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SubjectRe: [PATCH] mtd: spinand: Add support for ATO25D1GA
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Miquel Raynal <miquel.raynal@bootlin.com> writes:

> Hi Aidan,
>
> aidanmacdonald.0x0@gmail.com wrote on Fri, 3 Jun 2022 14:51:49 +0100:
>
>> Add support for the ATO25D1GA SPI NAND flash.
>>
>> Datasheet:
>> - https://atta.szlcsc.com/upload/public/pdf/source/20191212/C469320_04599D67B03B078044EB65FF5AEDDDE9.pdf
>>
>> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
>> ---
>> drivers/mtd/nand/spi/Makefile | 2 +-
>> drivers/mtd/nand/spi/ato.c | 86 +++++++++++++++++++++++++++++++++++
>> drivers/mtd/nand/spi/core.c | 1 +
>> include/linux/mtd/spinand.h | 1 +
>> 4 files changed, 89 insertions(+), 1 deletion(-)
>> create mode 100644 drivers/mtd/nand/spi/ato.c
>>
>> diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
>> index 80dabe6ff0f3..ae17c13d1abe 100644
>> --- 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 gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
>> +spinand-objs := ato.o core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
>
> I would keep core.o first in that list, even if it breaks alphabetical
> ordering slightly :)
>
> Otherwise the patch looks good to me.
>

Okay, I'll send a v2 to fix that.

>> obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
>> diff --git a/drivers/mtd/nand/spi/ato.c b/drivers/mtd/nand/spi/ato.c
>> new file mode 100644
>> index 000000000000..82b377c06812
>> --- /dev/null
>> +++ b/drivers/mtd/nand/spi/ato.c
>> @@ -0,0 +1,86 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2022 Aidan MacDonald
>> + *
>> + * Author: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
>> + */
>> +
>> +#include <linux/device.h>
>> +#include <linux/kernel.h>
>> +#include <linux/mtd/spinand.h>
>> +
>> +
>> +#define SPINAND_MFR_ATO 0x9b
>> +
>> +
>> +static SPINAND_OP_VARIANTS(read_cache_variants,
>> + SPINAND_PAGE_READ_FROM_CACHE_X4_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 ato25d1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
>> + struct mtd_oob_region *region)
>> +{
>> + if (section > 3)
>> + return -ERANGE;
>> +
>> + region->offset = (16 * section) + 8;
>> + region->length = 8;
>> + return 0;
>> +}
>> +
>> +static int ato25d1ga_ooblayout_free(struct mtd_info *mtd, int section,
>> + struct mtd_oob_region *region)
>> +{
>> + if (section > 3)
>> + return -ERANGE;
>> +
>> + if (section) {
>> + region->offset = (16 * section);
>> + region->length = 8;
>> + } else {
>> + /* first byte of section 0 is reserved for the BBM */
>> + region->offset = 1;
>> + region->length = 7;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct mtd_ooblayout_ops ato25d1ga_ooblayout = {
>> + .ecc = ato25d1ga_ooblayout_ecc,
>> + .free = ato25d1ga_ooblayout_free,
>> +};
>> +
>> +
>> +static const struct spinand_info ato_spinand_table[] = {
>> + SPINAND_INFO("ATO25D1GA",
>> + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x12),
>> + NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
>> + NAND_ECCREQ(1, 512),
>> + SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
>> + &write_cache_variants,
>> + &update_cache_variants),
>> + SPINAND_HAS_QE_BIT,
>> + SPINAND_ECCINFO(&ato25d1ga_ooblayout, NULL)),
>> +};
>> +
>> +static const struct spinand_manufacturer_ops ato_spinand_manuf_ops = {
>> +};
>> +
>> +const struct spinand_manufacturer ato_spinand_manufacturer = {
>> + .id = SPINAND_MFR_ATO,
>> + .name = "ATO",
>> + .chips = ato_spinand_table,
>> + .nchips = ARRAY_SIZE(ato_spinand_table),
>> + .ops = &ato_spinand_manuf_ops,
>> +};
>> diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
>> index d5b685d1605e..9d73910a7ae8 100644
>> --- a/drivers/mtd/nand/spi/core.c
>> +++ b/drivers/mtd/nand/spi/core.c
>> @@ -927,6 +927,7 @@ static const struct nand_ops spinand_ops = {
>> };
>>
>> static const struct spinand_manufacturer *spinand_manufacturers[] = {
>> + &ato_spinand_manufacturer,
>> &gigadevice_spinand_manufacturer,
>> &macronix_spinand_manufacturer,
>> &micron_spinand_manufacturer,
>> diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
>> index 5584d3bb6556..6d3392a7edc6 100644
>> --- a/include/linux/mtd/spinand.h
>> +++ b/include/linux/mtd/spinand.h
>> @@ -260,6 +260,7 @@ struct spinand_manufacturer {
>> };
>>
>> /* SPI NAND manufacturers */
>> +extern const struct spinand_manufacturer ato_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;
>
>
> Thanks,
> Miquèl

Regards,
Aidan

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