feat(msc_host): Add format MSC support

Closes espressif/esp-idf#14890

host/class/msc/usb_host_msc/include/usb/msc_host_vfs.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -16,6 +16,16 @@ extern "C" {
 
 typedef struct msc_host_vfs *msc_host_vfs_handle_t;           /**< VFS handle to attached Mass Storage device */
 
+/**
+ * @brief Format MSC device.
+ *
+ * @param[in] device Device handle obtained from MSC callback provided upon initialization
+ * @param[in] mount_config Mount configuration
+ * @param[in] vfs_handle Handle to MSC device associated with registered VFS
+ * @return esp_err_t
+ */
+esp_err_t esp_vfs_fat_usb_msc_format(msc_host_device_handle_t device, const esp_vfs_fat_mount_config_t *mount_config, const msc_host_vfs_handle_t vfs_handle);
+
 /**
  * @brief Register MSC device to Virtual filesystem.
  *

host/class/msc/usb_host_msc/src/msc_host_vfs.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -52,6 +52,18 @@ static esp_err_t msc_format_storage(size_t block_size, size_t allocation_size, c
     return ESP_OK;
 }
 
+esp_err_t esp_vfs_fat_usb_msc_format(msc_host_device_handle_t device, const esp_vfs_fat_mount_config_t *mount_config, const msc_host_vfs_handle_t vfs_handle)
+{
+    MSC_RETURN_ON_INVALID_ARG(device);
+    MSC_RETURN_ON_INVALID_ARG(mount_config);
+    MSC_RETURN_ON_INVALID_ARG(vfs_handle);
+
+    size_t block_size = ((msc_device_t *)device)->disk.block_size;
+    size_t alloc_size = mount_config->allocation_unit_size;
+
+    return msc_format_storage(block_size, alloc_size, vfs_handle->drive);
+}
+
 static void dealloc_msc_vfs(msc_host_vfs_t *vfs)
 {
     free(vfs->base_path);