When after booting from SDcard, the environment variables can to be saved on it, this patch add the operation support.
Signed-off-by: Jason Jin Jason.jin@freescale.com Signed-off-by: Mingkai Hu Mingkai.hu@freescale.com --- common/Makefile | 1 + common/cmd_nvedit.c | 3 +- common/env_common.c | 3 +- common/env_sdcard.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 134 insertions(+), 2 deletions(-) create mode 100644 common/env_sdcard.c
diff --git a/common/Makefile b/common/Makefile index f13cd11..c768344 100644 --- a/common/Makefile +++ b/common/Makefile @@ -57,6 +57,7 @@ COBJS-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o COBJS-$(CONFIG_ENV_IS_IN_NVRAM) += env_nvram.o COBJS-$(CONFIG_ENV_IS_IN_ONENAND) += env_onenand.o COBJS-$(CONFIG_ENV_IS_IN_SPI_FLASH) += env_sf.o +COBJS-$(CONFIG_ENV_IS_IN_SDCARD) += env_sdcard.o COBJS-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o
# command diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c index 68c673e..fb6ba8d 100644 --- a/common/cmd_nvedit.c +++ b/common/cmd_nvedit.c @@ -59,8 +59,9 @@ DECLARE_GLOBAL_DATA_PTR; !defined(CONFIG_ENV_IS_IN_NAND) && \ !defined(CONFIG_ENV_IS_IN_ONENAND) && \ !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \ + !defined(CONFIG_ENV_IS_IN_SDCARD) && \ !defined(CONFIG_ENV_IS_NOWHERE) -# error Define one of CONFIG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|ONENAND|SPI_FLASH|NOWHERE} +# error Define one of CONFIG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|ONENAND|SPI_FLASH|SDCARD|NOWHERE} #endif
#define XMK_STR(x) #x diff --git a/common/env_common.c b/common/env_common.c index 6be3bb0..f1aaed2 100644 --- a/common/env_common.c +++ b/common/env_common.c @@ -140,7 +140,8 @@ uchar default_environment[] = { };
#if defined(CONFIG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */ \ - || defined(CONFIG_ENV_IS_IN_SPI_FLASH) + || defined(CONFIG_ENV_IS_IN_SPI_FLASH) \ + || defined(CONFIG_ENV_IS_IN_SDCARD) int default_environment_size = sizeof(default_environment); #endif
diff --git a/common/env_sdcard.c b/common/env_sdcard.c new file mode 100644 index 0000000..1afcbbb --- /dev/null +++ b/common/env_sdcard.c @@ -0,0 +1,129 @@ + /* + * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved. + * Author: Jason.jin jason.jin@freescale.com + * + * Changelog: + * July 2008, Intial version. + * March 2009, Use the MMC framework's read/write function. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This file is only used for booting from SD card, During the + * booting up process, the environments was reading into memory + * together with the u-boot images. The environments locate + * from the last 8K of the 512k special version u-boot image. + * + * 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 <mmc.h> + +#ifdef CONFIG_ENV_IS_IN_SDCARD + +#include <environment.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define SD_BLK_SIZE 512 + +/* references to names in env_common.c */ +extern uchar default_environment[]; +extern int default_environment_size; + +char *env_name_spec = "SD CARD"; +env_t *env_ptr; + +uchar env_get_char_spec(int index) +{ + return *((uchar *)(gd->env_addr + index)); +} + +int saveenv(void) +{ + int env_blknr, env_blkcnt; + int code_offset, code_len, env_addr; + uchar tmp_buf[512]; + int n, tmp_crc; + struct mmc *mmc = find_mmc_device(0); + + mmc_init(mmc); + + /* read out the first block, get the config data information */ + env_blknr = 0; + env_blkcnt = 1; + n = mmc->block_dev.block_read(0, env_blknr, env_blkcnt, tmp_buf); + if (n != env_blkcnt) + return 1; + + /* Get the Source Address, from offset 0x50 */ + code_offset = *(unsigned long *)(tmp_buf + 0x50); + + /* Get the code size from offset 0x48, the size incude the env size 8K */ + code_len = *(unsigned long *)(tmp_buf + 0x48); + env_addr = code_offset + code_len - CONFIG_ENV_SIZE; + + env_blknr = env_addr / SD_BLK_SIZE; + env_blkcnt = CONFIG_ENV_SIZE / SD_BLK_SIZE; + + n = mmc->block_dev.block_write(0, env_blknr, env_blkcnt, env_ptr); + if (n != env_blkcnt) + return 1; + + puts("done\n"); + return 0; +} + +void env_relocate_spec(void) +{ + /*Just copy to relocate place*/ + memcpy((u8 *)env_ptr, (u8 *)CONFIG_ENV_ADDR_IN_RAM, CONFIG_ENV_SIZE); + + if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) { + puts("*** Warning - bad CRC, using default environment\n\n"); + + if (default_environment_size > CONFIG_ENV_SIZE) { + gd->env_valid = 0; + puts("*** Error - default environment is too large\n\n"); + return; + } + + memset(env_ptr, 0, sizeof(env_t)); + memcpy(env_ptr->data, default_environment, default_environment_size); + env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); + } + gd->env_valid = 1; +} + +int env_init(void) +{ + /* The ROM code has copied the u-boot and the env to RAM + * But we need to know if there're env settings there by crc check + */ + + env_t *env_ptr_tmp = (env_t *)CONFIG_ENV_ADDR_IN_RAM; + if (crc32(0, env_ptr_tmp->data, ENV_SIZE) == env_ptr_tmp->crc) { + gd->env_addr = (ulong)&(env_ptr_tmp->data); + gd->env_valid = 1; + return 0; + } + + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 0; + return 0; +} + +#endif /* CONFIG_ENV_IS_IN_SDCARD */