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1.1 root 1: /*
2: * QEMU Floppy disk emulator (Intel 82078)
1.1.1.3 ! root 3: *
! 4: * Copyright (c) 2003, 2007 Jocelyn Mayer
! 5: *
1.1 root 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: */
1.1.1.3 ! root 28: #include "hw.h"
! 29: #include "fdc.h"
! 30: #include "block.h"
! 31: #include "qemu-timer.h"
! 32: #include "isa.h"
1.1 root 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,
1.1.1.3 ! root 113: uint8_t sect, uint8_t last_sect)
1.1 root 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 ||
1.1.1.3 ! root 131: (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
1.1 root 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;
1.1.1.3 ! root 156: if (drv->track != track)
! 157: ret = 1;
1.1 root 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;
1.1.1.3 ! root 183: const char *str;
1.1 root 184: } fd_format_t;
185:
1.1.1.3 ! root 186: static const fd_format_t fd_formats[] = {
1.1 root 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", },
1.1.1.3 ! root 224: /* 320 kB 5"1/4 floppy disks */
1.1 root 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: {
1.1.1.3 ! root 236: const fd_format_t *parse;
! 237: uint64_t nb_sectors, size;
1.1 root 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)) {
1.1.1.3 ! root 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)",
1.1 root 247: nb_heads - 1, max_track, last_sect);
1.1.1.3 ! root 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,
1.1 root 280: nb_heads, max_track, last_sect, ro ? "ro" : "rw");
1.1.1.3 ! root 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;
1.1 root 290: } else {
1.1.1.3 ! root 291: FLOPPY_DPRINTF("No disk in drive\n");
1.1 root 292: drv->last_sect = 0;
1.1.1.3 ! root 293: drv->max_track = 0;
! 294: drv->flags &= ~FDISK_DBL_SIDES;
1.1 root 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 */
1.1.1.3 ! root 375: qemu_irq irq;
1.1 root 376: int dma_chann;
1.1.1.3 ! root 377: target_phys_addr_t io_base;
1.1 root 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 */
1.1.1.3 ! root 385: uint8_t *fifo;
1.1 root 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;
1.1.1.3 ! root 402: /* Sun4m quirks? */
! 403: int sun4m;
1.1 root 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:
1.1.1.3 ! root 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;
1.1 root 422: case 0x01:
1.1.1.3 ! root 423: retval = fdctrl_read_statusB(fdctrl);
! 424: break;
1.1 root 425: case 0x02:
1.1.1.3 ! root 426: retval = fdctrl_read_dor(fdctrl);
! 427: break;
1.1 root 428: case 0x03:
429: retval = fdctrl_read_tape(fdctrl);
1.1.1.3 ! root 430: break;
1.1 root 431: case 0x04:
432: retval = fdctrl_read_main_status(fdctrl);
1.1.1.3 ! root 433: break;
1.1 root 434: case 0x05:
435: retval = fdctrl_read_data(fdctrl);
1.1.1.3 ! root 436: break;
1.1 root 437: case 0x07:
438: retval = fdctrl_read_dir(fdctrl);
1.1.1.3 ! root 439: break;
1.1 root 440: default:
1.1.1.3 ! root 441: retval = (uint32_t)(-1);
! 442: break;
1.1 root 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:
1.1.1.3 ! root 457: fdctrl_write_dor(fdctrl, value);
! 458: break;
1.1 root 459: case 0x03:
460: fdctrl_write_tape(fdctrl, value);
1.1.1.3 ! root 461: break;
1.1 root 462: case 0x04:
463: fdctrl_write_rate(fdctrl, value);
1.1.1.3 ! root 464: break;
1.1 root 465: case 0x05:
466: fdctrl_write_data(fdctrl, value);
1.1.1.3 ! root 467: break;
1.1 root 468: default:
1.1.1.3 ! root 469: break;
1.1 root 470: }
471: }
472:
473: static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg)
474: {
1.1.1.3 ! root 475: return fdctrl_read(opaque, (uint32_t)reg);
1.1 root 476: }
477:
1.1.1.3 ! root 478: static void fdctrl_write_mem (void *opaque,
1.1 root 479: target_phys_addr_t reg, uint32_t value)
480: {
1.1.1.3 ! root 481: fdctrl_write(opaque, (uint32_t)reg, value);
1.1 root 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:
1.1.1.3 ! root 496: static CPUReadMemoryFunc *fdctrl_mem_read_strict[3] = {
! 497: fdctrl_read_mem,
! 498: NULL,
! 499: NULL,
! 500: };
! 501:
! 502: static CPUWriteMemoryFunc *fdctrl_mem_write_strict[3] = {
! 503: fdctrl_write_mem,
! 504: NULL,
! 505: NULL,
! 506: };
! 507:
! 508: static void fd_save (QEMUFile *f, fdrive_t *fd)
! 509: {
! 510: uint8_t tmp;
! 511:
! 512: tmp = fd->drflags;
! 513: qemu_put_8s(f, &tmp);
! 514: qemu_put_8s(f, &fd->head);
! 515: qemu_put_8s(f, &fd->track);
! 516: qemu_put_8s(f, &fd->sect);
! 517: qemu_put_8s(f, &fd->dir);
! 518: qemu_put_8s(f, &fd->rw);
! 519: }
! 520:
! 521: static void fdc_save (QEMUFile *f, void *opaque)
! 522: {
! 523: fdctrl_t *s = opaque;
! 524:
! 525: qemu_put_8s(f, &s->state);
! 526: qemu_put_8s(f, &s->dma_en);
! 527: qemu_put_8s(f, &s->cur_drv);
! 528: qemu_put_8s(f, &s->bootsel);
! 529: qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN);
! 530: qemu_put_be32s(f, &s->data_pos);
! 531: qemu_put_be32s(f, &s->data_len);
! 532: qemu_put_8s(f, &s->data_state);
! 533: qemu_put_8s(f, &s->data_dir);
! 534: qemu_put_8s(f, &s->int_status);
! 535: qemu_put_8s(f, &s->eot);
! 536: qemu_put_8s(f, &s->timer0);
! 537: qemu_put_8s(f, &s->timer1);
! 538: qemu_put_8s(f, &s->precomp_trk);
! 539: qemu_put_8s(f, &s->config);
! 540: qemu_put_8s(f, &s->lock);
! 541: qemu_put_8s(f, &s->pwrd);
! 542: fd_save(f, &s->drives[0]);
! 543: fd_save(f, &s->drives[1]);
! 544: }
! 545:
! 546: static int fd_load (QEMUFile *f, fdrive_t *fd)
! 547: {
! 548: uint8_t tmp;
! 549:
! 550: qemu_get_8s(f, &tmp);
! 551: fd->drflags = tmp;
! 552: qemu_get_8s(f, &fd->head);
! 553: qemu_get_8s(f, &fd->track);
! 554: qemu_get_8s(f, &fd->sect);
! 555: qemu_get_8s(f, &fd->dir);
! 556: qemu_get_8s(f, &fd->rw);
! 557:
! 558: return 0;
! 559: }
! 560:
! 561: static int fdc_load (QEMUFile *f, void *opaque, int version_id)
! 562: {
! 563: fdctrl_t *s = opaque;
! 564: int ret;
! 565:
! 566: if (version_id != 1)
! 567: return -EINVAL;
! 568:
! 569: qemu_get_8s(f, &s->state);
! 570: qemu_get_8s(f, &s->dma_en);
! 571: qemu_get_8s(f, &s->cur_drv);
! 572: qemu_get_8s(f, &s->bootsel);
! 573: qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN);
! 574: qemu_get_be32s(f, &s->data_pos);
! 575: qemu_get_be32s(f, &s->data_len);
! 576: qemu_get_8s(f, &s->data_state);
! 577: qemu_get_8s(f, &s->data_dir);
! 578: qemu_get_8s(f, &s->int_status);
! 579: qemu_get_8s(f, &s->eot);
! 580: qemu_get_8s(f, &s->timer0);
! 581: qemu_get_8s(f, &s->timer1);
! 582: qemu_get_8s(f, &s->precomp_trk);
! 583: qemu_get_8s(f, &s->config);
! 584: qemu_get_8s(f, &s->lock);
! 585: qemu_get_8s(f, &s->pwrd);
! 586:
! 587: ret = fd_load(f, &s->drives[0]);
! 588: if (ret == 0)
! 589: ret = fd_load(f, &s->drives[1]);
! 590:
! 591: return ret;
! 592: }
! 593:
! 594: static void fdctrl_external_reset(void *opaque)
! 595: {
! 596: fdctrl_t *s = opaque;
! 597:
! 598: fdctrl_reset(s, 0);
! 599: }
! 600:
! 601: static fdctrl_t *fdctrl_init_common (qemu_irq irq, int dma_chann,
! 602: target_phys_addr_t io_base,
! 603: BlockDriverState **fds)
1.1 root 604: {
605: fdctrl_t *fdctrl;
606: int i;
607:
608: FLOPPY_DPRINTF("init controller\n");
609: fdctrl = qemu_mallocz(sizeof(fdctrl_t));
610: if (!fdctrl)
611: return NULL;
1.1.1.3 ! root 612: fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN);
! 613: if (fdctrl->fifo == NULL) {
! 614: qemu_free(fdctrl);
! 615: return NULL;
! 616: }
! 617: fdctrl->result_timer = qemu_new_timer(vm_clock,
1.1 root 618: fdctrl_result_timer, fdctrl);
619:
620: fdctrl->version = 0x90; /* Intel 82078 controller */
1.1.1.3 ! root 621: fdctrl->irq = irq;
1.1 root 622: fdctrl->dma_chann = dma_chann;
623: fdctrl->io_base = io_base;
624: fdctrl->config = 0x60; /* Implicit seek, polling & FIFO enabled */
625: if (fdctrl->dma_chann != -1) {
626: fdctrl->dma_en = 1;
627: DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl);
628: } else {
629: fdctrl->dma_en = 0;
630: }
631: for (i = 0; i < 2; i++) {
632: fd_init(&fdctrl->drives[i], fds[i]);
633: }
634: fdctrl_reset(fdctrl, 0);
635: fdctrl->state = FD_CTRL_ACTIVE;
1.1.1.3 ! root 636: register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl);
! 637: qemu_register_reset(fdctrl_external_reset, fdctrl);
! 638: for (i = 0; i < 2; i++) {
! 639: fd_revalidate(&fdctrl->drives[i]);
! 640: }
! 641:
! 642: return fdctrl;
! 643: }
! 644:
! 645: fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
! 646: target_phys_addr_t io_base,
! 647: BlockDriverState **fds)
! 648: {
! 649: fdctrl_t *fdctrl;
! 650: int io_mem;
! 651:
! 652: fdctrl = fdctrl_init_common(irq, dma_chann, io_base, fds);
! 653:
! 654: fdctrl->sun4m = 0;
1.1 root 655: if (mem_mapped) {
1.1.1.3 ! root 656: io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
! 657: fdctrl);
1.1 root 658: cpu_register_physical_memory(io_base, 0x08, io_mem);
659: } else {
1.1.1.3 ! root 660: register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read,
! 661: fdctrl);
! 662: register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read,
! 663: fdctrl);
! 664: register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write,
! 665: fdctrl);
! 666: register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write,
! 667: fdctrl);
1.1 root 668: }
669:
670: return fdctrl;
671: }
672:
1.1.1.3 ! root 673: fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base,
! 674: BlockDriverState **fds)
! 675: {
! 676: fdctrl_t *fdctrl;
! 677: int io_mem;
! 678:
! 679: fdctrl = fdctrl_init_common(irq, 0, io_base, fds);
! 680: fdctrl->sun4m = 1;
! 681: io_mem = cpu_register_io_memory(0, fdctrl_mem_read_strict,
! 682: fdctrl_mem_write_strict,
! 683: fdctrl);
! 684: cpu_register_physical_memory(io_base, 0x08, io_mem);
! 685:
! 686: return fdctrl;
! 687: }
! 688:
1.1 root 689: /* XXX: may change if moved to bdrv */
690: int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num)
691: {
692: return fdctrl->drives[drive_num].drive;
693: }
694:
695: /* Change IRQ state */
696: static void fdctrl_reset_irq (fdctrl_t *fdctrl)
697: {
698: FLOPPY_DPRINTF("Reset interrupt\n");
1.1.1.3 ! root 699: qemu_set_irq(fdctrl->irq, 0);
1.1 root 700: fdctrl->state &= ~FD_CTRL_INTR;
701: }
702:
703: static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status)
704: {
705: // Sparc mutation
1.1.1.3 ! root 706: if (fdctrl->sun4m && !fdctrl->dma_en) {
! 707: fdctrl->state &= ~FD_CTRL_BUSY;
! 708: fdctrl->int_status = status;
! 709: return;
1.1 root 710: }
711: if (~(fdctrl->state & FD_CTRL_INTR)) {
1.1.1.3 ! root 712: qemu_set_irq(fdctrl->irq, 1);
1.1 root 713: fdctrl->state |= FD_CTRL_INTR;
714: }
715: FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
716: fdctrl->int_status = status;
717: }
718:
719: /* Reset controller */
720: static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq)
721: {
722: int i;
723:
724: FLOPPY_DPRINTF("reset controller\n");
725: fdctrl_reset_irq(fdctrl);
726: /* Initialise controller */
727: fdctrl->cur_drv = 0;
728: /* FIFO state */
729: fdctrl->data_pos = 0;
730: fdctrl->data_len = 0;
731: fdctrl->data_state = FD_STATE_CMD;
732: fdctrl->data_dir = FD_DIR_WRITE;
733: for (i = 0; i < MAX_FD; i++)
734: fd_reset(&fdctrl->drives[i]);
735: fdctrl_reset_fifo(fdctrl);
736: if (do_irq)
737: fdctrl_raise_irq(fdctrl, 0xc0);
738: }
739:
740: static inline fdrive_t *drv0 (fdctrl_t *fdctrl)
741: {
742: return &fdctrl->drives[fdctrl->bootsel];
743: }
744:
745: static inline fdrive_t *drv1 (fdctrl_t *fdctrl)
746: {
747: return &fdctrl->drives[1 - fdctrl->bootsel];
748: }
749:
750: static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
751: {
752: return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl);
753: }
754:
755: /* Status B register : 0x01 (read-only) */
756: static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
757: {
758: FLOPPY_DPRINTF("status register: 0x00\n");
759: return 0;
760: }
761:
762: /* Digital output register : 0x02 */
763: static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
764: {
765: uint32_t retval = 0;
766:
767: /* Drive motors state indicators */
768: if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
1.1.1.3 ! root 769: retval |= 1 << 5;
1.1 root 770: if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
1.1.1.3 ! root 771: retval |= 1 << 4;
1.1 root 772: /* DMA enable */
773: retval |= fdctrl->dma_en << 3;
774: /* Reset indicator */
775: retval |= (fdctrl->state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
776: /* Selected drive */
777: retval |= fdctrl->cur_drv;
778: FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
779:
780: return retval;
781: }
782:
783: static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value)
784: {
785: /* Reset mode */
786: if (fdctrl->state & FD_CTRL_RESET) {
787: if (!(value & 0x04)) {
788: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
789: return;
790: }
791: }
792: FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
793: /* Drive motors state indicators */
794: if (value & 0x20)
795: fd_start(drv1(fdctrl));
796: else
797: fd_stop(drv1(fdctrl));
798: if (value & 0x10)
799: fd_start(drv0(fdctrl));
800: else
801: fd_stop(drv0(fdctrl));
802: /* DMA enable */
803: #if 0
804: if (fdctrl->dma_chann != -1)
805: fdctrl->dma_en = 1 - ((value >> 3) & 1);
806: #endif
807: /* Reset */
808: if (!(value & 0x04)) {
809: if (!(fdctrl->state & FD_CTRL_RESET)) {
810: FLOPPY_DPRINTF("controller enter RESET state\n");
811: fdctrl->state |= FD_CTRL_RESET;
812: }
813: } else {
814: if (fdctrl->state & FD_CTRL_RESET) {
815: FLOPPY_DPRINTF("controller out of RESET state\n");
816: fdctrl_reset(fdctrl, 1);
817: fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
818: }
819: }
820: /* Selected drive */
821: fdctrl->cur_drv = value & 1;
822: }
823:
824: /* Tape drive register : 0x03 */
825: static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
826: {
827: uint32_t retval = 0;
828:
829: /* Disk boot selection indicator */
830: retval |= fdctrl->bootsel << 2;
831: /* Tape indicators: never allowed */
832: FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
833:
834: return retval;
835: }
836:
837: static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value)
838: {
839: /* Reset mode */
840: if (fdctrl->state & FD_CTRL_RESET) {
841: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
842: return;
843: }
844: FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
845: /* Disk boot selection indicator */
846: fdctrl->bootsel = (value >> 2) & 1;
847: /* Tape indicators: never allow */
848: }
849:
850: /* Main status register : 0x04 (read) */
851: static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
852: {
853: uint32_t retval = 0;
854:
855: fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
856: if (!(fdctrl->state & FD_CTRL_BUSY)) {
857: /* Data transfer allowed */
858: retval |= 0x80;
859: /* Data transfer direction indicator */
860: if (fdctrl->data_dir == FD_DIR_READ)
861: retval |= 0x40;
862: }
863: /* Should handle 0x20 for SPECIFY command */
864: /* Command busy indicator */
865: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
866: FD_STATE(fdctrl->data_state) == FD_STATE_STATUS)
867: retval |= 0x10;
868: FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
869:
870: return retval;
871: }
872:
873: /* Data select rate register : 0x04 (write) */
874: static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value)
875: {
876: /* Reset mode */
877: if (fdctrl->state & FD_CTRL_RESET) {
1.1.1.3 ! root 878: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
! 879: return;
! 880: }
1.1 root 881: FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
882: /* Reset: autoclear */
883: if (value & 0x80) {
884: fdctrl->state |= FD_CTRL_RESET;
885: fdctrl_reset(fdctrl, 1);
886: fdctrl->state &= ~FD_CTRL_RESET;
887: }
888: if (value & 0x40) {
889: fdctrl->state |= FD_CTRL_SLEEP;
890: fdctrl_reset(fdctrl, 1);
891: }
892: // fdctrl.precomp = (value >> 2) & 0x07;
893: }
894:
1.1.1.2 root 895: static int fdctrl_media_changed(fdrive_t *drv)
896: {
897: int ret;
1.1.1.3 ! root 898:
! 899: if (!drv->bs)
1.1.1.2 root 900: return 0;
901: ret = bdrv_media_changed(drv->bs);
902: if (ret) {
903: fd_revalidate(drv);
904: }
905: return ret;
906: }
907:
1.1 root 908: /* Digital input register : 0x07 (read-only) */
909: static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
910: {
911: uint32_t retval = 0;
912:
1.1.1.2 root 913: if (fdctrl_media_changed(drv0(fdctrl)) ||
1.1.1.3 ! root 914: fdctrl_media_changed(drv1(fdctrl)))
1.1 root 915: retval |= 0x80;
916: if (retval != 0)
917: FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
918:
919: return retval;
920: }
921:
922: /* FIFO state control */
923: static void fdctrl_reset_fifo (fdctrl_t *fdctrl)
924: {
925: fdctrl->data_dir = FD_DIR_WRITE;
926: fdctrl->data_pos = 0;
927: FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD);
928: }
929:
930: /* Set FIFO status for the host to read */
931: static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq)
932: {
933: fdctrl->data_dir = FD_DIR_READ;
934: fdctrl->data_len = fifo_len;
935: fdctrl->data_pos = 0;
936: FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS);
937: if (do_irq)
938: fdctrl_raise_irq(fdctrl, 0x00);
939: }
940:
941: /* Set an error: unimplemented/unknown command */
942: static void fdctrl_unimplemented (fdctrl_t *fdctrl)
943: {
944: #if 0
945: fdrive_t *cur_drv;
946:
947: cur_drv = get_cur_drv(fdctrl);
948: fdctrl->fifo[0] = 0x60 | (cur_drv->head << 2) | fdctrl->cur_drv;
949: fdctrl->fifo[1] = 0x00;
950: fdctrl->fifo[2] = 0x00;
951: fdctrl_set_fifo(fdctrl, 3, 1);
952: #else
953: // fdctrl_reset_fifo(fdctrl);
954: fdctrl->fifo[0] = 0x80;
955: fdctrl_set_fifo(fdctrl, 1, 0);
956: #endif
957: }
958:
959: /* Callback for transfer end (stop or abort) */
960: static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0,
1.1.1.3 ! root 961: uint8_t status1, uint8_t status2)
1.1 root 962: {
963: fdrive_t *cur_drv;
964:
965: cur_drv = get_cur_drv(fdctrl);
966: FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
967: status0, status1, status2,
968: status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
969: fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
970: fdctrl->fifo[1] = status1;
971: fdctrl->fifo[2] = status2;
972: fdctrl->fifo[3] = cur_drv->track;
973: fdctrl->fifo[4] = cur_drv->head;
974: fdctrl->fifo[5] = cur_drv->sect;
975: fdctrl->fifo[6] = FD_SECTOR_SC;
976: fdctrl->data_dir = FD_DIR_READ;
977: if (fdctrl->state & FD_CTRL_BUSY) {
978: DMA_release_DREQ(fdctrl->dma_chann);
979: fdctrl->state &= ~FD_CTRL_BUSY;
980: }
981: fdctrl_set_fifo(fdctrl, 7, 1);
982: }
983:
984: /* Prepare a data transfer (either DMA or FIFO) */
985: static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction)
986: {
987: fdrive_t *cur_drv;
988: uint8_t kh, kt, ks;
989: int did_seek;
990:
991: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
992: cur_drv = get_cur_drv(fdctrl);
993: kt = fdctrl->fifo[2];
994: kh = fdctrl->fifo[3];
995: ks = fdctrl->fifo[4];
996: FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
997: fdctrl->cur_drv, kh, kt, ks,
998: _fd_sector(kh, kt, ks, cur_drv->last_sect));
999: did_seek = 0;
1000: switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1001: case 2:
1002: /* sect too big */
1003: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1004: fdctrl->fifo[3] = kt;
1005: fdctrl->fifo[4] = kh;
1006: fdctrl->fifo[5] = ks;
1007: return;
1008: case 3:
1009: /* track too big */
1010: fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1011: fdctrl->fifo[3] = kt;
1012: fdctrl->fifo[4] = kh;
1013: fdctrl->fifo[5] = ks;
1014: return;
1015: case 4:
1016: /* No seek enabled */
1017: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1018: fdctrl->fifo[3] = kt;
1019: fdctrl->fifo[4] = kh;
1020: fdctrl->fifo[5] = ks;
1021: return;
1022: case 1:
1023: did_seek = 1;
1024: break;
1025: default:
1026: break;
1027: }
1028: /* Set the FIFO state */
1029: fdctrl->data_dir = direction;
1030: fdctrl->data_pos = 0;
1031: FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
1032: if (fdctrl->fifo[0] & 0x80)
1033: fdctrl->data_state |= FD_STATE_MULTI;
1034: else
1035: fdctrl->data_state &= ~FD_STATE_MULTI;
1036: if (did_seek)
1037: fdctrl->data_state |= FD_STATE_SEEK;
1038: else
1039: fdctrl->data_state &= ~FD_STATE_SEEK;
1040: if (fdctrl->fifo[5] == 00) {
1041: fdctrl->data_len = fdctrl->fifo[8];
1042: } else {
1.1.1.3 ! root 1043: int tmp;
1.1.1.2 root 1044: fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1.1 root 1045: tmp = (cur_drv->last_sect - ks + 1);
1046: if (fdctrl->fifo[0] & 0x80)
1047: tmp += cur_drv->last_sect;
1.1.1.3 ! root 1048: fdctrl->data_len *= tmp;
1.1 root 1049: }
1050: fdctrl->eot = fdctrl->fifo[6];
1051: if (fdctrl->dma_en) {
1052: int dma_mode;
1053: /* DMA transfer are enabled. Check if DMA channel is well programmed */
1054: dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1055: dma_mode = (dma_mode >> 2) & 3;
1056: FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1.1.1.3 ! root 1057: dma_mode, direction,
1.1 root 1058: (128 << fdctrl->fifo[5]) *
1.1.1.3 ! root 1059: (cur_drv->last_sect - ks + 1), fdctrl->data_len);
1.1 root 1060: if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
1061: direction == FD_DIR_SCANH) && dma_mode == 0) ||
1062: (direction == FD_DIR_WRITE && dma_mode == 2) ||
1063: (direction == FD_DIR_READ && dma_mode == 1)) {
1064: /* No access is allowed until DMA transfer has completed */
1065: fdctrl->state |= FD_CTRL_BUSY;
1066: /* Now, we just have to wait for the DMA controller to
1067: * recall us...
1068: */
1069: DMA_hold_DREQ(fdctrl->dma_chann);
1070: DMA_schedule(fdctrl->dma_chann);
1071: return;
1072: } else {
1.1.1.3 ! root 1073: FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1.1 root 1074: }
1075: }
1076: FLOPPY_DPRINTF("start non-DMA transfer\n");
1077: /* IO based transfer: calculate len */
1078: fdctrl_raise_irq(fdctrl, 0x00);
1079:
1080: return;
1081: }
1082:
1083: /* Prepare a transfer of deleted data */
1084: static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction)
1085: {
1086: /* We don't handle deleted data,
1087: * so we don't return *ANYTHING*
1088: */
1089: fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1090: }
1091:
1092: /* handlers for DMA transfers */
1093: static int fdctrl_transfer_handler (void *opaque, int nchan,
1094: int dma_pos, int dma_len)
1095: {
1096: fdctrl_t *fdctrl;
1097: fdrive_t *cur_drv;
1098: int len, start_pos, rel_pos;
1099: uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1100:
1101: fdctrl = opaque;
1102: if (!(fdctrl->state & FD_CTRL_BUSY)) {
1103: FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1104: return 0;
1105: }
1106: cur_drv = get_cur_drv(fdctrl);
1107: if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
1108: fdctrl->data_dir == FD_DIR_SCANH)
1109: status2 = 0x04;
1110: if (dma_len > fdctrl->data_len)
1111: dma_len = fdctrl->data_len;
1112: if (cur_drv->bs == NULL) {
1.1.1.3 ! root 1113: if (fdctrl->data_dir == FD_DIR_WRITE)
! 1114: fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
! 1115: else
! 1116: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
! 1117: len = 0;
1.1 root 1118: goto transfer_error;
1119: }
1120: rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1121: for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1122: len = dma_len - fdctrl->data_pos;
1123: if (len + rel_pos > FD_SECTOR_LEN)
1124: len = FD_SECTOR_LEN - rel_pos;
1125: FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1126: "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1127: fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
1128: cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1129: fd_sector(cur_drv) * 512);
1130: if (fdctrl->data_dir != FD_DIR_WRITE ||
1.1.1.3 ! root 1131: len < FD_SECTOR_LEN || rel_pos != 0) {
1.1 root 1132: /* READ & SCAN commands and realign to a sector for WRITE */
1133: if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1.1.1.3 ! root 1134: fdctrl->fifo, 1) < 0) {
1.1 root 1135: FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1136: fd_sector(cur_drv));
1137: /* Sure, image size is too small... */
1138: memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1139: }
1140: }
1.1.1.3 ! root 1141: switch (fdctrl->data_dir) {
! 1142: case FD_DIR_READ:
! 1143: /* READ commands */
1.1 root 1144: DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1145: fdctrl->data_pos, len);
1.1.1.3 ! root 1146: break;
! 1147: case FD_DIR_WRITE:
1.1 root 1148: /* WRITE commands */
1149: DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1150: fdctrl->data_pos, len);
1151: if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1.1.1.3 ! root 1152: fdctrl->fifo, 1) < 0) {
1.1 root 1153: FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
1154: fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1155: goto transfer_error;
1156: }
1.1.1.3 ! root 1157: break;
! 1158: default:
! 1159: /* SCAN commands */
1.1 root 1160: {
1.1.1.3 ! root 1161: uint8_t tmpbuf[FD_SECTOR_LEN];
1.1 root 1162: int ret;
1163: DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1164: ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1165: if (ret == 0) {
1166: status2 = 0x08;
1167: goto end_transfer;
1168: }
1169: if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
1170: (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1171: status2 = 0x00;
1172: goto end_transfer;
1173: }
1174: }
1.1.1.3 ! root 1175: break;
1.1 root 1176: }
1.1.1.3 ! root 1177: fdctrl->data_pos += len;
! 1178: rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1.1 root 1179: if (rel_pos == 0) {
1180: /* Seek to next sector */
1.1.1.3 ! root 1181: FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d) (%d)\n",
! 1182: cur_drv->head, cur_drv->track, cur_drv->sect,
! 1183: fd_sector(cur_drv),
! 1184: fdctrl->data_pos - len);
1.1 root 1185: /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1186: error in fact */
1187: if (cur_drv->sect >= cur_drv->last_sect ||
1188: cur_drv->sect == fdctrl->eot) {
1.1.1.3 ! root 1189: cur_drv->sect = 1;
! 1190: if (FD_MULTI_TRACK(fdctrl->data_state)) {
! 1191: if (cur_drv->head == 0 &&
! 1192: (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1.1 root 1193: cur_drv->head = 1;
1194: } else {
1195: cur_drv->head = 0;
1.1.1.3 ! root 1196: cur_drv->track++;
! 1197: if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
! 1198: break;
1.1 root 1199: }
1200: } else {
1201: cur_drv->track++;
1202: break;
1203: }
1.1.1.3 ! root 1204: FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
! 1205: cur_drv->head, cur_drv->track,
! 1206: cur_drv->sect, fd_sector(cur_drv));
1.1 root 1207: } else {
1208: cur_drv->sect++;
1209: }
1210: }
1211: }
1.1.1.3 ! root 1212: end_transfer:
1.1 root 1213: len = fdctrl->data_pos - start_pos;
1214: FLOPPY_DPRINTF("end transfer %d %d %d\n",
1.1.1.3 ! root 1215: fdctrl->data_pos, len, fdctrl->data_len);
1.1 root 1216: if (fdctrl->data_dir == FD_DIR_SCANE ||
1217: fdctrl->data_dir == FD_DIR_SCANL ||
1218: fdctrl->data_dir == FD_DIR_SCANH)
1219: status2 = 0x08;
1220: if (FD_DID_SEEK(fdctrl->data_state))
1221: status0 |= 0x20;
1222: fdctrl->data_len -= len;
1223: // if (fdctrl->data_len == 0)
1224: fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1.1.1.3 ! root 1225: transfer_error:
1.1 root 1226:
1227: return len;
1228: }
1229:
1230: /* Data register : 0x05 */
1231: static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
1232: {
1233: fdrive_t *cur_drv;
1234: uint32_t retval = 0;
1235: int pos, len;
1236:
1237: cur_drv = get_cur_drv(fdctrl);
1238: fdctrl->state &= ~FD_CTRL_SLEEP;
1239: if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
1240: FLOPPY_ERROR("can't read data in CMD state\n");
1241: return 0;
1242: }
1243: pos = fdctrl->data_pos;
1244: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1245: pos %= FD_SECTOR_LEN;
1246: if (pos == 0) {
1247: len = fdctrl->data_len - fdctrl->data_pos;
1248: if (len > FD_SECTOR_LEN)
1249: len = FD_SECTOR_LEN;
1.1.1.3 ! root 1250: bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1.1 root 1251: }
1252: }
1253: retval = fdctrl->fifo[pos];
1254: if (++fdctrl->data_pos == fdctrl->data_len) {
1255: fdctrl->data_pos = 0;
1256: /* Switch from transfer mode to status mode
1257: * then from status mode to command mode
1258: */
1259: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1260: fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1261: } else {
1262: fdctrl_reset_fifo(fdctrl);
1263: fdctrl_reset_irq(fdctrl);
1264: }
1265: }
1266: FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1267:
1268: return retval;
1269: }
1270:
1271: static void fdctrl_format_sector (fdctrl_t *fdctrl)
1272: {
1273: fdrive_t *cur_drv;
1274: uint8_t kh, kt, ks;
1275: int did_seek;
1276:
1277: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1278: cur_drv = get_cur_drv(fdctrl);
1279: kt = fdctrl->fifo[6];
1280: kh = fdctrl->fifo[7];
1281: ks = fdctrl->fifo[8];
1282: FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1283: fdctrl->cur_drv, kh, kt, ks,
1284: _fd_sector(kh, kt, ks, cur_drv->last_sect));
1285: did_seek = 0;
1286: switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) {
1287: case 2:
1288: /* sect too big */
1289: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1290: fdctrl->fifo[3] = kt;
1291: fdctrl->fifo[4] = kh;
1292: fdctrl->fifo[5] = ks;
1293: return;
1294: case 3:
1295: /* track too big */
1296: fdctrl_stop_transfer(fdctrl, 0x40, 0x80, 0x00);
1297: fdctrl->fifo[3] = kt;
1298: fdctrl->fifo[4] = kh;
1299: fdctrl->fifo[5] = ks;
1300: return;
1301: case 4:
1302: /* No seek enabled */
1303: fdctrl_stop_transfer(fdctrl, 0x40, 0x00, 0x00);
1304: fdctrl->fifo[3] = kt;
1305: fdctrl->fifo[4] = kh;
1306: fdctrl->fifo[5] = ks;
1307: return;
1308: case 1:
1309: did_seek = 1;
1310: fdctrl->data_state |= FD_STATE_SEEK;
1311: break;
1312: default:
1313: break;
1314: }
1315: memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1316: if (cur_drv->bs == NULL ||
1317: bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1.1.1.3 ! root 1318: FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1.1 root 1319: fdctrl_stop_transfer(fdctrl, 0x60, 0x00, 0x00);
1320: } else {
1.1.1.3 ! root 1321: if (cur_drv->sect == cur_drv->last_sect) {
! 1322: fdctrl->data_state &= ~FD_STATE_FORMAT;
! 1323: /* Last sector done */
! 1324: if (FD_DID_SEEK(fdctrl->data_state))
! 1325: fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
! 1326: else
! 1327: fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
! 1328: } else {
! 1329: /* More to do */
! 1330: fdctrl->data_pos = 0;
! 1331: fdctrl->data_len = 4;
! 1332: }
1.1 root 1333: }
1334: }
1335:
1336: static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value)
1337: {
1338: fdrive_t *cur_drv;
1339:
1340: cur_drv = get_cur_drv(fdctrl);
1341: /* Reset mode */
1342: if (fdctrl->state & FD_CTRL_RESET) {
1343: FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1344: return;
1345: }
1346: fdctrl->state &= ~FD_CTRL_SLEEP;
1347: if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
1348: FLOPPY_ERROR("can't write data in status mode\n");
1349: return;
1350: }
1351: /* Is it write command time ? */
1352: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
1353: /* FIFO data write */
1354: fdctrl->fifo[fdctrl->data_pos++] = value;
1355: if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
1356: fdctrl->data_pos == fdctrl->data_len) {
1.1.1.3 ! root 1357: bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
1.1 root 1358: }
1359: /* Switch from transfer mode to status mode
1360: * then from status mode to command mode
1361: */
1362: if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
1363: fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1364: return;
1365: }
1366: if (fdctrl->data_pos == 0) {
1367: /* Command */
1368: switch (value & 0x5F) {
1369: case 0x46:
1370: /* READ variants */
1371: FLOPPY_DPRINTF("READ command\n");
1372: /* 8 parameters cmd */
1373: fdctrl->data_len = 9;
1374: goto enqueue;
1375: case 0x4C:
1376: /* READ_DELETED variants */
1377: FLOPPY_DPRINTF("READ_DELETED command\n");
1378: /* 8 parameters cmd */
1379: fdctrl->data_len = 9;
1380: goto enqueue;
1381: case 0x50:
1382: /* SCAN_EQUAL variants */
1383: FLOPPY_DPRINTF("SCAN_EQUAL command\n");
1384: /* 8 parameters cmd */
1385: fdctrl->data_len = 9;
1386: goto enqueue;
1387: case 0x56:
1388: /* VERIFY variants */
1389: FLOPPY_DPRINTF("VERIFY command\n");
1390: /* 8 parameters cmd */
1391: fdctrl->data_len = 9;
1392: goto enqueue;
1393: case 0x59:
1394: /* SCAN_LOW_OR_EQUAL variants */
1395: FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
1396: /* 8 parameters cmd */
1397: fdctrl->data_len = 9;
1398: goto enqueue;
1399: case 0x5D:
1400: /* SCAN_HIGH_OR_EQUAL variants */
1401: FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
1402: /* 8 parameters cmd */
1403: fdctrl->data_len = 9;
1404: goto enqueue;
1405: default:
1406: break;
1407: }
1408: switch (value & 0x7F) {
1409: case 0x45:
1410: /* WRITE variants */
1411: FLOPPY_DPRINTF("WRITE command\n");
1412: /* 8 parameters cmd */
1413: fdctrl->data_len = 9;
1414: goto enqueue;
1415: case 0x49:
1416: /* WRITE_DELETED variants */
1417: FLOPPY_DPRINTF("WRITE_DELETED command\n");
1418: /* 8 parameters cmd */
1419: fdctrl->data_len = 9;
1420: goto enqueue;
1421: default:
1422: break;
1423: }
1424: switch (value) {
1425: case 0x03:
1426: /* SPECIFY */
1427: FLOPPY_DPRINTF("SPECIFY command\n");
1428: /* 1 parameter cmd */
1429: fdctrl->data_len = 3;
1430: goto enqueue;
1431: case 0x04:
1432: /* SENSE_DRIVE_STATUS */
1433: FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
1434: /* 1 parameter cmd */
1435: fdctrl->data_len = 2;
1436: goto enqueue;
1437: case 0x07:
1438: /* RECALIBRATE */
1439: FLOPPY_DPRINTF("RECALIBRATE command\n");
1440: /* 1 parameter cmd */
1441: fdctrl->data_len = 2;
1442: goto enqueue;
1443: case 0x08:
1444: /* SENSE_INTERRUPT_STATUS */
1445: FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
1446: fdctrl->int_status);
1447: /* No parameters cmd: returns status if no interrupt */
1448: #if 0
1449: fdctrl->fifo[0] =
1450: fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
1451: #else
1452: /* XXX: int_status handling is broken for read/write
1453: commands, so we do this hack. It should be suppressed
1454: ASAP */
1455: fdctrl->fifo[0] =
1456: 0x20 | (cur_drv->head << 2) | fdctrl->cur_drv;
1457: #endif
1458: fdctrl->fifo[1] = cur_drv->track;
1459: fdctrl_set_fifo(fdctrl, 2, 0);
1.1.1.3 ! root 1460: fdctrl_reset_irq(fdctrl);
! 1461: fdctrl->int_status = 0xC0;
1.1 root 1462: return;
1463: case 0x0E:
1464: /* DUMPREG */
1465: FLOPPY_DPRINTF("DUMPREG command\n");
1466: /* Drives position */
1467: fdctrl->fifo[0] = drv0(fdctrl)->track;
1468: fdctrl->fifo[1] = drv1(fdctrl)->track;
1469: fdctrl->fifo[2] = 0;
1470: fdctrl->fifo[3] = 0;
1471: /* timers */
1472: fdctrl->fifo[4] = fdctrl->timer0;
1473: fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en;
1474: fdctrl->fifo[6] = cur_drv->last_sect;
1475: fdctrl->fifo[7] = (fdctrl->lock << 7) |
1.1.1.3 ! root 1476: (cur_drv->perpendicular << 2);
1.1 root 1477: fdctrl->fifo[8] = fdctrl->config;
1478: fdctrl->fifo[9] = fdctrl->precomp_trk;
1479: fdctrl_set_fifo(fdctrl, 10, 0);
1480: return;
1481: case 0x0F:
1482: /* SEEK */
1483: FLOPPY_DPRINTF("SEEK command\n");
1484: /* 2 parameters cmd */
1485: fdctrl->data_len = 3;
1486: goto enqueue;
1487: case 0x10:
1488: /* VERSION */
1489: FLOPPY_DPRINTF("VERSION command\n");
1490: /* No parameters cmd */
1491: /* Controller's version */
1492: fdctrl->fifo[0] = fdctrl->version;
1493: fdctrl_set_fifo(fdctrl, 1, 1);
1494: return;
1495: case 0x12:
1496: /* PERPENDICULAR_MODE */
1497: FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
1498: /* 1 parameter cmd */
1499: fdctrl->data_len = 2;
1500: goto enqueue;
1501: case 0x13:
1502: /* CONFIGURE */
1503: FLOPPY_DPRINTF("CONFIGURE command\n");
1504: /* 3 parameters cmd */
1505: fdctrl->data_len = 4;
1506: goto enqueue;
1507: case 0x14:
1508: /* UNLOCK */
1509: FLOPPY_DPRINTF("UNLOCK command\n");
1510: /* No parameters cmd */
1511: fdctrl->lock = 0;
1512: fdctrl->fifo[0] = 0;
1513: fdctrl_set_fifo(fdctrl, 1, 0);
1514: return;
1515: case 0x17:
1516: /* POWERDOWN_MODE */
1517: FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
1518: /* 2 parameters cmd */
1519: fdctrl->data_len = 3;
1520: goto enqueue;
1521: case 0x18:
1522: /* PART_ID */
1523: FLOPPY_DPRINTF("PART_ID command\n");
1524: /* No parameters cmd */
1525: fdctrl->fifo[0] = 0x41; /* Stepping 1 */
1526: fdctrl_set_fifo(fdctrl, 1, 0);
1527: return;
1528: case 0x2C:
1529: /* SAVE */
1530: FLOPPY_DPRINTF("SAVE command\n");
1531: /* No parameters cmd */
1532: fdctrl->fifo[0] = 0;
1533: fdctrl->fifo[1] = 0;
1534: /* Drives position */
1535: fdctrl->fifo[2] = drv0(fdctrl)->track;
1536: fdctrl->fifo[3] = drv1(fdctrl)->track;
1537: fdctrl->fifo[4] = 0;
1538: fdctrl->fifo[5] = 0;
1539: /* timers */
1540: fdctrl->fifo[6] = fdctrl->timer0;
1541: fdctrl->fifo[7] = fdctrl->timer1;
1542: fdctrl->fifo[8] = cur_drv->last_sect;
1543: fdctrl->fifo[9] = (fdctrl->lock << 7) |
1.1.1.3 ! root 1544: (cur_drv->perpendicular << 2);
1.1 root 1545: fdctrl->fifo[10] = fdctrl->config;
1546: fdctrl->fifo[11] = fdctrl->precomp_trk;
1547: fdctrl->fifo[12] = fdctrl->pwrd;
1548: fdctrl->fifo[13] = 0;
1549: fdctrl->fifo[14] = 0;
1550: fdctrl_set_fifo(fdctrl, 15, 1);
1551: return;
1552: case 0x33:
1553: /* OPTION */
1554: FLOPPY_DPRINTF("OPTION command\n");
1555: /* 1 parameter cmd */
1556: fdctrl->data_len = 2;
1557: goto enqueue;
1558: case 0x42:
1559: /* READ_TRACK */
1560: FLOPPY_DPRINTF("READ_TRACK command\n");
1561: /* 8 parameters cmd */
1562: fdctrl->data_len = 9;
1563: goto enqueue;
1564: case 0x4A:
1565: /* READ_ID */
1566: FLOPPY_DPRINTF("READ_ID command\n");
1567: /* 1 parameter cmd */
1568: fdctrl->data_len = 2;
1569: goto enqueue;
1570: case 0x4C:
1571: /* RESTORE */
1572: FLOPPY_DPRINTF("RESTORE command\n");
1573: /* 17 parameters cmd */
1574: fdctrl->data_len = 18;
1575: goto enqueue;
1576: case 0x4D:
1577: /* FORMAT_TRACK */
1578: FLOPPY_DPRINTF("FORMAT_TRACK command\n");
1579: /* 5 parameters cmd */
1580: fdctrl->data_len = 6;
1581: goto enqueue;
1582: case 0x8E:
1583: /* DRIVE_SPECIFICATION_COMMAND */
1584: FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
1585: /* 5 parameters cmd */
1586: fdctrl->data_len = 6;
1587: goto enqueue;
1588: case 0x8F:
1589: /* RELATIVE_SEEK_OUT */
1590: FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
1591: /* 2 parameters cmd */
1592: fdctrl->data_len = 3;
1593: goto enqueue;
1594: case 0x94:
1595: /* LOCK */
1596: FLOPPY_DPRINTF("LOCK command\n");
1597: /* No parameters cmd */
1598: fdctrl->lock = 1;
1599: fdctrl->fifo[0] = 0x10;
1600: fdctrl_set_fifo(fdctrl, 1, 1);
1601: return;
1602: case 0xCD:
1603: /* FORMAT_AND_WRITE */
1604: FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
1605: /* 10 parameters cmd */
1606: fdctrl->data_len = 11;
1607: goto enqueue;
1608: case 0xCF:
1609: /* RELATIVE_SEEK_IN */
1610: FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
1611: /* 2 parameters cmd */
1612: fdctrl->data_len = 3;
1613: goto enqueue;
1614: default:
1615: /* Unknown command */
1616: FLOPPY_ERROR("unknown command: 0x%02x\n", value);
1617: fdctrl_unimplemented(fdctrl);
1618: return;
1619: }
1620: }
1.1.1.3 ! root 1621: enqueue:
1.1 root 1622: FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
1623: fdctrl->fifo[fdctrl->data_pos] = value;
1624: if (++fdctrl->data_pos == fdctrl->data_len) {
1625: /* We now have all parameters
1626: * and will be able to treat the command
1627: */
1.1.1.3 ! root 1628: if (fdctrl->data_state & FD_STATE_FORMAT) {
! 1629: fdctrl_format_sector(fdctrl);
1.1 root 1630: return;
1631: }
1.1.1.3 ! root 1632: switch (fdctrl->fifo[0] & 0x1F) {
! 1633: case 0x06:
! 1634: {
! 1635: /* READ variants */
! 1636: FLOPPY_DPRINTF("treat READ command\n");
! 1637: fdctrl_start_transfer(fdctrl, FD_DIR_READ);
! 1638: return;
! 1639: }
1.1 root 1640: case 0x0C:
1641: /* READ_DELETED variants */
1642: // FLOPPY_DPRINTF("treat READ_DELETED command\n");
1643: FLOPPY_ERROR("treat READ_DELETED command\n");
1644: fdctrl_start_transfer_del(fdctrl, FD_DIR_READ);
1645: return;
1646: case 0x16:
1647: /* VERIFY variants */
1648: // FLOPPY_DPRINTF("treat VERIFY command\n");
1649: FLOPPY_ERROR("treat VERIFY command\n");
1650: fdctrl_stop_transfer(fdctrl, 0x20, 0x00, 0x00);
1651: return;
1652: case 0x10:
1653: /* SCAN_EQUAL variants */
1654: // FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
1655: FLOPPY_ERROR("treat SCAN_EQUAL command\n");
1656: fdctrl_start_transfer(fdctrl, FD_DIR_SCANE);
1657: return;
1658: case 0x19:
1659: /* SCAN_LOW_OR_EQUAL variants */
1660: // FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
1661: FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
1662: fdctrl_start_transfer(fdctrl, FD_DIR_SCANL);
1663: return;
1664: case 0x1D:
1665: /* SCAN_HIGH_OR_EQUAL variants */
1666: // FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
1667: FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
1668: fdctrl_start_transfer(fdctrl, FD_DIR_SCANH);
1669: return;
1670: default:
1671: break;
1672: }
1673: switch (fdctrl->fifo[0] & 0x3F) {
1674: case 0x05:
1675: /* WRITE variants */
1676: FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl->fifo[0]);
1677: fdctrl_start_transfer(fdctrl, FD_DIR_WRITE);
1678: return;
1679: case 0x09:
1680: /* WRITE_DELETED variants */
1681: // FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
1682: FLOPPY_ERROR("treat WRITE_DELETED command\n");
1683: fdctrl_start_transfer_del(fdctrl, FD_DIR_WRITE);
1684: return;
1685: default:
1686: break;
1687: }
1688: switch (fdctrl->fifo[0]) {
1689: case 0x03:
1690: /* SPECIFY */
1691: FLOPPY_DPRINTF("treat SPECIFY command\n");
1692: fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
1693: fdctrl->timer1 = fdctrl->fifo[2] >> 1;
1.1.1.3 ! root 1694: fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ;
1.1 root 1695: /* No result back */
1696: fdctrl_reset_fifo(fdctrl);
1697: break;
1698: case 0x04:
1699: /* SENSE_DRIVE_STATUS */
1700: FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
1701: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1.1.1.3 ! root 1702: cur_drv = get_cur_drv(fdctrl);
1.1 root 1703: cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1704: /* 1 Byte status back */
1705: fdctrl->fifo[0] = (cur_drv->ro << 6) |
1706: (cur_drv->track == 0 ? 0x10 : 0x00) |
1707: (cur_drv->head << 2) |
1708: fdctrl->cur_drv |
1709: 0x28;
1710: fdctrl_set_fifo(fdctrl, 1, 0);
1711: break;
1712: case 0x07:
1713: /* RECALIBRATE */
1714: FLOPPY_DPRINTF("treat RECALIBRATE command\n");
1715: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1.1.1.3 ! root 1716: cur_drv = get_cur_drv(fdctrl);
1.1 root 1717: fd_recalibrate(cur_drv);
1.1.1.3 ! root 1718: fdctrl_reset_fifo(fdctrl);
1.1 root 1719: /* Raise Interrupt */
1.1.1.3 ! root 1720: fdctrl_raise_irq(fdctrl, 0x20);
1.1 root 1721: break;
1722: case 0x0F:
1723: /* SEEK */
1724: FLOPPY_DPRINTF("treat SEEK command\n");
1725: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1.1.1.3 ! root 1726: cur_drv = get_cur_drv(fdctrl);
! 1727: fd_start(cur_drv);
1.1 root 1728: if (fdctrl->fifo[2] <= cur_drv->track)
1729: cur_drv->dir = 1;
1730: else
1731: cur_drv->dir = 0;
1.1.1.3 ! root 1732: fdctrl_reset_fifo(fdctrl);
1.1 root 1733: if (fdctrl->fifo[2] > cur_drv->max_track) {
1734: fdctrl_raise_irq(fdctrl, 0x60);
1735: } else {
1736: cur_drv->track = fdctrl->fifo[2];
1737: /* Raise Interrupt */
1738: fdctrl_raise_irq(fdctrl, 0x20);
1739: }
1740: break;
1741: case 0x12:
1742: /* PERPENDICULAR_MODE */
1743: FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
1744: if (fdctrl->fifo[1] & 0x80)
1745: cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
1746: /* No result back */
1747: fdctrl_reset_fifo(fdctrl);
1748: break;
1749: case 0x13:
1750: /* CONFIGURE */
1751: FLOPPY_DPRINTF("treat CONFIGURE command\n");
1752: fdctrl->config = fdctrl->fifo[2];
1753: fdctrl->precomp_trk = fdctrl->fifo[3];
1754: /* No result back */
1755: fdctrl_reset_fifo(fdctrl);
1756: break;
1757: case 0x17:
1758: /* POWERDOWN_MODE */
1759: FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
1760: fdctrl->pwrd = fdctrl->fifo[1];
1761: fdctrl->fifo[0] = fdctrl->fifo[1];
1762: fdctrl_set_fifo(fdctrl, 1, 1);
1763: break;
1764: case 0x33:
1765: /* OPTION */
1766: FLOPPY_DPRINTF("treat OPTION command\n");
1767: /* No result back */
1768: fdctrl_reset_fifo(fdctrl);
1769: break;
1770: case 0x42:
1771: /* READ_TRACK */
1772: // FLOPPY_DPRINTF("treat READ_TRACK command\n");
1773: FLOPPY_ERROR("treat READ_TRACK command\n");
1774: fdctrl_start_transfer(fdctrl, FD_DIR_READ);
1775: break;
1776: case 0x4A:
1.1.1.3 ! root 1777: /* READ_ID */
1.1 root 1778: FLOPPY_DPRINTF("treat READ_ID command\n");
1779: /* XXX: should set main status register to busy */
1780: cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
1.1.1.3 ! root 1781: qemu_mod_timer(fdctrl->result_timer,
1.1 root 1782: qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
1783: break;
1784: case 0x4C:
1785: /* RESTORE */
1786: FLOPPY_DPRINTF("treat RESTORE command\n");
1787: /* Drives position */
1788: drv0(fdctrl)->track = fdctrl->fifo[3];
1789: drv1(fdctrl)->track = fdctrl->fifo[4];
1790: /* timers */
1791: fdctrl->timer0 = fdctrl->fifo[7];
1792: fdctrl->timer1 = fdctrl->fifo[8];
1793: cur_drv->last_sect = fdctrl->fifo[9];
1794: fdctrl->lock = fdctrl->fifo[10] >> 7;
1795: cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1796: fdctrl->config = fdctrl->fifo[11];
1797: fdctrl->precomp_trk = fdctrl->fifo[12];
1798: fdctrl->pwrd = fdctrl->fifo[13];
1799: fdctrl_reset_fifo(fdctrl);
1800: break;
1801: case 0x4D:
1802: /* FORMAT_TRACK */
1.1.1.3 ! root 1803: FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
! 1804: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
! 1805: cur_drv = get_cur_drv(fdctrl);
! 1806: fdctrl->data_state |= FD_STATE_FORMAT;
! 1807: if (fdctrl->fifo[0] & 0x80)
! 1808: fdctrl->data_state |= FD_STATE_MULTI;
! 1809: else
! 1810: fdctrl->data_state &= ~FD_STATE_MULTI;
! 1811: fdctrl->data_state &= ~FD_STATE_SEEK;
! 1812: cur_drv->bps =
! 1813: fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
1.1 root 1814: #if 0
1.1.1.3 ! root 1815: cur_drv->last_sect =
! 1816: cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
! 1817: fdctrl->fifo[3] / 2;
1.1 root 1818: #else
1.1.1.3 ! root 1819: cur_drv->last_sect = fdctrl->fifo[3];
1.1 root 1820: #endif
1.1.1.3 ! root 1821: /* TODO: implement format using DMA expected by the Bochs BIOS
! 1822: * and Linux fdformat (read 3 bytes per sector via DMA and fill
! 1823: * the sector with the specified fill byte
! 1824: */
! 1825: fdctrl->data_state &= ~FD_STATE_FORMAT;
! 1826: fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1.1 root 1827: break;
1828: case 0x8E:
1829: /* DRIVE_SPECIFICATION_COMMAND */
1830: FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
1831: if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
1832: /* Command parameters done */
1833: if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
1834: fdctrl->fifo[0] = fdctrl->fifo[1];
1835: fdctrl->fifo[2] = 0;
1836: fdctrl->fifo[3] = 0;
1837: fdctrl_set_fifo(fdctrl, 4, 1);
1838: } else {
1839: fdctrl_reset_fifo(fdctrl);
1840: }
1841: } else if (fdctrl->data_len > 7) {
1842: /* ERROR */
1843: fdctrl->fifo[0] = 0x80 |
1844: (cur_drv->head << 2) | fdctrl->cur_drv;
1845: fdctrl_set_fifo(fdctrl, 1, 1);
1846: }
1847: break;
1848: case 0x8F:
1849: /* RELATIVE_SEEK_OUT */
1850: FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
1851: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1.1.1.3 ! root 1852: cur_drv = get_cur_drv(fdctrl);
! 1853: fd_start(cur_drv);
! 1854: cur_drv->dir = 0;
1.1 root 1855: if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
1.1.1.3 ! root 1856: cur_drv->track = cur_drv->max_track - 1;
1.1 root 1857: } else {
1858: cur_drv->track += fdctrl->fifo[2];
1859: }
1.1.1.3 ! root 1860: fdctrl_reset_fifo(fdctrl);
! 1861: fdctrl_raise_irq(fdctrl, 0x20);
1.1 root 1862: break;
1863: case 0xCD:
1864: /* FORMAT_AND_WRITE */
1865: // FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
1866: FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
1867: fdctrl_unimplemented(fdctrl);
1868: break;
1869: case 0xCF:
1.1.1.3 ! root 1870: /* RELATIVE_SEEK_IN */
1.1 root 1871: FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
1872: fdctrl->cur_drv = fdctrl->fifo[1] & 1;
1.1.1.3 ! root 1873: cur_drv = get_cur_drv(fdctrl);
! 1874: fd_start(cur_drv);
! 1875: cur_drv->dir = 1;
1.1 root 1876: if (fdctrl->fifo[2] > cur_drv->track) {
1.1.1.3 ! root 1877: cur_drv->track = 0;
1.1 root 1878: } else {
1879: cur_drv->track -= fdctrl->fifo[2];
1880: }
1.1.1.3 ! root 1881: fdctrl_reset_fifo(fdctrl);
! 1882: /* Raise Interrupt */
! 1883: fdctrl_raise_irq(fdctrl, 0x20);
1.1 root 1884: break;
1885: }
1886: }
1887: }
1888:
1889: static void fdctrl_result_timer(void *opaque)
1890: {
1891: fdctrl_t *fdctrl = opaque;
1.1.1.3 ! root 1892: fdrive_t *cur_drv = get_cur_drv(fdctrl);
! 1893:
! 1894: /* Pretend we are spinning.
! 1895: * This is needed for Coherent, which uses READ ID to check for
! 1896: * sector interleaving.
! 1897: */
! 1898: if (cur_drv->last_sect != 0) {
! 1899: cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
! 1900: }
1.1 root 1901: fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1902: }
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