github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-12 16:18:45 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

mtd: spinand: add support for Dosilicon DS35Q1GA/DS35M1GA

Browse Source 
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: Ahmed Naseef <naseefkm@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Ahmed Naseef 2025-12-09 11:16:02 +04:00 committed by Miquel Raynal
parent 8f0b4cce44
commit a75a1dec03
4 changed files with 95 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/mtd/nand/spi/Makefile
View File

@ -1,5 +1,5 @@
# 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

1
drivers/mtd/nand/spi/core.c
View File

@ -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,

91
drivers/mtd/nand/spi/dosilicon.c Normal file
View File

@ -0,0 +1,91 @@
// 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,
};

1
include/linux/mtd/spinand.h
View File

@ -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;