147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2022-2025 ArtInChip
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*
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* Authors:
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* keliang.liu <keliang.liu@artinchip.com>
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*/
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/mtd/spinand.h>
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#define SPINAND_MFR_ESMT 0xC8
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static SPINAND_OP_VARIANTS(read_cache_variants,
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SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
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static SPINAND_OP_VARIANTS(write_cache_variants,
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SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
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SPINAND_PROG_LOAD(true, 0, NULL, 0));
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static SPINAND_OP_VARIANTS(update_cache_variants,
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SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
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SPINAND_PROG_LOAD(false, 0, NULL, 0));
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/*
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* OOB spare area map (64 bytes)
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*
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* Bad Block Markers
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* filled by HW and kernel Reserved
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* | +-----------------------+-----------------------+
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* | | | |
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* | | OOB free data Area |non ECC protected |
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* | +-------------|-----+-----------------|-----+-----------------|-----+
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* | | | | | | | |
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* +-|---|----------+--|-----|--------------+--|-----|--------------+--|-----|--------------+
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* | | | section0 | | | section1 | | | section2 | | | section3 |
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* +-v-+-v-+---+----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+
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* | | | | | | | | | | | | | | | | |
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* |0:1|2:3|4:7|8:15|16:17|18:19|20:23|24:31|32:33|34:35|36:39|40:47|48:49|50:51|52:55|56:63|
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* | | | | | | | | | | | | | | | | |
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* +---+---+-^-+--^-+-----+-----+--^--+--^--+-----+-----+--^--+--^--+-----+-----+--^--+--^--+
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* | | | | | | | |
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* | +----------------|-----+-----------------|-----+-----------------|-----+
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* | ECC Area|(Main + Spare) - filled|by ESMT NAND HW |
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* | | | |
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* +---------------------+-----------------------+-----------------------+
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* OOB ECC protected Area - not used due to
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* partial programming from some filesystems
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* (like JFFS2 with cleanmarkers)
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*/
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static int f50l1g_ooblayout_ecc(struct mtd_info *mtd, int section,
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struct mtd_oob_region *region)
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{
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if (section >= 4)
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return -ERANGE;
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region->offset = section * 16 + 8;
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region->length = 8;
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return 0;
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}
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static int f50l1g_ooblayout_free(struct mtd_info *mtd, int section,
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struct mtd_oob_region *region)
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{
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if (section >= 4)
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return -ERANGE;
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/*
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* Reserve space for bad blocks markers (section0) and
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* reserved bytes (sections 1-3)
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*/
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region->offset = section * 16 + 2;
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/* Use only 2 non-protected ECC bytes per each OOB section */
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region->length = 2;
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return 0;
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}
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static const struct mtd_ooblayout_ops f50l1g_ooblayout = {
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.ecc = f50l1g_ooblayout_ecc,
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.free = f50l1g_ooblayout_free,
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};
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static int f50l1g_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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switch (status & STATUS_ECC_MASK) {
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case STATUS_ECC_NO_BITFLIPS:
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return 0;
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case STATUS_ECC_UNCOR_ERROR:
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return -EBADMSG;
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case STATUS_ECC_HAS_BITFLIPS:
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return ((status & STATUS_ECC_MASK) >> 4);
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default:
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break;
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}
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return -EINVAL;
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}
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static const struct spinand_info esmt_spinand_table[] = {
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SPINAND_INFO("F50L1G",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x01),
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NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
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NAND_ECCREQ(1, 512),
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SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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&write_cache_variants,
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&update_cache_variants),
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SPINAND_HAS_QE_BIT,
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SPINAND_ECCINFO(&f50l1g_ooblayout,
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f50l1g_ecc_get_status)),
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};
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static int esmt_spinand_init(struct spinand_device *spinand)
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{
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pr_info("Esmt %s \n", __func__);
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return 0;
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}
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static void esmt_spinand_cleanup(struct spinand_device *spinand)
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{
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pr_info("Esmt %s \n", __func__);
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}
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static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = {
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.init = esmt_spinand_init,
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.cleanup = esmt_spinand_cleanup
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};
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const struct spinand_manufacturer esmt_spinand_manufacturer = {
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.id = SPINAND_MFR_ESMT,
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.name = "Esmt",
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.chips = esmt_spinand_table,
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.nchips = ARRAY_SIZE(esmt_spinand_table),
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.ops = &esmt_spinand_manuf_ops,
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};
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