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Refactor emmcsn_path_impl and return serial number if needed

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The refactoring also makes consecutive requests instantaneous.
This commit is contained in:
CTCaer
2021-01-03 14:45:06 +02:00
parent 8ce5d55eb8
commit 53b44a525d
6 changed files with 48 additions and 29 deletions
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56
nyx/nyx_gui/nyx.c
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@@ -69,43 +69,55 @@ const volatile ipl_ver_meta_t __attribute__((section ("._ipl_version"))) ipl_ver
volatile nyx_storage_t *nyx_str = (nyx_storage_t *)NYX_STORAGE_ADDR;
volatile boot_cfg_t *b_cfg;
void emmcsn_path_impl(char *path, char *sub_dir, char *filename, sdmmc_storage_t *storage)
char *emmcsn_path_impl(char *path, char *sub_dir, char *filename, sdmmc_storage_t *storage)
{
sdmmc_storage_t storage2;
sdmmc_t sdmmc;
char emmcSN[9];
bool init_done = false;
static char emmc_sn[9] = {0};
memcpy(path, "backup", 7);
f_mkdir(path);
// Check if eMMC S/N storage has valid data and skip parsing in that case.
if (emmc_sn[0] && strcmp(emmc_sn, "00000000"))
goto create_dir;
// Get actual eMMC S/N.
if (!storage)
{
sdmmc_t sdmmc;
sdmmc_storage_t storage2;
if (!sdmmc_storage_init_mmc(&storage2, &sdmmc, SDMMC_BUS_WIDTH_8, SDHCI_TIMING_MMC_HS400))
memcpy(emmcSN, "00000000", 9);
strcpy(emmc_sn, "00000000");
else
{
init_done = true;
itoa(storage2.cid.serial, emmcSN, 16);
itoa(storage2.cid.serial, emmc_sn, 16);
sdmmc_storage_end(&storage2);
}
}
else
itoa(storage->cid.serial, emmcSN, 16);
itoa(storage->cid.serial, emmc_sn, 16);
u32 sub_dir_len = strlen(sub_dir); // Can be a null-terminator.
u32 filename_len = strlen(filename); // Can be a null-terminator.
create_dir:
// Check if only eMMC S/N was requested.
if (!path)
return emmc_sn;
memcpy(path + strlen(path), "/", 2);
memcpy(path + strlen(path), emmcSN, 9);
// Create main folder.
strcpy(path, "backup");
f_mkdir(path);
memcpy(path + strlen(path), sub_dir, sub_dir_len + 1);
if (sub_dir_len)
f_mkdir(path);
memcpy(path + strlen(path), "/", 2);
memcpy(path + strlen(path), filename, filename_len + 1);
if (init_done)
sdmmc_storage_end(&storage2);
// Create eMMC S/N folder.
strcat(path, "/");
strcat(path, emmc_sn);
f_mkdir(path);
// Create sub folder if defined. Dir slash must be included.
strcat(path, sub_dir); // Can be a null-terminator.
if (strlen(sub_dir))
f_mkdir(path);
// Add filename.
strcat(path, "/");
strcat(path, filename); // Can be a null-terminator.
return emmc_sn;
}
// This is a safe and unused DRAM region for our payloads.