sys/dev/flash/at45d.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2006 M. Warner Losh
   5  * Copyright (c) 2011-2012 Ian Lepore
   6  * Copyright (c) 2012 Marius Strobl <marius@FreeBSD.org>
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/bio.h>
  36 #include <sys/bus.h>
  37 #include <sys/conf.h>
  38 #include <sys/endian.h>
  39 #include <sys/kernel.h>
  40 #include <sys/kthread.h>
  41 #include <sys/lock.h>
  42 #include <sys/mbuf.h>
  43 #include <sys/malloc.h>
  44 #include <sys/module.h>
  45 #include <sys/mutex.h>
  46 #include <geom/geom_disk.h>
  47
  48 #include <dev/spibus/spi.h>
  49 #include "spibus_if.h"
  50
  51 #include "opt_platform.h"
  52
  53 #ifdef FDT
  54 #include <dev/fdt/fdt_common.h>
  55 #include <dev/ofw/ofw_bus_subr.h>
  56 #include <dev/ofw/openfirm.h>
  57
  58 static struct ofw_compat_data compat_data[] = {
  59         { "atmel,at45",         1 },
  60         { "atmel,dataflash",    1 },
  61         { NULL,                 0 },
  62 };
  63 #endif
  64
  65 /* This is the information returned by the MANUFACTURER_ID command. */
  66 struct at45d_mfg_info {
  67         uint32_t        jedec_id; /* Mfg ID, DevId1, DevId2, ExtLen */
  68         uint16_t        ext_id;   /* ExtId1, ExtId2 */
  69 };
  70
  71 /*
  72  * This is an entry in our table of metadata describing the chips.  We match on
  73  * both jedec id and extended id info returned by the MANUFACTURER_ID command.
  74  */
  75 struct at45d_flash_ident
  76 {
  77         const char      *name;
  78         uint32_t        jedec;
  79         uint16_t        extid;
  80         uint16_t        extmask;
  81         uint16_t        pagecount;
  82         uint16_t        pageoffset;
  83         uint16_t        pagesize;
  84         uint16_t        pagesize2n;
  85 };
  86
  87 struct at45d_softc
  88 {
  89         struct bio_queue_head   bio_queue;
  90         struct mtx              sc_mtx;
  91         struct disk             *disk;
  92         struct proc             *p;
  93         device_t                dev;
  94         u_int                   taskstate;
  95         uint16_t                pagecount;
  96         uint16_t                pageoffset;
  97         uint16_t                pagesize;
  98         void                    *dummybuf;
  99 };
 100
 101 #define TSTATE_STOPPED  0
 102 #define TSTATE_STOPPING 1
 103 #define TSTATE_RUNNING  2
 104
 105 #define AT45D_LOCK(_sc)                 mtx_lock(&(_sc)->sc_mtx)
 106 #define AT45D_UNLOCK(_sc)               mtx_unlock(&(_sc)->sc_mtx)
 107 #define AT45D_LOCK_INIT(_sc) \
 108         mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
 109             "at45d", MTX_DEF)
 110 #define AT45D_LOCK_DESTROY(_sc)         mtx_destroy(&_sc->sc_mtx);
 111 #define AT45D_ASSERT_LOCKED(_sc)        mtx_assert(&_sc->sc_mtx, MA_OWNED);
 112 #define AT45D_ASSERT_UNLOCKED(_sc)      mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
 113
 114 /* bus entry points */
 115 static device_attach_t at45d_attach;
 116 static device_detach_t at45d_detach;
 117 static device_probe_t at45d_probe;
 118
 119 /* disk routines */
 120 static int at45d_close(struct disk *dp);
 121 static int at45d_open(struct disk *dp);
 122 static int at45d_getattr(struct bio *bp);
 123 static void at45d_strategy(struct bio *bp);
 124 static void at45d_task(void *arg);
 125
 126 /* helper routines */
 127 static void at45d_delayed_attach(void *xsc);
 128 static int at45d_get_mfg_info(device_t dev, struct at45d_mfg_info *resp);
 129 static int at45d_get_status(device_t dev, uint8_t *status);
 130 static int at45d_wait_ready(device_t dev, uint8_t *status);
 131
 132 #define PAGE_TO_BUFFER_TRANSFER         0x53
 133 #define PAGE_TO_BUFFER_COMPARE          0x60
 134 #define PROGRAM_THROUGH_BUFFER          0x82
 135 #define MANUFACTURER_ID                 0x9f
 136 #define STATUS_REGISTER_READ            0xd7
 137 #define CONTINUOUS_ARRAY_READ           0xe8
 138
 139 #define STATUS_READY                    (1u << 7)
 140 #define STATUS_CMPFAIL                  (1u << 6)
 141 #define STATUS_PAGE2N                   (1u << 0)
 142
 143 /*
 144  * Metadata for supported chips.
 145  *
 146  * The jedec id in this table includes the extended id length byte.  A match is
 147  * based on both jedec id and extended id matching.  The chip's extended id (not
 148  * present in most chips) is ANDed with ExtMask and the result is compared to
 149  * ExtId.  If a chip only returns 1 ext id byte it will be in the upper 8 bits
 150  * of ExtId in this table.
 151  *
 152  * A sectorsize2n != 0 is used to indicate that a device optionally supports
 153  * 2^N byte pages.  If support for the latter is enabled, the sector offset
 154  * has to be reduced by one.
 155  */
 156 static const struct at45d_flash_ident at45d_flash_devices[] = {
 157         /* Part Name    Jedec ID    ExtId   ExtMask PgCnt Offs PgSz PgSz2n */
 158         { "AT45DB011B", 0x1f220000, 0x0000, 0x0000,   512,  9,  264,  256 },
 159         { "AT45DB021B", 0x1f230000, 0x0000, 0x0000,  1024,  9,  264,  256 },
 160         { "AT45DB041x", 0x1f240000, 0x0000, 0x0000,  2028,  9,  264,  256 },
 161         { "AT45DB081B", 0x1f250000, 0x0000, 0x0000,  4096,  9,  264,  256 },
 162         { "AT45DB161x", 0x1f260000, 0x0000, 0x0000,  4096, 10,  528,  512 },
 163         { "AT45DB321x", 0x1f270000, 0x0000, 0x0000,  8192, 10,  528,    0 },
 164         { "AT45DB321x", 0x1f270100, 0x0000, 0x0000,  8192, 10,  528,  512 },
 165         { "AT45DB641E", 0x1f280001, 0x0000, 0xff00, 32768,  9,  264,  256 },
 166         { "AT45DB642x", 0x1f280000, 0x0000, 0x0000,  8192, 11, 1056, 1024 },
 167 };
 168
 169 static int
 170 at45d_get_status(device_t dev, uint8_t *status)
 171 {
 172         uint8_t rxBuf[8], txBuf[8];
 173         struct spi_command cmd;
 174         int err;
 175
 176         memset(&cmd, 0, sizeof(cmd));
 177         memset(txBuf, 0, sizeof(txBuf));
 178         memset(rxBuf, 0, sizeof(rxBuf));
 179
 180         txBuf[0] = STATUS_REGISTER_READ;
 181         cmd.tx_cmd = txBuf;
 182         cmd.rx_cmd = rxBuf;
 183         cmd.rx_cmd_sz = cmd.tx_cmd_sz = 2;
 184         err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
 185         *status = rxBuf[1];
 186         return (err);
 187 }
 188
 189 static int
 190 at45d_get_mfg_info(device_t dev, struct at45d_mfg_info *resp)
 191 {
 192         uint8_t rxBuf[8], txBuf[8];
 193         struct spi_command cmd;
 194         int err;
 195
 196         memset(&cmd, 0, sizeof(cmd));
 197         memset(txBuf, 0, sizeof(txBuf));
 198         memset(rxBuf, 0, sizeof(rxBuf));
 199
 200         txBuf[0] = MANUFACTURER_ID;
 201         cmd.tx_cmd = &txBuf;
 202         cmd.rx_cmd = &rxBuf;
 203         cmd.tx_cmd_sz = cmd.rx_cmd_sz = 7;
 204         err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
 205         if (err)
 206                 return (err);
 207
 208         resp->jedec_id = be32dec(rxBuf + 1);
 209         resp->ext_id   = be16dec(rxBuf + 5);
 210
 211         return (0);
 212 }
 213
 214 static int
 215 at45d_wait_ready(device_t dev, uint8_t *status)
 216 {
 217         struct timeval now, tout;
 218         int err;
 219
 220         getmicrouptime(&tout);
 221         tout.tv_sec += 3;
 222         do {
 223                 getmicrouptime(&now);
 224                 if (now.tv_sec > tout.tv_sec)
 225                         err = ETIMEDOUT;
 226                 else
 227                         err = at45d_get_status(dev, status);
 228         } while (err == 0 && !(*status & STATUS_READY));
 229         return (err);
 230 }
 231
 232 static int
 233 at45d_probe(device_t dev)
 234 {
 235         int rv;
 236
 237 #ifdef FDT
 238         if (!ofw_bus_status_okay(dev))
 239                 return (ENXIO);
 240
 241         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
 242                 return (ENXIO);
 243
 244         rv = BUS_PROBE_DEFAULT;
 245 #else
 246         rv = BUS_PROBE_NOWILDCARD;
 247 #endif
 248
 249         device_set_desc(dev, "AT45D Flash Family");
 250         return (rv);
 251 }
 252
 253 static int
 254 at45d_attach(device_t dev)
 255 {
 256         struct at45d_softc *sc;
 257
 258         sc = device_get_softc(dev);
 259         sc->dev = dev;
 260         AT45D_LOCK_INIT(sc);
 261
 262         config_intrhook_oneshot(at45d_delayed_attach, sc);
 263         return (0);
 264 }
 265
 266 static int
 267 at45d_detach(device_t dev)
 268 {
 269         struct at45d_softc *sc;
 270         int err;
 271
 272         sc = device_get_softc(dev);
 273         err = 0;
 274
 275         AT45D_LOCK(sc);
 276         if (sc->taskstate == TSTATE_RUNNING) {
 277                 sc->taskstate = TSTATE_STOPPING;
 278                 wakeup(sc);
 279                 while (err == 0 && sc->taskstate != TSTATE_STOPPED) {
 280                         err = msleep(sc, &sc->sc_mtx, 0, "at45dt", hz * 3);
 281                         if (err != 0) {
 282                                 sc->taskstate = TSTATE_RUNNING;
 283                                 device_printf(sc->dev,
 284                                     "Failed to stop queue task\n");
 285                         }
 286                 }
 287         }
 288         AT45D_UNLOCK(sc);
 289
 290         if (err == 0 && sc->taskstate == TSTATE_STOPPED) {
 291                 if (sc->disk) {
 292                         disk_destroy(sc->disk);
 293                         bioq_flush(&sc->bio_queue, NULL, ENXIO);
 294                         free(sc->dummybuf, M_DEVBUF);
 295                 }
 296                 AT45D_LOCK_DESTROY(sc);
 297         }
 298         return (err);
 299 }
 300
 301 static void
 302 at45d_delayed_attach(void *xsc)
 303 {
 304         struct at45d_softc *sc;
 305         struct at45d_mfg_info mfginfo;
 306         const struct at45d_flash_ident *ident;
 307         u_int i;
 308         int sectorsize;
 309         uint32_t jedec;
 310         uint16_t pagesize;
 311         uint8_t status;
 312
 313         sc = xsc;
 314         ident = NULL;
 315         jedec = 0;
 316
 317         if (at45d_wait_ready(sc->dev, &status) != 0) {
 318                 device_printf(sc->dev, "Error waiting for device-ready.\n");
 319                 return;
 320         }
 321         if (at45d_get_mfg_info(sc->dev, &mfginfo) != 0) {
 322                 device_printf(sc->dev, "Failed to get ID.\n");
 323                 return;
 324         }
 325         for (i = 0; i < nitems(at45d_flash_devices); i++) {
 326                 ident = &at45d_flash_devices[i];
 327                 if (mfginfo.jedec_id == ident->jedec &&
 328                     (mfginfo.ext_id & ident->extmask) == ident->extid) {
 329                         break;
 330                 }
 331         }
 332         if (i == nitems(at45d_flash_devices)) {
 333                 device_printf(sc->dev, "JEDEC 0x%x not in list.\n", jedec);
 334                 return;
 335         }
 336
 337         sc->pagecount = ident->pagecount;
 338         sc->pageoffset = ident->pageoffset;
 339         if (ident->pagesize2n != 0 && (status & STATUS_PAGE2N)) {
 340                 sc->pageoffset -= 1;
 341                 pagesize = ident->pagesize2n;
 342         } else
 343                 pagesize = ident->pagesize;
 344         sc->pagesize = pagesize;
 345
 346         /*
 347          * By default we set up a disk with a sector size that matches the
 348          * device page size.  If there is a device hint or fdt property
 349          * requesting a different size, use that, as long as it is a multiple of
 350          * the device page size).
 351          */
 352         sectorsize = pagesize;
 353 #ifdef FDT
 354         {
 355                 pcell_t size;
 356                 if (OF_getencprop(ofw_bus_get_node(sc->dev),
 357                     "freebsd,sectorsize", &size, sizeof(size)) > 0)
 358                         sectorsize = size;
 359         }
 360 #endif
 361         resource_int_value(device_get_name(sc->dev), device_get_unit(sc->dev),
 362             "sectorsize", &sectorsize);
 363
 364         if ((sectorsize % pagesize) != 0) {
 365                 device_printf(sc->dev, "Invalid sectorsize %d, "
 366                     "must be a multiple of %d\n", sectorsize, pagesize);
 367                 return;
 368         }
 369
 370         sc->dummybuf = malloc(pagesize, M_DEVBUF, M_WAITOK | M_ZERO);
 371
 372         sc->disk = disk_alloc();
 373         sc->disk->d_open = at45d_open;
 374         sc->disk->d_close = at45d_close;
 375         sc->disk->d_strategy = at45d_strategy;
 376         sc->disk->d_getattr = at45d_getattr;
 377         sc->disk->d_name = "flash/at45d";
 378         sc->disk->d_drv1 = sc;
 379         sc->disk->d_maxsize = DFLTPHYS;
 380         sc->disk->d_sectorsize = sectorsize;
 381         sc->disk->d_mediasize = pagesize * ident->pagecount;
 382         sc->disk->d_unit = device_get_unit(sc->dev);
 383         disk_create(sc->disk, DISK_VERSION);
 384         bioq_init(&sc->bio_queue);
 385         kproc_create(&at45d_task, sc, &sc->p, 0, 0, "task: at45d flash");
 386         sc->taskstate = TSTATE_RUNNING;
 387         device_printf(sc->dev,
 388             "%s, %d bytes per page, %d pages; %d KBytes; disk sector size %d\n",
 389             ident->name, pagesize, ident->pagecount,
 390             (pagesize * ident->pagecount) / 1024, sectorsize);
 391 }
 392
 393 static int
 394 at45d_open(struct disk *dp)
 395 {
 396
 397         return (0);
 398 }
 399
 400 static int
 401 at45d_close(struct disk *dp)
 402 {
 403
 404         return (0);
 405 }
 406
 407 static int
 408 at45d_getattr(struct bio *bp)
 409 {
 410         struct at45d_softc *sc;
 411
 412         /*
 413          * This function exists to support geom_flashmap and fdt_slicer.
 414          */
 415
 416         if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL)
 417                 return (ENXIO);
 418         if (strcmp(bp->bio_attribute, "SPI::device") != 0)
 419                 return (-1);
 420         sc = bp->bio_disk->d_drv1;
 421         if (bp->bio_length != sizeof(sc->dev))
 422                 return (EFAULT);
 423         bcopy(&sc->dev, bp->bio_data, sizeof(sc->dev));
 424         return (0);
 425 }
 426
 427 static void
 428 at45d_strategy(struct bio *bp)
 429 {
 430         struct at45d_softc *sc;
 431
 432         sc = (struct at45d_softc *)bp->bio_disk->d_drv1;
 433         AT45D_LOCK(sc);
 434         bioq_disksort(&sc->bio_queue, bp);
 435         wakeup(sc);
 436         AT45D_UNLOCK(sc);
 437 }
 438
 439 static void
 440 at45d_task(void *arg)
 441 {
 442         uint8_t rxBuf[8], txBuf[8];
 443         struct at45d_softc *sc;
 444         struct bio *bp;
 445         struct spi_command cmd;
 446         device_t dev, pdev;
 447         caddr_t buf;
 448         u_long len, resid;
 449         u_int addr, berr, err, offset, page;
 450         uint8_t status;
 451
 452         sc = (struct at45d_softc*)arg;
 453         dev = sc->dev;
 454         pdev = device_get_parent(dev);
 455         memset(&cmd, 0, sizeof(cmd));
 456         memset(txBuf, 0, sizeof(txBuf));
 457         memset(rxBuf, 0, sizeof(rxBuf));
 458         cmd.tx_cmd = txBuf;
 459         cmd.rx_cmd = rxBuf;
 460
 461         for (;;) {
 462                 AT45D_LOCK(sc);
 463                 do {
 464                         if (sc->taskstate == TSTATE_STOPPING) {
 465                                 sc->taskstate = TSTATE_STOPPED;
 466                                 AT45D_UNLOCK(sc);
 467                                 wakeup(sc);
 468                                 kproc_exit(0);
 469                         }
 470                         bp = bioq_takefirst(&sc->bio_queue);
 471                         if (bp == NULL)
 472                                 msleep(sc, &sc->sc_mtx, PRIBIO, "at45dq", 0);
 473                 } while (bp == NULL);
 474                 AT45D_UNLOCK(sc);
 475
 476                 berr = 0;
 477                 buf = bp->bio_data;
 478                 len = resid = bp->bio_bcount;
 479                 page = bp->bio_offset / sc->pagesize;
 480                 offset = bp->bio_offset % sc->pagesize;
 481
 482                 switch (bp->bio_cmd) {
 483                 case BIO_READ:
 484                         txBuf[0] = CONTINUOUS_ARRAY_READ;
 485                         cmd.tx_cmd_sz = cmd.rx_cmd_sz = 8;
 486                         cmd.tx_data = sc->dummybuf;
 487                         cmd.rx_data = buf;
 488                         break;
 489                 case BIO_WRITE:
 490                         cmd.tx_cmd_sz = cmd.rx_cmd_sz = 4;
 491                         cmd.tx_data = buf;
 492                         cmd.rx_data = sc->dummybuf;
 493                         if (resid + offset > sc->pagesize)
 494                                 len = sc->pagesize - offset;
 495                         break;
 496                 default:
 497                         berr = EINVAL;
 498                         goto out;
 499                 }
 500
 501                 /*
 502                  * NB: for BIO_READ, this loop is only traversed once.
 503                  */
 504                 while (resid > 0) {
 505                         if (page > sc->pagecount) {
 506                                 berr = EINVAL;
 507                                 goto out;
 508                         }
 509                         addr = page << sc->pageoffset;
 510                         if (bp->bio_cmd == BIO_WRITE) {
 511                                 /*
 512                                  * If writing less than a full page, transfer
 513                                  * the existing page to the buffer, so that our
 514                                  * PROGRAM_THROUGH_BUFFER below will preserve
 515                                  * the parts of the page we're not writing.
 516                                  */
 517                                 if (len != sc->pagesize) {
 518                                         txBuf[0] = PAGE_TO_BUFFER_TRANSFER;
 519                                         txBuf[1] = ((addr >> 16) & 0xff);
 520                                         txBuf[2] = ((addr >> 8) & 0xff);
 521                                         txBuf[3] = 0;
 522                                         cmd.tx_data_sz = cmd.rx_data_sz = 0;
 523                                         err = SPIBUS_TRANSFER(pdev, dev, &cmd);
 524                                         if (err == 0)
 525                                                 err = at45d_wait_ready(dev,
 526                                                     &status);
 527                                         if (err != 0) {
 528                                                 berr = EIO;
 529                                                 goto out;
 530                                         }
 531                                 }
 532                                 txBuf[0] = PROGRAM_THROUGH_BUFFER;
 533                         }
 534
 535                         addr += offset;
 536                         txBuf[1] = ((addr >> 16) & 0xff);
 537                         txBuf[2] = ((addr >> 8) & 0xff);
 538                         txBuf[3] = (addr & 0xff);
 539                         cmd.tx_data_sz = cmd.rx_data_sz = len;
 540                         err = SPIBUS_TRANSFER(pdev, dev, &cmd);
 541                         if (err == 0 && bp->bio_cmd != BIO_READ)
 542                                 err = at45d_wait_ready(dev, &status);
 543                         if (err != 0) {
 544                                 berr = EIO;
 545                                 goto out;
 546                         }
 547                         if (bp->bio_cmd == BIO_WRITE) {
 548                                 addr = page << sc->pageoffset;
 549                                 txBuf[0] = PAGE_TO_BUFFER_COMPARE;
 550                                 txBuf[1] = ((addr >> 16) & 0xff);
 551                                 txBuf[2] = ((addr >> 8) & 0xff);
 552                                 txBuf[3] = 0;
 553                                 cmd.tx_data_sz = cmd.rx_data_sz = 0;
 554                                 err = SPIBUS_TRANSFER(pdev, dev, &cmd);
 555                                 if (err == 0)
 556                                         err = at45d_wait_ready(dev, &status);
 557                                 if (err != 0 || (status & STATUS_CMPFAIL)) {
 558                                         device_printf(dev, "comparing page "
 559                                             "%d failed (status=0x%x)\n", page,
 560                                             status);
 561                                         berr = EIO;
 562                                         goto out;
 563                                 }
 564                         }
 565                         page++;
 566                         buf += len;
 567                         offset = 0;
 568                         resid -= len;
 569                         if (resid > sc->pagesize)
 570                                 len = sc->pagesize;
 571                         else
 572                                 len = resid;
 573                         if (bp->bio_cmd == BIO_READ)
 574                                 cmd.rx_data = buf;
 575                         else
 576                                 cmd.tx_data = buf;
 577                 }
 578  out:
 579                 if (berr != 0) {
 580                         bp->bio_flags |= BIO_ERROR;
 581                         bp->bio_error = berr;
 582                 }
 583                 bp->bio_resid = resid;
 584                 biodone(bp);
 585         }
 586 }
 587
 588 static devclass_t at45d_devclass;
 589
 590 static device_method_t at45d_methods[] = {
 591         /* Device interface */
 592         DEVMETHOD(device_probe,         at45d_probe),
 593         DEVMETHOD(device_attach,        at45d_attach),
 594         DEVMETHOD(device_detach,        at45d_detach),
 595
 596         DEVMETHOD_END
 597 };
 598
 599 static driver_t at45d_driver = {
 600         "at45d",
 601         at45d_methods,
 602         sizeof(struct at45d_softc),
 603 };
 604
 605 DRIVER_MODULE(at45d, spibus, at45d_driver, at45d_devclass, NULL, NULL);
 606 MODULE_DEPEND(at45d, spibus, 1, 1, 1);
 607 #ifdef FDT
 608 MODULE_DEPEND(at45d, fdt_slicer, 1, 1, 1);
 609 SPIBUS_PNP_INFO(compat_data);
 610 #endif
 611