| 1 | From 1934b89b42976a083c2ad8d8fdc526ab5b05c5e4 Mon Sep 17 00:00:00 2001 |
| 2 | From: Hauke Mehrtens <hauke@hauke-m.de> |
| 3 | Date: Sun, 17 Jul 2011 14:54:11 +0200 |
| 4 | Subject: [PATCH 17/26] mtd: bcm47xx: add bcm47xx part parser |
| 5 | |
| 6 | |
| 7 | Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> |
| 8 | --- |
| 9 | drivers/mtd/Kconfig | 7 + |
| 10 | drivers/mtd/Makefile | 1 + |
| 11 | drivers/mtd/bcm47xxpart.c | 536 +++++++++++++++++++++++++++++++++++++++++++++ |
| 12 | 3 files changed, 544 insertions(+), 0 deletions(-) |
| 13 | create mode 100644 drivers/mtd/bcm47xxpart.c |
| 14 | |
| 15 | --- a/drivers/mtd/Kconfig |
| 16 | +++ b/drivers/mtd/Kconfig |
| 17 | @@ -173,6 +173,13 @@ config MTD_MYLOADER_PARTS |
| 18 | You will still need the parsing functions to be called by the driver |
| 19 | for your particular device. It won't happen automatically. |
| 20 | |
| 21 | +config MTD_BCM47XX_PARTS |
| 22 | + tristate "BCM47XX partitioning support" |
| 23 | + default y |
| 24 | + depends on BCM47XX |
| 25 | + ---help--- |
| 26 | + bcm47XX partitioning support |
| 27 | + |
| 28 | comment "User Modules And Translation Layers" |
| 29 | |
| 30 | config MTD_CHAR |
| 31 | --- a/drivers/mtd/Makefile |
| 32 | +++ b/drivers/mtd/Makefile |
| 33 | @@ -12,6 +12,7 @@ obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdli |
| 34 | obj-$(CONFIG_MTD_AFS_PARTS) += afs.o |
| 35 | obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o |
| 36 | obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o |
| 37 | +obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o |
| 38 | |
| 39 | # 'Users' - code which presents functionality to userspace. |
| 40 | obj-$(CONFIG_MTD_CHAR) += mtdchar.o |
| 41 | --- /dev/null |
| 42 | +++ b/drivers/mtd/bcm47xxpart.c |
| 43 | @@ -0,0 +1,536 @@ |
| 44 | +/* |
| 45 | + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> |
| 46 | + * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org> |
| 47 | + * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) |
| 48 | + * |
| 49 | + * original functions for finding root filesystem from Mike Baker |
| 50 | + * |
| 51 | + * This program is free software; you can redistribute it and/or modify it |
| 52 | + * under the terms of the GNU General Public License as published by the |
| 53 | + * Free Software Foundation; either version 2 of the License, or (at your |
| 54 | + * option) any later version. |
| 55 | + * |
| 56 | + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 57 | + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 58 | + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 59 | + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 60 | + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 61 | + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 62 | + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 63 | + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 64 | + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 65 | + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 66 | + * |
| 67 | + * You should have received a copy of the GNU General Public License along |
| 68 | + * with this program; if not, write to the Free Software Foundation, Inc., |
| 69 | + * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 70 | + * |
| 71 | + * Copyright 2001-2003, Broadcom Corporation |
| 72 | + * All Rights Reserved. |
| 73 | + * |
| 74 | + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY |
| 75 | + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM |
| 76 | + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS |
| 77 | + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. |
| 78 | + * |
| 79 | + * Flash mapping for BCM947XX boards |
| 80 | + */ |
| 81 | + |
| 82 | +#define pr_fmt(fmt) "bcm47xx_part: " fmt |
| 83 | +#include <linux/init.h> |
| 84 | +#include <linux/module.h> |
| 85 | +#include <linux/types.h> |
| 86 | +#include <linux/kernel.h> |
| 87 | +#include <linux/sched.h> |
| 88 | +#include <linux/wait.h> |
| 89 | +#include <linux/mtd/mtd.h> |
| 90 | +#include <linux/mtd/partitions.h> |
| 91 | +#include <linux/crc32.h> |
| 92 | +#include <linux/io.h> |
| 93 | +#include <asm/mach-bcm47xx/nvram.h> |
| 94 | +#include <asm/mach-bcm47xx/bcm47xx.h> |
| 95 | +#include <asm/fw/cfe/cfe_api.h> |
| 96 | + |
| 97 | + |
| 98 | +#define TRX_MAGIC 0x30524448 /* "HDR0" */ |
| 99 | +#define TRX_VERSION 1 |
| 100 | +#define TRX_MAX_LEN 0x3A0000 |
| 101 | +#define TRX_NO_HEADER 1 /* Do not write TRX header */ |
| 102 | +#define TRX_GZ_FILES 0x2 /* Contains up to TRX_MAX_OFFSET individual gzip files */ |
| 103 | +#define TRX_MAX_OFFSET 3 |
| 104 | + |
| 105 | +struct trx_header { |
| 106 | + u32 magic; /* "HDR0" */ |
| 107 | + u32 len; /* Length of file including header */ |
| 108 | + u32 crc32; /* 32-bit CRC from flag_version to end of file */ |
| 109 | + u32 flag_version; /* 0:15 flags, 16:31 version */ |
| 110 | + u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */ |
| 111 | +}; |
| 112 | + |
| 113 | +/* for Edimax Print servers which use an additional header |
| 114 | + * then the firmware on flash looks like : |
| 115 | + * EDIMAX HEADER | TRX HEADER |
| 116 | + * As this header is 12 bytes long we have to handle it |
| 117 | + * and skip it to find the TRX header |
| 118 | + */ |
| 119 | +#define EDIMAX_PS_HEADER_MAGIC 0x36315350 /* "PS16" */ |
| 120 | +#define EDIMAX_PS_HEADER_LEN 0xc /* 12 bytes long for edimax header */ |
| 121 | + |
| 122 | +#define NVRAM_SPACE 0x8000 |
| 123 | + |
| 124 | +#define ROUTER_NETGEAR_WGR614L 1 |
| 125 | +#define ROUTER_NETGEAR_WNR834B 2 |
| 126 | +#define ROUTER_NETGEAR_WNDR3300 3 |
| 127 | +#define ROUTER_NETGEAR_WNR3500L 4 |
| 128 | +#define ROUTER_SIMPLETECH_SIMPLESHARE 5 |
| 129 | + |
| 130 | +static struct mtd_partition bcm47xx_parts[] = { |
| 131 | + { name: "cfe", offset:0, size:0, mask_flags:MTD_WRITEABLE, }, |
| 132 | + { name: "linux", offset:0, size:0, }, |
| 133 | + { name: "rootfs", offset:0, size:0, }, |
| 134 | + { name: "nvram", offset:0, size:0, }, |
| 135 | + { name: NULL, }, /* Used to create custom partitons with the function get_router() */ |
| 136 | + { name: NULL, }, |
| 137 | +}; |
| 138 | + |
| 139 | +static int |
| 140 | +find_cfe_size(struct mtd_info *mtd) |
| 141 | +{ |
| 142 | + struct trx_header *trx; |
| 143 | + unsigned char buf[512]; |
| 144 | + int off; |
| 145 | + size_t len; |
| 146 | + int blocksize; |
| 147 | + |
| 148 | + trx = (struct trx_header *) buf; |
| 149 | + |
| 150 | + blocksize = mtd->erasesize; |
| 151 | + if (blocksize < 0x10000) |
| 152 | + blocksize = 0x10000; |
| 153 | + |
| 154 | + for (off = (128*1024); off < mtd->size; off += blocksize) { |
| 155 | + memset(buf, 0xe5, sizeof(buf)); |
| 156 | + |
| 157 | + /* |
| 158 | + * Read into buffer |
| 159 | + */ |
| 160 | + if (mtd->read(mtd, off, sizeof(buf), &len, buf) || |
| 161 | + len != sizeof(buf)) |
| 162 | + continue; |
| 163 | + |
| 164 | + if (le32_to_cpu(trx->magic) == EDIMAX_PS_HEADER_MAGIC) { |
| 165 | + if (mtd->read(mtd, off + EDIMAX_PS_HEADER_LEN, |
| 166 | + sizeof(buf), &len, buf) || len != sizeof(buf)) { |
| 167 | + continue; |
| 168 | + } else { |
| 169 | + pr_notice("Found edimax header\n"); |
| 170 | + } |
| 171 | + } |
| 172 | + |
| 173 | + /* found a TRX header */ |
| 174 | + if (le32_to_cpu(trx->magic) == TRX_MAGIC) |
| 175 | + goto found; |
| 176 | + } |
| 177 | + |
| 178 | + pr_notice("%s: Couldn't find bootloader size\n", mtd->name); |
| 179 | + return -1; |
| 180 | + |
| 181 | + found: |
| 182 | + pr_notice("bootloader size: %d\n", off); |
| 183 | + return off; |
| 184 | + |
| 185 | +} |
| 186 | + |
| 187 | +/* |
| 188 | + * Copied from mtdblock.c |
| 189 | + * |
| 190 | + * Cache stuff... |
| 191 | + * |
| 192 | + * Since typical flash erasable sectors are much larger than what Linux's |
| 193 | + * buffer cache can handle, we must implement read-modify-write on flash |
| 194 | + * sectors for each block write requests. To avoid over-erasing flash sectors |
| 195 | + * and to speed things up, we locally cache a whole flash sector while it is |
| 196 | + * being written to until a different sector is required. |
| 197 | + */ |
| 198 | + |
| 199 | +static void erase_callback(struct erase_info *done) |
| 200 | +{ |
| 201 | + wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv; |
| 202 | + wake_up(wait_q); |
| 203 | +} |
| 204 | + |
| 205 | +static int erase_write(struct mtd_info *mtd, unsigned long pos, |
| 206 | + int len, const char *buf) |
| 207 | +{ |
| 208 | + struct erase_info erase; |
| 209 | + DECLARE_WAITQUEUE(wait, current); |
| 210 | + wait_queue_head_t wait_q; |
| 211 | + size_t retlen; |
| 212 | + int ret; |
| 213 | + |
| 214 | + /* |
| 215 | + * First, let's erase the flash block. |
| 216 | + */ |
| 217 | + |
| 218 | + init_waitqueue_head(&wait_q); |
| 219 | + erase.mtd = mtd; |
| 220 | + erase.callback = erase_callback; |
| 221 | + erase.addr = pos; |
| 222 | + erase.len = len; |
| 223 | + erase.priv = (u_long)&wait_q; |
| 224 | + |
| 225 | + set_current_state(TASK_INTERRUPTIBLE); |
| 226 | + add_wait_queue(&wait_q, &wait); |
| 227 | + |
| 228 | + ret = mtd->erase(mtd, &erase); |
| 229 | + if (ret) { |
| 230 | + set_current_state(TASK_RUNNING); |
| 231 | + remove_wait_queue(&wait_q, &wait); |
| 232 | + pr_warn("erase of region [0x%lx, 0x%x] on \"%s\" failed\n", |
| 233 | + pos, len, mtd->name); |
| 234 | + return ret; |
| 235 | + } |
| 236 | + |
| 237 | + schedule(); /* Wait for erase to finish. */ |
| 238 | + remove_wait_queue(&wait_q, &wait); |
| 239 | + |
| 240 | + /* |
| 241 | + * Next, write data to flash. |
| 242 | + */ |
| 243 | + |
| 244 | + ret = mtd->write(mtd, pos, len, &retlen, buf); |
| 245 | + if (ret) |
| 246 | + return ret; |
| 247 | + if (retlen != len) |
| 248 | + return -EIO; |
| 249 | + return 0; |
| 250 | +} |
| 251 | + |
| 252 | + |
| 253 | +static int |
| 254 | +find_dual_image_off(struct mtd_info *mtd) |
| 255 | +{ |
| 256 | + struct trx_header trx; |
| 257 | + int off, blocksize; |
| 258 | + size_t len; |
| 259 | + |
| 260 | + blocksize = mtd->erasesize; |
| 261 | + if (blocksize < 0x10000) |
| 262 | + blocksize = 0x10000; |
| 263 | + |
| 264 | + for (off = (128*1024); off < mtd->size; off += blocksize) { |
| 265 | + memset(&trx, 0xe5, sizeof(trx)); |
| 266 | + /* |
| 267 | + * Read into buffer |
| 268 | + */ |
| 269 | + if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) || |
| 270 | + len != sizeof(trx)) |
| 271 | + continue; |
| 272 | + /* found last TRX header */ |
| 273 | + if (le32_to_cpu(trx.magic) == TRX_MAGIC) { |
| 274 | + if (le32_to_cpu(trx.flag_version >> 16) == 2) { |
| 275 | + pr_notice("dual image TRX header found\n"); |
| 276 | + return mtd->size / 2; |
| 277 | + } else { |
| 278 | + return 0; |
| 279 | + } |
| 280 | + } |
| 281 | + } |
| 282 | + return 0; |
| 283 | +} |
| 284 | + |
| 285 | + |
| 286 | +static int |
| 287 | +find_root(struct mtd_info *mtd, struct mtd_partition *part) |
| 288 | +{ |
| 289 | + struct trx_header trx, *trx2; |
| 290 | + unsigned char buf[512], *block; |
| 291 | + int off, blocksize, trxoff = 0; |
| 292 | + u32 i, crc = ~0; |
| 293 | + size_t len; |
| 294 | + bool edimax = false; |
| 295 | + |
| 296 | + blocksize = mtd->erasesize; |
| 297 | + if (blocksize < 0x10000) |
| 298 | + blocksize = 0x10000; |
| 299 | + |
| 300 | + for (off = (128*1024); off < mtd->size; off += blocksize) { |
| 301 | + memset(&trx, 0xe5, sizeof(trx)); |
| 302 | + |
| 303 | + /* |
| 304 | + * Read into buffer |
| 305 | + */ |
| 306 | + if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) || |
| 307 | + len != sizeof(trx)) |
| 308 | + continue; |
| 309 | + |
| 310 | + /* found an edimax header */ |
| 311 | + if (le32_to_cpu(trx.magic) == EDIMAX_PS_HEADER_MAGIC) { |
| 312 | + /* read the correct trx header */ |
| 313 | + if (mtd->read(mtd, off + EDIMAX_PS_HEADER_LEN, |
| 314 | + sizeof(trx), &len, (char *) &trx) || |
| 315 | + len != sizeof(trx)) { |
| 316 | + continue; |
| 317 | + } else { |
| 318 | + pr_notice("Found an edimax ps header\n"); |
| 319 | + edimax = true; |
| 320 | + } |
| 321 | + } |
| 322 | + |
| 323 | + /* found a TRX header */ |
| 324 | + if (le32_to_cpu(trx.magic) == TRX_MAGIC) { |
| 325 | + part->offset = le32_to_cpu(trx.offsets[2]) ? : |
| 326 | + le32_to_cpu(trx.offsets[1]); |
| 327 | + part->size = le32_to_cpu(trx.len); |
| 328 | + |
| 329 | + part->size -= part->offset; |
| 330 | + part->offset += off; |
| 331 | + if (edimax) { |
| 332 | + off += EDIMAX_PS_HEADER_LEN; |
| 333 | + trxoff = EDIMAX_PS_HEADER_LEN; |
| 334 | + } |
| 335 | + |
| 336 | + goto found; |
| 337 | + } |
| 338 | + } |
| 339 | + |
| 340 | + pr_warn("%s: Couldn't find root filesystem\n", |
| 341 | + mtd->name); |
| 342 | + return -1; |
| 343 | + |
| 344 | + found: |
| 345 | + pr_notice("TRX offset : %x\n", trxoff); |
| 346 | + if (part->size == 0) |
| 347 | + return 0; |
| 348 | + |
| 349 | + if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf)) |
| 350 | + return 0; |
| 351 | + |
| 352 | + /* Move the fs outside of the trx */ |
| 353 | + part->size = 0; |
| 354 | + |
| 355 | + if (trx.len != part->offset + part->size - off) { |
| 356 | + /* Update the trx offsets and length */ |
| 357 | + trx.len = part->offset + part->size - off; |
| 358 | + |
| 359 | + /* Update the trx crc32 */ |
| 360 | + for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) { |
| 361 | + if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf)) |
| 362 | + return 0; |
| 363 | + crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i)); |
| 364 | + } |
| 365 | + trx.crc32 = crc; |
| 366 | + |
| 367 | + /* read first eraseblock from the trx */ |
| 368 | + block = kmalloc(mtd->erasesize, GFP_KERNEL); |
| 369 | + trx2 = (struct trx_header *) block; |
| 370 | + if (mtd->read(mtd, off - trxoff, mtd->erasesize, &len, block) || len != mtd->erasesize) { |
| 371 | + pr_err("Error accessing the first trx eraseblock\n"); |
| 372 | + return 0; |
| 373 | + } |
| 374 | + |
| 375 | + pr_notice("Updating TRX offsets and length:\n"); |
| 376 | + 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); |
| 377 | + 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); |
| 378 | + |
| 379 | + /* Write updated trx header to the flash */ |
| 380 | + memcpy(block + trxoff, &trx, sizeof(trx)); |
| 381 | + if (mtd->unlock) |
| 382 | + mtd->unlock(mtd, off - trxoff, mtd->erasesize); |
| 383 | + erase_write(mtd, off - trxoff, mtd->erasesize, block); |
| 384 | + if (mtd->sync) |
| 385 | + mtd->sync(mtd); |
| 386 | + kfree(block); |
| 387 | + pr_notice("Done\n"); |
| 388 | + } |
| 389 | + |
| 390 | + return part->size; |
| 391 | +} |
| 392 | + |
| 393 | +static int get_router(void) |
| 394 | +{ |
| 395 | + char buf[20]; |
| 396 | + u32 boardnum = 0; |
| 397 | + u16 boardtype = 0; |
| 398 | + u16 boardrev = 0; |
| 399 | + u32 boardflags = 0; |
| 400 | + u16 sdram_init = 0; |
| 401 | + u16 cardbus = 0; |
| 402 | + u16 strev = 0; |
| 403 | + |
| 404 | + if (nvram_getenv("boardnum", buf, sizeof(buf)) >= 0) |
| 405 | + boardnum = simple_strtoul(buf, NULL, 0); |
| 406 | + if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0) |
| 407 | + boardtype = simple_strtoul(buf, NULL, 0); |
| 408 | + if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0) |
| 409 | + boardrev = simple_strtoul(buf, NULL, 0); |
| 410 | + if (nvram_getenv("boardflags", buf, sizeof(buf)) >= 0) |
| 411 | + boardflags = simple_strtoul(buf, NULL, 0); |
| 412 | + if (nvram_getenv("sdram_init", buf, sizeof(buf)) >= 0) |
| 413 | + sdram_init = simple_strtoul(buf, NULL, 0); |
| 414 | + if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) |
| 415 | + cardbus = simple_strtoul(buf, NULL, 0); |
| 416 | + if (nvram_getenv("st_rev", buf, sizeof(buf)) >= 0) |
| 417 | + strev = simple_strtoul(buf, NULL, 0); |
| 418 | + |
| 419 | + if ((boardnum == 8 || boardnum == 01) |
| 420 | + && boardtype == 0x0472 && cardbus == 1) { |
| 421 | + /* Netgear WNR834B, Netgear WNR834Bv2 */ |
| 422 | + return ROUTER_NETGEAR_WNR834B; |
| 423 | + } |
| 424 | + |
| 425 | + if (boardnum == 01 && boardtype == 0x0472 && boardrev == 0x23) { |
| 426 | + /* Netgear WNDR-3300 */ |
| 427 | + return ROUTER_NETGEAR_WNDR3300; |
| 428 | + } |
| 429 | + |
| 430 | + if ((boardnum == 83258 || boardnum == 01) |
| 431 | + && boardtype == 0x048e |
| 432 | + && (boardrev == 0x11 || boardrev == 0x10) |
| 433 | + && boardflags == 0x750 |
| 434 | + && sdram_init == 0x000A) { |
| 435 | + /* Netgear WGR614v8/L/WW 16MB ram, cfe v1.3 or v1.5 */ |
| 436 | + return ROUTER_NETGEAR_WGR614L; |
| 437 | + } |
| 438 | + |
| 439 | + if ((boardnum == 1 || boardnum == 3500) |
| 440 | + && boardtype == 0x04CF |
| 441 | + && (boardrev == 0x1213 || boardrev == 02)) { |
| 442 | + /* Netgear WNR3500v2/U/L */ |
| 443 | + return ROUTER_NETGEAR_WNR3500L; |
| 444 | + } |
| 445 | + |
| 446 | + if (boardtype == 0x042f |
| 447 | + && boardrev == 0x10 |
| 448 | + && boardflags == 0 |
| 449 | + && strev == 0x11) { |
| 450 | + /* Simpletech Simpleshare */ |
| 451 | + return ROUTER_SIMPLETECH_SIMPLESHARE; |
| 452 | + } |
| 453 | + |
| 454 | + return 0; |
| 455 | +} |
| 456 | + |
| 457 | +static int parse_bcm47xx_partitions(struct mtd_info *mtd, |
| 458 | + struct mtd_partition **pparts, |
| 459 | +// struct mtd_part_parser_data *data) |
| 460 | + unsigned long data) |
| 461 | +{ |
| 462 | + int cfe_size; |
| 463 | + int dual_image_offset = 0; |
| 464 | + /* e.g Netgear 0x003e0000-0x003f0000 : "board_data", we exclude this |
| 465 | + * part from our mapping to prevent overwriting len/checksum on e.g. |
| 466 | + * Netgear WGR614v8/L/WW |
| 467 | + */ |
| 468 | + int custom_data_size = 0; |
| 469 | + |
| 470 | + cfe_size = find_cfe_size(mtd); |
| 471 | + if (cfe_size < 0) |
| 472 | + return 0; |
| 473 | + |
| 474 | + /* boot loader */ |
| 475 | + bcm47xx_parts[0].offset = 0; |
| 476 | + bcm47xx_parts[0].size = cfe_size; |
| 477 | + |
| 478 | + /* nvram */ |
| 479 | + if (cfe_size != 384 * 1024) { |
| 480 | + |
| 481 | + switch (get_router()) { |
| 482 | + case ROUTER_NETGEAR_WGR614L: |
| 483 | + case ROUTER_NETGEAR_WNR834B: |
| 484 | + case ROUTER_NETGEAR_WNDR3300: |
| 485 | + case ROUTER_NETGEAR_WNR3500L: |
| 486 | + /* Netgear: checksum is @ 0x003AFFF8 for 4M flash or checksum |
| 487 | + * is @ 0x007AFFF8 for 8M flash |
| 488 | + */ |
| 489 | + custom_data_size = mtd->erasesize; |
| 490 | + |
| 491 | + bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize); |
| 492 | + bcm47xx_parts[3].size = roundup(NVRAM_SPACE, mtd->erasesize); |
| 493 | + |
| 494 | + /* Place CFE board_data into a partition */ |
| 495 | + bcm47xx_parts[4].name = "board_data"; |
| 496 | + bcm47xx_parts[4].offset = bcm47xx_parts[3].offset - custom_data_size; |
| 497 | + bcm47xx_parts[4].size = custom_data_size; |
| 498 | + break; |
| 499 | + |
| 500 | + case ROUTER_SIMPLETECH_SIMPLESHARE: |
| 501 | + /* Fixup Simpletech Simple share nvram */ |
| 502 | + |
| 503 | + pr_notice("Setting up simpletech nvram\n"); |
| 504 | + custom_data_size = mtd->erasesize; |
| 505 | + |
| 506 | + bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize) * 2; |
| 507 | + bcm47xx_parts[3].size = roundup(NVRAM_SPACE, mtd->erasesize); |
| 508 | + |
| 509 | + /* Place backup nvram into a partition */ |
| 510 | + bcm47xx_parts[4].name = "nvram_copy"; |
| 511 | + bcm47xx_parts[4].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize); |
| 512 | + bcm47xx_parts[4].size = roundup(NVRAM_SPACE, mtd->erasesize); |
| 513 | + break; |
| 514 | + |
| 515 | + default: |
| 516 | + bcm47xx_parts[3].offset = mtd->size - roundup(NVRAM_SPACE, mtd->erasesize); |
| 517 | + bcm47xx_parts[3].size = roundup(NVRAM_SPACE, mtd->erasesize); |
| 518 | + } |
| 519 | + |
| 520 | + } else { |
| 521 | + /* nvram (old 128kb config partition on netgear wgt634u) */ |
| 522 | + bcm47xx_parts[3].offset = bcm47xx_parts[0].size; |
| 523 | + bcm47xx_parts[3].size = roundup(NVRAM_SPACE, mtd->erasesize); |
| 524 | + } |
| 525 | + |
| 526 | + /* dual image offset*/ |
| 527 | + pr_notice("Looking for dual image\n"); |
| 528 | + dual_image_offset = find_dual_image_off(mtd); |
| 529 | + /* linux (kernel and rootfs) */ |
| 530 | + if (cfe_size != 384 * 1024) { |
| 531 | + if (get_router() == ROUTER_SIMPLETECH_SIMPLESHARE) { |
| 532 | + bcm47xx_parts[1].offset = bcm47xx_parts[0].size; |
| 533 | + bcm47xx_parts[1].size = bcm47xx_parts[4].offset - dual_image_offset - |
| 534 | + bcm47xx_parts[1].offset - custom_data_size; |
| 535 | + } else { |
| 536 | + bcm47xx_parts[1].offset = bcm47xx_parts[0].size; |
| 537 | + bcm47xx_parts[1].size = bcm47xx_parts[3].offset - dual_image_offset - |
| 538 | + bcm47xx_parts[1].offset - custom_data_size; |
| 539 | + } |
| 540 | + } else { |
| 541 | + /* do not count the elf loader, which is on one block */ |
| 542 | + bcm47xx_parts[1].offset = bcm47xx_parts[0].size + |
| 543 | + bcm47xx_parts[3].size + mtd->erasesize; |
| 544 | + bcm47xx_parts[1].size = mtd->size - |
| 545 | + bcm47xx_parts[0].size - |
| 546 | + (2*bcm47xx_parts[3].size) - |
| 547 | + mtd->erasesize - custom_data_size; |
| 548 | + } |
| 549 | + |
| 550 | + /* find and size rootfs */ |
| 551 | + find_root(mtd, &bcm47xx_parts[2]); |
| 552 | + bcm47xx_parts[2].size = mtd->size - dual_image_offset - |
| 553 | + bcm47xx_parts[2].offset - |
| 554 | + bcm47xx_parts[3].size - custom_data_size; |
| 555 | + *pparts = bcm47xx_parts; |
| 556 | + return bcm47xx_parts[4].name == NULL ? 4 : 5; |
| 557 | +} |
| 558 | + |
| 559 | +static struct mtd_part_parser bcm47xx_parser = { |
| 560 | + .owner = THIS_MODULE, |
| 561 | + .parse_fn = parse_bcm47xx_partitions, |
| 562 | + .name = "bcm47xx", |
| 563 | +}; |
| 564 | + |
| 565 | +static int __init bcm47xx_parser_init(void) |
| 566 | +{ |
| 567 | + return register_mtd_parser(&bcm47xx_parser); |
| 568 | +} |
| 569 | + |
| 570 | +static void __exit bcm47xx_parser_exit(void) |
| 571 | +{ |
| 572 | + deregister_mtd_parser(&bcm47xx_parser); |
| 573 | +} |
| 574 | + |
| 575 | +module_init(bcm47xx_parser_init); |
| 576 | +module_exit(bcm47xx_parser_exit); |
| 577 | + |
| 578 | +MODULE_LICENSE("GPL"); |
| 579 | +MODULE_DESCRIPTION("Parsing code for flash partitions on bcm47xx SoCs"); |
| 580 | |