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sdmmc v2: Add full SD card fallback initialization

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hekate main always runs in compatibility mode (SDR82).
This ensures speed on boot process.

Nyx will first try SDR104.
If the sd card is a sandisk U1 and fails, it will try the compatibility mode.
After that it fallbacks to lower bus speeds.

Both support 1bit mode for broken sd card readers.

Having the new error checking in the sdmmc driver, allows for all that to work.
It can now fail instead of continuing, like how HOS reacts.
This commit is contained in:
CTCaer
2020-04-30 00:00:00 +03:00
parent 034f680a8e
commit ce97b97c8d
6 changed files with 230 additions and 21 deletions
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81
bootloader/storage/nx_sd.c
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@@ -23,24 +23,96 @@
#include "../mem/heap.h"
static bool sd_mounted = false;
static u32 sd_mode = SD_UHS_SDR82;
u32 sd_mode_get()
{
return sd_mode;
}
int sd_init_retry(bool power_cycle)
{
u32 bus_width = SDMMC_BUS_WIDTH_4;
u32 type = SDHCI_TIMING_UHS_SDR82;
// Power cycle SD card.
if (power_cycle)
{
sd_mode--;
sdmmc_storage_end(&sd_storage);
}
// Get init parameters.
switch (sd_mode)
{
case SD_INIT_FAIL: // Reset to max.
return 0;
case SD_1BIT_HS25:
bus_width = SDMMC_BUS_WIDTH_1;
type = SDHCI_TIMING_SD_HS25;
break;
case SD_4BIT_HS25:
type = SDHCI_TIMING_SD_HS25;
break;
case SD_UHS_SDR82:
type = SDHCI_TIMING_UHS_SDR82;
break;
default:
sd_mode = SD_UHS_SDR82;
}
return sdmmc_storage_init_sd(&sd_storage, &sd_sdmmc, bus_width, type);
}
bool sd_initialize(bool power_cycle)
{
if (power_cycle)
sdmmc_storage_end(&sd_storage);
int res = !sd_init_retry(false);
while (true)
{
if (!res)
return true;
else if (!sdmmc_get_sd_inserted()) // SD Card is not inserted.
{
sd_mode = SD_UHS_SDR82;
break;
}
else if (sd_mode == SD_INIT_FAIL)
break;
else
res = !sd_init_retry(true);
}
sdmmc_storage_end(&sd_storage);
return false;
}
bool sd_mount()
{
if (sd_mounted)
return true;
if (!sdmmc_storage_init_sd(&sd_storage, &sd_sdmmc, SDMMC_BUS_WIDTH_4, SDHCI_TIMING_UHS_SDR82))
int res = !sd_initialize(false);
if (res)
{
gfx_con.mute = false;
EPRINTF("Failed to init SD card.\nMake sure that it is inserted.\nOr that SD reader is properly seated!");
EPRINTF("Failed to init SD card.");
if (!sdmmc_get_sd_inserted())
EPRINTF("Make sure that it is inserted.");
else
EPRINTF("SD Card Reader is not properly seated!");
}
else
{
int res = 0;
res = f_mount(&sd_fs, "", 1);
if (res == FR_OK)
{
sd_mounted = 1;
sd_mounted = true;
return true;
}
else
@@ -55,6 +127,7 @@ bool sd_mount()
void sd_unmount()
{
sd_mode = SD_UHS_SDR82;
if (sd_mounted)
{
f_mount(NULL, "", 1);