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Check for invalid initrd file
[qemu/aliguori-queue.git] / hw / fdc.c
blobc4ca9e9021516fb2b7a2f0d12bf44d344ed887a0
1 /*
2 * QEMU Floppy disk emulator (Intel 82078)
3 *
4 * Copyright (c) 2003, 2007 Jocelyn Mayer
5 * Copyright (c) 2008 Hervé Poussineau
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25 /*
26 * The controller is used in Sun4m systems in a slightly different
27 * way. There are changes in DOR register and DMA is not available.
28 */
29
30 #include "hw.h"
31 #include "fdc.h"
32 #include "block.h"
33 #include "qemu-timer.h"
34 #include "isa.h"
35 #include "sysbus.h"
36 #include "qdev-addr.h"
37
38 /********************************************************/
39 /* debug Floppy devices */
40 //#define DEBUG_FLOPPY
41
42 #ifdef DEBUG_FLOPPY
43 #define FLOPPY_DPRINTF(fmt, ...) \
44 do { printf("FLOPPY: " fmt , ## __VA_ARGS__); } while (0)
45 #else
46 #define FLOPPY_DPRINTF(fmt, ...)
47 #endif
48
49 #define FLOPPY_ERROR(fmt, ...) \
50 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0)
51
52 /********************************************************/
53 /* Floppy drive emulation */
54
55 #define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
56 #define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
57
58 /* Will always be a fixed parameter for us */
59 #define FD_SECTOR_LEN 512
60 #define FD_SECTOR_SC 2 /* Sector size code */
61 #define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */
62
63 /* Floppy disk drive emulation */
64 typedef enum FDiskType {
65 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
66 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
67 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
68 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
69 FDRIVE_DISK_NONE = 0x05, /* No disk */
70 } FDiskType;
71
72 typedef enum FDriveType {
73 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
74 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
75 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
76 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
77 } FDriveType;
78
79 typedef enum FDiskFlags {
80 FDISK_DBL_SIDES = 0x01,
81 } FDiskFlags;
82
83 typedef struct FDrive {
84 DriveInfo *dinfo;
85 BlockDriverState *bs;
86 /* Drive status */
87 FDriveType drive;
88 uint8_t perpendicular; /* 2.88 MB access mode */
89 /* Position */
90 uint8_t head;
91 uint8_t track;
92 uint8_t sect;
93 /* Media */
94 FDiskFlags flags;
95 uint8_t last_sect; /* Nb sector per track */
96 uint8_t max_track; /* Nb of tracks */
97 uint16_t bps; /* Bytes per sector */
98 uint8_t ro; /* Is read-only */
99 } FDrive;
100
101 static void fd_init(FDrive *drv)
102 {
103 /* Drive */
104 drv->bs = drv->dinfo ? drv->dinfo->bdrv : NULL;
105 drv->drive = FDRIVE_DRV_NONE;
106 drv->perpendicular = 0;
107 /* Disk */
108 drv->last_sect = 0;
109 drv->max_track = 0;
110 }
111
112 static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
113 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 *drv)
120 {
121 return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect);
122 }
123
124 /* Seek to a new position:
125 * returns 0 if already on right track
126 * returns 1 if track changed
127 * returns 2 if track is invalid
128 * returns 3 if sector is invalid
129 * returns 4 if seek is disabled
130 */
131 static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect,
132 int enable_seek)
133 {
134 uint32_t sector;
135 int ret;
136
137 if (track > drv->max_track ||
138 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
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 2;
144 }
145 if (sect > drv->last_sect) {
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);
150 return 3;
151 }
152 sector = fd_sector_calc(head, track, sect, drv->last_sect);
153 ret = 0;
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;
163 if (drv->track != track)
164 ret = 1;
165 drv->track = track;
166 drv->sect = sect;
167 }
168
169 return ret;
170 }
171
172 /* Set drive back to track 0 */
173 static void fd_recalibrate(FDrive *drv)
174 {
175 FLOPPY_DPRINTF("recalibrate\n");
176 drv->head = 0;
177 drv->track = 0;
178 drv->sect = 1;
179 }
180
181 /* Recognize floppy formats */
182 typedef struct FDFormat {
183 FDriveType drive;
184 FDiskType disk;
185 uint8_t last_sect;
186 uint8_t max_track;
187 uint8_t max_head;
188 const char *str;
189 } FDFormat;
190
191 static const FDFormat fd_formats[] = {
192 /* First entry is default format */
193 /* 1.44 MB 3"1/2 floppy disks */
194 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
195 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
196 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
197 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
198 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
199 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
200 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
201 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
202 /* 2.88 MB 3"1/2 floppy disks */
203 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
204 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
205 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
206 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
207 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
208 /* 720 kB 3"1/2 floppy disks */
209 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
210 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
211 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
212 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
213 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
214 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
215 /* 1.2 MB 5"1/4 floppy disks */
216 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
217 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
219 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
220 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
221 /* 720 kB 5"1/4 floppy disks */
222 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
223 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
224 /* 360 kB 5"1/4 floppy disks */
225 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
226 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
227 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
228 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
229 /* 320 kB 5"1/4 floppy disks */
230 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
231 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
232 /* 360 kB must match 5"1/4 better than 3"1/2... */
233 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
234 /* end */
235 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
236 };
237
238 /* Revalidate a disk drive after a disk change */
239 static void fd_revalidate(FDrive *drv)
240 {
241 const FDFormat *parse;
242 uint64_t nb_sectors, size;
243 int i, first_match, match;
244 int nb_heads, max_track, last_sect, ro;
245
246 FLOPPY_DPRINTF("revalidate\n");
247 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
248 ro = bdrv_is_read_only(drv->bs);
249 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
250 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
251 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
252 nb_heads - 1, max_track, last_sect);
253 } else {
254 bdrv_get_geometry(drv->bs, &nb_sectors);
255 match = -1;
256 first_match = -1;
257 for (i = 0;; i++) {
258 parse = &fd_formats[i];
259 if (parse->drive == FDRIVE_DRV_NONE)
260 break;
261 if (drv->drive == parse->drive ||
262 drv->drive == FDRIVE_DRV_NONE) {
263 size = (parse->max_head + 1) * parse->max_track *
264 parse->last_sect;
265 if (nb_sectors == size) {
266 match = i;
267 break;
268 }
269 if (first_match == -1)
270 first_match = i;
271 }
272 }
273 if (match == -1) {
274 if (first_match == -1)
275 match = 1;
276 else
277 match = first_match;
278 parse = &fd_formats[match];
279 }
280 nb_heads = parse->max_head + 1;
281 max_track = parse->max_track;
282 last_sect = parse->last_sect;
283 drv->drive = parse->drive;
284 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
285 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
286 }
287 if (nb_heads == 1) {
288 drv->flags &= ~FDISK_DBL_SIDES;
289 } else {
290 drv->flags |= FDISK_DBL_SIDES;
291 }
292 drv->max_track = max_track;
293 drv->last_sect = last_sect;
294 drv->ro = ro;
295 } else {
296 FLOPPY_DPRINTF("No disk in drive\n");
297 drv->last_sect = 0;
298 drv->max_track = 0;
299 drv->flags &= ~FDISK_DBL_SIDES;
300 }
301 }
302
303 /********************************************************/
304 /* Intel 82078 floppy disk controller emulation */
305
306 static void fdctrl_reset(FDCtrl *fdctrl, int do_irq);
307 static void fdctrl_reset_fifo(FDCtrl *fdctrl);
308 static int fdctrl_transfer_handler (void *opaque, int nchan,
309 int dma_pos, int dma_len);
310 static void fdctrl_raise_irq(FDCtrl *fdctrl, uint8_t status0);
311
312 static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl);
313 static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl);
314 static uint32_t fdctrl_read_dor(FDCtrl *fdctrl);
315 static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value);
316 static uint32_t fdctrl_read_tape(FDCtrl *fdctrl);
317 static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value);
318 static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl);
319 static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value);
320 static uint32_t fdctrl_read_data(FDCtrl *fdctrl);
321 static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value);
322 static uint32_t fdctrl_read_dir(FDCtrl *fdctrl);
323
324 enum {
325 FD_DIR_WRITE = 0,
326 FD_DIR_READ = 1,
327 FD_DIR_SCANE = 2,
328 FD_DIR_SCANL = 3,
329 FD_DIR_SCANH = 4,
330 };
331
332 enum {
333 FD_STATE_MULTI = 0x01, /* multi track flag */
334 FD_STATE_FORMAT = 0x02, /* format flag */
335 FD_STATE_SEEK = 0x04, /* seek flag */
336 };
337
338 enum {
339 FD_REG_SRA = 0x00,
340 FD_REG_SRB = 0x01,
341 FD_REG_DOR = 0x02,
342 FD_REG_TDR = 0x03,
343 FD_REG_MSR = 0x04,
344 FD_REG_DSR = 0x04,
345 FD_REG_FIFO = 0x05,
346 FD_REG_DIR = 0x07,
347 };
348
349 enum {
350 FD_CMD_READ_TRACK = 0x02,
351 FD_CMD_SPECIFY = 0x03,
352 FD_CMD_SENSE_DRIVE_STATUS = 0x04,
353 FD_CMD_WRITE = 0x05,
354 FD_CMD_READ = 0x06,
355 FD_CMD_RECALIBRATE = 0x07,
356 FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
357 FD_CMD_WRITE_DELETED = 0x09,
358 FD_CMD_READ_ID = 0x0a,
359 FD_CMD_READ_DELETED = 0x0c,
360 FD_CMD_FORMAT_TRACK = 0x0d,
361 FD_CMD_DUMPREG = 0x0e,
362 FD_CMD_SEEK = 0x0f,
363 FD_CMD_VERSION = 0x10,
364 FD_CMD_SCAN_EQUAL = 0x11,
365 FD_CMD_PERPENDICULAR_MODE = 0x12,
366 FD_CMD_CONFIGURE = 0x13,
367 FD_CMD_LOCK = 0x14,
368 FD_CMD_VERIFY = 0x16,
369 FD_CMD_POWERDOWN_MODE = 0x17,
370 FD_CMD_PART_ID = 0x18,
371 FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
372 FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
373 FD_CMD_SAVE = 0x2c,
374 FD_CMD_OPTION = 0x33,
375 FD_CMD_RESTORE = 0x4c,
376 FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
377 FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
378 FD_CMD_FORMAT_AND_WRITE = 0xcd,
379 FD_CMD_RELATIVE_SEEK_IN = 0xcf,
380 };
381
382 enum {
383 FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
384 FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
385 FD_CONFIG_POLL = 0x10, /* Poll enabled */
386 FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
387 FD_CONFIG_EIS = 0x40, /* No implied seeks */
388 };
389
390 enum {
391 FD_SR0_EQPMT = 0x10,
392 FD_SR0_SEEK = 0x20,
393 FD_SR0_ABNTERM = 0x40,
394 FD_SR0_INVCMD = 0x80,
395 FD_SR0_RDYCHG = 0xc0,
396 };
397
398 enum {
399 FD_SR1_EC = 0x80, /* End of cylinder */
400 };
401
402 enum {
403 FD_SR2_SNS = 0x04, /* Scan not satisfied */
404 FD_SR2_SEH = 0x08, /* Scan equal hit */
405 };
406
407 enum {
408 FD_SRA_DIR = 0x01,
409 FD_SRA_nWP = 0x02,
410 FD_SRA_nINDX = 0x04,
411 FD_SRA_HDSEL = 0x08,
412 FD_SRA_nTRK0 = 0x10,
413 FD_SRA_STEP = 0x20,
414 FD_SRA_nDRV2 = 0x40,
415 FD_SRA_INTPEND = 0x80,
416 };
417
418 enum {
419 FD_SRB_MTR0 = 0x01,
420 FD_SRB_MTR1 = 0x02,
421 FD_SRB_WGATE = 0x04,
422 FD_SRB_RDATA = 0x08,
423 FD_SRB_WDATA = 0x10,
424 FD_SRB_DR0 = 0x20,
425 };
426
427 enum {
428 #if MAX_FD == 4
429 FD_DOR_SELMASK = 0x03,
430 #else
431 FD_DOR_SELMASK = 0x01,
432 #endif
433 FD_DOR_nRESET = 0x04,
434 FD_DOR_DMAEN = 0x08,
435 FD_DOR_MOTEN0 = 0x10,
436 FD_DOR_MOTEN1 = 0x20,
437 FD_DOR_MOTEN2 = 0x40,
438 FD_DOR_MOTEN3 = 0x80,
439 };
440
441 enum {
442 #if MAX_FD == 4
443 FD_TDR_BOOTSEL = 0x0c,
444 #else
445 FD_TDR_BOOTSEL = 0x04,
446 #endif
447 };
448
449 enum {
450 FD_DSR_DRATEMASK= 0x03,
451 FD_DSR_PWRDOWN = 0x40,
452 FD_DSR_SWRESET = 0x80,
453 };
454
455 enum {
456 FD_MSR_DRV0BUSY = 0x01,
457 FD_MSR_DRV1BUSY = 0x02,
458 FD_MSR_DRV2BUSY = 0x04,
459 FD_MSR_DRV3BUSY = 0x08,
460 FD_MSR_CMDBUSY = 0x10,
461 FD_MSR_NONDMA = 0x20,
462 FD_MSR_DIO = 0x40,
463 FD_MSR_RQM = 0x80,
464 };
465
466 enum {
467 FD_DIR_DSKCHG = 0x80,
468 };
469
470 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
471 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
472 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
473
474 struct FDCtrl {
475 /* Controller's identification */
476 uint8_t version;
477 /* HW */
478 qemu_irq irq;
479 int dma_chann;
480 /* Controller state */
481 QEMUTimer *result_timer;
482 uint8_t sra;
483 uint8_t srb;
484 uint8_t dor;
485 uint8_t dor_vmstate; /* only used as temp during vmstate */
486 uint8_t tdr;
487 uint8_t dsr;
488 uint8_t msr;
489 uint8_t cur_drv;
490 uint8_t status0;
491 uint8_t status1;
492 uint8_t status2;
493 /* Command FIFO */
494 uint8_t *fifo;
495 int32_t fifo_size;
496 uint32_t data_pos;
497 uint32_t data_len;
498 uint8_t data_state;
499 uint8_t data_dir;
500 uint8_t eot; /* last wanted sector */
501 /* States kept only to be returned back */
502 /* Timers state */
503 uint8_t timer0;
504 uint8_t timer1;
505 /* precompensation */
506 uint8_t precomp_trk;
507 uint8_t config;
508 uint8_t lock;
509 /* Power down config (also with status regB access mode */
510 uint8_t pwrd;
511 /* Sun4m quirks? */
512 int sun4m;
513 /* Floppy drives */
514 uint8_t num_floppies;
515 FDrive drives[MAX_FD];
516 int reset_sensei;
517 };
518
519 typedef struct FDCtrlSysBus {
520 SysBusDevice busdev;
521 struct FDCtrl state;
522 } FDCtrlSysBus;
523
524 typedef struct FDCtrlISABus {
525 ISADevice busdev;
526 struct FDCtrl state;
527 } FDCtrlISABus;
528
529 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
530 {
531 FDCtrl *fdctrl = opaque;
532 uint32_t retval;
533
534 switch (reg) {
535 case FD_REG_SRA:
536 retval = fdctrl_read_statusA(fdctrl);
537 break;
538 case FD_REG_SRB:
539 retval = fdctrl_read_statusB(fdctrl);
540 break;
541 case FD_REG_DOR:
542 retval = fdctrl_read_dor(fdctrl);
543 break;
544 case FD_REG_TDR:
545 retval = fdctrl_read_tape(fdctrl);
546 break;
547 case FD_REG_MSR:
548 retval = fdctrl_read_main_status(fdctrl);
549 break;
550 case FD_REG_FIFO:
551 retval = fdctrl_read_data(fdctrl);
552 break;
553 case FD_REG_DIR:
554 retval = fdctrl_read_dir(fdctrl);
555 break;
556 default:
557 retval = (uint32_t)(-1);
558 break;
559 }
560 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
561
562 return retval;
563 }
564
565 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
566 {
567 FDCtrl *fdctrl = opaque;
568
569 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
570
571 switch (reg) {
572 case FD_REG_DOR:
573 fdctrl_write_dor(fdctrl, value);
574 break;
575 case FD_REG_TDR:
576 fdctrl_write_tape(fdctrl, value);
577 break;
578 case FD_REG_DSR:
579 fdctrl_write_rate(fdctrl, value);
580 break;
581 case FD_REG_FIFO:
582 fdctrl_write_data(fdctrl, value);
583 break;
584 default:
585 break;
586 }
587 }
588
589 static uint32_t fdctrl_read_port (void *opaque, uint32_t reg)
590 {
591 return fdctrl_read(opaque, reg & 7);
592 }
593
594 static void fdctrl_write_port (void *opaque, uint32_t reg, uint32_t value)
595 {
596 fdctrl_write(opaque, reg & 7, value);
597 }
598
599 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
600 {
601 return fdctrl_read(opaque, (uint32_t)reg);
602 }
603
604 static void fdctrl_write_mem (void *opaque,
605 target_phys_addr_t reg, uint32_t value)
606 {
607 fdctrl_write(opaque, (uint32_t)reg, value);
608 }
609
610 static CPUReadMemoryFunc * const fdctrl_mem_read[3] = {
611 fdctrl_read_mem,
612 fdctrl_read_mem,
613 fdctrl_read_mem,
614 };
615
616 static CPUWriteMemoryFunc * const fdctrl_mem_write[3] = {
617 fdctrl_write_mem,
618 fdctrl_write_mem,
619 fdctrl_write_mem,
620 };
621
622 static CPUReadMemoryFunc * const fdctrl_mem_read_strict[3] = {
623 fdctrl_read_mem,
624 NULL,
625 NULL,
626 };
627
628 static CPUWriteMemoryFunc * const fdctrl_mem_write_strict[3] = {
629 fdctrl_write_mem,
630 NULL,
631 NULL,
632 };
633
634 static const VMStateDescription vmstate_fdrive = {
635 .name = "fdrive",
636 .version_id = 1,
637 .minimum_version_id = 1,
638 .minimum_version_id_old = 1,
639 .fields = (VMStateField []) {
640 VMSTATE_UINT8(head, FDrive),
641 VMSTATE_UINT8(track, FDrive),
642 VMSTATE_UINT8(sect, FDrive),
643 VMSTATE_END_OF_LIST()
644 }
645 };
646
647 static void fdc_pre_save(void *opaque)
648 {
649 FDCtrl *s = opaque;
650
651 s->dor_vmstate = s->dor | GET_CUR_DRV(s);
652 }
653
654 static int fdc_post_load(void *opaque, int version_id)
655 {
656 FDCtrl *s = opaque;
657
658 SET_CUR_DRV(s, s->dor_vmstate & FD_DOR_SELMASK);
659 s->dor = s->dor_vmstate & ~FD_DOR_SELMASK;
660 return 0;
661 }
662
663 static const VMStateDescription vmstate_fdc = {
664 .name = "fdc",
665 .version_id = 2,
666 .minimum_version_id = 2,
667 .minimum_version_id_old = 2,
668 .pre_save = fdc_pre_save,
669 .post_load = fdc_post_load,
670 .fields = (VMStateField []) {
671 /* Controller State */
672 VMSTATE_UINT8(sra, FDCtrl),
673 VMSTATE_UINT8(srb, FDCtrl),
674 VMSTATE_UINT8(dor_vmstate, FDCtrl),
675 VMSTATE_UINT8(tdr, FDCtrl),
676 VMSTATE_UINT8(dsr, FDCtrl),
677 VMSTATE_UINT8(msr, FDCtrl),
678 VMSTATE_UINT8(status0, FDCtrl),
679 VMSTATE_UINT8(status1, FDCtrl),
680 VMSTATE_UINT8(status2, FDCtrl),
681 /* Command FIFO */
682 VMSTATE_VARRAY_INT32(fifo, FDCtrl, fifo_size, 0, vmstate_info_uint8,
683 uint8_t),
684 VMSTATE_UINT32(data_pos, FDCtrl),
685 VMSTATE_UINT32(data_len, FDCtrl),
686 VMSTATE_UINT8(data_state, FDCtrl),
687 VMSTATE_UINT8(data_dir, FDCtrl),
688 VMSTATE_UINT8(eot, FDCtrl),
689 /* States kept only to be returned back */
690 VMSTATE_UINT8(timer0, FDCtrl),
691 VMSTATE_UINT8(timer1, FDCtrl),
692 VMSTATE_UINT8(precomp_trk, FDCtrl),
693 VMSTATE_UINT8(config, FDCtrl),
694 VMSTATE_UINT8(lock, FDCtrl),
695 VMSTATE_UINT8(pwrd, FDCtrl),
696 VMSTATE_UINT8_EQUAL(num_floppies, FDCtrl),
697 VMSTATE_STRUCT_ARRAY(drives, FDCtrl, MAX_FD, 1,
698 vmstate_fdrive, FDrive),
699 VMSTATE_END_OF_LIST()
700 }
701 };
702
703 static void fdctrl_external_reset_sysbus(DeviceState *d)
704 {
705 FDCtrlSysBus *sys = container_of(d, FDCtrlSysBus, busdev.qdev);
706 FDCtrl *s = &sys->state;
707
708 fdctrl_reset(s, 0);
709 }
710
711 static void fdctrl_external_reset_isa(DeviceState *d)
712 {
713 FDCtrlISABus *isa = container_of(d, FDCtrlISABus, busdev.qdev);
714 FDCtrl *s = &isa->state;
715
716 fdctrl_reset(s, 0);
717 }
718
719 static void fdctrl_handle_tc(void *opaque, int irq, int level)
720 {
721 //FDCtrl *s = opaque;
722
723 if (level) {
724 // XXX
725 FLOPPY_DPRINTF("TC pulsed\n");
726 }
727 }
728
729 /* XXX: may change if moved to bdrv */
730 int fdctrl_get_drive_type(FDCtrl *fdctrl, int drive_num)
731 {
732 return fdctrl->drives[drive_num].drive;
733 }
734
735 /* Change IRQ state */
736 static void fdctrl_reset_irq(FDCtrl *fdctrl)
737 {
738 if (!(fdctrl->sra & FD_SRA_INTPEND))
739 return;
740 FLOPPY_DPRINTF("Reset interrupt\n");
741 qemu_set_irq(fdctrl->irq, 0);
742 fdctrl->sra &= ~FD_SRA_INTPEND;
743 }
744
745 static void fdctrl_raise_irq(FDCtrl *fdctrl, uint8_t status0)
746 {
747 /* Sparc mutation */
748 if (fdctrl->sun4m && (fdctrl->msr & FD_MSR_CMDBUSY)) {
749 /* XXX: not sure */
750 fdctrl->msr &= ~FD_MSR_CMDBUSY;
751 fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
752 fdctrl->status0 = status0;
753 return;
754 }
755 if (!(fdctrl->sra & FD_SRA_INTPEND)) {
756 qemu_set_irq(fdctrl->irq, 1);
757 fdctrl->sra |= FD_SRA_INTPEND;
758 }
759 fdctrl->reset_sensei = 0;
760 fdctrl->status0 = status0;
761 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
762 }
763
764 /* Reset controller */
765 static void fdctrl_reset(FDCtrl *fdctrl, int do_irq)
766 {
767 int i;
768
769 FLOPPY_DPRINTF("reset controller\n");
770 fdctrl_reset_irq(fdctrl);
771 /* Initialise controller */
772 fdctrl->sra = 0;
773 fdctrl->srb = 0xc0;
774 if (!fdctrl->drives[1].bs)
775 fdctrl->sra |= FD_SRA_nDRV2;
776 fdctrl->cur_drv = 0;
777 fdctrl->dor = FD_DOR_nRESET;
778 fdctrl->dor |= (fdctrl->dma_chann != -1) ? FD_DOR_DMAEN : 0;
779 fdctrl->msr = FD_MSR_RQM;
780 /* FIFO state */
781 fdctrl->data_pos = 0;
782 fdctrl->data_len = 0;
783 fdctrl->data_state = 0;
784 fdctrl->data_dir = FD_DIR_WRITE;
785 for (i = 0; i < MAX_FD; i++)
786 fd_recalibrate(&fdctrl->drives[i]);
787 fdctrl_reset_fifo(fdctrl);
788 if (do_irq) {
789 fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
790 fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
791 }
792 }
793
794 static inline FDrive *drv0(FDCtrl *fdctrl)
795 {
796 return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
797 }
798
799 static inline FDrive *drv1(FDCtrl *fdctrl)
800 {
801 if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
802 return &fdctrl->drives[1];
803 else
804 return &fdctrl->drives[0];
805 }
806
807 #if MAX_FD == 4
808 static inline FDrive *drv2(FDCtrl *fdctrl)
809 {
810 if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
811 return &fdctrl->drives[2];
812 else
813 return &fdctrl->drives[1];
814 }
815
816 static inline FDrive *drv3(FDCtrl *fdctrl)
817 {
818 if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
819 return &fdctrl->drives[3];
820 else
821 return &fdctrl->drives[2];
822 }
823 #endif
824
825 static FDrive *get_cur_drv(FDCtrl *fdctrl)
826 {
827 switch (fdctrl->cur_drv) {
828 case 0: return drv0(fdctrl);
829 case 1: return drv1(fdctrl);
830 #if MAX_FD == 4
831 case 2: return drv2(fdctrl);
832 case 3: return drv3(fdctrl);
833 #endif
834 default: return NULL;
835 }
836 }
837
838 /* Status A register : 0x00 (read-only) */
839 static uint32_t fdctrl_read_statusA(FDCtrl *fdctrl)
840 {
841 uint32_t retval = fdctrl->sra;
842
843 FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
844
845 return retval;
846 }
847
848 /* Status B register : 0x01 (read-only) */
849 static uint32_t fdctrl_read_statusB(FDCtrl *fdctrl)
850 {
851 uint32_t retval = fdctrl->srb;
852
853 FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
854
855 return retval;
856 }
857
858 /* Digital output register : 0x02 */
859 static uint32_t fdctrl_read_dor(FDCtrl *fdctrl)
860 {
861 uint32_t retval = fdctrl->dor;
862
863 /* Selected drive */
864 retval |= fdctrl->cur_drv;
865 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
866
867 return retval;
868 }
869
870 static void fdctrl_write_dor(FDCtrl *fdctrl, uint32_t value)
871 {
872 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
873
874 /* Motors */
875 if (value & FD_DOR_MOTEN0)
876 fdctrl->srb |= FD_SRB_MTR0;
877 else
878 fdctrl->srb &= ~FD_SRB_MTR0;
879 if (value & FD_DOR_MOTEN1)
880 fdctrl->srb |= FD_SRB_MTR1;
881 else
882 fdctrl->srb &= ~FD_SRB_MTR1;
883
884 /* Drive */
885 if (value & 1)
886 fdctrl->srb |= FD_SRB_DR0;
887 else
888 fdctrl->srb &= ~FD_SRB_DR0;
889
890 /* Reset */
891 if (!(value & FD_DOR_nRESET)) {
892 if (fdctrl->dor & FD_DOR_nRESET) {
893 FLOPPY_DPRINTF("controller enter RESET state\n");
894 }
895 } else {
896 if (!(fdctrl->dor & FD_DOR_nRESET)) {
897 FLOPPY_DPRINTF("controller out of RESET state\n");
898 fdctrl_reset(fdctrl, 1);
899 fdctrl->dsr &= ~FD_DSR_PWRDOWN;
900 }
901 }
902 /* Selected drive */
903 fdctrl->cur_drv = value & FD_DOR_SELMASK;
904
905 fdctrl->dor = value;
906 }
907
908 /* Tape drive register : 0x03 */
909 static uint32_t fdctrl_read_tape(FDCtrl *fdctrl)
910 {
911 uint32_t retval = fdctrl->tdr;
912
913 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
914
915 return retval;
916 }
917
918 static void fdctrl_write_tape(FDCtrl *fdctrl, uint32_t value)
919 {
920 /* Reset mode */
921 if (!(fdctrl->dor & FD_DOR_nRESET)) {
922 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
923 return;
924 }
925 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
926 /* Disk boot selection indicator */
927 fdctrl->tdr = value & FD_TDR_BOOTSEL;
928 /* Tape indicators: never allow */
929 }
930
931 /* Main status register : 0x04 (read) */
932 static uint32_t fdctrl_read_main_status(FDCtrl *fdctrl)
933 {
934 uint32_t retval = fdctrl->msr;
935
936 fdctrl->dsr &= ~FD_DSR_PWRDOWN;
937 fdctrl->dor |= FD_DOR_nRESET;
938
939 /* Sparc mutation */
940 if (fdctrl->sun4m) {
941 retval |= FD_MSR_DIO;
942 fdctrl_reset_irq(fdctrl);
943 };
944
945 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
946
947 return retval;
948 }
949
950 /* Data select rate register : 0x04 (write) */
951 static void fdctrl_write_rate(FDCtrl *fdctrl, uint32_t value)
952 {
953 /* Reset mode */
954 if (!(fdctrl->dor & FD_DOR_nRESET)) {
955 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
956 return;
957 }
958 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
959 /* Reset: autoclear */
960 if (value & FD_DSR_SWRESET) {
961 fdctrl->dor &= ~FD_DOR_nRESET;
962 fdctrl_reset(fdctrl, 1);
963 fdctrl->dor |= FD_DOR_nRESET;
964 }
965 if (value & FD_DSR_PWRDOWN) {
966 fdctrl_reset(fdctrl, 1);
967 }
968 fdctrl->dsr = value;
969 }
970
971 static int fdctrl_media_changed(FDrive *drv)
972 {
973 int ret;
974
975 if (!drv->bs)
976 return 0;
977 ret = bdrv_media_changed(drv->bs);
978 if (ret) {
979 fd_revalidate(drv);
980 }
981 return ret;
982 }
983
984 /* Digital input register : 0x07 (read-only) */
985 static uint32_t fdctrl_read_dir(FDCtrl *fdctrl)
986 {
987 uint32_t retval = 0;
988
989 if (fdctrl_media_changed(drv0(fdctrl))
990 || fdctrl_media_changed(drv1(fdctrl))
991 #if MAX_FD == 4
992 || fdctrl_media_changed(drv2(fdctrl))
993 || fdctrl_media_changed(drv3(fdctrl))
994 #endif
995 )
996 retval |= FD_DIR_DSKCHG;
997 if (retval != 0) {
998 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
999 }
1000
1001 return retval;
1002 }
1003
1004 /* FIFO state control */
1005 static void fdctrl_reset_fifo(FDCtrl *fdctrl)
1006 {
1007 fdctrl->data_dir = FD_DIR_WRITE;
1008 fdctrl->data_pos = 0;
1009 fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO);
1010 }
1011
1012 /* Set FIFO status for the host to read */
1013 static void fdctrl_set_fifo(FDCtrl *fdctrl, int fifo_len, int do_irq)
1014 {
1015 fdctrl->data_dir = FD_DIR_READ;
1016 fdctrl->data_len = fifo_len;
1017 fdctrl->data_pos = 0;
1018 fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO;
1019 if (do_irq)
1020 fdctrl_raise_irq(fdctrl, 0x00);
1021 }
1022
1023 /* Set an error: unimplemented/unknown command */
1024 static void fdctrl_unimplemented(FDCtrl *fdctrl, int direction)
1025 {
1026 FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
1027 fdctrl->fifo[0] = FD_SR0_INVCMD;
1028 fdctrl_set_fifo(fdctrl, 1, 0);
1029 }
1030
1031 /* Seek to next sector */
1032 static int fdctrl_seek_to_next_sect(FDCtrl *fdctrl, FDrive *cur_drv)
1033 {
1034 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
1035 cur_drv->head, cur_drv->track, cur_drv->sect,
1036 fd_sector(cur_drv));
1037 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1038 error in fact */
1039 if (cur_drv->sect >= cur_drv->last_sect ||
1040 cur_drv->sect == fdctrl->eot) {
1041 cur_drv->sect = 1;
1042 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1043 if (cur_drv->head == 0 &&
1044 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1045 cur_drv->head = 1;
1046 } else {
1047 cur_drv->head = 0;
1048 cur_drv->track++;
1049 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1050 return 0;
1051 }
1052 } else {
1053 cur_drv->track++;
1054 return 0;
1055 }
1056 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1057 cur_drv->head, cur_drv->track,
1058 cur_drv->sect, fd_sector(cur_drv));
1059 } else {
1060 cur_drv->sect++;
1061 }
1062 return 1;
1063 }
1064
1065 /* Callback for transfer end (stop or abort) */
1066 static void fdctrl_stop_transfer(FDCtrl *fdctrl, uint8_t status0,
1067 uint8_t status1, uint8_t status2)
1068 {
1069 FDrive *cur_drv;
1070
1071 cur_drv = get_cur_drv(fdctrl);
1072 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
1073 status0, status1, status2,
1074 status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl));
1075 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
1076 fdctrl->fifo[1] = status1;
1077 fdctrl->fifo[2] = status2;
1078 fdctrl->fifo[3] = cur_drv->track;
1079 fdctrl->fifo[4] = cur_drv->head;
1080 fdctrl->fifo[5] = cur_drv->sect;
1081 fdctrl->fifo[6] = FD_SECTOR_SC;
1082 fdctrl->data_dir = FD_DIR_READ;
1083 if (!(fdctrl->msr & FD_MSR_NONDMA)) {
1084 DMA_release_DREQ(fdctrl->dma_chann);
1085 }
1086 fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
1087 fdctrl->msr &= ~FD_MSR_NONDMA;
1088 fdctrl_set_fifo(fdctrl, 7, 1);
1089 }
1090
1091 /* Prepare a data transfer (either DMA or FIFO) */
1092 static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction)
1093 {
1094 FDrive *cur_drv;
1095 uint8_t kh, kt, ks;
1096 int did_seek = 0;
1097
1098 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1099 cur_drv = get_cur_drv(fdctrl);
1100 kt = fdctrl->fifo[2];
1101 kh = fdctrl->fifo[3];
1102 ks = fdctrl->fifo[4];
1103 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
1104 GET_CUR_DRV(fdctrl), kh, kt, ks,
1105 fd_sector_calc(kh, kt, ks, cur_drv->last_sect));
1106 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1107 case 2:
1108 /* sect too big */
1109 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1110 fdctrl->fifo[3] = kt;
1111 fdctrl->fifo[4] = kh;
1112 fdctrl->fifo[5] = ks;
1113 return;
1114 case 3:
1115 /* track too big */
1116 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1117 fdctrl->fifo[3] = kt;
1118 fdctrl->fifo[4] = kh;
1119 fdctrl->fifo[5] = ks;
1120 return;
1121 case 4:
1122 /* No seek enabled */
1123 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1124 fdctrl->fifo[3] = kt;
1125 fdctrl->fifo[4] = kh;
1126 fdctrl->fifo[5] = ks;
1127 return;
1128 case 1:
1129 did_seek = 1;
1130 break;
1131 default:
1132 break;
1133 }
1134
1135 /* Set the FIFO state */
1136 fdctrl->data_dir = direction;
1137 fdctrl->data_pos = 0;
1138 fdctrl->msr |= FD_MSR_CMDBUSY;
1139 if (fdctrl->fifo[0] & 0x80)
1140 fdctrl->data_state |= FD_STATE_MULTI;
1141 else
1142 fdctrl->data_state &= ~FD_STATE_MULTI;
1143 if (did_seek)
1144 fdctrl->data_state |= FD_STATE_SEEK;
1145 else
1146 fdctrl->data_state &= ~FD_STATE_SEEK;
1147 if (fdctrl->fifo[5] == 00) {
1148 fdctrl->data_len = fdctrl->fifo[8];
1149 } else {
1150 int tmp;
1151 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1152 tmp = (fdctrl->fifo[6] - ks + 1);
1153 if (fdctrl->fifo[0] & 0x80)
1154 tmp += fdctrl->fifo[6];
1155 fdctrl->data_len *= tmp;
1156 }
1157 fdctrl->eot = fdctrl->fifo[6];
1158 if (fdctrl->dor & FD_DOR_DMAEN) {
1159 int dma_mode;
1160 /* DMA transfer are enabled. Check if DMA channel is well programmed */
1161 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1162 dma_mode = (dma_mode >> 2) & 3;
1163 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1164 dma_mode, direction,
1165 (128 << fdctrl->fifo[5]) *
1166 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1167 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1168 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1169 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1170 (direction == FD_DIR_READ && dma_mode == 1)) {
1171 /* No access is allowed until DMA transfer has completed */
1172 fdctrl->msr &= ~FD_MSR_RQM;
1173 /* Now, we just have to wait for the DMA controller to
1174 * recall us...
1175 */
1176 DMA_hold_DREQ(fdctrl->dma_chann);
1177 DMA_schedule(fdctrl->dma_chann);
1178 return;
1179 } else {
1180 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1181 }
1182 }
1183 FLOPPY_DPRINTF("start non-DMA transfer\n");
1184 fdctrl->msr |= FD_MSR_NONDMA;
1185 if (direction != FD_DIR_WRITE)
1186 fdctrl->msr |= FD_MSR_DIO;
1187 /* IO based transfer: calculate len */
1188 fdctrl_raise_irq(fdctrl, 0x00);
1189
1190 return;
1191 }
1192
1193 /* Prepare a transfer of deleted data */
1194 static void fdctrl_start_transfer_del(FDCtrl *fdctrl, int direction)
1195 {
1196 FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
1197
1198 /* We don't handle deleted data,
1199 * so we don't return *ANYTHING*
1200 */
1201 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1202 }
1203
1204 /* handlers for DMA transfers */
1205 static int fdctrl_transfer_handler (void *opaque, int nchan,
1206 int dma_pos, int dma_len)
1207 {
1208 FDCtrl *fdctrl;
1209 FDrive *cur_drv;
1210 int len, start_pos, rel_pos;
1211 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1212
1213 fdctrl = opaque;
1214 if (fdctrl->msr & FD_MSR_RQM) {
1215 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1216 return 0;
1217 }
1218 cur_drv = get_cur_drv(fdctrl);
1219 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1220 fdctrl->data_dir == FD_DIR_SCANH)
1221 status2 = FD_SR2_SNS;
1222 if (dma_len > fdctrl->data_len)
1223 dma_len = fdctrl->data_len;
1224 if (cur_drv->bs == NULL) {
1225 if (fdctrl->data_dir == FD_DIR_WRITE)
1226 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1227 else
1228 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1229 len = 0;
1230 goto transfer_error;
1231 }
1232 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1233 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1234 len = dma_len - fdctrl->data_pos;
1235 if (len + rel_pos > FD_SECTOR_LEN)
1236 len = FD_SECTOR_LEN - rel_pos;
1237 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1238 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1239 fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
1240 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1241 fd_sector(cur_drv) * FD_SECTOR_LEN);
1242 if (fdctrl->data_dir != FD_DIR_WRITE ||
1243 len < FD_SECTOR_LEN || rel_pos != 0) {
1244 /* READ & SCAN commands and realign to a sector for WRITE */
1245 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1246 fdctrl->fifo, 1) < 0) {
1247 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1248 fd_sector(cur_drv));
1249 /* Sure, image size is too small... */
1250 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1251 }
1252 }
1253 switch (fdctrl->data_dir) {
1254 case FD_DIR_READ:
1255 /* READ commands */
1256 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1257 fdctrl->data_pos, len);
1258 break;
1259 case FD_DIR_WRITE:
1260 /* WRITE commands */
1261 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1262 fdctrl->data_pos, len);
1263 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1264 fdctrl->fifo, 1) < 0) {
1265 FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
1266 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1267 goto transfer_error;
1268 }
1269 break;
1270 default:
1271 /* SCAN commands */
1272 {
1273 uint8_t tmpbuf[FD_SECTOR_LEN];
1274 int ret;
1275 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1276 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1277 if (ret == 0) {
1278 status2 = FD_SR2_SEH;
1279 goto end_transfer;
1280 }
1281 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1282 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1283 status2 = 0x00;
1284 goto end_transfer;
1285 }
1286 }
1287 break;
1288 }
1289 fdctrl->data_pos += len;
1290 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1291 if (rel_pos == 0) {
1292 /* Seek to next sector */
1293 if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
1294 break;
1295 }
1296 }
1297 end_transfer:
1298 len = fdctrl->data_pos - start_pos;
1299 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1300 fdctrl->data_pos, len, fdctrl->data_len);
1301 if (fdctrl->data_dir == FD_DIR_SCANE ||
1302 fdctrl->data_dir == FD_DIR_SCANL ||
1303 fdctrl->data_dir == FD_DIR_SCANH)
1304 status2 = FD_SR2_SEH;
1305 if (FD_DID_SEEK(fdctrl->data_state))
1306 status0 |= FD_SR0_SEEK;
1307 fdctrl->data_len -= len;
1308 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1309 transfer_error:
1310
1311 return len;
1312 }
1313
1314 /* Data register : 0x05 */
1315 static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
1316 {
1317 FDrive *cur_drv;
1318 uint32_t retval = 0;
1319 int pos;
1320
1321 cur_drv = get_cur_drv(fdctrl);
1322 fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1323 if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) {
1324 FLOPPY_ERROR("controller not ready for reading\n");
1325 return 0;
1326 }
1327 pos = fdctrl->data_pos;
1328 if (fdctrl->msr & FD_MSR_NONDMA) {
1329 pos %= FD_SECTOR_LEN;
1330 if (pos == 0) {
1331 if (fdctrl->data_pos != 0)
1332 if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
1333 FLOPPY_DPRINTF("error seeking to next sector %d\n",
1334 fd_sector(cur_drv));
1335 return 0;
1336 }
1337 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1338 FLOPPY_DPRINTF("error getting sector %d\n",
1339 fd_sector(cur_drv));
1340 /* Sure, image size is too small... */
1341 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1342 }
1343 }
1344 }
1345 retval = fdctrl->fifo[pos];
1346 if (++fdctrl->data_pos == fdctrl->data_len) {
1347 fdctrl->data_pos = 0;
1348 /* Switch from transfer mode to status mode
1349 * then from status mode to command mode
1350 */
1351 if (fdctrl->msr & FD_MSR_NONDMA) {
1352 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1353 } else {
1354 fdctrl_reset_fifo(fdctrl);
1355 fdctrl_reset_irq(fdctrl);
1356 }
1357 }
1358 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1359
1360 return retval;
1361 }
1362
1363 static void fdctrl_format_sector(FDCtrl *fdctrl)
1364 {
1365 FDrive *cur_drv;
1366 uint8_t kh, kt, ks;
1367
1368 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1369 cur_drv = get_cur_drv(fdctrl);
1370 kt = fdctrl->fifo[6];
1371 kh = fdctrl->fifo[7];
1372 ks = fdctrl->fifo[8];
1373 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1374 GET_CUR_DRV(fdctrl), kh, kt, ks,
1375 fd_sector_calc(kh, kt, ks, cur_drv->last_sect));
1376 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1377 case 2:
1378 /* sect too big */
1379 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1380 fdctrl->fifo[3] = kt;
1381 fdctrl->fifo[4] = kh;
1382 fdctrl->fifo[5] = ks;
1383 return;
1384 case 3:
1385 /* track too big */
1386 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1387 fdctrl->fifo[3] = kt;
1388 fdctrl->fifo[4] = kh;
1389 fdctrl->fifo[5] = ks;
1390 return;
1391 case 4:
1392 /* No seek enabled */
1393 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1394 fdctrl->fifo[3] = kt;
1395 fdctrl->fifo[4] = kh;
1396 fdctrl->fifo[5] = ks;
1397 return;
1398 case 1:
1399 fdctrl->data_state |= FD_STATE_SEEK;
1400 break;
1401 default:
1402 break;
1403 }
1404 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1405 if (cur_drv->bs == NULL ||
1406 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1407 FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1408 fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
1409 } else {
1410 if (cur_drv->sect == cur_drv->last_sect) {
1411 fdctrl->data_state &= ~FD_STATE_FORMAT;
1412 /* Last sector done */
1413 if (FD_DID_SEEK(fdctrl->data_state))
1414 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1415 else
1416 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1417 } else {
1418 /* More to do */
1419 fdctrl->data_pos = 0;
1420 fdctrl->data_len = 4;
1421 }
1422 }
1423 }
1424
1425 static void fdctrl_handle_lock(FDCtrl *fdctrl, int direction)
1426 {
1427 fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
1428 fdctrl->fifo[0] = fdctrl->lock << 4;
1429 fdctrl_set_fifo(fdctrl, 1, fdctrl->lock);
1430 }
1431
1432 static void fdctrl_handle_dumpreg(FDCtrl *fdctrl, int direction)
1433 {
1434 FDrive *cur_drv = get_cur_drv(fdctrl);
1435
1436 /* Drives position */
1437 fdctrl->fifo[0] = drv0(fdctrl)->track;
1438 fdctrl->fifo[1] = drv1(fdctrl)->track;
1439 #if MAX_FD == 4
1440 fdctrl->fifo[2] = drv2(fdctrl)->track;
1441 fdctrl->fifo[3] = drv3(fdctrl)->track;
1442 #else
1443 fdctrl->fifo[2] = 0;
1444 fdctrl->fifo[3] = 0;
1445 #endif
1446 /* timers */
1447 fdctrl->fifo[4] = fdctrl->timer0;
1448 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
1449 fdctrl->fifo[6] = cur_drv->last_sect;
1450 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1451 (cur_drv->perpendicular << 2);
1452 fdctrl->fifo[8] = fdctrl->config;
1453 fdctrl->fifo[9] = fdctrl->precomp_trk;
1454 fdctrl_set_fifo(fdctrl, 10, 0);
1455 }
1456
1457 static void fdctrl_handle_version(FDCtrl *fdctrl, int direction)
1458 {
1459 /* Controller's version */
1460 fdctrl->fifo[0] = fdctrl->version;
1461 fdctrl_set_fifo(fdctrl, 1, 1);
1462 }
1463
1464 static void fdctrl_handle_partid(FDCtrl *fdctrl, int direction)
1465 {
1466 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1467 fdctrl_set_fifo(fdctrl, 1, 0);
1468 }
1469
1470 static void fdctrl_handle_restore(FDCtrl *fdctrl, int direction)
1471 {
1472 FDrive *cur_drv = get_cur_drv(fdctrl);
1473
1474 /* Drives position */
1475 drv0(fdctrl)->track = fdctrl->fifo[3];
1476 drv1(fdctrl)->track = fdctrl->fifo[4];
1477 #if MAX_FD == 4
1478 drv2(fdctrl)->track = fdctrl->fifo[5];
1479 drv3(fdctrl)->track = fdctrl->fifo[6];
1480 #endif
1481 /* timers */
1482 fdctrl->timer0 = fdctrl->fifo[7];
1483 fdctrl->timer1 = fdctrl->fifo[8];
1484 cur_drv->last_sect = fdctrl->fifo[9];
1485 fdctrl->lock = fdctrl->fifo[10] >> 7;
1486 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1487 fdctrl->config = fdctrl->fifo[11];
1488 fdctrl->precomp_trk = fdctrl->fifo[12];
1489 fdctrl->pwrd = fdctrl->fifo[13];
1490 fdctrl_reset_fifo(fdctrl);
1491 }
1492
1493 static void fdctrl_handle_save(FDCtrl *fdctrl, int direction)
1494 {
1495 FDrive *cur_drv = get_cur_drv(fdctrl);
1496
1497 fdctrl->fifo[0] = 0;
1498 fdctrl->fifo[1] = 0;
1499 /* Drives position */
1500 fdctrl->fifo[2] = drv0(fdctrl)->track;
1501 fdctrl->fifo[3] = drv1(fdctrl)->track;
1502 #if MAX_FD == 4
1503 fdctrl->fifo[4] = drv2(fdctrl)->track;
1504 fdctrl->fifo[5] = drv3(fdctrl)->track;
1505 #else
1506 fdctrl->fifo[4] = 0;
1507 fdctrl->fifo[5] = 0;
1508 #endif
1509 /* timers */
1510 fdctrl->fifo[6] = fdctrl->timer0;
1511 fdctrl->fifo[7] = fdctrl->timer1;
1512 fdctrl->fifo[8] = cur_drv->last_sect;
1513 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1514 (cur_drv->perpendicular << 2);
1515 fdctrl->fifo[10] = fdctrl->config;
1516 fdctrl->fifo[11] = fdctrl->precomp_trk;
1517 fdctrl->fifo[12] = fdctrl->pwrd;
1518 fdctrl->fifo[13] = 0;
1519 fdctrl->fifo[14] = 0;
1520 fdctrl_set_fifo(fdctrl, 15, 1);
1521 }
1522
1523 static void fdctrl_handle_readid(FDCtrl *fdctrl, int direction)
1524 {
1525 FDrive *cur_drv = get_cur_drv(fdctrl);
1526
1527 /* XXX: should set main status register to busy */
1528 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1529 qemu_mod_timer(fdctrl->result_timer,
1530 qemu_get_clock(vm_clock) + (get_ticks_per_sec() / 50));
1531 }
1532
1533 static void fdctrl_handle_format_track(FDCtrl *fdctrl, int direction)
1534 {
1535 FDrive *cur_drv;
1536
1537 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1538 cur_drv = get_cur_drv(fdctrl);
1539 fdctrl->data_state |= FD_STATE_FORMAT;
1540 if (fdctrl->fifo[0] & 0x80)
1541 fdctrl->data_state |= FD_STATE_MULTI;
1542 else
1543 fdctrl->data_state &= ~FD_STATE_MULTI;
1544 fdctrl->data_state &= ~FD_STATE_SEEK;
1545 cur_drv->bps =
1546 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1547 #if 0
1548 cur_drv->last_sect =
1549 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1550 fdctrl->fifo[3] / 2;
1551 #else
1552 cur_drv->last_sect = fdctrl->fifo[3];
1553 #endif
1554 /* TODO: implement format using DMA expected by the Bochs BIOS
1555 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1556 * the sector with the specified fill byte
1557 */
1558 fdctrl->data_state &= ~FD_STATE_FORMAT;
1559 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1560 }
1561
1562 static void fdctrl_handle_specify(FDCtrl *fdctrl, int direction)
1563 {
1564 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1565 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1566 if (fdctrl->fifo[2] & 1)
1567 fdctrl->dor &= ~FD_DOR_DMAEN;
1568 else
1569 fdctrl->dor |= FD_DOR_DMAEN;
1570 /* No result back */
1571 fdctrl_reset_fifo(fdctrl);
1572 }
1573
1574 static void fdctrl_handle_sense_drive_status(FDCtrl *fdctrl, int direction)
1575 {
1576 FDrive *cur_drv;
1577
1578 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1579 cur_drv = get_cur_drv(fdctrl);
1580 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1581 /* 1 Byte status back */
1582 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1583 (cur_drv->track == 0 ? 0x10 : 0x00) |
1584 (cur_drv->head << 2) |
1585 GET_CUR_DRV(fdctrl) |
1586 0x28;
1587 fdctrl_set_fifo(fdctrl, 1, 0);
1588 }
1589
1590 static void fdctrl_handle_recalibrate(FDCtrl *fdctrl, int direction)
1591 {
1592 FDrive *cur_drv;
1593
1594 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1595 cur_drv = get_cur_drv(fdctrl);
1596 fd_recalibrate(cur_drv);
1597 fdctrl_reset_fifo(fdctrl);
1598 /* Raise Interrupt */
1599 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1600 }
1601
1602 static void fdctrl_handle_sense_interrupt_status(FDCtrl *fdctrl, int direction)
1603 {
1604 FDrive *cur_drv = get_cur_drv(fdctrl);
1605
1606 if(fdctrl->reset_sensei > 0) {
1607 fdctrl->fifo[0] =
1608 FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
1609 fdctrl->reset_sensei--;
1610 } else {
1611 /* XXX: status0 handling is broken for read/write
1612 commands, so we do this hack. It should be suppressed
1613 ASAP */
1614 fdctrl->fifo[0] =
1615 FD_SR0_SEEK | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
1616 }
1617
1618 fdctrl->fifo[1] = cur_drv->track;
1619 fdctrl_set_fifo(fdctrl, 2, 0);
1620 fdctrl_reset_irq(fdctrl);
1621 fdctrl->status0 = FD_SR0_RDYCHG;
1622 }
1623
1624 static void fdctrl_handle_seek(FDCtrl *fdctrl, int direction)
1625 {
1626 FDrive *cur_drv;
1627
1628 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1629 cur_drv = get_cur_drv(fdctrl);
1630 fdctrl_reset_fifo(fdctrl);
1631 if (fdctrl->fifo[2] > cur_drv->max_track) {
1632 fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK);
1633 } else {
1634 cur_drv->track = fdctrl->fifo[2];
1635 /* Raise Interrupt */
1636 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1637 }
1638 }
1639
1640 static void fdctrl_handle_perpendicular_mode(FDCtrl *fdctrl, int direction)
1641 {
1642 FDrive *cur_drv = get_cur_drv(fdctrl);
1643
1644 if (fdctrl->fifo[1] & 0x80)
1645 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1646 /* No result back */
1647 fdctrl_reset_fifo(fdctrl);
1648 }
1649
1650 static void fdctrl_handle_configure(FDCtrl *fdctrl, int direction)
1651 {
1652 fdctrl->config = fdctrl->fifo[2];
1653 fdctrl->precomp_trk = fdctrl->fifo[3];
1654 /* No result back */
1655 fdctrl_reset_fifo(fdctrl);
1656 }
1657
1658 static void fdctrl_handle_powerdown_mode(FDCtrl *fdctrl, int direction)
1659 {
1660 fdctrl->pwrd = fdctrl->fifo[1];
1661 fdctrl->fifo[0] = fdctrl->fifo[1];
1662 fdctrl_set_fifo(fdctrl, 1, 1);
1663 }
1664
1665 static void fdctrl_handle_option(FDCtrl *fdctrl, int direction)
1666 {
1667 /* No result back */
1668 fdctrl_reset_fifo(fdctrl);
1669 }
1670
1671 static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direction)
1672 {
1673 FDrive *cur_drv = get_cur_drv(fdctrl);
1674
1675 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1676 /* Command parameters done */
1677 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1678 fdctrl->fifo[0] = fdctrl->fifo[1];
1679 fdctrl->fifo[2] = 0;
1680 fdctrl->fifo[3] = 0;
1681 fdctrl_set_fifo(fdctrl, 4, 1);
1682 } else {
1683 fdctrl_reset_fifo(fdctrl);
1684 }
1685 } else if (fdctrl->data_len > 7) {
1686 /* ERROR */
1687 fdctrl->fifo[0] = 0x80 |
1688 (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
1689 fdctrl_set_fifo(fdctrl, 1, 1);
1690 }
1691 }
1692
1693 static void fdctrl_handle_relative_seek_out(FDCtrl *fdctrl, int direction)
1694 {
1695 FDrive *cur_drv;
1696
1697 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1698 cur_drv = get_cur_drv(fdctrl);
1699 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1700 cur_drv->track = cur_drv->max_track - 1;
1701 } else {
1702 cur_drv->track += fdctrl->fifo[2];
1703 }
1704 fdctrl_reset_fifo(fdctrl);
1705 /* Raise Interrupt */
1706 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1707 }
1708
1709 static void fdctrl_handle_relative_seek_in(FDCtrl *fdctrl, int direction)
1710 {
1711 FDrive *cur_drv;
1712
1713 SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1714 cur_drv = get_cur_drv(fdctrl);
1715 if (fdctrl->fifo[2] > cur_drv->track) {
1716 cur_drv->track = 0;
1717 } else {
1718 cur_drv->track -= fdctrl->fifo[2];
1719 }
1720 fdctrl_reset_fifo(fdctrl);
1721 /* Raise Interrupt */
1722 fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
1723 }
1724
1725 static const struct {
1726 uint8_t value;
1727 uint8_t mask;
1728 const char* name;
1729 int parameters;
1730 void (*handler)(FDCtrl *fdctrl, int direction);
1731 int direction;
1732 } handlers[] = {
1733 { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
1734 { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
1735 { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
1736 { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
1737 { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
1738 { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
1739 { FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
1740 { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
1741 { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
1742 { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
1743 { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
1744 { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
1745 { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
1746 { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
1747 { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
1748 { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
1749 { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
1750 { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
1751 { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
1752 { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
1753 { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
1754 { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
1755 { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command },
1756 { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
1757 { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
1758 { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
1759 { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
1760 { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
1761 { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
1762 { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
1763 { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
1764 { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
1765 };
1766 /* Associate command to an index in the 'handlers' array */
1767 static uint8_t command_to_handler[256];
1768
1769 static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
1770 {
1771 FDrive *cur_drv;
1772 int pos;
1773
1774 /* Reset mode */
1775 if (!(fdctrl->dor & FD_DOR_nRESET)) {
1776 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1777 return;
1778 }
1779 if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) {
1780 FLOPPY_ERROR("controller not ready for writing\n");
1781 return;
1782 }
1783 fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1784 /* Is it write command time ? */
1785 if (fdctrl->msr & FD_MSR_NONDMA) {
1786 /* FIFO data write */
1787 pos = fdctrl->data_pos++;
1788 pos %= FD_SECTOR_LEN;
1789 fdctrl->fifo[pos] = value;
1790 if (pos == FD_SECTOR_LEN - 1 ||
1791 fdctrl->data_pos == fdctrl->data_len) {
1792 cur_drv = get_cur_drv(fdctrl);
1793 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1794 FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
1795 return;
1796 }
1797 if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
1798 FLOPPY_DPRINTF("error seeking to next sector %d\n",
1799 fd_sector(cur_drv));
1800 return;
1801 }
1802 }
1803 /* Switch from transfer mode to status mode
1804 * then from status mode to command mode
1805 */
1806 if (fdctrl->data_pos == fdctrl->data_len)
1807 fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1808 return;
1809 }
1810 if (fdctrl->data_pos == 0) {
1811 /* Command */
1812 pos = command_to_handler[value & 0xff];
1813 FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
1814 fdctrl->data_len = handlers[pos].parameters + 1;
1815 }
1816
1817 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1818 fdctrl->fifo[fdctrl->data_pos++] = value;
1819 if (fdctrl->data_pos == fdctrl->data_len) {
1820 /* We now have all parameters
1821 * and will be able to treat the command
1822 */
1823 if (fdctrl->data_state & FD_STATE_FORMAT) {
1824 fdctrl_format_sector(fdctrl);
1825 return;
1826 }
1827
1828 pos = command_to_handler[fdctrl->fifo[0] & 0xff];
1829 FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
1830 (*handlers[pos].handler)(fdctrl, handlers[pos].direction);
1831 }
1832 }
1833
1834 static void fdctrl_result_timer(void *opaque)
1835 {
1836 FDCtrl *fdctrl = opaque;
1837 FDrive *cur_drv = get_cur_drv(fdctrl);
1838
1839 /* Pretend we are spinning.
1840 * This is needed for Coherent, which uses READ ID to check for
1841 * sector interleaving.
1842 */
1843 if (cur_drv->last_sect != 0) {
1844 cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
1845 }
1846 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1847 }
1848
1849 /* Init functions */
1850 static void fdctrl_connect_drives(FDCtrl *fdctrl)
1851 {
1852 unsigned int i;
1853
1854 for (i = 0; i < MAX_FD; i++) {
1855 fd_init(&fdctrl->drives[i]);
1856 fd_revalidate(&fdctrl->drives[i]);
1857 }
1858 }
1859
1860 FDCtrl *fdctrl_init_isa(DriveInfo **fds)
1861 {
1862 ISADevice *dev;
1863
1864 dev = isa_create("isa-fdc");
1865 if (fds[0]) {
1866 qdev_prop_set_drive(&dev->qdev, "driveA", fds[0]);
1867 }
1868 if (fds[1]) {
1869 qdev_prop_set_drive(&dev->qdev, "driveB", fds[1]);
1870 }
1871 if (qdev_init(&dev->qdev) < 0)
1872 return NULL;
1873 return &(DO_UPCAST(FDCtrlISABus, busdev, dev)->state);
1874 }
1875
1876 FDCtrl *fdctrl_init_sysbus(qemu_irq irq, int dma_chann,
1877 target_phys_addr_t mmio_base, DriveInfo **fds)
1878 {
1879 FDCtrl *fdctrl;
1880 DeviceState *dev;
1881 FDCtrlSysBus *sys;
1882
1883 dev = qdev_create(NULL, "sysbus-fdc");
1884 sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev);
1885 fdctrl = &sys->state;
1886 fdctrl->dma_chann = dma_chann; /* FIXME */
1887 if (fds[0]) {
1888 qdev_prop_set_drive(dev, "driveA", fds[0]);
1889 }
1890 if (fds[1]) {
1891 qdev_prop_set_drive(dev, "driveB", fds[1]);
1892 }
1893 qdev_init_nofail(dev);
1894 sysbus_connect_irq(&sys->busdev, 0, irq);
1895 sysbus_mmio_map(&sys->busdev, 0, mmio_base);
1896
1897 return fdctrl;
1898 }
1899
1900 FDCtrl *sun4m_fdctrl_init(qemu_irq irq, target_phys_addr_t io_base,
1901 DriveInfo **fds, qemu_irq *fdc_tc)
1902 {
1903 DeviceState *dev;
1904 FDCtrlSysBus *sys;
1905 FDCtrl *fdctrl;
1906
1907 dev = qdev_create(NULL, "SUNW,fdtwo");
1908 if (fds[0]) {
1909 qdev_prop_set_drive(dev, "drive", fds[0]);
1910 }
1911 qdev_init_nofail(dev);
1912 sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev);
1913 fdctrl = &sys->state;
1914 sysbus_connect_irq(&sys->busdev, 0, irq);
1915 sysbus_mmio_map(&sys->busdev, 0, io_base);
1916 *fdc_tc = qdev_get_gpio_in(dev, 0);
1917
1918 return fdctrl;
1919 }
1920
1921 static int fdctrl_init_common(FDCtrl *fdctrl, target_phys_addr_t io_base)
1922 {
1923 int i, j;
1924 static int command_tables_inited = 0;
1925
1926 /* Fill 'command_to_handler' lookup table */
1927 if (!command_tables_inited) {
1928 command_tables_inited = 1;
1929 for (i = ARRAY_SIZE(handlers) - 1; i >= 0; i--) {
1930 for (j = 0; j < sizeof(command_to_handler); j++) {
1931 if ((j & handlers[i].mask) == handlers[i].value) {
1932 command_to_handler[j] = i;
1933 }
1934 }
1935 }
1936 }
1937
1938 FLOPPY_DPRINTF("init controller\n");
1939 fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN);
1940 fdctrl->fifo_size = 512;
1941 fdctrl->result_timer = qemu_new_timer(vm_clock,
1942 fdctrl_result_timer, fdctrl);
1943
1944 fdctrl->version = 0x90; /* Intel 82078 controller */
1945 fdctrl->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
1946 fdctrl->num_floppies = MAX_FD;
1947
1948 if (fdctrl->dma_chann != -1)
1949 DMA_register_channel(fdctrl->dma_chann, &fdctrl_transfer_handler, fdctrl);
1950 fdctrl_connect_drives(fdctrl);
1951
1952 vmstate_register(io_base, &vmstate_fdc, fdctrl);
1953 return 0;
1954 }
1955
1956 static int isabus_fdc_init1(ISADevice *dev)
1957 {
1958 FDCtrlISABus *isa = DO_UPCAST(FDCtrlISABus, busdev, dev);
1959 FDCtrl *fdctrl = &isa->state;
1960 int iobase = 0x3f0;
1961 int isairq = 6;
1962 int dma_chann = 2;
1963 int ret;
1964
1965 register_ioport_read(iobase + 0x01, 5, 1,
1966 &fdctrl_read_port, fdctrl);
1967 register_ioport_read(iobase + 0x07, 1, 1,
1968 &fdctrl_read_port, fdctrl);
1969 register_ioport_write(iobase + 0x01, 5, 1,
1970 &fdctrl_write_port, fdctrl);
1971 register_ioport_write(iobase + 0x07, 1, 1,
1972 &fdctrl_write_port, fdctrl);
1973 isa_init_irq(&isa->busdev, &fdctrl->irq, isairq);
1974 fdctrl->dma_chann = dma_chann;
1975
1976 ret = fdctrl_init_common(fdctrl, iobase);
1977
1978 return ret;
1979 }
1980
1981 static int sysbus_fdc_init1(SysBusDevice *dev)
1982 {
1983 FDCtrlSysBus *sys = DO_UPCAST(FDCtrlSysBus, busdev, dev);
1984 FDCtrl *fdctrl = &sys->state;
1985 int io;
1986 int ret;
1987
1988 io = cpu_register_io_memory(fdctrl_mem_read, fdctrl_mem_write, fdctrl);
1989 sysbus_init_mmio(dev, 0x08, io);
1990 sysbus_init_irq(dev, &fdctrl->irq);
1991 qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1);
1992 fdctrl->dma_chann = -1;
1993
1994 ret = fdctrl_init_common(fdctrl, io);
1995
1996 return ret;
1997 }
1998
1999 static int sun4m_fdc_init1(SysBusDevice *dev)
2000 {
2001 FDCtrl *fdctrl = &(FROM_SYSBUS(FDCtrlSysBus, dev)->state);
2002 int io;
2003
2004 io = cpu_register_io_memory(fdctrl_mem_read_strict,
2005 fdctrl_mem_write_strict, fdctrl);
2006 sysbus_init_mmio(dev, 0x08, io);
2007 sysbus_init_irq(dev, &fdctrl->irq);
2008 qdev_init_gpio_in(&dev->qdev, fdctrl_handle_tc, 1);
2009
2010 fdctrl->sun4m = 1;
2011 return fdctrl_init_common(fdctrl, io);
2012 }
2013
2014 static ISADeviceInfo isa_fdc_info = {
2015 .init = isabus_fdc_init1,
2016 .qdev.name = "isa-fdc",
2017 .qdev.size = sizeof(FDCtrlISABus),
2018 .qdev.no_user = 1,
2019 .qdev.reset = fdctrl_external_reset_isa,
2020 .qdev.props = (Property[]) {
2021 DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].dinfo),
2022 DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].dinfo),
2023 DEFINE_PROP_END_OF_LIST(),
2024 },
2025 };
2026
2027 static SysBusDeviceInfo sysbus_fdc_info = {
2028 .init = sysbus_fdc_init1,
2029 .qdev.name = "sysbus-fdc",
2030 .qdev.size = sizeof(FDCtrlSysBus),
2031 .qdev.reset = fdctrl_external_reset_sysbus,
2032 .qdev.props = (Property[]) {
2033 DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].dinfo),
2034 DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].dinfo),
2035 DEFINE_PROP_END_OF_LIST(),
2036 },
2037 };
2038
2039 static SysBusDeviceInfo sun4m_fdc_info = {
2040 .init = sun4m_fdc_init1,
2041 .qdev.name = "SUNW,fdtwo",
2042 .qdev.size = sizeof(FDCtrlSysBus),
2043 .qdev.reset = fdctrl_external_reset_sysbus,
2044 .qdev.props = (Property[]) {
2045 DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].dinfo),
2046 DEFINE_PROP_END_OF_LIST(),
2047 },
2048 };
2049
2050 static void fdc_register_devices(void)
2051 {
2052 isa_qdev_register(&isa_fdc_info);
2053 sysbus_register_withprop(&sysbus_fdc_info);
2054 sysbus_register_withprop(&sun4m_fdc_info);
2055 }
2056
2057 device_init(fdc_register_devices)
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