diff options
Diffstat (limited to 'target/linux/generic/backport-4.19/451-v5.0-mtd-spinand-Add-initial-support-for-Toshiba-TC58CVG2.patch')
| -rw-r--r-- | target/linux/generic/backport-4.19/451-v5.0-mtd-spinand-Add-initial-support-for-Toshiba-TC58CVG2.patch | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/target/linux/generic/backport-4.19/451-v5.0-mtd-spinand-Add-initial-support-for-Toshiba-TC58CVG2.patch b/target/linux/generic/backport-4.19/451-v5.0-mtd-spinand-Add-initial-support-for-Toshiba-TC58CVG2.patch deleted file mode 100644 index 288fdbf267..0000000000 --- a/target/linux/generic/backport-4.19/451-v5.0-mtd-spinand-Add-initial-support-for-Toshiba-TC58CVG2.patch +++ /dev/null @@ -1,188 +0,0 @@ -From 10949af1681d5bb5cdbcc012815c6e40eec17d02 Mon Sep 17 00:00:00 2001 -From: Schrempf Frieder <frieder.schrempf@kontron.De> -Date: Thu, 8 Nov 2018 08:32:11 +0000 -Subject: [PATCH 2/8] mtd: spinand: Add initial support for Toshiba TC58CVG2S0H -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Add minimal support for the Toshiba TC58CVG2S0H SPI NAND chip. - -Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> -Acked-by: Clément Péron <peron.clem@gmail.com> -Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> ---- - drivers/mtd/nand/spi/Makefile | 2 +- - drivers/mtd/nand/spi/core.c | 1 + - drivers/mtd/nand/spi/toshiba.c | 137 +++++++++++++++++++++++++++++++++ - include/linux/mtd/spinand.h | 1 + - 4 files changed, 140 insertions(+), 1 deletion(-) - create mode 100644 drivers/mtd/nand/spi/toshiba.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 macronix.o micron.o winbond.o -+spinand-objs := core.o macronix.o micron.o toshiba.o winbond.o - obj-$(CONFIG_MTD_SPI_NAND) += spinand.o ---- a/drivers/mtd/nand/spi/core.c -+++ b/drivers/mtd/nand/spi/core.c -@@ -762,6 +762,7 @@ static const struct nand_ops spinand_ops - static const struct spinand_manufacturer *spinand_manufacturers[] = { - ¯onix_spinand_manufacturer, - µn_spinand_manufacturer, -+ &toshiba_spinand_manufacturer, - &winbond_spinand_manufacturer, - }; - ---- /dev/null -+++ b/drivers/mtd/nand/spi/toshiba.c -@@ -0,0 +1,137 @@ -+// SPDX-License-Identifier: GPL-2.0 -+/* -+ * Copyright (c) 2018 exceet electronics GmbH -+ * Copyright (c) 2018 Kontron Electronics GmbH -+ * -+ * Author: Frieder Schrempf <frieder.schrempf@kontron.de> -+ */ -+ -+#include <linux/device.h> -+#include <linux/kernel.h> -+#include <linux/mtd/spinand.h> -+ -+#define SPINAND_MFR_TOSHIBA 0x98 -+#define TOSH_STATUS_ECC_HAS_BITFLIPS_T (3 << 4) -+ -+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(true, 0, NULL, 0)); -+ -+static SPINAND_OP_VARIANTS(update_cache_variants, -+ SPINAND_PROG_LOAD(false, 0, NULL, 0)); -+ -+static int tc58cvg2s0h_ooblayout_ecc(struct mtd_info *mtd, int section, -+ struct mtd_oob_region *region) -+{ -+ if (section > 7) -+ return -ERANGE; -+ -+ region->offset = 128 + 16 * section; -+ region->length = 16; -+ -+ return 0; -+} -+ -+static int tc58cvg2s0h_ooblayout_free(struct mtd_info *mtd, int section, -+ struct mtd_oob_region *region) -+{ -+ if (section > 0) -+ return -ERANGE; -+ -+ /* 2 bytes reserved for BBM */ -+ region->offset = 2; -+ region->length = 126; -+ -+ return 0; -+} -+ -+static const struct mtd_ooblayout_ops tc58cvg2s0h_ooblayout = { -+ .ecc = tc58cvg2s0h_ooblayout_ecc, -+ .free = tc58cvg2s0h_ooblayout_free, -+}; -+ -+static int tc58cvg2s0h_ecc_get_status(struct spinand_device *spinand, -+ u8 status) -+{ -+ struct nand_device *nand = spinand_to_nand(spinand); -+ u8 mbf = 0; -+ struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf); -+ -+ switch (status & STATUS_ECC_MASK) { -+ case STATUS_ECC_NO_BITFLIPS: -+ return 0; -+ -+ case STATUS_ECC_UNCOR_ERROR: -+ return -EBADMSG; -+ -+ case STATUS_ECC_HAS_BITFLIPS: -+ case TOSH_STATUS_ECC_HAS_BITFLIPS_T: -+ /* -+ * Let's try to retrieve the real maximum number of bitflips -+ * in order to avoid forcing the wear-leveling layer to move -+ * data around if it's not necessary. -+ */ -+ if (spi_mem_exec_op(spinand->spimem, &op)) -+ return nand->eccreq.strength; -+ -+ mbf >>= 4; -+ -+ if (WARN_ON(mbf > nand->eccreq.strength || !mbf)) -+ return nand->eccreq.strength; -+ -+ return mbf; -+ -+ default: -+ break; -+ } -+ -+ return -EINVAL; -+} -+ -+static const struct spinand_info toshiba_spinand_table[] = { -+ SPINAND_INFO("TC58CVG2S0H", 0xCD, -+ NAND_MEMORG(1, 4096, 256, 64, 2048, 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(&tc58cvg2s0h_ooblayout, -+ tc58cvg2s0h_ecc_get_status)), -+}; -+ -+static int toshiba_spinand_detect(struct spinand_device *spinand) -+{ -+ u8 *id = spinand->id.data; -+ int ret; -+ -+ /* -+ * Toshiba SPI NAND read ID needs a dummy byte, -+ * so the first byte in id is garbage. -+ */ -+ if (id[1] != SPINAND_MFR_TOSHIBA) -+ return 0; -+ -+ ret = spinand_match_and_init(spinand, toshiba_spinand_table, -+ ARRAY_SIZE(toshiba_spinand_table), -+ id[2]); -+ if (ret) -+ return ret; -+ -+ return 1; -+} -+ -+static const struct spinand_manufacturer_ops toshiba_spinand_manuf_ops = { -+ .detect = toshiba_spinand_detect, -+}; -+ -+const struct spinand_manufacturer toshiba_spinand_manufacturer = { -+ .id = SPINAND_MFR_TOSHIBA, -+ .name = "Toshiba", -+ .ops = &toshiba_spinand_manuf_ops, -+}; ---- a/include/linux/mtd/spinand.h -+++ b/include/linux/mtd/spinand.h -@@ -196,6 +196,7 @@ struct spinand_manufacturer { - /* SPI NAND manufacturers */ - 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; - - /** |