ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
if (ctrl & ONENAND_CTRL_ERROR) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x", ctrl);
- return -EIO;
+ /* It maybe occur at initial bad block */
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl);
+ /* Clear other interrupt bits for preventing ECC error */
+ interrupt &= ONENAND_INT_MASTER;
}
if (ctrl & ONENAND_CTRL_LOCK) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error = 0x%04x", ctrl);
- return -EIO;
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error = 0x%04x\n", ctrl);
+ return -EACCES;
}
if (interrupt & ONENAND_INT_READ) {
ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
if (ecc & ONENAND_ECC_2BIT_ALL) {
- DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x", ecc);
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc);
return -EBADMSG;
}
}
return onenand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL);
}
+/**
+ * onenand_block_checkbad - [GENERIC] Check if a block is marked bad
+ * @param mtd MTD device structure
+ * @param ofs offset from device start
+ * @param getchip 0, if the chip is already selected
+ * @param allowbbt 1, if its allowed to access the bbt area
+ *
+ * Check, if the block is bad. Either by reading the bad block table or
+ * calling of the scan function.
+ */
+static int onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt)
+{
+ struct onenand_chip *this = mtd->priv;
+ struct bbm_info *bbm = this->bbm;
+
+ /* Return info from the table */
+ return bbm->isbad_bbt(mtd, ofs, allowbbt);
+}
+
/**
* onenand_erase - [MTD Interface] erase block(s)
* @param mtd MTD device structure
while (len) {
- /* TODO Check badblock */
+ /* Check if we have a bad block, we do not erase bad blocks */
+ if (onenand_block_checkbad(mtd, addr, 0, 0)) {
+ printk (KERN_WARNING "onenand_erase: attempt to erase a bad block at addr 0x%08x\n", (unsigned int) addr);
+ instr->state = MTD_ERASE_FAILED;
+ goto erase_exit;
+ }
this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
onenand_release_device(mtd);
}
+
/**
* onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
+ *
+ * Check whether the block is bad
*/
static int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
{
- /*
- * TODO
- * 1. Bad block table (BBT)
- * -> using NAND BBT to support JFFS2
- * 2. Bad block management (BBM)
- * -> bad block replace scheme
- *
- * Currently we do nothing
- */
- return 0;
+ /* Check for invalid offset */
+ if (ofs > mtd->size)
+ return -EINVAL;
+
+ return onenand_block_checkbad(mtd, ofs, 1, 0);
+}
+
+/**
+ * onenand_default_block_markbad - [DEFAULT] mark a block bad
+ * @param mtd MTD device structure
+ * @param ofs offset from device start
+ *
+ * This is the default implementation, which can be overridden by
+ * a hardware specific driver.
+ */
+static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ struct onenand_chip *this = mtd->priv;
+ struct bbm_info *bbm = this->bbm;
+ u_char buf[2] = {0, 0};
+ size_t retlen;
+ int block;
+
+ /* Get block number */
+ block = ((int) ofs) >> bbm->bbt_erase_shift;
+ if (bbm->bbt)
+ bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
+
+ /* We write two bytes, so we dont have to mess with 16 bit access */
+ ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
+ return mtd->write_oob(mtd, ofs , 2, &retlen, buf);
}
/**
* onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
+ *
+ * Mark the block as bad
*/
static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
- /* see above */
- return 0;
+ struct onenand_chip *this = mtd->priv;
+ int ret;
+
+ ret = onenand_block_isbad(mtd, ofs);
+ if (ret) {
+ /* If it was bad already, return success and do nothing */
+ if (ret > 0)
+ return 0;
+ return ret;
+ }
+
+ return this->block_markbad(mtd, ofs);
}
/**
if (!this->write_bufferram)
this->write_bufferram = onenand_write_bufferram;
+ if (!this->block_markbad)
+ this->block_markbad = onenand_default_block_markbad;
+ if (!this->scan_bbt)
+ this->scan_bbt = onenand_default_bbt;
+
if (onenand_probe(mtd))
return -ENXIO;
/* Unlock whole block */
mtd->unlock(mtd, 0x0, this->chipsize);
- return 0;
+ return this->scan_bbt(mtd);
}
/**
#include <linux/spinlock.h>
#include <linux/mtd/onenand_regs.h>
+#include <linux/mtd/bbm.h>
#define MAX_BUFFERRAM 2
* @param wait [REPLACEABLE] hardware specific function for wait on ready
* @param read_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area
* @param write_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area
+ * @param read_word [REPLACEABLE] hardware specific function for read register of OneNAND
+ * @param write_word [REPLACEABLE] hardware specific function for write register of OneNAND
+ * @param scan_bbt [REPLACEALBE] hardware specific function for scaning Bad block Table
* @param chip_lock [INTERN] spinlock used to protect access to this structure and the chip
* @param wq [INTERN] wait queue to sleep on if a OneNAND operation is in progress
* @param state [INTERN] the current state of the OneNAND device
* @param autooob [REPLACEABLE] the default (auto)placement scheme
+ * @param bbm [REPLACEABLE] pointer to Bad Block Management
* @param priv [OPTIONAL] pointer to private chip date
*/
struct onenand_chip {
unsigned short (*read_word)(void __iomem *addr);
void (*write_word)(unsigned short value, void __iomem *addr);
void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
+ int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
+ int (*scan_bbt)(struct mtd_info *mtd);
spinlock_t chip_lock;
wait_queue_head_t wq;
struct nand_oobinfo *autooob;
+ void *bbm;
+
void *priv;
};
projects / linux-2.6-omap-h63xx.git / commitdiff