From: Dinesh Maniyam <[email protected]> Add a generic SPL NAND MTD loader providing nand_get_mtd() and nand_spl_load_image() helpers.
This allows SPL NAND MTD loading logic to be shared across NAND controllers instead of being embedded in individual drivers. Signed-off-by: Dinesh Maniyam <[email protected]> --- drivers/mtd/nand/raw/spl_nand_mtd.c | 76 +++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 drivers/mtd/nand/raw/spl_nand_mtd.c diff --git a/drivers/mtd/nand/raw/spl_nand_mtd.c b/drivers/mtd/nand/raw/spl_nand_mtd.c new file mode 100644 index 00000000000..06bd0b6ec88 --- /dev/null +++ b/drivers/mtd/nand/raw/spl_nand_mtd.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright Altera Corporation (C) 2026. All rights reserved. + */ + +#include <dm.h> +#include <hang.h> +#include <malloc.h> +#include <memalign.h> +#include <nand.h> + +struct mtd_info *nand_get_mtd(void) +{ + struct mtd_info *mtd; + + mtd = get_nand_dev_by_index(nand_curr_device); + if (!mtd) + hang(); + + return mtd; +} + +int nand_spl_load_image(u32 offset, u32 len, void *dst) +{ + size_t count = len, actual = 0, page_align_overhead = 0; + u32 page_align_offset = 0; + u8 *page_buffer = NULL; + int err = 0; + struct mtd_info *mtd; + + if (!len || !dst) + return -EINVAL; + + mtd = nand_get_mtd(); + + if (offset & (mtd->writesize - 1)) { + page_buffer = malloc_cache_aligned(mtd->writesize); + if (!page_buffer) { + debug("Error: allocating buffer\n"); + return -ENOMEM; + } + + page_align_overhead = offset % mtd->writesize; + page_align_offset = offset - page_align_overhead; + count = mtd->writesize; + + err = nand_read_skip_bad(mtd, page_align_offset, &count, + &actual, mtd->size, page_buffer); + if (err) + goto out; + + count -= page_align_overhead; + count = min((size_t)len, count); + + memcpy(dst, page_buffer + page_align_overhead, count); + + len -= count; + if (!len) + goto out; + + offset += count; + dst += count; + count = len; + } + + err = nand_read_skip_bad(mtd, offset, &count, + &actual, mtd->size, dst); + +out: + if (page_buffer) + free(page_buffer); + + return err; +} + +void nand_deselect(void) {} -- 2.43.7
