bmd.c revision 1.14
1 /* $NetBSD: bmd.c,v 1.14 2008/06/14 13:36:24 isaki Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Tetsuya Isaki. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* 31 * Nereid bank memory disk 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: bmd.c,v 1.14 2008/06/14 13:36:24 isaki Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/buf.h> 40 #include <sys/conf.h> 41 #include <sys/device.h> 42 #include <sys/kernel.h> 43 #include <sys/stat.h> 44 #include <sys/disk.h> 45 #include <sys/disklabel.h> 46 #include <sys/ioctl.h> 47 #include <sys/fcntl.h> 48 #include <sys/proc.h> 49 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 53 #include <arch/x68k/dev/intiovar.h> 54 55 #define BMD_ADDR1 (0xece3f0) 56 #define BMD_ADDR2 (0xecebf0) 57 58 #define BMD_PAGESIZE (0x10000) /* 64KB */ 59 #define BMD_BSIZE (512) 60 #define BLKS_PER_PAGE (BMD_PAGESIZE / BMD_BSIZE) 61 62 #define BMD_PAGE (0) 63 #define BMD_CTRL (1) 64 #define BMD_CTRL_ENABLE (0x80) /* DIP8: 1=Enable, 0=Disable */ 65 #define BMD_CTRL_MEMORY (0x40) /* 1=16M available, 0=4M available */ 66 #define BMD_CTRL_WINDOW (0x20) /* DIP6: 1=0xee0000, 0=0xef0000 */ 67 68 69 #define BMD_UNIT(dev) (minor(dev) / 8) 70 71 #ifdef BMD_DEBUG 72 #define DPRINTF(x) printf x 73 #else 74 #define DPRINTF(x) /* nothing */ 75 #endif 76 77 struct bmd_softc { 78 struct device sc_dev; 79 struct disk sc_dkdev; 80 bus_space_tag_t sc_iot; 81 bus_space_handle_t sc_ioh; 82 bus_space_handle_t sc_bank; 83 84 int sc_maxpage; 85 int sc_window; 86 87 int sc_flags; 88 #define BMD_OPENBLK (0x01) 89 #define BMD_OPENCHR (0x02) 90 #define BMD_OPEN (BMD_OPENBLK | BMD_OPENCHR) 91 }; 92 93 static int bmd_match(struct device *, struct cfdata *, void *); 94 static void bmd_attach(struct device *, struct device *, void *); 95 static int bmd_getdisklabel(struct bmd_softc *, dev_t); 96 97 extern struct cfdriver bmd_cd; 98 99 CFATTACH_DECL(bmd, sizeof(struct bmd_softc), 100 bmd_match, bmd_attach, NULL, NULL); 101 102 dev_type_open(bmdopen); 103 dev_type_close(bmdclose); 104 dev_type_read(bmdread); 105 dev_type_write(bmdwrite); 106 dev_type_ioctl(bmdioctl); 107 dev_type_strategy(bmdstrategy); 108 dev_type_dump(bmddump); 109 dev_type_size(bmdsize); 110 111 const struct bdevsw bmd_bdevsw = { 112 bmdopen, bmdclose, bmdstrategy, bmdioctl, bmddump, bmdsize, D_DISK 113 }; 114 115 const struct cdevsw bmd_cdevsw = { 116 bmdopen, bmdclose, bmdread, bmdwrite, bmdioctl, 117 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 118 }; 119 120 struct dkdriver bmddkdriver = { bmdstrategy }; 121 122 static int 123 bmd_match(struct device *parent, struct cfdata *cf, void *aux) 124 { 125 struct intio_attach_args *ia = aux; 126 bus_space_tag_t iot = ia->ia_bst; 127 bus_space_handle_t ioh; 128 129 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 130 ia->ia_addr = BMD_ADDR1; 131 132 /* fixed parameter */ 133 if (ia->ia_addr != BMD_ADDR1 && ia->ia_addr != BMD_ADDR2) 134 return (0); 135 136 if (badaddr(INTIO_ADDR(ia->ia_addr))) 137 return (0); 138 139 ia->ia_size = 2; 140 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) 141 return (0); 142 143 bus_space_unmap(iot, ioh, ia->ia_size); 144 145 return (1); 146 } 147 148 static void 149 bmd_attach(struct device *parent, struct device *self, void *aux) 150 { 151 struct bmd_softc *sc = (struct bmd_softc *)self; 152 struct intio_attach_args *ia = aux; 153 bus_space_tag_t iot = ia->ia_bst; 154 bus_space_handle_t ioh; 155 u_int8_t r; 156 157 printf(": Nereid Bank Memory Disk\n"); 158 printf("%s: ", sc->sc_dev.dv_xname); 159 160 /* Map I/O space */ 161 ia->ia_size = 2; 162 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) { 163 printf("can't map I/O space\n"); 164 return; 165 } 166 167 sc->sc_iot = iot; 168 sc->sc_ioh = ioh; 169 170 /* read control register */ 171 r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, BMD_CTRL); 172 173 /* check enable-bit */ 174 if ((r & BMD_CTRL_ENABLE) == 0) { 175 printf("disabled by DIP-SW 8\n"); 176 return; 177 } 178 179 if ((r & BMD_CTRL_MEMORY)) 180 sc->sc_maxpage = 256; 181 else 182 sc->sc_maxpage = 64; 183 184 if ((r & BMD_CTRL_WINDOW)) 185 sc->sc_window = 0xef0000; 186 else 187 sc->sc_window = 0xee0000; 188 189 /* Map bank area */ 190 if (bus_space_map(iot, sc->sc_window, BMD_PAGESIZE, 0, &sc->sc_bank)) { 191 printf("can't map bank area: 0x%x\n", sc->sc_window); 192 return; 193 } 194 195 printf("%d MB, 0x%x(64KB) x %d pages\n", 196 (sc->sc_maxpage / 16), sc->sc_window, sc->sc_maxpage); 197 198 disk_init(&sc->sc_dkdev, sc->sc_dev.dv_xname, &bmddkdriver); 199 disk_attach(&sc->sc_dkdev); 200 } 201 202 int 203 bmdopen(dev_t dev, int oflags, int devtype, struct lwp *l) 204 { 205 struct bmd_softc *sc; 206 207 DPRINTF(("%s%d\n", __func__, unit)); 208 209 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 210 if (sc == NULL) 211 return ENXIO; 212 213 switch (devtype) { 214 case S_IFCHR: 215 sc->sc_flags |= BMD_OPENCHR; 216 break; 217 case S_IFBLK: 218 sc->sc_flags |= BMD_OPENBLK; 219 break; 220 } 221 222 bmd_getdisklabel(sc, dev); 223 224 return (0); 225 } 226 227 int 228 bmdclose(dev_t dev, int fflag, int devtype, struct lwp *l) 229 { 230 struct bmd_softc *sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 231 232 DPRINTF(("%s%d\n", __func__, BMD_UNIT(dev))); 233 234 switch (devtype) { 235 case S_IFCHR: 236 sc->sc_flags &= ~BMD_OPENCHR; 237 break; 238 case S_IFBLK: 239 sc->sc_flags &= ~BMD_OPENBLK; 240 break; 241 } 242 243 return (0); 244 } 245 246 void 247 bmdstrategy(struct buf *bp) 248 { 249 int unit = BMD_UNIT(bp->b_dev); 250 struct bmd_softc *sc; 251 int offset, disksize, resid; 252 int page, pg_offset, pg_resid; 253 void *data; 254 255 if (unit >= bmd_cd.cd_ndevs) { 256 bp->b_error = ENXIO; 257 goto done; 258 } 259 260 sc = device_lookup_private(&bmd_cd, BMD_UNIT(bp->b_dev)); 261 if (sc == NULL) { 262 bp->b_error = ENXIO; 263 goto done; 264 } 265 266 DPRINTF(("bmdstrategy: %s blkno %d bcount %ld:", 267 (bp->b_flags & B_READ) ? "read " : "write", 268 bp->b_blkno, bp->b_bcount)); 269 270 bp->b_resid = bp->b_bcount; 271 offset = (bp->b_blkno << DEV_BSHIFT); 272 disksize = sc->sc_maxpage * BMD_PAGESIZE; 273 if (offset >= disksize) { 274 /* EOF if read, EIO if write */ 275 if (bp->b_flags & B_READ) 276 goto done; 277 bp->b_error = EIO; 278 goto done; 279 } 280 281 resid = bp->b_resid; 282 if (resid > disksize - offset) 283 resid = disksize - offset; 284 285 data = bp->b_data; 286 do { 287 page = offset / BMD_PAGESIZE; 288 pg_offset = offset % BMD_PAGESIZE; 289 290 /* length */ 291 pg_resid = MIN(resid, BMD_PAGESIZE - pg_offset); 292 293 /* switch bank page */ 294 bus_space_write_1(sc->sc_iot, sc->sc_ioh, BMD_PAGE, page); 295 296 /* XXX we should use DMA transfer? */ 297 if ((bp->b_flags & B_READ)) { 298 bus_space_read_region_1(sc->sc_iot, sc->sc_bank, 299 pg_offset, data, pg_resid); 300 } else { 301 bus_space_write_region_1(sc->sc_iot, sc->sc_bank, 302 pg_offset, data, pg_resid); 303 } 304 305 data = (char *)data + pg_resid; 306 offset += pg_resid; 307 resid -= pg_resid; 308 bp->b_resid -= pg_resid; 309 } while (resid > 0); 310 311 DPRINTF(("\n")); 312 313 done: 314 biodone(bp); 315 } 316 317 int 318 bmdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 319 { 320 struct bmd_softc *sc; 321 struct disklabel dl; 322 int error; 323 324 DPRINTF(("%s%d %ld\n", __func__, BMD_UNIT(dev), cmd)); 325 326 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 327 if (sc == NULL) 328 return ENXIO; 329 330 switch (cmd) { 331 case DIOCGDINFO: 332 *(struct disklabel *)data = *(sc->sc_dkdev.dk_label); 333 break; 334 335 case DIOCWDINFO: 336 if ((flag & FWRITE) == 0) 337 return EBADF; 338 339 error = setdisklabel(&dl, (struct disklabel *)data, 0, NULL); 340 if (error) 341 return error; 342 error = writedisklabel(dev, bmdstrategy, &dl, NULL); 343 return error; 344 345 default: 346 return EINVAL; 347 } 348 return 0; 349 } 350 351 int 352 bmddump(dev_t dev, daddr_t blkno, void *va, size_t size) 353 { 354 355 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 356 return ENODEV; 357 } 358 359 int 360 bmdsize(dev_t dev) 361 { 362 struct bmd_softc *sc; 363 364 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 365 366 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 367 if (sc == NULL) 368 return 0; 369 370 return (sc->sc_maxpage * BMD_PAGESIZE) >> DEV_BSHIFT; 371 } 372 373 int 374 bmdread(dev_t dev, struct uio *uio, int ioflag) 375 { 376 return physio(bmdstrategy, NULL, dev, B_READ, minphys, uio); 377 } 378 379 int 380 bmdwrite(dev_t dev, struct uio *uio, int ioflag) 381 { 382 return physio(bmdstrategy, NULL, dev, B_WRITE, minphys, uio); 383 } 384 385 static int 386 bmd_getdisklabel(struct bmd_softc *sc, dev_t dev) 387 { 388 struct disklabel *lp; 389 int part; 390 391 part = DISKPART(dev); 392 lp = sc->sc_dkdev.dk_label; 393 memset(lp, 0, sizeof(struct disklabel)); 394 395 lp->d_secsize = BMD_BSIZE; 396 lp->d_nsectors = BLKS_PER_PAGE; 397 lp->d_ntracks = sc->sc_maxpage; 398 lp->d_ncylinders = 1; 399 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 400 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 401 402 lp->d_type = DTYPE_LD; 403 lp->d_rpm = 300; /* dummy */ 404 lp->d_interleave = 1; /* dummy? */ 405 406 lp->d_npartitions = part + 1; 407 lp->d_bbsize = 8192; 408 lp->d_sbsize = 8192; /* ? */ 409 410 lp->d_magic = DISKMAGIC; 411 lp->d_magic2 = DISKMAGIC; 412 lp->d_checksum = dkcksum(lp); 413 414 lp->d_partitions[part].p_size = lp->d_secperunit; 415 lp->d_partitions[part].p_fstype = FS_BSDFFS; 416 lp->d_partitions[part].p_fsize = 1024; 417 lp->d_partitions[part].p_frag = 8; 418 419 return (0); 420 } 421
Indexes created Tue Sep 30 20:09:53 GMT 2025