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authorMaximilian Schwerin <mvs@tigris.de>2012-03-12 23:57:50 +0000
committerWolfgang Denk <wd@denx.de>2012-03-30 22:38:14 +0200
commit57210c7cc363cf2a2a28010658c7ea67388f8d21 (patch)
tree51d157bd08d085834fc4f4d6c09ebf4c2c452946 /common
parent9b96c6b11fac3d7bcd5f9cb4d2868d06500e28db (diff)
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Add support for loading and saving the environment to a FAT partition
The following must be defined: CONFIG_ENV_IS_IN_FAT Enable this saving environment to FAT. FAT_ENV_INTERFACE Interface the FAT resides on (e.g. mmc). FAT_ENV_DEVICE The interface device number (e.g. 0 for mmc0) FAT_ENV_PART The device part (e.g. 1 for mmc0:1) FAT_ENV_FILE The filename of the environment file. Author: Maximilian Schwerin <mvs@tigris.de> Removed dead DEBUG comment. Signed-off-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'common')
-rw-r--r--common/Makefile1
-rw-r--r--common/cmd_nvedit.c3
-rw-r--r--common/env_fat.c156
3 files changed, 159 insertions, 1 deletions
diff --git a/common/Makefile b/common/Makefile
index ed2fb45..d9f10f3 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -54,6 +54,7 @@ COBJS-$(CONFIG_ENV_IS_IN_NVRAM) += env_embedded.o
COBJS-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o
COBJS-$(CONFIG_ENV_IS_IN_MG_DISK) += env_mgdisk.o
COBJS-$(CONFIG_ENV_IS_IN_MMC) += env_mmc.o
+COBJS-$(CONFIG_ENV_IS_IN_FAT) += env_fat.o
COBJS-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o
COBJS-$(CONFIG_ENV_IS_IN_NVRAM) += env_nvram.o
COBJS-$(CONFIG_ENV_IS_IN_ONENAND) += env_onenand.o
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 22f9821..b1494dc 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -61,13 +61,14 @@ DECLARE_GLOBAL_DATA_PTR;
!defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
!defined(CONFIG_ENV_IS_IN_MG_DISK) && \
!defined(CONFIG_ENV_IS_IN_MMC) && \
+ !defined(CONFIG_ENV_IS_IN_FAT) && \
!defined(CONFIG_ENV_IS_IN_NAND) && \
!defined(CONFIG_ENV_IS_IN_NVRAM) && \
!defined(CONFIG_ENV_IS_IN_ONENAND) && \
!defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
!defined(CONFIG_ENV_IS_NOWHERE)
# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
-SPI_FLASH|MG_DISK|NVRAM|MMC} or CONFIG_ENV_IS_NOWHERE
+SPI_FLASH|MG_DISK|NVRAM|MMC|FAT} or CONFIG_ENV_IS_NOWHERE
#endif
#define XMK_STR(x) #x
diff --git a/common/env_fat.c b/common/env_fat.c
new file mode 100644
index 0000000..bad92aa
--- /dev/null
+++ b/common/env_fat.c
@@ -0,0 +1,156 @@
+/*
+ * (c) Copyright 2011 by Tigris Elektronik GmbH
+ *
+ * Author:
+ * Maximilian Schwerin <mvs@tigris.de>
+ *
+ * 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 <linux/stddef.h>
+#include <malloc.h>
+#include <search.h>
+#include <errno.h>
+#include <fat.h>
+#include <mmc.h>
+
+char *env_name_spec = "FAT";
+
+env_t *env_ptr;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+uchar env_get_char_spec(int index)
+{
+ return *((uchar *)(gd->env_addr + index));
+}
+
+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)
+{
+ env_t env_new;
+ ssize_t len;
+ char *res;
+ block_dev_desc_t *dev_desc = NULL;
+ int dev = FAT_ENV_DEVICE;
+ int part = FAT_ENV_PART;
+
+ res = (char *)&env_new.data;
+ len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
+ if (len < 0) {
+ error("Cannot export environment: errno = %d\n", errno);
+ return 1;
+ }
+
+#ifdef CONFIG_MMC
+ if (strcmp (FAT_ENV_INTERFACE, "mmc") == 0) {
+ struct mmc *mmc = find_mmc_device(dev);
+
+ if (!mmc) {
+ printf("no mmc device at slot %x\n", dev);
+ return 1;
+ }
+
+ mmc->has_init = 0;
+ mmc_init(mmc);
+ }
+#endif /* CONFIG_MMC */
+
+ dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
+ if (dev_desc == NULL) {
+ printf("Failed to find %s%d\n",
+ FAT_ENV_INTERFACE, dev);
+ return 1;
+ }
+ if (fat_register_device(dev_desc, part) != 0) {
+ printf("Failed to register %s%d:%d\n",
+ FAT_ENV_INTERFACE, dev, part);
+ return 1;
+ }
+
+ env_new.crc = crc32(0, env_new.data, ENV_SIZE);
+ if (file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t)) == -1) {
+ printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
+ FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
+ return 1;
+ }
+
+ puts("done\n");
+ return 0;
+}
+#endif /* CONFIG_CMD_SAVEENV */
+
+void env_relocate_spec(void)
+{
+ char buf[CONFIG_ENV_SIZE];
+ block_dev_desc_t *dev_desc = NULL;
+ int dev = FAT_ENV_DEVICE;
+ int part = FAT_ENV_PART;
+
+#ifdef CONFIG_MMC
+ if (strcmp (FAT_ENV_INTERFACE, "mmc") == 0) {
+ struct mmc *mmc = find_mmc_device(dev);
+
+ if (!mmc) {
+ printf("no mmc device at slot %x\n", dev);
+ set_default_env(NULL);
+ return;
+ }
+
+ mmc->has_init = 0;
+ mmc_init(mmc);
+ }
+#endif /* CONFIG_MMC */
+
+ dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
+ if (dev_desc == NULL) {
+ printf("Failed to find %s%d\n",
+ FAT_ENV_INTERFACE, dev);
+ set_default_env(NULL);
+ return;
+ }
+ if (fat_register_device(dev_desc, part) != 0) {
+ printf("Failed to register %s%d:%d\n",
+ FAT_ENV_INTERFACE, dev, part);
+ set_default_env(NULL);
+ return;
+ }
+
+ if (file_fat_read(FAT_ENV_FILE, (unsigned char *)&buf, CONFIG_ENV_SIZE) == -1) {
+ printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
+ FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
+ set_default_env(NULL);
+ return;
+ }
+
+ env_import(buf, 1);
+}