Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-25 06:00:43 +00:00
Code Issues Projects Releases Packages Wiki Activity

mtd: atmel_nand: alloc memory instead of use static array for pmecc data

Browse source 
In this way, the pmecc corraction capbility can change in run time.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Wu, Josh 2013-07-03 11:11:48 +08:00 committed by Andreas Bießmann
parent 2f96b06be5
commit ddd85974b1
1 changed files with 56 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

63
drivers/mtd/nand/atmel_nand.c
View file

@ -16,6 +16,7 @@
#include <asm/arch/gpio.h>
#include <asm/arch/at91_pio.h>
#include <malloc.h>
#include <nand.h>
#include <watchdog.h>
@ -50,13 +51,13 @@ struct atmel_nand_host {
void __iomem *pmecc_index_of;
/* data for pmecc computation */
int16_t pmecc_smu[(CONFIG_PMECC_CAP + 2) * (2 * CONFIG_PMECC_CAP + 1)];
int16_t pmecc_partial_syn[2 * CONFIG_PMECC_CAP + 1];
int16_t pmecc_si[2 * CONFIG_PMECC_CAP + 1];
int16_t pmecc_lmu[CONFIG_PMECC_CAP + 1]; /* polynomal order */
int pmecc_mu[CONFIG_PMECC_CAP + 1];
int pmecc_dmu[CONFIG_PMECC_CAP + 1];
int pmecc_delta[CONFIG_PMECC_CAP + 1];
int16_t *pmecc_smu;
int16_t *pmecc_partial_syn;
int16_t *pmecc_si;
int16_t *pmecc_lmu; /* polynomal order */
int *pmecc_mu;
int *pmecc_dmu;
int *pmecc_delta;
};
static struct atmel_nand_host pmecc_host;
@ -109,6 +110,48 @@ static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host)
table_size * sizeof(int16_t);
}
static void pmecc_data_free(struct atmel_nand_host *host)
{
free(host->pmecc_partial_syn);
free(host->pmecc_si);
free(host->pmecc_lmu);
free(host->pmecc_smu);
free(host->pmecc_mu);
free(host->pmecc_dmu);
free(host->pmecc_delta);
}
static int pmecc_data_alloc(struct atmel_nand_host *host)
{
const int cap = host->pmecc_corr_cap;
int size;
size = (2 * cap + 1) * sizeof(int16_t);
host->pmecc_partial_syn = malloc(size);
host->pmecc_si = malloc(size);
host->pmecc_lmu = malloc((cap + 1) * sizeof(int16_t));
host->pmecc_smu = malloc((cap + 2) * size);
size = (cap + 1) * sizeof(int);
host->pmecc_mu = malloc(size);
host->pmecc_dmu = malloc(size);
host->pmecc_delta = malloc(size);
if (host->pmecc_partial_syn &&
host->pmecc_si &&
host->pmecc_lmu &&
host->pmecc_smu &&
host->pmecc_mu &&
host->pmecc_dmu &&
host->pmecc_delta)
return 0;
/* error happened */
pmecc_data_free(host);
return -ENOMEM;
}
static void pmecc_gen_syndrome(struct mtd_info *mtd, int sector)
{
struct nand_chip *nand_chip = mtd->priv;
@ -694,6 +737,12 @@ static int atmel_pmecc_nand_init_params(struct nand_chip *nand,
return 0;
}
/* Allocate data for PMECC computation */
if (pmecc_data_alloc(host)) {
dev_err(host->dev, "Cannot allocate memory for PMECC computation!\n");
return -ENOMEM;
}
nand->ecc.read_page = atmel_nand_pmecc_read_page;
nand->ecc.write_page = atmel_nand_pmecc_write_page;
nand->ecc.strength = cap;