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Unify IRQ handling.
[mirror_qemu.git] / hw / fdc.c
1 /*
2 * QEMU Floppy disk emulator (Intel 82078)
3 *
4 * Copyright (c) 2003 Jocelyn Mayer
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 /*
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 "vl.h"
29
30 /********************************************************/
31 /* debug Floppy devices */
32 //#define DEBUG_FLOPPY
33
34 #ifdef DEBUG_FLOPPY
35 #define FLOPPY_DPRINTF(fmt, args...) \
36 do { printf("FLOPPY: " fmt , ##args); } while (0)
37 #else
38 #define FLOPPY_DPRINTF(fmt, args...)
39 #endif
40
41 #define FLOPPY_ERROR(fmt, args...) \
42 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
43
44 /********************************************************/
45 /* Floppy drive emulation */
46
47 /* Will always be a fixed parameter for us */
48 #define FD_SECTOR_LEN 512
49 #define FD_SECTOR_SC 2 /* Sector size code */
50
51 /* Floppy disk drive emulation */
52 typedef enum fdisk_type_t {
53 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
54 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
55 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
56 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
57 FDRIVE_DISK_NONE = 0x05, /* No disk */
58 } fdisk_type_t;
59
60 typedef enum fdrive_type_t {
61 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
62 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
63 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
64 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
65 } fdrive_type_t;
66
67 typedef enum fdrive_flags_t {
68 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
69 } fdrive_flags_t;
70
71 typedef enum fdisk_flags_t {
72 FDISK_DBL_SIDES = 0x01,
73 } fdisk_flags_t;
74
75 typedef struct fdrive_t {
76 BlockDriverState *bs;
77 /* Drive status */
78 fdrive_type_t drive;
79 fdrive_flags_t drflags;
80 uint8_t perpendicular; /* 2.88 MB access mode */
81 /* Position */
82 uint8_t head;
83 uint8_t track;
84 uint8_t sect;
85 /* Last operation status */
86 uint8_t dir; /* Direction */
87 uint8_t rw; /* Read/write */
88 /* Media */
89 fdisk_flags_t flags;
90 uint8_t last_sect; /* Nb sector per track */
91 uint8_t max_track; /* Nb of tracks */
92 uint16_t bps; /* Bytes per sector */
93 uint8_t ro; /* Is read-only */
94 } fdrive_t;
95
96 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
97 {
98 /* Drive */
99 drv->bs = bs;
100 drv->drive = FDRIVE_DRV_NONE;
101 drv->drflags = 0;
102 drv->perpendicular = 0;
103 /* Disk */
104 drv->last_sect = 0;
105 drv->max_track = 0;
106 }
107
108 static int _fd_sector (uint8_t head, uint8_t track,
109 uint8_t sect, uint8_t last_sect)
110 {
111 return (((track * 2) + head) * last_sect) + sect - 1;
112 }
113
114 /* Returns current position, in sectors, for given drive */
115 static int fd_sector (fdrive_t *drv)
116 {
117 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
118 }
119
120 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
121 int enable_seek)
122 {
123 uint32_t sector;
124 int ret;
125
126 if (track > drv->max_track ||
127 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
128 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
129 head, track, sect, 1,
130 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
131 drv->max_track, drv->last_sect);
132 return 2;
133 }
134 if (sect > drv->last_sect) {
135 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
136 head, track, sect, 1,
137 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
138 drv->max_track, drv->last_sect);
139 return 3;
140 }
141 sector = _fd_sector(head, track, sect, drv->last_sect);
142 ret = 0;
143 if (sector != fd_sector(drv)) {
144 #if 0
145 if (!enable_seek) {
146 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
147 head, track, sect, 1, drv->max_track, drv->last_sect);
148 return 4;
149 }
150 #endif
151 drv->head = head;
152 if (drv->track != track)
153 ret = 1;
154 drv->track = track;
155 drv->sect = sect;
156 }
157
158 return ret;
159 }
160
161 /* Set drive back to track 0 */
162 static void fd_recalibrate (fdrive_t *drv)
163 {
164 FLOPPY_DPRINTF("recalibrate\n");
165 drv->head = 0;
166 drv->track = 0;
167 drv->sect = 1;
168 drv->dir = 1;
169 drv->rw = 0;
170 }
171
172 /* Recognize floppy formats */
173 typedef struct fd_format_t {
174 fdrive_type_t drive;
175 fdisk_type_t disk;
176 uint8_t last_sect;
177 uint8_t max_track;
178 uint8_t max_head;
179 const unsigned char *str;
180 } fd_format_t;
181
182 static fd_format_t fd_formats[] = {
183 /* First entry is default format */
184 /* 1.44 MB 3"1/2 floppy disks */
185 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
186 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
187 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
188 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
189 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
190 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
191 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
192 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
193 /* 2.88 MB 3"1/2 floppy disks */
194 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
195 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
196 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
197 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
198 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
199 /* 720 kB 3"1/2 floppy disks */
200 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
201 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
202 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
203 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
204 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
205 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
206 /* 1.2 MB 5"1/4 floppy disks */
207 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
208 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
209 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
210 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
211 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
212 /* 720 kB 5"1/4 floppy disks */
213 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
214 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
215 /* 360 kB 5"1/4 floppy disks */
216 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
217 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
219 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
220 /* 320 kB 5"1/4 floppy disks */
221 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
222 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
223 /* 360 kB must match 5"1/4 better than 3"1/2... */
224 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
225 /* end */
226 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
227 };
228
229 /* Revalidate a disk drive after a disk change */
230 static void fd_revalidate (fdrive_t *drv)
231 {
232 fd_format_t *parse;
233 int64_t nb_sectors, size;
234 int i, first_match, match;
235 int nb_heads, max_track, last_sect, ro;
236
237 FLOPPY_DPRINTF("revalidate\n");
238 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
239 ro = bdrv_is_read_only(drv->bs);
240 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
241 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
242 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
243 nb_heads - 1, max_track, last_sect);
244 } else {
245 bdrv_get_geometry(drv->bs, &nb_sectors);
246 match = -1;
247 first_match = -1;
248 for (i = 0;; i++) {
249 parse = &fd_formats[i];
250 if (parse->drive == FDRIVE_DRV_NONE)
251 break;
252 if (drv->drive == parse->drive ||
253 drv->drive == FDRIVE_DRV_NONE) {
254 size = (parse->max_head + 1) * parse->max_track *
255 parse->last_sect;
256 if (nb_sectors == size) {
257 match = i;
258 break;
259 }
260 if (first_match == -1)
261 first_match = i;
262 }
263 }
264 if (match == -1) {
265 if (first_match == -1)
266 match = 1;
267 else
268 match = first_match;
269 parse = &fd_formats[match];
270 }
271 nb_heads = parse->max_head + 1;
272 max_track = parse->max_track;
273 last_sect = parse->last_sect;
274 drv->drive = parse->drive;
275 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
276 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
277 }
278 if (nb_heads == 1) {
279 drv->flags &= ~FDISK_DBL_SIDES;
280 } else {
281 drv->flags |= FDISK_DBL_SIDES;
282 }
283 drv->max_track = max_track;
284 drv->last_sect = last_sect;
285 drv->ro = ro;
286 } else {
287 FLOPPY_DPRINTF("No disk in drive\n");
288 drv->last_sect = 0;
289 drv->max_track = 0;
290 drv->flags &= ~FDISK_DBL_SIDES;
291 }
292 }
293
294 /* Motor control */
295 static void fd_start (fdrive_t *drv)
296 {
297 drv->drflags |= FDRIVE_MOTOR_ON;
298 }
299
300 static void fd_stop (fdrive_t *drv)
301 {
302 drv->drflags &= ~FDRIVE_MOTOR_ON;
303 }
304
305 /* Re-initialise a drives (motor off, repositioned) */
306 static void fd_reset (fdrive_t *drv)
307 {
308 fd_stop(drv);
309 fd_recalibrate(drv);
310 }
311
312 /********************************************************/
313 /* Intel 82078 floppy disk controller emulation */
314
315 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
316 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
317 static int fdctrl_transfer_handler (void *opaque, int nchan,
318 int dma_pos, int dma_len);
319 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
320 static void fdctrl_result_timer(void *opaque);
321
322 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
323 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
324 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
325 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
326 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
327 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
328 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
329 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
330 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
331 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
332
333 enum {
334 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
335 FD_CTRL_RESET = 0x02,
336 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
337 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
338 FD_CTRL_INTR = 0x10,
339 };
340
341 enum {
342 FD_DIR_WRITE = 0,
343 FD_DIR_READ = 1,
344 FD_DIR_SCANE = 2,
345 FD_DIR_SCANL = 3,
346 FD_DIR_SCANH = 4,
347 };
348
349 enum {
350 FD_STATE_CMD = 0x00,
351 FD_STATE_STATUS = 0x01,
352 FD_STATE_DATA = 0x02,
353 FD_STATE_STATE = 0x03,
354 FD_STATE_MULTI = 0x10,
355 FD_STATE_SEEK = 0x20,
356 FD_STATE_FORMAT = 0x40,
357 };
358
359 #define FD_STATE(state) ((state) & FD_STATE_STATE)
360 #define FD_SET_STATE(state, new_state) \
361 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
362 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
363 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
364 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
365
366 struct fdctrl_t {
367 fdctrl_t *fdctrl;
368 /* Controller's identification */
369 uint8_t version;
370 /* HW */
371 qemu_irq irq;
372 int dma_chann;
373 uint32_t io_base;
374 /* Controller state */
375 QEMUTimer *result_timer;
376 uint8_t state;
377 uint8_t dma_en;
378 uint8_t cur_drv;
379 uint8_t bootsel;
380 /* Command FIFO */
381 uint8_t fifo[FD_SECTOR_LEN];
382 uint32_t data_pos;
383 uint32_t data_len;
384 uint8_t data_state;
385 uint8_t data_dir;
386 uint8_t int_status;
387 uint8_t eot; /* last wanted sector */
388 /* States kept only to be returned back */
389 /* Timers state */
390 uint8_t timer0;
391 uint8_t timer1;
392 /* precompensation */
393 uint8_t precomp_trk;
394 uint8_t config;
395 uint8_t lock;
396 /* Power down config (also with status regB access mode */
397 uint8_t pwrd;
398 /* Floppy drives */
399 fdrive_t drives[2];
400 };
401
402 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
403 {
404 fdctrl_t *fdctrl = opaque;
405 uint32_t retval;
406
407 switch (reg & 0x07) {
408 #ifdef TARGET_SPARC
409 case 0x00:
410 // Identify to Linux as S82078B
411 retval = fdctrl_read_statusB(fdctrl);
412 break;
413 #endif
414 case 0x01:
415 retval = fdctrl_read_statusB(fdctrl);
416 break;
417 case 0x02:
418 retval = fdctrl_read_dor(fdctrl);
419 break;
420 case 0x03:
421 retval = fdctrl_read_tape(fdctrl);
422 break;
423 case 0x04:
424 retval = fdctrl_read_main_status(fdctrl);
425 break;
426 case 0x05:
427 retval = fdctrl_read_data(fdctrl);
428 break;
429 case 0x07:
430 retval = fdctrl_read_dir(fdctrl);
431 break;
432 default:
433 retval = (uint32_t)(-1);
434 break;
435 }
436 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
437
438 return retval;
439 }
440
441 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
442 {
443 fdctrl_t *fdctrl = opaque;
444
445 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
446
447 switch (reg & 0x07) {
448 case 0x02:
449 fdctrl_write_dor(fdctrl, value);
450 break;
451 case 0x03:
452 fdctrl_write_tape(fdctrl, value);
453 break;
454 case 0x04:
455 fdctrl_write_rate(fdctrl, value);
456 break;
457 case 0x05:
458 fdctrl_write_data(fdctrl, value);
459 break;
460 default:
461 break;
462 }
463 }
464
465 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
466 {
467 return fdctrl_read(opaque, reg);
468 }
469
470 static void fdctrl_write_mem (void *opaque,
471 target_phys_addr_t reg, uint32_t value)
472 {
473 fdctrl_write(opaque, reg, value);
474 }
475
476 static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
477 fdctrl_read_mem,
478 fdctrl_read_mem,
479 fdctrl_read_mem,
480 };
481
482 static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
483 fdctrl_write_mem,
484 fdctrl_write_mem,
485 fdctrl_write_mem,
486 };
487
488 fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
489 uint32_t io_base,
490 BlockDriverState **fds)
491 {
492 fdctrl_t *fdctrl;
493 int io_mem;
494 int i;
495
496 FLOPPY_DPRINTF("init controller\n");
497 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
498 if (!fdctrl)
499 return NULL;
500 fdctrl->result_timer = qemu_new_timer(vm_clock,
501 fdctrl_result_timer, fdctrl);
502
503 fdctrl->version = 0x90; /* Intel 82078 controller */
504 fdctrl->irq = irq;
505 fdctrl->dma_chann = dma_chann;
506 fdctrl->io_base = io_base;
507 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
508 if (fdctrl->dma_chann != -1) {
509 fdctrl->dma_en = 1;
510 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
511 } else {
512 fdctrl->dma_en = 0;
513 }
514 for (i = 0; i < 2; i++) {
515 fd_init(&fdctrl->drives[i], fds[i]);
516 }
517 fdctrl_reset(fdctrl, 0);
518 fdctrl->state = FD_CTRL_ACTIVE;
519 if (mem_mapped) {
520 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write, fdctrl);
521 cpu_register_physical_memory(io_base, 0x08, io_mem);
522 } else {
523 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
524 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
525 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
526 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
527 }
528 for (i = 0; i < 2; i++) {
529 fd_revalidate(&fdctrl->drives[i]);
530 }
531
532 return fdctrl;
533 }
534
535 /* XXX: may change if moved to bdrv */
536 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
537 {
538 return fdctrl->drives[drive_num].drive;
539 }
540
541 /* Change IRQ state */
542 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
543 {
544 FLOPPY_DPRINTF("Reset interrupt\n");
545 qemu_set_irq(fdctrl->irq, 0);
546 fdctrl->state &= ~FD_CTRL_INTR;
547 }
548
549 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
550 {
551 #ifdef TARGET_SPARC
552 // Sparc mutation
553 if (!fdctrl->dma_en) {
554 fdctrl->state &= ~FD_CTRL_BUSY;
555 fdctrl->int_status = status;
556 return;
557 }
558 #endif
559 if (~(fdctrl->state & FD_CTRL_INTR)) {
560 qemu_set_irq(fdctrl->irq, 1);
561 fdctrl->state |= FD_CTRL_INTR;
562 }
563 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
564 fdctrl->int_status = status;
565 }
566
567 /* Reset controller */
568 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
569 {
570 int i;
571
572 FLOPPY_DPRINTF("reset controller\n");
573 fdctrl_reset_irq(fdctrl);
574 /* Initialise controller */
575 fdctrl->cur_drv = 0;
576 /* FIFO state */
577 fdctrl->data_pos = 0;
578 fdctrl->data_len = 0;
579 fdctrl->data_state = FD_STATE_CMD;
580 fdctrl->data_dir = FD_DIR_WRITE;
581 for (i = 0; i < MAX_FD; i++)
582 fd_reset(&fdctrl->drives[i]);
583 fdctrl_reset_fifo(fdctrl);
584 if (do_irq)
585 fdctrl_raise_irq(fdctrl, 0xc0);
586 }
587
588 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
589 {
590 return &fdctrl->drives[fdctrl->bootsel];
591 }
592
593 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
594 {
595 return &fdctrl->drives[1 - fdctrl->bootsel];
596 }
597
598 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
599 {
600 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
601 }
602
603 /* Status B register : 0x01 (read-only) */
604 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
605 {
606 FLOPPY_DPRINTF("status register: 0x00\n");
607 return 0;
608 }
609
610 /* Digital output register : 0x02 */
611 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
612 {
613 uint32_t retval = 0;
614
615 /* Drive motors state indicators */
616 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
617 retval |= 1 << 5;
618 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
619 retval |= 1 << 4;
620 /* DMA enable */
621 retval |= fdctrl->dma_en << 3;
622 /* Reset indicator */
623 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
624 /* Selected drive */
625 retval |= fdctrl->cur_drv;
626 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
627
628 return retval;
629 }
630
631 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
632 {
633 /* Reset mode */
634 if (fdctrl->state & FD_CTRL_RESET) {
635 if (!(value & 0x04)) {
636 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
637 return;
638 }
639 }
640 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
641 /* Drive motors state indicators */
642 if (value & 0x20)
643 fd_start(drv1(fdctrl));
644 else
645 fd_stop(drv1(fdctrl));
646 if (value & 0x10)
647 fd_start(drv0(fdctrl));
648 else
649 fd_stop(drv0(fdctrl));
650 /* DMA enable */
651 #if 0
652 if (fdctrl->dma_chann != -1)
653 fdctrl->dma_en = 1 - ((value >> 3) & 1);
654 #endif
655 /* Reset */
656 if (!(value & 0x04)) {
657 if (!(fdctrl->state & FD_CTRL_RESET)) {
658 FLOPPY_DPRINTF("controller enter RESET state\n");
659 fdctrl->state |= FD_CTRL_RESET;
660 }
661 } else {
662 if (fdctrl->state & FD_CTRL_RESET) {
663 FLOPPY_DPRINTF("controller out of RESET state\n");
664 fdctrl_reset(fdctrl, 1);
665 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
666 }
667 }
668 /* Selected drive */
669 fdctrl->cur_drv = value & 1;
670 }
671
672 /* Tape drive register : 0x03 */
673 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
674 {
675 uint32_t retval = 0;
676
677 /* Disk boot selection indicator */
678 retval |= fdctrl->bootsel << 2;
679 /* Tape indicators: never allowed */
680 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
681
682 return retval;
683 }
684
685 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
686 {
687 /* Reset mode */
688 if (fdctrl->state & FD_CTRL_RESET) {
689 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
690 return;
691 }
692 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
693 /* Disk boot selection indicator */
694 fdctrl->bootsel = (value >> 2) & 1;
695 /* Tape indicators: never allow */
696 }
697
698 /* Main status register : 0x04 (read) */
699 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
700 {
701 uint32_t retval = 0;
702
703 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
704 if (!(fdctrl->state & FD_CTRL_BUSY)) {
705 /* Data transfer allowed */
706 retval |= 0x80;
707 /* Data transfer direction indicator */
708 if (fdctrl->data_dir == FD_DIR_READ)
709 retval |= 0x40;
710 }
711 /* Should handle 0x20 for SPECIFY command */
712 /* Command busy indicator */
713 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
714 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
715 retval |= 0x10;
716 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
717
718 return retval;
719 }
720
721 /* Data select rate register : 0x04 (write) */
722 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
723 {
724 /* Reset mode */
725 if (fdctrl->state & FD_CTRL_RESET) {
726 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
727 return;
728 }
729 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
730 /* Reset: autoclear */
731 if (value & 0x80) {
732 fdctrl->state |= FD_CTRL_RESET;
733 fdctrl_reset(fdctrl, 1);
734 fdctrl->state &= ~FD_CTRL_RESET;
735 }
736 if (value & 0x40) {
737 fdctrl->state |= FD_CTRL_SLEEP;
738 fdctrl_reset(fdctrl, 1);
739 }
740 // fdctrl.precomp = (value >> 2) & 0x07;
741 }
742
743 static int fdctrl_media_changed(fdrive_t *drv)
744 {
745 int ret;
746 if (!drv->bs)
747 return 0;
748 ret = bdrv_media_changed(drv->bs);
749 if (ret) {
750 fd_revalidate(drv);
751 }
752 return ret;
753 }
754
755 /* Digital input register : 0x07 (read-only) */
756 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
757 {
758 uint32_t retval = 0;
759
760 if (fdctrl_media_changed(drv0(fdctrl)) ||
761 fdctrl_media_changed(drv1(fdctrl)))
762 retval |= 0x80;
763 if (retval != 0)
764 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
765
766 return retval;
767 }
768
769 /* FIFO state control */
770 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
771 {
772 fdctrl->data_dir = FD_DIR_WRITE;
773 fdctrl->data_pos = 0;
774 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
775 }
776
777 /* Set FIFO status for the host to read */
778 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
779 {
780 fdctrl->data_dir = FD_DIR_READ;
781 fdctrl->data_len = fifo_len;
782 fdctrl->data_pos = 0;
783 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
784 if (do_irq)
785 fdctrl_raise_irq(fdctrl, 0x00);
786 }
787
788 /* Set an error: unimplemented/unknown command */
789 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
790 {
791 #if 0
792 fdrive_t *cur_drv;
793
794 cur_drv = get_cur_drv(fdctrl);
795 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
796 fdctrl->fifo[1] = 0x00;
797 fdctrl->fifo[2] = 0x00;
798 fdctrl_set_fifo(fdctrl, 3, 1);
799 #else
800 // fdctrl_reset_fifo(fdctrl);
801 fdctrl->fifo[0] = 0x80;
802 fdctrl_set_fifo(fdctrl, 1, 0);
803 #endif
804 }
805
806 /* Callback for transfer end (stop or abort) */
807 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
808 uint8_t status1, uint8_t status2)
809 {
810 fdrive_t *cur_drv;
811
812 cur_drv = get_cur_drv(fdctrl);
813 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
814 status0, status1, status2,
815 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
816 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
817 fdctrl->fifo[1] = status1;
818 fdctrl->fifo[2] = status2;
819 fdctrl->fifo[3] = cur_drv->track;
820 fdctrl->fifo[4] = cur_drv->head;
821 fdctrl->fifo[5] = cur_drv->sect;
822 fdctrl->fifo[6] = FD_SECTOR_SC;
823 fdctrl->data_dir = FD_DIR_READ;
824 if (fdctrl->state & FD_CTRL_BUSY) {
825 DMA_release_DREQ(fdctrl->dma_chann);
826 fdctrl->state &= ~FD_CTRL_BUSY;
827 }
828 fdctrl_set_fifo(fdctrl, 7, 1);
829 }
830
831 /* Prepare a data transfer (either DMA or FIFO) */
832 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
833 {
834 fdrive_t *cur_drv;
835 uint8_t kh, kt, ks;
836 int did_seek;
837
838 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
839 cur_drv = get_cur_drv(fdctrl);
840 kt = fdctrl->fifo[2];
841 kh = fdctrl->fifo[3];
842 ks = fdctrl->fifo[4];
843 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
844 fdctrl->cur_drv, kh, kt, ks,
845 _fd_sector(kh, kt, ks, cur_drv->last_sect));
846 did_seek = 0;
847 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
848 case 2:
849 /* sect too big */
850 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
851 fdctrl->fifo[3] = kt;
852 fdctrl->fifo[4] = kh;
853 fdctrl->fifo[5] = ks;
854 return;
855 case 3:
856 /* track too big */
857 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
858 fdctrl->fifo[3] = kt;
859 fdctrl->fifo[4] = kh;
860 fdctrl->fifo[5] = ks;
861 return;
862 case 4:
863 /* No seek enabled */
864 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
865 fdctrl->fifo[3] = kt;
866 fdctrl->fifo[4] = kh;
867 fdctrl->fifo[5] = ks;
868 return;
869 case 1:
870 did_seek = 1;
871 break;
872 default:
873 break;
874 }
875 /* Set the FIFO state */
876 fdctrl->data_dir = direction;
877 fdctrl->data_pos = 0;
878 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
879 if (fdctrl->fifo[0] & 0x80)
880 fdctrl->data_state |= FD_STATE_MULTI;
881 else
882 fdctrl->data_state &= ~FD_STATE_MULTI;
883 if (did_seek)
884 fdctrl->data_state |= FD_STATE_SEEK;
885 else
886 fdctrl->data_state &= ~FD_STATE_SEEK;
887 if (fdctrl->fifo[5] == 00) {
888 fdctrl->data_len = fdctrl->fifo[8];
889 } else {
890 int tmp;
891 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
892 tmp = (cur_drv->last_sect - ks + 1);
893 if (fdctrl->fifo[0] & 0x80)
894 tmp += cur_drv->last_sect;
895 fdctrl->data_len *= tmp;
896 }
897 fdctrl->eot = fdctrl->fifo[6];
898 if (fdctrl->dma_en) {
899 int dma_mode;
900 /* DMA transfer are enabled. Check if DMA channel is well programmed */
901 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
902 dma_mode = (dma_mode >> 2) & 3;
903 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
904 dma_mode, direction,
905 (128 << fdctrl->fifo[5]) *
906 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
907 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
908 direction == FD_DIR_SCANH) && dma_mode == 0) ||
909 (direction == FD_DIR_WRITE && dma_mode == 2) ||
910 (direction == FD_DIR_READ && dma_mode == 1)) {
911 /* No access is allowed until DMA transfer has completed */
912 fdctrl->state |= FD_CTRL_BUSY;
913 /* Now, we just have to wait for the DMA controller to
914 * recall us...
915 */
916 DMA_hold_DREQ(fdctrl->dma_chann);
917 DMA_schedule(fdctrl->dma_chann);
918 return;
919 } else {
920 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
921 }
922 }
923 FLOPPY_DPRINTF("start non-DMA transfer\n");
924 /* IO based transfer: calculate len */
925 fdctrl_raise_irq(fdctrl, 0x00);
926
927 return;
928 }
929
930 /* Prepare a transfer of deleted data */
931 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
932 {
933 /* We don't handle deleted data,
934 * so we don't return *ANYTHING*
935 */
936 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
937 }
938
939 /* handlers for DMA transfers */
940 static int fdctrl_transfer_handler (void *opaque, int nchan,
941 int dma_pos, int dma_len)
942 {
943 fdctrl_t *fdctrl;
944 fdrive_t *cur_drv;
945 int len, start_pos, rel_pos;
946 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
947
948 fdctrl = opaque;
949 if (!(fdctrl->state & FD_CTRL_BUSY)) {
950 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
951 return 0;
952 }
953 cur_drv = get_cur_drv(fdctrl);
954 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
955 fdctrl->data_dir == FD_DIR_SCANH)
956 status2 = 0x04;
957 if (dma_len > fdctrl->data_len)
958 dma_len = fdctrl->data_len;
959 if (cur_drv->bs == NULL) {
960 if (fdctrl->data_dir == FD_DIR_WRITE)
961 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
962 else
963 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
964 len = 0;
965 goto transfer_error;
966 }
967 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
968 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
969 len = dma_len - fdctrl->data_pos;
970 if (len + rel_pos > FD_SECTOR_LEN)
971 len = FD_SECTOR_LEN - rel_pos;
972 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
973 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
974 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
975 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
976 fd_sector(cur_drv) * 512);
977 if (fdctrl->data_dir != FD_DIR_WRITE ||
978 len < FD_SECTOR_LEN || rel_pos != 0) {
979 /* READ & SCAN commands and realign to a sector for WRITE */
980 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
981 fdctrl->fifo, 1) < 0) {
982 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
983 fd_sector(cur_drv));
984 /* Sure, image size is too small... */
985 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
986 }
987 }
988 switch (fdctrl->data_dir) {
989 case FD_DIR_READ:
990 /* READ commands */
991 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
992 fdctrl->data_pos, len);
993 /* cpu_physical_memory_write(addr + fdctrl->data_pos, */
994 /* fdctrl->fifo + rel_pos, len); */
995 break;
996 case FD_DIR_WRITE:
997 /* WRITE commands */
998 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
999 fdctrl->data_pos, len);
1000 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1001 /* fdctrl->fifo + rel_pos, len); */
1002 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1003 fdctrl->fifo, 1) < 0) {
1004 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1005 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1006 goto transfer_error;
1007 }
1008 break;
1009 default:
1010 /* SCAN commands */
1011 {
1012 uint8_t tmpbuf[FD_SECTOR_LEN];
1013 int ret;
1014 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1015 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1016 /* tmpbuf, len); */
1017 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1018 if (ret == 0) {
1019 status2 = 0x08;
1020 goto end_transfer;
1021 }
1022 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1023 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1024 status2 = 0x00;
1025 goto end_transfer;
1026 }
1027 }
1028 break;
1029 }
1030 fdctrl->data_pos += len;
1031 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1032 if (rel_pos == 0) {
1033 /* Seek to next sector */
1034 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1035 cur_drv->head, cur_drv->track, cur_drv->sect,
1036 fd_sector(cur_drv),
1037 fdctrl->data_pos - len);
1038 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1039 error in fact */
1040 if (cur_drv->sect >= cur_drv->last_sect ||
1041 cur_drv->sect == fdctrl->eot) {
1042 cur_drv->sect = 1;
1043 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1044 if (cur_drv->head == 0 &&
1045 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1046 cur_drv->head = 1;
1047 } else {
1048 cur_drv->head = 0;
1049 cur_drv->track++;
1050 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1051 break;
1052 }
1053 } else {
1054 cur_drv->track++;
1055 break;
1056 }
1057 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1058 cur_drv->head, cur_drv->track,
1059 cur_drv->sect, fd_sector(cur_drv));
1060 } else {
1061 cur_drv->sect++;
1062 }
1063 }
1064 }
1065 end_transfer:
1066 len = fdctrl->data_pos - start_pos;
1067 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1068 fdctrl->data_pos, len, fdctrl->data_len);
1069 if (fdctrl->data_dir == FD_DIR_SCANE ||
1070 fdctrl->data_dir == FD_DIR_SCANL ||
1071 fdctrl->data_dir == FD_DIR_SCANH)
1072 status2 = 0x08;
1073 if (FD_DID_SEEK(fdctrl->data_state))
1074 status0 |= 0x20;
1075 fdctrl->data_len -= len;
1076 // if (fdctrl->data_len == 0)
1077 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1078 transfer_error:
1079
1080 return len;
1081 }
1082
1083 /* Data register : 0x05 */
1084 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1085 {
1086 fdrive_t *cur_drv;
1087 uint32_t retval = 0;
1088 int pos, len;
1089
1090 cur_drv = get_cur_drv(fdctrl);
1091 fdctrl->state &= ~FD_CTRL_SLEEP;
1092 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1093 FLOPPY_ERROR("can't read data in CMD state\n");
1094 return 0;
1095 }
1096 pos = fdctrl->data_pos;
1097 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1098 pos %= FD_SECTOR_LEN;
1099 if (pos == 0) {
1100 len = fdctrl->data_len - fdctrl->data_pos;
1101 if (len > FD_SECTOR_LEN)
1102 len = FD_SECTOR_LEN;
1103 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1104 fdctrl->fifo, len);
1105 }
1106 }
1107 retval = fdctrl->fifo[pos];
1108 if (++fdctrl->data_pos == fdctrl->data_len) {
1109 fdctrl->data_pos = 0;
1110 /* Switch from transfer mode to status mode
1111 * then from status mode to command mode
1112 */
1113 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1114 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1115 } else {
1116 fdctrl_reset_fifo(fdctrl);
1117 fdctrl_reset_irq(fdctrl);
1118 }
1119 }
1120 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1121
1122 return retval;
1123 }
1124
1125 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1126 {
1127 fdrive_t *cur_drv;
1128 uint8_t kh, kt, ks;
1129 int did_seek;
1130
1131 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1132 cur_drv = get_cur_drv(fdctrl);
1133 kt = fdctrl->fifo[6];
1134 kh = fdctrl->fifo[7];
1135 ks = fdctrl->fifo[8];
1136 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1137 fdctrl->cur_drv, kh, kt, ks,
1138 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1139 did_seek = 0;
1140 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1141 case 2:
1142 /* sect too big */
1143 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1144 fdctrl->fifo[3] = kt;
1145 fdctrl->fifo[4] = kh;
1146 fdctrl->fifo[5] = ks;
1147 return;
1148 case 3:
1149 /* track too big */
1150 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1151 fdctrl->fifo[3] = kt;
1152 fdctrl->fifo[4] = kh;
1153 fdctrl->fifo[5] = ks;
1154 return;
1155 case 4:
1156 /* No seek enabled */
1157 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1158 fdctrl->fifo[3] = kt;
1159 fdctrl->fifo[4] = kh;
1160 fdctrl->fifo[5] = ks;
1161 return;
1162 case 1:
1163 did_seek = 1;
1164 fdctrl->data_state |= FD_STATE_SEEK;
1165 break;
1166 default:
1167 break;
1168 }
1169 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1170 if (cur_drv->bs == NULL ||
1171 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1172 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1173 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1174 } else {
1175 if (cur_drv->sect == cur_drv->last_sect) {
1176 fdctrl->data_state &= ~FD_STATE_FORMAT;
1177 /* Last sector done */
1178 if (FD_DID_SEEK(fdctrl->data_state))
1179 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1180 else
1181 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1182 } else {
1183 /* More to do */
1184 fdctrl->data_pos = 0;
1185 fdctrl->data_len = 4;
1186 }
1187 }
1188 }
1189
1190 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1191 {
1192 fdrive_t *cur_drv;
1193
1194 cur_drv = get_cur_drv(fdctrl);
1195 /* Reset mode */
1196 if (fdctrl->state & FD_CTRL_RESET) {
1197 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1198 return;
1199 }
1200 fdctrl->state &= ~FD_CTRL_SLEEP;
1201 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1202 FLOPPY_ERROR("can't write data in status mode\n");
1203 return;
1204 }
1205 /* Is it write command time ? */
1206 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1207 /* FIFO data write */
1208 fdctrl->fifo[fdctrl->data_pos++] = value;
1209 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1210 fdctrl->data_pos == fdctrl->data_len) {
1211 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1212 fdctrl->fifo, FD_SECTOR_LEN);
1213 }
1214 /* Switch from transfer mode to status mode
1215 * then from status mode to command mode
1216 */
1217 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1218 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1219 return;
1220 }
1221 if (fdctrl->data_pos == 0) {
1222 /* Command */
1223 switch (value & 0x5F) {
1224 case 0x46:
1225 /* READ variants */
1226 FLOPPY_DPRINTF("READ command\n");
1227 /* 8 parameters cmd */
1228 fdctrl->data_len = 9;
1229 goto enqueue;
1230 case 0x4C:
1231 /* READ_DELETED variants */
1232 FLOPPY_DPRINTF("READ_DELETED command\n");
1233 /* 8 parameters cmd */
1234 fdctrl->data_len = 9;
1235 goto enqueue;
1236 case 0x50:
1237 /* SCAN_EQUAL variants */
1238 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1239 /* 8 parameters cmd */
1240 fdctrl->data_len = 9;
1241 goto enqueue;
1242 case 0x56:
1243 /* VERIFY variants */
1244 FLOPPY_DPRINTF("VERIFY command\n");
1245 /* 8 parameters cmd */
1246 fdctrl->data_len = 9;
1247 goto enqueue;
1248 case 0x59:
1249 /* SCAN_LOW_OR_EQUAL variants */
1250 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1251 /* 8 parameters cmd */
1252 fdctrl->data_len = 9;
1253 goto enqueue;
1254 case 0x5D:
1255 /* SCAN_HIGH_OR_EQUAL variants */
1256 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1257 /* 8 parameters cmd */
1258 fdctrl->data_len = 9;
1259 goto enqueue;
1260 default:
1261 break;
1262 }
1263 switch (value & 0x7F) {
1264 case 0x45:
1265 /* WRITE variants */
1266 FLOPPY_DPRINTF("WRITE command\n");
1267 /* 8 parameters cmd */
1268 fdctrl->data_len = 9;
1269 goto enqueue;
1270 case 0x49:
1271 /* WRITE_DELETED variants */
1272 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1273 /* 8 parameters cmd */
1274 fdctrl->data_len = 9;
1275 goto enqueue;
1276 default:
1277 break;
1278 }
1279 switch (value) {
1280 case 0x03:
1281 /* SPECIFY */
1282 FLOPPY_DPRINTF("SPECIFY command\n");
1283 /* 1 parameter cmd */
1284 fdctrl->data_len = 3;
1285 goto enqueue;
1286 case 0x04:
1287 /* SENSE_DRIVE_STATUS */
1288 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1289 /* 1 parameter cmd */
1290 fdctrl->data_len = 2;
1291 goto enqueue;
1292 case 0x07:
1293 /* RECALIBRATE */
1294 FLOPPY_DPRINTF("RECALIBRATE command\n");
1295 /* 1 parameter cmd */
1296 fdctrl->data_len = 2;
1297 goto enqueue;
1298 case 0x08:
1299 /* SENSE_INTERRUPT_STATUS */
1300 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1301 fdctrl->int_status);
1302 /* No parameters cmd: returns status if no interrupt */
1303 #if 0
1304 fdctrl->fifo[0] =
1305 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1306 #else
1307 /* XXX: int_status handling is broken for read/write
1308 commands, so we do this hack. It should be suppressed
1309 ASAP */
1310 fdctrl->fifo[0] =
1311 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1312 #endif
1313 fdctrl->fifo[1] = cur_drv->track;
1314 fdctrl_set_fifo(fdctrl, 2, 0);
1315 fdctrl_reset_irq(fdctrl);
1316 fdctrl->int_status = 0xC0;
1317 return;
1318 case 0x0E:
1319 /* DUMPREG */
1320 FLOPPY_DPRINTF("DUMPREG command\n");
1321 /* Drives position */
1322 fdctrl->fifo[0] = drv0(fdctrl)->track;
1323 fdctrl->fifo[1] = drv1(fdctrl)->track;
1324 fdctrl->fifo[2] = 0;
1325 fdctrl->fifo[3] = 0;
1326 /* timers */
1327 fdctrl->fifo[4] = fdctrl->timer0;
1328 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1329 fdctrl->fifo[6] = cur_drv->last_sect;
1330 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1331 (cur_drv->perpendicular << 2);
1332 fdctrl->fifo[8] = fdctrl->config;
1333 fdctrl->fifo[9] = fdctrl->precomp_trk;
1334 fdctrl_set_fifo(fdctrl, 10, 0);
1335 return;
1336 case 0x0F:
1337 /* SEEK */
1338 FLOPPY_DPRINTF("SEEK command\n");
1339 /* 2 parameters cmd */
1340 fdctrl->data_len = 3;
1341 goto enqueue;
1342 case 0x10:
1343 /* VERSION */
1344 FLOPPY_DPRINTF("VERSION command\n");
1345 /* No parameters cmd */
1346 /* Controller's version */
1347 fdctrl->fifo[0] = fdctrl->version;
1348 fdctrl_set_fifo(fdctrl, 1, 1);
1349 return;
1350 case 0x12:
1351 /* PERPENDICULAR_MODE */
1352 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1353 /* 1 parameter cmd */
1354 fdctrl->data_len = 2;
1355 goto enqueue;
1356 case 0x13:
1357 /* CONFIGURE */
1358 FLOPPY_DPRINTF("CONFIGURE command\n");
1359 /* 3 parameters cmd */
1360 fdctrl->data_len = 4;
1361 goto enqueue;
1362 case 0x14:
1363 /* UNLOCK */
1364 FLOPPY_DPRINTF("UNLOCK command\n");
1365 /* No parameters cmd */
1366 fdctrl->lock = 0;
1367 fdctrl->fifo[0] = 0;
1368 fdctrl_set_fifo(fdctrl, 1, 0);
1369 return;
1370 case 0x17:
1371 /* POWERDOWN_MODE */
1372 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1373 /* 2 parameters cmd */
1374 fdctrl->data_len = 3;
1375 goto enqueue;
1376 case 0x18:
1377 /* PART_ID */
1378 FLOPPY_DPRINTF("PART_ID command\n");
1379 /* No parameters cmd */
1380 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1381 fdctrl_set_fifo(fdctrl, 1, 0);
1382 return;
1383 case 0x2C:
1384 /* SAVE */
1385 FLOPPY_DPRINTF("SAVE command\n");
1386 /* No parameters cmd */
1387 fdctrl->fifo[0] = 0;
1388 fdctrl->fifo[1] = 0;
1389 /* Drives position */
1390 fdctrl->fifo[2] = drv0(fdctrl)->track;
1391 fdctrl->fifo[3] = drv1(fdctrl)->track;
1392 fdctrl->fifo[4] = 0;
1393 fdctrl->fifo[5] = 0;
1394 /* timers */
1395 fdctrl->fifo[6] = fdctrl->timer0;
1396 fdctrl->fifo[7] = fdctrl->timer1;
1397 fdctrl->fifo[8] = cur_drv->last_sect;
1398 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1399 (cur_drv->perpendicular << 2);
1400 fdctrl->fifo[10] = fdctrl->config;
1401 fdctrl->fifo[11] = fdctrl->precomp_trk;
1402 fdctrl->fifo[12] = fdctrl->pwrd;
1403 fdctrl->fifo[13] = 0;
1404 fdctrl->fifo[14] = 0;
1405 fdctrl_set_fifo(fdctrl, 15, 1);
1406 return;
1407 case 0x33:
1408 /* OPTION */
1409 FLOPPY_DPRINTF("OPTION command\n");
1410 /* 1 parameter cmd */
1411 fdctrl->data_len = 2;
1412 goto enqueue;
1413 case 0x42:
1414 /* READ_TRACK */
1415 FLOPPY_DPRINTF("READ_TRACK command\n");
1416 /* 8 parameters cmd */
1417 fdctrl->data_len = 9;
1418 goto enqueue;
1419 case 0x4A:
1420 /* READ_ID */
1421 FLOPPY_DPRINTF("READ_ID command\n");
1422 /* 1 parameter cmd */
1423 fdctrl->data_len = 2;
1424 goto enqueue;
1425 case 0x4C:
1426 /* RESTORE */
1427 FLOPPY_DPRINTF("RESTORE command\n");
1428 /* 17 parameters cmd */
1429 fdctrl->data_len = 18;
1430 goto enqueue;
1431 case 0x4D:
1432 /* FORMAT_TRACK */
1433 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1434 /* 5 parameters cmd */
1435 fdctrl->data_len = 6;
1436 goto enqueue;
1437 case 0x8E:
1438 /* DRIVE_SPECIFICATION_COMMAND */
1439 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1440 /* 5 parameters cmd */
1441 fdctrl->data_len = 6;
1442 goto enqueue;
1443 case 0x8F:
1444 /* RELATIVE_SEEK_OUT */
1445 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1446 /* 2 parameters cmd */
1447 fdctrl->data_len = 3;
1448 goto enqueue;
1449 case 0x94:
1450 /* LOCK */
1451 FLOPPY_DPRINTF("LOCK command\n");
1452 /* No parameters cmd */
1453 fdctrl->lock = 1;
1454 fdctrl->fifo[0] = 0x10;
1455 fdctrl_set_fifo(fdctrl, 1, 1);
1456 return;
1457 case 0xCD:
1458 /* FORMAT_AND_WRITE */
1459 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1460 /* 10 parameters cmd */
1461 fdctrl->data_len = 11;
1462 goto enqueue;
1463 case 0xCF:
1464 /* RELATIVE_SEEK_IN */
1465 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1466 /* 2 parameters cmd */
1467 fdctrl->data_len = 3;
1468 goto enqueue;
1469 default:
1470 /* Unknown command */
1471 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1472 fdctrl_unimplemented(fdctrl);
1473 return;
1474 }
1475 }
1476 enqueue:
1477 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1478 fdctrl->fifo[fdctrl->data_pos] = value;
1479 if (++fdctrl->data_pos == fdctrl->data_len) {
1480 /* We now have all parameters
1481 * and will be able to treat the command
1482 */
1483 if (fdctrl->data_state & FD_STATE_FORMAT) {
1484 fdctrl_format_sector(fdctrl);
1485 return;
1486 }
1487 switch (fdctrl->fifo[0] & 0x1F) {
1488 case 0x06:
1489 {
1490 /* READ variants */
1491 FLOPPY_DPRINTF("treat READ command\n");
1492 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1493 return;
1494 }
1495 case 0x0C:
1496 /* READ_DELETED variants */
1497 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1498 FLOPPY_ERROR("treat READ_DELETED command\n");
1499 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1500 return;
1501 case 0x16:
1502 /* VERIFY variants */
1503 // FLOPPY_DPRINTF("treat VERIFY command\n");
1504 FLOPPY_ERROR("treat VERIFY command\n");
1505 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1506 return;
1507 case 0x10:
1508 /* SCAN_EQUAL variants */
1509 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1510 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1511 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1512 return;
1513 case 0x19:
1514 /* SCAN_LOW_OR_EQUAL variants */
1515 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1516 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1517 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1518 return;
1519 case 0x1D:
1520 /* SCAN_HIGH_OR_EQUAL variants */
1521 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1522 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1523 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1524 return;
1525 default:
1526 break;
1527 }
1528 switch (fdctrl->fifo[0] & 0x3F) {
1529 case 0x05:
1530 /* WRITE variants */
1531 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1532 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1533 return;
1534 case 0x09:
1535 /* WRITE_DELETED variants */
1536 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1537 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1538 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1539 return;
1540 default:
1541 break;
1542 }
1543 switch (fdctrl->fifo[0]) {
1544 case 0x03:
1545 /* SPECIFY */
1546 FLOPPY_DPRINTF("treat SPECIFY command\n");
1547 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1548 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1549 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1550 /* No result back */
1551 fdctrl_reset_fifo(fdctrl);
1552 break;
1553 case 0x04:
1554 /* SENSE_DRIVE_STATUS */
1555 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1556 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1557 cur_drv = get_cur_drv(fdctrl);
1558 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1559 /* 1 Byte status back */
1560 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1561 (cur_drv->track == 0 ? 0x10 : 0x00) |
1562 (cur_drv->head << 2) |
1563 fdctrl->cur_drv |
1564 0x28;
1565 fdctrl_set_fifo(fdctrl, 1, 0);
1566 break;
1567 case 0x07:
1568 /* RECALIBRATE */
1569 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1570 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1571 cur_drv = get_cur_drv(fdctrl);
1572 fd_recalibrate(cur_drv);
1573 fdctrl_reset_fifo(fdctrl);
1574 /* Raise Interrupt */
1575 fdctrl_raise_irq(fdctrl, 0x20);
1576 break;
1577 case 0x0F:
1578 /* SEEK */
1579 FLOPPY_DPRINTF("treat SEEK command\n");
1580 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1581 cur_drv = get_cur_drv(fdctrl);
1582 fd_start(cur_drv);
1583 if (fdctrl->fifo[2] <= cur_drv->track)
1584 cur_drv->dir = 1;
1585 else
1586 cur_drv->dir = 0;
1587 fdctrl_reset_fifo(fdctrl);
1588 if (fdctrl->fifo[2] > cur_drv->max_track) {
1589 fdctrl_raise_irq(fdctrl, 0x60);
1590 } else {
1591 cur_drv->track = fdctrl->fifo[2];
1592 /* Raise Interrupt */
1593 fdctrl_raise_irq(fdctrl, 0x20);
1594 }
1595 break;
1596 case 0x12:
1597 /* PERPENDICULAR_MODE */
1598 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1599 if (fdctrl->fifo[1] & 0x80)
1600 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1601 /* No result back */
1602 fdctrl_reset_fifo(fdctrl);
1603 break;
1604 case 0x13:
1605 /* CONFIGURE */
1606 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1607 fdctrl->config = fdctrl->fifo[2];
1608 fdctrl->precomp_trk = fdctrl->fifo[3];
1609 /* No result back */
1610 fdctrl_reset_fifo(fdctrl);
1611 break;
1612 case 0x17:
1613 /* POWERDOWN_MODE */
1614 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1615 fdctrl->pwrd = fdctrl->fifo[1];
1616 fdctrl->fifo[0] = fdctrl->fifo[1];
1617 fdctrl_set_fifo(fdctrl, 1, 1);
1618 break;
1619 case 0x33:
1620 /* OPTION */
1621 FLOPPY_DPRINTF("treat OPTION command\n");
1622 /* No result back */
1623 fdctrl_reset_fifo(fdctrl);
1624 break;
1625 case 0x42:
1626 /* READ_TRACK */
1627 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1628 FLOPPY_ERROR("treat READ_TRACK command\n");
1629 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1630 break;
1631 case 0x4A:
1632 /* READ_ID */
1633 FLOPPY_DPRINTF("treat READ_ID command\n");
1634 /* XXX: should set main status register to busy */
1635 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1636 qemu_mod_timer(fdctrl->result_timer,
1637 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1638 break;
1639 case 0x4C:
1640 /* RESTORE */
1641 FLOPPY_DPRINTF("treat RESTORE command\n");
1642 /* Drives position */
1643 drv0(fdctrl)->track = fdctrl->fifo[3];
1644 drv1(fdctrl)->track = fdctrl->fifo[4];
1645 /* timers */
1646 fdctrl->timer0 = fdctrl->fifo[7];
1647 fdctrl->timer1 = fdctrl->fifo[8];
1648 cur_drv->last_sect = fdctrl->fifo[9];
1649 fdctrl->lock = fdctrl->fifo[10] >> 7;
1650 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1651 fdctrl->config = fdctrl->fifo[11];
1652 fdctrl->precomp_trk = fdctrl->fifo[12];
1653 fdctrl->pwrd = fdctrl->fifo[13];
1654 fdctrl_reset_fifo(fdctrl);
1655 break;
1656 case 0x4D:
1657 /* FORMAT_TRACK */
1658 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1659 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1660 cur_drv = get_cur_drv(fdctrl);
1661 fdctrl->data_state |= FD_STATE_FORMAT;
1662 if (fdctrl->fifo[0] & 0x80)
1663 fdctrl->data_state |= FD_STATE_MULTI;
1664 else
1665 fdctrl->data_state &= ~FD_STATE_MULTI;
1666 fdctrl->data_state &= ~FD_STATE_SEEK;
1667 cur_drv->bps =
1668 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1669 #if 0
1670 cur_drv->last_sect =
1671 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1672 fdctrl->fifo[3] / 2;
1673 #else
1674 cur_drv->last_sect = fdctrl->fifo[3];
1675 #endif
1676 /* TODO: implement format using DMA expected by the Bochs BIOS
1677 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1678 * the sector with the specified fill byte
1679 */
1680 fdctrl->data_state &= ~FD_STATE_FORMAT;
1681 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1682 break;
1683 case 0x8E:
1684 /* DRIVE_SPECIFICATION_COMMAND */
1685 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1686 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1687 /* Command parameters done */
1688 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1689 fdctrl->fifo[0] = fdctrl->fifo[1];
1690 fdctrl->fifo[2] = 0;
1691 fdctrl->fifo[3] = 0;
1692 fdctrl_set_fifo(fdctrl, 4, 1);
1693 } else {
1694 fdctrl_reset_fifo(fdctrl);
1695 }
1696 } else if (fdctrl->data_len > 7) {
1697 /* ERROR */
1698 fdctrl->fifo[0] = 0x80 |
1699 (cur_drv->head << 2) | fdctrl->cur_drv;
1700 fdctrl_set_fifo(fdctrl, 1, 1);
1701 }
1702 break;
1703 case 0x8F:
1704 /* RELATIVE_SEEK_OUT */
1705 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1706 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1707 cur_drv = get_cur_drv(fdctrl);
1708 fd_start(cur_drv);
1709 cur_drv->dir = 0;
1710 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1711 cur_drv->track = cur_drv->max_track - 1;
1712 } else {
1713 cur_drv->track += fdctrl->fifo[2];
1714 }
1715 fdctrl_reset_fifo(fdctrl);
1716 fdctrl_raise_irq(fdctrl, 0x20);
1717 break;
1718 case 0xCD:
1719 /* FORMAT_AND_WRITE */
1720 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1721 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1722 fdctrl_unimplemented(fdctrl);
1723 break;
1724 case 0xCF:
1725 /* RELATIVE_SEEK_IN */
1726 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1727 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1728 cur_drv = get_cur_drv(fdctrl);
1729 fd_start(cur_drv);
1730 cur_drv->dir = 1;
1731 if (fdctrl->fifo[2] > cur_drv->track) {
1732 cur_drv->track = 0;
1733 } else {
1734 cur_drv->track -= fdctrl->fifo[2];
1735 }
1736 fdctrl_reset_fifo(fdctrl);
1737 /* Raise Interrupt */
1738 fdctrl_raise_irq(fdctrl, 0x20);
1739 break;
1740 }
1741 }
1742 }
1743
1744 static void fdctrl_result_timer(void *opaque)
1745 {
1746 fdctrl_t *fdctrl = opaque;
1747 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1748 }
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