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 #define ONENAND_MAX_ENV_SIZE    CONFIG_ENV_SIZE
  25 #define ONENAND_ENV_SIZE(mtd)   (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 static int env_onenand_load(void)
  30 {
  31         struct mtd_info *mtd = &onenand_mtd;
  32 #ifdef CONFIG_ENV_ADDR_FLEX
  33         struct onenand_chip *this = &onenand_chip;
  34 #endif
  35         int rc;
  36         size_t retlen;
  37 #ifdef ENV_IS_EMBEDDED
  38         char *buf = (char *)&environment;
  39 #else
  40         loff_t env_addr = CONFIG_ENV_ADDR;
  41         char onenand_env[ONENAND_MAX_ENV_SIZE];
  42         char *buf = (char *)&onenand_env[0];
  43 #endif /* ENV_IS_EMBEDDED */
  44
  45 #ifndef ENV_IS_EMBEDDED
  46 # ifdef CONFIG_ENV_ADDR_FLEX
  47         if (FLEXONENAND(this))
  48                 env_addr = CONFIG_ENV_ADDR_FLEX;
  49 # endif
  50         /* Check OneNAND exist */
  51         if (mtd->writesize)
  52                 /* Ignore read fail */
  53                 mtd_read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
  54                                 &retlen, (u_char *)buf);
  55         else
  56                 mtd->writesize = MAX_ONENAND_PAGESIZE;
  57 #endif /* !ENV_IS_EMBEDDED */
  58
  59         rc = env_import(buf, 1);
  60         if (rc)
  61                 gd->env_valid = ENV_VALID;
  62
  63         return rc ? 0 : -EIO;
  64 }
  65
  66 static int env_onenand_save(void)
  67 {
  68         env_t   env_new;
  69         int ret;
  70         struct mtd_info *mtd = &onenand_mtd;
  71 #ifdef CONFIG_ENV_ADDR_FLEX
  72         struct onenand_chip *this = &onenand_chip;
  73 #endif
  74         loff_t  env_addr = CONFIG_ENV_ADDR;
  75         size_t  retlen;
  76         struct erase_info instr = {
  77                 .callback       = NULL,
  78         };
  79
  80         ret = env_export(&env_new);
  81         if (ret)
  82                 return ret;
  83
  84         instr.len = CONFIG_ENV_SIZE;
  85 #ifdef CONFIG_ENV_ADDR_FLEX
  86         if (FLEXONENAND(this)) {
  87                 env_addr = CONFIG_ENV_ADDR_FLEX;
  88                 instr.len = CONFIG_ENV_SIZE_FLEX;
  89                 instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
  90                                 1 : 0;
  91         }
  92 #endif
  93         instr.addr = env_addr;
  94         instr.mtd = mtd;
  95         if (mtd_erase(mtd, &instr)) {
  96                 printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
  97                 return 1;
  98         }
  99
 100         if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
 101                         (u_char *)&env_new)) {
 102                 printf("OneNAND: write failed at 0x%llx\n", instr.addr);
 103                 return 2;
 104         }
 105
 106         return 0;
 107 }
 108
 109 U_BOOT_ENV_LOCATION(onenand) = {
 110         .location       = ENVL_ONENAND,
 111         ENV_NAME("OneNAND")
 112         .load           = env_onenand_load,
 113         .save           = env_save_ptr(env_onenand_save),
 114 };