diff mbox series

mmc: sdhci-tegra: Issue CMD and DAT resets together

Message ID 20220912132728.18383-1-pshete@nvidia.com
State New
Headers show
Series mmc: sdhci-tegra: Issue CMD and DAT resets together | expand

Commit Message

Prathamesh Shete Sept. 12, 2022, 1:27 p.m. UTC 
In case of error condition to avoid system crash
Tegra SDMMC controller requires CMD and DAT resets
issued together.

This is applicable to Tegar186 and later chips.

Signed-off-by: Aniruddha TVS Rao <anrao@nvidia.com>
Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
---
 drivers/mmc/host/sdhci-tegra.c |  3 ++-
 drivers/mmc/host/sdhci.c       | 10 ++++++++--
 drivers/mmc/host/sdhci.h       |  2 ++
 3 files changed, 12 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 2d2d8260c681..0a82cbedabe4 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -1525,7 +1525,8 @@  static const struct sdhci_pltfm_data sdhci_tegra186_pdata = {
 		  SDHCI_QUIRK_NO_HISPD_BIT |
 		  SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
 		  SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
-	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+		   SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER,
 	.ops  = &tegra186_sdhci_ops,
 };
 
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 7689ffec5ad1..89ede0cf674a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3063,8 +3063,14 @@  static bool sdhci_request_done(struct sdhci_host *host)
 		 * Spec says we should do both at the same time, but Ricoh
 		 * controllers do not like that.
 		 */
-		sdhci_do_reset(host, SDHCI_RESET_CMD);
-		sdhci_do_reset(host, SDHCI_RESET_DATA);
+		if (host->quirks2 &
+			SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER) {
+			sdhci_do_reset(host, SDHCI_RESET_CMD |
+					SDHCI_RESET_DATA);
+		} else {
+			sdhci_do_reset(host, SDHCI_RESET_CMD);
+			sdhci_do_reset(host, SDHCI_RESET_DATA);
+		}
 
 		host->pending_reset = false;
 	}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 95a08f09df30..111e9bf98dde 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -480,6 +480,8 @@  struct sdhci_host {
  * block count.
  */
 #define SDHCI_QUIRK2_USE_32BIT_BLK_CNT			(1<<18)
+/* Issue CMD and DATA reset together */
+#define SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER	(1<<19)
 
 	int irq;		/* Device IRQ */
 	void __iomem *ioaddr;	/* Mapped address */