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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 */
e80cfcfc
FB		 24/*
25 * The controller is used in Sun4m systems in a slightly different
26 * way. There are changes in DOR register and DMA is not available.
27 */
8977f3c1
FB		 28#include "vl.h"
29
30/********************************************************/
31/* debug Floppy devices */
32//#define DEBUG_FLOPPY
33
34#ifdef DEBUG_FLOPPY
35#define FLOPPY_DPRINTF(fmt, args...) \
36do { printf("FLOPPY: " fmt , ##args); } while (0)
37#else
38#define FLOPPY_DPRINTF(fmt, args...)
39#endif
40
41#define FLOPPY_ERROR(fmt, args...) \
42do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
43
44/********************************************************/
45/* Floppy drive emulation */
46
47/* Will always be a fixed parameter for us */
48#define FD_SECTOR_LEN 512
49#define FD_SECTOR_SC 2 /* Sector size code */
50
51/* Floppy disk drive emulation */
52typedef enum fdisk_type_t {
53 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
54 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
55 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
baca51fa
FB		 56 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
57 FDRIVE_DISK_NONE = 0x05, /* No disk */
8977f3c1
FB		 58} fdisk_type_t;
59
60typedef enum fdrive_type_t {
61 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
62 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
63 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
64 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
65} fdrive_type_t;
66
baca51fa
FB		 67typedef enum fdrive_flags_t {
68 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
69 FDRIVE_REVALIDATE = 0x02, /* Revalidated */
70} fdrive_flags_t;
71
72typedef enum fdisk_flags_t {
73 FDISK_DBL_SIDES = 0x01,
74} fdisk_flags_t;
75
8977f3c1
FB		 76typedef struct fdrive_t {
77 BlockDriverState *bs;
78 /* Drive status */
79 fdrive_type_t drive;
baca51fa 80 fdrive_flags_t drflags;
8977f3c1 81 uint8_t perpendicular; /* 2.88 MB access mode */
8977f3c1
FB		 82 /* Position */
83 uint8_t head;
84 uint8_t track;
85 uint8_t sect;
86 /* Last operation status */
87 uint8_t dir; /* Direction */
88 uint8_t rw; /* Read/write */
89 /* Media */
baca51fa 90 fdisk_flags_t flags;
8977f3c1
FB		 91 uint8_t last_sect; /* Nb sector per track */
92 uint8_t max_track; /* Nb of tracks */
baca51fa 93 uint16_t bps; /* Bytes per sector */
8977f3c1
FB		 94 uint8_t ro; /* Is read-only */
95} fdrive_t;
96
e80cfcfc
FB		 97#ifdef TARGET_SPARC
98#define DMA_read_memory(a,b,c,d)
99#define DMA_write_memory(a,b,c,d)
100#define DMA_register_channel(a,b,c)
101#define DMA_hold_DREQ(a)
102#define DMA_release_DREQ(a)
103#define DMA_get_channel_mode(a) (0)
104#define DMA_schedule(a)
105#endif
106
caed8802 107static void fd_init (fdrive_t *drv, BlockDriverState *bs)
8977f3c1
FB		 108{
109 /* Drive */
caed8802 110 drv->bs = bs;
b939777c 111 drv->drive = FDRIVE_DRV_NONE;
baca51fa 112 drv->drflags = 0;
8977f3c1 113 drv->perpendicular = 0;
8977f3c1 114 /* Disk */
baca51fa 115 drv->last_sect = 0;
8977f3c1
FB		 116 drv->max_track = 0;
117}
118
119static int _fd_sector (uint8_t head, uint8_t track,
120 uint8_t sect, uint8_t last_sect)
121{
122 return (((track * 2) + head) * last_sect) + sect - 1;
123}
124
125/* Returns current position, in sectors, for given drive */
126static int fd_sector (fdrive_t *drv)
127{
128 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
129}
130
131static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
132 int enable_seek)
133{
134 uint32_t sector;
baca51fa
FB		 135 int ret;
136
137 if (track > drv->max_track ||
138 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
ed5fd2cc
FB		 139 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
140 head, track, sect, 1,
141 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
142 drv->max_track, drv->last_sect);
8977f3c1
FB		 143 return 2;
144 }
145 if (sect > drv->last_sect) {
ed5fd2cc
FB		 146 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
147 head, track, sect, 1,
148 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
149 drv->max_track, drv->last_sect);
8977f3c1
FB		 150 return 3;
151 }
152 sector = _fd_sector(head, track, sect, drv->last_sect);
baca51fa 153 ret = 0;
8977f3c1
FB		 154 if (sector != fd_sector(drv)) {
155#if 0
156 if (!enable_seek) {
157 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
158 head, track, sect, 1, drv->max_track, drv->last_sect);
159 return 4;
160 }
161#endif
162 drv->head = head;
baca51fa
FB		 163 if (drv->track != track)
164 ret = 1;
8977f3c1
FB		 165 drv->track = track;
166 drv->sect = sect;
8977f3c1
FB		 167 }
168
baca51fa 169 return ret;
8977f3c1
FB		 170}
171
172/* Set drive back to track 0 */
173static void fd_recalibrate (fdrive_t *drv)
174{
175 FLOPPY_DPRINTF("recalibrate\n");
176 drv->head = 0;
177 drv->track = 0;
178 drv->sect = 1;
179 drv->dir = 1;
180 drv->rw = 0;
181}
182
a541f297
FB		 183/* Recognize floppy formats */
184typedef struct fd_format_t {
185 fdrive_type_t drive;
186 fdisk_type_t disk;
187 uint8_t last_sect;
188 uint8_t max_track;
189 uint8_t max_head;
190 const unsigned char *str;
191} fd_format_t;
192
193static fd_format_t fd_formats[] = {
194 /* First entry is default format */
195 /* 1.44 MB 3"1/2 floppy disks */
196 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
197 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
198 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
199 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
200 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
201 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
202 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
203 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
204 /* 2.88 MB 3"1/2 floppy disks */
205 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
206 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
207 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
208 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
209 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
210 /* 720 kB 3"1/2 floppy disks */
211 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
212 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
213 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
214 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
215 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
216 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
217 /* 1.2 MB 5"1/4 floppy disks */
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
219 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
220 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
221 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
222 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
223 /* 720 kB 5"1/4 floppy disks */
224 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
225 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
226 /* 360 kB 5"1/4 floppy disks */
227 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
228 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
229 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
230 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
231 /* 320 kB 5"1/4 floppy disks */
232 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
233 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
234 /* 360 kB must match 5"1/4 better than 3"1/2... */
235 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
236 /* end */
237 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
238};
239
8977f3c1 240/* Revalidate a disk drive after a disk change */
caed8802 241static void fd_revalidate (fdrive_t *drv)
8977f3c1 242{
a541f297
FB		 243 fd_format_t *parse;
244 int64_t nb_sectors, size;
245 int i, first_match, match;
baca51fa 246 int nb_heads, max_track, last_sect, ro;
8977f3c1
FB		 247
248 FLOPPY_DPRINTF("revalidate\n");
baca51fa 249 drv->drflags &= ~FDRIVE_REVALIDATE;
a541f297 250 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
baca51fa 251 ro = bdrv_is_read_only(drv->bs);
a541f297 252 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
baca51fa 253 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
ed5fd2cc
FB		 254 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
255 nb_heads - 1, max_track, last_sect);
a541f297
FB		 256 } else {
257 bdrv_get_geometry(drv->bs, &nb_sectors);
258 match = -1;
259 first_match = -1;
260 for (i = 0;; i++) {
261 parse = &fd_formats[i];
262 if (parse->drive == FDRIVE_DRV_NONE)
263 break;
264 if (drv->drive == parse->drive ||
265 drv->drive == FDRIVE_DRV_NONE) {
266 size = (parse->max_head + 1) * parse->max_track *
267 parse->last_sect;
268 if (nb_sectors == size) {
269 match = i;
270 break;
271 }
272 if (first_match == -1)
273 first_match = i;
274 }
275 }
276 if (match == -1) {
277 if (first_match == -1)
278 match = 1;
279 else
280 match = first_match;
281 parse = &fd_formats[match];
282 }
283 nb_heads = parse->max_head + 1;
284 max_track = parse->max_track;
285 last_sect = parse->last_sect;
286 drv->drive = parse->drive;
ed5fd2cc
FB		 287 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
288 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
a541f297 289 }
baca51fa
FB		 290 if (nb_heads == 1) {
291 drv->flags &= ~FDISK_DBL_SIDES;
292 } else {
293 drv->flags |= FDISK_DBL_SIDES;
294 }
295 drv->max_track = max_track;
296 drv->last_sect = last_sect;
baca51fa 297 drv->ro = ro;
8977f3c1 298 } else {
ed5fd2cc 299 FLOPPY_DPRINTF("No disk in drive\n");
baca51fa
FB		 300 drv->last_sect = 0;
301 drv->max_track = 0;
302 drv->flags &= ~FDISK_DBL_SIDES;
8977f3c1 303 }
baca51fa 304 drv->drflags |= FDRIVE_REVALIDATE;
caed8802
FB		 305}
306
8977f3c1
FB		 307/* Motor control */
308static void fd_start (fdrive_t *drv)
309{
baca51fa 310 drv->drflags |= FDRIVE_MOTOR_ON;
8977f3c1
FB		 311}
312
313static void fd_stop (fdrive_t *drv)
314{
baca51fa 315 drv->drflags &= ~FDRIVE_MOTOR_ON;
8977f3c1
FB		 316}
317
318/* Re-initialise a drives (motor off, repositioned) */
319static void fd_reset (fdrive_t *drv)
320{
321 fd_stop(drv);
322 fd_recalibrate(drv);
323}
324
325/********************************************************/
4b19ec0c 326/* Intel 82078 floppy disk controller emulation */
8977f3c1 327
baca51fa
FB		 328static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
329static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
85571bc7
FB		 330static int fdctrl_transfer_handler (void *opaque, int nchan,
331 int dma_pos, int dma_len);
baca51fa 332static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
ed5fd2cc 333static void fdctrl_result_timer(void *opaque);
baca51fa
FB		 334
335static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
336static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
337static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
338static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
339static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
340static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
341static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
342static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
343static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
344static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
8977f3c1
FB		 345
346enum {
ed5fd2cc 347 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
8977f3c1 348 FD_CTRL_RESET = 0x02,
ed5fd2cc
FB		 349 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
350 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
8977f3c1
FB		 351 FD_CTRL_INTR = 0x10,
352};
353
354enum {
355 FD_DIR_WRITE = 0,
356 FD_DIR_READ = 1,
357 FD_DIR_SCANE = 2,
358 FD_DIR_SCANL = 3,
359 FD_DIR_SCANH = 4,
360};
361
362enum {
363 FD_STATE_CMD = 0x00,
364 FD_STATE_STATUS = 0x01,
365 FD_STATE_DATA = 0x02,
366 FD_STATE_STATE = 0x03,
367 FD_STATE_MULTI = 0x10,
368 FD_STATE_SEEK = 0x20,
baca51fa 369 FD_STATE_FORMAT = 0x40,
8977f3c1
FB		 370};
371
372#define FD_STATE(state) ((state) & FD_STATE_STATE)
baca51fa
FB		 373#define FD_SET_STATE(state, new_state) \
374do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
8977f3c1
FB		 375#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
376#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
baca51fa 377#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
8977f3c1 378
baca51fa
FB		 379struct fdctrl_t {
380 fdctrl_t *fdctrl;
4b19ec0c 381 /* Controller's identification */
8977f3c1
FB		 382 uint8_t version;
383 /* HW */
384 int irq_lvl;
385 int dma_chann;
baca51fa 386 uint32_t io_base;
4b19ec0c 387 /* Controller state */
ed5fd2cc 388 QEMUTimer *result_timer;
8977f3c1
FB		 389 uint8_t state;
390 uint8_t dma_en;
391 uint8_t cur_drv;
392 uint8_t bootsel;
393 /* Command FIFO */
394 uint8_t fifo[FD_SECTOR_LEN];
395 uint32_t data_pos;
396 uint32_t data_len;
397 uint8_t data_state;
398 uint8_t data_dir;
399 uint8_t int_status;
890fa6be 400 uint8_t eot; /* last wanted sector */
8977f3c1
FB		 401 /* States kept only to be returned back */
402 /* Timers state */
403 uint8_t timer0;
404 uint8_t timer1;
405 /* precompensation */
406 uint8_t precomp_trk;
407 uint8_t config;
408 uint8_t lock;
409 /* Power down config (also with status regB access mode */
410 uint8_t pwrd;
411 /* Floppy drives */
412 fdrive_t drives[2];
baca51fa
FB		 413};
414
415static uint32_t fdctrl_read (void *opaque, uint32_t reg)
416{
417 fdctrl_t *fdctrl = opaque;
418 uint32_t retval;
419
a541f297
FB		 420 switch (reg & 0x07) {
421 case 0x01:
baca51fa 422 retval = fdctrl_read_statusB(fdctrl);
a541f297
FB		 423 break;
424 case 0x02:
baca51fa 425 retval = fdctrl_read_dor(fdctrl);
a541f297
FB		 426 break;
427 case 0x03:
baca51fa 428 retval = fdctrl_read_tape(fdctrl);
a541f297
FB		 429 break;
430 case 0x04:
baca51fa 431 retval = fdctrl_read_main_status(fdctrl);
a541f297
FB		 432 break;
433 case 0x05:
baca51fa 434 retval = fdctrl_read_data(fdctrl);
a541f297
FB		 435 break;
436 case 0x07:
baca51fa 437 retval = fdctrl_read_dir(fdctrl);
a541f297
FB		 438 break;
439 default:
baca51fa 440 retval = (uint32_t)(-1);
a541f297
FB		 441 break;
442 }
ed5fd2cc 443 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
baca51fa
FB		 444
445 return retval;
446}
447
448static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
449{
450 fdctrl_t *fdctrl = opaque;
451
ed5fd2cc
FB		 452 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
453
a541f297
FB		 454 switch (reg & 0x07) {
455 case 0x02:
baca51fa 456 fdctrl_write_dor(fdctrl, value);
a541f297
FB		 457 break;
458 case 0x03:
baca51fa 459 fdctrl_write_tape(fdctrl, value);
a541f297
FB		 460 break;
461 case 0x04:
baca51fa 462 fdctrl_write_rate(fdctrl, value);
a541f297
FB		 463 break;
464 case 0x05:
baca51fa 465 fdctrl_write_data(fdctrl, value);
a541f297
FB		 466 break;
467 default:
468 break;
469 }
baca51fa
FB		 470}
471
e80cfcfc
FB		 472static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
473 fdctrl_read,
474 fdctrl_read,
475 fdctrl_read,
476};
477
478static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
479 fdctrl_write,
480 fdctrl_write,
481 fdctrl_write,
482};
483
baca51fa
FB		 484static void fd_change_cb (void *opaque)
485{
486 fdrive_t *drv = opaque;
8977f3c1 487
baca51fa 488 FLOPPY_DPRINTF("disk change\n");
baca51fa
FB		 489 fd_revalidate(drv);
490#if 0
491 fd_recalibrate(drv);
492 fdctrl_reset_fifo(drv->fdctrl);
493 fdctrl_raise_irq(drv->fdctrl, 0x20);
494#endif
495}
8977f3c1 496
baca51fa
FB		 497fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
498 uint32_t io_base,
499 BlockDriverState **fds)
8977f3c1 500{
baca51fa 501 fdctrl_t *fdctrl;
e80cfcfc 502 int io_mem;
8977f3c1
FB		 503 int i;
504
4b19ec0c 505 FLOPPY_DPRINTF("init controller\n");
baca51fa
FB		 506 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
507 if (!fdctrl)
508 return NULL;
ed5fd2cc
FB		 509 fdctrl->result_timer = qemu_new_timer(vm_clock,
510 fdctrl_result_timer, fdctrl);
511
4b19ec0c 512 fdctrl->version = 0x90; /* Intel 82078 controller */
baca51fa
FB		 513 fdctrl->irq_lvl = irq_lvl;
514 fdctrl->dma_chann = dma_chann;
515 fdctrl->io_base = io_base;
a541f297 516 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
baca51fa
FB		 517 if (fdctrl->dma_chann != -1) {
518 fdctrl->dma_en = 1;
519 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
8977f3c1 520 } else {
baca51fa 521 fdctrl->dma_en = 0;
8977f3c1 522 }
baca51fa
FB		 523 for (i = 0; i < 2; i++) {
524 fd_init(&fdctrl->drives[i], fds[i]);
525 if (fds[i]) {
526 bdrv_set_change_cb(fds[i],
527 &fd_change_cb, &fdctrl->drives[i]);
528 }
caed8802 529 }
baca51fa
FB		 530 fdctrl_reset(fdctrl, 0);
531 fdctrl->state = FD_CTRL_ACTIVE;
8977f3c1 532 if (mem_mapped) {
e80cfcfc
FB		 533 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write, fdctrl);
534 cpu_register_physical_memory(io_base, 0x08, io_mem);
8977f3c1 535 } else {
baca51fa
FB		 536 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
537 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
538 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
539 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
8977f3c1 540 }
a541f297 541 for (i = 0; i < 2; i++) {
baca51fa 542 fd_revalidate(&fdctrl->drives[i]);
8977f3c1 543 }
a541f297 544
baca51fa 545 return fdctrl;
caed8802 546}
8977f3c1 547
baca51fa
FB		 548/* XXX: may change if moved to bdrv */
549int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
caed8802 550{
baca51fa 551 return fdctrl->drives[drive_num].drive;
8977f3c1
FB		 552}
553
554/* Change IRQ state */
baca51fa 555static void fdctrl_reset_irq (fdctrl_t *fdctrl)
8977f3c1 556{
ed5fd2cc
FB		 557 FLOPPY_DPRINTF("Reset interrupt\n");
558 pic_set_irq(fdctrl->irq_lvl, 0);
559 fdctrl->state &= ~FD_CTRL_INTR;
8977f3c1
FB		 560}
561
baca51fa 562static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
8977f3c1 563{
baca51fa
FB		 564 if (~(fdctrl->state & FD_CTRL_INTR)) {
565 pic_set_irq(fdctrl->irq_lvl, 1);
566 fdctrl->state |= FD_CTRL_INTR;
8977f3c1
FB		 567 }
568 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
baca51fa 569 fdctrl->int_status = status;
8977f3c1
FB		 570}
571
4b19ec0c 572/* Reset controller */
baca51fa 573static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
8977f3c1
FB		 574{
575 int i;
576
4b19ec0c 577 FLOPPY_DPRINTF("reset controller\n");
baca51fa 578 fdctrl_reset_irq(fdctrl);
4b19ec0c 579 /* Initialise controller */
baca51fa 580 fdctrl->cur_drv = 0;
8977f3c1 581 /* FIFO state */
baca51fa
FB		 582 fdctrl->data_pos = 0;
583 fdctrl->data_len = 0;
584 fdctrl->data_state = FD_STATE_CMD;
585 fdctrl->data_dir = FD_DIR_WRITE;
8977f3c1 586 for (i = 0; i < MAX_FD; i++)
baca51fa
FB		 587 fd_reset(&fdctrl->drives[i]);
588 fdctrl_reset_fifo(fdctrl);
8977f3c1 589 if (do_irq)
ed5fd2cc 590 fdctrl_raise_irq(fdctrl, 0xc0);
baca51fa
FB		 591}
592
593static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
594{
595 return &fdctrl->drives[fdctrl->bootsel];
596}
597
598static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
599{
600 return &fdctrl->drives[1 - fdctrl->bootsel];
601}
602
603static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
604{
605 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
8977f3c1
FB		 606}
607
608/* Status B register : 0x01 (read-only) */
baca51fa 609static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
8977f3c1 610{
8977f3c1 611 FLOPPY_DPRINTF("status register: 0x00\n");
8977f3c1
FB		 612 return 0;
613}
614
615/* Digital output register : 0x02 */
baca51fa 616static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
8977f3c1 617{
8977f3c1
FB		 618 uint32_t retval = 0;
619
8977f3c1 620 /* Drive motors state indicators */
baca51fa
FB		 621 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
622 retval |= 1 << 5;
623 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
624 retval |= 1 << 4;
8977f3c1 625 /* DMA enable */
baca51fa 626 retval |= fdctrl->dma_en << 3;
8977f3c1 627 /* Reset indicator */
baca51fa 628 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
8977f3c1 629 /* Selected drive */
baca51fa 630 retval |= fdctrl->cur_drv;
8977f3c1
FB		 631 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
632
633 return retval;
634}
635
baca51fa 636static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
8977f3c1 637{
8977f3c1 638 /* Reset mode */
baca51fa 639 if (fdctrl->state & FD_CTRL_RESET) {
8977f3c1 640 if (!(value & 0x04)) {
4b19ec0c 641 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 642 return;
643 }
644 }
645 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
646 /* Drive motors state indicators */
647 if (value & 0x20)
baca51fa 648 fd_start(drv1(fdctrl));
8977f3c1 649 else
baca51fa 650 fd_stop(drv1(fdctrl));
8977f3c1 651 if (value & 0x10)
baca51fa 652 fd_start(drv0(fdctrl));
8977f3c1 653 else
baca51fa 654 fd_stop(drv0(fdctrl));
8977f3c1
FB		 655 /* DMA enable */
656#if 0
baca51fa
FB		 657 if (fdctrl->dma_chann != -1)
658 fdctrl->dma_en = 1 - ((value >> 3) & 1);
8977f3c1
FB		 659#endif
660 /* Reset */
661 if (!(value & 0x04)) {
baca51fa 662 if (!(fdctrl->state & FD_CTRL_RESET)) {
4b19ec0c 663 FLOPPY_DPRINTF("controller enter RESET state\n");
baca51fa 664 fdctrl->state |= FD_CTRL_RESET;
8977f3c1
FB		 665 }
666 } else {
baca51fa 667 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 668 FLOPPY_DPRINTF("controller out of RESET state\n");
fb6cf1d0 669 fdctrl_reset(fdctrl, 1);
baca51fa 670 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
8977f3c1
FB		 671 }
672 }
673 /* Selected drive */
baca51fa 674 fdctrl->cur_drv = value & 1;
8977f3c1
FB		 675}
676
677/* Tape drive register : 0x03 */
baca51fa 678static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
8977f3c1
FB		 679{
680 uint32_t retval = 0;
681
8977f3c1 682 /* Disk boot selection indicator */
baca51fa 683 retval |= fdctrl->bootsel << 2;
8977f3c1
FB		 684 /* Tape indicators: never allowed */
685 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
686
687 return retval;
688}
689
baca51fa 690static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
8977f3c1 691{
8977f3c1 692 /* Reset mode */
baca51fa 693 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 694 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 695 return;
696 }
697 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
698 /* Disk boot selection indicator */
baca51fa 699 fdctrl->bootsel = (value >> 2) & 1;
8977f3c1
FB		 700 /* Tape indicators: never allow */
701}
702
703/* Main status register : 0x04 (read) */
baca51fa 704static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
8977f3c1
FB		 705{
706 uint32_t retval = 0;
707
baca51fa
FB		 708 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
709 if (!(fdctrl->state & FD_CTRL_BUSY)) {
8977f3c1
FB		 710 /* Data transfer allowed */
711 retval |= 0x80;
712 /* Data transfer direction indicator */
baca51fa 713 if (fdctrl->data_dir == FD_DIR_READ)
8977f3c1
FB		 714 retval |= 0x40;
715 }
716 /* Should handle 0x20 for SPECIFY command */
717 /* Command busy indicator */
baca51fa
FB		 718 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
719 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
8977f3c1
FB		 720 retval |= 0x10;
721 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
722
723 return retval;
724}
725
726/* Data select rate register : 0x04 (write) */
baca51fa 727static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
8977f3c1 728{
8977f3c1 729 /* Reset mode */
baca51fa 730 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 731 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 732 return;
733 }
8977f3c1
FB		 734 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
735 /* Reset: autoclear */
736 if (value & 0x80) {
baca51fa
FB		 737 fdctrl->state |= FD_CTRL_RESET;
738 fdctrl_reset(fdctrl, 1);
739 fdctrl->state &= ~FD_CTRL_RESET;
8977f3c1
FB		 740 }
741 if (value & 0x40) {
baca51fa
FB		 742 fdctrl->state |= FD_CTRL_SLEEP;
743 fdctrl_reset(fdctrl, 1);
8977f3c1
FB		 744 }
745// fdctrl.precomp = (value >> 2) & 0x07;
746}
747
748/* Digital input register : 0x07 (read-only) */
baca51fa 749static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
8977f3c1 750{
8977f3c1
FB		 751 uint32_t retval = 0;
752
baca51fa
FB		 753 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
754 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
8977f3c1
FB		 755 retval |= 0x80;
756 if (retval != 0)
baca51fa
FB		 757 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
758 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
759 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
8977f3c1
FB		 760
761 return retval;
762}
763
764/* FIFO state control */
baca51fa 765static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
8977f3c1 766{
baca51fa
FB		 767 fdctrl->data_dir = FD_DIR_WRITE;
768 fdctrl->data_pos = 0;
769 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
8977f3c1
FB		 770}
771
772/* Set FIFO status for the host to read */
baca51fa 773static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
8977f3c1 774{
baca51fa
FB		 775 fdctrl->data_dir = FD_DIR_READ;
776 fdctrl->data_len = fifo_len;
777 fdctrl->data_pos = 0;
778 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
8977f3c1 779 if (do_irq)
baca51fa 780 fdctrl_raise_irq(fdctrl, 0x00);
8977f3c1
FB		 781}
782
783/* Set an error: unimplemented/unknown command */
baca51fa 784static void fdctrl_unimplemented (fdctrl_t *fdctrl)
8977f3c1
FB		 785{
786#if 0
baca51fa
FB		 787 fdrive_t *cur_drv;
788
789 cur_drv = get_cur_drv(fdctrl);
890fa6be 790 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
baca51fa
FB		 791 fdctrl->fifo[1] = 0x00;
792 fdctrl->fifo[2] = 0x00;
793 fdctrl_set_fifo(fdctrl, 3, 1);
8977f3c1 794#else
baca51fa
FB		 795 // fdctrl_reset_fifo(fdctrl);
796 fdctrl->fifo[0] = 0x80;
797 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 798#endif
799}
800
801/* Callback for transfer end (stop or abort) */
baca51fa
FB		 802static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
803 uint8_t status1, uint8_t status2)
8977f3c1 804{
baca51fa 805 fdrive_t *cur_drv;
8977f3c1 806
baca51fa 807 cur_drv = get_cur_drv(fdctrl);
8977f3c1
FB		 808 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
809 status0, status1, status2,
890fa6be
FB		 810 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
811 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
baca51fa
FB		 812 fdctrl->fifo[1] = status1;
813 fdctrl->fifo[2] = status2;
814 fdctrl->fifo[3] = cur_drv->track;
815 fdctrl->fifo[4] = cur_drv->head;
816 fdctrl->fifo[5] = cur_drv->sect;
817 fdctrl->fifo[6] = FD_SECTOR_SC;
818 fdctrl->data_dir = FD_DIR_READ;
ed5fd2cc 819 if (fdctrl->state & FD_CTRL_BUSY) {
baca51fa 820 DMA_release_DREQ(fdctrl->dma_chann);
ed5fd2cc
FB		 821 fdctrl->state &= ~FD_CTRL_BUSY;
822 }
baca51fa 823 fdctrl_set_fifo(fdctrl, 7, 1);
8977f3c1
FB		 824}
825
826/* Prepare a data transfer (either DMA or FIFO) */
baca51fa 827static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
8977f3c1 828{
baca51fa 829 fdrive_t *cur_drv;
8977f3c1
FB		 830 uint8_t kh, kt, ks;
831 int did_seek;
832
baca51fa
FB		 833 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
834 cur_drv = get_cur_drv(fdctrl);
835 kt = fdctrl->fifo[2];
836 kh = fdctrl->fifo[3];
837 ks = fdctrl->fifo[4];
4b19ec0c 838 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
baca51fa 839 fdctrl->cur_drv, kh, kt, ks,
8977f3c1
FB		 840 _fd_sector(kh, kt, ks, cur_drv->last_sect));
841 did_seek = 0;
baca51fa 842 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
8977f3c1
FB		 843 case 2:
844 /* sect too big */
baca51fa
FB		 845 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
846 fdctrl->fifo[3] = kt;
847 fdctrl->fifo[4] = kh;
848 fdctrl->fifo[5] = ks;
8977f3c1
FB		 849 return;
850 case 3:
851 /* track too big */
baca51fa
FB		 852 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
853 fdctrl->fifo[3] = kt;
854 fdctrl->fifo[4] = kh;
855 fdctrl->fifo[5] = ks;
8977f3c1
FB		 856 return;
857 case 4:
858 /* No seek enabled */
baca51fa
FB		 859 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
860 fdctrl->fifo[3] = kt;
861 fdctrl->fifo[4] = kh;
862 fdctrl->fifo[5] = ks;
8977f3c1
FB		 863 return;
864 case 1:
865 did_seek = 1;
866 break;
867 default:
868 break;
869 }
870 /* Set the FIFO state */
baca51fa
FB		 871 fdctrl->data_dir = direction;
872 fdctrl->data_pos = 0;
873 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
874 if (fdctrl->fifo[0] & 0x80)
875 fdctrl->data_state |= FD_STATE_MULTI;
876 else
877 fdctrl->data_state &= ~FD_STATE_MULTI;
8977f3c1 878 if (did_seek)
baca51fa
FB		 879 fdctrl->data_state |= FD_STATE_SEEK;
880 else
881 fdctrl->data_state &= ~FD_STATE_SEEK;
882 if (fdctrl->fifo[5] == 00) {
883 fdctrl->data_len = fdctrl->fifo[8];
884 } else {
885 int tmp;
886 fdctrl->data_len = 128 << fdctrl->fifo[5];
887 tmp = (cur_drv->last_sect - ks + 1);
888 if (fdctrl->fifo[0] & 0x80)
889 tmp += cur_drv->last_sect;
890 fdctrl->data_len *= tmp;
891 }
890fa6be 892 fdctrl->eot = fdctrl->fifo[6];
baca51fa 893 if (fdctrl->dma_en) {
8977f3c1
FB		 894 int dma_mode;
895 /* DMA transfer are enabled. Check if DMA channel is well programmed */
baca51fa 896 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
8977f3c1 897 dma_mode = (dma_mode >> 2) & 3;
baca51fa
FB		 898 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
899 dma_mode, direction,
900 (128 << fdctrl->fifo[5]) *
901 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
8977f3c1
FB		 902 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
903 direction == FD_DIR_SCANH) && dma_mode == 0) ||
904 (direction == FD_DIR_WRITE && dma_mode == 2) ||
905 (direction == FD_DIR_READ && dma_mode == 1)) {
906 /* No access is allowed until DMA transfer has completed */
baca51fa 907 fdctrl->state |= FD_CTRL_BUSY;
4b19ec0c 908 /* Now, we just have to wait for the DMA controller to
8977f3c1
FB		 909 * recall us...
910 */
baca51fa
FB		 911 DMA_hold_DREQ(fdctrl->dma_chann);
912 DMA_schedule(fdctrl->dma_chann);
8977f3c1 913 return;
baca51fa
FB		 914 } else {
915 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
8977f3c1
FB		 916 }
917 }
918 FLOPPY_DPRINTF("start non-DMA transfer\n");
919 /* IO based transfer: calculate len */
baca51fa 920 fdctrl_raise_irq(fdctrl, 0x00);
8977f3c1
FB		 921
922 return;
923}
924
925/* Prepare a transfer of deleted data */
baca51fa 926static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
8977f3c1
FB		 927{
928 /* We don't handle deleted data,
929 * so we don't return *ANYTHING*
930 */
baca51fa 931 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
8977f3c1
FB		 932}
933
934/* handlers for DMA transfers */
85571bc7
FB		 935static int fdctrl_transfer_handler (void *opaque, int nchan,
936 int dma_pos, int dma_len)
8977f3c1 937{
baca51fa
FB		 938 fdctrl_t *fdctrl;
939 fdrive_t *cur_drv;
940 int len, start_pos, rel_pos;
8977f3c1
FB		 941 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
942
baca51fa 943 fdctrl = opaque;
baca51fa 944 if (!(fdctrl->state & FD_CTRL_BUSY)) {
8977f3c1
FB		 945 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
946 return 0;
947 }
baca51fa
FB		 948 cur_drv = get_cur_drv(fdctrl);
949 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
950 fdctrl->data_dir == FD_DIR_SCANH)
8977f3c1 951 status2 = 0x04;
85571bc7
FB		 952 if (dma_len > fdctrl->data_len)
953 dma_len = fdctrl->data_len;
890fa6be 954 if (cur_drv->bs == NULL) {
baca51fa
FB		 955 if (fdctrl->data_dir == FD_DIR_WRITE)
956 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
957 else
958 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
959 len = 0;
890fa6be
FB		 960 goto transfer_error;
961 }
baca51fa 962 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
85571bc7
FB		 963 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
964 len = dma_len - fdctrl->data_pos;
baca51fa
FB		 965 if (len + rel_pos > FD_SECTOR_LEN)
966 len = FD_SECTOR_LEN - rel_pos;
967 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
968 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
969 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
970 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
971 fd_sector(cur_drv) * 512, addr);
972 if (fdctrl->data_dir != FD_DIR_WRITE ||
973 len < FD_SECTOR_LEN || rel_pos != 0) {
974 /* READ & SCAN commands and realign to a sector for WRITE */
975 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
976 fdctrl->fifo, 1) < 0) {
8977f3c1
FB		 977 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
978 fd_sector(cur_drv));
979 /* Sure, image size is too small... */
baca51fa 980 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
8977f3c1 981 }
890fa6be 982 }
baca51fa
FB		 983 switch (fdctrl->data_dir) {
984 case FD_DIR_READ:
985 /* READ commands */
85571bc7
FB		 986 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
987 fdctrl->data_pos, len);
988/* cpu_physical_memory_write(addr + fdctrl->data_pos, */
989/* fdctrl->fifo + rel_pos, len); */
baca51fa
FB		 990 break;
991 case FD_DIR_WRITE:
992 /* WRITE commands */
85571bc7
FB		 993 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
994 fdctrl->data_pos, len);
995/* cpu_physical_memory_read(addr + fdctrl->data_pos, */
996/* fdctrl->fifo + rel_pos, len); */
baca51fa
FB		 997 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
998 fdctrl->fifo, 1) < 0) {
999 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1000 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1001 goto transfer_error;
890fa6be 1002 }
baca51fa
FB		 1003 break;
1004 default:
1005 /* SCAN commands */
1006 {
1007 uint8_t tmpbuf[FD_SECTOR_LEN];
1008 int ret;
85571bc7
FB		 1009 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1010/* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1011/* tmpbuf, len); */
baca51fa 1012 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
8977f3c1
FB		 1013 if (ret == 0) {
1014 status2 = 0x08;
1015 goto end_transfer;
1016 }
baca51fa
FB		 1017 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1018 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
8977f3c1
FB		 1019 status2 = 0x00;
1020 goto end_transfer;
1021 }
1022 }
baca51fa 1023 break;
8977f3c1 1024 }
baca51fa
FB		 1025 fdctrl->data_pos += len;
1026 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1027 if (rel_pos == 0) {
8977f3c1 1028 /* Seek to next sector */
baca51fa
FB		 1029 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1030 cur_drv->head, cur_drv->track, cur_drv->sect,
1031 fd_sector(cur_drv),
1032 fdctrl->data_pos - size);
890fa6be
FB		 1033 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1034 error in fact */
1035 if (cur_drv->sect >= cur_drv->last_sect ||
1036 cur_drv->sect == fdctrl->eot) {
baca51fa
FB		 1037 cur_drv->sect = 1;
1038 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1039 if (cur_drv->head == 0 &&
1040 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
890fa6be
FB		 1041 cur_drv->head = 1;
1042 } else {
1043 cur_drv->head = 0;
baca51fa
FB		 1044 cur_drv->track++;
1045 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1046 break;
890fa6be
FB		 1047 }
1048 } else {
1049 cur_drv->track++;
1050 break;
8977f3c1 1051 }
baca51fa
FB		 1052 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1053 cur_drv->head, cur_drv->track,
1054 cur_drv->sect, fd_sector(cur_drv));
890fa6be
FB		 1055 } else {
1056 cur_drv->sect++;
8977f3c1
FB		 1057 }
1058 }
1059 }
1060end_transfer:
baca51fa
FB		 1061 len = fdctrl->data_pos - start_pos;
1062 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1063 fdctrl->data_pos, len, fdctrl->data_len);
1064 if (fdctrl->data_dir == FD_DIR_SCANE ||
1065 fdctrl->data_dir == FD_DIR_SCANL ||
1066 fdctrl->data_dir == FD_DIR_SCANH)
8977f3c1 1067 status2 = 0x08;
baca51fa 1068 if (FD_DID_SEEK(fdctrl->data_state))
8977f3c1 1069 status0 |= 0x20;
baca51fa
FB		 1070 fdctrl->data_len -= len;
1071 // if (fdctrl->data_len == 0)
890fa6be 1072 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
8977f3c1
FB		 1073transfer_error:
1074
baca51fa 1075 return len;
8977f3c1
FB		 1076}
1077
8977f3c1 1078/* Data register : 0x05 */
baca51fa 1079static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
8977f3c1 1080{
baca51fa 1081 fdrive_t *cur_drv;
8977f3c1
FB		 1082 uint32_t retval = 0;
1083 int pos, len;
1084
baca51fa
FB		 1085 cur_drv = get_cur_drv(fdctrl);
1086 fdctrl->state &= ~FD_CTRL_SLEEP;
1087 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
8977f3c1
FB		 1088 FLOPPY_ERROR("can't read data in CMD state\n");
1089 return 0;
1090 }
baca51fa
FB		 1091 pos = fdctrl->data_pos;
1092 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
8977f3c1
FB		 1093 pos %= FD_SECTOR_LEN;
1094 if (pos == 0) {
baca51fa 1095 len = fdctrl->data_len - fdctrl->data_pos;
8977f3c1
FB		 1096 if (len > FD_SECTOR_LEN)
1097 len = FD_SECTOR_LEN;
1098 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
baca51fa 1099 fdctrl->fifo, len);
8977f3c1
FB		 1100 }
1101 }
baca51fa
FB		 1102 retval = fdctrl->fifo[pos];
1103 if (++fdctrl->data_pos == fdctrl->data_len) {
1104 fdctrl->data_pos = 0;
890fa6be 1105 /* Switch from transfer mode to status mode
8977f3c1
FB		 1106 * then from status mode to command mode
1107 */
ed5fd2cc 1108 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
baca51fa 1109 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
ed5fd2cc 1110 } else {
baca51fa 1111 fdctrl_reset_fifo(fdctrl);
ed5fd2cc
FB		 1112 fdctrl_reset_irq(fdctrl);
1113 }
8977f3c1
FB		 1114 }
1115 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1116
1117 return retval;
1118}
1119
baca51fa 1120static void fdctrl_format_sector (fdctrl_t *fdctrl)
8977f3c1 1121{
baca51fa
FB		 1122 fdrive_t *cur_drv;
1123 uint8_t kh, kt, ks;
1124 int did_seek;
8977f3c1 1125
baca51fa
FB		 1126 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1127 cur_drv = get_cur_drv(fdctrl);
1128 kt = fdctrl->fifo[6];
1129 kh = fdctrl->fifo[7];
1130 ks = fdctrl->fifo[8];
1131 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1132 fdctrl->cur_drv, kh, kt, ks,
1133 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1134 did_seek = 0;
1135 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1136 case 2:
1137 /* sect too big */
1138 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1139 fdctrl->fifo[3] = kt;
1140 fdctrl->fifo[4] = kh;
1141 fdctrl->fifo[5] = ks;
1142 return;
1143 case 3:
1144 /* track too big */
1145 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1146 fdctrl->fifo[3] = kt;
1147 fdctrl->fifo[4] = kh;
1148 fdctrl->fifo[5] = ks;
1149 return;
1150 case 4:
1151 /* No seek enabled */
1152 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1153 fdctrl->fifo[3] = kt;
1154 fdctrl->fifo[4] = kh;
1155 fdctrl->fifo[5] = ks;
1156 return;
1157 case 1:
1158 did_seek = 1;
1159 fdctrl->data_state |= FD_STATE_SEEK;
1160 break;
1161 default:
1162 break;
1163 }
1164 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1165 if (cur_drv->bs == NULL ||
1166 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1167 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1168 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1169 } else {
1170 if (cur_drv->sect == cur_drv->last_sect) {
1171 fdctrl->data_state &= ~FD_STATE_FORMAT;
1172 /* Last sector done */
1173 if (FD_DID_SEEK(fdctrl->data_state))
1174 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1175 else
1176 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1177 } else {
1178 /* More to do */
1179 fdctrl->data_pos = 0;
1180 fdctrl->data_len = 4;
1181 }
1182 }
1183}
1184
1185static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1186{
1187 fdrive_t *cur_drv;
1188
baca51fa 1189 cur_drv = get_cur_drv(fdctrl);
8977f3c1 1190 /* Reset mode */
baca51fa 1191 if (fdctrl->state & FD_CTRL_RESET) {
4b19ec0c 1192 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
8977f3c1
FB		 1193 return;
1194 }
baca51fa
FB		 1195 fdctrl->state &= ~FD_CTRL_SLEEP;
1196 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
8977f3c1
FB		 1197 FLOPPY_ERROR("can't write data in status mode\n");
1198 return;
1199 }
1200 /* Is it write command time ? */
baca51fa 1201 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
8977f3c1 1202 /* FIFO data write */
baca51fa
FB		 1203 fdctrl->fifo[fdctrl->data_pos++] = value;
1204 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1205 fdctrl->data_pos == fdctrl->data_len) {
8977f3c1 1206 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
baca51fa 1207 fdctrl->fifo, FD_SECTOR_LEN);
8977f3c1 1208 }
890fa6be 1209 /* Switch from transfer mode to status mode
8977f3c1
FB		 1210 * then from status mode to command mode
1211 */
baca51fa
FB		 1212 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1213 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
8977f3c1
FB		 1214 return;
1215 }
baca51fa 1216 if (fdctrl->data_pos == 0) {
8977f3c1
FB		 1217 /* Command */
1218 switch (value & 0x5F) {
1219 case 0x46:
1220 /* READ variants */
1221 FLOPPY_DPRINTF("READ command\n");
1222 /* 8 parameters cmd */
baca51fa 1223 fdctrl->data_len = 9;
8977f3c1
FB		 1224 goto enqueue;
1225 case 0x4C:
1226 /* READ_DELETED variants */
1227 FLOPPY_DPRINTF("READ_DELETED command\n");
1228 /* 8 parameters cmd */
baca51fa 1229 fdctrl->data_len = 9;
8977f3c1
FB		 1230 goto enqueue;
1231 case 0x50:
1232 /* SCAN_EQUAL variants */
1233 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1234 /* 8 parameters cmd */
baca51fa 1235 fdctrl->data_len = 9;
8977f3c1
FB		 1236 goto enqueue;
1237 case 0x56:
1238 /* VERIFY variants */
1239 FLOPPY_DPRINTF("VERIFY command\n");
1240 /* 8 parameters cmd */
baca51fa 1241 fdctrl->data_len = 9;
8977f3c1
FB		 1242 goto enqueue;
1243 case 0x59:
1244 /* SCAN_LOW_OR_EQUAL variants */
1245 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1246 /* 8 parameters cmd */
baca51fa 1247 fdctrl->data_len = 9;
8977f3c1
FB		 1248 goto enqueue;
1249 case 0x5D:
1250 /* SCAN_HIGH_OR_EQUAL variants */
1251 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1252 /* 8 parameters cmd */
baca51fa 1253 fdctrl->data_len = 9;
8977f3c1
FB		 1254 goto enqueue;
1255 default:
1256 break;
1257 }
1258 switch (value & 0x7F) {
1259 case 0x45:
1260 /* WRITE variants */
1261 FLOPPY_DPRINTF("WRITE command\n");
1262 /* 8 parameters cmd */
baca51fa 1263 fdctrl->data_len = 9;
8977f3c1
FB		 1264 goto enqueue;
1265 case 0x49:
1266 /* WRITE_DELETED variants */
1267 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1268 /* 8 parameters cmd */
baca51fa 1269 fdctrl->data_len = 9;
8977f3c1
FB		 1270 goto enqueue;
1271 default:
1272 break;
1273 }
1274 switch (value) {
1275 case 0x03:
1276 /* SPECIFY */
1277 FLOPPY_DPRINTF("SPECIFY command\n");
1278 /* 1 parameter cmd */
baca51fa 1279 fdctrl->data_len = 3;
8977f3c1
FB		 1280 goto enqueue;
1281 case 0x04:
1282 /* SENSE_DRIVE_STATUS */
1283 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1284 /* 1 parameter cmd */
baca51fa 1285 fdctrl->data_len = 2;
8977f3c1
FB		 1286 goto enqueue;
1287 case 0x07:
1288 /* RECALIBRATE */
1289 FLOPPY_DPRINTF("RECALIBRATE command\n");
1290 /* 1 parameter cmd */
baca51fa 1291 fdctrl->data_len = 2;
8977f3c1
FB		 1292 goto enqueue;
1293 case 0x08:
1294 /* SENSE_INTERRUPT_STATUS */
1295 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
baca51fa 1296 fdctrl->int_status);
8977f3c1 1297 /* No parameters cmd: returns status if no interrupt */
953569d2 1298#if 0
baca51fa
FB		 1299 fdctrl->fifo[0] =
1300 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
953569d2
FB		 1301#else
1302 /* XXX: int_status handling is broken for read/write
1303 commands, so we do this hack. It should be suppressed
1304 ASAP */
1305 fdctrl->fifo[0] =
1306 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1307#endif
baca51fa
FB		 1308 fdctrl->fifo[1] = cur_drv->track;
1309 fdctrl_set_fifo(fdctrl, 2, 0);
1310 fdctrl_reset_irq(fdctrl);
1311 fdctrl->int_status = 0xC0;
8977f3c1
FB		 1312 return;
1313 case 0x0E:
1314 /* DUMPREG */
1315 FLOPPY_DPRINTF("DUMPREG command\n");
1316 /* Drives position */
baca51fa
FB		 1317 fdctrl->fifo[0] = drv0(fdctrl)->track;
1318 fdctrl->fifo[1] = drv1(fdctrl)->track;
1319 fdctrl->fifo[2] = 0;
1320 fdctrl->fifo[3] = 0;
8977f3c1 1321 /* timers */
baca51fa
FB		 1322 fdctrl->fifo[4] = fdctrl->timer0;
1323 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1324 fdctrl->fifo[6] = cur_drv->last_sect;
1325 fdctrl->fifo[7] = (fdctrl->lock << 7) |
8977f3c1 1326 (cur_drv->perpendicular << 2);
baca51fa
FB		 1327 fdctrl->fifo[8] = fdctrl->config;
1328 fdctrl->fifo[9] = fdctrl->precomp_trk;
1329 fdctrl_set_fifo(fdctrl, 10, 0);
8977f3c1
FB		 1330 return;
1331 case 0x0F:
1332 /* SEEK */
1333 FLOPPY_DPRINTF("SEEK command\n");
1334 /* 2 parameters cmd */
baca51fa 1335 fdctrl->data_len = 3;
8977f3c1
FB		 1336 goto enqueue;
1337 case 0x10:
1338 /* VERSION */
1339 FLOPPY_DPRINTF("VERSION command\n");
1340 /* No parameters cmd */
4b19ec0c 1341 /* Controller's version */
baca51fa
FB		 1342 fdctrl->fifo[0] = fdctrl->version;
1343 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1344 return;
1345 case 0x12:
1346 /* PERPENDICULAR_MODE */
1347 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1348 /* 1 parameter cmd */
baca51fa 1349 fdctrl->data_len = 2;
8977f3c1
FB		 1350 goto enqueue;
1351 case 0x13:
1352 /* CONFIGURE */
1353 FLOPPY_DPRINTF("CONFIGURE command\n");
1354 /* 3 parameters cmd */
baca51fa 1355 fdctrl->data_len = 4;
8977f3c1
FB		 1356 goto enqueue;
1357 case 0x14:
1358 /* UNLOCK */
1359 FLOPPY_DPRINTF("UNLOCK command\n");
1360 /* No parameters cmd */
baca51fa
FB		 1361 fdctrl->lock = 0;
1362 fdctrl->fifo[0] = 0;
1363 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 1364 return;
1365 case 0x17:
1366 /* POWERDOWN_MODE */
1367 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1368 /* 2 parameters cmd */
baca51fa 1369 fdctrl->data_len = 3;
8977f3c1
FB		 1370 goto enqueue;
1371 case 0x18:
1372 /* PART_ID */
1373 FLOPPY_DPRINTF("PART_ID command\n");
1374 /* No parameters cmd */
baca51fa
FB		 1375 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1376 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 1377 return;
1378 case 0x2C:
1379 /* SAVE */
1380 FLOPPY_DPRINTF("SAVE command\n");
1381 /* No parameters cmd */
baca51fa
FB		 1382 fdctrl->fifo[0] = 0;
1383 fdctrl->fifo[1] = 0;
8977f3c1 1384 /* Drives position */
baca51fa
FB		 1385 fdctrl->fifo[2] = drv0(fdctrl)->track;
1386 fdctrl->fifo[3] = drv1(fdctrl)->track;
1387 fdctrl->fifo[4] = 0;
1388 fdctrl->fifo[5] = 0;
8977f3c1 1389 /* timers */
baca51fa
FB		 1390 fdctrl->fifo[6] = fdctrl->timer0;
1391 fdctrl->fifo[7] = fdctrl->timer1;
1392 fdctrl->fifo[8] = cur_drv->last_sect;
1393 fdctrl->fifo[9] = (fdctrl->lock << 7) |
8977f3c1 1394 (cur_drv->perpendicular << 2);
baca51fa
FB		 1395 fdctrl->fifo[10] = fdctrl->config;
1396 fdctrl->fifo[11] = fdctrl->precomp_trk;
1397 fdctrl->fifo[12] = fdctrl->pwrd;
1398 fdctrl->fifo[13] = 0;
1399 fdctrl->fifo[14] = 0;
1400 fdctrl_set_fifo(fdctrl, 15, 1);
8977f3c1
FB		 1401 return;
1402 case 0x33:
1403 /* OPTION */
1404 FLOPPY_DPRINTF("OPTION command\n");
1405 /* 1 parameter cmd */
baca51fa 1406 fdctrl->data_len = 2;
8977f3c1
FB		 1407 goto enqueue;
1408 case 0x42:
1409 /* READ_TRACK */
1410 FLOPPY_DPRINTF("READ_TRACK command\n");
1411 /* 8 parameters cmd */
baca51fa 1412 fdctrl->data_len = 9;
8977f3c1
FB		 1413 goto enqueue;
1414 case 0x4A:
1415 /* READ_ID */
1416 FLOPPY_DPRINTF("READ_ID command\n");
1417 /* 1 parameter cmd */
baca51fa 1418 fdctrl->data_len = 2;
8977f3c1
FB		 1419 goto enqueue;
1420 case 0x4C:
1421 /* RESTORE */
1422 FLOPPY_DPRINTF("RESTORE command\n");
1423 /* 17 parameters cmd */
baca51fa 1424 fdctrl->data_len = 18;
8977f3c1
FB		 1425 goto enqueue;
1426 case 0x4D:
1427 /* FORMAT_TRACK */
1428 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1429 /* 5 parameters cmd */
baca51fa 1430 fdctrl->data_len = 6;
8977f3c1
FB		 1431 goto enqueue;
1432 case 0x8E:
1433 /* DRIVE_SPECIFICATION_COMMAND */
1434 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1435 /* 5 parameters cmd */
baca51fa 1436 fdctrl->data_len = 6;
8977f3c1
FB		 1437 goto enqueue;
1438 case 0x8F:
1439 /* RELATIVE_SEEK_OUT */
1440 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1441 /* 2 parameters cmd */
baca51fa 1442 fdctrl->data_len = 3;
8977f3c1
FB		 1443 goto enqueue;
1444 case 0x94:
1445 /* LOCK */
1446 FLOPPY_DPRINTF("LOCK command\n");
1447 /* No parameters cmd */
baca51fa
FB		 1448 fdctrl->lock = 1;
1449 fdctrl->fifo[0] = 0x10;
1450 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1451 return;
1452 case 0xCD:
1453 /* FORMAT_AND_WRITE */
1454 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1455 /* 10 parameters cmd */
baca51fa 1456 fdctrl->data_len = 11;
8977f3c1
FB		 1457 goto enqueue;
1458 case 0xCF:
1459 /* RELATIVE_SEEK_IN */
1460 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1461 /* 2 parameters cmd */
baca51fa 1462 fdctrl->data_len = 3;
8977f3c1
FB		 1463 goto enqueue;
1464 default:
1465 /* Unknown command */
1466 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
baca51fa 1467 fdctrl_unimplemented(fdctrl);
8977f3c1
FB		 1468 return;
1469 }
1470 }
1471enqueue:
baca51fa
FB		 1472 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1473 fdctrl->fifo[fdctrl->data_pos] = value;
1474 if (++fdctrl->data_pos == fdctrl->data_len) {
8977f3c1
FB		 1475 /* We now have all parameters
1476 * and will be able to treat the command
1477 */
baca51fa
FB		 1478 if (fdctrl->data_state & FD_STATE_FORMAT) {
1479 fdctrl_format_sector(fdctrl);
1480 return;
1481 }
1482 switch (fdctrl->fifo[0] & 0x1F) {
8977f3c1
FB		 1483 case 0x06:
1484 {
1485 /* READ variants */
1486 FLOPPY_DPRINTF("treat READ command\n");
baca51fa 1487 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
8977f3c1
FB		 1488 return;
1489 }
1490 case 0x0C:
1491 /* READ_DELETED variants */
1492// FLOPPY_DPRINTF("treat READ_DELETED command\n");
1493 FLOPPY_ERROR("treat READ_DELETED command\n");
baca51fa 1494 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
8977f3c1
FB		 1495 return;
1496 case 0x16:
1497 /* VERIFY variants */
1498// FLOPPY_DPRINTF("treat VERIFY command\n");
1499 FLOPPY_ERROR("treat VERIFY command\n");
baca51fa 1500 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
8977f3c1
FB		 1501 return;
1502 case 0x10:
1503 /* SCAN_EQUAL variants */
1504// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1505 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
baca51fa 1506 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
8977f3c1
FB		 1507 return;
1508 case 0x19:
1509 /* SCAN_LOW_OR_EQUAL variants */
1510// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1511 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
baca51fa 1512 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
8977f3c1
FB		 1513 return;
1514 case 0x1D:
1515 /* SCAN_HIGH_OR_EQUAL variants */
1516// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1517 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
baca51fa 1518 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
8977f3c1
FB		 1519 return;
1520 default:
1521 break;
1522 }
baca51fa 1523 switch (fdctrl->fifo[0] & 0x3F) {
8977f3c1
FB		 1524 case 0x05:
1525 /* WRITE variants */
baca51fa
FB		 1526 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1527 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
8977f3c1
FB		 1528 return;
1529 case 0x09:
1530 /* WRITE_DELETED variants */
1531// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1532 FLOPPY_ERROR("treat WRITE_DELETED command\n");
baca51fa 1533 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
8977f3c1
FB		 1534 return;
1535 default:
1536 break;
1537 }
baca51fa 1538 switch (fdctrl->fifo[0]) {
8977f3c1
FB		 1539 case 0x03:
1540 /* SPECIFY */
1541 FLOPPY_DPRINTF("treat SPECIFY command\n");
baca51fa 1542 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
e309de25 1543 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
baca51fa 1544 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
8977f3c1 1545 /* No result back */
baca51fa 1546 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1547 break;
1548 case 0x04:
1549 /* SENSE_DRIVE_STATUS */
1550 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
baca51fa
FB		 1551 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1552 cur_drv = get_cur_drv(fdctrl);
1553 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
8977f3c1 1554 /* 1 Byte status back */
baca51fa 1555 fdctrl->fifo[0] = (cur_drv->ro << 6) |
8977f3c1 1556 (cur_drv->track == 0 ? 0x10 : 0x00) |
890fa6be
FB		 1557 (cur_drv->head << 2) |
1558 fdctrl->cur_drv |
1559 0x28;
baca51fa 1560 fdctrl_set_fifo(fdctrl, 1, 0);
8977f3c1
FB		 1561 break;
1562 case 0x07:
1563 /* RECALIBRATE */
1564 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
baca51fa
FB		 1565 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1566 cur_drv = get_cur_drv(fdctrl);
8977f3c1 1567 fd_recalibrate(cur_drv);
baca51fa 1568 fdctrl_reset_fifo(fdctrl);
8977f3c1 1569 /* Raise Interrupt */
baca51fa 1570 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1571 break;
1572 case 0x0F:
1573 /* SEEK */
1574 FLOPPY_DPRINTF("treat SEEK command\n");
baca51fa
FB		 1575 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1576 cur_drv = get_cur_drv(fdctrl);
1577 fd_start(cur_drv);
1578 if (fdctrl->fifo[2] <= cur_drv->track)
8977f3c1
FB		 1579 cur_drv->dir = 1;
1580 else
1581 cur_drv->dir = 0;
baca51fa
FB		 1582 fdctrl_reset_fifo(fdctrl);
1583 if (fdctrl->fifo[2] > cur_drv->max_track) {
1584 fdctrl_raise_irq(fdctrl, 0x60);
8977f3c1 1585 } else {
baca51fa 1586 cur_drv->track = fdctrl->fifo[2];
8977f3c1 1587 /* Raise Interrupt */
baca51fa 1588 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1589 }
1590 break;
1591 case 0x12:
1592 /* PERPENDICULAR_MODE */
1593 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
baca51fa
FB		 1594 if (fdctrl->fifo[1] & 0x80)
1595 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
8977f3c1 1596 /* No result back */
baca51fa 1597 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1598 break;
1599 case 0x13:
1600 /* CONFIGURE */
1601 FLOPPY_DPRINTF("treat CONFIGURE command\n");
baca51fa
FB		 1602 fdctrl->config = fdctrl->fifo[2];
1603 fdctrl->precomp_trk = fdctrl->fifo[3];
8977f3c1 1604 /* No result back */
baca51fa 1605 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1606 break;
1607 case 0x17:
1608 /* POWERDOWN_MODE */
1609 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
baca51fa
FB		 1610 fdctrl->pwrd = fdctrl->fifo[1];
1611 fdctrl->fifo[0] = fdctrl->fifo[1];
1612 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1613 break;
1614 case 0x33:
1615 /* OPTION */
1616 FLOPPY_DPRINTF("treat OPTION command\n");
1617 /* No result back */
baca51fa 1618 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1619 break;
1620 case 0x42:
1621 /* READ_TRACK */
1622// FLOPPY_DPRINTF("treat READ_TRACK command\n");
1623 FLOPPY_ERROR("treat READ_TRACK command\n");
baca51fa 1624 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
8977f3c1
FB		 1625 break;
1626 case 0x4A:
1627 /* READ_ID */
baca51fa 1628 FLOPPY_DPRINTF("treat READ_ID command\n");
ed5fd2cc 1629 /* XXX: should set main status register to busy */
890fa6be 1630 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
ed5fd2cc
FB		 1631 qemu_mod_timer(fdctrl->result_timer,
1632 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
8977f3c1
FB		 1633 break;
1634 case 0x4C:
1635 /* RESTORE */
1636 FLOPPY_DPRINTF("treat RESTORE command\n");
1637 /* Drives position */
baca51fa
FB		 1638 drv0(fdctrl)->track = fdctrl->fifo[3];
1639 drv1(fdctrl)->track = fdctrl->fifo[4];
8977f3c1 1640 /* timers */
baca51fa
FB		 1641 fdctrl->timer0 = fdctrl->fifo[7];
1642 fdctrl->timer1 = fdctrl->fifo[8];
1643 cur_drv->last_sect = fdctrl->fifo[9];
1644 fdctrl->lock = fdctrl->fifo[10] >> 7;
1645 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1646 fdctrl->config = fdctrl->fifo[11];
1647 fdctrl->precomp_trk = fdctrl->fifo[12];
1648 fdctrl->pwrd = fdctrl->fifo[13];
1649 fdctrl_reset_fifo(fdctrl);
8977f3c1
FB		 1650 break;
1651 case 0x4D:
1652 /* FORMAT_TRACK */
baca51fa
FB		 1653 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1654 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1655 cur_drv = get_cur_drv(fdctrl);
1656 fdctrl->data_state |= FD_STATE_FORMAT;
1657 if (fdctrl->fifo[0] & 0x80)
1658 fdctrl->data_state |= FD_STATE_MULTI;
1659 else
1660 fdctrl->data_state &= ~FD_STATE_MULTI;
1661 fdctrl->data_state &= ~FD_STATE_SEEK;
1662 cur_drv->bps =
1663 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1664#if 0
1665 cur_drv->last_sect =
1666 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1667 fdctrl->fifo[3] / 2;
1668#else
1669 cur_drv->last_sect = fdctrl->fifo[3];
1670#endif
1671 /* Bochs BIOS is buggy and don't send format informations
1672 * for each sector. So, pretend all's done right now...
1673 */
1674 fdctrl->data_state &= ~FD_STATE_FORMAT;
1675 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
8977f3c1
FB		 1676 break;
1677 case 0x8E:
1678 /* DRIVE_SPECIFICATION_COMMAND */
1679 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
baca51fa 1680 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
8977f3c1 1681 /* Command parameters done */
baca51fa
FB		 1682 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1683 fdctrl->fifo[0] = fdctrl->fifo[1];
1684 fdctrl->fifo[2] = 0;
1685 fdctrl->fifo[3] = 0;
1686 fdctrl_set_fifo(fdctrl, 4, 1);
8977f3c1 1687 } else {
baca51fa 1688 fdctrl_reset_fifo(fdctrl);
8977f3c1 1689 }
baca51fa 1690 } else if (fdctrl->data_len > 7) {
8977f3c1 1691 /* ERROR */
baca51fa
FB		 1692 fdctrl->fifo[0] = 0x80 |
1693 (cur_drv->head << 2) | fdctrl->cur_drv;
1694 fdctrl_set_fifo(fdctrl, 1, 1);
8977f3c1
FB		 1695 }
1696 break;
1697 case 0x8F:
1698 /* RELATIVE_SEEK_OUT */
1699 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
baca51fa
FB		 1700 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1701 cur_drv = get_cur_drv(fdctrl);
1702 fd_start(cur_drv);
8977f3c1 1703 cur_drv->dir = 0;
baca51fa
FB		 1704 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1705 cur_drv->track = cur_drv->max_track - 1;
1706 } else {
1707 cur_drv->track += fdctrl->fifo[2];
8977f3c1 1708 }
baca51fa
FB		 1709 fdctrl_reset_fifo(fdctrl);
1710 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1711 break;
1712 case 0xCD:
1713 /* FORMAT_AND_WRITE */
1714// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1715 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
baca51fa 1716 fdctrl_unimplemented(fdctrl);
8977f3c1
FB		 1717 break;
1718 case 0xCF:
1719 /* RELATIVE_SEEK_IN */
1720 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
baca51fa
FB		 1721 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1722 cur_drv = get_cur_drv(fdctrl);
1723 fd_start(cur_drv);
8977f3c1 1724 cur_drv->dir = 1;
baca51fa
FB		 1725 if (fdctrl->fifo[2] > cur_drv->track) {
1726 cur_drv->track = 0;
1727 } else {
1728 cur_drv->track -= fdctrl->fifo[2];
8977f3c1 1729 }
baca51fa
FB		 1730 fdctrl_reset_fifo(fdctrl);
1731 /* Raise Interrupt */
1732 fdctrl_raise_irq(fdctrl, 0x20);
8977f3c1
FB		 1733 break;
1734 }
1735 }
1736}
ed5fd2cc
FB		 1737
1738static void fdctrl_result_timer(void *opaque)
1739{
1740 fdctrl_t *fdctrl = opaque;
1741 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1742}
Qemu copy for testing