env: Add support for UBI environment
UBI is a better place for the environment on NAND devices because it
handles wear-leveling and bad blocks.
Gluebi is needed in Linux to access the env as an MTD partition.
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/common/Makefile b/common/Makefile
index f631311..0e0fff1 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -66,6 +66,7 @@
COBJS-$(CONFIG_ENV_IS_IN_ONENAND) += env_onenand.o
COBJS-$(CONFIG_ENV_IS_IN_SPI_FLASH) += env_sf.o
COBJS-$(CONFIG_ENV_IS_IN_REMOTE) += env_remote.o
+COBJS-$(CONFIG_ENV_IS_IN_UBI) += env_ubi.o
COBJS-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o
# command
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index fab8694..afa128e 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -62,9 +62,10 @@
!defined(CONFIG_ENV_IS_IN_ONENAND) && \
!defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
!defined(CONFIG_ENV_IS_IN_REMOTE) && \
+ !defined(CONFIG_ENV_IS_IN_UBI) && \
!defined(CONFIG_ENV_IS_NOWHERE)
# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
-SPI_FLASH|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
+SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
#endif
/*
diff --git a/common/env_ubi.c b/common/env_ubi.c
new file mode 100644
index 0000000..0c592a6
--- /dev/null
+++ b/common/env_ubi.c
@@ -0,0 +1,103 @@
+/*
+ * (c) Copyright 2012 by National Instruments,
+ * Joe Hershberger <joe.hershberger@ni.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#include <command.h>
+#include <environment.h>
+#include <errno.h>
+#include <malloc.h>
+#include <search.h>
+#include <ubi_uboot.h>
+#undef crc32
+
+char *env_name_spec = "UBI";
+
+env_t *env_ptr;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int env_init(void)
+{
+ /* use default */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+
+ return 0;
+}
+
+#ifdef CONFIG_CMD_SAVEENV
+int saveenv(void)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
+ ssize_t len;
+ char *res;
+
+ res = (char *)&env_new->data;
+ len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
+ if (len < 0) {
+ error("Cannot export environment: errno = %d\n", errno);
+ return 1;
+ }
+
+ if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
+ printf("\n** Cannot find mtd partition \"%s\"\n",
+ CONFIG_ENV_UBI_PART);
+ return 1;
+ }
+
+ env_new->crc = crc32(0, env_new->data, ENV_SIZE);
+
+ if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new,
+ CONFIG_ENV_SIZE)) {
+ printf("\n** Unable to write env to %s:%s **\n",
+ CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
+ return 1;
+ }
+
+ puts("done\n");
+ return 0;
+}
+#endif /* CONFIG_CMD_SAVEENV */
+
+void env_relocate_spec(void)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
+
+ if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
+ printf("\n** Cannot find mtd partition \"%s\"\n",
+ CONFIG_ENV_UBI_PART);
+ set_default_env(NULL);
+ return;
+ }
+
+ if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)&buf,
+ CONFIG_ENV_SIZE)) {
+ printf("\n** Unable to read env from %s:%s **\n",
+ CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
+ set_default_env(NULL);
+ return;
+ }
+
+ env_import(buf, 1);
+}