blob: 1bbf93fdfa41903ce86b37ba6763b0c433c41db1 [file] [log] [blame]
Haavard Skinnemoen8c664972008-05-16 11:10:35 +02001/*
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Andreas Heppel <aheppel@sysgo.de>
7 *
8 * (C) Copyright 2008 Atmel Corporation
9 *
10 * See file CREDITS for list of people who contributed to this
11 * project.
12 *
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.
17 *
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.
22 *
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,
26 * MA 02111-1307 USA
27 */
28#include <common.h>
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020029#include <environment.h>
30#include <spi_flash.h>
31
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020032#ifndef CONFIG_ENV_SPI_BUS
33# define CONFIG_ENV_SPI_BUS 0
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020034#endif
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020035#ifndef CONFIG_ENV_SPI_CS
36# define CONFIG_ENV_SPI_CS 0
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020037#endif
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020038#ifndef CONFIG_ENV_SPI_MAX_HZ
39# define CONFIG_ENV_SPI_MAX_HZ 1000000
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020040#endif
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020041#ifndef CONFIG_ENV_SPI_MODE
42# define CONFIG_ENV_SPI_MODE SPI_MODE_3
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020043#endif
44
45DECLARE_GLOBAL_DATA_PTR;
46
47/* references to names in env_common.c */
48extern uchar default_environment[];
49extern int default_environment_size;
50
51char * env_name_spec = "SPI Flash";
52env_t *env_ptr;
53
54static struct spi_flash *env_flash;
55
56uchar env_get_char_spec(int index)
57{
58 return *((uchar *)(gd->env_addr + index));
59}
60
61int saveenv(void)
62{
TsiChung Liew07efc9e2008-08-06 19:37:17 -050063 u32 sector = 1;
64
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020065 if (!env_flash) {
66 puts("Environment SPI flash not initialized\n");
67 return 1;
68 }
69
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020070 if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
71 sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
72 if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
TsiChung Liew07efc9e2008-08-06 19:37:17 -050073 sector++;
74 }
75
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020076 puts("Erasing SPI flash...");
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020077 if (spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, sector * CONFIG_ENV_SECT_SIZE))
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020078 return 1;
79
80 puts("Writing to SPI flash...");
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020081 if (spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr))
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020082 return 1;
83
84 puts("done\n");
85 return 0;
86}
87
88void env_relocate_spec(void)
89{
90 int ret;
91
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020092 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
93 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020094 if (!env_flash)
95 goto err_probe;
96
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020097 ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr);
Haavard Skinnemoen8c664972008-05-16 11:10:35 +020098 if (ret)
99 goto err_read;
100
101 if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
102 goto err_crc;
103
104 gd->env_valid = 1;
105
106 return;
107
108err_read:
109 spi_flash_free(env_flash);
110 env_flash = NULL;
111err_probe:
112err_crc:
113 puts("*** Warning - bad CRC, using default environment\n\n");
114
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200115 if (default_environment_size > CONFIG_ENV_SIZE) {
Haavard Skinnemoen8c664972008-05-16 11:10:35 +0200116 gd->env_valid = 0;
117 puts("*** Error - default environment is too large\n\n");
118 return;
119 }
120
121 memset(env_ptr, 0, sizeof(env_t));
122 memcpy(env_ptr->data, default_environment, default_environment_size);
123 env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
124 gd->env_valid = 1;
125}
126
127int env_init(void)
128{
129 /* SPI flash isn't usable before relocation */
130 gd->env_addr = (ulong)&default_environment[0];
131 gd->env_valid = 1;
132
133 return 0;
134}