[][MT7981][SPIM NAND][Add fudanmicro spi nand support]
[Description]
Add fudanmicro spi nand support
[Release-log]
N/A
Change-Id: If9c3c456996d936588e2b0cb7dd042c251186fbd
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8569855
diff --git a/21.02/files/target/linux/mediatek/patches-5.4/999-2344-mtd-spinand-Add-support-fudanmicro.patch b/21.02/files/target/linux/mediatek/patches-5.4/999-2344-mtd-spinand-Add-support-fudanmicro.patch
new file mode 100644
index 0000000..34d249e
--- /dev/null
+++ b/21.02/files/target/linux/mediatek/patches-5.4/999-2344-mtd-spinand-Add-support-fudanmicro.patch
@@ -0,0 +1,141 @@
+Index: linux-5.4.260/drivers/mtd/nand/spi/core.c
+===================================================================
+--- linux-5.4.260.orig/drivers/mtd/nand/spi/core.c
++++ linux-5.4.260/drivers/mtd/nand/spi/core.c
+@@ -755,6 +755,7 @@ static const struct nand_ops spinand_ops
+
+ static const struct spinand_manufacturer *spinand_manufacturers[] = {
+ &etron_spinand_manufacturer,
++ &fudan_spinand_manufacturer,
+ &gigadevice_spinand_manufacturer,
+ ¯onix_spinand_manufacturer,
+ µn_spinand_manufacturer,
+Index: linux-5.4.260/drivers/mtd/nand/spi/Makefile
+===================================================================
+--- linux-5.4.260.orig/drivers/mtd/nand/spi/Makefile
++++ linux-5.4.260/drivers/mtd/nand/spi/Makefile
+@@ -1,3 +1,3 @@
+ # SPDX-License-Identifier: GPL-2.0
+-spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o etron.o
++spinand-objs := core.o etron.o fudanmicro.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o
+ obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
+Index: linux-5.4.260/include/linux/mtd/spinand.h
+===================================================================
+--- linux-5.4.260.orig/include/linux/mtd/spinand.h
++++ linux-5.4.260/include/linux/mtd/spinand.h
+@@ -239,6 +239,7 @@ struct spinand_manufacturer {
+
+ /* SPI NAND manufacturers */
+ extern const struct spinand_manufacturer etron_spinand_manufacturer;
++extern const struct spinand_manufacturer fudan_spinand_manufacturer;
+ extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
+ extern const struct spinand_manufacturer macronix_spinand_manufacturer;
+ extern const struct spinand_manufacturer micron_spinand_manufacturer;
+Index: linux-5.4.260/drivers/mtd/nand/spi/fudanmicro.c
+===================================================================
+--- /dev/null
++++ linux-5.4.260/drivers/mtd/nand/spi/fudanmicro.c
+@@ -0,0 +1,103 @@
++#include <linux/device.h>
++#include <linux/kernel.h>
++#include <linux/mtd/spinand.h>
++
++#define SPINAND_MFR_FUDAN 0xA1
++
++#define FM25S01B_STATUS_ECC_MASK (7 << 4)
++#define STATUS_ECC_1_3_BITFLIPS (1 << 4)
++#define STATUS_ECC_4_6_BITFLIPS (3 << 4)
++#define STATUS_ECC_7_8_BITFLIPS (5 << 4)
++
++static SPINAND_OP_VARIANTS(read_cache_variants,
++ SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
++ SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
++ SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
++ SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
++
++static SPINAND_OP_VARIANTS(write_cache_variants,
++ SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
++ SPINAND_PROG_LOAD(true, 0, NULL, 0));
++
++static SPINAND_OP_VARIANTS(update_cache_variants,
++ SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
++ SPINAND_PROG_LOAD(false, 0, NULL, 0));
++
++static int fm25s01b_ooblayout_ecc(struct mtd_info *mtd, int section,
++ struct mtd_oob_region *region)
++{
++ if (section)
++ return -ERANGE;
++
++ region->offset = 64;
++ region->length = 64;
++
++ return 0;
++}
++
++static int fm25s01b_ooblayout_free(struct mtd_info *mtd, int section,
++ struct mtd_oob_region *region)
++{
++ if (section > 3)
++ return -ERANGE;
++
++ region->offset = (16 * section) + 4;
++ region->length = 12;
++
++ return 0;
++}
++
++static const struct mtd_ooblayout_ops fm25s01b_ooblayout = {
++ .ecc = fm25s01b_ooblayout_ecc,
++ .free = fm25s01b_ooblayout_free,
++};
++
++static int fm25s01b_ecc_get_status(struct spinand_device *spinand,
++ u8 status)
++{
++ switch (status & FM25S01B_STATUS_ECC_MASK) {
++ case STATUS_ECC_NO_BITFLIPS:
++ return 0;
++
++ case STATUS_ECC_UNCOR_ERROR:
++ return -EBADMSG;
++
++ case STATUS_ECC_1_3_BITFLIPS:
++ return 3;
++
++ case STATUS_ECC_4_6_BITFLIPS:
++ return 6;
++
++ case STATUS_ECC_7_8_BITFLIPS:
++ return 8;
++
++ default:
++ break;
++ }
++
++ return -EINVAL;
++}
++
++static const struct spinand_info fudan_spinand_table[] = {
++ 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,
++ &write_cache_variants,
++ &update_cache_variants),
++ SPINAND_HAS_QE_BIT,
++ SPINAND_ECCINFO(&fm25s01b_ooblayout,
++ fm25s01b_ecc_get_status)),
++};
++
++static const struct spinand_manufacturer_ops fudan_spinand_manuf_ops = {
++};
++
++const struct spinand_manufacturer fudan_spinand_manufacturer = {
++ .id = SPINAND_MFR_FUDAN,
++ .name = "FUDAN Micron",
++ .chips = fudan_spinand_table,
++ .nchips = ARRAY_SIZE(fudan_spinand_table),
++ .ops = &fudan_spinand_manuf_ops,
++};