1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018 Macronix 4 * 5 * Author: Boris Brezillon <boris.brezillon@bootlin.com> 6 */ 7 8 #ifndef __UBOOT__ 9 #include <linux/device.h> 10 #include <linux/kernel.h> 11 #endif 12 #include <linux/mtd/spinand.h> 13 14 #define SPINAND_MFR_MACRONIX 0xC2 15 16 static SPINAND_OP_VARIANTS(read_cache_variants, 17 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 18 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 19 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 20 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 21 22 static SPINAND_OP_VARIANTS(write_cache_variants, 23 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 24 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 25 26 static SPINAND_OP_VARIANTS(update_cache_variants, 27 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 28 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 29 30 static int mx35lfxge4ab_ooblayout_ecc(struct mtd_info *mtd, int section, 31 struct mtd_oob_region *region) 32 { 33 return -ERANGE; 34 } 35 36 static int mx35lfxge4ab_ooblayout_free(struct mtd_info *mtd, int section, 37 struct mtd_oob_region *region) 38 { 39 if (section) 40 return -ERANGE; 41 42 region->offset = 2; 43 region->length = mtd->oobsize - 2; 44 45 return 0; 46 } 47 48 static const struct mtd_ooblayout_ops mx35lfxge4ab_ooblayout = { 49 .ecc = mx35lfxge4ab_ooblayout_ecc, 50 .rfree = mx35lfxge4ab_ooblayout_free, 51 }; 52 53 static int mx35lf1ge4ab_get_eccsr(struct spinand_device *spinand, u8 *eccsr) 54 { 55 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0x7c, 1), 56 SPI_MEM_OP_NO_ADDR, 57 SPI_MEM_OP_DUMMY(1, 1), 58 SPI_MEM_OP_DATA_IN(1, eccsr, 1)); 59 60 return spi_mem_exec_op(spinand->slave, &op); 61 } 62 63 static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand, 64 u8 status) 65 { 66 struct nand_device *nand = spinand_to_nand(spinand); 67 u8 eccsr; 68 69 switch (status & STATUS_ECC_MASK) { 70 case STATUS_ECC_NO_BITFLIPS: 71 return 0; 72 73 case STATUS_ECC_UNCOR_ERROR: 74 return -EBADMSG; 75 76 case STATUS_ECC_HAS_BITFLIPS: 77 /* 78 * Let's try to retrieve the real maximum number of bitflips 79 * in order to avoid forcing the wear-leveling layer to move 80 * data around if it's not necessary. 81 */ 82 if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr)) 83 return nand->eccreq.strength; 84 85 if (WARN_ON(eccsr > nand->eccreq.strength || !eccsr)) 86 return nand->eccreq.strength; 87 88 return eccsr; 89 90 default: 91 break; 92 } 93 94 return -EINVAL; 95 } 96 97 static const struct spinand_info macronix_spinand_table[] = { 98 SPINAND_INFO("MX35LF1GE4AB", 0x12, 99 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1), 100 NAND_ECCREQ(4, 512), 101 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 102 &write_cache_variants, 103 &update_cache_variants), 104 SPINAND_HAS_QE_BIT, 105 SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout, 106 mx35lf1ge4ab_ecc_get_status)), 107 SPINAND_INFO("MX35LF2GE4AB", 0x22, 108 NAND_MEMORG(1, 2048, 64, 64, 2048, 2, 1, 1), 109 NAND_ECCREQ(4, 512), 110 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 111 &write_cache_variants, 112 &update_cache_variants), 113 SPINAND_HAS_QE_BIT, 114 SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout, NULL)), 115 SPINAND_INFO("MX35LF2GE4AD", 0x26, 116 NAND_MEMORG(1, 2048, 64, 64, 2048, 2, 1, 1), 117 NAND_ECCREQ(8, 512), 118 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 119 &write_cache_variants, 120 &update_cache_variants), 121 SPINAND_HAS_QE_BIT, 122 SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout, 123 mx35lf1ge4ab_ecc_get_status)), 124 SPINAND_INFO("MX35LF4GE4AD", 0x37, 125 NAND_MEMORG(1, 4096, 128, 64, 2048, 2, 1, 1), 126 NAND_ECCREQ(8, 512), 127 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 128 &write_cache_variants, 129 &update_cache_variants), 130 SPINAND_HAS_QE_BIT, 131 SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout, 132 mx35lf1ge4ab_ecc_get_status)), 133 }; 134 135 static int macronix_spinand_detect(struct spinand_device *spinand) 136 { 137 u8 *id = spinand->id.data; 138 int ret; 139 140 /* 141 * Macronix SPI NAND read ID needs a dummy byte, so the first byte in 142 * raw_id is garbage. 143 */ 144 if (id[1] != SPINAND_MFR_MACRONIX) 145 return 0; 146 147 ret = spinand_match_and_init(spinand, macronix_spinand_table, 148 ARRAY_SIZE(macronix_spinand_table), 149 id[2]); 150 if (ret) 151 return ret; 152 153 return 1; 154 } 155 156 static const struct spinand_manufacturer_ops macronix_spinand_manuf_ops = { 157 .detect = macronix_spinand_detect, 158 }; 159 160 const struct spinand_manufacturer macronix_spinand_manufacturer = { 161 .id = SPINAND_MFR_MACRONIX, 162 .name = "Macronix", 163 .ops = ¯onix_spinand_manuf_ops, 164 }; 165