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8977f3c1 1/*
890fa6be 2 * QEMU Floppy disk emulator (Intel 82078)
8977f3c1
FB		 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 */
8977f3c1
FB		 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...) \
32do { printf("FLOPPY: " fmt , ##args); } while (0)
33#else
34#define FLOPPY_DPRINTF(fmt, args...)
35#endif
36
37#define FLOPPY_ERROR(fmt, args...) \
38do { 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 */
48typedef 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 */
baca51fa
FB		 52 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
53 FDRIVE_DISK_NONE = 0x05, /* No disk */
8977f3c1
FB		 54} fdisk_type_t;
55
56typedef 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
baca51fa
FB		 63typedef enum fdrive_flags_t {
64 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
65 FDRIVE_REVALIDATE = 0x02, /* Revalidated */
66} fdrive_flags_t;
67
68typedef enum fdisk_flags_t {
69 FDISK_DBL_SIDES = 0x01,
70} fdisk_flags_t;
71
8977f3c1
FB		 72typedef struct fdrive_t {
73 BlockDriverState *bs;
74 /* Drive status */
75 fdrive_type_t drive;
baca51fa 76 fdrive_flags_t drflags;
8977f3c1 77 uint8_t perpendicular; /* 2.88 MB access mode */
8977f3c1
FB		 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 */
baca51fa 86 fdisk_flags_t flags;
8977f3c1
FB		 87 uint8_t last_sect; /* Nb sector per track */
88 uint8_t max_track; /* Nb of tracks */
baca51fa 89 uint16_t bps; /* Bytes per sector */
8977f3c1
FB		 90 uint8_t ro; /* Is read-only */
91} fdrive_t;
92
caed8802 93static void fd_init (fdrive_t *drv, BlockDriverState *bs)
8977f3c1
FB		 94{
95 /* Drive */
caed8802 96 drv->bs = bs;
b939777c 97 drv->drive = FDRIVE_DRV_NONE;
baca51fa 98 drv->drflags = 0;
8977f3c1 99 drv->perpendicular = 0;
8977f3c1 100 /* Disk */
baca51fa 101 drv->last_sect = 0;
8977f3c1
FB		 102 drv->max_track = 0;
103}
104
105static 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 */
112static int fd_sector (fdrive_t *drv)
113{
114 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
115}
116
117static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
118 int enable_seek)
119{
120 uint32_t sector;
baca51fa
FB		 121 int ret;
122
123 if (track > drv->max_track ||
124 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
ed5fd2cc
FB		 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);
8977f3c1
FB		 129 return 2;
130 }
131 if (sect > drv->last_sect) {
ed5fd2cc
FB		 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);
8977f3c1
FB		 136 return 3;
137 }
138 sector = _fd_sector(head, track, sect, drv->last_sect);
baca51fa 139 ret = 0;
8977f3c1
FB		 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;
baca51fa
FB		 149 if (drv->track != track)
150 ret = 1;
8977f3c1
FB		 151 drv->track = track;
152 drv->sect = sect;
8977f3c1
FB		 153 }
154
baca51fa 155 return ret;
8977f3c1
FB		 156}
157
158/* Set drive back to track 0 */
159static 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
a541f297
FB		 169/* Recognize floppy formats */
170typedef 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
179static 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
8977f3c1 226/* Revalidate a disk drive after a disk change */
caed8802 227static void fd_revalidate (fdrive_t *drv)
8977f3c1 228{
a541f297
FB		 229 fd_format_t *parse;
230 int64_t nb_sectors, size;
231 int i, first_match, match;
baca51fa 232 int nb_heads, max_track, last_sect, ro;
8977f3c1
FB		 233
234 FLOPPY_DPRINTF("revalidate\n");
baca51fa 235 drv->drflags &= ~FDRIVE_REVALIDATE;
a541f297 236 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
baca51fa 237 ro = bdrv_is_read_only(drv->bs);
a541f297 238 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
baca51fa 239 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
ed5fd2cc
FB		 240 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
241 nb_heads - 1, max_track, last_sect);
a541f297
FB		 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;
ed5fd2cc
FB		 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");
a541f297 275 }
baca51fa
FB		 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;
baca51fa 283 drv->ro = ro;
8977f3c1 284 } else {
ed5fd2cc 285 FLOPPY_DPRINTF("No disk in drive\n");
baca51fa
FB		 286 drv->last_sect = 0;
287 drv->max_track = 0;
288 drv->flags &= ~FDISK_DBL_SIDES;
8977f3c1 289 }
baca51fa 290 drv->drflags |= FDRIVE_REVALIDATE;
caed8802
FB		 291}
292
8977f3c1
FB		 293/* Motor control */
294static void fd_start (fdrive_t *drv)
295{
baca51fa 296 drv->drflags |= FDRIVE_MOTOR_ON;
8977f3c1
FB		 297}
298
299static void fd_stop (fdrive_t *drv)
300{
baca51fa 301 drv->drflags &= ~FDRIVE_MOTOR_ON;
8977f3c1
FB		 302}
303
304/* Re-initialise a drives (motor off, repositioned) */
305static void fd_reset (fdrive_t *drv)
306{
307 fd_stop(drv);
308 fd_recalibrate(drv);
309}
310
311/********************************************************/
4b19ec0c 312/* Intel 82078 floppy disk controller emulation */
8977f3c1 313
baca51fa
FB		 314static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
315static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
f9e92e97 316static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
baca51fa 317static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
ed5fd2cc 318static void fdctrl_result_timer(void *opaque);
baca51fa
FB		 319
320static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
321static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
322static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
323static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
324static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
325static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
326static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
327static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
328static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
329static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
8977f3c1
FB		 330
331enum {
ed5fd2cc 332 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
8977f3c1 333 FD_CTRL_RESET = 0x02,
ed5fd2cc
FB		 334 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
335 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
8977f3c1
FB		 336 FD_CTRL_INTR = 0x10,
337};
338
339enum {
340 FD_DIR_WRITE = 0,
341 FD_DIR_READ = 1,
342 FD_DIR_SCANE = 2,
343 FD_DIR_SCANL = 3,
344 FD_DIR_SCANH = 4,
345};
346
347enum {
348 FD_STATE_CMD = 0x00,
349 FD_STATE_STATUS = 0x01,
350 FD_STATE_DATA = 0x02,
351 FD_STATE_STATE = 0x03,
352 FD_STATE_MULTI = 0x10,
353 FD_STATE_SEEK = 0x20,
baca51fa 354 FD_STATE_FORMAT = 0x40,
8977f3c1
FB		 355};
356
357#define FD_STATE(state) ((state) & FD_STATE_STATE)
baca51fa
FB		 358#define FD_SET_STATE(state, new_state) \
359do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
8977f3c1
FB		 360#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
361#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
baca51fa 362#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
8977f3c1 363
baca51fa
FB		 364struct fdctrl_t {
365 fdctrl_t *fdctrl;
4b19ec0c 366 /* Controller's identification */
8977f3c1
FB		 367 uint8_t version;
368 /* HW */
369 int irq_lvl;
370 int dma_chann;
baca51fa 371 uint32_t io_base;
4b19ec0c 372 /* Controller state */
ed5fd2cc 373 QEMUTimer *result_timer;
8977f3c1
FB		 374 uint8_t state;
375 uint8_t dma_en;
376 uint8_t cur_drv;
377 uint8_t bootsel;
378 /* Command FIFO */
379 uint8_t fifo[FD_SECTOR_LEN];
380 uint32_t data_pos;
381 uint32_t data_len;
382 uint8_t data_state;
383 uint8_t data_dir;
384 uint8_t int_status;
890fa6be 385 uint8_t eot; /* last wanted sector */
8977f3c1
FB		 386 /* States kept only to be returned back */
387 /* Timers state */
388 uint8_t timer0;
389 uint8_t timer1;
390 /* precompensation */
391 uint8_t precomp_trk;
392 uint8_t config;
393 uint8_t lock;
394 /* Power down config (also with status regB access mode */
395 uint8_t pwrd;
396 /* Floppy drives */
397 fdrive_t drives[2];
baca51fa
FB		 398};
399
400static uint32_t fdctrl_read (void *opaque, uint32_t reg)
401{
402 fdctrl_t *fdctrl = opaque;
403 uint32_t retval;
404
a541f297
FB		 405 switch (reg & 0x07) {
406 case 0x01:
baca51fa 407 retval = fdctrl_read_statusB(fdctrl);
a541f297
FB		 408 break;
409 case 0x02:
baca51fa 410 retval = fdctrl_read_dor(fdctrl);
a541f297
FB		 411 break;
412 case 0x03:
baca51fa 413 retval = fdctrl_read_tape(fdctrl);
a541f297
FB		 414 break;
415 case 0x04:
baca51fa 416 retval = fdctrl_read_main_status(fdctrl);
a541f297
FB		 417 break;
418 case 0x05:
baca51fa 419 retval = fdctrl_read_data(fdctrl);
a541f297
FB		 420 break;
421 case 0x07:
baca51fa 422 retval = fdctrl_read_dir(fdctrl);
a541f297
FB		 423 break;
424 default:
baca51fa 425 retval = (uint32_t)(-1);
a541f297
FB		 426 break;
427 }
ed5fd2cc 428 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
baca51fa
FB		 429
430 return retval;
431}
432
433static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
434{
435 fdctrl_t *fdctrl = opaque;
436
ed5fd2cc
FB		 437 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
438
a541f297
FB		 439 switch (reg & 0x07) {
440 case 0x02:
baca51fa 441 fdctrl_write_dor(fdctrl, value);
a541f297
FB		 442 break;
443 case 0x03:
baca51fa 444 fdctrl_write_tape(fdctrl, value);
a541f297
FB		 445 break;
446 case 0x04:
baca51fa 447 fdctrl_write_rate(fdctrl, value);
a541f297
FB		 448 break;
449 case 0x05:
baca51fa 450 fdctrl_write_data(fdctrl, value);
a541f297
FB		 451 break;
452 default:
453 break;
454 }
baca51fa
FB		 455}
456
457static void fd_change_cb (void *opaque)
458{
459 fdrive_t *drv = opaque;
8977f3c1 460
baca51fa 461 FLOPPY_DPRINTF("disk change\n");
baca51fa
FB		 462 fd_revalidate(drv);
463#if 0
464 fd_recalibrate(drv);
465 fdctrl_reset_fifo(drv->fdctrl);
466 fdctrl_raise_irq(drv->fdctrl, 0x20);
467#endif
468}
8977f3c1 469
baca51fa
FB		 470fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
471 uint32_t io_base,
472 BlockDriverState **fds)
8977f3c1 473{
baca51fa 474 fdctrl_t *fdctrl;
8977f3c1
FB		 475// int io_mem;
476 int i;
477
4b19ec0c 478 FLOPPY_DPRINTF("init controller\n");
baca51fa
FB		 479 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
480 if (!fdctrl)
481 return NULL;
ed5fd2cc
FB		 482 fdctrl->result_timer = qemu_new_timer(vm_clock,
483 fdctrl_result_timer, fdctrl);
484
4b19ec0c 485 fdctrl->version = 0x90; /* Intel 82078 controller */
baca51fa
FB		 486 fdctrl->irq_lvl = irq_lvl;
487 fdctrl->dma_chann = dma_chann;
488 fdctrl->io_base = io_base;
a541f297 489 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
baca51fa
FB		 490 if (fdctrl->dma_chann != -1) {
491 fdctrl->dma_en = 1;
492 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
8977f3c1 493 } else {
baca51fa 494 fdctrl->dma_en = 0;
8977f3c1 495 }
baca51fa
FB		 496 for (i = 0; i < 2; i++) {
497 fd_init(&fdctrl->drives[i], fds[i]);
498 if (fds[i]) {
499 bdrv_set_change_cb(fds[i],
500 &fd_change_cb, &fdctrl->drives[i]);
501 }
caed8802 502 }
baca51fa
FB		 503 fdctrl_reset(fdctrl, 0);
504 fdctrl->state = FD_CTRL_ACTIVE;
8977f3c1
FB		 505 if (mem_mapped) {
506 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
507#if 0
508 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
509 cpu_register_physical_memory(base, 0x08, io_mem);
510#endif
511 } else {
baca51fa
FB		 512 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
513 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
514 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
515 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
8977f3c1 516 }
a541f297 517 for (i = 0; i < 2; i++) {
baca51fa 518 fd_revalidate(&fdctrl->drives[i]);
8977f3c1 519 }
a541f297 520
baca51fa 521 return fdctrl;
caed8802 522}
8977f3c1 523
baca51fa
FB		 524/* XXX: may change if moved to bdrv */
525int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
caed8802 526{
baca51fa 527 return fdctrl->drives[drive_num].drive;
8977f3c1
FB		 528}
529
530/* Change IRQ state */
baca51fa 531static void fdctrl_reset_irq (fdctrl_t *fdctrl)
8977f3c1 532{
ed5fd2cc
FB		 533 FLOPPY_DPRINTF("Reset interrupt\n");
534 pic_set_irq(fdctrl->irq_lvl, 0);
535 fdctrl->state &= ~FD_CTRL_INTR;
8977f3c1
FB		 536}
537
baca51fa 538static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
8977f3c1 539{
baca51fa
FB		 540 if (~(fdctrl->state & FD_CTRL_INTR)) {
541 pic_set_irq(fdctrl->irq_lvl, 1);
542 fdctrl->state |= FD_CTRL_INTR;
8977f3c1
FB		 543 }
544 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
baca51fa 545 fdctrl->int_status = status;
8977f3c1
FB		 546}
547
4b19ec0c 548/* Reset controller */
baca51fa 549static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
8977f3c1
FB		 550{
551 int i;
552
4b19ec0c 553 FLOPPY_DPRINTF("reset controller\n");
baca51fa 554 fdctrl_reset_irq(fdctrl);
4b19ec0c 555 /* Initialise controller */
baca51fa 556 fdctrl->cur_drv = 0;
8977f3c1 557 /* FIFO state */
baca51fa
FB		 558 fdctrl->data_pos = 0;
559 fdctrl->data_len = 0;
560 fdctrl->data_state = FD_STATE_CMD;
561 fdctrl->data_dir = FD_DIR_WRITE;
8977f3c1 562 for (i = 0; i < MAX_FD; i++)
baca51fa
FB		 563 fd_reset(&fdctrl->drives[i]);
564 fdctrl_reset_fifo(fdctrl);
8977f3c1 565 if (do_irq)
ed5fd2cc 566 fdctrl_raise_irq(fdctrl, 0xc0);
baca51fa
FB		 567}
568
569static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
570{
571 return &fdctrl->drives[fdctrl->bootsel];
572}
573
574static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
575{
576 return &fdctrl->drives[1 - fdctrl->bootsel];
577}
578
579static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
580{
581 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
8977f3c1
FB		 582}
583
584/* Status B register : 0x01 (read-only) */
baca51fa 585static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
8977f3c1 586{
8977f3c1 587 FLOPPY_DPRINTF("status register: 0x00\n");
8977f3c1
FB		 588 return 0;
589}
590
591/* Digital output register : 0x02 */
baca51fa 592static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
8977f3c1 593{
8977f3c1
FB		 594 uint32_t retval = 0;
595
8977f3c1 596 /* Drive motors state indicators */
baca51fa
FB		 597 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
598 retval |= 1 << 5;
599 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
600 retval |= 1 << 4;
8977f3c1 601 /* DMA enable */
baca51fa 602 retval |= fdctrl->dma_en << 3;
8977f3c1 603 /* Reset indicator */
baca51fa 604 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
8977f3c1 605 /* Selected drive */
baca51fa 606 retval |= fdctrl->cur_drv;
8977f3c1
FB		 607 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
608
609 return retval;
610}
611
baca51fa 612static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
8977f3c1 613{
8977f3c1 614 /* Reset mode */
baca51fa 615 if (fdctrl->state & FD_CTRL_RESET) {
8977f3c1 616 if (!(value & 0x04)) {
4b19ec0c 617 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 618 return;
619 }
620 }
621 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
622 /* Drive motors state indicators */
623 if (value & 0x20)
baca51fa 624 fd_start(drv1(fdctrl));
8977f3c1 625 else
baca51fa 626 fd_stop(drv1(fdctrl));
8977f3c1 627 if (value & 0x10)
baca51fa 628 fd_start(drv0(fdctrl));
8977f3c1 629 else
baca51fa 630 fd_stop(drv0(fdctrl));
8977f3c1
FB		 631 /* DMA enable */
632#if 0
baca51fa
FB		 633 if (fdctrl->dma_chann != -1)
634 fdctrl->dma_en = 1 - ((value >> 3) & 1);
8977f3c1
FB		 635#endif
636 /* Reset */
637 if (!(value & 0x04)) {
baca51fa 638 if (!(fdctrl->state & FD_CTRL_RESET)) {
4b19ec0c 639 FLOPPY_DPRINTF("controller enter RESET state\n");
baca51fa 640 fdctrl->state |= FD_CTRL_RESET;
8977f3c1
FB		 641 }
642 } else {
baca51fa 643 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 644 FLOPPY_DPRINTF("controller out of RESET state\n");
fb6cf1d0 645 fdctrl_reset(fdctrl, 1);
baca51fa 646 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
8977f3c1
FB		 647 }
648 }
649 /* Selected drive */
baca51fa 650 fdctrl->cur_drv = value & 1;
8977f3c1
FB		 651}
652
653/* Tape drive register : 0x03 */
baca51fa 654static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
8977f3c1
FB		 655{
656 uint32_t retval = 0;
657
8977f3c1 658 /* Disk boot selection indicator */
baca51fa 659 retval |= fdctrl->bootsel << 2;
8977f3c1
FB		 660 /* Tape indicators: never allowed */
661 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
662
663 return retval;
664}
665
baca51fa 666static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
8977f3c1 667{
8977f3c1 668 /* Reset mode */
baca51fa 669 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 670 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 671 return;
672 }
673 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
674 /* Disk boot selection indicator */
baca51fa 675 fdctrl->bootsel = (value >> 2) & 1;
8977f3c1
FB		 676 /* Tape indicators: never allow */
677}
678
679/* Main status register : 0x04 (read) */
baca51fa 680static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
8977f3c1
FB		 681{
682 uint32_t retval = 0;
683
baca51fa
FB		 684 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
685 if (!(fdctrl->state & FD_CTRL_BUSY)) {
8977f3c1
FB		 686 /* Data transfer allowed */
687 retval |= 0x80;
688 /* Data transfer direction indicator */
baca51fa 689 if (fdctrl->data_dir == FD_DIR_READ)
8977f3c1
FB		 690 retval |= 0x40;
691 }
692 /* Should handle 0x20 for SPECIFY command */
693 /* Command busy indicator */
baca51fa
FB		 694 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
695 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
8977f3c1
FB		 696 retval |= 0x10;
697 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
698
699 return retval;
700}
701
702/* Data select rate register : 0x04 (write) */
baca51fa 703static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
8977f3c1 704{
8977f3c1 705 /* Reset mode */
baca51fa 706 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 707 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 708 return;
709 }
8977f3c1
FB		 710 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
711 /* Reset: autoclear */
712 if (value & 0x80) {
baca51fa
FB		 713 fdctrl->state |= FD_CTRL_RESET;
714 fdctrl_reset(fdctrl, 1);
715 fdctrl->state &= ~FD_CTRL_RESET;
8977f3c1
FB		 716 }
717 if (value & 0x40) {
baca51fa
FB		 718 fdctrl->state |= FD_CTRL_SLEEP;
719 fdctrl_reset(fdctrl, 1);
8977f3c1
FB		 720 }
721// fdctrl.precomp = (value >> 2) & 0x07;
722}
723
724/* Digital input register : 0x07 (read-only) */
baca51fa 725static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
8977f3c1 726{
8977f3c1
FB		 727 uint32_t retval = 0;
728
baca51fa
FB		 729 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
730 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
8977f3c1
FB		 731 retval |= 0x80;
732 if (retval != 0)
baca51fa
FB		 733 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
734 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
735 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
8977f3c1
FB		 736
737 return retval;
738}
739
740/* FIFO state control */
baca51fa 741static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
8977f3c1 742{
baca51fa
FB		 743 fdctrl->data_dir = FD_DIR_WRITE;
744 fdctrl->data_pos = 0;
745 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
8977f3c1
FB		 746}
747
748/* Set FIFO status for the host to read */
baca51fa 749static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
8977f3c1 750{
baca51fa
FB		 751 fdctrl->data_dir = FD_DIR_READ;
752 fdctrl->data_len = fifo_len;
753 fdctrl->data_pos = 0;
754 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
8977f3c1 755 if (do_irq)
baca51fa 756 fdctrl_raise_irq(fdctrl, 0x00);
8977f3c1
FB		 757}
758
759/* Set an error: unimplemented/unknown command */
baca51fa 760static void fdctrl_unimplemented (fdctrl_t *fdctrl)
8977f3c1
FB		 761{
762#if 0
baca51fa
FB		 763 fdrive_t *cur_drv;
764
765 cur_drv = get_cur_drv(fdctrl);
890fa6be 766 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
baca51fa
FB		 767 fdctrl->fifo[1] = 0x00;
768 fdctrl->fifo[2] = 0x00;
769 fdctrl_set_fifo(fdctrl, 3, 1);
8977f3c1 770#else
baca51fa
FB		 771 // fdctrl_reset_fifo(fdctrl);
772 fdctrl->fifo[0] = 0x80;
773 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 774#endif
775}
776
777/* Callback for transfer end (stop or abort) */
baca51fa
FB		 778static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
779 uint8_t status1, uint8_t status2)
8977f3c1 780{
baca51fa 781 fdrive_t *cur_drv;
8977f3c1 782
baca51fa 783 cur_drv = get_cur_drv(fdctrl);
8977f3c1
FB		 784 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
785 status0, status1, status2,
890fa6be
FB		 786 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
787 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
baca51fa
FB		 788 fdctrl->fifo[1] = status1;
789 fdctrl->fifo[2] = status2;
790 fdctrl->fifo[3] = cur_drv->track;
791 fdctrl->fifo[4] = cur_drv->head;
792 fdctrl->fifo[5] = cur_drv->sect;
793 fdctrl->fifo[6] = FD_SECTOR_SC;
794 fdctrl->data_dir = FD_DIR_READ;
ed5fd2cc 795 if (fdctrl->state & FD_CTRL_BUSY) {
baca51fa 796 DMA_release_DREQ(fdctrl->dma_chann);
ed5fd2cc
FB		 797 fdctrl->state &= ~FD_CTRL_BUSY;
798 }
baca51fa 799 fdctrl_set_fifo(fdctrl, 7, 1);
8977f3c1
FB		 800}
801
802/* Prepare a data transfer (either DMA or FIFO) */
baca51fa 803static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
8977f3c1 804{
baca51fa 805 fdrive_t *cur_drv;
8977f3c1
FB		 806 uint8_t kh, kt, ks;
807 int did_seek;
808
baca51fa
FB		 809 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
810 cur_drv = get_cur_drv(fdctrl);
811 kt = fdctrl->fifo[2];
812 kh = fdctrl->fifo[3];
813 ks = fdctrl->fifo[4];
4b19ec0c 814 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
baca51fa 815 fdctrl->cur_drv, kh, kt, ks,
8977f3c1
FB		 816 _fd_sector(kh, kt, ks, cur_drv->last_sect));
817 did_seek = 0;
baca51fa 818 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
8977f3c1
FB		 819 case 2:
820 /* sect too big */
baca51fa
FB		 821 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
822 fdctrl->fifo[3] = kt;
823 fdctrl->fifo[4] = kh;
824 fdctrl->fifo[5] = ks;
8977f3c1
FB		 825 return;
826 case 3:
827 /* track too big */
baca51fa
FB		 828 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
829 fdctrl->fifo[3] = kt;
830 fdctrl->fifo[4] = kh;
831 fdctrl->fifo[5] = ks;
8977f3c1
FB		 832 return;
833 case 4:
834 /* No seek enabled */
baca51fa
FB		 835 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
836 fdctrl->fifo[3] = kt;
837 fdctrl->fifo[4] = kh;
838 fdctrl->fifo[5] = ks;
8977f3c1
FB		 839 return;
840 case 1:
841 did_seek = 1;
842 break;
843 default:
844 break;
845 }
846 /* Set the FIFO state */
baca51fa
FB		 847 fdctrl->data_dir = direction;
848 fdctrl->data_pos = 0;
849 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
850 if (fdctrl->fifo[0] & 0x80)
851 fdctrl->data_state |= FD_STATE_MULTI;
852 else
853 fdctrl->data_state &= ~FD_STATE_MULTI;
8977f3c1 854 if (did_seek)
baca51fa
FB		 855 fdctrl->data_state |= FD_STATE_SEEK;
856 else
857 fdctrl->data_state &= ~FD_STATE_SEEK;
858 if (fdctrl->fifo[5] == 00) {
859 fdctrl->data_len = fdctrl->fifo[8];
860 } else {
861 int tmp;
862 fdctrl->data_len = 128 << fdctrl->fifo[5];
863 tmp = (cur_drv->last_sect - ks + 1);
864 if (fdctrl->fifo[0] & 0x80)
865 tmp += cur_drv->last_sect;
866 fdctrl->data_len *= tmp;
867 }
890fa6be 868 fdctrl->eot = fdctrl->fifo[6];
baca51fa 869 if (fdctrl->dma_en) {
8977f3c1
FB		 870 int dma_mode;
871 /* DMA transfer are enabled. Check if DMA channel is well programmed */
baca51fa 872 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
8977f3c1 873 dma_mode = (dma_mode >> 2) & 3;
baca51fa
FB		 874 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
875 dma_mode, direction,
876 (128 << fdctrl->fifo[5]) *
877 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
8977f3c1
FB		 878 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
879 direction == FD_DIR_SCANH) && dma_mode == 0) ||
880 (direction == FD_DIR_WRITE && dma_mode == 2) ||
881 (direction == FD_DIR_READ && dma_mode == 1)) {
882 /* No access is allowed until DMA transfer has completed */
baca51fa 883 fdctrl->state |= FD_CTRL_BUSY;
4b19ec0c 884 /* Now, we just have to wait for the DMA controller to
8977f3c1
FB		 885 * recall us...
886 */
baca51fa
FB		 887 DMA_hold_DREQ(fdctrl->dma_chann);
888 DMA_schedule(fdctrl->dma_chann);
8977f3c1 889 return;
baca51fa
FB		 890 } else {
891 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
8977f3c1
FB		 892 }
893 }
894 FLOPPY_DPRINTF("start non-DMA transfer\n");
895 /* IO based transfer: calculate len */
baca51fa 896 fdctrl_raise_irq(fdctrl, 0x00);
8977f3c1
FB		 897
898 return;
899}
900
901/* Prepare a transfer of deleted data */
baca51fa 902static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
8977f3c1
FB		 903{
904 /* We don't handle deleted data,
905 * so we don't return *ANYTHING*
906 */
baca51fa 907 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
8977f3c1
FB		 908}
909
910/* handlers for DMA transfers */
f9e92e97 911static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
8977f3c1 912{
baca51fa
FB		 913 fdctrl_t *fdctrl;
914 fdrive_t *cur_drv;
915 int len, start_pos, rel_pos;
8977f3c1
FB		 916 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
917
baca51fa 918 fdctrl = opaque;
baca51fa 919 if (!(fdctrl->state & FD_CTRL_BUSY)) {
8977f3c1
FB		 920 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
921 return 0;
922 }
baca51fa
FB		 923 cur_drv = get_cur_drv(fdctrl);
924 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
925 fdctrl->data_dir == FD_DIR_SCANH)
8977f3c1 926 status2 = 0x04;
baca51fa
FB		 927 if (size > fdctrl->data_len)
928 size = fdctrl->data_len;
890fa6be 929 if (cur_drv->bs == NULL) {
baca51fa
FB		 930 if (fdctrl->data_dir == FD_DIR_WRITE)
931 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
932 else
933 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
934 len = 0;
890fa6be
FB		 935 goto transfer_error;
936 }
baca51fa
FB		 937 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
938 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < size;) {
939 len = size - fdctrl->data_pos;
940 if (len + rel_pos > FD_SECTOR_LEN)
941 len = FD_SECTOR_LEN - rel_pos;
942 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
943 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
944 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
945 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
946 fd_sector(cur_drv) * 512, addr);
947 if (fdctrl->data_dir != FD_DIR_WRITE ||
948 len < FD_SECTOR_LEN || rel_pos != 0) {
949 /* READ & SCAN commands and realign to a sector for WRITE */
950 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
951 fdctrl->fifo, 1) < 0) {
8977f3c1
FB		 952 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
953 fd_sector(cur_drv));
954 /* Sure, image size is too small... */
baca51fa 955 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
8977f3c1 956 }
890fa6be 957 }
baca51fa
FB		 958 switch (fdctrl->data_dir) {
959 case FD_DIR_READ:
960 /* READ commands */
961 cpu_physical_memory_write(addr + fdctrl->data_pos,
962 fdctrl->fifo + rel_pos, len);
963 break;
964 case FD_DIR_WRITE:
965 /* WRITE commands */
966 cpu_physical_memory_read(addr + fdctrl->data_pos,
967 fdctrl->fifo + rel_pos, len);
968 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
969 fdctrl->fifo, 1) < 0) {
970 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
971 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
972 goto transfer_error;
890fa6be 973 }
baca51fa
FB		 974 break;
975 default:
976 /* SCAN commands */
977 {
978 uint8_t tmpbuf[FD_SECTOR_LEN];
979 int ret;
980 cpu_physical_memory_read(addr + fdctrl->data_pos,
981 tmpbuf, len);
982 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
8977f3c1
FB		 983 if (ret == 0) {
984 status2 = 0x08;
985 goto end_transfer;
986 }
baca51fa
FB		 987 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
988 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
8977f3c1
FB		 989 status2 = 0x00;
990 goto end_transfer;
991 }
992 }
baca51fa 993 break;
8977f3c1 994 }
baca51fa
FB		 995 fdctrl->data_pos += len;
996 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
997 if (rel_pos == 0) {
8977f3c1 998 /* Seek to next sector */
baca51fa
FB		 999 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1000 cur_drv->head, cur_drv->track, cur_drv->sect,
1001 fd_sector(cur_drv),
1002 fdctrl->data_pos - size);
890fa6be
FB		 1003 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1004 error in fact */
1005 if (cur_drv->sect >= cur_drv->last_sect ||
1006 cur_drv->sect == fdctrl->eot) {
baca51fa
FB		 1007 cur_drv->sect = 1;
1008 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1009 if (cur_drv->head == 0 &&
1010 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
890fa6be
FB		 1011 cur_drv->head = 1;
1012 } else {
1013 cur_drv->head = 0;
baca51fa
FB		 1014 cur_drv->track++;
1015 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1016 break;
890fa6be
FB		 1017 }
1018 } else {
1019 cur_drv->track++;
1020 break;
8977f3c1 1021 }
baca51fa
FB		 1022 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1023 cur_drv->head, cur_drv->track,
1024 cur_drv->sect, fd_sector(cur_drv));
890fa6be
FB		 1025 } else {
1026 cur_drv->sect++;
8977f3c1
FB		 1027 }
1028 }
1029 }
1030end_transfer:
baca51fa
FB		 1031 len = fdctrl->data_pos - start_pos;
1032 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1033 fdctrl->data_pos, len, fdctrl->data_len);
1034 if (fdctrl->data_dir == FD_DIR_SCANE ||
1035 fdctrl->data_dir == FD_DIR_SCANL ||
1036 fdctrl->data_dir == FD_DIR_SCANH)
8977f3c1 1037 status2 = 0x08;
baca51fa 1038 if (FD_DID_SEEK(fdctrl->data_state))
8977f3c1 1039 status0 |= 0x20;
baca51fa
FB		 1040 fdctrl->data_len -= len;
1041 // if (fdctrl->data_len == 0)
890fa6be 1042 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
8977f3c1
FB		 1043transfer_error:
1044
baca51fa 1045 return len;
8977f3c1
FB		 1046}
1047
8977f3c1 1048/* Data register : 0x05 */
baca51fa 1049static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
8977f3c1 1050{
baca51fa 1051 fdrive_t *cur_drv;
8977f3c1
FB		 1052 uint32_t retval = 0;
1053 int pos, len;
1054
baca51fa
FB		 1055 cur_drv = get_cur_drv(fdctrl);
1056 fdctrl->state &= ~FD_CTRL_SLEEP;
1057 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
8977f3c1
FB		 1058 FLOPPY_ERROR("can't read data in CMD state\n");
1059 return 0;
1060 }
baca51fa
FB		 1061 pos = fdctrl->data_pos;
1062 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
8977f3c1
FB		 1063 pos %= FD_SECTOR_LEN;
1064 if (pos == 0) {
baca51fa 1065 len = fdctrl->data_len - fdctrl->data_pos;
8977f3c1
FB		 1066 if (len > FD_SECTOR_LEN)
1067 len = FD_SECTOR_LEN;
1068 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
baca51fa 1069 fdctrl->fifo, len);
8977f3c1
FB		 1070 }
1071 }
baca51fa
FB		 1072 retval = fdctrl->fifo[pos];
1073 if (++fdctrl->data_pos == fdctrl->data_len) {
1074 fdctrl->data_pos = 0;
890fa6be 1075 /* Switch from transfer mode to status mode
8977f3c1
FB		 1076 * then from status mode to command mode
1077 */
ed5fd2cc 1078 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
baca51fa 1079 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
ed5fd2cc 1080 } else {
baca51fa 1081 fdctrl_reset_fifo(fdctrl);
ed5fd2cc
FB		 1082 fdctrl_reset_irq(fdctrl);
1083 }
8977f3c1
FB		 1084 }
1085 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1086
1087 return retval;
1088}
1089
baca51fa 1090static void fdctrl_format_sector (fdctrl_t *fdctrl)
8977f3c1 1091{
baca51fa
FB		 1092 fdrive_t *cur_drv;
1093 uint8_t kh, kt, ks;
1094 int did_seek;
8977f3c1 1095
baca51fa
FB		 1096 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1097 cur_drv = get_cur_drv(fdctrl);
1098 kt = fdctrl->fifo[6];
1099 kh = fdctrl->fifo[7];
1100 ks = fdctrl->fifo[8];
1101 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1102 fdctrl->cur_drv, kh, kt, ks,
1103 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1104 did_seek = 0;
1105 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1106 case 2:
1107 /* sect too big */
1108 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1109 fdctrl->fifo[3] = kt;
1110 fdctrl->fifo[4] = kh;
1111 fdctrl->fifo[5] = ks;
1112 return;
1113 case 3:
1114 /* track too big */
1115 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1116 fdctrl->fifo[3] = kt;
1117 fdctrl->fifo[4] = kh;
1118 fdctrl->fifo[5] = ks;
1119 return;
1120 case 4:
1121 /* No seek enabled */
1122 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1123 fdctrl->fifo[3] = kt;
1124 fdctrl->fifo[4] = kh;
1125 fdctrl->fifo[5] = ks;
1126 return;
1127 case 1:
1128 did_seek = 1;
1129 fdctrl->data_state |= FD_STATE_SEEK;
1130 break;
1131 default:
1132 break;
1133 }
1134 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1135 if (cur_drv->bs == NULL ||
1136 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1137 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1138 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1139 } else {
1140 if (cur_drv->sect == cur_drv->last_sect) {
1141 fdctrl->data_state &= ~FD_STATE_FORMAT;
1142 /* Last sector done */
1143 if (FD_DID_SEEK(fdctrl->data_state))
1144 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1145 else
1146 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1147 } else {
1148 /* More to do */
1149 fdctrl->data_pos = 0;
1150 fdctrl->data_len = 4;
1151 }
1152 }
1153}
1154
1155static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1156{
1157 fdrive_t *cur_drv;
1158
baca51fa 1159 cur_drv = get_cur_drv(fdctrl);
8977f3c1 1160 /* Reset mode */
baca51fa 1161 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 1162 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 1163 return;
1164 }
baca51fa
FB		 1165 fdctrl->state &= ~FD_CTRL_SLEEP;
1166 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
8977f3c1
FB		 1167 FLOPPY_ERROR("can't write data in status mode\n");
1168 return;
1169 }
1170 /* Is it write command time ? */
baca51fa 1171 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
8977f3c1 1172 /* FIFO data write */
baca51fa
FB		 1173 fdctrl->fifo[fdctrl->data_pos++] = value;
1174 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1175 fdctrl->data_pos == fdctrl->data_len) {
8977f3c1 1176 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
baca51fa 1177 fdctrl->fifo, FD_SECTOR_LEN);
8977f3c1 1178 }
890fa6be 1179 /* Switch from transfer mode to status mode
8977f3c1
FB		 1180 * then from status mode to command mode
1181 */
baca51fa
FB		 1182 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1183 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
8977f3c1
FB		 1184 return;
1185 }
baca51fa 1186 if (fdctrl->data_pos == 0) {
8977f3c1
FB		 1187 /* Command */
1188 switch (value & 0x5F) {
1189 case 0x46:
1190 /* READ variants */
1191 FLOPPY_DPRINTF("READ command\n");
1192 /* 8 parameters cmd */
baca51fa 1193 fdctrl->data_len = 9;
8977f3c1
FB		 1194 goto enqueue;
1195 case 0x4C:
1196 /* READ_DELETED variants */
1197 FLOPPY_DPRINTF("READ_DELETED command\n");
1198 /* 8 parameters cmd */
baca51fa 1199 fdctrl->data_len = 9;
8977f3c1
FB		 1200 goto enqueue;
1201 case 0x50:
1202 /* SCAN_EQUAL variants */
1203 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1204 /* 8 parameters cmd */
baca51fa 1205 fdctrl->data_len = 9;
8977f3c1
FB		 1206 goto enqueue;
1207 case 0x56:
1208 /* VERIFY variants */
1209 FLOPPY_DPRINTF("VERIFY command\n");
1210 /* 8 parameters cmd */
baca51fa 1211 fdctrl->data_len = 9;
8977f3c1
FB		 1212 goto enqueue;
1213 case 0x59:
1214 /* SCAN_LOW_OR_EQUAL variants */
1215 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1216 /* 8 parameters cmd */
baca51fa 1217 fdctrl->data_len = 9;
8977f3c1
FB		 1218 goto enqueue;
1219 case 0x5D:
1220 /* SCAN_HIGH_OR_EQUAL variants */
1221 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1222 /* 8 parameters cmd */
baca51fa 1223 fdctrl->data_len = 9;
8977f3c1
FB		 1224 goto enqueue;
1225 default:
1226 break;
1227 }
1228 switch (value & 0x7F) {
1229 case 0x45:
1230 /* WRITE variants */
1231 FLOPPY_DPRINTF("WRITE command\n");
1232 /* 8 parameters cmd */
baca51fa 1233 fdctrl->data_len = 9;
8977f3c1
FB		 1234 goto enqueue;
1235 case 0x49:
1236 /* WRITE_DELETED variants */
1237 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1238 /* 8 parameters cmd */
baca51fa 1239 fdctrl->data_len = 9;
8977f3c1
FB		 1240 goto enqueue;
1241 default:
1242 break;
1243 }
1244 switch (value) {
1245 case 0x03:
1246 /* SPECIFY */
1247 FLOPPY_DPRINTF("SPECIFY command\n");
1248 /* 1 parameter cmd */
baca51fa 1249 fdctrl->data_len = 3;
8977f3c1
FB		 1250 goto enqueue;
1251 case 0x04:
1252 /* SENSE_DRIVE_STATUS */
1253 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1254 /* 1 parameter cmd */
baca51fa 1255 fdctrl->data_len = 2;
8977f3c1
FB		 1256 goto enqueue;
1257 case 0x07:
1258 /* RECALIBRATE */
1259 FLOPPY_DPRINTF("RECALIBRATE command\n");
1260 /* 1 parameter cmd */
baca51fa 1261 fdctrl->data_len = 2;
8977f3c1
FB		 1262 goto enqueue;
1263 case 0x08:
1264 /* SENSE_INTERRUPT_STATUS */
1265 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
baca51fa 1266 fdctrl->int_status);
8977f3c1 1267 /* No parameters cmd: returns status if no interrupt */
953569d2 1268#if 0
baca51fa
FB		 1269 fdctrl->fifo[0] =
1270 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
953569d2
FB		 1271#else
1272 /* XXX: int_status handling is broken for read/write
1273 commands, so we do this hack. It should be suppressed
1274 ASAP */
1275 fdctrl->fifo[0] =
1276 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1277#endif
baca51fa
FB		 1278 fdctrl->fifo[1] = cur_drv->track;
1279 fdctrl_set_fifo(fdctrl, 2, 0);
1280 fdctrl_reset_irq(fdctrl);
1281 fdctrl->int_status = 0xC0;
8977f3c1
FB		 1282 return;
1283 case 0x0E:
1284 /* DUMPREG */
1285 FLOPPY_DPRINTF("DUMPREG command\n");
1286 /* Drives position */
baca51fa
FB		 1287 fdctrl->fifo[0] = drv0(fdctrl)->track;
1288 fdctrl->fifo[1] = drv1(fdctrl)->track;
1289 fdctrl->fifo[2] = 0;
1290 fdctrl->fifo[3] = 0;
8977f3c1 1291 /* timers */
baca51fa
FB		 1292 fdctrl->fifo[4] = fdctrl->timer0;
1293 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1294 fdctrl->fifo[6] = cur_drv->last_sect;
1295 fdctrl->fifo[7] = (fdctrl->lock << 7) |
8977f3c1 1296 (cur_drv->perpendicular << 2);
baca51fa
FB		 1297 fdctrl->fifo[8] = fdctrl->config;
1298 fdctrl->fifo[9] = fdctrl->precomp_trk;
1299 fdctrl_set_fifo(fdctrl, 10, 0);
8977f3c1
FB		 1300 return;
1301 case 0x0F:
1302 /* SEEK */
1303 FLOPPY_DPRINTF("SEEK command\n");
1304 /* 2 parameters cmd */
baca51fa 1305 fdctrl->data_len = 3;
8977f3c1
FB		 1306 goto enqueue;
1307 case 0x10:
1308 /* VERSION */
1309 FLOPPY_DPRINTF("VERSION command\n");
1310 /* No parameters cmd */
4b19ec0c 1311 /* Controller's version */
baca51fa
FB		 1312 fdctrl->fifo[0] = fdctrl->version;
1313 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1314 return;
1315 case 0x12:
1316 /* PERPENDICULAR_MODE */
1317 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1318 /* 1 parameter cmd */
baca51fa 1319 fdctrl->data_len = 2;
8977f3c1
FB		 1320 goto enqueue;
1321 case 0x13:
1322 /* CONFIGURE */
1323 FLOPPY_DPRINTF("CONFIGURE command\n");
1324 /* 3 parameters cmd */
baca51fa 1325 fdctrl->data_len = 4;
8977f3c1
FB		 1326 goto enqueue;
1327 case 0x14:
1328 /* UNLOCK */
1329 FLOPPY_DPRINTF("UNLOCK command\n");
1330 /* No parameters cmd */
baca51fa
FB		 1331 fdctrl->lock = 0;
1332 fdctrl->fifo[0] = 0;
1333 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 1334 return;
1335 case 0x17:
1336 /* POWERDOWN_MODE */
1337 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1338 /* 2 parameters cmd */
baca51fa 1339 fdctrl->data_len = 3;
8977f3c1
FB		 1340 goto enqueue;
1341 case 0x18:
1342 /* PART_ID */
1343 FLOPPY_DPRINTF("PART_ID command\n");
1344 /* No parameters cmd */
baca51fa
FB		 1345 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1346 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 1347 return;
1348 case 0x2C:
1349 /* SAVE */
1350 FLOPPY_DPRINTF("SAVE command\n");
1351 /* No parameters cmd */
baca51fa
FB		 1352 fdctrl->fifo[0] = 0;
1353 fdctrl->fifo[1] = 0;
8977f3c1 1354 /* Drives position */
baca51fa
FB		 1355 fdctrl->fifo[2] = drv0(fdctrl)->track;
1356 fdctrl->fifo[3] = drv1(fdctrl)->track;
1357 fdctrl->fifo[4] = 0;
1358 fdctrl->fifo[5] = 0;
8977f3c1 1359 /* timers */
baca51fa
FB		 1360 fdctrl->fifo[6] = fdctrl->timer0;
1361 fdctrl->fifo[7] = fdctrl->timer1;
1362 fdctrl->fifo[8] = cur_drv->last_sect;
1363 fdctrl->fifo[9] = (fdctrl->lock << 7) |
8977f3c1 1364 (cur_drv->perpendicular << 2);
baca51fa
FB		 1365 fdctrl->fifo[10] = fdctrl->config;
1366 fdctrl->fifo[11] = fdctrl->precomp_trk;
1367 fdctrl->fifo[12] = fdctrl->pwrd;
1368 fdctrl->fifo[13] = 0;
1369 fdctrl->fifo[14] = 0;
1370 fdctrl_set_fifo(fdctrl, 15, 1);
8977f3c1
FB		 1371 return;
1372 case 0x33:
1373 /* OPTION */
1374 FLOPPY_DPRINTF("OPTION command\n");
1375 /* 1 parameter cmd */
baca51fa 1376 fdctrl->data_len = 2;
8977f3c1
FB		 1377 goto enqueue;
1378 case 0x42:
1379 /* READ_TRACK */
1380 FLOPPY_DPRINTF("READ_TRACK command\n");
1381 /* 8 parameters cmd */
baca51fa 1382 fdctrl->data_len = 9;
8977f3c1
FB		 1383 goto enqueue;
1384 case 0x4A:
1385 /* READ_ID */
1386 FLOPPY_DPRINTF("READ_ID command\n");
1387 /* 1 parameter cmd */
baca51fa 1388 fdctrl->data_len = 2;
8977f3c1
FB		 1389 goto enqueue;
1390 case 0x4C:
1391 /* RESTORE */
1392 FLOPPY_DPRINTF("RESTORE command\n");
1393 /* 17 parameters cmd */
baca51fa 1394 fdctrl->data_len = 18;
8977f3c1
FB		 1395 goto enqueue;
1396 case 0x4D:
1397 /* FORMAT_TRACK */
1398 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1399 /* 5 parameters cmd */
baca51fa 1400 fdctrl->data_len = 6;
8977f3c1
FB		 1401 goto enqueue;
1402 case 0x8E:
1403 /* DRIVE_SPECIFICATION_COMMAND */
1404 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1405 /* 5 parameters cmd */
baca51fa 1406 fdctrl->data_len = 6;
8977f3c1
FB		 1407 goto enqueue;
1408 case 0x8F:
1409 /* RELATIVE_SEEK_OUT */
1410 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1411 /* 2 parameters cmd */
baca51fa 1412 fdctrl->data_len = 3;
8977f3c1
FB		 1413 goto enqueue;
1414 case 0x94:
1415 /* LOCK */
1416 FLOPPY_DPRINTF("LOCK command\n");
1417 /* No parameters cmd */
baca51fa
FB		 1418 fdctrl->lock = 1;
1419 fdctrl->fifo[0] = 0x10;
1420 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1421 return;
1422 case 0xCD:
1423 /* FORMAT_AND_WRITE */
1424 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1425 /* 10 parameters cmd */
baca51fa 1426 fdctrl->data_len = 11;
8977f3c1
FB		 1427 goto enqueue;
1428 case 0xCF:
1429 /* RELATIVE_SEEK_IN */
1430 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1431 /* 2 parameters cmd */
baca51fa 1432 fdctrl->data_len = 3;
8977f3c1
FB		 1433 goto enqueue;
1434 default:
1435 /* Unknown command */
1436 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
baca51fa 1437 fdctrl_unimplemented(fdctrl);
8977f3c1
FB		 1438 return;
1439 }
1440 }
1441enqueue:
baca51fa
FB		 1442 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1443 fdctrl->fifo[fdctrl->data_pos] = value;
1444 if (++fdctrl->data_pos == fdctrl->data_len) {
8977f3c1
FB		 1445 /* We now have all parameters
1446 * and will be able to treat the command
1447 */
baca51fa
FB		 1448 if (fdctrl->data_state & FD_STATE_FORMAT) {
1449 fdctrl_format_sector(fdctrl);
1450 return;
1451 }
1452 switch (fdctrl->fifo[0] & 0x1F) {
8977f3c1
FB		 1453 case 0x06:
1454 {
1455 /* READ variants */
1456 FLOPPY_DPRINTF("treat READ command\n");
baca51fa 1457 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
8977f3c1
FB		 1458 return;
1459 }
1460 case 0x0C:
1461 /* READ_DELETED variants */
1462// FLOPPY_DPRINTF("treat READ_DELETED command\n");
1463 FLOPPY_ERROR("treat READ_DELETED command\n");
baca51fa 1464 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
8977f3c1
FB		 1465 return;
1466 case 0x16:
1467 /* VERIFY variants */
1468// FLOPPY_DPRINTF("treat VERIFY command\n");
1469 FLOPPY_ERROR("treat VERIFY command\n");
baca51fa 1470 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
8977f3c1
FB		 1471 return;
1472 case 0x10:
1473 /* SCAN_EQUAL variants */
1474// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1475 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
baca51fa 1476 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
8977f3c1
FB		 1477 return;
1478 case 0x19:
1479 /* SCAN_LOW_OR_EQUAL variants */
1480// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1481 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
baca51fa 1482 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
8977f3c1
FB		 1483 return;
1484 case 0x1D:
1485 /* SCAN_HIGH_OR_EQUAL variants */
1486// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1487 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
baca51fa 1488 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
8977f3c1
FB		 1489 return;
1490 default:
1491 break;
1492 }
baca51fa 1493 switch (fdctrl->fifo[0] & 0x3F) {
8977f3c1
FB		 1494 case 0x05:
1495 /* WRITE variants */
baca51fa
FB		 1496 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1497 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
8977f3c1
FB		 1498 return;
1499 case 0x09:
1500 /* WRITE_DELETED variants */
1501// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1502 FLOPPY_ERROR("treat WRITE_DELETED command\n");
baca51fa 1503 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
8977f3c1
FB		 1504 return;
1505 default:
1506 break;
1507 }
baca51fa 1508 switch (fdctrl->fifo[0]) {
8977f3c1
FB		 1509 case 0x03:
1510 /* SPECIFY */
1511 FLOPPY_DPRINTF("treat SPECIFY command\n");
baca51fa 1512 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
e309de25 1513 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
baca51fa 1514 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
8977f3c1 1515 /* No result back */
baca51fa 1516 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1517 break;
1518 case 0x04:
1519 /* SENSE_DRIVE_STATUS */
1520 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
baca51fa
FB		 1521 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1522 cur_drv = get_cur_drv(fdctrl);
1523 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
8977f3c1 1524 /* 1 Byte status back */
baca51fa 1525 fdctrl->fifo[0] = (cur_drv->ro << 6) |
8977f3c1 1526 (cur_drv->track == 0 ? 0x10 : 0x00) |
890fa6be
FB		 1527 (cur_drv->head << 2) |
1528 fdctrl->cur_drv |
1529 0x28;
baca51fa 1530 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 1531 break;
1532 case 0x07:
1533 /* RECALIBRATE */
1534 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
baca51fa
FB		 1535 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1536 cur_drv = get_cur_drv(fdctrl);
8977f3c1 1537 fd_recalibrate(cur_drv);
baca51fa 1538 fdctrl_reset_fifo(fdctrl);
8977f3c1 1539 /* Raise Interrupt */
baca51fa 1540 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1541 break;
1542 case 0x0F:
1543 /* SEEK */
1544 FLOPPY_DPRINTF("treat SEEK command\n");
baca51fa
FB		 1545 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1546 cur_drv = get_cur_drv(fdctrl);
1547 fd_start(cur_drv);
1548 if (fdctrl->fifo[2] <= cur_drv->track)
8977f3c1
FB		 1549 cur_drv->dir = 1;
1550 else
1551 cur_drv->dir = 0;
baca51fa
FB		 1552 fdctrl_reset_fifo(fdctrl);
1553 if (fdctrl->fifo[2] > cur_drv->max_track) {
1554 fdctrl_raise_irq(fdctrl, 0x60);
8977f3c1 1555 } else {
baca51fa 1556 cur_drv->track = fdctrl->fifo[2];
8977f3c1 1557 /* Raise Interrupt */
baca51fa 1558 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1559 }
1560 break;
1561 case 0x12:
1562 /* PERPENDICULAR_MODE */
1563 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
baca51fa
FB		 1564 if (fdctrl->fifo[1] & 0x80)
1565 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
8977f3c1 1566 /* No result back */
baca51fa 1567 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1568 break;
1569 case 0x13:
1570 /* CONFIGURE */
1571 FLOPPY_DPRINTF("treat CONFIGURE command\n");
baca51fa
FB		 1572 fdctrl->config = fdctrl->fifo[2];
1573 fdctrl->precomp_trk = fdctrl->fifo[3];
8977f3c1 1574 /* No result back */
baca51fa 1575 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1576 break;
1577 case 0x17:
1578 /* POWERDOWN_MODE */
1579 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
baca51fa
FB		 1580 fdctrl->pwrd = fdctrl->fifo[1];
1581 fdctrl->fifo[0] = fdctrl->fifo[1];
1582 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1583 break;
1584 case 0x33:
1585 /* OPTION */
1586 FLOPPY_DPRINTF("treat OPTION command\n");
1587 /* No result back */
baca51fa 1588 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1589 break;
1590 case 0x42:
1591 /* READ_TRACK */
1592// FLOPPY_DPRINTF("treat READ_TRACK command\n");
1593 FLOPPY_ERROR("treat READ_TRACK command\n");
baca51fa 1594 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
8977f3c1
FB		 1595 break;
1596 case 0x4A:
1597 /* READ_ID */
baca51fa 1598 FLOPPY_DPRINTF("treat READ_ID command\n");
ed5fd2cc 1599 /* XXX: should set main status register to busy */
890fa6be 1600 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
ed5fd2cc
FB		 1601 qemu_mod_timer(fdctrl->result_timer,
1602 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
8977f3c1
FB		 1603 break;
1604 case 0x4C:
1605 /* RESTORE */
1606 FLOPPY_DPRINTF("treat RESTORE command\n");
1607 /* Drives position */
baca51fa
FB		 1608 drv0(fdctrl)->track = fdctrl->fifo[3];
1609 drv1(fdctrl)->track = fdctrl->fifo[4];
8977f3c1 1610 /* timers */
baca51fa
FB		 1611 fdctrl->timer0 = fdctrl->fifo[7];
1612 fdctrl->timer1 = fdctrl->fifo[8];
1613 cur_drv->last_sect = fdctrl->fifo[9];
1614 fdctrl->lock = fdctrl->fifo[10] >> 7;
1615 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1616 fdctrl->config = fdctrl->fifo[11];
1617 fdctrl->precomp_trk = fdctrl->fifo[12];
1618 fdctrl->pwrd = fdctrl->fifo[13];
1619 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1620 break;
1621 case 0x4D:
1622 /* FORMAT_TRACK */
baca51fa
FB		 1623 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1624 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1625 cur_drv = get_cur_drv(fdctrl);
1626 fdctrl->data_state |= FD_STATE_FORMAT;
1627 if (fdctrl->fifo[0] & 0x80)
1628 fdctrl->data_state |= FD_STATE_MULTI;
1629 else
1630 fdctrl->data_state &= ~FD_STATE_MULTI;
1631 fdctrl->data_state &= ~FD_STATE_SEEK;
1632 cur_drv->bps =
1633 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1634#if 0
1635 cur_drv->last_sect =
1636 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1637 fdctrl->fifo[3] / 2;
1638#else
1639 cur_drv->last_sect = fdctrl->fifo[3];
1640#endif
1641 /* Bochs BIOS is buggy and don't send format informations
1642 * for each sector. So, pretend all's done right now...
1643 */
1644 fdctrl->data_state &= ~FD_STATE_FORMAT;
1645 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
8977f3c1
FB		 1646 break;
1647 case 0x8E:
1648 /* DRIVE_SPECIFICATION_COMMAND */
1649 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
baca51fa 1650 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
8977f3c1 1651 /* Command parameters done */
baca51fa
FB		 1652 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1653 fdctrl->fifo[0] = fdctrl->fifo[1];
1654 fdctrl->fifo[2] = 0;
1655 fdctrl->fifo[3] = 0;
1656 fdctrl_set_fifo(fdctrl, 4, 1);
8977f3c1 1657 } else {
baca51fa 1658 fdctrl_reset_fifo(fdctrl);
8977f3c1 1659 }
baca51fa 1660 } else if (fdctrl->data_len > 7) {
8977f3c1 1661 /* ERROR */
baca51fa
FB		 1662 fdctrl->fifo[0] = 0x80 |
1663 (cur_drv->head << 2) | fdctrl->cur_drv;
1664 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1665 }
1666 break;
1667 case 0x8F:
1668 /* RELATIVE_SEEK_OUT */
1669 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
baca51fa
FB		 1670 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1671 cur_drv = get_cur_drv(fdctrl);
1672 fd_start(cur_drv);
8977f3c1 1673 cur_drv->dir = 0;
baca51fa
FB		 1674 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1675 cur_drv->track = cur_drv->max_track - 1;
1676 } else {
1677 cur_drv->track += fdctrl->fifo[2];
8977f3c1 1678 }
baca51fa
FB		 1679 fdctrl_reset_fifo(fdctrl);
1680 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1681 break;
1682 case 0xCD:
1683 /* FORMAT_AND_WRITE */
1684// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1685 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
baca51fa 1686 fdctrl_unimplemented(fdctrl);
8977f3c1
FB		 1687 break;
1688 case 0xCF:
1689 /* RELATIVE_SEEK_IN */
1690 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
baca51fa
FB		 1691 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1692 cur_drv = get_cur_drv(fdctrl);
1693 fd_start(cur_drv);
8977f3c1 1694 cur_drv->dir = 1;
baca51fa
FB		 1695 if (fdctrl->fifo[2] > cur_drv->track) {
1696 cur_drv->track = 0;
1697 } else {
1698 cur_drv->track -= fdctrl->fifo[2];
8977f3c1 1699 }
baca51fa
FB		 1700 fdctrl_reset_fifo(fdctrl);
1701 /* Raise Interrupt */
1702 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1703 break;
1704 }
1705 }
1706}
ed5fd2cc
FB		 1707
1708static void fdctrl_result_timer(void *opaque)
1709{
1710 fdctrl_t *fdctrl = opaque;
1711 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1712}
Qemu copy for testing