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 static SPINAND_OP_VARIANTS(read_cache_variants, 15 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 16 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 17 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 18 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 19 20 static SPINAND_OP_VARIANTS(write_cache_variants, 21 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 22 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 23 24 static SPINAND_OP_VARIANTS(update_cache_variants, 25 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 26 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 27 28 static int f35sqa002g_ooblayout_ecc(struct mtd_info *mtd, int section, 29 struct mtd_oob_region *region) 30 { 31 return -ERANGE; 32 } 33 34 static int f35sqa002g_ooblayout_free(struct mtd_info *mtd, int section, 35 struct mtd_oob_region *region) 36 { 37 if (section) 38 return -ERANGE; 39 40 /* Reserve 2 bytes for the BBM. */ 41 region->offset = 2; 42 region->length = 62; 43 44 return 0; 45 } 46 47 static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = { 48 .ecc = f35sqa002g_ooblayout_ecc, 49 .free = f35sqa002g_ooblayout_free, 50 }; 51 52 static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status) 53 { 54 struct nand_device *nand = spinand_to_nand(spinand); 55 56 switch (status & STATUS_ECC_MASK) { 57 case STATUS_ECC_NO_BITFLIPS: 58 return 0; 59 60 case STATUS_ECC_HAS_BITFLIPS: 61 return nanddev_get_ecc_conf(nand)->strength; 62 63 default: 64 break; 65 } 66 67 /* More than 1-bit error was detected in one or more sectors and 68 * cannot be corrected. 69 */ 70 return -EBADMSG; 71 } 72 73 static const struct spinand_info foresee_spinand_table[] = { 74 SPINAND_INFO("F35SQA002G", 75 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72), 76 NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1), 77 NAND_ECCREQ(1, 512), 78 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 79 &write_cache_variants, 80 &update_cache_variants), 81 SPINAND_HAS_QE_BIT, 82 SPINAND_ECCINFO(&f35sqa002g_ooblayout, 83 f35sqa002g_ecc_get_status)), 84 }; 85 86 static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = { 87 }; 88 89 const struct spinand_manufacturer foresee_spinand_manufacturer = { 90 .id = SPINAND_MFR_FORESEE, 91 .name = "FORESEE", 92 .chips = foresee_spinand_table, 93 .nchips = ARRAY_SIZE(foresee_spinand_table), 94 .ops = &foresee_spinand_manuf_ops, 95 }; 96