LXR uboot/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_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
  33static 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
  46static 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
  79static 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
  92static 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, H_EXTERNAL);
 115}
 116
 117U_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};
 123