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 const 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)
232 const fd_format_t *parse;
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 */
373 target_phys_addr_t io_base;
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 */
404 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
406 fdctrl_t *fdctrl = opaque;
409 switch (reg & 0x07) {
412 // Identify to Linux as S82078B
413 retval = fdctrl_read_statusB(fdctrl);
415 retval = (uint32_t)(-1);
419 retval = fdctrl_read_statusB(fdctrl);
422 retval = fdctrl_read_dor(fdctrl);
425 retval = fdctrl_read_tape(fdctrl);
428 retval = fdctrl_read_main_status(fdctrl);
431 retval = fdctrl_read_data(fdctrl);
434 retval = fdctrl_read_dir(fdctrl);
437 retval = (uint32_t)(-1);
440 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
445 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
447 fdctrl_t *fdctrl = opaque;
449 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
451 switch (reg & 0x07) {
453 fdctrl_write_dor(fdctrl, value);
456 fdctrl_write_tape(fdctrl, value);
459 fdctrl_write_rate(fdctrl, value);
462 fdctrl_write_data(fdctrl, value);
469 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
471 return fdctrl_read(opaque, (uint32_t)reg);
474 static void fdctrl_write_mem (void *opaque,
475 target_phys_addr_t reg, uint32_t value)
477 fdctrl_write(opaque, (uint32_t)reg, value);
480 static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
486 static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
492 static void fd_save (QEMUFile *f, fdrive_t *fd)
497 qemu_put_8s(f, &tmp);
498 qemu_put_8s(f, &fd->head);
499 qemu_put_8s(f, &fd->track);
500 qemu_put_8s(f, &fd->sect);
501 qemu_put_8s(f, &fd->dir);
502 qemu_put_8s(f, &fd->rw);
505 static void fdc_save (QEMUFile *f, void *opaque)
507 fdctrl_t *s = opaque;
509 qemu_put_8s(f, &s->state);
510 qemu_put_8s(f, &s->dma_en);
511 qemu_put_8s(f, &s->cur_drv);
512 qemu_put_8s(f, &s->bootsel);
513 qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN);
514 qemu_put_be32s(f, &s->data_pos);
515 qemu_put_be32s(f, &s->data_len);
516 qemu_put_8s(f, &s->data_state);
517 qemu_put_8s(f, &s->data_dir);
518 qemu_put_8s(f, &s->int_status);
519 qemu_put_8s(f, &s->eot);
520 qemu_put_8s(f, &s->timer0);
521 qemu_put_8s(f, &s->timer1);
522 qemu_put_8s(f, &s->precomp_trk);
523 qemu_put_8s(f, &s->config);
524 qemu_put_8s(f, &s->lock);
525 qemu_put_8s(f, &s->pwrd);
526 fd_save(f, &s->drives[0]);
527 fd_save(f, &s->drives[1]);
530 static int fd_load (QEMUFile *f, fdrive_t *fd)
534 qemu_get_8s(f, &tmp);
536 qemu_get_8s(f, &fd->head);
537 qemu_get_8s(f, &fd->track);
538 qemu_get_8s(f, &fd->sect);
539 qemu_get_8s(f, &fd->dir);
540 qemu_get_8s(f, &fd->rw);
545 static int fdc_load (QEMUFile *f, void *opaque, int version_id)
547 fdctrl_t *s = opaque;
553 qemu_get_8s(f, &s->state);
554 qemu_get_8s(f, &s->dma_en);
555 qemu_get_8s(f, &s->cur_drv);
556 qemu_get_8s(f, &s->bootsel);
557 qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN);
558 qemu_get_be32s(f, &s->data_pos);
559 qemu_get_be32s(f, &s->data_len);
560 qemu_get_8s(f, &s->data_state);
561 qemu_get_8s(f, &s->data_dir);
562 qemu_get_8s(f, &s->int_status);
563 qemu_get_8s(f, &s->eot);
564 qemu_get_8s(f, &s->timer0);
565 qemu_get_8s(f, &s->timer1);
566 qemu_get_8s(f, &s->precomp_trk);
567 qemu_get_8s(f, &s->config);
568 qemu_get_8s(f, &s->lock);
569 qemu_get_8s(f, &s->pwrd);
571 ret = fd_load(f, &s->drives[0]);
573 ret = fd_load(f, &s->drives[1]);
578 static void fdctrl_external_reset(void *opaque)
580 fdctrl_t *s = opaque;
585 fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
586 target_phys_addr_t io_base,
587 BlockDriverState **fds)
593 FLOPPY_DPRINTF("init controller\n");
594 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
597 fdctrl->result_timer = qemu_new_timer(vm_clock,
598 fdctrl_result_timer, fdctrl);
600 fdctrl->version = 0x90; /* Intel 82078 controller */
602 fdctrl->dma_chann = dma_chann;
603 fdctrl->io_base = io_base;
604 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
606 if (fdctrl->dma_chann != -1) {
608 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
612 for (i = 0; i < 2; i++) {
613 fd_init(&fdctrl->drives[i], fds[i]);
615 fdctrl_reset(fdctrl, 0);
616 fdctrl->state = FD_CTRL_ACTIVE;
618 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
620 cpu_register_physical_memory(io_base, 0x08, io_mem);
622 register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read,
624 register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read,
626 register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write,
628 register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write,
631 register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl);
632 qemu_register_reset(fdctrl_external_reset, fdctrl);
633 for (i = 0; i < 2; i++) {
634 fd_revalidate(&fdctrl->drives[i]);
640 fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base,
641 BlockDriverState **fds)
645 fdctrl = fdctrl_init(irq, 0, 1, io_base, fds);
651 /* XXX: may change if moved to bdrv */
652 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
654 return fdctrl->drives[drive_num].drive;
657 /* Change IRQ state */
658 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
660 FLOPPY_DPRINTF("Reset interrupt\n");
661 qemu_set_irq(fdctrl->irq, 0);
662 fdctrl->state &= ~FD_CTRL_INTR;
665 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
668 if (fdctrl->sun4m && !fdctrl->dma_en) {
669 fdctrl->state &= ~FD_CTRL_BUSY;
670 fdctrl->int_status = status;
673 if (~(fdctrl->state & FD_CTRL_INTR)) {
674 qemu_set_irq(fdctrl->irq, 1);
675 fdctrl->state |= FD_CTRL_INTR;
677 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
678 fdctrl->int_status = status;
681 /* Reset controller */
682 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
686 FLOPPY_DPRINTF("reset controller\n");
687 fdctrl_reset_irq(fdctrl);
688 /* Initialise controller */
691 fdctrl->data_pos = 0;
692 fdctrl->data_len = 0;
693 fdctrl->data_state = FD_STATE_CMD;
694 fdctrl->data_dir = FD_DIR_WRITE;
695 for (i = 0; i < MAX_FD; i++)
696 fd_reset(&fdctrl->drives[i]);
697 fdctrl_reset_fifo(fdctrl);
699 fdctrl_raise_irq(fdctrl, 0xc0);
702 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
704 return &fdctrl->drives[fdctrl->bootsel];
707 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
709 return &fdctrl->drives[1 - fdctrl->bootsel];
712 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
714 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
717 /* Status B register : 0x01 (read-only) */
718 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
720 FLOPPY_DPRINTF("status register: 0x00\n");
724 /* Digital output register : 0x02 */
725 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
729 /* Drive motors state indicators */
730 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
732 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
735 retval |= fdctrl->dma_en << 3;
736 /* Reset indicator */
737 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
739 retval |= fdctrl->cur_drv;
740 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
745 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
748 if (fdctrl->state & FD_CTRL_RESET) {
749 if (!(value & 0x04)) {
750 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
754 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
755 /* Drive motors state indicators */
757 fd_start(drv1(fdctrl));
759 fd_stop(drv1(fdctrl));
761 fd_start(drv0(fdctrl));
763 fd_stop(drv0(fdctrl));
766 if (fdctrl->dma_chann != -1)
767 fdctrl->dma_en = 1 - ((value >> 3) & 1);
770 if (!(value & 0x04)) {
771 if (!(fdctrl->state & FD_CTRL_RESET)) {
772 FLOPPY_DPRINTF("controller enter RESET state\n");
773 fdctrl->state |= FD_CTRL_RESET;
776 if (fdctrl->state & FD_CTRL_RESET) {
777 FLOPPY_DPRINTF("controller out of RESET state\n");
778 fdctrl_reset(fdctrl, 1);
779 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
783 fdctrl->cur_drv = value & 1;
786 /* Tape drive register : 0x03 */
787 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
791 /* Disk boot selection indicator */
792 retval |= fdctrl->bootsel << 2;
793 /* Tape indicators: never allowed */
794 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
799 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
802 if (fdctrl->state & FD_CTRL_RESET) {
803 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
806 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
807 /* Disk boot selection indicator */
808 fdctrl->bootsel = (value >> 2) & 1;
809 /* Tape indicators: never allow */
812 /* Main status register : 0x04 (read) */
813 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
817 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
818 if (!(fdctrl->state & FD_CTRL_BUSY)) {
819 /* Data transfer allowed */
821 /* Data transfer direction indicator */
822 if (fdctrl->data_dir == FD_DIR_READ)
825 /* Should handle 0x20 for SPECIFY command */
826 /* Command busy indicator */
827 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
828 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
830 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
835 /* Data select rate register : 0x04 (write) */
836 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
839 if (fdctrl->state & FD_CTRL_RESET) {
840 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
843 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
844 /* Reset: autoclear */
846 fdctrl->state |= FD_CTRL_RESET;
847 fdctrl_reset(fdctrl, 1);
848 fdctrl->state &= ~FD_CTRL_RESET;
851 fdctrl->state |= FD_CTRL_SLEEP;
852 fdctrl_reset(fdctrl, 1);
854 // fdctrl.precomp = (value >> 2) & 0x07;
857 static int fdctrl_media_changed(fdrive_t *drv)
863 ret = bdrv_media_changed(drv->bs);
870 /* Digital input register : 0x07 (read-only) */
871 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
875 if (fdctrl_media_changed(drv0(fdctrl)) ||
876 fdctrl_media_changed(drv1(fdctrl)))
879 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
884 /* FIFO state control */
885 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
887 fdctrl->data_dir = FD_DIR_WRITE;
888 fdctrl->data_pos = 0;
889 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
892 /* Set FIFO status for the host to read */
893 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
895 fdctrl->data_dir = FD_DIR_READ;
896 fdctrl->data_len = fifo_len;
897 fdctrl->data_pos = 0;
898 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
900 fdctrl_raise_irq(fdctrl, 0x00);
903 /* Set an error: unimplemented/unknown command */
904 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
909 cur_drv = get_cur_drv(fdctrl);
910 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
911 fdctrl->fifo[1] = 0x00;
912 fdctrl->fifo[2] = 0x00;
913 fdctrl_set_fifo(fdctrl, 3, 1);
915 // fdctrl_reset_fifo(fdctrl);
916 fdctrl->fifo[0] = 0x80;
917 fdctrl_set_fifo(fdctrl, 1, 0);
921 /* Callback for transfer end (stop or abort) */
922 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
923 uint8_t status1, uint8_t status2)
927 cur_drv = get_cur_drv(fdctrl);
928 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
929 status0, status1, status2,
930 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
931 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
932 fdctrl->fifo[1] = status1;
933 fdctrl->fifo[2] = status2;
934 fdctrl->fifo[3] = cur_drv->track;
935 fdctrl->fifo[4] = cur_drv->head;
936 fdctrl->fifo[5] = cur_drv->sect;
937 fdctrl->fifo[6] = FD_SECTOR_SC;
938 fdctrl->data_dir = FD_DIR_READ;
939 if (fdctrl->state & FD_CTRL_BUSY) {
940 DMA_release_DREQ(fdctrl->dma_chann);
941 fdctrl->state &= ~FD_CTRL_BUSY;
943 fdctrl_set_fifo(fdctrl, 7, 1);
946 /* Prepare a data transfer (either DMA or FIFO) */
947 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
953 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
954 cur_drv = get_cur_drv(fdctrl);
955 kt = fdctrl->fifo[2];
956 kh = fdctrl->fifo[3];
957 ks = fdctrl->fifo[4];
958 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
959 fdctrl->cur_drv, kh, kt, ks,
960 _fd_sector(kh, kt, ks, cur_drv->last_sect));
962 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
965 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
966 fdctrl->fifo[3] = kt;
967 fdctrl->fifo[4] = kh;
968 fdctrl->fifo[5] = ks;
972 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
973 fdctrl->fifo[3] = kt;
974 fdctrl->fifo[4] = kh;
975 fdctrl->fifo[5] = ks;
978 /* No seek enabled */
979 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
980 fdctrl->fifo[3] = kt;
981 fdctrl->fifo[4] = kh;
982 fdctrl->fifo[5] = ks;
990 /* Set the FIFO state */
991 fdctrl->data_dir = direction;
992 fdctrl->data_pos = 0;
993 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
994 if (fdctrl->fifo[0] & 0x80)
995 fdctrl->data_state |= FD_STATE_MULTI;
997 fdctrl->data_state &= ~FD_STATE_MULTI;
999 fdctrl->data_state |= FD_STATE_SEEK;
1001 fdctrl->data_state &= ~FD_STATE_SEEK;
1002 if (fdctrl->fifo[5] == 00) {
1003 fdctrl->data_len = fdctrl->fifo[8];
1006 fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1007 tmp = (cur_drv->last_sect - ks + 1);
1008 if (fdctrl->fifo[0] & 0x80)
1009 tmp += cur_drv->last_sect;
1010 fdctrl->data_len *= tmp;
1012 fdctrl->eot = fdctrl->fifo[6];
1013 if (fdctrl->dma_en) {
1015 /* DMA transfer are enabled. Check if DMA channel is well programmed */
1016 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1017 dma_mode = (dma_mode >> 2) & 3;
1018 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1019 dma_mode, direction,
1020 (128 << fdctrl->fifo[5]) *
1021 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1022 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1023 direction == FD_DIR_SCANH) && dma_mode == 0) ||
1024 (direction == FD_DIR_WRITE && dma_mode == 2) ||
1025 (direction == FD_DIR_READ && dma_mode == 1)) {
1026 /* No access is allowed until DMA transfer has completed */
1027 fdctrl->state |= FD_CTRL_BUSY;
1028 /* Now, we just have to wait for the DMA controller to
1031 DMA_hold_DREQ(fdctrl->dma_chann);
1032 DMA_schedule(fdctrl->dma_chann);
1035 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1038 FLOPPY_DPRINTF("start non-DMA transfer\n");
1039 /* IO based transfer: calculate len */
1040 fdctrl_raise_irq(fdctrl, 0x00);
1045 /* Prepare a transfer of deleted data */
1046 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1048 /* We don't handle deleted data,
1049 * so we don't return *ANYTHING*
1051 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1054 /* handlers for DMA transfers */
1055 static int fdctrl_transfer_handler (void *opaque, int nchan,
1056 int dma_pos, int dma_len)
1060 int len, start_pos, rel_pos;
1061 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1064 if (!(fdctrl->state & FD_CTRL_BUSY)) {
1065 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1068 cur_drv = get_cur_drv(fdctrl);
1069 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1070 fdctrl->data_dir == FD_DIR_SCANH)
1072 if (dma_len > fdctrl->data_len)
1073 dma_len = fdctrl->data_len;
1074 if (cur_drv->bs == NULL) {
1075 if (fdctrl->data_dir == FD_DIR_WRITE)
1076 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1078 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1080 goto transfer_error;
1082 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1083 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1084 len = dma_len - fdctrl->data_pos;
1085 if (len + rel_pos > FD_SECTOR_LEN)
1086 len = FD_SECTOR_LEN - rel_pos;
1087 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1088 "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1089 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1090 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1091 fd_sector(cur_drv) * 512);
1092 if (fdctrl->data_dir != FD_DIR_WRITE ||
1093 len < FD_SECTOR_LEN || rel_pos != 0) {
1094 /* READ & SCAN commands and realign to a sector for WRITE */
1095 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1096 fdctrl->fifo, 1) < 0) {
1097 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1098 fd_sector(cur_drv));
1099 /* Sure, image size is too small... */
1100 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1103 switch (fdctrl->data_dir) {
1106 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1107 fdctrl->data_pos, len);
1110 /* WRITE commands */
1111 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1112 fdctrl->data_pos, len);
1113 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1114 fdctrl->fifo, 1) < 0) {
1115 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1116 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1117 goto transfer_error;
1123 uint8_t tmpbuf[FD_SECTOR_LEN];
1125 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1126 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1131 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1132 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1139 fdctrl->data_pos += len;
1140 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1142 /* Seek to next sector */
1143 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1144 cur_drv->head, cur_drv->track, cur_drv->sect,
1146 fdctrl->data_pos - len);
1147 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1149 if (cur_drv->sect >= cur_drv->last_sect ||
1150 cur_drv->sect == fdctrl->eot) {
1152 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1153 if (cur_drv->head == 0 &&
1154 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1159 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1166 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1167 cur_drv->head, cur_drv->track,
1168 cur_drv->sect, fd_sector(cur_drv));
1175 len = fdctrl->data_pos - start_pos;
1176 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1177 fdctrl->data_pos, len, fdctrl->data_len);
1178 if (fdctrl->data_dir == FD_DIR_SCANE ||
1179 fdctrl->data_dir == FD_DIR_SCANL ||
1180 fdctrl->data_dir == FD_DIR_SCANH)
1182 if (FD_DID_SEEK(fdctrl->data_state))
1184 fdctrl->data_len -= len;
1185 // if (fdctrl->data_len == 0)
1186 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1192 /* Data register : 0x05 */
1193 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1196 uint32_t retval = 0;
1199 cur_drv = get_cur_drv(fdctrl);
1200 fdctrl->state &= ~FD_CTRL_SLEEP;
1201 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1202 FLOPPY_ERROR("can't read data in CMD state\n");
1205 pos = fdctrl->data_pos;
1206 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1207 pos %= FD_SECTOR_LEN;
1209 len = fdctrl->data_len - fdctrl->data_pos;
1210 if (len > FD_SECTOR_LEN)
1211 len = FD_SECTOR_LEN;
1212 bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1215 retval = fdctrl->fifo[pos];
1216 if (++fdctrl->data_pos == fdctrl->data_len) {
1217 fdctrl->data_pos = 0;
1218 /* Switch from transfer mode to status mode
1219 * then from status mode to command mode
1221 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1222 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1224 fdctrl_reset_fifo(fdctrl);
1225 fdctrl_reset_irq(fdctrl);
1228 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1233 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1239 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1240 cur_drv = get_cur_drv(fdctrl);
1241 kt = fdctrl->fifo[6];
1242 kh = fdctrl->fifo[7];
1243 ks = fdctrl->fifo[8];
1244 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1245 fdctrl->cur_drv, kh, kt, ks,
1246 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1248 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1251 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1252 fdctrl->fifo[3] = kt;
1253 fdctrl->fifo[4] = kh;
1254 fdctrl->fifo[5] = ks;
1258 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1259 fdctrl->fifo[3] = kt;
1260 fdctrl->fifo[4] = kh;
1261 fdctrl->fifo[5] = ks;
1264 /* No seek enabled */
1265 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1266 fdctrl->fifo[3] = kt;
1267 fdctrl->fifo[4] = kh;
1268 fdctrl->fifo[5] = ks;
1272 fdctrl->data_state |= FD_STATE_SEEK;
1277 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1278 if (cur_drv->bs == NULL ||
1279 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1280 FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1281 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1283 if (cur_drv->sect == cur_drv->last_sect) {
1284 fdctrl->data_state &= ~FD_STATE_FORMAT;
1285 /* Last sector done */
1286 if (FD_DID_SEEK(fdctrl->data_state))
1287 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1289 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1292 fdctrl->data_pos = 0;
1293 fdctrl->data_len = 4;
1298 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1302 cur_drv = get_cur_drv(fdctrl);
1304 if (fdctrl->state & FD_CTRL_RESET) {
1305 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1308 fdctrl->state &= ~FD_CTRL_SLEEP;
1309 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1310 FLOPPY_ERROR("can't write data in status mode\n");
1313 /* Is it write command time ? */
1314 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1315 /* FIFO data write */
1316 fdctrl->fifo[fdctrl->data_pos++] = value;
1317 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1318 fdctrl->data_pos == fdctrl->data_len) {
1319 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1321 /* Switch from transfer mode to status mode
1322 * then from status mode to command mode
1324 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1325 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1328 if (fdctrl->data_pos == 0) {
1330 switch (value & 0x5F) {
1333 FLOPPY_DPRINTF("READ command\n");
1334 /* 8 parameters cmd */
1335 fdctrl->data_len = 9;
1338 /* READ_DELETED variants */
1339 FLOPPY_DPRINTF("READ_DELETED command\n");
1340 /* 8 parameters cmd */
1341 fdctrl->data_len = 9;
1344 /* SCAN_EQUAL variants */
1345 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1346 /* 8 parameters cmd */
1347 fdctrl->data_len = 9;
1350 /* VERIFY variants */
1351 FLOPPY_DPRINTF("VERIFY command\n");
1352 /* 8 parameters cmd */
1353 fdctrl->data_len = 9;
1356 /* SCAN_LOW_OR_EQUAL variants */
1357 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1358 /* 8 parameters cmd */
1359 fdctrl->data_len = 9;
1362 /* SCAN_HIGH_OR_EQUAL variants */
1363 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1364 /* 8 parameters cmd */
1365 fdctrl->data_len = 9;
1370 switch (value & 0x7F) {
1372 /* WRITE variants */
1373 FLOPPY_DPRINTF("WRITE command\n");
1374 /* 8 parameters cmd */
1375 fdctrl->data_len = 9;
1378 /* WRITE_DELETED variants */
1379 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1380 /* 8 parameters cmd */
1381 fdctrl->data_len = 9;
1389 FLOPPY_DPRINTF("SPECIFY command\n");
1390 /* 1 parameter cmd */
1391 fdctrl->data_len = 3;
1394 /* SENSE_DRIVE_STATUS */
1395 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1396 /* 1 parameter cmd */
1397 fdctrl->data_len = 2;
1401 FLOPPY_DPRINTF("RECALIBRATE command\n");
1402 /* 1 parameter cmd */
1403 fdctrl->data_len = 2;
1406 /* SENSE_INTERRUPT_STATUS */
1407 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1408 fdctrl->int_status);
1409 /* No parameters cmd: returns status if no interrupt */
1412 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1414 /* XXX: int_status handling is broken for read/write
1415 commands, so we do this hack. It should be suppressed
1418 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1420 fdctrl->fifo[1] = cur_drv->track;
1421 fdctrl_set_fifo(fdctrl, 2, 0);
1422 fdctrl_reset_irq(fdctrl);
1423 fdctrl->int_status = 0xC0;
1427 FLOPPY_DPRINTF("DUMPREG command\n");
1428 /* Drives position */
1429 fdctrl->fifo[0] = drv0(fdctrl)->track;
1430 fdctrl->fifo[1] = drv1(fdctrl)->track;
1431 fdctrl->fifo[2] = 0;
1432 fdctrl->fifo[3] = 0;
1434 fdctrl->fifo[4] = fdctrl->timer0;
1435 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1436 fdctrl->fifo[6] = cur_drv->last_sect;
1437 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1438 (cur_drv->perpendicular << 2);
1439 fdctrl->fifo[8] = fdctrl->config;
1440 fdctrl->fifo[9] = fdctrl->precomp_trk;
1441 fdctrl_set_fifo(fdctrl, 10, 0);
1445 FLOPPY_DPRINTF("SEEK command\n");
1446 /* 2 parameters cmd */
1447 fdctrl->data_len = 3;
1451 FLOPPY_DPRINTF("VERSION command\n");
1452 /* No parameters cmd */
1453 /* Controller's version */
1454 fdctrl->fifo[0] = fdctrl->version;
1455 fdctrl_set_fifo(fdctrl, 1, 1);
1458 /* PERPENDICULAR_MODE */
1459 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1460 /* 1 parameter cmd */
1461 fdctrl->data_len = 2;
1465 FLOPPY_DPRINTF("CONFIGURE command\n");
1466 /* 3 parameters cmd */
1467 fdctrl->data_len = 4;
1471 FLOPPY_DPRINTF("UNLOCK command\n");
1472 /* No parameters cmd */
1474 fdctrl->fifo[0] = 0;
1475 fdctrl_set_fifo(fdctrl, 1, 0);
1478 /* POWERDOWN_MODE */
1479 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1480 /* 2 parameters cmd */
1481 fdctrl->data_len = 3;
1485 FLOPPY_DPRINTF("PART_ID command\n");
1486 /* No parameters cmd */
1487 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1488 fdctrl_set_fifo(fdctrl, 1, 0);
1492 FLOPPY_DPRINTF("SAVE command\n");
1493 /* No parameters cmd */
1494 fdctrl->fifo[0] = 0;
1495 fdctrl->fifo[1] = 0;
1496 /* Drives position */
1497 fdctrl->fifo[2] = drv0(fdctrl)->track;
1498 fdctrl->fifo[3] = drv1(fdctrl)->track;
1499 fdctrl->fifo[4] = 0;
1500 fdctrl->fifo[5] = 0;
1502 fdctrl->fifo[6] = fdctrl->timer0;
1503 fdctrl->fifo[7] = fdctrl->timer1;
1504 fdctrl->fifo[8] = cur_drv->last_sect;
1505 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1506 (cur_drv->perpendicular << 2);
1507 fdctrl->fifo[10] = fdctrl->config;
1508 fdctrl->fifo[11] = fdctrl->precomp_trk;
1509 fdctrl->fifo[12] = fdctrl->pwrd;
1510 fdctrl->fifo[13] = 0;
1511 fdctrl->fifo[14] = 0;
1512 fdctrl_set_fifo(fdctrl, 15, 1);
1516 FLOPPY_DPRINTF("OPTION command\n");
1517 /* 1 parameter cmd */
1518 fdctrl->data_len = 2;
1522 FLOPPY_DPRINTF("READ_TRACK command\n");
1523 /* 8 parameters cmd */
1524 fdctrl->data_len = 9;
1528 FLOPPY_DPRINTF("READ_ID command\n");
1529 /* 1 parameter cmd */
1530 fdctrl->data_len = 2;
1534 FLOPPY_DPRINTF("RESTORE command\n");
1535 /* 17 parameters cmd */
1536 fdctrl->data_len = 18;
1540 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1541 /* 5 parameters cmd */
1542 fdctrl->data_len = 6;
1545 /* DRIVE_SPECIFICATION_COMMAND */
1546 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1547 /* 5 parameters cmd */
1548 fdctrl->data_len = 6;
1551 /* RELATIVE_SEEK_OUT */
1552 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1553 /* 2 parameters cmd */
1554 fdctrl->data_len = 3;
1558 FLOPPY_DPRINTF("LOCK command\n");
1559 /* No parameters cmd */
1561 fdctrl->fifo[0] = 0x10;
1562 fdctrl_set_fifo(fdctrl, 1, 1);
1565 /* FORMAT_AND_WRITE */
1566 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1567 /* 10 parameters cmd */
1568 fdctrl->data_len = 11;
1571 /* RELATIVE_SEEK_IN */
1572 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1573 /* 2 parameters cmd */
1574 fdctrl->data_len = 3;
1577 /* Unknown command */
1578 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1579 fdctrl_unimplemented(fdctrl);
1584 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1585 fdctrl->fifo[fdctrl->data_pos] = value;
1586 if (++fdctrl->data_pos == fdctrl->data_len) {
1587 /* We now have all parameters
1588 * and will be able to treat the command
1590 if (fdctrl->data_state & FD_STATE_FORMAT) {
1591 fdctrl_format_sector(fdctrl);
1594 switch (fdctrl->fifo[0] & 0x1F) {
1598 FLOPPY_DPRINTF("treat READ command\n");
1599 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1603 /* READ_DELETED variants */
1604 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1605 FLOPPY_ERROR("treat READ_DELETED command\n");
1606 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1609 /* VERIFY variants */
1610 // FLOPPY_DPRINTF("treat VERIFY command\n");
1611 FLOPPY_ERROR("treat VERIFY command\n");
1612 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1615 /* SCAN_EQUAL variants */
1616 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1617 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1618 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1621 /* SCAN_LOW_OR_EQUAL variants */
1622 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1623 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1624 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1627 /* SCAN_HIGH_OR_EQUAL variants */
1628 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1629 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1630 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1635 switch (fdctrl->fifo[0] & 0x3F) {
1637 /* WRITE variants */
1638 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1639 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1642 /* WRITE_DELETED variants */
1643 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1644 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1645 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1650 switch (fdctrl->fifo[0]) {
1653 FLOPPY_DPRINTF("treat SPECIFY command\n");
1654 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1655 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1656 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1657 /* No result back */
1658 fdctrl_reset_fifo(fdctrl);
1661 /* SENSE_DRIVE_STATUS */
1662 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1663 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1664 cur_drv = get_cur_drv(fdctrl);
1665 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1666 /* 1 Byte status back */
1667 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1668 (cur_drv->track == 0 ? 0x10 : 0x00) |
1669 (cur_drv->head << 2) |
1672 fdctrl_set_fifo(fdctrl, 1, 0);
1676 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1677 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1678 cur_drv = get_cur_drv(fdctrl);
1679 fd_recalibrate(cur_drv);
1680 fdctrl_reset_fifo(fdctrl);
1681 /* Raise Interrupt */
1682 fdctrl_raise_irq(fdctrl, 0x20);
1686 FLOPPY_DPRINTF("treat SEEK command\n");
1687 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1688 cur_drv = get_cur_drv(fdctrl);
1690 if (fdctrl->fifo[2] <= cur_drv->track)
1694 fdctrl_reset_fifo(fdctrl);
1695 if (fdctrl->fifo[2] > cur_drv->max_track) {
1696 fdctrl_raise_irq(fdctrl, 0x60);
1698 cur_drv->track = fdctrl->fifo[2];
1699 /* Raise Interrupt */
1700 fdctrl_raise_irq(fdctrl, 0x20);
1704 /* PERPENDICULAR_MODE */
1705 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1706 if (fdctrl->fifo[1] & 0x80)
1707 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1708 /* No result back */
1709 fdctrl_reset_fifo(fdctrl);
1713 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1714 fdctrl->config = fdctrl->fifo[2];
1715 fdctrl->precomp_trk = fdctrl->fifo[3];
1716 /* No result back */
1717 fdctrl_reset_fifo(fdctrl);
1720 /* POWERDOWN_MODE */
1721 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1722 fdctrl->pwrd = fdctrl->fifo[1];
1723 fdctrl->fifo[0] = fdctrl->fifo[1];
1724 fdctrl_set_fifo(fdctrl, 1, 1);
1728 FLOPPY_DPRINTF("treat OPTION command\n");
1729 /* No result back */
1730 fdctrl_reset_fifo(fdctrl);
1734 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1735 FLOPPY_ERROR("treat READ_TRACK command\n");
1736 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1740 FLOPPY_DPRINTF("treat READ_ID command\n");
1741 /* XXX: should set main status register to busy */
1742 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1743 qemu_mod_timer(fdctrl->result_timer,
1744 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1748 FLOPPY_DPRINTF("treat RESTORE command\n");
1749 /* Drives position */
1750 drv0(fdctrl)->track = fdctrl->fifo[3];
1751 drv1(fdctrl)->track = fdctrl->fifo[4];
1753 fdctrl->timer0 = fdctrl->fifo[7];
1754 fdctrl->timer1 = fdctrl->fifo[8];
1755 cur_drv->last_sect = fdctrl->fifo[9];
1756 fdctrl->lock = fdctrl->fifo[10] >> 7;
1757 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1758 fdctrl->config = fdctrl->fifo[11];
1759 fdctrl->precomp_trk = fdctrl->fifo[12];
1760 fdctrl->pwrd = fdctrl->fifo[13];
1761 fdctrl_reset_fifo(fdctrl);
1765 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1766 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1767 cur_drv = get_cur_drv(fdctrl);
1768 fdctrl->data_state |= FD_STATE_FORMAT;
1769 if (fdctrl->fifo[0] & 0x80)
1770 fdctrl->data_state |= FD_STATE_MULTI;
1772 fdctrl->data_state &= ~FD_STATE_MULTI;
1773 fdctrl->data_state &= ~FD_STATE_SEEK;
1775 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1777 cur_drv->last_sect =
1778 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1779 fdctrl->fifo[3] / 2;
1781 cur_drv->last_sect = fdctrl->fifo[3];
1783 /* TODO: implement format using DMA expected by the Bochs BIOS
1784 * and Linux fdformat (read 3 bytes per sector via DMA and fill
1785 * the sector with the specified fill byte
1787 fdctrl->data_state &= ~FD_STATE_FORMAT;
1788 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1791 /* DRIVE_SPECIFICATION_COMMAND */
1792 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1793 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1794 /* Command parameters done */
1795 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1796 fdctrl->fifo[0] = fdctrl->fifo[1];
1797 fdctrl->fifo[2] = 0;
1798 fdctrl->fifo[3] = 0;
1799 fdctrl_set_fifo(fdctrl, 4, 1);
1801 fdctrl_reset_fifo(fdctrl);
1803 } else if (fdctrl->data_len > 7) {
1805 fdctrl->fifo[0] = 0x80 |
1806 (cur_drv->head << 2) | fdctrl->cur_drv;
1807 fdctrl_set_fifo(fdctrl, 1, 1);
1811 /* RELATIVE_SEEK_OUT */
1812 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1813 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1814 cur_drv = get_cur_drv(fdctrl);
1817 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1818 cur_drv->track = cur_drv->max_track - 1;
1820 cur_drv->track += fdctrl->fifo[2];
1822 fdctrl_reset_fifo(fdctrl);
1823 fdctrl_raise_irq(fdctrl, 0x20);
1826 /* FORMAT_AND_WRITE */
1827 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1828 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1829 fdctrl_unimplemented(fdctrl);
1832 /* RELATIVE_SEEK_IN */
1833 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1834 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1835 cur_drv = get_cur_drv(fdctrl);
1838 if (fdctrl->fifo[2] > cur_drv->track) {
1841 cur_drv->track -= fdctrl->fifo[2];
1843 fdctrl_reset_fifo(fdctrl);
1844 /* Raise Interrupt */
1845 fdctrl_raise_irq(fdctrl, 0x20);
1851 static void fdctrl_result_timer(void *opaque)
1853 fdctrl_t *fdctrl = opaque;
1854 fdrive_t *cur_drv = get_cur_drv(fdctrl);
1856 /* Pretend we are spinning.
1857 * This is needed for Coherent, which uses READ ID to check for
1858 * sector interleaving.
1860 if (cur_drv->last_sect != 0) {
1861 cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
1863 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);