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Flex-OneNAND driver support

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This patch adds support for Flex-OneNAND devices.

Signed-off-by: Rohit Hagargundgi <h.rohit@samsung.com>
Signed-off-by: Amul Kumar Saha <amul.saha@samsung.com>
This commit is contained in:
Amul Kumar Saha 2009-11-06 17:15:31 +05:30 • committed by Scott Wood
parent 35209cbcee
commit cacbe91958
6 changed files with 705 additions and 103 deletions
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16
include/linux/mtd/onenand.h
View file

@ -20,8 +20,9 @@
#include <linux/mtd/compat.h>
#include <linux/mtd/bbm.h>
#define MAX_DIES 2
#define MAX_BUFFERRAM 2
#define MAX_ONENAND_PAGESIZE (2048 + 64)
#define MAX_ONENAND_PAGESIZE (4096 + 128)
/* Scan and identify a OneNAND device */
extern int onenand_scan (struct mtd_info *mtd, int max_chips);
@ -39,9 +40,14 @@ struct onenand_bufferram {
/**
* struct onenand_chip - OneNAND Private Flash Chip Data
* @param base [BOARDSPECIFIC] address to access OneNAND
* @dies: [INTERN][FLEXONENAND] number of dies on chip
* @boundary: [INTERN][FLEXONENAND] Boundary of the dies
* @diesize: [INTERN][FLEXONENAND] Size of the dies
* @param chipsize [INTERN] the size of one chip for multichip arrays
* @param device_id [INTERN] device ID
* @param verstion_id [INTERN] version ID
* @technology [INTERN] describes the internal NAND array technology such as SLC or MLC.
* @density_mask: [INTERN] chip density, used for DDP devices
* @param options [BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about
* @param erase_shift [INTERN] number of address bits in a block
* @param page_shift [INTERN] number of address bits in a page
@ -64,9 +70,13 @@ struct onenand_bufferram {
*/
struct onenand_chip {
void __iomem *base;
unsigned int dies;
unsigned int boundary[MAX_DIES];
unsigned int diesize[MAX_DIES];
unsigned int chipsize;
unsigned int device_id;
unsigned int version_id;
unsigned int technology;
unsigned int density_mask;
unsigned int options;
@ -124,6 +134,8 @@ struct onenand_chip {
#define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0)
#define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1)
#define FLEXONENAND(this) (this->device_id & DEVICE_IS_FLEXONENAND)
#define ONENAND_IS_MLC(this) (this->technology & ONENAND_TECHNOLOGY_IS_MLC)
#define ONENAND_IS_DDP(this) \
(this->device_id & ONENAND_DEVICE_IS_DDP)
@ -157,4 +169,6 @@ struct onenand_manufacturers {
int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops);
unsigned int onenand_block(struct onenand_chip *this, loff_t addr);
int flexonenand_region(struct mtd_info *mtd, loff_t addr);
#endif /* __LINUX_MTD_ONENAND_H */