env: fat: allow to dynamically set storage interface

Add support for setting the FAT env storage interface dynamically by
defining board's own env_fat_get_interface() function.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: I80eef53b9adff942524061c5a8be1bb583fea21f

diff --git a/env/fat.c b/env/fat.c
index 9d37d26..0d96485 100644 (file)
--- a/env/fat.c
+++ b/env/fat.c
@@ -32,14 +32,19 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static char *env_fat_device_and_part(void)
+__weak char *env_fat_get_interface(void)
+{
+       return CONFIG_ENV_FAT_INTERFACE;
+}
+
+static char *env_fat_device_and_part(char *interface)
 {
 #ifdef CONFIG_MMC
        static char *part_str;
 
        if (!part_str) {
                part_str = CONFIG_ENV_FAT_DEVICE_AND_PART;
-               if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') {
+               if (!strcmp(interface, "mmc") && part_str[0] == ':') {
                        part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART;
                        part_str[0] += mmc_get_env_dev();
                }
@@ -57,6 +62,7 @@ static int env_fat_save(void)
        struct blk_desc *dev_desc = NULL;
        struct disk_partition info;
        const char *file = CONFIG_ENV_FAT_FILE;
+       char *interface;
        int dev, part;
        int err;
        loff_t size;
@@ -65,8 +71,9 @@ static int env_fat_save(void)
        if (err)
                return err;
 
-       part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
-                                       env_fat_device_and_part(),
+       interface = env_fat_get_interface();
+       part = blk_get_device_part_str(interface,
+                                       env_fat_device_and_part(interface),
                                        &dev_desc, &info, 1);
        if (part < 0)
                return 1;
@@ -77,8 +84,7 @@ static int env_fat_save(void)
                 * This printf is embedded in the messages from env_save that
                 * will calling it. The missing \n is intentional.
                 */
-               printf("Unable to use %s %d:%d... ",
-                      CONFIG_ENV_FAT_INTERFACE, dev, part);
+               printf("Unable to use %s %d:%d... ", interface, dev, part);
                return 1;
        }
 
@@ -94,7 +100,7 @@ static int env_fat_save(void)
                 * will calling it. The missing \n is intentional.
                 */
                printf("Unable to write \"%s\" from %s%d:%d... ",
-                       file, CONFIG_ENV_FAT_INTERFACE, dev, part);
+                       file, interface, dev, part);
                return 1;
        }
 
@@ -115,16 +121,19 @@ static int env_fat_load(void)
 #endif
        struct blk_desc *dev_desc = NULL;
        struct disk_partition info;
+       char *interface;
        int dev, part;
        int err1;
 
+       interface = env_fat_get_interface();
+
 #ifdef CONFIG_MMC
-       if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
+       if (!strcmp(interface, "mmc"))
                mmc_initialize(NULL);
 #endif
 
-       part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
-                                       env_fat_device_and_part(),
+       part = blk_get_device_part_str(interface,
+                                       env_fat_device_and_part(interface),
                                        &dev_desc, &info, 1);
        if (part < 0)
                goto err_env_relocate;
@@ -135,8 +144,7 @@ static int env_fat_load(void)
                 * This printf is embedded in the messages from env_save that
                 * will calling it. The missing \n is intentional.
                 */
-               printf("Unable to use %s %d:%d... ",
-                      CONFIG_ENV_FAT_INTERFACE, dev, part);
+               printf("Unable to use %s %d:%d... ", interface, dev, part);
                goto err_env_relocate;
        }
 
@@ -154,7 +162,7 @@ static int env_fat_load(void)
                 * will calling it. The missing \n is intentional.
                 */
                printf("Unable to read \"%s\" from %s%d:%d... ",
-                       CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
+                       CONFIG_ENV_FAT_FILE, interface, dev, part);
                goto err_env_relocate;
        }