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 */
97 static void fd_init (fdrive_t
*drv
, BlockDriverState
*bs
)
101 drv
->drive
= FDRIVE_DRV_NONE
;
103 drv
->perpendicular
= 0;
109 static int _fd_sector (uint8_t head
, uint8_t track
,
110 uint8_t sect
, uint8_t last_sect
)
112 return (((track
* 2) + head
) * last_sect
) + sect
- 1;
115 /* Returns current position, in sectors, for given drive */
116 static int fd_sector (fdrive_t
*drv
)
118 return _fd_sector(drv
->head
, drv
->track
, drv
->sect
, drv
->last_sect
);
121 static int fd_seek (fdrive_t
*drv
, uint8_t head
, uint8_t track
, uint8_t sect
,
127 if (track
> drv
->max_track
||
128 (head
!= 0 && (drv
->flags
& FDISK_DBL_SIDES
) == 0)) {
129 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
130 head
, track
, sect
, 1,
131 (drv
->flags
& FDISK_DBL_SIDES
) == 0 ? 0 : 1,
132 drv
->max_track
, drv
->last_sect
);
135 if (sect
> drv
->last_sect
) {
136 FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
137 head
, track
, sect
, 1,
138 (drv
->flags
& FDISK_DBL_SIDES
) == 0 ? 0 : 1,
139 drv
->max_track
, drv
->last_sect
);
142 sector
= _fd_sector(head
, track
, sect
, drv
->last_sect
);
144 if (sector
!= fd_sector(drv
)) {
147 FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
148 head
, track
, sect
, 1, drv
->max_track
, drv
->last_sect
);
153 if (drv
->track
!= track
)
162 /* Set drive back to track 0 */
163 static void fd_recalibrate (fdrive_t
*drv
)
165 FLOPPY_DPRINTF("recalibrate\n");
173 /* Recognize floppy formats */
174 typedef struct fd_format_t
{
180 const unsigned char *str
;
183 static fd_format_t fd_formats
[] = {
184 /* First entry is default format */
185 /* 1.44 MB 3"1/2 floppy disks */
186 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 18, 80, 1, "1.44 MB 3\"1/2", },
187 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 20, 80, 1, "1.6 MB 3\"1/2", },
188 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 21, 80, 1, "1.68 MB 3\"1/2", },
189 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 21, 82, 1, "1.72 MB 3\"1/2", },
190 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 21, 83, 1, "1.74 MB 3\"1/2", },
191 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 22, 80, 1, "1.76 MB 3\"1/2", },
192 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 23, 80, 1, "1.84 MB 3\"1/2", },
193 { FDRIVE_DRV_144
, FDRIVE_DISK_144
, 24, 80, 1, "1.92 MB 3\"1/2", },
194 /* 2.88 MB 3"1/2 floppy disks */
195 { FDRIVE_DRV_288
, FDRIVE_DISK_288
, 36, 80, 1, "2.88 MB 3\"1/2", },
196 { FDRIVE_DRV_288
, FDRIVE_DISK_288
, 39, 80, 1, "3.12 MB 3\"1/2", },
197 { FDRIVE_DRV_288
, FDRIVE_DISK_288
, 40, 80, 1, "3.2 MB 3\"1/2", },
198 { FDRIVE_DRV_288
, FDRIVE_DISK_288
, 44, 80, 1, "3.52 MB 3\"1/2", },
199 { FDRIVE_DRV_288
, FDRIVE_DISK_288
, 48, 80, 1, "3.84 MB 3\"1/2", },
200 /* 720 kB 3"1/2 floppy disks */
201 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 9, 80, 1, "720 kB 3\"1/2", },
202 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 10, 80, 1, "800 kB 3\"1/2", },
203 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 10, 82, 1, "820 kB 3\"1/2", },
204 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 10, 83, 1, "830 kB 3\"1/2", },
205 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 13, 80, 1, "1.04 MB 3\"1/2", },
206 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 14, 80, 1, "1.12 MB 3\"1/2", },
207 /* 1.2 MB 5"1/4 floppy disks */
208 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 15, 80, 1, "1.2 kB 5\"1/4", },
209 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 18, 80, 1, "1.44 MB 5\"1/4", },
210 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 18, 82, 1, "1.48 MB 5\"1/4", },
211 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 18, 83, 1, "1.49 MB 5\"1/4", },
212 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 20, 80, 1, "1.6 MB 5\"1/4", },
213 /* 720 kB 5"1/4 floppy disks */
214 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 9, 80, 1, "720 kB 5\"1/4", },
215 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 11, 80, 1, "880 kB 5\"1/4", },
216 /* 360 kB 5"1/4 floppy disks */
217 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 9, 40, 1, "360 kB 5\"1/4", },
218 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 9, 40, 0, "180 kB 5\"1/4", },
219 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 10, 41, 1, "410 kB 5\"1/4", },
220 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 10, 42, 1, "420 kB 5\"1/4", },
221 /* 320 kB 5"1/4 floppy disks */
222 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 8, 40, 1, "320 kB 5\"1/4", },
223 { FDRIVE_DRV_120
, FDRIVE_DISK_288
, 8, 40, 0, "160 kB 5\"1/4", },
224 /* 360 kB must match 5"1/4 better than 3"1/2... */
225 { FDRIVE_DRV_144
, FDRIVE_DISK_720
, 9, 80, 0, "360 kB 3\"1/2", },
227 { FDRIVE_DRV_NONE
, FDRIVE_DISK_NONE
, -1, -1, 0, NULL
, },
230 /* Revalidate a disk drive after a disk change */
231 static void fd_revalidate (fdrive_t
*drv
)
234 int64_t nb_sectors
, size
;
235 int i
, first_match
, match
;
236 int nb_heads
, max_track
, last_sect
, ro
;
238 FLOPPY_DPRINTF("revalidate\n");
239 drv
->drflags
&= ~FDRIVE_REVALIDATE
;
240 if (drv
->bs
!= NULL
&& bdrv_is_inserted(drv
->bs
)) {
241 ro
= bdrv_is_read_only(drv
->bs
);
242 bdrv_get_geometry_hint(drv
->bs
, &nb_heads
, &max_track
, &last_sect
);
243 if (nb_heads
!= 0 && max_track
!= 0 && last_sect
!= 0) {
244 FLOPPY_DPRINTF("User defined disk (%d %d %d)",
245 nb_heads
- 1, max_track
, last_sect
);
247 bdrv_get_geometry(drv
->bs
, &nb_sectors
);
251 parse
= &fd_formats
[i
];
252 if (parse
->drive
== FDRIVE_DRV_NONE
)
254 if (drv
->drive
== parse
->drive
||
255 drv
->drive
== FDRIVE_DRV_NONE
) {
256 size
= (parse
->max_head
+ 1) * parse
->max_track
*
258 if (nb_sectors
== size
) {
262 if (first_match
== -1)
267 if (first_match
== -1)
271 parse
= &fd_formats
[match
];
273 nb_heads
= parse
->max_head
+ 1;
274 max_track
= parse
->max_track
;
275 last_sect
= parse
->last_sect
;
276 drv
->drive
= parse
->drive
;
277 FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse
->str
,
278 nb_heads
, max_track
, last_sect
, ro
? "ro" : "rw");
281 drv
->flags
&= ~FDISK_DBL_SIDES
;
283 drv
->flags
|= FDISK_DBL_SIDES
;
285 drv
->max_track
= max_track
;
286 drv
->last_sect
= last_sect
;
289 FLOPPY_DPRINTF("No disk in drive\n");
292 drv
->flags
&= ~FDISK_DBL_SIDES
;
294 drv
->drflags
|= FDRIVE_REVALIDATE
;
298 static void fd_start (fdrive_t
*drv
)
300 drv
->drflags
|= FDRIVE_MOTOR_ON
;
303 static void fd_stop (fdrive_t
*drv
)
305 drv
->drflags
&= ~FDRIVE_MOTOR_ON
;
308 /* Re-initialise a drives (motor off, repositioned) */
309 static void fd_reset (fdrive_t
*drv
)
315 /********************************************************/
316 /* Intel 82078 floppy disk controller emulation */
318 static void fdctrl_reset (fdctrl_t
*fdctrl
, int do_irq
);
319 static void fdctrl_reset_fifo (fdctrl_t
*fdctrl
);
320 static int fdctrl_transfer_handler (void *opaque
, int nchan
,
321 int dma_pos
, int dma_len
);
322 static void fdctrl_raise_irq (fdctrl_t
*fdctrl
, uint8_t status
);
323 static void fdctrl_result_timer(void *opaque
);
325 static uint32_t fdctrl_read_statusB (fdctrl_t
*fdctrl
);
326 static uint32_t fdctrl_read_dor (fdctrl_t
*fdctrl
);
327 static void fdctrl_write_dor (fdctrl_t
*fdctrl
, uint32_t value
);
328 static uint32_t fdctrl_read_tape (fdctrl_t
*fdctrl
);
329 static void fdctrl_write_tape (fdctrl_t
*fdctrl
, uint32_t value
);
330 static uint32_t fdctrl_read_main_status (fdctrl_t
*fdctrl
);
331 static void fdctrl_write_rate (fdctrl_t
*fdctrl
, uint32_t value
);
332 static uint32_t fdctrl_read_data (fdctrl_t
*fdctrl
);
333 static void fdctrl_write_data (fdctrl_t
*fdctrl
, uint32_t value
);
334 static uint32_t fdctrl_read_dir (fdctrl_t
*fdctrl
);
337 FD_CTRL_ACTIVE
= 0x01, /* XXX: suppress that */
338 FD_CTRL_RESET
= 0x02,
339 FD_CTRL_SLEEP
= 0x04, /* XXX: suppress that */
340 FD_CTRL_BUSY
= 0x08, /* dma transfer in progress */
354 FD_STATE_STATUS
= 0x01,
355 FD_STATE_DATA
= 0x02,
356 FD_STATE_STATE
= 0x03,
357 FD_STATE_MULTI
= 0x10,
358 FD_STATE_SEEK
= 0x20,
359 FD_STATE_FORMAT
= 0x40,
362 #define FD_STATE(state) ((state) & FD_STATE_STATE)
363 #define FD_SET_STATE(state, new_state) \
364 do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0)
365 #define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
366 #define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
367 #define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
371 /* Controller's identification */
377 /* Controller state */
378 QEMUTimer
*result_timer
;
384 uint8_t fifo
[FD_SECTOR_LEN
];
390 uint8_t eot
; /* last wanted sector */
391 /* States kept only to be returned back */
395 /* precompensation */
399 /* Power down config (also with status regB access mode */
405 static uint32_t fdctrl_read (void *opaque
, uint32_t reg
)
407 fdctrl_t
*fdctrl
= opaque
;
410 switch (reg
& 0x07) {
413 // Identify to Linux as S82078B
414 retval
= fdctrl_read_statusB(fdctrl
);
418 retval
= fdctrl_read_statusB(fdctrl
);
421 retval
= fdctrl_read_dor(fdctrl
);
424 retval
= fdctrl_read_tape(fdctrl
);
427 retval
= fdctrl_read_main_status(fdctrl
);
430 retval
= fdctrl_read_data(fdctrl
);
433 retval
= fdctrl_read_dir(fdctrl
);
436 retval
= (uint32_t)(-1);
439 FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg
& 7, retval
);
444 static void fdctrl_write (void *opaque
, uint32_t reg
, uint32_t value
)
446 fdctrl_t
*fdctrl
= opaque
;
448 FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg
& 7, value
);
450 switch (reg
& 0x07) {
452 fdctrl_write_dor(fdctrl
, value
);
455 fdctrl_write_tape(fdctrl
, value
);
458 fdctrl_write_rate(fdctrl
, value
);
461 fdctrl_write_data(fdctrl
, value
);
468 static uint32_t fdctrl_read_mem (void *opaque
, target_phys_addr_t reg
)
470 return fdctrl_read(opaque
, reg
);
473 static void fdctrl_write_mem (void *opaque
,
474 target_phys_addr_t reg
, uint32_t value
)
476 fdctrl_write(opaque
, reg
, value
);
479 static CPUReadMemoryFunc
*fdctrl_mem_read
[3] = {
485 static CPUWriteMemoryFunc
*fdctrl_mem_write
[3] = {
491 static void fd_change_cb (void *opaque
)
493 fdrive_t
*drv
= opaque
;
495 FLOPPY_DPRINTF("disk change\n");
499 fdctrl_reset_fifo(drv
->fdctrl
);
500 fdctrl_raise_irq(drv
->fdctrl
, 0x20);
504 fdctrl_t
*fdctrl_init (int irq_lvl
, int dma_chann
, int mem_mapped
,
506 BlockDriverState
**fds
)
512 FLOPPY_DPRINTF("init controller\n");
513 fdctrl
= qemu_mallocz(sizeof(fdctrl_t
));
516 fdctrl
->result_timer
= qemu_new_timer(vm_clock
,
517 fdctrl_result_timer
, fdctrl
);
519 fdctrl
->version
= 0x90; /* Intel 82078 controller */
520 fdctrl
->irq_lvl
= irq_lvl
;
521 fdctrl
->dma_chann
= dma_chann
;
522 fdctrl
->io_base
= io_base
;
523 fdctrl
->config
= 0x60; /* Implicit seek, polling & FIFO enabled */
524 if (fdctrl
->dma_chann
!= -1) {
526 DMA_register_channel(dma_chann
, &fdctrl_transfer_handler
, fdctrl
);
530 for (i
= 0; i
< 2; i
++) {
531 fd_init(&fdctrl
->drives
[i
], fds
[i
]);
533 bdrv_set_change_cb(fds
[i
],
534 &fd_change_cb
, &fdctrl
->drives
[i
]);
537 fdctrl_reset(fdctrl
, 0);
538 fdctrl
->state
= FD_CTRL_ACTIVE
;
540 io_mem
= cpu_register_io_memory(0, fdctrl_mem_read
, fdctrl_mem_write
, fdctrl
);
541 cpu_register_physical_memory(io_base
, 0x08, io_mem
);
543 register_ioport_read(io_base
+ 0x01, 5, 1, &fdctrl_read
, fdctrl
);
544 register_ioport_read(io_base
+ 0x07, 1, 1, &fdctrl_read
, fdctrl
);
545 register_ioport_write(io_base
+ 0x01, 5, 1, &fdctrl_write
, fdctrl
);
546 register_ioport_write(io_base
+ 0x07, 1, 1, &fdctrl_write
, fdctrl
);
548 for (i
= 0; i
< 2; i
++) {
549 fd_revalidate(&fdctrl
->drives
[i
]);
555 /* XXX: may change if moved to bdrv */
556 int fdctrl_get_drive_type(fdctrl_t
*fdctrl
, int drive_num
)
558 return fdctrl
->drives
[drive_num
].drive
;
561 /* Change IRQ state */
562 static void fdctrl_reset_irq (fdctrl_t
*fdctrl
)
564 FLOPPY_DPRINTF("Reset interrupt\n");
565 pic_set_irq(fdctrl
->irq_lvl
, 0);
566 fdctrl
->state
&= ~FD_CTRL_INTR
;
569 static void fdctrl_raise_irq (fdctrl_t
*fdctrl
, uint8_t status
)
573 if (!fdctrl
->dma_en
) {
574 fdctrl
->state
&= ~FD_CTRL_BUSY
;
575 fdctrl
->int_status
= status
;
579 if (~(fdctrl
->state
& FD_CTRL_INTR
)) {
580 pic_set_irq(fdctrl
->irq_lvl
, 1);
581 fdctrl
->state
|= FD_CTRL_INTR
;
583 FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status
);
584 fdctrl
->int_status
= status
;
587 /* Reset controller */
588 static void fdctrl_reset (fdctrl_t
*fdctrl
, int do_irq
)
592 FLOPPY_DPRINTF("reset controller\n");
593 fdctrl_reset_irq(fdctrl
);
594 /* Initialise controller */
597 fdctrl
->data_pos
= 0;
598 fdctrl
->data_len
= 0;
599 fdctrl
->data_state
= FD_STATE_CMD
;
600 fdctrl
->data_dir
= FD_DIR_WRITE
;
601 for (i
= 0; i
< MAX_FD
; i
++)
602 fd_reset(&fdctrl
->drives
[i
]);
603 fdctrl_reset_fifo(fdctrl
);
605 fdctrl_raise_irq(fdctrl
, 0xc0);
608 static inline fdrive_t
*drv0 (fdctrl_t
*fdctrl
)
610 return &fdctrl
->drives
[fdctrl
->bootsel
];
613 static inline fdrive_t
*drv1 (fdctrl_t
*fdctrl
)
615 return &fdctrl
->drives
[1 - fdctrl
->bootsel
];
618 static fdrive_t
*get_cur_drv (fdctrl_t
*fdctrl
)
620 return fdctrl
->cur_drv
== 0 ? drv0(fdctrl
) : drv1(fdctrl
);
623 /* Status B register : 0x01 (read-only) */
624 static uint32_t fdctrl_read_statusB (fdctrl_t
*fdctrl
)
626 FLOPPY_DPRINTF("status register: 0x00\n");
630 /* Digital output register : 0x02 */
631 static uint32_t fdctrl_read_dor (fdctrl_t
*fdctrl
)
635 /* Drive motors state indicators */
636 if (drv0(fdctrl
)->drflags
& FDRIVE_MOTOR_ON
)
638 if (drv1(fdctrl
)->drflags
& FDRIVE_MOTOR_ON
)
641 retval
|= fdctrl
->dma_en
<< 3;
642 /* Reset indicator */
643 retval
|= (fdctrl
->state
& FD_CTRL_RESET
) == 0 ? 0x04 : 0;
645 retval
|= fdctrl
->cur_drv
;
646 FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval
);
651 static void fdctrl_write_dor (fdctrl_t
*fdctrl
, uint32_t value
)
654 if (fdctrl
->state
& FD_CTRL_RESET
) {
655 if (!(value
& 0x04)) {
656 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
660 FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value
);
661 /* Drive motors state indicators */
663 fd_start(drv1(fdctrl
));
665 fd_stop(drv1(fdctrl
));
667 fd_start(drv0(fdctrl
));
669 fd_stop(drv0(fdctrl
));
672 if (fdctrl
->dma_chann
!= -1)
673 fdctrl
->dma_en
= 1 - ((value
>> 3) & 1);
676 if (!(value
& 0x04)) {
677 if (!(fdctrl
->state
& FD_CTRL_RESET
)) {
678 FLOPPY_DPRINTF("controller enter RESET state\n");
679 fdctrl
->state
|= FD_CTRL_RESET
;
682 if (fdctrl
->state
& FD_CTRL_RESET
) {
683 FLOPPY_DPRINTF("controller out of RESET state\n");
684 fdctrl_reset(fdctrl
, 1);
685 fdctrl
->state
&= ~(FD_CTRL_RESET
| FD_CTRL_SLEEP
);
689 fdctrl
->cur_drv
= value
& 1;
692 /* Tape drive register : 0x03 */
693 static uint32_t fdctrl_read_tape (fdctrl_t
*fdctrl
)
697 /* Disk boot selection indicator */
698 retval
|= fdctrl
->bootsel
<< 2;
699 /* Tape indicators: never allowed */
700 FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval
);
705 static void fdctrl_write_tape (fdctrl_t
*fdctrl
, uint32_t value
)
708 if (fdctrl
->state
& FD_CTRL_RESET
) {
709 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
712 FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value
);
713 /* Disk boot selection indicator */
714 fdctrl
->bootsel
= (value
>> 2) & 1;
715 /* Tape indicators: never allow */
718 /* Main status register : 0x04 (read) */
719 static uint32_t fdctrl_read_main_status (fdctrl_t
*fdctrl
)
723 fdctrl
->state
&= ~(FD_CTRL_SLEEP
| FD_CTRL_RESET
);
724 if (!(fdctrl
->state
& FD_CTRL_BUSY
)) {
725 /* Data transfer allowed */
727 /* Data transfer direction indicator */
728 if (fdctrl
->data_dir
== FD_DIR_READ
)
731 /* Should handle 0x20 for SPECIFY command */
732 /* Command busy indicator */
733 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_DATA
||
734 FD_STATE(fdctrl
->data_state
) == FD_STATE_STATUS
)
736 FLOPPY_DPRINTF("main status register: 0x%02x\n", retval
);
741 /* Data select rate register : 0x04 (write) */
742 static void fdctrl_write_rate (fdctrl_t
*fdctrl
, uint32_t value
)
745 if (fdctrl
->state
& FD_CTRL_RESET
) {
746 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
749 FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value
);
750 /* Reset: autoclear */
752 fdctrl
->state
|= FD_CTRL_RESET
;
753 fdctrl_reset(fdctrl
, 1);
754 fdctrl
->state
&= ~FD_CTRL_RESET
;
757 fdctrl
->state
|= FD_CTRL_SLEEP
;
758 fdctrl_reset(fdctrl
, 1);
760 // fdctrl.precomp = (value >> 2) & 0x07;
763 /* Digital input register : 0x07 (read-only) */
764 static uint32_t fdctrl_read_dir (fdctrl_t
*fdctrl
)
768 if (drv0(fdctrl
)->drflags
& FDRIVE_REVALIDATE
||
769 drv1(fdctrl
)->drflags
& FDRIVE_REVALIDATE
)
772 FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval
);
773 drv0(fdctrl
)->drflags
&= ~FDRIVE_REVALIDATE
;
774 drv1(fdctrl
)->drflags
&= ~FDRIVE_REVALIDATE
;
779 /* FIFO state control */
780 static void fdctrl_reset_fifo (fdctrl_t
*fdctrl
)
782 fdctrl
->data_dir
= FD_DIR_WRITE
;
783 fdctrl
->data_pos
= 0;
784 FD_SET_STATE(fdctrl
->data_state
, FD_STATE_CMD
);
787 /* Set FIFO status for the host to read */
788 static void fdctrl_set_fifo (fdctrl_t
*fdctrl
, int fifo_len
, int do_irq
)
790 fdctrl
->data_dir
= FD_DIR_READ
;
791 fdctrl
->data_len
= fifo_len
;
792 fdctrl
->data_pos
= 0;
793 FD_SET_STATE(fdctrl
->data_state
, FD_STATE_STATUS
);
795 fdctrl_raise_irq(fdctrl
, 0x00);
798 /* Set an error: unimplemented/unknown command */
799 static void fdctrl_unimplemented (fdctrl_t
*fdctrl
)
804 cur_drv
= get_cur_drv(fdctrl
);
805 fdctrl
->fifo
[0] = 0x60 | (cur_drv
->head
<< 2) | fdctrl
->cur_drv
;
806 fdctrl
->fifo
[1] = 0x00;
807 fdctrl
->fifo
[2] = 0x00;
808 fdctrl_set_fifo(fdctrl
, 3, 1);
810 // fdctrl_reset_fifo(fdctrl);
811 fdctrl
->fifo
[0] = 0x80;
812 fdctrl_set_fifo(fdctrl
, 1, 0);
816 /* Callback for transfer end (stop or abort) */
817 static void fdctrl_stop_transfer (fdctrl_t
*fdctrl
, uint8_t status0
,
818 uint8_t status1
, uint8_t status2
)
822 cur_drv
= get_cur_drv(fdctrl
);
823 FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
824 status0
, status1
, status2
,
825 status0
| (cur_drv
->head
<< 2) | fdctrl
->cur_drv
);
826 fdctrl
->fifo
[0] = status0
| (cur_drv
->head
<< 2) | fdctrl
->cur_drv
;
827 fdctrl
->fifo
[1] = status1
;
828 fdctrl
->fifo
[2] = status2
;
829 fdctrl
->fifo
[3] = cur_drv
->track
;
830 fdctrl
->fifo
[4] = cur_drv
->head
;
831 fdctrl
->fifo
[5] = cur_drv
->sect
;
832 fdctrl
->fifo
[6] = FD_SECTOR_SC
;
833 fdctrl
->data_dir
= FD_DIR_READ
;
834 if (fdctrl
->state
& FD_CTRL_BUSY
) {
835 DMA_release_DREQ(fdctrl
->dma_chann
);
836 fdctrl
->state
&= ~FD_CTRL_BUSY
;
838 fdctrl_set_fifo(fdctrl
, 7, 1);
841 /* Prepare a data transfer (either DMA or FIFO) */
842 static void fdctrl_start_transfer (fdctrl_t
*fdctrl
, int direction
)
848 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
849 cur_drv
= get_cur_drv(fdctrl
);
850 kt
= fdctrl
->fifo
[2];
851 kh
= fdctrl
->fifo
[3];
852 ks
= fdctrl
->fifo
[4];
853 FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
854 fdctrl
->cur_drv
, kh
, kt
, ks
,
855 _fd_sector(kh
, kt
, ks
, cur_drv
->last_sect
));
857 switch (fd_seek(cur_drv
, kh
, kt
, ks
, fdctrl
->config
& 0x40)) {
860 fdctrl_stop_transfer(fdctrl
, 0x40, 0x00, 0x00);
861 fdctrl
->fifo
[3] = kt
;
862 fdctrl
->fifo
[4] = kh
;
863 fdctrl
->fifo
[5] = ks
;
867 fdctrl_stop_transfer(fdctrl
, 0x40, 0x80, 0x00);
868 fdctrl
->fifo
[3] = kt
;
869 fdctrl
->fifo
[4] = kh
;
870 fdctrl
->fifo
[5] = ks
;
873 /* No seek enabled */
874 fdctrl_stop_transfer(fdctrl
, 0x40, 0x00, 0x00);
875 fdctrl
->fifo
[3] = kt
;
876 fdctrl
->fifo
[4] = kh
;
877 fdctrl
->fifo
[5] = ks
;
885 /* Set the FIFO state */
886 fdctrl
->data_dir
= direction
;
887 fdctrl
->data_pos
= 0;
888 FD_SET_STATE(fdctrl
->data_state
, FD_STATE_DATA
); /* FIFO ready for data */
889 if (fdctrl
->fifo
[0] & 0x80)
890 fdctrl
->data_state
|= FD_STATE_MULTI
;
892 fdctrl
->data_state
&= ~FD_STATE_MULTI
;
894 fdctrl
->data_state
|= FD_STATE_SEEK
;
896 fdctrl
->data_state
&= ~FD_STATE_SEEK
;
897 if (fdctrl
->fifo
[5] == 00) {
898 fdctrl
->data_len
= fdctrl
->fifo
[8];
901 fdctrl
->data_len
= 128 << fdctrl
->fifo
[5];
902 tmp
= (cur_drv
->last_sect
- ks
+ 1);
903 if (fdctrl
->fifo
[0] & 0x80)
904 tmp
+= cur_drv
->last_sect
;
905 fdctrl
->data_len
*= tmp
;
907 fdctrl
->eot
= fdctrl
->fifo
[6];
908 if (fdctrl
->dma_en
) {
910 /* DMA transfer are enabled. Check if DMA channel is well programmed */
911 dma_mode
= DMA_get_channel_mode(fdctrl
->dma_chann
);
912 dma_mode
= (dma_mode
>> 2) & 3;
913 FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
915 (128 << fdctrl
->fifo
[5]) *
916 (cur_drv
->last_sect
- ks
+ 1), fdctrl
->data_len
);
917 if (((direction
== FD_DIR_SCANE
|| direction
== FD_DIR_SCANL
||
918 direction
== FD_DIR_SCANH
) && dma_mode
== 0) ||
919 (direction
== FD_DIR_WRITE
&& dma_mode
== 2) ||
920 (direction
== FD_DIR_READ
&& dma_mode
== 1)) {
921 /* No access is allowed until DMA transfer has completed */
922 fdctrl
->state
|= FD_CTRL_BUSY
;
923 /* Now, we just have to wait for the DMA controller to
926 DMA_hold_DREQ(fdctrl
->dma_chann
);
927 DMA_schedule(fdctrl
->dma_chann
);
930 FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode
, direction
);
933 FLOPPY_DPRINTF("start non-DMA transfer\n");
934 /* IO based transfer: calculate len */
935 fdctrl_raise_irq(fdctrl
, 0x00);
940 /* Prepare a transfer of deleted data */
941 static void fdctrl_start_transfer_del (fdctrl_t
*fdctrl
, int direction
)
943 /* We don't handle deleted data,
944 * so we don't return *ANYTHING*
946 fdctrl_stop_transfer(fdctrl
, 0x60, 0x00, 0x00);
949 /* handlers for DMA transfers */
950 static int fdctrl_transfer_handler (void *opaque
, int nchan
,
951 int dma_pos
, int dma_len
)
955 int len
, start_pos
, rel_pos
;
956 uint8_t status0
= 0x00, status1
= 0x00, status2
= 0x00;
959 if (!(fdctrl
->state
& FD_CTRL_BUSY
)) {
960 FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
963 cur_drv
= get_cur_drv(fdctrl
);
964 if (fdctrl
->data_dir
== FD_DIR_SCANE
|| fdctrl
->data_dir
== FD_DIR_SCANL
||
965 fdctrl
->data_dir
== FD_DIR_SCANH
)
967 if (dma_len
> fdctrl
->data_len
)
968 dma_len
= fdctrl
->data_len
;
969 if (cur_drv
->bs
== NULL
) {
970 if (fdctrl
->data_dir
== FD_DIR_WRITE
)
971 fdctrl_stop_transfer(fdctrl
, 0x60, 0x00, 0x00);
973 fdctrl_stop_transfer(fdctrl
, 0x40, 0x00, 0x00);
977 rel_pos
= fdctrl
->data_pos
% FD_SECTOR_LEN
;
978 for (start_pos
= fdctrl
->data_pos
; fdctrl
->data_pos
< dma_len
;) {
979 len
= dma_len
- fdctrl
->data_pos
;
980 if (len
+ rel_pos
> FD_SECTOR_LEN
)
981 len
= FD_SECTOR_LEN
- rel_pos
;
982 FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
983 "(%d-0x%08x 0x%08x)\n", len
, dma_len
, fdctrl
->data_pos
,
984 fdctrl
->data_len
, fdctrl
->cur_drv
, cur_drv
->head
,
985 cur_drv
->track
, cur_drv
->sect
, fd_sector(cur_drv
),
986 fd_sector(cur_drv
) * 512);
987 if (fdctrl
->data_dir
!= FD_DIR_WRITE
||
988 len
< FD_SECTOR_LEN
|| rel_pos
!= 0) {
989 /* READ & SCAN commands and realign to a sector for WRITE */
990 if (bdrv_read(cur_drv
->bs
, fd_sector(cur_drv
),
991 fdctrl
->fifo
, 1) < 0) {
992 FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
994 /* Sure, image size is too small... */
995 memset(fdctrl
->fifo
, 0, FD_SECTOR_LEN
);
998 switch (fdctrl
->data_dir
) {
1001 DMA_write_memory (nchan
, fdctrl
->fifo
+ rel_pos
,
1002 fdctrl
->data_pos
, len
);
1003 /* cpu_physical_memory_write(addr + fdctrl->data_pos, */
1004 /* fdctrl->fifo + rel_pos, len); */
1007 /* WRITE commands */
1008 DMA_read_memory (nchan
, fdctrl
->fifo
+ rel_pos
,
1009 fdctrl
->data_pos
, len
);
1010 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1011 /* fdctrl->fifo + rel_pos, len); */
1012 if (bdrv_write(cur_drv
->bs
, fd_sector(cur_drv
),
1013 fdctrl
->fifo
, 1) < 0) {
1014 FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv
));
1015 fdctrl_stop_transfer(fdctrl
, 0x60, 0x00, 0x00);
1016 goto transfer_error
;
1022 uint8_t tmpbuf
[FD_SECTOR_LEN
];
1024 DMA_read_memory (nchan
, tmpbuf
, fdctrl
->data_pos
, len
);
1025 /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1027 ret
= memcmp(tmpbuf
, fdctrl
->fifo
+ rel_pos
, len
);
1032 if ((ret
< 0 && fdctrl
->data_dir
== FD_DIR_SCANL
) ||
1033 (ret
> 0 && fdctrl
->data_dir
== FD_DIR_SCANH
)) {
1040 fdctrl
->data_pos
+= len
;
1041 rel_pos
= fdctrl
->data_pos
% FD_SECTOR_LEN
;
1043 /* Seek to next sector */
1044 FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
1045 cur_drv
->head
, cur_drv
->track
, cur_drv
->sect
,
1047 fdctrl
->data_pos
- len
);
1048 /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1050 if (cur_drv
->sect
>= cur_drv
->last_sect
||
1051 cur_drv
->sect
== fdctrl
->eot
) {
1053 if (FD_MULTI_TRACK(fdctrl
->data_state
)) {
1054 if (cur_drv
->head
== 0 &&
1055 (cur_drv
->flags
& FDISK_DBL_SIDES
) != 0) {
1060 if ((cur_drv
->flags
& FDISK_DBL_SIDES
) == 0)
1067 FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1068 cur_drv
->head
, cur_drv
->track
,
1069 cur_drv
->sect
, fd_sector(cur_drv
));
1076 len
= fdctrl
->data_pos
- start_pos
;
1077 FLOPPY_DPRINTF("end transfer %d %d %d\n",
1078 fdctrl
->data_pos
, len
, fdctrl
->data_len
);
1079 if (fdctrl
->data_dir
== FD_DIR_SCANE
||
1080 fdctrl
->data_dir
== FD_DIR_SCANL
||
1081 fdctrl
->data_dir
== FD_DIR_SCANH
)
1083 if (FD_DID_SEEK(fdctrl
->data_state
))
1085 fdctrl
->data_len
-= len
;
1086 // if (fdctrl->data_len == 0)
1087 fdctrl_stop_transfer(fdctrl
, status0
, status1
, status2
);
1093 /* Data register : 0x05 */
1094 static uint32_t fdctrl_read_data (fdctrl_t
*fdctrl
)
1097 uint32_t retval
= 0;
1100 cur_drv
= get_cur_drv(fdctrl
);
1101 fdctrl
->state
&= ~FD_CTRL_SLEEP
;
1102 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_CMD
) {
1103 FLOPPY_ERROR("can't read data in CMD state\n");
1106 pos
= fdctrl
->data_pos
;
1107 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_DATA
) {
1108 pos
%= FD_SECTOR_LEN
;
1110 len
= fdctrl
->data_len
- fdctrl
->data_pos
;
1111 if (len
> FD_SECTOR_LEN
)
1112 len
= FD_SECTOR_LEN
;
1113 bdrv_read(cur_drv
->bs
, fd_sector(cur_drv
),
1117 retval
= fdctrl
->fifo
[pos
];
1118 if (++fdctrl
->data_pos
== fdctrl
->data_len
) {
1119 fdctrl
->data_pos
= 0;
1120 /* Switch from transfer mode to status mode
1121 * then from status mode to command mode
1123 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_DATA
) {
1124 fdctrl_stop_transfer(fdctrl
, 0x20, 0x00, 0x00);
1126 fdctrl_reset_fifo(fdctrl
);
1127 fdctrl_reset_irq(fdctrl
);
1130 FLOPPY_DPRINTF("data register: 0x%02x\n", retval
);
1135 static void fdctrl_format_sector (fdctrl_t
*fdctrl
)
1141 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1142 cur_drv
= get_cur_drv(fdctrl
);
1143 kt
= fdctrl
->fifo
[6];
1144 kh
= fdctrl
->fifo
[7];
1145 ks
= fdctrl
->fifo
[8];
1146 FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1147 fdctrl
->cur_drv
, kh
, kt
, ks
,
1148 _fd_sector(kh
, kt
, ks
, cur_drv
->last_sect
));
1150 switch (fd_seek(cur_drv
, kh
, kt
, ks
, fdctrl
->config
& 0x40)) {
1153 fdctrl_stop_transfer(fdctrl
, 0x40, 0x00, 0x00);
1154 fdctrl
->fifo
[3] = kt
;
1155 fdctrl
->fifo
[4] = kh
;
1156 fdctrl
->fifo
[5] = ks
;
1160 fdctrl_stop_transfer(fdctrl
, 0x40, 0x80, 0x00);
1161 fdctrl
->fifo
[3] = kt
;
1162 fdctrl
->fifo
[4] = kh
;
1163 fdctrl
->fifo
[5] = ks
;
1166 /* No seek enabled */
1167 fdctrl_stop_transfer(fdctrl
, 0x40, 0x00, 0x00);
1168 fdctrl
->fifo
[3] = kt
;
1169 fdctrl
->fifo
[4] = kh
;
1170 fdctrl
->fifo
[5] = ks
;
1174 fdctrl
->data_state
|= FD_STATE_SEEK
;
1179 memset(fdctrl
->fifo
, 0, FD_SECTOR_LEN
);
1180 if (cur_drv
->bs
== NULL
||
1181 bdrv_write(cur_drv
->bs
, fd_sector(cur_drv
), fdctrl
->fifo
, 1) < 0) {
1182 FLOPPY_ERROR("formating sector %d\n", fd_sector(cur_drv
));
1183 fdctrl_stop_transfer(fdctrl
, 0x60, 0x00, 0x00);
1185 if (cur_drv
->sect
== cur_drv
->last_sect
) {
1186 fdctrl
->data_state
&= ~FD_STATE_FORMAT
;
1187 /* Last sector done */
1188 if (FD_DID_SEEK(fdctrl
->data_state
))
1189 fdctrl_stop_transfer(fdctrl
, 0x20, 0x00, 0x00);
1191 fdctrl_stop_transfer(fdctrl
, 0x00, 0x00, 0x00);
1194 fdctrl
->data_pos
= 0;
1195 fdctrl
->data_len
= 4;
1200 static void fdctrl_write_data (fdctrl_t
*fdctrl
, uint32_t value
)
1204 cur_drv
= get_cur_drv(fdctrl
);
1206 if (fdctrl
->state
& FD_CTRL_RESET
) {
1207 FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1210 fdctrl
->state
&= ~FD_CTRL_SLEEP
;
1211 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_STATUS
) {
1212 FLOPPY_ERROR("can't write data in status mode\n");
1215 /* Is it write command time ? */
1216 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_DATA
) {
1217 /* FIFO data write */
1218 fdctrl
->fifo
[fdctrl
->data_pos
++] = value
;
1219 if (fdctrl
->data_pos
% FD_SECTOR_LEN
== (FD_SECTOR_LEN
- 1) ||
1220 fdctrl
->data_pos
== fdctrl
->data_len
) {
1221 bdrv_write(cur_drv
->bs
, fd_sector(cur_drv
),
1222 fdctrl
->fifo
, FD_SECTOR_LEN
);
1224 /* Switch from transfer mode to status mode
1225 * then from status mode to command mode
1227 if (FD_STATE(fdctrl
->data_state
) == FD_STATE_DATA
)
1228 fdctrl_stop_transfer(fdctrl
, 0x20, 0x00, 0x00);
1231 if (fdctrl
->data_pos
== 0) {
1233 switch (value
& 0x5F) {
1236 FLOPPY_DPRINTF("READ command\n");
1237 /* 8 parameters cmd */
1238 fdctrl
->data_len
= 9;
1241 /* READ_DELETED variants */
1242 FLOPPY_DPRINTF("READ_DELETED command\n");
1243 /* 8 parameters cmd */
1244 fdctrl
->data_len
= 9;
1247 /* SCAN_EQUAL variants */
1248 FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1249 /* 8 parameters cmd */
1250 fdctrl
->data_len
= 9;
1253 /* VERIFY variants */
1254 FLOPPY_DPRINTF("VERIFY command\n");
1255 /* 8 parameters cmd */
1256 fdctrl
->data_len
= 9;
1259 /* SCAN_LOW_OR_EQUAL variants */
1260 FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1261 /* 8 parameters cmd */
1262 fdctrl
->data_len
= 9;
1265 /* SCAN_HIGH_OR_EQUAL variants */
1266 FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1267 /* 8 parameters cmd */
1268 fdctrl
->data_len
= 9;
1273 switch (value
& 0x7F) {
1275 /* WRITE variants */
1276 FLOPPY_DPRINTF("WRITE command\n");
1277 /* 8 parameters cmd */
1278 fdctrl
->data_len
= 9;
1281 /* WRITE_DELETED variants */
1282 FLOPPY_DPRINTF("WRITE_DELETED command\n");
1283 /* 8 parameters cmd */
1284 fdctrl
->data_len
= 9;
1292 FLOPPY_DPRINTF("SPECIFY command\n");
1293 /* 1 parameter cmd */
1294 fdctrl
->data_len
= 3;
1297 /* SENSE_DRIVE_STATUS */
1298 FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1299 /* 1 parameter cmd */
1300 fdctrl
->data_len
= 2;
1304 FLOPPY_DPRINTF("RECALIBRATE command\n");
1305 /* 1 parameter cmd */
1306 fdctrl
->data_len
= 2;
1309 /* SENSE_INTERRUPT_STATUS */
1310 FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1311 fdctrl
->int_status
);
1312 /* No parameters cmd: returns status if no interrupt */
1315 fdctrl
->int_status
| (cur_drv
->head
<< 2) | fdctrl
->cur_drv
;
1317 /* XXX: int_status handling is broken for read/write
1318 commands, so we do this hack. It should be suppressed
1321 0x20 | (cur_drv
->head
<< 2) | fdctrl
->cur_drv
;
1323 fdctrl
->fifo
[1] = cur_drv
->track
;
1324 fdctrl_set_fifo(fdctrl
, 2, 0);
1325 fdctrl_reset_irq(fdctrl
);
1326 fdctrl
->int_status
= 0xC0;
1330 FLOPPY_DPRINTF("DUMPREG command\n");
1331 /* Drives position */
1332 fdctrl
->fifo
[0] = drv0(fdctrl
)->track
;
1333 fdctrl
->fifo
[1] = drv1(fdctrl
)->track
;
1334 fdctrl
->fifo
[2] = 0;
1335 fdctrl
->fifo
[3] = 0;
1337 fdctrl
->fifo
[4] = fdctrl
->timer0
;
1338 fdctrl
->fifo
[5] = (fdctrl
->timer1
<< 1) | fdctrl
->dma_en
;
1339 fdctrl
->fifo
[6] = cur_drv
->last_sect
;
1340 fdctrl
->fifo
[7] = (fdctrl
->lock
<< 7) |
1341 (cur_drv
->perpendicular
<< 2);
1342 fdctrl
->fifo
[8] = fdctrl
->config
;
1343 fdctrl
->fifo
[9] = fdctrl
->precomp_trk
;
1344 fdctrl_set_fifo(fdctrl
, 10, 0);
1348 FLOPPY_DPRINTF("SEEK command\n");
1349 /* 2 parameters cmd */
1350 fdctrl
->data_len
= 3;
1354 FLOPPY_DPRINTF("VERSION command\n");
1355 /* No parameters cmd */
1356 /* Controller's version */
1357 fdctrl
->fifo
[0] = fdctrl
->version
;
1358 fdctrl_set_fifo(fdctrl
, 1, 1);
1361 /* PERPENDICULAR_MODE */
1362 FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1363 /* 1 parameter cmd */
1364 fdctrl
->data_len
= 2;
1368 FLOPPY_DPRINTF("CONFIGURE command\n");
1369 /* 3 parameters cmd */
1370 fdctrl
->data_len
= 4;
1374 FLOPPY_DPRINTF("UNLOCK command\n");
1375 /* No parameters cmd */
1377 fdctrl
->fifo
[0] = 0;
1378 fdctrl_set_fifo(fdctrl
, 1, 0);
1381 /* POWERDOWN_MODE */
1382 FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1383 /* 2 parameters cmd */
1384 fdctrl
->data_len
= 3;
1388 FLOPPY_DPRINTF("PART_ID command\n");
1389 /* No parameters cmd */
1390 fdctrl
->fifo
[0] = 0x41; /* Stepping 1 */
1391 fdctrl_set_fifo(fdctrl
, 1, 0);
1395 FLOPPY_DPRINTF("SAVE command\n");
1396 /* No parameters cmd */
1397 fdctrl
->fifo
[0] = 0;
1398 fdctrl
->fifo
[1] = 0;
1399 /* Drives position */
1400 fdctrl
->fifo
[2] = drv0(fdctrl
)->track
;
1401 fdctrl
->fifo
[3] = drv1(fdctrl
)->track
;
1402 fdctrl
->fifo
[4] = 0;
1403 fdctrl
->fifo
[5] = 0;
1405 fdctrl
->fifo
[6] = fdctrl
->timer0
;
1406 fdctrl
->fifo
[7] = fdctrl
->timer1
;
1407 fdctrl
->fifo
[8] = cur_drv
->last_sect
;
1408 fdctrl
->fifo
[9] = (fdctrl
->lock
<< 7) |
1409 (cur_drv
->perpendicular
<< 2);
1410 fdctrl
->fifo
[10] = fdctrl
->config
;
1411 fdctrl
->fifo
[11] = fdctrl
->precomp_trk
;
1412 fdctrl
->fifo
[12] = fdctrl
->pwrd
;
1413 fdctrl
->fifo
[13] = 0;
1414 fdctrl
->fifo
[14] = 0;
1415 fdctrl_set_fifo(fdctrl
, 15, 1);
1419 FLOPPY_DPRINTF("OPTION command\n");
1420 /* 1 parameter cmd */
1421 fdctrl
->data_len
= 2;
1425 FLOPPY_DPRINTF("READ_TRACK command\n");
1426 /* 8 parameters cmd */
1427 fdctrl
->data_len
= 9;
1431 FLOPPY_DPRINTF("READ_ID command\n");
1432 /* 1 parameter cmd */
1433 fdctrl
->data_len
= 2;
1437 FLOPPY_DPRINTF("RESTORE command\n");
1438 /* 17 parameters cmd */
1439 fdctrl
->data_len
= 18;
1443 FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1444 /* 5 parameters cmd */
1445 fdctrl
->data_len
= 6;
1448 /* DRIVE_SPECIFICATION_COMMAND */
1449 FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1450 /* 5 parameters cmd */
1451 fdctrl
->data_len
= 6;
1454 /* RELATIVE_SEEK_OUT */
1455 FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1456 /* 2 parameters cmd */
1457 fdctrl
->data_len
= 3;
1461 FLOPPY_DPRINTF("LOCK command\n");
1462 /* No parameters cmd */
1464 fdctrl
->fifo
[0] = 0x10;
1465 fdctrl_set_fifo(fdctrl
, 1, 1);
1468 /* FORMAT_AND_WRITE */
1469 FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1470 /* 10 parameters cmd */
1471 fdctrl
->data_len
= 11;
1474 /* RELATIVE_SEEK_IN */
1475 FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1476 /* 2 parameters cmd */
1477 fdctrl
->data_len
= 3;
1480 /* Unknown command */
1481 FLOPPY_ERROR("unknown command: 0x%02x\n", value
);
1482 fdctrl_unimplemented(fdctrl
);
1487 FLOPPY_DPRINTF("%s: %02x\n", __func__
, value
);
1488 fdctrl
->fifo
[fdctrl
->data_pos
] = value
;
1489 if (++fdctrl
->data_pos
== fdctrl
->data_len
) {
1490 /* We now have all parameters
1491 * and will be able to treat the command
1493 if (fdctrl
->data_state
& FD_STATE_FORMAT
) {
1494 fdctrl_format_sector(fdctrl
);
1497 switch (fdctrl
->fifo
[0] & 0x1F) {
1501 FLOPPY_DPRINTF("treat READ command\n");
1502 fdctrl_start_transfer(fdctrl
, FD_DIR_READ
);
1506 /* READ_DELETED variants */
1507 // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1508 FLOPPY_ERROR("treat READ_DELETED command\n");
1509 fdctrl_start_transfer_del(fdctrl
, FD_DIR_READ
);
1512 /* VERIFY variants */
1513 // FLOPPY_DPRINTF("treat VERIFY command\n");
1514 FLOPPY_ERROR("treat VERIFY command\n");
1515 fdctrl_stop_transfer(fdctrl
, 0x20, 0x00, 0x00);
1518 /* SCAN_EQUAL variants */
1519 // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1520 FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1521 fdctrl_start_transfer(fdctrl
, FD_DIR_SCANE
);
1524 /* SCAN_LOW_OR_EQUAL variants */
1525 // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1526 FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1527 fdctrl_start_transfer(fdctrl
, FD_DIR_SCANL
);
1530 /* SCAN_HIGH_OR_EQUAL variants */
1531 // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1532 FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1533 fdctrl_start_transfer(fdctrl
, FD_DIR_SCANH
);
1538 switch (fdctrl
->fifo
[0] & 0x3F) {
1540 /* WRITE variants */
1541 FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl
->fifo
[0]);
1542 fdctrl_start_transfer(fdctrl
, FD_DIR_WRITE
);
1545 /* WRITE_DELETED variants */
1546 // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1547 FLOPPY_ERROR("treat WRITE_DELETED command\n");
1548 fdctrl_start_transfer_del(fdctrl
, FD_DIR_WRITE
);
1553 switch (fdctrl
->fifo
[0]) {
1556 FLOPPY_DPRINTF("treat SPECIFY command\n");
1557 fdctrl
->timer0
= (fdctrl
->fifo
[1] >> 4) & 0xF;
1558 fdctrl
->timer1
= fdctrl
->fifo
[2] >> 1;
1559 fdctrl
->dma_en
= 1 - (fdctrl
->fifo
[2] & 1) ;
1560 /* No result back */
1561 fdctrl_reset_fifo(fdctrl
);
1564 /* SENSE_DRIVE_STATUS */
1565 FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1566 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1567 cur_drv
= get_cur_drv(fdctrl
);
1568 cur_drv
->head
= (fdctrl
->fifo
[1] >> 2) & 1;
1569 /* 1 Byte status back */
1570 fdctrl
->fifo
[0] = (cur_drv
->ro
<< 6) |
1571 (cur_drv
->track
== 0 ? 0x10 : 0x00) |
1572 (cur_drv
->head
<< 2) |
1575 fdctrl_set_fifo(fdctrl
, 1, 0);
1579 FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1580 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1581 cur_drv
= get_cur_drv(fdctrl
);
1582 fd_recalibrate(cur_drv
);
1583 fdctrl_reset_fifo(fdctrl
);
1584 /* Raise Interrupt */
1585 fdctrl_raise_irq(fdctrl
, 0x20);
1589 FLOPPY_DPRINTF("treat SEEK command\n");
1590 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1591 cur_drv
= get_cur_drv(fdctrl
);
1593 if (fdctrl
->fifo
[2] <= cur_drv
->track
)
1597 fdctrl_reset_fifo(fdctrl
);
1598 if (fdctrl
->fifo
[2] > cur_drv
->max_track
) {
1599 fdctrl_raise_irq(fdctrl
, 0x60);
1601 cur_drv
->track
= fdctrl
->fifo
[2];
1602 /* Raise Interrupt */
1603 fdctrl_raise_irq(fdctrl
, 0x20);
1607 /* PERPENDICULAR_MODE */
1608 FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1609 if (fdctrl
->fifo
[1] & 0x80)
1610 cur_drv
->perpendicular
= fdctrl
->fifo
[1] & 0x7;
1611 /* No result back */
1612 fdctrl_reset_fifo(fdctrl
);
1616 FLOPPY_DPRINTF("treat CONFIGURE command\n");
1617 fdctrl
->config
= fdctrl
->fifo
[2];
1618 fdctrl
->precomp_trk
= fdctrl
->fifo
[3];
1619 /* No result back */
1620 fdctrl_reset_fifo(fdctrl
);
1623 /* POWERDOWN_MODE */
1624 FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1625 fdctrl
->pwrd
= fdctrl
->fifo
[1];
1626 fdctrl
->fifo
[0] = fdctrl
->fifo
[1];
1627 fdctrl_set_fifo(fdctrl
, 1, 1);
1631 FLOPPY_DPRINTF("treat OPTION command\n");
1632 /* No result back */
1633 fdctrl_reset_fifo(fdctrl
);
1637 // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1638 FLOPPY_ERROR("treat READ_TRACK command\n");
1639 fdctrl_start_transfer(fdctrl
, FD_DIR_READ
);
1643 FLOPPY_DPRINTF("treat READ_ID command\n");
1644 /* XXX: should set main status register to busy */
1645 cur_drv
->head
= (fdctrl
->fifo
[1] >> 2) & 1;
1646 qemu_mod_timer(fdctrl
->result_timer
,
1647 qemu_get_clock(vm_clock
) + (ticks_per_sec
/ 50));
1651 FLOPPY_DPRINTF("treat RESTORE command\n");
1652 /* Drives position */
1653 drv0(fdctrl
)->track
= fdctrl
->fifo
[3];
1654 drv1(fdctrl
)->track
= fdctrl
->fifo
[4];
1656 fdctrl
->timer0
= fdctrl
->fifo
[7];
1657 fdctrl
->timer1
= fdctrl
->fifo
[8];
1658 cur_drv
->last_sect
= fdctrl
->fifo
[9];
1659 fdctrl
->lock
= fdctrl
->fifo
[10] >> 7;
1660 cur_drv
->perpendicular
= (fdctrl
->fifo
[10] >> 2) & 0xF;
1661 fdctrl
->config
= fdctrl
->fifo
[11];
1662 fdctrl
->precomp_trk
= fdctrl
->fifo
[12];
1663 fdctrl
->pwrd
= fdctrl
->fifo
[13];
1664 fdctrl_reset_fifo(fdctrl
);
1668 FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
1669 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1670 cur_drv
= get_cur_drv(fdctrl
);
1671 fdctrl
->data_state
|= FD_STATE_FORMAT
;
1672 if (fdctrl
->fifo
[0] & 0x80)
1673 fdctrl
->data_state
|= FD_STATE_MULTI
;
1675 fdctrl
->data_state
&= ~FD_STATE_MULTI
;
1676 fdctrl
->data_state
&= ~FD_STATE_SEEK
;
1678 fdctrl
->fifo
[2] > 7 ? 16384 : 128 << fdctrl
->fifo
[2];
1680 cur_drv
->last_sect
=
1681 cur_drv
->flags
& FDISK_DBL_SIDES
? fdctrl
->fifo
[3] :
1682 fdctrl
->fifo
[3] / 2;
1684 cur_drv
->last_sect
= fdctrl
->fifo
[3];
1686 /* Bochs BIOS is buggy and don't send format informations
1687 * for each sector. So, pretend all's done right now...
1689 fdctrl
->data_state
&= ~FD_STATE_FORMAT
;
1690 fdctrl_stop_transfer(fdctrl
, 0x00, 0x00, 0x00);
1693 /* DRIVE_SPECIFICATION_COMMAND */
1694 FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1695 if (fdctrl
->fifo
[fdctrl
->data_pos
- 1] & 0x80) {
1696 /* Command parameters done */
1697 if (fdctrl
->fifo
[fdctrl
->data_pos
- 1] & 0x40) {
1698 fdctrl
->fifo
[0] = fdctrl
->fifo
[1];
1699 fdctrl
->fifo
[2] = 0;
1700 fdctrl
->fifo
[3] = 0;
1701 fdctrl_set_fifo(fdctrl
, 4, 1);
1703 fdctrl_reset_fifo(fdctrl
);
1705 } else if (fdctrl
->data_len
> 7) {
1707 fdctrl
->fifo
[0] = 0x80 |
1708 (cur_drv
->head
<< 2) | fdctrl
->cur_drv
;
1709 fdctrl_set_fifo(fdctrl
, 1, 1);
1713 /* RELATIVE_SEEK_OUT */
1714 FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1715 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1716 cur_drv
= get_cur_drv(fdctrl
);
1719 if (fdctrl
->fifo
[2] + cur_drv
->track
>= cur_drv
->max_track
) {
1720 cur_drv
->track
= cur_drv
->max_track
- 1;
1722 cur_drv
->track
+= fdctrl
->fifo
[2];
1724 fdctrl_reset_fifo(fdctrl
);
1725 fdctrl_raise_irq(fdctrl
, 0x20);
1728 /* FORMAT_AND_WRITE */
1729 // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1730 FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1731 fdctrl_unimplemented(fdctrl
);
1734 /* RELATIVE_SEEK_IN */
1735 FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1736 fdctrl
->cur_drv
= fdctrl
->fifo
[1] & 1;
1737 cur_drv
= get_cur_drv(fdctrl
);
1740 if (fdctrl
->fifo
[2] > cur_drv
->track
) {
1743 cur_drv
->track
-= fdctrl
->fifo
[2];
1745 fdctrl_reset_fifo(fdctrl
);
1746 /* Raise Interrupt */
1747 fdctrl_raise_irq(fdctrl
, 0x20);
1753 static void fdctrl_result_timer(void *opaque
)
1755 fdctrl_t
*fdctrl
= opaque
;
1756 fdctrl_stop_transfer(fdctrl
, 0x00, 0x00, 0x00);