mirror of
https://github.com/AsahiLinux/u-boot
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134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
/*
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* (C) Copyright 2005-2007 Samsung Electronics
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* Kyungmin Park <kyungmin.park@samsung.com>
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*
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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_ONENAND) /* Environment is in OneNAND */
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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 <linux/mtd/compat.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/onenand.h>
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extern struct mtd_info onenand_mtd;
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extern struct onenand_chip onenand_chip;
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/* References to names in env_common.c */
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extern uchar default_environment[];
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#define ONENAND_ENV_SIZE(mtd) (mtd.oobblock - ENV_HEADER_SIZE)
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char *env_name_spec = "OneNAND";
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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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static unsigned char onenand_env[MAX_ONENAND_PAGESIZE];
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env_t *env_ptr = (env_t *) onenand_env;
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#endif /* ENV_IS_EMBEDDED */
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uchar env_get_char_spec(int index)
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{
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DECLARE_GLOBAL_DATA_PTR;
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return (*((uchar *) (gd->env_addr + index)));
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}
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void env_relocate_spec(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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unsigned long env_addr;
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int use_default = 0;
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size_t retlen;
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env_addr = CFG_ENV_ADDR;
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env_addr -= (unsigned long)onenand_chip.base;
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/* Check OneNAND exist */
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if (onenand_mtd.oobblock)
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/* Ignore read fail */
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onenand_read(&onenand_mtd, env_addr, onenand_mtd.oobblock,
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&retlen, (u_char *) env_ptr);
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else
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onenand_mtd.oobblock = MAX_ONENAND_PAGESIZE;
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if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd)) !=
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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,
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ONENAND_ENV_SIZE(onenand_mtd));
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env_ptr->crc =
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crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd));
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}
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gd->env_addr = (ulong) & env_ptr->data;
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gd->env_valid = 1;
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}
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int saveenv(void)
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{
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unsigned long env_addr = CFG_ENV_ADDR;
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struct erase_info instr;
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size_t retlen;
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instr.len = CFG_ENV_SIZE;
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instr.addr = env_addr;
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instr.addr -= (unsigned long)onenand_chip.base;
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if (onenand_erase(&onenand_mtd, &instr)) {
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printf("OneNAND: erase failed at 0x%08x\n", env_addr);
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return 1;
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}
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/* update crc */
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env_ptr->crc =
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crc32(0, env_ptr->data, onenand_mtd.oobblock - ENV_HEADER_SIZE);
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env_addr -= (unsigned long)onenand_chip.base;
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if (onenand_write(&onenand_mtd, env_addr, onenand_mtd.oobblock, &retlen,
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(u_char *) env_ptr)) {
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printf("OneNAND: write failed at 0x%08x\n", instr.addr);
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return 2;
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}
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return 0;
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}
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int env_init(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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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_ONENAND */
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