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
|
/*
* Copyright (c) 2012, Google Inc.
*
* Based on drivers/spi/winbond.c
*
* Copyright 2008, Network Appliance Inc.
* Jason McMullan <mcmullan@netapp.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <stdlib.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
/* GD25Pxx-specific commands */
#define CMD_GD25_WREN 0x06 /* Write Enable */
#define CMD_GD25_WRDI 0x04 /* Write Disable */
#define CMD_GD25_RDSR 0x05 /* Read Status Register */
#define CMD_GD25_WRSR 0x01 /* Write Status Register */
#define CMD_GD25_READ 0x03 /* Read Data Bytes */
#define CMD_GD25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_GD25_PP 0x02 /* Page Program */
#define CMD_GD25_SE 0x20 /* Sector (4K) Erase */
#define CMD_GD25_BE 0xd8 /* Block (64K) Erase */
#define CMD_GD25_CE 0xc7 /* Chip Erase */
#define CMD_GD25_DP 0xb9 /* Deep Power-down */
#define CMD_GD25_RES 0xab /* Release from DP, and Read Signature */
struct gigadevice_spi_flash_params {
uint16_t id;
/* Log2 of page size in power-of-two mode */
uint8_t l2_page_size;
uint16_t pages_per_sector;
uint16_t sectors_per_block;
uint16_t nr_blocks;
const char *name;
};
/* spi_flash needs to be first so upper layers can free() it */
struct gigadevice_spi_flash {
struct spi_flash flash;
const struct gigadevice_spi_flash_params *params;
};
static inline struct gigadevice_spi_flash *
to_gigadevice_spi_flash(struct spi_flash *flash)
{
return container_of(flash, struct gigadevice_spi_flash, flash);
}
static const struct gigadevice_spi_flash_params gigadevice_spi_flash_table[] = {
{
.id = 0x4014,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 16,
.name = "GD25Q80",
},
{
.id = 0x4015,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 32,
.name = "GD25Q16(B)",
},
{
.id = 0x4016,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 64,
.name = "GD25Q32(B)",
},
{
.id = 0x6016,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 64,
.name = "GD25LQ32",
},
{
.id = 0x4017,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 128,
.name = "GD25Q64(B)",
},
{
.id = 0x4018,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 256,
.name = "GD25Q128(B)",
},
};
static int gigadevice_write(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
{
struct gigadevice_spi_flash *stm = to_gigadevice_spi_flash(flash);
unsigned long byte_addr;
unsigned long page_size;
size_t chunk_len;
size_t actual;
int ret;
u8 cmd[4];
page_size = 1 << stm->params->l2_page_size;
byte_addr = offset % page_size;
flash->spi->rw = SPI_WRITE_FLAG;
ret = spi_claim_bus(flash->spi);
if (ret) {
printk(BIOS_WARNING,
"SF gigadevice.c: Unable to claim SPI bus\n");
return ret;
}
for (actual = 0; actual < len; actual += chunk_len) {
chunk_len = min(len - actual, page_size - byte_addr);
chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT);
ret = spi_flash_cmd(flash->spi, CMD_GD25_WREN, NULL, 0);
if (ret < 0) {
printk(BIOS_WARNING,
"SF gigadevice.c: Enabling Write failed\n");
goto out;
}
cmd[0] = CMD_GD25_PP;
cmd[1] = (offset >> 16) & 0xff;
cmd[2] = (offset >> 8) & 0xff;
cmd[3] = offset & 0xff;
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW,
"PP gigadevice.c: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x }"
" chunk_len = %zu\n", buf + actual,
cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
#endif
ret = spi_flash_cmd_write(flash->spi, cmd, 4,
buf + actual, chunk_len);
if (ret < 0) {
printk(BIOS_WARNING,
"SF gigadevice.c: Page Program failed\n");
goto out;
}
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret)
goto out;
offset += chunk_len;
byte_addr = 0;
}
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW,
"SF gigadevice.c: Successfully programmed %zu bytes @ %#x\n",
len, (unsigned int)(offset - len));
#endif
ret = 0;
out:
spi_release_bus(flash->spi);
return ret;
}
static int gigadevice_erase(struct spi_flash *flash, u32 offset, size_t len)
{
return spi_flash_cmd_erase(flash, CMD_GD25_SE, offset, len);
}
struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
{
const struct gigadevice_spi_flash_params *params;
unsigned page_size;
struct gigadevice_spi_flash *stm;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(gigadevice_spi_flash_table); i++) {
params = &gigadevice_spi_flash_table[i];
if (params->id == ((idcode[1] << 8) | idcode[2]))
break;
}
if (i == ARRAY_SIZE(gigadevice_spi_flash_table)) {
printk(BIOS_WARNING,
"SF gigadevice.c: Unsupported ID %#02x%02x\n",
idcode[1], idcode[2]);
return NULL;
}
stm = malloc(sizeof(struct gigadevice_spi_flash));
if (!stm) {
printk(BIOS_WARNING,
"SF gigadevice.c: Failed to allocate memory\n");
return NULL;
}
stm->params = params;
stm->flash.spi = spi;
stm->flash.name = params->name;
/* Assuming power-of-two page size initially. */
page_size = 1 << params->l2_page_size;
stm->flash.write = gigadevice_write;
stm->flash.erase = gigadevice_erase;
#if CONFIG_SPI_FLASH_NO_FAST_READ
stm->flash.read = spi_flash_cmd_read_slow;
#else
stm->flash.read = spi_flash_cmd_read_fast;
#endif
stm->flash.sector_size = (1 << stm->params->l2_page_size) *
stm->params->pages_per_sector;
stm->flash.size = page_size * params->pages_per_sector
* params->sectors_per_block
* params->nr_blocks;
return &stm->flash;
}
|