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Improve readability by moving the continue operation into aseparate function.
[qemu/malc.git] / hw / fdc.c
blob0bb480c262e831f32f14911a7f4ad5c729a0910d
1 /*
2 * QEMU Floppy disk emulator (Intel 82078)
3 *
4 * Copyright (c) 2003, 2007 Jocelyn Mayer
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 /*
25 * The controller is used in Sun4m systems in a slightly different
26 * way. There are changes in DOR register and DMA is not available.
27 */
28 #include "hw.h"
29 #include "fdc.h"
30 #include "block.h"
31 #include "qemu-timer.h"
32 #include "isa.h"
33
34 /********************************************************/
35 /* debug Floppy devices */
36 //#define DEBUG_FLOPPY
37
38 #ifdef DEBUG_FLOPPY
39 #define FLOPPY_DPRINTF(fmt, args...) \
40 do { printf("FLOPPY: " fmt , ##args); } while (0)
41 #else
42 #define FLOPPY_DPRINTF(fmt, args...)
43 #endif
44
45 #define FLOPPY_ERROR(fmt, args...) \
46 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
47
48 /********************************************************/
49 /* Floppy drive emulation */
50
51 /* Will always be a fixed parameter for us */
52 #define FD_SECTOR_LEN 512
53 #define FD_SECTOR_SC 2 /* Sector size code */
54
55 /* Floppy disk drive emulation */
56 typedef enum fdisk_type_t {
57 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
58 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
59 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
60 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
61 FDRIVE_DISK_NONE = 0x05, /* No disk */
62 } fdisk_type_t;
63
64 typedef enum fdrive_type_t {
65 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
66 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
67 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
68 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
69 } fdrive_type_t;
70
71 typedef enum fdrive_flags_t {
72 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
73 } fdrive_flags_t;
74
75 typedef enum fdisk_flags_t {
76 FDISK_DBL_SIDES = 0x01,
77 } fdisk_flags_t;
78
79 typedef struct fdrive_t {
80 BlockDriverState *bs;
81 /* Drive status */
82 fdrive_type_t drive;
83 fdrive_flags_t drflags;
84 uint8_t perpendicular; /* 2.88 MB access mode */
85 /* Position */
86 uint8_t head;
87 uint8_t track;
88 uint8_t sect;
89 /* Last operation status */
90 uint8_t dir; /* Direction */
91 uint8_t rw; /* Read/write */
92 /* Media */
93 fdisk_flags_t flags;
94 uint8_t last_sect; /* Nb sector per track */
95 uint8_t max_track; /* Nb of tracks */
96 uint16_t bps; /* Bytes per sector */
97 uint8_t ro; /* Is read-only */
98 } fdrive_t;
99
100 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
101 {
102 /* Drive */
103 drv->bs = bs;
104 drv->drive = FDRIVE_DRV_NONE;
105 drv->drflags = 0;
106 drv->perpendicular = 0;
107 /* Disk */
108 drv->last_sect = 0;
109 drv->max_track = 0;
110 }
111
112 static int _fd_sector (uint8_t head, uint8_t track,
113 uint8_t sect, uint8_t last_sect)
114 {
115 return (((track * 2) + head) * last_sect) + sect - 1;
116 }
117
118 /* Returns current position, in sectors, for given drive */
119 static int fd_sector (fdrive_t *drv)
120 {
121 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
122 }
123
124 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
125 int enable_seek)
126 {
127 uint32_t sector;
128 int ret;
129
130 if (track > drv->max_track ||
131 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
132 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
133 head, track, sect, 1,
134 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
135 drv->max_track, drv->last_sect);
136 return 2;
137 }
138 if (sect > drv->last_sect) {
139 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
140 head, track, sect, 1,
141 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
142 drv->max_track, drv->last_sect);
143 return 3;
144 }
145 sector = _fd_sector(head, track, sect, drv->last_sect);
146 ret = 0;
147 if (sector != fd_sector(drv)) {
148 #if 0
149 if (!enable_seek) {
150 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
151 head, track, sect, 1, drv->max_track, drv->last_sect);
152 return 4;
153 }
154 #endif
155 drv->head = head;
156 if (drv->track != track)
157 ret = 1;
158 drv->track = track;
159 drv->sect = sect;
160 }
161
162 return ret;
163 }
164
165 /* Set drive back to track 0 */
166 static void fd_recalibrate (fdrive_t *drv)
167 {
168 FLOPPY_DPRINTF("recalibrate\n");
169 drv->head = 0;
170 drv->track = 0;
171 drv->sect = 1;
172 drv->dir = 1;
173 drv->rw = 0;
174 }
175
176 /* Recognize floppy formats */
177 typedef struct fd_format_t {
178 fdrive_type_t drive;
179 fdisk_type_t disk;
180 uint8_t last_sect;
181 uint8_t max_track;
182 uint8_t max_head;
183 const char *str;
184 } fd_format_t;
185
186 static const fd_format_t fd_formats[] = {
187 /* First entry is default format */
188 /* 1.44 MB 3"1/2 floppy disks */
189 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
190 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
191 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
192 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
193 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
194 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
195 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
196 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
197 /* 2.88 MB 3"1/2 floppy disks */
198 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
199 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
200 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
201 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
202 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
203 /* 720 kB 3"1/2 floppy disks */
204 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
205 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
206 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
207 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
208 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
209 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
210 /* 1.2 MB 5"1/4 floppy disks */
211 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
212 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
213 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
214 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
215 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
216 /* 720 kB 5"1/4 floppy disks */
217 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
219 /* 360 kB 5"1/4 floppy disks */
220 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
221 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
222 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
223 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
224 /* 320 kB 5"1/4 floppy disks */
225 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
226 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
227 /* 360 kB must match 5"1/4 better than 3"1/2... */
228 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
229 /* end */
230 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
231 };
232
233 /* Revalidate a disk drive after a disk change */
234 static void fd_revalidate (fdrive_t *drv)
235 {
236 const fd_format_t *parse;
237 uint64_t nb_sectors, size;
238 int i, first_match, match;
239 int nb_heads, max_track, last_sect, ro;
240
241 FLOPPY_DPRINTF("revalidate\n");
242 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
243 ro = bdrv_is_read_only(drv->bs);
244 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
245 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
246 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
247 nb_heads - 1, max_track, last_sect);
248 } else {
249 bdrv_get_geometry(drv->bs, &nb_sectors);
250 match = -1;
251 first_match = -1;
252 for (i = 0;; i++) {
253 parse = &fd_formats[i];
254 if (parse->drive == FDRIVE_DRV_NONE)
255 break;
256 if (drv->drive == parse->drive ||
257 drv->drive == FDRIVE_DRV_NONE) {
258 size = (parse->max_head + 1) * parse->max_track *
259 parse->last_sect;
260 if (nb_sectors == size) {
261 match = i;
262 break;
263 }
264 if (first_match == -1)
265 first_match = i;
266 }
267 }
268 if (match == -1) {
269 if (first_match == -1)
270 match = 1;
271 else
272 match = first_match;
273 parse = &fd_formats[match];
274 }
275 nb_heads = parse->max_head + 1;
276 max_track = parse->max_track;
277 last_sect = parse->last_sect;
278 drv->drive = parse->drive;
279 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
280 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
281 }
282 if (nb_heads == 1) {
283 drv->flags &= ~FDISK_DBL_SIDES;
284 } else {
285 drv->flags |= FDISK_DBL_SIDES;
286 }
287 drv->max_track = max_track;
288 drv->last_sect = last_sect;
289 drv->ro = ro;
290 } else {
291 FLOPPY_DPRINTF("No disk in drive\n");
292 drv->last_sect = 0;
293 drv->max_track = 0;
294 drv->flags &= ~FDISK_DBL_SIDES;
295 }
296 }
297
298 /* Motor control */
299 static void fd_start (fdrive_t *drv)
300 {
301 drv->drflags |= FDRIVE_MOTOR_ON;
302 }
303
304 static void fd_stop (fdrive_t *drv)
305 {
306 drv->drflags &= ~FDRIVE_MOTOR_ON;
307 }
308
309 /* Re-initialise a drives (motor off, repositioned) */
310 static void fd_reset (fdrive_t *drv)
311 {
312 fd_stop(drv);
313 fd_recalibrate(drv);
314 }
315
316 /********************************************************/
317 /* Intel 82078 floppy disk controller emulation */
318
319 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
320 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
321 static int fdctrl_transfer_handler (void *opaque, int nchan,
322 int dma_pos, int dma_len);
323 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
324 static void fdctrl_result_timer(void *opaque);
325
326 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
327 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
328 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
329 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
330 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
331 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
332 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
333 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
334 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
335 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
336
337 enum {
338 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
339 FD_CTRL_RESET = 0x02,
340 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
341 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
342 FD_CTRL_INTR = 0x10,
343 };
344
345 enum {
346 FD_DIR_WRITE = 0,
347 FD_DIR_READ = 1,
348 FD_DIR_SCANE = 2,
349 FD_DIR_SCANL = 3,
350 FD_DIR_SCANH = 4,
351 };
352
353 enum {
354 FD_STATE_CMD = 0x00,
355 FD_STATE_STATUS = 0x01,
356 FD_STATE_DATA = 0x02,
357 FD_STATE_STATE = 0x03,
358 FD_STATE_MULTI = 0x10,
359 FD_STATE_SEEK = 0x20,
360 FD_STATE_FORMAT = 0x40,
361 };
362
363 enum {
364 FD_REG_0 = 0x00,
365 FD_REG_STATUSB = 0x01,
366 FD_REG_DOR = 0x02,
367 FD_REG_TDR = 0x03,
368 FD_REG_MSR = 0x04,
369 FD_REG_DSR = 0x04,
370 FD_REG_FIFO = 0x05,
371 FD_REG_DIR = 0x07,
372 };
373
374 enum {
375 FD_CMD_SPECIFY = 0x03,
376 FD_CMD_SENSE_DRIVE_STATUS = 0x04,
377 FD_CMD_RECALIBRATE = 0x07,
378 FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
379 FD_CMD_DUMPREG = 0x0e,
380 FD_CMD_SEEK = 0x0f,
381 FD_CMD_VERSION = 0x10,
382 FD_CMD_PERPENDICULAR_MODE = 0x12,
383 FD_CMD_CONFIGURE = 0x13,
384 FD_CMD_UNLOCK = 0x14,
385 FD_CMD_POWERDOWN_MODE = 0x17,
386 FD_CMD_PART_ID = 0x18,
387 FD_CMD_SAVE = 0x2c,
388 FD_CMD_OPTION = 0x33,
389 FD_CMD_READ_TRACK = 0x42,
390 FD_CMD_WRITE = 0x45,
391 FD_CMD_READ = 0x46,
392 FD_CMD_WRITE_DELETED = 0x49,
393 FD_CMD_READ_ID = 0x4a,
394 FD_CMD_READ_DELETED = 0x4c,
395 FD_CMD_RESTORE = 0x4c,
396 FD_CMD_FORMAT_TRACK = 0x4d,
397 FD_CMD_SCAN_EQUAL = 0x50,
398 FD_CMD_VERIFY = 0x56,
399 FD_CMD_SCAN_LOW_OR_EQUAL = 0x59,
400 FD_CMD_SCAN_HIGH_OR_EQUAL = 0x5d,
401 FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
402 FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
403 FD_CMD_LOCK = 0x94,
404 FD_CMD_FORMAT_AND_WRITE = 0xcd,
405 FD_CMD_RELATIVE_SEEK_IN = 0xcf,
406 };
407
408 enum {
409 FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
410 FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
411 FD_CONFIG_POLL = 0x10, /* Poll enabled */
412 FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
413 FD_CONFIG_EIS = 0x40, /* No implied seeks */
414 };
415
416 enum {
417 FD_SR0_EQPMT = 0x10,
418 FD_SR0_SEEK = 0x20,
419 FD_SR0_ABNTERM = 0x40,
420 FD_SR0_INVCMD = 0x80,
421 FD_SR0_RDYCHG = 0xc0,
422 };
423
424 enum {
425 FD_DOR_SELMASK = 0x01,
426 FD_DOR_nRESET = 0x04,
427 FD_DOR_DMAEN = 0x08,
428 FD_DOR_MOTEN0 = 0x10,
429 FD_DOR_MOTEN1 = 0x20,
430 FD_DOR_MOTEN2 = 0x40,
431 FD_DOR_MOTEN3 = 0x80,
432 };
433
434 enum {
435 FD_TDR_BOOTSEL = 0x0c,
436 };
437
438 enum {
439 FD_DSR_DRATEMASK= 0x03,
440 FD_DSR_PWRDOWN = 0x40,
441 FD_DSR_SWRESET = 0x80,
442 };
443
444 enum {
445 FD_MSR_DRV0BUSY = 0x01,
446 FD_MSR_DRV1BUSY = 0x02,
447 FD_MSR_DRV2BUSY = 0x04,
448 FD_MSR_DRV3BUSY = 0x08,
449 FD_MSR_CMDBUSY = 0x10,
450 FD_MSR_NONDMA = 0x20,
451 FD_MSR_DIO = 0x40,
452 FD_MSR_RQM = 0x80,
453 };
454
455 enum {
456 FD_DIR_DSKCHG = 0x80,
457 };
458
459 #define FD_STATE(state) ((state) & FD_STATE_STATE)
460 #define FD_SET_STATE(state, new_state) \
461 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
462 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
463 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
464 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
465
466 struct fdctrl_t {
467 fdctrl_t *fdctrl;
468 /* Controller's identification */
469 uint8_t version;
470 /* HW */
471 qemu_irq irq;
472 int dma_chann;
473 target_phys_addr_t io_base;
474 /* Controller state */
475 QEMUTimer *result_timer;
476 uint8_t state;
477 uint8_t dma_en;
478 uint8_t cur_drv;
479 uint8_t bootsel;
480 /* Command FIFO */
481 uint8_t *fifo;
482 uint32_t data_pos;
483 uint32_t data_len;
484 uint8_t data_state;
485 uint8_t data_dir;
486 uint8_t int_status;
487 uint8_t eot; /* last wanted sector */
488 /* States kept only to be returned back */
489 /* Timers state */
490 uint8_t timer0;
491 uint8_t timer1;
492 /* precompensation */
493 uint8_t precomp_trk;
494 uint8_t config;
495 uint8_t lock;
496 /* Power down config (also with status regB access mode */
497 uint8_t pwrd;
498 /* Sun4m quirks? */
499 int sun4m;
500 /* Floppy drives */
501 fdrive_t drives[2];
502 };
503
504 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
505 {
506 fdctrl_t *fdctrl = opaque;
507 uint32_t retval;
508
509 switch (reg & 0x07) {
510 case FD_REG_0:
511 if (fdctrl->sun4m) {
512 // Identify to Linux as S82078B
513 retval = fdctrl_read_statusB(fdctrl);
514 } else {
515 retval = (uint32_t)(-1);
516 }
517 break;
518 case FD_REG_STATUSB:
519 retval = fdctrl_read_statusB(fdctrl);
520 break;
521 case FD_REG_DOR:
522 retval = fdctrl_read_dor(fdctrl);
523 break;
524 case FD_REG_TDR:
525 retval = fdctrl_read_tape(fdctrl);
526 break;
527 case FD_REG_MSR:
528 retval = fdctrl_read_main_status(fdctrl);
529 break;
530 case FD_REG_FIFO:
531 retval = fdctrl_read_data(fdctrl);
532 break;
533 case FD_REG_DIR:
534 retval = fdctrl_read_dir(fdctrl);
535 break;
536 default:
537 retval = (uint32_t)(-1);
538 break;
539 }
540 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
541
542 return retval;
543 }
544
545 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
546 {
547 fdctrl_t *fdctrl = opaque;
548
549 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
550
551 switch (reg & 0x07) {
552 case FD_REG_DOR:
553 fdctrl_write_dor(fdctrl, value);
554 break;
555 case FD_REG_TDR:
556 fdctrl_write_tape(fdctrl, value);
557 break;
558 case FD_REG_DSR:
559 fdctrl_write_rate(fdctrl, value);
560 break;
561 case FD_REG_FIFO:
562 fdctrl_write_data(fdctrl, value);
563 break;
564 default:
565 break;
566 }
567 }
568
569 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
570 {
571 return fdctrl_read(opaque, (uint32_t)reg);
572 }
573
574 static void fdctrl_write_mem (void *opaque,
575 target_phys_addr_t reg, uint32_t value)
576 {
577 fdctrl_write(opaque, (uint32_t)reg, value);
578 }
579
580 static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
581 fdctrl_read_mem,
582 fdctrl_read_mem,
583 fdctrl_read_mem,
584 };
585
586 static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
587 fdctrl_write_mem,
588 fdctrl_write_mem,
589 fdctrl_write_mem,
590 };
591
592 static CPUReadMemoryFunc *fdctrl_mem_read_strict[3] = {
593 fdctrl_read_mem,
594 NULL,
595 NULL,
596 };
597
598 static CPUWriteMemoryFunc *fdctrl_mem_write_strict[3] = {
599 fdctrl_write_mem,
600 NULL,
601 NULL,
602 };
603
604 static void fd_save (QEMUFile *f, fdrive_t *fd)
605 {
606 uint8_t tmp;
607
608 tmp = fd->drflags;
609 qemu_put_8s(f, &tmp);
610 qemu_put_8s(f, &fd->head);
611 qemu_put_8s(f, &fd->track);
612 qemu_put_8s(f, &fd->sect);
613 qemu_put_8s(f, &fd->dir);
614 qemu_put_8s(f, &fd->rw);
615 }
616
617 static void fdc_save (QEMUFile *f, void *opaque)
618 {
619 fdctrl_t *s = opaque;
620
621 qemu_put_8s(f, &s->state);
622 qemu_put_8s(f, &s->dma_en);
623 qemu_put_8s(f, &s->cur_drv);
624 qemu_put_8s(f, &s->bootsel);
625 qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN);
626 qemu_put_be32s(f, &s->data_pos);
627 qemu_put_be32s(f, &s->data_len);
628 qemu_put_8s(f, &s->data_state);
629 qemu_put_8s(f, &s->data_dir);
630 qemu_put_8s(f, &s->int_status);
631 qemu_put_8s(f, &s->eot);
632 qemu_put_8s(f, &s->timer0);
633 qemu_put_8s(f, &s->timer1);
634 qemu_put_8s(f, &s->precomp_trk);
635 qemu_put_8s(f, &s->config);
636 qemu_put_8s(f, &s->lock);
637 qemu_put_8s(f, &s->pwrd);
638 fd_save(f, &s->drives[0]);
639 fd_save(f, &s->drives[1]);
640 }
641
642 static int fd_load (QEMUFile *f, fdrive_t *fd)
643 {
644 uint8_t tmp;
645
646 qemu_get_8s(f, &tmp);
647 fd->drflags = tmp;
648 qemu_get_8s(f, &fd->head);
649 qemu_get_8s(f, &fd->track);
650 qemu_get_8s(f, &fd->sect);
651 qemu_get_8s(f, &fd->dir);
652 qemu_get_8s(f, &fd->rw);
653
654 return 0;
655 }
656
657 static int fdc_load (QEMUFile *f, void *opaque, int version_id)
658 {
659 fdctrl_t *s = opaque;
660 int ret;
661
662 if (version_id != 1)
663 return -EINVAL;
664
665 qemu_get_8s(f, &s->state);
666 qemu_get_8s(f, &s->dma_en);
667 qemu_get_8s(f, &s->cur_drv);
668 qemu_get_8s(f, &s->bootsel);
669 qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN);
670 qemu_get_be32s(f, &s->data_pos);
671 qemu_get_be32s(f, &s->data_len);
672 qemu_get_8s(f, &s->data_state);
673 qemu_get_8s(f, &s->data_dir);
674 qemu_get_8s(f, &s->int_status);
675 qemu_get_8s(f, &s->eot);
676 qemu_get_8s(f, &s->timer0);
677 qemu_get_8s(f, &s->timer1);
678 qemu_get_8s(f, &s->precomp_trk);
679 qemu_get_8s(f, &s->config);
680 qemu_get_8s(f, &s->lock);
681 qemu_get_8s(f, &s->pwrd);
682
683 ret = fd_load(f, &s->drives[0]);
684 if (ret == 0)
685 ret = fd_load(f, &s->drives[1]);
686
687 return ret;
688 }
689
690 static void fdctrl_external_reset(void *opaque)
691 {
692 fdctrl_t *s = opaque;
693
694 fdctrl_reset(s, 0);
695 }
696
697 static fdctrl_t *fdctrl_init_common (qemu_irq irq, int dma_chann,
698 target_phys_addr_t io_base,
699 BlockDriverState **fds)
700 {
701 fdctrl_t *fdctrl;
702 int i;
703
704 FLOPPY_DPRINTF("init controller\n");
705 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
706 if (!fdctrl)
707 return NULL;
708 fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN);
709 if (fdctrl->fifo == NULL) {
710 qemu_free(fdctrl);
711 return NULL;
712 }
713 fdctrl->result_timer = qemu_new_timer(vm_clock,
714 fdctrl_result_timer, fdctrl);
715
716 fdctrl->version = 0x90; /* Intel 82078 controller */
717 fdctrl->irq = irq;
718 fdctrl->dma_chann = dma_chann;
719 fdctrl->io_base = io_base;
720 fdctrl->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
721 if (fdctrl->dma_chann != -1) {
722 fdctrl->dma_en = 1;
723 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
724 } else {
725 fdctrl->dma_en = 0;
726 }
727 for (i = 0; i < MAX_FD; i++) {
728 fd_init(&fdctrl->drives[i], fds[i]);
729 }
730 fdctrl_reset(fdctrl, 0);
731 fdctrl->state = FD_CTRL_ACTIVE;
732 register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl);
733 qemu_register_reset(fdctrl_external_reset, fdctrl);
734 for (i = 0; i < MAX_FD; i++) {
735 fd_revalidate(&fdctrl->drives[i]);
736 }
737
738 return fdctrl;
739 }
740
741 fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
742 target_phys_addr_t io_base,
743 BlockDriverState **fds)
744 {
745 fdctrl_t *fdctrl;
746 int io_mem;
747
748 fdctrl = fdctrl_init_common(irq, dma_chann, io_base, fds);
749
750 fdctrl->sun4m = 0;
751 if (mem_mapped) {
752 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
753 fdctrl);
754 cpu_register_physical_memory(io_base, 0x08, io_mem);
755 } else {
756 register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read,
757 fdctrl);
758 register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read,
759 fdctrl);
760 register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write,
761 fdctrl);
762 register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write,
763 fdctrl);
764 }
765
766 return fdctrl;
767 }
768
769 fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base,
770 BlockDriverState **fds)
771 {
772 fdctrl_t *fdctrl;
773 int io_mem;
774
775 fdctrl = fdctrl_init_common(irq, 0, io_base, fds);
776 fdctrl->sun4m = 1;
777 io_mem = cpu_register_io_memory(0, fdctrl_mem_read_strict,
778 fdctrl_mem_write_strict,
779 fdctrl);
780 cpu_register_physical_memory(io_base, 0x08, io_mem);
781
782 return fdctrl;
783 }
784
785 /* XXX: may change if moved to bdrv */
786 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
787 {
788 return fdctrl->drives[drive_num].drive;
789 }
790
791 /* Change IRQ state */
792 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
793 {
794 FLOPPY_DPRINTF("Reset interrupt\n");
795 qemu_set_irq(fdctrl->irq, 0);
796 fdctrl->state &= ~FD_CTRL_INTR;
797 }
798
799 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
800 {
801 // Sparc mutation
802 if (fdctrl->sun4m && !fdctrl->dma_en) {
803 fdctrl->state &= ~FD_CTRL_BUSY;
804 fdctrl->int_status = status;
805 return;
806 }
807 if (~(fdctrl->state & FD_CTRL_INTR)) {
808 qemu_set_irq(fdctrl->irq, 1);
809 fdctrl->state |= FD_CTRL_INTR;
810 }
811 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
812 fdctrl->int_status = status;
813 }
814
815 /* Reset controller */
816 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
817 {
818 int i;
819
820 FLOPPY_DPRINTF("reset controller\n");
821 fdctrl_reset_irq(fdctrl);
822 /* Initialise controller */
823 fdctrl->cur_drv = 0;
824 /* FIFO state */
825 fdctrl->data_pos = 0;
826 fdctrl->data_len = 0;
827 fdctrl->data_state = FD_STATE_CMD;
828 fdctrl->data_dir = FD_DIR_WRITE;
829 for (i = 0; i < MAX_FD; i++)
830 fd_reset(&fdctrl->drives[i]);
831 fdctrl_reset_fifo(fdctrl);
832 if (do_irq)
833 fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
834 }
835
836 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
837 {
838 return &fdctrl->drives[fdctrl->bootsel];
839 }
840
841 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
842 {
843 return &fdctrl->drives[1 - fdctrl->bootsel];
844 }
845
846 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
847 {
848 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
849 }
850
851 /* Status B register : 0x01 (read-only) */
852 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
853 {
854 FLOPPY_DPRINTF("status register: 0x00\n");
855 return 0;
856 }
857
858 /* Digital output register : 0x02 */
859 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
860 {
861 uint32_t retval = 0;
862
863 /* Drive motors state indicators */
864 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
865 retval |= FD_DOR_MOTEN0;
866 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
867 retval |= FD_DOR_MOTEN1;
868 /* DMA enable */
869 if (fdctrl->dma_en)
870 retval |= FD_DOR_DMAEN;
871 /* Reset indicator */
872 if (!(fdctrl->state & FD_CTRL_RESET))
873 retval |= FD_DOR_nRESET;
874 /* Selected drive */
875 retval |= fdctrl->cur_drv;
876 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
877
878 return retval;
879 }
880
881 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
882 {
883 /* Reset mode */
884 if (fdctrl->state & FD_CTRL_RESET) {
885 if (!(value & FD_DOR_nRESET)) {
886 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
887 return;
888 }
889 }
890 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
891 /* Drive motors state indicators */
892 if (value & FD_DOR_MOTEN1)
893 fd_start(drv1(fdctrl));
894 else
895 fd_stop(drv1(fdctrl));
896 if (value & FD_DOR_MOTEN0)
897 fd_start(drv0(fdctrl));
898 else
899 fd_stop(drv0(fdctrl));
900 /* DMA enable */
901 #if 0
902 if (fdctrl->dma_chann != -1)
903 fdctrl->dma_en = value & FD_DOR_DMAEN ? 1 : 0;
904 #endif
905 /* Reset */
906 if (!(value & FD_DOR_nRESET)) {
907 if (!(fdctrl->state & FD_CTRL_RESET)) {
908 FLOPPY_DPRINTF("controller enter RESET state\n");
909 fdctrl->state |= FD_CTRL_RESET;
910 }
911 } else {
912 if (fdctrl->state & FD_CTRL_RESET) {
913 FLOPPY_DPRINTF("controller out of RESET state\n");
914 fdctrl_reset(fdctrl, 1);
915 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
916 }
917 }
918 /* Selected drive */
919 fdctrl->cur_drv = value & FD_DOR_SELMASK;
920 }
921
922 /* Tape drive register : 0x03 */
923 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
924 {
925 uint32_t retval = 0;
926
927 /* Disk boot selection indicator */
928 retval |= fdctrl->bootsel << 2;
929 /* Tape indicators: never allowed */
930 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
931
932 return retval;
933 }
934
935 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
936 {
937 /* Reset mode */
938 if (fdctrl->state & FD_CTRL_RESET) {
939 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
940 return;
941 }
942 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
943 /* Disk boot selection indicator */
944 fdctrl->bootsel = (value & FD_TDR_BOOTSEL) >> 2;
945 /* Tape indicators: never allow */
946 }
947
948 /* Main status register : 0x04 (read) */
949 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
950 {
951 uint32_t retval = 0;
952
953 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
954 if (!(fdctrl->state & FD_CTRL_BUSY)) {
955 /* Data transfer allowed */
956 retval |= FD_MSR_RQM;
957 /* Data transfer direction indicator */
958 if (fdctrl->data_dir == FD_DIR_READ)
959 retval |= FD_MSR_DIO;
960 }
961 /* Should handle FD_MSR_NONDMA for SPECIFY command */
962 /* Command busy indicator */
963 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
964 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
965 retval |= FD_MSR_CMDBUSY;
966 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
967
968 return retval;
969 }
970
971 /* Data select rate register : 0x04 (write) */
972 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
973 {
974 /* Reset mode */
975 if (fdctrl->state & FD_CTRL_RESET) {
976 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
977 return;
978 }
979 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
980 /* Reset: autoclear */
981 if (value & FD_DSR_SWRESET) {
982 fdctrl->state |= FD_CTRL_RESET;
983 fdctrl_reset(fdctrl, 1);
984 fdctrl->state &= ~FD_CTRL_RESET;
985 }
986 if (value & FD_DSR_PWRDOWN) {
987 fdctrl->state |= FD_CTRL_SLEEP;
988 fdctrl_reset(fdctrl, 1);
989 }
990 }
991
992 static int fdctrl_media_changed(fdrive_t *drv)
993 {
994 int ret;
995
996 if (!drv->bs)
997 return 0;
998 ret = bdrv_media_changed(drv->bs);
999 if (ret) {
1000 fd_revalidate(drv);
1001 }
1002 return ret;
1003 }
1004
1005 /* Digital input register : 0x07 (read-only) */
1006 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
1007 {
1008 uint32_t retval = 0;
1009
1010 if (fdctrl_media_changed(drv0(fdctrl)) ||
1011 fdctrl_media_changed(drv1(fdctrl)))
1012 retval |= FD_DIR_DSKCHG;
1013 if (retval != 0)
1014 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
1015
1016 return retval;
1017 }
1018
1019 /* FIFO state control */
1020 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
1021 {
1022 fdctrl->data_dir = FD_DIR_WRITE;
1023 fdctrl->data_pos = 0;
1024 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
1025 }
1026
1027 /* Set FIFO status for the host to read */
1028 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
1029 {
1030 fdctrl->data_dir = FD_DIR_READ;
1031 fdctrl->data_len = fifo_len;
1032 fdctrl->data_pos = 0;
1033 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
1034 if (do_irq)
1035 fdctrl_raise_irq(fdctrl, 0x00);
1036 }
1037
1038 /* Set an error: unimplemented/unknown command */
1039 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
1040 {
1041 #if 0
1042 fdrive_t *cur_drv;
1043
1044 cur_drv = get_cur_drv(fdctrl);
1045 fdctrl->fifo[0] = FD_SR0_ABNTERM | FD_SR0_SEEK | (cur_drv->head << 2) | fdctrl->cur_drv;
1046 fdctrl->fifo[1] = 0x00;
1047 fdctrl->fifo[2] = 0x00;
1048 fdctrl_set_fifo(fdctrl, 3, 1);
1049 #else
1050 // fdctrl_reset_fifo(fdctrl);
1051 fdctrl->fifo[0] = FD_SR0_INVCMD;
1052 fdctrl_set_fifo(fdctrl, 1, 0);
1053 #endif
1054 }
1055
1056 /* Callback for transfer end (stop or abort) */
1057 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
1058 uint8_t status1, uint8_t status2)
1059 {
1060 fdrive_t *cur_drv;
1061
1062 cur_drv = get_cur_drv(fdctrl);
1063 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
1064 status0, status1, status2,
1065 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
1066 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
1067 fdctrl->fifo[1] = status1;
1068 fdctrl->fifo[2] = status2;
1069 fdctrl->fifo[3] = cur_drv->track;
1070 fdctrl->fifo[4] = cur_drv->head;
1071 fdctrl->fifo[5] = cur_drv->sect;
1072 fdctrl->fifo[6] = FD_SECTOR_SC;
1073 fdctrl->data_dir = FD_DIR_READ;
1074 if (fdctrl->state & FD_CTRL_BUSY) {
1075 DMA_release_DREQ(fdctrl->dma_chann);
1076 fdctrl->state &= ~FD_CTRL_BUSY;
1077 }
1078 fdctrl_set_fifo(fdctrl, 7, 1);
1079 }
1080
1081 /* Prepare a data transfer (either DMA or FIFO) */
1082 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
1083 {
1084 fdrive_t *cur_drv;
1085 uint8_t kh, kt, ks;
1086 int did_seek;
1087
1088 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1089 cur_drv = get_cur_drv(fdctrl);
1090 kt = fdctrl->fifo[2];
1091 kh = fdctrl->fifo[3];
1092 ks = fdctrl->fifo[4];
1093 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
1094 fdctrl->cur_drv, kh, kt, ks,
1095 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1096 did_seek = 0;
1097 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1098 case 2:
1099 /* sect too big */
1100 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1101 fdctrl->fifo[3] = kt;
1102 fdctrl->fifo[4] = kh;
1103 fdctrl->fifo[5] = ks;
1104 return;
1105 case 3:
1106 /* track too big */
1107 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x80, 0x00);
1108 fdctrl->fifo[3] = kt;
1109 fdctrl->fifo[4] = kh;
1110 fdctrl->fifo[5] = ks;
1111 return;
1112 case 4:
1113 /* No seek enabled */
1114 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1115 fdctrl->fifo[3] = kt;
1116 fdctrl->fifo[4] = kh;
1117 fdctrl->fifo[5] = ks;
1118 return;
1119 case 1:
1120 did_seek = 1;
1121 break;
1122 default:
1123 break;
1124 }
1125 /* Set the FIFO state */
1126 fdctrl->data_dir = direction;
1127 fdctrl->data_pos = 0;
1128 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
1129 if (fdctrl->fifo[0] & 0x80)
1130 fdctrl->data_state |= FD_STATE_MULTI;
1131 else
1132 fdctrl->data_state &= ~FD_STATE_MULTI;
1133 if (did_seek)
1134 fdctrl->data_state |= FD_STATE_SEEK;
1135 else
1136 fdctrl->data_state &= ~FD_STATE_SEEK;
1137 if (fdctrl->fifo[5] == 00) {
1138 fdctrl->data_len = fdctrl->fifo[8];
1139 } else {
1140 int tmp;
1141 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1142 tmp = (cur_drv->last_sect - ks + 1);
1143 if (fdctrl->fifo[0] & 0x80)
1144 tmp += cur_drv->last_sect;
1145 fdctrl->data_len *= tmp;
1146 }
1147 fdctrl->eot = fdctrl->fifo[6];
1148 if (fdctrl->dma_en) {
1149 int dma_mode;
1150 /* DMA transfer are enabled. Check if DMA channel is well programmed */
1151 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1152 dma_mode = (dma_mode >> 2) & 3;
1153 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1154 dma_mode, direction,
1155 (128 << fdctrl->fifo[5]) *
1156 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1157 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1158 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1159 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1160 (direction == FD_DIR_READ && dma_mode == 1)) {
1161 /* No access is allowed until DMA transfer has completed */
1162 fdctrl->state |= FD_CTRL_BUSY;
1163 /* Now, we just have to wait for the DMA controller to
1164 * recall us...
1165 */
1166 DMA_hold_DREQ(fdctrl->dma_chann);
1167 DMA_schedule(fdctrl->dma_chann);
1168 return;
1169 } else {
1170 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1171 }
1172 }
1173 FLOPPY_DPRINTF("start non-DMA transfer\n");
1174 /* IO based transfer: calculate len */
1175 fdctrl_raise_irq(fdctrl, 0x00);
1176
1177 return;
1178 }
1179
1180 /* Prepare a transfer of deleted data */
1181 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1182 {
1183 /* We don't handle deleted data,
1184 * so we don't return *ANYTHING*
1185 */
1186 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1187 }
1188
1189 /* handlers for DMA transfers */
1190 static int fdctrl_transfer_handler (void *opaque, int nchan,
1191 int dma_pos, int dma_len)
1192 {
1193 fdctrl_t *fdctrl;
1194 fdrive_t *cur_drv;
1195 int len, start_pos, rel_pos;
1196 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1197
1198 fdctrl = opaque;
1199 if (!(fdctrl->state & FD_CTRL_BUSY)) {
1200 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1201 return 0;
1202 }
1203 cur_drv = get_cur_drv(fdctrl);
1204 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1205 fdctrl->data_dir == FD_DIR_SCANH)
1206 status2 = 0x04;
1207 if (dma_len > fdctrl->data_len)
1208 dma_len = fdctrl->data_len;
1209 if (cur_drv->bs == NULL) {
1210 if (fdctrl->data_dir == FD_DIR_WRITE)
1211 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1212 else
1213 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1214 len = 0;
1215 goto transfer_error;
1216 }
1217 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1218 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1219 len = dma_len - fdctrl->data_pos;
1220 if (len + rel_pos > FD_SECTOR_LEN)
1221 len = FD_SECTOR_LEN - rel_pos;
1222 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1223 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1224 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1225 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1226 fd_sector(cur_drv) * FD_SECTOR_LEN);
1227 if (fdctrl->data_dir != FD_DIR_WRITE ||
1228 len < FD_SECTOR_LEN || rel_pos != 0) {
1229 /* READ & SCAN commands and realign to a sector for WRITE */
1230 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1231 fdctrl->fifo, 1) < 0) {
1232 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1233 fd_sector(cur_drv));
1234 /* Sure, image size is too small... */
1235 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1236 }
1237 }
1238 switch (fdctrl->data_dir) {
1239 case FD_DIR_READ:
1240 /* READ commands */
1241 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1242 fdctrl->data_pos, len);
1243 break;
1244 case FD_DIR_WRITE:
1245 /* WRITE commands */
1246 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1247 fdctrl->data_pos, len);
1248 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1249 fdctrl->fifo, 1) < 0) {
1250 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1251 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1252 goto transfer_error;
1253 }
1254 break;
1255 default:
1256 /* SCAN commands */
1257 {
1258 uint8_t tmpbuf[FD_SECTOR_LEN];
1259 int ret;
1260 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1261 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1262 if (ret == 0) {
1263 status2 = 0x08;
1264 goto end_transfer;
1265 }
1266 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1267 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1268 status2 = 0x00;
1269 goto end_transfer;
1270 }
1271 }
1272 break;
1273 }
1274 fdctrl->data_pos += len;
1275 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1276 if (rel_pos == 0) {
1277 /* Seek to next sector */
1278 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1279 cur_drv->head, cur_drv->track, cur_drv->sect,
1280 fd_sector(cur_drv),
1281 fdctrl->data_pos - len);
1282 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1283 error in fact */
1284 if (cur_drv->sect >= cur_drv->last_sect ||
1285 cur_drv->sect == fdctrl->eot) {
1286 cur_drv->sect = 1;
1287 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1288 if (cur_drv->head == 0 &&
1289 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1290 cur_drv->head = 1;
1291 } else {
1292 cur_drv->head = 0;
1293 cur_drv->track++;
1294 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1295 break;
1296 }
1297 } else {
1298 cur_drv->track++;
1299 break;
1300 }
1301 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1302 cur_drv->head, cur_drv->track,
1303 cur_drv->sect, fd_sector(cur_drv));
1304 } else {
1305 cur_drv->sect++;
1306 }
1307 }
1308 }
1309 end_transfer:
1310 len = fdctrl->data_pos - start_pos;
1311 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1312 fdctrl->data_pos, len, fdctrl->data_len);
1313 if (fdctrl->data_dir == FD_DIR_SCANE ||
1314 fdctrl->data_dir == FD_DIR_SCANL ||
1315 fdctrl->data_dir == FD_DIR_SCANH)
1316 status2 = 0x08;
1317 if (FD_DID_SEEK(fdctrl->data_state))
1318 status0 |= FD_SR0_SEEK;
1319 fdctrl->data_len -= len;
1320 // if (fdctrl->data_len == 0)
1321 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1322 transfer_error:
1323
1324 return len;
1325 }
1326
1327 /* Data register : 0x05 */
1328 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1329 {
1330 fdrive_t *cur_drv;
1331 uint32_t retval = 0;
1332 int pos, len;
1333
1334 cur_drv = get_cur_drv(fdctrl);
1335 fdctrl->state &= ~FD_CTRL_SLEEP;
1336 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1337 FLOPPY_ERROR("can't read data in CMD state\n");
1338 return 0;
1339 }
1340 pos = fdctrl->data_pos;
1341 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1342 pos %= FD_SECTOR_LEN;
1343 if (pos == 0) {
1344 len = fdctrl->data_len - fdctrl->data_pos;
1345 if (len > FD_SECTOR_LEN)
1346 len = FD_SECTOR_LEN;
1347 bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1348 }
1349 }
1350 retval = fdctrl->fifo[pos];
1351 if (++fdctrl->data_pos == fdctrl->data_len) {
1352 fdctrl->data_pos = 0;
1353 /* Switch from transfer mode to status mode
1354 * then from status mode to command mode
1355 */
1356 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1357 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1358 } else {
1359 fdctrl_reset_fifo(fdctrl);
1360 fdctrl_reset_irq(fdctrl);
1361 }
1362 }
1363 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1364
1365 return retval;
1366 }
1367
1368 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1369 {
1370 fdrive_t *cur_drv;
1371 uint8_t kh, kt, ks;
1372 int did_seek;
1373
1374 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1375 cur_drv = get_cur_drv(fdctrl);
1376 kt = fdctrl->fifo[6];
1377 kh = fdctrl->fifo[7];
1378 ks = fdctrl->fifo[8];
1379 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1380 fdctrl->cur_drv, kh, kt, ks,
1381 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1382 did_seek = 0;
1383 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1384 case 2:
1385 /* sect too big */
1386 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1387 fdctrl->fifo[3] = kt;
1388 fdctrl->fifo[4] = kh;
1389 fdctrl->fifo[5] = ks;
1390 return;
1391 case 3:
1392 /* track too big */
1393 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x80, 0x00);
1394 fdctrl->fifo[3] = kt;
1395 fdctrl->fifo[4] = kh;
1396 fdctrl->fifo[5] = ks;
1397 return;
1398 case 4:
1399 /* No seek enabled */
1400 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1401 fdctrl->fifo[3] = kt;
1402 fdctrl->fifo[4] = kh;
1403 fdctrl->fifo[5] = ks;
1404 return;
1405 case 1:
1406 did_seek = 1;
1407 fdctrl->data_state |= FD_STATE_SEEK;
1408 break;
1409 default:
1410 break;
1411 }
1412 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1413 if (cur_drv->bs == NULL ||
1414 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1415 FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1416 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1417 } else {
1418 if (cur_drv->sect == cur_drv->last_sect) {
1419 fdctrl->data_state &= ~FD_STATE_FORMAT;
1420 /* Last sector done */
1421 if (FD_DID_SEEK(fdctrl->data_state))
1422 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1423 else
1424 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1425 } else {
1426 /* More to do */
1427 fdctrl->data_pos = 0;
1428 fdctrl->data_len = 4;
1429 }
1430 }
1431 }
1432
1433 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1434 {
1435 fdrive_t *cur_drv;
1436
1437 cur_drv = get_cur_drv(fdctrl);
1438 /* Reset mode */
1439 if (fdctrl->state & FD_CTRL_RESET) {
1440 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1441 return;
1442 }
1443 fdctrl->state &= ~FD_CTRL_SLEEP;
1444 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1445 FLOPPY_ERROR("can't write data in status mode\n");
1446 return;
1447 }
1448 /* Is it write command time ? */
1449 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1450 /* FIFO data write */
1451 fdctrl->fifo[fdctrl->data_pos++] = value;
1452 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1453 fdctrl->data_pos == fdctrl->data_len) {
1454 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1455 }
1456 /* Switch from transfer mode to status mode
1457 * then from status mode to command mode
1458 */
1459 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1460 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1461 return;
1462 }
1463 if (fdctrl->data_pos == 0) {
1464 /* Command */
1465 switch (value & 0x5F) {
1466 case FD_CMD_READ:
1467 /* READ variants */
1468 FLOPPY_DPRINTF("READ command\n");
1469 /* 8 parameters cmd */
1470 fdctrl->data_len = 9;
1471 goto enqueue;
1472 case FD_CMD_READ_DELETED:
1473 /* READ_DELETED variants */
1474 FLOPPY_DPRINTF("READ_DELETED command\n");
1475 /* 8 parameters cmd */
1476 fdctrl->data_len = 9;
1477 goto enqueue;
1478 case FD_CMD_SCAN_EQUAL:
1479 /* SCAN_EQUAL variants */
1480 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1481 /* 8 parameters cmd */
1482 fdctrl->data_len = 9;
1483 goto enqueue;
1484 case FD_CMD_VERIFY:
1485 /* VERIFY variants */
1486 FLOPPY_DPRINTF("VERIFY command\n");
1487 /* 8 parameters cmd */
1488 fdctrl->data_len = 9;
1489 goto enqueue;
1490 case FD_CMD_SCAN_LOW_OR_EQUAL:
1491 /* SCAN_LOW_OR_EQUAL variants */
1492 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1493 /* 8 parameters cmd */
1494 fdctrl->data_len = 9;
1495 goto enqueue;
1496 case FD_CMD_SCAN_HIGH_OR_EQUAL:
1497 /* SCAN_HIGH_OR_EQUAL variants */
1498 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1499 /* 8 parameters cmd */
1500 fdctrl->data_len = 9;
1501 goto enqueue;
1502 default:
1503 break;
1504 }
1505 switch (value & 0x7F) {
1506 case FD_CMD_WRITE:
1507 /* WRITE variants */
1508 FLOPPY_DPRINTF("WRITE command\n");
1509 /* 8 parameters cmd */
1510 fdctrl->data_len = 9;
1511 goto enqueue;
1512 case FD_CMD_WRITE_DELETED:
1513 /* WRITE_DELETED variants */
1514 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1515 /* 8 parameters cmd */
1516 fdctrl->data_len = 9;
1517 goto enqueue;
1518 default:
1519 break;
1520 }
1521 switch (value) {
1522 case FD_CMD_SPECIFY:
1523 /* SPECIFY */
1524 FLOPPY_DPRINTF("SPECIFY command\n");
1525 /* 1 parameter cmd */
1526 fdctrl->data_len = 3;
1527 goto enqueue;
1528 case FD_CMD_SENSE_DRIVE_STATUS:
1529 /* SENSE_DRIVE_STATUS */
1530 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1531 /* 1 parameter cmd */
1532 fdctrl->data_len = 2;
1533 goto enqueue;
1534 case FD_CMD_RECALIBRATE:
1535 /* RECALIBRATE */
1536 FLOPPY_DPRINTF("RECALIBRATE command\n");
1537 /* 1 parameter cmd */
1538 fdctrl->data_len = 2;
1539 goto enqueue;
1540 case FD_CMD_SENSE_INTERRUPT_STATUS:
1541 /* SENSE_INTERRUPT_STATUS */
1542 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1543 fdctrl->int_status);
1544 /* No parameters cmd: returns status if no interrupt */
1545 #if 0
1546 fdctrl->fifo[0] =
1547 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1548 #else
1549 /* XXX: int_status handling is broken for read/write
1550 commands, so we do this hack. It should be suppressed
1551 ASAP */
1552 fdctrl->fifo[0] =
1553 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1554 #endif
1555 fdctrl->fifo[1] = cur_drv->track;
1556 fdctrl_set_fifo(fdctrl, 2, 0);
1557 fdctrl_reset_irq(fdctrl);
1558 fdctrl->int_status = FD_SR0_RDYCHG;
1559 return;
1560 case FD_CMD_DUMPREG:
1561 /* DUMPREG */
1562 FLOPPY_DPRINTF("DUMPREG command\n");
1563 /* Drives position */
1564 fdctrl->fifo[0] = drv0(fdctrl)->track;
1565 fdctrl->fifo[1] = drv1(fdctrl)->track;
1566 fdctrl->fifo[2] = 0;
1567 fdctrl->fifo[3] = 0;
1568 /* timers */
1569 fdctrl->fifo[4] = fdctrl->timer0;
1570 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1571 fdctrl->fifo[6] = cur_drv->last_sect;
1572 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1573 (cur_drv->perpendicular << 2);
1574 fdctrl->fifo[8] = fdctrl->config;
1575 fdctrl->fifo[9] = fdctrl->precomp_trk;
1576 fdctrl_set_fifo(fdctrl, 10, 0);
1577 return;
1578 case FD_CMD_SEEK:
1579 /* SEEK */
1580 FLOPPY_DPRINTF("SEEK command\n");
1581 /* 2 parameters cmd */
1582 fdctrl->data_len = 3;
1583 goto enqueue;
1584 case FD_CMD_VERSION:
1585 /* VERSION */
1586 FLOPPY_DPRINTF("VERSION command\n");
1587 /* No parameters cmd */
1588 /* Controller's version */
1589 fdctrl->fifo[0] = fdctrl->version;
1590 fdctrl_set_fifo(fdctrl, 1, 1);
1591 return;
1592 case FD_CMD_PERPENDICULAR_MODE:
1593 /* PERPENDICULAR_MODE */
1594 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1595 /* 1 parameter cmd */
1596 fdctrl->data_len = 2;
1597 goto enqueue;
1598 case FD_CMD_CONFIGURE:
1599 /* CONFIGURE */
1600 FLOPPY_DPRINTF("CONFIGURE command\n");
1601 /* 3 parameters cmd */
1602 fdctrl->data_len = 4;
1603 goto enqueue;
1604 case FD_CMD_UNLOCK:
1605 /* UNLOCK */
1606 FLOPPY_DPRINTF("UNLOCK command\n");
1607 /* No parameters cmd */
1608 fdctrl->lock = 0;
1609 fdctrl->fifo[0] = 0;
1610 fdctrl_set_fifo(fdctrl, 1, 0);
1611 return;
1612 case FD_CMD_POWERDOWN_MODE:
1613 /* POWERDOWN_MODE */
1614 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1615 /* 2 parameters cmd */
1616 fdctrl->data_len = 3;
1617 goto enqueue;
1618 case FD_CMD_PART_ID:
1619 /* PART_ID */
1620 FLOPPY_DPRINTF("PART_ID command\n");
1621 /* No parameters cmd */
1622 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1623 fdctrl_set_fifo(fdctrl, 1, 0);
1624 return;
1625 case FD_CMD_SAVE:
1626 /* SAVE */
1627 FLOPPY_DPRINTF("SAVE command\n");
1628 /* No parameters cmd */
1629 fdctrl->fifo[0] = 0;
1630 fdctrl->fifo[1] = 0;
1631 /* Drives position */
1632 fdctrl->fifo[2] = drv0(fdctrl)->track;
1633 fdctrl->fifo[3] = drv1(fdctrl)->track;
1634 fdctrl->fifo[4] = 0;
1635 fdctrl->fifo[5] = 0;
1636 /* timers */
1637 fdctrl->fifo[6] = fdctrl->timer0;
1638 fdctrl->fifo[7] = fdctrl->timer1;
1639 fdctrl->fifo[8] = cur_drv->last_sect;
1640 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1641 (cur_drv->perpendicular << 2);
1642 fdctrl->fifo[10] = fdctrl->config;
1643 fdctrl->fifo[11] = fdctrl->precomp_trk;
1644 fdctrl->fifo[12] = fdctrl->pwrd;
1645 fdctrl->fifo[13] = 0;
1646 fdctrl->fifo[14] = 0;
1647 fdctrl_set_fifo(fdctrl, 15, 1);
1648 return;
1649 case FD_CMD_OPTION:
1650 /* OPTION */
1651 FLOPPY_DPRINTF("OPTION command\n");
1652 /* 1 parameter cmd */
1653 fdctrl->data_len = 2;
1654 goto enqueue;
1655 case FD_CMD_READ_TRACK:
1656 /* READ_TRACK */
1657 FLOPPY_DPRINTF("READ_TRACK command\n");
1658 /* 8 parameters cmd */
1659 fdctrl->data_len = 9;
1660 goto enqueue;
1661 case FD_CMD_READ_ID:
1662 /* READ_ID */
1663 FLOPPY_DPRINTF("READ_ID command\n");
1664 /* 1 parameter cmd */
1665 fdctrl->data_len = 2;
1666 goto enqueue;
1667 case FD_CMD_RESTORE:
1668 /* RESTORE */
1669 FLOPPY_DPRINTF("RESTORE command\n");
1670 /* 17 parameters cmd */
1671 fdctrl->data_len = 18;
1672 goto enqueue;
1673 case FD_CMD_FORMAT_TRACK:
1674 /* FORMAT_TRACK */
1675 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1676 /* 5 parameters cmd */
1677 fdctrl->data_len = 6;
1678 goto enqueue;
1679 case FD_CMD_DRIVE_SPECIFICATION_COMMAND:
1680 /* DRIVE_SPECIFICATION_COMMAND */
1681 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1682 /* 5 parameters cmd */
1683 fdctrl->data_len = 6;
1684 goto enqueue;
1685 case FD_CMD_RELATIVE_SEEK_OUT:
1686 /* RELATIVE_SEEK_OUT */
1687 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1688 /* 2 parameters cmd */
1689 fdctrl->data_len = 3;
1690 goto enqueue;
1691 case FD_CMD_LOCK:
1692 /* LOCK */
1693 FLOPPY_DPRINTF("LOCK command\n");
1694 /* No parameters cmd */
1695 fdctrl->lock = 1;
1696 fdctrl->fifo[0] = 0x10;
1697 fdctrl_set_fifo(fdctrl, 1, 1);
1698 return;
1699 case FD_CMD_FORMAT_AND_WRITE:
1700 /* FORMAT_AND_WRITE */
1701 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1702 /* 10 parameters cmd */
1703 fdctrl->data_len = 11;
1704 goto enqueue;
1705 case FD_CMD_RELATIVE_SEEK_IN:
1706 /* RELATIVE_SEEK_IN */
1707 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1708 /* 2 parameters cmd */
1709 fdctrl->data_len = 3;
1710 goto enqueue;
1711 default:
1712 /* Unknown command */
1713 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1714 fdctrl_unimplemented(fdctrl);
1715 return;
1716 }
1717 }
1718 enqueue:
1719 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1720 fdctrl->fifo[fdctrl->data_pos] = value;
1721 if (++fdctrl->data_pos == fdctrl->data_len) {
1722 /* We now have all parameters
1723 * and will be able to treat the command
1724 */
1725 if (fdctrl->data_state & FD_STATE_FORMAT) {
1726 fdctrl_format_sector(fdctrl);
1727 return;
1728 }
1729 switch (fdctrl->fifo[0] & 0x1F) {
1730 case FD_CMD_READ & 0x1F:
1731 {
1732 /* READ variants */
1733 FLOPPY_DPRINTF("treat READ command\n");
1734 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1735 return;
1736 }
1737 case FD_CMD_READ_DELETED & 0x1F:
1738 /* READ_DELETED variants */
1739 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1740 FLOPPY_ERROR("treat READ_DELETED command\n");
1741 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1742 return;
1743 case FD_CMD_VERIFY & 0x1F:
1744 /* VERIFY variants */
1745 // FLOPPY_DPRINTF("treat VERIFY command\n");
1746 FLOPPY_ERROR("treat VERIFY command\n");
1747 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1748 return;
1749 case FD_CMD_SCAN_EQUAL & 0x1F:
1750 /* SCAN_EQUAL variants */
1751 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1752 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1753 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1754 return;
1755 case FD_CMD_SCAN_LOW_OR_EQUAL & 0x1F:
1756 /* SCAN_LOW_OR_EQUAL variants */
1757 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1758 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1759 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1760 return;
1761 case FD_CMD_SCAN_HIGH_OR_EQUAL & 0x1F:
1762 /* SCAN_HIGH_OR_EQUAL variants */
1763 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1764 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1765 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1766 return;
1767 default:
1768 break;
1769 }
1770 switch (fdctrl->fifo[0] & 0x3F) {
1771 case FD_CMD_WRITE & 0x3F:
1772 /* WRITE variants */
1773 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1774 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1775 return;
1776 case FD_CMD_WRITE_DELETED & 0x3F:
1777 /* WRITE_DELETED variants */
1778 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1779 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1780 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1781 return;
1782 default:
1783 break;
1784 }
1785 switch (fdctrl->fifo[0]) {
1786 case FD_CMD_SPECIFY:
1787 /* SPECIFY */
1788 FLOPPY_DPRINTF("treat SPECIFY command\n");
1789 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1790 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1791 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1792 /* No result back */
1793 fdctrl_reset_fifo(fdctrl);
1794 break;
1795 case FD_CMD_SENSE_DRIVE_STATUS:
1796 /* SENSE_DRIVE_STATUS */
1797 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1798 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1799 cur_drv = get_cur_drv(fdctrl);
1800 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1801 /* 1 Byte status back */
1802 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1803 (cur_drv->track == 0 ? 0x10 : 0x00) |
1804 (cur_drv->head << 2) |
1805 fdctrl->cur_drv |
1806 0x28;
1807 fdctrl_set_fifo(fdctrl, 1, 0);
1808 break;
1809 case FD_CMD_RECALIBRATE:
1810 /* RECALIBRATE */
1811 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1812 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1813 cur_drv = get_cur_drv(fdctrl);
1814 fd_recalibrate(cur_drv);
1815 fdctrl_reset_fifo(fdctrl);
1816 /* Raise Interrupt */
1817 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1818 break;
1819 case FD_CMD_SEEK:
1820 /* SEEK */
1821 FLOPPY_DPRINTF("treat SEEK command\n");
1822 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1823 cur_drv = get_cur_drv(fdctrl);
1824 fd_start(cur_drv);
1825 if (fdctrl->fifo[2] <= cur_drv->track)
1826 cur_drv->dir = 1;
1827 else
1828 cur_drv->dir = 0;
1829 fdctrl_reset_fifo(fdctrl);
1830 if (fdctrl->fifo[2] > cur_drv->max_track) {
1831 fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK);
1832 } else {
1833 cur_drv->track = fdctrl->fifo[2];
1834 /* Raise Interrupt */
1835 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1836 }
1837 break;
1838 case FD_CMD_PERPENDICULAR_MODE:
1839 /* PERPENDICULAR_MODE */
1840 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1841 if (fdctrl->fifo[1] & 0x80)
1842 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1843 /* No result back */
1844 fdctrl_reset_fifo(fdctrl);
1845 break;
1846 case FD_CMD_CONFIGURE:
1847 /* CONFIGURE */
1848 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1849 fdctrl->config = fdctrl->fifo[2];
1850 fdctrl->precomp_trk = fdctrl->fifo[3];
1851 /* No result back */
1852 fdctrl_reset_fifo(fdctrl);
1853 break;
1854 case FD_CMD_POWERDOWN_MODE:
1855 /* POWERDOWN_MODE */
1856 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1857 fdctrl->pwrd = fdctrl->fifo[1];
1858 fdctrl->fifo[0] = fdctrl->fifo[1];
1859 fdctrl_set_fifo(fdctrl, 1, 1);
1860 break;
1861 case FD_CMD_OPTION:
1862 /* OPTION */
1863 FLOPPY_DPRINTF("treat OPTION command\n");
1864 /* No result back */
1865 fdctrl_reset_fifo(fdctrl);
1866 break;
1867 case FD_CMD_READ_TRACK:
1868 /* READ_TRACK */
1869 FLOPPY_DPRINTF("treat READ_TRACK command\n");
1870 FLOPPY_ERROR("treat READ_TRACK command\n");
1871 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1872 break;
1873 case FD_CMD_READ_ID:
1874 /* READ_ID */
1875 FLOPPY_DPRINTF("treat READ_ID command\n");
1876 /* XXX: should set main status register to busy */
1877 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1878 qemu_mod_timer(fdctrl->result_timer,
1879 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1880 break;
1881 case FD_CMD_RESTORE:
1882 /* RESTORE */
1883 FLOPPY_DPRINTF("treat RESTORE command\n");
1884 /* Drives position */
1885 drv0(fdctrl)->track = fdctrl->fifo[3];
1886 drv1(fdctrl)->track = fdctrl->fifo[4];
1887 /* timers */
1888 fdctrl->timer0 = fdctrl->fifo[7];
1889 fdctrl->timer1 = fdctrl->fifo[8];
1890 cur_drv->last_sect = fdctrl->fifo[9];
1891 fdctrl->lock = fdctrl->fifo[10] >> 7;
1892 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1893 fdctrl->config = fdctrl->fifo[11];
1894 fdctrl->precomp_trk = fdctrl->fifo[12];
1895 fdctrl->pwrd = fdctrl->fifo[13];
1896 fdctrl_reset_fifo(fdctrl);
1897 break;
1898 case FD_CMD_FORMAT_TRACK:
1899 /* FORMAT_TRACK */
1900 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1901 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1902 cur_drv = get_cur_drv(fdctrl);
1903 fdctrl->data_state |= FD_STATE_FORMAT;
1904 if (fdctrl->fifo[0] & 0x80)
1905 fdctrl->data_state |= FD_STATE_MULTI;
1906 else
1907 fdctrl->data_state &= ~FD_STATE_MULTI;
1908 fdctrl->data_state &= ~FD_STATE_SEEK;
1909 cur_drv->bps =
1910 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1911 #if 0
1912 cur_drv->last_sect =
1913 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1914 fdctrl->fifo[3] / 2;
1915 #else
1916 cur_drv->last_sect = fdctrl->fifo[3];
1917 #endif
1918 /* TODO: implement format using DMA expected by the Bochs BIOS
1919 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1920 * the sector with the specified fill byte
1921 */
1922 fdctrl->data_state &= ~FD_STATE_FORMAT;
1923 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1924 break;
1925 case FD_CMD_DRIVE_SPECIFICATION_COMMAND:
1926 /* DRIVE_SPECIFICATION_COMMAND */
1927 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1928 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1929 /* Command parameters done */
1930 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1931 fdctrl->fifo[0] = fdctrl->fifo[1];
1932 fdctrl->fifo[2] = 0;
1933 fdctrl->fifo[3] = 0;
1934 fdctrl_set_fifo(fdctrl, 4, 1);
1935 } else {
1936 fdctrl_reset_fifo(fdctrl);
1937 }
1938 } else if (fdctrl->data_len > 7) {
1939 /* ERROR */
1940 fdctrl->fifo[0] = 0x80 |
1941 (cur_drv->head << 2) | fdctrl->cur_drv;
1942 fdctrl_set_fifo(fdctrl, 1, 1);
1943 }
1944 break;
1945 case FD_CMD_RELATIVE_SEEK_OUT:
1946 /* RELATIVE_SEEK_OUT */
1947 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1948 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1949 cur_drv = get_cur_drv(fdctrl);
1950 fd_start(cur_drv);
1951 cur_drv->dir = 0;
1952 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1953 cur_drv->track = cur_drv->max_track - 1;
1954 } else {
1955 cur_drv->track += fdctrl->fifo[2];
1956 }
1957 fdctrl_reset_fifo(fdctrl);
1958 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1959 break;
1960 case FD_CMD_FORMAT_AND_WRITE:
1961 /* FORMAT_AND_WRITE */
1962 FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1963 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1964 fdctrl_unimplemented(fdctrl);
1965 break;
1966 case FD_CMD_RELATIVE_SEEK_IN:
1967 /* RELATIVE_SEEK_IN */
1968 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1969 fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
1970 cur_drv = get_cur_drv(fdctrl);
1971 fd_start(cur_drv);
1972 cur_drv->dir = 1;
1973 if (fdctrl->fifo[2] > cur_drv->track) {
1974 cur_drv->track = 0;
1975 } else {
1976 cur_drv->track -= fdctrl->fifo[2];
1977 }
1978 fdctrl_reset_fifo(fdctrl);
1979 /* Raise Interrupt */
1980 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1981 break;
1982 }
1983 }
1984 }
1985
1986 static void fdctrl_result_timer(void *opaque)
1987 {
1988 fdctrl_t *fdctrl = opaque;
1989 fdrive_t *cur_drv = get_cur_drv(fdctrl);
1990
1991 /* Pretend we are spinning.
1992 * This is needed for Coherent, which uses READ ID to check for
1993 * sector interleaving.
1994 */
1995 if (cur_drv->last_sect != 0) {
1996 cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
1997 }
1998 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1999 }
QEMU patches