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;
62 uchar env_get_char_spec(int index)
64 return *((uchar *)(gd->env_addr + index));
67 #if defined(CONFIG_ENV_OFFSET_REDUND)
74 u32 saved_size, saved_offset;
75 char *saved_buffer = NULL;
78 char flag = OBSOLETE_FLAG;
81 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
83 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
85 set_default_env("!spi_flash_probe() failed");
90 res = (char *)&env_new.data;
91 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
93 error("Cannot export environment: errno = %d\n", errno);
96 env_new.crc = crc32(0, env_new.data, ENV_SIZE);
97 env_new.flags = ACTIVE_FLAG;
99 if (gd->env_valid == 1) {
100 env_new_offset = CONFIG_ENV_OFFSET_REDUND;
101 env_offset = CONFIG_ENV_OFFSET;
103 env_new_offset = CONFIG_ENV_OFFSET;
104 env_offset = CONFIG_ENV_OFFSET_REDUND;
107 /* Is the sector larger than the env (i.e. embedded) */
108 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
109 saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
110 saved_offset = env_new_offset + CONFIG_ENV_SIZE;
111 saved_buffer = malloc(saved_size);
116 ret = spi_flash_read(env_flash, saved_offset,
117 saved_size, saved_buffer);
122 if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
123 sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
124 if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
128 puts("Erasing SPI flash...");
129 ret = spi_flash_erase(env_flash, env_new_offset,
130 sector * CONFIG_ENV_SECT_SIZE);
134 puts("Writing to SPI flash...");
136 ret = spi_flash_write(env_flash, env_new_offset,
137 CONFIG_ENV_SIZE, &env_new);
141 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
142 ret = spi_flash_write(env_flash, saved_offset,
143 saved_size, saved_buffer);
148 ret = spi_flash_write(env_flash,
149 env_offset + offsetof(env_t, flags),
150 sizeof(env_new.flags), &flag);
156 gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
158 printf("Valid environment: %d\n", (int)gd->env_valid);
166 void env_relocate_spec(void)
169 int crc1_ok = 0, crc2_ok = 0;
170 env_t *tmp_env1 = NULL;
171 env_t *tmp_env2 = NULL;
174 tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
175 tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
177 if (!tmp_env1 || !tmp_env2) {
178 set_default_env("!malloc() failed");
182 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
183 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
185 set_default_env("!spi_flash_probe() failed");
189 ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
190 CONFIG_ENV_SIZE, tmp_env1);
192 set_default_env("!spi_flash_read() failed");
196 if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
199 ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
200 CONFIG_ENV_SIZE, tmp_env2);
202 if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
206 if (!crc1_ok && !crc2_ok) {
207 set_default_env("!bad CRC");
209 } else if (crc1_ok && !crc2_ok) {
211 } else if (!crc1_ok && crc2_ok) {
213 } else if (tmp_env1->flags == ACTIVE_FLAG &&
214 tmp_env2->flags == OBSOLETE_FLAG) {
216 } else if (tmp_env1->flags == OBSOLETE_FLAG &&
217 tmp_env2->flags == ACTIVE_FLAG) {
219 } else if (tmp_env1->flags == tmp_env2->flags) {
221 } else if (tmp_env1->flags == 0xFF) {
225 * this differs from code in env_flash.c, but I think a sane
226 * default path is desirable.
231 if (gd->env_valid == 1)
236 ret = env_import((char *)ep, 0);
238 error("Cannot import environment: errno = %d\n", errno);
239 set_default_env("env_import failed");
243 spi_flash_free(env_flash);
254 u32 saved_size, saved_offset;
255 char *saved_buffer = NULL;
263 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
265 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
267 set_default_env("!spi_flash_probe() failed");
272 /* Is the sector larger than the env (i.e. embedded) */
273 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
274 saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
275 saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
276 saved_buffer = malloc(saved_size);
280 ret = spi_flash_read(env_flash, saved_offset,
281 saved_size, saved_buffer);
286 if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
287 sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
288 if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
292 res = (char *)&env_new.data;
293 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
295 error("Cannot export environment: errno = %d\n", errno);
298 env_new.crc = crc32(0, env_new.data, ENV_SIZE);
300 puts("Erasing SPI flash...");
301 ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
302 sector * CONFIG_ENV_SECT_SIZE);
306 puts("Writing to SPI flash...");
307 ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
308 CONFIG_ENV_SIZE, &env_new);
312 if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
313 ret = spi_flash_write(env_flash, saved_offset,
314 saved_size, saved_buffer);
328 void env_relocate_spec(void)
330 char buf[CONFIG_ENV_SIZE];
333 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
334 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
336 set_default_env("!spi_flash_probe() failed");
340 ret = spi_flash_read(env_flash,
341 CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
343 set_default_env("!spi_flash_read() failed");
347 ret = env_import(buf, 1);
352 spi_flash_free(env_flash);
359 /* SPI flash isn't usable before relocation */
360 gd->env_addr = (ulong)&default_environment[0];