[PATCH 1/7] cmd: bcb: Extract '__bcb_load' from 'do_bcb_load' for internal needs

[Roman Kovalivskyi]

From: Eugeniu Rosca <erosca at de.adit-jv.com>

Enriching the functionality of U-Boot 'bcb' may assume using the
existing sub-commands as building blocks for the next ones.

A clean way to achive the above is to expose a number of static
routines, each mapped to an existing user command (e.g. load/set/store),
with a user/caller-friendly prototype (i.e. do not force the caller
to wrap an integer into a string).

This first patch makes '__bcb_load' available for internal needs.

No functional change, except for a tiny update in error handling.

Signed-off-by: Eugeniu Rosca <erosca at de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi at globallogic.com>
---
 cmd/bcb.c | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/cmd/bcb.c b/cmd/bcb.c
index e03218066bf2..2ed8b801a3e2 100644
--- a/cmd/bcb.c
+++ b/cmd/bcb.c
@@ -110,8 +110,7 @@ static int bcb_field_get(char *name, char **fieldp, int *sizep)
 	return 0;
 }
 
-static int do_bcb_load(struct cmd_tbl *cmdtp, int flag, int argc,
-		       char *const argv[])
+static int __bcb_load(int devnum, const char *partp)
 {
 	struct blk_desc *desc;
 	struct disk_partition info;
@@ -119,17 +118,19 @@ static int do_bcb_load(struct cmd_tbl *cmdtp, int flag, int argc,
 	char *endp;
 	int part, ret;
 
-	ret = blk_get_device_by_str("mmc", argv[1], &desc);
-	if (ret < 0)
+	desc = blk_get_devnum_by_type(IF_TYPE_MMC, devnum);
+	if (!desc) {
+		ret = -ENODEV;
 		goto err_read_fail;
+	}
 
-	part = simple_strtoul(argv[2], &endp, 0);
+	part = simple_strtoul(partp, &endp, 0);
 	if (*endp == '\0') {
 		ret = part_get_info(desc, part, &info);
 		if (ret)
 			goto err_read_fail;
 	} else {
-		part = part_get_info_by_name(desc, argv[2], &info);
+		part = part_get_info_by_name(desc, partp, &info);
 		if (part < 0) {
 			ret = part;
 			goto err_read_fail;
@@ -151,10 +152,10 @@ static int do_bcb_load(struct cmd_tbl *cmdtp, int flag, int argc,
 
 	return CMD_RET_SUCCESS;
 err_read_fail:
-	printf("Error: mmc %s:%s read failed (%d)\n", argv[1], argv[2], ret);
+	printf("Error: mmc %d:%s read failed (%d)\n", devnum, partp, ret);
 	goto err;
 err_too_small:
-	printf("Error: mmc %s:%s too small!", argv[1], argv[2]);
+	printf("Error: mmc %d:%s too small!", devnum, partp);
 	goto err;
 err:
 	bcb_dev = -1;
@@ -163,6 +164,20 @@ err:
 	return CMD_RET_FAILURE;
 }
 
+static int do_bcb_load(struct cmd_tbl *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	char *endp;
+	int devnum = simple_strtoul(argv[1], &endp, 0);
+
+	if (*endp != '\0') {
+		printf("Error: Device id '%s' not a number\n", argv[1]);
+		return CMD_RET_FAILURE;
+	}
+
+	return __bcb_load(devnum, argv[2]);
+}
+
 static int do_bcb_set(struct cmd_tbl *cmdtp, int flag, int argc,
 		      char *const argv[])
 {
-- 
2.17.1