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| author | Clemens Gruber <clemens.gruber@pqgruber.com> | 2016-01-20 15:43:37 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-01-25 10:39:46 -0500 |
| commit | e92029c0f4e88ae3e738d83b25ef2d3c178ea082 (patch) | |
| tree | 47c75b3703273754457fd16793f039abce4378b1 | |
| parent | 0080931abfec5c25f76683e5b96b483416bd14f2 (diff) | |
| download | u-boot-imx-e92029c0f4e88ae3e738d83b25ef2d3c178ea082.zip u-boot-imx-e92029c0f4e88ae3e738d83b25ef2d3c178ea082.tar.gz u-boot-imx-e92029c0f4e88ae3e738d83b25ef2d3c178ea082.tar.bz2 | |
env_mmc: support overriding mmc dev from board code
This enables boards to choose where to/from the environment should be
saved/loaded. They can then for example support using the same device
(dynamically) from which the bootloader was launched to load and save
env data and do not have to define CONFIG_SYS_MMC_ENV_DEV statically.
In my use case, the environment needs to be on the same device I
booted from. It can be the eMMC or an optional SD card.
I therefore would override mmc_get_env_dev in the board code, read the
CPU registers to determine where we booted from and return the
corresponding device index.
Cc: Tom Rini <trini@konsulko.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
| -rw-r--r-- | common/env_mmc.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/common/env_mmc.c b/common/env_mmc.c index 15aa43d..bdb452e 100644 --- a/common/env_mmc.c +++ b/common/env_mmc.c @@ -54,6 +54,11 @@ __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr) return 0; } +__weak int mmc_get_env_dev(void) +{ + return CONFIG_SYS_MMC_ENV_DEV; +} + int env_init(void) { /* use default */ @@ -74,7 +79,7 @@ static unsigned char env_mmc_orig_hwpart; static int mmc_set_env_part(struct mmc *mmc) { uint part = mmc_get_env_part(mmc); - int dev = CONFIG_SYS_MMC_ENV_DEV; + int dev = mmc_get_env_dev(); int ret = 0; #ifdef CONFIG_SPL_BUILD @@ -109,7 +114,7 @@ static const char *init_mmc_for_env(struct mmc *mmc) static void fini_mmc_for_env(struct mmc *mmc) { #ifdef CONFIG_SYS_MMC_ENV_PART - int dev = CONFIG_SYS_MMC_ENV_DEV; + int dev = mmc_get_env_dev(); #ifdef CONFIG_SPL_BUILD dev = 0; @@ -140,7 +145,8 @@ static unsigned char env_flags; int saveenv(void) { ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); - struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV); + int dev = mmc_get_env_dev(); + struct mmc *mmc = find_mmc_device(dev); u32 offset; int ret, copy = 0; const char *errmsg; @@ -167,8 +173,7 @@ int saveenv(void) goto fini; } - printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", - CONFIG_SYS_MMC_ENV_DEV); + printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev); if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) { puts("failed\n"); ret = 1; @@ -212,7 +217,7 @@ void env_relocate_spec(void) int crc1_ok = 0, crc2_ok = 0; env_t *ep; int ret; - int dev = CONFIG_SYS_MMC_ENV_DEV; + int dev = mmc_get_env_dev(); const char *errmsg = NULL; ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1); @@ -298,7 +303,7 @@ void env_relocate_spec(void) struct mmc *mmc; u32 offset; int ret; - int dev = CONFIG_SYS_MMC_ENV_DEV; + int dev = mmc_get_env_dev(); const char *errmsg; #ifdef CONFIG_SPL_BUILD |