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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2019 Jeff Kletsky4 *5 * Author: Jeff Kletsky <git-commits@allycomm.com>6 */7 8#include <linux/device.h>9#include <linux/kernel.h>10#include <linux/mtd/spinand.h>11 12 13#define SPINAND_MFR_PARAGON 0xa114 15 16#define PN26G0XA_STATUS_ECC_BITMASK (3 << 4)17 18#define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4)19#define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4)20#define PN26G0XA_STATUS_ECC_ERRORED (2 << 4)21#define PN26G0XA_STATUS_ECC_8_CORRECTED (3 << 4)22 23 24static SPINAND_OP_VARIANTS(read_cache_variants,25 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),26 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),27 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),28 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),29 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),30 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));31 32static SPINAND_OP_VARIANTS(write_cache_variants,33 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),34 SPINAND_PROG_LOAD(true, 0, NULL, 0));35 36static SPINAND_OP_VARIANTS(update_cache_variants,37 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),38 SPINAND_PROG_LOAD(false, 0, NULL, 0));39 40 41static int pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,42 struct mtd_oob_region *region)43{44 if (section > 3)45 return -ERANGE;46 47 region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */48 region->length = 13;49 50 return 0;51}52 53static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section,54 struct mtd_oob_region *region)55{56 if (section > 4)57 return -ERANGE;58 59 if (section == 4) {60 region->offset = 64;61 region->length = 64;62 } else {63 region->offset = 4 + (15 * section);64 region->length = 2;65 }66 67 return 0;68}69 70static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,71 u8 status)72{73 switch (status & PN26G0XA_STATUS_ECC_BITMASK) {74 case PN26G0XA_STATUS_ECC_NONE_DETECTED:75 return 0;76 77 case PN26G0XA_STATUS_ECC_1_7_CORRECTED:78 return 7; /* Return upper limit by convention */79 80 case PN26G0XA_STATUS_ECC_8_CORRECTED:81 return 8;82 83 case PN26G0XA_STATUS_ECC_ERRORED:84 return -EBADMSG;85 86 default:87 break;88 }89 90 return -EINVAL;91}92 93static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {94 .ecc = pn26g0xa_ooblayout_ecc,95 .free = pn26g0xa_ooblayout_free,96};97 98 99static const struct spinand_info paragon_spinand_table[] = {100 SPINAND_INFO("PN26G01A",101 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe1),102 NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1),103 NAND_ECCREQ(8, 512),104 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,105 &write_cache_variants,106 &update_cache_variants),107 0,108 SPINAND_ECCINFO(&pn26g0xa_ooblayout,109 pn26g0xa_ecc_get_status)),110 SPINAND_INFO("PN26G02A",111 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe2),112 NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1),113 NAND_ECCREQ(8, 512),114 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,115 &write_cache_variants,116 &update_cache_variants),117 0,118 SPINAND_ECCINFO(&pn26g0xa_ooblayout,119 pn26g0xa_ecc_get_status)),120};121 122static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {123};124 125const struct spinand_manufacturer paragon_spinand_manufacturer = {126 .id = SPINAND_MFR_PARAGON,127 .name = "Paragon",128 .chips = paragon_spinand_table,129 .nchips = ARRAY_SIZE(paragon_spinand_table),130 .ops = ¶gon_spinand_manuf_ops,131};132