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audio clean up (initial patch by malc)
[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 #include "vl.h"
25
26 /********************************************************/
27 /* debug Floppy devices */
28 //#define DEBUG_FLOPPY
29
30 #ifdef DEBUG_FLOPPY
31 #define FLOPPY_DPRINTF(fmt, args...) \
32 do { printf("FLOPPY: " fmt , ##args); } while (0)
33 #else
34 #define FLOPPY_DPRINTF(fmt, args...)
35 #endif
36
37 #define FLOPPY_ERROR(fmt, args...) \
38 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
39
40 /********************************************************/
41 /* Floppy drive emulation */
42
43 /* Will always be a fixed parameter for us */
44 #define FD_SECTOR_LEN 512
45 #define FD_SECTOR_SC 2 /* Sector size code */
46
47 /* Floppy disk drive emulation */
48 typedef enum fdisk_type_t {
49 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
50 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
51 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
52 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
53 FDRIVE_DISK_NONE = 0x05, /* No disk */
54 } fdisk_type_t;
55
56 typedef enum fdrive_type_t {
57 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
58 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
59 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
60 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
61 } fdrive_type_t;
62
63 typedef enum fdrive_flags_t {
64 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
65 FDRIVE_REVALIDATE = 0x02, /* Revalidated */
66 } fdrive_flags_t;
67
68 typedef enum fdisk_flags_t {
69 FDISK_DBL_SIDES = 0x01,
70 } fdisk_flags_t;
71
72 typedef struct fdrive_t {
73 BlockDriverState *bs;
74 /* Drive status */
75 fdrive_type_t drive;
76 fdrive_flags_t drflags;
77 uint8_t perpendicular; /* 2.88 MB access mode */
78 /* Position */
79 uint8_t head;
80 uint8_t track;
81 uint8_t sect;
82 /* Last operation status */
83 uint8_t dir; /* Direction */
84 uint8_t rw; /* Read/write */
85 /* Media */
86 fdisk_flags_t flags;
87 uint8_t last_sect; /* Nb sector per track */
88 uint8_t max_track; /* Nb of tracks */
89 uint16_t bps; /* Bytes per sector */
90 uint8_t ro; /* Is read-only */
91 } fdrive_t;
92
93 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
94 {
95 /* Drive */
96 drv->bs = bs;
97 drv->drive = FDRIVE_DRV_NONE;
98 drv->drflags = 0;
99 drv->perpendicular = 0;
100 /* Disk */
101 drv->last_sect = 0;
102 drv->max_track = 0;
103 }
104
105 static int _fd_sector (uint8_t head, uint8_t track,
106 uint8_t sect, uint8_t last_sect)
107 {
108 return (((track * 2) + head) * last_sect) + sect - 1;
109 }
110
111 /* Returns current position, in sectors, for given drive */
112 static int fd_sector (fdrive_t *drv)
113 {
114 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
115 }
116
117 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
118 int enable_seek)
119 {
120 uint32_t sector;
121 int ret;
122
123 if (track > drv->max_track ||
124 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
125 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
126 head, track, sect, 1,
127 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
128 drv->max_track, drv->last_sect);
129 return 2;
130 }
131 if (sect > drv->last_sect) {
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 3;
137 }
138 sector = _fd_sector(head, track, sect, drv->last_sect);
139 ret = 0;
140 if (sector != fd_sector(drv)) {
141 #if 0
142 if (!enable_seek) {
143 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
144 head, track, sect, 1, drv->max_track, drv->last_sect);
145 return 4;
146 }
147 #endif
148 drv->head = head;
149 if (drv->track != track)
150 ret = 1;
151 drv->track = track;
152 drv->sect = sect;
153 }
154
155 return ret;
156 }
157
158 /* Set drive back to track 0 */
159 static void fd_recalibrate (fdrive_t *drv)
160 {
161 FLOPPY_DPRINTF("recalibrate\n");
162 drv->head = 0;
163 drv->track = 0;
164 drv->sect = 1;
165 drv->dir = 1;
166 drv->rw = 0;
167 }
168
169 /* Recognize floppy formats */
170 typedef struct fd_format_t {
171 fdrive_type_t drive;
172 fdisk_type_t disk;
173 uint8_t last_sect;
174 uint8_t max_track;
175 uint8_t max_head;
176 const unsigned char *str;
177 } fd_format_t;
178
179 static fd_format_t fd_formats[] = {
180 /* First entry is default format */
181 /* 1.44 MB 3"1/2 floppy disks */
182 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
183 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
184 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
185 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
186 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
187 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
188 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
189 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
190 /* 2.88 MB 3"1/2 floppy disks */
191 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
192 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
193 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
194 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
195 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
196 /* 720 kB 3"1/2 floppy disks */
197 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
198 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
199 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
200 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
201 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
202 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
203 /* 1.2 MB 5"1/4 floppy disks */
204 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
205 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
206 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
207 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
208 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
209 /* 720 kB 5"1/4 floppy disks */
210 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
211 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
212 /* 360 kB 5"1/4 floppy disks */
213 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
214 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
215 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
216 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
217 /* 320 kB 5"1/4 floppy disks */
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
219 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
220 /* 360 kB must match 5"1/4 better than 3"1/2... */
221 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
222 /* end */
223 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
224 };
225
226 /* Revalidate a disk drive after a disk change */
227 static void fd_revalidate (fdrive_t *drv)
228 {
229 fd_format_t *parse;
230 int64_t nb_sectors, size;
231 int i, first_match, match;
232 int nb_heads, max_track, last_sect, ro;
233
234 FLOPPY_DPRINTF("revalidate\n");
235 drv->drflags &= ~FDRIVE_REVALIDATE;
236 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
237 ro = bdrv_is_read_only(drv->bs);
238 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
239 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
240 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
241 nb_heads - 1, max_track, last_sect);
242 } else {
243 bdrv_get_geometry(drv->bs, &nb_sectors);
244 match = -1;
245 first_match = -1;
246 for (i = 0;; i++) {
247 parse = &fd_formats[i];
248 if (parse->drive == FDRIVE_DRV_NONE)
249 break;
250 if (drv->drive == parse->drive ||
251 drv->drive == FDRIVE_DRV_NONE) {
252 size = (parse->max_head + 1) * parse->max_track *
253 parse->last_sect;
254 if (nb_sectors == size) {
255 match = i;
256 break;
257 }
258 if (first_match == -1)
259 first_match = i;
260 }
261 }
262 if (match == -1) {
263 if (first_match == -1)
264 match = 1;
265 else
266 match = first_match;
267 parse = &fd_formats[match];
268 }
269 nb_heads = parse->max_head + 1;
270 max_track = parse->max_track;
271 last_sect = parse->last_sect;
272 drv->drive = parse->drive;
273 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
274 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
275 }
276 if (nb_heads == 1) {
277 drv->flags &= ~FDISK_DBL_SIDES;
278 } else {
279 drv->flags |= FDISK_DBL_SIDES;
280 }
281 drv->max_track = max_track;
282 drv->last_sect = last_sect;
283 drv->ro = ro;
284 } else {
285 FLOPPY_DPRINTF("No disk in drive\n");
286 drv->last_sect = 0;
287 drv->max_track = 0;
288 drv->flags &= ~FDISK_DBL_SIDES;
289 }
290 drv->drflags |= FDRIVE_REVALIDATE;
291 }
292
293 /* Motor control */
294 static void fd_start (fdrive_t *drv)
295 {
296 drv->drflags |= FDRIVE_MOTOR_ON;
297 }
298
299 static void fd_stop (fdrive_t *drv)
300 {
301 drv->drflags &= ~FDRIVE_MOTOR_ON;
302 }
303
304 /* Re-initialise a drives (motor off, repositioned) */
305 static void fd_reset (fdrive_t *drv)
306 {
307 fd_stop(drv);
308 fd_recalibrate(drv);
309 }
310
311 /********************************************************/
312 /* Intel 82078 floppy disk controller emulation */
313
314 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
315 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
316 static int fdctrl_transfer_handler (void *opaque, int nchan,
317 int dma_pos, int dma_len);
318 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
319 static void fdctrl_result_timer(void *opaque);
320
321 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
322 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
323 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
324 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
325 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
326 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
327 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
328 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
329 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
330 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
331
332 enum {
333 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
334 FD_CTRL_RESET = 0x02,
335 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
336 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
337 FD_CTRL_INTR = 0x10,
338 };
339
340 enum {
341 FD_DIR_WRITE = 0,
342 FD_DIR_READ = 1,
343 FD_DIR_SCANE = 2,
344 FD_DIR_SCANL = 3,
345 FD_DIR_SCANH = 4,
346 };
347
348 enum {
349 FD_STATE_CMD = 0x00,
350 FD_STATE_STATUS = 0x01,
351 FD_STATE_DATA = 0x02,
352 FD_STATE_STATE = 0x03,
353 FD_STATE_MULTI = 0x10,
354 FD_STATE_SEEK = 0x20,
355 FD_STATE_FORMAT = 0x40,
356 };
357
358 #define FD_STATE(state) ((state) & FD_STATE_STATE)
359 #define FD_SET_STATE(state, new_state) \
360 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
361 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
362 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
363 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
364
365 struct fdctrl_t {
366 fdctrl_t *fdctrl;
367 /* Controller's identification */
368 uint8_t version;
369 /* HW */
370 int irq_lvl;
371 int dma_chann;
372 uint32_t io_base;
373 /* Controller state */
374 QEMUTimer *result_timer;
375 uint8_t state;
376 uint8_t dma_en;
377 uint8_t cur_drv;
378 uint8_t bootsel;
379 /* Command FIFO */
380 uint8_t fifo[FD_SECTOR_LEN];
381 uint32_t data_pos;
382 uint32_t data_len;
383 uint8_t data_state;
384 uint8_t data_dir;
385 uint8_t int_status;
386 uint8_t eot; /* last wanted sector */
387 /* States kept only to be returned back */
388 /* Timers state */
389 uint8_t timer0;
390 uint8_t timer1;
391 /* precompensation */
392 uint8_t precomp_trk;
393 uint8_t config;
394 uint8_t lock;
395 /* Power down config (also with status regB access mode */
396 uint8_t pwrd;
397 /* Floppy drives */
398 fdrive_t drives[2];
399 };
400
401 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
402 {
403 fdctrl_t *fdctrl = opaque;
404 uint32_t retval;
405
406 switch (reg & 0x07) {
407 case 0x01:
408 retval = fdctrl_read_statusB(fdctrl);
409 break;
410 case 0x02:
411 retval = fdctrl_read_dor(fdctrl);
412 break;
413 case 0x03:
414 retval = fdctrl_read_tape(fdctrl);
415 break;
416 case 0x04:
417 retval = fdctrl_read_main_status(fdctrl);
418 break;
419 case 0x05:
420 retval = fdctrl_read_data(fdctrl);
421 break;
422 case 0x07:
423 retval = fdctrl_read_dir(fdctrl);
424 break;
425 default:
426 retval = (uint32_t)(-1);
427 break;
428 }
429 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
430
431 return retval;
432 }
433
434 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
435 {
436 fdctrl_t *fdctrl = opaque;
437
438 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
439
440 switch (reg & 0x07) {
441 case 0x02:
442 fdctrl_write_dor(fdctrl, value);
443 break;
444 case 0x03:
445 fdctrl_write_tape(fdctrl, value);
446 break;
447 case 0x04:
448 fdctrl_write_rate(fdctrl, value);
449 break;
450 case 0x05:
451 fdctrl_write_data(fdctrl, value);
452 break;
453 default:
454 break;
455 }
456 }
457
458 static void fd_change_cb (void *opaque)
459 {
460 fdrive_t *drv = opaque;
461
462 FLOPPY_DPRINTF("disk change\n");
463 fd_revalidate(drv);
464 #if 0
465 fd_recalibrate(drv);
466 fdctrl_reset_fifo(drv->fdctrl);
467 fdctrl_raise_irq(drv->fdctrl, 0x20);
468 #endif
469 }
470
471 fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
472 uint32_t io_base,
473 BlockDriverState **fds)
474 {
475 fdctrl_t *fdctrl;
476 // int io_mem;
477 int i;
478
479 FLOPPY_DPRINTF("init controller\n");
480 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
481 if (!fdctrl)
482 return NULL;
483 fdctrl->result_timer = qemu_new_timer(vm_clock,
484 fdctrl_result_timer, fdctrl);
485
486 fdctrl->version = 0x90; /* Intel 82078 controller */
487 fdctrl->irq_lvl = irq_lvl;
488 fdctrl->dma_chann = dma_chann;
489 fdctrl->io_base = io_base;
490 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
491 if (fdctrl->dma_chann != -1) {
492 fdctrl->dma_en = 1;
493 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
494 } else {
495 fdctrl->dma_en = 0;
496 }
497 for (i = 0; i < 2; i++) {
498 fd_init(&fdctrl->drives[i], fds[i]);
499 if (fds[i]) {
500 bdrv_set_change_cb(fds[i],
501 &fd_change_cb, &fdctrl->drives[i]);
502 }
503 }
504 fdctrl_reset(fdctrl, 0);
505 fdctrl->state = FD_CTRL_ACTIVE;
506 if (mem_mapped) {
507 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
508 #if 0
509 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
510 cpu_register_physical_memory(base, 0x08, io_mem);
511 #endif
512 } else {
513 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
514 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
515 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
516 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
517 }
518 for (i = 0; i < 2; i++) {
519 fd_revalidate(&fdctrl->drives[i]);
520 }
521
522 return fdctrl;
523 }
524
525 /* XXX: may change if moved to bdrv */
526 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
527 {
528 return fdctrl->drives[drive_num].drive;
529 }
530
531 /* Change IRQ state */
532 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
533 {
534 FLOPPY_DPRINTF("Reset interrupt\n");
535 pic_set_irq(fdctrl->irq_lvl, 0);
536 fdctrl->state &= ~FD_CTRL_INTR;
537 }
538
539 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
540 {
541 if (~(fdctrl->state & FD_CTRL_INTR)) {
542 pic_set_irq(fdctrl->irq_lvl, 1);
543 fdctrl->state |= FD_CTRL_INTR;
544 }
545 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
546 fdctrl->int_status = status;
547 }
548
549 /* Reset controller */
550 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
551 {
552 int i;
553
554 FLOPPY_DPRINTF("reset controller\n");
555 fdctrl_reset_irq(fdctrl);
556 /* Initialise controller */
557 fdctrl->cur_drv = 0;
558 /* FIFO state */
559 fdctrl->data_pos = 0;
560 fdctrl->data_len = 0;
561 fdctrl->data_state = FD_STATE_CMD;
562 fdctrl->data_dir = FD_DIR_WRITE;
563 for (i = 0; i < MAX_FD; i++)
564 fd_reset(&fdctrl->drives[i]);
565 fdctrl_reset_fifo(fdctrl);
566 if (do_irq)
567 fdctrl_raise_irq(fdctrl, 0xc0);
568 }
569
570 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
571 {
572 return &fdctrl->drives[fdctrl->bootsel];
573 }
574
575 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
576 {
577 return &fdctrl->drives[1 - fdctrl->bootsel];
578 }
579
580 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
581 {
582 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
583 }
584
585 /* Status B register : 0x01 (read-only) */
586 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
587 {
588 FLOPPY_DPRINTF("status register: 0x00\n");
589 return 0;
590 }
591
592 /* Digital output register : 0x02 */
593 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
594 {
595 uint32_t retval = 0;
596
597 /* Drive motors state indicators */
598 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
599 retval |= 1 << 5;
600 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
601 retval |= 1 << 4;
602 /* DMA enable */
603 retval |= fdctrl->dma_en << 3;
604 /* Reset indicator */
605 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
606 /* Selected drive */
607 retval |= fdctrl->cur_drv;
608 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
609
610 return retval;
611 }
612
613 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
614 {
615 /* Reset mode */
616 if (fdctrl->state & FD_CTRL_RESET) {
617 if (!(value & 0x04)) {
618 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
619 return;
620 }
621 }
622 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
623 /* Drive motors state indicators */
624 if (value & 0x20)
625 fd_start(drv1(fdctrl));
626 else
627 fd_stop(drv1(fdctrl));
628 if (value & 0x10)
629 fd_start(drv0(fdctrl));
630 else
631 fd_stop(drv0(fdctrl));
632 /* DMA enable */
633 #if 0
634 if (fdctrl->dma_chann != -1)
635 fdctrl->dma_en = 1 - ((value >> 3) & 1);
636 #endif
637 /* Reset */
638 if (!(value & 0x04)) {
639 if (!(fdctrl->state & FD_CTRL_RESET)) {
640 FLOPPY_DPRINTF("controller enter RESET state\n");
641 fdctrl->state |= FD_CTRL_RESET;
642 }
643 } else {
644 if (fdctrl->state & FD_CTRL_RESET) {
645 FLOPPY_DPRINTF("controller out of RESET state\n");
646 fdctrl_reset(fdctrl, 1);
647 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
648 }
649 }
650 /* Selected drive */
651 fdctrl->cur_drv = value & 1;
652 }
653
654 /* Tape drive register : 0x03 */
655 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
656 {
657 uint32_t retval = 0;
658
659 /* Disk boot selection indicator */
660 retval |= fdctrl->bootsel << 2;
661 /* Tape indicators: never allowed */
662 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
663
664 return retval;
665 }
666
667 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
668 {
669 /* Reset mode */
670 if (fdctrl->state & FD_CTRL_RESET) {
671 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
672 return;
673 }
674 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
675 /* Disk boot selection indicator */
676 fdctrl->bootsel = (value >> 2) & 1;
677 /* Tape indicators: never allow */
678 }
679
680 /* Main status register : 0x04 (read) */
681 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
682 {
683 uint32_t retval = 0;
684
685 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
686 if (!(fdctrl->state & FD_CTRL_BUSY)) {
687 /* Data transfer allowed */
688 retval |= 0x80;
689 /* Data transfer direction indicator */
690 if (fdctrl->data_dir == FD_DIR_READ)
691 retval |= 0x40;
692 }
693 /* Should handle 0x20 for SPECIFY command */
694 /* Command busy indicator */
695 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
696 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
697 retval |= 0x10;
698 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
699
700 return retval;
701 }
702
703 /* Data select rate register : 0x04 (write) */
704 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
705 {
706 /* Reset mode */
707 if (fdctrl->state & FD_CTRL_RESET) {
708 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
709 return;
710 }
711 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
712 /* Reset: autoclear */
713 if (value & 0x80) {
714 fdctrl->state |= FD_CTRL_RESET;
715 fdctrl_reset(fdctrl, 1);
716 fdctrl->state &= ~FD_CTRL_RESET;
717 }
718 if (value & 0x40) {
719 fdctrl->state |= FD_CTRL_SLEEP;
720 fdctrl_reset(fdctrl, 1);
721 }
722 // fdctrl.precomp = (value >> 2) & 0x07;
723 }
724
725 /* Digital input register : 0x07 (read-only) */
726 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
727 {
728 uint32_t retval = 0;
729
730 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
731 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
732 retval |= 0x80;
733 if (retval != 0)
734 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
735 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
736 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
737
738 return retval;
739 }
740
741 /* FIFO state control */
742 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
743 {
744 fdctrl->data_dir = FD_DIR_WRITE;
745 fdctrl->data_pos = 0;
746 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
747 }
748
749 /* Set FIFO status for the host to read */
750 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
751 {
752 fdctrl->data_dir = FD_DIR_READ;
753 fdctrl->data_len = fifo_len;
754 fdctrl->data_pos = 0;
755 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
756 if (do_irq)
757 fdctrl_raise_irq(fdctrl, 0x00);
758 }
759
760 /* Set an error: unimplemented/unknown command */
761 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
762 {
763 #if 0
764 fdrive_t *cur_drv;
765
766 cur_drv = get_cur_drv(fdctrl);
767 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
768 fdctrl->fifo[1] = 0x00;
769 fdctrl->fifo[2] = 0x00;
770 fdctrl_set_fifo(fdctrl, 3, 1);
771 #else
772 // fdctrl_reset_fifo(fdctrl);
773 fdctrl->fifo[0] = 0x80;
774 fdctrl_set_fifo(fdctrl, 1, 0);
775 #endif
776 }
777
778 /* Callback for transfer end (stop or abort) */
779 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
780 uint8_t status1, uint8_t status2)
781 {
782 fdrive_t *cur_drv;
783
784 cur_drv = get_cur_drv(fdctrl);
785 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
786 status0, status1, status2,
787 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
788 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
789 fdctrl->fifo[1] = status1;
790 fdctrl->fifo[2] = status2;
791 fdctrl->fifo[3] = cur_drv->track;
792 fdctrl->fifo[4] = cur_drv->head;
793 fdctrl->fifo[5] = cur_drv->sect;
794 fdctrl->fifo[6] = FD_SECTOR_SC;
795 fdctrl->data_dir = FD_DIR_READ;
796 if (fdctrl->state & FD_CTRL_BUSY) {
797 DMA_release_DREQ(fdctrl->dma_chann);
798 fdctrl->state &= ~FD_CTRL_BUSY;
799 }
800 fdctrl_set_fifo(fdctrl, 7, 1);
801 }
802
803 /* Prepare a data transfer (either DMA or FIFO) */
804 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
805 {
806 fdrive_t *cur_drv;
807 uint8_t kh, kt, ks;
808 int did_seek;
809
810 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
811 cur_drv = get_cur_drv(fdctrl);
812 kt = fdctrl->fifo[2];
813 kh = fdctrl->fifo[3];
814 ks = fdctrl->fifo[4];
815 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
816 fdctrl->cur_drv, kh, kt, ks,
817 _fd_sector(kh, kt, ks, cur_drv->last_sect));
818 did_seek = 0;
819 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
820 case 2:
821 /* sect too big */
822 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
823 fdctrl->fifo[3] = kt;
824 fdctrl->fifo[4] = kh;
825 fdctrl->fifo[5] = ks;
826 return;
827 case 3:
828 /* track too big */
829 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
830 fdctrl->fifo[3] = kt;
831 fdctrl->fifo[4] = kh;
832 fdctrl->fifo[5] = ks;
833 return;
834 case 4:
835 /* No seek enabled */
836 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
837 fdctrl->fifo[3] = kt;
838 fdctrl->fifo[4] = kh;
839 fdctrl->fifo[5] = ks;
840 return;
841 case 1:
842 did_seek = 1;
843 break;
844 default:
845 break;
846 }
847 /* Set the FIFO state */
848 fdctrl->data_dir = direction;
849 fdctrl->data_pos = 0;
850 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
851 if (fdctrl->fifo[0] & 0x80)
852 fdctrl->data_state |= FD_STATE_MULTI;
853 else
854 fdctrl->data_state &= ~FD_STATE_MULTI;
855 if (did_seek)
856 fdctrl->data_state |= FD_STATE_SEEK;
857 else
858 fdctrl->data_state &= ~FD_STATE_SEEK;
859 if (fdctrl->fifo[5] == 00) {
860 fdctrl->data_len = fdctrl->fifo[8];
861 } else {
862 int tmp;
863 fdctrl->data_len = 128 << fdctrl->fifo[5];
864 tmp = (cur_drv->last_sect - ks + 1);
865 if (fdctrl->fifo[0] & 0x80)
866 tmp += cur_drv->last_sect;
867 fdctrl->data_len *= tmp;
868 }
869 fdctrl->eot = fdctrl->fifo[6];
870 if (fdctrl->dma_en) {
871 int dma_mode;
872 /* DMA transfer are enabled. Check if DMA channel is well programmed */
873 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
874 dma_mode = (dma_mode >> 2) & 3;
875 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
876 dma_mode, direction,
877 (128 << fdctrl->fifo[5]) *
878 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
879 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
880 direction == FD_DIR_SCANH) && dma_mode == 0) ||
881 (direction == FD_DIR_WRITE && dma_mode == 2) ||
882 (direction == FD_DIR_READ && dma_mode == 1)) {
883 /* No access is allowed until DMA transfer has completed */
884 fdctrl->state |= FD_CTRL_BUSY;
885 /* Now, we just have to wait for the DMA controller to
886 * recall us...
887 */
888 DMA_hold_DREQ(fdctrl->dma_chann);
889 DMA_schedule(fdctrl->dma_chann);
890 return;
891 } else {
892 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
893 }
894 }
895 FLOPPY_DPRINTF("start non-DMA transfer\n");
896 /* IO based transfer: calculate len */
897 fdctrl_raise_irq(fdctrl, 0x00);
898
899 return;
900 }
901
902 /* Prepare a transfer of deleted data */
903 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
904 {
905 /* We don't handle deleted data,
906 * so we don't return *ANYTHING*
907 */
908 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
909 }
910
911 /* handlers for DMA transfers */
912 static int fdctrl_transfer_handler (void *opaque, int nchan,
913 int dma_pos, int dma_len)
914 {
915 fdctrl_t *fdctrl;
916 fdrive_t *cur_drv;
917 int len, start_pos, rel_pos;
918 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
919
920 fdctrl = opaque;
921 if (!(fdctrl->state & FD_CTRL_BUSY)) {
922 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
923 return 0;
924 }
925 cur_drv = get_cur_drv(fdctrl);
926 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
927 fdctrl->data_dir == FD_DIR_SCANH)
928 status2 = 0x04;
929 if (dma_len > fdctrl->data_len)
930 dma_len = fdctrl->data_len;
931 if (cur_drv->bs == NULL) {
932 if (fdctrl->data_dir == FD_DIR_WRITE)
933 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
934 else
935 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
936 len = 0;
937 goto transfer_error;
938 }
939 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
940 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
941 len = dma_len - fdctrl->data_pos;
942 if (len + rel_pos > FD_SECTOR_LEN)
943 len = FD_SECTOR_LEN - rel_pos;
944 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
945 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
946 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
947 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
948 fd_sector(cur_drv) * 512, addr);
949 if (fdctrl->data_dir != FD_DIR_WRITE ||
950 len < FD_SECTOR_LEN || rel_pos != 0) {
951 /* READ & SCAN commands and realign to a sector for WRITE */
952 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
953 fdctrl->fifo, 1) < 0) {
954 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
955 fd_sector(cur_drv));
956 /* Sure, image size is too small... */
957 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
958 }
959 }
960 switch (fdctrl->data_dir) {
961 case FD_DIR_READ:
962 /* READ commands */
963 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
964 fdctrl->data_pos, len);
965 /* cpu_physical_memory_write(addr + fdctrl->data_pos, */
966 /* fdctrl->fifo + rel_pos, len); */
967 break;
968 case FD_DIR_WRITE:
969 /* WRITE commands */
970 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
971 fdctrl->data_pos, len);
972 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
973 /* fdctrl->fifo + rel_pos, len); */
974 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
975 fdctrl->fifo, 1) < 0) {
976 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
977 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
978 goto transfer_error;
979 }
980 break;
981 default:
982 /* SCAN commands */
983 {
984 uint8_t tmpbuf[FD_SECTOR_LEN];
985 int ret;
986 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
987 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
988 /* tmpbuf, len); */
989 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
990 if (ret == 0) {
991 status2 = 0x08;
992 goto end_transfer;
993 }
994 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
995 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
996 status2 = 0x00;
997 goto end_transfer;
998 }
999 }
1000 break;
1001 }
1002 fdctrl->data_pos += len;
1003 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1004 if (rel_pos == 0) {
1005 /* Seek to next sector */
1006 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1007 cur_drv->head, cur_drv->track, cur_drv->sect,
1008 fd_sector(cur_drv),
1009 fdctrl->data_pos - size);
1010 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1011 error in fact */
1012 if (cur_drv->sect >= cur_drv->last_sect ||
1013 cur_drv->sect == fdctrl->eot) {
1014 cur_drv->sect = 1;
1015 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1016 if (cur_drv->head == 0 &&
1017 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1018 cur_drv->head = 1;
1019 } else {
1020 cur_drv->head = 0;
1021 cur_drv->track++;
1022 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1023 break;
1024 }
1025 } else {
1026 cur_drv->track++;
1027 break;
1028 }
1029 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1030 cur_drv->head, cur_drv->track,
1031 cur_drv->sect, fd_sector(cur_drv));
1032 } else {
1033 cur_drv->sect++;
1034 }
1035 }
1036 }
1037 end_transfer:
1038 len = fdctrl->data_pos - start_pos;
1039 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1040 fdctrl->data_pos, len, fdctrl->data_len);
1041 if (fdctrl->data_dir == FD_DIR_SCANE ||
1042 fdctrl->data_dir == FD_DIR_SCANL ||
1043 fdctrl->data_dir == FD_DIR_SCANH)
1044 status2 = 0x08;
1045 if (FD_DID_SEEK(fdctrl->data_state))
1046 status0 |= 0x20;
1047 fdctrl->data_len -= len;
1048 // if (fdctrl->data_len == 0)
1049 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1050 transfer_error:
1051
1052 return len;
1053 }
1054
1055 /* Data register : 0x05 */
1056 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1057 {
1058 fdrive_t *cur_drv;
1059 uint32_t retval = 0;
1060 int pos, len;
1061
1062 cur_drv = get_cur_drv(fdctrl);
1063 fdctrl->state &= ~FD_CTRL_SLEEP;
1064 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1065 FLOPPY_ERROR("can't read data in CMD state\n");
1066 return 0;
1067 }
1068 pos = fdctrl->data_pos;
1069 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1070 pos %= FD_SECTOR_LEN;
1071 if (pos == 0) {
1072 len = fdctrl->data_len - fdctrl->data_pos;
1073 if (len > FD_SECTOR_LEN)
1074 len = FD_SECTOR_LEN;
1075 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1076 fdctrl->fifo, len);
1077 }
1078 }
1079 retval = fdctrl->fifo[pos];
1080 if (++fdctrl->data_pos == fdctrl->data_len) {
1081 fdctrl->data_pos = 0;
1082 /* Switch from transfer mode to status mode
1083 * then from status mode to command mode
1084 */
1085 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1086 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1087 } else {
1088 fdctrl_reset_fifo(fdctrl);
1089 fdctrl_reset_irq(fdctrl);
1090 }
1091 }
1092 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1093
1094 return retval;
1095 }
1096
1097 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1098 {
1099 fdrive_t *cur_drv;
1100 uint8_t kh, kt, ks;
1101 int did_seek;
1102
1103 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1104 cur_drv = get_cur_drv(fdctrl);
1105 kt = fdctrl->fifo[6];
1106 kh = fdctrl->fifo[7];
1107 ks = fdctrl->fifo[8];
1108 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1109 fdctrl->cur_drv, kh, kt, ks,
1110 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1111 did_seek = 0;
1112 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1113 case 2:
1114 /* sect too big */
1115 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1116 fdctrl->fifo[3] = kt;
1117 fdctrl->fifo[4] = kh;
1118 fdctrl->fifo[5] = ks;
1119 return;
1120 case 3:
1121 /* track too big */
1122 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1123 fdctrl->fifo[3] = kt;
1124 fdctrl->fifo[4] = kh;
1125 fdctrl->fifo[5] = ks;
1126 return;
1127 case 4:
1128 /* No seek enabled */
1129 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1130 fdctrl->fifo[3] = kt;
1131 fdctrl->fifo[4] = kh;
1132 fdctrl->fifo[5] = ks;
1133 return;
1134 case 1:
1135 did_seek = 1;
1136 fdctrl->data_state |= FD_STATE_SEEK;
1137 break;
1138 default:
1139 break;
1140 }
1141 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1142 if (cur_drv->bs == NULL ||
1143 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1144 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1145 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1146 } else {
1147 if (cur_drv->sect == cur_drv->last_sect) {
1148 fdctrl->data_state &= ~FD_STATE_FORMAT;
1149 /* Last sector done */
1150 if (FD_DID_SEEK(fdctrl->data_state))
1151 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1152 else
1153 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1154 } else {
1155 /* More to do */
1156 fdctrl->data_pos = 0;
1157 fdctrl->data_len = 4;
1158 }
1159 }
1160 }
1161
1162 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1163 {
1164 fdrive_t *cur_drv;
1165
1166 cur_drv = get_cur_drv(fdctrl);
1167 /* Reset mode */
1168 if (fdctrl->state & FD_CTRL_RESET) {
1169 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1170 return;
1171 }
1172 fdctrl->state &= ~FD_CTRL_SLEEP;
1173 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1174 FLOPPY_ERROR("can't write data in status mode\n");
1175 return;
1176 }
1177 /* Is it write command time ? */
1178 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1179 /* FIFO data write */
1180 fdctrl->fifo[fdctrl->data_pos++] = value;
1181 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1182 fdctrl->data_pos == fdctrl->data_len) {
1183 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1184 fdctrl->fifo, FD_SECTOR_LEN);
1185 }
1186 /* Switch from transfer mode to status mode
1187 * then from status mode to command mode
1188 */
1189 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1190 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1191 return;
1192 }
1193 if (fdctrl->data_pos == 0) {
1194 /* Command */
1195 switch (value & 0x5F) {
1196 case 0x46:
1197 /* READ variants */
1198 FLOPPY_DPRINTF("READ command\n");
1199 /* 8 parameters cmd */
1200 fdctrl->data_len = 9;
1201 goto enqueue;
1202 case 0x4C:
1203 /* READ_DELETED variants */
1204 FLOPPY_DPRINTF("READ_DELETED command\n");
1205 /* 8 parameters cmd */
1206 fdctrl->data_len = 9;
1207 goto enqueue;
1208 case 0x50:
1209 /* SCAN_EQUAL variants */
1210 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1211 /* 8 parameters cmd */
1212 fdctrl->data_len = 9;
1213 goto enqueue;
1214 case 0x56:
1215 /* VERIFY variants */
1216 FLOPPY_DPRINTF("VERIFY command\n");
1217 /* 8 parameters cmd */
1218 fdctrl->data_len = 9;
1219 goto enqueue;
1220 case 0x59:
1221 /* SCAN_LOW_OR_EQUAL variants */
1222 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1223 /* 8 parameters cmd */
1224 fdctrl->data_len = 9;
1225 goto enqueue;
1226 case 0x5D:
1227 /* SCAN_HIGH_OR_EQUAL variants */
1228 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1229 /* 8 parameters cmd */
1230 fdctrl->data_len = 9;
1231 goto enqueue;
1232 default:
1233 break;
1234 }
1235 switch (value & 0x7F) {
1236 case 0x45:
1237 /* WRITE variants */
1238 FLOPPY_DPRINTF("WRITE command\n");
1239 /* 8 parameters cmd */
1240 fdctrl->data_len = 9;
1241 goto enqueue;
1242 case 0x49:
1243 /* WRITE_DELETED variants */
1244 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1245 /* 8 parameters cmd */
1246 fdctrl->data_len = 9;
1247 goto enqueue;
1248 default:
1249 break;
1250 }
1251 switch (value) {
1252 case 0x03:
1253 /* SPECIFY */
1254 FLOPPY_DPRINTF("SPECIFY command\n");
1255 /* 1 parameter cmd */
1256 fdctrl->data_len = 3;
1257 goto enqueue;
1258 case 0x04:
1259 /* SENSE_DRIVE_STATUS */
1260 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1261 /* 1 parameter cmd */
1262 fdctrl->data_len = 2;
1263 goto enqueue;
1264 case 0x07:
1265 /* RECALIBRATE */
1266 FLOPPY_DPRINTF("RECALIBRATE command\n");
1267 /* 1 parameter cmd */
1268 fdctrl->data_len = 2;
1269 goto enqueue;
1270 case 0x08:
1271 /* SENSE_INTERRUPT_STATUS */
1272 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1273 fdctrl->int_status);
1274 /* No parameters cmd: returns status if no interrupt */
1275 #if 0
1276 fdctrl->fifo[0] =
1277 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1278 #else
1279 /* XXX: int_status handling is broken for read/write
1280 commands, so we do this hack. It should be suppressed
1281 ASAP */
1282 fdctrl->fifo[0] =
1283 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1284 #endif
1285 fdctrl->fifo[1] = cur_drv->track;
1286 fdctrl_set_fifo(fdctrl, 2, 0);
1287 fdctrl_reset_irq(fdctrl);
1288 fdctrl->int_status = 0xC0;
1289 return;
1290 case 0x0E:
1291 /* DUMPREG */
1292 FLOPPY_DPRINTF("DUMPREG command\n");
1293 /* Drives position */
1294 fdctrl->fifo[0] = drv0(fdctrl)->track;
1295 fdctrl->fifo[1] = drv1(fdctrl)->track;
1296 fdctrl->fifo[2] = 0;
1297 fdctrl->fifo[3] = 0;
1298 /* timers */
1299 fdctrl->fifo[4] = fdctrl->timer0;
1300 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1301 fdctrl->fifo[6] = cur_drv->last_sect;
1302 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1303 (cur_drv->perpendicular << 2);
1304 fdctrl->fifo[8] = fdctrl->config;
1305 fdctrl->fifo[9] = fdctrl->precomp_trk;
1306 fdctrl_set_fifo(fdctrl, 10, 0);
1307 return;
1308 case 0x0F:
1309 /* SEEK */
1310 FLOPPY_DPRINTF("SEEK command\n");
1311 /* 2 parameters cmd */
1312 fdctrl->data_len = 3;
1313 goto enqueue;
1314 case 0x10:
1315 /* VERSION */
1316 FLOPPY_DPRINTF("VERSION command\n");
1317 /* No parameters cmd */
1318 /* Controller's version */
1319 fdctrl->fifo[0] = fdctrl->version;
1320 fdctrl_set_fifo(fdctrl, 1, 1);
1321 return;
1322 case 0x12:
1323 /* PERPENDICULAR_MODE */
1324 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1325 /* 1 parameter cmd */
1326 fdctrl->data_len = 2;
1327 goto enqueue;
1328 case 0x13:
1329 /* CONFIGURE */
1330 FLOPPY_DPRINTF("CONFIGURE command\n");
1331 /* 3 parameters cmd */
1332 fdctrl->data_len = 4;
1333 goto enqueue;
1334 case 0x14:
1335 /* UNLOCK */
1336 FLOPPY_DPRINTF("UNLOCK command\n");
1337 /* No parameters cmd */
1338 fdctrl->lock = 0;
1339 fdctrl->fifo[0] = 0;
1340 fdctrl_set_fifo(fdctrl, 1, 0);
1341 return;
1342 case 0x17:
1343 /* POWERDOWN_MODE */
1344 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1345 /* 2 parameters cmd */
1346 fdctrl->data_len = 3;
1347 goto enqueue;
1348 case 0x18:
1349 /* PART_ID */
1350 FLOPPY_DPRINTF("PART_ID command\n");
1351 /* No parameters cmd */
1352 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1353 fdctrl_set_fifo(fdctrl, 1, 0);
1354 return;
1355 case 0x2C:
1356 /* SAVE */
1357 FLOPPY_DPRINTF("SAVE command\n");
1358 /* No parameters cmd */
1359 fdctrl->fifo[0] = 0;
1360 fdctrl->fifo[1] = 0;
1361 /* Drives position */
1362 fdctrl->fifo[2] = drv0(fdctrl)->track;
1363 fdctrl->fifo[3] = drv1(fdctrl)->track;
1364 fdctrl->fifo[4] = 0;
1365 fdctrl->fifo[5] = 0;
1366 /* timers */
1367 fdctrl->fifo[6] = fdctrl->timer0;
1368 fdctrl->fifo[7] = fdctrl->timer1;
1369 fdctrl->fifo[8] = cur_drv->last_sect;
1370 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1371 (cur_drv->perpendicular << 2);
1372 fdctrl->fifo[10] = fdctrl->config;
1373 fdctrl->fifo[11] = fdctrl->precomp_trk;
1374 fdctrl->fifo[12] = fdctrl->pwrd;
1375 fdctrl->fifo[13] = 0;
1376 fdctrl->fifo[14] = 0;
1377 fdctrl_set_fifo(fdctrl, 15, 1);
1378 return;
1379 case 0x33:
1380 /* OPTION */
1381 FLOPPY_DPRINTF("OPTION command\n");
1382 /* 1 parameter cmd */
1383 fdctrl->data_len = 2;
1384 goto enqueue;
1385 case 0x42:
1386 /* READ_TRACK */
1387 FLOPPY_DPRINTF("READ_TRACK command\n");
1388 /* 8 parameters cmd */
1389 fdctrl->data_len = 9;
1390 goto enqueue;
1391 case 0x4A:
1392 /* READ_ID */
1393 FLOPPY_DPRINTF("READ_ID command\n");
1394 /* 1 parameter cmd */
1395 fdctrl->data_len = 2;
1396 goto enqueue;
1397 case 0x4C:
1398 /* RESTORE */
1399 FLOPPY_DPRINTF("RESTORE command\n");
1400 /* 17 parameters cmd */
1401 fdctrl->data_len = 18;
1402 goto enqueue;
1403 case 0x4D:
1404 /* FORMAT_TRACK */
1405 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1406 /* 5 parameters cmd */
1407 fdctrl->data_len = 6;
1408 goto enqueue;
1409 case 0x8E:
1410 /* DRIVE_SPECIFICATION_COMMAND */
1411 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1412 /* 5 parameters cmd */
1413 fdctrl->data_len = 6;
1414 goto enqueue;
1415 case 0x8F:
1416 /* RELATIVE_SEEK_OUT */
1417 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1418 /* 2 parameters cmd */
1419 fdctrl->data_len = 3;
1420 goto enqueue;
1421 case 0x94:
1422 /* LOCK */
1423 FLOPPY_DPRINTF("LOCK command\n");
1424 /* No parameters cmd */
1425 fdctrl->lock = 1;
1426 fdctrl->fifo[0] = 0x10;
1427 fdctrl_set_fifo(fdctrl, 1, 1);
1428 return;
1429 case 0xCD:
1430 /* FORMAT_AND_WRITE */
1431 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1432 /* 10 parameters cmd */
1433 fdctrl->data_len = 11;
1434 goto enqueue;
1435 case 0xCF:
1436 /* RELATIVE_SEEK_IN */
1437 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1438 /* 2 parameters cmd */
1439 fdctrl->data_len = 3;
1440 goto enqueue;
1441 default:
1442 /* Unknown command */
1443 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1444 fdctrl_unimplemented(fdctrl);
1445 return;
1446 }
1447 }
1448 enqueue:
1449 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1450 fdctrl->fifo[fdctrl->data_pos] = value;
1451 if (++fdctrl->data_pos == fdctrl->data_len) {
1452 /* We now have all parameters
1453 * and will be able to treat the command
1454 */
1455 if (fdctrl->data_state & FD_STATE_FORMAT) {
1456 fdctrl_format_sector(fdctrl);
1457 return;
1458 }
1459 switch (fdctrl->fifo[0] & 0x1F) {
1460 case 0x06:
1461 {
1462 /* READ variants */
1463 FLOPPY_DPRINTF("treat READ command\n");
1464 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1465 return;
1466 }
1467 case 0x0C:
1468 /* READ_DELETED variants */
1469 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1470 FLOPPY_ERROR("treat READ_DELETED command\n");
1471 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1472 return;
1473 case 0x16:
1474 /* VERIFY variants */
1475 // FLOPPY_DPRINTF("treat VERIFY command\n");
1476 FLOPPY_ERROR("treat VERIFY command\n");
1477 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1478 return;
1479 case 0x10:
1480 /* SCAN_EQUAL variants */
1481 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1482 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1483 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1484 return;
1485 case 0x19:
1486 /* SCAN_LOW_OR_EQUAL variants */
1487 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1488 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1489 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1490 return;
1491 case 0x1D:
1492 /* SCAN_HIGH_OR_EQUAL variants */
1493 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1494 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1495 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1496 return;
1497 default:
1498 break;
1499 }
1500 switch (fdctrl->fifo[0] & 0x3F) {
1501 case 0x05:
1502 /* WRITE variants */
1503 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1504 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1505 return;
1506 case 0x09:
1507 /* WRITE_DELETED variants */
1508 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1509 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1510 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1511 return;
1512 default:
1513 break;
1514 }
1515 switch (fdctrl->fifo[0]) {
1516 case 0x03:
1517 /* SPECIFY */
1518 FLOPPY_DPRINTF("treat SPECIFY command\n");
1519 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1520 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1521 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1522 /* No result back */
1523 fdctrl_reset_fifo(fdctrl);
1524 break;
1525 case 0x04:
1526 /* SENSE_DRIVE_STATUS */
1527 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1528 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1529 cur_drv = get_cur_drv(fdctrl);
1530 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1531 /* 1 Byte status back */
1532 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1533 (cur_drv->track == 0 ? 0x10 : 0x00) |
1534 (cur_drv->head << 2) |
1535 fdctrl->cur_drv |
1536 0x28;
1537 fdctrl_set_fifo(fdctrl, 1, 0);
1538 break;
1539 case 0x07:
1540 /* RECALIBRATE */
1541 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1542 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1543 cur_drv = get_cur_drv(fdctrl);
1544 fd_recalibrate(cur_drv);
1545 fdctrl_reset_fifo(fdctrl);
1546 /* Raise Interrupt */
1547 fdctrl_raise_irq(fdctrl, 0x20);
1548 break;
1549 case 0x0F:
1550 /* SEEK */
1551 FLOPPY_DPRINTF("treat SEEK command\n");
1552 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1553 cur_drv = get_cur_drv(fdctrl);
1554 fd_start(cur_drv);
1555 if (fdctrl->fifo[2] <= cur_drv->track)
1556 cur_drv->dir = 1;
1557 else
1558 cur_drv->dir = 0;
1559 fdctrl_reset_fifo(fdctrl);
1560 if (fdctrl->fifo[2] > cur_drv->max_track) {
1561 fdctrl_raise_irq(fdctrl, 0x60);
1562 } else {
1563 cur_drv->track = fdctrl->fifo[2];
1564 /* Raise Interrupt */
1565 fdctrl_raise_irq(fdctrl, 0x20);
1566 }
1567 break;
1568 case 0x12:
1569 /* PERPENDICULAR_MODE */
1570 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1571 if (fdctrl->fifo[1] & 0x80)
1572 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1573 /* No result back */
1574 fdctrl_reset_fifo(fdctrl);
1575 break;
1576 case 0x13:
1577 /* CONFIGURE */
1578 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1579 fdctrl->config = fdctrl->fifo[2];
1580 fdctrl->precomp_trk = fdctrl->fifo[3];
1581 /* No result back */
1582 fdctrl_reset_fifo(fdctrl);
1583 break;
1584 case 0x17:
1585 /* POWERDOWN_MODE */
1586 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1587 fdctrl->pwrd = fdctrl->fifo[1];
1588 fdctrl->fifo[0] = fdctrl->fifo[1];
1589 fdctrl_set_fifo(fdctrl, 1, 1);
1590 break;
1591 case 0x33:
1592 /* OPTION */
1593 FLOPPY_DPRINTF("treat OPTION command\n");
1594 /* No result back */
1595 fdctrl_reset_fifo(fdctrl);
1596 break;
1597 case 0x42:
1598 /* READ_TRACK */
1599 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1600 FLOPPY_ERROR("treat READ_TRACK command\n");
1601 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1602 break;
1603 case 0x4A:
1604 /* READ_ID */
1605 FLOPPY_DPRINTF("treat READ_ID command\n");
1606 /* XXX: should set main status register to busy */
1607 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1608 qemu_mod_timer(fdctrl->result_timer,
1609 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1610 break;
1611 case 0x4C:
1612 /* RESTORE */
1613 FLOPPY_DPRINTF("treat RESTORE command\n");
1614 /* Drives position */
1615 drv0(fdctrl)->track = fdctrl->fifo[3];
1616 drv1(fdctrl)->track = fdctrl->fifo[4];
1617 /* timers */
1618 fdctrl->timer0 = fdctrl->fifo[7];
1619 fdctrl->timer1 = fdctrl->fifo[8];
1620 cur_drv->last_sect = fdctrl->fifo[9];
1621 fdctrl->lock = fdctrl->fifo[10] >> 7;
1622 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1623 fdctrl->config = fdctrl->fifo[11];
1624 fdctrl->precomp_trk = fdctrl->fifo[12];
1625 fdctrl->pwrd = fdctrl->fifo[13];
1626 fdctrl_reset_fifo(fdctrl);
1627 break;
1628 case 0x4D:
1629 /* FORMAT_TRACK */
1630 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1631 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1632 cur_drv = get_cur_drv(fdctrl);
1633 fdctrl->data_state |= FD_STATE_FORMAT;
1634 if (fdctrl->fifo[0] & 0x80)
1635 fdctrl->data_state |= FD_STATE_MULTI;
1636 else
1637 fdctrl->data_state &= ~FD_STATE_MULTI;
1638 fdctrl->data_state &= ~FD_STATE_SEEK;
1639 cur_drv->bps =
1640 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1641 #if 0
1642 cur_drv->last_sect =
1643 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1644 fdctrl->fifo[3] / 2;
1645 #else
1646 cur_drv->last_sect = fdctrl->fifo[3];
1647 #endif
1648 /* Bochs BIOS is buggy and don't send format informations
1649 * for each sector. So, pretend all's done right now...
1650 */
1651 fdctrl->data_state &= ~FD_STATE_FORMAT;
1652 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1653 break;
1654 case 0x8E:
1655 /* DRIVE_SPECIFICATION_COMMAND */
1656 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1657 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1658 /* Command parameters done */
1659 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1660 fdctrl->fifo[0] = fdctrl->fifo[1];
1661 fdctrl->fifo[2] = 0;
1662 fdctrl->fifo[3] = 0;
1663 fdctrl_set_fifo(fdctrl, 4, 1);
1664 } else {
1665 fdctrl_reset_fifo(fdctrl);
1666 }
1667 } else if (fdctrl->data_len > 7) {
1668 /* ERROR */
1669 fdctrl->fifo[0] = 0x80 |
1670 (cur_drv->head << 2) | fdctrl->cur_drv;
1671 fdctrl_set_fifo(fdctrl, 1, 1);
1672 }
1673 break;
1674 case 0x8F:
1675 /* RELATIVE_SEEK_OUT */
1676 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1677 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1678 cur_drv = get_cur_drv(fdctrl);
1679 fd_start(cur_drv);
1680 cur_drv->dir = 0;
1681 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1682 cur_drv->track = cur_drv->max_track - 1;
1683 } else {
1684 cur_drv->track += fdctrl->fifo[2];
1685 }
1686 fdctrl_reset_fifo(fdctrl);
1687 fdctrl_raise_irq(fdctrl, 0x20);
1688 break;
1689 case 0xCD:
1690 /* FORMAT_AND_WRITE */
1691 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1692 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1693 fdctrl_unimplemented(fdctrl);
1694 break;
1695 case 0xCF:
1696 /* RELATIVE_SEEK_IN */
1697 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1698 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1699 cur_drv = get_cur_drv(fdctrl);
1700 fd_start(cur_drv);
1701 cur_drv->dir = 1;
1702 if (fdctrl->fifo[2] > cur_drv->track) {
1703 cur_drv->track = 0;
1704 } else {
1705 cur_drv->track -= fdctrl->fifo[2];
1706 }
1707 fdctrl_reset_fifo(fdctrl);
1708 /* Raise Interrupt */
1709 fdctrl_raise_irq(fdctrl, 0x20);
1710 break;
1711 }
1712 }
1713 }
1714
1715 static void fdctrl_result_timer(void *opaque)
1716 {
1717 fdctrl_t *fdctrl = opaque;
1718 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1719 }
Qemu copy for testing