| 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" |
| 43 | #include "disklabel.h" |
| 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 | |
| 54 | extern struct disklabel disklabel; |
| 55 | |
| 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 | |
| 67 | struct fd_type fd_types[] = { |
| 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 */ |
| 70 | /* need 720K 3.5in here as well */ |
| 71 | #ifdef noway |
| 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 */ |
| 74 | #endif |
| 75 | }; |
| 76 | |
| 77 | |
| 78 | /* state needed for current transfer */ |
| 79 | static int probetype; |
| 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; |
| 108 | /*fd_type = io->i_part;*/ |
| 109 | |
| 110 | /* |
| 111 | * Set up block calculations. |
| 112 | */ |
| 113 | iosize = io->i_cc / FDBLK; |
| 114 | blknum = (unsigned long) io->i_bn * DEV_BSIZE / FDBLK; |
| 115 | nblocks = fd_types[fd_type].size /* disklabel.d_secperunit */; |
| 116 | if ((blknum + iosize > nblocks) || blknum < 0) { |
| 117 | #ifdef nope |
| 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) { |
| 127 | /*printf("iosize %d ", iosize);*/ |
| 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 | |
| 137 | int ccyl = -1; |
| 138 | |
| 139 | int |
| 140 | fdio(func, unit, blknum, address) |
| 141 | int func,unit,blknum; |
| 142 | char *address; |
| 143 | { |
| 144 | int i,j, cyl, sectrac,sec,head,numretry; |
| 145 | struct fd_type *ft; |
| 146 | |
| 147 | /*printf("fdio ");*/ |
| 148 | ft = &fd_types[fd_type]; |
| 149 | |
| 150 | sectrac = ft->sectrac; |
| 151 | cyl = blknum / (sectrac*2); |
| 152 | numretry = NUMRETRY; |
| 153 | |
| 154 | if (func == F_WRITE) |
| 155 | bcopy(address,bounce,FDBLK); |
| 156 | |
| 157 | retry: |
| 158 | if (ccyl != cyl) { |
| 159 | out_fdc(15); /* Seek function */ |
| 160 | out_fdc(unit); /* Drive number */ |
| 161 | out_fdc(cyl); |
| 162 | |
| 163 | waitio(); |
| 164 | } |
| 165 | |
| 166 | out_fdc(0x8); |
| 167 | i = in_fdc(); j = in_fdc(); |
| 168 | if (!(i&0x20) || (cyl != j)) { |
| 169 | numretry--; |
| 170 | ccyl = j; |
| 171 | if (numretry) goto retry; |
| 172 | |
| 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); |
| 176 | |
| 177 | return -1; |
| 178 | } |
| 179 | ccyl = cyl; |
| 180 | |
| 181 | /* set up transfer */ |
| 182 | fd_dma(func == F_READ, bounce, FDBLK); |
| 183 | sec = blknum % (sectrac * 2) /*disklabel.d_secpercyl*/; |
| 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); |
| 195 | out_fdc(sec); /* sector */ |
| 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--; |
| 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] ); |
| 213 | if (numretry) goto retry; |
| 214 | return -1; |
| 215 | } |
| 216 | if (func == F_READ) |
| 217 | bcopy(bounce,address,FDBLK); |
| 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; |
| 300 | char buf[512]; |
| 301 | |
| 302 | unit = io->i_unit; |
| 303 | /* type = io->i_part; */ |
| 304 | io->i_boff = 0; /* no disklabels -- tar/dump wont work */ |
| 305 | #ifdef FDDEBUG |
| 306 | printf("fdopen %d %d ", unit, type); |
| 307 | #endif |
| 308 | ft = &fd_types[0]; |
| 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(); |
| 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); |
| 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 | |