[FL-977] Internal Storage (#455)

* Add littlefs submodule
* Furi: add mutex in logging, fix issues with corrupted printf
* ApiHal: disable debug traces in ble glue
* App-loader: more logs
* Passport: fix invalid DolphinState usage
* ApiHal, linker script: flash API is now aware of free space, complete abstraction layer for storage
* Internal Storage: littlefs based storage services with key value API. Migrate dolphin state to new storage API.

firmware/targets/f5/api-hal/api-hal-flash.c

@@ -1,6 +1,59 @@
 #include <api-hal-flash.h>
 #include <api-hal-bt.h>
 #include <stm32wbxx.h>
+#include <furi.h>
+
+/* Free flash space borders, exported by linker */
+extern const void __free_flash_start__;
+extern const void __free_flash_end__;
+
+#define API_HAL_FLASH_READ_BLOCK 8
+#define API_HAL_FLASH_WRITE_BLOCK 8
+#define API_HAL_FLASH_PAGE_SIZE 4096
+#define API_HAL_FLASH_CYCLES_COUNT 10000
+
+size_t api_hal_flash_get_base() {
+    return FLASH_BASE;
+}
+
+size_t api_hal_flash_get_read_block_size() {
+    return API_HAL_FLASH_READ_BLOCK;
+}
+
+size_t api_hal_flash_get_write_block_size() {
+    return API_HAL_FLASH_WRITE_BLOCK;
+}
+
+size_t api_hal_flash_get_page_size() {
+    return API_HAL_FLASH_PAGE_SIZE;
+}
+
+size_t api_hal_flash_get_cycles_count() {
+    return API_HAL_FLASH_CYCLES_COUNT;
+}
+
+const void* api_hal_flash_get_free_start_address() {
+    return &__free_flash_start__;
+}
+
+const void* api_hal_flash_get_free_end_address() {
+    return &__free_flash_end__;
+}
+
+size_t api_hal_flash_get_free_page_start_address() {
+    size_t start = (size_t)api_hal_flash_get_free_start_address();
+    size_t page_start = start - start % API_HAL_FLASH_PAGE_SIZE;
+    if (page_start != start) {
+        page_start += API_HAL_FLASH_PAGE_SIZE;
+    }
+    return page_start;
+}
+
+size_t api_hal_flash_get_free_page_count() {
+    size_t end = (size_t)api_hal_flash_get_free_end_address();
+    size_t page_start = (size_t)api_hal_flash_get_free_page_start_address();
+    return (end-page_start) / API_HAL_FLASH_PAGE_SIZE;
+}
 
 bool api_hal_flash_erase(uint8_t page, uint8_t count) {
     if (!api_hal_bt_lock_flash()) {
@@ -25,7 +78,7 @@ bool api_hal_flash_write_dword(size_t address, uint64_t data) {
     return status == HAL_OK;
 }
 
-bool api_hal_flash_write_row(size_t address, size_t source_address) {
+bool api_hal_flash_write_dword_from(size_t address, size_t source_address) {
     if (!api_hal_bt_lock_flash()) {
         return false;
     }