Commit | Line | Data |
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32f56e31 BJ |
1 | #include "fd.h" |
2 | #if NFD > 0 | |
7ff33365 DA |
3 | /*- |
4 | * Copyright (c) 1990 The Regents of the University of California. | |
5 | * All rights reserved. | |
6 | * | |
7 | * This code is derived from software contributed to Berkeley by | |
8 | * Don Ahn. | |
9 | * | |
10 | * %sccs.include.386.c% | |
11 | * | |
32f56e31 | 12 | * @(#)fd.c 5.2 (Berkeley) %G% |
7ff33365 DA |
13 | */ |
14 | ||
15 | /****************************************************************************/ | |
16 | /* fd driver */ | |
17 | /****************************************************************************/ | |
18 | #include "param.h" | |
19 | #include "dkbad.h" | |
20 | #include "systm.h" | |
21 | #include "conf.h" | |
22 | #include "file.h" | |
23 | #include "dir.h" | |
24 | #include "user.h" | |
25 | #include "ioctl.h" | |
26 | #include "disk.h" | |
27 | #include "buf.h" | |
28 | #include "vm.h" | |
29 | #include "uio.h" | |
30 | #include "machine/pte.h" | |
32f56e31 BJ |
31 | #include "machine/isa/device.h" |
32 | #include "machine/isa/fdreg.h" | |
7ff33365 DA |
33 | #include "icu.h" |
34 | ||
7ff33365 DA |
35 | #define FDUNIT(s) ((s)&1) |
36 | #define FDTYPE(s) (((s)>>1)&7) | |
32f56e31 | 37 | |
7ff33365 | 38 | #define b_cylin b_resid |
32f56e31 | 39 | #define b_step b_resid |
7ff33365 DA |
40 | #define FDBLK 512 |
41 | #define NUMTYPES 4 | |
42 | ||
43 | struct fd_type { | |
44 | int sectrac; /* sectors per track */ | |
45 | int secsize; /* size code for sectors */ | |
46 | int datalen; /* data len when secsize = 0 */ | |
47 | int gap; /* gap len between sectors */ | |
48 | int tracks; /* total num of tracks */ | |
49 | int size; /* size of disk in sectors */ | |
50 | int steptrac; /* steps per cylinder */ | |
51 | int trans; /* transfer speed code */ | |
52 | }; | |
53 | ||
54 | struct fd_type fd_types[NUMTYPES] = { | |
32f56e31 | 55 | { 18,2,0xFF,0x1B,80,2880,1,0 }, /* 1.44 meg HD 3.5in floppy */ |
7ff33365 DA |
56 | { 15,2,0xFF,0x1B,80,2400,1,0 }, /* 1.2 meg HD floppy */ |
57 | { 9,2,0xFF,0x23,40,720,2,1 }, /* 360k floppy in 1.2meg drive */ | |
58 | { 9,2,0xFF,0x2A,40,720,1,1 }, /* 360k floppy in DD drive */ | |
59 | }; | |
60 | ||
61 | struct fd_u { | |
62 | int type; /* Drive type (HD, DD */ | |
63 | int active; /* Drive activity boolean */ | |
64 | int motor; /* Motor on flag */ | |
7ff33365 DA |
65 | struct buf head; /* Head of buf chain */ |
66 | struct buf rhead; /* Raw head of buf chain */ | |
32f56e31 | 67 | int reset; |
7ff33365 DA |
68 | } fd_unit[NFD]; |
69 | ||
32f56e31 | 70 | |
7ff33365 DA |
71 | extern int hz; |
72 | ||
73 | /* state needed for current transfer */ | |
32f56e31 BJ |
74 | static fdc; /* floppy disk controller io base register */ |
75 | int fd_dmachan = 2; | |
7ff33365 DA |
76 | static int fd_skip; |
77 | static int fd_state; | |
78 | static int fd_retry; | |
79 | static int fd_drive; | |
32f56e31 | 80 | static int fd_track = -1; |
7ff33365 | 81 | static int fd_status[7]; |
7ff33365 | 82 | |
32f56e31 BJ |
83 | /* |
84 | make sure bounce buffer for DMA is aligned since the DMA chip | |
85 | doesn't roll over properly over a 64k boundary | |
86 | */ | |
87 | extern struct buf *dma_bounce[]; | |
7ff33365 DA |
88 | |
89 | /****************************************************************************/ | |
90 | /* autoconfiguration stuff */ | |
91 | /****************************************************************************/ | |
92 | int fdprobe(), fdattach(), fd_turnoff(); | |
93 | ||
32f56e31 | 94 | struct isa_driver fddriver = { |
7ff33365 DA |
95 | fdprobe, fdattach, "fd", |
96 | }; | |
97 | ||
98 | fdprobe(dev) | |
32f56e31 | 99 | struct isa_device *dev; |
7ff33365 DA |
100 | { |
101 | return 1; | |
102 | } | |
103 | ||
104 | fdattach(dev) | |
32f56e31 BJ |
105 | struct isa_device *dev; |
106 | { int s; | |
107 | ||
108 | fdc = dev->id_iobase; | |
109 | /* Set transfer to 500kbps */ | |
110 | outb(fdc+fdctl,0); | |
111 | fd_turnoff(0); | |
112 | } | |
113 | ||
114 | int | |
115 | fdsize(dev) | |
116 | dev_t dev; | |
7ff33365 | 117 | { |
32f56e31 | 118 | return(2400); |
7ff33365 DA |
119 | } |
120 | ||
121 | /****************************************************************************/ | |
122 | /* fdstrategy */ | |
123 | /****************************************************************************/ | |
124 | fdstrategy(bp) | |
125 | register struct buf *bp; /* IO operation to perform */ | |
126 | { | |
127 | register struct buf *dp,*dp0,*dp1; | |
128 | long nblocks,blknum; | |
32f56e31 | 129 | int unit, type, s; |
7ff33365 | 130 | |
32f56e31 BJ |
131 | unit = FDUNIT(minor(bp->b_dev)); |
132 | type = FDTYPE(minor(bp->b_dev)); | |
133 | ||
134 | #ifdef FDTEST | |
135 | printf("fdstrat%d, blk = %d, bcount = %d, addr = %x|", | |
136 | unit, bp->b_blkno, bp->b_bcount,bp->b_un.b_addr); | |
7ff33365 DA |
137 | #endif |
138 | if ((unit >= NFD) || (bp->b_blkno < 0)) { | |
139 | printf("fdstrat: unit = %d, blkno = %d, bcount = %d\n", | |
140 | unit, bp->b_blkno, bp->b_bcount); | |
141 | pg("fd:error in fdstrategy"); | |
142 | bp->b_error = EINVAL; | |
32f56e31 | 143 | bp->b_flags |= B_ERROR; |
7ff33365 DA |
144 | goto bad; |
145 | } | |
146 | /* | |
147 | * Set up block calculations. | |
148 | */ | |
149 | blknum = (unsigned long) bp->b_blkno * DEV_BSIZE/FDBLK; | |
32f56e31 | 150 | nblocks = fd_types[type].size; |
7ff33365 | 151 | if (blknum + (bp->b_bcount / FDBLK) > nblocks) { |
32f56e31 BJ |
152 | if (blknum == nblocks) { |
153 | bp->b_resid = bp->b_bcount; | |
154 | } else { | |
155 | bp->b_error = ENOSPC; | |
156 | bp->b_flags |= B_ERROR; | |
157 | } | |
7ff33365 DA |
158 | goto bad; |
159 | } | |
32f56e31 | 160 | bp->b_cylin = blknum / (fd_types[type].sectrac * 2); |
7ff33365 DA |
161 | dp = &fd_unit[unit].head; |
162 | dp0 = &fd_unit[0].head; | |
163 | dp1 = &fd_unit[1].head; | |
32f56e31 | 164 | dp->b_step = (fd_types[fd_unit[unit].type].steptrac); |
7ff33365 DA |
165 | s = splbio(); |
166 | disksort(dp, bp); | |
167 | if ((dp0->b_active == 0)&&(dp1->b_active == 0)) { | |
32f56e31 BJ |
168 | #ifdef FDDEBUG |
169 | printf("T|"); | |
170 | #endif | |
7ff33365 DA |
171 | dp->b_active = 1; |
172 | fd_drive = unit; | |
32f56e31 | 173 | fd_track = -1; /* force seek on first xfer */ |
7ff33365 DA |
174 | untimeout(fd_turnoff,unit); |
175 | fdstart(unit); /* start drive if idle */ | |
176 | } | |
177 | splx(s); | |
178 | return; | |
179 | ||
180 | bad: | |
7ff33365 DA |
181 | biodone(bp); |
182 | } | |
183 | ||
184 | /****************************************************************************/ | |
185 | /* motor control stuff */ | |
186 | /****************************************************************************/ | |
187 | set_motor(unit,reset) | |
188 | int unit,reset; | |
189 | { | |
190 | int m0,m1; | |
191 | m0 = fd_unit[0].motor; | |
192 | m1 = fd_unit[1].motor; | |
32f56e31 | 193 | outb(fdc+fdout,unit | (reset ? 0 : 0xC) | (m0 ? 16 : 0) | (m1 ? 32 : 0)); |
7ff33365 DA |
194 | } |
195 | ||
196 | fd_turnoff(unit) | |
197 | int unit; | |
198 | { | |
199 | fd_unit[unit].motor = 0; | |
200 | if (unit) set_motor(0,0); | |
201 | else set_motor(1,0); | |
202 | } | |
203 | ||
204 | fd_turnon(unit) | |
205 | int unit; | |
206 | { | |
207 | fd_unit[unit].motor = 1; | |
208 | set_motor(unit,0); | |
209 | } | |
210 | ||
211 | /****************************************************************************/ | |
212 | /* fdc in/out */ | |
213 | /****************************************************************************/ | |
214 | int | |
215 | in_fdc() | |
216 | { | |
217 | int i; | |
32f56e31 BJ |
218 | while ((i = inb(fdc+fdsts) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM)) |
219 | if (i == NE7_RQM) return -1; | |
220 | return inb(fdc+fddata); | |
7ff33365 DA |
221 | } |
222 | ||
223 | dump_stat() | |
224 | { | |
225 | int i; | |
226 | for(i=0;i<7;i++) { | |
227 | fd_status[i] = in_fdc(); | |
228 | if (fd_status[i] < 0) break; | |
229 | } | |
32f56e31 BJ |
230 | printf("FD bad status :%X %X %X %X %X %X %X\n", |
231 | fd_status[0], fd_status[1], fd_status[2], fd_status[3], | |
232 | fd_status[4], fd_status[5], fd_status[6] ); | |
7ff33365 DA |
233 | } |
234 | ||
235 | out_fdc(x) | |
236 | int x; | |
237 | { | |
238 | int r,errcnt; | |
239 | static int maxcnt = 0; | |
240 | errcnt = 0; | |
241 | do { | |
32f56e31 BJ |
242 | r = (inb(fdc+fdsts) & (NE7_DIO|NE7_RQM)); |
243 | if (r== NE7_RQM) break; | |
244 | if (r==(NE7_DIO|NE7_RQM)) { | |
7ff33365 DA |
245 | dump_stat(); /* error: direction. eat up output */ |
246 | #ifdef FDOTHER | |
32f56e31 | 247 | printf("%X\n",x); |
7ff33365 DA |
248 | #endif |
249 | } | |
250 | /* printf("Error r = %d:",r); */ | |
251 | errcnt++; | |
252 | } while (1); | |
253 | if (errcnt > maxcnt) { | |
254 | maxcnt = errcnt; | |
255 | #ifdef FDOTHER | |
32f56e31 | 256 | printf("New MAX = %d\n",maxcnt); |
7ff33365 DA |
257 | #endif |
258 | } | |
32f56e31 | 259 | outb(fdc+fddata,x); |
7ff33365 DA |
260 | } |
261 | ||
262 | /* see if fdc responding */ | |
263 | int | |
264 | check_fdc() | |
265 | { | |
266 | int i; | |
267 | for(i=0;i<100;i++) { | |
32f56e31 | 268 | if (inb(fdc+fdsts)& NE7_RQM) return 0; |
7ff33365 DA |
269 | } |
270 | return 1; | |
271 | } | |
272 | ||
273 | /****************************************************************************/ | |
274 | /* fdopen/fdclose */ | |
275 | /****************************************************************************/ | |
276 | fdopen(dev, flags) | |
277 | dev_t dev; | |
278 | int flags; | |
279 | { | |
32f56e31 BJ |
280 | int unit = FDUNIT(minor(dev)); |
281 | int type = FDTYPE(minor(dev)); | |
7ff33365 DA |
282 | int s; |
283 | ||
284 | /* check bounds */ | |
285 | if (unit >= NFD) return(ENXIO); | |
286 | if (type >= NUMTYPES) return(ENXIO); | |
32f56e31 | 287 | /* |
7ff33365 | 288 | if (check_fdc()) return(EBUSY); |
32f56e31 | 289 | */ |
7ff33365 DA |
290 | |
291 | /* Set proper disk type, only allow one type */ | |
7ff33365 DA |
292 | return 0; |
293 | } | |
294 | ||
295 | fdclose(dev) | |
296 | dev_t dev; | |
297 | { | |
298 | } | |
299 | ||
300 | /****************************************************************************/ | |
301 | /* fdread/fdwrite */ | |
302 | /****************************************************************************/ | |
303 | /* | |
304 | * Routines to do raw IO for a unit. | |
305 | */ | |
306 | fdread(dev, uio) /* character read routine */ | |
307 | dev_t dev; | |
308 | struct uio *uio; | |
309 | { | |
32f56e31 | 310 | int unit = FDUNIT(minor(dev)) ; |
7ff33365 DA |
311 | if (unit >= NFD) return(ENXIO); |
312 | return(physio(fdstrategy,&fd_unit[unit].rhead,dev,B_READ,minphys,uio)); | |
313 | } | |
314 | ||
315 | fdwrite(dev, uio) /* character write routine */ | |
316 | dev_t dev; | |
317 | struct uio *uio; | |
318 | { | |
32f56e31 | 319 | int unit = FDUNIT(minor(dev)) ; |
7ff33365 DA |
320 | if (unit >= NFD) return(ENXIO); |
321 | return(physio(fdstrategy,&fd_unit[unit].rhead,dev,B_WRITE,minphys,uio)); | |
322 | } | |
323 | ||
324 | /****************************************************************************/ | |
325 | /* fdstart */ | |
326 | /****************************************************************************/ | |
327 | fdstart(unit) | |
328 | int unit; | |
329 | { | |
330 | register struct buf *dp,*bp; | |
331 | int s; | |
332 | ||
32f56e31 BJ |
333 | #ifdef FDTEST |
334 | printf("st%d|",unit); | |
335 | #endif | |
336 | s = splbio(); | |
7ff33365 DA |
337 | if (!fd_unit[unit].motor) { |
338 | fd_turnon(unit); | |
339 | /* Wait for 1 sec */ | |
340 | timeout(fdstart,unit,hz); | |
32f56e31 BJ |
341 | /*DELAY(1000000);*/ |
342 | }else | |
343 | { | |
344 | /* make sure drive is selected as well as on */ | |
345 | /*set_motor(unit,0);*/ | |
346 | ||
7ff33365 DA |
347 | dp = &fd_unit[unit].head; |
348 | bp = dp->b_actf; | |
349 | fd_retry = 0; | |
32f56e31 BJ |
350 | if (fd_unit[unit].reset) fd_state = 1; |
351 | else { | |
352 | /* DO a RESET */ | |
353 | fd_unit[unit].reset = 1; | |
354 | fd_state = 5; | |
355 | } | |
7ff33365 | 356 | fd_skip = 0; |
32f56e31 BJ |
357 | #ifdef FDDEBUG |
358 | printf("Seek %d %d\n", bp->b_cylin, dp->b_step); | |
359 | #endif | |
360 | if (bp->b_cylin != fd_track) { | |
7ff33365 DA |
361 | /* Seek necessary, never quite sure where head is at! */ |
362 | out_fdc(15); /* Seek function */ | |
363 | out_fdc(unit); /* Drive number */ | |
32f56e31 BJ |
364 | out_fdc(bp->b_cylin * dp->b_step); |
365 | } else fdintr(0); | |
7ff33365 | 366 | } |
32f56e31 | 367 | splx(s); |
7ff33365 DA |
368 | } |
369 | ||
370 | fd_timeout(x) | |
371 | int x; | |
372 | { | |
373 | int i,j; | |
374 | struct buf *dp,*bp; | |
375 | ||
376 | dp = &fd_unit[fd_drive].head; | |
377 | bp = dp->b_actf; | |
378 | ||
379 | out_fdc(0x4); | |
380 | out_fdc(fd_drive); | |
381 | i = in_fdc(); | |
382 | printf("Timeout drive status %X\n",i); | |
383 | ||
384 | out_fdc(0x8); | |
385 | i = in_fdc(); | |
386 | j = in_fdc(); | |
387 | printf("ST0 = %X, PCN = %X\n",i,j); | |
388 | ||
389 | if (bp) badtrans(dp,bp); | |
390 | } | |
391 | ||
392 | /****************************************************************************/ | |
393 | /* fdintr */ | |
394 | /****************************************************************************/ | |
395 | fdintr(vec) | |
396 | int vec; | |
397 | { | |
398 | register struct buf *dp,*bp; | |
399 | struct buf *dpother; | |
32f56e31 | 400 | int read,head,trac,sec,i,s,sectrac,cyl; |
7ff33365 DA |
401 | unsigned long blknum; |
402 | struct fd_type *ft; | |
32f56e31 BJ |
403 | |
404 | #ifdef FDTEST | |
405 | printf("state %d, vec %d, dr %d|",fd_state,vec,fd_drive); | |
406 | #endif | |
7ff33365 DA |
407 | |
408 | dp = &fd_unit[fd_drive].head; | |
409 | bp = dp->b_actf; | |
410 | read = bp->b_flags & B_READ; | |
32f56e31 | 411 | ft = &fd_types[FDTYPE(bp->b_dev)]; |
7ff33365 DA |
412 | |
413 | switch (fd_state) { | |
414 | case 1 : /* SEEK DONE, START DMA */ | |
32f56e31 BJ |
415 | /* Make sure seek really happened*/ |
416 | if (vec) { | |
417 | out_fdc(0x8); | |
418 | i = in_fdc(); | |
419 | cyl = in_fdc(); | |
420 | if (!(i&0x20) || (cyl != bp->b_cylin*dp->b_step)) { | |
421 | printf("Stray int ST0 = %X, PCN = %X:",i,cyl); | |
422 | return; | |
423 | } | |
424 | } | |
425 | ||
7ff33365 | 426 | fd_track = bp->b_cylin; |
32f56e31 | 427 | at_dma(read,bp->b_un.b_addr+fd_skip,FDBLK, fd_dmachan); |
7ff33365 DA |
428 | blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK |
429 | + fd_skip/FDBLK; | |
430 | sectrac = ft->sectrac; | |
431 | sec = blknum % (sectrac * 2); | |
432 | head = sec / sectrac; | |
433 | sec = sec % sectrac + 1; | |
434 | ||
435 | if (read) out_fdc(0xE6); /* READ */ | |
436 | else out_fdc(0xC5); /* WRITE */ | |
437 | out_fdc(head << 2 | fd_drive); /* head & unit */ | |
438 | out_fdc(fd_track); /* track */ | |
439 | out_fdc(head); | |
440 | out_fdc(sec); /* sector XXX +1? */ | |
441 | out_fdc(ft->secsize); /* sector size */ | |
442 | out_fdc(sectrac); /* sectors/track */ | |
443 | out_fdc(ft->gap); /* gap size */ | |
444 | out_fdc(ft->datalen); /* data length */ | |
445 | fd_state = 2; | |
446 | /* XXX PARANOIA */ | |
447 | untimeout(fd_timeout,2); | |
448 | timeout(fd_timeout,2,hz); | |
449 | break; | |
450 | case 2 : /* IO DONE, post-analyze */ | |
451 | untimeout(fd_timeout,2); | |
452 | for(i=0;i<7;i++) { | |
453 | fd_status[i] = in_fdc(); | |
454 | } | |
455 | if (fd_status[0]&0xF8) { | |
456 | #ifdef FDOTHER | |
32f56e31 | 457 | printf("status0 err %d:",fd_status[0]); |
7ff33365 DA |
458 | #endif |
459 | goto retry; | |
460 | } | |
32f56e31 | 461 | /* |
7ff33365 DA |
462 | if (fd_status[1]){ |
463 | printf("status1 err %d:",fd_status[0]); | |
464 | goto retry; | |
465 | } | |
466 | if (fd_status[2]){ | |
467 | printf("status2 err %d:",fd_status[0]); | |
468 | goto retry; | |
469 | } | |
32f56e31 | 470 | */ |
7ff33365 DA |
471 | /* All OK */ |
472 | if (!kernel_space(bp->b_un.b_addr+fd_skip)) { | |
473 | /* RAW transfer */ | |
32f56e31 BJ |
474 | if (read) bcopy(dma_bounce[fd_dmachan]->b_un.b_addr, |
475 | bp->b_un.b_addr+fd_skip, FDBLK); | |
7ff33365 DA |
476 | } |
477 | fd_skip += FDBLK; | |
478 | if (fd_skip >= bp->b_bcount) { | |
32f56e31 BJ |
479 | #ifdef FDTEST |
480 | printf("DONE %d|", bp->b_blkno); | |
481 | #endif | |
7ff33365 DA |
482 | /* ALL DONE */ |
483 | fd_skip = 0; | |
484 | bp->b_resid = 0; | |
485 | dp->b_actf = bp->av_forw; | |
486 | biodone(bp); | |
487 | nextstate(dp); | |
488 | ||
489 | } else { | |
32f56e31 BJ |
490 | #ifdef FDDEBUG |
491 | printf("next|"); | |
492 | #endif | |
7ff33365 DA |
493 | /* set up next transfer */ |
494 | blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK | |
495 | + fd_skip/FDBLK; | |
496 | fd_state = 1; | |
497 | bp->b_cylin = (blknum / (ft->sectrac * 2)); | |
7ff33365 | 498 | if (bp->b_cylin != fd_track) { |
32f56e31 BJ |
499 | #ifdef FDTEST |
500 | printf("Seek|"); | |
501 | #endif | |
7ff33365 DA |
502 | /* SEEK Necessary */ |
503 | out_fdc(15); /* Seek function */ | |
504 | out_fdc(fd_drive);/* Drive number */ | |
32f56e31 | 505 | out_fdc(bp->b_cylin * dp->b_step); |
7ff33365 | 506 | break; |
32f56e31 | 507 | } else fdintr(0); |
7ff33365 DA |
508 | } |
509 | break; | |
510 | case 3: | |
32f56e31 BJ |
511 | #ifdef FDOTHER |
512 | printf("Seek %d %d\n", bp->b_cylin, dp->b_step); | |
513 | #endif | |
7ff33365 DA |
514 | /* Seek necessary */ |
515 | out_fdc(15); /* Seek function */ | |
516 | out_fdc(fd_drive);/* Drive number */ | |
32f56e31 | 517 | out_fdc(bp->b_cylin * dp->b_step); |
7ff33365 DA |
518 | fd_state = 1; |
519 | break; | |
520 | case 4: | |
521 | out_fdc(3); /* specify command */ | |
522 | out_fdc(0xDF); | |
523 | out_fdc(2); | |
524 | out_fdc(7); /* Recalibrate Function */ | |
525 | out_fdc(fd_drive); | |
526 | fd_state = 3; | |
527 | break; | |
32f56e31 BJ |
528 | case 5: |
529 | #ifdef FDOTHER | |
530 | printf("**RESET**\n"); | |
531 | #endif | |
532 | /* Try a reset, keep motor on */ | |
533 | set_motor(fd_drive,1); | |
534 | set_motor(fd_drive,0); | |
535 | outb(fdc+fdctl,ft->trans); | |
536 | fd_retry++; | |
537 | fd_state = 4; | |
538 | break; | |
7ff33365 | 539 | default: |
7ff33365 DA |
540 | printf("Unexpected FD int->"); |
541 | out_fdc(0x8); | |
542 | i = in_fdc(); | |
543 | sec = in_fdc(); | |
544 | printf("ST0 = %X, PCN = %X\n",i,sec); | |
545 | out_fdc(0x4A); | |
546 | out_fdc(fd_drive); | |
547 | for(i=0;i<7;i++) { | |
548 | fd_status[i] = in_fdc(); | |
549 | } | |
550 | printf("intr status :%X %X %X %X %X %X %X ", | |
551 | fd_status[0], fd_status[1], fd_status[2], fd_status[3], | |
552 | fd_status[4], fd_status[5], fd_status[6] ); | |
7ff33365 DA |
553 | break; |
554 | } | |
555 | return; | |
556 | retry: | |
557 | switch(fd_retry) { | |
558 | case 0: case 1: | |
32f56e31 | 559 | case 2: case 3: |
7ff33365 | 560 | break; |
32f56e31 | 561 | case 4: |
7ff33365 | 562 | fd_retry++; |
32f56e31 BJ |
563 | fd_state = 5; |
564 | fdintr(0); | |
7ff33365 | 565 | return; |
32f56e31 | 566 | case 5: case 6: case 7: |
7ff33365 DA |
567 | break; |
568 | default: | |
569 | printf("FD err %X %X %X %X %X %X %X\n", | |
570 | fd_status[0], fd_status[1], fd_status[2], fd_status[3], | |
571 | fd_status[4], fd_status[5], fd_status[6] ); | |
572 | badtrans(dp,bp); | |
573 | return; | |
574 | } | |
575 | fd_state = 1; | |
576 | fd_retry++; | |
32f56e31 | 577 | fdintr(0); |
7ff33365 DA |
578 | } |
579 | ||
580 | badtrans(dp,bp) | |
581 | struct buf *dp,*bp; | |
582 | { | |
583 | ||
584 | bp->b_flags |= B_ERROR; | |
585 | bp->b_error = EIO; | |
586 | bp->b_resid = bp->b_bcount - fd_skip; | |
587 | dp->b_actf = bp->av_forw; | |
588 | fd_skip = 0; | |
589 | biodone(bp); | |
590 | nextstate(dp); | |
591 | ||
592 | } | |
593 | ||
594 | /* | |
595 | nextstate : After a transfer is done, continue processing | |
596 | requests on the current drive queue. If empty, go to | |
597 | the other drives queue. If that is empty too, timeout | |
598 | to turn off the current drive in 5 seconds, and go | |
599 | to state 0 (not expecting any interrupts). | |
600 | */ | |
601 | ||
602 | nextstate(dp) | |
603 | struct buf *dp; | |
604 | { | |
605 | struct buf *dpother; | |
606 | ||
607 | dpother = &fd_unit[fd_drive ? 0 : 1].head; | |
608 | if (dp->b_actf) fdstart(fd_drive); | |
609 | else if (dpother->b_actf) { | |
32f56e31 BJ |
610 | #ifdef FDTEST |
611 | printf("switch|"); | |
612 | #endif | |
613 | untimeout(fd_turnoff,fd_drive); | |
614 | timeout(fd_turnoff,fd_drive,5*hz); | |
615 | fd_drive = 1 - fd_drive; | |
7ff33365 | 616 | dp->b_active = 0; |
32f56e31 BJ |
617 | dpother->b_active = 1; |
618 | fdstart(fd_drive); | |
7ff33365 | 619 | } else { |
32f56e31 BJ |
620 | #ifdef FDTEST |
621 | printf("off|"); | |
622 | #endif | |
7ff33365 DA |
623 | untimeout(fd_turnoff,fd_drive); |
624 | timeout(fd_turnoff,fd_drive,5*hz); | |
625 | fd_state = 0; | |
626 | dp->b_active = 0; | |
627 | } | |
628 | } | |
32f56e31 | 629 | #endif |