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131 lines
3.3 KiB
131 lines
3.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2019 Jeff Kletsky |
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* |
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* Author: Jeff Kletsky <[email protected]> |
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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_PARAGON 0xa1 |
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#define PN26G0XA_STATUS_ECC_BITMASK (3 << 4) |
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#define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4) |
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#define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4) |
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#define PN26G0XA_STATUS_ECC_ERRORED (2 << 4) |
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#define PN26G0XA_STATUS_ECC_8_CORRECTED (3 << 4) |
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static SPINAND_OP_VARIANTS(read_cache_variants, |
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SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_DUALIO_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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static int pn26g0xa_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 > 3) |
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return -ERANGE; |
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region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */ |
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region->length = 13; |
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return 0; |
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} |
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static int pn26g0xa_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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if (section == 4) { |
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region->offset = 64; |
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region->length = 64; |
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} else { |
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region->offset = 4 + (15 * section); |
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region->length = 2; |
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} |
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return 0; |
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} |
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static int pn26g0xa_ecc_get_status(struct spinand_device *spinand, |
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u8 status) |
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{ |
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switch (status & PN26G0XA_STATUS_ECC_BITMASK) { |
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case PN26G0XA_STATUS_ECC_NONE_DETECTED: |
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return 0; |
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case PN26G0XA_STATUS_ECC_1_7_CORRECTED: |
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return 7; /* Return upper limit by convention */ |
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case PN26G0XA_STATUS_ECC_8_CORRECTED: |
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return 8; |
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case PN26G0XA_STATUS_ECC_ERRORED: |
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return -EBADMSG; |
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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 mtd_ooblayout_ops pn26g0xa_ooblayout = { |
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.ecc = pn26g0xa_ooblayout_ecc, |
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.free = pn26g0xa_ooblayout_free, |
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}; |
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static const struct spinand_info paragon_spinand_table[] = { |
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SPINAND_INFO("PN26G01A", |
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe1), |
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NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1), |
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NAND_ECCREQ(8, 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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0, |
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SPINAND_ECCINFO(&pn26g0xa_ooblayout, |
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pn26g0xa_ecc_get_status)), |
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SPINAND_INFO("PN26G02A", |
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe2), |
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NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1), |
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NAND_ECCREQ(8, 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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0, |
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SPINAND_ECCINFO(&pn26g0xa_ooblayout, |
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pn26g0xa_ecc_get_status)), |
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}; |
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static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = { |
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}; |
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const struct spinand_manufacturer paragon_spinand_manufacturer = { |
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.id = SPINAND_MFR_PARAGON, |
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.name = "Paragon", |
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.chips = paragon_spinand_table, |
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.nchips = ARRAY_SIZE(paragon_spinand_table), |
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.ops = ¶gon_spinand_manuf_ops, |
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};
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