foresee.c

  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
 14static SPINAND_OP_VARIANTS(read_cache_variants,
 15		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),
 16		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),
 17		SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0),
 18		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0));
 19
 20static SPINAND_OP_VARIANTS(write_cache_variants,
 21		SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),
 22		SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
 23
 24static SPINAND_OP_VARIANTS(update_cache_variants,
 25		SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),
 26		SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
 27
 28static int f35sqa002g_ooblayout_ecc(struct mtd_info *mtd, int section,
 29				    struct mtd_oob_region *region)
 30{
 31	return -ERANGE;
 32}
 33
 34static 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
 47static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = {
 48	.ecc = f35sqa002g_ooblayout_ecc,
 49	.free = f35sqa002g_ooblayout_free,
 50};
 51
 52static 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
 73static 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	SPINAND_INFO("F35SQA001G",
 85		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71, 0x71),
 86		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
 87		     NAND_ECCREQ(1, 512),
 88		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 89					      &write_cache_variants,
 90					      &update_cache_variants),
 91		     SPINAND_HAS_QE_BIT,
 92		     SPINAND_ECCINFO(&f35sqa002g_ooblayout,
 93				     f35sqa002g_ecc_get_status)),
 94};
 95
 96static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = {
 97};
 98
 99const struct spinand_manufacturer foresee_spinand_manufacturer = {
100	.id = SPINAND_MFR_FORESEE,
101	.name = "FORESEE",
102	.chips = foresee_spinand_table,
103	.nchips = ARRAY_SIZE(foresee_spinand_table),
104	.ops = &foresee_spinand_manuf_ops,
105};