2 * QEMU Floppy disk emulator (Intel 82078)
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)
97 drv->drive = FDRIVE_DRV_NONE;
99 drv->perpendicular = 0;
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,
123 if (track > drv->max_track ||
124 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
125 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
126 head, track, sect, 1,
127 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
128 drv->max_track, drv->last_sect);
131 if (sect > drv->last_sect) {
132 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
133 head, track, sect, 1,
134 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
135 drv->max_track, drv->last_sect);
138 sector = _fd_sector(head, track, sect, drv->last_sect);
140 if (sector != fd_sector(drv)) {
143 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
144 head, track, sect, 1, drv->max_track, drv->last_sect);
149 if (drv->track != track)
158 /* Set drive back to track 0 */
159 static void fd_recalibrate (fdrive_t *drv)
161 FLOPPY_DPRINTF("recalibrate\n");
169 /* Recognize floppy formats */
170 typedef struct fd_format_t {
176 const unsigned char *str;
179 static fd_format_t fd_formats[] = {
180 /* First entry is default format */
181 /* 1.44 MB 3"1/2 floppy disks */
182 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
183 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
184 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
185 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
186 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
187 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
188 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
189 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
190 /* 2.88 MB 3"1/2 floppy disks */
191 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
192 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
193 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
194 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
195 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
196 /* 720 kB 3"1/2 floppy disks */
197 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
198 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
199 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
200 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
201 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
202 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
203 /* 1.2 MB 5"1/4 floppy disks */
204 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
205 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
206 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
207 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
208 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
209 /* 720 kB 5"1/4 floppy disks */
210 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
211 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
212 /* 360 kB 5"1/4 floppy disks */
213 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
214 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
215 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
216 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
217 /* 320 kB 5"1/4 floppy disks */
218 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
219 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
220 /* 360 kB must match 5"1/4 better than 3"1/2... */
221 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
223 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
226 /* Revalidate a disk drive after a disk change */
227 static void fd_revalidate (fdrive_t *drv)
230 int64_t nb_sectors, size;
231 int i, first_match, match;
232 int nb_heads, max_track, last_sect, ro;
234 FLOPPY_DPRINTF("revalidate\n");
235 drv->drflags &= ~FDRIVE_REVALIDATE;
236 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
237 ro = bdrv_is_read_only(drv->bs);
238 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
239 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
240 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
241 nb_heads - 1, max_track, last_sect);
243 bdrv_get_geometry(drv->bs, &nb_sectors);
247 parse = &fd_formats[i];
248 if (parse->drive == FDRIVE_DRV_NONE)
250 if (drv->drive == parse->drive ||
251 drv->drive == FDRIVE_DRV_NONE) {
252 size = (parse->max_head + 1) * parse->max_track *
254 if (nb_sectors == size) {
258 if (first_match == -1)
263 if (first_match == -1)
267 parse = &fd_formats[match];
269 nb_heads = parse->max_head + 1;
270 max_track = parse->max_track;
271 last_sect = parse->last_sect;
272 drv->drive = parse->drive;
273 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
274 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
277 drv->flags &= ~FDISK_DBL_SIDES;
279 drv->flags |= FDISK_DBL_SIDES;
281 drv->max_track = max_track;
282 drv->last_sect = last_sect;
285 FLOPPY_DPRINTF("No disk in drive\n");
288 drv->flags &= ~FDISK_DBL_SIDES;
290 drv->drflags |= FDRIVE_REVALIDATE;
294 static void fd_start (fdrive_t *drv)
296 drv->drflags |= FDRIVE_MOTOR_ON;
299 static void fd_stop (fdrive_t *drv)
301 drv->drflags &= ~FDRIVE_MOTOR_ON;
304 /* Re-initialise a drives (motor off, repositioned) */
305 static void fd_reset (fdrive_t *drv)
311 /********************************************************/
312 /* Intel 82078 floppy disk controler emulation */
314 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
315 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
316 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
317 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
318 static void fdctrl_result_timer(void *opaque);
320 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
321 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
322 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
323 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
324 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
325 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
326 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
327 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
328 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
329 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
332 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
333 FD_CTRL_RESET = 0x02,
334 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
335 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
349 FD_STATE_STATUS = 0x01,
350 FD_STATE_DATA = 0x02,
351 FD_STATE_STATE = 0x03,
352 FD_STATE_MULTI = 0x10,
353 FD_STATE_SEEK = 0x20,
354 FD_STATE_FORMAT = 0x40,
357 #define FD_STATE(state) ((state) & FD_STATE_STATE)
358 #define FD_SET_STATE(state, new_state) \
359 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
360 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
361 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
362 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
366 /* Controler's identification */
372 /* Controler state */
373 QEMUTimer *result_timer;
379 uint8_t fifo[FD_SECTOR_LEN];
385 uint8_t eot; /* last wanted sector */
386 /* States kept only to be returned back */
390 /* precompensation */
394 /* Power down config (also with status regB access mode */
400 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
402 fdctrl_t *fdctrl = opaque;
405 switch (reg & 0x07) {
407 retval = fdctrl_read_statusB(fdctrl);
410 retval = fdctrl_read_dor(fdctrl);
413 retval = fdctrl_read_tape(fdctrl);
416 retval = fdctrl_read_main_status(fdctrl);
419 retval = fdctrl_read_data(fdctrl);
422 retval = fdctrl_read_dir(fdctrl);
425 retval = (uint32_t)(-1);
428 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
433 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
435 fdctrl_t *fdctrl = opaque;
437 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
439 switch (reg & 0x07) {
441 fdctrl_write_dor(fdctrl, value);
444 fdctrl_write_tape(fdctrl, value);
447 fdctrl_write_rate(fdctrl, value);
450 fdctrl_write_data(fdctrl, value);
457 static void fd_change_cb (void *opaque)
459 fdrive_t *drv = opaque;
461 FLOPPY_DPRINTF("disk change\n");
465 fdctrl_reset_fifo(drv->fdctrl);
466 fdctrl_raise_irq(drv->fdctrl, 0x20);
470 fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
472 BlockDriverState **fds)
478 FLOPPY_DPRINTF("init controler\n");
479 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
482 fdctrl->result_timer = qemu_new_timer(vm_clock,
483 fdctrl_result_timer, fdctrl);
485 fdctrl->version = 0x90; /* Intel 82078 controler */
486 fdctrl->irq_lvl = irq_lvl;
487 fdctrl->dma_chann = dma_chann;
488 fdctrl->io_base = io_base;
489 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
490 if (fdctrl->dma_chann != -1) {
492 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
496 for (i = 0; i < 2; i++) {
497 fd_init(&fdctrl->drives[i], fds[i]);
499 bdrv_set_change_cb(fds[i],
500 &fd_change_cb, &fdctrl->drives[i]);
503 fdctrl_reset(fdctrl, 0);
504 fdctrl->state = FD_CTRL_ACTIVE;
506 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
508 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
509 cpu_register_physical_memory(base, 0x08, io_mem);
512 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
513 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
514 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
515 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
517 for (i = 0; i < 2; i++) {
518 fd_revalidate(&fdctrl->drives[i]);
524 /* XXX: may change if moved to bdrv */
525 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
527 return fdctrl->drives[drive_num].drive;
530 /* Change IRQ state */
531 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
533 FLOPPY_DPRINTF("Reset interrupt\n");
534 pic_set_irq(fdctrl->irq_lvl, 0);
535 fdctrl->state &= ~FD_CTRL_INTR;
538 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
540 if (~(fdctrl->state & FD_CTRL_INTR)) {
541 pic_set_irq(fdctrl->irq_lvl, 1);
542 fdctrl->state |= FD_CTRL_INTR;
544 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
545 fdctrl->int_status = status;
548 /* Reset controler */
549 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
553 FLOPPY_DPRINTF("reset controler\n");
554 fdctrl_reset_irq(fdctrl);
555 /* Initialise controler */
558 fdctrl->data_pos = 0;
559 fdctrl->data_len = 0;
560 fdctrl->data_state = FD_STATE_CMD;
561 fdctrl->data_dir = FD_DIR_WRITE;
562 for (i = 0; i < MAX_FD; i++)
563 fd_reset(&fdctrl->drives[i]);
564 fdctrl_reset_fifo(fdctrl);
566 fdctrl_raise_irq(fdctrl, 0xc0);
569 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
571 return &fdctrl->drives[fdctrl->bootsel];
574 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
576 return &fdctrl->drives[1 - fdctrl->bootsel];
579 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
581 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
584 /* Status B register : 0x01 (read-only) */
585 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
587 FLOPPY_DPRINTF("status register: 0x00\n");
591 /* Digital output register : 0x02 */
592 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
596 /* Drive motors state indicators */
597 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
599 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
602 retval |= fdctrl->dma_en << 3;
603 /* Reset indicator */
604 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
606 retval |= fdctrl->cur_drv;
607 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
612 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
615 if (fdctrl->state & FD_CTRL_RESET) {
616 if (!(value & 0x04)) {
617 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
621 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
622 /* Drive motors state indicators */
624 fd_start(drv1(fdctrl));
626 fd_stop(drv1(fdctrl));
628 fd_start(drv0(fdctrl));
630 fd_stop(drv0(fdctrl));
633 if (fdctrl->dma_chann != -1)
634 fdctrl->dma_en = 1 - ((value >> 3) & 1);
637 if (!(value & 0x04)) {
638 if (!(fdctrl->state & FD_CTRL_RESET)) {
639 FLOPPY_DPRINTF("controler enter RESET state\n");
640 fdctrl->state |= FD_CTRL_RESET;
643 if (fdctrl->state & FD_CTRL_RESET) {
644 FLOPPY_DPRINTF("controler out of RESET state\n");
645 fdctrl_reset(fdctrl, 1);
646 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
650 fdctrl->cur_drv = value & 1;
653 /* Tape drive register : 0x03 */
654 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
658 /* Disk boot selection indicator */
659 retval |= fdctrl->bootsel << 2;
660 /* Tape indicators: never allowed */
661 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
666 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
669 if (fdctrl->state & FD_CTRL_RESET) {
670 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
673 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
674 /* Disk boot selection indicator */
675 fdctrl->bootsel = (value >> 2) & 1;
676 /* Tape indicators: never allow */
679 /* Main status register : 0x04 (read) */
680 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
684 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
685 if (!(fdctrl->state & FD_CTRL_BUSY)) {
686 /* Data transfer allowed */
688 /* Data transfer direction indicator */
689 if (fdctrl->data_dir == FD_DIR_READ)
692 /* Should handle 0x20 for SPECIFY command */
693 /* Command busy indicator */
694 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
695 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
697 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
702 /* Data select rate register : 0x04 (write) */
703 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
706 if (fdctrl->state & FD_CTRL_RESET) {
707 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
710 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
711 /* Reset: autoclear */
713 fdctrl->state |= FD_CTRL_RESET;
714 fdctrl_reset(fdctrl, 1);
715 fdctrl->state &= ~FD_CTRL_RESET;
718 fdctrl->state |= FD_CTRL_SLEEP;
719 fdctrl_reset(fdctrl, 1);
721 // fdctrl.precomp = (value >> 2) & 0x07;
724 /* Digital input register : 0x07 (read-only) */
725 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
729 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
730 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
733 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
734 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
735 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
740 /* FIFO state control */
741 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
743 fdctrl->data_dir = FD_DIR_WRITE;
744 fdctrl->data_pos = 0;
745 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
748 /* Set FIFO status for the host to read */
749 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
751 fdctrl->data_dir = FD_DIR_READ;
752 fdctrl->data_len = fifo_len;
753 fdctrl->data_pos = 0;
754 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
756 fdctrl_raise_irq(fdctrl, 0x00);
759 /* Set an error: unimplemented/unknown command */
760 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
765 cur_drv = get_cur_drv(fdctrl);
766 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
767 fdctrl->fifo[1] = 0x00;
768 fdctrl->fifo[2] = 0x00;
769 fdctrl_set_fifo(fdctrl, 3, 1);
771 // fdctrl_reset_fifo(fdctrl);
772 fdctrl->fifo[0] = 0x80;
773 fdctrl_set_fifo(fdctrl, 1, 0);
777 /* Callback for transfer end (stop or abort) */
778 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
779 uint8_t status1, uint8_t status2)
783 cur_drv = get_cur_drv(fdctrl);
784 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
785 status0, status1, status2,
786 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
787 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
788 fdctrl->fifo[1] = status1;
789 fdctrl->fifo[2] = status2;
790 fdctrl->fifo[3] = cur_drv->track;
791 fdctrl->fifo[4] = cur_drv->head;
792 fdctrl->fifo[5] = cur_drv->sect;
793 fdctrl->fifo[6] = FD_SECTOR_SC;
794 fdctrl->data_dir = FD_DIR_READ;
795 if (fdctrl->state & FD_CTRL_BUSY) {
796 DMA_release_DREQ(fdctrl->dma_chann);
797 fdctrl->state &= ~FD_CTRL_BUSY;
799 fdctrl_set_fifo(fdctrl, 7, 1);
802 /* Prepare a data transfer (either DMA or FIFO) */
803 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
809 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
810 cur_drv = get_cur_drv(fdctrl);
811 kt = fdctrl->fifo[2];
812 kh = fdctrl->fifo[3];
813 ks = fdctrl->fifo[4];
814 FLOPPY_DPRINTF("Start tranfer at %d %d %02x %02x (%d)\n",
815 fdctrl->cur_drv, kh, kt, ks,
816 _fd_sector(kh, kt, ks, cur_drv->last_sect));
818 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
821 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
822 fdctrl->fifo[3] = kt;
823 fdctrl->fifo[4] = kh;
824 fdctrl->fifo[5] = ks;
828 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
829 fdctrl->fifo[3] = kt;
830 fdctrl->fifo[4] = kh;
831 fdctrl->fifo[5] = ks;
834 /* No seek enabled */
835 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
836 fdctrl->fifo[3] = kt;
837 fdctrl->fifo[4] = kh;
838 fdctrl->fifo[5] = ks;
846 /* Set the FIFO state */
847 fdctrl->data_dir = direction;
848 fdctrl->data_pos = 0;
849 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
850 if (fdctrl->fifo[0] & 0x80)
851 fdctrl->data_state |= FD_STATE_MULTI;
853 fdctrl->data_state &= ~FD_STATE_MULTI;
855 fdctrl->data_state |= FD_STATE_SEEK;
857 fdctrl->data_state &= ~FD_STATE_SEEK;
858 if (fdctrl->fifo[5] == 00) {
859 fdctrl->data_len = fdctrl->fifo[8];
862 fdctrl->data_len = 128 << fdctrl->fifo[5];
863 tmp = (cur_drv->last_sect - ks + 1);
864 if (fdctrl->fifo[0] & 0x80)
865 tmp += cur_drv->last_sect;
866 fdctrl->data_len *= tmp;
868 fdctrl->eot = fdctrl->fifo[6];
869 if (fdctrl->dma_en) {
871 /* DMA transfer are enabled. Check if DMA channel is well programmed */
872 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
873 dma_mode = (dma_mode >> 2) & 3;
874 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
876 (128 << fdctrl->fifo[5]) *
877 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
878 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
879 direction == FD_DIR_SCANH) && dma_mode == 0) ||
880 (direction == FD_DIR_WRITE && dma_mode == 2) ||
881 (direction == FD_DIR_READ && dma_mode == 1)) {
882 /* No access is allowed until DMA transfer has completed */
883 fdctrl->state |= FD_CTRL_BUSY;
884 /* Now, we just have to wait for the DMA controler to
887 DMA_hold_DREQ(fdctrl->dma_chann);
888 DMA_schedule(fdctrl->dma_chann);
891 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
894 FLOPPY_DPRINTF("start non-DMA transfer\n");
895 /* IO based transfer: calculate len */
896 fdctrl_raise_irq(fdctrl, 0x00);
901 /* Prepare a transfer of deleted data */
902 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
904 /* We don't handle deleted data,
905 * so we don't return *ANYTHING*
907 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
910 /* handlers for DMA transfers */
911 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
915 int len, start_pos, rel_pos;
916 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
919 if (!(fdctrl->state & FD_CTRL_BUSY)) {
920 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
923 cur_drv = get_cur_drv(fdctrl);
924 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
925 fdctrl->data_dir == FD_DIR_SCANH)
927 if (size > fdctrl->data_len)
928 size = fdctrl->data_len;
929 if (cur_drv->bs == NULL) {
930 if (fdctrl->data_dir == FD_DIR_WRITE)
931 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
933 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
937 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
938 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < size;) {
939 len = size - fdctrl->data_pos;
940 if (len + rel_pos > FD_SECTOR_LEN)
941 len = FD_SECTOR_LEN - rel_pos;
942 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
943 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
944 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
945 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
946 fd_sector(cur_drv) * 512, addr);
947 if (fdctrl->data_dir != FD_DIR_WRITE ||
948 len < FD_SECTOR_LEN || rel_pos != 0) {
949 /* READ & SCAN commands and realign to a sector for WRITE */
950 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
951 fdctrl->fifo, 1) < 0) {
952 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
954 /* Sure, image size is too small... */
955 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
958 switch (fdctrl->data_dir) {
961 cpu_physical_memory_write(addr + fdctrl->data_pos,
962 fdctrl->fifo + rel_pos, len);
966 cpu_physical_memory_read(addr + fdctrl->data_pos,
967 fdctrl->fifo + rel_pos, len);
968 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
969 fdctrl->fifo, 1) < 0) {
970 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
971 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
978 uint8_t tmpbuf[FD_SECTOR_LEN];
980 cpu_physical_memory_read(addr + fdctrl->data_pos,
982 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
987 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
988 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
995 fdctrl->data_pos += len;
996 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
998 /* Seek to next sector */
999 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1000 cur_drv->head, cur_drv->track, cur_drv->sect,
1002 fdctrl->data_pos - size);
1003 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1005 if (cur_drv->sect >= cur_drv->last_sect ||
1006 cur_drv->sect == fdctrl->eot) {
1008 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1009 if (cur_drv->head == 0 &&
1010 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1015 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1022 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1023 cur_drv->head, cur_drv->track,
1024 cur_drv->sect, fd_sector(cur_drv));
1031 len = fdctrl->data_pos - start_pos;
1032 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1033 fdctrl->data_pos, len, fdctrl->data_len);
1034 if (fdctrl->data_dir == FD_DIR_SCANE ||
1035 fdctrl->data_dir == FD_DIR_SCANL ||
1036 fdctrl->data_dir == FD_DIR_SCANH)
1038 if (FD_DID_SEEK(fdctrl->data_state))
1040 fdctrl->data_len -= len;
1041 // if (fdctrl->data_len == 0)
1042 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1048 /* Data register : 0x05 */
1049 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1052 uint32_t retval = 0;
1055 cur_drv = get_cur_drv(fdctrl);
1056 fdctrl->state &= ~FD_CTRL_SLEEP;
1057 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1058 FLOPPY_ERROR("can't read data in CMD state\n");
1061 pos = fdctrl->data_pos;
1062 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1063 pos %= FD_SECTOR_LEN;
1065 len = fdctrl->data_len - fdctrl->data_pos;
1066 if (len > FD_SECTOR_LEN)
1067 len = FD_SECTOR_LEN;
1068 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1072 retval = fdctrl->fifo[pos];
1073 if (++fdctrl->data_pos == fdctrl->data_len) {
1074 fdctrl->data_pos = 0;
1075 /* Switch from transfer mode to status mode
1076 * then from status mode to command mode
1078 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1079 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1081 fdctrl_reset_fifo(fdctrl);
1082 fdctrl_reset_irq(fdctrl);
1085 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1090 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1096 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1097 cur_drv = get_cur_drv(fdctrl);
1098 kt = fdctrl->fifo[6];
1099 kh = fdctrl->fifo[7];
1100 ks = fdctrl->fifo[8];
1101 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1102 fdctrl->cur_drv, kh, kt, ks,
1103 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1105 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1108 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1109 fdctrl->fifo[3] = kt;
1110 fdctrl->fifo[4] = kh;
1111 fdctrl->fifo[5] = ks;
1115 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1116 fdctrl->fifo[3] = kt;
1117 fdctrl->fifo[4] = kh;
1118 fdctrl->fifo[5] = ks;
1121 /* No seek enabled */
1122 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1123 fdctrl->fifo[3] = kt;
1124 fdctrl->fifo[4] = kh;
1125 fdctrl->fifo[5] = ks;
1129 fdctrl->data_state |= FD_STATE_SEEK;
1134 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1135 if (cur_drv->bs == NULL ||
1136 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1137 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1138 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1140 if (cur_drv->sect == cur_drv->last_sect) {
1141 fdctrl->data_state &= ~FD_STATE_FORMAT;
1142 /* Last sector done */
1143 if (FD_DID_SEEK(fdctrl->data_state))
1144 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1146 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1149 fdctrl->data_pos = 0;
1150 fdctrl->data_len = 4;
1155 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1159 cur_drv = get_cur_drv(fdctrl);
1161 if (fdctrl->state & FD_CTRL_RESET) {
1162 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
1165 fdctrl->state &= ~FD_CTRL_SLEEP;
1166 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1167 FLOPPY_ERROR("can't write data in status mode\n");
1170 /* Is it write command time ? */
1171 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1172 /* FIFO data write */
1173 fdctrl->fifo[fdctrl->data_pos++] = value;
1174 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1175 fdctrl->data_pos == fdctrl->data_len) {
1176 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1177 fdctrl->fifo, FD_SECTOR_LEN);
1179 /* Switch from transfer mode to status mode
1180 * then from status mode to command mode
1182 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1183 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1186 if (fdctrl->data_pos == 0) {
1188 switch (value & 0x5F) {
1191 FLOPPY_DPRINTF("READ command\n");
1192 /* 8 parameters cmd */
1193 fdctrl->data_len = 9;
1196 /* READ_DELETED variants */
1197 FLOPPY_DPRINTF("READ_DELETED command\n");
1198 /* 8 parameters cmd */
1199 fdctrl->data_len = 9;
1202 /* SCAN_EQUAL variants */
1203 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1204 /* 8 parameters cmd */
1205 fdctrl->data_len = 9;
1208 /* VERIFY variants */
1209 FLOPPY_DPRINTF("VERIFY command\n");
1210 /* 8 parameters cmd */
1211 fdctrl->data_len = 9;
1214 /* SCAN_LOW_OR_EQUAL variants */
1215 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1216 /* 8 parameters cmd */
1217 fdctrl->data_len = 9;
1220 /* SCAN_HIGH_OR_EQUAL variants */
1221 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1222 /* 8 parameters cmd */
1223 fdctrl->data_len = 9;
1228 switch (value & 0x7F) {
1230 /* WRITE variants */
1231 FLOPPY_DPRINTF("WRITE command\n");
1232 /* 8 parameters cmd */
1233 fdctrl->data_len = 9;
1236 /* WRITE_DELETED variants */
1237 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1238 /* 8 parameters cmd */
1239 fdctrl->data_len = 9;
1247 FLOPPY_DPRINTF("SPECIFY command\n");
1248 /* 1 parameter cmd */
1249 fdctrl->data_len = 3;
1252 /* SENSE_DRIVE_STATUS */
1253 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1254 /* 1 parameter cmd */
1255 fdctrl->data_len = 2;
1259 FLOPPY_DPRINTF("RECALIBRATE command\n");
1260 /* 1 parameter cmd */
1261 fdctrl->data_len = 2;
1264 /* SENSE_INTERRUPT_STATUS */
1265 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1266 fdctrl->int_status);
1267 /* No parameters cmd: returns status if no interrupt */
1269 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1270 fdctrl->fifo[1] = cur_drv->track;
1271 fdctrl_set_fifo(fdctrl, 2, 0);
1272 fdctrl_reset_irq(fdctrl);
1273 fdctrl->int_status = 0xC0;
1277 FLOPPY_DPRINTF("DUMPREG command\n");
1278 /* Drives position */
1279 fdctrl->fifo[0] = drv0(fdctrl)->track;
1280 fdctrl->fifo[1] = drv1(fdctrl)->track;
1281 fdctrl->fifo[2] = 0;
1282 fdctrl->fifo[3] = 0;
1284 fdctrl->fifo[4] = fdctrl->timer0;
1285 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1286 fdctrl->fifo[6] = cur_drv->last_sect;
1287 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1288 (cur_drv->perpendicular << 2);
1289 fdctrl->fifo[8] = fdctrl->config;
1290 fdctrl->fifo[9] = fdctrl->precomp_trk;
1291 fdctrl_set_fifo(fdctrl, 10, 0);
1295 FLOPPY_DPRINTF("SEEK command\n");
1296 /* 2 parameters cmd */
1297 fdctrl->data_len = 3;
1301 FLOPPY_DPRINTF("VERSION command\n");
1302 /* No parameters cmd */
1303 /* Controler's version */
1304 fdctrl->fifo[0] = fdctrl->version;
1305 fdctrl_set_fifo(fdctrl, 1, 1);
1308 /* PERPENDICULAR_MODE */
1309 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1310 /* 1 parameter cmd */
1311 fdctrl->data_len = 2;
1315 FLOPPY_DPRINTF("CONFIGURE command\n");
1316 /* 3 parameters cmd */
1317 fdctrl->data_len = 4;
1321 FLOPPY_DPRINTF("UNLOCK command\n");
1322 /* No parameters cmd */
1324 fdctrl->fifo[0] = 0;
1325 fdctrl_set_fifo(fdctrl, 1, 0);
1328 /* POWERDOWN_MODE */
1329 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1330 /* 2 parameters cmd */
1331 fdctrl->data_len = 3;
1335 FLOPPY_DPRINTF("PART_ID command\n");
1336 /* No parameters cmd */
1337 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1338 fdctrl_set_fifo(fdctrl, 1, 0);
1342 FLOPPY_DPRINTF("SAVE command\n");
1343 /* No parameters cmd */
1344 fdctrl->fifo[0] = 0;
1345 fdctrl->fifo[1] = 0;
1346 /* Drives position */
1347 fdctrl->fifo[2] = drv0(fdctrl)->track;
1348 fdctrl->fifo[3] = drv1(fdctrl)->track;
1349 fdctrl->fifo[4] = 0;
1350 fdctrl->fifo[5] = 0;
1352 fdctrl->fifo[6] = fdctrl->timer0;
1353 fdctrl->fifo[7] = fdctrl->timer1;
1354 fdctrl->fifo[8] = cur_drv->last_sect;
1355 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1356 (cur_drv->perpendicular << 2);
1357 fdctrl->fifo[10] = fdctrl->config;
1358 fdctrl->fifo[11] = fdctrl->precomp_trk;
1359 fdctrl->fifo[12] = fdctrl->pwrd;
1360 fdctrl->fifo[13] = 0;
1361 fdctrl->fifo[14] = 0;
1362 fdctrl_set_fifo(fdctrl, 15, 1);
1366 FLOPPY_DPRINTF("OPTION command\n");
1367 /* 1 parameter cmd */
1368 fdctrl->data_len = 2;
1372 FLOPPY_DPRINTF("READ_TRACK command\n");
1373 /* 8 parameters cmd */
1374 fdctrl->data_len = 9;
1378 FLOPPY_DPRINTF("READ_ID command\n");
1379 /* 1 parameter cmd */
1380 fdctrl->data_len = 2;
1384 FLOPPY_DPRINTF("RESTORE command\n");
1385 /* 17 parameters cmd */
1386 fdctrl->data_len = 18;
1390 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1391 /* 5 parameters cmd */
1392 fdctrl->data_len = 6;
1395 /* DRIVE_SPECIFICATION_COMMAND */
1396 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1397 /* 5 parameters cmd */
1398 fdctrl->data_len = 6;
1401 /* RELATIVE_SEEK_OUT */
1402 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1403 /* 2 parameters cmd */
1404 fdctrl->data_len = 3;
1408 FLOPPY_DPRINTF("LOCK command\n");
1409 /* No parameters cmd */
1411 fdctrl->fifo[0] = 0x10;
1412 fdctrl_set_fifo(fdctrl, 1, 1);
1415 /* FORMAT_AND_WRITE */
1416 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1417 /* 10 parameters cmd */
1418 fdctrl->data_len = 11;
1421 /* RELATIVE_SEEK_IN */
1422 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1423 /* 2 parameters cmd */
1424 fdctrl->data_len = 3;
1427 /* Unknown command */
1428 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1429 fdctrl_unimplemented(fdctrl);
1434 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1435 fdctrl->fifo[fdctrl->data_pos] = value;
1436 if (++fdctrl->data_pos == fdctrl->data_len) {
1437 /* We now have all parameters
1438 * and will be able to treat the command
1440 if (fdctrl->data_state & FD_STATE_FORMAT) {
1441 fdctrl_format_sector(fdctrl);
1444 switch (fdctrl->fifo[0] & 0x1F) {
1448 FLOPPY_DPRINTF("treat READ command\n");
1449 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1453 /* READ_DELETED variants */
1454 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1455 FLOPPY_ERROR("treat READ_DELETED command\n");
1456 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1459 /* VERIFY variants */
1460 // FLOPPY_DPRINTF("treat VERIFY command\n");
1461 FLOPPY_ERROR("treat VERIFY command\n");
1462 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1465 /* SCAN_EQUAL variants */
1466 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1467 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1468 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1471 /* SCAN_LOW_OR_EQUAL variants */
1472 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1473 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1474 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1477 /* SCAN_HIGH_OR_EQUAL variants */
1478 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1479 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1480 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1485 switch (fdctrl->fifo[0] & 0x3F) {
1487 /* WRITE variants */
1488 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1489 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1492 /* WRITE_DELETED variants */
1493 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1494 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1495 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1500 switch (fdctrl->fifo[0]) {
1503 FLOPPY_DPRINTF("treat SPECIFY command\n");
1504 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1505 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1506 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1507 /* No result back */
1508 fdctrl_reset_fifo(fdctrl);
1511 /* SENSE_DRIVE_STATUS */
1512 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1513 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1514 cur_drv = get_cur_drv(fdctrl);
1515 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1516 /* 1 Byte status back */
1517 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1518 (cur_drv->track == 0 ? 0x10 : 0x00) |
1519 (cur_drv->head << 2) |
1522 fdctrl_set_fifo(fdctrl, 1, 0);
1526 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1527 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1528 cur_drv = get_cur_drv(fdctrl);
1529 fd_recalibrate(cur_drv);
1530 fdctrl_reset_fifo(fdctrl);
1531 /* Raise Interrupt */
1532 fdctrl_raise_irq(fdctrl, 0x20);
1536 FLOPPY_DPRINTF("treat SEEK command\n");
1537 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1538 cur_drv = get_cur_drv(fdctrl);
1540 if (fdctrl->fifo[2] <= cur_drv->track)
1544 fdctrl_reset_fifo(fdctrl);
1545 if (fdctrl->fifo[2] > cur_drv->max_track) {
1546 fdctrl_raise_irq(fdctrl, 0x60);
1548 cur_drv->track = fdctrl->fifo[2];
1549 /* Raise Interrupt */
1550 fdctrl_raise_irq(fdctrl, 0x20);
1554 /* PERPENDICULAR_MODE */
1555 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1556 if (fdctrl->fifo[1] & 0x80)
1557 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1558 /* No result back */
1559 fdctrl_reset_fifo(fdctrl);
1563 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1564 fdctrl->config = fdctrl->fifo[2];
1565 fdctrl->precomp_trk = fdctrl->fifo[3];
1566 /* No result back */
1567 fdctrl_reset_fifo(fdctrl);
1570 /* POWERDOWN_MODE */
1571 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1572 fdctrl->pwrd = fdctrl->fifo[1];
1573 fdctrl->fifo[0] = fdctrl->fifo[1];
1574 fdctrl_set_fifo(fdctrl, 1, 1);
1578 FLOPPY_DPRINTF("treat OPTION command\n");
1579 /* No result back */
1580 fdctrl_reset_fifo(fdctrl);
1584 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1585 FLOPPY_ERROR("treat READ_TRACK command\n");
1586 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1590 FLOPPY_DPRINTF("treat READ_ID command\n");
1591 /* XXX: should set main status register to busy */
1592 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1593 qemu_mod_timer(fdctrl->result_timer,
1594 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1598 FLOPPY_DPRINTF("treat RESTORE command\n");
1599 /* Drives position */
1600 drv0(fdctrl)->track = fdctrl->fifo[3];
1601 drv1(fdctrl)->track = fdctrl->fifo[4];
1603 fdctrl->timer0 = fdctrl->fifo[7];
1604 fdctrl->timer1 = fdctrl->fifo[8];
1605 cur_drv->last_sect = fdctrl->fifo[9];
1606 fdctrl->lock = fdctrl->fifo[10] >> 7;
1607 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1608 fdctrl->config = fdctrl->fifo[11];
1609 fdctrl->precomp_trk = fdctrl->fifo[12];
1610 fdctrl->pwrd = fdctrl->fifo[13];
1611 fdctrl_reset_fifo(fdctrl);
1615 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1616 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1617 cur_drv = get_cur_drv(fdctrl);
1618 fdctrl->data_state |= FD_STATE_FORMAT;
1619 if (fdctrl->fifo[0] & 0x80)
1620 fdctrl->data_state |= FD_STATE_MULTI;
1622 fdctrl->data_state &= ~FD_STATE_MULTI;
1623 fdctrl->data_state &= ~FD_STATE_SEEK;
1625 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1627 cur_drv->last_sect =
1628 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1629 fdctrl->fifo[3] / 2;
1631 cur_drv->last_sect = fdctrl->fifo[3];
1633 /* Bochs BIOS is buggy and don't send format informations
1634 * for each sector. So, pretend all's done right now...
1636 fdctrl->data_state &= ~FD_STATE_FORMAT;
1637 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1640 /* DRIVE_SPECIFICATION_COMMAND */
1641 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1642 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1643 /* Command parameters done */
1644 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1645 fdctrl->fifo[0] = fdctrl->fifo[1];
1646 fdctrl->fifo[2] = 0;
1647 fdctrl->fifo[3] = 0;
1648 fdctrl_set_fifo(fdctrl, 4, 1);
1650 fdctrl_reset_fifo(fdctrl);
1652 } else if (fdctrl->data_len > 7) {
1654 fdctrl->fifo[0] = 0x80 |
1655 (cur_drv->head << 2) | fdctrl->cur_drv;
1656 fdctrl_set_fifo(fdctrl, 1, 1);
1660 /* RELATIVE_SEEK_OUT */
1661 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1662 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1663 cur_drv = get_cur_drv(fdctrl);
1666 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1667 cur_drv->track = cur_drv->max_track - 1;
1669 cur_drv->track += fdctrl->fifo[2];
1671 fdctrl_reset_fifo(fdctrl);
1672 fdctrl_raise_irq(fdctrl, 0x20);
1675 /* FORMAT_AND_WRITE */
1676 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1677 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1678 fdctrl_unimplemented(fdctrl);
1681 /* RELATIVE_SEEK_IN */
1682 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1683 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1684 cur_drv = get_cur_drv(fdctrl);
1687 if (fdctrl->fifo[2] > cur_drv->track) {
1690 cur_drv->track -= fdctrl->fifo[2];
1692 fdctrl_reset_fifo(fdctrl);
1693 /* Raise Interrupt */
1694 fdctrl_raise_irq(fdctrl, 0x20);
1700 static void fdctrl_result_timer(void *opaque)
1702 fdctrl_t *fdctrl = opaque;
1703 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);