1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2019 Jeff Kletsky
5 * Author: Jeff Kletsky <git-commits@allycomm.com>
8 #include <linux/device.h>
9 #include <linux/kernel.h>
10 #include <linux/mtd/spinand.h>
13 #define SPINAND_MFR_PARAGON 0xa1
16 #define PN26G0XA_STATUS_ECC_BITMASK (3 << 4)
18 #define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4)
19 #define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4)
20 #define PN26G0XA_STATUS_ECC_ERRORED (2 << 4)
21 #define PN26G0XA_STATUS_ECC_8_CORRECTED (3 << 4)
24 static SPINAND_OP_VARIANTS(read_cache_variants,
25 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
26 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
27 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
28 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
29 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
30 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
32 static SPINAND_OP_VARIANTS(write_cache_variants,
33 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
34 SPINAND_PROG_LOAD(true, 0, NULL, 0));
36 static SPINAND_OP_VARIANTS(update_cache_variants,
37 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
38 SPINAND_PROG_LOAD(false, 0, NULL, 0));
41 static int pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,
42 struct mtd_oob_region *region)
47 region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */
53 static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section,
54 struct mtd_oob_region *region)
63 region->offset = 4 + (15 * section);
70 static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,
73 switch (status & PN26G0XA_STATUS_ECC_BITMASK) {
74 case PN26G0XA_STATUS_ECC_NONE_DETECTED:
77 case PN26G0XA_STATUS_ECC_1_7_CORRECTED:
78 return 7; /* Return upper limit by convention */
80 case PN26G0XA_STATUS_ECC_8_CORRECTED:
83 case PN26G0XA_STATUS_ECC_ERRORED:
93 static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {
94 .ecc = pn26g0xa_ooblayout_ecc,
95 .free = pn26g0xa_ooblayout_free,
99 static const struct spinand_info paragon_spinand_table[] = {
100 SPINAND_INFO("PN26G01A",
101 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe1),
102 NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1),
104 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
105 &write_cache_variants,
106 &update_cache_variants),
108 SPINAND_ECCINFO(&pn26g0xa_ooblayout,
109 pn26g0xa_ecc_get_status)),
110 SPINAND_INFO("PN26G02A",
111 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe2),
112 NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1),
114 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
115 &write_cache_variants,
116 &update_cache_variants),
118 SPINAND_ECCINFO(&pn26g0xa_ooblayout,
119 pn26g0xa_ecc_get_status)),
122 static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {
125 const struct spinand_manufacturer paragon_spinand_manufacturer = {
126 .id = SPINAND_MFR_PARAGON,
128 .chips = paragon_spinand_table,
129 .nchips = ARRAY_SIZE(paragon_spinand_table),
130 .ops = ¶gon_spinand_manuf_ops,