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, 188 insertions, 0 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 new file mode 100644 index 0000000000..ed42f0024b --- /dev/null +++ b/target/linux/generic/backport-4.19/451-v5.0-mtd-spinand-Add-initial-support-for-Toshiba-TC58CVG2.patch @@ -0,0 +1,188 @@ +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 +@@ -764,6 +764,7 @@ 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; + + /** |