env/onenand.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2010 DENX Software Engineering
   4  * Wolfgang Denk <[email protected]>
   5  *
   6  * (C) Copyright 2005-2009 Samsung Electronics
   7  * Kyungmin Park <[email protected]>
   8  */
   9
  10 #include <command.h>
  11 #include <env_internal.h>
  12 #include <asm/global_data.h>
  13 #include <linux/stddef.h>
  14 #include <malloc.h>
  15 #include <search.h>
  16 #include <errno.h>
  17 #include <onenand_uboot.h>
  18
  19 #include <linux/compat.h>
  20 #include <linux/mtd/mtd.h>
  21 #include <linux/mtd/onenand.h>
  22
  23 #define ONENAND_MAX_ENV_SIZE    CONFIG_ENV_SIZE
  24 #define ONENAND_ENV_SIZE(mtd)   (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 static int env_onenand_load(void)
  29 {
  30         struct mtd_info *mtd = &onenand_mtd;
  31 #ifdef CONFIG_ENV_ADDR_FLEX
  32         struct onenand_chip *this = &onenand_chip;
  33 #endif
  34         int rc;
  35         size_t retlen;
  36 #ifdef ENV_IS_EMBEDDED
  37         char *buf = (char *)&environment;
  38 #else
  39         loff_t env_addr = CONFIG_ENV_ADDR;
  40         char onenand_env[ONENAND_MAX_ENV_SIZE];
  41         char *buf = (char *)&onenand_env[0];
  42 #endif /* ENV_IS_EMBEDDED */
  43
  44 #ifndef ENV_IS_EMBEDDED
  45 # ifdef CONFIG_ENV_ADDR_FLEX
  46         if (FLEXONENAND(this))
  47                 env_addr = CONFIG_ENV_ADDR_FLEX;
  48 # endif
  49         /* Check OneNAND exist */
  50         if (mtd->writesize)
  51                 /* Ignore read fail */
  52                 mtd_read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
  53                                 &retlen, (u_char *)buf);
  54         else
  55                 mtd->writesize = MAX_ONENAND_PAGESIZE;
  56 #endif /* !ENV_IS_EMBEDDED */
  57
  58         rc = env_import(buf, 1, H_EXTERNAL);
  59         if (!rc)
  60                 gd->env_valid = ENV_VALID;
  61
  62         return rc;
  63 }
  64
  65 static int env_onenand_save(void)
  66 {
  67         env_t   env_new;
  68         int ret;
  69         struct mtd_info *mtd = &onenand_mtd;
  70 #ifdef CONFIG_ENV_ADDR_FLEX
  71         struct onenand_chip *this = &onenand_chip;
  72 #endif
  73         loff_t  env_addr = CONFIG_ENV_ADDR;
  74         size_t  retlen;
  75         struct erase_info instr = {};
  76
  77         ret = env_export(&env_new);
  78         if (ret)
  79                 return ret;
  80
  81         instr.len = CONFIG_ENV_SIZE;
  82 #ifdef CONFIG_ENV_ADDR_FLEX
  83         if (FLEXONENAND(this)) {
  84                 env_addr = CONFIG_ENV_ADDR_FLEX;
  85                 instr.len = CONFIG_ENV_SIZE_FLEX;
  86                 instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
  87                                 1 : 0;
  88         }
  89 #endif
  90         instr.addr = env_addr;
  91         instr.mtd = mtd;
  92         if (mtd_erase(mtd, &instr)) {
  93                 printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
  94                 return 1;
  95         }
  96
  97         if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
  98                         (u_char *)&env_new)) {
  99                 printf("OneNAND: write failed at 0x%llx\n", instr.addr);
 100                 return 2;
 101         }
 102
 103         return 0;
 104 }
 105
 106 U_BOOT_ENV_LOCATION(onenand) = {
 107         .location       = ENVL_ONENAND,
 108         ENV_NAME("OneNAND")
 109         .load           = env_onenand_load,
 110         .save           = env_save_ptr(env_onenand_save),
 111 };