This patch is to save environment data to mmc card. It uses interfaces defined
in generic MMC framework. This is enabled with CONFIG_ENV_IS_IN_MMC option.
Based on the earlier patch from Terry Lv at Freescale
Signed-off-by: Alagu Sankar <alagusan...@embwise.com>
---
arch/arm/lib/board.c | 10 ++--
arch/powerpc/lib/board.c | 12 ++--
common/Makefile | 1 +
common/cmd_nvedit.c | 3 +-
common/env_mmc.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++
include/environment.h | 18 +++++
6 files changed, 200 insertions(+), 12 deletions(-)
create mode 100644 common/env_mmc.c
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index f5660a9..5e7558e 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -338,6 +338,11 @@ void start_armboot (void)
nand_init(); /* go init the NAND */
#endif
+#ifdef CONFIG_GENERIC_MMC
+ puts ("MMC: ");
+ mmc_initialize (gd->bd);
+#endif
+
#if defined(CONFIG_CMD_ONENAND)
onenand_init();
#endif
@@ -419,11 +424,6 @@ extern void davinci_eth_set_mac_addr (const u_int8_t
*addr);
board_late_init ();
#endif
-#ifdef CONFIG_GENERIC_MMC
- puts ("MMC: ");
- mmc_initialize (gd->bd);
-#endif
-
#ifdef CONFIG_BITBANGMII
bb_miiphy_init();
#endif
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index 7b09fb5..1008635 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -783,6 +783,12 @@ void board_init_r (gd_t *id, ulong dest_addr)
nand_init(); /* go init the NAND */
#endif
+#ifdef CONFIG_GENERIC_MMC
+ WATCHDOG_RESET ();
+ puts ("MMC: ");
+ mmc_initialize (bd);
+#endif
+
/* relocate environment function pointers etc. */
env_relocate ();
@@ -939,12 +945,6 @@ void board_init_r (gd_t *id, ulong dest_addr)
scsi_init ();
#endif
-#ifdef CONFIG_GENERIC_MMC
- WATCHDOG_RESET ();
- puts ("MMC: ");
- mmc_initialize (bd);
-#endif
-
#if defined(CONFIG_CMD_DOC)
WATCHDOG_RESET ();
puts ("DOC: ");
diff --git a/common/Makefile b/common/Makefile
index dbf7a05..2c37073 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -58,6 +58,7 @@ COBJS-$(CONFIG_ENV_IS_IN_FLASH) += env_embedded.o
COBJS-$(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_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 eb89e9e..27e46f7 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -63,9 +63,10 @@ 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..ef7e5fb
--- /dev/null
+++ b/common/env_mmc.c
@@ -0,0 +1,168 @@
+/*
+ * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, w...@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <ahep...@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>
+
+#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
+
+/* references to names in env_common.c */
+extern uchar default_environment[];
+
+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));
+}
+
+int env_init(void)
+{
+ /* use default */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+
+ return 0;
+}
+
+inline int init_mmc_for_env(struct mmc *mmc)
+{
+ if (!mmc) {
+ puts("No MMC card found\n");
+ return -1;
+ }
+
+ if (mmc_init(mmc)) {
+ puts("MMC init failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+#ifdef CMD_SAVEENV
+
+inline int write_env(struct mmc *mmc, unsigned long size,
+ unsigned long offset, const void *buffer)
+{
+ uint blk_start = 0, blk_cnt = 0, n = 0;
+
+ blk_start = (offset % 512) ? ((offset / 512) + 1) : (offset / 512);
+ blk_cnt = (size % 512) ? ((size / 512) + 1) : (size / 512);
+ n = mmc->block_dev.block_write(0, blk_start , blk_cnt,
+ (u_char *)buffer);
+
+ return (n == blk_cnt) ? 0 : -1;
+}
+
+int saveenv(void)
+{
+ struct mmc *mmc = find_mmc_device(0);
+
+ if (init_mmc_for_env(mmc))
+ return 1;
+
+ puts("Writing to MMC... ");
+ if (write_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, env_ptr)) {
+ puts("failed\n");
+ return 1;
+ }
+
+ puts("done\n");
+ return 0;
+}
+#endif /* CMD_SAVEENV */
+
+inline int read_env(struct mmc *mmc, unsigned long size,
+ unsigned long offset, const void *buffer)
+{
+ uint blk_start = 0, blk_cnt = 0, n = 0;
+
+ blk_start = (offset % 512) ? ((offset / 512) + 1) : (offset / 512);
+ blk_cnt = (size % 512) ? ((size / 512) + 1) : (size / 512);
+
+ n = mmc->block_dev.block_read(0, blk_start, blk_cnt, (uchar *)buffer);
+
+ return (n == blk_cnt) ? 0 : -1;
+}
+
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ struct mmc *mmc = find_mmc_device(0);
+
+ if (init_mmc_for_env(mmc))
+ return;
+
+ if (read_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, env_ptr))
+ return use_default();
+
+ if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
+ return use_default();
+
+#endif /* ! ENV_IS_EMBEDDED */
+}
+
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default()
+{
+ puts ("*** Warning - bad CRC or MMC, using default environment\n\n");
+ set_default_env();
+}
+#endif
+
diff --git a/include/environment.h b/include/environment.h
index b9924fd..aa0e750 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) && \
--
1.6.0.6
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
