2 * QEMU Floppy disk emulator
4 * Copyright (c) 2003 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
31 /********************************************************/
32 /* debug Floppy devices */
33 //#define DEBUG_FLOPPY
36 #define FLOPPY_DPRINTF(fmt, args...) \
37 do { printf("FLOPPY: " fmt , ##args); } while (0)
39 #define FLOPPY_DPRINTF(fmt, args...)
42 #define FLOPPY_ERROR(fmt, args...) \
43 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
45 /********************************************************/
46 /* Floppy drive emulation */
48 /* Will always be a fixed parameter for us */
49 #define FD_SECTOR_LEN 512
50 #define FD_SECTOR_SC 2 /* Sector size code */
52 /* Floppy disk drive emulation */
53 typedef enum fdisk_type_t {
54 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
55 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
56 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
57 FDRIVE_DISK_NONE = 0x04, /* 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 struct fdrive_t {
71 uint8_t motor; /* on/off */
72 uint8_t perpendicular; /* 2.88 MB access mode */
73 uint8_t rv; /* Revalidated */
78 /* Last operation status */
79 uint8_t dir; /* Direction */
80 uint8_t rw; /* Read/write */
82 fdisk_type_t disk; /* Disk type */
83 uint8_t last_sect; /* Nb sector per track */
84 uint8_t max_track; /* Nb of tracks */
85 uint8_t ro; /* Is read-only */
88 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
93 drv->drive = FDRIVE_DRV_144;
95 drv->drive = FDRIVE_DRV_NONE;
97 drv->perpendicular = 0;
100 drv->disk = FDRIVE_DISK_NONE;
105 static int _fd_sector (uint8_t head, uint8_t track,
106 uint8_t sect, uint8_t last_sect)
108 return (((track * 2) + head) * last_sect) + sect - 1;
111 /* Returns current position, in sectors, for given drive */
112 static int fd_sector (fdrive_t *drv)
114 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
117 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
122 if (track > drv->max_track) {
123 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
124 head, track, sect, 1, drv->max_track, drv->last_sect);
127 if (sect > drv->last_sect) {
128 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
129 head, track, sect, 1, drv->max_track, drv->last_sect);
132 sector = _fd_sector(head, track, sect, drv->last_sect);
133 if (sector != fd_sector(drv)) {
136 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
137 head, track, sect, 1, drv->max_track, drv->last_sect);
150 /* Set drive back to track 0 */
151 static void fd_recalibrate (fdrive_t *drv)
153 FLOPPY_DPRINTF("recalibrate\n");
161 /* Revalidate a disk drive after a disk change */
162 static void fd_revalidate (fdrive_t *drv)
166 FLOPPY_DPRINTF("revalidate\n");
168 /* if no drive present, cannot do more */
172 if (bdrv_is_inserted(drv->bs)) {
173 bdrv_get_geometry(drv->bs, &nb_sectors);
175 if (nb_sectors > 2880)
178 /* Pretend we have a 2.88 MB disk */
179 drv->disk = FDRIVE_DISK_288;
183 } else if (nb_sectors > 1440) {
184 /* Pretend we have a 1.44 MB disk */
185 drv->disk = FDRIVE_DISK_144;
189 /* Pretend we have a 720 kB disk */
190 drv->disk = FDRIVE_DISK_720;
195 drv->ro = bdrv_is_read_only(drv->bs);
197 drv->disk = FDRIVE_DISK_NONE;
198 drv->last_sect = 1; /* Avoid eventual divide by 0 bugs */
204 static void fd_change_cb (void *opaque)
206 fdrive_t *drv = opaque;
211 static void fd_start (fdrive_t *drv)
216 static void fd_stop (fdrive_t *drv)
221 /* Re-initialise a drives (motor off, repositioned) */
222 static void fd_reset (fdrive_t *drv)
228 /********************************************************/
229 /* Intel 82078 floppy disk controler emulation */
231 static void fdctrl_reset (int do_irq);
232 static void fdctrl_reset_fifo (void);
233 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
234 static void fdctrl_raise_irq (uint8_t status);
236 static uint32_t fdctrl_read_statusB (void *opaque, uint32_t reg);
237 static uint32_t fdctrl_read_dor (void *opaque, uint32_t reg);
238 static void fdctrl_write_dor (void *opaque, uint32_t reg, uint32_t value);
239 static uint32_t fdctrl_read_tape (void *opaque, uint32_t reg);
240 static void fdctrl_write_tape (void *opaque, uint32_t reg, uint32_t value);
241 static uint32_t fdctrl_read_main_status (void *opaque, uint32_t reg);
242 static void fdctrl_write_rate (void *opaque, uint32_t reg, uint32_t value);
243 static uint32_t fdctrl_read_data (void *opaque, uint32_t reg);
244 static void fdctrl_write_data (void *opaque, uint32_t reg, uint32_t value);
245 static uint32_t fdctrl_read_dir (void *opaque, uint32_t reg);
248 FD_CTRL_ACTIVE = 0x01,
249 FD_CTRL_RESET = 0x02,
250 FD_CTRL_SLEEP = 0x04,
265 FD_STATE_STATUS = 0x01,
266 FD_STATE_DATA = 0x02,
267 FD_STATE_STATE = 0x03,
268 FD_STATE_MULTI = 0x10,
269 FD_STATE_SEEK = 0x20,
272 #define FD_STATE(state) ((state) & FD_STATE_STATE)
273 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
274 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
276 typedef struct fdctrl_t {
277 /* Controler's identification */
282 /* Controler state */
288 uint8_t fifo[FD_SECTOR_LEN];
294 /* States kept only to be returned back */
298 /* precompensation */
302 /* Power down config (also with status regB access mode */
308 static fdctrl_t fdctrl;
310 void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base,
311 BlockDriverState **fds)
316 FLOPPY_DPRINTF("init controler\n");
317 memset(&fdctrl, 0, sizeof(fdctrl));
318 fdctrl.version = 0x90; /* Intel 82078 controler */
319 fdctrl.irq_lvl = irq_lvl;
320 fdctrl.dma_chann = dma_chann;
321 fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */
322 if (fdctrl.dma_chann != -1) {
324 DMA_register_channel(dma_chann, fdctrl_transfer_handler, &fdctrl);
328 for (i = 0; i < MAX_FD; i++) {
329 fd_init(&fdctrl.drives[i], fds[i]);
331 bdrv_set_change_cb(fds[i], fd_change_cb, &fdctrl.drives[i]);
334 fdctrl.state = FD_CTRL_ACTIVE;
336 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
338 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
339 cpu_register_physical_memory(base, 0x08, io_mem);
342 register_ioport_read(base + 0x01, 1, 1, fdctrl_read_statusB, NULL);
343 register_ioport_read(base + 0x02, 1, 1, fdctrl_read_dor, NULL);
344 register_ioport_write(base + 0x02, 1, 1, fdctrl_write_dor, NULL);
345 register_ioport_read(base + 0x03, 1, 1, fdctrl_read_tape, NULL);
346 register_ioport_write(base + 0x03, 1, 1, fdctrl_write_tape, NULL);
347 register_ioport_read(base + 0x04, 1, 1, fdctrl_read_main_status, NULL);
348 register_ioport_write(base + 0x04, 1, 1, fdctrl_write_rate, NULL);
349 register_ioport_read(base + 0x05, 1, 1, fdctrl_read_data, NULL);
350 register_ioport_write(base + 0x05, 1, 1, fdctrl_write_data, NULL);
351 register_ioport_read(base + 0x07, 1, 1, fdctrl_read_dir, NULL);
355 for (i = 0; i < MAX_FD; i++) {
356 fd_revalidate(&fdctrl.drives[i]);
360 int fdctrl_get_drive_type(int drive_num)
362 return fdctrl.drives[drive_num].drive;
365 /* Change IRQ state */
366 static void fdctrl_reset_irq (void)
368 if (fdctrl.state & FD_CTRL_INTR) {
369 pic_set_irq(fdctrl.irq_lvl, 0);
370 fdctrl.state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY);
374 static void fdctrl_raise_irq (uint8_t status)
376 if (~(fdctrl.state & FD_CTRL_INTR)) {
377 pic_set_irq(fdctrl.irq_lvl, 1);
378 fdctrl.state |= FD_CTRL_INTR;
380 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
381 fdctrl.int_status = status;
384 /* Reset controler */
385 static void fdctrl_reset (int do_irq)
389 FLOPPY_DPRINTF("reset controler\n");
391 /* Initialise controler */
396 fdctrl.data_state = FD_STATE_CMD;
397 fdctrl.data_dir = FD_DIR_WRITE;
398 for (i = 0; i < MAX_FD; i++)
399 fd_reset(&fdctrl.drives[i]);
402 fdctrl_raise_irq(0x20);
405 /* Status B register : 0x01 (read-only) */
406 static uint32_t fdctrl_read_statusB (void *opaque, uint32_t reg)
409 FLOPPY_DPRINTF("status register: 0x00\n");
414 /* Digital output register : 0x02 */
415 static uint32_t fdctrl_read_dor (void *opaque, uint32_t reg)
417 fdrive_t *cur_drv, *drv0, *drv1;
420 drv0 = &fdctrl.drives[fdctrl.bootsel];
421 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
422 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
423 /* Drive motors state indicators */
424 retval |= drv1->motor << 5;
425 retval |= drv0->motor << 4;
427 retval |= fdctrl.dma_en << 3;
428 /* Reset indicator */
429 retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
431 retval |= fdctrl.cur_drv;
432 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
437 static void fdctrl_write_dor (void *opaque, uint32_t reg, uint32_t value)
439 fdrive_t *drv0, *drv1;
442 drv0 = &fdctrl.drives[fdctrl.bootsel];
443 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
445 if (fdctrl.state & FD_CTRL_RESET) {
446 if (!(value & 0x04)) {
447 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
451 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
452 /* Drive motors state indicators */
463 if (fdctrl.dma_chann != -1)
464 fdctrl.dma_en = 1 - ((value >> 3) & 1);
467 if (!(value & 0x04)) {
468 if (!(fdctrl.state & FD_CTRL_RESET)) {
469 FLOPPY_DPRINTF("controler enter RESET state\n");
470 fdctrl.state |= FD_CTRL_RESET;
474 if (fdctrl.state & FD_CTRL_RESET) {
475 FLOPPY_DPRINTF("controler out of RESET state\n");
476 fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
480 fdctrl.cur_drv = value & 1;
483 /* Tape drive register : 0x03 */
484 static uint32_t fdctrl_read_tape (void *opaque, uint32_t reg)
489 /* Disk boot selection indicator */
490 retval |= fdctrl.bootsel << 2;
491 /* Tape indicators: never allowed */
492 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
497 static void fdctrl_write_tape (void *opaque, uint32_t reg, uint32_t value)
501 if (fdctrl.state & FD_CTRL_RESET) {
502 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
505 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
506 /* Disk boot selection indicator */
507 fdctrl.bootsel = (value >> 2) & 1;
508 /* Tape indicators: never allow */
511 /* Main status register : 0x04 (read) */
512 static uint32_t fdctrl_read_main_status (void *opaque, uint32_t reg)
517 fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
518 if (!(fdctrl.state & FD_CTRL_BUSY)) {
519 /* Data transfer allowed */
521 /* Data transfer direction indicator */
522 if (fdctrl.data_dir == FD_DIR_READ)
525 /* Should handle 0x20 for SPECIFY command */
526 /* Command busy indicator */
527 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA ||
528 FD_STATE(fdctrl.data_state) == FD_STATE_STATUS)
530 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
535 /* Data select rate register : 0x04 (write) */
536 static void fdctrl_write_rate (void *opaque, uint32_t reg, uint32_t value)
540 if (fdctrl.state & FD_CTRL_RESET) {
541 if (reg != 0x2 || !(value & 0x04)) {
542 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
546 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
547 /* Reset: autoclear */
549 fdctrl.state |= FD_CTRL_RESET;
551 fdctrl.state &= ~FD_CTRL_RESET;
554 fdctrl.state |= FD_CTRL_SLEEP;
557 // fdctrl.precomp = (value >> 2) & 0x07;
560 /* Digital input register : 0x07 (read-only) */
561 static uint32_t fdctrl_read_dir (void *opaque, uint32_t reg)
563 fdrive_t *drv0, *drv1;
567 drv0 = &fdctrl.drives[fdctrl.bootsel];
568 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
569 if (drv0->rv || drv1->rv)
572 FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval);
579 /* FIFO state control */
580 static void fdctrl_reset_fifo (void)
582 fdctrl.data_dir = FD_DIR_WRITE;
584 fdctrl.data_state = FD_STATE_CMD;
587 /* Set FIFO status for the host to read */
588 static void fdctrl_set_fifo (int fifo_len, int do_irq)
590 fdctrl.data_dir = FD_DIR_READ;
591 fdctrl.data_len = fifo_len;
593 fdctrl.data_state = FD_STATE_STATUS;
595 fdctrl_raise_irq(0x00);
598 /* Set an error: unimplemented/unknown command */
599 static void fdctrl_unimplemented (void)
602 fdrive_t *cur_drv, *drv0, *drv1;
604 drv0 = &fdctrl.drives[fdctrl.bootsel];
605 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
606 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
607 fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv;
608 fdctrl.fifo[1] = 0x00;
609 fdctrl.fifo[2] = 0x00;
610 fdctrl_set_fifo(3, 1);
616 /* Callback for transfer end (stop or abort) */
617 static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1,
620 fdrive_t *cur_drv, *drv0, *drv1;
622 drv0 = &fdctrl.drives[fdctrl.bootsel];
623 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
624 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
625 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
626 status0, status1, status2,
627 status0 | (cur_drv->head << 1) | fdctrl.cur_drv);
628 fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv;
629 fdctrl.fifo[1] = status1;
630 fdctrl.fifo[2] = status2;
631 fdctrl.fifo[3] = cur_drv->track;
632 fdctrl.fifo[4] = cur_drv->head;
633 fdctrl.fifo[5] = cur_drv->sect;
634 fdctrl.fifo[6] = FD_SECTOR_SC;
635 fdctrl.data_dir = FD_DIR_READ;
636 if (fdctrl.state & FD_CTRL_BUSY)
637 DMA_release_DREQ(fdctrl.dma_chann);
638 fdctrl_set_fifo(7, 1);
641 /* Prepare a data transfer (either DMA or FIFO) */
642 static void fdctrl_start_transfer (int direction)
644 fdrive_t *cur_drv, *drv0, *drv1;
648 drv0 = &fdctrl.drives[fdctrl.bootsel];
649 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
650 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
651 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
655 FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
656 fdctrl.cur_drv, kh, kt, ks,
657 _fd_sector(kh, kt, ks, cur_drv->last_sect));
659 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) {
662 fdctrl_stop_transfer(0x40, 0x00, 0x00);
669 fdctrl_stop_transfer(0x40, 0x80, 0x00);
675 /* No seek enabled */
676 fdctrl_stop_transfer(0x40, 0x00, 0x00);
687 /* Set the FIFO state */
688 fdctrl.data_dir = direction;
690 fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */
691 if (fdctrl.fifo[0] & 0x80)
692 fdctrl.data_state |= FD_STATE_MULTI;
694 fdctrl.data_state |= FD_STATE_SEEK;
697 /* DMA transfer are enabled. Check if DMA channel is well programmed */
698 dma_mode = DMA_get_channel_mode(fdctrl.dma_chann);
699 dma_mode = (dma_mode >> 2) & 3;
700 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction,
701 (128 << fdctrl.fifo[5]) *
702 (cur_drv->last_sect - ks + 1));
703 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
704 direction == FD_DIR_SCANH) && dma_mode == 0) ||
705 (direction == FD_DIR_WRITE && dma_mode == 2) ||
706 (direction == FD_DIR_READ && dma_mode == 1)) {
707 /* No access is allowed until DMA transfer has completed */
708 fdctrl.state |= FD_CTRL_BUSY;
709 /* Now, we just have to wait for the DMA controler to
712 DMA_hold_DREQ(fdctrl.dma_chann);
713 DMA_schedule(fdctrl.dma_chann);
717 FLOPPY_DPRINTF("start non-DMA transfer\n");
718 /* IO based transfer: calculate len */
719 if (fdctrl.fifo[5] == 00) {
720 fdctrl.data_len = fdctrl.fifo[8];
722 fdctrl.data_len = 128 << fdctrl.fifo[5];
723 fdctrl.data_len *= (cur_drv->last_sect - ks + 1);
724 if (fdctrl.fifo[0] & 0x80)
725 fdctrl.data_len *= 2;
727 fdctrl_raise_irq(0x00);
732 /* Prepare a transfer of deleted data */
733 static void fdctrl_start_transfer_del (int direction)
735 /* We don't handle deleted data,
736 * so we don't return *ANYTHING*
738 fdctrl_stop_transfer(0x60, 0x00, 0x00);
741 /* handlers for DMA transfers */
742 /* XXX: the partial transfer logic seems to be broken */
743 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
745 fdrive_t *cur_drv, *drv0, *drv1;
747 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
748 uint8_t tmpbuf[FD_SECTOR_LEN];
751 if (!(fdctrl.state & FD_CTRL_BUSY)) {
752 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
755 drv0 = &fdctrl.drives[fdctrl.bootsel];
756 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
757 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
758 if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL ||
759 fdctrl.data_dir == FD_DIR_SCANH)
761 for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len;
762 fdctrl.data_pos += len) {
763 len = size - fdctrl.data_pos;
764 if (len > FD_SECTOR_LEN)
766 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
767 "(%d-0x%08x)\n", len, size, fdctrl.data_pos,
768 fdctrl.data_len, fdctrl.cur_drv, cur_drv->head,
769 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
770 fd_sector(cur_drv) * 512);
771 if (fdctrl.data_dir != FD_DIR_WRITE) {
772 /* READ & SCAN commands */
773 if (cur_drv->bs == NULL) {
774 fdctrl_stop_transfer(0x40, 0x00, 0x00);
777 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) {
778 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
780 /* Sure, image size is too small... */
781 memset(tmpbuf, 0, FD_SECTOR_LEN);
783 if (fdctrl.data_dir == FD_DIR_READ) {
784 cpu_physical_memory_write(addr + fdctrl.data_pos,
786 if (len < FD_SECTOR_LEN) {
787 memcpy(&fdctrl.fifo[0], tmpbuf + len, FD_SECTOR_LEN - len);
788 memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, len);
792 /* XXX: what to do if not enough data ? */
793 cpu_physical_memory_read(addr + fdctrl.data_pos,
795 if (len < FD_SECTOR_LEN) {
796 memset(&fdctrl.fifo[len], 0, FD_SECTOR_LEN - len);
798 ret = memcmp(tmpbuf, fdctrl.fifo, FD_SECTOR_LEN);
803 if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) ||
804 (ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) {
811 cpu_physical_memory_read(addr + fdctrl.data_pos, tmpbuf, len);
812 if (len < FD_SECTOR_LEN) {
813 memset(tmpbuf + len, 0, FD_SECTOR_LEN - len);
815 if (cur_drv->bs == NULL ||
816 bdrv_write(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) {
817 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
818 fdctrl_stop_transfer(0x60, 0x00, 0x00);
822 if (len == FD_SECTOR_LEN) {
823 /* Seek to next sector */
824 if (cur_drv->sect == cur_drv->last_sect) {
825 if (cur_drv->head == 0) {
832 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
833 cur_drv->head, cur_drv->track, cur_drv->sect,
835 if (cur_drv->head == 0) {
836 FLOPPY_DPRINTF("end transfer\n");
839 if (!FD_MULTI_TRACK(fdctrl.data_state)) {
840 /* Single track read */
841 FLOPPY_DPRINTF("single track transfert: end transfer\n");
847 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
848 cur_drv->head, cur_drv->track, cur_drv->sect,
854 if (fdctrl.data_dir == FD_DIR_SCANE ||
855 fdctrl.data_dir == FD_DIR_SCANL ||
856 fdctrl.data_dir == FD_DIR_SCANH)
858 if (FD_DID_SEEK(fdctrl.data_state))
860 fdctrl_stop_transfer(status0, status1, status2);
863 return fdctrl.data_pos;
866 /* Data register : 0x05 */
867 static uint32_t fdctrl_read_data (void *opaque, uint32_t reg)
869 fdrive_t *cur_drv, *drv0, *drv1;
874 drv0 = &fdctrl.drives[fdctrl.bootsel];
875 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
876 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
877 fdctrl.state &= ~FD_CTRL_SLEEP;
878 if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) {
879 FLOPPY_ERROR("can't read data in CMD state\n");
882 pos = fdctrl.data_pos;
883 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
884 pos %= FD_SECTOR_LEN;
886 len = fdctrl.data_len - fdctrl.data_pos;
887 if (len > FD_SECTOR_LEN)
889 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
893 retval = fdctrl.fifo[pos];
894 if (++fdctrl.data_pos == fdctrl.data_len) {
896 /* Switch from transfert mode to status mode
897 * then from status mode to command mode
899 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
900 fdctrl_stop_transfer(0x20, 0x00, 0x00);
904 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
909 static void fdctrl_write_data (void *opaque, uint32_t reg, uint32_t value)
911 fdrive_t *cur_drv, *drv0, *drv1;
914 drv0 = &fdctrl.drives[fdctrl.bootsel];
915 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
916 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
918 if (fdctrl.state & FD_CTRL_RESET) {
919 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
922 fdctrl.state &= ~FD_CTRL_SLEEP;
923 if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) {
924 FLOPPY_ERROR("can't write data in status mode\n");
927 /* Is it write command time ? */
928 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
929 /* FIFO data write */
930 fdctrl.fifo[fdctrl.data_pos++] = value;
931 if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
932 fdctrl.data_pos == fdctrl.data_len) {
933 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
934 fdctrl.fifo, FD_SECTOR_LEN);
936 /* Switch from transfert mode to status mode
937 * then from status mode to command mode
939 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
940 fdctrl_stop_transfer(0x20, 0x00, 0x00);
943 if (fdctrl.data_pos == 0) {
945 switch (value & 0x5F) {
948 FLOPPY_DPRINTF("READ command\n");
949 /* 8 parameters cmd */
953 /* READ_DELETED variants */
954 FLOPPY_DPRINTF("READ_DELETED command\n");
955 /* 8 parameters cmd */
959 /* SCAN_EQUAL variants */
960 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
961 /* 8 parameters cmd */
965 /* VERIFY variants */
966 FLOPPY_DPRINTF("VERIFY command\n");
967 /* 8 parameters cmd */
971 /* SCAN_LOW_OR_EQUAL variants */
972 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
973 /* 8 parameters cmd */
977 /* SCAN_HIGH_OR_EQUAL variants */
978 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
979 /* 8 parameters cmd */
985 switch (value & 0x7F) {
988 FLOPPY_DPRINTF("WRITE command\n");
989 /* 8 parameters cmd */
993 /* WRITE_DELETED variants */
994 FLOPPY_DPRINTF("WRITE_DELETED command\n");
995 /* 8 parameters cmd */
1004 FLOPPY_DPRINTF("SPECIFY command\n");
1005 /* 1 parameter cmd */
1006 fdctrl.data_len = 3;
1009 /* SENSE_DRIVE_STATUS */
1010 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1011 /* 1 parameter cmd */
1012 fdctrl.data_len = 2;
1016 FLOPPY_DPRINTF("RECALIBRATE command\n");
1017 /* 1 parameter cmd */
1018 fdctrl.data_len = 2;
1021 /* SENSE_INTERRUPT_STATUS */
1022 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1024 /* No parameters cmd: returns status if no interrupt */
1026 fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv;
1027 fdctrl.fifo[1] = cur_drv->track;
1028 fdctrl_set_fifo(2, 0);
1032 FLOPPY_DPRINTF("DUMPREG command\n");
1033 /* Drives position */
1034 fdctrl.fifo[0] = drv0->track;
1035 fdctrl.fifo[1] = drv1->track;
1039 fdctrl.fifo[4] = fdctrl.timer0;
1040 fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en;
1041 fdctrl.fifo[6] = cur_drv->last_sect;
1042 fdctrl.fifo[7] = (fdctrl.lock << 7) |
1043 (cur_drv->perpendicular << 2);
1044 fdctrl.fifo[8] = fdctrl.config;
1045 fdctrl.fifo[9] = fdctrl.precomp_trk;
1046 fdctrl_set_fifo(10, 0);
1050 FLOPPY_DPRINTF("SEEK command\n");
1051 /* 2 parameters cmd */
1052 fdctrl.data_len = 3;
1056 FLOPPY_DPRINTF("VERSION command\n");
1057 /* No parameters cmd */
1058 /* Controler's version */
1059 fdctrl.fifo[0] = fdctrl.version;
1060 fdctrl_set_fifo(1, 1);
1063 /* PERPENDICULAR_MODE */
1064 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1065 /* 1 parameter cmd */
1066 fdctrl.data_len = 2;
1070 FLOPPY_DPRINTF("CONFIGURE command\n");
1071 /* 3 parameters cmd */
1072 fdctrl.data_len = 4;
1076 FLOPPY_DPRINTF("UNLOCK command\n");
1077 /* No parameters cmd */
1080 fdctrl_set_fifo(1, 0);
1083 /* POWERDOWN_MODE */
1084 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1085 /* 2 parameters cmd */
1086 fdctrl.data_len = 3;
1090 FLOPPY_DPRINTF("PART_ID command\n");
1091 /* No parameters cmd */
1092 fdctrl.fifo[0] = 0x41; /* Stepping 1 */
1093 fdctrl_set_fifo(1, 0);
1097 FLOPPY_DPRINTF("SAVE command\n");
1098 /* No parameters cmd */
1101 /* Drives position */
1102 fdctrl.fifo[2] = drv0->track;
1103 fdctrl.fifo[3] = drv1->track;
1107 fdctrl.fifo[6] = fdctrl.timer0;
1108 fdctrl.fifo[7] = fdctrl.timer1;
1109 fdctrl.fifo[8] = cur_drv->last_sect;
1110 fdctrl.fifo[9] = (fdctrl.lock << 7) |
1111 (cur_drv->perpendicular << 2);
1112 fdctrl.fifo[10] = fdctrl.config;
1113 fdctrl.fifo[11] = fdctrl.precomp_trk;
1114 fdctrl.fifo[12] = fdctrl.pwrd;
1115 fdctrl.fifo[13] = 0;
1116 fdctrl.fifo[14] = 0;
1117 fdctrl_set_fifo(15, 1);
1121 FLOPPY_DPRINTF("OPTION command\n");
1122 /* 1 parameter cmd */
1123 fdctrl.data_len = 2;
1127 FLOPPY_DPRINTF("READ_TRACK command\n");
1128 /* 8 parameters cmd */
1129 fdctrl.data_len = 9;
1133 FLOPPY_DPRINTF("READ_ID command\n");
1134 /* 1 parameter cmd */
1135 fdctrl.data_len = 2;
1139 FLOPPY_DPRINTF("RESTORE command\n");
1140 /* 17 parameters cmd */
1141 fdctrl.data_len = 18;
1145 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1146 /* 5 parameters cmd */
1147 fdctrl.data_len = 9;
1150 /* DRIVE_SPECIFICATION_COMMAND */
1151 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1152 /* 5 parameters cmd */
1153 fdctrl.data_len = 6;
1156 /* RELATIVE_SEEK_OUT */
1157 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1158 /* 2 parameters cmd */
1159 fdctrl.data_len = 3;
1163 FLOPPY_DPRINTF("LOCK command\n");
1164 /* No parameters cmd */
1166 fdctrl.fifo[0] = 0x10;
1167 fdctrl_set_fifo(1, 1);
1170 /* FORMAT_AND_WRITE */
1171 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1172 /* 10 parameters cmd */
1173 fdctrl.data_len = 11;
1176 /* RELATIVE_SEEK_IN */
1177 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1178 /* 2 parameters cmd */
1179 fdctrl.data_len = 3;
1182 /* Unknown command */
1183 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1184 fdctrl_unimplemented();
1189 fdctrl.fifo[fdctrl.data_pos] = value;
1190 if (++fdctrl.data_pos == fdctrl.data_len) {
1191 /* We now have all parameters
1192 * and will be able to treat the command
1194 switch (fdctrl.fifo[0] & 0x1F) {
1198 FLOPPY_DPRINTF("treat READ command\n");
1199 fdctrl_start_transfer(FD_DIR_READ);
1203 /* READ_DELETED variants */
1204 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1205 FLOPPY_ERROR("treat READ_DELETED command\n");
1206 fdctrl_start_transfer_del(1);
1209 /* VERIFY variants */
1210 // FLOPPY_DPRINTF("treat VERIFY command\n");
1211 FLOPPY_ERROR("treat VERIFY command\n");
1212 fdctrl_stop_transfer(0x20, 0x00, 0x00);
1215 /* SCAN_EQUAL variants */
1216 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1217 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1218 fdctrl_start_transfer(FD_DIR_SCANE);
1221 /* SCAN_LOW_OR_EQUAL variants */
1222 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1223 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1224 fdctrl_start_transfer(FD_DIR_SCANL);
1227 /* SCAN_HIGH_OR_EQUAL variants */
1228 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1229 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1230 fdctrl_start_transfer(FD_DIR_SCANH);
1235 switch (fdctrl.fifo[0] & 0x3F) {
1237 /* WRITE variants */
1238 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]);
1239 fdctrl_start_transfer(FD_DIR_WRITE);
1242 /* WRITE_DELETED variants */
1243 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1244 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1245 fdctrl_start_transfer_del(FD_DIR_WRITE);
1250 switch (fdctrl.fifo[0]) {
1253 FLOPPY_DPRINTF("treat SPECIFY command\n");
1254 fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF;
1255 fdctrl.timer1 = fdctrl.fifo[1] >> 1;
1256 /* No result back */
1257 fdctrl_reset_fifo();
1260 /* SENSE_DRIVE_STATUS */
1261 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1262 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1263 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1264 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1265 /* 1 Byte status back */
1266 fdctrl.fifo[0] = (cur_drv->ro << 6) |
1267 (cur_drv->track == 0 ? 0x10 : 0x00) |
1269 fdctrl_set_fifo(1, 0);
1273 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1274 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1275 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1276 fd_recalibrate(cur_drv);
1277 fdctrl_reset_fifo();
1278 /* Raise Interrupt */
1279 fdctrl_raise_irq(0x20);
1283 FLOPPY_DPRINTF("treat SEEK command\n");
1284 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1285 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1286 if (fdctrl.fifo[2] <= cur_drv->track)
1290 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1291 if (fdctrl.fifo[2] > cur_drv->max_track) {
1292 fdctrl_raise_irq(0x60);
1294 cur_drv->track = fdctrl.fifo[2];
1295 fdctrl_reset_fifo();
1296 /* Raise Interrupt */
1297 fdctrl_raise_irq(0x20);
1301 /* PERPENDICULAR_MODE */
1302 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1303 if (fdctrl.fifo[1] & 0x80)
1304 cur_drv->perpendicular = fdctrl.fifo[1] & 0x7;
1305 /* No result back */
1306 fdctrl_reset_fifo();
1310 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1311 fdctrl.config = fdctrl.fifo[2];
1312 fdctrl.precomp_trk = fdctrl.fifo[3];
1313 /* No result back */
1314 fdctrl_reset_fifo();
1317 /* POWERDOWN_MODE */
1318 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1319 fdctrl.pwrd = fdctrl.fifo[1];
1320 fdctrl.fifo[0] = fdctrl.fifo[1];
1321 fdctrl_set_fifo(1, 1);
1325 FLOPPY_DPRINTF("treat OPTION command\n");
1326 /* No result back */
1327 fdctrl_reset_fifo();
1331 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1332 FLOPPY_ERROR("treat READ_TRACK command\n");
1333 fdctrl_unimplemented();
1337 // FLOPPY_DPRINTF("treat READ_ID command\n");
1338 FLOPPY_ERROR("treat READ_ID command\n");
1339 fdctrl_stop_transfer(0x00, 0x00, 0x00);
1343 FLOPPY_DPRINTF("treat RESTORE command\n");
1344 /* Drives position */
1345 drv0->track = fdctrl.fifo[3];
1346 drv1->track = fdctrl.fifo[4];
1348 fdctrl.timer0 = fdctrl.fifo[7];
1349 fdctrl.timer1 = fdctrl.fifo[8];
1350 cur_drv->last_sect = fdctrl.fifo[9];
1351 fdctrl.lock = fdctrl.fifo[10] >> 7;
1352 cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF;
1353 fdctrl.config = fdctrl.fifo[11];
1354 fdctrl.precomp_trk = fdctrl.fifo[12];
1355 fdctrl.pwrd = fdctrl.fifo[13];
1356 fdctrl_reset_fifo();
1360 // FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1361 FLOPPY_ERROR("treat FORMAT_TRACK command\n");
1362 fdctrl_unimplemented();
1365 /* DRIVE_SPECIFICATION_COMMAND */
1366 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1367 if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) {
1368 /* Command parameters done */
1369 if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) {
1370 fdctrl.fifo[0] = fdctrl.fifo[1];
1373 fdctrl_set_fifo(4, 1);
1375 fdctrl_reset_fifo();
1377 } else if (fdctrl.data_len > 7) {
1379 fdctrl.fifo[0] = 0x80 |
1380 (cur_drv->head << 2) | fdctrl.cur_drv;
1381 fdctrl_set_fifo(1, 1);
1385 /* RELATIVE_SEEK_OUT */
1386 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1387 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1388 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1389 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1390 if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) {
1392 fdctrl_raise_irq(0x70);
1394 cur_drv->track += fdctrl.fifo[2];
1396 fdctrl_reset_fifo();
1397 fdctrl_raise_irq(0x20);
1401 /* FORMAT_AND_WRITE */
1402 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1403 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1404 fdctrl_unimplemented();
1407 /* RELATIVE_SEEK_IN */
1408 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1409 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1410 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1411 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1412 if (fdctrl.fifo[2] > cur_drv->track) {
1414 fdctrl_raise_irq(0x60);
1416 fdctrl_reset_fifo();
1417 cur_drv->track -= fdctrl.fifo[2];
1419 /* Raise Interrupt */
1420 fdctrl_raise_irq(0x20);