I referred to this
http://git.infradead.org/mtd-2.6.git?a=commit;h=69423d99fc182a81f3c5db3eb5c140acc6fc64be
and picked up the MTD NAND specific stuff
> From: Sandeep Paulraj <s-paul...@ti.com>
>
> This patch adds support for NANDs greater than 2 GB.
> Patch is based on the MTD NAND driver in the kernel.
>
> Signed-off-by: Sandeep Paulraj <s-paul...@ti.com>
> ---
> Tested this on the DaVinci DM355 EVM.
> drivers/mtd/nand/nand_base.c | 29 +++++++++++++++++----------
> drivers/mtd/nand/nand_bbt.c | 41 ++++++++++++++++++++++-------------
> ----
> include/linux/mtd/nand.h | 2 +-
> include/linux/mtd/partitions.h | 4 +-
> 4 files changed, 44 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
> index 426bb95..6848f28 100644
> --- a/drivers/mtd/nand/nand_base.c
> +++ b/drivers/mtd/nand/nand_base.c
> @@ -2211,13 +2211,15 @@ static int nand_erase(struct mtd_info *mtd, struct
> erase_info *instr)
> int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
> int allowbbt)
> {
> - int page, len, status, pages_per_block, ret, chipnr;
> + int page, status, pages_per_block, ret, chipnr;
> struct nand_chip *chip = mtd->priv;
> - int rewrite_bbt[CONFIG_SYS_NAND_MAX_CHIPS]={0};
> + loff_t rewrite_bbt[CONFIG_SYS_NAND_MAX_CHIPS] = {0};
> unsigned int bbt_masked_page = 0xffffffff;
> + loff_t len;
>
> - MTDDEBUG (MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len =
> %i\n",
> - (unsigned int) instr->addr, (unsigned int) instr->len);
> + MTDDEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%012llx, "
> + "len = %llu\n", (unsigned long long) instr->addr,
> + (unsigned long long) instr->len);
>
> /* Start address must align on block boundary */
> if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) {
> @@ -2313,7 +2315,7 @@ int nand_erase_nand(struct mtd_info *mtd, struct
> erase_info *instr,
> MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_erase: "
> "Failed erase, page 0x%08x\n", page);
> instr->state = MTD_ERASE_FAILED;
> - instr->fail_addr = (page << chip->page_shift);
> + instr->fail_addr = ((loff_t)page << chip->page_shift);
> goto erase_exit;
> }
>
> @@ -2322,8 +2324,9 @@ int nand_erase_nand(struct mtd_info *mtd, struct
> erase_info *instr,
> * page being erased
> */
> if (bbt_masked_page != 0xffffffff &&
> - (page & BBT_PAGE_MASK) == bbt_masked_page)
> - rewrite_bbt[chipnr] = (page << chip->page_shift);
> + (page & BBT_PAGE_MASK) == bbt_masked_page)
> + rewrite_bbt[chipnr] = ((loff_t)page <<
> + chip->page_shift);
>
> /* Increment page address and decrement length */
> len -= (1 << chip->phys_erase_shift);
> @@ -2370,8 +2373,9 @@ int nand_erase_nand(struct mtd_info *mtd, struct
> erase_info *instr,
> continue;
> /* update the BBT for chip */
> MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt
> "
> - "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr],
> - chip->bbt_td->pages[chipnr]);
> + "(%d:0x%0llx 0x%0x)\n", chipnr,
> + rewrite_bbt[chipnr],
> + chip->bbt_td->pages[chipnr]);
> nand_update_bbt(mtd, rewrite_bbt[chipnr]);
> }
>
> @@ -2566,7 +2570,7 @@ static struct nand_flash_dev
> *nand_get_flash_type(struct mtd_info *mtd,
> if (!mtd->name)
> mtd->name = type->name;
>
> - chip->chipsize = type->chipsize << 20;
> + chip->chipsize = (uint64_t)type->chipsize << 20;
>
> /* Newer devices have all the information in additional id bytes */
> if (!type->pagesize) {
> @@ -2624,7 +2628,10 @@ static struct nand_flash_dev
> *nand_get_flash_type(struct mtd_info *mtd,
>
> chip->bbt_erase_shift = chip->phys_erase_shift =
> ffs(mtd->erasesize) - 1;
> - chip->chip_shift = ffs(chip->chipsize) - 1;
> + if (chip->chipsize & 0xffffffff)
> + chip->chip_shift = ffs(chip->chipsize) - 1;
> + else
> + chip->chip_shift = ffs((unsigned)(chip->chipsize >> 32)) + 31;
>
> /* Set the bad block position */
> chip->badblockpos = mtd->writesize > 512 ?
> diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
> index d68a315..1167c90 100644
> --- a/drivers/mtd/nand/nand_bbt.c
> +++ b/drivers/mtd/nand/nand_bbt.c
> @@ -182,16 +182,19 @@ static int read_bbt(struct mtd_info *mtd, uint8_t
> *buf, int page, int num,
> if (tmp == msk)
> continue;
> if (reserved_block_code && (tmp ==
> reserved_block_code)) {
> - printk(KERN_DEBUG "nand_read_bbt:
> Reserved
> block at 0x%08x\n",
> - ((offs << 2) + (act >> 1)) <<
> this-
> >bbt_erase_shift);
> + printk(KERN_DEBUG "nand_read_bbt:
> Reserved
> block at 0x%012llx\n",
> + (loff_t)((offs << 2) +
> + (act >> 1)) <<
> + this->bbt_erase_shift);
> this->bbt[offs + (act >> 3)] |= 0x2 <<
> (act
> & 0x06);
> mtd->ecc_stats.bbtblocks++;
> continue;
> }
> /* Leave it for now, if its matured we can move
> this
> * message to MTD_DEBUG_LEVEL0 */
> - printk(KERN_DEBUG "nand_read_bbt: Bad block at
> 0x%08x\n",
> - ((offs << 2) + (act >> 1)) << this-
> >bbt_erase_shift);
> + printk(KERN_DEBUG "nand_read_bbt: Bad block at
> 0x%012llx\n",
> + (loff_t)((offs << 2) + (act >> 1)) <<
> + this->bbt_erase_shift);
> /* Factory marked bad or worn out ? */
> if (tmp == 0)
> this->bbt[offs + (act >> 3)] |= 0x3 <<
> (act
> & 0x06);
> @@ -295,8 +298,8 @@ static int read_abs_bbts(struct mtd_info *mtd, uint8_t
> *buf,
>
> /* Read the primary version, if available */
> if (td->options & NAND_BBT_VERSION) {
> - scan_read_raw(mtd, buf, td->pages[0] << this->page_shift,
> - mtd->writesize);
> + scan_read_raw(mtd, buf, (loff_t)td->pages[0] <<
> + this->page_shift, mtd->writesize);
> td->version[0] = buf[mtd->writesize + td->veroffs];
> printk(KERN_DEBUG "Bad block table at page %d, version
> 0x%02X\n",
> td->pages[0], td->version[0]);
> @@ -304,8 +307,8 @@ static int read_abs_bbts(struct mtd_info *mtd, uint8_t
> *buf,
>
> /* Read the mirror version, if available */
> if (md && (md->options & NAND_BBT_VERSION)) {
> - scan_read_raw(mtd, buf, md->pages[0] << this->page_shift,
> - mtd->writesize);
> + scan_read_raw(mtd, buf, (loff_t)md->pages[0] <<
> + this->page_shift, mtd->writesize);
> md->version[0] = buf[mtd->writesize + md->veroffs];
> printk(KERN_DEBUG "Bad block table at page %d, version
> 0x%02X\n",
> md->pages[0], md->version[0]);
> @@ -422,7 +425,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t
> *buf,
> numblocks = this->chipsize >> (this->bbt_erase_shift - 1);
> startblock = chip * numblocks;
> numblocks += startblock;
> - from = startblock << (this->bbt_erase_shift - 1);
> + from = (loff_t)startblock << (this->bbt_erase_shift - 1);
> }
>
> for (i = startblock; i < numblocks;) {
> @@ -440,8 +443,8 @@ static int create_bbt(struct mtd_info *mtd, uint8_t
> *buf,
> if (ret) {
> this->bbt[i >> 3] |= 0x03 << (i & 0x6);
> MTDDEBUG (MTD_DEBUG_LEVEL0,
> - "Bad eraseblock %d at 0x%08x\n",
> - i >> 1, (unsigned int)from);
> + "Bad eraseblock %d at 0x%012llx\n",
> + i >> 1, (unsigned long long)from);
> mtd->ecc_stats.badblocks++;
> }
>
> @@ -507,7 +510,7 @@ static int search_bbt(struct mtd_info *mtd, uint8_t
> *buf, struct nand_bbt_descr
> for (block = 0; block < td->maxblocks; block++) {
>
> int actblock = startblock + dir * block;
> - loff_t offs = actblock << this->bbt_erase_shift;
> + loff_t offs = (loff_t)actblock << this->bbt_erase_shift;
>
> /* Read first page */
> scan_read_raw(mtd, buf, offs, mtd->writesize);
> @@ -731,7 +734,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t
> *buf,
>
> memset(&einfo, 0, sizeof(einfo));
> einfo.mtd = mtd;
> - einfo.addr = (unsigned long)to;
> + einfo.addr = to;
> einfo.len = 1 << this->bbt_erase_shift;
> res = nand_erase_nand(mtd, &einfo, 1);
> if (res < 0)
> @@ -741,8 +744,9 @@ static int write_bbt(struct mtd_info *mtd, uint8_t
> *buf,
> if (res < 0)
> goto outerr;
>
> - printk(KERN_DEBUG "Bad block table written to 0x%08x, version
> "
> - "0x%02X\n", (unsigned int)to, td->version[chip]);
> + printk(KERN_DEBUG "Bad block table written to 0x%012llx, "
> + "version 0x%02X\n", (unsigned long long)to,
> + td->version[chip]);
>
> /* Mark it as used */
> td->pages[chip] = page;
> @@ -922,7 +926,8 @@ static void mark_bbt_region(struct mtd_info *mtd,
> struct nand_bbt_descr *td)
> newval = oldval | (0x2 << (block & 0x06));
> this->bbt[(block >> 3)] = newval;
> if ((oldval != newval) && td->reserved_block_code)
> - nand_update_bbt(mtd, block << (this-
> >bbt_erase_shift - 1));
> + nand_update_bbt(mtd, (loff_t)block <<
> + (this->bbt_erase_shift - 1));
> continue;
> }
> update = 0;
> @@ -943,7 +948,8 @@ static void mark_bbt_region(struct mtd_info *mtd,
> struct nand_bbt_descr *td)
> new ones have been marked, then we need to update the
> stored
> bbts. This should only happen once. */
> if (update && td->reserved_block_code)
> - nand_update_bbt(mtd, (block - 2) << (this-
> >bbt_erase_shift - 1));
> + nand_update_bbt(mtd, (loff_t)(block - 2) <<
> + (this->bbt_erase_shift - 1));
> }
> }
>
> @@ -1039,7 +1045,6 @@ int nand_update_bbt(struct mtd_info *mtd, loff_t
> offs)
> if (!this->bbt || !td)
> return -EINVAL;
>
> - len = mtd->size >> (this->bbt_erase_shift + 2);
> /* Allocate a temporary buffer for one eraseblock incl. oob */
> len = (1 << this->bbt_erase_shift);
> len += (len >> this->page_shift) * mtd->oobsize;
> diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
> index cb7c19a..94ad0c0 100644
> --- a/include/linux/mtd/nand.h
> +++ b/include/linux/mtd/nand.h
> @@ -397,7 +397,7 @@ struct nand_chip {
> int bbt_erase_shift;
> int chip_shift;
> int numchips;
> - unsigned long chipsize;
> + uint64_t chipsize;
> int pagemask;
> int pagebuf;
> int subpagesize;
> diff --git a/include/linux/mtd/partitions.h
> b/include/linux/mtd/partitions.h
> index 1016675..d1d9a96 100644
> --- a/include/linux/mtd/partitions.h
> +++ b/include/linux/mtd/partitions.h
> @@ -38,8 +38,8 @@
>
> struct mtd_partition {
> char *name; /* identifier string */
> - u_int32_t size; /* partition size */
> - u_int32_t offset; /* offset within the master MTD space */
> + uint64_t size; /* partition size */
> + uint64_t offset; /* offset within the master MTD space */
> u_int32_t mask_flags; /* master MTD flags to mask out for
> this partition */
> struct nand_ecclayout *ecclayout; /* out of band layout for this
> partition (NAND only)*/
> struct mtd_info **mtdp; /* pointer to store the MTD object */
> --
> 1.6.0.4
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