/* * (C) Copyright 2005-2009 Samsung Electronics * Kyungmin Park <kyungmin.park@samsung.com> * * 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 */ #include <common.h> #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <malloc.h> #include <linux/mtd/compat.h> #include <linux/mtd/mtd.h> #include <linux/mtd/onenand.h> extern struct mtd_info onenand_mtd; extern struct onenand_chip onenand_chip; /* References to names in env_common.c */ extern uchar default_environment[]; char *env_name_spec = "OneNAND"; #define ONENAND_MAX_ENV_SIZE 4096 #define ONENAND_ENV_SIZE(mtd) (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE) #ifdef ENV_IS_EMBEDDED extern uchar environment[]; env_t *env_ptr = (env_t *) (&environment[0]); #else /* ! ENV_IS_EMBEDDED */ static unsigned char onenand_env[ONENAND_MAX_ENV_SIZE]; env_t *env_ptr = (env_t *) onenand_env; #endif /* ENV_IS_EMBEDDED */ DECLARE_GLOBAL_DATA_PTR; uchar env_get_char_spec(int index) { return (*((uchar *) (gd->env_addr + index))); } void env_relocate_spec(void) { struct mtd_info *mtd = &onenand_mtd; loff_t env_addr; int use_default = 0; size_t retlen; env_addr = CONFIG_ENV_ADDR; /* Check OneNAND exist */ if (mtd->writesize) /* Ignore read fail */ mtd->read(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen, (u_char *) env_ptr); else mtd->writesize = MAX_ONENAND_PAGESIZE; if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)) != env_ptr->crc) use_default = 1; if (use_default) { memcpy(env_ptr->data, default_environment, ONENAND_ENV_SIZE(mtd)); env_ptr->crc = crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)); } gd->env_addr = (ulong) & env_ptr->data; gd->env_valid = 1; } int saveenv(void) { struct mtd_info *mtd = &onenand_mtd; loff_t env_addr = CONFIG_ENV_ADDR; struct erase_info instr = { .callback = NULL, }; size_t retlen; instr.len = CONFIG_ENV_SIZE; instr.addr = env_addr; instr.mtd = mtd; if (mtd->erase(mtd, &instr)) { printf("OneNAND: erase failed at 0x%08llx\n", env_addr); return 1; } /* update crc */ env_ptr->crc = crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)); if (mtd->write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen, (u_char *) env_ptr)) { printf("OneNAND: write failed at 0x%llx\n", instr.addr); return 2; } return 0; } int env_init(void) { /* use default */ gd->env_addr = (ulong) & default_environment[0]; gd->env_valid = 1; return 0; }