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path: root/drivers/mtd/onenand/onenand_base.c
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Diffstat (limited to 'drivers/mtd/onenand/onenand_base.c')
-rw-r--r--drivers/mtd/onenand/onenand_base.c131
1 files changed, 94 insertions, 37 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index ded1706ab..eaa48f948 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -331,7 +331,7 @@ static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
if (ONENAND_CURRENT_BUFFERRAM(this)) {
if (area == ONENAND_DATARAM)
- return mtd->oobblock;
+ return mtd->writesize;
if (area == ONENAND_SPARERAM)
return mtd->oobsize;
}
@@ -482,6 +482,30 @@ static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
}
/**
+ * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
+ * @param mtd MTD data structure
+ * @param addr start address to invalidate
+ * @param len length to invalidate
+ *
+ * Invalidate BufferRAM information
+ */
+static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
+ unsigned int len)
+{
+ struct onenand_chip *this = mtd->priv;
+ int i;
+ loff_t end_addr = addr + len;
+
+ /* Invalidate BufferRAM */
+ for (i = 0; i < MAX_BUFFERRAM; i++) {
+ loff_t buf_addr = this->bufferram[i].block << this->erase_shift;
+
+ if (buf_addr >= addr && buf_addr < end_addr)
+ this->bufferram[i].valid = 0;
+ }
+}
+
+/**
* onenand_get_device - [GENERIC] Get chip for selected access
* @param mtd MTD device structure
* @param new_state the state which is requested
@@ -541,15 +565,15 @@ static int onenand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
onenand_get_device(mtd, FL_READING);
while (read < len) {
- thislen = min_t(int, mtd->oobblock, len - read);
+ thislen = min_t(int, mtd->writesize, len - read);
- column = from & (mtd->oobblock - 1);
- if (column + thislen > mtd->oobblock)
- thislen = mtd->oobblock - column;
+ column = from & (mtd->writesize - 1);
+ if (column + thislen > mtd->writesize)
+ thislen = mtd->writesize - column;
if (!onenand_check_bufferram(mtd, from)) {
this->command(mtd, ONENAND_CMD_READ, from,
- mtd->oobblock);
+ mtd->writesize);
ret = this->wait(mtd, FL_READING);
/* First copy data and check return value for ECC handling */
onenand_update_bufferram(mtd, from, 1);
@@ -664,7 +688,7 @@ int onenand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
/* Read more? */
if (read < len) {
/* Page size */
- from += mtd->oobblock;
+ from += mtd->writesize;
column = 0;
}
}
@@ -691,7 +715,7 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char * buf,
void __iomem *dataram0, *dataram1;
int ret = 0;
- this->command(mtd, ONENAND_CMD_READ, addr, mtd->oobblock);
+ this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize);
ret = this->wait(mtd, FL_READING);
if (ret)
@@ -701,9 +725,9 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char * buf,
/* Check, if the two dataram areas are same */
dataram0 = this->base + ONENAND_DATARAM;
- dataram1 = dataram0 + mtd->oobblock;
+ dataram1 = dataram0 + mtd->writesize;
- if (memcmp(dataram0, dataram1, mtd->oobblock))
+ if (memcmp(dataram0, dataram1, mtd->writesize))
return -EBADMSG;
return 0;
@@ -712,7 +736,7 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char * buf,
#define onenand_verify_page(...) (0)
#endif
-#define NOTALIGNED(x) ((x & (mtd->oobblock - 1)) != 0)
+#define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0)
/**
* onenand_write_ecc - [MTD Interface] OneNAND write with ECC
@@ -760,15 +784,15 @@ static int onenand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
/* Loop until all data write */
while (written < len) {
- int thislen = min_t(int, mtd->oobblock, len - written);
+ int thislen = min_t(int, mtd->writesize, len - written);
- this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
+ this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize);
this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen);
this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0,
mtd->oobsize);
- this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
+ this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
onenand_update_bufferram(mtd, to, 1);
@@ -893,6 +917,25 @@ int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
}
/**
+ * onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
+ * @param mtd MTD device structure
+ * @param ofs offset from device start
+ * @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_isbad_nolock(struct mtd_info *mtd, loff_t ofs, 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
* @param instr erase instruction
@@ -950,6 +993,8 @@ int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
+ onenand_invalidate_bufferram(mtd, addr, block_size);
+
ret = this->wait(mtd, FL_ERASING);
/* Check, if it is write protected */
if (ret) {
@@ -1005,30 +1050,45 @@ void onenand_sync(struct mtd_info *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
*/
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;
+ int ret;
+
+ /* Check for invalid offset */
+ if (ofs > mtd->size)
+ return -EINVAL;
+
+ onenand_get_device(mtd, FL_READING);
+ ret = onenand_block_isbad_nolock(mtd,ofs, 0);
+ onenand_release_device(mtd);
+ return ret;
}
/**
* 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
*/
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;
+ }
+
+ ret = this->block_markbad(mtd, ofs);
+ return ret;
}
/**
@@ -1184,10 +1244,8 @@ static int onenand_probe(struct mtd_info *mtd)
/* Reset OneNAND to read default register values */
this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
- {
- int i;
- for (i = 0; i < 10000; i++) ;
- }
+ /* Wait reset */
+ this->wait(mtd, FL_RESETING);
/* Read manufacturer and device IDs from Register */
maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
@@ -1212,16 +1270,16 @@ static int onenand_probe(struct mtd_info *mtd)
/* OneNAND page size & block size */
/* The data buffer size is equal to page size */
- mtd->oobblock =
+ mtd->writesize =
this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
- mtd->oobsize = mtd->oobblock >> 5;
+ mtd->oobsize = mtd->writesize >> 5;
/* Pagers per block is always 64 in OneNAND */
- mtd->erasesize = mtd->oobblock << 6;
+ mtd->erasesize = mtd->writesize << 6;
this->erase_shift = ffs(mtd->erasesize) - 1;
- this->page_shift = ffs(mtd->oobblock) - 1;
+ this->page_shift = ffs(mtd->writesize) - 1;
this->ppb_shift = (this->erase_shift - this->page_shift);
- this->page_mask = (mtd->erasesize / mtd->oobblock) - 1;
+ this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
/* REVIST: Multichip handling */
@@ -1240,11 +1298,10 @@ static int onenand_probe(struct mtd_info *mtd)
this->options |= ONENAND_CONT_LOCK;
}
+ mtd->flags = MTD_CAP_NANDFLASH;
mtd->erase = onenand_erase;
mtd->read = onenand_read;
mtd->write = onenand_write;
- mtd->read_ecc = onenand_read_ecc;
- mtd->write_ecc = onenand_write_ecc;
mtd->read_oob = onenand_read_oob;
mtd->write_oob = onenand_write_oob;
mtd->sync = onenand_sync;
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 18:51:38 +0000