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1.1 root 1: /*
2: * QEMU Floppy disk emulator (Intel 82078)
3: *
4: * Copyright (c) 2003 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 "vl.h"
29:
30: /********************************************************/
31: /* debug Floppy devices */
32: //#define DEBUG_FLOPPY
33:
34: #ifdef DEBUG_FLOPPY
35: #define FLOPPY_DPRINTF(fmt, args...) \
36: do { printf("FLOPPY: " fmt , ##args); } while (0)
37: #else
38: #define FLOPPY_DPRINTF(fmt, args...)
39: #endif
40:
41: #define FLOPPY_ERROR(fmt, args...) \
42: do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
43:
44: /********************************************************/
45: /* Floppy drive emulation */
46:
47: /* Will always be a fixed parameter for us */
48: #define FD_SECTOR_LEN 512
49: #define FD_SECTOR_SC 2 /* Sector size code */
50:
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 */
58: } fdisk_type_t;
59:
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 */
65: } fdrive_type_t;
66:
67: typedef enum fdrive_flags_t {
68: FDRIVE_MOTOR_ON = 0x01, /* motor on/off */
69: FDRIVE_REVALIDATE = 0x02, /* Revalidated */
70: } fdrive_flags_t;
71:
72: typedef enum fdisk_flags_t {
73: FDISK_DBL_SIDES = 0x01,
74: } fdisk_flags_t;
75:
76: typedef struct fdrive_t {
77: BlockDriverState *bs;
78: /* Drive status */
79: fdrive_type_t drive;
80: fdrive_flags_t drflags;
81: uint8_t perpendicular; /* 2.88 MB access mode */
82: /* Position */
83: uint8_t head;
84: uint8_t track;
85: uint8_t sect;
86: /* Last operation status */
87: uint8_t dir; /* Direction */
88: uint8_t rw; /* Read/write */
89: /* Media */
90: fdisk_flags_t flags;
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 */
95: } fdrive_t;
96:
97: static void fd_init (fdrive_t *drv, BlockDriverState *bs)
98: {
99: /* Drive */
100: drv->bs = bs;
101: drv->drive = FDRIVE_DRV_NONE;
102: drv->drflags = 0;
103: drv->perpendicular = 0;
104: /* Disk */
105: drv->last_sect = 0;
106: drv->max_track = 0;
107: }
108:
109: static int _fd_sector (uint8_t head, uint8_t track,
110: uint8_t sect, uint8_t last_sect)
111: {
112: return (((track * 2) + head) * last_sect) + sect - 1;
113: }
114:
115: /* Returns current position, in sectors, for given drive */
116: static int fd_sector (fdrive_t *drv)
117: {
118: return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
119: }
120:
121: static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
122: int enable_seek)
123: {
124: uint32_t sector;
125: int ret;
126:
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);
133: return 2;
134: }
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);
140: return 3;
141: }
142: sector = _fd_sector(head, track, sect, drv->last_sect);
143: ret = 0;
144: if (sector != fd_sector(drv)) {
145: #if 0
146: if (!enable_seek) {
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);
149: return 4;
150: }
151: #endif
152: drv->head = head;
153: if (drv->track != track)
154: ret = 1;
155: drv->track = track;
156: drv->sect = sect;
157: }
158:
159: return ret;
160: }
161:
162: /* Set drive back to track 0 */
163: static void fd_recalibrate (fdrive_t *drv)
164: {
165: FLOPPY_DPRINTF("recalibrate\n");
166: drv->head = 0;
167: drv->track = 0;
168: drv->sect = 1;
169: drv->dir = 1;
170: drv->rw = 0;
171: }
172:
173: /* Recognize floppy formats */
174: typedef struct fd_format_t {
175: fdrive_type_t drive;
176: fdisk_type_t disk;
177: uint8_t last_sect;
178: uint8_t max_track;
179: uint8_t max_head;
180: const unsigned char *str;
181: } fd_format_t;
182:
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", },
226: /* end */
227: { FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, },
228: };
229:
230: /* Revalidate a disk drive after a disk change */
231: static void fd_revalidate (fdrive_t *drv)
232: {
233: fd_format_t *parse;
234: int64_t nb_sectors, size;
235: int i, first_match, match;
236: int nb_heads, max_track, last_sect, ro;
237:
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);
246: } else {
247: bdrv_get_geometry(drv->bs, &nb_sectors);
248: match = -1;
249: first_match = -1;
250: for (i = 0;; i++) {
251: parse = &fd_formats[i];
252: if (parse->drive == FDRIVE_DRV_NONE)
253: break;
254: if (drv->drive == parse->drive ||
255: drv->drive == FDRIVE_DRV_NONE) {
256: size = (parse->max_head + 1) * parse->max_track *
257: parse->last_sect;
258: if (nb_sectors == size) {
259: match = i;
260: break;
261: }
262: if (first_match == -1)
263: first_match = i;
264: }
265: }
266: if (match == -1) {
267: if (first_match == -1)
268: match = 1;
269: else
270: match = first_match;
271: parse = &fd_formats[match];
272: }
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");
279: }
280: if (nb_heads == 1) {
281: drv->flags &= ~FDISK_DBL_SIDES;
282: } else {
283: drv->flags |= FDISK_DBL_SIDES;
284: }
285: drv->max_track = max_track;
286: drv->last_sect = last_sect;
287: drv->ro = ro;
288: } else {
289: FLOPPY_DPRINTF("No disk in drive\n");
290: drv->last_sect = 0;
291: drv->max_track = 0;
292: drv->flags &= ~FDISK_DBL_SIDES;
293: }
294: drv->drflags |= FDRIVE_REVALIDATE;
295: }
296:
297: /* Motor control */
298: static void fd_start (fdrive_t *drv)
299: {
300: drv->drflags |= FDRIVE_MOTOR_ON;
301: }
302:
303: static void fd_stop (fdrive_t *drv)
304: {
305: drv->drflags &= ~FDRIVE_MOTOR_ON;
306: }
307:
308: /* Re-initialise a drives (motor off, repositioned) */
309: static void fd_reset (fdrive_t *drv)
310: {
311: fd_stop(drv);
312: fd_recalibrate(drv);
313: }
314:
315: /********************************************************/
316: /* Intel 82078 floppy disk controller emulation */
317:
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);
324:
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);
335:
336: enum {
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 */
341: FD_CTRL_INTR = 0x10,
342: };
343:
344: enum {
345: FD_DIR_WRITE = 0,
346: FD_DIR_READ = 1,
347: FD_DIR_SCANE = 2,
348: FD_DIR_SCANL = 3,
349: FD_DIR_SCANH = 4,
350: };
351:
352: enum {
353: FD_STATE_CMD = 0x00,
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,
360: };
361:
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)
368:
369: struct fdctrl_t {
370: fdctrl_t *fdctrl;
371: /* Controller's identification */
372: uint8_t version;
373: /* HW */
374: int irq_lvl;
375: int dma_chann;
376: uint32_t io_base;
377: /* Controller state */
378: QEMUTimer *result_timer;
379: uint8_t state;
380: uint8_t dma_en;
381: uint8_t cur_drv;
382: uint8_t bootsel;
383: /* Command FIFO */
384: uint8_t fifo[FD_SECTOR_LEN];
385: uint32_t data_pos;
386: uint32_t data_len;
387: uint8_t data_state;
388: uint8_t data_dir;
389: uint8_t int_status;
390: uint8_t eot; /* last wanted sector */
391: /* States kept only to be returned back */
392: /* Timers state */
393: uint8_t timer0;
394: uint8_t timer1;
395: /* precompensation */
396: uint8_t precomp_trk;
397: uint8_t config;
398: uint8_t lock;
399: /* Power down config (also with status regB access mode */
400: uint8_t pwrd;
401: /* Floppy drives */
402: fdrive_t drives[2];
403: };
404:
405: static uint32_t fdctrl_read (void *opaque, uint32_t reg)
406: {
407: fdctrl_t *fdctrl = opaque;
408: uint32_t retval;
409:
410: switch (reg & 0x07) {
411: #ifdef TARGET_SPARC
412: case 0x00:
413: // Identify to Linux as S82078B
414: retval = fdctrl_read_statusB(fdctrl);
415: break;
416: #endif
417: case 0x01:
418: retval = fdctrl_read_statusB(fdctrl);
419: break;
420: case 0x02:
421: retval = fdctrl_read_dor(fdctrl);
422: break;
423: case 0x03:
424: retval = fdctrl_read_tape(fdctrl);
425: break;
426: case 0x04:
427: retval = fdctrl_read_main_status(fdctrl);
428: break;
429: case 0x05:
430: retval = fdctrl_read_data(fdctrl);
431: break;
432: case 0x07:
433: retval = fdctrl_read_dir(fdctrl);
434: break;
435: default:
436: retval = (uint32_t)(-1);
437: break;
438: }
439: FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
440:
441: return retval;
442: }
443:
444: static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
445: {
446: fdctrl_t *fdctrl = opaque;
447:
448: FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
449:
450: switch (reg & 0x07) {
451: case 0x02:
452: fdctrl_write_dor(fdctrl, value);
453: break;
454: case 0x03:
455: fdctrl_write_tape(fdctrl, value);
456: break;
457: case 0x04:
458: fdctrl_write_rate(fdctrl, value);
459: break;
460: case 0x05:
461: fdctrl_write_data(fdctrl, value);
462: break;
463: default:
464: break;
465: }
466: }
467:
468: static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
469: {
470: return fdctrl_read(opaque, reg);
471: }
472:
473: static void fdctrl_write_mem (void *opaque,
474: target_phys_addr_t reg, uint32_t value)
475: {
476: fdctrl_write(opaque, reg, value);
477: }
478:
479: static CPUReadMemoryFunc *fdctrl_mem_read[3] = {
480: fdctrl_read_mem,
481: fdctrl_read_mem,
482: fdctrl_read_mem,
483: };
484:
485: static CPUWriteMemoryFunc *fdctrl_mem_write[3] = {
486: fdctrl_write_mem,
487: fdctrl_write_mem,
488: fdctrl_write_mem,
489: };
490:
491: static void fd_change_cb (void *opaque)
492: {
493: fdrive_t *drv = opaque;
494:
495: FLOPPY_DPRINTF("disk change\n");
496: fd_revalidate(drv);
497: #if 0
498: fd_recalibrate(drv);
499: fdctrl_reset_fifo(drv->fdctrl);
500: fdctrl_raise_irq(drv->fdctrl, 0x20);
501: #endif
502: }
503:
504: fdctrl_t *fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped,
505: uint32_t io_base,
506: BlockDriverState **fds)
507: {
508: fdctrl_t *fdctrl;
509: int io_mem;
510: int i;
511:
512: FLOPPY_DPRINTF("init controller\n");
513: fdctrl = qemu_mallocz(sizeof(fdctrl_t));
514: if (!fdctrl)
515: return NULL;
516: fdctrl->result_timer = qemu_new_timer(vm_clock,
517: fdctrl_result_timer, fdctrl);
518:
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) {
525: fdctrl->dma_en = 1;
526: DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
527: } else {
528: fdctrl->dma_en = 0;
529: }
530: for (i = 0; i < 2; i++) {
531: fd_init(&fdctrl->drives[i], fds[i]);
532: if (fds[i]) {
533: bdrv_set_change_cb(fds[i],
534: &fd_change_cb, &fdctrl->drives[i]);
535: }
536: }
537: fdctrl_reset(fdctrl, 0);
538: fdctrl->state = FD_CTRL_ACTIVE;
539: if (mem_mapped) {
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);
542: } else {
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);
547: }
548: for (i = 0; i < 2; i++) {
549: fd_revalidate(&fdctrl->drives[i]);
550: }
551:
552: return fdctrl;
553: }
554:
555: /* XXX: may change if moved to bdrv */
556: int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
557: {
558: return fdctrl->drives[drive_num].drive;
559: }
560:
561: /* Change IRQ state */
562: static void fdctrl_reset_irq (fdctrl_t *fdctrl)
563: {
564: FLOPPY_DPRINTF("Reset interrupt\n");
565: pic_set_irq(fdctrl->irq_lvl, 0);
566: fdctrl->state &= ~FD_CTRL_INTR;
567: }
568:
569: static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
570: {
571: #ifdef TARGET_SPARC
572: // Sparc mutation
573: if (!fdctrl->dma_en) {
574: fdctrl->state &= ~FD_CTRL_BUSY;
575: fdctrl->int_status = status;
576: return;
577: }
578: #endif
579: if (~(fdctrl->state & FD_CTRL_INTR)) {
580: pic_set_irq(fdctrl->irq_lvl, 1);
581: fdctrl->state |= FD_CTRL_INTR;
582: }
583: FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
584: fdctrl->int_status = status;
585: }
586:
587: /* Reset controller */
588: static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
589: {
590: int i;
591:
592: FLOPPY_DPRINTF("reset controller\n");
593: fdctrl_reset_irq(fdctrl);
594: /* Initialise controller */
595: fdctrl->cur_drv = 0;
596: /* FIFO state */
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);
604: if (do_irq)
605: fdctrl_raise_irq(fdctrl, 0xc0);
606: }
607:
608: static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
609: {
610: return &fdctrl->drives[fdctrl->bootsel];
611: }
612:
613: static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
614: {
615: return &fdctrl->drives[1 - fdctrl->bootsel];
616: }
617:
618: static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
619: {
620: return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
621: }
622:
623: /* Status B register : 0x01 (read-only) */
624: static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
625: {
626: FLOPPY_DPRINTF("status register: 0x00\n");
627: return 0;
628: }
629:
630: /* Digital output register : 0x02 */
631: static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
632: {
633: uint32_t retval = 0;
634:
635: /* Drive motors state indicators */
636: if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
637: retval |= 1 << 5;
638: if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
639: retval |= 1 << 4;
640: /* DMA enable */
641: retval |= fdctrl->dma_en << 3;
642: /* Reset indicator */
643: retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
644: /* Selected drive */
645: retval |= fdctrl->cur_drv;
646: FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
647:
648: return retval;
649: }
650:
651: static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
652: {
653: /* Reset mode */
654: if (fdctrl->state & FD_CTRL_RESET) {
655: if (!(value & 0x04)) {
656: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
657: return;
658: }
659: }
660: FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
661: /* Drive motors state indicators */
662: if (value & 0x20)
663: fd_start(drv1(fdctrl));
664: else
665: fd_stop(drv1(fdctrl));
666: if (value & 0x10)
667: fd_start(drv0(fdctrl));
668: else
669: fd_stop(drv0(fdctrl));
670: /* DMA enable */
671: #if 0
672: if (fdctrl->dma_chann != -1)
673: fdctrl->dma_en = 1 - ((value >> 3) & 1);
674: #endif
675: /* Reset */
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;
680: }
681: } else {
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);
686: }
687: }
688: /* Selected drive */
689: fdctrl->cur_drv = value & 1;
690: }
691:
692: /* Tape drive register : 0x03 */
693: static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
694: {
695: uint32_t retval = 0;
696:
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);
701:
702: return retval;
703: }
704:
705: static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
706: {
707: /* Reset mode */
708: if (fdctrl->state & FD_CTRL_RESET) {
709: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
710: return;
711: }
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 */
716: }
717:
718: /* Main status register : 0x04 (read) */
719: static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
720: {
721: uint32_t retval = 0;
722:
723: fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
724: if (!(fdctrl->state & FD_CTRL_BUSY)) {
725: /* Data transfer allowed */
726: retval |= 0x80;
727: /* Data transfer direction indicator */
728: if (fdctrl->data_dir == FD_DIR_READ)
729: retval |= 0x40;
730: }
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)
735: retval |= 0x10;
736: FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
737:
738: return retval;
739: }
740:
741: /* Data select rate register : 0x04 (write) */
742: static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
743: {
744: /* Reset mode */
745: if (fdctrl->state & FD_CTRL_RESET) {
746: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
747: return;
748: }
749: FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
750: /* Reset: autoclear */
751: if (value & 0x80) {
752: fdctrl->state |= FD_CTRL_RESET;
753: fdctrl_reset(fdctrl, 1);
754: fdctrl->state &= ~FD_CTRL_RESET;
755: }
756: if (value & 0x40) {
757: fdctrl->state |= FD_CTRL_SLEEP;
758: fdctrl_reset(fdctrl, 1);
759: }
760: // fdctrl.precomp = (value >> 2) & 0x07;
761: }
762:
763: /* Digital input register : 0x07 (read-only) */
764: static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
765: {
766: uint32_t retval = 0;
767:
768: if (drv0(fdctrl)->drflags & FDRIVE_REVALIDATE ||
769: drv1(fdctrl)->drflags & FDRIVE_REVALIDATE)
770: retval |= 0x80;
771: if (retval != 0)
772: FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
773: drv0(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
774: drv1(fdctrl)->drflags &= ~FDRIVE_REVALIDATE;
775:
776: return retval;
777: }
778:
779: /* FIFO state control */
780: static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
781: {
782: fdctrl->data_dir = FD_DIR_WRITE;
783: fdctrl->data_pos = 0;
784: FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
785: }
786:
787: /* Set FIFO status for the host to read */
788: static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
789: {
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);
794: if (do_irq)
795: fdctrl_raise_irq(fdctrl, 0x00);
796: }
797:
798: /* Set an error: unimplemented/unknown command */
799: static void fdctrl_unimplemented (fdctrl_t *fdctrl)
800: {
801: #if 0
802: fdrive_t *cur_drv;
803:
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);
809: #else
810: // fdctrl_reset_fifo(fdctrl);
811: fdctrl->fifo[0] = 0x80;
812: fdctrl_set_fifo(fdctrl, 1, 0);
813: #endif
814: }
815:
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)
819: {
820: fdrive_t *cur_drv;
821:
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;
837: }
838: fdctrl_set_fifo(fdctrl, 7, 1);
839: }
840:
841: /* Prepare a data transfer (either DMA or FIFO) */
842: static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
843: {
844: fdrive_t *cur_drv;
845: uint8_t kh, kt, ks;
846: int did_seek;
847:
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));
856: did_seek = 0;
857: switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
858: case 2:
859: /* sect too big */
860: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
861: fdctrl->fifo[3] = kt;
862: fdctrl->fifo[4] = kh;
863: fdctrl->fifo[5] = ks;
864: return;
865: case 3:
866: /* track too big */
867: fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
868: fdctrl->fifo[3] = kt;
869: fdctrl->fifo[4] = kh;
870: fdctrl->fifo[5] = ks;
871: return;
872: case 4:
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;
878: return;
879: case 1:
880: did_seek = 1;
881: break;
882: default:
883: break;
884: }
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;
891: else
892: fdctrl->data_state &= ~FD_STATE_MULTI;
893: if (did_seek)
894: fdctrl->data_state |= FD_STATE_SEEK;
895: else
896: fdctrl->data_state &= ~FD_STATE_SEEK;
897: if (fdctrl->fifo[5] == 00) {
898: fdctrl->data_len = fdctrl->fifo[8];
899: } else {
900: int tmp;
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;
906: }
907: fdctrl->eot = fdctrl->fifo[6];
908: if (fdctrl->dma_en) {
909: int dma_mode;
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",
914: dma_mode, direction,
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
924: * recall us...
925: */
926: DMA_hold_DREQ(fdctrl->dma_chann);
927: DMA_schedule(fdctrl->dma_chann);
928: return;
929: } else {
930: FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
931: }
932: }
933: FLOPPY_DPRINTF("start non-DMA transfer\n");
934: /* IO based transfer: calculate len */
935: fdctrl_raise_irq(fdctrl, 0x00);
936:
937: return;
938: }
939:
940: /* Prepare a transfer of deleted data */
941: static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
942: {
943: /* We don't handle deleted data,
944: * so we don't return *ANYTHING*
945: */
946: fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
947: }
948:
949: /* handlers for DMA transfers */
950: static int fdctrl_transfer_handler (void *opaque, int nchan,
951: int dma_pos, int dma_len)
952: {
953: fdctrl_t *fdctrl;
954: fdrive_t *cur_drv;
955: int len, start_pos, rel_pos;
956: uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
957:
958: fdctrl = opaque;
959: if (!(fdctrl->state & FD_CTRL_BUSY)) {
960: FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
961: return 0;
962: }
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)
966: status2 = 0x04;
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);
972: else
973: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
974: len = 0;
975: goto transfer_error;
976: }
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",
993: fd_sector(cur_drv));
994: /* Sure, image size is too small... */
995: memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
996: }
997: }
998: switch (fdctrl->data_dir) {
999: case FD_DIR_READ:
1000: /* READ commands */
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); */
1005: break;
1006: case FD_DIR_WRITE:
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;
1017: }
1018: break;
1019: default:
1020: /* SCAN commands */
1021: {
1022: uint8_t tmpbuf[FD_SECTOR_LEN];
1023: int ret;
1024: DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1025: /* cpu_physical_memory_read(addr + fdctrl->data_pos, */
1026: /* tmpbuf, len); */
1027: ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1028: if (ret == 0) {
1029: status2 = 0x08;
1030: goto end_transfer;
1031: }
1032: if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1033: (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1034: status2 = 0x00;
1035: goto end_transfer;
1036: }
1037: }
1038: break;
1039: }
1040: fdctrl->data_pos += len;
1041: rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1042: if (rel_pos == 0) {
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,
1046: fd_sector(cur_drv),
1047: fdctrl->data_pos - len);
1048: /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1049: error in fact */
1050: if (cur_drv->sect >= cur_drv->last_sect ||
1051: cur_drv->sect == fdctrl->eot) {
1052: cur_drv->sect = 1;
1053: if (FD_MULTI_TRACK(fdctrl->data_state)) {
1054: if (cur_drv->head == 0 &&
1055: (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1056: cur_drv->head = 1;
1057: } else {
1058: cur_drv->head = 0;
1059: cur_drv->track++;
1060: if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1061: break;
1062: }
1063: } else {
1064: cur_drv->track++;
1065: break;
1066: }
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));
1070: } else {
1071: cur_drv->sect++;
1072: }
1073: }
1074: }
1075: end_transfer:
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)
1082: status2 = 0x08;
1083: if (FD_DID_SEEK(fdctrl->data_state))
1084: status0 |= 0x20;
1085: fdctrl->data_len -= len;
1086: // if (fdctrl->data_len == 0)
1087: fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1088: transfer_error:
1089:
1090: return len;
1091: }
1092:
1093: /* Data register : 0x05 */
1094: static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1095: {
1096: fdrive_t *cur_drv;
1097: uint32_t retval = 0;
1098: int pos, len;
1099:
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");
1104: return 0;
1105: }
1106: pos = fdctrl->data_pos;
1107: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1108: pos %= FD_SECTOR_LEN;
1109: if (pos == 0) {
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),
1114: fdctrl->fifo, len);
1115: }
1116: }
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
1122: */
1123: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1124: fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1125: } else {
1126: fdctrl_reset_fifo(fdctrl);
1127: fdctrl_reset_irq(fdctrl);
1128: }
1129: }
1130: FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1131:
1132: return retval;
1133: }
1134:
1135: static void fdctrl_format_sector (fdctrl_t *fdctrl)
1136: {
1137: fdrive_t *cur_drv;
1138: uint8_t kh, kt, ks;
1139: int did_seek;
1140:
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));
1149: did_seek = 0;
1150: switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1151: case 2:
1152: /* sect too big */
1153: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1154: fdctrl->fifo[3] = kt;
1155: fdctrl->fifo[4] = kh;
1156: fdctrl->fifo[5] = ks;
1157: return;
1158: case 3:
1159: /* track too big */
1160: fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1161: fdctrl->fifo[3] = kt;
1162: fdctrl->fifo[4] = kh;
1163: fdctrl->fifo[5] = ks;
1164: return;
1165: case 4:
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;
1171: return;
1172: case 1:
1173: did_seek = 1;
1174: fdctrl->data_state |= FD_STATE_SEEK;
1175: break;
1176: default:
1177: break;
1178: }
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);
1184: } else {
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);
1190: else
1191: fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1192: } else {
1193: /* More to do */
1194: fdctrl->data_pos = 0;
1195: fdctrl->data_len = 4;
1196: }
1197: }
1198: }
1199:
1200: static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1201: {
1202: fdrive_t *cur_drv;
1203:
1204: cur_drv = get_cur_drv(fdctrl);
1205: /* Reset mode */
1206: if (fdctrl->state & FD_CTRL_RESET) {
1207: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1208: return;
1209: }
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");
1213: return;
1214: }
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);
1223: }
1224: /* Switch from transfer mode to status mode
1225: * then from status mode to command mode
1226: */
1227: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1228: fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1229: return;
1230: }
1231: if (fdctrl->data_pos == 0) {
1232: /* Command */
1233: switch (value & 0x5F) {
1234: case 0x46:
1235: /* READ variants */
1236: FLOPPY_DPRINTF("READ command\n");
1237: /* 8 parameters cmd */
1238: fdctrl->data_len = 9;
1239: goto enqueue;
1240: case 0x4C:
1241: /* READ_DELETED variants */
1242: FLOPPY_DPRINTF("READ_DELETED command\n");
1243: /* 8 parameters cmd */
1244: fdctrl->data_len = 9;
1245: goto enqueue;
1246: case 0x50:
1247: /* SCAN_EQUAL variants */
1248: FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1249: /* 8 parameters cmd */
1250: fdctrl->data_len = 9;
1251: goto enqueue;
1252: case 0x56:
1253: /* VERIFY variants */
1254: FLOPPY_DPRINTF("VERIFY command\n");
1255: /* 8 parameters cmd */
1256: fdctrl->data_len = 9;
1257: goto enqueue;
1258: case 0x59:
1259: /* SCAN_LOW_OR_EQUAL variants */
1260: FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1261: /* 8 parameters cmd */
1262: fdctrl->data_len = 9;
1263: goto enqueue;
1264: case 0x5D:
1265: /* SCAN_HIGH_OR_EQUAL variants */
1266: FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1267: /* 8 parameters cmd */
1268: fdctrl->data_len = 9;
1269: goto enqueue;
1270: default:
1271: break;
1272: }
1273: switch (value & 0x7F) {
1274: case 0x45:
1275: /* WRITE variants */
1276: FLOPPY_DPRINTF("WRITE command\n");
1277: /* 8 parameters cmd */
1278: fdctrl->data_len = 9;
1279: goto enqueue;
1280: case 0x49:
1281: /* WRITE_DELETED variants */
1282: FLOPPY_DPRINTF("WRITE_DELETED command\n");
1283: /* 8 parameters cmd */
1284: fdctrl->data_len = 9;
1285: goto enqueue;
1286: default:
1287: break;
1288: }
1289: switch (value) {
1290: case 0x03:
1291: /* SPECIFY */
1292: FLOPPY_DPRINTF("SPECIFY command\n");
1293: /* 1 parameter cmd */
1294: fdctrl->data_len = 3;
1295: goto enqueue;
1296: case 0x04:
1297: /* SENSE_DRIVE_STATUS */
1298: FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1299: /* 1 parameter cmd */
1300: fdctrl->data_len = 2;
1301: goto enqueue;
1302: case 0x07:
1303: /* RECALIBRATE */
1304: FLOPPY_DPRINTF("RECALIBRATE command\n");
1305: /* 1 parameter cmd */
1306: fdctrl->data_len = 2;
1307: goto enqueue;
1308: case 0x08:
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 */
1313: #if 0
1314: fdctrl->fifo[0] =
1315: fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1316: #else
1317: /* XXX: int_status handling is broken for read/write
1318: commands, so we do this hack. It should be suppressed
1319: ASAP */
1320: fdctrl->fifo[0] =
1321: 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1322: #endif
1323: fdctrl->fifo[1] = cur_drv->track;
1324: fdctrl_set_fifo(fdctrl, 2, 0);
1325: fdctrl_reset_irq(fdctrl);
1326: fdctrl->int_status = 0xC0;
1327: return;
1328: case 0x0E:
1329: /* DUMPREG */
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;
1336: /* timers */
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);
1345: return;
1346: case 0x0F:
1347: /* SEEK */
1348: FLOPPY_DPRINTF("SEEK command\n");
1349: /* 2 parameters cmd */
1350: fdctrl->data_len = 3;
1351: goto enqueue;
1352: case 0x10:
1353: /* VERSION */
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);
1359: return;
1360: case 0x12:
1361: /* PERPENDICULAR_MODE */
1362: FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1363: /* 1 parameter cmd */
1364: fdctrl->data_len = 2;
1365: goto enqueue;
1366: case 0x13:
1367: /* CONFIGURE */
1368: FLOPPY_DPRINTF("CONFIGURE command\n");
1369: /* 3 parameters cmd */
1370: fdctrl->data_len = 4;
1371: goto enqueue;
1372: case 0x14:
1373: /* UNLOCK */
1374: FLOPPY_DPRINTF("UNLOCK command\n");
1375: /* No parameters cmd */
1376: fdctrl->lock = 0;
1377: fdctrl->fifo[0] = 0;
1378: fdctrl_set_fifo(fdctrl, 1, 0);
1379: return;
1380: case 0x17:
1381: /* POWERDOWN_MODE */
1382: FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1383: /* 2 parameters cmd */
1384: fdctrl->data_len = 3;
1385: goto enqueue;
1386: case 0x18:
1387: /* PART_ID */
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);
1392: return;
1393: case 0x2C:
1394: /* SAVE */
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;
1404: /* timers */
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);
1416: return;
1417: case 0x33:
1418: /* OPTION */
1419: FLOPPY_DPRINTF("OPTION command\n");
1420: /* 1 parameter cmd */
1421: fdctrl->data_len = 2;
1422: goto enqueue;
1423: case 0x42:
1424: /* READ_TRACK */
1425: FLOPPY_DPRINTF("READ_TRACK command\n");
1426: /* 8 parameters cmd */
1427: fdctrl->data_len = 9;
1428: goto enqueue;
1429: case 0x4A:
1430: /* READ_ID */
1431: FLOPPY_DPRINTF("READ_ID command\n");
1432: /* 1 parameter cmd */
1433: fdctrl->data_len = 2;
1434: goto enqueue;
1435: case 0x4C:
1436: /* RESTORE */
1437: FLOPPY_DPRINTF("RESTORE command\n");
1438: /* 17 parameters cmd */
1439: fdctrl->data_len = 18;
1440: goto enqueue;
1441: case 0x4D:
1442: /* FORMAT_TRACK */
1443: FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1444: /* 5 parameters cmd */
1445: fdctrl->data_len = 6;
1446: goto enqueue;
1447: case 0x8E:
1448: /* DRIVE_SPECIFICATION_COMMAND */
1449: FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1450: /* 5 parameters cmd */
1451: fdctrl->data_len = 6;
1452: goto enqueue;
1453: case 0x8F:
1454: /* RELATIVE_SEEK_OUT */
1455: FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1456: /* 2 parameters cmd */
1457: fdctrl->data_len = 3;
1458: goto enqueue;
1459: case 0x94:
1460: /* LOCK */
1461: FLOPPY_DPRINTF("LOCK command\n");
1462: /* No parameters cmd */
1463: fdctrl->lock = 1;
1464: fdctrl->fifo[0] = 0x10;
1465: fdctrl_set_fifo(fdctrl, 1, 1);
1466: return;
1467: case 0xCD:
1468: /* FORMAT_AND_WRITE */
1469: FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1470: /* 10 parameters cmd */
1471: fdctrl->data_len = 11;
1472: goto enqueue;
1473: case 0xCF:
1474: /* RELATIVE_SEEK_IN */
1475: FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1476: /* 2 parameters cmd */
1477: fdctrl->data_len = 3;
1478: goto enqueue;
1479: default:
1480: /* Unknown command */
1481: FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1482: fdctrl_unimplemented(fdctrl);
1483: return;
1484: }
1485: }
1486: enqueue:
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
1492: */
1493: if (fdctrl->data_state & FD_STATE_FORMAT) {
1494: fdctrl_format_sector(fdctrl);
1495: return;
1496: }
1497: switch (fdctrl->fifo[0] & 0x1F) {
1498: case 0x06:
1499: {
1500: /* READ variants */
1501: FLOPPY_DPRINTF("treat READ command\n");
1502: fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1503: return;
1504: }
1505: case 0x0C:
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);
1510: return;
1511: case 0x16:
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);
1516: return;
1517: case 0x10:
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);
1522: return;
1523: case 0x19:
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);
1528: return;
1529: case 0x1D:
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);
1534: return;
1535: default:
1536: break;
1537: }
1538: switch (fdctrl->fifo[0] & 0x3F) {
1539: case 0x05:
1540: /* WRITE variants */
1541: FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1542: fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1543: return;
1544: case 0x09:
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);
1549: return;
1550: default:
1551: break;
1552: }
1553: switch (fdctrl->fifo[0]) {
1554: case 0x03:
1555: /* SPECIFY */
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);
1562: break;
1563: case 0x04:
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) |
1573: fdctrl->cur_drv |
1574: 0x28;
1575: fdctrl_set_fifo(fdctrl, 1, 0);
1576: break;
1577: case 0x07:
1578: /* RECALIBRATE */
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);
1586: break;
1587: case 0x0F:
1588: /* SEEK */
1589: FLOPPY_DPRINTF("treat SEEK command\n");
1590: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1591: cur_drv = get_cur_drv(fdctrl);
1592: fd_start(cur_drv);
1593: if (fdctrl->fifo[2] <= cur_drv->track)
1594: cur_drv->dir = 1;
1595: else
1596: cur_drv->dir = 0;
1597: fdctrl_reset_fifo(fdctrl);
1598: if (fdctrl->fifo[2] > cur_drv->max_track) {
1599: fdctrl_raise_irq(fdctrl, 0x60);
1600: } else {
1601: cur_drv->track = fdctrl->fifo[2];
1602: /* Raise Interrupt */
1603: fdctrl_raise_irq(fdctrl, 0x20);
1604: }
1605: break;
1606: case 0x12:
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);
1613: break;
1614: case 0x13:
1615: /* CONFIGURE */
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);
1621: break;
1622: case 0x17:
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);
1628: break;
1629: case 0x33:
1630: /* OPTION */
1631: FLOPPY_DPRINTF("treat OPTION command\n");
1632: /* No result back */
1633: fdctrl_reset_fifo(fdctrl);
1634: break;
1635: case 0x42:
1636: /* READ_TRACK */
1637: // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1638: FLOPPY_ERROR("treat READ_TRACK command\n");
1639: fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1640: break;
1641: case 0x4A:
1642: /* READ_ID */
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));
1648: break;
1649: case 0x4C:
1650: /* RESTORE */
1651: FLOPPY_DPRINTF("treat RESTORE command\n");
1652: /* Drives position */
1653: drv0(fdctrl)->track = fdctrl->fifo[3];
1654: drv1(fdctrl)->track = fdctrl->fifo[4];
1655: /* timers */
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);
1665: break;
1666: case 0x4D:
1667: /* FORMAT_TRACK */
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;
1674: else
1675: fdctrl->data_state &= ~FD_STATE_MULTI;
1676: fdctrl->data_state &= ~FD_STATE_SEEK;
1677: cur_drv->bps =
1678: fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1679: #if 0
1680: cur_drv->last_sect =
1681: cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
1682: fdctrl->fifo[3] / 2;
1683: #else
1684: cur_drv->last_sect = fdctrl->fifo[3];
1685: #endif
1686: /* Bochs BIOS is buggy and don't send format informations
1687: * for each sector. So, pretend all's done right now...
1688: */
1689: fdctrl->data_state &= ~FD_STATE_FORMAT;
1690: fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1691: break;
1692: case 0x8E:
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);
1702: } else {
1703: fdctrl_reset_fifo(fdctrl);
1704: }
1705: } else if (fdctrl->data_len > 7) {
1706: /* ERROR */
1707: fdctrl->fifo[0] = 0x80 |
1708: (cur_drv->head << 2) | fdctrl->cur_drv;
1709: fdctrl_set_fifo(fdctrl, 1, 1);
1710: }
1711: break;
1712: case 0x8F:
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);
1717: fd_start(cur_drv);
1718: cur_drv->dir = 0;
1719: if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1720: cur_drv->track = cur_drv->max_track - 1;
1721: } else {
1722: cur_drv->track += fdctrl->fifo[2];
1723: }
1724: fdctrl_reset_fifo(fdctrl);
1725: fdctrl_raise_irq(fdctrl, 0x20);
1726: break;
1727: case 0xCD:
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);
1732: break;
1733: case 0xCF:
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);
1738: fd_start(cur_drv);
1739: cur_drv->dir = 1;
1740: if (fdctrl->fifo[2] > cur_drv->track) {
1741: cur_drv->track = 0;
1742: } else {
1743: cur_drv->track -= fdctrl->fifo[2];
1744: }
1745: fdctrl_reset_fifo(fdctrl);
1746: /* Raise Interrupt */
1747: fdctrl_raise_irq(fdctrl, 0x20);
1748: break;
1749: }
1750: }
1751: }
1752:
1753: static void fdctrl_result_timer(void *opaque)
1754: {
1755: fdctrl_t *fdctrl = opaque;
1756: fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1757: }
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