From f32085fc0b87049491b07e198d924d738a1a2834 Mon Sep 17 00:00:00 2001 From: Daniel Danzberger Date: Wed, 3 Aug 2022 17:31:03 +0200 Subject: [PATCH] mtd: spinand: Add support for Etron EM73D044VCx Airoha is a new ARM platform based on Cortex-A53 which has recently been merged into linux-next. Due to BootROM limitations on this platform, the Cortex-A53 can't run in Aarch64 mode and code must be compiled for 32-Bit ARM. This support is based mostly on those linux-next commits backported for kernel 5.15. Patches: 1 - platform support = linux-next 2 - clock driver = linux-next 3 - gpio driver = linux-next 4 - linux,usable-memory-range dts support = linux-next 5 - mtd spinand driver 6 - spi driver 7 - pci driver (kconfig only, uses mediatek PCI) = linux-next Still missing: - Ethernet driver - Sysupgrade support A.t.m there exists one subtarget EN7523 with only one evaluation board. The initramfs can be run with the following commands from u-boot: - u-boot> setenv bootfile \ openwrt-airoha-airoha_en7523-evb-initramfs-kernel.bin u-boot> tftpboot u-boot> bootm 0x81800000 - Submitted-by: Daniel Danzberger --- 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 esmt.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o +spinand-objs := core.o esmt.o etron.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o obj-$(CONFIG_MTD_SPI_NAND) += spinand.o --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -908,6 +908,7 @@ static const struct nand_ops spinand_ops static const struct spinand_manufacturer *spinand_manufacturers[] = { &esmt_c8_spinand_manufacturer, &gigadevice_spinand_manufacturer, + &etron_spinand_manufacturer, ¯onix_spinand_manufacturer, µn_spinand_manufacturer, ¶gon_spinand_manufacturer, --- /dev/null +++ b/drivers/mtd/nand/spi/etron.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include + +#define SPINAND_MFR_ETRON 0xd5 + + +static SPINAND_OP_VARIANTS(read_cache_variants, + SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, 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 etron_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section) + return -ERANGE; + + oobregion->offset = 72; + oobregion->length = 56; + + return 0; +} + +static int etron_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section) + return -ERANGE; + + oobregion->offset = 1; + oobregion->length = 71; + + return 0; +} + +static int etron_ecc_get_status(struct spinand_device *spinand, u8 status) +{ + switch (status & STATUS_ECC_MASK) { + case STATUS_ECC_NO_BITFLIPS: + return 0; + + case STATUS_ECC_HAS_BITFLIPS: + /* Between 1-7 bitflips were corrected */ + return 7; + + case STATUS_ECC_MASK: + /* Maximum bitflips were corrected */ + return 8; + + case STATUS_ECC_UNCOR_ERROR: + return -EBADMSG; + } + + return -EINVAL; +} + +static const struct mtd_ooblayout_ops etron_ooblayout = { + .ecc = etron_ooblayout_ecc, + .free = etron_ooblayout_free, +}; + +static const struct spinand_info etron_spinand_table[] = { + SPINAND_INFO("EM73D044VCx", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x1f), + // bpc, pagesize, oobsize, pagesperblock, bperlun, maxbadplun, ppl, lpt, #t + NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 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(&etron_ooblayout, etron_ecc_get_status)), +}; + +static const struct spinand_manufacturer_ops etron_spinand_manuf_ops = { +}; + +const struct spinand_manufacturer etron_spinand_manufacturer = { + .id = SPINAND_MFR_ETRON, + .name = "Etron", + .chips = etron_spinand_table, + .nchips = ARRAY_SIZE(etron_spinand_table), + .ops = &etron_spinand_manuf_ops, +}; --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -261,6 +261,7 @@ struct spinand_manufacturer { /* SPI NAND manufacturers */ extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer; +extern const struct spinand_manufacturer etron_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;