diff options
Diffstat (limited to 'roms/u-boot-sam460ex/common/env_onenand.c')
| -rw-r--r-- | roms/u-boot-sam460ex/common/env_onenand.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/roms/u-boot-sam460ex/common/env_onenand.c b/roms/u-boot-sam460ex/common/env_onenand.c new file mode 100644 index 000000000..cf997bf7e --- /dev/null +++ b/roms/u-boot-sam460ex/common/env_onenand.c @@ -0,0 +1,144 @@ +/* + * (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; +#ifdef CONFIG_ENV_ADDR_FLEX + struct onenand_chip *this = &onenand_chip; +#endif + loff_t env_addr; + int use_default = 0; + size_t retlen; + + env_addr = CONFIG_ENV_ADDR; +#ifdef CONFIG_ENV_ADDR_FLEX + if (FLEXONENAND(this)) + env_addr = CONFIG_ENV_ADDR_FLEX; +#endif + /* 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; +#ifdef CONFIG_ENV_ADDR_FLEX + struct onenand_chip *this = &onenand_chip; +#endif + loff_t env_addr = CONFIG_ENV_ADDR; + struct erase_info instr = { + .callback = NULL, + }; + size_t retlen; + + instr.len = CONFIG_ENV_SIZE; +#ifdef CONFIG_ENV_ADDR_FLEX + if (FLEXONENAND(this)) { + env_addr = CONFIG_ENV_ADDR_FLEX; + instr.len = CONFIG_ENV_SIZE_FLEX; + instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ? + 1 : 0; + } +#endif + 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; +} |