common/env_onenand.c

   1 /*
   2  * (C) Copyright 2010 DENX Software Engineering
   3  * Wolfgang Denk <wd@denx.de>
   4  *
   5  * (C) Copyright 2005-2009 Samsung Electronics
   6  * Kyungmin Park <kyungmin.park@samsung.com>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <environment.h>
  30 #include <linux/stddef.h>
  31 #include <malloc.h>
  32 #include <search.h>
  33 #include <errno.h>
  34 #include <onenand_uboot.h>
  35
  36 #include <linux/compat.h>
  37 #include <linux/mtd/mtd.h>
  38 #include <linux/mtd/onenand.h>
  39
  40 char *env_name_spec = "OneNAND";
  41
  42 #define ONENAND_MAX_ENV_SIZE    CONFIG_ENV_SIZE
  43 #define ONENAND_ENV_SIZE(mtd)   (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
  44
  45 DECLARE_GLOBAL_DATA_PTR;
  46
  47 void env_relocate_spec(void)
  48 {
  49         struct mtd_info *mtd = &onenand_mtd;
  50 #ifdef CONFIG_ENV_ADDR_FLEX
  51         struct onenand_chip *this = &onenand_chip;
  52 #endif
  53         int rc;
  54         size_t retlen;
  55 #ifdef ENV_IS_EMBEDDED
  56         char *buf = (char *)&environment;
  57 #else
  58         loff_t env_addr = CONFIG_ENV_ADDR;
  59         char onenand_env[ONENAND_MAX_ENV_SIZE];
  60         char *buf = (char *)&onenand_env[0];
  61 #endif /* ENV_IS_EMBEDDED */
  62
  63 #ifndef ENV_IS_EMBEDDED
  64 # ifdef CONFIG_ENV_ADDR_FLEX
  65         if (FLEXONENAND(this))
  66                 env_addr = CONFIG_ENV_ADDR_FLEX;
  67 # endif
  68         /* Check OneNAND exist */
  69         if (mtd->writesize)
  70                 /* Ignore read fail */
  71                 mtd->read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
  72                                 &retlen, (u_char *)buf);
  73         else
  74                 mtd->writesize = MAX_ONENAND_PAGESIZE;
  75 #endif /* !ENV_IS_EMBEDDED */
  76
  77         rc = env_import(buf, 1);
  78         if (rc)
  79                 gd->env_valid = 1;
  80 }
  81
  82 int saveenv(void)
  83 {
  84         env_t   env_new;
  85         ssize_t len;
  86         char    *res;
  87         struct mtd_info *mtd = &onenand_mtd;
  88 #ifdef CONFIG_ENV_ADDR_FLEX
  89         struct onenand_chip *this = &onenand_chip;
  90 #endif
  91         loff_t  env_addr = CONFIG_ENV_ADDR;
  92         size_t  retlen;
  93         struct erase_info instr = {
  94                 .callback       = NULL,
  95         };
  96
  97         res = (char *)&env_new.data;
  98         len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
  99         if (len < 0) {
 100                 error("Cannot export environment: errno = %d\n", errno);
 101                 return 1;
 102         }
 103         env_new.crc = crc32(0, env_new.data, ENV_SIZE);
 104
 105         instr.len = CONFIG_ENV_SIZE;
 106 #ifdef CONFIG_ENV_ADDR_FLEX
 107         if (FLEXONENAND(this)) {
 108                 env_addr = CONFIG_ENV_ADDR_FLEX;
 109                 instr.len = CONFIG_ENV_SIZE_FLEX;
 110                 instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
 111                                 1 : 0;
 112         }
 113 #endif
 114         instr.addr = env_addr;
 115         instr.mtd = mtd;
 116         if (mtd->erase(mtd, &instr)) {
 117                 printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
 118                 return 1;
 119         }
 120
 121         if (mtd->write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
 122                         (u_char *)&env_new)) {
 123                 printf("OneNAND: write failed at 0x%llx\n", instr.addr);
 124                 return 2;
 125         }
 126
 127         return 0;
 128 }
 129
 130 int env_init(void)
 131 {
 132         /* use default */
 133         gd->env_addr = (ulong)&default_environment[0];
 134         gd->env_valid = 1;
 135
 136         return 0;
 137 }