ret = -EINVAL;
}
- /* Do not allow past end of device */
- if (ofs + len > mtd->size) {
- pr_debug("%s: past end of device\n", __func__);
- ret = -EINVAL;
- }
-
return ret;
}
*/
static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
{
- int page, chipnr, res = 0;
+ int page, chipnr, res = 0, i = 0;
struct nand_chip *chip = mtd->priv;
u16 bad;
chip->select_chip(mtd, chipnr);
}
- if (chip->options & NAND_BUSWIDTH_16) {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE,
- page);
- bad = cpu_to_le16(chip->read_word(mtd));
- if (chip->badblockpos & 0x1)
- bad >>= 8;
- else
- bad &= 0xFF;
- } else {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page);
- bad = chip->read_byte(mtd);
- }
+ do {
+ if (chip->options & NAND_BUSWIDTH_16) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB,
+ chip->badblockpos & 0xFE, page);
+ bad = cpu_to_le16(chip->read_word(mtd));
+ if (chip->badblockpos & 0x1)
+ bad >>= 8;
+ else
+ bad &= 0xFF;
+ } else {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos,
+ page);
+ bad = chip->read_byte(mtd);
+ }
- if (likely(chip->badblockbits == 8))
- res = bad != 0xFF;
- else
- res = hweight8(bad) < chip->badblockbits;
+ if (likely(chip->badblockbits == 8))
+ res = bad != 0xFF;
+ else
+ res = hweight8(bad) < chip->badblockbits;
+ ofs += mtd->writesize;
+ page = (int)(ofs >> chip->page_shift) & chip->pagemask;
+ i++;
+ } while (!res && i < 2 && (chip->bbt_options & NAND_BBT_SCAN2NDPAGE));
if (getchip)
nand_release_device(mtd);
* @ofs: offset from device start
*
* This is the default implementation, which can be overridden by a hardware
- * specific driver.
+ * specific driver. We try operations in the following order, according to our
+ * bbt_options (NAND_BBT_NO_OOB_BBM and NAND_BBT_USE_FLASH):
+ * (1) erase the affected block, to allow OOB marker to be written cleanly
+ * (2) update in-memory BBT
+ * (3) write bad block marker to OOB area of affected block
+ * (4) update flash-based BBT
+ * Note that we retain the first error encountered in (3) or (4), finish the
+ * procedures, and dump the error in the end.
*/
static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct nand_chip *chip = mtd->priv;
uint8_t buf[2] = { 0, 0 };
- int block, ret, i = 0;
+ int block, res, ret = 0, i = 0;
+ int write_oob = !(chip->bbt_options & NAND_BBT_NO_OOB_BBM);
- if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
- ofs += mtd->erasesize - mtd->writesize;
+ if (write_oob) {
+ struct erase_info einfo;
+
+ /* Attempt erase before marking OOB */
+ memset(&einfo, 0, sizeof(einfo));
+ einfo.mtd = mtd;
+ einfo.addr = ofs;
+ einfo.len = 1 << chip->phys_erase_shift;
+ nand_erase_nand(mtd, &einfo, 0);
+ }
/* Get block number */
block = (int)(ofs >> chip->bbt_erase_shift);
+ /* Mark block bad in memory-based BBT */
if (chip->bbt)
chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
- /* Do we have a flash based bad block table? */
- if (chip->bbt_options & NAND_BBT_USE_FLASH)
- ret = nand_update_bbt(mtd, ofs);
- else {
+ /* Write bad block marker to OOB */
+ if (write_oob) {
struct mtd_oob_ops ops;
+ loff_t wr_ofs = ofs;
nand_get_device(chip, mtd, FL_WRITING);
- /*
- * Write to first two pages if necessary. If we write to more
- * than one location, the first error encountered quits the
- * procedure. We write two bytes per location, so we dont have
- * to mess with 16 bit access.
- */
- ops.len = ops.ooblen = 2;
ops.datbuf = NULL;
ops.oobbuf = buf;
- ops.ooboffs = chip->badblockpos & ~0x01;
+ ops.ooboffs = chip->badblockpos;
+ if (chip->options & NAND_BUSWIDTH_16) {
+ ops.ooboffs &= ~0x01;
+ ops.len = ops.ooblen = 2;
+ } else {
+ ops.len = ops.ooblen = 1;
+ }
ops.mode = MTD_OPS_PLACE_OOB;
+
+ /* Write to first/last page(s) if necessary */
+ if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+ wr_ofs += mtd->erasesize - mtd->writesize;
do {
- ret = nand_do_write_oob(mtd, ofs, &ops);
+ res = nand_do_write_oob(mtd, wr_ofs, &ops);
+ if (!ret)
+ ret = res;
i++;
- ofs += mtd->writesize;
- } while (!ret && (chip->bbt_options & NAND_BBT_SCAN2NDPAGE) &&
- i < 2);
+ wr_ofs += mtd->writesize;
+ } while ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2);
nand_release_device(mtd);
}
+
+ /* Update flash-based bad block table */
+ if (chip->bbt_options & NAND_BBT_USE_FLASH) {
+ res = nand_update_bbt(mtd, ofs);
+ if (!ret)
+ ret = res;
+ }
+
if (!ret)
mtd->ecc_stats.badblocks++;
struct mtd_oob_ops ops;
int ret;
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size)
- return -EINVAL;
- if (!len)
- return 0;
-
nand_get_device(chip, mtd, FL_READING);
-
ops.len = len;
ops.datbuf = buf;
ops.oobbuf = NULL;
ops.mode = 0;
-
ret = nand_do_read_ops(mtd, from, &ops);
-
*retlen = ops.retlen;
-
nand_release_device(mtd);
-
return ret;
}
struct mtd_oob_ops ops;
int ret;
- /* Do not allow reads past end of device */
- if ((to + len) > mtd->size)
- return -EINVAL;
- if (!len)
- return 0;
-
/* Wait for the device to get ready */
panic_nand_wait(mtd, chip, 400);
struct mtd_oob_ops ops;
int ret;
- /* Do not allow reads past end of device */
- if ((to + len) > mtd->size)
- return -EINVAL;
- if (!len)
- return 0;
-
nand_get_device(chip, mtd, FL_WRITING);
-
ops.len = len;
ops.datbuf = (uint8_t *)buf;
ops.oobbuf = NULL;
ops.mode = 0;
-
ret = nand_do_write_ops(mtd, to, &ops);
-
*retlen = ops.retlen;
-
nand_release_device(mtd);
-
return ret;
}
if (check_offs_len(mtd, instr->addr, instr->len))
return -EINVAL;
- instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
-
/* Grab the lock and see if the device is available */
nand_get_device(chip, mtd, FL_ERASING);
*/
static int nand_block_isbad(struct mtd_info *mtd, loff_t offs)
{
- /* Check for invalid offset */
- if (offs > mtd->size)
- return -EINVAL;
-
return nand_block_checkbad(mtd, offs, 1, 0);
}
chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I')
return 0;
- pr_info("ONFI flash detected\n");
chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1);
for (i = 0; i < 3; i++) {
chip->read_buf(mtd, (uint8_t *)p, sizeof(*p));
mtd->writesize = le32_to_cpu(p->byte_per_page);
mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
- chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize;
+ chip->chipsize = le32_to_cpu(p->blocks_per_lun);
+ chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
*busw = 0;
if (le16_to_cpu(p->features) & 1)
*busw = NAND_BUSWIDTH_16;
chip->options |= (NAND_NO_READRDY |
NAND_NO_AUTOINCR) & NAND_CHIPOPTIONS_MSK;
+ pr_info("ONFI flash detected\n");
return 1;
}
int i;
struct nand_chip *chip = mtd->priv;
+ /* New bad blocks should be marked in OOB, flash-based BBT, or both */
+ BUG_ON((chip->bbt_options & NAND_BBT_NO_OOB_BBM) &&
+ !(chip->bbt_options & NAND_BBT_USE_FLASH));
+
if (!(chip->options & NAND_OWN_BUFFERS))
chip->buffers = kmalloc(sizeof(*chip->buffers), GFP_KERNEL);
if (!chip->buffers)
if (!chip->ecc.size)
chip->ecc.size = 256;
chip->ecc.bytes = 3;
+ chip->ecc.strength = 1;
break;
case NAND_ECC_SOFT_BCH:
pr_warn("BCH ECC initialization failed!\n");
BUG();
}
+ chip->ecc.strength =
+ chip->ecc.bytes*8 / fls(8*chip->ecc.size);
break;
case NAND_ECC_NONE:
chip->ecc.write_oob = nand_write_oob_std;
chip->ecc.size = mtd->writesize;
chip->ecc.bytes = 0;
+ chip->ecc.strength = 0;
break;
default:
mtd->type = MTD_NANDFLASH;
mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM :
MTD_CAP_NANDFLASH;
- mtd->erase = nand_erase;
- mtd->point = NULL;
- mtd->unpoint = NULL;
- mtd->read = nand_read;
- mtd->write = nand_write;
- mtd->panic_write = panic_nand_write;
- mtd->read_oob = nand_read_oob;
- mtd->write_oob = nand_write_oob;
- mtd->sync = nand_sync;
- mtd->lock = NULL;
- mtd->unlock = NULL;
- mtd->suspend = nand_suspend;
- mtd->resume = nand_resume;
- mtd->block_isbad = nand_block_isbad;
- mtd->block_markbad = nand_block_markbad;
+ mtd->_erase = nand_erase;
+ mtd->_point = NULL;
+ mtd->_unpoint = NULL;
+ mtd->_read = nand_read;
+ mtd->_write = nand_write;
+ mtd->_panic_write = panic_nand_write;
+ mtd->_read_oob = nand_read_oob;
+ mtd->_write_oob = nand_write_oob;
+ mtd->_sync = nand_sync;
+ mtd->_lock = NULL;
+ mtd->_unlock = NULL;
+ mtd->_suspend = nand_suspend;
+ mtd->_resume = nand_resume;
+ mtd->_block_isbad = nand_block_isbad;
+ mtd->_block_markbad = nand_block_markbad;
mtd->writebufsize = mtd->writesize;
- /* propagate ecc.layout to mtd_info */
+ /* propagate ecc info to mtd_info */
mtd->ecclayout = chip->ecc.layout;
+ mtd->ecc_strength = chip->ecc.strength * chip->ecc.steps;
/* Check, if we should skip the bad block table scan */
if (chip->options & NAND_SKIP_BBTSCAN)
projects / linux-beck.git / blobdiff