1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2017 exceet electronics GmbH
6 * Frieder Schrempf <frieder.schrempf@exceet.de>
7 * Boris Brezillon <boris.brezillon@bootlin.com>
10 #include <linux/device.h>
11 #include <linux/kernel.h>
12 #include <linux/mtd/spinand.h>
14 #define SPINAND_MFR_WINBOND 0xEF
16 #define WINBOND_CFG_BUF_READ BIT(3)
18 static SPINAND_OP_VARIANTS(read_cache_variants,
19 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
20 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
21 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
22 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
23 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
24 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
26 static SPINAND_OP_VARIANTS(write_cache_variants,
27 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
28 SPINAND_PROG_LOAD(true, 0, NULL, 0));
30 static SPINAND_OP_VARIANTS(update_cache_variants,
31 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
32 SPINAND_PROG_LOAD(false, 0, NULL, 0));
34 static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,
35 struct mtd_oob_region *region)
40 region->offset = (16 * section) + 8;
46 static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section,
47 struct mtd_oob_region *region)
52 region->offset = (16 * section) + 2;
58 static const struct mtd_ooblayout_ops w25m02gv_ooblayout = {
59 .ecc = w25m02gv_ooblayout_ecc,
60 .free = w25m02gv_ooblayout_free,
63 static int w25m02gv_select_target(struct spinand_device *spinand,
66 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1),
69 SPI_MEM_OP_DATA_OUT(1,
73 *spinand->scratchbuf = target;
74 return spi_mem_exec_op(spinand->spimem, &op);
77 static const struct spinand_info winbond_spinand_table[] = {
78 SPINAND_INFO("W25M02GV",
79 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab),
80 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 2),
82 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
83 &write_cache_variants,
84 &update_cache_variants),
86 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),
87 SPINAND_SELECT_TARGET(w25m02gv_select_target)),
88 SPINAND_INFO("W25N01GV",
89 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa),
90 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
92 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
93 &write_cache_variants,
94 &update_cache_variants),
96 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
99 static int winbond_spinand_init(struct spinand_device *spinand)
101 struct nand_device *nand = spinand_to_nand(spinand);
105 * Make sure all dies are in buffer read mode and not continuous read
108 for (i = 0; i < nand->memorg.ntargets; i++) {
109 spinand_select_target(spinand, i);
110 spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ,
111 WINBOND_CFG_BUF_READ);
117 static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {
118 .init = winbond_spinand_init,
121 const struct spinand_manufacturer winbond_spinand_manufacturer = {
122 .id = SPINAND_MFR_WINBOND,
124 .chips = winbond_spinand_table,
125 .nchips = ARRAY_SIZE(winbond_spinand_table),
126 .ops = &winbond_spinand_manuf_ops,