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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2017 exceet electronics GmbH4 *5 * Authors:6 *	Frieder Schrempf <frieder.schrempf@exceet.de>7 *	Boris Brezillon <boris.brezillon@bootlin.com>8 */9 10#include <linux/device.h>11#include <linux/kernel.h>12#include <linux/mtd/spinand.h>13 14#define SPINAND_MFR_WINBOND		0xEF15 16#define WINBOND_CFG_BUF_READ		BIT(3)17 18#define W25N04KV_STATUS_ECC_5_8_BITFLIPS	(3 << 4)19 20static SPINAND_OP_VARIANTS(read_cache_variants,21		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),22		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),23		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),24		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),25		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),26		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));27 28static SPINAND_OP_VARIANTS(write_cache_variants,29		SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),30		SPINAND_PROG_LOAD(true, 0, NULL, 0));31 32static SPINAND_OP_VARIANTS(update_cache_variants,33		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),34		SPINAND_PROG_LOAD(false, 0, NULL, 0));35 36static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,37				  struct mtd_oob_region *region)38{39	if (section > 3)40		return -ERANGE;41 42	region->offset = (16 * section) + 8;43	region->length = 8;44 45	return 0;46}47 48static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section,49				   struct mtd_oob_region *region)50{51	if (section > 3)52		return -ERANGE;53 54	region->offset = (16 * section) + 2;55	region->length = 6;56 57	return 0;58}59 60static const struct mtd_ooblayout_ops w25m02gv_ooblayout = {61	.ecc = w25m02gv_ooblayout_ecc,62	.free = w25m02gv_ooblayout_free,63};64 65static int w25m02gv_select_target(struct spinand_device *spinand,66				  unsigned int target)67{68	struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1),69					  SPI_MEM_OP_NO_ADDR,70					  SPI_MEM_OP_NO_DUMMY,71					  SPI_MEM_OP_DATA_OUT(1,72							spinand->scratchbuf,73							1));74 75	*spinand->scratchbuf = target;76	return spi_mem_exec_op(spinand->spimem, &op);77}78 79static int w25n01kv_ooblayout_ecc(struct mtd_info *mtd, int section,80				  struct mtd_oob_region *region)81{82	if (section > 3)83		return -ERANGE;84 85	region->offset = 64 + (8 * section);86	region->length = 7;87 88	return 0;89}90 91static int w25n02kv_ooblayout_ecc(struct mtd_info *mtd, int section,92				  struct mtd_oob_region *region)93{94	if (section > 3)95		return -ERANGE;96 97	region->offset = 64 + (16 * section);98	region->length = 13;99 100	return 0;101}102 103static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section,104				   struct mtd_oob_region *region)105{106	if (section > 3)107		return -ERANGE;108 109	region->offset = (16 * section) + 2;110	region->length = 14;111 112	return 0;113}114 115static const struct mtd_ooblayout_ops w25n01kv_ooblayout = {116	.ecc = w25n01kv_ooblayout_ecc,117	.free = w25n02kv_ooblayout_free,118};119 120static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {121	.ecc = w25n02kv_ooblayout_ecc,122	.free = w25n02kv_ooblayout_free,123};124 125static int w25n02kv_ecc_get_status(struct spinand_device *spinand,126				   u8 status)127{128	struct nand_device *nand = spinand_to_nand(spinand);129	u8 mbf = 0;130	struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, spinand->scratchbuf);131 132	switch (status & STATUS_ECC_MASK) {133	case STATUS_ECC_NO_BITFLIPS:134		return 0;135 136	case STATUS_ECC_UNCOR_ERROR:137		return -EBADMSG;138 139	case STATUS_ECC_HAS_BITFLIPS:140	case W25N04KV_STATUS_ECC_5_8_BITFLIPS:141		/*142		 * Let's try to retrieve the real maximum number of bitflips143		 * in order to avoid forcing the wear-leveling layer to move144		 * data around if it's not necessary.145		 */146		if (spi_mem_exec_op(spinand->spimem, &op))147			return nanddev_get_ecc_conf(nand)->strength;148 149		mbf = *(spinand->scratchbuf) >> 4;150 151		if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf))152			return nanddev_get_ecc_conf(nand)->strength;153 154		return mbf;155 156	default:157		break;158	}159 160	return -EINVAL;161}162 163static const struct spinand_info winbond_spinand_table[] = {164	SPINAND_INFO("W25M02GV",165		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab, 0x21),166		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 2),167		     NAND_ECCREQ(1, 512),168		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,169					      &write_cache_variants,170					      &update_cache_variants),171		     0,172		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),173		     SPINAND_SELECT_TARGET(w25m02gv_select_target)),174	SPINAND_INFO("W25N01GV",175		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x21),176		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),177		     NAND_ECCREQ(1, 512),178		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,179					      &write_cache_variants,180					      &update_cache_variants),181		     0,182		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),183	SPINAND_INFO("W25N01KV",184		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae, 0x21),185		     NAND_MEMORG(1, 2048, 96, 64, 1024, 20, 1, 1, 1),186		     NAND_ECCREQ(4, 512),187		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,188					      &write_cache_variants,189					      &update_cache_variants),190		     0,191		     SPINAND_ECCINFO(&w25n01kv_ooblayout, w25n02kv_ecc_get_status)),192	SPINAND_INFO("W25N02KV",193		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x22),194		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),195		     NAND_ECCREQ(8, 512),196		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,197					      &write_cache_variants,198					      &update_cache_variants),199		     0,200		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),201	SPINAND_INFO("W25N01JW",202		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbc, 0x21),203		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),204		     NAND_ECCREQ(4, 512),205		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,206					      &write_cache_variants,207					      &update_cache_variants),208		     0,209		     SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)),210	SPINAND_INFO("W25N02JWZEIF",211		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbf, 0x22),212		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 2, 1),213		     NAND_ECCREQ(4, 512),214		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,215					      &write_cache_variants,216					      &update_cache_variants),217		     0,218		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),219	SPINAND_INFO("W25N512GW",220		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x20),221		     NAND_MEMORG(1, 2048, 64, 64, 512, 10, 1, 1, 1),222		     NAND_ECCREQ(4, 512),223		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,224					      &write_cache_variants,225					      &update_cache_variants),226		     0,227		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),228	SPINAND_INFO("W25N02KWZEIR",229		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x22),230		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),231		     NAND_ECCREQ(8, 512),232		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,233					      &write_cache_variants,234					      &update_cache_variants),235		     0,236		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),237	SPINAND_INFO("W25N01GWZEIG",238		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x21),239		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),240		     NAND_ECCREQ(4, 512),241		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,242					      &write_cache_variants,243					      &update_cache_variants),244		     0,245		     SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)),246	SPINAND_INFO("W25N04KV",247		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x23),248		     NAND_MEMORG(1, 2048, 128, 64, 4096, 40, 2, 1, 1),249		     NAND_ECCREQ(8, 512),250		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,251					      &write_cache_variants,252					      &update_cache_variants),253		     0,254		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),255};256 257static int winbond_spinand_init(struct spinand_device *spinand)258{259	struct nand_device *nand = spinand_to_nand(spinand);260	unsigned int i;261 262	/*263	 * Make sure all dies are in buffer read mode and not continuous read264	 * mode.265	 */266	for (i = 0; i < nand->memorg.ntargets; i++) {267		spinand_select_target(spinand, i);268		spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ,269				WINBOND_CFG_BUF_READ);270	}271 272	return 0;273}274 275static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {276	.init = winbond_spinand_init,277};278 279const struct spinand_manufacturer winbond_spinand_manufacturer = {280	.id = SPINAND_MFR_WINBOND,281	.name = "Winbond",282	.chips = winbond_spinand_table,283	.nchips = ARRAY_SIZE(winbond_spinand_table),284	.ops = &winbond_spinand_manuf_ops,285};286