target/linux/brcm47xx/patches-3.6/050-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 +1,541 @@
  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 Edimax Print servers which use an additional header
 100 + * then the firmware on flash looks like :
 101 + * EDIMAX HEADER | TRX HEADER
 102 + * As this header is 12 bytes long we have to handle it
 103 + * and skip it to find the TRX header
 104 + */
 105 +#define EDIMAX_PS_HEADER_MAGIC 0x36315350 /*  "PS16"  */
 106 +#define EDIMAX_PS_HEADER_LEN   0xc /* 12 bytes long for edimax header */
 107 +
 108 +#define NVRAM_SPACE 0x8000
 109 +
 110 +#define ROUTER_NETGEAR_WGR614L         1
 111 +#define ROUTER_NETGEAR_WNR834B         2
 112 +#define ROUTER_NETGEAR_WNDR3300                3
 113 +#define ROUTER_NETGEAR_WNR3500L                4
 114 +#define ROUTER_SIMPLETECH_SIMPLESHARE  5
 115 +#define ROUTER_NETGEAR_WNDR3400                6
 116 +
 117 +static int
 118 +find_cfe_size(struct mtd_info *mtd)
 119 +{
 120 +       struct trx_header *trx;
 121 +       unsigned char buf[512];
 122 +       int off;
 123 +       size_t len;
 124 +       int blocksize;
 125 +
 126 +       trx = (struct trx_header *) buf;
 127 +
 128 +       blocksize = mtd->erasesize;
 129 +       if (blocksize < 0x10000)
 130 +               blocksize = 0x10000;
 131 +
 132 +       for (off = (128*1024); off < mtd->size; off += blocksize) {
 133 +               memset(buf, 0xe5, sizeof(buf));
 134 +
 135 +               /*
 136 +                * Read into buffer
 137 +                */
 138 +               if (mtd_read(mtd, off, sizeof(buf), &len, buf) ||
 139 +                   len != sizeof(buf))
 140 +                       continue;
 141 +
 142 +               if (le32_to_cpu(trx->magic) == EDIMAX_PS_HEADER_MAGIC) {
 143 +                       if (mtd_read(mtd, off + EDIMAX_PS_HEADER_LEN,
 144 +                           sizeof(buf), &len, buf) || len != sizeof(buf)) {
 145 +                               continue;
 146 +                       } else {
 147 +                               pr_notice("Found edimax header\n");
 148 +                       }
 149 +               }
 150 +
 151 +               /* found a TRX header */
 152 +               if (le32_to_cpu(trx->magic) == TRX_MAGIC)
 153 +                       goto found;
 154 +       }
 155 +
 156 +       pr_notice("%s: Couldn't find bootloader size\n", mtd->name);
 157 +       return -1;
 158 +
 159 + found:
 160 +       pr_notice("bootloader size: %d\n", off);
 161 +       return off;
 162 +
 163 +}
 164 +
 165 +/*
 166 + * Copied from mtdblock.c
 167 + *
 168 + * Cache stuff...
 169 + *
 170 + * Since typical flash erasable sectors are much larger than what Linux's
 171 + * buffer cache can handle, we must implement read-modify-write on flash
 172 + * sectors for each block write requests.  To avoid over-erasing flash sectors
 173 + * and to speed things up, we locally cache a whole flash sector while it is
 174 + * being written to until a different sector is required.
 175 + */
 176 +
 177 +static void erase_callback(struct erase_info *done)
 178 +{
 179 +       wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
 180 +       wake_up(wait_q);
 181 +}
 182 +
 183 +static int erase_write(struct mtd_info *mtd, unsigned long pos,
 184 +                       int len, const char *buf)
 185 +{
 186 +       struct erase_info erase;
 187 +       DECLARE_WAITQUEUE(wait, current);
 188 +       wait_queue_head_t wait_q;
 189 +       size_t retlen;
 190 +       int ret;
 191 +
 192 +       /*
 193 +        * First, let's erase the flash block.
 194 +        */
 195 +
 196 +       init_waitqueue_head(&wait_q);
 197 +       erase.mtd = mtd;
 198 +       erase.callback = erase_callback;
 199 +       erase.addr = pos;
 200 +       erase.len = len;
 201 +       erase.priv = (u_long)&wait_q;
 202 +
 203 +       set_current_state(TASK_INTERRUPTIBLE);
 204 +       add_wait_queue(&wait_q, &wait);
 205 +
 206 +       ret = mtd_erase(mtd, &erase);
 207 +       if (ret) {
 208 +               set_current_state(TASK_RUNNING);
 209 +               remove_wait_queue(&wait_q, &wait);
 210 +               pr_warn("erase of region [0x%lx, 0x%x] on \"%s\" failed\n",
 211 +                       pos, len, mtd->name);
 212 +               return ret;
 213 +       }
 214 +
 215 +       schedule();  /* Wait for erase to finish. */
 216 +       remove_wait_queue(&wait_q, &wait);
 217 +
 218 +       /*
 219 +        * Next, write data to flash.
 220 +        */
 221 +
 222 +       ret = mtd_write(mtd, pos, len, &retlen, buf);
 223 +       if (ret)
 224 +               return ret;
 225 +       if (retlen != len)
 226 +               return -EIO;
 227 +       return 0;
 228 +}
 229 +
 230 +
 231 +static int
 232 +find_dual_image_off(struct mtd_info *mtd)
 233 +{
 234 +       struct trx_header trx;
 235 +       int off, blocksize;
 236 +       size_t len;
 237 +
 238 +       blocksize = mtd->erasesize;
 239 +       if (blocksize < 0x10000)
 240 +               blocksize = 0x10000;
 241 +
 242 +       for (off = (128*1024); off < mtd->size; off += blocksize) {
 243 +               memset(&trx, 0xe5, sizeof(trx));
 244 +               /*
 245 +               * Read into buffer
 246 +               */
 247 +               if (mtd_read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
 248 +                   len != sizeof(trx))
 249 +                       continue;
 250 +               /* found last TRX header */
 251 +               if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
 252 +                       if (le32_to_cpu(trx.flag_version >> 16) == 2) {
 253 +                               pr_notice("dual image TRX header found\n");
 254 +                               return mtd->size / 2;
 255 +                       } else {
 256 +                               return 0;
 257 +                       }
 258 +               }
 259 +       }
 260 +       return 0;
 261 +}
 262 +
 263 +
 264 +static int
 265 +find_root(struct mtd_info *mtd, struct mtd_partition *part)
 266 +{
 267 +       struct trx_header trx, *trx2;
 268 +       unsigned char buf[512], *block;
 269 +       int off, blocksize, trxoff = 0;
 270 +       u32 i, crc = ~0;
 271 +       size_t len;
 272 +       bool edimax = false;
 273 +
 274 +       blocksize = mtd->erasesize;
 275 +       if (blocksize < 0x10000)
 276 +               blocksize = 0x10000;
 277 +
 278 +       for (off = (128*1024); off < mtd->size; off += blocksize) {
 279 +               memset(&trx, 0xe5, sizeof(trx));
 280 +
 281 +               /*
 282 +                * Read into buffer
 283 +                */
 284 +               if (mtd_read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
 285 +                   len != sizeof(trx))
 286 +                       continue;
 287 +
 288 +               /* found an edimax header */
 289 +               if (le32_to_cpu(trx.magic) == EDIMAX_PS_HEADER_MAGIC) {
 290 +                       /* read the correct trx header */
 291 +                       if (mtd_read(mtd, off + EDIMAX_PS_HEADER_LEN,
 292 +                           sizeof(trx), &len, (char *) &trx) ||
 293 +                           len != sizeof(trx)) {
 294 +                               continue;
 295 +                       } else {
 296 +                               pr_notice("Found an edimax ps header\n");
 297 +                               edimax = true;
 298 +                       }
 299 +               }
 300 +
 301 +               /* found a TRX header */
 302 +               if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
 303 +                       part->offset = le32_to_cpu(trx.offsets[2]) ? :
 304 +                               le32_to_cpu(trx.offsets[1]);
 305 +                       part->size = le32_to_cpu(trx.len);
 306 +
 307 +                       part->size -= part->offset;
 308 +                       part->offset += off;
 309 +                       if (edimax) {
 310 +                               off += EDIMAX_PS_HEADER_LEN;
 311 +                               trxoff = EDIMAX_PS_HEADER_LEN;
 312 +                       }
 313 +
 314 +                       goto found;
 315 +               }
 316 +       }
 317 +
 318 +       pr_warn("%s: Couldn't find root filesystem\n",
 319 +              mtd->name);
 320 +       return -1;
 321 +
 322 + found:
 323 +       pr_notice("TRX offset : %x\n", trxoff);
 324 +       if (part->size == 0)
 325 +               return 0;
 326 +
 327 +       if (mtd_read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
 328 +               return 0;
 329 +
 330 +       /* Move the fs outside of the trx */
 331 +       part->size = 0;
 332 +
 333 +       if (trx.len != part->offset + part->size - off) {
 334 +               /* Update the trx offsets and length */
 335 +               trx.len = part->offset + part->size - off;
 336 +
 337 +               /* Update the trx crc32 */
 338 +               for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) {
 339 +                       if (mtd_read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf))
 340 +                               return 0;
 341 +                       crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i));
 342 +               }
 343 +               trx.crc32 = crc;
 344 +
 345 +               /* read first eraseblock from the trx */
 346 +               block = kmalloc(mtd->erasesize, GFP_KERNEL);
 347 +               trx2 = (struct trx_header *) block;
 348 +               if (mtd_read(mtd, off - trxoff, mtd->erasesize, &len, block) || len != mtd->erasesize) {
 349 +                       pr_err("Error accessing the first trx eraseblock\n");
 350 +                       return 0;
 351 +               }
 352 +
 353 +               pr_notice("Updating TRX offsets and length:\n");
 354 +               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);
 355 +               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);
 356 +
 357 +               /* Write updated trx header to the flash */
 358 +               memcpy(block + trxoff, &trx, sizeof(trx));
 359 +               if (mtd->_unlock)
 360 +                       mtd->_unlock(mtd, off - trxoff, mtd->erasesize);
 361 +               erase_write(mtd, off - trxoff, mtd->erasesize, block);
 362 +               mtd_sync(mtd);
 363 +               kfree(block);
 364 +               pr_notice("Done\n");
 365 +       }
 366 +
 367 +       return part->size;
 368 +}
 369 +
 370 +static int get_router(void)
 371 +{
 372 +       char buf[20];
 373 +       u32 boardnum = 0;
 374 +       u16 boardtype = 0;
 375 +       u16 boardrev = 0;
 376 +       u32 boardflags = 0;
 377 +       u16 sdram_init = 0;
 378 +       u16 cardbus = 0;
 379 +       u16 strev = 0;
 380 +
 381 +       if (nvram_getenv("boardnum", buf, sizeof(buf)) >= 0)
 382 +               boardnum = simple_strtoul(buf, NULL, 0);
 383 +       if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0)
 384 +               boardtype = simple_strtoul(buf, NULL, 0);
 385 +       if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0)
 386 +               boardrev = simple_strtoul(buf, NULL, 0);
 387 +       if (nvram_getenv("boardflags", buf, sizeof(buf)) >= 0)
 388 +               boardflags = simple_strtoul(buf, NULL, 0);
 389 +       if (nvram_getenv("sdram_init", buf, sizeof(buf)) >= 0)
 390 +               sdram_init = simple_strtoul(buf, NULL, 0);
 391 +       if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 392 +               cardbus = simple_strtoul(buf, NULL, 0);
 393 +       if (nvram_getenv("st_rev", buf, sizeof(buf)) >= 0)
 394 +               strev = simple_strtoul(buf, NULL, 0);
 395 +
 396 +       if ((boardnum == 8 || boardnum == 01)
 397 +         && boardtype == 0x0472 && cardbus == 1) {
 398 +               /* Netgear WNR834B, Netgear WNR834Bv2 */
 399 +               return ROUTER_NETGEAR_WNR834B;
 400 +       }
 401 +
 402 +       if (boardnum == 01 && boardtype == 0x0472 && boardrev == 0x23) {
 403 +               /* Netgear WNDR-3300 */
 404 +               return ROUTER_NETGEAR_WNDR3300;
 405 +       }
 406 +
 407 +       if ((boardnum == 83258 || boardnum == 01)
 408 +         && boardtype == 0x048e
 409 +         && (boardrev == 0x11 || boardrev == 0x10)
 410 +         && boardflags == 0x750
 411 +         && sdram_init == 0x000A) {
 412 +               /* Netgear WGR614v8/L/WW 16MB ram, cfe v1.3 or v1.5 */
 413 +               return ROUTER_NETGEAR_WGR614L;
 414 +       }
 415 +
 416 +       if ((boardnum == 1 || boardnum == 3500)
 417 +         && boardtype == 0x04CF
 418 +         && (boardrev == 0x1213 || boardrev == 02)) {
 419 +               /* Netgear WNR3500v2/U/L */
 420 +               return ROUTER_NETGEAR_WNR3500L;
 421 +       }
 422 +
 423 +       if (boardnum == 1 && boardtype == 0xb4cf && boardrev == 0x1100) {
 424 +               /* Netgear WNDR3400 */
 425 +               return ROUTER_NETGEAR_WNDR3400;
 426 +       }
 427 +
 428 +       if (boardtype == 0x042f
 429 +         && boardrev == 0x10
 430 +         && boardflags == 0
 431 +         && strev == 0x11) {
 432 +               /* Simpletech Simpleshare */
 433 +               return ROUTER_SIMPLETECH_SIMPLESHARE;
 434 +       }
 435 +
 436 +       return 0;
 437 +}
 438 +
 439 +static int parse_bcm47xx_partitions(struct mtd_info *mtd,
 440 +                                   struct mtd_partition **pparts,
 441 +                                   struct mtd_part_parser_data *data)
 442 +{
 443 +       int cfe_size;
 444 +       int dual_image_offset = 0;
 445 +       /* e.g Netgear 0x003e0000-0x003f0000 : "board_data", we exclude this
 446 +        * part from our mapping to prevent overwriting len/checksum on e.g.
 447 +        * Netgear WGR614v8/L/WW
 448 +        */
 449 +       int custom_data_size = 0;
 450 +       struct mtd_partition *bcm47xx_parts;
 451 +
 452 +       cfe_size = find_cfe_size(mtd);
 453 +       if (cfe_size < 0)
 454 +               return 0;
 455 +
 456 +       bcm47xx_parts = kzalloc(sizeof(struct mtd_partition) * 6, GFP_KERNEL);
 457 +
 458 +       bcm47xx_parts[0].name = "cfe";
 459 +       bcm47xx_parts[1].name = "linux";
 460 +       bcm47xx_parts[2].name = "rootfs";
 461 +       bcm47xx_parts[3].name = "nvram";
 462 +
 463 +       /* boot loader */
 464 +       bcm47xx_parts[0].mask_flags = MTD_WRITEABLE;
 465 +       bcm47xx_parts[0].offset = 0;
 466 +       bcm47xx_parts[0].size   = cfe_size;
 467 +
 468 +       /* nvram */
 469 +       if (cfe_size != 384 * 1024) {
 470 +
 471 +               switch (get_router()) {
 472 +               case ROUTER_NETGEAR_WGR614L:
 473 +               case ROUTER_NETGEAR_WNR834B:
 474 +               case ROUTER_NETGEAR_WNDR3300:
 475 +               case ROUTER_NETGEAR_WNR3500L:
 476 +               case ROUTER_NETGEAR_WNDR3400:
 477 +                       /* Netgear: checksum is @ 0x003AFFF8 for 4M flash or checksum
 478 +                        * is @ 0x007AFFF8 for 8M flash
 479 +                        */
 480 +                       custom_data_size = mtd->erasesize;
 481 +
 482 +                       bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize);
 483 +                       bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 484 +
 485 +                       /* Place CFE board_data into a partition */
 486 +                       bcm47xx_parts[4].name = "board_data";
 487 +                       bcm47xx_parts[4].offset = bcm47xx_parts[3].offset - custom_data_size;
 488 +                       bcm47xx_parts[4].size   = custom_data_size;
 489 +                       break;
 490 +
 491 +               case ROUTER_SIMPLETECH_SIMPLESHARE:
 492 +                       /* Fixup Simpletech Simple share nvram  */
 493 +
 494 +                       pr_notice("Setting up simpletech nvram\n");
 495 +                       custom_data_size = mtd->erasesize;
 496 +
 497 +                       bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize) * 2;
 498 +                       bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 499 +
 500 +                       /* Place backup nvram into a partition */
 501 +                       bcm47xx_parts[4].name = "nvram_copy";
 502 +                       bcm47xx_parts[4].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize);
 503 +                       bcm47xx_parts[4].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 504 +                       break;
 505 +
 506 +               default:
 507 +                       bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize);
 508 +                       bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 509 +               }
 510 +
 511 +       } else {
 512 +               /* nvram (old 128kb config partition on netgear wgt634u) */
 513 +               bcm47xx_parts[3].offset = bcm47xx_parts[0].size;
 514 +               bcm47xx_parts[3].size   = roundup(NVRAM_SPACE, mtd->erasesize);
 515 +       }
 516 +
 517 +       /* dual image offset*/
 518 +       pr_notice("Looking for dual image\n");
 519 +       dual_image_offset = find_dual_image_off(mtd);
 520 +       /* linux (kernel and rootfs) */
 521 +       if (cfe_size != 384 * 1024) {
 522 +               if (get_router() == ROUTER_SIMPLETECH_SIMPLESHARE) {
 523 +                       bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
 524 +                       bcm47xx_parts[1].size   = bcm47xx_parts[4].offset - dual_image_offset -
 525 +                               bcm47xx_parts[1].offset - custom_data_size;
 526 +               } else {
 527 +                       bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
 528 +                       bcm47xx_parts[1].size   = bcm47xx_parts[3].offset - dual_image_offset -
 529 +                               bcm47xx_parts[1].offset - custom_data_size;
 530 +               }
 531 +       } else {
 532 +               /* do not count the elf loader, which is on one block */
 533 +               bcm47xx_parts[1].offset = bcm47xx_parts[0].size +
 534 +                       bcm47xx_parts[3].size + mtd->erasesize;
 535 +               bcm47xx_parts[1].size   = mtd->size -
 536 +                       bcm47xx_parts[0].size -
 537 +                       (2*bcm47xx_parts[3].size) -
 538 +                       mtd->erasesize - custom_data_size;
 539 +       }
 540 +
 541 +       /* find and size rootfs */
 542 +       find_root(mtd, &bcm47xx_parts[2]);
 543 +       bcm47xx_parts[2].size = mtd->size - dual_image_offset -
 544 +                               bcm47xx_parts[2].offset -
 545 +                               bcm47xx_parts[3].size - custom_data_size;
 546 +       *pparts = bcm47xx_parts;
 547 +       return bcm47xx_parts[4].name == NULL ? 4 : 5;
 548 +}
 549 +
 550 +static struct mtd_part_parser bcm47xx_parser = {
 551 +       .owner = THIS_MODULE,
 552 +       .parse_fn = parse_bcm47xx_partitions,
 553 +       .name = "bcm47xx",
 554 +};
 555 +
 556 +static int __init bcm47xx_parser_init(void)
 557 +{
 558 +       return register_mtd_parser(&bcm47xx_parser);
 559 +}
 560 +
 561 +static void __exit bcm47xx_parser_exit(void)
 562 +{
 563 +       deregister_mtd_parser(&bcm47xx_parser);
 564 +}
 565 +
 566 +module_init(bcm47xx_parser_init);
 567 +module_exit(bcm47xx_parser_exit);
 568 +
 569 +MODULE_LICENSE("GPL");
 570 +MODULE_DESCRIPTION("Parsing code for flash partitions on bcm47xx SoCs");