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_UNIM 0xA1 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 tx25g01_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 tx25g01_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 tx25g01_ooblayout = { 58 .ecc = tx25g01_ooblayout_ecc, 59 .rfree = tx25g01_ooblayout_free, 60 }; 61 62 /* 63 * ecc bits: 0xC0[4,6] 64 * [0b000], No bit errors were detected; 65 * [0b001, 0b011], 1~3 Bit errors were detected and corrected. Not 66 * reach Flipping Bits; 67 * [0b100], Bit error count equals the bit flip 68 * detection threshold 69 * others, Reserved. 70 */ 71 static int tx25g01_ecc_get_status(struct spinand_device *spinand, 72 u8 status) 73 { 74 u8 eccsr = (status & GENMASK(6, 4)) >> 2; 75 76 if (eccsr <= 7) 77 return eccsr; 78 else if (eccsr == 12) 79 return 8; 80 else 81 return -EBADMSG; 82 } 83 84 static const struct spinand_info unim_spinand_table[] = { 85 SPINAND_INFO("TX25G01", 86 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xF1), 87 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1), 88 NAND_ECCREQ(4, 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(&tx25g01_ooblayout, tx25g01_ecc_get_status)), 94 }; 95 96 static const struct spinand_manufacturer_ops unim_spinand_manuf_ops = { 97 }; 98 99 const struct spinand_manufacturer unim_spinand_manufacturer = { 100 .id = SPINAND_MFR_UNIM, 101 .name = "UNIM", 102 .chips = unim_spinand_table, 103 .nchips = ARRAY_SIZE(unim_spinand_table), 104 .ops = &unim_spinand_manuf_ops, 105 }; 106