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#include <furi.h>
#include <furi_hal.h>
#include <flipper.h>
#include <alt_boot.h>
#include <fatfs.h>
#include <flipper_format/flipper_format.h>
#include <update_util/update_manifest.h>
#include <update_util/update_operation.h>
#include <toolbox/path.h>
#include <toolbox/crc32_calc.h>
#define UPDATE_POINTER_FILE_PATH "/" UPDATE_MANIFEST_POINTER_FILE_NAME
static FATFS* pfs = NULL;
#define CHECK_FRESULT(result) \
{ \
if((result) != FR_OK) { \
return false; \
} \
}
static bool flipper_update_mount_sd() {
for(int i = 0; i < BSP_SD_MaxMountRetryCount(); ++i) {
if(BSP_SD_Init((i % 2) == 0) != MSD_OK) {
/* Next attempt will be without card reset, let it settle */
furi_delay_ms(1000);
continue;
}
if(f_mount(pfs, "/", 1) == FR_OK) {
return true;
}
}
return false;
}
static bool flipper_update_init() {
furi_hal_clock_init();
furi_hal_rtc_init();
furi_hal_interrupt_init();
furi_hal_spi_init();
MX_FATFS_Init();
if(!hal_sd_detect()) {
return false;
}
pfs = malloc(sizeof(FATFS));
return flipper_update_mount_sd();
}
static bool flipper_update_load_stage(const string_t work_dir, UpdateManifest* manifest) {
FIL file;
FILINFO stat;
string_t loader_img_path;
string_init_set(loader_img_path, work_dir);
path_append(loader_img_path, string_get_cstr(manifest->staged_loader_file));
if((f_stat(string_get_cstr(loader_img_path), &stat) != FR_OK) ||
(f_open(&file, string_get_cstr(loader_img_path), FA_OPEN_EXISTING | FA_READ) != FR_OK)) {
string_clear(loader_img_path);
return false;
}
string_clear(loader_img_path);
void* img = malloc(stat.fsize);
uint32_t bytes_read = 0;
const uint16_t MAX_READ = 0xFFFF;
uint32_t crc = 0;
do {
uint16_t size_read = 0;
if(f_read(&file, img + bytes_read, MAX_READ, &size_read) != FR_OK) {
break;
}
crc = crc32_calc_buffer(crc, img + bytes_read, size_read);
bytes_read += size_read;
} while(bytes_read == MAX_READ);
do {
if((bytes_read != stat.fsize) || (crc != manifest->staged_loader_crc)) {
break;
}
/* Point of no return. Literally
*
* NB: we MUST disable IRQ, otherwise handlers from flash
* will change global variables (like tick count)
* that are located in .data. And we move staged loader
* to the same memory region. So, IRQ handlers will mess up
* memmove'd .text section and ruin your day.
* We don't want that to happen.
*/
__disable_irq();
memmove((void*)(SRAM1_BASE), img, stat.fsize);
LL_SYSCFG_SetRemapMemory(LL_SYSCFG_REMAP_SRAM);
furi_hal_switch((void*)SRAM1_BASE);
return true;
} while(false);
free(img);
return false;
}
static bool flipper_update_get_manifest_path(string_t out_path) {
FIL file;
FILINFO stat;
uint16_t size_read = 0;
char manifest_name_buf[UPDATE_OPERATION_MAX_MANIFEST_PATH_LEN] = {0};
string_reset(out_path);
CHECK_FRESULT(f_stat(UPDATE_POINTER_FILE_PATH, &stat));
CHECK_FRESULT(f_open(&file, UPDATE_POINTER_FILE_PATH, FA_OPEN_EXISTING | FA_READ));
do {
if(f_read(&file, manifest_name_buf, UPDATE_OPERATION_MAX_MANIFEST_PATH_LEN, &size_read) !=
FR_OK) {
break;
}
if((size_read == 0) || (size_read == UPDATE_OPERATION_MAX_MANIFEST_PATH_LEN)) {
break;
}
string_set_str(out_path, manifest_name_buf);
string_right(out_path, strlen(STORAGE_EXT_PATH_PREFIX));
} while(0);
f_close(&file);
return !string_empty_p(out_path);
}
static UpdateManifest* flipper_update_process_manifest(const string_t manifest_path) {
FIL file;
FILINFO stat;
CHECK_FRESULT(f_stat(string_get_cstr(manifest_path), &stat));
CHECK_FRESULT(f_open(&file, string_get_cstr(manifest_path), FA_OPEN_EXISTING | FA_READ));
uint8_t* manifest_data = malloc(stat.fsize);
uint32_t bytes_read = 0;
const uint16_t MAX_READ = 0xFFFF;
do {
uint16_t size_read = 0;
if(f_read(&file, manifest_data + bytes_read, MAX_READ, &size_read) != FR_OK) {
break;
}
bytes_read += size_read;
} while(bytes_read == MAX_READ);
UpdateManifest* manifest = NULL;
do {
if(bytes_read != stat.fsize) {
break;
}
manifest = update_manifest_alloc();
if(!update_manifest_init_mem(manifest, manifest_data, bytes_read)) {
update_manifest_free(manifest);
manifest = NULL;
}
} while(false);
f_close(&file);
free(manifest_data);
return manifest;
}
void flipper_boot_update_exec() {
if(!flipper_update_init()) {
return;
}
string_t work_dir, manifest_path;
string_init(work_dir);
string_init(manifest_path);
do {
if(!flipper_update_get_manifest_path(manifest_path)) {
break;
}
UpdateManifest* manifest = flipper_update_process_manifest(manifest_path);
if(!manifest) {
break;
}
path_extract_dirname(string_get_cstr(manifest_path), work_dir);
if(!flipper_update_load_stage(work_dir, manifest)) {
update_manifest_free(manifest);
}
} while(false);
string_clear(manifest_path);
string_clear(work_dir);
free(pfs);
}
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