[U-Boot] [PATCH v4 23/25] cmd: nand/sf: isolate legacy code

[Miquel Raynal <miquel.raynal@bootlin.com>]

The 'sf' command is not supposed to rely on the MTD stack, but both
'sf' and 'nand' commands use helpers located in mtd_uboot.c. Despite
their location, these functions do not depend at all on the MTD
stack.

This file (drivers/mtd/mtd_uboot.c) is only compiled if CONFIG_MTD is
selected, which is inconsistent with the current situation. Solve this
by moving these three functions (which are only used by the above two
commands) out of mtd_uboot.c and put them in a C file only compiled
with cmd/sf.c and cmd/nand.c.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 cmd/Makefile            |  3 ++
 cmd/legacy-mtd-utils.c  | 99 +++++++++++++++++++++++++++++++++++++++++
 cmd/legacy-mtd-utils.h  | 14 ++++++
 cmd/nand.c              |  2 +
 cmd/sf.c                |  2 +
 drivers/mtd/mtd_uboot.c | 94 --------------------------------------
 include/linux/mtd/mtd.h |  6 ---
 7 files changed, 120 insertions(+), 100 deletions(-)
 create mode 100644 cmd/legacy-mtd-utils.c
 create mode 100644 cmd/legacy-mtd-utils.h

diff --git a/cmd/Makefile b/cmd/Makefile
index 0534ddc679..d04bc44198 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -94,6 +94,9 @@ obj-$(CONFIG_CMD_MMC_SPI) += mmc_spi.o
 obj-$(CONFIG_MP) += mp.o
 obj-$(CONFIG_CMD_MTD) += mtd.o
 obj-$(CONFIG_CMD_MTDPARTS) += mtdparts.o
+ifneq ($(CONFIG_CMD_NAND)$(CONFIG_CMD_SF),)
+obj-y += legacy-mtd-utils.o
+endif
 obj-$(CONFIG_CMD_NAND) += nand.o
 obj-$(CONFIG_CMD_NET) += net.o
 obj-$(CONFIG_CMD_ONENAND) += onenand.o
diff --git a/cmd/legacy-mtd-utils.c b/cmd/legacy-mtd-utils.c
new file mode 100644
index 0000000000..1aa3bfc8ec
--- /dev/null
+++ b/cmd/legacy-mtd-utils.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <jffs2/jffs2.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/string.h>
+#include <mtd.h>
+
+int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
+	     loff_t *maxsize, int devtype)
+{
+#ifdef CONFIG_CMD_MTDPARTS
+	struct mtd_device *dev;
+	struct part_info *part;
+	u8 pnum;
+	int ret;
+
+	ret = mtdparts_init();
+	if (ret)
+		return ret;
+
+	ret = find_dev_and_part(partname, &dev, &pnum, &part);
+	if (ret)
+		return ret;
+
+	if (dev->id->type != devtype) {
+		printf("not same typ %d != %d\n", dev->id->type, devtype);
+		return -1;
+	}
+
+	*off = part->offset;
+	*size = part->size;
+	*maxsize = part->size;
+	*idx = dev->id->num;
+
+	return 0;
+#else
+	puts("mtdparts support missing.\n");
+	return -1;
+#endif
+}
+
+int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
+		loff_t *maxsize, int devtype, uint64_t chipsize)
+{
+	if (!str2off(arg, off))
+		return get_part(arg, idx, off, size, maxsize, devtype);
+
+	if (*off >= chipsize) {
+		puts("Offset exceeds device limit\n");
+		return -1;
+	}
+
+	*maxsize = chipsize - *off;
+	*size = *maxsize;
+	return 0;
+}
+
+int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
+		     loff_t *size, loff_t *maxsize, int devtype,
+		     uint64_t chipsize)
+{
+	int ret;
+
+	if (argc == 0) {
+		*off = 0;
+		*size = chipsize;
+		*maxsize = *size;
+		goto print;
+	}
+
+	ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
+			  chipsize);
+	if (ret)
+		return ret;
+
+	if (argc == 1)
+		goto print;
+
+	if (!str2off(argv[1], size)) {
+		printf("'%s' is not a number\n", argv[1]);
+		return -1;
+	}
+
+	if (*size > *maxsize) {
+		puts("Size exceeds partition or device limit\n");
+		return -1;
+	}
+
+print:
+	printf("device %d ", *idx);
+	if (*size == chipsize)
+		puts("whole chip\n");
+	else
+		printf("offset 0x%llx, size 0x%llx\n",
+		       (unsigned long long)*off, (unsigned long long)*size);
+	return 0;
+}
diff --git a/cmd/legacy-mtd-utils.h b/cmd/legacy-mtd-utils.h
new file mode 100644
index 0000000000..b31342bcb7
--- /dev/null
+++ b/cmd/legacy-mtd-utils.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __LEGACY_MTD_UTILS_H
+#define __LEGACY_MTD_UTILS_H
+
+int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
+	     loff_t *maxsize, int devtype);
+int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
+		loff_t *maxsize, int devtype, uint64_t chipsize);
+int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
+		     loff_t *size, loff_t *maxsize, int devtype,
+		     uint64_t chipsize);
+
+#endif /* LEGACY_MTD_UTILS_H */
diff --git a/cmd/nand.c b/cmd/nand.c
index a22945d144..018c8a7758 100644
--- a/cmd/nand.c
+++ b/cmd/nand.c
@@ -29,6 +29,8 @@
 #include <jffs2/jffs2.h>
 #include <nand.h>
 
+#include "legacy-mtd-utils.h"
+
 #if defined(CONFIG_CMD_MTDPARTS)
 
 /* partition handling routines */
diff --git a/cmd/sf.c b/cmd/sf.c
index 84bb0575f2..3fe906fa3b 100644
--- a/cmd/sf.c
+++ b/cmd/sf.c
@@ -18,6 +18,8 @@
 #include <asm/io.h>
 #include <dm/device-internal.h>
 
+#include "legacy-mtd-utils.h"
+
 static struct spi_flash *flash;
 
 /*
diff --git a/drivers/mtd/mtd_uboot.c b/drivers/mtd/mtd_uboot.c
index cce162461b..6123752a65 100644
--- a/drivers/mtd/mtd_uboot.c
+++ b/drivers/mtd/mtd_uboot.c
@@ -6,7 +6,6 @@
 #include <common.h>
 #include <dm/device.h>
 #include <dm/uclass-internal.h>
-#include <jffs2/jffs2.h> /* LEGACY */
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <mtd.h>
@@ -291,96 +290,3 @@ int mtd_probe_devices(void)
 	return 0;
 }
 #endif /* defined(CONFIG_MTD_PARTITIONS) */
-
-/* Legacy */
-
-static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
-		loff_t *maxsize, int devtype)
-{
-#ifdef CONFIG_CMD_MTDPARTS
-	struct mtd_device *dev;
-	struct part_info *part;
-	u8 pnum;
-	int ret;
-
-	ret = mtdparts_init();
-	if (ret)
-		return ret;
-
-	ret = find_dev_and_part(partname, &dev, &pnum, &part);
-	if (ret)
-		return ret;
-
-	if (dev->id->type != devtype) {
-		printf("not same typ %d != %d\n", dev->id->type, devtype);
-		return -1;
-	}
-
-	*off = part->offset;
-	*size = part->size;
-	*maxsize = part->size;
-	*idx = dev->id->num;
-
-	return 0;
-#else
-	puts("mtdparts support missing.\n");
-	return -1;
-#endif
-}
-
-int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
-		loff_t *maxsize, int devtype, uint64_t chipsize)
-{
-	if (!str2off(arg, off))
-		return get_part(arg, idx, off, size, maxsize, devtype);
-
-	if (*off >= chipsize) {
-		puts("Offset exceeds device limit\n");
-		return -1;
-	}
-
-	*maxsize = chipsize - *off;
-	*size = *maxsize;
-	return 0;
-}
-
-int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
-		     loff_t *size, loff_t *maxsize, int devtype,
-		     uint64_t chipsize)
-{
-	int ret;
-
-	if (argc == 0) {
-		*off = 0;
-		*size = chipsize;
-		*maxsize = *size;
-		goto print;
-	}
-
-	ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
-			  chipsize);
-	if (ret)
-		return ret;
-
-	if (argc == 1)
-		goto print;
-
-	if (!str2off(argv[1], size)) {
-		printf("'%s' is not a number\n", argv[1]);
-		return -1;
-	}
-
-	if (*size > *maxsize) {
-		puts("Size exceeds partition or device limit\n");
-		return -1;
-	}
-
-print:
-	printf("device %d ", *idx);
-	if (*size == chipsize)
-		puts("whole chip\n");
-	else
-		printf("offset 0x%llx, size 0x%llx\n",
-		       (unsigned long long)*off, (unsigned long long)*size);
-	return 0;
-}
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 68e5915324..e844ce4cb6 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -571,12 +571,6 @@ struct mtd_info *__mtd_next_device(int i);
 	     (mtd) != NULL;				\
 	     (mtd) = __mtd_next_device(mtd->index + 1))
 
-int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
-		loff_t *maxsize, int devtype, uint64_t chipsize);
-int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
-		     loff_t *size, loff_t *maxsize, int devtype,
-		     uint64_t chipsize);
-
 /* drivers/mtd/mtdcore.c */
 void mtd_get_len_incl_bad(struct mtd_info *mtd, uint64_t offset,
 			  const uint64_t length, uint64_t *len_incl_bad,
-- 
2.19.1