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authorBo Shen <voice.shen@atmel.com>2013-10-08 16:30:21 +0800
committerTom Rini <trini@ti.com>2013-10-14 16:06:52 -0400
commitcca2011e62289063066faee3cf8e3d74685be8fc (patch)
treec5da820fbf3f16697802c33f9c9494a42ecd5542 /common
parent47a4bea6af77b01d59a410d09a4c34b2dd14cf50 (diff)
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env: dataflash: fix env_init issue
As the SPI controller is not initialized before env_init(), it causes reading env in dataflash failed. So, although saveenv() successfully, it shows warning information when reboot the system as following: *** Warning - bad CRC, using default environment Let the env_relocate() to check env CRC and import it. Signed-off-by: Bo Shen <voice.shen@atmel.com>
Diffstat (limited to 'common')
-rw-r--r--common/env_dataflash.c50
1 files changed, 18 insertions, 32 deletions
diff --git a/common/env_dataflash.c b/common/env_dataflash.c
index 5f21d5c..b53b87e 100644
--- a/common/env_dataflash.c
+++ b/common/env_dataflash.c
@@ -29,11 +29,25 @@ uchar env_get_char_spec(int index)
void env_relocate_spec(void)
{
+ ulong crc, new = 0;
+ unsigned off;
char buf[CONFIG_ENV_SIZE];
+ /* Read old CRC */
+ read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc),
+ sizeof(ulong), (char *)&crc);
+
+ /* Read whole environment */
read_dataflash(CONFIG_ENV_ADDR, CONFIG_ENV_SIZE, buf);
- env_import(buf, 1);
+ /* Calculate the CRC */
+ off = offsetof(env_t, data);
+ new = crc32(new, (unsigned char *)(buf + off), ENV_SIZE);
+
+ if (crc == new)
+ env_import(buf, 1);
+ else
+ set_default_env("!bad CRC");
}
#ifdef CONFIG_ENV_OFFSET_REDUND
@@ -67,37 +81,9 @@ int saveenv(void)
*/
int env_init(void)
{
- ulong crc, len = ENV_SIZE, new = 0;
- unsigned off;
- uchar buf[64];
-
- if (gd->env_valid)
- return 0;
-
- AT91F_DataflashInit(); /* prepare for DATAFLASH read/write */
-
- /* read old CRC */
- read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc),
- sizeof(ulong), (char *)&crc);
-
- off = offsetof(env_t, data);
- while (len > 0) {
- int n = (len > sizeof(buf)) ? sizeof(buf) : len;
-
- read_dataflash(CONFIG_ENV_ADDR + off, n, (char *)buf);
-
- new = crc32(new, buf, n);
- len -= n;
- off += n;
- }
-
- if (crc == new) {
- gd->env_addr = offsetof(env_t, data);
- gd->env_valid = 1;
- } else {
- gd->env_addr = (ulong)&default_environment[0];
- gd->env_valid = 0;
- }
+ /* use default */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
return 0;
}