sys/dev/flash/at45d.c

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