target/linux/brcm47xx/files-2.6.36/drivers/mtd/maps/bcm47xx-flash.c

   1 /*
   2  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
   3  *  Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
   4  *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
   5  *
   6  *  original functions for finding root filesystem from Mike Baker
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  *  Copyright 2001-2003, Broadcom Corporation
  29  *  All Rights Reserved.
  30  *
  31  *  THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
  32  *  KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  33  *  SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  34  *  FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  35  *
  36  *  Flash mapping for BCM947XX boards
  37  */
  38
  39 #include <linux/init.h>
  40 #include <linux/module.h>
  41 #include <linux/types.h>
  42 #include <linux/kernel.h>
  43 #include <linux/sched.h>
  44 #include <linux/wait.h>
  45 #include <linux/mtd/mtd.h>
  46 #include <linux/mtd/map.h>
  47 #ifdef CONFIG_MTD_PARTITIONS
  48 #include <linux/mtd/partitions.h>
  49 #endif
  50 #include <linux/crc32.h>
  51 #ifdef CONFIG_SSB
  52 #include <linux/ssb/ssb.h>
  53 #endif
  54 #include <asm/io.h>
  55 #include <asm/mach-bcm47xx/nvram.h>
  56 #include <asm/fw/cfe/cfe_api.h>
  57
  58
  59 #define TRX_MAGIC       0x30524448      /* "HDR0" */
  60 #define TRX_VERSION     1
  61 #define TRX_MAX_LEN     0x3A0000
  62 #define TRX_NO_HEADER   1               /* Do not write TRX header */
  63 #define TRX_GZ_FILES    0x2     /* Contains up to TRX_MAX_OFFSET individual gzip files */
  64 #define TRX_MAX_OFFSET  3
  65
  66 struct trx_header {
  67         u32 magic;              /* "HDR0" */
  68         u32 len;                /* Length of file including header */
  69         u32 crc32;              /* 32-bit CRC from flag_version to end of file */
  70         u32 flag_version;       /* 0:15 flags, 16:31 version */
  71         u32 offsets[TRX_MAX_OFFSET];    /* Offsets of partitions from start of header */
  72 };
  73
  74 /* for Edimax Print servers which use an additional header
  75  * then the firmware on flash looks like :
  76  * EDIMAX HEADER | TRX HEADER
  77  * As this header is 12 bytes long we have to handle it
  78  * and skip it to find the TRX header
  79  */
  80 #define EDIMAX_PS_HEADER_MAGIC  0x36315350 /*  "PS16"  */
  81 #define EDIMAX_PS_HEADER_LEN    0xc /* 12 bytes long for edimax header */
  82
  83 #define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
  84 #define NVRAM_SPACE 0x8000
  85 #define WINDOW_ADDR 0x1fc00000
  86 #define WINDOW_SIZE 0x400000
  87 #define BUSWIDTH 2
  88
  89 #define ROUTER_NETGEAR_WGR614L         1
  90 #define ROUTER_NETGEAR_WNR834B         2
  91 #define ROUTER_NETGEAR_WNDR3300        3
  92 #define ROUTER_NETGEAR_WNR3500L        4
  93
  94 #ifdef CONFIG_SSB
  95 extern struct ssb_bus ssb_bcm47xx;
  96 #endif
  97 static struct mtd_info *bcm47xx_mtd;
  98
  99 static void bcm47xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
 100 {
 101         if (len==1) {
 102                 memcpy_fromio(to, map->virt + from, len);
 103         } else {
 104                 int i;
 105                 u16 *dest = (u16 *) to;
 106                 u16 *src  = (u16 *) (map->virt + from);
 107                 for (i = 0; i < (len / 2); i++) {
 108                         dest[i] = src[i];
 109                 }
 110                 if (len & 1)
 111                         *((u8 *)dest+len-1) = src[i] & 0xff;
 112         }
 113 }
 114
 115 static struct map_info bcm47xx_map = {
 116         name: "Physically mapped flash",
 117         size: WINDOW_SIZE,
 118         bankwidth: BUSWIDTH,
 119         phys: WINDOW_ADDR,
 120 };
 121
 122 #ifdef CONFIG_MTD_PARTITIONS
 123
 124 static struct mtd_partition bcm47xx_parts[] = {
 125         { name: "cfe",  offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
 126         { name: "linux", offset: 0, size: 0, },
 127         { name: "rootfs", offset: 0, size: 0, },
 128         { name: "nvram", offset: 0, size: 0, },
 129         { name: NULL, },
 130 };
 131
 132 static int __init
 133 find_cfe_size(struct mtd_info *mtd, size_t size)
 134 {
 135         struct trx_header *trx;
 136         unsigned char buf[512];
 137         int off;
 138         size_t len;
 139         int blocksize;
 140
 141         trx = (struct trx_header *) buf;
 142
 143         blocksize = mtd->erasesize;
 144         if (blocksize < 0x10000)
 145                 blocksize = 0x10000;
 146
 147         for (off = (128*1024); off < size; off += blocksize) {
 148                 memset(buf, 0xe5, sizeof(buf));
 149
 150                 /*
 151                  * Read into buffer
 152                  */
 153                 if (mtd->read(mtd, off, sizeof(buf), &len, buf) ||
 154                     len != sizeof(buf))
 155                         continue;
 156
 157                 if (le32_to_cpu(trx->magic) == EDIMAX_PS_HEADER_MAGIC) {
 158                         if (mtd->read(mtd, off + EDIMAX_PS_HEADER_LEN,
 159                             sizeof(buf), &len, buf) || len != sizeof(buf)) {
 160                                 continue;
 161                         } else {
 162                                 printk(KERN_NOTICE"Found edimax header\n");
 163                         }
 164                 }
 165
 166                 /* found a TRX header */
 167                 if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
 168                         goto found;
 169                 }
 170         }
 171
 172         printk(KERN_NOTICE
 173                "%s: Couldn't find bootloader size\n",
 174                mtd->name);
 175         return -1;
 176
 177  found:
 178         printk(KERN_NOTICE "bootloader size: %d\n", off);
 179         return off;
 180
 181 }
 182
 183 /*
 184  * Copied from mtdblock.c
 185  *
 186  * Cache stuff...
 187  *
 188  * Since typical flash erasable sectors are much larger than what Linux's
 189  * buffer cache can handle, we must implement read-modify-write on flash
 190  * sectors for each block write requests.  To avoid over-erasing flash sectors
 191  * and to speed things up, we locally cache a whole flash sector while it is
 192  * being written to until a different sector is required.
 193  */
 194
 195 static void erase_callback(struct erase_info *done)
 196 {
 197         wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
 198         wake_up(wait_q);
 199 }
 200
 201 static int erase_write (struct mtd_info *mtd, unsigned long pos,
 202                         int len, const char *buf)
 203 {
 204         struct erase_info erase;
 205         DECLARE_WAITQUEUE(wait, current);
 206         wait_queue_head_t wait_q;
 207         size_t retlen;
 208         int ret;
 209
 210         /*
 211          * First, let's erase the flash block.
 212          */
 213
 214         init_waitqueue_head(&wait_q);
 215         erase.mtd = mtd;
 216         erase.callback = erase_callback;
 217         erase.addr = pos;
 218         erase.len = len;
 219         erase.priv = (u_long)&wait_q;
 220
 221         set_current_state(TASK_INTERRUPTIBLE);
 222         add_wait_queue(&wait_q, &wait);
 223
 224         ret = mtd->erase(mtd, &erase);
 225         if (ret) {
 226                 set_current_state(TASK_RUNNING);
 227                 remove_wait_queue(&wait_q, &wait);
 228                 printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
 229                                      "on \"%s\" failed\n",
 230                         pos, len, mtd->name);
 231                 return ret;
 232         }
 233
 234         schedule();  /* Wait for erase to finish. */
 235         remove_wait_queue(&wait_q, &wait);
 236
 237         /*
 238          * Next, write data to flash.
 239          */
 240
 241         ret = mtd->write (mtd, pos, len, &retlen, buf);
 242         if (ret)
 243                 return ret;
 244         if (retlen != len)
 245                 return -EIO;
 246         return 0;
 247 }
 248
 249
 250 static int __init
 251 find_dual_image_off (struct mtd_info *mtd, size_t size)
 252 {
 253         struct trx_header trx;
 254         int off, blocksize;
 255         size_t len;
 256
 257         blocksize = mtd->erasesize;
 258         if (blocksize < 0x10000)
 259                 blocksize = 0x10000;
 260
 261         for (off = (128*1024); off < size; off += blocksize) {
 262                 memset(&trx, 0xe5, sizeof(trx));
 263                 /*
 264                 * Read into buffer
 265                 */
 266                 if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
 267                     len != sizeof(trx))
 268                         continue;
 269                 /* found last TRX header */
 270                 if (le32_to_cpu(trx.magic) == TRX_MAGIC){
 271                         if (le32_to_cpu(trx.flag_version >> 16)==2){
 272                                 printk("dual image TRX header found\n");
 273                                 return size/2;
 274                         } else {
 275                                 return 0;
 276                         }
 277                 }
 278         }
 279         return 0;
 280 }
 281
 282
 283 static int __init
 284 find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
 285 {
 286         struct trx_header trx, *trx2;
 287         unsigned char buf[512], *block;
 288         int off, blocksize, trxoff = 0;
 289         u32 i, crc = ~0;
 290         size_t len;
 291         bool edimax = false;
 292
 293         blocksize = mtd->erasesize;
 294         if (blocksize < 0x10000)
 295                 blocksize = 0x10000;
 296
 297         for (off = (128*1024); off < size; off += blocksize) {
 298                 memset(&trx, 0xe5, sizeof(trx));
 299
 300                 /*
 301                  * Read into buffer
 302                  */
 303                 if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
 304                     len != sizeof(trx))
 305                         continue;
 306
 307                 /* found an edimax header */
 308                 if (le32_to_cpu(trx.magic) == EDIMAX_PS_HEADER_MAGIC) {
 309                         /* read the correct trx header */
 310                         if (mtd->read(mtd, off + EDIMAX_PS_HEADER_LEN,
 311                             sizeof(trx), &len, (char *) &trx) ||
 312                             len != sizeof(trx)) {
 313                                 continue;
 314                         } else {
 315                                 printk(KERN_NOTICE"Found an edimax ps header\n");
 316                                 edimax = true;
 317                         }
 318                 }
 319
 320                 /* found a TRX header */
 321                 if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
 322                         part->offset = le32_to_cpu(trx.offsets[2]) ? :
 323                                 le32_to_cpu(trx.offsets[1]);
 324                         part->size = le32_to_cpu(trx.len);
 325
 326                         part->size -= part->offset;
 327                         part->offset += off;
 328                         if (edimax) {
 329                                 off += EDIMAX_PS_HEADER_LEN;
 330                                 trxoff = EDIMAX_PS_HEADER_LEN;
 331                         }
 332
 333                         goto found;
 334                 }
 335         }
 336
 337         printk(KERN_NOTICE
 338                "%s: Couldn't find root filesystem\n",
 339                mtd->name);
 340         return -1;
 341
 342  found:
 343         printk(KERN_NOTICE"TRX offset : %lx\n", trxoff);
 344         if (part->size == 0)
 345                 return 0;
 346
 347         if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
 348                 return 0;
 349
 350         /* Move the fs outside of the trx */
 351         part->size = 0;
 352
 353         if (trx.len != part->offset + part->size - off) {
 354                 /* Update the trx offsets and length */
 355                 trx.len = part->offset + part->size - off;
 356
 357                 /* Update the trx crc32 */
 358                 for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) {
 359                         if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf))
 360                                 return 0;
 361                         crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i));
 362                 }
 363                 trx.crc32 = crc;
 364
 365                 /* read first eraseblock from the trx */
 366                 block = kmalloc(mtd->erasesize, GFP_KERNEL);
 367                 trx2 = (struct trx_header *) block;
 368                 if (mtd->read(mtd, off - trxoff, mtd->erasesize, &len, block) || len != mtd->erasesize) {
 369                         printk("Error accessing the first trx eraseblock\n");
 370                         return 0;
 371                 }
 372
 373                 printk("Updating TRX offsets and length:\n");
 374                 printk("old trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx2->offsets[0], trx2->offsets[1], trx2->offsets[2], trx2->len, trx2->crc32);
 375                 printk("new trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n",   trx.offsets[0],   trx.offsets[1],   trx.offsets[2],   trx.len, trx.crc32);
 376
 377                 /* Write updated trx header to the flash */
 378                 memcpy(block + trxoff, &trx, sizeof(trx));
 379                 if (mtd->unlock)
 380                         mtd->unlock(mtd, off - trxoff, mtd->erasesize);
 381                 erase_write(mtd, off - trxoff, mtd->erasesize, block);
 382                 if (mtd->sync)
 383                         mtd->sync(mtd);
 384                 kfree(block);
 385                 printk("Done\n");
 386         }
 387
 388         return part->size;
 389 }
 390
 391 static int get_router(void)
 392 {
 393         char buf[20];
 394         u32 boardnum = 0;
 395         u16 boardtype = 0;
 396         u16 boardrev = 0;
 397         u32 boardflags = 0;
 398         u16 sdram_init = 0;
 399         u16 cardbus = 0;
 400
 401         if (nvram_getenv("boardnum", buf, sizeof(buf)) >= 0 ||
 402             cfe_getenv("boardnum", buf, sizeof(buf)) >= 0)
 403                 boardnum = simple_strtoul(buf, NULL, 0);
 404         if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0 ||
 405             cfe_getenv("boardtype", buf, sizeof(buf)) >= 0)
 406                 boardtype = simple_strtoul(buf, NULL, 0);
 407         if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0 ||
 408             cfe_getenv("boardrev", buf, sizeof(buf)) >= 0)
 409                 boardrev = simple_strtoul(buf, NULL, 0);
 410         if (nvram_getenv("boardflags", buf, sizeof(buf)) >= 0 ||
 411             cfe_getenv("boardflags", buf, sizeof(buf)) >= 0)
 412                 boardflags = simple_strtoul(buf, NULL, 0);
 413         if (nvram_getenv("sdram_init", buf, sizeof(buf)) >= 0 ||
 414             cfe_getenv("sdram_init", buf, sizeof(buf)) >= 0)
 415                 sdram_init = simple_strtoul(buf, NULL, 0);
 416         if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0 ||
 417             cfe_getenv("cardbus", buf, sizeof(buf)) >= 0)
 418                 cardbus = simple_strtoul(buf, NULL, 0);
 419
 420         if ((boardnum == 8 || boardnum == 01)
 421           && boardtype == 0x0472 && cardbus == 1) {
 422                 /* Netgear WNR834B, Netgear WNR834Bv2 */
 423                 return ROUTER_NETGEAR_WNR834B;
 424         }
 425
 426         if (boardnum == 01 && boardtype == 0x0472 && boardrev == 0x23) {
 427                 /* Netgear WNDR-3300 */
 428                 return ROUTER_NETGEAR_WNDR3300;
 429         }
 430
 431         if ((boardnum == 83258 || boardnum == 01)
 432           && boardtype == 0x048e
 433           && (boardrev == 0x11 || boardrev == 0x10)
 434           && boardflags == 0x750
 435           && sdram_init == 0x000A) {
 436                 /* Netgear WGR614v8/L/WW 16MB ram, cfe v1.3 or v1.5 */
 437                 return ROUTER_NETGEAR_WGR614L;
 438         }
 439
 440         if ((boardnum == 1 || boardnum == 3500)
 441           && boardtype == 0x04CF
 442           && (boardrev == 0x1213 || boardrev == 02)) {
 443                 /* Netgear WNR3500v2/U/L */
 444                 return ROUTER_NETGEAR_WNR3500L;
 445         }
 446
 447         return 0;
 448 }
 449
 450 struct mtd_partition * __init
 451 init_mtd_partitions(struct mtd_info *mtd, size_t size)
 452 {
 453         int cfe_size;
 454         int dual_image_offset = 0;
 455         /* e.g Netgear 0x003e0000-0x003f0000 : "board_data", we exclude this
 456          * part from our mapping to prevent overwriting len/checksum on e.g.
 457          * Netgear WGR614v8/L/WW
 458          */
 459         int board_data_size = 0;
 460
 461         switch (get_router()) {
 462         case ROUTER_NETGEAR_WGR614L:
 463         case ROUTER_NETGEAR_WNR834B:
 464         case ROUTER_NETGEAR_WNDR3300:
 465         case ROUTER_NETGEAR_WNR3500L:
 466                 /* Netgear: checksum is @ 0x003AFFF8 for 4M flash or checksum
 467                  * is @ 0x007AFFF8 for 8M flash
 468                  */
 469                 board_data_size = 4 * mtd->erasesize;
 470                 break;
 471         }
 472
 473         if ((cfe_size = find_cfe_size(mtd,size)) < 0)
 474                 return NULL;
 475
 476         /* boot loader */
 477         bcm47xx_parts[0].offset = 0;
 478         bcm47xx_parts[0].size   = cfe_size;
 479
 480         /* nvram */
 481         if (cfe_size != 384 * 1024) {
 482                 bcm47xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
 483                 bcm47xx_parts[3].size   = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
 484         } else {
 485                 /* nvram (old 128kb config partition on netgear wgt634u) */
 486                 bcm47xx_parts[3].offset = bcm47xx_parts[0].size;
 487                 bcm47xx_parts[3].size   = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
 488         }
 489
 490         /* dual image offset*/
 491         printk("Looking for dual image\n");
 492         dual_image_offset=find_dual_image_off(mtd,size);
 493         /* linux (kernel and rootfs) */
 494         if (cfe_size != 384 * 1024) {
 495                 bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
 496                 bcm47xx_parts[1].size   = bcm47xx_parts[3].offset - dual_image_offset -
 497                         bcm47xx_parts[1].offset - board_data_size;
 498         } else {
 499                 /* do not count the elf loader, which is on one block */
 500                 bcm47xx_parts[1].offset = bcm47xx_parts[0].size +
 501                         bcm47xx_parts[3].size + mtd->erasesize;
 502                 bcm47xx_parts[1].size   = size -
 503                         bcm47xx_parts[0].size -
 504                         (2*bcm47xx_parts[3].size) -
 505                         mtd->erasesize - board_data_size;
 506         }
 507
 508         /* find and size rootfs */
 509         find_root(mtd,size,&bcm47xx_parts[2]);
 510         bcm47xx_parts[2].size = size - dual_image_offset -
 511                                 bcm47xx_parts[2].offset -
 512                                 bcm47xx_parts[3].size - board_data_size;
 513
 514         return bcm47xx_parts;
 515 }
 516 #endif
 517
 518 int __init init_bcm47xx_map(void)
 519 {
 520 #ifdef CONFIG_SSB
 521         struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
 522 #endif
 523         size_t size;
 524         int ret = 0;
 525 #ifdef CONFIG_MTD_PARTITIONS
 526         struct mtd_partition *parts;
 527         int i;
 528 #endif
 529
 530 #ifdef CONFIG_SSB
 531         u32 window = mcore->flash_window;
 532         u32 window_size = mcore->flash_window_size;
 533
 534         printk("flash init: 0x%08x 0x%08x\n", window, window_size);
 535         bcm47xx_map.phys = window;
 536         bcm47xx_map.size = window_size;
 537         bcm47xx_map.bankwidth = mcore->flash_buswidth;
 538         bcm47xx_map.virt = ioremap_nocache(window, window_size);
 539 #else
 540         printk("flash init: 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE);
 541         bcm47xx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
 542 #endif
 543
 544         if (!bcm47xx_map.virt) {
 545                 printk("Failed to ioremap\n");
 546                 return -EIO;
 547         }
 548
 549         simple_map_init(&bcm47xx_map);
 550
 551         if (!(bcm47xx_mtd = do_map_probe("cfi_probe", &bcm47xx_map))) {
 552                 printk("Failed to do_map_probe\n");
 553                 iounmap((void *)bcm47xx_map.virt);
 554                 return -ENXIO;
 555         }
 556
 557         /* override copy_from routine */
 558         bcm47xx_map.copy_from = bcm47xx_map_copy_from;
 559
 560         bcm47xx_mtd->owner = THIS_MODULE;
 561
 562         size = bcm47xx_mtd->size;
 563
 564         printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
 565
 566 #ifdef CONFIG_MTD_PARTITIONS
 567         parts = init_mtd_partitions(bcm47xx_mtd, size);
 568         for (i = 0; parts[i].name; i++);
 569         ret = add_mtd_partitions(bcm47xx_mtd, parts, i);
 570         if (ret) {
 571                 printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
 572                 goto fail;
 573         }
 574 #endif
 575         return 0;
 576
 577  fail:
 578         if (bcm47xx_mtd)
 579                 map_destroy(bcm47xx_mtd);
 580         if (bcm47xx_map.virt)
 581                 iounmap((void *)bcm47xx_map.virt);
 582         bcm47xx_map.virt = 0;
 583         return ret;
 584 }
 585
 586 void __exit cleanup_bcm47xx_map(void)
 587 {
 588 #ifdef CONFIG_MTD_PARTITIONS
 589         del_mtd_partitions(bcm47xx_mtd);
 590 #endif
 591         map_destroy(bcm47xx_mtd);
 592         iounmap((void *)bcm47xx_map.virt);
 593 }
 594
 595 module_init(init_bcm47xx_map);
 596 module_exit(cleanup_bcm47xx_map);