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sdmmc: add get sda spec version function

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Returned number is major version.
This commit is contained in:
CTCaer
2026-06-09 07:00:26 +03:00
parent d873ebf0cd
commit 0eb287bc18
2 changed files with 43 additions and 4 deletions
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44
bdk/storage/sdmmc.c
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@@ -1113,10 +1113,45 @@ static int _sd_storage_get_rca(sdmmc_storage_t *storage)
return 1;
}
u8 sd_storage_get_scr_sda_ver(sdmmc_storage_t *storage)
{
u8 version = 0;
u8 sda_spec = storage->scr.sda_vsn;
u8 sda_spec3 = storage->scr.sda_spec & 1;
u8 sda_spec4 = (storage->scr.sda_spec >> 1) & 1;
u8 sda_specx = storage->scr.sda_spec >> 4;
switch (sda_spec)
{
case 0:
version = 1;
break;
case 1:
version = 1;
break;
case 2:
if (!sda_spec3)
version = 2;
else if (!sda_spec4 && !sda_specx)
version = 3;
else
version = sda_specx + 4;
break;
}
return version;
}
static void _sd_storage_parse_scr(sdmmc_storage_t *storage)
{
// unstuff_bits can parse only 4 u32
u32 scr[4];
u8 sda_spec3 = 0;
u8 sda_spec4 = 0;
u8 sda_specx = 0;
memcpy(&scr[2], storage->raw_scr, 8);
@@ -1129,15 +1164,18 @@ static void _sd_storage_parse_scr(sdmmc_storage_t *storage)
// If v2.0 is supported, check if Physical Layer Spec v3.0 is supported.
if (storage->scr.sda_vsn == SCR_SPEC_VER_2)
storage->scr.sda_spec3 = unstuff_bits(scr, 47, 1);
if (storage->scr.sda_spec3)
sda_spec3 = unstuff_bits(scr, 47, 1);
if (sda_spec3)
{
u8 sda_spec4 = unstuff_bits(scr, 42, 1);
sda_spec4 = unstuff_bits(scr, 42, 1);
sda_specx = unstuff_bits(scr, 38, 4);
if (sda_spec4)
storage->scr.cmds = unstuff_bits(scr, 32, 4);
else
storage->scr.cmds = unstuff_bits(scr, 32, 2);
}
storage->scr.sda_spec = sda_spec3 | (sda_spec4 << 1) | (sda_specx << 4);
}
int sd_storage_get_scr(sdmmc_storage_t *storage)

3
bdk/storage/sdmmc.h
View File

@@ -161,7 +161,7 @@ typedef struct _mmc_ext_csd
typedef struct _sd_scr
{
u8 sda_vsn;
u8 sda_spec3;
u8 sda_spec;
u8 bus_widths;
u8 cmds;
} sd_scr_t;
@@ -238,6 +238,7 @@ int mmc_storage_get_ext_csd(sdmmc_storage_t *storage);
int sd_storage_get_ext_reg(sdmmc_storage_t *storage, u8 fno, u8 page, u16 offset, u32 len, void *buf);
int sd_storage_get_fmodes(sdmmc_storage_t *storage, u8 *buf, sd_func_modes_t *functions);
int sd_storage_get_scr(sdmmc_storage_t *storage);
u8 sd_storage_get_scr_sda_ver(sdmmc_storage_t *storage);
int sd_storage_get_ssr(sdmmc_storage_t *storage);
u32 sd_storage_get_ssr_au(sdmmc_storage_t *storage);