2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Andreas Heppel <aheppel@sysgo.de>
8 * (C) Copyright 2008 Atmel Corporation
10 * See file CREDITS for list of people who contributed to this
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <environment.h>
31 #include <spi_flash.h>
33 #ifndef CONFIG_ENV_SPI_BUS
34 # define CONFIG_ENV_SPI_BUS 0
36 #ifndef CONFIG_ENV_SPI_CS
37 # define CONFIG_ENV_SPI_CS 0
39 #ifndef CONFIG_ENV_SPI_MAX_HZ
40 # define CONFIG_ENV_SPI_MAX_HZ 1000000
42 #ifndef CONFIG_ENV_SPI_MODE
43 # define CONFIG_ENV_SPI_MODE SPI_MODE_3
46 DECLARE_GLOBAL_DATA_PTR
;
48 /* references to names in env_common.c */
49 extern uchar default_environment
[];
50 extern int default_environment_size
;
52 char * env_name_spec
= "SPI Flash";
55 static struct spi_flash
*env_flash
;
57 uchar
env_get_char_spec(int index
)
59 return *((uchar
*)(gd
->env_addr
+ index
));
64 u32 saved_size
, saved_offset
;
65 char *saved_buffer
= NULL
;
70 puts("Environment SPI flash not initialized\n");
74 /* Is the sector larger than the env (i.e. embedded) */
75 if (CONFIG_ENV_SECT_SIZE
> CONFIG_ENV_SIZE
) {
76 saved_size
= CONFIG_ENV_SECT_SIZE
- CONFIG_ENV_SIZE
;
77 saved_offset
= CONFIG_ENV_OFFSET
+ CONFIG_ENV_SIZE
;
78 saved_buffer
= malloc(saved_size
);
83 ret
= spi_flash_read(env_flash
, saved_offset
, saved_size
, saved_buffer
);
88 if (CONFIG_ENV_SIZE
> CONFIG_ENV_SECT_SIZE
) {
89 sector
= CONFIG_ENV_SIZE
/ CONFIG_ENV_SECT_SIZE
;
90 if (CONFIG_ENV_SIZE
% CONFIG_ENV_SECT_SIZE
)
94 puts("Erasing SPI flash...");
95 ret
= spi_flash_erase(env_flash
, CONFIG_ENV_OFFSET
, sector
* CONFIG_ENV_SECT_SIZE
);
99 puts("Writing to SPI flash...");
100 ret
= spi_flash_write(env_flash
, CONFIG_ENV_OFFSET
, CONFIG_ENV_SIZE
, env_ptr
);
104 if (CONFIG_ENV_SECT_SIZE
> CONFIG_ENV_SIZE
) {
105 ret
= spi_flash_write(env_flash
, saved_offset
, saved_size
, saved_buffer
);
119 void env_relocate_spec(void)
123 env_flash
= spi_flash_probe(CONFIG_ENV_SPI_BUS
, CONFIG_ENV_SPI_CS
,
124 CONFIG_ENV_SPI_MAX_HZ
, CONFIG_ENV_SPI_MODE
);
128 ret
= spi_flash_read(env_flash
, CONFIG_ENV_OFFSET
, CONFIG_ENV_SIZE
, env_ptr
);
132 if (crc32(0, env_ptr
->data
, ENV_SIZE
) != env_ptr
->crc
)
140 spi_flash_free(env_flash
);
144 puts("*** Warning - bad CRC, using default environment\n\n");
146 if (default_environment_size
> CONFIG_ENV_SIZE
) {
148 puts("*** Error - default environment is too large\n\n");
152 memset(env_ptr
, 0, sizeof(env_t
));
153 memcpy(env_ptr
->data
, default_environment
, default_environment_size
);
154 env_ptr
->crc
= crc32(0, env_ptr
->data
, ENV_SIZE
);
160 /* SPI flash isn't usable before relocation */
161 gd
->env_addr
= (ulong
)&default_environment
[0];