Add new MTD partition driver, which can be useful with mtdblock driver combination.
Signed-off-by: Alexey Romanov avromanov@salutedevices.com --- disk/part.c | 3 +- drivers/mtd/Kconfig | 1 + drivers/mtd/mtdpart.c | 76 +++++++++++++++++++++++++++++++++++++++++++ include/part.h | 3 ++ 4 files changed, 82 insertions(+), 1 deletion(-)
diff --git a/disk/part.c b/disk/part.c index bc932526f9..86f669926e 100644 --- a/disk/part.c +++ b/disk/part.c @@ -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 */ diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index 4fdc9645d0..e4e29e0a3c 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -2,6 +2,7 @@ menu "MTD Support"
config MTD_PARTITIONS bool + select PARTITIONS
config MTD bool "Enable MTD layer" diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index be1d19b4ff..88094b81e7 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -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, +}; diff --git a/include/part.h b/include/part.h index 32ee404885..40419fdf2f 100644 --- a/include/part.h +++ b/include/part.h @@ -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 */