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
|
/*
* SPI flash probing
*
* Copyright (C) 2008 Atmel Corporation
* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <fdtdec.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
DECLARE_GLOBAL_DATA_PTR;
/*
* struct spi_flash_params - SPI/QSPI flash device params structure
*
* @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO])
* @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_id])
* @ext_jedec: Device ext_jedec ID
* @sector_size: Sector size of this device
* @nr_sectors: No.of sectors on this device
*/
struct spi_flash_params {
const char *name;
u32 jedec;
u16 ext_jedec;
u32 sector_size;
u32 nr_sectors;
};
static const struct spi_flash_params spi_flash_params_table[] = {
#ifdef CONFIG_SPI_FLASH_STMICRO /* STMICRO */
{"N25Q32", 0x20ba16, 0x0, 64 * 1024, 64},
{"N25Q32A", 0x20bb16, 0x0, 64 * 1024, 64},
{"N25Q64", 0x20ba17, 0x0, 64 * 1024, 128},
{"N25Q64A", 0x20bb17, 0x0, 64 * 1024, 128},
{"N25Q128", 0x20ba18, 0x0, 64 * 1024, 256},
{"N25Q128A", 0x20bb18, 0x0, 64 * 1024, 256},
{"N25Q256", 0x20ba19, 0x0, 64 * 1024, 512},
{"N25Q256A", 0x20bb19, 0x0, 64 * 1024, 512},
{"N25Q512", 0x20ba20, 0x0, 64 * 1024, 1024},
{"N25Q512A", 0x20bb20, 0x0, 64 * 1024, 1024},
{"N25Q1024", 0x20ba21, 0x0, 64 * 1024, 2048},
{"N25Q1024A", 0x20bb21, 0x0, 64 * 1024, 2048},
#endif
/*
* TODO:
* ATMEL
* EON
* GIGADEVICE
* MACRONIX
* RAMTRON
* SPANSION
* SST
* STMICRO (M25*)
* WINBOND
*/
};
struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
{
const struct spi_flash_params *params;
struct spi_flash *flash;
int i;
u16 jedec = idcode[1] << 8 | idcode[2];
/* Get the flash id (jedec = manuf_id + dev_id) */
for (i = 0; i < ARRAY_SIZE(spi_flash_params_table); i++) {
params = &spi_flash_params_table[i];
if ((params->jedec >> 16) == idcode[0]) {
if ((params->jedec & 0xFFFF) == jedec)
break;
}
}
if (i == ARRAY_SIZE(spi_flash_params_table)) {
printf("SF: Unsupported flash ID: manuf %02x, jedec %04x\n",
idcode[0], jedec);
return NULL;
}
flash = malloc(sizeof(*flash));
if (!flash) {
debug("SF: Failed to allocate spi_flash\n");
return NULL;
}
memset(flash, '\0', sizeof(*flash));
flash->spi = spi;
flash->name = params->name;
flash->poll_cmd = CMD_READ_STATUS;
/* Assign spi_flash ops */
flash->write = spi_flash_cmd_write_multi;
flash->erase = spi_flash_cmd_erase;
flash->read = spi_flash_cmd_read_fast;
/* Compute the flash size */
flash->page_size = 256;
flash->sector_size = params->sector_size;
flash->size = flash->sector_size * params->nr_sectors;
return flash;
}
#ifdef CONFIG_SPI_FLASH_BAR
int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
{
u8 cmd;
u8 curr_bank = 0;
/* discover bank cmds */
switch (idcode0) {
case SPI_FLASH_SPANSION_IDCODE0:
flash->bank_read_cmd = CMD_BANKADDR_BRRD;
flash->bank_write_cmd = CMD_BANKADDR_BRWR;
break;
case SPI_FLASH_STMICRO_IDCODE0:
case SPI_FLASH_WINBOND_IDCODE0:
flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
break;
default:
printf("SF: Unsupported bank commands %02x\n", idcode0);
return -1;
}
/* read the bank reg - on which bank the flash is in currently */
cmd = flash->bank_read_cmd;
if (flash->size > SPI_FLASH_16MB_BOUN) {
if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
debug("SF: fail to read bank addr register\n");
return -1;
}
flash->bank_curr = curr_bank;
} else {
flash->bank_curr = curr_bank;
}
return 0;
}
#endif
#ifdef CONFIG_OF_CONTROL
int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
{
fdt_addr_t addr;
fdt_size_t size;
int node;
/* If there is no node, do nothing */
node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
if (node < 0)
return 0;
addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
if (addr == FDT_ADDR_T_NONE) {
debug("%s: Cannot decode address\n", __func__);
return 0;
}
if (flash->size != size) {
debug("%s: Memory map must cover entire device\n", __func__);
return -1;
}
flash->memory_map = (void *)addr;
return 0;
}
#endif /* CONFIG_OF_CONTROL */
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode)
{
struct spi_slave *spi;
struct spi_flash *flash = NULL;
u8 idcode[5], *idp;
int ret;
/* Setup spi_slave */
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
if (!spi) {
printf("SF: Failed to set up slave\n");
return NULL;
}
/* Claim spi bus */
ret = spi_claim_bus(spi);
if (ret) {
debug("SF: Failed to claim SPI bus: %d\n", ret);
goto err_claim_bus;
}
/* Read the ID codes */
ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
if (ret) {
printf("SF: Failed to get idcodes\n");
goto err_read_id;
}
#ifdef DEBUG
printf("SF: Got idcodes\n");
print_buffer(0, idcode, 1, sizeof(idcode), 0);
#endif
/* Validate ID's from flash dev table */
idp = idcode;
flash = spi_flash_validate_ids(spi, idp);
if (!flash)
goto err_read_id;
#ifdef CONFIG_SPI_FLASH_BAR
/* Configure the BAR - discover bank cmds and read current bank */
ret = spi_flash_bank_config(flash, *idp);
if (ret < 0)
goto err_read_id;
#endif
#ifdef CONFIG_OF_CONTROL
if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
debug("SF: FDT decode error\n");
goto err_read_id;
}
#endif
#ifndef CONFIG_SPL_BUILD
printf("SF: Detected %s with page size ", flash->name);
print_size(flash->sector_size, ", total ");
print_size(flash->size, "");
if (flash->memory_map)
printf(", mapped at %p", flash->memory_map);
puts("\n");
#endif
#ifndef CONFIG_SPI_FLASH_BAR
if (flash->size > SPI_FLASH_16MB_BOUN) {
puts("SF: Warning - Only lower 16MiB accessible,");
puts(" Full access #define CONFIG_SPI_FLASH_BAR\n");
}
#endif
/* Release spi bus */
spi_release_bus(spi);
return flash;
err_read_id:
spi_release_bus(spi);
err_claim_bus:
spi_free_slave(spi);
return NULL;
}
void spi_flash_free(struct spi_flash *flash)
{
spi_free_slave(flash->spi);
free(flash);
}
|
