mtd: rawnand: Use the ECC framework user input parsing bits
Many helpers are generic to all NAND chips, they should not be raw-NAND specific, so use the generic ones. To avoid moving all the raw NAND core "history" into the generic NAND layer, we keep a part of this parsing in the raw NAND core to ensure backward compatibility. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-20-miquel.raynal@bootlin.com
This commit is contained in:
parent
8c126720fe
commit
d7157ff49a
@ -4877,18 +4877,27 @@ free_detect_allocation:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const char * const nand_ecc_modes[] = {
|
||||
static enum nand_ecc_engine_type
|
||||
of_get_rawnand_ecc_engine_type_legacy(struct device_node *np)
|
||||
{
|
||||
enum nand_ecc_legacy_mode {
|
||||
NAND_ECC_INVALID,
|
||||
NAND_ECC_NONE,
|
||||
NAND_ECC_SOFT,
|
||||
NAND_ECC_SOFT_BCH,
|
||||
NAND_ECC_HW,
|
||||
NAND_ECC_HW_SYNDROME,
|
||||
NAND_ECC_ON_DIE,
|
||||
};
|
||||
const char * const nand_ecc_legacy_modes[] = {
|
||||
[NAND_ECC_NONE] = "none",
|
||||
[NAND_ECC_SOFT] = "soft",
|
||||
[NAND_ECC_SOFT_BCH] = "soft_bch",
|
||||
[NAND_ECC_HW] = "hw",
|
||||
[NAND_ECC_HW_SYNDROME] = "hw_syndrome",
|
||||
[NAND_ECC_ON_DIE] = "on-die",
|
||||
};
|
||||
|
||||
static enum nand_ecc_engine_type
|
||||
of_get_nand_ecc_engine_type(struct device_node *np)
|
||||
{
|
||||
enum nand_ecc_mode eng_type;
|
||||
};
|
||||
enum nand_ecc_legacy_mode eng_type;
|
||||
const char *pm;
|
||||
int err;
|
||||
|
||||
@ -4897,12 +4906,13 @@ of_get_nand_ecc_engine_type(struct device_node *np)
|
||||
return NAND_ECC_ENGINE_TYPE_INVALID;
|
||||
|
||||
for (eng_type = NAND_ECC_NONE;
|
||||
eng_type < ARRAY_SIZE(nand_ecc_modes); eng_type++) {
|
||||
if (!strcasecmp(pm, nand_ecc_modes[eng_type])) {
|
||||
eng_type < ARRAY_SIZE(nand_ecc_legacy_modes); eng_type++) {
|
||||
if (!strcasecmp(pm, nand_ecc_legacy_modes[eng_type])) {
|
||||
switch (eng_type) {
|
||||
case NAND_ECC_NONE:
|
||||
return NAND_ECC_ENGINE_TYPE_NONE;
|
||||
case NAND_ECC_SOFT:
|
||||
case NAND_ECC_SOFT_BCH:
|
||||
return NAND_ECC_ENGINE_TYPE_SOFT;
|
||||
case NAND_ECC_HW:
|
||||
case NAND_ECC_HW_SYNDROME:
|
||||
@ -4915,43 +4925,29 @@ of_get_nand_ecc_engine_type(struct device_node *np)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* For backward compatibility we support few obsoleted values that don't
|
||||
* have their mappings into the nand_ecc_engine_providers enum anymore
|
||||
* (they were merged with other enums).
|
||||
*/
|
||||
if (!strcasecmp(pm, "soft_bch"))
|
||||
return NAND_ECC_ENGINE_TYPE_SOFT;
|
||||
|
||||
return NAND_ECC_ENGINE_TYPE_INVALID;
|
||||
}
|
||||
|
||||
static const char * const nand_ecc_algos[] = {
|
||||
[NAND_ECC_ALGO_HAMMING] = "hamming",
|
||||
[NAND_ECC_ALGO_BCH] = "bch",
|
||||
[NAND_ECC_ALGO_RS] = "rs",
|
||||
};
|
||||
|
||||
static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
|
||||
static enum nand_ecc_placement
|
||||
of_get_rawnand_ecc_placement_legacy(struct device_node *np)
|
||||
{
|
||||
enum nand_ecc_algo ecc_algo;
|
||||
const char *pm;
|
||||
int err;
|
||||
|
||||
err = of_property_read_string(np, "nand-ecc-algo", &pm);
|
||||
err = of_property_read_string(np, "nand-ecc-mode", &pm);
|
||||
if (!err) {
|
||||
for (ecc_algo = NAND_ECC_ALGO_HAMMING;
|
||||
ecc_algo < ARRAY_SIZE(nand_ecc_algos);
|
||||
ecc_algo++) {
|
||||
if (!strcasecmp(pm, nand_ecc_algos[ecc_algo]))
|
||||
return ecc_algo;
|
||||
}
|
||||
if (!strcasecmp(pm, "hw_syndrome"))
|
||||
return NAND_ECC_PLACEMENT_INTERLEAVED;
|
||||
}
|
||||
|
||||
/*
|
||||
* For backward compatibility we also read "nand-ecc-mode" checking
|
||||
* for some obsoleted values that were specifying ECC algorithm.
|
||||
*/
|
||||
return NAND_ECC_PLACEMENT_UNKNOWN;
|
||||
}
|
||||
|
||||
static enum nand_ecc_algo of_get_rawnand_ecc_algo_legacy(struct device_node *np)
|
||||
{
|
||||
const char *pm;
|
||||
int err;
|
||||
|
||||
err = of_property_read_string(np, "nand-ecc-mode", &pm);
|
||||
if (!err) {
|
||||
if (!strcasecmp(pm, "soft"))
|
||||
@ -4963,22 +4959,19 @@ static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
|
||||
return NAND_ECC_ALGO_UNKNOWN;
|
||||
}
|
||||
|
||||
static int of_get_nand_ecc_step_size(struct device_node *np)
|
||||
static void of_get_nand_ecc_legacy_user_config(struct nand_chip *chip)
|
||||
{
|
||||
int ret;
|
||||
u32 val;
|
||||
struct device_node *dn = nand_get_flash_node(chip);
|
||||
struct nand_ecc_props *user_conf = &chip->base.ecc.user_conf;
|
||||
|
||||
ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
|
||||
return ret ? ret : val;
|
||||
}
|
||||
if (user_conf->engine_type == NAND_ECC_ENGINE_TYPE_INVALID)
|
||||
user_conf->engine_type = of_get_rawnand_ecc_engine_type_legacy(dn);
|
||||
|
||||
static int of_get_nand_ecc_strength(struct device_node *np)
|
||||
{
|
||||
int ret;
|
||||
u32 val;
|
||||
if (user_conf->algo == NAND_ECC_ALGO_UNKNOWN)
|
||||
user_conf->algo = of_get_rawnand_ecc_algo_legacy(dn);
|
||||
|
||||
ret = of_property_read_u32(np, "nand-ecc-strength", &val);
|
||||
return ret ? ret : val;
|
||||
if (user_conf->placement == NAND_ECC_PLACEMENT_UNKNOWN)
|
||||
user_conf->placement = of_get_rawnand_ecc_placement_legacy(dn);
|
||||
}
|
||||
|
||||
static int of_get_nand_bus_width(struct device_node *np)
|
||||
@ -5002,12 +4995,10 @@ static bool of_get_nand_on_flash_bbt(struct device_node *np)
|
||||
return of_property_read_bool(np, "nand-on-flash-bbt");
|
||||
}
|
||||
|
||||
static int nand_dt_init(struct nand_chip *chip)
|
||||
static int rawnand_dt_init(struct nand_chip *chip)
|
||||
{
|
||||
struct nand_device *nand = mtd_to_nanddev(nand_to_mtd(chip));
|
||||
struct device_node *dn = nand_get_flash_node(chip);
|
||||
enum nand_ecc_engine_type ecc_type;
|
||||
enum nand_ecc_algo ecc_algo;
|
||||
int ecc_strength, ecc_step;
|
||||
|
||||
if (!dn)
|
||||
return 0;
|
||||
@ -5021,26 +5012,33 @@ static int nand_dt_init(struct nand_chip *chip)
|
||||
if (of_get_nand_on_flash_bbt(dn))
|
||||
chip->bbt_options |= NAND_BBT_USE_FLASH;
|
||||
|
||||
ecc_type = of_get_nand_ecc_engine_type(dn);
|
||||
ecc_algo = of_get_nand_ecc_algo(dn);
|
||||
ecc_strength = of_get_nand_ecc_strength(dn);
|
||||
ecc_step = of_get_nand_ecc_step_size(dn);
|
||||
|
||||
if (ecc_type != NAND_ECC_ENGINE_TYPE_INVALID)
|
||||
chip->ecc.engine_type = ecc_type;
|
||||
|
||||
if (ecc_algo != NAND_ECC_ALGO_UNKNOWN)
|
||||
chip->ecc.algo = ecc_algo;
|
||||
|
||||
if (ecc_strength >= 0)
|
||||
chip->ecc.strength = ecc_strength;
|
||||
|
||||
if (ecc_step > 0)
|
||||
chip->ecc.size = ecc_step;
|
||||
|
||||
if (of_property_read_bool(dn, "nand-ecc-maximize"))
|
||||
chip->ecc.options |= NAND_ECC_MAXIMIZE;
|
||||
|
||||
of_get_nand_ecc_user_config(nand);
|
||||
of_get_nand_ecc_legacy_user_config(chip);
|
||||
|
||||
/*
|
||||
* If neither the user nor the NAND controller have requested a specific
|
||||
* ECC engine type, we will default to NAND_ECC_ENGINE_TYPE_ON_HOST.
|
||||
*/
|
||||
nand->ecc.defaults.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
|
||||
|
||||
/*
|
||||
* Use the user requested engine type, unless there is none, in this
|
||||
* case default to the NAND controller choice, otherwise fallback to
|
||||
* the raw NAND default one.
|
||||
*/
|
||||
if (nand->ecc.user_conf.engine_type != NAND_ECC_ENGINE_TYPE_INVALID)
|
||||
chip->ecc.engine_type = nand->ecc.user_conf.engine_type;
|
||||
if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_INVALID)
|
||||
chip->ecc.engine_type = nand->ecc.defaults.engine_type;
|
||||
|
||||
chip->ecc.placement = nand->ecc.user_conf.placement;
|
||||
chip->ecc.algo = nand->ecc.user_conf.algo;
|
||||
chip->ecc.strength = nand->ecc.user_conf.strength;
|
||||
chip->ecc.size = nand->ecc.user_conf.step_size;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -5077,7 +5075,7 @@ static int nand_scan_ident(struct nand_chip *chip, unsigned int maxchips,
|
||||
/* Enforce the right timings for reset/detection */
|
||||
chip->current_interface_config = nand_get_reset_interface_config();
|
||||
|
||||
ret = nand_dt_init(chip);
|
||||
ret = rawnand_dt_init(chip);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
@ -81,18 +81,6 @@ struct nand_chip;
|
||||
|
||||
#define NAND_DATA_IFACE_CHECK_ONLY -1
|
||||
|
||||
/*
|
||||
* Constants for ECC_MODES
|
||||
*/
|
||||
enum nand_ecc_mode {
|
||||
NAND_ECC_INVALID,
|
||||
NAND_ECC_NONE,
|
||||
NAND_ECC_SOFT,
|
||||
NAND_ECC_HW,
|
||||
NAND_ECC_HW_SYNDROME,
|
||||
NAND_ECC_ON_DIE,
|
||||
};
|
||||
|
||||
/*
|
||||
* Constants for Hardware ECC
|
||||
*/
|
||||
|
Loading…
Reference in New Issue
Block a user