From: Mingkai Hu Mingkai.hu@freescale.com
On some boards the environment may not be located at a fixed address in the MMC/SDHC card. This allows those boards to implement their own means to report what address the environment is located at.
Signed-off-by: Mingkai Hu Mingkai.hu@freescale.com Signed-off-by: Jerry Huang Chang-Ming.Huang@freescale.com Signed-off-by: Zhao Chenhui b35336@freescale.com Signed-off-by: Kumar Gala galak@kernel.crashing.org --- common/env_mmc.c | 31 +++++++++++++++++++++++++++---- 1 files changed, 27 insertions(+), 4 deletions(-)
diff --git a/common/env_mmc.c b/common/env_mmc.c index 71dcc4c..83f40f4 100644 --- a/common/env_mmc.c +++ b/common/env_mmc.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2008-2010 Freescale Semiconductor, Inc. + * (C) Copyright 2008-2011 Freescale Semiconductor, Inc. * * See file CREDITS for list of people who contributed to this * project. @@ -51,6 +51,19 @@ static void use_default(void);
DECLARE_GLOBAL_DATA_PTR;
+#if !defined(CONFIG_ENV_OFFSET) +#define CONFIG_ENV_OFFSET 0 +#endif + +static int __mmc_get_env_addr(struct mmc *mmc, u32 *env_addr) +{ + *env_addr = CONFIG_ENV_OFFSET; + return 0; +} +__attribute__((weak, alias("__mmc_get_env_addr"))) +int mmc_get_env_addr(struct mmc *mmc, u32 *env_addr); + + uchar env_get_char_spec(int index) { return *((uchar *)(gd->env_addr + index)); @@ -102,10 +115,14 @@ int saveenv(void) ssize_t len; char *res; struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV); + u32 offset;
if (init_mmc_for_env(mmc)) return 1;
+ if(mmc_get_env_addr(mmc, &offset)) + return 1; + res = (char *)&env_new.data; len = hexport_r(&env_htab, '\0', &res, ENV_SIZE); if (len < 0) { @@ -114,7 +131,7 @@ int saveenv(void) } env_new.crc = crc32(0, env_new.data, ENV_SIZE); printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV); - if (write_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)&env_new)) { + if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)&env_new)) { puts("failed\n"); return 1; } @@ -141,16 +158,22 @@ inline int read_env(struct mmc *mmc, unsigned long size, void env_relocate_spec(void) { #if !defined(ENV_IS_EMBEDDED) - char buf[CONFIG_ENV_SIZE]; + char buf[CONFIG_ENV_SIZE];
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV); + u32 offset;
if (init_mmc_for_env(mmc)) { use_default(); return; }
- if (read_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) { + if(mmc_get_env_addr(mmc, &offset)) { + use_default(); + return ; + } + + if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) { use_default(); return; }