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
|
/*
* This file is part of the flashrom project.
*
* Copyright (C) 2007, 2008, 2009, 2010, 2011 Carl-Daniel Hailfinger
* Copyright (C) 2008 coresystems GmbH
*
* 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; version 2 of the License.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Contains the generic SPI framework
*/
#include <strings.h>
#include <string.h>
#include "flash.h"
#include "flashchips.h"
#include "chipdrivers.h"
#include "programmer.h"
#include "spi.h"
int spi_send_command(struct flashctx *flash, unsigned int writecnt,
unsigned int readcnt, const unsigned char *writearr,
unsigned char *readarr)
{
return flash->pgm->spi.command(flash, writecnt, readcnt, writearr,
readarr);
}
int spi_send_multicommand(struct flashctx *flash, struct spi_command *cmds)
{
return flash->pgm->spi.multicommand(flash, cmds);
}
int default_spi_send_command(struct flashctx *flash, unsigned int writecnt,
unsigned int readcnt,
const unsigned char *writearr,
unsigned char *readarr)
{
struct spi_command cmd[] = {
{
.writecnt = writecnt,
.readcnt = readcnt,
.writearr = writearr,
.readarr = readarr,
}, {
.writecnt = 0,
.writearr = NULL,
.readcnt = 0,
.readarr = NULL,
}};
return spi_send_multicommand(flash, cmd);
}
int default_spi_send_multicommand(struct flashctx *flash,
struct spi_command *cmds)
{
int result = 0;
for (; (cmds->writecnt || cmds->readcnt) && !result; cmds++) {
result = spi_send_command(flash, cmds->writecnt, cmds->readcnt,
cmds->writearr, cmds->readarr);
}
return result;
}
int default_spi_read(struct flashctx *flash, uint8_t *buf, unsigned int start,
unsigned int len)
{
unsigned int max_data = flash->pgm->spi.max_data_read;
if (max_data == MAX_DATA_UNSPECIFIED) {
msg_perr("%s called, but SPI read chunk size not defined "
"on this hardware. Please report a bug at "
"flashrom@flashrom.org\n", __func__);
return 1;
}
return spi_read_chunked(flash, buf, start, len, max_data);
}
int default_spi_write_256(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
unsigned int max_data = flash->pgm->spi.max_data_write;
if (max_data == MAX_DATA_UNSPECIFIED) {
msg_perr("%s called, but SPI write chunk size not defined "
"on this hardware. Please report a bug at "
"flashrom@flashrom.org\n", __func__);
return 1;
}
return spi_write_chunked(flash, buf, start, len, max_data);
}
int spi_chip_read(struct flashctx *flash, uint8_t *buf, unsigned int start,
unsigned int len)
{
unsigned int addrbase = 0;
/* Check if the chip fits between lowest valid and highest possible
* address. Highest possible address with the current SPI implementation
* means 0xffffff, the highest unsigned 24bit number.
*/
addrbase = spi_get_valid_read_addr(flash);
if (addrbase + flash->chip->total_size * 1024 > (1 << 24)) {
msg_perr("Flash chip size exceeds the allowed access window. ");
msg_perr("Read will probably fail.\n");
/* Try to get the best alignment subject to constraints. */
addrbase = (1 << 24) - flash->chip->total_size * 1024;
}
/* Check if alignment is native (at least the largest power of two which
* is a factor of the mapped size of the chip).
*/
if (ffs(flash->chip->total_size * 1024) > (ffs(addrbase) ? : 33)) {
msg_perr("Flash chip is not aligned natively in the allowed "
"access window.\n");
msg_perr("Read will probably return garbage.\n");
}
return flash->pgm->spi.read(flash, buf, addrbase + start, len);
}
/*
* Program chip using page (256 bytes) programming.
* Some SPI masters can't do this, they use single byte programming instead.
* The redirect to single byte programming is achieved by setting
* .write_256 = spi_chip_write_1
*/
/* real chunksize is up to 256, logical chunksize is 256 */
int spi_chip_write_256(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
return flash->pgm->spi.write_256(flash, buf, start, len);
}
/*
* Get the lowest allowed address for read accesses. This often happens to
* be the lowest allowed address for all commands which take an address.
* This is a programmer limitation.
*/
uint32_t spi_get_valid_read_addr(struct flashctx *flash)
{
switch (flash->pgm->spi.type) {
#if CONFIG_INTERNAL == 1
#if defined(__i386__) || defined(__x86_64__)
case SPI_CONTROLLER_ICH7:
case SPI_CONTROLLER_ICH9:
/* Return BBAR for ICH chipsets. */
return ichspi_bbar;
#endif
#endif
default:
return 0;
}
}
int spi_aai_write(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
return flash->pgm->spi.write_aai(flash, buf, start, len);
}
int register_spi_programmer(const struct spi_programmer *pgm)
{
struct registered_programmer rpgm;
if (!pgm->write_aai || !pgm->write_256 || !pgm->read || !pgm->command ||
!pgm->multicommand ||
((pgm->command == default_spi_send_command) &&
(pgm->multicommand == default_spi_send_multicommand))) {
msg_perr("%s called with incomplete programmer definition. "
"Please report a bug at flashrom@flashrom.org\n",
__func__);
return ERROR_FLASHROM_BUG;
}
rpgm.buses_supported = BUS_SPI;
rpgm.spi = *pgm;
return register_programmer(&rpgm);
}
|
