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mtd: nand: Add manufacturer specific initialization/detection steps

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A lot of NANDs are implementing generic features in a non-generic way,
or are providing advanced auto-detection logic where the NAND ID bytes
meaning changes with the NAND generation.

Providing this vendor specific initialization step will allow us to get
rid of full-id entries in the nand_ids table or all the vendor specific
cases added over the time in the generic NAND ID decoding logic.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Boris Brezillon
2016-06-08 09:32:55 +02:00
parent bcc678c2d7
commit abbe26d144
2 changed files with 100 additions and 10 deletions
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35
include/linux/mtd/nand.h
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@@ -731,6 +731,20 @@ nand_get_sdr_timings(const struct nand_data_interface *conf)
return &conf->timings.sdr;
}
/**
* struct nand_manufacturer_ops - NAND Manufacturer operations
* @detect: detect the NAND memory organization and capabilities
* @init: initialize all vendor specific fields (like the ->read_retry()
* implementation) if any.
* @cleanup: the ->init() function may have allocated resources, ->cleanup()
* is here to let vendor specific code release those resources.
*/
struct nand_manufacturer_ops {
void (*detect)(struct nand_chip *chip);
int (*init)(struct nand_chip *chip);
void (*cleanup)(struct nand_chip *chip);
};
/**
* struct nand_chip - NAND Private Flash Chip Data
* @mtd: MTD device registered to the MTD framework
@@ -835,6 +849,7 @@ nand_get_sdr_timings(const struct nand_data_interface *conf)
* additional error status checks (determine if errors are
* correctable).
* @write_page: [REPLACEABLE] High-level page write function
* @manufacturer: [INTERN] Contains manufacturer information
*/
struct nand_chip {
@@ -923,6 +938,11 @@ struct nand_chip {
struct nand_bbt_descr *badblock_pattern;
void *priv;
struct {
const struct nand_manufacturer *desc;
void *priv;
} manufacturer;
};
extern const struct mtd_ooblayout_ops nand_ooblayout_sp_ops;
@@ -959,6 +979,17 @@ static inline void nand_set_controller_data(struct nand_chip *chip, void *priv)
chip->priv = priv;
}
static inline void nand_set_manufacturer_data(struct nand_chip *chip,
void *priv)
{
chip->manufacturer.priv = priv;
}
static inline void *nand_get_manufacturer_data(struct nand_chip *chip)
{
return chip->manufacturer.priv;
}
/*
* NAND Flash Manufacturer ID Codes
*/
@@ -1065,10 +1096,12 @@ struct nand_flash_dev {
* struct nand_manufacturer - NAND Flash Manufacturer structure
* @name: Manufacturer name
* @id: manufacturer ID code of device.
* @ops: manufacturer operations
*/
struct nand_manufacturer {
int id;
char *name;
const struct nand_manufacturer_ops *ops;
};
const struct nand_manufacturer *nand_get_manufacturer(u8 id);
@@ -1246,4 +1279,6 @@ int nand_reset(struct nand_chip *chip, int chipnr);
/* Free resources held by the NAND device */
void nand_cleanup(struct nand_chip *chip);
/* Default extended ID decoding function */
void nand_decode_ext_id(struct nand_chip *chip);
#endif /* __LINUX_MTD_NAND_H */