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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2005, Intec Automation Inc.
* Copyright (C) 2014, Freescale Semiconductor, Inc.
*/
#include <linux/mtd/spi-nor.h>
#include "core.h"
/* SST flash_info mfr_flag. Used to specify SST byte programming. */
#define SST_WRITE BIT(0)
#define SST26VF_CR_BPNV BIT(3)
static int sst26vf_nor_lock(struct spi_nor *nor, loff_t ofs, u64 len)
{
return -EOPNOTSUPP;
}
static int sst26vf_nor_unlock(struct spi_nor *nor, loff_t ofs, u64 len)
{
int ret;
/* We only support unlocking the entire flash array. */
if (ofs != 0 || len != nor->params->size)
return -EINVAL;
ret = spi_nor_read_cr(nor, nor->bouncebuf);
if (ret)
return ret;
if (!(nor->bouncebuf[0] & SST26VF_CR_BPNV)) {
dev_dbg(nor->dev, "Any block has been permanently locked\n");
return -EINVAL;
}
return spi_nor_global_block_unlock(nor);
}
static int sst26vf_nor_is_locked(struct spi_nor *nor, loff_t ofs, u64 len)
{
return -EOPNOTSUPP;
}
static const struct spi_nor_locking_ops sst26vf_nor_locking_ops = {
.lock = sst26vf_nor_lock,
.unlock = sst26vf_nor_unlock,
.is_locked = sst26vf_nor_is_locked,
};
static int sst26vf_nor_late_init(struct spi_nor *nor)
{
nor->params->locking_ops = &sst26vf_nor_locking_ops;
return 0;
}
static const struct spi_nor_fixups sst26vf_nor_fixups = {
.late_init = sst26vf_nor_late_init,
};
static const struct flash_info sst_nor_parts[] = {
{
.id = SNOR_ID(0x62, 0x16, 0x12),
.name = "sst25wf020a",
.size = SZ_256K,
.flags = SPI_NOR_HAS_LOCK,
.no_sfdp_flags = SECT_4K,
}, {
.id = SNOR_ID(0x62, 0x16, 0x13),
.name = "sst25wf040b",
.size = SZ_512K,
.flags = SPI_NOR_HAS_LOCK,
.no_sfdp_flags = SECT_4K,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x01),
.name = "sst25wf512",
.size = SZ_64K,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x02),
.name = "sst25wf010",
.size = SZ_128K,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x03),
.name = "sst25wf020",
.size = SZ_256K,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x04),
.name = "sst25wf040",
.size = SZ_512K,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x05),
.name = "sst25wf080",
.size = SZ_1M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x41),
.name = "sst25vf016b",
.size = SZ_2M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x4a),
.name = "sst25vf032b",
.size = SZ_4M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x4b),
.name = "sst25vf064c",
.size = SZ_8M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_4BIT_BP | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x8d),
.name = "sst25vf040b",
.size = SZ_512K,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x25, 0x8e),
.name = "sst25vf080b",
.size = SZ_1M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K,
.mfr_flags = SST_WRITE,
}, {
.id = SNOR_ID(0xbf, 0x26, 0x41),
.name = "sst26vf016b",
.size = SZ_2M,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ,
}, {
.id = SNOR_ID(0xbf, 0x26, 0x42),
.name = "sst26vf032b",
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.fixups = &sst26vf_nor_fixups,
}, {
.id = SNOR_ID(0xbf, 0x26, 0x43),
.name = "sst26vf064b",
.size = SZ_8M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
.fixups = &sst26vf_nor_fixups,
}, {
.id = SNOR_ID(0xbf, 0x26, 0x51),
.name = "sst26wf016b",
.size = SZ_2M,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
}
};
static int sst_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
struct spi_nor *nor = mtd_to_spi_nor(mtd);
size_t actual = 0;
int ret;
dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
ret = spi_nor_prep_and_lock(nor);
if (ret)
return ret;
ret = spi_nor_write_enable(nor);
if (ret)
goto out;
nor->sst_write_second = false;
/* Start write from odd address. */
if (to % 2) {
nor->program_opcode = SPINOR_OP_BP;
/* write one byte. */
ret = spi_nor_write_data(nor, to, 1, buf);
if (ret < 0)
goto out;
WARN(ret != 1, "While writing 1 byte written %i bytes\n", ret);
ret = spi_nor_wait_till_ready(nor);
if (ret)
goto out;
to++;
actual++;
}
/* Write out most of the data here. */
for (; actual < len - 1; actual += 2) {
nor->program_opcode = SPINOR_OP_AAI_WP;
/* write two bytes. */
ret = spi_nor_write_data(nor, to, 2, buf + actual);
if (ret < 0)
goto out;
WARN(ret != 2, "While writing 2 bytes written %i bytes\n", ret);
ret = spi_nor_wait_till_ready(nor);
if (ret)
goto out;
to += 2;
nor->sst_write_second = true;
}
nor->sst_write_second = false;
ret = spi_nor_write_disable(nor);
if (ret)
goto out;
ret = spi_nor_wait_till_ready(nor);
if (ret)
goto out;
/* Write out trailing byte if it exists. */
if (actual != len) {
ret = spi_nor_write_enable(nor);
if (ret)
goto out;
nor->program_opcode = SPINOR_OP_BP;
ret = spi_nor_write_data(nor, to, 1, buf + actual);
if (ret < 0)
goto out;
WARN(ret != 1, "While writing 1 byte written %i bytes\n", ret);
ret = spi_nor_wait_till_ready(nor);
if (ret)
goto out;
actual += 1;
ret = spi_nor_write_disable(nor);
}
out:
*retlen += actual;
spi_nor_unlock_and_unprep(nor);
return ret;
}
static int sst_nor_late_init(struct spi_nor *nor)
{
if (nor->info->mfr_flags & SST_WRITE)
nor->mtd._write = sst_nor_write;
return 0;
}
static const struct spi_nor_fixups sst_nor_fixups = {
.late_init = sst_nor_late_init,
};
const struct spi_nor_manufacturer spi_nor_sst = {
.name = "sst",
.parts = sst_nor_parts,
.nparts = ARRAY_SIZE(sst_nor_parts),
.fixups = &sst_nor_fixups,
};
|
