176 lines
5.5 KiB
C
176 lines
5.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2022 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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#ifndef __UBOOT__
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#include <malloc.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#endif
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#include <linux/bitops.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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#define ESMT_OOB_SECTION_COUNT 4
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#define ESMT_OOB_SECTION_SIZE(nand) \
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(nanddev_per_page_oobsize(nand) / ESMT_OOB_SECTION_COUNT)
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#define ESMT_OOB_FREE_SIZE(nand) \
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(ESMT_OOB_SECTION_SIZE(nand) / 2)
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#define ESMT_OOB_ECC_SIZE(nand) \
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(ESMT_OOB_SECTION_SIZE(nand) - ESMT_OOB_FREE_SIZE(nand))
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#define ESMT_OOB_BBM_SIZE 2
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static int f50l1g41lb_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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struct nand_device *nand = mtd_to_nanddev(mtd);
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if (section >= ESMT_OOB_SECTION_COUNT)
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return -ERANGE;
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region->offset = section * ESMT_OOB_SECTION_SIZE(nand) +
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ESMT_OOB_FREE_SIZE(nand);
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region->length = ESMT_OOB_ECC_SIZE(nand);
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return 0;
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}
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static int f50l1g41lb_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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struct nand_device *nand = mtd_to_nanddev(mtd);
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if (section >= ESMT_OOB_SECTION_COUNT)
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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 * ESMT_OOB_SECTION_SIZE(nand) + 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 f50l1g41lb_ooblayout = {
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.ecc = f50l1g41lb_ooblayout_ecc,
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.rfree = f50l1g41lb_ooblayout_free,
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};
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static int f50l1g_select_target(struct spinand_device *spinand,
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unsigned int target)
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{
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struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1),
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SPI_MEM_OP_NO_ADDR,
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SPI_MEM_OP_NO_DUMMY,
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SPI_MEM_OP_DATA_OUT(1,
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spinand->scratchbuf,
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1));
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*spinand->scratchbuf = target;
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return spi_mem_exec_op(spinand->slave, &op);
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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(0x01),
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NAND_MEMORG(1, 2048, 64, 64, 1024, 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(&f50l1g41lb_ooblayout, NULL),
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SPINAND_SELECT_TARGET(f50l1g_select_target)),
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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 int esmt_spinand_detect(struct spinand_device *spinand)
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{
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u8 *id = spinand->id.data;
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int ret;
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if (id[1] != SPINAND_MFR_ESMT)
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return 0;
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ret = spinand_match_and_init(spinand, esmt_spinand_table,
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ARRAY_SIZE(esmt_spinand_table),
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&id[2]);
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if (ret)
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return ret;
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return 1;
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}
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static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = {
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.detect = esmt_spinand_detect,
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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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.ops = &esmt_spinand_manuf_ops,
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};
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