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