[PATCH v1 2/2] mtd: spinand: add support for ESMT F50x1G41LB
Igor Prusov
ivprusov at salutedevices.com
Wed Oct 4 17:07:04 CEST 2023
Adaptation of Linux commit d74c36480a67
This patch adds support for ESMT F50L1G41LB and F50D1G41LB.
It seems that ESMT likes to use random JEDEC ID from other vendors.
Their 1G chips uses 0xc8 from GigaDevice and 2G/4G chips uses 0x2c from
Micron. For this reason, the ESMT entry is named esmt_c8 with explicit
JEDEC ID in variable name.
Datasheets:
https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/F50L1G41LB(2M).pdf
https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/F50D1G41LB(2M).pdf
Signed-off-by: Igor Prusov <ivprusov at salutedevices.com>
Signed-off-by: Chuanhong Guo <gch981213 at gmail.com>
Signed-off-by: Martin Kurbanov <mmkurbanov at sberdevices.ru>
Signed-off-by: Dmitry Rokosov <ddrokosov at sberdevices.ru>
Tested-by: Martin Kurbanov <mmkurbanov at sberdevices.ru>
---
drivers/mtd/nand/spi/Makefile | 2 +-
drivers/mtd/nand/spi/core.c | 1 +
drivers/mtd/nand/spi/esmt.c | 137 ++++++++++++++++++++++++++++++++++
include/linux/mtd/spinand.h | 1 +
4 files changed, 140 insertions(+), 1 deletion(-)
create mode 100644 drivers/mtd/nand/spi/esmt.c
diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index 6c65b187e8..0585fe8e67 100644
--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,4 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
-spinand-objs := core.o gigadevice.o macronix.o micron.o toshiba.o winbond.o
+spinand-objs := core.o gigadevice.o macronix.o micron.o toshiba.o winbond.o esmt.o
obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 3ea746fd13..b84df30bff 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -837,6 +837,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = {
µn_spinand_manufacturer,
&toshiba_spinand_manufacturer,
&winbond_spinand_manufacturer,
+ &esmt_c8_spinand_manufacturer,
};
static int spinand_manufacturer_match(struct spinand_device *spinand,
diff --git a/drivers/mtd/nand/spi/esmt.c b/drivers/mtd/nand/spi/esmt.c
new file mode 100644
index 0000000000..6dacb8d981
--- /dev/null
+++ b/drivers/mtd/nand/spi/esmt.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Author:
+ * Chuanhong Guo <gch981213 at gmail.com> - the main driver logic
+ * Martin Kurbanov <mmkurbanov at sberdevices.ru> - OOB layout
+ */
+
+#ifndef __UBOOT__
+#include <linux/device.h>
+#include <linux/kernel.h>
+#endif
+#include <linux/mtd/spinand.h>
+
+/* ESMT uses GigaDevice 0xc8 JECDEC ID on some SPI NANDs */
+#define SPINAND_MFR_ESMT_C8 0xc8
+
+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));
+
+/*
+ * OOB spare area map (64 bytes)
+ *
+ * Bad Block Markers
+ * filled by HW and kernel Reserved
+ * | +-----------------------+-----------------------+
+ * | | | |
+ * | | OOB free data Area |non ECC protected |
+ * | +-------------|-----+-----------------|-----+-----------------|-----+
+ * | | | | | | | |
+ * +-|---|----------+--|-----|--------------+--|-----|--------------+--|-----|--------------+
+ * | | | section0 | | | section1 | | | section2 | | | section3 |
+ * +-v-+-v-+---+----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+
+ * | | | | | | | | | | | | | | | | |
+ * |0:1|2:3|4:7|8:15|16:17|18:19|20:23|24:31|32:33|34:35|36:39|40:47|48:49|50:51|52:55|56:63|
+ * | | | | | | | | | | | | | | | | |
+ * +---+---+-^-+--^-+-----+-----+--^--+--^--+-----+-----+--^--+--^--+-----+-----+--^--+--^--+
+ * | | | | | | | |
+ * | +----------------|-----+-----------------|-----+-----------------|-----+
+ * | ECC Area|(Main + Spare) - filled|by ESMT NAND HW |
+ * | | | |
+ * +---------------------+-----------------------+-----------------------+
+ * OOB ECC protected Area - not used due to
+ * partial programming from some filesystems
+ * (like JFFS2 with cleanmarkers)
+ */
+
+#define ESMT_OOB_SECTION_COUNT 4
+#define ESMT_OOB_SECTION_SIZE(nand) \
+ (nanddev_per_page_oobsize(nand) / ESMT_OOB_SECTION_COUNT)
+#define ESMT_OOB_FREE_SIZE(nand) \
+ (ESMT_OOB_SECTION_SIZE(nand) / 2)
+#define ESMT_OOB_ECC_SIZE(nand) \
+ (ESMT_OOB_SECTION_SIZE(nand) - ESMT_OOB_FREE_SIZE(nand))
+#define ESMT_OOB_BBM_SIZE 2
+
+static int f50l1g41lb_ooblayout_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+
+ if (section >= ESMT_OOB_SECTION_COUNT)
+ return -ERANGE;
+
+ region->offset = section * ESMT_OOB_SECTION_SIZE(nand) +
+ ESMT_OOB_FREE_SIZE(nand);
+ region->length = ESMT_OOB_ECC_SIZE(nand);
+
+ return 0;
+}
+
+static int f50l1g41lb_ooblayout_free(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+
+ if (section >= ESMT_OOB_SECTION_COUNT)
+ return -ERANGE;
+
+ /*
+ * Reserve space for bad blocks markers (section0) and
+ * reserved bytes (sections 1-3)
+ */
+ region->offset = section * ESMT_OOB_SECTION_SIZE(nand) + 2;
+
+ /* Use only 2 non-protected ECC bytes per each OOB section */
+ region->length = 2;
+
+ return 0;
+}
+
+static const struct mtd_ooblayout_ops f50l1g41lb_ooblayout = {
+ .ecc = f50l1g41lb_ooblayout_ecc,
+ .rfree = f50l1g41lb_ooblayout_free,
+};
+
+static const struct spinand_info esmt_c8_spinand_table[] = {
+ SPINAND_INFO("F50L1G41LB",
+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x01),
+ NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
+ NAND_ECCREQ(1, 512),
+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ 0,
+ SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
+ SPINAND_INFO("F50D1G41LB",
+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x11),
+ NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
+ NAND_ECCREQ(1, 512),
+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ 0,
+ SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
+};
+
+static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer esmt_c8_spinand_manufacturer = {
+ .id = SPINAND_MFR_ESMT_C8,
+ .name = "ESMT",
+ .chips = esmt_c8_spinand_table,
+ .nchips = ARRAY_SIZE(esmt_c8_spinand_table),
+ .ops = &esmt_spinand_manuf_ops,
+};
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 3a2d55ac45..85c273a1e4 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -220,6 +220,7 @@ extern const struct spinand_manufacturer macronix_spinand_manufacturer;
extern const struct spinand_manufacturer micron_spinand_manufacturer;
extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
extern const struct spinand_manufacturer winbond_spinand_manufacturer;
+extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
/**
* struct spinand_op_variants - SPI NAND operation variants
--
2.34.1
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