130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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* (C) Copyright 2009 Texas Instruments, <www.ti.com>
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* Kishore Kadiyala <kishore.kadiyala@ti.com>
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* Moiz Sonasath <m-sonasath@ti.com>
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#if defined(CFG_ENV_IS_IN_EMMC) /* Environment is in EMMC */
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <mmc.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* References to names in env_common.c */
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extern uchar default_environment[];
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#ifdef ENV_IS_VARIABLE
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char *mmc_env_name_spec = "EMMC";
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/* update these elsewhere */
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extern env_t *env_ptr;
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#else /* !ENV_IS_VARIABLE */
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char *env_name_spec = "EMMC";
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#ifdef ENV_IS_EMBEDDED
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extern uchar environment[];
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env_t *env_ptr = (env_t *)(&environment[0]);
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#else /* ! ENV_IS_EMBEDDED */
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env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
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#endif /* ENV_IS_EMBEDDED */
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#endif /* ENV_IS_VARIABLE */
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#ifdef ENV_IS_VARIABLE
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uchar mmc_env_get_char_spec(int index)
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#else
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uchar env_get_char_spec(int index)
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#endif
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{
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return *((uchar *)(gd->env_addr + index));
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}
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#ifdef ENV_IS_VARIABLE
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void mmc_env_relocate_spec(void)
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#else
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void env_relocate_spec(void)
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#endif
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{
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unsigned int mmc_cont = 1;
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unsigned long env_addr;
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int use_default = 0;
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env_addr = CFG_ENV_ADDR;
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mmc_init(mmc_cont);
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mmc_read(mmc_cont, env_addr, (u_char *) env_ptr, CFG_ENV_SIZE);
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if (crc32(0, env_ptr->data, CFG_ENV_SIZE) != env_ptr->crc)
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use_default = 1;
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if (use_default) {
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memcpy(env_ptr->data, default_environment, CFG_ENV_SIZE);
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env_ptr->crc = crc32(0, env_ptr->data, CFG_ENV_SIZE);
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}
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}
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#ifdef ENV_IS_VARIABLE
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int mmc_saveenv(void)
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#else
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int saveenv(void)
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#endif
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{
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unsigned long env_addr = CFG_ENV_ADDR;
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int len;
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int mmc_cont = 1;
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len = CFG_ENV_SIZE;
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puts("Erasing MMC...");
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mmc_erase(mmc_cont, env_addr, len);
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printf("done\n");
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/* update crc */
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env_ptr->crc = crc32(0, env_ptr->data, len);
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puts("Writing to MMC... ");
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mmc_write(mmc_cont, (u_char *) env_ptr, env_addr, len);
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printf("done\n");
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gd->env_valid = 1;
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return 0;
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}
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#ifdef ENV_IS_VARIABLE
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int mmc_env_init(void)
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#else
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int env_init(void)
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#endif
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#endif /* CFG_ENV_IS_IN_EMMC */
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