MMC storage supports 4 hardware partitions:
* User partition
* 2 boot partitions
* RPMB partition
Flashing to the User partition is already supported, and this commit
adds support for flashing to the 2 boot partitions.
User can run the following commands to flash to the boot partitions:
fastboot flash mmcboot0 myfile
fastboot flash mmcboot1 myfile
"mmcboot" is the default name of the partition and can be changed via
a Kconfig option.
Signed-off-by: Fabien Parent <fpar...@baylibre.com>
---
drivers/fastboot/Kconfig | 17 +++++++++++++++++
drivers/fastboot/fb_mmc.c | 36 +++++++++++++++++++++++++++++++++++-
2 files changed, 52 insertions(+), 1 deletion(-)
diff --git a/drivers/fastboot/Kconfig b/drivers/fastboot/Kconfig
index d63ecdd27e..f481d7596c 100644
--- a/drivers/fastboot/Kconfig
+++ b/drivers/fastboot/Kconfig
@@ -126,6 +126,23 @@ config FASTBOOT_MBR_NAME
specified on the "fastboot flash" command line matches the value
defined here. The default target name for updating MBR is "mbr".
+config FASTBOOT_MMC_BOOT_PART_NAME
+ string "Target name for updating MMC's boot partitions"
+ depends on FASTBOOT_FLASH_MMC
+ default "mmcboot"
+ help
+ The fastboot "flash" command supports writing the downloaded
+ image to the MMC's boot partitions.
+ This occurs when the specified "partition name" on the
+ "fastboot flash" command line is starts with the value defined here,
+ and ends with '0' or '1' to specify which boot partition is being
+ targeted.
+ The default name for updating the boot partitions is "mmcboot".
+ For example the two partitions can be flashed using the following
+ commands if the default name is used:
+ - "fastboot flash mmcboot0 myfile",
+ - "fastboot flash mmcboot1 myfile".
+
config FASTBOOT_CMD_OEM_FORMAT
bool "Enable the 'oem format' command"
depends on FASTBOOT_FLASH_MMC && CMD_GPT
diff --git a/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
index 90ca81da9b..c2451200f7 100644
--- a/drivers/fastboot/fb_mmc.c
+++ b/drivers/fastboot/fb_mmc.c
@@ -46,6 +46,28 @@ static int part_get_info_by_name_or_alias(struct blk_desc
*dev_desc,
return ret;
}
+static int part_get_mmc_boot_info(int hwpart, disk_partition_t *info)
+{
+ struct mmc *mmc;
+ int ret;
+
+ mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
+ if (!mmc)
+ return -EINVAL;
+
+ ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
+ CONFIG_FASTBOOT_FLASH_MMC_DEV, hwpart);
+ if (ret < 0)
+ return ret;
+
+ memset(info, 0, sizeof(*info));
+ info->start = 0;
+ info->size = mmc->capacity_boot;
+ info->blksz = mmc->write_bl_len;
+
+ return 0;
+}
+
/**
* fb_mmc_blk_write() - Write/erase MMC in chunks of FASTBOOT_MAX_BLK_WRITE
*
@@ -394,7 +416,19 @@ void fastboot_mmc_flash_write(const char *cmd, void
*download_buffer,
}
#endif
- if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
+ if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT_PART_NAME "0") == 0) {
+ if (part_get_mmc_boot_info(1, &info) < 0) {
+ pr_err("cannot find partition: '%s'\n", cmd);
+ fastboot_fail("cannot find partition", response);
+ return;
+ }
+ } else if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT_PART_NAME "1") == 0) {
+ if (part_get_mmc_boot_info(2, &info) < 0) {
+ pr_err("cannot find partition: '%s'\n", cmd);
+ fastboot_fail("cannot find partition", response);
+ return;
+ }
+ } else if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
pr_err("cannot find partition: '%s'\n", cmd);
fastboot_fail("cannot find partition", response);
return;
--
2.20.1
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