2 * QEMU Floppy disk emulator (Intel 82078)
4 * Copyright (c) 2003, 2007 Jocelyn Mayer
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
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.
30 /********************************************************/
31 /* debug Floppy devices */
32 //#define DEBUG_FLOPPY
35 #define FLOPPY_DPRINTF(fmt, args...) \
36 do { printf("FLOPPY: " fmt , ##args); } while (0)
38 #define FLOPPY_DPRINTF(fmt, args...)
41 #define FLOPPY_ERROR(fmt, args...) \
42 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
44 /********************************************************/
45 /* Floppy drive emulation */
47 /* Will always be a fixed parameter for us */
48 #define FD_SECTOR_LEN 512
49 #define FD_SECTOR_SC 2 /* Sector size code */
51 /* Floppy disk drive emulation */
52 typedef enum fdisk_type_t {
53 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
54 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
55 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
56 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
57 FDRIVE_DISK_NONE = 0x05, /* No disk */
60 typedef enum fdrive_type_t {
61 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
62 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
63 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
64 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
67 typedef enum fdrive_flags_t {
68 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
71 typedef enum fdisk_flags_t {
72 FDISK_DBL_SIDES = 0x01,
75 typedef struct fdrive_t {
79 fdrive_flags_t drflags;
80 uint8_t perpendicular; /* 2.88 MB access mode */
85 /* Last operation status */
86 uint8_t dir; /* Direction */
87 uint8_t rw; /* Read/write */
90 uint8_t last_sect; /* Nb sector per track */
91 uint8_t max_track; /* Nb of tracks */
92 uint16_t bps; /* Bytes per sector */
93 uint8_t ro; /* Is read-only */
96 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
100 drv->drive = FDRIVE_DRV_NONE;
102 drv->perpendicular = 0;
108 static int _fd_sector (uint8_t head, uint8_t track,
109 uint8_t sect, uint8_t last_sect)
111 return (((track * 2) + head) * last_sect) + sect - 1;
114 /* Returns current position, in sectors, for given drive */
115 static int fd_sector (fdrive_t *drv)
117 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
120 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
126 if (track > drv->max_track ||
127 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
128 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
129 head, track, sect, 1,
130 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
131 drv->max_track, drv->last_sect);
134 if (sect > drv->last_sect) {
135 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
136 head, track, sect, 1,
137 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
138 drv->max_track, drv->last_sect);
141 sector = _fd_sector(head, track, sect, drv->last_sect);
143 if (sector != fd_sector(drv)) {
146 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
147 head, track, sect, 1, drv->max_track, drv->last_sect);
152 if (drv->track != track)
161 /* Set drive back to track 0 */
162 static void fd_recalibrate (fdrive_t *drv)
164 FLOPPY_DPRINTF("recalibrate\n");
172 /* Recognize floppy formats */
173 typedef struct fd_format_t {
179 const unsigned char *str;
182 static fd_format_t fd_formats[] = {
183 /* First entry is default format */
184 /* 1.44 MB 3"1/2 floppy disks */
185 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
186 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
187 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
188 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
189 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
190 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
191 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
192 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
193 /* 2.88 MB 3"1/2 floppy disks */
194 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
195 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
196 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
197 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
198 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
199 /* 720 kB 3"1/2 floppy disks */
200 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
201 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
202 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
203 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
204 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
205 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
206 /* 1.2 MB 5"1/4 floppy disks */
207 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
208 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
209 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
210 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
211 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
212 /* 720 kB 5"1/4 floppy disks */
213 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
214 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
215 /* 360 kB 5"1/4 floppy disks */
216 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
217 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
219 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
220 /* 320 kB 5"1/4 floppy disks */
221 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
222 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
223 /* 360 kB must match 5"1/4 better than 3"1/2... */
224 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
226 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
229 /* Revalidate a disk drive after a disk change */
230 static void fd_revalidate (fdrive_t *drv)
233 int64_t nb_sectors, size;
234 int i, first_match, match;
235 int nb_heads, max_track, last_sect, ro;
237 FLOPPY_DPRINTF("revalidate\n");
238 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
239 ro = bdrv_is_read_only(drv->bs);
240 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
241 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
242 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
243 nb_heads - 1, max_track, last_sect);
245 bdrv_get_geometry(drv->bs, &nb_sectors);
249 parse = &fd_formats[i];
250 if (parse->drive == FDRIVE_DRV_NONE)
252 if (drv->drive == parse->drive ||
253 drv->drive == FDRIVE_DRV_NONE) {
254 size = (parse->max_head + 1) * parse->max_track *
256 if (nb_sectors == size) {
260 if (first_match == -1)
265 if (first_match == -1)
269 parse = &fd_formats[match];
271 nb_heads = parse->max_head + 1;
272 max_track = parse->max_track;
273 last_sect = parse->last_sect;
274 drv->drive = parse->drive;
275 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
276 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
279 drv->flags &= ~FDISK_DBL_SIDES;
281 drv->flags |= FDISK_DBL_SIDES;
283 drv->max_track = max_track;
284 drv->last_sect = last_sect;
287 FLOPPY_DPRINTF("No disk in drive\n");
290 drv->flags &= ~FDISK_DBL_SIDES;
295 static void fd_start (fdrive_t *drv)
297 drv->drflags |= FDRIVE_MOTOR_ON;
300 static void fd_stop (fdrive_t *drv)
302 drv->drflags &= ~FDRIVE_MOTOR_ON;
305 /* Re-initialise a drives (motor off, repositioned) */
306 static void fd_reset (fdrive_t *drv)
312 /********************************************************/
313 /* Intel 82078 floppy disk controller emulation */
315 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
316 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
317 static int fdctrl_transfer_handler (void *opaque, int nchan,
318 int dma_pos, int dma_len);
319 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
320 static void fdctrl_result_timer(void *opaque);
322 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
323 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
324 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
325 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
326 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
327 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
328 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
329 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
330 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
331 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
334 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
335 FD_CTRL_RESET = 0x02,
336 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
337 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
351 FD_STATE_STATUS = 0x01,
352 FD_STATE_DATA = 0x02,
353 FD_STATE_STATE = 0x03,
354 FD_STATE_MULTI = 0x10,
355 FD_STATE_SEEK = 0x20,
356 FD_STATE_FORMAT = 0x40,
359 #define FD_STATE(state) ((state) & FD_STATE_STATE)
360 #define FD_SET_STATE(state, new_state) \
361 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
362 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
363 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
364 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
368 /* Controller's identification */
374 /* Controller state */
375 QEMUTimer *result_timer;
381 uint8_t fifo[FD_SECTOR_LEN];
387 uint8_t eot; /* last wanted sector */
388 /* States kept only to be returned back */
392 /* precompensation */
396 /* Power down config (also with status regB access mode */
402 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
404 fdctrl_t *fdctrl = opaque;
407 switch (reg & 0x07) {
410 // Identify to Linux as S82078B
411 retval = fdctrl_read_statusB(fdctrl);
415 retval = fdctrl_read_statusB(fdctrl);
418 retval = fdctrl_read_dor(fdctrl);
421 retval = fdctrl_read_tape(fdctrl);
424 retval = fdctrl_read_main_status(fdctrl);
427 retval = fdctrl_read_data(fdctrl);
430 retval = fdctrl_read_dir(fdctrl);
433 retval = (uint32_t)(-1);
436 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
441 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
443 fdctrl_t *fdctrl = opaque;
445 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
447 switch (reg & 0x07) {
449 fdctrl_write_dor(fdctrl, value);
452 fdctrl_write_tape(fdctrl, value);
455 fdctrl_write_rate(fdctrl, value);
458 fdctrl_write_data(fdctrl, value);
465 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
467 return fdctrl_read(opaque, reg);
470 static void fdctrl_write_mem (void *opaque,
471 target_phys_addr_t reg, uint32_t value)
473 fdctrl_write(opaque, reg, value);
476 static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
482 static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
488 static void fd_save (QEMUFile *f, fdrive_t *fd)
493 qemu_put_8s(f, &tmp);
494 qemu_put_8s(f, &fd->head);
495 qemu_put_8s(f, &fd->track);
496 qemu_put_8s(f, &fd->sect);
497 qemu_put_8s(f, &fd->dir);
498 qemu_put_8s(f, &fd->rw);
501 static void fdc_save (QEMUFile *f, void *opaque)
503 fdctrl_t *s = opaque;
505 qemu_put_8s(f, &s->state);
506 qemu_put_8s(f, &s->dma_en);
507 qemu_put_8s(f, &s->cur_drv);
508 qemu_put_8s(f, &s->bootsel);
509 qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN);
510 qemu_put_be32s(f, &s->data_pos);
511 qemu_put_be32s(f, &s->data_len);
512 qemu_put_8s(f, &s->data_state);
513 qemu_put_8s(f, &s->data_dir);
514 qemu_put_8s(f, &s->int_status);
515 qemu_put_8s(f, &s->eot);
516 qemu_put_8s(f, &s->timer0);
517 qemu_put_8s(f, &s->timer1);
518 qemu_put_8s(f, &s->precomp_trk);
519 qemu_put_8s(f, &s->config);
520 qemu_put_8s(f, &s->lock);
521 qemu_put_8s(f, &s->pwrd);
522 fd_save(f, &s->drives[0]);
523 fd_save(f, &s->drives[1]);
526 static int fd_load (QEMUFile *f, fdrive_t *fd)
530 qemu_get_8s(f, &tmp);
532 qemu_get_8s(f, &fd->head);
533 qemu_get_8s(f, &fd->track);
534 qemu_get_8s(f, &fd->sect);
535 qemu_get_8s(f, &fd->dir);
536 qemu_get_8s(f, &fd->rw);
541 static int fdc_load (QEMUFile *f, void *opaque, int version_id)
543 fdctrl_t *s = opaque;
549 qemu_get_8s(f, &s->state);
550 qemu_get_8s(f, &s->dma_en);
551 qemu_get_8s(f, &s->cur_drv);
552 qemu_get_8s(f, &s->bootsel);
553 qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN);
554 qemu_get_be32s(f, &s->data_pos);
555 qemu_get_be32s(f, &s->data_len);
556 qemu_get_8s(f, &s->data_state);
557 qemu_get_8s(f, &s->data_dir);
558 qemu_get_8s(f, &s->int_status);
559 qemu_get_8s(f, &s->eot);
560 qemu_get_8s(f, &s->timer0);
561 qemu_get_8s(f, &s->timer1);
562 qemu_get_8s(f, &s->precomp_trk);
563 qemu_get_8s(f, &s->config);
564 qemu_get_8s(f, &s->lock);
565 qemu_get_8s(f, &s->pwrd);
567 ret = fd_load(f, &s->drives[0]);
569 ret = fd_load(f, &s->drives[1]);
574 static void fdctrl_external_reset(void *opaque)
576 fdctrl_t *s = opaque;
581 fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
583 BlockDriverState **fds)
589 FLOPPY_DPRINTF("init controller\n");
590 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
593 fdctrl->result_timer = qemu_new_timer(vm_clock,
594 fdctrl_result_timer, fdctrl);
596 fdctrl->version = 0x90; /* Intel 82078 controller */
598 fdctrl->dma_chann = dma_chann;
599 fdctrl->io_base = io_base;
600 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
601 if (fdctrl->dma_chann != -1) {
603 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
607 for (i = 0; i < 2; i++) {
608 fd_init(&fdctrl->drives[i], fds[i]);
610 fdctrl_reset(fdctrl, 0);
611 fdctrl->state = FD_CTRL_ACTIVE;
613 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write, fdctrl);
614 cpu_register_physical_memory(io_base, 0x08, io_mem);
616 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
617 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
618 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
619 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
621 register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl);
622 qemu_register_reset(fdctrl_external_reset, fdctrl);
623 for (i = 0; i < 2; i++) {
624 fd_revalidate(&fdctrl->drives[i]);
630 /* XXX: may change if moved to bdrv */
631 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
633 return fdctrl->drives[drive_num].drive;
636 /* Change IRQ state */
637 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
639 FLOPPY_DPRINTF("Reset interrupt\n");
640 qemu_set_irq(fdctrl->irq, 0);
641 fdctrl->state &= ~FD_CTRL_INTR;
644 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
648 if (!fdctrl->dma_en) {
649 fdctrl->state &= ~FD_CTRL_BUSY;
650 fdctrl->int_status = status;
654 if (~(fdctrl->state & FD_CTRL_INTR)) {
655 qemu_set_irq(fdctrl->irq, 1);
656 fdctrl->state |= FD_CTRL_INTR;
658 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
659 fdctrl->int_status = status;
662 /* Reset controller */
663 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
667 FLOPPY_DPRINTF("reset controller\n");
668 fdctrl_reset_irq(fdctrl);
669 /* Initialise controller */
672 fdctrl->data_pos = 0;
673 fdctrl->data_len = 0;
674 fdctrl->data_state = FD_STATE_CMD;
675 fdctrl->data_dir = FD_DIR_WRITE;
676 for (i = 0; i < MAX_FD; i++)
677 fd_reset(&fdctrl->drives[i]);
678 fdctrl_reset_fifo(fdctrl);
680 fdctrl_raise_irq(fdctrl, 0xc0);
683 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
685 return &fdctrl->drives[fdctrl->bootsel];
688 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
690 return &fdctrl->drives[1 - fdctrl->bootsel];
693 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
695 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
698 /* Status B register : 0x01 (read-only) */
699 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
701 FLOPPY_DPRINTF("status register: 0x00\n");
705 /* Digital output register : 0x02 */
706 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
710 /* Drive motors state indicators */
711 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
713 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
716 retval |= fdctrl->dma_en << 3;
717 /* Reset indicator */
718 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
720 retval |= fdctrl->cur_drv;
721 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
726 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
729 if (fdctrl->state & FD_CTRL_RESET) {
730 if (!(value & 0x04)) {
731 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
735 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
736 /* Drive motors state indicators */
738 fd_start(drv1(fdctrl));
740 fd_stop(drv1(fdctrl));
742 fd_start(drv0(fdctrl));
744 fd_stop(drv0(fdctrl));
747 if (fdctrl->dma_chann != -1)
748 fdctrl->dma_en = 1 - ((value >> 3) & 1);
751 if (!(value & 0x04)) {
752 if (!(fdctrl->state & FD_CTRL_RESET)) {
753 FLOPPY_DPRINTF("controller enter RESET state\n");
754 fdctrl->state |= FD_CTRL_RESET;
757 if (fdctrl->state & FD_CTRL_RESET) {
758 FLOPPY_DPRINTF("controller out of RESET state\n");
759 fdctrl_reset(fdctrl, 1);
760 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
764 fdctrl->cur_drv = value & 1;
767 /* Tape drive register : 0x03 */
768 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
772 /* Disk boot selection indicator */
773 retval |= fdctrl->bootsel << 2;
774 /* Tape indicators: never allowed */
775 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
780 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
783 if (fdctrl->state & FD_CTRL_RESET) {
784 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
787 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
788 /* Disk boot selection indicator */
789 fdctrl->bootsel = (value >> 2) & 1;
790 /* Tape indicators: never allow */
793 /* Main status register : 0x04 (read) */
794 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
798 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
799 if (!(fdctrl->state & FD_CTRL_BUSY)) {
800 /* Data transfer allowed */
802 /* Data transfer direction indicator */
803 if (fdctrl->data_dir == FD_DIR_READ)
806 /* Should handle 0x20 for SPECIFY command */
807 /* Command busy indicator */
808 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
809 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
811 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
816 /* Data select rate register : 0x04 (write) */
817 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
820 if (fdctrl->state & FD_CTRL_RESET) {
821 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
824 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
825 /* Reset: autoclear */
827 fdctrl->state |= FD_CTRL_RESET;
828 fdctrl_reset(fdctrl, 1);
829 fdctrl->state &= ~FD_CTRL_RESET;
832 fdctrl->state |= FD_CTRL_SLEEP;
833 fdctrl_reset(fdctrl, 1);
835 // fdctrl.precomp = (value >> 2) & 0x07;
838 static int fdctrl_media_changed(fdrive_t *drv)
843 ret = bdrv_media_changed(drv->bs);
850 /* Digital input register : 0x07 (read-only) */
851 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
855 if (fdctrl_media_changed(drv0(fdctrl)) ||
856 fdctrl_media_changed(drv1(fdctrl)))
859 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
864 /* FIFO state control */
865 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
867 fdctrl->data_dir = FD_DIR_WRITE;
868 fdctrl->data_pos = 0;
869 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
872 /* Set FIFO status for the host to read */
873 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
875 fdctrl->data_dir = FD_DIR_READ;
876 fdctrl->data_len = fifo_len;
877 fdctrl->data_pos = 0;
878 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
880 fdctrl_raise_irq(fdctrl, 0x00);
883 /* Set an error: unimplemented/unknown command */
884 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
889 cur_drv = get_cur_drv(fdctrl);
890 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
891 fdctrl->fifo[1] = 0x00;
892 fdctrl->fifo[2] = 0x00;
893 fdctrl_set_fifo(fdctrl, 3, 1);
895 // fdctrl_reset_fifo(fdctrl);
896 fdctrl->fifo[0] = 0x80;
897 fdctrl_set_fifo(fdctrl, 1, 0);
901 /* Callback for transfer end (stop or abort) */
902 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
903 uint8_t status1, uint8_t status2)
907 cur_drv = get_cur_drv(fdctrl);
908 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
909 status0, status1, status2,
910 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
911 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
912 fdctrl->fifo[1] = status1;
913 fdctrl->fifo[2] = status2;
914 fdctrl->fifo[3] = cur_drv->track;
915 fdctrl->fifo[4] = cur_drv->head;
916 fdctrl->fifo[5] = cur_drv->sect;
917 fdctrl->fifo[6] = FD_SECTOR_SC;
918 fdctrl->data_dir = FD_DIR_READ;
919 if (fdctrl->state & FD_CTRL_BUSY) {
920 DMA_release_DREQ(fdctrl->dma_chann);
921 fdctrl->state &= ~FD_CTRL_BUSY;
923 fdctrl_set_fifo(fdctrl, 7, 1);
926 /* Prepare a data transfer (either DMA or FIFO) */
927 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
933 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
934 cur_drv = get_cur_drv(fdctrl);
935 kt = fdctrl->fifo[2];
936 kh = fdctrl->fifo[3];
937 ks = fdctrl->fifo[4];
938 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
939 fdctrl->cur_drv, kh, kt, ks,
940 _fd_sector(kh, kt, ks, cur_drv->last_sect));
942 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
945 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
946 fdctrl->fifo[3] = kt;
947 fdctrl->fifo[4] = kh;
948 fdctrl->fifo[5] = ks;
952 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
953 fdctrl->fifo[3] = kt;
954 fdctrl->fifo[4] = kh;
955 fdctrl->fifo[5] = ks;
958 /* No seek enabled */
959 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
960 fdctrl->fifo[3] = kt;
961 fdctrl->fifo[4] = kh;
962 fdctrl->fifo[5] = ks;
970 /* Set the FIFO state */
971 fdctrl->data_dir = direction;
972 fdctrl->data_pos = 0;
973 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
974 if (fdctrl->fifo[0] & 0x80)
975 fdctrl->data_state |= FD_STATE_MULTI;
977 fdctrl->data_state &= ~FD_STATE_MULTI;
979 fdctrl->data_state |= FD_STATE_SEEK;
981 fdctrl->data_state &= ~FD_STATE_SEEK;
982 if (fdctrl->fifo[5] == 00) {
983 fdctrl->data_len = fdctrl->fifo[8];
986 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
987 tmp = (cur_drv->last_sect - ks + 1);
988 if (fdctrl->fifo[0] & 0x80)
989 tmp += cur_drv->last_sect;
990 fdctrl->data_len *= tmp;
992 fdctrl->eot = fdctrl->fifo[6];
993 if (fdctrl->dma_en) {
995 /* DMA transfer are enabled. Check if DMA channel is well programmed */
996 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
997 dma_mode = (dma_mode >> 2) & 3;
998 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1000 (128 << fdctrl->fifo[5]) *
1001 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1002 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1003 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1004 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1005 (direction == FD_DIR_READ && dma_mode == 1)) {
1006 /* No access is allowed until DMA transfer has completed */
1007 fdctrl->state |= FD_CTRL_BUSY;
1008 /* Now, we just have to wait for the DMA controller to
1011 DMA_hold_DREQ(fdctrl->dma_chann);
1012 DMA_schedule(fdctrl->dma_chann);
1015 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1018 FLOPPY_DPRINTF("start non-DMA transfer\n");
1019 /* IO based transfer: calculate len */
1020 fdctrl_raise_irq(fdctrl, 0x00);
1025 /* Prepare a transfer of deleted data */
1026 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1028 /* We don't handle deleted data,
1029 * so we don't return *ANYTHING*
1031 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1034 /* handlers for DMA transfers */
1035 static int fdctrl_transfer_handler (void *opaque, int nchan,
1036 int dma_pos, int dma_len)
1040 int len, start_pos, rel_pos;
1041 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1044 if (!(fdctrl->state & FD_CTRL_BUSY)) {
1045 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1048 cur_drv = get_cur_drv(fdctrl);
1049 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1050 fdctrl->data_dir == FD_DIR_SCANH)
1052 if (dma_len > fdctrl->data_len)
1053 dma_len = fdctrl->data_len;
1054 if (cur_drv->bs == NULL) {
1055 if (fdctrl->data_dir == FD_DIR_WRITE)
1056 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1058 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1060 goto transfer_error;
1062 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1063 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1064 len = dma_len - fdctrl->data_pos;
1065 if (len + rel_pos > FD_SECTOR_LEN)
1066 len = FD_SECTOR_LEN - rel_pos;
1067 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1068 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1069 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1070 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1071 fd_sector(cur_drv) * 512);
1072 if (fdctrl->data_dir != FD_DIR_WRITE ||
1073 len < FD_SECTOR_LEN || rel_pos != 0) {
1074 /* READ & SCAN commands and realign to a sector for WRITE */
1075 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1076 fdctrl->fifo, 1) < 0) {
1077 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1078 fd_sector(cur_drv));
1079 /* Sure, image size is too small... */
1080 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1083 switch (fdctrl->data_dir) {
1086 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1087 fdctrl->data_pos, len);
1088 /* cpu_physical_memory_write(addr + fdctrl->data_pos, */
1089 /* fdctrl->fifo + rel_pos, len); */
1092 /* WRITE commands */
1093 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1094 fdctrl->data_pos, len);
1095 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1096 /* fdctrl->fifo + rel_pos, len); */
1097 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1098 fdctrl->fifo, 1) < 0) {
1099 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1100 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1101 goto transfer_error;
1107 uint8_t tmpbuf[FD_SECTOR_LEN];
1109 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1110 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1112 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1117 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1118 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1125 fdctrl->data_pos += len;
1126 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1128 /* Seek to next sector */
1129 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1130 cur_drv->head, cur_drv->track, cur_drv->sect,
1132 fdctrl->data_pos - len);
1133 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1135 if (cur_drv->sect >= cur_drv->last_sect ||
1136 cur_drv->sect == fdctrl->eot) {
1138 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1139 if (cur_drv->head == 0 &&
1140 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1145 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1152 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1153 cur_drv->head, cur_drv->track,
1154 cur_drv->sect, fd_sector(cur_drv));
1161 len = fdctrl->data_pos - start_pos;
1162 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1163 fdctrl->data_pos, len, fdctrl->data_len);
1164 if (fdctrl->data_dir == FD_DIR_SCANE ||
1165 fdctrl->data_dir == FD_DIR_SCANL ||
1166 fdctrl->data_dir == FD_DIR_SCANH)
1168 if (FD_DID_SEEK(fdctrl->data_state))
1170 fdctrl->data_len -= len;
1171 // if (fdctrl->data_len == 0)
1172 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1178 /* Data register : 0x05 */
1179 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1182 uint32_t retval = 0;
1185 cur_drv = get_cur_drv(fdctrl);
1186 fdctrl->state &= ~FD_CTRL_SLEEP;
1187 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1188 FLOPPY_ERROR("can't read data in CMD state\n");
1191 pos = fdctrl->data_pos;
1192 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1193 pos %= FD_SECTOR_LEN;
1195 len = fdctrl->data_len - fdctrl->data_pos;
1196 if (len > FD_SECTOR_LEN)
1197 len = FD_SECTOR_LEN;
1198 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1202 retval = fdctrl->fifo[pos];
1203 if (++fdctrl->data_pos == fdctrl->data_len) {
1204 fdctrl->data_pos = 0;
1205 /* Switch from transfer mode to status mode
1206 * then from status mode to command mode
1208 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1209 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1211 fdctrl_reset_fifo(fdctrl);
1212 fdctrl_reset_irq(fdctrl);
1215 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1220 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1226 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1227 cur_drv = get_cur_drv(fdctrl);
1228 kt = fdctrl->fifo[6];
1229 kh = fdctrl->fifo[7];
1230 ks = fdctrl->fifo[8];
1231 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1232 fdctrl->cur_drv, kh, kt, ks,
1233 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1235 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1238 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1239 fdctrl->fifo[3] = kt;
1240 fdctrl->fifo[4] = kh;
1241 fdctrl->fifo[5] = ks;
1245 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1246 fdctrl->fifo[3] = kt;
1247 fdctrl->fifo[4] = kh;
1248 fdctrl->fifo[5] = ks;
1251 /* No seek enabled */
1252 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1253 fdctrl->fifo[3] = kt;
1254 fdctrl->fifo[4] = kh;
1255 fdctrl->fifo[5] = ks;
1259 fdctrl->data_state |= FD_STATE_SEEK;
1264 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1265 if (cur_drv->bs == NULL ||
1266 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1267 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1268 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1270 if (cur_drv->sect == cur_drv->last_sect) {
1271 fdctrl->data_state &= ~FD_STATE_FORMAT;
1272 /* Last sector done */
1273 if (FD_DID_SEEK(fdctrl->data_state))
1274 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1276 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1279 fdctrl->data_pos = 0;
1280 fdctrl->data_len = 4;
1285 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1289 cur_drv = get_cur_drv(fdctrl);
1291 if (fdctrl->state & FD_CTRL_RESET) {
1292 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1295 fdctrl->state &= ~FD_CTRL_SLEEP;
1296 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1297 FLOPPY_ERROR("can't write data in status mode\n");
1300 /* Is it write command time ? */
1301 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1302 /* FIFO data write */
1303 fdctrl->fifo[fdctrl->data_pos++] = value;
1304 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1305 fdctrl->data_pos == fdctrl->data_len) {
1306 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1307 fdctrl->fifo, FD_SECTOR_LEN);
1309 /* Switch from transfer mode to status mode
1310 * then from status mode to command mode
1312 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1313 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1316 if (fdctrl->data_pos == 0) {
1318 switch (value & 0x5F) {
1321 FLOPPY_DPRINTF("READ command\n");
1322 /* 8 parameters cmd */
1323 fdctrl->data_len = 9;
1326 /* READ_DELETED variants */
1327 FLOPPY_DPRINTF("READ_DELETED command\n");
1328 /* 8 parameters cmd */
1329 fdctrl->data_len = 9;
1332 /* SCAN_EQUAL variants */
1333 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1334 /* 8 parameters cmd */
1335 fdctrl->data_len = 9;
1338 /* VERIFY variants */
1339 FLOPPY_DPRINTF("VERIFY command\n");
1340 /* 8 parameters cmd */
1341 fdctrl->data_len = 9;
1344 /* SCAN_LOW_OR_EQUAL variants */
1345 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1346 /* 8 parameters cmd */
1347 fdctrl->data_len = 9;
1350 /* SCAN_HIGH_OR_EQUAL variants */
1351 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1352 /* 8 parameters cmd */
1353 fdctrl->data_len = 9;
1358 switch (value & 0x7F) {
1360 /* WRITE variants */
1361 FLOPPY_DPRINTF("WRITE command\n");
1362 /* 8 parameters cmd */
1363 fdctrl->data_len = 9;
1366 /* WRITE_DELETED variants */
1367 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1368 /* 8 parameters cmd */
1369 fdctrl->data_len = 9;
1377 FLOPPY_DPRINTF("SPECIFY command\n");
1378 /* 1 parameter cmd */
1379 fdctrl->data_len = 3;
1382 /* SENSE_DRIVE_STATUS */
1383 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1384 /* 1 parameter cmd */
1385 fdctrl->data_len = 2;
1389 FLOPPY_DPRINTF("RECALIBRATE command\n");
1390 /* 1 parameter cmd */
1391 fdctrl->data_len = 2;
1394 /* SENSE_INTERRUPT_STATUS */
1395 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1396 fdctrl->int_status);
1397 /* No parameters cmd: returns status if no interrupt */
1400 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1402 /* XXX: int_status handling is broken for read/write
1403 commands, so we do this hack. It should be suppressed
1406 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1408 fdctrl->fifo[1] = cur_drv->track;
1409 fdctrl_set_fifo(fdctrl, 2, 0);
1410 fdctrl_reset_irq(fdctrl);
1411 fdctrl->int_status = 0xC0;
1415 FLOPPY_DPRINTF("DUMPREG command\n");
1416 /* Drives position */
1417 fdctrl->fifo[0] = drv0(fdctrl)->track;
1418 fdctrl->fifo[1] = drv1(fdctrl)->track;
1419 fdctrl->fifo[2] = 0;
1420 fdctrl->fifo[3] = 0;
1422 fdctrl->fifo[4] = fdctrl->timer0;
1423 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1424 fdctrl->fifo[6] = cur_drv->last_sect;
1425 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1426 (cur_drv->perpendicular << 2);
1427 fdctrl->fifo[8] = fdctrl->config;
1428 fdctrl->fifo[9] = fdctrl->precomp_trk;
1429 fdctrl_set_fifo(fdctrl, 10, 0);
1433 FLOPPY_DPRINTF("SEEK command\n");
1434 /* 2 parameters cmd */
1435 fdctrl->data_len = 3;
1439 FLOPPY_DPRINTF("VERSION command\n");
1440 /* No parameters cmd */
1441 /* Controller's version */
1442 fdctrl->fifo[0] = fdctrl->version;
1443 fdctrl_set_fifo(fdctrl, 1, 1);
1446 /* PERPENDICULAR_MODE */
1447 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1448 /* 1 parameter cmd */
1449 fdctrl->data_len = 2;
1453 FLOPPY_DPRINTF("CONFIGURE command\n");
1454 /* 3 parameters cmd */
1455 fdctrl->data_len = 4;
1459 FLOPPY_DPRINTF("UNLOCK command\n");
1460 /* No parameters cmd */
1462 fdctrl->fifo[0] = 0;
1463 fdctrl_set_fifo(fdctrl, 1, 0);
1466 /* POWERDOWN_MODE */
1467 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1468 /* 2 parameters cmd */
1469 fdctrl->data_len = 3;
1473 FLOPPY_DPRINTF("PART_ID command\n");
1474 /* No parameters cmd */
1475 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1476 fdctrl_set_fifo(fdctrl, 1, 0);
1480 FLOPPY_DPRINTF("SAVE command\n");
1481 /* No parameters cmd */
1482 fdctrl->fifo[0] = 0;
1483 fdctrl->fifo[1] = 0;
1484 /* Drives position */
1485 fdctrl->fifo[2] = drv0(fdctrl)->track;
1486 fdctrl->fifo[3] = drv1(fdctrl)->track;
1487 fdctrl->fifo[4] = 0;
1488 fdctrl->fifo[5] = 0;
1490 fdctrl->fifo[6] = fdctrl->timer0;
1491 fdctrl->fifo[7] = fdctrl->timer1;
1492 fdctrl->fifo[8] = cur_drv->last_sect;
1493 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1494 (cur_drv->perpendicular << 2);
1495 fdctrl->fifo[10] = fdctrl->config;
1496 fdctrl->fifo[11] = fdctrl->precomp_trk;
1497 fdctrl->fifo[12] = fdctrl->pwrd;
1498 fdctrl->fifo[13] = 0;
1499 fdctrl->fifo[14] = 0;
1500 fdctrl_set_fifo(fdctrl, 15, 1);
1504 FLOPPY_DPRINTF("OPTION command\n");
1505 /* 1 parameter cmd */
1506 fdctrl->data_len = 2;
1510 FLOPPY_DPRINTF("READ_TRACK command\n");
1511 /* 8 parameters cmd */
1512 fdctrl->data_len = 9;
1516 FLOPPY_DPRINTF("READ_ID command\n");
1517 /* 1 parameter cmd */
1518 fdctrl->data_len = 2;
1522 FLOPPY_DPRINTF("RESTORE command\n");
1523 /* 17 parameters cmd */
1524 fdctrl->data_len = 18;
1528 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1529 /* 5 parameters cmd */
1530 fdctrl->data_len = 6;
1533 /* DRIVE_SPECIFICATION_COMMAND */
1534 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1535 /* 5 parameters cmd */
1536 fdctrl->data_len = 6;
1539 /* RELATIVE_SEEK_OUT */
1540 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1541 /* 2 parameters cmd */
1542 fdctrl->data_len = 3;
1546 FLOPPY_DPRINTF("LOCK command\n");
1547 /* No parameters cmd */
1549 fdctrl->fifo[0] = 0x10;
1550 fdctrl_set_fifo(fdctrl, 1, 1);
1553 /* FORMAT_AND_WRITE */
1554 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1555 /* 10 parameters cmd */
1556 fdctrl->data_len = 11;
1559 /* RELATIVE_SEEK_IN */
1560 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1561 /* 2 parameters cmd */
1562 fdctrl->data_len = 3;
1565 /* Unknown command */
1566 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1567 fdctrl_unimplemented(fdctrl);
1572 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1573 fdctrl->fifo[fdctrl->data_pos] = value;
1574 if (++fdctrl->data_pos == fdctrl->data_len) {
1575 /* We now have all parameters
1576 * and will be able to treat the command
1578 if (fdctrl->data_state & FD_STATE_FORMAT) {
1579 fdctrl_format_sector(fdctrl);
1582 switch (fdctrl->fifo[0] & 0x1F) {
1586 FLOPPY_DPRINTF("treat READ command\n");
1587 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1591 /* READ_DELETED variants */
1592 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1593 FLOPPY_ERROR("treat READ_DELETED command\n");
1594 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1597 /* VERIFY variants */
1598 // FLOPPY_DPRINTF("treat VERIFY command\n");
1599 FLOPPY_ERROR("treat VERIFY command\n");
1600 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1603 /* SCAN_EQUAL variants */
1604 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1605 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1606 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1609 /* SCAN_LOW_OR_EQUAL variants */
1610 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1611 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1612 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1615 /* SCAN_HIGH_OR_EQUAL variants */
1616 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1617 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1618 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1623 switch (fdctrl->fifo[0] & 0x3F) {
1625 /* WRITE variants */
1626 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1627 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1630 /* WRITE_DELETED variants */
1631 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1632 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1633 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1638 switch (fdctrl->fifo[0]) {
1641 FLOPPY_DPRINTF("treat SPECIFY command\n");
1642 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1643 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1644 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1645 /* No result back */
1646 fdctrl_reset_fifo(fdctrl);
1649 /* SENSE_DRIVE_STATUS */
1650 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1651 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1652 cur_drv = get_cur_drv(fdctrl);
1653 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1654 /* 1 Byte status back */
1655 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1656 (cur_drv->track == 0 ? 0x10 : 0x00) |
1657 (cur_drv->head << 2) |
1660 fdctrl_set_fifo(fdctrl, 1, 0);
1664 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1665 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1666 cur_drv = get_cur_drv(fdctrl);
1667 fd_recalibrate(cur_drv);
1668 fdctrl_reset_fifo(fdctrl);
1669 /* Raise Interrupt */
1670 fdctrl_raise_irq(fdctrl, 0x20);
1674 FLOPPY_DPRINTF("treat SEEK command\n");
1675 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1676 cur_drv = get_cur_drv(fdctrl);
1678 if (fdctrl->fifo[2] <= cur_drv->track)
1682 fdctrl_reset_fifo(fdctrl);
1683 if (fdctrl->fifo[2] > cur_drv->max_track) {
1684 fdctrl_raise_irq(fdctrl, 0x60);
1686 cur_drv->track = fdctrl->fifo[2];
1687 /* Raise Interrupt */
1688 fdctrl_raise_irq(fdctrl, 0x20);
1692 /* PERPENDICULAR_MODE */
1693 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1694 if (fdctrl->fifo[1] & 0x80)
1695 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1696 /* No result back */
1697 fdctrl_reset_fifo(fdctrl);
1701 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1702 fdctrl->config = fdctrl->fifo[2];
1703 fdctrl->precomp_trk = fdctrl->fifo[3];
1704 /* No result back */
1705 fdctrl_reset_fifo(fdctrl);
1708 /* POWERDOWN_MODE */
1709 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1710 fdctrl->pwrd = fdctrl->fifo[1];
1711 fdctrl->fifo[0] = fdctrl->fifo[1];
1712 fdctrl_set_fifo(fdctrl, 1, 1);
1716 FLOPPY_DPRINTF("treat OPTION command\n");
1717 /* No result back */
1718 fdctrl_reset_fifo(fdctrl);
1722 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1723 FLOPPY_ERROR("treat READ_TRACK command\n");
1724 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1728 FLOPPY_DPRINTF("treat READ_ID command\n");
1729 /* XXX: should set main status register to busy */
1730 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1731 qemu_mod_timer(fdctrl->result_timer,
1732 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1736 FLOPPY_DPRINTF("treat RESTORE command\n");
1737 /* Drives position */
1738 drv0(fdctrl)->track = fdctrl->fifo[3];
1739 drv1(fdctrl)->track = fdctrl->fifo[4];
1741 fdctrl->timer0 = fdctrl->fifo[7];
1742 fdctrl->timer1 = fdctrl->fifo[8];
1743 cur_drv->last_sect = fdctrl->fifo[9];
1744 fdctrl->lock = fdctrl->fifo[10] >> 7;
1745 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1746 fdctrl->config = fdctrl->fifo[11];
1747 fdctrl->precomp_trk = fdctrl->fifo[12];
1748 fdctrl->pwrd = fdctrl->fifo[13];
1749 fdctrl_reset_fifo(fdctrl);
1753 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1754 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1755 cur_drv = get_cur_drv(fdctrl);
1756 fdctrl->data_state |= FD_STATE_FORMAT;
1757 if (fdctrl->fifo[0] & 0x80)
1758 fdctrl->data_state |= FD_STATE_MULTI;
1760 fdctrl->data_state &= ~FD_STATE_MULTI;
1761 fdctrl->data_state &= ~FD_STATE_SEEK;
1763 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1765 cur_drv->last_sect =
1766 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1767 fdctrl->fifo[3] / 2;
1769 cur_drv->last_sect = fdctrl->fifo[3];
1771 /* TODO: implement format using DMA expected by the Bochs BIOS
1772 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1773 * the sector with the specified fill byte
1775 fdctrl->data_state &= ~FD_STATE_FORMAT;
1776 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1779 /* DRIVE_SPECIFICATION_COMMAND */
1780 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1781 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1782 /* Command parameters done */
1783 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1784 fdctrl->fifo[0] = fdctrl->fifo[1];
1785 fdctrl->fifo[2] = 0;
1786 fdctrl->fifo[3] = 0;
1787 fdctrl_set_fifo(fdctrl, 4, 1);
1789 fdctrl_reset_fifo(fdctrl);
1791 } else if (fdctrl->data_len > 7) {
1793 fdctrl->fifo[0] = 0x80 |
1794 (cur_drv->head << 2) | fdctrl->cur_drv;
1795 fdctrl_set_fifo(fdctrl, 1, 1);
1799 /* RELATIVE_SEEK_OUT */
1800 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1801 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1802 cur_drv = get_cur_drv(fdctrl);
1805 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1806 cur_drv->track = cur_drv->max_track - 1;
1808 cur_drv->track += fdctrl->fifo[2];
1810 fdctrl_reset_fifo(fdctrl);
1811 fdctrl_raise_irq(fdctrl, 0x20);
1814 /* FORMAT_AND_WRITE */
1815 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1816 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1817 fdctrl_unimplemented(fdctrl);
1820 /* RELATIVE_SEEK_IN */
1821 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1822 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1823 cur_drv = get_cur_drv(fdctrl);
1826 if (fdctrl->fifo[2] > cur_drv->track) {
1829 cur_drv->track -= fdctrl->fifo[2];
1831 fdctrl_reset_fifo(fdctrl);
1832 /* Raise Interrupt */
1833 fdctrl_raise_irq(fdctrl, 0x20);
1839 static void fdctrl_result_timer(void *opaque)
1841 fdctrl_t *fdctrl = opaque;
1842 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);