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mtd: rawnand: prepare the removal of the ONFI parameter page

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The NAND chip parameter page is statically allocated within the
nand_chip structure, which reserves a lot of space. Even not ONFI nor
JEDEC chips have it embedded. Also, only a few parameters are actually
read from the parameter page after the detection.

ONFI-related parameters that will be used outside from the
identification function are stored in a separate onfi_parameters
structure embedded in nand_parameters, this small structure that
already hold generic parameters.

For now, the onfi_parameters structure is allocated statically. However,
after some deep rework in the NAND framework, it will be possible to do
dynamic allocations from the NAND identification phase, and this
strcuture will then be dynamically allocated when needed.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Miquel Raynal
2018-03-19 14:47:27 +01:00
committed by Boris Brezillon
parent f4531b2b19
commit a97421c753
5 changed files with 64 additions and 46 deletions
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19
drivers/mtd/nand/raw/nand_micron.c
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@@ -56,17 +56,14 @@ static int micron_nand_setup_read_retry(struct mtd_info *mtd, int retry_mode)
*/
static int micron_nand_onfi_init(struct nand_chip *chip)
{
struct nand_onfi_params *p = &chip->onfi_params;
struct nand_onfi_vendor_micron *micron = (void *)p->vendor;
struct nand_parameters *p = &chip->parameters;
struct nand_onfi_vendor_micron *micron = (void *)p->onfi.vendor;
if (!chip->onfi_version)
return 0;
if (chip->parameters.onfi.version && p->onfi.vendor_revision) {
chip->read_retries = micron->read_retry_options;
chip->setup_read_retry = micron_nand_setup_read_retry;
}
if (le16_to_cpu(p->vendor_revision) < 1)
return 0;
chip->read_retries = micron->read_retry_options;
chip->setup_read_retry = micron_nand_setup_read_retry;
return 0;
}
@@ -207,7 +204,7 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip)
u8 feature[ONFI_SUBFEATURE_PARAM_LEN] = { 0, };
int ret;
if (chip->onfi_version == 0)
if (!chip->parameters.onfi.version)
return MICRON_ON_DIE_UNSUPPORTED;
if (chip->bits_per_cell != 1)
@@ -239,7 +236,7 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip)
* Some Micron NANDs have an on-die ECC of 4/512, some other
* 8/512. We only support the former.
*/
if (chip->onfi_params.ecc_bits != 4)
if (chip->ecc_strength_ds != 4)
return MICRON_ON_DIE_UNSUPPORTED;
return MICRON_ON_DIE_SUPPORTED;