2 * (C) Copyright 2000-2010
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>
35 #ifndef CONFIG_ENV_SPI_BUS
36 # define CONFIG_ENV_SPI_BUS 0
38 #ifndef CONFIG_ENV_SPI_CS
39 # define CONFIG_ENV_SPI_CS 0
41 #ifndef CONFIG_ENV_SPI_MAX_HZ
42 # define CONFIG_ENV_SPI_MAX_HZ 1000000
44 #ifndef CONFIG_ENV_SPI_MODE
45 # define CONFIG_ENV_SPI_MODE SPI_MODE_3
48 #ifdef CONFIG_ENV_OFFSET_REDUND
49 static ulong env_offset = CONFIG_ENV_OFFSET;
50 static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
53 #define OBSOLETE_FLAG 0
54 #endif /* CONFIG_ENV_OFFSET_REDUND */
56 DECLARE_GLOBAL_DATA_PTR;
58 char *env_name_spec = "SPI Flash";
60 static struct spi_flash *env_flash;
61 static char env_buf[CONFIG_ENV_SIZE];
63 #if defined(CONFIG_ENV_OFFSET_REDUND)
66 env_t *env_new = (env_t *)env_buf;
68 char *res, *saved_buffer = NULL, flag = OBSOLETE_FLAG;
69 u32 saved_size, saved_offset, sector = 1;
73 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
75 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
77 set_default_env("!spi_flash_probe() failed");
82 res = (char *)env_new->data;
83 len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
85 error("Cannot export environment: errno = %d\n", errno);
88 env_new->crc = crc32(0, env_new->data, ENV_SIZE);
89 env_new->flags = ACTIVE_FLAG;
91 if (gd->env_valid == 1) {
92 env_new_offset = CONFIG_ENV_OFFSET_REDUND;
93 env_offset = CONFIG_ENV_OFFSET;
95 env_new_offset = CONFIG_ENV_OFFSET;
96 env_offset = CONFIG_ENV_OFFSET_REDUND;
99 /* Is the sector larger than the env (i.e. embedded) */
100 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
101 saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
102 saved_offset = env_new_offset + CONFIG_ENV_SIZE;
103 saved_buffer = malloc(saved_size);
108 ret = spi_flash_read(env_flash, saved_offset,
109 saved_size, saved_buffer);
114 if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
115 sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
116 if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
120 puts("Erasing SPI flash...");
121 ret = spi_flash_erase(env_flash, env_new_offset,
122 sector * CONFIG_ENV_SECT_SIZE);
126 puts("Writing to SPI flash...");
128 ret = spi_flash_write(env_flash, env_new_offset,
129 CONFIG_ENV_SIZE, env_new);
133 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
134 ret = spi_flash_write(env_flash, saved_offset,
135 saved_size, saved_buffer);
140 ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
141 sizeof(env_new->flags), &flag);
147 gd->env_valid = gd->env_valid == 2 ? 1 : 2;
149 printf("Valid environment: %d\n", (int)gd->env_valid);
158 void env_relocate_spec(void)
161 int crc1_ok = 0, crc2_ok = 0;
162 env_t *tmp_env1 = NULL;
163 env_t *tmp_env2 = NULL;
166 tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
167 tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
169 if (!tmp_env1 || !tmp_env2) {
170 set_default_env("!malloc() failed");
174 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
175 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
177 set_default_env("!spi_flash_probe() failed");
181 ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
182 CONFIG_ENV_SIZE, tmp_env1);
184 set_default_env("!spi_flash_read() failed");
188 if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
191 ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
192 CONFIG_ENV_SIZE, tmp_env2);
194 if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
198 if (!crc1_ok && !crc2_ok) {
199 set_default_env("!bad CRC");
201 } else if (crc1_ok && !crc2_ok) {
203 } else if (!crc1_ok && crc2_ok) {
205 } else if (tmp_env1->flags == ACTIVE_FLAG &&
206 tmp_env2->flags == OBSOLETE_FLAG) {
208 } else if (tmp_env1->flags == OBSOLETE_FLAG &&
209 tmp_env2->flags == ACTIVE_FLAG) {
211 } else if (tmp_env1->flags == tmp_env2->flags) {
213 } else if (tmp_env1->flags == 0xFF) {
217 * this differs from code in env_flash.c, but I think a sane
218 * default path is desirable.
223 if (gd->env_valid == 1)
228 ret = env_import((char *)ep, 0);
230 error("Cannot import environment: errno = %d\n", errno);
231 set_default_env("env_import failed");
235 spi_flash_free(env_flash);
244 u32 saved_size, saved_offset, sector = 1;
245 char *res, *saved_buffer = NULL;
247 env_t *env_new = (env_t *)env_buf;
251 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
253 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
255 set_default_env("!spi_flash_probe() failed");
260 /* Is the sector larger than the env (i.e. embedded) */
261 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
262 saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
263 saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
264 saved_buffer = malloc(saved_size);
268 ret = spi_flash_read(env_flash, saved_offset,
269 saved_size, saved_buffer);
274 if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
275 sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
276 if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
280 res = (char *)env_new->data;
281 len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
283 error("Cannot export environment: errno = %d\n", errno);
286 env_new->crc = crc32(0, env_new->data, ENV_SIZE);
288 puts("Erasing SPI flash...");
289 ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
290 sector * CONFIG_ENV_SECT_SIZE);
294 puts("Writing to SPI flash...");
295 ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
296 CONFIG_ENV_SIZE, env_new);
300 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
301 ret = spi_flash_write(env_flash, saved_offset,
302 saved_size, saved_buffer);
317 void env_relocate_spec(void)
322 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
323 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
325 set_default_env("!spi_flash_probe() failed");
329 ret = spi_flash_read(env_flash,
330 CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
332 set_default_env("!spi_flash_read() failed");
336 ret = env_import(buf, 1);
340 spi_flash_free(env_flash);
347 /* SPI flash isn't usable before relocation */
348 gd->env_addr = (ulong)&default_environment[0];