mirror of
https://github.com/torvalds/linux.git
synced 2026-05-04 14:32:27 -04:00
a75a1dec03
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>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
// 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,
|
|
};
|