uboot-mediatek: add support for FudanMicro FM25S01A

This patch adds support for FudanMicro FM25S01A SPI NAND. It's required
for some CMCC RAX3000Me hardware revisions.

The patch was partially taken from ImmortalWrt.
Link:
https://raw.githubusercontent.com/immortalwrt/immortalwrt/refs/heads/master/package/boot/uboot-mediatek/patches/342-mtd-spinand-Support-fmsh.patch

Signed-off-by: Mikhail Zhilkin <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19760
Signed-off-by: Hauke Mehrtens <[email protected]>

diff --git a/package/boot/uboot-mediatek/patches/110-mtd-spi-nand-add-support-for-FudanMicro-FM25S01A.patch b/package/boot/uboot-mediatek/patches/110-mtd-spi-nand-add-support-for-FudanMicro-FM25S01A.patch
new file mode 100644 (file)
index 0000000..81f116d
--- /dev/null
+++ b/package/boot/uboot-mediatek/patches/110-mtd-spi-nand-add-support-for-FudanMicro-FM25S01A.patch
@@ -0,0 +1,76 @@
+From c5b3dd3b860b7eb65950c077a70b2e5ad68626b0 Mon Sep 17 00:00:00 2001
+From: Mikhail Zhilkin <[email protected]>
+Date: Wed, 13 Aug 2025 21:54:49 +0300
+Subject: uboot-mediatek: add support for FudanMicro FM25S01A
+
+This patch adds support for FudanMicro FM25S01A SPI NAND. It's required
+for some CMCC RAX3000Me hardware revisions.
+
+The patch was partially taken from ImmortalWrt.
+Link:
+https://raw.githubusercontent.com/immortalwrt/immortalwrt/refs/heads/master/package/boot/uboot-mediatek/patches/342-mtd-spinand-Support-fmsh.patch
+
+Signed-off-by: Mikhail Zhilkin <[email protected]>
+---
+
+--- a/drivers/mtd/nand/spi/fudanmicro.c
++++ b/drivers/mtd/nand/spi/fudanmicro.c
+@@ -27,6 +27,29 @@ static SPINAND_OP_VARIANTS(update_cache_
+               SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
+               SPINAND_PROG_LOAD(false, 0, NULL, 0));
+ 
++static int fm25s01a_ooblayout_ecc(struct mtd_info *mtd, int section,
++                                struct mtd_oob_region *region)
++{
++      return -ERANGE;
++}
++
++static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
++                                 struct mtd_oob_region *region)
++{
++      if (section)
++              return -ERANGE;
++
++      region->offset = 2;
++      region->length = 62;
++
++      return 0;
++}
++
++static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
++      .ecc = fm25s01a_ooblayout_ecc,
++      .rfree = fm25s01a_ooblayout_free,
++};
++
+ static int fm25s01b_ooblayout_ecc(struct mtd_info *mtd, int section,
+                                     struct mtd_oob_region *region)
+ {
+@@ -83,8 +106,17 @@ static int fm25s01b_ecc_get_status(struc
+ }
+ 
+ static const struct spinand_info fudan_spinand_table[] = {
+-      SPINAND_INFO("FM25s01B",
+-                       SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD4),
++      SPINAND_INFO("FM25S01A",
++                   SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
++                   NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
++                   NAND_ECCREQ(1, 512),
++                   SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
++                                            &write_cache_variants,
++                                            &update_cache_variants),
++                   0,
++                   SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
++      SPINAND_INFO("FM25S01B",
++                   SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD4),
+                    NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
+                    NAND_ECCREQ(8, 512),
+                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+@@ -100,7 +132,7 @@ static const struct spinand_manufacturer
+ 
+ const struct spinand_manufacturer fudan_spinand_manufacturer = {
+       .id = SPINAND_MFR_FUDAN,
+-      .name = "FUDAN Micron",
++      .name = "FudanMicro",
+       .chips = fudan_spinand_table,
+       .nchips = ARRAY_SIZE(fudan_spinand_table),
+       .ops = &fudan_spinand_manuf_ops,