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fastboot: check for alias when looking up partition by name 

Implement an alias name check for devices where GPT limitations prevent
user-friendly partition names such as "boot", "system" and "cache". Or,
where the actual partition name doesn't match a standard partition name
used commonly with fastboot.

To set an alias, add an environment setting as follows:
fastboot_partition_alias_<alias partition name>=<actual partition name>

Example: fastboot_partition_alias_boot=LNX

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Acked-by: Steve Rae <srae@broadcom.com>
Cc: Steve Rae <srae@broadcom.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
This commit is contained in:
Michael Scott 2015-03-11 10:02:31 -07:00 committed by Lukasz Majewski
parent 0a9ac5cb5e
commit 8a41802f21
2 changed files with 33 additions and 2 deletions
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26
common/fb_mmc.c
View File

@ -33,6 +33,28 @@ void fastboot_okay(const char *s)
strncat(response_str, s, RESPONSE_LEN - 4 - 1);
}
static int get_partition_info_efi_by_name_or_alias(block_dev_desc_t *dev_desc,
const char *name, disk_partition_t *info)
{
int ret;
ret = get_partition_info_efi_by_name(dev_desc, name, info);
if (ret) {
/* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
char env_alias_name[25 + 32 + 1];
char *aliased_part_name;
/* check for alias */
strcpy(env_alias_name, "fastboot_partition_alias_");
strncat(env_alias_name, name, 32);
aliased_part_name = getenv(env_alias_name);
if (aliased_part_name != NULL)
ret = get_partition_info_efi_by_name(dev_desc,
aliased_part_name, info);
}
return ret;
}
static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
const char *part_name, void *buffer,
unsigned int download_bytes)
@ -98,7 +120,7 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
printf("........ success\n");
fastboot_okay("");
return;
} else if (get_partition_info_efi_by_name(dev_desc, cmd, &info)) {
} else if (get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
error("cannot find partition: '%s'\n", cmd);
fastboot_fail("cannot find partition");
return;
@ -136,7 +158,7 @@ void fb_mmc_erase(const char *cmd, char *response)
return;
}
ret = get_partition_info_efi_by_name(dev_desc, cmd, &info);
ret = get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info);
if (ret) {
error("cannot find partition: '%s'", cmd);
fastboot_fail("cannot find partition");

9
doc/README.android-fastboot
View File

@ -50,6 +50,15 @@ buffer should be as large as possible for a platform. The location of the
buffer and size are set with CONFIG_USB_FASTBOOT_BUF_ADDR and
CONFIG_USB_FASTBOOT_BUF_SIZE.
Fastboot partition aliases can also be defined for devices where GPT
limitations prevent user-friendly partition names such as "boot", "system"
and "cache". Or, where the actual partition name doesn't match a standard
partition name used commonly with fastboot. Current implentation checks
aliases when accessing partitions by name (flash_write and erase functions).
To define a partition alias add an environment variable similar to:
fastboot_partition_alias_<alias partition name>=<actual partition name>
Example: fastboot_partition_alias_boot=LNX
In Action
=========
Enter into fastboot by executing the fastboot command in u-boot and you