diff mbox series

[v8,10/10] mmc: core: Enable SDUC

Message ID 20241006051148.160278-11-avri.altman@wdc.com (mailing list archive)
State New
Headers show
Series Add SDUC Support | expand

Commit Message

Avri Altman Oct. 6, 2024, 5:11 a.m. UTC 
Enable SDUC if the card responded to ACMD41 with HCS & HO2T bits set.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/mmc/core/sd.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 33e806adcbf7..918b86bf8bbb 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -836,8 +836,11 @@  int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
 	 * block-addressed SDHC cards.
 	 */
 	err = mmc_send_if_cond(host, ocr);
-	if (!err)
+	if (!err) {
 		ocr |= SD_OCR_CCS;
+		/* Set HO2T as well - SDUC card won't respond otherwise */
+		ocr |= SD_OCR_2T;
+	}
 
 	/*
 	 * If the host supports one of UHS-I modes, request the card
@@ -1448,7 +1451,10 @@  static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 	}
 
 	if (!oldcard) {
-		err = mmc_sd_get_csd(card, false);
+		u32 sduc_arg = SD_OCR_CCS | SD_OCR_2T;
+		bool is_sduc = (rocr & sduc_arg) == sduc_arg;
+
+		err = mmc_sd_get_csd(card, is_sduc);
 		if (err)
 			goto free_card;