1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2021 Rockchip Electronics Co., Ltd 4 * 5 * Authors: 6 * Dingqiang Lin <jon.lin@rock-chips.com> 7 */ 8 9 #ifndef __UBOOT__ 10 #include <linux/device.h> 11 #include <linux/kernel.h> 12 #endif 13 #include <linux/mtd/spinand.h> 14 15 #define SPINAND_MFR_ETRON 0xD5 16 17 static SPINAND_OP_VARIANTS(read_cache_variants, 18 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), 19 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 20 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0), 21 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 22 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 23 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 24 25 static SPINAND_OP_VARIANTS(write_cache_variants, 26 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 27 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 28 29 static SPINAND_OP_VARIANTS(update_cache_variants, 30 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 31 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 32 33 static int em73c044vcf_oh_ooblayout_ecc(struct mtd_info *mtd, int section, 34 struct mtd_oob_region *region) 35 { 36 if (section > 3) 37 return -ERANGE; 38 39 region->offset = (16 * section) + 8; 40 region->length = 8; 41 42 return 0; 43 } 44 45 static int em73c044vcf_oh_ooblayout_free(struct mtd_info *mtd, int section, 46 struct mtd_oob_region *region) 47 { 48 if (section > 3) 49 return -ERANGE; 50 51 region->offset = (16 * section) + 2; 52 region->length = 6; 53 54 return 0; 55 } 56 57 static const struct mtd_ooblayout_ops em73c044vcf_oh_ooblayout = { 58 .ecc = em73c044vcf_oh_ooblayout_ecc, 59 .rfree = em73c044vcf_oh_ooblayout_free, 60 }; 61 62 static int em73c044vcf_oh_ecc_get_status(struct spinand_device *spinand, 63 u8 status) 64 { 65 struct nand_device *nand = spinand_to_nand(spinand); 66 67 switch (status & STATUS_ECC_MASK) { 68 case STATUS_ECC_NO_BITFLIPS: 69 return 0; 70 71 case STATUS_ECC_UNCOR_ERROR: 72 return -EBADMSG; 73 74 case STATUS_ECC_HAS_BITFLIPS: 75 return 1; 76 77 default: 78 return nand->eccreq.strength; 79 } 80 81 return -EINVAL; 82 } 83 84 static const struct spinand_info etron_spinand_table[] = { 85 SPINAND_INFO("EM73C044VCF-0H", 0x36, 86 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1), 87 NAND_ECCREQ(4, 512), 88 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 89 &write_cache_variants, 90 &update_cache_variants), 91 SPINAND_HAS_QE_BIT, 92 SPINAND_ECCINFO(&em73c044vcf_oh_ooblayout, 93 em73c044vcf_oh_ecc_get_status)), 94 }; 95 96 /** 97 * etron_spinand_detect - initialize device related part in spinand_device 98 * struct if it is a Etron device. 99 * @spinand: SPI NAND device structure 100 */ 101 static int etron_spinand_detect(struct spinand_device *spinand) 102 { 103 u8 *id = spinand->id.data; 104 int ret; 105 106 /* 107 * Etron SPI NAND read ID need a dummy byte, 108 * so the first byte in raw_id is dummy. 109 */ 110 if (id[1] != SPINAND_MFR_ETRON) 111 return 0; 112 113 ret = spinand_match_and_init(spinand, etron_spinand_table, 114 ARRAY_SIZE(etron_spinand_table), id[2]); 115 if (ret) 116 return ret; 117 118 return 1; 119 } 120 121 static const struct spinand_manufacturer_ops etron_spinand_manuf_ops = { 122 .detect = etron_spinand_detect, 123 }; 124 125 const struct spinand_manufacturer etron_spinand_manufacturer = { 126 .id = SPINAND_MFR_ETRON, 127 .name = "Etron", 128 .ops = &etron_spinand_manuf_ops, 129 }; 130