diff options
Diffstat (limited to 'common/env_onenand.c')
| -rw-r--r-- | common/env_onenand.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/common/env_onenand.c b/common/env_onenand.c new file mode 100644 index 0000000..66107f9 --- /dev/null +++ b/common/env_onenand.c @@ -0,0 +1,134 @@ +/* + * (C) Copyright 2005-2007 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> + +#if defined(CFG_ENV_IS_IN_ONENAND) /* Environment is in OneNAND */ + +#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[]; + +#define ONENAND_ENV_SIZE(mtd) (mtd.oobblock - ENV_HEADER_SIZE) + +char *env_name_spec = "OneNAND"; + +#ifdef ENV_IS_EMBEDDED +extern uchar environment[]; +env_t *env_ptr = (env_t *) (&environment[0]); +#else /* ! ENV_IS_EMBEDDED */ +static unsigned char onenand_env[MAX_ONENAND_PAGESIZE]; +env_t *env_ptr = (env_t *) onenand_env; +#endif /* ENV_IS_EMBEDDED */ + +uchar env_get_char_spec(int index) +{ + DECLARE_GLOBAL_DATA_PTR; + + return (*((uchar *) (gd->env_addr + index))); +} + +void env_relocate_spec(void) +{ + DECLARE_GLOBAL_DATA_PTR; + unsigned long env_addr; + int use_default = 0; + int retlen; + + env_addr = CFG_ENV_ADDR; + env_addr -= (unsigned long)onenand_chip.base; + + /* Check OneNAND exist */ + if (onenand_mtd.oobblock) + /* Ignore read fail */ + onenand_read(&onenand_mtd, env_addr, onenand_mtd.oobblock, + &retlen, (u_char *) env_ptr); + else + onenand_mtd.oobblock = MAX_ONENAND_PAGESIZE; + + if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd)) != + env_ptr->crc) + use_default = 1; + + if (use_default) { + memcpy(env_ptr->data, default_environment, + ONENAND_ENV_SIZE(onenand_mtd)); + env_ptr->crc = + crc32(0, env_ptr->data, ONENAND_ENV_SIZE(onenand_mtd)); + } + + gd->env_addr = (ulong) & env_ptr->data; + gd->env_valid = 1; +} + +int saveenv(void) +{ + unsigned long env_addr = CFG_ENV_ADDR; + struct erase_info instr; + int retlen; + + instr.len = CFG_ENV_SIZE; + instr.addr = env_addr; + instr.addr -= (unsigned long)onenand_chip.base; + if (onenand_erase(&onenand_mtd, &instr)) { + printf("OneNAND: erase failed at 0x%08x\n", env_addr); + return 1; + } + + /* update crc */ + env_ptr->crc = + crc32(0, env_ptr->data, onenand_mtd.oobblock - ENV_HEADER_SIZE); + + env_addr -= (unsigned long)onenand_chip.base; + if (onenand_write(&onenand_mtd, env_addr, onenand_mtd.oobblock, &retlen, + (u_char *) env_ptr)) { + printf("OneNAND: write failed at 0x%08x\n", instr.addr); + return 2; + } + + return 0; +} + +int env_init(void) +{ + DECLARE_GLOBAL_DATA_PTR; + + /* use default */ + gd->env_addr = (ulong) & default_environment[0]; + gd->env_valid = 1; + + return 0; +} + +#endif /* CFG_ENV_IS_IN_ONENAND */ |