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env_nand.c: Added bad block management for environment variables

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Modified to check for bad blocks and to skipping over them when
CFG_ENV_RANGE has been defined.
CFG_ENV_RANGE must be larger than CFG_ENV_SIZE and aligned to the NAND
flash block size.

Signed-off-by: Stuart Wood <stuart.wood@labxtechnologies.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Stuart Wood 2008-05-30 16:05:28 -04:00 committed by Scott Wood
parent 8155efbd7a
commit cc49cadeeb
1 changed files with 99 additions and 20 deletions
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119
common/env_nand.c
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@ -1,4 +1,7 @@
/*
* (C) Copyright 2008
* Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
*
* (C) Copyright 2004
* Jian Zhang, Texas Instruments, jzhang@ti.com.
@ -53,6 +56,10 @@
#error CONFIG_INFERNO not supported yet
#endif
#ifndef CFG_ENV_RANGE
#define CFG_ENV_RANGE CFG_ENV_SIZE
#endif
int nand_legacy_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
@ -148,35 +155,71 @@ int env_init(void)
* The legacy NAND code saved the environment in the first NAND device i.e.,
* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
*/
int writeenv(size_t offset, u_char *buf)
{
size_t end = offset + CFG_ENV_RANGE;
size_t amount_saved = 0;
size_t blocksize;
u_char *char_ptr;
blocksize = nand_info[0].erasesize;
while (amount_saved < CFG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[0], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_saved];
if (nand_write(&nand_info[0], offset, &blocksize,
char_ptr))
return 1;
offset += blocksize;
amount_saved += blocksize;
}
}
if (amount_saved != CFG_ENV_SIZE)
return 1;
return 0;
}
#ifdef CFG_ENV_OFFSET_REDUND
int saveenv(void)
{
size_t total;
int ret = 0;
nand_erase_options_t nand_erase_options;
env_ptr->flags++;
total = CFG_ENV_SIZE;
nand_erase_options.length = CFG_ENV_RANGE;
nand_erase_options.quiet = 0;
nand_erase_options.jffs2 = 0;
nand_erase_options.scrub = 0;
if (CFG_ENV_RANGE < CFG_ENV_SIZE)
return 1;
if(gd->env_valid == 1) {
puts ("Erasing redundant Nand...");
if (nand_erase(&nand_info[0],
CFG_ENV_OFFSET_REDUND, CFG_ENV_SIZE))
puts ("Erasing redundant Nand...\n");
nand_erase_options.offset = CFG_ENV_OFFSET_REDUND;
if (nand_erase_opts(&nand_info[0], &nand_erase_options))
return 1;
puts ("Writing to redundant Nand... ");
ret = nand_write(&nand_info[0], CFG_ENV_OFFSET_REDUND, &total,
(u_char*) env_ptr);
ret = writeenv(CFG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
} else {
puts ("Erasing Nand...");
if (nand_erase(&nand_info[0],
CFG_ENV_OFFSET, CFG_ENV_SIZE))
puts ("Erasing Nand...\n");
nand_erase_options.offset = CFG_ENV_OFFSET;
if (nand_erase_opts(&nand_info[0], &nand_erase_options))
return 1;
puts ("Writing to Nand... ");
ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total,
(u_char*) env_ptr);
ret = writeenv(CFG_ENV_OFFSET, (u_char *) env_ptr);
}
if (ret || total != CFG_ENV_SIZE)
if (ret) {
puts("FAILED!\n");
return 1;
}
puts ("done\n");
gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
@ -188,15 +231,24 @@ int saveenv(void)
size_t total;
int ret = 0;
puts ("Erasing Nand...");
if (nand_erase(&nand_info[0], CFG_ENV_OFFSET, CFG_ENV_SIZE))
nand_erase_options.length = CFG_ENV_RANGE;
nand_erase_options.quiet = 0;
nand_erase_options.jffs2 = 0;
nand_erase_options.scrub = 0;
nand_erase_options.offset = CFG_ENV_OFFSET;
if (CFG_ENV_RANGE < CFG_ENV_SIZE)
return 1;
puts ("Erasing Nand...\n");
if (nand_erase_opts(&nand_info[0], &nand_erase_options))
return 1;
puts ("Writing to Nand... ");
total = CFG_ENV_SIZE;
ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
if (ret || total != CFG_ENV_SIZE)
if (writeenv(CFG_ENV_OFFSET, env_ptr)) {
puts("FAILED!\n");
return 1;
}
puts ("done\n");
return ret;
@ -204,6 +256,33 @@ int saveenv(void)
#endif /* CFG_ENV_OFFSET_REDUND */
#endif /* CMD_SAVEENV */
int readenv (size_t offset, u_char * buf)
{
size_t end = offset + CFG_ENV_RANGE;
size_t amount_loaded = 0;
size_t blocksize;
u_char *char_ptr;
blocksize = nand_info[0].erasesize;
while (amount_loaded < CFG_ENV_SIZE && offset < end) {
if (nand_block_isbad(&nand_info[0], offset)) {
offset += blocksize;
} else {
char_ptr = &buf[amount_loaded];
if (nand_read(&nand_info[0], offset, &blocksize, char_ptr))
return 1;
offset += blocksize;
amount_loaded += blocksize;
}
}
if (amount_loaded != CFG_ENV_SIZE)
return 1;
return 0;
}
#ifdef CFG_ENV_OFFSET_REDUND
void env_relocate_spec (void)
{
@ -217,10 +296,10 @@ void env_relocate_spec (void)
tmp_env1 = (env_t *) malloc(CFG_ENV_SIZE);
tmp_env2 = (env_t *) malloc(CFG_ENV_SIZE);
nand_read(&nand_info[0], CFG_ENV_OFFSET, &total,
(u_char*) tmp_env1);
nand_read(&nand_info[0], CFG_ENV_OFFSET_REDUND, &total,
(u_char*) tmp_env2);
if (readenv(CFG_ENV_OFFSET, (u_char *) tmp_env1))
puts("No Valid Environment Area Found\n");
if (readenv(CFG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
puts("No Valid Reundant Environment Area Found\n");
crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
@ -269,7 +348,7 @@ void env_relocate_spec (void)
int ret;
total = CFG_ENV_SIZE;
ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
ret = readenv(CFG_ENV_OFFSET, env_ptr);
if (ret || total != CFG_ENV_SIZE)
return use_default();