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authorStuart Wood <stuart.wood@labxtechnologies.com>2008-05-30 16:05:28 -0400
committerScott Wood <scottwood@freescale.com>2008-06-06 11:06:45 -0500
commitcc49cadeeb8bb2f0ae3fdc13af7051ae59f083bc (patch)
treec431dc6f62c5b5c5c133d26b7464d09621c46afe /common/env_nand.c
parent8155efbd7ae9c65564ca98affe94631d612ae088 (diff)
downloadu-boot-linaro-natty-cc49cadeeb8bb2f0ae3fdc13af7051ae59f083bc.tar.gz
env_nand.c: Added bad block management for environment variables
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>
Diffstat (limited to 'common/env_nand.c')
-rw-r--r--common/env_nand.c119
1 files changed, 99 insertions, 20 deletions
diff --git a/common/env_nand.c b/common/env_nand.c
index 3a98d2b94..a48e98e50 100644
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -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();