1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT) 2 /* 3 * Copyright (c) 2021 Rockchip Electronics Co., Ltd. 4 */ 5 6 #ifndef __UBOOT__ 7 #include <linux/device.h> 8 #include <linux/kernel.h> 9 #endif 10 #include <linux/mtd/spinand.h> 11 12 #define SPINAND_MFR_BIWIN 0xBC 13 14 #define BIWIN_CFG_BUF_READ BIT(3) 15 #define BIWIN_STATUS_ECC_HAS_BITFLIPS_T (3 << 4) 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 bwjx08k_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) + 12; 40 region->length = 4; 41 42 return 0; 43 } 44 45 static int bwjx08k_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 = 10; 53 54 return 0; 55 } 56 57 static const struct mtd_ooblayout_ops bwjx08k_ooblayout = { 58 .ecc = bwjx08k_ooblayout_ecc, 59 .rfree = bwjx08k_ooblayout_free, 60 }; 61 62 static int bwjx08k_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 /* Another set for the same id[2] devices in one series */ 85 static const struct spinand_info biwin_spinand_table[] = { 86 SPINAND_INFO("BWJX08K", 0xB3, 87 NAND_MEMORG(1, 2048, 64, 64, 2048, 1, 1, 1), 88 NAND_ECCREQ(8, 512), 89 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 90 &write_cache_variants, 91 &update_cache_variants), 92 SPINAND_HAS_QE_BIT, 93 SPINAND_ECCINFO(&bwjx08k_ooblayout, 94 bwjx08k_ecc_get_status)), 95 }; 96 97 /** 98 * biwin_spinand_detect - initialize device related part in spinand_device 99 * struct if it is a Winbond device. 100 * @spinand: SPI NAND device structure 101 */ 102 static int biwin_spinand_detect(struct spinand_device *spinand) 103 { 104 u8 *id = spinand->id.data; 105 int ret; 106 107 /* 108 * BIWIN SPI NAND read ID need a dummy byte, 109 * so the first byte in raw_id is dummy. 110 */ 111 if (id[1] != SPINAND_MFR_BIWIN) 112 return 0; 113 114 ret = spinand_match_and_init(spinand, biwin_spinand_table, 115 ARRAY_SIZE(biwin_spinand_table), id[2]); 116 if (ret) 117 return ret; 118 119 return 1; 120 } 121 122 static const struct spinand_manufacturer_ops biwin_spinand_manuf_ops = { 123 .detect = biwin_spinand_detect, 124 }; 125 126 const struct spinand_manufacturer biwin_spinand_manufacturer = { 127 .id = SPINAND_MFR_BIWIN, 128 .name = "BIWIN", 129 .ops = &biwin_spinand_manuf_ops, 130 }; 131