Commit a75a1dec authored by Ahmed Naseef's avatar Ahmed Naseef Committed by Miquel Raynal
Browse files

mtd: spinand: add support for Dosilicon DS35Q1GA/DS35M1GA 

Add support for Dosilicon DS35Q1GA (3.3V) and DS35M1GA (1.8V) SPI NAND.

These are 1Gbit (128MB) devices with:
  - 2048 byte pages + 64 byte OOB
  - 64 pages per block, 1024 blocks
  - On-die 4-bit ECC per 512 byte sector

The 64-byte OOB area is divided into 4 segments of 16 bytes, with each
segment containing 8 bytes of user data (M2+M1) and 8 bytes of ECC
parity (R1). This provides 30 bytes of usable OOB space after reserving
2 bytes for the bad block marker.

Tested on Genexis Platinum 4410 (EcoNet EN751221) by writing known
patterns to OOB and verifying ECC parity placement in R1 regions.

Datasheet:
  https://www.dosilicon.com/resources/SPI%20NAND/DS35X1GAXXX_rev08.pdf



Signed-off-by: default avatarAhmed Naseef <naseefkm@gmail.com>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
parent 8f0b4cce

drivers/mtd/nand/spi/Makefile

+2 −2
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# SPDX-License-Identifier: GPL-2.0

spinand-objs := core.o otp.o

spinand-objs += alliancememory.o ato.o esmt.o fmsh.o foresee.o gigadevice.o macronix.o

spinand-objs += micron.o paragon.o skyhigh.o toshiba.o winbond.o xtx.o

spinand-objs += alliancememory.o ato.o dosilicon.o esmt.o fmsh.o foresee.o gigadevice.o

spinand-objs += macronix.o micron.o paragon.o skyhigh.o toshiba.o winbond.o xtx.o

obj-$(CONFIG_MTD_SPI_NAND) += spinand.o

drivers/mtd/nand/spi/core.c

+1 −0
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@@ -1227,6 +1227,7 @@ static const struct nand_ops spinand_ops = { 
static const struct spinand_manufacturer *spinand_manufacturers[] = {

	&alliancememory_spinand_manufacturer,

	&ato_spinand_manufacturer,

	&dosilicon_spinand_manufacturer,

	&esmt_8c_spinand_manufacturer,

	&esmt_c8_spinand_manufacturer,

	&fmsh_spinand_manufacturer,

drivers/mtd/nand/spi/dosilicon.c

0 → 100644
+91 −0
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// SPDX-License-Identifier: GPL-2.0

/*

 * Author: Ahmed Naseef <naseefkm@gmail.com>

 */



#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/mtd/spinand.h>



#define SPINAND_MFR_DOSILICON        0xE5



static SPINAND_OP_VARIANTS(read_cache_variants,

		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),

		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),

		SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0),

		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0));



static SPINAND_OP_VARIANTS(write_cache_variants,

		SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),

		SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));



static SPINAND_OP_VARIANTS(update_cache_variants,

		SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),

		SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));



static int ds35xx_ooblayout_ecc(struct mtd_info *mtd, int section,

				struct mtd_oob_region *region)

{

	if (section > 3)

		return -ERANGE;



	region->offset = 8 + (section * 16);

	region->length = 8;



	return 0;

}



static int ds35xx_ooblayout_free(struct mtd_info *mtd, int section,

				 struct mtd_oob_region *region)

{

	if (section > 3)

		return -ERANGE;



	if (section == 0) {

		/* reserve 2 bytes for the BBM */

		region->offset = 2;

		region->length = 6;

	} else {

		region->offset = section * 16;

		region->length = 8;

	}



	return 0;

}



static const struct mtd_ooblayout_ops ds35xx_ooblayout = {

	.ecc = ds35xx_ooblayout_ecc,

	.free = ds35xx_ooblayout_free,

};



static const struct spinand_info dosilicon_spinand_table[] = {

	SPINAND_INFO("DS35Q1GA",

		SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71),

		NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),

		NAND_ECCREQ(4, 512),

		SPINAND_INFO_OP_VARIANTS(&read_cache_variants,

					 &write_cache_variants,

					 &update_cache_variants),

		SPINAND_HAS_QE_BIT,

		SPINAND_ECCINFO(&ds35xx_ooblayout, NULL)),

	SPINAND_INFO("DS35M1GA",

		SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x21),

		NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),

		NAND_ECCREQ(4, 512),

		SPINAND_INFO_OP_VARIANTS(&read_cache_variants,

					 &write_cache_variants,

					 &update_cache_variants),

		SPINAND_HAS_QE_BIT,

		SPINAND_ECCINFO(&ds35xx_ooblayout, NULL)),

};



static const struct spinand_manufacturer_ops dosilicon_spinand_manuf_ops = {

};



const struct spinand_manufacturer dosilicon_spinand_manufacturer = {

	.id = SPINAND_MFR_DOSILICON,

	.name = "Dosilicon",

	.chips = dosilicon_spinand_table,

	.nchips = ARRAY_SIZE(dosilicon_spinand_table),

	.ops = &dosilicon_spinand_manuf_ops,

};

include/linux/mtd/spinand.h

+1 −0
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@@ -354,6 +354,7 @@ struct spinand_manufacturer { 
/* SPI NAND manufacturers */

extern const struct spinand_manufacturer alliancememory_spinand_manufacturer;

extern const struct spinand_manufacturer ato_spinand_manufacturer;

extern const struct spinand_manufacturer dosilicon_spinand_manufacturer;

extern const struct spinand_manufacturer esmt_8c_spinand_manufacturer;

extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;

extern const struct spinand_manufacturer fmsh_spinand_manufacturer;