root / hw / fdc.c @ 60fe76f3
History | View | Annotate | Download (60.4 kB)
1 |
/*
|
---|---|
2 |
* QEMU Floppy disk emulator (Intel 82078)
|
3 |
*
|
4 |
* Copyright (c) 2003, 2007 Jocelyn Mayer
|
5 |
*
|
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:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
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
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
/*
|
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.
|
27 |
*/
|
28 |
#include "hw.h" |
29 |
#include "fdc.h" |
30 |
#include "block.h" |
31 |
#include "qemu-timer.h" |
32 |
#include "isa.h" |
33 |
|
34 |
/********************************************************/
|
35 |
/* debug Floppy devices */
|
36 |
//#define DEBUG_FLOPPY
|
37 |
|
38 |
#ifdef DEBUG_FLOPPY
|
39 |
#define FLOPPY_DPRINTF(fmt, args...) \
|
40 |
do { printf("FLOPPY: " fmt , ##args); } while (0) |
41 |
#else
|
42 |
#define FLOPPY_DPRINTF(fmt, args...)
|
43 |
#endif
|
44 |
|
45 |
#define FLOPPY_ERROR(fmt, args...) \
|
46 |
do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0) |
47 |
|
48 |
/********************************************************/
|
49 |
/* Floppy drive emulation */
|
50 |
|
51 |
/* Will always be a fixed parameter for us */
|
52 |
#define FD_SECTOR_LEN 512 |
53 |
#define FD_SECTOR_SC 2 /* Sector size code */ |
54 |
|
55 |
/* Floppy disk drive emulation */
|
56 |
typedef enum fdisk_type_t { |
57 |
FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */ |
58 |
FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */ |
59 |
FDRIVE_DISK_720 = 0x03, /* 720 kB disk */ |
60 |
FDRIVE_DISK_USER = 0x04, /* User defined geometry */ |
61 |
FDRIVE_DISK_NONE = 0x05, /* No disk */ |
62 |
} fdisk_type_t; |
63 |
|
64 |
typedef enum fdrive_type_t { |
65 |
FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */ |
66 |
FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */ |
67 |
FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */ |
68 |
FDRIVE_DRV_NONE = 0x03, /* No drive connected */ |
69 |
} fdrive_type_t; |
70 |
|
71 |
typedef enum fdrive_flags_t { |
72 |
FDRIVE_MOTOR_ON = 0x01, /* motor on/off */ |
73 |
} fdrive_flags_t; |
74 |
|
75 |
typedef enum fdisk_flags_t { |
76 |
FDISK_DBL_SIDES = 0x01,
|
77 |
} fdisk_flags_t; |
78 |
|
79 |
typedef struct fdrive_t { |
80 |
BlockDriverState *bs; |
81 |
/* Drive status */
|
82 |
fdrive_type_t drive; |
83 |
fdrive_flags_t drflags; |
84 |
uint8_t perpendicular; /* 2.88 MB access mode */
|
85 |
/* Position */
|
86 |
uint8_t head; |
87 |
uint8_t track; |
88 |
uint8_t sect; |
89 |
/* Last operation status */
|
90 |
uint8_t dir; /* Direction */
|
91 |
uint8_t rw; /* Read/write */
|
92 |
/* Media */
|
93 |
fdisk_flags_t flags; |
94 |
uint8_t last_sect; /* Nb sector per track */
|
95 |
uint8_t max_track; /* Nb of tracks */
|
96 |
uint16_t bps; /* Bytes per sector */
|
97 |
uint8_t ro; /* Is read-only */
|
98 |
} fdrive_t; |
99 |
|
100 |
static void fd_init (fdrive_t *drv, BlockDriverState *bs) |
101 |
{ |
102 |
/* Drive */
|
103 |
drv->bs = bs; |
104 |
drv->drive = FDRIVE_DRV_NONE; |
105 |
drv->drflags = 0;
|
106 |
drv->perpendicular = 0;
|
107 |
/* Disk */
|
108 |
drv->last_sect = 0;
|
109 |
drv->max_track = 0;
|
110 |
} |
111 |
|
112 |
static int _fd_sector (uint8_t head, uint8_t track, |
113 |
uint8_t sect, uint8_t last_sect) |
114 |
{ |
115 |
return (((track * 2) + head) * last_sect) + sect - 1; |
116 |
} |
117 |
|
118 |
/* Returns current position, in sectors, for given drive */
|
119 |
static int fd_sector (fdrive_t *drv) |
120 |
{ |
121 |
return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
|
122 |
} |
123 |
|
124 |
static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect, |
125 |
int enable_seek)
|
126 |
{ |
127 |
uint32_t sector; |
128 |
int ret;
|
129 |
|
130 |
if (track > drv->max_track ||
|
131 |
(head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) { |
132 |
FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
|
133 |
head, track, sect, 1,
|
134 |
(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, |
135 |
drv->max_track, drv->last_sect); |
136 |
return 2; |
137 |
} |
138 |
if (sect > drv->last_sect) {
|
139 |
FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
|
140 |
head, track, sect, 1,
|
141 |
(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, |
142 |
drv->max_track, drv->last_sect); |
143 |
return 3; |
144 |
} |
145 |
sector = _fd_sector(head, track, sect, drv->last_sect); |
146 |
ret = 0;
|
147 |
if (sector != fd_sector(drv)) {
|
148 |
#if 0
|
149 |
if (!enable_seek) {
|
150 |
FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
|
151 |
head, track, sect, 1, drv->max_track, drv->last_sect);
|
152 |
return 4;
|
153 |
}
|
154 |
#endif
|
155 |
drv->head = head; |
156 |
if (drv->track != track)
|
157 |
ret = 1;
|
158 |
drv->track = track; |
159 |
drv->sect = sect; |
160 |
} |
161 |
|
162 |
return ret;
|
163 |
} |
164 |
|
165 |
/* Set drive back to track 0 */
|
166 |
static void fd_recalibrate (fdrive_t *drv) |
167 |
{ |
168 |
FLOPPY_DPRINTF("recalibrate\n");
|
169 |
drv->head = 0;
|
170 |
drv->track = 0;
|
171 |
drv->sect = 1;
|
172 |
drv->dir = 1;
|
173 |
drv->rw = 0;
|
174 |
} |
175 |
|
176 |
/* Recognize floppy formats */
|
177 |
typedef struct fd_format_t { |
178 |
fdrive_type_t drive; |
179 |
fdisk_type_t disk; |
180 |
uint8_t last_sect; |
181 |
uint8_t max_track; |
182 |
uint8_t max_head; |
183 |
const char *str; |
184 |
} fd_format_t; |
185 |
|
186 |
static const fd_format_t fd_formats[] = { |
187 |
/* First entry is default format */
|
188 |
/* 1.44 MB 3"1/2 floppy disks */
|
189 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", }, |
190 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", }, |
191 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", }, |
192 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", }, |
193 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", }, |
194 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", }, |
195 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", }, |
196 |
{ FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", }, |
197 |
/* 2.88 MB 3"1/2 floppy disks */
|
198 |
{ FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", }, |
199 |
{ FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", }, |
200 |
{ FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", }, |
201 |
{ FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", }, |
202 |
{ FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", }, |
203 |
/* 720 kB 3"1/2 floppy disks */
|
204 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", }, |
205 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", }, |
206 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", }, |
207 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", }, |
208 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", }, |
209 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", }, |
210 |
/* 1.2 MB 5"1/4 floppy disks */
|
211 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", }, |
212 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", }, |
213 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", }, |
214 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", }, |
215 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", }, |
216 |
/* 720 kB 5"1/4 floppy disks */
|
217 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", }, |
218 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", }, |
219 |
/* 360 kB 5"1/4 floppy disks */
|
220 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", }, |
221 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", }, |
222 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", }, |
223 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", }, |
224 |
/* 320 kB 5"1/4 floppy disks */
|
225 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", }, |
226 |
{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", }, |
227 |
/* 360 kB must match 5"1/4 better than 3"1/2... */
|
228 |
{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", }, |
229 |
/* end */
|
230 |
{ FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, }, |
231 |
}; |
232 |
|
233 |
/* Revalidate a disk drive after a disk change */
|
234 |
static void fd_revalidate (fdrive_t *drv) |
235 |
{ |
236 |
const fd_format_t *parse;
|
237 |
int64_t nb_sectors, size; |
238 |
int i, first_match, match;
|
239 |
int nb_heads, max_track, last_sect, ro;
|
240 |
|
241 |
FLOPPY_DPRINTF("revalidate\n");
|
242 |
if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) { |
243 |
ro = bdrv_is_read_only(drv->bs); |
244 |
bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect); |
245 |
if (nb_heads != 0 && max_track != 0 && last_sect != 0) { |
246 |
FLOPPY_DPRINTF("User defined disk (%d %d %d)",
|
247 |
nb_heads - 1, max_track, last_sect);
|
248 |
} else {
|
249 |
bdrv_get_geometry(drv->bs, &nb_sectors); |
250 |
match = -1;
|
251 |
first_match = -1;
|
252 |
for (i = 0;; i++) { |
253 |
parse = &fd_formats[i]; |
254 |
if (parse->drive == FDRIVE_DRV_NONE)
|
255 |
break;
|
256 |
if (drv->drive == parse->drive ||
|
257 |
drv->drive == FDRIVE_DRV_NONE) { |
258 |
size = (parse->max_head + 1) * parse->max_track *
|
259 |
parse->last_sect; |
260 |
if (nb_sectors == size) {
|
261 |
match = i; |
262 |
break;
|
263 |
} |
264 |
if (first_match == -1) |
265 |
first_match = i; |
266 |
} |
267 |
} |
268 |
if (match == -1) { |
269 |
if (first_match == -1) |
270 |
match = 1;
|
271 |
else
|
272 |
match = first_match; |
273 |
parse = &fd_formats[match]; |
274 |
} |
275 |
nb_heads = parse->max_head + 1;
|
276 |
max_track = parse->max_track; |
277 |
last_sect = parse->last_sect; |
278 |
drv->drive = parse->drive; |
279 |
FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
|
280 |
nb_heads, max_track, last_sect, ro ? "ro" : "rw"); |
281 |
} |
282 |
if (nb_heads == 1) { |
283 |
drv->flags &= ~FDISK_DBL_SIDES; |
284 |
} else {
|
285 |
drv->flags |= FDISK_DBL_SIDES; |
286 |
} |
287 |
drv->max_track = max_track; |
288 |
drv->last_sect = last_sect; |
289 |
drv->ro = ro; |
290 |
} else {
|
291 |
FLOPPY_DPRINTF("No disk in drive\n");
|
292 |
drv->last_sect = 0;
|
293 |
drv->max_track = 0;
|
294 |
drv->flags &= ~FDISK_DBL_SIDES; |
295 |
} |
296 |
} |
297 |
|
298 |
/* Motor control */
|
299 |
static void fd_start (fdrive_t *drv) |
300 |
{ |
301 |
drv->drflags |= FDRIVE_MOTOR_ON; |
302 |
} |
303 |
|
304 |
static void fd_stop (fdrive_t *drv) |
305 |
{ |
306 |
drv->drflags &= ~FDRIVE_MOTOR_ON; |
307 |
} |
308 |
|
309 |
/* Re-initialise a drives (motor off, repositioned) */
|
310 |
static void fd_reset (fdrive_t *drv) |
311 |
{ |
312 |
fd_stop(drv); |
313 |
fd_recalibrate(drv); |
314 |
} |
315 |
|
316 |
/********************************************************/
|
317 |
/* Intel 82078 floppy disk controller emulation */
|
318 |
|
319 |
static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq); |
320 |
static void fdctrl_reset_fifo (fdctrl_t *fdctrl); |
321 |
static int fdctrl_transfer_handler (void *opaque, int nchan, |
322 |
int dma_pos, int dma_len); |
323 |
static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status); |
324 |
static void fdctrl_result_timer(void *opaque); |
325 |
|
326 |
static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
|
327 |
static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
|
328 |
static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value); |
329 |
static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
|
330 |
static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value); |
331 |
static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
|
332 |
static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value); |
333 |
static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
|
334 |
static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value); |
335 |
static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
|
336 |
|
337 |
enum {
|
338 |
FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */ |
339 |
FD_CTRL_RESET = 0x02,
|
340 |
FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */ |
341 |
FD_CTRL_BUSY = 0x08, /* dma transfer in progress */ |
342 |
FD_CTRL_INTR = 0x10,
|
343 |
}; |
344 |
|
345 |
enum {
|
346 |
FD_DIR_WRITE = 0,
|
347 |
FD_DIR_READ = 1,
|
348 |
FD_DIR_SCANE = 2,
|
349 |
FD_DIR_SCANL = 3,
|
350 |
FD_DIR_SCANH = 4,
|
351 |
}; |
352 |
|
353 |
enum {
|
354 |
FD_STATE_CMD = 0x00,
|
355 |
FD_STATE_STATUS = 0x01,
|
356 |
FD_STATE_DATA = 0x02,
|
357 |
FD_STATE_STATE = 0x03,
|
358 |
FD_STATE_MULTI = 0x10,
|
359 |
FD_STATE_SEEK = 0x20,
|
360 |
FD_STATE_FORMAT = 0x40,
|
361 |
}; |
362 |
|
363 |
#define FD_STATE(state) ((state) & FD_STATE_STATE)
|
364 |
#define FD_SET_STATE(state, new_state) \
|
365 |
do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0) |
366 |
#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
|
367 |
#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
|
368 |
#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
|
369 |
|
370 |
struct fdctrl_t {
|
371 |
fdctrl_t *fdctrl; |
372 |
/* Controller's identification */
|
373 |
uint8_t version; |
374 |
/* HW */
|
375 |
qemu_irq irq; |
376 |
int dma_chann;
|
377 |
target_phys_addr_t io_base; |
378 |
/* Controller state */
|
379 |
QEMUTimer *result_timer; |
380 |
uint8_t state; |
381 |
uint8_t dma_en; |
382 |
uint8_t cur_drv; |
383 |
uint8_t bootsel; |
384 |
/* Command FIFO */
|
385 |
uint8_t fifo[FD_SECTOR_LEN]; |
386 |
uint32_t data_pos; |
387 |
uint32_t data_len; |
388 |
uint8_t data_state; |
389 |
uint8_t data_dir; |
390 |
uint8_t int_status; |
391 |
uint8_t eot; /* last wanted sector */
|
392 |
/* States kept only to be returned back */
|
393 |
/* Timers state */
|
394 |
uint8_t timer0; |
395 |
uint8_t timer1; |
396 |
/* precompensation */
|
397 |
uint8_t precomp_trk; |
398 |
uint8_t config; |
399 |
uint8_t lock; |
400 |
/* Power down config (also with status regB access mode */
|
401 |
uint8_t pwrd; |
402 |
/* Sun4m quirks? */
|
403 |
int sun4m;
|
404 |
/* Floppy drives */
|
405 |
fdrive_t drives[2];
|
406 |
}; |
407 |
|
408 |
static uint32_t fdctrl_read (void *opaque, uint32_t reg) |
409 |
{ |
410 |
fdctrl_t *fdctrl = opaque; |
411 |
uint32_t retval; |
412 |
|
413 |
switch (reg & 0x07) { |
414 |
case 0x00: |
415 |
if (fdctrl->sun4m) {
|
416 |
// Identify to Linux as S82078B
|
417 |
retval = fdctrl_read_statusB(fdctrl); |
418 |
} else {
|
419 |
retval = (uint32_t)(-1);
|
420 |
} |
421 |
break;
|
422 |
case 0x01: |
423 |
retval = fdctrl_read_statusB(fdctrl); |
424 |
break;
|
425 |
case 0x02: |
426 |
retval = fdctrl_read_dor(fdctrl); |
427 |
break;
|
428 |
case 0x03: |
429 |
retval = fdctrl_read_tape(fdctrl); |
430 |
break;
|
431 |
case 0x04: |
432 |
retval = fdctrl_read_main_status(fdctrl); |
433 |
break;
|
434 |
case 0x05: |
435 |
retval = fdctrl_read_data(fdctrl); |
436 |
break;
|
437 |
case 0x07: |
438 |
retval = fdctrl_read_dir(fdctrl); |
439 |
break;
|
440 |
default:
|
441 |
retval = (uint32_t)(-1);
|
442 |
break;
|
443 |
} |
444 |
FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval); |
445 |
|
446 |
return retval;
|
447 |
} |
448 |
|
449 |
static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value) |
450 |
{ |
451 |
fdctrl_t *fdctrl = opaque; |
452 |
|
453 |
FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value); |
454 |
|
455 |
switch (reg & 0x07) { |
456 |
case 0x02: |
457 |
fdctrl_write_dor(fdctrl, value); |
458 |
break;
|
459 |
case 0x03: |
460 |
fdctrl_write_tape(fdctrl, value); |
461 |
break;
|
462 |
case 0x04: |
463 |
fdctrl_write_rate(fdctrl, value); |
464 |
break;
|
465 |
case 0x05: |
466 |
fdctrl_write_data(fdctrl, value); |
467 |
break;
|
468 |
default:
|
469 |
break;
|
470 |
} |
471 |
} |
472 |
|
473 |
static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg) |
474 |
{ |
475 |
return fdctrl_read(opaque, (uint32_t)reg);
|
476 |
} |
477 |
|
478 |
static void fdctrl_write_mem (void *opaque, |
479 |
target_phys_addr_t reg, uint32_t value) |
480 |
{ |
481 |
fdctrl_write(opaque, (uint32_t)reg, value); |
482 |
} |
483 |
|
484 |
static CPUReadMemoryFunc *fdctrl_mem_read[3] = { |
485 |
fdctrl_read_mem, |
486 |
fdctrl_read_mem, |
487 |
fdctrl_read_mem, |
488 |
}; |
489 |
|
490 |
static CPUWriteMemoryFunc *fdctrl_mem_write[3] = { |
491 |
fdctrl_write_mem, |
492 |
fdctrl_write_mem, |
493 |
fdctrl_write_mem, |
494 |
}; |
495 |
|
496 |
static void fd_save (QEMUFile *f, fdrive_t *fd) |
497 |
{ |
498 |
uint8_t tmp; |
499 |
|
500 |
tmp = fd->drflags; |
501 |
qemu_put_8s(f, &tmp); |
502 |
qemu_put_8s(f, &fd->head); |
503 |
qemu_put_8s(f, &fd->track); |
504 |
qemu_put_8s(f, &fd->sect); |
505 |
qemu_put_8s(f, &fd->dir); |
506 |
qemu_put_8s(f, &fd->rw); |
507 |
} |
508 |
|
509 |
static void fdc_save (QEMUFile *f, void *opaque) |
510 |
{ |
511 |
fdctrl_t *s = opaque; |
512 |
|
513 |
qemu_put_8s(f, &s->state); |
514 |
qemu_put_8s(f, &s->dma_en); |
515 |
qemu_put_8s(f, &s->cur_drv); |
516 |
qemu_put_8s(f, &s->bootsel); |
517 |
qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN); |
518 |
qemu_put_be32s(f, &s->data_pos); |
519 |
qemu_put_be32s(f, &s->data_len); |
520 |
qemu_put_8s(f, &s->data_state); |
521 |
qemu_put_8s(f, &s->data_dir); |
522 |
qemu_put_8s(f, &s->int_status); |
523 |
qemu_put_8s(f, &s->eot); |
524 |
qemu_put_8s(f, &s->timer0); |
525 |
qemu_put_8s(f, &s->timer1); |
526 |
qemu_put_8s(f, &s->precomp_trk); |
527 |
qemu_put_8s(f, &s->config); |
528 |
qemu_put_8s(f, &s->lock); |
529 |
qemu_put_8s(f, &s->pwrd); |
530 |
fd_save(f, &s->drives[0]);
|
531 |
fd_save(f, &s->drives[1]);
|
532 |
} |
533 |
|
534 |
static int fd_load (QEMUFile *f, fdrive_t *fd) |
535 |
{ |
536 |
uint8_t tmp; |
537 |
|
538 |
qemu_get_8s(f, &tmp); |
539 |
fd->drflags = tmp; |
540 |
qemu_get_8s(f, &fd->head); |
541 |
qemu_get_8s(f, &fd->track); |
542 |
qemu_get_8s(f, &fd->sect); |
543 |
qemu_get_8s(f, &fd->dir); |
544 |
qemu_get_8s(f, &fd->rw); |
545 |
|
546 |
return 0; |
547 |
} |
548 |
|
549 |
static int fdc_load (QEMUFile *f, void *opaque, int version_id) |
550 |
{ |
551 |
fdctrl_t *s = opaque; |
552 |
int ret;
|
553 |
|
554 |
if (version_id != 1) |
555 |
return -EINVAL;
|
556 |
|
557 |
qemu_get_8s(f, &s->state); |
558 |
qemu_get_8s(f, &s->dma_en); |
559 |
qemu_get_8s(f, &s->cur_drv); |
560 |
qemu_get_8s(f, &s->bootsel); |
561 |
qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN); |
562 |
qemu_get_be32s(f, &s->data_pos); |
563 |
qemu_get_be32s(f, &s->data_len); |
564 |
qemu_get_8s(f, &s->data_state); |
565 |
qemu_get_8s(f, &s->data_dir); |
566 |
qemu_get_8s(f, &s->int_status); |
567 |
qemu_get_8s(f, &s->eot); |
568 |
qemu_get_8s(f, &s->timer0); |
569 |
qemu_get_8s(f, &s->timer1); |
570 |
qemu_get_8s(f, &s->precomp_trk); |
571 |
qemu_get_8s(f, &s->config); |
572 |
qemu_get_8s(f, &s->lock); |
573 |
qemu_get_8s(f, &s->pwrd); |
574 |
|
575 |
ret = fd_load(f, &s->drives[0]);
|
576 |
if (ret == 0) |
577 |
ret = fd_load(f, &s->drives[1]);
|
578 |
|
579 |
return ret;
|
580 |
} |
581 |
|
582 |
static void fdctrl_external_reset(void *opaque) |
583 |
{ |
584 |
fdctrl_t *s = opaque; |
585 |
|
586 |
fdctrl_reset(s, 0);
|
587 |
} |
588 |
|
589 |
fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped, |
590 |
target_phys_addr_t io_base, |
591 |
BlockDriverState **fds) |
592 |
{ |
593 |
fdctrl_t *fdctrl; |
594 |
int io_mem;
|
595 |
int i;
|
596 |
|
597 |
FLOPPY_DPRINTF("init controller\n");
|
598 |
fdctrl = qemu_mallocz(sizeof(fdctrl_t));
|
599 |
if (!fdctrl)
|
600 |
return NULL; |
601 |
fdctrl->result_timer = qemu_new_timer(vm_clock, |
602 |
fdctrl_result_timer, fdctrl); |
603 |
|
604 |
fdctrl->version = 0x90; /* Intel 82078 controller */ |
605 |
fdctrl->irq = irq; |
606 |
fdctrl->dma_chann = dma_chann; |
607 |
fdctrl->io_base = io_base; |
608 |
fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */ |
609 |
fdctrl->sun4m = 0;
|
610 |
if (fdctrl->dma_chann != -1) { |
611 |
fdctrl->dma_en = 1;
|
612 |
DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl); |
613 |
} else {
|
614 |
fdctrl->dma_en = 0;
|
615 |
} |
616 |
for (i = 0; i < 2; i++) { |
617 |
fd_init(&fdctrl->drives[i], fds[i]); |
618 |
} |
619 |
fdctrl_reset(fdctrl, 0);
|
620 |
fdctrl->state = FD_CTRL_ACTIVE; |
621 |
if (mem_mapped) {
|
622 |
io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
|
623 |
fdctrl); |
624 |
cpu_register_physical_memory(io_base, 0x08, io_mem);
|
625 |
} else {
|
626 |
register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read, |
627 |
fdctrl); |
628 |
register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read, |
629 |
fdctrl); |
630 |
register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write, |
631 |
fdctrl); |
632 |
register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write, |
633 |
fdctrl); |
634 |
} |
635 |
register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl); |
636 |
qemu_register_reset(fdctrl_external_reset, fdctrl); |
637 |
for (i = 0; i < 2; i++) { |
638 |
fd_revalidate(&fdctrl->drives[i]); |
639 |
} |
640 |
|
641 |
return fdctrl;
|
642 |
} |
643 |
|
644 |
fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base, |
645 |
BlockDriverState **fds) |
646 |
{ |
647 |
fdctrl_t *fdctrl; |
648 |
|
649 |
fdctrl = fdctrl_init(irq, 0, 1, io_base, fds); |
650 |
fdctrl->sun4m = 1;
|
651 |
|
652 |
return fdctrl;
|
653 |
} |
654 |
|
655 |
/* XXX: may change if moved to bdrv */
|
656 |
int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num) |
657 |
{ |
658 |
return fdctrl->drives[drive_num].drive;
|
659 |
} |
660 |
|
661 |
/* Change IRQ state */
|
662 |
static void fdctrl_reset_irq (fdctrl_t *fdctrl) |
663 |
{ |
664 |
FLOPPY_DPRINTF("Reset interrupt\n");
|
665 |
qemu_set_irq(fdctrl->irq, 0);
|
666 |
fdctrl->state &= ~FD_CTRL_INTR; |
667 |
} |
668 |
|
669 |
static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status) |
670 |
{ |
671 |
// Sparc mutation
|
672 |
if (fdctrl->sun4m && !fdctrl->dma_en) {
|
673 |
fdctrl->state &= ~FD_CTRL_BUSY; |
674 |
fdctrl->int_status = status; |
675 |
return;
|
676 |
} |
677 |
if (~(fdctrl->state & FD_CTRL_INTR)) {
|
678 |
qemu_set_irq(fdctrl->irq, 1);
|
679 |
fdctrl->state |= FD_CTRL_INTR; |
680 |
} |
681 |
FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
|
682 |
fdctrl->int_status = status; |
683 |
} |
684 |
|
685 |
/* Reset controller */
|
686 |
static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq) |
687 |
{ |
688 |
int i;
|
689 |
|
690 |
FLOPPY_DPRINTF("reset controller\n");
|
691 |
fdctrl_reset_irq(fdctrl); |
692 |
/* Initialise controller */
|
693 |
fdctrl->cur_drv = 0;
|
694 |
/* FIFO state */
|
695 |
fdctrl->data_pos = 0;
|
696 |
fdctrl->data_len = 0;
|
697 |
fdctrl->data_state = FD_STATE_CMD; |
698 |
fdctrl->data_dir = FD_DIR_WRITE; |
699 |
for (i = 0; i < MAX_FD; i++) |
700 |
fd_reset(&fdctrl->drives[i]); |
701 |
fdctrl_reset_fifo(fdctrl); |
702 |
if (do_irq)
|
703 |
fdctrl_raise_irq(fdctrl, 0xc0);
|
704 |
} |
705 |
|
706 |
static inline fdrive_t *drv0 (fdctrl_t *fdctrl) |
707 |
{ |
708 |
return &fdctrl->drives[fdctrl->bootsel];
|
709 |
} |
710 |
|
711 |
static inline fdrive_t *drv1 (fdctrl_t *fdctrl) |
712 |
{ |
713 |
return &fdctrl->drives[1 - fdctrl->bootsel]; |
714 |
} |
715 |
|
716 |
static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
|
717 |
{ |
718 |
return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl); |
719 |
} |
720 |
|
721 |
/* Status B register : 0x01 (read-only) */
|
722 |
static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
|
723 |
{ |
724 |
FLOPPY_DPRINTF("status register: 0x00\n");
|
725 |
return 0; |
726 |
} |
727 |
|
728 |
/* Digital output register : 0x02 */
|
729 |
static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
|
730 |
{ |
731 |
uint32_t retval = 0;
|
732 |
|
733 |
/* Drive motors state indicators */
|
734 |
if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
|
735 |
retval |= 1 << 5; |
736 |
if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
|
737 |
retval |= 1 << 4; |
738 |
/* DMA enable */
|
739 |
retval |= fdctrl->dma_en << 3;
|
740 |
/* Reset indicator */
|
741 |
retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0; |
742 |
/* Selected drive */
|
743 |
retval |= fdctrl->cur_drv; |
744 |
FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
|
745 |
|
746 |
return retval;
|
747 |
} |
748 |
|
749 |
static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value) |
750 |
{ |
751 |
/* Reset mode */
|
752 |
if (fdctrl->state & FD_CTRL_RESET) {
|
753 |
if (!(value & 0x04)) { |
754 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
755 |
return;
|
756 |
} |
757 |
} |
758 |
FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
|
759 |
/* Drive motors state indicators */
|
760 |
if (value & 0x20) |
761 |
fd_start(drv1(fdctrl)); |
762 |
else
|
763 |
fd_stop(drv1(fdctrl)); |
764 |
if (value & 0x10) |
765 |
fd_start(drv0(fdctrl)); |
766 |
else
|
767 |
fd_stop(drv0(fdctrl)); |
768 |
/* DMA enable */
|
769 |
#if 0
|
770 |
if (fdctrl->dma_chann != -1)
|
771 |
fdctrl->dma_en = 1 - ((value >> 3) & 1);
|
772 |
#endif
|
773 |
/* Reset */
|
774 |
if (!(value & 0x04)) { |
775 |
if (!(fdctrl->state & FD_CTRL_RESET)) {
|
776 |
FLOPPY_DPRINTF("controller enter RESET state\n");
|
777 |
fdctrl->state |= FD_CTRL_RESET; |
778 |
} |
779 |
} else {
|
780 |
if (fdctrl->state & FD_CTRL_RESET) {
|
781 |
FLOPPY_DPRINTF("controller out of RESET state\n");
|
782 |
fdctrl_reset(fdctrl, 1);
|
783 |
fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP); |
784 |
} |
785 |
} |
786 |
/* Selected drive */
|
787 |
fdctrl->cur_drv = value & 1;
|
788 |
} |
789 |
|
790 |
/* Tape drive register : 0x03 */
|
791 |
static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
|
792 |
{ |
793 |
uint32_t retval = 0;
|
794 |
|
795 |
/* Disk boot selection indicator */
|
796 |
retval |= fdctrl->bootsel << 2;
|
797 |
/* Tape indicators: never allowed */
|
798 |
FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
|
799 |
|
800 |
return retval;
|
801 |
} |
802 |
|
803 |
static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value) |
804 |
{ |
805 |
/* Reset mode */
|
806 |
if (fdctrl->state & FD_CTRL_RESET) {
|
807 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
808 |
return;
|
809 |
} |
810 |
FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
|
811 |
/* Disk boot selection indicator */
|
812 |
fdctrl->bootsel = (value >> 2) & 1; |
813 |
/* Tape indicators: never allow */
|
814 |
} |
815 |
|
816 |
/* Main status register : 0x04 (read) */
|
817 |
static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
|
818 |
{ |
819 |
uint32_t retval = 0;
|
820 |
|
821 |
fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET); |
822 |
if (!(fdctrl->state & FD_CTRL_BUSY)) {
|
823 |
/* Data transfer allowed */
|
824 |
retval |= 0x80;
|
825 |
/* Data transfer direction indicator */
|
826 |
if (fdctrl->data_dir == FD_DIR_READ)
|
827 |
retval |= 0x40;
|
828 |
} |
829 |
/* Should handle 0x20 for SPECIFY command */
|
830 |
/* Command busy indicator */
|
831 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
|
832 |
FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) |
833 |
retval |= 0x10;
|
834 |
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
|
835 |
|
836 |
return retval;
|
837 |
} |
838 |
|
839 |
/* Data select rate register : 0x04 (write) */
|
840 |
static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value) |
841 |
{ |
842 |
/* Reset mode */
|
843 |
if (fdctrl->state & FD_CTRL_RESET) {
|
844 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
845 |
return;
|
846 |
} |
847 |
FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
|
848 |
/* Reset: autoclear */
|
849 |
if (value & 0x80) { |
850 |
fdctrl->state |= FD_CTRL_RESET; |
851 |
fdctrl_reset(fdctrl, 1);
|
852 |
fdctrl->state &= ~FD_CTRL_RESET; |
853 |
} |
854 |
if (value & 0x40) { |
855 |
fdctrl->state |= FD_CTRL_SLEEP; |
856 |
fdctrl_reset(fdctrl, 1);
|
857 |
} |
858 |
// fdctrl.precomp = (value >> 2) & 0x07;
|
859 |
} |
860 |
|
861 |
static int fdctrl_media_changed(fdrive_t *drv) |
862 |
{ |
863 |
int ret;
|
864 |
|
865 |
if (!drv->bs)
|
866 |
return 0; |
867 |
ret = bdrv_media_changed(drv->bs); |
868 |
if (ret) {
|
869 |
fd_revalidate(drv); |
870 |
} |
871 |
return ret;
|
872 |
} |
873 |
|
874 |
/* Digital input register : 0x07 (read-only) */
|
875 |
static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
|
876 |
{ |
877 |
uint32_t retval = 0;
|
878 |
|
879 |
if (fdctrl_media_changed(drv0(fdctrl)) ||
|
880 |
fdctrl_media_changed(drv1(fdctrl))) |
881 |
retval |= 0x80;
|
882 |
if (retval != 0) |
883 |
FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
|
884 |
|
885 |
return retval;
|
886 |
} |
887 |
|
888 |
/* FIFO state control */
|
889 |
static void fdctrl_reset_fifo (fdctrl_t *fdctrl) |
890 |
{ |
891 |
fdctrl->data_dir = FD_DIR_WRITE; |
892 |
fdctrl->data_pos = 0;
|
893 |
FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD); |
894 |
} |
895 |
|
896 |
/* Set FIFO status for the host to read */
|
897 |
static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq) |
898 |
{ |
899 |
fdctrl->data_dir = FD_DIR_READ; |
900 |
fdctrl->data_len = fifo_len; |
901 |
fdctrl->data_pos = 0;
|
902 |
FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS); |
903 |
if (do_irq)
|
904 |
fdctrl_raise_irq(fdctrl, 0x00);
|
905 |
} |
906 |
|
907 |
/* Set an error: unimplemented/unknown command */
|
908 |
static void fdctrl_unimplemented (fdctrl_t *fdctrl) |
909 |
{ |
910 |
#if 0
|
911 |
fdrive_t *cur_drv;
|
912 |
|
913 |
cur_drv = get_cur_drv(fdctrl);
|
914 |
fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
|
915 |
fdctrl->fifo[1] = 0x00;
|
916 |
fdctrl->fifo[2] = 0x00;
|
917 |
fdctrl_set_fifo(fdctrl, 3, 1);
|
918 |
#else
|
919 |
// fdctrl_reset_fifo(fdctrl);
|
920 |
fdctrl->fifo[0] = 0x80; |
921 |
fdctrl_set_fifo(fdctrl, 1, 0); |
922 |
#endif
|
923 |
} |
924 |
|
925 |
/* Callback for transfer end (stop or abort) */
|
926 |
static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0, |
927 |
uint8_t status1, uint8_t status2) |
928 |
{ |
929 |
fdrive_t *cur_drv; |
930 |
|
931 |
cur_drv = get_cur_drv(fdctrl); |
932 |
FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
|
933 |
status0, status1, status2, |
934 |
status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
|
935 |
fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv; |
936 |
fdctrl->fifo[1] = status1;
|
937 |
fdctrl->fifo[2] = status2;
|
938 |
fdctrl->fifo[3] = cur_drv->track;
|
939 |
fdctrl->fifo[4] = cur_drv->head;
|
940 |
fdctrl->fifo[5] = cur_drv->sect;
|
941 |
fdctrl->fifo[6] = FD_SECTOR_SC;
|
942 |
fdctrl->data_dir = FD_DIR_READ; |
943 |
if (fdctrl->state & FD_CTRL_BUSY) {
|
944 |
DMA_release_DREQ(fdctrl->dma_chann); |
945 |
fdctrl->state &= ~FD_CTRL_BUSY; |
946 |
} |
947 |
fdctrl_set_fifo(fdctrl, 7, 1); |
948 |
} |
949 |
|
950 |
/* Prepare a data transfer (either DMA or FIFO) */
|
951 |
static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction) |
952 |
{ |
953 |
fdrive_t *cur_drv; |
954 |
uint8_t kh, kt, ks; |
955 |
int did_seek;
|
956 |
|
957 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
958 |
cur_drv = get_cur_drv(fdctrl); |
959 |
kt = fdctrl->fifo[2];
|
960 |
kh = fdctrl->fifo[3];
|
961 |
ks = fdctrl->fifo[4];
|
962 |
FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
|
963 |
fdctrl->cur_drv, kh, kt, ks, |
964 |
_fd_sector(kh, kt, ks, cur_drv->last_sect)); |
965 |
did_seek = 0;
|
966 |
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) { |
967 |
case 2: |
968 |
/* sect too big */
|
969 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00); |
970 |
fdctrl->fifo[3] = kt;
|
971 |
fdctrl->fifo[4] = kh;
|
972 |
fdctrl->fifo[5] = ks;
|
973 |
return;
|
974 |
case 3: |
975 |
/* track too big */
|
976 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00); |
977 |
fdctrl->fifo[3] = kt;
|
978 |
fdctrl->fifo[4] = kh;
|
979 |
fdctrl->fifo[5] = ks;
|
980 |
return;
|
981 |
case 4: |
982 |
/* No seek enabled */
|
983 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00); |
984 |
fdctrl->fifo[3] = kt;
|
985 |
fdctrl->fifo[4] = kh;
|
986 |
fdctrl->fifo[5] = ks;
|
987 |
return;
|
988 |
case 1: |
989 |
did_seek = 1;
|
990 |
break;
|
991 |
default:
|
992 |
break;
|
993 |
} |
994 |
/* Set the FIFO state */
|
995 |
fdctrl->data_dir = direction; |
996 |
fdctrl->data_pos = 0;
|
997 |
FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
|
998 |
if (fdctrl->fifo[0] & 0x80) |
999 |
fdctrl->data_state |= FD_STATE_MULTI; |
1000 |
else
|
1001 |
fdctrl->data_state &= ~FD_STATE_MULTI; |
1002 |
if (did_seek)
|
1003 |
fdctrl->data_state |= FD_STATE_SEEK; |
1004 |
else
|
1005 |
fdctrl->data_state &= ~FD_STATE_SEEK; |
1006 |
if (fdctrl->fifo[5] == 00) { |
1007 |
fdctrl->data_len = fdctrl->fifo[8];
|
1008 |
} else {
|
1009 |
int tmp;
|
1010 |
fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]); |
1011 |
tmp = (cur_drv->last_sect - ks + 1);
|
1012 |
if (fdctrl->fifo[0] & 0x80) |
1013 |
tmp += cur_drv->last_sect; |
1014 |
fdctrl->data_len *= tmp; |
1015 |
} |
1016 |
fdctrl->eot = fdctrl->fifo[6];
|
1017 |
if (fdctrl->dma_en) {
|
1018 |
int dma_mode;
|
1019 |
/* DMA transfer are enabled. Check if DMA channel is well programmed */
|
1020 |
dma_mode = DMA_get_channel_mode(fdctrl->dma_chann); |
1021 |
dma_mode = (dma_mode >> 2) & 3; |
1022 |
FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
|
1023 |
dma_mode, direction, |
1024 |
(128 << fdctrl->fifo[5]) * |
1025 |
(cur_drv->last_sect - ks + 1), fdctrl->data_len);
|
1026 |
if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
|
1027 |
direction == FD_DIR_SCANH) && dma_mode == 0) ||
|
1028 |
(direction == FD_DIR_WRITE && dma_mode == 2) ||
|
1029 |
(direction == FD_DIR_READ && dma_mode == 1)) {
|
1030 |
/* No access is allowed until DMA transfer has completed */
|
1031 |
fdctrl->state |= FD_CTRL_BUSY; |
1032 |
/* Now, we just have to wait for the DMA controller to
|
1033 |
* recall us...
|
1034 |
*/
|
1035 |
DMA_hold_DREQ(fdctrl->dma_chann); |
1036 |
DMA_schedule(fdctrl->dma_chann); |
1037 |
return;
|
1038 |
} else {
|
1039 |
FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
|
1040 |
} |
1041 |
} |
1042 |
FLOPPY_DPRINTF("start non-DMA transfer\n");
|
1043 |
/* IO based transfer: calculate len */
|
1044 |
fdctrl_raise_irq(fdctrl, 0x00);
|
1045 |
|
1046 |
return;
|
1047 |
} |
1048 |
|
1049 |
/* Prepare a transfer of deleted data */
|
1050 |
static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction) |
1051 |
{ |
1052 |
/* We don't handle deleted data,
|
1053 |
* so we don't return *ANYTHING*
|
1054 |
*/
|
1055 |
fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00); |
1056 |
} |
1057 |
|
1058 |
/* handlers for DMA transfers */
|
1059 |
static int fdctrl_transfer_handler (void *opaque, int nchan, |
1060 |
int dma_pos, int dma_len) |
1061 |
{ |
1062 |
fdctrl_t *fdctrl; |
1063 |
fdrive_t *cur_drv; |
1064 |
int len, start_pos, rel_pos;
|
1065 |
uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; |
1066 |
|
1067 |
fdctrl = opaque; |
1068 |
if (!(fdctrl->state & FD_CTRL_BUSY)) {
|
1069 |
FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
|
1070 |
return 0; |
1071 |
} |
1072 |
cur_drv = get_cur_drv(fdctrl); |
1073 |
if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
|
1074 |
fdctrl->data_dir == FD_DIR_SCANH) |
1075 |
status2 = 0x04;
|
1076 |
if (dma_len > fdctrl->data_len)
|
1077 |
dma_len = fdctrl->data_len; |
1078 |
if (cur_drv->bs == NULL) { |
1079 |
if (fdctrl->data_dir == FD_DIR_WRITE)
|
1080 |
fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00); |
1081 |
else
|
1082 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00); |
1083 |
len = 0;
|
1084 |
goto transfer_error;
|
1085 |
} |
1086 |
rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; |
1087 |
for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
|
1088 |
len = dma_len - fdctrl->data_pos; |
1089 |
if (len + rel_pos > FD_SECTOR_LEN)
|
1090 |
len = FD_SECTOR_LEN - rel_pos; |
1091 |
FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
|
1092 |
"(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
|
1093 |
fdctrl->data_len, fdctrl->cur_drv, cur_drv->head, |
1094 |
cur_drv->track, cur_drv->sect, fd_sector(cur_drv), |
1095 |
fd_sector(cur_drv) * 512);
|
1096 |
if (fdctrl->data_dir != FD_DIR_WRITE ||
|
1097 |
len < FD_SECTOR_LEN || rel_pos != 0) {
|
1098 |
/* READ & SCAN commands and realign to a sector for WRITE */
|
1099 |
if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
|
1100 |
fdctrl->fifo, 1) < 0) { |
1101 |
FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
|
1102 |
fd_sector(cur_drv)); |
1103 |
/* Sure, image size is too small... */
|
1104 |
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
|
1105 |
} |
1106 |
} |
1107 |
switch (fdctrl->data_dir) {
|
1108 |
case FD_DIR_READ:
|
1109 |
/* READ commands */
|
1110 |
DMA_write_memory (nchan, fdctrl->fifo + rel_pos, |
1111 |
fdctrl->data_pos, len); |
1112 |
break;
|
1113 |
case FD_DIR_WRITE:
|
1114 |
/* WRITE commands */
|
1115 |
DMA_read_memory (nchan, fdctrl->fifo + rel_pos, |
1116 |
fdctrl->data_pos, len); |
1117 |
if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
|
1118 |
fdctrl->fifo, 1) < 0) { |
1119 |
FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
|
1120 |
fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00); |
1121 |
goto transfer_error;
|
1122 |
} |
1123 |
break;
|
1124 |
default:
|
1125 |
/* SCAN commands */
|
1126 |
{ |
1127 |
uint8_t tmpbuf[FD_SECTOR_LEN]; |
1128 |
int ret;
|
1129 |
DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len); |
1130 |
ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len); |
1131 |
if (ret == 0) { |
1132 |
status2 = 0x08;
|
1133 |
goto end_transfer;
|
1134 |
} |
1135 |
if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) || |
1136 |
(ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
|
1137 |
status2 = 0x00;
|
1138 |
goto end_transfer;
|
1139 |
} |
1140 |
} |
1141 |
break;
|
1142 |
} |
1143 |
fdctrl->data_pos += len; |
1144 |
rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; |
1145 |
if (rel_pos == 0) { |
1146 |
/* Seek to next sector */
|
1147 |
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
|
1148 |
cur_drv->head, cur_drv->track, cur_drv->sect, |
1149 |
fd_sector(cur_drv), |
1150 |
fdctrl->data_pos - len); |
1151 |
/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
|
1152 |
error in fact */
|
1153 |
if (cur_drv->sect >= cur_drv->last_sect ||
|
1154 |
cur_drv->sect == fdctrl->eot) { |
1155 |
cur_drv->sect = 1;
|
1156 |
if (FD_MULTI_TRACK(fdctrl->data_state)) {
|
1157 |
if (cur_drv->head == 0 && |
1158 |
(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
|
1159 |
cur_drv->head = 1;
|
1160 |
} else {
|
1161 |
cur_drv->head = 0;
|
1162 |
cur_drv->track++; |
1163 |
if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) |
1164 |
break;
|
1165 |
} |
1166 |
} else {
|
1167 |
cur_drv->track++; |
1168 |
break;
|
1169 |
} |
1170 |
FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
|
1171 |
cur_drv->head, cur_drv->track, |
1172 |
cur_drv->sect, fd_sector(cur_drv)); |
1173 |
} else {
|
1174 |
cur_drv->sect++; |
1175 |
} |
1176 |
} |
1177 |
} |
1178 |
end_transfer:
|
1179 |
len = fdctrl->data_pos - start_pos; |
1180 |
FLOPPY_DPRINTF("end transfer %d %d %d\n",
|
1181 |
fdctrl->data_pos, len, fdctrl->data_len); |
1182 |
if (fdctrl->data_dir == FD_DIR_SCANE ||
|
1183 |
fdctrl->data_dir == FD_DIR_SCANL || |
1184 |
fdctrl->data_dir == FD_DIR_SCANH) |
1185 |
status2 = 0x08;
|
1186 |
if (FD_DID_SEEK(fdctrl->data_state))
|
1187 |
status0 |= 0x20;
|
1188 |
fdctrl->data_len -= len; |
1189 |
// if (fdctrl->data_len == 0)
|
1190 |
fdctrl_stop_transfer(fdctrl, status0, status1, status2); |
1191 |
transfer_error:
|
1192 |
|
1193 |
return len;
|
1194 |
} |
1195 |
|
1196 |
/* Data register : 0x05 */
|
1197 |
static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
|
1198 |
{ |
1199 |
fdrive_t *cur_drv; |
1200 |
uint32_t retval = 0;
|
1201 |
int pos, len;
|
1202 |
|
1203 |
cur_drv = get_cur_drv(fdctrl); |
1204 |
fdctrl->state &= ~FD_CTRL_SLEEP; |
1205 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
|
1206 |
FLOPPY_ERROR("can't read data in CMD state\n");
|
1207 |
return 0; |
1208 |
} |
1209 |
pos = fdctrl->data_pos; |
1210 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
|
1211 |
pos %= FD_SECTOR_LEN; |
1212 |
if (pos == 0) { |
1213 |
len = fdctrl->data_len - fdctrl->data_pos; |
1214 |
if (len > FD_SECTOR_LEN)
|
1215 |
len = FD_SECTOR_LEN; |
1216 |
bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
|
1217 |
} |
1218 |
} |
1219 |
retval = fdctrl->fifo[pos]; |
1220 |
if (++fdctrl->data_pos == fdctrl->data_len) {
|
1221 |
fdctrl->data_pos = 0;
|
1222 |
/* Switch from transfer mode to status mode
|
1223 |
* then from status mode to command mode
|
1224 |
*/
|
1225 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
|
1226 |
fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00); |
1227 |
} else {
|
1228 |
fdctrl_reset_fifo(fdctrl); |
1229 |
fdctrl_reset_irq(fdctrl); |
1230 |
} |
1231 |
} |
1232 |
FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
|
1233 |
|
1234 |
return retval;
|
1235 |
} |
1236 |
|
1237 |
static void fdctrl_format_sector (fdctrl_t *fdctrl) |
1238 |
{ |
1239 |
fdrive_t *cur_drv; |
1240 |
uint8_t kh, kt, ks; |
1241 |
int did_seek;
|
1242 |
|
1243 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1244 |
cur_drv = get_cur_drv(fdctrl); |
1245 |
kt = fdctrl->fifo[6];
|
1246 |
kh = fdctrl->fifo[7];
|
1247 |
ks = fdctrl->fifo[8];
|
1248 |
FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
|
1249 |
fdctrl->cur_drv, kh, kt, ks, |
1250 |
_fd_sector(kh, kt, ks, cur_drv->last_sect)); |
1251 |
did_seek = 0;
|
1252 |
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) { |
1253 |
case 2: |
1254 |
/* sect too big */
|
1255 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00); |
1256 |
fdctrl->fifo[3] = kt;
|
1257 |
fdctrl->fifo[4] = kh;
|
1258 |
fdctrl->fifo[5] = ks;
|
1259 |
return;
|
1260 |
case 3: |
1261 |
/* track too big */
|
1262 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00); |
1263 |
fdctrl->fifo[3] = kt;
|
1264 |
fdctrl->fifo[4] = kh;
|
1265 |
fdctrl->fifo[5] = ks;
|
1266 |
return;
|
1267 |
case 4: |
1268 |
/* No seek enabled */
|
1269 |
fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00); |
1270 |
fdctrl->fifo[3] = kt;
|
1271 |
fdctrl->fifo[4] = kh;
|
1272 |
fdctrl->fifo[5] = ks;
|
1273 |
return;
|
1274 |
case 1: |
1275 |
did_seek = 1;
|
1276 |
fdctrl->data_state |= FD_STATE_SEEK; |
1277 |
break;
|
1278 |
default:
|
1279 |
break;
|
1280 |
} |
1281 |
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
|
1282 |
if (cur_drv->bs == NULL || |
1283 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { |
1284 |
FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
|
1285 |
fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00); |
1286 |
} else {
|
1287 |
if (cur_drv->sect == cur_drv->last_sect) {
|
1288 |
fdctrl->data_state &= ~FD_STATE_FORMAT; |
1289 |
/* Last sector done */
|
1290 |
if (FD_DID_SEEK(fdctrl->data_state))
|
1291 |
fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00); |
1292 |
else
|
1293 |
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
1294 |
} else {
|
1295 |
/* More to do */
|
1296 |
fdctrl->data_pos = 0;
|
1297 |
fdctrl->data_len = 4;
|
1298 |
} |
1299 |
} |
1300 |
} |
1301 |
|
1302 |
static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value) |
1303 |
{ |
1304 |
fdrive_t *cur_drv; |
1305 |
|
1306 |
cur_drv = get_cur_drv(fdctrl); |
1307 |
/* Reset mode */
|
1308 |
if (fdctrl->state & FD_CTRL_RESET) {
|
1309 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
1310 |
return;
|
1311 |
} |
1312 |
fdctrl->state &= ~FD_CTRL_SLEEP; |
1313 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
|
1314 |
FLOPPY_ERROR("can't write data in status mode\n");
|
1315 |
return;
|
1316 |
} |
1317 |
/* Is it write command time ? */
|
1318 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
|
1319 |
/* FIFO data write */
|
1320 |
fdctrl->fifo[fdctrl->data_pos++] = value; |
1321 |
if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) || |
1322 |
fdctrl->data_pos == fdctrl->data_len) { |
1323 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
|
1324 |
} |
1325 |
/* Switch from transfer mode to status mode
|
1326 |
* then from status mode to command mode
|
1327 |
*/
|
1328 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
|
1329 |
fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00); |
1330 |
return;
|
1331 |
} |
1332 |
if (fdctrl->data_pos == 0) { |
1333 |
/* Command */
|
1334 |
switch (value & 0x5F) { |
1335 |
case 0x46: |
1336 |
/* READ variants */
|
1337 |
FLOPPY_DPRINTF("READ command\n");
|
1338 |
/* 8 parameters cmd */
|
1339 |
fdctrl->data_len = 9;
|
1340 |
goto enqueue;
|
1341 |
case 0x4C: |
1342 |
/* READ_DELETED variants */
|
1343 |
FLOPPY_DPRINTF("READ_DELETED command\n");
|
1344 |
/* 8 parameters cmd */
|
1345 |
fdctrl->data_len = 9;
|
1346 |
goto enqueue;
|
1347 |
case 0x50: |
1348 |
/* SCAN_EQUAL variants */
|
1349 |
FLOPPY_DPRINTF("SCAN_EQUAL command\n");
|
1350 |
/* 8 parameters cmd */
|
1351 |
fdctrl->data_len = 9;
|
1352 |
goto enqueue;
|
1353 |
case 0x56: |
1354 |
/* VERIFY variants */
|
1355 |
FLOPPY_DPRINTF("VERIFY command\n");
|
1356 |
/* 8 parameters cmd */
|
1357 |
fdctrl->data_len = 9;
|
1358 |
goto enqueue;
|
1359 |
case 0x59: |
1360 |
/* SCAN_LOW_OR_EQUAL variants */
|
1361 |
FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
|
1362 |
/* 8 parameters cmd */
|
1363 |
fdctrl->data_len = 9;
|
1364 |
goto enqueue;
|
1365 |
case 0x5D: |
1366 |
/* SCAN_HIGH_OR_EQUAL variants */
|
1367 |
FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
|
1368 |
/* 8 parameters cmd */
|
1369 |
fdctrl->data_len = 9;
|
1370 |
goto enqueue;
|
1371 |
default:
|
1372 |
break;
|
1373 |
} |
1374 |
switch (value & 0x7F) { |
1375 |
case 0x45: |
1376 |
/* WRITE variants */
|
1377 |
FLOPPY_DPRINTF("WRITE command\n");
|
1378 |
/* 8 parameters cmd */
|
1379 |
fdctrl->data_len = 9;
|
1380 |
goto enqueue;
|
1381 |
case 0x49: |
1382 |
/* WRITE_DELETED variants */
|
1383 |
FLOPPY_DPRINTF("WRITE_DELETED command\n");
|
1384 |
/* 8 parameters cmd */
|
1385 |
fdctrl->data_len = 9;
|
1386 |
goto enqueue;
|
1387 |
default:
|
1388 |
break;
|
1389 |
} |
1390 |
switch (value) {
|
1391 |
case 0x03: |
1392 |
/* SPECIFY */
|
1393 |
FLOPPY_DPRINTF("SPECIFY command\n");
|
1394 |
/* 1 parameter cmd */
|
1395 |
fdctrl->data_len = 3;
|
1396 |
goto enqueue;
|
1397 |
case 0x04: |
1398 |
/* SENSE_DRIVE_STATUS */
|
1399 |
FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
|
1400 |
/* 1 parameter cmd */
|
1401 |
fdctrl->data_len = 2;
|
1402 |
goto enqueue;
|
1403 |
case 0x07: |
1404 |
/* RECALIBRATE */
|
1405 |
FLOPPY_DPRINTF("RECALIBRATE command\n");
|
1406 |
/* 1 parameter cmd */
|
1407 |
fdctrl->data_len = 2;
|
1408 |
goto enqueue;
|
1409 |
case 0x08: |
1410 |
/* SENSE_INTERRUPT_STATUS */
|
1411 |
FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
|
1412 |
fdctrl->int_status); |
1413 |
/* No parameters cmd: returns status if no interrupt */
|
1414 |
#if 0
|
1415 |
fdctrl->fifo[0] =
|
1416 |
fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
|
1417 |
#else
|
1418 |
/* XXX: int_status handling is broken for read/write
|
1419 |
commands, so we do this hack. It should be suppressed
|
1420 |
ASAP */
|
1421 |
fdctrl->fifo[0] =
|
1422 |
0x20 | (cur_drv->head << 2) | fdctrl->cur_drv; |
1423 |
#endif
|
1424 |
fdctrl->fifo[1] = cur_drv->track;
|
1425 |
fdctrl_set_fifo(fdctrl, 2, 0); |
1426 |
fdctrl_reset_irq(fdctrl); |
1427 |
fdctrl->int_status = 0xC0;
|
1428 |
return;
|
1429 |
case 0x0E: |
1430 |
/* DUMPREG */
|
1431 |
FLOPPY_DPRINTF("DUMPREG command\n");
|
1432 |
/* Drives position */
|
1433 |
fdctrl->fifo[0] = drv0(fdctrl)->track;
|
1434 |
fdctrl->fifo[1] = drv1(fdctrl)->track;
|
1435 |
fdctrl->fifo[2] = 0; |
1436 |
fdctrl->fifo[3] = 0; |
1437 |
/* timers */
|
1438 |
fdctrl->fifo[4] = fdctrl->timer0;
|
1439 |
fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en; |
1440 |
fdctrl->fifo[6] = cur_drv->last_sect;
|
1441 |
fdctrl->fifo[7] = (fdctrl->lock << 7) | |
1442 |
(cur_drv->perpendicular << 2);
|
1443 |
fdctrl->fifo[8] = fdctrl->config;
|
1444 |
fdctrl->fifo[9] = fdctrl->precomp_trk;
|
1445 |
fdctrl_set_fifo(fdctrl, 10, 0); |
1446 |
return;
|
1447 |
case 0x0F: |
1448 |
/* SEEK */
|
1449 |
FLOPPY_DPRINTF("SEEK command\n");
|
1450 |
/* 2 parameters cmd */
|
1451 |
fdctrl->data_len = 3;
|
1452 |
goto enqueue;
|
1453 |
case 0x10: |
1454 |
/* VERSION */
|
1455 |
FLOPPY_DPRINTF("VERSION command\n");
|
1456 |
/* No parameters cmd */
|
1457 |
/* Controller's version */
|
1458 |
fdctrl->fifo[0] = fdctrl->version;
|
1459 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1460 |
return;
|
1461 |
case 0x12: |
1462 |
/* PERPENDICULAR_MODE */
|
1463 |
FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
|
1464 |
/* 1 parameter cmd */
|
1465 |
fdctrl->data_len = 2;
|
1466 |
goto enqueue;
|
1467 |
case 0x13: |
1468 |
/* CONFIGURE */
|
1469 |
FLOPPY_DPRINTF("CONFIGURE command\n");
|
1470 |
/* 3 parameters cmd */
|
1471 |
fdctrl->data_len = 4;
|
1472 |
goto enqueue;
|
1473 |
case 0x14: |
1474 |
/* UNLOCK */
|
1475 |
FLOPPY_DPRINTF("UNLOCK command\n");
|
1476 |
/* No parameters cmd */
|
1477 |
fdctrl->lock = 0;
|
1478 |
fdctrl->fifo[0] = 0; |
1479 |
fdctrl_set_fifo(fdctrl, 1, 0); |
1480 |
return;
|
1481 |
case 0x17: |
1482 |
/* POWERDOWN_MODE */
|
1483 |
FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
|
1484 |
/* 2 parameters cmd */
|
1485 |
fdctrl->data_len = 3;
|
1486 |
goto enqueue;
|
1487 |
case 0x18: |
1488 |
/* PART_ID */
|
1489 |
FLOPPY_DPRINTF("PART_ID command\n");
|
1490 |
/* No parameters cmd */
|
1491 |
fdctrl->fifo[0] = 0x41; /* Stepping 1 */ |
1492 |
fdctrl_set_fifo(fdctrl, 1, 0); |
1493 |
return;
|
1494 |
case 0x2C: |
1495 |
/* SAVE */
|
1496 |
FLOPPY_DPRINTF("SAVE command\n");
|
1497 |
/* No parameters cmd */
|
1498 |
fdctrl->fifo[0] = 0; |
1499 |
fdctrl->fifo[1] = 0; |
1500 |
/* Drives position */
|
1501 |
fdctrl->fifo[2] = drv0(fdctrl)->track;
|
1502 |
fdctrl->fifo[3] = drv1(fdctrl)->track;
|
1503 |
fdctrl->fifo[4] = 0; |
1504 |
fdctrl->fifo[5] = 0; |
1505 |
/* timers */
|
1506 |
fdctrl->fifo[6] = fdctrl->timer0;
|
1507 |
fdctrl->fifo[7] = fdctrl->timer1;
|
1508 |
fdctrl->fifo[8] = cur_drv->last_sect;
|
1509 |
fdctrl->fifo[9] = (fdctrl->lock << 7) | |
1510 |
(cur_drv->perpendicular << 2);
|
1511 |
fdctrl->fifo[10] = fdctrl->config;
|
1512 |
fdctrl->fifo[11] = fdctrl->precomp_trk;
|
1513 |
fdctrl->fifo[12] = fdctrl->pwrd;
|
1514 |
fdctrl->fifo[13] = 0; |
1515 |
fdctrl->fifo[14] = 0; |
1516 |
fdctrl_set_fifo(fdctrl, 15, 1); |
1517 |
return;
|
1518 |
case 0x33: |
1519 |
/* OPTION */
|
1520 |
FLOPPY_DPRINTF("OPTION command\n");
|
1521 |
/* 1 parameter cmd */
|
1522 |
fdctrl->data_len = 2;
|
1523 |
goto enqueue;
|
1524 |
case 0x42: |
1525 |
/* READ_TRACK */
|
1526 |
FLOPPY_DPRINTF("READ_TRACK command\n");
|
1527 |
/* 8 parameters cmd */
|
1528 |
fdctrl->data_len = 9;
|
1529 |
goto enqueue;
|
1530 |
case 0x4A: |
1531 |
/* READ_ID */
|
1532 |
FLOPPY_DPRINTF("READ_ID command\n");
|
1533 |
/* 1 parameter cmd */
|
1534 |
fdctrl->data_len = 2;
|
1535 |
goto enqueue;
|
1536 |
case 0x4C: |
1537 |
/* RESTORE */
|
1538 |
FLOPPY_DPRINTF("RESTORE command\n");
|
1539 |
/* 17 parameters cmd */
|
1540 |
fdctrl->data_len = 18;
|
1541 |
goto enqueue;
|
1542 |
case 0x4D: |
1543 |
/* FORMAT_TRACK */
|
1544 |
FLOPPY_DPRINTF("FORMAT_TRACK command\n");
|
1545 |
/* 5 parameters cmd */
|
1546 |
fdctrl->data_len = 6;
|
1547 |
goto enqueue;
|
1548 |
case 0x8E: |
1549 |
/* DRIVE_SPECIFICATION_COMMAND */
|
1550 |
FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
|
1551 |
/* 5 parameters cmd */
|
1552 |
fdctrl->data_len = 6;
|
1553 |
goto enqueue;
|
1554 |
case 0x8F: |
1555 |
/* RELATIVE_SEEK_OUT */
|
1556 |
FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
|
1557 |
/* 2 parameters cmd */
|
1558 |
fdctrl->data_len = 3;
|
1559 |
goto enqueue;
|
1560 |
case 0x94: |
1561 |
/* LOCK */
|
1562 |
FLOPPY_DPRINTF("LOCK command\n");
|
1563 |
/* No parameters cmd */
|
1564 |
fdctrl->lock = 1;
|
1565 |
fdctrl->fifo[0] = 0x10; |
1566 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1567 |
return;
|
1568 |
case 0xCD: |
1569 |
/* FORMAT_AND_WRITE */
|
1570 |
FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
|
1571 |
/* 10 parameters cmd */
|
1572 |
fdctrl->data_len = 11;
|
1573 |
goto enqueue;
|
1574 |
case 0xCF: |
1575 |
/* RELATIVE_SEEK_IN */
|
1576 |
FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
|
1577 |
/* 2 parameters cmd */
|
1578 |
fdctrl->data_len = 3;
|
1579 |
goto enqueue;
|
1580 |
default:
|
1581 |
/* Unknown command */
|
1582 |
FLOPPY_ERROR("unknown command: 0x%02x\n", value);
|
1583 |
fdctrl_unimplemented(fdctrl); |
1584 |
return;
|
1585 |
} |
1586 |
} |
1587 |
enqueue:
|
1588 |
FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
|
1589 |
fdctrl->fifo[fdctrl->data_pos] = value; |
1590 |
if (++fdctrl->data_pos == fdctrl->data_len) {
|
1591 |
/* We now have all parameters
|
1592 |
* and will be able to treat the command
|
1593 |
*/
|
1594 |
if (fdctrl->data_state & FD_STATE_FORMAT) {
|
1595 |
fdctrl_format_sector(fdctrl); |
1596 |
return;
|
1597 |
} |
1598 |
switch (fdctrl->fifo[0] & 0x1F) { |
1599 |
case 0x06: |
1600 |
{ |
1601 |
/* READ variants */
|
1602 |
FLOPPY_DPRINTF("treat READ command\n");
|
1603 |
fdctrl_start_transfer(fdctrl, FD_DIR_READ); |
1604 |
return;
|
1605 |
} |
1606 |
case 0x0C: |
1607 |
/* READ_DELETED variants */
|
1608 |
// FLOPPY_DPRINTF("treat READ_DELETED command\n");
|
1609 |
FLOPPY_ERROR("treat READ_DELETED command\n");
|
1610 |
fdctrl_start_transfer_del(fdctrl, FD_DIR_READ); |
1611 |
return;
|
1612 |
case 0x16: |
1613 |
/* VERIFY variants */
|
1614 |
// FLOPPY_DPRINTF("treat VERIFY command\n");
|
1615 |
FLOPPY_ERROR("treat VERIFY command\n");
|
1616 |
fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00); |
1617 |
return;
|
1618 |
case 0x10: |
1619 |
/* SCAN_EQUAL variants */
|
1620 |
// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
|
1621 |
FLOPPY_ERROR("treat SCAN_EQUAL command\n");
|
1622 |
fdctrl_start_transfer(fdctrl, FD_DIR_SCANE); |
1623 |
return;
|
1624 |
case 0x19: |
1625 |
/* SCAN_LOW_OR_EQUAL variants */
|
1626 |
// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
|
1627 |
FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
|
1628 |
fdctrl_start_transfer(fdctrl, FD_DIR_SCANL); |
1629 |
return;
|
1630 |
case 0x1D: |
1631 |
/* SCAN_HIGH_OR_EQUAL variants */
|
1632 |
// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
|
1633 |
FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
|
1634 |
fdctrl_start_transfer(fdctrl, FD_DIR_SCANH); |
1635 |
return;
|
1636 |
default:
|
1637 |
break;
|
1638 |
} |
1639 |
switch (fdctrl->fifo[0] & 0x3F) { |
1640 |
case 0x05: |
1641 |
/* WRITE variants */
|
1642 |
FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]); |
1643 |
fdctrl_start_transfer(fdctrl, FD_DIR_WRITE); |
1644 |
return;
|
1645 |
case 0x09: |
1646 |
/* WRITE_DELETED variants */
|
1647 |
// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
|
1648 |
FLOPPY_ERROR("treat WRITE_DELETED command\n");
|
1649 |
fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE); |
1650 |
return;
|
1651 |
default:
|
1652 |
break;
|
1653 |
} |
1654 |
switch (fdctrl->fifo[0]) { |
1655 |
case 0x03: |
1656 |
/* SPECIFY */
|
1657 |
FLOPPY_DPRINTF("treat SPECIFY command\n");
|
1658 |
fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; |
1659 |
fdctrl->timer1 = fdctrl->fifo[2] >> 1; |
1660 |
fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ; |
1661 |
/* No result back */
|
1662 |
fdctrl_reset_fifo(fdctrl); |
1663 |
break;
|
1664 |
case 0x04: |
1665 |
/* SENSE_DRIVE_STATUS */
|
1666 |
FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
|
1667 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1668 |
cur_drv = get_cur_drv(fdctrl); |
1669 |
cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; |
1670 |
/* 1 Byte status back */
|
1671 |
fdctrl->fifo[0] = (cur_drv->ro << 6) | |
1672 |
(cur_drv->track == 0 ? 0x10 : 0x00) | |
1673 |
(cur_drv->head << 2) |
|
1674 |
fdctrl->cur_drv | |
1675 |
0x28;
|
1676 |
fdctrl_set_fifo(fdctrl, 1, 0); |
1677 |
break;
|
1678 |
case 0x07: |
1679 |
/* RECALIBRATE */
|
1680 |
FLOPPY_DPRINTF("treat RECALIBRATE command\n");
|
1681 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1682 |
cur_drv = get_cur_drv(fdctrl); |
1683 |
fd_recalibrate(cur_drv); |
1684 |
fdctrl_reset_fifo(fdctrl); |
1685 |
/* Raise Interrupt */
|
1686 |
fdctrl_raise_irq(fdctrl, 0x20);
|
1687 |
break;
|
1688 |
case 0x0F: |
1689 |
/* SEEK */
|
1690 |
FLOPPY_DPRINTF("treat SEEK command\n");
|
1691 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1692 |
cur_drv = get_cur_drv(fdctrl); |
1693 |
fd_start(cur_drv); |
1694 |
if (fdctrl->fifo[2] <= cur_drv->track) |
1695 |
cur_drv->dir = 1;
|
1696 |
else
|
1697 |
cur_drv->dir = 0;
|
1698 |
fdctrl_reset_fifo(fdctrl); |
1699 |
if (fdctrl->fifo[2] > cur_drv->max_track) { |
1700 |
fdctrl_raise_irq(fdctrl, 0x60);
|
1701 |
} else {
|
1702 |
cur_drv->track = fdctrl->fifo[2];
|
1703 |
/* Raise Interrupt */
|
1704 |
fdctrl_raise_irq(fdctrl, 0x20);
|
1705 |
} |
1706 |
break;
|
1707 |
case 0x12: |
1708 |
/* PERPENDICULAR_MODE */
|
1709 |
FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
|
1710 |
if (fdctrl->fifo[1] & 0x80) |
1711 |
cur_drv->perpendicular = fdctrl->fifo[1] & 0x7; |
1712 |
/* No result back */
|
1713 |
fdctrl_reset_fifo(fdctrl); |
1714 |
break;
|
1715 |
case 0x13: |
1716 |
/* CONFIGURE */
|
1717 |
FLOPPY_DPRINTF("treat CONFIGURE command\n");
|
1718 |
fdctrl->config = fdctrl->fifo[2];
|
1719 |
fdctrl->precomp_trk = fdctrl->fifo[3];
|
1720 |
/* No result back */
|
1721 |
fdctrl_reset_fifo(fdctrl); |
1722 |
break;
|
1723 |
case 0x17: |
1724 |
/* POWERDOWN_MODE */
|
1725 |
FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
|
1726 |
fdctrl->pwrd = fdctrl->fifo[1];
|
1727 |
fdctrl->fifo[0] = fdctrl->fifo[1]; |
1728 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1729 |
break;
|
1730 |
case 0x33: |
1731 |
/* OPTION */
|
1732 |
FLOPPY_DPRINTF("treat OPTION command\n");
|
1733 |
/* No result back */
|
1734 |
fdctrl_reset_fifo(fdctrl); |
1735 |
break;
|
1736 |
case 0x42: |
1737 |
/* READ_TRACK */
|
1738 |
// FLOPPY_DPRINTF("treat READ_TRACK command\n");
|
1739 |
FLOPPY_ERROR("treat READ_TRACK command\n");
|
1740 |
fdctrl_start_transfer(fdctrl, FD_DIR_READ); |
1741 |
break;
|
1742 |
case 0x4A: |
1743 |
/* READ_ID */
|
1744 |
FLOPPY_DPRINTF("treat READ_ID command\n");
|
1745 |
/* XXX: should set main status register to busy */
|
1746 |
cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; |
1747 |
qemu_mod_timer(fdctrl->result_timer, |
1748 |
qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
|
1749 |
break;
|
1750 |
case 0x4C: |
1751 |
/* RESTORE */
|
1752 |
FLOPPY_DPRINTF("treat RESTORE command\n");
|
1753 |
/* Drives position */
|
1754 |
drv0(fdctrl)->track = fdctrl->fifo[3];
|
1755 |
drv1(fdctrl)->track = fdctrl->fifo[4];
|
1756 |
/* timers */
|
1757 |
fdctrl->timer0 = fdctrl->fifo[7];
|
1758 |
fdctrl->timer1 = fdctrl->fifo[8];
|
1759 |
cur_drv->last_sect = fdctrl->fifo[9];
|
1760 |
fdctrl->lock = fdctrl->fifo[10] >> 7; |
1761 |
cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF; |
1762 |
fdctrl->config = fdctrl->fifo[11];
|
1763 |
fdctrl->precomp_trk = fdctrl->fifo[12];
|
1764 |
fdctrl->pwrd = fdctrl->fifo[13];
|
1765 |
fdctrl_reset_fifo(fdctrl); |
1766 |
break;
|
1767 |
case 0x4D: |
1768 |
/* FORMAT_TRACK */
|
1769 |
FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
|
1770 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1771 |
cur_drv = get_cur_drv(fdctrl); |
1772 |
fdctrl->data_state |= FD_STATE_FORMAT; |
1773 |
if (fdctrl->fifo[0] & 0x80) |
1774 |
fdctrl->data_state |= FD_STATE_MULTI; |
1775 |
else
|
1776 |
fdctrl->data_state &= ~FD_STATE_MULTI; |
1777 |
fdctrl->data_state &= ~FD_STATE_SEEK; |
1778 |
cur_drv->bps = |
1779 |
fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2]; |
1780 |
#if 0
|
1781 |
cur_drv->last_sect =
|
1782 |
cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
|
1783 |
fdctrl->fifo[3] / 2;
|
1784 |
#else
|
1785 |
cur_drv->last_sect = fdctrl->fifo[3];
|
1786 |
#endif
|
1787 |
/* TODO: implement format using DMA expected by the Bochs BIOS
|
1788 |
* and Linux fdformat (read 3 bytes per sector via DMA and fill
|
1789 |
* the sector with the specified fill byte
|
1790 |
*/
|
1791 |
fdctrl->data_state &= ~FD_STATE_FORMAT; |
1792 |
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
1793 |
break;
|
1794 |
case 0x8E: |
1795 |
/* DRIVE_SPECIFICATION_COMMAND */
|
1796 |
FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
|
1797 |
if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) { |
1798 |
/* Command parameters done */
|
1799 |
if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) { |
1800 |
fdctrl->fifo[0] = fdctrl->fifo[1]; |
1801 |
fdctrl->fifo[2] = 0; |
1802 |
fdctrl->fifo[3] = 0; |
1803 |
fdctrl_set_fifo(fdctrl, 4, 1); |
1804 |
} else {
|
1805 |
fdctrl_reset_fifo(fdctrl); |
1806 |
} |
1807 |
} else if (fdctrl->data_len > 7) { |
1808 |
/* ERROR */
|
1809 |
fdctrl->fifo[0] = 0x80 | |
1810 |
(cur_drv->head << 2) | fdctrl->cur_drv;
|
1811 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1812 |
} |
1813 |
break;
|
1814 |
case 0x8F: |
1815 |
/* RELATIVE_SEEK_OUT */
|
1816 |
FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
|
1817 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1818 |
cur_drv = get_cur_drv(fdctrl); |
1819 |
fd_start(cur_drv); |
1820 |
cur_drv->dir = 0;
|
1821 |
if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) { |
1822 |
cur_drv->track = cur_drv->max_track - 1;
|
1823 |
} else {
|
1824 |
cur_drv->track += fdctrl->fifo[2];
|
1825 |
} |
1826 |
fdctrl_reset_fifo(fdctrl); |
1827 |
fdctrl_raise_irq(fdctrl, 0x20);
|
1828 |
break;
|
1829 |
case 0xCD: |
1830 |
/* FORMAT_AND_WRITE */
|
1831 |
// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
|
1832 |
FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
|
1833 |
fdctrl_unimplemented(fdctrl); |
1834 |
break;
|
1835 |
case 0xCF: |
1836 |
/* RELATIVE_SEEK_IN */
|
1837 |
FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
|
1838 |
fdctrl->cur_drv = fdctrl->fifo[1] & 1; |
1839 |
cur_drv = get_cur_drv(fdctrl); |
1840 |
fd_start(cur_drv); |
1841 |
cur_drv->dir = 1;
|
1842 |
if (fdctrl->fifo[2] > cur_drv->track) { |
1843 |
cur_drv->track = 0;
|
1844 |
} else {
|
1845 |
cur_drv->track -= fdctrl->fifo[2];
|
1846 |
} |
1847 |
fdctrl_reset_fifo(fdctrl); |
1848 |
/* Raise Interrupt */
|
1849 |
fdctrl_raise_irq(fdctrl, 0x20);
|
1850 |
break;
|
1851 |
} |
1852 |
} |
1853 |
} |
1854 |
|
1855 |
static void fdctrl_result_timer(void *opaque) |
1856 |
{ |
1857 |
fdctrl_t *fdctrl = opaque; |
1858 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1859 |
|
1860 |
/* Pretend we are spinning.
|
1861 |
* This is needed for Coherent, which uses READ ID to check for
|
1862 |
* sector interleaving.
|
1863 |
*/
|
1864 |
if (cur_drv->last_sect != 0) { |
1865 |
cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
|
1866 |
} |
1867 |
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
1868 |
} |