1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT) 2 /* 3 * Copyright (c) 2023, SberDevices. All Rights Reserved. 4 * 5 * Author: Martin Kurbanov <mmkurbanov@salutedevices.com> 6 */ 7 8 #include <linux/device.h> 9 #include <linux/kernel.h> 10 #include <linux/mtd/spinand.h> 11 12 #define SPINAND_MFR_FORESEE 0xCD 13 14 #define F35SQB002G_STATUS_ECC_MASK (7 << 4) 15 #define F35SQB002G_STATUS_ECC_NO_BITFLIPS (0 << 4) 16 #define F35SQB002G_STATUS_ECC_1_3_BITFLIPS (1 << 4) 17 #define F35SQB002G_STATUS_ECC_UNCOR_ERROR (7 << 4) 18 19 static SPINAND_OP_VARIANTS(read_cache_variants, 20 SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0), 21 SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0), 22 SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0), 23 SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0)); 24 25 static SPINAND_OP_VARIANTS(write_cache_variants, 26 SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0), 27 SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0)); 28 29 static SPINAND_OP_VARIANTS(update_cache_variants, 30 SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0), 31 SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0)); 32 33 static int f35sqa002g_ooblayout_ecc(struct mtd_info *mtd, int section, 34 struct mtd_oob_region *region) 35 { 36 return -ERANGE; 37 } 38 39 static int f35sqa002g_ooblayout_free(struct mtd_info *mtd, int section, 40 struct mtd_oob_region *region) 41 { 42 if (section) 43 return -ERANGE; 44 45 /* Reserve 2 bytes for the BBM. */ 46 region->offset = 2; 47 region->length = 62; 48 49 return 0; 50 } 51 52 static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = { 53 .ecc = f35sqa002g_ooblayout_ecc, 54 .free = f35sqa002g_ooblayout_free, 55 }; 56 57 static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status) 58 { 59 struct nand_device *nand = spinand_to_nand(spinand); 60 61 switch (status & STATUS_ECC_MASK) { 62 case STATUS_ECC_NO_BITFLIPS: 63 return 0; 64 65 case STATUS_ECC_HAS_BITFLIPS: 66 return nanddev_get_ecc_conf(nand)->strength; 67 68 default: 69 break; 70 } 71 72 /* More than 1-bit error was detected in one or more sectors and 73 * cannot be corrected. 74 */ 75 return -EBADMSG; 76 } 77 78 static int f35sqb002g_ecc_get_status(struct spinand_device *spinand, u8 status) 79 { 80 switch (status & F35SQB002G_STATUS_ECC_MASK) { 81 case F35SQB002G_STATUS_ECC_NO_BITFLIPS: 82 return 0; 83 84 case F35SQB002G_STATUS_ECC_1_3_BITFLIPS: 85 return 3; 86 87 case F35SQB002G_STATUS_ECC_UNCOR_ERROR: 88 return -EBADMSG; 89 90 default: /* (2 << 4) through (6 << 4) are 4-8 corrected errors */ 91 return ((status & F35SQB002G_STATUS_ECC_MASK) >> 4) + 2; 92 } 93 94 return -EINVAL; 95 } 96 97 static const struct spinand_info foresee_spinand_table[] = { 98 SPINAND_INFO("F35SQA002G", 99 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72), 100 NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1), 101 NAND_ECCREQ(1, 512), 102 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 103 &write_cache_variants, 104 &update_cache_variants), 105 SPINAND_HAS_QE_BIT, 106 SPINAND_ECCINFO(&f35sqa002g_ooblayout, 107 f35sqa002g_ecc_get_status)), 108 SPINAND_INFO("F35SQA001G", 109 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71, 0x71), 110 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), 111 NAND_ECCREQ(1, 512), 112 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 113 &write_cache_variants, 114 &update_cache_variants), 115 SPINAND_HAS_QE_BIT, 116 SPINAND_ECCINFO(&f35sqa002g_ooblayout, 117 f35sqa002g_ecc_get_status)), 118 SPINAND_INFO("F35SQB002G", 119 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x52, 0x52), 120 NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1), 121 NAND_ECCREQ(8, 512), 122 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 123 &write_cache_variants, 124 &update_cache_variants), 125 SPINAND_HAS_QE_BIT, 126 SPINAND_ECCINFO(&f35sqa002g_ooblayout, 127 f35sqb002g_ecc_get_status)), 128 }; 129 130 static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = { 131 }; 132 133 const struct spinand_manufacturer foresee_spinand_manufacturer = { 134 .id = SPINAND_MFR_FORESEE, 135 .name = "FORESEE", 136 .chips = foresee_spinand_table, 137 .nchips = ARRAY_SIZE(foresee_spinand_table), 138 .ops = &foresee_spinand_manuf_ops, 139 }; 140