bmd.c revision 1.19
1 /* $NetBSD: bmd.c,v 1.19 2014/03/16 05:20:26 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 1.19 2014/03/16 05:20:26 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_flag = D_DISK 116 }; 117 118 const struct cdevsw bmd_cdevsw = { 119 .d_open = bmdopen, 120 .d_close = bmdclose, 121 .d_read = bmdread, 122 .d_write = bmdwrite, 123 .d_ioctl = bmdioctl, 124 .d_stop = nostop, 125 .d_tty = notty, 126 .d_poll = nopoll, 127 .d_mmap = nommap, 128 .d_kqfilter = nokqfilter, 129 .d_flag = D_DISK 130 }; 131 132 struct dkdriver bmddkdriver = { bmdstrategy }; 133 134 static int 135 bmd_match(device_t parent, cfdata_t cf, void *aux) 136 { 137 struct intio_attach_args *ia = aux; 138 bus_space_tag_t iot = ia->ia_bst; 139 bus_space_handle_t ioh; 140 int window; 141 int r; 142 143 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 144 ia->ia_addr = BMD_ADDR1; 145 146 /* fixed parameter */ 147 if (ia->ia_addr != BMD_ADDR1 && ia->ia_addr != BMD_ADDR2) 148 return (0); 149 150 /* Check CTRL addr */ 151 if (badaddr((void *)IIOV(ia->ia_addr))) 152 return (0); 153 154 ia->ia_size = 2; 155 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) 156 return (0); 157 158 /* Check window addr */ 159 r = bus_space_read_1(iot, ioh, BMD_CTRL); 160 bus_space_unmap(iot, ioh, ia->ia_size); 161 162 if ((r & BMD_CTRL_WINDOW)) 163 window = 0xef0000; 164 else 165 window = 0xee0000; 166 if (badaddr((void *)IIOV(window))) 167 return (0); 168 169 return (1); 170 } 171 172 static void 173 bmd_attach(device_t parent, device_t self, void *aux) 174 { 175 struct bmd_softc *sc = device_private(self); 176 struct intio_attach_args *ia = aux; 177 bus_space_tag_t iot = ia->ia_bst; 178 bus_space_handle_t ioh; 179 u_int8_t r; 180 181 aprint_normal(": Nereid Bank Memory Disk\n"); 182 183 /* Map I/O space */ 184 ia->ia_size = 2; 185 if (bus_space_map(iot, ia->ia_addr, ia->ia_size, 0, &ioh)) { 186 aprint_error_dev(self, "can't map I/O space\n"); 187 return; 188 } 189 190 sc->sc_iot = iot; 191 sc->sc_ioh = ioh; 192 193 /* read control register */ 194 r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, BMD_CTRL); 195 196 /* check enable-bit */ 197 if ((r & BMD_CTRL_ENABLE) == 0) { 198 aprint_error_dev(self, "disabled by DIP-SW 8\n"); 199 return; 200 } 201 202 if ((r & BMD_CTRL_MEMORY)) 203 sc->sc_maxpage = 256; 204 else 205 sc->sc_maxpage = 64; 206 207 if ((r & BMD_CTRL_WINDOW)) 208 sc->sc_window = 0xef0000; 209 else 210 sc->sc_window = 0xee0000; 211 212 /* Map bank area */ 213 if (bus_space_map(iot, sc->sc_window, BMD_PAGESIZE, 0, &sc->sc_bank)) { 214 aprint_error_dev(self, "can't map bank area: 0x%x\n", 215 sc->sc_window); 216 return; 217 } 218 219 aprint_normal_dev(self, "%d MB, 0x%x(64KB) x %d pages\n", 220 (sc->sc_maxpage / 16), sc->sc_window, sc->sc_maxpage); 221 222 disk_init(&sc->sc_dkdev, device_xname(self), &bmddkdriver); 223 disk_attach(&sc->sc_dkdev); 224 } 225 226 int 227 bmdopen(dev_t dev, int oflags, int devtype, struct lwp *l) 228 { 229 struct bmd_softc *sc; 230 231 DPRINTF(("%s%d\n", __func__, unit)); 232 233 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 234 if (sc == NULL) 235 return ENXIO; 236 237 switch (devtype) { 238 case S_IFCHR: 239 sc->sc_flags |= BMD_OPENCHR; 240 break; 241 case S_IFBLK: 242 sc->sc_flags |= BMD_OPENBLK; 243 break; 244 } 245 246 bmd_getdisklabel(sc, dev); 247 248 return (0); 249 } 250 251 int 252 bmdclose(dev_t dev, int fflag, int devtype, struct lwp *l) 253 { 254 struct bmd_softc *sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 255 256 DPRINTF(("%s%d\n", __func__, BMD_UNIT(dev))); 257 258 switch (devtype) { 259 case S_IFCHR: 260 sc->sc_flags &= ~BMD_OPENCHR; 261 break; 262 case S_IFBLK: 263 sc->sc_flags &= ~BMD_OPENBLK; 264 break; 265 } 266 267 return (0); 268 } 269 270 void 271 bmdstrategy(struct buf *bp) 272 { 273 int unit = BMD_UNIT(bp->b_dev); 274 struct bmd_softc *sc; 275 int offset, disksize, resid; 276 int page, pg_offset, pg_resid; 277 void *data; 278 279 if (unit >= bmd_cd.cd_ndevs) { 280 bp->b_error = ENXIO; 281 goto done; 282 } 283 284 sc = device_lookup_private(&bmd_cd, BMD_UNIT(bp->b_dev)); 285 if (sc == NULL) { 286 bp->b_error = ENXIO; 287 goto done; 288 } 289 290 DPRINTF(("bmdstrategy: %s blkno %d bcount %ld:", 291 (bp->b_flags & B_READ) ? "read " : "write", 292 bp->b_blkno, bp->b_bcount)); 293 294 bp->b_resid = bp->b_bcount; 295 offset = (bp->b_blkno << DEV_BSHIFT); 296 disksize = sc->sc_maxpage * BMD_PAGESIZE; 297 if (offset >= disksize) { 298 /* EOF if read, EIO if write */ 299 if (bp->b_flags & B_READ) 300 goto done; 301 bp->b_error = EIO; 302 goto done; 303 } 304 305 resid = bp->b_resid; 306 if (resid > disksize - offset) 307 resid = disksize - offset; 308 309 data = bp->b_data; 310 do { 311 page = offset / BMD_PAGESIZE; 312 pg_offset = offset % BMD_PAGESIZE; 313 314 /* length */ 315 pg_resid = MIN(resid, BMD_PAGESIZE - pg_offset); 316 317 /* switch bank page */ 318 bus_space_write_1(sc->sc_iot, sc->sc_ioh, BMD_PAGE, page); 319 320 /* XXX we should use DMA transfer? */ 321 if ((bp->b_flags & B_READ)) { 322 bus_space_read_region_1(sc->sc_iot, sc->sc_bank, 323 pg_offset, data, pg_resid); 324 } else { 325 bus_space_write_region_1(sc->sc_iot, sc->sc_bank, 326 pg_offset, data, pg_resid); 327 } 328 329 data = (char *)data + pg_resid; 330 offset += pg_resid; 331 resid -= pg_resid; 332 bp->b_resid -= pg_resid; 333 } while (resid > 0); 334 335 DPRINTF(("\n")); 336 337 done: 338 biodone(bp); 339 } 340 341 int 342 bmdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 343 { 344 struct bmd_softc *sc; 345 struct disklabel dl; 346 int error; 347 348 DPRINTF(("%s%d %ld\n", __func__, BMD_UNIT(dev), cmd)); 349 350 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 351 if (sc == NULL) 352 return ENXIO; 353 354 switch (cmd) { 355 case DIOCGDINFO: 356 *(struct disklabel *)data = *(sc->sc_dkdev.dk_label); 357 break; 358 359 case DIOCWDINFO: 360 if ((flag & FWRITE) == 0) 361 return EBADF; 362 363 error = setdisklabel(&dl, (struct disklabel *)data, 0, NULL); 364 if (error) 365 return error; 366 error = writedisklabel(dev, bmdstrategy, &dl, NULL); 367 return error; 368 369 default: 370 return EINVAL; 371 } 372 return 0; 373 } 374 375 int 376 bmddump(dev_t dev, daddr_t blkno, void *va, size_t size) 377 { 378 379 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 380 return ENODEV; 381 } 382 383 int 384 bmdsize(dev_t dev) 385 { 386 struct bmd_softc *sc; 387 388 DPRINTF(("%s%d ", __func__, BMD_UNIT(dev))); 389 390 sc = device_lookup_private(&bmd_cd, BMD_UNIT(dev)); 391 if (sc == NULL) 392 return 0; 393 394 return (sc->sc_maxpage * BMD_PAGESIZE) >> DEV_BSHIFT; 395 } 396 397 int 398 bmdread(dev_t dev, struct uio *uio, int ioflag) 399 { 400 return physio(bmdstrategy, NULL, dev, B_READ, minphys, uio); 401 } 402 403 int 404 bmdwrite(dev_t dev, struct uio *uio, int ioflag) 405 { 406 return physio(bmdstrategy, NULL, dev, B_WRITE, minphys, uio); 407 } 408 409 static int 410 bmd_getdisklabel(struct bmd_softc *sc, dev_t dev) 411 { 412 struct disklabel *lp; 413 int part; 414 415 part = DISKPART(dev); 416 lp = sc->sc_dkdev.dk_label; 417 memset(lp, 0, sizeof(struct disklabel)); 418 419 lp->d_secsize = BMD_BSIZE; 420 lp->d_nsectors = BLKS_PER_PAGE; 421 lp->d_ntracks = sc->sc_maxpage; 422 lp->d_ncylinders = 1; 423 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 424 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 425 426 lp->d_type = DTYPE_LD; 427 lp->d_rpm = 300; /* dummy */ 428 lp->d_interleave = 1; /* dummy? */ 429 430 lp->d_npartitions = part + 1; 431 lp->d_bbsize = 8192; 432 lp->d_sbsize = 8192; /* ? */ 433 434 lp->d_magic = DISKMAGIC; 435 lp->d_magic2 = DISKMAGIC; 436 lp->d_checksum = dkcksum(lp); 437 438 lp->d_partitions[part].p_size = lp->d_secperunit; 439 lp->d_partitions[part].p_fstype = FS_BSDFFS; 440 lp->d_partitions[part].p_fsize = 1024; 441 lp->d_partitions[part].p_frag = 8; 442 443 return (0); 444 } 445
Indexes created Tue Sep 30 20:09:53 GMT 2025