }
1148 fdctrl->data_pos += len;
1149 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1150 if (rel_pos == 0) {
1151 /* Seek to next sector */
1152 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1153 cur_drv->head, cur_drv->track, cur_drv->sect,
1154 fd_sector(cur_drv),
1155 fdctrl->data_pos - len);
1156 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1157 error in fact */
1158 if (cur_drv->sect >= cur_drv->last_sect ||
1159 cur_drv->sect == fdctrl->eot) {
1160 cur_drv->sect = 1;
1161 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1162 if (cur_drv->head == 0 &&
1163 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1164 cur_drv->head = 1;
1165 } else {
1166 cur_drv->head = 0;
1167 cur_drv->track++;
1168 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1169 break;
1170 }
1171 } else {
1172 cur_drv->track++;
1173 break;
1174 }
1175 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1176 cur_drv->head, cur_drv->track,
1177 cur_drv->sect, fd_sector(cur_drv));
1178 } else {
1179 cur_drv->sect++;
1180 }
1181 }
1182 }
1183 end_transfer:
1184 len = fdctrl->data_pos - start_pos;
1185 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1186 fdctrl->data_pos, len, fdctrl->data_len);
1187 if (fdctrl->data_dir == FD_DIR_SCANE ||
1188 fdctrl->data_dir == FD_DIR_SCANL ||
1189 fdctrl->data_dir == FD_DIR_SCANH)
1190 status2 = 0x08;
1191 if (FD_DID_SEEK(fdctrl->data_state))
1192 status0 |= 0x20;
1193 fdctrl->data_len -= len;
1194 // if (fdctrl->data_len == 0)
1195 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1196 transfer_error:
1197
1198 return len;
1199 }
1200
1201 /* Data register : 0x05 */
1202 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1203 {
1204 fdrive_t *cur_drv;
1205 uint32_t retval = 0;
1206 int pos, len;
1207
1208 cur_drv = get_cur_drv(fdctrl);
1209 fdctrl->state &= ~FD_CTRL_SLEEP;
1210 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1211 FLOPPY_ERROR("can't read data in CMD state\n");
1212 return 0;
1213 }
1214 pos = fdctrl->data_pos;
1215 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1216 pos %= FD_SECTOR_LEN;
1217 if (pos == 0) {
1218 len = fdctrl->data_len - fdctrl->data_pos;
1219 if (len > FD_SECTOR_LEN)
1220 len = FD_SECTOR_LEN;
1221 bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1222 }
1223 }
1224 retval = fdctrl->fifo[pos];
1225 if (++fdctrl->data_pos == fdctrl->data_len) {
1226 fdctrl->data_pos = 0;
1227 /* Switch from transfer mode to status mode
1228 * then from status mode to command mode
1229 */
1230 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1231 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1232 } else {
1233 fdctrl_reset_fifo(fdctrl);
1234 fdctrl_reset_irq(fdctrl);
1235 }
1236 }
1237 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1238
1239 return retval;
1240 }
1241
1242 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1243 {
1244 fdrive_t *cur_drv;
1245 uint8_t kh, kt, ks;
1246 int did_seek;
1247
1248 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1249 cur_drv = get_cur_drv(fdctrl);
1250 kt = fdctrl->fifo[6];
1251 kh = fdctrl->fifo[7];
1252 ks = fdctrl->fifo[8];
1253 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1254 fdctrl->cur_drv, kh, kt, ks,
1255 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1256 did_seek = 0;
1257 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1258 case 2:
1259 /* sect too big */
1260 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1261 fdctrl->fifo[3] = kt;
1262 fdctrl->fifo[4] = kh;
1263 fdctrl->fifo[5] = ks;
1264 return;
1265 case 3:
1266 /* track too big */
1267 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1268 fdctrl->fifo[3] = kt;
1269 fdctrl->fifo[4] = kh;
1270 fdctrl->fifo[5] = ks;
1271 return;
1272 case 4:
1273 /* No seek enabled */
1274 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1275 fdctrl->fifo[3] = kt;
1276 fdctrl->fifo[4] = kh;
1277 fdctrl->fifo[5] = ks;
1278 return;
1279 case 1:
1280 did_seek = 1;
1281 fdctrl->data_state |= FD_STATE_SEEK;
1282 break;
1283 default:
1284 break;
1285 }
1286 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1287 if (cur_drv->bs == NULL ||
1288 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1289 FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1290 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1291 } else {
1292 if (cur_drv->sect == cur_drv->last_sect) {
1293 fdctrl->data_state &= ~FD_STATE_FORMAT;
1294 /* Last sector done */
1295 if (FD_DID_SEEK(fdctrl->data_state))
1296 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1297 else
1298 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1299 } else {
1300 /* More to do */
1301 fdctrl->data_pos = 0;
1302 fdctrl->data_len = 4;
1303 }
1304 }
1305 }
1306
1307 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1308 {
1309 fdrive_t *cur_drv;
1310
1311 cur_drv = get_cur_drv(fdctrl);
1312 /* Reset mode */
1313 if (fdctrl->state & FD_CTRL_RESET) {
1314 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1315 return;
1316 }
1317 fdctrl->state &= ~FD_CTRL_SLEEP;
1318 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1319 FLOPPY_ERROR("can't write data in status mode\n");
1320 return;
1321 }
1322 /* Is it write command time ? */
1323 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1324 /* FIFO data write */
1325 fdctrl->fifo[fdctrl->data_pos++] = value;
1326 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1327 fdctrl->data_pos == fdctrl->data_len) {
1328 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1329 }
1330 /* Switch from transfer mode to status mode
1331 * then from status mode to command mode
1332 */
1333 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1334 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1335 return;
1336 }
1337 if (fdctrl->data_pos == 0) {
1338 /* Command */
1339 switch (value & 0x5F) {
1340 case 0x46:
1341 /* READ variants */
1342 FLOPPY_DPRINTF("READ command\n");
1343 /* 8 parameters cmd */
1344 fdctrl->data_len = 9;
1345 goto enqueue;
1346 case 0x4C:
1347 /* READ_DELETED variants */
1348 FLOPPY_DPRINTF("READ_DELETED command\n");
1349 /* 8 parameters cmd */
1350 fdctrl->data_len = 9;
1351 goto enqueue;
1352 case 0x50:
1353 /* SCAN_EQUAL variants */
1354 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1355 /* 8 parameters cmd */
1356 fdctrl->data_len = 9;
1357 goto enqueue;
1358 case 0x56:
1359 /* VERIFY variants */
1360 FLOPPY_DPRINTF("VERIFY command\n");
1361 /* 8 parameters cmd */
1362 fdctrl->data_len = 9;
1363 goto enqueue;
1364 case 0x59:
1365 /* SCAN_LOW_OR_EQUAL variants */
1366 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1367 /* 8 parameters cmd */
1368 fdctrl->data_len = 9;
1369 goto enqueue;
1370 case 0x5D:
1371 /* SCAN_HIGH_OR_EQUAL variants */
1372 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1373 /* 8 parameters cmd */
1374 fdctrl->data_len = 9;
1375 goto enqueue;
1376 default:
1377 break;
1378 }
1379 switch (value & 0x7F) {
1380 case 0x45:
1381 /* WRITE variants */
1382 FLOPPY_DPRINTF("WRITE command\n");
1383 /* 8 parameters cmd */
1384 fdctrl->data_len = 9;
1385 goto enqueue;
1386 case 0x49:
1387 /* WRITE_DELETED variants */
1388 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1389 /* 8 parameters cmd */
1390 fdctrl->data_len = 9;
1391 goto enqueue;
1392 default:
1393 break;
1394 }
1395 switch (value) {
1396 case 0x03:
1397 /* SPECIFY */
1398 FLOPPY_DPRINTF("SPECIFY command\n");
1399 /* 1 parameter cmd */
1400 fdctrl->data_len = 3;
1401 goto enqueue;
1402 case 0x04:
1403 /* SENSE_DRIVE_STATUS */
1404 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1405 /* 1 parameter cmd */
1406 fdctrl->data_len = 2;
1407 goto enqueue;
1408 case 0x07:
1409 /* RECALIBRATE */
1410 FLOPPY_DPRINTF("RECALIBRATE command\n");
1411 /* 1 parameter cmd */
1412 fdctrl->data_len = 2;
1413 goto enqueue;
1414 case 0x08:
1415 /* SENSE_INTERRUPT_STATUS */
1416 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1417 fdctrl->int_status);
1418 /* No parameters cmd: returns status if no interrupt */
1419 #if 0
1420 fdctrl->fifo[0] =
1421 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1422 #else
1423 /* XXX: int_status handling is broken for read/write
1424 commands, so we do this hack. It should be suppressed
1425 ASAP */
1426 fdctrl->fifo[0] =
1427 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1428 #endif
1429 fdctrl->fifo[1] = cur_drv->track;
1430 fdctrl_set_fifo(fdctrl, 2, 0);
1431 fdctrl_reset_irq(fdctrl);
1432 fdctrl->int_status = 0xC0;
1433 return;
1434 case 0x0E:
1435 /* DUMPREG */
1436 FLOPPY_DPRINTF("DUMPREG command\n");
1437 /* Drives position */
1438 fdctrl->fifo[0] = drv0(fdctrl)->track;
1439 fdctrl->fifo[1] = drv1(fdctrl)->track;
1440 fdctrl->fifo[2] = 0;
1441 fdctrl->fifo[3] = 0;
1442 /* timers */
1443 fdctrl->fifo[4] = fdctrl->timer0;
1444 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1445 fdctrl->fifo[6] = cur_drv->last_sect;
1446 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1447 (cur_drv->perpendicular << 2);
1448 fdctrl->fifo[8] = fdctrl->config;
1449 fdctrl->fifo[9] = fdctrl->precomp_trk;
1450 fdctrl_set_fifo(fdctrl, 10, 0);
1451 return;
1452 case 0x0F:
1453 /* SEEK */
1454 FLOPPY_DPRINTF("SEEK command\n");
1455 /* 2 parameters cmd */
1456 fdctrl->data_len = 3;
1457 goto enqueue;
1458 case 0x10:
1459 /* VERSION */
1460 FLOPPY_DPRINTF("VERSION command\n");
1461 /* No parameters cmd */
1462 /* Controller's version */
1463 fdctrl->fifo[0] = fdctrl->version;
1464 fdctrl_set_fifo(fdctrl, 1, 1);
1465 return;
1466 case 0x12:
1467 /* PERPENDICULAR_MODE */
1468 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1469 /* 1 parameter cmd */
1470 fdctrl->data_len = 2;
1471 goto enqueue;
1472 case 0x13:
1473 /* CONFIGURE */
1474 FLOPPY_DPRINTF("CONFIGURE command\n");
1475 /* 3 parameters cmd */
1476 fdctrl->data_len = 4;
1477 goto enqueue;
1478 case 0x14:
1479 /* UNLOCK */
1480 FLOPPY_DPRINTF("UNLOCK command\n");
1481 /* No parameters cmd */
1482 fdctrl->lock = 0;
1483 fdctrl->fifo[0] = 0;
1484 fdctrl_set_fifo(fdctrl, 1, 0);
1485 return;
1486 case 0x17:
1487 /* POWERDOWN_MODE */
1488 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1489 /* 2 parameters cmd */
1490 fdctrl->data_len = 3;
1491 goto enqueue;
1492 case 0x18:
1493 /* PART_ID */
1494 FLOPPY_DPRINTF("PART_ID command\n");
1495 /* No parameters cmd */
1496 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1497 fdctrl_set_fifo(fdctrl, 1, 0);
1498 return;
1499 case 0x2C:
1500 /* SAVE */
1501 FLOPPY_DPRINTF("SAVE command\n");
1502 /* No parameters cmd */
1503 fdctrl->fifo[0] = 0;
1504 fdctrl->fifo[1] = 0;
1505 /* Drives position */
1506 fdctrl->fifo[2] = drv0(fdctrl)->track;
1507 fdctrl->fifo[3] = drv1(fdctrl)->track;
1508 fdctrl->fifo[4] = 0;
1509 fdctrl->fifo[5] = 0;
1510 /* timers */
1511 fdctrl->fifo[6] = fdctrl->timer0;
1512 fdctrl->fifo[7] = fdctrl->timer1;
1513 fdctrl->fifo[8] = cur_drv->last_sect;
1514 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1515 (cur_drv->perpendicular << 2);
1516 fdctrl->fifo[10] = fdctrl->config;
1517 fdctrl->fifo[11] = fdctrl->precomp_trk;
1518 fdctrl->fifo[12] = fdctrl->pwrd;
1519 fdctrl->fifo[13] = 0;
1520 fdctrl->fifo[14] = 0;
1521 fdctrl_set_fifo(fdctrl, 15, 1);
1522 return;
1523 case 0x33:
1524 /* OPTION */
1525 FLOPPY_DPRINTF("OPTION command\n");
1526 /* 1 parameter cmd */
1527 fdctrl->data_len = 2;
1528 goto enqueue;
1529 case 0x42:
1530 /* READ_TRACK */
1531 FLOPPY_DPRINTF("READ_TRACK command\n");
1532 /* 8 parameters cmd */
1533 fdctrl->data_len = 9;
1534 goto enqueue;
1535 case 0x4A:
1536 /* READ_ID */
1537 FLOPPY_DPRINTF("READ_ID command\n");
1538 /* 1 parameter cmd */
1539 fdctrl->data_len = 2;
1540 goto enqueue;
1541 case 0x4C:
1542 /* RESTORE */
1543 FLOPPY_DPRINTF("RESTORE command\n");
1544 /* 17 parameters cmd */
1545 fdctrl->data_len = 18;
1546 goto enqueue;
1547 case 0x4D:
1548 /* FORMAT_TRACK */
1549 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1550 /* 5 parameters cmd */
1551 fdctrl->data_len = 6;
1552 goto enqueue;
1553 case 0x8E:
1554 /* DRIVE_SPECIFICATION_COMMAND */
1555 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1556 /* 5 parameters cmd */
1557 fdctrl->data_len = 6;
1558 goto enqueue;
1559 case 0x8F:
1560 /* RELATIVE_SEEK_OUT */
1561 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1562 /* 2 parameters cmd */
1563 fdctrl->data_len = 3;
1564 goto enqueue;
1565 case 0x94:
1566 /* LOCK */
1567 FLOPPY_DPRINTF("LOCK command\n");
1568 /* No parameters cmd */
1569 fdctrl->lock = 1;
1570 fdctrl->fifo[0] = 0x10;
1571 fdctrl_set_fifo(fdctrl, 1, 1);
1572 return;
1573 case 0xCD:
1574 /* FORMAT_AND_WRITE */
1575 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1576 /* 10 parameters cmd */
1577 fdctrl->data_len = 11;
1578 goto enqueue;
1579 case 0xCF:
1580 /* RELATIVE_SEEK_IN */
1581 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1582 /* 2 parameters cmd */
1583 fdctrl->data_len = 3;
1584 goto enqueue;
1585 default:
1586 /* Unknown command */
1587 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1588 fdctrl_unimplemented(fdctrl);
1589 return;
1590 }
1591 }
1592 enqueue:
1593 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1594 fdctrl->fifo[fdctrl->data_pos] = value;
1595 if (++fdctrl->data_pos == fdctrl->data_len) {
1596 /* We now have all parameters
1597 * and will be able to treat the command
1598 */
1599 if (fdctrl->data_state & FD_STATE_FORMAT) {
1600 fdctrl_format_sector(fdctrl);
1601 return;
1602 }
1603 switch (fdctrl->fifo[0] & 0x1F) {
1604 case 0x06:
1605 {
1606 /* READ variants */
1607 FLOPPY_DPRINTF("treat READ command\n");
1608 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1609 return;
1610 }
1611 case 0x0C:
1612 /* READ_DELETED variants */
1613 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1614 FLOPPY_ERROR("treat READ_DELETED command\n");
1615 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1616 return;
1617 case 0x16:
1618 /* VERIFY variants */
1619 // FLOPPY_DPRINTF("treat VERIFY command\n");
1620 FLOPPY_ERROR("treat VERIFY command\n");
1621 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1622 return;
1623 case 0x10:
1624 /* SCAN_EQUAL variants */
1625 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1626 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1627 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1628 return;
1629 case 0x19:
1630 /* SCAN_LOW_OR_EQUAL variants */
1631 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1632 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1633 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1634 return;
1635 case 0x1D:
1636 /* SCAN_HIGH_OR_EQUAL variants */
1637 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1638 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1639 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1640 return;
1641 default:
1642 break;
1643 }
1644 switch (fdctrl->fifo[0] & 0x3F) {
1645 case 0x05:
1646 /* WRITE variants */
1647 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1648 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1649 return;
1650 case 0x09:
1651 /* WRITE_DELETED variants */
1652 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1653 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1654 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1655 return;
1656 default:
1657 break;
1658 }
1659 switch (fdctrl->fifo[0]) {
1660 case 0x03:
1661 /* SPECIFY */
1662 FLOPPY_DPRINTF("treat SPECIFY command\n");
1663 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1664 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1665 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1666 /* No result back */
1667 fdctrl_reset_fifo(fdctrl);
1668 break;
1669 case 0x04:
1670 /* SENSE_DRIVE_STATUS */
1671 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1672 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1673 cur_drv = get_cur_drv(fdctrl);
1674 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1675 /* 1 Byte status back */
1676 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1677 (cur_drv->track == 0 ? 0x10 : 0x00) |
1678 (cur_drv->head << 2) |
1679 fdctrl->cur_drv |
1680 0x28;
1681 fdctrl_set_fifo(fdctrl, 1, 0);
1682 break;
1683 case 0x07:
1684 /* RECALIBRATE */
1685 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1686 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1687 cur_drv = get_cur_drv(fdctrl);
1688 fd_recalibrate(cur_drv);
1689 fdctrl_reset_fifo(fdctrl);
1690 /* Raise Interrupt */
1691 fdctrl_raise_irq(fdctrl, 0x20);
1692 break;
1693 case 0x0F:
1694 /* SEEK */
1695 FLOPPY_DPRINTF("treat SEEK command\n");
1696 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1697 cur_drv = get_cur_drv(fdctrl);
1698 fd_start(cur_drv);
1699 if (fdctrl->fifo[2] <= cur_drv->track)
1700 cur_drv->dir = 1;
1701 else
1702 cur_drv->dir = 0;
1703 fdctrl_reset_fifo(fdctrl);
1704 if (fdctrl->fifo[2] > cur_drv->max_track) {
1705 fdctrl_raise_irq(fdctrl, 0x60);
1706 } else {
1707 cur_drv->track = fdctrl->fifo[2];
1708 /* Raise Interrupt */
1709 fdctrl_raise_irq(fdctrl, 0x20);
1710 }
1711 break;
1712 case 0x12:
1713 /* PERPENDICULAR_MODE */
1714 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1715 if (fdctrl->fifo[1] & 0x80)
1716 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1717 /* No result back */
1718 fdctrl_reset_fifo(fdctrl);
1719 break;
1720 case 0x13:
1721 /* CONFIGURE */
1722 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1723 fdctrl->config = fdctrl->fifo[2];
1724 fdctrl->precomp_trk = fdctrl->fifo[3];
1725 /* No result back */
1726 fdctrl_reset_fifo(fdctrl);
1727 break;
1728 case 0x17:
1729 /* POWERDOWN_MODE */
1730 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1731 fdctrl->pwrd = fdctrl->fifo[1];
1732 fdctrl->fifo[0] = fdctrl->fifo[1];
1733 fdctrl_set_fifo(fdctrl, 1, 1);
1734 break;
1735 case 0x33:
1736 /* OPTION */
1737 FLOPPY_DPRINTF("treat OPTION command\n");
1738 /* No result back */
1739 fdctrl_reset_fifo(fdctrl);
1740 break;
1741 case 0x42:
1742 /* READ_TRACK */
1743 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1744 FLOPPY_ERROR("treat READ_TRACK command\n");
1745 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1746 break;
1747 case 0x4A:
1748 /* READ_ID */
1749 FLOPPY_DPRINTF("treat READ_ID command\n");
1750 /* XXX: should set main status register to busy */
1751 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1752 qemu_mod_timer(fdctrl->result_timer,
1753 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1754 break;
1755 case 0x4C:
1756 /* RESTORE */
1757 FLOPPY_DPRINTF("treat RESTORE command\n");
1758 /* Drives position */
1759 drv0(fdctrl)->track = fdctrl->fifo[3];
1760 drv1(fdctrl)->track = fdctrl->fifo[4];
1761 /* timers */
1762 fdctrl->timer0 = fdctrl->fifo[7];
1763 fdctrl->timer1 = fdctrl->fifo[8];
1764 cur_drv->last_sect = fdctrl->fifo[9];
1765 fdctrl->lock = fdctrl->fifo[10] >> 7;
1766 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1767 fdctrl->config = fdctrl->fifo[11];
1768 fdctrl->precomp_trk = fdctrl->fifo[12];
1769 fdctrl->pwrd = fdctrl->fifo[13];
1770 fdctrl_reset_fifo(fdctrl);
1771 break;
1772 case 0x4D:
1773 /* FORMAT_TRACK */
1774 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1775 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1776 cur_drv = get_cur_drv(fdctrl);
1777 fdctrl->data_state |= FD_STATE_FORMAT;
1778 if (fdctrl->fifo[0] & 0x80)
1779 fdctrl->data_state |= FD_STATE_MULTI;
1780 else
1781 fdctrl->data_state &= ~FD_STATE_MULTI;
1782 fdctrl->data_state &= ~FD_STATE_SEEK;
1783 cur_drv->bps =
1784 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1785 #if 0
1786 cur_drv->last_sect =
1787 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1788 fdctrl->fifo[3] / 2;
1789 #else
1790 cur_drv->last_sect = fdctrl->fifo[3];
1791 #endif
1792 /* TODO: implement format using DMA expected by the Bochs BIOS
1793 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1794 * the sector with the specified fill byte
1795 */
1796 fdctrl->data_state &= ~FD_STATE_FORMAT;
1797 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1798 break;
1799 case 0x8E:
1800 /* DRIVE_SPECIFICATION_COMMAND */
1801 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1802 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1803 /* Command parameters done */
1804 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1805 fdctrl->fifo[0] = fdctrl->fifo[1];
1806 fdctrl->fifo[2] = 0;
1807 fdctrl->fifo[3] = 0;
1808 fdctrl_set_fifo(fdctrl, 4, 1);
1809 } else {
1810 fdctrl_reset_fifo(fdctrl);
1811 }
1812 } else if (fdctrl->data_len > 7) {
1813 /* ERROR */
1814 fdctrl->fifo[0] = 0x80 |
1815 (cur_drv->head << 2) | fdctrl->cur_drv;
1816 fdctrl_set_fifo(fdctrl, 1, 1);
1817 }
1818 break;
1819 case 0x8F:
1820 /* RELATIVE_SEEK_OUT */
1821 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1822 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1823 cur_drv = get_cur_drv(fdctrl);
1824 fd_start(cur_drv);
1825 cur_drv->dir = 0;
1826 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1827 cur_drv->track = cur_drv->max_track - 1;
1828 } else {
1829 cur_drv->track += fdctrl->fifo[2];
1830 }
1831 fdctrl_reset_fifo(fdctrl);
1832 fdctrl_raise_irq(fdctrl, 0x20);
1833 break;
1834 case 0xCD:
1835 /* FORMAT_AND_WRITE */
1836 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1837 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1838 fdctrl_unimplemented(fdctrl);
1839 break;
1840 case 0xCF:
1841 /* RELATIVE_SEEK_IN */
1842 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1843 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1844 cur_drv = get_cur_drv(fdctrl);
1845 fd_start(cur_drv);
1846 cur_drv->dir = 1;
1847 if (fdctrl->fifo[2] > cur_drv->track) {
1848 cur_drv->track = 0;
1849 } else {
1850 cur_drv->track -= fdctrl->fifo[2];
1851 }
1852 fdctrl_reset_fifo(fdctrl);
1853 /* Raise Interrupt */
1854 fdctrl_raise_irq(fdctrl, 0x20);
1855 break;
1856 }
1857 }
1858 }
1859
1860 static void fdctrl_result_timer(void *opaque)
1861 {
1862 fdctrl_t *fdctrl = opaque;
1863 fdrive_t *cur_drv = get_cur_drv(fdctrl);
1864
1865 /* Pretend we are spinning.
1866 * This is needed for Coherent, which uses READ ID to check for
1867 * sector interleaving.
1868 */
1869 if (cur_drv->last_sect != 0) {
1870 cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
1871 }
1872 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1873 }
Patches shipped by Fedora