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1.1 root 1: /*-
2: * Copyright (c) 1990 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Don Ahn.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
36: * @(#)fd.c 7.3 (Berkeley) 5/25/91
37: */
38:
39: /****************************************************************************/
40: /* standalone fd driver */
41: /****************************************************************************/
42: #include "param.h"
1.1.1.2 root 43: #include "disklabel.h"
1.1 root 44: #include "i386/isa/fdreg.h"
45: #include "i386/isa/isa.h"
46: #include "saio.h"
47:
48: #define NUMRETRY 10
49: /*#define FDDEBUG*/
50:
51: #define NFD 2
52: #define FDBLK 512
53:
1.1.1.2 root 54: extern struct disklabel disklabel;
55:
1.1 root 56: struct fd_type {
57: int sectrac; /* sectors per track */
58: int secsize; /* size code for sectors */
59: int datalen; /* data len when secsize = 0 */
60: int gap; /* gap len between sectors */
61: int tracks; /* total num of tracks */
62: int size; /* size of disk in sectors */
63: int steptrac; /* steps per cylinder */
64: int trans; /* transfer speed code */
65: };
66:
1.1.1.3 ! root 67: struct fd_type fd_types[] = {
1.1 root 68: { 18,2,0xFF,0x1B,80,2880,1,0 }, /* 1.44 meg HD 3.5in floppy */
69: { 15,2,0xFF,0x1B,80,2400,1,0 }, /* 1.2 meg HD floppy */
1.1.1.3 ! root 70: /* need 720K 3.5in here as well */
! 71: #ifdef noway
1.1 root 72: { 9,2,0xFF,0x23,40,720,2,1 }, /* 360k floppy in 1.2meg drive */
73: { 9,2,0xFF,0x2A,40,720,1,1 }, /* 360k floppy in DD drive */
1.1.1.3 ! root 74: #endif
1.1 root 75: };
76:
77:
78: /* state needed for current transfer */
1.1.1.3 ! root 79: static int probetype;
1.1 root 80: static int fd_type;
81: static int fd_motor;
82: static int fd_retry;
83: static int fd_drive;
84: static int fd_status[7];
85:
86: static int fdc = IO_FD1; /* floppy disk base */
87:
88: /* Make sure DMA buffer doesn't cross 64k boundary */
89: char bounce[FDBLK];
90:
91:
92: /****************************************************************************/
93: /* fdstrategy */
94: /****************************************************************************/
95: int
96: fdstrategy(io,func)
97: register struct iob *io;
98: int func;
99: {
100: char *address;
101: long nblocks,blknum;
102: int unit, iosize;
103:
104: #ifdef FDDEBUG
105: printf("fdstrat ");
106: #endif
107: unit = io->i_unit;
1.1.1.3 ! root 108: /*fd_type = io->i_part;*/
1.1 root 109:
110: /*
111: * Set up block calculations.
112: */
113: iosize = io->i_cc / FDBLK;
114: blknum = (unsigned long) io->i_bn * DEV_BSIZE / FDBLK;
1.1.1.3 ! root 115: nblocks = fd_types[fd_type].size /* disklabel.d_secperunit */;
1.1 root 116: if ((blknum + iosize > nblocks) || blknum < 0) {
1.1.1.3 ! root 117: #ifdef nope
1.1 root 118: printf("bn = %d; sectors = %d; type = %d; fssize = %d ",
119: blknum, iosize, fd_type, nblocks);
120: printf("fdstrategy - I/O out of filesystem boundaries\n");
121: #endif
122: return(-1);
123: }
124:
125: address = io->i_ma;
126: while (iosize > 0) {
1.1.1.2 root 127: /*printf("iosize %d ", iosize);*/
1.1 root 128: if (fdio(func, unit, blknum, address))
129: return(-1);
130: iosize--;
131: blknum++;
132: address += FDBLK;
133: }
134: return(io->i_cc);
135: }
136:
1.1.1.3 ! root 137: int ccyl = -1;
! 138:
1.1 root 139: int
140: fdio(func, unit, blknum, address)
141: int func,unit,blknum;
142: char *address;
143: {
1.1.1.3 ! root 144: int i,j, cyl, sectrac,sec,head,numretry;
1.1 root 145: struct fd_type *ft;
146:
1.1.1.2 root 147: /*printf("fdio ");*/
1.1 root 148: ft = &fd_types[fd_type];
149:
1.1.1.3 ! root 150: sectrac = ft->sectrac;
! 151: cyl = blknum / (sectrac*2);
1.1 root 152: numretry = NUMRETRY;
153:
1.1.1.3 ! root 154: if (func == F_WRITE)
! 155: bcopy(address,bounce,FDBLK);
1.1 root 156:
157: retry:
1.1.1.3 ! root 158: if (ccyl != cyl) {
1.1 root 159: out_fdc(15); /* Seek function */
160: out_fdc(unit); /* Drive number */
161: out_fdc(cyl);
162:
163: waitio();
1.1.1.3 ! root 164: }
1.1 root 165:
166: out_fdc(0x8);
167: i = in_fdc(); j = in_fdc();
168: if (!(i&0x20) || (cyl != j)) {
169: numretry--;
1.1.1.3 ! root 170: ccyl = j;
1.1 root 171: if (numretry) goto retry;
1.1.1.3 ! root 172:
1.1 root 173: printf("Seek error %d, req = %d, at = %d\n",i,cyl,j);
174: printf("unit %d, type %d, sectrac %d, blknum %d\n",
175: unit,fd_type,sectrac,blknum);
1.1.1.3 ! root 176:
1.1 root 177: return -1;
178: }
1.1.1.3 ! root 179: ccyl = cyl;
1.1 root 180:
181: /* set up transfer */
182: fd_dma(func == F_READ, bounce, FDBLK);
1.1.1.3 ! root 183: sec = blknum % (sectrac * 2) /*disklabel.d_secpercyl*/;
1.1 root 184: head = sec / sectrac;
185: sec = sec % sectrac + 1;
186: #ifdef FDDEBUG
187: printf("sec %d hd %d cyl %d ", sec, head, cyl);
188: #endif
189:
190: if (func == F_READ) out_fdc(0xE6);/* READ */
191: else out_fdc(0xC5); /* WRITE */
192: out_fdc(head << 2 | fd_drive); /* head & unit */
193: out_fdc(cyl); /* track */
194: out_fdc(head);
1.1.1.3 ! root 195: out_fdc(sec); /* sector */
1.1 root 196: out_fdc(ft->secsize); /* sector size */
197: out_fdc(sectrac); /* sectors/track */
198: out_fdc(ft->gap); /* gap size */
199: out_fdc(ft->datalen); /* data length */
200:
201: waitio();
202:
203: for(i=0;i<7;i++) {
204: fd_status[i] = in_fdc();
205: }
206: if (fd_status[0]&0xF8) {
207: numretry--;
1.1.1.3 ! root 208:
! 209: if (!probetype)
! 210: printf("FD err %lx %lx %lx %lx %lx %lx %lx\n",
! 211: fd_status[0], fd_status[1], fd_status[2], fd_status[3],
! 212: fd_status[4], fd_status[5], fd_status[6] );
1.1.1.2 root 213: if (numretry) goto retry;
1.1 root 214: return -1;
215: }
1.1.1.3 ! root 216: if (func == F_READ)
! 217: bcopy(bounce,address,FDBLK);
1.1 root 218: return 0;
219: }
220:
221: /****************************************************************************/
222: /* fdc in/out */
223: /****************************************************************************/
224: int
225: in_fdc()
226: {
227: int i;
228: while ((i = inb(fdc+fdsts) & 192) != 192) if (i == 128) return -1;
229: return inb(0x3f5);
230: }
231:
232: dump_stat()
233: {
234: int i;
235: for(i=0;i<7;i++) {
236: fd_status[i] = in_fdc();
237: if (fd_status[i] < 0) break;
238: }
239: #ifdef FDDEBUGx
240: printf("FD bad status :%lx %lx %lx %lx %lx %lx %lx\n",
241: fd_status[0], fd_status[1], fd_status[2], fd_status[3],
242: fd_status[4], fd_status[5], fd_status[6] );
243: #endif
244: }
245:
246: set_intr()
247: {
248: /* initialize 8259's */
249: outb(0x20,0x11);
250: outb(0x21,32);
251: outb(0x21,4);
252: outb(0x21,1);
253: outb(0x21,0x0f); /* turn on int 6 */
254:
255: /*
256: outb(0xa0,0x11);
257: outb(0xa1,40);
258: outb(0xa1,2);
259: outb(0xa1,1);
260: outb(0xa1,0xff); */
261:
262: }
263:
264:
265:
266: waitio()
267: {
268: char c;
269: int n;
270:
271: do
272: outb(0x20,0xc); /* read polled interrupt */
273: while ((c=inb(0x20))&0x7f != 6); /* wait for int */
274: outb(0x20,0x20);
275: }
276:
277: out_fdc(x)
278: int x;
279: {
280: int r;
281: do {
282: r = (inb(fdc+fdsts) & 192);
283: if (r==128) break;
284: if (r==192) {
285: dump_stat(); /* error: direction. eat up output */
286: }
287: } while (1);
288: outb(0x3f5,x&0xFF);
289: }
290:
291:
292: /****************************************************************************/
293: /* fdopen/fdclose */
294: /****************************************************************************/
295: fdopen(io)
296: register struct iob *io;
297: {
298: int unit, type, i;
299: struct fd_type *ft;
1.1.1.3 ! root 300: char buf[512];
1.1 root 301:
302: unit = io->i_unit;
1.1.1.3 ! root 303: /* type = io->i_part; */
1.1 root 304: io->i_boff = 0; /* no disklabels -- tar/dump wont work */
305: #ifdef FDDEBUG
306: printf("fdopen %d %d ", unit, type);
307: #endif
1.1.1.3 ! root 308: ft = &fd_types[0];
1.1 root 309: fd_drive = unit;
310:
311: set_intr(); /* init intr cont */
312:
313: /* Try a reset, keep motor on */
314: outb(0x3f2,0);
315: for(i=0; i < 100000; i++);
316: outb(0x3f2,unit | (unit ? 32 : 16) );
317: for(i=0; i < 100000; i++);
318: outb(0x3f2,unit | 0xC | (unit ? 32 : 16) );
319: outb(0x3f7,ft->trans);
320: fd_motor = 1;
321:
322: waitio();
323:
324: out_fdc(3); /* specify command */
325: out_fdc(0xDF);
326: out_fdc(2);
327:
328: out_fdc(7); /* Recalibrate Function */
329: out_fdc(unit);
330:
331: waitio();
1.1.1.3 ! root 332: probetype = 1;
! 333: for (fd_type = 0; fd_type < sizeof(fd_types)/sizeof(fd_types[0]);
! 334: fd_type++, ft++) {
! 335: /*for(i=0; i < 100000; i++);
! 336: outb(0x3f7,ft->trans);
! 337: for(i=0; i < 100000; i++);*/
! 338: if (fdio(F_READ, unit, ft->sectrac-1, buf) >= 0){
! 339: probetype = 0;
! 340: return(0);
! 341: }
! 342: }
! 343: printf("failed fdopen");
! 344: return(-1);
1.1 root 345: }
346:
347:
348: /****************************************************************************/
349: /* fd_dma */
350: /* set up DMA read/write operation and virtual address addr for nbytes */
351: /****************************************************************************/
352: fd_dma(read,addr,nbytes)
353: int read;
354: unsigned long addr;
355: int nbytes;
356: {
357: /* Set read/write bytes */
358: if (read) {
359: outb(0xC,0x46); outb(0xB,0x46);
360: } else {
361: outb(0xC,0x4A); outb(0xB,0x4A);
362: }
363: /* Send start address */
364: outb(0x4,addr & 0xFF);
365: outb(0x4,(addr>>8) & 0xFF);
366: outb(0x81,(addr>>16) & 0xFF);
367: /* Send count */
368: nbytes--;
369: outb(0x5,nbytes & 0xFF);
370: outb(0x5,(nbytes>>8) & 0xFF);
371: /* set channel 2 */
372: outb(0x0A,2);
373: }
374:
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