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mtd: add helpers to get the supportted ONFI timing mode 

add onfi_get_async_timing_mode() to get the supportted asynchronous
timing mode.

add onfi_get_sync_timing_mode() to get the supportted synchronous
timing mode.

Also add the neccessary macros : the timing modes.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Huang Shijie 2012-09-13 14:57:53 +08:00 committed by David Woodhouse
parent 7db03eccfc
commit 3e70192c41
1 changed files with 25 additions and 0 deletions
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25
include/linux/mtd/nand.h
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@ -231,6 +231,15 @@ typedef enum {
/* Keep gcc happy */
struct nand_chip;
/* ONFI timing mode, used in both asynchronous and synchronous mode */
#define ONFI_TIMING_MODE_0 (1 << 0)
#define ONFI_TIMING_MODE_1 (1 << 1)
#define ONFI_TIMING_MODE_2 (1 << 2)
#define ONFI_TIMING_MODE_3 (1 << 3)
#define ONFI_TIMING_MODE_4 (1 << 4)
#define ONFI_TIMING_MODE_5 (1 << 5)
#define ONFI_TIMING_MODE_UNKNOWN (1 << 6)
/* ONFI feature address */
#define ONFI_FEATURE_ADDR_TIMING_MODE 0x1
@ -684,4 +693,20 @@ struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
return chip->priv;
}
/* return the supported asynchronous timing mode. */
static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
{
if (!chip->onfi_version)
return ONFI_TIMING_MODE_UNKNOWN;
return le16_to_cpu(chip->onfi_params.async_timing_mode);
}
/* return the supported synchronous timing mode. */
static inline int onfi_get_sync_timing_mode(struct nand_chip *chip)
{
if (!chip->onfi_version)
return ONFI_TIMING_MODE_UNKNOWN;
return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);
}
#endif /* __LINUX_MTD_NAND_H */