LXR uboot/env/sata.c

   1/*
   2 * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7/* #define DEBUG */
   8
   9#include <common.h>
  10
  11#include <command.h>
  12#include <environment.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
  27DECLARE_GLOBAL_DATA_PTR;
  28
  29__weak int sata_get_env_dev(void)
  30{
  31        return CONFIG_SYS_SATA_ENV_DEV;
  32}
  33
  34#ifdef CONFIG_CMD_SAVEENV
  35static inline int write_env(struct blk_desc *sata, unsigned long size,
  36                            unsigned long offset, void *buffer)
  37{
  38        uint blk_start, blk_cnt, n;
  39
  40        blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  41        blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
  42
  43        n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
  44
  45        return (n == blk_cnt) ? 0 : -1;
  46}
  47
  48static int env_sata_save(void)
  49{
  50        ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  51        struct blk_desc *sata = NULL;
  52        int env_sata, ret;
  53
  54        if (sata_initialize())
  55                return 1;
  56
  57        env_sata = sata_get_env_dev();
  58
  59        sata = sata_get_dev(env_sata);
  60        if (sata == NULL) {
  61                printf("Unknown SATA(%d) device for environment!\n",
  62                       env_sata);
  63                return 1;
  64        }
  65
  66        ret = env_export(env_new);
  67        if (ret)
  68                return 1;
  69
  70        printf("Writing to SATA(%d)...", env_sata);
  71        if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, &env_new)) {
  72                puts("failed\n");
  73                return 1;
  74        }
  75
  76        puts("done\n");
  77        return 0;
  78}
  79#endif /* CONFIG_CMD_SAVEENV */
  80
  81static inline int read_env(struct blk_desc *sata, unsigned long size,
  82                           unsigned long offset, void *buffer)
  83{
  84        uint blk_start, blk_cnt, n;
  85
  86        blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  87        blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
  88
  89        n = blk_dread(sata, blk_start, blk_cnt, buffer);
  90
  91        return (n == blk_cnt) ? 0 : -1;
  92}
  93
  94static void env_sata_load(void)
  95{
  96        ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  97        struct blk_desc *sata = NULL;
  98        int env_sata;
  99
 100        if (sata_initialize())
 101                return -EIO;
 102
 103        env_sata = sata_get_env_dev();
 104
 105        sata = sata_get_dev(env_sata);
 106        if (sata == NULL) {
 107                printf("Unknown SATA(%d) device for environment!\n", env_sata);
 108                return -EIO;
 109        }
 110
 111        if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
 112                set_default_env(NULL);
 113                return -EIO;
 114        }
 115
 116        env_import(buf, 1);
 117
 118        return 0;
 119}
 120
 121U_BOOT_ENV_LOCATION(sata) = {
 122        .location       = ENVL_ESATA,
 123        ENV_NAME("SATA")
 124        .load           = env_sata_load,
 125        .save           = env_save_ptr(env_sata_save),
 126};
 127