+++ /dev/null
-From 8ffe91b6b429277bd7bd79267ba836edf951dce2 Mon Sep 17 00:00:00 2001
-From: Felix Matouschek <felix@matouschek.org>
-Date: Fri, 2 Jul 2021 20:31:23 +0200
-Subject: [PATCH] mtd: spinand: Add support for XTX XT26G0xA
-
-Add support for XTX Technology XT26G01AXXXXX, XTX26G02AXXXXX and
-XTX26G04AXXXXX SPI NAND.
-
-These are 3V, 1G/2G/4Gbit serial SLC NAND flash devices with on-die ECC
-(8bit strength per 512bytes).
-
-Tested on Teltonika RUTX10 flashed with OpenWrt.
-
-Datasheets available at
-http://www.xtxtech.com/download/?AId=225
-https://datasheet.lcsc.com/szlcsc/2005251034_XTX-XT26G01AWSEGA_C558841.pdf
-
-Signed-off-by: Felix Matouschek <felix@matouschek.org>
----
- drivers/mtd/nand/spi/Makefile | 2 +-
- drivers/mtd/nand/spi/core.c | 1 +
- drivers/mtd/nand/spi/xtx.c | 139 ++++++++++++++++++++++++++++++++++
- include/linux/mtd/spinand.h | 1 +
- 4 files changed, 142 insertions(+), 1 deletion(-)
- create mode 100644 drivers/mtd/nand/spi/xtx.c
-
---- 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
-+spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
- obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
---- a/drivers/mtd/nand/spi/core.c
-+++ b/drivers/mtd/nand/spi/core.c
-@@ -758,6 +758,7 @@ static const struct spinand_manufacturer
- ¶gon_spinand_manufacturer,
- &toshiba_spinand_manufacturer,
- &winbond_spinand_manufacturer,
-+ &xtx_spinand_manufacturer,
- };
-
- static int spinand_manufacturer_detect(struct spinand_device *spinand)
---- /dev/null
-+++ b/drivers/mtd/nand/spi/xtx.c
-@@ -0,0 +1,139 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Author:
-+ * Felix Matouschek <felix@matouschek.org>
-+ */
-+
-+#include <linux/device.h>
-+#include <linux/kernel.h>
-+#include <linux/mtd/spinand.h>
-+
-+#define SPINAND_MFR_XTX 0x0B
-+
-+#define XT26G0XA_STATUS_ECC_MASK GENMASK(5, 2)
-+#define XT26G0XA_STATUS_ECC_NO_DETECTED (0 << 2)
-+#define XT26G0XA_STATUS_ECC_8_CORRECTED (3 << 4)
-+#define XT26G0XA_STATUS_ECC_UNCOR_ERROR (2 << 4)
-+
-+static SPINAND_OP_VARIANTS(read_cache_variants,
-+ SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, NULL, 0),
-+ SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
-+ SPINAND_PAGE_READ_FROM_CACHE_DUALIO_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 xt26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,
-+ struct mtd_oob_region *region)
-+{
-+ if (section)
-+ return -ERANGE;
-+
-+ region->offset = 8;
-+ region->length = 40;
-+
-+ return 0;
-+}
-+
-+static int xt26g0xa_ooblayout_free(struct mtd_info *mtd, int section,
-+ struct mtd_oob_region *region)
-+{
-+ if (section)
-+ return -ERANGE;
-+
-+ region->offset = 1;
-+ region->length = 7;
-+
-+ return 0;
-+}
-+
-+static const struct mtd_ooblayout_ops xt26g0xa_ooblayout = {
-+ .ecc = xt26g0xa_ooblayout_ecc,
-+ .free = xt26g0xa_ooblayout_free,
-+};
-+
-+static int xt26g0xa_ecc_get_status(struct spinand_device *spinand,
-+ u8 status)
-+{
-+ switch (status & XT26G0XA_STATUS_ECC_MASK) {
-+ case XT26G0XA_STATUS_ECC_NO_DETECTED:
-+ return 0;
-+ case XT26G0XA_STATUS_ECC_8_CORRECTED:
-+ return 8;
-+ case XT26G0XA_STATUS_ECC_UNCOR_ERROR:
-+ return -EBADMSG;
-+ default: /* (1 << 2) through (7 << 2) are 1-7 corrected errors */
-+ return (status & XT26G0XA_STATUS_ECC_MASK) >> 2;
-+ }
-+
-+ return -EINVAL;
-+}
-+
-+static const struct spinand_info xtx_spinand_table[] = {
-+ SPINAND_INFO("XT26G01A", 0xE1,
-+ NAND_MEMORG(1, 2048, 64, 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(&xt26g0xa_ooblayout,
-+ xt26g0xa_ecc_get_status)),
-+ SPINAND_INFO("XT26G02A", 0xE2,
-+ NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 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(&xt26g0xa_ooblayout,
-+ xt26g0xa_ecc_get_status)),
-+ SPINAND_INFO("XT26G04A", 0xE3,
-+ NAND_MEMORG(1, 2048, 64, 128, 2048, 40, 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(&xt26g0xa_ooblayout,
-+ xt26g0xa_ecc_get_status)),
-+};
-+
-+static int xtx_spinand_detect(struct spinand_device *spinand)
-+{
-+ u8 *id = spinand->id.data;
-+ int ret;
-+
-+ /*
-+ * XTX SPI NAND read ID needs a dummy byte, so the first byte in
-+ * raw_id is garbage.
-+ */
-+ if (id[1] != SPINAND_MFR_XTX)
-+ return 0;
-+
-+ ret = spinand_match_and_init(spinand, xtx_spinand_table,
-+ ARRAY_SIZE(xtx_spinand_table),
-+ id[2]);
-+ if (ret)
-+ return ret;
-+
-+ return 1;
-+}
-+
-+static const struct spinand_manufacturer_ops xtx_spinand_manuf_ops = {
-+ .detect = xtx_spinand_detect,
-+};
-+
-+const struct spinand_manufacturer xtx_spinand_manufacturer = {
-+ .id = SPINAND_MFR_XTX,
-+ .name = "XTX",
-+ .ops = &xtx_spinand_manuf_ops,
-+};
---- a/include/linux/mtd/spinand.h
-+++ b/include/linux/mtd/spinand.h
-@@ -230,6 +230,7 @@ extern const struct spinand_manufacturer
- extern const struct spinand_manufacturer paragon_spinand_manufacturer;
- extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
- extern const struct spinand_manufacturer winbond_spinand_manufacturer;
-+extern const struct spinand_manufacturer xtx_spinand_manufacturer;
-
- /**
- * struct spinand_op_variants - SPI NAND operation variants
projects / openwrt / openwrt.git / blobdiff