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authorDileep Katta <dileep.katta@linaro.org>2015-02-17 18:48:23 +0530
committerMarek Vasut <marex@denx.de>2015-02-25 17:47:02 +0100
commit897923819cda6f26fe8a5921c595871526ab6a9c (patch)
tree1a74519d30ebd7151aab0efb3caf3a6ffdc82ad3 /common
parent2474b7f1499e81b68cf1b4610dd7ee2cd0c9ba88 (diff)
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usb: gadget: fastboot: Add fastboot erase
Adds the fastboot erase functionality, to erase a partition specified by name. The erase is performed based on erase group size, to avoid erasing other partitions. The start address and the size is aligned to the erase group size for this. Currently only supports erasing from eMMC. Signed-off-by: Dileep Katta <dileep.katta@linaro.org> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Diffstat (limited to 'common')
-rw-r--r--common/fb_mmc.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index 6ea3938..513b7ab 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -10,6 +10,7 @@
#include <part.h>
#include <aboot.h>
#include <sparse_format.h>
+#include <mmc.h>
#ifndef CONFIG_FASTBOOT_GPT_NAME
#define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
@@ -110,3 +111,58 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
write_raw_image(dev_desc, &info, cmd, download_buffer,
download_bytes);
}
+
+void fb_mmc_erase(const char *cmd, char *response)
+{
+ int ret;
+ block_dev_desc_t *dev_desc;
+ disk_partition_t info;
+ lbaint_t blks, blks_start, blks_size, grp_size;
+ struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
+
+ if (mmc == NULL) {
+ error("invalid mmc device");
+ fastboot_fail("invalid mmc device");
+ return;
+ }
+
+ /* initialize the response buffer */
+ response_str = response;
+
+ dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
+ if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
+ error("invalid mmc device");
+ fastboot_fail("invalid mmc device");
+ return;
+ }
+
+ ret = get_partition_info_efi_by_name(dev_desc, cmd, &info);
+ if (ret) {
+ error("cannot find partition: '%s'", cmd);
+ fastboot_fail("cannot find partition");
+ return;
+ }
+
+ /* Align blocks to erase group size to avoid erasing other partitions */
+ grp_size = mmc->erase_grp_size;
+ blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
+ if (info.size >= grp_size)
+ blks_size = (info.size - (blks_start - info.start)) &
+ (~(grp_size - 1));
+ else
+ blks_size = 0;
+
+ printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
+ blks_start, blks_start + blks_size);
+
+ blks = dev_desc->block_erase(dev_desc->dev, blks_start, blks_size);
+ if (blks != blks_size) {
+ error("failed erasing from device %d", dev_desc->dev);
+ fastboot_fail("failed erasing from device");
+ return;
+ }
+
+ printf("........ erased " LBAFU " bytes from '%s'\n",
+ blks_size * info.blksz, cmd);
+ fastboot_okay("");
+}