mtd: spinand: Add initial support for Paragon PN26G0xA

Add initial support for Paragon Technology
PN26G01Axxxxx and PN26G02Axxxxx SPI NAND

Datasheets available at
http://www.xtxtech.com/upfile/2016082517274590.pdf
http://www.xtxtech.com/upfile/2016082517282329.pdf

Signed-off-by: Jeff Kletsky <git-commits@allycomm.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index 7531250..9662b9c 100644 (file)
--- 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 toshiba.o winbond.o
+spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.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 556bfdb..f0f3528 100644 (file)
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -757,6 +757,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = {
        &gigadevice_spinand_manufacturer,
        &macronix_spinand_manufacturer,
        &micron_spinand_manufacturer,
+       &paragon_spinand_manufacturer,
        &toshiba_spinand_manufacturer,
        &winbond_spinand_manufacturer,
 };

diff --git a/drivers/mtd/nand/spi/paragon.c b/drivers/mtd/nand/spi/paragon.c
new file mode 100644 (file)
index 0000000..5230768
--- /dev/null
+++ b/drivers/mtd/nand/spi/paragon.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Jeff Kletsky
+ *
+ * Author: Jeff Kletsky <git-commits@allycomm.com>
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+
+#define SPINAND_MFR_PARAGON    0xa1
+
+
+#define PN26G0XA_STATUS_ECC_BITMASK            (3 << 4)
+
+#define PN26G0XA_STATUS_ECC_NONE_DETECTED      (0 << 4)
+#define PN26G0XA_STATUS_ECC_1_7_CORRECTED      (1 << 4)
+#define PN26G0XA_STATUS_ECC_ERRORED            (2 << 4)
+#define PN26G0XA_STATUS_ECC_8_CORRECTED                (3 << 4)
+
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+               SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, 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 pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,
+                                  struct mtd_oob_region *region)
+{
+       if (section > 3)
+               return -ERANGE;
+
+       region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */
+       region->length = 13;
+
+       return 0;
+}
+
+static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section,
+                                  struct mtd_oob_region *region)
+{
+       if (section > 4)
+               return -ERANGE;
+
+       if (section == 4) {
+               region->offset = 64;
+               region->length = 64;
+       } else {
+               region->offset = 4 + (15 * section);
+               region->length = 2;
+       }
+
+       return 0;
+}
+
+static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,
+                                  u8 status)
+{
+       switch (status & PN26G0XA_STATUS_ECC_BITMASK) {
+       case PN26G0XA_STATUS_ECC_NONE_DETECTED:
+               return 0;
+
+       case PN26G0XA_STATUS_ECC_1_7_CORRECTED:
+               return 7;       /* Return upper limit by convention */
+
+       case PN26G0XA_STATUS_ECC_8_CORRECTED:
+               return 8;
+
+       case PN26G0XA_STATUS_ECC_ERRORED:
+               return -EBADMSG;
+
+       default:
+               break;
+       }
+
+       return -EINVAL;
+}
+
+static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {
+       .ecc = pn26g0xa_ooblayout_ecc,
+       .free = pn26g0xa_ooblayout_free,
+};
+
+
+static const struct spinand_info paragon_spinand_table[] = {
+       SPINAND_INFO("PN26G01A", 0xe1,
+                    NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1),
+                    NAND_ECCREQ(8, 512),
+                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+                                             &write_cache_variants,
+                                             &update_cache_variants),
+                    0,
+                    SPINAND_ECCINFO(&pn26g0xa_ooblayout,
+                                    pn26g0xa_ecc_get_status)),
+       SPINAND_INFO("PN26G02A", 0xe2,
+                    NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1),
+                    NAND_ECCREQ(8, 512),
+                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+                                             &write_cache_variants,
+                                             &update_cache_variants),
+                    0,
+                    SPINAND_ECCINFO(&pn26g0xa_ooblayout,
+                                    pn26g0xa_ecc_get_status)),
+};
+
+static int paragon_spinand_detect(struct spinand_device *spinand)
+{
+       u8 *id = spinand->id.data;
+       int ret;
+
+       /* Read ID returns [0][MID][DID] */
+
+       if (id[1] != SPINAND_MFR_PARAGON)
+               return 0;
+
+       ret = spinand_match_and_init(spinand, paragon_spinand_table,
+                                    ARRAY_SIZE(paragon_spinand_table),
+                                    id[2]);
+       if (ret)
+               return ret;
+
+       return 1;
+}
+
+static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {
+       .detect = paragon_spinand_detect,
+};
+
+const struct spinand_manufacturer paragon_spinand_manufacturer = {
+       .id = SPINAND_MFR_PARAGON,
+       .name = "Paragon",
+       .ops = &paragon_spinand_manuf_ops,
+};

diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index fbc0423..4ea558b 100644 (file)
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -227,6 +227,7 @@ struct 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;
+extern const struct spinand_manufacturer paragon_spinand_manufacturer;
 extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
 extern const struct spinand_manufacturer winbond_spinand_manufacturer;