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Merge branch 'master' of git://git.denx.de/u-boot-nand-flash

This commit is contained in:
Wolfgang Denk 2009-02-07 23:37:10 +01:00
parent 0cfa6a9de6 8da601280a
commit 64ace0d1e5
3 changed files with 27 additions and 4 deletions
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6
common/env_nand.c
View File

@ -304,9 +304,11 @@ void env_relocate_spec (void)
crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
if(!crc1_ok && !crc2_ok)
if(!crc1_ok && !crc2_ok) {
free(tmp_env1);
free(tmp_env2);
return use_default();
else if(crc1_ok && !crc2_ok)
} else if(crc1_ok && !crc2_ok)
gd->env_valid = 1;
else if(!crc1_ok && crc2_ok)
gd->env_valid = 2;

4
drivers/mtd/nand/nand.c
View File

@ -28,6 +28,8 @@
#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
#endif
DECLARE_GLOBAL_DATA_PTR;
int nand_curr_device = -1;
nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
@ -46,6 +48,8 @@ static void nand_init_chip(struct mtd_info *mtd, struct nand_chip *nand,
if (nand_scan(mtd, 1) == 0) {
if (!mtd->name)
mtd->name = (char *)default_nand_name;
else
mtd->name += gd->reloc_off;
} else
mtd->name = NULL;
} else {

21
drivers/mtd/nand/nand_base.c
View File

@ -75,6 +75,17 @@
#include <jffs2/jffs2.h>
#endif
/*
* CONFIG_SYS_NAND_RESET_CNT is used as a timeout mechanism when resetting
* a flash. NAND flash is initialized prior to interrupts so standard timers
* can't be used. CONFIG_SYS_NAND_RESET_CNT should be set to a value
* which is greater than (max NAND reset time / NAND status read time).
* A conservative default of 200000 (500 us / 25 ns) is used as a default.
*/
#ifndef CONFIG_SYS_NAND_RESET_CNT
#define CONFIG_SYS_NAND_RESET_CNT 200000
#endif
/* Define default oob placement schemes for large and small page devices */
static struct nand_ecclayout nand_oob_8 = {
.eccbytes = 3,
@ -524,6 +535,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command,
{
register struct nand_chip *chip = mtd->priv;
int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE;
uint32_t rst_sts_cnt = CONFIG_SYS_NAND_RESET_CNT;
/*
* Write out the command to the device.
@ -590,7 +602,8 @@ static void nand_command(struct mtd_info *mtd, unsigned int command,
NAND_CTRL_CLE | NAND_CTRL_CHANGE);
chip->cmd_ctrl(mtd,
NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
while (!(chip->read_byte(mtd) & NAND_STATUS_READY) &&
(rst_sts_cnt--));
return;
/* This applies to read commands */
@ -626,6 +639,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
register struct nand_chip *chip = mtd->priv;
uint32_t rst_sts_cnt = CONFIG_SYS_NAND_RESET_CNT;
/* Emulate NAND_CMD_READOOB */
if (command == NAND_CMD_READOOB) {
@ -696,7 +710,8 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
chip->cmd_ctrl(mtd, NAND_CMD_NONE,
NAND_NCE | NAND_CTRL_CHANGE);
while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
while (!(chip->read_byte(mtd) & NAND_STATUS_READY) &&
(rst_sts_cnt--));
return;
case NAND_CMD_RNDOUT:
@ -2618,7 +2633,9 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips)
type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id);
if (IS_ERR(type)) {
#ifndef CONFIG_SYS_NAND_QUIET_TEST
printk(KERN_WARNING "No NAND device found!!!\n");
#endif
chip->select_chip(mtd, -1);
return PTR_ERR(type);
}