bmd.c revision 1.20
1 /* $NetBSD: bmd.c,v 1.20 2014/07/25 08:02:19 dholland 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Nereid bank memory disk 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: bmd.c,v 1.20 2014/07/25 08:02:19 dholland Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/buf.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/kernel.h> 41 #include <sys/stat.h> 42 #include <sys/disk.h> 43 #include <sys/disklabel.h> 44 #include <sys/ioctl.h> 45 #include <sys/fcntl.h> 46 #include <sys/proc.h> 47 48 #include <machine/bus.h> 49 #include <machine/cpu.h> 50 51 #include <arch/x68k/dev/intiovar.h> 52 53 #define BMD_ADDR1 (0xece3f0) 54 #define BMD_ADDR2 (0xecebf0) 55 56 #define BMD_PAGESIZE (0x10000) /* 64KB */ 57 #define BMD_BSIZE (512) 58 #define BLKS_PER_PAGE (BMD_PAGESIZE / BMD_BSIZE) 59 60 #define BMD_PAGE (0) 61 #define BMD_CTRL (1) 62 #define BMD_CTRL_ENABLE (0x80) /* DIP8: 1=Enable, 0=Disable */ 63 #define BMD_CTRL_MEMORY (0x40) /* 1=16M available, 0=4M available */ 64 #define BMD_CTRL_WINDOW (0x20) /* DIP6: 1=0xee0000, 0=0xef0000 */ 65 66 67 #define BMD_UNIT(dev) (minor(dev) / 8) 68 69 #ifdef BMD_DEBUG 70 #define DPRINTF(x) printf x 71 #else 72 #define DPRINTF(x) /* nothing */ 73 #endif 74 75 struct bmd_softc { 76 struct disk sc_dkdev; 77 bus_space_tag_t sc_iot; 78 bus_space_handle_t sc_ioh; 79 bus_space_handle_t sc_bank; 80 81 int sc_maxpage; 82 int sc_window; 83 84 int sc_flags; 85 #define BMD_OPENBLK (0x01) 86 #define BMD_OPENCHR (0x02) 87 #define BMD_OPEN (BMD_OPENBLK | BMD_OPENCHR) 88 }; 89 90 static int bmd_match(device_t, cfdata_t, void *); 91 static void bmd_attach(device_t, device_t, void *); 92 static int bmd_getdisklabel(struct bmd_softc *, dev_t); 93 94 extern struct cfdriver bmd_cd; 95 96 CFATTACH_DECL_NEW(bmd, sizeof(struct bmd_softc), 97 bmd_match, bmd_attach, NULL, NULL); 98 99 dev_type_open(bmdopen); 100 dev_type_close(bmdclose); 101 dev_type_read(bmdread); 102 dev_type_write(bmdwrite); 103 dev_type_ioctl(bmdioctl); 104 dev_type_strategy(bmdstrategy); 105 dev_type_dump(bmddump); 106 dev_type_size(bmdsize); 107 108 const struct bdevsw bmd_bdevsw = { 109 .d_open = bmdopen, 110 .d_close = bmdclose, 111 .d_strategy = bmdstrategy, 112 .d_ioctl = bmdioctl, 113 .d_dump = bmddump, 114 .d_psize = bmdsize, 115 .d_discard = nodiscard, 116 .d_flag = D_DISK 117 }; 118 119 const struct cdevsw bmd_cdevsw = { 120 .d_open = bmdopen, 121 .d_close = bmdclose, 122 .d_read = bmdread, 123 .d_write = bmdwrite, 124 .d_ioctl = bmdioctl, 125 .d_stop = nostop, 126 .d_tty = notty, 127 .d_poll = nopoll, 128 .d_mmap = nommap, 129 .d_kqfilter = nokqfilter, 130 .d_flag = D_DISK 131 }; 132 133 struct dkdriver bmddkdriver = { bmdstrategy }; 134 135 static int 136 bmd_match(device_t parent, cfdata_t cf, void *aux) 137 { 138 struct intio_attach_args *ia = aux; 139 bus_space_tag_t iot = ia->ia_bst; 140 bus_space_handle_t ioh; 141 int window; 142 int r; 143 144 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 145 ia->ia_addr = BMD_ADDR1; 146 147 /* fixed parameter */ 148 if (ia->ia_addr != BMD_ADDR1 && ia->ia_addr != BMD_ADDR2) 149 return (0); 150 151 /* Check CTRL addr */ 152 if (badaddr((void *)IIOV(ia->ia_addr))) 153 return (0); 154 155 ia->ia_size = 2; 156 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) 157 return (0); 158 159 /* Check window addr */ 160 r = bus_space_read_1(iot, ioh, BMD_CTRL); 161 bus_space_unmap(iot, ioh, ia->ia_size); 162 163 if ((r & BMD_CTRL_WINDOW)) 164 window = 0xef0000; 165 else 166 window = 0xee0000; 167 if (badaddr((void *)IIOV(window))) 168 return (0); 169 170 return (1); 171 } 172 173 static void 174 bmd_attach(device_t parent, device_t self, void *aux) 175 { 176 struct bmd_softc *sc = device_private(self); 177 struct intio_attach_args *ia = aux; 178 bus_space_tag_t iot = ia->ia_bst; 179 bus_space_handle_t ioh; 180 u_int8_t r; 181 182 aprint_normal(": Nereid Bank Memory Disk\n"); 183 184 /* Map I/O space */ 185 ia->ia_size = 2; 186 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) { 187 aprint_error_dev(self, "can't map I/O space\n"); 188 return; 189 } 190 191 sc->sc_iot = iot; 192 sc->sc_ioh = ioh; 193 194 /* read control register */ 195 r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, BMD_CTRL); 196 197 /* check enable-bit */ 198 if ((r & BMD_CTRL_ENABLE) == 0) { 199 aprint_error_dev(self, "disabled by DIP-SW 8\n"); 200 return; 201 } 202 203 if ((r & BMD_CTRL_MEMORY)) 204 sc->sc_maxpage = 256; 205 else 206 sc->sc_maxpage = 64; 207 208 if ((r & BMD_CTRL_WINDOW)) 209 sc->sc_window = 0xef0000; 210 else 211 sc->sc_window = 0xee0000; 212 213 /* Map bank area */ 214 if (bus_space_map(iot, sc->sc_window, BMD_PAGESIZE, 0, &sc->sc_bank)) { 215 aprint_error_dev(self, "can't map bank area: 0x%x\n", 216 sc->sc_window); 217 return; 218 } 219 220 aprint_normal_dev(self, "%d MB, 0x%x(64KB) x %d pages\n", 221 (sc->sc_maxpage / 16), sc->sc_window, sc->sc_maxpage); 222 223 disk_init(&sc->sc_dkdev, device_xname(self), &bmddkdriver); 224 disk_attach(&sc->sc_dkdev); 225 } 226 227 int 228 bmdopen(dev_t dev, int oflags, int devtype, struct lwp *l) 229 { 230 struct bmd_softc *sc; 231 232 DPRINTF(("%s%d\n", __func__, unit)); 233 234 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 235 if (sc == NULL) 236 return ENXIO; 237 238 switch (devtype) { 239 case S_IFCHR: 240 sc->sc_flags |= BMD_OPENCHR; 241 break; 242 case S_IFBLK: 243 sc->sc_flags |= BMD_OPENBLK; 244 break; 245 } 246 247 bmd_getdisklabel(sc, dev); 248 249 return (0); 250 } 251 252 int 253 bmdclose(dev_t dev, int fflag, int devtype, struct lwp *l) 254 { 255 struct bmd_softc *sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 256 257 DPRINTF(("%s%d\n", __func__, BMD_UNIT(dev))); 258 259 switch (devtype) { 260 case S_IFCHR: 261 sc->sc_flags &= ~BMD_OPENCHR; 262 break; 263 case S_IFBLK: 264 sc->sc_flags &= ~BMD_OPENBLK; 265 break; 266 } 267 268 return (0); 269 } 270 271 void 272 bmdstrategy(struct buf *bp) 273 { 274 int unit = BMD_UNIT(bp->b_dev); 275 struct bmd_softc *sc; 276 int offset, disksize, resid; 277 int page, pg_offset, pg_resid; 278 void *data; 279 280 if (unit >= bmd_cd.cd_ndevs) { 281 bp->b_error = ENXIO; 282 goto done; 283 } 284 285 sc = device_lookup_private(&bmd_cd, BMD_UNIT(bp->b_dev)); 286 if (sc == NULL) { 287 bp->b_error = ENXIO; 288 goto done; 289 } 290 291 DPRINTF(("bmdstrategy: %s blkno %d bcount %ld:", 292 (bp->b_flags & B_READ) ? "read " : "write", 293 bp->b_blkno, bp->b_bcount)); 294 295 bp->b_resid = bp->b_bcount; 296 offset = (bp->b_blkno << DEV_BSHIFT); 297 disksize = sc->sc_maxpage * BMD_PAGESIZE; 298 if (offset >= disksize) { 299 /* EOF if read, EIO if write */ 300 if (bp->b_flags & B_READ) 301 goto done; 302 bp->b_error = EIO; 303 goto done; 304 } 305 306 resid = bp->b_resid; 307 if (resid > disksize - offset) 308 resid = disksize - offset; 309 310 data = bp->b_data; 311 do { 312 page = offset / BMD_PAGESIZE; 313 pg_offset = offset % BMD_PAGESIZE; 314 315 /* length */ 316 pg_resid = MIN(resid, BMD_PAGESIZE - pg_offset); 317 318 /* switch bank page */ 319 bus_space_write_1(sc->sc_iot, sc->sc_ioh, BMD_PAGE, page); 320 321 /* XXX we should use DMA transfer? */ 322 if ((bp->b_flags & B_READ)) { 323 bus_space_read_region_1(sc->sc_iot, sc->sc_bank, 324 pg_offset, data, pg_resid); 325 } else { 326 bus_space_write_region_1(sc->sc_iot, sc->sc_bank, 327 pg_offset, data, pg_resid); 328 } 329 330 data = (char *)data + pg_resid; 331 offset += pg_resid; 332 resid -= pg_resid; 333 bp->b_resid -= pg_resid; 334 } while (resid > 0); 335 336 DPRINTF(("\n")); 337 338 done: 339 biodone(bp); 340 } 341 342 int 343 bmdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 344 { 345 struct bmd_softc *sc; 346 struct disklabel dl; 347 int error; 348 349 DPRINTF(("%s%d %ld\n", __func__, BMD_UNIT(dev), cmd)); 350 351 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 352 if (sc == NULL) 353 return ENXIO; 354 355 switch (cmd) { 356 case DIOCGDINFO: 357 *(struct disklabel *)data = *(sc->sc_dkdev.dk_label); 358 break; 359 360 case DIOCWDINFO: 361 if ((flag & FWRITE) == 0) 362 return EBADF; 363 364 error = setdisklabel(&dl, (struct disklabel *)data, 0, NULL); 365 if (error) 366 return error; 367 error = writedisklabel(dev, bmdstrategy, &dl, NULL); 368 return error; 369 370 default: 371 return EINVAL; 372 } 373 return 0; 374 } 375 376 int 377 bmddump(dev_t dev, daddr_t blkno, void *va, size_t size) 378 { 379 380 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 381 return ENODEV; 382 } 383 384 int 385 bmdsize(dev_t dev) 386 { 387 struct bmd_softc *sc; 388 389 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 390 391 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 392 if (sc == NULL) 393 return 0; 394 395 return (sc->sc_maxpage * BMD_PAGESIZE) >> DEV_BSHIFT; 396 } 397 398 int 399 bmdread(dev_t dev, struct uio *uio, int ioflag) 400 { 401 return physio(bmdstrategy, NULL, dev, B_READ, minphys, uio); 402 } 403 404 int 405 bmdwrite(dev_t dev, struct uio *uio, int ioflag) 406 { 407 return physio(bmdstrategy, NULL, dev, B_WRITE, minphys, uio); 408 } 409 410 static int 411 bmd_getdisklabel(struct bmd_softc *sc, dev_t dev) 412 { 413 struct disklabel *lp; 414 int part; 415 416 part = DISKPART(dev); 417 lp = sc->sc_dkdev.dk_label; 418 memset(lp, 0, sizeof(struct disklabel)); 419 420 lp->d_secsize = BMD_BSIZE; 421 lp->d_nsectors = BLKS_PER_PAGE; 422 lp->d_ntracks = sc->sc_maxpage; 423 lp->d_ncylinders = 1; 424 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 425 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 426 427 lp->d_type = DTYPE_LD; 428 lp->d_rpm = 300; /* dummy */ 429 lp->d_interleave = 1; /* dummy? */ 430 431 lp->d_npartitions = part + 1; 432 lp->d_bbsize = 8192; 433 lp->d_sbsize = 8192; /* ? */ 434 435 lp->d_magic = DISKMAGIC; 436 lp->d_magic2 = DISKMAGIC; 437 lp->d_checksum = dkcksum(lp); 438 439 lp->d_partitions[part].p_size = lp->d_secperunit; 440 lp->d_partitions[part].p_fstype = FS_BSDFFS; 441 lp->d_partitions[part].p_fsize = 1024; 442 lp->d_partitions[part].p_frag = 8; 443 444 return (0); 445 } 446
Indexes created Tue Sep 30 17:09:57 GMT 2025