1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2022 Aidan MacDonald 4 * 5 * Author: Aidan MacDonald <aidanmacdonald.0x0@gmail.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_ATO 0x9b 14 15 16 static SPINAND_OP_VARIANTS(read_cache_variants, 17 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 18 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 19 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 20 21 static SPINAND_OP_VARIANTS(write_cache_variants, 22 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 23 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 24 25 static SPINAND_OP_VARIANTS(update_cache_variants, 26 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 27 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 28 29 30 static int ato25d1ga_ooblayout_ecc(struct mtd_info *mtd, int section, 31 struct mtd_oob_region *region) 32 { 33 if (section > 3) 34 return -ERANGE; 35 36 region->offset = (16 * section) + 8; 37 region->length = 8; 38 return 0; 39 } 40 41 static int ato25d1ga_ooblayout_free(struct mtd_info *mtd, int section, 42 struct mtd_oob_region *region) 43 { 44 if (section > 3) 45 return -ERANGE; 46 47 if (section) { 48 region->offset = (16 * section); 49 region->length = 8; 50 } else { 51 /* first byte of section 0 is reserved for the BBM */ 52 region->offset = 1; 53 region->length = 7; 54 } 55 56 return 0; 57 } 58 59 static const struct mtd_ooblayout_ops ato25d1ga_ooblayout = { 60 .ecc = ato25d1ga_ooblayout_ecc, 61 .free = ato25d1ga_ooblayout_free, 62 }; 63 64 65 static const struct spinand_info ato_spinand_table[] = { 66 SPINAND_INFO("ATO25D1GA", 67 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x12), 68 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), 69 NAND_ECCREQ(1, 512), 70 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 71 &write_cache_variants, 72 &update_cache_variants), 73 SPINAND_HAS_QE_BIT, 74 SPINAND_ECCINFO(&ato25d1ga_ooblayout, NULL)), 75 }; 76 77 static const struct spinand_manufacturer_ops ato_spinand_manuf_ops = { 78 }; 79 80 const struct spinand_manufacturer ato_spinand_manufacturer = { 81 .id = SPINAND_MFR_ATO, 82 .name = "ATO", 83 .chips = ato_spinand_table, 84 .nchips = ARRAY_SIZE(ato_spinand_table), 85 .ops = &ato_spinand_manuf_ops, 86 }; 87