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disk: support MTD partitions

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Add new MTD partition driver, which can be useful with
mtdblock driver combination.

Signed-off-by: Alexey Romanov <avromanov@salutedevices.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
This commit is contained in:
Alexey Romanov 2024-07-18 08:46:04 +03:00 • committed by Michael Trimarchi
parent b7d5ce05b1
commit c29a6daec1
4 changed files with 82 additions and 1 deletions
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3
disk/part.c
View file

@ -304,7 +304,8 @@ static void print_part_header(const char *type, struct blk_desc *desc)
CONFIG_IS_ENABLED(DOS_PARTITION) || \
CONFIG_IS_ENABLED(ISO_PARTITION) || \
CONFIG_IS_ENABLED(AMIGA_PARTITION) || \
CONFIG_IS_ENABLED(EFI_PARTITION)
CONFIG_IS_ENABLED(EFI_PARTITION) || \
CONFIG_IS_ENABLED(MTD_PARTITIONS)
printf("\nPartition Map for %s device %d -- Partition Type: %s\n\n",
uclass_get_name(desc->uclass_id), desc->devnum, type);
#endif /* any CONFIG_..._PARTITION */

1
drivers/mtd/Kconfig
View file

@ -2,6 +2,7 @@ menu "MTD Support"
config MTD_PARTITIONS
bool
select PARTITIONS
config MTD
bool "Enable MTD layer"

76
drivers/mtd/mtdpart.c
View file

@ -20,6 +20,8 @@
#endif
#include <malloc.h>
#include <memalign.h>
#include <part.h>
#include <linux/bug.h>
#include <linux/errno.h>
#include <linux/compat.h>
@ -1054,3 +1056,77 @@ uint64_t mtd_get_device_size(const struct mtd_info *mtd)
return mtd->size;
}
EXPORT_SYMBOL_GPL(mtd_get_device_size);
static struct mtd_info *mtd_get_partition_by_index(struct mtd_info *mtd, int index)
{
struct mtd_info *part;
int i = 0;
list_for_each_entry(part, &mtd->partitions, node)
if (i++ == index)
return part;
debug("Partition with idx=%d not found on MTD device %s\n", index, mtd->name);
return NULL;
}
static int __maybe_unused part_get_info_mtd(struct blk_desc *dev_desc, int part_idx,
struct disk_partition *info)
{
struct mtd_info *master = blk_desc_to_mtd(dev_desc);
struct mtd_info *part;
if (!master) {
debug("MTD device is NULL\n");
return -EINVAL;
}
part = mtd_get_partition_by_index(master, part_idx);
if (!part) {
debug("Failed to find partition with idx=%d\n", part_idx);
return -EINVAL;
}
snprintf(info->name, PART_NAME_LEN, part->name);
info->start = part->offset / dev_desc->blksz;
info->size = part->size / dev_desc->blksz;
info->blksz = dev_desc->blksz;
return 0;
}
static void __maybe_unused part_print_mtd(struct blk_desc *dev_desc)
{
struct mtd_info *master = blk_desc_to_mtd(dev_desc);
struct mtd_info *part;
if (!master)
return;
list_for_each_entry(part, &master->partitions, node)
printf("- 0x%012llx-0x%012llx : \"%s\"\n",
part->offset, part->offset + part->size, part->name);
}
static int part_test_mtd(struct blk_desc *dev_desc)
{
struct mtd_info *master = blk_desc_to_mtd(dev_desc);
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
if (!master)
return -1;
if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
return -1;
return 0;
}
U_BOOT_PART_TYPE(mtd) = {
.name = "MTD",
.part_type = PART_TYPE_MTD,
.max_entries = MTD_ENTRY_NUMBERS,
.get_info = part_get_info_ptr(part_get_info_mtd),
.print = part_print_ptr(part_print_mtd),
.test = part_test_mtd,
};

3
include/part.h
View file

@ -30,12 +30,15 @@ struct block_drvr {
#define PART_TYPE_ISO 0x03
#define PART_TYPE_AMIGA 0x04
#define PART_TYPE_EFI 0x05
#define PART_TYPE_MTD 0x06
/* maximum number of partition entries supported by search */
#define DOS_ENTRY_NUMBERS 8
#define ISO_ENTRY_NUMBERS 64
#define MAC_ENTRY_NUMBERS 64
#define AMIGA_ENTRY_NUMBERS 8
#define MTD_ENTRY_NUMBERS 64
/*
* Type string for U-Boot bootable partitions
*/