Add minimal support for the MX35LF1GE4AB SPI NAND chip. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Acked-by: Jagan Teki <jagan@openedev.com>lime2-spi
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3181c0a622
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6f041ccabb
@ -1,4 +1,4 @@ |
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# SPDX-License-Identifier: GPL-2.0
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spinand-objs := core.o micron.o winbond.o
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spinand-objs := core.o macronix.o micron.o winbond.o
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obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2018 Macronix |
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* |
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* Author: Boris Brezillon <boris.brezillon@bootlin.com> |
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*/ |
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#ifndef __UBOOT__ |
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#include <linux/device.h> |
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#include <linux/kernel.h> |
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#endif |
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#include <linux/mtd/spinand.h> |
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#define SPINAND_MFR_MACRONIX 0xC2 |
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static SPINAND_OP_VARIANTS(read_cache_variants, |
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SPINAND_PAGE_READ_FROM_CACHE_X4_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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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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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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static int mx35lf1ge4ab_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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return -ERANGE; |
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} |
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static int mx35lf1ge4ab_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) |
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return -ERANGE; |
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region->offset = 2; |
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region->length = mtd->oobsize - 2; |
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return 0; |
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} |
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static const struct mtd_ooblayout_ops mx35lf1ge4ab_ooblayout = { |
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.ecc = mx35lf1ge4ab_ooblayout_ecc, |
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.free = mx35lf1ge4ab_ooblayout_free, |
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}; |
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static int mx35lf1ge4ab_get_eccsr(struct spinand_device *spinand, u8 *eccsr) |
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{ |
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struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0x7c, 1), |
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SPI_MEM_OP_NO_ADDR, |
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SPI_MEM_OP_DUMMY(1, 1), |
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SPI_MEM_OP_DATA_IN(1, eccsr, 1)); |
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return spi_mem_exec_op(spinand->slave, &op); |
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} |
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static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand, |
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u8 status) |
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{ |
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struct nand_device *nand = spinand_to_nand(spinand); |
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u8 eccsr; |
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switch (status & STATUS_ECC_MASK) { |
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case STATUS_ECC_NO_BITFLIPS: |
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return 0; |
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case STATUS_ECC_UNCOR_ERROR: |
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return -EBADMSG; |
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case STATUS_ECC_HAS_BITFLIPS: |
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/*
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* Let's try to retrieve the real maximum number of bitflips |
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* in order to avoid forcing the wear-leveling layer to move |
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* data around if it's not necessary. |
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*/ |
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if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr)) |
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return nand->eccreq.strength; |
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if (WARN_ON(eccsr > nand->eccreq.strength || !eccsr)) |
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return nand->eccreq.strength; |
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return eccsr; |
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default: |
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break; |
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} |
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return -EINVAL; |
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} |
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static const struct spinand_info macronix_spinand_table[] = { |
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SPINAND_INFO("MX35LF1GE4AB", 0x12, |
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NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1), |
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NAND_ECCREQ(4, 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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SPINAND_HAS_QE_BIT, |
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SPINAND_ECCINFO(&mx35lf1ge4ab_ooblayout, |
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mx35lf1ge4ab_ecc_get_status)), |
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}; |
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static int macronix_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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* Macronix SPI NAND read ID needs a dummy byte, so the first byte in |
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* raw_id is garbage. |
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*/ |
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if (id[1] != SPINAND_MFR_MACRONIX) |
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return 0; |
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ret = spinand_match_and_init(spinand, macronix_spinand_table, |
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ARRAY_SIZE(macronix_spinand_table), |
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id[2]); |
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if (ret) |
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return ret; |
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return 1; |
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} |
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static const struct spinand_manufacturer_ops macronix_spinand_manuf_ops = { |
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.detect = macronix_spinand_detect, |
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}; |
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const struct spinand_manufacturer macronix_spinand_manufacturer = { |
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.id = SPINAND_MFR_MACRONIX, |
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.name = "Macronix", |
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.ops = ¯onix_spinand_manuf_ops, |
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}; |
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