summaryrefslogtreecommitdiff
path: root/drivers/mtd/nand/raw/nand_base.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/nand/raw/nand_base.c')
-rw-r--r--drivers/mtd/nand/raw/nand_base.c71
1 files changed, 58 insertions, 13 deletions
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index f64e3b6605c6..c24e5e2ba130 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -683,7 +683,12 @@ int nand_soft_waitrdy(struct nand_chip *chip, unsigned long timeout_ms)
if (ret)
return ret;
- timeout_ms = jiffies + msecs_to_jiffies(timeout_ms);
+ /*
+ * +1 below is necessary because if we are now in the last fraction
+ * of jiffy and msecs_to_jiffies is 1 then we will wait only that
+ * small jiffy fraction - possibly leading to false timeout
+ */
+ timeout_ms = jiffies + msecs_to_jiffies(timeout_ms) + 1;
do {
ret = nand_read_data_op(chip, &status, sizeof(status), true);
if (ret)
@@ -4321,16 +4326,22 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
/**
* nand_suspend - [MTD Interface] Suspend the NAND flash
* @mtd: MTD device structure
+ *
+ * Returns 0 for success or negative error code otherwise.
*/
static int nand_suspend(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd_to_nand(mtd);
+ int ret = 0;
mutex_lock(&chip->lock);
- chip->suspended = 1;
+ if (chip->suspend)
+ ret = chip->suspend(chip);
+ if (!ret)
+ chip->suspended = 1;
mutex_unlock(&chip->lock);
- return 0;
+ return ret;
}
/**
@@ -4342,11 +4353,14 @@ static void nand_resume(struct mtd_info *mtd)
struct nand_chip *chip = mtd_to_nand(mtd);
mutex_lock(&chip->lock);
- if (chip->suspended)
+ if (chip->suspended) {
+ if (chip->resume)
+ chip->resume(chip);
chip->suspended = 0;
- else
+ } else {
pr_err("%s called for a chip which is not in suspended state\n",
__func__);
+ }
mutex_unlock(&chip->lock);
}
@@ -4360,6 +4374,38 @@ static void nand_shutdown(struct mtd_info *mtd)
nand_suspend(mtd);
}
+/**
+ * nand_lock - [MTD Interface] Lock the NAND flash
+ * @mtd: MTD device structure
+ * @ofs: offset byte address
+ * @len: number of bytes to lock (must be a multiple of block/page size)
+ */
+static int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+
+ if (!chip->lock_area)
+ return -ENOTSUPP;
+
+ return chip->lock_area(chip, ofs, len);
+}
+
+/**
+ * nand_unlock - [MTD Interface] Unlock the NAND flash
+ * @mtd: MTD device structure
+ * @ofs: offset byte address
+ * @len: number of bytes to unlock (must be a multiple of block/page size)
+ */
+static int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+
+ if (!chip->unlock_area)
+ return -ENOTSUPP;
+
+ return chip->unlock_area(chip, ofs, len);
+}
+
/* Set default functions */
static void nand_set_defaults(struct nand_chip *chip)
{
@@ -5591,8 +5637,7 @@ static int nand_scan_tail(struct nand_chip *chip)
}
if (!ecc->read_page)
ecc->read_page = nand_read_page_hwecc_oob_first;
- /* fall through */
-
+ fallthrough;
case NAND_ECC_HW:
/* Use standard hwecc read page function? */
if (!ecc->read_page)
@@ -5611,8 +5656,7 @@ static int nand_scan_tail(struct nand_chip *chip)
ecc->read_subpage = nand_read_subpage;
if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
ecc->write_subpage = nand_write_subpage_hwecc;
- /* fall through */
-
+ fallthrough;
case NAND_ECC_HW_SYNDROME:
if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
(!ecc->read_page ||
@@ -5649,8 +5693,7 @@ static int nand_scan_tail(struct nand_chip *chip)
ecc->size, mtd->writesize);
ecc->mode = NAND_ECC_SOFT;
ecc->algo = NAND_ECC_HAMMING;
- /* fall through */
-
+ fallthrough;
case NAND_ECC_SOFT:
ret = nand_set_ecc_soft_ops(chip);
if (ret) {
@@ -5786,8 +5829,8 @@ static int nand_scan_tail(struct nand_chip *chip)
mtd->_read_oob = nand_read_oob;
mtd->_write_oob = nand_write_oob;
mtd->_sync = nand_sync;
- mtd->_lock = NULL;
- mtd->_unlock = NULL;
+ mtd->_lock = nand_lock;
+ mtd->_unlock = nand_unlock;
mtd->_suspend = nand_suspend;
mtd->_resume = nand_resume;
mtd->_reboot = nand_shutdown;
@@ -5907,6 +5950,8 @@ void nand_cleanup(struct nand_chip *chip)
chip->ecc.algo == NAND_ECC_BCH)
nand_bch_free((struct nand_bch_control *)chip->ecc.priv);
+ nanddev_cleanup(&chip->base);
+
/* Free bad block table memory */
kfree(chip->bbt);
kfree(chip->data_buf);