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
26 /********************************************************/
27 /* debug Floppy devices */
28 //#define DEBUG_FLOPPY
31 #define FLOPPY_DPRINTF(fmt, args...) \
32 do { printf("FLOPPY: " fmt , ##args); } while (0)
34 #define FLOPPY_DPRINTF(fmt, args...)
37 #define FLOPPY_ERROR(fmt, args...) \
38 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
40 /********************************************************/
41 /* Floppy drive emulation */
43 /* Will always be a fixed parameter for us */
44 #define FD_SECTOR_LEN 512
45 #define FD_SECTOR_SC 2 /* Sector size code */
47 /* Floppy disk drive emulation */
48 typedef enum fdisk_type_t {
49 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
50 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
51 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
52 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
53 FDRIVE_DISK_NONE = 0x05, /* No disk */
56 typedef enum fdrive_type_t {
57 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
58 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
59 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
60 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
63 typedef enum fdrive_flags_t {
64 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
65 FDRIVE_REVALIDATE = 0x02, /* Revalidated */
68 typedef enum fdisk_flags_t {
69 FDISK_DBL_SIDES = 0x01,
72 typedef struct fdrive_t {
76 fdrive_flags_t drflags;
77 uint8_t perpendicular; /* 2.88 MB access mode */
82 /* Last operation status */
83 uint8_t dir; /* Direction */
84 uint8_t rw; /* Read/write */
87 uint8_t last_sect; /* Nb sector per track */
88 uint8_t max_track; /* Nb of tracks */
89 uint16_t bps; /* Bytes per sector */
90 uint8_t ro; /* Is read-only */
93 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
98 drv->drive = FDRIVE_DRV_144;
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 drv->drflags &= ~FDRIVE_REVALIDATE;
239 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
240 ro = bdrv_is_read_only(drv->bs);
241 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
242 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
243 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
244 nb_heads - 1, max_track, last_sect);
246 bdrv_get_geometry(drv->bs, &nb_sectors);
250 parse = &fd_formats[i];
251 if (parse->drive == FDRIVE_DRV_NONE)
253 if (drv->drive == parse->drive ||
254 drv->drive == FDRIVE_DRV_NONE) {
255 size = (parse->max_head + 1) * parse->max_track *
257 if (nb_sectors == size) {
261 if (first_match == -1)
266 if (first_match == -1)
270 parse = &fd_formats[match];
272 nb_heads = parse->max_head + 1;
273 max_track = parse->max_track;
274 last_sect = parse->last_sect;
275 drv->drive = parse->drive;
276 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
277 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
280 drv->flags &= ~FDISK_DBL_SIDES;
282 drv->flags |= FDISK_DBL_SIDES;
284 drv->max_track = max_track;
285 drv->last_sect = last_sect;
288 FLOPPY_DPRINTF("No disk in drive\n");
291 drv->flags &= ~FDISK_DBL_SIDES;
293 drv->drflags |= FDRIVE_REVALIDATE;
297 static void fd_start (fdrive_t *drv)
299 drv->drflags |= FDRIVE_MOTOR_ON;
302 static void fd_stop (fdrive_t *drv)
304 drv->drflags &= ~FDRIVE_MOTOR_ON;
307 /* Re-initialise a drives (motor off, repositioned) */
308 static void fd_reset (fdrive_t *drv)
314 /********************************************************/
315 /* Intel 82078 floppy disk controler emulation */
317 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
318 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
319 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
320 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
321 static void fdctrl_result_timer(void *opaque);
323 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
324 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
325 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
326 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
327 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
328 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
329 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
330 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
331 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
332 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
335 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
336 FD_CTRL_RESET = 0x02,
337 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
338 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
352 FD_STATE_STATUS = 0x01,
353 FD_STATE_DATA = 0x02,
354 FD_STATE_STATE = 0x03,
355 FD_STATE_MULTI = 0x10,
356 FD_STATE_SEEK = 0x20,
357 FD_STATE_FORMAT = 0x40,
360 #define FD_STATE(state) ((state) & FD_STATE_STATE)
361 #define FD_SET_STATE(state, new_state) \
362 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
363 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
364 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
365 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
369 /* Controler's identification */
375 /* Controler state */
376 QEMUTimer *result_timer;
382 uint8_t fifo[FD_SECTOR_LEN];
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) {
409 retval = fdctrl_read_statusB(fdctrl);
412 retval = fdctrl_read_dor(fdctrl);
415 retval = fdctrl_read_tape(fdctrl);
418 retval = fdctrl_read_main_status(fdctrl);
421 retval = fdctrl_read_data(fdctrl);
424 retval = fdctrl_read_dir(fdctrl);
427 retval = (uint32_t)(-1);
430 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
435 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
437 fdctrl_t *fdctrl = opaque;
439 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
441 switch (reg & 0x07) {
443 fdctrl_write_dor(fdctrl, value);
446 fdctrl_write_tape(fdctrl, value);
449 fdctrl_write_rate(fdctrl, value);
452 fdctrl_write_data(fdctrl, value);
459 static void fd_change_cb (void *opaque)
461 fdrive_t *drv = opaque;
463 FLOPPY_DPRINTF("disk change\n");
467 fdctrl_reset_fifo(drv->fdctrl);
468 fdctrl_raise_irq(drv->fdctrl, 0x20);
472 fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
474 BlockDriverState **fds)
480 FLOPPY_DPRINTF("init controler\n");
481 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
484 fdctrl->result_timer = qemu_new_timer(vm_clock,
485 fdctrl_result_timer, fdctrl);
487 fdctrl->version = 0x90; /* Intel 82078 controler */
488 fdctrl->irq_lvl = irq_lvl;
489 fdctrl->dma_chann = dma_chann;
490 fdctrl->io_base = io_base;
491 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
492 if (fdctrl->dma_chann != -1) {
494 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
498 for (i = 0; i < 2; i++) {
499 fd_init(&fdctrl->drives[i], fds[i]);
501 bdrv_set_change_cb(fds[i],
502 &fd_change_cb, &fdctrl->drives[i]);
505 fdctrl_reset(fdctrl, 0);
506 fdctrl->state = FD_CTRL_ACTIVE;
508 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
510 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
511 cpu_register_physical_memory(base, 0x08, io_mem);
514 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
515 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
516 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
517 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
519 for (i = 0; i < 2; i++) {
520 fd_revalidate(&fdctrl->drives[i]);
526 /* XXX: may change if moved to bdrv */
527 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
529 return fdctrl->drives[drive_num].drive;
532 /* Change IRQ state */
533 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
535 FLOPPY_DPRINTF("Reset interrupt\n");
536 pic_set_irq(fdctrl->irq_lvl, 0);
537 fdctrl->state &= ~FD_CTRL_INTR;
540 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
542 if (~(fdctrl->state & FD_CTRL_INTR)) {
543 pic_set_irq(fdctrl->irq_lvl, 1);
544 fdctrl->state |= FD_CTRL_INTR;
546 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
547 fdctrl->int_status = status;
550 /* Reset controler */
551 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
555 FLOPPY_DPRINTF("reset controler\n");
556 fdctrl_reset_irq(fdctrl);
557 /* Initialise controler */
560 fdctrl->data_pos = 0;
561 fdctrl->data_len = 0;
562 fdctrl->data_state = FD_STATE_CMD;
563 fdctrl->data_dir = FD_DIR_WRITE;
564 for (i = 0; i < MAX_FD; i++)
565 fd_reset(&fdctrl->drives[i]);
566 fdctrl_reset_fifo(fdctrl);
568 fdctrl_raise_irq(fdctrl, 0xc0);
571 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
573 return &fdctrl->drives[fdctrl->bootsel];
576 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
578 return &fdctrl->drives[1 - fdctrl->bootsel];
581 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
583 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
586 /* Status B register : 0x01 (read-only) */
587 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
589 FLOPPY_DPRINTF("status register: 0x00\n");
593 /* Digital output register : 0x02 */
594 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
598 /* Drive motors state indicators */
599 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
601 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
604 retval |= fdctrl->dma_en << 3;
605 /* Reset indicator */
606 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
608 retval |= fdctrl->cur_drv;
609 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
614 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
617 if (fdctrl->state & FD_CTRL_RESET) {
618 if (!(value & 0x04)) {
619 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
623 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
624 /* Drive motors state indicators */
626 fd_start(drv1(fdctrl));
628 fd_stop(drv1(fdctrl));
630 fd_start(drv0(fdctrl));
632 fd_stop(drv0(fdctrl));
635 if (fdctrl->dma_chann != -1)
636 fdctrl->dma_en = 1 - ((value >> 3) & 1);
639 if (!(value & 0x04)) {
640 if (!(fdctrl->state & FD_CTRL_RESET)) {
641 FLOPPY_DPRINTF("controler enter RESET state\n");
642 fdctrl->state |= FD_CTRL_RESET;
645 if (fdctrl->state & FD_CTRL_RESET) {
646 FLOPPY_DPRINTF("controler out of RESET state\n");
647 fdctrl_reset(fdctrl, 1);
648 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
652 fdctrl->cur_drv = value & 1;
655 /* Tape drive register : 0x03 */
656 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
660 /* Disk boot selection indicator */
661 retval |= fdctrl->bootsel << 2;
662 /* Tape indicators: never allowed */
663 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
668 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
671 if (fdctrl->state & FD_CTRL_RESET) {
672 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
675 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
676 /* Disk boot selection indicator */
677 fdctrl->bootsel = (value >> 2) & 1;
678 /* Tape indicators: never allow */
681 /* Main status register : 0x04 (read) */
682 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
686 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
687 if (!(fdctrl->state & FD_CTRL_BUSY)) {
688 /* Data transfer allowed */
690 /* Data transfer direction indicator */
691 if (fdctrl->data_dir == FD_DIR_READ)
694 /* Should handle 0x20 for SPECIFY command */
695 /* Command busy indicator */
696 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
697 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
699 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
704 /* Data select rate register : 0x04 (write) */
705 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
708 if (fdctrl->state & FD_CTRL_RESET) {
709 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
712 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
713 /* Reset: autoclear */
715 fdctrl->state |= FD_CTRL_RESET;
716 fdctrl_reset(fdctrl, 1);
717 fdctrl->state &= ~FD_CTRL_RESET;
720 fdctrl->state |= FD_CTRL_SLEEP;
721 fdctrl_reset(fdctrl, 1);
723 // fdctrl.precomp = (value >> 2) & 0x07;
726 /* Digital input register : 0x07 (read-only) */
727 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
731 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
732 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
735 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
736 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
737 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
742 /* FIFO state control */
743 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
745 fdctrl->data_dir = FD_DIR_WRITE;
746 fdctrl->data_pos = 0;
747 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
750 /* Set FIFO status for the host to read */
751 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
753 fdctrl->data_dir = FD_DIR_READ;
754 fdctrl->data_len = fifo_len;
755 fdctrl->data_pos = 0;
756 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
758 fdctrl_raise_irq(fdctrl, 0x00);
761 /* Set an error: unimplemented/unknown command */
762 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
767 cur_drv = get_cur_drv(fdctrl);
768 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl->cur_drv;
769 fdctrl->fifo[1] = 0x00;
770 fdctrl->fifo[2] = 0x00;
771 fdctrl_set_fifo(fdctrl, 3, 1);
773 // fdctrl_reset_fifo(fdctrl);
774 fdctrl->fifo[0] = 0x80;
775 fdctrl_set_fifo(fdctrl, 1, 0);
779 /* Callback for transfer end (stop or abort) */
780 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
781 uint8_t status1, uint8_t status2)
785 cur_drv = get_cur_drv(fdctrl);
786 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
787 status0, status1, status2,
788 status0 | (cur_drv->head << 1) | fdctrl->cur_drv);
789 fdctrl->fifo[0] = status0 | (cur_drv->head << 1) | fdctrl->cur_drv;
790 fdctrl->fifo[1] = status1;
791 fdctrl->fifo[2] = status2;
792 fdctrl->fifo[3] = cur_drv->track;
793 fdctrl->fifo[4] = cur_drv->head;
794 fdctrl->fifo[5] = cur_drv->sect;
795 fdctrl->fifo[6] = FD_SECTOR_SC;
796 fdctrl->data_dir = FD_DIR_READ;
797 if (fdctrl->state & FD_CTRL_BUSY) {
798 DMA_release_DREQ(fdctrl->dma_chann);
799 fdctrl->state &= ~FD_CTRL_BUSY;
801 fdctrl_set_fifo(fdctrl, 7, 1);
804 /* Prepare a data transfer (either DMA or FIFO) */
805 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
811 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
812 cur_drv = get_cur_drv(fdctrl);
813 kt = fdctrl->fifo[2];
814 kh = fdctrl->fifo[3];
815 ks = fdctrl->fifo[4];
816 FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
817 fdctrl->cur_drv, kh, kt, ks,
818 _fd_sector(kh, kt, ks, cur_drv->last_sect));
820 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
823 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
824 fdctrl->fifo[3] = kt;
825 fdctrl->fifo[4] = kh;
826 fdctrl->fifo[5] = ks;
830 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
831 fdctrl->fifo[3] = kt;
832 fdctrl->fifo[4] = kh;
833 fdctrl->fifo[5] = ks;
836 /* No seek enabled */
837 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
838 fdctrl->fifo[3] = kt;
839 fdctrl->fifo[4] = kh;
840 fdctrl->fifo[5] = ks;
848 /* Set the FIFO state */
849 fdctrl->data_dir = direction;
850 fdctrl->data_pos = 0;
851 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
852 if (fdctrl->fifo[0] & 0x80)
853 fdctrl->data_state |= FD_STATE_MULTI;
855 fdctrl->data_state &= ~FD_STATE_MULTI;
857 fdctrl->data_state |= FD_STATE_SEEK;
859 fdctrl->data_state &= ~FD_STATE_SEEK;
860 if (fdctrl->fifo[5] == 00) {
861 fdctrl->data_len = fdctrl->fifo[8];
864 fdctrl->data_len = 128 << fdctrl->fifo[5];
865 tmp = (cur_drv->last_sect - ks + 1);
866 if (fdctrl->fifo[0] & 0x80)
867 tmp += cur_drv->last_sect;
868 fdctrl->data_len *= tmp;
870 if (fdctrl->dma_en) {
872 /* DMA transfer are enabled. Check if DMA channel is well programmed */
873 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
874 dma_mode = (dma_mode >> 2) & 3;
875 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
877 (128 << fdctrl->fifo[5]) *
878 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
879 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
880 direction == FD_DIR_SCANH) && dma_mode == 0) ||
881 (direction == FD_DIR_WRITE && dma_mode == 2) ||
882 (direction == FD_DIR_READ && dma_mode == 1)) {
883 /* No access is allowed until DMA transfer has completed */
884 fdctrl->state |= FD_CTRL_BUSY;
885 /* Now, we just have to wait for the DMA controler to
888 DMA_hold_DREQ(fdctrl->dma_chann);
889 DMA_schedule(fdctrl->dma_chann);
892 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
895 FLOPPY_DPRINTF("start non-DMA transfer\n");
896 /* IO based transfer: calculate len */
897 fdctrl_raise_irq(fdctrl, 0x00);
902 /* Prepare a transfer of deleted data */
903 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
905 /* We don't handle deleted data,
906 * so we don't return *ANYTHING*
908 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
911 /* handlers for DMA transfers */
912 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
916 int len, start_pos, rel_pos;
917 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
920 if (!(fdctrl->state & FD_CTRL_BUSY)) {
921 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
924 cur_drv = get_cur_drv(fdctrl);
925 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
926 fdctrl->data_dir == FD_DIR_SCANH)
928 if (size > fdctrl->data_len)
929 size = fdctrl->data_len;
930 if (cur_drv->bs == NULL) {
931 if (fdctrl->data_dir == FD_DIR_WRITE)
932 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
934 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
938 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
939 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < size;) {
940 len = size - fdctrl->data_pos;
941 if (len + rel_pos > FD_SECTOR_LEN)
942 len = FD_SECTOR_LEN - rel_pos;
943 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
944 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
945 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
946 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
947 fd_sector(cur_drv) * 512, addr);
948 if (fdctrl->data_dir != FD_DIR_WRITE ||
949 len < FD_SECTOR_LEN || rel_pos != 0) {
950 /* READ & SCAN commands and realign to a sector for WRITE */
951 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
952 fdctrl->fifo, 1) < 0) {
953 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
955 /* Sure, image size is too small... */
956 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
959 switch (fdctrl->data_dir) {
962 cpu_physical_memory_write(addr + fdctrl->data_pos,
963 fdctrl->fifo + rel_pos, len);
967 cpu_physical_memory_read(addr + fdctrl->data_pos,
968 fdctrl->fifo + rel_pos, len);
969 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
970 fdctrl->fifo, 1) < 0) {
971 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
972 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
979 uint8_t tmpbuf[FD_SECTOR_LEN];
981 cpu_physical_memory_read(addr + fdctrl->data_pos,
983 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
988 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
989 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
996 fdctrl->data_pos += len;
997 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
999 /* Seek to next sector */
1001 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1002 cur_drv->head, cur_drv->track, cur_drv->sect,
1004 fdctrl->data_pos - size);
1005 if (cur_drv->sect > cur_drv->last_sect) {
1007 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1008 if (cur_drv->head == 0 &&
1009 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1014 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1021 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1022 cur_drv->head, cur_drv->track,
1023 cur_drv->sect, fd_sector(cur_drv));
1028 len = fdctrl->data_pos - start_pos;
1029 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1030 fdctrl->data_pos, len, fdctrl->data_len);
1031 if (fdctrl->data_dir == FD_DIR_SCANE ||
1032 fdctrl->data_dir == FD_DIR_SCANL ||
1033 fdctrl->data_dir == FD_DIR_SCANH)
1035 if (FD_DID_SEEK(fdctrl->data_state))
1037 fdctrl->data_len -= len;
1038 // if (fdctrl->data_len == 0)
1039 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1045 /* Data register : 0x05 */
1046 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1049 uint32_t retval = 0;
1052 cur_drv = get_cur_drv(fdctrl);
1053 fdctrl->state &= ~FD_CTRL_SLEEP;
1054 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1055 FLOPPY_ERROR("can't read data in CMD state\n");
1058 pos = fdctrl->data_pos;
1059 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1060 pos %= FD_SECTOR_LEN;
1062 len = fdctrl->data_len - fdctrl->data_pos;
1063 if (len > FD_SECTOR_LEN)
1064 len = FD_SECTOR_LEN;
1065 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1069 retval = fdctrl->fifo[pos];
1070 if (++fdctrl->data_pos == fdctrl->data_len) {
1071 fdctrl->data_pos = 0;
1072 /* Switch from transfert mode to status mode
1073 * then from status mode to command mode
1075 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1076 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1078 fdctrl_reset_fifo(fdctrl);
1079 fdctrl_reset_irq(fdctrl);
1082 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1087 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1093 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1094 cur_drv = get_cur_drv(fdctrl);
1095 kt = fdctrl->fifo[6];
1096 kh = fdctrl->fifo[7];
1097 ks = fdctrl->fifo[8];
1098 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1099 fdctrl->cur_drv, kh, kt, ks,
1100 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1102 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1105 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1106 fdctrl->fifo[3] = kt;
1107 fdctrl->fifo[4] = kh;
1108 fdctrl->fifo[5] = ks;
1112 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1113 fdctrl->fifo[3] = kt;
1114 fdctrl->fifo[4] = kh;
1115 fdctrl->fifo[5] = ks;
1118 /* No seek enabled */
1119 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1120 fdctrl->fifo[3] = kt;
1121 fdctrl->fifo[4] = kh;
1122 fdctrl->fifo[5] = ks;
1126 fdctrl->data_state |= FD_STATE_SEEK;
1131 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1132 if (cur_drv->bs == NULL ||
1133 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1134 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1135 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1137 if (cur_drv->sect == cur_drv->last_sect) {
1138 fdctrl->data_state &= ~FD_STATE_FORMAT;
1139 /* Last sector done */
1140 if (FD_DID_SEEK(fdctrl->data_state))
1141 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1143 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1146 fdctrl->data_pos = 0;
1147 fdctrl->data_len = 4;
1152 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1156 cur_drv = get_cur_drv(fdctrl);
1158 if (fdctrl->state & FD_CTRL_RESET) {
1159 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
1162 fdctrl->state &= ~FD_CTRL_SLEEP;
1163 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1164 FLOPPY_ERROR("can't write data in status mode\n");
1167 /* Is it write command time ? */
1168 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1169 /* FIFO data write */
1170 fdctrl->fifo[fdctrl->data_pos++] = value;
1171 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1172 fdctrl->data_pos == fdctrl->data_len) {
1173 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1174 fdctrl->fifo, FD_SECTOR_LEN);
1176 /* Switch from transfert mode to status mode
1177 * then from status mode to command mode
1179 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1180 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1183 if (fdctrl->data_pos == 0) {
1185 switch (value & 0x5F) {
1188 FLOPPY_DPRINTF("READ command\n");
1189 /* 8 parameters cmd */
1190 fdctrl->data_len = 9;
1193 /* READ_DELETED variants */
1194 FLOPPY_DPRINTF("READ_DELETED command\n");
1195 /* 8 parameters cmd */
1196 fdctrl->data_len = 9;
1199 /* SCAN_EQUAL variants */
1200 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1201 /* 8 parameters cmd */
1202 fdctrl->data_len = 9;
1205 /* VERIFY variants */
1206 FLOPPY_DPRINTF("VERIFY command\n");
1207 /* 8 parameters cmd */
1208 fdctrl->data_len = 9;
1211 /* SCAN_LOW_OR_EQUAL variants */
1212 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1213 /* 8 parameters cmd */
1214 fdctrl->data_len = 9;
1217 /* SCAN_HIGH_OR_EQUAL variants */
1218 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1219 /* 8 parameters cmd */
1220 fdctrl->data_len = 9;
1225 switch (value & 0x7F) {
1227 /* WRITE variants */
1228 FLOPPY_DPRINTF("WRITE command\n");
1229 /* 8 parameters cmd */
1230 fdctrl->data_len = 9;
1233 /* WRITE_DELETED variants */
1234 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1235 /* 8 parameters cmd */
1236 fdctrl->data_len = 9;
1244 FLOPPY_DPRINTF("SPECIFY command\n");
1245 /* 1 parameter cmd */
1246 fdctrl->data_len = 3;
1249 /* SENSE_DRIVE_STATUS */
1250 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1251 /* 1 parameter cmd */
1252 fdctrl->data_len = 2;
1256 FLOPPY_DPRINTF("RECALIBRATE command\n");
1257 /* 1 parameter cmd */
1258 fdctrl->data_len = 2;
1261 /* SENSE_INTERRUPT_STATUS */
1262 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1263 fdctrl->int_status);
1264 /* No parameters cmd: returns status if no interrupt */
1266 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1267 fdctrl->fifo[1] = cur_drv->track;
1268 fdctrl_set_fifo(fdctrl, 2, 0);
1269 fdctrl_reset_irq(fdctrl);
1270 fdctrl->int_status = 0xC0;
1274 FLOPPY_DPRINTF("DUMPREG command\n");
1275 /* Drives position */
1276 fdctrl->fifo[0] = drv0(fdctrl)->track;
1277 fdctrl->fifo[1] = drv1(fdctrl)->track;
1278 fdctrl->fifo[2] = 0;
1279 fdctrl->fifo[3] = 0;
1281 fdctrl->fifo[4] = fdctrl->timer0;
1282 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1283 fdctrl->fifo[6] = cur_drv->last_sect;
1284 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1285 (cur_drv->perpendicular << 2);
1286 fdctrl->fifo[8] = fdctrl->config;
1287 fdctrl->fifo[9] = fdctrl->precomp_trk;
1288 fdctrl_set_fifo(fdctrl, 10, 0);
1292 FLOPPY_DPRINTF("SEEK command\n");
1293 /* 2 parameters cmd */
1294 fdctrl->data_len = 3;
1298 FLOPPY_DPRINTF("VERSION command\n");
1299 /* No parameters cmd */
1300 /* Controler's version */
1301 fdctrl->fifo[0] = fdctrl->version;
1302 fdctrl_set_fifo(fdctrl, 1, 1);
1305 /* PERPENDICULAR_MODE */
1306 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1307 /* 1 parameter cmd */
1308 fdctrl->data_len = 2;
1312 FLOPPY_DPRINTF("CONFIGURE command\n");
1313 /* 3 parameters cmd */
1314 fdctrl->data_len = 4;
1318 FLOPPY_DPRINTF("UNLOCK command\n");
1319 /* No parameters cmd */
1321 fdctrl->fifo[0] = 0;
1322 fdctrl_set_fifo(fdctrl, 1, 0);
1325 /* POWERDOWN_MODE */
1326 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1327 /* 2 parameters cmd */
1328 fdctrl->data_len = 3;
1332 FLOPPY_DPRINTF("PART_ID command\n");
1333 /* No parameters cmd */
1334 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1335 fdctrl_set_fifo(fdctrl, 1, 0);
1339 FLOPPY_DPRINTF("SAVE command\n");
1340 /* No parameters cmd */
1341 fdctrl->fifo[0] = 0;
1342 fdctrl->fifo[1] = 0;
1343 /* Drives position */
1344 fdctrl->fifo[2] = drv0(fdctrl)->track;
1345 fdctrl->fifo[3] = drv1(fdctrl)->track;
1346 fdctrl->fifo[4] = 0;
1347 fdctrl->fifo[5] = 0;
1349 fdctrl->fifo[6] = fdctrl->timer0;
1350 fdctrl->fifo[7] = fdctrl->timer1;
1351 fdctrl->fifo[8] = cur_drv->last_sect;
1352 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1353 (cur_drv->perpendicular << 2);
1354 fdctrl->fifo[10] = fdctrl->config;
1355 fdctrl->fifo[11] = fdctrl->precomp_trk;
1356 fdctrl->fifo[12] = fdctrl->pwrd;
1357 fdctrl->fifo[13] = 0;
1358 fdctrl->fifo[14] = 0;
1359 fdctrl_set_fifo(fdctrl, 15, 1);
1363 FLOPPY_DPRINTF("OPTION command\n");
1364 /* 1 parameter cmd */
1365 fdctrl->data_len = 2;
1369 FLOPPY_DPRINTF("READ_TRACK command\n");
1370 /* 8 parameters cmd */
1371 fdctrl->data_len = 9;
1375 FLOPPY_DPRINTF("READ_ID command\n");
1376 /* 1 parameter cmd */
1377 fdctrl->data_len = 2;
1381 FLOPPY_DPRINTF("RESTORE command\n");
1382 /* 17 parameters cmd */
1383 fdctrl->data_len = 18;
1387 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1388 /* 5 parameters cmd */
1389 fdctrl->data_len = 6;
1392 /* DRIVE_SPECIFICATION_COMMAND */
1393 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1394 /* 5 parameters cmd */
1395 fdctrl->data_len = 6;
1398 /* RELATIVE_SEEK_OUT */
1399 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1400 /* 2 parameters cmd */
1401 fdctrl->data_len = 3;
1405 FLOPPY_DPRINTF("LOCK command\n");
1406 /* No parameters cmd */
1408 fdctrl->fifo[0] = 0x10;
1409 fdctrl_set_fifo(fdctrl, 1, 1);
1412 /* FORMAT_AND_WRITE */
1413 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1414 /* 10 parameters cmd */
1415 fdctrl->data_len = 11;
1418 /* RELATIVE_SEEK_IN */
1419 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1420 /* 2 parameters cmd */
1421 fdctrl->data_len = 3;
1424 /* Unknown command */
1425 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1426 fdctrl_unimplemented(fdctrl);
1431 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1432 fdctrl->fifo[fdctrl->data_pos] = value;
1433 if (++fdctrl->data_pos == fdctrl->data_len) {
1434 /* We now have all parameters
1435 * and will be able to treat the command
1437 if (fdctrl->data_state & FD_STATE_FORMAT) {
1438 fdctrl_format_sector(fdctrl);
1441 switch (fdctrl->fifo[0] & 0x1F) {
1445 FLOPPY_DPRINTF("treat READ command\n");
1446 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1450 /* READ_DELETED variants */
1451 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1452 FLOPPY_ERROR("treat READ_DELETED command\n");
1453 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1456 /* VERIFY variants */
1457 // FLOPPY_DPRINTF("treat VERIFY command\n");
1458 FLOPPY_ERROR("treat VERIFY command\n");
1459 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1462 /* SCAN_EQUAL variants */
1463 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1464 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1465 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1468 /* SCAN_LOW_OR_EQUAL variants */
1469 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1470 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1471 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1474 /* SCAN_HIGH_OR_EQUAL variants */
1475 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1476 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1477 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1482 switch (fdctrl->fifo[0] & 0x3F) {
1484 /* WRITE variants */
1485 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1486 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1489 /* WRITE_DELETED variants */
1490 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1491 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1492 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1497 switch (fdctrl->fifo[0]) {
1500 FLOPPY_DPRINTF("treat SPECIFY command\n");
1501 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1502 fdctrl->timer1 = fdctrl->fifo[1] >> 1;
1503 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1504 /* No result back */
1505 fdctrl_reset_fifo(fdctrl);
1508 /* SENSE_DRIVE_STATUS */
1509 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1510 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1511 cur_drv = get_cur_drv(fdctrl);
1512 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1513 /* 1 Byte status back */
1514 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1515 (cur_drv->track == 0 ? 0x10 : 0x00) |
1517 fdctrl_set_fifo(fdctrl, 1, 0);
1521 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1522 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1523 cur_drv = get_cur_drv(fdctrl);
1524 fd_recalibrate(cur_drv);
1525 fdctrl_reset_fifo(fdctrl);
1526 /* Raise Interrupt */
1527 fdctrl_raise_irq(fdctrl, 0x20);
1531 FLOPPY_DPRINTF("treat SEEK command\n");
1532 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1533 cur_drv = get_cur_drv(fdctrl);
1535 if (fdctrl->fifo[2] <= cur_drv->track)
1539 fdctrl_reset_fifo(fdctrl);
1540 if (fdctrl->fifo[2] > cur_drv->max_track) {
1541 fdctrl_raise_irq(fdctrl, 0x60);
1543 cur_drv->track = fdctrl->fifo[2];
1544 /* Raise Interrupt */
1545 fdctrl_raise_irq(fdctrl, 0x20);
1549 /* PERPENDICULAR_MODE */
1550 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1551 if (fdctrl->fifo[1] & 0x80)
1552 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1553 /* No result back */
1554 fdctrl_reset_fifo(fdctrl);
1558 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1559 fdctrl->config = fdctrl->fifo[2];
1560 fdctrl->precomp_trk = fdctrl->fifo[3];
1561 /* No result back */
1562 fdctrl_reset_fifo(fdctrl);
1565 /* POWERDOWN_MODE */
1566 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1567 fdctrl->pwrd = fdctrl->fifo[1];
1568 fdctrl->fifo[0] = fdctrl->fifo[1];
1569 fdctrl_set_fifo(fdctrl, 1, 1);
1573 FLOPPY_DPRINTF("treat OPTION command\n");
1574 /* No result back */
1575 fdctrl_reset_fifo(fdctrl);
1579 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1580 FLOPPY_ERROR("treat READ_TRACK command\n");
1581 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1585 FLOPPY_DPRINTF("treat READ_ID command\n");
1586 /* XXX: should set main status register to busy */
1587 qemu_mod_timer(fdctrl->result_timer,
1588 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1592 FLOPPY_DPRINTF("treat RESTORE command\n");
1593 /* Drives position */
1594 drv0(fdctrl)->track = fdctrl->fifo[3];
1595 drv1(fdctrl)->track = fdctrl->fifo[4];
1597 fdctrl->timer0 = fdctrl->fifo[7];
1598 fdctrl->timer1 = fdctrl->fifo[8];
1599 cur_drv->last_sect = fdctrl->fifo[9];
1600 fdctrl->lock = fdctrl->fifo[10] >> 7;
1601 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1602 fdctrl->config = fdctrl->fifo[11];
1603 fdctrl->precomp_trk = fdctrl->fifo[12];
1604 fdctrl->pwrd = fdctrl->fifo[13];
1605 fdctrl_reset_fifo(fdctrl);
1609 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1610 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1611 cur_drv = get_cur_drv(fdctrl);
1612 fdctrl->data_state |= FD_STATE_FORMAT;
1613 if (fdctrl->fifo[0] & 0x80)
1614 fdctrl->data_state |= FD_STATE_MULTI;
1616 fdctrl->data_state &= ~FD_STATE_MULTI;
1617 fdctrl->data_state &= ~FD_STATE_SEEK;
1619 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1621 cur_drv->last_sect =
1622 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1623 fdctrl->fifo[3] / 2;
1625 cur_drv->last_sect = fdctrl->fifo[3];
1627 /* Bochs BIOS is buggy and don't send format informations
1628 * for each sector. So, pretend all's done right now...
1630 fdctrl->data_state &= ~FD_STATE_FORMAT;
1631 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1634 /* DRIVE_SPECIFICATION_COMMAND */
1635 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1636 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1637 /* Command parameters done */
1638 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1639 fdctrl->fifo[0] = fdctrl->fifo[1];
1640 fdctrl->fifo[2] = 0;
1641 fdctrl->fifo[3] = 0;
1642 fdctrl_set_fifo(fdctrl, 4, 1);
1644 fdctrl_reset_fifo(fdctrl);
1646 } else if (fdctrl->data_len > 7) {
1648 fdctrl->fifo[0] = 0x80 |
1649 (cur_drv->head << 2) | fdctrl->cur_drv;
1650 fdctrl_set_fifo(fdctrl, 1, 1);
1654 /* RELATIVE_SEEK_OUT */
1655 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1656 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1657 cur_drv = get_cur_drv(fdctrl);
1660 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1661 cur_drv->track = cur_drv->max_track - 1;
1663 cur_drv->track += fdctrl->fifo[2];
1665 fdctrl_reset_fifo(fdctrl);
1666 fdctrl_raise_irq(fdctrl, 0x20);
1669 /* FORMAT_AND_WRITE */
1670 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1671 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1672 fdctrl_unimplemented(fdctrl);
1675 /* RELATIVE_SEEK_IN */
1676 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1677 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1678 cur_drv = get_cur_drv(fdctrl);
1681 if (fdctrl->fifo[2] > cur_drv->track) {
1684 cur_drv->track -= fdctrl->fifo[2];
1686 fdctrl_reset_fifo(fdctrl);
1687 /* Raise Interrupt */
1688 fdctrl_raise_irq(fdctrl, 0x20);
1694 static void fdctrl_result_timer(void *opaque)
1696 fdctrl_t *fdctrl = opaque;
1697 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);