@@ -1059,7 +1059,7 @@ static int __init read_factory_bbt(struct mtd_info *mtd)
* operation after device power-up. The above read ensures it never is.
* Ugly, I know.
*/
- if (nand->bbt == NULL) /* no memory-based bbt */
+ if (!nand_bbt_is_initialized(mtd_to_nand(mtd)))
goto exit;
if (mtd->ecc_stats.failed > eccfailed_stats) {
@@ -1086,8 +1086,9 @@ static int __init read_factory_bbt(struct mtd_info *mtd)
unsigned long bits = ~buf[i];
for_each_set_bit(bitnum, &bits, 8) {
int badblock = block + 7 - bitnum;
- nand->bbt[badblock / 4] |=
- 0x03 << ((badblock % 4) * 2);
+
+ nand_bbt_update_entry(mtd_to_nand(mtd), badblock,
+ NAND_BBT_BLOCK_FACTORY_BAD);
mtd->ecc_stats.badblocks++;
dev_notice(doc->dev, "factory-marked bad block: %d\n",
badblock);
@@ -512,6 +512,7 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
static int nand_block_markbad_lowlevel(struct mtd_info *mtd, loff_t ofs)
{
struct nand_chip *chip = mtd_to_nandchip(mtd);
+ struct nand_device *nand = mtd_to_nand(mtd);
int res, ret = 0;
if (!(chip->bbt_options & NAND_BBT_NO_OOB_BBM)) {
@@ -531,8 +532,8 @@ static int nand_block_markbad_lowlevel(struct mtd_info *mtd, loff_t ofs)
}
/* Mark block bad in BBT */
- if (chip->bbt) {
- res = nand_markbad_bbt(mtd, ofs);
+ if (nand_bbt_is_initialized(nand)) {
+ res = nand_markbad_bbt(nand, ofs);
if (!ret)
ret = res;
}
@@ -572,12 +573,12 @@ static int nand_check_wp(struct mtd_info *mtd)
*/
static int nand_block_isreserved(struct mtd_info *mtd, loff_t ofs)
{
- struct nand_chip *chip = mtd_to_nandchip(mtd);
+ struct nand_device *nand = mtd_to_nand(mtd);
- if (!chip->bbt)
+ if (!nand_bbt_is_initialized(nand))
return 0;
/* Return info from the table */
- return nand_isreserved_bbt(mtd, ofs);
+ return nand_isreserved_bbt(nand, ofs);
}
/**
@@ -591,13 +592,14 @@ static int nand_block_isreserved(struct mtd_info *mtd, loff_t ofs)
*/
static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int allowbbt)
{
+ struct nand_device *nand = mtd_to_nand(mtd);
struct nand_chip *chip = mtd_to_nandchip(mtd);
- if (!chip->bbt)
+ if (!nand_bbt_is_initialized(nand))
return chip->block_bad(mtd, ofs);
/* Return info from the table */
- return nand_isbad_bbt(mtd, ofs, allowbbt);
+ return nand_isbad_bbt(nand, ofs, allowbbt);
}
/**
@@ -3457,6 +3459,75 @@ static void nand_shutdown(struct mtd_info *mtd)
nand_get_device(mtd, FL_PM_SUSPENDED);
}
+/*
+ * Define some generic bad / good block scan pattern which are used
+ * while scanning a device for factory marked good / bad blocks.
+ */
+static u8 scan_ff_pattern[] = { 0xff, 0xff };
+
+#define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB)
+
+/**
+ * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure
+ * @this: NAND chip to create descriptor for
+ *
+ * This function allocates and initializes a nand_bbt_descr for BBM detection
+ * based on the properties of @this. The new descriptor is stored in
+ * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when
+ * passed to this function.
+ */
+static int nand_create_badblock_pattern(struct nand_chip *chip)
+{
+ struct nand_device *this = &chip->base.base;
+ struct nand_bbt_descr *bd;
+
+ if (this->bbt.bbp) {
+ pr_warn("Bad block pattern already allocated; not replacing\n");
+ return -EINVAL;
+ }
+
+ bd = kzalloc(sizeof(*bd), GFP_KERNEL);
+ if (!bd)
+ return -ENOMEM;
+
+ bd->options = this->bbt.options & BADBLOCK_SCAN_MASK;
+ bd->offs = chip->badblockpos;
+ bd->len = (chip->options & NAND_BUSWIDTH_16) ? 2 : 1;
+ bd->pattern = scan_ff_pattern;
+ bd->options |= NAND_BBT_DYNAMICSTRUCT;
+ this->bbt.bbp = bd;
+
+ return 0;
+}
+
+/**
+ * nand_default_bbt - Select a default bad block table for the device
+ * @mtd: MTD device structure
+ *
+ * This function selects the default bad block table support for the device and
+ * calls the nand_scan_bbt function.
+ */
+static int nand_default_bbt(struct mtd_info *mtd)
+{
+ struct nand_device *this = mtd_to_nand(mtd);
+ struct nand_chip *chip = mtd_to_nandchip(mtd);
+ int ret;
+
+ /* Initialize BBT config from nand_chip info */
+ this->bbt.options = chip->bbt_options;
+ this->bbt.td = chip->bbt_td;
+ this->bbt.md = chip->bbt_md;
+ this->bbt.bbp = chip->badblock_pattern;
+
+ if (!this->bbt.bbp) {
+ ret = nand_create_badblock_pattern(chip);
+ if (ret)
+ return ret;
+ }
+
+ return nand_scan_bbt(this);
+}
+
/* Set default functions */
static void nand_set_defaults(struct nand_chip *chip)
{
@@ -4950,14 +5021,17 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
*/
void nand_cleanup(struct nand_chip *chip)
{
+ struct nand_device *nand = &chip->base.base;
+
if (chip->ecc.mode == NAND_ECC_SOFT &&
chip->ecc.algo == NAND_ECC_BCH)
nand_bch_free((struct nand_bch_control *)chip->ecc.priv);
nand_release_data_interface(chip);
- /* Free bad block table memory */
- kfree(chip->bbt);
+ if (nand_bbt_is_initialized(nand))
+ nand_release_bbt(nand);
+
if (!(chip->options & NAND_OWN_BUFFERS) && chip->buffers) {
kfree(chip->buffers->databuf);
kfree(chip->buffers->ecccode);
@@ -61,35 +61,28 @@
#include <linux/types.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/bbm.h>
-#include <linux/mtd/rawnand.h>
+#include <linux/mtd/nand.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/vmalloc.h>
#include <linux/export.h>
#include <linux/string.h>
-#define BBT_BLOCK_GOOD 0x00
-#define BBT_BLOCK_WORN 0x01
-#define BBT_BLOCK_RESERVED 0x02
-#define BBT_BLOCK_FACTORY_BAD 0x03
-
#define BBT_ENTRY_MASK 0x03
#define BBT_ENTRY_SHIFT 2
-static int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
-
-static inline uint8_t bbt_get_entry(struct nand_chip *chip, int block)
+static inline u8 bbt_get_entry(struct nand_device *chip, int block)
{
- uint8_t entry = chip->bbt[block >> BBT_ENTRY_SHIFT];
+ u8 entry = chip->bbt.bbt[block >> BBT_ENTRY_SHIFT];
entry >>= (block & BBT_ENTRY_MASK) * 2;
return entry & BBT_ENTRY_MASK;
}
-static inline void bbt_mark_entry(struct nand_chip *chip, int block,
- uint8_t mark)
+static inline void bbt_mark_entry(struct nand_device *chip, int block,
+ u8 mark)
{
uint8_t msk = (mark & BBT_ENTRY_MASK) << ((block & BBT_ENTRY_MASK) * 2);
- chip->bbt[block >> BBT_ENTRY_SHIFT] |= msk;
+ chip->bbt.bbt[block >> BBT_ENTRY_SHIFT] |= msk;
}
static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td)
@@ -100,6 +93,23 @@ static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td)
}
/**
+ * nand_bbt_update_entry - Update an entry in the in-memory bad block table
+ * @this: NAND device
+ * @eraseblock: eraseblock entry to update
+ * @status: new status for this eraseblock
+ *
+ * Update the eraseblock status in the in-memory BBT.
+ * This function should not be used unless your controller wants to manually
+ * initialize the BBT.
+ */
+void nand_bbt_update_entry(struct nand_device *this, int eraseblock,
+ enum nand_bbt_block_status status)
+{
+ bbt_mark_entry(this, eraseblock, status);
+}
+EXPORT_SYMBOL_GPL(nand_bbt_update_entry);
+
+/**
* check_pattern - [GENERIC] check if a pattern is in the buffer
* @buf: the buffer to search
* @len: the length of buffer to search
@@ -159,7 +169,7 @@ static u32 add_marker_len(struct nand_bbt_descr *td)
/**
* read_bbt - [GENERIC] Read the bad block table starting from page
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @page: the starting page
* @num: the number of bbt descriptors to read
@@ -168,11 +178,11 @@ static u32 add_marker_len(struct nand_bbt_descr *td)
*
* Read the bad block table starting from page.
*/
-static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
- struct nand_bbt_descr *td, int offs)
+static int read_bbt(struct nand_device *this, uint8_t *buf, int page, int num,
+ struct nand_bbt_descr *td, int offs)
{
+ struct mtd_info *mtd = nand_to_mtd(this);
int res, ret = 0, i, j, act = 0;
- struct nand_chip *this = mtd_to_nandchip(mtd);
size_t retlen, len, totlen;
loff_t from;
int bits = td->options & NAND_BBT_NRBITS_MSK;
@@ -182,10 +192,10 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
totlen = (num * bits) >> 3;
marker_len = add_marker_len(td);
- from = ((loff_t)page) << this->page_shift;
+ from = nand_page_to_offs(this, page);
while (totlen) {
- len = min(totlen, (size_t)(1 << this->bbt_erase_shift));
+ len = min(totlen, nand_eraseblock_size(this));
if (marker_len) {
/*
* In case the BBT marker is not in the OOB area it
@@ -199,11 +209,11 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
if (res < 0) {
if (mtd_is_eccerr(res)) {
pr_info("nand_bbt: ECC error in BBT at 0x%012llx\n",
- from & ~mtd->writesize);
+ from & ~nand_page_size(this));
return res;
} else if (mtd_is_bitflip(res)) {
pr_info("nand_bbt: corrected error in BBT at 0x%012llx\n",
- from & ~mtd->writesize);
+ from & ~nand_page_size(this));
ret = res;
} else {
pr_info("nand_bbt: error reading BBT\n");
@@ -220,10 +230,10 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
continue;
if (reserved_block_code && (tmp == reserved_block_code)) {
pr_info("nand_read_bbt: reserved block at 0x%012llx\n",
- (loff_t)(offs + act) <<
- this->bbt_erase_shift);
+ nand_eraseblock_to_offs(this,
+ offs + act));
bbt_mark_entry(this, offs + act,
- BBT_BLOCK_RESERVED);
+ NAND_BBT_BLOCK_RESERVED);
mtd->ecc_stats.bbtblocks++;
continue;
}
@@ -232,15 +242,15 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
* move this message to pr_debug.
*/
pr_info("nand_read_bbt: bad block at 0x%012llx\n",
- (loff_t)(offs + act) <<
- this->bbt_erase_shift);
+ nand_eraseblock_to_offs(this,
+ offs + act));
/* Factory marked bad or worn out? */
if (tmp == 0)
bbt_mark_entry(this, offs + act,
- BBT_BLOCK_FACTORY_BAD);
+ NAND_BBT_BLOCK_FACTORY_BAD);
else
bbt_mark_entry(this, offs + act,
- BBT_BLOCK_WORN);
+ NAND_BBT_BLOCK_WORN);
mtd->ecc_stats.badblocks++;
}
}
@@ -252,7 +262,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
/**
* read_abs_bbt - [GENERIC] Read the bad block table starting at a given page
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @chip: read the table for a specific chip, -1 read all chips; applies only if
@@ -261,25 +271,27 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
* Read the bad block table for all chips starting at a given page. We assume
* that the bbt bits are in consecutive order.
*/
-static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)
+static int read_abs_bbt(struct nand_device *this, uint8_t *buf,
+ struct nand_bbt_descr *td, int chip)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
+ int ndies = nand_ndies(this);
int res = 0, i;
if (td->options & NAND_BBT_PERCHIP) {
- int offs = 0;
- for (i = 0; i < this->numchips; i++) {
+ int offs = 0, nbbd = nand_eraseblocks_per_die(this);
+
+ for (i = 0; i < ndies; i++) {
if (chip == -1 || chip == i)
- res = read_bbt(mtd, buf, td->pages[i],
- this->chipsize >> this->bbt_erase_shift,
- td, offs);
+ res = read_bbt(this, buf, td->pages[i], nbbd,
+ td, offs);
if (res)
return res;
- offs += this->chipsize >> this->bbt_erase_shift;
+
+ offs += nbbd;
}
} else {
- res = read_bbt(mtd, buf, td->pages[0],
- mtd->size >> this->bbt_erase_shift, td, 0);
+ res = read_bbt(this, buf, td->pages[0],
+ nand_neraseblocks(this), td, 0);
if (res)
return res;
}
@@ -287,9 +299,10 @@ static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
}
/* BBT marker is in the first page, no OOB */
-static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
- struct nand_bbt_descr *td)
+static int scan_read_data(struct nand_device *this, uint8_t *buf, loff_t offs,
+ struct nand_bbt_descr *td)
{
+ struct mtd_info *mtd = nand_to_mtd(this);
size_t retlen;
size_t len;
@@ -302,7 +315,7 @@ static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
/**
* scan_read_oob - [GENERIC] Scan data+OOB region to buffer
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @offs: offset at which to scan
* @len: length of data region to read
@@ -311,19 +324,20 @@ static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
* page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest"
* ECC condition (error or bitflip). May quit on the first (non-ECC) error.
*/
-static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+static int scan_read_oob(struct nand_device *this, uint8_t *buf, loff_t offs,
size_t len)
{
+ struct mtd_info *mtd = nand_to_mtd(this);
struct mtd_oob_ops ops;
int res, ret = 0;
ops.mode = MTD_OPS_PLACE_OOB;
ops.ooboffs = 0;
- ops.ooblen = mtd->oobsize;
+ ops.ooblen = nand_per_page_oobsize(this);
while (len > 0) {
ops.datbuf = buf;
- ops.len = min(len, (size_t)mtd->writesize);
+ ops.len = min(len, nand_page_size(this));
ops.oobbuf = buf + ops.len;
res = mtd_read_oob(mtd, offs, &ops);
@@ -334,31 +348,32 @@ static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
ret = res;
}
- buf += mtd->oobsize + mtd->writesize;
- len -= mtd->writesize;
- offs += mtd->writesize;
+ buf += nand_per_page_oobsize(this) + nand_page_size(this);
+ len -= nand_page_size(this);
+ offs += nand_page_size(this);
}
return ret;
}
-static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
- size_t len, struct nand_bbt_descr *td)
+static int scan_read(struct nand_device *this, uint8_t *buf, loff_t offs,
+ size_t len, struct nand_bbt_descr *td)
{
if (td->options & NAND_BBT_NO_OOB)
- return scan_read_data(mtd, buf, offs, td);
+ return scan_read_data(this, buf, offs, td);
else
- return scan_read_oob(mtd, buf, offs, len);
+ return scan_read_oob(this, buf, offs, len);
}
/* Scan write data with oob to flash */
-static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
+static int scan_write_bbt(struct nand_device *this, loff_t offs, size_t len,
uint8_t *buf, uint8_t *oob)
{
+ struct mtd_info *mtd = nand_to_mtd(this);
struct mtd_oob_ops ops;
ops.mode = MTD_OPS_PLACE_OOB;
ops.ooboffs = 0;
- ops.ooblen = mtd->oobsize;
+ ops.ooblen = nand_per_page_oobsize(this);
ops.datbuf = buf;
ops.oobbuf = oob;
ops.len = len;
@@ -366,18 +381,19 @@ static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
return mtd_write_oob(mtd, offs, &ops);
}
-static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)
+static u32 bbt_get_ver_offs(struct nand_device *this,
+ struct nand_bbt_descr *td)
{
u32 ver_offs = td->veroffs;
if (!(td->options & NAND_BBT_NO_OOB))
- ver_offs += mtd->writesize;
+ ver_offs += nand_page_size(this);
return ver_offs;
}
/**
* read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @md: descriptor for the bad block table mirror
@@ -385,38 +401,37 @@ static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)
* Read the bad block table(s) for all chips starting at a given page. We
* assume that the bbt bits are in consecutive order.
*/
-static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,
+static void read_abs_bbts(struct nand_device *this, uint8_t *buf,
struct nand_bbt_descr *td, struct nand_bbt_descr *md)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
-
/* Read the primary version, if available */
if (td->options & NAND_BBT_VERSION) {
- scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift,
- mtd->writesize, td);
- td->version[0] = buf[bbt_get_ver_offs(mtd, td)];
+ scan_read(this, buf, nand_page_to_offs(this, td->pages[0]),
+ nand_page_size(this), td);
+ td->version[0] = buf[bbt_get_ver_offs(this, td)];
pr_info("Bad block table at page %d, version 0x%02X\n",
td->pages[0], td->version[0]);
}
/* Read the mirror version, if available */
if (md && (md->options & NAND_BBT_VERSION)) {
- scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift,
- mtd->writesize, md);
- md->version[0] = buf[bbt_get_ver_offs(mtd, md)];
+ scan_read(this, buf, nand_page_to_offs(this, td->pages[0]),
+ nand_page_size(this), md);
+ md->version[0] = buf[bbt_get_ver_offs(this, md)];
pr_info("Bad block table at page %d, version 0x%02X\n",
md->pages[0], md->version[0]);
}
}
/* Scan a given block partially */
-static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
+static int scan_block_fast(struct nand_device *this, struct nand_bbt_descr *bd,
loff_t offs, uint8_t *buf, int numpages)
{
+ struct mtd_info *mtd = nand_to_mtd(this);
struct mtd_oob_ops ops;
int j, ret;
- ops.ooblen = mtd->oobsize;
+ ops.ooblen = nand_per_page_oobsize(this);
ops.oobbuf = buf;
ops.ooboffs = 0;
ops.datbuf = NULL;
@@ -435,14 +450,14 @@ static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
if (check_short_pattern(buf, bd))
return 1;
- offs += mtd->writesize;
+ offs += nand_page_size(this);
}
return 0;
}
/**
* create_bbt - [GENERIC] Create a bad block table by scanning the device
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @bd: descriptor for the good/bad block search pattern
* @chip: create the table for a specific chip, -1 read all chips; applies only
@@ -451,10 +466,10 @@ static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
* Create a bad block table by scanning the device for the given good/bad block
* identify pattern.
*/
-static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
- struct nand_bbt_descr *bd, int chip)
+static int create_bbt(struct nand_device *this, uint8_t *buf,
+ struct nand_bbt_descr *bd, int chip)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
+ struct mtd_info *mtd = nand_to_mtd(this);
int i, numblocks, numpages;
int startblock;
loff_t from;
@@ -467,48 +482,49 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
numpages = 1;
if (chip == -1) {
- numblocks = mtd->size >> this->bbt_erase_shift;
+ numblocks = nand_neraseblocks(this);
startblock = 0;
from = 0;
} else {
- if (chip >= this->numchips) {
+ if (chip >= nand_ndies(this)) {
pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n",
- chip + 1, this->numchips);
+ chip + 1, nand_ndies(this));
return -EINVAL;
}
- numblocks = this->chipsize >> this->bbt_erase_shift;
+ numblocks = nand_eraseblocks_per_die(this);
startblock = chip * numblocks;
numblocks += startblock;
- from = (loff_t)startblock << this->bbt_erase_shift;
+ from = nand_eraseblock_to_offs(this, startblock);
}
- if (this->bbt_options & NAND_BBT_SCANLASTPAGE)
- from += mtd->erasesize - (mtd->writesize * numpages);
+ if (this->bbt.options & NAND_BBT_SCANLASTPAGE)
+ from += nand_eraseblock_size(this) -
+ (nand_page_size(this) * numpages);
for (i = startblock; i < numblocks; i++) {
int ret;
BUG_ON(bd->options & NAND_BBT_NO_OOB);
- ret = scan_block_fast(mtd, bd, from, buf, numpages);
+ ret = scan_block_fast(this, bd, from, buf, numpages);
if (ret < 0)
return ret;
if (ret) {
- bbt_mark_entry(this, i, BBT_BLOCK_FACTORY_BAD);
+ bbt_mark_entry(this, i, NAND_BBT_BLOCK_FACTORY_BAD);
pr_warn("Bad eraseblock %d at 0x%012llx\n",
i, (unsigned long long)from);
mtd->ecc_stats.badblocks++;
}
- from += (1 << this->bbt_erase_shift);
+ from += nand_eraseblock_size(this);
}
return 0;
}
/**
* search_bbt - [GENERIC] scan the device for a specific bad block table
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @td: descriptor for the bad block table
*
@@ -521,18 +537,17 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
*
* The bbt ident pattern resides in the oob area of the first page in a block.
*/
-static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
+static int search_bbt(struct nand_device *this, uint8_t *buf,
+ struct nand_bbt_descr *td)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int i, chips;
int startblock, block, dir;
- int scanlen = mtd->writesize + mtd->oobsize;
+ int scanlen = nand_page_size(this) + nand_per_page_oobsize(this);
int bbtblocks;
- int blocktopage = this->bbt_erase_shift - this->page_shift;
/* Search direction top -> down? */
if (td->options & NAND_BBT_LASTBLOCK) {
- startblock = (mtd->size >> this->bbt_erase_shift) - 1;
+ startblock = nand_neraseblocks(this) - 1;
dir = -1;
} else {
startblock = 0;
@@ -541,12 +556,12 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP) {
- chips = this->numchips;
- bbtblocks = this->chipsize >> this->bbt_erase_shift;
+ chips = nand_ndies(this);
+ bbtblocks = nand_eraseblocks_per_die(this);
startblock &= bbtblocks - 1;
} else {
chips = 1;
- bbtblocks = mtd->size >> this->bbt_erase_shift;
+ bbtblocks = nand_neraseblocks(this);
}
for (i = 0; i < chips; i++) {
@@ -557,20 +572,22 @@ 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 = (loff_t)actblock << this->bbt_erase_shift;
+ loff_t offs = nand_eraseblock_to_offs(this, actblock);
/* Read first page */
- scan_read(mtd, buf, offs, mtd->writesize, td);
- if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
- td->pages[i] = actblock << blocktopage;
+ scan_read(this, buf, offs, nand_page_size(this), td);
+ if (!check_pattern(buf, scanlen,
+ nand_page_size(this), td)) {
+ td->pages[i] = nand_eraseblock_to_page(this,
+ actblock);
if (td->options & NAND_BBT_VERSION) {
- offs = bbt_get_ver_offs(mtd, td);
+ offs = bbt_get_ver_offs(this, td);
td->version[i] = buf[offs];
}
break;
}
}
- startblock += this->chipsize >> this->bbt_erase_shift;
+ startblock += nand_eraseblocks_per_die(this);
}
/* Check, if we found a bbt for each requested chip */
for (i = 0; i < chips; i++) {
@@ -585,23 +602,23 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
/**
* search_read_bbts - [GENERIC] scan the device for bad block table(s)
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @md: descriptor for the bad block table mirror
*
* Search and read the bad block table(s).
*/
-static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf,
+static void search_read_bbts(struct nand_device *this, uint8_t *buf,
struct nand_bbt_descr *td,
struct nand_bbt_descr *md)
{
/* Search the primary table */
- search_bbt(mtd, buf, td);
+ search_bbt(this, buf, td);
/* Search the mirror table */
if (md)
- search_bbt(mtd, buf, md);
+ search_bbt(this, buf, md);
}
/**
@@ -617,7 +634,7 @@ static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf,
* pointing to a valid block we re-use it, otherwise we search for the next
* valid one.
*/
-static int get_bbt_block(struct nand_chip *this, struct nand_bbt_descr *td,
+static int get_bbt_block(struct nand_device *this, struct nand_bbt_descr *td,
struct nand_bbt_descr *md, int chip)
{
int startblock, dir, page, numblocks, i;
@@ -628,12 +645,11 @@ static int get_bbt_block(struct nand_chip *this, struct nand_bbt_descr *td,
* td->pages.
*/
if (td->pages[chip] != -1)
- return td->pages[chip] >>
- (this->bbt_erase_shift - this->page_shift);
+ return nand_page_to_eraseblock(this, td->pages[chip]);
- numblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ numblocks = nand_eraseblocks_per_die(this);
if (!(td->options & NAND_BBT_PERCHIP))
- numblocks *= this->numchips;
+ numblocks *= nand_ndies(this);
/*
* Automatic placement of the bad block table. Search direction
@@ -652,12 +668,12 @@ static int get_bbt_block(struct nand_chip *this, struct nand_bbt_descr *td,
/* Check, if the block is bad */
switch (bbt_get_entry(this, block)) {
- case BBT_BLOCK_WORN:
- case BBT_BLOCK_FACTORY_BAD:
+ case NAND_BBT_BLOCK_WORN:
+ case NAND_BBT_BLOCK_FACTORY_BAD:
continue;
}
- page = block << (this->bbt_erase_shift - this->page_shift);
+ page = nand_eraseblock_to_page(this, block);
/* Check, if the block is used by the mirror table */
if (!md || md->pages[chip] != page)
@@ -679,18 +695,15 @@ static int get_bbt_block(struct nand_chip *this, struct nand_bbt_descr *td,
* block as bad using a bad block marker and invalidating the associated
* td->pages[] entry.
*/
-static void mark_bbt_block_bad(struct nand_chip *this,
+static void mark_bbt_block_bad(struct nand_device *this,
struct nand_bbt_descr *td,
int chip, int block)
{
- struct mtd_info *mtd = nandchip_to_mtd(this);
- loff_t to;
int res;
- bbt_mark_entry(this, block, BBT_BLOCK_WORN);
+ bbt_mark_entry(this, block, NAND_BBT_BLOCK_WORN);
- to = (loff_t)block << this->bbt_erase_shift;
- res = this->block_markbad(mtd, to);
+ res = nand_markbad(this, block);
if (res)
pr_warn("nand_bbt: error %d while marking block %d bad\n",
res, block);
@@ -700,7 +713,7 @@ static void mark_bbt_block_bad(struct nand_chip *this,
/**
* write_bbt - [GENERIC] (Re)write the bad block table
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @md: descriptor for the bad block table mirror
@@ -708,11 +721,11 @@ static void mark_bbt_block_bad(struct nand_chip *this,
*
* (Re)write the bad block table.
*/
-static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
+static int write_bbt(struct nand_device *this, uint8_t *buf,
struct nand_bbt_descr *td, struct nand_bbt_descr *md,
int chipsel)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
+ struct mtd_info *mtd = nand_to_mtd(this);
struct erase_info einfo;
int i, res, chip = 0;
int bits, page, offs, numblocks, sft, sftmsk;
@@ -723,7 +736,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
loff_t to;
struct mtd_oob_ops ops;
- ops.ooblen = mtd->oobsize;
+ ops.ooblen = nand_per_page_oobsize(this);
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.mode = MTD_OPS_PLACE_OOB;
@@ -732,16 +745,16 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
rcode = 0xff;
/* Write bad block table per chip rather than per device? */
if (td->options & NAND_BBT_PERCHIP) {
- numblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ numblocks = nand_eraseblocks_per_die(this);
/* Full device write or specific chip? */
if (chipsel == -1) {
- nrchips = this->numchips;
+ nrchips = nand_ndies(this);
} else {
nrchips = chipsel + 1;
chip = chipsel;
}
} else {
- numblocks = (int)(mtd->size >> this->bbt_erase_shift);
+ numblocks = nand_neraseblocks(this);
nrchips = 1;
}
@@ -760,7 +773,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
* get_bbt_block() returns a block number, shift the value to
* get a page number.
*/
- page = block << (this->bbt_erase_shift - this->page_shift);
+ page = nand_eraseblock_to_page(this, block);
/* Set up shift count and masks for the flash table */
bits = td->options & NAND_BBT_NRBITS_MSK;
@@ -781,13 +794,14 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
default: return -EINVAL;
}
- to = ((loff_t)page) << this->page_shift;
+ to = nand_page_to_offs(this, page);
/* Must we save the block contents? */
if (td->options & NAND_BBT_SAVECONTENT) {
/* Make it block aligned */
- to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1);
- len = 1 << this->bbt_erase_shift;
+ to = nand_eraseblock_to_offs(this,
+ nand_page_to_eraseblock(this, page));
+ len = nand_eraseblock_size(this);
res = mtd_read(mtd, to, len, &retlen, buf);
if (res < 0) {
if (retlen != len) {
@@ -797,18 +811,21 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
pr_warn("nand_bbt: ECC error while reading block for writing bad block table\n");
}
/* Read oob data */
- ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
+ ops.ooblen = nand_len_to_pages(this, len) *
+ nand_per_page_oobsize(this);
ops.oobbuf = &buf[len];
- res = mtd_read_oob(mtd, to + mtd->writesize, &ops);
+ res = mtd_read_oob(mtd, to + nand_page_size(this),
+ &ops);
if (res < 0 || ops.oobretlen != ops.ooblen)
goto outerr;
/* Calc the byte offset in the buffer */
- pageoffs = page - (int)(to >> this->page_shift);
- offs = pageoffs << this->page_shift;
+ pageoffs = page - nand_offs_to_page(this, to);
+ offs = nand_page_to_offs(this, pageoffs);
/* Preset the bbt area with 0xff */
memset(&buf[offs], 0xff, (size_t)(numblocks >> sft));
- ooboffs = len + (pageoffs * mtd->oobsize);
+ ooboffs = len +
+ (pageoffs * nand_per_page_oobsize(this));
} else if (td->options & NAND_BBT_NO_OOB) {
ooboffs = 0;
@@ -820,7 +837,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
len = (size_t)(numblocks >> sft);
len += offs;
/* Make it page aligned! */
- len = ALIGN(len, mtd->writesize);
+ len = ALIGN(len, nand_page_size(this));
/* Preset the buffer with 0xff */
memset(buf, 0xff, len);
/* Pattern is located at the begin of first page */
@@ -829,10 +846,11 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
/* Calc length */
len = (size_t)(numblocks >> sft);
/* Make it page aligned! */
- len = ALIGN(len, mtd->writesize);
+ len = ALIGN(len, nand_page_size(this));
/* Preset the buffer with 0xff */
memset(buf, 0xff, len +
- (len >> this->page_shift)* mtd->oobsize);
+ (nand_len_to_pages(this, len) *
+ nand_per_page_oobsize(this)));
offs = 0;
ooboffs = len;
/* Pattern is located in oob area of first page */
@@ -854,8 +872,8 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
memset(&einfo, 0, sizeof(einfo));
einfo.mtd = mtd;
einfo.addr = to;
- einfo.len = 1 << this->bbt_erase_shift;
- res = nand_erase_nand(mtd, &einfo, 1);
+ einfo.len = nand_eraseblock_size(this);
+ res = nand_erase(this, &einfo, 1);
if (res < 0) {
pr_warn("nand_bbt: error while erasing BBT block %d\n",
res);
@@ -863,9 +881,9 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
continue;
}
- res = scan_write_bbt(mtd, to, len, buf,
- td->options & NAND_BBT_NO_OOB ? NULL :
- &buf[len]);
+ res = scan_write_bbt(this, to, len, buf,
+ td->options & NAND_BBT_NO_OOB ? NULL :
+ &buf[len]);
if (res < 0) {
pr_warn("nand_bbt: error while writing BBT block %d\n",
res);
@@ -888,22 +906,31 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
/**
* nand_memory_bbt - [GENERIC] create a memory based bad block table
- * @mtd: MTD device structure
+ * @this: NAND device
* @bd: descriptor for the good/bad block search pattern
*
* The function creates a memory based bbt by scanning the device for
* manufacturer / software marked good / bad blocks.
*/
-static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+static inline int nand_memory_bbt(struct nand_device *this,
+ struct nand_bbt_descr *bd)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
+ void *buffer;
+ int ret;
+
+ buffer = kmalloc(nand_page_size(this), GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
- return create_bbt(mtd, this->buffers->databuf, bd, -1);
+ ret = create_bbt(this, buffer, bd, -1);
+ kfree(buffer);
+
+ return ret;
}
/**
* check_create - [GENERIC] create and write bbt(s) if necessary
- * @mtd: MTD device structure
+ * @this: NAND device
* @buf: temporary buffer
* @bd: descriptor for the good/bad block search pattern
*
@@ -912,17 +939,17 @@ static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *b
* for the chip/device. Update is necessary if one of the tables is missing or
* the version nr. of one table is less than the other.
*/
-static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)
+static int check_create(struct nand_device *this, uint8_t *buf,
+ struct nand_bbt_descr *bd)
{
int i, chips, writeops, create, chipsel, res, res2;
- struct nand_chip *this = mtd_to_nandchip(mtd);
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *td = this->bbt.td;
+ struct nand_bbt_descr *md = this->bbt.md;
struct nand_bbt_descr *rd, *rd2;
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP)
- chips = this->numchips;
+ chips = nand_ndies(this);
else
chips = 1;
@@ -971,8 +998,8 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
continue;
/* Create the table in memory by scanning the chip(s) */
- if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY))
- create_bbt(mtd, buf, bd, chipsel);
+ if (!(this->bbt.options & NAND_BBT_CREATE_EMPTY))
+ create_bbt(this, buf, bd, chipsel);
td->version[i] = 1;
if (md)
@@ -981,7 +1008,7 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
/* Read back first? */
if (rd) {
- res = read_abs_bbt(mtd, buf, rd, chipsel);
+ res = read_abs_bbt(this, buf, rd, chipsel);
if (mtd_is_eccerr(res)) {
/* Mark table as invalid */
rd->pages[i] = -1;
@@ -992,7 +1019,7 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
}
/* If they weren't versioned, read both */
if (rd2) {
- res2 = read_abs_bbt(mtd, buf, rd2, chipsel);
+ res2 = read_abs_bbt(this, buf, rd2, chipsel);
if (mtd_is_eccerr(res2)) {
/* Mark table as invalid */
rd2->pages[i] = -1;
@@ -1014,14 +1041,14 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
/* Write the bad block table to the device? */
if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, td, md, chipsel);
+ res = write_bbt(this, buf, td, md, chipsel);
if (res < 0)
return res;
}
/* Write the mirror bad block table to the device? */
if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, md, td, chipsel);
+ res = write_bbt(this, buf, md, td, chipsel);
if (res < 0)
return res;
}
@@ -1031,25 +1058,26 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
/**
* mark_bbt_regions - [GENERIC] mark the bad block table regions
- * @mtd: MTD device structure
+ * @this: NAND device
* @td: bad block table descriptor
*
* The bad block table regions are marked as "bad" to prevent accidental
* erasures / writes. The regions are identified by the mark 0x02.
*/
-static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
+static void mark_bbt_region(struct nand_device *this,
+ struct nand_bbt_descr *td)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int i, j, chips, block, nrblocks, update;
uint8_t oldval;
+ loff_t offs;
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP) {
- chips = this->numchips;
- nrblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ chips = nand_ndies(this);
+ nrblocks = nand_eraseblocks_per_die(this);
} else {
chips = 1;
- nrblocks = (int)(mtd->size >> this->bbt_erase_shift);
+ nrblocks = nand_neraseblocks(this);
}
for (i = 0; i < chips; i++) {
@@ -1057,13 +1085,14 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
!(td->options & NAND_BBT_WRITE)) {
if (td->pages[i] == -1)
continue;
- block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift);
+ block = nand_page_to_eraseblock(this, td->pages[i]);
oldval = bbt_get_entry(this, block);
- bbt_mark_entry(this, block, BBT_BLOCK_RESERVED);
- if ((oldval != BBT_BLOCK_RESERVED) &&
- td->reserved_block_code)
- nand_update_bbt(mtd, (loff_t)block <<
- this->bbt_erase_shift);
+ bbt_mark_entry(this, block, NAND_BBT_BLOCK_RESERVED);
+ if ((oldval != NAND_BBT_BLOCK_RESERVED) &&
+ td->reserved_block_code) {
+ offs = nand_eraseblock_to_offs(this, block);
+ nand_update_bbt(this, offs);
+ }
continue;
}
update = 0;
@@ -1073,8 +1102,8 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
block = i * nrblocks;
for (j = 0; j < td->maxblocks; j++) {
oldval = bbt_get_entry(this, block);
- bbt_mark_entry(this, block, BBT_BLOCK_RESERVED);
- if (oldval != BBT_BLOCK_RESERVED)
+ bbt_mark_entry(this, block, NAND_BBT_BLOCK_RESERVED);
+ if (oldval != NAND_BBT_BLOCK_RESERVED)
update = 1;
block++;
}
@@ -1083,23 +1112,24 @@ 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, (loff_t)(block - 1) <<
- this->bbt_erase_shift);
+ if (update && td->reserved_block_code) {
+ offs = nand_eraseblock_to_offs(this, block - 1);
+ nand_update_bbt(this, offs);
+ }
}
}
/**
* verify_bbt_descr - verify the bad block description
- * @mtd: MTD device structure
+ * @this: NAND device
* @bd: the table to verify
*
* This functions performs a few sanity checks on the bad block description
* table.
*/
-static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+static void verify_bbt_descr(struct nand_device *this,
+ struct nand_bbt_descr *bd)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
u32 pattern_len;
u32 bits;
u32 table_size;
@@ -1110,16 +1140,16 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
pattern_len = bd->len;
bits = bd->options & NAND_BBT_NRBITS_MSK;
- BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) &&
- !(this->bbt_options & NAND_BBT_USE_FLASH));
+ BUG_ON((this->bbt.options & NAND_BBT_NO_OOB) &&
+ !(this->bbt.options & NAND_BBT_USE_FLASH));
BUG_ON(!bits);
if (bd->options & NAND_BBT_VERSION)
pattern_len++;
if (bd->options & NAND_BBT_NO_OOB) {
- BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH));
- BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB));
+ BUG_ON(!(this->bbt.options & NAND_BBT_USE_FLASH));
+ BUG_ON(!(this->bbt.options & NAND_BBT_NO_OOB));
BUG_ON(bd->offs);
if (bd->options & NAND_BBT_VERSION)
BUG_ON(bd->veroffs != bd->len);
@@ -1127,19 +1157,63 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
}
if (bd->options & NAND_BBT_PERCHIP)
- table_size = this->chipsize >> this->bbt_erase_shift;
+ table_size = nand_eraseblocks_per_die(this);
else
- table_size = mtd->size >> this->bbt_erase_shift;
+ table_size = nand_neraseblocks(this);
table_size >>= 3;
table_size *= bits;
if (bd->options & NAND_BBT_NO_OOB)
table_size += pattern_len;
- BUG_ON(table_size > (1 << this->bbt_erase_shift));
+ BUG_ON(table_size > nand_eraseblock_size(this));
}
+/* Generic flash bbt descriptors */
+static u8 bbt_pattern[] = {'B', 'b', 't', '0' };
+static u8 mirror_pattern[] = {'1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 8,
+ .len = 4,
+ .veroffs = 12,
+ .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
+ .pattern = bbt_pattern
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 8,
+ .len = 4,
+ .veroffs = 12,
+ .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
+ .pattern = mirror_pattern
+};
+
+static struct nand_bbt_descr bbt_main_no_oob_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP
+ | NAND_BBT_NO_OOB,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
+ .pattern = bbt_pattern
+};
+
+static struct nand_bbt_descr bbt_mirror_no_oob_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP
+ | NAND_BBT_NO_OOB,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
+ .pattern = mirror_pattern
+};
+
/**
* nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s)
- * @mtd: MTD device structure
+ * @this: NAND device
* @bd: descriptor for the good/bad block search pattern
*
* The function checks, if a bad block table(s) is/are already available. If
@@ -1149,21 +1223,40 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
* The bad block table memory is allocated here. It must be freed by calling
* the nand_free_bbt function.
*/
-static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+int nand_scan_bbt(struct nand_device *this)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int len, res;
uint8_t *buf;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *td, *md, *bd;
+
+ /* Is a flash based bad block table requested? */
+ if (this->bbt.options & NAND_BBT_USE_FLASH) {
+ /* Use the default pattern descriptors */
+ if (!this->bbt.td) {
+ if (this->bbt.options & NAND_BBT_NO_OOB) {
+ this->bbt.td = &bbt_main_no_oob_descr;
+ this->bbt.md = &bbt_mirror_no_oob_descr;
+ } else {
+ this->bbt.td = &bbt_main_descr;
+ this->bbt.md = &bbt_mirror_descr;
+ }
+ }
+ } else {
+ this->bbt.td = NULL;
+ this->bbt.md = NULL;
+ }
+
+ td = this->bbt.td;
+ md = this->bbt.md;
+ bd = this->bbt.bbp;
- len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1;
/*
* Allocate memory (2bit per block) and clear the memory bad block
* table.
*/
- this->bbt = kzalloc(len, GFP_KERNEL);
- if (!this->bbt)
+ len = DIV_ROUND_UP(nand_neraseblocks(this) * 2, 8);
+ this->bbt.bbt = kzalloc(len, GFP_KERNEL);
+ if (!this->bbt.bbt)
return -ENOMEM;
/*
@@ -1171,18 +1264,19 @@ static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
* memory based bad block table.
*/
if (!td) {
- if ((res = nand_memory_bbt(mtd, bd))) {
+ res = nand_memory_bbt(this, bd);
+ if (res) {
pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n");
goto err;
}
+
return 0;
}
- verify_bbt_descr(mtd, td);
- verify_bbt_descr(mtd, md);
+ verify_bbt_descr(this, td);
+ verify_bbt_descr(this, md);
/* Allocate a temporary buffer for one eraseblock incl. oob */
- len = (1 << this->bbt_erase_shift);
- len += (len >> this->page_shift) * mtd->oobsize;
+ len = nand_eraseblock_size(this) + nand_per_eraseblock_oobsize(this);
buf = vmalloc(len);
if (!buf) {
res = -ENOMEM;
@@ -1191,59 +1285,68 @@ static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
/* Is the bbt at a given page? */
if (td->options & NAND_BBT_ABSPAGE) {
- read_abs_bbts(mtd, buf, td, md);
+ read_abs_bbts(this, buf, td, md);
} else {
/* Search the bad block table using a pattern in oob */
- search_read_bbts(mtd, buf, td, md);
+ search_read_bbts(this, buf, td, md);
}
- res = check_create(mtd, buf, bd);
+ res = check_create(this, buf, bd);
if (res)
goto err;
/* Prevent the bbt regions from erasing / writing */
- mark_bbt_region(mtd, td);
+ mark_bbt_region(this, td);
if (md)
- mark_bbt_region(mtd, md);
+ mark_bbt_region(this, md);
vfree(buf);
return 0;
err:
- kfree(this->bbt);
- this->bbt = NULL;
+ kfree(this->bbt.bbt);
+ this->bbt.bbt = NULL;
return res;
}
/**
+ * nand_release_bbt - release bad block table(s)
+ * @this: NAND device
+ *
+ * The function releases the bad block table(s).
+ */
+void nand_release_bbt(struct nand_device *this)
+{
+ kfree(this->bbt.bbt);
+}
+
+/**
* nand_update_bbt - update bad block table(s)
- * @mtd: MTD device structure
+ * @this: NAND device
* @offs: the offset of the newly marked block
*
* The function updates the bad block table(s).
*/
-static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
+int nand_update_bbt(struct nand_device *this, loff_t offs)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int len, res = 0;
int chip, chipsel;
uint8_t *buf;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *td = this->bbt.td;
+ struct nand_bbt_descr *md = this->bbt.md;
- if (!this->bbt || !td)
+ if (!this->bbt.bbt || !td)
return -EINVAL;
/* Allocate a temporary buffer for one eraseblock incl. oob */
- len = (1 << this->bbt_erase_shift);
- len += (len >> this->page_shift) * mtd->oobsize;
+ len = nand_eraseblock_size(this) + nand_per_eraseblock_oobsize(this);
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP) {
- chip = (int)(offs >> this->chip_shift);
+ chip = nand_offs_to_die(this, offs);
chipsel = chip;
} else {
chip = 0;
@@ -1256,13 +1359,13 @@ static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
/* Write the bad block table to the device? */
if (td->options & NAND_BBT_WRITE) {
- res = write_bbt(mtd, buf, td, md, chipsel);
+ res = write_bbt(this, buf, td, md, chipsel);
if (res < 0)
goto out;
}
/* Write the mirror bad block table to the device? */
if (md && (md->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, md, td, chipsel);
+ res = write_bbt(this, buf, md, td, chipsel);
}
out:
@@ -1270,160 +1373,41 @@ static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
return res;
}
-/*
- * Define some generic bad / good block scan pattern which are used
- * while scanning a device for factory marked good / bad blocks.
- */
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
-
-/* Generic flash bbt descriptors */
-static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' };
-static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' };
-
-static struct nand_bbt_descr bbt_main_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
- .offs = 8,
- .len = 4,
- .veroffs = 12,
- .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
- .pattern = bbt_pattern
-};
-
-static struct nand_bbt_descr bbt_mirror_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
- .offs = 8,
- .len = 4,
- .veroffs = 12,
- .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
- .pattern = mirror_pattern
-};
-
-static struct nand_bbt_descr bbt_main_no_oob_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP
- | NAND_BBT_NO_OOB,
- .len = 4,
- .veroffs = 4,
- .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
- .pattern = bbt_pattern
-};
-
-static struct nand_bbt_descr bbt_mirror_no_oob_descr = {
- .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
- | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP
- | NAND_BBT_NO_OOB,
- .len = 4,
- .veroffs = 4,
- .maxblocks = NAND_BBT_SCAN_MAXBLOCKS,
- .pattern = mirror_pattern
-};
-
-#define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB)
-/**
- * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure
- * @this: NAND chip to create descriptor for
- *
- * This function allocates and initializes a nand_bbt_descr for BBM detection
- * based on the properties of @this. The new descriptor is stored in
- * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when
- * passed to this function.
- */
-static int nand_create_badblock_pattern(struct nand_chip *this)
-{
- struct nand_bbt_descr *bd;
- if (this->badblock_pattern) {
- pr_warn("Bad block pattern already allocated; not replacing\n");
- return -EINVAL;
- }
- bd = kzalloc(sizeof(*bd), GFP_KERNEL);
- if (!bd)
- return -ENOMEM;
- bd->options = this->bbt_options & BADBLOCK_SCAN_MASK;
- bd->offs = this->badblockpos;
- bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1;
- bd->pattern = scan_ff_pattern;
- bd->options |= NAND_BBT_DYNAMICSTRUCT;
- this->badblock_pattern = bd;
- return 0;
-}
-
-/**
- * nand_default_bbt - [NAND Interface] Select a default bad block table for the device
- * @mtd: MTD device structure
- *
- * This function selects the default bad block table support for the device and
- * calls the nand_scan_bbt function.
- */
-int nand_default_bbt(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd_to_nandchip(mtd);
- int ret;
-
- /* Is a flash based bad block table requested? */
- if (this->bbt_options & NAND_BBT_USE_FLASH) {
- /* Use the default pattern descriptors */
- if (!this->bbt_td) {
- if (this->bbt_options & NAND_BBT_NO_OOB) {
- this->bbt_td = &bbt_main_no_oob_descr;
- this->bbt_md = &bbt_mirror_no_oob_descr;
- } else {
- this->bbt_td = &bbt_main_descr;
- this->bbt_md = &bbt_mirror_descr;
- }
- }
- } else {
- this->bbt_td = NULL;
- this->bbt_md = NULL;
- }
-
- if (!this->badblock_pattern) {
- ret = nand_create_badblock_pattern(this);
- if (ret)
- return ret;
- }
-
- return nand_scan_bbt(mtd, this->badblock_pattern);
-}
-
/**
* nand_isreserved_bbt - [NAND Interface] Check if a block is reserved
- * @mtd: MTD device structure
+ * @this: NAND device
* @offs: offset in the device
*/
-int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs)
+int nand_isreserved_bbt(struct nand_device *this, loff_t offs)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int block;
- block = (int)(offs >> this->bbt_erase_shift);
- return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED;
+ block = nand_offs_to_eraseblock(this, offs);
+ return bbt_get_entry(this, block) == NAND_BBT_BLOCK_RESERVED;
}
/**
* nand_isbad_bbt - [NAND Interface] Check if a block is bad
- * @mtd: MTD device structure
+ * @this: NAND device
* @offs: offset in the device
* @allowbbt: allow access to bad block table region
*/
-int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
+int nand_isbad_bbt(struct nand_device *this, loff_t offs, int allowbbt)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int block, res;
- block = (int)(offs >> this->bbt_erase_shift);
+ block = nand_offs_to_eraseblock(this, offs);
res = bbt_get_entry(this, block);
pr_debug("nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
(unsigned int)offs, block, res);
switch (res) {
- case BBT_BLOCK_GOOD:
+ case NAND_BBT_BLOCK_GOOD:
return 0;
- case BBT_BLOCK_WORN:
+ case NAND_BBT_BLOCK_WORN:
return 1;
- case BBT_BLOCK_RESERVED:
+ case NAND_BBT_BLOCK_RESERVED:
return allowbbt ? 0 : 1;
}
return 1;
@@ -1431,22 +1415,21 @@ int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
/**
* nand_markbad_bbt - [NAND Interface] Mark a block bad in the BBT
- * @mtd: MTD device structure
+ * @this: NAND device
* @offs: offset of the bad block
*/
-int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs)
+int nand_markbad_bbt(struct nand_device *this, loff_t offs)
{
- struct nand_chip *this = mtd_to_nandchip(mtd);
int block, ret = 0;
- block = (int)(offs >> this->bbt_erase_shift);
+ block = nand_offs_to_eraseblock(this, offs);
/* Mark bad block in memory */
- bbt_mark_entry(this, block, BBT_BLOCK_WORN);
+ bbt_mark_entry(this, block, NAND_BBT_BLOCK_WORN);
/* Update flash-based bad block table */
- if (this->bbt_options & NAND_BBT_USE_FLASH)
- ret = nand_update_bbt(mtd, offs);
+ if (this->bbt.options & NAND_BBT_USE_FLASH)
+ ret = nand_update_bbt(this, offs);
return ret;
}
@@ -566,4 +566,27 @@ static inline struct device_node *nand_get_of_node(struct nand_device *nand)
{
return mtd_get_of_node(&nand->mtd);
}
+
+/* BBT related functions */
+enum nand_bbt_block_status {
+ NAND_BBT_BLOCK_GOOD,
+ NAND_BBT_BLOCK_WORN,
+ NAND_BBT_BLOCK_RESERVED,
+ NAND_BBT_BLOCK_FACTORY_BAD,
+};
+
+int nand_scan_bbt(struct nand_device *this);
+void nand_release_bbt(struct nand_device *this);
+int nand_update_bbt(struct nand_device *this, loff_t offs);
+int nand_isreserved_bbt(struct nand_device *this, loff_t offs);
+int nand_isbad_bbt(struct nand_device *this, loff_t offs, int allowbbt);
+int nand_markbad_bbt(struct nand_device *this, loff_t offs);
+
+void nand_bbt_update_entry(struct nand_device *this, int eraseblock,
+ enum nand_bbt_block_status status);
+static inline bool nand_bbt_is_initialized(struct nand_device *this)
+{
+ return !!this->bbt.bbt;
+}
+
#endif /* __LINUX_MTD_NAND_H */
@@ -831,7 +831,6 @@ struct rawnand_device {
* @onfi_set_features: [REPLACEABLE] set the features for ONFI nand
* @onfi_get_features: [REPLACEABLE] get the features for ONFI nand
* @setup_data_interface: [OPTIONAL] setup the data interface and timing
- * @bbt: [INTERN] bad block table pointer
* @bbt_td: [REPLACEABLE] bad block table descriptor for flash
* lookup.
* @bbt_md: [REPLACEABLE] bad block table mirror descriptor
@@ -924,7 +923,6 @@ struct nand_chip {
unsigned long buf_align;
struct nand_hw_control hwcontrol;
- uint8_t *bbt;
struct nand_bbt_descr *bbt_td;
struct nand_bbt_descr *bbt_md;
@@ -1114,10 +1112,6 @@ struct nand_manufacturer {
extern const struct nand_manufacturer_ops amd_nand_manuf_ops;
extern const struct nand_manufacturer_ops macronix_nand_manuf_ops;
-int nand_default_bbt(struct mtd_info *mtd);
-int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
-int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs);
-int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt);
int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
int allowbbt);
int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,