1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2019 Jeff Kletsky 4 * 5 * Author: Jeff Kletsky <git-commits@allycomm.com> 6 */ 7 8 #include <linux/device.h> 9 #include <linux/kernel.h> 10 #include <linux/mtd/spinand.h> 11 12 13 #define SPINAND_MFR_PARAGON 0xa1 14 15 16 #define PN26G0XA_STATUS_ECC_BITMASK (3 << 4) 17 18 #define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4) 19 #define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4) 20 #define PN26G0XA_STATUS_ECC_ERRORED (2 << 4) 21 #define PN26G0XA_STATUS_ECC_8_CORRECTED (3 << 4) 22 23 24 static SPINAND_OP_VARIANTS(read_cache_variants, 25 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), 26 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 27 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0), 28 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 29 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 30 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 31 32 static SPINAND_OP_VARIANTS(write_cache_variants, 33 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 34 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 35 36 static SPINAND_OP_VARIANTS(update_cache_variants, 37 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 38 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 39 40 41 static int pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section, 42 struct mtd_oob_region *region) 43 { 44 if (section > 3) 45 return -ERANGE; 46 47 region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */ 48 region->length = 13; 49 50 return 0; 51 } 52 53 static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section, 54 struct mtd_oob_region *region) 55 { 56 if (section > 4) 57 return -ERANGE; 58 59 if (section == 4) { 60 region->offset = 64; 61 region->length = 64; 62 } else { 63 region->offset = 4 + (15 * section); 64 region->length = 2; 65 } 66 67 return 0; 68 } 69 70 static int pn26g0xa_ecc_get_status(struct spinand_device *spinand, 71 u8 status) 72 { 73 switch (status & PN26G0XA_STATUS_ECC_BITMASK) { 74 case PN26G0XA_STATUS_ECC_NONE_DETECTED: 75 return 0; 76 77 case PN26G0XA_STATUS_ECC_1_7_CORRECTED: 78 return 7; /* Return upper limit by convention */ 79 80 case PN26G0XA_STATUS_ECC_8_CORRECTED: 81 return 8; 82 83 case PN26G0XA_STATUS_ECC_ERRORED: 84 return -EBADMSG; 85 86 default: 87 break; 88 } 89 90 return -EINVAL; 91 } 92 93 static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = { 94 .ecc = pn26g0xa_ooblayout_ecc, 95 .free = pn26g0xa_ooblayout_free, 96 }; 97 98 99 static const struct spinand_info paragon_spinand_table[] = { 100 SPINAND_INFO("PN26G01A", 101 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe1), 102 NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1), 103 NAND_ECCREQ(8, 512), 104 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 105 &write_cache_variants, 106 &update_cache_variants), 107 0, 108 SPINAND_ECCINFO(&pn26g0xa_ooblayout, 109 pn26g0xa_ecc_get_status)), 110 SPINAND_INFO("PN26G02A", 111 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe2), 112 NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1), 113 NAND_ECCREQ(8, 512), 114 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 115 &write_cache_variants, 116 &update_cache_variants), 117 0, 118 SPINAND_ECCINFO(&pn26g0xa_ooblayout, 119 pn26g0xa_ecc_get_status)), 120 }; 121 122 static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = { 123 }; 124 125 const struct spinand_manufacturer paragon_spinand_manufacturer = { 126 .id = SPINAND_MFR_PARAGON, 127 .name = "Paragon", 128 .chips = paragon_spinand_table, 129 .nchips = ARRAY_SIZE(paragon_spinand_table), 130 .ops = ¶gon_spinand_manuf_ops, 131 }; 132