2 * QEMU Floppy disk emulator
4 * Copyright (c) 2003 Jocelyn Mayer
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
31 /********************************************************/
32 /* debug Floppy devices */
33 //#define DEBUG_FLOPPY
36 #define FLOPPY_DPRINTF(fmt, args...) \
37 do { printf("FLOPPY: " fmt , ##args); } while (0)
39 #define FLOPPY_DPRINTF(fmt, args...)
42 #define FLOPPY_ERROR(fmt, args...) \
43 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
45 /********************************************************/
46 /* Floppy drive emulation */
48 /* Will always be a fixed parameter for us */
49 #define FD_SECTOR_LEN 512
50 #define FD_SECTOR_SC 2 /* Sector size code */
52 /* Floppy disk drive emulation */
53 typedef enum fdisk_type_t {
54 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
55 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
56 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
57 FDRIVE_DISK_NONE = 0x04, /* No disk */
60 typedef enum fdrive_type_t {
61 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
62 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
63 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
64 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
67 typedef struct fdrive_t {
71 uint8_t motor; /* on/off */
72 uint8_t perpendicular; /* 2.88 MB access mode */
73 uint8_t rv; /* Revalidated */
78 /* Last operation status */
79 uint8_t dir; /* Direction */
80 uint8_t rw; /* Read/write */
82 fdisk_type_t disk; /* Disk type */
83 uint8_t last_sect; /* Nb sector per track */
84 uint8_t max_track; /* Nb of tracks */
85 uint8_t ro; /* Is read-only */
88 static void fd_init (fdrive_t *drv)
92 // drv->drive = FDRIVE_DRV_288;
93 drv->drive = FDRIVE_DRV_144;
95 drv->perpendicular = 0;
98 drv->disk = FDRIVE_DISK_NONE;
103 static int _fd_sector (uint8_t head, uint8_t track,
104 uint8_t sect, uint8_t last_sect)
106 return (((track * 2) + head) * last_sect) + sect - 1;
109 /* Returns current position, in sectors, for given drive */
110 static int fd_sector (fdrive_t *drv)
112 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
115 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
120 if (track > drv->max_track) {
121 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
122 head, track, sect, 1, drv->max_track, drv->last_sect);
125 if (sect > drv->last_sect) {
126 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
127 head, track, sect, 1, drv->max_track, drv->last_sect);
130 sector = _fd_sector(head, track, sect, drv->last_sect);
131 if (sector != fd_sector(drv)) {
134 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
135 head, track, sect, 1, drv->max_track, drv->last_sect);
148 /* Set drive back to track 0 */
149 static void fd_recalibrate (fdrive_t *drv)
151 FLOPPY_DPRINTF("recalibrate\n");
159 /* Revalidate a disk drive after a disk change */
160 static void fd_revalidate (fdrive_t *drv, int ro)
164 FLOPPY_DPRINTF("revalidate\n");
166 if (drv->bs != NULL) {
167 bdrv_get_geometry(drv->bs, &nb_sectors);
169 if (nb_sectors > 2880)
172 /* Pretend we have a 2.88 MB disk */
173 drv->disk = FDRIVE_DISK_288;
177 } else if (nb_sectors > 1440) {
178 /* Pretend we have a 1.44 MB disk */
179 drv->disk = FDRIVE_DISK_144;
183 /* Pretend we have a 720 kB disk */
184 drv->disk = FDRIVE_DISK_720;
190 drv->disk = FDRIVE_DISK_NONE;
191 drv->last_sect = 1; /* Avoid eventual divide by 0 bugs */
198 static void fd_start (fdrive_t *drv)
203 static void fd_stop (fdrive_t *drv)
208 /* Re-initialise a drives (motor off, repositioned) */
209 static void fd_reset (fdrive_t *drv)
215 /********************************************************/
216 /* Intel 82078 floppy disk controler emulation */
218 static void fdctrl_reset (int do_irq);
219 static void fdctrl_reset_fifo (void);
220 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
221 static void fdctrl_raise_irq (uint8_t status);
223 static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg);
224 static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg);
225 static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value);
226 static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg);
227 static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value);
228 static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg);
229 static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value);
230 static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg);
231 static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value);
232 static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg);
235 FD_CTRL_ACTIVE = 0x01,
236 FD_CTRL_RESET = 0x02,
237 FD_CTRL_SLEEP = 0x04,
252 FD_STATE_STATUS = 0x01,
253 FD_STATE_DATA = 0x02,
254 FD_STATE_STATE = 0x03,
255 FD_STATE_MULTI = 0x10,
256 FD_STATE_SEEK = 0x20,
259 #define FD_STATE(state) ((state) & FD_STATE_STATE)
260 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
261 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
263 typedef struct fdctrl_t {
264 /* Controler's identification */
269 /* Controler state */
275 uint8_t fifo[FD_SECTOR_LEN];
281 /* States kept only to be returned back */
285 /* precompensation */
289 /* Power down config (also with status regB access mode */
295 static fdctrl_t fdctrl;
297 void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base,
303 FLOPPY_DPRINTF("init controler\n");
304 memset(&fdctrl, 0, sizeof(fdctrl));
305 fdctrl.version = 0x90; /* Intel 82078 controler */
306 fdctrl.irq_lvl = irq_lvl;
307 fdctrl.dma_chann = dma_chann;
308 fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */
309 if (fdctrl.dma_chann != -1) {
311 DMA_register_channel(dma_chann, fdctrl_transfer_handler, &fdctrl);
315 for (i = 0; i < MAX_FD; i++)
316 fd_init(&fdctrl.drives[i]);
318 fdctrl.state = FD_CTRL_ACTIVE;
320 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
322 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
323 cpu_register_physical_memory(base, 0x08, io_mem);
326 register_ioport_read(base + 0x01, 1, fdctrl_read_statusB, 1);
327 register_ioport_read(base + 0x02, 1, fdctrl_read_dor, 1);
328 register_ioport_write(base + 0x02, 1, fdctrl_write_dor, 1);
329 register_ioport_read(base + 0x03, 1, fdctrl_read_tape, 1);
330 register_ioport_write(base + 0x03, 1, fdctrl_write_tape, 1);
331 register_ioport_read(base + 0x04, 1, fdctrl_read_main_status, 1);
332 register_ioport_write(base + 0x04, 1, fdctrl_write_rate, 1);
333 register_ioport_read(base + 0x05, 1, fdctrl_read_data, 1);
334 register_ioport_write(base + 0x05, 1, fdctrl_write_data, 1);
335 register_ioport_read(base + 0x07, 1, fdctrl_read_dir, 1);
337 if (boot_device == 'b')
341 #if defined (TARGET_I386)
342 cmos_register_fd(fdctrl.drives[0].drive, fdctrl.drives[1].drive);
346 int fdctrl_disk_change (int idx, const unsigned char *filename, int ro)
350 if (idx < 0 || idx > 1)
352 FLOPPY_DPRINTF("disk %d change: %s (%s)\n", idx, filename,
353 ro == 0 ? "rw" : "ro");
354 drv = &fdctrl.drives[idx];
355 if (fd_table[idx] != NULL) {
356 bdrv_close(fd_table[idx]);
357 fd_table[idx] = NULL;
359 fd_table[idx] = bdrv_open(filename, ro);
360 drv->bs = fd_table[idx];
361 if (fd_table[idx] == NULL)
363 fd_revalidate(drv, ro);
367 fdctrl_raise_irq(0x20);
373 /* Change IRQ state */
374 static void fdctrl_reset_irq (void)
376 if (fdctrl.state & FD_CTRL_INTR) {
377 pic_set_irq(fdctrl.irq_lvl, 0);
378 fdctrl.state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY);
382 static void fdctrl_raise_irq (uint8_t status)
384 if (~(fdctrl.state & FD_CTRL_INTR)) {
385 pic_set_irq(fdctrl.irq_lvl, 1);
386 fdctrl.state |= FD_CTRL_INTR;
388 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
389 fdctrl.int_status = status;
392 /* Reset controler */
393 static void fdctrl_reset (int do_irq)
397 FLOPPY_DPRINTF("reset controler\n");
399 /* Initialise controler */
404 fdctrl.data_state = FD_STATE_CMD;
405 fdctrl.data_dir = FD_DIR_WRITE;
406 for (i = 0; i < MAX_FD; i++)
407 fd_reset(&fdctrl.drives[i]);
410 fdctrl_raise_irq(0x20);
413 /* Status B register : 0x01 (read-only) */
414 static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg)
417 FLOPPY_DPRINTF("status register: 0x00\n");
422 /* Digital output register : 0x02 */
423 static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg)
425 fdrive_t *cur_drv, *drv0, *drv1;
428 drv0 = &fdctrl.drives[fdctrl.bootsel];
429 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
430 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
431 /* Drive motors state indicators */
432 retval |= drv1->motor << 5;
433 retval |= drv0->motor << 4;
435 retval |= fdctrl.dma_en << 3;
436 /* Reset indicator */
437 retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
439 retval |= fdctrl.cur_drv;
440 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
445 static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value)
447 fdrive_t *drv0, *drv1;
450 drv0 = &fdctrl.drives[fdctrl.bootsel];
451 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
453 if (fdctrl.state & FD_CTRL_RESET) {
454 if (!(value & 0x04)) {
455 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
459 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
460 /* Drive motors state indicators */
471 if (fdctrl.dma_chann != -1)
472 fdctrl.dma_en = 1 - ((value >> 3) & 1);
475 if (!(value & 0x04)) {
476 if (!(fdctrl.state & FD_CTRL_RESET)) {
477 FLOPPY_DPRINTF("controler enter RESET state\n");
478 fdctrl.state |= FD_CTRL_RESET;
482 if (fdctrl.state & FD_CTRL_RESET) {
483 FLOPPY_DPRINTF("controler out of RESET state\n");
484 fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
488 fdctrl.cur_drv = value & 1;
491 /* Tape drive register : 0x03 */
492 static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg)
497 /* Disk boot selection indicator */
498 retval |= fdctrl.bootsel << 2;
499 /* Tape indicators: never allowed */
500 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
505 static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value)
509 if (fdctrl.state & FD_CTRL_RESET) {
510 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
513 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
514 /* Disk boot selection indicator */
515 fdctrl.bootsel = (value >> 2) & 1;
516 /* Tape indicators: never allow */
519 /* Main status register : 0x04 (read) */
520 static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg)
525 fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
526 if (!(fdctrl.state & FD_CTRL_BUSY)) {
527 /* Data transfer allowed */
529 /* Data transfer direction indicator */
530 if (fdctrl.data_dir == FD_DIR_READ)
533 /* Should handle 0x20 for SPECIFY command */
534 /* Command busy indicator */
535 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA ||
536 FD_STATE(fdctrl.data_state) == FD_STATE_STATUS)
538 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
543 /* Data select rate register : 0x04 (write) */
544 static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value)
548 if (fdctrl.state & FD_CTRL_RESET) {
549 if (reg != 0x2 || !(value & 0x04)) {
550 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
554 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
555 /* Reset: autoclear */
557 fdctrl.state |= FD_CTRL_RESET;
559 fdctrl.state &= ~FD_CTRL_RESET;
562 fdctrl.state |= FD_CTRL_SLEEP;
565 // fdctrl.precomp = (value >> 2) & 0x07;
568 /* Digital input register : 0x07 (read-only) */
569 static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg)
571 fdrive_t *drv0, *drv1;
575 drv0 = &fdctrl.drives[fdctrl.bootsel];
576 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
577 if (drv0->rv || drv1->rv)
580 FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval);
587 /* FIFO state control */
588 static void fdctrl_reset_fifo (void)
590 fdctrl.data_dir = FD_DIR_WRITE;
592 fdctrl.data_state = FD_STATE_CMD;
595 /* Set FIFO status for the host to read */
596 static void fdctrl_set_fifo (int fifo_len, int do_irq)
598 fdctrl.data_dir = FD_DIR_READ;
599 fdctrl.data_len = fifo_len;
601 fdctrl.data_state = FD_STATE_STATUS;
603 fdctrl_raise_irq(0x00);
606 /* Set an error: unimplemented/unknown command */
607 static void fdctrl_unimplemented (void)
610 fdrive_t *cur_drv, *drv0, *drv1;
612 drv0 = &fdctrl.drives[fdctrl.bootsel];
613 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
614 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
615 fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv;
616 fdctrl.fifo[1] = 0x00;
617 fdctrl.fifo[2] = 0x00;
618 fdctrl_set_fifo(3, 1);
624 /* Callback for transfer end (stop or abort) */
625 static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1,
628 fdrive_t *cur_drv, *drv0, *drv1;
630 drv0 = &fdctrl.drives[fdctrl.bootsel];
631 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
632 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
633 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
634 status0, status1, status2,
635 status0 | (cur_drv->head << 1) | fdctrl.cur_drv);
636 fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv;
637 fdctrl.fifo[1] = status1;
638 fdctrl.fifo[2] = status2;
639 fdctrl.fifo[3] = cur_drv->track;
640 fdctrl.fifo[4] = cur_drv->head;
641 fdctrl.fifo[5] = cur_drv->sect;
642 fdctrl.fifo[6] = FD_SECTOR_SC;
643 fdctrl.data_dir = FD_DIR_READ;
644 if (fdctrl.state & FD_CTRL_BUSY)
645 DMA_release_DREQ(fdctrl.dma_chann);
646 fdctrl_set_fifo(7, 1);
649 /* Prepare a data transfer (either DMA or FIFO) */
650 static void fdctrl_start_transfer (int direction)
652 fdrive_t *cur_drv, *drv0, *drv1;
656 drv0 = &fdctrl.drives[fdctrl.bootsel];
657 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
658 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
659 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
663 FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
664 fdctrl.cur_drv, kh, kt, ks,
665 _fd_sector(kh, kt, ks, cur_drv->last_sect));
667 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) {
670 fdctrl_stop_transfer(0x40, 0x00, 0x00);
677 fdctrl_stop_transfer(0x40, 0x80, 0x00);
683 /* No seek enabled */
684 fdctrl_stop_transfer(0x40, 0x00, 0x00);
695 /* Set the FIFO state */
696 fdctrl.data_dir = direction;
698 fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */
699 if (fdctrl.fifo[0] & 0x80)
700 fdctrl.data_state |= FD_STATE_MULTI;
702 fdctrl.data_state |= FD_STATE_SEEK;
705 /* DMA transfer are enabled. Check if DMA channel is well programmed */
706 dma_mode = DMA_get_channel_mode(fdctrl.dma_chann);
707 dma_mode = (dma_mode >> 2) & 3;
708 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction,
709 (128 << fdctrl.fifo[5]) *
710 (cur_drv->last_sect - ks + 1));
711 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
712 direction == FD_DIR_SCANH) && dma_mode == 0) ||
713 (direction == FD_DIR_WRITE && dma_mode == 2) ||
714 (direction == FD_DIR_READ && dma_mode == 1)) {
715 /* No access is allowed until DMA transfer has completed */
716 fdctrl.state |= FD_CTRL_BUSY;
717 /* Now, we just have to wait for the DMA controler to
720 DMA_hold_DREQ(fdctrl.dma_chann);
721 DMA_schedule(fdctrl.dma_chann);
725 FLOPPY_DPRINTF("start non-DMA transfer\n");
726 /* IO based transfer: calculate len */
727 if (fdctrl.fifo[5] == 00) {
728 fdctrl.data_len = fdctrl.fifo[8];
730 fdctrl.data_len = 128 << fdctrl.fifo[5];
731 fdctrl.data_len *= (cur_drv->last_sect - ks + 1);
732 if (fdctrl.fifo[0] & 0x80)
733 fdctrl.data_len *= 2;
735 fdctrl_raise_irq(0x00);
740 /* Prepare a transfer of deleted data */
741 static void fdctrl_start_transfer_del (int direction)
743 /* We don't handle deleted data,
744 * so we don't return *ANYTHING*
746 fdctrl_stop_transfer(0x60, 0x00, 0x00);
749 /* handlers for DMA transfers */
750 /* XXX: the partial transfer logic seems to be broken */
751 static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
753 fdrive_t *cur_drv, *drv0, *drv1;
755 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
756 uint8_t tmpbuf[FD_SECTOR_LEN];
759 if (!(fdctrl.state & FD_CTRL_BUSY)) {
760 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
763 drv0 = &fdctrl.drives[fdctrl.bootsel];
764 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
765 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
766 if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL ||
767 fdctrl.data_dir == FD_DIR_SCANH)
769 for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len;
770 fdctrl.data_pos += len) {
771 len = size - fdctrl.data_pos;
772 if (len > FD_SECTOR_LEN)
774 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
775 "(%d-0x%08x)\n", len, size, fdctrl.data_pos,
776 fdctrl.data_len, fdctrl.cur_drv, cur_drv->head,
777 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
778 fd_sector(cur_drv) * 512);
779 if (fdctrl.data_dir != FD_DIR_WRITE) {
780 /* READ & SCAN commands */
781 if (cur_drv->bs == NULL) {
782 fdctrl_stop_transfer(0x40, 0x00, 0x00);
785 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) {
786 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
788 /* Sure, image size is too small... */
789 memset(tmpbuf, 0, FD_SECTOR_LEN);
791 if (fdctrl.data_dir == FD_DIR_READ) {
792 cpu_physical_memory_write(addr + fdctrl.data_pos,
794 if (len < FD_SECTOR_LEN) {
795 memcpy(&fdctrl.fifo[0], tmpbuf + len, FD_SECTOR_LEN - len);
796 memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, len);
800 /* XXX: what to do if not enough data ? */
801 cpu_physical_memory_read(addr + fdctrl.data_pos,
803 if (len < FD_SECTOR_LEN) {
804 memset(&fdctrl.fifo[len], 0, FD_SECTOR_LEN - len);
806 ret = memcmp(tmpbuf, fdctrl.fifo, FD_SECTOR_LEN);
811 if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) ||
812 (ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) {
819 cpu_physical_memory_read(addr + fdctrl.data_pos, tmpbuf, len);
820 if (len < FD_SECTOR_LEN) {
821 memset(tmpbuf + len, 0, FD_SECTOR_LEN - len);
823 if (cur_drv->bs == NULL ||
824 bdrv_write(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) {
825 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
826 fdctrl_stop_transfer(0x60, 0x00, 0x00);
830 if (len == FD_SECTOR_LEN) {
831 /* Seek to next sector */
832 if (cur_drv->sect == cur_drv->last_sect) {
833 if (cur_drv->head == 0) {
840 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
841 cur_drv->head, cur_drv->track, cur_drv->sect,
843 if (cur_drv->head == 0) {
844 FLOPPY_DPRINTF("end transfer\n");
847 if (!FD_MULTI_TRACK(fdctrl.data_state)) {
848 /* Single track read */
849 FLOPPY_DPRINTF("single track transfert: end transfer\n");
855 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
856 cur_drv->head, cur_drv->track, cur_drv->sect,
862 if (fdctrl.data_dir == FD_DIR_SCANE ||
863 fdctrl.data_dir == FD_DIR_SCANL ||
864 fdctrl.data_dir == FD_DIR_SCANH)
866 if (FD_DID_SEEK(fdctrl.data_state))
868 fdctrl_stop_transfer(status0, status1, status2);
871 return fdctrl.data_pos;
874 /* Data register : 0x05 */
875 static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg)
877 fdrive_t *cur_drv, *drv0, *drv1;
882 drv0 = &fdctrl.drives[fdctrl.bootsel];
883 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
884 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
885 fdctrl.state &= ~FD_CTRL_SLEEP;
886 if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) {
887 FLOPPY_ERROR("can't read data in CMD state\n");
890 pos = fdctrl.data_pos;
891 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
892 pos %= FD_SECTOR_LEN;
894 len = fdctrl.data_len - fdctrl.data_pos;
895 if (len > FD_SECTOR_LEN)
897 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
901 retval = fdctrl.fifo[pos];
902 if (++fdctrl.data_pos == fdctrl.data_len) {
904 /* Switch from transfert mode to status mode
905 * then from status mode to command mode
907 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
908 fdctrl_stop_transfer(0x20, 0x00, 0x00);
912 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
917 static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value)
919 fdrive_t *cur_drv, *drv0, *drv1;
922 drv0 = &fdctrl.drives[fdctrl.bootsel];
923 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
924 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
926 if (fdctrl.state & FD_CTRL_RESET) {
927 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
930 fdctrl.state &= ~FD_CTRL_SLEEP;
931 if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) {
932 FLOPPY_ERROR("can't write data in status mode\n");
935 /* Is it write command time ? */
936 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
937 /* FIFO data write */
938 fdctrl.fifo[fdctrl.data_pos++] = value;
939 if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
940 fdctrl.data_pos == fdctrl.data_len) {
941 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
942 fdctrl.fifo, FD_SECTOR_LEN);
944 /* Switch from transfert mode to status mode
945 * then from status mode to command mode
947 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
948 fdctrl_stop_transfer(0x20, 0x00, 0x00);
951 if (fdctrl.data_pos == 0) {
953 switch (value & 0x5F) {
956 FLOPPY_DPRINTF("READ command\n");
957 /* 8 parameters cmd */
961 /* READ_DELETED variants */
962 FLOPPY_DPRINTF("READ_DELETED command\n");
963 /* 8 parameters cmd */
967 /* SCAN_EQUAL variants */
968 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
969 /* 8 parameters cmd */
973 /* VERIFY variants */
974 FLOPPY_DPRINTF("VERIFY command\n");
975 /* 8 parameters cmd */
979 /* SCAN_LOW_OR_EQUAL variants */
980 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
981 /* 8 parameters cmd */
985 /* SCAN_HIGH_OR_EQUAL variants */
986 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
987 /* 8 parameters cmd */
993 switch (value & 0x7F) {
996 FLOPPY_DPRINTF("WRITE command\n");
997 /* 8 parameters cmd */
1001 /* WRITE_DELETED variants */
1002 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1003 /* 8 parameters cmd */
1004 fdctrl.data_len = 9;
1012 FLOPPY_DPRINTF("SPECIFY command\n");
1013 /* 1 parameter cmd */
1014 fdctrl.data_len = 3;
1017 /* SENSE_DRIVE_STATUS */
1018 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1019 /* 1 parameter cmd */
1020 fdctrl.data_len = 2;
1024 FLOPPY_DPRINTF("RECALIBRATE command\n");
1025 /* 1 parameter cmd */
1026 fdctrl.data_len = 2;
1029 /* SENSE_INTERRUPT_STATUS */
1030 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1032 /* No parameters cmd: returns status if no interrupt */
1034 fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv;
1035 fdctrl.fifo[1] = cur_drv->track;
1036 fdctrl_set_fifo(2, 0);
1040 FLOPPY_DPRINTF("DUMPREG command\n");
1041 /* Drives position */
1042 fdctrl.fifo[0] = drv0->track;
1043 fdctrl.fifo[1] = drv1->track;
1047 fdctrl.fifo[4] = fdctrl.timer0;
1048 fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en;
1049 fdctrl.fifo[6] = cur_drv->last_sect;
1050 fdctrl.fifo[7] = (fdctrl.lock << 7) |
1051 (cur_drv->perpendicular << 2);
1052 fdctrl.fifo[8] = fdctrl.config;
1053 fdctrl.fifo[9] = fdctrl.precomp_trk;
1054 fdctrl_set_fifo(10, 0);
1058 FLOPPY_DPRINTF("SEEK command\n");
1059 /* 2 parameters cmd */
1060 fdctrl.data_len = 3;
1064 FLOPPY_DPRINTF("VERSION command\n");
1065 /* No parameters cmd */
1066 /* Controler's version */
1067 fdctrl.fifo[0] = fdctrl.version;
1068 fdctrl_set_fifo(1, 1);
1071 /* PERPENDICULAR_MODE */
1072 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1073 /* 1 parameter cmd */
1074 fdctrl.data_len = 2;
1078 FLOPPY_DPRINTF("CONFIGURE command\n");
1079 /* 3 parameters cmd */
1080 fdctrl.data_len = 4;
1084 FLOPPY_DPRINTF("UNLOCK command\n");
1085 /* No parameters cmd */
1088 fdctrl_set_fifo(1, 0);
1091 /* POWERDOWN_MODE */
1092 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1093 /* 2 parameters cmd */
1094 fdctrl.data_len = 3;
1098 FLOPPY_DPRINTF("PART_ID command\n");
1099 /* No parameters cmd */
1100 fdctrl.fifo[0] = 0x41; /* Stepping 1 */
1101 fdctrl_set_fifo(1, 0);
1105 FLOPPY_DPRINTF("SAVE command\n");
1106 /* No parameters cmd */
1109 /* Drives position */
1110 fdctrl.fifo[2] = drv0->track;
1111 fdctrl.fifo[3] = drv1->track;
1115 fdctrl.fifo[6] = fdctrl.timer0;
1116 fdctrl.fifo[7] = fdctrl.timer1;
1117 fdctrl.fifo[8] = cur_drv->last_sect;
1118 fdctrl.fifo[9] = (fdctrl.lock << 7) |
1119 (cur_drv->perpendicular << 2);
1120 fdctrl.fifo[10] = fdctrl.config;
1121 fdctrl.fifo[11] = fdctrl.precomp_trk;
1122 fdctrl.fifo[12] = fdctrl.pwrd;
1123 fdctrl.fifo[13] = 0;
1124 fdctrl.fifo[14] = 0;
1125 fdctrl_set_fifo(15, 1);
1129 FLOPPY_DPRINTF("OPTION command\n");
1130 /* 1 parameter cmd */
1131 fdctrl.data_len = 2;
1135 FLOPPY_DPRINTF("READ_TRACK command\n");
1136 /* 8 parameters cmd */
1137 fdctrl.data_len = 9;
1141 FLOPPY_DPRINTF("READ_ID command\n");
1142 /* 1 parameter cmd */
1143 fdctrl.data_len = 2;
1147 FLOPPY_DPRINTF("RESTORE command\n");
1148 /* 17 parameters cmd */
1149 fdctrl.data_len = 18;
1153 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1154 /* 5 parameters cmd */
1155 fdctrl.data_len = 9;
1158 /* DRIVE_SPECIFICATION_COMMAND */
1159 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1160 /* 5 parameters cmd */
1161 fdctrl.data_len = 6;
1164 /* RELATIVE_SEEK_OUT */
1165 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1166 /* 2 parameters cmd */
1167 fdctrl.data_len = 3;
1171 FLOPPY_DPRINTF("LOCK command\n");
1172 /* No parameters cmd */
1174 fdctrl.fifo[0] = 0x10;
1175 fdctrl_set_fifo(1, 1);
1178 /* FORMAT_AND_WRITE */
1179 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1180 /* 10 parameters cmd */
1181 fdctrl.data_len = 11;
1184 /* RELATIVE_SEEK_IN */
1185 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1186 /* 2 parameters cmd */
1187 fdctrl.data_len = 3;
1190 /* Unknown command */
1191 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1192 fdctrl_unimplemented();
1197 fdctrl.fifo[fdctrl.data_pos] = value;
1198 if (++fdctrl.data_pos == fdctrl.data_len) {
1199 /* We now have all parameters
1200 * and will be able to treat the command
1202 switch (fdctrl.fifo[0] & 0x1F) {
1206 FLOPPY_DPRINTF("treat READ command\n");
1207 fdctrl_start_transfer(FD_DIR_READ);
1211 /* READ_DELETED variants */
1212 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1213 FLOPPY_ERROR("treat READ_DELETED command\n");
1214 fdctrl_start_transfer_del(1);
1217 /* VERIFY variants */
1218 // FLOPPY_DPRINTF("treat VERIFY command\n");
1219 FLOPPY_ERROR("treat VERIFY command\n");
1220 fdctrl_stop_transfer(0x20, 0x00, 0x00);
1223 /* SCAN_EQUAL variants */
1224 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1225 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1226 fdctrl_start_transfer(FD_DIR_SCANE);
1229 /* SCAN_LOW_OR_EQUAL variants */
1230 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1231 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1232 fdctrl_start_transfer(FD_DIR_SCANL);
1235 /* SCAN_HIGH_OR_EQUAL variants */
1236 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1237 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1238 fdctrl_start_transfer(FD_DIR_SCANH);
1243 switch (fdctrl.fifo[0] & 0x3F) {
1245 /* WRITE variants */
1246 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]);
1247 fdctrl_start_transfer(FD_DIR_WRITE);
1250 /* WRITE_DELETED variants */
1251 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1252 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1253 fdctrl_start_transfer_del(FD_DIR_WRITE);
1258 switch (fdctrl.fifo[0]) {
1261 FLOPPY_DPRINTF("treat SPECIFY command\n");
1262 fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF;
1263 fdctrl.timer1 = fdctrl.fifo[1] >> 1;
1264 /* No result back */
1265 fdctrl_reset_fifo();
1268 /* SENSE_DRIVE_STATUS */
1269 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1270 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1271 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1272 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1273 /* 1 Byte status back */
1274 fdctrl.fifo[0] = (cur_drv->ro << 6) |
1275 (cur_drv->track == 0 ? 0x10 : 0x00) |
1277 fdctrl_set_fifo(1, 0);
1281 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1282 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1283 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1284 fd_recalibrate(cur_drv);
1285 fdctrl_reset_fifo();
1286 /* Raise Interrupt */
1287 fdctrl_raise_irq(0x20);
1291 FLOPPY_DPRINTF("treat SEEK command\n");
1292 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1293 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1294 if (fdctrl.fifo[2] <= cur_drv->track)
1298 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1299 if (fdctrl.fifo[2] > cur_drv->max_track) {
1300 fdctrl_raise_irq(0x60);
1302 cur_drv->track = fdctrl.fifo[2];
1303 fdctrl_reset_fifo();
1304 /* Raise Interrupt */
1305 fdctrl_raise_irq(0x20);
1309 /* PERPENDICULAR_MODE */
1310 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1311 if (fdctrl.fifo[1] & 0x80)
1312 cur_drv->perpendicular = fdctrl.fifo[1] & 0x7;
1313 /* No result back */
1314 fdctrl_reset_fifo();
1318 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1319 fdctrl.config = fdctrl.fifo[2];
1320 fdctrl.precomp_trk = fdctrl.fifo[3];
1321 /* No result back */
1322 fdctrl_reset_fifo();
1325 /* POWERDOWN_MODE */
1326 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1327 fdctrl.pwrd = fdctrl.fifo[1];
1328 fdctrl.fifo[0] = fdctrl.fifo[1];
1329 fdctrl_set_fifo(1, 1);
1333 FLOPPY_DPRINTF("treat OPTION command\n");
1334 /* No result back */
1335 fdctrl_reset_fifo();
1339 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1340 FLOPPY_ERROR("treat READ_TRACK command\n");
1341 fdctrl_unimplemented();
1345 // FLOPPY_DPRINTF("treat READ_ID command\n");
1346 FLOPPY_ERROR("treat READ_ID command\n");
1347 fdctrl_stop_transfer(0x00, 0x00, 0x00);
1351 FLOPPY_DPRINTF("treat RESTORE command\n");
1352 /* Drives position */
1353 drv0->track = fdctrl.fifo[3];
1354 drv1->track = fdctrl.fifo[4];
1356 fdctrl.timer0 = fdctrl.fifo[7];
1357 fdctrl.timer1 = fdctrl.fifo[8];
1358 cur_drv->last_sect = fdctrl.fifo[9];
1359 fdctrl.lock = fdctrl.fifo[10] >> 7;
1360 cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF;
1361 fdctrl.config = fdctrl.fifo[11];
1362 fdctrl.precomp_trk = fdctrl.fifo[12];
1363 fdctrl.pwrd = fdctrl.fifo[13];
1364 fdctrl_reset_fifo();
1368 // FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1369 FLOPPY_ERROR("treat FORMAT_TRACK command\n");
1370 fdctrl_unimplemented();
1373 /* DRIVE_SPECIFICATION_COMMAND */
1374 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1375 if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) {
1376 /* Command parameters done */
1377 if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) {
1378 fdctrl.fifo[0] = fdctrl.fifo[1];
1381 fdctrl_set_fifo(4, 1);
1383 fdctrl_reset_fifo();
1385 } else if (fdctrl.data_len > 7) {
1387 fdctrl.fifo[0] = 0x80 |
1388 (cur_drv->head << 2) | fdctrl.cur_drv;
1389 fdctrl_set_fifo(1, 1);
1393 /* RELATIVE_SEEK_OUT */
1394 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1395 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1396 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1397 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1398 if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) {
1400 fdctrl_raise_irq(0x70);
1402 cur_drv->track += fdctrl.fifo[2];
1404 fdctrl_reset_fifo();
1405 fdctrl_raise_irq(0x20);
1409 /* FORMAT_AND_WRITE */
1410 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1411 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1412 fdctrl_unimplemented();
1415 /* RELATIVE_SEEK_IN */
1416 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1417 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1418 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1419 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1420 if (fdctrl.fifo[2] > cur_drv->track) {
1422 fdctrl_raise_irq(0x60);
1424 fdctrl_reset_fifo();
1425 cur_drv->track -= fdctrl.fifo[2];
1427 /* Raise Interrupt */
1428 fdctrl_raise_irq(0x20);