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path: root/drivers/mtd/nand/nand_base.c
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Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
-rw-r--r--drivers/mtd/nand/nand_base.c167
1 files changed, 115 insertions, 52 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 8c21b89d2d0..22113865438 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -688,8 +688,7 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
retry:
spin_lock(lock);
- /* Hardware controller shared among independend devices */
- /* Hardware controller shared among independend devices */
+ /* Hardware controller shared among independent devices */
if (!chip->controller->active)
chip->controller->active = chip;
@@ -766,7 +765,7 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
* Not for syndrome calculating ecc controllers, which use a special oob layout
*/
static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
+ uint8_t *buf, int page)
{
chip->read_buf(mtd, buf, mtd->writesize);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
@@ -782,7 +781,7 @@ static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
* We need a special oob layout and handling even when OOB isn't used.
*/
static int nand_read_page_raw_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
+ uint8_t *buf, int page)
{
int eccsize = chip->ecc.size;
int eccbytes = chip->ecc.bytes;
@@ -821,7 +820,7 @@ static int nand_read_page_raw_syndrome(struct mtd_info *mtd, struct nand_chip *c
* @buf: buffer to store read data
*/
static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
+ uint8_t *buf, int page)
{
int i, eccsize = chip->ecc.size;
int eccbytes = chip->ecc.bytes;
@@ -831,7 +830,7 @@ static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *ecc_code = chip->buffers->ecccode;
uint32_t *eccpos = chip->ecc.layout->eccpos;
- chip->ecc.read_page_raw(mtd, chip, buf);
+ chip->ecc.read_page_raw(mtd, chip, buf, page);
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
chip->ecc.calculate(mtd, p, &ecc_calc[i]);
@@ -944,7 +943,7 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, uint3
* Not for syndrome calculating ecc controllers which need a special oob layout
*/
static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
+ uint8_t *buf, int page)
{
int i, eccsize = chip->ecc.size;
int eccbytes = chip->ecc.bytes;
@@ -980,6 +979,54 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
}
/**
+ * nand_read_page_hwecc_oob_first - [REPLACABLE] hw ecc, read oob first
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @buf: buffer to store read data
+ *
+ * Hardware ECC for large page chips, require OOB to be read first.
+ * For this ECC mode, the write_page method is re-used from ECC_HW.
+ * These methods read/write ECC from the OOB area, unlike the
+ * ECC_HW_SYNDROME support with multiple ECC steps, follows the
+ * "infix ECC" scheme and reads/writes ECC from the data area, by
+ * overwriting the NAND manufacturer bad block markings.
+ */
+static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ uint8_t *ecc_code = chip->buffers->ecccode;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+ uint8_t *ecc_calc = chip->buffers->ecccalc;
+
+ /* Read the OOB area first */
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
+
+ for (i = 0; i < chip->ecc.total; i++)
+ ecc_code[i] = chip->oob_poi[eccpos[i]];
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ int stat;
+
+ chip->ecc.hwctl(mtd, NAND_ECC_READ);
+ chip->read_buf(mtd, p, eccsize);
+ chip->ecc.calculate(mtd, p, &ecc_calc[i]);
+
+ stat = chip->ecc.correct(mtd, p, &ecc_code[i], NULL);
+ if (stat < 0)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
+ }
+ return 0;
+}
+
+/**
* nand_read_page_syndrome - [REPLACABLE] hardware ecc syndrom based page read
* @mtd: mtd info structure
* @chip: nand chip info structure
@@ -989,7 +1036,7 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
* we need a special oob layout and handling.
*/
static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
- uint8_t *buf)
+ uint8_t *buf, int page)
{
int i, eccsize = chip->ecc.size;
int eccbytes = chip->ecc.bytes;
@@ -1131,11 +1178,13 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
/* Now read the page into the buffer */
if (unlikely(ops->mode == MTD_OOB_RAW))
- ret = chip->ecc.read_page_raw(mtd, chip, bufpoi);
+ ret = chip->ecc.read_page_raw(mtd, chip,
+ bufpoi, page);
else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob)
ret = chip->ecc.read_subpage(mtd, chip, col, bytes, bufpoi);
else
- ret = chip->ecc.read_page(mtd, chip, bufpoi);
+ ret = chip->ecc.read_page(mtd, chip, bufpoi,
+ page);
if (ret < 0)
break;
@@ -1413,8 +1462,8 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
int len;
uint8_t *buf = ops->oobbuf;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n",
- (unsigned long long)from, readlen);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08Lx, len = %i\n",
+ __func__, (unsigned long long)from, readlen);
if (ops->mode == MTD_OOB_AUTO)
len = chip->ecc.layout->oobavail;
@@ -1422,8 +1471,8 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
len = mtd->oobsize;
if (unlikely(ops->ooboffs >= len)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt to start read outside oob\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to start read "
+ "outside oob\n", __func__);
return -EINVAL;
}
@@ -1431,8 +1480,8 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
if (unlikely(from >= mtd->size ||
ops->ooboffs + readlen > ((mtd->size >> chip->page_shift) -
(from >> chip->page_shift)) * len)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt read beyond end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt read beyond end "
+ "of device\n", __func__);
return -EINVAL;
}
@@ -1506,8 +1555,8 @@ static int nand_read_oob(struct mtd_info *mtd, loff_t from,
/* Do not allow reads past end of device */
if (ops->datbuf && (from + ops->len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: "
- "Attempt read beyond end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt read "
+ "beyond end of device\n", __func__);
return -EINVAL;
}
@@ -1816,8 +1865,8 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
/* reject writes, which are not page aligned */
if (NOTALIGNED(to) || NOTALIGNED(ops->len)) {
- printk(KERN_NOTICE "nand_write: "
- "Attempt to write not page aligned data\n");
+ printk(KERN_NOTICE "%s: Attempt to write not "
+ "page aligned data\n", __func__);
return -EINVAL;
}
@@ -1944,8 +1993,8 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
int chipnr, page, status, len;
struct nand_chip *chip = mtd->priv;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n",
- (unsigned int)to, (int)ops->ooblen);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
+ __func__, (unsigned int)to, (int)ops->ooblen);
if (ops->mode == MTD_OOB_AUTO)
len = chip->ecc.layout->oobavail;
@@ -1954,14 +2003,14 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
/* Do not allow write past end of page */
if ((ops->ooboffs + ops->ooblen) > len) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
- "Attempt to write past end of page\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to write "
+ "past end of page\n", __func__);
return -EINVAL;
}
if (unlikely(ops->ooboffs >= len)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_do_write_oob: "
- "Attempt to start write outside oob\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to start "
+ "write outside oob\n", __func__);
return -EINVAL;
}
@@ -1970,8 +2019,8 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
ops->ooboffs + ops->ooblen >
((mtd->size >> chip->page_shift) -
(to >> chip->page_shift)) * len)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_do_write_oob: "
- "Attempt write beyond end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt write beyond "
+ "end of device\n", __func__);
return -EINVAL;
}
@@ -2026,8 +2075,8 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to,
/* Do not allow writes past end of device */
if (ops->datbuf && (to + ops->len) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
- "Attempt write beyond end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt write beyond "
+ "end of device\n", __func__);
return -EINVAL;
}
@@ -2117,26 +2166,27 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
unsigned int bbt_masked_page = 0xffffffff;
loff_t len;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%012llx, len = %llu\n",
- (unsigned long long)instr->addr, (unsigned long long)instr->len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: start = 0x%012llx, len = %llu\n",
+ __func__, (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)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Unaligned address\n", __func__);
return -EINVAL;
}
/* Length must align on block boundary */
if (instr->len & ((1 << chip->phys_erase_shift) - 1)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Length not block aligned\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Length not block aligned\n",
+ __func__);
return -EINVAL;
}
/* Do not allow erase past end of device */
if ((instr->len + instr->addr) > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Erase past end of device\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Erase past end of device\n",
+ __func__);
return -EINVAL;
}
@@ -2157,8 +2207,8 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
/* Check, if it is write protected */
if (nand_check_wp(mtd)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Device is write protected!!!\n");
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Device is write protected!!!\n",
+ __func__);
instr->state = MTD_ERASE_FAILED;
goto erase_exit;
}
@@ -2183,8 +2233,8 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
*/
if (nand_block_checkbad(mtd, ((loff_t) page) <<
chip->page_shift, 0, allowbbt)) {
- printk(KERN_WARNING "nand_erase: attempt to erase a "
- "bad block at page 0x%08x\n", page);
+ printk(KERN_WARNING "%s: attempt to erase a bad block "
+ "at page 0x%08x\n", __func__, page);
instr->state = MTD_ERASE_FAILED;
goto erase_exit;
}
@@ -2211,8 +2261,8 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
/* See if block erase succeeded */
if (status & NAND_STATUS_FAIL) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: "
- "Failed erase, page 0x%08x\n", page);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: Failed erase, "
+ "page 0x%08x\n", __func__, page);
instr->state = MTD_ERASE_FAILED;
instr->fail_addr =
((loff_t)page << chip->page_shift);
@@ -2272,9 +2322,9 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
if (!rewrite_bbt[chipnr])
continue;
/* update the BBT for chip */
- DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt "
- "(%d:0x%0llx 0x%0x)\n", chipnr, rewrite_bbt[chipnr],
- chip->bbt_td->pages[chipnr]);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: nand_update_bbt "
+ "(%d:0x%0llx 0x%0x)\n", __func__, chipnr,
+ rewrite_bbt[chipnr], chip->bbt_td->pages[chipnr]);
nand_update_bbt(mtd, rewrite_bbt[chipnr]);
}
@@ -2292,7 +2342,7 @@ static void nand_sync(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;
- DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n");
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: called\n", __func__);
/* Grab the lock and see if the device is available */
nand_get_device(chip, mtd, FL_SYNCING);
@@ -2356,8 +2406,8 @@ static void nand_resume(struct mtd_info *mtd)
if (chip->state == FL_PM_SUSPENDED)
nand_release_device(mtd);
else
- printk(KERN_ERR "nand_resume() called for a chip which is not "
- "in suspended state\n");
+ printk(KERN_ERR "%s called for a chip which is not "
+ "in suspended state\n", __func__);
}
/*
@@ -2671,6 +2721,17 @@ int nand_scan_tail(struct mtd_info *mtd)
*/
switch (chip->ecc.mode) {
+ case NAND_ECC_HW_OOB_FIRST:
+ /* Similar to NAND_ECC_HW, but a separate read_page handle */
+ if (!chip->ecc.calculate || !chip->ecc.correct ||
+ !chip->ecc.hwctl) {
+ printk(KERN_WARNING "No ECC functions supplied; "
+ "Hardware ECC not possible\n");
+ BUG();
+ }
+ if (!chip->ecc.read_page)
+ chip->ecc.read_page = nand_read_page_hwecc_oob_first;
+
case NAND_ECC_HW:
/* Use standard hwecc read page function ? */
if (!chip->ecc.read_page)
@@ -2693,7 +2754,7 @@ int nand_scan_tail(struct mtd_info *mtd)
chip->ecc.read_page == nand_read_page_hwecc ||
!chip->ecc.write_page ||
chip->ecc.write_page == nand_write_page_hwecc)) {
- printk(KERN_WARNING "No ECC functions supplied, "
+ printk(KERN_WARNING "No ECC functions supplied; "
"Hardware ECC not possible\n");
BUG();
}
@@ -2728,7 +2789,8 @@ int nand_scan_tail(struct mtd_info *mtd)
chip->ecc.write_page_raw = nand_write_page_raw;
chip->ecc.read_oob = nand_read_oob_std;
chip->ecc.write_oob = nand_write_oob_std;
- chip->ecc.size = 256;
+ if (!chip->ecc.size)
+ chip->ecc.size = 256;
chip->ecc.bytes = 3;
break;
@@ -2858,7 +2920,8 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
/* Many callers got this wrong, so check for it for a while... */
if (!mtd->owner && caller_is_module()) {
- printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n");
+ printk(KERN_CRIT "%s called with NULL mtd->owner!\n",
+ __func__);
BUG();
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-17 00:02:54 +0000