bmd.c revision 1.15
1 /* $NetBSD: bmd.c,v 1.15 2008/06/25 08:14:59 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 1.15 2008/06/25 08:14:59 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 disk sc_dkdev; 79 bus_space_tag_t sc_iot; 80 bus_space_handle_t sc_ioh; 81 bus_space_handle_t sc_bank; 82 83 int sc_maxpage; 84 int sc_window; 85 86 int sc_flags; 87 #define BMD_OPENBLK (0x01) 88 #define BMD_OPENCHR (0x02) 89 #define BMD_OPEN (BMD_OPENBLK | BMD_OPENCHR) 90 }; 91 92 static int bmd_match(device_t, cfdata_t, void *); 93 static void bmd_attach(device_t, device_t, void *); 94 static int bmd_getdisklabel(struct bmd_softc *, dev_t); 95 96 extern struct cfdriver bmd_cd; 97 98 CFATTACH_DECL_NEW(bmd, sizeof(struct bmd_softc), 99 bmd_match, bmd_attach, NULL, NULL); 100 101 dev_type_open(bmdopen); 102 dev_type_close(bmdclose); 103 dev_type_read(bmdread); 104 dev_type_write(bmdwrite); 105 dev_type_ioctl(bmdioctl); 106 dev_type_strategy(bmdstrategy); 107 dev_type_dump(bmddump); 108 dev_type_size(bmdsize); 109 110 const struct bdevsw bmd_bdevsw = { 111 bmdopen, bmdclose, bmdstrategy, bmdioctl, bmddump, bmdsize, D_DISK 112 }; 113 114 const struct cdevsw bmd_cdevsw = { 115 bmdopen, bmdclose, bmdread, bmdwrite, bmdioctl, 116 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 117 }; 118 119 struct dkdriver bmddkdriver = { bmdstrategy }; 120 121 static int 122 bmd_match(device_t parent, cfdata_t cf, void *aux) 123 { 124 struct intio_attach_args *ia = aux; 125 bus_space_tag_t iot = ia->ia_bst; 126 bus_space_handle_t ioh; 127 128 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 129 ia->ia_addr = BMD_ADDR1; 130 131 /* fixed parameter */ 132 if (ia->ia_addr != BMD_ADDR1 && ia->ia_addr != BMD_ADDR2) 133 return (0); 134 135 if (badaddr(INTIO_ADDR(ia->ia_addr))) 136 return (0); 137 138 ia->ia_size = 2; 139 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) 140 return (0); 141 142 bus_space_unmap(iot, ioh, ia->ia_size); 143 144 return (1); 145 } 146 147 static void 148 bmd_attach(device_t parent, device_t self, void *aux) 149 { 150 struct bmd_softc *sc = device_private(self); 151 struct intio_attach_args *ia = aux; 152 bus_space_tag_t iot = ia->ia_bst; 153 bus_space_handle_t ioh; 154 u_int8_t r; 155 156 aprint_normal(": Nereid Bank Memory Disk\n"); 157 158 /* Map I/O space */ 159 ia->ia_size = 2; 160 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) { 161 aprint_error_dev(self, "can't map I/O space\n"); 162 return; 163 } 164 165 sc->sc_iot = iot; 166 sc->sc_ioh = ioh; 167 168 /* read control register */ 169 r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, BMD_CTRL); 170 171 /* check enable-bit */ 172 if ((r & BMD_CTRL_ENABLE) == 0) { 173 aprint_error_dev(self, "disabled by DIP-SW 8\n"); 174 return; 175 } 176 177 if ((r & BMD_CTRL_MEMORY)) 178 sc->sc_maxpage = 256; 179 else 180 sc->sc_maxpage = 64; 181 182 if ((r & BMD_CTRL_WINDOW)) 183 sc->sc_window = 0xef0000; 184 else 185 sc->sc_window = 0xee0000; 186 187 /* Map bank area */ 188 if (bus_space_map(iot, sc->sc_window, BMD_PAGESIZE, 0, &sc->sc_bank)) { 189 aprint_error_dev(self, "can't map bank area: 0x%x\n", 190 sc->sc_window); 191 return; 192 } 193 194 aprint_normal_dev(self, "%d MB, 0x%x(64KB) x %d pages\n", 195 (sc->sc_maxpage / 16), sc->sc_window, sc->sc_maxpage); 196 197 disk_init(&sc->sc_dkdev, device_xname(self), &bmddkdriver); 198 disk_attach(&sc->sc_dkdev); 199 } 200 201 int 202 bmdopen(dev_t dev, int oflags, int devtype, struct lwp *l) 203 { 204 struct bmd_softc *sc; 205 206 DPRINTF(("%s%d\n", __func__, unit)); 207 208 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 209 if (sc == NULL) 210 return ENXIO; 211 212 switch (devtype) { 213 case S_IFCHR: 214 sc->sc_flags |= BMD_OPENCHR; 215 break; 216 case S_IFBLK: 217 sc->sc_flags |= BMD_OPENBLK; 218 break; 219 } 220 221 bmd_getdisklabel(sc, dev); 222 223 return (0); 224 } 225 226 int 227 bmdclose(dev_t dev, int fflag, int devtype, struct lwp *l) 228 { 229 struct bmd_softc *sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 230 231 DPRINTF(("%s%d\n", __func__, BMD_UNIT(dev))); 232 233 switch (devtype) { 234 case S_IFCHR: 235 sc->sc_flags &= ~BMD_OPENCHR; 236 break; 237 case S_IFBLK: 238 sc->sc_flags &= ~BMD_OPENBLK; 239 break; 240 } 241 242 return (0); 243 } 244 245 void 246 bmdstrategy(struct buf *bp) 247 { 248 int unit = BMD_UNIT(bp->b_dev); 249 struct bmd_softc *sc; 250 int offset, disksize, resid; 251 int page, pg_offset, pg_resid; 252 void *data; 253 254 if (unit >= bmd_cd.cd_ndevs) { 255 bp->b_error = ENXIO; 256 goto done; 257 } 258 259 sc = device_lookup_private(&bmd_cd, BMD_UNIT(bp->b_dev)); 260 if (sc == NULL) { 261 bp->b_error = ENXIO; 262 goto done; 263 } 264 265 DPRINTF(("bmdstrategy: %s blkno %d bcount %ld:", 266 (bp->b_flags & B_READ) ? "read " : "write", 267 bp->b_blkno, bp->b_bcount)); 268 269 bp->b_resid = bp->b_bcount; 270 offset = (bp->b_blkno << DEV_BSHIFT); 271 disksize = sc->sc_maxpage * BMD_PAGESIZE; 272 if (offset >= disksize) { 273 /* EOF if read, EIO if write */ 274 if (bp->b_flags & B_READ) 275 goto done; 276 bp->b_error = EIO; 277 goto done; 278 } 279 280 resid = bp->b_resid; 281 if (resid > disksize - offset) 282 resid = disksize - offset; 283 284 data = bp->b_data; 285 do { 286 page = offset / BMD_PAGESIZE; 287 pg_offset = offset % BMD_PAGESIZE; 288 289 /* length */ 290 pg_resid = MIN(resid, BMD_PAGESIZE - pg_offset); 291 292 /* switch bank page */ 293 bus_space_write_1(sc->sc_iot, sc->sc_ioh, BMD_PAGE, page); 294 295 /* XXX we should use DMA transfer? */ 296 if ((bp->b_flags & B_READ)) { 297 bus_space_read_region_1(sc->sc_iot, sc->sc_bank, 298 pg_offset, data, pg_resid); 299 } else { 300 bus_space_write_region_1(sc->sc_iot, sc->sc_bank, 301 pg_offset, data, pg_resid); 302 } 303 304 data = (char *)data + pg_resid; 305 offset += pg_resid; 306 resid -= pg_resid; 307 bp->b_resid -= pg_resid; 308 } while (resid > 0); 309 310 DPRINTF(("\n")); 311 312 done: 313 biodone(bp); 314 } 315 316 int 317 bmdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 318 { 319 struct bmd_softc *sc; 320 struct disklabel dl; 321 int error; 322 323 DPRINTF(("%s%d %ld\n", __func__, BMD_UNIT(dev), cmd)); 324 325 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 326 if (sc == NULL) 327 return ENXIO; 328 329 switch (cmd) { 330 case DIOCGDINFO: 331 *(struct disklabel *)data = *(sc->sc_dkdev.dk_label); 332 break; 333 334 case DIOCWDINFO: 335 if ((flag & FWRITE) == 0) 336 return EBADF; 337 338 error = setdisklabel(&dl, (struct disklabel *)data, 0, NULL); 339 if (error) 340 return error; 341 error = writedisklabel(dev, bmdstrategy, &dl, NULL); 342 return error; 343 344 default: 345 return EINVAL; 346 } 347 return 0; 348 } 349 350 int 351 bmddump(dev_t dev, daddr_t blkno, void *va, size_t size) 352 { 353 354 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 355 return ENODEV; 356 } 357 358 int 359 bmdsize(dev_t dev) 360 { 361 struct bmd_softc *sc; 362 363 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 364 365 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 366 if (sc == NULL) 367 return 0; 368 369 return (sc->sc_maxpage * BMD_PAGESIZE) >> DEV_BSHIFT; 370 } 371 372 int 373 bmdread(dev_t dev, struct uio *uio, int ioflag) 374 { 375 return physio(bmdstrategy, NULL, dev, B_READ, minphys, uio); 376 } 377 378 int 379 bmdwrite(dev_t dev, struct uio *uio, int ioflag) 380 { 381 return physio(bmdstrategy, NULL, dev, B_WRITE, minphys, uio); 382 } 383 384 static int 385 bmd_getdisklabel(struct bmd_softc *sc, dev_t dev) 386 { 387 struct disklabel *lp; 388 int part; 389 390 part = DISKPART(dev); 391 lp = sc->sc_dkdev.dk_label; 392 memset(lp, 0, sizeof(struct disklabel)); 393 394 lp->d_secsize = BMD_BSIZE; 395 lp->d_nsectors = BLKS_PER_PAGE; 396 lp->d_ntracks = sc->sc_maxpage; 397 lp->d_ncylinders = 1; 398 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 399 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 400 401 lp->d_type = DTYPE_LD; 402 lp->d_rpm = 300; /* dummy */ 403 lp->d_interleave = 1; /* dummy? */ 404 405 lp->d_npartitions = part + 1; 406 lp->d_bbsize = 8192; 407 lp->d_sbsize = 8192; /* ? */ 408 409 lp->d_magic = DISKMAGIC; 410 lp->d_magic2 = DISKMAGIC; 411 lp->d_checksum = dkcksum(lp); 412 413 lp->d_partitions[part].p_size = lp->d_secperunit; 414 lp->d_partitions[part].p_fstype = FS_BSDFFS; 415 lp->d_partitions[part].p_fsize = 1024; 416 lp->d_partitions[part].p_frag = 8; 417 418 return (0); 419 } 420
Indexes created Tue Sep 30 17:09:57 GMT 2025