diff options
author | Kyungmin Park <kyungmin.park@samsung.com> | 2005-09-29 03:53:16 (GMT) |
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committer | Thomas Gleixner <tglx@mtd.linutronix.de> | 2005-11-06 21:59:48 (GMT) |
commit | 83a368380e172c1b2e9fd6ec2a62e457684adf0c (patch) | |
tree | dd5150d734a383ac042b02f7447f22a46f46a28c | |
parent | a41371eb6d9b368e53867cd85156f07371e9f72f (diff) | |
download | linux-fsl-qoriq-83a368380e172c1b2e9fd6ec2a62e457684adf0c.tar.xz |
[MTD] OneNAND: Enhanced support for DDP (Dual Densitiy Packages)
Add density mask for better support of DDP chips.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 39 | ||||
-rw-r--r-- | include/linux/mtd/onenand.h | 1 |
2 files changed, 19 insertions, 21 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index a002d40..99de2f0 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -84,25 +84,23 @@ static void onenand_writew(unsigned short value, void __iomem *addr) /** * onenand_block_address - [DEFAULT] Get block address - * @param device the device id + * @param this onenand chip data structure * @param block the block * @return translated block address if DDP, otherwise same * * Setup Start Address 1 Register (F100h) */ -static int onenand_block_address(int device, int block) +static int onenand_block_address(struct onenand_chip *this, int block) { - if (device & ONENAND_DEVICE_IS_DDP) { + if (this->device_id & ONENAND_DEVICE_IS_DDP) { /* Device Flash Core select, NAND Flash Block Address */ - int dfs = 0, density, mask; + int dfs = 0; - density = device >> ONENAND_DEVICE_DENSITY_SHIFT; - mask = (1 << (density + 6)); - - if (block & mask) + if (block & this->density_mask) dfs = 1; - return (dfs << ONENAND_DDP_SHIFT) | (block & (mask - 1)); + return (dfs << ONENAND_DDP_SHIFT) | + (block & (this->density_mask - 1)); } return block; @@ -110,22 +108,19 @@ static int onenand_block_address(int device, int block) /** * onenand_bufferram_address - [DEFAULT] Get bufferram address - * @param device the device id + * @param this onenand chip data structure * @param block the block * @return set DBS value if DDP, otherwise 0 * * Setup Start Address 2 Register (F101h) for DDP */ -static int onenand_bufferram_address(int device, int block) +static int onenand_bufferram_address(struct onenand_chip *this, int block) { - if (device & ONENAND_DEVICE_IS_DDP) { + if (this->device_id & ONENAND_DEVICE_IS_DDP) { /* Device BufferRAM Select */ - int dbs = 0, density, mask; - - density = device >> ONENAND_DEVICE_DENSITY_SHIFT; - mask = (1 << (density + 6)); + int dbs = 0; - if (block & mask) + if (block & this->density_mask) dbs = 1; return (dbs << ONENAND_DDP_SHIFT); @@ -223,7 +218,7 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le /* NOTE: The setting order of the registers is very important! */ if (cmd == ONENAND_CMD_BUFFERRAM) { /* Select DataRAM for DDP */ - value = onenand_bufferram_address(this->device_id, block); + value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); /* Switch to the next data buffer */ @@ -234,7 +229,7 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le if (block != -1) { /* Write 'DFS, FBA' of Flash */ - value = onenand_block_address(this->device_id, block); + value = onenand_block_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); } @@ -263,7 +258,7 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le if (readcmd) { /* Select DataRAM for DDP */ - value = onenand_bufferram_address(this->device_id, block); + value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); } } @@ -1313,7 +1308,7 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) continue; /* Set block address for read block status */ - value = onenand_block_address(this->device_id, block); + value = onenand_block_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); /* Check lock status */ @@ -1415,6 +1410,8 @@ static int onenand_probe(struct mtd_info *mtd) density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; this->chipsize = (16 << density) << 20; + /* Set density mask. it is used for DDP */ + this->density_mask = (1 << (density + 6)); /* OneNAND page size & block size */ /* The data buffer size is equal to page size */ diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h index afaa634..d27fd12 100644 --- a/include/linux/mtd/onenand.h +++ b/include/linux/mtd/onenand.h @@ -84,6 +84,7 @@ struct onenand_chip { void __iomem *base; unsigned int chipsize; unsigned int device_id; + unsigned int density_mask; unsigned int options; unsigned int erase_shift; |