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author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-05-16 00:17:42 +0200 |
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committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-08-03 17:30:40 +0200 |
commit | d4cb37e71662dac72049bf7c55a9038bd7d2bcb5 (patch) | |
tree | 99a252255f32d9997e961da3431a611bfd7cdaff /drivers/mtd/nand/nand_base.c | |
parent | 5771a8c08880cdca3bfb4a3fc6d309d6bba20877 (diff) | |
download | op-kernel-dev-d4cb37e71662dac72049bf7c55a9038bd7d2bcb5.zip op-kernel-dev-d4cb37e71662dac72049bf7c55a9038bd7d2bcb5.tar.gz |
mtd: nand: Remove support for block locking/unlocking
Commit 7d70f334ad2b ("mtd: nand: add lock/unlock routines") introduced
support for the Micron LOCK/UNLOCK commands but no one ever used the
nand_lock/unlock() functions.
Remove support for these vendor-specific operations from the core. If
one ever wants to add them back they should be put in nand_micron.c and
mtd->_lock/_unlock should be directly assigned from there instead of
exporting the functions.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
-rw-r--r-- | drivers/mtd/nand/nand_base.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 5fa5ddc..54d6194 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1240,179 +1240,6 @@ int nand_reset(struct nand_chip *chip, int chipnr) } /** - * __nand_unlock - [REPLACEABLE] unlocks specified locked blocks - * @mtd: mtd info - * @ofs: offset to start unlock from - * @len: length to unlock - * @invert: - * - when = 0, unlock the range of blocks within the lower and - * upper boundary address - * - when = 1, unlock the range of blocks outside the boundaries - * of the lower and upper boundary address - * - * Returs unlock status. - */ -static int __nand_unlock(struct mtd_info *mtd, loff_t ofs, - uint64_t len, int invert) -{ - int ret = 0; - int status, page; - struct nand_chip *chip = mtd_to_nand(mtd); - - /* Submit address of first page to unlock */ - page = ofs >> chip->page_shift; - chip->cmdfunc(mtd, NAND_CMD_UNLOCK1, -1, page & chip->pagemask); - - /* Submit address of last page to unlock */ - page = (ofs + len) >> chip->page_shift; - chip->cmdfunc(mtd, NAND_CMD_UNLOCK2, -1, - (page | invert) & chip->pagemask); - - /* Call wait ready function */ - status = chip->waitfunc(mtd, chip); - /* See if device thinks it succeeded */ - if (status & NAND_STATUS_FAIL) { - pr_debug("%s: error status = 0x%08x\n", - __func__, status); - ret = -EIO; - } - - return ret; -} - -/** - * nand_unlock - [REPLACEABLE] unlocks specified locked blocks - * @mtd: mtd info - * @ofs: offset to start unlock from - * @len: length to unlock - * - * Returns unlock status. - */ -int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) -{ - int ret = 0; - int chipnr; - struct nand_chip *chip = mtd_to_nand(mtd); - - pr_debug("%s: start = 0x%012llx, len = %llu\n", - __func__, (unsigned long long)ofs, len); - - if (check_offs_len(mtd, ofs, len)) - return -EINVAL; - - /* Align to last block address if size addresses end of the device */ - if (ofs + len == mtd->size) - len -= mtd->erasesize; - - nand_get_device(mtd, FL_UNLOCKING); - - /* Shift to get chip number */ - chipnr = ofs >> chip->chip_shift; - - /* - * Reset the chip. - * If we want to check the WP through READ STATUS and check the bit 7 - * we must reset the chip - * some operation can also clear the bit 7 of status register - * eg. erase/program a locked block - */ - nand_reset(chip, chipnr); - - chip->select_chip(mtd, chipnr); - - /* Check, if it is write protected */ - if (nand_check_wp(mtd)) { - pr_debug("%s: device is write protected!\n", - __func__); - ret = -EIO; - goto out; - } - - ret = __nand_unlock(mtd, ofs, len, 0); - -out: - chip->select_chip(mtd, -1); - nand_release_device(mtd); - - return ret; -} -EXPORT_SYMBOL(nand_unlock); - -/** - * nand_lock - [REPLACEABLE] locks all blocks present in the device - * @mtd: mtd info - * @ofs: offset to start unlock from - * @len: length to unlock - * - * This feature is not supported in many NAND parts. 'Micron' NAND parts do - * have this feature, but it allows only to lock all blocks, not for specified - * range for block. Implementing 'lock' feature by making use of 'unlock', for - * now. - * - * Returns lock status. - */ -int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) -{ - int ret = 0; - int chipnr, status, page; - struct nand_chip *chip = mtd_to_nand(mtd); - - pr_debug("%s: start = 0x%012llx, len = %llu\n", - __func__, (unsigned long long)ofs, len); - - if (check_offs_len(mtd, ofs, len)) - return -EINVAL; - - nand_get_device(mtd, FL_LOCKING); - - /* Shift to get chip number */ - chipnr = ofs >> chip->chip_shift; - - /* - * Reset the chip. - * If we want to check the WP through READ STATUS and check the bit 7 - * we must reset the chip - * some operation can also clear the bit 7 of status register - * eg. erase/program a locked block - */ - nand_reset(chip, chipnr); - - chip->select_chip(mtd, chipnr); - - /* Check, if it is write protected */ - if (nand_check_wp(mtd)) { - pr_debug("%s: device is write protected!\n", - __func__); - status = MTD_ERASE_FAILED; - ret = -EIO; - goto out; - } - - /* Submit address of first page to lock */ - page = ofs >> chip->page_shift; - chip->cmdfunc(mtd, NAND_CMD_LOCK, -1, page & chip->pagemask); - - /* Call wait ready function */ - status = chip->waitfunc(mtd, chip); - /* See if device thinks it succeeded */ - if (status & NAND_STATUS_FAIL) { - pr_debug("%s: error status = 0x%08x\n", - __func__, status); - ret = -EIO; - goto out; - } - - ret = __nand_unlock(mtd, ofs, len, 0x1); - -out: - chip->select_chip(mtd, -1); - nand_release_device(mtd); - - return ret; -} -EXPORT_SYMBOL(nand_lock); - -/** * nand_check_erased_buf - check if a buffer contains (almost) only 0xff data * @buf: buffer to test * @len: buffer length |