1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2025 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_KINGSTON 0x98 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 spi004_sdeg_ooblayout_ecc(struct mtd_info *mtd, int section, 34 struct mtd_oob_region *region) 35 { 36 if (section > 0) 37 return -ERANGE; 38 39 region->offset = mtd->oobsize / 2; 40 region->length = mtd->oobsize / 2; 41 42 return 0; 43 } 44 45 static int spi004_sdeg_ooblayout_free(struct mtd_info *mtd, int section, 46 struct mtd_oob_region *region) 47 { 48 if (section) 49 return -ERANGE; 50 51 /* 2 bytes reserved for BBM */ 52 region->offset = 2; 53 region->length = mtd->oobsize / 2 - 2; 54 55 return 0; 56 } 57 58 static const struct mtd_ooblayout_ops spi004_sdeg_ooblayout = { 59 .ecc = spi004_sdeg_ooblayout_ecc, 60 .rfree = spi004_sdeg_ooblayout_free, 61 }; 62 63 /* 64 * ecc bits: 0xC0[4,6] 65 * [0b000], No bit errors were detected; 66 * [0b001, 0b101], 3~7 Bit errors were detected and corrected. Not 67 * reach Flipping Bits; 68 * [0b110], Bit error count equals the bit flip detection threshold 69 * [0b111], Bit errors greater than ECC capability(8 bits) and not corrected; 70 */ 71 static int spi004_sdeg_ecc_get_status(struct spinand_device *spinand, u8 status) 72 { 73 struct nand_device *nand = spinand_to_nand(spinand); 74 u8 eccsr = (status & GENMASK(6, 4)) >> 4; 75 76 if (eccsr == 0) 77 return 0; 78 else if (eccsr < 6) 79 return eccsr + 2; 80 else if (eccsr == 6) 81 return nand->eccreq.strength; 82 else 83 return -EBADMSG; 84 } 85 86 static const struct spinand_info kingston_spinand_table[] = { 87 SPINAND_INFO("SPI004-SDEG", 88 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x53), 89 NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1), 90 NAND_ECCREQ(8, 512), 91 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 92 &write_cache_variants, 93 &update_cache_variants), 94 SPINAND_HAS_QE_BIT, 95 SPINAND_ECCINFO(&spi004_sdeg_ooblayout, spi004_sdeg_ecc_get_status)), 96 }; 97 98 static const struct spinand_manufacturer_ops kingston_spinand_manuf_ops = { 99 }; 100 101 const struct spinand_manufacturer kingston_spinand_manufacturer = { 102 .id = SPINAND_MFR_KINGSTON, 103 .name = "kingston", 104 .chips = kingston_spinand_table, 105 .nchips = ARRAY_SIZE(kingston_spinand_table), 106 .ops = &kingston_spinand_manuf_ops, 107 }; 108