[U-Boot] [PATCH] Save environment data to mmc.
Terry Lv
r65388 at freescale.com
Wed Nov 4 10:51:55 CET 2009
This patch is to save environment data to mmc card.
Signed-off-by: Terry Lv <r65388 at freescale.com>
---
common/cmd_nvedit.c | 3 +-
common/env_mmc.c | 376 +++++++++++++++++++++++++++++++++++++++++++++++++
include/environment.h | 18 +++
3 files changed, 396 insertions(+), 1 deletions(-)
create mode 100644 common/env_mmc.c
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 9f8d531..9168241 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -60,9 +60,10 @@ DECLARE_GLOBAL_DATA_PTR;
!defined(CONFIG_ENV_IS_IN_NVRAM) && \
!defined(CONFIG_ENV_IS_IN_ONENAND) && \
!defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
+ !defined(CONFIG_ENV_IS_IN_MMC) && \
!defined(CONFIG_ENV_IS_NOWHERE)
# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
-SPI_FLASH|MG_DISK|NVRAM|NOWHERE}
+SPI_FLASH|MG_DISK|NVRAM|MMC|NOWHERE}
#endif
#define XMK_STR(x) #x
diff --git a/common/env_mmc.c b/common/env_mmc.c
new file mode 100644
index 0000000..a24d281
--- /dev/null
+++ b/common/env_mmc.c
@@ -0,0 +1,376 @@
+/*
+ * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
+
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel at sysgo.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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+
+#if defined(CONFIG_ENV_IS_IN_MMC) /* Environment is in MMC Flash */
+
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <mmc.h>
+
+#if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_MMC)
+#define CMD_SAVEENV
+#elif defined(CONFIG_ENV_OFFSET_REDUND)
+#error Cannot use CONFIG_ENV_OFFSET_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_MMC
+#endif
+
+#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
+#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
+#endif
+
+#ifdef CONFIG_INFERNO
+#error CONFIG_INFERNO not supported yet
+#endif
+
+/* references to names in env_common.c */
+extern uchar default_environment[];
+extern int default_environment_size;
+
+char *env_name_spec = "MMC";
+
+#ifdef ENV_IS_EMBEDDED
+extern uchar environment[];
+env_t *env_ptr = (env_t *)(&environment[0]);
+#else /* ! ENV_IS_EMBEDDED */
+env_t *env_ptr;
+#endif /* ENV_IS_EMBEDDED */
+
+/* local functions */
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default(void);
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+uchar env_get_char_spec(int index)
+{
+ return *((uchar *)(gd->env_addr + index));
+}
+
+
+/* this is called before nand_init()
+ * so we can't read Nand to validate env data.
+ * Mark it OK for now. env_relocate() in env_common.c
+ * will call our relocate function which will does
+ * the real validation.
+ *
+ * When using a NAND boot image (like sequoia_nand), the environment
+ * can be embedded or attached to the U-Boot image in NAND flash. This way
+ * the SPL loads not only the U-Boot image from NAND but also the
+ * environment.
+ */
+int env_init(void)
+{
+#if defined(CONFIG_IS_EMBEDDED)
+ size_t total;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1, *tmp_env2;
+
+ total = CONFIG_ENV_SIZE;
+
+ tmp_env1 = env_ptr;
+ tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
+
+ crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if (!crc1_ok && !crc2_ok)
+ gd->env_valid = 0;
+ else if (crc1_ok && !crc2_ok)
+ gd->env_valid = 1;
+ else if (!crc1_ok && crc2_ok)
+ gd->env_valid = 2;
+ else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ if (gd->env_valid == 1)
+ env_ptr = tmp_env1;
+ else if (gd->env_valid == 2)
+ env_ptr = tmp_env2;
+
+#else /* ENV_IS_EMBEDDED */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+
+#endif /* ENV_IS_EMBEDDED */
+
+ return 0;
+}
+
+#ifdef CMD_SAVEENV
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
+#ifdef CONFIG_ENV_OFFSET_REDUND
+int saveenv(void)
+{
+ size_t total;
+ uint blk_start = 0, blk_cnt = 0, n = 0;
+ struct mmc *mmc = find_mmc_device(0);
+
+ env_ptr->flags++;
+ total = CONFIG_ENV_SIZE;
+
+ if (!mmc) {
+ puts("No MMC card found\n");
+ return;
+ }
+
+ if (mmc_init(mmc)) {
+ puts("MMC init failed\n");
+ return 1;
+ }
+
+ if (gd->env_valid == 1) {
+ puts("Writing to redundant MMC... ");
+ blk_start = (CONFIG_ENV_OFFSET_REDUND % 512) ? \
+ ((CONFIG_ENV_OFFSET_REDUND / 512) + 1) : (CONFIG_ENV_OFFSET_REDUND / 512);
+ blk_cnt = (total % 512) ? ((total / 512) + 1) : (total / 512);
+ n = mmc->block_dev.block_write(0, blk_start , blk_cnt, (u_char *)env_ptr);
+ } else {
+ puts("Writing to MMC... ");
+ blk_start = (CONFIG_ENV_OFFSET % 512) ? \
+ ((CONFIG_ENV_OFFSET / 512) + 1) : (CONFIG_ENV_OFFSET / 512);
+ blk_cnt = (total % 512) ? ((total / 512) + 1) : (total / 512);
+ n = mmc->block_dev.block_write(0, blk_start , blk_cnt, (u_char *)env_ptr);
+ }
+ if ((n != blk_cnt) || (total != CONFIG_ENV_SIZE)) {
+ puts("failed\n");
+ return 1;
+ }
+
+ puts("done\n");
+ gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
+ return 0;
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
+int saveenv(void)
+{
+ size_t total;
+ uint blk_start = 0, blk_cnt = 0, n = 0;
+ struct mmc *mmc = find_mmc_device(0);
+
+ if (!mmc) {
+ puts("No MMC card found\n");
+ return;
+ }
+
+ if (mmc_init(mmc)) {
+ puts("MMC init failed\n");
+ return 1;
+ }
+
+ puts("Writing to MMC... ");
+ total = CONFIG_ENV_SIZE;
+ blk_start = (CONFIG_ENV_OFFSET % 512) ? \
+ ((CONFIG_ENV_OFFSET / 512) + 1) : (CONFIG_ENV_OFFSET / 512);
+ blk_cnt = (total % 512) ? ((total / 512) + 1) : (total / 512);
+ n = mmc->block_dev.block_write(0, blk_start , blk_cnt, (u_char *)env_ptr);
+ if ((n != blk_cnt) || (total != CONFIG_ENV_SIZE)) {
+ puts("failed\n");
+ return 1;
+ }
+
+ puts("done\n");
+ return 0;
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
+#endif /* CMD_SAVEENV */
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ size_t total;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1 = NULL, *tmp_env2 = NULL;
+ uint blk_start = 0, blk_cnt = 0, n = 0;
+ struct mmc *mmc = find_mmc_device(0);
+
+ if (!mmc) {
+ puts("No MMC card found\n");
+ return;
+ }
+
+ if (mmc_init(mmc)) {
+ puts("MMC init failed\n");
+ goto use_default;
+ }
+
+ total = CONFIG_ENV_SIZE;
+
+ tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ if (!tmp_env1) {
+ puts("Not enough memory!\n");
+ goto use_default;
+ }
+ memset(tmp_env1, 0, CONFIG_ENV_SIZE);
+
+ tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ if (!tmp_env2) {
+ puts("Not enough memory!\n");
+ goto use_default;
+ }
+ memset(tmp_env2, 0, CONFIG_ENV_SIZE);
+
+ puts("Loading environment from mmc... ");
+
+ blk_start = (CONFIG_ENV_OFFSET % 512) ? \
+ ((CONFIG_ENV_OFFSET / 512) + 1) : (CONFIG_ENV_OFFSET / 512);
+ blk_cnt = (total % 512) ? ((total / 512) + 1) : (total / 512);
+
+ n = mmc->block_dev.block_read(0, blk_start, blk_cnt, (uchar *)tmp_env1);
+
+ if (n != blk_cnt) {
+ puts("failed\n");
+ goto use_default;
+ }
+ puts("done\n");
+
+ puts("Loading redundant environment from mmc... ");
+
+ blk_start = (CONFIG_ENV_OFFSET_REDUND % 512) ? \
+ ((CONFIG_ENV_OFFSET_REDUND / 512) + 1) : (CONFIG_ENV_OFFSET_REDUND / 512);
+ blk_cnt = (total % 512) ? ((total / 512) + 1) : (total / 512);
+
+ n = mmc->block_dev.block_read(0, blk_start, blk_cnt, (uchar *)tmp_env2);
+
+ if (n != blk_cnt) {
+ puts("failed\n");
+ goto use_default;
+ }
+ puts("done\n");
+
+ crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if (!crc1_ok && !crc2_ok)
+ goto use_default;
+ else if (crc1_ok && !crc2_ok)
+ gd->env_valid = 1;
+ else if (!crc1_ok && crc2_ok)
+ gd->env_valid = 2;
+ else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ free(env_ptr);
+ if (gd->env_valid == 1) {
+ env_ptr = tmp_env1;
+ free(tmp_env2);
+ } else {
+ env_ptr = tmp_env2;
+ free(tmp_env1);
+ }
+
+ return;
+
+use_default:
+ if (tmp_env1)
+ free(tmp_env1);
+ if (tmp_env2)
+ free(tmp_env2);
+ return use_default();
+
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ size_t total;
+ uint blk_start = 0, blk_cnt = 0, n = 0;
+ struct mmc *mmc = find_mmc_device(0);
+
+ if (!mmc) {
+ puts("No MMC card found\n");
+ return;
+ }
+
+ if (mmc_init(mmc)) {
+ puts("MMC init failed\n");
+ return;
+ }
+
+ total = CONFIG_ENV_SIZE;
+
+ blk_start = (CONFIG_ENV_OFFSET % 512) ? \
+ ((CONFIG_ENV_OFFSET / 512) + 1) : (CONFIG_ENV_OFFSET / 512);
+ blk_cnt = (total % 512) ? ((total / 512) + 1) : (total / 512);
+
+ n = mmc->block_dev.block_read(0, blk_start, blk_cnt, (uchar *)env_ptr);
+
+ if ((n != blk_cnt) || (total != CONFIG_ENV_SIZE))
+ return use_default();
+
+ if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
+ return use_default();
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
+
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default()
+{
+ puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
+ set_default_env();
+}
+#endif
+
+#endif /* CONFIG_ENV_IS_IN_MMC */
diff --git a/include/environment.h b/include/environment.h
index b9924fd..0b72e0b 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -94,6 +94,24 @@
# endif
#endif /* CONFIG_ENV_IS_IN_MG_DISK */
+#if defined(CONFIG_ENV_IS_IN_MMC)
+# ifndef CONFIG_ENV_OFFSET
+# error "Need to define CONFIG_ENV_OFFSET when using CONFIG_ENV_IS_IN_MMC"
+# endif
+# ifndef CONFIG_ENV_ADDR
+# define CONFIG_ENV_ADDR (CONFIG_ENV_OFFSET)
+# endif
+# ifndef CONFIG_ENV_OFFSET
+# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR)
+# endif
+# ifdef CONFIG_ENV_OFFSET_REDUND
+# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+# endif
+# ifdef CONFIG_ENV_IS_EMBEDDED
+# define ENV_IS_EMBEDDED 1
+# endif
+#endif /* CONFIG_ENV_IS_IN_MMC */
+
/* Embedded env is only supported for some flash types */
#ifdef CONFIG_ENV_IS_EMBEDDED
# if !defined(CONFIG_ENV_IS_IN_FLASH) && \
--
1.6.0.4
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