cmd: bcb: extend BCB C API to allow read/write the fields

Currently BCB C API only allows to modify 'command' BCB field.
Extend it so that we can also read and modify all the available
BCB fields (command, status, recovery, stage).

Co-developed-by: Cody Schuffelen <schuffelen@google.com>
Signed-off-by: Cody Schuffelen <schuffelen@google.com>
Signed-off-by: Dmitrii Merkurev <dimorinny@google.com>
Cc: Eugeniu Rosca <erosca@de.adit-jv.com>
Cc: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Cc: Sean Anderson <sean.anderson@seco.com>
Cc: Cody Schuffelen <schuffelen@google.com>
Tested-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> # on vim3
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

1 files changed, 57 insertions, 3 deletions

diff --git a/include/bcb.h b/include/bcb.h
index a6326523c47..1941d8c28b4 100644
--- a/include/bcb.h
+++ b/include/bcb.h
@@ -8,15 +8,69 @@
 #ifndef __BCB_H__
 #define __BCB_H__
 
+#include <part.h>
+
+enum bcb_field {
+	BCB_FIELD_COMMAND,
+	BCB_FIELD_STATUS,
+	BCB_FIELD_RECOVERY,
+	BCB_FIELD_STAGE
+};
+
 #if IS_ENABLED(CONFIG_CMD_BCB)
-int bcb_write_reboot_reason(const char *iface, int devnum, char *partp, const char *reasonp);
+
+int bcb_find_partition_and_load(const char *iface,
+				int devnum, char *partp);
+int bcb_load(struct blk_desc *block_description,
+	     struct disk_partition *disk_partition);
+int bcb_set(enum bcb_field field, const char *value);
+
+/**
+ * bcb_get() - get the field value.
+ * @field: field to get
+ * @value_out: buffer to copy bcb field value to
+ * @value_size: buffer size to avoid overflow in case
+ *              value_out is smaller then the field value
+ */
+int bcb_get(enum bcb_field field, char *value_out, size_t value_size);
+
+int bcb_store(void);
+void bcb_reset(void);
+
 #else
+
 #include <linux/errno.h>
-static inline int bcb_write_reboot_reason(const char *iface, int devnum,
-					  char *partp, const char *reasonp)
+
+static inline int bcb_load(struct blk_desc *block_description,
+			   struct disk_partition *disk_partition)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int bcb_find_partition_and_load(const char *iface,
+					      int devnum, char *partp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int bcb_set(enum bcb_field field, const char *value)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int bcb_get(enum bcb_field field, char *value_out)
 {
 	return -EOPNOTSUPP;
 }
+
+static inline int bcb_store(void)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void bcb_reset(void)
+{
+}
 #endif
 
 #endif /* __BCB_H__ */