I referred to this
http://git.infradead.org/mtd-2.6.git?a=commit;h=69423d99fc182a81f3c5db3eb5c1...
and picked up the MTD NAND specific stuff
From: Sandeep Paulraj s-paulraj@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-paulraj@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]);@@ -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: Reservedblock at 0x%08x\n",
((offs << 2) + (act >> 1)) << this-bbt_erase_shift);
printk(KERN_DEBUG "nand_read_bbt: Reservedblock 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 at0x%08x\n",
((offs << 2) + (act >> 1)) << this-bbt_erase_shift);
printk(KERN_DEBUG "nand_read_bbt: Bad block at0x%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);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);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;@@ -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;@@ -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