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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2017-2026 TQ-Systems GmbH <[email protected]>,
* D-82229 Seefeld, Germany.
* Author: Markus Niebel
*/
#include <fdt_support.h>
#include <mmc.h>
#include "tqma6_emmc.h"
struct emmc_dsr_lookup {
uint mfgid;
char *pnm;
int dsr_needed;
};
static const struct emmc_dsr_lookup dsr_tbl[] = {
/* Micron, eMMC 4.41 */
{ 0xfe, "MMC02G", 1 },
{ 0xfe, "MMC04G", 1 },
{ 0xfe, "MMC08G", 1 },
/* Micron, eMMC 5.0 4 GB*/
{ 0x13, "Q1J54A", 1 },
{ 0x13, "Q2J54A", 1 },
/* Micron, eMMC 5.0 8 GB*/
{ 0x13, "Q2J55L", 0 },
/* Samsung, eMMC 5.0 */
{ 0x15, "8GSD3R", 0 },
{ 0x15, "AGSD3R", 0 },
{ 0x15, "BGSD3R", 0 },
{ 0x15, "CGSD3R", 0 },
/* SanDisk, iNAND 7250 5.1 */
{ 0x45, "DG4008", 0 },
{ 0x45, "DG4016", 0 },
{ 0x45, "DG4032", 0 },
{ 0x45, "DG4064", 0 },
/* Kingston */
{ 0x100, "?????", 0 },
};
int tqma6_emmc_need_dsr(const struct mmc *mmc)
{
uint mfgid = mmc->cid[0] >> 24;
char name[7];
int ret = -1;
size_t i;
if (IS_SD(mmc))
return 0;
sprintf(name, "%c%c%c%c%c%c", mmc->cid[0] & 0xff, (mmc->cid[1] >> 24),
(mmc->cid[1] >> 16) & 0xff, (mmc->cid[1] >> 8) & 0xff,
mmc->cid[1] & 0xff, (mmc->cid[2] >> 24));
for (i = 0; i < ARRAY_SIZE(dsr_tbl) && (ret < 0); ++i) {
if (dsr_tbl[i].mfgid == mfgid &&
(!strncmp(name, dsr_tbl[i].pnm, 6))) {
ret = dsr_tbl[i].dsr_needed;
debug("MFG: %x PNM: %s\n", mfgid, name);
}
}
if (ret < 0) {
printf("eMMC unknown: MFG: %x PNM: %s\n", mfgid, name);
/* request DSR, even if not known if supported to be safe */
ret = 1;
}
return ret;
}
void tqma6_ft_fixup_emmc_dsr(void *blob, const char *path, u32 value)
{
do_fixup_by_path_u32(blob, path, "dsr", value, 1);
}
void tqma6_mmc_detect_card_type(struct mmc *mmc)
{
struct mmc *emmc = find_mmc_device(0);
if (emmc != mmc)
return;
if (tqma6_emmc_need_dsr(mmc) > 0)
mmc_set_dsr(mmc, TQMA6_EMMC_DSR);
}
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