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env_fat: use get_device_and_partition() during env save and load

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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>
This commit is contained in:
Wu, Josh 2014-06-24 17:31:02 +08:00 committed by Tom Rini
parent 8038b497e7
commit be354c1a21
2 changed files with 33 additions and 59 deletions
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84
common/env_fat.c
View file

@ -38,39 +38,24 @@ int saveenv(void)
{
env_t env_new;
block_dev_desc_t *dev_desc = NULL;
int dev = FAT_ENV_DEVICE;
int part = FAT_ENV_PART;
disk_partition_t info;
int dev, part;
int err;
err = env_export(&env_new);
if (err)
return err;
#ifdef CONFIG_MMC
if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
struct mmc *mmc = find_mmc_device(dev);
if (!mmc) {
printf("no mmc device at slot %x\n", dev);
return 1;
}
mmc->has_init = 0;
mmc_init(mmc);
}
#endif /* CONFIG_MMC */
dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
if (dev_desc == NULL) {
printf("Failed to find %s%d\n",
FAT_ENV_INTERFACE, dev);
part = get_device_and_partition(FAT_ENV_INTERFACE,
FAT_ENV_DEVICE_AND_PART,
&dev_desc, &info, 1);
if (part < 0)
return 1;
}
err = fat_register_device(dev_desc, part);
if (err) {
printf("Failed to register %s%d:%d\n",
FAT_ENV_INTERFACE, dev, part);
dev = dev_desc->dev;
if (fat_set_blk_dev(dev_desc, &info) != 0) {
printf("\n** Unable to use %s %d:%d for saveenv **\n",
FAT_ENV_INTERFACE, dev, part);
return 1;
}
@ -90,48 +75,33 @@ void env_relocate_spec(void)
{
char buf[CONFIG_ENV_SIZE];
block_dev_desc_t *dev_desc = NULL;
int dev = FAT_ENV_DEVICE;
int part = FAT_ENV_PART;
disk_partition_t info;
int dev, part;
int err;
#ifdef CONFIG_MMC
if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
struct mmc *mmc = find_mmc_device(dev);
part = get_device_and_partition(FAT_ENV_INTERFACE,
FAT_ENV_DEVICE_AND_PART,
&dev_desc, &info, 1);
if (part < 0)
goto err_env_relocate;
if (!mmc) {
printf("no mmc device at slot %x\n", dev);
set_default_env(NULL);
return;
}
mmc->has_init = 0;
mmc_init(mmc);
}
#endif /* CONFIG_MMC */
dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
if (dev_desc == NULL) {
printf("Failed to find %s%d\n",
FAT_ENV_INTERFACE, dev);
set_default_env(NULL);
return;
}
err = fat_register_device(dev_desc, part);
if (err) {
printf("Failed to register %s%d:%d\n",
FAT_ENV_INTERFACE, dev, part);
set_default_env(NULL);
return;
dev = dev_desc->dev;
if (fat_set_blk_dev(dev_desc, &info) != 0) {
printf("\n** Unable to use %s %d:%d for loading the env **\n",
FAT_ENV_INTERFACE, dev, part);
goto err_env_relocate;
}
err = file_fat_read(FAT_ENV_FILE, (uchar *)&buf, CONFIG_ENV_SIZE);
if (err == -1) {
printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
set_default_env(NULL);
return;
goto err_env_relocate;
}
env_import(buf, 1);
return;
err_env_relocate:
set_default_env(NULL);
}

8
include/configs/at91sam9m10g45ek.h
View file

@ -167,8 +167,12 @@
#elif CONFIG_SYS_USE_MMC
/* bootstrap + u-boot + env + linux in mmc */
#define FAT_ENV_INTERFACE "mmc"
#define FAT_ENV_DEVICE 0
#define FAT_ENV_PART 1
/*
* We don't specify the part number, if device 0 has partition table, it means
* the first partition; it no partition table, then take whole device as a
* FAT file system.
*/
#define FAT_ENV_DEVICE_AND_PART "0"
#define FAT_ENV_FILE "uboot.env"
#define CONFIG_ENV_IS_IN_FAT
#define CONFIG_FAT_WRITE