aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/pending-5.15/487-mtd-spinand-Add-support-for-Etron-EM73D044VCx.patch
blob: c32e15d0c642d7bfd8d9ab0bf7d9ebeb8f13d679 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
-spinand-objs := core.o esmt.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
+spinand-objs := core.o esmt.o etron.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
 obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -898,6 +898,7 @@ static const struct nand_ops spinand_ops
 static const struct spinand_manufacturer *spinand_manufacturers[] = {
 	&esmt_c8_spinand_manufacturer,
 	&gigadevice_spinand_manufacturer,
+	&etron_spinand_manufacturer,
 	&macronix_spinand_manufacturer,
 	&micron_spinand_manufacturer,
 	&paragon_spinand_manufacturer,
--- /dev/null
+++ b/drivers/mtd/nand/spi/etron.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_ETRON			0xd5
+
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+
+static SPINAND_OP_VARIANTS(write_cache_variants,
+		SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
+		SPINAND_PROG_LOAD(true, 0, NULL, 0));
+
+static SPINAND_OP_VARIANTS(update_cache_variants,
+		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
+		SPINAND_PROG_LOAD(false, 0, NULL, 0));
+
+static int etron_ooblayout_ecc(struct mtd_info *mtd, int section,
+					struct mtd_oob_region *oobregion)
+{
+	if (section)
+		return -ERANGE;
+
+	oobregion->offset = 72;
+	oobregion->length = 56;
+
+	return 0;
+}
+
+static int etron_ooblayout_free(struct mtd_info *mtd, int section,
+			   struct mtd_oob_region *oobregion)
+{
+	if (section)
+		return -ERANGE;
+
+	oobregion->offset = 1;
+	oobregion->length = 71;
+
+	return 0;
+}
+
+static int etron_ecc_get_status(struct spinand_device *spinand, u8 status)
+{
+	switch (status & STATUS_ECC_MASK) {
+	case STATUS_ECC_NO_BITFLIPS:
+		return 0;
+
+	case STATUS_ECC_HAS_BITFLIPS:
+		/* Between 1-7 bitflips were corrected */
+		return 7;
+
+	case STATUS_ECC_MASK:
+		/* Maximum bitflips were corrected */
+		return 8;
+
+	case STATUS_ECC_UNCOR_ERROR:
+		return -EBADMSG;
+	}
+
+	return -EINVAL;
+}
+
+static const struct mtd_ooblayout_ops etron_ooblayout = {
+	.ecc = etron_ooblayout_ecc,
+	.free = etron_ooblayout_free,
+};
+
+static const struct spinand_info etron_spinand_table[] = {
+	SPINAND_INFO("EM73D044VCx",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x1f),
+		     // bpc, pagesize, oobsize, pagesperblock, bperlun, maxbadplun, ppl, lpt, #t
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+};
+
+static const struct spinand_manufacturer_ops etron_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer etron_spinand_manufacturer = {
+	.id = SPINAND_MFR_ETRON,
+	.name = "Etron",
+	.chips = etron_spinand_table,
+	.nchips = ARRAY_SIZE(etron_spinand_table),
+	.ops = &etron_spinand_manuf_ops,
+};
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -261,6 +261,7 @@ struct spinand_manufacturer {
 
 /* SPI NAND manufacturers */
 extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
+extern const struct spinand_manufacturer etron_spinand_manufacturer;
 extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 extern const struct spinand_manufacturer micron_spinand_manufacturer;