env: Switch env_nand, env_mmc and env_ubi to env_import_redund

The env_nand, env_mmc and env_ubi implementations all implement
redundancy using an identical serial-number scheme. This commit
migrates them to use the implementation in env_common, which is
functionally identical.

Signed-off-by: Fiach Antaw <fiach.antaw@uqconnect.edu.au>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/common/env_mmc.c b/common/env_mmc.c
index 88b043ec35b1bd644dd5ae85aa42ab88ba30f090..bb760a00ed82db5b563fc861437f3ae1f9aa2049 100644 (file)
--- a/common/env_mmc.c
+++ b/common/env_mmc.c
@@ -160,10 +160,6 @@ static inline int write_env(struct mmc *mmc, unsigned long size,
        return (n == blk_cnt) ? 0 : -1;
 }
 
-#ifdef CONFIG_ENV_OFFSET_REDUND
-static unsigned char env_flags;
-#endif
-
 int saveenv(void)
 {
        ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
@@ -184,8 +180,6 @@ int saveenv(void)
                goto fini;
 
 #ifdef CONFIG_ENV_OFFSET_REDUND
-       env_new->flags  = ++env_flags; /* increase the serial */
-
        if (gd->env_valid == 1)
                copy = 1;
 #endif
@@ -236,8 +230,6 @@ void env_relocate_spec(void)
        struct mmc *mmc;
        u32 offset1, offset2;
        int read1_fail = 0, read2_fail = 0;
-       int crc1_ok = 0, crc2_ok = 0;
-       env_t *ep;
        int ret;
        int dev = mmc_get_env_dev();
        const char *errmsg = NULL;
@@ -268,42 +260,20 @@ void env_relocate_spec(void)
                puts("*** Warning - some problems detected "
                     "reading environment; recovered successfully\n");
 
-       crc1_ok = !read1_fail &&
-               (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
-       crc2_ok = !read2_fail &&
-               (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
-
-       if (!crc1_ok && !crc2_ok) {
+       if (read1_fail && read2_fail) {
                errmsg = "!bad CRC";
                ret = 1;
                goto fini;
-       } else if (crc1_ok && !crc2_ok) {
+       } else if (!read1_fail && read2_fail) {
                gd->env_valid = 1;
-       } else if (!crc1_ok && crc2_ok) {
+               env_import((char *)tmp_env1, 1);
+       } else if (read1_fail && !read2_fail) {
                gd->env_valid = 2;
+               env_import((char *)tmp_env2, 1);
        } else {
-               /* both ok - check serial */
-               if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
-                       gd->env_valid = 2;
-               else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
-                       gd->env_valid = 1;
-               else if (tmp_env1->flags > tmp_env2->flags)
-                       gd->env_valid = 1;
-               else if (tmp_env2->flags > tmp_env1->flags)
-                       gd->env_valid = 2;
-               else /* flags are equal - almost impossible */
-                       gd->env_valid = 1;
+               env_import_redund((char *)tmp_env1, (char *)tmp_env2);
        }
 
-       free(env_ptr);
-
-       if (gd->env_valid == 1)
-               ep = tmp_env1;
-       else
-               ep = tmp_env2;
-
-       env_flags = ep->flags;
-       env_import((char *)ep, 0);
        ret = 0;
 
 fini:

diff --git a/common/env_nand.c b/common/env_nand.c
index 133ecfbb8e6949e5325b9af60539c7851efc6ef1..760f6859e354daeaa5299cf159f53938ae64f975 100644 (file)
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -184,10 +184,6 @@ static int erase_and_write_env(const struct env_location *location,
        return ret;
 }
 
-#ifdef CONFIG_ENV_OFFSET_REDUND
-static unsigned char env_flags;
-#endif
-
 int saveenv(void)
 {
        int     ret = 0;
@@ -221,7 +217,6 @@ int saveenv(void)
                return ret;
 
 #ifdef CONFIG_ENV_OFFSET_REDUND
-       env_new->flags = ++env_flags; /* increase the serial */
        env_idx = (gd->env_valid == 1);
 #endif
 
@@ -324,8 +319,7 @@ void env_relocate_spec(void)
 {
 #if !defined(ENV_IS_EMBEDDED)
        int read1_fail = 0, read2_fail = 0;
-       int crc1_ok = 0, crc2_ok = 0;
-       env_t *ep, *tmp_env1, *tmp_env2;
+       env_t *tmp_env1, *tmp_env2;
 
        tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
        tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
@@ -344,42 +338,19 @@ void env_relocate_spec(void)
                puts("*** Warning - some problems detected "
                     "reading environment; recovered successfully\n");
 
-       crc1_ok = !read1_fail &&
-               (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
-       crc2_ok = !read2_fail &&
-               (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
-
-       if (!crc1_ok && !crc2_ok) {
-               set_default_env("!bad CRC");
+       if (read1_fail && read2_fail) {
+               set_default_env("!bad env area");
                goto done;
-       } else if (crc1_ok && !crc2_ok) {
+       } else if (!read1_fail && read2_fail) {
                gd->env_valid = 1;
-       } else if (!crc1_ok && crc2_ok) {
+               env_import((char *)tmp_env1, 1);
+       } else if (read1_fail && !read2_fail) {
                gd->env_valid = 2;
+               env_import((char *)tmp_env2, 1);
        } else {
-               /* both ok - check serial */
-               if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
-                       gd->env_valid = 2;
-               else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
-                       gd->env_valid = 1;
-               else if (tmp_env1->flags > tmp_env2->flags)
-                       gd->env_valid = 1;
-               else if (tmp_env2->flags > tmp_env1->flags)
-                       gd->env_valid = 2;
-               else /* flags are equal - almost impossible */
-                       gd->env_valid = 1;
+               env_import_redund((char *)tmp_env1, (char *)tmp_env2);
        }
 
-       free(env_ptr);
-
-       if (gd->env_valid == 1)
-               ep = tmp_env1;
-       else
-               ep = tmp_env2;
-
-       env_flags = ep->flags;
-       env_import((char *)ep, 0);
-
 done:
        free(tmp_env1);
        free(tmp_env2);

diff --git a/common/env_ubi.c b/common/env_ubi.c
index 0ac2f65f0b24be57a7b2c123d3ef7a1faa8f0c6e..95b527ddca47c60c7dbe6a55cde935b523a1f8e0 100644 (file)
--- a/common/env_ubi.c
+++ b/common/env_ubi.c
@@ -33,8 +33,6 @@ int env_init(void)
 
 #ifdef CONFIG_CMD_SAVEENV
 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
-static unsigned char env_flags;
-
 int saveenv(void)
 {
        ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
@@ -50,8 +48,6 @@ int saveenv(void)
                return 1;
        }
 
-       env_new->flags = ++env_flags; /* increase the serial */
-
        if (gd->env_valid == 1) {
                puts("Writing to redundant UBI... ");
                if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND,
@@ -112,8 +108,7 @@ void env_relocate_spec(void)
 {
        ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE);
        ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE);
-       int crc1_ok = 0, crc2_ok = 0;
-       env_t *ep, *tmp_env1, *tmp_env2;
+       env_t *tmp_env1, *tmp_env2;
 
        /*
         * In case we have restarted u-boot there is a chance that buffer
@@ -148,37 +143,7 @@ void env_relocate_spec(void)
                       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);
        }
 
-       crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
-       crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
-
-       if (!crc1_ok && !crc2_ok) {
-               set_default_env("!bad CRC");
-               return;
-       } else if (crc1_ok && !crc2_ok) {
-               gd->env_valid = 1;
-       } else if (!crc1_ok && crc2_ok) {
-               gd->env_valid = 2;
-       } else {
-               /* both ok - check serial */
-               if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
-                       gd->env_valid = 2;
-               else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
-                       gd->env_valid = 1;
-               else if (tmp_env1->flags > tmp_env2->flags)
-                       gd->env_valid = 1;
-               else if (tmp_env2->flags > tmp_env1->flags)
-                       gd->env_valid = 2;
-               else /* flags are equal - almost impossible */
-                       gd->env_valid = 1;
-       }
-
-       if (gd->env_valid == 1)
-               ep = tmp_env1;
-       else
-               ep = tmp_env2;
-
-       env_flags = ep->flags;
-       env_import((char *)ep, 0);
+       env_import_redund((char *)tmp_env1, (char *)tmp_env2);
 }
 #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
 void env_relocate_spec(void)