1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2020 Grandstream Networks, Inc 4 * 5 * Authors: 6 * Carl <xjxia@grandstream.cn> 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_ESMT 0xC8 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 f50lxx41x_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 f50lxx41x_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 f50lxx41x_ooblayout = { 58 .ecc = f50lxx41x_ooblayout_ecc, 59 .rfree = f50lxx41x_ooblayout_free, 60 }; 61 62 static const struct spinand_info esmt_spinand_table[] = { 63 SPINAND_INFO("F50L1G41LB", 0x01, 64 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1), 65 NAND_ECCREQ(1, 512), 66 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 67 &write_cache_variants, 68 &update_cache_variants), 69 0, 70 SPINAND_ECCINFO(&f50lxx41x_ooblayout, NULL)), 71 }; 72 73 /** 74 * esmt_spinand_detect - initialize device related part in spinand_device 75 * struct if it is a esmt device. 76 * @spinand: SPI NAND device structure 77 */ 78 static int esmt_spinand_detect(struct spinand_device *spinand) 79 { 80 u8 *id = spinand->id.data; 81 int ret; 82 83 /* 84 * esmt SPI NAND read ID need a dummy byte, 85 * so the first byte in raw_id is dummy. 86 */ 87 if (id[1] != SPINAND_MFR_ESMT) 88 return 0; 89 90 ret = spinand_match_and_init(spinand, esmt_spinand_table, 91 ARRAY_SIZE(esmt_spinand_table), id[2]); 92 /* Not Only ESMT Nands MFR equals C8h */ 93 if (ret) 94 return 0; 95 96 return 1; 97 } 98 99 static int esmt_spinand_init(struct spinand_device *spinand) 100 { 101 return 0; 102 } 103 104 static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = { 105 .detect = esmt_spinand_detect, 106 .init = esmt_spinand_init, 107 }; 108 109 const struct spinand_manufacturer esmt_spinand_manufacturer = { 110 .id = SPINAND_MFR_ESMT, 111 .name = "esmt", 112 .ops = &esmt_spinand_manuf_ops, 113 }; 114