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
32 /********************************************************/
33 /* debug Floppy devices */
34 //#define DEBUG_FLOPPY
37 #define FLOPPY_DPRINTF(fmt, args...) \
38 do { printf("FLOPPY: " fmt , ##args); } while (0)
40 #define FLOPPY_DPRINTF(fmt, args...)
43 #define FLOPPY_ERROR(fmt, args...) \
44 do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
46 /********************************************************/
47 /* Floppy drive emulation */
49 /* Will always be a fixed parameter for us */
50 #define FD_SECTOR_LEN 512
51 #define FD_SECTOR_SC 2 /* Sector size code */
53 /* Floppy disk drive emulation */
54 typedef enum fdisk_type_t {
55 FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
56 FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
57 FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
58 FDRIVE_DISK_NONE = 0x04, /* No disk */
61 typedef enum fdrive_type_t {
62 FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
63 FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
64 FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
65 FDRIVE_DRV_NONE = 0x03, /* No drive connected */
68 typedef struct fdrive_t {
72 uint8_t motor; /* on/off */
73 uint8_t perpendicular; /* 2.88 MB access mode */
74 uint8_t rv; /* Revalidated */
79 /* Last operation status */
80 uint8_t dir; /* Direction */
81 uint8_t rw; /* Read/write */
83 fdisk_type_t disk; /* Disk type */
84 uint8_t last_sect; /* Nb sector per track */
85 uint8_t max_track; /* Nb of tracks */
86 uint8_t ro; /* Is read-only */
89 static void fd_init (fdrive_t *drv)
93 // drv->drive = FDRIVE_DRV_288;
94 drv->drive = FDRIVE_DRV_144;
96 drv->perpendicular = 0;
99 drv->disk = FDRIVE_DISK_NONE;
104 static int _fd_sector (uint8_t head, uint8_t track,
105 uint8_t sect, uint8_t last_sect)
107 return (((track * 2) + head) * last_sect) + sect - 1;
110 /* Returns current position, in sectors, for given drive */
111 static int fd_sector (fdrive_t *drv)
113 return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
116 static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
121 if (track > drv->max_track) {
122 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
123 head, track, sect, 1, drv->max_track, drv->last_sect);
126 if (sect > drv->last_sect) {
127 FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
128 head, track, sect, 1, drv->max_track, drv->last_sect);
131 sector = _fd_sector(head, track, sect, drv->last_sect);
132 if (sector != fd_sector(drv)) {
135 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
136 head, track, sect, 1, drv->max_track, drv->last_sect);
149 /* Set drive back to track 0 */
150 static void fd_recalibrate (fdrive_t *drv)
152 FLOPPY_DPRINTF("recalibrate\n");
160 /* Revalidate a disk drive after a disk change */
161 static void fd_revalidate (fdrive_t *drv, int ro)
165 FLOPPY_DPRINTF("revalidate\n");
167 if (drv->bs != NULL) {
168 bdrv_get_geometry(drv->bs, &nb_sectors);
170 if (nb_sectors > 2880)
173 /* Pretend we have a 2.88 MB disk */
174 drv->disk = FDRIVE_DISK_288;
178 } else if (nb_sectors > 1440) {
179 /* Pretend we have a 1.44 MB disk */
180 drv->disk = FDRIVE_DISK_144;
184 /* Pretend we have a 720 kB disk */
185 drv->disk = FDRIVE_DISK_720;
191 drv->disk = FDRIVE_DISK_NONE;
192 drv->last_sect = 1; /* Avoid eventual divide by 0 bugs */
199 static void fd_start (fdrive_t *drv)
204 static void fd_stop (fdrive_t *drv)
209 /* Re-initialise a drives (motor off, repositioned) */
210 static void fd_reset (fdrive_t *drv)
216 /********************************************************/
217 /* Intel 82078 floppy disk controler emulation */
219 static void fdctrl_reset (int do_irq);
220 static void fdctrl_reset_fifo (void);
221 static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq);
222 static int fdctrl_misc_handler (int duknwo);
223 static void fdctrl_raise_irq (uint8_t status);
225 static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg);
226 static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg);
227 static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value);
228 static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg);
229 static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value);
230 static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg);
231 static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value);
232 static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg);
233 static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value);
234 static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg);
237 FD_CTRL_ACTIVE = 0x01,
238 FD_CTRL_RESET = 0x02,
239 FD_CTRL_SLEEP = 0x04,
254 FD_STATE_STATUS = 0x01,
255 FD_STATE_DATA = 0x02,
256 FD_STATE_STATE = 0x03,
257 FD_STATE_MULTI = 0x10,
258 FD_STATE_SEEK = 0x20,
261 #define FD_STATE(state) ((state) & FD_STATE_STATE)
262 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
263 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
265 typedef struct fdctrl_t {
266 /* Controler's identification */
271 /* Controler state */
277 uint8_t fifo[FD_SECTOR_LEN];
283 /* States kept only to be returned back */
287 /* precompensation */
291 /* Power down config (also with status regB access mode */
297 static fdctrl_t fdctrl;
299 void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base,
305 FLOPPY_DPRINTF("init controler\n");
306 memset(&fdctrl, 0, sizeof(fdctrl));
307 fdctrl.version = 0x90; /* Intel 82078 controler */
308 fdctrl.irq_lvl = irq_lvl;
309 fdctrl.dma_chann = dma_chann;
310 fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */
311 if (fdctrl.dma_chann != -1) {
313 DMA_register_channel(dma_chann, &fdctrl_transfer_handler,
314 &fdctrl_misc_handler);
318 for (i = 0; i < MAX_FD; i++)
319 fd_init(&fdctrl.drives[i]);
321 fdctrl.state = FD_CTRL_ACTIVE;
323 FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
325 io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
326 cpu_register_physical_memory(base, 0x08, io_mem);
329 register_ioport_read(base + 0x01, 1, fdctrl_read_statusB, 1);
330 register_ioport_read(base + 0x02, 1, fdctrl_read_dor, 1);
331 register_ioport_write(base + 0x02, 1, fdctrl_write_dor, 1);
332 register_ioport_read(base + 0x03, 1, fdctrl_read_tape, 1);
333 register_ioport_write(base + 0x03, 1, fdctrl_write_tape, 1);
334 register_ioport_read(base + 0x04, 1, fdctrl_read_main_status, 1);
335 register_ioport_write(base + 0x04, 1, fdctrl_write_rate, 1);
336 register_ioport_read(base + 0x05, 1, fdctrl_read_data, 1);
337 register_ioport_write(base + 0x05, 1, fdctrl_write_data, 1);
338 register_ioport_read(base + 0x07, 1, fdctrl_read_dir, 1);
340 if (boot_device == 'b')
344 #if defined (TARGET_I386)
345 cmos_register_fd(fdctrl.drives[0].drive, fdctrl.drives[1].drive);
349 int fdctrl_disk_change (int idx, const unsigned char *filename, int ro)
353 if (idx < 0 || idx > 1)
355 FLOPPY_DPRINTF("disk %d change: %s (%s)\n", idx, filename,
356 ro == 0 ? "rw" : "ro");
357 drv = &fdctrl.drives[idx];
358 if (fd_table[idx] != NULL) {
359 bdrv_close(fd_table[idx]);
360 fd_table[idx] = NULL;
362 fd_table[idx] = bdrv_open(filename, ro);
363 drv->bs = fd_table[idx];
364 if (fd_table[idx] == NULL)
366 fd_revalidate(drv, ro);
370 fdctrl_raise_irq(0x20);
376 /* Change IRQ state */
377 static void fdctrl_reset_irq (void)
379 if (fdctrl.state & FD_CTRL_INTR) {
380 pic_set_irq(fdctrl.irq_lvl, 0);
381 fdctrl.state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY);
385 static void fdctrl_raise_irq (uint8_t status)
387 if (~(fdctrl.state & FD_CTRL_INTR)) {
388 pic_set_irq(fdctrl.irq_lvl, 1);
389 fdctrl.state |= FD_CTRL_INTR;
391 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
392 fdctrl.int_status = status;
395 /* Reset controler */
396 static void fdctrl_reset (int do_irq)
400 FLOPPY_DPRINTF("reset controler\n");
402 /* Initialise controler */
407 fdctrl.data_state = FD_STATE_CMD;
408 fdctrl.data_dir = FD_DIR_WRITE;
409 for (i = 0; i < MAX_FD; i++)
410 fd_reset(&fdctrl.drives[i]);
413 fdctrl_raise_irq(0x20);
416 /* Status B register : 0x01 (read-only) */
417 static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg)
420 FLOPPY_DPRINTF("status register: 0x00\n");
425 /* Digital output register : 0x02 */
426 static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg)
428 fdrive_t *cur_drv, *drv0, *drv1;
431 drv0 = &fdctrl.drives[fdctrl.bootsel];
432 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
433 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
434 /* Drive motors state indicators */
435 retval |= drv1->motor << 5;
436 retval |= drv0->motor << 4;
438 retval |= fdctrl.dma_en << 3;
439 /* Reset indicator */
440 retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
442 retval |= fdctrl.cur_drv;
443 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
448 static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value)
450 fdrive_t *drv0, *drv1;
453 drv0 = &fdctrl.drives[fdctrl.bootsel];
454 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
456 if (fdctrl.state & FD_CTRL_RESET) {
457 if (!(value & 0x04)) {
458 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
462 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
463 /* Drive motors state indicators */
474 if (fdctrl.dma_chann != -1)
475 fdctrl.dma_en = 1 - ((value >> 3) & 1);
478 if (!(value & 0x04)) {
479 if (!(fdctrl.state & FD_CTRL_RESET)) {
480 FLOPPY_DPRINTF("controler enter RESET state\n");
481 fdctrl.state |= FD_CTRL_RESET;
485 if (fdctrl.state & FD_CTRL_RESET) {
486 FLOPPY_DPRINTF("controler out of RESET state\n");
487 fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
491 fdctrl.cur_drv = value & 1;
494 /* Tape drive register : 0x03 */
495 static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg)
500 /* Disk boot selection indicator */
501 retval |= fdctrl.bootsel << 2;
502 /* Tape indicators: never allowed */
503 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
508 static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value)
512 if (fdctrl.state & FD_CTRL_RESET) {
513 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
516 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
517 /* Disk boot selection indicator */
518 fdctrl.bootsel = (value >> 2) & 1;
519 /* Tape indicators: never allow */
522 /* Main status register : 0x04 (read) */
523 static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg)
528 fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
529 if (!(fdctrl.state & FD_CTRL_BUSY)) {
530 /* Data transfer allowed */
532 /* Data transfer direction indicator */
533 if (fdctrl.data_dir == FD_DIR_READ)
536 /* Should handle 0x20 for SPECIFY command */
537 /* Command busy indicator */
538 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA ||
539 FD_STATE(fdctrl.data_state) == FD_STATE_STATUS)
541 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
546 /* Data select rate register : 0x04 (write) */
547 static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value)
551 if (fdctrl.state & FD_CTRL_RESET) {
552 if (reg != 0x2 || !(value & 0x04)) {
553 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
557 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
558 /* Reset: autoclear */
560 fdctrl.state |= FD_CTRL_RESET;
562 fdctrl.state &= ~FD_CTRL_RESET;
565 fdctrl.state |= FD_CTRL_SLEEP;
568 // fdctrl.precomp = (value >> 2) & 0x07;
571 /* Digital input register : 0x07 (read-only) */
572 static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg)
574 fdrive_t *drv0, *drv1;
578 drv0 = &fdctrl.drives[fdctrl.bootsel];
579 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
580 if (drv0->rv || drv1->rv)
583 FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval);
590 /* FIFO state control */
591 static void fdctrl_reset_fifo (void)
593 fdctrl.data_dir = FD_DIR_WRITE;
595 fdctrl.data_state = FD_STATE_CMD;
598 /* Set FIFO status for the host to read */
599 static void fdctrl_set_fifo (int fifo_len, int do_irq)
601 fdctrl.data_dir = FD_DIR_READ;
602 fdctrl.data_len = fifo_len;
604 fdctrl.data_state = FD_STATE_STATUS;
606 fdctrl_raise_irq(0x00);
609 /* Set an error: unimplemented/unknown command */
610 static void fdctrl_unimplemented (void)
613 fdrive_t *cur_drv, *drv0, *drv1;
615 drv0 = &fdctrl.drives[fdctrl.bootsel];
616 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
617 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
618 fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv;
619 fdctrl.fifo[1] = 0x00;
620 fdctrl.fifo[2] = 0x00;
621 fdctrl_set_fifo(3, 1);
627 /* Callback for transfer end (stop or abort) */
628 static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1,
631 fdrive_t *cur_drv, *drv0, *drv1;
633 drv0 = &fdctrl.drives[fdctrl.bootsel];
634 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
635 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
636 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
637 status0, status1, status2,
638 status0 | (cur_drv->head << 1) | fdctrl.cur_drv);
639 fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv;
640 fdctrl.fifo[1] = status1;
641 fdctrl.fifo[2] = status2;
642 fdctrl.fifo[3] = cur_drv->track;
643 fdctrl.fifo[4] = cur_drv->head;
644 fdctrl.fifo[5] = cur_drv->sect;
645 fdctrl.fifo[6] = FD_SECTOR_SC;
646 fdctrl.data_dir = FD_DIR_READ;
647 if (fdctrl.state & FD_CTRL_BUSY)
648 DMA_release_DREQ(fdctrl.dma_chann);
649 fdctrl_set_fifo(7, 1);
652 /* Prepare a data transfer (either DMA or FIFO) */
653 static void fdctrl_start_transfer (int direction)
655 fdrive_t *cur_drv, *drv0, *drv1;
659 drv0 = &fdctrl.drives[fdctrl.bootsel];
660 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
661 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
662 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
666 FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
667 fdctrl.cur_drv, kh, kt, ks,
668 _fd_sector(kh, kt, ks, cur_drv->last_sect));
670 switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) {
673 fdctrl_stop_transfer(0x40, 0x00, 0x00);
680 fdctrl_stop_transfer(0x40, 0x80, 0x00);
686 /* No seek enabled */
687 fdctrl_stop_transfer(0x40, 0x00, 0x00);
698 /* Set the FIFO state */
699 fdctrl.data_dir = direction;
701 fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */
702 if (fdctrl.fifo[0] & 0x80)
703 fdctrl.data_state |= FD_STATE_MULTI;
705 fdctrl.data_state |= FD_STATE_SEEK;
708 /* DMA transfer are enabled. Check if DMA channel is well programmed */
709 dma_mode = DMA_get_channel_mode(fdctrl.dma_chann);
710 dma_mode = (dma_mode >> 2) & 3;
711 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction,
712 (128 << fdctrl.fifo[5]) *
713 (cur_drv->last_sect - ks + 1));
714 if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
715 direction == FD_DIR_SCANH) && dma_mode == 0) ||
716 (direction == FD_DIR_WRITE && dma_mode == 2) ||
717 (direction == FD_DIR_READ && dma_mode == 1)) {
718 /* No access is allowed until DMA transfer has completed */
719 fdctrl.state |= FD_CTRL_BUSY;
720 /* Now, we just have to wait for the DMA controler to
723 DMA_hold_DREQ(fdctrl.dma_chann);
727 FLOPPY_DPRINTF("start non-DMA transfer\n");
728 /* IO based transfer: calculate len */
729 if (fdctrl.fifo[5] == 00) {
730 fdctrl.data_len = fdctrl.fifo[8];
732 fdctrl.data_len = 128 << fdctrl.fifo[5];
733 fdctrl.data_len *= (cur_drv->last_sect - ks + 1);
734 if (fdctrl.fifo[0] & 0x80)
735 fdctrl.data_len *= 2;
737 fdctrl_raise_irq(0x00);
742 /* Prepare a transfer of deleted data */
743 static void fdctrl_start_transfer_del (int direction)
745 /* We don't handle deleted data,
746 * so we don't return *ANYTHING*
748 fdctrl_stop_transfer(0x60, 0x00, 0x00);
751 /* handlers for DMA transfers */
752 static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq)
754 fdrive_t *cur_drv, *drv0, *drv1;
757 uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
760 if (!(fdctrl.state & FD_CTRL_BUSY)) {
761 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
764 drv0 = &fdctrl.drives[fdctrl.bootsel];
765 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
766 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
767 // *irq = fdctrl.irq_lvl;
769 if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL ||
770 fdctrl.data_dir == FD_DIR_SCANH)
772 for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len;
773 fdctrl.data_pos += len) {
774 len = size - fdctrl.data_pos;
775 if (len > FD_SECTOR_LEN)
777 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
778 "(%d-0x%08x)\n", len, size, fdctrl.data_pos,
779 fdctrl.data_len, fdctrl.cur_drv, cur_drv->head,
780 cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
781 fd_sector(cur_drv) * 512);
782 if (len < FD_SECTOR_LEN) {
783 memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0,
784 FD_SECTOR_LEN - len - 1);
787 orig = (void *)(addr + fdctrl.data_pos);
789 if (fdctrl.data_dir != FD_DIR_WRITE) {
790 /* READ & SCAN commands */
791 if (cur_drv->bs == NULL) {
792 fdctrl_stop_transfer(0x40, 0x00, 0x00);
796 if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) {
797 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
799 /* Sure, image size is too small... */
800 memset((void *)(addr + fdctrl.data_pos), 0, FD_SECTOR_LEN);
802 if (fdctrl.data_dir == FD_DIR_READ) {
803 if (len < FD_SECTOR_LEN) {
804 memcpy((void *)(addr + fdctrl.data_pos),
805 fdctrl.fifo, FD_SECTOR_LEN);
809 ret = memcmp((void *)(addr + fdctrl.data_pos),
810 fdctrl.fifo, FD_SECTOR_LEN);
815 if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) ||
816 (ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) {
823 if (cur_drv->bs == NULL ||
824 bdrv_write(cur_drv->bs, fd_sector(cur_drv), orig, 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;
875 static int fdctrl_misc_handler (int duknwo)
880 /* Data register : 0x05 */
881 static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg)
883 fdrive_t *cur_drv, *drv0, *drv1;
888 drv0 = &fdctrl.drives[fdctrl.bootsel];
889 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
890 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
891 fdctrl.state &= ~FD_CTRL_SLEEP;
892 if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) {
893 FLOPPY_ERROR("can't read data in CMD state\n");
896 pos = fdctrl.data_pos;
897 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
898 pos %= FD_SECTOR_LEN;
900 len = fdctrl.data_len - fdctrl.data_pos;
901 if (len > FD_SECTOR_LEN)
903 bdrv_read(cur_drv->bs, fd_sector(cur_drv),
907 retval = fdctrl.fifo[pos];
908 if (++fdctrl.data_pos == fdctrl.data_len) {
910 /* Switch from transfert mode to status mode
911 * then from status mode to command mode
913 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
914 fdctrl_stop_transfer(0x20, 0x00, 0x00);
918 FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
923 static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value)
925 fdrive_t *cur_drv, *drv0, *drv1;
928 drv0 = &fdctrl.drives[fdctrl.bootsel];
929 drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
930 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
932 if (fdctrl.state & FD_CTRL_RESET) {
933 FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
936 fdctrl.state &= ~FD_CTRL_SLEEP;
937 if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) {
938 FLOPPY_ERROR("can't write data in status mode\n");
941 /* Is it write command time ? */
942 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
943 /* FIFO data write */
944 fdctrl.fifo[fdctrl.data_pos++] = value;
945 if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
946 fdctrl.data_pos == fdctrl.data_len) {
947 bdrv_write(cur_drv->bs, fd_sector(cur_drv),
948 fdctrl.fifo, FD_SECTOR_LEN);
950 /* Switch from transfert mode to status mode
951 * then from status mode to command mode
953 if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
954 fdctrl_stop_transfer(0x20, 0x00, 0x00);
957 if (fdctrl.data_pos == 0) {
959 switch (value & 0x5F) {
962 FLOPPY_DPRINTF("READ command\n");
963 /* 8 parameters cmd */
967 /* READ_DELETED variants */
968 FLOPPY_DPRINTF("READ_DELETED command\n");
969 /* 8 parameters cmd */
973 /* SCAN_EQUAL variants */
974 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
975 /* 8 parameters cmd */
979 /* VERIFY variants */
980 FLOPPY_DPRINTF("VERIFY command\n");
981 /* 8 parameters cmd */
985 /* SCAN_LOW_OR_EQUAL variants */
986 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
987 /* 8 parameters cmd */
991 /* SCAN_HIGH_OR_EQUAL variants */
992 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
993 /* 8 parameters cmd */
999 switch (value & 0x7F) {
1001 /* WRITE variants */
1002 FLOPPY_DPRINTF("WRITE command\n");
1003 /* 8 parameters cmd */
1004 fdctrl.data_len = 9;
1007 /* WRITE_DELETED variants */
1008 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1009 /* 8 parameters cmd */
1010 fdctrl.data_len = 9;
1018 FLOPPY_DPRINTF("SPECIFY command\n");
1019 /* 1 parameter cmd */
1020 fdctrl.data_len = 3;
1023 /* SENSE_DRIVE_STATUS */
1024 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1025 /* 1 parameter cmd */
1026 fdctrl.data_len = 2;
1030 FLOPPY_DPRINTF("RECALIBRATE command\n");
1031 /* 1 parameter cmd */
1032 fdctrl.data_len = 2;
1035 /* SENSE_INTERRUPT_STATUS */
1036 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1038 /* No parameters cmd: returns status if no interrupt */
1040 fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv;
1041 fdctrl.fifo[1] = cur_drv->track;
1042 fdctrl_set_fifo(2, 0);
1046 FLOPPY_DPRINTF("DUMPREG command\n");
1047 /* Drives position */
1048 fdctrl.fifo[0] = drv0->track;
1049 fdctrl.fifo[1] = drv1->track;
1053 fdctrl.fifo[4] = fdctrl.timer0;
1054 fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en;
1055 fdctrl.fifo[6] = cur_drv->last_sect;
1056 fdctrl.fifo[7] = (fdctrl.lock << 7) |
1057 (cur_drv->perpendicular << 2);
1058 fdctrl.fifo[8] = fdctrl.config;
1059 fdctrl.fifo[9] = fdctrl.precomp_trk;
1060 fdctrl_set_fifo(10, 0);
1064 FLOPPY_DPRINTF("SEEK command\n");
1065 /* 2 parameters cmd */
1066 fdctrl.data_len = 3;
1070 FLOPPY_DPRINTF("VERSION command\n");
1071 /* No parameters cmd */
1072 /* Controler's version */
1073 fdctrl.fifo[0] = fdctrl.version;
1074 fdctrl_set_fifo(1, 1);
1077 /* PERPENDICULAR_MODE */
1078 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1079 /* 1 parameter cmd */
1080 fdctrl.data_len = 2;
1084 FLOPPY_DPRINTF("CONFIGURE command\n");
1085 /* 3 parameters cmd */
1086 fdctrl.data_len = 4;
1090 FLOPPY_DPRINTF("UNLOCK command\n");
1091 /* No parameters cmd */
1094 fdctrl_set_fifo(1, 0);
1097 /* POWERDOWN_MODE */
1098 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1099 /* 2 parameters cmd */
1100 fdctrl.data_len = 3;
1104 FLOPPY_DPRINTF("PART_ID command\n");
1105 /* No parameters cmd */
1106 fdctrl.fifo[0] = 0x41; /* Stepping 1 */
1107 fdctrl_set_fifo(1, 0);
1111 FLOPPY_DPRINTF("SAVE command\n");
1112 /* No parameters cmd */
1115 /* Drives position */
1116 fdctrl.fifo[2] = drv0->track;
1117 fdctrl.fifo[3] = drv1->track;
1121 fdctrl.fifo[6] = fdctrl.timer0;
1122 fdctrl.fifo[7] = fdctrl.timer1;
1123 fdctrl.fifo[8] = cur_drv->last_sect;
1124 fdctrl.fifo[9] = (fdctrl.lock << 7) |
1125 (cur_drv->perpendicular << 2);
1126 fdctrl.fifo[10] = fdctrl.config;
1127 fdctrl.fifo[11] = fdctrl.precomp_trk;
1128 fdctrl.fifo[12] = fdctrl.pwrd;
1129 fdctrl.fifo[13] = 0;
1130 fdctrl.fifo[14] = 0;
1131 fdctrl_set_fifo(15, 1);
1135 FLOPPY_DPRINTF("OPTION command\n");
1136 /* 1 parameter cmd */
1137 fdctrl.data_len = 2;
1141 FLOPPY_DPRINTF("READ_TRACK command\n");
1142 /* 8 parameters cmd */
1143 fdctrl.data_len = 9;
1147 FLOPPY_DPRINTF("READ_ID command\n");
1148 /* 1 parameter cmd */
1149 fdctrl.data_len = 2;
1153 FLOPPY_DPRINTF("RESTORE command\n");
1154 /* 17 parameters cmd */
1155 fdctrl.data_len = 18;
1159 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1160 /* 5 parameters cmd */
1161 fdctrl.data_len = 9;
1164 /* DRIVE_SPECIFICATION_COMMAND */
1165 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1166 /* 5 parameters cmd */
1167 fdctrl.data_len = 6;
1170 /* RELATIVE_SEEK_OUT */
1171 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1172 /* 2 parameters cmd */
1173 fdctrl.data_len = 3;
1177 FLOPPY_DPRINTF("LOCK command\n");
1178 /* No parameters cmd */
1180 fdctrl.fifo[0] = 0x10;
1181 fdctrl_set_fifo(1, 1);
1184 /* FORMAT_AND_WRITE */
1185 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1186 /* 10 parameters cmd */
1187 fdctrl.data_len = 11;
1190 /* RELATIVE_SEEK_IN */
1191 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1192 /* 2 parameters cmd */
1193 fdctrl.data_len = 3;
1196 /* Unknown command */
1197 FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1198 fdctrl_unimplemented();
1203 fdctrl.fifo[fdctrl.data_pos] = value;
1204 if (++fdctrl.data_pos == fdctrl.data_len) {
1205 /* We now have all parameters
1206 * and will be able to treat the command
1208 switch (fdctrl.fifo[0] & 0x1F) {
1212 FLOPPY_DPRINTF("treat READ command\n");
1213 fdctrl_start_transfer(FD_DIR_READ);
1217 /* READ_DELETED variants */
1218 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1219 FLOPPY_ERROR("treat READ_DELETED command\n");
1220 fdctrl_start_transfer_del(1);
1223 /* VERIFY variants */
1224 // FLOPPY_DPRINTF("treat VERIFY command\n");
1225 FLOPPY_ERROR("treat VERIFY command\n");
1226 fdctrl_stop_transfer(0x20, 0x00, 0x00);
1229 /* SCAN_EQUAL variants */
1230 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1231 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1232 fdctrl_start_transfer(FD_DIR_SCANE);
1235 /* SCAN_LOW_OR_EQUAL variants */
1236 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1237 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1238 fdctrl_start_transfer(FD_DIR_SCANL);
1241 /* SCAN_HIGH_OR_EQUAL variants */
1242 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1243 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1244 fdctrl_start_transfer(FD_DIR_SCANH);
1249 switch (fdctrl.fifo[0] & 0x3F) {
1251 /* WRITE variants */
1252 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]);
1253 fdctrl_start_transfer(FD_DIR_WRITE);
1256 /* WRITE_DELETED variants */
1257 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1258 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1259 fdctrl_start_transfer_del(FD_DIR_WRITE);
1264 switch (fdctrl.fifo[0]) {
1267 FLOPPY_DPRINTF("treat SPECIFY command\n");
1268 fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF;
1269 fdctrl.timer1 = fdctrl.fifo[1] >> 1;
1270 /* No result back */
1271 fdctrl_reset_fifo();
1274 /* SENSE_DRIVE_STATUS */
1275 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1276 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1277 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1278 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1279 /* 1 Byte status back */
1280 fdctrl.fifo[0] = (cur_drv->ro << 6) |
1281 (cur_drv->track == 0 ? 0x10 : 0x00) |
1283 fdctrl_set_fifo(1, 0);
1287 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1288 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1289 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1290 fd_recalibrate(cur_drv);
1291 fdctrl_reset_fifo();
1292 /* Raise Interrupt */
1293 fdctrl_raise_irq(0x20);
1297 FLOPPY_DPRINTF("treat SEEK command\n");
1298 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1299 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1300 if (fdctrl.fifo[2] <= cur_drv->track)
1304 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1305 if (fdctrl.fifo[2] > cur_drv->max_track) {
1306 fdctrl_raise_irq(0x60);
1308 cur_drv->track = fdctrl.fifo[2];
1309 fdctrl_reset_fifo();
1310 /* Raise Interrupt */
1311 fdctrl_raise_irq(0x20);
1315 /* PERPENDICULAR_MODE */
1316 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1317 if (fdctrl.fifo[1] & 0x80)
1318 cur_drv->perpendicular = fdctrl.fifo[1] & 0x7;
1319 /* No result back */
1320 fdctrl_reset_fifo();
1324 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1325 fdctrl.config = fdctrl.fifo[2];
1326 fdctrl.precomp_trk = fdctrl.fifo[3];
1327 /* No result back */
1328 fdctrl_reset_fifo();
1331 /* POWERDOWN_MODE */
1332 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1333 fdctrl.pwrd = fdctrl.fifo[1];
1334 fdctrl.fifo[0] = fdctrl.fifo[1];
1335 fdctrl_set_fifo(1, 1);
1339 FLOPPY_DPRINTF("treat OPTION command\n");
1340 /* No result back */
1341 fdctrl_reset_fifo();
1345 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1346 FLOPPY_ERROR("treat READ_TRACK command\n");
1347 fdctrl_unimplemented();
1351 // FLOPPY_DPRINTF("treat READ_ID command\n");
1352 FLOPPY_ERROR("treat READ_ID command\n");
1353 fdctrl_stop_transfer(0x00, 0x00, 0x00);
1357 FLOPPY_DPRINTF("treat RESTORE command\n");
1358 /* Drives position */
1359 drv0->track = fdctrl.fifo[3];
1360 drv1->track = fdctrl.fifo[4];
1362 fdctrl.timer0 = fdctrl.fifo[7];
1363 fdctrl.timer1 = fdctrl.fifo[8];
1364 cur_drv->last_sect = fdctrl.fifo[9];
1365 fdctrl.lock = fdctrl.fifo[10] >> 7;
1366 cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF;
1367 fdctrl.config = fdctrl.fifo[11];
1368 fdctrl.precomp_trk = fdctrl.fifo[12];
1369 fdctrl.pwrd = fdctrl.fifo[13];
1370 fdctrl_reset_fifo();
1374 // FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1375 FLOPPY_ERROR("treat FORMAT_TRACK command\n");
1376 fdctrl_unimplemented();
1379 /* DRIVE_SPECIFICATION_COMMAND */
1380 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1381 if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) {
1382 /* Command parameters done */
1383 if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) {
1384 fdctrl.fifo[0] = fdctrl.fifo[1];
1387 fdctrl_set_fifo(4, 1);
1389 fdctrl_reset_fifo();
1391 } else if (fdctrl.data_len > 7) {
1393 fdctrl.fifo[0] = 0x80 |
1394 (cur_drv->head << 2) | fdctrl.cur_drv;
1395 fdctrl_set_fifo(1, 1);
1399 /* RELATIVE_SEEK_OUT */
1400 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1401 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1402 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1403 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1404 if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) {
1406 fdctrl_raise_irq(0x70);
1408 cur_drv->track += fdctrl.fifo[2];
1410 fdctrl_reset_fifo();
1411 fdctrl_raise_irq(0x20);
1415 /* FORMAT_AND_WRITE */
1416 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1417 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1418 fdctrl_unimplemented();
1421 /* RELATIVE_SEEK_IN */
1422 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1423 fdctrl.cur_drv = fdctrl.fifo[1] & 1;
1424 cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
1425 cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
1426 if (fdctrl.fifo[2] > cur_drv->track) {
1428 fdctrl_raise_irq(0x60);
1430 fdctrl_reset_fifo();
1431 cur_drv->track -= fdctrl.fifo[2];
1433 /* Raise Interrupt */
1434 fdctrl_raise_irq(0x20);