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https://github.com/AsahiLinux/u-boot
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be354c1a21
Use get_device_and_partition() is better since:
1. It will call the device initialize function internally. So we can
remove the mmc intialization code to save many lines.
2. It is used by fatls/fatload/fatwrite. So saveenv & load env should
use it too.
3. It can parse the "D:P", "D", "D:", "D:auto" string to get correct
device and partition information by run-time.
Also we remove the FAT_ENV_DEVICE and FAT_ENV_PART. We use a string:
FAT_ENV_DEVICE_AND_PART.
For at91sam9m10g45ek, it is "0". That means use device 0 and if:
a)device 0 has no partition table, use the whole device as a FAT file
system.
b)device 0 has partittion table, use the partition #1.
Refer to the commit: 10a37fd7a4 for details of device & partition string.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
/*
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* (c) Copyright 2011 by Tigris Elektronik GmbH
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*
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* Author:
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* Maximilian Schwerin <mvs@tigris.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <search.h>
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#include <errno.h>
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#include <fat.h>
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#include <mmc.h>
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char *env_name_spec = "FAT";
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env_t *env_ptr;
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DECLARE_GLOBAL_DATA_PTR;
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_CMD_SAVEENV
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int saveenv(void)
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{
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env_t env_new;
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block_dev_desc_t *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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err = env_export(&env_new);
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if (err)
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return err;
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part = get_device_and_partition(FAT_ENV_INTERFACE,
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FAT_ENV_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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return 1;
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dev = dev_desc->dev;
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if (fat_set_blk_dev(dev_desc, &info) != 0) {
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printf("\n** Unable to use %s %d:%d for saveenv **\n",
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FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t));
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if (err == -1) {
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printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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void env_relocate_spec(void)
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{
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char buf[CONFIG_ENV_SIZE];
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block_dev_desc_t *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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part = get_device_and_partition(FAT_ENV_INTERFACE,
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FAT_ENV_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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goto err_env_relocate;
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dev = dev_desc->dev;
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if (fat_set_blk_dev(dev_desc, &info) != 0) {
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printf("\n** Unable to use %s %d:%d for loading the env **\n",
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FAT_ENV_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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err = file_fat_read(FAT_ENV_FILE, (uchar *)&buf, CONFIG_ENV_SIZE);
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if (err == -1) {
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printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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env_import(buf, 1);
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return;
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err_env_relocate:
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set_default_env(NULL);
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}
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