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  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <environment.h>
  14 #include <linux/stddef.h>
  15 #include <malloc.h>
  16 #include <search.h>
  17 #include <errno.h>
  18 #include <onenand_uboot.h>
  19
  20 #include <linux/compat.h>
  21 #include <linux/mtd/mtd.h>
  22 #include <linux/mtd/onenand.h>
  23
  24 char *env_name_spec = "OneNAND";
  25
  26 #define ONENAND_MAX_ENV_SIZE    CONFIG_ENV_SIZE
  27 #define ONENAND_ENV_SIZE(mtd)   (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 void env_relocate_spec(void)
  32 {
  33         struct mtd_info *mtd = &onenand_mtd;
  34 #ifdef CONFIG_ENV_ADDR_FLEX
  35         struct onenand_chip *this = &onenand_chip;
  36 #endif
  37         int rc;
  38         size_t retlen;
  39 #ifdef ENV_IS_EMBEDDED
  40         char *buf = (char *)&environment;
  41 #else
  42         loff_t env_addr = CONFIG_ENV_ADDR;
  43         char onenand_env[ONENAND_MAX_ENV_SIZE];
  44         char *buf = (char *)&onenand_env[0];
  45 #endif /* ENV_IS_EMBEDDED */
  46
  47 #ifndef ENV_IS_EMBEDDED
  48 # ifdef CONFIG_ENV_ADDR_FLEX
  49         if (FLEXONENAND(this))
  50                 env_addr = CONFIG_ENV_ADDR_FLEX;
  51 # endif
  52         /* Check OneNAND exist */
  53         if (mtd->writesize)
  54                 /* Ignore read fail */
  55                 mtd_read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
  56                                 &retlen, (u_char *)buf);
  57         else
  58                 mtd->writesize = MAX_ONENAND_PAGESIZE;
  59 #endif /* !ENV_IS_EMBEDDED */
  60
  61         rc = env_import(buf, 1);
  62         if (rc)
  63                 gd->env_valid = 1;
  64 }
  65
  66 int saveenv(void)
  67 {
  68         env_t   env_new;
  69         ssize_t len;
  70         char    *res;
  71         struct mtd_info *mtd = &onenand_mtd;
  72 #ifdef CONFIG_ENV_ADDR_FLEX
  73         struct onenand_chip *this = &onenand_chip;
  74 #endif
  75         loff_t  env_addr = CONFIG_ENV_ADDR;
  76         size_t  retlen;
  77         struct erase_info instr = {
  78                 .callback       = NULL,
  79         };
  80
  81         res = (char *)&env_new.data;
  82         len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
  83         if (len < 0) {
  84                 error("Cannot export environment: errno = %d\n", errno);
  85                 return 1;
  86         }
  87         env_new.crc = crc32(0, env_new.data, ENV_SIZE);
  88
  89         instr.len = CONFIG_ENV_SIZE;
  90 #ifdef CONFIG_ENV_ADDR_FLEX
  91         if (FLEXONENAND(this)) {
  92                 env_addr = CONFIG_ENV_ADDR_FLEX;
  93                 instr.len = CONFIG_ENV_SIZE_FLEX;
  94                 instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
  95                                 1 : 0;
  96         }
  97 #endif
  98         instr.addr = env_addr;
  99         instr.mtd = mtd;
 100         if (mtd_erase(mtd, &instr)) {
 101                 printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
 102                 return 1;
 103         }
 104
 105         if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
 106                         (u_char *)&env_new)) {
 107                 printf("OneNAND: write failed at 0x%llx\n", instr.addr);
 108                 return 2;
 109         }
 110
 111         return 0;
 112 }
 113
 114 int env_init(void)
 115 {
 116         /* use default */
 117         gd->env_addr = (ulong)&default_environment[0];
 118         gd->env_valid = 1;
 119
 120         return 0;
 121 }