target/linux/brcm47xx/patches-3.3/050-mtd-add-bcm47xx-part-parser.patch

   1 --- a/drivers/mtd/Kconfig
   2 +++ b/drivers/mtd/Kconfig
   3 @@ -172,6 +172,13 @@ config MTD_MYLOADER_PARTS
   4           You will still need the parsing functions to be called by the driver
   5           for your particular device. It won't happen automatically.
   6
   7 +config MTD_BCM47XX_PARTS
   8 +       tristate "BCM47XX partitioning support"
   9 +       default y
  10 +       depends on BCM47XX
  11 +       ---help---
  12 +         bcm47XX partitioning support
  13 +
  14  comment "User Modules And Translation Layers"
  15
  16  config MTD_CHAR
  17 --- a/drivers/mtd/Makefile
  18 +++ b/drivers/mtd/Makefile
  19 @@ -13,6 +13,7 @@ obj-$(CONFIG_MTD_AFS_PARTS)   += afs.o
  20  obj-$(CONFIG_MTD_AR7_PARTS)    += ar7part.o
  21  obj-$(CONFIG_MTD_BCM63XX_PARTS)        += bcm63xxpart.o
  22  obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
  23 +obj-$(CONFIG_MTD_BCM47XX_PARTS)        += bcm47xxpart.o
  24
  25  # 'Users' - code which presents functionality to userspace.
  26  obj-$(CONFIG_MTD_CHAR)         += mtdchar.o
  27 --- /dev/null
  28 +++ b/drivers/mtd/bcm47xxpart.c
  29 @@ -0,0 +1,548 @@
  30 +/*
  31 + *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
  32 + *  Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
  33 + *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
  34 + *
  35 + *  original functions for finding root filesystem from Mike Baker
  36 + *
  37 + *  This program is free software; you can redistribute  it and/or modify it
  38 + *  under  the terms of  the GNU General  Public License as published by the
  39 + *  Free Software Foundation;  either version 2 of the  License, or (at your
  40 + *  option) any later version.
  41 + *
  42 + *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  43 + *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  44 + *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  45 + *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  46 + *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  47 + *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  48 + *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  49 + *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  50 + *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  51 + *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  52 + *
  53 + *  You should have received a copy of the  GNU General Public License along
  54 + *  with this program; if not, write  to the Free Software Foundation, Inc.,
  55 + *  675 Mass Ave, Cambridge, MA 02139, USA.
  56 + *
  57 + *  Copyright 2001-2003, Broadcom Corporation
  58 + *  All Rights Reserved.
  59 + *
  60 + *  THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
  61 + *  KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  62 + *  SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  63 + *  FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  64 + *
  65 + *  Flash mapping for BCM947XX boards
  66 + */
  67 +
  68 +#define pr_fmt(fmt) "bcm47xx_part: " fmt
  69 +#include <linux/init.h>
  70 +#include <linux/module.h>
  71 +#include <linux/types.h>
  72 +#include <linux/kernel.h>
  73 +#include <linux/sched.h>
  74 +#include <linux/wait.h>
  75 +#include <linux/mtd/mtd.h>
  76 +#include <linux/mtd/partitions.h>
  77 +#include <linux/crc32.h>
  78 +#include <linux/io.h>
  79 +#include <asm/mach-bcm47xx/nvram.h>
  80 +#include <asm/mach-bcm47xx/bcm47xx.h>
  81 +#include <asm/fw/cfe/cfe_api.h>
  82 +
  83 +
  84 +#define TRX_MAGIC      0x30524448      /* "HDR0" */
  85 +#define TRX_VERSION    1
  86 +#define TRX_MAX_LEN    0x3A0000
  87 +#define TRX_NO_HEADER  1               /* Do not write TRX header */
  88 +#define TRX_GZ_FILES   0x2     /* Contains up to TRX_MAX_OFFSET individual gzip files */
  89 +#define TRX_MAX_OFFSET 3
  90 +
  91 +struct trx_header {
  92 +       u32 magic;              /* "HDR0" */
  93 +       u32 len;                /* Length of file including header */
  94 +       u32 crc32;              /* 32-bit CRC from flag_version to end of file */
  95 +       u32 flag_version;       /* 0:15 flags, 16:31 version */
  96 +       u32 offsets[TRX_MAX_OFFSET];    /* Offsets of partitions from start of header */
  97 +};
  98 +
  99 +/* for WGT634U search the ELF-header of
 100 + * the kernel decompressor instead of TRX
 101 + */
 102 +#define WGT634U_ELF_MAGIC      0x464c457f /*  ".ELF"  */
 103 +
 104 +/* for Edimax Print servers which use an additional header
 105 + * then the firmware on flash looks like :
 106 + * EDIMAX HEADER | TRX HEADER
 107 + * As this header is 12 bytes long we have to handle it
 108 + * and skip it to find the TRX header
 109 + */
 110 +#define EDIMAX_PS_HEADER_MAGIC 0x36315350 /*  "PS16"  */
 111 +#define EDIMAX_PS_HEADER_LEN   0xc /* 12 bytes long for edimax header */
 112 +
 113 +#define NVRAM_SPACE 0x8000
 114 +
 115 +#define ROUTER_NETGEAR_WGR614L         1
 116 +#define ROUTER_NETGEAR_WNR834B         2
 117 +#define ROUTER_NETGEAR_WNDR3300                3
 118 +#define ROUTER_NETGEAR_WNR3500L                4
 119 +#define ROUTER_SIMPLETECH_SIMPLESHARE  5
 120 +#define ROUTER_NETGEAR_WNDR3400                6
 121 +
 122 +static int
 123 +find_cfe_size(struct mtd_info *mtd)
 124 +{
 125 +       struct trx_header *trx;
 126 +       unsigned char buf[512];
 127 +       int off;
 128 +       size_t len;
 129 +       int blocksize;
 130 +
 131 +       trx = (struct trx_header *) buf;
 132 +
 133 +       blocksize = mtd->erasesize;
 134 +       if (blocksize < 0x10000)
 135 +               blocksize = 0x10000;
 136 +
 137 +       for (off = (128*1024); off < mtd->size; off += blocksize) {
 138 +               memset(buf, 0xe5, sizeof(buf));
 139 +
 140 +               /*
 141 +                * Read into buffer
 142 +                */
 143 +               if (mtd->read(mtd, off, sizeof(buf), &len, buf) ||
 144 +                   len != sizeof(buf))
 145 +                       continue;
 146 +
 147 +               if (le32_to_cpu(trx->magic) == EDIMAX_PS_HEADER_MAGIC) {
 148 +                       if (mtd->read(mtd, off + EDIMAX_PS_HEADER_LEN,
 149 +                           sizeof(buf), &len, buf) || len != sizeof(buf)) {
 150 +                               continue;
 151 +                       } else {
 152 +                               pr_notice("Found edimax header\n");
 153 +                       }
 154 +               }
 155 +
 156 +               /* found a TRX header */
 157 +               if (le32_to_cpu(trx->magic) == TRX_MAGIC ||
 158 +                   le32_to_cpu(trx->magic) == WGT634U_ELF_MAGIC)
 159 +                       goto found;
 160 +       }
 161 +
 162 +       pr_notice("%s: Couldn't find bootloader size\n", mtd->name);
 163 +       return -1;
 164 +
 165 + found:
 166 +       pr_notice("bootloader size: %d\n", off);
 167 +       return off;
 168 +
 169 +}
 170 +
 171 +/*
 172 + * Copied from mtdblock.c
 173 + *
 174 + * Cache stuff...
 175 + *
 176 + * Since typical flash erasable sectors are much larger than what Linux's
 177 + * buffer cache can handle, we must implement read-modify-write on flash
 178 + * sectors for each block write requests.  To avoid over-erasing flash sectors
 179 + * and to speed things up, we locally cache a whole flash sector while it is
 180 + * being written to until a different sector is required.
 181 + */
 182 +
 183 +static void erase_callback(struct erase_info *done)
 184 +{
 185 +       wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
 186 +       wake_up(wait_q);
 187 +}
 188 +
 189 +static int erase_write(struct mtd_info *mtd, unsigned long pos,
 190 +                       int len, const char *buf)
 191 +{
 192 +       struct erase_info erase;
 193 +       DECLARE_WAITQUEUE(wait, current);
 194 +       wait_queue_head_t wait_q;
 195 +       size_t retlen;
 196 +       int ret;
 197 +
 198 +       /*
 199 +        * First, let's erase the flash block.
 200 +        */
 201 +
 202 +       init_waitqueue_head(&wait_q);
 203 +       erase.mtd = mtd;
 204 +       erase.callback = erase_callback;
 205 +       erase.addr = pos;
 206 +       erase.len = len;
 207 +       erase.priv = (u_long)&wait_q;
 208 +
 209 +       set_current_state(TASK_INTERRUPTIBLE);
 210 +       add_wait_queue(&wait_q, &wait);
 211 +
 212 +       ret = mtd->erase(mtd, &erase);
 213 +       if (ret) {
 214 +               set_current_state(TASK_RUNNING);
 215 +               remove_wait_queue(&wait_q, &wait);
 216 +               pr_warn("erase of region [0x%lx, 0x%x] on \"%s\" failed\n",
 217 +                       pos, len, mtd->name);
 218 +               return ret;
 219 +       }
 220 +
 221 +       schedule();  /* Wait for erase to finish. */
 222 +       remove_wait_queue(&wait_q, &wait);
 223 +
 224 +       /*
 225 +        * Next, write data to flash.
 226 +        */
 227 +
 228 +       ret = mtd->write(mtd, pos, len, &retlen, buf);
 229 +       if (ret)
 230 +               return ret;
 231 +       if (retlen != len)
 232 +               return -EIO;
 233 +       return 0;
 234 +}
 235 +
 236 +
 237 +static int
 238 +find_dual_image_off(struct mtd_info *mtd)
 239 +{
 240 +       struct trx_header trx;
 241 +       int off, blocksize;
 242 +       size_t len;
 243 +
 244 +       blocksize = mtd->erasesize;
 245 +       if (blocksize < 0x10000)
 246 +               blocksize = 0x10000;
 247 +
 248 +       for (off = (128*1024); off < mtd->size; off += blocksize) {
 249 +               memset(&trx, 0xe5, sizeof(trx));
 250 +               /*
 251 +               * Read into buffer
 252 +               */
 253 +               if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
 254 +                   len != sizeof(trx))
 255 +                       continue;
 256 +               /* found last TRX header */
 257 +               if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
 258 +                       if (le32_to_cpu(trx.flag_version >> 16) == 2) {
 259 +                               pr_notice("dual image TRX header found\n");
 260 +                               return mtd->size / 2;
 261 +                       } else {
 262 +                               return 0;
 263 +                       }
 264 +               }
 265 +       }
 266 +       return 0;
 267 +}
 268 +
 269 +
 270 +static int
 271 +find_root(struct mtd_info *mtd, struct mtd_partition *part)
 272 +{
 273 +       struct trx_header trx, *trx2;
 274 +       unsigned char buf[512], *block;
 275 +       int off, blocksize, trxoff = 0;
 276 +       u32 i, crc = ~0;
 277 +       size_t len;
 278 +       bool edimax = false;
 279 +
 280 +       blocksize = mtd->erasesize;
 281 +       if (blocksize < 0x10000)
 282 +               blocksize = 0x10000;
 283 +
 284 +       for (off = (128*1024); off < mtd->size; off += blocksize) {
 285 +               memset(&trx, 0xe5, sizeof(trx));
 286 +
 287 +               /*
 288 +                * Read into buffer
 289 +                */
 290 +               if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
 291 +                   len != sizeof(trx))
 292 +                       continue;
 293 +
 294 +               /* found an edimax header */
 295 +               if (le32_to_cpu(trx.magic) == EDIMAX_PS_HEADER_MAGIC) {
 296 +                       /* read the correct trx header */
 297 +                       if (mtd->read(mtd, off + EDIMAX_PS_HEADER_LEN,
 298 +                           sizeof(trx), &len, (char *) &trx) ||
 299 +                           len != sizeof(trx)) {
 300 +                               continue;
 301 +                       } else {
 302 +                               pr_notice("Found an edimax ps header\n");
 303 +                               edimax = true;
 304 +                       }
 305 +               }
 306 +
 307 +               /* found a TRX header */
 308 +               if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
 309 +                       part->offset = le32_to_cpu(trx.offsets[2]) ? :
 310 +                               le32_to_cpu(trx.offsets[1]);
 311 +                       part->size = le32_to_cpu(trx.len);
 312 +
 313 +                       part->size -= part->offset;
 314 +                       part->offset += off;
 315 +                       if (edimax) {
 316 +                               off += EDIMAX_PS_HEADER_LEN;
 317 +                               trxoff = EDIMAX_PS_HEADER_LEN;
 318 +                       }
 319 +
 320 +                       goto found;
 321 +               }
 322 +       }
 323 +
 324 +       pr_warn("%s: Couldn't find root filesystem\n",
 325 +              mtd->name);
 326 +       return -1;
 327 +
 328 + found:
 329 +       pr_notice("TRX offset : %x\n", trxoff);
 330 +       if (part->size == 0)
 331 +               return 0;
 332 +
 333 +       if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
 334 +               return 0;
 335 +
 336 +       /* Move the fs outside of the trx */
 337 +       part->size = 0;
 338 +
 339 +       if (trx.len != part->offset + part->size - off) {
 340 +               /* Update the trx offsets and length */
 341 +               trx.len = part->offset + part->size - off;
 342 +
 343 +               /* Update the trx crc32 */
 344 +               for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) {
 345 +                       if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf))
 346 +                               return 0;
 347 +                       crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i));
 348 +               }
 349 +               trx.crc32 = crc;
 350 +
 351 +               /* read first eraseblock from the trx */
 352 +               block = kmalloc(mtd->erasesize, GFP_KERNEL);
 353 +               trx2 = (struct trx_header *) block;
 354 +               if (mtd->read(mtd, off - trxoff, mtd->erasesize, &len, block) || len != mtd->erasesize) {
 355 +                       pr_err("Error accessing the first trx eraseblock\n");
 356 +                       return 0;
 357 +               }
 358 +
 359 +               pr_notice("Updating TRX offsets and length:\n");
 360 +               pr_notice("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);
 361 +               pr_notice("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);
 362 +
 363 +               /* Write updated trx header to the flash */
 364 +               memcpy(block + trxoff, &trx, sizeof(trx));
 365 +               if (mtd->unlock)
 366 +                       mtd->unlock(mtd, off - trxoff, mtd->erasesize);
 367 +               erase_write(mtd, off - trxoff, mtd->erasesize, block);
 368 +               if (mtd->sync)
 369 +                       mtd->sync(mtd);
 370 +               kfree(block);
 371 +               pr_notice("Done\n");
 372 +       }
 373 +
 374 +       return part->size;
 375 +}
 376 +
 377 +static int get_router(void)
 378 +{
 379 +       char buf[20];
 380 +       u32 boardnum = 0;
 381 +       u16 boardtype = 0;
 382 +       u16 boardrev = 0;
 383 +       u32 boardflags = 0;
 384 +       u16 sdram_init = 0;
 385 +       u16 cardbus = 0;
 386 +       u16 strev = 0;
 387 +
 388 +       if (nvram_getenv("boardnum", buf, sizeof(buf)) >= 0)
 389 +               boardnum = simple_strtoul(buf, NULL, 0);
 390 +       if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0)
 391 +               boardtype = simple_strtoul(buf, NULL, 0);
 392 +       if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0)
 393 +               boardrev = simple_strtoul(buf, NULL, 0);
 394 +       if (nvram_getenv("boardflags", buf, sizeof(buf)) >= 0)
 395 +               boardflags = simple_strtoul(buf, NULL, 0);
 396 +       if (nvram_getenv("sdram_init", buf, sizeof(buf)) >= 0)
 397 +               sdram_init = simple_strtoul(buf, NULL, 0);
 398 +       if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 399 +               cardbus = simple_strtoul(buf, NULL, 0);
 400 +       if (nvram_getenv("st_rev", buf, sizeof(buf)) >= 0)
 401 +               strev = simple_strtoul(buf, NULL, 0);
 402 +
 403 +       if ((boardnum == 8 || boardnum == 01)
 404 +         && boardtype == 0x0472 && cardbus == 1) {
 405 +               /* Netgear WNR834B, Netgear WNR834Bv2 */
 406 +               return ROUTER_NETGEAR_WNR834B;
 407 +       }
 408 +
 409 +       if (boardnum == 01 && boardtype == 0x0472 && boardrev == 0x23) {
 410 +               /* Netgear WNDR-3300 */
 411 +               return ROUTER_NETGEAR_WNDR3300;
 412 +       }
 413 +
 414 +       if ((boardnum == 83258 || boardnum == 01)
 415 +         && boardtype == 0x048e
 416 +         && (boardrev == 0x11 || boardrev == 0x10)
 417 +         && boardflags == 0x750
 418 +         && sdram_init == 0x000A) {
 419 +               /* Netgear WGR614v8/L/WW 16MB ram, cfe v1.3 or v1.5 */
 420 +               return ROUTER_NETGEAR_WGR614L;
 421 +       }
 422 +
 423 +       if ((boardnum == 1 || boardnum == 3500)
 424 +         && boardtype == 0x04CF
 425 +         && (boardrev == 0x1213 || boardrev == 02)) {
 426 +               /* Netgear WNR3500v2/U/L */
 427 +               return ROUTER_NETGEAR_WNR3500L;
 428 +       }
 429 +
 430 +       if (boardnum == 1 && boardtype == 0xb4cf && boardrev == 0x1100) {
 431 +               /* Netgear WNDR3400 */
 432 +               return ROUTER_NETGEAR_WNDR3400;
 433 +       }
 434 +
 435 +       if (boardtype == 0x042f
 436 +         && boardrev == 0x10
 437 +         && boardflags == 0
 438 +         && strev == 0x11) {
 439 +               /* Simpletech Simpleshare */
 440 +               return ROUTER_SIMPLETECH_SIMPLESHARE;
 441 +       }
 442 +
 443 +       return 0;
 444 +}
 445 +
 446 +static int parse_bcm47xx_partitions(struct mtd_info *mtd,
 447 +                                   struct mtd_partition **pparts,
 448 +                                   struct mtd_part_parser_data *data)
 449 +{
 450 +       int cfe_size;
 451 +       int dual_image_offset = 0;
 452 +       /* e.g Netgear 0x003e0000-0x003f0000 : "board_data", we exclude this
 453 +        * part from our mapping to prevent overwriting len/checksum on e.g.
 454 +        * Netgear WGR614v8/L/WW
 455 +        */
 456 +       int custom_data_size = 0;
 457 +       struct mtd_partition *bcm47xx_parts;
 458 +
 459 +       cfe_size = find_cfe_size(mtd);
 460 +       if (cfe_size < 0)
 461 +               return 0;
 462 +
 463 +       bcm47xx_parts = kzalloc(sizeof(struct mtd_partition) * 6, GFP_KERNEL);
 464 +
 465 +       bcm47xx_parts[0].name = "cfe";
 466 +       bcm47xx_parts[1].name = "linux";
 467 +       bcm47xx_parts[2].name = "rootfs";
 468 +       bcm47xx_parts[3].name = "nvram";
 469 +
 470 +       /* boot loader */
 471 +       bcm47xx_parts[0].mask_flags = MTD_WRITEABLE;
 472 +       bcm47xx_parts[0].offset = 0;
 473 +       bcm47xx_parts[0].size   = cfe_size;
 474 +
 475 +       /* nvram */
 476 +       if (cfe_size != 384 * 1024) {
 477 +
 478 +               switch (get_router()) {
 479 +               case ROUTER_NETGEAR_WGR614L:
 480 +               case ROUTER_NETGEAR_WNR834B:
 481 +               case ROUTER_NETGEAR_WNDR3300:
 482 +               case ROUTER_NETGEAR_WNR3500L:
 483 +               case ROUTER_NETGEAR_WNDR3400:
 484 +                       /* Netgear: checksum is @ 0x003AFFF8 for 4M flash or checksum
 485 +                        * is @ 0x007AFFF8 for 8M flash
 486 +                        */
 487 +                       custom_data_size = mtd->erasesize;
 488 +
 489 +                       bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize);
 490 +                       bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 491 +
 492 +                       /* Place CFE board_data into a partition */
 493 +                       bcm47xx_parts[4].name = "board_data";
 494 +                       bcm47xx_parts[4].offset = bcm47xx_parts[3].offset - custom_data_size;
 495 +                       bcm47xx_parts[4].size   = custom_data_size;
 496 +                       break;
 497 +
 498 +               case ROUTER_SIMPLETECH_SIMPLESHARE:
 499 +                       /* Fixup Simpletech Simple share nvram  */
 500 +
 501 +                       pr_notice("Setting up simpletech nvram\n");
 502 +                       custom_data_size = mtd->erasesize;
 503 +
 504 +                       bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize) * 2;
 505 +                       bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 506 +
 507 +                       /* Place backup nvram into a partition */
 508 +                       bcm47xx_parts[4].name = "nvram_copy";
 509 +                       bcm47xx_parts[4].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize);
 510 +                       bcm47xx_parts[4].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 511 +                       break;
 512 +
 513 +               default:
 514 +                       bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize);
 515 +                       bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 516 +               }
 517 +
 518 +       } else {
 519 +               /* nvram (old 128kb config partition on netgear wgt634u) */
 520 +               bcm47xx_parts[3].offset = bcm47xx_parts[0].size;
 521 +               bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 522 +       }
 523 +
 524 +       /* dual image offset*/
 525 +       pr_notice("Looking for dual image\n");
 526 +       dual_image_offset = find_dual_image_off(mtd);
 527 +       /* linux (kernel and rootfs) */
 528 +       if (cfe_size != 384 * 1024) {
 529 +               if (get_router() == ROUTER_SIMPLETECH_SIMPLESHARE) {
 530 +                       bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
 531 +                       bcm47xx_parts[1].size   = bcm47xx_parts[4].offset - dual_image_offset -
 532 +                               bcm47xx_parts[1].offset - custom_data_size;
 533 +               } else {
 534 +                       bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
 535 +                       bcm47xx_parts[1].size   = bcm47xx_parts[3].offset - dual_image_offset -
 536 +                               bcm47xx_parts[1].offset - custom_data_size;
 537 +               }
 538 +       } else {
 539 +               /* do not count the elf loader, which is on one block */
 540 +               bcm47xx_parts[1].offset = bcm47xx_parts[0].size +
 541 +                       bcm47xx_parts[3].size + mtd->erasesize;
 542 +               bcm47xx_parts[1].size   = mtd->size -
 543 +                       bcm47xx_parts[0].size -
 544 +                       (2*bcm47xx_parts[3].size) -
 545 +                       mtd->erasesize - custom_data_size;
 546 +       }
 547 +
 548 +       /* find and size rootfs */
 549 +       find_root(mtd, &bcm47xx_parts[2]);
 550 +       bcm47xx_parts[2].size = mtd->size - dual_image_offset -
 551 +                               bcm47xx_parts[2].offset -
 552 +                               bcm47xx_parts[3].size - custom_data_size;
 553 +       *pparts = bcm47xx_parts;
 554 +       return bcm47xx_parts[4].name == NULL ? 4 : 5;
 555 +}
 556 +
 557 +static struct mtd_part_parser bcm47xx_parser = {
 558 +       .owner = THIS_MODULE,
 559 +       .parse_fn = parse_bcm47xx_partitions,
 560 +       .name = "bcm47xx",
 561 +};
 562 +
 563 +static int __init bcm47xx_parser_init(void)
 564 +{
 565 +       return register_mtd_parser(&bcm47xx_parser);
 566 +}
 567 +
 568 +static void __exit bcm47xx_parser_exit(void)
 569 +{
 570 +       deregister_mtd_parser(&bcm47xx_parser);
 571 +}
 572 +
 573 +module_init(bcm47xx_parser_init);
 574 +module_exit(bcm47xx_parser_exit);
 575 +
 576 +MODULE_LICENSE("GPL");
 577 +MODULE_DESCRIPTION("Parsing code for flash partitions on bcm47xx SoCs");