env/sata.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
   4  */
   5
   6 /* #define DEBUG */
   7
   8 #include <common.h>
   9
  10 #include <command.h>
  11 #include <env.h>
  12 #include <env_internal.h>
  13 #include <linux/stddef.h>
  14 #include <errno.h>
  15 #include <memalign.h>
  16 #include <sata.h>
  17 #include <search.h>
  18
  19 #if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  20 #error ENV REDUND not supported
  21 #endif
  22
  23 #if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
  24 #error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
  25 #endif
  26
  27 __weak int sata_get_env_dev(void)
  28 {
  29         return CONFIG_SYS_SATA_ENV_DEV;
  30 }
  31
  32 #ifdef CONFIG_CMD_SAVEENV
  33 static inline int write_env(struct blk_desc *sata, unsigned long size,
  34                             unsigned long offset, void *buffer)
  35 {
  36         uint blk_start, blk_cnt, n;
  37
  38         blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  39         blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
  40
  41         n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
  42
  43         return (n == blk_cnt) ? 0 : -1;
  44 }
  45
  46 static int env_sata_save(void)
  47 {
  48         ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  49         struct blk_desc *sata = NULL;
  50         int env_sata, ret;
  51
  52         if (sata_initialize())
  53                 return 1;
  54
  55         env_sata = sata_get_env_dev();
  56
  57         sata = sata_get_dev(env_sata);
  58         if (sata == NULL) {
  59                 printf("Unknown SATA(%d) device for environment!\n",
  60                        env_sata);
  61                 return 1;
  62         }
  63
  64         ret = env_export(env_new);
  65         if (ret)
  66                 return 1;
  67
  68         printf("Writing to SATA(%d)...", env_sata);
  69         if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)env_new)) {
  70                 puts("failed\n");
  71                 return 1;
  72         }
  73
  74         puts("done\n");
  75         return 0;
  76 }
  77 #endif /* CONFIG_CMD_SAVEENV */
  78
  79 static inline int read_env(struct blk_desc *sata, unsigned long size,
  80                            unsigned long offset, void *buffer)
  81 {
  82         uint blk_start, blk_cnt, n;
  83
  84         blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  85         blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
  86
  87         n = blk_dread(sata, blk_start, blk_cnt, buffer);
  88
  89         return (n == blk_cnt) ? 0 : -1;
  90 }
  91
  92 static void env_sata_load(void)
  93 {
  94         ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  95         struct blk_desc *sata = NULL;
  96         int env_sata;
  97
  98         if (sata_initialize())
  99                 return -EIO;
 100
 101         env_sata = sata_get_env_dev();
 102
 103         sata = sata_get_dev(env_sata);
 104         if (sata == NULL) {
 105                 printf("Unknown SATA(%d) device for environment!\n", env_sata);
 106                 return -EIO;
 107         }
 108
 109         if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
 110                 env_set_default(NULL, 0);
 111                 return -EIO;
 112         }
 113
 114         return env_import(buf, 1);
 115 }
 116
 117 U_BOOT_ENV_LOCATION(sata) = {
 118         .location       = ENVL_ESATA,
 119         ENV_NAME("SATA")
 120         .load           = env_sata_load,
 121         .save           = env_save_ptr(env_sata_save),
 122 };