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authorAidan MacDonald <aidanmacdonald.0x0@gmail.com>2022-06-04 13:32:50 +0200
committerMiquel Raynal <miquel.raynal@bootlin.com>2022-06-06 15:05:33 +0200
commitfc602b4f692cb83c937b5f79628bca32b60c4402 (patch)
treea97539b207ca7d56c3363ebbd6ff10608f53c3c5 /drivers/mtd
parentdt-bindings: mtd: mxc-nand: Drop undocumented properties from example (diff)
downloadlinux-fc602b4f692cb83c937b5f79628bca32b60c4402.tar.xz
linux-fc602b4f692cb83c937b5f79628bca32b60c4402.zip
mtd: spinand: Add support for ATO25D1GA
Add support for the ATO25D1GA SPI NAND flash. Datasheet: - https://atta.szlcsc.com/upload/public/pdf/source/20191212/C469320_04599D67B03B078044EB65FF5AEDDDE9.pdf Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220604113250.4745-1-aidanmacdonald.0x0@gmail.com
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/spi/Makefile2
-rw-r--r--drivers/mtd/nand/spi/ato.c86
-rw-r--r--drivers/mtd/nand/spi/core.c1
3 files changed, 88 insertions, 1 deletions
diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index 80dabe6ff0f3..b520fe634041 100644
--- a/drivers/mtd/nand/spi/Makefile
+++ b/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 xtx.o
+spinand-objs := core.o ato.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
diff --git a/drivers/mtd/nand/spi/ato.c b/drivers/mtd/nand/spi/ato.c
new file mode 100644
index 000000000000..82b377c06812
--- /dev/null
+++ b/drivers/mtd/nand/spi/ato.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022 Aidan MacDonald
+ *
+ * Author: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+
+#define SPINAND_MFR_ATO 0x9b
+
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+ SPINAND_PAGE_READ_FROM_CACHE_X4_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 ato25d1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ if (section > 3)
+ return -ERANGE;
+
+ region->offset = (16 * section) + 8;
+ region->length = 8;
+ return 0;
+}
+
+static int ato25d1ga_ooblayout_free(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ if (section > 3)
+ return -ERANGE;
+
+ if (section) {
+ region->offset = (16 * section);
+ region->length = 8;
+ } else {
+ /* first byte of section 0 is reserved for the BBM */
+ region->offset = 1;
+ region->length = 7;
+ }
+
+ return 0;
+}
+
+static const struct mtd_ooblayout_ops ato25d1ga_ooblayout = {
+ .ecc = ato25d1ga_ooblayout_ecc,
+ .free = ato25d1ga_ooblayout_free,
+};
+
+
+static const struct spinand_info ato_spinand_table[] = {
+ SPINAND_INFO("ATO25D1GA",
+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x12),
+ 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),
+ SPINAND_HAS_QE_BIT,
+ SPINAND_ECCINFO(&ato25d1ga_ooblayout, NULL)),
+};
+
+static const struct spinand_manufacturer_ops ato_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer ato_spinand_manufacturer = {
+ .id = SPINAND_MFR_ATO,
+ .name = "ATO",
+ .chips = ato_spinand_table,
+ .nchips = ARRAY_SIZE(ato_spinand_table),
+ .ops = &ato_spinand_manuf_ops,
+};
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index d5b685d1605e..9d73910a7ae8 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -927,6 +927,7 @@ static const struct nand_ops spinand_ops = {
};
static const struct spinand_manufacturer *spinand_manufacturers[] = {
+ &ato_spinand_manufacturer,
&gigadevice_spinand_manufacturer,
&macronix_spinand_manufacturer,
&micron_spinand_manufacturer,