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
25 * The controller is used in Sun4m systems in a slightly different
26 * way. There are changes in DOR register and DMA is not available.
30 /********************************************************/
31 /* debug Floppy devices */
32 //#define DEBUG_FLOPPY
35 #define FLOPPY_DPRINTF(fmt, args...) \
36 do { printf("FLOPPY: " fmt , ##args); } while (0)
38 #define FLOPPY_DPRINTF(fmt, args...)
41 #define FLOPPY_ERROR(fmt, args...) \
42 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
44 /********************************************************/
45 /* Floppy drive emulation */
47 /* Will always be a fixed parameter for us */
48 #define FD_SECTOR_LEN 512
49 #define FD_SECTOR_SC 2 /* Sector size code */
51 /* Floppy disk drive emulation */
52 typedef enum fdisk_type_t {
53 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
54 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
55 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
56 FDRIVE_DISK_USER = 0x04, /* User defined geometry */
57 FDRIVE_DISK_NONE = 0x05, /* No disk */
60 typedef enum fdrive_type_t {
61 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
62 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
63 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
64 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
67 typedef enum fdrive_flags_t {
68 FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
69 FDRIVE_REVALIDATE = 0x02, /* Revalidated */
72 typedef enum fdisk_flags_t {
73 FDISK_DBL_SIDES = 0x01,
76 typedef struct fdrive_t {
80 fdrive_flags_t drflags;
81 uint8_t perpendicular; /* 2.88 MB access mode */
86 /* Last operation status */
87 uint8_t dir; /* Direction */
88 uint8_t rw; /* Read/write */
91 uint8_t last_sect; /* Nb sector per track */
92 uint8_t max_track; /* Nb of tracks */
93 uint16_t bps; /* Bytes per sector */
94 uint8_t ro; /* Is read-only */
98 /* XXX: suppress those hacks */
99 #define DMA_read_memory(a,b,c,d)
100 #define DMA_write_memory(a,b,c,d)
101 void DMA_register_channel (int nchan,
102 DMA_transfer_handler transfer_handler,
106 #define DMA_hold_DREQ(a)
107 #define DMA_release_DREQ(a)
108 #define DMA_get_channel_mode(a) (0)
109 #define DMA_schedule(a)
112 static void fd_init (fdrive_t *drv, BlockDriverState *bs)
116 drv->drive = FDRIVE_DRV_NONE;
118 drv->perpendicular = 0;
124 static int _fd_sector (uint8_t head, uint8_t track,
125 uint8_t sect, uint8_t last_sect)
127 return (((track * 2) + head) * last_sect) + sect - 1;
130 /* Returns current position, in sectors, for given drive */
131 static int fd_sector (fdrive_t *drv)
133 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
136 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
142 if (track > drv->max_track ||
143 (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
144 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
145 head, track, sect, 1,
146 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
147 drv->max_track, drv->last_sect);
150 if (sect > drv->last_sect) {
151 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
152 head, track, sect, 1,
153 (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
154 drv->max_track, drv->last_sect);
157 sector = _fd_sector(head, track, sect, drv->last_sect);
159 if (sector != fd_sector(drv)) {
162 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
163 head, track, sect, 1, drv->max_track, drv->last_sect);
168 if (drv->track != track)
177 /* Set drive back to track 0 */
178 static void fd_recalibrate (fdrive_t *drv)
180 FLOPPY_DPRINTF("recalibrate\n");
188 /* Recognize floppy formats */
189 typedef struct fd_format_t {
195 const unsigned char *str;
198 static fd_format_t fd_formats[] = {
199 /* First entry is default format */
200 /* 1.44 MB 3"1/2 floppy disks */
201 { FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", },
202 { FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", },
203 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", },
204 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", },
205 { FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", },
206 { FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", },
207 { FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", },
208 { FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", },
209 /* 2.88 MB 3"1/2 floppy disks */
210 { FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", },
211 { FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", },
212 { FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", },
213 { FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", },
214 { FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", },
215 /* 720 kB 3"1/2 floppy disks */
216 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", },
217 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", },
218 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", },
219 { FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", },
220 { FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", },
221 { FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", },
222 /* 1.2 MB 5"1/4 floppy disks */
223 { FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", },
224 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", },
225 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", },
226 { FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", },
227 { FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", },
228 /* 720 kB 5"1/4 floppy disks */
229 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", },
230 { FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", },
231 /* 360 kB 5"1/4 floppy disks */
232 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", },
233 { FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", },
234 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", },
235 { FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", },
236 /* 320 kB 5"1/4 floppy disks */
237 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", },
238 { FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", },
239 /* 360 kB must match 5"1/4 better than 3"1/2... */
240 { FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", },
242 { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
245 /* Revalidate a disk drive after a disk change */
246 static void fd_revalidate (fdrive_t *drv)
249 int64_t nb_sectors, size;
250 int i, first_match, match;
251 int nb_heads, max_track, last_sect, ro;
253 FLOPPY_DPRINTF("revalidate\n");
254 drv->drflags &= ~FDRIVE_REVALIDATE;
255 if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
256 ro = bdrv_is_read_only(drv->bs);
257 bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
258 if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
259 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
260 nb_heads - 1, max_track, last_sect);
262 bdrv_get_geometry(drv->bs, &nb_sectors);
266 parse = &fd_formats[i];
267 if (parse->drive == FDRIVE_DRV_NONE)
269 if (drv->drive == parse->drive ||
270 drv->drive == FDRIVE_DRV_NONE) {
271 size = (parse->max_head + 1) * parse->max_track *
273 if (nb_sectors == size) {
277 if (first_match == -1)
282 if (first_match == -1)
286 parse = &fd_formats[match];
288 nb_heads = parse->max_head + 1;
289 max_track = parse->max_track;
290 last_sect = parse->last_sect;
291 drv->drive = parse->drive;
292 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
293 nb_heads, max_track, last_sect, ro ? "ro" : "rw");
296 drv->flags &= ~FDISK_DBL_SIDES;
298 drv->flags |= FDISK_DBL_SIDES;
300 drv->max_track = max_track;
301 drv->last_sect = last_sect;
304 FLOPPY_DPRINTF("No disk in drive\n");
307 drv->flags &= ~FDISK_DBL_SIDES;
309 drv->drflags |= FDRIVE_REVALIDATE;
313 static void fd_start (fdrive_t *drv)
315 drv->drflags |= FDRIVE_MOTOR_ON;
318 static void fd_stop (fdrive_t *drv)
320 drv->drflags &= ~FDRIVE_MOTOR_ON;
323 /* Re-initialise a drives (motor off, repositioned) */
324 static void fd_reset (fdrive_t *drv)
330 /********************************************************/
331 /* Intel 82078 floppy disk controller emulation */
333 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq);
334 static void fdctrl_reset_fifo (fdctrl_t *fdctrl);
335 static int fdctrl_transfer_handler (void *opaque, int nchan,
336 int dma_pos, int dma_len);
337 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status);
338 static void fdctrl_result_timer(void *opaque);
340 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
341 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
342 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value);
343 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
344 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value);
345 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
346 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value);
347 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
348 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value);
349 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
352 FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */
353 FD_CTRL_RESET = 0x02,
354 FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */
355 FD_CTRL_BUSY = 0x08, /* dma transfer in progress */
369 FD_STATE_STATUS = 0x01,
370 FD_STATE_DATA = 0x02,
371 FD_STATE_STATE = 0x03,
372 FD_STATE_MULTI = 0x10,
373 FD_STATE_SEEK = 0x20,
374 FD_STATE_FORMAT = 0x40,
377 #define FD_STATE(state) ((state) & FD_STATE_STATE)
378 #define FD_SET_STATE(state, new_state) \
379 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
380 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
381 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
382 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
386 /* Controller's identification */
392 /* Controller state */
393 QEMUTimer *result_timer;
399 uint8_t fifo[FD_SECTOR_LEN];
405 uint8_t eot; /* last wanted sector */
406 /* States kept only to be returned back */
410 /* precompensation */
414 /* Power down config (also with status regB access mode */
420 static uint32_t fdctrl_read (void *opaque, uint32_t reg)
422 fdctrl_t *fdctrl = opaque;
425 switch (reg & 0x07) {
427 retval = fdctrl_read_statusB(fdctrl);
430 retval = fdctrl_read_dor(fdctrl);
433 retval = fdctrl_read_tape(fdctrl);
436 retval = fdctrl_read_main_status(fdctrl);
439 retval = fdctrl_read_data(fdctrl);
442 retval = fdctrl_read_dir(fdctrl);
445 retval = (uint32_t)(-1);
448 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
453 static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
455 fdctrl_t *fdctrl = opaque;
457 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
459 switch (reg & 0x07) {
461 fdctrl_write_dor(fdctrl, value);
464 fdctrl_write_tape(fdctrl, value);
467 fdctrl_write_rate(fdctrl, value);
470 fdctrl_write_data(fdctrl, value);
477 static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
479 return fdctrl_read(opaque, reg);
482 static void fdctrl_write_mem (void *opaque,
483 target_phys_addr_t reg, uint32_t value)
485 fdctrl_write(opaque, reg, value);
488 static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
494 static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
500 static void fd_change_cb (void *opaque)
502 fdrive_t *drv = opaque;
504 FLOPPY_DPRINTF("disk change\n");
508 fdctrl_reset_fifo(drv->fdctrl);
509 fdctrl_raise_irq(drv->fdctrl, 0x20);
513 fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
515 BlockDriverState **fds)
521 FLOPPY_DPRINTF("init controller\n");
522 fdctrl = qemu_mallocz(sizeof(fdctrl_t));
525 fdctrl->result_timer = qemu_new_timer(vm_clock,
526 fdctrl_result_timer, fdctrl);
528 fdctrl->version = 0x90; /* Intel 82078 controller */
529 fdctrl->irq_lvl = irq_lvl;
530 fdctrl->dma_chann = dma_chann;
531 fdctrl->io_base = io_base;
532 fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
533 if (fdctrl->dma_chann != -1) {
535 DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
539 for (i = 0; i < 2; i++) {
540 fd_init(&fdctrl->drives[i], fds[i]);
542 bdrv_set_change_cb(fds[i],
543 &fd_change_cb, &fdctrl->drives[i]);
546 fdctrl_reset(fdctrl, 0);
547 fdctrl->state = FD_CTRL_ACTIVE;
549 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write, fdctrl);
550 cpu_register_physical_memory(io_base, 0x08, io_mem);
552 register_ioport_read(io_base + 0x01, 5, 1, &fdctrl_read, fdctrl);
553 register_ioport_read(io_base + 0x07, 1, 1, &fdctrl_read, fdctrl);
554 register_ioport_write(io_base + 0x01, 5, 1, &fdctrl_write, fdctrl);
555 register_ioport_write(io_base + 0x07, 1, 1, &fdctrl_write, fdctrl);
557 for (i = 0; i < 2; i++) {
558 fd_revalidate(&fdctrl->drives[i]);
564 /* XXX: may change if moved to bdrv */
565 int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
567 return fdctrl->drives[drive_num].drive;
570 /* Change IRQ state */
571 static void fdctrl_reset_irq (fdctrl_t *fdctrl)
573 FLOPPY_DPRINTF("Reset interrupt\n");
574 pic_set_irq(fdctrl->irq_lvl, 0);
575 fdctrl->state &= ~FD_CTRL_INTR;
578 static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
580 if (~(fdctrl->state & FD_CTRL_INTR)) {
581 pic_set_irq(fdctrl->irq_lvl, 1);
582 fdctrl->state |= FD_CTRL_INTR;
584 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
585 fdctrl->int_status = status;
588 /* Reset controller */
589 static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
593 FLOPPY_DPRINTF("reset controller\n");
594 fdctrl_reset_irq(fdctrl);
595 /* Initialise controller */
598 fdctrl->data_pos = 0;
599 fdctrl->data_len = 0;
600 fdctrl->data_state = FD_STATE_CMD;
601 fdctrl->data_dir = FD_DIR_WRITE;
602 for (i = 0; i < MAX_FD; i++)
603 fd_reset(&fdctrl->drives[i]);
604 fdctrl_reset_fifo(fdctrl);
606 fdctrl_raise_irq(fdctrl, 0xc0);
609 static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
611 return &fdctrl->drives[fdctrl->bootsel];
614 static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
616 return &fdctrl->drives[1 - fdctrl->bootsel];
619 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
621 return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
624 /* Status B register : 0x01 (read-only) */
625 static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
627 FLOPPY_DPRINTF("status register: 0x00\n");
631 /* Digital output register : 0x02 */
632 static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
636 /* Drive motors state indicators */
637 if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
639 if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
642 retval |= fdctrl->dma_en << 3;
643 /* Reset indicator */
644 retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
646 retval |= fdctrl->cur_drv;
647 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
652 static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
655 if (fdctrl->state & FD_CTRL_RESET) {
656 if (!(value & 0x04)) {
657 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
661 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
662 /* Drive motors state indicators */
664 fd_start(drv1(fdctrl));
666 fd_stop(drv1(fdctrl));
668 fd_start(drv0(fdctrl));
670 fd_stop(drv0(fdctrl));
673 if (fdctrl->dma_chann != -1)
674 fdctrl->dma_en = 1 - ((value >> 3) & 1);
677 if (!(value & 0x04)) {
678 if (!(fdctrl->state & FD_CTRL_RESET)) {
679 FLOPPY_DPRINTF("controller enter RESET state\n");
680 fdctrl->state |= FD_CTRL_RESET;
683 if (fdctrl->state & FD_CTRL_RESET) {
684 FLOPPY_DPRINTF("controller out of RESET state\n");
685 fdctrl_reset(fdctrl, 1);
686 fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
690 fdctrl->cur_drv = value & 1;
693 /* Tape drive register : 0x03 */
694 static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
698 /* Disk boot selection indicator */
699 retval |= fdctrl->bootsel << 2;
700 /* Tape indicators: never allowed */
701 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
706 static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
709 if (fdctrl->state & FD_CTRL_RESET) {
710 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
713 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
714 /* Disk boot selection indicator */
715 fdctrl->bootsel = (value >> 2) & 1;
716 /* Tape indicators: never allow */
719 /* Main status register : 0x04 (read) */
720 static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
724 fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
725 if (!(fdctrl->state & FD_CTRL_BUSY)) {
726 /* Data transfer allowed */
728 /* Data transfer direction indicator */
729 if (fdctrl->data_dir == FD_DIR_READ)
732 /* Should handle 0x20 for SPECIFY command */
733 /* Command busy indicator */
734 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
735 FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
737 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
742 /* Data select rate register : 0x04 (write) */
743 static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
746 if (fdctrl->state & FD_CTRL_RESET) {
747 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
750 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
751 /* Reset: autoclear */
753 fdctrl->state |= FD_CTRL_RESET;
754 fdctrl_reset(fdctrl, 1);
755 fdctrl->state &= ~FD_CTRL_RESET;
758 fdctrl->state |= FD_CTRL_SLEEP;
759 fdctrl_reset(fdctrl, 1);
761 // fdctrl.precomp = (value >> 2) & 0x07;
764 /* Digital input register : 0x07 (read-only) */
765 static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
769 if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
770 drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
773 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
774 drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
775 drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
780 /* FIFO state control */
781 static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
783 fdctrl->data_dir = FD_DIR_WRITE;
784 fdctrl->data_pos = 0;
785 FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
788 /* Set FIFO status for the host to read */
789 static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
791 fdctrl->data_dir = FD_DIR_READ;
792 fdctrl->data_len = fifo_len;
793 fdctrl->data_pos = 0;
794 FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
796 fdctrl_raise_irq(fdctrl, 0x00);
799 /* Set an error: unimplemented/unknown command */
800 static void fdctrl_unimplemented (fdctrl_t *fdctrl)
805 cur_drv = get_cur_drv(fdctrl);
806 fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
807 fdctrl->fifo[1] = 0x00;
808 fdctrl->fifo[2] = 0x00;
809 fdctrl_set_fifo(fdctrl, 3, 1);
811 // fdctrl_reset_fifo(fdctrl);
812 fdctrl->fifo[0] = 0x80;
813 fdctrl_set_fifo(fdctrl, 1, 0);
817 /* Callback for transfer end (stop or abort) */
818 static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
819 uint8_t status1, uint8_t status2)
823 cur_drv = get_cur_drv(fdctrl);
824 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
825 status0, status1, status2,
826 status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
827 fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
828 fdctrl->fifo[1] = status1;
829 fdctrl->fifo[2] = status2;
830 fdctrl->fifo[3] = cur_drv->track;
831 fdctrl->fifo[4] = cur_drv->head;
832 fdctrl->fifo[5] = cur_drv->sect;
833 fdctrl->fifo[6] = FD_SECTOR_SC;
834 fdctrl->data_dir = FD_DIR_READ;
835 if (fdctrl->state & FD_CTRL_BUSY) {
836 DMA_release_DREQ(fdctrl->dma_chann);
837 fdctrl->state &= ~FD_CTRL_BUSY;
839 fdctrl_set_fifo(fdctrl, 7, 1);
842 /* Prepare a data transfer (either DMA or FIFO) */
843 static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
849 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
850 cur_drv = get_cur_drv(fdctrl);
851 kt = fdctrl->fifo[2];
852 kh = fdctrl->fifo[3];
853 ks = fdctrl->fifo[4];
854 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
855 fdctrl->cur_drv, kh, kt, ks,
856 _fd_sector(kh, kt, ks, cur_drv->last_sect));
858 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
861 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
862 fdctrl->fifo[3] = kt;
863 fdctrl->fifo[4] = kh;
864 fdctrl->fifo[5] = ks;
868 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
869 fdctrl->fifo[3] = kt;
870 fdctrl->fifo[4] = kh;
871 fdctrl->fifo[5] = ks;
874 /* No seek enabled */
875 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
876 fdctrl->fifo[3] = kt;
877 fdctrl->fifo[4] = kh;
878 fdctrl->fifo[5] = ks;
886 /* Set the FIFO state */
887 fdctrl->data_dir = direction;
888 fdctrl->data_pos = 0;
889 FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
890 if (fdctrl->fifo[0] & 0x80)
891 fdctrl->data_state |= FD_STATE_MULTI;
893 fdctrl->data_state &= ~FD_STATE_MULTI;
895 fdctrl->data_state |= FD_STATE_SEEK;
897 fdctrl->data_state &= ~FD_STATE_SEEK;
898 if (fdctrl->fifo[5] == 00) {
899 fdctrl->data_len = fdctrl->fifo[8];
902 fdctrl->data_len = 128 << fdctrl->fifo[5];
903 tmp = (cur_drv->last_sect - ks + 1);
904 if (fdctrl->fifo[0] & 0x80)
905 tmp += cur_drv->last_sect;
906 fdctrl->data_len *= tmp;
908 fdctrl->eot = fdctrl->fifo[6];
909 if (fdctrl->dma_en) {
911 /* DMA transfer are enabled. Check if DMA channel is well programmed */
912 dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
913 dma_mode = (dma_mode >> 2) & 3;
914 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
916 (128 << fdctrl->fifo[5]) *
917 (cur_drv->last_sect - ks + 1), fdctrl->data_len);
918 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
919 direction == FD_DIR_SCANH) && dma_mode == 0) ||
920 (direction == FD_DIR_WRITE && dma_mode == 2) ||
921 (direction == FD_DIR_READ && dma_mode == 1)) {
922 /* No access is allowed until DMA transfer has completed */
923 fdctrl->state |= FD_CTRL_BUSY;
924 /* Now, we just have to wait for the DMA controller to
927 DMA_hold_DREQ(fdctrl->dma_chann);
928 DMA_schedule(fdctrl->dma_chann);
931 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
934 FLOPPY_DPRINTF("start non-DMA transfer\n");
935 /* IO based transfer: calculate len */
936 fdctrl_raise_irq(fdctrl, 0x00);
941 /* Prepare a transfer of deleted data */
942 static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
944 /* We don't handle deleted data,
945 * so we don't return *ANYTHING*
947 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
950 /* handlers for DMA transfers */
951 static int fdctrl_transfer_handler (void *opaque, int nchan,
952 int dma_pos, int dma_len)
956 int len, start_pos, rel_pos;
957 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
960 if (!(fdctrl->state & FD_CTRL_BUSY)) {
961 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
964 cur_drv = get_cur_drv(fdctrl);
965 if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
966 fdctrl->data_dir == FD_DIR_SCANH)
968 if (dma_len > fdctrl->data_len)
969 dma_len = fdctrl->data_len;
970 if (cur_drv->bs == NULL) {
971 if (fdctrl->data_dir == FD_DIR_WRITE)
972 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
974 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
978 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
979 for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
980 len = dma_len - fdctrl->data_pos;
981 if (len + rel_pos > FD_SECTOR_LEN)
982 len = FD_SECTOR_LEN - rel_pos;
983 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
984 "(%d-0x%08x 0x%08x)\n", len, size, fdctrl->data_pos,
985 fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
986 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
987 fd_sector(cur_drv) * 512, addr);
988 if (fdctrl->data_dir != FD_DIR_WRITE ||
989 len < FD_SECTOR_LEN || rel_pos != 0) {
990 /* READ & SCAN commands and realign to a sector for WRITE */
991 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
992 fdctrl->fifo, 1) < 0) {
993 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
995 /* Sure, image size is too small... */
996 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
999 switch (fdctrl->data_dir) {
1002 DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1003 fdctrl->data_pos, len);
1004 /* cpu_physical_memory_write(addr + fdctrl->data_pos, */
1005 /* fdctrl->fifo + rel_pos, len); */
1008 /* WRITE commands */
1009 DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1010 fdctrl->data_pos, len);
1011 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1012 /* fdctrl->fifo + rel_pos, len); */
1013 if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1014 fdctrl->fifo, 1) < 0) {
1015 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1016 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1017 goto transfer_error;
1023 uint8_t tmpbuf[FD_SECTOR_LEN];
1025 DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1026 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1028 ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1033 if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1034 (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1041 fdctrl->data_pos += len;
1042 rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1044 /* Seek to next sector */
1045 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1046 cur_drv->head, cur_drv->track, cur_drv->sect,
1048 fdctrl->data_pos - size);
1049 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1051 if (cur_drv->sect >= cur_drv->last_sect ||
1052 cur_drv->sect == fdctrl->eot) {
1054 if (FD_MULTI_TRACK(fdctrl->data_state)) {
1055 if (cur_drv->head == 0 &&
1056 (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1061 if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1068 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1069 cur_drv->head, cur_drv->track,
1070 cur_drv->sect, fd_sector(cur_drv));
1077 len = fdctrl->data_pos - start_pos;
1078 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1079 fdctrl->data_pos, len, fdctrl->data_len);
1080 if (fdctrl->data_dir == FD_DIR_SCANE ||
1081 fdctrl->data_dir == FD_DIR_SCANL ||
1082 fdctrl->data_dir == FD_DIR_SCANH)
1084 if (FD_DID_SEEK(fdctrl->data_state))
1086 fdctrl->data_len -= len;
1087 // if (fdctrl->data_len == 0)
1088 fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1094 /* Data register : 0x05 */
1095 static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1098 uint32_t retval = 0;
1101 cur_drv = get_cur_drv(fdctrl);
1102 fdctrl->state &= ~FD_CTRL_SLEEP;
1103 if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1104 FLOPPY_ERROR("can't read data in CMD state\n");
1107 pos = fdctrl->data_pos;
1108 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1109 pos %= FD_SECTOR_LEN;
1111 len = fdctrl->data_len - fdctrl->data_pos;
1112 if (len > FD_SECTOR_LEN)
1113 len = FD_SECTOR_LEN;
1114 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1118 retval = fdctrl->fifo[pos];
1119 if (++fdctrl->data_pos == fdctrl->data_len) {
1120 fdctrl->data_pos = 0;
1121 /* Switch from transfer mode to status mode
1122 * then from status mode to command mode
1124 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1125 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1127 fdctrl_reset_fifo(fdctrl);
1128 fdctrl_reset_irq(fdctrl);
1131 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1136 static void fdctrl_format_sector (fdctrl_t *fdctrl)
1142 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1143 cur_drv = get_cur_drv(fdctrl);
1144 kt = fdctrl->fifo[6];
1145 kh = fdctrl->fifo[7];
1146 ks = fdctrl->fifo[8];
1147 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1148 fdctrl->cur_drv, kh, kt, ks,
1149 _fd_sector(kh, kt, ks, cur_drv->last_sect));
1151 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1154 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1155 fdctrl->fifo[3] = kt;
1156 fdctrl->fifo[4] = kh;
1157 fdctrl->fifo[5] = ks;
1161 fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1162 fdctrl->fifo[3] = kt;
1163 fdctrl->fifo[4] = kh;
1164 fdctrl->fifo[5] = ks;
1167 /* No seek enabled */
1168 fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1169 fdctrl->fifo[3] = kt;
1170 fdctrl->fifo[4] = kh;
1171 fdctrl->fifo[5] = ks;
1175 fdctrl->data_state |= FD_STATE_SEEK;
1180 memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1181 if (cur_drv->bs == NULL ||
1182 bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1183 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv));
1184 fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1186 if (cur_drv->sect == cur_drv->last_sect) {
1187 fdctrl->data_state &= ~FD_STATE_FORMAT;
1188 /* Last sector done */
1189 if (FD_DID_SEEK(fdctrl->data_state))
1190 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1192 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1195 fdctrl->data_pos = 0;
1196 fdctrl->data_len = 4;
1201 static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1205 cur_drv = get_cur_drv(fdctrl);
1207 if (fdctrl->state & FD_CTRL_RESET) {
1208 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1211 fdctrl->state &= ~FD_CTRL_SLEEP;
1212 if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1213 FLOPPY_ERROR("can't write data in status mode\n");
1216 /* Is it write command time ? */
1217 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1218 /* FIFO data write */
1219 fdctrl->fifo[fdctrl->data_pos++] = value;
1220 if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1221 fdctrl->data_pos == fdctrl->data_len) {
1222 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1223 fdctrl->fifo, FD_SECTOR_LEN);
1225 /* Switch from transfer mode to status mode
1226 * then from status mode to command mode
1228 if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1229 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1232 if (fdctrl->data_pos == 0) {
1234 switch (value & 0x5F) {
1237 FLOPPY_DPRINTF("READ command\n");
1238 /* 8 parameters cmd */
1239 fdctrl->data_len = 9;
1242 /* READ_DELETED variants */
1243 FLOPPY_DPRINTF("READ_DELETED command\n");
1244 /* 8 parameters cmd */
1245 fdctrl->data_len = 9;
1248 /* SCAN_EQUAL variants */
1249 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1250 /* 8 parameters cmd */
1251 fdctrl->data_len = 9;
1254 /* VERIFY variants */
1255 FLOPPY_DPRINTF("VERIFY command\n");
1256 /* 8 parameters cmd */
1257 fdctrl->data_len = 9;
1260 /* SCAN_LOW_OR_EQUAL variants */
1261 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1262 /* 8 parameters cmd */
1263 fdctrl->data_len = 9;
1266 /* SCAN_HIGH_OR_EQUAL variants */
1267 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1268 /* 8 parameters cmd */
1269 fdctrl->data_len = 9;
1274 switch (value & 0x7F) {
1276 /* WRITE variants */
1277 FLOPPY_DPRINTF("WRITE command\n");
1278 /* 8 parameters cmd */
1279 fdctrl->data_len = 9;
1282 /* WRITE_DELETED variants */
1283 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1284 /* 8 parameters cmd */
1285 fdctrl->data_len = 9;
1293 FLOPPY_DPRINTF("SPECIFY command\n");
1294 /* 1 parameter cmd */
1295 fdctrl->data_len = 3;
1298 /* SENSE_DRIVE_STATUS */
1299 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1300 /* 1 parameter cmd */
1301 fdctrl->data_len = 2;
1305 FLOPPY_DPRINTF("RECALIBRATE command\n");
1306 /* 1 parameter cmd */
1307 fdctrl->data_len = 2;
1310 /* SENSE_INTERRUPT_STATUS */
1311 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1312 fdctrl->int_status);
1313 /* No parameters cmd: returns status if no interrupt */
1316 fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1318 /* XXX: int_status handling is broken for read/write
1319 commands, so we do this hack. It should be suppressed
1322 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1324 fdctrl->fifo[1] = cur_drv->track;
1325 fdctrl_set_fifo(fdctrl, 2, 0);
1326 fdctrl_reset_irq(fdctrl);
1327 fdctrl->int_status = 0xC0;
1331 FLOPPY_DPRINTF("DUMPREG command\n");
1332 /* Drives position */
1333 fdctrl->fifo[0] = drv0(fdctrl)->track;
1334 fdctrl->fifo[1] = drv1(fdctrl)->track;
1335 fdctrl->fifo[2] = 0;
1336 fdctrl->fifo[3] = 0;
1338 fdctrl->fifo[4] = fdctrl->timer0;
1339 fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1340 fdctrl->fifo[6] = cur_drv->last_sect;
1341 fdctrl->fifo[7] = (fdctrl->lock << 7) |
1342 (cur_drv->perpendicular << 2);
1343 fdctrl->fifo[8] = fdctrl->config;
1344 fdctrl->fifo[9] = fdctrl->precomp_trk;
1345 fdctrl_set_fifo(fdctrl, 10, 0);
1349 FLOPPY_DPRINTF("SEEK command\n");
1350 /* 2 parameters cmd */
1351 fdctrl->data_len = 3;
1355 FLOPPY_DPRINTF("VERSION command\n");
1356 /* No parameters cmd */
1357 /* Controller's version */
1358 fdctrl->fifo[0] = fdctrl->version;
1359 fdctrl_set_fifo(fdctrl, 1, 1);
1362 /* PERPENDICULAR_MODE */
1363 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1364 /* 1 parameter cmd */
1365 fdctrl->data_len = 2;
1369 FLOPPY_DPRINTF("CONFIGURE command\n");
1370 /* 3 parameters cmd */
1371 fdctrl->data_len = 4;
1375 FLOPPY_DPRINTF("UNLOCK command\n");
1376 /* No parameters cmd */
1378 fdctrl->fifo[0] = 0;
1379 fdctrl_set_fifo(fdctrl, 1, 0);
1382 /* POWERDOWN_MODE */
1383 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1384 /* 2 parameters cmd */
1385 fdctrl->data_len = 3;
1389 FLOPPY_DPRINTF("PART_ID command\n");
1390 /* No parameters cmd */
1391 fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1392 fdctrl_set_fifo(fdctrl, 1, 0);
1396 FLOPPY_DPRINTF("SAVE command\n");
1397 /* No parameters cmd */
1398 fdctrl->fifo[0] = 0;
1399 fdctrl->fifo[1] = 0;
1400 /* Drives position */
1401 fdctrl->fifo[2] = drv0(fdctrl)->track;
1402 fdctrl->fifo[3] = drv1(fdctrl)->track;
1403 fdctrl->fifo[4] = 0;
1404 fdctrl->fifo[5] = 0;
1406 fdctrl->fifo[6] = fdctrl->timer0;
1407 fdctrl->fifo[7] = fdctrl->timer1;
1408 fdctrl->fifo[8] = cur_drv->last_sect;
1409 fdctrl->fifo[9] = (fdctrl->lock << 7) |
1410 (cur_drv->perpendicular << 2);
1411 fdctrl->fifo[10] = fdctrl->config;
1412 fdctrl->fifo[11] = fdctrl->precomp_trk;
1413 fdctrl->fifo[12] = fdctrl->pwrd;
1414 fdctrl->fifo[13] = 0;
1415 fdctrl->fifo[14] = 0;
1416 fdctrl_set_fifo(fdctrl, 15, 1);
1420 FLOPPY_DPRINTF("OPTION command\n");
1421 /* 1 parameter cmd */
1422 fdctrl->data_len = 2;
1426 FLOPPY_DPRINTF("READ_TRACK command\n");
1427 /* 8 parameters cmd */
1428 fdctrl->data_len = 9;
1432 FLOPPY_DPRINTF("READ_ID command\n");
1433 /* 1 parameter cmd */
1434 fdctrl->data_len = 2;
1438 FLOPPY_DPRINTF("RESTORE command\n");
1439 /* 17 parameters cmd */
1440 fdctrl->data_len = 18;
1444 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1445 /* 5 parameters cmd */
1446 fdctrl->data_len = 6;
1449 /* DRIVE_SPECIFICATION_COMMAND */
1450 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1451 /* 5 parameters cmd */
1452 fdctrl->data_len = 6;
1455 /* RELATIVE_SEEK_OUT */
1456 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1457 /* 2 parameters cmd */
1458 fdctrl->data_len = 3;
1462 FLOPPY_DPRINTF("LOCK command\n");
1463 /* No parameters cmd */
1465 fdctrl->fifo[0] = 0x10;
1466 fdctrl_set_fifo(fdctrl, 1, 1);
1469 /* FORMAT_AND_WRITE */
1470 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1471 /* 10 parameters cmd */
1472 fdctrl->data_len = 11;
1475 /* RELATIVE_SEEK_IN */
1476 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1477 /* 2 parameters cmd */
1478 fdctrl->data_len = 3;
1481 /* Unknown command */
1482 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1483 fdctrl_unimplemented(fdctrl);
1488 FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1489 fdctrl->fifo[fdctrl->data_pos] = value;
1490 if (++fdctrl->data_pos == fdctrl->data_len) {
1491 /* We now have all parameters
1492 * and will be able to treat the command
1494 if (fdctrl->data_state & FD_STATE_FORMAT) {
1495 fdctrl_format_sector(fdctrl);
1498 switch (fdctrl->fifo[0] & 0x1F) {
1502 FLOPPY_DPRINTF("treat READ command\n");
1503 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1507 /* READ_DELETED variants */
1508 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1509 FLOPPY_ERROR("treat READ_DELETED command\n");
1510 fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1513 /* VERIFY variants */
1514 // FLOPPY_DPRINTF("treat VERIFY command\n");
1515 FLOPPY_ERROR("treat VERIFY command\n");
1516 fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1519 /* SCAN_EQUAL variants */
1520 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1521 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1522 fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1525 /* SCAN_LOW_OR_EQUAL variants */
1526 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1527 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1528 fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1531 /* SCAN_HIGH_OR_EQUAL variants */
1532 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1533 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1534 fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1539 switch (fdctrl->fifo[0] & 0x3F) {
1541 /* WRITE variants */
1542 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1543 fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1546 /* WRITE_DELETED variants */
1547 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1548 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1549 fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1554 switch (fdctrl->fifo[0]) {
1557 FLOPPY_DPRINTF("treat SPECIFY command\n");
1558 fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1559 fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1560 fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1561 /* No result back */
1562 fdctrl_reset_fifo(fdctrl);
1565 /* SENSE_DRIVE_STATUS */
1566 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1567 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1568 cur_drv = get_cur_drv(fdctrl);
1569 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1570 /* 1 Byte status back */
1571 fdctrl->fifo[0] = (cur_drv->ro << 6) |
1572 (cur_drv->track == 0 ? 0x10 : 0x00) |
1573 (cur_drv->head << 2) |
1576 fdctrl_set_fifo(fdctrl, 1, 0);
1580 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1581 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1582 cur_drv = get_cur_drv(fdctrl);
1583 fd_recalibrate(cur_drv);
1584 fdctrl_reset_fifo(fdctrl);
1585 /* Raise Interrupt */
1586 fdctrl_raise_irq(fdctrl, 0x20);
1590 FLOPPY_DPRINTF("treat SEEK command\n");
1591 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1592 cur_drv = get_cur_drv(fdctrl);
1594 if (fdctrl->fifo[2] <= cur_drv->track)
1598 fdctrl_reset_fifo(fdctrl);
1599 if (fdctrl->fifo[2] > cur_drv->max_track) {
1600 fdctrl_raise_irq(fdctrl, 0x60);
1602 cur_drv->track = fdctrl->fifo[2];
1603 /* Raise Interrupt */
1604 fdctrl_raise_irq(fdctrl, 0x20);
1608 /* PERPENDICULAR_MODE */
1609 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1610 if (fdctrl->fifo[1] & 0x80)
1611 cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1612 /* No result back */
1613 fdctrl_reset_fifo(fdctrl);
1617 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1618 fdctrl->config = fdctrl->fifo[2];
1619 fdctrl->precomp_trk = fdctrl->fifo[3];
1620 /* No result back */
1621 fdctrl_reset_fifo(fdctrl);
1624 /* POWERDOWN_MODE */
1625 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1626 fdctrl->pwrd = fdctrl->fifo[1];
1627 fdctrl->fifo[0] = fdctrl->fifo[1];
1628 fdctrl_set_fifo(fdctrl, 1, 1);
1632 FLOPPY_DPRINTF("treat OPTION command\n");
1633 /* No result back */
1634 fdctrl_reset_fifo(fdctrl);
1638 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1639 FLOPPY_ERROR("treat READ_TRACK command\n");
1640 fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1644 FLOPPY_DPRINTF("treat READ_ID command\n");
1645 /* XXX: should set main status register to busy */
1646 cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1647 qemu_mod_timer(fdctrl->result_timer,
1648 qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1652 FLOPPY_DPRINTF("treat RESTORE command\n");
1653 /* Drives position */
1654 drv0(fdctrl)->track = fdctrl->fifo[3];
1655 drv1(fdctrl)->track = fdctrl->fifo[4];
1657 fdctrl->timer0 = fdctrl->fifo[7];
1658 fdctrl->timer1 = fdctrl->fifo[8];
1659 cur_drv->last_sect = fdctrl->fifo[9];
1660 fdctrl->lock = fdctrl->fifo[10] >> 7;
1661 cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1662 fdctrl->config = fdctrl->fifo[11];
1663 fdctrl->precomp_trk = fdctrl->fifo[12];
1664 fdctrl->pwrd = fdctrl->fifo[13];
1665 fdctrl_reset_fifo(fdctrl);
1669 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1670 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1671 cur_drv = get_cur_drv(fdctrl);
1672 fdctrl->data_state |= FD_STATE_FORMAT;
1673 if (fdctrl->fifo[0] & 0x80)
1674 fdctrl->data_state |= FD_STATE_MULTI;
1676 fdctrl->data_state &= ~FD_STATE_MULTI;
1677 fdctrl->data_state &= ~FD_STATE_SEEK;
1679 fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1681 cur_drv->last_sect =
1682 cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1683 fdctrl->fifo[3] / 2;
1685 cur_drv->last_sect = fdctrl->fifo[3];
1687 /* Bochs BIOS is buggy and don't send format informations
1688 * for each sector. So, pretend all's done right now...
1690 fdctrl->data_state &= ~FD_STATE_FORMAT;
1691 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1694 /* DRIVE_SPECIFICATION_COMMAND */
1695 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1696 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1697 /* Command parameters done */
1698 if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1699 fdctrl->fifo[0] = fdctrl->fifo[1];
1700 fdctrl->fifo[2] = 0;
1701 fdctrl->fifo[3] = 0;
1702 fdctrl_set_fifo(fdctrl, 4, 1);
1704 fdctrl_reset_fifo(fdctrl);
1706 } else if (fdctrl->data_len > 7) {
1708 fdctrl->fifo[0] = 0x80 |
1709 (cur_drv->head << 2) | fdctrl->cur_drv;
1710 fdctrl_set_fifo(fdctrl, 1, 1);
1714 /* RELATIVE_SEEK_OUT */
1715 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1716 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1717 cur_drv = get_cur_drv(fdctrl);
1720 if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1721 cur_drv->track = cur_drv->max_track - 1;
1723 cur_drv->track += fdctrl->fifo[2];
1725 fdctrl_reset_fifo(fdctrl);
1726 fdctrl_raise_irq(fdctrl, 0x20);
1729 /* FORMAT_AND_WRITE */
1730 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1731 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1732 fdctrl_unimplemented(fdctrl);
1735 /* RELATIVE_SEEK_IN */
1736 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1737 fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1738 cur_drv = get_cur_drv(fdctrl);
1741 if (fdctrl->fifo[2] > cur_drv->track) {
1744 cur_drv->track -= fdctrl->fifo[2];
1746 fdctrl_reset_fifo(fdctrl);
1747 /* Raise Interrupt */
1748 fdctrl_raise_irq(fdctrl, 0x20);
1754 static void fdctrl_result_timer(void *opaque)
1756 fdctrl_t *fdctrl = opaque;
1757 fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);