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[MTD] [OneNAND] Consolidate OneNAND operation order

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Consolidate OneNAND operation order as OneNAND Spec.
It also doesn't break previous operation order.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Kyungmin Park 2007-12-11 11:13:18 +09:00
parent 9d2f0b7a3d
commit b21b72cf33
1 changed files with 4 additions and 15 deletions
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19
drivers/mtd/onenand/onenand_base.c
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@ -182,8 +182,7 @@ static int onenand_buffer_address(int dataram1, int sectors, int count)
static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len) static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len)
{ {
struct onenand_chip *this = mtd->priv; struct onenand_chip *this = mtd->priv;
int value, readcmd = 0, block_cmd = 0; int value, block, page;
int block, page;
/* Address translation */ /* Address translation */
switch (cmd) { switch (cmd) {
@ -198,7 +197,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
case ONENAND_CMD_ERASE: case ONENAND_CMD_ERASE:
case ONENAND_CMD_BUFFERRAM: case ONENAND_CMD_BUFFERRAM:
case ONENAND_CMD_OTP_ACCESS: case ONENAND_CMD_OTP_ACCESS:
block_cmd = 1;
block = (int) (addr >> this->erase_shift); block = (int) (addr >> this->erase_shift);
page = -1; page = -1;
break; break;
@ -240,11 +238,9 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
value = onenand_block_address(this, block); value = onenand_block_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
if (block_cmd) { /* Select DataRAM for DDP */
/* Select DataRAM for DDP */ value = onenand_bufferram_address(this, block);
value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
}
} }
if (page != -1) { if (page != -1) {
@ -256,7 +252,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
case ONENAND_CMD_READ: case ONENAND_CMD_READ:
case ONENAND_CMD_READOOB: case ONENAND_CMD_READOOB:
dataram = ONENAND_SET_NEXT_BUFFERRAM(this); dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
readcmd = 1;
break; break;
default: default:
@ -273,12 +268,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
/* Write 'BSA, BSC' of DataRAM */ /* Write 'BSA, BSC' of DataRAM */
value = onenand_buffer_address(dataram, sectors, count); value = onenand_buffer_address(dataram, sectors, count);
this->write_word(value, this->base + ONENAND_REG_START_BUFFER); this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
if (readcmd) {
/* Select DataRAM for DDP */
value = onenand_bufferram_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
}
} }
/* Interrupt clear */ /* Interrupt clear */