204 lines
5.9 KiB
Diff
204 lines
5.9 KiB
Diff
From 3552691616c940a7c4125c2678ba816653cd725e Mon Sep 17 00:00:00 2001
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From: Jeff Kletsky <git-commits@allycomm.com>
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Date: Tue, 18 Jun 2019 10:08:05 -0700
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Subject: [PATCH] mtd: spinand: Add initial support for Paragon PN26G0xA
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Add initial support for Paragon Technology
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PN26G01Axxxxx and PN26G02Axxxxx SPI NAND
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Datasheets available at
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http://www.xtxtech.com/upfile/2016082517274590.pdf
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http://www.xtxtech.com/upfile/2016082517282329.pdf
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Signed-off-by: Jeff Kletsky <git-commits@allycomm.com>
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Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
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Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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ADOPTED FROM UPSTREAM due to upstream commit 377e517b5fa5 in Linux 5.2
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which added another parameter to NAND_MEMORG
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---
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drivers/mtd/nand/spi/Makefile | 2 +-
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drivers/mtd/nand/spi/core.c | 1 +
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drivers/mtd/nand/spi/paragon.c | 147 +++++++++++++++++++++++++++++++++
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include/linux/mtd/spinand.h | 1 +
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4 files changed, 150 insertions(+), 1 deletion(-)
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create mode 100644 drivers/mtd/nand/spi/paragon.c
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--- a/drivers/mtd/nand/spi/Makefile
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+++ b/drivers/mtd/nand/spi/Makefile
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@@ -1,3 +1,3 @@
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# SPDX-License-Identifier: GPL-2.0
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-spinand-objs := core.o gigadevice.o macronix.o micron.o toshiba.o winbond.o
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+spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o
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obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
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--- a/drivers/mtd/nand/spi/core.c
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+++ b/drivers/mtd/nand/spi/core.c
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@@ -763,6 +763,7 @@ static const struct spinand_manufacturer
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&gigadevice_spinand_manufacturer,
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¯onix_spinand_manufacturer,
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µn_spinand_manufacturer,
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+ ¶gon_spinand_manufacturer,
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&toshiba_spinand_manufacturer,
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&winbond_spinand_manufacturer,
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};
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--- /dev/null
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+++ b/drivers/mtd/nand/spi/paragon.c
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@@ -0,0 +1,147 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * Copyright (C) 2019 Jeff Kletsky
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+ *
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+ * Author: Jeff Kletsky <git-commits@allycomm.com>
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+ */
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+
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+#include <linux/device.h>
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+#include <linux/kernel.h>
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+#include <linux/mtd/spinand.h>
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+
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+
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+#define SPINAND_MFR_PARAGON 0xa1
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+
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+
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+#define PN26G0XA_STATUS_ECC_BITMASK (3 << 4)
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+
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+#define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4)
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+#define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4)
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+#define PN26G0XA_STATUS_ECC_ERRORED (2 << 4)
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+#define PN26G0XA_STATUS_ECC_8_CORRECTED (3 << 4)
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+
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+
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+static SPINAND_OP_VARIANTS(read_cache_variants,
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+ SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
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+
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+static SPINAND_OP_VARIANTS(write_cache_variants,
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+ SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
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+ SPINAND_PROG_LOAD(true, 0, NULL, 0));
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+
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+static SPINAND_OP_VARIANTS(update_cache_variants,
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+ SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
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+ SPINAND_PROG_LOAD(false, 0, NULL, 0));
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+
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+
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+static int pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,
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+ struct mtd_oob_region *region)
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+{
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+ if (section > 3)
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+ return -ERANGE;
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+
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+ region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */
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+ region->length = 13;
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+
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+ return 0;
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+}
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+
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+static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section,
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+ struct mtd_oob_region *region)
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+{
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+ if (section > 4)
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+ return -ERANGE;
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+
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+ if (section == 4) {
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+ region->offset = 64;
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+ region->length = 64;
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+ } else {
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+ region->offset = 4 + (15 * section);
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+ region->length = 2;
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+ }
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+
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+ return 0;
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+}
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+
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+static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,
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+ u8 status)
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+{
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+ switch (status & PN26G0XA_STATUS_ECC_BITMASK) {
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+ case PN26G0XA_STATUS_ECC_NONE_DETECTED:
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+ return 0;
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+
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+ case PN26G0XA_STATUS_ECC_1_7_CORRECTED:
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+ return 7; /* Return upper limit by convention */
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+
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+ case PN26G0XA_STATUS_ECC_8_CORRECTED:
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+ return 8;
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+
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+ case PN26G0XA_STATUS_ECC_ERRORED:
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+ return -EBADMSG;
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+
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+ default:
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+ break;
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+ }
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+
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+ return -EINVAL;
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+}
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+
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+static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {
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+ .ecc = pn26g0xa_ooblayout_ecc,
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+ .free = pn26g0xa_ooblayout_free,
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+};
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+
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+
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+static const struct spinand_info paragon_spinand_table[] = {
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+ SPINAND_INFO("PN26G01A", 0xe1,
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+ NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
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+ NAND_ECCREQ(8, 512),
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+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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+ &write_cache_variants,
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+ &update_cache_variants),
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+ 0,
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+ SPINAND_ECCINFO(&pn26g0xa_ooblayout,
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+ pn26g0xa_ecc_get_status)),
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+ SPINAND_INFO("PN26G02A", 0xe2,
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+ NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1),
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+ NAND_ECCREQ(8, 512),
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+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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+ &write_cache_variants,
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+ &update_cache_variants),
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+ 0,
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+ SPINAND_ECCINFO(&pn26g0xa_ooblayout,
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+ pn26g0xa_ecc_get_status)),
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+};
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+
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+static int paragon_spinand_detect(struct spinand_device *spinand)
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+{
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+ u8 *id = spinand->id.data;
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+ int ret;
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+
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+ /* Read ID returns [0][MID][DID] */
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+
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+ if (id[1] != SPINAND_MFR_PARAGON)
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+ return 0;
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+
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+ ret = spinand_match_and_init(spinand, paragon_spinand_table,
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+ ARRAY_SIZE(paragon_spinand_table),
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+ id[2]);
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+ if (ret)
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+ return ret;
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+
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+ return 1;
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+}
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+
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+static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {
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+ .detect = paragon_spinand_detect,
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+};
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+
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+const struct spinand_manufacturer paragon_spinand_manufacturer = {
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+ .id = SPINAND_MFR_PARAGON,
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+ .name = "Paragon",
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+ .ops = ¶gon_spinand_manuf_ops,
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+};
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--- a/include/linux/mtd/spinand.h
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+++ b/include/linux/mtd/spinand.h
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@@ -227,6 +227,7 @@ struct spinand_manufacturer {
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extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
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extern const struct spinand_manufacturer macronix_spinand_manufacturer;
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extern const struct spinand_manufacturer micron_spinand_manufacturer;
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+extern const struct spinand_manufacturer paragon_spinand_manufacturer;
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extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
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extern const struct spinand_manufacturer winbond_spinand_manufacturer;
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